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"; 38