[mirror_ubuntu-bionic-kernel.git] / arch / ia64 / kernel / stacktrace.c

// SPDX-License-Identifier: GPL-2.0
/*
 * arch/ia64/kernel/stacktrace.c
 *
 * Stack trace management functions
 *
 */
#include <linux/sched.h>
#include <linux/stacktrace.h>
#include <linux/module.h>

static void
ia64_do_save_stack(struct unw_frame_info *info, void *arg)
{
	struct stack_trace *trace = arg;
	unsigned long ip;
	int skip = trace->skip;

	trace->nr_entries = 0;
	do {
		unw_get_ip(info, &ip);
		if (ip == 0)
			break;
		if (skip == 0) {
			trace->entries[trace->nr_entries++] = ip;
			if (trace->nr_entries == trace->max_entries)
				break;
		} else
			skip--;
	} while (unw_unwind(info) >= 0);
}

/*
 * Save stack-backtrace addresses into a stack_trace buffer.
 */
void save_stack_trace(struct stack_trace *trace)
{
	unw_init_running(ia64_do_save_stack, trace);
}
EXPORT_SYMBOL(save_stack_trace);
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);