From patchwork Thu Sep 3 20:30:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11755025 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2E83813B1 for ; Thu, 3 Sep 2020 20:51:47 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 00AA92067C for ; Thu, 3 Sep 2020 20:51:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="AYgpRqRF"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="ChwOmTT2"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="W5E0fdTW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 00AA92067C Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:To:From:Subject:References:Mime-Version:Message-Id: In-Reply-To:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=JHR3RHmL2WzWrpM+XdWYMs1LYn42Bro9zb/LbFK14JM=; b=AYgpRqRF+Sq/+0e12AgAJfLJy qEzQiysAmsBIvagBgrQZJye86c0FHC4340Zuj9LOch7JRPYfp67EOVipQPtomqN++oZBJ3Ms+ESLf srU0c9X6FDFNVImIhwXyrPfP5oP7j8yP9iogp+iKUaGzm1BwsJ1az/iXilpV+eDC3Xu0v2nhPHU/O Ei9iqldwLrXaHbESaVSZ6ov9WJH6AFTXXTaGE8UlnyUZQHsa7joXOMWNU57I00KBkplxxB9/QXacZ HlMyzhn7lY2Cm94uFzujSRr0LVOZU3jPnm7XcVlk+Nb3uXi6nHJat0U7Sre5bycr4djIr4pzuyUyP esZWVRssQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kDwCi-0006Oc-Iy; Thu, 03 Sep 2020 20:51:32 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kDwBf-0005lz-6m for linux-arm-kernel@merlin.infradead.org; Thu, 03 Sep 2020 20:50:27 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:Cc:To:From:Subject: References:Mime-Version:Message-Id:In-Reply-To:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=DRdAryjq8aJ9FhWbdHsWSPKN6ISJIFMAFBJf/ilStC4=; b=ChwOmTT27WtmDi7fotGojhz2rF cYnInqfpRewkuVLo/jNpn+il2u4R6H8EGfL7TqBGVvGpbxAGTGYDNyVDytV+Cv4455ZFTcTuLw06w 2GMomFh/4xNh38KMGrox2KUpWn2YDYU4L9zHW1vaKUAsSXZGsi+vTe00t0IR50hv0a6GS/bkvRz7r vupiDW2uYqTpP8lCg/C5gZA+UA5i9ys23qeCAt8ozwl+/csk+MaebHPYXkpJB+Zw1mH9kr84eg0lM 9ukPTASOl5dfdEY/1UZYX4KfgsJD6YXhKYsq/fNu1ec5PTySnz6tLC6qCFSK/1y87NS7F/mmx/Byz KXV/cvcg==; Received: from mail-yb1-xb49.google.com ([2607:f8b0:4864:20::b49]) by casper.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kDvta-0003rP-RZ for linux-arm-kernel@lists.infradead.org; Thu, 03 Sep 2020 20:31:55 +0000 Received: by mail-yb1-xb49.google.com with SMTP id j20so4021802ybt.10 for ; Thu, 03 Sep 2020 13:31:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=DRdAryjq8aJ9FhWbdHsWSPKN6ISJIFMAFBJf/ilStC4=; b=W5E0fdTWYYpdRgGn3+mM1jE0Lnq94Ez+0wXBu2gCXs/Y+ie/fjFHxxGVxqs4iDjO61 XUhA7AwaMsRFv8vxG+A2l1ssqjpgTZnnYSVjKhst6YSRYn0OJjWUHRfPYs4kigu2qd4P t+7zq62XXAtCsJ6LJcQc5WI8i9ada15PY9rxQyYH3tgvVRCGIgzZ7AaRdUcs3DL9eEcC Mksgubm5f3YT2uHtXKoqiKJVJ82iqcQCdR5AMuaFyYG+/7pg3g10PdXI72qaqm/rzX7U +8H1VOT5Eb3eLUSsSkUJu8s7szptM4G6CN6v7v59SQ2mX07NJ6vsYtwXB5FrSylvGkOB +/fg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=DRdAryjq8aJ9FhWbdHsWSPKN6ISJIFMAFBJf/ilStC4=; b=LP7CYZl00EuJzE427hfWyv5lxyhyz95Pdb9zcbAKtt/ikkcwV2ok2BKGk3lhS9+fvG 19FWaLLbGaNnptgMlFaft9ha+BQlkD73+1W9bQdzc2XAx3Q07EvrQajXgjxtcbiTqgZ8 3zMFJ/rVXUWs8jghvVIvKvh/LupwopoEizF0UXsA+z1ytfSSy3rg+ZBfgsdwtHnZWssA rUQzUojgIIBcWedJ9GL0SaKFCKNnC+KSDrAjKWqt2bPjI6KF6/HpE0qUSPLujP9af0nS u7HTw40FG0Q8zhYY82OexUbUHe5oZxoeaymGJSGBMDK1yW5LprCzQvlE0tcf6BPRvR8y zj1g== X-Gm-Message-State: AOAM533mjXpGTQ1R1jq4UQ+DDR7JLwXiFZBD0ei1Vs7NGl4ixw//R4TY fps/9qpzal04yw2nPGyNR+GLw4Wrvkujq1RWZu8= X-Google-Smtp-Source: ABdhPJwiTOpKp1DNcc2Niuh9wmKZr2hpSpikSLbkfpniA2lBbifw5OwcLaWnbhau9OTVobvQsgnuxmwxleyw5C1VPmM= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:a25:ef07:: with SMTP id g7mr4300288ybd.448.1599165103083; Thu, 03 Sep 2020 13:31:43 -0700 (PDT) Date: Thu, 3 Sep 2020 13:30:48 -0700 In-Reply-To: <20200903203053.3411268-1-samitolvanen@google.com> Message-Id: <20200903203053.3411268-24-samitolvanen@google.com> Mime-Version: 1.0 References: <20200624203200.78870-1-samitolvanen@google.com> <20200903203053.3411268-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.526.ge36021eeef-goog Subject: [PATCH v2 23/28] arm64: vdso: disable LTO From: Sami Tolvanen To: Masahiro Yamada , Will Deacon X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200903_213147_047417_6095F86E X-CRM114-Status: GOOD ( 12.92 ) X-Spam-Score: -10.1 (----------) X-Spam-Report: SpamAssassin version 3.4.4 on casper.infradead.org summary: Content analysis details: (-10.1 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:b49 listed in] [list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.0 SPF_PASS SPF: sender matches SPF record -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM white-list 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.5 DKIMWL_WL_MED DKIMwl.org - Medium sender 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: linux-arch@vger.kernel.org, x86@kernel.org, Kees Cook , "Paul E. McKenney" , kernel-hardening@lists.openwall.com, Peter Zijlstra , Greg Kroah-Hartman , linux-kbuild@vger.kernel.org, Nick Desaulniers , linux-kernel@vger.kernel.org, Steven Rostedt , clang-built-linux@googlegroups.com, Sami Tolvanen , linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Disable LTO for the vDSO by filtering out CC_FLAGS_LTO, as there's no point in using link-time optimization for the small about of C code. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- arch/arm64/kernel/vdso/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index 45d5cfe46429..aa47070a3ccf 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -30,8 +30,8 @@ ldflags-y := -shared -nostdlib -soname=linux-vdso.so.1 --hash-style=sysv \ ccflags-y := -fno-common -fno-builtin -fno-stack-protector -ffixed-x18 ccflags-y += -DDISABLE_BRANCH_PROFILING -CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) $(GCC_PLUGINS_CFLAGS) -KBUILD_CFLAGS += $(DISABLE_LTO) +CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) $(GCC_PLUGINS_CFLAGS) \ + $(CC_FLAGS_LTO) KASAN_SANITIZE := n UBSAN_SANITIZE := n OBJECT_FILES_NON_STANDARD := y