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

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

Pass "noexec=off" to the kernel, and it won't set the NX bit in it's
page-table entries, and I presume Xen will just use the same bits as the
guest asks for... One would think, at least.. [I haven't tried this, I
just scanned the kernel source code for the boot-line argument, as I
knew there is some way to enable/disable it...]

Care to divulge what the app is so I can add it to the list of apps that
I'm not going to use? ;-)

--
Mats

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Hans-Christian Armingeon
> Sent: 28 June 2006 10:16
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-devel] how to disable the NX flag in a domU?
> 
> Hi,
> 
> 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.
> 
> Many thanks in advance,
> 
> Johnny
> 
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> 
> 



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