| #include <linux/ptrace.h> |
| #include <linux/version.h> |
| #include <uapi/linux/bpf.h> |
| #include "bpf_helpers.h" |
| |
| struct bpf_map_def SEC("maps") my_map = { |
| .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY, |
| .key_size = sizeof(int), |
| .value_size = sizeof(u32), |
| .max_entries = 32, |
| }; |
| |
| SEC("kprobe/sys_write") |
| int bpf_prog1(struct pt_regs *ctx) |
| { |
| u64 count; |
| u32 key = bpf_get_smp_processor_id(); |
| char fmt[] = "CPU-%d %llu\n"; |
| |
| count = bpf_perf_event_read(&my_map, key); |
| bpf_trace_printk(fmt, sizeof(fmt), key, count); |
| |
| return 0; |
| } |
| |
| char _license[] SEC("license") = "GPL"; |
| u32 _version SEC("version") = LINUX_VERSION_CODE; |
