1 | // SPDX-License-Identifier: GPL-2.0 |
2 | |
3 | #include <linux/bpf.h> |
4 | #include <bpf/bpf_helpers.h> |
5 | #include <bpf/bpf_tracing.h> |
6 | |
7 | #include <sys/types.h> |
8 | |
9 | pid_t pid = 0; |
10 | long ret = 0; |
11 | void *user_ptr = 0; |
12 | char buf[256] = {}; |
13 | |
14 | SEC("tracepoint/syscalls/sys_enter_nanosleep" ) |
15 | int on_write(void *ctx) |
16 | { |
17 | if (pid != (bpf_get_current_pid_tgid() >> 32)) |
18 | return 0; |
19 | |
20 | ret = bpf_probe_read_user_str(buf, sizeof(buf), user_ptr); |
21 | |
22 | return 0; |
23 | } |
24 | |
25 | char _license[] SEC("license" ) = "GPL" ; |
26 | |