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>

20 files changed, 2401 insertions, 0 deletions

diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index 355734ab17..dec608fa41 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -13,6 +13,7 @@
 # GNU General Public License for more details.
 #
 subdirs-y += loaders
+subdirs-y += gnat
 
 
 ifneq ($(CONFIG_BOOTBLOCK_CUSTOM),y)
diff --git a/src/lib/gnat/COPYING.RUNTIME b/src/lib/gnat/COPYING.RUNTIME
new file mode 100644
index 0000000000..e1b3c69c17
--- /dev/null
+++ b/src/lib/gnat/COPYING.RUNTIME
@@ -0,0 +1,73 @@
+GCC RUNTIME LIBRARY EXCEPTION
+
+Version 3.1, 31 March 2009
+
+Copyright (C) 2009 Free Software Foundation, Inc. <http://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+This GCC Runtime Library Exception ("Exception") is an additional
+permission under section 7 of the GNU General Public License, version
+3 ("GPLv3"). It applies to a given file (the "Runtime Library") that
+bears a notice placed by the copyright holder of the file stating that
+the file is governed by GPLv3 along with this Exception.
+
+When you use GCC to compile a program, GCC may combine portions of
+certain GCC header files and runtime libraries with the compiled
+program. The purpose of this Exception is to allow compilation of
+non-GPL (including proprietary) programs to use, in this way, the
+header files and runtime libraries covered by this Exception.
+
+0. Definitions.
+
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+Library for execution after a Compilation Process, or makes use of an
+interface provided by the Runtime Library, but is not otherwise based
+on the Runtime Library.
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diff --git a/src/lib/gnat/COPYING3 b/src/lib/gnat/COPYING3
new file mode 100644
index 0000000000..94a9ed024d
--- /dev/null
+++ b/src/lib/gnat/COPYING3
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
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+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    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/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
diff --git a/src/lib/gnat/Makefile.inc b/src/lib/gnat/Makefile.inc
new file mode 100644
index 0000000000..6ba274a7ef
--- /dev/null
+++ b/src/lib/gnat/Makefile.inc
@@ -0,0 +1,62 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2016 Nico Huber <nico.h@gmx.de>
+##
+## 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; version 2 of the License.
+##
+## 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.
+##
+
+define libgnat-template
+# $1 arch
+
+additional-dirs += $$(obj)/libgnat-$(1)/adainclude
+additional-dirs += $$(obj)/libgnat-$(1)/adalib
+
+ADAFLAGS_libgnat-$(1) := \
+	--RTS=$$(obj)/libgnat-$(1)/ \
+	-gnatg \
+	-gnatpg \
+	-I$$(src)/lib/gnat/ \
+
+libgnat-$(1)-y += a-unccon.ads
+libgnat-$(1)-y += ada.ads
+libgnat-$(1)-y += g-souinf.ads
+libgnat-$(1)-y += gnat.ads
+libgnat-$(1)-y += i-c.adb
+libgnat-$(1)-y += i-c.ads
+libgnat-$(1)-y += interfac.ads
+libgnat-$(1)-y += s-atacco.ads
+libgnat-$(1)-y += s-imenne.adb
+libgnat-$(1)-y += s-imenne.ads
+libgnat-$(1)-y += s-maccod.ads
+libgnat-$(1)-y += s-parame.ads
+libgnat-$(1)-y += s-stoele.adb
+libgnat-$(1)-y += s-stoele.ads
+libgnat-$(1)-y += s-unstyp.ads
+libgnat-$(1)-y += system.ads
+
+# Copy bodies too for inlining
+$$(obj)/libgnat-$(1)/libgnat.a: $$$$(libgnat-$(1)-objs)
+	cp $$(libgnat-$(1)-srcs) $$(libgnat-$(1)-extra-specs) \
+	   $$(obj)/libgnat-$(1)/adainclude/
+	cp $$(libgnat-$(1)-alis) \
+	   $$(obj)/libgnat-$(1)/adalib/
+	rm -f $$@
+	@printf "    AR         $$(subst $$(obj)/,,$$(@))\n"
+	$$(AR_libgnat-$(1)) cr $$@ $$^
+
+endef
+
+
+$(foreach arch,$(standard-archs), \
+	$(eval $(call define_class,libgnat-$(arch),$(arch))))
+
+$(foreach arch,$(standard-archs), \
+	$(eval $(call libgnat-template,$(arch))))
diff --git a/src/lib/gnat/a-unccon.ads b/src/lib/gnat/a-unccon.ads
new file mode 100644
index 0000000000..ffa84d9fad
--- /dev/null
+++ b/src/lib/gnat/a-unccon.ads
@@ -0,0 +1,23 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--              A D A . U N C H E C K E D _ C O N V E R S I O N             --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT.  In accordance with the copyright of that document, you can freely --
+-- copy and modify this specification,  provided that if you redistribute a --
+-- modified version,  any changes that you have made are clearly indicated. --
+--                                                                          --
+------------------------------------------------------------------------------
+
+generic
+   type Source (<>) is limited private;
+   type Target (<>) is limited private;
+
+function Ada.Unchecked_Conversion (S : Source) return Target;
+
+pragma Pure (Unchecked_Conversion);
+pragma Import (Intrinsic, Unchecked_Conversion);
diff --git a/src/lib/gnat/ada.ads b/src/lib/gnat/ada.ads
new file mode 100644
index 0000000000..8c860110f9
--- /dev/null
+++ b/src/lib/gnat/ada.ads
@@ -0,0 +1,19 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                                  A D A                                   --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT.  In accordance with the copyright of that document, you can freely --
+-- copy and modify this specification,  provided that if you redistribute a --
+-- modified version,  any changes that you have made are clearly indicated. --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package Ada is
+   pragma Pure;
+
+end Ada;
diff --git a/src/lib/gnat/g-souinf.ads b/src/lib/gnat/g-souinf.ads
new file mode 100644
index 0000000000..610db23371
--- /dev/null
+++ b/src/lib/gnat/g-souinf.ads
@@ -0,0 +1,92 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                     G N A T . S O U R C E _ I N F O                      --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2000-2014, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package provides some useful utility subprograms that provide access
+--  to source code information known at compile time. These subprograms are
+--  intrinsic operations that provide information known to the compiler in
+--  a form that can be embedded into the source program for identification
+--  and logging purposes. For example, an exception handler can print out
+--  the name of the source file in which the exception is handled.
+
+package GNAT.Source_Info is
+   pragma Preelaborate;
+   --  Note that this unit is Preelaborate, but not Pure, that's because the
+   --  functions here such as Line are clearly not pure functions, and normally
+   --  we mark intrinsic functions in a Pure unit as Pure, even though they are
+   --  imported.
+   --
+   --  Historical note: this used to be Pure, but that was when we marked all
+   --  intrinsics as not Pure, even in Pure units, so no problems arose.
+
+   function File return String with
+     Import, Convention => Intrinsic;
+   --  Return the name of the current file, not including the path information.
+   --  The result is considered to be a static string constant.
+
+   function Line return Positive with
+     Import, Convention => Intrinsic;
+   --  Return the current input line number. The result is considered to be a
+   --  static expression.
+
+   function Source_Location return String with
+     Import, Convention => Intrinsic;
+   --  Return a string literal of the form "name:line", where name is the
+   --  current source file name without path information, and line is the
+   --  current line number. In the event that instantiations are involved,
+   --  additional suffixes of the same form are appended after the separating
+   --  string " instantiated at ". The result is considered to be a static
+   --  string constant.
+
+   function Enclosing_Entity return String with
+     Import, Convention => Intrinsic;
+   --  Return the name of the current subprogram, package, task, entry or
+   --  protected subprogram. The string is in exactly the form used for the
+   --  declaration of the entity (casing and encoding conventions), and is
+   --  considered to be a static string constant. The name is fully qualified
+   --  using periods where possible (this is not always possible, notably in
+   --  the case of entities appearing in unnamed block statements.)
+   --
+   --  Note: if this function is used at the outer level of a generic package,
+   --  the string returned will be the name of the instance, not the generic
+   --  package itself. This is useful in identifying and logging information
+   --  from within generic templates.
+
+   function Compilation_Date return String with
+     Import, Convention => Intrinsic;
+   --  Returns date of compilation as a static string "mmm dd yyyy". This is
+   --  in local time form, and is exactly compatible with C macro __DATE__.
+
+   function Compilation_Time return String with
+     Import, Convention => Intrinsic;
+   --  Returns GMT time of compilation as a static string "hh:mm:ss". This is
+   --  in local time form, and is exactly compatible with C macro __TIME__.
+
+end GNAT.Source_Info;
diff --git a/src/lib/gnat/gnat.ads b/src/lib/gnat/gnat.ads
new file mode 100644
index 0000000000..a0807b656f
--- /dev/null
+++ b/src/lib/gnat/gnat.ads
@@ -0,0 +1,37 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                                 G N A T                                  --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                     Copyright (C) 1992-2014, AdaCore                     --
+--                                                                          --
+-- 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This is the parent package for a library of useful units provided with GNAT
+
+package GNAT is
+   pragma Pure;
+
+end GNAT;
diff --git a/src/lib/gnat/i-c.adb b/src/lib/gnat/i-c.adb
new file mode 100644
index 0000000000..6926a9eacf
--- /dev/null
+++ b/src/lib/gnat/i-c.adb
@@ -0,0 +1,73 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                         I N T E R F A C E S . C                          --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          Copyright (C) 1992-2009, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package body Interfaces.C is
+
+   -----------------------
+   -- Is_Nul_Terminated --
+   -----------------------
+
+   --  Case of char_array
+
+   function Is_Nul_Terminated (Item : char_array) return Boolean is
+   begin
+      for J in Item'Range loop
+         if Item (J) = nul then
+            return True;
+         end if;
+      end loop;
+
+      return False;
+   end Is_Nul_Terminated;
+
+   ------------
+   -- To_Ada --
+   ------------
+
+   --  Convert char to Character
+
+   function To_Ada (Item : char) return Character is
+   begin
+      return Character'Val (char'Pos (Item));
+   end To_Ada;
+
+   ----------
+   -- To_C --
+   ----------
+
+   --  Convert Character to char
+
+   function To_C (Item : Character) return char is
+   begin
+      return char'Val (Character'Pos (Item));
+   end To_C;
+
+end Interfaces.C;
diff --git a/src/lib/gnat/i-c.ads b/src/lib/gnat/i-c.ads
new file mode 100644
index 0000000000..1403fcec80
--- /dev/null
+++ b/src/lib/gnat/i-c.ads
@@ -0,0 +1,78 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                         I N T E R F A C E S . C                          --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT.  In accordance with the copyright of that document, you can freely --
+-- copy and modify this specification,  provided that if you redistribute a --
+-- modified version,  any changes that you have made are clearly indicated. --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with System.Parameters;
+
+package Interfaces.C is
+   pragma Pure;
+
+   --  Declaration's based on C's <limits.h>
+
+   CHAR_BIT  : constant := 8;
+   SCHAR_MIN : constant := -128;
+   SCHAR_MAX : constant := 127;
+   UCHAR_MAX : constant := 255;
+
+   --  Signed and Unsigned Integers. Note that in GNAT, we have ensured that
+   --  the standard predefined Ada types correspond to the standard C types
+
+   --  Note: the Integer qualifications used in the declaration of type long
+   --  avoid ambiguities when compiling in the presence of s-auxdec.ads and
+   --  a non-private system.address type.
+
+   type int   is new Integer;
+   type short is new Short_Integer;
+   type long  is range -(2 ** (System.Parameters.long_bits - Integer'(1)))
+     .. +(2 ** (System.Parameters.long_bits - Integer'(1))) - 1;
+
+   type signed_char is range SCHAR_MIN .. SCHAR_MAX;
+   for signed_char'Size use CHAR_BIT;
+
+   type unsigned       is mod 2 ** int'Size;
+   type unsigned_short is mod 2 ** short'Size;
+   type unsigned_long  is mod 2 ** long'Size;
+
+   type unsigned_char is mod (UCHAR_MAX + 1);
+   for unsigned_char'Size use CHAR_BIT;
+
+   subtype plain_char is unsigned_char; -- ??? should be parameterized
+
+   --  Note: the Integer qualifications used in the declaration of ptrdiff_t
+   --  avoid ambiguities when compiling in the presence of s-auxdec.ads and
+   --  a non-private system.address type.
+
+   type ptrdiff_t is
+     range -(2 ** (System.Parameters.ptr_bits - Integer'(1))) ..
+           +(2 ** (System.Parameters.ptr_bits - Integer'(1)) - 1);
+
+   type size_t is mod 2 ** System.Parameters.ptr_bits;
+
+   ----------------------------
+   -- Characters and Strings --
+   ----------------------------
+
+   type char is new Character;
+
+   nul : constant char := char'First;
+
+   function To_C   (Item : Character) return char;
+   function To_Ada (Item : char)      return Character;
+
+   type char_array is array (size_t range <>) of aliased char;
+   for char_array'Component_Size use CHAR_BIT;
+
+   function Is_Nul_Terminated (Item : char_array) return Boolean;
+
+end Interfaces.C;
diff --git a/src/lib/gnat/interfac.ads b/src/lib/gnat/interfac.ads
new file mode 100644
index 0000000000..e7e196c594
--- /dev/null
+++ b/src/lib/gnat/interfac.ads
@@ -0,0 +1,161 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                           I N T E R F A C E S                            --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2002-2014, Free Software Foundation, Inc.         --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the implementation dependent sections of this file.      --
+--                                                                          --
+-- 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;
+
+package Interfaces is
+   pragma Pure;
+
+   --  All identifiers in this unit are implementation defined
+
+   pragma Implementation_Defined;
+
+   type Integer_8  is range -2 **  7 .. 2 **  7 - 1;
+   for Integer_8'Size use  8;
+
+   type Integer_16 is range -2 ** 15 .. 2 ** 15 - 1;
+   for Integer_16'Size use 16;
+
+   type Integer_32 is range -2 ** 31 .. 2 ** 31 - 1;
+   for Integer_32'Size use 32;
+
+   type Integer_64 is new Long_Long_Integer;
+   for Integer_64'Size use 64;
+   --  Note: we use Long_Long_Integer'First instead of -2 ** 63 to allow this
+   --  unit to compile when using custom target configuration files where the
+   --  maximum integer is 32 bits. This is useful for static analysis tools
+   --  such as SPARK or CodePeer. In the normal case Long_Long_Integer is
+   --  always 64-bits so we get the desired 64-bit type.
+
+   type Unsigned_8  is mod 2 ** 8;
+   for Unsigned_8'Size use  8;
+
+   type Unsigned_16 is mod 2 ** 16;
+   for Unsigned_16'Size use 16;
+
+   type Unsigned_32 is mod 2 ** 32;
+   for Unsigned_32'Size use 32;
+
+   type Unsigned_64 is mod 2 ** Long_Long_Integer'Size;
+   for Unsigned_64'Size use 64;
+   --  See comment on Integer_64 above
+
+   function Shift_Left
+     (Value  : Unsigned_8;
+      Amount : Natural) return Unsigned_8;
+
+   function Shift_Right
+     (Value  : Unsigned_8;
+      Amount : Natural) return Unsigned_8;
+
+   function Shift_Right_Arithmetic
+     (Value  : Unsigned_8;
+      Amount : Natural) return Unsigned_8;
+
+   function Rotate_Left
+     (Value  : Unsigned_8;
+      Amount : Natural) return Unsigned_8;
+
+   function Rotate_Right
+     (Value  : Unsigned_8;
+      Amount : Natural) return Unsigned_8;
+
+   function Shift_Left
+     (Value  : Unsigned_16;
+      Amount : Natural) return Unsigned_16;
+
+   function Shift_Right
+     (Value  : Unsigned_16;
+      Amount : Natural) return Unsigned_16;
+
+   function Shift_Right_Arithmetic
+     (Value  : Unsigned_16;
+      Amount : Natural) return Unsigned_16;
+
+   function Rotate_Left
+     (Value  : Unsigned_16;
+      Amount : Natural) return Unsigned_16;
+
+   function Rotate_Right
+     (Value  : Unsigned_16;
+      Amount : Natural) return Unsigned_16;
+
+   function Shift_Left
+     (Value  : Unsigned_32;
+      Amount : Natural) return Unsigned_32;
+
+   function Shift_Right
+     (Value  : Unsigned_32;
+      Amount : Natural) return Unsigned_32;
+
+   function Shift_Right_Arithmetic
+     (Value  : Unsigned_32;
+      Amount : Natural) return Unsigned_32;
+
+   function Rotate_Left
+     (Value  : Unsigned_32;
+      Amount : Natural) return Unsigned_32;
+
+   function Rotate_Right
+     (Value  : Unsigned_32;
+      Amount : Natural) return Unsigned_32;
+
+   function Shift_Left
+     (Value  : Unsigned_64;
+      Amount : Natural) return Unsigned_64;
+
+   function Shift_Right
+     (Value  : Unsigned_64;
+      Amount : Natural) return Unsigned_64;
+
+   function Shift_Right_Arithmetic
+     (Value  : Unsigned_64;
+      Amount : Natural) return Unsigned_64;
+
+   function Rotate_Left
+     (Value  : Unsigned_64;
+      Amount : Natural) return Unsigned_64;
+
+   function Rotate_Right
+     (Value  : Unsigned_64;
+      Amount : Natural) return Unsigned_64;
+
+   pragma Import (Intrinsic, Shift_Left);
+   pragma Import (Intrinsic, Shift_Right);
+   pragma Import (Intrinsic, Shift_Right_Arithmetic);
+   pragma Import (Intrinsic, Rotate_Left);
+   pragma Import (Intrinsic, Rotate_Right);
+
+end Interfaces;
diff --git a/src/lib/gnat/s-atacco.ads b/src/lib/gnat/s-atacco.ads
new file mode 100644
index 0000000000..fb6232d14a
--- /dev/null
+++ b/src/lib/gnat/s-atacco.ads
@@ -0,0 +1,63 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+-- S Y S T E M . A D D R E S S _ T O _ A C C E S S _ C O N V E R S I O N S  --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2012, Free Software Foundation, Inc.         --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the  contents of the part following the private keyword. --
+--                                                                          --
+-- 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+generic
+   type Object (<>) is limited private;
+
+package System.Address_To_Access_Conversions is
+   pragma Preelaborate;
+
+   pragma Compile_Time_Warning
+     (Object'Unconstrained_Array,
+      "Object is unconstrained array type" & ASCII.LF &
+      "To_Pointer results may not have bounds");
+
+   type Object_Pointer is access all Object;
+   for Object_Pointer'Size use Standard'Address_Size;
+
+   pragma No_Strict_Aliasing (Object_Pointer);
+   --  Strictly speaking, this routine should not be used to generate pointers
+   --  to other than proper values of the proper type, but in practice, this
+   --  is done all the time. This pragma stops the compiler from doing some
+   --  optimizations that may cause unexpected results based on the assumption
+   --  of no strict aliasing.
+
+   function To_Pointer (Value : Address)        return Object_Pointer;
+   function To_Address (Value : Object_Pointer) return Address;
+
+   pragma Import (Intrinsic, To_Pointer);
+   pragma Import (Intrinsic, To_Address);
+
+end System.Address_To_Access_Conversions;
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;
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;
diff --git a/src/lib/gnat/s-maccod.ads b/src/lib/gnat/s-maccod.ads
new file mode 100644
index 0000000000..a95e319cb9
--- /dev/null
+++ b/src/lib/gnat/s-maccod.ads
@@ -0,0 +1,130 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                   S Y S T E M . M A C H I N E _ C O D E                  --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2011, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package provides machine code support, both for intrinsic machine
+--  operations, and also for machine code statements. See GNAT documentation
+--  for full details.
+
+package System.Machine_Code is
+   pragma Pure;
+
+   --  All identifiers in this unit are implementation defined
+
+   pragma Implementation_Defined;
+
+   type Asm_Input_Operand  is private;
+   type Asm_Output_Operand is private;
+   --  These types are never used directly, they are declared only so that
+   --  the calls to Asm are type correct according to Ada semantic rules.
+
+   No_Input_Operands  : constant Asm_Input_Operand;
+   No_Output_Operands : constant Asm_Output_Operand;
+
+   type Asm_Input_Operand_List  is
+     array (Integer range <>) of Asm_Input_Operand;
+
+   type Asm_Output_Operand_List is
+     array (Integer range <>) of Asm_Output_Operand;
+
+   type Asm_Insn is private;
+   --  This type is not used directly. It is declared only so that the
+   --  aggregates used in code statements are type correct by Ada rules.
+
+   procedure Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand_List;
+     Inputs   : Asm_Input_Operand_List;
+     Clobber  : String  := "";
+     Volatile : Boolean := False);
+
+   procedure Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand := No_Output_Operands;
+     Inputs   : Asm_Input_Operand_List;
+     Clobber  : String  := "";
+     Volatile : Boolean := False);
+
+   procedure Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand_List;
+     Inputs   : Asm_Input_Operand := No_Input_Operands;
+     Clobber  : String  := "";
+     Volatile : Boolean := False);
+
+   procedure Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand := No_Output_Operands;
+     Inputs   : Asm_Input_Operand  := No_Input_Operands;
+     Clobber  : String  := "";
+     Volatile : Boolean := False);
+
+   function Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand_List;
+     Inputs   : Asm_Input_Operand_List;
+     Clobber  : String  := "";
+     Volatile : Boolean := False) return Asm_Insn;
+
+   function Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand := No_Output_Operands;
+     Inputs   : Asm_Input_Operand_List;
+     Clobber  : String  := "";
+     Volatile : Boolean := False) return Asm_Insn;
+
+   function Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand_List;
+     Inputs   : Asm_Input_Operand := No_Input_Operands;
+     Clobber  : String  := "";
+     Volatile : Boolean := False) return Asm_Insn;
+
+   function Asm (
+     Template : String;
+     Outputs  : Asm_Output_Operand := No_Output_Operands;
+     Inputs   : Asm_Input_Operand  := No_Input_Operands;
+     Clobber  : String  := "";
+     Volatile : Boolean := False) return Asm_Insn;
+
+   pragma Import (Intrinsic, Asm);
+
+private
+
+   type Asm_Input_Operand  is new Integer;
+   type Asm_Output_Operand is new Integer;
+   type Asm_Insn           is new Integer;
+   --  All three of these types are dummy types, to meet the requirements of
+   --  type consistency. No values of these types are ever referenced.
+
+   No_Input_Operands  : constant Asm_Input_Operand  := 0;
+   No_Output_Operands : constant Asm_Output_Operand := 0;
+
+end System.Machine_Code;
diff --git a/src/lib/gnat/s-parame.ads b/src/lib/gnat/s-parame.ads
new file mode 100644
index 0000000000..3bb8b106da
--- /dev/null
+++ b/src/lib/gnat/s-parame.ads
@@ -0,0 +1,66 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                    S Y S T E M . P A R A M E T E R S                     --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2014, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  Default version used when no target-specific version is provided
+
+--  This package defines some system dependent parameters for GNAT. These
+--  are values that are referenced by the runtime library and are therefore
+--  relevant to the target machine.
+
+--  The parameters whose value is defined in the spec are not generally
+--  expected to be changed. If they are changed, it will be necessary to
+--  recompile the run-time library.
+
+--  The parameters which are defined by functions can be changed by modifying
+--  the body of System.Parameters in file s-parame.adb. A change to this body
+--  requires only rebinding and relinking of the application.
+
+--  Note: do not introduce any pragma Inline statements into this unit, since
+--  otherwise the relinking and rebinding capability would be deactivated.
+
+pragma Compiler_Unit_Warning;
+
+package System.Parameters is
+   pragma Pure;
+
+   ----------------------------------------------
+   -- Characteristics of types in Interfaces.C --
+   ----------------------------------------------
+
+   long_bits : constant := Long_Integer'Size;
+   --  Number of bits in type long and unsigned_long. The normal convention
+   --  is that this is the same as type Long_Integer, but this may not be true
+   --  of all targets.
+
+   ptr_bits  : constant := Standard'Address_Size;
+   --  Number of bits in Interfaces.C pointers, normally a standard address
+
+end System.Parameters;
diff --git a/src/lib/gnat/s-stoele.adb b/src/lib/gnat/s-stoele.adb
new file mode 100644
index 0000000000..1cb5f92a23
--- /dev/null
+++ b/src/lib/gnat/s-stoele.adb
@@ -0,0 +1,131 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--               S Y S T E M . S T O R A G E _ E L E M E N T S              --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          Copyright (C) 1992-2014, 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;
+
+with Ada.Unchecked_Conversion;
+
+package body System.Storage_Elements is
+
+   pragma Suppress (All_Checks);
+
+   --  Conversion to/from address
+
+   --  Note qualification below of To_Address to avoid ambiguities systems
+   --  where Address is a visible integer type.
+
+   function To_Address is
+     new Ada.Unchecked_Conversion (Storage_Offset, Address);
+   function To_Offset  is
+     new Ada.Unchecked_Conversion (Address, Storage_Offset);
+
+   --  Conversion to/from integers
+
+   --  These functions must be place first because they are inlined_always
+   --  and are used and inlined in other subprograms defined in this unit.
+
+   ----------------
+   -- To_Address --
+   ----------------
+
+   function To_Address (Value : Integer_Address) return Address is
+   begin
+      return Address (Value);
+   end To_Address;
+
+   ----------------
+   -- To_Integer --
+   ----------------
+
+   function To_Integer (Value : Address) return Integer_Address is
+   begin
+      return Integer_Address (Value);
+   end To_Integer;
+
+   --  Address arithmetic
+
+   ---------
+   -- "+" --
+   ---------
+
+   function "+" (Left : Address; Right : Storage_Offset) return Address is
+   begin
+      return Storage_Elements.To_Address
+        (To_Integer (Left) + To_Integer (To_Address (Right)));
+   end "+";
+
+   function "+" (Left : Storage_Offset; Right : Address) return Address is
+   begin
+      return Storage_Elements.To_Address
+        (To_Integer (To_Address (Left)) + To_Integer (Right));
+   end "+";
+
+   ---------
+   -- "-" --
+   ---------
+
+   function "-" (Left : Address; Right : Storage_Offset) return Address is
+   begin
+      return Storage_Elements.To_Address
+        (To_Integer (Left) - To_Integer (To_Address (Right)));
+   end "-";
+
+   function "-" (Left, Right : Address) return Storage_Offset is
+   begin
+      return To_Offset (Storage_Elements.To_Address
+                         (To_Integer (Left) - To_Integer (Right)));
+   end "-";
+
+   -----------
+   -- "mod" --
+   -----------
+
+   function "mod"
+     (Left  : Address;
+      Right : Storage_Offset) return Storage_Offset
+   is
+   begin
+      if Right > 0 then
+         return Storage_Offset
+           (To_Integer (Left) mod Integer_Address (Right));
+
+         --  The negative case makes no sense since it is a case of a mod where
+         --  the left argument is unsigned and the right argument is signed. In
+         --  accordance with the (spirit of the) permission of RM 13.7.1(16),
+         --  we raise CE, and also include the zero case here. Yes, the RM says
+         --  PE, but this really is so obviously more like a constraint error.
+
+      else
+         raise Constraint_Error;
+      end if;
+   end "mod";
+
+end System.Storage_Elements;
diff --git a/src/lib/gnat/s-stoele.ads b/src/lib/gnat/s-stoele.ads
new file mode 100644
index 0000000000..bf773cb03d
--- /dev/null
+++ b/src/lib/gnat/s-stoele.ads
@@ -0,0 +1,117 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--               S Y S T E M . S T O R A G E _ E L E M E N T S              --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 2002-2013, Free Software Foundation, Inc.         --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the implementation dependent sections of this file.      --
+--                                                                          --
+-- 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  Warning: declarations in this package are ambiguous with respect to the
+--  extra declarations that can be introduced into System using Extend_System.
+--  It is a good idea to avoid use clauses for this package.
+
+pragma Compiler_Unit_Warning;
+
+package System.Storage_Elements is
+   pragma Pure;
+   --  Note that we take advantage of the implementation permission to make
+   --  this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada 2005,
+   --  this is Pure in any case (AI-362).
+
+   --  We also add the pragma Pure_Function to the operations in this package,
+   --  because otherwise functions with parameters derived from Address are
+   --  treated as non-pure by the back-end (see exp_ch6.adb). This is because
+   --  in many cases such a parameter is used to hide read/out access to
+   --  objects, and it would be unsafe to treat such functions as pure.
+
+   type Storage_Offset is range
+     -(2 ** (Integer'(Standard'Address_Size) - 1)) ..
+     +(2 ** (Integer'(Standard'Address_Size) - 1)) - Long_Long_Integer'(1);
+   --  Note: the reason for the Long_Long_Integer qualification here is to
+   --  avoid a bogus ambiguity when this unit is analyzed in an rtsfind
+   --  context. It may be possible to remove this in the future, but it is
+   --  certainly harmless in any case ???
+
+   subtype Storage_Count is Storage_Offset range 0 .. Storage_Offset'Last;
+
+   type Storage_Element is mod 2 ** Storage_Unit;
+   for Storage_Element'Size use Storage_Unit;
+
+   pragma Universal_Aliasing (Storage_Element);
+   --  This type is used by the expander to implement aggregate copy
+
+   type Storage_Array is
+     array (Storage_Offset range <>) of aliased Storage_Element;
+   for Storage_Array'Component_Size use Storage_Unit;
+
+   --  Address arithmetic
+
+   function "+" (Left : Address; Right : Storage_Offset) return Address;
+   pragma Convention (Intrinsic, "+");
+   pragma Inline_Always ("+");
+   pragma Pure_Function ("+");
+
+   function "+" (Left : Storage_Offset; Right : Address) return Address;
+   pragma Convention (Intrinsic, "+");
+   pragma Inline_Always ("+");
+   pragma Pure_Function ("+");
+
+   function "-" (Left : Address; Right : Storage_Offset) return Address;
+   pragma Convention (Intrinsic, "-");
+   pragma Inline_Always ("-");
+   pragma Pure_Function ("-");
+
+   function "-" (Left, Right : Address) return Storage_Offset;
+   pragma Convention (Intrinsic, "-");
+   pragma Inline_Always ("-");
+   pragma Pure_Function ("-");
+
+   function "mod"
+     (Left  : Address;
+      Right : Storage_Offset) return  Storage_Offset;
+   pragma Convention (Intrinsic, "mod");
+   pragma Inline_Always ("mod");
+   pragma Pure_Function ("mod");
+
+   --  Conversion to/from integers
+
+   type Integer_Address is mod Memory_Size;
+
+   function To_Address (Value : Integer_Address) return Address;
+   pragma Convention (Intrinsic, To_Address);
+   pragma Inline_Always (To_Address);
+   pragma Pure_Function (To_Address);
+
+   function To_Integer (Value : Address) return Integer_Address;
+   pragma Convention (Intrinsic, To_Integer);
+   pragma Inline_Always (To_Integer);
+   pragma Pure_Function (To_Integer);
+
+end System.Storage_Elements;
diff --git a/src/lib/gnat/s-unstyp.ads b/src/lib/gnat/s-unstyp.ads
new file mode 100644
index 0000000000..9eefc15b59
--- /dev/null
+++ b/src/lib/gnat/s-unstyp.ads
@@ -0,0 +1,211 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                          GNAT RUN-TIME COMPONENTS                        --
+--                                                                          --
+--                S Y S T E M . U N S I G N E D _ T Y P E S                 --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2014, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package contains definitions of standard unsigned types that
+--  correspond in size to the standard signed types declared in Standard,
+--  and (unlike the types in Interfaces) have corresponding names. It
+--  also contains some related definitions for other specialized types
+--  used by the compiler in connection with packed array types.
+
+pragma Compiler_Unit_Warning;
+
+package System.Unsigned_Types is
+   pragma Pure;
+
+   type Short_Short_Unsigned is mod 2 ** Short_Short_Integer'Size;
+   type Short_Unsigned       is mod 2 ** Short_Integer'Size;
+   type Unsigned             is mod 2 ** Integer'Size;
+   type Long_Unsigned        is mod 2 ** Long_Integer'Size;
+   type Long_Long_Unsigned   is mod 2 ** Long_Long_Integer'Size;
+
+   type Float_Unsigned       is mod 2 ** Float'Size;
+   --  Used in the implementation of Is_Negative intrinsic (see Exp_Intr)
+
+   type Packed_Byte is mod 2 ** 8;
+   pragma Universal_Aliasing (Packed_Byte);
+   for Packed_Byte'Size use 8;
+   --  Component type for Packed_Bytes1, Packed_Bytes2 and Packed_Byte4 arrays.
+   --  As this type is used by the compiler to implement operations on user
+   --  packed array, it needs to be able to alias any type.
+
+   type Packed_Bytes1 is array (Natural range <>) of aliased Packed_Byte;
+   for Packed_Bytes1'Alignment use 1;
+   for Packed_Bytes1'Component_Size use Packed_Byte'Size;
+   --  This is the type used to implement packed arrays where no alignment
+   --  is required. This includes the cases of 1,2,4 (where we use direct
+   --  masking operations), and all odd component sizes (where the clusters
+   --  are not aligned anyway, see, e.g. System.Pack_07 in file s-pack07
+   --  for details.
+
+   type Packed_Bytes2 is new Packed_Bytes1;
+   for Packed_Bytes2'Alignment use Integer'Min (2, Standard'Maximum_Alignment);
+   --  This is the type used to implement packed arrays where an alignment
+   --  of 2 (is possible) is helpful for maximum efficiency of the get and
+   --  set routines in the corresponding library unit. This is true of all
+   --  component sizes that are even but not divisible by 4 (other than 2 for
+   --  which we use direct masking operations). In such cases, the clusters
+   --  can be assumed to be 2-byte aligned if the array is aligned. See for
+   --  example System.Pack_10 in file s-pack10).
+
+   type Packed_Bytes4 is new Packed_Bytes1;
+   for Packed_Bytes4'Alignment use Integer'Min (4, Standard'Maximum_Alignment);
+   --  This is the type used to implement packed arrays where an alignment
+   --  of 4 (if possible) is helpful for maximum efficiency of the get and
+   --  set routines in the corresponding library unit. This is true of all
+   --  component sizes that are divisible by 4 (other than powers of 2, which
+   --  are either handled by direct masking or not packed at all). In such
+   --  cases the clusters can be assumed to be 4-byte aligned if the array
+   --  is aligned (see System.Pack_12 in file s-pack12 as an example).
+
+   type Bits_1 is mod 2**1;
+   type Bits_2 is mod 2**2;
+   type Bits_4 is mod 2**4;
+   --  Types used for packed array conversions
+
+   subtype Bytes_F is Packed_Bytes4 (1 .. Float'Size / 8);
+   --  Type used in implementation of Is_Negative intrinsic (see Exp_Intr)
+
+   function Shift_Left
+     (Value  : Short_Short_Unsigned;
+      Amount : Natural) return Short_Short_Unsigned;
+
+   function Shift_Right
+     (Value  : Short_Short_Unsigned;
+      Amount : Natural) return Short_Short_Unsigned;
+
+   function Shift_Right_Arithmetic
+     (Value  : Short_Short_Unsigned;
+      Amount : Natural) return Short_Short_Unsigned;
+
+   function Rotate_Left
+     (Value  : Short_Short_Unsigned;
+      Amount : Natural) return Short_Short_Unsigned;
+
+   function Rotate_Right
+     (Value  : Short_Short_Unsigned;
+      Amount : Natural) return Short_Short_Unsigned;
+
+   function Shift_Left
+     (Value  : Short_Unsigned;
+      Amount : Natural) return Short_Unsigned;
+
+   function Shift_Right
+     (Value  : Short_Unsigned;
+      Amount : Natural) return Short_Unsigned;
+
+   function Shift_Right_Arithmetic
+     (Value  : Short_Unsigned;
+      Amount : Natural) return Short_Unsigned;
+
+   function Rotate_Left
+     (Value  : Short_Unsigned;
+      Amount : Natural) return Short_Unsigned;
+
+   function Rotate_Right
+     (Value  : Short_Unsigned;
+      Amount : Natural) return Short_Unsigned;
+
+   function Shift_Left
+     (Value  : Unsigned;
+      Amount : Natural) return Unsigned;
+
+   function Shift_Right
+     (Value  : Unsigned;
+      Amount : Natural) return Unsigned;
+
+   function Shift_Right_Arithmetic
+     (Value  : Unsigned;
+      Amount : Natural) return Unsigned;
+
+   function Rotate_Left
+     (Value  : Unsigned;
+      Amount : Natural) return Unsigned;
+
+   function Rotate_Right
+     (Value  : Unsigned;
+      Amount : Natural) return Unsigned;
+
+   function Shift_Left
+     (Value  : Long_Unsigned;
+      Amount : Natural) return Long_Unsigned;
+
+   function Shift_Right
+     (Value  : Long_Unsigned;
+      Amount : Natural) return Long_Unsigned;
+
+   function Shift_Right_Arithmetic
+     (Value  : Long_Unsigned;
+      Amount : Natural) return Long_Unsigned;
+
+   function Rotate_Left
+     (Value  : Long_Unsigned;
+      Amount : Natural) return Long_Unsigned;
+
+   function Rotate_Right
+     (Value  : Long_Unsigned;
+      Amount : Natural) return Long_Unsigned;
+
+   function Shift_Left
+     (Value  : Long_Long_Unsigned;
+      Amount : Natural) return Long_Long_Unsigned;
+
+   function Shift_Right
+     (Value  : Long_Long_Unsigned;
+      Amount : Natural) return Long_Long_Unsigned;
+
+   function Shift_Right_Arithmetic
+     (Value  : Long_Long_Unsigned;
+      Amount : Natural) return Long_Long_Unsigned;
+
+   function Rotate_Left
+     (Value  : Long_Long_Unsigned;
+      Amount : Natural) return Long_Long_Unsigned;
+
+   function Rotate_Right
+     (Value  : Long_Long_Unsigned;
+      Amount : Natural) return Long_Long_Unsigned;
+
+   pragma Import (Intrinsic, Shift_Left);
+   pragma Import (Intrinsic, Shift_Right);
+   pragma Import (Intrinsic, Shift_Right_Arithmetic);
+   pragma Import (Intrinsic, Rotate_Left);
+   pragma Import (Intrinsic, Rotate_Right);
+
+   --  The following definitions are obsolescent. They were needed by the
+   --  previous version of the compiler and runtime, but are not needed
+   --  by the current version. We retain them to help with bootstrap path
+   --  problems. Also they seem harmless, and if any user programs have
+   --  been using these types, why discombobulate them?
+
+   subtype Packed_Bytes           is Packed_Bytes4;
+   subtype Packed_Bytes_Unaligned is Packed_Bytes1;
+
+end System.Unsigned_Types;
diff --git a/src/lib/gnat/system.ads b/src/lib/gnat/system.ads
new file mode 100644
index 0000000000..aed5592f73
--- /dev/null
+++ b/src/lib/gnat/system.ads
@@ -0,0 +1,176 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                        GNAT RUN-TIME COMPONENTS                          --
+--                                                                          --
+--                               S Y S T E M                                --
+--                                                                          --
+--                                 S p e c                                  --
+--                              (LSH Version)                               --
+--                                                                          --
+--          Copyright (C) 1992-2014, Free Software Foundation, Inc.         --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the  contents of the part following the private keyword. --
+--                                                                          --
+-- 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 Restrictions (No_Exception_Propagation);
+pragma Restrictions (No_Exception_Registration);
+
+pragma Restrictions (No_Implicit_Dynamic_Code);
+pragma Restrictions (No_Finalization);
+pragma Restrictions (No_Tasking);
+
+package System is
+   pragma Pure;
+   --  Note that we take advantage of the implementation permission to make
+   --  this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
+   --  2005, this is Pure in any case (AI-362).
+
+   pragma No_Elaboration_Code_All;
+   --  Allow the use of that restriction in units that WITH this unit
+
+   type Name is (SYSTEM_NAME_GNAT);
+   System_Name : constant Name := SYSTEM_NAME_GNAT;
+
+   --  System-Dependent Named Numbers
+
+   Min_Int               : constant := Long_Long_Integer'First;
+   Max_Int               : constant := Long_Long_Integer'Last;
+
+   Max_Binary_Modulus    : constant := 2 ** Long_Long_Integer'Size;
+   Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;
+
+   Max_Base_Digits       : constant := Long_Long_Float'Digits;
+   Max_Digits            : constant := Long_Long_Float'Digits;
+
+   Max_Mantissa          : constant := 63;
+   Fine_Delta            : constant := 2.0 ** (-Max_Mantissa);
+
+   Tick                  : constant := 0.01;
+
+   --  Storage-related Declarations
+
+   type Address is private;
+   --  Note that we do NOT add pragma Preelaborable_Initialization in this
+   --  version of System, since it is used for the compiler only, and typical
+   --  earlier bootstrap compilers don't support this pragma. We don't need
+   --  it in this context, so there is no problem in omitting it.
+   Null_Address : constant Address;
+
+   Storage_Unit : constant := Standard'Storage_Unit;
+   Word_Size    : constant := Standard'Word_Size;
+   Memory_Size  : constant := 2 ** Standard'Address_Size;
+
+   --  Address comparison
+
+   function "<"  (Left, Right : Address) return Boolean;
+   function "<=" (Left, Right : Address) return Boolean;
+   function ">"  (Left, Right : Address) return Boolean;
+   function ">=" (Left, Right : Address) return Boolean;
+   function "="  (Left, Right : Address) return Boolean;
+
+   pragma Import (Intrinsic, "<");
+   pragma Import (Intrinsic, "<=");
+   pragma Import (Intrinsic, ">");
+   pragma Import (Intrinsic, ">=");
+   pragma Import (Intrinsic, "=");
+
+   --  Other System-Dependent Declarations
+
+   type Bit_Order is (High_Order_First, Low_Order_First);
+   Default_Bit_Order : constant Bit_Order :=
+                         Bit_Order'Val (Standard'Default_Bit_Order);
+   pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning
+
+   --  Priority-related Declarations (RM D.1)
+
+   Max_Priority           : constant Positive := 30;
+   Max_Interrupt_Priority : constant Positive := 31;
+
+   subtype Any_Priority       is Integer      range  0 .. 31;
+   subtype Priority           is Any_Priority range  0 .. 30;
+   subtype Interrupt_Priority is Any_Priority range 31 .. 31;
+
+   Default_Priority : constant Priority := 15;
+
+private
+
+   Run_Time_Name : constant String := "coreboot Zero Footprint Run Time";
+
+   type Address is mod Memory_Size;
+   Null_Address : constant Address := 0;
+
+   --------------------------------------
+   -- System Implementation Parameters --
+   --------------------------------------
+
+   --  These parameters provide information about the target that is used by
+   --  the compiler. They are in the private part of System, where they can be
+   --  accessed using the special circuitry in the Targparm unit whose source
+   --  should be consulted for more detailed descriptions of the individual
+   --  switch values.
+
+   --  This version of system.ads is used only for building the compiler.
+   --  We really ought to use the proper target system (i.e. the one that
+   --  corresponds to the host for the compiler), but that causes as yet
+   --  unsolved makefile problems. For the most part the setting of these
+   --  parameters is not too critical for the compiler version (e.g. we
+   --  do not use floating-point anyway in the compiler).
+
+   AAMP                      : constant Boolean := False;
+   Backend_Divide_Checks     : constant Boolean := False;
+   Backend_Overflow_Checks   : constant Boolean := True;
+   Command_Line_Args         : constant Boolean := False;
+   Configurable_Run_Time     : constant Boolean := True;
+   Denorm                    : constant Boolean := True;
+   Duration_32_Bits          : constant Boolean := False;
+   Exit_Status_Supported     : constant Boolean := False;
+   Fractional_Fixed_Ops      : constant Boolean := False;
+   Frontend_Layout           : constant Boolean := False;
+   Machine_Overflows         : constant Boolean := False;
+   Machine_Rounds            : constant Boolean := True;
+   Preallocated_Stacks       : constant Boolean := False;
+   Signed_Zeros              : constant Boolean := True;
+   Stack_Check_Default       : constant Boolean := False;
+   Stack_Check_Probes        : constant Boolean := False;
+   Stack_Check_Limits        : constant Boolean := False;
+   Support_Aggregates        : constant Boolean := True;
+   Support_Composite_Assign  : constant Boolean := True;
+   Support_Composite_Compare : constant Boolean := True;
+   Support_Long_Shifts       : constant Boolean := True;
+   Always_Compatible_Rep     : constant Boolean := True;
+   Suppress_Standard_Library : constant Boolean := True;
+   Use_Ada_Main_Program_Name : constant Boolean := False;
+   ZCX_By_Default            : constant Boolean := False;
+
+   --  Obsolete entries, to be removed eventually (bootstrap issues)
+
+   Front_End_ZCX_Support     : constant Boolean := False;
+   High_Integrity_Mode       : constant Boolean := False;
+   Long_Shifts_Inlined       : constant Boolean := True;
+   Functions_Return_By_DSP   : constant Boolean := False;
+   Support_64_Bit_Divides    : constant Boolean := True;
+   GCC_ZCX_Support           : constant Boolean := False;
+
+end System;