From patchwork Thu Aug 15 15:03:38 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kris Van Hees X-Patchwork-Id: 13764893 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CF9A21AD9D9; Thu, 15 Aug 2024 15:04:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=205.220.177.32 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723734270; cv=fail; b=T1E/5TUJb32b61MHK+3sn64t7dQKp8ouqvpNtv1xTN5W6NAmBZ4fRm0zTeL1o6RHJeivKgBmsjbyKwbtrNdTutl6aQWiJlnl2hmEq76iWkCfCfTi8InonfAn26q/jRnG39oSBMg/xp7D9jBLblzp4AwHw00bzMTDtnazGg1+4CY= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723734270; c=relaxed/simple; bh=ftSiw6pJwtJSBUEnrSMTon6hGKj2JCRrSdZcHLKbfjs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=OByWY64uiOPR3v0xurndhKd0A2bmH1IR46wA9g9hGgqk4o6Mmyf22B73T7pG2wb7vARYfX38KMe4y2Hf9Wza1hfkpEr44q2plouMrM8N7aF/wAmcVN7iuEFEE3Dle7AZWjneYQ7lrIbkdWVaSnVvRFdGKoSyTQ04UYDO9i/KfTk= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com; spf=pass smtp.mailfrom=oracle.com; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b=FV+sEew1; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b=gl6WvI5l; arc=fail smtp.client-ip=205.220.177.32 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oracle.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oracle.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="FV+sEew1"; dkim=pass (1024-bit key) header.d=oracle.onmicrosoft.com header.i=@oracle.onmicrosoft.com header.b="gl6WvI5l" Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 47FEtXJt016195; Thu, 15 Aug 2024 15:04:15 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :content-transfer-encoding:content-type:mime-version; s= corp-2023-11-20; bh=PxilyXXdM6Ve7rkFM6qZeXu7Rm7nXpj1Ft7ycoSTWvY=; b= FV+sEew1wfYaR7KC97KQ8iOG9LBQB0qxTefKNpDi4VtZzXbxuXeMqIV6l/rPPPR0 oNLlC0jOuKbSVCEAG8vx7P9fpVCyT5nI8etdTQlKBJdqdQI9nfPI8o2MfgzxFjNt 0oxz2bY/tofGvo5ckebWLoGSqZfCg0qEL5Al6nvy+NEcBUvxhMWKKump7ZnJsLWW 8MdzOIlT0wk71uljtdISm0uqRZqpI+4Prkbbn7LBRUIAPJ6EwfaJ5gaFifawiqGf CQdlI3QlbUH75UqpMfsNTgtlnBPEyl/wkoDRwTSgLOD4SfV5bKKBwZKYiO97udt3 qnxc1S2HsI1riMHn+xPPMg== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 40wxmd2huv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 15 Aug 2024 15:04:14 +0000 (GMT) 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 47FDbUPO021064; Thu, 15 Aug 2024 15:04:13 GMT Received: from nam12-mw2-obe.outbound.protection.outlook.com (mail-mw2nam12lp2049.outbound.protection.outlook.com [104.47.66.49]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 40wxnhqu05-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 15 Aug 2024 15:04:13 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=tC1yvZOaB1pMmWcpXZU8O5B0Rs7vFZLFxythR7vv+wl9NLhGLW7l1stp/iZ1PbkQpOVy0pFrPe6nvBGcAWRhlUVNJ2DnjNrYPgRVJlWt0UxRDc3EWvrc9p6mudFAhs8laQwW6qgXYOVUHeAJ6kMHuJBXwQyHtNby7m89Rni7lHWPQKu8XxW82SAVJ7R6saujnBw0BRSwOHs1Oo3q3zIPKNUPNCH0UbMRODm/TeI9e3QQQCKP6gdYhf5zLz/x58bpJ62Putfz8hVJDU+FeRGrwonu54Hodg9O6C4x+BoaiY8magUUCe0EoZvon9bGxwtwVoi/+3QdUBcQEkjRk/ljTQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=PxilyXXdM6Ve7rkFM6qZeXu7Rm7nXpj1Ft7ycoSTWvY=; b=KfJloRyjJcaIVYlp3Q5VLUWSMh0aIEDIdlXTcC4LM1Mi3WwV57mJhRlmxGDfx1pkAEXeOuYlA/Taco797iIi+5r9/hF1W26YGBCCZk0FRii3Zi8E69/fH/p15zBsH2kH4LDSU+RuNRorJevkVAMx6IWbEYfVojQx0CBam09xJULXeDnFQtzIM3VCeAxR+azr42T6zoselKhJROlRhnrzJVJx3xXaummoe1kaZCcdsDneKBwynNJ7sLznALNRcEinKYQC+aSdoSkW2alkV/FZz9U6WN4OLoXyh677a2I8hhtPDEXi2MIT7f54dvff4XoYZkQiTKzg9cTKL+fayVNTrA== 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=PxilyXXdM6Ve7rkFM6qZeXu7Rm7nXpj1Ft7ycoSTWvY=; b=gl6WvI5lT0cZTQAzxc/+quMxrAwy5uSMKdffxHjpWZS+ET6JJAhkNJC8mYJSiEt3JFumlXUAKMjiYqM4IzPLhPaKEOPvC50kbfhfcsM0jmlF4Sni/v95s+nPBOOSb7UwlbTSj+/0e+hc3W8kVOSvE4TmaJ5+CXc5KOV81re4XcA= Received: from SN7PR10MB6287.namprd10.prod.outlook.com (2603:10b6:806:26d::14) by CY8PR10MB6657.namprd10.prod.outlook.com (2603:10b6:930:55::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7875.17; Thu, 15 Aug 2024 15:04:10 +0000 Received: from SN7PR10MB6287.namprd10.prod.outlook.com ([fe80::5a47:2d75:eef9:1d29]) by SN7PR10MB6287.namprd10.prod.outlook.com ([fe80::5a47:2d75:eef9:1d29%3]) with mapi id 15.20.7897.007; Thu, 15 Aug 2024 15:04:10 +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 , Nick Alcock , Alan Maguire , Masahiro Yamada , Steven Rostedt , Luis Chamberlain , Masami Hiramatsu , Nick Desaulniers , Jiri Olsa , Elena Zannoni Subject: [PATCH v6 3/4] scripts: add verifier script for builtin module range data Date: Thu, 15 Aug 2024 11:03:38 -0400 Message-ID: <20240815150339.1564769-4-kris.van.hees@oracle.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240815150339.1564769-1-kris.van.hees@oracle.com> References: <20240815150339.1564769-1-kris.van.hees@oracle.com> X-ClientProxiedBy: YTBP288CA0014.CANP288.PROD.OUTLOOK.COM (2603:10b6:b01:14::27) To SN7PR10MB6287.namprd10.prod.outlook.com (2603:10b6:806:26d::14) Precedence: bulk X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN7PR10MB6287:EE_|CY8PR10MB6657:EE_ X-MS-Office365-Filtering-Correlation-Id: 082b28f7-5afb-4f99-3b86-08dcbd3b8453 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|376014; 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:SN7PR10MB6287.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(1800799024)(7416014)(376014);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: 082b28f7-5afb-4f99-3b86-08dcbd3b8453 X-MS-Exchange-CrossTenant-AuthSource: SN7PR10MB6287.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Aug 2024 15:04:10.1680 (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: QImydNtPPb2QLibdae2OFg7i6R1buPSd/oP8tn73MWOtkll38G2kHlcymoI2zfbGU40TmfwoQhF5SkusWi5c0EtTXKoLfY2GrPVQykqIhHk= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR10MB6657 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-08-15_07,2024-08-15_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 mlxscore=0 bulkscore=0 phishscore=0 malwarescore=0 suspectscore=0 spamscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2407110000 definitions=main-2408150109 X-Proofpoint-ORIG-GUID: DFW-iZCXOjOmk8yPftHR_PkPht07pJEO X-Proofpoint-GUID: DFW-iZCXOjOmk8yPftHR_PkPht07pJEO The modules.builtin.ranges offset range data for builtin modules is generated at compile time based on the list of built-in modules and the vmlinux.map and vmlinux.o.map linker maps. This data can be used to determine whether a symbol at a particular address belongs to module code that was configured to be compiled into the kernel proper as a built-in module (rather than as a standalone module). This patch adds a script that uses the generated modules.builtin.ranges data to annotate the symbols in the System.map with module names if their address falls within a range that belongs to one or more built-in modules. It then processes the vmlinux.map (and if needed, vmlinux.o.map) to verify the annotation: - For each top-level section: - For each object in the section: - Determine whether the object is part of a built-in module (using modules.builtin and the .*.cmd file used to compile the object as suggested in [0]) - For each symbol in that object, verify that the built-in module association (or lack thereof) matches the annotation given to the symbol. Signed-off-by: Kris Van Hees Reviewed-by: Nick Alcock Reviewed-by: Alan Maguire --- Changes since v5: - Added optional 6th argument to specify kernel build directory. - Report error and exit if .*.o.cmd files cannot be read. Changes since v4: - New patch in the series --- scripts/verify_builtin_ranges.awk | 365 ++++++++++++++++++++++++++++++ 1 file changed, 365 insertions(+) create mode 100755 scripts/verify_builtin_ranges.awk diff --git a/scripts/verify_builtin_ranges.awk b/scripts/verify_builtin_ranges.awk new file mode 100755 index 000000000000..b82cf0a0fbeb --- /dev/null +++ b/scripts/verify_builtin_ranges.awk @@ -0,0 +1,365 @@ +#!/usr/bin/gawk -f +# SPDX-License-Identifier: GPL-2.0 +# verify_builtin_ranges.awk: Verify address range data for builtin modules +# Written by Kris Van Hees +# +# Usage: verify_builtin_ranges.awk modules.builtin.ranges System.map \ +# modules.builtin vmlinux.map vmlinux.o.map \ +# [ ] +# + +# Return the module name(s) (if any) associated with the given object. +# +# If we have seen this object before, return information from the cache. +# Otherwise, retrieve it from the corresponding .cmd file. +# +function get_module_info(fn, mod, obj, mfn, s) { + if (fn in omod) + return omod[fn]; + + if (match(fn, /\/[^/]+$/) == 0) + return ""; + + obj = fn; + mod = ""; + mfn = ""; + fn = kdir "/" substr(fn, 1, RSTART) "." substr(fn, RSTART + 1) ".cmd"; + if (getline s 0) { + mfn = substr(s, RSTART + 16, RLENGTH - 16); + gsub(/['"]/, "", mfn); + + mod = mfn; + gsub(/([^/ ]*\/)+/, "", mod); + gsub(/-/, "_", mod); + } + } else { + print "ERROR: Failed to read: " fn "\n\n" \ + " Invalid kernel build directory (" kdir ")\n" \ + " or its content does not match " ARGV[1] >"/dev/stderr"; + close(fn); + total = 0; + exit(1); + } + close(fn); + + # A single module (common case) also reflects objects that are not part + # of a module. Some of those objects have names that are also a module + # name (e.g. core). We check the associated module file name, and if + # they do not match, the object is not part of a module. + if (mod !~ / /) { + if (!(mod in mods)) + return ""; + if (mods[mod] != mfn) + return ""; + } + + # At this point, mod is a single (valid) module name, or a list of + # module names (that do not need validation). + omod[obj] = mod; + close(fn); + + return mod; +} + +# Return a representative integer value for a given hexadecimal address. +# +# Since all kernel addresses fall within the same memory region, we can safely +# strip off the first 6 hex digits before performing the hex-to-dec conversion, +# thereby avoiding integer overflows. +# +function addr2val(val) { + sub(/^0x/, "", val); + if (length(val) == 16) + val = substr(val, 5); + return strtonum("0x" val); +} + +# Determine the kernel build directory to use (default is .). +# +BEGIN { + if (ARGC > 6) { + kdir = ARGV[ARGC - 1]; + ARGV[ARGC - 1] = ""; + } else + kdir = "."; +} + +# (1) Load the built-in module address range data. +# +ARGIND == 1 { + ranges[FNR] = $0; + rcnt++; + next; +} + +# (2) Annotate System.map symbols with module names. +# +ARGIND == 2 { + addr = addr2val($1); + name = $3; + + while (addr >= mod_eaddr) { + if (sect_symb) { + if (sect_symb != name) + next; + + sect_base = addr - sect_off; + if (dbg) + printf "[%s] BASE (%s) %016x - %016x = %016x\n", sect_name, sect_symb, addr, sect_off, sect_base >"/dev/stderr"; + sect_symb = 0; + } + + if (++ridx > rcnt) + break; + + $0 = ranges[ridx]; + sub(/-/, " "); + if ($4 != "=") { + sub(/-/, " "); + mod_saddr = strtonum("0x" $2) + sect_base; + mod_eaddr = strtonum("0x" $3) + sect_base; + $1 = $2 = $3 = ""; + sub(/^ +/, ""); + mod_name = $0; + + if (dbg) + printf "[%s] %s from %016x to %016x\n", sect_name, mod_name, mod_saddr, mod_eaddr >"/dev/stderr"; + } else { + sect_name = $1; + sect_off = strtonum("0x" $2); + sect_symb = $5; + } + } + + idx = addr"-"name; + if (addr >= mod_saddr && addr < mod_eaddr) + sym2mod[idx] = mod_name; + + next; +} + +# Once we are done annotating the System.map, we no longer need the ranges data. +# +FNR == 1 && ARGIND == 3 { + delete ranges; +} + +# (3) Build a lookup map of built-in module names. +# +# Lines from modules.builtin will be like: +# kernel/crypto/lzo-rle.ko +# and we derive the built-in module name from this as "lzo_rle" and associate +# it with object name "crypto/lzo-rle". +# +ARGIND == 3 { + sub(/kernel\//, ""); # strip off "kernel/" prefix + sub(/\.ko$/, ""); # strip off .ko suffix + + mod = $1; + sub(/([^/]*\/)+/, "", mod); # mod = basename($1) + gsub(/-/, "_", mod); # Convert - to _ + + mods[mod] = $1; + next; +} + +# (4) Get a list of symbols (per object). +# +# Symbols by object are read from vmlinux.map, with fallback to vmlinux.o.map +# if vmlinux is found to have inked in vmlinux.o. +# + +# If we were able to get the data we need from vmlinux.map, there is no need to +# process vmlinux.o.map. +# +FNR == 1 && ARGIND == 5 && total > 0 { + if (dbg) + printf "Note: %s is not needed.\n", FILENAME >"/dev/stderr"; + exit; +} + +# First determine whether we are dealing with a GNU ld or LLVM lld linker map. +# +ARGIND >= 4 && FNR == 1 && NF == 7 && $1 == "VMA" && $7 == "Symbol" { + map_is_lld = 1; + next; +} + +# (LLD) Convert a section record fronm lld format to ld format. +# +ARGIND >= 4 && map_is_lld && NF == 5 && /[0-9] [^ ]/ { + $0 = $5 " 0x"$1 " 0x"$3 " load address 0x"$2; +} + +# (LLD) Convert an object record from lld format to ld format. +# +ARGIND >= 4 && map_is_lld && NF == 5 && $5 ~ /:\(\./ { + gsub(/\)/, ""); + sub(/:\(/, " "); + sub(/ vmlinux\.a\(/, " "); + $0 = " "$6 " 0x"$1 " 0x"$3 " " $5; +} + +# (LLD) Convert a symbol record from lld format to ld format. +# +ARGIND >= 4 && map_is_lld && NF == 5 && $5 ~ /^[A-Za-z_][A-Za-z0-9_]*$/ { + $0 = " 0x" $1 " " $5; +} + +# (LLD) We do not need any other ldd linker map records. +# +ARGIND >= 4 && map_is_lld && /^[0-9a-f]{16} / { + next; +} + +# Handle section records with long section names (spilling onto a 2nd line). +# +ARGIND >= 4 && !map_is_lld && NF == 1 && /^[^ ]/ { + s = $0; + getline; + $0 = s " " $0; +} + +# Next section - previous one is done. +# +ARGIND >= 4 && /^[^ ]/ { + sect = 0; +} + +# Get the (top level) section name. +# +ARGIND >= 4 && /^[^ ]/ && $2 ~ /^0x/ && $3 ~ /^0x/ { + # Empty section or per-CPU section - ignore. + if (NF < 3 || $1 ~ /\.percpu/) { + sect = 0; + next; + } + + sect = $1; + + next; +} + +# If we are not currently in a section we care about, ignore records. +# +!sect { + next; +} + +# Handle object records with long section names (spilling onto a 2nd line). +# +ARGIND >= 4 && /^ [^ \*]/ && NF == 1 { + # If the section name is long, the remainder of the entry is found on + # the next line. + s = $0; + getline; + $0 = s " " $0; +} + +# If the object is vmlinux.o, we need to consult vmlinux.o.map for per-object +# symbol information +# +ARGIND == 4 && /^ [^ ]/ && NF == 4 { + idx = sect":"$1; + if (!(idx in sect_addend)) { + sect_addend[idx] = addr2val($2); + if (dbg) + printf "ADDEND %s = %016x\n", idx, sect_addend[idx] >"/dev/stderr"; + } + if ($4 == "vmlinux.o") { + need_o_map = 1; + next; + } +} + +# If data from vmlinux.o.map is needed, we only process section and object +# records from vmlinux.map to determine which section we need to pay attention +# to in vmlinux.o.map. So skip everything else from vmlinux.map. +# +ARGIND == 4 && need_o_map { + next; +} + +# Get module information for the current object. +# +ARGIND >= 4 && /^ [^ ]/ && NF == 4 { + msect = $1; + mod_name = get_module_info($4); + mod_eaddr = addr2val($2) + addr2val($3); + + next; +} + +# Process a symbol record. +# +# Evaluate the module information obtained from vmlinux.map (or vmlinux.o.map) +# as follows: +# - For all symbols in a given object: +# - If the symbol is annotated with the same module name(s) that the object +# belongs to, count it as a match. +# - Otherwise: +# - If the symbol is known to have duplicates of which at least one is +# in a built-in module, disregard it. +# - If the symbol us not annotated with any module name(s) AND the +# object belongs to built-in modules, count it as missing. +# - Otherwise, count it as a mismatch. +# +ARGIND >= 4 && /^ / && NF == 2 && $1 ~ /^0x/ { + idx = sect":"msect; + if (!(idx in sect_addend)) + next; + + addr = addr2val($1); + + # Handle the rare but annoying case where a 0-size symbol is placed at + # the byte *after* the module range. Based on vmlinux.map it will be + # considered part of the current object, but it falls just beyond the + # module address range. Unfortunately, its address could be at the + # start of another built-in module, so the only safe thing to do is to + # ignore it. + if (mod_name && addr == mod_eaddr) + next; + + # If we are processing vmlinux.o.map, we need to apply the base address + # of the section to the relative address on the record. + # + if (ARGIND == 5) + addr += sect_addend[idx]; + + idx = addr"-"$2; + mod = ""; + if (idx in sym2mod) { + mod = sym2mod[idx]; + if (sym2mod[idx] == mod_name) { + mod_matches++; + matches++; + } else if (mod_name == "") { + print $2 " in " sym2mod[idx] " (should NOT be)"; + mismatches++; + } else { + print $2 " in " sym2mod[idx] " (should be " mod_name ")"; + mismatches++; + } + } else if (mod_name != "") { + print $2 " should be in " mod_name; + missing++; + } else + matches++; + + total++; + + next; +} + +# Issue the comparison report. +# +END { + if (total) { + printf "Verification of %s:\n", ARGV[1]; + printf " Correct matches: %6d (%d%% of total)\n", matches, 100 * matches / total; + printf " Module matches: %6d (%d%% of matches)\n", mod_matches, 100 * mod_matches / matches; + printf " Mismatches: %6d (%d%% of total)\n", mismatches, 100 * mismatches / total; + printf " Missing: %6d (%d%% of total)\n", missing, 100 * missing / total; + } +}