kgdb cleanups
From: Pavel Machek (pavel_at_ucw.cz)
Date: 01/09/04
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Date: Fri, 9 Jan 2004 19:38:26 +0100 To: kernel list <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@zip.com.au>
Hi!
No real code changes, but cleanups all over the place. What about
applying?
Ouch and arch-dependend code is moved to kernel/kgdb.c. I'll probably
do x86-64 version so that is rather important.
Pavel
--- tmp/linux/Documentation/i386/kgdb/kgdb.txt 2004-01-09 19:04:43.000000000 +0100
+++ linux/Documentation/i386/kgdb/kgdb.txt 2003-12-25 15:11:19.000000000 +0100
@@ -1,242 +1,9 @@
-Last edit: <20030806.1637.12>
-This file has information specific to the i386 kgdb option. Other
-platforms with the kgdb option may behave in a similar fashion.
-
-New features:
-============
-20030806.1557.37
-This version was made against the 2.6.0-test2 kernel. We have made the
-following changes:
-
-- The getthread() code in the stub calls find_task_by_pid(). It fails
- if we are early in the bring up such that the pid arrays have yet to
- be allocated. We have added a line to kernel/pid.c to make
- "kgdb_pid_init_done" true once the arrays are allocated. This way the
- getthread() code knows not to call. This is only used by the thread
- debugging stuff and threads will not yet exist at this point in the
- boot.
-
-- For some reason, gdb was not asking for a new thread list when the
- "info thread" command was given. We changed to the newer version of
- the thread info command and gdb now seems to ask when needed. Result,
- we now get all threads in the thread list.
-
-- We now respond to the ThreadExtraInfo request from gdb with the thread
- name from task_struct .comm. This then appears in the thread list.
- Thoughts on additional options for this are welcome. Things such as
- "has BKL" and "Preempted" come to mind. I think we could have a flag
- word that could enable different bits of info here.
-
-- We now honor, sort of, the C and S commands. These are continue and
- single set after delivering a signal. We ignore the signal and do the
- requested action. This only happens when we told gdb that a signal
- was the reason for entry, which is only done on memory faults. The
- result is that you can now continue into the Oops.
-
-- We changed the -g to -gdwarf-2. This seems to be the same as -ggdb,
- but it is more exact on what language to use.
-
-- We added two dwarf2 include files and a bit of code at the end of
- entry.S. This does not yet work, so it is disabled. Still we want to
- keep track of the code and "maybe" someone out there can fix it.
-
-- Randy Dunlap sent some fix ups for this file which are now merged.
-
-- Hugh Dickins sent a fix to a bit of code in traps.c that prevents a
- compiler warning if CONFIG_KGDB is off (now who would do that :).
-
-- Andrew Morton sent a fix for the serial driver which is now merged.
-
-- Andrew also sent a change to the stub around the cpu managment code
- which is also merged.
-
-- Andrew also sent a patch to make "f" as well as "g" work as SysRq
- commands to enter kgdb, merged.
-
-- If CONFIG_KGDB and CONFIG_DEBUG_SPINLOCKS are both set we added a
- "who" field to the spinlock data struct. This is filled with
- "current" when ever the spinlock suceeds. Useful if you want to know
- who has the lock.
-
-_ And last, but not least, we fixed the "get_cu" macro to properly get
- the current value of "current".
-
-New features:
-============
-20030505.1827.27
-We are starting to align with the sourceforge version, at least in
-commands. To this end, the boot command string to start kgdb at
-boot time has been changed from "kgdb" to "gdb".
-
-Andrew Morton sent a couple of patches which are now included as follows:
-1.) We now return a flag to the interrupt handler.
-2.) We no longer use smp_num_cpus (a conflict with the lock meter).
-3.) And from William Lee Irwin III <wli@holomorphy.com> code to make
- sure high-mem is set up before we attempt to register our interrupt
- handler.
-We now include asm/kgdb.h from config.h so you will most likely never
-have to include it. It also 'NULLS' the kgdb macros you might have in
-your code when CONFIG_KGDB is not defined. This allows you to just
-turn off CONFIG_KGDB to turn off all the kgdb_ts() calls and such.
-This include is conditioned on the machine being an x86 so as to not
-mess with other archs.
-
-20020801.1129.03
-This is currently the version for the 2.4.18 (and beyond?) kernel.
-
-We have several new "features" beginning with this version:
-
-1.) Kgdb now syncs the "other" CPUs with a cross-CPU NMI. No more
- waiting and it will pull that guy out of an IRQ off spin lock :)
-
-2.) We doctored up the code that tells where a task is waiting and
- included it so that the "info thread" command will show a bit more
- than "schedule()". Try it...
-
-3.) Added the ability to call a function from gdb. All the standard gdb
- issues apply, i.e. if you hit a breakpoint in the function, you are
- not allowed to call another (gdb limitation, not kgdb). To help
- this capability we added a memory allocation function. Gdb does not
- return this memory (it is used for strings that you pass to that function
- you are calling from gdb) so we fixed up a way to allow you to
- manually return the memory (see below).
-
-4.) Kgdb time stamps (kgdb_ts()) are enhanced to expand what was the
- interrupt flag to now also include the preemption count and the
- "in_interrupt" info. The flag is now called "with_pif" to indicate
- the order, preempt_count, in_interrupt, flag. The preempt_count is
- shifted left by 4 bits so you can read the count in hex by dropping
- the low order digit. In_interrupt is in bit 1, and the flag is in
- bit 0.
-
-5.) The command: "p kgdb_info" is now expanded and prints something
- like:
-(gdb) p kgdb_info
-$2 = {used_malloc = 0, called_from = 0xc0107506, entry_tsc = 67468627259,
- errcode = 0, vector = 3, print_debug_info = 0, hold_on_sstep = 1,
- cpus_waiting = {{task = 0xc027a000, pid = 32768, hold = 0,
- regs = 0xc027bf84}, {task = 0x0, pid = 0, hold = 0, regs = 0x0}}}
-
- Things to note here: a.) used_malloc is the amount of memory that
- has been malloc'ed to do calls from gdb. You can reclaim this
- memory like this: "p kgdb_info.used_malloc=0" Cool, huh? b.)
- cpus_waiting is now "sized" by the number of CPUs you enter at
- configure time in the kgdb configure section. This is NOT used
- anywhere else in the system, but it is "nice" here. c.) The task's
- "pid" is now in the structure. This is the pid you will need to use
- to decode to the thread id to get gdb to look at that thread.
- Remember that the "info thread" command prints a list of threads
- wherein it numbers each thread with its reference number followed
- by the thread's pid. Note that the per-CPU idle threads actually
- have pids of 0 (yes, there is more than one pid 0 in an SMP system).
- To avoid confusion, kgdb numbers these threads with numbers beyond
- the MAX_PID. That is why you see 32768 and above.
-
-6.) A subtle change, we now provide the complete register set for tasks
- that are active on the other CPUs. This allows better trace back on
- those tasks.
-
- And, let's mention what we could not fix. Back-trace from all but the
- thread that we trapped will, most likely, have a bogus entry in it.
- The problem is that gdb does not recognize the entry code for
- functions that use "current" near (at all?) the entry. The compiler
- is putting the "current" decode as the first two instructions of the
- function where gdb expects to find %ebp changing code. Back trace
- also has trouble with interrupt frames. I am talking with Daniel
- Jacobowitz about some way to fix this, but don't hold your breath.
-
-20011220.0050.35
-Major enhancement with this version is the ability to hold one or more
-CPUs in an SMP system while allowing the others to continue. Also, by
-default only the current CPU is enabled on single-step commands (please
-note that gdb issues single-step commands at times other than when you
-use the si command).
-
-Another change is to collect some useful information in
-a global structure called "kgdb_info". You should be able to just:
-
-p kgdb_info
-
-although I have seen cases where the first time this is done gdb just
-prints the first member but prints the whole structure if you then enter
-CR (carriage return or enter). This also works:
-
-p *&kgdb_info
-
-Here is a sample:
-(gdb) p kgdb_info
-$4 = {called_from = 0xc010732c, entry_tsc = 32804123790856, errcode = 0,
- vector = 3, print_debug_info = 0}
-
-"Called_from" is the return address from the current entry into kgdb.
-Sometimes it is useful to know why you are in kgdb, for example, was
-it an NMI or a real breakpoint? The simple way to interrogate this
-return address is:
-
-l *0xc010732c
-
-which will print the surrounding few lines of source code.
-
-"Entry_tsc" is the CPU TSC on entry to kgdb (useful to compare to the
-kgdb_ts entries).
-
-"errcode" and "vector" are other entry parameters which may be helpful on
-some traps.
-
-"print_debug_info" is the internal debugging kgdb print enable flag. Yes,
-you can modify it.
-
-In SMP systems kgdb_info also includes the "cpus_waiting" structure and
-"hold_on_step":
-
-(gdb) p kgdb_info
-$7 = {called_from = 0xc0112739, entry_tsc = 1034936624074, errcode = 0,
- vector = 2, print_debug_info = 0, hold_on_sstep = 1, cpus_waiting = {{
- task = 0x0, hold = 0, regs = 0x0}, {task = 0xc71b8000, hold = 0,
- regs = 0xc71b9f70}, {task = 0x0, hold = 0, regs = 0x0}, {task = 0x0,
- hold = 0, regs = 0x0}, {task = 0x0, hold = 0, regs = 0x0}, {task = 0x0,
- hold = 0, regs = 0x0}, {task = 0x0, hold = 0, regs = 0x0}, {task = 0x0,
- hold = 0, regs = 0x0}}}
-
-"Cpus_waiting" has an entry for each CPU other than the current one that
-has been stopped. Each entry contains the task_struct address for that
-CPU, the address of the regs for that task and a hold flag. All these
-have the proper typing so that, for example:
-
-p *kgdb_info.cpus_waiting[1].regs
-
-will print the registers for CPU 1.
-
-"Hold_on_sstep" is a new feature with this version and comes up set or
-true. What this means is that whenever kgdb is asked to single-step all
-other CPUs are held (i.e. not allowed to execute). The flag applies to
-all but the current CPU and, again, can be changed:
-
-p kgdb_info.hold_on_sstep=0
-
-restores the old behavior of letting all CPUs run during single-stepping.
-
-Likewise, each CPU has a "hold" flag, which if set, locks that CPU out
-of execution. Note that this has some risk in cases where the CPUs need
-to communicate with each other. If kgdb finds no CPU available on exit,
-it will push a message thru gdb and stay in kgdb. Note that it is legal
-to hold the current CPU as long as at least one CPU can execute.
-
-20010621.1117.09
-This version implements an event queue. Events are signaled by calling
-a function in the kgdb stub and may be examined from gdb. See EVENTS
-below for details. This version also tightens up the interrupt and SMP
-handling to not allow interrupts on the way to kgdb from a breakpoint
-trap. It is fine to allow these interrupts for user code, but not
-system debugging.
-
Version
=======
-This version of the kgdb package was developed and tested on
-kernel version 2.4.16. It will not install on any earlier kernels.
-It is possible that it will continue to work on later versions
-of 2.4 and then versions of 2.5 (I hope).
+This version of the kgdb package was developed and tested on kernel
+version 2.6.0. It is possible that it will continue to work on later
+versions of 2.6.
Debugging Setup
@@ -314,7 +81,7 @@
set up after any serial drivers, it is possible that this command will
work when the control-C will not.
-Save and exit the Xconfig program. Then do "make clean" , "make dep"
+Save and exit the Xconfig program. Then do "make clean"
and "make bzImage" (or whatever target you want to make). This gets the
kernel compiled with the "-g" option set -- necessary for debugging.
diff -ur -x '.dep*' -x '.hdep*' -x '*.[oas]' -x '*~' -x '#*' -x '*CVS*' -x '*.orig' -x '*.rej' -x '*.old' -x '.menu*' -x asm -x local.h -x System.map -x autoconf.h -x compile.h -x version.h -x .version -x defkeymap.c -x uni_hash.tbl -x zImage -x vmlinux -x vmlinuz -x TAGS -x bootsect -x '*RCS*' -x conmakehash -x map -x build -x build -x configure -x '*target*' -x '*.flags' -x '*.bak' -x '*.cmd' tmp/linux/Documentation/i386/kgdb/kgdbeth.txt linux/Documentation/i386/kgdb/kgdbeth.txt
--- tmp/linux/Documentation/i386/kgdb/kgdbeth.txt 2004-01-09 19:04:43.000000000 +0100
+++ linux/Documentation/i386/kgdb/kgdbeth.txt 2003-12-25 14:55:58.000000000 +0100
@@ -33,8 +33,8 @@
gdbeth=DEVICENUM
gdbeth_remoteip=HOSTIPADDR
- gdbeth_remotemac=REMOTEMAC
- gdbeth_localmac=LOCALMAC
+ gdbeth_remotemac=HOSTMAC
+ gdbeth_localmac=TARGETMAC
kgdbeth=DEVICENUM sets the ethernet device number to listen on for
debugging packets. e.g. kgdbeth=0 listens on eth0.
@@ -43,10 +43,10 @@
Only packets originating from this IP address will be accepted by the
debugger. e.g. kgdbeth_remoteip=192.168.2.2
-kgdbeth_remotemac=REMOTEMAC sets the ethernet address of the HOST machine.
+kgdbeth_remotemac=HOSTMAC sets the ethernet address of the HOST machine.
e.g. kgdbeth_remotemac=00:07:70:12:4E:F5
-kgdbeth_localmac=LOCALMAC sets the ethernet address of the TARGET machine.
+kgdbeth_localmac=TARGETMAC sets the ethernet address of the TARGET machine.
e.g. kgdbeth_localmac=00:10:9F:18:21:3C
You can also set the following command-line option on the TARGET kernel:
--- tmp/linux/arch/i386/kernel/entry.S 2004-01-09 19:04:43.000000000 +0100
+++ linux/arch/i386/kernel/entry.S 2003-12-27 17:08:29.000000000 +0100
@@ -71,51 +71,6 @@
# location or end up with a return address pointing at the
# location, we don't need a correct call frame for it.
-#if 0
-
-#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
-
- CFI_preamble(c1,_PC,1,1)
- CFA_define_reference(_ESP,OLDESP)
- CFA_define_offset(_EIP,EIP)
- CFA_define_offset(_EBX,EBX)
- CFA_define_offset(_ECX,ECX)
- CFA_define_offset(_EDX,EDX)
- CFA_define_offset(_ESI,ESI)
- CFA_define_offset(_EDI,EDI)
- CFA_define_offset(_EBP,EBP)
- CFA_define_offset(_EAX,EAX)
- CFA_define_offset(_EFLAGS,EFLAGS)
- CFA_define_offset(_CS,CS)
- CFA_define_offset(_DS,DS)
- CFA_define_offset(_ES,ES)
- CFI_postamble(c1)
-
- FDE_preamble(c1,f1,ret_from_intr,(divide_error - ret_from_intr))
- FDE_postamble(f1)
-#endif
-
EBX = 0x00
ECX = 0x04
EDX = 0x08
@@ -366,19 +321,6 @@
testw $_TIF_ALLWORK_MASK, %cx # current->work
jne syscall_exit_work
restore_all:
-#ifdef CONFIG_TRAP_BAD_SYSCALL_EXITS
- movl EFLAGS(%esp), %eax # mix EFLAGS and CS
- movb CS(%esp), %al
- testl $(VM_MASK | 3), %eax
- jz resume_kernelX # returning to kernel or vm86-space
-
- cmpl $0,TI_PRE_COUNT(%ebx) # non-zero preempt_count ?
- jz resume_kernelX
-
- int $3
-
-resume_kernelX:
-#endif
RESTORE_ALL
# perform work that needs to be done immediately before resumption
--- tmp/linux/arch/i386/kernel/kgdb_stub.c 2004-01-09 19:04:43.000000000 +0100
+++ linux/arch/i386/kernel/kgdb_stub.c 2003-12-28 21:40:20.000000000 +0100
@@ -1,4 +1,8 @@
/*
+ * Kernel gdb stub, arch-dependend part
+ *
+ * Copyright (c) 2000 VERITAS Software Corporation.
+ * Copyright (c) 2003 Pavel Machek <pavel@suse.cz>
*
* 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
@@ -12,98 +16,7 @@
*
*/
-/*
- * Copyright (c) 2000 VERITAS Software Corporation.
- *
- */
-/****************************************************************************
- * 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 $
- * Updated by: David Grothe <dave@gcom.com>
- * Updated by: Robert Walsh <rjwalsh@durables.org>
- * Updated by: wangdi <wangdi@clusterfs.com>
- * ModuleState: Experimental $
- *
- * NOTES: See Below $
- *
- * Modified for 386 by Jim Kingdon, Cygnus Support.
- * Compatibility with 2.1.xx kernel by David Grothe <dave@gcom.com>
- *
- * Changes to allow auto initilization. All that is needed is that it
- * be linked with the kernel and a break point (int 3) be executed.
- * The header file <asm/kgdb.h> defines BREAKPOINT to allow one to do
- * this. It should also be possible, once the interrupt system is up, to
- * call putDebugChar("+"). Once this is done, the remote debugger should
- * get our attention by sending a ^C in a packet. George Anzinger
- * <george@mvista.com>
- * Integrated into 2.2.5 kernel by Tigran Aivazian <tigran@sco.com>
- * Added thread support, support for multiple processors,
- * support for ia-32(x86) hardware debugging.
- * Amit S. Kale ( akale@veritas.com )
- *
- * Modified to support debugging over ethernet by Robert Walsh
- * <rjwalsh@durables.org> and wangdi <wangdi@clusterfs.com>, based on
- * code by San Mehat.
- *
- *
- * 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 an int 3.
- *
- *************
- *
- * 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)
- *
- * 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
- *
- ****************************************************************************/
-#define KGDB_VERSION "<20030915.1651.33>"
+#define KGDB_VERSION "2.6.0"
#include <linux/config.h>
#include <linux/types.h>
#include <asm/string.h> /* for strcpy */
@@ -121,41 +34,11 @@
#include <linux/inet.h>
#include <linux/kallsyms.h>
-/************************************************************************
- *
- * external low-level support routines
- */
-typedef void (*Function) (void); /* pointer to a function */
-
-/* Thread reference */
-typedef unsigned char threadref[8];
-
-extern int tty_putDebugChar(int); /* write a single character */
-extern int tty_getDebugChar(void); /* read and return a single char */
-extern void tty_flushDebugChar(void); /* flush pending characters */
-extern int eth_putDebugChar(int); /* write a single character */
-extern int eth_getDebugChar(void); /* read and return a single char */
-extern void eth_flushDebugChar(void); /* flush pending characters */
-extern void kgdb_eth_set_trapmode(int);
-extern void kgdb_eth_reply_arp(void); /*send arp request */
-extern volatile int kgdb_eth_is_initializing;
-
-
-/************************************************************************/
-/* 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 400
-
-char *kgdb_version = KGDB_VERSION;
-
-/* debug > 0 prints ill-formed commands in valid packets & checksum errors */
-int debug_regs = 0; /* set to non-zero to print registers */
-
-/* filled in by an external module */
-char *gdb_module_offsets;
+#if __GNUC__ < 3
+#error Sorry, your GCC is too old to work with kgdb. (It works with 3.3.2)
+#endif
-static const char hexchars[] = "0123456789abcdef";
+#include "../../../kernel/kgdb.c"
/* Number of bytes of registers. */
#define NUMREGBYTES 64
@@ -184,135 +67,11 @@
_GS /* 15 */
};
-/*************************** ASSEMBLY CODE MACROS *************************/
-/*
- * Put the error code here just in case the user cares.
- * Likewise, the vector number here (since GDB only gets the signal
- * number through the usual means, and that's not very specific).
- * The called_from is the return address so he can tell how we entered kgdb.
- * This will allow him to seperate out the various possible entries.
- */
-#define REMOTE_DEBUG 0 /* set != to turn on printing (also available in info) */
-
-#define PID_MAX PID_MAX_DEFAULT
-
-#ifdef CONFIG_SMP
-void smp_send_nmi_allbutself(void);
-#define IF_SMP(x) x
-#undef MAX_NO_CPUS
-#ifndef CONFIG_NO_KGDB_CPUS
-#define CONFIG_NO_KGDB_CPUS 2
-#endif
-#if CONFIG_NO_KGDB_CPUS > NR_CPUS
-#define MAX_NO_CPUS NR_CPUS
-#else
-#define MAX_NO_CPUS CONFIG_NO_KGDB_CPUS
-#endif
-#define hold_init hold_on_sstep: 1,
-#define MAX_CPU_MASK (unsigned long)((1LL << MAX_NO_CPUS) - 1LL)
-#define NUM_CPUS num_online_cpus()
-#else
-#define IF_SMP(x)
-#define hold_init
-#undef MAX_NO_CPUS
-#define MAX_NO_CPUS 1
-#define NUM_CPUS 1
-#endif
-#define NOCPU (struct task_struct *)0xbad1fbad
-/* *INDENT-OFF* */
-struct kgdb_info {
- int used_malloc;
- void *called_from;
- long long entry_tsc;
- int errcode;
- int vector;
- int print_debug_info;
-#ifdef CONFIG_SMP
- int hold_on_sstep;
- struct {
- volatile struct task_struct *task;
- int pid;
- int hold;
- struct pt_regs *regs;
- } cpus_waiting[MAX_NO_CPUS];
-#endif
-} kgdb_info = {hold_init print_debug_info:REMOTE_DEBUG, vector:-1};
-
-/* *INDENT-ON* */
-
-#define used_m kgdb_info.used_malloc
-/*
- * This is little area we set aside to contain the stack we
- * need to build to allow gdb to call functions. We use one
- * per cpu to avoid locking issues. We will do all this work
- * with interrupts off so that should take care of the protection
- * issues.
- */
-#define LOOKASIDE_SIZE 200 /* should be more than enough */
-#define MALLOC_MAX 200 /* Max malloc size */
-struct {
- unsigned int esp;
- int array[LOOKASIDE_SIZE];
-} fn_call_lookaside[MAX_NO_CPUS];
-
-static int trap_cpu;
static unsigned int OLD_esp;
-#define END_OF_LOOKASIDE &fn_call_lookaside[trap_cpu].array[LOOKASIDE_SIZE]
#define IF_BIT 0x200
#define TF_BIT 0x100
-#define MALLOC_ROUND 8-1
-
-static char malloc_array[MALLOC_MAX];
-IF_SMP(static void to_gdb(const char *mess));
-void *
-malloc(int size)
-{
-
- if (size <= (MALLOC_MAX - used_m)) {
- int old_used = used_m;
- used_m += ((size + MALLOC_ROUND) & (~MALLOC_ROUND));
- return &malloc_array[old_used];
- } else {
- return NULL;
- }
-}
-
-/*
- * I/O dispatch functions...
- * Based upon kgdb_eth, either call the ethernet
- * handler or the serial one..
- */
-void
-putDebugChar(int c)
-{
- if (kgdb_eth == -1) {
- tty_putDebugChar(c);
- } else {
- eth_putDebugChar(c);
- }
-}
-
-int
-getDebugChar(void)
-{
- if (kgdb_eth == -1) {
- return tty_getDebugChar();
- } else {
- return eth_getDebugChar();
- }
-}
-
-void
-flushDebugChar(void)
-{
- if (kgdb_eth == -1) {
- tty_flushDebugChar();
- } else {
- eth_flushDebugChar();
- }
-}
/*
* Gdb calls functions by pushing agruments, including a return address
@@ -345,7 +104,7 @@
*/
extern asmlinkage void fn_call_stub(void);
extern asmlinkage void fn_rtn_stub(void);
-/* *INDENT-OFF* */
+
__asm__("fn_rtn_stub:\n\t"
"movl %eax,%esp\n\t"
"fn_call_stub:\n\t"
@@ -359,213 +118,11 @@
"popl %ebx\n\t"
"popl %ecx\n\t"
"iret \n\t");
-/* *INDENT-ON* */
+
#define gdb_i386vector kgdb_info.vector
#define gdb_i386errcode kgdb_info.errcode
-#define waiting_cpus kgdb_info.cpus_waiting
-#define remote_debug kgdb_info.print_debug_info
-#define hold_cpu(cpu) kgdb_info.cpus_waiting[cpu].hold
-/* gdb locks */
-
-#ifdef CONFIG_SMP
-static int in_kgdb_called;
-static spinlock_t waitlocks[MAX_NO_CPUS] =
- {[0 ... MAX_NO_CPUS - 1] = SPIN_LOCK_UNLOCKED };
-/*
- * The following array has the thread pointer of each of the "other"
- * cpus. We make it global so it can be seen by gdb.
- */
-volatile int in_kgdb_entry_log[MAX_NO_CPUS];
-volatile struct pt_regs *in_kgdb_here_log[MAX_NO_CPUS];
-/*
-static spinlock_t continuelocks[MAX_NO_CPUS];
-*/
-spinlock_t kgdb_spinlock = SPIN_LOCK_UNLOCKED;
-/* waiters on our spinlock plus us */
-static atomic_t spinlock_waiters = ATOMIC_INIT(1);
-static int spinlock_count = 0;
-static int spinlock_cpu = 0;
-/*
- * Note we use nested spin locks to account for the case where a break
- * point is encountered when calling a function by user direction from
- * kgdb. Also there is the memory exception recursion to account for.
- * Well, yes, but this lets other cpus thru too. Lets add a
- * cpu id to the lock.
- */
-#define KGDB_SPIN_LOCK(x) if( spinlock_count == 0 || \
- spinlock_cpu != smp_processor_id()){\
- atomic_inc(&spinlock_waiters); \
- while (! spin_trylock(x)) {\
- in_kgdb(®s);\
- }\
- atomic_dec(&spinlock_waiters); \
- spinlock_count = 1; \
- spinlock_cpu = smp_processor_id(); \
- }else{ \
- spinlock_count++; \
- }
-#define KGDB_SPIN_UNLOCK(x) if( --spinlock_count == 0) spin_unlock(x)
-#else
-unsigned kgdb_spinlock = 0;
-#define KGDB_SPIN_LOCK(x) --*x
-#define KGDB_SPIN_UNLOCK(x) ++*x
-#endif
-
-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 $<data>#<checksum> */
-void
-getpacket(char *buffer)
-{
- unsigned char checksum;
- unsigned char xmitcsum;
- int i;
- int count;
- char ch;
- do {
- /* wait around for the start character, ignore all other characters */
- while ((ch = (getDebugChar() & 0x7f)) != '$') ;
- 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;
- }
- buffer[count] = 0;
-
- if (ch == '#') {
- xmitcsum = hex(getDebugChar() & 0x7f) << 4;
- xmitcsum += hex(getDebugChar() & 0x7f);
- if ((remote_debug) && (checksum != xmitcsum)) {
- printk
- ("bad checksum. My count = 0x%x, sent=0x%x. buf=%s\n",
- checksum, xmitcsum, buffer);
- }
-
- 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);
-
- if (remote_debug)
- printk("R:%s\n", buffer);
- flushDebugChar();
-}
-
-/* send the packet in buffer. */
-
-void
-putpacket(char *buffer)
-{
- unsigned char checksum;
- int count;
- char ch;
-
- /* $<packet info>#<checksum>. */
-
- if (kgdb_eth == -1) {
- do {
- if (remote_debug)
- printk("T:%s\n", buffer);
- putDebugChar('$');
- checksum = 0;
- count = 0;
-
- while ((ch = buffer[count])) {
- putDebugChar(ch);
- checksum += ch;
- count += 1;
- }
-
- putDebugChar('#');
- putDebugChar(hexchars[checksum >> 4]);
- putDebugChar(hexchars[checksum % 16]);
- flushDebugChar();
-
- } while ((getDebugChar() & 0x7f) != '+');
- } else {
- /*
- * For udp, we can not transfer too much bytes once.
- * We only transfer MAX_SEND_COUNT size bytes each time
- */
-
-#define MAX_SEND_COUNT 30
-
- int send_count = 0, i = 0;
- char send_buf[MAX_SEND_COUNT];
-
- do {
- if (remote_debug)
- printk("T:%s\n", buffer);
- putDebugChar('$');
- checksum = 0;
- count = 0;
- send_count = 0;
- while ((ch = buffer[count])) {
- if (send_count >= MAX_SEND_COUNT) {
- for(i = 0; i < MAX_SEND_COUNT; i++) {
- putDebugChar(send_buf[i]);
- }
- flushDebugChar();
- send_count = 0;
- } else {
- send_buf[send_count] = ch;
- checksum += ch;
- count ++;
- send_count++;
- }
- }
- for(i = 0; i < send_count; i++)
- putDebugChar(send_buf[i]);
- putDebugChar('#');
- putDebugChar(hexchars[checksum >> 4]);
- putDebugChar(hexchars[checksum % 16]);
- flushDebugChar();
- } while ((getDebugChar() & 0x7f) != '+');
- }
-}
-
-static char remcomInBuffer[BUFMAX];
-static char remcomOutBuffer[BUFMAX];
-static short error;
-
-void
-debug_error(char *format, char *parm)
-{
- if (remote_debug)
- printk(format, parm);
-}
static void
print_regs(struct pt_regs *regs)
@@ -658,14 +215,10 @@
#endif
} /* gdb_regs_to_regs */
-extern void scheduling_functions_start_here(void);
-extern void scheduling_functions_end_here(void);
-#define first_sched ((unsigned long) scheduling_functions_start_here)
-#define last_sched ((unsigned long) scheduling_functions_end_here)
int thread_list = 0;
-void
+static void
get_gdb_regs(struct task_struct *p, struct pt_regs *regs, int *gdb_regs)
{
unsigned long stack_page;
@@ -727,20 +280,7 @@
return;
}
-/* Indicate to caller of mem2hex or hex2mem that there has been an
- error. */
-static volatile int mem_err = 0;
-static volatile int mem_err_expected = 0;
-static volatile int mem_err_cnt = 0;
-static int garbage_loc = -1;
-
-int
-get_char(char *addr)
-{
- return *addr;
-}
-
-void
+static void
set_char(char *addr, int val, int may_fault)
{
/*
@@ -756,260 +296,7 @@
*addr = val;
}
-/* convert the memory pointed to by mem into hex, placing result in buf */
-/* return a pointer to the last char put in buf (null) */
-/* If MAY_FAULT is non-zero, then we should set mem_err in response to
- a fault; if zero treat a fault like any other fault in the stub. */
-char *
-mem2hex(char *mem, char *buf, int count, int may_fault)
-{
- int i;
- unsigned char ch;
-
- if (may_fault) {
- mem_err_expected = 1;
- mem_err = 0;
- }
- for (i = 0; i < count; i++) {
- /* printk("%lx = ", mem) ; */
-
- ch = get_char(mem++);
-
- /* printk("%02x\n", ch & 0xFF) ; */
- if (may_fault && mem_err) {
- if (remote_debug)
- printk("Mem fault fetching from addr %lx\n",
- (long) (mem - 1));
- *buf = 0; /* truncate buffer */
- return (buf);
- }
- *buf++ = hexchars[ch >> 4];
- *buf++ = hexchars[ch % 16];
- }
- *buf = 0;
- if (may_fault)
- mem_err_expected = 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 */
-/* NOTE: We use the may fault flag to also indicate if the write is to
- * the registers (0) or "other" memory (!=0)
- */
-char *
-hex2mem(char *buf, char *mem, int count, int may_fault)
-{
- int i;
- unsigned char ch;
-
- if (may_fault) {
- mem_err_expected = 1;
- mem_err = 0;
- }
- for (i = 0; i < count; i++) {
- ch = hex(*buf++) << 4;
- ch = ch + hex(*buf++);
- set_char(mem++, ch, may_fault);
-
- if (may_fault && mem_err) {
- if (remote_debug)
- printk("Mem fault storing to addr %lx\n",
- (long) (mem - 1));
- return (mem);
- }
- }
- if (may_fault)
- mem_err_expected = 0;
- return (mem);
-}
-
-/**********************************************/
-/* WHILE WE FIND NICE HEX CHARS, BUILD AN INT */
-/* RETURN NUMBER OF CHARS PROCESSED */
-/**********************************************/
-int
-hexToInt(char **ptr, int *intValue)
-{
- int numChars = 0;
- int hexValue;
- *intValue = 0;
-
- while (**ptr) {
- hexValue = hex(**ptr);
- if (hexValue >= 0) {
- *intValue = (*intValue << 4) | hexValue;
- numChars++;
- } else
- break;
-
- (*ptr)++;
- }
-
- return (numChars);
-}
-
-#define stubhex(h) hex(h)
-#ifdef old_thread_list
-
-static int
-stub_unpack_int(char *buff, int fieldlength)
-{
- int nibble;
- int retval = 0;
-
- while (fieldlength) {
- nibble = stubhex(*buff++);
- retval |= nibble;
- fieldlength--;
- if (fieldlength)
- retval = retval << 4;
- }
- return retval;
-}
-#endif
-static char *
-pack_hex_byte(char *pkt, int byte)
-{
- *pkt++ = hexchars[(byte >> 4) & 0xf];
- *pkt++ = hexchars[(byte & 0xf)];
- return pkt;
-}
-
-#define BUF_THREAD_ID_SIZE 16
-
-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;
-}
-
-#ifdef old_thread_list
-static char *
-unpack_byte(char *buf, int *value)
-{
- *value = stub_unpack_int(buf, 2);
- return buf + 2;
-}
-
-static char *
-unpack_threadid(char *inbuf, threadref * id)
-{
- char *altref;
- char *limit = inbuf + BUF_THREAD_ID_SIZE;
- int x, y;
-
- altref = (char *) id;
-
- while (inbuf < limit) {
- x = stubhex(*inbuf++);
- y = stubhex(*inbuf++);
- *altref++ = (x << 4) | y;
- }
- return inbuf;
-}
-#endif
-void
-int_to_threadref(threadref * id, int value)
-{
- unsigned char *scan;
-
- 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);
-}
-int
-int_to_hex_v(unsigned char * id, int value)
-{
- unsigned char *start = id;
- int shift;
- int ch;
-
- for (shift = 28; shift >= 0; shift -= 4) {
- if ((ch = (value >> shift) & 0xf) || (id != start)) {
- *id = hexchars[ch];
- id++;
- }
- }
- if (id == start)
- *id++ = '0';
- return id - start;
-}
-#ifdef old_thread_list
-
-static int
-threadref_to_int(threadref * ref)
-{
- int i, value = 0;
- unsigned char *scan;
-
- scan = (char *) ref;
- scan += 4;
- i = 4;
- while (i-- > 0)
- value = (value << 8) | ((*scan++) & 0xff);
- return value;
-}
-#endif
-static int
-cmp_str(char *s1, char *s2, int count)
-{
- while (count--) {
- if (*s1++ != *s2++)
- return 0;
- }
- return 1;
-}
-
-#if 1 /* this is a hold over from 2.4 where O(1) was "sometimes" */
-extern struct task_struct *kgdb_get_idle(int cpu);
-#define idle_task(cpu) kgdb_get_idle(cpu)
-#else
-#define idle_task(cpu) init_tasks[cpu]
-#endif
-
-extern int kgdb_pid_init_done;
-
-struct task_struct *
-getthread(int pid)
-{
- struct task_struct *thread;
- if (pid >= PID_MAX && pid <= (PID_MAX + MAX_NO_CPUS)) {
-
- return idle_task(pid - PID_MAX);
- } else {
- /*
- * find_task_by_pid is relatively safe all the time
- * Other pid functions require lock downs which imply
- * that we may be interrupting them (as we get here
- * in the middle of most any lock down).
- * Still we don't want to call until the table exists!
- */
- if (kgdb_pid_init_done){
- thread = find_task_by_pid(pid);
- if (thread) {
- return thread;
- }
- }
- }
- return NULL;
-}
-/* *INDENT-OFF* */
struct hw_breakpoint {
unsigned enabled;
unsigned type;
@@ -1019,7 +306,7 @@
{enabled:0},
{enabled:0},
{enabled:0}};
-/* *INDENT-ON* */
+
unsigned hw_breakpoint_status;
void
correct_hw_break(void)
@@ -1031,7 +318,7 @@
asm volatile ("movl %%db7, %0\n":"=r" (dr7)
:);
- /* *INDENT-OFF* */
+
do {
unsigned addr0, addr1, addr2, addr3;
asm volatile ("movl %%db0, %0\n"
@@ -1042,7 +329,7 @@
"=r"(addr2), "=r"(addr3)
:);
} while (0);
- /* *INDENT-ON* */
+
correctit = 0;
for (breakno = 0; breakno < 3; breakno++) {
breakbit = 2 << (breakno << 1);
@@ -1095,7 +382,7 @@
return 0;
}
-int
+static int
set_hw_break(unsigned breakno, unsigned type, unsigned len, unsigned addr)
{
if (breakinfo[breakno].enabled) {
@@ -1174,9 +461,6 @@
in_kgdb_here_log[cpu] = 0;
kgdb_local_irq_restore(flags);
return 1;
- /*
- spin_unlock(continuelocks + smp_processor_id());
- */
}
void
@@ -1298,16 +582,6 @@
* released.
*/
#ifdef CONFIG_SMP
-
-#if 0
- if (cpu_callout_map & ~MAX_CPU_MASK) {
- printk("kgdb : too many cpus, possibly not mapped"
- " in contiguous space, change MAX_NO_CPUS"
- " in kgdb_stub and make new kernel.\n"
- " cpu_callout_map is %lx\n", cpu_callout_map);
- goto exit_just_unlock;
- }
-#endif
if (spinlock_count == 1) {
int time, end_time, dum;
int i;
@@ -1388,25 +662,7 @@
if (i < num_online_cpus()) {
printk
("kgdb : time out, proceeding without sync\n");
-#if 0
- printk("kgdb : Waiting_cpus: 0 = %d, 1 = %d\n",
- waiting_cpus[0].task != 0,
- waiting_cpus[1].task != 0);
- printk("kgdb : Cpu_logged in: 0 = %d, 1 = %d\n",
- cpu_logged_in[0], cpu_logged_in[1]);
- printk
- ("kgdb : in_kgdb_here_log in: 0 = %d, 1 = %d\n",
- in_kgdb_here_log[0] != 0,
- in_kgdb_here_log[1] != 0);
-#endif
entry_state = NO_SYNC;
- } else {
-#if 0
- int ent =
- in_kgdb_entry_log[smp_processor_id()] -
- me_in_kgdb;
- printk("kgdb : sync after %d entries\n", ent);
-#endif
}
} else {
if (remote_debug) {
@@ -1434,7 +690,7 @@
/* Disable hardware debugging while we are in kgdb */
/* Get the debug register status register */
-/* *INDENT-OFF* */
+
__asm__("movl %0,%%db7"
: /* no output */
:"r"(0));
@@ -1443,7 +699,6 @@
:"=r" (hw_breakpoint_status)
:);
-/* *INDENT-ON* */
switch (exceptionVector) {
case 0: /* divide error */
case 1: /* debug exception */
@@ -1533,7 +788,7 @@
}
kgdb_eth_reply_arp();
- while (1 == 1) {
+ while (1) {
error = 0;
remcomOutBuffer[0] = 0;
getpacket(remcomInBuffer);
@@ -1989,11 +1244,8 @@
/* reply to the request */
putpacket(remcomOutBuffer);
- } /* while(1==1) */
- /*
- * reached by goto only.
- */
- exit_kgdb:
+ } /* while(1) */
+exit_kgdb: /* reached by goto only. */
/*
* Here is where we set up to trap a gdb function call. NEW_esp
* will be changed if we are trying to do this. We handle both
@@ -2072,9 +1324,6 @@
kgdb_local_irq_restore(flags);
return (0);
}
-#if 0
-exit_just_unlock:
-#endif
#endif
/* Release kgdb spinlock */
KGDB_SPIN_UNLOCK(&kgdb_spinlock);
@@ -2106,7 +1355,7 @@
/* In case GDB is started before us, ack any packets (presumably
"$?#xx") sitting there.
- putDebugChar ('+');
+ put_debug_char ('+');
initialized = 1;
*/
@@ -2119,27 +1368,7 @@
/* But really, just use the BREAKPOINT macro. We will handle the int stuff
*/
-#ifdef later
-/*
- * possibly we should not go thru the traps.c code at all? Someday.
- */
-void
-do_kgdb_int3(struct pt_regs *regs, long error_code)
-{
- kgdb_handle_exception(3, 5, error_code, regs);
- return;
-}
-#endif
#undef regs
-#ifdef CONFIG_TRAP_BAD_SYSCALL_EXITS
-asmlinkage void
-bad_sys_call_exit(int stuff)
-{
- struct pt_regs *regs = (struct pt_regs *) &stuff;
- printk("Sys call %d return with %x preempt_count\n",
- (int) regs->orig_eax, preempt_count());
-}
-#endif
#ifdef CONFIG_STACK_OVERFLOW_TEST
#include <asm/kgdb.h>
asmlinkage void
@@ -2150,8 +1379,7 @@
#else
printk("Kernel stack overflow, looping forever\n");
#endif
- while (1) {
- }
+ while (1) ;
}
#endif
@@ -2420,9 +1648,6 @@
kgdb_and_then = &kgdb_data[++kgdb_and_then_count & INDEX_MASK];
spin_unlock(&ts_spin);
kgdb_local_irq_restore(flags);
-#ifdef CONFIG_PREEMPT
-
-#endif
return;
}
#endif
@@ -2483,7 +1708,6 @@
return parse_hw_addr(str, kgdb_localmac);
}
-
__setup("gdbeth=", kgdb_opt_kgdbeth);
__setup("gdbeth_remoteip=", kgdb_opt_kgdbeth_remoteip);
__setup("gdbeth_listenport=", kgdb_opt_kgdbeth_listenport);
--- tmp/linux/drivers/net/kgdb_eth.c 2004-01-09 19:04:43.000000000 +0100
+++ linux/drivers/net/kgdb_eth.c 2003-12-28 21:00:24.000000000 +0100
@@ -39,12 +39,12 @@
#define GDB_BUF_SIZE 512 /* power of 2, please */
-static char kgdb_buf[GDB_BUF_SIZE] ;
-static int kgdb_buf_in_inx ;
-static atomic_t kgdb_buf_in_cnt ;
-static int kgdb_buf_out_inx ;
+static char kgdb_buf[GDB_BUF_SIZE];
+static int kgdb_buf_in_inx;
+static atomic_t kgdb_buf_in_cnt;
+static int kgdb_buf_out_inx;
-extern void set_debug_traps(void) ; /* GDB routine */
+extern void set_debug_traps(void); /* GDB routine */
extern void breakpoint(void);
unsigned int kgdb_remoteip = 0;
@@ -479,8 +479,7 @@
put_char_on_queue(int chr)
{
eth_queue[outgoing_queue++] = chr;
- if(outgoing_queue == ETH_QUEUE_SIZE)
- {
+ if(outgoing_queue == ETH_QUEUE_SIZE) {
eth_flushDebugChar();
}
}
--- tmp/linux/include/asm-i386/kgdb_local.h 2004-01-09 19:04:44.000000000 +0100
+++ linux/include/asm-i386/kgdb_local.h 2003-12-28 21:21:55.000000000 +0100
@@ -83,7 +83,7 @@
tty: (struct tty_struct *)&state, \
IER: SB_IER, \
MCR: SB_MCR}
-extern void putDebugChar(int);
+extern void put_debug_char(int);
/* RTAI support needs us to really stop/start interrupts */
#define kgdb_sti() __asm__ __volatile__("sti": : :"memory")
@@ -98,5 +98,5 @@
#ifdef CONFIG_SERIAL
extern void shutdown_for_kgdb(struct async_struct *info);
#endif
-#define INIT_KDEBUG putDebugChar("+");
+#define INIT_KDEBUG put_debug_char("+"); /* WTF is this? it expects integer! */
#endif /* __KGDB_LOCAL */
--- tmp/linux/include/linux/dwarf2-lang.h 2004-01-09 19:04:44.000000000 +0100
+++ linux/include/linux/dwarf2-lang.h 2003-12-27 17:12:38.000000000 +0100
@@ -1,132 +0,0 @@
-#ifndef DWARF2_LANG
-#define DWARF2_LANG
-#include <linux/dwarf2.h>
-
-/*
- * 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.
- */
-#define DWARF_preamble() .section .debug_frame,"",@progbits
-/*
- * 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) \
-.section .debug_frame,"",@progbits ; \
-frame/**/_/**/ORD: \
- .long end/**/_/**/ORD-start/**/_/**/ORD; \
-start/**/_/**/ORD: \
- .long DW_CIE_ID; \
- .byte DW_CIE_VERSION; \
- .byte 0 ; \
- .uleb128 code_align; \
- .sleb128 data_align; \
- .byte pc;
-
-/*
- * 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; \
- .uleb128 reg; \
- .uleb128 (offset);
-
-#define CFA_define_offset(reg, offset) \
- .byte (DW_CFA_offset + reg); \
- .uleb128 (offset);
-
-#define CFI_postamble(ORD) \
- .align 4; \
-end/**/_/**/ORD:
-/*
- * 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 first entry after the preamble must be the location in the code
- * that the call frame is being described for.
- */
-#define FDE_preamble(ORD, fde_no, initial_address, length) \
- .long FDE_end/**/_/**/fde_no-FDE_start/**/_/**/fde_no; \
-FDE_start/**/_/**/fde_no: \
- .long frame/**/_/**/ORD; \
- .long initial_address; \
- .long length;
-
-#define FDE_postamble(fde_no) \
- .align 4; \
-FDE_end/**/_/**/fde_no:
-/*
- * 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 address by <bytes>
- */
-
-#define FDE_advance(bytes) \
- .byte DW_CFA_advance_loc4 \
- .long bytes
-
-
-
-/*
- * 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; \
- .uleb128 (offset);
-/*
- * Or suppose you want to use a different reference register...
- */
-#define CFA_define_cfa_register(reg) \
- .byte DW_CFA_def_cfa_register; \
- .uleb128 reg;
-
-#endif
--- tmp/linux/include/linux/dwarf2.h 2004-01-09 19:04:44.000000000 +0100
+++ linux/include/linux/dwarf2.h 2003-12-27 17:12:40.000000000 +0100
@@ -1,738 +0,0 @@
-/* Declarations and definitions of codes relating to the DWARF2 symbolic
- debugging information format.
- Copyright (C) 1992, 1993, 1995, 1996, 1997, 1999, 2000, 2001, 2002
- 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. */
-#ifndef __ASSEMBLY__
-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;
-
-#define ENUM(name) enum name {
-#define IF_NOT_ASM(a) a
-#define COMMA ,
-#else
-#define ENUM(name)
-#define IF_NOT_ASM(a)
-#define COMMA
-
-#endif
-
-/* Tag names and codes. */
-ENUM(dwarf_tag)
-
- DW_TAG_padding = 0x00 COMMA
- DW_TAG_array_type = 0x01 COMMA
- DW_TAG_class_type = 0x02 COMMA
- DW_TAG_entry_point = 0x03 COMMA
- DW_TAG_enumeration_type = 0x04 COMMA
- DW_TAG_formal_parameter = 0x05 COMMA
- DW_TAG_imported_declaration = 0x08 COMMA
- DW_TAG_label = 0x0a COMMA
- DW_TAG_lexical_block = 0x0b COMMA
- DW_TAG_member = 0x0d COMMA
- DW_TAG_pointer_type = 0x0f COMMA
- DW_TAG_reference_type = 0x10 COMMA
- DW_TAG_compile_unit = 0x11 COMMA
- DW_TAG_string_type = 0x12 COMMA
- DW_TAG_structure_type = 0x13 COMMA
- DW_TAG_subroutine_type = 0x15 COMMA
- DW_TAG_typedef = 0x16 COMMA
- DW_TAG_union_type = 0x17 COMMA
- DW_TAG_unspecified_parameters = 0x18 COMMA
- DW_TAG_variant = 0x19 COMMA
- DW_TAG_common_block = 0x1a COMMA
- DW_TAG_common_inclusion = 0x1b COMMA
- DW_TAG_inheritance = 0x1c COMMA
- DW_TAG_inlined_subroutine = 0x1d COMMA
- DW_TAG_module = 0x1e COMMA
- DW_TAG_ptr_to_member_type = 0x1f COMMA
- DW_TAG_set_type = 0x20 COMMA
- DW_TAG_subrange_type = 0x21 COMMA
- DW_TAG_with_stmt = 0x22 COMMA
- DW_TAG_access_declaration = 0x23 COMMA
- DW_TAG_base_type = 0x24 COMMA
- DW_TAG_catch_block = 0x25 COMMA
- DW_TAG_const_type = 0x26 COMMA
- DW_TAG_constant = 0x27 COMMA
- DW_TAG_enumerator = 0x28 COMMA
- DW_TAG_file_type = 0x29 COMMA
- DW_TAG_friend = 0x2a COMMA
- DW_TAG_namelist = 0x2b COMMA
- DW_TAG_namelist_item = 0x2c COMMA
- DW_TAG_packed_type = 0x2d COMMA
- DW_TAG_subprogram = 0x2e COMMA
- DW_TAG_template_type_param = 0x2f COMMA
- DW_TAG_template_value_param = 0x30 COMMA
- DW_TAG_thrown_type = 0x31 COMMA
- DW_TAG_try_block = 0x32 COMMA
- DW_TAG_variant_part = 0x33 COMMA
- DW_TAG_variable = 0x34 COMMA
- DW_TAG_volatile_type = 0x35 COMMA
- /* DWARF 3. */
- DW_TAG_dwarf_procedure = 0x36 COMMA
- DW_TAG_restrict_type = 0x37 COMMA
- DW_TAG_interface_type = 0x38 COMMA
- DW_TAG_namespace = 0x39 COMMA
- DW_TAG_imported_module = 0x3a COMMA
- DW_TAG_unspecified_type = 0x3b COMMA
- DW_TAG_partial_unit = 0x3c COMMA
- DW_TAG_imported_unit = 0x3d COMMA
- /* SGI/MIPS Extensions. */
- DW_TAG_MIPS_loop = 0x4081 COMMA
- /* GNU extensions. */
- DW_TAG_format_label = 0x4101 COMMA /* For FORTRAN 77 and Fortran 90. */
- DW_TAG_function_template = 0x4102 COMMA /* For C++. */
- DW_TAG_class_template = 0x4103 COMMA /* For C++. */
- DW_TAG_GNU_BINCL = 0x4104 COMMA
- DW_TAG_GNU_EINCL = 0x4105 COMMA
- /* Extensions for UPC. See: http://upc.gwu.edu/~upc. */
- DW_TAG_upc_shared_type = 0x8765 COMMA
- DW_TAG_upc_strict_type = 0x8766 COMMA
- DW_TAG_upc_relaxed_type = 0x8767
-IF_NOT_ASM(};)
-
-#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 COMMA
- DW_FORM_block2 = 0x03 COMMA
- DW_FORM_block4 = 0x04 COMMA
- DW_FORM_data2 = 0x05 COMMA
- DW_FORM_data4 = 0x06 COMMA
- DW_FORM_data8 = 0x07 COMMA
- DW_FORM_string = 0x08 COMMA
- DW_FORM_block = 0x09 COMMA
- DW_FORM_block1 = 0x0a COMMA
- DW_FORM_data1 = 0x0b COMMA
- DW_FORM_flag = 0x0c COMMA
- DW_FORM_sdata = 0x0d COMMA
- DW_FORM_strp = 0x0e COMMA
- DW_FORM_udata = 0x0f COMMA
- DW_FORM_ref_addr = 0x10 COMMA
- DW_FORM_ref1 = 0x11 COMMA
- DW_FORM_ref2 = 0x12 COMMA
- DW_FORM_ref4 = 0x13 COMMA
- DW_FORM_ref8 = 0x14 COMMA
- DW_FORM_ref_udata = 0x15 COMMA
- DW_FORM_indirect = 0x16
-IF_NOT_ASM(};)
-
-/* Attribute names and codes. */
-
-ENUM(dwarf_attribute)
-
- DW_AT_sibling = 0x01 COMMA
- DW_AT_location = 0x02 COMMA
- DW_AT_name = 0x03 COMMA
- DW_AT_ordering = 0x09 COMMA
- DW_AT_subscr_data = 0x0a COMMA
- DW_AT_byte_size = 0x0b COMMA
- DW_AT_bit_offset = 0x0c COMMA
- DW_AT_bit_size = 0x0d COMMA
- DW_AT_element_list = 0x0f COMMA
- DW_AT_stmt_list = 0x10 COMMA
- DW_AT_low_pc = 0x11 COMMA
- DW_AT_high_pc = 0x12 COMMA
- DW_AT_language = 0x13 COMMA
- DW_AT_member = 0x14 COMMA
- DW_AT_discr = 0x15 COMMA
- DW_AT_discr_value = 0x16 COMMA
- DW_AT_visibility = 0x17 COMMA
- DW_AT_import = 0x18 COMMA
- DW_AT_string_length = 0x19 COMMA
- DW_AT_common_reference = 0x1a COMMA
- DW_AT_comp_dir = 0x1b COMMA
- DW_AT_const_value = 0x1c COMMA
- DW_AT_containing_type = 0x1d COMMA
- DW_AT_default_value = 0x1e COMMA
- DW_AT_inline = 0x20 COMMA
- DW_AT_is_optional = 0x21 COMMA
- DW_AT_lower_bound = 0x22 COMMA
- DW_AT_producer = 0x25 COMMA
- DW_AT_prototyped = 0x27 COMMA
- DW_AT_return_addr = 0x2a COMMA
- DW_AT_start_scope = 0x2c COMMA
- DW_AT_stride_size = 0x2e COMMA
- DW_AT_upper_bound = 0x2f COMMA
- DW_AT_abstract_origin = 0x31 COMMA
- DW_AT_accessibility = 0x32 COMMA
- DW_AT_address_class = 0x33 COMMA
- DW_AT_artificial = 0x34 COMMA
- DW_AT_base_types = 0x35 COMMA
- DW_AT_calling_convention = 0x36 COMMA
- DW_AT_count = 0x37 COMMA
- DW_AT_data_member_location = 0x38 COMMA
- DW_AT_decl_column = 0x39 COMMA
- DW_AT_decl_file = 0x3a COMMA
- DW_AT_decl_line = 0x3b COMMA
- DW_AT_declaration = 0x3c COMMA
- DW_AT_discr_list = 0x3d COMMA
- DW_AT_encoding = 0x3e COMMA
- DW_AT_external = 0x3f COMMA
- DW_AT_frame_base = 0x40 COMMA
- DW_AT_friend = 0x41 COMMA
- DW_AT_identifier_case = 0x42 COMMA
- DW_AT_macro_info = 0x43 COMMA
- DW_AT_namelist_items = 0x44 COMMA
- DW_AT_priority = 0x45 COMMA
- DW_AT_segment = 0x46 COMMA
- DW_AT_specification = 0x47 COMMA
- DW_AT_static_link = 0x48 COMMA
- DW_AT_type = 0x49 COMMA
- DW_AT_use_location = 0x4a COMMA
- DW_AT_variable_parameter = 0x4b COMMA
- DW_AT_virtuality = 0x4c COMMA
- DW_AT_vtable_elem_location = 0x4d COMMA
- /* DWARF 3 values. */
- DW_AT_allocated = 0x4e COMMA
- DW_AT_associated = 0x4f COMMA
- DW_AT_data_location = 0x50 COMMA
- DW_AT_stride = 0x51 COMMA
- DW_AT_entry_pc = 0x52 COMMA
- DW_AT_use_UTF8 = 0x53 COMMA
- DW_AT_extension = 0x54 COMMA
- DW_AT_ranges = 0x55 COMMA
- DW_AT_trampoline = 0x56 COMMA
- DW_AT_call_column = 0x57 COMMA
- DW_AT_call_file = 0x58 COMMA
- DW_AT_call_line = 0x59 COMMA
- /* SGI/MIPS extensions. */
- DW_AT_MIPS_fde = 0x2001 COMMA
- DW_AT_MIPS_loop_begin = 0x2002 COMMA
- DW_AT_MIPS_tail_loop_begin = 0x2003 COMMA
- DW_AT_MIPS_epilog_begin = 0x2004 COMMA
- DW_AT_MIPS_loop_unroll_factor = 0x2005 COMMA
- DW_AT_MIPS_software_pipeline_depth = 0x2006 COMMA
- DW_AT_MIPS_linkage_name = 0x2007 COMMA
- DW_AT_MIPS_stride = 0x2008 COMMA
- DW_AT_MIPS_abstract_name = 0x2009 COMMA
- DW_AT_MIPS_clone_origin = 0x200a COMMA
- DW_AT_MIPS_has_inlines = 0x200b COMMA
- /* GNU extensions. */
- DW_AT_sf_names = 0x2101 COMMA
- DW_AT_src_info = 0x2102 COMMA
- DW_AT_mac_info = 0x2103 COMMA
- DW_AT_src_coords = 0x2104 COMMA
- DW_AT_body_begin = 0x2105 COMMA
- DW_AT_body_end = 0x2106 COMMA
- DW_AT_GNU_vector = 0x2107 COMMA
- /* VMS extensions. */
- DW_AT_VMS_rtnbeg_pd_address = 0x2201 COMMA
- /* UPC extension. */
- DW_AT_upc_threads_scaled = 0x3210
-IF_NOT_ASM(};)
-
-#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 COMMA
- DW_OP_deref = 0x06 COMMA
- DW_OP_const1u = 0x08 COMMA
- DW_OP_const1s = 0x09 COMMA
- DW_OP_const2u = 0x0a COMMA
- DW_OP_const2s = 0x0b COMMA
- DW_OP_const4u = 0x0c COMMA
- DW_OP_const4s = 0x0d COMMA
- DW_OP_const8u = 0x0e COMMA
- DW_OP_const8s = 0x0f COMMA
- DW_OP_constu = 0x10 COMMA
- DW_OP_consts = 0x11 COMMA
- DW_OP_dup = 0x12 COMMA
- DW_OP_drop = 0x13 COMMA
- DW_OP_over = 0x14 COMMA
- DW_OP_pick = 0x15 COMMA
- DW_OP_swap = 0x16 COMMA
- DW_OP_rot = 0x17 COMMA
- DW_OP_xderef = 0x18 COMMA
- DW_OP_abs = 0x19 COMMA
- DW_OP_and = 0x1a COMMA
- DW_OP_div = 0x1b COMMA
- DW_OP_minus = 0x1c COMMA
- DW_OP_mod = 0x1d COMMA
- DW_OP_mul = 0x1e COMMA
- DW_OP_neg = 0x1f COMMA
- DW_OP_not = 0x20 COMMA
- DW_OP_or = 0x21 COMMA
- DW_OP_plus = 0x22 COMMA
- DW_OP_plus_uconst = 0x23 COMMA
- DW_OP_shl = 0x24 COMMA
- DW_OP_shr = 0x25 COMMA
- DW_OP_shra = 0x26 COMMA
- DW_OP_xor = 0x27 COMMA
- DW_OP_bra = 0x28 COMMA
- DW_OP_eq = 0x29 COMMA
- DW_OP_ge = 0x2a COMMA
- DW_OP_gt = 0x2b COMMA
- DW_OP_le = 0x2c COMMA
- DW_OP_lt = 0x2d COMMA
- DW_OP_ne = 0x2e COMMA
- DW_OP_skip = 0x2f COMMA
- DW_OP_lit0 = 0x30 COMMA
- DW_OP_lit1 = 0x31 COMMA
- DW_OP_lit2 = 0x32 COMMA
- DW_OP_lit3 = 0x33 COMMA
- DW_OP_lit4 = 0x34 COMMA
- DW_OP_lit5 = 0x35 COMMA
- DW_OP_lit6 = 0x36 COMMA
- DW_OP_lit7 = 0x37 COMMA
- DW_OP_lit8 = 0x38 COMMA
- DW_OP_lit9 = 0x39 COMMA
- DW_OP_lit10 = 0x3a COMMA
- DW_OP_lit11 = 0x3b COMMA
- DW_OP_lit12 = 0x3c COMMA
- DW_OP_lit13 = 0x3d COMMA
- DW_OP_lit14 = 0x3e COMMA
- DW_OP_lit15 = 0x3f COMMA
- DW_OP_lit16 = 0x40 COMMA
- DW_OP_lit17 = 0x41 COMMA
- DW_OP_lit18 = 0x42 COMMA
- DW_OP_lit19 = 0x43 COMMA
- DW_OP_lit20 = 0x44 COMMA
- DW_OP_lit21 = 0x45 COMMA
- DW_OP_lit22 = 0x46 COMMA
- DW_OP_lit23 = 0x47 COMMA
- DW_OP_lit24 = 0x48 COMMA
- DW_OP_lit25 = 0x49 COMMA
- DW_OP_lit26 = 0x4a COMMA
- DW_OP_lit27 = 0x4b COMMA
- DW_OP_lit28 = 0x4c COMMA
- DW_OP_lit29 = 0x4d COMMA
- DW_OP_lit30 = 0x4e COMMA
- DW_OP_lit31 = 0x4f COMMA
- DW_OP_reg0 = 0x50 COMMA
- DW_OP_reg1 = 0x51 COMMA
- DW_OP_reg2 = 0x52 COMMA
- DW_OP_reg3 = 0x53 COMMA
- DW_OP_reg4 = 0x54 COMMA
- DW_OP_reg5 = 0x55 COMMA
- DW_OP_reg6 = 0x56 COMMA
- DW_OP_reg7 = 0x57 COMMA
- DW_OP_reg8 = 0x58 COMMA
- DW_OP_reg9 = 0x59 COMMA
- DW_OP_reg10 = 0x5a COMMA
- DW_OP_reg11 = 0x5b COMMA
- DW_OP_reg12 = 0x5c COMMA
- DW_OP_reg13 = 0x5d COMMA
- DW_OP_reg14 = 0x5e COMMA
- DW_OP_reg15 = 0x5f COMMA
- DW_OP_reg16 = 0x60 COMMA
- DW_OP_reg17 = 0x61 COMMA
- DW_OP_reg18 = 0x62 COMMA
- DW_OP_reg19 = 0x63 COMMA
- DW_OP_reg20 = 0x64 COMMA
- DW_OP_reg21 = 0x65 COMMA
- DW_OP_reg22 = 0x66 COMMA
- DW_OP_reg23 = 0x67 COMMA
- DW_OP_reg24 = 0x68 COMMA
- DW_OP_reg25 = 0x69 COMMA
- DW_OP_reg26 = 0x6a COMMA
- DW_OP_reg27 = 0x6b COMMA
- DW_OP_reg28 = 0x6c COMMA
- DW_OP_reg29 = 0x6d COMMA
- DW_OP_reg30 = 0x6e COMMA
- DW_OP_reg31 = 0x6f COMMA
- DW_OP_breg0 = 0x70 COMMA
- DW_OP_breg1 = 0x71 COMMA
- DW_OP_breg2 = 0x72 COMMA
- DW_OP_breg3 = 0x73 COMMA
- DW_OP_breg4 = 0x74 COMMA
- DW_OP_breg5 = 0x75 COMMA
- DW_OP_breg6 = 0x76 COMMA
- DW_OP_breg7 = 0x77 COMMA
- DW_OP_breg8 = 0x78 COMMA
- DW_OP_breg9 = 0x79 COMMA
- DW_OP_breg10 = 0x7a COMMA
- DW_OP_breg11 = 0x7b COMMA
- DW_OP_breg12 = 0x7c COMMA
- DW_OP_breg13 = 0x7d COMMA
- DW_OP_breg14 = 0x7e COMMA
- DW_OP_breg15 = 0x7f COMMA
- DW_OP_breg16 = 0x80 COMMA
- DW_OP_breg17 = 0x81 COMMA
- DW_OP_breg18 = 0x82 COMMA
- DW_OP_breg19 = 0x83 COMMA
- DW_OP_breg20 = 0x84 COMMA
- DW_OP_breg21 = 0x85 COMMA
- DW_OP_breg22 = 0x86 COMMA
- DW_OP_breg23 = 0x87 COMMA
- DW_OP_breg24 = 0x88 COMMA
- DW_OP_breg25 = 0x89 COMMA
- DW_OP_breg26 = 0x8a COMMA
- DW_OP_breg27 = 0x8b COMMA
- DW_OP_breg28 = 0x8c COMMA
- DW_OP_breg29 = 0x8d COMMA
- DW_OP_breg30 = 0x8e COMMA
- DW_OP_breg31 = 0x8f COMMA
- DW_OP_regx = 0x90 COMMA
- DW_OP_fbreg = 0x91 COMMA
- DW_OP_bregx = 0x92 COMMA
- DW_OP_piece = 0x93 COMMA
- DW_OP_deref_size = 0x94 COMMA
- DW_OP_xderef_size = 0x95 COMMA
- DW_OP_nop = 0x96 COMMA
- /* DWARF 3 extensions. */
- DW_OP_push_object_address = 0x97 COMMA
- DW_OP_call2 = 0x98 COMMA
- DW_OP_call4 = 0x99 COMMA
- DW_OP_call_ref = 0x9a COMMA
- /* GNU extensions. */
- DW_OP_GNU_push_tls_address = 0xe0
-IF_NOT_ASM(};)
-
-#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 COMMA
- DW_ATE_address = 0x1 COMMA
- DW_ATE_boolean = 0x2 COMMA
- DW_ATE_complex_float = 0x3 COMMA
- DW_ATE_float = 0x4 COMMA
- DW_ATE_signed = 0x5 COMMA
- DW_ATE_signed_char = 0x6 COMMA
- DW_ATE_unsigned = 0x7 COMMA
- DW_ATE_unsigned_char = 0x8 COMMA
- /* DWARF 3. */
- DW_ATE_imaginary_float = 0x9
-IF_NOT_ASM(};)
-
-#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 COMMA
- DW_ORD_col_major = 1
-IF_NOT_ASM(};)
-
-/* Access attribute. */
-ENUM(dwarf_access_attribute)
-
- DW_ACCESS_public = 1 COMMA
- DW_ACCESS_protected = 2 COMMA
- DW_ACCESS_private = 3
-IF_NOT_ASM(};)
-
-/* Visibility. */
-ENUM(dwarf_visibility_attribute)
-
- DW_VIS_local = 1 COMMA
- DW_VIS_exported = 2 COMMA
- DW_VIS_qualified = 3
-IF_NOT_ASM(};)
-
-/* Virtuality. */
-ENUM(dwarf_virtuality_attribute)
-
- DW_VIRTUALITY_none = 0 COMMA
- DW_VIRTUALITY_virtual = 1 COMMA
- DW_VIRTUALITY_pure_virtual = 2
-IF_NOT_ASM(};)
-
-/* Case sensitivity. */
-ENUM(dwarf_id_case)
-
- DW_ID_case_sensitive = 0 COMMA
- DW_ID_up_case = 1 COMMA
- DW_ID_down_case = 2 COMMA
- DW_ID_case_insensitive = 3
-IF_NOT_ASM(};)
-
-/* Calling convention. */
-ENUM(dwarf_calling_convention)
-
- DW_CC_normal = 0x1 COMMA
- DW_CC_program = 0x2 COMMA
- DW_CC_nocall = 0x3
-IF_NOT_ASM(};)
-
-#define DW_CC_lo_user 0x40
-#define DW_CC_hi_user 0xff
-
-/* Inline attribute. */
-ENUM(dwarf_inline_attribute)
-
- DW_INL_not_inlined = 0 COMMA
- DW_INL_inlined = 1 COMMA
- DW_INL_declared_not_inlined = 2 COMMA
- DW_INL_declared_inlined = 3
-IF_NOT_ASM(};)
-
-/* Discriminant lists. */
-ENUM(dwarf_discrim_list)
-
- DW_DSC_label = 0 COMMA
- DW_DSC_range = 1
-IF_NOT_ASM(};)
-
-/* Line number opcodes. */
-ENUM(dwarf_line_number_ops)
-
- DW_LNS_extended_op = 0 COMMA
- DW_LNS_copy = 1 COMMA
- DW_LNS_advance_pc = 2 COMMA
- DW_LNS_advance_line = 3 COMMA
- DW_LNS_set_file = 4 COMMA
- DW_LNS_set_column = 5 COMMA
- DW_LNS_negate_stmt = 6 COMMA
- DW_LNS_set_basic_block = 7 COMMA
- DW_LNS_const_add_pc = 8 COMMA
- DW_LNS_fixed_advance_pc = 9 COMMA
- /* DWARF 3. */
- DW_LNS_set_prologue_end = 10 COMMA
- DW_LNS_set_epilogue_begin = 11 COMMA
- DW_LNS_set_isa = 12
-IF_NOT_ASM(};)
-
-/* Line number extended opcodes. */
-ENUM(dwarf_line_number_x_ops)
-
- DW_LNE_end_sequence = 1 COMMA
- DW_LNE_set_address = 2 COMMA
- DW_LNE_define_file = 3
-IF_NOT_ASM(};)
-
-/* Call frame information. */
-ENUM(dwarf_call_frame_info)
-
- DW_CFA_advance_loc = 0x40 COMMA
- DW_CFA_offset = 0x80 COMMA
- DW_CFA_restore = 0xc0 COMMA
- DW_CFA_nop = 0x00 COMMA
- DW_CFA_set_loc = 0x01 COMMA
- DW_CFA_advance_loc1 = 0x02 COMMA
- DW_CFA_advance_loc2 = 0x03 COMMA
- DW_CFA_advance_loc4 = 0x04 COMMA
- DW_CFA_offset_extended = 0x05 COMMA
- DW_CFA_restore_extended = 0x06 COMMA
- DW_CFA_undefined = 0x07 COMMA
- DW_CFA_same_value = 0x08 COMMA
- DW_CFA_register = 0x09 COMMA
- DW_CFA_remember_state = 0x0a COMMA
- DW_CFA_restore_state = 0x0b COMMA
- DW_CFA_def_cfa = 0x0c COMMA
- DW_CFA_def_cfa_register = 0x0d COMMA
- DW_CFA_def_cfa_offset = 0x0e COMMA
-
- /* DWARF 3. */
- DW_CFA_def_cfa_expression = 0x0f COMMA
- DW_CFA_expression = 0x10 COMMA
- DW_CFA_offset_extended_sf = 0x11 COMMA
- DW_CFA_def_cfa_sf = 0x12 COMMA
- DW_CFA_def_cfa_offset_sf = 0x13 COMMA
-
- /* SGI/MIPS specific. */
- DW_CFA_MIPS_advance_loc8 = 0x1d COMMA
-
- /* GNU extensions. */
- DW_CFA_GNU_window_save = 0x2d COMMA
- DW_CFA_GNU_args_size = 0x2e COMMA
- DW_CFA_GNU_negative_offset_extended = 0x2f
-IF_NOT_ASM(};)
-
-#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 COMMA
- DW_LANG_C = 0x0002 COMMA
- DW_LANG_Ada83 = 0x0003 COMMA
- DW_LANG_C_plus_plus = 0x0004 COMMA
- DW_LANG_Cobol74 = 0x0005 COMMA
- DW_LANG_Cobol85 = 0x0006 COMMA
- DW_LANG_Fortran77 = 0x0007 COMMA
- DW_LANG_Fortran90 = 0x0008 COMMA
- DW_LANG_Pascal83 = 0x0009 COMMA
- DW_LANG_Modula2 = 0x000a COMMA
- DW_LANG_Java = 0x000b COMMA
- /* DWARF 3. */
- DW_LANG_C99 = 0x000c COMMA
- DW_LANG_Ada95 = 0x000d COMMA
- DW_LANG_Fortran95 = 0x000e COMMA
- /* MIPS. */
- DW_LANG_Mips_Assembler = 0x8001 COMMA
- /* UPC. */
- DW_LANG_Upc = 0x8765
-IF_NOT_ASM(};)
-
-#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 COMMA
- DW_MACINFO_undef = 2 COMMA
- DW_MACINFO_start_file = 3 COMMA
- DW_MACINFO_end_file = 4 COMMA
- DW_MACINFO_vendor_ext = 255
-IF_NOT_ASM(};)
-
-/* @@@ 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 */
--- tmp/linux/kernel/kgdb.c 2003-12-28 21:06:03.000000000 +0100
+++ linux/kernel/kgdb.c 2003-12-28 21:40:19.000000000 +0100
@@ -0,0 +1,750 @@
+/*
+ * Kernel gdb stub, arch-independend part
+ *
+ * Copyright (c) 2000 VERITAS Software Corporation.
+ * Copyright (c) 2003 Pavel Machek <pavel@suse.cz>
+ *
+ * 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.
+ *
+ */
+/****************************************************************************
+ * 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 $
+ * Updated by: David Grothe <dave@gcom.com>
+ * Updated by: Robert Walsh <rjwalsh@durables.org>
+ * Updated by: wangdi <wangdi@clusterfs.com>
+ * ModuleState: Experimental $
+ *
+ * NOTES: See Below $
+ *
+ * Modified for 386 by Jim Kingdon, Cygnus Support.
+ * Compatibility with 2.1.xx kernel by David Grothe <dave@gcom.com>
+ *
+ * Changes to allow auto initilization. All that is needed is that it
+ * be linked with the kernel and a break point (int 3) be executed.
+ * The header file <asm/kgdb.h> defines BREAKPOINT to allow one to do
+ * this. It should also be possible, once the interrupt system is up, to
+ * call putDebugChar("+"). Once this is done, the remote debugger should
+ * get our attention by sending a ^C in a packet. George Anzinger
+ * <george@mvista.com>
+ * Integrated into 2.2.5 kernel by Tigran Aivazian <tigran@sco.com>
+ * Added thread support, support for multiple processors,
+ * support for ia-32(x86) hardware debugging.
+ * Amit S. Kale ( akale@veritas.com )
+ *
+ * Modified to support debugging over ethernet by Robert Walsh
+ * <rjwalsh@durables.org> and wangdi <wangdi@clusterfs.com>, based on
+ * code by San Mehat.
+ *
+ *
+ * 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 an int 3.
+ *
+ *************
+ *
+ * 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)
+ *
+ * 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
+ *
+ ****************************************************************************/
+
+/*
+ * external low-level support routines
+ */
+typedef void (*Function) (void); /* pointer to a function */
+
+/* Thread reference */
+typedef unsigned char threadref[8];
+
+extern int tty_putDebugChar(int); /* write a single character */
+extern int tty_getDebugChar(void); /* read and return a single char */
+extern void tty_flushDebugChar(void); /* flush pending characters */
+extern int eth_putDebugChar(int); /* write a single character */
+extern int eth_getDebugChar(void); /* read and return a single char */
+extern void eth_flushDebugChar(void); /* flush pending characters */
+extern void kgdb_eth_set_trapmode(int);
+extern void kgdb_eth_reply_arp(void); /* send arp request */
+extern volatile int kgdb_eth_is_initializing;
+
+
+/************************************************************************/
+/* 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 400
+
+char *kgdb_version = KGDB_VERSION;
+
+/* debug > 0 prints ill-formed commands in valid packets & checksum errors */
+int debug_regs = 0; /* set to non-zero to print registers */
+
+/* filled in by an external module */
+char *gdb_module_offsets;
+
+static const char hexchars[] = "0123456789abcdef";
+
+
+/*************************** ASSEMBLY CODE MACROS *************************/
+/*
+ * Put the error code here just in case the user cares.
+ * Likewise, the vector number here (since GDB only gets the signal
+ * number through the usual means, and that's not very specific).
+ * The called_from is the return address so he can tell how we entered kgdb.
+ * This will allow him to seperate out the various possible entries.
+ */
+#define REMOTE_DEBUG 0 /* set != to turn on printing (also available in info) */
+
+#define PID_MAX PID_MAX_DEFAULT
+
+#ifdef CONFIG_SMP
+void smp_send_nmi_allbutself(void);
+#define IF_SMP(x) x
+#undef MAX_NO_CPUS
+#ifndef CONFIG_NO_KGDB_CPUS
+#define CONFIG_NO_KGDB_CPUS 2
+#endif
+#if CONFIG_NO_KGDB_CPUS > NR_CPUS
+#define MAX_NO_CPUS NR_CPUS
+#else
+#define MAX_NO_CPUS CONFIG_NO_KGDB_CPUS
+#endif
+#define hold_init hold_on_sstep: 1,
+#define MAX_CPU_MASK (unsigned long)((1LL << MAX_NO_CPUS) - 1LL)
+#define NUM_CPUS num_online_cpus()
+#else
+#define IF_SMP(x)
+#define hold_init
+#undef MAX_NO_CPUS
+#define MAX_NO_CPUS 1
+#define NUM_CPUS 1
+#endif
+#define NOCPU (struct task_struct *)0xbad1fbad
+
+struct kgdb_info {
+ int used_malloc;
+ void *called_from;
+ long long entry_tsc;
+ int errcode;
+ int vector;
+ int print_debug_info;
+#ifdef CONFIG_SMP
+ int hold_on_sstep;
+ struct {
+ volatile struct task_struct *task;
+ int pid;
+ int hold;
+ struct pt_regs *regs;
+ } cpus_waiting[MAX_NO_CPUS];
+#endif
+} kgdb_info = { hold_init print_debug_info:REMOTE_DEBUG, vector:-1 };
+
+/*
+ * This is little area we set aside to contain the stack we
+ * need to build to allow gdb to call functions. We use one
+ * per cpu to avoid locking issues. We will do all this work
+ * with interrupts off so that should take care of the protection
+ * issues.
+ */
+#define LOOKASIDE_SIZE 200 /* should be more than enough */
+#define MALLOC_MAX 200 /* Max malloc size */
+struct {
+ unsigned int esp;
+ int array[LOOKASIDE_SIZE];
+} fn_call_lookaside[MAX_NO_CPUS];
+
+static int trap_cpu;
+
+#define END_OF_LOOKASIDE &fn_call_lookaside[trap_cpu].array[LOOKASIDE_SIZE]
+
+
+#define MALLOC_ROUND 8-1
+
+static char malloc_array[MALLOC_MAX];
+IF_SMP(static void to_gdb(const char *mess));
+
+/*
+ * Ouch. Apparently, gdb sometimes want to do malloc. It is not used
+ * by the kernel, but do not kill it.
+ */
+void *
+malloc(int size)
+{
+ if (size <= (MALLOC_MAX - kgdb_info.used_malloc)) {
+ int old_used = kgdb_info.used_malloc;
+ kgdb_info.used_malloc += ((size + MALLOC_ROUND) & (~MALLOC_ROUND));
+ return &malloc_array[old_used];
+ } else {
+ return NULL;
+ }
+}
+
+/*
+ * I/O dispatch functions...
+ * Based upon kgdb_eth, either call the ethernet
+ * handler or the serial one..
+ */
+void
+put_debug_char(int c)
+{
+ if (kgdb_eth == -1) {
+ tty_putDebugChar(c);
+ } else {
+ eth_putDebugChar(c);
+ }
+}
+
+static int
+get_debug_char(void)
+{
+ if (kgdb_eth == -1) {
+ return tty_getDebugChar();
+ } else {
+ return eth_getDebugChar();
+ }
+}
+
+static void
+flush_debug_char(void)
+{
+ if (kgdb_eth == -1) {
+ tty_flushDebugChar();
+ } else {
+ eth_flushDebugChar();
+ }
+}
+
+#define waiting_cpus kgdb_info.cpus_waiting
+#define remote_debug kgdb_info.print_debug_info
+#define hold_cpu(cpu) kgdb_info.cpus_waiting[cpu].hold
+/* gdb locks */
+
+#ifdef CONFIG_SMP
+static int in_kgdb_called;
+static spinlock_t waitlocks[MAX_NO_CPUS] =
+ {[0 ... MAX_NO_CPUS - 1] = SPIN_LOCK_UNLOCKED };
+/*
+ * The following array has the thread pointer of each of the "other"
+ * cpus. We make it global so it can be seen by gdb.
+ */
+volatile int in_kgdb_entry_log[MAX_NO_CPUS];
+volatile struct pt_regs *in_kgdb_here_log[MAX_NO_CPUS];
+/*
+static spinlock_t continuelocks[MAX_NO_CPUS];
+*/
+spinlock_t kgdb_spinlock = SPIN_LOCK_UNLOCKED;
+/* waiters on our spinlock plus us */
+static atomic_t spinlock_waiters = ATOMIC_INIT(1);
+static int spinlock_count = 0;
+static int spinlock_cpu = 0;
+/*
+ * Note we use nested spin locks to account for the case where a break
+ * point is encountered when calling a function by user direction from
+ * kgdb. Also there is the memory exception recursion to account for.
+ * Well, yes, but this lets other cpus thru too. Lets add a
+ * cpu id to the lock.
+ */
+#define KGDB_SPIN_LOCK(x) if (spinlock_count == 0 || \
+ spinlock_cpu != smp_processor_id()) {\
+ atomic_inc(&spinlock_waiters); \
+ while (! spin_trylock(x)) {\
+ in_kgdb(®s);\
+ }\
+ atomic_dec(&spinlock_waiters); \
+ spinlock_count = 1; \
+ spinlock_cpu = smp_processor_id(); \
+ }else{ \
+ spinlock_count++; \
+ }
+#define KGDB_SPIN_UNLOCK(x) if (--spinlock_count == 0) spin_unlock(x)
+#else
+unsigned kgdb_spinlock = 0;
+#define KGDB_SPIN_LOCK(x) --*x
+#define KGDB_SPIN_UNLOCK(x) ++*x
+#endif
+
+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 $<data>#<checksum> */
+static void
+getpacket(char *buffer)
+{
+ unsigned char checksum;
+ unsigned char xmitcsum;
+ int i;
+ int count;
+ char ch;
+
+ do {
+ /* wait around for the start character, ignore all other characters */
+ while ((ch = (get_debug_char() & 0x7f)) != '$') ;
+ checksum = 0;
+ xmitcsum = -1;
+
+ count = 0;
+
+ /* now, read until a # or end of buffer is found */
+ while (count < BUFMAX) {
+ ch = get_debug_char() & 0x7f;
+ if (ch == '#')
+ break;
+ checksum = checksum + ch;
+ buffer[count] = ch;
+ count = count + 1;
+ }
+ buffer[count] = 0;
+
+ if (ch == '#') {
+ xmitcsum = hex(get_debug_char() & 0x7f) << 4;
+ xmitcsum += hex(get_debug_char() & 0x7f);
+ if ((remote_debug) && (checksum != xmitcsum)) {
+ printk
+ ("bad checksum. My count = 0x%x, sent=0x%x. buf=%s\n",
+ checksum, xmitcsum, buffer);
+ }
+
+ if (checksum != xmitcsum)
+ put_debug_char('-'); /* failed checksum */
+ else {
+ put_debug_char('+'); /* successful transfer */
+ /* 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);
+
+ if (remote_debug)
+ printk("R:%s\n", buffer);
+ flush_debug_char();
+}
+
+/* send the packet in buffer. */
+
+static void
+putpacket(char *buffer)
+{
+ unsigned char checksum;
+ int count;
+ char ch;
+
+ /* $<packet info>#<checksum>. */
+
+ if (kgdb_eth == -1) {
+ do {
+ if (remote_debug)
+ printk("T:%s\n", buffer);
+ put_debug_char('$');
+ checksum = 0;
+ count = 0;
+
+ while ((ch = buffer[count])) {
+ put_debug_char(ch);
+ checksum += ch;
+ count += 1;
+ }
+
+ put_debug_char('#');
+ put_debug_char(hexchars[checksum >> 4]);
+ put_debug_char(hexchars[checksum % 16]);
+ flush_debug_char();
+
+ } while ((get_debug_char() & 0x7f) != '+');
+ } else {
+ /*
+ * For udp, we can not transfer too much bytes once.
+ * We only transfer MAX_SEND_COUNT size bytes each time
+ */
+
+#define MAX_SEND_COUNT 30
+
+ int send_count = 0, i = 0;
+ char send_buf[MAX_SEND_COUNT];
+
+ do {
+ if (remote_debug)
+ printk("T:%s\n", buffer);
+ put_debug_char('$');
+ checksum = 0;
+ count = 0;
+ send_count = 0;
+ while ((ch = buffer[count])) {
+ if (send_count >= MAX_SEND_COUNT) {
+ for(i = 0; i < MAX_SEND_COUNT; i++) {
+ put_debug_char(send_buf[i]);
+ }
+ flush_debug_char();
+ send_count = 0;
+ } else {
+ send_buf[send_count] = ch;
+ checksum += ch;
+ count ++;
+ send_count++;
+ }
+ }
+ for(i = 0; i < send_count; i++)
+ put_debug_char(send_buf[i]);
+ put_debug_char('#');
+ put_debug_char(hexchars[checksum >> 4]);
+ put_debug_char(hexchars[checksum % 16]);
+ flush_debug_char();
+ } while ((get_debug_char() & 0x7f) != '+');
+ }
+}
+
+static char remcomInBuffer[BUFMAX];
+static char remcomOutBuffer[BUFMAX];
+static short error;
+
+static void
+debug_error(char *format, char *parm)
+{
+ if (remote_debug)
+ printk(format, parm);
+}
+
+extern void scheduling_functions_start_here(void);
+extern void scheduling_functions_end_here(void);
+#define first_sched ((unsigned long) scheduling_functions_start_here)
+#define last_sched ((unsigned long) scheduling_functions_end_here)
+
+/* Indicate to caller of mem2hex or hex2mem that there has been an
+ error. */
+static volatile int mem_err = 0;
+static volatile int mem_err_expected = 0;
+static volatile int mem_err_cnt = 0;
+static int garbage_loc = -1;
+
+/* FIXME: WTF? */
+static int
+get_char(char *addr)
+{
+ return *addr;
+}
+
+static void set_char(char *addr, int val, int may_fault);
+
+/* convert the memory pointed to by mem into hex, placing result in buf */
+/* return a pointer to the last char put in buf (null) */
+/* If MAY_FAULT is non-zero, then we should set mem_err in response to
+ a fault; if zero treat a fault like any other fault in the stub. */
+static char *
+mem2hex(char *mem, char *buf, int count, int may_fault)
+{
+ int i;
+ unsigned char ch;
+
+ if (may_fault) {
+ mem_err_expected = 1;
+ mem_err = 0;
+ }
+ for (i = 0; i < count; i++) {
+ /* printk("%lx = ", mem) ; */
+
+ ch = get_char(mem++);
+
+ /* printk("%02x\n", ch & 0xFF) ; */
+ if (may_fault && mem_err) {
+ if (remote_debug)
+ printk("Mem fault fetching from addr %lx\n",
+ (long) (mem - 1));
+ *buf = 0; /* truncate buffer */
+ return (buf);
+ }
+ *buf++ = hexchars[ch >> 4];
+ *buf++ = hexchars[ch % 16];
+ }
+ *buf = 0;
+ if (may_fault)
+ mem_err_expected = 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 */
+/* NOTE: We use the may fault flag to also indicate if the write is to
+ * the registers (0) or "other" memory (!=0)
+ */
+static char *
+hex2mem(char *buf, char *mem, int count, int may_fault)
+{
+ int i;
+ unsigned char ch;
+
+ if (may_fault) {
+ mem_err_expected = 1;
+ mem_err = 0;
+ }
+ for (i = 0; i < count; i++) {
+ ch = hex(*buf++) << 4;
+ ch = ch + hex(*buf++);
+ set_char(mem++, ch, may_fault);
+
+ if (may_fault && mem_err) {
+ if (remote_debug)
+ printk("Mem fault storing to addr %lx\n",
+ (long) (mem - 1));
+ return (mem);
+ }
+ }
+ if (may_fault)
+ mem_err_expected = 0;
+ return (mem);
+}
+
+/*
+ * While we find nice hex chars, build an int
+ * return number of chars processed
+ */
+int
+hexToInt(char **ptr, int *intValue)
+{
+ int numChars = 0;
+ int hexValue;
+
+ *intValue = 0;
+
+ while (**ptr) {
+ hexValue = hex(**ptr);
+ if (hexValue >= 0) {
+ *intValue = (*intValue << 4) | hexValue;
+ numChars++;
+ } else
+ break;
+
+ (*ptr)++;
+ }
+
+ return (numChars);
+}
+
+#define stubhex(h) hex(h)
+#ifdef old_thread_list
+
+static int
+stub_unpack_int(char *buff, int fieldlength)
+{
+ int nibble;
+ int retval = 0;
+
+ while (fieldlength) {
+ nibble = stubhex(*buff++);
+ retval |= nibble;
+ fieldlength--;
+ if (fieldlength)
+ retval = retval << 4;
+ }
+ return retval;
+}
+#endif
+static char *
+pack_hex_byte(char *pkt, int byte)
+{
+ *pkt++ = hexchars[(byte >> 4) & 0xf];
+ *pkt++ = hexchars[(byte & 0xf)];
+ return pkt;
+}
+
+#define BUF_THREAD_ID_SIZE 16
+
+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;
+}
+
+#ifdef old_thread_list
+static char *
+unpack_byte(char *buf, int *value)
+{
+ *value = stub_unpack_int(buf, 2);
+ return buf + 2;
+}
+
+static char *
+unpack_threadid(char *inbuf, threadref * id)
+{
+ char *altref;
+ char *limit = inbuf + BUF_THREAD_ID_SIZE;
+ int x, y;
+
+ altref = (char *) id;
+
+ while (inbuf < limit) {
+ x = stubhex(*inbuf++);
+ y = stubhex(*inbuf++);
+ *altref++ = (x << 4) | y;
+ }
+ return inbuf;
+}
+#endif
+
+static void
+int_to_threadref(threadref * id, int value)
+{
+ unsigned char *scan;
+
+ 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);
+}
+
+static int
+int_to_hex_v(unsigned char * id, int value)
+{
+ unsigned char *start = id;
+ int shift;
+ int ch;
+
+ for (shift = 28; shift >= 0; shift -= 4) {
+ if ((ch = (value >> shift) & 0xf) || (id != start)) {
+ *id = hexchars[ch];
+ id++;
+ }
+ }
+ if (id == start)
+ *id++ = '0';
+ return id - start;
+}
+
+
+#ifdef old_thread_list
+static int
+threadref_to_int(threadref * ref)
+{
+ int i, value = 0;
+ unsigned char *scan;
+
+ scan = (char *) ref;
+ scan += 4;
+ i = 4;
+ while (i-- > 0)
+ value = (value << 8) | ((*scan++) & 0xff);
+ return value;
+}
+#endif
+
+/* FIXME: WTF?! */
+static int
+cmp_str(char *s1, char *s2, int count)
+{
+ while (count--) {
+ if (*s1++ != *s2++)
+ return 0;
+ }
+ return 1;
+}
+
+extern struct task_struct *kgdb_get_idle(int cpu);
+#define idle_task(cpu) kgdb_get_idle(cpu)
+
+extern int kgdb_pid_init_done;
+
+struct task_struct *
+getthread(int pid)
+{
+ struct task_struct *thread;
+ if (pid >= PID_MAX && pid <= (PID_MAX + MAX_NO_CPUS)) {
+
+ return idle_task(pid - PID_MAX);
+ } else {
+ /*
+ * find_task_by_pid is relatively safe all the time
+ * Other pid functions require lock downs which imply
+ * that we may be interrupting them (as we get here
+ * in the middle of most any lock down).
+ * Still we don't want to call until the table exists!
+ */
+ if (kgdb_pid_init_done) {
+ thread = find_task_by_pid(pid);
+ if (thread) {
+ return thread;
+ }
+ }
+ }
+ return NULL;
+}
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