Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752302AbaFFRJB (ORCPT ); Fri, 6 Jun 2014 13:09:01 -0400 Received: from mail-ie0-f176.google.com ([209.85.223.176]:41572 "EHLO mail-ie0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751624AbaFFRJA convert rfc822-to-8bit (ORCPT ); Fri, 6 Jun 2014 13:09:00 -0400 MIME-Version: 1.0 In-Reply-To: References: Date: Fri, 6 Jun 2014 10:08:59 -0700 Message-ID: Subject: Re: "." in vmlinux.lds.S From: =?UTF-8?B?SMOhbiBTaMSbbiAo5rKI5ra1KQ==?= To: linux-kernel@vger.kernel.org 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 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? > > Patch here ---- > diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S > index d329fc4..d5dc570 100644 > --- a/arch/x86/kernel/vmlinux.lds.S > +++ b/arch/x86/kernel/vmlinux.lds.S > @@ -58,7 +58,7 @@ jiffies_64 = jiffies; > > #define X64_ALIGN_DEBUG_RODATA_END \ > . = ALIGN(HPAGE_SIZE); \ > - __end_rodata_hpage_align = .; > + __end_rodata_hpage_align = ABSOLUTE(.); > > #else > > @@ -159,7 +159,7 @@ SECTIONS > #ifdef CONFIG_X86_64 > > . = ALIGN(PAGE_SIZE); > - __vvar_page = .; > + __vvar_page = ABSOLUTE(.); > > .vvar : AT(ADDR(.vvar) - LOAD_OFFSET) { > /* work around gold bug 13023 */ > @@ -325,7 +325,7 @@ SECTIONS > __brk_limit = .; > } > > - _end = .; > + _end = ABSOLUTE(.); > > STABS_DEBUG > DWARF_DEBUG > -- Han Shen | Software Engineer | shenhan@google.com | +1-650-440-3330 -- 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/