Re: cannot set up LDT for thread-local storage

[John Hayward <John.C.Hayward%wheaton.edu@localhost>]

> I found pr 33487.
> This was for dom0 i386 for NetBSD 3.99.19.
>
> I have been running a version of firefox-linux on a dom0 i386 NetBSD-4.0 
> without problem.  Maybe I was just lucky.
Here is additional info
Xen 3.0 i386  dom0 NetBSD-4.0  i386 dom0 firefox-linux-2 works
Xen 3.3 amd64 dom0 NetBSD-4.99 i386 domu firefox-linux-2 works
Xen 3.3 amd64 dom0 NetBSD-4.99 i386 domu firefox-linux-3 causes panic
       (with LDT option on)

> Is there another pr which has this issue?
>
> johnh...
> On Thu, 2 Oct 2008, Manuel Bouyer wrote:
>
> > Date: Thu, 2 Oct 2008 20:06:32 +0200
> > From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
> > To: John Hayward <John.C.Hayward%wheaton.edu@localhost>
> > Cc: Thor Lancelot Simon <tls%rek.tjls.com@localhost>, 
> > port-xen%NetBSD.org@localhost
> > Subject: Re: cannot set up LDT for thread-local storage
> >
> > On Thu, Oct 02, 2008 at 11:20:42AM -0500, John Hayward wrote:
> > > > On Wed, Oct 01, 2008 at 08:36:43PM -0500, John Hayward wrote:
> > > > > Dear Xen people,
> > > > >   I have amd64 dom0 - xen 3.3 current as of about 9/27.
> > > > >   I have created two i386 domu - one NetBSD-4.0 and one NetBSD-4.99
> > > > > both
> > > > > using netbsd-XEN3PAE_DOMU from 4.99 as of about 9/27 - both domu 
> > > > > installed
> > > > > fine.
> > > > >   I have installed a firefox-bin-3.0.2 binary package or build from
> > > > > pkgsrc - it seems to install fine.  When I run I get:
> > > > >
> > > > > cannot set up thread-local storage: cannot set up LDT for thread-local
> > > > > storage
> > > > >
> > > > >   Is this a limitation of NetBSD linux emulation under Xen domu?
> > > >
> > > > Do you have kernel options USER_LDT?
> > > I was using the daily kernel netbsd-XEN3PAE_DOMU from 4.99 as of about 
> > > 9/27
> > >
> > > In looking at the config for this kernel it had USER_LDT commented out (in
> > > included XEN2_DOMU).  I added that option and built a kernel - rebooted
> > > with new kernel.  When I attempt to start firefox-linux I now get:
> > > ====
> > > panic: gdt_get_slot botch 1
> > > fatal breakpoint trap in supervisor mode
> > > trap type 1 code 0 eip c038ceac cs 9 eflags 246 cr2 bac9a000 ilevel 0
> > > Stopped in pid 429.1 (firefox-bin) at   netbsd:breakpoint+0x4:  popl
> > > %ebp
> > > db>
> > > ====
> >
> > That's why it's commented out :)
> > this is a known issue; and there's a PR open about it ...
> >
> > --
> > Manuel Bouyer <bouyer%antioche.eu.org@localhost>
> >     NetBSD: 26 ans d'experience feront toujours la difference
> > --