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

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