diff options
Diffstat (limited to 'security/nss/lib/freebl/verified/karamel/include/krml/lowstar_endianness.h')
| -rw-r--r-- | security/nss/lib/freebl/verified/karamel/include/krml/lowstar_endianness.h | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/verified/karamel/include/krml/lowstar_endianness.h b/security/nss/lib/freebl/verified/karamel/include/krml/lowstar_endianness.h new file mode 100644 index 0000000000..fa66dc8e81 --- /dev/null +++ b/security/nss/lib/freebl/verified/karamel/include/krml/lowstar_endianness.h @@ -0,0 +1,243 @@ +/* Copyright (c) INRIA and Microsoft Corporation. All rights reserved. + Licensed under the Apache 2.0 License. */ + +#ifndef __LOWSTAR_ENDIANNESS_H +#define __LOWSTAR_ENDIANNESS_H + +#include <string.h> +#include <inttypes.h> + +/******************************************************************************/ +/* Implementing C.fst (part 2: endian-ness macros) */ +/******************************************************************************/ + +/* ... for Linux */ +#if defined(__linux__) || defined(__CYGWIN__) || defined(__USE_SYSTEM_ENDIAN_H__) || defined(__GLIBC__) +#include <endian.h> + +/* ... for OSX */ +#elif defined(__APPLE__) +#include <libkern/OSByteOrder.h> +#define htole64(x) OSSwapHostToLittleInt64(x) +#define le64toh(x) OSSwapLittleToHostInt64(x) +#define htobe64(x) OSSwapHostToBigInt64(x) +#define be64toh(x) OSSwapBigToHostInt64(x) + +#define htole16(x) OSSwapHostToLittleInt16(x) +#define le16toh(x) OSSwapLittleToHostInt16(x) +#define htobe16(x) OSSwapHostToBigInt16(x) +#define be16toh(x) OSSwapBigToHostInt16(x) + +#define htole32(x) OSSwapHostToLittleInt32(x) +#define le32toh(x) OSSwapLittleToHostInt32(x) +#define htobe32(x) OSSwapHostToBigInt32(x) +#define be32toh(x) OSSwapBigToHostInt32(x) + +/* ... for Solaris */ +#elif defined(__sun__) +#include <sys/byteorder.h> +#define htole64(x) LE_64(x) +#define le64toh(x) LE_64(x) +#define htobe64(x) BE_64(x) +#define be64toh(x) BE_64(x) + +#define htole16(x) LE_16(x) +#define le16toh(x) LE_16(x) +#define htobe16(x) BE_16(x) +#define be16toh(x) BE_16(x) + +#define htole32(x) LE_32(x) +#define le32toh(x) LE_32(x) +#define htobe32(x) BE_32(x) +#define be32toh(x) BE_32(x) + +/* ... for the BSDs */ +#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) +#include <sys/endian.h> +#elif defined(__OpenBSD__) +#include <endian.h> + +/* ... for Windows (MSVC)... not targeting XBOX 360! */ +#elif defined(_MSC_VER) + +#include <stdlib.h> +#define htobe16(x) _byteswap_ushort(x) +#define htole16(x) (x) +#define be16toh(x) _byteswap_ushort(x) +#define le16toh(x) (x) + +#define htobe32(x) _byteswap_ulong(x) +#define htole32(x) (x) +#define be32toh(x) _byteswap_ulong(x) +#define le32toh(x) (x) + +#define htobe64(x) _byteswap_uint64(x) +#define htole64(x) (x) +#define be64toh(x) _byteswap_uint64(x) +#define le64toh(x) (x) + +/* ... for Windows (GCC-like, e.g. mingw or clang) */ +#elif (defined(_WIN32) || defined(_WIN64) || defined(__EMSCRIPTEN__)) && \ + (defined(__GNUC__) || defined(__clang__)) + +#define htobe16(x) __builtin_bswap16(x) +#define htole16(x) (x) +#define be16toh(x) __builtin_bswap16(x) +#define le16toh(x) (x) + +#define htobe32(x) __builtin_bswap32(x) +#define htole32(x) (x) +#define be32toh(x) __builtin_bswap32(x) +#define le32toh(x) (x) + +#define htobe64(x) __builtin_bswap64(x) +#define htole64(x) (x) +#define be64toh(x) __builtin_bswap64(x) +#define le64toh(x) (x) + +/* ... generic big-endian fallback code */ +/* ... AIX doesn't have __BYTE_ORDER__ (with XLC compiler) & is always big-endian */ +#elif (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) || defined(_AIX) + +/* byte swapping code inspired by: + * https://github.com/rweather/arduinolibs/blob/master/libraries/Crypto/utility/EndianUtil.h + * */ + +#define htobe32(x) (x) +#define be32toh(x) (x) +#define htole32(x) \ + (__extension__({ \ + uint32_t _temp = (x); \ + ((_temp >> 24) & 0x000000FF) | ((_temp >> 8) & 0x0000FF00) | \ + ((_temp << 8) & 0x00FF0000) | ((_temp << 24) & 0xFF000000); \ + })) +#define le32toh(x) (htole32((x))) + +#define htobe64(x) (x) +#define be64toh(x) (x) +#define htole64(x) \ + (__extension__({ \ + uint64_t __temp = (x); \ + uint32_t __low = htobe32((uint32_t)__temp); \ + uint32_t __high = htobe32((uint32_t)(__temp >> 32)); \ + (((uint64_t)__low) << 32) | __high; \ + })) +#define le64toh(x) (htole64((x))) + +/* ... generic little-endian fallback code */ +#elif defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ + +#define htole32(x) (x) +#define le32toh(x) (x) +#define htobe32(x) \ + (__extension__({ \ + uint32_t _temp = (x); \ + ((_temp >> 24) & 0x000000FF) | ((_temp >> 8) & 0x0000FF00) | \ + ((_temp << 8) & 0x00FF0000) | ((_temp << 24) & 0xFF000000); \ + })) +#define be32toh(x) (htobe32((x))) + +#define htole64(x) (x) +#define le64toh(x) (x) +#define htobe64(x) \ + (__extension__({ \ + uint64_t __temp = (x); \ + uint32_t __low = htobe32((uint32_t)__temp); \ + uint32_t __high = htobe32((uint32_t)(__temp >> 32)); \ + (((uint64_t)__low) << 32) | __high; \ + })) +#define be64toh(x) (htobe64((x))) + +/* ... couldn't determine endian-ness of the target platform */ +#else +#error "Please define __BYTE_ORDER__!" + +#endif /* defined(__linux__) || ... */ + +/* Loads and stores. These avoid undefined behavior due to unaligned memory + * accesses, via memcpy. */ + +inline static uint16_t +load16(uint8_t *b) +{ + uint16_t x; + memcpy(&x, b, 2); + return x; +} + +inline static uint32_t +load32(uint8_t *b) +{ + uint32_t x; + memcpy(&x, b, 4); + return x; +} + +inline static uint64_t +load64(uint8_t *b) +{ + uint64_t x; + memcpy(&x, b, 8); + return x; +} + +inline static void +store16(uint8_t *b, uint16_t i) +{ + memcpy(b, &i, 2); +} + +inline static void +store32(uint8_t *b, uint32_t i) +{ + memcpy(b, &i, 4); +} + +inline static void +store64(uint8_t *b, uint64_t i) +{ + memcpy(b, &i, 8); +} + +/* Legacy accessors so that this header can serve as an implementation of + * C.Endianness */ +#define load16_le(b) (le16toh(load16(b))) +#define store16_le(b, i) (store16(b, htole16(i))) +#define load16_be(b) (be16toh(load16(b))) +#define store16_be(b, i) (store16(b, htobe16(i))) + +#define load32_le(b) (le32toh(load32(b))) +#define store32_le(b, i) (store32(b, htole32(i))) +#define load32_be(b) (be32toh(load32(b))) +#define store32_be(b, i) (store32(b, htobe32(i))) + +#define load64_le(b) (le64toh(load64(b))) +#define store64_le(b, i) (store64(b, htole64(i))) +#define load64_be(b) (be64toh(load64(b))) +#define store64_be(b, i) (store64(b, htobe64(i))) + +/* Co-existence of LowStar.Endianness and FStar.Endianness generates name + * conflicts, because of course both insist on having no prefixes. Until a + * prefix is added, or until we truly retire FStar.Endianness, solve this issue + * in an elegant way. */ +#define load16_le0 load16_le +#define store16_le0 store16_le +#define load16_be0 load16_be +#define store16_be0 store16_be + +#define load32_le0 load32_le +#define store32_le0 store32_le +#define load32_be0 load32_be +#define store32_be0 store32_be + +#define load64_le0 load64_le +#define store64_le0 store64_le +#define load64_be0 load64_be +#define store64_be0 store64_be + +#define load128_le0 load128_le +#define store128_le0 store128_le +#define load128_be0 load128_be +#define store128_be0 store128_be + +#endif |