1 #include <linux/ptrace.h>
2 #include <linux/version.h>
3 #include <uapi/linux/bpf.h>
4 #include "bpf_helpers.h"
6 struct bpf_map_def SEC("maps") counters = {
7 .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
8 .key_size = sizeof(int),
9 .value_size = sizeof(u32),
12 struct bpf_map_def SEC("maps") values = {
13 .type = BPF_MAP_TYPE_HASH,
14 .key_size = sizeof(int),
15 .value_size = sizeof(u64),
19 SEC("kprobe/htab_map_get_next_key")
20 int bpf_prog1(struct pt_regs *ctx)
22 u32 key = bpf_get_smp_processor_id();
26 count = bpf_perf_event_read(&counters, key);
28 if (error <= -2 && error >= -22)
31 val = bpf_map_lookup_elem(&values, &key);
35 bpf_map_update_elem(&values, &key, &count, BPF_NOEXIST);
40 char _license[] SEC("license") = "GPL";
41 u32 _version SEC("version") = LINUX_VERSION_CODE;