From patchwork Tue Apr 14 01:39:16 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenji Huang X-Patchwork-Id: 17989 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n3E1iKip009448 for ; Tue, 14 Apr 2009 01:44:20 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753248AbZDNBnp (ORCPT ); Mon, 13 Apr 2009 21:43:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752104AbZDNBnp (ORCPT ); Mon, 13 Apr 2009 21:43:45 -0400 Received: from rcsinet12.oracle.com ([148.87.113.124]:18048 "EHLO rgminet12.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752234AbZDNBno (ORCPT ); Mon, 13 Apr 2009 21:43:44 -0400 Received: from acsinet13.oracle.com (acsinet13.oracle.com [141.146.126.235]) by rgminet12.oracle.com (Switch-3.3.1/Switch-3.3.1) with ESMTP id n3E1hAsB019538 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 14 Apr 2009 01:43:11 GMT Received: from acsmt704.oracle.com (acsmt704.oracle.com [141.146.40.82]) by acsinet13.oracle.com (Switch-3.3.1/Switch-3.3.1) with ESMTP id n3E1hoYO016133; Tue, 14 Apr 2009 01:43:51 GMT Received: from dhcp-beijing-cdc-10-182-120-164.cn.oracle.com (/10.182.120.164) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 14 Apr 2009 01:43:20 +0000 Message-ID: <49E3E944.2040505@oracle.com> Date: Tue, 14 Apr 2009 09:39:16 +0800 From: Wenji Huang Reply-To: wenji.huang@oracle.com User-Agent: Thunderbird 2.0.0.12 (X11/20080213) MIME-Version: 1.0 To: linux-kbuild@vger.kernel.org CC: tytso@MIT.EDU, Elena Zannoni , Roland McGrath , LKML Subject: [Fwd: [PATCH 1/1] Separate the debuginfo out from kbuild] X-Source-IP: acsmt704.oracle.com [141.146.40.82] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A010201.49E3EA3A.0173:SCFMA4539814,ss=1,fgs=0 Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org Add Roland to cc -------- Original Message -------- Subject: [PATCH 1/1] Separate the debuginfo out from kbuild Date: Wed, 8 Apr 2009 22:06:21 -0400 From: Wenji Huang To: linux-kbuild@vger.kernel.org CC: linux-kernel@vger.kernel.org, tytso@MIT.EDU, elena.zannoni@oracle.com, Wenji Huang This patch will add "make debug_info" to split debuginfo files. The separate debug files are under debug directory of building tree. It is based on two considerations: * The debuginfo extracting machinery could be integrated into the kbuild system. This way it's not just done via RPM macros. So generating debuginfo RPMS or something alike can be simplified and standardized, also distribution independent. * Reduce the size of current file which mixes executable and debug sections. For example, 7% off for vmlinux. Signed-off-by: Wenji Huang --- Makefile | 14 ++++++++++++++ scripts/Makefile.modpost | 12 ++++++++++++ 2 files changed, 26 insertions(+), 0 deletions(-) # --------------------------------------------------------------------------- diff --git a/Makefile b/Makefile index e5ad5fd..0df7581 100644 --- a/Makefile +++ b/Makefile @@ -832,6 +832,19 @@ define rule_vmlinux-modpost $(Q)echo 'cmd_$@ := $(cmd_vmlinux-modpost)' > $(dot-target).cmd endef +quiet_cmd_vmlinux_debug = GEN $<.debug + cmd_vmlinux_debug = mkdir -p debug; \ + $(OBJCOPY) --only-keep-debug \ + $< debug/$<.debug +targets += vmlinux.debug + +PHONY += debug_info +debug_info: vmlinux FORCE +ifdef CONFIG_DEBUG_INFO + $(call if_changed,vmlinux_debug) + $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost $@ +endif + # vmlinux image - including updated kernel symbols vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o $(kallsyms.o) FORCE ifdef CONFIG_HEADERS_CHECK @@ -1278,6 +1291,7 @@ help: @echo ' all - Build all targets marked with [*]' @echo '* vmlinux - Build the bare kernel' @echo '* modules - Build all modules' + @echo ' debug_info - Extract debug info to debug directory' @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' @echo ' firmware_install- Install all firmware to INSTALL_FW_PATH' @echo ' (default: $$(INSTALL_MOD_PATH)/lib/firmware)' diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost index f4053dc..c120261 100644 --- a/scripts/Makefile.modpost +++ b/scripts/Makefile.modpost @@ -137,6 +137,18 @@ $(modules): %.ko :%.o %.mod.o FORCE targets += $(modules) +modules-debug := $(modules:.ko=.ko.debug) +quiet_cmd_debug_ko = GEN $@ + cmd_debug_ko = mkdir -p debug/$(dir $@); \ + $(OBJCOPY) --only-keep-debug $< debug/$@ +targets += $(modules-debug) + +debug_info: $(modules-debug) FORCE + +ifdef CONFIG_DEBUG_INFO +$(modules-debug): $(modules) FORCE + $(call if_changed,debug_ko) +endif # Add FORCE to the prequisites of a target to force it to be always rebuilt.