From patchwork Thu Jun 23 01:48:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Zhongjin X-Patchwork-Id: 12891693 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 19BADC43334 for ; Thu, 23 Jun 2022 02:10:44 +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=XEgHHfeFvvC6+r /j5ccEPZl3LrFp/sBd2JjoYWmz6Z643ggk8SlqBh/63DbYT0Xxr+pZXzsdPqRNyPrdwlGolTXYo1k lf2lInW2dSxPFSqEFTWFhfo9EJYS0Fg65KXUS003iqoansKmhYGK3co7WVaAQiYgPBpURIaBLjkC8 9IxJkOcNZ5I4GD4wWcgmiL8Dvps3lLKKtW6LBuMRQRTkE5M/5YJvvAbv9jINrNZwjCUnDU6gNwr3t brit/PUPiSMS9vl70HkXpkxJnx0/X0cHl/TPKTm0ADFmDGWC68wr6efvOS0SFuDMn4pX8CEQjeu0U pKsKpeE8EcPOyxViE8rw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o4CHl-00CsH1-Ut; Thu, 23 Jun 2022 02:09:35 +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-00ClXH-B2 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=OuRerDfWC5LPrDr7z5NyHBeKLSNLSDRr5twLKZDbWHs=; b=I3Eq75fFHVgAUWgZ5/afPqMAyS wAmPDCdAte3LXE49VsG06DtcBQ2ZGX++H3DQ+T/b3YrWz0Ki+XI/erQ7NqWHip7VJfnPpgrJF+62O Wb9eXKfIP0XzcqihHlPx7oF9VqhAkcd7sMW3AFYcvmabq45ZmUSxzjSGqnPt1T0AR7P1Py9vZfLTR M23Mre2XDBotM++6w0eRSWckqApDAnIXe9Yg5/dTePxYQXfGphaH7F6SVyGVln3EYqBGqbhAkMbqp WzPcO0JotRY6Fl34G5+6LGEV4bkZOvn72Qhv7N5oeThOtAvA/bg9TE/geZx64xGAfAT1TgvmdP4fK ylRNhfMA==; 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 1o4C0g-00BTYP-Tl for linux-arm-kernel@lists.infradead.org; Thu, 23 Jun 2022 01:52:48 +0000 Received: from dggpemm500022.china.huawei.com (unknown [172.30.72.57]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4LT38j0MrRz1KC2v; Thu, 23 Jun 2022 09:49:41 +0800 (CST) Received: from dggpemm500013.china.huawei.com (7.185.36.172) by dggpemm500022.china.huawei.com (7.185.36.162) 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 15/33] arm64: bug: Add reachable annotation to warning macros Date: Thu, 23 Jun 2022 09:48:59 +0800 Message-ID: <20220623014917.199563-16-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_322116_F907937C X-CRM114-Status: UNSURE ( 9.05 ) 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