Add minimal GNAT run time system (RTS)

Add a stripped-down version of libgnat. This is somehow comparable to
libgcc but for Ada programs. It's licensed under GPLv3 but with the
runtime library exception. So it's totally fine to link it with our
GPLv2 code and keep it under GPLv2.

Change-Id: Ie6522abf093f0a516b9ae18ddc69131bd721dc0c
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/11836
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/src/lib/gnat/s-imenne.ads b/src/lib/gnat/s-imenne.ads
new file mode 100644
index 0000000000..3726720cd1
--- /dev/null
+++ b/src/lib/gnat/s-imenne.ads
@@ -0,0 +1,85 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                  S Y S T E M . I M G _ E N U M _ N E W                   --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2000-2013, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT 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/>.                                          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  Enumeration_Type'Image for all enumeration types except those in package
+--  Standard (where we have no opportunity to build image tables), and in
+--  package System (where it is too early to start building image tables).
+--  Special routines exist for the enumeration types in these packages.
+
+--  This is the new version of the package, for use by compilers built after
+--  Nov 21st, 2007, which provides procedures that avoid using the secondary
+--  stack. The original package System.Img_Enum is maintained in the sources
+--  for bootstrapping with older versions of the compiler which expect to find
+--  functions in this package.
+
+pragma Compiler_Unit_Warning;
+
+package System.Img_Enum_New is
+   pragma Pure;
+
+   procedure Image_Enumeration_8
+     (Pos     : Natural;
+      S       : in out String;
+      P       : out Natural;
+      Names   : String;
+      Indexes : System.Address);
+   --  Used to compute Enum'Image (Str) where Enum is some enumeration type
+   --  other than those defined in package Standard. Names is a string with
+   --  a lower bound of 1 containing the characters of all the enumeration
+   --  literals concatenated together in sequence. Indexes is the address of
+   --  an array of type array (0 .. N) of Natural_8, where N is the number of
+   --  enumeration literals in the type. The Indexes values are the starting
+   --  subscript of each enumeration literal, indexed by Pos values, with an
+   --  extra entry at the end containing Names'Length + 1. The reason that
+   --  Indexes is passed by address is that the actual type is created on the
+   --  fly by the expander. The desired 'Image value is stored in S (1 .. P)
+   --  and P is set on return. The caller guarantees that S is long enough to
+   --  hold the result and that the lower bound is 1.
+
+   procedure Image_Enumeration_16
+     (Pos     : Natural;
+      S       : in out String;
+      P       : out Natural;
+      Names   : String;
+      Indexes : System.Address);
+   --  Identical to Set_Image_Enumeration_8 except that it handles types using
+   --  array (0 .. Num) of Natural_16 for the Indexes table.
+
+   procedure Image_Enumeration_32
+     (Pos     : Natural;
+      S       : in out String;
+      P       : out Natural;
+      Names   : String;
+      Indexes : System.Address);
+   --  Identical to Set_Image_Enumeration_8 except that it handles types using
+   --  array (0 .. Num) of Natural_32 for the Indexes table.
+
+end System.Img_Enum_New;