obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 82 insertions, 0 deletions

diff --git a/gcc/ada/s-stache.ads b/gcc/ada/s-stache.ads
new file mode 100644
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--- /dev/null
+++ b/gcc/ada/s-stache.ads
@@ -0,0 +1,82 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
+--                                                                          --
+--                 S Y S T E M . S T A C K _ C H E C K I N G                --
+--                                                                          --
+--                                  S p e c                                 --
+--                                                                          --
+--           Copyright (C) 1999-2009, Free Software Foundation, Inc.        --
+--                                                                          --
+-- GNARL is free software; you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+-- GNARL was developed by the GNARL team at Florida State University.       --
+-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package provides a system-independent implementation of stack
+--  checking using comparison with stack base and limit.
+
+--  This package defines basic types and objects. Operations related to
+--  stack checking can be found in package System.Stack_Checking.Operations.
+
+pragma Compiler_Unit;
+
+with System.Storage_Elements;
+
+package System.Stack_Checking is
+   pragma Preelaborate;
+   pragma Elaborate_Body;
+   --  This unit has a junk null body. The reason is that historically we
+   --  used to have a real body, and it causes bootstrapping path problems
+   --  to eliminate it, since the old body may still be present in the
+   --  compilation environment for a build.
+
+   type Stack_Info is record
+      Limit : System.Address := System.Null_Address;
+      Base  : System.Address := System.Null_Address;
+      Size  : System.Storage_Elements.Storage_Offset := 0;
+   end record;
+   --  This record may be part of a larger data structure like the
+   --  task control block in the tasking case.
+   --  This specific layout has the advantage of being compatible with the
+   --  Intel x86 BOUNDS instruction.
+
+   type Stack_Access is access all Stack_Info;
+   --  Unique local storage associated with a specific task. This storage is
+   --  used for the stack base and limit, and is returned by Checked_Self.
+   --  Only self may write this information, it may be read by any task.
+   --  At no time the address range Limit .. Base (or Base .. Limit for
+   --  upgrowing stack) may contain any address that is part of another stack.
+   --  The Stack_Access may be part of a larger data structure.
+
+   Multi_Processor : constant Boolean := False; --  Not supported yet
+
+private
+
+   Null_Stack_Info  : aliased Stack_Info :=
+     (Limit => System.Null_Address,
+      Base  => System.Null_Address,
+      Size  => 0);
+   --  Use explicit assignment to avoid elaboration code (call to init proc)
+
+   Null_Stack : constant Stack_Access := Null_Stack_Info'Access;
+   --  Stack_Access value that will return a Stack_Base and Stack_Limit
+   --  that fail any stack check.
+
+end System.Stack_Checking;