diff options
| author | Kieran Bingham <kieran.bingham@linaro.org> | 2016-05-23 16:24:40 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-23 17:04:14 -0700 |
| commit | f197d75fcad125f41cc6e2fdf1b3ea733db995f1 (patch) | |
| tree | d3d667d60a24dc5e9caeeb036bfb2781f53f9b56 /scripts | |
| parent | 0c22fde8b0e674a201f277688f1b3a38f6e09ada (diff) | |
scripts/gdb: provide linux constants
Some macro's and defines are needed when parsing memory, and without
compiling the kernel as -g3 they are not available in the debug-symbols.
We use the pre-processor here to extract constants to a dedicated module
for the linux debugger extensions
Top level Kbuild is used to call in and generate the constants file,
while maintaining dependencies on autogenerated files in
include/generated
Link: http://lkml.kernel.org/r/bc3df9c25f57ea72177c066a51a446fc19e2c27f.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/gdb/linux/Makefile | 12 | ||||
| -rw-r--r-- | scripts/gdb/linux/constants.py.in | 32 | ||||
| -rw-r--r-- | scripts/gdb/vmlinux-gdb.py | 1 |
3 files changed, 44 insertions, 1 deletions
diff --git a/scripts/gdb/linux/Makefile b/scripts/gdb/linux/Makefile index 6cf1ecf61057..cd129e65d1ff 100644 --- a/scripts/gdb/linux/Makefile +++ b/scripts/gdb/linux/Makefile @@ -8,4 +8,14 @@ ifneq ($(KBUILD_SRC),) endif @: -clean-files := *.pyc *.pyo $(if $(KBUILD_SRC),*.py) +quiet_cmd_gen_constants_py = GEN $@ + cmd_gen_constants_py = \ + $(CPP) -E -x c -P $(c_flags) $< > $@ ;\ + sed -i '1,/<!-- end-c-headers -->/d;' $@ + +$(obj)/constants.py: $(SRCTREE)/$(obj)/constants.py.in + $(call if_changed,gen_constants_py) + +build_constants_py: $(obj)/constants.py + +clean-files := *.pyc *.pyo $(if $(KBUILD_SRC),*.py) $(obj)/constants.py diff --git a/scripts/gdb/linux/constants.py.in b/scripts/gdb/linux/constants.py.in new file mode 100644 index 000000000000..79d9d0092452 --- /dev/null +++ b/scripts/gdb/linux/constants.py.in @@ -0,0 +1,32 @@ +/* + * gdb helper commands and functions for Linux kernel debugging + * + * Kernel constants derived from include files. + * + * Copyright (c) 2016 Linaro Ltd + * + * Authors: + * Kieran Bingham <kieran.bingham@linaro.org> + * + * This work is licensed under the terms of the GNU GPL version 2. + * + */ + +/* We need to stringify expanded macros so that they can be parsed */ +#define STRING(x) #x +#define XSTRING(x) STRING(x) + +#define LX_VALUE(x) LX_##x = x +#define LX_GDBPARSED(x) LX_##x = gdb.parse_and_eval(XSTRING(x)) + +/* + * IS_ENABLED generates (a || b) which is not compatible with python + * We can only switch on configuration items we know are available + * Therefore - IS_BUILTIN() is more appropriate + */ +#define LX_CONFIG(x) LX_##x = IS_BUILTIN(x) + +/* The build system will take care of deleting everything above this marker */ +<!-- end-c-headers --> + +import gdb diff --git a/scripts/gdb/vmlinux-gdb.py b/scripts/gdb/vmlinux-gdb.py index d5943eca19cd..6e0b0afd888a 100644 --- a/scripts/gdb/vmlinux-gdb.py +++ b/scripts/gdb/vmlinux-gdb.py @@ -30,3 +30,4 @@ else: import linux.cpus import linux.lists import linux.proc + import linux.constants |