Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[linux-2.6.git] / arch / ia64 / kernel / stacktrace.c
1 /*
2  * arch/ia64/kernel/stacktrace.c
3  *
4  * Stack trace management functions
5  *
6  */
7 #include <linux/sched.h>
8 #include <linux/stacktrace.h>
9 #include <linux/module.h>
10
11 static void
12 ia64_do_save_stack(struct unw_frame_info *info, void *arg)
13 {
14         struct stack_trace *trace = arg;
15         unsigned long ip;
16         int skip = trace->skip;
17
18         trace->nr_entries = 0;
19         do {
20                 unw_get_ip(info, &ip);
21                 if (ip == 0)
22                         break;
23                 if (skip == 0) {
24                         trace->entries[trace->nr_entries++] = ip;
25                         if (trace->nr_entries == trace->max_entries)
26                                 break;
27                 } else
28                         skip--;
29         } while (unw_unwind(info) >= 0);
30 }
31
32 /*
33  * Save stack-backtrace addresses into a stack_trace buffer.
34  */
35 void save_stack_trace(struct stack_trace *trace)
36 {
37         unw_init_running(ia64_do_save_stack, trace);
38 }
39 EXPORT_SYMBOL(save_stack_trace);