From 3ee7b3fa2cd0182628cca8d9bb5ce2d4722e8dc5 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Tue, 17 Feb 2015 13:46:36 -0800 Subject: scripts/gdb: add infrastructure 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 and string redirection for gdb.execute, we depend on gdb >= 7.2. This feature is enabled via CONFIG_GDB_SCRIPTS. Signed-off-by: Jan Kiszka Acked-by: Michal Marek [kbuild stuff] Cc: Thomas Gleixner Cc: Jason Wessel Cc: Andi Kleen Cc: Ben Widawsky Cc: Borislav Petkov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/Makefile | 1 + scripts/gdb/Makefile | 1 + scripts/gdb/linux/Makefile | 11 +++++++++++ scripts/gdb/vmlinux-gdb.py | 23 +++++++++++++++++++++++ 4 files changed, 36 insertions(+) create mode 100644 scripts/gdb/Makefile create mode 100644 scripts/gdb/linux/Makefile create mode 100644 scripts/gdb/vmlinux-gdb.py (limited to 'scripts') diff --git a/scripts/Makefile b/scripts/Makefile index 72902b5f2721..2016a64497ab 100644 --- a/scripts/Makefile +++ b/scripts/Makefile @@ -36,6 +36,7 @@ subdir-$(CONFIG_MODVERSIONS) += genksyms subdir-y += mod subdir-$(CONFIG_SECURITY_SELINUX) += selinux subdir-$(CONFIG_DTC) += dtc +subdir-$(CONFIG_GDB_SCRIPTS) += gdb # Let clean descend into subdirs subdir- += basic kconfig package diff --git a/scripts/gdb/Makefile b/scripts/gdb/Makefile new file mode 100644 index 000000000000..62f5f65becfd --- /dev/null +++ b/scripts/gdb/Makefile @@ -0,0 +1 @@ +subdir-y := linux diff --git a/scripts/gdb/linux/Makefile b/scripts/gdb/linux/Makefile new file mode 100644 index 000000000000..6cf1ecf61057 --- /dev/null +++ b/scripts/gdb/linux/Makefile @@ -0,0 +1,11 @@ +always := gdb-scripts + +SRCTREE := $(shell cd $(srctree) && /bin/pwd) + +$(obj)/gdb-scripts: +ifneq ($(KBUILD_SRC),) + $(Q)ln -fsn $(SRCTREE)/$(obj)/*.py $(objtree)/$(obj) +endif + @: + +clean-files := *.pyc *.pyo $(if $(KBUILD_SRC),*.py) diff --git a/scripts/gdb/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py new file mode 100644 index 000000000000..c1d90cea5288 --- /dev/null +++ b/scripts/gdb/vmlinux-gdb.py @@ -0,0 +1,23 @@ +# +# gdb helper commands and functions for Linux kernel debugging +# +# loader module +# +# Copyright (c) Siemens AG, 2012, 2013 +# +# Authors: +# Jan Kiszka +# +# This work is licensed under the terms of the GNU GPL version 2. +# + +import os + +sys.path.insert(0, os.path.dirname(__file__) + "/scripts/gdb") + +try: + gdb.parse_and_eval("0") + gdb.execute("", to_string=True) +except: + gdb.write("NOTE: gdb 7.2 or later required for Linux helper scripts to " + "work.\n") -- cgit v1.2.3