Re: NetBSD on Sun T5220

On Fri, 10 Oct 2025 18:56:26 +0000 (UTC)
Palle Lyckegaard <[email protected]> wrote:

> Thank you for testing - you are right that the provided patch is not 
> solving the issue - I have something that looks like a regression with 
> my -current based setup, so I'm back at looking at the code in locore.s 
> again... :-)
> 

Hello,

What makes you think the problem could be with the spill/fill trap
handlers? Looking at the architecture documents, there doesn't seem to
be much difference between how sun4u and sun4v handle window spill/fill
traps.

In fact, I have replaced all window traps in sun4v trap table for the
sun4u traps and I can now boot into single user mode with the
-current /bin/sh. If I run further shell scripts then the kernel just
hangs, so the issue is still there, but I'm not sure it has much to do
with the window trap handlers.