LU-354 test: Change dev_set_rdonly() check to warning

[fs/lustre-release.git] / lustre / kernel_patches / patches / 2.6-rhel5-kgdb-ga.patch

diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/Documentation/DocBook/Makefile linux-2.6.18-53.1.14.kgdb/Documentation/DocBook/Makefile
--- linux-2.6.18-53.1.14/Documentation/DocBook/Makefile 2008-03-06 05:54:50.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/Documentation/DocBook/Makefile    2008-06-10 15:37:25.000000000 +0400
@@ -11,7 +11,7 @@ DOCBOOKS := wanbook.xml z8530book.xml mc
            procfs-guide.xml writing_usb_driver.xml \
            kernel-api.xml journal-api.xml lsm.xml utrace.xml usb.xml \
            gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \
-           genericirq.xml
+           genericirq.xml kgdb.xml
 
 ###
 # The build process is as follows (targets):
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/Documentation/DocBook/kgdb.tmpl linux-2.6.18-53.1.14.kgdb/Documentation/DocBook/kgdb.tmpl
--- linux-2.6.18-53.1.14/Documentation/DocBook/kgdb.tmpl        1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/Documentation/DocBook/kgdb.tmpl   2008-06-10 15:38:50.000000000 +0400
@@ -0,0 +1,250 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
+       "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
+
+<book id="kgdbInternals">
+ <bookinfo>
+  <title>KGDB Internals</title>
+
+  <authorgroup>
+   <author>
+    <firstname>Tom</firstname>
+    <surname>Rini</surname>
+    <affiliation>
+     <address>
+      <email>trini@kernel.crashing.org</email>
+     </address>
+    </affiliation>
+   </author>
+  </authorgroup>
+
+  <authorgroup>
+   <author>
+    <firstname>Amit S.</firstname>
+    <surname>Kale</surname>
+    <affiliation>
+     <address>
+      <email>amitkale@linsyssoft.com</email>
+     </address>
+    </affiliation>
+   </author>
+  </authorgroup>
+
+  <copyright>
+   <year>2004-2005</year>
+   <holder>MontaVista Software, Inc.</holder>
+  </copyright>
+  <copyright>
+   <year>2004</year>
+   <holder>Amit S. Kale</holder>
+  </copyright>
+
+  <legalnotice>
+   <para>
+   This file is licensed under the terms of the GNU General Public License
+   version 2. This program is licensed "as is" without any warranty of any
+   kind, whether express or implied.
+   </para>
+
+  </legalnotice>
+ </bookinfo>
+
+<toc></toc>
+  <chapter id="Introduction">
+    <title>Introduction</title>
+    <para>
+    kgdb is a source level debugger for linux kernel. It is used along
+    with gdb to debug a linux kernel. Kernel developers can debug a kernel
+    similar to application programs with the use of kgdb. It makes it
+    possible to place breakpoints in kernel code, step through the code
+    and observe variables.
+    </para>
+    <para>
+    Two machines are required for using kgdb. One of these machines is a
+    development machine and the other is a test machine. The machines are
+    typically connected through a serial line, a null-modem cable which
+    connects their serial ports.  It is also possible however, to use an
+    ethernet connection between the machines.  The kernel to be debugged
+    runs on the test machine. gdb runs on the development machine. The
+    serial line or ethernet connection is used by gdb to communicate to
+    the kernel being debugged.
+    </para>
+  </chapter>
+  <chapter id="CompilingAKernel">
+    <title>Compiling a kernel</title>
+    <para>
+    To enable <symbol>CONFIG_KGDB</symbol>, look under the "Kernel debugging"
+    and then select "KGDB: kernel debugging with remote gdb".
+    </para>
+    <para>
+    The first choice for I/O is <symbol>CONFIG_KGDB_ONLY_MODULES</symbol>.
+    This means that you will only be able to use KGDB after loading a
+    kernel module that defines how you want to be able to talk with
+    KGDB.  There are two other choices (more on some architectures) that
+    can be enabled as modules later, if not picked here.
+    </para>
+    <para>The first of these is <symbol>CONFIG_KGDB_8250_NOMODULE</symbol>.
+    This has sub-options such as <symbol>CONFIG_KGDB_SIMPLE_SERIAL</symbol>
+    which toggles choosing the serial port by ttyS number or by specifying
+    a port and IRQ number.
+    </para>
+    <para>
+    The second of these choices on most systems for I/O is
+    <symbol>CONFIG_KGDBOE</symbol>. This requires that the machine to be
+    debugged has an ethernet card which supports the netpoll API, such as
+    the cards supported by <symbol>CONFIG_E100</symbol>.  There are no
+    sub-options for this, but a kernel command line option is required.
+    </para>
+  </chapter>
+  <chapter id="BootingTheKernel">
+    <title>Booting the kernel</title>
+    <para>
+    The Kernel command line option <constant>kgdbwait</constant> makes kgdb
+    wait for gdb connection during booting of a kernel.  If the
+    <symbol>CONFIG_KGDB_8250</symbol> driver is used (or if applicable,
+    another serial driver) this breakpoint will happen very early on, before
+    console output.  If you wish to change serial port information and you
+    have enabled both <symbol>CONFIG_KGDB_8250</symbol> and
+    <symbol>CONFIG_KGDB_SIMPLE_SERIAL</symbol> then you must pass the option
+    <constant>kgdb8250=&lt;io or mmio&gt;,&lt;address&gt;,&lt;baud
+    rate&gt;,&lt;irq&gt;</constant> before <constant>kgdbwait</constant>.
+    The values <constant>io</constant> or <constant>mmio</constant> refer to
+    if the address being passed next needs to be memory mapped
+    (<constant>mmio</constant>) or not. The <constant>address</constant> must
+    be passed in hex and is the hardware address and will be remapped if
+    passed as <constant>mmio</constant>. The value
+    <constant>baud rate</constant> and <constant>irq</constant> are base-10.
+    The supported values for <constant>baud rate</constant> are
+    <constant>9600</constant>, <constant>19200</constant>,
+    <constant>38400</constant>, <constant>57600</constant>, and
+    <constant>115200</constant>.
+    </para>
+    <para>
+    To have KGDB stop the kernel and wait, with the compiled values for the
+    serial driver, pass in: <constant>kgdbwait</constant>.
+    </para>
+    <para>
+    To specify the values of the SH SCI(F) serial port at boot:
+    <constant>kgdbsci=0,115200</constant>.
+    </para>
+    <para>
+    To specify the values of the serial port at boot:
+    <constant>kgdb8250=io,3f8,115200,3</constant>.
+    On IA64 this could also be:
+    <constant>kgdb8250=mmio,0xff5e0000,115200,74</constant>
+    And to have KGDB also stop the kernel and wait for GDB to connect, pass in
+    <constant>kgdbwait</constant> after this arguement.
+    </para>
+    <para>
+    To configure the <symbol>CONFIG_KGDBOE</symbol> driver, pass in
+    <constant>kgdboe=[src-port]@&lt;src-ip&gt;/[dev],[tgt-port]@&lt;tgt-ip&gt;/[tgt-macaddr]</constant>
+    where:
+    <itemizedlist>
+      <listitem><para>src-port (optional): source for UDP packets (defaults to <constant>6443</constant>)</para></listitem>
+      <listitem><para>src-ip: source IP to use (interface address)</para></listitem>
+      <listitem><para>dev (optional): network interface (<constant>eth0</constant>)</para></listitem>
+      <listitem><para>tgt-port (optional): port GDB will use (defaults to <constant>6442</constant>)</para></listitem>
+      <listitem><para>tgt-ip: IP address GDB will be connecting from</para></listitem>
+      <listitem><para>tgt-macaddr (optional): ethernet MAC address for logging agent (default is broadcast)</para></listitem>
+    </itemizedlist>
+    </para>
+    <para>
+    The <symbol>CONFIG_KGDBOE</symbol> driver can be reconfigured at run
+    time, if <symbol>CONFIG_SYSFS</symbol> and
+    <symbol>CONFIG_MODULES</symbol> by echo'ing a new config string to
+    <constant>/sys/module/kgdboe/parameter/kgdboe</constant>.  The
+    driver can be unconfigured with the special string
+    <constant>not_configured</constant>.
+    </para>
+  </chapter>
+  <chapter id="ConnectingGDB">
+  <title>Connecting gdb</title>
+    <para>
+    If you have used any of the methods to have KGDB stop and create
+    an initial breakpoint described in the previous chapter, kgdb prints
+    the message "Waiting for connection from remote gdb..." on the console
+    and waits for connection from gdb. At this point you connect gdb to kgdb.
+    </para>
+    <para>
+    Example (serial):
+    </para>
+    <programlisting>
+    % gdb ./vmlinux
+    (gdb) set remotebaud 115200
+    (gdb) target remote /dev/ttyS0
+    </programlisting>
+    <para>
+    Example (ethernet):
+    </para>
+    <programlisting>
+    % gdb ./vmlinux
+    (gdb) target remote udp:192.168.2.2:6443
+    </programlisting>
+    <para>
+    Once connected, you can debug a kernel the way you would debug an
+    application program.
+    </para>
+  </chapter>
+  <chapter id="ArchitectureNotes">
+    <title>Architecture specific notes</title>
+      <para>
+      SuperH: The NMI switch found on some boards can be used to trigger an
+      initial breakpoint.  Subsequent triggers do nothing.  If console
+      is enabled on the SCI(F) serial port, and that is the port being used
+      for KGDB, then you must trigger a breakpoint via sysrq, NMI, or
+      some other method prior to connecting, or echo a control-c to the
+      serial port.  Also, to use the SCI(F) port for KGDB, the
+      <symbol>CONFIG_SERIAL_SH_SCI</symbol> driver must be enabled.
+      </para>
+  </chapter>
+  <chapter id="CommonBackEndReq">
+    <title>The common backend (required)</title>
+      <para>
+      There are a few flags which must be set on every architecture in
+      their &lt;asm/kgdb.h&gt; file.  These are:
+      <itemizedlist>
+        <listitem>
+         <para>
+         NUMREGBYTES: The size in bytes of all of the registers, so
+         that we can ensure they will all fit into a packet.
+         </para>
+         <para>
+         BUFMAX: The size in bytes of the buffer GDB will read into.
+         This must be larger than NUMREGBYTES.
+         </para>
+         <para>
+         CACHE_FLUSH_IS_SAFE: Set to one if it always safe to call
+         flush_cache_range or flush_icache_range.  On some architectures,
+         these functions may not be safe to call on SMP since we keep other
+         CPUs in a holding pattern.
+         </para>
+       </listitem>
+      </itemizedlist>
+      </para>
+      <para>
+      There are also the following functions for the common backend,
+      found in kernel/kgdb.c that must be supplied by the
+      architecture-specific backend.  No weak version of these is provided.
+      </para>
+!Iinclude/linux/kgdb.h
+  </chapter>
+  <chapter id="CommonBackEndOpt">
+    <title>The common backend (optional)</title>
+      <para>
+      These functions are part of the common backend, found in kernel/kgdb.c
+      and are optionally implemented.  Some functions (with _hw_ in the name)
+      end up being required on arches which use hardware breakpoints.
+      </para>
+!Ikernel/kgdb.c
+  </chapter>
+  <chapter id="DriverSpecificFunctions">
+    <title>Driver-Specific Functions</title>
+      <para>
+      Some of the I/O drivers have additional functions that can be
+      called, that are specific to the driver.  Calls from other places
+      to these functions must be wrapped in #ifdefs for the driver in
+      question.
+      </para>
+!Idrivers/serial/8250_kgdb.c
+   </chapter>
+</book>
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/MAINTAINERS linux-2.6.18-53.1.14.kgdb/MAINTAINERS
--- linux-2.6.18-53.1.14/MAINTAINERS    2008-03-06 05:54:49.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/MAINTAINERS       2008-06-10 15:37:25.000000000 +0400
@@ -1715,6 +1715,15 @@ L:       linux-kernel@vger.kernel.org
 L:     fastboot@osdl.org
 S:     Maintained
 
+KGDB
+P:     Tom Rini
+P:     Amit S. Kale
+M:     trini@kernel.crashing.org
+M:     amitkale@linsyssoft.com
+W:     http://sourceforge.net/projects/kgdb
+L:     kgdb-bugreport@lists.sourceforge.net
+S:     Maintained
+
 KPROBES
 P:     Prasanna S Panchamukhi
 M:     prasanna@in.ibm.com
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/Makefile linux-2.6.18-53.1.14.kgdb/Makefile
--- linux-2.6.18-53.1.14/Makefile       2008-03-06 05:55:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/Makefile  2008-06-10 15:39:01.000000000 +0400
@@ -992,6 +992,7 @@ MRPROPER_DIRS  += include/config include
 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
                   include/linux/autoconf.h include/linux/version.h      \
                   include/linux/utsrelease.h                            \
+                 include/linux/dwarf2-defs.h                           \
                  Module.symvers tags TAGS cscope*
 
 # clean - Delete most, but leave enough to build external modules
@@ -1422,7 +1423,11 @@ clean := -f $(if $(KBUILD_SRC),$(srctree
 endif  # skip-makefile
 
 PHONY += FORCE
-FORCE:
+include/linux/dwarf2-defs.h: $(srctree)/include/linux/dwarf2.h $(srctree)/scripts/dwarfh.awk
+       mkdir -p include/linux/
+       awk -f $(srctree)/scripts/dwarfh.awk $(srctree)/include/linux/dwarf2.h > include/linux/dwarf2-defs.h
+
+FORCE: include/linux/dwarf2-defs.h
 
 
 # Declare the contents of the .PHONY variable as phony.  We keep that
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/kernel/Makefile linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/Makefile
--- linux-2.6.18-53.1.14/arch/arm/kernel/Makefile       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/Makefile  2008-06-10 15:38:56.000000000 +0400
@@ -20,6 +20,7 @@ obj-$(CONFIG_ISA_DMA)         += dma-isa.o
 obj-$(CONFIG_PCI)              += bios32.o isa.o
 obj-$(CONFIG_SMP)              += smp.o
 obj-$(CONFIG_OABI_COMPAT)      += sys_oabi-compat.o
+obj-$(CONFIG_KGDB)             += kgdb.o kgdb-jmp.o
 
 obj-$(CONFIG_CRUNCH)           += crunch.o crunch-bits.o
 AFLAGS_crunch-bits.o           := -Wa,-mcpu=ep9312
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/kernel/entry-armv.S linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/entry-armv.S
--- linux-2.6.18-53.1.14/arch/arm/kernel/entry-armv.S   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/entry-armv.S      2008-06-10 15:39:01.000000000 +0400
@@ -15,6 +15,7 @@
  *  it to save wrong values...  Be aware!
  */
 
+#include <asm/kgdb.h>
 #include <asm/memory.h>
 #include <asm/glue.h>
 #include <asm/vfpmacros.h>
@@ -232,6 +233,7 @@ svc_preempt:
        beq     preempt_return                  @ go again
        b       1b
 #endif
+       CFI_END_FRAME(__irq_svc)
 
        .align  5
 __und_svc:
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/kernel/kgdb-jmp.S linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/kgdb-jmp.S
--- linux-2.6.18-53.1.14/arch/arm/kernel/kgdb-jmp.S     1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/kgdb-jmp.S        2008-06-10 15:38:56.000000000 +0400
@@ -0,0 +1,32 @@
+/*
+ * arch/arm/kernel/kgdb-jmp.S
+ *
+ * Trivial setjmp and longjmp procedures to support bus error recovery
+ * which may occur during kgdb memory read/write operations.
+ *
+ * Author: MontaVista Software, Inc. <source@mvista.com>
+ *         source@mvista.com
+ *
+ * 2002-2005 (c) MontaVista Software, Inc.  This file is licensed under the
+ * terms of the GNU General Public License version 2. This program as licensed
+ * "as is" without any warranty of any kind, whether express or implied.
+ */
+#include <linux/linkage.h>
+
+ENTRY (kgdb_fault_setjmp)
+       /* Save registers */
+       stmia   r0, {r0-r14}
+       str     lr,[r0, #60]
+       mrs     r1,cpsr
+       str     r1,[r0,#64]
+       ldr     r1,[r0,#4]
+       mov     r0, #0
+       mov     pc,lr
+
+ENTRY (kgdb_fault_longjmp)
+       /* Restore registers */
+       mov     r1,#1
+       str     r1,[r0]
+       ldr     r1,[r0, #64]
+       msr     spsr,r1
+       ldmia   r0,{r0-pc}^
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/kernel/kgdb.c linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/kgdb.c
--- linux-2.6.18-53.1.14/arch/arm/kernel/kgdb.c 1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/kgdb.c    2008-06-10 15:38:56.000000000 +0400
@@ -0,0 +1,208 @@
+/*
+ * arch/arm/kernel/kgdb.c
+ *
+ * ARM KGDB support
+ *
+ * Copyright (c) 2002-2004 MontaVista Software, Inc
+ *
+ * Authors:  George Davis <davis_g@mvista.com>
+ *           Deepak Saxena <dsaxena@plexity.net>
+ */
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/spinlock.h>
+#include <linux/personality.h>
+#include <linux/ptrace.h>
+#include <linux/elf.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/kgdb.h>
+
+#include <asm/atomic.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+#include <asm/ptrace.h>
+#include <asm/traps.h>
+
+/* Make a local copy of the registers passed into the handler (bletch) */
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *kernel_regs)
+{
+       int regno;
+
+       /* Initialize all to zero (??) */
+       for (regno = 0; regno < GDB_MAX_REGS; regno++)
+               gdb_regs[regno] = 0;
+
+       gdb_regs[_R0] = kernel_regs->ARM_r0;
+       gdb_regs[_R1] = kernel_regs->ARM_r1;
+       gdb_regs[_R2] = kernel_regs->ARM_r2;
+       gdb_regs[_R3] = kernel_regs->ARM_r3;
+       gdb_regs[_R4] = kernel_regs->ARM_r4;
+       gdb_regs[_R5] = kernel_regs->ARM_r5;
+       gdb_regs[_R6] = kernel_regs->ARM_r6;
+       gdb_regs[_R7] = kernel_regs->ARM_r7;
+       gdb_regs[_R8] = kernel_regs->ARM_r8;
+       gdb_regs[_R9] = kernel_regs->ARM_r9;
+       gdb_regs[_R10] = kernel_regs->ARM_r10;
+       gdb_regs[_FP] = kernel_regs->ARM_fp;
+       gdb_regs[_IP] = kernel_regs->ARM_ip;
+       gdb_regs[_SP] = kernel_regs->ARM_sp;
+       gdb_regs[_LR] = kernel_regs->ARM_lr;
+       gdb_regs[_PC] = kernel_regs->ARM_pc;
+       gdb_regs[_CPSR] = kernel_regs->ARM_cpsr;
+}
+
+/* Copy local gdb registers back to kgdb regs, for later copy to kernel */
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *kernel_regs)
+{
+       kernel_regs->ARM_r0 = gdb_regs[_R0];
+       kernel_regs->ARM_r1 = gdb_regs[_R1];
+       kernel_regs->ARM_r2 = gdb_regs[_R2];
+       kernel_regs->ARM_r3 = gdb_regs[_R3];
+       kernel_regs->ARM_r4 = gdb_regs[_R4];
+       kernel_regs->ARM_r5 = gdb_regs[_R5];
+       kernel_regs->ARM_r6 = gdb_regs[_R6];
+       kernel_regs->ARM_r7 = gdb_regs[_R7];
+       kernel_regs->ARM_r8 = gdb_regs[_R8];
+       kernel_regs->ARM_r9 = gdb_regs[_R9];
+       kernel_regs->ARM_r10 = gdb_regs[_R10];
+       kernel_regs->ARM_fp = gdb_regs[_FP];
+       kernel_regs->ARM_ip = gdb_regs[_IP];
+       kernel_regs->ARM_sp = gdb_regs[_SP];
+       kernel_regs->ARM_lr = gdb_regs[_LR];
+       kernel_regs->ARM_pc = gdb_regs[_PC];
+       kernel_regs->ARM_cpsr = gdb_regs[GDB_MAX_REGS - 1];
+}
+
+static inline struct pt_regs *kgdb_get_user_regs(struct task_struct *task)
+{
+       return (struct pt_regs *)
+           ((unsigned long)task->thread_info + THREAD_SIZE -
+            8 - sizeof(struct pt_regs));
+}
+
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs,
+                                struct task_struct *task)
+{
+       int regno;
+       struct pt_regs *thread_regs;
+
+       /* Just making sure... */
+       if (task == NULL)
+               return;
+
+       /* Initialize to zero */
+       for (regno = 0; regno < GDB_MAX_REGS; regno++)
+               gdb_regs[regno] = 0;
+
+       /* Otherwise, we have only some registers from switch_to() */
+       thread_regs = kgdb_get_user_regs(task);
+       gdb_regs[_R0] = thread_regs->ARM_r0;    /* Not really valid? */
+       gdb_regs[_R1] = thread_regs->ARM_r1;    /* "               " */
+       gdb_regs[_R2] = thread_regs->ARM_r2;    /* "               " */
+       gdb_regs[_R3] = thread_regs->ARM_r3;    /* "               " */
+       gdb_regs[_R4] = thread_regs->ARM_r4;
+       gdb_regs[_R5] = thread_regs->ARM_r5;
+       gdb_regs[_R6] = thread_regs->ARM_r6;
+       gdb_regs[_R7] = thread_regs->ARM_r7;
+       gdb_regs[_R8] = thread_regs->ARM_r8;
+       gdb_regs[_R9] = thread_regs->ARM_r9;
+       gdb_regs[_R10] = thread_regs->ARM_r10;
+       gdb_regs[_FP] = thread_regs->ARM_fp;
+       gdb_regs[_IP] = thread_regs->ARM_ip;
+       gdb_regs[_SP] = thread_regs->ARM_sp;
+       gdb_regs[_LR] = thread_regs->ARM_lr;
+       gdb_regs[_PC] = thread_regs->ARM_pc;
+       gdb_regs[_CPSR] = thread_regs->ARM_cpsr;
+}
+
+static int compiled_break;
+
+int kgdb_arch_handle_exception(int exception_vector, int signo,
+                              int err_code, char *remcom_in_buffer,
+                              char *remcom_out_buffer,
+                              struct pt_regs *linux_regs)
+{
+       long addr;
+       char *ptr;
+
+       switch (remcom_in_buffer[0]) {
+       case 'c':
+               kgdb_contthread = NULL;
+
+               /*
+                * Try to read optional parameter, pc unchanged if no parm.
+                * If this was a compiled breakpoint, we need to move
+                * to the next instruction or we will just breakpoint
+                * over and over again.
+                */
+               ptr = &remcom_in_buffer[1];
+               if (kgdb_hex2long(&ptr, &addr)) {
+                       linux_regs->ARM_pc = addr;
+               } else if (compiled_break == 1) {
+                       linux_regs->ARM_pc += 4;
+               }
+
+               compiled_break = 0;
+
+               return 0;
+       }
+
+       return -1;
+}
+
+static int kgdb_brk_fn(struct pt_regs *regs, unsigned int instr)
+{
+       kgdb_handle_exception(1, SIGTRAP, 0, regs);
+
+       return 0;
+}
+
+static int kgdb_compiled_brk_fn(struct pt_regs *regs, unsigned int instr)
+{
+       compiled_break = 1;
+       kgdb_handle_exception(1, SIGTRAP, 0, regs);
+
+       return 0;
+}
+
+static struct undef_hook kgdb_brkpt_hook = {
+       .instr_mask = 0xffffffff,
+       .instr_val = KGDB_BREAKINST,
+       .fn = kgdb_brk_fn
+};
+
+static struct undef_hook kgdb_compiled_brkpt_hook = {
+       .instr_mask = 0xffffffff,
+       .instr_val = KGDB_COMPILED_BREAK,
+       .fn = kgdb_compiled_brk_fn
+};
+
+/*
+ * Register our undef instruction hooks with ARM undef core.
+ * We regsiter a hook specifically looking for the KGB break inst
+ * and we handle the normal undef case within the do_undefinstr
+ * handler.
+ */
+int kgdb_arch_init(void)
+{
+       register_undef_hook(&kgdb_brkpt_hook);
+       register_undef_hook(&kgdb_compiled_brkpt_hook);
+
+       return 0;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+#ifndef __ARMEB__
+       .gdb_bpt_instr = {0xfe, 0xde, 0xff, 0xe7}
+#else
+       .gdb_bpt_instr = {0xe7, 0xff, 0xde, 0xfe}
+#endif
+};
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/kernel/setup.c linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/setup.c
--- linux-2.6.18-53.1.14/arch/arm/kernel/setup.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/setup.c   2008-06-10 15:38:56.000000000 +0400
@@ -829,6 +829,11 @@ void __init setup_arch(char **cmdline_p)
        conswitchp = &dummy_con;
 #endif
 #endif
+
+#if    defined(CONFIG_KGDB)
+       extern void __init early_trap_init(void);
+       early_trap_init();
+#endif
 }
 
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/kernel/traps.c linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/traps.c
--- linux-2.6.18-53.1.14/arch/arm/kernel/traps.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/kernel/traps.c   2008-06-10 15:38:56.000000000 +0400
@@ -278,6 +278,7 @@ asmlinkage void do_undefinstr(struct pt_
        unsigned int instr;
        struct undef_hook *hook;
        siginfo_t info;
+       mm_segment_t fs;
        void __user *pc;
 
        /*
@@ -287,12 +288,15 @@ asmlinkage void do_undefinstr(struct pt_
         */
        regs->ARM_pc -= correction;
 
+       fs = get_fs();
+       set_fs(KERNEL_DS);
        pc = (void __user *)instruction_pointer(regs);
        if (thumb_mode(regs)) {
                get_user(instr, (u16 __user *)pc);
        } else {
                get_user(instr, (u32 __user *)pc);
        }
+       set_fs(fs);
 
        spin_lock_irq(&undef_lock);
        list_for_each_entry(hook, &undef_hook, node) {
@@ -684,6 +688,13 @@ EXPORT_SYMBOL(abort);
 
 void __init trap_init(void)
 {
+#if   defined(CONFIG_KGDB)
+       return;
+}
+
+void __init early_trap_init(void)
+{
+#endif
        unsigned long vectors = CONFIG_VECTORS_BASE;
        extern char __stubs_start[], __stubs_end[];
        extern char __vectors_start[], __vectors_end[];
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/mach-ixp2000/core.c linux-2.6.18-53.1.14.kgdb/arch/arm/mach-ixp2000/core.c
--- linux-2.6.18-53.1.14/arch/arm/mach-ixp2000/core.c   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/mach-ixp2000/core.c      2008-06-10 15:38:56.000000000 +0400
@@ -34,6 +34,7 @@
 #include <asm/system.h>
 #include <asm/tlbflush.h>
 #include <asm/pgtable.h>
+#include <asm/kgdb.h>
 
 #include <asm/mach/map.h>
 #include <asm/mach/time.h>
@@ -184,6 +185,9 @@ static struct platform_device ixp2000_se
 void __init ixp2000_uart_init(void)
 {
        platform_device_register(&ixp2000_serial_device);
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &ixp2000_serial_port);
+#endif
 }
 
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/mach-ixp2000/ixdp2x01.c linux-2.6.18-53.1.14.kgdb/arch/arm/mach-ixp2000/ixdp2x01.c
--- linux-2.6.18-53.1.14/arch/arm/mach-ixp2000/ixdp2x01.c       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/mach-ixp2000/ixdp2x01.c  2008-06-10 15:38:56.000000000 +0400
@@ -38,6 +38,7 @@
 #include <asm/system.h>
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
+#include <asm/kgdb.h>
 
 #include <asm/mach/pci.h>
 #include <asm/mach/map.h>
@@ -413,6 +414,11 @@ static void __init ixdp2x01_init_machine
        platform_add_devices(ixdp2x01_devices, ARRAY_SIZE(ixdp2x01_devices));
        ixp2000_uart_init();
        ixdp2x01_uart_init();
+
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &ixdp425_serial_ports[0]);
+       kgdb8250_add_port(1, &ixdp425_serial_ports[1]);
+#endif
 }
 
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/mach-ixp4xx/coyote-setup.c linux-2.6.18-53.1.14.kgdb/arch/arm/mach-ixp4xx/coyote-setup.c
--- linux-2.6.18-53.1.14/arch/arm/mach-ixp4xx/coyote-setup.c    2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/mach-ixp4xx/coyote-setup.c       2008-06-10 15:38:56.000000000 +0400
@@ -96,6 +96,10 @@ static void __init coyote_init(void)
        }
 
        platform_add_devices(coyote_devices, ARRAY_SIZE(coyote_devices));
+
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &coyote_serial_port);
+#endif
 }
 
 #ifdef CONFIG_ARCH_ADI_COYOTE
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/mach-ixp4xx/ixdp425-setup.c linux-2.6.18-53.1.14.kgdb/arch/arm/mach-ixp4xx/ixdp425-setup.c
--- linux-2.6.18-53.1.14/arch/arm/mach-ixp4xx/ixdp425-setup.c   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/mach-ixp4xx/ixdp425-setup.c      2008-06-10 15:38:56.000000000 +0400
@@ -24,6 +24,7 @@
 #include <asm/irq.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/flash.h>
+#include <asm/kgdb.h>
 
 static struct flash_platform_data ixdp425_flash_data = {
        .map_name       = "cfi_probe",
@@ -76,7 +77,8 @@ static struct plat_serial8250_port ixdp4
                .mapbase        = IXP4XX_UART1_BASE_PHYS,
                .membase        = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
                .irq            = IRQ_IXP4XX_UART1,
-               .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+               .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+                                       UPF_SHARE_IRQ,
                .iotype         = UPIO_MEM,
                .regshift       = 2,
                .uartclk        = IXP4XX_UART_XTAL,
@@ -85,7 +87,8 @@ static struct plat_serial8250_port ixdp4
                .mapbase        = IXP4XX_UART2_BASE_PHYS,
                .membase        = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
                .irq            = IRQ_IXP4XX_UART2,
-               .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+               .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST |
+                                       UPF_SHARE_IRQ,
                .iotype         = UPIO_MEM,
                .regshift       = 2,
                .uartclk        = IXP4XX_UART_XTAL,
@@ -116,6 +119,11 @@ static void __init ixdp425_init(void)
                IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 
        platform_add_devices(ixdp425_devices, ARRAY_SIZE(ixdp425_devices));
+
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &ixdp425_serial_ports[0]);
+       kgdb8250_add_port(1, &ixdp425_serial_ports[1]);
+#endif
 }
 
 #ifdef CONFIG_ARCH_IXDP425
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/mach-omap1/serial.c linux-2.6.18-53.1.14.kgdb/arch/arm/mach-omap1/serial.c
--- linux-2.6.18-53.1.14/arch/arm/mach-omap1/serial.c   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/mach-omap1/serial.c      2008-06-10 15:38:56.000000000 +0400
@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/serial.h>
 #include <linux/tty.h>
+#include <linux/kgdb.h>
 #include <linux/serial_8250.h>
 #include <linux/serial_reg.h>
 #include <linux/clk.h>
@@ -199,6 +200,9 @@ void __init omap_serial_init(void)
                        break;
                }
                omap_serial_reset(&serial_platform_data[i]);
+#ifdef CONFIG_KGDB_8250
+               kgdb8250_add_platform_port(i, &serial_platform_data[i]);
+#endif
        }
 }
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/mach-pxa/Makefile linux-2.6.18-53.1.14.kgdb/arch/arm/mach-pxa/Makefile
--- linux-2.6.18-53.1.14/arch/arm/mach-pxa/Makefile     2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/mach-pxa/Makefile        2008-06-10 15:38:56.000000000 +0400
@@ -31,6 +31,7 @@ obj-$(CONFIG_LEDS) += $(led-y)
 # Misc features
 obj-$(CONFIG_PM) += pm.o sleep.o
 obj-$(CONFIG_PXA_SSP) += ssp.o
+obj-$(CONFIG_KGDB_PXA_SERIAL) += kgdb-serial.o
 
 ifeq ($(CONFIG_PXA27x),y)
 obj-$(CONFIG_PM) += standby.o
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/mach-pxa/kgdb-serial.c linux-2.6.18-53.1.14.kgdb/arch/arm/mach-pxa/kgdb-serial.c
--- linux-2.6.18-53.1.14/arch/arm/mach-pxa/kgdb-serial.c        1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/mach-pxa/kgdb-serial.c   2008-06-10 15:38:56.000000000 +0400
@@ -0,0 +1,98 @@
+/*
+ * linux/arch/arm/mach-pxa/kgdb-serial.c
+ *
+ * Provides low level kgdb serial support hooks for PXA2xx boards
+ *
+ * Author:     Nicolas Pitre
+ * Copyright:  (C) 2002-2005 MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+#include <linux/serial_reg.h>
+#include <linux/kgdb.h>
+#include <asm/processor.h>
+#include <asm/hardware.h>
+#include <asm/arch/pxa-regs.h>
+
+#if   defined(CONFIG_KGDB_PXA_FFUART)
+
+#define UART           FFUART
+#define CKEN_UART      CKEN6_FFUART
+#define GPIO_RX_MD     GPIO34_FFRXD_MD
+#define GPIO_TX_MD     GPIO39_FFTXD_MD
+
+#elif defined(CONFIG_KGDB_PXA_BTUART)
+
+#define UART           BTUART
+#define CKEN_UART      CKEN7_BTUART
+#define GPIO_RX_MD     GPIO42_BTRXD_MD
+#define GPIO_TX_MD     GPIO43_BTTXD_MD
+
+#elif defined(CONFIG_KGDB_PXA_STUART)
+
+#define UART           STUART
+#define CKEN_UART      CKEN5_STUART
+#define GPIO_RX_MD     GPIO46_STRXD_MD
+#define GPIO_TX_MD     GPIO47_STTXD_MD
+
+#endif
+
+#define UART_BAUDRATE  (CONFIG_KGDB_BAUDRATE)
+
+static volatile unsigned long *port = (unsigned long *)&UART;
+
+static int kgdb_serial_init(void)
+{
+       pxa_set_cken(CKEN_UART, 1);
+       pxa_gpio_mode(GPIO_RX_MD);
+       pxa_gpio_mode(GPIO_TX_MD);
+
+       port[UART_IER] = 0;
+       port[UART_LCR] = LCR_DLAB;
+       port[UART_DLL] = ((921600 / UART_BAUDRATE) & 0xff);
+       port[UART_DLM] = ((921600 / UART_BAUDRATE) >> 8);
+       port[UART_LCR] = LCR_WLS1 | LCR_WLS0;
+       port[UART_MCR] = 0;
+       port[UART_IER] = IER_UUE;
+       port[UART_FCR] = FCR_ITL_16;
+
+       return 0;
+}
+
+static void kgdb_serial_putchar(int c)
+{
+       if (!(CKEN & CKEN_UART) || port[UART_IER] != IER_UUE)
+               kgdb_serial_init();
+       while (!(port[UART_LSR] & LSR_TDRQ))
+               cpu_relax();
+       port[UART_TX] = c;
+}
+
+static void kgdb_serial_flush(void)
+{
+       if ((CKEN & CKEN_UART) && (port[UART_IER] & IER_UUE))
+               while (!(port[UART_LSR] & LSR_TEMT))
+                       cpu_relax();
+}
+
+static int kgdb_serial_getchar(void)
+{
+       unsigned char c;
+       if (!(CKEN & CKEN_UART) || port[UART_IER] != IER_UUE)
+               kgdb_serial_init();
+       while (!(port[UART_LSR] & UART_LSR_DR))
+               cpu_relax();
+       c = port[UART_RX];
+       return c;
+}
+
+struct kgdb_io kgdb_io_ops = {
+       .init = kgdb_serial_init,
+       .write_char = kgdb_serial_putchar,
+       .flush = kgdb_serial_flush,
+       .read_char = kgdb_serial_getchar,
+};
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/mach-versatile/kgdb_serial.c linux-2.6.18-53.1.14.kgdb/arch/arm/mach-versatile/kgdb_serial.c
--- linux-2.6.18-53.1.14/arch/arm/mach-versatile/kgdb_serial.c  1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/mach-versatile/kgdb_serial.c     2008-06-10 15:38:56.000000000 +0400
@@ -0,0 +1,121 @@
+/*
+ * arch/arm/mach-versatile/kgdb_serial.c
+ *
+ * Author: Manish Lachwani, mlachwani@mvista.com
+ *
+ * 2005 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ *
+ * Support for KGDB on ARM Versatile.
+ */
+#include <linux/config.h>
+#include <linux/serial_reg.h>
+#include <linux/kgdb.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/hardware.h>
+#include <asm/hardware/amba_serial.h>
+#include <asm/arch-versatile/hardware.h>
+
+#define ARM_BAUD_38400         23
+/*
+ * Functions that will be used later
+ */
+#define UART_GET_INT_STATUS(p) readb((p) + UART010_IIR)
+#define UART_GET_MIS(p)                readw((p) + UART011_MIS)
+#define UART_PUT_ICR(p, c)     writel((c), (p) + UART010_ICR)
+#define UART_GET_FR(p)         readb((p) + UART01x_FR)
+#define UART_GET_CHAR(p)       readb((p) + UART01x_DR)
+#define UART_PUT_CHAR(p, c)     writel((c), (p) + UART01x_DR)
+#define UART_GET_RSR(p)                readb((p) + UART01x_RSR)
+#define UART_GET_CR(p)         readb((p) + UART010_CR)
+#define UART_PUT_CR(p,c)        writel((c), (p) + UART010_CR)
+#define UART_GET_LCRL(p)       readb((p) + UART010_LCRL)
+#define UART_PUT_LCRL(p,c)     writel((c), (p) + UART010_LCRL)
+#define UART_GET_LCRM(p)        readb((p) + UART010_LCRM)
+#define UART_PUT_LCRM(p,c)     writel((c), (p) + UART010_LCRM)
+#define UART_GET_LCRH(p)       readb((p) + UART010_LCRH)
+#define UART_PUT_LCRH(p,c)     writel((c), (p) + UART010_LCRH)
+#define UART_RX_DATA(s)                (((s) & UART01x_FR_RXFE) == 0)
+#define UART_TX_READY(s)       (((s) & UART01x_FR_TXFF) == 0)
+#define UART_TX_EMPTY(p)       ((UART_GET_FR(p) & UART01x_FR_TMSK) == 0)
+
+/*
+ * KGDB IRQ
+ */
+static int kgdb_irq = 12;
+static volatile unsigned char *port = NULL;
+
+static int kgdb_serial_init(void)
+{
+       int rate = ARM_BAUD_38400;
+
+       port = IO_ADDRESS(0x101F1000);
+       UART_PUT_CR(port, 0);
+
+       /* Set baud rate */
+       UART_PUT_LCRM(port, ((rate & 0xf00) >> 8));
+       UART_PUT_LCRL(port, (rate & 0xff));
+       UART_PUT_LCRH(port, UART01x_LCRH_WLEN_8 | UART01x_LCRH_FEN);
+       UART_PUT_CR(port, UART01x_CR_UARTEN);
+
+       return 0;
+}
+
+static void kgdb_serial_putchar(int ch)
+{
+       unsigned int status;
+
+       do {
+               status = UART_GET_FR(port);
+       } while (!UART_TX_READY(status));
+
+       UART_PUT_CHAR(port, ch);
+}
+
+static int kgdb_serial_getchar(void)
+{
+       unsigned int status;
+       int ch;
+
+       do {
+               status = UART_GET_FR(port);
+       } while (!UART_RX_DATA(status));
+       ch = UART_GET_CHAR(port);
+       return ch;
+}
+
+static struct uart_port kgdb_amba_port = {
+       .irq = 12,
+       .iobase = 0,
+       .iotype = UPIO_MEM,
+       .membase = (unsigned char *)IO_ADDRESS(0x101F1000),
+};
+
+static irqreturn_t kgdb_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+       int status = UART_GET_MIS(port);
+
+       if (irq != kgdb_irq)
+               return IRQ_NONE;
+
+       if (status & 0x40)
+               breakpoint();
+
+       return IRQ_HANDLED;
+}
+
+static void __init kgdb_hookup_irq(void)
+{
+       request_irq(kgdb_irq, kgdb_interrupt, SA_SHIRQ, "GDB-stub",
+                   &kgdb_amba_port);
+}
+
+struct kgdb_io kgdb_io_ops = {
+       .init = kgdb_serial_init,
+       .write_char = kgdb_serial_putchar,
+       .read_char = kgdb_serial_getchar,
+       .late_init = kgdb_hookup_irq,
+};
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/arm/mm/extable.c linux-2.6.18-53.1.14.kgdb/arch/arm/mm/extable.c
--- linux-2.6.18-53.1.14/arch/arm/mm/extable.c  2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/arm/mm/extable.c     2008-06-10 15:38:56.000000000 +0400
@@ -2,6 +2,7 @@
  *  linux/arch/arm/mm/extable.c
  */
 #include <linux/module.h>
+#include <linux/kgdb.h>
 #include <asm/uaccess.h>
 
 int fixup_exception(struct pt_regs *regs)
@@ -11,6 +12,12 @@ int fixup_exception(struct pt_regs *regs
        fixup = search_exception_tables(instruction_pointer(regs));
        if (fixup)
                regs->ARM_pc = fixup->fixup;
+#ifdef CONFIG_KGDB
+       if (atomic_read(&debugger_active) && kgdb_may_fault)
+               /* Restore our previous state. */
+               kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+               /* Not reached. */
+#endif
 
        return fixup != NULL;
 }
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/i386/kernel/Makefile linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/Makefile
--- linux-2.6.18-53.1.14/arch/i386/kernel/Makefile      2008-03-06 05:54:14.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/Makefile 2008-06-10 15:38:03.000000000 +0400
@@ -39,6 +39,7 @@ obj-$(CONFIG_VM86)            += vm86.o
 obj-$(CONFIG_EARLY_PRINTK)     += early_printk.o
 obj-$(CONFIG_HPET_TIMER)       += hpet.o
 obj-$(CONFIG_K8_NB)            += k8.o
+obj-$(CONFIG_KGDB)             += kgdb.o kgdb-jmp.o
 
 EXTRA_AFLAGS   := -traditional
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/i386/kernel/entry.S linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/entry.S
--- linux-2.6.18-53.1.14/arch/i386/kernel/entry.S       2008-03-06 05:55:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/entry.S  2008-06-10 15:39:01.000000000 +0400
@@ -201,7 +201,7 @@ VM_MASK             = 0x00020000
        CFI_OFFSET ecx, ECX-OLDESP;\
        CFI_OFFSET ebx, EBX-OLDESP
 
-ENTRY(ret_from_fork)
+KPROBE_ENTRY(ret_from_fork)
        CFI_STARTPROC
        pushl %eax
        CFI_ADJUST_CFA_OFFSET 4
@@ -659,7 +659,7 @@ ENTRY(simd_coprocessor_error)
        jmp error_code
        CFI_ENDPROC
 
-ENTRY(device_not_available)
+KPROBE_ENTRY(device_not_available)
        RING0_INT_FRAME
        pushl $-1                       # mark this as an int
        CFI_ADJUST_CFA_OFFSET 4
@@ -916,7 +916,7 @@ ENTRY(machine_check)
        CFI_ENDPROC
 #endif
 
-ENTRY(spurious_interrupt_bug)
+KPROBE_ENTRY(spurious_interrupt_bug)
        RING0_INT_FRAME
        pushl $0
        CFI_ADJUST_CFA_OFFSET 4
@@ -942,3 +942,108 @@ ENDPROC(kernel_thread_helper)
 #include "syscall_table.S"
 
 syscall_table_size=(.-sys_call_table)
+
+#      Here we do call frames.  We cheat a bit as we only really need
+#      correct frames at locations we can actually look at from a
+#      debugger.  Since the break instruction trap actually goes thru
+#      some of this code, we don't really need info on those areas, but
+#      only after the fact.  I.e. if we can not step or break in a
+#      location or end up with a return address pointing at the
+#      location, we don't need a correct call frame for it.
+
+#ifdef CONFIG_KGDB
+
+#include <linux/dwarf2-lang.h>
+/*
+ * The register numbers as known by gdb
+ */
+
+#define _EAX 0
+#define _ECX 1
+#define _EDX 2
+#define _EBX 3
+#define _ESP 4
+#define _EBP 5
+#define _ESI 6
+#define _EDI 7
+#define _PC  8
+#define _EIP 8
+#define _PS  9
+#define _EFLAGS  9
+#define _CS 10
+#define _SS 11
+#define _DS 12
+#define _ES 13
+#define _FS 14
+#define _GS 15
+       /*
+        * This code uses macros defined in linux/dwarf2-lang.h
+        * They attempt to follow the dwarf2 naming conventions... sort of..
+        */
+ENTRY(end_of_stack_stop_unwind_function)
+       .long   end_of_stack_stop_unwind_function+1
+
+       .text
+
+       CFI_preamble(c1,_PC,1,1)
+       CFA_define_reference(_ESP,OLDESP)       /* Stack pointer */
+       CFA_expression(_EIP)
+          CFA_exp_OP_dup                       /* copy old esp */
+          CFA_exp_OP_consts(CS-OLDESP)         /* offset to CS address */
+          CFA_exp_OP_plus                      /* should be CS address */
+          CFA_exp_OP_deref                     /* get the CS */
+          CFA_exp_OP_const4s(VM_MASK|3)        /* prepare to mask it */
+          CFA_exp_OP_and                       /* mask it, zero means kernel */
+          CFA_exp_OP_bra(eip_user_rtn)         /* branch if user */
+          CFA_exp_OP_const4s(EIP-OLDESP)       /* offset to return address */
+          CFA_exp_OP_plus                      /* add that in */
+          CFA_exp_OP_skip(eip_end)             /* done if kernel, skip out */
+eip_user_rtn:
+          CFA_exp_OP_addr(end_of_stack_stop_unwind_function)/*dummy function */
+eip_end:
+          CFA_expression_end
+       CFA_define_offset(_EBX,EBX-OLDESP)
+       CFA_define_offset(_ECX,ECX-OLDESP)
+       CFA_define_offset(_EDX,EDX-OLDESP)
+       CFA_define_offset(_ESI,ESI-OLDESP)
+       CFA_define_offset(_EDI,EDI-OLDESP)
+       CFA_define_offset(_EBP,EBP-OLDESP)
+       CFA_define_offset(_EAX,EAX-OLDESP)
+       CFA_define_offset(_EFLAGS,EFLAGS-OLDESP)
+       CFI_postamble()
+
+/*
+ * This provides an uwind for our dummy end of unwind function.
+ * Current convention is to provied an undefined return address.
+ */
+       CFI_preamble(c2,_PC,1,1)
+       CFA_define_reference(_ESP,0)    /* Stack pointer */
+       CFA_undefine_reg(_EIP)
+       CFI_postamble()
+
+       FDE_preamble(c2,end_of_stack_stop_unwind_function,      \
+                       end_of_stack_stop_unwind_function+5)
+       FDE_postamble()
+       /*
+         * This is VERY sloppy.  At this point all we want to do is get
+         * the frame right for back tracing.  It will not be good if
+         * you try to single step.  We use already defined labels.
+         * We want to cover all call outs.
+         * We could also recode this as just one FDE, but this works and
+         * I want to get it out.
+        */
+       FDE_preamble(c1,ret_from_fork,ret_from_exception)
+       CFA_define_cfa_offset(4)                /* one extra word on stack */
+       FDE_postamble()
+
+       FDE_preamble(c1,ret_from_exception,device_not_available_emulate)
+       FDE_postamble()
+
+               FDE_preamble(c1,device_not_available_emulate,debug)
+       CFA_define_cfa_offset(4)                /* one extra word on stack */
+       FDE_postamble()
+
+       FDE_preamble(c1, debug,spurious_interrupt_bug)
+       FDE_postamble()
+
+#endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/i386/kernel/head.S linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/head.S
--- linux-2.6.18-53.1.14/arch/i386/kernel/head.S        2008-03-06 05:54:34.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/head.S   2008-06-10 15:39:01.000000000 +0400
@@ -10,6 +10,7 @@
 .text
 #include <linux/threads.h>
 #include <linux/linkage.h>
+#include <asm/kgdb.h>
 #include <asm/segment.h>
 #include <asm/page.h>
 #include <asm/pgtable.h>
@@ -336,6 +337,10 @@ is386:     movl $2,%ecx            # set MP
 #endif /* CONFIG_SMP */
        jmp start_kernel
 
+       /* This dwarf code tells gdb that this is the end of the unwind */
+       /* This uses the CFA set up for pc=1 located in entry.S */
+       CFI_END_FRAME(is386)
+
 /*
  * We depend on ET to be correct. This checks for 287/387.
  */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/i386/kernel/kgdb-jmp.S linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/kgdb-jmp.S
--- linux-2.6.18-53.1.14/arch/i386/kernel/kgdb-jmp.S    1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/kgdb-jmp.S       2008-06-10 15:38:03.000000000 +0400
@@ -0,0 +1,74 @@
+/*
+ * arch/i386/kernel/kgdb-jmp.S
+ *
+ * Save and restore system registers so that within a limited frame we
+ * may have a fault and "jump back" to a known safe location.
+ *
+ * Author: George Anzinger <george@mvista.com>
+ *
+ * Cribbed from glibc, which carries the following:
+ * Copyright (C) 1996, 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
+ * Copyright (C) 2005 by MontaVista Software.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program as licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include <linux/linkage.h>
+
+#define PCOFF          0
+#define LINKAGE                4               /* just the return address */
+#define PTR_SIZE       4
+#define PARMS          LINKAGE         /* no space for saved regs */
+#define JMPBUF         PARMS
+#define VAL            JMPBUF+PTR_SIZE
+
+#define JB_BX          0
+#define JB_SI          1
+#define JB_DI          2
+#define JB_BP          3
+#define JB_SP          4
+#define JB_PC          5
+
+/* This must be called prior to kgdb_fault_longjmp and
+ * kgdb_fault_longjmp must not be called outside of the context of the
+ * last call to kgdb_fault_setjmp.
+ * kgdb_fault_setjmp(int *jmp_buf[6])
+ */
+ENTRY(kgdb_fault_setjmp)
+       movl JMPBUF(%esp), %eax
+
+       /* Save registers.  */
+       movl    %ebx, (JB_BX*4)(%eax)
+       movl    %esi, (JB_SI*4)(%eax)
+       movl    %edi, (JB_DI*4)(%eax)
+       /* Save SP as it will be after we return.  */
+       leal    JMPBUF(%esp), %ecx
+       movl    %ecx, (JB_SP*4)(%eax)
+       movl    PCOFF(%esp), %ecx       /* Save PC we are returning to now.  */
+       movl    %ecx, (JB_PC*4)(%eax)
+       movl    %ebp, (JB_BP*4)(%eax)   /* Save caller's frame pointer.  */
+
+       /* Restore state so we can now try the access. */
+       movl    JMPBUF(%esp), %ecx      /* User's jmp_buf in %ecx.  */
+       /* Save the return address now.  */
+       movl    (JB_PC*4)(%ecx), %edx
+       /* Restore registers.  */
+       movl    $0, %eax
+       movl    (JB_SP*4)(%ecx), %esp
+       jmp     *%edx           /* Jump to saved PC. */
+
+/* kgdb_fault_longjmp(int *jmp_buf[6]) */
+ENTRY(kgdb_fault_longjmp)
+       movl    JMPBUF(%esp), %ecx      /* User's jmp_buf in %ecx.  */
+       /* Save the return address now.  */
+       movl    (JB_PC*4)(%ecx), %edx
+       /* Restore registers.  */
+       movl    (JB_BX*4)(%ecx), %ebx
+       movl    (JB_SI*4)(%ecx), %esi
+       movl    (JB_DI*4)(%ecx), %edi
+       movl    (JB_BP*4)(%ecx), %ebp
+       movl    $1, %eax
+       movl    (JB_SP*4)(%ecx), %esp
+       jmp     *%edx           /* Jump to saved PC. */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/i386/kernel/kgdb.c linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/kgdb.c
--- linux-2.6.18-53.1.14/arch/i386/kernel/kgdb.c        1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/kgdb.c   2008-06-10 15:39:27.000000000 +0400
@@ -0,0 +1,363 @@
+/*
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ */
+
+/*
+ * Copyright (C) 2000-2001 VERITAS Software Corporation.
+ */
+/*
+ *  Contributor:     Lake Stevens Instrument Division$
+ *  Written by:      Glenn Engel $
+ *  Updated by:             Amit Kale<akale@veritas.com>
+ *  Updated by:             Tom Rini <trini@kernel.crashing.org>
+ *  Modified for 386 by Jim Kingdon, Cygnus Support.
+ *  Origianl kgdb, compatibility with 2.1.xx kernel by
+ *  David Grothe <dave@gcom.com>
+ *  Additional support from Tigran Aivazian <tigran@sco.com>
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <asm/vm86.h>
+#include <asm/system.h>
+#include <asm/ptrace.h>                /* for linux pt_regs struct */
+#include <linux/kgdb.h>
+#include <linux/init.h>
+#include <asm/apicdef.h>
+#include <asm/desc.h>
+#include <asm/kdebug.h>
+
+#include "mach_ipi.h"
+
+/* Put the error code here just in case the user cares.  */
+int gdb_i386errcode;
+/* Likewise, the vector number here (since GDB only gets the signal
+   number through the usual means, and that's not very specific).  */
+int gdb_i386vector = -1;
+
+extern atomic_t cpu_doing_single_step;
+
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+       gdb_regs[_EAX] = regs->eax;
+       gdb_regs[_EBX] = regs->ebx;
+       gdb_regs[_ECX] = regs->ecx;
+       gdb_regs[_EDX] = regs->edx;
+       gdb_regs[_ESI] = regs->esi;
+       gdb_regs[_EDI] = regs->edi;
+       gdb_regs[_EBP] = regs->ebp;
+       gdb_regs[_DS] = regs->xds;
+       gdb_regs[_ES] = regs->xes;
+       gdb_regs[_PS] = regs->eflags;
+       gdb_regs[_CS] = regs->xcs;
+       gdb_regs[_PC] = regs->eip;
+       gdb_regs[_ESP] = (int)(&regs->esp);
+       gdb_regs[_SS] = __KERNEL_DS;
+       gdb_regs[_FS] = 0xFFFF;
+       gdb_regs[_GS] = 0xFFFF;
+}
+
+/*
+ * Extracts ebp, esp and eip values understandable by gdb from the values
+ * saved by switch_to.
+ * thread.esp points to ebp. flags and ebp are pushed in switch_to hence esp
+ * prior to entering switch_to is 8 greater then the value that is saved.
+ * If switch_to changes, change following code appropriately.
+ */
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+       gdb_regs[_EAX] = 0;
+       gdb_regs[_EBX] = 0;
+       gdb_regs[_ECX] = 0;
+       gdb_regs[_EDX] = 0;
+       gdb_regs[_ESI] = 0;
+       gdb_regs[_EDI] = 0;
+       gdb_regs[_EBP] = *(unsigned long *)p->thread.esp;
+       gdb_regs[_DS] = __KERNEL_DS;
+       gdb_regs[_ES] = __KERNEL_DS;
+       gdb_regs[_PS] = 0;
+       gdb_regs[_CS] = __KERNEL_CS;
+       gdb_regs[_PC] = p->thread.eip;
+       gdb_regs[_ESP] = p->thread.esp;
+       gdb_regs[_SS] = __KERNEL_DS;
+       gdb_regs[_FS] = 0xFFFF;
+       gdb_regs[_GS] = 0xFFFF;
+}
+
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+       regs->eax = gdb_regs[_EAX];
+       regs->ebx = gdb_regs[_EBX];
+       regs->ecx = gdb_regs[_ECX];
+       regs->edx = gdb_regs[_EDX];
+       regs->esi = gdb_regs[_ESI];
+       regs->edi = gdb_regs[_EDI];
+       regs->ebp = gdb_regs[_EBP];
+       regs->xds = gdb_regs[_DS];
+       regs->xes = gdb_regs[_ES];
+       regs->eflags = gdb_regs[_PS];
+       regs->xcs = gdb_regs[_CS];
+       regs->eip = gdb_regs[_PC];
+}
+
+static struct hw_breakpoint {
+       unsigned enabled;
+       unsigned type;
+       unsigned len;
+       unsigned addr;
+} breakinfo[4] = {
+       { .enabled = 0 },
+       { .enabled = 0 },
+       { .enabled = 0 },
+       { .enabled = 0 },
+};
+
+void kgdb_correct_hw_break(void)
+{
+       int breakno;
+       int correctit;
+       int breakbit;
+       unsigned dr7;
+
+       asm volatile ("movl %%db7, %0\n":"=r" (dr7)
+                     :);
+       do {
+               unsigned addr0, addr1, addr2, addr3;
+               asm volatile ("movl %%db0, %0\n"
+                             "movl %%db1, %1\n"
+                             "movl %%db2, %2\n"
+                             "movl %%db3, %3\n":"=r" (addr0), "=r"(addr1),
+                             "=r"(addr2), "=r"(addr3):);
+       } while (0);
+       correctit = 0;
+       for (breakno = 0; breakno < 3; breakno++) {
+               breakbit = 2 << (breakno << 1);
+               if (!(dr7 & breakbit) && breakinfo[breakno].enabled) {
+                       correctit = 1;
+                       dr7 |= breakbit;
+                       dr7 &= ~(0xf0000 << (breakno << 2));
+                       dr7 |= (((breakinfo[breakno].len << 2) |
+                                breakinfo[breakno].type) << 16) <<
+                           (breakno << 2);
+                       switch (breakno) {
+                       case 0:
+                               asm volatile ("movl %0, %%dr0\n"::"r"
+                                             (breakinfo[breakno].addr));
+                               break;
+
+                       case 1:
+                               asm volatile ("movl %0, %%dr1\n"::"r"
+                                             (breakinfo[breakno].addr));
+                               break;
+
+                       case 2:
+                               asm volatile ("movl %0, %%dr2\n"::"r"
+                                             (breakinfo[breakno].addr));
+                               break;
+
+                       case 3:
+                               asm volatile ("movl %0, %%dr3\n"::"r"
+                                             (breakinfo[breakno].addr));
+                               break;
+                       }
+               } else if ((dr7 & breakbit) && !breakinfo[breakno].enabled) {
+                       correctit = 1;
+                       dr7 &= ~breakbit;
+                       dr7 &= ~(0xf0000 << (breakno << 2));
+               }
+       }
+       if (correctit)
+               asm volatile ("movl %0, %%db7\n"::"r" (dr7));
+}
+
+int kgdb_remove_hw_break(unsigned long addr)
+{
+       int i, idx = -1;
+       for (i = 0; i < 4; i++) {
+               if (breakinfo[i].addr == addr && breakinfo[i].enabled) {
+                       idx = i;
+                       break;
+               }
+       }
+       if (idx == -1)
+               return -1;
+
+       breakinfo[idx].enabled = 0;
+       return 0;
+}
+
+void kgdb_remove_all_hw_break(void)
+{
+       int i;
+
+       for (i = 0; i < 4; i++) {
+               if (breakinfo[i].enabled) {
+                       /* Do what? */
+                       ;
+               }
+               memset(&breakinfo[i], 0, sizeof(struct hw_breakpoint));
+       }
+}
+
+int kgdb_set_hw_break(unsigned long addr)
+{
+       int i, idx = -1;
+       for (i = 0; i < 4; i++) {
+               if (!breakinfo[i].enabled) {
+                       idx = i;
+                       break;
+               }
+       }
+       if (idx == -1)
+               return -1;
+
+       breakinfo[idx].enabled = 1;
+       breakinfo[idx].type = 1;
+       breakinfo[idx].len = 1;
+       breakinfo[idx].addr = addr;
+       return 0;
+}
+
+void kgdb_disable_hw_debug(struct pt_regs *regs)
+{
+       /* Disable hardware debugging while we are in kgdb */
+       asm volatile ("movl %0,%%db7": /* no output */ :"r" (0));
+}
+
+void kgdb_post_master_code(struct pt_regs *regs, int e_vector, int err_code)
+{
+       /* Master processor is completely in the debugger */
+       gdb_i386vector = e_vector;
+       gdb_i386errcode = err_code;
+}
+
+void kgdb_roundup_cpus(unsigned long flags)
+{
+       send_IPI_allbutself(APIC_DM_NMI);
+}
+
+int kgdb_arch_handle_exception(int e_vector, int signo,
+                              int err_code, char *remcom_in_buffer,
+                              char *remcom_out_buffer,
+                              struct pt_regs *linux_regs)
+{
+       long addr;
+       char *ptr;
+       int newPC, dr6;
+
+       switch (remcom_in_buffer[0]) {
+       case 'c':
+       case 's':
+               /* try to read optional parameter, pc unchanged if no parm */
+               ptr = &remcom_in_buffer[1];
+               if (kgdb_hex2long(&ptr, &addr))
+                       linux_regs->eip = addr;
+               newPC = linux_regs->eip;
+
+               /* clear the trace bit */
+               linux_regs->eflags &= ~TF_MASK;
+               atomic_set(&cpu_doing_single_step, -1);
+
+               /* set the trace bit if we're stepping */
+               if (remcom_in_buffer[0] == 's') {
+                       linux_regs->eflags |= TF_MASK;
+                       debugger_step = 1;
+                       atomic_set(&cpu_doing_single_step,smp_processor_id());
+               }
+
+               asm volatile ("movl %%db6, %0\n":"=r" (dr6));
+               if (!(dr6 & 0x4000)) {
+                       long breakno;
+                       for (breakno = 0; breakno < 4; ++breakno) {
+                               if (dr6 & (1 << breakno) &&
+                                   breakinfo[breakno].type == 0) {
+                                       /* Set restore flag */
+                                       linux_regs->eflags |= X86_EFLAGS_RF;
+                                       break;
+                               }
+                       }
+               }
+               kgdb_correct_hw_break();
+               asm volatile ("movl %0, %%db6\n"::"r" (0));
+
+               return (0);
+       }                       /* switch */
+       /* this means that we do not want to exit from the handler */
+       return -1;
+}
+
+/* Register KGDB with the i386die_chain so that we hook into all of the right
+ * spots. */
+static int kgdb_notify(struct notifier_block *self, unsigned long cmd,
+                      void *ptr)
+{
+       struct die_args *args = ptr;
+       struct pt_regs *regs = args->regs;
+
+       /* Bad memory access? */
+       if (cmd == DIE_PAGE_FAULT_NO_CONTEXT && atomic_read(&debugger_active)
+                       && kgdb_may_fault) {
+               kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+               return NOTIFY_STOP;
+       } else if (cmd == DIE_PAGE_FAULT)
+               /* A normal page fault, ignore. */
+               return NOTIFY_DONE;
+       else if ((cmd == DIE_NMI || cmd == DIE_NMI_IPI ||
+               cmd == DIE_NMIWATCHDOG) && atomic_read(&debugger_active)) {
+               /* CPU roundup */
+               kgdb_nmihook(smp_processor_id(), regs);
+               return NOTIFY_STOP;
+       } else if (cmd == DIE_NMI_IPI || cmd == DIE_NMI || user_mode(regs) ||
+                       (cmd == DIE_DEBUG && atomic_read(&debugger_active)))
+               /* Normal watchdog event or userspace debugging, or spurious
+                * debug exception, ignore. */
+               return NOTIFY_DONE;
+
+       kgdb_handle_exception(args->trapnr, args->signr, args->err, regs);
+
+       return NOTIFY_STOP;
+}
+
+static struct notifier_block kgdb_notifier = {
+       .notifier_call = kgdb_notify,
+};
+
+int kgdb_arch_init(void)
+{
+       atomic_notifier_chain_register(&i386die_chain, &kgdb_notifier);
+       return 0;
+}
+
+/*
+ * Skip an int3 exception when it occurs after a breakpoint has been
+ * removed. Backtrack eip by 1 since the int3 would have caused it to
+ * increment by 1.
+ */
+
+int kgdb_skipexception(int exception, struct pt_regs *regs)
+{
+       if (exception == 3 && kgdb_isremovedbreak(regs->eip - 1)) {
+               regs->eip -= 1;
+               return 1;
+       }
+       return 0;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+       .gdb_bpt_instr = {0xcc},
+       .flags = KGDB_HW_BREAKPOINT,
+};
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/i386/kernel/setup.c linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/setup.c
--- linux-2.6.18-53.1.14/arch/i386/kernel/setup.c       2008-03-06 05:54:58.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/setup.c  2008-06-10 15:38:03.000000000 +0400
@@ -148,6 +148,7 @@ EXPORT_SYMBOL(ist_info);
 struct e820map e820;
 
 extern void early_cpu_init(void);
+extern void early_trap_init(void);
 extern void generic_apic_probe(char *);
 extern int root_mountflags;
 
@@ -1470,6 +1471,7 @@ void __init setup_arch(char **cmdline_p)
        memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
        pre_setup_arch_hook();
        early_cpu_init();
+       early_trap_init();
 
        /*
         * FIXME: This isn't an official loader_type right
@@ -1526,6 +1528,7 @@ void __init setup_arch(char **cmdline_p)
        data_resource.end = virt_to_phys(_edata)-1;
 
        parse_cmdline_early(cmdline_p);
+       parse_early_param();
 
 #ifdef CONFIG_EARLY_PRINTK
        {
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/i386/kernel/smpboot.c linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/smpboot.c
--- linux-2.6.18-53.1.14/arch/i386/kernel/smpboot.c     2008-03-06 05:54:34.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/smpboot.c        2008-06-10 15:39:01.000000000 +0400
@@ -592,6 +592,9 @@ void __devinit initialize_secondary(void
 
        asm volatile(
                "movl %0,%%esp\n\t"
+#ifdef CONFIG_KGDB
+               "pushl end_of_stack_stop_unwind_function\n\t"
+#endif
                "jmp *%1"
                :
                :"r" (current->thread.esp),"r" (current->thread.eip));
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/i386/kernel/traps.c linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/traps.c
--- linux-2.6.18-53.1.14/arch/i386/kernel/traps.c       2008-03-06 05:55:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/i386/kernel/traps.c  2008-06-10 15:38:03.000000000 +0400
@@ -964,6 +964,7 @@ fastcall void __kprobes do_debug(struct 
         */
 clear_dr7:
        set_debugreg(0, 7);
+       notify_die(DIE_DEBUG, "debug2", regs, condition, error_code, SIGTRAP);
        return;
 
 debug_vm86:
@@ -1268,6 +1269,12 @@ static void __init set_task_gate(unsigne
        _set_gate(idt_table+n,5,0,0,(gdt_entry<<3));
 }
 
+/* Some traps need to be set early. */
+void __init early_trap_init(void) {
+       set_intr_gate(1,&debug);
+       set_system_intr_gate(3, &int3); /* int3 can be called from all */
+       set_intr_gate(14,&page_fault);
+}
 
 void __init trap_init(void)
 {
@@ -1284,10 +1291,8 @@ void __init trap_init(void)
 #endif
 
        set_trap_gate(0,&divide_error);
-       set_intr_gate(1,&debug);
        set_intr_gate(2,&nmi);
-       set_system_intr_gate(3, &int3); /* int3/4 can be called from all */
-       set_system_gate(4,&overflow);
+       set_system_gate(4,&overflow); /* int4/5 can be called from all */
        set_trap_gate(5,&bounds);
        set_trap_gate(6,&invalid_op);
        set_trap_gate(7,&device_not_available);
@@ -1297,7 +1302,6 @@ void __init trap_init(void)
        set_trap_gate(11,&segment_not_present);
        set_trap_gate(12,&stack_segment);
        set_trap_gate(13,&general_protection);
-       set_intr_gate(14,&page_fault);
        set_trap_gate(15,&spurious_interrupt_bug);
        set_trap_gate(16,&coprocessor_error);
        set_trap_gate(17,&alignment_check);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/i386/mm/fault.c linux-2.6.18-53.1.14.kgdb/arch/i386/mm/fault.c
--- linux-2.6.18-53.1.14/arch/i386/mm/fault.c   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/i386/mm/fault.c      2008-06-10 15:38:03.000000000 +0400
@@ -539,6 +539,10 @@ no_context:
        if (is_prefetch(regs, address, error_code))
                return;
 
+       if (notify_die(DIE_PAGE_FAULT_NO_CONTEXT, "no context", regs,
+                               error_code, 14, SIGSEGV) == NOTIFY_STOP)
+               return;
+
 /*
  * Oops. The kernel tried to access some bad page. We'll have to
  * terminate things with extreme prejudice.
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/kernel/Makefile linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/Makefile
--- linux-2.6.18-53.1.14/arch/ia64/kernel/Makefile      2008-03-06 05:54:11.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/Makefile 2008-06-10 15:38:32.000000000 +0400
@@ -32,6 +32,7 @@ obj-$(CONFIG_KEXEC)           += machine_kexec.o 
 obj-$(CONFIG_IA64_UNCACHED_ALLOCATOR)  += uncached.o
 obj-$(CONFIG_AUDIT)            += audit.o
 mca_recovery-y                 += mca_drv.o mca_drv_asm.o
+obj-$(CONFIG_KGDB)             += kgdb.o kgdb-jmp.o
 
 # The gate DSO image is built using a special linker script.
 targets += gate.so gate-syms.o
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/kernel/entry.S linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/entry.S
--- linux-2.6.18-53.1.14/arch/ia64/kernel/entry.S       2008-03-06 05:54:43.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/entry.S  2008-06-10 15:39:39.000000000 +0400
@@ -959,9 +959,9 @@ GLOBAL_ENTRY(__ia64_leave_kernel)
        shr.u r18=r19,16        // get byte size of existing "dirty" partition
        ;;
        mov r16=ar.bsp          // get existing backing store pointer
-       addl r17=THIS_CPU(ia64_phys_stacked_size_p8),r0
+(pUStk)        addl r17=THIS_CPU(ia64_phys_stacked_size_p8),r0
        ;;
-       ld4 r17=[r17]           // r17 = cpu_data->phys_stacked_size_p8
+(pUStk)        ld4 r17=[r17]           // r17 = cpu_data->phys_stacked_size_p8
 (pKStk)        br.cond.dpnt skip_rbs_switch
 
        /*
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/kernel/ivt.S linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/ivt.S
--- linux-2.6.18-53.1.14/arch/ia64/kernel/ivt.S 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/ivt.S    2008-06-10 15:39:39.000000000 +0400
@@ -52,6 +52,14 @@
 #include <asm/unistd.h>
 #include <asm/errno.h>
 
+#ifdef CONFIG_KGDB
+#define KGDB_ENABLE_PSR_DB mov r31=psr;; movl r30=IA64_PSR_DB;;        \
+       or r31=r31,r30;;                                        \
+       mov psr.l=r31;; srlz.i;;
+#else
+#define KGDB_ENABLE_PSR_DB
+#endif
+
 #if 1
 # define PSR_DEFAULT_BITS      psr.ac
 #else
@@ -519,6 +527,7 @@ ENTRY(page_fault)
        movl r14=ia64_leave_kernel
        ;;
        SAVE_REST
+       KGDB_ENABLE_PSR_DB
        mov rp=r14
        ;;
        adds out2=16,r12                        // out2 = pointer to pt_regs
@@ -863,6 +872,7 @@ ENTRY(interrupt)
        srlz.i                  // ensure everybody knows psr.ic is back on
        ;;
        SAVE_REST
+       KGDB_ENABLE_PSR_DB
        ;;
        MCA_RECOVER_RANGE(interrupt)
        alloc r14=ar.pfs,0,0,2,0 // must be first in an insn group
@@ -1110,6 +1120,7 @@ ENTRY(non_syscall)
        movl r15=ia64_leave_kernel
        ;;
        SAVE_REST
+       KGDB_ENABLE_PSR_DB
        mov rp=r15
        ;;
        br.call.sptk.many b6=ia64_bad_break     // avoid WAW on CFM and ignore return addr
@@ -1143,6 +1154,7 @@ ENTRY(dispatch_unaligned_handler)
        adds r3=8,r2                            // set up second base pointer
        ;;
        SAVE_REST
+       KGDB_ENABLE_PSR_DB
        movl r14=ia64_leave_kernel
        ;;
        mov rp=r14
@@ -1185,6 +1197,10 @@ ENTRY(dispatch_to_fault_handler)
        adds r3=8,r2                            // set up second base pointer for SAVE_REST
        ;;
        SAVE_REST
+       cmp.eq p6,p0=29,out0
+(p6)   br.cond.spnt 1f;;                       // debug_vector
+       KGDB_ENABLE_PSR_DB
+1:
        movl r14=ia64_leave_kernel
        ;;
        mov rp=r14
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/kernel/kgdb-jmp.S linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/kgdb-jmp.S
--- linux-2.6.18-53.1.14/arch/ia64/kernel/kgdb-jmp.S    1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/kgdb-jmp.S       2008-06-10 15:38:32.000000000 +0400
@@ -0,0 +1,238 @@
+/* setjmp() and longjmp() assembler support for kdb on ia64.
+
+   This code was copied from glibc CVS as of 2001-06-27 and modified where
+   necessary to fit the kernel.
+   Keith Owens <kaos@melbourne.sgi.com> 2001-06-27
+ */
+
+/* Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+   Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include <asm/asmmacro.h>
+GLOBAL_ENTRY(kgdb_fault_setjmp)
+       .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(2)
+       alloc loc1=ar.pfs,2,2,2,0
+       mov r16=ar.unat
+       ;;
+       mov r17=ar.fpsr
+       mov r2=in0
+       add r3=8,in0
+       ;;
+.mem.offset 0,0;
+       st8.spill.nta [r2]=sp,16        // r12 (sp)
+.mem.offset 8,0;
+       st8.spill.nta [r3]=gp,16        // r1 (gp)
+       ;;
+       st8.nta [r2]=r16,16             // save caller's unat
+       st8.nta [r3]=r17,16             // save fpsr
+       add r8=0xa0,in0
+       ;;
+.mem.offset 160,0;
+       st8.spill.nta [r2]=r4,16        // r4
+.mem.offset 168,0;
+       st8.spill.nta [r3]=r5,16        // r5
+       add r9=0xb0,in0
+       ;;
+       stf.spill.nta [r8]=f2,32
+       stf.spill.nta [r9]=f3,32
+       mov loc0=rp
+       .body
+       ;;
+       stf.spill.nta [r8]=f4,32
+       stf.spill.nta [r9]=f5,32
+       mov r17=b1
+       ;;
+       stf.spill.nta [r8]=f16,32
+       stf.spill.nta [r9]=f17,32
+       mov r18=b2
+       ;;
+       stf.spill.nta [r8]=f18,32
+       stf.spill.nta [r9]=f19,32
+       mov r19=b3
+       ;;
+       stf.spill.nta [r8]=f20,32
+       stf.spill.nta [r9]=f21,32
+       mov r20=b4
+       ;;
+       stf.spill.nta [r8]=f22,32
+       stf.spill.nta [r9]=f23,32
+       mov r21=b5
+       ;;
+       stf.spill.nta [r8]=f24,32
+       stf.spill.nta [r9]=f25,32
+       mov r22=ar.lc
+       ;;
+       stf.spill.nta [r8]=f26,32
+       stf.spill.nta [r9]=f27,32
+       mov r24=pr
+       ;;
+       stf.spill.nta [r8]=f28,32
+       stf.spill.nta [r9]=f29,32
+       ;;
+       stf.spill.nta [r8]=f30
+       stf.spill.nta [r9]=f31
+
+.mem.offset 0,0;
+       st8.spill.nta [r2]=r6,16        // r6
+.mem.offset 8,0;
+       st8.spill.nta [r3]=r7,16        // r7
+       ;;
+       mov r23=ar.bsp
+       mov r25=ar.unat
+       st8.nta [r2]=loc0,16            // b0
+       st8.nta [r3]=r17,16             // b1
+       ;;
+       st8.nta [r2]=r18,16             // b2
+       st8.nta [r3]=r19,16             // b3
+       ;;
+       st8.nta [r2]=r20,16             // b4
+       st8.nta [r3]=r21,16             // b5
+       ;;
+       st8.nta [r2]=loc1,16            // ar.pfs
+       st8.nta [r3]=r22,16             // ar.lc
+       ;;
+       st8.nta [r2]=r24,16             // pr
+       st8.nta [r3]=r23,16             // ar.bsp
+       ;;
+       st8.nta [r2]=r25                // ar.unat
+       st8.nta [r3]=in0                // &__jmp_buf
+       mov r8=0
+       mov rp=loc0
+       mov ar.pfs=loc1
+       br.ret.sptk.few rp
+END(kdba_setjmp)
+#define        pPos    p6      /* is rotate count positive? */
+#define        pNeg    p7      /* is rotate count negative? */
+GLOBAL_ENTRY(kgdb_fault_longjmp)
+       alloc r8=ar.pfs,2,1,0,0
+       mov r27=ar.rsc
+       add r2=0x98,in0         // r2 <- &jmpbuf.orig_jmp_buf_addr
+       ;;
+       ld8 r8=[r2],-16         // r8 <- orig_jmp_buf_addr
+       mov r10=ar.bsp
+       and r11=~0x3,r27        // clear ar.rsc.mode
+       ;;
+       flushrs                 // flush dirty regs to backing store (must be first in insn grp)
+       ld8 r23=[r2],8          // r23 <- jmpbuf.ar_bsp
+       sub r8=r8,in0           // r8 <- &orig_jmpbuf - &jmpbuf
+       ;;
+       ld8 r25=[r2]            // r25 <- jmpbuf.ar_unat
+       extr.u r8=r8,3,6        // r8 <- (&orig_jmpbuf - &jmpbuf)/8 & 0x3f
+       ;;
+       cmp.lt pNeg,pPos=r8,r0
+       mov r2=in0
+       ;;
+(pPos) mov r16=r8
+(pNeg) add r16=64,r8
+(pPos) sub r17=64,r8
+(pNeg) sub r17=r0,r8
+       ;;
+       mov ar.rsc=r11          // put RSE in enforced lazy mode
+       shr.u r8=r25,r16
+       add r3=8,in0            // r3 <- &jmpbuf.r1
+       shl r9=r25,r17
+       ;;
+       or r25=r8,r9
+       ;;
+       mov r26=ar.rnat
+       mov ar.unat=r25         // setup ar.unat (NaT bits for r1, r4-r7, and r12)
+       ;;
+       ld8.fill.nta sp=[r2],16 // r12 (sp)
+       ld8.fill.nta gp=[r3],16         // r1 (gp)
+       dep r11=-1,r23,3,6      // r11 <- ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+       ;;
+       ld8.nta r16=[r2],16             // caller's unat
+       ld8.nta r17=[r3],16             // fpsr
+       ;;
+       ld8.fill.nta r4=[r2],16 // r4
+       ld8.fill.nta r5=[r3],16         // r5 (gp)
+       cmp.geu p8,p0=r10,r11   // p8 <- (ar.bsp >= jmpbuf.ar_bsp)
+       ;;
+       ld8.fill.nta r6=[r2],16 // r6
+       ld8.fill.nta r7=[r3],16         // r7
+       ;;
+       mov ar.unat=r16                 // restore caller's unat
+       mov ar.fpsr=r17                 // restore fpsr
+       ;;
+       ld8.nta r16=[r2],16             // b0
+       ld8.nta r17=[r3],16             // b1
+       ;;
+(p8)   ld8 r26=[r11]           // r26 <- *ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+       mov ar.bspstore=r23     // restore ar.bspstore
+       ;;
+       ld8.nta r18=[r2],16             // b2
+       ld8.nta r19=[r3],16             // b3
+       ;;
+       ld8.nta r20=[r2],16             // b4
+       ld8.nta r21=[r3],16             // b5
+       ;;
+       ld8.nta r11=[r2],16             // ar.pfs
+       ld8.nta r22=[r3],56             // ar.lc
+       ;;
+       ld8.nta r24=[r2],32             // pr
+       mov b0=r16
+       ;;
+       ldf.fill.nta f2=[r2],32
+       ldf.fill.nta f3=[r3],32
+       mov b1=r17
+       ;;
+       ldf.fill.nta f4=[r2],32
+       ldf.fill.nta f5=[r3],32
+       mov b2=r18
+       ;;
+       ldf.fill.nta f16=[r2],32
+       ldf.fill.nta f17=[r3],32
+       mov b3=r19
+       ;;
+       ldf.fill.nta f18=[r2],32
+       ldf.fill.nta f19=[r3],32
+       mov b4=r20
+       ;;
+       ldf.fill.nta f20=[r2],32
+       ldf.fill.nta f21=[r3],32
+       mov b5=r21
+       ;;
+       ldf.fill.nta f22=[r2],32
+       ldf.fill.nta f23=[r3],32
+       mov ar.lc=r22
+       ;;
+       ldf.fill.nta f24=[r2],32
+       ldf.fill.nta f25=[r3],32
+       cmp.eq p8,p9=0,in1
+       ;;
+       ldf.fill.nta f26=[r2],32
+       ldf.fill.nta f27=[r3],32
+       mov ar.pfs=r11
+       ;;
+       ldf.fill.nta f28=[r2],32
+       ldf.fill.nta f29=[r3],32
+       ;;
+       ldf.fill.nta f30=[r2]
+       ldf.fill.nta f31=[r3]
+(p8)   mov r8=1
+
+       mov ar.rnat=r26         // restore ar.rnat
+       ;;
+       mov ar.rsc=r27          // restore ar.rsc
+(p9)   mov r8=in1
+
+       invala                  // virt. -> phys. regnum mapping may change
+       mov pr=r24,-1
+       br.ret.sptk.few rp
+END(kgdb_fault_longjmp)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/kernel/kgdb.c linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/kgdb.c
--- linux-2.6.18-53.1.14/arch/ia64/kernel/kgdb.c        1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/kgdb.c   2008-06-10 15:38:32.000000000 +0400
@@ -0,0 +1,1131 @@
+/*
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ */
+
+/*
+ * Copyright (C) 2000-2001 VERITAS Software Corporation.
+ * (c) Copyright 2005 Hewlett-Packard Development Company, L.P.
+ *     Bob Picco <bob.picco@hp.com>
+ */
+/*
+ *  Contributor:     Lake Stevens Instrument Division$
+ *  Written by:      Glenn Engel $
+ *  Updated by:             Amit Kale<akale@veritas.com>
+ *  Modified for 386 by Jim Kingdon, Cygnus Support.
+ *  Origianl kgdb, compatibility with 2.1.xx kernel by David Grothe <dave@gcom.com>
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <asm/system.h>
+#include <asm/ptrace.h>                /* for linux pt_regs struct */
+#include <asm/unwind.h>
+#include <asm/rse.h>
+#include <linux/kgdb.h>
+#include <linux/init.h>
+#include <asm/cacheflush.h>
+#include <asm/kdebug.h>
+
+#define NUM_REGS 590
+#define REGISTER_BYTES (NUM_REGS*8+128*8)
+#define REGISTER_BYTE(N) (((N) * 8)                                    \
+       + ((N) <= IA64_FR0_REGNUM ?                                     \
+       0 : 8 * (((N) > IA64_FR127_REGNUM) ? 128 : (N) - IA64_FR0_REGNUM)))
+#define REGISTER_SIZE(N)                                               \
+       (((N) >= IA64_FR0_REGNUM && (N) <= IA64_FR127_REGNUM) ? 16 : 8)
+#define IA64_GR0_REGNUM         0
+#define IA64_FR0_REGNUM         128
+#define IA64_FR127_REGNUM       (IA64_FR0_REGNUM+127)
+#define IA64_PR0_REGNUM         256
+#define IA64_BR0_REGNUM         320
+#define IA64_VFP_REGNUM         328
+#define IA64_PR_REGNUM          330
+#define IA64_IP_REGNUM          331
+#define IA64_PSR_REGNUM         332
+#define IA64_CFM_REGNUM         333
+#define IA64_AR0_REGNUM         334
+#define IA64_NAT0_REGNUM        462
+#define IA64_NAT31_REGNUM       (IA64_NAT0_REGNUM+31)
+#define IA64_NAT32_REGNUM       (IA64_NAT0_REGNUM+32)
+#define IA64_RSC_REGNUM                (IA64_AR0_REGNUM+16)
+#define IA64_BSP_REGNUM                (IA64_AR0_REGNUM+17)
+#define IA64_BSPSTORE_REGNUM   (IA64_AR0_REGNUM+18)
+#define IA64_RNAT_REGNUM       (IA64_AR0_REGNUM+19)
+#define IA64_FCR_REGNUM                (IA64_AR0_REGNUM+21)
+#define IA64_EFLAG_REGNUM      (IA64_AR0_REGNUM+24)
+#define IA64_CSD_REGNUM                (IA64_AR0_REGNUM+25)
+#define IA64_SSD_REGNUM                (IA64_AR0_REGNUM+26)
+#define IA64_CFLG_REGNUM       (IA64_AR0_REGNUM+27)
+#define IA64_FSR_REGNUM                (IA64_AR0_REGNUM+28)
+#define IA64_FIR_REGNUM                (IA64_AR0_REGNUM+29)
+#define IA64_FDR_REGNUM                (IA64_AR0_REGNUM+30)
+#define IA64_CCV_REGNUM                (IA64_AR0_REGNUM+32)
+#define IA64_UNAT_REGNUM       (IA64_AR0_REGNUM+36)
+#define IA64_FPSR_REGNUM       (IA64_AR0_REGNUM+40)
+#define IA64_ITC_REGNUM                (IA64_AR0_REGNUM+44)
+#define IA64_PFS_REGNUM                (IA64_AR0_REGNUM+64)
+#define IA64_LC_REGNUM         (IA64_AR0_REGNUM+65)
+#define IA64_EC_REGNUM         (IA64_AR0_REGNUM+66)
+
+#define        REGISTER_INDEX(N)       (REGISTER_BYTE(N) / sizeof (unsigned long))
+#define BREAK_INSTR_ALIGN      (~0xfULL)
+
+#define        ptoff(V)        ((unsigned int) &((struct pt_regs *)0x0)->V)
+struct reg_to_ptreg_index {
+       unsigned int reg;
+       unsigned int ptregoff;
+};
+
+static struct reg_to_ptreg_index gr_reg_to_ptreg_index[] = {
+       {IA64_GR0_REGNUM + 1, ptoff(r1)},
+       {IA64_GR0_REGNUM + 2, ptoff(r2)},
+       {IA64_GR0_REGNUM + 3, ptoff(r3)},
+       {IA64_GR0_REGNUM + 8, ptoff(r8)},
+       {IA64_GR0_REGNUM + 9, ptoff(r9)},
+       {IA64_GR0_REGNUM + 10, ptoff(r10)},
+       {IA64_GR0_REGNUM + 11, ptoff(r11)},
+       {IA64_GR0_REGNUM + 12, ptoff(r12)},
+       {IA64_GR0_REGNUM + 13, ptoff(r13)},
+       {IA64_GR0_REGNUM + 14, ptoff(r14)},
+       {IA64_GR0_REGNUM + 15, ptoff(r15)},
+       {IA64_GR0_REGNUM + 16, ptoff(r16)},
+       {IA64_GR0_REGNUM + 17, ptoff(r17)},
+       {IA64_GR0_REGNUM + 18, ptoff(r18)},
+       {IA64_GR0_REGNUM + 19, ptoff(r19)},
+       {IA64_GR0_REGNUM + 20, ptoff(r20)},
+       {IA64_GR0_REGNUM + 21, ptoff(r21)},
+       {IA64_GR0_REGNUM + 22, ptoff(r22)},
+       {IA64_GR0_REGNUM + 23, ptoff(r23)},
+       {IA64_GR0_REGNUM + 24, ptoff(r24)},
+       {IA64_GR0_REGNUM + 25, ptoff(r25)},
+       {IA64_GR0_REGNUM + 26, ptoff(r26)},
+       {IA64_GR0_REGNUM + 27, ptoff(r27)},
+       {IA64_GR0_REGNUM + 28, ptoff(r28)},
+       {IA64_GR0_REGNUM + 29, ptoff(r29)},
+       {IA64_GR0_REGNUM + 30, ptoff(r30)},
+       {IA64_GR0_REGNUM + 31, ptoff(r31)},
+};
+
+static struct reg_to_ptreg_index br_reg_to_ptreg_index[] = {
+       {IA64_BR0_REGNUM, ptoff(b0)},
+       {IA64_BR0_REGNUM + 6, ptoff(b6)},
+       {IA64_BR0_REGNUM + 7, ptoff(b7)},
+};
+
+static struct reg_to_ptreg_index ar_reg_to_ptreg_index[] = {
+       {IA64_PFS_REGNUM, ptoff(ar_pfs)},
+       {IA64_UNAT_REGNUM, ptoff(ar_unat)},
+       {IA64_RNAT_REGNUM, ptoff(ar_rnat)},
+       {IA64_BSPSTORE_REGNUM, ptoff(ar_bspstore)},
+       {IA64_RSC_REGNUM, ptoff(ar_rsc)},
+       {IA64_CSD_REGNUM, ptoff(ar_csd)},
+       {IA64_SSD_REGNUM, ptoff(ar_ssd)},
+       {IA64_FPSR_REGNUM, ptoff(ar_fpsr)},
+       {IA64_CCV_REGNUM, ptoff(ar_ccv)},
+};
+
+extern atomic_t cpu_doing_single_step;
+
+static int kgdb_gr_reg(int regnum, struct unw_frame_info *info,
+       unsigned long *reg, int rw)
+{
+       char nat;
+
+       if ((regnum >= IA64_GR0_REGNUM && regnum <= (IA64_GR0_REGNUM + 1)) ||
+               (regnum >= (IA64_GR0_REGNUM + 4) &&
+               regnum <= (IA64_GR0_REGNUM + 7)))
+               return !unw_access_gr(info, regnum - IA64_GR0_REGNUM,
+               reg, &nat, rw);
+       else
+               return 0;
+}
+static int kgdb_gr_ptreg(int regnum, struct pt_regs * ptregs,
+       struct unw_frame_info *info, unsigned long *reg, int rw)
+{
+       int i, result = 1;
+       char nat;
+
+       if (!((regnum >= (IA64_GR0_REGNUM + 2) &&
+               regnum <= (IA64_GR0_REGNUM + 3)) ||
+               (regnum >= (IA64_GR0_REGNUM + 8) &&
+               regnum <= (IA64_GR0_REGNUM + 15)) ||
+               (regnum >= (IA64_GR0_REGNUM + 16) &&
+               regnum <= (IA64_GR0_REGNUM + 31))))
+               return 0;
+       else if (rw && ptregs) {
+               for (i = 0; i < ARRAY_SIZE(gr_reg_to_ptreg_index); i++)
+                       if (gr_reg_to_ptreg_index[i].reg == regnum) {
+                               *((unsigned long *)(((void *)ptregs) +
+                               gr_reg_to_ptreg_index[i].ptregoff)) = *reg;
+                               break;
+                       }
+       } else if (!rw && ptregs) {
+               for (i = 0; i < ARRAY_SIZE(gr_reg_to_ptreg_index); i++)
+                       if (gr_reg_to_ptreg_index[i].reg == regnum) {
+                               *reg = *((unsigned long *)
+                               (((void *)ptregs) +
+                                gr_reg_to_ptreg_index[i].ptregoff));
+                               break;
+                       }
+       } else
+               result = !unw_access_gr(info, regnum - IA64_GR0_REGNUM,
+                                       reg, &nat, rw);
+       return result;
+}
+
+static int kgdb_br_reg(int regnum, struct pt_regs * ptregs,
+       struct unw_frame_info *info, unsigned long *reg, int rw)
+{
+       int i, result = 1;
+
+       if (!(regnum >= IA64_BR0_REGNUM && regnum <= (IA64_BR0_REGNUM + 7)))
+               return 0;
+
+       switch (regnum) {
+       case IA64_BR0_REGNUM:
+       case IA64_BR0_REGNUM + 6:
+       case IA64_BR0_REGNUM + 7:
+               if (rw) {
+                       for (i = 0; i < ARRAY_SIZE(br_reg_to_ptreg_index); i++)
+                               if (br_reg_to_ptreg_index[i].reg == regnum) {
+                                       *((unsigned long *)
+                                       (((void *)ptregs) +
+                                       br_reg_to_ptreg_index[i].ptregoff)) =
+                                       *reg;
+                                       break;
+                               }
+               } else
+                       for (i = 0; i < ARRAY_SIZE(br_reg_to_ptreg_index); i++)
+                               if (br_reg_to_ptreg_index[i].reg == regnum) {
+                                               *reg = *((unsigned long *)
+                                               (((void *)ptregs) +
+                                               br_reg_to_ptreg_index[i].
+                                               ptregoff));
+                                               break;
+                               }
+               break;
+       case IA64_BR0_REGNUM + 1:
+       case IA64_BR0_REGNUM + 2:
+       case IA64_BR0_REGNUM + 3:
+       case IA64_BR0_REGNUM + 4:
+       case IA64_BR0_REGNUM + 5:
+               result = !unw_access_br(info, regnum - IA64_BR0_REGNUM,
+                               reg, rw);
+               break;
+       }
+
+       return result;
+}
+
+static int kgdb_fr_reg(int regnum, char *inbuffer, struct pt_regs * ptregs,
+       struct unw_frame_info *info, unsigned long *reg,
+       struct ia64_fpreg *freg, int rw)
+{
+       int result = 1;
+
+       if (!(regnum >= IA64_FR0_REGNUM && regnum <= (IA64_FR0_REGNUM + 127)))
+               return 0;
+
+       switch (regnum) {
+       case IA64_FR0_REGNUM + 6:
+       case IA64_FR0_REGNUM + 7:
+       case IA64_FR0_REGNUM + 8:
+       case IA64_FR0_REGNUM + 9:
+       case IA64_FR0_REGNUM + 10:
+       case IA64_FR0_REGNUM + 11:
+       case IA64_FR0_REGNUM + 12:
+               if (rw) {
+                       char *ptr = inbuffer;
+
+                       freg->u.bits[0] = *reg;
+                       kgdb_hex2long(&ptr, &freg->u.bits[1]);
+                       *(&ptregs->f6 + (regnum - (IA64_FR0_REGNUM + 6))) =
+                               *freg;
+                       break;
+               } else if (!ptregs)
+                       result = !unw_access_fr(info, regnum - IA64_FR0_REGNUM,
+                               freg, rw);
+               else
+                       *freg =
+                       *(&ptregs->f6 + (regnum - (IA64_FR0_REGNUM + 6)));
+               break;
+       default:
+               if (!rw)
+                       result = !unw_access_fr(info, regnum - IA64_FR0_REGNUM,
+                               freg, rw);
+               else
+                       result = 0;
+               break;
+       }
+
+       return result;
+}
+
+static int kgdb_ar_reg(int regnum, struct pt_regs * ptregs,
+       struct unw_frame_info *info, unsigned long *reg, int rw)
+{
+       int result = 0, i;
+
+       if (!(regnum >= IA64_AR0_REGNUM && regnum <= IA64_EC_REGNUM))
+               return 0;
+
+       if (rw && ptregs) {
+               for (i = 0; i < ARRAY_SIZE(ar_reg_to_ptreg_index); i++)
+                       if (ar_reg_to_ptreg_index[i].reg == regnum) {
+                               *((unsigned long *) (((void *)ptregs) +
+                               ar_reg_to_ptreg_index[i].ptregoff)) =
+                                       *reg;
+                               result = 1;
+                               break;
+                       }
+       } else if (ptregs) {
+               for (i = 0; i < ARRAY_SIZE(ar_reg_to_ptreg_index); i++)
+                       if (ar_reg_to_ptreg_index[i].reg == regnum) {
+                               *reg = *((unsigned long *) (((void *)ptregs) +
+                                       ar_reg_to_ptreg_index[i].ptregoff));
+                                       result = 1;
+                               break;
+                       }
+       }
+
+       if (result)
+               return result;
+
+       result = 1;
+
+       switch (regnum) {
+       case IA64_CSD_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_CSD, reg, rw);
+               break;
+       case IA64_SSD_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_SSD, reg, rw);
+               break;
+       case IA64_UNAT_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_RNAT, reg, rw);
+               break;
+               case IA64_RNAT_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_RNAT, reg, rw);
+               break;
+       case IA64_BSPSTORE_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_RNAT, reg, rw);
+               break;
+       case IA64_PFS_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_RNAT, reg, rw);
+               break;
+       case IA64_LC_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_LC, reg, rw);
+               break;
+       case IA64_EC_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_EC, reg, rw);
+               break;
+       case IA64_FPSR_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_FPSR, reg, rw);
+               break;
+       case IA64_RSC_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_RSC, reg, rw);
+               break;
+       case IA64_CCV_REGNUM:
+               result = !unw_access_ar(info, UNW_AR_CCV, reg, rw);
+               break;
+       default:
+               result = 0;
+       }
+
+       return result;
+}
+
+void kgdb_get_reg(char *outbuffer, int regnum, struct unw_frame_info *info,
+       struct pt_regs *ptregs)
+{
+       unsigned long reg, size = 0, *mem = &reg;
+       struct ia64_fpreg freg;
+
+       if (kgdb_gr_reg(regnum, info, &reg, 0) ||
+               kgdb_gr_ptreg(regnum, ptregs, info, &reg, 0) ||
+               kgdb_br_reg(regnum, ptregs, info, &reg, 0) ||
+               kgdb_ar_reg(regnum, ptregs, info, &reg, 0))
+                       size = sizeof(reg);
+       else if (kgdb_fr_reg(regnum, NULL, ptregs, info, &reg, &freg, 0)) {
+               size = sizeof(freg);
+               mem = (unsigned long *)&freg;
+       } else if (regnum == IA64_IP_REGNUM) {
+               if (!ptregs) {
+                       unw_get_ip(info, &reg);
+                       size = sizeof(reg);
+               } else {
+                       reg = ptregs->cr_iip;
+                       size = sizeof(reg);
+               }
+       } else if (regnum == IA64_CFM_REGNUM) {
+               if (!ptregs)
+                       unw_get_cfm(info, &reg);
+               else
+                       reg = ptregs->cr_ifs;
+               size = sizeof(reg);
+       } else if (regnum == IA64_PSR_REGNUM) {
+               if (!ptregs && kgdb_usethread)
+                       ptregs = (struct pt_regs *)
+                       ((unsigned long)kgdb_usethread +
+                       IA64_STK_OFFSET) - 1;
+               if (ptregs)
+                       reg = ptregs->cr_ipsr;
+               size = sizeof(reg);
+       } else if (regnum == IA64_PR_REGNUM) {
+               if (ptregs)
+                       reg = ptregs->pr;
+               else
+                       unw_access_pr(info, &reg, 0);
+               size = sizeof(reg);
+       } else if (regnum == IA64_BSP_REGNUM) {
+               unw_get_bsp(info, &reg);
+               size = sizeof(reg);
+       }
+
+       if (size) {
+               kgdb_mem2hex((char *) mem, outbuffer, size);
+               outbuffer[size*2] = 0;
+       }
+       else
+               strcpy(outbuffer, "E0");
+
+       return;
+}
+
+void kgdb_put_reg(char *inbuffer, char *outbuffer, int regnum,
+                 struct unw_frame_info *info, struct pt_regs *ptregs)
+{
+       unsigned long reg;
+       struct ia64_fpreg freg;
+       char *ptr = inbuffer;
+
+       kgdb_hex2long(&ptr, &reg);
+       strcpy(outbuffer, "OK");
+
+       if (kgdb_gr_reg(regnum, info, &reg, 1) ||
+               kgdb_gr_ptreg(regnum, ptregs, info, &reg, 1) ||
+               kgdb_br_reg(regnum, ptregs, info, &reg, 1) ||
+               kgdb_fr_reg(regnum, inbuffer, ptregs, info, &reg, &freg, 1) ||
+               kgdb_ar_reg(regnum, ptregs, info, &reg, 1)) ;
+       else if (regnum == IA64_IP_REGNUM)
+               ptregs->cr_iip = reg;
+       else if (regnum == IA64_CFM_REGNUM)
+               ptregs->cr_ifs = reg;
+       else if (regnum == IA64_PSR_REGNUM)
+               ptregs->cr_ipsr = reg;
+       else if (regnum == IA64_PR_REGNUM)
+               ptregs->pr = reg;
+       else
+               strcpy(outbuffer, "E01");
+       return;
+}
+
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+}
+
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+}
+
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+
+}
+
+#define        MAX_HW_BREAKPOINT       (20)
+long hw_break_total_dbr, hw_break_total_ibr;
+#define        HW_BREAKPOINT   (hw_break_total_dbr + hw_break_total_ibr)
+#define        WATCH_INSTRUCTION       0x0
+#define WATCH_WRITE            0x1
+#define        WATCH_READ              0x2
+#define        WATCH_ACCESS            0x3
+
+#define        HWCAP_DBR       ((1 << WATCH_WRITE) | (1 << WATCH_READ))
+#define        HWCAP_IBR       (1 << WATCH_INSTRUCTION)
+struct hw_breakpoint {
+       unsigned enabled;
+       unsigned long capable;
+       unsigned long type;
+       unsigned long mask;
+       unsigned long addr;
+} *breakinfo;
+
+static struct hw_breakpoint hwbreaks[MAX_HW_BREAKPOINT];
+
+enum instruction_type { A, I, M, F, B, L, X, u };
+
+static enum instruction_type bundle_encoding[32][3] = {
+       {M, I, I},              /* 00 */
+       {M, I, I},              /* 01 */
+       {M, I, I},              /* 02 */
+       {M, I, I},              /* 03 */
+       {M, L, X},              /* 04 */
+       {M, L, X},              /* 05 */
+       {u, u, u},              /* 06 */
+       {u, u, u},              /* 07 */
+       {M, M, I},              /* 08 */
+       {M, M, I},              /* 09 */
+       {M, M, I},              /* 0A */
+       {M, M, I},              /* 0B */
+       {M, F, I},              /* 0C */
+       {M, F, I},              /* 0D */
+       {M, M, F},              /* 0E */
+       {M, M, F},              /* 0F */
+       {M, I, B},              /* 10 */
+       {M, I, B},              /* 11 */
+       {M, B, B},              /* 12 */
+       {M, B, B},              /* 13 */
+       {u, u, u},              /* 14 */
+       {u, u, u},              /* 15 */
+       {B, B, B},              /* 16 */
+       {B, B, B},              /* 17 */
+       {M, M, B},              /* 18 */
+       {M, M, B},              /* 19 */
+       {u, u, u},              /* 1A */
+       {u, u, u},              /* 1B */
+       {M, F, B},              /* 1C */
+       {M, F, B},              /* 1D */
+       {u, u, u},              /* 1E */
+       {u, u, u},              /* 1F */
+};
+
+int kgdb_validate_break_address(unsigned long addr)
+{
+       int error;
+       char tmp_variable[BREAK_INSTR_SIZE];
+       error = kgdb_get_mem((char *)(addr & BREAK_INSTR_ALIGN), tmp_variable,
+               BREAK_INSTR_SIZE);
+       return error;
+}
+
+int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr)
+{
+       extern unsigned long _start[];
+       unsigned long slot = addr & BREAK_INSTR_ALIGN, bundle_addr;
+       unsigned long template;
+       struct bundle {
+               struct {
+                       unsigned long long template:5;
+                       unsigned long long slot0:41;
+                       unsigned long long slot1_p0:64 - 46;
+               } quad0;
+               struct {
+                       unsigned long long slot1_p1:41 - (64 - 46);
+                       unsigned long long slot2:41;
+               } quad1;
+       } bundle;
+       int ret;
+
+       bundle_addr = addr & ~0xFULL;
+
+       if (bundle_addr == (unsigned long)_start)
+               return 0;
+
+       ret = kgdb_get_mem((char *)bundle_addr, (char *)&bundle,
+                          BREAK_INSTR_SIZE);
+       if (ret < 0)
+               return ret;
+
+       if (slot > 2)
+               slot = 0;
+
+       memcpy(saved_instr, &bundle, BREAK_INSTR_SIZE);
+       template = bundle.quad0.template;
+
+       if (slot == 1 && bundle_encoding[template][1] == L)
+               slot = 2;
+
+       switch (slot) {
+       case 0:
+               bundle.quad0.slot0 = BREAKNUM;
+               break;
+       case 1:
+               bundle.quad0.slot1_p0 = BREAKNUM;
+               bundle.quad1.slot1_p1 = (BREAKNUM >> (64 - 46));
+               break;
+       case 2:
+               bundle.quad1.slot2 = BREAKNUM;
+               break;
+       }
+
+       return kgdb_set_mem((char *)bundle_addr, (char *)&bundle,
+                           BREAK_INSTR_SIZE);
+}
+
+int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle)
+{
+       extern unsigned long _start[];
+
+       addr = addr & BREAK_INSTR_ALIGN;
+       if (addr == (unsigned long)_start)
+               return 0;
+       return kgdb_set_mem((char *)addr, (char *)bundle, BREAK_INSTR_SIZE);
+}
+
+static int hw_breakpoint_init;
+
+void do_init_hw_break(void)
+{
+       s64 status;
+       int i;
+
+       hw_breakpoint_init = 1;
+
+#ifdef CONFIG_IA64_HP_SIM
+       hw_break_total_ibr = 8;
+       hw_break_total_dbr = 8;
+       status = 0;
+#else
+       status = ia64_pal_debug_info(&hw_break_total_ibr, &hw_break_total_dbr);
+#endif
+
+       if (status) {
+               printk(KERN_INFO "do_init_hw_break: pal call failed %d\n",
+                      (int)status);
+               return;
+       }
+
+       if (HW_BREAKPOINT > MAX_HW_BREAKPOINT) {
+               printk(KERN_INFO "do_init_hw_break: %d exceeds max %d\n",
+                      (int)HW_BREAKPOINT, (int)MAX_HW_BREAKPOINT);
+
+               while ((HW_BREAKPOINT > MAX_HW_BREAKPOINT)
+                      && hw_break_total_ibr != 1)
+                       hw_break_total_ibr--;
+               while (HW_BREAKPOINT > MAX_HW_BREAKPOINT)
+                       hw_break_total_dbr--;
+       }
+
+       breakinfo = hwbreaks;
+
+       memset(breakinfo, 0, HW_BREAKPOINT * sizeof(struct hw_breakpoint));
+
+       for (i = 0; i < hw_break_total_dbr; i++)
+               breakinfo[i].capable = HWCAP_DBR;
+
+       for (; i < HW_BREAKPOINT; i++)
+               breakinfo[i].capable = HWCAP_IBR;
+
+       return;
+}
+
+void kgdb_correct_hw_break(void)
+{
+       int breakno;
+
+       if (!breakinfo)
+               return;
+
+       for (breakno = 0; breakno < HW_BREAKPOINT; breakno++) {
+               if (breakinfo[breakno].enabled) {
+                       if (breakinfo[breakno].capable & HWCAP_IBR) {
+                               int ibreakno = breakno - hw_break_total_dbr;
+                               ia64_set_ibr(ibreakno << 1,
+                                            breakinfo[breakno].addr);
+                               ia64_set_ibr((ibreakno << 1) + 1,
+                                            (~breakinfo[breakno].mask &
+                                             ((1UL << 56UL) - 1)) |
+                                             (1UL << 56UL) | (1UL << 63UL));
+                       } else {
+                               ia64_set_dbr(breakno << 1,
+                                            breakinfo[breakno].addr);
+                               ia64_set_dbr((breakno << 1) + 1,
+                                            (~breakinfo[breakno].
+                                             mask & ((1UL << 56UL) - 1)) |
+                                            (1UL << 56UL) |
+                                            (breakinfo[breakno].type << 62UL));
+                       }
+               } else {
+                       if (breakinfo[breakno].capable & HWCAP_IBR)
+                               ia64_set_ibr(((breakno -
+                                              hw_break_total_dbr) << 1) + 1,
+                                            0);
+                       else
+                               ia64_set_dbr((breakno << 1) + 1, 0);
+               }
+       }
+
+       return;
+}
+
+int hardware_breakpoint(unsigned long addr, int length, int type, int action)
+{
+       int breakno, found, watch;
+       unsigned long mask;
+       extern unsigned long _start[];
+
+       if (!hw_breakpoint_init)
+               do_init_hw_break();
+
+       if (!breakinfo)
+               return 0;
+       else if (addr == (unsigned long)_start)
+               return 1;
+
+       if (type == WATCH_ACCESS)
+               mask = HWCAP_DBR;
+       else
+               mask = 1UL << type;
+
+       for (watch = 0, found = 0, breakno = 0; breakno < HW_BREAKPOINT;
+            breakno++) {
+               if (action) {
+                       if (breakinfo[breakno].enabled
+                           || !(breakinfo[breakno].capable & mask))
+                               continue;
+                       breakinfo[breakno].enabled = 1;
+                       breakinfo[breakno].type = type;
+                       breakinfo[breakno].mask = length - 1;
+                       breakinfo[breakno].addr = addr;
+                       watch = breakno;
+               } else if (breakinfo[breakno].enabled &&
+                          ((length < 0 && breakinfo[breakno].addr == addr) ||
+                           ((breakinfo[breakno].capable & mask) &&
+                            (breakinfo[breakno].mask == (length - 1)) &&
+                            (breakinfo[breakno].addr == addr)))) {
+                       breakinfo[breakno].enabled = 0;
+                       breakinfo[breakno].type = 0UL;
+               } else
+                       continue;
+               found++;
+               if (type != WATCH_ACCESS)
+                       break;
+               else if (found == 2)
+                       break;
+               else
+                       mask = HWCAP_IBR;
+       }
+
+       if (type == WATCH_ACCESS && found == 1) {
+               breakinfo[watch].enabled = 0;
+               found = 0;
+       }
+
+       mb();
+       return found;
+}
+
+int kgdb_arch_set_hw_breakpoint(unsigned long addr, int len,
+                               enum kgdb_bptype type)
+{
+       return hardware_breakpoint(addr, len, type - '1', 1);
+}
+
+int kgdb_arch_remove_hw_breakpoint(unsigned long addr, int len,
+                                  enum kgdb_bptype type)
+{
+       return hardware_breakpoint(addr, len, type - '1', 0);
+}
+
+int kgdb_remove_hw_break(unsigned long addr)
+{
+       return hardware_breakpoint(addr, 8, WATCH_INSTRUCTION, 0);
+
+}
+
+void kgdb_remove_all_hw_break(void)
+{
+       int i;
+
+       for (i = 0; i < HW_BREAKPOINT; i++)
+               memset(&breakinfo[i], 0, sizeof(struct hw_breakpoint));
+}
+
+int kgdb_set_hw_break(unsigned long addr)
+{
+       return hardware_breakpoint(addr, 8, WATCH_INSTRUCTION, 1);
+}
+
+void kgdb_disable_hw_debug(struct pt_regs *regs)
+{
+       unsigned long hw_breakpoint_status;
+
+       hw_breakpoint_status = ia64_getreg(_IA64_REG_PSR);
+       if (hw_breakpoint_status & IA64_PSR_DB)
+               ia64_setreg(_IA64_REG_PSR_L,
+                           hw_breakpoint_status ^ IA64_PSR_DB);
+}
+
+volatile static struct smp_unw {
+       struct unw_frame_info *unw;
+       struct task_struct *task;
+} smp_unw[NR_CPUS];
+
+static int inline kgdb_get_blocked_state(struct task_struct *p,
+                                        struct unw_frame_info *unw)
+{
+       unsigned long ip;
+       int count = 0;
+
+       unw_init_from_blocked_task(unw, p);
+       ip = 0UL;
+       do {
+               if (unw_unwind(unw) < 0)
+                       return -1;
+               unw_get_ip(unw, &ip);
+               if (!in_sched_functions(ip))
+                       break;
+       } while (count++ < 16);
+
+       if (!ip)
+               return -1;
+       else
+               return 0;
+}
+
+static void inline kgdb_wait(struct pt_regs *regs)
+{
+       unsigned long hw_breakpoint_status = ia64_getreg(_IA64_REG_PSR);
+       if (hw_breakpoint_status & IA64_PSR_DB)
+               ia64_setreg(_IA64_REG_PSR_L,
+                           hw_breakpoint_status ^ IA64_PSR_DB);
+       kgdb_nmihook(smp_processor_id(), regs);
+       if (hw_breakpoint_status & IA64_PSR_DB)
+               ia64_setreg(_IA64_REG_PSR_L, hw_breakpoint_status);
+
+       return;
+}
+
+static void inline normalize(struct unw_frame_info *running,
+                            struct pt_regs *regs)
+{
+       unsigned long sp;
+
+       do {
+               unw_get_sp(running, &sp);
+               if ((sp + 0x10) >= (unsigned long)regs)
+                       break;
+       } while (unw_unwind(running) >= 0);
+
+       return;
+}
+
+static void kgdb_init_running(struct unw_frame_info *unw, void *data)
+{
+       struct pt_regs *regs;
+
+       regs = data;
+       normalize(unw, regs);
+       smp_unw[smp_processor_id()].unw = unw;
+       kgdb_wait(regs);
+}
+
+void kgdb_wait_ipi(struct pt_regs *regs)
+{
+       struct unw_frame_info unw;
+
+       smp_unw[smp_processor_id()].task = current;
+
+       if (user_mode(regs)) {
+               smp_unw[smp_processor_id()].unw = (struct unw_frame_info *)1;
+               kgdb_wait(regs);
+       } else {
+               if (current->state == TASK_RUNNING)
+                       unw_init_running(kgdb_init_running, regs);
+               else {
+                       if (kgdb_get_blocked_state(current, &unw))
+                               smp_unw[smp_processor_id()].unw =
+                                   (struct unw_frame_info *)1;
+                       else
+                               smp_unw[smp_processor_id()].unw = &unw;
+                       kgdb_wait(regs);
+               }
+       }
+
+       smp_unw[smp_processor_id()].unw = NULL;
+       return;
+}
+
+void kgdb_roundup_cpus(unsigned long flags)
+{
+       if (num_online_cpus() > 1)
+               smp_send_nmi_allbutself();
+}
+
+static volatile int kgdb_hwbreak_sstep[NR_CPUS];
+
+static int kgdb_notify(struct notifier_block *self, unsigned long cmd,
+       void *ptr)
+{
+       struct die_args *args = ptr;
+       struct pt_regs *regs = args->regs;
+       unsigned long err = args->err;
+
+       switch (cmd) {
+       default:
+               return NOTIFY_DONE;
+       case DIE_PAGE_FAULT_NO_CONTEXT:
+               if (atomic_read(&debugger_active) && kgdb_may_fault) {
+                       kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+                       return NOTIFY_STOP;
+               }
+               break;
+       case DIE_BREAK:
+               if (user_mode(regs) || err == 0x80001)
+                       return NOTIFY_DONE;
+               break;
+       case DIE_FAULT:
+               if (user_mode(regs))
+                       return NOTIFY_DONE;
+               else if (err == 36 && kgdb_hwbreak_sstep[smp_processor_id()]) {
+                       kgdb_hwbreak_sstep[smp_processor_id()] = 0;
+                       regs->cr_ipsr &= ~IA64_PSR_SS;
+                       return NOTIFY_STOP;
+               }
+       case DIE_MCA_MONARCH_PROCESS:
+       case DIE_INIT_MONARCH_PROCESS:
+               break;
+       }
+
+       kgdb_handle_exception(args->trapnr, args->signr, args->err, regs);
+       return NOTIFY_STOP;
+}
+
+static struct notifier_block kgdb_notifier = {
+       .notifier_call = kgdb_notify,
+};
+
+int kgdb_arch_init(void)
+{
+       atomic_notifier_chain_register(&ia64die_chain, &kgdb_notifier);
+       return 0;
+}
+
+static void do_kgdb_handle_exception(struct unw_frame_info *, void *data);
+
+struct kgdb_state {
+       int e_vector;
+       int signo;
+       unsigned long err_code;
+       struct pt_regs *regs;
+       struct unw_frame_info *unw;
+       char *inbuf;
+       char *outbuf;
+       int unwind;
+       int ret;
+};
+
+static void inline kgdb_pc(struct pt_regs *regs, unsigned long pc)
+{
+       regs->cr_iip = pc & ~0xf;
+       ia64_psr(regs)->ri = pc & 0x3;
+       return;
+}
+
+int kgdb_arch_handle_exception(int e_vector, int signo,
+                              int err_code, char *remcom_in_buffer,
+                              char *remcom_out_buffer,
+                              struct pt_regs *linux_regs)
+{
+       struct kgdb_state info;
+
+       info.e_vector = e_vector;
+       info.signo = signo;
+       info.err_code = err_code;
+       info.unw = (void *)0;
+       info.inbuf = remcom_in_buffer;
+       info.outbuf = remcom_out_buffer;
+       info.unwind = 0;
+       info.ret = -1;
+
+       if (remcom_in_buffer[0] == 'c' || remcom_in_buffer[0] == 's') {
+               info.regs = linux_regs;
+               do_kgdb_handle_exception(NULL, &info);
+       } else if (kgdb_usethread == current) {
+               info.regs = linux_regs;
+               info.unwind = 1;
+               unw_init_running(do_kgdb_handle_exception, &info);
+       } else if (kgdb_usethread->state != TASK_RUNNING) {
+               struct unw_frame_info unw_info;
+
+               if (kgdb_get_blocked_state(kgdb_usethread, &unw_info)) {
+                       info.ret = 1;
+                       goto bad;
+               }
+               info.regs = NULL;
+               do_kgdb_handle_exception(&unw_info, &info);
+       } else {
+               int i;
+
+               for (i = 0; i < NR_CPUS; i++)
+                       if (smp_unw[i].task == kgdb_usethread && smp_unw[i].unw
+                           && smp_unw[i].unw != (struct unw_frame_info *)1) {
+                               info.regs = NULL;
+                               do_kgdb_handle_exception(smp_unw[i].unw, &info);
+                               break;
+                       } else {
+                               info.ret = 1;
+                               goto bad;
+                       }
+       }
+
+      bad:
+       if (info.ret != -1 && remcom_in_buffer[0] == 'p') {
+               unsigned long bad = 0xbad4badbadbadbadUL;
+
+               printk("kgdb_arch_handle_exception: p packet bad (%s)\n",
+                      remcom_in_buffer);
+               kgdb_mem2hex((char *)&bad, remcom_out_buffer, sizeof(bad));
+               remcom_out_buffer[sizeof(bad) * 2] = 0;
+               info.ret = -1;
+       }
+       return info.ret;
+}
+
+/*
+ * This is done because I evidently made an incorrect 'p' encoding
+ * when my patch for gdb was committed. It was later corrected. This
+ * check supports both my wrong encoding of the register number and
+ * the correct encoding. Eventually this should be eliminated and
+ * kgdb_hex2long should be demarshalling the regnum.
+ */
+static inline int check_packet(unsigned int regnum, char *packet)
+{
+       static int check_done, swap;
+       unsigned long reglong;
+
+       if (likely(check_done)) {
+               if (swap) {
+                       kgdb_hex2long(&packet, &reglong);
+                       regnum = (int) reglong;
+               }
+
+       } else {
+               if (regnum > NUM_REGS) {
+                       kgdb_hex2long(&packet, &reglong);
+                       regnum = (int) reglong;
+                       swap = 1;
+               }
+               check_done = 1;
+       }
+       return regnum;
+}
+
+static void do_kgdb_handle_exception(struct unw_frame_info *unw_info,
+       void *data)
+{
+       long addr;
+       char *ptr;
+       unsigned long newPC;
+       int e_vector, signo;
+       unsigned long err_code;
+       struct pt_regs *linux_regs;
+       struct kgdb_state *info;
+       char *remcom_in_buffer, *remcom_out_buffer;
+
+       info = data;
+       info->unw = unw_info;
+       e_vector = info->e_vector;
+       signo = info->signo;
+       err_code = info->err_code;
+       remcom_in_buffer = info->inbuf;
+       remcom_out_buffer = info->outbuf;
+       linux_regs = info->regs;
+
+       if (info->unwind)
+               normalize(unw_info, linux_regs);
+
+       switch (remcom_in_buffer[0]) {
+       case 'p':
+               {
+                       unsigned int regnum;
+
+                       kgdb_hex2mem(&remcom_in_buffer[1], (char *)&regnum,
+                                    sizeof(regnum));
+                       regnum = check_packet(regnum, &remcom_in_buffer[1]);
+                       if (regnum >= NUM_REGS) {
+                               remcom_out_buffer[0] = 'E';
+                               remcom_out_buffer[1] = 0;
+                       } else
+                               kgdb_get_reg(remcom_out_buffer, regnum,
+                                            unw_info, linux_regs);
+                       break;
+               }
+       case 'P':
+               {
+                       unsigned int regno;
+                       long v;
+                       char *ptr;
+
+                       ptr = &remcom_in_buffer[1];
+                       if ((!kgdb_usethread || kgdb_usethread == current) &&
+                           kgdb_hex2long(&ptr, &v) &&
+                           *ptr++ == '=' && (v >= 0)) {
+                               regno = (unsigned int)v;
+                               regno = (regno >= NUM_REGS ? 0 : regno);
+                               kgdb_put_reg(ptr, remcom_out_buffer, regno,
+                                            unw_info, linux_regs);
+                       } else
+                               strcpy(remcom_out_buffer, "E01");
+                       break;
+               }
+       case 'c':
+       case 's':
+               if (e_vector == TRAP_BRKPT && err_code == KGDBBREAKNUM) {
+                       if (ia64_psr(linux_regs)->ri < 2)
+                               kgdb_pc(linux_regs, linux_regs->cr_iip +
+                                       ia64_psr(linux_regs)->ri + 1);
+                       else
+                               kgdb_pc(linux_regs, linux_regs->cr_iip + 16);
+               }
+
+               /* try to read optional parameter, pc unchanged if no parm */
+               ptr = &remcom_in_buffer[1];
+               if (kgdb_hex2long(&ptr, &addr)) {
+                       linux_regs->cr_iip = addr;
+               }
+               newPC = linux_regs->cr_iip;
+
+               /* clear the trace bit */
+               linux_regs->cr_ipsr &= ~IA64_PSR_SS;
+
+               atomic_set(&cpu_doing_single_step, -1);
+
+               /* set the trace bit if we're stepping or took a hardware break */
+               if (remcom_in_buffer[0] == 's' || e_vector == TRAP_HWBKPT) {
+                       linux_regs->cr_ipsr |= IA64_PSR_SS;
+                       debugger_step = 1;
+                       if (kgdb_contthread)
+                               atomic_set(&cpu_doing_single_step,
+                                          smp_processor_id());
+               }
+
+               kgdb_correct_hw_break();
+
+               /* if not hardware breakpoint, then reenable them */
+               if (e_vector != TRAP_HWBKPT)
+                       linux_regs->cr_ipsr |= IA64_PSR_DB;
+               else {
+                       kgdb_hwbreak_sstep[smp_processor_id()] = 1;
+                       linux_regs->cr_ipsr &= ~IA64_PSR_DB;
+               }
+
+               info->ret = 0;
+               break;
+       default:
+               break;
+       }
+
+       return;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+       .set_hw_breakpoint = kgdb_arch_set_hw_breakpoint,
+       .remove_hw_breakpoint = kgdb_arch_remove_hw_breakpoint,
+       .gdb_bpt_instr = {0xcc},
+       .flags = KGDB_HW_BREAKPOINT,
+};
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/kernel/process.c linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/process.c
--- linux-2.6.18-53.1.14/arch/ia64/kernel/process.c     2008-03-06 05:55:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/process.c        2008-06-10 15:39:39.000000000 +0400
@@ -463,6 +463,9 @@ copy_thread (int nr, unsigned long clone
         */
        child_ptregs->cr_ipsr = ((child_ptregs->cr_ipsr | IA64_PSR_BITS_TO_SET)
                                 & ~(IA64_PSR_BITS_TO_CLEAR | IA64_PSR_PP | IA64_PSR_UP));
+#ifdef CONFIG_KGDB
+       child_ptregs->cr_ipsr |= IA64_PSR_DB;
+#endif
 
        /*
         * NOTE: The calling convention considers all floating point
@@ -691,6 +694,9 @@ kernel_thread (int (*fn)(void *), void *
        regs.pt.r11 = (unsigned long) arg;      /* 2nd argument */
        /* Preserve PSR bits, except for bits 32-34 and 37-45, which we can't read.  */
        regs.pt.cr_ipsr = ia64_getreg(_IA64_REG_PSR) | IA64_PSR_BN;
+#ifdef CONFIG_KGDB
+       regs.pt.cr_ipsr |= IA64_PSR_DB;
+#endif
        regs.pt.cr_ifs = 1UL << 63;             /* mark as valid, empty frame */
        regs.sw.ar_fpsr = regs.pt.ar_fpsr = ia64_getreg(_IA64_REG_AR_FPSR);
        regs.sw.ar_bspstore = (unsigned long) current + IA64_RBS_OFFSET;
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/kernel/smp.c linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/smp.c
--- linux-2.6.18-53.1.14/arch/ia64/kernel/smp.c 2008-03-06 05:54:27.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/smp.c    2008-06-10 15:38:32.000000000 +0400
@@ -48,6 +48,7 @@
 #include <asm/tlbflush.h>
 #include <asm/unistd.h>
 #include <asm/mca.h>
+#include <linux/kgdb.h>
 
 /*
  * Structure and data for smp_call_function(). This is designed to minimise static memory
@@ -68,6 +69,9 @@ static volatile struct call_data_struct 
 #define IPI_CALL_FUNC          0
 #define IPI_CPU_STOP           1
 #define IPI_KDUMP_CPU_STOP     3
+#ifdef CONFIG_KGDB
+#define        IPI_KGDB_INTERRUPT      2
+#endif
 
 /* This needs to be cacheline aligned because it is written to by *other* CPUs.  */
 static DEFINE_PER_CPU(u64, ipi_operation) ____cacheline_aligned;
@@ -185,6 +189,11 @@ handle_IPI (int irq, void *dev_id, struc
                              case IPI_CPU_STOP:
                                stop_this_cpu();
                                break;
+#ifdef CONFIG_KGDB
+                             case IPI_KGDB_INTERRUPT:
+                               kgdb_wait_ipi(regs);
+                               break;
+#endif
 #ifdef CONFIG_CRASH_DUMP
                              case IPI_KDUMP_CPU_STOP:
                                unw_init_running(kdump_cpu_freeze, NULL);
@@ -359,6 +368,14 @@ smp_call_function_single (int cpuid, voi
 }
 EXPORT_SYMBOL(smp_call_function_single);
 
+#ifdef CONFIG_KGDB
+void
+smp_send_nmi_allbutself(void)
+{
+       send_IPI_allbutself(IPI_KGDB_INTERRUPT);
+}
+#endif
+
 /*
  * this function sends a 'generic call function' IPI to all other CPUs
  * in the system.
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/kernel/traps.c linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/traps.c
--- linux-2.6.18-53.1.14/arch/ia64/kernel/traps.c       2008-03-06 05:54:44.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/traps.c  2008-06-10 15:38:32.000000000 +0400
@@ -200,8 +200,12 @@ __kprobes ia64_bad_break (unsigned long 
                break;
 
              default:
-               if (break_num < 0x40000 || break_num > 0x100000)
+               if (break_num < 0x40000 || break_num > 0x100000) {
+                       if (notify_die(DIE_BREAK, "bad break", regs,
+                               break_num, TRAP_BRKPT, SIGTRAP) == NOTIFY_STOP)
+                               return;
                        die_if_kernel("Bad break", regs, break_num);
+               }
 
                if (break_num < 0x80000) {
                        sig = SIGILL; code = __ILL_BREAK;
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/kernel/unwind.c linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/unwind.c
--- linux-2.6.18-53.1.14/arch/ia64/kernel/unwind.c      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/kernel/unwind.c 2008-06-10 15:39:39.000000000 +0400
@@ -72,10 +72,68 @@
 # define STAT(x...)
 #endif
 
+#ifdef CONFIG_KGDB
+#define        KGDB_EARLY_SIZE 100
+static struct unw_reg_state __initdata kgdb_reg_state[KGDB_EARLY_SIZE];
+static struct unw_labeled_state __initdata kgdb_labeled_state[KGDB_EARLY_SIZE];
+void __initdata *kgdb_reg_state_free, __initdata *kgdb_labeled_state_free;
+
+static void __init
+kgdb_malloc_init(void)
+{
+       int i;
+
+       kgdb_reg_state_free = kgdb_reg_state;
+       for (i = 1; i < KGDB_EARLY_SIZE; i++) {
+               *((unsigned long *) &kgdb_reg_state[i]) = (unsigned long) kgdb_reg_state_free;
+               kgdb_reg_state_free = &kgdb_reg_state[i];
+       }
+
+       kgdb_labeled_state_free = kgdb_labeled_state;
+       for (i = 1; i < KGDB_EARLY_SIZE; i++) {
+               *((unsigned long *) &kgdb_labeled_state[i]) =
+                       (unsigned long) kgdb_labeled_state_free;
+               kgdb_labeled_state_free = &kgdb_labeled_state[i];
+       }
+
+}
+
+static void * __init
+kgdb_malloc(void **mem)
+{
+       void *p;
+
+       p = *mem;
+       *mem = *((void **) p);
+       return p;
+}
+
+static void __init
+kgdb_free(void **mem, void *p)
+{
+       *((void **)p) = *mem;
+       *mem = p;
+}
+
+#define alloc_reg_state()      (!malloc_sizes[0].cs_cachep ?           \
+               kgdb_malloc(&kgdb_reg_state_free) :                     \
+               kmalloc(sizeof(struct unw_reg_state), GFP_ATOMIC))
+#define free_reg_state(usr)    (!malloc_sizes[0].cs_cachep ?           \
+               kgdb_free(&kgdb_reg_state_free, usr) :                  \
+               kfree(usr))
+#define alloc_labeled_state()  (!malloc_sizes[0].cs_cachep ?           \
+               kgdb_malloc(&kgdb_labeled_state_free) :                 \
+               kmalloc(sizeof(struct unw_labeled_state), GFP_ATOMIC))
+#define free_labeled_state(usr)        (!malloc_sizes[0].cs_cachep ?           \
+               kgdb_free(&kgdb_labeled_state_free, usr) :              \
+               kfree(usr))
+
+#else
 #define alloc_reg_state()      kmalloc(sizeof(struct unw_reg_state), GFP_ATOMIC)
 #define free_reg_state(usr)    kfree(usr)
 #define alloc_labeled_state()  kmalloc(sizeof(struct unw_labeled_state), GFP_ATOMIC)
 #define free_labeled_state(usr)        kfree(usr)
+#endif
 
 typedef unsigned long unw_word;
 typedef unsigned char unw_hash_index_t;
@@ -238,6 +296,24 @@ static struct {
 #endif
 };
 
+#ifdef CONFIG_KGDB
+/*
+ * This makes it safe to call breakpoint() very early
+ * in setup_arch providing:
+ *     1) breakpoint isn't called between lines in cpu_init
+ *        where init_mm.mm_count is incremented and ia64_mmu_init
+ *        is called.  Otherwise the test below is invalid.
+ *     2) the memory examined doesn't result in tlbmiss.
+ */
+static unsigned long inline kgdb_unimpl_va_mask(void)
+{
+       if (atomic_read(&init_mm.mm_count) > 1)
+               return local_cpu_data->unimpl_va_mask;
+       else
+               return 0UL;
+}
+#endif
+
 static inline int
 read_only (void *addr)
 {
@@ -1786,7 +1862,11 @@ run_script (struct unw_script *script, s
 
                      case UNW_INSN_LOAD:
 #ifdef UNW_DEBUG
+#ifdef CONFIG_KGDB
+                       if ((s[val] & (kgdb_unimpl_va_mask() | 0x7)) != 0
+#else
                        if ((s[val] & (local_cpu_data->unimpl_va_mask | 0x7)) != 0
+#endif
                            || s[val] < TASK_SIZE)
                        {
                                UNW_DPRINT(0, "unwind.%s: rejecting bad psp=0x%lx\n",
@@ -1821,7 +1901,11 @@ find_save_locs (struct unw_frame_info *i
        struct unw_script *scr;
        unsigned long flags = 0;
 
+#ifdef CONFIG_KGDB
+       if ((info->ip & (kgdb_unimpl_va_mask() | 0xf)) || info->ip < TASK_SIZE) {
+#else
        if ((info->ip & (local_cpu_data->unimpl_va_mask | 0xf)) || info->ip < TASK_SIZE) {
+#endif
                /* don't let obviously bad addresses pollute the cache */
                /* FIXME: should really be level 0 but it occurs too often. KAO */
                UNW_DPRINT(1, "unwind.%s: rejecting bad ip=0x%lx\n", __FUNCTION__, info->ip);
@@ -2249,6 +2333,9 @@ unw_init (void)
 
        init_unwind_table(&unw.kernel_table, "kernel", KERNEL_START, (unsigned long) __gp,
                          __start_unwind, __end_unwind);
+#ifdef CONFIG_KGDB
+       kgdb_malloc_init();
+#endif
 }
 
 /*
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/mm/extable.c linux-2.6.18-53.1.14.kgdb/arch/ia64/mm/extable.c
--- linux-2.6.18-53.1.14/arch/ia64/mm/extable.c 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/mm/extable.c    2008-06-10 15:38:32.000000000 +0400
@@ -6,6 +6,7 @@
  */
 
 #include <linux/sort.h>
+#include <linux/kgdb.h>
 
 #include <asm/uaccess.h>
 #include <asm/module.h>
@@ -73,6 +74,11 @@ search_extable (const struct exception_t
                 else
                         last = mid - 1;
         }
+#ifdef CONFIG_KGDB
+       if (atomic_read(&debugger_active) && kgdb_may_fault)
+               kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+               /* Not reached. */
+#endif
         return NULL;
 }
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ia64/mm/fault.c linux-2.6.18-53.1.14.kgdb/arch/ia64/mm/fault.c
--- linux-2.6.18-53.1.14/arch/ia64/mm/fault.c   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ia64/mm/fault.c      2008-06-10 15:38:32.000000000 +0400
@@ -266,6 +266,10 @@ ia64_do_page_fault (unsigned long addres
         */
        bust_spinlocks(1);
 
+       if (notify_die(DIE_PAGE_FAULT_NO_CONTEXT, "no context", regs,
+                       isr, 14, SIGSEGV) == NOTIFY_STOP)
+               return;
+
        if (address < PAGE_SIZE)
                printk(KERN_ALERT "Unable to handle kernel NULL pointer dereference (address %016lx)\n", address);
        else
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/Kconfig.debug linux-2.6.18-53.1.14.kgdb/arch/mips/Kconfig.debug
--- linux-2.6.18-53.1.14/arch/mips/Kconfig.debug        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/Kconfig.debug   2008-06-10 15:38:24.000000000 +0400
@@ -37,25 +37,6 @@ config DEBUG_STACK_USAGE
 
          This option will slow down process creation somewhat.
 
-config KGDB
-       bool "Remote GDB kernel debugging"
-       depends on DEBUG_KERNEL
-       select DEBUG_INFO
-       help
-         If you say Y here, it will be possible to remotely debug the MIPS
-         kernel using gdb. This enlarges your kernel image disk size by
-         several megabytes and requires a machine with more than 16 MB,
-         better 32 MB RAM to avoid excessive linking time. This is only
-         useful for kernel hackers. If unsure, say N.
-
-config GDB_CONSOLE
-       bool "Console output to GDB"
-       depends on KGDB
-       help
-         If you are using GDB for remote debugging over a serial port and
-         would like kernel messages to be formatted into GDB $O packets so
-         that GDB prints them as program output, say 'Y'.
-
 config SB1XXX_CORELIS
        bool "Corelis Debugger"
        depends on SIBYTE_SB1xxx_SOC
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/kernel/Makefile linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/Makefile
--- linux-2.6.18-53.1.14/arch/mips/kernel/Makefile      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/Makefile 2008-06-10 15:38:24.000000000 +0400
@@ -59,7 +59,8 @@ obj-$(CONFIG_MIPS32_COMPAT)   += linux32.o
 obj-$(CONFIG_MIPS32_N32)       += binfmt_elfn32.o scall64-n32.o signal_n32.o
 obj-$(CONFIG_MIPS32_O32)       += binfmt_elfo32.o scall64-o32.o ptrace32.o
 
-obj-$(CONFIG_KGDB)             += gdb-low.o gdb-stub.o
+obj-$(CONFIG_KGDB)             += kgdb_handler.o kgdb.o kgdb-jmp.o     \
+                                       kgdb-setjmp.o
 obj-$(CONFIG_PROC_FS)          += proc.o
 
 obj-$(CONFIG_64BIT)            += cpu-bugs64.o
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/kernel/gdb-low.S linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/gdb-low.S
--- linux-2.6.18-53.1.14/arch/mips/kernel/gdb-low.S     2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/gdb-low.S        1970-01-01 03:00:00.000000000 +0300
@@ -1,394 +0,0 @@
-/*
- * gdb-low.S contains the low-level trap handler for the GDB stub.
- *
- * Copyright (C) 1995 Andreas Busse
- */
-#include <linux/sys.h>
-
-#include <asm/asm.h>
-#include <asm/errno.h>
-#include <asm/irqflags.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/gdb-stub.h>
-
-#ifdef CONFIG_32BIT
-#define DMFC0  mfc0
-#define DMTC0  mtc0
-#define LDC1   lwc1
-#define SDC1   lwc1
-#endif
-#ifdef CONFIG_64BIT
-#define DMFC0  dmfc0
-#define DMTC0  dmtc0
-#define LDC1   ldc1
-#define SDC1   ldc1
-#endif
-
-/*
- * [jsun] We reserves about 2x GDB_FR_SIZE in stack.  The lower (addressed)
- * part is used to store registers and passed to exception handler.
- * The upper part is reserved for "call func" feature where gdb client
- * saves some of the regs, setups call frame and passes args.
- *
- * A trace shows about 200 bytes are used to store about half of all regs.
- * The rest should be big enough for frame setup and passing args.
- */
-
-/*
- * The low level trap handler
- */
-               .align  5
-               NESTED(trap_low, GDB_FR_SIZE, sp)
-               .set    noat
-               .set    noreorder
-
-               mfc0    k0, CP0_STATUS
-               sll     k0, 3                   /* extract cu0 bit */
-               bltz    k0, 1f
-               move    k1, sp
-
-               /*
-                * Called from user mode, go somewhere else.
-                */
-               mfc0    k0, CP0_CAUSE
-               andi    k0, k0, 0x7c
-#ifdef CONFIG_64BIT
-               dsll    k0, k0, 1
-#endif
-               PTR_L   k1, saved_vectors(k0)
-               jr      k1
-               nop
-1:
-               move    k0, sp
-               PTR_SUBU sp, k1, GDB_FR_SIZE*2  # see comment above
-               LONG_S  k0, GDB_FR_REG29(sp)
-               LONG_S  $2, GDB_FR_REG2(sp)
-
-/*
- * First save the CP0 and special registers
- */
-
-               mfc0    v0, CP0_STATUS
-               LONG_S  v0, GDB_FR_STATUS(sp)
-               mfc0    v0, CP0_CAUSE
-               LONG_S  v0, GDB_FR_CAUSE(sp)
-               DMFC0   v0, CP0_EPC
-               LONG_S  v0, GDB_FR_EPC(sp)
-               DMFC0   v0, CP0_BADVADDR
-               LONG_S  v0, GDB_FR_BADVADDR(sp)
-               mfhi    v0
-               LONG_S  v0, GDB_FR_HI(sp)
-               mflo    v0
-               LONG_S  v0, GDB_FR_LO(sp)
-
-/*
- * Now the integer registers
- */
-
-               LONG_S  zero, GDB_FR_REG0(sp)           /* I know... */
-               LONG_S  $1, GDB_FR_REG1(sp)
-               /* v0 already saved */
-               LONG_S  $3, GDB_FR_REG3(sp)
-               LONG_S  $4, GDB_FR_REG4(sp)
-               LONG_S  $5, GDB_FR_REG5(sp)
-               LONG_S  $6, GDB_FR_REG6(sp)
-               LONG_S  $7, GDB_FR_REG7(sp)
-               LONG_S  $8, GDB_FR_REG8(sp)
-               LONG_S  $9, GDB_FR_REG9(sp)
-               LONG_S  $10, GDB_FR_REG10(sp)
-               LONG_S  $11, GDB_FR_REG11(sp)
-               LONG_S  $12, GDB_FR_REG12(sp)
-               LONG_S  $13, GDB_FR_REG13(sp)
-               LONG_S  $14, GDB_FR_REG14(sp)
-               LONG_S  $15, GDB_FR_REG15(sp)
-               LONG_S  $16, GDB_FR_REG16(sp)
-               LONG_S  $17, GDB_FR_REG17(sp)
-               LONG_S  $18, GDB_FR_REG18(sp)
-               LONG_S  $19, GDB_FR_REG19(sp)
-               LONG_S  $20, GDB_FR_REG20(sp)
-               LONG_S  $21, GDB_FR_REG21(sp)
-               LONG_S  $22, GDB_FR_REG22(sp)
-               LONG_S  $23, GDB_FR_REG23(sp)
-               LONG_S  $24, GDB_FR_REG24(sp)
-               LONG_S  $25, GDB_FR_REG25(sp)
-               LONG_S  $26, GDB_FR_REG26(sp)
-               LONG_S  $27, GDB_FR_REG27(sp)
-               LONG_S  $28, GDB_FR_REG28(sp)
-               /* sp already saved */
-               LONG_S  $30, GDB_FR_REG30(sp)
-               LONG_S  $31, GDB_FR_REG31(sp)
-
-               CLI                             /* disable interrupts */
-               TRACE_IRQS_OFF
-
-/*
- * Followed by the floating point registers
- */
-               mfc0    v0, CP0_STATUS          /* FPU enabled? */
-               srl     v0, v0, 16
-               andi    v0, v0, (ST0_CU1 >> 16)
-
-               beqz    v0,2f                   /* disabled, skip */
-                nop
-
-               SDC1    $0, GDB_FR_FPR0(sp)
-               SDC1    $1, GDB_FR_FPR1(sp)
-               SDC1    $2, GDB_FR_FPR2(sp)
-               SDC1    $3, GDB_FR_FPR3(sp)
-               SDC1    $4, GDB_FR_FPR4(sp)
-               SDC1    $5, GDB_FR_FPR5(sp)
-               SDC1    $6, GDB_FR_FPR6(sp)
-               SDC1    $7, GDB_FR_FPR7(sp)
-               SDC1    $8, GDB_FR_FPR8(sp)
-               SDC1    $9, GDB_FR_FPR9(sp)
-               SDC1    $10, GDB_FR_FPR10(sp)
-               SDC1    $11, GDB_FR_FPR11(sp)
-               SDC1    $12, GDB_FR_FPR12(sp)
-               SDC1    $13, GDB_FR_FPR13(sp)
-               SDC1    $14, GDB_FR_FPR14(sp)
-               SDC1    $15, GDB_FR_FPR15(sp)
-               SDC1    $16, GDB_FR_FPR16(sp)
-               SDC1    $17, GDB_FR_FPR17(sp)
-               SDC1    $18, GDB_FR_FPR18(sp)
-               SDC1    $19, GDB_FR_FPR19(sp)
-               SDC1    $20, GDB_FR_FPR20(sp)
-               SDC1    $21, GDB_FR_FPR21(sp)
-               SDC1    $22, GDB_FR_FPR22(sp)
-               SDC1    $23, GDB_FR_FPR23(sp)
-               SDC1    $24, GDB_FR_FPR24(sp)
-               SDC1    $25, GDB_FR_FPR25(sp)
-               SDC1    $26, GDB_FR_FPR26(sp)
-               SDC1    $27, GDB_FR_FPR27(sp)
-               SDC1    $28, GDB_FR_FPR28(sp)
-               SDC1    $29, GDB_FR_FPR29(sp)
-               SDC1    $30, GDB_FR_FPR30(sp)
-               SDC1    $31, GDB_FR_FPR31(sp)
-
-/*
- * FPU control registers
- */
-
-               cfc1    v0, CP1_STATUS
-               LONG_S  v0, GDB_FR_FSR(sp)
-               cfc1    v0, CP1_REVISION
-               LONG_S  v0, GDB_FR_FIR(sp)
-
-/*
- * Current stack frame ptr
- */
-
-2:
-               LONG_S  sp, GDB_FR_FRP(sp)
-
-/*
- * CP0 registers (R4000/R4400 unused registers skipped)
- */
-
-               mfc0    v0, CP0_INDEX
-               LONG_S  v0, GDB_FR_CP0_INDEX(sp)
-               mfc0    v0, CP0_RANDOM
-               LONG_S  v0, GDB_FR_CP0_RANDOM(sp)
-               DMFC0   v0, CP0_ENTRYLO0
-               LONG_S  v0, GDB_FR_CP0_ENTRYLO0(sp)
-               DMFC0   v0, CP0_ENTRYLO1
-               LONG_S  v0, GDB_FR_CP0_ENTRYLO1(sp)
-               DMFC0   v0, CP0_CONTEXT
-               LONG_S  v0, GDB_FR_CP0_CONTEXT(sp)
-               mfc0    v0, CP0_PAGEMASK
-               LONG_S  v0, GDB_FR_CP0_PAGEMASK(sp)
-               mfc0    v0, CP0_WIRED
-               LONG_S  v0, GDB_FR_CP0_WIRED(sp)
-               DMFC0   v0, CP0_ENTRYHI
-               LONG_S  v0, GDB_FR_CP0_ENTRYHI(sp)
-               mfc0    v0, CP0_PRID
-               LONG_S  v0, GDB_FR_CP0_PRID(sp)
-
-               .set    at
-
-/*
- * Continue with the higher level handler
- */
-
-               move    a0,sp
-
-               jal     handle_exception
-                nop
-
-/*
- * Restore all writable registers, in reverse order
- */
-
-               .set    noat
-
-               LONG_L  v0, GDB_FR_CP0_ENTRYHI(sp)
-               LONG_L  v1, GDB_FR_CP0_WIRED(sp)
-               DMTC0   v0, CP0_ENTRYHI
-               mtc0    v1, CP0_WIRED
-               LONG_L  v0, GDB_FR_CP0_PAGEMASK(sp)
-               LONG_L  v1, GDB_FR_CP0_ENTRYLO1(sp)
-               mtc0    v0, CP0_PAGEMASK
-               DMTC0   v1, CP0_ENTRYLO1
-               LONG_L  v0, GDB_FR_CP0_ENTRYLO0(sp)
-               LONG_L  v1, GDB_FR_CP0_INDEX(sp)
-               DMTC0   v0, CP0_ENTRYLO0
-               LONG_L  v0, GDB_FR_CP0_CONTEXT(sp)
-               mtc0    v1, CP0_INDEX
-               DMTC0   v0, CP0_CONTEXT
-
-
-/*
- * Next, the floating point registers
- */
-               mfc0    v0, CP0_STATUS          /* check if the FPU is enabled */
-               srl     v0, v0, 16
-               andi    v0, v0, (ST0_CU1 >> 16)
-
-               beqz    v0, 3f                  /* disabled, skip */
-                nop
-
-               LDC1    $31, GDB_FR_FPR31(sp)
-               LDC1    $30, GDB_FR_FPR30(sp)
-               LDC1    $29, GDB_FR_FPR29(sp)
-               LDC1    $28, GDB_FR_FPR28(sp)
-               LDC1    $27, GDB_FR_FPR27(sp)
-               LDC1    $26, GDB_FR_FPR26(sp)
-               LDC1    $25, GDB_FR_FPR25(sp)
-               LDC1    $24, GDB_FR_FPR24(sp)
-               LDC1    $23, GDB_FR_FPR23(sp)
-               LDC1    $22, GDB_FR_FPR22(sp)
-               LDC1    $21, GDB_FR_FPR21(sp)
-               LDC1    $20, GDB_FR_FPR20(sp)
-               LDC1    $19, GDB_FR_FPR19(sp)
-               LDC1    $18, GDB_FR_FPR18(sp)
-               LDC1    $17, GDB_FR_FPR17(sp)
-               LDC1    $16, GDB_FR_FPR16(sp)
-               LDC1    $15, GDB_FR_FPR15(sp)
-               LDC1    $14, GDB_FR_FPR14(sp)
-               LDC1    $13, GDB_FR_FPR13(sp)
-               LDC1    $12, GDB_FR_FPR12(sp)
-               LDC1    $11, GDB_FR_FPR11(sp)
-               LDC1    $10, GDB_FR_FPR10(sp)
-               LDC1    $9, GDB_FR_FPR9(sp)
-               LDC1    $8, GDB_FR_FPR8(sp)
-               LDC1    $7, GDB_FR_FPR7(sp)
-               LDC1    $6, GDB_FR_FPR6(sp)
-               LDC1    $5, GDB_FR_FPR5(sp)
-               LDC1    $4, GDB_FR_FPR4(sp)
-               LDC1    $3, GDB_FR_FPR3(sp)
-               LDC1    $2, GDB_FR_FPR2(sp)
-               LDC1    $1, GDB_FR_FPR1(sp)
-               LDC1    $0, GDB_FR_FPR0(sp)
-
-/*
- * Now the CP0 and integer registers
- */
-
-3:
-#ifdef CONFIG_MIPS_MT_SMTC
-               /* Read-modify write of Status must be atomic */
-               mfc0    t2, CP0_TCSTATUS
-               ori     t1, t2, TCSTATUS_IXMT
-               mtc0    t1, CP0_TCSTATUS
-               andi    t2, t2, TCSTATUS_IXMT
-               _ehb
-               DMT     9                               # dmt   t1
-               jal     mips_ihb
-               nop
-#endif /* CONFIG_MIPS_MT_SMTC */
-               mfc0    t0, CP0_STATUS
-               ori     t0, 0x1f
-               xori    t0, 0x1f
-               mtc0    t0, CP0_STATUS
-#ifdef CONFIG_MIPS_MT_SMTC
-               andi    t1, t1, VPECONTROL_TE
-               beqz    t1, 9f
-               nop
-               EMT                                     # emt
-9:
-               mfc0    t1, CP0_TCSTATUS
-               xori    t1, t1, TCSTATUS_IXMT
-               or      t1, t1, t2
-               mtc0    t1, CP0_TCSTATUS
-               _ehb
-#endif /* CONFIG_MIPS_MT_SMTC */
-               LONG_L  v0, GDB_FR_STATUS(sp)
-               LONG_L  v1, GDB_FR_EPC(sp)
-               mtc0    v0, CP0_STATUS
-               DMTC0   v1, CP0_EPC
-               LONG_L  v0, GDB_FR_HI(sp)
-               LONG_L  v1, GDB_FR_LO(sp)
-               mthi    v0
-               mtlo    v1
-               LONG_L  $31, GDB_FR_REG31(sp)
-               LONG_L  $30, GDB_FR_REG30(sp)
-               LONG_L  $28, GDB_FR_REG28(sp)
-               LONG_L  $27, GDB_FR_REG27(sp)
-               LONG_L  $26, GDB_FR_REG26(sp)
-               LONG_L  $25, GDB_FR_REG25(sp)
-               LONG_L  $24, GDB_FR_REG24(sp)
-               LONG_L  $23, GDB_FR_REG23(sp)
-               LONG_L  $22, GDB_FR_REG22(sp)
-               LONG_L  $21, GDB_FR_REG21(sp)
-               LONG_L  $20, GDB_FR_REG20(sp)
-               LONG_L  $19, GDB_FR_REG19(sp)
-               LONG_L  $18, GDB_FR_REG18(sp)
-               LONG_L  $17, GDB_FR_REG17(sp)
-               LONG_L  $16, GDB_FR_REG16(sp)
-               LONG_L  $15, GDB_FR_REG15(sp)
-               LONG_L  $14, GDB_FR_REG14(sp)
-               LONG_L  $13, GDB_FR_REG13(sp)
-               LONG_L  $12, GDB_FR_REG12(sp)
-               LONG_L  $11, GDB_FR_REG11(sp)
-               LONG_L  $10, GDB_FR_REG10(sp)
-               LONG_L  $9, GDB_FR_REG9(sp)
-               LONG_L  $8, GDB_FR_REG8(sp)
-               LONG_L  $7, GDB_FR_REG7(sp)
-               LONG_L  $6, GDB_FR_REG6(sp)
-               LONG_L  $5, GDB_FR_REG5(sp)
-               LONG_L  $4, GDB_FR_REG4(sp)
-               LONG_L  $3, GDB_FR_REG3(sp)
-               LONG_L  $2, GDB_FR_REG2(sp)
-               LONG_L  $1, GDB_FR_REG1(sp)
-#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
-               LONG_L  k0, GDB_FR_EPC(sp)
-               LONG_L  $29, GDB_FR_REG29(sp)           /* Deallocate stack */
-               jr      k0
-               rfe
-#else
-               LONG_L  sp, GDB_FR_REG29(sp)            /* Deallocate stack */
-
-               .set    mips3
-               eret
-               .set    mips0
-#endif
-               .set    at
-               .set    reorder
-               END(trap_low)
-
-LEAF(kgdb_read_byte)
-4:             lb      t0, (a0)
-               sb      t0, (a1)
-               li      v0, 0
-               jr      ra
-               .section __ex_table,"a"
-               PTR     4b, kgdbfault
-               .previous
-               END(kgdb_read_byte)
-
-LEAF(kgdb_write_byte)
-5:             sb      a0, (a1)
-               li      v0, 0
-               jr      ra
-               .section __ex_table,"a"
-               PTR     5b, kgdbfault
-               .previous
-               END(kgdb_write_byte)
-
-               .type   kgdbfault@function
-               .ent    kgdbfault
-
-kgdbfault:     li      v0, -EFAULT
-               jr      ra
-               .end    kgdbfault
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/kernel/gdb-stub.c linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/gdb-stub.c
--- linux-2.6.18-53.1.14/arch/mips/kernel/gdb-stub.c    2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/gdb-stub.c       1970-01-01 03:00:00.000000000 +0300
@@ -1,1154 +0,0 @@
-/*
- *  arch/mips/kernel/gdb-stub.c
- *
- *  Originally written by Glenn Engel, Lake Stevens Instrument Division
- *
- *  Contributed by HP Systems
- *
- *  Modified for SPARC by Stu Grossman, Cygnus Support.
- *
- *  Modified for Linux/MIPS (and MIPS in general) by Andreas Busse
- *  Send complaints, suggestions etc. to <andy@waldorf-gmbh.de>
- *
- *  Copyright (C) 1995 Andreas Busse
- *
- *  Copyright (C) 2003 MontaVista Software Inc.
- *  Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
- */
-
-/*
- *  To enable debugger support, two things need to happen.  One, a
- *  call to set_debug_traps() is necessary in order to allow any breakpoints
- *  or error conditions to be properly intercepted and reported to gdb.
- *  Two, a breakpoint needs to be generated to begin communication.  This
- *  is most easily accomplished by a call to breakpoint().  Breakpoint()
- *  simulates a breakpoint by executing a BREAK instruction.
- *
- *
- *    The following gdb commands are supported:
- *
- * command          function                               Return value
- *
- *    g             return the value of the CPU registers  hex data or ENN
- *    G             set the value of the CPU registers     OK or ENN
- *
- *    mAA..AA,LLLL  Read LLLL bytes at address AA..AA      hex data or ENN
- *    MAA..AA,LLLL: Write LLLL bytes at address AA.AA      OK or ENN
- *
- *    c             Resume at current address              SNN   ( signal NN)
- *    cAA..AA       Continue at address AA..AA             SNN
- *
- *    s             Step one instruction                   SNN
- *    sAA..AA       Step one instruction from AA..AA       SNN
- *
- *    k             kill
- *
- *    ?             What was the last sigval ?             SNN   (signal NN)
- *
- *    bBB..BB      Set baud rate to BB..BB                OK or BNN, then sets
- *                                                        baud rate
- *
- * All commands and responses are sent with a packet which includes a
- * checksum.  A packet consists of
- *
- * $<packet info>#<checksum>.
- *
- * where
- * <packet info> :: <characters representing the command or response>
- * <checksum>    :: < two hex digits computed as modulo 256 sum of <packetinfo>>
- *
- * When a packet is received, it is first acknowledged with either '+' or '-'.
- * '+' indicates a successful transfer.  '-' indicates a failed transfer.
- *
- * Example:
- *
- * Host:                  Reply:
- * $m0,10#2a               +$00010203040506070809101112131415#42
- *
- *
- *  ==============
- *  MORE EXAMPLES:
- *  ==============
- *
- *  For reference -- the following are the steps that one
- *  company took (RidgeRun Inc) to get remote gdb debugging
- *  going. In this scenario the host machine was a PC and the
- *  target platform was a Galileo EVB64120A MIPS evaluation
- *  board.
- *
- *  Step 1:
- *  First download gdb-5.0.tar.gz from the internet.
- *  and then build/install the package.
- *
- *  Example:
- *    $ tar zxf gdb-5.0.tar.gz
- *    $ cd gdb-5.0
- *    $ ./configure --target=mips-linux-elf
- *    $ make
- *    $ install
- *    $ which mips-linux-elf-gdb
- *    /usr/local/bin/mips-linux-elf-gdb
- *
- *  Step 2:
- *  Configure linux for remote debugging and build it.
- *
- *  Example:
- *    $ cd ~/linux
- *    $ make menuconfig <go to "Kernel Hacking" and turn on remote debugging>
- *    $ make
- *
- *  Step 3:
- *  Download the kernel to the remote target and start
- *  the kernel running. It will promptly halt and wait
- *  for the host gdb session to connect. It does this
- *  since the "Kernel Hacking" option has defined
- *  CONFIG_KGDB which in turn enables your calls
- *  to:
- *     set_debug_traps();
- *     breakpoint();
- *
- *  Step 4:
- *  Start the gdb session on the host.
- *
- *  Example:
- *    $ mips-linux-elf-gdb vmlinux
- *    (gdb) set remotebaud 115200
- *    (gdb) target remote /dev/ttyS1
- *    ...at this point you are connected to
- *       the remote target and can use gdb
- *       in the normal fasion. Setting
- *       breakpoints, single stepping,
- *       printing variables, etc.
- */
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/reboot.h>
-
-#include <asm/asm.h>
-#include <asm/cacheflush.h>
-#include <asm/mipsregs.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/gdb-stub.h>
-#include <asm/inst.h>
-#include <asm/smp.h>
-
-/*
- * external low-level support routines
- */
-
-extern int putDebugChar(char c);    /* write a single character      */
-extern char getDebugChar(void);     /* read and return a single char */
-extern void trap_low(void);
-
-/*
- * breakpoint and test functions
- */
-extern void breakpoint(void);
-extern void breakinst(void);
-extern void async_breakpoint(void);
-extern void async_breakinst(void);
-extern void adel(void);
-
-/*
- * local prototypes
- */
-
-static void getpacket(char *buffer);
-static void putpacket(char *buffer);
-static int computeSignal(int tt);
-static int hex(unsigned char ch);
-static int hexToInt(char **ptr, int *intValue);
-static int hexToLong(char **ptr, long *longValue);
-static unsigned char *mem2hex(char *mem, char *buf, int count, int may_fault);
-void handle_exception(struct gdb_regs *regs);
-
-int kgdb_enabled;
-
-/*
- * spin locks for smp case
- */
-static DEFINE_SPINLOCK(kgdb_lock);
-static raw_spinlock_t kgdb_cpulock[NR_CPUS] = {
-       [0 ... NR_CPUS-1] = __RAW_SPIN_LOCK_UNLOCKED,
-};
-
-/*
- * BUFMAX defines the maximum number of characters in inbound/outbound buffers
- * at least NUMREGBYTES*2 are needed for register packets
- */
-#define BUFMAX 2048
-
-static char input_buffer[BUFMAX];
-static char output_buffer[BUFMAX];
-static int initialized;        /* !0 means we've been initialized */
-static int kgdb_started;
-static const char hexchars[]="0123456789abcdef";
-
-/* Used to prevent crashes in memory access.  Note that they'll crash anyway if
-   we haven't set up fault handlers yet... */
-int kgdb_read_byte(unsigned char *address, unsigned char *dest);
-int kgdb_write_byte(unsigned char val, unsigned char *dest);
-
-/*
- * Convert ch from a hex digit to an int
- */
-static int hex(unsigned char ch)
-{
-       if (ch >= 'a' && ch <= 'f')
-               return ch-'a'+10;
-       if (ch >= '0' && ch <= '9')
-               return ch-'0';
-       if (ch >= 'A' && ch <= 'F')
-               return ch-'A'+10;
-       return -1;
-}
-
-/*
- * scan for the sequence $<data>#<checksum>
- */
-static void getpacket(char *buffer)
-{
-       unsigned char checksum;
-       unsigned char xmitcsum;
-       int i;
-       int count;
-       unsigned char ch;
-
-       do {
-               /*
-                * wait around for the start character,
-                * ignore all other characters
-                */
-               while ((ch = (getDebugChar() & 0x7f)) != '$') ;
-
-               checksum = 0;
-               xmitcsum = -1;
-               count = 0;
-
-               /*
-                * now, read until a # or end of buffer is found
-                */
-               while (count < BUFMAX) {
-                       ch = getDebugChar();
-                       if (ch == '#')
-                               break;
-                       checksum = checksum + ch;
-                       buffer[count] = ch;
-                       count = count + 1;
-               }
-
-               if (count >= BUFMAX)
-                       continue;
-
-               buffer[count] = 0;
-
-               if (ch == '#') {
-                       xmitcsum = hex(getDebugChar() & 0x7f) << 4;
-                       xmitcsum |= hex(getDebugChar() & 0x7f);
-
-                       if (checksum != xmitcsum)
-                               putDebugChar('-');      /* failed checksum */
-                       else {
-                               putDebugChar('+'); /* successful transfer */
-
-                               /*
-                                * if a sequence char is present,
-                                * reply the sequence ID
-                                */
-                               if (buffer[2] == ':') {
-                                       putDebugChar(buffer[0]);
-                                       putDebugChar(buffer[1]);
-
-                                       /*
-                                        * remove sequence chars from buffer
-                                        */
-                                       count = strlen(buffer);
-                                       for (i=3; i <= count; i++)
-                                               buffer[i-3] = buffer[i];
-                               }
-                       }
-               }
-       }
-       while (checksum != xmitcsum);
-}
-
-/*
- * send the packet in buffer.
- */
-static void putpacket(char *buffer)
-{
-       unsigned char checksum;
-       int count;
-       unsigned char ch;
-
-       /*
-        * $<packet info>#<checksum>.
-        */
-
-       do {
-               putDebugChar('$');
-               checksum = 0;
-               count = 0;
-
-               while ((ch = buffer[count]) != 0) {
-                       if (!(putDebugChar(ch)))
-                               return;
-                       checksum += ch;
-                       count += 1;
-               }
-
-               putDebugChar('#');
-               putDebugChar(hexchars[checksum >> 4]);
-               putDebugChar(hexchars[checksum & 0xf]);
-
-       }
-       while ((getDebugChar() & 0x7f) != '+');
-}
-
-
-/*
- * Convert the memory pointed to by mem into hex, placing result in buf.
- * Return a pointer to the last char put in buf (null), in case of mem fault,
- * return 0.
- * may_fault is non-zero if we are reading from arbitrary memory, but is currently
- * not used.
- */
-static unsigned char *mem2hex(char *mem, char *buf, int count, int may_fault)
-{
-       unsigned char ch;
-
-       while (count-- > 0) {
-               if (kgdb_read_byte(mem++, &ch) != 0)
-                       return 0;
-               *buf++ = hexchars[ch >> 4];
-               *buf++ = hexchars[ch & 0xf];
-       }
-
-       *buf = 0;
-
-       return buf;
-}
-
-/*
- * convert the hex array pointed to by buf into binary to be placed in mem
- * return a pointer to the character AFTER the last byte written
- * may_fault is non-zero if we are reading from arbitrary memory, but is currently
- * not used.
- */
-static char *hex2mem(char *buf, char *mem, int count, int binary, int may_fault)
-{
-       int i;
-       unsigned char ch;
-
-       for (i=0; i<count; i++)
-       {
-               if (binary) {
-                       ch = *buf++;
-                       if (ch == 0x7d)
-                               ch = 0x20 ^ *buf++;
-               }
-               else {
-                       ch = hex(*buf++) << 4;
-                       ch |= hex(*buf++);
-               }
-               if (kgdb_write_byte(ch, mem++) != 0)
-                       return 0;
-       }
-
-       return mem;
-}
-
-/*
- * This table contains the mapping between SPARC hardware trap types, and
- * signals, which are primarily what GDB understands.  It also indicates
- * which hardware traps we need to commandeer when initializing the stub.
- */
-static struct hard_trap_info {
-       unsigned char tt;               /* Trap type code for MIPS R3xxx and R4xxx */
-       unsigned char signo;            /* Signal that we map this trap into */
-} hard_trap_info[] = {
-       { 6, SIGBUS },                  /* instruction bus error */
-       { 7, SIGBUS },                  /* data bus error */
-       { 9, SIGTRAP },                 /* break */
-       { 10, SIGILL },                 /* reserved instruction */
-/*     { 11, SIGILL },         */      /* CPU unusable */
-       { 12, SIGFPE },                 /* overflow */
-       { 13, SIGTRAP },                /* trap */
-       { 14, SIGSEGV },                /* virtual instruction cache coherency */
-       { 15, SIGFPE },                 /* floating point exception */
-       { 23, SIGSEGV },                /* watch */
-       { 31, SIGSEGV },                /* virtual data cache coherency */
-       { 0, 0}                         /* Must be last */
-};
-
-/* Save the normal trap handlers for user-mode traps. */
-void *saved_vectors[32];
-
-/*
- * Set up exception handlers for tracing and breakpoints
- */
-void set_debug_traps(void)
-{
-       struct hard_trap_info *ht;
-       unsigned long flags;
-       unsigned char c;
-
-       local_irq_save(flags);
-       for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
-               saved_vectors[ht->tt] = set_except_vector(ht->tt, trap_low);
-
-       putDebugChar('+'); /* 'hello world' */
-       /*
-        * In case GDB is started before us, ack any packets
-        * (presumably "$?#xx") sitting there.
-        */
-       while((c = getDebugChar()) != '$');
-       while((c = getDebugChar()) != '#');
-       c = getDebugChar(); /* eat first csum byte */
-       c = getDebugChar(); /* eat second csum byte */
-       putDebugChar('+'); /* ack it */
-
-       initialized = 1;
-       local_irq_restore(flags);
-}
-
-void restore_debug_traps(void)
-{
-       struct hard_trap_info *ht;
-       unsigned long flags;
-
-       local_irq_save(flags);
-       for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
-               set_except_vector(ht->tt, saved_vectors[ht->tt]);
-       local_irq_restore(flags);
-}
-
-/*
- * Convert the MIPS hardware trap type code to a Unix signal number.
- */
-static int computeSignal(int tt)
-{
-       struct hard_trap_info *ht;
-
-       for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
-               if (ht->tt == tt)
-                       return ht->signo;
-
-       return SIGHUP;          /* default for things we don't know about */
-}
-
-/*
- * While we find nice hex chars, build an int.
- * Return number of chars processed.
- */
-static int hexToInt(char **ptr, int *intValue)
-{
-       int numChars = 0;
-       int hexValue;
-
-       *intValue = 0;
-
-       while (**ptr) {
-               hexValue = hex(**ptr);
-               if (hexValue < 0)
-                       break;
-
-               *intValue = (*intValue << 4) | hexValue;
-               numChars ++;
-
-               (*ptr)++;
-       }
-
-       return (numChars);
-}
-
-static int hexToLong(char **ptr, long *longValue)
-{
-       int numChars = 0;
-       int hexValue;
-
-       *longValue = 0;
-
-       while (**ptr) {
-               hexValue = hex(**ptr);
-               if (hexValue < 0)
-                       break;
-
-               *longValue = (*longValue << 4) | hexValue;
-               numChars ++;
-
-               (*ptr)++;
-       }
-
-       return numChars;
-}
-
-
-#if 0
-/*
- * Print registers (on target console)
- * Used only to debug the stub...
- */
-void show_gdbregs(struct gdb_regs * regs)
-{
-       /*
-        * Saved main processor registers
-        */
-       printk("$0 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
-              regs->reg0, regs->reg1, regs->reg2, regs->reg3,
-               regs->reg4, regs->reg5, regs->reg6, regs->reg7);
-       printk("$8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
-              regs->reg8, regs->reg9, regs->reg10, regs->reg11,
-               regs->reg12, regs->reg13, regs->reg14, regs->reg15);
-       printk("$16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
-              regs->reg16, regs->reg17, regs->reg18, regs->reg19,
-               regs->reg20, regs->reg21, regs->reg22, regs->reg23);
-       printk("$24: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
-              regs->reg24, regs->reg25, regs->reg26, regs->reg27,
-              regs->reg28, regs->reg29, regs->reg30, regs->reg31);
-
-       /*
-        * Saved cp0 registers
-        */
-       printk("epc  : %08lx\nStatus: %08lx\nCause : %08lx\n",
-              regs->cp0_epc, regs->cp0_status, regs->cp0_cause);
-}
-#endif /* dead code */
-
-/*
- * We single-step by setting breakpoints. When an exception
- * is handled, we need to restore the instructions hoisted
- * when the breakpoints were set.
- *
- * This is where we save the original instructions.
- */
-static struct gdb_bp_save {
-       unsigned long addr;
-       unsigned int val;
-} step_bp[2];
-
-#define BP 0x0000000d  /* break opcode */
-
-/*
- * Set breakpoint instructions for single stepping.
- */
-static void single_step(struct gdb_regs *regs)
-{
-       union mips_instruction insn;
-       unsigned long targ;
-       int is_branch, is_cond, i;
-
-       targ = regs->cp0_epc;
-       insn.word = *(unsigned int *)targ;
-       is_branch = is_cond = 0;
-
-       switch (insn.i_format.opcode) {
-       /*
-        * jr and jalr are in r_format format.
-        */
-       case spec_op:
-               switch (insn.r_format.func) {
-               case jalr_op:
-               case jr_op:
-                       targ = *(&regs->reg0 + insn.r_format.rs);
-                       is_branch = 1;
-                       break;
-               }
-               break;
-
-       /*
-        * This group contains:
-        * bltz_op, bgez_op, bltzl_op, bgezl_op,
-        * bltzal_op, bgezal_op, bltzall_op, bgezall_op.
-        */
-       case bcond_op:
-               is_branch = is_cond = 1;
-               targ += 4 + (insn.i_format.simmediate << 2);
-               break;
-
-       /*
-        * These are unconditional and in j_format.
-        */
-       case jal_op:
-       case j_op:
-               is_branch = 1;
-               targ += 4;
-               targ >>= 28;
-               targ <<= 28;
-               targ |= (insn.j_format.target << 2);
-               break;
-
-       /*
-        * These are conditional.
-        */
-       case beq_op:
-       case beql_op:
-       case bne_op:
-       case bnel_op:
-       case blez_op:
-       case blezl_op:
-       case bgtz_op:
-       case bgtzl_op:
-       case cop0_op:
-       case cop1_op:
-       case cop2_op:
-       case cop1x_op:
-               is_branch = is_cond = 1;
-               targ += 4 + (insn.i_format.simmediate << 2);
-               break;
-       }
-
-       if (is_branch) {
-               i = 0;
-               if (is_cond && targ != (regs->cp0_epc + 8)) {
-                       step_bp[i].addr = regs->cp0_epc + 8;
-                       step_bp[i++].val = *(unsigned *)(regs->cp0_epc + 8);
-                       *(unsigned *)(regs->cp0_epc + 8) = BP;
-               }
-               step_bp[i].addr = targ;
-               step_bp[i].val  = *(unsigned *)targ;
-               *(unsigned *)targ = BP;
-       } else {
-               step_bp[0].addr = regs->cp0_epc + 4;
-               step_bp[0].val  = *(unsigned *)(regs->cp0_epc + 4);
-               *(unsigned *)(regs->cp0_epc + 4) = BP;
-       }
-}
-
-/*
- *  If asynchronously interrupted by gdb, then we need to set a breakpoint
- *  at the interrupted instruction so that we wind up stopped with a
- *  reasonable stack frame.
- */
-static struct gdb_bp_save async_bp;
-
-/*
- * Swap the interrupted EPC with our asynchronous breakpoint routine.
- * This is safer than stuffing the breakpoint in-place, since no cache
- * flushes (or resulting smp_call_functions) are required.  The
- * assumption is that only one CPU will be handling asynchronous bp's,
- * and only one can be active at a time.
- */
-extern spinlock_t smp_call_lock;
-
-void set_async_breakpoint(unsigned long *epc)
-{
-       /* skip breaking into userland */
-       if ((*epc & 0x80000000) == 0)
-               return;
-
-#ifdef CONFIG_SMP
-       /* avoid deadlock if someone is make IPC */
-       if (spin_is_locked(&smp_call_lock))
-               return;
-#endif
-
-       async_bp.addr = *epc;
-       *epc = (unsigned long)async_breakpoint;
-}
-
-static void kgdb_wait(void *arg)
-{
-       unsigned flags;
-       int cpu = smp_processor_id();
-
-       local_irq_save(flags);
-
-       __raw_spin_lock(&kgdb_cpulock[cpu]);
-       __raw_spin_unlock(&kgdb_cpulock[cpu]);
-
-       local_irq_restore(flags);
-}
-
-/*
- * GDB stub needs to call kgdb_wait on all processor with interrupts
- * disabled, so it uses it's own special variant.
- */
-static int kgdb_smp_call_kgdb_wait(void)
-{
-#ifdef CONFIG_SMP
-       struct call_data_struct data;
-       int i, cpus = num_online_cpus() - 1;
-       int cpu = smp_processor_id();
-
-       /*
-        * Can die spectacularly if this CPU isn't yet marked online
-        */
-       BUG_ON(!cpu_online(cpu));
-
-       if (!cpus)
-               return 0;
-
-       if (spin_is_locked(&smp_call_lock)) {
-               /*
-                * Some other processor is trying to make us do something
-                * but we're not going to respond... give up
-                */
-               return -1;
-               }
-
-       /*
-        * We will continue here, accepting the fact that
-        * the kernel may deadlock if another CPU attempts
-        * to call smp_call_function now...
-        */
-
-       data.func = kgdb_wait;
-       data.info = NULL;
-       atomic_set(&data.started, 0);
-       data.wait = 0;
-
-       spin_lock(&smp_call_lock);
-       call_data = &data;
-       mb();
-
-       /* Send a message to all other CPUs and wait for them to respond */
-       for (i = 0; i < NR_CPUS; i++)
-               if (cpu_online(i) && i != cpu)
-                       core_send_ipi(i, SMP_CALL_FUNCTION);
-
-       /* Wait for response */
-       /* FIXME: lock-up detection, backtrace on lock-up */
-       while (atomic_read(&data.started) != cpus)
-               barrier();
-
-       call_data = NULL;
-       spin_unlock(&smp_call_lock);
-#endif
-
-       return 0;
-}
-
-/*
- * This function does all command processing for interfacing to gdb.  It
- * returns 1 if you should skip the instruction at the trap address, 0
- * otherwise.
- */
-void handle_exception (struct gdb_regs *regs)
-{
-       int trap;                       /* Trap type */
-       int sigval;
-       long addr;
-       int length;
-       char *ptr;
-       unsigned long *stack;
-       int i;
-       int bflag = 0;
-
-       kgdb_started = 1;
-
-       /*
-        * acquire the big kgdb spinlock
-        */
-       if (!spin_trylock(&kgdb_lock)) {
-               /*
-                * some other CPU has the lock, we should go back to
-                * receive the gdb_wait IPC
-                */
-               return;
-       }
-
-       /*
-        * If we're in async_breakpoint(), restore the real EPC from
-        * the breakpoint.
-        */
-       if (regs->cp0_epc == (unsigned long)async_breakinst) {
-               regs->cp0_epc = async_bp.addr;
-               async_bp.addr = 0;
-       }
-
-       /*
-        * acquire the CPU spinlocks
-        */
-       for (i = num_online_cpus()-1; i >= 0; i--)
-               if (__raw_spin_trylock(&kgdb_cpulock[i]) == 0)
-                       panic("kgdb: couldn't get cpulock %d\n", i);
-
-       /*
-        * force other cpus to enter kgdb
-        */
-       kgdb_smp_call_kgdb_wait();
-
-       /*
-        * If we're in breakpoint() increment the PC
-        */
-       trap = (regs->cp0_cause & 0x7c) >> 2;
-       if (trap == 9 && regs->cp0_epc == (unsigned long)breakinst)
-               regs->cp0_epc += 4;
-
-       /*
-        * If we were single_stepping, restore the opcodes hoisted
-        * for the breakpoint[s].
-        */
-       if (step_bp[0].addr) {
-               *(unsigned *)step_bp[0].addr = step_bp[0].val;
-               step_bp[0].addr = 0;
-
-               if (step_bp[1].addr) {
-                       *(unsigned *)step_bp[1].addr = step_bp[1].val;
-                       step_bp[1].addr = 0;
-               }
-       }
-
-       stack = (long *)regs->reg29;                    /* stack ptr */
-       sigval = computeSignal(trap);
-
-       /*
-        * reply to host that an exception has occurred
-        */
-       ptr = output_buffer;
-
-       /*
-        * Send trap type (converted to signal)
-        */
-       *ptr++ = 'T';
-       *ptr++ = hexchars[sigval >> 4];
-       *ptr++ = hexchars[sigval & 0xf];
-
-       /*
-        * Send Error PC
-        */
-       *ptr++ = hexchars[REG_EPC >> 4];
-       *ptr++ = hexchars[REG_EPC & 0xf];
-       *ptr++ = ':';
-       ptr = mem2hex((char *)&regs->cp0_epc, ptr, sizeof(long), 0);
-       *ptr++ = ';';
-
-       /*
-        * Send frame pointer
-        */
-       *ptr++ = hexchars[REG_FP >> 4];
-       *ptr++ = hexchars[REG_FP & 0xf];
-       *ptr++ = ':';
-       ptr = mem2hex((char *)&regs->reg30, ptr, sizeof(long), 0);
-       *ptr++ = ';';
-
-       /*
-        * Send stack pointer
-        */
-       *ptr++ = hexchars[REG_SP >> 4];
-       *ptr++ = hexchars[REG_SP & 0xf];
-       *ptr++ = ':';
-       ptr = mem2hex((char *)&regs->reg29, ptr, sizeof(long), 0);
-       *ptr++ = ';';
-
-       *ptr++ = 0;
-       putpacket(output_buffer);       /* send it off... */
-
-       /*
-        * Wait for input from remote GDB
-        */
-       while (1) {
-               output_buffer[0] = 0;
-               getpacket(input_buffer);
-
-               switch (input_buffer[0])
-               {
-               case '?':
-                       output_buffer[0] = 'S';
-                       output_buffer[1] = hexchars[sigval >> 4];
-                       output_buffer[2] = hexchars[sigval & 0xf];
-                       output_buffer[3] = 0;
-                       break;
-
-               /*
-                * Detach debugger; let CPU run
-                */
-               case 'D':
-                       putpacket(output_buffer);
-                       goto finish_kgdb;
-                       break;
-
-               case 'd':
-                       /* toggle debug flag */
-                       break;
-
-               /*
-                * Return the value of the CPU registers
-                */
-               case 'g':
-                       ptr = output_buffer;
-                       ptr = mem2hex((char *)&regs->reg0, ptr, 32*sizeof(long), 0); /* r0...r31 */
-                       ptr = mem2hex((char *)&regs->cp0_status, ptr, 6*sizeof(long), 0); /* cp0 */
-                       ptr = mem2hex((char *)&regs->fpr0, ptr, 32*sizeof(long), 0); /* f0...31 */
-                       ptr = mem2hex((char *)&regs->cp1_fsr, ptr, 2*sizeof(long), 0); /* cp1 */
-                       ptr = mem2hex((char *)&regs->frame_ptr, ptr, 2*sizeof(long), 0); /* frp */
-                       ptr = mem2hex((char *)&regs->cp0_index, ptr, 16*sizeof(long), 0); /* cp0 */
-                       break;
-
-               /*
-                * set the value of the CPU registers - return OK
-                */
-               case 'G':
-               {
-                       ptr = &input_buffer[1];
-                       hex2mem(ptr, (char *)&regs->reg0, 32*sizeof(long), 0, 0);
-                       ptr += 32*(2*sizeof(long));
-                       hex2mem(ptr, (char *)&regs->cp0_status, 6*sizeof(long), 0, 0);
-                       ptr += 6*(2*sizeof(long));
-                       hex2mem(ptr, (char *)&regs->fpr0, 32*sizeof(long), 0, 0);
-                       ptr += 32*(2*sizeof(long));
-                       hex2mem(ptr, (char *)&regs->cp1_fsr, 2*sizeof(long), 0, 0);
-                       ptr += 2*(2*sizeof(long));
-                       hex2mem(ptr, (char *)&regs->frame_ptr, 2*sizeof(long), 0, 0);
-                       ptr += 2*(2*sizeof(long));
-                       hex2mem(ptr, (char *)&regs->cp0_index, 16*sizeof(long), 0, 0);
-                       strcpy(output_buffer,"OK");
-                }
-               break;
-
-               /*
-                * mAA..AA,LLLL  Read LLLL bytes at address AA..AA
-                */
-               case 'm':
-                       ptr = &input_buffer[1];
-
-                       if (hexToLong(&ptr, &addr)
-                               && *ptr++ == ','
-                               && hexToInt(&ptr, &length)) {
-                               if (mem2hex((char *)addr, output_buffer, length, 1))
-                                       break;
-                               strcpy (output_buffer, "E03");
-                       } else
-                               strcpy(output_buffer,"E01");
-                       break;
-
-               /*
-                * XAA..AA,LLLL: Write LLLL escaped binary bytes at address AA.AA
-                */
-               case 'X':
-                       bflag = 1;
-                       /* fall through */
-
-               /*
-                * MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK
-                */
-               case 'M':
-                       ptr = &input_buffer[1];
-
-                       if (hexToLong(&ptr, &addr)
-                               && *ptr++ == ','
-                               && hexToInt(&ptr, &length)
-                               && *ptr++ == ':') {
-                               if (hex2mem(ptr, (char *)addr, length, bflag, 1))
-                                       strcpy(output_buffer, "OK");
-                               else
-                                       strcpy(output_buffer, "E03");
-                       }
-                       else
-                               strcpy(output_buffer, "E02");
-                       break;
-
-               /*
-                * cAA..AA    Continue at address AA..AA(optional)
-                */
-               case 'c':
-                       /* try to read optional parameter, pc unchanged if no parm */
-
-                       ptr = &input_buffer[1];
-                       if (hexToLong(&ptr, &addr))
-                               regs->cp0_epc = addr;
-
-                       goto exit_kgdb_exception;
-                       break;
-
-               /*
-                * kill the program; let us try to restart the machine
-                * Reset the whole machine.
-                */
-               case 'k':
-               case 'r':
-                       machine_restart("kgdb restarts machine");
-                       break;
-
-               /*
-                * Step to next instruction
-                */
-               case 's':
-                       /*
-                        * There is no single step insn in the MIPS ISA, so we
-                        * use breakpoints and continue, instead.
-                        */
-                       single_step(regs);
-                       goto exit_kgdb_exception;
-                       /* NOTREACHED */
-                       break;
-
-               /*
-                * Set baud rate (bBB)
-                * FIXME: Needs to be written
-                */
-               case 'b':
-               {
-#if 0
-                       int baudrate;
-                       extern void set_timer_3();
-
-                       ptr = &input_buffer[1];
-                       if (!hexToInt(&ptr, &baudrate))
-                       {
-                               strcpy(output_buffer,"B01");
-                               break;
-                       }
-
-                       /* Convert baud rate to uart clock divider */
-
-                       switch (baudrate)
-                       {
-                               case 38400:
-                                       baudrate = 16;
-                                       break;
-                               case 19200:
-                                       baudrate = 33;
-                                       break;
-                               case 9600:
-                                       baudrate = 65;
-                                       break;
-                               default:
-                                       baudrate = 0;
-                                       strcpy(output_buffer,"B02");
-                                       goto x1;
-                       }
-
-                       if (baudrate) {
-                               putpacket("OK");        /* Ack before changing speed */
-                               set_timer_3(baudrate); /* Set it */
-                       }
-#endif
-               }
-               break;
-
-               }                       /* switch */
-
-               /*
-                * reply to the request
-                */
-
-               putpacket(output_buffer);
-
-       } /* while */
-
-       return;
-
-finish_kgdb:
-       restore_debug_traps();
-
-exit_kgdb_exception:
-       /* release locks so other CPUs can go */
-       for (i = num_online_cpus()-1; i >= 0; i--)
-               __raw_spin_unlock(&kgdb_cpulock[i]);
-       spin_unlock(&kgdb_lock);
-
-       __flush_cache_all();
-       return;
-}
-
-/*
- * This function will generate a breakpoint exception.  It is used at the
- * beginning of a program to sync up with a debugger and can be used
- * otherwise as a quick means to stop program execution and "break" into
- * the debugger.
- */
-void breakpoint(void)
-{
-       if (!initialized)
-               return;
-
-       __asm__ __volatile__(
-                       ".globl breakinst\n\t"
-                       ".set\tnoreorder\n\t"
-                       "nop\n"
-                       "breakinst:\tbreak\n\t"
-                       "nop\n\t"
-                       ".set\treorder"
-                       );
-}
-
-/* Nothing but the break; don't pollute any registers */
-void async_breakpoint(void)
-{
-       __asm__ __volatile__(
-                       ".globl async_breakinst\n\t"
-                       ".set\tnoreorder\n\t"
-                       "nop\n"
-                       "async_breakinst:\tbreak\n\t"
-                       "nop\n\t"
-                       ".set\treorder"
-                       );
-}
-
-void adel(void)
-{
-       __asm__ __volatile__(
-                       ".globl\tadel\n\t"
-                       "lui\t$8,0x8000\n\t"
-                       "lw\t$9,1($8)\n\t"
-                       );
-}
-
-/*
- * malloc is needed by gdb client in "call func()", even a private one
- * will make gdb happy
- */
-static void * __attribute_used__ malloc(size_t size)
-{
-       return kmalloc(size, GFP_ATOMIC);
-}
-
-static void __attribute_used__ free (void *where)
-{
-       kfree(where);
-}
-
-#ifdef CONFIG_GDB_CONSOLE
-
-void gdb_putsn(const char *str, int l)
-{
-       char outbuf[18];
-
-       if (!kgdb_started)
-               return;
-
-       outbuf[0]='O';
-
-       while(l) {
-               int i = (l>8)?8:l;
-               mem2hex((char *)str, &outbuf[1], i, 0);
-               outbuf[(i*2)+1]=0;
-               putpacket(outbuf);
-               str += i;
-               l -= i;
-       }
-}
-
-static void gdb_console_write(struct console *con, const char *s, unsigned n)
-{
-       gdb_putsn(s, n);
-}
-
-static struct console gdb_console = {
-       .name   = "gdb",
-       .write  = gdb_console_write,
-       .flags  = CON_PRINTBUFFER,
-       .index  = -1
-};
-
-static int __init register_gdb_console(void)
-{
-       register_console(&gdb_console);
-
-       return 0;
-}
-
-console_initcall(register_gdb_console);
-
-#endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/kernel/irq.c linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/irq.c
--- linux-2.6.18-53.1.14/arch/mips/kernel/irq.c 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/irq.c    2008-06-10 15:38:24.000000000 +0400
@@ -25,6 +25,10 @@
 #include <asm/atomic.h>
 #include <asm/system.h>
 #include <asm/uaccess.h>
+#include <asm/kgdb.h>
+
+/* Keep track of if we've done certain initialization already or not. */
+int kgdb_early_setup;
 
 /*
  * 'what should we do if we get a hw irq event on an illegal vector'.
@@ -115,23 +119,13 @@ asmlinkage void spurious_interrupt(struc
        atomic_inc(&irq_err_count);
 }
 
-#ifdef CONFIG_KGDB
-extern void breakpoint(void);
-extern void set_debug_traps(void);
-
-static int kgdb_flag = 1;
-static int __init nokgdb(char *str)
-{
-       kgdb_flag = 0;
-       return 1;
-}
-__setup("nokgdb", nokgdb);
-#endif
-
 void __init init_IRQ(void)
 {
        int i;
 
+       if (kgdb_early_setup)
+               return;
+
        for (i = 0; i < NR_IRQS; i++) {
                irq_desc[i].status  = IRQ_DISABLED;
                irq_desc[i].action  = NULL;
@@ -144,12 +138,12 @@ void __init init_IRQ(void)
        }
 
        arch_init_irq();
-
 #ifdef CONFIG_KGDB
-       if (kgdb_flag) {
-               printk("Wait for gdb client connection ...\n");
-               set_debug_traps();
-               breakpoint();
-       }
+       /*
+        * We have been called before kgdb_arch_init(). Hence,
+        * we dont want the traps to be reinitialized
+        */
+       if (kgdb_early_setup == 0)
+               kgdb_early_setup = 1;
 #endif
 }
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/kernel/kgdb-jmp.c linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/kgdb-jmp.c
--- linux-2.6.18-53.1.14/arch/mips/kernel/kgdb-jmp.c    1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/kgdb-jmp.c       2008-06-10 15:38:24.000000000 +0400
@@ -0,0 +1,116 @@
+/*
+ * arch/mips/kernel/kgdb-jmp.c
+ *
+ * Save and restore system registers so that within a limited frame we
+ * may have a fault and "jump back" to a known safe location.
+ *
+ * Author: Tom Rini <trini@kernel.crashing.org>
+ * Author: Manish Lachwani <mlachwani@mvista.com>
+ *
+ * Cribbed from glibc, which carries the following:
+ * Copyright (C) 1996, 1997, 2000, 2002, 2003 Free Software Foundation, Inc.
+ * Copyright (C) 2005 by MontaVista Software.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program as licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include <linux/kgdb.h>
+#include <asm/interrupt.h>
+
+#ifdef CONFIG_MIPS64
+/*
+ * MIPS 64-bit
+ */
+
+int kgdb_fault_setjmp_aux(unsigned long *curr_context, int sp, int fp)
+{
+       __asm__ __volatile__ ("sd $gp, %0" : : "m" (curr_context[0]));
+       __asm__ __volatile__ ("sd $16, %0" : : "m" (curr_context[1]));
+       __asm__ __volatile__ ("sd $17, %0" : : "m" (curr_context[2]));
+       __asm__ __volatile__ ("sd $18, %0" : : "m" (curr_context[3]));
+       __asm__ __volatile__ ("sd $19, %0" : : "m" (curr_context[4]));
+       __asm__ __volatile__ ("sd $20, %0" : : "m" (curr_context[5]));
+       __asm__ __volatile__ ("sd $21, %0" : : "m" (curr_context[6]));
+       __asm__ __volatile__ ("sd $22, %0" : : "m" (curr_context[7]));
+       __asm__ __volatile__ ("sd $23, %0" : : "m" (curr_context[8]));
+       __asm__ __volatile__ ("sd $31, %0" : : "m" (curr_context[9]));
+       curr_context[10] = (long *)sp;
+       curr_context[11] = (long *)fp;
+
+       return 0;
+}
+
+void kgdb_fault_longjmp(unsigned long *curr_context)
+{
+       unsigned long sp_val, fp_val;
+
+       __asm__ __volatile__ ("ld $gp, %0" : : "m" (curr_context[0]));
+       __asm__ __volatile__ ("ld $16, %0" : : "m" (curr_context[1]));
+       __asm__ __volatile__ ("ld $17, %0" : : "m" (curr_context[2]));
+       __asm__ __volatile__ ("ld $18, %0" : : "m" (curr_context[3]));
+       __asm__ __volatile__ ("ld $19, %0" : : "m" (curr_context[4]));
+       __asm__ __volatile__ ("ld $20, %0" : : "m" (curr_context[5]));
+       __asm__ __volatile__ ("ld $21, %0" : : "m" (curr_context[6]));
+       __asm__ __volatile__ ("ld $22, %0" : : "m" (curr_context[7]));
+       __asm__ __volatile__ ("ld $23, %0" : : "m" (curr_context[8]));
+       __asm__ __volatile__ ("ld $25, %0" : : "m" (curr_context[9]));
+       sp_val = curr_context[10];
+       fp_val = curr_context[11];
+       __asm__ __volatile__ ("ld $29, %0\n\t"
+                             "ld $30, %1\n\t" : : "m" (sp_val), "m" (fp_val));
+
+       __asm__ __volatile__ ("dli $2, 1");
+       __asm__ __volatile__ ("j $25");
+
+       for (;;);
+}
+#else
+/*
+ * MIPS 32-bit
+ */
+
+int kgdb_fault_setjmp_aux(unsigned long *curr_context, int sp, int fp)
+{
+       __asm__ __volatile__("sw $gp, %0" : : "m" (curr_context[0]));
+       __asm__ __volatile__("sw $16, %0" : : "m" (curr_context[1]));
+       __asm__ __volatile__("sw $17, %0" : : "m" (curr_context[2]));
+       __asm__ __volatile__("sw $18, %0" : : "m" (curr_context[3]));
+       __asm__ __volatile__("sw $19, %0" : : "m" (curr_context[4]));
+       __asm__ __volatile__("sw $20, %0" : : "m" (curr_context[5]));
+       __asm__ __volatile__("sw $21, %0" : : "m" (curr_context[6]));
+       __asm__ __volatile__("sw $22, %0" : : "m" (curr_context[7]));
+       __asm__ __volatile__("sw $23, %0" : : "m" (curr_context[8]));
+       __asm__ __volatile__("sw $31, %0" : : "m" (curr_context[9]));
+       curr_context[10] = (long *)sp;
+       curr_context[11] = (long *)fp;
+
+       return 0;
+}
+
+void kgdb_fault_longjmp(unsigned long *curr_context)
+{
+       unsigned long sp_val, fp_val;
+
+       __asm__ __volatile__("lw $gp, %0" : : "m" (curr_context[0]));
+       __asm__ __volatile__("lw $16, %0" : : "m" (curr_context[1]));
+       __asm__ __volatile__("lw $17, %0" : : "m" (curr_context[2]));
+       __asm__ __volatile__("lw $18, %0" : : "m" (curr_context[3]));
+       __asm__ __volatile__("lw $19, %0" : : "m" (curr_context[4]));
+       __asm__ __volatile__("lw $20, %0" : : "m" (curr_context[5]));
+       __asm__ __volatile__("lw $21, %0" : : "m" (curr_context[6]));
+       __asm__ __volatile__("lw $22, %0" : : "m" (curr_context[7]));
+       __asm__ __volatile__("lw $23, %0" : : "m" (curr_context[8]));
+       __asm__ __volatile__("lw $25, %0" : : "m" (curr_context[9]));
+       sp_val = curr_context[10];
+       fp_val = curr_context[11];
+       __asm__ __volatile__("lw $29, %0\n\t"
+                             "lw $30, %1\n\t" : : "m" (sp_val), "m" (fp_val));
+
+       __asm__ __volatile__("li $2, 1");
+       __asm__ __volatile__("jr $25");
+
+       for (;;);
+}
+#endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/kernel/kgdb-setjmp.S linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/kgdb-setjmp.S
--- linux-2.6.18-53.1.14/arch/mips/kernel/kgdb-setjmp.S 1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/kgdb-setjmp.S    2008-06-10 15:38:24.000000000 +0400
@@ -0,0 +1,28 @@
+/*
+ * arch/mips/kernel/kgdb-jmp.c
+ *
+ * Save and restore system registers so that within a limited frame we
+ * may have a fault and "jump back" to a known safe location.
+ *
+ * Copyright (C) 2005 by MontaVista Software.
+ * Author: Manish Lachwani (mlachwani@mvista.com)
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program as licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+       .ent    kgdb_fault_setjmp,0
+ENTRY (kgdb_fault_setjmp)
+       move    a1, sp
+       move    a2, fp
+#ifdef CONFIG_MIPS64
+       nop
+#endif
+       j       kgdb_fault_setjmp_aux
+       .end    kgdb_fault_setjmp
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/kernel/kgdb.c linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/kgdb.c
--- linux-2.6.18-53.1.14/arch/mips/kernel/kgdb.c        1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/kgdb.c   2008-06-10 15:38:24.000000000 +0400
@@ -0,0 +1,297 @@
+/*
+ * arch/mips/kernel/kgdb.c
+ *
+ *  Originally written by Glenn Engel, Lake Stevens Instrument Division
+ *
+ *  Contributed by HP Systems
+ *
+ *  Modified for SPARC by Stu Grossman, Cygnus Support.
+ *
+ *  Modified for Linux/MIPS (and MIPS in general) by Andreas Busse
+ *  Send complaints, suggestions etc. to <andy@waldorf-gmbh.de>
+ *
+ *  Copyright (C) 1995 Andreas Busse
+ *
+ *  Copyright (C) 2003 MontaVista Software Inc.
+ *  Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ *  Copyright (C) 2004-2005 MontaVista Software Inc.
+ *  Author: Manish Lachwani, mlachwani@mvista.com or manish@koffee-break.com
+ *
+ *  This file is licensed under the terms of the GNU General Public License
+ *  version 2. This program is licensed "as is" without any warranty of any
+ *  kind, whether express or implied.
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <asm/system.h>
+#include <asm/ptrace.h>                /* for linux pt_regs struct */
+#include <linux/kgdb.h>
+#include <linux/init.h>
+#include <asm/inst.h>
+#include <asm/gdb-stub.h>
+#include <asm/cacheflush.h>
+#include <asm/kdebug.h>
+
+static struct hard_trap_info {
+       unsigned char tt;       /* Trap type code for MIPS R3xxx and R4xxx */
+       unsigned char signo;    /* Signal that we map this trap into */
+} hard_trap_info[] = {
+       { 6, SIGBUS },          /* instruction bus error */
+       { 7, SIGBUS },          /* data bus error */
+       { 9, SIGTRAP },         /* break */
+/*     { 11, SIGILL }, */      /* CPU unusable */
+       { 12, SIGFPE },         /* overflow */
+       { 13, SIGTRAP },        /* trap */
+       { 14, SIGSEGV },        /* virtual instruction cache coherency */
+       { 15, SIGFPE },         /* floating point exception */
+       { 23, SIGSEGV },        /* watch */
+       { 31, SIGSEGV },        /* virtual data cache coherency */
+       { 0, 0}                 /* Must be last */
+};
+
+/* Save the normal trap handlers for user-mode traps. */
+void *saved_vectors[32];
+
+extern void trap_low(void);
+extern void breakinst(void);
+extern void init_IRQ(void);
+
+void kgdb_call_nmi_hook(void *ignored)
+{
+       kgdb_nmihook(smp_processor_id(), (void *)0);
+}
+
+void kgdb_roundup_cpus(unsigned long flags)
+{
+       local_irq_restore(flags);
+       smp_call_function(kgdb_call_nmi_hook, 0, 0, 0);
+       local_irq_save(flags);
+}
+
+static int compute_signal(int tt)
+{
+       struct hard_trap_info *ht;
+
+       for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+               if (ht->tt == tt)
+                       return ht->signo;
+
+       return SIGHUP;          /* default for things we don't know about */
+}
+
+/*
+ * Set up exception handlers for tracing and breakpoints
+ */
+void handle_exception(struct pt_regs *regs)
+{
+       int trap = (regs->cp0_cause & 0x7c) >> 2;
+
+       if (fixup_exception(regs)) {
+               return;
+       }
+
+       if (atomic_read(&debugger_active))
+               kgdb_nmihook(smp_processor_id(), regs);
+
+       if (atomic_read(&kgdb_setting_breakpoint))
+               if ((trap == 9) && (regs->cp0_epc == (unsigned long)breakinst))
+                       regs->cp0_epc += 4;
+
+       kgdb_handle_exception(0, compute_signal(trap), 0, regs);
+
+       /* In SMP mode, __flush_cache_all does IPI */
+       __flush_cache_all();
+}
+
+void set_debug_traps(void)
+{
+       struct hard_trap_info *ht;
+       unsigned long flags;
+
+       local_irq_save(flags);
+
+       for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+               saved_vectors[ht->tt] = set_except_vector(ht->tt, trap_low);
+
+       local_irq_restore(flags);
+}
+
+#if 0
+/* This should be called before we exit kgdb_handle_exception() I believe.
+ * -- Tom
+ */
+void restore_debug_traps(void)
+{
+       struct hard_trap_info *ht;
+       unsigned long flags;
+
+       local_irq_save(flags);
+       for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+               set_except_vector(ht->tt, saved_vectors[ht->tt]);
+       local_irq_restore(flags);
+}
+#endif
+
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+       int reg;
+       gdb_reg_t *ptr = (gdb_reg_t*)gdb_regs;
+
+       for (reg = 0; reg < 32; reg++)
+               *(ptr++) = regs->regs[reg];
+
+       *(ptr++) = regs->cp0_status;
+       *(ptr++) = regs->lo;
+       *(ptr++) = regs->hi;
+       *(ptr++) = regs->cp0_badvaddr;
+       *(ptr++) = regs->cp0_cause;
+       *(ptr++) = regs->cp0_epc;
+
+       return;
+}
+
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+
+       int reg;
+       const gdb_reg_t *ptr = (gdb_reg_t*)gdb_regs;
+
+       for (reg = 0; reg < 32; reg++)
+               regs->regs[reg] = *(ptr++);
+
+       regs->cp0_status = *(ptr++);
+       regs->lo = *(ptr++);
+       regs->hi = *(ptr++);
+       regs->cp0_badvaddr = *(ptr++);
+       regs->cp0_cause = *(ptr++);
+       regs->cp0_epc = *(ptr++);
+
+       return;
+}
+
+/*
+ * Similar to regs_to_gdb_regs() except that process is sleeping and so
+ * we may not be able to get all the info.
+ */
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+       int reg;
+       struct thread_info *ti = p->thread_info;
+       unsigned long ksp = (unsigned long)ti + THREAD_SIZE - 32;
+       struct pt_regs *regs = (struct pt_regs *)ksp - 1;
+       gdb_reg_t *ptr = (gdb_reg_t*)gdb_regs;
+
+       for (reg = 0; reg < 16; reg++)
+               *(ptr++) = regs->regs[reg];
+
+       /* S0 - S7 */
+       for (reg = 16; reg < 24; reg++)
+               *(ptr++) = regs->regs[reg];
+
+       for (reg = 24; reg < 28; reg++)
+               *(ptr++) = 0;
+
+       /* GP, SP, FP, RA */
+       for (reg = 28; reg < 32; reg++)
+               *(ptr++) = regs->regs[reg];
+
+       *(ptr++) = regs->cp0_status;
+       *(ptr++) = regs->lo;
+       *(ptr++) = regs->hi;
+       *(ptr++) = regs->cp0_badvaddr;
+       *(ptr++) = regs->cp0_cause;
+       *(ptr++) = regs->cp0_epc;
+
+       return;
+}
+
+/*
+ * Calls linux_debug_hook before the kernel dies. If KGDB is enabled,
+ * then try to fall into the debugger
+ */
+static int kgdb_mips_notify(struct notifier_block *self, unsigned long cmd,
+                           void *ptr)
+{
+       struct die_args *args = (struct die_args *)ptr;
+       struct pt_regs *regs = args->regs;
+       int trap = (regs->cp0_cause & 0x7c) >> 2;
+
+       /* See if KGDB is interested. */
+       if (user_mode(regs))
+               /* Userpace events, ignore. */
+               return NOTIFY_DONE;
+
+       kgdb_handle_exception(trap, compute_signal(trap), 0, regs);
+       return NOTIFY_OK;
+}
+
+static struct notifier_block kgdb_notifier = {
+       .notifier_call = kgdb_mips_notify,
+};
+
+/*
+ * Handle the 's' and 'c' commands
+ */
+int kgdb_arch_handle_exception(int vector, int signo, int err_code,
+                              char *remcom_in_buffer, char *remcom_out_buffer,
+                              struct pt_regs *regs)
+{
+       char *ptr;
+       unsigned long address;
+       int cpu = smp_processor_id();
+
+       switch (remcom_in_buffer[0]) {
+       case 's':
+       case 'c':
+               /* handle the optional parameter */
+               ptr = &remcom_in_buffer[1];
+               if (kgdb_hex2long(&ptr, &address))
+                       regs->cp0_epc = address;
+
+               atomic_set(&cpu_doing_single_step, -1);
+               if (remcom_in_buffer[0] == 's')
+                       if (kgdb_contthread)
+                               atomic_set(&cpu_doing_single_step, cpu);
+
+               return 0;
+       }
+
+       return -1;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+       .gdb_bpt_instr = {0xd},
+#else
+       .gdb_bpt_instr = {0x00, 0x00, 0x00, 0x0d},
+#endif
+};
+
+/*
+ * We use kgdb_early_setup so that functions we need to call now don't
+ * cause trouble when called again later.
+ */
+int kgdb_arch_init(void)
+{
+       /* Board-specifics. */
+       /* Force some calls to happen earlier. */
+       if (kgdb_early_setup == 0) {
+               trap_init();
+               init_IRQ();
+               kgdb_early_setup = 1;
+       }
+
+       /* Set our traps. */
+       /* This needs to be done more finely grained again, paired in
+        * a before/after in kgdb_handle_exception(...) -- Tom */
+       set_debug_traps();
+       notifier_chain_register(&mips_die_chain, &kgdb_notifier);
+
+       return 0;
+}
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/kernel/kgdb_handler.S linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/kgdb_handler.S
--- linux-2.6.18-53.1.14/arch/mips/kernel/kgdb_handler.S        1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/kgdb_handler.S   2008-06-10 15:38:24.000000000 +0400
@@ -0,0 +1,57 @@
+/*
+ * arch/mips/kernel/kgdb_handler.S
+ *
+ * Copyright (C) 2004-2005 MontaVista Software Inc.
+ * Author: Manish Lachwani, mlachwani@mvista.com or manish@koffee-break.com
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/*
+ * Trap Handler for the new KGDB framework. The main KGDB handler is
+ * handle_exception that will be called from here
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/sys.h>
+
+#include <asm/asm.h>
+#include <asm/errno.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+       .align  5
+       NESTED(trap_low, PT_SIZE, sp)
+               .set    noat
+               .set    noreorder
+
+               /*
+                * Check for privileged instructions in user mode. For
+                * this, check the cu0 bit in the CPU status register.
+                */
+               mfc0    k0, CP0_STATUS
+               sll     k0, 3
+               bltz    k0, 1f
+               move    k1, sp
+
+               /*
+                * GDB userland from within KGDB. If a user mode address
+                * then jump to the saved exception handler
+                */
+               mfc0    k1, CP0_CAUSE
+               andi    k1, k1, 0x7c
+               PTR_L   k0, saved_vectors(k1)
+               jr      k0
+               nop
+1:
+               SAVE_ALL
+               .set    at
+               .set    reorder
+               move    a0, sp
+               jal     handle_exception
+               j       ret_from_exception
+       END(trap_low)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/kernel/traps.c linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/traps.c
--- linux-2.6.18-53.1.14/arch/mips/kernel/traps.c       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/kernel/traps.c  2008-06-10 15:38:24.000000000 +0400
@@ -10,6 +10,8 @@
  * Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
  * Copyright (C) 2000, 01 MIPS Technologies, Inc.
  * Copyright (C) 2002, 2003, 2004, 2005  Maciej W. Rozycki
+ *
+ * KGDB specific changes - Manish Lachwani (mlachwani@mvista.com)
  */
 #include <linux/init.h>
 #include <linux/mm.h>
@@ -20,6 +22,7 @@
 #include <linux/spinlock.h>
 #include <linux/kallsyms.h>
 #include <linux/bootmem.h>
+#include <linux/kgdb.h>
 
 #include <asm/bootinfo.h>
 #include <asm/branch.h>
@@ -40,6 +43,7 @@
 #include <asm/mmu_context.h>
 #include <asm/watch.h>
 #include <asm/types.h>
+#include <asm/kdebug.h>
 
 extern asmlinkage void handle_int(void);
 extern asmlinkage void handle_tlbm(void);
@@ -78,6 +82,21 @@ void (*board_bind_eic_interrupt)(int irq
  */
 #define MODULE_RANGE (8*1024*1024)
 
+struct notifier_block *mips_die_chain;
+static spinlock_t die_notifier_lock = SPIN_LOCK_UNLOCKED;
+
+int register_die_notifier(struct notifier_block *nb)
+{
+       int err = 0;
+       unsigned long flags;
+
+       spin_lock_irqsave(&die_notifier_lock, flags);
+       err = notifier_chain_register(&mips_die_chain, nb);
+       spin_unlock_irqrestore(&die_notifier_lock, flags);
+
+       return err;
+}
+
 /*
  * This routine abuses get_user()/put_user() to reference pointers
  * with at least a bit of error checking ...
@@ -1387,6 +1406,11 @@ void __init trap_init(void)
        extern char except_vec4;
        unsigned long i;
 
+#if defined(CONFIG_KGDB)
+       if (kgdb_early_setup)
+               return; /* Already done */
+#endif
+
        if (cpu_has_veic || cpu_has_vint)
                ebase = (unsigned long) alloc_bootmem_low_pages (0x200 + VECTORSPACING*64);
        else
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/mips-boards/generic/Makefile linux-2.6.18-53.1.14.kgdb/arch/mips/mips-boards/generic/Makefile
--- linux-2.6.18-53.1.14/arch/mips/mips-boards/generic/Makefile 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/mips-boards/generic/Makefile    2008-06-10 15:38:24.000000000 +0400
@@ -21,6 +21,5 @@
 obj-y                          := reset.o display.o init.o memory.o printf.o \
                                   cmdline.o time.o
 obj-$(CONFIG_PCI)              += pci.o
-obj-$(CONFIG_KGDB)             += gdb_hook.o
 
 EXTRA_AFLAGS := $(CFLAGS)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/mips-boards/generic/init.c linux-2.6.18-53.1.14.kgdb/arch/mips/mips-boards/generic/init.c
--- linux-2.6.18-53.1.14/arch/mips/mips-boards/generic/init.c   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/mips-boards/generic/init.c      2008-06-10 15:38:24.000000000 +0400
@@ -37,15 +37,6 @@
 
 #include <asm/mips-boards/malta.h>
 
-#ifdef CONFIG_KGDB
-extern int rs_kgdb_hook(int, int);
-extern int rs_putDebugChar(char);
-extern char rs_getDebugChar(void);
-extern int saa9730_kgdb_hook(int);
-extern int saa9730_putDebugChar(char);
-extern char saa9730_getDebugChar(void);
-#endif
-
 int prom_argc;
 int *_prom_argv, *_prom_envp;
 
@@ -172,58 +163,6 @@ static void __init console_config(void)
 }
 #endif
 
-#ifdef CONFIG_KGDB
-void __init kgdb_config (void)
-{
-       extern int (*generic_putDebugChar)(char);
-       extern char (*generic_getDebugChar)(void);
-       char *argptr;
-       int line, speed;
-
-       argptr = prom_getcmdline();
-       if ((argptr = strstr(argptr, "kgdb=ttyS")) != NULL) {
-               argptr += strlen("kgdb=ttyS");
-               if (*argptr != '0' && *argptr != '1')
-                       printk("KGDB: Unknown serial line /dev/ttyS%c, "
-                              "falling back to /dev/ttyS1\n", *argptr);
-               line = *argptr == '0' ? 0 : 1;
-               printk("KGDB: Using serial line /dev/ttyS%d for session\n", line);
-
-               speed = 0;
-               if (*++argptr == ',')
-               {
-                       int c;
-                       while ((c = *++argptr) && ('0' <= c && c <= '9'))
-                               speed = speed * 10 + c - '0';
-               }
-#ifdef CONFIG_MIPS_ATLAS
-               if (line == 1) {
-                       speed = saa9730_kgdb_hook(speed);
-                       generic_putDebugChar = saa9730_putDebugChar;
-                       generic_getDebugChar = saa9730_getDebugChar;
-               }
-               else
-#endif
-               {
-                       speed = rs_kgdb_hook(line, speed);
-                       generic_putDebugChar = rs_putDebugChar;
-                       generic_getDebugChar = rs_getDebugChar;
-               }
-
-               prom_printf("KGDB: Using serial line /dev/ttyS%d at %d for session, "
-                           "please connect your debugger\n", line ? 1 : 0, speed);
-
-               {
-                       char *s;
-                       for (s = "Please connect GDB to this port\r\n"; *s; )
-                               generic_putDebugChar (*s++);
-               }
-
-               /* Breakpoint is invoked after interrupts are initialised */
-       }
-}
-#endif
-
 void __init mips_nmi_setup (void)
 {
        void *base;
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/mips-boards/malta/malta_setup.c linux-2.6.18-53.1.14.kgdb/arch/mips/mips-boards/malta/malta_setup.c
--- linux-2.6.18-53.1.14/arch/mips/mips-boards/malta/malta_setup.c      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/mips-boards/malta/malta_setup.c 2008-06-10 15:38:24.000000000 +0400
@@ -46,10 +46,6 @@ extern void mips_reboot_setup(void);
 extern void mips_time_init(void);
 extern unsigned long mips_rtc_get_time(void);
 
-#ifdef CONFIG_KGDB
-extern void kgdb_config(void);
-#endif
-
 struct resource standard_io_resources[] = {
        { .name = "dma1", .start = 0x00, .end = 0x1f, .flags = IORESOURCE_BUSY },
        { .name = "timer", .start = 0x40, .end = 0x5f, .flags = IORESOURCE_BUSY },
@@ -124,10 +120,6 @@ void __init plat_mem_setup(void)
         */
        enable_dma(4);
 
-#ifdef CONFIG_KGDB
-       kgdb_config ();
-#endif
-
        if ((mips_revision_corid == MIPS_REVISION_CORID_BONITO64) ||
            (mips_revision_corid == MIPS_REVISION_CORID_CORE_20K) ||
            (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL_BON)) {
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/mm/extable.c linux-2.6.18-53.1.14.kgdb/arch/mips/mm/extable.c
--- linux-2.6.18-53.1.14/arch/mips/mm/extable.c 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/mm/extable.c    2008-06-10 15:38:24.000000000 +0400
@@ -3,6 +3,7 @@
  */
 #include <linux/module.h>
 #include <linux/spinlock.h>
+#include <linux/kgdb.h>
 #include <asm/branch.h>
 #include <asm/uaccess.h>
 
@@ -16,6 +17,12 @@ int fixup_exception(struct pt_regs *regs
 
                return 1;
        }
+#ifdef CONFIG_KGDB
+       if (atomic_read(&debugger_active) && kgdb_may_fault)
+               /* Restore our previous state. */
+               kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+               /* Not reached. */
+#endif
 
        return 0;
 }
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/sibyte/cfe/setup.c linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/cfe/setup.c
--- linux-2.6.18-53.1.14/arch/mips/sibyte/cfe/setup.c   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/cfe/setup.c      2008-06-10 15:38:24.000000000 +0400
@@ -58,10 +58,6 @@ int cfe_cons_handle;
 extern unsigned long initrd_start, initrd_end;
 #endif
 
-#ifdef CONFIG_KGDB
-extern int kgdb_port;
-#endif
-
 static void ATTRIB_NORET cfe_linux_exit(void *arg)
 {
        int warm = *(int *)arg;
@@ -242,9 +238,6 @@ void __init prom_init(void)
        int argc = fw_arg0;
        char **envp = (char **) fw_arg2;
        int *prom_vec = (int *) fw_arg3;
-#ifdef CONFIG_KGDB
-       char *arg;
-#endif
 
        _machine_restart   = cfe_linux_restart;
        _machine_halt      = cfe_linux_halt;
@@ -308,13 +301,6 @@ void __init prom_init(void)
                }
        }
 
-#ifdef CONFIG_KGDB
-       if ((arg = strstr(arcs_cmdline,"kgdb=duart")) != NULL)
-               kgdb_port = (arg[10] == '0') ? 0 : 1;
-       else
-               kgdb_port = 1;
-#endif
-
 #ifdef CONFIG_BLK_DEV_INITRD
        {
                char *ptr;
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/sibyte/sb1250/Makefile linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/sb1250/Makefile
--- linux-2.6.18-53.1.14/arch/mips/sibyte/sb1250/Makefile       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/sb1250/Makefile  2008-06-10 15:38:24.000000000 +0400
@@ -4,5 +4,6 @@ obj-$(CONFIG_SMP)                       += smp.o
 obj-$(CONFIG_SIBYTE_TBPROF)            += bcm1250_tbprof.o
 obj-$(CONFIG_SIBYTE_STANDALONE)                += prom.o
 obj-$(CONFIG_SIBYTE_BUS_WATCHER)       += bus_watcher.o
+obj-$(CONFIG_KGDB_SIBYTE)              += kgdb_sibyte.o
 
 EXTRA_AFLAGS := $(CFLAGS)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/sibyte/sb1250/irq.c linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/sb1250/irq.c
--- linux-2.6.18-53.1.14/arch/mips/sibyte/sb1250/irq.c  2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/sb1250/irq.c     2008-06-10 15:38:24.000000000 +0400
@@ -30,6 +30,7 @@
 #include <asm/system.h>
 #include <asm/ptrace.h>
 #include <asm/io.h>
+#include <asm/kgdb.h>
 
 #include <asm/sibyte/sb1250_regs.h>
 #include <asm/sibyte/sb1250_int.h>
@@ -59,16 +60,6 @@ static void sb1250_set_affinity(unsigned
 extern unsigned long ldt_eoi_space;
 #endif
 
-#ifdef CONFIG_KGDB
-static int kgdb_irq;
-
-/* Default to UART1 */
-int kgdb_port = 1;
-#ifdef CONFIG_SIBYTE_SB1250_DUART
-extern char sb1250_duart_present[];
-#endif
-#endif
-
 static struct irq_chip sb1250_irq_type = {
        .typename = "SB1250-IMR",
        .startup = startup_sb1250_irq,
@@ -324,6 +315,11 @@ void __init arch_init_irq(void)
        unsigned int imask = STATUSF_IP4 | STATUSF_IP3 | STATUSF_IP2 |
                STATUSF_IP1 | STATUSF_IP0;
 
+#ifdef CONFIG_KGDB
+       if (kgdb_early_setup)
+               return;
+#endif
+
        /* Default everything to IP2 */
        for (i = 0; i < SB1250_NR_IRQS; i++) {  /* was I0 */
                __raw_writeq(IMR_IP2_VAL,
@@ -375,50 +371,6 @@ void __init arch_init_irq(void)
        /* Enable necessary IPs, disable the rest */
        change_c0_status(ST0_IM, imask);
 
-#ifdef CONFIG_KGDB
-       if (kgdb_flag) {
-               kgdb_irq = K_INT_UART_0 + kgdb_port;
-
-#ifdef CONFIG_SIBYTE_SB1250_DUART
-               sb1250_duart_present[kgdb_port] = 0;
-#endif
-               /* Setup uart 1 settings, mapper */
-               __raw_writeq(M_DUART_IMR_BRK,
-                            IOADDR(A_DUART_IMRREG(kgdb_port)));
-
-               sb1250_steal_irq(kgdb_irq);
-               __raw_writeq(IMR_IP6_VAL,
-                            IOADDR(A_IMR_REGISTER(0,
-                                                  R_IMR_INTERRUPT_MAP_BASE) +
-                                   (kgdb_irq << 3)));
-               sb1250_unmask_irq(0, kgdb_irq);
-       }
-#endif
-}
-
-#ifdef CONFIG_KGDB
-
-#include <linux/delay.h>
-
-#define duart_out(reg, val)     csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
-#define duart_in(reg)           csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
-
-static void sb1250_kgdb_interrupt(struct pt_regs *regs)
-{
-       /*
-        * Clear break-change status (allow some time for the remote
-        * host to stop the break, since we would see another
-        * interrupt on the end-of-break too)
-        */
-       kstat_this_cpu.irqs[kgdb_irq]++;
-       mdelay(500);
-       duart_out(R_DUART_CMD, V_DUART_MISC_CMD_RESET_BREAK_INT |
-                               M_DUART_RX_EN | M_DUART_TX_EN);
-       set_async_breakpoint(&regs->cp0_epc);
-}
-
-#endif         /* CONFIG_KGDB */
-
 static inline int dclz(unsigned long long x)
 {
        int lz;
@@ -473,7 +425,7 @@ asmlinkage void plat_irq_dispatch(struct
                sb1250_mailbox_interrupt(regs);
 #endif
 
-#ifdef CONFIG_KGDB
+#ifdef CONFIG_KGDB_SIBYTE
        else if (pending & CAUSEF_IP6)                  /* KGDB (uart 1) */
                sb1250_kgdb_interrupt(regs);
 #endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/sibyte/sb1250/kgdb_sibyte.c linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/sb1250/kgdb_sibyte.c
--- linux-2.6.18-53.1.14/arch/mips/sibyte/sb1250/kgdb_sibyte.c  1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/sb1250/kgdb_sibyte.c     2008-06-10 15:38:24.000000000 +0400
@@ -0,0 +1,164 @@
+/*
+ * arch/mips/sibyte/sb1250/kgdb_sibyte.c
+ *
+ * Author: Manish Lachwani, mlachwani@mvista.com or manish@koffee-break.com
+ *
+ * 2004 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+/*
+ * Support for KGDB on the Broadcom Sibyte. The SWARM board
+ * for example does not have a 8250/16550 compatible serial
+ * port. Hence, we need to have a driver for the serial
+ * ports to handle KGDB.  This board needs nothing in addition
+ * to what is normally provided by the gdb portion of the stub.
+ */
+
+#include <linux/delay.h>
+#include <linux/kernel_stat.h>
+#include <linux/init.h>
+#include <linux/kgdb.h>
+
+#include <asm/io.h>
+#include <asm/sibyte/sb1250.h>
+#include <asm/sibyte/sb1250_regs.h>
+#include <asm/sibyte/sb1250_uart.h>
+#include <asm/sibyte/sb1250_int.h>
+#include <asm/addrspace.h>
+
+int kgdb_port = 1;
+static int kgdb_irq;
+
+extern char sb1250_duart_present[];
+extern int sb1250_steal_irq(int irq);
+
+/* Forward declarations. */
+static void kgdbsibyte_init_duart(void);
+static int kgdb_init_io(void);
+
+#define IMR_IP6_VAL    K_INT_MAP_I4
+#define        duart_out(reg, val)     csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
+#define duart_in(reg)          csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
+
+static void kgdb_swarm_write_char(int c)
+{
+       while ((duart_in(R_DUART_STATUS) & M_DUART_TX_RDY) == 0) ;
+       duart_out(R_DUART_TX_HOLD, c);
+}
+
+static int kgdb_swarm_read_char(void)
+{
+       int ret_char;
+       unsigned int status;
+
+       status = duart_in(R_DUART_STATUS);
+       while ((status & M_DUART_RX_RDY) == 0) {
+               status = duart_in(R_DUART_STATUS);
+       }
+
+       /*
+        * Check for framing error
+        */
+       if (status & M_DUART_FRM_ERR) {
+               kgdbsibyte_init_duart();
+               kgdb_swarm_write_char('-');
+               return '-';
+       }
+
+       ret_char = duart_in(R_DUART_RX_HOLD);
+
+       return ret_char;
+}
+
+void sb1250_kgdb_interrupt(struct pt_regs *regs)
+{
+       int kgdb_irq = K_INT_UART_0 + kgdb_port;
+       /*
+        * Clear break-change status (allow some time for the remote
+        * host to stop the break, since we would see another
+        * interrupt on the end-of-break too)
+        */
+       kstat_this_cpu.irqs[kgdb_irq]++;
+       mdelay(500);
+       duart_out(R_DUART_CMD, V_DUART_MISC_CMD_RESET_BREAK_INT |
+                 M_DUART_RX_EN | M_DUART_TX_EN);
+       if (kgdb_io_ops.init != kgdb_init_io) {
+               /* Throw away the data if another I/O routine is
+                * active.
+                */
+               unsigned int status;
+
+               status = duart_in(R_DUART_STATUS);
+               while ((status & M_DUART_RX_RDY) == 0) {
+                       status = duart_in(R_DUART_STATUS);
+               }
+               /*
+                * Check for framing error
+                */
+               if (status & M_DUART_FRM_ERR) {
+                       kgdbsibyte_init_duart();
+               }
+               duart_in(R_DUART_RX_HOLD);
+       } else
+               breakpoint();
+
+}
+
+/*
+ * We use port #1 and we set it for 115200 BAUD, 8n1.
+ */
+static void kgdbsibyte_init_duart(void)
+{
+       /* Set 8n1. */
+       duart_out(R_DUART_MODE_REG_1,
+                 V_DUART_BITS_PER_CHAR_8 | V_DUART_PARITY_MODE_NONE);
+       duart_out(R_DUART_MODE_REG_2, M_DUART_STOP_BIT_LEN_1);
+       /* Set baud rate of 115200. */
+       duart_out(R_DUART_CLK_SEL, V_DUART_BAUD_RATE(115200));
+       /* Enable rx and tx */
+       duart_out(R_DUART_CMD, M_DUART_RX_EN | M_DUART_TX_EN);
+}
+
+static int kgdb_init_io(void)
+{
+#ifdef CONFIG_SIBYTE_SB1250_DUART
+       sb1250_duart_present[kgdb_port] = 0;
+#endif
+
+       kgdbsibyte_init_duart();
+
+       return 0;
+}
+
+/*
+ * Hookup our IRQ line.  We will already have been initialized a
+ * this point.
+ */
+static void __init kgdbsibyte_hookup_irq(void)
+{
+       /* Steal the IRQ. */
+       kgdb_irq = K_INT_UART_0 + kgdb_port;
+
+       /* Setup uart 1 settings, mapper */
+       __raw_writeq(M_DUART_IMR_BRK, IOADDR(A_DUART_IMRREG(kgdb_port)));
+
+       sb1250_steal_irq(kgdb_irq);
+
+       __raw_writeq(IMR_IP6_VAL,
+                    IOADDR(A_IMR_REGISTER(0, R_IMR_INTERRUPT_MAP_BASE) +
+                           (kgdb_irq << 3)));
+
+       sb1250_unmask_irq(0, kgdb_irq);
+}
+
+struct kgdb_io kgdb_io_ops = {
+       .read_char = kgdb_swarm_read_char,
+       .write_char = kgdb_swarm_write_char,
+       .init = kgdb_init_io,
+       .late_init = kgdbsibyte_hookup_irq,
+       .pre_exception = NULL,
+       .post_exception = NULL
+};
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/sibyte/swarm/Makefile linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/swarm/Makefile
--- linux-2.6.18-53.1.14/arch/mips/sibyte/swarm/Makefile        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/swarm/Makefile   2008-06-10 15:38:24.000000000 +0400
@@ -1,3 +1 @@
 lib-y                          = setup.o rtc_xicor1241.o rtc_m41t81.o
-
-lib-$(CONFIG_KGDB)             += dbg_io.o
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/sibyte/swarm/dbg_io.c linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/swarm/dbg_io.c
--- linux-2.6.18-53.1.14/arch/mips/sibyte/swarm/dbg_io.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/sibyte/swarm/dbg_io.c   1970-01-01 03:00:00.000000000 +0300
@@ -1,76 +0,0 @@
-/*
- * kgdb debug routines for SiByte boards.
- *
- * Copyright (C) 2001 MontaVista Software Inc.
- * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
- *
- */
-
-/* -------------------- BEGINNING OF CONFIG --------------------- */
-
-#include <linux/delay.h>
-#include <asm/io.h>
-#include <asm/sibyte/sb1250.h>
-#include <asm/sibyte/sb1250_regs.h>
-#include <asm/sibyte/sb1250_uart.h>
-#include <asm/sibyte/sb1250_int.h>
-#include <asm/addrspace.h>
-
-/*
- * We use the second serial port for kgdb traffic.
- *     115200, 8, N, 1.
- */
-
-#define        BAUD_RATE               115200
-#define        CLK_DIVISOR             V_DUART_BAUD_RATE(BAUD_RATE)
-#define        DATA_BITS               V_DUART_BITS_PER_CHAR_8         /* or 7    */
-#define        PARITY                  V_DUART_PARITY_MODE_NONE        /* or even */
-#define        STOP_BITS               M_DUART_STOP_BIT_LEN_1          /* or 2    */
-
-static int duart_initialized = 0;      /* 0: need to be init'ed by kgdb */
-
-/* -------------------- END OF CONFIG --------------------- */
-extern int kgdb_port;
-
-#define        duart_out(reg, val)     csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
-#define duart_in(reg)          csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
-
-void putDebugChar(unsigned char c);
-unsigned char getDebugChar(void);
-static void
-duart_init(int clk_divisor, int data, int parity, int stop)
-{
-       duart_out(R_DUART_MODE_REG_1, data | parity);
-       duart_out(R_DUART_MODE_REG_2, stop);
-       duart_out(R_DUART_CLK_SEL, clk_divisor);
-
-       duart_out(R_DUART_CMD, M_DUART_RX_EN | M_DUART_TX_EN);  /* enable rx and tx */
-}
-
-void
-putDebugChar(unsigned char c)
-{
-       if (!duart_initialized) {
-               duart_initialized = 1;
-               duart_init(CLK_DIVISOR, DATA_BITS, PARITY, STOP_BITS);
-       }
-       while ((duart_in(R_DUART_STATUS) & M_DUART_TX_RDY) == 0);
-       duart_out(R_DUART_TX_HOLD, c);
-}
-
-unsigned char
-getDebugChar(void)
-{
-       if (!duart_initialized) {
-               duart_initialized = 1;
-               duart_init(CLK_DIVISOR, DATA_BITS, PARITY, STOP_BITS);
-       }
-       while ((duart_in(R_DUART_STATUS) & M_DUART_RX_RDY) == 0) ;
-       return duart_in(R_DUART_RX_HOLD);
-}
-
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/mips/tx4938/common/Makefile linux-2.6.18-53.1.14.kgdb/arch/mips/tx4938/common/Makefile
--- linux-2.6.18-53.1.14/arch/mips/tx4938/common/Makefile       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/mips/tx4938/common/Makefile  2008-06-10 15:38:24.000000000 +0400
@@ -7,5 +7,5 @@
 #
 
 obj-y  += prom.o setup.o irq.o rtc_rx5c348.o
-obj-$(CONFIG_KGDB) += dbgio.o
+obj-$(CONFIG_KGDB_8250) += dbgio.o
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/powerpc/Kconfig.debug linux-2.6.18-53.1.14.kgdb/arch/powerpc/Kconfig.debug
--- linux-2.6.18-53.1.14/arch/powerpc/Kconfig.debug     2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/powerpc/Kconfig.debug        2008-06-10 15:38:14.000000000 +0400
@@ -18,52 +18,9 @@ config DEBUG_STACK_USAGE
 
          This option will slow down process creation somewhat.
 
-config DEBUGGER
-       bool "Enable debugger hooks"
-       depends on DEBUG_KERNEL
-       help
-         Include in-kernel hooks for kernel debuggers. Unless you are
-         intending to debug the kernel, say N here.
-
-config KGDB
-       bool "Include kgdb kernel debugger"
-       depends on DEBUGGER && (BROKEN || PPC_GEN550 || 4xx)
-       select DEBUG_INFO
-       help
-         Include in-kernel hooks for kgdb, the Linux kernel source level
-         debugger.  See <http://kgdb.sourceforge.net/> for more information.
-         Unless you are intending to debug the kernel, say N here.
-
-choice
-       prompt "Serial Port"
-       depends on KGDB
-       default KGDB_TTYS1
-
-config KGDB_TTYS0
-       bool "ttyS0"
-
-config KGDB_TTYS1
-       bool "ttyS1"
-
-config KGDB_TTYS2
-       bool "ttyS2"
-
-config KGDB_TTYS3
-       bool "ttyS3"
-
-endchoice
-
-config KGDB_CONSOLE
-       bool "Enable serial console thru kgdb port"
-       depends on KGDB && 8xx || CPM2
-       help
-         If you enable this, all serial console messages will be sent
-         over the gdb stub.
-         If unsure, say N.
-
 config XMON
        bool "Include xmon kernel debugger"
-       depends on DEBUGGER && !PPC_ISERIES
+       depends on DEBUG_KERNEL && !PPC_ISERIES
        help
          Include in-kernel hooks for the xmon kernel monitor/debugger.
          Unless you are intending to debug the kernel, say N here.
@@ -82,6 +39,11 @@ config XMON_DEFAULT
          xmon is normally disabled unless booted with 'xmon=on'.
          Use 'xmon=off' to disable xmon init during runtime.
 
+config DEBUGGER
+       bool
+       depends on KGDB || XMON
+       default y
+
 config IRQSTACKS
        bool "Use separate kernel stacks when processing interrupts"
        depends on PPC64
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/powerpc/kernel/Makefile linux-2.6.18-53.1.14.kgdb/arch/powerpc/kernel/Makefile
--- linux-2.6.18-53.1.14/arch/powerpc/kernel/Makefile   2008-03-06 05:54:47.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/powerpc/kernel/Makefile      2008-06-10 15:38:14.000000000 +0400
@@ -59,6 +59,7 @@ obj-$(CONFIG_PPC64)           += misc_64.o dma_64
 obj-$(CONFIG_PPC_MULTIPLATFORM)        += prom_init.o
 obj-$(CONFIG_MODULES)          += ppc_ksyms.o
 obj-$(CONFIG_BOOTX_TEXT)       += btext.o
+obj-$(CONFIG_KGDB)             += kgdb.o
 obj-$(CONFIG_SMP)              += smp.o
 obj-$(CONFIG_KPROBES)          += kprobes.o
 obj-$(CONFIG_PPC_UDBG_16550)   += legacy_serial.o udbg_16550.o
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/powerpc/kernel/kgdb.c linux-2.6.18-53.1.14.kgdb/arch/powerpc/kernel/kgdb.c
--- linux-2.6.18-53.1.14/arch/powerpc/kernel/kgdb.c     1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/powerpc/kernel/kgdb.c        2008-06-10 15:38:14.000000000 +0400
@@ -0,0 +1,568 @@
+/*
+ * arch/powerpc/kernel/kgdb.c
+ *
+ * PowerPC backend to the KGDB stub.
+ *
+ * Maintainer: Tom Rini <trini@kernel.crashing.org>
+ *
+ * Copied from arch/ppc/kernel/kgdb.c, updated for ppc64
+ *
+ * Copyright (C) 1996 Paul Mackerras (setjmp/longjmp)
+ * 1998 (c) Michael AK Tesch (tesch@cs.wisc.edu)
+ * Copyright (C) 2003 Timesys Corporation.
+ * Copyright (C) 2004-2006 MontaVista Software, Inc.
+ * PPC64 Mods (C) 2005 Frank Rowand (frowand@mvista.com)
+ * PPC32 support restored by Vitaly Wool <vwool@ru.mvista.com> and
+ * Sergei Shtylyov <sshtylyov@ru.mvista.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program as licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/kgdb.h>
+#include <linux/smp.h>
+#include <linux/signal.h>
+#include <linux/ptrace.h>
+#include <asm/current.h>
+#include <asm/ptrace.h>
+#include <asm/processor.h>
+#include <asm/machdep.h>
+
+/*
+ * This table contains the mapping between PowerPC hardware trap types, and
+ * signals, which are primarily what GDB understands.  GDB and the kernel
+ * don't always agree on values, so we use constants taken from gdb-6.2.
+ */
+static struct hard_trap_info
+{
+       unsigned int tt;                /* Trap type code for powerpc */
+       unsigned char signo;            /* Signal that we map this trap into */
+} hard_trap_info[] = {
+       { 0x0100, 0x02 /* SIGINT */  },         /* system reset */
+       { 0x0200, 0x0b /* SIGSEGV */ },         /* machine check */
+       { 0x0300, 0x0b /* SIGSEGV */ },         /* data access */
+       { 0x0400, 0x0b /* SIGSEGV */ },  /* instruction access */
+       { 0x0500, 0x02 /* SIGINT */  },  /* external interrupt */
+       { 0x0600, 0x0a /* SIGBUS */  },         /* alignment */
+       { 0x0700, 0x05 /* SIGTRAP */ },  /* program check */
+       { 0x0800, 0x08 /* SIGFPE */  },  /* fp unavailable */
+       { 0x0900, 0x0e /* SIGALRM */ },  /* decrementer */
+       { 0x0c00, 0x14 /* SIGCHLD */ },  /* system call */
+#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
+       { 0x2002, 0x05 /* SIGTRAP */ },  /* debug */
+#if defined(CONFIG_FSL_BOOKE)
+       { 0x2010, 0x08 /* SIGFPE */  },  /* spe unavailable */
+       { 0x2020, 0x08 /* SIGFPE */  },  /* spe unavailable */
+       { 0x2030, 0x08 /* SIGFPE */  },  /* spe fp data */
+       { 0x2040, 0x08 /* SIGFPE */  },  /* spe fp data */
+       { 0x2050, 0x08 /* SIGFPE */  },  /* spe fp round */
+       { 0x2060, 0x0e /* SIGILL */  },  /* performace monitor */
+       { 0x2900, 0x08 /* SIGFPE */  },  /* apu unavailable */
+       { 0x3100, 0x0e /* SIGALRM */ },  /* fixed interval timer */
+       { 0x3200, 0x02 /* SIGINT */  },  /* watchdog */
+#else
+       { 0x1000, 0x0e /* SIGALRM */ },  /* programmable interval timer */
+       { 0x1010, 0x0e /* SIGALRM */ },  /* fixed interval timer */
+       { 0x1020, 0x02 /* SIGINT */  },  /* watchdog */
+       { 0x2010, 0x08 /* SIGFPE */  },  /* fp unavailable */
+       { 0x2020, 0x08 /* SIGFPE */  },  /* ap unavailable */
+#endif
+#else
+       { 0x0d00, 0x05 /* SIGTRAP */ },  /* single-step */
+#if defined(CONFIG_8xx)
+       { 0x1000, 0x04 /* SIGILL */  },  /* software emulation */
+#else
+       { 0x0f00, 0x04 /* SIGILL */  },         /* performance monitor */
+       { 0x0f20, 0x08 /* SIGFPE */  },         /* altivec unavailable */
+       { 0x1300, 0x05 /* SIGTRAP */ },         /* instruction address break */
+#if defined(CONFIG_PPC64)
+       { 0x1200, 0x05 /* SIGILL */  },         /* system error */
+       { 0x1500, 0x04 /* SIGILL */  },         /* soft patch */
+       { 0x1600, 0x04 /* SIGILL */  },         /* maintenance */
+       { 0x1700, 0x08 /* SIGFPE */  },  /* altivec assist */
+       { 0x1800, 0x04 /* SIGILL */  },         /* thermal */
+#else
+       { 0x1400, 0x02 /* SIGINT */  },  /* SMI */
+       { 0x1600, 0x08 /* SIGFPE */  },  /* altivec assist */
+       { 0x1700, 0x04 /* SIGILL */  },  /* TAU */
+       { 0x2000, 0x05 /* SIGTRAP */ },  /* run mode */
+#endif
+#endif
+#endif
+       { 0x0000, 0x00 }                        /* Must be last */
+};
+
+extern atomic_t cpu_doing_single_step;
+
+static int computeSignal(unsigned int tt)
+{
+       struct hard_trap_info *ht;
+
+       for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+               if (ht->tt == tt)
+                       return ht->signo;
+
+       return SIGHUP;          /* default for things we don't know about */
+}
+
+static int kgdb_call_nmi_hook(struct pt_regs *regs)
+{
+       kgdb_nmihook(smp_processor_id(), regs);
+       return 0;
+}
+
+#ifdef CONFIG_SMP
+void kgdb_roundup_cpus(unsigned long flags)
+{
+       smp_send_debugger_break(MSG_ALL_BUT_SELF);
+}
+#endif
+
+/* KGDB functions to use existing PowerPC64 hooks. */
+static int kgdb_debugger(struct pt_regs *regs)
+{
+       return kgdb_handle_exception(0, computeSignal(TRAP(regs)), 0, regs);
+}
+
+static int kgdb_breakpoint(struct pt_regs *regs)
+{
+       if (user_mode(regs))
+               return 0;
+
+       kgdb_handle_exception(0, SIGTRAP, 0, regs);
+
+       if (*(u32 *) (regs->nip) == *(u32 *) (&arch_kgdb_ops.gdb_bpt_instr))
+               regs->nip += 4;
+
+       return 1;
+}
+
+static int kgdb_singlestep(struct pt_regs *regs)
+{
+       struct thread_info *thread_info, *exception_thread_info;
+       if (user_mode(regs))
+               return 0;
+       /*
+       * On Book E and perhaps other processsors, singlestep is handled on
+       * the critical exception stack.  This causes current_thread_info()
+       * to fail, since it it locates the thread_info by masking off
+       * the low bits of the current stack pointer.  We work around
+       * this issue by copying the thread_info from the kernel stack
+       * before calling kgdb_handle_exception, and copying it back
+       * afterwards.  On most processors the copy is avoided since
+       * exception_thread_info == thread_info.
+       */
+       thread_info = (struct thread_info *)(regs->gpr[1] & ~(THREAD_SIZE-1));
+       exception_thread_info = current_thread_info();
+
+       if (thread_info != exception_thread_info)
+               memcpy(exception_thread_info, thread_info, sizeof *thread_info);
+
+       kgdb_handle_exception(0, SIGTRAP, 0, regs);
+
+       if (thread_info != exception_thread_info)
+               memcpy(thread_info, exception_thread_info, sizeof *thread_info);
+
+       return 1;
+}
+
+int kgdb_iabr_match(struct pt_regs *regs)
+{
+       if (user_mode(regs))
+               return 0;
+
+       kgdb_handle_exception(0, computeSignal(TRAP(regs)), 0, regs);
+       return 1;
+}
+
+int kgdb_dabr_match(struct pt_regs *regs)
+{
+       if (user_mode(regs))
+               return 0;
+
+       kgdb_handle_exception(0, computeSignal(TRAP(regs)), 0, regs);
+       return 1;
+}
+
+#define PACK64(ptr,src) do { *(ptr++) = (src); } while(0)
+
+#define PACK32(ptr,src) do {          \
+       u32 *ptr32;                   \
+       ptr32 = (u32 *)ptr;           \
+       *(ptr32++) = (src);           \
+       ptr = (unsigned long *)ptr32; \
+       } while(0)
+
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+       unsigned long *ptr = gdb_regs;
+       int reg;
+
+       memset(gdb_regs, 0, NUMREGBYTES);
+
+       for (reg = 0; reg < 32; reg++)
+               PACK64(ptr, regs->gpr[reg]);
+
+#ifdef CONFIG_FSL_BOOKE
+#ifdef CONFIG_SPE
+       for (reg = 0; reg < 32; reg++)
+               PACK64(ptr, current->thread.evr[reg]);
+#else
+       ptr += 32;
+#endif
+#else
+       /* fp registers not used by kernel, leave zero */
+       ptr += 32 * 8 / sizeof(long);
+#endif
+
+       PACK64(ptr, regs->nip);
+       PACK64(ptr, regs->msr);
+       PACK32(ptr, regs->ccr);
+       PACK64(ptr, regs->link);
+       PACK64(ptr, regs->ctr);
+       PACK32(ptr, regs->xer);
+
+#if 0
+       Following are in struct thread_struct, not struct pt_regs,
+       ignoring for now since kernel does not use them.  Would it
+       make sense to get them from the thread that kgdb is set to?
+
+       If this code is enabled, update the definition of NUMREGBYTES to
+       include the vector registers and vector state registers.
+
+       PACK32(ptr, current->thread->fpscr);
+
+       /* vr registers not used by kernel, leave zero */
+       ptr += 32 * 16 / sizeof(long);
+
+#ifdef CONFIG_ALTIVEC
+       PACK32(ptr, current->thread->vscr);
+       PACK32(ptr, current->thread->vrsave);
+#else
+       ptr += 2 * 4 / sizeof(long);
+#endif
+#else
+#ifdef CONFIG_FSL_BOOKE
+#ifdef CONFIG_SPE
+       /* u64 acc */
+       PACK32(ptr, current->thread.acc >> 32);
+       PACK32(ptr, current->thread.acc & 0xffffffff);
+       PACK64(ptr, current->thread.spefscr);
+#else
+       ptr += 2 + 1;
+#endif
+#else
+       /* fpscr not used by kernel, leave zero */
+       PACK32(ptr, 0);
+#endif
+#endif
+
+       BUG_ON((unsigned long)ptr >
+              (unsigned long)(((void *)gdb_regs) + NUMREGBYTES));
+}
+
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+       struct pt_regs *regs = (struct pt_regs *)(p->thread.ksp +
+                                                 STACK_FRAME_OVERHEAD);
+       unsigned long *ptr = gdb_regs;
+       int reg;
+
+       memset(gdb_regs, 0, NUMREGBYTES);
+
+       /* Regs GPR0-2 */
+       for (reg = 0; reg < 3; reg++)
+               PACK64(ptr, regs->gpr[reg]);
+
+       /* Regs GPR3-13 are caller saved, not in regs->gpr[] */
+       ptr += 11;
+
+       /* Regs GPR14-31 */
+       for (reg = 14; reg < 32; reg++)
+               PACK64(ptr, regs->gpr[reg]);
+
+#ifdef CONFIG_FSL_BOOKE
+#ifdef CONFIG_SPE
+       for (reg = 0; reg < 32; reg++)
+               PACK64(ptr, p->thread.evr[reg]);
+#else
+       ptr += 32;
+#endif
+#else
+       /* fp registers not used by kernel, leave zero */
+       ptr += 32 * 8 / sizeof(long);
+#endif
+       PACK64(ptr, regs->nip);
+       PACK64(ptr, regs->msr);
+       PACK32(ptr, regs->ccr);
+       PACK64(ptr, regs->link);
+       PACK64(ptr, regs->ctr);
+       PACK32(ptr, regs->xer);
+
+#if 0
+       Following are in struct thread_struct, not struct pt_regs,
+       ignoring for now since kernel does not use them.  Would it
+       make sense to get them from the thread that kgdb is set to?
+
+       If this code is enabled, update the definition of NUMREGBYTES to
+       include the vector registers and vector state registers.
+
+       PACK32(ptr, p->thread->fpscr);
+
+       /* vr registers not used by kernel, leave zero */
+       ptr += 32 * 16 / sizeof(long);
+
+#ifdef CONFIG_ALTIVEC
+       PACK32(ptr, p->thread->vscr);
+       PACK32(ptr, p->thread->vrsave);
+#else
+       ptr += 2 * 4 / sizeof(long);
+#endif
+#else
+#ifdef CONFIG_FSL_BOOKE
+#ifdef CONFIG_SPE
+       /* u64 acc */
+       PACK32(ptr, p->thread.acc >> 32);
+       PACK32(ptr, p->thread.acc & 0xffffffff);
+       PACK64(ptr, p->thread.spefscr);
+#else
+       ptr += 2 + 1;
+#endif
+#else
+       /* fpscr not used by kernel, leave zero */
+       PACK32(ptr, 0);
+#endif
+#endif
+
+       BUG_ON((unsigned long)ptr >
+              (unsigned long)(((void *)gdb_regs) + NUMREGBYTES));
+}
+
+#define UNPACK64(dest,ptr) do { dest = *(ptr++); } while(0)
+
+#define UNPACK32(dest,ptr) do {       \
+       u32 *ptr32;                   \
+       ptr32 = (u32 *)ptr;           \
+       dest = *(ptr32++);            \
+       ptr = (unsigned long *)ptr32; \
+       } while(0)
+
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+       unsigned long *ptr = gdb_regs;
+       int reg;
+
+#ifdef CONFIG_SPE
+       union {
+               u32 v32[2];
+               u64 v64;
+       } acc;
+#endif
+       for (reg = 0; reg < 32; reg++)
+               UNPACK64(regs->gpr[reg], ptr);
+
+#ifdef CONFIG_FSL_BOOKE
+#ifdef CONFIG_SPE
+       for (reg = 0; reg < 32; reg++)
+               UNPACK64(current->thread.evr[reg], ptr);
+#else
+       ptr += 32;
+#endif
+#else
+       /* fp registers not used by kernel, leave zero */
+       ptr += 32 * 8 / sizeof(int);
+#endif
+       UNPACK64(regs->nip, ptr);
+       UNPACK64(regs->msr, ptr);
+       UNPACK32(regs->ccr, ptr);
+       UNPACK64(regs->link, ptr);
+       UNPACK64(regs->ctr, ptr);
+       UNPACK32(regs->xer, ptr);
+
+#if 0
+       Following are in struct thread_struct, not struct pt_regs,
+       ignoring for now since kernel does not use them.  Would it
+       make sense to get them from the thread that kgdb is set to?
+
+       If this code is enabled, update the definition of NUMREGBYTES to
+       include the vector registers and vector state registers.
+
+       /* fpscr, vscr, vrsave not used by kernel, leave unchanged */
+
+       UNPACK32(current->thread->fpscr, ptr);
+
+       /* vr registers not used by kernel, leave zero */
+       ptr += 32 * 16 / sizeof(long);
+
+       #ifdef CONFIG_ALTIVEC
+       UNPACK32(current->thread->vscr, ptr);
+       UNPACK32(current->thread->vrsave, ptr);
+#else
+       ptr += 2 * 4 / sizeof(long);
+#endif
+#else
+#ifdef CONFIG_FSL_BOOKE
+#ifdef CONFIG_SPE
+       /* u64 acc */
+       UNPACK32(acc.v32[0], ptr);
+       UNPACK32(acc.v32[1], ptr);
+       current->thread.acc = acc.v64;
+       UNPACK64(current->thread.spefscr, ptr);
+#else
+       ptr += 2 + 1;
+#endif
+#endif
+#endif
+
+       BUG_ON((unsigned long)ptr >
+              (unsigned long)(((void *)gdb_regs) + NUMREGBYTES));
+}
+
+/*
+ * This function does PowerPC specific procesing for interfacing to gdb.
+ */
+int kgdb_arch_handle_exception(int vector, int signo, int err_code,
+                              char *remcom_in_buffer, char *remcom_out_buffer,
+                              struct pt_regs *linux_regs)
+{
+       char *ptr = &remcom_in_buffer[1];
+       unsigned long addr;
+
+       switch (remcom_in_buffer[0]) {
+               /*
+                * sAA..AA   Step one instruction from AA..AA
+                * This will return an error to gdb ..
+                */
+       case 's':
+       case 'c':
+               /* handle the optional parameter */
+               if (kgdb_hex2long(&ptr, &addr))
+                       linux_regs->nip = addr;
+
+               atomic_set(&cpu_doing_single_step, -1);
+               /* set the trace bit if we're stepping */
+               if (remcom_in_buffer[0] == 's') {
+#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
+                       mtspr(SPRN_DBCR0,
+                               mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM);
+                       linux_regs->msr |= MSR_DE;
+#else
+                       linux_regs->msr |= MSR_SE;
+#endif
+                       debugger_step = 1;
+                       if (kgdb_contthread)
+                               atomic_set(&cpu_doing_single_step,
+                                          smp_processor_id());
+               }
+               return 0;
+       }
+
+       return -1;
+}
+
+int kgdb_fault_setjmp(unsigned long *curr_context)
+{
+#ifdef CONFIG_PPC32
+       __asm__ __volatile__("mflr 0; stw 0,0(%0);\n\
+                               stw 1,4(%0); stw 2,8(%0);\n\
+                               mfcr 0; stw 0,12(%0);\n\
+                               stmw 13,16(%0)\n" : : "r" (curr_context));
+#else
+       __asm__ __volatile__("mflr 0; std 0,0(%0)\n\
+                             std       1,8(%0)\n\
+                             std       2,16(%0)\n\
+                             mfcr 0; std 0,24(%0)\n\
+                             std       13,32(%0)\n\
+                             std       14,40(%0)\n\
+                             std       15,48(%0)\n\
+                             std       16,56(%0)\n\
+                             std       17,64(%0)\n\
+                             std       18,72(%0)\n\
+                             std       19,80(%0)\n\
+                             std       20,88(%0)\n\
+                             std       21,96(%0)\n\
+                             std       22,104(%0)\n\
+                             std       23,112(%0)\n\
+                             std       24,120(%0)\n\
+                             std       25,128(%0)\n\
+                             std       26,136(%0)\n\
+                             std       27,144(%0)\n\
+                             std       28,152(%0)\n\
+                             std       29,160(%0)\n\
+                             std       30,168(%0)\n\
+                             std       31,176(%0)\n" : : "r" (curr_context));
+#endif
+       return 0;
+}
+
+void kgdb_fault_longjmp(unsigned long *curr_context)
+{
+#ifdef CONFIG_PPC32
+       __asm__ __volatile__("lmw 13,16(%0);\n\
+                             lwz 0,12(%0); mtcrf 0x38,0;\n\
+                             lwz 0,0(%0); lwz 1,4(%0); lwz 2,8(%0);\n\
+                             mtlr 0; mr 3,1\n" : : "r" (curr_context));
+#else
+       __asm__ __volatile__("ld        13,32(%0)\n\
+                             ld        14,40(%0)\n\
+                             ld        15,48(%0)\n\
+                             ld        16,56(%0)\n\
+                             ld        17,64(%0)\n\
+                             ld        18,72(%0)\n\
+                             ld        19,80(%0)\n\
+                             ld        20,88(%0)\n\
+                             ld        21,96(%0)\n\
+                             ld        22,104(%0)\n\
+                             ld        23,112(%0)\n\
+                             ld        24,120(%0)\n\
+                             ld        25,128(%0)\n\
+                             ld        26,136(%0)\n\
+                             ld        27,144(%0)\n\
+                             ld        28,152(%0)\n\
+                             ld        29,160(%0)\n\
+                             ld        30,168(%0)\n\
+                             ld        31,176(%0)\n\
+                             ld        0,24(%0)\n\
+                             mtcrf     0x38,0\n\
+                             ld        0,0(%0)\n\
+                             ld        1,8(%0)\n\
+                             ld        2,16(%0)\n\
+                             mtlr      0\n\
+                             mr        3,1\n" : : "r" (curr_context));
+#endif
+}
+
+/*
+ * Global data
+ */
+struct kgdb_arch arch_kgdb_ops = {
+       .gdb_bpt_instr = {0x7d, 0x82, 0x10, 0x08},
+};
+
+int kgdb_not_implemented(struct pt_regs *regs)
+{
+       return 0;
+}
+
+int kgdb_arch_init(void)
+{
+#ifdef CONFIG_XMON
+#error Both XMON and KGDB selected in .config.  Unselect one of them.
+#endif
+
+       __debugger_ipi = kgdb_call_nmi_hook;
+       __debugger = kgdb_debugger;
+       __debugger_bpt = kgdb_breakpoint;
+       __debugger_sstep = kgdb_singlestep;
+       __debugger_iabr_match = kgdb_iabr_match;
+       __debugger_dabr_match = kgdb_dabr_match;
+       __debugger_fault_handler = kgdb_not_implemented;
+
+       return 0;
+}
+
+arch_initcall(kgdb_arch_init);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/powerpc/kernel/legacy_serial.c linux-2.6.18-53.1.14.kgdb/arch/powerpc/kernel/legacy_serial.c
--- linux-2.6.18-53.1.14/arch/powerpc/kernel/legacy_serial.c    2008-03-06 05:54:47.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/powerpc/kernel/legacy_serial.c       2008-06-10 15:38:14.000000000 +0400
@@ -11,6 +11,9 @@
 #include <asm/udbg.h>
 #include <asm/pci-bridge.h>
 #include <asm/ppc-pci.h>
+#ifdef CONFIG_KGDB_8250
+#include <linux/kgdb.h>
+#endif
 
 #undef DEBUG
 
@@ -485,6 +488,9 @@ static int __init serial_dev_init(void)
                        fixup_port_pio(i, np, port);
                if ((port->iotype == UPIO_MEM) || (port->iotype == UPIO_TSI))
                        fixup_port_mmio(i, np, port);
+#ifdef CONFIG_KGDB_8250
+               kgdb8250_add_platform_port(i, port);
+#endif
        }
 
        DBG("Registering platform serial ports\n");
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/powerpc/kernel/setup_32.c linux-2.6.18-53.1.14.kgdb/arch/powerpc/kernel/setup_32.c
--- linux-2.6.18-53.1.14/arch/powerpc/kernel/setup_32.c 2008-03-06 05:54:45.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/powerpc/kernel/setup_32.c    2008-06-10 15:38:14.000000000 +0400
@@ -45,10 +45,6 @@
 
 #define DBG(fmt...)
 
-#if defined CONFIG_KGDB
-#include <asm/kgdb.h>
-#endif
-
 extern void bootx_init(unsigned long r4, unsigned long phys);
 
 struct ide_machdep_calls ppc_ide_md;
@@ -251,18 +247,6 @@ void __init setup_arch(char **cmdline_p)
 
        xmon_setup();
 
-#if defined(CONFIG_KGDB)
-       if (ppc_md.kgdb_map_scc)
-               ppc_md.kgdb_map_scc();
-       set_debug_traps();
-       if (strstr(cmd_line, "gdb")) {
-               if (ppc_md.progress)
-                       ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
-               printk("kgdb breakpoint activated\n");
-               breakpoint();
-       }
-#endif
-
        /*
         * Set cache line size based on type of cpu as a default.
         * Systems with OF can look in the properties on the cpu node(s)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/powerpc/mm/fault.c linux-2.6.18-53.1.14.kgdb/arch/powerpc/mm/fault.c
--- linux-2.6.18-53.1.14/arch/powerpc/mm/fault.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/powerpc/mm/fault.c   2008-06-10 15:38:14.000000000 +0400
@@ -28,6 +28,7 @@
 #include <linux/highmem.h>
 #include <linux/module.h>
 #include <linux/kprobes.h>
+#include <linux/kgdb.h>
 
 #include <asm/page.h>
 #include <asm/pgtable.h>
@@ -424,6 +425,13 @@ void bad_page_fault(struct pt_regs *regs
                return;
        }
 
+#ifdef CONFIG_KGDB
+       if (atomic_read(&debugger_active) && kgdb_may_fault)
+               /* Restore our previous state. */
+               kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+               /* Not reached. */
+#endif
+
        /* kernel has accessed a bad area */
 
        printk(KERN_ALERT "Unable to handle kernel paging request for ");
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/powerpc/platforms/powermac/setup.c linux-2.6.18-53.1.14.kgdb/arch/powerpc/platforms/powermac/setup.c
--- linux-2.6.18-53.1.14/arch/powerpc/platforms/powermac/setup.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/powerpc/platforms/powermac/setup.c   2008-06-10 15:38:14.000000000 +0400
@@ -98,8 +98,6 @@ extern struct machdep_calls pmac_md;
 int sccdbg;
 #endif
 
-extern void zs_kgdb_hook(int tty_num);
-
 sys_ctrler_t sys_ctrler = SYS_CTRLER_UNKNOWN;
 EXPORT_SYMBOL(sys_ctrler);
 
@@ -319,10 +317,6 @@ static void __init pmac_setup_arch(void)
        l2cr_init();
 #endif /* CONFIG_PPC32 */
 
-#ifdef CONFIG_KGDB
-       zs_kgdb_hook(0);
-#endif
-
        find_via_cuda();
        find_via_pmu();
        smu_init();
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/Kconfig.debug linux-2.6.18-53.1.14.kgdb/arch/ppc/Kconfig.debug
--- linux-2.6.18-53.1.14/arch/ppc/Kconfig.debug 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/Kconfig.debug    2008-06-10 15:38:14.000000000 +0400
@@ -2,42 +2,6 @@ menu "Kernel hacking"
 
 source "lib/Kconfig.debug"
 
-config KGDB
-       bool "Include kgdb kernel debugger"
-       depends on DEBUG_KERNEL && (BROKEN || PPC_GEN550 || 4xx)
-       select DEBUG_INFO
-       help
-         Include in-kernel hooks for kgdb, the Linux kernel source level
-         debugger.  See <http://kgdb.sourceforge.net/> for more information.
-         Unless you are intending to debug the kernel, say N here.
-
-choice
-       prompt "Serial Port"
-       depends on KGDB
-       default KGDB_TTYS1
-
-config KGDB_TTYS0
-       bool "ttyS0"
-
-config KGDB_TTYS1
-       bool "ttyS1"
-
-config KGDB_TTYS2
-       bool "ttyS2"
-
-config KGDB_TTYS3
-       bool "ttyS3"
-
-endchoice
-
-config KGDB_CONSOLE
-       bool "Enable serial console thru kgdb port"
-       depends on KGDB && 8xx || CPM2
-       help
-         If you enable this, all serial console messages will be sent
-         over the gdb stub.
-         If unsure, say N.
-
 config XMON
        bool "Include xmon kernel debugger"
        depends on DEBUG_KERNEL
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/kernel/kgdb.c linux-2.6.18-53.1.14.kgdb/arch/ppc/kernel/kgdb.c
--- linux-2.6.18-53.1.14/arch/ppc/kernel/kgdb.c 1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/kernel/kgdb.c    2008-06-10 15:39:34.000000000 +0400
@@ -0,0 +1,350 @@
+/*
+ * arch/ppc/kernel/kgdb.c
+ *
+ * PowerPC backend to the KGDB stub.
+ *
+ * Maintainer: Tom Rini <trini@kernel.crashing.org>
+ *
+ * 1998 (c) Michael AK Tesch (tesch@cs.wisc.edu)
+ * Copyright (C) 2003 Timesys Corporation.
+ * 2004 (c) MontaVista Software, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program as licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/kgdb.h>
+#include <linux/smp.h>
+#include <linux/signal.h>
+#include <linux/ptrace.h>
+#include <asm/current.h>
+#include <asm/ptrace.h>
+#include <asm/processor.h>
+#include <asm/machdep.h>
+
+/*
+ * This table contains the mapping between PowerPC hardware trap types, and
+ * signals, which are primarily what GDB understands.  GDB and the kernel
+ * don't always agree on values, so we use constants taken from gdb-6.2.
+ */
+static struct hard_trap_info
+{
+       unsigned int tt;                /* Trap type code for powerpc */
+       unsigned char signo;            /* Signal that we map this trap into */
+} hard_trap_info[] = {
+#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
+       { 0x0100, 0x02 /* SIGINT */  },         /* critical input interrupt */
+       { 0x0200, 0x0b /* SIGSEGV */ },         /* machine check */
+       { 0x0300, 0x0b /* SIGSEGV */ },         /* data storage */
+       { 0x0400, 0x0a /* SIGBUS */  },         /* instruction storage */
+       { 0x0500, 0x02 /* SIGINT */  },         /* interrupt */
+       { 0x0600, 0x0a /* SIGBUS */  },         /* alignment */
+       { 0x0700, 0x04 /* SIGILL */  },         /* program */
+       { 0x0800, 0x04 /* SIGILL */  },         /* reserved */
+       { 0x0900, 0x04 /* SIGILL */  },         /* reserved */
+       { 0x0a00, 0x04 /* SIGILL */  },         /* reserved */
+       { 0x0b00, 0x04 /* SIGILL */  },         /* reserved */
+       { 0x0c00, 0x14 /* SIGCHLD */ },         /* syscall */
+       { 0x0d00, 0x04 /* SIGILL */  },         /* reserved */
+       { 0x0e00, 0x04 /* SIGILL */  },         /* reserved */
+       { 0x0f00, 0x04 /* SIGILL */  },         /* reserved */
+       { 0x2002, 0x05 /* SIGTRAP */},          /* debug */
+#else
+       { 0x0200, 0x0b /* SIGSEGV */ },         /* machine check */
+       { 0x0300, 0x0b /* SIGSEGV */ },         /* address error (store) */
+       { 0x0400, 0x0a /* SIGBUS */ },          /* instruction bus error */
+       { 0x0500, 0x02 /* SIGINT */ },          /* interrupt */
+       { 0x0600, 0x0a /* SIGBUS */ },          /* alingment */
+       { 0x0700, 0x05 /* SIGTRAP */ },         /* breakpoint trap */
+       { 0x0800, 0x08 /* SIGFPE */},           /* fpu unavail */
+       { 0x0900, 0x0e /* SIGALRM */ },         /* decrementer */
+       { 0x0a00, 0x04 /* SIGILL */ },          /* reserved */
+       { 0x0b00, 0x04 /* SIGILL */ },          /* reserved */
+       { 0x0c00, 0x14 /* SIGCHLD */ },         /* syscall */
+       { 0x0d00, 0x05 /* SIGTRAP */ },         /* single-step/watch */
+       { 0x0e00, 0x08 /* SIGFPE */ },          /* fp assist */
+#endif
+       { 0x0000, 0x000 }                       /* Must be last */
+};
+
+extern atomic_t cpu_doing_single_step;
+
+static int computeSignal(unsigned int tt)
+{
+       struct hard_trap_info *ht;
+
+       for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+               if (ht->tt == tt)
+                       return ht->signo;
+
+       return SIGHUP;          /* default for things we don't know about */
+}
+
+/* KGDB functions to use existing PowerPC hooks. */
+static void kgdb_debugger(struct pt_regs *regs)
+{
+       kgdb_handle_exception(0, computeSignal(TRAP(regs)), 0, regs);
+}
+
+static int kgdb_breakpoint(struct pt_regs *regs)
+{
+       if (user_mode(regs))
+               return 0;
+
+       kgdb_handle_exception(0, SIGTRAP, 0, regs);
+
+       if (*(u32 *) (regs->nip) == *(u32 *) (&arch_kgdb_ops.gdb_bpt_instr))
+               regs->nip += 4;
+
+       return 1;
+}
+
+static int kgdb_singlestep(struct pt_regs *regs)
+{
+       struct thread_info *thread_info, *exception_thread_info;
+
+       if (user_mode(regs))
+               return 0;
+       /*
+       * On Book E and perhaps other processsors, singlestep is handled on
+       * the critical exception stack.  This causes current_thread_info()
+       * to fail, since it it locates the thread_info by masking off
+       * the low bits of the current stack pointer.  We work around
+       * this issue by copying the thread_info from the kernel stack
+       * before calling kgdb_handle_exception, and copying it back
+       * afterwards.  On most processors the copy is avoided since
+       * exception_thread_info == thread_info.
+       */
+       thread_info = (struct thread_info *)(regs->gpr[1] & ~(THREAD_SIZE-1));
+       exception_thread_info = current_thread_info();
+
+       if (thread_info != exception_thread_info)
+               memcpy(exception_thread_info, thread_info, sizeof *thread_info);
+
+       kgdb_handle_exception(0, SIGTRAP, 0, regs);
+
+       if (thread_info != exception_thread_info)
+               memcpy(thread_info, exception_thread_info, sizeof *thread_info);
+
+       return 1;
+}
+
+int kgdb_iabr_match(struct pt_regs *regs)
+{
+       if (user_mode(regs))
+               return 0;
+
+       kgdb_handle_exception(0, computeSignal(TRAP(regs)), 0, regs);
+       return 1;
+}
+
+int kgdb_dabr_match(struct pt_regs *regs)
+{
+       if (user_mode(regs))
+               return 0;
+
+       kgdb_handle_exception(0, computeSignal(TRAP(regs)), 0, regs);
+       return 1;
+}
+
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+       int reg;
+       unsigned long *ptr = gdb_regs;
+
+       memset(gdb_regs, 0, MAXREG * 4);
+
+       for (reg = 0; reg < 32; reg++)
+               *(ptr++) = regs->gpr[reg];
+
+#ifndef CONFIG_E500
+       for (reg = 0; reg < 64; reg++)
+               *(ptr++) = 0;
+#else
+       for (reg = 0; reg < 32; reg++)
+               *(ptr++) = current->thread.evr[reg];
+#endif
+
+       *(ptr++) = regs->nip;
+       *(ptr++) = regs->msr;
+       *(ptr++) = regs->ccr;
+       *(ptr++) = regs->link;
+       *(ptr++) = regs->ctr;
+       *(ptr++) = regs->xer;
+
+#ifdef CONFIG_SPE
+       /* u64 acc */
+       *(ptr++) = (current->thread.acc >> 32);
+       *(ptr++) = (current->thread.acc & 0xffffffff);
+       *(ptr++) = current->thread.spefscr;
+#endif
+}
+
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+       struct pt_regs *regs = (struct pt_regs *)(p->thread.ksp +
+                                                 STACK_FRAME_OVERHEAD);
+       int reg;
+       unsigned long *ptr = gdb_regs;
+
+       memset(gdb_regs, 0, MAXREG * 4);
+
+       /* Regs GPR0-2 */
+       for (reg = 0; reg < 3; reg++)
+               *(ptr++) = regs->gpr[reg];
+
+       /* Regs GPR3-13 are not saved */
+       for (reg = 3; reg < 14; reg++)
+               *(ptr++) = 0;
+
+       /* Regs GPR14-31 */
+       for (reg = 14; reg < 32; reg++)
+               *(ptr++) = regs->gpr[reg];
+
+#ifndef CONFIG_E500
+       for (reg = 0; reg < 64; reg++)
+               *(ptr++) = 0;
+#else
+       for (reg = 0; reg < 32; reg++)
+               *(ptr++) = current->thread.evr[reg];
+#endif
+
+       *(ptr++) = regs->nip;
+       *(ptr++) = regs->msr;
+       *(ptr++) = regs->ccr;
+       *(ptr++) = regs->link;
+       *(ptr++) = regs->ctr;
+       *(ptr++) = regs->xer;
+
+#ifdef CONFIG_SPE
+       /* u64 acc */
+       *(ptr++) = (current->thread.acc >> 32);
+       *(ptr++) = (current->thread.acc & 0xffffffff);
+       *(ptr++) = current->thread.spefscr;
+#endif
+}
+
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+       int reg;
+       unsigned long *ptr = gdb_regs;
+#ifdef CONFIG_SPE
+       union {
+               u32 v32[2];
+               u64 v64;
+       } u;
+#endif
+
+       for (reg = 0; reg < 32; reg++)
+               regs->gpr[reg] = *(ptr++);
+
+#ifndef CONFIG_E500
+       for (reg = 0; reg < 64; reg++)
+               ptr++;
+#else
+       for (reg = 0; reg < 32; reg++)
+               current->thread.evr[reg] = *(ptr++);
+#endif
+
+       regs->nip = *(ptr++);
+       regs->msr = *(ptr++);
+       regs->ccr = *(ptr++);
+       regs->link = *(ptr++);
+       regs->ctr = *(ptr++);
+       regs->xer = *(ptr++);
+
+#ifdef CONFIG_SPE
+       /* u64 acc */
+       u.v32[0] = *(ptr++);
+       u.v32[1] = *(ptr++);
+       current->thread.acc = u.v64;
+       current->thread.spefscr = *(ptr++);
+#endif
+}
+
+/*
+ * Save/restore state in case a memory access causes a fault.
+ */
+int kgdb_fault_setjmp(unsigned long *curr_context)
+{
+       __asm__ __volatile__("mflr 0; stw 0,0(%0);"
+                            "stw 1,4(%0); stw 2,8(%0);"
+                            "mfcr 0; stw 0,12(%0);"
+                            "stmw 13,16(%0)"::"r"(curr_context));
+       return 0;
+}
+
+void kgdb_fault_longjmp(unsigned long *curr_context)
+{
+       __asm__ __volatile__("lmw 13,16(%0);"
+                            "lwz 0,12(%0); mtcrf 0x38,0;"
+                            "lwz 0,0(%0); lwz 1,4(%0); lwz 2,8(%0);"
+                            "mtlr 0; mr 3,1"::"r"(curr_context));
+}
+
+/*
+ * This function does PoerPC specific procesing for interfacing to gdb.
+ */
+int kgdb_arch_handle_exception(int vector, int signo, int err_code,
+                              char *remcom_in_buffer, char *remcom_out_buffer,
+                              struct pt_regs *linux_regs)
+{
+       char *ptr = &remcom_in_buffer[1];
+       unsigned long addr;
+
+       switch (remcom_in_buffer[0])
+               {
+               /*
+                * sAA..AA   Step one instruction from AA..AA
+                * This will return an error to gdb ..
+                */
+               case 's':
+               case 'c':
+                       /* handle the optional parameter */
+                       if (kgdb_hex2long (&ptr, &addr))
+                               linux_regs->nip = addr;
+
+                       atomic_set(&cpu_doing_single_step, -1);
+                       /* set the trace bit if we're stepping */
+                       if (remcom_in_buffer[0] == 's') {
+#if defined (CONFIG_40x) || defined(CONFIG_BOOKE)
+                               mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) |
+                                               DBCR0_IC | DBCR0_IDM);
+                               linux_regs->msr |= MSR_DE;
+#else
+                               linux_regs->msr |= MSR_SE;
+#endif
+                               debugger_step = 1;
+                               if (kgdb_contthread)
+                                       atomic_set(&cpu_doing_single_step,
+                                                       smp_processor_id());
+                       }
+                       return 0;
+       }
+
+       return -1;
+}
+
+/*
+ * Global data
+ */
+struct kgdb_arch arch_kgdb_ops = {
+       .gdb_bpt_instr = {0x7d, 0x82, 0x10, 0x08},
+};
+
+int kgdb_arch_init(void)
+{
+       debugger = kgdb_debugger;
+       debugger_bpt = kgdb_breakpoint;
+       debugger_sstep = kgdb_singlestep;
+       debugger_iabr_match = kgdb_iabr_match;
+       debugger_dabr_match = kgdb_dabr_match;
+
+       return 0;
+}
+
+arch_initcall(kgdb_arch_init);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/kernel/ppc-stub.c linux-2.6.18-53.1.14.kgdb/arch/ppc/kernel/ppc-stub.c
--- linux-2.6.18-53.1.14/arch/ppc/kernel/ppc-stub.c     2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/kernel/ppc-stub.c        1970-01-01 03:00:00.000000000 +0300
@@ -1,866 +0,0 @@
-/*
- * ppc-stub.c:  KGDB support for the Linux kernel.
- *
- * adapted from arch/sparc/kernel/sparc-stub.c for the PowerPC
- * some stuff borrowed from Paul Mackerras' xmon
- * Copyright (C) 1998 Michael AK Tesch (tesch@cs.wisc.edu)
- *
- * Modifications to run under Linux
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- *
- * This file originally came from the gdb sources, and the
- * copyright notices have been retained below.
- */
-
-/****************************************************************************
-
-               THIS SOFTWARE IS NOT COPYRIGHTED
-
-   HP offers the following for use in the public domain.  HP makes no
-   warranty with regard to the software or its performance and the
-   user accepts the software "AS IS" with all faults.
-
-   HP DISCLAIMS ANY WARRANTIES, EXPRESS OR IMPLIED, WITH REGARD
-   TO THIS SOFTWARE INCLUDING BUT NOT LIMITED TO THE WARRANTIES
-   OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-
-****************************************************************************/
-
-/****************************************************************************
- *  Header: remcom.c,v 1.34 91/03/09 12:29:49 glenne Exp $
- *
- *  Module name: remcom.c $
- *  Revision: 1.34 $
- *  Date: 91/03/09 12:29:49 $
- *  Contributor:     Lake Stevens Instrument Division$
- *
- *  Description:     low level support for gdb debugger. $
- *
- *  Considerations:  only works on target hardware $
- *
- *  Written by:      Glenn Engel $
- *  ModuleState:     Experimental $
- *
- *  NOTES:           See Below $
- *
- *  Modified for SPARC by Stu Grossman, Cygnus Support.
- *
- *  This code has been extensively tested on the Fujitsu SPARClite demo board.
- *
- *  To enable debugger support, two things need to happen.  One, a
- *  call to set_debug_traps() is necessary in order to allow any breakpoints
- *  or error conditions to be properly intercepted and reported to gdb.
- *  Two, a breakpoint needs to be generated to begin communication.  This
- *  is most easily accomplished by a call to breakpoint().  Breakpoint()
- *  simulates a breakpoint by executing a trap #1.
- *
- *************
- *
- *    The following gdb commands are supported:
- *
- * command          function                     Return value
- *
- *    g             return the value of the CPU registers  hex data or ENN
- *    G             set the value of the CPU registers     OK or ENN
- *    qOffsets      Get section offsets.  Reply is Text=xxx;Data=yyy;Bss=zzz
- *
- *    mAA..AA,LLLL  Read LLLL bytes at address AA..AA      hex data or ENN
- *    MAA..AA,LLLL: Write LLLL bytes at address AA.AA      OK or ENN
- *
- *    c             Resume at current address              SNN   ( signal NN)
- *    cAA..AA       Continue at address AA..AA             SNN
- *
- *    s             Step one instruction                   SNN
- *    sAA..AA       Step one instruction from AA..AA       SNN
- *
- *    k             kill
- *
- *    ?             What was the last sigval ?             SNN   (signal NN)
- *
- *    bBB..BB      Set baud rate to BB..BB                OK or BNN, then sets
- *                                                        baud rate
- *
- * All commands and responses are sent with a packet which includes a
- * checksum.  A packet consists of
- *
- * $<packet info>#<checksum>.
- *
- * where
- * <packet info> :: <characters representing the command or response>
- * <checksum>    :: <two hex digits computed as modulo 256 sum of <packetinfo>>
- *
- * When a packet is received, it is first acknowledged with either '+' or '-'.
- * '+' indicates a successful transfer.  '-' indicates a failed transfer.
- *
- * Example:
- *
- * Host:                  Reply:
- * $m0,10#2a               +$00010203040506070809101112131415#42
- *
- ****************************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/smp_lock.h>
-#include <linux/init.h>
-#include <linux/sysrq.h>
-
-#include <asm/cacheflush.h>
-#include <asm/system.h>
-#include <asm/signal.h>
-#include <asm/kgdb.h>
-#include <asm/pgtable.h>
-#include <asm/ptrace.h>
-
-void breakinst(void);
-
-/*
- * BUFMAX defines the maximum number of characters in inbound/outbound buffers
- * at least NUMREGBYTES*2 are needed for register packets
- */
-#define BUFMAX 2048
-static char remcomInBuffer[BUFMAX];
-static char remcomOutBuffer[BUFMAX];
-
-static int initialized;
-static int kgdb_active;
-static int kgdb_started;
-static u_int fault_jmp_buf[100];
-static int kdebug;
-
-
-static const char hexchars[]="0123456789abcdef";
-
-/* Place where we save old trap entries for restoration - sparc*/
-/* struct tt_entry kgdb_savettable[256]; */
-/* typedef void (*trapfunc_t)(void); */
-
-static void kgdb_fault_handler(struct pt_regs *regs);
-static int handle_exception (struct pt_regs *regs);
-
-#if 0
-/* Install an exception handler for kgdb */
-static void exceptionHandler(int tnum, unsigned int *tfunc)
-{
-       /* We are dorking with a live trap table, all irqs off */
-}
-#endif
-
-int
-kgdb_setjmp(long *buf)
-{
-       asm ("mflr 0; stw 0,0(%0);"
-            "stw 1,4(%0); stw 2,8(%0);"
-            "mfcr 0; stw 0,12(%0);"
-            "stmw 13,16(%0)"
-            : : "r" (buf));
-       /* XXX should save fp regs as well */
-       return 0;
-}
-void
-kgdb_longjmp(long *buf, int val)
-{
-       if (val == 0)
-               val = 1;
-       asm ("lmw 13,16(%0);"
-            "lwz 0,12(%0); mtcrf 0x38,0;"
-            "lwz 0,0(%0); lwz 1,4(%0); lwz 2,8(%0);"
-            "mtlr 0; mr 3,%1"
-            : : "r" (buf), "r" (val));
-}
-/* Convert ch from a hex digit to an int */
-static int
-hex(unsigned char ch)
-{
-       if (ch >= 'a' && ch <= 'f')
-               return ch-'a'+10;
-       if (ch >= '0' && ch <= '9')
-               return ch-'0';
-       if (ch >= 'A' && ch <= 'F')
-               return ch-'A'+10;
-       return -1;
-}
-
-/* Convert the memory pointed to by mem into hex, placing result in buf.
- * Return a pointer to the last char put in buf (null), in case of mem fault,
- * return 0.
- */
-static unsigned char *
-mem2hex(const char *mem, char *buf, int count)
-{
-       unsigned char ch;
-       unsigned short tmp_s;
-       unsigned long tmp_l;
-
-       if (kgdb_setjmp((long*)fault_jmp_buf) == 0) {
-               debugger_fault_handler = kgdb_fault_handler;
-
-               /* Accessing 16 bit and 32 bit objects in a single
-               ** load instruction is required to avoid bad side
-               ** effects for some IO registers.
-               */
-
-               if ((count == 2) && (((long)mem & 1) == 0)) {
-                       tmp_s = *(unsigned short *)mem;
-                       mem += 2;
-                       *buf++ = hexchars[(tmp_s >> 12) & 0xf];
-                       *buf++ = hexchars[(tmp_s >> 8) & 0xf];
-                       *buf++ = hexchars[(tmp_s >> 4) & 0xf];
-                       *buf++ = hexchars[tmp_s & 0xf];
-
-               } else if ((count == 4) && (((long)mem & 3) == 0)) {
-                       tmp_l = *(unsigned int *)mem;
-                       mem += 4;
-                       *buf++ = hexchars[(tmp_l >> 28) & 0xf];
-                       *buf++ = hexchars[(tmp_l >> 24) & 0xf];
-                       *buf++ = hexchars[(tmp_l >> 20) & 0xf];
-                       *buf++ = hexchars[(tmp_l >> 16) & 0xf];
-                       *buf++ = hexchars[(tmp_l >> 12) & 0xf];
-                       *buf++ = hexchars[(tmp_l >> 8) & 0xf];
-                       *buf++ = hexchars[(tmp_l >> 4) & 0xf];
-                       *buf++ = hexchars[tmp_l & 0xf];
-
-               } else {
-                       while (count-- > 0) {
-                               ch = *mem++;
-                               *buf++ = hexchars[ch >> 4];
-                               *buf++ = hexchars[ch & 0xf];
-                       }
-               }
-
-       } else {
-               /* error condition */
-       }
-       debugger_fault_handler = NULL;
-       *buf = 0;
-       return buf;
-}
-
-/* convert the hex array pointed to by buf into binary to be placed in mem
- * return a pointer to the character AFTER the last byte written.
-*/
-static char *
-hex2mem(char *buf, char *mem, int count)
-{
-       unsigned char ch;
-       int i;
-       char *orig_mem;
-       unsigned short tmp_s;
-       unsigned long tmp_l;
-
-       orig_mem = mem;
-
-       if (kgdb_setjmp((long*)fault_jmp_buf) == 0) {
-               debugger_fault_handler = kgdb_fault_handler;
-
-               /* Accessing 16 bit and 32 bit objects in a single
-               ** store instruction is required to avoid bad side
-               ** effects for some IO registers.
-               */
-
-               if ((count == 2) && (((long)mem & 1) == 0)) {
-                       tmp_s = hex(*buf++) << 12;
-                       tmp_s |= hex(*buf++) << 8;
-                       tmp_s |= hex(*buf++) << 4;
-                       tmp_s |= hex(*buf++);
-
-                       *(unsigned short *)mem = tmp_s;
-                       mem += 2;
-
-               } else if ((count == 4) && (((long)mem & 3) == 0)) {
-                       tmp_l = hex(*buf++) << 28;
-                       tmp_l |= hex(*buf++) << 24;
-                       tmp_l |= hex(*buf++) << 20;
-                       tmp_l |= hex(*buf++) << 16;
-                       tmp_l |= hex(*buf++) << 12;
-                       tmp_l |= hex(*buf++) << 8;
-                       tmp_l |= hex(*buf++) << 4;
-                       tmp_l |= hex(*buf++);
-
-                       *(unsigned long *)mem = tmp_l;
-                       mem += 4;
-
-               } else {
-                       for (i=0; i<count; i++) {
-                               ch = hex(*buf++) << 4;
-                               ch |= hex(*buf++);
-                               *mem++ = ch;
-                       }
-               }
-
-
-               /*
-               ** Flush the data cache, invalidate the instruction cache.
-               */
-               flush_icache_range((int)orig_mem, (int)orig_mem + count - 1);
-
-       } else {
-               /* error condition */
-       }
-       debugger_fault_handler = NULL;
-       return mem;
-}
-
-/*
- * While we find nice hex chars, build an int.
- * Return number of chars processed.
- */
-static int
-hexToInt(char **ptr, int *intValue)
-{
-       int numChars = 0;
-       int hexValue;
-
-       *intValue = 0;
-
-       if (kgdb_setjmp((long*)fault_jmp_buf) == 0) {
-               debugger_fault_handler = kgdb_fault_handler;
-               while (**ptr) {
-                       hexValue = hex(**ptr);
-                       if (hexValue < 0)
-                               break;
-
-                       *intValue = (*intValue << 4) | hexValue;
-                       numChars ++;
-
-                       (*ptr)++;
-               }
-       } else {
-               /* error condition */
-       }
-       debugger_fault_handler = NULL;
-
-       return (numChars);
-}
-
-/* scan for the sequence $<data>#<checksum> */
-static void
-getpacket(char *buffer)
-{
-       unsigned char checksum;
-       unsigned char xmitcsum;
-       int i;
-       int count;
-       unsigned char ch;
-
-       do {
-               /* wait around for the start character, ignore all other
-                * characters */
-               while ((ch = (getDebugChar() & 0x7f)) != '$') ;
-
-               checksum = 0;
-               xmitcsum = -1;
-
-               count = 0;
-
-               /* now, read until a # or end of buffer is found */
-               while (count < BUFMAX) {
-                       ch = getDebugChar() & 0x7f;
-                       if (ch == '#')
-                               break;
-                       checksum = checksum + ch;
-                       buffer[count] = ch;
-                       count = count + 1;
-               }
-
-               if (count >= BUFMAX)
-                       continue;
-
-               buffer[count] = 0;
-
-               if (ch == '#') {
-                       xmitcsum = hex(getDebugChar() & 0x7f) << 4;
-                       xmitcsum |= hex(getDebugChar() & 0x7f);
-                       if (checksum != xmitcsum)
-                               putDebugChar('-');      /* failed checksum */
-                       else {
-                               putDebugChar('+'); /* successful transfer */
-                               /* if a sequence char is present, reply the ID */
-                               if (buffer[2] == ':') {
-                                       putDebugChar(buffer[0]);
-                                       putDebugChar(buffer[1]);
-                                       /* remove sequence chars from buffer */
-                                       count = strlen(buffer);
-                                       for (i=3; i <= count; i++)
-                                               buffer[i-3] = buffer[i];
-                               }
-                       }
-               }
-       } while (checksum != xmitcsum);
-}
-
-/* send the packet in buffer. */
-static void putpacket(unsigned char *buffer)
-{
-       unsigned char checksum;
-       int count;
-       unsigned char ch, recv;
-
-       /* $<packet info>#<checksum>. */
-       do {
-               putDebugChar('$');
-               checksum = 0;
-               count = 0;
-
-               while ((ch = buffer[count])) {
-                       putDebugChar(ch);
-                       checksum += ch;
-                       count += 1;
-               }
-
-               putDebugChar('#');
-               putDebugChar(hexchars[checksum >> 4]);
-               putDebugChar(hexchars[checksum & 0xf]);
-               recv = getDebugChar();
-       } while ((recv & 0x7f) != '+');
-}
-
-static void kgdb_flush_cache_all(void)
-{
-       flush_instruction_cache();
-}
-
-/* Set up exception handlers for tracing and breakpoints
- * [could be called kgdb_init()]
- */
-void set_debug_traps(void)
-{
-#if 0
-       unsigned char c;
-
-       save_and_cli(flags);
-
-       /* In case GDB is started before us, ack any packets (presumably
-        * "$?#xx") sitting there.
-        *
-        * I've found this code causes more problems than it solves,
-        * so that's why it's commented out.  GDB seems to work fine
-        * now starting either before or after the kernel   -bwb
-        */
-
-       while((c = getDebugChar()) != '$');
-       while((c = getDebugChar()) != '#');
-       c = getDebugChar(); /* eat first csum byte */
-       c = getDebugChar(); /* eat second csum byte */
-       putDebugChar('+'); /* ack it */
-#endif
-       debugger = kgdb;
-       debugger_bpt = kgdb_bpt;
-       debugger_sstep = kgdb_sstep;
-       debugger_iabr_match = kgdb_iabr_match;
-       debugger_dabr_match = kgdb_dabr_match;
-
-       initialized = 1;
-}
-
-static void kgdb_fault_handler(struct pt_regs *regs)
-{
-       kgdb_longjmp((long*)fault_jmp_buf, 1);
-}
-
-int kgdb_bpt(struct pt_regs *regs)
-{
-       return handle_exception(regs);
-}
-
-int kgdb_sstep(struct pt_regs *regs)
-{
-       return handle_exception(regs);
-}
-
-void kgdb(struct pt_regs *regs)
-{
-       handle_exception(regs);
-}
-
-int kgdb_iabr_match(struct pt_regs *regs)
-{
-       printk(KERN_ERR "kgdb doesn't support iabr, what?!?\n");
-       return handle_exception(regs);
-}
-
-int kgdb_dabr_match(struct pt_regs *regs)
-{
-       printk(KERN_ERR "kgdb doesn't support dabr, what?!?\n");
-       return handle_exception(regs);
-}
-
-/* Convert the hardware trap type code to a unix signal number. */
-/*
- * This table contains the mapping between PowerPC hardware trap types, and
- * signals, which are primarily what GDB understands.
- */
-static struct hard_trap_info
-{
-       unsigned int tt;                /* Trap type code for powerpc */
-       unsigned char signo;            /* Signal that we map this trap into */
-} hard_trap_info[] = {
-#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
-       { 0x100, SIGINT  },             /* critical input interrupt */
-       { 0x200, SIGSEGV },             /* machine check */
-       { 0x300, SIGSEGV },             /* data storage */
-       { 0x400, SIGBUS  },             /* instruction storage */
-       { 0x500, SIGINT  },             /* interrupt */
-       { 0x600, SIGBUS  },             /* alignment */
-       { 0x700, SIGILL  },             /* program */
-       { 0x800, SIGILL  },             /* reserved */
-       { 0x900, SIGILL  },             /* reserved */
-       { 0xa00, SIGILL  },             /* reserved */
-       { 0xb00, SIGILL  },             /* reserved */
-       { 0xc00, SIGCHLD },             /* syscall */
-       { 0xd00, SIGILL  },             /* reserved */
-       { 0xe00, SIGILL  },             /* reserved */
-       { 0xf00, SIGILL  },             /* reserved */
-       /*
-       ** 0x1000  PIT
-       ** 0x1010  FIT
-       ** 0x1020  watchdog
-       ** 0x1100  data TLB miss
-       ** 0x1200  instruction TLB miss
-       */
-       { 0x2002, SIGTRAP},             /* debug */
-#else
-       { 0x200, SIGSEGV },             /* machine check */
-       { 0x300, SIGSEGV },             /* address error (store) */
-       { 0x400, SIGBUS },              /* instruction bus error */
-       { 0x500, SIGINT },              /* interrupt */
-       { 0x600, SIGBUS },              /* alingment */
-       { 0x700, SIGTRAP },             /* breakpoint trap */
-       { 0x800, SIGFPE },              /* fpu unavail */
-       { 0x900, SIGALRM },             /* decrementer */
-       { 0xa00, SIGILL },              /* reserved */
-       { 0xb00, SIGILL },              /* reserved */
-       { 0xc00, SIGCHLD },             /* syscall */
-       { 0xd00, SIGTRAP },             /* single-step/watch */
-       { 0xe00, SIGFPE },              /* fp assist */
-#endif
-       { 0, 0}                         /* Must be last */
-
-};
-
-static int computeSignal(unsigned int tt)
-{
-       struct hard_trap_info *ht;
-
-       for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
-               if (ht->tt == tt)
-                       return ht->signo;
-
-       return SIGHUP; /* default for things we don't know about */
-}
-
-#define PC_REGNUM 64
-#define SP_REGNUM 1
-
-/*
- * This function does all command processing for interfacing to gdb.
- */
-static int
-handle_exception (struct pt_regs *regs)
-{
-       int sigval;
-       int addr;
-       int length;
-       char *ptr;
-       unsigned int msr;
-
-       /* We don't handle user-mode breakpoints. */
-       if (user_mode(regs))
-               return 0;
-
-       if (debugger_fault_handler) {
-               debugger_fault_handler(regs);
-               panic("kgdb longjump failed!\n");
-       }
-       if (kgdb_active) {
-               printk(KERN_ERR "interrupt while in kgdb, returning\n");
-               return 0;
-       }
-
-       kgdb_active = 1;
-       kgdb_started = 1;
-
-#ifdef KGDB_DEBUG
-       printk("kgdb: entering handle_exception; trap [0x%x]\n",
-                       (unsigned int)regs->trap);
-#endif
-
-       kgdb_interruptible(0);
-       lock_kernel();
-       msr = mfmsr();
-       mtmsr(msr & ~MSR_EE);   /* disable interrupts */
-
-       if (regs->nip == (unsigned long)breakinst) {
-               /* Skip over breakpoint trap insn */
-               regs->nip += 4;
-       }
-
-       /* reply to host that an exception has occurred */
-       sigval = computeSignal(regs->trap);
-       ptr = remcomOutBuffer;
-
-       *ptr++ = 'T';
-       *ptr++ = hexchars[sigval >> 4];
-       *ptr++ = hexchars[sigval & 0xf];
-       *ptr++ = hexchars[PC_REGNUM >> 4];
-       *ptr++ = hexchars[PC_REGNUM & 0xf];
-       *ptr++ = ':';
-       ptr = mem2hex((char *)&regs->nip, ptr, 4);
-       *ptr++ = ';';
-       *ptr++ = hexchars[SP_REGNUM >> 4];
-       *ptr++ = hexchars[SP_REGNUM & 0xf];
-       *ptr++ = ':';
-       ptr = mem2hex(((char *)regs) + SP_REGNUM*4, ptr, 4);
-       *ptr++ = ';';
-       *ptr++ = 0;
-
-       putpacket(remcomOutBuffer);
-       if (kdebug)
-               printk("remcomOutBuffer: %s\n", remcomOutBuffer);
-
-       /* XXX We may want to add some features dealing with poking the
-        * XXX page tables, ... (look at sparc-stub.c for more info)
-        * XXX also required hacking to the gdb sources directly...
-        */
-
-       while (1) {
-               remcomOutBuffer[0] = 0;
-
-               getpacket(remcomInBuffer);
-               switch (remcomInBuffer[0]) {
-               case '?': /* report most recent signal */
-                       remcomOutBuffer[0] = 'S';
-                       remcomOutBuffer[1] = hexchars[sigval >> 4];
-                       remcomOutBuffer[2] = hexchars[sigval & 0xf];
-                       remcomOutBuffer[3] = 0;
-                       break;
-#if 0
-               case 'q': /* this screws up gdb for some reason...*/
-               {
-                       extern long _start, sdata, __bss_start;
-
-                       ptr = &remcomInBuffer[1];
-                       if (strncmp(ptr, "Offsets", 7) != 0)
-                               break;
-
-                       ptr = remcomOutBuffer;
-                       sprintf(ptr, "Text=%8.8x;Data=%8.8x;Bss=%8.8x",
-                               &_start, &sdata, &__bss_start);
-                       break;
-               }
-#endif
-               case 'd':
-                       /* toggle debug flag */
-                       kdebug ^= 1;
-                       break;
-
-               case 'g':       /* return the value of the CPU registers.
-                                * some of them are non-PowerPC names :(
-                                * they are stored in gdb like:
-                                * struct {
-                                *     u32 gpr[32];
-                                *     f64 fpr[32];
-                                *     u32 pc, ps, cnd, lr; (ps=msr)
-                                *     u32 cnt, xer, mq;
-                                * }
-                                */
-               {
-                       int i;
-                       ptr = remcomOutBuffer;
-                       /* General Purpose Regs */
-                       ptr = mem2hex((char *)regs, ptr, 32 * 4);
-                       /* Floating Point Regs - FIXME */
-                       /*ptr = mem2hex((char *), ptr, 32 * 8);*/
-                       for(i=0; i<(32*8*2); i++) { /* 2chars/byte */
-                               ptr[i] = '0';
-                       }
-                       ptr += 32*8*2;
-                       /* pc, msr, cr, lr, ctr, xer, (mq is unused) */
-                       ptr = mem2hex((char *)&regs->nip, ptr, 4);
-                       ptr = mem2hex((char *)&regs->msr, ptr, 4);
-                       ptr = mem2hex((char *)&regs->ccr, ptr, 4);
-                       ptr = mem2hex((char *)&regs->link, ptr, 4);
-                       ptr = mem2hex((char *)&regs->ctr, ptr, 4);
-                       ptr = mem2hex((char *)&regs->xer, ptr, 4);
-               }
-                       break;
-
-               case 'G': /* set the value of the CPU registers */
-               {
-                       ptr = &remcomInBuffer[1];
-
-                       /*
-                        * If the stack pointer has moved, you should pray.
-                        * (cause only god can help you).
-                        */
-
-                       /* General Purpose Regs */
-                       hex2mem(ptr, (char *)regs, 32 * 4);
-
-                       /* Floating Point Regs - FIXME?? */
-                       /*ptr = hex2mem(ptr, ??, 32 * 8);*/
-                       ptr += 32*8*2;
-
-                       /* pc, msr, cr, lr, ctr, xer, (mq is unused) */
-                       ptr = hex2mem(ptr, (char *)&regs->nip, 4);
-                       ptr = hex2mem(ptr, (char *)&regs->msr, 4);
-                       ptr = hex2mem(ptr, (char *)&regs->ccr, 4);
-                       ptr = hex2mem(ptr, (char *)&regs->link, 4);
-                       ptr = hex2mem(ptr, (char *)&regs->ctr, 4);
-                       ptr = hex2mem(ptr, (char *)&regs->xer, 4);
-
-                       strcpy(remcomOutBuffer,"OK");
-               }
-                       break;
-               case 'H':
-                       /* don't do anything, yet, just acknowledge */
-                       hexToInt(&ptr, &addr);
-                       strcpy(remcomOutBuffer,"OK");
-                       break;
-
-               case 'm':       /* mAA..AA,LLLL  Read LLLL bytes at address AA..AA */
-                               /* Try to read %x,%x.  */
-
-                       ptr = &remcomInBuffer[1];
-
-                       if (hexToInt(&ptr, &addr) && *ptr++ == ','
-                                       && hexToInt(&ptr, &length)) {
-                               if (mem2hex((char *)addr, remcomOutBuffer,
-                                                       length))
-                                       break;
-                               strcpy(remcomOutBuffer, "E03");
-                       } else
-                               strcpy(remcomOutBuffer, "E01");
-                       break;
-
-               case 'M': /* MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK */
-                       /* Try to read '%x,%x:'.  */
-
-                       ptr = &remcomInBuffer[1];
-
-                       if (hexToInt(&ptr, &addr) && *ptr++ == ','
-                                       && hexToInt(&ptr, &length)
-                                       && *ptr++ == ':') {
-                               if (hex2mem(ptr, (char *)addr, length))
-                                       strcpy(remcomOutBuffer, "OK");
-                               else
-                                       strcpy(remcomOutBuffer, "E03");
-                               flush_icache_range(addr, addr+length);
-                       } else
-                               strcpy(remcomOutBuffer, "E02");
-                       break;
-
-
-               case 'k': /* kill the program, actually just continue */
-               case 'c': /* cAA..AA  Continue; address AA..AA optional */
-                       /* try to read optional parameter, pc unchanged if no parm */
-
-                       ptr = &remcomInBuffer[1];
-                       if (hexToInt(&ptr, &addr))
-                               regs->nip = addr;
-
-/* Need to flush the instruction cache here, as we may have deposited a
- * breakpoint, and the icache probably has no way of knowing that a data ref to
- * some location may have changed something that is in the instruction cache.
- */
-                       kgdb_flush_cache_all();
-                       mtmsr(msr);
-
-                       kgdb_interruptible(1);
-                       unlock_kernel();
-                       kgdb_active = 0;
-                       if (kdebug) {
-                               printk("remcomInBuffer: %s\n", remcomInBuffer);
-                               printk("remcomOutBuffer: %s\n", remcomOutBuffer);
-                       }
-                       return 1;
-
-               case 's':
-                       kgdb_flush_cache_all();
-#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
-                       mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC);
-                       regs->msr |= MSR_DE;
-#else
-                       regs->msr |= MSR_SE;
-#endif
-                       unlock_kernel();
-                       kgdb_active = 0;
-                       if (kdebug) {
-                               printk("remcomInBuffer: %s\n", remcomInBuffer);
-                               printk("remcomOutBuffer: %s\n", remcomOutBuffer);
-                       }
-                       return 1;
-
-               case 'r':               /* Reset (if user process..exit ???)*/
-                       panic("kgdb reset.");
-                       break;
-               }                       /* switch */
-               if (remcomOutBuffer[0] && kdebug) {
-                       printk("remcomInBuffer: %s\n", remcomInBuffer);
-                       printk("remcomOutBuffer: %s\n", remcomOutBuffer);
-               }
-               /* reply to the request */
-               putpacket(remcomOutBuffer);
-       } /* while(1) */
-}
-
-/* This function will generate a breakpoint exception.  It is used at the
-   beginning of a program to sync up with a debugger and can be used
-   otherwise as a quick means to stop program execution and "break" into
-   the debugger. */
-
-void
-breakpoint(void)
-{
-       if (!initialized) {
-               printk("breakpoint() called b4 kgdb init\n");
-               return;
-       }
-
-       asm("   .globl breakinst        \n\
-            breakinst: .long 0x7d821008");
-}
-
-#ifdef CONFIG_KGDB_CONSOLE
-/* Output string in GDB O-packet format if GDB has connected. If nothing
-   output, returns 0 (caller must then handle output). */
-int
-kgdb_output_string (const char* s, unsigned int count)
-{
-       char buffer[512];
-
-       if (!kgdb_started)
-               return 0;
-
-       count = (count <= (sizeof(buffer) / 2 - 2))
-               ? count : (sizeof(buffer) / 2 - 2);
-
-       buffer[0] = 'O';
-       mem2hex (s, &buffer[1], count);
-       putpacket(buffer);
-
-       return 1;
-}
-#endif
-
-static void sysrq_handle_gdb(int key, struct pt_regs *pt_regs,
-                            struct tty_struct *tty)
-{
-       printk("Entering GDB stub\n");
-       breakpoint();
-}
-static struct sysrq_key_op sysrq_gdb_op = {
-        .handler        = sysrq_handle_gdb,
-        .help_msg       = "Gdb",
-        .action_msg     = "GDB",
-};
-
-static int gdb_register_sysrq(void)
-{
-       printk("Registering GDB sysrq handler\n");
-       register_sysrq_key('g', &sysrq_gdb_op);
-       return 0;
-}
-module_init(gdb_register_sysrq);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/kernel/setup.c linux-2.6.18-53.1.14.kgdb/arch/ppc/kernel/setup.c
--- linux-2.6.18-53.1.14/arch/ppc/kernel/setup.c        2008-03-06 05:54:43.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/kernel/setup.c   2008-06-10 15:38:14.000000000 +0400
@@ -48,10 +48,6 @@
 #include <asm/ppc_sys.h>
 #endif
 
-#if defined CONFIG_KGDB
-#include <asm/kgdb.h>
-#endif
-
 extern void platform_init(unsigned long r3, unsigned long r4,
                unsigned long r5, unsigned long r6, unsigned long r7);
 extern void reloc_got2(unsigned long offset);
@@ -506,18 +502,6 @@ void __init setup_arch(char **cmdline_p)
 #endif /* CONFIG_XMON */
        if ( ppc_md.progress ) ppc_md.progress("setup_arch: enter", 0x3eab);
 
-#if defined(CONFIG_KGDB)
-       if (ppc_md.kgdb_map_scc)
-               ppc_md.kgdb_map_scc();
-       set_debug_traps();
-       if (strstr(cmd_line, "gdb")) {
-               if (ppc_md.progress)
-                       ppc_md.progress("setup_arch: kgdb breakpoint", 0x4000);
-               printk("kgdb breakpoint activated\n");
-               breakpoint();
-       }
-#endif
-
        /*
         * Set cache line size based on type of cpu as a default.
         * Systems with OF can look in the properties on the cpu node(s)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/mm/fault.c linux-2.6.18-53.1.14.kgdb/arch/ppc/mm/fault.c
--- linux-2.6.18-53.1.14/arch/ppc/mm/fault.c    2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/mm/fault.c       2008-06-10 15:38:14.000000000 +0400
@@ -25,6 +25,7 @@
 #include <linux/interrupt.h>
 #include <linux/highmem.h>
 #include <linux/module.h>
+#include <linux/kgdb.h>
 
 #include <asm/page.h>
 #include <asm/pgtable.h>
@@ -329,6 +330,14 @@ bad_page_fault(struct pt_regs *regs, uns
                return;
        }
 
+#ifdef CONFIG_KGDB
+       if (atomic_read(&debugger_active) && kgdb_may_fault) {
+               /* Restore our previous state. */
+               kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+               /* Not reached. */
+       }
+#endif
+
        /* kernel has accessed a bad area */
 #if defined(CONFIG_XMON) || defined(CONFIG_KGDB)
        if (debugger_kernel_faults)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/platforms/4xx/bubinga.c linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/4xx/bubinga.c
--- linux-2.6.18-53.1.14/arch/ppc/platforms/4xx/bubinga.c       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/4xx/bubinga.c  2008-06-10 15:38:14.000000000 +0400
@@ -4,7 +4,7 @@
  * Author: SAW (IBM), derived from walnut.c.
  *         Maintained by MontaVista Software <source@mvista.com>
  *
- * 2003 (c) MontaVista Softare Inc.  This file is licensed under the
+ * 2003-2004 (c) MontaVista Softare Inc.  This file is licensed under the
  * terms of the GNU General Public License version 2. This program is
  * licensed "as is" without any warranty of any kind, whether express
  * or implied.
@@ -100,17 +100,26 @@ bubinga_early_serial_map(void)
        port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
        port.line = 0;
 
-       if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+       if (early_serial_setup(&port) != 0)
                printk("Early serial init of port 0 failed\n");
-       }
+#endif
+
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &port);
+#endif
 
        port.membase = (void*)ACTING_UART1_IO_BASE;
        port.irq = ACTING_UART1_INT;
        port.line = 1;
 
-       if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+       if (early_serial_setup(&port) != 0)
                printk("Early serial init of port 1 failed\n");
-       }
+#endif
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(1, &port);
+#endif
 }
 
 void __init
@@ -255,8 +264,4 @@ platform_init(unsigned long r3, unsigned
        ppc_md.nvram_read_val = todc_direct_read_val;
        ppc_md.nvram_write_val = todc_direct_write_val;
 #endif
-#ifdef CONFIG_KGDB
-       ppc_md.early_serial_map = bubinga_early_serial_map;
-#endif
 }
-
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/platforms/4xx/ebony.c linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/4xx/ebony.c
--- linux-2.6.18-53.1.14/arch/ppc/platforms/4xx/ebony.c 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/4xx/ebony.c    2008-06-10 15:38:14.000000000 +0400
@@ -32,6 +32,7 @@
 #include <linux/tty.h>
 #include <linux/serial.h>
 #include <linux/serial_core.h>
+#include <linux/kgdb.h>
 
 #include <asm/system.h>
 #include <asm/pgtable.h>
@@ -226,14 +227,20 @@ ebony_early_serial_map(void)
        port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
        port.line = 0;
 
-       if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+       if (early_serial_setup(&port) != 0)
                printk("Early serial init of port 0 failed\n");
-       }
+#endif
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
        /* Configure debug serial access */
        gen550_init(0, &port);
+#endif
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &port);
+#endif
 
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB_8250)
        /* Purge TLB entry added in head_44x.S for early serial access */
        _tlbie(UART0_IO_BASE);
 #endif
@@ -243,14 +250,18 @@ ebony_early_serial_map(void)
        port.uartclk = clocks.uart1;
        port.line = 1;
 
-       if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+       if (early_serial_setup(&port) != 1)
                printk("Early serial init of port 1 failed\n");
-       }
+#endif
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
        /* Configure debug serial access */
        gen550_init(1, &port);
 #endif
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(1, &port);
+#endif
 }
 
 static void __init
@@ -327,8 +338,4 @@ void __init platform_init(unsigned long 
 
        ppc_md.nvram_read_val = todc_direct_read_val;
        ppc_md.nvram_write_val = todc_direct_write_val;
-#ifdef CONFIG_KGDB
-       ppc_md.early_serial_map = ebony_early_serial_map;
-#endif
 }
-
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/platforms/4xx/ocotea.c linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/4xx/ocotea.c
--- linux-2.6.18-53.1.14/arch/ppc/platforms/4xx/ocotea.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/4xx/ocotea.c   2008-06-10 15:38:14.000000000 +0400
@@ -30,6 +30,7 @@
 #include <linux/tty.h>
 #include <linux/serial.h>
 #include <linux/serial_core.h>
+#include <linux/kgdb.h>
 
 #include <asm/system.h>
 #include <asm/pgtable.h>
@@ -249,14 +250,20 @@ ocotea_early_serial_map(void)
        port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
        port.line = 0;
 
-       if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+       if (early_serial_setup(&port) != 0)
                printk("Early serial init of port 0 failed\n");
-       }
+#endif
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
        /* Configure debug serial access */
        gen550_init(0, &port);
+#endif
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &port);
+#endif
 
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB_8250)
        /* Purge TLB entry added in head_44x.S for early serial access */
        _tlbie(UART0_IO_BASE);
 #endif
@@ -266,14 +273,18 @@ ocotea_early_serial_map(void)
        port.uartclk = clocks.uart1;
        port.line = 1;
 
-       if (early_serial_setup(&port) != 0) {
+#ifdef CONFIG_SERIAL_8250
+       if (early_serial_setup(&port) != 1)
                printk("Early serial init of port 1 failed\n");
-       }
+#endif
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
        /* Configure debug serial access */
        gen550_init(1, &port);
 #endif
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(1, &port);
+#endif
 }
 
 static void __init
@@ -343,8 +354,5 @@ void __init platform_init(unsigned long 
 
        ppc_md.nvram_read_val = todc_direct_read_val;
        ppc_md.nvram_write_val = todc_direct_write_val;
-#ifdef CONFIG_KGDB
-       ppc_md.early_serial_map = ocotea_early_serial_map;
-#endif
        ppc_md.init = ocotea_init;
 }
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/platforms/4xx/xilinx_ml300.c linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/4xx/xilinx_ml300.c
--- linux-2.6.18-53.1.14/arch/ppc/platforms/4xx/xilinx_ml300.c  2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/4xx/xilinx_ml300.c     2008-06-10 15:38:14.000000000 +0400
@@ -41,9 +41,6 @@
  *      ppc4xx_map_io                          arch/ppc/syslib/ppc4xx_setup.c
  *  start_kernel                               init/main.c
  *    setup_arch                               arch/ppc/kernel/setup.c
- * #if defined(CONFIG_KGDB)
- *      *ppc_md.kgdb_map_scc() == gen550_kgdb_map_scc
- * #endif
  *      *ppc_md.setup_arch == ml300_setup_arch this file
  *        ppc4xx_setup_arch                    arch/ppc/syslib/ppc4xx_setup.c
  *          ppc4xx_find_bridges                        arch/ppc/syslib/ppc405_pci.c
@@ -117,7 +114,6 @@ ml300_early_serial_init(int num, struct 
 void __init
 ml300_early_serial_map(void)
 {
-#ifdef CONFIG_SERIAL_8250
        struct plat_serial8250_port *pdata;
        int i = 0;
 
@@ -129,7 +125,14 @@ ml300_early_serial_map(void)
                pdata++;
                i++;
        }
-#endif /* CONFIG_SERIAL_8250 */
+#ifdef CONFIG_SERIAL_8250
+                if (early_serial_setup(&port) != 0)
+                        printk("Early serial init of port %d failed\n", i);
+#endif
+
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(i, &port)
+#endif
 }
 
 void __init
@@ -165,9 +168,4 @@ platform_init(unsigned long r3, unsigned
 #if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
        ppc_md.power_off = xilinx_power_off;
 #endif
-
-#ifdef CONFIG_KGDB
-       ppc_md.early_serial_map = ml300_early_serial_map;
-#endif
 }
-
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/platforms/85xx/sbc8560.c linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/85xx/sbc8560.c
--- linux-2.6.18-53.1.14/arch/ppc/platforms/85xx/sbc8560.c      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/85xx/sbc8560.c 2008-06-10 15:38:14.000000000 +0400
@@ -50,7 +50,6 @@
 #include <syslib/ppc85xx_common.h>
 #include <syslib/ppc85xx_setup.h>
 
-#ifdef CONFIG_SERIAL_8250
 static void __init
 sbc8560_early_serial_map(void)
 {
@@ -66,12 +65,16 @@ sbc8560_early_serial_map(void)
         uart_req.membase = ioremap(uart_req.mapbase, MPC85xx_UART0_SIZE);
        uart_req.type = PORT_16650;
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
-        gen550_init(0, &uart_req);
-#endif
- 
+#ifdef CONFIG_SERIAL_8250
         if (early_serial_setup(&uart_req) != 0)
                 printk("Early serial init of port 0 failed\n");
+#endif
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+       gen550_init(0, &uart_req);
+#endif
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &uart_req);
+#endif
  
         /* Assume early_serial_setup() doesn't modify uart_req */
        uart_req.line = 1;
@@ -79,14 +82,17 @@ sbc8560_early_serial_map(void)
         uart_req.membase = ioremap(uart_req.mapbase, MPC85xx_UART1_SIZE);
        uart_req.irq = MPC85xx_IRQ_EXT10;
  
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
-        gen550_init(1, &uart_req);
-#endif
- 
+#ifdef CONFIG_SERIAL_8250
         if (early_serial_setup(&uart_req) != 0)
-                printk("Early serial init of port 1 failed\n");
-}
+               printk("Early serial init of port 0 failed\n");
 #endif
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+       gen550_init(0, &uart_req);
+#endif
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &uart_req);
+#endif
+}
 
 /* ************************************************************************
  *
@@ -115,9 +121,7 @@ sbc8560_setup_arch(void)
        /* setup PCI host bridges */
        mpc85xx_setup_hose();
 #endif
-#ifdef CONFIG_SERIAL_8250
        sbc8560_early_serial_map();
-#endif
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
        /* Invalidate the entry we stole earlier the serial ports
         * should be properly mapped */ 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/platforms/chestnut.c linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/chestnut.c
--- linux-2.6.18-53.1.14/arch/ppc/platforms/chestnut.c  2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/chestnut.c     2008-06-10 15:38:14.000000000 +0400
@@ -492,7 +492,7 @@ chestnut_power_off(void)
 static void __init
 chestnut_map_io(void)
 {
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB_8250)
        io_block_mapping(CHESTNUT_UART_BASE, CHESTNUT_UART_BASE, 0x100000,
                _PAGE_IO);
 #endif
@@ -566,9 +566,6 @@ platform_init(unsigned long r3, unsigned
 #if defined(CONFIG_SERIAL_TEXT_DEBUG)
        ppc_md.progress = gen550_progress;
 #endif
-#if defined(CONFIG_KGDB)
-       ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
 
        if (ppc_md.progress)
                 ppc_md.progress("chestnut_init(): exit", 0);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/platforms/pplus.c linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/pplus.c
--- linux-2.6.18-53.1.14/arch/ppc/platforms/pplus.c     2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/pplus.c        2008-06-10 15:38:14.000000000 +0400
@@ -893,9 +893,6 @@ platform_init(unsigned long r3, unsigned
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
        ppc_md.progress = gen550_progress;
 #endif                         /* CONFIG_SERIAL_TEXT_DEBUG */
-#ifdef CONFIG_KGDB
-       ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
 #ifdef CONFIG_SMP
        smp_ops = &pplus_smp_ops;
 #endif                         /* CONFIG_SMP */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/platforms/sandpoint.c linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/sandpoint.c
--- linux-2.6.18-53.1.14/arch/ppc/platforms/sandpoint.c 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/sandpoint.c    2008-06-10 15:38:14.000000000 +0400
@@ -730,9 +730,6 @@ platform_init(unsigned long r3, unsigned
        ppc_md.nvram_read_val = todc_mc146818_read_val;
        ppc_md.nvram_write_val = todc_mc146818_write_val;
 
-#ifdef CONFIG_KGDB
-       ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
        ppc_md.progress = gen550_progress;
 #endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/platforms/spruce.c linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/spruce.c
--- linux-2.6.18-53.1.14/arch/ppc/platforms/spruce.c    2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/platforms/spruce.c       2008-06-10 15:38:14.000000000 +0400
@@ -178,26 +178,32 @@ spruce_early_serial_map(void)
        serial_req.membase = (u_char *)UART0_IO_BASE;
        serial_req.regshift = 0;
 
-#if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG)
-       gen550_init(0, &serial_req);
-#endif
 #ifdef CONFIG_SERIAL_8250
        if (early_serial_setup(&serial_req) != 0)
                printk("Early serial init of port 0 failed\n");
 #endif
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+       gen550_init(0, &serial_req);
+#endif
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &port);
+#endif
 
        /* Assume early_serial_setup() doesn't modify serial_req */
        serial_req.line = 1;
        serial_req.irq = UART1_INT;
        serial_req.membase = (u_char *)UART1_IO_BASE;
 
-#if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG)
-       gen550_init(1, &serial_req);
-#endif
 #ifdef CONFIG_SERIAL_8250
        if (early_serial_setup(&serial_req) != 0)
                printk("Early serial init of port 1 failed\n");
 #endif
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+       gen550_init(1, &serial_req);
+#endif
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(1, &serial_req);
+#endif
 }
 
 TODC_ALLOC();
@@ -316,7 +322,4 @@ platform_init(unsigned long r3, unsigned
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
        ppc_md.progress = gen550_progress;
 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
-#ifdef CONFIG_KGDB
-       ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
 }
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/syslib/Makefile linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/Makefile
--- linux-2.6.18-53.1.14/arch/ppc/syslib/Makefile       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/Makefile  2008-06-10 15:38:14.000000000 +0400
@@ -76,7 +76,6 @@ obj-$(CONFIG_PCI_8260)                += m82xx_pci.o p
 obj-$(CONFIG_8260_PCI9)                += m8260_pci_erratum9.o
 obj-$(CONFIG_CPM2)             += cpm2_common.o cpm2_pic.o
 ifeq ($(CONFIG_PPC_GEN550),y)
-obj-$(CONFIG_KGDB)             += gen550_kgdb.o gen550_dbg.o
 obj-$(CONFIG_SERIAL_TEXT_DEBUG)        += gen550_dbg.o
 endif
 ifeq ($(CONFIG_SERIAL_MPSC_CONSOLE),y)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/syslib/gen550.h linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/gen550.h
--- linux-2.6.18-53.1.14/arch/ppc/syslib/gen550.h       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/gen550.h  2008-06-10 15:38:14.000000000 +0400
@@ -11,4 +11,3 @@
 
 extern void gen550_progress(char *, unsigned short);
 extern void gen550_init(int, struct uart_port *);
-extern void gen550_kgdb_map_scc(void);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/syslib/ibm44x_common.c linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/ibm44x_common.c
--- linux-2.6.18-53.1.14/arch/ppc/syslib/ibm44x_common.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/ibm44x_common.c   2008-06-10 15:38:14.000000000 +0400
@@ -192,9 +192,6 @@ void __init ibm44x_platform_init(unsigne
 #ifdef CONFIG_SERIAL_TEXT_DEBUG
        ppc_md.progress = gen550_progress;
 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
-#ifdef CONFIG_KGDB
-       ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
 
        /*
         * The Abatron BDI JTAG debugger does not tolerate others
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/syslib/mv64x60.c linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/mv64x60.c
--- linux-2.6.18-53.1.14/arch/ppc/syslib/mv64x60.c      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/mv64x60.c 2008-06-10 15:38:14.000000000 +0400
@@ -241,6 +241,12 @@ static struct resource mv64x60_mpsc0_res
                .end    = MV64x60_IRQ_SDMA_0,
                .flags  = IORESOURCE_IRQ,
        },
+       [4] = {
+               .name   = "mpsc 0 irq",
+               .start  = MV64x60_IRQ_MPSC_0,
+               .end    = MV64x60_IRQ_MPSC_0,
+               .flags  = IORESOURCE_IRQ,
+       },
 };
 
 static struct platform_device mpsc0_device = {
@@ -298,6 +304,12 @@ static struct resource mv64x60_mpsc1_res
                .end    = MV64360_IRQ_SDMA_1,
                .flags  = IORESOURCE_IRQ,
        },
+       [4] = {
+               .name   = "mpsc 1 irq",
+               .start  = MV64360_IRQ_MPSC_1,
+               .end    = MV64360_IRQ_MPSC_1,
+               .flags  = IORESOURCE_IRQ,
+       },
 };
 
 static struct platform_device mpsc1_device = {
@@ -1426,12 +1438,46 @@ mv64x60_pd_fixup(struct mv64x60_handle *
 static int __init
 mv64x60_add_pds(void)
 {
-       return platform_add_devices(mv64x60_pd_devs,
-               ARRAY_SIZE(mv64x60_pd_devs));
+       int i, ret = 0;
+
+       for (i = 0; i < ARRAY_SIZE(mv64x60_pd_devs); i++) {
+               if (mv64x60_pd_devs[i]) {
+                       ret = platform_device_register(mv64x60_pd_devs[i]);
+               }
+               if (ret) {
+                       while (--i >= 0)
+                               platform_device_unregister(mv64x60_pd_devs[i]);
+                       break;
+               }
+       }
+       return ret;
 }
 arch_initcall(mv64x60_add_pds);
 
 /*
+ * mv64x60_early_get_pdev_data()
+ *
+ * Get the data associated with a platform device by name and number.
+ */
+struct platform_device * __init
+mv64x60_early_get_pdev_data(const char *name, int id, int remove)
+{
+       int i;
+       struct platform_device *pdev;
+
+       for (i = 0; i <ARRAY_SIZE(mv64x60_pd_devs); i++) {
+               if ((pdev = mv64x60_pd_devs[i]) &&
+                       pdev->id == id &&
+                       !strcmp(pdev->name, name)) {
+                       if (remove)
+                               mv64x60_pd_devs[i] = NULL;
+                       return pdev;
+               }
+       }
+       return NULL;
+}
+
+/*
  *****************************************************************************
  *
  *     GT64260-Specific Routines
@@ -1764,6 +1810,11 @@ gt64260a_chip_specific_init(struct mv64x
                r->start = MV64x60_IRQ_SDMA_0;
                r->end = MV64x60_IRQ_SDMA_0;
        }
+       if ((r = platform_get_resource(&mpsc1_device, IORESOURCE_IRQ, 1))
+                       != NULL) {
+               r->start = GT64260_IRQ_MPSC_1;
+               r->end = GT64260_IRQ_MPSC_1;
+       }
 #endif
 }
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/syslib/mv64x60_dbg.c linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/mv64x60_dbg.c
--- linux-2.6.18-53.1.14/arch/ppc/syslib/mv64x60_dbg.c  2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/mv64x60_dbg.c     2008-06-10 15:38:14.000000000 +0400
@@ -34,7 +34,7 @@ static struct mv64x60_handle  mv64x60_dbg
 void
 mv64x60_progress_init(u32 base)
 {
-       mv64x60_dbg_bh.v_base = base;
+       mv64x60_dbg_bh.v_base = (void*)base;
        return;
 }
 
@@ -69,53 +69,3 @@ mv64x60_mpsc_progress(char *s, unsigned 
        return;
 }
 #endif /* CONFIG_SERIAL_TEXT_DEBUG */
-
-
-#if defined(CONFIG_KGDB)
-
-#if defined(CONFIG_KGDB_TTYS0)
-#define KGDB_PORT 0
-#elif defined(CONFIG_KGDB_TTYS1)
-#define KGDB_PORT 1
-#else
-#error "Invalid kgdb_tty port"
-#endif
-
-void
-putDebugChar(unsigned char c)
-{
-       mv64x60_polled_putc(KGDB_PORT, (char)c);
-}
-
-int
-getDebugChar(void)
-{
-       unsigned char   c;
-
-       while (!mv64x60_polled_getc(KGDB_PORT, &c));
-       return (int)c;
-}
-
-void
-putDebugString(char* str)
-{
-       while (*str != '\0') {
-               putDebugChar(*str);
-               str++;
-       }
-       putDebugChar('\r');
-       return;
-}
-
-void
-kgdb_interruptible(int enable)
-{
-}
-
-void
-kgdb_map_scc(void)
-{
-       if (ppc_md.early_serial_map)
-               ppc_md.early_serial_map();
-}
-#endif /* CONFIG_KGDB */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/ppc/syslib/ppc85xx_setup.c linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/ppc85xx_setup.c
--- linux-2.6.18-53.1.14/arch/ppc/syslib/ppc85xx_setup.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/ppc/syslib/ppc85xx_setup.c   2008-06-10 15:38:14.000000000 +0400
@@ -69,7 +69,6 @@ mpc85xx_calibrate_decr(void)
        mtspr(SPRN_TCR, TCR_DIE);
 }
 
-#ifdef CONFIG_SERIAL_8250
 void __init
 mpc85xx_early_serial_map(void)
 {
@@ -85,7 +84,7 @@ mpc85xx_early_serial_map(void)
        pdata[0].mapbase += binfo->bi_immr_base;
        pdata[0].membase = ioremap(pdata[0].mapbase, MPC85xx_UART0_SIZE);
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB_8250)
        memset(&serial_req, 0, sizeof (serial_req));
        serial_req.iotype = UPIO_MEM;
        serial_req.mapbase = pdata[0].mapbase;
@@ -93,18 +92,24 @@ mpc85xx_early_serial_map(void)
        serial_req.regshift = 0;
 
        gen550_init(0, &serial_req);
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(0, &serial_req);
+#endif
 #endif
 
        pdata[1].uartclk = binfo->bi_busfreq;
        pdata[1].mapbase += binfo->bi_immr_base;
        pdata[1].membase = ioremap(pdata[1].mapbase, MPC85xx_UART0_SIZE);
 
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB_8250)
        /* Assume gen550_init() doesn't modify serial_req */
        serial_req.mapbase = pdata[1].mapbase;
        serial_req.membase = pdata[1].membase;
 
        gen550_init(1, &serial_req);
+#ifdef CONFIG_KGDB_8250
+       kgdb8250_add_port(1, &serial_req);
+#endif
 #endif
 }
 #endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/Kconfig.debug linux-2.6.18-53.1.14.kgdb/arch/sh/Kconfig.debug
--- linux-2.6.18-53.1.14/arch/sh/Kconfig.debug  2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/Kconfig.debug     2008-06-10 15:38:50.000000000 +0400
@@ -29,96 +29,4 @@ config EARLY_PRINTK
          This option is only useful porting the kernel to a new machine,
          when the kernel may crash or hang before the serial console is
          initialised. If unsure, say N.
-
-config KGDB
-       bool "Include KGDB kernel debugger"
-       help
-         Include in-kernel hooks for kgdb, the Linux kernel source level
-         debugger.  See <http://kgdb.sourceforge.net/> for more information.
-         Unless you are intending to debug the kernel, say N here.
-
-menu "KGDB configuration options"
-       depends on KGDB
-
-config MORE_COMPILE_OPTIONS
-       bool "Add any additional compile options"
-       help
-         If you want to add additional CFLAGS to the kernel build, enable this
-         option and then enter what you would like to add in the next question.
-         Note however that -g is already appended with the selection of KGDB.
-
-config COMPILE_OPTIONS
-       string "Additional compile arguments"
-       depends on MORE_COMPILE_OPTIONS
-
-config KGDB_NMI
-       bool "Enter KGDB on NMI"
-       default n
-
-config KGDB_THREAD
-       bool "Include KGDB thread support"
-       default y
-
-config SH_KGDB_CONSOLE
-       bool "Console messages through GDB"
-       default n
-
-config KGDB_SYSRQ
-       bool "Allow SysRq 'G' to enter KGDB"
-       default y
-
-config KGDB_KERNEL_ASSERTS
-       bool "Include KGDB kernel assertions"
-       default n
-
-comment "Serial port setup"
-
-config KGDB_DEFPORT
-       int "Port number (ttySCn)"
-       default "1"
-
-config KGDB_DEFBAUD
-       int "Baud rate"
-       default "115200"
-
-choice
-       prompt "Parity"
-       depends on KGDB
-       default KGDB_DEFPARITY_N
-
-config KGDB_DEFPARITY_N
-       bool "None"
-
-config KGDB_DEFPARITY_E
-       bool "Even"
-
-config KGDB_DEFPARITY_O
-       bool "Odd"
-
-endchoice
-
-choice
-       prompt "Data bits"
-       depends on KGDB
-       default KGDB_DEFBITS_8
-
-config KGDB_DEFBITS_8
-       bool "8"
-
-config KGDB_DEFBITS_7
-       bool "7"
-
-endchoice
-
-endmenu
-
-config FRAME_POINTER
-       bool "Compile the kernel with frame pointers"
-       default y if KGDB
-       help
-         If you say Y here the resulting kernel image will be slightly larger
-         and slower, but it will give very useful debugging information.
-         If you don't debug the kernel, you can say N, but we may not be able
-         to solve problems without frame pointers.
-
 endmenu
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/Makefile linux-2.6.18-53.1.14.kgdb/arch/sh/Makefile
--- linux-2.6.18-53.1.14/arch/sh/Makefile       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/Makefile  2008-06-10 15:38:50.000000000 +0400
@@ -43,7 +43,6 @@ cflags-$(CONFIG_CPU_SH4)              += -m4 \
 cflags-$(CONFIG_CPU_SH4A)              += $(call cc-option,-m4a-nofpu,)
 
 cflags-$(CONFIG_SH_DSP)                        += -Wa,-dsp
-cflags-$(CONFIG_SH_KGDB)               += -g
 
 cflags-$(CONFIG_MORE_COMPILE_OPTIONS)  += \
        $(shell echo $(CONFIG_COMPILE_OPTIONS) | sed -e 's/"//g')
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/boards/se/7751/setup.c linux-2.6.18-53.1.14.kgdb/arch/sh/boards/se/7751/setup.c
--- linux-2.6.18-53.1.14/arch/sh/boards/se/7751/setup.c 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/boards/se/7751/setup.c    2008-06-10 15:38:50.000000000 +0400
@@ -17,10 +17,6 @@
 #include <asm/io.h>
 #include <asm/se7751/se7751.h>
 
-#ifdef CONFIG_SH_KGDB
-#include <asm/kgdb.h>
-#endif
-
 /*
  * Configure the Super I/O chip
  */
@@ -82,12 +78,6 @@ const char *get_system_type(void)
        return "7751 SolutionEngine";
 }
 
-#ifdef CONFIG_SH_KGDB
-static int kgdb_uart_setup(void);
-static struct kgdb_sermap kgdb_uart_sermap = 
-{ "ttyS", 0, kgdb_uart_setup, NULL };
-#endif
- 
 /*
  * Initialize the board
  */
@@ -95,133 +85,4 @@ void __init platform_setup(void)
 {
        /* Call init_smsc() replacement to set up SuperIO. */
        /* XXX: RTC setting comes here */
-#ifdef CONFIG_SH_KGDB
-       kgdb_register_sermap(&kgdb_uart_sermap);
-#endif
-}
-
-/*********************************************************************
- * Currently a hack (e.g. does not interact well w/serial.c, lots of *
- * hardcoded stuff) but may be useful if SCI/F needs debugging.      *
- * Mostly copied from x86 code (see files asm-i386/kgdb_local.h and  *
- * arch/i386/lib/kgdb_serial.c).                                     *
- *********************************************************************/
-
-#ifdef CONFIG_SH_KGDB
-#include <linux/types.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/serial_reg.h>
-
-#define COM1_PORT 0x3f8  /* Base I/O address */
-#define COM1_IRQ  4      /* IRQ not used yet */
-#define COM2_PORT 0x2f8  /* Base I/O address */
-#define COM2_IRQ  3      /* IRQ not used yet */
-
-#define SB_CLOCK 1843200 /* Serial baud clock */
-#define SB_BASE (SB_CLOCK/16)
-#define SB_MCR UART_MCR_OUT2 | UART_MCR_DTR | UART_MCR_RTS
-
-struct uart_port {
-       int base;
-};
-#define UART_NPORTS 2
-struct uart_port uart_ports[] = {
-       { COM1_PORT },
-       { COM2_PORT },
-};
-struct uart_port *kgdb_uart_port;
-
-#define UART_IN(reg)   inb_p(kgdb_uart_port->base + reg)
-#define UART_OUT(reg,v)        outb_p((v), kgdb_uart_port->base + reg)
-
-/* Basic read/write functions for the UART */
-#define UART_LSR_RXCERR    (UART_LSR_BI | UART_LSR_FE | UART_LSR_PE)
-static int kgdb_uart_getchar(void)
-{
-       int lsr;
-       int c = -1;
-
-       while (c == -1) {
-               lsr = UART_IN(UART_LSR);
-               if (lsr & UART_LSR_DR) 
-                       c = UART_IN(UART_RX);
-               if ((lsr & UART_LSR_RXCERR))
-                       c = -1;
-       }
-       return c;
-}
-
-static void kgdb_uart_putchar(int c)
-{
-       while ((UART_IN(UART_LSR) & UART_LSR_THRE) == 0)
-               ;
-       UART_OUT(UART_TX, c);
-}
-
-/*
- * Initialize UART to configured/requested values.
- * (But we don't interrupts yet, or interact w/serial.c)
- */
-static int kgdb_uart_setup(void)
-{
-       int port;
-       int lcr = 0;
-       int bdiv = 0;
-
-       if (kgdb_portnum >= UART_NPORTS) {
-               KGDB_PRINTK("uart port %d invalid.\n", kgdb_portnum);
-               return -1;
-       }
-
-       kgdb_uart_port = &uart_ports[kgdb_portnum];
-
-       /* Init sequence from gdb_hook_interrupt */
-       UART_IN(UART_RX);
-       UART_OUT(UART_IER, 0);
-
-       UART_IN(UART_RX);       /* Serial driver comments say */
-       UART_IN(UART_IIR);      /* this clears interrupt regs */
-       UART_IN(UART_MSR);
-
-       /* Figure basic LCR values */
-       switch (kgdb_bits) {
-       case '7':
-               lcr |= UART_LCR_WLEN7;
-               break;
-       default: case '8': 
-               lcr |= UART_LCR_WLEN8;
-               break;
-       }
-       switch (kgdb_parity) {
-       case 'O':
-               lcr |= UART_LCR_PARITY;
-               break;
-       case 'E':
-               lcr |= (UART_LCR_PARITY | UART_LCR_EPAR);
-               break;
-       default: break;
-       }
-
-       /* Figure the baud rate divisor */
-       bdiv = (SB_BASE/kgdb_baud);
-       
-       /* Set the baud rate and LCR values */
-       UART_OUT(UART_LCR, (lcr | UART_LCR_DLAB));
-       UART_OUT(UART_DLL, (bdiv & 0xff));
-       UART_OUT(UART_DLM, ((bdiv >> 8) & 0xff));
-       UART_OUT(UART_LCR, lcr);
-
-       /* Set the MCR */
-       UART_OUT(UART_MCR, SB_MCR);
-
-       /* Turn off FIFOs for now */
-       UART_OUT(UART_FCR, 0);
-
-       /* Setup complete: initialize function pointers */
-       kgdb_getchar = kgdb_uart_getchar;
-       kgdb_putchar = kgdb_uart_putchar;
-
-       return 0;
 }
-#endif /* CONFIG_SH_KGDB */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/Makefile linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/Makefile
--- linux-2.6.18-53.1.14/arch/sh/kernel/Makefile        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/Makefile   2008-06-10 15:38:50.000000000 +0400
@@ -13,7 +13,7 @@ obj-y                         += cpu/ timers/
 obj-$(CONFIG_SMP)              += smp.o
 obj-$(CONFIG_CF_ENABLER)       += cf-enabler.o
 obj-$(CONFIG_SH_STANDARD_BIOS) += sh_bios.o
-obj-$(CONFIG_SH_KGDB)          += kgdb_stub.o kgdb_jmp.o
+obj-$(CONFIG_KGDB)             += kgdb.o kgdb-jmp.o
 obj-$(CONFIG_SH_CPU_FREQ)      += cpufreq.o
 obj-$(CONFIG_MODULES)          += module.o
 obj-$(CONFIG_EARLY_PRINTK)     += early_printk.o
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/cpu/sh3/ex.S linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/cpu/sh3/ex.S
--- linux-2.6.18-53.1.14/arch/sh/kernel/cpu/sh3/ex.S    2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/cpu/sh3/ex.S       2008-06-10 15:38:50.000000000 +0400
@@ -42,7 +42,7 @@ ENTRY(exception_handling_table)
        .long   exception_error ! reserved_instruction (filled by trap_init) /* 180 */
        .long   exception_error ! illegal_slot_instruction (filled by trap_init) /*1A0*/
 ENTRY(nmi_slot)
-#if defined (CONFIG_KGDB_NMI)
+#if defined (CONFIG_KGDB)
        .long   debug_enter     /* 1C0 */       ! Allow trap to debugger
 #else
        .long   exception_none  /* 1C0 */       ! Not implemented yet
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/cpu/sh4/ex.S linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/cpu/sh4/ex.S
--- linux-2.6.18-53.1.14/arch/sh/kernel/cpu/sh4/ex.S    2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/cpu/sh4/ex.S       2008-06-10 15:38:50.000000000 +0400
@@ -46,7 +46,7 @@ ENTRY(exception_handling_table)
        .long   exception_error ! reserved_instruction (filled by trap_init) /* 180 */
        .long   exception_error ! illegal_slot_instruction (filled by trap_init) /*1A0*/
 ENTRY(nmi_slot)
-#if defined (CONFIG_KGDB_NMI)
+#if defined (CONFIG_KGDB)
        .long   debug_enter     /* 1C0 */       ! Allow trap to debugger
 #else
        .long   exception_none  /* 1C0 */       ! Not implemented yet
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/entry.S linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/entry.S
--- linux-2.6.18-53.1.14/arch/sh/kernel/entry.S 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/entry.S    2008-06-10 15:38:50.000000000 +0400
@@ -75,7 +75,7 @@
 ENOSYS = 38
 EINVAL = 22
 
-#if defined(CONFIG_KGDB_NMI)
+#if defined(CONFIG_KGDB)
 NMI_VEC = 0x1c0                        ! Must catch early for debounce
 #endif
 
@@ -227,31 +227,33 @@ call_dae:
 2:     .long   do_address_error
 #endif /* CONFIG_MMU */
 
-#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB)
+#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_KGDB)
 ! Handle kernel debug if either kgdb (SW) or gdb-stub (FW) is present.
 ! If both are configured, handle the debug traps (breakpoints) in SW,
 ! but still allow BIOS traps to FW.
 
        .align  2
 debug_kernel:
-#if defined(CONFIG_SH_STANDARD_BIOS) && defined(CONFIG_SH_KGDB)
+#if defined(CONFIG_SH_STANDARD_BIOS) && defined(CONFIG_KGDB)
        /* Force BIOS call to FW (debug_trap put TRA in r8) */
        mov     r8,r0
        shlr2   r0
        cmp/eq  #0x3f,r0
        bt      debug_kernel_fw
-#endif /* CONFIG_SH_STANDARD_BIOS && CONFIG_SH_KGDB */
+#endif /* CONFIG_SH_STANDARD_BIOS && CONFIG_KGDB */
 
+       .align 2
+       .globl debug_enter
 debug_enter:           
-#if defined(CONFIG_SH_KGDB)
+#if defined(CONFIG_KGDB)
        /* Jump to kgdb, pass stacked regs as arg */
 debug_kernel_sw:
        mov.l   3f, r0
        jmp     @r0
         mov    r15, r4
        .align  2
-3:     .long   kgdb_handle_exception
-#endif /* CONFIG_SH_KGDB */
+3:     .long   kgdb_exception_handler
+#endif /* CONFIG_KGDB */
 
 #if defined(CONFIG_SH_STANDARD_BIOS)
        /* Unwind the stack and jmp to the debug entry */
@@ -293,12 +295,12 @@ debug_kernel_fw:
 2:     .long   gdb_vbr_vector
 #endif /* CONFIG_SH_STANDARD_BIOS */
 
-#endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */
+#endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_KGDB */
 
 
        .align  2
 debug_trap:    
-#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB)
+#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_KGDB)
        mov     #OFF_SR, r0
        mov.l   @(r0,r15), r0           ! get status register
        shll    r0
@@ -642,7 +644,7 @@ skip_restore:
 6:     or      k0, k2                  ! Set the IMASK-bits
        ldc     k2, ssr
        !
-#if defined(CONFIG_KGDB_NMI)
+#if defined(CONFIG_KGDB)
        ! Clear in_nmi
        mov.l   4f, k0
        mov     #0, k1
@@ -694,7 +696,7 @@ tlb_miss:
 interrupt:
        mov.l   2f, k2
        mov.l   3f, k3
-#if defined(CONFIG_KGDB_NMI)
+#if defined(CONFIG_KGDB)
        ! Debounce (filter nested NMI)
        mov.l   @k2, k0
        mov.l   5f, k1
@@ -709,7 +711,7 @@ interrupt:
 5:     .long   NMI_VEC
 6:     .long   in_nmi
 0:
-#endif /* defined(CONFIG_KGDB_NMI) */
+#endif /* defined(CONFIG_KGDB) */
        bra     handle_exception
         mov.l  @k2, k2
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/kgdb-jmp.S linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/kgdb-jmp.S
--- linux-2.6.18-53.1.14/arch/sh/kernel/kgdb-jmp.S      1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/kgdb-jmp.S 2008-06-10 15:38:50.000000000 +0400
@@ -0,0 +1,32 @@
+#include <linux/linkage.h>
+
+ENTRY(kgdb_fault_setjmp)
+       add     #(9*4), r4
+       sts.l   pr, @-r4
+       mov.l   r15, @-r4
+       mov.l   r14, @-r4
+       mov.l   r13, @-r4
+       mov.l   r12, @-r4
+       mov.l   r11, @-r4
+       mov.l   r10, @-r4
+       mov.l   r9, @-r4
+       mov.l   r8, @-r4
+       rts
+        mov    #0, r0
+
+ENTRY(kgdb_fault_longjmp)
+       mov.l   @r4+, r8
+       mov.l   @r4+, r9
+       mov.l   @r4+, r10
+       mov.l   @r4+, r11
+       mov.l   @r4+, r12
+       mov.l   @r4+, r13
+       mov.l   @r4+, r14
+       mov.l   @r4+, r15
+       lds.l   @r4+, pr
+       mov     r5, r0
+       tst     r0, r0
+       bf      1f
+       mov     #1, r0
+1:     rts
+        nop
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/kgdb.c linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/kgdb.c
--- linux-2.6.18-53.1.14/arch/sh/kernel/kgdb.c  1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/kgdb.c     2008-06-10 15:38:50.000000000 +0400
@@ -0,0 +1,363 @@
+/*
+ * arch/sh/kernel/kgdb.c
+ *
+ * Contains SH-specific low-level support for KGDB.
+ *
+ * Containes extracts from code by Glenn Engel, Jim Kingdon,
+ * David Grothe <dave@gcom.com>, Tigran Aivazian <tigran@sco.com>,
+ * Amit S. Kale <akale@veritas.com>,  William Gatliff <bgat@open-widgets.com>,
+ * Ben Lee, Steve Chamberlain and Benoit Miller <fulg@iname.com>,
+ * Henry Bell <henry.bell@st.com> and Jeremy Siegel <jsiegel@mvista.com>
+ *
+ * Maintainer: Tom Rini <trini@kernel.crashing.org>
+ *
+ * 2004 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <linux/kgdb.h>
+
+#include <asm/system.h>
+#include <asm/current.h>
+#include <asm/signal.h>
+#include <asm/pgtable.h>
+#include <asm/ptrace.h>
+
+extern void per_cpu_trap_init(void);
+extern atomic_t cpu_doing_single_step;
+
+/* Function pointers for linkage */
+static struct kgdb_regs trap_registers;
+
+/* Globals. */
+char in_nmi;                   /* Set during NMI to prevent reentry */
+
+/* TRA differs sh3/4 */
+#if defined(CONFIG_CPU_SH3)
+#define TRA 0xffffffd0
+#elif defined(CONFIG_CPU_SH4)
+#define TRA 0xff000020
+#endif
+
+/* Macros for single step instruction identification */
+#define OPCODE_BT(op)         (((op) & 0xff00) == 0x8900)
+#define OPCODE_BF(op)         (((op) & 0xff00) == 0x8b00)
+#define OPCODE_BTF_DISP(op)   (((op) & 0x80) ? (((op) | 0xffffff80) << 1) : \
+                             (((op) & 0x7f ) << 1))
+#define OPCODE_BFS(op)        (((op) & 0xff00) == 0x8f00)
+#define OPCODE_BTS(op)        (((op) & 0xff00) == 0x8d00)
+#define OPCODE_BRA(op)        (((op) & 0xf000) == 0xa000)
+#define OPCODE_BRA_DISP(op)   (((op) & 0x800) ? (((op) | 0xfffff800) << 1) : \
+                             (((op) & 0x7ff) << 1))
+#define OPCODE_BRAF(op)       (((op) & 0xf0ff) == 0x0023)
+#define OPCODE_BRAF_REG(op)   (((op) & 0x0f00) >> 8)
+#define OPCODE_BSR(op)        (((op) & 0xf000) == 0xb000)
+#define OPCODE_BSR_DISP(op)   (((op) & 0x800) ? (((op) | 0xfffff800) << 1) : \
+                             (((op) & 0x7ff) << 1))
+#define OPCODE_BSRF(op)       (((op) & 0xf0ff) == 0x0003)
+#define OPCODE_BSRF_REG(op)   (((op) >> 8) & 0xf)
+#define OPCODE_JMP(op)        (((op) & 0xf0ff) == 0x402b)
+#define OPCODE_JMP_REG(op)    (((op) >> 8) & 0xf)
+#define OPCODE_JSR(op)        (((op) & 0xf0ff) == 0x400b)
+#define OPCODE_JSR_REG(op)    (((op) >> 8) & 0xf)
+#define OPCODE_RTS(op)        ((op) == 0xb)
+#define OPCODE_RTE(op)        ((op) == 0x2b)
+
+#define SR_T_BIT_MASK           0x1
+#define STEP_OPCODE             0xc320
+#define BIOS_CALL_TRAP          0x3f
+
+/* Exception codes as per SH-4 core manual */
+#define ADDRESS_ERROR_LOAD_VEC   7
+#define ADDRESS_ERROR_STORE_VEC  8
+#define TRAP_VEC                 11
+#define INVALID_INSN_VEC         12
+#define INVALID_SLOT_VEC         13
+#define NMI_VEC                  14
+#define SERIAL_BREAK_VEC         58
+
+/* Misc static */
+static int stepped_address;
+static short stepped_opcode;
+
+/* Translate SH-3/4 exception numbers to unix-like signal values */
+static int compute_signal(const int excep_code)
+{
+       switch (excep_code) {
+       case INVALID_INSN_VEC:
+       case INVALID_SLOT_VEC:
+               return SIGILL;
+       case ADDRESS_ERROR_LOAD_VEC:
+       case ADDRESS_ERROR_STORE_VEC:
+               return SIGSEGV;
+       case SERIAL_BREAK_VEC:
+       case NMI_VEC:
+               return SIGINT;
+       default:
+               /* Act like it was a break/trap. */
+               return SIGTRAP;
+       }
+}
+
+/*
+ * Translate the registers of the system into the format that GDB wants.  Since
+ * we use a local structure to store things, instead of getting them out
+ * of pt_regs, we can just do a memcpy.
+ */
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *ign)
+{
+       memcpy(gdb_regs, &trap_registers, sizeof(trap_registers));
+}
+
+/*
+ * On SH we save: r1 (prev->thread.sp) r2 (prev->thread.pc) r4 (prev) r5 (next)
+ * r6 (next->thread.sp) r7 (next->thread.pc)
+ */
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+       int count;
+
+       for (count = 0; count < 16; count++)
+               *(gdb_regs++) = 0;
+       *(gdb_regs++) = p->thread.pc;
+       *(gdb_regs++) = 0;
+       *(gdb_regs++) = 0;
+       *(gdb_regs++) = 0;
+       *(gdb_regs++) = 0;
+       *(gdb_regs++) = 0;
+       *(gdb_regs++) = 0;
+}
+
+/*
+ * Translate the registers values that GDB has given us back into the
+ * format of the system.  See the comment above about memcpy.
+ */
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *ign)
+{
+       memcpy(&trap_registers, gdb_regs, sizeof(trap_registers));
+}
+
+/* Calculate the new address for after a step */
+static short *get_step_address(void)
+{
+       short op = *(short *)trap_registers.pc;
+       long addr;
+
+       /* BT */
+       if (OPCODE_BT(op)) {
+               if (trap_registers.sr & SR_T_BIT_MASK)
+                       addr = trap_registers.pc + 4 + OPCODE_BTF_DISP(op);
+               else
+                       addr = trap_registers.pc + 2;
+       }
+
+       /* BTS */
+       else if (OPCODE_BTS(op)) {
+               if (trap_registers.sr & SR_T_BIT_MASK)
+                       addr = trap_registers.pc + 4 + OPCODE_BTF_DISP(op);
+               else
+                       addr = trap_registers.pc + 4;   /* Not in delay slot */
+       }
+
+       /* BF */
+       else if (OPCODE_BF(op)) {
+               if (!(trap_registers.sr & SR_T_BIT_MASK))
+                       addr = trap_registers.pc + 4 + OPCODE_BTF_DISP(op);
+               else
+                       addr = trap_registers.pc + 2;
+       }
+
+       /* BFS */
+       else if (OPCODE_BFS(op)) {
+               if (!(trap_registers.sr & SR_T_BIT_MASK))
+                       addr = trap_registers.pc + 4 + OPCODE_BTF_DISP(op);
+               else
+                       addr = trap_registers.pc + 4;   /* Not in delay slot */
+       }
+
+       /* BRA */
+       else if (OPCODE_BRA(op))
+               addr = trap_registers.pc + 4 + OPCODE_BRA_DISP(op);
+
+       /* BRAF */
+       else if (OPCODE_BRAF(op))
+               addr = trap_registers.pc + 4
+                   + trap_registers.regs[OPCODE_BRAF_REG(op)];
+
+       /* BSR */
+       else if (OPCODE_BSR(op))
+               addr = trap_registers.pc + 4 + OPCODE_BSR_DISP(op);
+
+       /* BSRF */
+       else if (OPCODE_BSRF(op))
+               addr = trap_registers.pc + 4
+                   + trap_registers.regs[OPCODE_BSRF_REG(op)];
+
+       /* JMP */
+       else if (OPCODE_JMP(op))
+               addr = trap_registers.regs[OPCODE_JMP_REG(op)];
+
+       /* JSR */
+       else if (OPCODE_JSR(op))
+               addr = trap_registers.regs[OPCODE_JSR_REG(op)];
+
+       /* RTS */
+       else if (OPCODE_RTS(op))
+               addr = trap_registers.pr;
+
+       /* RTE */
+       else if (OPCODE_RTE(op))
+               addr = trap_registers.regs[15];
+
+       /* Other */
+       else
+               addr = trap_registers.pc + 2;
+
+       kgdb_flush_icache_range(addr, addr + 2);
+       return (short *)addr;
+}
+
+/* The command loop, read and act on requests */
+int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
+                              char *remcom_in_buffer, char *remcom_out_buffer,
+                              struct pt_regs *ign)
+{
+       unsigned long addr;
+       char *ptr = &remcom_in_buffer[1];
+
+       /* Examine first char of buffer to see what we need to do */
+       switch (remcom_in_buffer[0]) {
+       case 'c':               /* Continue at address AA..AA (optional) */
+       case 's':               /* Step one instruction from AA..AA */
+               /* Try to read optional parameter, PC unchanged if none */
+               if (kgdb_hex2long(&ptr, &addr))
+                       trap_registers.pc = addr;
+
+               atomic_set(&cpu_doing_single_step, -1);
+               if (remcom_in_buffer[0] == 's') {
+                       /* Replace the instruction immediately after the
+                        * current instruction (i.e. next in the expected
+                        * flow of control) with a trap instruction, so that
+                        * returning will cause only a single instruction to
+                        * be executed. Note that this model is slightly
+                        * broken for instructions with delay slots
+                        * (e.g. B[TF]S, BSR, BRA etc), where both the branch
+                        * and the instruction in the delay slot will be
+                        * executed.
+                        */
+                       /* Determine where the target instruction will send
+                        * us to */
+                       unsigned short *next_addr = get_step_address();
+                       stepped_address = (int)next_addr;
+
+                       /* Replace it */
+                       stepped_opcode = *(short *)next_addr;
+                       *next_addr = STEP_OPCODE;
+
+                       /* Flush and return */
+                       kgdb_flush_icache_range((long)next_addr,
+                                               (long)next_addr + 2);
+                       if (kgdb_contthread)
+                               atomic_set(&cpu_doing_single_step,
+                                          smp_processor_id());
+               }
+               return 0;
+       }
+       return -1;
+}
+
+/*
+ * When an exception has occured, we are called.  We need to set things
+ * up so that we can call kgdb_handle_exception to handle requests from
+ * the remote GDB.
+ */
+void kgdb_exception_handler(struct pt_regs *regs)
+{
+       int excep_code, vbr_val;
+       int count;
+
+       /* Copy kernel regs (from stack) */
+       for (count = 0; count < 16; count++)
+               trap_registers.regs[count] = regs->regs[count];
+       trap_registers.pc = regs->pc;
+       trap_registers.pr = regs->pr;
+       trap_registers.sr = regs->sr;
+       trap_registers.gbr = regs->gbr;
+       trap_registers.mach = regs->mach;
+       trap_registers.macl = regs->macl;
+
+       __asm__ __volatile__("stc vbr, %0":"=r"(vbr_val));
+       trap_registers.vbr = vbr_val;
+
+       /* Get the execption code. */
+       __asm__ __volatile__("stc r2_bank, %0":"=r"(excep_code));
+
+       excep_code >>= 5;
+
+       /* If we got an NMI, and KGDB is not yet initialized, call
+        * breakpoint() to try and initialize everything for us. */
+       if (excep_code == NMI_VEC && !kgdb_initialized) {
+               breakpoint();
+               return;
+       }
+
+       /* TRAP_VEC exception indicates a software trap inserted in place of
+        * code by GDB so back up PC by one instruction, as this instruction
+        * will later be replaced by its original one.  Do NOT do this for
+        * trap 0xff, since that indicates a compiled-in breakpoint which
+        * will not be replaced (and we would retake the trap forever) */
+       if (excep_code == TRAP_VEC &&
+           (*(volatile unsigned long *)TRA != (0xff << 2)))
+               trap_registers.pc -= 2;
+
+       /* If we have been single-stepping, put back the old instruction.
+        * We use stepped_address in case we have stopped more than one
+        * instruction away. */
+       if (stepped_opcode != 0) {
+               *(short *)stepped_address = stepped_opcode;
+               kgdb_flush_icache_range(stepped_address, stepped_address + 2);
+       }
+       stepped_opcode = 0;
+
+       /* Call the stub to do the processing.  Note that not everything we
+        * need to send back and forth lives in pt_regs. */
+       kgdb_handle_exception(excep_code, compute_signal(excep_code), 0, regs);
+
+       /* Copy back the (maybe modified) registers */
+       for (count = 0; count < 16; count++)
+               regs->regs[count] = trap_registers.regs[count];
+       regs->pc = trap_registers.pc;
+       regs->pr = trap_registers.pr;
+       regs->sr = trap_registers.sr;
+       regs->gbr = trap_registers.gbr;
+       regs->mach = trap_registers.mach;
+       regs->macl = trap_registers.macl;
+
+       vbr_val = trap_registers.vbr;
+       __asm__ __volatile__("ldc %0, vbr": :"r"(vbr_val));
+}
+
+int __init kgdb_arch_init(void)
+{
+       per_cpu_trap_init();
+
+       return 0;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+       .gdb_bpt_instr = {0xff, 0xc3},
+#else
+       .gdb_bpt_instr = {0xc3, 0xff},
+#endif
+};
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/kgdb_jmp.S linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/kgdb_jmp.S
--- linux-2.6.18-53.1.14/arch/sh/kernel/kgdb_jmp.S      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/kgdb_jmp.S 1970-01-01 03:00:00.000000000 +0300
@@ -1,33 +0,0 @@
-#include <linux/linkage.h>
-
-ENTRY(setjmp)
-       add     #(9*4), r4
-       sts.l   pr, @-r4
-       mov.l   r15, @-r4
-       mov.l   r14, @-r4
-       mov.l   r13, @-r4
-       mov.l   r12, @-r4
-       mov.l   r11, @-r4
-       mov.l   r10, @-r4
-       mov.l   r9, @-r4
-       mov.l   r8, @-r4
-       rts
-        mov    #0, r0
-
-ENTRY(longjmp)
-       mov.l   @r4+, r8
-       mov.l   @r4+, r9
-       mov.l   @r4+, r10
-       mov.l   @r4+, r11
-       mov.l   @r4+, r12
-       mov.l   @r4+, r13
-       mov.l   @r4+, r14
-       mov.l   @r4+, r15
-       lds.l   @r4+, pr
-       mov     r5, r0
-       tst     r0, r0
-       bf      1f
-       mov     #1, r0  ! in case val==0
-1:     rts
-        nop
-
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/kgdb_stub.c linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/kgdb_stub.c
--- linux-2.6.18-53.1.14/arch/sh/kernel/kgdb_stub.c     2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/kgdb_stub.c        1970-01-01 03:00:00.000000000 +0300
@@ -1,1491 +0,0 @@
-/*
- * May be copied or modified under the terms of the GNU General Public
- * License.  See linux/COPYING for more information.
- *
- * Containes extracts from code by Glenn Engel, Jim Kingdon,
- * David Grothe <dave@gcom.com>, Tigran Aivazian <tigran@sco.com>,
- * Amit S. Kale <akale@veritas.com>,  William Gatliff <bgat@open-widgets.com>,
- * Ben Lee, Steve Chamberlain and Benoit Miller <fulg@iname.com>.
- * 
- * This version by Henry Bell <henry.bell@st.com>
- * Minor modifications by Jeremy Siegel <jsiegel@mvista.com>
- * 
- * Contains low-level support for remote debug using GDB. 
- *
- * To enable debugger support, two things need to happen. A call to
- * set_debug_traps() is necessary in order to allow any breakpoints
- * or error conditions to be properly intercepted and reported to gdb.
- * A breakpoint also needs to be generated to begin communication.  This
- * is most easily accomplished by a call to breakpoint() which does
- * a trapa if the initialisation phase has been successfully completed.
- *
- * In this case, set_debug_traps() is not used to "take over" exceptions;
- * other kernel code is modified instead to enter the kgdb functions here
- * when appropriate (see entry.S for breakpoint traps and NMI interrupts,
- * see traps.c for kernel error exceptions).
- *
- * The following gdb commands are supported:
- *
- *    Command       Function                               Return value
- *
- *    g             return the value of the CPU registers  hex data or ENN
- *    G             set the value of the CPU registers     OK or ENN
- *
- *    mAA..AA,LLLL  Read LLLL bytes at address AA..AA      hex data or ENN
- *    MAA..AA,LLLL: Write LLLL bytes at address AA.AA      OK or ENN
- *    XAA..AA,LLLL: Same, but data is binary (not hex)     OK or ENN
- *
- *    c             Resume at current address              SNN   ( signal NN)
- *    cAA..AA       Continue at address AA..AA             SNN
- *    CNN;          Resume at current address with signal  SNN
- *    CNN;AA..AA    Resume at address AA..AA with signal   SNN
- *
- *    s             Step one instruction                   SNN
- *    sAA..AA       Step one instruction from AA..AA       SNN
- *    SNN;          Step one instruction with signal       SNN
- *    SNNAA..AA     Step one instruction from AA..AA w/NN  SNN
- *
- *    k             kill (Detach GDB)
- *
- *    d             Toggle debug flag
- *    D             Detach GDB 
- *
- *    Hct           Set thread t for operations,           OK or ENN
- *                  c = 'c' (step, cont), c = 'g' (other
- *                  operations)
- *
- *    qC            Query current thread ID                QCpid
- *    qfThreadInfo  Get list of current threads (first)    m<id>
- *    qsThreadInfo   "    "  "     "      "   (subsequent)
- *    qOffsets      Get section offsets                  Text=x;Data=y;Bss=z
- * 
- *    TXX           Find if thread XX is alive             OK or ENN
- *    ?             What was the last sigval ?             SNN   (signal NN)
- *    O             Output to GDB console
- *
- * Remote communication protocol.
- *
- *    A debug packet whose contents are <data> is encapsulated for
- *    transmission in the form:
- *
- *       $ <data> # CSUM1 CSUM2
- *
- *       <data> must be ASCII alphanumeric and cannot include characters
- *       '$' or '#'.  If <data> starts with two characters followed by
- *       ':', then the existing stubs interpret this as a sequence number.
- *
- *       CSUM1 and CSUM2 are ascii hex representation of an 8-bit 
- *       checksum of <data>, the most significant nibble is sent first.
- *       the hex digits 0-9,a-f are used.
- *
- *    Receiver responds with:
- *
- *       +       - if CSUM is correct and ready for next packet
- *       -       - if CSUM is incorrect
- *
- * Responses can be run-length encoded to save space.  A '*' means that
- * the next character is an ASCII encoding giving a repeat count which
- * stands for that many repititions of the character preceding the '*'.
- * The encoding is n+29, yielding a printable character where n >=3 
- * (which is where RLE starts to win).  Don't use an n > 126. 
- *
- * So "0* " means the same as "0000".
- */
-
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/spinlock.h>
-#include <linux/delay.h>
-#include <linux/linkage.h>
-#include <linux/init.h>
-
-#include <asm/system.h>
-#include <asm/current.h>
-#include <asm/signal.h>
-#include <asm/pgtable.h>
-#include <asm/ptrace.h>
-#include <asm/kgdb.h>
-
-#ifdef CONFIG_SH_KGDB_CONSOLE
-#include <linux/console.h>
-#endif
-
-/* Function pointers for linkage */
-kgdb_debug_hook_t *kgdb_debug_hook;
-kgdb_bus_error_hook_t *kgdb_bus_err_hook;
-
-int (*kgdb_getchar)(void);
-void (*kgdb_putchar)(int);
-
-static void put_debug_char(int c)
-{
-       if (!kgdb_putchar)
-               return;
-       (*kgdb_putchar)(c);
-}
-static int get_debug_char(void)
-{
-       if (!kgdb_getchar)
-               return -1;
-       return (*kgdb_getchar)();
-}
-
-/* Num chars in in/out bound buffers, register packets need NUMREGBYTES * 2 */
-#define BUFMAX 1024
-#define NUMREGBYTES (MAXREG*4)
-#define OUTBUFMAX (NUMREGBYTES*2+512)
-
-enum regs {
-       R0 = 0, R1,  R2,  R3,   R4,   R5,  R6, R7,
-       R8, R9, R10, R11, R12,  R13,  R14, R15,
-       PC, PR, GBR, VBR, MACH, MACL, SR,
-       /*  */
-       MAXREG
-};
-
-static unsigned int registers[MAXREG];
-struct kgdb_regs trap_registers;
-
-char kgdb_in_gdb_mode;
-char in_nmi;                   /* Set during NMI to prevent reentry */
-int kgdb_nofault;              /* Boolean to ignore bus errs (i.e. in GDB) */
-int kgdb_enabled = 1;          /* Default to enabled, cmdline can disable */
-int kgdb_halt;
-
-/* Exposed for user access */
-struct task_struct *kgdb_current;
-unsigned int kgdb_g_imask;
-int kgdb_trapa_val;
-int kgdb_excode;
-
-/* Default values for SCI (can override via kernel args in setup.c) */
-#ifndef CONFIG_KGDB_DEFPORT
-#define CONFIG_KGDB_DEFPORT 1
-#endif
-
-#ifndef CONFIG_KGDB_DEFBAUD
-#define CONFIG_KGDB_DEFBAUD 115200
-#endif
-
-#if defined(CONFIG_KGDB_DEFPARITY_E)
-#define CONFIG_KGDB_DEFPARITY 'E'
-#elif defined(CONFIG_KGDB_DEFPARITY_O)
-#define CONFIG_KGDB_DEFPARITY 'O'
-#else /* CONFIG_KGDB_DEFPARITY_N */
-#define CONFIG_KGDB_DEFPARITY 'N'
-#endif
-
-#ifdef CONFIG_KGDB_DEFBITS_7
-#define CONFIG_KGDB_DEFBITS '7'
-#else /* CONFIG_KGDB_DEFBITS_8 */
-#define CONFIG_KGDB_DEFBITS '8'
-#endif
-
-/* SCI/UART settings, used in kgdb_console_setup() */
-int  kgdb_portnum = CONFIG_KGDB_DEFPORT;
-int  kgdb_baud = CONFIG_KGDB_DEFBAUD;
-char kgdb_parity = CONFIG_KGDB_DEFPARITY;
-char kgdb_bits = CONFIG_KGDB_DEFBITS;
-
-/* Jump buffer for setjmp/longjmp */
-static jmp_buf rem_com_env;
-
-/* TRA differs sh3/4 */
-#if defined(CONFIG_CPU_SH3)
-#define TRA 0xffffffd0
-#elif defined(CONFIG_CPU_SH4)
-#define TRA 0xff000020
-#endif
-
-/* Macros for single step instruction identification */
-#define OPCODE_BT(op)         (((op) & 0xff00) == 0x8900)
-#define OPCODE_BF(op)         (((op) & 0xff00) == 0x8b00)
-#define OPCODE_BTF_DISP(op)   (((op) & 0x80) ? (((op) | 0xffffff80) << 1) : \
-                             (((op) & 0x7f ) << 1))
-#define OPCODE_BFS(op)        (((op) & 0xff00) == 0x8f00)
-#define OPCODE_BTS(op)        (((op) & 0xff00) == 0x8d00)
-#define OPCODE_BRA(op)        (((op) & 0xf000) == 0xa000)
-#define OPCODE_BRA_DISP(op)   (((op) & 0x800) ? (((op) | 0xfffff800) << 1) : \
-                             (((op) & 0x7ff) << 1))
-#define OPCODE_BRAF(op)       (((op) & 0xf0ff) == 0x0023)
-#define OPCODE_BRAF_REG(op)   (((op) & 0x0f00) >> 8)
-#define OPCODE_BSR(op)        (((op) & 0xf000) == 0xb000)
-#define OPCODE_BSR_DISP(op)   (((op) & 0x800) ? (((op) | 0xfffff800) << 1) : \
-                             (((op) & 0x7ff) << 1))
-#define OPCODE_BSRF(op)       (((op) & 0xf0ff) == 0x0003)
-#define OPCODE_BSRF_REG(op)   (((op) >> 8) & 0xf)
-#define OPCODE_JMP(op)        (((op) & 0xf0ff) == 0x402b)
-#define OPCODE_JMP_REG(op)    (((op) >> 8) & 0xf)
-#define OPCODE_JSR(op)        (((op) & 0xf0ff) == 0x400b)
-#define OPCODE_JSR_REG(op)    (((op) >> 8) & 0xf)
-#define OPCODE_RTS(op)        ((op) == 0xb)
-#define OPCODE_RTE(op)        ((op) == 0x2b)
-
-#define SR_T_BIT_MASK           0x1
-#define STEP_OPCODE             0xc320
-#define BIOS_CALL_TRAP          0x3f
-
-/* Exception codes as per SH-4 core manual */
-#define ADDRESS_ERROR_LOAD_VEC   7
-#define ADDRESS_ERROR_STORE_VEC  8
-#define TRAP_VEC                 11
-#define INVALID_INSN_VEC         12
-#define INVALID_SLOT_VEC         13
-#define NMI_VEC                  14
-#define USER_BREAK_VEC           15
-#define SERIAL_BREAK_VEC         58
-
-/* Misc static */
-static int stepped_address;
-static short stepped_opcode;
-static const char hexchars[] = "0123456789abcdef";
-static char in_buffer[BUFMAX];
-static char out_buffer[OUTBUFMAX];
-
-static void kgdb_to_gdb(const char *s);
-
-#ifdef CONFIG_KGDB_THREAD
-static struct task_struct *trapped_thread;
-static struct task_struct *current_thread;
-typedef unsigned char threadref[8];
-#define BUF_THREAD_ID_SIZE 16
-#endif
-
-/* Return addr as a real volatile address */
-static inline unsigned int ctrl_inl(const unsigned long addr)
-{
-       return *(volatile unsigned long *) addr;
-}
-
-/* Correctly set *addr using volatile */
-static inline void ctrl_outl(const unsigned int b, unsigned long addr)
-{
-       *(volatile unsigned long *) addr = b;
-}
-
-/* Get high hex bits */
-static char highhex(const int x)
-{
-       return hexchars[(x >> 4) & 0xf];
-}
-
-/* Get low hex bits */
-static char lowhex(const int x)
-{
-       return hexchars[x & 0xf];
-}
-
-/* Convert ch to hex */
-static int hex(const char ch)
-{
-       if ((ch >= 'a') && (ch <= 'f'))
-               return (ch - 'a' + 10);
-       if ((ch >= '0') && (ch <= '9'))
-               return (ch - '0');
-       if ((ch >= 'A') && (ch <= 'F'))
-               return (ch - 'A' + 10);
-       return (-1);
-}
-
-/* Convert the memory pointed to by mem into hex, placing result in buf.
-   Returns a pointer to the last char put in buf (null) */
-static char *mem_to_hex(const char *mem, char *buf, const int count)
-{
-       int i;
-       int ch;
-       unsigned short s_val;
-       unsigned long l_val;
-
-       /* Check for 16 or 32 */
-       if (count == 2 && ((long) mem & 1) == 0) {
-               s_val = *(unsigned short *) mem;
-               mem = (char *) &s_val;
-       } else if (count == 4 && ((long) mem & 3) == 0) {
-               l_val = *(unsigned long *) mem;
-               mem = (char *) &l_val;
-       }
-       for (i = 0; i < count; i++) {
-               ch = *mem++;
-               *buf++ = highhex(ch);
-               *buf++ = lowhex(ch);
-       }
-       *buf = 0;
-       return (buf);
-}
-
-/* Convert the hex array pointed to by buf into binary, to be placed in mem.
-   Return a pointer to the character after the last byte written */
-static char *hex_to_mem(const char *buf, char *mem, const int count)
-{
-       int i;
-       unsigned char ch;
-
-       for (i = 0; i < count; i++) {
-               ch = hex(*buf++) << 4;
-               ch = ch + hex(*buf++);
-               *mem++ = ch;
-       }
-       return (mem);
-}
-
-/* While finding valid hex chars, convert to an integer, then return it */
-static int hex_to_int(char **ptr, int *int_value)
-{
-       int num_chars = 0;
-       int hex_value;
-
-       *int_value = 0;
-
-       while (**ptr) {
-               hex_value = hex(**ptr);
-               if (hex_value >= 0) {
-                       *int_value = (*int_value << 4) | hex_value;
-                       num_chars++;
-               } else
-                       break;
-               (*ptr)++;
-       }
-       return num_chars;
-}
-
-/*  Copy the binary array pointed to by buf into mem.  Fix $, #,
-    and 0x7d escaped with 0x7d.  Return a pointer to the character 
-    after the last byte written. */
-static char *ebin_to_mem(const char *buf, char *mem, int count)
-{
-       for (; count > 0; count--, buf++) {
-               if (*buf == 0x7d)
-                       *mem++ = *(++buf) ^ 0x20;
-               else
-                       *mem++ = *buf;
-       }
-       return mem;
-}
-
-/* Pack a hex byte */
-static char *pack_hex_byte(char *pkt, int byte)
-{
-       *pkt++ = hexchars[(byte >> 4) & 0xf];
-       *pkt++ = hexchars[(byte & 0xf)];
-       return pkt;
-}
-
-#ifdef CONFIG_KGDB_THREAD
-
-/* Pack a thread ID */
-static char *pack_threadid(char *pkt, threadref * id)
-{
-       char *limit;
-       unsigned char *altid;
-
-       altid = (unsigned char *) id;
-
-       limit = pkt + BUF_THREAD_ID_SIZE;
-       while (pkt < limit)
-               pkt = pack_hex_byte(pkt, *altid++);
-       return pkt;
-}
-
-/* Convert an integer into our threadref */
-static void int_to_threadref(threadref * id, const int value)
-{
-       unsigned char *scan = (unsigned char *) id;
-       int i = 4;
-
-       while (i--)
-               *scan++ = 0;
-
-       *scan++ = (value >> 24) & 0xff;
-       *scan++ = (value >> 16) & 0xff;
-       *scan++ = (value >> 8) & 0xff;
-       *scan++ = (value & 0xff);
-}
-
-/* Return a task structure ptr for a particular pid */
-static struct task_struct *get_thread(int pid)
-{
-       struct task_struct *thread;
-
-       /* Use PID_MAX w/gdb for pid 0 */
-       if (pid == PID_MAX) pid = 0;
-
-       /* First check via PID */
-       thread = find_task_by_pid(pid);
-
-       if (thread)
-               return thread;
-
-       /* Start at the start */
-       thread = init_tasks[0];
-
-       /* Walk along the linked list of tasks */
-       do {
-               if (thread->pid == pid)
-                       return thread;
-               thread = thread->next_task;
-       } while (thread != init_tasks[0]);
-
-       return NULL;
-}
-
-#endif /* CONFIG_KGDB_THREAD */
-
-/* Scan for the start char '$', read the packet and check the checksum */
-static void get_packet(char *buffer, int buflen)
-{
-       unsigned char checksum;
-       unsigned char xmitcsum;
-       int i;
-       int count;
-       char ch;
-
-       do {
-               /* Ignore everything until the start character */
-               while ((ch = get_debug_char()) != '$');
-
-               checksum = 0;
-               xmitcsum = -1;
-               count = 0;
-
-               /* Now, read until a # or end of buffer is found */
-               while (count < (buflen - 1)) {
-                       ch = get_debug_char();
-
-                       if (ch == '#')
-                               break;
-
-                       checksum = checksum + ch;
-                       buffer[count] = ch;
-                       count = count + 1;
-               }
-
-               buffer[count] = 0;
-
-               /* Continue to read checksum following # */
-               if (ch == '#') {
-                       xmitcsum = hex(get_debug_char()) << 4;
-                       xmitcsum += hex(get_debug_char());
-
-                       /* Checksum */
-                       if (checksum != xmitcsum)
-                               put_debug_char('-');    /* Failed checksum */
-                       else {
-                               /* Ack successful transfer */
-                               put_debug_char('+');
-
-                               /* If a sequence char is present, reply 
-                                  the sequence ID */
-                               if (buffer[2] == ':') {
-                                       put_debug_char(buffer[0]);
-                                       put_debug_char(buffer[1]);
-
-                                       /* Remove sequence chars from buffer */
-                                       count = strlen(buffer);
-                                       for (i = 3; i <= count; i++)
-                                               buffer[i - 3] = buffer[i];
-                               }
-                       }
-               }
-       }
-       while (checksum != xmitcsum);   /* Keep trying while we fail */
-}
-
-/* Send the packet in the buffer with run-length encoding */
-static void put_packet(char *buffer)
-{
-       int checksum;
-       char *src;
-       int runlen;
-       int encode;
-
-       do {
-               src = buffer;
-               put_debug_char('$');
-               checksum = 0;
-
-               /* Continue while we still have chars left */
-               while (*src) {
-                       /* Check for runs up to 99 chars long */
-                       for (runlen = 1; runlen < 99; runlen++) {
-                               if (src[0] != src[runlen])
-                                       break;
-                       }
-
-                       if (runlen > 3) {
-                               /* Got a useful amount, send encoding */
-                               encode = runlen + ' ' - 4;
-                               put_debug_char(*src);   checksum += *src;
-                               put_debug_char('*');    checksum += '*';
-                               put_debug_char(encode); checksum += encode;
-                               src += runlen;
-                       } else {
-                               /* Otherwise just send the current char */
-                               put_debug_char(*src);   checksum += *src;
-                               src += 1;
-                       }
-               }
-
-               /* '#' Separator, put high and low components of checksum */
-               put_debug_char('#');
-               put_debug_char(highhex(checksum));
-               put_debug_char(lowhex(checksum));
-       }
-       while ((get_debug_char()) != '+');      /* While no ack */
-}
-
-/* A bus error has occurred - perform a longjmp to return execution and
-   allow handling of the error */
-static void kgdb_handle_bus_error(void)
-{
-       longjmp(rem_com_env, 1);
-}
-
-/* Translate SH-3/4 exception numbers to unix-like signal values */
-static int compute_signal(const int excep_code)
-{
-       int sigval;
-
-       switch (excep_code) {
-
-       case INVALID_INSN_VEC:
-       case INVALID_SLOT_VEC:
-               sigval = SIGILL;
-               break;
-       case ADDRESS_ERROR_LOAD_VEC:
-       case ADDRESS_ERROR_STORE_VEC:
-               sigval = SIGSEGV;
-               break;
-
-       case SERIAL_BREAK_VEC:
-       case NMI_VEC:
-               sigval = SIGINT;
-               break;
-
-       case USER_BREAK_VEC:
-       case TRAP_VEC:
-               sigval = SIGTRAP;
-               break;
-
-       default:
-               sigval = SIGBUS;        /* "software generated" */
-               break;
-       }
-
-       return (sigval);
-}
-
-/* Make a local copy of the registers passed into the handler (bletch) */
-static void kgdb_regs_to_gdb_regs(const struct kgdb_regs *regs,
-                                 int *gdb_regs)
-{
-       gdb_regs[R0] = regs->regs[R0];
-       gdb_regs[R1] = regs->regs[R1];
-       gdb_regs[R2] = regs->regs[R2];
-       gdb_regs[R3] = regs->regs[R3];
-       gdb_regs[R4] = regs->regs[R4];
-       gdb_regs[R5] = regs->regs[R5];
-       gdb_regs[R6] = regs->regs[R6];
-       gdb_regs[R7] = regs->regs[R7];
-       gdb_regs[R8] = regs->regs[R8];
-       gdb_regs[R9] = regs->regs[R9];
-       gdb_regs[R10] = regs->regs[R10];
-       gdb_regs[R11] = regs->regs[R11];
-       gdb_regs[R12] = regs->regs[R12];
-       gdb_regs[R13] = regs->regs[R13];
-       gdb_regs[R14] = regs->regs[R14];
-       gdb_regs[R15] = regs->regs[R15];
-       gdb_regs[PC] = regs->pc;
-       gdb_regs[PR] = regs->pr;
-       gdb_regs[GBR] = regs->gbr;
-       gdb_regs[MACH] = regs->mach;
-       gdb_regs[MACL] = regs->macl;
-       gdb_regs[SR] = regs->sr;
-       gdb_regs[VBR] = regs->vbr;
-}
-
-/* Copy local gdb registers back to kgdb regs, for later copy to kernel */
-static void gdb_regs_to_kgdb_regs(const int *gdb_regs,
-                                 struct kgdb_regs *regs)
-{
-       regs->regs[R0] = gdb_regs[R0];
-       regs->regs[R1] = gdb_regs[R1];
-       regs->regs[R2] = gdb_regs[R2];
-       regs->regs[R3] = gdb_regs[R3];
-       regs->regs[R4] = gdb_regs[R4];
-       regs->regs[R5] = gdb_regs[R5];
-       regs->regs[R6] = gdb_regs[R6];
-       regs->regs[R7] = gdb_regs[R7];
-       regs->regs[R8] = gdb_regs[R8];
-       regs->regs[R9] = gdb_regs[R9];
-       regs->regs[R10] = gdb_regs[R10];
-       regs->regs[R11] = gdb_regs[R11];
-       regs->regs[R12] = gdb_regs[R12];
-       regs->regs[R13] = gdb_regs[R13];
-       regs->regs[R14] = gdb_regs[R14];
-       regs->regs[R15] = gdb_regs[R15];
-       regs->pc = gdb_regs[PC];
-       regs->pr = gdb_regs[PR];
-       regs->gbr = gdb_regs[GBR];
-       regs->mach = gdb_regs[MACH];
-       regs->macl = gdb_regs[MACL];
-       regs->sr = gdb_regs[SR];
-       regs->vbr = gdb_regs[VBR];
-}
-
-#ifdef CONFIG_KGDB_THREAD
-/* Make a local copy of registers from the specified thread */
-asmlinkage void ret_from_fork(void);
-static void thread_regs_to_gdb_regs(const struct task_struct *thread,
-                                   int *gdb_regs)
-{
-       int regno;
-       int *tregs;
-
-       /* Initialize to zero */
-       for (regno = 0; regno < MAXREG; regno++)
-               gdb_regs[regno] = 0;
-
-       /* Just making sure... */
-       if (thread == NULL)
-               return;
-
-       /* A new fork has pt_regs on the stack from a fork() call */
-       if (thread->thread.pc == (unsigned long)ret_from_fork) {
-
-               int vbr_val;
-               struct pt_regs *kregs;
-               kregs = (struct pt_regs*)thread->thread.sp;
-
-               gdb_regs[R0] = kregs->regs[R0];
-               gdb_regs[R1] = kregs->regs[R1];
-               gdb_regs[R2] = kregs->regs[R2];
-               gdb_regs[R3] = kregs->regs[R3];
-               gdb_regs[R4] = kregs->regs[R4];
-               gdb_regs[R5] = kregs->regs[R5];
-               gdb_regs[R6] = kregs->regs[R6];
-               gdb_regs[R7] = kregs->regs[R7];
-               gdb_regs[R8] = kregs->regs[R8];
-               gdb_regs[R9] = kregs->regs[R9];
-               gdb_regs[R10] = kregs->regs[R10];
-               gdb_regs[R11] = kregs->regs[R11];
-               gdb_regs[R12] = kregs->regs[R12];
-               gdb_regs[R13] = kregs->regs[R13];
-               gdb_regs[R14] = kregs->regs[R14];
-               gdb_regs[R15] = kregs->regs[R15];
-               gdb_regs[PC] = kregs->pc;
-               gdb_regs[PR] = kregs->pr;
-               gdb_regs[GBR] = kregs->gbr;
-               gdb_regs[MACH] = kregs->mach;
-               gdb_regs[MACL] = kregs->macl;
-               gdb_regs[SR] = kregs->sr;
-
-               asm("stc vbr, %0":"=r"(vbr_val));
-               gdb_regs[VBR] = vbr_val;
-               return;
-       }
-
-       /* Otherwise, we have only some registers from switch_to() */
-       tregs = (int *)thread->thread.sp;
-       gdb_regs[R15] = (int)tregs;
-       gdb_regs[R14] = *tregs++;
-       gdb_regs[R13] = *tregs++;
-       gdb_regs[R12] = *tregs++;
-       gdb_regs[R11] = *tregs++;
-       gdb_regs[R10] = *tregs++;
-       gdb_regs[R9] = *tregs++;
-       gdb_regs[R8] = *tregs++;
-       gdb_regs[PR] = *tregs++;
-       gdb_regs[GBR] = *tregs++;
-       gdb_regs[PC] = thread->thread.pc;
-}
-#endif /* CONFIG_KGDB_THREAD */
-
-/* Calculate the new address for after a step */
-static short *get_step_address(void)
-{
-       short op = *(short *) trap_registers.pc;
-       long addr;
-
-       /* BT */
-       if (OPCODE_BT(op)) {
-               if (trap_registers.sr & SR_T_BIT_MASK)
-                       addr = trap_registers.pc + 4 + OPCODE_BTF_DISP(op);
-               else
-                       addr = trap_registers.pc + 2;
-       }
-
-       /* BTS */
-       else if (OPCODE_BTS(op)) {
-               if (trap_registers.sr & SR_T_BIT_MASK)
-                       addr = trap_registers.pc + 4 + OPCODE_BTF_DISP(op);
-               else
-                       addr = trap_registers.pc + 4;   /* Not in delay slot */
-       }
-
-       /* BF */
-       else if (OPCODE_BF(op)) {
-               if (!(trap_registers.sr & SR_T_BIT_MASK))
-                       addr = trap_registers.pc + 4 + OPCODE_BTF_DISP(op);
-               else
-                       addr = trap_registers.pc + 2;
-       }
-
-       /* BFS */
-       else if (OPCODE_BFS(op)) {
-               if (!(trap_registers.sr & SR_T_BIT_MASK))
-                       addr = trap_registers.pc + 4 + OPCODE_BTF_DISP(op);
-               else
-                       addr = trap_registers.pc + 4;   /* Not in delay slot */
-       }
-
-       /* BRA */
-       else if (OPCODE_BRA(op))
-               addr = trap_registers.pc + 4 + OPCODE_BRA_DISP(op);
-
-       /* BRAF */
-       else if (OPCODE_BRAF(op))
-               addr = trap_registers.pc + 4
-                   + trap_registers.regs[OPCODE_BRAF_REG(op)];
-
-       /* BSR */
-       else if (OPCODE_BSR(op))
-               addr = trap_registers.pc + 4 + OPCODE_BSR_DISP(op);
-
-       /* BSRF */
-       else if (OPCODE_BSRF(op))
-               addr = trap_registers.pc + 4
-                   + trap_registers.regs[OPCODE_BSRF_REG(op)];
-
-       /* JMP */
-       else if (OPCODE_JMP(op))
-               addr = trap_registers.regs[OPCODE_JMP_REG(op)];
-
-       /* JSR */
-       else if (OPCODE_JSR(op))
-               addr = trap_registers.regs[OPCODE_JSR_REG(op)];
-
-       /* RTS */
-       else if (OPCODE_RTS(op))
-               addr = trap_registers.pr;
-
-       /* RTE */
-       else if (OPCODE_RTE(op))
-               addr = trap_registers.regs[15];
-
-       /* Other */
-       else
-               addr = trap_registers.pc + 2;
-
-       kgdb_flush_icache_range(addr, addr + 2);
-       return (short *) addr;
-}
-
-/* Set up a single-step.  Replace the instruction immediately after the 
-   current instruction (i.e. next in the expected flow of control) with a
-   trap instruction, so that returning will cause only a single instruction
-   to be executed. Note that this model is slightly broken for instructions
-   with delay slots (e.g. B[TF]S, BSR, BRA etc), where both the branch
-   and the instruction in the delay slot will be executed. */
-static void do_single_step(void)
-{
-       unsigned short *addr = 0;
-
-       /* Determine where the target instruction will send us to */
-       addr = get_step_address();
-       stepped_address = (int)addr;
-
-       /* Replace it */
-       stepped_opcode = *(short *)addr;
-       *addr = STEP_OPCODE;
-
-       /* Flush and return */
-       kgdb_flush_icache_range((long) addr, (long) addr + 2);
-       return;
-}
-
-/* Undo a single step */
-static void undo_single_step(void)
-{
-       /* If we have stepped, put back the old instruction */
-       /* Use stepped_address in case we stopped elsewhere */
-       if (stepped_opcode != 0) {
-               *(short*)stepped_address = stepped_opcode;
-               kgdb_flush_icache_range(stepped_address, stepped_address + 2);
-       }
-       stepped_opcode = 0;
-}
-
-/* Send a signal message */
-static void send_signal_msg(const int signum)
-{
-#ifndef CONFIG_KGDB_THREAD
-       out_buffer[0] = 'S';
-       out_buffer[1] = highhex(signum);
-       out_buffer[2] = lowhex(signum);
-       out_buffer[3] = 0;
-       put_packet(out_buffer);
-#else /* CONFIG_KGDB_THREAD */
-       int threadid;
-       threadref thref;
-       char *out = out_buffer;
-       const char *tstring = "thread";
-
-       *out++ = 'T';
-       *out++ = highhex(signum);
-       *out++ = lowhex(signum);
-
-       while (*tstring) {
-               *out++ = *tstring++;
-       }
-       *out++ = ':';
-
-       threadid = trapped_thread->pid;
-       if (threadid == 0) threadid = PID_MAX;
-       int_to_threadref(&thref, threadid);
-       pack_threadid(out, &thref);
-       out += BUF_THREAD_ID_SIZE;
-       *out++ = ';';
-
-       *out = 0;
-       put_packet(out_buffer);
-#endif /* CONFIG_KGDB_THREAD */
-}
-
-/* Reply that all was well */
-static void send_ok_msg(void)
-{
-       strcpy(out_buffer, "OK");
-       put_packet(out_buffer);
-}
-
-/* Reply that an error occurred */
-static void send_err_msg(void)
-{
-       strcpy(out_buffer, "E01");
-       put_packet(out_buffer);
-}
-
-/* Empty message indicates unrecognised command */
-static void send_empty_msg(void)
-{
-       put_packet("");
-}
-
-/* Read memory due to 'm' message */
-static void read_mem_msg(void)
-{
-       char *ptr;
-       int addr;
-       int length;
-
-       /* Jmp, disable bus error handler */
-       if (setjmp(rem_com_env) == 0) {
-
-               kgdb_nofault = 1;
-
-               /* Walk through, have m<addr>,<length> */
-               ptr = &in_buffer[1];
-               if (hex_to_int(&ptr, &addr) && (*ptr++ == ','))
-                       if (hex_to_int(&ptr, &length)) {
-                               ptr = 0;
-                               if (length * 2 > OUTBUFMAX)
-                                       length = OUTBUFMAX / 2;
-                               mem_to_hex((char *) addr, out_buffer, length);
-                       }
-               if (ptr)
-                       send_err_msg();
-               else
-                       put_packet(out_buffer);
-       } else
-               send_err_msg();
-
-       /* Restore bus error handler */
-       kgdb_nofault = 0;
-}
-
-/* Write memory due to 'M' or 'X' message */
-static void write_mem_msg(int binary)
-{
-       char *ptr;
-       int addr;
-       int length;
-
-       if (setjmp(rem_com_env) == 0) {
-
-               kgdb_nofault = 1;
-
-               /* Walk through, have M<addr>,<length>:<data> */
-               ptr = &in_buffer[1];
-               if (hex_to_int(&ptr, &addr) && (*ptr++ == ','))
-                       if (hex_to_int(&ptr, &length) && (*ptr++ == ':')) {
-                               if (binary)
-                                       ebin_to_mem(ptr, (char*)addr, length);
-                               else
-                                       hex_to_mem(ptr, (char*)addr, length);
-                               kgdb_flush_icache_range(addr, addr + length);
-                               ptr = 0;
-                               send_ok_msg();
-                       }
-               if (ptr)
-                       send_err_msg();
-       } else
-               send_err_msg();
-
-       /* Restore bus error handler */
-       kgdb_nofault = 0;
-}
-
-/* Continue message  */
-static void continue_msg(void)
-{
-       /* Try to read optional parameter, PC unchanged if none */
-       char *ptr = &in_buffer[1];
-       int addr;
-
-       if (hex_to_int(&ptr, &addr))
-               trap_registers.pc = addr;
-}
-
-/* Continue message with signal */
-static void continue_with_sig_msg(void)
-{
-       int signal;
-       char *ptr = &in_buffer[1];
-       int addr;
-
-       /* Report limitation */
-       kgdb_to_gdb("Cannot force signal in kgdb, continuing anyway.\n");
-
-       /* Signal */
-       hex_to_int(&ptr, &signal);
-       if (*ptr == ';')
-               ptr++;
-
-       /* Optional address */
-       if (hex_to_int(&ptr, &addr))
-               trap_registers.pc = addr;
-}
-
-/* Step message */
-static void step_msg(void)
-{
-       continue_msg();
-       do_single_step();
-}
-
-/* Step message with signal */
-static void step_with_sig_msg(void)
-{
-       continue_with_sig_msg();
-       do_single_step();
-}
-
-/* Send register contents */
-static void send_regs_msg(void)
-{
-#ifdef CONFIG_KGDB_THREAD
-       if (!current_thread)
-               kgdb_regs_to_gdb_regs(&trap_registers, registers);
-       else
-               thread_regs_to_gdb_regs(current_thread, registers);
-#else
-       kgdb_regs_to_gdb_regs(&trap_registers, registers);
-#endif
-
-       mem_to_hex((char *) registers, out_buffer, NUMREGBYTES);
-       put_packet(out_buffer);
-}
-
-/* Set register contents - currently can't set other thread's registers */
-static void set_regs_msg(void)
-{
-#ifdef CONFIG_KGDB_THREAD
-       if (!current_thread) {
-#endif
-               kgdb_regs_to_gdb_regs(&trap_registers, registers);
-               hex_to_mem(&in_buffer[1], (char *) registers, NUMREGBYTES);
-               gdb_regs_to_kgdb_regs(registers, &trap_registers);
-               send_ok_msg();
-#ifdef CONFIG_KGDB_THREAD
-       } else
-               send_err_msg();
-#endif
-}
-
-
-#ifdef CONFIG_KGDB_THREAD
-
-/* Set the status for a thread */
-void set_thread_msg(void)
-{
-       int threadid;
-       struct task_struct *thread = NULL;
-       char *ptr;
-
-       switch (in_buffer[1]) {
-
-               /* To select which thread for gG etc messages, i.e. supported */
-       case 'g':
-
-               ptr = &in_buffer[2];
-               hex_to_int(&ptr, &threadid);
-               thread = get_thread(threadid);
-
-               /* If we haven't found it */
-               if (!thread) {
-                       send_err_msg();
-                       break;
-               }
-
-               /* Set current_thread (or not) */
-               if (thread == trapped_thread)
-                       current_thread = NULL;
-               else
-                       current_thread = thread;
-               send_ok_msg();
-               break;
-
-       /* To select which thread for cCsS messages, i.e. unsupported */
-       case 'c':
-               send_ok_msg();
-               break;
-
-       default:
-               send_empty_msg();
-               break;
-       }
-}
-
-/* Is a thread alive? */
-static void thread_status_msg(void)
-{
-       char *ptr;
-       int threadid;
-       struct task_struct *thread = NULL;
-
-       ptr = &in_buffer[1];
-       hex_to_int(&ptr, &threadid);
-       thread = get_thread(threadid);
-       if (thread)
-               send_ok_msg();
-       else
-               send_err_msg();
-}
-/* Send the current thread ID */
-static void thread_id_msg(void)
-{
-       int threadid;
-       threadref thref;
-
-       out_buffer[0] = 'Q';
-       out_buffer[1] = 'C';
-
-       if (current_thread)
-               threadid = current_thread->pid;
-       else if (trapped_thread)
-               threadid = trapped_thread->pid;
-       else /* Impossible, but just in case! */
-       {
-               send_err_msg();
-               return;
-       }
-
-       /* Translate pid 0 to PID_MAX for gdb */
-       if (threadid == 0) threadid = PID_MAX;
-
-       int_to_threadref(&thref, threadid);
-       pack_threadid(out_buffer + 2, &thref);
-       out_buffer[2 + BUF_THREAD_ID_SIZE] = '\0';
-       put_packet(out_buffer);
-}
-
-/* Send thread info */
-static void thread_info_msg(void)
-{
-       struct task_struct *thread = NULL;
-       int threadid;
-       char *pos;
-       threadref thref;
-
-       /* Start with 'm' */
-       out_buffer[0] = 'm';
-       pos = &out_buffer[1];
-
-       /* For all possible thread IDs - this will overrun if > 44 threads! */
-       /* Start at 1 and include PID_MAX (since GDB won't use pid 0...) */
-       for (threadid = 1; threadid <= PID_MAX; threadid++) {
-
-               read_lock(&tasklist_lock);
-               thread = get_thread(threadid);
-               read_unlock(&tasklist_lock);
-
-               /* If it's a valid thread */
-               if (thread) {
-                       int_to_threadref(&thref, threadid);
-                       pack_threadid(pos, &thref);
-                       pos += BUF_THREAD_ID_SIZE;
-                       *pos++ = ',';
-               }
-       }
-       *--pos = 0;             /* Lose final comma */
-       put_packet(out_buffer);
-
-}
-
-/* Return printable info for gdb's 'info threads' command */
-static void thread_extra_info_msg(void)
-{
-       int threadid;
-       struct task_struct *thread = NULL;
-       char buffer[20], *ptr;
-       int i;
-
-       /* Extract thread ID */
-       ptr = &in_buffer[17];
-       hex_to_int(&ptr, &threadid);
-       thread = get_thread(threadid);
-
-       /* If we don't recognise it, say so */
-       if (thread == NULL)
-               strcpy(buffer, "(unknown)");
-       else
-               strcpy(buffer, thread->comm);
-
-       /* Construct packet */
-       for (i = 0, ptr = out_buffer; buffer[i]; i++)
-               ptr = pack_hex_byte(ptr, buffer[i]);
-
-       if (thread->thread.pc == (unsigned long)ret_from_fork) {
-               strcpy(buffer, "<new fork>");
-               for (i = 0; buffer[i]; i++)
-                       ptr = pack_hex_byte(ptr, buffer[i]);
-       }
-
-       *ptr = '\0';
-       put_packet(out_buffer);
-}
-
-/* Handle all qFooBarBaz messages - have to use an if statement as
-   opposed to a switch because q messages can have > 1 char id. */
-static void query_msg(void)
-{
-       const char *q_start = &in_buffer[1];
-
-       /* qC = return current thread ID */
-       if (strncmp(q_start, "C", 1) == 0)
-               thread_id_msg();
-
-       /* qfThreadInfo = query all threads (first) */
-       else if (strncmp(q_start, "fThreadInfo", 11) == 0)
-               thread_info_msg();
-
-       /* qsThreadInfo = query all threads (subsequent). We know we have sent
-          them all after the qfThreadInfo message, so there are no to send */
-       else if (strncmp(q_start, "sThreadInfo", 11) == 0)
-               put_packet("l");        /* el = last */
-
-       /* qThreadExtraInfo = supply printable information per thread */
-       else if (strncmp(q_start, "ThreadExtraInfo", 15) == 0)
-               thread_extra_info_msg();
-
-       /* Unsupported - empty message as per spec */
-       else
-               send_empty_msg();
-}
-#endif /* CONFIG_KGDB_THREAD */
-
-/*
- * Bring up the ports..
- */
-static int kgdb_serial_setup(void)
-{
-       extern int kgdb_console_setup(struct console *co, char *options);
-       struct console dummy;
-
-       kgdb_console_setup(&dummy, 0);
-
-       return 0;
-}
-
-/* The command loop, read and act on requests */
-static void kgdb_command_loop(const int excep_code, const int trapa_value)
-{
-       int sigval;
-
-       if (excep_code == NMI_VEC) {
-#ifndef CONFIG_KGDB_NMI
-               KGDB_PRINTK("Ignoring unexpected NMI?\n");
-               return;
-#else /* CONFIG_KGDB_NMI */
-               if (!kgdb_enabled) {
-                       kgdb_enabled = 1;
-                       kgdb_init();
-               }
-#endif /* CONFIG_KGDB_NMI */
-       }
-
-       /* Ignore if we're disabled */
-       if (!kgdb_enabled)
-               return;
-
-#ifdef CONFIG_KGDB_THREAD
-       /* Until GDB specifies a thread */
-       current_thread = NULL;
-       trapped_thread = current;
-#endif
-
-       /* Enter GDB mode (e.g. after detach) */
-       if (!kgdb_in_gdb_mode) {
-               /* Do serial setup, notify user, issue preemptive ack */
-               kgdb_serial_setup();
-               KGDB_PRINTK("Waiting for GDB (on %s%d at %d baud)\n",
-                           (kgdb_porttype ? kgdb_porttype->name : ""),
-                           kgdb_portnum, kgdb_baud);
-               kgdb_in_gdb_mode = 1;
-               put_debug_char('+');
-       }
-
-       /* Reply to host that an exception has occurred */
-       sigval = compute_signal(excep_code);
-       send_signal_msg(sigval);
-
-       /* TRAP_VEC exception indicates a software trap inserted in place of
-          code by GDB so back up PC by one instruction, as this instruction
-          will later be replaced by its original one.  Do NOT do this for
-          trap 0xff, since that indicates a compiled-in breakpoint which
-          will not be replaced (and we would retake the trap forever) */
-       if ((excep_code == TRAP_VEC) && (trapa_value != (0xff << 2))) {
-               trap_registers.pc -= 2;
-       }
-
-       /* Undo any stepping we may have done */
-       undo_single_step();
-
-       while (1) {
-
-               out_buffer[0] = 0;
-               get_packet(in_buffer, BUFMAX);
-
-               /* Examine first char of buffer to see what we need to do */
-               switch (in_buffer[0]) {
-
-               case '?':       /* Send which signal we've received */
-                       send_signal_msg(sigval);
-                       break;
-
-               case 'g':       /* Return the values of the CPU registers */
-                       send_regs_msg();
-                       break;
-
-               case 'G':       /* Set the value of the CPU registers */
-                       set_regs_msg();
-                       break;
-
-               case 'm':       /* Read LLLL bytes address AA..AA */
-                       read_mem_msg();
-                       break;
-
-               case 'M':       /* Write LLLL bytes address AA..AA, ret OK */
-                       write_mem_msg(0);       /* 0 = data in hex */
-                       break;
-
-               case 'X':       /* Write LLLL bytes esc bin address AA..AA */
-                       if (kgdb_bits == '8')
-                               write_mem_msg(1); /* 1 = data in binary */
-                       else
-                               send_empty_msg();
-                       break;
-
-               case 'C':       /* Continue, signum included, we ignore it */
-                       continue_with_sig_msg();
-                       return;
-
-               case 'c':       /* Continue at address AA..AA (optional) */
-                       continue_msg();
-                       return;
-
-               case 'S':       /* Step, signum included, we ignore it */
-                       step_with_sig_msg();
-                       return;
-
-               case 's':       /* Step one instruction from AA..AA */
-                       step_msg();
-                       return;
-
-#ifdef CONFIG_KGDB_THREAD
-
-               case 'H':       /* Task related */
-                       set_thread_msg();
-                       break;
-
-               case 'T':       /* Query thread status */
-                       thread_status_msg();
-                       break;
-
-               case 'q':       /* Handle query - currently thread-related */
-                       query_msg();
-                       break;
-#endif
-
-               case 'k':       /* 'Kill the program' with a kernel ? */
-                       break;
-
-               case 'D':       /* Detach from program, send reply OK */
-                       kgdb_in_gdb_mode = 0;
-                       send_ok_msg();
-                       get_debug_char();
-                       return;
-
-               default:
-                       send_empty_msg();
-                       break;
-               }
-       }
-}
-
-/* There has been an exception, most likely a breakpoint. */
-void kgdb_handle_exception(struct pt_regs *regs)
-{
-       int excep_code, vbr_val;
-       int count;
-       int trapa_value = ctrl_inl(TRA);
-
-       /* Copy kernel regs (from stack) */
-       for (count = 0; count < 16; count++)
-               trap_registers.regs[count] = regs->regs[count];
-       trap_registers.pc = regs->pc;
-       trap_registers.pr = regs->pr;
-       trap_registers.sr = regs->sr;
-       trap_registers.gbr = regs->gbr;
-       trap_registers.mach = regs->mach;
-       trap_registers.macl = regs->macl;
-
-       asm("stc vbr, %0":"=r"(vbr_val));
-       trap_registers.vbr = vbr_val;
-
-       /* Get excode for command loop call, user access */
-       asm("stc r2_bank, %0":"=r"(excep_code));
-       kgdb_excode = excep_code;
-
-       /* Other interesting environment items for reference */
-       asm("stc r6_bank, %0":"=r"(kgdb_g_imask));
-       kgdb_current = current;
-       kgdb_trapa_val = trapa_value;
-
-       /* Act on the exception */
-       kgdb_command_loop(excep_code >> 5, trapa_value);
-
-       kgdb_current = NULL;
-
-       /* Copy back the (maybe modified) registers */
-       for (count = 0; count < 16; count++)
-               regs->regs[count] = trap_registers.regs[count];
-       regs->pc = trap_registers.pc;
-       regs->pr = trap_registers.pr;
-       regs->sr = trap_registers.sr;
-       regs->gbr = trap_registers.gbr;
-       regs->mach = trap_registers.mach;
-       regs->macl = trap_registers.macl;
-
-       vbr_val = trap_registers.vbr;
-       asm("ldc %0, vbr": :"r"(vbr_val));
-
-       return;
-}
-
-/* Trigger a breakpoint by function */
-void breakpoint(void)
-{
-       if (!kgdb_enabled) {
-               kgdb_enabled = 1;
-               kgdb_init();
-       }
-       BREAKPOINT();
-}
-
-/* Initialise the KGDB data structures and serial configuration */
-int kgdb_init(void)
-{
-       if (!kgdb_enabled)
-               return 1;
-
-       in_nmi = 0;
-       kgdb_nofault = 0;
-       stepped_opcode = 0;
-       kgdb_in_gdb_mode = 0;
-
-       if (kgdb_serial_setup() != 0) {
-               KGDB_PRINTK("serial setup error\n");
-               return -1;
-       }
-
-       /* Init ptr to exception handler */
-       kgdb_debug_hook = kgdb_handle_exception;
-       kgdb_bus_err_hook = kgdb_handle_bus_error;
-
-       /* Enter kgdb now if requested, or just report init done */
-       if (kgdb_halt) {
-               kgdb_in_gdb_mode = 1;
-               put_debug_char('+');
-               breakpoint();
-       }
-       else
-       {
-               KGDB_PRINTK("stub is initialized.\n");
-       }
-
-       return 0;
-}
-
-/* Make function available for "user messages"; console will use it too. */
-
-char gdbmsgbuf[BUFMAX];
-#define MAXOUT ((BUFMAX-2)/2)
-
-static void kgdb_msg_write(const char *s, unsigned count)
-{
-       int i;
-       int wcount;
-       char *bufptr;
-
-       /* 'O'utput */
-       gdbmsgbuf[0] = 'O';
-
-       /* Fill and send buffers... */
-       while (count > 0) {
-               bufptr = gdbmsgbuf + 1;
-
-               /* Calculate how many this time */
-               wcount = (count > MAXOUT) ? MAXOUT : count;
-               
-               /* Pack in hex chars */
-               for (i = 0; i < wcount; i++)
-                       bufptr = pack_hex_byte(bufptr, s[i]);
-               *bufptr = '\0';
-
-               /* Move up */
-               s += wcount;
-               count -= wcount;
-
-               /* Write packet */
-               put_packet(gdbmsgbuf);
-       }
-}
-
-static void kgdb_to_gdb(const char *s)
-{
-       kgdb_msg_write(s, strlen(s));
-}
-
-#ifdef CONFIG_SH_KGDB_CONSOLE
-void kgdb_console_write(struct console *co, const char *s, unsigned count)
-{
-       /* Bail if we're not talking to GDB */
-       if (!kgdb_in_gdb_mode)
-               return;
-
-       kgdb_msg_write(s, count);
-}
-#endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/setup.c linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/setup.c
--- linux-2.6.18-53.1.14/arch/sh/kernel/setup.c 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/setup.c    2008-06-10 15:38:50.000000000 +0400
@@ -28,10 +28,6 @@
 #include <asm/setup.h>
 #include <asm/clock.h>
 
-#ifdef CONFIG_SH_KGDB
-#include <asm/kgdb.h>
-static int kgdb_parse_options(char *options);
-#endif
 extern void * __rd_start, * __rd_end;
 /*
  * Machine setup..
@@ -528,93 +524,3 @@ struct seq_operations cpuinfo_op = {
        .show   = show_cpuinfo,
 };
 #endif /* CONFIG_PROC_FS */
-
-#ifdef CONFIG_SH_KGDB
-/*
- * Parse command-line kgdb options.  By default KGDB is enabled,
- * entered on error (or other action) using default serial info.
- * The command-line option can include a serial port specification
- * and an action to override default or configured behavior.
- */
-struct kgdb_sermap kgdb_sci_sermap =
-{ "ttySC", 5, kgdb_sci_setup, NULL };
-
-struct kgdb_sermap *kgdb_serlist = &kgdb_sci_sermap;
-struct kgdb_sermap *kgdb_porttype = &kgdb_sci_sermap;
-
-void kgdb_register_sermap(struct kgdb_sermap *map)
-{
-       struct kgdb_sermap *last;
-
-       for (last = kgdb_serlist; last->next; last = last->next)
-               ;
-       last->next = map;
-       if (!map->namelen) {
-               map->namelen = strlen(map->name);
-       }
-}
-
-static int __init kgdb_parse_options(char *options)
-{
-       char c;
-       int baud;
-
-       /* Check for port spec (or use default) */
-
-       /* Determine port type and instance */
-       if (!memcmp(options, "tty", 3)) {
-               struct kgdb_sermap *map = kgdb_serlist;
-
-               while (map && memcmp(options, map->name, map->namelen))
-                       map = map->next;
-
-               if (!map) {
-                       KGDB_PRINTK("unknown port spec in %s\n", options);
-                       return -1;
-               }
-
-               kgdb_porttype = map;
-               kgdb_serial_setup = map->setup_fn;
-               kgdb_portnum = options[map->namelen] - '0';
-               options += map->namelen + 1;
-
-               options = (*options == ',') ? options+1 : options;
-
-               /* Read optional parameters (baud/parity/bits) */
-               baud = simple_strtoul(options, &options, 10);
-               if (baud != 0) {
-                       kgdb_baud = baud;
-
-                       c = toupper(*options);
-                       if (c == 'E' || c == 'O' || c == 'N') {
-                               kgdb_parity = c;
-                               options++;
-                       }
-
-                       c = *options;
-                       if (c == '7' || c == '8') {
-                               kgdb_bits = c;
-                               options++;
-                       }
-                       options = (*options == ',') ? options+1 : options;
-               }
-       }
-
-       /* Check for action specification */
-       if (!memcmp(options, "halt", 4)) {
-               kgdb_halt = 1;
-               options += 4;
-       } else if (!memcmp(options, "disabled", 8)) {
-               kgdb_enabled = 0;
-               options += 8;
-       }
-
-       if (*options) {
-                KGDB_PRINTK("ignored unknown options: %s\n", options);
-               return 0;
-       }
-       return 1;
-}
-__setup("kgdb=", kgdb_parse_options);
-#endif /* CONFIG_SH_KGDB */
-
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/time.c linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/time.c
--- linux-2.6.18-53.1.14/arch/sh/kernel/time.c  2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/time.c     2008-06-10 15:38:50.000000000 +0400
@@ -184,12 +184,4 @@ void __init time_init(void)
         */
        sys_timer = get_sys_timer();
        printk(KERN_INFO "Using %s for system timer\n", sys_timer->name);
-
-#if defined(CONFIG_SH_KGDB)
-       /*
-        * Set up kgdb as requested. We do it here because the serial
-        * init uses the timer vars we just set up for figuring baud.
-        */
-       kgdb_init();
-#endif
 }
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/kernel/traps.c linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/traps.c
--- linux-2.6.18-53.1.14/arch/sh/kernel/traps.c 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/kernel/traps.c    2008-06-10 15:38:50.000000000 +0400
@@ -26,6 +26,7 @@
 #include <linux/spinlock.h>
 #include <linux/module.h>
 #include <linux/kallsyms.h>
+#include <linux/kgdb.h>
 
 #include <asm/system.h>
 #include <asm/uaccess.h>
@@ -34,17 +35,8 @@
 #include <asm/processor.h>
 #include <asm/sections.h>
 
-#ifdef CONFIG_SH_KGDB
-#include <asm/kgdb.h>
-#define CHK_REMOTE_DEBUG(regs)                                               \
-{                                                                            \
-  if ((kgdb_debug_hook != (kgdb_debug_hook_t *) NULL) && (!user_mode(regs))) \
-  {                                                                          \
-    (*kgdb_debug_hook)(regs);                                                \
-  }                                                                          \
-}
-#else
-#define CHK_REMOTE_DEBUG(regs)
+#ifndef CONFIG_KGDB
+#define kgdb_handle_exception(t, s, e, r)
 #endif
 
 #define DO_ERROR(trapnr, signr, str, name, tsk)                                \
@@ -65,7 +57,7 @@ asmlinkage void do_##name(unsigned long 
        local_irq_enable();                                             \
        tsk->thread.error_code = error_code;                            \
        tsk->thread.trap_no = trapnr;                                   \
-        CHK_REMOTE_DEBUG(&regs);                                       \
+       kgdb_handle_exception(trapnr, signr, error_code, &regs);        \
        force_sig(signr, tsk);                                          \
        die_if_no_fixup(str,&regs,error_code);                          \
 }
@@ -92,10 +84,12 @@ void die(const char * str, struct pt_reg
 {
        static int die_counter;
 
+#ifdef CONFIG_KGDB
+       kgdb_handle_exception(1, SIGTRAP, err, regs);
+#endif
        console_verbose();
        spin_lock_irq(&die_lock);
        printk("%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter);
-       CHK_REMOTE_DEBUG(regs);
        show_regs(regs);
        spin_unlock_irq(&die_lock);
        do_exit(SIGSEGV);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/mm/extable.c linux-2.6.18-53.1.14.kgdb/arch/sh/mm/extable.c
--- linux-2.6.18-53.1.14/arch/sh/mm/extable.c   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/mm/extable.c      2008-06-10 15:38:50.000000000 +0400
@@ -5,6 +5,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/kgdb.h>
 #include <asm/uaccess.h>
 
 int fixup_exception(struct pt_regs *regs)
@@ -16,6 +17,12 @@ int fixup_exception(struct pt_regs *regs
                regs->pc = fixup->fixup;
                return 1;
        }
+#ifdef CONFIG_KGDB
+       if (atomic_read(&debugger_active) && kgdb_may_fault)
+               /* Restore our previous state. */
+               kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+               /* Never reached. */
+#endif
 
        return 0;
 }
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/mm/fault-nommu.c linux-2.6.18-53.1.14.kgdb/arch/sh/mm/fault-nommu.c
--- linux-2.6.18-53.1.14/arch/sh/mm/fault-nommu.c       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/mm/fault-nommu.c  2008-06-10 15:38:50.000000000 +0400
@@ -29,10 +29,6 @@
 #include <asm/mmu_context.h>
 #include <asm/cacheflush.h>
 
-#if defined(CONFIG_SH_KGDB)
-#include <asm/kgdb.h>
-#endif
-
 extern void die(const char *,struct pt_regs *,long);
 
 /*
@@ -43,11 +39,6 @@ extern void die(const char *,struct pt_r
 asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
                              unsigned long address)
 {
-#if defined(CONFIG_SH_KGDB)
-       if (kgdb_nofault && kgdb_bus_err_hook)
-               kgdb_bus_err_hook();
-#endif
-
        /*
         * Oops. The kernel tried to access some bad page. We'll have to
         * terminate things with extreme prejudice.
@@ -69,11 +60,6 @@ asmlinkage void do_page_fault(struct pt_
 asmlinkage int __do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
                               unsigned long address)
 {
-#if defined(CONFIG_SH_KGDB)
-       if (kgdb_nofault && kgdb_bus_err_hook)
-               kgdb_bus_err_hook();
-#endif
-
        if (address >= TASK_SIZE)
                return 1;
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/sh/mm/fault.c linux-2.6.18-53.1.14.kgdb/arch/sh/mm/fault.c
--- linux-2.6.18-53.1.14/arch/sh/mm/fault.c     2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/sh/mm/fault.c        2008-06-10 15:38:50.000000000 +0400
@@ -28,7 +28,6 @@
 #include <asm/pgalloc.h>
 #include <asm/mmu_context.h>
 #include <asm/cacheflush.h>
-#include <asm/kgdb.h>
 
 extern void die(const char *,struct pt_regs *,long);
 
@@ -45,11 +44,6 @@ asmlinkage void do_page_fault(struct pt_
        struct vm_area_struct * vma;
        unsigned long page;
 
-#ifdef CONFIG_SH_KGDB
-       if (kgdb_nofault && kgdb_bus_err_hook)
-               kgdb_bus_err_hook();
-#endif
-
        tsk = current;
        mm = tsk->mm;
 
@@ -153,6 +147,7 @@ no_context:
        }
        die("Oops", regs, writeaccess);
        do_exit(SIGKILL);
+       dump_stack();
 
 /*
  * We ran out of memory, or some other thing happened to us that made
@@ -202,11 +197,6 @@ asmlinkage int __do_page_fault(struct pt
        spinlock_t *ptl;
        int ret = 1;
 
-#ifdef CONFIG_SH_KGDB
-       if (kgdb_nofault && kgdb_bus_err_hook)
-               kgdb_bus_err_hook();
-#endif
-
 #ifdef CONFIG_SH_STORE_QUEUES
        addrmax = P4SEG_STORE_QUE + 0x04000000;
 #endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/x86_64/Kconfig.debug linux-2.6.18-53.1.14.kgdb/arch/x86_64/Kconfig.debug
--- linux-2.6.18-53.1.14/arch/x86_64/Kconfig.debug      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/arch/x86_64/Kconfig.debug 2008-06-10 15:38:44.000000000 +0400
@@ -55,7 +55,4 @@ config DEBUG_STACK_USAGE
 
          This option will slow down process creation somewhat.
 
-#config X86_REMOTE_DEBUG
-#       bool "kgdb debugging stub"
-
 endmenu
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/x86_64/kernel/Makefile linux-2.6.18-53.1.14.kgdb/arch/x86_64/kernel/Makefile
--- linux-2.6.18-53.1.14/arch/x86_64/kernel/Makefile    2008-03-06 05:54:48.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/x86_64/kernel/Makefile       2008-06-10 15:38:44.000000000 +0400
@@ -35,6 +35,7 @@ obj-$(CONFIG_IOMMU)           += pci-gart.o apert
 obj-$(CONFIG_CALGARY_IOMMU)    += pci-calgary.o tce.o
 obj-$(CONFIG_SWIOTLB)          += pci-swiotlb.o
 obj-$(CONFIG_KPROBES)          += kprobes.o
+obj-$(CONFIG_KGDB)             += kgdb.o kgdb-jmp.o
 obj-$(CONFIG_X86_PM_TIMER)     += pmtimer.o
 obj-$(CONFIG_X86_VSMP)         += vsmp.o
 obj-$(CONFIG_K8_NB)            += k8.o
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/x86_64/kernel/entry.S linux-2.6.18-53.1.14.kgdb/arch/x86_64/kernel/entry.S
--- linux-2.6.18-53.1.14/arch/x86_64/kernel/entry.S     2008-03-06 05:54:50.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/x86_64/kernel/entry.S        2008-06-10 15:39:01.000000000 +0400
@@ -42,6 +42,7 @@
 #include <asm/hw_irq.h>
 #include <asm/page.h>
 #include <asm/irqflags.h>
+#include <asm/kgdb.h>
 
        .code64
 
@@ -887,6 +888,7 @@ error_exit:         
        RESTORE_ARGS 0,8,0                                              
        jmp iret_label
        CFI_ENDPROC
+       CFI_END_FRAME(kernel_thread)
 
 error_kernelspace:
        incl %ebx
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/x86_64/kernel/kgdb-jmp.S linux-2.6.18-53.1.14.kgdb/arch/x86_64/kernel/kgdb-jmp.S
--- linux-2.6.18-53.1.14/arch/x86_64/kernel/kgdb-jmp.S  1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/x86_64/kernel/kgdb-jmp.S     2008-06-10 15:38:44.000000000 +0400
@@ -0,0 +1,65 @@
+/*
+ * arch/x86_64/kernel/kgdb-jmp.S
+ *
+ * Save and restore system registers so that within a limited frame we
+ * may have a fault and "jump back" to a known safe location.
+ *
+ * Author: Tom Rini <trini@kernel.crashing.org>
+ *
+ * Cribbed from glibc, which carries the following:
+ * Copyright (C) 2001, 2003, 2004 Free Software Foundation, Inc.
+ * Copyright (C) 2005 by MontaVista Software.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program as licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include <linux/linkage.h>
+
+#define JB_RBX         0
+#define JB_RBP         1
+#define JB_R12         2
+#define JB_R13         3
+#define JB_R14         4
+#define JB_R15         5
+#define JB_RSP         6
+#define JB_PC          7
+
+       .code64
+
+/* This must be called prior to kgdb_fault_longjmp and
+ * kgdb_fault_longjmp must not be called outside of the context of the
+ * last call to kgdb_fault_setjmp.
+ */
+ENTRY(kgdb_fault_setjmp)
+       /* Save registers. */
+       movq %rbx, (JB_RBX*8)(%rdi)
+       movq %rbp, (JB_RBP*8)(%rdi)
+       movq %r12, (JB_R12*8)(%rdi)
+       movq %r13, (JB_R13*8)(%rdi)
+       movq %r14, (JB_R14*8)(%rdi)
+       movq %r15, (JB_R15*8)(%rdi)
+       leaq 8(%rsp), %rdx      /* Save SP as it will be after we return. */
+       movq %rdx, (JB_RSP*8)(%rdi)
+       movq (%rsp), %rax       /* Save PC we are returning to now. */
+       movq %rax, (JB_PC*8)(%rdi)
+       /* Set return value for setjmp. */
+       mov $0,%eax
+       movq (JB_PC*8)(%rdi),%rdx
+       movq (JB_RSP*8)(%rdi),%rsp
+       jmpq *%rdx
+
+ENTRY(kgdb_fault_longjmp)
+       /* Restore registers. */
+       movq (JB_RBX*8)(%rdi),%rbx
+       movq (JB_RBP*8)(%rdi),%rbp
+       movq (JB_R12*8)(%rdi),%r12
+       movq (JB_R13*8)(%rdi),%r13
+       movq (JB_R14*8)(%rdi),%r14
+       movq (JB_R15*8)(%rdi),%r15
+       /* Set return value for setjmp. */
+       movq (JB_PC*8)(%rdi),%rdx
+       movq (JB_RSP*8)(%rdi),%rsp
+       mov $1,%eax
+       jmpq *%rdx
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/x86_64/kernel/kgdb.c linux-2.6.18-53.1.14.kgdb/arch/x86_64/kernel/kgdb.c
--- linux-2.6.18-53.1.14/arch/x86_64/kernel/kgdb.c      1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/x86_64/kernel/kgdb.c 2008-06-10 15:38:44.000000000 +0400
@@ -0,0 +1,474 @@
+/*
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ */
+
+/*
+ * Copyright (C) 2004 Amit S. Kale <amitkale@linsyssoft.com>
+ * Copyright (C) 2000-2001 VERITAS Software Corporation.
+ * Copyright (C) 2002 Andi Kleen, SuSE Labs
+ * Copyright (C) 2004 LinSysSoft Technologies Pvt. Ltd.
+ */
+/****************************************************************************
+ *  Contributor:     Lake Stevens Instrument Division$
+ *  Written by:      Glenn Engel $
+ *  Updated by:             Amit Kale<akale@veritas.com>
+ *  Modified for 386 by Jim Kingdon, Cygnus Support.
+ *  Origianl kgdb, compatibility with 2.1.xx kernel by
+ *  David Grothe <dave@gcom.com>
+ *  Integrated into 2.2.5 kernel by Tigran Aivazian <tigran@sco.com>
+ *  X86_64 changes from Andi Kleen's patch merged by Jim Houston
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <asm/system.h>
+#include <asm/ptrace.h>                /* for linux pt_regs struct */
+#include <linux/kgdb.h>
+#include <linux/init.h>
+#include <asm/apicdef.h>
+#include <asm/mach_apic.h>
+#include <asm/kdebug.h>
+#include <asm/debugreg.h>
+
+/* Put the error code here just in case the user cares.  */
+int gdb_x86_64errcode;
+/* Likewise, the vector number here (since GDB only gets the signal
+   number through the usual means, and that's not very specific).  */
+int gdb_x86_64vector = -1;
+
+extern atomic_t cpu_doing_single_step;
+
+void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+       gdb_regs[_RAX] = regs->rax;
+       gdb_regs[_RBX] = regs->rbx;
+       gdb_regs[_RCX] = regs->rcx;
+       gdb_regs[_RDX] = regs->rdx;
+       gdb_regs[_RSI] = regs->rsi;
+       gdb_regs[_RDI] = regs->rdi;
+       gdb_regs[_RBP] = regs->rbp;
+       gdb_regs[_PS] = regs->eflags;
+       gdb_regs[_PC] = regs->rip;
+       gdb_regs[_R8] = regs->r8;
+       gdb_regs[_R9] = regs->r9;
+       gdb_regs[_R10] = regs->r10;
+       gdb_regs[_R11] = regs->r11;
+       gdb_regs[_R12] = regs->r12;
+       gdb_regs[_R13] = regs->r13;
+       gdb_regs[_R14] = regs->r14;
+       gdb_regs[_R15] = regs->r15;
+       gdb_regs[_RSP] = regs->rsp;
+}
+
+extern void thread_return(void);
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+       gdb_regs[_RAX] = 0;
+       gdb_regs[_RBX] = 0;
+       gdb_regs[_RCX] = 0;
+       gdb_regs[_RDX] = 0;
+       gdb_regs[_RSI] = 0;
+       gdb_regs[_RDI] = 0;
+       gdb_regs[_RBP] = *(unsigned long *)p->thread.rsp;
+       gdb_regs[_PS] = *(unsigned long *)(p->thread.rsp + 8);
+       gdb_regs[_PC] = (unsigned long)&thread_return;
+       gdb_regs[_R8] = 0;
+       gdb_regs[_R9] = 0;
+       gdb_regs[_R10] = 0;
+       gdb_regs[_R11] = 0;
+       gdb_regs[_R12] = 0;
+       gdb_regs[_R13] = 0;
+       gdb_regs[_R14] = 0;
+       gdb_regs[_R15] = 0;
+       gdb_regs[_RSP] = p->thread.rsp;
+}
+
+void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+       regs->rax = gdb_regs[_RAX];
+       regs->rbx = gdb_regs[_RBX];
+       regs->rcx = gdb_regs[_RCX];
+       regs->rdx = gdb_regs[_RDX];
+       regs->rsi = gdb_regs[_RSI];
+       regs->rdi = gdb_regs[_RDI];
+       regs->rbp = gdb_regs[_RBP];
+       regs->eflags = gdb_regs[_PS];
+       regs->rip = gdb_regs[_PC];
+       regs->r8 = gdb_regs[_R8];
+       regs->r9 = gdb_regs[_R9];
+       regs->r10 = gdb_regs[_R10];
+       regs->r11 = gdb_regs[_R11];
+       regs->r12 = gdb_regs[_R12];
+       regs->r13 = gdb_regs[_R13];
+       regs->r14 = gdb_regs[_R14];
+       regs->r15 = gdb_regs[_R15];
+#if 0                          /* can't change these */
+       regs->rsp = gdb_regs[_RSP];
+       regs->ss = gdb_regs[_SS];
+       regs->fs = gdb_regs[_FS];
+       regs->gs = gdb_regs[_GS];
+#endif
+
+}                              /* gdb_regs_to_regs */
+
+struct hw_breakpoint {
+       unsigned enabled;
+       unsigned type;
+       unsigned len;
+       unsigned long addr;
+} breakinfo[4] = { {
+enabled:0}, {
+enabled:0}, {
+enabled:0}, {
+enabled:0}};
+
+void kgdb_correct_hw_break(void)
+{
+       int breakno;
+       int correctit;
+       int breakbit;
+       unsigned long dr7;
+
+       asm volatile ("movq %%db7, %0\n":"=r" (dr7):);
+       do {
+               unsigned long addr0, addr1, addr2, addr3;
+               asm volatile ("movq %%db0, %0\n"
+                             "movq %%db1, %1\n"
+                             "movq %%db2, %2\n"
+                             "movq %%db3, %3\n":"=r" (addr0), "=r"(addr1),
+                             "=r"(addr2), "=r"(addr3):);
+       } while (0);
+       correctit = 0;
+       for (breakno = 0; breakno < 3; breakno++) {
+               breakbit = 2 << (breakno << 1);
+               if (!(dr7 & breakbit) && breakinfo[breakno].enabled) {
+                       correctit = 1;
+                       dr7 |= breakbit;
+                       dr7 &= ~(0xf0000 << (breakno << 2));
+                       dr7 |= (((breakinfo[breakno].len << 2) |
+                                breakinfo[breakno].type) << 16) <<
+                           (breakno << 2);
+                       switch (breakno) {
+                       case 0:
+                               asm volatile ("movq %0, %%dr0\n"::"r"
+                                             (breakinfo[breakno].addr));
+                               break;
+
+                       case 1:
+                               asm volatile ("movq %0, %%dr1\n"::"r"
+                                             (breakinfo[breakno].addr));
+                               break;
+
+                       case 2:
+                               asm volatile ("movq %0, %%dr2\n"::"r"
+                                             (breakinfo[breakno].addr));
+                               break;
+
+                       case 3:
+                               asm volatile ("movq %0, %%dr3\n"::"r"
+                                             (breakinfo[breakno].addr));
+                               break;
+                       }
+               } else if ((dr7 & breakbit) && !breakinfo[breakno].enabled) {
+                       correctit = 1;
+                       dr7 &= ~breakbit;
+                       dr7 &= ~(0xf0000 << (breakno << 2));
+               }
+       }
+       if (correctit) {
+               asm volatile ("movq %0, %%db7\n"::"r" (dr7));
+       }
+}
+
+int kgdb_remove_hw_break(unsigned long addr)
+{
+       int i, idx = -1;
+       for (i = 0; i < 4; i++) {
+               if (breakinfo[i].addr == addr && breakinfo[i].enabled) {
+                       idx = i;
+                       break;
+               }
+       }
+       if (idx == -1)
+               return -1;
+
+       breakinfo[idx].enabled = 0;
+       return 0;
+}
+
+int kgdb_set_hw_break(unsigned long addr)
+{
+       int i, idx = -1;
+       for (i = 0; i < 4; i++) {
+               if (!breakinfo[i].enabled) {
+                       idx = i;
+                       break;
+               }
+       }
+       if (idx == -1)
+               return -1;
+
+       breakinfo[idx].enabled = 1;
+       breakinfo[idx].type = 1;
+       breakinfo[idx].len = 1;
+       breakinfo[idx].addr = addr;
+       return 0;
+}
+
+int remove_hw_break(unsigned breakno)
+{
+       if (!breakinfo[breakno].enabled) {
+               return -1;
+       }
+       breakinfo[breakno].enabled = 0;
+       return 0;
+}
+
+int set_hw_break(unsigned breakno, unsigned type, unsigned len, unsigned addr)
+{
+       if (breakinfo[breakno].enabled) {
+               return -1;
+       }
+       breakinfo[breakno].enabled = 1;
+       breakinfo[breakno].type = type;
+       breakinfo[breakno].len = len;
+       breakinfo[breakno].addr = addr;
+       return 0;
+}
+
+void kgdb_disable_hw_debug(struct pt_regs *regs)
+{
+       /* Disable hardware debugging while we are in kgdb */
+       asm volatile ("movq %0,%%db7": /* no output */ :"r" (0UL));
+}
+
+void kgdb_post_master_code(struct pt_regs *regs, int e_vector, int err_code)
+{
+       /* Master processor is completely in the debugger */
+       gdb_x86_64vector = e_vector;
+       gdb_x86_64errcode = err_code;
+}
+
+void kgdb_roundup_cpus(unsigned long flags)
+{
+       send_IPI_allbutself(APIC_DM_NMI);
+}
+
+int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
+                              char *remcomInBuffer, char *remcomOutBuffer,
+                              struct pt_regs *linux_regs)
+{
+       unsigned long addr, length;
+       unsigned long breakno, breaktype;
+       char *ptr;
+       int newPC;
+       unsigned long dr6;
+
+       switch (remcomInBuffer[0]) {
+       case 'c':
+       case 's':
+               /* try to read optional parameter, pc unchanged if no parm */
+               ptr = &remcomInBuffer[1];
+               if (kgdb_hex2long(&ptr, &addr))
+                       linux_regs->rip = addr;
+               newPC = linux_regs->rip;
+
+               /* clear the trace bit */
+               linux_regs->eflags &= ~TF_MASK;
+
+               atomic_set(&cpu_doing_single_step, -1);
+               /* set the trace bit if we're stepping */
+               if (remcomInBuffer[0] == 's') {
+                       linux_regs->eflags |= TF_MASK;
+                       debugger_step = 1;
+                       if (kgdb_contthread)
+                               atomic_set(&cpu_doing_single_step,
+                                          smp_processor_id());
+
+               }
+
+               asm volatile ("movq %%db6, %0\n":"=r" (dr6));
+               if (!(dr6 & 0x4000)) {
+                       for (breakno = 0; breakno < 4; ++breakno) {
+                               if (dr6 & (1 << breakno)) {
+                                       if (breakinfo[breakno].type == 0) {
+                                               /* Set restore flag */
+                                               linux_regs->eflags |=
+                                                   X86_EFLAGS_RF;
+                                               break;
+                                       }
+                               }
+                       }
+               }
+               kgdb_correct_hw_break();
+               asm volatile ("movq %0, %%db6\n"::"r" (0UL));
+
+               return (0);
+
+       case 'Y':
+               ptr = &remcomInBuffer[1];
+               kgdb_hex2long(&ptr, &breakno);
+               ptr++;
+               kgdb_hex2long(&ptr, &breaktype);
+               ptr++;
+               kgdb_hex2long(&ptr, &length);
+               ptr++;
+               kgdb_hex2long(&ptr, &addr);
+               if (set_hw_break(breakno & 0x3, breaktype & 0x3,
+                                length & 0x3, addr) == 0)
+                       strcpy(remcomOutBuffer, "OK");
+               else
+                       strcpy(remcomOutBuffer, "ERROR");
+               break;
+
+               /* Remove hardware breakpoint */
+       case 'y':
+               ptr = &remcomInBuffer[1];
+               kgdb_hex2long(&ptr, &breakno);
+               if (remove_hw_break(breakno & 0x3) == 0)
+                       strcpy(remcomOutBuffer, "OK");
+               else
+                       strcpy(remcomOutBuffer, "ERROR");
+               break;
+
+       }                       /* switch */
+       return -1;
+}
+
+static struct pt_regs *in_interrupt_stack(unsigned long rsp, int cpu)
+{
+       struct pt_regs *regs;
+       unsigned long end = (unsigned long)cpu_pda(cpu)->irqstackptr;
+       if (rsp <= end && rsp >= end - IRQSTACKSIZE + 8) {
+               regs = *(((struct pt_regs **)end) - 1);
+               return regs;
+       }
+       return NULL;
+}
+
+static struct pt_regs *in_exception_stack(unsigned long rsp, int cpu)
+{
+       int i;
+       struct tss_struct *init_tss = &__get_cpu_var(init_tss);
+       for (i = 0; i < N_EXCEPTION_STACKS; i++)
+               if (rsp >= init_tss[cpu].ist[i] &&
+                   rsp <= init_tss[cpu].ist[i] + EXCEPTION_STKSZ) {
+                       struct pt_regs *r =
+                           (void *)init_tss[cpu].ist[i] + EXCEPTION_STKSZ;
+                       return r - 1;
+               }
+       return NULL;
+}
+
+void kgdb_shadowinfo(struct pt_regs *regs, char *buffer, unsigned threadid)
+{
+       static char intr_desc[] = "Stack at interrupt entrypoint";
+       static char exc_desc[] = "Stack at exception entrypoint";
+       struct pt_regs *stregs;
+       int cpu = hard_smp_processor_id();
+
+       if ((stregs = in_interrupt_stack(regs->rsp, cpu)))
+               kgdb_mem2hex(intr_desc, buffer, strlen(intr_desc));
+       else if ((stregs = in_exception_stack(regs->rsp, cpu)))
+               kgdb_mem2hex(exc_desc, buffer, strlen(exc_desc));
+}
+
+struct task_struct *kgdb_get_shadow_thread(struct pt_regs *regs, int threadid)
+{
+       struct pt_regs *stregs;
+       int cpu = hard_smp_processor_id();
+
+       if ((stregs = in_interrupt_stack(regs->rsp, cpu)))
+               return current;
+       else if ((stregs = in_exception_stack(regs->rsp, cpu)))
+               return current;
+
+       return NULL;
+}
+
+struct pt_regs *kgdb_shadow_regs(struct pt_regs *regs, int threadid)
+{
+       struct pt_regs *stregs;
+       int cpu = hard_smp_processor_id();
+
+       if ((stregs = in_interrupt_stack(regs->rsp, cpu)))
+               return stregs;
+       else if ((stregs = in_exception_stack(regs->rsp, cpu)))
+               return stregs;
+
+       return NULL;
+}
+
+/* Register KGDB with the die_chain so that we hook into all of the right
+ * spots. */
+static int kgdb_notify(struct notifier_block *self, unsigned long cmd,
+                      void *ptr)
+{
+       struct die_args *args = ptr;
+       struct pt_regs *regs = args->regs;
+
+       if (cmd == DIE_PAGE_FAULT_NO_CONTEXT && atomic_read(&debugger_active)
+                       && kgdb_may_fault) {
+               kgdb_fault_longjmp(kgdb_fault_jmp_regs);
+               return NOTIFY_STOP;
+       /* CPU roundup? */
+       } else if (atomic_read(&debugger_active) && cmd == DIE_NMI_IPI) {
+               kgdb_nmihook(smp_processor_id(), regs);
+               return NOTIFY_STOP;
+               /* See if KGDB is interested. */
+       } else if (cmd == DIE_PAGE_FAULT || user_mode(regs) ||
+                  cmd == DIE_NMI_IPI || (cmd == DIE_DEBUG &&
+                                         atomic_read(&debugger_active)))
+               /* Userpace events, normal watchdog event, or spurious
+                * debug exception.  Ignore. */
+               return NOTIFY_DONE;
+
+       kgdb_handle_exception(args->trapnr, args->signr, args->err, regs);
+
+       return NOTIFY_STOP;
+}
+
+static struct notifier_block kgdb_notifier = {
+       .notifier_call = kgdb_notify,
+       .priority = 0x7fffffff, /* we need to notified first */
+};
+
+int kgdb_arch_init(void)
+{
+       atomic_notifier_chain_register(&die_chain, &kgdb_notifier);
+       return 0;
+}
+/*
+ * Skip an int3 exception when it occurs after a breakpoint has been
+ * removed. Backtrack eip by 1 since the int3 would have caused it to
+ * increment by 1.
+ */
+
+int kgdb_skipexception(int exception, struct pt_regs *regs)
+{
+       if (exception == 3 && kgdb_isremovedbreak(regs->rip - 1)) {
+               regs->rip -= 1;
+               return 1;
+       }
+       return 0;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+       .gdb_bpt_instr = {0xcc},
+       .flags = KGDB_HW_BREAKPOINT,
+       .shadowth = 1,
+};
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/arch/x86_64/mm/fault.c linux-2.6.18-53.1.14.kgdb/arch/x86_64/mm/fault.c
--- linux-2.6.18-53.1.14/arch/x86_64/mm/fault.c 2008-03-06 05:54:27.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/arch/x86_64/mm/fault.c    2008-06-10 15:38:41.000000000 +0400
@@ -557,6 +557,10 @@ no_context:
        if (is_errata93(regs, address))
                return; 
 
+       if (notify_die(DIE_PAGE_FAULT_NO_CONTEXT, "no context", regs,
+                               error_code, 14, SIGSEGV) == NOTIFY_STOP)
+               return;
+
 /*
  * Oops. The kernel tried to access some bad page. We'll have to
  * terminate things with extreme prejudice.
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/char/keyboard.c linux-2.6.18-53.1.14.kgdb/drivers/char/keyboard.c
--- linux-2.6.18-53.1.14/drivers/char/keyboard.c        2008-03-06 05:54:23.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/char/keyboard.c   2008-06-10 15:39:11.000000000 +0400
@@ -1174,6 +1174,7 @@ static void kbd_keycode(unsigned int key
                sysrq_down = 0;
        if (sysrq_down && down && !rep) {
                handle_sysrq(kbd_sysrq_xlate[keycode], regs, tty);
+               sysrq_down = 0;         /* In case we miss the 'up' event. */
                return;
        }
 #endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/net/Makefile linux-2.6.18-53.1.14.kgdb/drivers/net/Makefile
--- linux-2.6.18-53.1.14/drivers/net/Makefile   2008-03-06 05:54:59.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/net/Makefile      2008-06-10 15:37:55.000000000 +0400
@@ -221,6 +221,7 @@ obj-$(CONFIG_ETRAX_ETHERNET) += cris/
 obj-$(CONFIG_ENP2611_MSF_NET) += ixp2000/
 
 obj-$(CONFIG_NETCONSOLE) += netconsole.o
+obj-$(CONFIG_KGDBOE) += kgdboe.o
 
 obj-$(CONFIG_FS_ENET) += fs_enet/
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/net/kgdboe.c linux-2.6.18-53.1.14.kgdb/drivers/net/kgdboe.c
--- linux-2.6.18-53.1.14/drivers/net/kgdboe.c   1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/net/kgdboe.c      2008-06-10 15:37:55.000000000 +0400
@@ -0,0 +1,294 @@
+/*
+ * drivers/net/kgdboe.c
+ *
+ * A network interface for GDB.
+ * Based upon 'gdbserial' by David Grothe <dave@gcom.com>
+ * and Scott Foehner <sfoehner@engr.sgi.com>
+ *
+ * Maintainers: Amit S. Kale <amitkale@linsyssoft.com> and
+ *             Tom Rini <trini@kernel.crashing.org>
+ *
+ * 2004 (c) Amit S. Kale <amitkale@linsyssoft.com>
+ * 2004-2005 (c) MontaVista Software, Inc.
+ * 2005 (c) Wind River Systems, Inc.
+ *
+ * Contributors at various stages not listed above:
+ * San Mehat <nettwerk@biodome.org>, Robert Walsh <rjwalsh@durables.org>,
+ * wangdi <wangdi@clusterfs.com>, Matt Mackall <mpm@selenic.com>,
+ * Pavel Machek <pavel@suse.cz>, Jason Wessel <jason.wessel@windriver.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+#include <linux/kgdb.h>
+#include <linux/netpoll.h>
+#include <linux/init.h>
+
+#include <asm/atomic.h>
+
+#define IN_BUF_SIZE 512                /* power of 2, please */
+#define NOT_CONFIGURED_STRING "not_configured"
+#define OUT_BUF_SIZE 30                /* We don't want to send too big of a packet. */
+#define MAX_KGDBOE_CONFIG_STR 256
+
+static char in_buf[IN_BUF_SIZE], out_buf[OUT_BUF_SIZE];
+static int in_head, in_tail, out_count;
+static atomic_t in_count;
+/* 0 = unconfigured, 1 = netpoll options parsed, 2 = fully configured. */
+static int configured;
+static struct kgdb_io local_kgdb_io_ops;
+static int use_dynamic_mac;
+
+MODULE_DESCRIPTION("KGDB driver for network interfaces");
+MODULE_LICENSE("GPL");
+static char config[MAX_KGDBOE_CONFIG_STR] = NOT_CONFIGURED_STRING;
+static struct kparam_string kps = {
+       .string = config,
+       .maxlen = MAX_KGDBOE_CONFIG_STR,
+};
+
+static void rx_hook(struct netpoll *np, int port, char *msg, int len,
+                   struct sk_buff *skb)
+{
+       int i;
+
+       np->remote_port = port;
+
+       /* Copy the MAC address if we need to. */
+       if (use_dynamic_mac) {
+               memcpy(np->remote_mac, eth_hdr(skb)->h_source,
+                               sizeof(np->remote_mac));
+               use_dynamic_mac = 0;
+       }
+
+       /*
+        * This could be GDB trying to attach.  But it could also be GDB
+        * finishing up a session, with kgdb_connected=0 but GDB sending
+        * an ACK for the final packet.  To make sure we don't try and
+        * make a breakpoint when GDB is leaving, make sure that if
+        * !kgdb_connected the only len == 1 packet we allow is ^C.
+        */
+       if (!kgdb_connected && (len != 1 || msg[0] == 3) &&
+           !atomic_read(&kgdb_setting_breakpoint)) {
+               tasklet_schedule(&kgdb_tasklet_breakpoint);
+       }
+
+       for (i = 0; i < len; i++) {
+               if (msg[i] == 3)
+                       tasklet_schedule(&kgdb_tasklet_breakpoint);
+
+               if (atomic_read(&in_count) >= IN_BUF_SIZE) {
+                       /* buffer overflow, clear it */
+                       in_head = in_tail = 0;
+                       atomic_set(&in_count, 0);
+                       break;
+               }
+               in_buf[in_head++] = msg[i];
+               in_head &= (IN_BUF_SIZE - 1);
+               atomic_inc(&in_count);
+       }
+}
+
+static struct netpoll np = {
+       .dev_name = "eth0",
+       .name = "kgdboe",
+       .rx_hook = rx_hook,
+       .local_port = 6443,
+       .remote_port = 6442,
+       .remote_mac = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
+};
+
+static void eth_pre_exception_handler(void)
+{
+       /* Increment the module count when the debugger is active */
+       if (!kgdb_connected)
+               try_module_get(THIS_MODULE);
+       netpoll_set_trap(1);
+}
+
+static void eth_post_exception_handler(void)
+{
+       /* decrement the module count when the debugger detaches */
+       if (!kgdb_connected)
+               module_put(THIS_MODULE);
+       netpoll_set_trap(0);
+}
+
+static int eth_get_char(void)
+{
+       int chr;
+
+       while (atomic_read(&in_count) == 0)
+               netpoll_poll(&np);
+
+       chr = in_buf[in_tail++];
+       in_tail &= (IN_BUF_SIZE - 1);
+       atomic_dec(&in_count);
+       return chr;
+}
+
+static void eth_flush_buf(void)
+{
+       if (out_count && np.dev) {
+               netpoll_send_udp(&np, out_buf, out_count);
+               memset(out_buf, 0, sizeof(out_buf));
+               out_count = 0;
+       }
+}
+
+static void eth_put_char(u8 chr)
+{
+       out_buf[out_count++] = chr;
+       if (out_count == OUT_BUF_SIZE)
+               eth_flush_buf();
+}
+
+static int option_setup(char *opt)
+{
+       char opt_scratch[MAX_KGDBOE_CONFIG_STR];
+
+       /* If we're being given a new configuration, copy it in. */
+       if (opt != config)
+               strcpy(config, opt);
+       /* But work on a copy as netpoll_parse_options will eat it. */
+       strcpy(opt_scratch, opt);
+       configured = !netpoll_parse_options(&np, opt_scratch);
+
+       use_dynamic_mac = 1;
+
+       return 0;
+}
+__setup("kgdboe=", option_setup);
+
+/* With our config string set by some means, configure kgdboe. */
+static int configure_kgdboe(void)
+{
+       /* Try out the string. */
+       option_setup(config);
+
+       if (!configured) {
+               printk(KERN_ERR "kgdboe: configuration incorrect - kgdboe not "
+                      "loaded.\n");
+               printk(KERN_ERR "  Usage: kgdboe=[src-port]@[src-ip]/[dev],"
+                               "[tgt-port]@<tgt-ip>/<tgt-macaddr>\n");
+               return -EINVAL;
+       }
+
+       /* Bring it up. */
+       if (netpoll_setup(&np)) {
+               printk(KERN_ERR "kgdboe: netpoll_setup failed kgdboe failed\n");
+               return -EINVAL;
+       }
+
+       if (kgdb_register_io_module(&local_kgdb_io_ops)) {
+               netpoll_cleanup(&np);
+               return -EINVAL;
+       }
+
+       configured = 2;
+
+       return 0;
+}
+
+static int init_kgdboe(void)
+{
+       int ret;
+
+       /* Already done? */
+       if (configured == 2)
+               return 0;
+
+       /* OK, go ahead and do it. */
+       ret = configure_kgdboe();
+
+       if (configured == 2)
+               printk(KERN_INFO "kgdboe: debugging over ethernet enabled\n");
+
+       return ret;
+}
+
+static void cleanup_kgdboe(void)
+{
+       netpoll_cleanup(&np);
+       configured = 0;
+       kgdb_unregister_io_module(&local_kgdb_io_ops);
+}
+
+static int param_set_kgdboe_var(const char *kmessage, struct kernel_param *kp)
+{
+       char kmessage_save[MAX_KGDBOE_CONFIG_STR];
+       int msg_len = strlen(kmessage);
+
+       if (msg_len + 1 > MAX_KGDBOE_CONFIG_STR) {
+               printk(KERN_ERR "%s: string doesn't fit in %u chars.\n",
+                      kp->name, MAX_KGDBOE_CONFIG_STR - 1);
+               return -ENOSPC;
+       }
+
+       if (kgdb_connected) {
+               printk(KERN_ERR "kgdboe: Cannot reconfigure while KGDB is "
+                               "connected.\n");
+               return 0;
+       }
+
+       /* Start the reconfiguration process by saving the old string */
+       strncpy(kmessage_save, config, sizeof(kmessage_save));
+
+
+       /* Copy in the new param and strip out invalid characters so we
+        * can optionally specify the MAC.
+        */
+       strncpy(config, kmessage, sizeof(config));
+       msg_len--;
+       while (msg_len > 0 &&
+                       (config[msg_len] < ',' || config[msg_len] > 'f')) {
+               config[msg_len] = '\0';
+               msg_len--;
+       }
+
+       /* Check to see if we are unconfiguring the io module and that it
+        * was in a fully configured state, as this is the only time that
+        * netpoll_cleanup should get called
+        */
+       if (configured == 2 && strcmp(config, NOT_CONFIGURED_STRING) == 0) {
+               printk(KERN_INFO "kgdboe: reverting to unconfigured state\n");
+               cleanup_kgdboe();
+               return 0;
+       } else
+               /* Go and configure with the new params. */
+               configure_kgdboe();
+
+       if (configured == 2)
+               return 0;
+
+       /* If the new string was invalid, revert to the previous state, which
+        * is at a minimum not_configured. */
+       strncpy(config, kmessage_save, sizeof(config));
+       if (strcmp(kmessage_save, NOT_CONFIGURED_STRING) != 0) {
+               printk(KERN_INFO "kgdboe: reverting to prior configuration\n");
+               /* revert back to the original config */
+               strncpy(config, kmessage_save, sizeof(config));
+               configure_kgdboe();
+       }
+       return 0;
+}
+
+static struct kgdb_io local_kgdb_io_ops = {
+       .read_char = eth_get_char,
+       .write_char = eth_put_char,
+       .init = init_kgdboe,
+       .flush = eth_flush_buf,
+       .pre_exception = eth_pre_exception_handler,
+       .post_exception = eth_post_exception_handler
+};
+
+module_init(init_kgdboe);
+module_exit(cleanup_kgdboe);
+module_param_call(kgdboe, param_set_kgdboe_var, param_get_string, &kps, 0644);
+MODULE_PARM_DESC(kgdboe, " kgdboe=[src-port]@[src-ip]/[dev],"
+                "[tgt-port]@<tgt-ip>/<tgt-macaddr>\n");
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/8250.c linux-2.6.18-53.1.14.kgdb/drivers/serial/8250.c
--- linux-2.6.18-53.1.14/drivers/serial/8250.c  2008-03-06 05:54:43.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/8250.c     2008-06-10 15:37:43.000000000 +0400
@@ -2656,6 +2656,25 @@ void serial8250_unregister_port(int line
 }
 EXPORT_SYMBOL(serial8250_unregister_port);
 
+/**
+ *     serial8250_unregister_by_port - remove a 16x50 serial port
+ *     at runtime.
+ *     @port: A &struct uart_port that describes the port to remove.
+ *
+ *     Remove one serial port.  This may not be called from interrupt
+ *     context.  We hand the port back to the our control.
+ */
+void serial8250_unregister_by_port(struct uart_port *port)
+{
+       struct uart_8250_port *uart;
+
+       uart = serial8250_find_match_or_unused(port);
+
+       if (uart)
+               serial8250_unregister_port(uart->port.line);
+}
+EXPORT_SYMBOL(serial8250_unregister_by_port);
+
 static int __init serial8250_init(void)
 {
        int ret, i;
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/8250_kgdb.c linux-2.6.18-53.1.14.kgdb/drivers/serial/8250_kgdb.c
--- linux-2.6.18-53.1.14/drivers/serial/8250_kgdb.c     1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/8250_kgdb.c        2008-06-10 15:37:43.000000000 +0400
@@ -0,0 +1,516 @@
+/*
+ * 8250 interface for kgdb.
+ *
+ * This is a merging of many different drivers, and all of the people have
+ * had an impact in some form or another:
+ *
+ * 2004-2005 (c) MontaVista Software, Inc.
+ * 2005-2006 (c) Wind River Systems, Inc.
+ *
+ * Amit Kale <amitkale@emsyssoft.com>, David Grothe <dave@gcom.com>,
+ * Scott Foehner <sfoehner@engr.sgi.com>, George Anzinger <george@mvista.com>,
+ * Robert Walsh <rjwalsh@durables.org>, wangdi <wangdi@clusterfs.com>,
+ * San Mehat, Tom Rini <trini@mvista.com>,
+ * Jason Wessel <jason.wessel@windriver.com>
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/kgdb.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/serial_reg.h>
+#include <linux/serialP.h>
+#include <linux/ioport.h>
+
+#include <asm/io.h>
+#include <asm/serial.h>                /* For BASE_BAUD and SERIAL_PORT_DFNS */
+
+#include "8250.h"
+
+#define GDB_BUF_SIZE   512     /* power of 2, please */
+
+MODULE_DESCRIPTION("KGDB driver for the 8250");
+MODULE_LICENSE("GPL");
+/* These will conflict with early_param otherwise. */
+#ifdef CONFIG_KGDB_8250_MODULE
+static char config[256];
+module_param_string(kgdb8250, config, 256, 0);
+MODULE_PARM_DESC(kgdb8250,
+                " kgdb8250=<io or mmio>,<address>,<baud rate>,<irq>\n");
+static struct kgdb_io local_kgdb_io_ops;
+#endif                         /* CONFIG_KGDB_8250_MODULE */
+
+/* Speed of the UART. */
+static int kgdb8250_baud;
+
+/* Flag for if we need to call request_mem_region */
+static int kgdb8250_needs_request_mem_region;
+
+static char kgdb8250_buf[GDB_BUF_SIZE];
+static atomic_t kgdb8250_buf_in_cnt;
+static int kgdb8250_buf_out_inx;
+
+/* Old-style serial definitions, if existant, and a counter. */
+#ifdef CONFIG_KGDB_SIMPLE_SERIAL
+static int __initdata should_copy_rs_table = 1;
+static struct serial_state old_rs_table[] __initdata = {
+#ifdef SERIAL_PORT_DFNS
+       SERIAL_PORT_DFNS
+#endif
+};
+#endif
+
+/* Our internal table of UARTS. */
+#define UART_NR        CONFIG_SERIAL_8250_NR_UARTS
+static struct uart_port kgdb8250_ports[UART_NR];
+
+static struct uart_port *current_port;
+
+/* Base of the UART. */
+static void *kgdb8250_addr;
+
+/* Forward declarations. */
+static int kgdb8250_uart_init(void);
+static int __init kgdb_init_io(void);
+static int __init kgdb8250_opt(char *str);
+
+/* These are much shorter calls to ioread8/iowrite8 that take into
+ * account our shifts, etc. */
+static inline unsigned int kgdb_ioread(u8 mask)
+{
+       return ioread8(kgdb8250_addr + (mask << current_port->regshift));
+}
+
+static inline void kgdb_iowrite(u8 val, u8 mask)
+{
+       iowrite8(val, kgdb8250_addr + (mask << current_port->regshift));
+}
+
+/*
+ * Wait until the interface can accept a char, then write it.
+ */
+static void kgdb_put_debug_char(u8 chr)
+{
+       while (!(kgdb_ioread(UART_LSR) & UART_LSR_THRE)) ;
+
+       kgdb_iowrite(chr, UART_TX);
+}
+
+/*
+ * Get a byte from the hardware data buffer and return it
+ */
+static int read_data_bfr(void)
+{
+       char it = kgdb_ioread(UART_LSR);
+
+       if (it & UART_LSR_DR)
+               return kgdb_ioread(UART_RX);
+
+       /*
+        * If we have a framing error assume somebody messed with
+        * our uart.  Reprogram it and send '-' both ways...
+        */
+       if (it & 0xc) {
+               kgdb8250_uart_init();
+               kgdb_put_debug_char('-');
+               return '-';
+       }
+
+       return -1;
+}
+
+/*
+ * Get a char if available, return -1 if nothing available.
+ * Empty the receive buffer first, then look at the interface hardware.
+ */
+static int kgdb_get_debug_char(void)
+{
+       int retchr;
+
+       /* intr routine has q'd chars */
+       if (atomic_read(&kgdb8250_buf_in_cnt) != 0) {
+               retchr = kgdb8250_buf[kgdb8250_buf_out_inx++];
+               kgdb8250_buf_out_inx &= (GDB_BUF_SIZE - 1);
+               atomic_dec(&kgdb8250_buf_in_cnt);
+               return retchr;
+       }
+
+       do {
+               retchr = read_data_bfr();
+       } while (retchr < 0);
+
+       return retchr;
+}
+
+/*
+ * This is the receiver interrupt routine for the GDB stub.
+ * All that we need to do is verify that the interrupt happened on the
+ * line we're in charge of.  If this is true, schedule a breakpoint and
+ * return.
+ */
+static irqreturn_t
+kgdb8250_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+       if (kgdb_ioread(UART_IIR) & UART_IIR_RDI) {
+               /* Throw away the data if another I/O routine is active. */
+               if (kgdb_io_ops.read_char != kgdb_get_debug_char &&
+                               (kgdb_ioread(UART_LSR) & UART_LSR_DR))
+                       kgdb_ioread(UART_RX);
+               else
+                       breakpoint();
+       }
+
+       return IRQ_HANDLED;
+}
+
+/*
+ *  Initializes the UART.
+ *  Returns:
+ *     0 on success, 1 on failure.
+ */
+static int
+kgdb8250_uart_init (void)
+{
+       unsigned int ier, base_baud = current_port->uartclk ?
+               current_port->uartclk / 16 : BASE_BAUD;
+
+       /* test uart existance */
+       if(kgdb_ioread(UART_LSR) == 0xff)
+               return -1;
+
+       /* disable interrupts */
+       kgdb_iowrite(0, UART_IER);
+
+#if defined(CONFIG_ARCH_OMAP1510)
+       /* Workaround to enable 115200 baud on OMAP1510 internal ports */
+       if (cpu_is_omap1510() && is_omap_port((void *)kgdb8250_addr)) {
+               if (kgdb8250_baud == 115200) {
+                       base_baud = 1;
+                       kgdb8250_baud = 1;
+                       kgdb_iowrite(1, UART_OMAP_OSC_12M_SEL);
+               } else
+                       kgdb_iowrite(0, UART_OMAP_OSC_12M_SEL);
+       }
+#endif
+       /* set DLAB */
+       kgdb_iowrite(UART_LCR_DLAB, UART_LCR);
+
+       /* set baud */
+       kgdb_iowrite((base_baud / kgdb8250_baud) & 0xff, UART_DLL);
+       kgdb_iowrite((base_baud / kgdb8250_baud) >> 8, UART_DLM);
+
+       /* reset DLAB, set LCR */
+       kgdb_iowrite(UART_LCR_WLEN8, UART_LCR);
+
+       /* set DTR and RTS */
+       kgdb_iowrite(UART_MCR_OUT2 | UART_MCR_DTR | UART_MCR_RTS, UART_MCR);
+
+       /* setup fifo */
+       kgdb_iowrite(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR
+               | UART_FCR_CLEAR_XMIT | UART_FCR_TRIGGER_8,
+               UART_FCR);
+
+       /* clear pending interrupts */
+       kgdb_ioread(UART_IIR);
+       kgdb_ioread(UART_RX);
+       kgdb_ioread(UART_LSR);
+       kgdb_ioread(UART_MSR);
+
+       /* turn on RX interrupt only */
+       kgdb_iowrite(UART_IER_RDI, UART_IER);
+
+       /*
+        * Borrowed from the main 8250 driver.
+        * Try writing and reading the UART_IER_UUE bit (b6).
+        * If it works, this is probably one of the Xscale platform's
+        * internal UARTs.
+        * We're going to explicitly set the UUE bit to 0 before
+        * trying to write and read a 1 just to make sure it's not
+        * already a 1 and maybe locked there before we even start start.
+        */
+       ier = kgdb_ioread(UART_IER);
+       kgdb_iowrite(ier & ~UART_IER_UUE, UART_IER);
+       if (!(kgdb_ioread(UART_IER) & UART_IER_UUE)) {
+               /*
+                * OK it's in a known zero state, try writing and reading
+                * without disturbing the current state of the other bits.
+                */
+               kgdb_iowrite(ier | UART_IER_UUE, UART_IER);
+               if (kgdb_ioread(UART_IER) & UART_IER_UUE)
+                       /*
+                        * It's an Xscale.
+                        */
+                       ier |= UART_IER_UUE | UART_IER_RTOIE;
+       }
+       kgdb_iowrite(ier, UART_IER);
+       return 0;
+}
+
+/*
+ * Copy the old serial_state table to our uart_port table if we haven't
+ * had values specifically configured in.  We need to make sure this only
+ * happens once.
+ */
+static void __init kgdb8250_copy_rs_table(void)
+{
+#ifdef CONFIG_KGDB_SIMPLE_SERIAL
+       int i;
+
+       if (!should_copy_rs_table)
+               return;
+
+       for (i = 0; i < ARRAY_SIZE(old_rs_table); i++) {
+               kgdb8250_ports[i].iobase = old_rs_table[i].port;
+               kgdb8250_ports[i].irq = irq_canonicalize(old_rs_table[i].irq);
+               kgdb8250_ports[i].uartclk = old_rs_table[i].baud_base * 16;
+               kgdb8250_ports[i].membase = old_rs_table[i].iomem_base;
+               kgdb8250_ports[i].iotype = old_rs_table[i].io_type;
+               kgdb8250_ports[i].regshift = old_rs_table[i].iomem_reg_shift;
+               kgdb8250_ports[i].line = i;
+       }
+
+       should_copy_rs_table = 0;
+#endif
+}
+
+/*
+ * Hookup our IRQ line now that it is safe to do so, after we grab any
+ * memory regions we might need to.  If we haven't been initialized yet,
+ * go ahead and copy the old_rs_table in.
+ */
+static void __init kgdb8250_late_init(void)
+{
+       /* Try and copy the old_rs_table. */
+       kgdb8250_copy_rs_table();
+
+#if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
+       /* Take the port away from the main driver. */
+       serial8250_unregister_by_port(current_port);
+
+       /* Now reinit the port as the above has disabled things. */
+       kgdb8250_uart_init();
+#endif
+       /* We may need to call request_mem_region() first. */
+       if (kgdb8250_needs_request_mem_region)
+               request_mem_region(current_port->mapbase,
+                                  8 << current_port->regshift, "kgdb");
+       if (request_irq(current_port->irq, kgdb8250_interrupt, SA_SHIRQ,
+                       "GDB-stub", current_port) < 0)
+               printk(KERN_ERR "KGDB failed to request the serial IRQ (%d)\n",
+                      current_port->irq);
+}
+
+static __init int kgdb_init_io(void)
+{
+       /* Give us the basic table of uarts. */
+       kgdb8250_copy_rs_table();
+
+       /* We're either a module and parse a config string, or we have a
+        * semi-static config. */
+#ifdef CONFIG_KGDB_8250_MODULE
+       if (strlen(config)) {
+               if (kgdb8250_opt(config))
+                       return -EINVAL;
+       } else {
+               printk(KERN_ERR "kgdb8250: argument error, usage: "
+                      "kgdb8250=<io or mmio>,<address>,<baud rate>,<irq>\n");
+               return -EINVAL;
+       }
+#elif defined(CONFIG_KGDB_SIMPLE_SERIAL)
+       kgdb8250_baud = CONFIG_KGDB_BAUDRATE;
+
+       /* Setup our pointer to the serial port now. */
+       current_port = &kgdb8250_ports[CONFIG_KGDB_PORT_NUM];
+#else
+       if (kgdb8250_opt(CONFIG_KGDB_8250_CONF_STRING))
+               return -EINVAL;
+#endif
+
+
+       /* Internal driver setup. */
+       switch (current_port->iotype) {
+       case UPIO_MEM:
+               if (current_port->mapbase)
+                       kgdb8250_needs_request_mem_region = 1;
+               if (current_port->flags & UPF_IOREMAP) {
+                       current_port->membase = ioremap(current_port->mapbase,
+                                               8 << current_port->regshift);
+                       if (!current_port->membase)
+                               return -EIO;    /* Failed. */
+               }
+               kgdb8250_addr = current_port->membase;
+               break;
+       case UPIO_PORT:
+       default:
+               kgdb8250_addr = ioport_map(current_port->iobase,
+                                          8 << current_port->regshift);
+               if (!kgdb8250_addr)
+                       return -EIO;    /* Failed. */
+       }
+
+       if (kgdb8250_uart_init() == -1) {
+               printk(KERN_ERR "kgdb8250: init failed\n");
+               return -EIO;
+       }
+#ifdef CONFIG_KGDB_8250_MODULE
+       /* Attach the kgdb irq. When this is built into the kernel, it
+        * is called as a part of late_init sequence.
+        */
+       kgdb8250_late_init();
+       if (kgdb_register_io_module(&local_kgdb_io_ops))
+               return -EINVAL;
+
+       printk(KERN_INFO "kgdb8250: debugging enabled\n");
+#endif                         /* CONFIG_KGD_8250_MODULE */
+
+       return 0;
+}
+
+#ifdef CONFIG_KGDB_8250_MODULE
+/* If it is a module the kgdb_io_ops should be a static which
+ * is passed to the KGDB I/O initialization
+ */
+static struct kgdb_io local_kgdb_io_ops = {
+#else                          /* ! CONFIG_KGDB_8250_MODULE */
+struct kgdb_io kgdb_io_ops = {
+#endif                         /* ! CONFIG_KGD_8250_MODULE */
+       .read_char = kgdb_get_debug_char,
+       .write_char = kgdb_put_debug_char,
+       .init = kgdb_init_io,
+       .late_init = kgdb8250_late_init,
+};
+
+/**
+ *     kgdb8250_add_port - Define a serial port for use with KGDB
+ *     @i: The index of the port being added
+ *     @serial_req: The &struct uart_port describing the port
+ *
+ *     On platforms where we must register the serial device
+ *     dynamically, this is the best option if a platform also normally
+ *     calls early_serial_setup().
+ */
+void __init kgdb8250_add_port(int i, struct uart_port *serial_req)
+{
+       /* Make sure we've got the built-in data before we override. */
+       kgdb8250_copy_rs_table();
+
+       /* Copy the whole thing over. */
+       if (current_port != &kgdb8250_ports[i])
+                memcpy(&kgdb8250_ports[i], serial_req, sizeof(struct uart_port));
+}
+
+/**
+ *     kgdb8250_add_platform_port - Define a serial port for use with KGDB
+ *     @i: The index of the port being added
+ *     @p: The &struct plat_serial8250_port describing the port
+ *
+ *     On platforms where we must register the serial device
+ *     dynamically, this is the best option if a platform normally
+ *     handles uart setup with an array of &struct plat_serial8250_port.
+ */
+void __init kgdb8250_add_platform_port(int i, struct plat_serial8250_port *p)
+{
+       /* Make sure we've got the built-in data before we override. */
+       kgdb8250_copy_rs_table();
+
+       kgdb8250_ports[i].iobase = p->iobase;
+       kgdb8250_ports[i].membase = p->membase;
+       kgdb8250_ports[i].irq = p->irq;
+       kgdb8250_ports[i].uartclk = p->uartclk;
+       kgdb8250_ports[i].regshift = p->regshift;
+       kgdb8250_ports[i].iotype = p->iotype;
+       kgdb8250_ports[i].flags = p->flags;
+       kgdb8250_ports[i].mapbase = p->mapbase;
+}
+
+/*
+ * Syntax for this cmdline option is:
+ * kgdb8250=<io or mmio>,<address>,<baud rate>,<irq>"
+ */
+static int __init kgdb8250_opt(char *str)
+{
+       /* We'll fill out and use the first slot. */
+       current_port = &kgdb8250_ports[0];
+
+       if (!strncmp(str, "io", 2)) {
+               current_port->iotype = UPIO_PORT;
+               str += 2;
+       } else if (!strncmp(str, "mmap", 4)) {
+               current_port->iotype = UPIO_MEM;
+               current_port->flags |= UPF_IOREMAP;
+               str += 4;
+       } else if (!strncmp(str, "mmio", 4)) {
+               current_port->iotype = UPIO_MEM;
+               current_port->flags &= ~UPF_IOREMAP;
+               str += 4;
+       } else
+               goto errout;
+
+       if (*str != ',')
+               goto errout;
+       str++;
+
+       if (current_port->iotype == UPIO_PORT)
+               current_port->iobase = simple_strtoul(str, &str, 16);
+       else {
+               if (current_port->flags & UPF_IOREMAP)
+                       current_port->mapbase =
+                               (unsigned long) simple_strtoul(str, &str, 16);
+               else
+                       current_port->membase =
+                               (void *) simple_strtoul(str, &str, 16);
+       }
+
+       if (*str != ',')
+               goto errout;
+       str++;
+
+       kgdb8250_baud = simple_strtoul(str, &str, 10);
+       if (!kgdb8250_baud)
+               goto errout;
+
+       if (*str != ',')
+               goto errout;
+       str++;
+
+       current_port->irq = simple_strtoul(str, &str, 10);
+
+#ifdef CONFIG_KGDB_SIMPLE_SERIAL
+       should_copy_rs_table = 0;
+#endif
+
+       return 0;
+
+      errout:
+       printk(KERN_ERR "Invalid syntax for option kgdb8250=\n");
+       return 1;
+}
+
+#ifdef CONFIG_KGDB_8250_MODULE
+static void cleanup_kgdb8250(void)
+{
+       kgdb_unregister_io_module(&local_kgdb_io_ops);
+
+       /* Clean up the irq and memory */
+       free_irq(current_port->irq, current_port);
+
+       if (kgdb8250_needs_request_mem_region)
+               release_mem_region(current_port->mapbase,
+                                  8 << current_port->regshift);
+       /* Hook up the serial port back to what it was previously
+        * hooked up to.
+        */
+#if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
+       /* Give the port back to the 8250 driver. */
+       serial8250_register_port(current_port);
+#endif
+}
+
+module_init(kgdb_init_io);
+module_exit(cleanup_kgdb8250);
+#else                          /* ! CONFIG_KGDB_8250_MODULE */
+early_param("kgdb8250", kgdb8250_opt);
+#endif                         /* ! CONFIG_KGDB_8250_MODULE */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/Kconfig linux-2.6.18-53.1.14.kgdb/drivers/serial/Kconfig
--- linux-2.6.18-53.1.14/drivers/serial/Kconfig 2008-03-06 05:54:47.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/Kconfig    2008-06-10 15:37:43.000000000 +0400
@@ -107,7 +107,7 @@ config SERIAL_8250_CS
 
 config SERIAL_8250_NR_UARTS
        int "Maximum number of 8250/16550 serial ports"
-       depends on SERIAL_8250
+       depends on SERIAL_8250 || KGDB_8250
        default "4"
        help
          Set this to the number of serial ports you want the driver
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/Makefile linux-2.6.18-53.1.14.kgdb/drivers/serial/Makefile
--- linux-2.6.18-53.1.14/drivers/serial/Makefile        2008-03-06 05:54:47.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/Makefile   2008-06-10 15:38:14.000000000 +0400
@@ -47,6 +47,7 @@ obj-$(CONFIG_SERIAL_IMX) += imx.o
 obj-$(CONFIG_SERIAL_MPC52xx) += mpc52xx_uart.o
 obj-$(CONFIG_SERIAL_ICOM) += icom.o
 obj-$(CONFIG_SERIAL_M32R_SIO) += m32r_sio.o
+obj-$(CONFIG_KGDB_MPSC) += mpsc_kgdb.o
 obj-$(CONFIG_SERIAL_MPSC) += mpsc.o
 obj-$(CONFIG_ETRAX_SERIAL) += crisv10.o
 obj-$(CONFIG_SERIAL_JSM) += jsm/
@@ -57,3 +58,4 @@ obj-$(CONFIG_SERIAL_SGI_IOC3) += ioc3_se
 obj-$(CONFIG_SERIAL_AT91) += at91_serial.o
 obj-$(CONFIG_SERIAL_NETX) += netx-serial.o
 obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o
+obj-$(CONFIG_KGDB_8250) += 8250_kgdb.o
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/amba-pl011.c linux-2.6.18-53.1.14.kgdb/drivers/serial/amba-pl011.c
--- linux-2.6.18-53.1.14/drivers/serial/amba-pl011.c    2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/amba-pl011.c       2008-06-10 15:38:56.000000000 +0400
@@ -340,7 +340,7 @@ static int pl011_startup(struct uart_por
        /*
         * Allocate the IRQ
         */
-       retval = request_irq(uap->port.irq, pl011_int, 0, "uart-pl011", uap);
+       retval = request_irq(uap->port.irq, pl011_int, SA_SHIRQ, "uart-pl011", uap);
        if (retval)
                goto clk_dis;
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/cpm_uart/Makefile linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/Makefile
--- linux-2.6.18-53.1.14/drivers/serial/cpm_uart/Makefile       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/Makefile  2008-06-10 15:38:14.000000000 +0400
@@ -7,5 +7,6 @@ obj-$(CONFIG_SERIAL_CPM) += cpm_uart.o
 # Select the correct platform objects.
 cpm_uart-objs-$(CONFIG_CPM2)   += cpm_uart_cpm2.o
 cpm_uart-objs-$(CONFIG_8xx)    += cpm_uart_cpm1.o
+cpm_uart-objs-$(CONFIG_KGDB_CPM_UART)  += cpm_uart_kgdb.o
 
 cpm_uart-objs  := cpm_uart_core.o $(cpm_uart-objs-y)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/cpm_uart/cpm_uart.h linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/cpm_uart.h
--- linux-2.6.18-53.1.14/drivers/serial/cpm_uart/cpm_uart.h     2008-03-06 05:54:12.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/cpm_uart.h        2008-06-10 15:38:14.000000000 +0400
@@ -50,6 +50,39 @@
 
 #define SCC_WAIT_CLOSING 100
 
+#ifdef CONFIG_KGDB_CPM_UART
+
+/* Speed of the debug UART. */
+#if defined(CONFIG_KGDB_9600BAUD)
+#define KGDB_BAUD B9600
+#elif defined(CONFIG_KGDB_19200BAUD)
+#define KGDB_BAUD B19200
+#elif defined(CONFIG_KGDB_38400BAUD)
+#define KGDB_BAUD B38400
+#elif defined(CONFIG_KGDB_57600BAUD)
+#define KGDB_BAUD B57600
+#else
+#define KGDB_BAUD B115200      /* Start with this if not given */
+#endif
+
+#ifdef CONFIG_KGDB_CPM_UART_SCC1
+#define KGDB_PINFO_INDEX       UART_SCC1
+#elif CONFIG_KGDB_CPM_UART_SCC2
+#define KGDB_PINFO_INDEX       UART_SCC2
+#elif CONFIG_KGDB_CPM_UART_SCC3
+#define KGDB_PINFO_INDEX       UART_SCC3
+#elif CONFIG_KGDB_CPM_UART_SCC4
+#define KGDB_PINFO_INDEX       UART_SCC4
+#elif CONFIG_KGDB_CPM_UART_SMC1
+#define KGDB_PINFO_INDEX       UART_SMC1
+#elif CONFIG_KGDB_CPM_UART_SMC2
+#define KGDB_PINFO_INDEX       UART_SMC2
+#else
+#error The S(M)CC for kgdb console is undefined
+#endif
+
+#endif /* CONFIG_KGDB_CPM_UART */
+
 struct uart_cpm_port {
        struct uart_port        port;
        u16                     rx_nrfifos;
@@ -86,6 +119,9 @@ extern int cpm_uart_port_map[UART_NR];
 extern int cpm_uart_nr;
 extern struct uart_cpm_port cpm_uart_ports[UART_NR];
 
+void cpm_uart_early_write(int index, const char *s, u_int count);
+int cpm_uart_early_setup(int index,int early);
+
 /* these are located in their respective files */
 void cpm_line_cr_cmd(int line, int cmd);
 int cpm_uart_init_portdesc(void);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/cpm_uart/cpm_uart_core.c linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/cpm_uart_core.c
--- linux-2.6.18-53.1.14/drivers/serial/cpm_uart/cpm_uart_core.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/cpm_uart_core.c   2008-06-10 15:38:14.000000000 +0400
@@ -1070,22 +1070,17 @@ int cpm_uart_drv_get_platform_data(struc
        return 0;
 }
 
-#ifdef CONFIG_SERIAL_CPM_CONSOLE
-/*
- *     Print a string to the serial port trying not to disturb
- *     any possible real use of the port...
- *
- *     Note that this is called with interrupts already disabled
- */
-static void cpm_uart_console_write(struct console *co, const char *s,
+void cpm_uart_early_write(int index, const char *s,
                                   u_int count)
 {
-       struct uart_cpm_port *pinfo =
-           &cpm_uart_ports[cpm_uart_port_map[co->index]];
+       struct uart_cpm_port *pinfo;
        unsigned int i;
        volatile cbd_t *bdp, *bdbase;
        volatile unsigned char *cp;
 
+       BUG_ON(index>UART_NR);
+       pinfo = &cpm_uart_ports[index];
+
        /* Get the address of the host memory buffer.
         */
        bdp = pinfo->tx_cur;
@@ -1149,16 +1144,11 @@ static void cpm_uart_console_write(struc
        pinfo->tx_cur = (volatile cbd_t *) bdp;
 }
 
-
-static int __init cpm_uart_console_setup(struct console *co, char *options)
+int cpm_uart_early_setup(int index, int early)
 {
+       int ret;
        struct uart_port *port;
        struct uart_cpm_port *pinfo;
-       int baud = 38400;
-       int bits = 8;
-       int parity = 'n';
-       int flow = 'n';
-       int ret;
 
        struct fs_uart_platform_info *pdata;
        struct platform_device* pdev = early_uart_get_pdev(co->index);
@@ -1169,8 +1159,9 @@ static int __init cpm_uart_console_setup
                cpm_uart_init_portdesc();
        }
 
+       BUG_ON(index>UART_NR);
        port =
-           (struct uart_port *)&cpm_uart_ports[cpm_uart_port_map[co->index]];
+               (struct uart_port *)&cpm_uart_ports[index];
        pinfo = (struct uart_cpm_port *)port;
        if (!pdev) {
                if (pinfo->set_lineif)
@@ -1184,19 +1175,6 @@ static int __init cpm_uart_console_setup
                cpm_uart_drv_get_platform_data(pdev, 1);
        }
 
-       pinfo->flags |= FLAG_CONSOLE;
-
-       if (options) {
-               uart_parse_options(options, &baud, &parity, &bits, &flow);
-       } else {
-               bd_t *bd = (bd_t *) __res;
-
-               if (bd->bi_baudrate)
-                       baud = bd->bi_baudrate;
-               else
-                       baud = 9600;
-       }
-
        if (IS_SMC(pinfo)) {
                pinfo->smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
                pinfo->smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
@@ -1204,8 +1182,7 @@ static int __init cpm_uart_console_setup
                pinfo->sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX);
                pinfo->sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
        }
-
-       ret = cpm_uart_allocbuf(pinfo, 1);
+       ret = cpm_uart_allocbuf(pinfo, early);
 
        if (ret)
                return ret;
@@ -1217,6 +1194,56 @@ static int __init cpm_uart_console_setup
        else
                cpm_uart_init_scc(pinfo);
 
+       return 0;
+}
+
+#ifdef CONFIG_SERIAL_CPM_CONSOLE
+/*
+ *     Print a string to the serial port trying not to disturb
+ *     any possible real use of the port...
+ *
+ *     Note that this is called with interrupts already disabled
+ */
+
+static void cpm_uart_console_write(struct console *co, const char *s,
+                                  u_int count)
+{
+       cpm_uart_early_write(cpm_uart_port_map[co->index],s,count);
+}
+
+/*
+ * Setup console. Be careful is called early !
+ */
+static int __init cpm_uart_console_setup(struct console *co, char *options)
+{
+       struct uart_port *port;
+       struct uart_cpm_port *pinfo;
+       int baud = 115200;
+       int bits = 8;
+       int parity = 'n';
+       int flow = 'n';
+       int ret;
+
+       port =
+           (struct uart_port *)&cpm_uart_ports[cpm_uart_port_map[co->index]];
+       pinfo = (struct uart_cpm_port *)port;
+
+       pinfo->flags |= FLAG_CONSOLE;
+
+       if (options) {
+               uart_parse_options(options, &baud, &parity, &bits, &flow);
+       } else {
+               bd_t *bd = (bd_t *) __res;
+
+               if (bd->bi_baudrate)
+                       baud = bd->bi_baudrate;
+               else
+                       baud = 9600;
+       }
+
+       ret = cpm_uart_early_setup(cpm_uart_port_map[co->index], 1);
+       if(ret)
+               return ret;
        uart_set_options(port, co, baud, parity, bits, flow);
 
        return 0;
@@ -1364,6 +1391,12 @@ static int cpm_uart_init(void) {
 
                for (i = 0; i < cpm_uart_nr; i++) {
                        int con = cpm_uart_port_map[i];
+
+#ifdef CONFIG_KGDB_CPM_UART
+               /* We are not interested in ports yet utilized by kgdb */
+               if(con == KGDB_PINFO_INDEX)
+                       continue;
+#endif
                        cpm_uart_ports[con].port.line = i;
                        cpm_uart_ports[con].port.flags = UPF_BOOT_AUTOCONF;
                        uart_add_one_port(&cpm_reg, &cpm_uart_ports[con].port);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/cpm_uart/cpm_uart_cpm1.c linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/cpm_uart_cpm1.c
--- linux-2.6.18-53.1.14/drivers/serial/cpm_uart/cpm_uart_cpm1.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/cpm_uart_cpm1.c   2008-06-10 15:38:14.000000000 +0400
@@ -52,6 +52,7 @@ void cpm_line_cr_cmd(int line, int cmd)
 {
        ushort val;
        volatile cpm8xx_t *cp = cpmp;
+       unsigned *bcsr_io;
 
        switch (line) {
        case UART_SMC1:
@@ -94,12 +95,35 @@ void scc1_lineif(struct uart_cpm_port *p
 {
        /* XXX SCC1: insert port configuration here */
        pinfo->brg = 1;
+
+#if defined (CONFIG_MPC885ADS) || defined (CONFIG_MPC86XADS)
+       bcsr_io = ioremap(BCSR1, sizeof(unsigned long));
+
+       if (bcsr_io == NULL) {
+               printk(KERN_CRIT "Could not remap BCSR\n");
+               return;
+       }
+       out_be32(bcsr_io, in_be32(bcsr_io) & ~BCSR1_RS232EN_1);
+       iounmap(bcsr_io);
+#endif
 }
 
 void scc2_lineif(struct uart_cpm_port *pinfo)
 {
        /* XXX SCC2: insert port configuration here */
        pinfo->brg = 2;
+       unsigned *bcsr_io;
+
+#if defined (CONFIG_MPC885ADS) || defined (CONFIG_MPC86XADS)
+       bcsr_io = ioremap(BCSR1, sizeof(unsigned long));
+
+       if (bcsr_io == NULL) {
+               printk(KERN_CRIT "Could not remap BCSR\n");
+               return;
+       }
+        out_be32(bcsr_io, in_be32(bcsr_io) & ~BCSR1_RS232EN_2);
+       iounmap(bcsr_io);
+#endif
 }
 
 void scc3_lineif(struct uart_cpm_port *pinfo)
@@ -188,6 +212,10 @@ int cpm_uart_init_portdesc(void)
 {
        pr_debug("CPM uart[-]:init portdesc\n");
 
+       /* Check if we have called this yet. This may happen if early kgdb
+       breakpoint is on */
+       if(cpm_uart_nr)
+               return 0;
        cpm_uart_nr = 0;
 #ifdef CONFIG_SERIAL_CPM_SMC1
        cpm_uart_ports[UART_SMC1].smcp = &cpmp->cp_smc[0];
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/cpm_uart/cpm_uart_cpm2.c linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/cpm_uart_cpm2.c
--- linux-2.6.18-53.1.14/drivers/serial/cpm_uart/cpm_uart_cpm2.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/cpm_uart_cpm2.c   2008-06-10 15:38:14.000000000 +0400
@@ -256,6 +256,10 @@ int cpm_uart_init_portdesc(void)
 {
        pr_debug("CPM uart[-]:init portdesc\n");
 
+       /* Check if we have called this yet. This may happen if early kgdb
+       breakpoint is on */
+       if(cpm_uart_nr)
+               return 0;
        cpm_uart_nr = 0;
 #ifdef CONFIG_SERIAL_CPM_SMC1
        cpm_uart_ports[UART_SMC1].smcp = (smc_t *) & cpm2_immr->im_smc[0];
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/cpm_uart/cpm_uart_kgdb.c linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/cpm_uart_kgdb.c
--- linux-2.6.18-53.1.14/drivers/serial/cpm_uart/cpm_uart_kgdb.c        1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/cpm_uart/cpm_uart_kgdb.c   2008-06-10 15:38:14.000000000 +0400
@@ -0,0 +1,195 @@
+/*
+ * drivers/serial/cpm_uart/cpm_uart_kgdb.c
+ *
+ * CPM UART interface for kgdb.
+ *
+ * Author: Vitaly Bordug <vbordug@ru.mvista.com>
+ *
+ * Used some bits from drivers/serial/kgdb_8250.c as a template
+ *
+ * 2005 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/kgdb.h>
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
+#include <linux/serial_reg.h>
+
+#include <asm/io.h>
+#include <asm/serial.h>                /* For BASE_BAUD and SERIAL_PORT_DFNS */
+
+#include "cpm_uart.h"
+
+#define GDB_BUF_SIZE   512     /* power of 2, please */
+
+
+static char kgdb_buf[GDB_BUF_SIZE], *kgdbp;
+static int kgdb_chars;
+
+/* Forward declarations. */
+
+/*
+ * Receive character from the serial port.  This only works well
+ * before the port is initialize for real use.
+ */
+static int kgdb_wait_key(char *obuf)
+{
+       struct uart_cpm_port *pinfo;
+
+       u_char                          c, *cp;
+       volatile        cbd_t           *bdp;
+       int                             i;
+
+       pinfo = &cpm_uart_ports[KGDB_PINFO_INDEX];
+
+       /* Get the address of the host memory buffer.
+        */
+       bdp = pinfo->rx_cur;
+       while (bdp->cbd_sc & BD_SC_EMPTY);
+
+       /* If the buffer address is in the CPM DPRAM, don't
+        * convert it.
+        */
+       cp = cpm2cpu_addr(bdp->cbd_bufaddr);
+
+       if (obuf) {
+               i = c = bdp->cbd_datlen;
+               while (i-- > 0)
+               {
+                       *obuf++ = *cp++;
+               }
+       } else {
+               c = *cp;
+       }
+       bdp->cbd_sc |= BD_SC_EMPTY;
+
+       if (bdp->cbd_sc & BD_SC_WRAP) {
+               bdp = pinfo->rx_bd_base;
+       } else {
+               bdp++;
+       }
+       pinfo->rx_cur = (cbd_t *)bdp;
+
+       return((int)c);
+}
+
+
+/*
+ * Wait until the interface can accept a char, then write it.
+ */
+static void
+kgdb_put_debug_char(int chr)
+{
+       static char ch[2];
+       ch[0]=(char)chr;
+       cpm_uart_early_write(KGDB_PINFO_INDEX, ch, 1);
+}
+
+
+/*
+ * Get a char if available, return -1 if nothing available.
+ * Empty the receive buffer first, then look at the interface hardware.
+ */
+static int
+kgdb_get_debug_char(void)
+{
+       if (kgdb_chars<=0) {
+               kgdb_chars = kgdb_wait_key(kgdb_buf);
+               kgdbp = kgdb_buf;
+       }
+       kgdb_chars--;
+
+       return (*kgdbp++);
+}
+
+static void termios_set_options(int index,
+                int baud, int parity, int bits, int flow)
+{
+       struct termios termios;
+       struct uart_port *port;
+       struct uart_cpm_port *pinfo;
+
+       BUG_ON(index>UART_NR);
+
+       port =
+           (struct uart_port *)&cpm_uart_ports[index];
+       pinfo = (struct uart_cpm_port *)port;
+
+       /*
+        * Ensure that the serial console lock is initialised
+        * early.
+        */
+       spin_lock_init(&port->lock);
+
+       memset(&termios, 0, sizeof(struct termios));
+
+       termios.c_cflag = CREAD | HUPCL | CLOCAL;
+
+       termios.c_cflag |= baud;
+
+       if (bits == 7)
+               termios.c_cflag |= CS7;
+       else
+               termios.c_cflag |= CS8;
+
+       switch (parity) {
+       case 'o': case 'O':
+               termios.c_cflag |= PARODD;
+               /*fall through*/
+       case 'e': case 'E':
+               termios.c_cflag |= PARENB;
+               break;
+       }
+
+       if (flow == 'r')
+               termios.c_cflag |= CRTSCTS;
+
+       port->ops->set_termios(port, &termios, NULL);
+}
+
+/*
+ *  Returns:
+ *     0 on success, 1 on failure.
+ */
+static int kgdb_init(void)
+{
+       struct uart_port *port;
+       struct uart_cpm_port *pinfo;
+
+       int use_bootmem = 0; /* use dma by default */
+
+       if(!cpm_uart_nr)
+       {
+               use_bootmem = 1;
+               cpm_uart_init_portdesc();
+       }
+       port = (struct uart_port *)&cpm_uart_ports[KGDB_PINFO_INDEX];
+       pinfo = (struct uart_cpm_port *)port;
+
+       if (cpm_uart_early_setup(KGDB_PINFO_INDEX, use_bootmem))
+               return 1;
+
+       termios_set_options(KGDB_PINFO_INDEX, KGDB_BAUD,'n',8,'n');
+        if (IS_SMC(pinfo))
+                pinfo->smcp->smc_smcm |= SMCM_TX;
+        else
+                pinfo->sccp->scc_sccm |= UART_SCCM_TX;
+
+       return 0;
+}
+
+
+struct kgdb_io kgdb_io_ops = {
+       .read_char = kgdb_get_debug_char,
+       .write_char = kgdb_put_debug_char,
+       .init = kgdb_init,
+};
+
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/mpsc.c linux-2.6.18-53.1.14.kgdb/drivers/serial/mpsc.c
--- linux-2.6.18-53.1.14/drivers/serial/mpsc.c  2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/mpsc.c     2008-06-10 15:38:14.000000000 +0400
@@ -242,6 +242,11 @@ struct mpsc_port_info *mpsc_device_remov
 #define        MPSC_RCRR                       0x0004
 #define        MPSC_TCRR                       0x0008
 
+/* MPSC Interrupt registers (offset from MV64x60_SDMA_INTR_OFFSET) */
+#define MPSC_INTR_CAUSE                        0x0004
+#define MPSC_INTR_MASK                 0x0084
+#define MPSC_INTR_CAUSE_RCC            (1<<6)
+
 /* Serial DMA Controller Interface Registers */
 #define        SDMA_SDC                        0x0000
 #define        SDMA_SDCM                       0x0008
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/mpsc_kgdb.c linux-2.6.18-53.1.14.kgdb/drivers/serial/mpsc_kgdb.c
--- linux-2.6.18-53.1.14/drivers/serial/mpsc_kgdb.c     1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/mpsc_kgdb.c        2008-06-10 15:38:14.000000000 +0400
@@ -0,0 +1,299 @@
+/*
+ * drivers/serial/mpsc_kgdb.c
+ *
+ * KGDB driver for the Marvell MultiProtocol Serial Controller (MPCS)
+ *
+ * Based on the polled boot loader driver by Ajit Prem (ajit.prem@motorola.com)
+ *
+ * Author: Randy Vinson <rvinson@mvista.com>
+ *
+ * 2005 (c) MontaVista Software, Inc.
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/kgdb.h>
+#include <linux/mv643xx.h>
+#include <linux/device.h>
+#include <asm/mv64x60.h>
+#include <asm/serial.h>
+#include <asm/io.h>
+#include <asm/delay.h>
+
+#include "mpsc.h"
+
+/* Speed of the UART. */
+static int kgdbmpsc_baud = CONFIG_KGDB_BAUDRATE;
+
+/* Index of the UART, matches ttyMX naming. */
+static int kgdbmpsc_ttyMM = CONFIG_KGDB_PORT_NUM;
+
+#define MPSC_INTR_REG_SELECT(x)        ((x) + (8 * kgdbmpsc_ttyMM))
+
+static int kgdbmpsc_init(void);
+
+static struct platform_device mpsc_dev, shared_dev;
+
+static void __iomem *mpsc_base;
+static void __iomem *brg_base;
+static void __iomem *routing_base;
+static void __iomem *sdma_base;
+
+static unsigned int mpsc_irq;
+
+static void kgdb_write_debug_char(int c)
+{
+       u32 data;
+
+       data = readl(mpsc_base + MPSC_MPCR);
+       writeb(c, mpsc_base + MPSC_CHR_1);
+       mb();
+       data = readl(mpsc_base + MPSC_CHR_2);
+       data |= MPSC_CHR_2_TTCS;
+       writel(data, mpsc_base + MPSC_CHR_2);
+       mb();
+
+       while (readl(mpsc_base + MPSC_CHR_2) & MPSC_CHR_2_TTCS) ;
+}
+
+static int kgdb_get_debug_char(void)
+{
+       unsigned char c;
+
+       while (!(readl(sdma_base + MPSC_INTR_REG_SELECT(MPSC_INTR_CAUSE)) &
+                MPSC_INTR_CAUSE_RCC)) ;
+
+       c = readb(mpsc_base + MPSC_CHR_10 + (1 << 1));
+       mb();
+       writeb(c, mpsc_base + MPSC_CHR_10 + (1 << 1));
+       mb();
+       writel(~MPSC_INTR_CAUSE_RCC, sdma_base +
+              MPSC_INTR_REG_SELECT(MPSC_INTR_CAUSE));
+       return (c);
+}
+
+/*
+ * This is the receiver interrupt routine for the GDB stub.
+ * All that we need to do is verify that the interrupt happened on the
+ * line we're in charge of.  If this is true, schedule a breakpoint and
+ * return.
+ */
+static irqreturn_t
+kgdbmpsc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+       if (irq != mpsc_irq)
+               return IRQ_NONE;
+       /*
+        * If  there is some other CPU in KGDB then this is a
+        * spurious interrupt. so return without even checking a byte
+        */
+       if (atomic_read(&debugger_active))
+               return IRQ_NONE;
+
+       if (readl(sdma_base + MPSC_INTR_REG_SELECT(MPSC_INTR_CAUSE)) &
+           MPSC_INTR_CAUSE_RCC)
+               breakpoint();
+
+       return IRQ_HANDLED;
+}
+
+static int __init kgdbmpsc_init(void)
+{
+       struct mpsc_pdata *pdata;
+       u32 cdv;
+
+       if (!brg_base || !mpsc_base || !routing_base || !sdma_base)
+               return -1;
+
+       /* Set MPSC Routing to enable both ports */
+       writel(0x0, routing_base + MPSC_MRR);
+
+       /* MPSC 0/1 Rx & Tx get clocks BRG0/1 */
+       writel(0x00000100, routing_base + MPSC_RCRR);
+       writel(0x00000100, routing_base + MPSC_TCRR);
+
+       /* Disable all MPSC interrupts and clear any pending interrupts */
+       writel(0, sdma_base + MPSC_INTR_REG_SELECT(MPSC_INTR_MASK));
+       writel(0, sdma_base + MPSC_INTR_REG_SELECT(MPSC_INTR_CAUSE));
+
+       pdata = (struct mpsc_pdata *)mpsc_dev.dev.platform_data;
+
+       /* cdv = (clock/(2*16*baud rate)) for 16X mode. */
+       cdv = ((pdata->brg_clk_freq / (32 * kgdbmpsc_baud)) - 1);
+       writel((pdata->brg_clk_src << 18) | (1 << 16) | cdv,
+              brg_base + BRG_BCR);
+
+       /* Put MPSC into UART mode, no null modem, 16x clock mode */
+       writel(0x000004c4, mpsc_base + MPSC_MMCRL);
+       writel(0x04400400, mpsc_base + MPSC_MMCRH);
+
+       writel(0, mpsc_base + MPSC_CHR_1);
+       writel(0, mpsc_base + MPSC_CHR_9);
+       writel(0, mpsc_base + MPSC_CHR_10);
+       writel(4, mpsc_base + MPSC_CHR_3);
+       writel(0x20000000, mpsc_base + MPSC_CHR_4);
+       writel(0x9000, mpsc_base + MPSC_CHR_5);
+       writel(0, mpsc_base + MPSC_CHR_6);
+       writel(0, mpsc_base + MPSC_CHR_7);
+       writel(0, mpsc_base + MPSC_CHR_8);
+
+       /* 8 data bits, 1 stop bit */
+       writel((3 << 12), mpsc_base + MPSC_MPCR);
+
+       /* Enter "hunt" mode */
+       writel((1 << 31), mpsc_base + MPSC_CHR_2);
+
+       udelay(100);
+       return 0;
+}
+
+static void __iomem *__init
+kgdbmpsc_map_resource(struct platform_device *pd, int type, int num)
+{
+       void __iomem *base = NULL;
+       struct resource *r;
+
+       if ((r = platform_get_resource(pd, IORESOURCE_MEM, num)))
+               base = ioremap(r->start, r->end - r->start + 1);
+       return base;
+}
+
+static void __iomem *__init
+kgdbmpsc_unmap_resource(struct platform_device *pd, int type, int num,
+                       void __iomem * base)
+{
+       if (base)
+               iounmap(base);
+       return NULL;
+}
+
+static void __init
+kgdbmpsc_reserve_resource(struct platform_device *pd, int type, int num)
+{
+       struct resource *r;
+
+       if ((r = platform_get_resource(pd, IORESOURCE_MEM, num)))
+               request_mem_region(r->start, r->end - r->start + 1, "kgdb");
+}
+
+static int __init kgdbmpsc_local_init(void)
+{
+       if (!mpsc_dev.num_resources || !shared_dev.num_resources)
+               return 1;       /* failure */
+
+       mpsc_base = kgdbmpsc_map_resource(&mpsc_dev, IORESOURCE_MEM,
+                                         MPSC_BASE_ORDER);
+       brg_base = kgdbmpsc_map_resource(&mpsc_dev, IORESOURCE_MEM,
+                                        MPSC_BRG_BASE_ORDER);
+
+       /* get the platform data for the shared registers and get them mapped */
+       routing_base = kgdbmpsc_map_resource(&shared_dev,
+                                            IORESOURCE_MEM,
+                                            MPSC_ROUTING_BASE_ORDER);
+       sdma_base =
+           kgdbmpsc_map_resource(&shared_dev, IORESOURCE_MEM,
+                                 MPSC_SDMA_INTR_BASE_ORDER);
+
+       mpsc_irq = platform_get_irq(&mpsc_dev, 1);
+
+       if (mpsc_base && brg_base && routing_base && sdma_base)
+               return 0;       /* success */
+
+       return 1;               /* failure */
+}
+
+static void __init kgdbmpsc_local_exit(void)
+{
+       if (sdma_base)
+               sdma_base = kgdbmpsc_unmap_resource(&shared_dev, IORESOURCE_MEM,
+                                                   MPSC_SDMA_INTR_BASE_ORDER,
+                                                   sdma_base);
+       if (routing_base)
+               routing_base = kgdbmpsc_unmap_resource(&shared_dev,
+                                                      IORESOURCE_MEM,
+                                                      MPSC_ROUTING_BASE_ORDER,
+                                                      routing_base);
+       if (brg_base)
+               brg_base = kgdbmpsc_unmap_resource(&mpsc_dev, IORESOURCE_MEM,
+                                                  MPSC_BRG_BASE_ORDER,
+                                                  brg_base);
+       if (mpsc_base)
+               mpsc_base = kgdbmpsc_unmap_resource(&mpsc_dev, IORESOURCE_MEM,
+                                                   MPSC_BASE_ORDER, mpsc_base);
+}
+
+static void __init kgdbmpsc_update_pdata(struct platform_device *pdev)
+{
+
+       snprintf(pdev->dev.bus_id, BUS_ID_SIZE, "%s%u", pdev->name, pdev->id);
+}
+
+static int __init kgdbmpsc_pdev_init(void)
+{
+       struct platform_device *pdev;
+
+       /* get the platform data for the specified port. */
+       pdev = mv64x60_early_get_pdev_data(MPSC_CTLR_NAME, kgdbmpsc_ttyMM, 1);
+       if (pdev) {
+               memcpy(&mpsc_dev, pdev, sizeof(struct platform_device));
+               if (platform_notify) {
+                       kgdbmpsc_update_pdata(&mpsc_dev);
+                       platform_notify(&mpsc_dev.dev);
+               }
+
+               /* get the platform data for the shared registers. */
+               pdev = mv64x60_early_get_pdev_data(MPSC_SHARED_NAME, 0, 0);
+               if (pdev) {
+                       memcpy(&shared_dev, pdev,
+                              sizeof(struct platform_device));
+                       if (platform_notify) {
+                               kgdbmpsc_update_pdata(&shared_dev);
+                               platform_notify(&shared_dev.dev);
+                       }
+               }
+       }
+       return 0;
+}
+
+postcore_initcall(kgdbmpsc_pdev_init);
+
+static int __init kgdbmpsc_init_io(void)
+{
+
+       kgdbmpsc_pdev_init();
+
+       if (kgdbmpsc_local_init()) {
+               kgdbmpsc_local_exit();
+               return -1;
+       }
+
+       if (kgdbmpsc_init() == -1)
+               return -1;
+       return 0;
+}
+
+static void __init kgdbmpsc_hookup_irq(void)
+{
+       unsigned int msk;
+       if (!request_irq(mpsc_irq, kgdbmpsc_interrupt, 0, "kgdb mpsc", NULL)) {
+               /* Enable interrupt */
+               msk = readl(sdma_base + MPSC_INTR_REG_SELECT(MPSC_INTR_MASK));
+               msk |= MPSC_INTR_CAUSE_RCC;
+               writel(msk, sdma_base + MPSC_INTR_REG_SELECT(MPSC_INTR_MASK));
+
+               kgdbmpsc_reserve_resource(&mpsc_dev, IORESOURCE_MEM,
+                                         MPSC_BASE_ORDER);
+               kgdbmpsc_reserve_resource(&mpsc_dev, IORESOURCE_MEM,
+                                         MPSC_BRG_BASE_ORDER);
+       }
+}
+
+struct kgdb_io kgdb_io_ops = {
+       .read_char = kgdb_get_debug_char,
+       .write_char = kgdb_write_debug_char,
+       .init = kgdbmpsc_init_io,
+       .late_init = kgdbmpsc_hookup_irq,
+};
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/pxa.c linux-2.6.18-53.1.14.kgdb/drivers/serial/pxa.c
--- linux-2.6.18-53.1.14/drivers/serial/pxa.c   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/pxa.c      2008-06-10 15:38:56.000000000 +0400
@@ -42,6 +42,9 @@
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
 #include <linux/serial_core.h>
+#ifdef CONFIG_KGDB_CONSOLE
+#include <linux/kgdb.h>
+#endif
 
 #include <asm/io.h>
 #include <asm/hardware.h>
@@ -692,6 +695,8 @@ serial_pxa_console_init(void)
 console_initcall(serial_pxa_console_init);
 
 #define PXA_CONSOLE    &serial_pxa_console
+#elif defined(CONFIG_KGDB_CONSOLE)
+#define PXA_CONSOLE    &kgdbcons
 #else
 #define PXA_CONSOLE    NULL
 #endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/serial_core.c linux-2.6.18-53.1.14.kgdb/drivers/serial/serial_core.c
--- linux-2.6.18-53.1.14/drivers/serial/serial_core.c   2008-03-06 05:54:07.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/serial_core.c      2008-06-10 15:37:43.000000000 +0400
@@ -33,6 +33,7 @@
 #include <linux/serial.h> /* for serial_state and serial_icounter_struct */
 #include <linux/delay.h>
 #include <linux/mutex.h>
+#include <linux/kgdb.h>
 
 #include <asm/irq.h>
 #include <asm/uaccess.h>
@@ -65,6 +66,12 @@ static struct lock_class_key port_lock_k
 #define uart_console(port)     (0)
 #endif
 
+#ifdef CONFIG_KGDB_CONSOLE
+#define uart_kgdb(port)                (port->cons && !strcmp(port->cons->name, "kgdb"))
+#else
+#define uart_kgdb(port)                (0)
+#endif
+
 static void uart_change_speed(struct uart_state *state, struct termios *old_termios);
 static void uart_wait_until_sent(struct tty_struct *tty, int timeout);
 static void uart_change_pm(struct uart_state *state, int pm_state);
@@ -1673,6 +1680,9 @@ static int uart_line_info(char *buf, str
                        port->iotype == UPIO_MEM ? port->mapbase :
                                                (unsigned long) port->iobase,
                        port->irq);
+       if (port->iotype == UPIO_MEM)
+               ret += sprintf(buf+ret, " membase 0x%08lX",
+                                          (unsigned long) port->membase);
 
        if (port->type == PORT_UNKNOWN) {
                strcat(buf, "\n");
@@ -2043,7 +2053,8 @@ uart_report_port(struct uart_driver *drv
        case UPIO_AU:
        case UPIO_TSI:
                snprintf(address, sizeof(address),
-                        "MMIO 0x%lx", port->mapbase);
+                       "MMIO map 0x%lx mem 0x%lx", port->mapbase,
+                       (unsigned long) port->membase);
                break;
        default:
                strlcpy(address, "*unknown*", sizeof(address));
@@ -2095,9 +2106,9 @@ uart_configure_port(struct uart_driver *
 
                /*
                 * Power down all ports by default, except the
-                * console if we have one.
+                * console (real or kgdb) if we have one.
                 */
-               if (!uart_console(port))
+               if (!uart_console(port) && !uart_kgdb(port))
                        uart_change_pm(state, 3);
        }
 }
@@ -2289,6 +2300,12 @@ int uart_add_one_port(struct uart_driver
         */
        port->flags &= ~UPF_DEAD;
 
+#if defined(CONFIG_KGDB_8250)
+       /* Add any 8250-like ports we find later. */
+       if (port->type <= PORT_MAX_8250)
+               kgdb8250_add_port(port->line, port);
+#endif
+
  out:
        mutex_unlock(&state->mutex);
        mutex_unlock(&port_mutex);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/serial_txx9.c linux-2.6.18-53.1.14.kgdb/drivers/serial/serial_txx9.c
--- linux-2.6.18-53.1.14/drivers/serial/serial_txx9.c   2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/serial_txx9.c      2008-06-10 15:38:24.000000000 +0400
@@ -1164,6 +1164,96 @@ static struct pci_driver serial_txx9_pci
 MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
 #endif /* ENABLE_SERIAL_TXX9_PCI */
 
+/******************************************************************************/
+/* BEG: KDBG Routines                                                         */
+/******************************************************************************/
+
+#ifdef CONFIG_KGDB
+int kgdb_init_count = 0;
+
+void txx9_sio_kgdb_hook(unsigned int port, unsigned int baud_rate)
+{
+       static struct resource kgdb_resource;
+       int ret;
+       struct uart_txx9_port *up = &serial_txx9_ports[port];
+
+       /* prevent initialization by driver */
+       kgdb_resource.name = "serial_txx9(debug)";
+       kgdb_resource.start = (unsigned long)up->port.membase;
+       kgdb_resource.end = (unsigned long)(up->port.membase + 36 - 1);
+       kgdb_resource.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+
+       ret = request_resource(&iomem_resource, &kgdb_resource);
+       if(ret == -EBUSY)
+               printk(" serial_txx9(debug): request_resource failed\n");
+
+       return;
+}
+void
+txx9_sio_kdbg_init( unsigned int port_number )
+{
+       if (port_number == 1) {
+               txx9_sio_kgdb_hook(port_number, 38400);
+       } else {
+               printk("Bad Port Number [%u] != [1]\n",port_number);
+       }
+       return;
+}
+
+u8
+txx9_sio_kdbg_rd( void )
+{
+       unsigned int status,ch;
+       struct uart_txx9_port *up = &serial_txx9_ports[1];
+
+       if (kgdb_init_count == 0) {
+               txx9_sio_kdbg_init(1);
+               kgdb_init_count = 1;
+       }
+
+       while (1) {
+               status = sio_in(up, TXX9_SIDISR);
+               if ( status & 0x1f ) {
+                       ch = sio_in(up, TXX9_SIRFIFO );
+                       break;
+               }
+       }
+
+       return (ch);
+}
+
+int
+txx9_sio_kdbg_wr( u8 ch )
+{
+       unsigned int status;
+       struct uart_txx9_port *up = &serial_txx9_ports[1];
+
+       if (kgdb_init_count == 0) {
+               txx9_sio_kdbg_init(1);
+               kgdb_init_count = 1;
+       }
+
+       while (1) {
+               status = sio_in(up, TXX9_SICISR);
+               if (status & TXX9_SICISR_TRDY) {
+                       if ( ch == '\n' ) {
+                               txx9_sio_kdbg_wr( '\r' );
+                       }
+                       sio_out(up, TXX9_SITFIFO, (u32)ch );
+
+                       break;
+               }
+       }
+
+       return (1);
+}
+#endif /* CONFIG_KGDB */
+
+
+/******************************************************************************/
+/* END: KDBG Routines                                                         */
+/******************************************************************************/
+
 static int __init serial_txx9_init(void)
 {
        int ret;
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/drivers/serial/sh-sci.c linux-2.6.18-53.1.14.kgdb/drivers/serial/sh-sci.c
--- linux-2.6.18-53.1.14/drivers/serial/sh-sci.c        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/drivers/serial/sh-sci.c   2008-06-10 15:38:50.000000000 +0400
@@ -42,6 +42,7 @@
 #include <linux/console.h>
 #include <linux/bitops.h>
 #include <linux/generic_serial.h>
+#include <linux/kgdb.h>
 
 #ifdef CONFIG_CPU_FREQ
 #include <linux/notifier.h>
@@ -67,14 +68,16 @@
 
 #include "sh-sci.h"
 
-#ifdef CONFIG_SH_KGDB
-#include <asm/kgdb.h>
-
-static int kgdb_get_char(struct sci_port *port);
-static void kgdb_put_char(struct sci_port *port, char c);
-static void kgdb_handle_error(struct sci_port *port);
-static struct sci_port *kgdb_sci_port;
-#endif /* CONFIG_SH_KGDB */
+#ifdef CONFIG_KGDB_SH_SCI
+/* Speed of the UART. */
+static int kgdbsci_baud = CONFIG_KGDB_BAUDRATE
+
+/* Index of the UART, matches ttySCX naming. */
+static int kgdbsci_ttySC = CONFIG_KGDB_PORT_NUM;
+
+/* Make life easier on us. */
+#define KGDBPORT       sci_ports[kgdbsci_ttySC]
+#endif /* CONFIG_KGDB_SH_SCI */
 
 #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
 static struct sci_port *serial_console_port = 0;
@@ -87,20 +90,17 @@ static void sci_start_rx(struct uart_por
 static void sci_stop_rx(struct uart_port *port);
 static int sci_request_irq(struct sci_port *port);
 static void sci_free_irq(struct sci_port *port);
+static void sci_set_termios(struct uart_port *port, struct termios *termios,
+                       struct termios *old);
+static int kgdbsci_init(void);
 
 static struct sci_port sci_ports[];
 static struct uart_driver sci_uart_driver;
 
 #define SCI_NPORTS sci_uart_driver.nr
 
-#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB)
-
-static void handle_error(struct uart_port *port)
-{                              /* Clear error flags */
-       sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
-}
-
-static int get_char(struct uart_port *port)
+#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_KGDB_SH_SCI)
+static int get_char_for_gdb(struct uart_port *port)
 {
        unsigned long flags;
        unsigned short status;
@@ -110,7 +110,8 @@ static int get_char(struct uart_port *po
         do {
                status = sci_in(port, SCxSR);
                if (status & SCxSR_ERRORS(port)) {
-                       handle_error(port);
+                       /* Clear error flags. */
+                       sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));
                        continue;
                }
        } while (!(status & SCxSR_RDxF(port)));
@@ -121,21 +122,7 @@ static int get_char(struct uart_port *po
 
        return c;
 }
-
-/* Taken from sh-stub.c of GDB 4.18 */
-static const char hexchars[] = "0123456789abcdef";
-
-static __inline__ char highhex(int  x)
-{
-       return hexchars[(x >> 4) & 0xf];
-}
-
-static __inline__ char lowhex(int  x)
-{
-       return hexchars[x & 0xf];
-}
-
-#endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */
+#endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_KGDB_SH_SCI */
 
 /*
  * Send the packet in buffer.  The host gets one chance to read it.
@@ -167,21 +154,14 @@ static void put_string(struct sci_port *
        const unsigned char *p = buffer;
        int i;
 
-#if defined(CONFIG_SH_STANDARD_BIOS) || defined(CONFIG_SH_KGDB)
+#ifdef CONFIG_SH_STANDARD_BIOS
        int checksum;
-       int usegdb=0;
+        const char hexchars[] = "0123456789abcdef";
 
-#ifdef CONFIG_SH_STANDARD_BIOS
        /* This call only does a trap the first time it is
         * called, and so is safe to do here unconditionally
         */
-       usegdb |= sh_bios_in_gdb_mode();
-#endif
-#ifdef CONFIG_SH_KGDB
-       usegdb |= (kgdb_in_gdb_mode && (port == kgdb_sci_port));
-#endif
-
-       if (usegdb) {
+       if (sh_bios_in_gdb_mode()) {
            /*  $<packet info>#<checksum>. */
            do {
                unsigned char c;
@@ -193,18 +173,18 @@ static void put_string(struct sci_port *
                        int h, l;
 
                        c = *p++;
-                       h = highhex(c);
-                       l = lowhex(c);
+                       h = hexchars[c >> 4];
+                       l = hexchars[c % 16];
                        put_char(port, h);
                        put_char(port, l);
                        checksum += h + l;
                }
                put_char(port, '#');
-               put_char(port, highhex(checksum));
-               put_char(port, lowhex(checksum));
+               put_char(port, hexchars[checksum >> 4]);
+               put_char(port, hexchars[checksum % 16]);
            } while  (get_char(port) != '+');
        } else
-#endif /* CONFIG_SH_STANDARD_BIOS || CONFIG_SH_KGDB */
+#endif /* CONFIG_SH_STANDARD_BIOS */
        for (i=0; i<count; i++) {
                if (*p == 10)
                        put_char(port, '\r');
@@ -214,90 +194,163 @@ static void put_string(struct sci_port *
 #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
 
 
-#ifdef CONFIG_SH_KGDB
-
-/* Is the SCI ready, ie is there a char waiting? */
-static int kgdb_is_char_ready(struct sci_port *port)
+#ifdef CONFIG_KGDB_SH_SCI
+static int kgdbsci_read_char(void)
 {
-        unsigned short status = sci_in(port, SCxSR);
-
-        if (status & (SCxSR_ERRORS(port) | SCxSR_BRK(port)))
-                kgdb_handle_error(port);
-
-        return (status & SCxSR_RDxF(port));
+       return get_char_for_gdb(&KGDBPORT.port);
 }
 
-/* Write a char */
-static void kgdb_put_char(struct sci_port *port, char c)
+/* Called from kgdbstub.c to put a character, just a wrapper */
+static void kgdbsci_write_char(int c)
 {
         unsigned short status;
 
         do
-                status = sci_in(port, SCxSR);
-        while (!(status & SCxSR_TDxE(port)));
+               status = sci_in(&KGDBPORT.port, SCxSR);
+       while (!(status & SCxSR_TDxE(&KGDBPORT.port)));
 
-        sci_out(port, SCxTDR, c);
-        sci_in(port, SCxSR);    /* Dummy read */
-        sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port));
+       sci_out(&KGDBPORT.port, SCxTDR, c);
+       sci_in(&KGDBPORT.port, SCxSR);  /* Dummy read */
+       sci_out(&KGDBPORT.port, SCxSR, SCxSR_TDxE_CLEAR(&KGDBPORT.port));
 }
 
-/* Get a char if there is one, else ret -1 */
-static int kgdb_get_char(struct sci_port *port)
+#ifndef CONFIG_SERIAL_SH_SCI_CONSOLE
+/* If we don't have console, we never hookup IRQs.  But we need to
+ * hookup one so that we can interrupt the system.
+ */
+static irqreturn_t kgdbsci_rx_interrupt(int irq, void *ptr,
+               struct pt_regs *regs)
 {
-        int c;
+       struct uart_port *port = ptr;
 
-        if (kgdb_is_char_ready(port) == 0)
-                c = -1;
-        else {
-                c = sci_in(port, SCxRDR);
-                sci_in(port, SCxSR);    /* Dummy read */
+       if (!(sci_in(port, SCxSR) & SCxSR_RDxF(port)))
+               return IRQ_NONE;
+
+       if (kgdb_io_ops.init != kgdbsci_init) {
+               /* Throw away the data if another I/O routine is active */
+               get_char_for_gdb(&KGDBPORT.port);
+       } else
+               /* We've got an interrupt, so go ahead and call breakpoint() */
+               breakpoint();
+
+       sci_in(port, SCxSR); /* dummy read */
                 sci_out(port, SCxSR, SCxSR_RDxF_CLEAR(port));
-        }
 
-        return c;
+       return IRQ_HANDLED;
 }
 
-/* Called from kgdbstub.c to get a character, i.e. is blocking */
-static int kgdb_sci_getchar(void)
+static irqreturn_t kgdbsci_mpxed_interrupt(int irq, void *ptr,
+               struct pt_regs *regs)
 {
-        volatile int c;
-
-        /* Keep trying to read a character, this could be neater */
-        while ((c = kgdb_get_char(kgdb_sci_port)) < 0);
+        unsigned short ssr_status, scr_status;
+        struct uart_port *port = ptr;
 
-        return c;
-}
+        ssr_status = sci_in(port,SCxSR);
+        scr_status = sci_in(port,SCSCR);
 
-/* Called from kgdbstub.c to put a character, just a wrapper */
-static void kgdb_sci_putchar(int c)
-{
+       /* Rx Interrupt */
+        if ((ssr_status&0x0002) && (scr_status&0x0040))
+               kgdbsci_rx_interrupt(irq, ptr, regs);
 
-        kgdb_put_char(kgdb_sci_port, c);
+       return IRQ_HANDLED;
 }
 
-/* Clear any errors on the SCI */
-static void kgdb_handle_error(struct sci_port *port)
+static void __init kgdbsci_lateinit(void)
 {
-        sci_out(port, SCxSR, SCxSR_ERROR_CLEAR(port));  /* Clear error flags */
+       if (KGDBPORT.irqs[0] == KGDBPORT.irqs[1]) {
+               if (!KGDBPORT.irqs[0]) {
+                       printk(KERN_ERR "kgdbsci: Cannot allocate irq.\n");
+                       return;
+               }
+               if (request_irq(KGDBPORT.irqs[0], kgdbsci_mpxed_interrupt,
+                                       SA_INTERRUPT, "kgdbsci",
+                                       &KGDBPORT.port)) {
+                       printk(KERN_ERR "kgdbsci: Cannot allocate irq.\n");
+                       return;
+               }
+       } else {
+               if (KGDBPORT.irqs[1])
+                       request_irq(KGDBPORT.irqs[1],
+                                       kgdbsci_rx_interrupt, SA_INTERRUPT,
+                                       "kgdbsci", &KGDBPORT.port);
+       }
 }
+#endif
 
-/* Breakpoint if there's a break sent on the serial port */
-static void kgdb_break_interrupt(int irq, void *ptr, struct pt_regs *regs)
+/*
+ * We use the normal init routine to setup the port, so we can't be
+ * in here too early.
+ */
+static int kgdbsci_init(void)
 {
-        struct sci_port *port = ptr;
-        unsigned short status = sci_in(port, SCxSR);
-
-        if (status & SCxSR_BRK(port)) {
+       struct termios termios;
 
-                /* Break into the debugger if a break is detected */
-                BREAKPOINT();
+       memset(&termios, 0, sizeof(struct termios));
 
-                /* Clear */
-                sci_out(port, SCxSR, SCxSR_BREAK_CLEAR(port));
+       termios.c_cflag = CREAD | HUPCL | CLOCAL | CS8;
+       switch (kgdbsci_baud) {
+       case 9600:
+               termios.c_cflag |= B9600;
+               break;
+       case 19200:
+               termios.c_cflag |= B19200;
+               break;
+       case 38400:
+               termios.c_cflag |= B38400;
+               break;
+       case 57600:
+               termios.c_cflag |= B57600;
+               break;
+       case 115200:
+               termios.c_cflag |= B115200;
+               break;
         }
+       sci_set_termios(&KGDBPORT.port, &termios, NULL);
+
+       return 0;
 }
 
-#endif /* CONFIG_SH_KGDB */
+struct kgdb_io kgdb_io_ops = {
+       .read_char = kgdbsci_read_char,
+       .write_char = kgdbsci_write_char,
+       .init = kgdbsci_init,
+#ifndef CONFIG_SERIAL_SH_SCI_CONSOLE
+       .late_init = kgdbsci_lateinit,
+#else /* ! CONFIG_SERIAL_SH_SCI_CONSOLE */
+       .late_init = NULL,
+#endif /* ! CONFIG_SERIAL_SH_SCI_CONSOLE */
+       .pre_exception = NULL,
+       .post_exception = NULL
+};
+
+/*
+ * Syntax for this cmdline option is "kgdbsci=ttyno,baudrate".
+ */
+static int __init
+kgdbsci_opt(char *str)
+{
+       /* We might have anywhere from 1 to 3 ports. */
+       if (*str < '0' || *str > SCI_NPORTS + '0')
+                goto errout;
+       kgdbsci_ttySC = *str - '0';
+       str++;
+       if (*str != ',')
+                goto errout;
+       str++;
+       kgdbsci_baud = simple_strtoul(str, &str, 10);
+       if (kgdbsci_baud != 9600 && kgdbsci_baud != 19200 &&
+           kgdbsci_baud != 38400 && kgdbsci_baud != 57600 &&
+           kgdbsci_baud != 115200)
+                goto errout;
+
+       return 0;
+
+errout:
+       printk(KERN_ERR "Invalid syntax for option kgdbsci=\n");
+       return 1;
+}
+__setup("kgdbsci", kgdbsci_opt);
+#endif /* CONFIG_KGDB_SH_SCI */
 
 #if defined(__H8300S__)
 enum { sci_disable, sci_enable };
@@ -555,6 +608,16 @@ static inline void sci_receive_chars(str
                                        continue;
                                }
 
+#ifdef CONFIG_KGDB_SH_SCI
+                               /* We assume that a ^C on the port KGDB
+                                * is using means that KGDB wants to
+                                * interrupt the running system.
+                                */
+                               if (port->line == KGDBPORT.port.line &&
+                                               c == 3)
+                                       breakpoint();
+#endif
+
                                /* Store data and status */
                                if (status&SCxSR_FER(port)) {
                                        flag = TTY_FRAME;
@@ -1618,6 +1681,7 @@ static int __init sci_console_init(void)
 console_initcall(sci_console_init);
 #endif /* CONFIG_SERIAL_SH_SCI_CONSOLE */
 
+#if 0
 #ifdef CONFIG_SH_KGDB
 /*
  * FIXME: Most of this can go away.. at the moment, we rely on
@@ -1663,30 +1727,9 @@ int __init kgdb_console_setup(struct con
        return uart_set_options(port, co, baud, parity, bits, flow);
 }
 #endif /* CONFIG_SH_KGDB */
+#endif /* 0 */
 
-#ifdef CONFIG_SH_KGDB_CONSOLE
-static struct console kgdb_console = {
-        .name          = "ttySC",
-        .write         = kgdb_console_write,
-        .setup         = kgdb_console_setup,
-        .flags         = CON_PRINTBUFFER | CON_ENABLED,
-        .index         = -1,
-       .data           = &sci_uart_driver,
-};
-
-/* Register the KGDB console so we get messages (d'oh!) */
-static int __init kgdb_console_init(void)
-{
-       register_console(&kgdb_console);
-       return 0;
-}
-
-console_initcall(kgdb_console_init);
-#endif /* CONFIG_SH_KGDB_CONSOLE */
-
-#if defined(CONFIG_SH_KGDB_CONSOLE)
-#define SCI_CONSOLE    &kgdb_console
-#elif defined(CONFIG_SERIAL_SH_SCI_CONSOLE)
+#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
 #define SCI_CONSOLE    &serial_console
 #else
 #define SCI_CONSOLE    0
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-arm/kgdb.h linux-2.6.18-53.1.14.kgdb/include/asm-arm/kgdb.h
--- linux-2.6.18-53.1.14/include/asm-arm/kgdb.h 1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/asm-arm/kgdb.h    2008-06-10 15:39:01.000000000 +0400
@@ -0,0 +1,92 @@
+/*
+ * include/asm-arm/kgdb.h
+ *
+ * ARM KGDB support
+ *
+ * Author: Deepak Saxena <dsaxena@mvista.com>
+ *
+ * Copyright (C) 2002 MontaVista Software Inc.
+ *
+ */
+
+#ifndef __ASM_KGDB_H__
+#define __ASM_KGDB_H__
+
+#include <linux/config.h>
+#include <asm/ptrace.h>
+#include <asm-generic/kgdb.h>
+
+
+/*
+ * GDB assumes that we're a user process being debugged, so
+ * it will send us an SWI command to write into memory as the
+ * debug trap. When an SWI occurs, the next instruction addr is
+ * placed into R14_svc before jumping to the vector trap.
+ * This doesn't work for kernel debugging as we are already in SVC
+ * we would loose the kernel's LR, which is a bad thing. This
+ * is  bad thing.
+ *
+ * By doing this as an undefined instruction trap, we force a mode
+ * switch from SVC to UND mode, allowing us to save full kernel state.
+ *
+ * We also define a KGDB_COMPILED_BREAK which can be used to compile
+ * in breakpoints. This is important for things like sysrq-G and for
+ * the initial breakpoint from trap_init().
+ *
+ * Note to ARM HW designers: Add real trap support like SH && PPC to
+ * make our lives much much simpler. :)
+ */
+#define        BREAK_INSTR_SIZE                4
+#define GDB_BREAKINST                   0xef9f0001
+#define KGDB_BREAKINST                  0xe7ffdefe
+#define KGDB_COMPILED_BREAK             0xe7ffdeff
+#define CACHE_FLUSH_IS_SAFE            1
+
+#ifndef        __ASSEMBLY__
+
+#define        BREAKPOINT()                    asm(".word      0xe7ffdeff")
+
+
+extern void kgdb_handle_bus_error(void);
+extern int kgdb_fault_expected;
+#endif /* !__ASSEMBLY__ */
+
+/*
+ * From Amit S. Kale:
+ *
+ * In the register packet, words 0-15 are R0 to R10, FP, IP, SP, LR, PC. But
+ * Register 16 isn't cpsr. GDB passes CPSR in word 25. There are 9 words in
+ * between which are unused. Passing only 26 words to gdb is sufficient.
+ * GDB can figure out that floating point registers are not passed.
+ * GDB_MAX_REGS should be 26.
+ */
+#define        GDB_MAX_REGS            (26)
+
+#define        KGDB_MAX_NO_CPUS        1
+#define        BUFMAX                  400
+#define        NUMREGBYTES             (GDB_MAX_REGS << 2)
+#define        NUMCRITREGBYTES         (32 << 2)
+
+#define        _R0             0
+#define        _R1             1
+#define        _R2             2
+#define        _R3             3
+#define        _R4             4
+#define        _R5             5
+#define        _R6             6
+#define        _R7             7
+#define        _R8             8
+#define        _R9             9
+#define        _R10            10
+#define        _FP             11
+#define        _IP             12
+#define        _SP             13
+#define        _LR             14
+#define        _PC             15
+#define        _CPSR           (GDB_MAX_REGS - 1)
+
+/* So that we can denote the end of a frame for tracing, in the simple
+ * case. */
+#define CFI_END_FRAME(func)    __CFI_END_FRAME(_PC,_SP,func)
+
+#endif /* __ASM_KGDB_H__ */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-arm/system.h linux-2.6.18-53.1.14.kgdb/include/asm-arm/system.h
--- linux-2.6.18-53.1.14/include/asm-arm/system.h       2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/asm-arm/system.h  2008-06-10 15:38:56.000000000 +0400
@@ -444,6 +444,47 @@ static inline unsigned long __xchg(unsig
 extern void disable_hlt(void);
 extern void enable_hlt(void);
 
+#define        __HAVE_ARCH_CMPXCHG     1
+
+#include <asm/types.h>
+
+static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old,
+                                       unsigned long new)
+{
+       u32 retval;
+       unsigned long flags;
+
+       local_irq_save(flags);
+       retval = *m;
+       if (retval == old)
+               *m = new;
+       local_irq_restore(flags);       /* implies memory barrier  */
+
+       return retval;
+}
+
+/* This function doesn't exist, so you'll get a linker error
+   if something tries to do an invalid cmpxchg().  */
+extern void __cmpxchg_called_with_bad_pointer(void);
+
+static inline unsigned long __cmpxchg(volatile void * ptr, unsigned long old,
+       unsigned long new, int size)
+{
+       switch (size) {
+       case 4:
+               return __cmpxchg_u32(ptr, old, new);
+       }
+       __cmpxchg_called_with_bad_pointer();
+       return old;
+}
+
+#define cmpxchg(ptr,o,n)                                                \
+  ({                                                                    \
+     __typeof__(*(ptr)) _o_ = (o);                                      \
+     __typeof__(*(ptr)) _n_ = (n);                                      \
+     (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,          \
+                                   (unsigned long)_n_, sizeof(*(ptr))); \
+  })
 #endif /* __ASSEMBLY__ */
 
 #define arch_align_stack(x) (x)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-generic/kgdb.h linux-2.6.18-53.1.14.kgdb/include/asm-generic/kgdb.h
--- linux-2.6.18-53.1.14/include/asm-generic/kgdb.h     1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/asm-generic/kgdb.h        2008-06-10 15:39:01.000000000 +0400
@@ -0,0 +1,34 @@
+/*
+ * include/asm-generic/kgdb.h
+ *
+ * This provides the assembly level information so that KGDB can provide
+ * a GDB that has been patched with enough information to know to stop
+ * trying to unwind the function.
+ *
+ * Author: Tom Rini <trini@kernel.crashing.org>
+ *
+ * 2005 (c) MontaVista Software, Inc. This file is licensed under the terms
+ * of the GNU General Public License version 2. This program is licensed
+ * "as is" without any warranty of any kind, whether express or implied.
+ */
+
+#ifndef __ASM_GENERIC_KGDB_H__
+#define __ASM_GENERIC_KGDB_H__
+
+#include <linux/dwarf2-lang.h>
+#ifdef __ASSEMBLY__
+#ifdef CONFIG_KGDB
+/* This MUST be put at the end of a given assembly function */
+#define __CFI_END_FRAME(pc,sp,func)                    \
+CAT3(.Lend_,func,:)                                    \
+       CFI_preamble(func,pc,0x1,-DATA_ALIGN_FACTOR)    \
+       CFA_define_reference(sp, 0)                     \
+       CFA_undefine_reg(pc)                            \
+       CFI_postamble()                                 \
+       FDE_preamble(func,func,CAT3(.Lend,_,func))      \
+       FDE_postamble()
+#else
+#define __CFI_END_FRAME(pc,sp,fn)
+#endif                         /* CONFIG_KGDB */
+#endif                         /* __ASSEMBLY__ */
+#endif                         /* __ASM_GENERIC_KGDB_H__ */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-i386/kdebug.h linux-2.6.18-53.1.14.kgdb/include/asm-i386/kdebug.h
--- linux-2.6.18-53.1.14/include/asm-i386/kdebug.h      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/asm-i386/kdebug.h 2008-06-10 15:38:03.000000000 +0400
@@ -39,6 +39,7 @@ enum die_val {
        DIE_CALL,
        DIE_NMI_IPI,
        DIE_PAGE_FAULT,
+       DIE_PAGE_FAULT_NO_CONTEXT,
 };
 
 static inline int notify_die(enum die_val val, const char *str,
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-i386/kgdb.h linux-2.6.18-53.1.14.kgdb/include/asm-i386/kgdb.h
--- linux-2.6.18-53.1.14/include/asm-i386/kgdb.h        1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/asm-i386/kgdb.h   2008-06-10 15:39:01.000000000 +0400
@@ -0,0 +1,58 @@
+#ifdef __KERNEL__
+#ifndef _ASM_KGDB_H_
+#define _ASM_KGDB_H_
+
+/*
+ * Copyright (C) 2001-2004 Amit S. Kale
+ */
+
+#include <asm-generic/kgdb.h>
+
+/*
+ *  Note that this register image is in a different order than
+ *  the register image that Linux produces at interrupt time.
+ *
+ *  Linux's register image is defined by struct pt_regs in ptrace.h.
+ *  Just why GDB uses a different order is a historical mystery.
+ */
+#define _EAX   0
+#define _ECX   1
+#define _EDX   2
+#define _EBX   3
+#define _ESP   4
+#define _EBP   5
+#define _ESI   6
+#define _EDI   7
+#define _PC    8
+#define _EIP   8
+#define _PS    9
+#define _EFLAGS        9
+#define _CS    10
+#define _SS    11
+#define _DS    12
+#define _ES    13
+#define _FS    14
+#define _GS    15
+
+/* So that we can denote the end of a frame for tracing, in the simple
+ * case. */
+#define CFI_END_FRAME(func)    __CFI_END_FRAME(_EIP,_ESP,func)
+
+#ifndef __ASSEMBLY__
+/************************************************************************/
+/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/
+/* at least NUMREGBYTES*2 are needed for register packets */
+/* Longer buffer is needed to list all threads */
+#define BUFMAX                 1024
+
+/* Number of bytes of registers.  */
+#define NUMREGBYTES            64
+/* Number of bytes of registers we need to save for a setjmp/longjmp. */
+#define NUMCRITREGBYTES                24
+
+#define BREAKPOINT()           asm("   int $3");
+#define BREAK_INSTR_SIZE       1
+#define CACHE_FLUSH_IS_SAFE    1
+#endif                         /* !__ASSEMBLY__ */
+#endif                         /* _ASM_KGDB_H_ */
+#endif                         /* __KERNEL__ */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-ia64/kdebug.h linux-2.6.18-53.1.14.kgdb/include/asm-ia64/kdebug.h
--- linux-2.6.18-53.1.14/include/asm-ia64/kdebug.h      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/asm-ia64/kdebug.h 2008-06-10 15:38:32.000000000 +0400
@@ -72,6 +72,7 @@ enum die_val {
        DIE_KDEBUG_LEAVE,
        DIE_KDUMP_ENTER,
        DIE_KDUMP_LEAVE,
+       DIE_PAGE_FAULT_NO_CONTEXT,
 };
 
 static inline int notify_die(enum die_val val, char *str, struct pt_regs *regs,
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-ia64/kgdb.h linux-2.6.18-53.1.14.kgdb/include/asm-ia64/kgdb.h
--- linux-2.6.18-53.1.14/include/asm-ia64/kgdb.h        1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/asm-ia64/kgdb.h   2008-06-10 15:38:32.000000000 +0400
@@ -0,0 +1,36 @@
+#ifdef __KERNEL__
+#ifndef _ASM_KGDB_H_
+#define _ASM_KGDB_H_
+
+/*
+ * Copyright (C) 2001-2004 Amit S. Kale
+ */
+
+#include <linux/threads.h>
+
+/************************************************************************/
+/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/
+/* at least NUMREGBYTES*2 are needed for register packets */
+/* Longer buffer is needed to list all threads */
+#define BUFMAX                 1024
+
+/* Number of bytes of registers.  We set this to 0 so that certain GDB
+ * packets will fail, forcing the use of others, which are more friendly
+ * on ia64. */
+#define NUMREGBYTES            0
+
+#define NUMCRITREGBYTES                (70*8)
+#define JMP_REGS_ALIGNMENT     __attribute__ ((aligned (16)))
+
+#define BREAKNUM               0x00003333300LL
+#define KGDBBREAKNUM           0x6665UL
+#define BREAKPOINT()           asm volatile ("break.m 0x6665")
+#define BREAK_INSTR_SIZE       16
+#define CACHE_FLUSH_IS_SAFE    1
+
+struct pt_regs;
+extern volatile int kgdb_hwbreak_sstep[NR_CPUS];
+extern void smp_send_nmi_allbutself(void);
+extern void kgdb_wait_ipi(struct pt_regs *);
+#endif                         /* _ASM_KGDB_H_ */
+#endif                         /* __KERNEL__ */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-mips/kdebug.h linux-2.6.18-53.1.14.kgdb/include/asm-mips/kdebug.h
--- linux-2.6.18-53.1.14/include/asm-mips/kdebug.h      1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/asm-mips/kdebug.h 2008-06-10 15:38:24.000000000 +0400
@@ -0,0 +1,47 @@
+/*
+ *
+ * Copyright (C) 2004  MontaVista Software Inc.
+ * Author: Manish Lachwani, mlachwani@mvista.com or manish@koffee-break.com
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ */
+#ifndef _MIPS_KDEBUG_H
+#define _MIPS_KDEBUG_H
+
+#include <linux/notifier.h>
+
+struct pt_regs;
+
+struct die_args {
+       struct pt_regs *regs;
+       const char *str;
+       long err;
+};
+
+int register_die_notifier(struct notifier_block *nb);
+extern struct notifier_block *mips_die_chain;
+
+enum die_val {
+       DIE_OOPS = 1,
+       DIE_PANIC,
+       DIE_DIE,
+       DIE_KERNELDEBUG,
+       DIE_TRAP,
+       DIE_PAGE_FAULT,
+};
+
+/*
+ * trap number can be computed from regs and signr can be computed using
+ * compute_signal()
+ */
+static inline int notify_die(enum die_val val,char *str,struct pt_regs *regs,long err)
+{
+       struct die_args args = { .regs=regs, .str=str, .err=err };
+       return notifier_call_chain(&mips_die_chain, val, &args);
+}
+
+#endif /* _MIPS_KDEBUG_H */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-mips/kgdb.h linux-2.6.18-53.1.14.kgdb/include/asm-mips/kgdb.h
--- linux-2.6.18-53.1.14/include/asm-mips/kgdb.h        1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/asm-mips/kgdb.h   2008-06-10 15:39:01.000000000 +0400
@@ -0,0 +1,34 @@
+#ifdef __KERNEL__
+#ifndef _ASM_KGDB_H_
+#define _ASM_KGDB_H_
+
+#ifndef __ASSEMBLY__
+#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2)
+typedef u32 gdb_reg_t;
+#elif (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4)
+typedef u64 gdb_reg_t;
+#else
+#error need to do
+#endif /* _MIPS_ISA */
+
+#include <asm-generic/kgdb.h>
+
+#ifndef __ASSEMBLY__
+#define BUFMAX                 2048
+#define NUMREGBYTES            (90*sizeof(gdb_reg_t))
+#define NUMCRITREGBYTES                (12*sizeof(gdb_reg_t))
+#define BREAK_INSTR_SIZE       4
+#define BREAKPOINT()           __asm__ __volatile__(           \
+                                       ".globl breakinst\n\t"  \
+                                       ".set\tnoreorder\n\t"   \
+                                       "nop\n"                 \
+                                       "breakinst:\tbreak\n\t" \
+                                       "nop\n\t"               \
+                                       ".set\treorder")
+#define CACHE_FLUSH_IS_SAFE    0
+
+extern int kgdb_early_setup;
+
+#endif                         /* !__ASSEMBLY__ */
+#endif                         /* _ASM_KGDB_H_ */
+#endif                         /* __KERNEL__ */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-powerpc/kgdb.h linux-2.6.18-53.1.14.kgdb/include/asm-powerpc/kgdb.h
--- linux-2.6.18-53.1.14/include/asm-powerpc/kgdb.h     1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/asm-powerpc/kgdb.h        2008-06-10 15:39:01.000000000 +0400
@@ -0,0 +1,74 @@
+/*
+ * include/asm-powerpc/kgdb.h
+ *
+ * The PowerPC (32/64) specific defines / externs for KGDB.  Based on
+ * the previous 32bit and 64bit specific files, which had the following
+ * copyrights:
+ *
+ * PPC64 Mods (C) 2005 Frank Rowand (frowand@mvista.com)
+ * PPC Mods (C) 2004 Tom Rini (trini@mvista.com)
+ * PPC Mods (C) 2003 John Whitney (john.whitney@timesys.com)
+ * PPC Mods (C) 1998 Michael Tesch (tesch@cs.wisc.edu)
+ *
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ * Author: Tom Rini <trini@kernel.crashing.org>
+ *
+ * 2006 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+#ifdef __KERNEL__
+#ifndef __POWERPC_KGDB_H__
+#define __POWERPC_KGDB_H__
+
+#include <asm-generic/kgdb.h>
+#ifndef __ASSEMBLY__
+
+#define BREAK_INSTR_SIZE       4
+#define BUFMAX                 ((NUMREGBYTES * 2) + 512)
+#define OUTBUFMAX              ((NUMREGBYTES * 2) + 512)
+#define BREAKPOINT()           asm(".long 0x7d821008"); /* twge r2, r2 */
+#define CACHE_FLUSH_IS_SAFE    1
+
+/* The number bytes of registers we have to save depends on a few
+ * things.  For 64bit we default to not including vector registers and
+ * vector state registers. */
+#ifdef CONFIG_PPC64
+/*
+ * 64 bit (8 byte) registers:
+ *   32 gpr, 32 fpr, nip, msr, link, ctr
+ * 32 bit (4 byte) registers:
+ *   ccr, xer, fpscr
+ */
+#define NUMREGBYTES            ((68 * 8) + (3 * 4))
+#if 0
+/* The following adds in vector registers and vector state registers. */
+/* 128 bit (16 byte) registers:
+ *   32 vr
+ * 64 bit (8 byte) registers:
+ *   32 gpr, 32 fpr, nip, msr, link, ctr
+ * 32 bit (4 byte) registers:
+ *   ccr, xer, fpscr, vscr, vrsave
+ */
+#define NUMREGBYTES            ((128 * 16) + (68 * 8) + (5 * 4))
+#endif
+#define NUMCRITREGBYTES                184
+#else /* CONFIG_PPC32 */
+/* On non-E500 family PPC32 we determine the size by picking the last
+ * register we need, but on E500 we skip sections so we list what we
+ * need to store, and add it up. */
+#ifndef CONFIG_E500
+#define MAXREG                 (PT_FPSCR+1)
+#else
+/* 32 GPRs (8 bytes), nip, msr, ccr, link, ctr, xer, acc (8 bytes), spefscr*/
+#define MAXREG                 ((32*2)+6+2+1)
+#endif
+#define NUMREGBYTES            (MAXREG * sizeof(int))
+/* CR/LR, R1, R2, R13-R31 inclusive. */
+#define NUMCRITREGBYTES                (23 * sizeof(int))
+#endif /* 32/64 */
+#endif /* !(__ASSEMBLY__) */
+#endif /* !__POWERPC_KGDB_H__ */
+#endif /* __KERNEL__ */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-ppc/kgdb.h linux-2.6.18-53.1.14.kgdb/include/asm-ppc/kgdb.h
--- linux-2.6.18-53.1.14/include/asm-ppc/kgdb.h 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/asm-ppc/kgdb.h    2008-06-10 15:38:14.000000000 +0400
@@ -1,57 +1,18 @@
-/*
- * kgdb.h: Defines and declarations for serial line source level
- *         remote debugging of the Linux kernel using gdb.
- *
- * PPC Mods (C) 1998 Michael Tesch (tesch@cs.wisc.edu)
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- */
 #ifdef __KERNEL__
-#ifndef _PPC_KGDB_H
-#define _PPC_KGDB_H
-
+#ifndef __PPC_KGDB_H__
+#define __PPC_KGDB_H__
+#include <asm-powerpc/kgdb.h>
 #ifndef __ASSEMBLY__
-
-/* Things specific to the gen550 backend. */
-struct uart_port;
-
-extern void gen550_progress(char *, unsigned short);
-extern void gen550_kgdb_map_scc(void);
-extern void gen550_init(int, struct uart_port *);
-
-/* Things specific to the pmac backend. */
-extern void zs_kgdb_hook(int tty_num);
-
-/* To init the kgdb engine. (called by serial hook)*/
-extern void set_debug_traps(void);
-
-/* To enter the debugger explicitly. */
-extern void breakpoint(void);
-
-/* For taking exceptions
+ /* For taking exceptions
  * these are defined in traps.c
  */
-extern int (*debugger)(struct pt_regs *regs);
+struct pt_regs;
+extern void (*debugger)(struct pt_regs *regs);
 extern int (*debugger_bpt)(struct pt_regs *regs);
 extern int (*debugger_sstep)(struct pt_regs *regs);
 extern int (*debugger_iabr_match)(struct pt_regs *regs);
 extern int (*debugger_dabr_match)(struct pt_regs *regs);
 extern void (*debugger_fault_handler)(struct pt_regs *regs);
-
-/* What we bring to the party */
-int kgdb_bpt(struct pt_regs *regs);
-int kgdb_sstep(struct pt_regs *regs);
-void kgdb(struct pt_regs *regs);
-int kgdb_iabr_match(struct pt_regs *regs);
-int kgdb_dabr_match(struct pt_regs *regs);
-
-/*
- * external low-level support routines (ie macserial.c)
- */
-extern void kgdb_interruptible(int); /* control interrupts from serial */
-extern void putDebugChar(char);   /* write a single character      */
-extern char getDebugChar(void);   /* read and return a single char */
-
-#endif /* !(__ASSEMBLY__) */
-#endif /* !(_PPC_KGDB_H) */
+#endif /* !__ASSEMBLY__ */
+#endif /* __PPC_KGDB_H__ */
 #endif /* __KERNEL__ */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-ppc/machdep.h linux-2.6.18-53.1.14.kgdb/include/asm-ppc/machdep.h
--- linux-2.6.18-53.1.14/include/asm-ppc/machdep.h      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/asm-ppc/machdep.h 2008-06-10 15:38:14.000000000 +0400
@@ -72,9 +72,7 @@ struct machdep_calls {
        unsigned long   (*find_end_of_memory)(void);
        void            (*setup_io_mappings)(void);
 
-       void            (*early_serial_map)(void);
        void            (*progress)(char *, unsigned short);
-       void            (*kgdb_map_scc)(void);
 
        unsigned char   (*nvram_read_val)(int addr);
        void            (*nvram_write_val)(int addr, unsigned char val);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-ppc/mv64x60.h linux-2.6.18-53.1.14.kgdb/include/asm-ppc/mv64x60.h
--- linux-2.6.18-53.1.14/include/asm-ppc/mv64x60.h      2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/asm-ppc/mv64x60.h 2008-06-10 15:38:14.000000000 +0400
@@ -348,6 +348,8 @@ u32 mv64x60_calc_mem_size(struct mv64x60
 
 void mv64x60_progress_init(u32 base);
 void mv64x60_mpsc_progress(char *s, unsigned short hex);
+struct platform_device * mv64x60_early_get_pdev_data(const char *name,
+               int id, int remove);
 
 extern struct mv64x60_32bit_window
        gt64260_32bit_windows[MV64x60_32BIT_WIN_COUNT];
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-ppc/mv64x60_defs.h linux-2.6.18-53.1.14.kgdb/include/asm-ppc/mv64x60_defs.h
--- linux-2.6.18-53.1.14/include/asm-ppc/mv64x60_defs.h 2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/asm-ppc/mv64x60_defs.h    2008-06-10 15:38:14.000000000 +0400
@@ -57,7 +57,8 @@
 #define        MV64x60_IRQ_I2C                         37
 #define        MV64x60_IRQ_BRG                         39
 #define        MV64x60_IRQ_MPSC_0                      40
-#define        MV64x60_IRQ_MPSC_1                      42
+#define        MV64360_IRQ_MPSC_1                      41
+#define        GT64260_IRQ_MPSC_1                      42
 #define        MV64x60_IRQ_COMM                        43
 #define        MV64x60_IRQ_P0_GPP_0_7                  56
 #define        MV64x60_IRQ_P0_GPP_8_15                 57
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-sh/kgdb.h linux-2.6.18-53.1.14.kgdb/include/asm-sh/kgdb.h
--- linux-2.6.18-53.1.14/include/asm-sh/kgdb.h  2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/asm-sh/kgdb.h     2008-06-10 15:39:01.000000000 +0400
@@ -2,94 +2,40 @@
  * May be copied or modified under the terms of the GNU General Public
  * License.  See linux/COPYING for more information.
  *
- * Based on original code by Glenn Engel, Jim Kingdon,
- * David Grothe <dave@gcom.com>, Tigran Aivazian, <tigran@sco.com> and
- * Amit S. Kale <akale@veritas.com>
+ * Based on a file that was modified or based on files by: Glenn Engel,
+ * Jim Kingdon, David Grothe <dave@gcom.com>, Tigran Aivazian <tigran@sco.com>,
+ * Amit S. Kale <akale@veritas.com>, sh-stub.c from Ben Lee and
+ * Steve Chamberlain, Henry Bell <henry.bell@st.com>
  * 
- * Super-H port based on sh-stub.c (Ben Lee and Steve Chamberlain) by
- * Henry Bell <henry.bell@st.com>
- * 
- * Header file for low-level support for remote debug using GDB. 
+ * Maintainer: Tom Rini <trini@kernel.crashing.org>
  *
  */
 
 #ifndef __KGDB_H
 #define __KGDB_H
 
-#include <asm/ptrace.h>
-
-struct console;
+#include <asm-generic/kgdb.h>
+/* Based on sh-gdb.c from gdb-6.1, Glenn
+     Engel at HP  Ben Lee and Steve Chamberlain */
+#define NUMREGBYTES    112     /* 92 */
+#define NUMCRITREGBYTES        (9 << 2)
+#define BUFMAX         400
 
-/* Same as pt_regs but has vbr in place of syscall_nr */
+#ifndef __ASSEMBLY__
 struct kgdb_regs {
         unsigned long regs[16];
         unsigned long pc;
         unsigned long pr;
-        unsigned long sr;
         unsigned long gbr;
+        unsigned long vbr;
         unsigned long mach;
         unsigned long macl;
-        unsigned long vbr;
-};
-
-/* State info */
-extern char kgdb_in_gdb_mode;
-extern int kgdb_done_init;
-extern int kgdb_enabled;
-extern int kgdb_nofault;       /* Ignore bus errors (in gdb mem access) */
-extern int kgdb_halt;          /* Execute initial breakpoint at startup */
-extern char in_nmi;            /* Debounce flag to prevent NMI reentry*/
-
-/* SCI */
-extern int kgdb_portnum;
-extern int kgdb_baud;
-extern char kgdb_parity;
-extern char kgdb_bits;
-extern int kgdb_console_setup(struct console *, char *);
-
-/* Init and interface stuff */
-extern int kgdb_init(void);
-extern int (*kgdb_serial_setup)(void);
-extern int (*kgdb_getchar)(void);
-extern void (*kgdb_putchar)(int);
-
-struct kgdb_sermap {
-       char *name;
-       int namelen;
-       int (*setup_fn)(struct console *, char *);
-       struct kgdb_sermap *next;
+        unsigned long sr;
 };
-extern void kgdb_register_sermap(struct kgdb_sermap *map);
-extern struct kgdb_sermap *kgdb_porttype;
 
-/* Trap functions */
-typedef void (kgdb_debug_hook_t)(struct pt_regs *regs); 
-typedef void (kgdb_bus_error_hook_t)(void);
-extern kgdb_debug_hook_t  *kgdb_debug_hook;
-extern kgdb_bus_error_hook_t *kgdb_bus_err_hook;
-
-extern void breakpoint(void);
-
-/* Console */
-struct console;
-void kgdb_console_write(struct console *co, const char *s, unsigned count);
-void kgdb_console_init(void);
-
-/* Prototypes for jmp fns */
-#define _JBLEN 9
-typedef        int jmp_buf[_JBLEN];
-extern void    longjmp(jmp_buf __jmpb, int __retval);
-extern int     setjmp(jmp_buf __jmpb);
-
-/* Variadic macro to print our own message to the console */
-#define KGDB_PRINTK(...) printk("KGDB: " __VA_ARGS__)
-
-/* Forced breakpoint */
-#define BREAKPOINT() do {                                     \
-  if (kgdb_enabled) {                                         \
-    asm volatile("trapa   #0xff");                            \
-  }                                                           \
-} while (0)
+#define BREAKPOINT()           asm("trapa #0xff");
+#define BREAK_INSTR_SIZE       2
+#define CACHE_FLUSH_IS_SAFE    1
 
 /* KGDB should be able to flush all kernel text space */
 #if defined(CONFIG_CPU_SH4)
@@ -102,30 +48,5 @@ extern int     setjmp(jmp_buf __jmpb);
 #else
 #define kgdb_flush_icache_range(start, end)    do { } while (0)
 #endif
-
-/* Kernel assert macros */
-#ifdef CONFIG_KGDB_KERNEL_ASSERTS
-
-/* Predefined conditions */
-#define KA_VALID_ERRNO(errno) ((errno) > 0 && (errno) <= EMEDIUMTYPE)
-#define KA_VALID_PTR_ERR(ptr) KA_VALID_ERRNO(-PTR_ERR(ptr))
-#define KA_VALID_KPTR(ptr)  (!(ptr) || \
-              ((void *)(ptr) >= (void *)PAGE_OFFSET &&  \
-               (void *)(ptr) < ERR_PTR(-EMEDIUMTYPE)))
-#define KA_VALID_PTRORERR(errptr) \
-               (KA_VALID_KPTR(errptr) || KA_VALID_PTR_ERR(errptr))
-#define KA_HELD_GKL()  (current->lock_depth >= 0)
-
-/* The actual assert */
-#define KGDB_ASSERT(condition, message) do {                   \
-       if (!(condition) && (kgdb_enabled)) {                   \
-               KGDB_PRINTK("Assertion failed at %s:%d: %s\n",  \
-                                  __FILE__, __LINE__, message);\
-               BREAKPOINT();                                   \
-       }                                                       \
-} while (0)
-#else
-#define KGDB_ASSERT(condition, message)
-#endif
-
+#endif                         /* !__ASSEMBLY__ */
 #endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-sh/system.h linux-2.6.18-53.1.14.kgdb/include/asm-sh/system.h
--- linux-2.6.18-53.1.14/include/asm-sh/system.h        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/asm-sh/system.h   2008-06-10 15:38:50.000000000 +0400
@@ -6,6 +6,7 @@
  * Copyright (C) 2002 Paul Mundt
  */
 
+#include <asm/types.h>
 
 /*
  *     switch_to() should switch tasks to task nr n, first
@@ -260,6 +261,45 @@ static __inline__ unsigned long __xchg(u
        return x;
 }
 
+static inline unsigned long __cmpxchg_u32(volatile int * m, unsigned long old,
+       unsigned long new)
+{
+       __u32 retval;
+       unsigned long flags;
+
+       local_irq_save(flags);
+       retval = *m;
+       if (retval == old)
+               *m = new;
+       local_irq_restore(flags);       /* implies memory barrier  */
+       return retval;
+}
+
+/* This function doesn't exist, so you'll get a linker error
+ * if something tries to do an invalid cmpxchg(). */
+extern void __cmpxchg_called_with_bad_pointer(void);
+
+#define __HAVE_ARCH_CMPXCHG    1
+
+static inline unsigned long __cmpxchg(volatile void * ptr, unsigned long old,
+               unsigned long new, int size)
+{
+       switch (size) {
+       case 4:
+               return __cmpxchg_u32(ptr, old, new);
+       }
+       __cmpxchg_called_with_bad_pointer();
+       return old;
+}
+
+#define cmpxchg(ptr,o,n)                                                \
+  ({                                                                    \
+     __typeof__(*(ptr)) _o_ = (o);                                      \
+     __typeof__(*(ptr)) _n_ = (n);                                      \
+     (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,          \
+                                   (unsigned long)_n_, sizeof(*(ptr))); \
+  })
+
 /* XXX
  * disable hlt during certain critical i/o operations
  */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-x86_64/kdebug.h linux-2.6.18-53.1.14.kgdb/include/asm-x86_64/kdebug.h
--- linux-2.6.18-53.1.14/include/asm-x86_64/kdebug.h    2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/asm-x86_64/kdebug.h       2008-06-10 15:38:41.000000000 +0400
@@ -34,6 +34,7 @@ enum die_val {
        DIE_CALL,
        DIE_NMI_IPI,
        DIE_PAGE_FAULT,
+       DIE_PAGE_FAULT_NO_CONTEXT,
 };
 
 static inline int notify_die(enum die_val val, const char *str,
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-x86_64/kgdb.h linux-2.6.18-53.1.14.kgdb/include/asm-x86_64/kgdb.h
--- linux-2.6.18-53.1.14/include/asm-x86_64/kgdb.h      1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/asm-x86_64/kgdb.h 2008-06-10 15:39:01.000000000 +0400
@@ -0,0 +1,54 @@
+#ifdef __KERNEL__
+#ifndef _ASM_KGDB_H_
+#define _ASM_KGDB_H_
+
+/*
+ * Copyright (C) 2001-2004 Amit S. Kale
+ */
+
+#include <asm-generic/kgdb.h>
+
+/*
+ *  Note that this register image is in a different order than
+ *  the register image that Linux produces at interrupt time.
+ *
+ *  Linux's register image is defined by struct pt_regs in ptrace.h.
+ *  Just why GDB uses a different order is a historical mystery.
+ */
+#define _RAX   0
+#define _RDX   1
+#define _RCX   2
+#define _RBX   3
+#define _RSI   4
+#define _RDI   5
+#define _RBP   6
+#define _RSP   7
+#define _R8    8
+#define _R9    9
+#define _R10   10
+#define _R11   11
+#define _R12   12
+#define _R13   13
+#define _R14   14
+#define _R15   15
+#define _PC    16
+#define _PS    17
+
+/* Number of bytes of registers.  */
+#define NUMREGBYTES            ((_PS+1)*8)
+#define NUMCRITREGBYTES                (8 * 8)         /* 8 registers. */
+
+/* Help GDB to know when to stop backtracing. */
+#define CFI_END_FRAME(func)    __CFI_END_FRAME(_PC,_RSP,func)
+#ifndef __ASSEMBLY__
+/* BUFMAX defines the maximum number of characters in inbound/outbound
+ * buffers at least NUMREGBYTES*2 are needed for register packets, and
+ * a longer buffer is needed to list all threads. */
+#define BUFMAX                 1024
+#define BREAKPOINT()           asm("   int $3");
+#define CHECK_EXCEPTION_STACK() ((&__get_cpu_var(init_tss))[0].ist[0])
+#define BREAK_INSTR_SIZE       1
+#define CACHE_FLUSH_IS_SAFE    1
+#endif                         /* !__ASSEMBLY__ */
+#endif                         /* _ASM_KGDB_H_ */
+#endif                         /* __KERNEL__ */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/asm-x86_64/system.h linux-2.6.18-53.1.14.kgdb/include/asm-x86_64/system.h
--- linux-2.6.18-53.1.14/include/asm-x86_64/system.h    2008-03-06 05:54:38.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/asm-x86_64/system.h       2008-06-10 15:38:44.000000000 +0400
@@ -22,7 +22,9 @@
 
 /* Save restore flags to clear handle leaking NT */
 #define switch_to(prev,next,last) \
-       asm volatile(SAVE_CONTEXT                                                   \
+       asm volatile(".globl __switch_to_begin\n\t"                                 \
+                    "__switch_to_begin:\n\t"                                     \
+                    SAVE_CONTEXT                                                 \
                     "movq %%rsp,%P[threadrsp](%[prev])\n\t" /* save RSP */       \
                     "movq %P[threadrsp](%[next]),%%rsp\n\t" /* restore RSP */    \
                     "call __switch_to\n\t"                                       \
@@ -34,6 +36,8 @@
                     "movq %%rax,%%rdi\n\t"                                       \
                     "jc   ret_from_fork\n\t"                                     \
                     RESTORE_CONTEXT                                                \
+                    ".globl __switch_to_end\n\t"                                 \
+                    "__switch_to_end:\n\t"                                       \
                     : "=a" (last)                                                \
                     : [next] "S" (next), [prev] "D" (prev),                      \
                       [threadrsp] "i" (offsetof(struct task_struct, thread.rsp)), \
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/linux/dwarf2-lang.h linux-2.6.18-53.1.14.kgdb/include/linux/dwarf2-lang.h
--- linux-2.6.18-53.1.14/include/linux/dwarf2-lang.h    1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/linux/dwarf2-lang.h       2008-06-10 15:39:01.000000000 +0400
@@ -0,0 +1,300 @@
+#ifndef DWARF2_LANG
+#define DWARF2_LANG
+
+/*
+ * This is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2, or (at your option) any later
+ * version.
+ */
+/*
+ * This file defines macros that allow generation of DWARF debug records
+ * for asm files.  This file is platform independent.  Register numbers
+ * (which are about the only thing that is platform dependent) are to be
+ * supplied by a platform defined file.
+ */
+/*
+ * We need this to work for both asm and C.  In asm we are using the
+ * old comment trick to concatenate while C uses the new ANSI thing.
+ * Here we have concat macro...  The multi level thing is to allow and
+ * macros used in the names to be resolved prior to the cat (at which
+ * time they are no longer the same string).
+ */
+#define CAT3(a,b,c) _CAT3(a,b,c)
+#define _CAT3(a,b,c) __CAT3(a,b,c)
+#ifndef __STDC__
+#define __CAT3(a,b,c) a/**/b/**/c
+#else
+#define __CAT3(a,b,c) a##b##c
+#endif
+#ifdef __ASSEMBLY__
+#define IFC(a)
+#define IFN_C(a) a
+#define NL ;
+#define QUOTE_THIS(a) a
+#define DWARF_preamble .section .debug_frame,"",%progbits;
+#else
+#define IFC(a) a
+#define IFN_C(a)
+#define NL \n\t
+#define QUOTE_THIS(a) _QUOTE_THIS(a)
+#define _QUOTE_THIS(a) #a
+/* Don't let CPP see the " and , \042=" \054=, */
+#define DWARF_preamble .section .debug_frame \054\042\042\054%progbits
+#endif
+
+#ifdef CONFIG_64BIT
+#define DATA_ALIGN_FACTOR      8
+#define ADDR_LOC               .quad
+#else
+#define DATA_ALIGN_FACTOR      4
+#define ADDR_LOC               .long
+#endif
+
+#include <linux/dwarf2-defs.h>
+/*
+ * This macro starts a debug frame section.  The debug_frame describes
+ * where to find the registers that the enclosing function saved on
+ * entry.
+ *
+ * ORD is use by the label generator and should be the same as what is
+ * passed to CFI_postamble.
+ *
+ * pc, pc register gdb ordinal.
+ *
+ * code_align this is the factor used to define locations or regions
+ * where the given definitions apply.  If you use labels to define these
+ * this should be 1.
+ *
+ * data_align this is the factor used to define register offsets.  If
+ * you use struct offset, this should be the size of the register in
+ * bytes or the negative of that.  This is how it is used: you will
+ * define a register as the reference register, say the stack pointer,
+ * then you will say where a register is located relative to this
+ * reference registers value, say 40 for register 3 (the gdb register
+ * number).  The <40> will be multiplied by <data_align> to define the
+ * byte offset of the given register (3, in this example).  So if your
+ * <40> is the byte offset and the reference register points at the
+ * begining, you would want 1 for the data_offset.  If <40> was the 40th
+ * 4-byte element in that structure you would want 4.  And if your
+ * reference register points at the end of the structure you would want
+ * a negative data_align value(and you would have to do other math as
+ * well).
+ */
+
+#define CFI_preamble(ORD, pc, code_align, data_align)  \
+         DWARF_preamble        NL                              \
+       .align DATA_ALIGN_FACTOR NL                     \
+        .globl CAT3(frame,_,ORD) NL                    \
+CAT3(frame,_,ORD): NL                                  \
+       .long 7f-6f NL                                  \
+6:                                                     \
+       .long   DW_CIE_ID NL                            \
+       .byte   DW_CIE_VERSION NL                       \
+       .byte 0  NL                                     \
+       .uleb128 code_align NL                          \
+       .sleb128 data_align NL                          \
+       .byte pc NL
+
+/*
+ * After the above macro and prior to the CFI_postamble, you need to
+ * define the initial state.  This starts with defining the reference
+ * register and, usually the pc.  Here are some helper macros:
+ */
+
+#define CFA_define_reference(reg, offset)      \
+       .byte DW_CFA_def_cfa NL                 \
+       .uleb128 reg NL                         \
+       .uleb128 (offset) NL
+
+#define CFA_define_offset(reg, offset)         \
+       .byte (DW_CFA_offset + reg) NL          \
+       .uleb128 (offset) NL
+
+#define CFA_restore(reg)                       \
+        .byte (DW_CFA_restore + reg) NL
+
+#define CFI_postamble()                                \
+       .align DATA_ALIGN_FACTOR NL                             \
+7: NL                                          \
+.previous NL
+
+/*
+ * So now your code pushs stuff on the stack, you need a new location
+ * and the rules for what to do.  This starts a running description of
+ * the call frame.  You need to describe what changes with respect to
+ * the call registers as the location of the pc moves through the code.
+ * The following builds an FDE (fram descriptor entry?).  Like the
+ * above, it has a preamble and a postamble.  It also is tied to the CFI
+ * above.
+ * The preamble macro is tied to the CFI thru the first parameter.  The
+ * second is the code start address and then the code end address+1.
+ */
+#define FDE_preamble(ORD, initial_address, end_address)        \
+        DWARF_preamble NL                              \
+       .align DATA_ALIGN_FACTOR NL                                     \
+       .long 9f-8f NL                                  \
+8:                                                     \
+       .long CAT3(frame,_,ORD) NL                      \
+       ADDR_LOC initial_address NL                     \
+       ADDR_LOC (end_address - initial_address) NL
+
+#define FDE_postamble()                                \
+       .align DATA_ALIGN_FACTOR NL                             \
+9:      NL                                     \
+.previous NL
+
+/*
+ * That done, you can now add registers, subtract registers, move the
+ * reference and even change the reference.  You can also define a new
+ * area of code the info applies to.  For discontinuous bits you should
+ * start a new FDE.  You may have as many as you like.
+ */
+
+/*
+ * To advance the stack address by <bytes> (0x3f max)
+ */
+
+#define CFA_advance_loc(bytes)                 \
+       .byte DW_CFA_advance_loc+bytes NL
+
+/*
+ * This one is good for 0xff or 255
+ */
+#define CFA_advance_loc1(bytes)                        \
+       .byte DW_CFA_advance_loc1 NL            \
+        .byte bytes NL
+
+#define CFA_undefine_reg(reg)                  \
+        .byte DW_CFA_undefined NL              \
+       .uleb128 reg NL
+/*
+ * With the above you can define all the register locations.  But
+ * suppose the reference register moves... Takes the new offset NOT an
+ * increment.  This is how esp is tracked if it is not saved.
+ */
+
+#define CFA_define_cfa_offset(offset)          \
+       .byte DW_CFA_def_cfa_offset NL          \
+       .uleb128 (offset) NL
+/*
+ * Or suppose you want to use a different reference register...
+ */
+#define CFA_define_cfa_register(reg)           \
+       .byte DW_CFA_def_cfa_register NL        \
+       .uleb128 reg NL
+
+/*
+ * If you want to mess with the stack pointer, here is the expression.
+ * The stack starts empty.
+ */
+#define CFA_def_cfa_expression                         \
+        .byte DW_CFA_def_cfa_expression        NL      \
+       .uleb128 20f-10f NL                     \
+10:     NL
+/*
+ * This expression is to be used for other regs.  The stack starts with the
+ * stack address.
+ */
+
+#define CFA_expression(reg)                    \
+        .byte DW_CFA_expression         NL             \
+        .uleb128 reg NL                                \
+       .uleb128 20f-10f NL                     \
+10:     NL
+/*
+ * Here we do the expression stuff.  You should code the above followed
+ *  by expression OPs followed by CFA_expression_end.
+ */
+
+
+#define CFA_expression_end                     \
+20:     NL
+
+#define CFA_exp_OP_const4s(a)                  \
+        .byte DW_OP_const4s NL                 \
+        .long a NL
+
+#define  CFA_exp_OP_swap  .byte DW_OP_swap NL
+#define  CFA_exp_OP_dup  .byte DW_OP_dup NL
+#define  CFA_exp_OP_drop  .byte DW_OP_drop NL
+/*
+ * All these work on the top two elements on the stack, replacing them
+ * with the result.  Top comes first where it matters.  True is 1, false 0.
+ */
+#define  CFA_exp_OP_deref .byte DW_OP_deref NL
+#define  CFA_exp_OP_and   .byte DW_OP_and NL
+#define  CFA_exp_OP_div   .byte DW_OP_div NL
+#define  CFA_exp_OP_minus .byte DW_OP_minus NL
+#define  CFA_exp_OP_mod   .byte DW_OP_mod NL
+#define  CFA_exp_OP_neg   .byte DW_OP_neg NL
+#define  CFA_exp_OP_plus  .byte DW_OP_plus NL
+#define  CFA_exp_OP_not   .byte DW_OP_not NL
+#define  CFA_exp_OP_or    .byte DW_OP_or NL
+#define  CFA_exp_OP_xor   .byte DW_OP_xor NL
+#define  CFA_exp_OP_le    .byte DW_OP_le NL
+#define  CFA_exp_OP_ge    .byte DW_OP_ge NL
+#define  CFA_exp_OP_eq    .byte DW_OP_eq NL
+#define  CFA_exp_OP_lt    .byte DW_OP_lt NL
+#define  CFA_exp_OP_gt    .byte DW_OP_gt NL
+#define  CFA_exp_OP_ne    .byte DW_OP_ne NL
+/*
+ * These take a parameter as noted
+ */
+/*
+ * Unconditional skip to loc. loc is a label (loc:)
+ */
+#define CFA_exp_OP_skip(loc)                   \
+         .byte DW_OP_skip  NL                  \
+        .hword  loc-.-2 NL
+/*
+ * Conditional skip to loc (TOS != 0, TOS--) (loc is a label)
+ */
+#define CFA_exp_OP_bra(loc)                    \
+         .byte DW_OP_bra NL                    \
+        .hword loc-.-2 NL
+
+/*
+ * TOS += no (an unsigned number)
+ */
+#define CFA_exp_OP_plus_uconst(no)             \
+         .byte DW_OP_plus_uconst NL            \
+         .uleb128 no NL
+
+/*
+ * ++TOS = no (a unsigned number)
+ */
+#define CFA_exp_OP_constu(no)                  \
+         .byte DW_OP_constu NL                 \
+        .uleb128 no NL
+/*
+ * ++TOS = no (a signed number)
+ */
+#define CFA_exp_OP_consts(no)                  \
+         .byte DW_OP_consts NL                 \
+        .sleb128 no NL
+/*
+ * ++TOS = no (an unsigned byte)
+ */
+#define CFA_exp_OP_const1u(no)                 \
+         .byte DW_OP_const1u NL                        \
+        .byte no NL
+
+
+/*
+ * ++TOS = no (a address)
+ */
+#define CFA_exp_OP_addr(no)                    \
+         .byte DW_OP_addr NL                   \
+        .long no NL
+
+/*
+ * Push current frames value for "reg" + offset
+ * We take advantage of the opcode assignments to make this a litteral reg
+ * rather than use the DW_OP_bregx opcode.
+ */
+
+#define CFA_exp_OP_breg(reg,offset)            \
+         .byte DW_OP_breg0+reg NL              \
+         .sleb128 offset NL
+#endif
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/linux/dwarf2.h linux-2.6.18-53.1.14.kgdb/include/linux/dwarf2.h
--- linux-2.6.18-53.1.14/include/linux/dwarf2.h 1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/linux/dwarf2.h    2008-06-10 15:39:01.000000000 +0400
@@ -0,0 +1,775 @@
+/* Declarations and definitions of codes relating to the DWARF2 symbolic
+   debugging information format.
+   Copyright (C) 1992, 1993, 1995, 1996, 1997, 1999, 2000, 2001, 2002,
+   2003 Free Software Foundation, Inc.
+
+   Written by Gary Funck (gary@intrepid.com) The Ada Joint Program
+   Office (AJPO), Florida State Unviversity and Silicon Graphics Inc.
+   provided support for this effort -- June 21, 1995.
+
+   Derived from the DWARF 1 implementation written by Ron Guilmette
+   (rfg@netcom.com), November 1990.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it under
+   the terms of the GNU General Public License as published by the Free
+   Software Foundation; either version 2, or (at your option) any later
+   version.
+
+   GCC is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+   License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING.  If not, write to the Free
+   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+/* This file is derived from the DWARF specification (a public document)
+   Revision 2.0.0 (July 27, 1993) developed by the UNIX International
+   Programming Languages Special Interest Group (UI/PLSIG) and distributed
+   by UNIX International.  Copies of this specification are available from
+   UNIX International, 20 Waterview Boulevard, Parsippany, NJ, 07054.
+
+   This file also now contains definitions from the DWARF 3 specification.  */
+
+/* This file is shared between GCC and GDB, and should not contain
+   prototypes.  */
+
+#ifndef _ELF_DWARF2_H
+#define _ELF_DWARF2_H
+
+/* Structure found in the .debug_line section.  */
+typedef struct
+{
+  unsigned char li_length          [4];
+  unsigned char li_version         [2];
+  unsigned char li_prologue_length [4];
+  unsigned char li_min_insn_length [1];
+  unsigned char li_default_is_stmt [1];
+  unsigned char li_line_base       [1];
+  unsigned char li_line_range      [1];
+  unsigned char li_opcode_base     [1];
+}
+DWARF2_External_LineInfo;
+
+typedef struct
+{
+  unsigned long  li_length;
+  unsigned short li_version;
+  unsigned int   li_prologue_length;
+  unsigned char  li_min_insn_length;
+  unsigned char  li_default_is_stmt;
+  int            li_line_base;
+  unsigned char  li_line_range;
+  unsigned char  li_opcode_base;
+}
+DWARF2_Internal_LineInfo;
+
+/* Structure found in .debug_pubnames section.  */
+typedef struct
+{
+  unsigned char pn_length  [4];
+  unsigned char pn_version [2];
+  unsigned char pn_offset  [4];
+  unsigned char pn_size    [4];
+}
+DWARF2_External_PubNames;
+
+typedef struct
+{
+  unsigned long  pn_length;
+  unsigned short pn_version;
+  unsigned long  pn_offset;
+  unsigned long  pn_size;
+}
+DWARF2_Internal_PubNames;
+
+/* Structure found in .debug_info section.  */
+typedef struct
+{
+  unsigned char  cu_length        [4];
+  unsigned char  cu_version       [2];
+  unsigned char  cu_abbrev_offset [4];
+  unsigned char  cu_pointer_size  [1];
+}
+DWARF2_External_CompUnit;
+
+typedef struct
+{
+  unsigned long  cu_length;
+  unsigned short cu_version;
+  unsigned long  cu_abbrev_offset;
+  unsigned char  cu_pointer_size;
+}
+DWARF2_Internal_CompUnit;
+
+typedef struct
+{
+  unsigned char  ar_length       [4];
+  unsigned char  ar_version      [2];
+  unsigned char  ar_info_offset  [4];
+  unsigned char  ar_pointer_size [1];
+  unsigned char  ar_segment_size [1];
+}
+DWARF2_External_ARange;
+
+typedef struct
+{
+  unsigned long  ar_length;
+  unsigned short ar_version;
+  unsigned long  ar_info_offset;
+  unsigned char  ar_pointer_size;
+  unsigned char  ar_segment_size;
+}
+DWARF2_Internal_ARange;
+
+
+/* Tag names and codes.  */
+enum dwarf_tag
+  {
+    DW_TAG_padding = 0x00,
+    DW_TAG_array_type = 0x01,
+    DW_TAG_class_type = 0x02,
+    DW_TAG_entry_point = 0x03,
+    DW_TAG_enumeration_type = 0x04,
+    DW_TAG_formal_parameter = 0x05,
+    DW_TAG_imported_declaration = 0x08,
+    DW_TAG_label = 0x0a,
+    DW_TAG_lexical_block = 0x0b,
+    DW_TAG_member = 0x0d,
+    DW_TAG_pointer_type = 0x0f,
+    DW_TAG_reference_type = 0x10,
+    DW_TAG_compile_unit = 0x11,
+    DW_TAG_string_type = 0x12,
+    DW_TAG_structure_type = 0x13,
+    DW_TAG_subroutine_type = 0x15,
+    DW_TAG_typedef = 0x16,
+    DW_TAG_union_type = 0x17,
+    DW_TAG_unspecified_parameters = 0x18,
+    DW_TAG_variant = 0x19,
+    DW_TAG_common_block = 0x1a,
+    DW_TAG_common_inclusion = 0x1b,
+    DW_TAG_inheritance = 0x1c,
+    DW_TAG_inlined_subroutine = 0x1d,
+    DW_TAG_module = 0x1e,
+    DW_TAG_ptr_to_member_type = 0x1f,
+    DW_TAG_set_type = 0x20,
+    DW_TAG_subrange_type = 0x21,
+    DW_TAG_with_stmt = 0x22,
+    DW_TAG_access_declaration = 0x23,
+    DW_TAG_base_type = 0x24,
+    DW_TAG_catch_block = 0x25,
+    DW_TAG_const_type = 0x26,
+    DW_TAG_constant = 0x27,
+    DW_TAG_enumerator = 0x28,
+    DW_TAG_file_type = 0x29,
+    DW_TAG_friend = 0x2a,
+    DW_TAG_namelist = 0x2b,
+    DW_TAG_namelist_item = 0x2c,
+    DW_TAG_packed_type = 0x2d,
+    DW_TAG_subprogram = 0x2e,
+    DW_TAG_template_type_param = 0x2f,
+    DW_TAG_template_value_param = 0x30,
+    DW_TAG_thrown_type = 0x31,
+    DW_TAG_try_block = 0x32,
+    DW_TAG_variant_part = 0x33,
+    DW_TAG_variable = 0x34,
+    DW_TAG_volatile_type = 0x35,
+    /* DWARF 3.  */
+    DW_TAG_dwarf_procedure = 0x36,
+    DW_TAG_restrict_type = 0x37,
+    DW_TAG_interface_type = 0x38,
+    DW_TAG_namespace = 0x39,
+    DW_TAG_imported_module = 0x3a,
+    DW_TAG_unspecified_type = 0x3b,
+    DW_TAG_partial_unit = 0x3c,
+    DW_TAG_imported_unit = 0x3d,
+    /* SGI/MIPS Extensions.  */
+    DW_TAG_MIPS_loop = 0x4081,
+    /* HP extensions.  See: ftp://ftp.hp.com/pub/lang/tools/WDB/wdb-4.0.tar.gz .  */
+    DW_TAG_HP_array_descriptor = 0x4090,
+    /* GNU extensions.  */
+    DW_TAG_format_label = 0x4101,      /* For FORTRAN 77 and Fortran 90.  */
+    DW_TAG_function_template = 0x4102, /* For C++.  */
+    DW_TAG_class_template = 0x4103,    /* For C++.  */
+    DW_TAG_GNU_BINCL = 0x4104,
+    DW_TAG_GNU_EINCL = 0x4105,
+    /* Extensions for UPC.  See: http://upc.gwu.edu/~upc.  */
+    DW_TAG_upc_shared_type = 0x8765,
+    DW_TAG_upc_strict_type = 0x8766,
+    DW_TAG_upc_relaxed_type = 0x8767,
+    /* PGI (STMicroelectronics) extensions.  No documentation available.  */
+    DW_TAG_PGI_kanji_type      = 0xA000,
+    DW_TAG_PGI_interface_block = 0xA020
+  };
+
+#define DW_TAG_lo_user 0x4080
+#define DW_TAG_hi_user 0xffff
+
+/* Flag that tells whether entry has a child or not.  */
+#define DW_children_no   0
+#define        DW_children_yes  1
+
+/* Form names and codes.  */
+enum dwarf_form
+  {
+    DW_FORM_addr = 0x01,
+    DW_FORM_block2 = 0x03,
+    DW_FORM_block4 = 0x04,
+    DW_FORM_data2 = 0x05,
+    DW_FORM_data4 = 0x06,
+    DW_FORM_data8 = 0x07,
+    DW_FORM_string = 0x08,
+    DW_FORM_block = 0x09,
+    DW_FORM_block1 = 0x0a,
+    DW_FORM_data1 = 0x0b,
+    DW_FORM_flag = 0x0c,
+    DW_FORM_sdata = 0x0d,
+    DW_FORM_strp = 0x0e,
+    DW_FORM_udata = 0x0f,
+    DW_FORM_ref_addr = 0x10,
+    DW_FORM_ref1 = 0x11,
+    DW_FORM_ref2 = 0x12,
+    DW_FORM_ref4 = 0x13,
+    DW_FORM_ref8 = 0x14,
+    DW_FORM_ref_udata = 0x15,
+    DW_FORM_indirect = 0x16
+  };
+
+/* Attribute names and codes.  */
+enum dwarf_attribute
+  {
+    DW_AT_sibling = 0x01,
+    DW_AT_location = 0x02,
+    DW_AT_name = 0x03,
+    DW_AT_ordering = 0x09,
+    DW_AT_subscr_data = 0x0a,
+    DW_AT_byte_size = 0x0b,
+    DW_AT_bit_offset = 0x0c,
+    DW_AT_bit_size = 0x0d,
+    DW_AT_element_list = 0x0f,
+    DW_AT_stmt_list = 0x10,
+    DW_AT_low_pc = 0x11,
+    DW_AT_high_pc = 0x12,
+    DW_AT_language = 0x13,
+    DW_AT_member = 0x14,
+    DW_AT_discr = 0x15,
+    DW_AT_discr_value = 0x16,
+    DW_AT_visibility = 0x17,
+    DW_AT_import = 0x18,
+    DW_AT_string_length = 0x19,
+    DW_AT_common_reference = 0x1a,
+    DW_AT_comp_dir = 0x1b,
+    DW_AT_const_value = 0x1c,
+    DW_AT_containing_type = 0x1d,
+    DW_AT_default_value = 0x1e,
+    DW_AT_inline = 0x20,
+    DW_AT_is_optional = 0x21,
+    DW_AT_lower_bound = 0x22,
+    DW_AT_producer = 0x25,
+    DW_AT_prototyped = 0x27,
+    DW_AT_return_addr = 0x2a,
+    DW_AT_start_scope = 0x2c,
+    DW_AT_stride_size = 0x2e,
+    DW_AT_upper_bound = 0x2f,
+    DW_AT_abstract_origin = 0x31,
+    DW_AT_accessibility = 0x32,
+    DW_AT_address_class = 0x33,
+    DW_AT_artificial = 0x34,
+    DW_AT_base_types = 0x35,
+    DW_AT_calling_convention = 0x36,
+    DW_AT_count = 0x37,
+    DW_AT_data_member_location = 0x38,
+    DW_AT_decl_column = 0x39,
+    DW_AT_decl_file = 0x3a,
+    DW_AT_decl_line = 0x3b,
+    DW_AT_declaration = 0x3c,
+    DW_AT_discr_list = 0x3d,
+    DW_AT_encoding = 0x3e,
+    DW_AT_external = 0x3f,
+    DW_AT_frame_base = 0x40,
+    DW_AT_friend = 0x41,
+    DW_AT_identifier_case = 0x42,
+    DW_AT_macro_info = 0x43,
+    DW_AT_namelist_items = 0x44,
+    DW_AT_priority = 0x45,
+    DW_AT_segment = 0x46,
+    DW_AT_specification = 0x47,
+    DW_AT_static_link = 0x48,
+    DW_AT_type = 0x49,
+    DW_AT_use_location = 0x4a,
+    DW_AT_variable_parameter = 0x4b,
+    DW_AT_virtuality = 0x4c,
+    DW_AT_vtable_elem_location = 0x4d,
+    /* DWARF 3 values.  */
+    DW_AT_allocated     = 0x4e,
+    DW_AT_associated    = 0x4f,
+    DW_AT_data_location = 0x50,
+    DW_AT_stride        = 0x51,
+    DW_AT_entry_pc      = 0x52,
+    DW_AT_use_UTF8      = 0x53,
+    DW_AT_extension     = 0x54,
+    DW_AT_ranges        = 0x55,
+    DW_AT_trampoline    = 0x56,
+    DW_AT_call_column   = 0x57,
+    DW_AT_call_file     = 0x58,
+    DW_AT_call_line     = 0x59,
+    /* SGI/MIPS extensions.  */
+    DW_AT_MIPS_fde = 0x2001,
+    DW_AT_MIPS_loop_begin = 0x2002,
+    DW_AT_MIPS_tail_loop_begin = 0x2003,
+    DW_AT_MIPS_epilog_begin = 0x2004,
+    DW_AT_MIPS_loop_unroll_factor = 0x2005,
+    DW_AT_MIPS_software_pipeline_depth = 0x2006,
+    DW_AT_MIPS_linkage_name = 0x2007,
+    DW_AT_MIPS_stride = 0x2008,
+    DW_AT_MIPS_abstract_name = 0x2009,
+    DW_AT_MIPS_clone_origin = 0x200a,
+    DW_AT_MIPS_has_inlines = 0x200b,
+    /* HP extensions.  */
+    DW_AT_HP_block_index         = 0x2000,
+    DW_AT_HP_unmodifiable        = 0x2001, /* Same as DW_AT_MIPS_fde.  */
+    DW_AT_HP_actuals_stmt_list   = 0x2010,
+    DW_AT_HP_proc_per_section    = 0x2011,
+    DW_AT_HP_raw_data_ptr        = 0x2012,
+    DW_AT_HP_pass_by_reference   = 0x2013,
+    DW_AT_HP_opt_level           = 0x2014,
+    DW_AT_HP_prof_version_id     = 0x2015,
+    DW_AT_HP_opt_flags           = 0x2016,
+    DW_AT_HP_cold_region_low_pc  = 0x2017,
+    DW_AT_HP_cold_region_high_pc = 0x2018,
+    DW_AT_HP_all_variables_modifiable = 0x2019,
+    DW_AT_HP_linkage_name        = 0x201a,
+    DW_AT_HP_prof_flags          = 0x201b,  /* In comp unit of procs_info for -g.  */
+    /* GNU extensions.  */
+    DW_AT_sf_names   = 0x2101,
+    DW_AT_src_info   = 0x2102,
+    DW_AT_mac_info   = 0x2103,
+    DW_AT_src_coords = 0x2104,
+    DW_AT_body_begin = 0x2105,
+    DW_AT_body_end   = 0x2106,
+    DW_AT_GNU_vector = 0x2107,
+    /* VMS extensions.  */
+    DW_AT_VMS_rtnbeg_pd_address = 0x2201,
+    /* UPC extension.  */
+    DW_AT_upc_threads_scaled = 0x3210,
+    /* PGI (STMicroelectronics) extensions.  */
+    DW_AT_PGI_lbase    = 0x3a00,
+    DW_AT_PGI_soffset  = 0x3a01,
+    DW_AT_PGI_lstride  = 0x3a02
+  };
+
+#define DW_AT_lo_user  0x2000  /* Implementation-defined range start.  */
+#define DW_AT_hi_user  0x3ff0  /* Implementation-defined range end.  */
+
+/* Location atom names and codes.  */
+enum dwarf_location_atom
+  {
+    DW_OP_addr = 0x03,
+    DW_OP_deref = 0x06,
+    DW_OP_const1u = 0x08,
+    DW_OP_const1s = 0x09,
+    DW_OP_const2u = 0x0a,
+    DW_OP_const2s = 0x0b,
+    DW_OP_const4u = 0x0c,
+    DW_OP_const4s = 0x0d,
+    DW_OP_const8u = 0x0e,
+    DW_OP_const8s = 0x0f,
+    DW_OP_constu = 0x10,
+    DW_OP_consts = 0x11,
+    DW_OP_dup = 0x12,
+    DW_OP_drop = 0x13,
+    DW_OP_over = 0x14,
+    DW_OP_pick = 0x15,
+    DW_OP_swap = 0x16,
+    DW_OP_rot = 0x17,
+    DW_OP_xderef = 0x18,
+    DW_OP_abs = 0x19,
+    DW_OP_and = 0x1a,
+    DW_OP_div = 0x1b,
+    DW_OP_minus = 0x1c,
+    DW_OP_mod = 0x1d,
+    DW_OP_mul = 0x1e,
+    DW_OP_neg = 0x1f,
+    DW_OP_not = 0x20,
+    DW_OP_or = 0x21,
+    DW_OP_plus = 0x22,
+    DW_OP_plus_uconst = 0x23,
+    DW_OP_shl = 0x24,
+    DW_OP_shr = 0x25,
+    DW_OP_shra = 0x26,
+    DW_OP_xor = 0x27,
+    DW_OP_bra = 0x28,
+    DW_OP_eq = 0x29,
+    DW_OP_ge = 0x2a,
+    DW_OP_gt = 0x2b,
+    DW_OP_le = 0x2c,
+    DW_OP_lt = 0x2d,
+    DW_OP_ne = 0x2e,
+    DW_OP_skip = 0x2f,
+    DW_OP_lit0 = 0x30,
+    DW_OP_lit1 = 0x31,
+    DW_OP_lit2 = 0x32,
+    DW_OP_lit3 = 0x33,
+    DW_OP_lit4 = 0x34,
+    DW_OP_lit5 = 0x35,
+    DW_OP_lit6 = 0x36,
+    DW_OP_lit7 = 0x37,
+    DW_OP_lit8 = 0x38,
+    DW_OP_lit9 = 0x39,
+    DW_OP_lit10 = 0x3a,
+    DW_OP_lit11 = 0x3b,
+    DW_OP_lit12 = 0x3c,
+    DW_OP_lit13 = 0x3d,
+    DW_OP_lit14 = 0x3e,
+    DW_OP_lit15 = 0x3f,
+    DW_OP_lit16 = 0x40,
+    DW_OP_lit17 = 0x41,
+    DW_OP_lit18 = 0x42,
+    DW_OP_lit19 = 0x43,
+    DW_OP_lit20 = 0x44,
+    DW_OP_lit21 = 0x45,
+    DW_OP_lit22 = 0x46,
+    DW_OP_lit23 = 0x47,
+    DW_OP_lit24 = 0x48,
+    DW_OP_lit25 = 0x49,
+    DW_OP_lit26 = 0x4a,
+    DW_OP_lit27 = 0x4b,
+    DW_OP_lit28 = 0x4c,
+    DW_OP_lit29 = 0x4d,
+    DW_OP_lit30 = 0x4e,
+    DW_OP_lit31 = 0x4f,
+    DW_OP_reg0 = 0x50,
+    DW_OP_reg1 = 0x51,
+    DW_OP_reg2 = 0x52,
+    DW_OP_reg3 = 0x53,
+    DW_OP_reg4 = 0x54,
+    DW_OP_reg5 = 0x55,
+    DW_OP_reg6 = 0x56,
+    DW_OP_reg7 = 0x57,
+    DW_OP_reg8 = 0x58,
+    DW_OP_reg9 = 0x59,
+    DW_OP_reg10 = 0x5a,
+    DW_OP_reg11 = 0x5b,
+    DW_OP_reg12 = 0x5c,
+    DW_OP_reg13 = 0x5d,
+    DW_OP_reg14 = 0x5e,
+    DW_OP_reg15 = 0x5f,
+    DW_OP_reg16 = 0x60,
+    DW_OP_reg17 = 0x61,
+    DW_OP_reg18 = 0x62,
+    DW_OP_reg19 = 0x63,
+    DW_OP_reg20 = 0x64,
+    DW_OP_reg21 = 0x65,
+    DW_OP_reg22 = 0x66,
+    DW_OP_reg23 = 0x67,
+    DW_OP_reg24 = 0x68,
+    DW_OP_reg25 = 0x69,
+    DW_OP_reg26 = 0x6a,
+    DW_OP_reg27 = 0x6b,
+    DW_OP_reg28 = 0x6c,
+    DW_OP_reg29 = 0x6d,
+    DW_OP_reg30 = 0x6e,
+    DW_OP_reg31 = 0x6f,
+    DW_OP_breg0 = 0x70,
+    DW_OP_breg1 = 0x71,
+    DW_OP_breg2 = 0x72,
+    DW_OP_breg3 = 0x73,
+    DW_OP_breg4 = 0x74,
+    DW_OP_breg5 = 0x75,
+    DW_OP_breg6 = 0x76,
+    DW_OP_breg7 = 0x77,
+    DW_OP_breg8 = 0x78,
+    DW_OP_breg9 = 0x79,
+    DW_OP_breg10 = 0x7a,
+    DW_OP_breg11 = 0x7b,
+    DW_OP_breg12 = 0x7c,
+    DW_OP_breg13 = 0x7d,
+    DW_OP_breg14 = 0x7e,
+    DW_OP_breg15 = 0x7f,
+    DW_OP_breg16 = 0x80,
+    DW_OP_breg17 = 0x81,
+    DW_OP_breg18 = 0x82,
+    DW_OP_breg19 = 0x83,
+    DW_OP_breg20 = 0x84,
+    DW_OP_breg21 = 0x85,
+    DW_OP_breg22 = 0x86,
+    DW_OP_breg23 = 0x87,
+    DW_OP_breg24 = 0x88,
+    DW_OP_breg25 = 0x89,
+    DW_OP_breg26 = 0x8a,
+    DW_OP_breg27 = 0x8b,
+    DW_OP_breg28 = 0x8c,
+    DW_OP_breg29 = 0x8d,
+    DW_OP_breg30 = 0x8e,
+    DW_OP_breg31 = 0x8f,
+    DW_OP_regx = 0x90,
+    DW_OP_fbreg = 0x91,
+    DW_OP_bregx = 0x92,
+    DW_OP_piece = 0x93,
+    DW_OP_deref_size = 0x94,
+    DW_OP_xderef_size = 0x95,
+    DW_OP_nop = 0x96,
+    /* DWARF 3 extensions.  */
+    DW_OP_push_object_address = 0x97,
+    DW_OP_call2 = 0x98,
+    DW_OP_call4 = 0x99,
+    DW_OP_call_ref = 0x9a,
+    /* GNU extensions.  */
+    DW_OP_GNU_push_tls_address = 0xe0,
+    /* HP extensions.  */
+    DW_OP_HP_unknown     = 0xe0, /* Ouch, the same as GNU_push_tls_address.  */
+    DW_OP_HP_is_value    = 0xe1,
+    DW_OP_HP_fltconst4   = 0xe2,
+    DW_OP_HP_fltconst8   = 0xe3,
+    DW_OP_HP_mod_range   = 0xe4,
+    DW_OP_HP_unmod_range = 0xe5,
+    DW_OP_HP_tls         = 0xe6
+  };
+
+#define DW_OP_lo_user  0xe0    /* Implementation-defined range start.  */
+#define DW_OP_hi_user  0xff    /* Implementation-defined range end.  */
+
+/* Type encodings.  */
+enum dwarf_type
+  {
+    DW_ATE_void = 0x0,
+    DW_ATE_address = 0x1,
+    DW_ATE_boolean = 0x2,
+    DW_ATE_complex_float = 0x3,
+    DW_ATE_float = 0x4,
+    DW_ATE_signed = 0x5,
+    DW_ATE_signed_char = 0x6,
+    DW_ATE_unsigned = 0x7,
+    DW_ATE_unsigned_char = 0x8,
+    /* DWARF 3.  */
+    DW_ATE_imaginary_float = 0x9,
+    /* HP extensions.  */
+    DW_ATE_HP_float80            = 0x80, /* Floating-point (80 bit).  */
+    DW_ATE_HP_complex_float80    = 0x81, /* Complex floating-point (80 bit).  */
+    DW_ATE_HP_float128           = 0x82, /* Floating-point (128 bit).  */
+    DW_ATE_HP_complex_float128   = 0x83, /* Complex floating-point (128 bit).  */
+    DW_ATE_HP_floathpintel       = 0x84, /* Floating-point (82 bit IA64).  */
+    DW_ATE_HP_imaginary_float80  = 0x85,
+    DW_ATE_HP_imaginary_float128 = 0x86
+  };
+
+#define        DW_ATE_lo_user 0x80
+#define        DW_ATE_hi_user 0xff
+
+/* Array ordering names and codes.  */
+enum dwarf_array_dim_ordering
+  {
+    DW_ORD_row_major = 0,
+    DW_ORD_col_major = 1
+  };
+
+/* Access attribute.  */
+enum dwarf_access_attribute
+  {
+    DW_ACCESS_public = 1,
+    DW_ACCESS_protected = 2,
+    DW_ACCESS_private = 3
+  };
+
+/* Visibility.  */
+enum dwarf_visibility_attribute
+  {
+    DW_VIS_local = 1,
+    DW_VIS_exported = 2,
+    DW_VIS_qualified = 3
+  };
+
+/* Virtuality.  */
+enum dwarf_virtuality_attribute
+  {
+    DW_VIRTUALITY_none = 0,
+    DW_VIRTUALITY_virtual = 1,
+    DW_VIRTUALITY_pure_virtual = 2
+  };
+
+/* Case sensitivity.  */
+enum dwarf_id_case
+  {
+    DW_ID_case_sensitive = 0,
+    DW_ID_up_case = 1,
+    DW_ID_down_case = 2,
+    DW_ID_case_insensitive = 3
+  };
+
+/* Calling convention.  */
+enum dwarf_calling_convention
+  {
+    DW_CC_normal = 0x1,
+    DW_CC_program = 0x2,
+    DW_CC_nocall = 0x3
+  };
+
+#define DW_CC_lo_user 0x40
+#define DW_CC_hi_user 0xff
+
+/* Inline attribute.  */
+enum dwarf_inline_attribute
+  {
+    DW_INL_not_inlined = 0,
+    DW_INL_inlined = 1,
+    DW_INL_declared_not_inlined = 2,
+    DW_INL_declared_inlined = 3
+  };
+
+/* Discriminant lists.  */
+enum dwarf_discrim_list
+  {
+    DW_DSC_label = 0,
+    DW_DSC_range = 1
+  };
+
+/* Line number opcodes.  */
+enum dwarf_line_number_ops
+  {
+    DW_LNS_extended_op = 0,
+    DW_LNS_copy = 1,
+    DW_LNS_advance_pc = 2,
+    DW_LNS_advance_line = 3,
+    DW_LNS_set_file = 4,
+    DW_LNS_set_column = 5,
+    DW_LNS_negate_stmt = 6,
+    DW_LNS_set_basic_block = 7,
+    DW_LNS_const_add_pc = 8,
+    DW_LNS_fixed_advance_pc = 9,
+    /* DWARF 3.  */
+    DW_LNS_set_prologue_end = 10,
+    DW_LNS_set_epilogue_begin = 11,
+    DW_LNS_set_isa = 12
+  };
+
+/* Line number extended opcodes.  */
+enum dwarf_line_number_x_ops
+  {
+    DW_LNE_end_sequence = 1,
+    DW_LNE_set_address = 2,
+    DW_LNE_define_file = 3,
+    /* HP extensions.  */
+    DW_LNE_HP_negate_is_UV_update      = 0x11,
+    DW_LNE_HP_push_context             = 0x12,
+    DW_LNE_HP_pop_context              = 0x13,
+    DW_LNE_HP_set_file_line_column     = 0x14,
+    DW_LNE_HP_set_routine_name         = 0x15,
+    DW_LNE_HP_set_sequence             = 0x16,
+    DW_LNE_HP_negate_post_semantics    = 0x17,
+    DW_LNE_HP_negate_function_exit     = 0x18,
+    DW_LNE_HP_negate_front_end_logical = 0x19,
+    DW_LNE_HP_define_proc              = 0x20
+  };
+
+/* Call frame information.  */
+enum dwarf_call_frame_info
+  {
+    DW_CFA_advance_loc = 0x40,
+    DW_CFA_offset = 0x80,
+    DW_CFA_restore = 0xc0,
+    DW_CFA_nop = 0x00,
+    DW_CFA_set_loc = 0x01,
+    DW_CFA_advance_loc1 = 0x02,
+    DW_CFA_advance_loc2 = 0x03,
+    DW_CFA_advance_loc4 = 0x04,
+    DW_CFA_offset_extended = 0x05,
+    DW_CFA_restore_extended = 0x06,
+    DW_CFA_undefined = 0x07,
+    DW_CFA_same_value = 0x08,
+    DW_CFA_register = 0x09,
+    DW_CFA_remember_state = 0x0a,
+    DW_CFA_restore_state = 0x0b,
+    DW_CFA_def_cfa = 0x0c,
+    DW_CFA_def_cfa_register = 0x0d,
+    DW_CFA_def_cfa_offset = 0x0e,
+    /* DWARF 3.  */
+    DW_CFA_def_cfa_expression = 0x0f,
+    DW_CFA_expression = 0x10,
+    DW_CFA_offset_extended_sf = 0x11,
+    DW_CFA_def_cfa_sf = 0x12,
+    DW_CFA_def_cfa_offset_sf = 0x13,
+    /* SGI/MIPS specific.  */
+    DW_CFA_MIPS_advance_loc8 = 0x1d,
+    /* GNU extensions.  */
+    DW_CFA_GNU_window_save = 0x2d,
+    DW_CFA_GNU_args_size = 0x2e,
+    DW_CFA_GNU_negative_offset_extended = 0x2f
+  };
+
+#define DW_CIE_ID        0xffffffff
+#define DW_CIE_VERSION   1
+
+#define DW_CFA_extended   0
+#define DW_CFA_lo_user    0x1c
+#define DW_CFA_hi_user    0x3f
+
+#define DW_CHILDREN_no              0x00
+#define DW_CHILDREN_yes                     0x01
+
+#define DW_ADDR_none           0
+
+/* Source language names and codes.  */
+enum dwarf_source_language
+  {
+    DW_LANG_C89 = 0x0001,
+    DW_LANG_C = 0x0002,
+    DW_LANG_Ada83 = 0x0003,
+    DW_LANG_C_plus_plus = 0x0004,
+    DW_LANG_Cobol74 = 0x0005,
+    DW_LANG_Cobol85 = 0x0006,
+    DW_LANG_Fortran77 = 0x0007,
+    DW_LANG_Fortran90 = 0x0008,
+    DW_LANG_Pascal83 = 0x0009,
+    DW_LANG_Modula2 = 0x000a,
+    DW_LANG_Java = 0x000b,
+    /* DWARF 3.  */
+    DW_LANG_C99 = 0x000c,
+    DW_LANG_Ada95 = 0x000d,
+    DW_LANG_Fortran95 = 0x000e,
+    /* MIPS.  */
+    DW_LANG_Mips_Assembler = 0x8001,
+    /* UPC.  */
+    DW_LANG_Upc = 0x8765
+  };
+
+#define DW_LANG_lo_user 0x8000 /* Implementation-defined range start.  */
+#define DW_LANG_hi_user 0xffff /* Implementation-defined range start.  */
+
+/* Names and codes for macro information.  */
+enum dwarf_macinfo_record_type
+  {
+    DW_MACINFO_define = 1,
+    DW_MACINFO_undef = 2,
+    DW_MACINFO_start_file = 3,
+    DW_MACINFO_end_file = 4,
+    DW_MACINFO_vendor_ext = 255
+  };
+\f
+/* @@@ For use with GNU frame unwind information.  */
+
+#define DW_EH_PE_absptr                0x00
+#define DW_EH_PE_omit          0xff
+
+#define DW_EH_PE_uleb128       0x01
+#define DW_EH_PE_udata2                0x02
+#define DW_EH_PE_udata4                0x03
+#define DW_EH_PE_udata8                0x04
+#define DW_EH_PE_sleb128       0x09
+#define DW_EH_PE_sdata2                0x0A
+#define DW_EH_PE_sdata4                0x0B
+#define DW_EH_PE_sdata8                0x0C
+#define DW_EH_PE_signed                0x08
+
+#define DW_EH_PE_pcrel         0x10
+#define DW_EH_PE_textrel       0x20
+#define DW_EH_PE_datarel       0x30
+#define DW_EH_PE_funcrel       0x40
+#define DW_EH_PE_aligned       0x50
+
+#define DW_EH_PE_indirect      0x80
+
+#endif /* _ELF_DWARF2_H */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/linux/kgdb.h linux-2.6.18-53.1.14.kgdb/include/linux/kgdb.h
--- linux-2.6.18-53.1.14/include/linux/kgdb.h   1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/linux/kgdb.h      2008-06-10 15:39:21.000000000 +0400
@@ -0,0 +1,279 @@
+/*
+ * include/linux/kgdb.h
+ *
+ * This provides the hooks and functions that KGDB needs to share between
+ * the core, I/O and arch-specific portions.
+ *
+ * Author: Amit Kale <amitkale@linsyssoft.com> and
+ *         Tom Rini <trini@kernel.crashing.org>
+ *
+ * 2001-2004 (c) Amit S. Kale and 2003-2005 (c) MontaVista Software, Inc.
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+#ifdef __KERNEL__
+#ifndef _KGDB_H_
+#define _KGDB_H_
+
+#include <asm/atomic.h>
+
+#ifdef CONFIG_KGDB
+#include <asm/kgdb.h>
+#include <linux/serial_8250.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+
+#ifndef CHECK_EXCEPTION_STACK
+#define CHECK_EXCEPTION_STACK()        1
+#endif
+
+struct tasklet_struct;
+struct pt_regs;
+struct task_struct;
+struct uart_port;
+
+#ifdef CONFIG_KGDB_CONSOLE
+extern struct console kgdbcons;
+#endif
+
+/* To enter the debugger explicitly. */
+extern void breakpoint(void);
+extern int kgdb_connected;
+extern int kgdb_may_fault;
+extern struct tasklet_struct kgdb_tasklet_breakpoint;
+
+extern atomic_t kgdb_setting_breakpoint;
+extern atomic_t cpu_doing_single_step;
+extern atomic_t kgdb_sync_softlockup[NR_CPUS];
+
+extern struct task_struct *kgdb_usethread, *kgdb_contthread;
+
+enum kgdb_bptype {
+       bp_breakpoint = '0',
+       bp_hardware_breakpoint,
+       bp_write_watchpoint,
+       bp_read_watchpoint,
+       bp_access_watchpoint
+};
+
+enum kgdb_bpstate {
+       bp_none = 0,
+       bp_removed,
+       bp_set,
+       bp_active
+};
+
+struct kgdb_bkpt {
+       unsigned long bpt_addr;
+       unsigned char saved_instr[BREAK_INSTR_SIZE];
+       enum kgdb_bptype type;
+       enum kgdb_bpstate state;
+};
+
+/* The maximum number of KGDB I/O modules that can be loaded */
+#define MAX_KGDB_IO_HANDLERS 3
+
+#ifndef MAX_BREAKPOINTS
+#define MAX_BREAKPOINTS                1000
+#endif
+
+#define KGDB_HW_BREAKPOINT     1
+
+/* Required functions. */
+/**
+ *     regs_to_gdb_regs - Convert ptrace regs to GDB regs
+ *     @gdb_regs: A pointer to hold the registers in the order GDB wants.
+ *     @regs: The &struct pt_regs of the current process.
+ *
+ *     Convert the pt_regs in @regs into the format for registers that
+ *     GDB expects, stored in @gdb_regs.
+ */
+extern void regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs);
+
+/**
+ *     sleeping_regs_to_gdb_regs - Convert ptrace regs to GDB regs
+ *     @gdb_regs: A pointer to hold the registers in the order GDB wants.
+ *     @p: The &struct task_struct of the desired process.
+ *
+ *     Convert the register values of the sleeping process in @p to
+ *     the format that GDB expects.
+ *     This function is called when kgdb does not have access to the
+ *     &struct pt_regs and therefore it should fill the gdb registers
+ *     @gdb_regs with what has been saved in &struct thread_struct
+ *     thread field during switch_to.
+ */
+extern void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs,
+                                       struct task_struct *p);
+
+/**
+ *     gdb_regs_to_regs - Convert GDB regs to ptrace regs.
+ *     @gdb_regs: A pointer to hold the registers we've recieved from GDB.
+ *     @regs: A pointer to a &struct pt_regs to hold these values in.
+ *
+ *     Convert the GDB regs in @gdb_regs into the pt_regs, and store them
+ *     in @regs.
+ */
+extern void gdb_regs_to_regs(unsigned long *gdb_regs, struct pt_regs *regs);
+
+/**
+ *     kgdb_arch_handle_exception - Handle architecture specific GDB packets.
+ *     @vector: The error vector of the exception that happened.
+ *     @signo: The signal number of the exception that happened.
+ *     @err_code: The error code of the exception that happened.
+ *     @remcom_in_buffer: The buffer of the packet we have read.
+ *     @remcom_out_buffer: The buffer, of %BUFMAX to write a packet into.
+ *     @regs: The &struct pt_regs of the current process.
+ *
+ *     This function MUST handle the 'c' and 's' command packets,
+ *     as well packets to set / remove a hardware breakpoint, if used.
+ *     If there are additional packets which the hardware needs to handle,
+ *     they are handled here.  The code should return -1 if it wants to
+ *     process more packets, and a %0 or %1 if it wants to exit from the
+ *     kgdb hook.
+ */
+extern int kgdb_arch_handle_exception(int vector, int signo, int err_code,
+                                     char *remcom_in_buffer,
+                                     char *remcom_out_buffer,
+                                     struct pt_regs *regs);
+
+#ifndef JMP_REGS_ALIGNMENT
+#define JMP_REGS_ALIGNMENT
+#endif
+
+extern unsigned long kgdb_fault_jmp_regs[];
+
+/**
+ *     kgdb_fault_setjmp - Store state in case we fault.
+ *     @curr_context: An array to store state into.
+ *
+ *     Certain functions may try and access memory, and in doing so may
+ *     cause a fault.  When this happens, we trap it, restore state to
+ *     this call, and let ourself know that something bad has happened.
+ */
+extern asmlinkage int kgdb_fault_setjmp(unsigned long *curr_context);
+
+/**
+ *     kgdb_fault_longjmp - Restore state when we have faulted.
+ *     @curr_context: The previously stored state.
+ *
+ *     When something bad does happen, this function is called to
+ *     restore the known good state, and set the return value to 1, so
+ *     we know something bad happened.
+ */
+extern asmlinkage void kgdb_fault_longjmp(unsigned long *curr_context);
+
+/* Optional functions. */
+extern int kgdb_arch_init(void);
+extern void kgdb_disable_hw_debug(struct pt_regs *regs);
+extern void kgdb_post_master_code(struct pt_regs *regs, int e_vector,
+                                 int err_code);
+extern void kgdb_roundup_cpus(unsigned long flags);
+extern int kgdb_set_hw_break(unsigned long addr);
+extern int kgdb_remove_hw_break(unsigned long addr);
+extern void kgdb_remove_all_hw_break(void);
+extern void kgdb_correct_hw_break(void);
+extern void kgdb_shadowinfo(struct pt_regs *regs, char *buffer,
+                           unsigned threadid);
+extern struct task_struct *kgdb_get_shadow_thread(struct pt_regs *regs,
+                                                 int threadid);
+extern struct pt_regs *kgdb_shadow_regs(struct pt_regs *regs, int threadid);
+extern int kgdb_validate_break_address(unsigned long addr);
+extern int kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr);
+extern int kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle);
+
+/**
+ * struct kgdb_arch - Desribe architecture specific values.
+ * @gdb_bpt_instr: The instruction to trigger a breakpoint.
+ * @flags: Flags for the breakpoint, currently just %KGDB_HW_BREAKPOINT.
+ * @shadowth: A value of %1 indicates we shadow information on processes.
+ * @set_breakpoint: Allow an architecture to specify how to set a software
+ * breakpoint.
+ * @remove_breakpoint: Allow an architecture to specify how to remove a
+ * software breakpoint.
+ * @set_hw_breakpoint: Allow an architecture to specify how to set a hardware
+ * breakpoint.
+ * @remove_hw_breakpoint: Allow an architecture to specify how to remove a
+ * hardware breakpoint.
+ *
+ * The @shadowth flag is an option to shadow information not retrievable by
+ * gdb otherwise.  This is deprecated in favor of a binutils which supports
+ * CFI macros.
+ */
+struct kgdb_arch {
+       unsigned char gdb_bpt_instr[BREAK_INSTR_SIZE];
+       unsigned long flags;
+       unsigned shadowth;
+       int (*set_breakpoint) (unsigned long, char *);
+       int (*remove_breakpoint)(unsigned long, char *);
+       int (*set_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
+       int (*remove_hw_breakpoint)(unsigned long, int, enum kgdb_bptype);
+};
+
+/* Thread reference */
+typedef unsigned char threadref[8];
+
+/**
+ * struct kgdb_io - Desribe the interface for an I/O driver to talk with KGDB.
+ * @read_char: Pointer to a function that will return one char.
+ * @write_char: Pointer to a function that will write one char.
+ * @flush: Pointer to a function that will flush any pending writes.
+ * @init: Pointer to a function that will initialize the device.
+ * @late_init: Pointer to a function that will do any setup that has
+ * other dependencies.
+ * @pre_exception: Pointer to a function that will do any prep work for
+ * the I/O driver.
+ * @post_exception: Pointer to a function that will do any cleanup work
+ * for the I/O driver.
+ *
+ * The @init and @late_init function pointers allow for an I/O driver
+ * such as a serial driver to fully initialize the port with @init and
+ * be called very early, yet safely call request_irq() later in the boot
+ * sequence.
+ *
+ * @init is allowed to return a non-0 return value to indicate failure.
+ * If this is called early on, then KGDB will try again when it would call
+ * @late_init.  If it has failed later in boot as well, the user will be
+ * notified.
+ */
+struct kgdb_io {
+       int (*read_char) (void);
+       void (*write_char) (u8);
+       void (*flush) (void);
+       int (*init) (void);
+       void (*late_init) (void);
+       void (*pre_exception) (void);
+       void (*post_exception) (void);
+};
+
+extern struct kgdb_io kgdb_io_ops;
+extern struct kgdb_arch arch_kgdb_ops;
+extern int kgdb_initialized;
+
+extern int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops);
+extern void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops);
+
+extern void __init kgdb8250_add_port(int i, struct uart_port *serial_req);
+extern void __init kgdb8250_add_platform_port(int i, struct plat_serial8250_port *serial_req);
+
+extern int kgdb_hex2long(char **ptr, long *long_val);
+extern char *kgdb_mem2hex(char *mem, char *buf, int count);
+extern char *kgdb_hex2mem(char *buf, char *mem, int count);
+extern int kgdb_get_mem(char *addr, unsigned char *buf, int count);
+extern int kgdb_set_mem(char *addr, unsigned char *buf, int count);
+
+int kgdb_isremovedbreak(unsigned long addr);
+int kgdb_skipexception(int exception, struct pt_regs *regs);
+
+extern int kgdb_handle_exception(int ex_vector, int signo, int err_code,
+                               struct pt_regs *regs);
+extern void kgdb_nmihook(int cpu, void *regs);
+extern int debugger_step;
+extern atomic_t debugger_active;
+extern struct kgdb_arch *kgdb_ops;
+#else
+/* Stubs for when KGDB is not set. */
+static const atomic_t debugger_active = ATOMIC_INIT(0);
+#endif                         /* CONFIG_KGDB */
+#endif                         /* _KGDB_H_ */
+#endif                         /* __KERNEL__ */
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/linux/module.h linux-2.6.18-53.1.14.kgdb/include/linux/module.h
--- linux-2.6.18-53.1.14/include/linux/module.h 2008-03-06 05:54:41.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/include/linux/module.h    2008-06-10 15:39:15.000000000 +0400
@@ -229,8 +229,17 @@ enum module_state
        MODULE_STATE_LIVE,
        MODULE_STATE_COMING,
        MODULE_STATE_GOING,
+       MODULE_STATE_GONE,
 };
 
+#ifdef CONFIG_KGDB
+#define MAX_SECTNAME 31
+struct mod_section {
+       void *address;
+       char name[MAX_SECTNAME + 1];
+};
+#endif
+
 /* Similar stuff for section attributes. */
 #define MODULE_SECT_NAME_LEN 32
 struct module_sect_attr
@@ -258,6 +267,13 @@ struct module
        /* Unique handle for this module */
        char name[MODULE_NAME_LEN];
 
+#ifdef CONFIG_KGDB
+       /* keep kgdb info at the begining so that gdb doesn't have a chance to
+        * miss out any fields */
+       unsigned long num_sections;
+       struct mod_section *mod_sections;
+#endif
+
        /* Sysfs stuff. */
        struct module_kobject mkobj;
        struct module_param_attrs *param_attrs;
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/linux/netpoll.h linux-2.6.18-53.1.14.kgdb/include/linux/netpoll.h
--- linux-2.6.18-53.1.14/include/linux/netpoll.h        2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/linux/netpoll.h   2008-06-10 15:37:49.000000000 +0400
@@ -17,7 +17,7 @@ struct netpoll;
 struct netpoll {
        struct net_device *dev;
        char dev_name[16], *name;
-       void (*rx_hook)(struct netpoll *, int, char *, int);
+       void (*rx_hook)(struct netpoll *, int, char *, int, struct sk_buff *);
        void (*drop)(struct sk_buff *skb);
        u32 local_ip, remote_ip;
        u16 local_port, remote_port;
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/include/linux/serial_8250.h linux-2.6.18-53.1.14.kgdb/include/linux/serial_8250.h
--- linux-2.6.18-53.1.14/include/linux/serial_8250.h    2006-09-20 07:42:06.000000000 +0400
+++ linux-2.6.18-53.1.14.kgdb/include/linux/serial_8250.h       2008-06-10 15:37:43.000000000 +0400
@@ -56,6 +56,7 @@ struct uart_port;
 
 int serial8250_register_port(struct uart_port *);
 void serial8250_unregister_port(int line);
+void serial8250_unregister_by_port(struct uart_port *port);
 void serial8250_suspend_port(int line);
 void serial8250_resume_port(int line);
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/kernel/Makefile linux-2.6.18-53.1.14.kgdb/kernel/Makefile
--- linux-2.6.18-53.1.14/kernel/Makefile        2008-03-06 05:54:50.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/kernel/Makefile   2008-06-10 15:37:25.000000000 +0400
@@ -42,6 +42,7 @@ obj-$(CONFIG_STOP_MACHINE) += stop_machi
 obj-$(CONFIG_AUDIT) += audit.o auditfilter.o
 obj-$(CONFIG_AUDITSYSCALL) += auditsc.o audit_tree.o
 obj-$(CONFIG_KPROBES) += kprobes.o
+obj-$(CONFIG_KGDB) += kgdb.o kgdbarchlib.o
 obj-$(CONFIG_SYSFS) += ksysfs.o
 obj-$(CONFIG_DETECT_SOFTLOCKUP) += softlockup.o
 obj-$(CONFIG_GENERIC_HARDIRQS) += irq/
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/kernel/kgdb.c linux-2.6.18-53.1.14.kgdb/kernel/kgdb.c
--- linux-2.6.18-53.1.14/kernel/kgdb.c  1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/kernel/kgdb.c     2008-06-10 15:39:21.000000000 +0400
@@ -0,0 +1,1778 @@
+/*
+ * kernel/kgdb.c
+ *
+ * Maintainer: Tom Rini <trini@kernel.crashing.org>
+ *
+ * Copyright (C) 2000-2001 VERITAS Software Corporation.
+ * Copyright (C) 2002-2004 Timesys Corporation
+ * Copyright (C) 2003-2004 Amit S. Kale <amitkale@linsyssoft.com>
+ * Copyright (C) 2004 Pavel Machek <pavel@suse.cz>
+ * Copyright (C) 2004-2005 Tom Rini <trini@kernel.crashing.org>
+ * Copyright (C) 2004-2006 LinSysSoft Technologies Pvt. Ltd.
+ * Copyright (C) 2005 Wind River Systems, Inc.
+ *
+ * Contributors at various stages not listed above:
+ *  Jason Wessel ( jason.wessel@windriver.com )
+ *  George Anzinger <george@mvista.com>
+ *  Anurekh Saxena (anurekh.saxena@timesys.com)
+ *  Lake Stevens Instrument Division (Glenn Engel)
+ *  Jim Kingdon, Cygnus Support.
+ *
+ * Original KGDB stub: David Grothe <dave@gcom.com>,
+ * Tigran Aivazian <tigran@sco.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/mm.h>
+#include <linux/threads.h>
+#include <linux/reboot.h>
+#include <asm/system.h>
+#include <asm/ptrace.h>
+#include <asm/uaccess.h>
+#include <linux/kgdb.h>
+#include <asm/atomic.h>
+#include <linux/notifier.h>
+#include <linux/module.h>
+#include <asm/cacheflush.h>
+#include <linux/init.h>
+#include <linux/sysrq.h>
+#include <linux/console.h>
+#include <linux/sched.h>
+#include <asm/byteorder.h>
+
+extern int pid_max;
+/* How many times to count all of the waiting CPUs */
+#define ROUNDUP_WAIT           640000  /* Arbitrary, increase if needed. */
+#define BUF_THREAD_ID_SIZE     16
+
+/*
+ * kgdb_initialized with a value of 1 indicates that kgdb is setup and is
+ * all ready to serve breakpoints and other kernel exceptions.  A value of
+ * -1 indicates that we have tried to initialize early, and need to try
+ * again later.
+ */
+int kgdb_initialized;
+/* Is a host GDB connected to us? */
+int kgdb_connected;
+/* Could we be about to try and access a bad memory location? If so we
+ * also need to flag this has happend. */
+int kgdb_may_fault;
+/* All the KGDB handlers are installed */
+int kgdb_from_module_registered = 0;
+
+/* We provide a kgdb_io_ops structure that may be overriden. */
+struct kgdb_io __attribute__ ((weak)) kgdb_io_ops;
+
+static struct kgdb_io kgdb_io_ops_prev[MAX_KGDB_IO_HANDLERS];
+static int kgdb_io_handler_cnt = 0;
+
+/* Export the following symbols for use with kernel modules */
+EXPORT_SYMBOL(kgdb_io_ops);
+EXPORT_SYMBOL(kgdb_tasklet_breakpoint);
+EXPORT_SYMBOL(kgdb_connected);
+EXPORT_SYMBOL(kgdb_register_io_module);
+EXPORT_SYMBOL(kgdb_unregister_io_module);
+EXPORT_SYMBOL(debugger_active);
+
+/*
+ * Holds information about breakpoints in a kernel. These breakpoints are
+ * added and removed by gdb.
+ */
+struct kgdb_bkpt kgdb_break[MAX_BREAKPOINTS];
+
+static const char hexchars[] = "0123456789abcdef";
+
+static spinlock_t slavecpulocks[NR_CPUS];
+static atomic_t procindebug[NR_CPUS];
+atomic_t kgdb_setting_breakpoint;
+EXPORT_SYMBOL(kgdb_setting_breakpoint);
+struct task_struct *kgdb_usethread, *kgdb_contthread;
+
+int debugger_step;
+atomic_t debugger_active;
+
+/* Our I/O buffers. */
+static char remcom_in_buffer[BUFMAX];
+static char remcom_out_buffer[BUFMAX];
+/* Storage for the registers, in GDB format. */
+static unsigned long gdb_regs[(NUMREGBYTES + sizeof(unsigned long) - 1) /
+                             sizeof(unsigned long)];
+/* Storage of registers for handling a fault. */
+unsigned long kgdb_fault_jmp_regs[NUMCRITREGBYTES / sizeof(unsigned long)]
+ JMP_REGS_ALIGNMENT;
+static int kgdb_notify_reboot(struct notifier_block *this,
+                               unsigned long code ,void *x);
+struct debuggerinfo_struct {
+       void *debuggerinfo;
+       struct task_struct *task;
+} kgdb_info[NR_CPUS];
+
+/* to keep track of the CPU which is doing the single stepping*/
+atomic_t cpu_doing_single_step = ATOMIC_INIT(-1);
+
+atomic_t  kgdb_sync_softlockup[NR_CPUS] = {ATOMIC_INIT(0)};
+
+/* reboot notifier block */
+static struct notifier_block kgdb_reboot_notifier = {
+       .notifier_call  = kgdb_notify_reboot,
+       .next           = NULL,
+       .priority       = INT_MAX,
+};
+
+static int hex(char ch)
+{
+       if ((ch >= 'a') && (ch <= 'f'))
+               return (ch - 'a' + 10);
+       if ((ch >= '0') && (ch <= '9'))
+               return (ch - '0');
+       if ((ch >= 'A') && (ch <= 'F'))
+               return (ch - 'A' + 10);
+       return (-1);
+}
+
+/* scan for the sequence $<data>#<checksum>    */
+static void get_packet(char *buffer)
+{
+       unsigned char checksum;
+       unsigned char xmitcsum;
+       int count;
+       char ch;
+       if (!kgdb_io_ops.read_char)
+               return;
+       do {
+               /* Spin and wait around for the start character, ignore all
+                * other characters */
+               while ((ch = (kgdb_io_ops.read_char())) != '$') ;
+               kgdb_connected = 1;
+               checksum = 0;
+               xmitcsum = -1;
+
+               count = 0;
+
+               /* now, read until a # or end of buffer is found */
+               while (count < (BUFMAX - 1)) {
+                       ch = kgdb_io_ops.read_char();
+                       if (ch == '#')
+                               break;
+                       checksum = checksum + ch;
+                       buffer[count] = ch;
+                       count = count + 1;
+               }
+               buffer[count] = 0;
+
+               if (ch == '#') {
+                       xmitcsum = hex(kgdb_io_ops.read_char()) << 4;
+                       xmitcsum += hex(kgdb_io_ops.read_char());
+
+                       if (checksum != xmitcsum)
+                               /* failed checksum */
+                               kgdb_io_ops.write_char('-');
+                       else
+                               /* successful transfer */
+                               kgdb_io_ops.write_char('+');
+                       if (kgdb_io_ops.flush)
+                               kgdb_io_ops.flush();
+               }
+       } while (checksum != xmitcsum);
+}
+
+/*
+ * Send the packet in buffer.
+ * Check for gdb connection if asked for.
+ */
+static void put_packet(char *buffer)
+{
+       unsigned char checksum;
+       int count;
+       char ch;
+
+       if (!kgdb_io_ops.write_char)
+               return;
+       /* $<packet info>#<checksum>. */
+       while (1) {
+               kgdb_io_ops.write_char('$');
+               checksum = 0;
+               count = 0;
+
+               while ((ch = buffer[count])) {
+                       kgdb_io_ops.write_char(ch);
+                       checksum += ch;
+                       count++;
+               }
+
+               kgdb_io_ops.write_char('#');
+               kgdb_io_ops.write_char(hexchars[checksum >> 4]);
+               kgdb_io_ops.write_char(hexchars[checksum % 16]);
+               if (kgdb_io_ops.flush)
+                       kgdb_io_ops.flush();
+
+               /* Now see what we get in reply. */
+               ch = kgdb_io_ops.read_char();
+
+               if (ch == 3)
+                       ch = kgdb_io_ops.read_char();
+
+               /* If we get an ACK, we are done. */
+               if (ch == '+')
+                       return;
+
+               /* If we get the start of another packet, this means
+                * that GDB is attempting to reconnect.  We will NAK
+                * the packet being sent, and stop trying to send this
+                * packet. */
+               if (ch == '$') {
+                       kgdb_io_ops.write_char('-');
+                       if (kgdb_io_ops.flush)
+                               kgdb_io_ops.flush();
+                       return;
+               }
+       }
+}
+
+/*
+ * convert the memory pointed to by mem into hex, placing result in buf
+ * return a pointer to the last char put in buf (null). May return an error.
+ */
+char *kgdb_mem2hex(char *mem, char *buf, int count)
+{
+       kgdb_may_fault = 1;
+       if ((kgdb_fault_setjmp(kgdb_fault_jmp_regs)) != 0) {
+               kgdb_may_fault = 0;
+               return ERR_PTR(-EINVAL);
+       }
+       /* Accessing some registers in a single load instruction is
+        * required to avoid bad side effects for some I/O registers.
+        */
+       if ((count == 2) && (((long)mem & 1) == 0)) {
+               unsigned short tmp_s = *(unsigned short *)mem;
+               mem += 2;
+#ifdef __BIG_ENDIAN
+               *buf++ = hexchars[(tmp_s >> 12) & 0xf];
+               *buf++ = hexchars[(tmp_s >> 8) & 0xf];
+               *buf++ = hexchars[(tmp_s >> 4) & 0xf];
+               *buf++ = hexchars[tmp_s & 0xf];
+#else
+               *buf++ = hexchars[(tmp_s >> 4) & 0xf];
+               *buf++ = hexchars[tmp_s & 0xf];
+               *buf++ = hexchars[(tmp_s >> 12) & 0xf];
+               *buf++ = hexchars[(tmp_s >> 8) & 0xf];
+#endif
+       } else if ((count == 4) && (((long)mem & 3) == 0)) {
+               unsigned long tmp_l = *(unsigned int *)mem;
+               mem += 4;
+#ifdef __BIG_ENDIAN
+               *buf++ = hexchars[(tmp_l >> 28) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 24) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 20) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 16) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 12) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 8) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 4) & 0xf];
+               *buf++ = hexchars[tmp_l & 0xf];
+#else
+               *buf++ = hexchars[(tmp_l >> 4) & 0xf];
+               *buf++ = hexchars[tmp_l & 0xf];
+               *buf++ = hexchars[(tmp_l >> 12) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 8) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 20) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 16) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 28) & 0xf];
+               *buf++ = hexchars[(tmp_l >> 24) & 0xf];
+#endif
+#ifdef CONFIG_64BIT
+       } else if ((count == 8) && (((long)mem & 7) == 0)) {
+               unsigned long long tmp_ll = *(unsigned long long *)mem;
+               mem += 8;
+#ifdef __BIG_ENDIAN
+               *buf++ = hexchars[(tmp_ll >> 60) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 56) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 52) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 48) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 44) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 40) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 36) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 32) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 28) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 24) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 20) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 16) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 12) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 8) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 4) & 0xf];
+               *buf++ = hexchars[tmp_ll & 0xf];
+#else
+               *buf++ = hexchars[(tmp_ll >> 4) & 0xf];
+               *buf++ = hexchars[tmp_ll & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 12) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 8) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 20) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 16) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 28) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 24) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 36) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 32) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 44) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 40) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 52) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 48) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 60) & 0xf];
+               *buf++ = hexchars[(tmp_ll >> 56) & 0xf];
+#endif
+#endif
+       } else {
+               while (count-- > 0) {
+                       unsigned char ch = *mem++;
+                       *buf++ = hexchars[ch >> 4];
+                       *buf++ = hexchars[ch & 0xf];
+               }
+       }
+       kgdb_may_fault = 0;
+       *buf = 0;
+       return (buf);
+}
+
+/*
+ * Copy the binary array pointed to by buf into mem.  Fix $, #, and
+ * 0x7d escaped with 0x7d.  Return a pointer to the character after
+ * the last byte written.
+ */
+static char *kgdb_ebin2mem(char *buf, char *mem, int count)
+{
+       kgdb_may_fault = 1;
+       if ((kgdb_fault_setjmp(kgdb_fault_jmp_regs)) != 0) {
+               kgdb_may_fault = 0;
+               return ERR_PTR(-EINVAL);
+       }
+       for (; count > 0; count--, buf++) {
+               if (*buf == 0x7d)
+                       *mem++ = *(++buf) ^ 0x20;
+               else
+                       *mem++ = *buf;
+       }
+       kgdb_may_fault = 0;
+       return mem;
+}
+
+/*
+ * convert the hex array pointed to by buf into binary to be placed in mem
+ * return a pointer to the character AFTER the last byte written
+ * May return an error.
+ */
+char *kgdb_hex2mem(char *buf, char *mem, int count)
+{
+       kgdb_may_fault = 1;
+       if ((kgdb_fault_setjmp(kgdb_fault_jmp_regs)) != 0) {
+               kgdb_may_fault = 0;
+               return ERR_PTR(-EINVAL);
+       }
+       if ((count == 2) && (((long)mem & 1) == 0)) {
+               unsigned short tmp_s = 0;
+#ifdef __BIG_ENDIAN
+               tmp_s |= hex(*buf++) << 12;
+               tmp_s |= hex(*buf++) << 8;
+               tmp_s |= hex(*buf++) << 4;
+               tmp_s |= hex(*buf++);
+#else
+               tmp_s |= hex(*buf++) << 4;
+               tmp_s |= hex(*buf++);
+               tmp_s |= hex(*buf++) << 12;
+               tmp_s |= hex(*buf++) << 8;
+#endif
+               *(unsigned short *)mem = tmp_s;
+               mem += 2;
+       } else if ((count == 4) && (((long)mem & 3) == 0)) {
+               unsigned long tmp_l = 0;
+#ifdef __BIG_ENDIAN
+               tmp_l |= hex(*buf++) << 28;
+               tmp_l |= hex(*buf++) << 24;
+               tmp_l |= hex(*buf++) << 20;
+               tmp_l |= hex(*buf++) << 16;
+               tmp_l |= hex(*buf++) << 12;
+               tmp_l |= hex(*buf++) << 8;
+               tmp_l |= hex(*buf++) << 4;
+               tmp_l |= hex(*buf++);
+#else
+               tmp_l |= hex(*buf++) << 4;
+               tmp_l |= hex(*buf++);
+               tmp_l |= hex(*buf++) << 12;
+               tmp_l |= hex(*buf++) << 8;
+               tmp_l |= hex(*buf++) << 20;
+               tmp_l |= hex(*buf++) << 16;
+               tmp_l |= hex(*buf++) << 28;
+               tmp_l |= hex(*buf++) << 24;
+#endif
+               *(unsigned long *)mem = tmp_l;
+               mem += 4;
+       } else {
+               int i;
+               for (i = 0; i < count; i++) {
+                       unsigned char ch = hex(*buf++) << 4;
+                       ch |= hex(*buf++);
+                       *mem++ = ch;
+               }
+       }
+       kgdb_may_fault = 0;
+       return (mem);
+}
+
+/*
+ * While we find nice hex chars, build a long_val.
+ * Return number of chars processed.
+ */
+int kgdb_hex2long(char **ptr, long *long_val)
+{
+       int hex_val, num = 0;
+
+       *long_val = 0;
+
+       while (**ptr) {
+               hex_val = hex(**ptr);
+               if (hex_val >= 0) {
+                       *long_val = (*long_val << 4) | hex_val;
+                       num++;
+               } else
+                       break;
+
+               (*ptr)++;
+       }
+
+       return (num);
+}
+
+/* Write memory due to an 'M' or 'X' packet. */
+static char *write_mem_msg(int binary)
+{
+       char *ptr = &remcom_in_buffer[1];
+       unsigned long addr, length;
+
+       if (kgdb_hex2long(&ptr, &addr) > 0 && *(ptr++) == ',' &&
+           kgdb_hex2long(&ptr, &length) > 0 && *(ptr++) == ':') {
+               if (binary)
+                       ptr = kgdb_ebin2mem(ptr, (char *)addr, length);
+               else
+                       ptr = kgdb_hex2mem(ptr, (char *)addr, length);
+               if (CACHE_FLUSH_IS_SAFE)
+                       flush_icache_range(addr, addr + length + 1);
+               if (IS_ERR(ptr))
+                       return ptr;
+               return NULL;
+       }
+
+       return ERR_PTR(-EINVAL);
+}
+
+static inline char *pack_hex_byte(char *pkt, int byte)
+{
+       *pkt++ = hexchars[(byte >> 4) & 0xf];
+       *pkt++ = hexchars[(byte & 0xf)];
+       return pkt;
+}
+
+static inline void error_packet(char *pkt, int error)
+{
+       error = -error;
+       pkt[0] = 'E';
+       pkt[1] = hexchars[(error / 10)];
+       pkt[2] = hexchars[(error % 10)];
+       pkt[3] = '\0';
+}
+
+static char *pack_threadid(char *pkt, threadref * id)
+{
+       char *limit;
+       unsigned char *altid;
+
+       altid = (unsigned char *)id;
+       limit = pkt + BUF_THREAD_ID_SIZE;
+       while (pkt < limit)
+               pkt = pack_hex_byte(pkt, *altid++);
+
+       return pkt;
+}
+
+void int_to_threadref(threadref * id, int value)
+{
+       unsigned char *scan;
+       int i = 4;
+
+       scan = (unsigned char *)id;
+       while (i--)
+               *scan++ = 0;
+       *scan++ = (value >> 24) & 0xff;
+       *scan++ = (value >> 16) & 0xff;
+       *scan++ = (value >> 8) & 0xff;
+       *scan++ = (value & 0xff);
+}
+
+static struct task_struct *getthread(struct pt_regs *regs, int tid)
+{
+       if (last_pid == 0)
+               return current;
+
+       if (num_online_cpus() &&
+           (tid >= pid_max + num_online_cpus() + kgdb_ops->shadowth))
+               return NULL;
+
+       if (kgdb_ops->shadowth && (tid >= pid_max + num_online_cpus()))
+               return kgdb_get_shadow_thread(regs, tid - pid_max -
+                                             num_online_cpus());
+
+       if (tid >= pid_max)
+               return idle_task(tid - pid_max);
+
+       if (!tid)
+               return NULL;
+
+       return find_task_by_pid(tid);
+}
+
+#ifdef CONFIG_SMP
+static void kgdb_wait(struct pt_regs *regs)
+{
+       unsigned long flags;
+       int processor;
+
+       local_irq_save(flags);
+       processor = smp_processor_id();
+       kgdb_info[processor].debuggerinfo = regs;
+       kgdb_info[processor].task = current;
+       atomic_set(&procindebug[processor], 1);
+       atomic_set(&kgdb_sync_softlockup[smp_processor_id()], 1);
+
+       /* Wait till master processor goes completely into the debugger.
+        * FIXME: this looks racy */
+       while (!atomic_read(&procindebug[atomic_read(&debugger_active) - 1])) {
+               int i = 10;     /* an arbitrary number */
+
+               while (--i)
+                       cpu_relax();
+       }
+
+       /* Wait till master processor is done with debugging */
+       spin_lock(&slavecpulocks[processor]);
+
+       /* This has been taken from x86 kgdb implementation and
+        * will be needed by architectures that have SMP support
+        */
+       kgdb_correct_hw_break();
+
+       kgdb_info[processor].debuggerinfo = NULL;
+       kgdb_info[processor].task = NULL;
+
+       /* Signal the master processor that we are done */
+       atomic_set(&procindebug[processor], 0);
+       spin_unlock(&slavecpulocks[processor]);
+       local_irq_restore(flags);
+}
+#endif
+
+int kgdb_get_mem(char *addr, unsigned char *buf, int count)
+{
+       kgdb_may_fault = 1;
+       if ((kgdb_fault_setjmp(kgdb_fault_jmp_regs)) != 0) {
+               kgdb_may_fault = 0;
+               return -EINVAL;
+       }
+       while (count) {
+               if ((unsigned long)addr < TASK_SIZE)
+                       return -EINVAL;
+               *buf++ = *addr++;
+               count--;
+       }
+       kgdb_may_fault = 0;
+       return 0;
+}
+
+int kgdb_set_mem(char *addr, unsigned char *buf, int count)
+{
+       kgdb_may_fault = 1;
+       if ((kgdb_fault_setjmp(kgdb_fault_jmp_regs)) != 0) {
+               kgdb_may_fault = 0;
+               return -EINVAL;
+       }
+       while (count) {
+               if ((unsigned long)addr < TASK_SIZE)
+                       return -EINVAL;
+               *addr++ = *buf++;
+               count--;
+       }
+       kgdb_may_fault = 0;
+       return 0;
+}
+int kgdb_activate_sw_breakpoints(void)
+{
+       int i;
+       int error = 0;
+       unsigned long addr;
+       for (i = 0; i < MAX_BREAKPOINTS; i++) {
+               if (kgdb_break[i].state != bp_set)
+                       continue;
+               addr = kgdb_break[i].bpt_addr;
+               if ((error = kgdb_arch_set_breakpoint(addr,
+                                       kgdb_break[i].saved_instr)))
+                       return error;
+
+               if (CACHE_FLUSH_IS_SAFE) {
+                       if (current->mm && addr < TASK_SIZE)
+                               flush_cache_range(current->mm->mmap_cache,
+                                               addr, addr + BREAK_INSTR_SIZE);
+                       else
+                               flush_icache_range(addr, addr +
+                                               BREAK_INSTR_SIZE);
+               }
+
+               kgdb_break[i].state = bp_active;
+        }
+       return 0;
+}
+
+static int kgdb_set_sw_break(unsigned long addr)
+{
+       int i, breakno = -1;
+       int error = 0;
+       if ((error = kgdb_validate_break_address(addr)) < 0)
+               return error;
+       for (i = 0; i < MAX_BREAKPOINTS; i++) {
+               if ((kgdb_break[i].state == bp_set) &&
+                       (kgdb_break[i].bpt_addr == addr))
+                       return -EEXIST;
+       }
+       for (i = 0; i < MAX_BREAKPOINTS; i++) {
+               if (kgdb_break[i].state == bp_removed &&
+                               kgdb_break[i].bpt_addr == addr) {
+                       breakno = i;
+                       break;
+               }
+       }
+
+       if (breakno == -1) {
+               for (i = 0; i < MAX_BREAKPOINTS; i++) {
+                       if (kgdb_break[i].state == bp_none) {
+                               breakno = i;
+                               break;
+                       }
+               }
+       }
+       if (breakno == -1)
+               return -E2BIG;
+
+       kgdb_break[breakno].state = bp_set;
+       kgdb_break[breakno].type = bp_breakpoint;
+       kgdb_break[breakno].bpt_addr = addr;
+
+       return 0;
+}
+
+int kgdb_deactivate_sw_breakpoints(void)
+{
+       int i;
+       int error = 0;
+       unsigned long addr;
+       for (i = 0; i < MAX_BREAKPOINTS; i++) {
+               if (kgdb_break[i].state != bp_active)
+                       continue;
+               addr = kgdb_break[i].bpt_addr;
+               if ((error = kgdb_arch_remove_breakpoint(addr,
+                                       kgdb_break[i].saved_instr)))
+                       return error;
+
+               if (CACHE_FLUSH_IS_SAFE && current->mm &&
+                               addr < TASK_SIZE)
+                       flush_cache_range(current->mm->mmap_cache,
+                                       addr, addr + BREAK_INSTR_SIZE);
+               else if (CACHE_FLUSH_IS_SAFE)
+                       flush_icache_range(addr,
+                                       addr + BREAK_INSTR_SIZE);
+               kgdb_break[i].state = bp_set;
+       }
+       return 0;
+}
+
+static int kgdb_remove_sw_break(unsigned long addr)
+{
+       int i;
+
+       for (i = 0; i < MAX_BREAKPOINTS; i++) {
+               if ((kgdb_break[i].state == bp_set) &&
+                       (kgdb_break[i].bpt_addr == addr)) {
+                       kgdb_break[i].state = bp_removed;
+                       return 0;
+               }
+       }
+       return -ENOENT;
+}
+
+int kgdb_isremovedbreak(unsigned long addr)
+{
+       int i;
+       for (i = 0; i < MAX_BREAKPOINTS; i++) {
+               if ((kgdb_break[i].state == bp_removed) &&
+                       (kgdb_break[i].bpt_addr == addr)) {
+                       return 1;
+               }
+       }
+       return 0;
+}
+
+int remove_all_break(void)
+{
+       int i;
+       int error;
+       unsigned long addr;
+
+       /* Clear memory breakpoints. */
+       for (i = 0; i < MAX_BREAKPOINTS; i++) {
+               if (kgdb_break[i].state != bp_set)
+                       continue;
+               addr = kgdb_break[i].bpt_addr;
+               if ((error = kgdb_arch_remove_breakpoint(addr,
+                                       kgdb_break[i].saved_instr)))
+                       return error;
+               kgdb_break[i].state = bp_removed;
+       }
+
+       /* Clear hardware breakpoints. */
+       kgdb_remove_all_hw_break();
+
+       return 0;
+}
+
+static inline int shadow_pid(int realpid)
+{
+       if (realpid) {
+               return realpid;
+       }
+       return pid_max + smp_processor_id();
+}
+
+static char gdbmsgbuf[BUFMAX + 1];
+static void kgdb_msg_write(const char *s, int len)
+{
+       int i;
+       int wcount;
+       char *bufptr;
+
+       /* 'O'utput */
+       gdbmsgbuf[0] = 'O';
+
+       /* Fill and send buffers... */
+       while (len > 0) {
+               bufptr = gdbmsgbuf + 1;
+
+               /* Calculate how many this time */
+               if ((len << 1) > (BUFMAX - 2))
+                       wcount = (BUFMAX - 2) >> 1;
+               else
+                       wcount = len;
+
+               /* Pack in hex chars */
+               for (i = 0; i < wcount; i++)
+                       bufptr = pack_hex_byte(bufptr, s[i]);
+               *bufptr = '\0';
+
+               /* Move up */
+               s += wcount;
+               len -= wcount;
+
+               /* Write packet */
+               put_packet(gdbmsgbuf);
+       }
+}
+
+/*
+ * This function does all command procesing for interfacing to gdb.
+ *
+ * Locking hierarchy:
+ *     interface locks, if any (begin_session)
+ *     kgdb lock (debugger_active)
+ *
+ * Note that since we can be in here prior to our cpumask being filled
+ * out, we err on the side of caution and loop over NR_CPUS instead
+ * of a for_each_online_cpu.
+ *
+ */
+int kgdb_handle_exception(int ex_vector, int signo, int err_code,
+                         struct pt_regs *linux_regs)
+{
+       unsigned long length, addr;
+       char *ptr;
+       unsigned long flags;
+       unsigned i;
+       long threadid;
+       threadref thref;
+       struct task_struct *thread = NULL;
+       unsigned procid;
+       int numshadowth = num_online_cpus() + kgdb_ops->shadowth;
+       long kgdb_usethreadid = 0;
+       int error = 0, all_cpus_synced = 0;
+       struct pt_regs *shadowregs;
+       int processor = smp_processor_id();
+       void *local_debuggerinfo;
+
+       /* Panic on recursive debugger calls. */
+       if (atomic_read(&debugger_active) == smp_processor_id() + 1)
+               return 0;
+
+      acquirelock:
+
+       /* Call the I/O drivers pre_exception routine if the I/O
+        * driver defined one
+        */
+       if (kgdb_io_ops.pre_exception)
+               kgdb_io_ops.pre_exception();
+
+       /*
+        * Interrupts will be restored by the 'trap return' code, except when
+        * single stepping.
+        */
+       local_irq_save(flags);
+
+       /* Hold debugger_active */
+       procid = smp_processor_id();
+
+       while (cmpxchg(&atomic_read(&debugger_active), 0, (procid + 1)) != 0) {
+               int i = 25;     /* an arbitrary number */
+
+               while (--i)
+                       cpu_relax();
+
+               if (atomic_read(&cpu_doing_single_step) != -1 &&
+                               atomic_read(&cpu_doing_single_step) != procid)
+                       udelay(1);
+       }
+
+       atomic_set(&kgdb_sync_softlockup[smp_processor_id()], 1);
+
+       /*
+        * Don't enter if the last instance of the exception handler wanted to
+        * come into the debugger again.
+        */
+       if (atomic_read(&cpu_doing_single_step) != -1 &&
+           atomic_read(&cpu_doing_single_step) != procid) {
+               atomic_set(&debugger_active, 0);
+               local_irq_restore(flags);
+               goto acquirelock;
+       }
+
+       /*
+       * Don't enter if we have hit a removed breakpoint.
+       */
+       if (kgdb_skipexception(ex_vector, linux_regs))
+               goto kgdb_restore;
+
+       kgdb_info[processor].debuggerinfo = linux_regs;
+       kgdb_info[processor].task = current;
+
+       kgdb_disable_hw_debug(linux_regs);
+
+       if (!debugger_step || !kgdb_contthread)
+               for (i = 0; i < NR_CPUS; i++)
+                       spin_lock(&slavecpulocks[i]);
+
+       /* Make sure we get the other CPUs */
+       if (!debugger_step || !kgdb_contthread)
+               kgdb_roundup_cpus(flags);
+
+       /* spin_lock code is good enough as a barrier so we don't
+        * need one here */
+       atomic_set(&procindebug[processor], 1);
+
+       /* Wait a reasonable time for the other CPUs to be notified and
+        * be waiting for us.  Very early on this could be imperfect
+        * as num_online_cpus() could be 0.*/
+       for (i = 0; i < ROUNDUP_WAIT; i++) {
+               int cpu, num = 0;
+               for (cpu = 0; cpu < NR_CPUS; cpu++) {
+                       if (atomic_read(&procindebug[cpu]))
+                               num++;
+               }
+               if (num >= num_online_cpus()) {
+                       all_cpus_synced = 1;
+                       break;
+               }
+       }
+
+       /* Clear the out buffer. */
+       memset(remcom_out_buffer, 0, sizeof(remcom_out_buffer));
+
+       /* Master processor is completely in the debugger */
+       kgdb_post_master_code(linux_regs, ex_vector, err_code);
+       kgdb_deactivate_sw_breakpoints();
+       debugger_step = 0;
+       kgdb_contthread = NULL;
+
+       if (kgdb_connected) {
+               /* If we're still unable to roundup all of the CPUs,
+                * send an 'O' packet informing the user again. */
+               if (!all_cpus_synced)
+                       kgdb_msg_write("Not all CPUs have been synced for "
+                                      "KGDB\n", 39);
+               /* Reply to host that an exception has occurred */
+               ptr = remcom_out_buffer;
+               *ptr++ = 'T';
+               *ptr++ = hexchars[(signo >> 4) % 16];
+               *ptr++ = hexchars[signo % 16];
+               ptr += strlen(strcpy(ptr, "thread:"));
+               int_to_threadref(&thref, shadow_pid(current->pid));
+               ptr = pack_threadid(ptr, &thref);
+               *ptr++ = ';';
+
+               put_packet(remcom_out_buffer);
+       }
+
+       kgdb_usethread = kgdb_info[processor].task;
+       kgdb_usethreadid = shadow_pid(kgdb_info[processor].task->pid);
+
+       while (kgdb_io_ops.read_char) {
+               char *bpt_type;
+               error = 0;
+
+               /* Clear the out buffer. */
+               memset(remcom_out_buffer, 0, sizeof(remcom_out_buffer));
+
+               get_packet(remcom_in_buffer);
+
+               switch (remcom_in_buffer[0]) {
+               case '?':
+                       /* We know that this packet is only sent
+                        * during initial connect.  So to be safe,
+                        * we clear out our breakpoints now incase
+                        * GDB is reconnecting. */
+                       remove_all_break();
+                       /* Also, if we haven't been able to roundup all
+                        * CPUs, send an 'O' packet informing the user
+                        * as much.  Only need to do this once. */
+                       if (!all_cpus_synced)
+                               kgdb_msg_write("Not all CPUs have been "
+                                              "synced for KGDB\n", 39);
+                       remcom_out_buffer[0] = 'S';
+                       remcom_out_buffer[1] = hexchars[signo >> 4];
+                       remcom_out_buffer[2] = hexchars[signo % 16];
+                       break;
+
+               case 'g':       /* return the value of the CPU registers */
+                       thread = kgdb_usethread;
+
+                       if (!thread) {
+                               thread = kgdb_info[processor].task;
+                               local_debuggerinfo =
+                                   kgdb_info[processor].debuggerinfo;
+                       } else {
+                               local_debuggerinfo = NULL;
+                               for (i = 0; i < NR_CPUS; i++) {
+                                       /* Try to find the task on some other
+                                        * or possibly this node if we do not
+                                        * find the matching task then we try
+                                        * to approximate the results.
+                                        */
+                                       if (thread == kgdb_info[i].task)
+                                               local_debuggerinfo =
+                                                   kgdb_info[i].debuggerinfo;
+                               }
+                       }
+
+                       /* All threads that don't have debuggerinfo should be
+                        * in __schedule() sleeping, since all other CPUs
+                        * are in kgdb_wait, and thus have debuggerinfo. */
+                       if (kgdb_ops->shadowth &&
+                           kgdb_usethreadid >= pid_max + num_online_cpus()) {
+                               shadowregs = kgdb_shadow_regs(linux_regs,
+                                                             kgdb_usethreadid -
+                                                             pid_max -
+                                                             num_online_cpus
+                                                             ());
+                               if (!shadowregs) {
+                                       error_packet(remcom_out_buffer,
+                                                    -EINVAL);
+                                       break;
+                               }
+                               regs_to_gdb_regs(gdb_regs, shadowregs);
+                       } else if (local_debuggerinfo)
+                               regs_to_gdb_regs(gdb_regs, local_debuggerinfo);
+                       else {
+                               /* Pull stuff saved during
+                                * switch_to; nothing else is
+                                * accessible (or even particularly relevant).
+                                * This should be enough for a stack trace. */
+                               sleeping_thread_to_gdb_regs(gdb_regs, thread);
+                       }
+                       kgdb_mem2hex((char *)gdb_regs, remcom_out_buffer,
+                                    NUMREGBYTES);
+                       break;
+
+                       /* set the value of the CPU registers - return OK */
+               case 'G':
+                       kgdb_hex2mem(&remcom_in_buffer[1], (char *)gdb_regs,
+                                    NUMREGBYTES);
+
+                       if (kgdb_usethread && kgdb_usethread != current)
+                               error_packet(remcom_out_buffer, -EINVAL);
+                       else {
+                               gdb_regs_to_regs(gdb_regs, linux_regs);
+                               strcpy(remcom_out_buffer, "OK");
+                       }
+                       break;
+
+                       /* mAA..AA,LLLL  Read LLLL bytes at address AA..AA */
+               case 'm':
+                       ptr = &remcom_in_buffer[1];
+                       if (kgdb_hex2long(&ptr, &addr) > 0 && *ptr++ == ',' &&
+                           kgdb_hex2long(&ptr, &length) > 0) {
+                               if (IS_ERR(ptr = kgdb_mem2hex((char *)addr,
+                                                             remcom_out_buffer,
+                                                             length)))
+                                       error_packet(remcom_out_buffer,
+                                                    PTR_ERR(ptr));
+                       } else
+                               error_packet(remcom_out_buffer, -EINVAL);
+                       break;
+
+                       /* MAA..AA,LLLL: Write LLLL bytes at address AA..AA */
+               case 'M':
+                       if (IS_ERR(ptr = write_mem_msg(0)))
+                               error_packet(remcom_out_buffer, PTR_ERR(ptr));
+                       else
+                               strcpy(remcom_out_buffer, "OK");
+                       break;
+                       /* XAA..AA,LLLL: Write LLLL bytes at address AA..AA */
+               case 'X':
+                       if (IS_ERR(ptr = write_mem_msg(1)))
+                               error_packet(remcom_out_buffer, PTR_ERR(ptr));
+                       else
+                               strcpy(remcom_out_buffer, "OK");
+                       break;
+
+                       /* kill or detach. KGDB should treat this like a
+                        * continue.
+                        */
+               case 'D':
+                       if ((error = remove_all_break()) < 0) {
+                               error_packet(remcom_out_buffer, error);
+                       } else {
+                               strcpy(remcom_out_buffer, "OK");
+                               kgdb_connected = 0;
+                       }
+                       put_packet(remcom_out_buffer);
+                       goto default_handle;
+
+               case 'k':
+                       /* Don't care about error from remove_all_break */
+                       remove_all_break();
+                       kgdb_connected = 0;
+                       goto default_handle;
+
+                       /* Reboot */
+               case 'R':
+                       /* For now, only honor R0 */
+                       if (strcmp(remcom_in_buffer, "R0") == 0) {
+                               printk(KERN_CRIT "Executing reboot\n");
+                               strcpy(remcom_out_buffer, "OK");
+                               put_packet(remcom_out_buffer);
+                               emergency_sync();
+                               /* Execution should not return from
+                                * machine_restart()
+                                */
+                               machine_restart(NULL);
+                               kgdb_connected = 0;
+                               goto default_handle;
+                       }
+
+                       /* query */
+               case 'q':
+                       switch (remcom_in_buffer[1]) {
+                       case 's':
+                       case 'f':
+                               if (memcmp(remcom_in_buffer + 2, "ThreadInfo",
+                                          10)) {
+                                       error_packet(remcom_out_buffer,
+                                                    -EINVAL);
+                                       break;
+                               }
+
+                               /*
+                                * If we have not yet completed in
+                                * pidhash_init() there isn't much we
+                                * can give back.
+                                */
+                               if (last_pid == 0) {
+                                       if (remcom_in_buffer[1] == 'f')
+                                               strcpy(remcom_out_buffer,
+                                                      "m0000000000000001");
+                                       break;
+                               }
+
+                               if (remcom_in_buffer[1] == 'f') {
+                                       threadid = 1;
+                               }
+                               remcom_out_buffer[0] = 'm';
+                               ptr = remcom_out_buffer + 1;
+                               for (i = 0; i < 17 && threadid < pid_max +
+                                    numshadowth; threadid++) {
+                                       thread = getthread(linux_regs,
+                                                          threadid);
+                                       if (thread) {
+                                               int_to_threadref(&thref,
+                                                                threadid);
+                                               pack_threadid(ptr, &thref);
+                                               ptr += 16;
+                                               *(ptr++) = ',';
+                                               i++;
+                                       }
+                               }
+                               *(--ptr) = '\0';
+                               break;
+
+                       case 'C':
+                               /* Current thread id */
+                               strcpy(remcom_out_buffer, "QC");
+
+                               threadid = shadow_pid(current->pid);
+
+                               int_to_threadref(&thref, threadid);
+                               pack_threadid(remcom_out_buffer + 2, &thref);
+                               break;
+                       case 'T':
+                               if (memcmp(remcom_in_buffer + 1,
+                                          "ThreadExtraInfo,", 16)) {
+                                       error_packet(remcom_out_buffer,
+                                                    -EINVAL);
+                                       break;
+                               }
+                               threadid = 0;
+                               ptr = remcom_in_buffer + 17;
+                               kgdb_hex2long(&ptr, &threadid);
+                               if (!getthread(linux_regs, threadid)) {
+                                       error_packet(remcom_out_buffer,
+                                                    -EINVAL);
+                                       break;
+                               }
+                               if (threadid < pid_max) {
+                                       kgdb_mem2hex(getthread(linux_regs,
+                                                              threadid)->comm,
+                                                    remcom_out_buffer, 16);
+                               } else if (threadid >= pid_max +
+                                          num_online_cpus()) {
+                                       kgdb_shadowinfo(linux_regs,
+                                                       remcom_out_buffer,
+                                                       threadid - pid_max -
+                                                       num_online_cpus());
+                               } else {
+                                       static char tmpstr[23 +
+                                                          BUF_THREAD_ID_SIZE];
+                                       sprintf(tmpstr, "Shadow task %d"
+                                               " for pid 0",
+                                               (int)(threadid - pid_max));
+                                       kgdb_mem2hex(tmpstr, remcom_out_buffer,
+                                                    strlen(tmpstr));
+                               }
+                               break;
+                       }
+                       break;
+
+                       /* task related */
+               case 'H':
+                       switch (remcom_in_buffer[1]) {
+                       case 'g':
+                               ptr = &remcom_in_buffer[2];
+                               kgdb_hex2long(&ptr, &threadid);
+                               thread = getthread(linux_regs, threadid);
+                               if (!thread && threadid > 0) {
+                                       error_packet(remcom_out_buffer,
+                                                    -EINVAL);
+                                       break;
+                               }
+                               kgdb_usethread = thread;
+                               kgdb_usethreadid = threadid;
+                               strcpy(remcom_out_buffer, "OK");
+                               break;
+
+                       case 'c':
+                               ptr = &remcom_in_buffer[2];
+                               kgdb_hex2long(&ptr, &threadid);
+                               if (!threadid) {
+                                       kgdb_contthread = NULL;
+                               } else {
+                                       thread = getthread(linux_regs,
+                                                          threadid);
+                                       if (!thread && threadid > 0) {
+                                               error_packet(remcom_out_buffer,
+                                                            -EINVAL);
+                                               break;
+                                       }
+                                       kgdb_contthread = thread;
+                               }
+                               strcpy(remcom_out_buffer, "OK");
+                               break;
+                       }
+                       break;
+
+                       /* Query thread status */
+               case 'T':
+                       ptr = &remcom_in_buffer[1];
+                       kgdb_hex2long(&ptr, &threadid);
+                       thread = getthread(linux_regs, threadid);
+                       if (thread)
+                               strcpy(remcom_out_buffer, "OK");
+                       else
+                               error_packet(remcom_out_buffer, -EINVAL);
+                       break;
+               /* Since GDB-5.3, it's been drafted that '0' is a software
+                * breakpoint, '1' is a hardware breakpoint, so let's do
+                * that.
+                */
+               case 'z':
+               case 'Z':
+                       bpt_type = &remcom_in_buffer[1];
+                       ptr = &remcom_in_buffer[2];
+
+                       if (kgdb_ops->set_hw_breakpoint && *bpt_type >= '1') {
+                               /* Unsupported */
+                               if (*bpt_type > '4')
+                                       break;
+                       } else if (*bpt_type != '0' && *bpt_type != '1')
+                               /* Unsupported. */
+                               break;
+                       /* Test if this is a hardware breakpoint, and
+                        * if we support it. */
+                       if (*bpt_type == '1' &&
+                           !kgdb_ops->flags & KGDB_HW_BREAKPOINT)
+                               /* Unsupported. */
+                               break;
+
+                       if (*(ptr++) != ',') {
+                               error_packet(remcom_out_buffer, -EINVAL);
+                               break;
+                       } else if (kgdb_hex2long(&ptr, &addr)) {
+                               if (*(ptr++) != ',' ||
+                                   !kgdb_hex2long(&ptr, &length)) {
+                                       error_packet(remcom_out_buffer,
+                                                    -EINVAL);
+                                       break;
+                               }
+                       } else {
+                               error_packet(remcom_out_buffer, -EINVAL);
+                               break;
+                       }
+
+                       if (remcom_in_buffer[0] == 'Z' && *bpt_type == '0')
+                               error = kgdb_set_sw_break(addr);
+                       else if (remcom_in_buffer[0] == 'Z' && *bpt_type == '1')
+                               error = kgdb_set_hw_break(addr);
+                       else if (remcom_in_buffer[0] == 'z' && *bpt_type == '0')
+                               error = kgdb_remove_sw_break(addr);
+                       else if (remcom_in_buffer[0] == 'z' && *bpt_type == '1')
+                               error = kgdb_remove_hw_break(addr);
+                       else if (remcom_in_buffer[0] == 'Z')
+                               error = kgdb_ops->set_hw_breakpoint(addr,
+                                                                   (int)length,
+                                                                   *bpt_type);
+                       else if (remcom_in_buffer[0] == 'z')
+                               error = kgdb_ops->remove_hw_breakpoint(addr,
+                                                                      (int)
+                                                                      length,
+                                                                      *bpt_type);
+
+                       if (error == 0)
+                               strcpy(remcom_out_buffer, "OK");
+                       else
+                               error_packet(remcom_out_buffer, error);
+
+                       break;
+               case 'c':
+               case 's':
+                       if (kgdb_contthread && kgdb_contthread != current) {
+                               /* Can't switch threads in kgdb */
+                               error_packet(remcom_out_buffer, -EINVAL);
+                               break;
+                       }
+                       kgdb_activate_sw_breakpoints();
+                       /* Followthrough to default processing */
+               default:
+                     default_handle:
+                       error = kgdb_arch_handle_exception(ex_vector, signo,
+                                                          err_code,
+                                                          remcom_in_buffer,
+                                                          remcom_out_buffer,
+                                                          linux_regs);
+
+                       if (error >= 0 || remcom_in_buffer[0] == 'D' ||
+                           remcom_in_buffer[0] == 'k')
+                               goto kgdb_exit;
+
+               }               /* switch */
+
+               /* reply to the request */
+               put_packet(remcom_out_buffer);
+       }
+
+      kgdb_exit:
+       /* Call the I/O driver's post_exception routine if the I/O
+        * driver defined one.
+        */
+       if (kgdb_io_ops.post_exception)
+               kgdb_io_ops.post_exception();
+
+       kgdb_info[processor].debuggerinfo = NULL;
+       kgdb_info[processor].task = NULL;
+       atomic_set(&procindebug[processor], 0);
+
+       if (!debugger_step || !kgdb_contthread) {
+               for (i = 0; i < NR_CPUS; i++)
+                       spin_unlock(&slavecpulocks[i]);
+               /* Wait till all the processors have quit
+                * from the debugger. */
+               for (i = 0; i < NR_CPUS; i++) {
+                       while (atomic_read(&procindebug[i])) {
+                               int j = 10;     /* an arbitrary number */
+
+                               while (--j)
+                                       cpu_relax();
+                       }
+               }
+       }
+
+#ifdef CONFIG_SMP
+       /* This delay has a real purpose.  The problem is that if you
+        * are single-stepping, you are sending an NMI to all the
+        * other processors to stop them.  Interrupts come in, but
+        * don't get handled.  Then you let them go just long enough
+        * to get into their interrupt routines and use up some stack.
+        * You stop them again, and then do the same thing.  After a
+        * while you blow the stack on the other processors.  This
+        * delay gives some time for interrupts to be cleared out on
+        * the other processors.
+        */
+       if (debugger_step)
+               mdelay(2);
+#endif
+kgdb_restore:
+       /* Free debugger_active */
+       atomic_set(&debugger_active, 0);
+       local_irq_restore(flags);
+
+       return error;
+}
+
+/*
+ * GDB places a breakpoint at this function to know dynamically
+ * loaded objects. It's not defined static so that only one instance with this
+ * name exists in the kernel.
+ */
+
+int module_event(struct notifier_block *self, unsigned long val, void *data)
+{
+       return 0;
+}
+
+static struct notifier_block kgdb_module_load_nb = {
+       .notifier_call = module_event,
+};
+
+void kgdb_nmihook(int cpu, void *regs)
+{
+#ifdef CONFIG_SMP
+       if (!atomic_read(&procindebug[cpu]) && atomic_read(&debugger_active) != (cpu + 1))
+               kgdb_wait((struct pt_regs *)regs);
+#endif
+}
+
+/*
+ * This is called when a panic happens.  All we need to do is
+ * breakpoint().
+ */
+static int kgdb_panic_notify(struct notifier_block *self, unsigned long cmd,
+                            void *ptr)
+{
+       breakpoint();
+
+       return 0;
+}
+
+static struct notifier_block kgdb_panic_notifier = {
+       .notifier_call = kgdb_panic_notify,
+};
+
+/*
+ * Initialization that needs to be done in either of our entry points.
+ */
+static void __init kgdb_internal_init(void)
+{
+       int i;
+
+       /* Initialize our spinlocks. */
+       for (i = 0; i < NR_CPUS; i++)
+               spin_lock_init(&slavecpulocks[i]);
+
+       for (i = 0; i < MAX_BREAKPOINTS; i++)
+               kgdb_break[i].state = bp_none;
+
+       /* Initialize the I/O handles */
+       memset(&kgdb_io_ops_prev, 0, sizeof(kgdb_io_ops_prev));
+
+       /* We can't do much if this fails */
+       register_module_notifier(&kgdb_module_load_nb);
+
+       kgdb_initialized = 1;
+}
+
+static void kgdb_register_for_panic(void)
+{
+       /* Register for panics(). */
+       /* The registration is done in the kgdb_register_for_panic
+        * routine because KGDB should not try to handle a panic when
+        * there are no kgdb_io_ops setup. It is assumed that the
+        * kgdb_io_ops are setup at the time this method is called.
+        */
+       if (!kgdb_from_module_registered) {
+               atomic_notifier_chain_register(&panic_notifier_list,
+                                       &kgdb_panic_notifier);
+               kgdb_from_module_registered = 1;
+       }
+}
+
+static void kgdb_unregister_for_panic(void)
+{
+       /* When this routine is called KGDB should unregister from the
+        * panic handler and clean up, making sure it is not handling any
+        * break exceptions at the time.
+        */
+       if (kgdb_from_module_registered) {
+               kgdb_from_module_registered = 0;
+               atomic_notifier_chain_unregister(&panic_notifier_list,
+                                         &kgdb_panic_notifier);
+       }
+}
+
+int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops)
+{
+
+       if (kgdb_connected) {
+               printk(KERN_ERR "kgdb: Cannot load I/O module while KGDB "
+                      "connected.\n");
+               return -EINVAL;
+       }
+
+       /* Save the old values so they can be restored */
+       if (kgdb_io_handler_cnt >= MAX_KGDB_IO_HANDLERS) {
+               printk(KERN_ERR "kgdb: No more I/O handles available.\n");
+               return -EINVAL;
+       }
+
+       /* Check to see if there is an existing driver and if so save its
+        * values.  Also check to make sure the same driver was not trying
+        * to re-register.
+        */
+       if (kgdb_io_ops.read_char != NULL &&
+        kgdb_io_ops.read_char != local_kgdb_io_ops->read_char) {
+               memcpy(&kgdb_io_ops_prev[kgdb_io_handler_cnt],
+                      &kgdb_io_ops, sizeof(struct kgdb_io));
+               kgdb_io_handler_cnt++;
+       }
+
+       /* Initialize the io values for this module */
+       memcpy(&kgdb_io_ops, local_kgdb_io_ops, sizeof(struct kgdb_io));
+
+       /* Make the call to register kgdb if is not initialized */
+       kgdb_register_for_panic();
+
+       return 0;
+}
+
+void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops)
+{
+       int i;
+
+       /* Unregister KGDB if there were no other prior io hooks, else
+        * restore the io hooks.
+        */
+       if (kgdb_io_handler_cnt > 0 && kgdb_io_ops_prev[0].read_char != NULL) {
+               /* First check if the hook that is in use is the one being
+                * removed */
+               if (kgdb_io_ops.read_char == local_kgdb_io_ops->read_char) {
+                       /* Set 'i' to the value of where the list should be
+                        * shifed */
+                       i = kgdb_io_handler_cnt - 1;
+                       memcpy(&kgdb_io_ops, &kgdb_io_ops_prev[i],
+                              sizeof(struct kgdb_io));
+               } else {
+                       /* Simple case to remove an entry for an I/O handler
+                        * that is not in use */
+                       for (i = 0; i < kgdb_io_handler_cnt; i++) {
+                               if (kgdb_io_ops_prev[i].read_char ==
+                                   local_kgdb_io_ops->read_char)
+                                       break;
+                       }
+               }
+
+               /* Shift all the entries in the handler array so it is
+                * ordered from oldest to newest.
+                */
+               kgdb_io_handler_cnt--;
+               for (; i < kgdb_io_handler_cnt; i++) {
+                       memcpy(&kgdb_io_ops_prev[i], &kgdb_io_ops_prev[i + 1],
+                              sizeof(struct kgdb_io));
+               }
+               /* Handle the case if we are on the last element and set it
+                * to NULL; */
+               memset(&kgdb_io_ops_prev[kgdb_io_handler_cnt], 0,
+                               sizeof(struct kgdb_io));
+
+               if (kgdb_connected)
+                       printk(KERN_ERR "kgdb: WARNING: I/O method changed "
+                              "while kgdb was connected state.\n");
+       } else {
+               /* KGDB is no longer able to communicate out, so
+                * unregister our hooks and reset state. */
+               kgdb_unregister_for_panic();
+               if (kgdb_connected) {
+                       printk(KERN_CRIT "kgdb: I/O module was unloaded while "
+                                       "a debugging session was running.  "
+                                       "KGDB will be reset.\n");
+                       if (remove_all_break() < 0)
+                               printk(KERN_CRIT "kgdb: Reset failed.\n");
+                       kgdb_connected = 0;
+               }
+               memset(&kgdb_io_ops, 0, sizeof(struct kgdb_io));
+       }
+}
+
+/*
+ * There are times we need to call a tasklet to cause a breakpoint
+ * as calling breakpoint() at that point might be fatal.  We have to
+ * check that the exception stack is setup, as tasklets may be scheduled
+ * prior to this.  When that happens, it is up to the architecture to
+ * schedule this when it is safe to run.
+ */
+static void kgdb_tasklet_bpt(unsigned long ing)
+{
+       if(CHECK_EXCEPTION_STACK())
+               breakpoint();
+}
+
+DECLARE_TASKLET(kgdb_tasklet_breakpoint, kgdb_tasklet_bpt, 0);
+
+/*
+ * This function can be called very early, either via early_param() or
+ * an explicit breakpoint() early on.
+ */
+static void __init kgdb_early_entry(void)
+{
+       /*
+        * Don't try and do anything until the architecture is able to
+        * setup the exception stack.  In this case, it is up to the
+        * architecture to hook in and look at us when they are ready.
+        */
+       if(!CHECK_EXCEPTION_STACK()) {
+               kgdb_initialized = -1;
+               tasklet_schedule(&kgdb_tasklet_breakpoint);
+               return;
+       }
+
+       /* Let the architecture do any setup that it needs to. */
+       kgdb_arch_init();
+
+       /* Now try the I/O. */
+       /* For early entry kgdb_io_ops.init must be defined */
+       if (!kgdb_io_ops.init || kgdb_io_ops.init()) {
+               /* Try again later. */
+               kgdb_initialized = -1;
+               return;
+       }
+
+       /* Finish up. */
+       kgdb_internal_init();
+
+       /* KGDB can assume that if kgdb_io_ops.init was defined that the
+        * panic registion should be performed at this time. This means
+        * kgdb_io_ops.init did not come from a kernel module and was
+        * initialized statically by a built in.
+        */
+       if (kgdb_io_ops.init)
+               kgdb_register_for_panic();
+}
+
+/*
+ * This function will always be invoked to make sure that KGDB will grab
+ * what it needs to so that if something happens while the system is
+ * running, KGDB will get involved.  If kgdb_early_entry() has already
+ * been invoked, there is little we need to do.
+ */
+static int __init kgdb_late_entry(void)
+{
+       int need_break = 0;
+
+       /* If kgdb_initialized is -1 then we were passed kgdbwait. */
+       if (kgdb_initialized == -1)
+               need_break = 1;
+
+       /*
+        * If we haven't tried to initialize KGDB yet, we need to call
+        * kgdb_arch_init before moving onto the I/O.
+        */
+       if (!kgdb_initialized)
+               kgdb_arch_init();
+
+       if (kgdb_initialized != 1) {
+               if (kgdb_io_ops.init && kgdb_io_ops.init()) {
+                       /* When KGDB allows I/O via modules and the core
+                        * I/O init fails KGDB must default to defering the
+                        * I/O setup, and appropriately print an error about
+                        * it.
+                        */
+                       printk(KERN_ERR "kgdb: Could not setup core I/O "
+                              "for KGDB.\n");
+                       printk(KERN_INFO "kgdb: Defering I/O setup to kernel "
+                              "module.\n");
+                       memset(&kgdb_io_ops, 0, sizeof(struct kgdb_io));
+               }
+
+               kgdb_internal_init();
+
+               /* KGDB can assume that if kgdb_io_ops.init was defined that
+                * panic registion should be performed at this time. This means
+                * kgdb_io_ops.init did not come from a kernel module and was
+                * initialized statically by a built in.
+                */
+               if (kgdb_io_ops.init)
+                       kgdb_register_for_panic();
+       }
+
+       /* Registering to reboot notifier list*/
+       register_reboot_notifier(&kgdb_reboot_notifier);
+
+       /* Now do any late init of the I/O. */
+       if (kgdb_io_ops.late_init)
+               kgdb_io_ops.late_init();
+
+       if (need_break) {
+               printk(KERN_CRIT "kgdb: Waiting for connection from remote"
+                      " gdb...\n");
+               breakpoint();
+       }
+
+       return 0;
+}
+
+late_initcall(kgdb_late_entry);
+
+/*
+ * This function will generate a breakpoint exception.  It is used at the
+ * beginning of a program to sync up with a debugger and can be used
+ * otherwise as a quick means to stop program execution and "break" into
+ * the debugger.
+ */
+void breakpoint(void)
+{
+       if (kgdb_initialized != 1) {
+               kgdb_early_entry();
+               if (kgdb_initialized == 1)
+                       printk(KERN_CRIT "Waiting for connection from remote "
+                              "gdb...\n");
+               else {
+                       printk(KERN_CRIT "KGDB cannot initialize I/O yet.\n");
+                       return;
+               }
+       }
+
+       atomic_set(&kgdb_setting_breakpoint, 1);
+       wmb();
+       BREAKPOINT();
+       wmb();
+       atomic_set(&kgdb_setting_breakpoint, 0);
+}
+
+EXPORT_SYMBOL(breakpoint);
+
+#ifdef CONFIG_MAGIC_SYSRQ
+static void sysrq_handle_gdb(int key, struct pt_regs *pt_regs,
+                            struct tty_struct *tty)
+{
+       printk("Entering GDB stub\n");
+       breakpoint();
+}
+static struct sysrq_key_op sysrq_gdb_op = {
+       .handler = sysrq_handle_gdb,
+       .help_msg = "Gdb",
+       .action_msg = "GDB",
+};
+
+static int gdb_register_sysrq(void)
+{
+       printk("Registering GDB sysrq handler\n");
+       register_sysrq_key('g', &sysrq_gdb_op);
+       return 0;
+}
+
+module_init(gdb_register_sysrq);
+#endif
+
+static int kgdb_notify_reboot(struct notifier_block *this,
+                            unsigned long code, void *x)
+{
+
+       unsigned long flags;
+
+       /* If we're debugging, or KGDB has not connected, don't try
+        * and print. */
+       if (!kgdb_connected || atomic_read(&debugger_active) != 0)
+               return 0;
+       if ((code == SYS_RESTART) || (code == SYS_HALT) || (code == SYS_POWER_OFF)){
+               local_irq_save(flags);
+               put_packet("X00");
+               local_irq_restore(flags);
+       }
+       return NOTIFY_DONE;
+}
+
+#ifdef CONFIG_KGDB_CONSOLE
+void kgdb_console_write(struct console *co, const char *s, unsigned count)
+{
+       unsigned long flags;
+
+       /* If we're debugging, or KGDB has not connected, don't try
+        * and print. */
+       if (!kgdb_connected || atomic_read(&debugger_active) != 0)
+               return;
+
+       local_irq_save(flags);
+       kgdb_msg_write(s, count);
+       local_irq_restore(flags);
+}
+
+struct console kgdbcons = {
+       .name = "kgdb",
+       .write = kgdb_console_write,
+       .flags = CON_PRINTBUFFER | CON_ENABLED,
+};
+static int __init kgdb_console_init(void)
+{
+       register_console(&kgdbcons);
+       return 0;
+}
+
+console_initcall(kgdb_console_init);
+#endif
+
+static int __init opt_kgdb_enter(char *str)
+{
+       /* We've already done this by an explicit breakpoint() call. */
+       if (kgdb_initialized)
+               return 0;
+
+       /* Call breakpoint() which will take care of init. */
+       breakpoint();
+
+       return 0;
+}
+
+early_param("kgdbwait", opt_kgdb_enter);
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/kernel/kgdbarchlib.c linux-2.6.18-53.1.14.kgdb/kernel/kgdbarchlib.c
--- linux-2.6.18-53.1.14/kernel/kgdbarchlib.c   1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/kernel/kgdbarchlib.c      2008-06-10 15:37:25.000000000 +0400
@@ -0,0 +1,198 @@
+#include <linux/kgdb.h>
+
+struct kgdb_arch *kgdb_ops = &arch_kgdb_ops;
+
+/**
+ *     kgdb_arch_init - Perform any architecture specific initalization.
+ *
+ *     RETURN:
+ *     The return value is ignored.
+ *
+ *     This function will handle the initalization of any architecture
+ *     specific hooks.
+ */
+int __attribute__ ((weak))
+    kgdb_arch_init(void)
+{
+       return 0;
+}
+
+/**
+ *     kgdb_disable_hw_debug - Disable hardware debugging while we in kgdb.
+ *     @regs: Current &struct pt_regs.
+ *
+ *     This function will be called if the particular architecture must
+ *     disable hardware debugging while it is processing gdb packets or
+ *     handling exception.
+ */
+void __attribute__ ((weak))
+    kgdb_disable_hw_debug(struct pt_regs *regs)
+{
+}
+
+/*
+ * Skip an int3 exception when it occurs after a breakpoint has been
+ * removed. Backtrack eip by 1 since the int3 would have caused it to
+ * increment by 1.
+ */
+int __attribute__ ((weak))
+       kgdb_skipexception(int exception, struct pt_regs *regs)
+{
+       return 0;
+}
+
+/**
+ *     kgdb_set_hw_break - Set a hardware breakpoint at @addr.
+ *     @addr: The address to set a hardware breakpoint at.
+ */
+int __attribute__ ((weak))
+    kgdb_set_hw_break(unsigned long addr)
+{
+       return 0;
+}
+
+/**
+ *     kgdb_remove_hw_break - Remove a hardware breakpoint at @addr.
+ *     @addr: The address to remove a hardware breakpoint from.
+ */
+int __attribute__ ((weak))
+    kgdb_remove_hw_break(unsigned long addr)
+{
+       return 0;
+}
+
+/**
+ *     kgdb_remove_all_hw_break - Clear all hardware breakpoints.
+ */
+void __attribute__ ((weak))
+    kgdb_remove_all_hw_break(void)
+{
+}
+
+/**
+ *     kgdb_correct_hw_break - Correct hardware breakpoints.
+ *
+ *     A hook to allow for changes to the hardware breakpoint, called
+ *     after a single step (s) or continue (c) packet, and once we're about
+ *     to let the kernel continue running.
+ *
+ *     This is used to set the hardware breakpoint registers for all the
+ *     slave cpus on an SMP configuration. This must be called after any
+ *     changes are made to the hardware breakpoints (such as by a single
+ *     step (s) or continue (c) packet. This is only required on
+ *     architectures that support SMP and every processor has its own set
+ *     of breakpoint registers.
+ */
+void __attribute__ ((weak))
+    kgdb_correct_hw_break(void)
+{
+}
+
+/**
+ *     kgdb_post_master_code - Save error vector/code numbers.
+ *     @regs: Original pt_regs.
+ *     @e_vector: Original error vector.
+ *     @err_code: Original error code.
+ *
+ *     This is needed on architectures which support SMP and KGDB.
+ *     This function is called after all the slave cpus have been put
+ *     to a know spin state and the master CPU has control over KGDB.
+ */
+
+void __attribute__ ((weak))
+    kgdb_post_master_code(struct pt_regs *regs, int e_vector, int err_code)
+{
+}
+
+/**
+ *     kgdb_roundup_cpus - Get other CPUs into a holding pattern
+ *     @flags: Current IRQ state
+ *
+ *     On SMP systems, we need to get the attention of the other CPUs
+ *     and get them be in a known state.  This should do what is needed
+ *     to get the other CPUs to call kgdb_wait(). Note that on some arches,
+ *     the NMI approach is not used for rounding up all the CPUs. For example,
+ *     in case of MIPS, smp_call_function() is used to roundup CPUs. In
+ *     this case, we have to make sure that interrupts are enabled before
+ *     calling smp_call_function(). The argument to this function is
+ *     the flags that will be used when restoring the interrupts. There is
+ *     local_irq_save() call before kgdb_roundup_cpus().
+ */
+void __attribute__ ((weak))
+    kgdb_roundup_cpus(unsigned long flags)
+{
+}
+
+/**
+ *     kgdb_shadowinfo - Get shadowed information on @threadid.
+ *     @regs: The &struct pt_regs of the current process.
+ *     @buffer: A buffer of %BUFMAX size.
+ *     @threadid: The thread id of the shadowed process to get information on.
+ */
+void __attribute__ ((weak))
+    kgdb_shadowinfo(struct pt_regs *regs, char *buffer, unsigned threadid)
+{
+}
+
+/**
+ *     kgdb_get_shadow_thread - Get the shadowed &task_struct of @threadid.
+ *     @regs: The &struct pt_regs of the current thread.
+ *     @threadid: The thread id of the shadowed process to get information on.
+ *
+ *     RETURN:
+ *     This returns a pointer to the &struct task_struct of the shadowed
+ *     thread, @threadid.
+ */
+struct task_struct __attribute__ ((weak))
+    * kgdb_get_shadow_thread(struct pt_regs *regs, int threadid)
+{
+       return NULL;
+}
+
+/**
+ *     kgdb_shadow_regs - Return the shadowed registers of @threadid.
+ *     @regs: The &struct pt_regs of the current thread.
+ *     @threadid: The thread id we want the &struct pt_regs for.
+ *
+ *     RETURN:
+ *     The a pointer to the &struct pt_regs of the shadowed thread @threadid.
+ */
+struct pt_regs __attribute__ ((weak))
+    * kgdb_shadow_regs(struct pt_regs *regs, int threadid)
+{
+       return NULL;
+}
+
+int __attribute__ ((weak))
+     kgdb_validate_break_address(unsigned long addr)
+{
+       int error = 0;
+       char tmp_variable[BREAK_INSTR_SIZE];
+       error = kgdb_get_mem((char *)addr, tmp_variable, BREAK_INSTR_SIZE);
+       return error;
+}
+
+int __attribute__ ((weak))
+     kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr)
+{
+       int error = 0;
+       if ((error = kgdb_get_mem((char *)addr,
+               saved_instr, BREAK_INSTR_SIZE)) < 0)
+                       return error;
+
+       if ((error = kgdb_set_mem((char *)addr, kgdb_ops->gdb_bpt_instr,
+               BREAK_INSTR_SIZE)) < 0)
+                       return error;
+       return 0;
+}
+
+int __attribute__ ((weak))
+     kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle)
+{
+
+       int error = 0;
+       if ((error =kgdb_set_mem((char *)addr, (char *)bundle,
+               BREAK_INSTR_SIZE)) < 0)
+                       return error;
+       return 0;
+}
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/kernel/module.c linux-2.6.18-53.1.14.kgdb/kernel/module.c
--- linux-2.6.18-53.1.14/kernel/module.c        2008-03-06 05:54:13.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/kernel/module.c   2008-06-10 15:39:15.000000000 +0400
@@ -65,6 +65,7 @@ static DEFINE_SPINLOCK(modlist_lock);
 /* List of modules, protected by module_mutex AND modlist_lock */
 static DEFINE_MUTEX(module_mutex);
 static LIST_HEAD(modules);
+static DECLARE_MUTEX(notify_mutex);
 
 static BLOCKING_NOTIFIER_HEAD(module_notify_list);
 
@@ -701,6 +702,12 @@ sys_delete_module(const char __user *nam
        if (ret != 0)
                goto out;
 
+       down(&notify_mutex);
+       blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING,
+                               mod);
+       up(&notify_mutex);
+
+
        /* Never wait if forced. */
        if (!forced && module_refcount(mod) != 0)
                wait_for_zero_refcount(mod);
@@ -713,6 +720,11 @@ sys_delete_module(const char __user *nam
        }
        free_module(mod);
 
+       down(&notify_mutex);
+       blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GONE,
+                       NULL);
+       up(&notify_mutex);
+
  out:
        mutex_unlock(&module_mutex);
        return ret;
@@ -1119,6 +1131,11 @@ static void free_module(struct module *m
        /* Arch-specific cleanup. */
        module_arch_cleanup(mod);
 
+#ifdef CONFIG_KGDB
+       /* kgdb info */
+       vfree(mod->mod_sections);
+#endif
+
        /* Module unload stuff */
        module_unload_free(mod);
 
@@ -1378,6 +1395,31 @@ static void setup_modinfo(struct module 
        }
 }
 
+#ifdef CONFIG_KGDB
+int add_modsects (struct module *mod, Elf_Ehdr *hdr, Elf_Shdr *sechdrs, const
+                char *secstrings)
+{
+        int i;
+
+        mod->num_sections = hdr->e_shnum - 1;
+        mod->mod_sections = vmalloc((hdr->e_shnum - 1)*
+               sizeof (struct mod_section));
+
+        if (mod->mod_sections == NULL) {
+                return -ENOMEM;
+        }
+
+        for (i = 1; i < hdr->e_shnum; i++) {
+                mod->mod_sections[i - 1].address = (void *)sechdrs[i].sh_addr;
+                strncpy(mod->mod_sections[i - 1].name, secstrings +
+                                sechdrs[i].sh_name, MAX_SECTNAME);
+                mod->mod_sections[i - 1].name[MAX_SECTNAME] = '\0';
+       }
+
+       return 0;
+}
+#endif
+
 #ifdef CONFIG_KALLSYMS
 int is_exported(const char *name, const struct module *mod)
 {
@@ -1796,6 +1838,12 @@ static struct module *load_module(void _
 
        add_kallsyms(mod, sechdrs, symindex, strindex, secstrings);
 
+#ifdef CONFIG_KGDB
+        if ((err = add_modsects(mod, hdr, sechdrs, secstrings)) < 0) {
+                goto nomodsectinfo;
+        }
+#endif
+
        err = module_finalize(hdr, sechdrs, mod);
        if (err < 0)
                goto cleanup;
@@ -1856,6 +1904,11 @@ static struct module *load_module(void _
  arch_cleanup:
        module_arch_cleanup(mod);
  cleanup:
+
+#ifdef CONFIG_KGDB
+nomodsectinfo:
+       vfree(mod->mod_sections);
+#endif
        module_unload_free(mod);
        module_free(mod, mod->module_init);
  free_core:
@@ -1927,6 +1980,10 @@ sys_init_module(void __user *umod,
                /* Init routine failed: abort.  Try to protect us from
                    buggy refcounters. */
                mod->state = MODULE_STATE_GOING;
+               down(&notify_mutex);
+               blocking_notifier_call_chain(&module_notify_list, MODULE_STATE_GOING,
+                               mod);
+               up(&notify_mutex);
                synchronize_sched();
                if (mod->unsafe)
                        printk(KERN_ERR "%s: module is now stuck!\n",
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/kernel/sched.c linux-2.6.18-53.1.14.kgdb/kernel/sched.c
--- linux-2.6.18-53.1.14/kernel/sched.c 2008-03-06 05:54:44.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/kernel/sched.c    2008-06-10 15:37:25.000000000 +0400
@@ -52,6 +52,7 @@
 #include <linux/acct.h>
 #include <linux/kprobes.h>
 #include <linux/delayacct.h>
+#include <linux/kgdb.h>
 #include <asm/tlb.h>
 
 #include <asm/unistd.h>
@@ -6835,6 +6836,9 @@ void __might_sleep(char *file, int line)
 #ifdef in_atomic
        static unsigned long prev_jiffy;        /* ratelimiting */
 
+       if (atomic_read(&debugger_active))
+               return;
+
        if ((in_atomic() || irqs_disabled()) &&
            system_state == SYSTEM_RUNNING && !oops_in_progress) {
                if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy)
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/kernel/softlockup.c linux-2.6.18-53.1.14.kgdb/kernel/softlockup.c
--- linux-2.6.18-53.1.14/kernel/softlockup.c    2008-03-06 05:54:44.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/kernel/softlockup.c       2008-06-10 15:39:21.000000000 +0400
@@ -13,6 +13,7 @@
 #include <linux/kthread.h>
 #include <linux/notifier.h>
 #include <linux/module.h>
+#include <linux/kgdb.h>
 
 static DEFINE_SPINLOCK(print_lock);
 
@@ -37,6 +38,9 @@ static struct notifier_block panic_block
 void touch_softlockup_watchdog(void)
 {
        __raw_get_cpu_var(touch_timestamp) = jiffies;
+#ifdef CONFIG_KGDB
+       atomic_set(&kgdb_sync_softlockup[raw_smp_processor_id()], 0);
+#endif
 }
 EXPORT_SYMBOL(touch_softlockup_watchdog);
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/kernel/timer.c linux-2.6.18-53.1.14.kgdb/kernel/timer.c
--- linux-2.6.18-53.1.14/kernel/timer.c 2008-03-06 05:54:50.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/kernel/timer.c    2008-06-10 15:39:21.000000000 +0400
@@ -34,6 +34,7 @@
 #include <linux/cpu.h>
 #include <linux/syscalls.h>
 #include <linux/delay.h>
+#include <linux/kgdb.h>
 
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
@@ -1385,7 +1386,11 @@ static void run_timer_softirq(struct sof
  */
 void run_local_timers(void)
 {
+       int this_cpu = smp_processor_id();
        raise_softirq(TIMER_SOFTIRQ);
+#ifdef CONFIG_KGDB
+       if(!atomic_read(&kgdb_sync_softlockup[this_cpu]))
+#endif
        softlockup_tick();
 }
 
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/lib/Kconfig.debug linux-2.6.18-53.1.14.kgdb/lib/Kconfig.debug
--- linux-2.6.18-53.1.14/lib/Kconfig.debug      2008-03-06 05:54:32.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/lib/Kconfig.debug 2008-06-10 15:38:56.000000000 +0400
@@ -324,7 +324,7 @@ config DEBUG_LIST
 
 config FRAME_POINTER
        bool "Compile the kernel with frame pointers"
-       depends on DEBUG_KERNEL && (X86 || CRIS || M68K || M68KNOMMU || FRV || UML || S390)
+       depends on DEBUG_KERNEL && (X86 || CRIS || M68K || M68KNOMMU || FRV || UML || S390 || SUPERH)
        default y if DEBUG_INFO && UML
        help
          If you say Y here the resulting kernel image will be slightly larger
@@ -377,3 +377,158 @@ config RCU_TORTURE_TEST
          at boot time (you probably don't).
          Say M if you want the RCU torture tests to build as a module.
          Say N if you are unsure.
+
+config WANT_EXTRA_DEBUG_INFORMATION
+       bool
+       select DEBUG_INFO
+       select FRAME_POINTER if X86 || SUPERH
+       default n
+
+config KGDB
+       bool "KGDB: kernel debugging with remote gdb"
+       select WANT_EXTRA_DEBUG_INFORMATION
+       depends on DEBUG_KERNEL && (ARM || X86 || MIPS || (SUPERH && !SUPERH64) || IA64 || X86_64 || PPC)
+       help
+         If you say Y here, it will be possible to remotely debug the
+         kernel using gdb. It is strongly suggested that you enable
+         DEBUG_INFO, and if available on your platform, FRAME_POINTER.
+         Documentation of kernel debugger available at
+         http://kgdb.sourceforge.net as well as in DocBook form
+         in Documentation/DocBook/.  If unsure, say N.
+
+config KGDB_CONSOLE
+       bool "KGDB: Console messages through gdb"
+       depends on KGDB
+         help
+           If you say Y here, console messages will appear through gdb.
+           Other consoles such as tty or ttyS will continue to work as usual.
+           Note, that if you use this in conjunction with KGDB_ETH, if the
+           ethernet driver runs into an error condition during use with KGDB
+           it is possible to hit an infinite recusrion, causing the kernel
+           to crash, and typically reboot.  For this reason, it is preferable
+           to use NETCONSOLE in conjunction with KGDB_ETH instead of
+           KGDB_CONSOLE.
+
+choice
+       prompt "Method for KGDB communication"
+       depends on KGDB
+       default KGDB_8250_NOMODULE
+       default KGDB_MPSC if SERIAL_MPSC
+       default KGDB_CPM_UART if (8xx || 8260)
+       default KGDB_SIBYTE if SIBYTE_SB1xxx_SOC
+       help
+         There are a number of different ways in which you can communicate
+         with KGDB.  The most common is via serial, with the 8250 driver
+         (should your hardware have an 8250, or ns1655x style uart).
+         Another option is to use the NETPOLL framework and UDP, should
+         your ethernet card support this.  Other options may exist.
+         You can elect to have one core I/O driver that is built into the
+         kernel for debugging as the kernel is booting, or using only
+         kernel modules.
+
+config KGDB_ONLY_MODULES
+       bool "KGDB: Use only kernel modules for I/O"
+       depends on MODULES
+       help
+         Use only kernel modules to configure KGDB I/O after the
+         kernel is booted.
+
+config KGDB_8250_NOMODULE
+       bool "KGDB: On generic serial port (8250)"
+       select KGDB_8250
+       help
+         Uses generic serial port (8250) to communicate with the host
+         GDB.  This is independent of the normal (SERIAL_8250) driver
+         for this chipset.
+
+config KGDBOE_NOMODULE
+       bool "KGDB: On ethernet - in kernel"
+       select KGDBOE
+       select NETPOLL
+       select NETPOLL_TRAP
+       select NETPOLL_RX
+       help
+         Uses the NETPOLL API to communicate with the host GDB via UDP.
+         In order for this to work, the ethernet interface specified must
+         support the NETPOLL API, and this must be initialized at boot.
+         See the documentation for syntax.
+
+config KGDB_MPSC
+       bool "KGDB on MV64x60 MPSC"
+       depends on SERIAL_MPSC
+       help
+         Uses a Marvell GT64260B or MV64x60 Multi-Purpose Serial
+         Controller (MPSC) channel. Note that the GT64260A is not
+         supported.
+
+config KGDB_CPM_UART
+       bool "KGDB: On CPM UART"
+       depends on PPC && (CPM2 || 8xx)
+       help
+         Uses CPM UART to communicate with the host GDB.
+
+config KGDB_SIBYTE
+       bool "KGDB: On the Broadcom SWARM serial port"
+       depends on MIPS && SIBYTE_SB1xxx_SOC
+endchoice
+
+config KGDBOE
+       tristate "KGDB: On ethernet" if !KGDBOE_NOMODULE
+       depends on m && KGDB
+       select NETPOLL
+       select NETPOLL_TRAP
+       select NETPOLL_RX
+       help
+         Uses the NETPOLL API to communicate with the host GDB via UDP.
+         In order for this to work, the ethernet interface specified must
+         support the NETPOLL API, and this must be initialized at boot.
+         See the documentation for syntax.
+
+config KGDB_8250
+       tristate "KGDB: On generic serial port (8250)" if !KGDB_8250_NOMODULE
+       depends on m && KGDB_ONLY_MODULES
+       help
+         Uses generic serial port (8250) to communicate with the host
+         GDB.  This is independent of the normal (SERIAL_8250) driver
+         for this chipset.
+
+config KGDB_SIMPLE_SERIAL
+       bool "Simple selection of KGDB serial port"
+       depends on KGDB_8250_NOMODULE
+       default y
+       help
+         If you say Y here, you will only have to pick the baud rate
+         and port number that you wish to use for KGDB.  Note that this
+         only works on architectures that register known serial ports
+         early on.  If you say N, you will have to provide, either here
+         or on the command line, the type (I/O or MMIO), IRQ and
+         address to use.  If in doubt, say Y.
+
+config KGDB_BAUDRATE
+       int "Debug serial port baud rate"
+       depends on (KGDB_8250 && KGDB_SIMPLE_SERIAL)
+       default "115200"
+       help
+         gdb and the kernel stub need to agree on the baud rate to be
+         used.  Standard rates from 9600 to 115200 are allowed, and this
+         may be overridden via the commandline.
+
+config KGDB_PORT_NUM
+       int "Serial port number for KGDB"
+       range 0 1 if KGDB_MPSC
+       range 0 3
+       depends on (KGDB_8250 && KGDB_SIMPLE_SERIAL) || KGDB_MPSC
+       default "1"
+       help
+         Pick the port number (0 based) for KGDB to use.
+
+config KGDB_8250_CONF_STRING
+       string "Configuration string for KGDB"
+       depends on KGDB_8250_NOMODULE && !KGDB_SIMPLE_SERIAL
+       default "io,2f8,115200,3" if X86
+       help
+         The format of this string should be <io or
+         mmio>,<address>,<baud rate>,<irq>.  For example, to use the
+         serial port on an i386 box located at 0x2f8 and 115200 baud
+         on IRQ 3 at use:
+         io,2f8,115200,3
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/net/core/netpoll.c linux-2.6.18-53.1.14.kgdb/net/core/netpoll.c
--- linux-2.6.18-53.1.14/net/core/netpoll.c     2008-03-06 05:54:27.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/net/core/netpoll.c        2008-06-10 15:37:49.000000000 +0400
@@ -525,7 +525,8 @@ int __netpoll_rx(struct sk_buff *skb)
 
        np->rx_hook(np, ntohs(uh->source),
                    (char *)(uh+1),
-                   ulen - sizeof(struct udphdr));
+                   ulen - sizeof(struct udphdr),
+                   skb);
 
        kfree_skb(skb);
        return 1;
diff -rupbBN -X ../client-cleanup/dontdiff linux-2.6.18-53.1.14/scripts/dwarfh.awk linux-2.6.18-53.1.14.kgdb/scripts/dwarfh.awk
--- linux-2.6.18-53.1.14/scripts/dwarfh.awk     1970-01-01 03:00:00.000000000 +0300
+++ linux-2.6.18-53.1.14.kgdb/scripts/dwarfh.awk        2008-06-10 15:39:01.000000000 +0400
@@ -0,0 +1,19 @@
+BEGIN {
+       print "#ifndef  _ELF_DWARF_H"
+               print "/* Machine generated from dwarf2.h by scripts/dwarfh.awk */"
+}
+$2 == "=" {
+       gsub(/,/, "", $3)
+       print "#define " $1 "\t " $3
+}
+$1 == "#define" {
+       print $0
+       while( index($0,"\\") == length($0)){
+               getline
+               print $0
+       }
+}
+/.*/ {}
+END {
+       print "#endif"
+}