Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
os
linux
1/*
2 * arch/sh/kernel/stacktrace.c
3 *
4 * Stack trace management functions
5 *
6 * Copyright (C) 2006 - 2008 Paul Mundt
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>
15#include <linux/module.h>
16#include <asm/ptrace.h>
17
18/*
19 * Save stack-backtrace addresses into a stack_trace buffer.
20 */
21void save_stack_trace(struct stack_trace *trace)
22{
23 unsigned long *sp = (unsigned long *)current_stack_pointer;
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}
38EXPORT_SYMBOL_GPL(save_stack_trace);
39
40void 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}
59EXPORT_SYMBOL_GPL(save_stack_trace_tsk);