Add pretty-printer for MPX bnd registers.

Boundary length is simpler implemented by means of a pretty
printer. This simplifies users life when examining a bound register.

Changelog:
2013-11-20  Walfred Tedeschi  <walfred.tedeschi@intel.com>

	* python/lib/gdb/command/bound_register.py: New file.
	* gdb/data-directory/Makefile.in: copy bond_register.py to the right path to
	be initialized at gdb startup.
testsuite/
	* gdb.python/py-pp-maint.exp: Consider new pretty-print added for registers.

Change-Id: Id4f39845e5ece56c370a1fd4343648909f08b731
Signed-off-by: Walfred Tedeschi <walfred.tedeschi@intel.com>

Conflicts:

	gdb/ChangeLog

gdb/python/lib/gdb/command/bound_registers.py

@@ -0,0 +1,45 @@
+# Pretty-printer utilities.
+# Copyright (C) 2013 Free Software Foundation, Inc.
+
+# 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/>.
+
+import gdb.printing
+
+class BoundPrinter:
+    """Adds size field to a _rawbound128 type."""
+
+    def __init__ (self, val):
+        self.val = val
+
+    def to_string (self):
+        upper = self.val["ubound"]
+        lower = self.val["lbound"]
+        size  = (long) ((upper) - (lower))
+        if size > -1:
+            size = size + 1
+        result = '{lbound = %s, ubound = %s} : size %s' % (lower, upper, size)
+        return result
+
+# There are two pattern matching used: first one is related to a library
+# second is related to the type. Since we are displaying a register all
+# libraries are accepted. Type to be processed is the same present
+# in the xml file.
+
+def build_pretty_printer ():
+    pp = gdb.printing.RegexpCollectionPrettyPrinter (".*")
+    pp.add_printer ('bound', '^__gdb_builtin_type_bound128', BoundPrinter)
+    return pp
+
+gdb.printing.register_pretty_printer (gdb.current_objfile (),
+                                      build_pretty_printer ())