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/* SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef _OBJTOOL_ENDIANNESS_H #define _OBJTOOL_ENDIANNESS_H #include <arch/endianness.h> #include <linux/kernel.h> #include <endian.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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