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=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 AF6A7C43466 for ; Fri, 18 Sep 2020 20:17:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 56FBC207D3 for ; Fri, 18 Sep 2020 20:17:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jYUGHI1s" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726467AbgIRUPD (ORCPT ); Fri, 18 Sep 2020 16:15:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52788 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726445AbgIRUPD (ORCPT ); Fri, 18 Sep 2020 16:15:03 -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 B4308C0613E4 for ; Fri, 18 Sep 2020 13:15:00 -0700 (PDT) Received: by mail-qk1-x749.google.com with SMTP id o28so5534981qkm.23 for ; Fri, 18 Sep 2020 13:15:00 -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=I0YLtwhWjc07CuFqeB5q66ZrbEvcoZ20B6+f9QGQIyM=; b=jYUGHI1s8CrS/sSNFTlA7rmGo0aE0IxsOvco8+3mbGmxJ9XXGBu6oJrmFB8WRKT0qU zy//LwT+zYYBdAukM8OYIDIlT0g/nSfyiohg2buo5UUTX5oxMiibN0IAZdFZeUFX43do J75Ez99j+amuAzoOHQ0FFpTbHxdaoahEQ7mXskyDoQ20jhkMYFi95nSwiM3fgkSylPUu CgNcTGMuPTBF1DZs6+MnIXUHE0THEx4HxmF1Qc5rm1DW1zfnCq0VNXbuVkgxBrHhGtkl Jtq5TVNiA8w8V4hj/3o5nuATv73gM7CpTJhyuPWJPzpN9VmwWFkxnAAGfCAkUKsGwXZb /0Fg== 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=I0YLtwhWjc07CuFqeB5q66ZrbEvcoZ20B6+f9QGQIyM=; b=fQoaNVK84hEMbr5ma/Vc3FRqQClxCwoR5lkFTSWyyJc4GD9Qokb/V+HuZR4cXR9SL7 0WlDk0MdN2rEmBq9i64hdohfWr0IkojJWhETvZDWPTYnG+torg0RQNK3wA7pOCzHatD2 /zJgYAXfm6jxiXVymfMpMU8JUze5LC53qm4ueJQY1lL2IlgECEBPC6LHeyU93DhYUDRx myBwWlEdaj392iYdNbr0ygkSG2/BzCzFRuDfOq/So/vAMRNOB/R3M5MqsLRE72KhKvB7 BUVJ1QZ2Tgo+ZKPMPVAi38I7HbwRGkxF8ypQgHH2gkfwtoY6g9cFIph2eLcg5cR+t+s3 jwmw== X-Gm-Message-State: AOAM533V1MniPTYiaQdDBkO9Yg66JN4bHHVRRiPqfjVidrWrYTmjKqd3 El1/hZdxU1BSHRPhnMcJfpdIrqaSoC0XiBGP8s0= X-Google-Smtp-Source: ABdhPJz8YsEPOq657LzaNLkjWdjXppy9+ITNLo8GCqthbQa6sHwPiOQhQjOantZ7VXaLO7lFT1ulWYm9Ne5qkWpjkw4= 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:ad4:5a0e:: with SMTP id ei14mr20723233qvb.15.1600460099899; Fri, 18 Sep 2020 13:14:59 -0700 (PDT) Date: Fri, 18 Sep 2020 13:14:15 -0700 In-Reply-To: <20200918201436.2932360-1-samitolvanen@google.com> Message-Id: <20200918201436.2932360-10-samitolvanen@google.com> Mime-Version: 1.0 References: <20200918201436.2932360-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.681.g6f77f65b4e-goog Subject: [PATCH v3 09/30] x86, build: use objtool mcount From: Sami Tolvanen To: Masahiro Yamada , Will Deacon Cc: Peter Zijlstra , Steven Rostedt , 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-arch@vger.kernel.org Select HAVE_OBJTOOL_MCOUNT if STACK_VALIDATION is selected to use objtool to generate __mcount_loc sections for dynamic ftrace with Clang and gcc <5 (later versions of gcc use -mrecord-mcount). Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 7101ac64bb20..6de2e5c0bdba 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -163,6 +163,7 @@ config X86 select HAVE_CMPXCHG_LOCAL select HAVE_CONTEXT_TRACKING if X86_64 select HAVE_C_RECORDMCOUNT + select HAVE_OBJTOOL_MCOUNT if STACK_VALIDATION select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS select HAVE_DYNAMIC_FTRACE -- 2.28.0.681.g6f77f65b4e-goog