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=-7.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 7A6C8C433E6 for ; Thu, 21 Jan 2021 14:26:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3D24E239EF for ; Thu, 21 Jan 2021 14:26:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728708AbhAUO0a (ORCPT ); Thu, 21 Jan 2021 09:26:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:60838 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729321AbhAUOZC (ORCPT ); Thu, 21 Jan 2021 09:25:02 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1AFB8239D1; Thu, 21 Jan 2021 14:24:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1611239061; bh=kv/pVGLXQi9SIxQZUvMuUQoER4ZiAqUomytKzezlGnU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=vDYTKC9hSClRzYZmczK2R8BY79Lab3Orwuve5YD1pgCp490UjBy8JkOsc84Urxuu/ qr5Epy/m42uLfvRCYCYUA6VN4I4iEsJOA7/5sjAEtRIK1RBvyirRtpRfXVv552CUM5 v2lamAIMN7Lsg7P/AsOgqilgH4YuKEfKz3g2axmBR/inX5knruS7iiwKS8yJNn4a7a ut47+sA7cn7X4YCj3MveUgkg3vj5e58wFIROjzP+LbZ/QvLsfz2sdRDY2aJysPSo6g c/hTcdA1iiSksiX0bAg+uJSezy6l5faY7rPR7SdbQaDyVQgndGx8IqsGlWDZQ9Ncez qM6CBMq/t16Qw== Date: Thu, 21 Jan 2021 14:23:42 +0000 From: Mark Brown To: Julien Thierry Cc: Ard Biesheuvel , Linux Kernel Mailing List , Linux ARM , Catalin Marinas , Will Deacon , Masahiro Yamada , Kees Cook , Michal Marek , Josh Poimboeuf , Peter Zijlstra , Mark Rutland , linux-efi , linux-hardening@vger.kernel.org Subject: Re: [RFC PATCH 00/17] objtool: add base support for arm64 Message-ID: <20210121142342.GD4588@sirena.org.uk> References: <20210120173800.1660730-1-jthierry@redhat.com> <186bb660-6e70-6bbf-4e96-1894799c79ce@redhat.com> <6e21cd51-017e-2135-ed9d-33a60f22a457@redhat.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="ZARJHfwaSJQLOEUz" Content-Disposition: inline In-Reply-To: <6e21cd51-017e-2135-ed9d-33a60f22a457@redhat.com> X-Cookie: Generic Fortune. User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --ZARJHfwaSJQLOEUz Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Jan 21, 2021 at 02:23:53PM +0100, Julien Thierry wrote: > On 1/21/21 12:08 PM, Ard Biesheuvel wrote: > > I am not aware of any plans to enable this in GCC, but the Clang > > implementation is definitely intended for production use (it's a CFI > > feature for ROP/JOP mitigation) > I think most people interested in livepatching are using GCC built kernels, > but I could be mistaken (althought in the long run, both compilers should be > supported, and yes, I realize the objtool solution currently only would > support GCC). There definitely seem to be some users interested in both livepatch and clang built kernels so it might come up relatively quickly. --ZARJHfwaSJQLOEUz Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmAJjm4ACgkQJNaLcl1U h9A9zgf8DemVKmPSSW3tOaAAroHKKGZKezs9pF8k8n+yoIghmXnPxd9hrb57ukiw 4tsd0Hdo6TGipkLTKBKf1YiRzEVmMaaskDpl8Fw3nLEswci00beU+AFOF2j67W2Q e6BgBsvxeLbZ3Ga2JDUOFmkAWgHxfb2uPzDcMMWK4kv7aULZuRnaZkK01atGNiEI ApztA5bVxoXBfhtWTDi7mG6Z7fq90/TBnCEkSWAT8xZvzxVCZUlAOBGamkYTmJUx VEebhpacGYMGST8NW/C2AUCOfeYnGIDHpcVipkh49EjelaASMZxmnzF8mQfH6n2B Sly4xPl4R9faZqsqEKsXDfh0uKAbQQ== =CROq -----END PGP SIGNATURE----- --ZARJHfwaSJQLOEUz--