39 lines
859 B
C
39 lines
859 B
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* 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 int callchain_stack(void *data, char *name)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void callchain_address(void *data, unsigned long addr, int reliable)
|
||
|
|
{
|
||
|
|
struct perf_callchain_entry_ctx *entry = data;
|
||
|
|
|
||
|
|
if (reliable)
|
||
|
|
perf_callchain_store(entry, addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct stacktrace_ops callchain_ops = {
|
||
|
|
.stack = callchain_stack,
|
||
|
|
.address = callchain_address,
|
||
|
|
};
|
||
|
|
|
||
|
|
void
|
||
|
|
perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
perf_callchain_store(entry, regs->pc);
|
||
|
|
|
||
|
|
unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
|
||
|
|
}
|