title: redirection for gdb commands
body: <p>How I can redirect output of this command :</p>
  
  <p>(gdb) x /a $esp
  0x22ff30:       0x403064 &lt;__register_frame_info+4206692></p>
  
  <p>to make this:</p>
  
  <p>(gdb) x /s 0x00403064
  0x403064 &lt;__register_frame_info+4206692>:        "\nPress key (q for exit) ?    "</p>
  
  <p>(gdb)</p>
  
  <p>I mean something like:
  (x /a $esp) | (x /s)</p>