Atlas - print_sym_info.py
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1# Loads a Kconfig and a .config and prints a symbol.
2#
3# Usage:
4#
5#   $ make [ARCH=<arch>] scriptconfig SCRIPT=Kconfiglib/examples/print_sym_info.py SCRIPT_ARG=<name>
6#
7# Example output for SCRIPT_ARG=MODULES:
8#
9# menuconfig MODULES
10# 	bool
11# 	prompt "Enable loadable module support"
12# 	option modules
13# 	help
14# 	  Kernel modules are small pieces of compiled code which can
15# 	  be inserted in the running kernel, rather than being
16# 	  permanently built into the kernel.  You use the "modprobe"
17# 	  tool to add (and sometimes remove) them.  If you say Y here,
18# 	  many parts of the kernel can be built as modules (by
19# 	  answering M instead of Y where indicated): this is most
20# 	  useful for infrequently used options which are not required
21# 	  for booting.  For more information, see the man pages for
22# 	  modprobe, lsmod, modinfo, insmod and rmmod.
23#
24# 	  If you say Y here, you will need to run "make
25# 	  modules_install" to put the modules under /lib/modules/
26# 	  where modprobe can find them (you may need to be root to do
27# 	  this).
28#
29# 	  If unsure, say Y.
30#
31# value = n
32# visibility = y
33# currently assignable values: n, y
34# defined at init/Kconfig:1674
35
36import sys
37
38from kconfiglib import Kconfig, TRI_TO_STR
39
40
41if len(sys.argv) < 3:
42    sys.exit('Pass symbol name (without "CONFIG_" prefix) with SCRIPT_ARG=<name>')
43
44kconf = Kconfig(sys.argv[1])
45sym = kconf.syms[sys.argv[2]]
46
47print(sym)
48print("value = " + sym.str_value)
49print("visibility = " + TRI_TO_STR[sym.visibility])
50print("currently assignable values: " +
51      ", ".join([TRI_TO_STR[v] for v in sym.assignable]))
52
53for node in sym.nodes:
54    print("defined at {}:{}".format(node.filename, node.linenr))
55
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