diff options
Diffstat (limited to 'arch/arm/kernel/stacktrace.c')
| -rw-r--r-- | arch/arm/kernel/stacktrace.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c index 77ef35efaa8..ae31deb2d06 100644 --- a/arch/arm/kernel/stacktrace.c +++ b/arch/arm/kernel/stacktrace.c @@ -1,3 +1,4 @@ +#include <linux/module.h> #include <linux/sched.h> #include <linux/stacktrace.h> @@ -12,7 +13,7 @@ int walk_stackframe(unsigned long fp, unsigned long low, unsigned long high, /* * Check current frame pointer is within bounds */ - if ((fp - 12) < low || fp + 4 >= high) + if (fp < (low + 12) || fp + 4 >= high) break; frame = (struct stackframe *)(fp - 12); @@ -30,6 +31,7 @@ int walk_stackframe(unsigned long fp, unsigned long low, unsigned long high, return 0; } +EXPORT_SYMBOL(walk_stackframe); #ifdef CONFIG_STACKTRACE struct stack_trace_data { @@ -52,21 +54,15 @@ static int save_trace(struct stackframe *frame, void *d) return trace->nr_entries >= trace->max_entries; } -void save_stack_trace(struct stack_trace *trace, struct task_struct *task) +void save_stack_trace(struct stack_trace *trace) { struct stack_trace_data data; unsigned long fp, base; data.trace = trace; data.skip = trace->skip; - - if (task) { - base = (unsigned long)task_stack_page(task); - fp = 0; /* FIXME */ - } else { - base = (unsigned long)task_stack_page(current); - asm("mov %0, fp" : "=r" (fp)); - } + base = (unsigned long)task_stack_page(current); + asm("mov %0, fp" : "=r" (fp)); walk_stackframe(fp, base, base + THREAD_SIZE, save_trace, &data); } |