/* Simulate breakpoints by patching locations in the target system, for GDB.
- Copyright (C) 1990, 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2000, 2002,
- 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+ Copyright (C) 1990-1993, 1995, 1997-2000, 2002, 2007-2012 Free
+ Software Foundation, Inc.
Contributed by Cygnus Support. Written by John Gilmore.
#include "breakpoint.h"
#include "inferior.h"
#include "target.h"
+#include "gdb_string.h"
/* Insert a breakpoint on targets that don't have any better
{
int val;
const unsigned char *bp;
+ gdb_byte *readbuf;
/* Determine appropriate breakpoint contents and size for this address. */
bp = gdbarch_breakpoint_from_pc
if (bp == NULL)
error (_("Software breakpoints not implemented for this target."));
- /* Save the memory contents. */
+ /* Save the memory contents in the shadow_contents buffer and then
+ write the breakpoint instruction. */
bp_tgt->shadow_len = bp_tgt->placed_size;
- val = target_read_memory (bp_tgt->placed_address, bp_tgt->shadow_contents,
+ readbuf = alloca (bp_tgt->placed_size);
+ val = target_read_memory (bp_tgt->placed_address, readbuf,
bp_tgt->placed_size);
-
- /* Write the breakpoint. */
if (val == 0)
- val = target_write_raw_memory (bp_tgt->placed_address, bp,
- bp_tgt->placed_size);
+ {
+ memcpy (bp_tgt->shadow_contents, readbuf, bp_tgt->placed_size);
+ val = target_write_raw_memory (bp_tgt->placed_address, bp,
+ bp_tgt->placed_size);
+ }
return val;
}