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=-26.2 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,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 B98ADC433FE for ; Fri, 11 Dec 2020 20:19:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 78E6A23F38 for ; Fri, 11 Dec 2020 20:19:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406340AbgLKSsq (ORCPT ); Fri, 11 Dec 2020 13:48:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56188 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2406220AbgLKSsl (ORCPT ); Fri, 11 Dec 2020 13:48:41 -0500 Received: from mail-pg1-x54a.google.com (mail-pg1-x54a.google.com [IPv6:2607:f8b0:4864:20::54a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4C54C061A47 for ; Fri, 11 Dec 2020 10:46:57 -0800 (PST) Received: by mail-pg1-x54a.google.com with SMTP id f3so7119257pgg.9 for ; Fri, 11 Dec 2020 10:46:57 -0800 (PST) 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=sUICI29mkgxH8XDf6qhMCrhn46+Hzc1owynREvsajYA=; b=Mt5+qfjfZ+VylSyluHh2VZfop+oBL3rJXxZDwRaX22l0TfpVmfjZWdRRf4EjcTdwNZ tI2smkjeD1V9WDfLcVGcM0q3lBKc5wUlQ0PV2xNazny/qeDxBgjfBw3M6ZeazZiiVTRk PuilV1bsANPSfYl5rf4CFzgLv9TH7xZEN6ZdlxzmXfi8iZ0NN8yPkHKEhjrDZeO93M3Z Is2ezXs/oAG91woA/WjRTGjceaiPw8zQ6gbt9xphaeSWeIK5J0CKds3mJv3qxGB+SGOL yPRehVrtvjhUpPjpNJk+E+PHpWf8LAXA2fOr5tqj7a6NYji5/SC+3IO85wAjvRUlfz9n 9oSw== 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=sUICI29mkgxH8XDf6qhMCrhn46+Hzc1owynREvsajYA=; b=Qv7IEGi9XIWkcONaCnBaDHdBaT+szvGGGxY6YGOulI1slTJqJ7Dv8fT/wWGSw2zSUD tliMVtqAPeH0bdvg4rNa/8uwQJyLKiXZEOCJKEuHvM6FXLmwLu2nJj2Q+ZVag7G8sbO+ YBsQJsU1g2EJDkfTGCqPWzkCCh3I0331RonsOLqEyKeStfDJPauWr2WBFW9ZS6awF7Ua y/p6SrbCMniDWxtTMO1GgvjjDUJk+P5P90CHAfDdFz4uI/9lOrGdfDPmRMFvYRTvB4ba ceXB/ffW7/voAYDPg/cZ+U8o/FIOMFWjZ1D7G+PpuWkALxh99YzxrKKO8qnA4nFYkdNT uY+g== X-Gm-Message-State: AOAM532AjaxJrjirRSUVsMD54/Zh48nCNGxGRQiWPtgtWJikgw28Lklp ashOsLlv8UITUMEbWG6ERiZAiE29OSaeL06VU74= X-Google-Smtp-Source: ABdhPJyLTnaXTvQFzdGZbemjJUsFLRdMqMxsuXqAqm5rCyQnrHrKDgTVs/Qim5syv8mGMDSyRXsRkeSRJzrM/1+uvUc= 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:a17:902:8343:b029:da:cf6a:f65c with SMTP id z3-20020a1709028343b02900dacf6af65cmr12048006pln.5.1607712417071; Fri, 11 Dec 2020 10:46:57 -0800 (PST) Date: Fri, 11 Dec 2020 10:46:28 -0800 In-Reply-To: <20201211184633.3213045-1-samitolvanen@google.com> Message-Id: <20201211184633.3213045-12-samitolvanen@google.com> Mime-Version: 1.0 References: <20201211184633.3213045-1-samitolvanen@google.com> X-Mailer: git-send-email 2.29.2.576.ga3fc446d84-goog Subject: [PATCH v9 11/16] scripts/mod: disable LTO for empty.c From: Sami Tolvanen To: Masahiro Yamada , Steven Rostedt , Will Deacon Cc: Josh Poimboeuf , 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, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With CONFIG_LTO_CLANG, clang generates LLVM IR instead of ELF object files. As empty.o is used for probing target properties, disable LTO for it to produce an object file instead. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- scripts/mod/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile index 78071681d924..c9e38ad937fd 100644 --- a/scripts/mod/Makefile +++ b/scripts/mod/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 OBJECT_FILES_NON_STANDARD := y +CFLAGS_REMOVE_empty.o += $(CC_FLAGS_LTO) hostprogs-always-y += modpost mk_elfconfig always-y += empty.o -- 2.29.2.576.ga3fc446d84-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=-16.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 8D142C433FE for ; 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Fri, 11 Dec 2020 10:46:57 -0800 (PST) Date: Fri, 11 Dec 2020 10:46:28 -0800 In-Reply-To: <20201211184633.3213045-1-samitolvanen@google.com> Message-Id: <20201211184633.3213045-12-samitolvanen@google.com> Mime-Version: 1.0 References: <20201211184633.3213045-1-samitolvanen@google.com> X-Mailer: git-send-email 2.29.2.576.ga3fc446d84-goog Subject: [PATCH v9 11/16] scripts/mod: disable LTO for empty.c From: Sami Tolvanen To: Masahiro Yamada , Steven Rostedt , Will Deacon X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201211_134701_183470_11AC5652 X-CRM114-Status: GOOD ( 12.02 ) 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, 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, linux-pci@vger.kernel.org, clang-built-linux@googlegroups.com, Sami Tolvanen , Josh Poimboeuf , 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 With CONFIG_LTO_CLANG, clang generates LLVM IR instead of ELF object files. As empty.o is used for probing target properties, disable LTO for it to produce an object file instead. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- scripts/mod/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile index 78071681d924..c9e38ad937fd 100644 --- a/scripts/mod/Makefile +++ b/scripts/mod/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 OBJECT_FILES_NON_STANDARD := y +CFLAGS_REMOVE_empty.o += $(CC_FLAGS_LTO) hostprogs-always-y += modpost mk_elfconfig always-y += empty.o -- 2.29.2.576.ga3fc446d84-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=-26.2 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,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 13C56C4167B for ; Fri, 11 Dec 2020 18:48:36 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id 42F0C23F37 for ; Fri, 11 Dec 2020 18:48:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 42F0C23F37 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-20593-kernel-hardening=archiver.kernel.org@lists.openwall.com Received: (qmail 9378 invoked by uid 550); 11 Dec 2020 18:47:10 -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 9287 invoked from network); 11 Dec 2020 18:47:09 -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=sUICI29mkgxH8XDf6qhMCrhn46+Hzc1owynREvsajYA=; b=Mt5+qfjfZ+VylSyluHh2VZfop+oBL3rJXxZDwRaX22l0TfpVmfjZWdRRf4EjcTdwNZ tI2smkjeD1V9WDfLcVGcM0q3lBKc5wUlQ0PV2xNazny/qeDxBgjfBw3M6ZeazZiiVTRk PuilV1bsANPSfYl5rf4CFzgLv9TH7xZEN6ZdlxzmXfi8iZ0NN8yPkHKEhjrDZeO93M3Z Is2ezXs/oAG91woA/WjRTGjceaiPw8zQ6gbt9xphaeSWeIK5J0CKds3mJv3qxGB+SGOL yPRehVrtvjhUpPjpNJk+E+PHpWf8LAXA2fOr5tqj7a6NYji5/SC+3IO85wAjvRUlfz9n 9oSw== 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=sUICI29mkgxH8XDf6qhMCrhn46+Hzc1owynREvsajYA=; b=Qoheqv8qnj1xltfDlSs4S4LH9t2SWtDhg5U8P2NvcEEFmY7T2q/hbbK+V5afSY00+n Ibc1Cj7Nomjn/irJbi91eZd5Jem3Fef8eVCMZCDRUQ86V6SgccwZsKfBrJNnkKRMVaJD 6rrd0Sf6P+dvWC+6Utc8IeKCF6s3VZp3nis8kUE8juvQS07/YE0dwLirVZkKd1zNsDtj CnoOzXRMD0m4hBW9kgMOWwXjxpmvwdOD2nuyqAppp30aR/sNtdhSow226qwfPDB05838 u+63e5ORtC9KDPUFISG8IFl2xVHNh/m7dEwuZ338T11x5ydqI1hgODXQCKKd8t6Yn8L+ id6g== X-Gm-Message-State: AOAM533QzARzd+FRJNHaSxYSUbzkNChfQF9Cr09769+r5U9FO/uCO+Fi u4v69F9XJDgbIRpx/ejE/QAw3jLSQypMFQ/DAHg= X-Google-Smtp-Source: ABdhPJyLTnaXTvQFzdGZbemjJUsFLRdMqMxsuXqAqm5rCyQnrHrKDgTVs/Qim5syv8mGMDSyRXsRkeSRJzrM/1+uvUc= 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:a17:902:8343:b029:da:cf6a:f65c with SMTP id z3-20020a1709028343b02900dacf6af65cmr12048006pln.5.1607712417071; Fri, 11 Dec 2020 10:46:57 -0800 (PST) Date: Fri, 11 Dec 2020 10:46:28 -0800 In-Reply-To: <20201211184633.3213045-1-samitolvanen@google.com> Message-Id: <20201211184633.3213045-12-samitolvanen@google.com> Mime-Version: 1.0 References: <20201211184633.3213045-1-samitolvanen@google.com> X-Mailer: git-send-email 2.29.2.576.ga3fc446d84-goog Subject: [PATCH v9 11/16] scripts/mod: disable LTO for empty.c From: Sami Tolvanen To: Masahiro Yamada , Steven Rostedt , Will Deacon Cc: Josh Poimboeuf , 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, Sami Tolvanen Content-Type: text/plain; charset="UTF-8" With CONFIG_LTO_CLANG, clang generates LLVM IR instead of ELF object files. As empty.o is used for probing target properties, disable LTO for it to produce an object file instead. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- scripts/mod/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile index 78071681d924..c9e38ad937fd 100644 --- a/scripts/mod/Makefile +++ b/scripts/mod/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 OBJECT_FILES_NON_STANDARD := y +CFLAGS_REMOVE_empty.o += $(CC_FLAGS_LTO) hostprogs-always-y += modpost mk_elfconfig always-y += empty.o -- 2.29.2.576.ga3fc446d84-goog