1#include <linux/ptrace.h>
2#include <linux/version.h>
3#include <uapi/linux/bpf.h>
4#include "bpf_helpers.h"
5
6struct bpf_map_def SEC("maps") my_map = {
7	.type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
8	.key_size = sizeof(int),
9	.value_size = sizeof(u32),
10	.max_entries = 32,
11};
12
13SEC("kprobe/sys_write")
14int bpf_prog1(struct pt_regs *ctx)
15{
16	u64 count;
17	u32 key = bpf_get_smp_processor_id();
18	char fmt[] = "CPU-%d   %llu\n";
19
20	count = bpf_perf_event_read(&my_map, key);
21	bpf_trace_printk(fmt, sizeof(fmt), key, count);
22
23	return 0;
24}
25
26char _license[] SEC("license") = "GPL";
27u32 _version SEC("version") = LINUX_VERSION_CODE;
28