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[ARM] 5382/1: unwind: Reorganise the stacktrace support

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This patch changes the walk_stacktrace and its callers for easier
integration of stack unwinding. The arch/arm/kernel/stacktrace.h file is
also moved to arch/arm/include/asm/stacktrace.h.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Catalin Marinas
2009-02-11 13:07:53 +01:00
committed by Russell King
parent 67a94c23bb
commit 2d7c11bfc9
7 changed files with 109 additions and 59 deletions
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arch/arm/oprofile/backtrace.c
+8 -6
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@@ -18,15 +18,14 @@
#include <linux/mm.h>
#include <linux/uaccess.h>
#include <asm/ptrace.h>
#include "../kernel/stacktrace.h"
#include <asm/stacktrace.h>
static int report_trace(struct stackframe *frame, void *d)
{
unsigned int *depth = d;
if (*depth) {
oprofile_add_trace(frame->lr);
oprofile_add_trace(frame->pc);
(*depth)--;
}
@@ -70,9 +69,12 @@ void arm_backtrace(struct pt_regs * const regs, unsigned int depth)
struct frame_tail *tail = ((struct frame_tail *) regs->ARM_fp) - 1;
if (!user_mode(regs)) {
unsigned long base = ((unsigned long)regs) & ~(THREAD_SIZE - 1);
walk_stackframe(regs->ARM_fp, base, base + THREAD_SIZE,
report_trace, &depth);
struct stackframe frame;
frame.fp = regs->ARM_fp;
frame.sp = regs->ARM_sp;
frame.lr = regs->ARM_lr;
frame.pc = regs->ARM_pc;
walk_stackframe(&frame, report_trace, &depth);
return;
}