Re: [Xenomai-help] Floating Point Exceptions in RT-Tasks

[Philippe Gerum <rpm@xenomai.org>]

roderik.wildenburg@domain.hid wrote:
> On behalf of Thomas I would like to answer your question :
> 
> We too use Eldk 3.1.1 with a libc-2.3.1.so (from the Eldk 3.1.1 rootfs) and an adeos-ipipe-2.4.25-ppc-DENX-1.2-02.patch.
> 
> We do not use Eldk´s rootfs completely, as our system is busybox based, but many parts form it (for example the libraries and bash). Do you know anything else, we have to activate/keep care of to get FPU-exceptions ? From my point of view everything should be configured all right, as we get exceptions when the thread switches to secondary mode!??
>

Please send your kernel .config file, and the output of the ldd command against
the small fesetenv test we have been trying lately on different setups.

TIA,

> Dr. Grandegger : could you be so kind to try Thomas´ testprogram on our plattfrom with Eldk 3.1.1?
> 
> Many thanks in advance for your help
> Roderik
> 
>> -----Ursprüngliche Nachricht-----
>> Von: xenomai-help-bounces@domain.hid
>> [mailto:xenomai-help-bounces@domain.hid] Im Auftrag von Philippe Gerum
>> Gesendet: Donnerstag, 19. Februar 2009 16:20
>> An: Debes, Thomas RAEK3 MRA
>> Cc: xenomai@xenomai.org
>> Betreff: Re: [Xenomai-help] Floating Point Exceptions in RT-Tasks
>>
>> Philippe Gerum wrote:
>>> thomas.debes@domain.hid wrote:
>>>> Thanks for testing it - that is exactly what I would like 
>> to see. Obviously it's a kernel/I-Pipe related thing which 
>> prevents me from getting the exception. Unfortunately 
>> updating to kernel 2.6 is not an option for now.
>>> I'm afraid this is not I-pipe related, this would have been 
>> too easy. The test
>>> snippet works fine here as well on a lite5200 + 
>> ipipe-2.4.25-1.2-02, ELDK-4.1
>>> environment.
>>>
>>> Now we should suspect something going on with your target 
>> environment; which
>>> libc are you based on?
>>>
>> Works fine with ELDK-3.1.1 rootfs as well.
>>
>>>> Thomas
>>>>
>>>> -----Ursprüngliche Nachricht-----
>>>> Von: Wolfgang Grandegger [mailto:wg@domain.hid
>>>> Gesendet: Mittwoch, 18. Februar 2009 19:59
>>>> An: Debes, Thomas RAEK3 MRA
>>>> Cc: xenomai@xenomai.org; Gilles Chanteperdrix
>>>> Betreff: Re: [Xenomai-help] Floating Point Exceptions in RT-Tasks
>>>>
>>>> Wolfgang Grandegger wrote:
>>>>> thomas.debes@domain.hid wrote:
>>>>>> Unfortunately I don't have a newer kernel, I will talk 
>> to Wolfgang Grandegger, maybe he can do a short test with my 
>> formerly attached sample application.
>>>>> I will try it out on my TQM5200 board later today or tomorrow.
>>>> With I-Pipe v2.4-03, Xenomai v2.5-devel (SVN revision 
>> 4519) and Linux
>>>> 2.6.26 on my TQM85200 I get:
>>>>
>>>>   -bash-3.2# ./fpu-exception-test
>>>>   Floating point exception
>>>>
>>>>   -bash-3.2# dmesg|tail
>>>>   ...
>>>>   Xenomai: Switching trivial to secondary mode after
>>>>   exception #1792 from user-space at 0x10001840 (pid 1127)
>>>>
>>>> Is that the expected behavior?
>>>>
>>>> Wolfgang.
>>>>
>>>> --------------------------------------------------------
>>>> manroland AG
>>>> Vorsitzender des Aufsichtsrates: Hanno C. Fiedler
>>>> Vorstand: Gerd Finkbeiner (Vorsitzender), Dr. Ingo Koch, 
>> Dr. Markus Rall, Paul Steidle   
>>>> Sitz der Gesellschaft: Offenbach am Main, Registergericht: 
>> Amtsgericht Offenbach HRB-Nr. 42592
>>>> USt-Ident-Nr. DE 250200933
>>>>
>>>> _______________________________________________
>>>> Xenomai-help mailing list
>>>> Xenomai-help@domain.hid
>>>> https://mail.gna.org/listinfo/xenomai-help
>>>>
>>>
>>
>> -- 
>> Philippe.
>>
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>>
> 
> --------------------------------------------------------
> manroland AG
> Vorsitzender des Aufsichtsrates: Hanno C. Fiedler
> Vorstand: Gerd Finkbeiner (Vorsitzender), Dr. Ingo Koch, Dr. Markus Rall, Paul Steidle   
> Sitz der Gesellschaft: Offenbach am Main, Registergericht: Amtsgericht Offenbach HRB-Nr. 42592
> USt-Ident-Nr. DE 250200933
> 


-- 
Philippe.