On Wed, 23 Feb 2000, Erik Bertelsen wrote:

> since last week-end (Friday's (I think) or Saturday's sup) I've seen my 5000/133
> hang while building NetBSD after a few hour's uptime.
> 
> The reset-button is not operative, resulting in having to powercycle the
> machine. No console messages to tell anything about the problem, just a solid
> hanging.
> 
> I have -not- activated the new MI scsi driver (and I think that this problem
> started the day before the integration of the MI scsi driver anyway).
> 
> Any explanation ?

  Yes - some changes to locore_mips1.S resulted in the possibility of a
register containing the exception PC to be clobbered, with the result that
the exception exit returning to random locations.  I've verified this on
my 5000/25, and have committed a fix.

  There's the possibility of the same problem in locore_mips3.S, but I
have not had the chance to verify that yet.

--
Michael L. Hitch			mhitch@montana.edu
Computer Consultant
Information Technology Center
Montana State University	Bozeman, MT	USA