/** @file | |
Intrinsic Memory Routines Wrapper Implementation for OpenSSL-based | |
Cryptographic Library. | |
Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#include <Base.h> | |
#include <Library/BaseMemoryLib.h> | |
#include <Library/BaseLib.h> | |
typedef UINTN size_t; | |
#if defined (__GNUC__) || defined (__clang__) | |
#define GLOBAL_USED __attribute__((used)) | |
#else | |
#define GLOBAL_USED | |
#endif | |
/* OpenSSL will use floating point support, and C compiler produces the _fltused | |
symbol by default. Simply define this symbol here to satisfy the linker. */ | |
int GLOBAL_USED _fltused = 1; | |
/* Sets buffers to a specified character */ | |
void * | |
memset ( | |
void *dest, | |
int ch, | |
size_t count | |
) | |
{ | |
// | |
// NOTE: Here we use one base implementation for memset, instead of the direct | |
// optimized SetMem() wrapper. Because the IntrinsicLib has to be built | |
// without whole program optimization option, and there will be some | |
// potential register usage errors when calling other optimized codes. | |
// | |
// | |
// Declare the local variables that actually move the data elements as | |
// volatile to prevent the optimizer from replacing this function with | |
// the intrinsic memset() | |
// | |
volatile UINT8 *Pointer; | |
Pointer = (UINT8 *)dest; | |
while (count-- != 0) { | |
*(Pointer++) = (UINT8)ch; | |
} | |
return dest; | |
} | |
/* Compare bytes in two buffers. */ | |
int | |
memcmp ( | |
const void *buf1, | |
const void *buf2, | |
size_t count | |
) | |
{ | |
return (int)CompareMem (buf1, buf2, count); | |
} |