linux-kernel - [PATCH v7 04/21] scripts/gdb: Add module iteration class

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Message-Id: <78f0536d6b1114c6c1fec0f1bef594f2229f2e22.1384240478.git.jan.kiszka@siemens.com>
Date:	Tue, 12 Nov 2013 08:14:22 +0100
From:	Jan Kiszka <jan.kiszka@...mens.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Cc:	Jason Wessel <jason.wessel@...driver.com>,
	kgdb-bugreport@...ts.sourceforge.net,
	Andi Kleen <andi@...stfloor.org>,
	Tom Tromey <tromey@...hat.com>,
	Ben Widawsky <ben@...dawsk.net>, Borislav Petkov <bp@...e.de>,
	Tatiana Al-Chueyr Martins <tatiana.alchueyr@...il.com>
Subject: [PATCH v7 04/21] scripts/gdb: Add module iteration class

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

Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
---
 scripts/gdb/linux/modules.py | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 scripts/gdb/linux/modules.py

diff --git a/scripts/gdb/linux/modules.py b/scripts/gdb/linux/modules.py
new file mode 100644
index 0000000..8a65c3d
--- /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 <jan.kiszka@...mens.com>
+#
+# 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
-- 
1.8.1.1.298.ge7eed54

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