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Diffstat (limited to 'gcc-4.8.3/gcc/ada/s-stchop-rtems.adb')
| -rw-r--r-- | gcc-4.8.3/gcc/ada/s-stchop-rtems.adb | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/s-stchop-rtems.adb b/gcc-4.8.3/gcc/ada/s-stchop-rtems.adb new file mode 100644 index 000000000..ac0cfd0f4 --- /dev/null +++ b/gcc-4.8.3/gcc/ada/s-stchop-rtems.adb @@ -0,0 +1,113 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- S Y S T E M . S T A C K _ C H E C K I N G . O P E R A T I O N S -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1999-2009, Free Software Foundation, Inc. -- +-- -- +-- GNARL 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/>. -- +-- -- +-- GNARL was developed by the GNARL team at Florida State University. -- +-- Extensive contributions were provided by Ada Core Technologies, Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This is the RTEMS version of this package. +-- This file should be kept synchronized with the general implementation +-- provided by s-stchop.adb. + +pragma Restrictions (No_Elaboration_Code); +-- We want to guarantee the absence of elaboration code because the +-- binder does not handle references to this package. + +with Ada.Exceptions; + +with Interfaces.C; use Interfaces.C; + +package body System.Stack_Checking.Operations is + + ---------------------------- + -- Invalidate_Stack_Cache -- + ---------------------------- + + procedure Invalidate_Stack_Cache (Any_Stack : Stack_Access) is + pragma Warnings (Off, Any_Stack); + begin + Cache := Null_Stack; + end Invalidate_Stack_Cache; + + ----------------------------- + -- Notify_Stack_Attributes -- + ----------------------------- + + procedure Notify_Stack_Attributes + (Initial_SP : System.Address; + Size : System.Storage_Elements.Storage_Offset) + is + + -- RTEMS keeps all the information we need. + + pragma Unreferenced (Size); + pragma Unreferenced (Initial_SP); + + begin + null; + end Notify_Stack_Attributes; + + ----------------- + -- Stack_Check -- + ----------------- + + function Stack_Check + (Stack_Address : System.Address) return Stack_Access + is + pragma Unreferenced (Stack_Address); + + -- RTEMS has a routine to check if the stack is blown. + -- It returns a C99 bool. + function rtems_stack_checker_is_blown return Interfaces.C.unsigned_char; + pragma Import (C, + rtems_stack_checker_is_blown, "rtems_stack_checker_is_blown"); + + begin + -- RTEMS has a routine to check this. So use it. + + if rtems_stack_checker_is_blown /= 0 then + Ada.Exceptions.Raise_Exception + (E => Storage_Error'Identity, + Message => "stack overflow detected"); + end if; + + return null; + + end Stack_Check; + + ------------------------ + -- Update_Stack_Cache -- + ------------------------ + + procedure Update_Stack_Cache (Stack : Stack_Access) is + begin + if not Multi_Processor then + Cache := Stack; + end if; + end Update_Stack_Cache; + +end System.Stack_Checking.Operations; |