7d9884b927
* param-no-tm.h: Change users to define TM_FILE_OVERRIDE instead. * param.h, param-no-tm.h: Removed. * Update copyrights in all changed files. * dbxread.c, dwarfread.c, inflow.c, infrun.c, m2-exp.y, putenv.c, solib.c, symtab.h, tm-umax.h, valprint.c: Lint. * tm-convex.h, tm-hp300hpux.h, tm-merlin.h, tm-sparc.h, xm-merlin.h: Avoid host include files in target descriptions. * getpagesize.h: Removed, libiberty copes now.
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
/* Simulate breakpoints by patching locations in the target system, for GDB.
|
|
Copyright 1990, 1991 Free Software Foundation, Inc.
|
|
Contributed by Cygnus Support. Written by John Gilmore.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
#include "defs.h"
|
|
|
|
#ifdef BREAKPOINT
|
|
/* This file is only useful if BREAKPOINT is set. If not, we punt. */
|
|
|
|
#include <stdio.h>
|
|
#include "breakpoint.h"
|
|
#include "inferior.h"
|
|
#include "target.h"
|
|
|
|
/* This is the sequence of bytes we insert for a breakpoint. On some
|
|
machines, breakpoints are handled by the target environment and we
|
|
don't have to worry about them here. */
|
|
|
|
static char break_insn[] = BREAKPOINT;
|
|
|
|
/* This is only to check that BREAKPOINT fits in BREAKPOINT_MAX bytes. */
|
|
|
|
static char check_break_insn_size[BREAKPOINT_MAX] = BREAKPOINT;
|
|
|
|
/* Insert a breakpoint on machines that don't have any better breakpoint
|
|
support. We read the contents of the target location and stash it,
|
|
then overwrite it with a breakpoint instruction. ADDR is the target
|
|
location in the target machine. CONTENTS_CACHE is a pointer to
|
|
memory allocated for saving the target contents. It is guaranteed
|
|
by the caller to be long enough to save sizeof BREAKPOINT bytes.
|
|
FIXME: This size is target_arch dependent and should be available in
|
|
the target_arch transfer vector, if we ever have one... */
|
|
|
|
int
|
|
memory_insert_breakpoint (addr, contents_cache)
|
|
CORE_ADDR addr;
|
|
char *contents_cache;
|
|
{
|
|
int val;
|
|
|
|
val = target_read_memory (addr, contents_cache, sizeof break_insn);
|
|
|
|
if (val == 0)
|
|
val = target_write_memory (addr, break_insn, sizeof break_insn);
|
|
|
|
return val;
|
|
}
|
|
|
|
|
|
int
|
|
memory_remove_breakpoint (addr, contents_cache)
|
|
CORE_ADDR addr;
|
|
char *contents_cache;
|
|
{
|
|
return target_write_memory (addr, contents_cache, sizeof break_insn);
|
|
}
|
|
|
|
|
|
int memory_breakpoint_size = sizeof (break_insn);
|
|
|
|
|
|
#else /* BREAKPOINT */
|
|
|
|
char nogo[] = "Breakpoints not implemented for this target.";
|
|
|
|
int
|
|
memory_insert_breakpoint (addr, contents_cache)
|
|
CORE_ADDR addr;
|
|
char *contents_cache;
|
|
{
|
|
error (nogo);
|
|
return 0; /* lint */
|
|
}
|
|
|
|
int
|
|
memory_remove_breakpoint (addr, contents_cache)
|
|
CORE_ADDR addr;
|
|
char *contents_cache;
|
|
{
|
|
error (nogo);
|
|
return 0; /* lint */
|
|
}
|
|
|
|
int memory_breakpoint_size = -1;
|
|
|
|
#endif /* BREAKPOINT */
|