From patchwork Fri Dec 8 05:07:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kris Van Hees X-Patchwork-Id: 13484807 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="eN+2LlVV"; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b="LWcTybzI" Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B03B635B8; Thu, 7 Dec 2023 21:08:54 -0800 (PST) Received: from pps.filterd (m0333521.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3B84VaY8028528; Fri, 8 Dec 2023 05:08:48 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : content-transfer-encoding : content-type : mime-version; s=corp-2023-11-20; bh=geVyhC03/DpDLGBbY9q2vya75Wtjximv6mPhK9yDd+k=; b=eN+2LlVVTBfeyDrO1jaCB5A8Fnozxg0xglILgBeMR6eZBQedL9I2Hrud1imLu3J3+yGU yZjBW919iW2JAZEShxHjcAZ/Z5stKFehhKZzKPRsPL8RUhx6Rn65E5fkliHyYH2va9TU iLgTHuKiDAuTecNboYdIXv4uJttSLL5SQGkiVaU/mBK6PyG/2fCXsECcbbpIdnjDGV/5 R3eUcTAS0ogAR8d20XYkEkaU0xSsTqBEYxSwaJEtpJF9yNyWCfOvlAmzmeZaH0BV0PGI iNh1Mz52crTevTLp2OhLTXAI8ZGM5ejphBdzx9HdpNSVz4Jq0Hec3ojKVwx09moTs9k5 QA== Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.appoci.oracle.com [130.35.100.223]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3utd0hn80b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 08 Dec 2023 05:08:47 +0000 Received: from pps.filterd (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 3B84VOak040264; Fri, 8 Dec 2023 05:08:46 GMT Received: from nam10-dm6-obe.outbound.protection.outlook.com (mail-dm6nam10lp2101.outbound.protection.outlook.com [104.47.58.101]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3utanef1b5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 08 Dec 2023 05:08:46 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=J7PzxNJYp0K3Ot8+1QkLYR7P6C4Dnb7IkiMzq3xu5xQ9awRtgU7KuKRkBwDw179qeTQOFwEGc3eJB12TIi3bsGTU+/Vinu9O5c78P9AMj3Cds77Jy7hR43D/fQHzEezIKrgU5VXPvcz0kY0TcpuVuzn5Idtwh5v2NlNpqEdV9EJ8Zhd7W+fc12SAD0y8Evg7QyHzx2T2qevCypHo4icfdiir47KkjU2jJ6p8U/dEkMqDlJ++SUGJSaEM8YIMF5HeT4vQYkYOLp29IBSlxxky24tK5xX1Sf3PhJxsnCb4NHEGBxJLm7tyKrhVKyaW1vw05jE+hGaPbsGlTA60RpN1ug== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=geVyhC03/DpDLGBbY9q2vya75Wtjximv6mPhK9yDd+k=; b=LlD03HKd8W+FZdGQMSXExNXqSgZ45vs9vMhzdT8r8IawE3DgRkwXw6VlxWtiUZoeIWR7nb3pNQ8KHacDoOOBEEuKd4Hdx+ipV5t6JGVZn+I5bb5Z17ZQiLA8qbxH3n3hrwlArrn0rkGNN/f++1oVX9tYu1xi9C43B7EXmliOATrawUi2h3YskRIt6IfhsCvW0E1n50zAN+1f2cBPiG6R3veYDPjtt91Nfs93i2mkAjWGRpLiQVGVmyDRWXe4I2IpQ3nhJHb53neIgdCUjnzZTfXE/vJ8bptOxD551aH+BTH461eB4R5eOWrVYmg9mumDJwcpFF8Uiin5VmzFEEjX6Q== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=geVyhC03/DpDLGBbY9q2vya75Wtjximv6mPhK9yDd+k=; b=LWcTybzI21DCTROJ3v/vINJWje2/pGaBxMcRQlK7tZ+Ke4NrBbKsmVccI/gZmWQFc4g3Te1/UeFshbnSnk5JS8EJnXGo9d/nYRPGr/KDFp4cltkLRhOTd/nsBpr6u0VbqU0el8Y3CPmIFgYvbSdGtDDQijyzmbvpcdgxmq3I3FA= Received: from SN6PR10MB2975.namprd10.prod.outlook.com (2603:10b6:805:d2::10) by BLAPR10MB5316.namprd10.prod.outlook.com (2603:10b6:208:326::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7068.28; Fri, 8 Dec 2023 05:08:44 +0000 Received: from SN6PR10MB2975.namprd10.prod.outlook.com ([fe80::de47:3c1f:a55b:58d0]) by SN6PR10MB2975.namprd10.prod.outlook.com ([fe80::de47:3c1f:a55b:58d0%7]) with mapi id 15.20.7068.028; Fri, 8 Dec 2023 05:08:42 +0000 From: Kris Van Hees To: linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-modules@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: Kris Van Hees , Steven Rostedt , Luis Chamberlain , Masami Hiramatsu , Nick Desaulniers , Jiri Olsa Subject: [PATCH 0/6] Generate address range data for built-in modules Date: Fri, 8 Dec 2023 00:07:46 -0500 Message-ID: <20231208050752.2787575-1-kris.van.hees@oracle.com> X-Mailer: git-send-email 2.42.0 X-ClientProxiedBy: MN2PR01CA0022.prod.exchangelabs.com (2603:10b6:208:10c::35) To SN6PR10MB2975.namprd10.prod.outlook.com (2603:10b6:805:d2::10) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN6PR10MB2975:EE_|BLAPR10MB5316:EE_ X-MS-Office365-Filtering-Correlation-Id: 89b2650c-6b3e-4383-8820-08dbf7abbf7e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN6PR10MB2975.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(396003)(376002)(39860400002)(136003)(346002)(366004)(230922051799003)(451199024)(186009)(1800799012)(64100799003)(6486002)(478600001)(66556008)(66476007)(54906003)(66946007)(38100700002)(6512007)(83380400001)(26005)(316002)(6506007)(2616005)(1076003)(2906002)(8936002)(8676002)(86362001)(4326008)(5660300002)(103116003)(36756003)(41300700001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 89b2650c-6b3e-4383-8820-08dbf7abbf7e X-MS-Exchange-CrossTenant-AuthSource: SN6PR10MB2975.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Dec 2023 05:08:42.9272 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 4LcUXwPOPqMbzt3qRB/qwkivQeef1bw4dQQo3lp3dvlj1EIeMdx5LKXph0MoW+G2Ej0ej4U5tpMInx2m0C0AdvnDKnzjNqbc1jdNwWFphr4= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BLAPR10MB5316 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-08_02,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 spamscore=0 malwarescore=0 bulkscore=0 mlxlogscore=922 phishscore=0 suspectscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312080038 X-Proofpoint-GUID: ABPTVkFxa8-E2wDpfKxwS0WD9mitLVNZ X-Proofpoint-ORIG-GUID: ABPTVkFxa8-E2wDpfKxwS0WD9mitLVNZ Especially for tracing applications, it is convenient to be able to refer to a symbol using a pair and to be able to translate an address into a pair. But that does not work if the module is built into the kernel because the object files that comprise the built-in module implementation are simply linked into the kernel image along with all other kernel object files. This is especially visible when providing tracing scripts for support purposes, where the developer of the script targets a particular kernel version, but does not have control over whether the target system has a particular module as loadable module or built-in module. When tracing symbols within a module, referring them by pairs is both convenient and aids symbol lookup. But that naming will not work if the module name information is lost if the module is built into the kernel on the target system. Earlier work addressing this loss of information for built-in modules involved adding module name information to the kallsyms data, but that required more invasive code in the kernel proper. This work never did get merged into the kernel tree. All that is really needed is knowing whether a given address belongs to a particular module (or multiple modules if they share an object file). Or in other words, whether that address falls within an address range that is associated with one or more modules. This patch series is baaed on Luis Chamberlain's patch to generate modules.builtin.objs, associating built-in modules with their object files. Using this data, vmlinux.o.map and vmlinux.map can be parsed in a single pass to generate a modules.buitin.ranges file with offset range information (relative to the base address of the associated section) for built-in modules. The file gets installed along with the other modules.builtin.* files. The impact on the kernel build is minimal because everything is done using a single-pass AWK script. The generated data size is minimal as well, (depending on the exact kernel configuration) in the range of 500-600 lines, with a file size of 20-30KB. Kris Van Hees (5): module: add CONFIG_BUILTIN_RANGES option kbuild: generate a linker map for vmlinux.o module: script to generate offset ranges for builtin modules kbuild: generate modules.builtin.ranges when linking the kernel module: add install target for modules.builtin.ranges Luis Chamberlain (1): kbuild: add modules.builtin.objs .gitignore | 2 +- Documentation/dontdiff | 2 +- Documentation/kbuild/kbuild.rst | 5 + Makefile | 8 +- include/linux/module.h | 4 +- kernel/module/Kconfig | 14 +++ scripts/Makefile.lib | 5 +- scripts/Makefile.modinst | 11 +- scripts/Makefile.vmlinux | 17 ++++ scripts/Makefile.vmlinux_o | 18 +++- scripts/generate_builtin_ranges.awk | 149 ++++++++++++++++++++++++++++ 11 files changed, 225 insertions(+), 10 deletions(-) create mode 100755 scripts/generate_builtin_ranges.awk base-commit: 8f34f6b7b6b3260eb6312a19ececcc97908d15b7