Gathering Hardware State During a Driver Initiated Kernel Panic

[David Christensen]

Is there a method or callback in FreeBSD where a driver can 
be notified that it has caused a kernel panic in order to 
generate a dump of internal hardware state information?  I've
written a sysctl call for manual intervention and can handle
some "expected" hardware events completely in the driver but
I don't know of a way to get control again in cases where the 
driver wasn't expecting a failure.

Dave