Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764126AbXHAMmi (ORCPT ); Wed, 1 Aug 2007 08:42:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760392AbXHAMma (ORCPT ); Wed, 1 Aug 2007 08:42:30 -0400 Received: from terminus.zytor.com ([198.137.202.10]:55415 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755796AbXHAMm3 (ORCPT ); Wed, 1 Aug 2007 08:42:29 -0400 Message-ID: <46B07F82.1090808@zytor.com> Date: Wed, 01 Aug 2007 08:41:38 -0400 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.5 (X11/20070719) MIME-Version: 1.0 To: bbpetkov@yahoo.de CC: Xudong Guan , linux-kernel@vger.kernel.org, Chuck Ebbert Subject: Re: 2.6.23-rc1: no setup signature found... References: <20070727013615.GC4570@gollum.tnic> <46A9753A.1010206@zytor.com> <20070729085059.GA10758@gollum.tnic> <20070729092402.GA2272@xguan-laptop> <20070729103706.GA16780@gollum.tnic> <46AC9B28.6060906@zytor.com> <20070729191528.GA5166@gollum.tnic> <46ADF02F.7010800@zytor.com> <20070730185359.GA4290@gollum.tnic> <46AE4E29.7060402@zytor.com> <20070801043835.GA4676@gollum.tnic> In-Reply-To: <20070801043835.GA4676@gollum.tnic> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 822 Lines: 21 Borislav Petkov wrote: > > if i do delete here, it loads the second stage of grub and continues to load the > kernel. Is there another way to land at the jmp instruction instead of poking > blindly, maybe disassemble something parts of the initial code. \me reading > grub-docs... > Oh lovely. The purpose of this was to intercept the running of the kernel setup code. If grub doesn't load it at a 64K boundary, it is hard to guess what it would do. I'll do some experiments with qemu here and see if I can figure out a way to get it to trap at the right point. -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/