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 7A532C388F2 for ; Tue, 13 Oct 2020 02:41:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 25DDC21D7F for ; Tue, 13 Oct 2020 02:41:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="IdXB04m+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727265AbgJMAcX (ORCPT ); Mon, 12 Oct 2020 20:32:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47720 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727256AbgJMAcT (ORCPT ); Mon, 12 Oct 2020 20:32:19 -0400 Received: from mail-pl1-x649.google.com (mail-pl1-x649.google.com [IPv6:2607:f8b0:4864:20::649]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B6BE8C0613D1 for ; Mon, 12 Oct 2020 17:32:17 -0700 (PDT) Received: by mail-pl1-x649.google.com with SMTP id v6so13036220plo.3 for ; Mon, 12 Oct 2020 17:32:17 -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=xL7tn5bk8rd7QhzERnW5XDCxrWNQLuaGbP7lLdALs6Y=; b=IdXB04m+VIhq9Ywfk+Q6SdQxAtxltKDIhWNIfo+jhdLwgrlbdcpJkCD1dg60k4KicG 1IgqLYFzJP4YEVrqWrx9pldSCsrIUIQZ+WBgBNy02BbQgKQE7dyYmjEiSSvKFbyI2xXj TV/V2tWK25kaN3vgAN5S+M0sENDBoc3aH1FQDGeTof6qqw+rbjH3bLU8q4fusukkB6D6 mAux60p4YIG3jSjYIx2pWv96v7XCJ9hy4Ka8a16xDIx9CMpYSDwuHtmOn9Zpz0sBYoxo n76+DpbDHdACleamKfcxERH+Pqgb3G4b5AAOxxW5ydqXddcuIHi5FDSPpeBjiqI6FIaq F5XQ== 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=xL7tn5bk8rd7QhzERnW5XDCxrWNQLuaGbP7lLdALs6Y=; b=Pfu9YJjcfNxuZegczVGhN4DlcAeOvvfMEWUosSh0gH5s/xR2lNXMKq+3AEEaAg5H8s YivVV8lb5+gG/NPfvI66Wq0BhYmD7u9zQXOis2ouCIxnFPV3CVvk1eo2W+ss8linLpJa dwFTAWkEY9RktR5FZjqGokHgzPyUKUl2TPxy7WcH89SNTXJV7chbvgn3Q2tYXfSU4jQV lIjzW7ufqxuPj7sjwt+/CbZqXzkLXfg0SUUXmLtWXBt8YcHDzMpe7HboID/OiUBPcPig Bxmh72XBAN5vtzsfIhnfRI/N/PVRO2mUZROinDi7L/JclZ523FR+JQrZm1oZQonTjPxK TVng== X-Gm-Message-State: AOAM532Rzu58rOs8ZxZIjd2xA7d/sIqCybFYRhNX/b/txn7NWVEopN09 2PTChICR+xiWZzYCfxkAdsSHE3jMFrYQ8QK7/oU= X-Google-Smtp-Source: ABdhPJzmHD4XCersd5eY8ZPVkbKw3ea3PfM0fSiP3AGN8FM08tkamilxzFI74ZhTfsYbcW37PW4YYLWgNBpJiUusVu4= 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:aa7:9a87:0:b029:156:5806:b478 with SMTP id w7-20020aa79a870000b02901565806b478mr3079925pfi.8.1602549137181; Mon, 12 Oct 2020 17:32:17 -0700 (PDT) Date: Mon, 12 Oct 2020 17:31:44 -0700 In-Reply-To: <20201013003203.4168817-1-samitolvanen@google.com> Message-Id: <20201013003203.4168817-7-samitolvanen@google.com> Mime-Version: 1.0 References: <20201013003203.4168817-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.1011.ga647a8990f-goog Subject: [PATCH v6 06/25] x86, build: use objtool mcount From: Sami Tolvanen To: Masahiro Yamada , Steven Rostedt Cc: Will Deacon , 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 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 5e832fd520b5..6d67646153bc 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 -- 2.28.0.1011.ga647a8990f-goog