Add arm-symbianelf support.

[Daniel Jacobowitz]

On Thu, Feb 25, 2010 at 08:06:50PM +0000, Pedro Alves wrote:
> This patch of Daniel's adds basic support for arm-symbianelf
> to gdb.
> 
> Daniel, do you think the arm_symbian_osabi_sniffer is
> still sufficiently tight to not cause problems in
> --enable-target=all builds?  Otherwise, this looks
> good to me.  :-)

Yes, I think this is still safe.  It's not obvious from the commands,
but the key is ET_DYN with the program headers not mapped; ET_EXEC
without mapped headers is common (bare metal applications are usually
like this).

I wish there were a better marker.  Maybe there is nowadays?

-- 
Daniel Jacobowitz
CodeSourcery