1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
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;
|
