1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
8 -- (Windows Version) --
10 -- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
12 -- This specification is derived from the Ada Reference Manual for use with --
13 -- GNAT. The copyright notice above, and the license provisions that follow --
14 -- apply solely to the contents of the part following the private keyword. --
16 -- GNAT is free software; you can redistribute it and/or modify it under --
17 -- terms of the GNU General Public License as published by the Free Soft- --
18 -- ware Foundation; either version 2, or (at your option) any later ver- --
19 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
20 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
21 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
22 -- for more details. You should have received a copy of the GNU General --
23 -- Public License distributed with GNAT; see file COPYING. If not, write --
24 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
25 -- Boston, MA 02110-1301, USA. --
27 -- As a special exception, if other files instantiate generics from this --
28 -- unit, or you link this unit with other files to produce an executable, --
29 -- this unit does not by itself cause the resulting executable to be --
30 -- covered by the GNU General Public License. This exception does not --
31 -- however invalidate any other reasons why the executable file might be --
32 -- covered by the GNU Public License. --
34 -- GNAT was originally developed by the GNAT team at New York University. --
35 -- Extensive contributions were provided by Ada Core Technologies Inc. --
37 ------------------------------------------------------------------------------
41 -- Note that we take advantage of the implementation permission to make
42 -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
43 -- 2005, this is Pure in any case (AI-362).
45 type Name
is (SYSTEM_NAME_GNAT
);
46 System_Name
: constant Name
:= SYSTEM_NAME_GNAT
;
48 -- System-Dependent Named Numbers
50 Min_Int
: constant := Long_Long_Integer'First;
51 Max_Int
: constant := Long_Long_Integer'Last;
53 Max_Binary_Modulus
: constant := 2 ** Long_Long_Integer'Size;
54 Max_Nonbinary_Modulus
: constant := 2 ** Integer'Size - 1;
56 Max_Base_Digits
: constant := Long_Long_Float'Digits;
57 Max_Digits
: constant := Long_Long_Float'Digits;
59 Max_Mantissa
: constant := 63;
60 Fine_Delta
: constant := 2.0 ** (-Max_Mantissa
);
62 Tick
: constant := 0.01;
64 -- Storage-related Declarations
66 type Address
is private;
67 pragma Preelaborable_Initialization
(Address
);
68 Null_Address
: constant Address
;
70 Storage_Unit
: constant := 8;
71 Word_Size
: constant := 32;
72 Memory_Size
: constant := 2 ** 32;
76 function "<" (Left
, Right
: Address
) return Boolean;
77 function "<=" (Left
, Right
: Address
) return Boolean;
78 function ">" (Left
, Right
: Address
) return Boolean;
79 function ">=" (Left
, Right
: Address
) return Boolean;
80 function "=" (Left
, Right
: Address
) return Boolean;
82 pragma Import
(Intrinsic
, "<");
83 pragma Import
(Intrinsic
, "<=");
84 pragma Import
(Intrinsic
, ">");
85 pragma Import
(Intrinsic
, ">=");
86 pragma Import
(Intrinsic
, "=");
88 -- Other System-Dependent Declarations
90 type Bit_Order
is (High_Order_First
, Low_Order_First
);
91 Default_Bit_Order
: constant Bit_Order
:= Low_Order_First
;
92 pragma Warnings
(Off
, Default_Bit_Order
); -- kill constant condition warning
94 -- Priority-related Declarations (RM D.1)
96 Max_Priority
: constant Positive := 30;
97 Max_Interrupt_Priority
: constant Positive := 31;
99 subtype Any_Priority
is Integer range 0 .. 31;
100 subtype Priority
is Any_Priority
range 0 .. 30;
101 subtype Interrupt_Priority
is Any_Priority
range 31 .. 31;
103 Default_Priority
: constant Priority
:= 15;
107 type Address
is mod Memory_Size
;
108 Null_Address
: constant Address
:= 0;
110 --------------------------------------
111 -- System Implementation Parameters --
112 --------------------------------------
114 -- These parameters provide information about the target that is used
115 -- by the compiler. They are in the private part of System, where they
116 -- can be accessed using the special circuitry in the Targparm unit
117 -- whose source should be consulted for more detailed descriptions
118 -- of the individual switch values.
120 Backend_Divide_Checks
: constant Boolean := False;
121 Backend_Overflow_Checks
: constant Boolean := False;
122 Command_Line_Args
: constant Boolean := True;
123 Configurable_Run_Time
: constant Boolean := False;
124 Denorm
: constant Boolean := True;
125 Duration_32_Bits
: constant Boolean := False;
126 Exit_Status_Supported
: constant Boolean := True;
127 Fractional_Fixed_Ops
: constant Boolean := False;
128 Frontend_Layout
: constant Boolean := False;
129 Machine_Overflows
: constant Boolean := False;
130 Machine_Rounds
: constant Boolean := True;
131 Preallocated_Stacks
: constant Boolean := False;
132 Signed_Zeros
: constant Boolean := True;
133 Stack_Check_Default
: constant Boolean := False;
134 Stack_Check_Probes
: constant Boolean := True;
135 Stack_Check_Limits
: constant Boolean := False;
136 Support_64_Bit_Divides
: constant Boolean := True;
137 Support_Aggregates
: constant Boolean := True;
138 Support_Composite_Assign
: constant Boolean := True;
139 Support_Composite_Compare
: constant Boolean := True;
140 Support_Long_Shifts
: constant Boolean := True;
141 Always_Compatible_Rep
: constant Boolean := True;
142 Suppress_Standard_Library
: constant Boolean := False;
143 Use_Ada_Main_Program_Name
: constant Boolean := False;
144 ZCX_By_Default
: constant Boolean := False;
145 GCC_ZCX_Support
: constant Boolean := True;
147 ---------------------------
148 -- Underlying Priorities --
149 ---------------------------
151 -- Important note: this section of the file must come AFTER the
152 -- definition of the system implementation parameters to ensure
153 -- that the value of these parameters is available for analysis
154 -- of the declarations here (using Rtsfind at compile time).
156 -- The underlying priorities table provides a generalized mechanism
157 -- for mapping from Ada priorities to system priorities. In some
158 -- cases a 1-1 mapping is not the convenient or optimal choice.
160 type Priorities_Mapping
is array (Any_Priority
) of Integer;
161 pragma Suppress_Initialization
(Priorities_Mapping
);
162 -- Suppress initialization in case gnat.adc specifies Normalize_Scalars
164 Underlying_Priorities
: constant Priorities_Mapping
:=
166 Default_Priority
- 8 => -15,
167 Default_Priority
- 7 => -7,
168 Default_Priority
- 6 => -6,
169 Default_Priority
- 5 => -5,
170 Default_Priority
- 4 => -4,
171 Default_Priority
- 3 => -3,
172 Default_Priority
- 2 => -2,
173 Default_Priority
- 1 => -1,
174 Default_Priority
=> 0,
175 Default_Priority
+ 1 => 1,
176 Default_Priority
+ 2 => 2,
177 Default_Priority
+ 3 => 3,
178 Default_Priority
+ 4 => 4,
179 Default_Priority
+ 5 => 5,
180 Default_Priority
+ 6 ..
182 Interrupt_Priority
=> 15);
183 -- The default mapping preserves the standard 31 priorities of the Ada
184 -- model, but maps them using compression onto the 7 priority levels
185 -- available in NT and on the 16 priority levels available in 2000/XP.
187 -- To replace the default values of the Underlying_Priorities mapping,
188 -- copy this source file into your build directory, edit the file to
189 -- reflect your desired behavior, and recompile using Makefile.adalib
190 -- which can be found under the adalib directory of your gnat installation
192 pragma Linker_Options
("-Wl,--stack=0x2000000");
193 -- This is used to change the default stack (32 MB) size for non tasking
194 -- programs. We change this value for GNAT on Windows here because the
195 -- binutils on this platform have switched to a too low value for Ada
196 -- programs. Note that we also set the stack size for tasking programs in
197 -- System.Task_Primitives.Operations.