From patchwork Mon Aug 6 13:38:56 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vasily Gorbik X-Patchwork-Id: 10557157 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 96C01157B for ; Mon, 6 Aug 2018 13:39:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 83978294D5 for ; Mon, 6 Aug 2018 13:39:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 77B48294EB; Mon, 6 Aug 2018 13:39:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 19A1A294D5 for ; Mon, 6 Aug 2018 13:39:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727582AbeHFPsM (ORCPT ); Mon, 6 Aug 2018 11:48:12 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:46176 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1730869AbeHFPsM (ORCPT ); Mon, 6 Aug 2018 11:48:12 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w76DO2w2095821 for ; Mon, 6 Aug 2018 09:39:02 -0400 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0b-001b2d01.pphosted.com with ESMTP id 2kpq550pf4-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 06 Aug 2018 09:39:01 -0400 Received: from localhost by e06smtp07.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 6 Aug 2018 14:38:59 +0100 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w76DcwTw33423586 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 6 Aug 2018 13:38:58 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5178242047; Mon, 6 Aug 2018 16:39:07 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1FA2C42042; Mon, 6 Aug 2018 16:39:07 +0100 (BST) Received: from localhost (unknown [9.152.212.144]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Mon, 6 Aug 2018 16:39:07 +0100 (BST) Date: Mon, 6 Aug 2018 15:38:56 +0200 From: Vasily Gorbik To: Masahiro Yamada , Michal Marek Cc: linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org Subject: [PATCH] kbuild: add Map option to save vmlinux linker map file(s) MIME-Version: 1.0 Content-Disposition: inline X-TM-AS-GCONF: 00 x-cbid: 18080613-0028-0000-0000-000002E6360B X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18080613-0029-0000-0000-0000239E586E Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-06_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808060143 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add "Map" kbuild option, so that "make Map=1" would save vmlinux linker map into vmlinux.map, which is quite useful during making kernel changes related to how the kernel is composed. KBUILD_SAVE_LINK_MAP flag is exported and architectures supporting compressed kernel images might respect it and produce arch/*/boot/compressed/vmlinux.map for the decompressor code as well. Signed-off-by: Vasily Gorbik --- .gitignore | 1 + Makefile | 14 ++++++++++++++ 2 files changed, 15 insertions(+) diff --git a/.gitignore b/.gitignore index 97ba6b79834c..1d2308e597ad 100644 --- a/.gitignore +++ b/.gitignore @@ -44,6 +44,7 @@ *.xz Module.symvers modules.builtin +vmlinux.map # # Top-level generic files diff --git a/Makefile b/Makefile index 7a3c4548162b..f1790deae03b 100644 --- a/Makefile +++ b/Makefile @@ -176,6 +176,14 @@ ifndef KBUILD_CHECKSRC KBUILD_CHECKSRC = 0 endif +# Use 'make Map=1' to enable saving linker map file(s): +# vmlinux.map for vmlinux, +# (arch/*/boot/compressed/vmlinux.map for arch/*/boot/compressed/vmlinux) + +ifeq ("$(origin Map)", "command line") + export KBUILD_SAVE_LINK_MAP := $(Map) +endif + # Use make M=dir to specify directory of external module to build # Old syntax make ... SUBDIRS=$PWD is still supported # Setting the environment variable KBUILD_EXTMOD take precedence @@ -838,6 +846,11 @@ ifeq ($(CONFIG_STRIP_ASM_SYMS),y) LDFLAGS_vmlinux += $(call ld-option, -X,) endif +ifdef KBUILD_SAVE_LINK_MAP +LDFLAGS_vmlinux += -Map=vmlinux.map +CLEAN_FILES += vmlinux.map +endif + # insure the checker run with the right endianness CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian) @@ -1434,6 +1447,7 @@ help: @echo ' 2: warnings which occur quite often but may still be relevant' @echo ' 3: more obscure warnings, can most likely be ignored' @echo ' Multiple levels can be combined with W=12 or W=123' + @echo ' make Map=1 [targets] Save vmlinux linker map file(s)' @echo '' @echo 'Execute "make" or "make all" to build all targets marked with [*] ' @echo 'For further info see the ./README file'