1// SPDX-License-Identifier: GPL-2.0
 2// Copyright (c) 2019 Facebook
 3
 4#include <linux/ptrace.h>
 5#include <linux/bpf.h>
 6#include <bpf/bpf_helpers.h>
 7#include <bpf/bpf_tracing.h>
 8
 9struct {
10	__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
11	__uint(key_size, sizeof(int));
12	__uint(value_size, sizeof(int));
13} perf_buf_map SEC(".maps");
14
15SEC("tp/raw_syscalls/sys_enter")
16int handle_sys_enter(void *ctx)
17{
18	int cpu = bpf_get_smp_processor_id();
19
20	bpf_perf_event_output(ctx, &perf_buf_map, BPF_F_CURRENT_CPU,
21			      &cpu, sizeof(cpu));
22	return 0;
23}
24
25char _license[] SEC("license") = "GPL";