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authorJohn Gilmore <gnu@cygnus>1991-11-21 18:42:05 +0000
committerJohn Gilmore <gnu@cygnus>1991-11-21 18:42:05 +0000
commit7d9884b92772d5b4fa0de57de5caca2d9308c16c (patch)
tree061a8482b03bad9fd11d08bec0cc8e14ad99b839 /gdb/mem-break.c
parentd51bea8d2c6f8392d6a981c7293aee126e5914d5 (diff)
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* defs.h: Incorporate param.h. All users changed.
* 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.
Diffstat (limited to 'gdb/mem-break.c')
-rw-r--r--gdb/mem-break.c100
1 files changed, 12 insertions, 88 deletions
diff --git a/gdb/mem-break.c b/gdb/mem-break.c
index eebe7e2..7e55233 100644
--- a/gdb/mem-break.c
+++ b/gdb/mem-break.c
@@ -1,24 +1,24 @@
-/* Simulate breakpoints by patching locations in the target system.
- Copyright (C) 1990 Free Software Foundation, Inc.
+/* 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.
-GDB is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
-#include "param.h"
#ifdef BREAKPOINT
/* This file is only useful if BREAKPOINT is set. If not, we punt. */
@@ -72,86 +72,8 @@ memory_remove_breakpoint (addr, contents_cache)
}
-#if 0
-/* This should move back into breakpoint.c, sad to say. Encapsulate
- sizeof (BREAKPOINT) by export it as an int from mem-break.c. */
+int memory_breakpoint_size = sizeof (break_insn);
-/* Like target_read_memory() but if breakpoints are inserted, return
- the shadow contents instead of the breakpoints themselves. */
-int
-read_memory_nobpt (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- char *myaddr;
- unsigned len;
-{
- int status;
- struct breakpoint *b;
- ALL_BREAKPOINTS (b)
- {
- if (b->address == NULL || !b->inserted)
- continue;
- else if (b->address + sizeof (break_insn) <= memaddr)
- /* The breakpoint is entirely before the chunk of memory
- we are reading. */
- continue;
- else if (b->address >= memaddr + len)
- /* The breakpoint is entirely after the chunk of memory we
- are reading. */
- continue;
- else
- {
- /* Copy the breakpoint from the shadow contents, and recurse
- for the things before and after. */
-
- /* Addresses and length of the part of the breakpoint that
- we need to copy. */
- CORE_ADDR membpt = b->address;
- unsigned int bptlen = sizeof (break_insn);
- /* Offset within shadow_contents. */
- int bptoffset = 0;
-
- if (membpt < memaddr)
- {
- /* Only copy the second part of the breakpoint. */
- bptlen -= memaddr - membpt;
- bptoffset = memaddr - membpt;
- membpt = memaddr;
- }
-
- if (membpt + bptlen > memaddr + len)
- {
- /* Only copy the first part of the breakpoint. */
- bptlen -= (membpt + bptlen) - (memaddr + len);
- }
-
- bcopy (b->shadow_contents + bptoffset,
- myaddr + membpt - memaddr, bptlen);
-
- if (membpt > memaddr)
- {
- /* Copy the section of memory before the breakpoint. */
- status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr);
- if (status != 0)
- return status;
- }
-
- if (membpt + bptlen < memaddr + len)
- {
- /* Copy the section of memory after the breakpoint. */
- status = read_memory_nobpt
- (membpt + bptlen,
- myaddr + membpt + bptlen - memaddr,
- memaddr + len - (membpt + bptlen));
- if (status != 0)
- return status;
- }
- return 0;
- }
- }
- /* Nothing overlaps. Just call read_memory_noerr. */
- return target_read_memory (memaddr, myaddr, len);
-}
-#endif /* 0 */
#else /* BREAKPOINT */
@@ -175,4 +97,6 @@ memory_remove_breakpoint (addr, contents_cache)
return 0; /* lint */
}
+int memory_breakpoint_size = -1;
+
#endif /* BREAKPOINT */