Re: NetBSD on Sun T5220

On Wed, 8 Oct 2025 19:29:59 +0000 (UTC)
Palle Lyckegaard <[email protected]> wrote:

> On Tue, 7 Oct 2025, Sad Clouds wrote:
> 
> >
> > Hello, thanks for that. Unfortunately the patch does not seem to improve
> > things much. It still boots into single user mode with the /bin/sh from
> > NetBSD-9.4 but crashes very quickly.
> 
> So with the patch you get a bit further or not?
> 
> Can you try with all-current code?
> Mixing code makes it hard to figure out what the issue is.
> 
> I'm convinced that the issue is within the kernel code and not the 
> userspace code, so no reason to use the 9.4 /bin/sh
> 
> 

This is what I get with -current /bin/sh and your patch:

...
[  10.2521573] init path (default /sbin/init): 
[  10.2827453] init: copying out flags `-s' 3
[  10.2827453] init: copying out path `/sbin/init' 11
[  10.2827453] entropy: best effort
Enter pathname of shell or RETURN for /bin/sh: 
[  50.1619768] Alignment error: pid=31.31 comm=sh pc=4099a12c
[  50.1619768] dfa = 00000000e0002000
[  50.1619768] dfc = 0000000000000000
[  50.1619768] pid 31 (sh), uid 0: exited on signal 10 (core not
dumped, err = 30)

It doesn't get as far as a single user mode. I think the patch made
things a bit worse, since the kernel now hangs and doesn't even drop
into debugger.

If the issue is confined to the kernel then the older /bin/sh
binary should not make any difference as it still complies with V9 ABI
and should be backward compatible with NetBSD system libraries.

It's a bit easier to debug in single user mode.