hi. i'd been wanting to get this working for a while, and i've finally gotten this to the point it works properly:
http://www.netbsd.org/~mrg/scdebug_kernhist.diff
it's kind of ugly due to the limitations of kernhist, but it already
has proven useful to me, and the ugliness is limited to kern_xxx.c.
i plan to commit this sometime soon. reviews most welcome.
.mrg.
