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8c18311067
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
37 lines
700 B
C
37 lines
700 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Facebook */
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_endian.h>
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#define IN16 0x1234
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#define IN32 0x12345678U
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#define IN64 0x123456789abcdef0ULL
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__u16 in16 = 0;
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__u32 in32 = 0;
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__u64 in64 = 0;
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__u16 out16 = 0;
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__u32 out32 = 0;
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__u64 out64 = 0;
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__u16 const16 = 0;
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__u32 const32 = 0;
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__u64 const64 = 0;
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SEC("raw_tp/sys_enter")
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int sys_enter(const void *ctx)
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{
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out16 = __builtin_bswap16(in16);
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out32 = __builtin_bswap32(in32);
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out64 = __builtin_bswap64(in64);
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const16 = ___bpf_swab16(IN16);
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const32 = ___bpf_swab32(IN32);
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const64 = ___bpf_swab64(IN64);
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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