title: Anyone knows what "mov edi,edi " does?
body: <pre><code>69A8AB13  int         3    
  69A8AB14  int         3    
  69A8AB15  mov         edi,edi 
  69A8AB17  push        ebp  
  69A8AB18  mov         ebp,esp 
  </code></pre>
  
  <p><code>mov         edi,edi</code>  doesn't make sense for me,what's it for?</p>