2002-04-20 19:04:09 +02:00
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/* Memory breakpoint operations for the remote server for GDB.
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2007-01-09 18:59:20 +01:00
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Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc.
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2002-04-20 19:04:09 +02:00
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Contributed by MontaVista Software.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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2005-12-23 19:11:55 +01:00
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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2002-04-20 19:04:09 +02:00
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#include "server.h"
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* acconfig.h: Remove.
* configure.ac: Add a test for socklen_t. Use three-argument
AC_DEFINE throughout.
* config.in: Regenerated using autoheader 2.59.
* configure: Regenerated.
* gdbreplay.c (socklen_t): Provide a default.
(remote_open): Use socklen_t.
* remote-utils.c (socklen_t): Provide a default.
(remote_open): Use socklen_t.
(convert_int_to_ascii, convert_ascii_to_int, decode_M_packet): Use
unsigned char.
* i387-fp.c (struct i387_fsave, struct i387_fxsave): Use unsigned
char for buffers.
* linux-low.c (linux_read_memory, linux_write_memory)
(linux_read_auxv): Likewise.
* mem-break.c (breakpoint_data, set_breakpoint_data, check_mem_read)
(check_mem_write): Likewise.
* mem-break.h (set_breakpoint_data, check_mem_read, check_mem_write):
Likewise.
* regcache.c (struct inferior_rgcache_data, registers_to_string)
(registers_from_string, register_data): Likewise.
* server.c (handle_query, main): Likewise.
* server.h (convert_ascii_to_int, convert_int_to_ascii)
(decode_M_packet): Likewise.
* target.c (read_inferior_memory, write_inferior_memory): Likewise.
* target.h (struct target_ops): Update read_memory, write_memory,
and read_auxv.
(read_inferior_memory, write_inferior_memory): Update.
* linux-low.h (struct linux_target_ops): Change type of breakpoint
to unsigned char *.
* linux-arm-low.c, linux-cris-low.c, linux-crisv32-low.c,
linux-i386-low.c, linux-m32r-low.c, linux-m68k-low.c,
linux-mips-low.c, linux-ppc-low.c, linux-ppc64-low.c,
linux-s390-low.c, linux-sh-low.c: Update for changes in
read_inferior_memory and the_low_target->breakpoint.
2005-06-13 03:59:22 +02:00
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const unsigned char *breakpoint_data;
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2002-04-20 19:04:09 +02:00
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int breakpoint_len;
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#define MAX_BREAKPOINT_LEN 8
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struct breakpoint
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{
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struct breakpoint *next;
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CORE_ADDR pc;
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unsigned char old_data[MAX_BREAKPOINT_LEN];
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/* Non-zero iff we are stepping over this breakpoint. */
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int reinserting;
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/* Non-NULL iff this breakpoint was inserted to step over
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another one. Points to the other breakpoint (which is also
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in the *next chain somewhere). */
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struct breakpoint *breakpoint_to_reinsert;
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/* Function to call when we hit this breakpoint. */
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void (*handler) (CORE_ADDR);
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};
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struct breakpoint *breakpoints;
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void
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set_breakpoint_at (CORE_ADDR where, void (*handler) (CORE_ADDR))
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{
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struct breakpoint *bp;
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if (breakpoint_data == NULL)
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error ("Target does not support breakpoints.");
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bp = malloc (sizeof (struct breakpoint));
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memset (bp, 0, sizeof (struct breakpoint));
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(*the_target->read_memory) (where, bp->old_data,
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breakpoint_len);
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(*the_target->write_memory) (where, breakpoint_data,
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breakpoint_len);
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bp->pc = where;
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bp->handler = handler;
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bp->next = breakpoints;
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breakpoints = bp;
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}
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static void
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delete_breakpoint (struct breakpoint *bp)
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{
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struct breakpoint *cur;
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if (breakpoints == bp)
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{
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breakpoints = bp->next;
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(*the_target->write_memory) (bp->pc, bp->old_data,
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breakpoint_len);
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free (bp);
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return;
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}
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cur = breakpoints;
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while (cur->next)
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{
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if (cur->next == bp)
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{
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cur->next = bp->next;
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(*the_target->write_memory) (bp->pc, bp->old_data,
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breakpoint_len);
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free (bp);
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return;
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}
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}
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warning ("Could not find breakpoint in list.");
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}
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static struct breakpoint *
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find_breakpoint_at (CORE_ADDR where)
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{
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struct breakpoint *bp = breakpoints;
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while (bp != NULL)
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{
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if (bp->pc == where)
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return bp;
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bp = bp->next;
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}
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return NULL;
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}
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static void
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reinsert_breakpoint_handler (CORE_ADDR stop_pc)
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{
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struct breakpoint *stop_bp, *orig_bp;
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stop_bp = find_breakpoint_at (stop_pc);
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if (stop_bp == NULL)
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error ("lost the stopping breakpoint.");
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orig_bp = stop_bp->breakpoint_to_reinsert;
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if (orig_bp == NULL)
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error ("no breakpoint to reinsert");
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(*the_target->write_memory) (orig_bp->pc, breakpoint_data,
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breakpoint_len);
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orig_bp->reinserting = 0;
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delete_breakpoint (stop_bp);
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}
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void
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reinsert_breakpoint_by_bp (CORE_ADDR stop_pc, CORE_ADDR stop_at)
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{
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struct breakpoint *bp, *orig_bp;
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set_breakpoint_at (stop_at, reinsert_breakpoint_handler);
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2002-05-15 05:36:13 +02:00
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orig_bp = find_breakpoint_at (stop_pc);
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2002-04-20 19:04:09 +02:00
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if (orig_bp == NULL)
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error ("Could not find original breakpoint in list.");
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bp = find_breakpoint_at (stop_at);
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if (bp == NULL)
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error ("Could not find breakpoint in list (reinserting by breakpoint).");
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bp->breakpoint_to_reinsert = orig_bp;
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(*the_target->write_memory) (orig_bp->pc, orig_bp->old_data,
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breakpoint_len);
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orig_bp->reinserting = 1;
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}
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void
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uninsert_breakpoint (CORE_ADDR stopped_at)
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{
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struct breakpoint *bp;
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bp = find_breakpoint_at (stopped_at);
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if (bp == NULL)
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error ("Could not find breakpoint in list (uninserting).");
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(*the_target->write_memory) (bp->pc, bp->old_data,
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breakpoint_len);
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bp->reinserting = 1;
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}
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void
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reinsert_breakpoint (CORE_ADDR stopped_at)
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{
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struct breakpoint *bp;
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bp = find_breakpoint_at (stopped_at);
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if (bp == NULL)
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error ("Could not find breakpoint in list (uninserting).");
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if (! bp->reinserting)
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error ("Breakpoint already inserted at reinsert time.");
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(*the_target->write_memory) (bp->pc, breakpoint_data,
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breakpoint_len);
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bp->reinserting = 0;
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}
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int
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check_breakpoints (CORE_ADDR stop_pc)
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{
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struct breakpoint *bp;
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bp = find_breakpoint_at (stop_pc);
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if (bp == NULL)
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return 0;
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if (bp->reinserting)
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{
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warning ("Hit a removed breakpoint?");
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return 0;
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}
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(*bp->handler) (bp->pc);
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return 1;
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}
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void
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* acconfig.h: Remove.
* configure.ac: Add a test for socklen_t. Use three-argument
AC_DEFINE throughout.
* config.in: Regenerated using autoheader 2.59.
* configure: Regenerated.
* gdbreplay.c (socklen_t): Provide a default.
(remote_open): Use socklen_t.
* remote-utils.c (socklen_t): Provide a default.
(remote_open): Use socklen_t.
(convert_int_to_ascii, convert_ascii_to_int, decode_M_packet): Use
unsigned char.
* i387-fp.c (struct i387_fsave, struct i387_fxsave): Use unsigned
char for buffers.
* linux-low.c (linux_read_memory, linux_write_memory)
(linux_read_auxv): Likewise.
* mem-break.c (breakpoint_data, set_breakpoint_data, check_mem_read)
(check_mem_write): Likewise.
* mem-break.h (set_breakpoint_data, check_mem_read, check_mem_write):
Likewise.
* regcache.c (struct inferior_rgcache_data, registers_to_string)
(registers_from_string, register_data): Likewise.
* server.c (handle_query, main): Likewise.
* server.h (convert_ascii_to_int, convert_int_to_ascii)
(decode_M_packet): Likewise.
* target.c (read_inferior_memory, write_inferior_memory): Likewise.
* target.h (struct target_ops): Update read_memory, write_memory,
and read_auxv.
(read_inferior_memory, write_inferior_memory): Update.
* linux-low.h (struct linux_target_ops): Change type of breakpoint
to unsigned char *.
* linux-arm-low.c, linux-cris-low.c, linux-crisv32-low.c,
linux-i386-low.c, linux-m32r-low.c, linux-m68k-low.c,
linux-mips-low.c, linux-ppc-low.c, linux-ppc64-low.c,
linux-s390-low.c, linux-sh-low.c: Update for changes in
read_inferior_memory and the_low_target->breakpoint.
2005-06-13 03:59:22 +02:00
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set_breakpoint_data (const unsigned char *bp_data, int bp_len)
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2002-04-20 19:04:09 +02:00
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{
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breakpoint_data = bp_data;
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breakpoint_len = bp_len;
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}
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void
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* acconfig.h: Remove.
* configure.ac: Add a test for socklen_t. Use three-argument
AC_DEFINE throughout.
* config.in: Regenerated using autoheader 2.59.
* configure: Regenerated.
* gdbreplay.c (socklen_t): Provide a default.
(remote_open): Use socklen_t.
* remote-utils.c (socklen_t): Provide a default.
(remote_open): Use socklen_t.
(convert_int_to_ascii, convert_ascii_to_int, decode_M_packet): Use
unsigned char.
* i387-fp.c (struct i387_fsave, struct i387_fxsave): Use unsigned
char for buffers.
* linux-low.c (linux_read_memory, linux_write_memory)
(linux_read_auxv): Likewise.
* mem-break.c (breakpoint_data, set_breakpoint_data, check_mem_read)
(check_mem_write): Likewise.
* mem-break.h (set_breakpoint_data, check_mem_read, check_mem_write):
Likewise.
* regcache.c (struct inferior_rgcache_data, registers_to_string)
(registers_from_string, register_data): Likewise.
* server.c (handle_query, main): Likewise.
* server.h (convert_ascii_to_int, convert_int_to_ascii)
(decode_M_packet): Likewise.
* target.c (read_inferior_memory, write_inferior_memory): Likewise.
* target.h (struct target_ops): Update read_memory, write_memory,
and read_auxv.
(read_inferior_memory, write_inferior_memory): Update.
* linux-low.h (struct linux_target_ops): Change type of breakpoint
to unsigned char *.
* linux-arm-low.c, linux-cris-low.c, linux-crisv32-low.c,
linux-i386-low.c, linux-m32r-low.c, linux-m68k-low.c,
linux-mips-low.c, linux-ppc-low.c, linux-ppc64-low.c,
linux-s390-low.c, linux-sh-low.c: Update for changes in
read_inferior_memory and the_low_target->breakpoint.
2005-06-13 03:59:22 +02:00
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check_mem_read (CORE_ADDR mem_addr, unsigned char *buf, int mem_len)
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2002-04-20 19:04:09 +02:00
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{
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struct breakpoint *bp = breakpoints;
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CORE_ADDR mem_end = mem_addr + mem_len;
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for (; bp != NULL; bp = bp->next)
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{
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CORE_ADDR bp_end = bp->pc + breakpoint_len;
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CORE_ADDR start, end;
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int copy_offset, copy_len, buf_offset;
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if (mem_addr >= bp_end)
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continue;
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if (bp->pc >= mem_end)
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continue;
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start = bp->pc;
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if (mem_addr > start)
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start = mem_addr;
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end = bp_end;
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if (end > mem_end)
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end = mem_end;
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copy_len = end - start;
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copy_offset = start - bp->pc;
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buf_offset = start - mem_addr;
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memcpy (buf + buf_offset, bp->old_data + copy_offset, copy_len);
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}
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}
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void
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* acconfig.h: Remove.
* configure.ac: Add a test for socklen_t. Use three-argument
AC_DEFINE throughout.
* config.in: Regenerated using autoheader 2.59.
* configure: Regenerated.
* gdbreplay.c (socklen_t): Provide a default.
(remote_open): Use socklen_t.
* remote-utils.c (socklen_t): Provide a default.
(remote_open): Use socklen_t.
(convert_int_to_ascii, convert_ascii_to_int, decode_M_packet): Use
unsigned char.
* i387-fp.c (struct i387_fsave, struct i387_fxsave): Use unsigned
char for buffers.
* linux-low.c (linux_read_memory, linux_write_memory)
(linux_read_auxv): Likewise.
* mem-break.c (breakpoint_data, set_breakpoint_data, check_mem_read)
(check_mem_write): Likewise.
* mem-break.h (set_breakpoint_data, check_mem_read, check_mem_write):
Likewise.
* regcache.c (struct inferior_rgcache_data, registers_to_string)
(registers_from_string, register_data): Likewise.
* server.c (handle_query, main): Likewise.
* server.h (convert_ascii_to_int, convert_int_to_ascii)
(decode_M_packet): Likewise.
* target.c (read_inferior_memory, write_inferior_memory): Likewise.
* target.h (struct target_ops): Update read_memory, write_memory,
and read_auxv.
(read_inferior_memory, write_inferior_memory): Update.
* linux-low.h (struct linux_target_ops): Change type of breakpoint
to unsigned char *.
* linux-arm-low.c, linux-cris-low.c, linux-crisv32-low.c,
linux-i386-low.c, linux-m32r-low.c, linux-m68k-low.c,
linux-mips-low.c, linux-ppc-low.c, linux-ppc64-low.c,
linux-s390-low.c, linux-sh-low.c: Update for changes in
read_inferior_memory and the_low_target->breakpoint.
2005-06-13 03:59:22 +02:00
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check_mem_write (CORE_ADDR mem_addr, unsigned char *buf, int mem_len)
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2002-04-20 19:04:09 +02:00
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{
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struct breakpoint *bp = breakpoints;
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CORE_ADDR mem_end = mem_addr + mem_len;
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for (; bp != NULL; bp = bp->next)
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{
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CORE_ADDR bp_end = bp->pc + breakpoint_len;
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CORE_ADDR start, end;
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int copy_offset, copy_len, buf_offset;
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if (mem_addr >= bp_end)
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continue;
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if (bp->pc >= mem_end)
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continue;
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start = bp->pc;
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if (mem_addr > start)
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start = mem_addr;
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end = bp_end;
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if (end > mem_end)
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end = mem_end;
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copy_len = end - start;
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copy_offset = start - bp->pc;
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buf_offset = start - mem_addr;
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memcpy (bp->old_data + copy_offset, buf + buf_offset, copy_len);
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if (bp->reinserting == 0)
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|
memcpy (buf + buf_offset, breakpoint_data + copy_offset, copy_len);
|
|
|
|
}
|
|
|
|
}
|