amd64 lacks ptrace support:
% gdb gdb/gdb
GNU gdb 6.7.1
Copyright (C) 2007 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "amd64-dragonfly"...
(gdb) r
Starting program: /home/corecode/gdb-7.0/gdb/gdb
Couldn't get registers: No such process.
(gdb)
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