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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 60082C0650F for ; Mon, 5 Aug 2019 13:39:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3D8BA2067D for ; Mon, 5 Aug 2019 13:39:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729338AbfHENj4 (ORCPT ); Mon, 5 Aug 2019 09:39:56 -0400 Received: from foss.arm.com ([217.140.110.172]:49382 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726508AbfHENj4 (ORCPT ); Mon, 5 Aug 2019 09:39:56 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E7872337; Mon, 5 Aug 2019 06:39:55 -0700 (PDT) Received: from arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E42FA3F706; Mon, 5 Aug 2019 06:39:54 -0700 (PDT) Date: Mon, 5 Aug 2019 14:39:48 +0100 From: Dave Martin To: Nathan Huckleberry Cc: Robin Murphy , clang-built-linux , Tri Vo , linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH] ARM: UNWINDER_FRAME_POINTER implementation for Clang Message-ID: <20190805133940.GA10425@arm.com> References: <20190801231046.105022-1-nhuck@google.com> <01222982-4206-9925-0482-639a79384451@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 02, 2019 at 10:27:30AM -0700, Nathan Huckleberry wrote: > You're right. Would pushing an extra register be an adequate fix? Would forcing CONFIG_ARM_UNWIND=y for clang work as an alternative to this? Assuming clang supports -funwind-tables or equivalent, this may just work. [...] Cheers ---Dave