tree 98e49fdc15e9db7eb45e91571ca6187f9a5cf516
parent 1396a21ba0d4ec381db19bc9cd5b6f25a89cf633
author Jason Wessel <jason.wessel@windriver.com> 1279758425 -0500
committer Jason Wessel <jason.wessel@windriver.com> 1279758425 -0500

repair gdbstub to match the gdbserial protocol specification

The gdbserial protocol handler should return an empty packet instead
of an error string when ever it responds to a command it does not
implement.

The problem cases come from a debugger client sending
qTBuffer, qTStatus, qSearch, qSupported.

The incorrect response from the gdbstub leads the debugger clients to
not function correctly.  Recent versions of gdb will not detach correctly as a result of this behavior.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>