2 # gdb helper commands and functions for Linux kernel debugging
6 # Copyright (c) Siemens AG, 2013
11 # This work is licensed under the terms of the GNU GPL version 2.
16 from linux import cpus, utils
19 module_type = utils.CachedType("struct module")
24 module_ptr_type = module_type.get_type().pointer()
25 modules = gdb.parse_and_eval("modules")
26 entry = modules['next']
27 end_of_list = modules.address
29 while entry != end_of_list:
30 yield utils.container_of(entry, module_ptr_type, "list")
34 def find_module_by_name(name):
35 for module in module_list():
36 if module['name'].string() == name:
41 class LxModule(gdb.Function):
42 """Find module by name and return the module variable.
44 $lx_module("MODULE"): Given the name MODULE, iterate over all loaded modules
45 of the target and return that module variable which MODULE matches."""
48 super(LxModule, self).__init__("lx_module")
50 def invoke(self, mod_name):
51 mod_name = mod_name.string()
52 module = find_module_by_name(mod_name)
54 return module.dereference()
56 raise gdb.GdbError("Unable to find MODULE " + mod_name)
62 class LxLsmod(gdb.Command):
63 """List currently loaded modules."""
65 _module_use_type = utils.CachedType("struct module_use")
68 super(LxLsmod, self).__init__("lx-lsmod", gdb.COMMAND_DATA)
70 def invoke(self, arg, from_tty):
72 "Address{0} Module Size Used by\n".format(
73 " " if utils.get_long_type().sizeof == 8 else ""))
75 for module in module_list():
76 layout = module['core_layout']
77 gdb.write("{address} {name:<19} {size:>8} {ref}".format(
78 address=str(layout['base']).split()[0],
79 name=module['name'].string(),
80 size=str(layout['size']),
81 ref=str(module['refcnt']['counter'])))
83 source_list = module['source_list']
84 t = self._module_use_type.get_type().pointer()
85 entry = source_list['next']
87 while entry != source_list.address:
88 use = utils.container_of(entry, t, "source_list")
89 gdb.write("{separator}{name}".format(
90 separator=" " if first else ",",
91 name=use['source']['name'].string()))