Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756530AbYGAQ7d (ORCPT ); Tue, 1 Jul 2008 12:59:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752044AbYGAQ7Z (ORCPT ); Tue, 1 Jul 2008 12:59:25 -0400 Received: from terminus.zytor.com ([198.137.202.10]:45227 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751988AbYGAQ7Y (ORCPT ); Tue, 1 Jul 2008 12:59:24 -0400 Message-ID: <486A61A7.1000902@zytor.com> Date: Tue, 01 Jul 2008 09:56:07 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: "Eric W. Biederman" CC: Jeremy Fitzhardinge , Mike Travis , Christoph Lameter , Linux Kernel Mailing List Subject: Re: [crash, bisected] Re: [PATCH 3/4] x86_64: Fold pda into per cpu area References: <20080604003018.538497000@polaris-admin.engr.sgi.com> <485AADAC.3070301@sgi.com> <485AB78B.5090904@goop.org> <485AC120.6010202@sgi.com> <485AC5D4.6040302@goop.org> <485ACA8F.10006@sgi.com> <485ACD92.8050109@sgi.com> <485AD138.4010404@goop.org> <485ADA12.5010505@sgi.com> <485ADC73.60009@goop.org> <485BDB04.4090709@sgi.com> <485BE80E.10209@goop.org> <485BF8F5.6010802@goop.org> <485BFFC5.6020404@sgi.com> <486912C4.8070705@sgi.com> <48691556.2080208@zytor.com> <48691E8B.4040605@sgi.com> <48694B3B.3010600@goop.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 794 Lines: 20 Eric W. Biederman wrote: >> >> The zero-based PDA mechanism requires the introduction of a new ELF segment >> based at vaddr 0 which is sufficiently unusual that it wouldn't surprise me if >> its triggering some toolchain bug. > > Agreed. Given the previous description my hunch is that the bug is occurring > during objcopy. If vmlinux is good and the compressed kernel is bad. > Actually, it's not all that unusual... it's pretty common in various restricted environments. That being said, it's probably uncommon for *64-bit* code. -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/