1 // SPDX-License-Identifier: GPL-2.0 2 #include "vmlinux.h" 3 #include <bpf/bpf_helpers.h> 4 5 /* 6 * Minimal, map-less program. Driven through libbpf's gen_loader (gen_hash) 7 * by prog_tests/signed_loader.c so the generated light-skeleton loader (with 8 * the emit_signature_match metadata check) can be exercised against good 9 * and tampered metadata. A socket filter needs no load-time attach resolution, 10 * and having no maps keeps the generated loader's ctx trivial (0 maps, 1 prog). 11 */ 12 SEC("socket") 13 int probe(void *ctx) 14 { 15 return 0; 16 } 17 18 char _license[] SEC("license") = "GPL"; 19