# SPDX-License-Identifier: GPL-2.0## Copyright 2019 Google LLC. import gdbimport 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 + 8")            py_config_size = gdb.parse_and_eval(                    "sizeof(kernel_config_data) - 1 - 8 * 2")        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()