From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 5809 invoked by alias); 16 Mar 2012 19:57:27 -0000 Received: (qmail 5797 invoked by uid 22791); 16 Mar 2012 19:57:25 -0000 X-SWARE-Spam-Status: No, hits=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW X-Spam-Check-By: sourceware.org Received: from mail-yw0-f41.google.com (HELO mail-yw0-f41.google.com) (209.85.213.41) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Fri, 16 Mar 2012 19:57:12 +0000 Received: by yhr47 with SMTP id 47so5545185yhr.0 for ; Fri, 16 Mar 2012 12:57:11 -0700 (PDT) Received: by 10.50.157.165 with SMTP id wn5mr330560igb.64.1331927831512; Fri, 16 Mar 2012 12:57:11 -0700 (PDT) MIME-Version: 1.0 Received: by 10.42.239.131 with HTTP; Fri, 16 Mar 2012 12:56:38 -0700 (PDT) In-Reply-To: <20120316184831.GA32437@host2.jankratochvil.net> References: <201203161838.q2GIceWD010681@new.toad.com> <20120316184831.GA32437@host2.jankratochvil.net> From: Martin Langhoff Date: Fri, 16 Mar 2012 19:57:00 -0000 Message-ID: Subject: Re: Reading dynamic symbols from Linux core files? To: Jan Kratochvil Cc: John Gilmore , gdb@sourceware.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org X-SW-Source: 2012-03/txt/msg00044.txt.bz2 On Fri, Mar 16, 2012 at 2:48 PM, Jan Kratochvil wrote: > The problem usually was - at least in some Fedoras + RHELs - that vDSO has > overgrown 4KB. =A0The loadable segment remained in the first 4KB part but > debugging symbols spanned more pages which led to bfd_from_remote_memory > cutting off the debug symbols. =A0Recent Fedora patch for it is: > =A0 =A0 =A0 =A0http://pkgs.fedoraproject.org/gitweb/?p=3Dgdb.git;a=3Dblob= _plain;f=3Dgdb-6.6-bfd-vdso8k.patch;hb=3Dmaster So we're SOL? BTW, thanks Jan and John for taking this upstream with a background knowledge I can't match! One thing to note is that we cannot entirely rule out some binaries being corrupt. This problem has already crossed several "that's impossible" boundaries. One of our avenues of investigation is an SD card duplicator introducing some odd fs corruption, although rpm -Va and other checksums tell us the files are good. Also - http://lists.fedoraproject.org/pipermail/devel/2012-March/164105.html m --=20 =A0martin.langhoff@gmail.com =A0martin@laptop.org -- Software Architect - OLPC =A0- ask interesting questions =A0- don't get distracted with shiny stuff=A0 - working code first =A0- http://wiki.laptop.org/go/User:Martinlanghoff