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=-11.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,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 E9865C433ED for ; Thu, 13 May 2021 17:09:00 +0000 (UTC) Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (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 A310F6141B for ; Thu, 13 May 2021 17:09:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A310F6141B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Type: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Reply-To:Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date :Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=F01GH6Mpb0gvfBkvLmuB2+FZqpvlX0jPv9cys+l1q7Y=; b=EQeAfkKI/RHNYLHWHSR0UKTHA qROxs66KWWM+JfMSBMQz4UuT8KpSgEiDQ882trdDd4J26oeirczYmMshPsKnLQgwxnf9IYvgwT3zu 9epCqz+AApELEgsYMFmzw6NktiCTZ442yegDdBz9VwfaRjELl4XhI0c+A/W5qjNZGC235VHdHYejj sfC1CFc04WJgMCLvQrZF8ct0/cY0KDT53vSpDSPmR/Pc86VaaAcQ5AlBRu8RjuXf+7NEhJHDmzXYk QdtKQLi9g2DUwOCqwJ1VH9N5baWYyU52YmDRw1N3fc9sYHSvajevPC4Io5ZgiSedt+qior7yGcfXl tnOZw+NWg==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lhEnn-0062an-Mt; Thu, 13 May 2021 17:07:11 +0000 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lhEnk-0062ab-PX for linux-arm-kernel@desiato.infradead.org; Thu, 13 May 2021 17:07:08 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=iBml8VQzEnzAo44EhS32QqC1xpGZKo/THSY3i7QYDu4=; b=3wBNRr+6ln0rP9AvT/678Uw9fQ r/QKhqWCjRwgN9sJhVpwqQv77dwsw0xywHKQQppHYY8rm6WXOplahD5GI5zyTodOsqOHITYIuV5V1 +bwkwaliy/aBFV9L4linVwXtMy+2JxlTmFYWEcWGkIFiovMOpoZYBdjEtwKrHvXV9SyU37ZhXAHs1 qdUMJ+i0thAbpAgOYEiZApTHOMSNIE9Ej4fL2h/oa1oAqbY0MHnWm6Xo7LULg+4PRdboD5wIJjTbI VmZtUO4naj9AYPSrmpRJrhBqIJJ26lYIeTwFA1nTTK/5ffZtbSCKejZEHCmfzIDZg6fgTivWCeihq 8x42x32g==; Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lhEni-00BPEM-AT for linux-arm-kernel@lists.infradead.org; Thu, 13 May 2021 17:07:07 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6A52F6117A; Thu, 13 May 2021 17:07:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1620925625; bh=iBml8VQzEnzAo44EhS32QqC1xpGZKo/THSY3i7QYDu4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=RctcmTKk/YryfPdRp1meG5RrL0w6nQDAntg2mJGYLnBLp4aqUyp/9S1D/gkWreYZW qslKZ61PU2Q3EI51D51YQrDkCkEL34Jq677JJ3LM6rUADOJoJL07ovkDDatO0ykERk kchAwGDL8oTPSFtyV0sElkZFHnXdukIWcZK4M2jNAeuXXpqN8BUihNxEkfF18L5SQd TL7+Bo3RUQj6vCBZRuMl6XlhFG8+VueMTSFHlU0SaVcyk/9lUCbEF4PDScSde9DysO 8SUBDs3Xl3i/yr5Wlx2EnHInCP1hzNjLUGYuSCesbdotH9Lby/6robtRCFQ8aGfp0v YYnQVto4/aTmA== Date: Thu, 13 May 2021 18:06:24 +0100 From: Mark Brown To: Peter Collingbourne Cc: Mark Rutland , Will Deacon , Catalin Marinas , Andrey Konovalov , Evgenii Stepanov , Ard Biesheuvel , Linux ARM Subject: Re: [PATCH v5 2/3] arm64: stacktrace: Relax frame record alignment requirement to 8 bytes Message-ID: <20210513170624.GE5813@sirena.org.uk> References: <20210513165427.1133795-1-pcc@google.com> <20210513165427.1133795-2-pcc@google.com> MIME-Version: 1.0 In-Reply-To: <20210513165427.1133795-2-pcc@google.com> X-Cookie: snafu = Situation Normal All F%$*ed up User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210513_100706_409771_5BF1E47A X-CRM114-Status: GOOD ( 10.48 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============6395799365559823275==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============6395799365559823275== Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="G6nVm6DDWH/FONJq" Content-Disposition: inline --G6nVm6DDWH/FONJq Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, May 13, 2021 at 09:54:26AM -0700, Peter Collingbourne wrote: > The AAPCS places no requirements on the alignment of the frame > record. In theory it could be placed anywhere, although it seems > sensible to require it to be aligned to 8 bytes. With an upcoming > enhancement to tag-based KASAN Clang will begin creating frame records > located at an address that is only aligned to 8 bytes. Accommodate > such frame records in the stack unwinding code. Reviewed-by: Mark Brown --G6nVm6DDWH/FONJq Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmCdXI8ACgkQJNaLcl1U h9AqGAf8CIpwLVBAWWT/zBsdu7cYleVgTzb+dbrR+m4vrAtZH8RcZjvAwQIuDkS1 mnRU0YvmTzWYVneF9Ntrv3O5SsJP6SlhIf7n9mdTF53QP2qTqpp+7QItz2MilZk9 WZCDPRq1AbCwLwUk7CA8+NbqwUNGMJFwT1/SOWbdeNVq/CpCmyAZXnDqybEocTXQ 9Oc6cph7tYH+X3asjGqo9qTtQgzeBmvpM7B7O7MUT243AulFQ7OmtYrkwjXbTWuv nckyLdcw59QtEwWLvQb0cBXDASc1AGVKUsNWnoltg5Y1yhx6H/WvxQXuzk4yYenI oLezTzrVDV5HRPZ+Q5I+drjiAu644Q== =3m7J -----END PGP SIGNATURE----- --G6nVm6DDWH/FONJq-- --===============6395799365559823275== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --===============6395799365559823275==--