text: /*BEGIN_LEGAL 
  Intel Open Source License 
  
  Copyright (c) 2002-2013 Intel Corporation. All rights reserved.
   
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  Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.  Redistributions
  in binary form must reproduce the above copyright notice, this list of
  conditions and the following disclaimer in the documentation and/or
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  the Intel Corporation nor the names of its contributors may be used to
  endorse or promote products derived from this software without
  specific prior written permission.
   
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  END_LEGAL */
  /*
  This tests the ability to handle the [REG_INST_PTR] memory operand (instruction pointer is base register
  and no offset or index register). Also the ability to get the register value of the REG_INST_PTR
  */
  
  #include <assert.h>
  #include <stdio.h>
  #include <string.h>
  
  #if defined(__cplusplus)
  extern "C"
  #endif
  void TestIpRead ();
  #if defined(__cplusplus)
  extern "C"
  #endif
  void TestIpWrite ();
  #if defined(__cplusplus)
  extern "C"
  #endif
  void Dummy ();
  
  typedef void (*MY_FUNC_PTR)(void); 
  typedef union
  {
      MY_FUNC_PTR codePtr;
      char * dataPtr;
  } MY_FUNC_PTR_CAST;
  
  const size_t MAX_FUNC_SIZE = 8192;
  /*!
   * Return size of the specified (foo or bar) routine
   */
  size_t FuncSize(MY_FUNC_PTR func, MY_FUNC_PTR funcEnd)
  {
      MY_FUNC_PTR_CAST cast;
  
      cast.codePtr = func;
      const char * start = cast.dataPtr;
  
      cast.codePtr = funcEnd;
      const char * end = cast.dataPtr;
  
      assert(end > start);
      assert(end - start <= MAX_FUNC_SIZE);
      return end - start;
  }
  
  /*!
   * Copy the TestIpWrite routine into a data buffer - because it contains a 
     mov [ip], 0x90
     and this write will cause an access violation if executed in the code segment
   */
  void CopyAndExecuteTestIpWrite()
  {
      static char staticBuffer[MAX_FUNC_SIZE];
  
      size_t size;
      size = FuncSize(TestIpWrite, Dummy);
      
  
      MY_FUNC_PTR_CAST cast;
  
      cast.codePtr = TestIpWrite;
      const void * funcAddr = cast.dataPtr;
      memcpy(staticBuffer, funcAddr, size);
  
      cast.dataPtr = static_cast<char *>(staticBuffer);
      MY_FUNC_PTR funcCopy = cast.codePtr;
      funcCopy();
  }
  
  int main(int argc, char *argv[])
  {
      TestIpRead();
      CopyAndExecuteTestIpWrite();
      return 0;
  }
  