Commit | Line | Data |
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afbfb52e PM |
1 | /* |
2 | * arch/sh/kernel/stacktrace.c | |
3 | * | |
4 | * Stack trace management functions | |
5 | * | |
5a89f1ad | 6 | * Copyright (C) 2006 - 2008 Paul Mundt |
afbfb52e PM |
7 | * |
8 | * This file is subject to the terms and conditions of the GNU General Public | |
9 | * License. See the file "COPYING" in the main directory of this archive | |
10 | * for more details. | |
11 | */ | |
12 | #include <linux/sched.h> | |
13 | #include <linux/stacktrace.h> | |
14 | #include <linux/thread_info.h> | |
8b95d917 | 15 | #include <linux/module.h> |
afbfb52e PM |
16 | #include <asm/ptrace.h> |
17 | ||
18 | /* | |
19 | * Save stack-backtrace addresses into a stack_trace buffer. | |
20 | */ | |
a3cf4ea8 | 21 | void save_stack_trace(struct stack_trace *trace) |
afbfb52e | 22 | { |
ab1b6f03 | 23 | unsigned long *sp = (unsigned long *)current_stack_pointer; |
afbfb52e PM |
24 | |
25 | while (!kstack_end(sp)) { | |
26 | unsigned long addr = *sp++; | |
27 | ||
28 | if (__kernel_text_address(addr)) { | |
29 | if (trace->skip > 0) | |
30 | trace->skip--; | |
31 | else | |
32 | trace->entries[trace->nr_entries++] = addr; | |
33 | if (trace->nr_entries >= trace->max_entries) | |
34 | break; | |
35 | } | |
36 | } | |
37 | } | |
7b4c9505 | 38 | EXPORT_SYMBOL_GPL(save_stack_trace); |
5a89f1ad PM |
39 | |
40 | void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) | |
41 | { | |
42 | unsigned long *sp = (unsigned long *)tsk->thread.sp; | |
43 | ||
44 | while (!kstack_end(sp)) { | |
45 | unsigned long addr = *sp++; | |
46 | ||
47 | if (__kernel_text_address(addr)) { | |
48 | if (in_sched_functions(addr)) | |
49 | break; | |
50 | if (trace->skip > 0) | |
51 | trace->skip--; | |
52 | else | |
53 | trace->entries[trace->nr_entries++] = addr; | |
54 | if (trace->nr_entries >= trace->max_entries) | |
55 | break; | |
56 | } | |
57 | } | |
58 | } | |
59 | EXPORT_SYMBOL_GPL(save_stack_trace_tsk); |