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[linux.git] / tools / testing / selftests / bpf / progs / test_obj_id.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Copyright (c) 2017 Facebook
3  */
4 #include <stddef.h>
5 #include <linux/bpf.h>
6 #include <bpf/bpf_helpers.h>
7 #include "bpf_misc.h"
8
9 struct {
10         __uint(type, BPF_MAP_TYPE_ARRAY);
11         __uint(max_entries, 1);
12         __type(key, __u32);
13         __type(value, __u64);
14 } test_map_id SEC(".maps");
15
16 SEC("raw_tp/sys_enter")
17 int test_obj_id(void *ctx)
18 {
19         __u32 key = 0;
20         __u64 *value;
21
22         value = bpf_map_lookup_elem(&test_map_id, &key);
23         __sink(value);
24
25         return 0;
26 }
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