1 #include <linux/ptrace.h>
2 #include <linux/version.h>
3 #include <uapi/linux/bpf.h>
4 #include <bpf/bpf_helpers.h>
5 #include "trace_common.h"
6 
7 struct {
8 	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
9 	__uint(key_size, sizeof(int));
10 	__uint(value_size, sizeof(u32));
11 	__uint(max_entries, 2);
12 } my_map SEC(".maps");
13 
SYSCALL(sys_write)14 SEC("kprobe/" SYSCALL(sys_write))
15 int bpf_prog1(struct pt_regs *ctx)
16 {
17 	struct S {
18 		u64 pid;
19 		u64 cookie;
20 	} data;
21 
22 	data.pid = bpf_get_current_pid_tgid();
23 	data.cookie = 0x12345678;
24 
25 	bpf_perf_event_output(ctx, &my_map, 0, &data, sizeof(data));
26 
27 	return 0;
28 }
29 
30 char _license[] SEC("license") = "GPL";
31 u32 _version SEC("version") = LINUX_VERSION_CODE;
32