1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2019 Facebook */ 3 4 #include <stdbool.h> 5 #include <linux/bpf.h> 6 #include <bpf/bpf_helpers.h> 7 8 struct s { 9 int a; 10 long long b; 11 } __attribute__((packed)); 12 13 /* .data section */ 14 int in1 = -1; 15 long long in2 = -1; 16 17 /* .bss section */ 18 char in3 = '\0'; 19 long long in4 __attribute__((aligned(64))) = 0; 20 struct s in5 = {}; 21 22 /* .rodata section */ 23 const volatile int in6 = 0; 24 25 /* .data section */ 26 int out1 = -1; 27 long long out2 = -1; 28 29 /* .bss section */ 30 char out3 = 0; 31 long long out4 = 0; 32 int out6 = 0; 33 34 extern bool CONFIG_BPF_SYSCALL __kconfig; 35 extern int LINUX_KERNEL_VERSION __kconfig; 36 bool bpf_syscall = 0; 37 int kern_ver = 0; 38 39 SEC("raw_tp/sys_enter") 40 int handler(const void *ctx) 41 { 42 static volatile struct s out5; 43 44 out1 = in1; 45 out2 = in2; 46 out3 = in3; 47 out4 = in4; 48 out5 = in5; 49 out6 = in6; 50 51 bpf_syscall = CONFIG_BPF_SYSCALL; 52 kern_ver = LINUX_KERNEL_VERSION; 53 54 return 0; 55 } 56 57 char _license[] SEC("license") = "GPL"; 58