// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2019 Facebook */ #include <stdbool.h> #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #define __read_mostly SEC(".data.read_mostly") struct s { int a; long long b; } __attribute__((packed)); /* .data section */ int in1 = -1; long long in2 = -1; /* .bss section */ char in3 = '\0'; long long in4 __attribute__((aligned(64))) = 0; struct s in5 = {}; /* .rodata section */ const volatile struct { const int in6; } in = {}; /* .data section */ int out1 = -1; long long out2 = -1; /* .bss section */ char out3 = 0; long long out4 = 0; int out6 = 0; extern bool CONFIG_BPF_SYSCALL __kconfig; extern int LINUX_KERNEL_VERSION __kconfig; bool bpf_syscall = 0; int kern_ver = 0; struct s out5 = {}; const volatile int in_dynarr_sz SEC(".rodata.dyn"); const volatile int in_dynarr[4] SEC(".rodata.dyn") = { -1, -2, -3, -4 }; int out_dynarr[4] SEC(".data.dyn") = { 1, 2, 3, 4 }; int read_mostly_var __read_mostly; int out_mostly_var; SEC("raw_tp/sys_enter") int handler(const void *ctx) { int i; out1 = in1; out2 = in2; out3 = in3; out4 = in4; out5 = in5; out6 = in.in6; bpf_syscall = CONFIG_BPF_SYSCALL; kern_ver = LINUX_KERNEL_VERSION; for (i = 0; i < in_dynarr_sz; i++) out_dynarr[i] = in_dynarr[i]; out_mostly_var = read_mostly_var; return 0; } char _license[] SEC("license") = "GPL";