From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 729F5C25B48 for ; Fri, 27 Oct 2023 17:19:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232545AbjJ0RTw (ORCPT ); Fri, 27 Oct 2023 13:19:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232491AbjJ0RTv (ORCPT ); Fri, 27 Oct 2023 13:19:51 -0400 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45EBEAB; Fri, 27 Oct 2023 10:19:49 -0700 (PDT) Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39RDVJCs006061; Fri, 27 Oct 2023 17:19:11 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-2023-03-30; bh=UniXMJ7/vZrJQC45hq6KABWHBfI/8BFdDhvOt+yA1jc=; b=kOpc6fm8rPRZma77SpMyfDP4Y+/RGGZq3W398JD4x/H/kZAq5O5wKToRXI+639T9OdbF EgRT/g7YDe92R39JhNsUhmdZJ9VuKb5x5hfCjQ8/uR3uj0TNAE/XQt7AXi505Es/b89F eQXQNansuksHZYk5NtdxbyD7aumatGb7ANfSEewqy2Utbjap7iKHusQhEkS48z0O6+4f y+IgiY7OTAyEIiUKSslDpgTWy0J+5SexAQqkea6jofzrbQ2L9WxjRRXEy3xCK+8bfi/N sINvD/ao9BpIX17SpUNghrWj14HlN4zmV+PS3aAbGaZbPBndSuCvA7MUnzi1ioTbIMcF +w== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3tyx219yc2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 27 Oct 2023 17:19:10 +0000 Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 39RFOeCA025767; Fri, 27 Oct 2023 17:19:10 GMT Received: from nam11-co1-obe.outbound.protection.outlook.com (mail-co1nam11lp2169.outbound.protection.outlook.com [104.47.56.169]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3tywqmgs5e-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 27 Oct 2023 17:19:09 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=oBAWXbRrX4H8D3CCFMqxQg5dUQtBNgs1NCA9qgFIq3+wZqmpzqiExmE17aMpiyXEHeioY8ZWFJmVszPm3T7fMDStjfYcEmB6JR7vjRD+SK293XHYR11GA/ae7gLezQYhMZi5bx4RzwKD0YunNzKJeHX1ID7yEPrwI36nsItw9VE7kxhw0CbeZAw1G7/1+Azul6PJ8F2CXLGBpo+5lyAo1KBdlPjUfoG+2EcbmRsY6vVHFqZt7d5hxQDGj8iKdaNZsmIniAyVxiQWmuKS2QQ9yg06J+SPykGZhUYYo6H6xmUP1EVeXZnBLxXMdUUn10sb55s/CEQNuZZdKA7cx9Kkig== 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=UniXMJ7/vZrJQC45hq6KABWHBfI/8BFdDhvOt+yA1jc=; b=LG6/atNGJFdqPPZmupAFbfTXbt2YIfsxZwkd0JPfW3D8QrKg2OirTbYOuKUvdM1OcQdcRB6iW8LI2cSqU7vAVDx/VwW8jI6BAFqBbrc7F4p33JuWOLdYy6tIcYvcAKgy1+tynyql2tAfPqdRELHnK6Xs8h/S5AAeJgFkm/eupKGvcRZIhOiTZTfyQPEga6bBApswh9NTHZ/DSL/69fQFTJ1yj8EfaK0D6+ov/TNBE8pLlRbNnWDYqtL4VwVF7kSqPaB6Zm1I8MwYpyos0v94xzQd6JwPf8DJrLSVCfPYCA7cGKU9HBlViUkVeqOza2nHLPFga7F5xX35YZJoJULkoA== 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=UniXMJ7/vZrJQC45hq6KABWHBfI/8BFdDhvOt+yA1jc=; b=DCIZyjzucImN4kDj/tDSqr7yBzbedZKGR6uoerI4SJFOPdulqZtER/R7UNEPcfLosfN/NVYJAJxsWxWIJT48xJ+C+Ng95K7fODECRyU8apmRN2vTYat1U44dtvdTWUpFuw2r6wtWUNbqoK2cGz8JNsoSadv/EtXl7xRxwqHsiUo= Received: from PH8PR10MB6597.namprd10.prod.outlook.com (2603:10b6:510:226::20) by CYXPR10MB7951.namprd10.prod.outlook.com (2603:10b6:930:dc::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6933.22; Fri, 27 Oct 2023 17:17:58 +0000 Received: from PH8PR10MB6597.namprd10.prod.outlook.com ([fe80::6d2c:be3a:dbc5:6f9e]) by PH8PR10MB6597.namprd10.prod.outlook.com ([fe80::6d2c:be3a:dbc5:6f9e%4]) with mapi id 15.20.6933.019; Fri, 27 Oct 2023 17:17:58 +0000 From: Stephen Brennan To: Arnd Bergmann Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-debuggers@vger.kernel.org, Mike Christie , Geert Uytterhoeven , "Christian Brauner (Microsoft)" , Petr Mladek , Marco Elver , Randy Dunlap , Douglas Anderson , Maninder Singh , Luis Chamberlain , Nick Desaulniers , Zhen Lei , Kees Cook , Zhaoyang Huang , Stephen Brennan , Andrew Morton , Sami Tolvanen Subject: [PATCH v3 0/1] Introduce CONFIG_DEBUG_INFO_IKCONFIG Date: Fri, 27 Oct 2023 10:17:55 -0700 Message-Id: <20231027171756.1241002-1-stephen.s.brennan@oracle.com> X-Mailer: git-send-email 2.39.3 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: BYAPR11CA0100.namprd11.prod.outlook.com (2603:10b6:a03:f4::41) To PH8PR10MB6597.namprd10.prod.outlook.com (2603:10b6:510:226::20) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH8PR10MB6597:EE_|CYXPR10MB7951:EE_ X-MS-Office365-Filtering-Correlation-Id: 0dea2e59-6a2f-4f4d-3fb9-08dbd710aa5a 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:PH8PR10MB6597.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(376002)(136003)(366004)(39860400002)(396003)(346002)(230922051799003)(451199024)(64100799003)(1800799009)(186009)(6512007)(6506007)(6666004)(6486002)(1076003)(2616005)(478600001)(6916009)(966005)(316002)(66556008)(54906003)(66476007)(66946007)(38100700002)(83380400001)(103116003)(7416002)(2906002)(8676002)(86362001)(4326008)(8936002)(5660300002)(36756003)(41300700001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?uBmllXcC47jDd+3IRjN5/KIyLoohTMPJCaAIDAr1YSRgpMVQPRpPkOH8VT8U?= =?us-ascii?Q?jXsyvMvFbYMJKaBtT2qNGnAv73siLZwfPuCvCi7yusAOtH3CJ4Vrob+2Cmx9?= =?us-ascii?Q?sykgyOAnqfLjcqAqPEMDP4pHYw5XAhuKQfdKef1ALE0lPDrh7oQYX3uaVZat?= =?us-ascii?Q?6oRX+ApadtbuU3hQPbKnTjze8tdM/ttwXKd3Xu5GNhEamFk6QhoGoTvJTQxr?= =?us-ascii?Q?saD8iteDUKHbw3ypygMLXMtQl/rZ8jwEqYpcwFyUBu7vJ98HUmWCrzIJVHZF?= =?us-ascii?Q?gHLDILvRBoa/M6zBbI8gdCFHJxN+yDcStOIyN63FpvHzheXp0mXuGaiIUA06?= =?us-ascii?Q?pBZN1I+diX95BbvpVuXsBoQljIJS59UvfzHjwZUIQUB9MG4iDpBhi197PA+h?= =?us-ascii?Q?2585iaziW8FFwixjPCthhBOAVi1Gloh1sctDngs7a30Gvp7B5EaC09+/LHpL?= =?us-ascii?Q?d/xImbO3a00UHkN+KElZ0+FcgRaWf6DSJ2MRSwffQ8yXLj0qoKHDJ6uTpAIu?= =?us-ascii?Q?y45hifgHRIvWihRGT1sVEfquS64Mmo7jMTYGs45aEPmTyk8MJfWuXjPRfFVM?= =?us-ascii?Q?oUP4p57kRE2sf0NwrHTMRV71V8gDK9U7NT0r4KV8EaykZwZgwjQ+WQOBmjsc?= =?us-ascii?Q?kiTOBkXF3DGP3B6K3zSEBSsYtjttQlVwcRzv/jyI0Xrm1GEmB7w+CZruqZp3?= =?us-ascii?Q?LxnE8hNUZ7A60rPJYmbP0Gdfs1Pb9FE3BVxS7J5vcaq92v00C5Eit9K2+x3y?= =?us-ascii?Q?iHZE6pMOuQ3haJxg/gWw1GRLjqstgCHSS8rqOZwnH32k12YlpLw5c8F0r5BU?= =?us-ascii?Q?bQg6sTg+fu0gC9G+vGbC9NRNvBY9QQz06VbI2HC37GLRyn3ZIyq17J5uQQz8?= =?us-ascii?Q?RxB3oBVj0ttu7hsHR+X97JudGwj9EDZqTXFEuFuqXQ/iOCc48nG+Q+4McHkR?= =?us-ascii?Q?BfRPCTBDSr1K076wkj8AR7oYti92vJqr43/v5APH6KRVzkHqklJXgIHOedgs?= =?us-ascii?Q?XhqOJ7Ouy1x0jZeH+JXYxe4S2N7G4cfFkLV0AcksuLDUGDvbYXn8arV35456?= =?us-ascii?Q?YbOdhJMGN5rjVFzaGJktGFMNyNGikWZR3RqA0SO3irITDdQa+9Qerrh22Koj?= =?us-ascii?Q?Az0/E2PAm7Iu6Y32cNCabE2Jzz15fKlpyowe7QhlATLt+N9b3hrlWkjOhfgc?= =?us-ascii?Q?4zwLq7UPJ13vWltK1XPfWLA5DHxdbZ3gj6snJC4t4tBX0IsXJEk4CTKSFC4t?= =?us-ascii?Q?QNdEKP/QrnXH/kxuL1HXVrzNN2sRcio447iOkNoZcoVoxgrW4RNCAJd5Ll97?= =?us-ascii?Q?KTb1Dk0EOg8arNux2gtVhVEVKuSRacT2u6eS8z9vIWH54Wgemejp4M+B0v79?= =?us-ascii?Q?TUCdXLPvse2CJuSn1YiBI8BWPlgX3E7EpHuIbe5vV4jTgLaqGZylKj9IRz3w?= =?us-ascii?Q?Mxl62ITiRTyLnIGe82s62jNdpp6lXUn+Ud9Z8F/K2EYWtcWxE/WG2XCbvXo3?= =?us-ascii?Q?hRP8U5Bzx2et1+pmElrcyayi5W/hHR1wGRy3TTymlP8TljQcdSHZfGwmp6bS?= =?us-ascii?Q?es0clVOT1Dpb/tAcxbpl3knNQEA8oW2FQdDd1XoUfN5PVGIA2VeT/g9xQ+vr?= =?us-ascii?Q?2DQPYIaax9G9zPH3ULtACTgHxWWo4YRqMXujAE8ZTRHhVLHRxsViUiP6BbFo?= =?us-ascii?Q?3pfBIg=3D=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: =?us-ascii?Q?/jW6kJLcQ5CGQdXGr8G8/QHLvaJdXqXKOb8vxcFmfzQ2LWvesJmCnUGDcD1/?= =?us-ascii?Q?7tggC4/8RVrU+LLeWoPfJnLvVmBKpF2RY325ou1ZAl1qJwXuGhO1QprUo0tJ?= =?us-ascii?Q?O2yeagisLeUwqfiNliqGBBPLKatcKiWZOJJqrXaXaINAtaX2/nvBwFCY3w3+?= =?us-ascii?Q?6poEPArE2hjv/iZQXA3D07ArbvcTWEjwCrURc43Z+udlpPY4WuwVGpNb3eQG?= =?us-ascii?Q?b4pDGt94AU55UOIMb3UjQegUoaQW3z/gGDj2ZSjVq/zkUN4WehHKvGDQww/L?= =?us-ascii?Q?FmN+kYpCkRkZjGKRhEfZuPTyhF1ebfikb2Fil5p1cHxt6ERNDvBIyvkBVssN?= =?us-ascii?Q?BkbpW1aAqDl7JjNig0EeUDBv+59TZSKLdlxRPeYGhSe4ANbRVzNg35gTLd5I?= =?us-ascii?Q?GtVt+iK/1vEnAafvFrzaRgzV1Gcmh8MqAHDNJj3b7O3sjb8MHz4+9EsVQnGL?= =?us-ascii?Q?MccCMWRZmWl441JDPAhRy3V2ZCGU/icfmXy/bc9I7Djjs4wLNCVDkX/X8ybf?= =?us-ascii?Q?xZPn1dd9s2WOca7dGpGMbkaKJIlTo7gaInAX+BqC6v5QEVs5UHEbDHE0jugF?= =?us-ascii?Q?MvpOCvyAG51gezvleFvw28q+Wi9uijzrReviG3yL+KyPbGBO5yEjYoWl975L?= =?us-ascii?Q?EUAzIq0p7rpr1OLyd/cLe5wLr2xL3UOA8iDTsdhvtYQ224eIiSXnc3mM25VJ?= =?us-ascii?Q?BJDRYtosmV0MSz34y3Um4XIoCTuzdgXlV4QY/AznxIHwtYncFPhn+5+NcI38?= =?us-ascii?Q?IPhb5zhmRSj38FyjIG0qBw245NE59NJEqOXlfaqZlgH8eZ2us/+xBRFkUHqh?= =?us-ascii?Q?mPRunQrStKmwJSArmkAUqQ+8JmWd7cpo2IWrCnCYKnZdawQrxEvhiFDoGw83?= =?us-ascii?Q?/SDFynZfcFJdmnlTCxdE8iYgzpnYbhQdF+tP6muoq58AdtNxiKAg7tBW/lq9?= =?us-ascii?Q?iFx0LwLP7sZIz6l5NRwntwWzfsY0+V4OgI7N97K/7NAYwIqFXyyTDPDiXWaT?= =?us-ascii?Q?ETD/MgLZv83OomeJSbfZBA7nYfok5AKA+BIE56jxG01/ZHqRYJD2v/zwOyfE?= =?us-ascii?Q?PMFdR8UsjkhdqG+IyraNtymZ8xAvV0bcezNjRXAKWbwBaq28TGY=3D?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0dea2e59-6a2f-4f4d-3fb9-08dbd710aa5a X-MS-Exchange-CrossTenant-AuthSource: PH8PR10MB6597.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Oct 2023 17:17:58.1713 (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: DxKNAWJISpaP8rjEvnM0ENk4aYViXewAsacmpCntFHVEF38Sa7JPdfHRMGNfB4iO6UJfFRJGXQ+pF7DzI5Ev7ek7lDsrnzfX7NL9XR+twRY= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CYXPR10MB7951 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-27_16,2023-10-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 mlxscore=0 spamscore=0 malwarescore=0 phishscore=0 bulkscore=0 suspectscore=0 mlxlogscore=836 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310240000 definitions=main-2310270150 X-Proofpoint-ORIG-GUID: KcJXjxt1l31QfB2BMP5TxQN92T_7qLuh X-Proofpoint-GUID: KcJXjxt1l31QfB2BMP5TxQN92T_7qLuh Precedence: bulk List-ID: X-Mailing-List: linux-debuggers@vger.kernel.org Hello All, This adds an alternative for CONFIG_IKCONFIG, which nearly all Linux distributions disable (probably due to memory considerations). It adds the section ".debug_linux_ikconfig" to the vmlinux ELF file, which is stripped out for final images, but retained for debuginfo (objcopy detects the ".debug" prefix). It is enabled by default whenever IKCONFIG is disabled, so that debuggers can rely on having the kernel config available. v1: https://lore.kernel.org/linux-debuggers/20231004165804.659482-1-stephen.s.brennan@oracle.com/T/#t v2: https://lore.kernel.org/linux-debuggers/20231025223640.1132047-1-stephen.s.brennan@oracle.com/T/#t Changes v2-v3: * Added missing dependency on kernel/config_data.gz in kernel/Makefile. Changes v1-v2: * I added "default y if IKCONFIG!=y". The result is that whenever DEBUG_INFO=y is enabled, and IKCONFIG is not built-in, then DEBUG_INFO_IKCONFIG will get enabled automatically. The whole point of this patch is for kernel debuggers to be able to rely on having kernel configuration information. The IKCONFIG data is quite small compared to kernel debuginfo, and it doesn't change anything at runtime. It's safe to enable this automatically, and it's important so that distributions (who create debuginfo explicitly to allow kernel debugging) will automatically begin creating this info for debuggers. * Randy Dunlap did review this, but I didn't apply that tag with the update, since I understand changing defaults is a major update, and it's a small patch to begin with, so I didn't want to misrepresent the review. Stephen Brennan (1): kernel/config: Introduce CONFIG_DEBUG_INFO_IKCONFIG include/asm-generic/vmlinux.lds.h | 3 ++- kernel/Makefile | 2 ++ kernel/configs-debug.S | 18 ++++++++++++++++++ lib/Kconfig.debug | 15 +++++++++++++++ 4 files changed, 37 insertions(+), 1 deletion(-) create mode 100644 kernel/configs-debug.S -- 2.39.3