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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2020 Facebook */
   3
   4 #include "vmlinux.h"
   5 #include <bpf/bpf_helpers.h>
   6 #include <bpf/bpf_endian.h>
   7
   8 #define IN16 0x1234
   9 #define IN32 0x12345678U
  10 #define IN64 0x123456789abcdef0ULL
  11
  12 __u16 in16 = 0;
  13 __u32 in32 = 0;
  14 __u64 in64 = 0;
  15
  16 __u16 out16 = 0;
  17 __u32 out32 = 0;
  18 __u64 out64 = 0;
  19
  20 __u16 const16 = 0;
  21 __u32 const32 = 0;
  22 __u64 const64 = 0;
  23
  24 SEC("raw_tp/sys_enter")
  25 int sys_enter(const void *ctx)
  26 {
  27         out16 = __builtin_bswap16(in16);
  28         out32 = __builtin_bswap32(in32);
  29         out64 = __builtin_bswap64(in64);
  30         const16 = ___bpf_swab16(IN16);
  31         const32 = ___bpf_swab32(IN32);
  32         const64 = ___bpf_swab64(IN64);
  33
  34         return 0;
  35 }
  36
  37 char _license[] SEC("license") = "GPL";