/usr/lib/klibc/include/byteswap.h is in libklibc-dev 1.5.25-1ubuntu2.
This file is owned by root:root, with mode 0o664.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | /*
* byteswap.h
*/
#ifndef _BYTESWAP_H
#define _BYTESWAP_H
#include <klibc/compiler.h>
#include <asm/byteorder.h>
#define bswap_16(x) __swab16(x)
#define bswap_32(x) __swab32(x)
#define bswap_64(x) __swab64(x)
#endif /* _BYTESWAP_H */
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