Merge branch 'r8169-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/romieu...
[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 <linux/module.h>
5 #include <asm/ptrace.h>
6 #include <asm/stacktrace.h>
7
8 #include "kstack.h"
9
10 void save_stack_trace(struct stack_trace *trace)
11 {
12         struct thread_info *tp = task_thread_info(current);
13         unsigned long ksp, fp;
14
15         stack_trace_flush();
16
17         __asm__ __volatile__(
18                 "mov    %%fp, %0"
19                 : "=r" (ksp)
20         );
21
22         fp = ksp + STACK_BIAS;
23         do {
24                 struct sparc_stackf *sf;
25                 struct pt_regs *regs;
26                 unsigned long pc;
27
28                 if (!kstack_valid(tp, fp))
29                         break;
30
31                 sf = (struct sparc_stackf *) fp;
32                 regs = (struct pt_regs *) (sf + 1);
33
34                 if (kstack_is_trap_frame(tp, regs)) {
35                         if (!(regs->tstate & TSTATE_PRIV))
36                                 break;
37                         pc = regs->tpc;
38                         fp = regs->u_regs[UREG_I6] + STACK_BIAS;
39                 } else {
40                         pc = sf->callers_pc;
41                         fp = (unsigned long)sf->fp + STACK_BIAS;
42                 }
43
44                 if (trace->skip > 0)
45                         trace->skip--;
46                 else
47                         trace->entries[trace->nr_entries++] = pc;
48         } while (trace->nr_entries < trace->max_entries);
49 }
50 EXPORT_SYMBOL_GPL(save_stack_trace);