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

[Stephen Sanders]

I've not tried this under 7.x yet but do plan on doing so within the
next few weeks or so.

Unfortunately, I'm sort of stuck with this 6.3 32 bit/64 bit 
arrangement for the next 6 months or more as we've a number of systems
deployed.

Thanks for the reply.

John Baldwin wrote:
> 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.
>
>