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
114
|
------------------------------------------------------------------------------
-- --
-- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- S Y S T E M . I N T E R R U P T _ M A N A G E M E N T --
-- --
-- B o d y --
-- --
-- --
-- Copyright (C) 1997-1998, Florida State University --
-- --
-- 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 2, or (at your option) any later ver- --
-- sion. GNARL 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. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNARL; see file COPYING. If not, write --
-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. It is --
-- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
-- State University (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
-- This is an Irix (old pthread library) version of this package.
-- PLEASE DO NOT add any dependences on other packages.
-- This package is designed to work with or without tasking support.
-- Make a careful study of all signals available under the OS,
-- to see which need to be reserved, kept always unmasked,
-- or kept always unmasked.
-- Be on the lookout for special signals that
-- may be used by the thread library.
with System.OS_Interface;
-- used for various Constants, Signal and types
package body System.Interrupt_Management is
use System.OS_Interface;
type Interrupt_List is array (Interrupt_ID range <>) of Interrupt_ID;
Exception_Interrupts : constant Interrupt_List :=
(SIGILL,
SIGABRT,
SIGFPE,
SIGSEGV,
SIGBUS);
Reserved_Interrupts : constant Interrupt_List :=
(0,
SIGTRAP,
SIGKILL,
SIGSYS,
SIGALRM,
SIGSTOP,
SIGPTINTR,
SIGPTRESCHED);
Abort_Signal : constant := 48;
--
-- Serious MOJO: The SGI pthreads library only supports the
-- unnamed signal number 48 for pthread_kill!
--
----------------------
-- Notify_Exception --
----------------------
-- This function identifies the Ada exception to be raised using the
-- information when the system received a synchronous signal.
-- Since this function is machine and OS dependent, different code has to
-- be provided for different target.
-- On SGI, the signal handling is done is a-init.c, even when tasking is
-- involved.
---------------------------
-- Initialize_Interrupts --
---------------------------
-- Nothing needs to be done on this platform.
procedure Initialize_Interrupts is
begin
null;
end Initialize_Interrupts;
begin
Abort_Task_Interrupt := Abort_Signal;
for I in Reserved_Interrupts'Range loop
Keep_Unmasked (Reserved_Interrupts (I)) := True;
Reserve (Reserved_Interrupts (I)) := True;
end loop;
for I in Exception_Interrupts'Range loop
Keep_Unmasked (Exception_Interrupts (I)) := True;
Reserve (Reserved_Interrupts (I)) := True;
end loop;
end System.Interrupt_Management;
|
