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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 94D9FC433E0 for ; Wed, 24 Jun 2020 20:35:50 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 698E3206C0 for ; Wed, 24 Jun 2020 20:35:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="VsVtVs0K"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="IfZnlNH6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 698E3206C0 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:To:From:Subject:References:Mime-Version:Message-Id: In-Reply-To:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=isSQSQ50a0Sifqe96erwV8z9fNOgFHuFtTYXv1etYrw=; b=VsVtVs0KqbEvKqqL8Nx1sCH8s aaD2S6gUMmNaDeumDil8zM9qJTFb7+FXNUUrX9j4ZBAZgpDTDm5wm0gHPH+FMQGOQxF1YHIqL0NpQ Q8zpRNyYjBsh+YzdLxWseVhKQj9QDV3N3xDv7bECvtMumx2MOUikj8dMtiMDZfAmL4a03es+rHkQA stO72EKLfJrqVl80FabuGnjI3h3K1PSCPicKoHVCWfIt5iH2aRxIW9058OS6d+hxyqKSMb0DoaZeR LupFvpzf4UygEGa4+VZR+dQHJHcdekwqNIwBaHGZSFynJLZ3y1Zv/hjbdxYgcokC0QQecxV7KAzD8 h9nHaReig==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1joC5b-0007LT-6P; Wed, 24 Jun 2020 20:33:47 +0000 Received: from mail-qt1-x849.google.com ([2607:f8b0:4864:20::849]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1joC4z-00074y-JQ for linux-arm-kernel@lists.infradead.org; Wed, 24 Jun 2020 20:33:11 +0000 Received: by mail-qt1-x849.google.com with SMTP id e4so2428612qtd.13 for ; Wed, 24 Jun 2020 13:33:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=E72RKePZ9QWe5v89HuDG9dmOi1TM58THK6MPfXGAxFQ=; b=IfZnlNH6VN1h5kv70OdYXiwpqxbG8Fsr0lLuwZMxg60FtsN9/VTg/yfhaEKY69+/+Y hyTqsTQRwHJPTGJCgx79BwJ5QVcEKyLgdthjRqbiH95tnfQghy4dm0yUNuDWrYAYeuQK bXlz5RTuRnG7qvLP46Ux6LdFVV3vgejq+f8vMdwP7C0ECe86rxVnbt4+28XS5oy0e//W 3PvqoaOrjXwuF1y+TVGpByJgFdYpZGp3bhGDnuXbGiV8bnYHuHTTFlOLOu5U7PsEVYbS zVdr70MPwdtPFtMyvFviHewEzUoy8KN1TAyWLRedjTg9ydVnxrcpJqLiET5LocVJTpl1 qi7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=E72RKePZ9QWe5v89HuDG9dmOi1TM58THK6MPfXGAxFQ=; b=fgkuUwxiAfbL88o39UZKehmWrZYoNQaEHa/XoD9sZweylxNVZCganzyQ6ErDLXUksP c4JPysNm+OYAa7+1YLmpOZQeB/biAQkaXKDV9Mw8+Nf4jHD2U++4HpbG4RvSNk2D2SzB ZJY5KIT+W0ENB8SAA2YHbqPk4d1I7r4JQ6ZnuGB6sHsAb53yoqG0ieOgB7EpU7DiObSN i7a75VGYd2Xl6hQsTwxNwpzdsiVOxxn1d3V0Xg4rgkxEExn3+vmKglOW5OIL9nl3ZNgK e/uzeO+7fOIe16JsSTdgmGovAf6sDBs8RIqQN+J+fUrgejVp+n2SXIcbZJcgNngvuSCd Rj7A== X-Gm-Message-State: AOAM530gP9A/wji5pSxpf2pNXwm1TJtitOEBTGQIpi1eWUfj3ytnlJNd ODHXRCqN7WKflIOvSOSVVWhZjtTPaB23W/MLulQ= X-Google-Smtp-Source: ABdhPJzd9lgxY2ziJprOU0r6YQs1Hj+qf3c3VygR/GB4VeUCqKevsyTn5UTRuuuhSmVDqX6i9sr8ukJjhli7wtRCXdI= X-Received: by 2002:a0c:85a3:: with SMTP id o32mr8043763qva.189.1593030786670; Wed, 24 Jun 2020 13:33:06 -0700 (PDT) Date: Wed, 24 Jun 2020 13:31:43 -0700 In-Reply-To: <20200624203200.78870-1-samitolvanen@google.com> Message-Id: <20200624203200.78870-6-samitolvanen@google.com> Mime-Version: 1.0 References: <20200624203200.78870-1-samitolvanen@google.com> X-Mailer: git-send-email 2.27.0.212.ge8ba1cc988-goog Subject: [PATCH 05/22] kbuild: lto: postpone objtool From: Sami Tolvanen To: Masahiro Yamada , Will Deacon 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, x86@kernel.org, Kees Cook , "Paul E. McKenney" , kernel-hardening@lists.openwall.com, Greg Kroah-Hartman , linux-kbuild@vger.kernel.org, Nick Desaulniers , linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Sami Tolvanen , linux-pci@vger.kernel.org, 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 LTO, LLVM bitcode won't be compiled into native code until modpost_link, or modfinal for modules. This change postpones calls to objtool until after these steps. Signed-off-by: Sami Tolvanen --- include/linux/compiler.h | 2 +- lib/Kconfig.debug | 2 +- scripts/Makefile.build | 2 ++ scripts/Makefile.modfinal | 15 +++++++++++++++ 4 files changed, 19 insertions(+), 2 deletions(-) diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 30827f82ad62..12b115152532 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -120,7 +120,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, /* Annotate a C jump table to allow objtool to follow the code flow */ #define __annotate_jump_table __section(.rodata..c_jump_table) -#ifdef CONFIG_DEBUG_ENTRY +#if defined(CONFIG_DEBUG_ENTRY) || defined(CONFIG_LTO_CLANG) /* Begin/end of an instrumentation safe region */ #define instrumentation_begin() ({ \ asm volatile("%c0:\n\t" \ diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 9ad9210d70a1..9fdba71c135a 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -399,7 +399,7 @@ config STACK_VALIDATION config VMLINUX_VALIDATION bool - depends on STACK_VALIDATION && DEBUG_ENTRY && !PARAVIRT + depends on STACK_VALIDATION && (DEBUG_ENTRY || LTO_CLANG) && !PARAVIRT default y config DEBUG_FORCE_WEAK_PER_CPU diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 64e99f4baa5b..82977350f5a6 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -226,6 +226,7 @@ endif # CC_USING_PATCHABLE_FUNCTION_ENTRY endif # CONFIG_FTRACE_MCOUNT_RECORD ifdef CONFIG_STACK_VALIDATION +ifndef CONFIG_LTO_CLANG ifneq ($(SKIP_STACK_VALIDATION),1) __objtool_obj := $(objtree)/tools/objtool/objtool @@ -258,6 +259,7 @@ objtool_obj = $(if $(patsubst y%,, \ $(__objtool_obj)) endif # SKIP_STACK_VALIDATION +endif # CONFIG_LTO_CLANG endif # CONFIG_STACK_VALIDATION # Rebuild all objects when objtool changes, or is enabled/disabled. diff --git a/scripts/Makefile.modfinal b/scripts/Makefile.modfinal index d168f0cfe67c..9f1df2f1fab5 100644 --- a/scripts/Makefile.modfinal +++ b/scripts/Makefile.modfinal @@ -48,6 +48,21 @@ endif # CC_USING_PATCHABLE_FUNCTION_ENTRY endif # CC_USING_RECORD_MCOUNT endif # CONFIG_FTRACE_MCOUNT_RECORD +ifdef CONFIG_STACK_VALIDATION +ifneq ($(SKIP_STACK_VALIDATION),1) +cmd_ld_ko_o += \ + $(objtree)/tools/objtool/objtool \ + $(if $(CONFIG_UNWINDER_ORC),orc generate,check) \ + --module \ + $(if $(CONFIG_FRAME_POINTER),,--no-fp) \ + $(if $(CONFIG_GCOV_KERNEL),--no-unreachable,) \ + $(if $(CONFIG_RETPOLINE),--retpoline,) \ + $(if $(CONFIG_X86_SMAP),--uaccess,) \ + $(@:.ko=$(prelink-ext).o); + +endif # SKIP_STACK_VALIDATION +endif # CONFIG_STACK_VALIDATION + endif # CONFIG_LTO_CLANG quiet_cmd_ld_ko_o = LD [M] $@ -- 2.27.0.212.ge8ba1cc988-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel