Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6] / arch / sparc64 / kernel / stacktrace.c
1 #include <linux/sched.h>
2 #include <linux/stacktrace.h>
3 #include <linux/thread_info.h>
4 #include <asm/ptrace.h>
5
6 void save_stack_trace(struct stack_trace *trace, struct task_struct *task)
7 {
8         unsigned long ksp, fp, thread_base;
9         struct thread_info *tp;
10
11         if (!task)
12                 task = current;
13         tp = task_thread_info(task);
14         if (task == current) {
15                 flushw_all();
16                 __asm__ __volatile__(
17                         "mov    %%fp, %0"
18                         : "=r" (ksp)
19                 );
20         } else
21                 ksp = tp->ksp;
22
23         fp = ksp + STACK_BIAS;
24         thread_base = (unsigned long) tp;
25         do {
26                 struct reg_window *rw;
27
28                 /* Bogus frame pointer? */
29                 if (fp < (thread_base + sizeof(struct thread_info)) ||
30                     fp >= (thread_base + THREAD_SIZE))
31                         break;
32
33                 rw = (struct reg_window *) fp;
34                 if (trace->skip > 0)
35                         trace->skip--;
36                 else
37                         trace->entries[trace->nr_entries++] = rw->ins[7];
38
39                 fp = rw->ins[6] + STACK_BIAS;
40         } while (trace->nr_entries < trace->max_entries);
41 }