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44 lines
1.3 KiB
44 lines
1.3 KiB
# SPDX-License-Identifier: GPL-2.0 |
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# |
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# Copyright 2019 Google LLC. |
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import gdb |
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import zlib |
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from linux import utils |
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class LxConfigDump(gdb.Command): |
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"""Output kernel config to the filename specified as the command |
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argument. Equivalent to 'zcat /proc/config.gz > config.txt' on |
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a running target""" |
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def __init__(self): |
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super(LxConfigDump, self).__init__("lx-configdump", gdb.COMMAND_DATA, |
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gdb.COMPLETE_FILENAME) |
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def invoke(self, arg, from_tty): |
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if len(arg) == 0: |
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filename = "config.txt" |
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else: |
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filename = arg |
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try: |
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py_config_ptr = gdb.parse_and_eval("kernel_config_data + 8") |
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py_config_size = gdb.parse_and_eval( |
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"sizeof(kernel_config_data) - 1 - 8 * 2") |
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except gdb.error as e: |
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raise gdb.GdbError("Can't find config, enable CONFIG_IKCONFIG?") |
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inf = gdb.inferiors()[0] |
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zconfig_buf = utils.read_memoryview(inf, py_config_ptr, |
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py_config_size).tobytes() |
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config_buf = zlib.decompress(zconfig_buf, 16) |
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with open(filename, 'wb') as f: |
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f.write(config_buf) |
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gdb.write("Dumped config to " + filename + "\n") |
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LxConfigDump()
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