diff options
Diffstat (limited to 'examples/print_sym_info.py')
| -rw-r--r-- | examples/print_sym_info.py | 56 |
1 files changed, 45 insertions, 11 deletions
diff --git a/examples/print_sym_info.py b/examples/print_sym_info.py index c913358..2c1b0f0 100644 --- a/examples/print_sym_info.py +++ b/examples/print_sym_info.py @@ -1,18 +1,52 @@ -# Loads a Kconfig and a .config and prints information about a symbol. +# Loads a Kconfig and a .config and prints a symbol. +# +# Usage: +# +# $ make [ARCH=<arch>] scriptconfig SCRIPT=Kconfiglib/examples/print_sym_info.py SCRIPT_ARG=<name> +# +# Example output for SCRIPT_ARG=modules: +# +# config MODULES +# bool +# prompt "Enable loadable module support" +# option modules +# help +# Kernel modules are small pieces of compiled code which can +# be inserted in the running kernel, rather than being +# permanently built into the kernel. You use the "modprobe" +# tool to add (and sometimes remove) them. If you say Y here, +# many parts of the kernel can be built as modules (by +# answering M instead of Y where indicated): this is most +# useful for infrequently used options which are not required +# for booting. For more information, see the man pages for +# modprobe, lsmod, modinfo, insmod and rmmod. +# +# If you say Y here, you will need to run "make +# modules_install" to put the modules under /lib/modules/ +# where modprobe can find them (you may need to be root to do +# this). +# +# If unsure, say Y. +# +# value = n +# visibility = y +# currently assignable values: n, y +# defined at init/Kconfig:1678 import kconfiglib import sys -# Create a Config object representing a Kconfig configuration. (Any number of -# these can be created -- the library has no global state.) +if len(sys.argv) < 3: + print('Pass symbol name (without "CONFIG_" prefix) with SCRIPT_ARG=<name>') + sys.exit(1) + conf = kconfiglib.Config(sys.argv[1]) +sym = conf.syms[sys.argv[2]] -# Load values from a .config file. 'srctree' is an environment variable set by -# the Linux makefiles to the top-level directory of the kernel tree. It needs -# to be used here for the script to work with alternative build directories -# (specified e.g. with O=). -conf.load_config("$srctree/arch/x86/configs/i386_defconfig") +print(sym) +print("value = " + sym.value) +print("visibility = " + sym.visibility) +print("currently assignable values: " + ", ".join(sym.assignable)) -# Print some information about a symbol. (The Config class implements -# __getitem__() to provide a handy syntax for getting symbols.) -print(conf["SERIAL_UARTLITE_CONSOLE"]) +for node in sym.nodes: + print("defined at {}:{}".format(node.filename, node.linenr)) |