Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp29887imu; Fri, 14 Dec 2018 13:49:14 -0800 (PST) X-Google-Smtp-Source: AFSGD/Vb3vKCN+jOBTLDeMGWU2QzMVkTdpARewXjBF28UJ+pG2rEVflqhpXg2UkC/xqvPUq8xi4u X-Received: by 2002:a17:902:2867:: with SMTP id e94mr4461577plb.264.1544824154302; Fri, 14 Dec 2018 13:49:14 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1544824154; cv=none; d=google.com; s=arc-20160816; b=nj21BSDT4aM4/4J5H++rMSGFwItWk3G3DBMJMMyjAghhurc0VHM5wxNd8tbGMaWE14 uAvChhVU8jyww5jR8MC8+NJUEdWhWjWq11cDh37iKuyxYPTfRIPGRA75PLorMWn7sr7O z7kuEEUeQzJG8ocUc36K/TxfDYB8xoiX7LdpymzbeOiMv2M8MQtOoB9wFo7L4NRnDZcQ qT4ntlkOF/K9sCpSndSTF55KLjAO3UOg33pFwA+nrAxFACYQWSGXwy+eC9GQyCw7ilfS 8Fk5AHA7bxvrkkKhyDA0/G6AYL4k8WQ2pJd28vOTAAFVWPE/hcqa04Xp0qRCCr9pR3ks uJYQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:mime-version:user-agent:date:message-id:subject :from:cc:to; bh=4StXW58yzpthNc1xin79Mx1mpOs8TeTw8hd0yZ43/TE=; b=iYsyXycwPAAE7izr15+dooa4RIXipFjosIRDuMX643JstL78yz+7KzY/JV9uk6qrIF UlfbucI8bi2l5Xm4jGbS1rjq4wghKGOEbjRdfUcGXirYSItOCF1+YSLDh8BnXZ9wF7k3 3JlTmbDp/ZQJof96olPNnE2Qoi3V+zR8JaA4Waq/35bZGTIETjqIRosyavW40N0UHqXe y9C9zUIyxx+9jubo96u4vfTuQVJBv8zShpxCCZglfaTtL41RCAPjf5UO0yIjZnnvcOLQ cJ1r3uQCd8PCAk2F3wfKzwBYJiGsEdvy5LYl8JN2Azl/llAsc0MZxz/mt61psMGmCHbm fA9w== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id c8si4683553pgc.65.2018.12.14.13.48.59; Fri, 14 Dec 2018 13:49:14 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731092AbeLNVsE (ORCPT + 99 others); Fri, 14 Dec 2018 16:48:04 -0500 Received: from mail-qt1-f195.google.com ([209.85.160.195]:34499 "EHLO mail-qt1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730734AbeLNVsD (ORCPT ); Fri, 14 Dec 2018 16:48:03 -0500 Received: by mail-qt1-f195.google.com with SMTP id r14so7917371qtp.1 for ; Fri, 14 Dec 2018 13:48:03 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:to:cc:from:subject:message-id:date:user-agent :mime-version:content-language:content-transfer-encoding; bh=4StXW58yzpthNc1xin79Mx1mpOs8TeTw8hd0yZ43/TE=; b=lO2xgVAf5shDeb4B9FNF9Gtq9XWpc5fGxTJKsWi9VoEvT50IHJD7Hndl8TDOjYfk8h 0rwGOT9NjdRUb1TKVKt1avjjTC6aXXzQLyWAv5KU3io5wT6sByFqyT1c0KeCbMQZaI0Q urvO0ei16QoYHHaO/pP/tbaVwqCItyc8b4r+fXfPDxCYMNUlmwH1RmUMbsQj8f8kvXFw MK034P9Cpdo3z0Wd2BvWn1Uvl0dA8G3sf2E1YmEz/jxwS7dznpWk3In+GJHDm4e/Fcpj SaIDUmRit770bxthztguJVxtq8TWQqefhCPJJwgUarW9F5NhLKaa8vjlvXEDx14lGyyF H1zA== X-Gm-Message-State: AA+aEWZFrJOzXZywJ76+MVxh1q6dBfn7HAN+fXFm/HhkKs0TFEsZlZAH WusKNbSqB6mNgXdqmPnx+Lu6Rb3H97c= X-Received: by 2002:aed:25a6:: with SMTP id x35mr4634856qtc.228.1544824082975; Fri, 14 Dec 2018 13:48:02 -0800 (PST) Received: from ?IPv6:2601:602:9802:a8dc::c5f1? ([2601:602:9802:a8dc::c5f1]) by smtp.gmail.com with ESMTPSA id x49sm4606245qta.89.2018.12.14.13.48.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 14 Dec 2018 13:48:02 -0800 (PST) To: Andy Lutomirski , Thomas Gleixner , Alistair Strachan Cc: "H. Peter Anvin" , kernel-team@android.com, joel@joelfernandes.org, X86 ML , linux-kernel@vger.kernel.org, Florian Weimer , Carlos O'Donell , "H. J. Lu" From: Laura Abbott Subject: Unwinding regression with 379d98ddf413 ("x86: vdso: Use $LD instead of $CC to link") Message-ID: <9aa7b39c-707e-c87a-ad4c-f54ff08e3172@redhat.com> Date: Fri, 14 Dec 2018 13:48:00 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, There are two reports of a regression with unwinding with 379d98ddf413 ("x86: vdso: Use $LD instead of $CC to link") https://bugzilla.kernel.org/show_bug.cgi?id=201741 https://bugzilla.redhat.com/show_bug.cgi?id=1659295 It looks like the unwinding information has been stripped out. Any ideas? Thanks, Laura