From nobody Thu Nov 14 16:53:41 2024 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 8F922C001B0 for ; Tue, 8 Aug 2023 16:16:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232231AbjHHQPb (ORCPT ); Tue, 8 Aug 2023 12:15:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51580 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232217AbjHHQNn (ORCPT ); Tue, 8 Aug 2023 12:13:43 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 958AD7EEC; Tue, 8 Aug 2023 08:47:51 -0700 (PDT) X-UUID: d651f6a035c511eeb20a276fd37b9834-20230808 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=YAbalPSkEKWf6qATM+/2up2V7102RaSYQU2gp24pvGE=; b=Y9Tr3jyMnBdD4FjjZj5r7r92qYZxj9h9z2NDRhjdRY4g58Qn3e+i+E2E/p3MiZPmaTYB0BxVy9aFsORUw8kBzfWFpSJrIOYyYZYMjaUz44DTFQhCKiZBzQ/VutYvb7VXKr/WE4h5r+DsQg6oYKnB0uTUsR2YDOC3dGw0xuN5U+A=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.31,REQID:dc741943-75d7-4461-9c85-3e8892d586a3,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:1,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:1 X-CID-META: VersionHash:0ad78a4,CLOUDID:c03a04a1-0933-4333-8d4f-6c3c53ebd55b,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR: NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: d651f6a035c511eeb20a276fd37b9834-20230808 Received: from mtkmbs11n2.mediatek.inc [(172.21.101.187)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 128710964; Tue, 08 Aug 2023 16:30:31 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Tue, 8 Aug 2023 16:30:30 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Tue, 8 Aug 2023 16:30:30 +0800 From: Kuan-Ying Lee To: Jan Kiszka , Kieran Bingham , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , , , Kuan-Ying Lee , , Subject: [PATCH v2 2/8] scripts/gdb/modules: add get module text support Date: Tue, 8 Aug 2023 16:30:12 +0800 Message-ID: <20230808083020.22254-3-Kuan-Ying.Lee@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230808083020.22254-1-Kuan-Ying.Lee@mediatek.com> References: <20230808083020.22254-1-Kuan-Ying.Lee@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When we get an text address from coredump and we cannot find this address in vmlinux, it might located in kernel module. We want to know which kernel module it located in. This GDB scripts can help us to find the target kernel module. (gdb) lx-getmod-by-textaddr 0xffff800002d305ac 0xffff800002d305ac is in kasan_test.ko Signed-off-by: Kuan-Ying Lee --- scripts/gdb/linux/modules.py | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/scripts/gdb/linux/modules.py b/scripts/gdb/linux/modules.py index f76a43bfa15f..298dfcc25eae 100644 --- a/scripts/gdb/linux/modules.py +++ b/scripts/gdb/linux/modules.py @@ -97,5 +97,35 @@ class LxLsmod(gdb.Command): =20 gdb.write("\n") =20 - LxLsmod() + +def help(): + t =3D """Usage: lx-getmod-by-textaddr [Heximal Address] + Example: lx-getmod-by-textaddr 0xffff800002d305ac\n""" + gdb.write("Unrecognized command\n") + raise gdb.GdbError(t) + +class LxFindTextAddrinMod(gdb.Command): + '''Look up loaded kernel module by text address.''' + + def __init__(self): + super(LxFindTextAddrinMod, self).__init__('lx-getmod-by-textaddr',= gdb.COMMAND_SUPPORT) + + def invoke(self, arg, from_tty): + args =3D gdb.string_to_argv(arg) + + if len(args) !=3D 1: + help() + + addr =3D gdb.Value(int(args[0], 16)).cast(utils.get_ulong_type()) + for mod in module_list(): + mod_text_start =3D mod['mem'][constants.LX_MOD_TEXT]['base'] + mod_text_end =3D mod_text_start + mod['mem'][constants.LX_MOD_= TEXT]['size'].cast(utils.get_ulong_type()) + + if addr >=3D mod_text_start and addr < mod_text_end: + s =3D "0x%x" % addr + " is in " + mod['name'].string() + "= .ko\n" + gdb.write(s) + return + gdb.write("0x%x is not in any module text section\n" % addr) + +LxFindTextAddrinMod() --=20 2.18.0