On Thu, Jan 03, 2002 at 02:52:16 -0800, Simon J. Gerraty wrote:

> This is an SS20 with serial console.
> Once the kernel has started booting though, BREAK is ignored.
> My normal kernel does not have either of DDB or KGDB defined.
> 
> suggests that zs is being used for the console.  Here I see zs_abort()
> which looks like it should end up calling prom_abort, but I don't see
> where zs_abort is hooked in.

On Thu, Jan 03, 2002 at 08:51:43 -0600, Ron Roskens wrote:

> A new method for catching a "break" signal was added in -current.
> 
> man cnmagic

cnmagic calls console_debugger when triggered (that's the default for
cn_trap macro it uses).  In a kernel w/out DDB/KGDB it's just a no-op.

Perhaps for sparc, where we always have a PROM to break into, we
should just drop into PROM in that case (like sun2 and sun3 do -
cf. sys/systm.h).

SY, Uwe
-- 
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