1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) Meta Platforms, Inc. and affiliates. */
3
4 #include <stdbool.h>
5 #include <linux/bpf.h>
6 #include <bpf/bpf_helpers.h>
7
8 /* volatile to force a read */
9 const volatile int var1;
10 volatile int var2 = 1;
11 struct {
12 int var3_1;
13 __s64 var3_2;
14 } var3;
15 int libout1;
16
17 extern volatile bool CONFIG_BPF_SYSCALL __kconfig;
18
19 int var4[4];
20
21 __weak int var5 SEC(".data");
22
23 /* Fully contained within library extern-and-definition */
24 extern int var6;
25
26 int var7 SEC(".data.custom");
27
28 int (*fn_ptr)(void);
29
30 struct {
31 __uint(type, BPF_MAP_TYPE_HASH);
32 __type(key, __u32);
33 __type(value, __u32);
34 __uint(max_entries, 16);
35 } map1 SEC(".maps");
36
37 extern struct {
38 __uint(type, BPF_MAP_TYPE_HASH);
39 __type(key, __u32);
40 __type(value, __u32);
41 __uint(max_entries, 16);
42 } map2 SEC(".maps");
43
44 int lib_routine(void)
45 {
46 __u32 key = 1, value = 2;
47
48 (void) CONFIG_BPF_SYSCALL;
49 bpf_map_update_elem(&map2, &key, &value, BPF_ANY);
50
51 libout1 = var1 + var2 + var3.var3_1 + var3.var3_2 + var5 + var6;
52 return libout1;
53 }
54
55 SEC("perf_event")
56 int lib_perf_handler(struct pt_regs *ctx)
57 {
58 return 0;
59 }
60
61 char LICENSE[] SEC("license") = "GPL";
62
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