>I'm having some trouble getting the ktrace command to work in 1.0.
>I've added `options KTRACE' to my config file and recompiled, and
>ktrace.o seems to be included in the kernel, but I get a core dump
>due to an "invalid system call." I recompiled ktrace, ran it again,
>did a stack backtrace in gdb, and found that it is indeed the
>ktrace() system call that it's blowing up on.

ktrace has some other dependancies in the kernel.  did you do a "make clean"
before you built a new kernel?

--Ken