[deliverable/linux.git] / arch / xtensa / oprofile / backtrace.c

/**
 * @file backtrace.c
 *
 * @remark Copyright 2008 Tensilica Inc.
 * Copyright (C) 2015 Cadence Design Systems Inc.
 * @remark Read the file COPYING
 *
 */

#include <linux/oprofile.h>
#include <asm/ptrace.h>
#include <asm/stacktrace.h>

static int xtensa_backtrace_cb(struct stackframe *frame, void *data)
{
	oprofile_add_trace(frame->pc);
	return 0;
}

void xtensa_backtrace(struct pt_regs * const regs, unsigned int depth)
{
	if (user_mode(regs))
		xtensa_backtrace_user(regs, depth, xtensa_backtrace_cb, NULL);
	else
		xtensa_backtrace_kernel(regs, depth, xtensa_backtrace_cb,
					xtensa_backtrace_cb, NULL);
}
Commit	Line	Data
e6ffe17e	1	/**
	2	* @file backtrace.c
	3	*
	4	* @remark Copyright 2008 Tensilica Inc.
5fdf377d	5	* Copyright (C) 2015 Cadence Design Systems Inc.
e6ffe17e	6	* @remark Read the file COPYING
	7	*
	8	*/
	9
	10	#include <linux/oprofile.h>
e6ffe17e	11	#include <asm/ptrace.h>
5fdf377d	12	#include <asm/stacktrace.h>
e6ffe17e	13
5fdf377d	14	static int xtensa_backtrace_cb(struct stackframe frame, void data)
e6ffe17e	15	{
5fdf377d MF	16	oprofile_add_trace(frame->pc);
5fdf377d MF	17	return 0;
e6ffe17e	18	}
	19
	20	void xtensa_backtrace(struct pt_regs * const regs, unsigned int depth)
	21	{
	22	if (user_mode(regs))
5fdf377d	23	xtensa_backtrace_user(regs, depth, xtensa_backtrace_cb, NULL);
e6ffe17e	24	else
5fdf377d MF	25	xtensa_backtrace_kernel(regs, depth, xtensa_backtrace_cb,
5fdf377d MF	26	xtensa_backtrace_cb, NULL);
e6ffe17e	27	}