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=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 2A6DFC47257 for ; Tue, 5 May 2020 14:56:50 +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 E9B6E20757 for ; Tue, 5 May 2020 14:56:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="YDIf+kCM"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Rx6unWTx" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E9B6E20757 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+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=keTmh9fYCSI1Epo9Dx7EHUaqFeOrWnoHAy4L8gmbmC0=; b=YDIf+kCMgFAKFR 4rvCay3wBeDD2ecaT+i44VKZ/xtw5JMMYh+s2zCZJBPdhS5yDjJh/z7Bq4ec9cNhqUOv8HgTCFAlJ vlD0oUxXm/+LwWGV19DPIg8faZjFSAjEvp6J8MWWpvcigINuxIxTT1gb3zZgdPvAP2Hsnp6s23ieJ Sd5pFQYou3i6OxxoszNzrZGXiJ1sCrLxG2Q7hKb8Puswk2sqVZ4LOnGXx4Af5Nw69SNxngHeNRYFl JYwUW5i77ySHEzRLSoorzto6cGdsN0pAIRMLSgn+rJ8vYSh81En2ZnRr9W579il0wWiA53rVAuefl 7shqJGyWE5W6rjhD2CNw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jVz05-00070a-IA; Tue, 05 May 2020 14:56:49 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jVz03-00070G-Mt for linux-arm-kernel@lists.infradead.org; Tue, 05 May 2020 14:56:48 +0000 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5A25F206B9; Tue, 5 May 2020 14:56:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588690607; bh=VsWSq2B7ATKFsBs4BtkuB9J55zym2EEDhXZwpOotMRY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Rx6unWTxZ3spdPNWss5sKYksJjTZJrrPJglouY+nJMCeH6mBVyfWxfx7dyVUFW7M/ uAF0yWq/pMCSpBq2Uv3Ki8em/UdcQVWvVncRKuopHLdsoWwN+a4LKCdHuJlF3TyDsJ hSQ9gR6PjKytlFId4nEg55s5XrsR5a6z18E3TBiE= Date: Tue, 5 May 2020 15:56:42 +0100 From: Will Deacon To: Mark Brown Subject: Re: [PATCH v2 02/10] arm64: asm: Override SYM_FUNC_START when building the kernel with BTI Message-ID: <20200505145642.GA24239@willie-the-truck> References: <20200429211641.9279-1-broonie@kernel.org> <20200429211641.9279-3-broonie@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200429211641.9279-3-broonie@kernel.org> 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-20200505_075647_770670_774129C7 X-CRM114-Status: UNSURE ( 8.27 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Catalin Marinas , Vincenzo Frascino , Kees Cook , 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 Wed, Apr 29, 2020 at 10:16:33PM +0100, Mark Brown wrote: > +#define SYM_FUNC_START(name) \ > + SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN) \ > + BTI_C > + > +#define SYM_FUNC_START_NOALIGN(name) \ > + SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE) \ > + BTI_C > + > +#define SYM_FUNC_START_LOCAL(name) \ > + SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN) \ > + BTI_C > + > +#define SYM_FUNC_START_LOCAL_NOALIGN(name) \ > + SYM_START(name, SYM_L_LOCAL, SYM_A_NONE) \ > + BTI_C > + > +#define SYM_FUNC_START_WEAK(name) \ > + SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN) \ > + BTI_C > + > +#define SYM_FUNC_START_WEAK_NOALIGN(name) \ > + SYM_START(name, SYM_L_WEAK, SYM_A_NONE) \ > + BTI_C > + > +#define SYM_INNER_LABEL(name, linkage) \ > + .type name SYM_T_NONE ASM_NL \ > + SYM_ENTRY(name, linkage, SYM_A_NONE) \ > + BTI_J This break building the compat vDSO: arch/arm64/kernel/vdso32/sigreturn.S: Assembler messages: arch/arm64/kernel/vdso32/sigreturn.S:20: Error: bad instruction `hint 34' arch/arm64/kernel/vdso32/sigreturn.S:30: Error: bad instruction `hint 34' arch/arm64/kernel/vdso32/sigreturn.S:41: Error: bad instruction `hint 34' arch/arm64/kernel/vdso32/sigreturn.S:51: Error: bad instruction `hint 34' clang-10: error: assembler command failed with exit code 1 (use -v to see invocation) I also see a scary linker warning about the native VDSO: aarch64-none-linux-gnu-ld: arch/arm64/kernel/vdso/vgettimeofday.o: warning: BTI turned on by -z force-bti when all inputs do not have BTI in NOTE section. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel