From: Keir Fraser <keir.fraser@eu.citrix.com>
To: "Eads, Joshua Michael (S&T-Student)" <jmer43@mst.edu>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: HVM context
Date: Sat, 10 Oct 2009 07:27:37 +0100 [thread overview]
Message-ID: <C6F5E7E9.171BB%keir.fraser@eu.citrix.com> (raw)
In-Reply-To: <BA45F53E48458E4D9E2DEBDF164A7E8C02EA2A@MST-VMAIL6.srv.mst.edu>
On 09/10/2009 22:47, "Eads, Joshua Michael (S&T-Student)" <jmer43@mst.edu>
wrote:
> I have an HVM guest and I am trying to have a usermode program in Dom0 query
> the context (CPU registers, specifically) of the guest.
>
> I first tried using xc_domain_getcontext() in xenctrl.h but I haven't figured
> out what data structure ctxt_buf is that it returns. Next, I have tried using
> xc_vcpu_getcontext() in xenctrl.h but so far it always returns -1 for failure.
> For xc_vcpu_getcontext, I am passing in a vcpu number of 1 (I only have a
> single virtual CPU domU running) along with an unallocated
> vcpu_guest_context_t pointer.
>
> Is this the right direction to pull guest registers, or is there another
> method I need to use to get the HVM guest context?
For an HVM guest you can use xc_domain_hvm_getcontext() or
xc_domain_hvm_getcontext_partial(). You then have to pick apart the bag of
bytes you get back. The save format is documented to some extent in
xen/include/public/arch-x86/hvm/save.h
-- Keir
next prev parent reply other threads:[~2009-10-10 6:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-09 21:47 (no subject) Eads, Joshua Michael (S&T-Student)
2009-10-10 6:27 ` Keir Fraser [this message]
2009-10-10 14:34 ` HVM context Dan Magenheimer
2009-10-15 2:55 ` NAHieu
2009-10-15 6:47 ` Keir Fraser
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