From patchwork Mon Jan 21 17:06:08 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kiszka X-Patchwork-Id: 2013371 Return-Path: X-Original-To: patchwork-linux-kbuild@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id D2ACF3FD1A for ; Mon, 21 Jan 2013 17:24:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753923Ab3AURX7 (ORCPT ); Mon, 21 Jan 2013 12:23:59 -0500 Received: from david.siemens.de ([192.35.17.14]:21668 "EHLO david.siemens.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756053Ab3AURX6 (ORCPT ); Mon, 21 Jan 2013 12:23:58 -0500 Received: from mail1.siemens.de (localhost [127.0.0.1]) by david.siemens.de (8.13.6/8.13.6) with ESMTP id r0LH6N8d022391; Mon, 21 Jan 2013 18:06:23 +0100 Received: from mchn199C.mchp.siemens.de ([139.25.109.49]) by mail1.siemens.de (8.13.6/8.13.6) with ESMTP id r0LH6K9n025855; Mon, 21 Jan 2013 18:06:23 +0100 From: Jan Kiszka To: Andrew Morton , linux-kernel@vger.kernel.org Cc: Jason Wessel , kgdb-bugreport@lists.sourceforge.net, Andi Kleen , Tom Tromey , Ben Widawsky , Michal Marek , linux-kbuild@vger.kernel.org Subject: [PATCH v4 01/13] scripts/gdb: Add infrastructure Date: Mon, 21 Jan 2013 18:06:08 +0100 Message-Id: <1e49f090f16f3e22711a27f473e2ed604f6a249f.1358787929.git.jan.kiszka@siemens.com> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: References: In-Reply-To: References: Sender: linux-kbuild-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org This provides the basic infrastructure to load kernel-specific python helper scripts when debugging the kernel in gdb. The loading mechanism is based on gdb loading for -gdb.py when opening . Therefore, this places a corresponding link to the main helper script into the output directory that contains vmlinux. The main scripts will pull in submodules containing Linux specific gdb commands and functions. To avoid polluting the source directory with compiled python modules, we link to them from the object directory. Due to gdb.parse_and_eval, we depend on gdb >= 7.1. We need to pre-process the version string returned by gdb as some distros tend to prefix it with their name. This feature depends on CONFIG_DEBUG_INFO. CC: Michal Marek CC: linux-kbuild@vger.kernel.org Signed-off-by: Jan Kiszka --- Makefile | 5 ++++- scripts/Makefile | 3 ++- scripts/gdb/Makefile | 9 +++++++++ scripts/gdb/utils.py | 17 +++++++++++++++++ scripts/gdb/vmlinux-gdb.py | 22 ++++++++++++++++++++++ 5 files changed, 54 insertions(+), 2 deletions(-) create mode 100644 scripts/gdb/Makefile create mode 100644 scripts/gdb/utils.py create mode 100644 scripts/gdb/vmlinux-gdb.py diff --git a/Makefile b/Makefile index 253a455..fb18794 100644 --- a/Makefile +++ b/Makefile @@ -774,6 +774,9 @@ endif ifdef CONFIG_BUILD_DOCSRC $(Q)$(MAKE) $(build)=Documentation endif +ifdef CONFIG_DEBUG_INFO + $(Q)ln -fsn $(srctree)/scripts/gdb/vmlinux-gdb.py +endif +$(call if_changed,link-vmlinux) # The actual objects are generated when descending, @@ -1019,7 +1022,7 @@ MRPROPER_FILES += .config .config.old .version .old_version $(version_h) \ Module.symvers tags TAGS cscope* GPATH GTAGS GRTAGS GSYMS \ signing_key.priv signing_key.x509 x509.genkey \ extra_certificates signing_key.x509.keyid \ - signing_key.x509.signer + signing_key.x509.signer vmlinux-gdb.py # clean - Delete most, but leave enough to build external modules # diff --git a/scripts/Makefile b/scripts/Makefile index 01e7adb..3204b91 100644 --- a/scripts/Makefile +++ b/scripts/Makefile @@ -37,6 +37,7 @@ subdir-$(CONFIG_MODVERSIONS) += genksyms subdir-y += mod subdir-$(CONFIG_SECURITY_SELINUX) += selinux subdir-$(CONFIG_DTC) += dtc +subdir-$(CONFIG_DEBUG_INFO) += gdb # Let clean descend into subdirs -subdir- += basic kconfig package selinux +subdir- += basic kconfig package selinux gdb diff --git a/scripts/gdb/Makefile b/scripts/gdb/Makefile new file mode 100644 index 0000000..34ccd06 --- /dev/null +++ b/scripts/gdb/Makefile @@ -0,0 +1,9 @@ +always := gdb-scripts + +$(obj)/gdb-scripts: +ifneq ($(KBUILD_SRC),) + $(Q)ln -fsn $(srctree)/$(obj)/*.py $(objtree)/$(obj) +endif + @: + +clean-files := *.pyc $(if $(KBUILD_SRC),*.py) diff --git a/scripts/gdb/utils.py b/scripts/gdb/utils.py new file mode 100644 index 0000000..65a2e91 --- /dev/null +++ b/scripts/gdb/utils.py @@ -0,0 +1,17 @@ +# +# gdb helper commands and functions for Linux kernel debugging +# +# common utilities +# +# Copyright (c) Siemens AG, 2011, 2012 +# +# Authors: +# Jan Kiszka +# +# This work is licensed under the terms of the GNU GPL version 2. +# + +import gdb +import re + +gdb_version = re.sub("^[^0-9]*", "", gdb.VERSION) diff --git a/scripts/gdb/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py new file mode 100644 index 0000000..bcb45cc --- /dev/null +++ b/scripts/gdb/vmlinux-gdb.py @@ -0,0 +1,22 @@ +# +# gdb helper commands and functions for Linux kernel debugging +# +# loader module +# +# Copyright (c) Siemens AG, 2012 +# +# Authors: +# Jan Kiszka +# +# This work is licensed under the terms of the GNU GPL version 2. +# + +import os + +sys.path = [ os.path.dirname(__file__) + "/scripts/gdb" ] + sys.path + +from utils import gdb_version + +if gdb_version < "7.1": + print "NOTE: gdb 7.1 or later required for Linux helper scripts " \ + "to work."