1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2019 Facebook */ 3 4 #include <stdbool.h> 5 #include <linux/bpf.h> 6 #include <bpf/bpf_helpers.h> 7 8 __u64 out__bpf_link_fops = -1; 9 __u64 out__bpf_link_fops1 = -1; 10 __u64 out__btf_size = -1; 11 __u64 out__per_cpu_start = -1; 12 13 extern const void bpf_link_fops __ksym; 14 extern const void __start_BTF __ksym; 15 extern const void __stop_BTF __ksym; 16 extern const void __per_cpu_start __ksym; 17 /* non-existing symbol, weak, default to zero */ 18 extern const void bpf_link_fops1 __ksym __weak; 19 20 SEC("raw_tp/sys_enter") 21 int handler(const void *ctx) 22 { 23 out__bpf_link_fops = (__u64)&bpf_link_fops; 24 out__btf_size = (__u64)(&__stop_BTF - &__start_BTF); 25 out__per_cpu_start = (__u64)&__per_cpu_start; 26 27 out__bpf_link_fops1 = (__u64)&bpf_link_fops1; 28 29 return 0; 30 } 31 32 char _license[] SEC("license") = "GPL"; 33