1/*
 2 * Performance event callchain support - SuperH architecture code
 3 *
 4 * Copyright (C) 2009  Paul Mundt
 5 *
 6 * This file is subject to the terms and conditions of the GNU General Public
 7 * License.  See the file "COPYING" in the main directory of this archive
 8 * for more details.
 9 */
10#include <linux/kernel.h>
11#include <linux/sched.h>
12#include <linux/perf_event.h>
13#include <linux/percpu.h>
14#include <asm/unwinder.h>
15#include <asm/ptrace.h>
16
17static int callchain_stack(void *data, char *name)
18{
19	return 0;
20}
21
22static void callchain_address(void *data, unsigned long addr, int reliable)
23{
24	struct perf_callchain_entry *entry = data;
25
26	if (reliable)
27		perf_callchain_store(entry, addr);
28}
29
30static const struct stacktrace_ops callchain_ops = {
31	.stack		= callchain_stack,
32	.address	= callchain_address,
33};
34
35void
36perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
37{
38	perf_callchain_store(entry, regs->pc);
39
40	unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
41}

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Performance event callchain support - SuperH architecture code
 4 *
 5 * Copyright (C) 2009  Paul Mundt
 
 
 
 
 6 */
 7#include <linux/kernel.h>
 8#include <linux/sched.h>
 9#include <linux/perf_event.h>
10#include <linux/percpu.h>
11#include <asm/unwinder.h>
12#include <asm/ptrace.h>
13
 
 
 
 
 
14static void callchain_address(void *data, unsigned long addr, int reliable)
15{
16	struct perf_callchain_entry_ctx *entry = data;
17
18	if (reliable)
19		perf_callchain_store(entry, addr);
20}
21
22static const struct stacktrace_ops callchain_ops = {
 
23	.address	= callchain_address,
24};
25
26void
27perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs)
28{
29	perf_callchain_store(entry, regs->pc);
30
31	unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
32}