+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- SYSTEM.MACHINE_STATE_OPERATIONS --
--- --
--- B o d y --
--- (Version for Alpha/Dec Unix) --
--- --
--- $Revision: 1.1 $
--- --
--- Copyright (C) 1999-2001 Ada Core Technologies, 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 2, 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
--- --
-------------------------------------------------------------------------------
-
--- This version of System.Machine_State_Operations is for use on
--- Alpha systems running DEC Unix.
-
-with System.Memory;
-
-package body System.Machine_State_Operations is
-
- use System.Exceptions;
-
- pragma Linker_Options ("-lexc");
- -- Needed for definitions of exc_capture_context and exc_virtual_unwind
-
- ----------------------------
- -- Allocate_Machine_State --
- ----------------------------
-
- function Allocate_Machine_State return Machine_State is
- use System.Storage_Elements;
-
- function c_machine_state_length return Storage_Offset;
- pragma Import (C, c_machine_state_length, "__gnat_machine_state_length");
-
- begin
- return Machine_State
- (Memory.Alloc (Memory.size_t (c_machine_state_length)));
- end Allocate_Machine_State;
-
- -------------------
- -- Enter_Handler --
- -------------------
-
- procedure Enter_Handler (M : Machine_State; Handler : Handler_Loc) is
- procedure c_enter_handler (M : Machine_State; Handler : Handler_Loc);
- pragma Import (C, c_enter_handler, "__gnat_enter_handler");
-
- begin
- c_enter_handler (M, Handler);
- end Enter_Handler;
-
- ----------------
- -- Fetch_Code --
- ----------------
-
- function Fetch_Code (Loc : Code_Loc) return Code_Loc is
- begin
- return Loc;
- end Fetch_Code;
-
- ------------------------
- -- Free_Machine_State --
- ------------------------
-
- procedure Free_Machine_State (M : in out Machine_State) is
- procedure Gnat_Free (M : in Machine_State);
- pragma Import (C, Gnat_Free, "__gnat_free");
-
- begin
- Gnat_Free (M);
- M := Machine_State (Null_Address);
- end Free_Machine_State;
-
- ------------------
- -- Get_Code_Loc --
- ------------------
-
- function Get_Code_Loc (M : Machine_State) return Code_Loc is
- Asm_Call_Size : constant := 4;
-
- function c_get_code_loc (M : Machine_State) return Code_Loc;
- pragma Import (C, c_get_code_loc, "__gnat_get_code_loc");
-
- -- Code_Loc returned by c_get_code_loc is the return point but here we
- -- want Get_Code_Loc to return the call point. Under DEC Unix a call
- -- asm instruction takes 4 bytes. So we must remove this value from
- -- c_get_code_loc to have the call point.
-
- begin
- return c_get_code_loc (M) - Asm_Call_Size;
- end Get_Code_Loc;
-
- --------------------------
- -- Machine_State_Length --
- --------------------------
-
- function Machine_State_Length
- return System.Storage_Elements.Storage_Offset
- is
- use System.Storage_Elements;
-
- function c_machine_state_length return Storage_Offset;
- pragma Import (C, c_machine_state_length, "__gnat_machine_state_length");
-
- begin
- return c_machine_state_length;
- end Machine_State_Length;
-
- ---------------
- -- Pop_Frame --
- ---------------
-
- procedure Pop_Frame
- (M : Machine_State;
- Info : Subprogram_Info_Type)
- is
- procedure exc_virtual_unwind
- (Fcn : System.Address;
- M : Machine_State);
- pragma Import (C, exc_virtual_unwind, "exc_virtual_unwind");
-
- begin
- exc_virtual_unwind (System.Null_Address, M);
- end Pop_Frame;
-
- -----------------------
- -- Set_Machine_State --
- -----------------------
-
- procedure Set_Machine_State (M : Machine_State) is
- procedure c_capture_context (M : Machine_State);
- pragma Import (C, c_capture_context, "exc_capture_context");
-
- begin
- c_capture_context (M);
- Pop_Frame (M, System.Null_Address);
- end Set_Machine_State;
-
- ------------------------------
- -- Set_Signal_Machine_State --
- ------------------------------
-
- procedure Set_Signal_Machine_State
- (M : Machine_State;
- Context : System.Address) is
- begin
- null;
- end Set_Signal_Machine_State;
-
-end System.Machine_State_Operations;
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