2018-12-28 01:32:24 -07:00
|
|
|
// SPDX-License-Identifier: GPL-2.0
|
2009-11-05 00:20:09 -07:00
|
|
|
/*
|
|
|
|
* Performance event callchain support - SuperH architecture code
|
|
|
|
*
|
|
|
|
* Copyright (C) 2009 Paul Mundt
|
|
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/sched.h>
|
|
|
|
#include <linux/perf_event.h>
|
|
|
|
#include <linux/percpu.h>
|
|
|
|
#include <asm/unwinder.h>
|
|
|
|
#include <asm/ptrace.h>
|
|
|
|
|
|
|
|
static void callchain_address(void *data, unsigned long addr, int reliable)
|
|
|
|
{
|
2016-04-28 08:30:53 -07:00
|
|
|
struct perf_callchain_entry_ctx *entry = data;
|
2009-11-05 00:20:09 -07:00
|
|
|
|
|
|
|
if (reliable)
|
2010-06-29 10:34:05 -07:00
|
|
|
perf_callchain_store(entry, addr);
|
2009-11-05 00:20:09 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static const struct stacktrace_ops callchain_ops = {
|
|
|
|
.address = callchain_address,
|
|
|
|
};
|
|
|
|
|
2010-06-30 14:03:51 -07:00
|
|
|
void
|
2016-04-28 08:30:53 -07:00
|
|
|
perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs)
|
2009-11-05 00:20:09 -07:00
|
|
|
{
|
2010-06-29 10:34:05 -07:00
|
|
|
perf_callchain_store(entry, regs->pc);
|
2009-11-05 00:20:09 -07:00
|
|
|
|
|
|
|
unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
|
|
|
|
}
|