Created linux.proc.Maps plugin.

Added object extensions for the key structures. Also added
constants.linux, which will contain Linux-specific constants
that can't be extracted via dwarf.

volatility/framework/objects/utility.py

@@ -1,9 +1,18 @@
-from volatility.framework.objects import Array
+from volatility.framework import objects
 
 
 def array_to_string(array, errors = 'replace'):
     """Takes a volatility Array of characters and returns a string"""
     # TODO: Consider checking the Array's target is a native char
-    if not isinstance(array, Array):
+    if not isinstance(array, objects.Array):
         raise TypeError("Array_to_string takes an Array of char")
     return array.cast("string", max_length = array.vol.count, errors = errors)
+
+def pointer_to_string(pointer, count, errors = 'replace'):
+    """Takes a volatility Pointer to characters and returns a string"""
+    if not isinstance(pointer, objects.Pointer):
+        raise TypeError("pointer_to_string takes a Pointer")
+    if count < 1:
+        raise ValueError("pointer_to_string requires a positive count")
+    char = pointer.dereference()
+    return char.cast("string", max_length = count, errors=errors)