From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1NAlO6-0001my-E2
	for qemu-devel@nongnu.org; Wed, 18 Nov 2009 09:20:03 -0500
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1NAlNz-0001k4-6k
	for qemu-devel@nongnu.org; Wed, 18 Nov 2009 09:20:00 -0500
Received: from [199.232.76.173] (port=44011 helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1NAlNy-0001jm-O1
	for qemu-devel@nongnu.org; Wed, 18 Nov 2009 09:19:55 -0500
Received: from mx1.redhat.com ([209.132.183.28]:2682)
	by monty-python.gnu.org with esmtp (Exim 4.60)
	(envelope-from <gleb@redhat.com>) id 1NAlNy-0008Rh-C2
	for qemu-devel@nongnu.org; Wed, 18 Nov 2009 09:19:54 -0500
Date: Wed, 18 Nov 2009 16:19:49 +0200
From: Gleb Natapov <gleb@redhat.com>
Subject: Re: [Qemu-devel] Stack corruption problem with SeaBIOS/gPXE under QEMU
Message-ID: <20091118141949.GA3193@redhat.com>
References: <4AFBEF9A.5010802@redhat.com>
	<20091114194745.GA12007@morn.localdomain>
	<4B01555B.1030109@redhat.com> <4B015B6C.4090000@redhat.com>
	<20091117022620.GA25962@morn.localdomain>
	<20091118093949.GA18543@redhat.com> <4B03FB9C.8040407@redhat.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <4B03FB9C.8040407@redhat.com>
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Avi Kivity <avi@redhat.com>
Cc: qemu-devel@nongnu.org, Glauber Costa <glommer@redhat.com>, Kevin O'Connor <kevin@koconnor.net>, gpxe@etherboot.org, Naphtali Sprei <nsprei@redhat.com>

On Wed, Nov 18, 2009 at 03:50:20PM +0200, Avi Kivity wrote:
> On 11/18/2009 11:39 AM, Gleb Natapov wrote:
> >
> >>Hi Avi,
> >>
> >>Can you send the full qemu command line that you used?  I can't seem
> >>to reproduce this on my setup.
> >>
> >>I do see an issue if SeaBIOS's reboot vector is called (eg, by using
> >>"sendkey ctrl-alt-delete" while still in the bios) because seabios
> >>allows gpxe to modify itself, and on a seabios only reboot the gpxe
> >>rom isn't recopied and gpxe therefore gets confused.  However, on a
> >>linux invoked reboot, it looks like a full machine reset occurs and
> >>qemu recopies the gpxe rom, so that doesn't seem to be an issue.
> >>
> >Do we have the same problem with tpr patching rom (vapic,bin)? It modifies
> >itself too.
> 
> But a reset will reload it.
> 
Correct, but Kevin says "sendkey ctrl-alt-delete" jumps to SeaBIOS's
reboot vector without issuing system reset. I am talking about this situation.

--
			Gleb.