Import from latest A23q source

Signed-off-by: rsuntk <rissu.ntk@gmail.com>

scripts/gdb/linux/modules.py

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