linux-stable/tools/testing/selftests/bpf/prog_tests/endian.c
Andrii Nakryiko 8c18311067 selftests/bpf: Add byte swapping selftest
Add simple selftest validating byte swap built-ins and compile-time macros.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200630152125.3631920-3-andriin@fb.com
2020-07-01 09:06:12 +02:00

53 lines
1.4 KiB
C

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
#include <test_progs.h>
#include "test_endian.skel.h"
static int duration;
#define IN16 0x1234
#define IN32 0x12345678U
#define IN64 0x123456789abcdef0ULL
#define OUT16 0x3412
#define OUT32 0x78563412U
#define OUT64 0xf0debc9a78563412ULL
void test_endian(void)
{
struct test_endian* skel;
struct test_endian__bss *bss;
int err;
skel = test_endian__open_and_load();
if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
return;
bss = skel->bss;
bss->in16 = IN16;
bss->in32 = IN32;
bss->in64 = IN64;
err = test_endian__attach(skel);
if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
goto cleanup;
usleep(1);
CHECK(bss->out16 != OUT16, "out16", "got 0x%llx != exp 0x%llx\n",
(__u64)bss->out16, (__u64)OUT16);
CHECK(bss->out32 != OUT32, "out32", "got 0x%llx != exp 0x%llx\n",
(__u64)bss->out32, (__u64)OUT32);
CHECK(bss->out64 != OUT64, "out16", "got 0x%llx != exp 0x%llx\n",
(__u64)bss->out64, (__u64)OUT64);
CHECK(bss->const16 != OUT16, "const16", "got 0x%llx != exp 0x%llx\n",
(__u64)bss->const16, (__u64)OUT16);
CHECK(bss->const32 != OUT32, "const32", "got 0x%llx != exp 0x%llx\n",
(__u64)bss->const32, (__u64)OUT32);
CHECK(bss->const64 != OUT64, "const64", "got 0x%llx != exp 0x%llx\n",
(__u64)bss->const64, (__u64)OUT64);
cleanup:
test_endian__destroy(skel);
}