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Diffstat (limited to 'gcc/ada/5gintman.adb')
| -rw-r--r-- | gcc/ada/5gintman.adb | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/gcc/ada/5gintman.adb b/gcc/ada/5gintman.adb new file mode 100644 index 00000000000..ad3ef44169f --- /dev/null +++ b/gcc/ada/5gintman.adb @@ -0,0 +1,115 @@ +------------------------------------------------------------------------------ +-- -- +-- 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 -- +-- -- +-- $Revision: 1.6 $ -- +-- -- +-- 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; |