From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/ada/s-mastop-tru64.adb | 165 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 165 insertions(+) create mode 100644 gcc/ada/s-mastop-tru64.adb (limited to 'gcc/ada/s-mastop-tru64.adb') diff --git a/gcc/ada/s-mastop-tru64.adb b/gcc/ada/s-mastop-tru64.adb new file mode 100644 index 000000000..ce379033a --- /dev/null +++ b/gcc/ada/s-mastop-tru64.adb @@ -0,0 +1,165 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- SYSTEM.MACHINE_STATE_OPERATIONS -- +-- -- +-- B o d y -- +-- (Version for Alpha/Dec Unix) -- +-- -- +-- Copyright (C) 1999-2005, 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 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, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, 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 + + 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; + + ---------------- + -- 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) is + procedure exc_virtual_unwind (Fcn : System.Address; M : Machine_State); + pragma Import (C, exc_virtual_unwind, "exc_virtual_unwind"); + + function exc_lookup_function (Loc : Code_Loc) return System.Address; + pragma Import (C, exc_lookup_function, "exc_lookup_function_entry"); + + procedure c_set_code_loc (M : Machine_State; Loc : Code_Loc); + pragma Import (C, c_set_code_loc, "__gnat_set_code_loc"); + + -- Look for a code-range descriptor table containing the PC of the + -- specified machine state. If we don't find any, attempting to unwind + -- further would fail so we set the machine state's code location to a + -- value indicating that the top of the call chain is reached. This + -- happens when the function at the address pointed to by PC has not + -- been registered with the unwinding machinery, as with the __istart + -- functions generated by the linker in presence of initialization + -- routines for example. + + Prf : constant System.Address := exc_lookup_function (Get_Code_Loc (M)); + + begin + if Prf = System.Null_Address then + c_set_code_loc (M, 0); + else + exc_virtual_unwind (Prf, M); + end if; + 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); + end Set_Machine_State; + +end System.Machine_State_Operations; -- cgit v1.2.3