tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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";