1// SPDX-License-Identifier: GPL-2.0
 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
12static void
13ia64_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 */
36void save_stack_trace(struct stack_trace *trace)
37{
38	unw_init_running(ia64_do_save_stack, trace);
39}
40EXPORT_SYMBOL(save_stack_trace);

 1// SPDX-License-Identifier: GPL-2.0
 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
12static void
13ia64_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 */
36void save_stack_trace(struct stack_trace *trace)
37{
38	unw_init_running(ia64_do_save_stack, trace);
39}
40EXPORT_SYMBOL(save_stack_trace);