1    :  // Copyright 2014 Google Inc. All Rights Reserved.
   2    :  //
   3    :  // Licensed under the Apache License, Version 2.0 (the "License");
   4    :  // you may not use this file except in compliance with the License.
   5    :  // You may obtain a copy of the License at
   6    :  //
   7    :  //     http://www.apache.org/licenses/LICENSE-2.0
   8    :  //
   9    :  // Unless required by applicable law or agreed to in writing, software
  10    :  // distributed under the License is distributed on an "AS IS" BASIS,
  11    :  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12    :  // See the License for the specific language governing permissions and
  13    :  // limitations under the License.
  14    :  
  15    :  #include "syzygy/agent/common/agent.h"
  16    :  
  17    :  #include <math.h>
  18    :  
  19    :  namespace agent {
  20    :  namespace common {
  21    :  
  22    :  // This is to ensure that we have our own version of the CRT so as not to
  23    :  // conflict with instrumented code.
  24    :  #ifdef _DLL
  25    :  #error Must be statically linked to the CRT.
  26    :  #endif
  27    :  
  28  E :  void InitializeCrt() {
  29    :    // Disable SSE2 instructions. This is to ensure that our instrumentation
  30    :    // doesn't inadvertently tinker with SSE2 registers via the CRT, causing
  31    :    // instrumented SSE2 enabled instructions to screw up.
  32  E :    const int kDisableSSE2 = 0;
  33  E :    _set_SSE2_enable(kDisableSSE2);
  34  E :  }
  35    :  
  36    :  }  // namespace common
  37    :  }  // namespace agent