Add ortho_jit package for mcode.

1 files changed, 133 insertions, 0 deletions

diff --git a/ortho/mcode/ortho_jit.adb b/ortho/mcode/ortho_jit.adb
new file mode 100644
index 0000000..92109f1
--- /dev/null
+++ b/ortho/mcode/ortho_jit.adb
@@ -0,0 +1,133 @@
+--  Ortho JIT implementation for mcode.
+--  Copyright (C) 2009 Tristan Gingold
+--
+--  GHDL 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 2, or (at your option) any later
+--  version.
+--
+--  GHDL 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 GCC; see the file COPYING.  If not, write to the Free
+--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+--  02111-1307, USA.
+
+with GNAT.OS_Lib; use GNAT.OS_Lib;
+with Ada.Unchecked_Conversion;
+with Ada.Text_IO;
+
+with Binary_File; use Binary_File;
+with Binary_File.Memory;
+with Ortho_Mcode; use Ortho_Mcode;
+with Ortho_Code.Flags; use Ortho_Code.Flags;
+with Ortho_Code.Binary;
+with Ortho_Code.Debug;
+with Ortho_Code.Abi;
+with Binary_File.Elf;
+
+package body Ortho_Jit is
+   Snap_Filename : GNAT.OS_Lib.String_Access := null;
+
+   --  Initialize the whole engine.
+   procedure Init is
+   begin
+      Ortho_Mcode.Init;
+      Binary_File.Memory.Write_Memory_Init;
+   end Init;
+
+   --  Set address of non-defined global variables or functions.
+   procedure Set_Address (Decl : O_Dnode; Addr : Address)
+   is
+      use Ortho_Code.Binary;
+   begin
+      Binary_File.Memory.Set_Symbol_Address (Get_Decl_Symbol (Decl), Addr);
+   end Set_Address;
+
+   --  Get address of a global.
+   function Get_Address (Decl : O_Dnode) return Address
+   is
+      use Ortho_Code.Binary;
+
+      function Conv is new Ada.Unchecked_Conversion
+        (Source => Pc_Type, Target => Address);
+   begin
+      return Conv (Get_Symbol_Vaddr (Get_Decl_Symbol (Decl)));
+   end Get_Address;
+
+   --  Do link.
+   procedure Link (Status : out Boolean) is
+   begin
+      if Ortho_Code.Debug.Flag_Debug_Hli then
+         --  Can't generate code in HLI.
+         Status := True;
+         return;
+      end if;
+
+      Ortho_Mcode.Finish;
+
+      Ortho_Code.Abi.Link_Intrinsics;
+
+      Binary_File.Memory.Write_Memory_Relocate (Status);
+      if Status then
+         return;
+      end if;
+
+      if Snap_Filename /= null then
+         declare
+            use Ada.Text_IO;
+            Fd : File_Descriptor;
+         begin
+            Fd := Create_File (Snap_Filename.all, Binary);
+            if Fd = Invalid_FD then
+               Put_Line (Standard_Error,
+                         "can't open '" & Snap_Filename.all & "'");
+               Status := False;
+               return;
+            else
+               Binary_File.Elf.Write_Elf (Fd);
+               Close (Fd);
+            end if;
+         end;
+      end if;
+   end Link;
+
+   procedure Finish is
+   begin
+      --  Free all the memory.
+      Ortho_Mcode.Free_All;
+
+      Binary_File.Finish;
+   end Finish;
+
+   function Decode_Option (Option : String) return Boolean
+   is
+      Opt : constant String (1 .. Option'Length) := Option;
+   begin
+      if Opt = "-g" then
+         Flag_Debug := Debug_Dwarf;
+         return True;
+      elsif Opt'Length > 5 and then Opt (1 .. 5) = "--be-" then
+         Ortho_Code.Debug.Set_Be_Flag (Opt);
+         return True;
+      elsif Opt'Length > 7 and then Opt (1 .. 7) = "--snap=" then
+         Snap_Filename := new String'(Opt (8 .. Opt'Last));
+         return True;
+      else
+         return False;
+      end if;
+   end Decode_Option;
+
+   procedure Disp_Help is
+      use Ada.Text_IO;
+   begin
+      Put_Line (" -g             Generate debugging informations");
+      Put_Line (" --debug-be=X   Set X internal debugging flags");
+      Put_Line (" --snap=FILE    Write memory snapshot to FILE");
+   end Disp_Help;
+
+end Ortho_Jit;
+