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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _OBJTOOL_ENDIANNESS_H
#define _OBJTOOL_ENDIANNESS_H
#include <linux/kernel.h>
#include <endian.h>
#include "arch_endianness.h"
#ifndef __TARGET_BYTE_ORDER
#error undefined arch __TARGET_BYTE_ORDER
#endif
#if __BYTE_ORDER != __TARGET_BYTE_ORDER
#define __NEED_BSWAP 1
#else
#define __NEED_BSWAP 0
#endif
/*
* Does a byte swap if target endianness doesn't match the host, i.e. cross
* compilation for little endian on big endian and vice versa.
* To be used for multi-byte values conversion, which are read from / about
* to be written to a target native endianness ELF file.
*/
#define bswap_if_needed(val) \
({ \
__typeof__(val) __ret; \
switch (sizeof(val)) { \
case 8: __ret = __NEED_BSWAP ? bswap_64(val) : (val); break; \
case 4: __ret = __NEED_BSWAP ? bswap_32(val) : (val); break; \
case 2: __ret = __NEED_BSWAP ? bswap_16(val) : (val); break; \
default: \
BUILD_BUG(); break; \
} \
__ret; \
})
#endif /* _OBJTOOL_ENDIANNESS_H */
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