From patchwork Mon Nov 7 10:47:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Luca Fancellu X-Patchwork-Id: 13034244 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 DDF25C43217 for ; Mon, 7 Nov 2022 10:48:05 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.439288.693358 (Exim 4.92) (envelope-from ) id 1orzfZ-0003DY-3h; Mon, 07 Nov 2022 10:47:57 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 439288.693358; Mon, 07 Nov 2022 10:47:57 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1orzfZ-0003Bx-0N; Mon, 07 Nov 2022 10:47:57 +0000 Received: by outflank-mailman (input) for mailman id 439288; Mon, 07 Nov 2022 10:47:55 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1orzfX-0002Pj-Dc for xen-devel@lists.xenproject.org; Mon, 07 Nov 2022 10:47:55 +0000 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by se1-gles-flk1.inumbo.com (Halon) with ESMTP id a1a1c49e-5e89-11ed-8fd1-01056ac49cbb; Mon, 07 Nov 2022 11:47:53 +0100 (CET) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1AAC3139F; Mon, 7 Nov 2022 02:48:00 -0800 (PST) Received: from e125770.cambridge.arm.com (e125770.cambridge.arm.com [10.1.195.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B9C0F3F73D; Mon, 7 Nov 2022 02:47:52 -0800 (PST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: a1a1c49e-5e89-11ed-8fd1-01056ac49cbb From: Luca Fancellu To: xen-devel@lists.xenproject.org Cc: bertrand.marquis@arm.com, wei.chen@arm.com, Andrew Cooper , George Dunlap , Jan Beulich , Julien Grall , Stefano Stabellini , Wei Liu Subject: [RFC PATCH 4/4] xen: Justify linker script defined symbols in include/xen/kernel.h Date: Mon, 7 Nov 2022 10:47:39 +0000 Message-Id: <20221107104739.10404-5-luca.fancellu@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20221107104739.10404-1-luca.fancellu@arm.com> References: <20221107104739.10404-1-luca.fancellu@arm.com> Eclair and Coverity found violation of the MISRA rule 8.6 for the symbols _start, _end, start, _stext, _etext, _srodata, _erodata, _sinittext, _einittext which are declared in xen/include/xen/kernel.h. All those symbols are defined by the liker script so we can deviate from the rule 8.6 for these cases. Signed-off-by: Luca Fancellu --- docs/misra/safe.json | 9 +++++++++ xen/include/xen/kernel.h | 4 ++++ 2 files changed, 13 insertions(+) diff --git a/docs/misra/safe.json b/docs/misra/safe.json index e079d3038120..e3c8a1d8eb36 100644 --- a/docs/misra/safe.json +++ b/docs/misra/safe.json @@ -3,6 +3,15 @@ "content": [ { "id": "SAF-0-safe", + "analyser": { + "eclair": "MC3R1.R8.6", + "coverity": "misra_c_2012_rule_8_6_violation" + }, + "name": "Rule 8.6: linker script defined symbols", + "text": "It is safe to declare this symbol because it is defined in the linker script." + }, + { + "id": "SAF-1-safe", "analyser": {}, "name": "Sentinel", "text": "Next ID to be used" diff --git a/xen/include/xen/kernel.h b/xen/include/xen/kernel.h index 8cd142032d3b..efcd24b355d6 100644 --- a/xen/include/xen/kernel.h +++ b/xen/include/xen/kernel.h @@ -65,24 +65,28 @@ 1; \ }) +/* SAF-0-safe R8.6 linker script defined symbols */ extern char _start[], _end[], start[]; #define is_kernel(p) ({ \ char *__p = (char *)(unsigned long)(p); \ (__p >= _start) && (__p < _end); \ }) +/* SAF-0-safe R8.6 linker script defined symbols */ extern char _stext[], _etext[]; #define is_kernel_text(p) ({ \ char *__p = (char *)(unsigned long)(p); \ (__p >= _stext) && (__p < _etext); \ }) +/* SAF-0-safe R8.6 linker script defined symbols */ extern const char _srodata[], _erodata[]; #define is_kernel_rodata(p) ({ \ const char *__p = (const char *)(unsigned long)(p); \ (__p >= _srodata) && (__p < _erodata); \ }) +/* SAF-0-safe R8.6 linker script defined symbols */ extern char _sinittext[], _einittext[]; #define is_kernel_inittext(p) ({ \ char *__p = (char *)(unsigned long)(p); \