diff options
Diffstat (limited to 'gcc/lto/lto-endian.h')
| -rw-r--r-- | gcc/lto/lto-endian.h | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/gcc/lto/lto-endian.h b/gcc/lto/lto-endian.h new file mode 100644 index 00000000000..1f51cee79e9 --- /dev/null +++ b/gcc/lto/lto-endian.h @@ -0,0 +1,205 @@ +/* Very simple endian-ness layer for LTO object file handling + Copyright 2010 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 3, or (at your option) any later +version. + +GCC is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +/* This header file provides a simple way to handle object files in + another endian-ness than the host machine. This is necesarry to + enable cross-compilation with LTO enabled. Targets that use the + ELF binary object format do not need this (libelf already handles + endian-ness) but for COFF and Mach-O the functions in this header + are used in the minimal binary object reader/writer. + + For all functions in this header, the user is responsible for + making sure that the memory accesses are valid. */ + +#ifndef GCC_LTO_ENDIAN_H +#define GCC_LTO_ENDIAN_H + +#include <stdint.h> +#include <inttypes.h> + +static inline uint16_t +get_uint16_le (const unsigned char *ptr) +{ + return ptr[0] | (ptr[1] << 8); +} + +static inline uint32_t +get_uint32_le (const unsigned char *ptr) +{ + return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24); +} + +static inline uint64_t +get_uint64_le (const unsigned char *ptr_) +{ +#define ptr (uint64_t) ptr_ + return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24) + | (ptr[4] << 32) | (ptr[5] << 40) | (ptr[6] << 48) | (ptr[7] << 56); +#undef ptr +} + +static inline uint16_t +get_uint16_be (const unsigned char *ptr) +{ + return ptr[1] | (ptr[2] << 8); +} + +static inline uint32_t +get_uint32_be (const unsigned char *ptr) +{ + return ptr[3] | (ptr[2] << 8) | (ptr[1] << 16) | (ptr[0] << 24); +} + +static inline uint64_t +get_uint64_be (const unsigned char *ptr_) +{ +#define ptr (uint64_t) ptr_ + return ptr[7] | (ptr[6] << 8) | (ptr[5] << 16) | (ptr[4] << 24) + | (ptr[3] << 32) | (ptr[2] << 40) | (ptr[1] << 48) | (ptr[0] << 56); +#undef ptr +} + +static inline void +put_uint16_le (unsigned char *ptr, uint16_t data) +{ + ptr[0] = data & 0xff; + ptr[1] = (data >> 8) & 0xff; +} + +static inline void +put_uint32_le (unsigned char *ptr, uint32_t data) +{ + ptr[0] = data & 0xff; + ptr[1] = (data >> 8) & 0xff; + ptr[2] = (data >> 16) & 0xff; + ptr[3] = (data >> 24) & 0xff; +} + +static inline void +put_uint64_le (unsigned char *ptr, uint64_t data) +{ + ptr[0] = data & 0xff; + ptr[1] = (data >> 8) & 0xff; + ptr[2] = (data >> 16) & 0xff; + ptr[3] = (data >> 24) & 0xff; + ptr[4] = (data >> 32) & 0xff; + ptr[5] = (data >> 40) & 0xff; + ptr[6] = (data >> 48) & 0xff; + ptr[7] = (data >> 56) & 0xff; +} + +static inline void +put_uint16_be (unsigned char *ptr, uint16_t data) +{ + ptr[1] = data & 0xff; + ptr[0] = (data >> 8) & 0xff; +} + +static inline void +put_uint32_be (unsigned char *ptr, uint32_t data) +{ + ptr[3] = data & 0xff; + ptr[2] = (data >> 8) & 0xff; + ptr[1] = (data >> 16) & 0xff; + ptr[0] = (data >> 24) & 0xff; +} + +static inline void +put_uint64_be (unsigned char *ptr, uint64_t data) +{ + ptr[7] = data & 0xff; + ptr[6] = (data >> 8) & 0xff; + ptr[5] = (data >> 16) & 0xff; + ptr[4] = (data >> 24) & 0xff; + ptr[3] = (data >> 32) & 0xff; + ptr[2] = (data >> 40) & 0xff; + ptr[1] = (data >> 48) & 0xff; + ptr[0] = (data >> 56) & 0xff; +} + +static inline void +get_string (unsigned char *ptr, char *dest, size_t len) +{ + memcpy (dest, ptr, len); +} + +static inline void +put_string (unsigned char *ptr, char *src, size_t len) +{ + memcpy (ptr, src, len); +} + +/* Use the target macro BYTES_BIG_ENDIAN to choose. */ + +static inline uint16_t +get_uint16 (const unsigned char *ptr) +{ + if (BYTES_BIG_ENDIAN) + return get_uint16_be (ptr); + else + return get_uint16_le (ptr); +} + +static inline uint32_t +get_uint32 (const unsigned char *ptr) +{ + if (BYTES_BIG_ENDIAN) + return get_uint32_be (ptr); + else + return get_uint32_le (ptr); +} + +static inline uint64_t +get_uint64 (const unsigned char *ptr) +{ + if (BYTES_BIG_ENDIAN) + return get_uint64_be (ptr); + else + return get_uint64_le (ptr); +} + +static inline void +put_uint16 (unsigned char *ptr, uint16_t data) +{ + if (BYTES_BIG_ENDIAN) + put_uint16_be (ptr, data); + else + put_uint16_le (ptr, data); +} + +static inline void +put_uint32 (unsigned char *ptr, uint32_t data) +{ + if (BYTES_BIG_ENDIAN) + put_uint32_be (ptr, data); + else + put_uint32_le (ptr, data); +} + +static inline void +put_uint64 (unsigned char *ptr, uint64_t data) +{ + if (BYTES_BIG_ENDIAN) + put_uint64_be (ptr, data); + else + put_uint64_le (ptr, data); +} + +#endif /* GCC_LTO_ENDIAN_H */ + |