]>
Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
85718fae TL |
2 | /* |
3 | * arch/ia64/kernel/stacktrace.c | |
4 | * | |
5 | * Stack trace management functions | |
6 | * | |
7 | */ | |
8 | #include <linux/sched.h> | |
9 | #include <linux/stacktrace.h> | |
10 | #include <linux/module.h> | |
11 | ||
12 | static void | |
13 | ia64_do_save_stack(struct unw_frame_info *info, void *arg) | |
14 | { | |
15 | struct stack_trace *trace = arg; | |
16 | unsigned long ip; | |
17 | int skip = trace->skip; | |
18 | ||
19 | trace->nr_entries = 0; | |
20 | do { | |
21 | unw_get_ip(info, &ip); | |
22 | if (ip == 0) | |
23 | break; | |
24 | if (skip == 0) { | |
25 | trace->entries[trace->nr_entries++] = ip; | |
26 | if (trace->nr_entries == trace->max_entries) | |
27 | break; | |
28 | } else | |
29 | skip--; | |
30 | } while (unw_unwind(info) >= 0); | |
31 | } | |
32 | ||
33 | /* | |
34 | * Save stack-backtrace addresses into a stack_trace buffer. | |
35 | */ | |
36 | void save_stack_trace(struct stack_trace *trace) | |
37 | { | |
38 | unw_init_running(ia64_do_save_stack, trace); | |
39 | } | |
40 | EXPORT_SYMBOL(save_stack_trace); |