1// SPDX-License-Identifier: GPL-2.0
2
3#include <linux/bpf.h>
4#include <bpf/bpf_helpers.h>
5#include "bpf_misc.h"
6
7#if (defined(__TARGET_ARCH_arm64) || defined(__TARGET_ARCH_x86) || \
8 (defined(__TARGET_ARCH_riscv) && __riscv_xlen == 64) || \
9 defined(__TARGET_ARCH_arm) || defined(__TARGET_ARCH_s390) || \
10 defined(__TARGET_ARCH_loongarch)) && \
11 __clang_major__ >= 18
12
13SEC("socket")
14__description("BSWAP, 16")
15__success __success_unpriv __retval(0x23ff)
16__naked void bswap_16(void)
17{
18 asm volatile (" \
19 r0 = 0xff23; \
20 r0 = bswap16 r0; \
21 exit; \
22" ::: __clobber_all);
23}
24
25SEC("socket")
26__description("BSWAP, 32")
27__success __success_unpriv __retval(0x23ff0000)
28__naked void bswap_32(void)
29{
30 asm volatile (" \
31 r0 = 0xff23; \
32 r0 = bswap32 r0; \
33 exit; \
34" ::: __clobber_all);
35}
36
37SEC("socket")
38__description("BSWAP, 64")
39__success __success_unpriv __retval(0x34ff12ff)
40__naked void bswap_64(void)
41{
42 asm volatile (" \
43 r0 = %[u64_val] ll; \
44 r0 = bswap64 r0; \
45 exit; \
46" :
47 : [u64_val]"i"(0xff12ff34ff56ff78ull)
48 : __clobber_all);
49}
50
51#else
52
53SEC("socket")
54__description("cpuv4 is not supported by compiler or jit, use a dummy test")
55__success
56int dummy_test(void)
57{
58 return 0;
59}
60
61#endif
62
63char _license[] SEC("license") = "GPL";
64

source code of linux/tools/testing/selftests/bpf/progs/verifier_bswap.c