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Re: [Xen-devel] How to intercept interrupts from guest domains

To: Mads Bergdal <mbergdal@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] How to intercept interrupts from guest domains
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Tue, 19 Sep 2006 10:49:55 +0100
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On 19/9/06 10:14, "Mads Bergdal" <mbergdal@xxxxxxxxx> 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

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