diff options
Diffstat (limited to 'library/common.h')
| -rw-r--r-- | library/common.h | 523 |
1 files changed, 204 insertions, 319 deletions
diff --git a/library/common.h b/library/common.h index 25d5294e1..c6ed14b68 100644 --- a/library/common.h +++ b/library/common.h @@ -5,28 +5,23 @@ */ /* * Copyright The Mbed TLS Contributors - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the "License"); you may - * not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT - * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. + * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */ #ifndef MBEDTLS_LIBRARY_COMMON_H #define MBEDTLS_LIBRARY_COMMON_H #include "mbedtls/build_info.h" +#include "alignment.h" +#include <assert.h> #include <stddef.h> #include <stdint.h> +#include <stddef.h> + +#if defined(__ARM_NEON) +#include <arm_neon.h> +#endif /* __ARM_NEON */ /** Helper to define a function as static except when building invasive tests. * @@ -50,18 +45,56 @@ #endif #if defined(MBEDTLS_TEST_HOOKS) -extern void (*mbedtls_test_hook_test_fail)( const char * test, int line, const char * file ); -#define MBEDTLS_TEST_HOOK_TEST_ASSERT( TEST ) \ - do { \ - if( ( ! ( TEST ) ) && ( ( *mbedtls_test_hook_test_fail ) != NULL ) ) \ - { \ - ( *mbedtls_test_hook_test_fail )( #TEST, __LINE__, __FILE__ ); \ - } \ - } while( 0 ) +extern void (*mbedtls_test_hook_test_fail)(const char *test, int line, const char *file); +#define MBEDTLS_TEST_HOOK_TEST_ASSERT(TEST) \ + do { \ + if ((!(TEST)) && ((*mbedtls_test_hook_test_fail) != NULL)) \ + { \ + (*mbedtls_test_hook_test_fail)( #TEST, __LINE__, __FILE__); \ + } \ + } while (0) #else -#define MBEDTLS_TEST_HOOK_TEST_ASSERT( TEST ) +#define MBEDTLS_TEST_HOOK_TEST_ASSERT(TEST) #endif /* defined(MBEDTLS_TEST_HOOKS) */ +/** \def ARRAY_LENGTH + * Return the number of elements of a static or stack array. + * + * \param array A value of array (not pointer) type. + * + * \return The number of elements of the array. + */ +/* A correct implementation of ARRAY_LENGTH, but which silently gives + * a nonsensical result if called with a pointer rather than an array. */ +#define ARRAY_LENGTH_UNSAFE(array) \ + (sizeof(array) / sizeof(*(array))) + +#if defined(__GNUC__) +/* Test if arg and &(arg)[0] have the same type. This is true if arg is + * an array but not if it's a pointer. */ +#define IS_ARRAY_NOT_POINTER(arg) \ + (!__builtin_types_compatible_p(__typeof__(arg), \ + __typeof__(&(arg)[0]))) +/* A compile-time constant with the value 0. If `const_expr` is not a + * compile-time constant with a nonzero value, cause a compile-time error. */ +#define STATIC_ASSERT_EXPR(const_expr) \ + (0 && sizeof(struct { unsigned int STATIC_ASSERT : 1 - 2 * !(const_expr); })) + +/* Return the scalar value `value` (possibly promoted). This is a compile-time + * constant if `value` is. `condition` must be a compile-time constant. + * If `condition` is false, arrange to cause a compile-time error. */ +#define STATIC_ASSERT_THEN_RETURN(condition, value) \ + (STATIC_ASSERT_EXPR(condition) ? 0 : (value)) + +#define ARRAY_LENGTH(array) \ + (STATIC_ASSERT_THEN_RETURN(IS_ARRAY_NOT_POINTER(array), \ + ARRAY_LENGTH_UNSAFE(array))) + +#else +/* If we aren't sure the compiler supports our non-standard tricks, + * fall back to the unsafe implementation. */ +#define ARRAY_LENGTH(array) ARRAY_LENGTH_UNSAFE(array) +#endif /** Allow library to access its structs' private members. * * Although structs defined in header files are publicly available, @@ -69,6 +102,20 @@ extern void (*mbedtls_test_hook_test_fail)( const char * test, int line, const c */ #define MBEDTLS_ALLOW_PRIVATE_ACCESS +/** + * \brief Securely zeroize a buffer then free it. + * + * Similar to making consecutive calls to + * \c mbedtls_platform_zeroize() and \c mbedtls_free(), but has + * code size savings, and potential for optimisation in the future. + * + * Guaranteed to be a no-op if \p buf is \c NULL and \p len is 0. + * + * \param buf Buffer to be zeroized then freed. + * \param len Length of the buffer in bytes + */ +void mbedtls_zeroize_and_free(void *buf, size_t len); + /** Return an offset into a buffer. * * This is just the addition of an offset to a pointer, except that this @@ -85,9 +132,9 @@ extern void (*mbedtls_test_hook_test_fail)( const char * test, int line, const c * buffer is at least \p n + 1. */ static inline unsigned char *mbedtls_buffer_offset( - unsigned char *p, size_t n ) + unsigned char *p, size_t n) { - return( p == NULL ? NULL : p + n ); + return p == NULL ? NULL : p + n; } /** Return an offset into a read-only buffer. @@ -102,339 +149,177 @@ static inline unsigned char *mbedtls_buffer_offset( * buffer is at least \p n + 1. */ static inline const unsigned char *mbedtls_buffer_offset_const( - const unsigned char *p, size_t n ) + const unsigned char *p, size_t n) { - return( p == NULL ? NULL : p + n ); + return p == NULL ? NULL : p + n; } -/** Byte Reading Macros - * - * Given a multi-byte integer \p x, MBEDTLS_BYTE_n retrieves the n-th - * byte from x, where byte 0 is the least significant byte. - */ -#define MBEDTLS_BYTE_0( x ) ( (uint8_t) ( ( x ) & 0xff ) ) -#define MBEDTLS_BYTE_1( x ) ( (uint8_t) ( ( ( x ) >> 8 ) & 0xff ) ) -#define MBEDTLS_BYTE_2( x ) ( (uint8_t) ( ( ( x ) >> 16 ) & 0xff ) ) -#define MBEDTLS_BYTE_3( x ) ( (uint8_t) ( ( ( x ) >> 24 ) & 0xff ) ) -#define MBEDTLS_BYTE_4( x ) ( (uint8_t) ( ( ( x ) >> 32 ) & 0xff ) ) -#define MBEDTLS_BYTE_5( x ) ( (uint8_t) ( ( ( x ) >> 40 ) & 0xff ) ) -#define MBEDTLS_BYTE_6( x ) ( (uint8_t) ( ( ( x ) >> 48 ) & 0xff ) ) -#define MBEDTLS_BYTE_7( x ) ( (uint8_t) ( ( ( x ) >> 56 ) & 0xff ) ) - /** - * Get the unsigned 32 bits integer corresponding to four bytes in - * big-endian order (MSB first). + * Perform a fast block XOR operation, such that + * r[i] = a[i] ^ b[i] where 0 <= i < n * - * \param data Base address of the memory to get the four bytes from. - * \param offset Offset from \p data of the first and most significant - * byte of the four bytes to build the 32 bits unsigned - * integer from. + * \param r Pointer to result (buffer of at least \p n bytes). \p r + * may be equal to either \p a or \p b, but behaviour when + * it overlaps in other ways is undefined. + * \param a Pointer to input (buffer of at least \p n bytes) + * \param b Pointer to input (buffer of at least \p n bytes) + * \param n Number of bytes to process. */ -#ifndef MBEDTLS_GET_UINT32_BE -#define MBEDTLS_GET_UINT32_BE( data , offset ) \ - ( \ - ( (uint32_t) ( data )[( offset ) ] << 24 ) \ - | ( (uint32_t) ( data )[( offset ) + 1] << 16 ) \ - | ( (uint32_t) ( data )[( offset ) + 2] << 8 ) \ - | ( (uint32_t) ( data )[( offset ) + 3] ) \ - ) +inline void mbedtls_xor(unsigned char *r, const unsigned char *a, const unsigned char *b, size_t n) +{ + size_t i = 0; +#if defined(MBEDTLS_EFFICIENT_UNALIGNED_ACCESS) +#if defined(__ARM_NEON) + for (; (i + 16) <= n; i += 16) { + uint8x16_t v1 = vld1q_u8(a + i); + uint8x16_t v2 = vld1q_u8(b + i); + uint8x16_t x = veorq_u8(v1, v2); + vst1q_u8(r + i, x); + } +#elif defined(__amd64__) || defined(__x86_64__) || defined(__aarch64__) + /* This codepath probably only makes sense on architectures with 64-bit registers */ + for (; (i + 8) <= n; i += 8) { + uint64_t x = mbedtls_get_unaligned_uint64(a + i) ^ mbedtls_get_unaligned_uint64(b + i); + mbedtls_put_unaligned_uint64(r + i, x); + } +#else + for (; (i + 4) <= n; i += 4) { + uint32_t x = mbedtls_get_unaligned_uint32(a + i) ^ mbedtls_get_unaligned_uint32(b + i); + mbedtls_put_unaligned_uint32(r + i, x); + } #endif - -/** - * Put in memory a 32 bits unsigned integer in big-endian order. - * - * \param n 32 bits unsigned integer to put in memory. - * \param data Base address of the memory where to put the 32 - * bits unsigned integer in. - * \param offset Offset from \p data where to put the most significant - * byte of the 32 bits unsigned integer \p n. - */ -#ifndef MBEDTLS_PUT_UINT32_BE -#define MBEDTLS_PUT_UINT32_BE( n, data, offset ) \ -{ \ - ( data )[( offset ) ] = MBEDTLS_BYTE_3( n ); \ - ( data )[( offset ) + 1] = MBEDTLS_BYTE_2( n ); \ - ( data )[( offset ) + 2] = MBEDTLS_BYTE_1( n ); \ - ( data )[( offset ) + 3] = MBEDTLS_BYTE_0( n ); \ -} #endif + for (; i < n; i++) { + r[i] = a[i] ^ b[i]; + } +} /** - * Get the unsigned 32 bits integer corresponding to four bytes in - * little-endian order (LSB first). + * Perform a fast block XOR operation, such that + * r[i] = a[i] ^ b[i] where 0 <= i < n * - * \param data Base address of the memory to get the four bytes from. - * \param offset Offset from \p data of the first and least significant - * byte of the four bytes to build the 32 bits unsigned - * integer from. - */ -#ifndef MBEDTLS_GET_UINT32_LE -#define MBEDTLS_GET_UINT32_LE( data, offset ) \ - ( \ - ( (uint32_t) ( data )[( offset ) ] ) \ - | ( (uint32_t) ( data )[( offset ) + 1] << 8 ) \ - | ( (uint32_t) ( data )[( offset ) + 2] << 16 ) \ - | ( (uint32_t) ( data )[( offset ) + 3] << 24 ) \ - ) -#endif - -/** - * Put in memory a 32 bits unsigned integer in little-endian order. + * In some situations, this can perform better than mbedtls_xor (e.g., it's about 5% + * better in AES-CBC). * - * \param n 32 bits unsigned integer to put in memory. - * \param data Base address of the memory where to put the 32 - * bits unsigned integer in. - * \param offset Offset from \p data where to put the least significant - * byte of the 32 bits unsigned integer \p n. + * \param r Pointer to result (buffer of at least \p n bytes). \p r + * may be equal to either \p a or \p b, but behaviour when + * it overlaps in other ways is undefined. + * \param a Pointer to input (buffer of at least \p n bytes) + * \param b Pointer to input (buffer of at least \p n bytes) + * \param n Number of bytes to process. */ -#ifndef MBEDTLS_PUT_UINT32_LE -#define MBEDTLS_PUT_UINT32_LE( n, data, offset ) \ -{ \ - ( data )[( offset ) ] = MBEDTLS_BYTE_0( n ); \ - ( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n ); \ - ( data )[( offset ) + 2] = MBEDTLS_BYTE_2( n ); \ - ( data )[( offset ) + 3] = MBEDTLS_BYTE_3( n ); \ -} +static inline void mbedtls_xor_no_simd(unsigned char *r, + const unsigned char *a, + const unsigned char *b, + size_t n) +{ + size_t i = 0; +#if defined(MBEDTLS_EFFICIENT_UNALIGNED_ACCESS) +#if defined(__amd64__) || defined(__x86_64__) || defined(__aarch64__) + /* This codepath probably only makes sense on architectures with 64-bit registers */ + for (; (i + 8) <= n; i += 8) { + uint64_t x = mbedtls_get_unaligned_uint64(a + i) ^ mbedtls_get_unaligned_uint64(b + i); + mbedtls_put_unaligned_uint64(r + i, x); + } +#else + for (; (i + 4) <= n; i += 4) { + uint32_t x = mbedtls_get_unaligned_uint32(a + i) ^ mbedtls_get_unaligned_uint32(b + i); + mbedtls_put_unaligned_uint32(r + i, x); + } #endif - -/** - * Get the unsigned 16 bits integer corresponding to two bytes in - * little-endian order (LSB first). - * - * \param data Base address of the memory to get the two bytes from. - * \param offset Offset from \p data of the first and least significant - * byte of the two bytes to build the 16 bits unsigned - * integer from. - */ -#ifndef MBEDTLS_GET_UINT16_LE -#define MBEDTLS_GET_UINT16_LE( data, offset ) \ - ( \ - ( (uint16_t) ( data )[( offset ) ] ) \ - | ( (uint16_t) ( data )[( offset ) + 1] << 8 ) \ - ) #endif - -/** - * Put in memory a 16 bits unsigned integer in little-endian order. - * - * \param n 16 bits unsigned integer to put in memory. - * \param data Base address of the memory where to put the 16 - * bits unsigned integer in. - * \param offset Offset from \p data where to put the least significant - * byte of the 16 bits unsigned integer \p n. - */ -#ifndef MBEDTLS_PUT_UINT16_LE -#define MBEDTLS_PUT_UINT16_LE( n, data, offset ) \ -{ \ - ( data )[( offset ) ] = MBEDTLS_BYTE_0( n ); \ - ( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n ); \ + for (; i < n; i++) { + r[i] = a[i] ^ b[i]; + } } -#endif -/** - * Get the unsigned 16 bits integer corresponding to two bytes in - * big-endian order (MSB first). - * - * \param data Base address of the memory to get the two bytes from. - * \param offset Offset from \p data of the first and most significant - * byte of the two bytes to build the 16 bits unsigned - * integer from. +/* Fix MSVC C99 compatible issue + * MSVC support __func__ from visual studio 2015( 1900 ) + * Use MSVC predefine macro to avoid name check fail. */ -#ifndef MBEDTLS_GET_UINT16_BE -#define MBEDTLS_GET_UINT16_BE( data, offset ) \ - ( \ - ( (uint16_t) ( data )[( offset ) ] << 8 ) \ - | ( (uint16_t) ( data )[( offset ) + 1] ) \ - ) +#if (defined(_MSC_VER) && (_MSC_VER <= 1900)) +#define /*no-check-names*/ __func__ __FUNCTION__ #endif -/** - * Put in memory a 16 bits unsigned integer in big-endian order. - * - * \param n 16 bits unsigned integer to put in memory. - * \param data Base address of the memory where to put the 16 - * bits unsigned integer in. - * \param offset Offset from \p data where to put the most significant - * byte of the 16 bits unsigned integer \p n. - */ -#ifndef MBEDTLS_PUT_UINT16_BE -#define MBEDTLS_PUT_UINT16_BE( n, data, offset ) \ -{ \ - ( data )[( offset ) ] = MBEDTLS_BYTE_1( n ); \ - ( data )[( offset ) + 1] = MBEDTLS_BYTE_0( n ); \ -} +/* Define `asm` for compilers which don't define it. */ +/* *INDENT-OFF* */ +#ifndef asm +#if defined(__IAR_SYSTEMS_ICC__) +#define asm __asm +#else +#define asm __asm__ #endif - -/** - * Get the unsigned 24 bits integer corresponding to three bytes in - * big-endian order (MSB first). - * - * \param data Base address of the memory to get the three bytes from. - * \param offset Offset from \p data of the first and most significant - * byte of the three bytes to build the 24 bits unsigned - * integer from. - */ -#ifndef MBEDTLS_GET_UINT24_BE -#define MBEDTLS_GET_UINT24_BE( data , offset ) \ - ( \ - ( (uint32_t) ( data )[( offset ) ] << 16 ) \ - | ( (uint32_t) ( data )[( offset ) + 1] << 8 ) \ - | ( (uint32_t) ( data )[( offset ) + 2] ) \ - ) #endif +/* *INDENT-ON* */ -/** - * Put in memory a 24 bits unsigned integer in big-endian order. +/* + * Define the constraint used for read-only pointer operands to aarch64 asm. * - * \param n 24 bits unsigned integer to put in memory. - * \param data Base address of the memory where to put the 24 - * bits unsigned integer in. - * \param offset Offset from \p data where to put the most significant - * byte of the 24 bits unsigned integer \p n. - */ -#ifndef MBEDTLS_PUT_UINT24_BE -#define MBEDTLS_PUT_UINT24_BE( n, data, offset ) \ -{ \ - ( data )[( offset ) ] = MBEDTLS_BYTE_2( n ); \ - ( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n ); \ - ( data )[( offset ) + 2] = MBEDTLS_BYTE_0( n ); \ -} -#endif - -/** - * Get the unsigned 24 bits integer corresponding to three bytes in - * little-endian order (LSB first). + * This is normally the usual "r", but for aarch64_32 (aka ILP32, + * as found in watchos), "p" is required to avoid warnings from clang. * - * \param data Base address of the memory to get the three bytes from. - * \param offset Offset from \p data of the first and least significant - * byte of the three bytes to build the 24 bits unsigned - * integer from. - */ -#ifndef MBEDTLS_GET_UINT24_LE -#define MBEDTLS_GET_UINT24_LE( data, offset ) \ - ( \ - ( (uint32_t) ( data )[( offset ) ] ) \ - | ( (uint32_t) ( data )[( offset ) + 1] << 8 ) \ - | ( (uint32_t) ( data )[( offset ) + 2] << 16 ) \ - ) -#endif - -/** - * Put in memory a 24 bits unsigned integer in little-endian order. + * Note that clang does not recognise '+p' or '=p', and armclang + * does not recognise 'p' at all. Therefore, to update a pointer from + * aarch64 assembly, it is necessary to use something like: * - * \param n 24 bits unsigned integer to put in memory. - * \param data Base address of the memory where to put the 24 - * bits unsigned integer in. - * \param offset Offset from \p data where to put the least significant - * byte of the 24 bits unsigned integer \p n. - */ -#ifndef MBEDTLS_PUT_UINT24_LE -#define MBEDTLS_PUT_UINT24_LE( n, data, offset ) \ -{ \ - ( data )[( offset ) ] = MBEDTLS_BYTE_0( n ); \ - ( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n ); \ - ( data )[( offset ) + 2] = MBEDTLS_BYTE_2( n ); \ -} -#endif - -/** - * Get the unsigned 64 bits integer corresponding to eight bytes in - * big-endian order (MSB first). + * uintptr_t uptr = (uintptr_t) ptr; + * asm( "ldr x4, [%x0], #8" ... : "+r" (uptr) : : ) + * ptr = (void*) uptr; * - * \param data Base address of the memory to get the eight bytes from. - * \param offset Offset from \p data of the first and most significant - * byte of the eight bytes to build the 64 bits unsigned - * integer from. + * Note that the "x" in "%x0" is neccessary; writing "%0" will cause warnings. */ -#ifndef MBEDTLS_GET_UINT64_BE -#define MBEDTLS_GET_UINT64_BE( data, offset ) \ - ( \ - ( (uint64_t) ( data )[( offset ) ] << 56 ) \ - | ( (uint64_t) ( data )[( offset ) + 1] << 48 ) \ - | ( (uint64_t) ( data )[( offset ) + 2] << 40 ) \ - | ( (uint64_t) ( data )[( offset ) + 3] << 32 ) \ - | ( (uint64_t) ( data )[( offset ) + 4] << 24 ) \ - | ( (uint64_t) ( data )[( offset ) + 5] << 16 ) \ - | ( (uint64_t) ( data )[( offset ) + 6] << 8 ) \ - | ( (uint64_t) ( data )[( offset ) + 7] ) \ - ) +#if defined(__aarch64__) && defined(MBEDTLS_HAVE_ASM) +#if UINTPTR_MAX == 0xfffffffful +/* ILP32: Specify the pointer operand slightly differently, as per #7787. */ +#define MBEDTLS_ASM_AARCH64_PTR_CONSTRAINT "p" +#elif UINTPTR_MAX == 0xfffffffffffffffful +/* Normal case (64-bit pointers): use "r" as the constraint for pointer operands to asm */ +#define MBEDTLS_ASM_AARCH64_PTR_CONSTRAINT "r" +#else +#error "Unrecognised pointer size for aarch64" +#endif #endif -/** - * Put in memory a 64 bits unsigned integer in big-endian order. - * - * \param n 64 bits unsigned integer to put in memory. - * \param data Base address of the memory where to put the 64 - * bits unsigned integer in. - * \param offset Offset from \p data where to put the most significant - * byte of the 64 bits unsigned integer \p n. +/* Always provide a static assert macro, so it can be used unconditionally. + * It will expand to nothing on some systems. + * Can be used outside functions (but don't add a trailing ';' in that case: + * the semicolon is included here to avoid triggering -Wextra-semi when + * MBEDTLS_STATIC_ASSERT() expands to nothing). + * Can't use the C11-style `defined(static_assert)` on FreeBSD, since it + * defines static_assert even with -std=c99, but then complains about it. */ -#ifndef MBEDTLS_PUT_UINT64_BE -#define MBEDTLS_PUT_UINT64_BE( n, data, offset ) \ -{ \ - ( data )[( offset ) ] = MBEDTLS_BYTE_7( n ); \ - ( data )[( offset ) + 1] = MBEDTLS_BYTE_6( n ); \ - ( data )[( offset ) + 2] = MBEDTLS_BYTE_5( n ); \ - ( data )[( offset ) + 3] = MBEDTLS_BYTE_4( n ); \ - ( data )[( offset ) + 4] = MBEDTLS_BYTE_3( n ); \ - ( data )[( offset ) + 5] = MBEDTLS_BYTE_2( n ); \ - ( data )[( offset ) + 6] = MBEDTLS_BYTE_1( n ); \ - ( data )[( offset ) + 7] = MBEDTLS_BYTE_0( n ); \ -} +#if defined(static_assert) && !defined(__FreeBSD__) +#define MBEDTLS_STATIC_ASSERT(expr, msg) static_assert(expr, msg); +#else +#define MBEDTLS_STATIC_ASSERT(expr, msg) #endif -/** - * Get the unsigned 64 bits integer corresponding to eight bytes in - * little-endian order (LSB first). - * - * \param data Base address of the memory to get the eight bytes from. - * \param offset Offset from \p data of the first and least significant - * byte of the eight bytes to build the 64 bits unsigned - * integer from. - */ -#ifndef MBEDTLS_GET_UINT64_LE -#define MBEDTLS_GET_UINT64_LE( data, offset ) \ - ( \ - ( (uint64_t) ( data )[( offset ) + 7] << 56 ) \ - | ( (uint64_t) ( data )[( offset ) + 6] << 48 ) \ - | ( (uint64_t) ( data )[( offset ) + 5] << 40 ) \ - | ( (uint64_t) ( data )[( offset ) + 4] << 32 ) \ - | ( (uint64_t) ( data )[( offset ) + 3] << 24 ) \ - | ( (uint64_t) ( data )[( offset ) + 2] << 16 ) \ - | ( (uint64_t) ( data )[( offset ) + 1] << 8 ) \ - | ( (uint64_t) ( data )[( offset ) ] ) \ - ) +/* Define compiler branch hints */ +#if defined(__has_builtin) +#if __has_builtin(__builtin_expect) +#define MBEDTLS_LIKELY(x) __builtin_expect(!!(x), 1) +#define MBEDTLS_UNLIKELY(x) __builtin_expect(!!(x), 0) +#endif +#endif +#if !defined(MBEDTLS_LIKELY) +#define MBEDTLS_LIKELY(x) x +#define MBEDTLS_UNLIKELY(x) x #endif -/** - * Put in memory a 64 bits unsigned integer in little-endian order. - * - * \param n 64 bits unsigned integer to put in memory. - * \param data Base address of the memory where to put the 64 - * bits unsigned integer in. - * \param offset Offset from \p data where to put the least significant - * byte of the 64 bits unsigned integer \p n. - */ -#ifndef MBEDTLS_PUT_UINT64_LE -#define MBEDTLS_PUT_UINT64_LE( n, data, offset ) \ -{ \ - ( data )[( offset ) ] = MBEDTLS_BYTE_0( n ); \ - ( data )[( offset ) + 1] = MBEDTLS_BYTE_1( n ); \ - ( data )[( offset ) + 2] = MBEDTLS_BYTE_2( n ); \ - ( data )[( offset ) + 3] = MBEDTLS_BYTE_3( n ); \ - ( data )[( offset ) + 4] = MBEDTLS_BYTE_4( n ); \ - ( data )[( offset ) + 5] = MBEDTLS_BYTE_5( n ); \ - ( data )[( offset ) + 6] = MBEDTLS_BYTE_6( n ); \ - ( data )[( offset ) + 7] = MBEDTLS_BYTE_7( n ); \ -} +#if defined(__GNUC__) && !defined(__ARMCC_VERSION) && !defined(__clang__) \ + && !defined(__llvm__) && !defined(__INTEL_COMPILER) +/* Defined if the compiler really is gcc and not clang, etc */ +#define MBEDTLS_COMPILER_IS_GCC #endif -/* Fix MSVC C99 compatible issue - * MSVC support __func__ from visual studio 2015( 1900 ) - * Use MSVC predefine macro to avoid name check fail. +/* For gcc -Os, override with -O2 for a given function. + * + * This will not affect behaviour for other optimisation settings, e.g. -O0. */ -#if (defined(_MSC_VER) && ( _MSC_VER <= 1900 )) -#define /*no-check-names*/ __func__ __FUNCTION__ +#if defined(MBEDTLS_COMPILER_IS_GCC) && defined(__OPTIMIZE_SIZE__) +#define MBEDTLS_OPTIMIZE_FOR_PERFORMANCE __attribute__((optimize("-O2"))) +#else +#define MBEDTLS_OPTIMIZE_FOR_PERFORMANCE #endif #endif /* MBEDTLS_LIBRARY_COMMON_H */ |