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, 129 insertions, 0 deletions

diff --git a/src/lib/gnat/s-imenne.adb b/src/lib/gnat/s-imenne.adb
new file mode 100644
index 0000000000..0c82dfd54d
--- /dev/null
+++ b/src/lib/gnat/s-imenne.adb
@@ -0,0 +1,129 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                  S Y S T E M . I M G _ E N U M _ N E W                   --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+pragma Compiler_Unit_Warning;
+pragma Assertion_Policy (Statement_Assertions => Ignore);
+
+with Ada.Unchecked_Conversion;
+
+package body System.Img_Enum_New is
+
+   -------------------------
+   -- Image_Enumeration_8 --
+   -------------------------
+
+   procedure Image_Enumeration_8
+     (Pos     : Natural;
+      S       : in out String;
+      P       : out Natural;
+      Names   : String;
+      Indexes : System.Address)
+   is
+      pragma Assert (S'First = 1);
+
+      type Natural_8 is range 0 .. 2 ** 7 - 1;
+      type Index_Table is array (Natural) of Natural_8;
+      type Index_Table_Ptr is access Index_Table;
+
+      function To_Index_Table_Ptr is
+        new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+      Start : constant Natural := Natural (IndexesT (Pos));
+      Next  : constant Natural := Natural (IndexesT (Pos + 1));
+
+   begin
+      S (1 .. Next - Start) := Names (Start .. Next - 1);
+      P := Next - Start;
+   end Image_Enumeration_8;
+
+   --------------------------
+   -- Image_Enumeration_16 --
+   --------------------------
+
+   procedure Image_Enumeration_16
+     (Pos     : Natural;
+      S       : in out String;
+      P       : out Natural;
+      Names   : String;
+      Indexes : System.Address)
+   is
+      pragma Assert (S'First = 1);
+
+      type Natural_16 is range 0 .. 2 ** 15 - 1;
+      type Index_Table is array (Natural) of Natural_16;
+      type Index_Table_Ptr is access Index_Table;
+
+      function To_Index_Table_Ptr is
+        new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+      Start : constant Natural := Natural (IndexesT (Pos));
+      Next  : constant Natural := Natural (IndexesT (Pos + 1));
+
+   begin
+      S (1 .. Next - Start) := Names (Start .. Next - 1);
+      P := Next - Start;
+   end Image_Enumeration_16;
+
+   --------------------------
+   -- Image_Enumeration_32 --
+   --------------------------
+
+   procedure Image_Enumeration_32
+     (Pos     : Natural;
+      S       : in out String;
+      P       : out Natural;
+      Names   : String;
+      Indexes : System.Address)
+   is
+      pragma Assert (S'First = 1);
+
+      type Natural_32 is range 0 .. 2 ** 31 - 1;
+      type Index_Table is array (Natural) of Natural_32;
+      type Index_Table_Ptr is access Index_Table;
+
+      function To_Index_Table_Ptr is
+        new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+      Start : constant Natural := Natural (IndexesT (Pos));
+      Next  : constant Natural := Natural (IndexesT (Pos + 1));
+
+   begin
+      S (1 .. Next - Start) := Names (Start .. Next - 1);
+      P := Next - Start;
+   end Image_Enumeration_32;
+
+end System.Img_Enum_New;