From patchwork Thu Jun 23 01:48:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Zhongjin X-Patchwork-Id: 12891695 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 730BBC43334 for ; Thu, 23 Jun 2022 02:12:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Ej3Kniyg2xaoJdgsB+i6YefKPXqAl3gqPi2FrnD2RmQ=; b=Cd8cJcE1cqsEDa NbYaXGsMuf3v9FVMqovZthQbEHpuFvHlwGKYS8bPsYg9/WQbBVOzRQCVeuwsmjGXSq0pSYYjg73pq VxYjHz6+7K03jLb7f9CsKjgmz0h2L2SJ69mD7BqIA2feKqdzPZpuantQGqvDWYEbrqbvZ6CAPgOtX iiVSVfV2TlVDsfXV7FcqnN/HNFqdnqGISaTuIZCh6hP4Eocmajfgo+LwhwXbRLYRwepvHIKCyVw80 xK4JhrYn9b+eQ/gchumfzj/97R9Hx0spEGQvYa6BUDcQFG8yma0F96ZxEWnkiottSNKKSXeGFyYSv lmnSjCRFbGQhLY06+quQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4CJK-00CsxB-RM; Thu, 23 Jun 2022 02:11:11 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4C3T-00ClXF-B0 for linux-arm-kernel@bombadil.infradead.org; Thu, 23 Jun 2022 01:54:47 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: In-Reply-To:Message-ID:Date:Subject:CC:To:From:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=M3av26D8LaFmpSa01fLKSNv1JqhYin5f6lJWVoGbYkQ=; b=ZeGTDzGnPklRIftVRAdh6Sd4eo +x5/joTK9yRVyClQWUPV5yj/r+kI7+yBvxO4eG+jRlAqMrYJY0qW3TUTLT1V/DZIqEbj+c0I3+fpA 5AQzZAldzeIu47FdBmdDw5rNDI69py8ADHkLaR4F8fNShYR01MdXYiXgu7bofTB1dMxgn1KvSjiKj kRJGqEl2ZTM9FKsWFlwmcMlwQ//AfsM28nCfzN+14v6jI7/K6YhZIr/urqewt0deoUSKz3jcYsLoU BK95jU/HQMqgcbUhWwHteC21cel0oAL9ySjqfYYO4wehIiZgojvgfCjSQTRTL2BFisicP7KcCfvwV lYaKXgvA==; Received: from szxga01-in.huawei.com ([45.249.212.187]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4C0g-00BTYL-Ta for linux-arm-kernel@lists.infradead.org; Thu, 23 Jun 2022 01:52:53 +0000 Received: from dggpemm500024.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4LT38h05zRzhYg3; Thu, 23 Jun 2022 09:49:40 +0800 (CST) Received: from dggpemm500013.china.huawei.com (7.185.36.172) by dggpemm500024.china.huawei.com (7.185.36.203) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 23 Jun 2022 09:51:48 +0800 Received: from ubuntu1804.huawei.com (10.67.175.36) by dggpemm500013.china.huawei.com (7.185.36.172) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 23 Jun 2022 09:51:48 +0800 From: Chen Zhongjin To: , , , , , CC: , , , , , , , , , , , , , , Subject: [PATCH v6 12/33] objtool: arm64: Enable stack validation for arm64 Date: Thu, 23 Jun 2022 09:48:56 +0800 Message-ID: <20220623014917.199563-13-chenzhongjin@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220623014917.199563-1-chenzhongjin@huawei.com> References: <20220623014917.199563-1-chenzhongjin@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.175.36] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To dggpemm500013.china.huawei.com (7.185.36.172) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220623_025246_596882_A614C096 X-CRM114-Status: GOOD ( 10.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add build option to run stack validation at compile time. When requiring stack validation, jump tables are disabled as it simplifies objtool analysis (without having to introduce unreliable artifacs). In local testing, this does not appear to significaly affect final binary size nor system performance. Signed-off-by: Raphael Gault Signed-off-by: Julien Thierry Signed-off-by: Chen Zhongjin --- arch/arm64/Kconfig | 2 ++ arch/arm64/Kconfig.debug | 21 +++++++++++++++++++++ arch/arm64/Makefile | 4 ++++ 3 files changed, 27 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 57c4c995965f..30d3d549160f 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -201,6 +201,8 @@ config ARM64 select MMU_GATHER_RCU_TABLE_FREE select HAVE_RSEQ select HAVE_STACKPROTECTOR + select HAVE_OBJTOOL + select HAVE_STACK_VALIDATION select HAVE_SYSCALL_TRACEPOINTS select HAVE_KPROBES select HAVE_KRETPROBES diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug index 265c4461031f..c2c68c6f7557 100644 --- a/arch/arm64/Kconfig.debug +++ b/arch/arm64/Kconfig.debug @@ -20,4 +20,25 @@ config ARM64_RELOC_TEST depends on m tristate "Relocation testing module" +choice + prompt "Choose kernel unwinder" + default UNWINDER_FRAME_POINTER + help + This determines which method will be used for unwinding kernel stack + traces for panics, oopses, bugs, warnings, perf, /proc//stack, + livepatch, lockdep, and more. + +config UNWINDER_FRAME_POINTER + bool "Frame pointer unwinder" + select FRAME_POINTER + help + This option enables the frame pointer unwinder for unwinding kernel + stack traces. + + The unwinder itself is fast and it uses less RAM than the ORC + unwinder, but the kernel text size will grow by ~3% and the kernel's + overall performance will degrade by roughly 5-10%. + +endchoice + source "drivers/hwtracing/coresight/Kconfig" diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 2f1de88651e6..ad2f4a5e8f6c 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -133,6 +133,10 @@ ifeq ($(CONFIG_DYNAMIC_FTRACE_WITH_REGS),y) CC_FLAGS_FTRACE := -fpatchable-function-entry=2 endif +ifeq ($(CONFIG_STACK_VALIDATION),y) +KBUILD_CFLAGS += -fno-jump-tables +endif + # Default value head-y := arch/arm64/kernel/head.o