1 // SPDX-License-Identifier: GPL-2.0-only
3 * This code come from arch/arm64/kernel/return_address.c
5 * Copyright (C) 2023 SiFive.
8 #include <linux/export.h>
9 #include <linux/kprobes.h>
10 #include <linux/stacktrace.h>
12 struct return_address_data {
17 static bool save_return_addr(void *d, unsigned long pc)
19 struct return_address_data *data = d;
22 data->addr = (void *)pc;
30 NOKPROBE_SYMBOL(save_return_addr);
32 noinline void *return_address(unsigned int level)
34 struct return_address_data data;
36 data.level = level + 3;
39 arch_stack_walk(save_return_addr, &data, current, NULL);
47 EXPORT_SYMBOL_GPL(return_address);
48 NOKPROBE_SYMBOL(return_address);