From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 83300C3A59E for ; Mon, 26 Aug 2019 08:31:40 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 555062087E for ; Mon, 26 Aug 2019 08:31:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 555062087E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=vivier.eu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:50866 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i2APb-00048Z-1L for qemu-devel@archiver.kernel.org; Mon, 26 Aug 2019 04:31:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:47826) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i2ANi-00034E-OF for qemu-devel@nongnu.org; Mon, 26 Aug 2019 04:29:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i2ANh-0003pQ-MO for qemu-devel@nongnu.org; Mon, 26 Aug 2019 04:29:42 -0400 Received: from mout.kundenserver.de ([212.227.17.24]:52453) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1i2ANf-0003n8-6j; Mon, 26 Aug 2019 04:29:39 -0400 Received: from [192.168.100.1] ([78.238.229.36]) by mrelayeu.kundenserver.de (mreue109 [213.165.67.119]) with ESMTPSA (Nemesis) id 1MXH3Y-1hj0853nBe-00Yf6A; Mon, 26 Aug 2019 10:29:24 +0200 To: Josh Kunz , qemu-devel@nongnu.org References: <20190816233422.16715-1-jkz@google.com> From: Laurent Vivier Openpgp: preference=signencrypt Autocrypt: addr=laurent@vivier.eu; prefer-encrypt=mutual; keydata= mQINBFYFJhkBEAC2me7w2+RizYOKZM+vZCx69GTewOwqzHrrHSG07MUAxJ6AY29/+HYf6EY2 WoeuLWDmXE7A3oJoIsRecD6BXHTb0OYS20lS608anr3B0xn5g0BX7es9Mw+hV/pL+63EOCVm SUVTEQwbGQN62guOKnJJJfphbbv82glIC/Ei4Ky8BwZkUuXd7d5NFJKC9/GDrbWdj75cDNQx UZ9XXbXEKY9MHX83Uy7JFoiFDMOVHn55HnncflUncO0zDzY7CxFeQFwYRbsCXOUL9yBtqLer Ky8/yjBskIlNrp0uQSt9LMoMsdSjYLYhvk1StsNPg74+s4u0Q6z45+l8RAsgLw5OLtTa+ePM JyS7OIGNYxAX6eZk1+91a6tnqfyPcMbduxyBaYXn94HUG162BeuyBkbNoIDkB7pCByed1A7q q9/FbuTDwgVGVLYthYSfTtN0Y60OgNkWCMtFwKxRaXt1WFA5ceqinN/XkgA+vf2Ch72zBkJL RBIhfOPFv5f2Hkkj0MvsUXpOWaOjatiu0fpPo6Hw14UEpywke1zN4NKubApQOlNKZZC4hu6/ 8pv2t4HRi7s0K88jQYBRPObjrN5+owtI51xMaYzvPitHQ2053LmgsOdN9EKOqZeHAYG2SmRW LOxYWKX14YkZI5j/TXfKlTpwSMvXho+efN4kgFvFmP6WT+tPnwARAQABtCJMYXVyZW50IFZp dmllciA8bGF1cmVudEB2aXZpZXIuZXU+iQI4BBMBAgAiBQJWBTDeAhsDBgsJCAcDAgYVCAIJ CgsEFgIDAQIeAQIXgAAKCRDzDDi9Py++PCEdD/oD8LD5UWxhQrMQCsUgLlXCSM7sxGLkwmmF ozqSSljEGRhffxZvO35wMFcdX9Z0QOabVoFTKrT04YmvbjsErh/dP5zeM/4EhUByeOS7s6Yl HubMXVQTkak9Wa9Eq6irYC6L41QNzz/oTwNEqL1weV1+XC3TNnht9B76lIaELyrJvRfgsp9M rE+PzGPo5h7QHWdL/Cmu8yOtPLa8Y6l/ywEJ040IoiAUfzRoaJs2csMXf0eU6gVBhCJ4bs91 jtWTXhkzdl4tdV+NOwj3j0ukPy+RjqeL2Ej+bomnPTOW8nAZ32dapmu7Fj7VApuQO/BSIHyO NkowMMjB46yohEepJaJZkcgseaus0x960c4ua/SUm/Nm6vioRsxyUmWd2nG0m089pp8LPopq WfAk1l4GciiMepp1Cxn7cnn1kmG6fhzedXZ/8FzsKjvx/aVeZwoEmucA42uGJ3Vk9TiVdZes lqMITkHqDIpHjC79xzlWkXOsDbA2UY/P18AtgJEZQPXbcrRBtdSifCuXdDfHvI+3exIdTpvj BfbgZAar8x+lcsQBugvktlQWPfAXZu4Shobi3/mDYMEDOE92dnNRD2ChNXg2IuvAL4OW40wh gXlkHC1ZgToNGoYVvGcZFug1NI+vCeCFchX+L3bXyLMg3rAfWMFPAZLzn42plIDMsBs+x2yP +bkCDQRWBSYZARAAvFJBFuX9A6eayxUPFaEczlMbGXugs0mazbOYGlyaWsiyfyc3PStHLFPj rSTaeJpPCjBJErwpZUN4BbpkBpaJiMuVO6egrC8Xy8/cnJakHPR2JPEvmj7Gm/L9DphTcE15 92rxXLesWzGBbuYxKsj8LEnrrvLyi3kNW6B5LY3Id+ZmU8YTQ2zLuGV5tLiWKKxc6s3eMXNq wrJTCzdVd6ThXrmUfAHbcFXOycUyf9vD+s+WKpcZzCXwKgm7x1LKsJx3UhuzT8ier1L363RW ZaJBZ9CTPiu8R5NCSn9V+BnrP3wlFbtLqXp6imGhazT9nJF86b5BVKpF8Vl3F0/Y+UZ4gUwL d9cmDKBcmQU/JaRUSWvvolNu1IewZZu3rFSVgcpdaj7F/1aC0t5vLdx9KQRyEAKvEOtCmP4m 38kU/6r33t3JuTJnkigda4+Sfu5kYGsogeYG6dNyjX5wpK5GJIJikEhdkwcLM+BUOOTi+I9u tX03BGSZo7FW/J7S9y0l5a8nooDs2gBRGmUgYKqQJHCDQyYut+hmcr+BGpUn9/pp2FTWijrP inb/Pc96YDQLQA1q2AeAFv3Rx3XoBTGl0RCY4KZ02c0kX/dm3eKfMX40XMegzlXCrqtzUk+N 8LeipEsnOoAQcEONAWWo1HcgUIgCjhJhBEF0AcELOQzitbJGG5UAEQEAAYkCHwQYAQIACQUC VgUmGQIbDAAKCRDzDDi9Py++PCD3D/9VCtydWDdOyMTJvEMRQGbx0GacqpydMEWbE3kUW0ha US5jz5gyJZHKR3wuf1En/3z+CEAEfP1M3xNGjZvpaKZXrgWaVWfXtGLoWAVTfE231NMQKGoB w2Dzx5ivIqxikXB6AanBSVpRpoaHWb06tPNxDL6SVV9lZpUn03DSR6gZEZvyPheNWkvz7bE6 FcqszV/PNvwm0C5Ju7NlJA8PBAQjkIorGnvN/vonbVh5GsRbhYPOc/JVwNNr63P76rZL8Gk/ hb3xtcIEi5CCzab45+URG/lzc6OV2nTj9Lg0SNcRhFZ2ILE3txrmI+aXmAu26+EkxLLfqCVT ohb2SffQha5KgGlOSBXustQSGH0yzzZVZb+HZPEvx6d/HjQ+t9sO1bCpEgPdZjyMuuMp9N1H ctbwGdQM2Qb5zgXO+8ZSzwC+6rHHIdtcB8PH2j+Nd88dVGYlWFKZ36ELeZxD7iJflsE8E8yg OpKgu3nD0ahBDqANU/ZmNNarBJEwvM2vfusmNnWm3QMIwxNuJghRyuFfx694Im1js0ZY3LEU JGSHFG4ZynA+ZFUPA6Xf0wHeJOxGKCGIyeKORsteIqgnkINW9fnKJw2pgk8qHkwVc3Vu+wGS ZiJK0xFusPQehjWTHn9WjMG1zvQ5TQQHxau/2FkP45+nRPco6vVFQe8JmgtRF8WFJA== Message-ID: <5b4df64c-40e4-70cd-753e-f52e2b547c18@vivier.eu> Date: Mon, 26 Aug 2019 10:29:19 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190816233422.16715-1-jkz@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:VmNWjSLjdbGE6vVVKVFt/+0BbXXf1jTv9LArydLn3WsiZJ7ao2V j61TLrP0W+yHaa5ThoNS9zz4Yc170S24jXl+YluJXiVVR9ICalI+EsMcf5ohRpWXdW5/W4u 0IDqPRXlF91wtsJXdKUhUNIy6qpK5i6IbkIRzL7HaxvRZQImhsYATfniaZ7IFFUK5eOg7m8 /McrByILnBjVRogT5pJJg== X-UI-Out-Filterresults: notjunk:1;V03:K0:sFGXFRepLTM=:8IRB5kMtFrTYvjyKOXiblX XuaawcdwjxRAr2zZu0u98rQIA4UGB4LpA5LVITLq9hEv8KVq9RIYPVQMscMZSRqKRHi7QpiwG +jFl71pLkiXYCnrqLzFff6TLEc0Qen0T3bplKCXNKb3ZOxDbPfGxsKW+3UFFowZ32VXdlId3Q O4K+vH1lRnogEK/hkNgaI47IXtGJ1LEEMWxI1oycChah5o5DNogVKUVqZ1tOA6ZhmbVIhgXiv WaqeauD3d/KROY7kcAOlQKlgW/uzUv2eQJf0QzYH4AnIkqwDqXsEKS6bb8hPlKMZaM3JWAWvw lCEX/k3LukH5zUWZPTFM9cqQ34YdaHC1lSSuJY6S/ne/fh6QLskvvxH2fCzFD1M+9Ci3xeE/n AFqbKaTjBgOlww/rijkd8rhLUokhZp3hNDYQWk4bnxVG0pOwaLEPUbAM7CYyvZ1f+bZBhWyew qHF56bfxyuOfTMxLtXf+M4XSrMUWAdQx12v0DE4hucsovbSnW3jPkcdWGpdK3jMphA4p5l3Tz dDUlcy/cUwiLmRU9yJE7/W+h8jJ2+ExcAv5ChwxemVw3c/apszr1guekQ/YVuACQWRVwLImny hDgJG0o+cA4SLbPIBIm8BMqTev3E3+L5zmSyd2sdw56j+r7LaCiAXOE9EvlbUTFotFi0njvif l73rr1rQnhPtXmZfa6V+iExT5KGeXUj37JC0aQC07lpAbii03qdhvMZ23XbL64HP+/8++mSQH HAYTlCZGsrKlKRHpcLnGiXUD05xHESi1xgVu5Rmm+XXrNuvO7GL6dwn/5FZ81HplqFHEyK08Z uDIeSBIktJNrBgzGqqYCLEIgvsRAA== X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 212.227.17.24 Subject: Re: [Qemu-devel] [PATCH] linux-user: Support gdb 'qOffsets' query for ELF X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-trivial@nongnu.org, Riku Voipio Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Le 17/08/2019 à 01:34, Josh Kunz via Qemu-devel a écrit : > This is needed to support debugging PIE ELF binaries running under QEMU > user mode. Currently, `code_offset` and `data_offset` remain unset for > all ELF binaries, so GDB is unable to correctly locate the position of > the binary's text and data. > > The fields `code_offset`, and `data_offset` were originally added way > back in 2006 to support debugging of bFMT executables (978efd6aac6), > and support was just never added for ELF. Since non-PIE binaries are > loaded at exactly the address specified in the binary, GDB does not need > to relocate any symbols, so the buggy behavior is not normally observed. > > Buglink: https://bugs.launchpad.net/qemu/+bug/1528239 > Signed-off-by: Josh Kunz > --- > linux-user/elfload.c | 2 ++ > 1 file changed, 2 insertions(+) As it seems they are text and data segment offsets, why it's not based on info->start_code and info->start_data? Thanks, Laurent