#include <linux/ptrace.h>
  #include <linux/version.h>
  #include <uapi/linux/bpf.h>
  #include "bpf_helpers.h"
  
  struct bpf_map_def SEC("maps") my_map = {
  	.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
  	.key_size = sizeof(int),
  	.value_size = sizeof(u32),
  	.max_entries = 2,
  };
  
  SEC("kprobe/sys_write")
  int bpf_prog1(struct pt_regs *ctx)
  {
  	struct S {
  		u64 pid;
  		u64 cookie;
  	} data;
  
  	data.pid = bpf_get_current_pid_tgid();
  	data.cookie = 0x12345678;
  
  	bpf_perf_event_output(ctx, &my_map, 0, &data, sizeof(data));
  
  	return 0;
  }
  
  char _license[] SEC("license") = "GPL";
  u32 _version SEC("version") = LINUX_VERSION_CODE;