xref: /OK3568_Linux_fs/kernel/tools/testing/selftests/bpf/progs/test_endian.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /* Copyright (c) 2020 Facebook */
3*4882a593Smuzhiyun 
4*4882a593Smuzhiyun #include "vmlinux.h"
5*4882a593Smuzhiyun #include <bpf/bpf_helpers.h>
6*4882a593Smuzhiyun #include <bpf/bpf_endian.h>
7*4882a593Smuzhiyun 
8*4882a593Smuzhiyun #define IN16 0x1234
9*4882a593Smuzhiyun #define IN32 0x12345678U
10*4882a593Smuzhiyun #define IN64 0x123456789abcdef0ULL
11*4882a593Smuzhiyun 
12*4882a593Smuzhiyun __u16 in16 = 0;
13*4882a593Smuzhiyun __u32 in32 = 0;
14*4882a593Smuzhiyun __u64 in64 = 0;
15*4882a593Smuzhiyun 
16*4882a593Smuzhiyun __u16 out16 = 0;
17*4882a593Smuzhiyun __u32 out32 = 0;
18*4882a593Smuzhiyun __u64 out64 = 0;
19*4882a593Smuzhiyun 
20*4882a593Smuzhiyun __u16 const16 = 0;
21*4882a593Smuzhiyun __u32 const32 = 0;
22*4882a593Smuzhiyun __u64 const64 = 0;
23*4882a593Smuzhiyun 
24*4882a593Smuzhiyun SEC("raw_tp/sys_enter")
sys_enter(const void * ctx)25*4882a593Smuzhiyun int sys_enter(const void *ctx)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun 	out16 = __builtin_bswap16(in16);
28*4882a593Smuzhiyun 	out32 = __builtin_bswap32(in32);
29*4882a593Smuzhiyun 	out64 = __builtin_bswap64(in64);
30*4882a593Smuzhiyun 	const16 = ___bpf_swab16(IN16);
31*4882a593Smuzhiyun 	const32 = ___bpf_swab32(IN32);
32*4882a593Smuzhiyun 	const64 = ___bpf_swab64(IN64);
33*4882a593Smuzhiyun 
34*4882a593Smuzhiyun 	return 0;
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun 
37*4882a593Smuzhiyun char _license[] SEC("license") = "GPL";
38