Hi,

x86_64 defaults (by bfd matching) to target "i386" instead of its native
"i386:x86_64".  Therefore if you connect to gdbserver(1) without any `file' or
`set architecture' command before the communication will crash on a different
expected register sizes.

As implementing architecture negotiation is complicated due to gdbserver(1) not
being aware of bfd-compatible name of its target and also it may be also
unclear to automatically change the target while working remotely it is just
suggesting to double-check which architecture you are using.


(gdb) target remote localhost:1234
Remote debugging using localhost:1234
Remote debugging from host 127.0.0.1
Remote register badly formatted: T0506:0000000000000000;07:40daffbf7f000000;10:506b55952a000000;
readchar: Got EOF
here: 0000000;07:40daffbf7f000000;10:506b55952a000000;
Try to load the executable by `file' first,
you may also check `set/show architecture'.
(gdb) Remote side has terminated connection.  GDBserver will reopen the connection.
Listening on port 1234



Regards,
Jan