tools/testing/selftests/bpf/progs/test_skeleton.c

   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 struct {
  24         const int in6;
  25 } in = {};
  26
  27 /* .data section */
  28 int out1 = -1;
  29 long long out2 = -1;
  30
  31 /* .bss section */
  32 char out3 = 0;
  33 long long out4 = 0;
  34 int out6 = 0;
  35
  36 extern bool CONFIG_BPF_SYSCALL __kconfig;
  37 extern int LINUX_KERNEL_VERSION __kconfig;
  38 bool bpf_syscall = 0;
  39 int kern_ver = 0;
  40
  41 SEC("raw_tp/sys_enter")
  42 int handler(const void *ctx)
  43 {
  44         static volatile struct s out5;
  45
  46         out1 = in1;
  47         out2 = in2;
  48         out3 = in3;
  49         out4 = in4;
  50         out5 = in5;
  51         out6 = in.in6;
  52
  53         bpf_syscall = CONFIG_BPF_SYSCALL;
  54         kern_ver = LINUX_KERNEL_VERSION;
  55
  56         return 0;
  57 }
  58
  59 char _license[] SEC("license") = "GPL";