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 */
9const volatile int var1;
10volatile int var2 = 1;
11struct {
12	int var3_1;
13	__s64 var3_2;
14} var3;
15int libout1;
16
17extern volatile bool CONFIG_BPF_SYSCALL __kconfig;
18
19int var4[4];
20
21__weak int var5 SEC(".data");
22
23/* Fully contained within library extern-and-definition */
24extern int var6;
25
26int var7 SEC(".data.custom");
27
28int (*fn_ptr)(void);
29
30struct {
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
37extern 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
44int 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
55SEC("perf_event")
56int lib_perf_handler(struct pt_regs *ctx)
57{
58	return 0;
59}
60
61char LICENSE[] SEC("license") = "GPL";
62