/* Simulate breakpoints by patching locations in the target system, for GDB.
- Copyright 1990, 1991, 1995 Free Software Foundation, Inc.
+
+ Copyright 1990, 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2000,
+ 2002 Free Software Foundation, Inc.
+
Contributed by Cygnus Support. Written by John Gilmore.
This file is part of GDB.
#include "defs.h"
-/* This file is only useful if BREAKPOINT is set. If not, we punt. */
+/* This file is only useful if BREAKPOINT_FROM_PC is set. If not, we
+ punt. */
#include "symtab.h"
#include "breakpoint.h"
#include "target.h"
-/* Use the program counter to determine the contents and size
- of a breakpoint instruction. If no target-dependent macro
- BREAKPOINT_FROM_PC has been defined to implement this function,
- assume that the breakpoint doesn't depend on the PC, and
- use the values of the BIG_BREAKPOINT and LITTLE_BREAKPOINT macros.
- Return a pointer to a string of bytes that encode a breakpoint
- instruction, stores the length of the string to *lenptr,
- and optionally adjust the pc to point to the correct memory location
- for inserting the breakpoint. */
-
-unsigned char *
-memory_breakpoint_from_pc (pcptr, lenptr)
- CORE_ADDR *pcptr;
- int *lenptr;
-{
- /* {BIG_,LITTLE_}BREAKPOINT 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. */
-#ifdef BIG_BREAKPOINT
- if (TARGET_BYTE_ORDER == BIG_ENDIAN)
- {
- static unsigned char big_break_insn[] = BIG_BREAKPOINT;
- *lenptr = sizeof (big_break_insn);
- return big_break_insn;
- }
-#endif
-#ifdef LITTLE_BREAKPOINT
- if (TARGET_BYTE_ORDER != BIG_ENDIAN)
- {
- static unsigned char little_break_insn[] = LITTLE_BREAKPOINT;
- *lenptr = sizeof (little_break_insn);
- return little_break_insn;
- }
-#endif
-#ifdef BREAKPOINT
- {
- static unsigned char break_insn[] = BREAKPOINT;
- *lenptr = sizeof (break_insn);
- return break_insn;
- }
-#endif
- *lenptr = 0;
- return NULL;
-}
-
-
/* Insert a breakpoint on targets 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
is accomplished via BREAKPOINT_MAX). */
int
-memory_insert_breakpoint (addr, contents_cache)
- CORE_ADDR addr;
- char *contents_cache;
+default_memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
{
int val;
- unsigned char *bp;
+ const unsigned char *bp;
int bplen;
/* Determine appropriate breakpoint contents and size for this address. */
int
-memory_remove_breakpoint (addr, contents_cache)
- CORE_ADDR addr;
- char *contents_cache;
+default_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
{
- unsigned char *bp;
+ const unsigned char *bp;
int bplen;
/* Determine appropriate breakpoint contents and size for this address. */
return target_write_memory (addr, contents_cache, bplen);
}
+
+
+int
+memory_insert_breakpoint (CORE_ADDR addr, char *contents_cache)
+{
+ return MEMORY_INSERT_BREAKPOINT(addr, contents_cache);
+}
+
+int
+memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache)
+{
+ return MEMORY_REMOVE_BREAKPOINT(addr, contents_cache);
+}