Michael Snyder wrote:
> This patch adds support to gdbserver for the "qCRC:" request.
> 
> This in turn supports the gdb "compare-sections" command, which
> basically lets you verify that the binary image on the target
> matches the executable that you're debugging.
> 
> I borrowed code from gdb/remote.c, I assume that's OK.

Fixed a "fixme" comment, now will return "E01" if the request
tries to read memory that isn't there.

Revised patch attached.