User Extensions, TCB Extension area, and TCBs in general

[Gedare Bloom]

Someone please open a ticket.

On Sat, Jun 13, 2015 at 3:00 AM, Sebastian Huber
<sebastian.huber at embedded-brains.de> wrote:
> The extensions are added and not replaced by rtems_extension_create().  It seems we have to clarify the documentation.
>
> ----- Wu, Mark H. <Mark.H.Wu at disney.com> schrieb:
>> Sorry to revive an old thread, but I have a question that may solve my confusion here. When I call rtems_extension_create(), does this add or replace the current extension set? My interpretation from the documentation was that it replaced the set, but looking through some of the source code, it appears that it might actually add to the set? So if I add stack bounds checking, I don't actually have to worry about re-adding it to any new extension sets? If that's the case, then it fully addresses all of my concerns!
>>
>> It looks like the order of calling the extensions is in the order they were created. Is that correct?
>>
>> -----Original Message-----
>> From: Sebastian Huber [mailto:sebastian.huber at embedded-brains.de]
>> Sent: Monday, May 18, 2015 00:09
>> To: Wu, Mark H.; users at rtems.org
>> Subject: Re: User Extensions, TCB Extension area, and TCBs in general
>>
>> On 15/05/15 16:46, Wu, Mark H. wrote:
>> > I understand that you use rtems_extension_create(), but some of that is done "quietly." Specifically, the static extension set is created by configure, and the stack bounds checking is created similarly (if you use the mechanism described in the documentation). How do I get the object identifiers that are created/returned by that configuration/initialization code?
>>
>> The statically configured extensions have no object identifier and there
>> is no field for them in the TCB. If you use the Git master on ARM,
>> PowerPC or SPARC, then I would use thread-local storage for your extension.
>>
>> --
>> Sebastian Huber, embedded brains GmbH
>>
>> Address : Dornierstr. 4, D-82178 Puchheim, Germany
>> Phone   : +49 89 189 47 41-16
>> Fax     : +49 89 189 47 41-09
>> E-Mail  : sebastian.huber at embedded-brains.de
>> PGP     : Public key available on request.
>>
>> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>
> --
> Sebastian Huber, embedded brains GmbH
>
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone   : +49 89 189 47 41-16
> Fax     : +49 89 189 47 41-09
> E-Mail  : sebastian.huber at embedded-brains.de
> PGP     : Public key available on request.
>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
> _______________________________________________
> users mailing list
> users at rtems.org
> http://lists.rtems.org/mailman/listinfo/users