> I've run into a situation on 1.5S where my VS4000/60 is panicing at
> seemingly random place.  I've been attempting to build a new kernel,
> but I'm unable to make it though more than 15 or 20 file compilations
> before the panic hits with:
> 
> 	panic: kernel stack invalid
> 	syncing disks... Trap: type 2, code 0, pc 80000457, psl 4080000
> 	panic: trap
> 
> 	dumping to dev 20,9 offset 17152
> 	dump succeeded
> 
>   	83 BOOT SYS

I've succeeded in building a GENERIC kernel with ddb.  However, I can't
exctract anything useful via ddb:

	panic: kernel stack invalid
	Stopped in pid 311 (cc) at      _trap+0x138:    tstl    64(r8)
	db> trace
	panic: kernel stack invalid
	Stack traceback :
	0x802af734: _trap+0x138(0x86a46e9c)

This problem does not occur on my hp300, i386 and sparc platforms.

How should I pursue this problem from here?

Thanks,
-scott