[deliverable/linux.git] / arch / xtensa / include / asm / stacktrace.h

/*
 * arch/xtensa/include/asm/stacktrace.h
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2001 - 2013 Tensilica Inc.
 */
#ifndef _XTENSA_STACKTRACE_H
#define _XTENSA_STACKTRACE_H

#include <linux/sched.h>

struct stackframe {
	unsigned long pc;
	unsigned long sp;
};

static __always_inline unsigned long *stack_pointer(struct task_struct *task)
{
	unsigned long *sp;

	if (!task || task == current)
		__asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp));
	else
		sp = (unsigned long *)task->thread.sp;

	return sp;
}

void walk_stackframe(unsigned long *sp,
		int (*fn)(struct stackframe *frame, void *data),
		void *data);

#endif /* _XTENSA_STACKTRACE_H */
Commit	Line	Data
3e4196a5 MF	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
	15	struct stackframe {
	16	unsigned long pc;
	17	unsigned long sp;
	18	};
	19
	20	static __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
	32	void walk_stackframe(unsigned long *sp,
	33	int (fn)(struct stackframe frame, void *data),
	34	void *data);
	35
	36	#endif /* _XTENSA_STACKTRACE_H */