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Re: [Xen-devel] Crashing Xen

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Crashing Xen
From: Jacob Gorm Hansen <jacob@xxxxxxxx>
Date: Wed, 07 Jan 2004 17:29:57 +0100
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
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On Wed, 2004-01-07 at 16:52, Keir Fraser wrote:
> > Does Xen use the start_info (passed in ctxt->esi) for anything (such as
> > setting up CR3), or is this value just passed on to the domain? Is
> > passing bogus start_info a problem for Xen?
> No, the start_info structure is opaque to Xen. The definition of
> start_info, and the convention of passing a pointer to it in %esi, is
> known only to DOM0 control utils and guest OSes.
> > If not, what is the state of CR3 and paging when the domain boots?
> It's a field in full_execution_context_t, passed to

This is what went wrong, specifying a sane pt_base value improved
things. I suppose that in a perfect world Xen could check the ownership
and pinning of this page and report and error on domain creation.


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