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