]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/avr32/kernel/stacktrace.c
2 * Stack trace management functions
4 * Copyright (C) 2007 Atmel Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 #include <linux/sched.h>
11 #include <linux/sched/task_stack.h>
12 #include <linux/stacktrace.h>
13 #include <linux/thread_info.h>
14 #include <linux/module.h>
16 register unsigned long current_frame_pointer
asm("r7");
24 * Save stack-backtrace addresses into a stack_trace buffer.
26 void save_stack_trace(struct stack_trace
*trace
)
28 unsigned long low
, high
;
30 struct stackframe
*frame
;
31 int skip
= trace
->skip
;
33 low
= (unsigned long)task_stack_page(current
);
34 high
= low
+ THREAD_SIZE
;
35 fp
= current_frame_pointer
;
37 while (fp
>= low
&& fp
<= (high
- 8)) {
38 frame
= (struct stackframe
*)fp
;
43 trace
->entries
[trace
->nr_entries
++] = frame
->lr
;
44 if (trace
->nr_entries
>= trace
->max_entries
)
49 * The next frame must be at a higher address than the
56 EXPORT_SYMBOL_GPL(save_stack_trace
);