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=-20.9 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 0E02EC47420 for ; Tue, 29 Sep 2020 21:48:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B93F620789 for ; Tue, 29 Sep 2020 21:48:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jeIjKmg7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729474AbgI2Vsl (ORCPT ); Tue, 29 Sep 2020 17:48:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48434 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729251AbgI2Vrq (ORCPT ); Tue, 29 Sep 2020 17:47:46 -0400 Received: from mail-qk1-x749.google.com (mail-qk1-x749.google.com [IPv6:2607:f8b0:4864:20::749]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 34EDFC0613E2 for ; Tue, 29 Sep 2020 14:47:29 -0700 (PDT) Received: by mail-qk1-x749.google.com with SMTP id k124so3681655qkc.13 for ; Tue, 29 Sep 2020 14:47:29 -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=DIPWfuOfjnS0FLqqhnzrIZ4jlncEeE+o+vZP3RuRCL0=; b=jeIjKmg7IRS+l/ui8Q+LF8nOaIvlsjsr5dJcnvSqyimVjw+fgPn/vAjJUtO4XmZBa6 Xd0TPg2PXsxw8JWRlXMof9WtQxCvHX0ajUKKZHY+h9ZrQj/vHt4kd3uCJRU76eVTlT3l qvq/mdBiAQCfz0NkdrERe4By8JjkFVxXJhBvXJYakKcsE9Q3uXpA4c2ihpOBil6Arsgm /XRIkE6YivpM0yPirN/ctrfV5AzOopT2G8KpjaFwIzwdIty+tJ9NNd0YLGlPN6mpQHOt PZmo5ltSZAvrWwfyVtCxNb3oLaXN5GzVBEfApucjE1oqsSv0iOxejixTaxe7xLdJuwWh mCjw== 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=DIPWfuOfjnS0FLqqhnzrIZ4jlncEeE+o+vZP3RuRCL0=; b=UUsKPm/qM3vqJiT2CVhSWSTCKqXTmuNd5XsVI3I4wylAI5iIeg/ZDcm/9+cSbmBE4s 4oQ8haqf59x0Zp3D0ZsNd50nenxRIquPLQMx2cladaMoEXxeIgtMZSaUamiANwT4uoMv /2g35oiWZRdnDIlahe9uy4p9W3t/wco9NNlrQfNFAoH5AWdeujz/RUpj5Pj64UKHD5Zi 2t0EJPzskrIkNNQ5hQo1d4Sdt9zojZ8PiWByzddlpogc7Pqih6ot9WxCyAx8JQK4Jt41 CSiHWhaoCHNKq4GiNaUkICnVN3jNHMalK1lZJmc37bIL3E92OFASRQ5+iMSoMw8qESUy uBcg== X-Gm-Message-State: AOAM530XfSn+Ncgh3DQD5Pc0ozwHzJBZ9vTImjuwpHpxSiW9r5jMPy+i rMdWkgiXp+vb1X0pirWWjn8OKEaLr5u00o1pizA= X-Google-Smtp-Source: ABdhPJxh9cX/NQWJyeaf5NLdRHxlNrjwWH6kgp9BcYdpdAAl3zdkTlK7VGeQKrVU7UdbXnmP9NjmecTJ1e08yzk/vjU= Sender: "samitolvanen via sendgmr" X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:a0c:b308:: with SMTP id s8mr6728794qve.16.1601416048309; Tue, 29 Sep 2020 14:47:28 -0700 (PDT) Date: Tue, 29 Sep 2020 14:46:26 -0700 In-Reply-To: <20200929214631.3516445-1-samitolvanen@google.com> Message-Id: <20200929214631.3516445-25-samitolvanen@google.com> Mime-Version: 1.0 References: <20200929214631.3516445-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.709.gb0816b6eb0-goog Subject: [PATCH v4 24/29] arm64: vdso: disable LTO From: Sami Tolvanen To: Masahiro Yamada , Will Deacon , Steven Rostedt Cc: Peter Zijlstra , Greg Kroah-Hartman , "Paul E. McKenney" , Kees Cook , Nick Desaulniers , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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 | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index e836e300440f..aa47070a3ccf 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -30,7 +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) +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 -- 2.28.0.709.gb0816b6eb0-goog 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=-10.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED,USER_AGENT_GIT 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 5F8C4C4727C for ; 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Tue, 29 Sep 2020 14:47:28 -0700 (PDT) Date: Tue, 29 Sep 2020 14:46:26 -0700 In-Reply-To: <20200929214631.3516445-1-samitolvanen@google.com> Message-Id: <20200929214631.3516445-25-samitolvanen@google.com> Mime-Version: 1.0 References: <20200929214631.3516445-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.709.gb0816b6eb0-goog Subject: [PATCH v4 24/29] arm64: vdso: disable LTO From: Sami Tolvanen To: Masahiro Yamada , Will Deacon , Steven Rostedt X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200929_174733_573226_E3C1D7A1 X-CRM114-Status: GOOD ( 11.84 ) 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, clang-built-linux@googlegroups.com, Sami Tolvanen , linux-pci@vger.kernel.org, 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+linux-arm-kernel=archiver.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 | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index e836e300440f..aa47070a3ccf 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -30,7 +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) +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 -- 2.28.0.709.gb0816b6eb0-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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=-20.9 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable 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 D503DC4727C for ; Tue, 29 Sep 2020 21:50:40 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id E311A2076D for ; Tue, 29 Sep 2020 21:50:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jeIjKmg7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E311A2076D Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-20054-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 3156 invoked by uid 550); 29 Sep 2020 21:47:40 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Received: (qmail 2012 invoked from network); 29 Sep 2020 21:47:40 -0000 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=DIPWfuOfjnS0FLqqhnzrIZ4jlncEeE+o+vZP3RuRCL0=; b=jeIjKmg7IRS+l/ui8Q+LF8nOaIvlsjsr5dJcnvSqyimVjw+fgPn/vAjJUtO4XmZBa6 Xd0TPg2PXsxw8JWRlXMof9WtQxCvHX0ajUKKZHY+h9ZrQj/vHt4kd3uCJRU76eVTlT3l qvq/mdBiAQCfz0NkdrERe4By8JjkFVxXJhBvXJYakKcsE9Q3uXpA4c2ihpOBil6Arsgm /XRIkE6YivpM0yPirN/ctrfV5AzOopT2G8KpjaFwIzwdIty+tJ9NNd0YLGlPN6mpQHOt PZmo5ltSZAvrWwfyVtCxNb3oLaXN5GzVBEfApucjE1oqsSv0iOxejixTaxe7xLdJuwWh mCjw== 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=DIPWfuOfjnS0FLqqhnzrIZ4jlncEeE+o+vZP3RuRCL0=; b=gyXC+wUTMXGeMQLXkr2dfG3n6aChQ3ePKEuIT9AjQa93s94bH3etQvk/7fMkWdydlY uWnzGFnX7vLbvU7wcS5WDGoJy4+ZpT4mNSTzXS5RotXZIvUeECA8cd3n8O/bAWgtbEYI hw34qWqO16/lWo8p3xNadlzxClMSpTgaGJrvJxib93xyOU0jNLnW7FouFir4iQy7XsqT GdDa/LC+PopZ2fYEQPu8ddvPX4RNjHQxMbt/QhISrbCPcFaE0V7oQimAM+OLAKEmtLFB uGisCM2dK/9Vn4CfxEenPw5a4QGiIe5ZnflG4KPJ1NunUDXHjX4OCPnYrSNehNR2IiX9 9vVg== X-Gm-Message-State: AOAM532OkxSEiMwiRrw+EOquRbGEH/kWPuOR8yihCeEFcxr1M3+jgjjm FBH7FzPsYxgXp7Y0gqA15hsFFrPP/N6CORvV8TU= X-Google-Smtp-Source: ABdhPJxh9cX/NQWJyeaf5NLdRHxlNrjwWH6kgp9BcYdpdAAl3zdkTlK7VGeQKrVU7UdbXnmP9NjmecTJ1e08yzk/vjU= Sender: "samitolvanen via sendgmr" X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:a0c:b308:: with SMTP id s8mr6728794qve.16.1601416048309; Tue, 29 Sep 2020 14:47:28 -0700 (PDT) Date: Tue, 29 Sep 2020 14:46:26 -0700 In-Reply-To: <20200929214631.3516445-1-samitolvanen@google.com> Message-Id: <20200929214631.3516445-25-samitolvanen@google.com> Mime-Version: 1.0 References: <20200929214631.3516445-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.709.gb0816b6eb0-goog Subject: [PATCH v4 24/29] arm64: vdso: disable LTO From: Sami Tolvanen To: Masahiro Yamada , Will Deacon , Steven Rostedt Cc: Peter Zijlstra , Greg Kroah-Hartman , "Paul E. McKenney" , Kees Cook , Nick Desaulniers , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" 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 | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index e836e300440f..aa47070a3ccf 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -30,7 +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) +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 -- 2.28.0.709.gb0816b6eb0-goog