xen-devel

[Top] [All Lists]

Re: [Xen-devel] how to disable the NX flag in a domU?

from [Hans-Christian Armingeon]

[Permanent Link][Original]

To:	xen-devel@xxxxxxxxxxxxxxxxxxx
Subject:	Re: [Xen-devel] how to disable the NX flag in a domU?
From:	Hans-Christian Armingeon <mog.johnny@xxxxxxx>
Date:	Fri, 7 Jul 2006 12:49:11 +0200
Delivery-date:	Mon, 10 Jul 2006 04:18:52 -0700
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxx
In-reply-to:	<3fa8f60688a06d87cb22c3f7523e750f@xxxxxxxxxxxx>
List-help:	<mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id:	Xen developer discussion <xen-devel.lists.xensource.com>
List-post:	<mailto:xen-devel@lists.xensource.com>
List-subscribe:	<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe:	<http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References:	<200606281115.54784.mog.johnny@xxxxxxx> <3fa8f60688a06d87cb22c3f7523e750f@xxxxxxxxxxxx>
Sender:	xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent:	KMail/1.9.3

Hi,

Am Mittwoch, 28. Juni 2006 12:39 schrieb Keir Fraser:
> 
> On 28 Jun 2006, at 10:15, Hans-Christian Armingeon wrote:
> 
> > I am having problems with an unclean written closed source 
> > application, which segfaults by time, because it has executable code 
> > on the stack.
> >
> > Is it possible, to disable the NX bit on modern processors for a domU? 
> > I know, this is an unclean solution - but it would be a quick fix.
> 
> You can specify 'noexec=off' to your domU Linux.

I have

extra = "noexec=off"

in my domU config, but I still get segfaults. I wrote a small program, that 
executes a printf on the stack, and it doesn't work. It works fine on x86 - it 
executes the printf on the stack.

Do I need to disable the nx flag globally on dom0?

Johnny

> 
>   -- Keir
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
> 

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

[More with this subject...]

<Prev in Thread]	Current Thread	[Next in Thread>
Re: [Xen-devel] how to disable the NX flag in a domU?, Hans-Christian Armingeon <= Re: [Xen-devel] how to disable the NX flag in a domU?, Hans-Christian Armingeon

Previous by Date:	Re: [Xen-devel] [PATCH 1/2] Virtual frame buffer: frontend, Christian Limpach
Next by Date:	[Xen-devel] Massive UDP packet dropping, TRABE Patrick
Previous by Thread:	[Xen-devel] VMX status report 10648:30cdeb686b93, Zheng, Jeff
Next by Thread:	Re: [Xen-devel] how to disable the NX flag in a domU?, Hans-Christian Armingeon
Indexes:	[Date] [Thread] [Top] [All Lists]