| // SPDX-License-Identifier: GPL-2.0 | |
| // Copyright (c) 2019 Facebook | |
| #include <linux/ptrace.h> | |
| #include <linux/bpf.h> | |
| #include <bpf/bpf_helpers.h> | |
| #include <bpf/bpf_tracing.h> | |
| struct { | |
| __uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY); | |
| __uint(key_size, sizeof(int)); | |
| __uint(value_size, sizeof(int)); | |
| } perf_buf_map SEC(".maps"); | |
| SEC("tp/raw_syscalls/sys_enter") | |
| int handle_sys_enter(void *ctx) | |
| { | |
| int cpu = bpf_get_smp_processor_id(); | |
| bpf_perf_event_output(ctx, &perf_buf_map, BPF_F_CURRENT_CPU, | |
| &cpu, sizeof(cpu)); | |
| return 0; | |
| } | |
| char _license[] SEC("license") = "GPL"; |