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afbfb52e PM |
1 | /* |
2 | * arch/sh/kernel/stacktrace.c | |
3 | * | |
4 | * Stack trace management functions | |
5 | * | |
6 | * Copyright (C) 2006 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 <asm/ptrace.h> | |
16 | ||
17 | /* | |
18 | * Save stack-backtrace addresses into a stack_trace buffer. | |
19 | */ | |
a3cf4ea8 | 20 | void save_stack_trace(struct stack_trace *trace) |
afbfb52e | 21 | { |
ab1b6f03 | 22 | unsigned long *sp = (unsigned long *)current_stack_pointer; |
afbfb52e PM |
23 | |
24 | while (!kstack_end(sp)) { | |
25 | unsigned long addr = *sp++; | |
26 | ||
27 | if (__kernel_text_address(addr)) { | |
28 | if (trace->skip > 0) | |
29 | trace->skip--; | |
30 | else | |
31 | trace->entries[trace->nr_entries++] = addr; | |
32 | if (trace->nr_entries >= trace->max_entries) | |
33 | break; | |
34 | } | |
35 | } | |
36 | } |