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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3E5F5C4332F for ; Mon, 19 Dec 2022 06:39:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding: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-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=tcO33LDsVS1/aCaOo/yqTBj1oblGvohLrHi2eWy9WvA=; b=oEhuX9tRyxsAcy JHz2/nGrj73UqEuBR3oQPxW6a08Xw6Xd6k8Kf8VEATk/FVVAsdY5nw82s/CtjxdguMZlLz+lpnLnE ohfQN/MSLjKiqSvd+gMyTHsxeRCx4eD5qNLrY2hKr8Eg7cQsxrqeGvAFaP6HZMZZ19I0T3oeWrTdR H5pQG+2jP08Vpe1Y1nNsLlvQhYyeZtwyJ2EledQPFVaq2HrchojpjRmkSbbYF9q0CrZXaHiGmP5jS MhV5v8+J9b+jDU5H6eHlzCZFSis8TRmZg7iyx+nllX13Ryy3UZDurxOuo3e+lficFBNXldC5n5Ix4 EDXSJkJIIIyjoqf3OSEA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1p79n0-009NXT-G6; Mon, 19 Dec 2022 06:38:18 +0000 Received: from mail-pj1-x1034.google.com ([2607:f8b0:4864:20::1034]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1p79mw-009NTR-24 for linux-arm-kernel@lists.infradead.org; Mon, 19 Dec 2022 06:38:15 +0000 Received: by mail-pj1-x1034.google.com with SMTP id v23so2836633pju.3 for ; Sun, 18 Dec 2022 22:38:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:from:to:cc:subject:date :message-id:reply-to; bh=x6wBmBynq3nQh89d9yjAKo+Zm4+3fSnMMUhm5AG3pJM=; b=S+g8KqllwWEGtkNcOGEJzH+dxc16IDbnHaLIL8kA1qbNRTBzIEPovDirRmORPFY261 eAOgaIZWWRdqk1aV2+eaL2PijXAcAgqYhHeY5F2pOrETsfYdmTiwD2QUHYSn5dJBeEOW u2LG4O8Lw2+FFfQJaXecxQR0SrcMrRNakG03ZZ4PXF+dmbLI9/UATauOzqKKaYOHGHcv ODQbTFOSdr62rOsO1JGLLg7RkcCazHP8/1bue+WqY/9Zi0r3PAEKx1cbTDXAjAWihV3t tW0YH/ZfeO58ePx0FACiVpJNY3ej6AKDhgt/kiOu+hTq4+LIE35r4Nc7dtpMPdbH/Pmb rixA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=user-agent:in-reply-to:content-disposition:mime-version:references :message-id:subject:cc:to:from:date:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=x6wBmBynq3nQh89d9yjAKo+Zm4+3fSnMMUhm5AG3pJM=; b=Gbv0s+djWZz2KNXvV+Yyu/rZEyh3y3z1Mf539NBa1zzNvka8S/XVCLRHp5wVVMcBzM Htgg/RZ2m6tHcfGGchSmAR3WKpZ6pRZRzhL8TrJQRn1E0yrrmwvSfqHBHwh1hr8ecGC1 tFBB2g9kNWZnXaIHEYRXrtxtLBA0S/qVfWS/T6qqyc63jnsbwXKLJuejprN8I4HwW3nh T5yivpGerKP44OIv09GJ2UE7P/oMI2cvMOl7KyobXbOdmfQ52dhHyTIZeXeAvJ296VzZ Feg+1gIjxIm53DOD1/oNyfmdDeTMKoeEGs1wGaV08SOtJWn/VegOC//pC9w0sKVgkLRW S7WQ== X-Gm-Message-State: ANoB5pkz7GV1IRrD/GkPYJ1KYUP3jF/oJr284vlWBeZ8qZE0IMIzNDpj 64uMHexqUvqfkB01mHBc5Yg= X-Google-Smtp-Source: AA0mqf6d27dF2FPb3UEwEblMV/YWAgfd/LMdLUPq7GmumP7yoieAsA+YVfvpB/Zr1edEyaAcu1kKcA== X-Received: by 2002:a17:902:ef47:b0:187:1b7a:6930 with SMTP id e7-20020a170902ef4700b001871b7a6930mr47705835plx.6.1671431891959; Sun, 18 Dec 2022 22:38:11 -0800 (PST) Received: from localhost ([103.152.220.92]) by smtp.gmail.com with ESMTPSA id n10-20020a170902e54a00b0018b025d9a40sm6163746plf.256.2022.12.18.22.38.11 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sun, 18 Dec 2022 22:38:11 -0800 (PST) Date: Sun, 18 Dec 2022 22:38:09 -0800 From: Dan Li To: Masahiro Yamada , Michal Marek , Nick Desaulniers , Catalin Marinas , Will Deacon , Sami Tolvanen , Kees Cook , Nathan Chancellor , Tom Rix , Peter Zijlstra , "Paul E. McKenney" , Mark Rutland , Josh Poimboeuf , Frederic Weisbecker , "Eric W. Biederman" , Marco Elver , Christophe Leroy , Song Liu , Andrew Morton , Uros Bizjak , Kumar Kartikeya Dwivedi , Juergen Gross , Luis Chamberlain , Borislav Petkov , Masami Hiramatsu , Dmitry Torokhov , Aaron Tomlin , Kalesh Singh , Yuntao Wang , Changbin Du Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org Subject: Re: [RFC/RFT] CFI: Add support for gcc CFI in aarch64 Message-ID: <20221219063809.xgd6jjio4f7j5ysw@ubuntu> References: <20221219061758.23321-1-ashimida.1990@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20221219061758.23321-1-ashimida.1990@gmail.com> User-Agent: NeoMutt/20171215 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221218_223814_296517_D8FD3D7D X-CRM114-Status: GOOD ( 15.24 ) 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: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org + Cc: linux-hardening@vger.kernel.org On 12/18, Dan Li wrote: > Based on Sami's patch[1], this patch makes the corresponding kernel > configuration of CFI available when compiling the kernel with the gcc[2]. > > The code after enabling cfi is as follows: > > int (*p)(void); > int func (int) > { > p(); > } > > __cfi_func: > .4byte 0x439d3502 > func: > ...... > adrp x0, p > add x0, x0, :lo12:p > mov w1, 23592 > movk w1, 0x4601, lsl 16 > cmp w0, w1 > beq .L2 > ...... > bl cfi_check_failed > .L2: > blr x19 > ret > > In the compiler part[4], there are some differences from Sami's > implementation[3], mainly including: _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel