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From: Johann Obermayr <johann.obermayr@domain.hid>
To: xenomai@xenomai.org
Subject: Re: [Xenomai-help] mprotect in Xenomai
Date: Mon, 20 Jun 2011 17:29:34 +0200	[thread overview]
Message-ID: <4DFF675E.6080403@domain.hid> (raw)
In-Reply-To: <4DFF5FEE.8060901@domain.hid>

Am 20.06.2011 16:57, schrieb Gilles Chanteperdrix:
> On 06/20/2011 04:14 PM, Michael Thalmeier wrote:
>>   Hello !
>>
>>   We have a xenomai application that uses mprotect to change write
>>   protection in order to set and clear breakpoint codes.
>>   This works quite well (the code invoking mprotect switches to linux,
>>   but thats ok).
>>   The problem is that from time to time the realtime task executing code
>>   in the area changed with mprotect also switches domains to handle a page
>>   fault.
>>   Is there some functionality in xenomai to change memory protection not
>>   using mprotect ?
>>   Attached you find a short sample that can reproduce this problem.
> I am afraid this is platform dependent, on what architecture do you get
> this behaviour?
>
Hello,

Now we use x86 platform.
later we will use ARM9 or higher.
with  Xenomai 2.5.6 .

Thanks
   Johann



  reply	other threads:[~2011-06-20 15:29 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-20 14:14 [Xenomai-help] mprotect in Xenomai Michael Thalmeier
2011-06-20 14:57 ` Gilles Chanteperdrix
2011-06-20 15:29   ` Johann Obermayr [this message]
2011-06-21  9:08   ` Michael Thalmeier
2011-06-21 10:41     ` Gilles Chanteperdrix
2011-06-21 22:17     ` Gilles Chanteperdrix
2011-06-22  7:08       ` Michael Thalmeier

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