1/*
2 * arch/xtensa/include/asm/stacktrace.h
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License.  See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 2001 - 2013 Tensilica Inc.
9 */
10#ifndef _XTENSA_STACKTRACE_H
11#define _XTENSA_STACKTRACE_H
12
13#include <linux/sched.h>
14
15struct stackframe {
16	unsigned long pc;
17	unsigned long sp;
18};
19
20static __always_inline unsigned long *stack_pointer(struct task_struct *task)
21{
22	unsigned long *sp;
23
24	if (!task || task == current)
25		__asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp));
26	else
27		sp = (unsigned long *)task->thread.sp;
28
29	return sp;
30}
31
32void walk_stackframe(unsigned long *sp,
33		int (*fn)(struct stackframe *frame, void *data),
34		void *data);
35
36#endif /* _XTENSA_STACKTRACE_H */
37