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Diffstat (limited to 'gcc/ada/s-mastop-tru64.adb')
| -rw-r--r-- | gcc/ada/s-mastop-tru64.adb | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/gcc/ada/s-mastop-tru64.adb b/gcc/ada/s-mastop-tru64.adb new file mode 100644 index 00000000000..956efa4e553 --- /dev/null +++ b/gcc/ada/s-mastop-tru64.adb @@ -0,0 +1,181 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- SYSTEM.MACHINE_STATE_OPERATIONS -- +-- -- +-- B o d y -- +-- (Version for Alpha/Dec Unix) -- +-- -- +-- Copyright (C) 1999-2003 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. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- 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 + begin + Memory.Free (Address (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. + + Loc : constant Code_Loc := c_get_code_loc (M); + + begin + if Loc = 0 then + return 0; + else + return Loc - Asm_Call_Size; + end if; + 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 + pragma Warnings (Off, Info); + + 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 + pragma Warnings (Off, M); + pragma Warnings (Off, Context); + + begin + null; + end Set_Signal_Machine_State; + +end System.Machine_State_Operations; |