kgdb

[Palle Lyckegaard <palle%netbsd.org@localhost>]

Hello.

What is the current state of kgdb in the sparc64 port (or in general)?

Has anyone tried to use it recently?

I would like to use the functionality for debugging the sparc64/sun4v 
issues that currently are present in the codebase.
This would make use for the com driver.

I have few changes pending (mostly related to the zs driver), but would 
like to hear what others think before I commit the changes (only changes 
that fix building for sparc64 when KGDB is defined).
The zs driver seems to relevant for Ultra 1 and Ultra 2 systems (unsure if 
other systems may use zs as well).

Regards
Palle