Re: Tracing NetBSD sun4v issues

[Palle Lyckegaard <palle%netbsd.org@localhost>]

On Sat, 10 Oct 2026, Sad Clouds wrote:

> Attached. You need to build it with -O0 to stop compiler from
> optimising away some code. Depending on how much stack space is used by
> the variables in main() I get sigsegv or sigbus.

Thanks - will try to reproduce in qemu and on real hw as well.

> Not yet, I assume the same problem exists in both, unless someone fixed
> it and forget to tell everyone else.

I fixed an issue with spilling register window contents about a year ago 
(locore.s rev. 1.438).
This fix is not present in the NetBSD-11 branch and other fixes may be 
missing as well.
So tracking the NetBSD main branch is the way to go I think.

Regards
Palle