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* mips-tdep.c (mips_step_skips_delay), config/mips/tm-mips.h

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(STEP_SKIPS_DELAY): Added.
	* infrun.c (proceed) [STEP_SKIPS_DELAY]: Check for a breakpoint in
	the delay slot.
This commit is contained in:
Jim Kingdon
1994-03-01 00:15:07 +00:00
parent 5143c305dd
commit b5aff26825
4 changed files with 32 additions and 4 deletions
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18
gdb/mips-tdep.c
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@@ -32,9 +32,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "objfiles.h"
#include "gdbtypes.h"
#if 0
#include "opcode/mips.h"
#endif
#define VM_MIN_ADDRESS (unsigned)0x400000
@@ -921,8 +919,9 @@ mips_frame_num_args(fip)
return -1;
}
#if 0
/* Is this a branch with a delay slot? */
static int is_delayed PARAMS ((unsigned long));
static int
is_delayed (insn)
unsigned long insn;
@@ -937,7 +936,18 @@ is_delayed (insn)
| INSN_COND_BRANCH_DELAY
| INSN_COND_BRANCH_LIKELY)));
}
#endif
int
mips_step_skips_delay (pc)
CORE_ADDR pc;
{
char buf[4];
if (target_read_memory (pc, buf, 4) != 0)
/* If error reading memory, guess that it is not a delayed branch. */
return 0;
return is_delayed (extract_unsigned_integer (buf, 4));
}
/* To skip prologues, I use this predicate. Returns either PC itself
if the code at PC does not look like a function prologue; otherwise