mirror of
https://github.com/torvalds/linux.git
synced 2024-12-12 22:23:55 +00:00
42 lines
889 B
C
42 lines
889 B
C
|
#include <linux/sched.h>
|
||
|
|
#include <linux/stacktrace.h>
|
||
|
|
#include <linux/thread_info.h>
|
||
|
|
#include <asm/ptrace.h>
|
||
|
|
|
||
|
|
void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
|
||
|
|
{
|
||
|
|
unsigned long ksp, fp, thread_base;
|
||
|
|
struct thread_info *tp;
|
||
|
|
|
||
|
|
if (!task)
|
||
|
|
task = current;
|
||
|
|
tp = task_thread_info(task);
|
||
|
|
if (task == current) {
|
||
|
|
flushw_all();
|
||
|
|
__asm__ __volatile__(
|
||
|
|
"mov %%fp, %0"
|
||
|
|
: "=r" (ksp)
|
||
|
|
);
|
||
|
|
} else
|
||
|
|
ksp = tp->ksp;
|
||
|
|
|
||
|
|
fp = ksp + STACK_BIAS;
|
||
|
|
thread_base = (unsigned long) tp;
|
||
|
|
do {
|
||
|
|
struct reg_window *rw;
|
||
|
|
|
||
|
|
/* Bogus frame pointer? */
|
||
|
|
if (fp < (thread_base + sizeof(struct thread_info)) ||
|
||
|
|
fp >= (thread_base + THREAD_SIZE))
|
||
|
|
break;
|
||
|
|
|
||
|
|
rw = (struct reg_window *) fp;
|
||
|
|
if (trace->skip > 0)
|
||
|
|
trace->skip--;
|
||
|
|
else
|
||
|
|
trace->entries[trace->nr_entries++] = rw->ins[7];
|
||
|
|
|
||
|
|
fp = rw->ins[6] + STACK_BIAS;
|
||
|
|
} while (trace->nr_entries < trace->max_entries);
|
||
|
|
}
|