[Ada] RTEMS: use default stack checking emulation package

gcc/ada/

	* Makefile.rtl (RTEMS): Add s-stchop.o to
	EXTRA_GNATRTL_NONTASKING_OBJS, remove s-stchop__rtems.adb.
	* libgnat/s-stchop__rtems.adb: Removed.

2 files changed, 2 insertions, 114 deletions

diff --git a/gcc/ada/Makefile.rtl b/gcc/ada/Makefile.rtl
index db21f01..75d1725 100644
--- a/gcc/ada/Makefile.rtl
+++ b/gcc/ada/Makefile.rtl
@@ -2057,9 +2057,10 @@ ifeq ($(strip $(filter-out rtems%,$(target_os))),)
   s-taprop.adb<libgnarl/s-taprop__posix.adb \
   s-taspri.ads<libgnarl/s-taspri__posix.ads \
   s-tpopsp.adb<libgnarl/s-tpopsp__tls.adb \
-  s-stchop.adb<libgnat/s-stchop__rtems.adb \
   s-interr.adb<libgnarl/s-interr__hwint.adb
 
+  EXTRA_GNATRTL_NONTASKING_OBJS += s-stchop.o
+
   ifeq ($(strip $(filter-out arm%, $(target_cpu))),)
     EH_MECHANISM=-arm
   else
diff --git a/gcc/ada/libgnat/s-stchop__rtems.adb b/gcc/ada/libgnat/s-stchop__rtems.adb
deleted file mode 100644
index f273f29..0000000
--- a/gcc/ada/libgnat/s-stchop__rtems.adb
+++ /dev/null
@@ -1,113 +0,0 @@
-------------------------------------------------------------------------------
---                                                                          --
---                 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) 1999-2021, 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;