| # SPDX-License-Identifier: GPL-2.0 |
| # Copyright 2019 Google LLC. |
| class LxConfigDump(gdb.Command): |
| """Output kernel config to the filename specified as the command |
| argument. Equivalent to 'zcat /proc/config.gz > config.txt' on |
| super(LxConfigDump, self).__init__("lx-configdump", gdb.COMMAND_DATA, |
| def invoke(self, arg, from_tty): |
| 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") |
| raise gdb.GdbError("Can't find config, enable CONFIG_IKCONFIG?") |
| 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: |
| gdb.write("Dumped config to " + filename + "\n") |