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=-20.4 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 B29E1C43467 for ; Fri, 9 Oct 2020 16:14:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60E3B22261 for ; Fri, 9 Oct 2020 16:14:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="icGF2o4B" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389720AbgJIQOz (ORCPT ); Fri, 9 Oct 2020 12:14:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41614 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389779AbgJIQOX (ORCPT ); Fri, 9 Oct 2020 12:14:23 -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 9DEA2C0613D8 for ; Fri, 9 Oct 2020 09:14:21 -0700 (PDT) Received: by mail-qk1-x749.google.com with SMTP id v190so4698489qki.21 for ; Fri, 09 Oct 2020 09:14:21 -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=IWlwO4V8zfIKj2VoQVJSOpIzEd6XIOwNzizfhzYsm+I=; b=icGF2o4BoUC5H7jDfDcqIeIDmztt1DX3EBV4AR9CIZel1UdghtV62q3fzjA81E5ME4 x9g3yQfuIaLSgx21c6ABnIjUmaI4VqxjY4B5WnUXRoUb92nAtC/XbQPpxdBRAKJqH+qH jcvBMX8XEpz4rNBFWhnnnRs6RxEEg7NtFbXbUMhmEcBsm9ep+5oJx3BqoMUfqRJe9eh+ HQV2rljyVTcunwoXwynW5GLctChORkFUDmM1/j1sk+6+WxF8Dg5/LcVdGd37dGhF+GtO M9aoDBKTtmJg2M/huHN2yYE2hfJUvsC+WO6y4SzBmnETs4aTNvX9A0N+1ApFOCsrkyFd VCjQ== 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=IWlwO4V8zfIKj2VoQVJSOpIzEd6XIOwNzizfhzYsm+I=; b=F0VkWVmHV6myffFOBFt3Fso/G15TBLTepGd7I+rvJpecdbpcDyxHchSqJ8U5VwUdWv hzYpYEAom4fq9I029RbhCC2NFtVzIDXcspYZm81qI0R5irOsPCH/yA9Y4TpauJzO5vjo VUtnJzZLUgkqNhCs7htqfo4MNLjoWf3uOzE+53+tRM9dL2Rjj3bC9uBMM/BYBo4A/36l h63uzhPSmmywc5M9PTCbKZZCf3rMrXs8oFhzzsPL7Un9xe/p5AI9sSBSVRWhRIBnzFJy O2Dxf249eJjXw3NjZZPT0/y5pukDfK2JNGCe8gBXBB6drBIqk2QN/Yo+PbbRDJFD2iid rxrQ== X-Gm-Message-State: AOAM533lMPPiDM+hrxvE6PFhKLxcuXq/3n5eC5N2VgJiVcSj4iat20r3 /MfuZKP4+zT0P647x1dZmskfkjbsGSens2y4AjE= X-Google-Smtp-Source: ABdhPJxEWHAvyNkdIDlQRKJ2smQRYfbTU12bNHGd7NqYEmxH7inHJ1sIHSNvQnTIBhdfm/bIQe6W23Fz9FB7iOfrFU0= 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:ad4:43e5:: with SMTP id f5mr13905635qvu.12.1602260060762; Fri, 09 Oct 2020 09:14:20 -0700 (PDT) Date: Fri, 9 Oct 2020 09:13:29 -0700 In-Reply-To: <20201009161338.657380-1-samitolvanen@google.com> Message-Id: <20201009161338.657380-21-samitolvanen@google.com> Mime-Version: 1.0 References: <20201009161338.657380-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.1011.ga647a8990f-goog Subject: [PATCH v5 20/29] efi/libstub: 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-kbuild@vger.kernel.org With CONFIG_LTO_CLANG, we produce LLVM bitcode instead of ELF object files. Since LTO is not really needed here and the Makefile assumes we produce an object file, disable LTO for libstub. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- drivers/firmware/efi/libstub/Makefile | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index 0c911e391d75..e927876f3a05 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -36,6 +36,8 @@ KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \ # remove SCS flags from all objects in this directory KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) +# disable LTO +KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_LTO), $(KBUILD_CFLAGS)) GCOV_PROFILE := n # Sanitizer runtimes are unavailable and cannot be linked here. -- 2.28.0.1011.ga647a8990f-goog