fentry_recursive_target.c

 1// SPDX-License-Identifier: GPL-2.0
 2/* Copyright (c) 2023 Red Hat, Inc. */
 3#include <linux/bpf.h>
 4#include <bpf/bpf_helpers.h>
 5#include <bpf/bpf_tracing.h>
 6
 7char _license[] SEC("license") = "GPL";
 8
 9/* Dummy fentry bpf prog for testing fentry attachment chains. It's going to be
10 * a start of the chain.
11 */
12SEC("fentry/bpf_testmod_fentry_test1")
13int BPF_PROG(test1, int a)
14{
15	return 0;
16}
17
18/* Dummy bpf prog for testing attach_btf presence when attaching an fentry
19 * program.
20 */
21SEC("raw_tp/sys_enter")
22int BPF_PROG(fentry_target, struct pt_regs *regs, long id)
23{
24	return 0;
25}