X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=gcc%2Fada%2F5lintman.adb;fp=gcc%2Fada%2F5lintman.adb;h=0000000000000000000000000000000000000000;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=28321e82aa8b636d3732256630296a4e5ed4d3b8;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/gcc/ada/5lintman.adb b/gcc/ada/5lintman.adb deleted file mode 100644 index 28321e82..00000000 --- a/gcc/ada/5lintman.adb +++ /dev/null @@ -1,357 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- 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: 1.3 $ --- -- --- Copyright (C) 1991-2001 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 the GNU/Linux version of this package - --- This file performs the system-dependent translation between machine --- exceptions and the Ada exceptions, if any, that should be raised when they --- occur. This version works for the x86 running linux. - --- This is a Sun OS (FSU THREADS) version of this package - --- PLEASE DO NOT add any dependences on other packages. ??? why not ??? --- 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. - --- The definitions of "reserved" differ slightly between the ARM and POSIX. --- Here is the ARM definition of reserved interrupt: - --- The set of reserved interrupts is implementation defined. A reserved --- interrupt is either an interrupt for which user-defined handlers are not --- supported, or one which already has an attached handler by some other --- implementation-defined means. Program units can be connected to --- non-reserved interrupts. - --- POSIX.5b/.5c specifies further: - --- Signals which the application cannot accept, and for which the application --- cannot modify the signal action or masking, because the signals are --- reserved for use by the Ada language implementation. The reserved signals --- defined by this standard are Signal_Abort, Signal_Alarm, --- Signal_Floating_Point_Error, Signal_Illegal_Instruction, --- Signal_Segmentation_Violation, Signal_Bus_Error. If the implementation --- supports any signals besides those defined by this standard, the --- implementation may also reserve some of those. - --- The signals defined by POSIX.5b/.5c that are not specified as being --- reserved are SIGHUP, SIGINT, SIGPIPE, SIGQUIT, SIGTERM, SIGUSR1, SIGUSR2, --- SIGCHLD, SIGCONT, SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU, SIGIO SIGURG, and all --- the real-time signals. - --- Beware of reserving signals that POSIX.5b/.5c require to be available for --- users. POSIX.5b/.5c say: - --- An implementation shall not impose restrictions on the ability of an --- application to send, accept, block, or ignore the signals defined by this --- standard, except as specified in this standard. - --- Here are some other relevant requirements from POSIX.5b/.5c: - --- For the environment task, the initial signal mask is that specified for --- the process... - --- It is anticipated that the paragraph above may be modified by a future --- revision of this standard, to require that the realtime signals always be --- initially masked for a process that is an Ada active partition. - --- For all other tasks, the initial signal mask shall include all the signals --- that are not reserved signals and are not bound to entries of the task. - -with Interfaces.C; --- used for int and other types - -with System.Error_Reporting; --- used for Shutdown - -with System.OS_Interface; --- used for various Constants, Signal and types - -with Ada.Exceptions; --- used for Exception_Id --- Raise_From_Signal_Handler - -with System.Soft_Links; --- used for Get_Machine_State_Addr - -with Unchecked_Conversion; - -package body System.Interrupt_Management is - - use Interfaces.C; - use System.Error_Reporting; - use System.OS_Interface; - - package TSL renames System.Soft_Links; - - type Interrupt_List is array (Interrupt_ID range <>) of Interrupt_ID; - Exception_Interrupts : constant Interrupt_List := - (SIGFPE, SIGILL, SIGSEGV); - - Unreserve_All_Interrupts : Interfaces.C.int; - pragma Import - (C, Unreserve_All_Interrupts, "__gl_unreserve_all_interrupts"); - - subtype int is Interfaces.C.int; - subtype unsigned_short is Interfaces.C.unsigned_short; - subtype unsigned_long is Interfaces.C.unsigned_long; - - ---------------------- - -- Notify_Exception -- - ---------------------- - - Signal_Mask : aliased sigset_t; - -- The set of signals handled by 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. - - procedure Notify_Exception - (signo : Signal; - gs : unsigned_short; - fs : unsigned_short; - es : unsigned_short; - ds : unsigned_short; - edi : unsigned_long; - esi : unsigned_long; - ebp : unsigned_long; - esp : unsigned_long; - ebx : unsigned_long; - edx : unsigned_long; - ecx : unsigned_long; - eax : unsigned_long; - trapno : unsigned_long; - err : unsigned_long; - eip : unsigned_long; - cs : unsigned_short; - eflags : unsigned_long; - esp_at_signal : unsigned_long; - ss : unsigned_short; - fpstate : System.Address; - oldmask : unsigned_long; - cr2 : unsigned_long); - - procedure Notify_Exception - (signo : Signal; - gs : unsigned_short; - fs : unsigned_short; - es : unsigned_short; - ds : unsigned_short; - edi : unsigned_long; - esi : unsigned_long; - ebp : unsigned_long; - esp : unsigned_long; - ebx : unsigned_long; - edx : unsigned_long; - ecx : unsigned_long; - eax : unsigned_long; - trapno : unsigned_long; - err : unsigned_long; - eip : unsigned_long; - cs : unsigned_short; - eflags : unsigned_long; - esp_at_signal : unsigned_long; - ss : unsigned_short; - fpstate : System.Address; - oldmask : unsigned_long; - cr2 : unsigned_long) - is - - function To_Machine_State_Ptr is new - Unchecked_Conversion (Address, Machine_State_Ptr); - - -- These are not directly visible - - procedure Raise_From_Signal_Handler - (E : Ada.Exceptions.Exception_Id; - M : System.Address); - pragma Import - (Ada, Raise_From_Signal_Handler, - "ada__exceptions__raise_from_signal_handler"); - pragma No_Return (Raise_From_Signal_Handler); - - mstate : Machine_State_Ptr; - message : aliased constant String := "" & ASCII.Nul; - -- a null terminated String. - - Result : int; - - begin - - -- Raise_From_Signal_Handler makes sure that the exception is raised - -- safely from this signal handler. - - -- ??? The original signal mask (the one we had before coming into this - -- signal catching function) should be restored by - -- Raise_From_Signal_Handler. For now, restore it explicitly - - Result := pthread_sigmask (SIG_UNBLOCK, Signal_Mask'Access, null); - pragma Assert (Result = 0); - - -- Check that treatment of exception propagation here - -- is consistent with treatment of the abort signal in - -- System.Task_Primitives.Operations. - - mstate := To_Machine_State_Ptr (TSL.Get_Machine_State_Addr.all); - mstate.eip := eip; - mstate.ebx := ebx; - mstate.esp := esp_at_signal; - mstate.ebp := ebp; - mstate.esi := esi; - mstate.edi := edi; - - case signo is - when SIGFPE => - Raise_From_Signal_Handler - (Constraint_Error'Identity, message'Address); - when SIGILL => - Raise_From_Signal_Handler - (Constraint_Error'Identity, message'Address); - when SIGSEGV => - Raise_From_Signal_Handler - (Storage_Error'Identity, message'Address); - when others => - if Shutdown ("Unexpected signal") then - null; - end if; - end case; - end Notify_Exception; - - --------------------------- - -- Initialize_Interrupts -- - --------------------------- - - -- Nothing needs to be done on this platform. - - procedure Initialize_Interrupts is - begin - null; - end Initialize_Interrupts; - -begin - declare - act : aliased struct_sigaction; - old_act : aliased struct_sigaction; - Result : int; - - begin - - -- Need to call pthread_init very early because it is doing signal - -- initializations. - - pthread_init; - - Abort_Task_Interrupt := SIGADAABORT; - - act.sa_handler := Notify_Exception'Address; - - act.sa_flags := 0; - -- On some targets, we set sa_flags to SA_NODEFER so that during the - -- handler execution we do not change the Signal_Mask to be masked for - -- the Signal. - -- This is a temporary fix to the problem that the Signal_Mask is - -- not restored after the exception (longjmp) from the handler. - -- The right fix should be made in sigsetjmp so that we save - -- the Signal_Set and restore it after a longjmp. - -- Since SA_NODEFER is obsolete, instead we reset explicitly - -- the mask in the exception handler. - - Result := sigemptyset (Signal_Mask'Access); - pragma Assert (Result = 0); - - for J in Exception_Interrupts'Range loop - Result := - sigaddset (Signal_Mask'Access, Signal (Exception_Interrupts (J))); - pragma Assert (Result = 0); - end loop; - - act.sa_mask := Signal_Mask; - - Result := - sigaction - (Signal (SIGFPE), act'Unchecked_Access, - old_act'Unchecked_Access); - pragma Assert (Result = 0); - - for J in Exception_Interrupts'First + 1 .. Exception_Interrupts'Last loop - Keep_Unmasked (Exception_Interrupts (J)) := True; - if Unreserve_All_Interrupts = 0 then - Result := - sigaction - (Signal (Exception_Interrupts (J)), - act'Unchecked_Access, - old_act'Unchecked_Access); - pragma Assert (Result = 0); - end if; - end loop; - - Keep_Unmasked (Abort_Task_Interrupt) := True; - Keep_Unmasked (SIGXCPU) := True; - Keep_Unmasked (SIGBUS) := True; - Keep_Unmasked (SIGFPE) := True; - - -- By keeping SIGINT unmasked, allow the user to do a Ctrl-C, but in the - -- same time, disable the ability of handling this signal - -- via Ada.Interrupts. - -- The pragma Unreserve_All_Interrupts let the user the ability to - -- change this behavior. - - if Unreserve_All_Interrupts = 0 then - Keep_Unmasked (SIGINT) := True; - end if; - - for J in Unmasked'Range loop - Keep_Unmasked (Interrupt_ID (Unmasked (J))) := True; - end loop; - - Reserve := Keep_Unmasked or Keep_Masked; - - for J in Reserved'Range loop - Reserve (Interrupt_ID (Reserved (J))) := True; - end loop; - - Reserve (0) := True; - -- We do not have Signal 0 in reality. We just use this value - -- to identify non-existent signals (see s-intnam.ads). Therefore, - -- Signal 0 should not be used in all signal related operations hence - -- mark it as reserved. - - end; -end System.Interrupt_Management;