1 files changed, 47 insertions, 0 deletions
diff --git a/gdb/lk-lists.c b/gdb/lk-lists.c
new file mode 100644
index 0000000000..55d11bd11d
--- /dev/null
+++ b/gdb/lk-lists.c
@@ -0,0 +1,47 @@
+/* Iterators for internal data structures of the Linux kernel.
+
+   Copyright (C) 2016 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+
+#include "inferior.h"
+#include "lk-lists.h"
+#include "lk-low.h"
+
+/* Returns next entry from struct list_head CURR while iterating field
+   SNAME->FNAME.  */
+
+CORE_ADDR
+lk_list_head_next (CORE_ADDR curr, const char *sname, const char *fname)
+{
+  CORE_ADDR next, next_prev;
+
+  /* We must always assume that the data we handle is corrupted.  Thus use
+     curr->next->prev == curr as sanity check.  */
+  next = lk_read_addr (curr + LK_OFFSET (list_head, next));
+  next_prev = lk_read_addr (next + LK_OFFSET (list_head, prev));
+
+  if (!curr || curr != next_prev)
+    {
+      error (_("Memory corruption detected while iterating list_head at "\
+	       "0x%s belonging to list %s->%s."),
+	     phex (curr, lk_builtin_type_size (unsigned_long)) , sname, fname);
+    }
+
+  return next;
+}