33 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <linux/bpf.h>3#include <bpf/bpf_helpers.h>4#include <bpf/bpf_tracing.h>5 6char _license[] SEC("license") = "GPL";7 8struct {9 __uint(type, BPF_MAP_TYPE_PROG_ARRAY);10 __uint(max_entries, 1);11 __uint(key_size, sizeof(__u32));12 __uint(value_size, sizeof(__u32));13} jmp_table SEC(".maps");14 15SEC("?fentry/bpf_fentry_test1")16int BPF_PROG(test, int a)17{18 bpf_tail_call_static(ctx, &jmp_table, 0);19 return 0;20}21 22SEC("fentry/bpf_fentry_test1")23int BPF_PROG(call1, int a)24{25 return 0;26}27 28SEC("fentry/bpf_fentry_test1")29int BPF_PROG(call2, int a)30{31 return 0;32}33