Subject: Re: bug#58320: Hurd VM fails to boot on AMD EPYC (kvm-amd)

From: Samuel Thibault <[email-masked]>
Date: Fri, 7 Oct 2022 00:42:19 +0200

Ludovic Courtès, le ven. 07 oct. 2022 00:10:15 +0200, a ecrit:
> Samuel Thibault <[email-masked]> skribis:
> 
> > Ludovic Courtès, le jeu. 06 oct. 2022 15:14:13 +0200, a ecrit:
> >> such that it would stop on each trap, hopefully allowing me to see why
> >> exec is not starting.
> >
> > Also, better use exec.static to have static addresses.
> 
> Thanks for the hint.
> 
> Of course, the thing boots just fine on that machine when using
> ‘exec.static’.

Uh. At least you have a workaround :)

> So the issue might be somewhere in ld.so, or triggered by ld.so.
> Any debugging tricks here?

maybe for a start check with 

show map $map2

what is actually mapped, whether it's just ld.so, or also exec, etc.

Perhaps you can also try to run other programs than exec, like small
dumb programs.

Samuel