config.py

# SPDX-License-Identifier: GPL-2.0
#
# Copyright 2019 Google LLC.

import gdb
import zlib

from linux import utils

class LxConfigDump(gdb.Command):
    """Output kernel config to the filename specified as the command
       argument. Equivalent to 'zcat /proc/config.gz > config.txt' on
       a running target"""

def __init__(self):
        super(LxConfigDump, self).__init__("lx-configdump", gdb.COMMAND_DATA,
                                           gdb.COMPLETE_FILENAME)

def invoke(self, arg, from_tty):
        if len(arg) == 0:
            filename = "config.txt"
        else:
            filename = arg

try:
            py_config_ptr = gdb.parse_and_eval("&kernel_config_data")
            py_config_ptr_end = gdb.parse_and_eval("&kernel_config_data_end")
            py_config_size = py_config_ptr_end - py_config_ptr
        except gdb.error as e:
            raise gdb.GdbError("Can't find config, enable CONFIG_IKCONFIG?")

inf = gdb.inferiors()[0]
        zconfig_buf = utils.read_memoryview(inf, py_config_ptr,
                                            py_config_size).tobytes()

config_buf = zlib.decompress(zconfig_buf, 16)
        with open(filename, 'wb') as f:
            f.write(config_buf)

gdb.write("Dumped config to " + filename + "\n")

LxConfigDump()

docroot: /var/www/469ed2f6-4d4b-4a8a-9f5e-ee4ef04d3bc8/public_html

curdir: /usr/src/linux-headers-6.8.0-100/scripts/gdb/linux

	.	4096
	..	4096
X	.gitignore	65
X	Makefile	667
X	__init__.py	55
X	clk.py	2630
X	config.py	1329
X	constants.py.in	4322
X	cpus.py	6424
X	device.py	5794
X	dmesg.py	5822
X	genpd.py	2715
X	interrupts.py	7838
X	lists.py	4261
X	mapletree.py	7337
X	mm.py	14115
X	modules.py	3937
X	page_owner.py	6997
X	pgtable.py	10322
X	proc.py	8791
X	radixtree.py	2515
X	rbtree.py	4733
X	slab.py	11542
X	stackdepot.py	1761
X	symbols.py	7277
X	tasks.py	3232
X	timerlist.py	7780
X	utils.py	6015
X	vfs.py	1446
X	vmalloc.py	2180
X	xarray.py	636