// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2026 Meta Platforms, Inc. and affiliates. */ #include <vmlinux.h> #include <bpf/bpf_helpers.h> #include "bpf_misc.h" extern int bpf_kfunc_implicit_arg(int a) __weak __ksym; extern int bpf_kfunc_implicit_arg_impl(int a, struct bpf_prog_aux *aux) __weak __ksym; /* illegal */ extern int bpf_kfunc_implicit_arg_legacy(int a, int b) __weak __ksym; extern int bpf_kfunc_implicit_arg_legacy_impl(int a, int b, struct bpf_prog_aux *aux) __weak __ksym; char _license[] SEC("license") = "GPL"; SEC("syscall") __retval(5) int test_kfunc_implicit_arg(void *ctx) { return bpf_kfunc_implicit_arg(5); } SEC("syscall") __failure __msg("cannot find address for kernel function bpf_kfunc_implicit_arg_impl") int test_kfunc_implicit_arg_impl_illegal(void *ctx) { return bpf_kfunc_implicit_arg_impl(5, NULL); } SEC("syscall") __retval(7) int test_kfunc_implicit_arg_legacy(void *ctx) { return bpf_kfunc_implicit_arg_legacy(3, 4); } SEC("syscall") __retval(11) int test_kfunc_implicit_arg_legacy_impl(void *ctx) { return bpf_kfunc_implicit_arg_legacy_impl(5, 6, NULL); }