From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760632AbYEMOAL (ORCPT ); Tue, 13 May 2008 10:00:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757426AbYEMN76 (ORCPT ); Tue, 13 May 2008 09:59:58 -0400 Received: from gw.goop.org ([64.81.55.164]:52257 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756206AbYEMN75 (ORCPT ); Tue, 13 May 2008 09:59:57 -0400 Message-ID: <48299ED0.6020402@goop.org> Date: Tue, 13 May 2008 14:59:44 +0100 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: "Robert Kaiser (FH)" CC: xen-devel@lists.xensource.com, Ingo Molnar , Linux Kernel Mailing List Subject: Re: [Xen-devel] Re: [PATCH] xen: remove support for non-PAE 32-bit References: <48243015.2010801@goop.org> <200805131332.14631.kaiser@informatik.fh-wiesbaden.de> <48298002.5080300@goop.org> <200805131528.09429.kaiser@informatik.fh-wiesbaden.de> In-Reply-To: <200805131528.09429.kaiser@informatik.fh-wiesbaden.de> X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Robert Kaiser (FH) wrote: >> I think there's a bug in qemu's x86 >> emulation with respect to mis-reporting the eip of an xchg which faults, >> which may be what you're seeing. >> > > The eip that was reported was always the same, and there was no xchg > instruction at that address. It might have been consistently wrong though > (how would I figure this out?). > The symptom I've observed is that qemu reports the first instruction of the basic block rather than the exchange itself. If you "x/10i ", you should see an xchg before long. Either way, sounds like a qemu bug which should be reported to them. J