111
|
1 ------------------------------------------------------------------------------
|
|
2 -- --
|
|
3 -- GNAT RUN-TIME COMPONENTS --
|
|
4 -- --
|
|
5 -- S Y S T E M --
|
|
6 -- --
|
|
7 -- S p e c --
|
|
8 -- (Darwin/ARM Version) --
|
|
9 -- --
|
131
|
10 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
|
111
|
11 -- --
|
|
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. --
|
|
15 -- --
|
|
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 3, 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. --
|
|
22 -- --
|
|
23 -- As a special exception under Section 7 of GPL version 3, you are granted --
|
|
24 -- additional permissions described in the GCC Runtime Library Exception, --
|
|
25 -- version 3.1, as published by the Free Software Foundation. --
|
|
26 -- --
|
|
27 -- You should have received a copy of the GNU General Public License and --
|
|
28 -- a copy of the GCC Runtime Library Exception along with this program; --
|
|
29 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
|
|
30 -- <http://www.gnu.org/licenses/>. --
|
|
31 -- --
|
|
32 -- GNAT was originally developed by the GNAT team at New York University. --
|
|
33 -- Extensive contributions were provided by Ada Core Technologies Inc. --
|
|
34 -- --
|
|
35 ------------------------------------------------------------------------------
|
|
36
|
|
37 package System is
|
|
38 pragma Pure;
|
|
39 -- Note that we take advantage of the implementation permission to make
|
|
40 -- this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
|
|
41 -- 2005, this is Pure in any case (AI-362).
|
|
42
|
|
43 pragma No_Elaboration_Code_All;
|
|
44 -- Allow the use of that restriction in units that WITH this unit
|
|
45
|
|
46 type Name is (SYSTEM_NAME_GNAT);
|
|
47 System_Name : constant Name := SYSTEM_NAME_GNAT;
|
|
48
|
|
49 -- System-Dependent Named Numbers
|
|
50
|
|
51 Min_Int : constant := Long_Long_Integer'First;
|
|
52 Max_Int : constant := Long_Long_Integer'Last;
|
|
53
|
|
54 Max_Binary_Modulus : constant := 2 ** Long_Long_Integer'Size;
|
|
55 Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;
|
|
56
|
|
57 Max_Base_Digits : constant := Long_Long_Float'Digits;
|
|
58 Max_Digits : constant := Long_Long_Float'Digits;
|
|
59
|
|
60 Max_Mantissa : constant := 63;
|
|
61 Fine_Delta : constant := 2.0 ** (-Max_Mantissa);
|
|
62
|
|
63 Tick : constant := 0.01;
|
|
64
|
|
65 -- Storage-related Declarations
|
|
66
|
|
67 type Address is private;
|
|
68 pragma Preelaborable_Initialization (Address);
|
|
69 Null_Address : constant Address;
|
|
70
|
|
71 Storage_Unit : constant := 8;
|
|
72 Word_Size : constant := Standard'Word_Size;
|
|
73 Memory_Size : constant := 2 ** Word_Size;
|
|
74
|
|
75 -- Address comparison
|
|
76
|
|
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;
|
|
81 function "=" (Left, Right : Address) return Boolean;
|
|
82
|
|
83 pragma Import (Intrinsic, "<");
|
|
84 pragma Import (Intrinsic, "<=");
|
|
85 pragma Import (Intrinsic, ">");
|
|
86 pragma Import (Intrinsic, ">=");
|
|
87 pragma Import (Intrinsic, "=");
|
|
88
|
|
89 -- Other System-Dependent Declarations
|
|
90
|
|
91 type Bit_Order is (High_Order_First, Low_Order_First);
|
|
92 Default_Bit_Order : constant Bit_Order := Low_Order_First;
|
|
93 pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning
|
|
94
|
|
95 -- Priority-related Declarations (RM D.1)
|
|
96
|
|
97 -- The values defined here are derived from the following Darwin
|
|
98 -- sources:
|
|
99 --
|
|
100 -- Libc/pthreads/pthread.c
|
|
101 -- pthread_init calls host_info to retrieve the HOST_PRIORITY_INFO.
|
|
102 -- This file includes "pthread_internals".
|
|
103 -- Libc/pthreads/pthread_internals.h
|
|
104 -- This file includes <mach/mach.h>.
|
|
105 -- xnu/osfmk/mach/mach.h
|
|
106 -- This file includes <mach/mach_types.h>.
|
|
107 -- xnu/osfmk/mach/mach_types.h
|
|
108 -- This file includes <mach/host_info.h>.
|
|
109 -- xnu/osfmk/mach/host_info.h
|
|
110 -- This file contains the definition of the host_info_t data structure
|
|
111 -- and the function prototype for host_info.
|
|
112 -- xnu/osfmk/kern/host.c
|
|
113 -- This file defines the function host_info which sets the
|
|
114 -- priority_info field of struct host_info_t. This file includes
|
|
115 -- <kern/processor.h>.
|
|
116 -- xnu/osfmk/kern/processor.h
|
|
117 -- This file includes <kern/sched.h>.
|
|
118 -- xnu/osfmk/kern/sched.h
|
|
119 -- This file defines the values for each level of priority.
|
|
120
|
|
121 Max_Interrupt_Priority : constant Positive := 63;
|
|
122 Max_Priority : constant Positive := Max_Interrupt_Priority - 1;
|
|
123
|
|
124 subtype Any_Priority is Integer range 0 .. Max_Interrupt_Priority;
|
|
125 subtype Priority is Any_Priority range 0 .. Max_Priority;
|
|
126 subtype Interrupt_Priority is Any_Priority
|
|
127 range Priority'Last + 1 .. Max_Interrupt_Priority;
|
|
128
|
|
129 Default_Priority : constant Priority :=
|
|
130 (Priority'Last - Priority'First) / 2;
|
|
131
|
|
132 private
|
|
133
|
|
134 type Address is mod Memory_Size;
|
|
135 Null_Address : constant Address := 0;
|
|
136
|
|
137 --------------------------------------
|
|
138 -- System Implementation Parameters --
|
|
139 --------------------------------------
|
|
140
|
|
141 -- These parameters provide information about the target that is used
|
|
142 -- by the compiler. They are in the private part of System, where they
|
|
143 -- can be accessed using the special circuitry in the Targparm unit
|
|
144 -- whose source should be consulted for more detailed descriptions
|
|
145 -- of the individual switch values.
|
|
146
|
|
147 Backend_Divide_Checks : constant Boolean := False;
|
|
148 Backend_Overflow_Checks : constant Boolean := True;
|
|
149 Command_Line_Args : constant Boolean := True;
|
|
150 Configurable_Run_Time : constant Boolean := False;
|
|
151 Denorm : constant Boolean := True;
|
|
152 Duration_32_Bits : constant Boolean := False;
|
|
153 Exit_Status_Supported : constant Boolean := True;
|
|
154 Fractional_Fixed_Ops : constant Boolean := False;
|
|
155 Frontend_Layout : constant Boolean := False;
|
|
156 Machine_Overflows : constant Boolean := False;
|
|
157 Machine_Rounds : constant Boolean := True;
|
|
158 Preallocated_Stacks : constant Boolean := False;
|
|
159 Signed_Zeros : constant Boolean := True;
|
|
160 Stack_Check_Default : constant Boolean := False;
|
|
161 Stack_Check_Probes : constant Boolean := True;
|
|
162 Stack_Check_Limits : constant Boolean := False;
|
|
163 Support_Aggregates : constant Boolean := True;
|
|
164 Support_Atomic_Primitives : constant Boolean := True;
|
|
165 Support_Composite_Assign : constant Boolean := True;
|
|
166 Support_Composite_Compare : constant Boolean := True;
|
|
167 Support_Long_Shifts : constant Boolean := True;
|
|
168 Always_Compatible_Rep : constant Boolean := False;
|
|
169 Suppress_Standard_Library : constant Boolean := False;
|
|
170 Use_Ada_Main_Program_Name : constant Boolean := False;
|
|
171 Frontend_Exceptions : constant Boolean := False;
|
|
172 ZCX_By_Default : constant Boolean := True;
|
|
173
|
|
174 end System;
|