From patchwork Wed Jun 22 15:49:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Zhongjin X-Patchwork-Id: 12891109 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 A9324C433EF for ; Wed, 22 Jun 2022 16:10:06 +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=SCRFEooPiu1sv6Q7jKOrMfIyBRKM+bbv2n6ut72p4+g=; b=lo9cHPCf4tKN0f KgNyaTGYVp7+0WzjjgbFpfbPivOLy5JYIroRXlms7AA78/DX2/wr4L0liH1rAynayHR2K8Mi65lrY UDQobRJSmK5/CJ7R7r0nEcyzYoZ4QJpyPo8FLmQzcvF2XDLlHDqIOHn/HFNYlgKTDzBCmmb9JVL+B p63059vnGOpM9ab6lH+XD9YxL5aX0gf5qnGtG4CjQLczuPcOCYdXaVhaRq9ldG/sRDQaumMm+Z5Z1 P7Hl7OCHq3VUDtDV/vzFOzodJ/qQHxbd2i3imssWSxCAKRp7uVpursES9GsalSSo1qkjNtlHfdACo /h1ihRDmrRDRK9Fa950w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o42uU-00BODQ-Aa; Wed, 22 Jun 2022 16:08:54 +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 1o42fU-00BHyh-BJ for linux-arm-kernel@bombadil.infradead.org; Wed, 22 Jun 2022 15:53:24 +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=OuRerDfWC5LPrDr7z5NyHBeKLSNLSDRr5twLKZDbWHs=; b=nadMe7Fwr/hBtgKSXC1X9xeU7x BijNQr5I77orCCw3dldBOf2tQBXyK6BKOu4PRJ28wJxDhT52EVVIFMhxEUU5kiLJ3SZL6SIZ06rf4 iI8HLl91DksBQLJc6c4ncv29ESQztOycdbiTZ/F+Vg5a7VqB4oAHu8ARJhAgCZA+Ox0m6isxNxx7c /uO5l2kAlCLYikMbPMNAiCbnOq44OL1oIRkPl15iXL0Wavn3MyOX8C/YBhPT9t1Btldjj6CXc7SAc UD/MMFSmdcdUvMBNkZUHG/JMazuRgD1fnVrmPYy/wjTR19jQYtGH6Jxr1/O11/qOQYUXGEynLsZ7R kgFMYbLw==; Received: from szxga08-in.huawei.com ([45.249.212.255]) by desiato.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o42ev-00B8he-HK for linux-arm-kernel@lists.infradead.org; Wed, 22 Jun 2022 15:53:21 +0000 Received: from dggpemm500020.china.huawei.com (unknown [172.30.72.56]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4LSnsT3M3Fz1KC4b; Wed, 22 Jun 2022 23:50:37 +0800 (CST) Received: from dggpemm500013.china.huawei.com (7.185.36.172) by dggpemm500020.china.huawei.com (7.185.36.49) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 22 Jun 2022 23:52:44 +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; Wed, 22 Jun 2022 23:52:44 +0800 From: Chen Zhongjin To: , , , , , CC: , , , , , , , , , , , , , Subject: [PATCH v5 15/33] arm64: bug: Add reachable annotation to warning macros Date: Wed, 22 Jun 2022 23:49:02 +0800 Message-ID: <20220622154920.95075-16-chenzhongjin@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220622154920.95075-1-chenzhongjin@huawei.com> References: <20220622154920.95075-1-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-20220622_165318_192878_5C3FDABA X-CRM114-Status: UNSURE ( 9.26 ) X-CRM114-Notice: Please train this message. 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 WARN* and BUG* both use brk #0x800 opcodes and the distinction is provided by the contents of the bug table. This table is not accessible to objtool, so add an annotation to WARN* macros to let objtool know that brk handler will return an resume the execution of the instructions following the WARN's brk. Signed-off-by: Julien Thierry Signed-off-by: Chen Zhongjin --- arch/arm64/include/asm/bug.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/bug.h b/arch/arm64/include/asm/bug.h index 28be048db3f6..9917429971d4 100644 --- a/arch/arm64/include/asm/bug.h +++ b/arch/arm64/include/asm/bug.h @@ -19,7 +19,11 @@ unreachable(); \ } while (0) -#define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags)) +#define __WARN_FLAGS(flags) \ +do { \ + __BUG_FLAGS(BUGFLAG_WARNING|(flags)); \ + annotate_reachable(); \ +} while (0) #define HAVE_ARCH_BUG