From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mads Bergdal <mbergdal@gmail.com>
Subject: Re: How to intercept interrupts from guest domains
Date: Tue, 19 Sep 2006 11:52:40 +0200
Message-ID: <eeoelb$qec$1@sea.gmane.org>
References: <eeocd3$iqv$1@sea.gmane.org>
	<C1357BD3.160E%Keir.Fraser@cl.cam.ac.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <C1357BD3.160E%Keir.Fraser@cl.cam.ac.uk>
List-Unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

Keir Fraser wrote:
> On 19/9/06 10:14, "Mads Bergdal" <mbergdal@gmail.com> wrote:
> 
>> I am writing my master thesis on virtualization with Xen. I am trying to
>>     intercept the hypercalls coming from the guest domains. More
>> specific I am trying to determine where in memory a guest domain is
>> writing. Does anyone have a hint on where in the code I should try to do
>> this?
> 
> If you want to know where a guest is writing you need to do more than
> intercept hypercalls. You want to intercept memory accesses to, which would
> liekly mean you need to run on shadow pagetables and manipulate access
> permissions to trap on first access to a page.
> 
>  -- Keir
Yes, that sounds reasonable. Do you know where in the code this could be 
achieved?

Mads