!. A simple reply of "OK" indicates the target will support extended remote debugging.

D. The detach is acknowledged with a reply packet of "OK" before the client connection is closed and rsp.client_fd set to -1. The semantics of detach require the target to resume execution, so the processor is unstalled using set_stall_state (0).

H. This sets the thread number of subsequent operations. Since thread numbers are of no relevance to this target, a response of "OK" is always acceptable.

k. The kill request is used in extended mode before a restart or request to run a new program (vRun packet). Since the CPU is already stalled, it seems to have no additional semantic meaning. Since it requires no reply it can be silently ignored.

T. Since this is a bare level target, there is no concept of separate threads. The one thread is always active, so a reply of "OK" is always acceptable.