// SPDX-License-Identifier: GPL-2.0 #include "vmlinux.h" #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> #include <errno.h> char _license[] SEC("license") = "GPL"; __u64 test1_result = 0; SEC("fsession/bpf_fentry_test1") int BPF_PROG(test1) { __u64 cnt = bpf_get_func_arg_cnt(ctx); __u64 a = 0, z = 0, ret = 0; __s64 err; test1_result = cnt == 1; /* valid arguments */ err = bpf_get_func_arg(ctx, 0, &a); test1_result &= err == 0 && ((int) a == 1); /* not valid argument */ err = bpf_get_func_arg(ctx, 1, &z); test1_result &= err == -EINVAL; if (bpf_session_is_return(ctx)) { err = bpf_get_func_ret(ctx, &ret); test1_result &= err == 0 && ret == 2; } else { err = bpf_get_func_ret(ctx, &ret); test1_result &= err == 0 && ret == 0; } return 0; }