Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752527AbaFFTIy (ORCPT ); Fri, 6 Jun 2014 15:08:54 -0400 Received: from mail-ve0-f177.google.com ([209.85.128.177]:61881 "EHLO mail-ve0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752303AbaFFTIw convert rfc822-to-8bit (ORCPT ); Fri, 6 Jun 2014 15:08:52 -0400 MIME-Version: 1.0 In-Reply-To: References: <53920B05.9010602@mit.edu> From: Andy Lutomirski Date: Fri, 6 Jun 2014 12:08:31 -0700 Message-ID: Subject: Re: "." in vmlinux.lds.S To: =?UTF-8?B?SMOhbiBTaMSbbiAo5rKI5ra1KQ==?= Cc: "linux-kernel@vger.kernel.org" , X86 ML Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jun 6, 2014 at 11:53 AM, Hán Shěn (沈涵) wrote: > Yeah, the symbol "__end_rodata_hpage_align" is defined as absolute in > older binutils, the newer binutils making it relative seems > meaningless in this context. What I mean is: what actually changes in the linker output when the symbol is relative? --Andy > > On Fri, Jun 6, 2014 at 11:40 AM, Andy Lutomirski wrote: >> On 06/06/2014 10:08 AM, Hán Shěn (沈涵) wrote: >>> A gentle ping? >>> >>> On Tue, Jun 3, 2014 at 2:46 PM, Hán Shěn (沈涵) wrote: >>>> Hi we are trying to boot up a x86_64 chrome book using binutils 2.24 and >>>> kernel 3.8, but failed. >>>> >>>> After some triage work, we found that a 2-year-old binutil CL changed the >>>> interpretation of "." in linker script （short story: absolute -> relative, >>>> long story: https://sourceware.org/ml/binutils/2012-06/msg00155.html). >>>> >>>> After some further work, we are able to boot the kernel with a kernel patch >>>> pasted at EOM. I am curious, why the upstream kernel is never hit by this >>>> behavior? We enabled "CONFIG_DEBUG_RODATA", so we were hit, is this some >>>> macro not usually turned on? >> >> What does a section-relative symbol do? >> >> --Andy > > > > -- > Han Shen | Software Engineer | shenhan@google.com | +1-650-440-3330 -- Andy Lutomirski AMA Capital Management, LLC -- 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/