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powerpc/xmon: Use STACK_FRAME_OVERHEAD in xmon_show_stack()

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We use STACK_FRAME_OVERHEAD in the exception vectors to establish
the exception frame, so it should be good enough to use here.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Ellerman 2012-10-09 04:20:35 +00:00 committed by Benjamin Herrenschmidt
parent c5c5714d50
commit c4de38093e
1 changed files with 2 additions and 8 deletions
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10
arch/powerpc/xmon/xmon.c
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@ -1286,12 +1286,6 @@ static int xmon_depth_to_print = 64;
#define LRSAVE_OFFSET (STACK_FRAME_LR_SAVE * sizeof(unsigned long))
#define MARKER_OFFSET (STACK_FRAME_MARKER * sizeof(unsigned long))
#ifdef __powerpc64__
#define REGS_OFFSET 0x70
#else
#define REGS_OFFSET 16
#endif
static void xmon_show_stack(unsigned long sp, unsigned long lr,
unsigned long pc)
{
@ -1355,10 +1349,10 @@ static void xmon_show_stack(unsigned long sp, unsigned long lr,
an exception frame. */
if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long))
&& marker == STACK_FRAME_REGS_MARKER) {
if (mread(sp + REGS_OFFSET, &regs, sizeof(regs))
if (mread(sp + STACK_FRAME_OVERHEAD, &regs, sizeof(regs))
!= sizeof(regs)) {
printf("Couldn't read registers at %lx\n",
sp + REGS_OFFSET);
sp + STACK_FRAME_OVERHEAD);
break;
}
printf("--- Exception: %lx %s at ", regs.trap,