From patchwork Tue Sep 29 21:46:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11807105 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 244DD139F for ; Tue, 29 Sep 2020 21:48:08 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id 67F5021734 for ; Tue, 29 Sep 2020 21:48:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ZTQa+nx+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 67F5021734 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-20038-patchwork-kernel-hardening=patchwork.kernel.org@lists.openwall.com Received: (qmail 28075 invoked by uid 550); 29 Sep 2020 21:47:02 -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: Delivered-To: mailing list kernel-hardening@lists.openwall.com Received: (qmail 27964 invoked from network); 29 Sep 2020 21:47:01 -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=wzTjCzGg3xaEC7ll/kCd4uRGsOqMFFvk2QDCKEKZJPs=; b=ZTQa+nx+ie2V6Hl+EgZ3b9a4nWf6aHDxI2ozXvg7twHaKP6+FN6wo15J3NYUHL6MZy J4Dd+alK6yoV9vbFjsbkRKSroxIwAfTac5LcIIobI37oTx5CMMXDG5PaPNUMt11LwL8e qaWpUR1BPcieUI39Ur38/bJEEGCMg2IEQV7e2ugbrGtg++DfsB4wweV1KXsP1t+8DXDm JeGZ4Z7BrxXuG2djrCReKQukEvOz+cyKSm1LRUENFyizVwreuzCNtUFRYYSNx4ge/Lh7 V+phKEE5IsRMyJIFN5ljmvpZV5Qkvt76Ais9ZtPypytr0PvQL98a/0aQ5/yCoymbWkrC MGDQ== 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=wzTjCzGg3xaEC7ll/kCd4uRGsOqMFFvk2QDCKEKZJPs=; b=EAFmVmHPrqMZxbMPwRUiwEqcHPvgv7ts1VmKmv8Ad09wgpQUYJRei1vsEYyDGs6h28 Ayrygb7yaN6kInYW+PUQ2JEL9VjqQvvusF5qVxtczcGWhrSFg5droIR+PJhN8a42DRrd Gob+u7W862Jky38jsJk5TMiO2XMCUrRgsd6dj+XF0/fQEyIHsdr7n6TEVEPPhd+SyObY Rgq+RleoB28ZAKv7M0BcPdQMMlhILLWPw5U9+oO815cK79mwsgtyfn6Vobm+3qi8g6fa OQG7DlKRqOcE/7oG/6lJ9o0L7WWczSO6IxkVvPdpie+56iGQ0WZqKLMfO7Hgz8ivOK6u nLQQ== X-Gm-Message-State: AOAM5317DsMoNHmOJwRGfwZKf7aeN4iH6qCNh1zOO0jZo/otCl3M9eN/ 2ObGqu4W6u1YSTnJwiK31xLQANZmsIOcaAXQF6U= X-Google-Smtp-Source: ABdhPJz2ypRSC9mllfNnIhgyfpZXn6C3IOzuDT16CdCuKPyuF6U9OOcO8z3rZ0bOQ0QtPSPEFo5uPG0gQq+yj7Gtb6I= 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:ad4:58e3:: with SMTP id di3mr6759116qvb.54.1601416009709; Tue, 29 Sep 2020 14:46:49 -0700 (PDT) Date: Tue, 29 Sep 2020 14:46:10 -0700 In-Reply-To: <20200929214631.3516445-1-samitolvanen@google.com> Message-Id: <20200929214631.3516445-9-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 08/29] x86, build: use objtool mcount 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 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