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/*
* Performance event callchain support - SuperH architecture code
*
* Copyright (C) 2009 Paul Mundt
*
* 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.
*/
#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_warning(void *data, char *msg)
{
}
static void
callchain_warning_symbol(void *data, char *msg, unsigned long symbol)
{
}
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 *entry = data;
if (reliable)
perf_callchain_store(entry, addr);
}
static const struct stacktrace_ops callchain_ops = {
.warning = callchain_warning,
.warning_symbol = callchain_warning_symbol,
.stack = callchain_stack,
.address = callchain_address,
};
void
perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
perf_callchain_store(entry, regs->pc);
unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
}
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