amd64/134757: 32 bit processes on 64 bit platforms occasionally drop core with bad ds reg

[John Baldwin]

On Wednesday 20 May 2009 11:52:45 am Stephen Sanders wrote:
> 
> >Number:         134757
> >Category:       amd64
> >Synopsis:       32 bit processes on 64 bit platforms occasionally drop core 
with bad  ds reg
> >Confidential:   no
> >Severity:       non-critical
> >Priority:       medium
> >Responsible:    freebsd-amd64
> >State:          open
> >Quarter:        
> >Keywords:       
> >Date-Required:
> >Class:          sw-bug
> >Submitter-Id:   current-users
> >Arrival-Date:   Wed May 20 16:00:12 UTC 2009
> >Closed-Date:
> >Last-Modified:
> >Originator:     Stephen Sanders
> >Release:        6.3 Release amd64
> >Organization:
> OPNET
> >Environment:
> FreeBSD alt-4100-2.lab.opnet.com 6.3-RELEASE FreeBSD 6.3-RELEASE #0: Tue Mar 
31 14:11:07 PDT 2009     
pmai at focus7.networkphysics.com:/u1/builds/ping/NP/FreeBSD/package/NPbabkernel/bld-tmp/sys/amd64/compile/NPBAB  
amd64
> >Description:
> With fair regularity, we have 32 bit processes dropping core on 64 bit 
systems.  In particular perl and bash.
> 
> Our system is definitely a hybrid but that aspect appears to not be the 
issue.  The system works properly more than not.
> 
> I have attached a file containing 2 gdb sessions. One session is looking at 
a core that bash left behind and the other is looking at a bash session with 
no core.

Have you tested this on 7 at all?  At this point most developers are probably 
much more inclined to fix this for 8.0 and 7.x rather than 6.x.

-- 
John Baldwin