title: Specify file to read for memory region in GDB?
body: <p>I'm using gdb for arm in Linux.</p>
  
  <p>I want to read memory region from file, not read from target. It looks like read target description via <code>set tdesc filename PATH</code>. I found out the function <code>static void require_user_regions (int from_tty)</code> in <code>memattr.c</code> but I don't know how to use it.</p>
  
  <p>Please let me know if you have any suggestion.</p>