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 <objfile>-gdb.py when opening <objfile>. 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. This feature depends on CONFIG_DEBUG_INFO. CC: Michal Marek <mmarek@xxxxxxx> CC: linux-kbuild@xxxxxxxxxxxxxxx Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx> --- Makefile | 5 ++++- scripts/Makefile | 3 ++- scripts/gdb/Makefile | 9 +++++++++ scripts/gdb/vmlinux-gdb.py | 20 ++++++++++++++++++++ 4 files changed, 35 insertions(+), 2 deletions(-) create mode 100644 scripts/gdb/Makefile create mode 100644 scripts/gdb/vmlinux-gdb.py diff --git a/Makefile b/Makefile index a1ccf22..6af7c03 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, @@ -1013,7 +1016,7 @@ 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/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py new file mode 100644 index 0000000..00df617 --- /dev/null +++ b/scripts/gdb/vmlinux-gdb.py @@ -0,0 +1,20 @@ +# +# gdb helper commands and functions for Linux kernel debugging +# +# loader module +# +# Copyright (c) 2012 Siemens AG +# +# Authors: +# Jan Kiszka <jan.kiszka@xxxxxxxxxxx> +# +# 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 + +if not gdb.VERSION >= "7.1": + print "NOTE: gdb 7.1 or later required for Linux helper scripts " \ + "to work." -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
