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=-4.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS, USER_AGENT_MUTT 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 707E9C04EBF for ; Mon, 3 Dec 2018 16:59:00 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 4328220834 for ; Mon, 3 Dec 2018 16:59:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="krdUCqKp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4328220834 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-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=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject: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=lD2OwXIDHunES+U8+JhXFqtyI750cDwSuR2NbGTc96I=; b=krdUCqKpfjZyia YFAL1zf9Bwd+hEGHHF78TZPtOR7hIxHdeOJA77W8iYcnXjpuTPuOno4MIlmnOY1OZpi87YzEozWN7 qeOR0x+rcfsXo6J/nWSEoGfUJv+WvYW5eOZe/p6vV59djUuB8w/cGb4kloz2yXzTylWrQouIj6fpe HPZ2JsH+UJWxfJy8DadKQVQHTv3MGWRlvACtX2jHAf3GvjnlUroZOuG3fARKD+521KyxLaqo5tdKe a8756G/cpC4aD3HNkSNS9YODO8fTUadk/S280AIZcBNV/Ns3faOVZB05Wc1hyTVLg6v+tOu6PUFLi reGFxD+km7HwFJyrNNgg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gTrYe-0002rU-LM; Mon, 03 Dec 2018 16:58:56 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gTrYR-0002RS-S9 for linux-arm-kernel@lists.infradead.org; Mon, 03 Dec 2018 16:58:50 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 634A71682; Mon, 3 Dec 2018 08:58:33 -0800 (PST) Received: from edgewater-inn.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 340193F59C; Mon, 3 Dec 2018 08:58:33 -0800 (PST) Received: by edgewater-inn.cambridge.arm.com (Postfix, from userid 1000) id 371071AE10F1; Mon, 3 Dec 2018 16:58:53 +0000 (GMT) Date: Mon, 3 Dec 2018 16:58:53 +0000 From: Will Deacon To: Ard Biesheuvel Subject: Re: [RFT PATCH] arm64: add support for building the KASLR kernel with LLVM lld Message-ID: <20181203165852.GD27796@arm.com> References: <20181201135734.10060-1-ard.biesheuvel@linaro.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20181201135734.10060-1-ard.biesheuvel@linaro.org> User-Agent: Mutt/1.5.23 (2014-03-12) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181203_085844_456251_B6739877 X-CRM114-Status: GOOD ( 14.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: catalin.marinas@arm.com, Peter Smith , Nick Desaulniers , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, Dec 01, 2018 at 02:57:34PM +0100, Ard Biesheuvel wrote: > Work around some differences in the behavior of ld.lld as compared > to lb.bfd: > - pass the -z notext and -z norelro options to convince the linker to > permit text relocations, and relro sections that are non-adjacent > (both of which are irrelevant for bare metal executables such as the > kernel) > - move the definition of some __efistub_ decorated section markers to > the linker script, which permits us to assign them as relative > quantities (since using an intermediate assignment loses the section > relative property when using ld.lld) I'd prefer not to work around a linker bug in today's lld just for KASLR if it's anything more than passing a funny set of linker options. Can you respin without this part, please? Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel