bpf_object__btf_fd 3388 tools/lib/bpf/libbpf.c btf_fd = bpf_object__btf_fd(prog->obj); bpf_object__btf_fd 107 tools/lib/bpf/libbpf.h LIBBPF_API int bpf_object__btf_fd(const struct bpf_object *obj); bpf_object__btf_fd 4151 tools/testing/selftests/bpf/test_btf.c err = bpf_object__btf_fd(obj);