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powerpc: add definition for pt_regs offset within an interrupt frame

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This is a common offset that currently uses the overloaded
STACK_FRAME_OVERHEAD constant. It's easier to read and more
flexible to use a specific regs offset for this.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221127124942.1665522-8-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin
2022-11-27 22:49:32 +10:00
committed by Michael Ellerman
parent 37195b820d
commit c03be0a3f3
18 changed files with 100 additions and 100 deletions
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arch/powerpc/xmon/xmon.c
+3 -4
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@@ -1782,14 +1782,13 @@ static void xmon_show_stack(unsigned long sp, unsigned long lr,
xmon_print_symbol(ip, " ", "\n");
}
/* Look for "regshere" marker to see if this is
/* Look for "regs" marker to see if this is
an exception frame. */
if (mread(sp + MARKER_OFFSET, &marker, sizeof(unsigned long))
&& marker == STACK_FRAME_REGS_MARKER) {
if (mread(sp + STACK_FRAME_OVERHEAD, &regs, sizeof(regs))
!= sizeof(regs)) {
if (mread(sp + STACK_INT_FRAME_REGS, &regs, sizeof(regs)) != sizeof(regs)) {
printf("Couldn't read registers at %lx\n",
sp + STACK_FRAME_OVERHEAD);
sp + STACK_INT_FRAME_REGS);
break;
}
printf("--- Exception: %lx %s at ", regs.trap,