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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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21
arch/arm/kernel/time.c
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@@ -33,6 +33,7 @@
#include <asm/leds.h>
#include <asm/thread_info.h>
#include <asm/stacktrace.h>
#include <asm/mach/time.h>
/*
@@ -55,14 +56,22 @@ EXPORT_SYMBOL(rtc_lock);
#ifdef CONFIG_SMP
unsigned long profile_pc(struct pt_regs *regs)
{
unsigned long fp, pc = instruction_pointer(regs);
struct stackframe frame;
if (in_lock_functions(pc)) {
fp = regs->ARM_fp;
pc = ((unsigned long *)fp)[-1];
}
if (!in_lock_functions(regs->ARM_pc))
return regs->ARM_pc;
return pc;
frame.fp = regs->ARM_fp;
frame.sp = regs->ARM_sp;
frame.lr = regs->ARM_lr;
frame.pc = regs->ARM_pc;
do {
int ret = unwind_frame(&frame);
if (ret < 0)
return 0;
} while (in_lock_functions(frame.pc));
return frame.pc;
}
EXPORT_SYMBOL(profile_pc);
#endif