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95 lines
2.5 KiB
95 lines
2.5 KiB
# |
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# gdb helper commands and functions for Linux kernel debugging |
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# |
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# module tools |
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# |
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# Copyright (c) Siemens AG, 2013 |
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# |
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# Authors: |
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# Jan Kiszka <[email protected]> |
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# |
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# This work is licensed under the terms of the GNU GPL version 2. |
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# |
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import gdb |
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from linux import cpus, utils, lists |
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module_type = utils.CachedType("struct module") |
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def module_list(): |
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global module_type |
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modules = utils.gdb_eval_or_none("modules") |
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if modules is None: |
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return |
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module_ptr_type = module_type.get_type().pointer() |
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for module in lists.list_for_each_entry(modules, module_ptr_type, "list"): |
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yield module |
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def find_module_by_name(name): |
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for module in module_list(): |
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if module['name'].string() == name: |
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return module |
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return None |
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class LxModule(gdb.Function): |
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"""Find module by name and return the module variable. |
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$lx_module("MODULE"): Given the name MODULE, iterate over all loaded modules |
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of the target and return that module variable which MODULE matches.""" |
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def __init__(self): |
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super(LxModule, self).__init__("lx_module") |
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def invoke(self, mod_name): |
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mod_name = mod_name.string() |
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module = find_module_by_name(mod_name) |
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if module: |
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return module.dereference() |
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else: |
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raise gdb.GdbError("Unable to find MODULE " + mod_name) |
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LxModule() |
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class LxLsmod(gdb.Command): |
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"""List currently loaded modules.""" |
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_module_use_type = utils.CachedType("struct module_use") |
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def __init__(self): |
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super(LxLsmod, self).__init__("lx-lsmod", gdb.COMMAND_DATA) |
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def invoke(self, arg, from_tty): |
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gdb.write( |
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"Address{0} Module Size Used by\n".format( |
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" " if utils.get_long_type().sizeof == 8 else "")) |
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for module in module_list(): |
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layout = module['core_layout'] |
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gdb.write("{address} {name:<19} {size:>8} {ref}".format( |
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address=str(layout['base']).split()[0], |
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name=module['name'].string(), |
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size=str(layout['size']), |
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ref=str(module['refcnt']['counter'] - 1))) |
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t = self._module_use_type.get_type().pointer() |
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first = True |
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sources = module['source_list'] |
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for use in lists.list_for_each_entry(sources, t, "source_list"): |
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gdb.write("{separator}{name}".format( |
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separator=" " if first else ",", |
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name=use['source']['name'].string())) |
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first = False |
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gdb.write("\n") |
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LxLsmod()
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