scripts/gdb: add module iteration class

Will soon be used for loading symbols, printing global variables or
listing modules.

Signed-off-by: Jan Kiszka <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Jason Wessel <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ben Widawsky <[email protected]>
Cc: Borislav Petkov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

1 files changed, 39 insertions, 0 deletions

diff --git a/scripts/gdb/linux/modules.py b/scripts/gdb/linux/modules.py
new file mode 100644
index 000000000000..8a65c3d5eecb
--- /dev/null
+++ b/scripts/gdb/linux/modules.py
@@ -0,0 +1,39 @@
+#
+# gdb helper commands and functions for Linux kernel debugging
+#
+#  module tools
+#
+# Copyright (c) Siemens AG, 2013
+#
+# Authors:
+#  Jan Kiszka <[email protected]>
+#
+# This work is licensed under the terms of the GNU GPL version 2.
+#
+
+import gdb
+
+from linux import utils
+
+
+module_type = utils.CachedType("struct module")
+
+
+class ModuleList:
+    def __init__(self):
+        global module_type
+        self.module_ptr_type = module_type.get_type().pointer()
+        modules = gdb.parse_and_eval("modules")
+        self.curr_entry = modules['next']
+        self.end_of_list = modules.address
+
+    def __iter__(self):
+        return self
+
+    def next(self):
+        entry = self.curr_entry
+        if entry != self.end_of_list:
+            self.curr_entry = entry['next']
+            return utils.container_of(entry, self.module_ptr_type, "list")
+        else:
+            raise StopIteration