15b88319eSDaniel Borkmann // SPDX-License-Identifier: GPL-2.0 25b88319eSDaniel Borkmann #include "vmlinux.h" 35b88319eSDaniel Borkmann #include <bpf/bpf_helpers.h> 45b88319eSDaniel Borkmann 55b88319eSDaniel Borkmann /* 65b88319eSDaniel Borkmann * Minimal, map-less program. Driven through libbpf's gen_loader (gen_hash) 7*99b321ddSDaniel Borkmann * by prog_tests/signed_loader.c so the generated light-skeleton loader can be 8*99b321ddSDaniel Borkmann * exercised against good and tampered metadata, which the kernel now verifies 9*99b321ddSDaniel Borkmann * at load time via the insns||metadata signature. A socket filter needs no 10*99b321ddSDaniel Borkmann * load-time attach resolution, and having no maps keeps the generated loader's 11*99b321ddSDaniel Borkmann * ctx trivial (0 maps, 1 prog). 125b88319eSDaniel Borkmann */ 135b88319eSDaniel Borkmann SEC("socket") probe(void * ctx)145b88319eSDaniel Borkmannint probe(void *ctx) 155b88319eSDaniel Borkmann { 165b88319eSDaniel Borkmann return 0; 175b88319eSDaniel Borkmann } 185b88319eSDaniel Borkmann 195b88319eSDaniel Borkmann char _license[] SEC("license") = "GPL"; 20