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 and string redirection for gdb.execute, we depend on gdb >= 7.2. This feature is enabled via CONFIG_GDB_SCRIPTS.
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| @@ -36,6 +36,7 @@ subdir-$(CONFIG_MODVERSIONS) += genksyms · 35 unmodified lines | ||
| 36 | 36 | subdir-y += mod |
| 37 | 37 | subdir-$(CONFIG_SECURITY_SELINUX) += selinux |
| 38 | 38 | subdir-$(CONFIG_DTC) += dtc |
| 39 | +subdir-$(CONFIG_GDB_SCRIPTS) += gdb | |
| 39 | 40 | |
| 40 | 41 | # Let clean descend into subdirs |
| 41 | 42 | subdir- += basic kconfig package |
| @@ -0,0 +1 @@ | ||
| 1 | +subdir-y := linux | |
| @@ -0,0 +1,11 @@ | ||
| 1 | +always := gdb-scripts | |
| 2 | + | |
| 3 | +SRCTREE := $(shell cd $(srctree) && /bin/pwd) | |
| 4 | + | |
| 5 | +$(obj)/gdb-scripts: | |
| 6 | +ifneq ($(KBUILD_SRC),) | |
| 7 | + $(Q)ln -fsn $(SRCTREE)/$(obj)/*.py $(objtree)/$(obj) | |
| 8 | +endif | |
| 9 | + @: | |
| 10 | + | |
| 11 | +clean-files := *.pyc *.pyo $(if $(KBUILD_SRC),*.py) | |
| @@ -0,0 +1,23 @@ | ||
| 1 | +# | |
| 2 | +# gdb helper commands and functions for Linux kernel debugging | |
| 3 | +# | |
| 4 | +# loader module | |
| 5 | +# | |
| 6 | +# Copyright (c) Siemens AG, 2012, 2013 | |
| 7 | +# | |
| 8 | +# Authors: | |
| 9 | +# Jan Kiszka <jan.kiszka@siemens.com> | |
| 10 | +# | |
| 11 | +# This work is licensed under the terms of the GNU GPL version 2. | |
| 12 | +# | |
| 13 | + | |
| 14 | +import os | |
| 15 | + | |
| 16 | +sys.path.insert(0, os.path.dirname(__file__) + "/scripts/gdb") | |
| 17 | + | |
| 18 | +try: | |
| 19 | + gdb.parse_and_eval("0") | |
| 20 | + gdb.execute("", to_string=True) | |
| 21 | +except: | |
| 22 | + gdb.write("NOTE: gdb 7.2 or later required for Linux helper scripts to " | |
| 23 | + "work.\n") | |