[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Rep:Re: [f-cpu] SR security
- To: <f-cpu@seul.org>
- Subject: Rep:Re: [f-cpu] SR security
- From: "Nicolas Boulay" <nicolas.boulay@ifrance.com>
- Date: Wed, 7 Aug 2002 09:25:26 GMT
- Delivered-To: archiver@seul.org
- Delivered-To: f-cpu-outgoing@seul.org
- Delivered-To: f-cpu@seul.org
- Delivery-Date: Wed, 07 Aug 2002 05:25:38 -0400
- Reply-To: f-cpu@seul.org
- Send-By: 140.94.82.18 with Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt; FR 15/06/2000)
- Sender: owner-f-cpu@seul.org
-----Message d'origine-----
De: cedric <cedric.bail@free.fr>
A: f-cpu@seul.org
Date: 07/08/02
Objet: Re: [f-cpu] SR security
<snip>
> What I think we need to add :
> - READ_ONLY, that say if we must trap or not when we access
> to read only SR
> - WRITE_ONLY, idem but for read/write SR
> - ASI, the Identifier of the current task
> - IRQ_STACK_BASE and IRQ_STACK_SIZE, for being able to handle
> multiple IRQ at the same time
> - TRAP_STACK_BASE and TRAP_STACK_SIZE, in case of multiple TRAP
> (I think it's not usefull, because the trap handler must do his job
> correctly)
I forget some of them :
- RANDOM, random key for pseudo-random initialisation (depend on the
implementation)
- USER, currently only the LSB is usefull to say if we are SUPER_USER
or
not.
>>> A task should not know if it run in superuser mode or not. So ?
>>>Maybe we should add a free running timer, and "some" timer alarm that
generate interrupt (for complexe schuling policy, very precise timing,
low power,...).
nicO
Cedric
*************************************************************
To unsubscribe, send an e-mail to majordomo@seul.org with
unsubscribe f-cpu in the body. http://f-cpu.seul.org/
______________________________________________________________________________
Nouveau sur i (france), ne vous faites pas piquer votre nom!
Réservez dès à présent votre nom de domaine pour 1 Euro* HT/mois (*à partir de)
http://www.ifrance.com/_reloc/signdom
*************************************************************
To unsubscribe, send an e-mail to majordomo@seul.org with
unsubscribe f-cpu in the body. http://f-cpu.seul.org/