CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c

   1 /** @file
   2   Intrinsic Memory Routines Wrapper Implementation for OpenSSL-based
   3   Cryptographic Library.
   4
   5 Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>
   6 This program and the accompanying materials
   7 are licensed and made available under the terms and conditions of the BSD License
   8 which accompanies this distribution.  The full text of the license may be found at
   9 http://opensource.org/licenses/bsd-license.php
  10
  11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include <Base.h>
  17 #include <Library/BaseMemoryLib.h>
  18 #include <Library/BaseLib.h>
  19
  20 /* OpenSSL will use floating point support, and C compiler produces the _fltused
  21    symbol by default. Simply define this symbol here to satisfy the linker. */
  22 int _fltused = 1;
  23
  24 /* Sets buffers to a specified character */
  25 void * memset (void *dest, char ch, unsigned int count)
  26 {
  27   //
  28   // NOTE: Here we use one base implementation for memset, instead of the direct
  29   //       optimized SetMem() wrapper. Because the IntrinsicLib has to be built
  30   //       without whole program optimization option, and there will be some
  31   //       potential register usage errors when calling other optimized codes.
  32   //
  33
  34   //
  35   // Declare the local variables that actually move the data elements as
  36   // volatile to prevent the optimizer from replacing this function with
  37   // the intrinsic memset()
  38   //
  39   volatile UINT8  *Pointer;
  40
  41   Pointer = (UINT8 *)dest;
  42   while (count-- != 0) {
  43     *(Pointer++) = ch;
  44   }
  45
  46   return dest;
  47 }
  48
  49 int strcmp (const char *s1, const char *s2)
  50 {
  51   return (int)AsciiStrCmp(s1, s2);
  52 }