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1// SPDX-License-Identifier: GPL-2.02/* 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