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Diffstat (limited to 'gcc/ada/5lintman.adb')
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diff --git a/gcc/ada/5lintman.adb b/gcc/ada/5lintman.adb deleted file mode 100644 index 56871f3d9ec..00000000000 --- a/gcc/ada/5lintman.adb +++ /dev/null @@ -1,401 +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 -- --- -- --- Copyright (C) 1991-1994, Florida State University -- --- Copyright (C) 1995-2003, Ada Core Technologies -- --- -- --- 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. -- --- Extensive contributions were provided by Ada Core Technologies, Inc. -- --- -- ------------------------------------------------------------------------------- - --- 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 -- - ---------------------- - - pragma Warnings (Off); - -- Because many unaccessed arguments - - 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 - pragma Warnings (On); - - 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 explicitely - - 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; - - function State (Int : Interrupt_ID) return Character; - pragma Import (C, State, "__gnat_get_interrupt_state"); - -- Get interrupt state. Defined in a-init.c - -- The input argument is the interrupt number, - -- and the result is one of the following: - - User : constant Character := 'u'; - Runtime : constant Character := 'r'; - Default : constant Character := 's'; - -- 'n' this interrupt not set by any Interrupt_State pragma - -- 'u' Interrupt_State pragma set state to User - -- 'r' Interrupt_State pragma set state to Runtime - -- 's' Interrupt_State pragma set state to System (use "default" - -- system handler) - - 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 explicitely - -- the mask in the exception handler. - - Result := sigemptyset (Signal_Mask'Access); - pragma Assert (Result = 0); - - -- Add signals that map to Ada exceptions to the mask. - - for J in Exception_Interrupts'Range loop - if State (Exception_Interrupts (J)) /= Default then - Result := - sigaddset (Signal_Mask'Access, Signal (Exception_Interrupts (J))); - pragma Assert (Result = 0); - end if; - end loop; - - act.sa_mask := Signal_Mask; - - pragma Assert (Keep_Unmasked = (Interrupt_ID'Range => False)); - pragma Assert (Reserve = (Interrupt_ID'Range => False)); - - -- Process state of exception signals - - for J in Exception_Interrupts'Range loop - if State (Exception_Interrupts (J)) /= User then - Keep_Unmasked (Exception_Interrupts (J)) := True; - Reserve (Exception_Interrupts (J)) := True; - - if State (Exception_Interrupts (J)) /= Default then - Result := - sigaction - (Signal (Exception_Interrupts (J)), act'Unchecked_Access, - old_act'Unchecked_Access); - pragma Assert (Result = 0); - end if; - end if; - end loop; - - if State (Abort_Task_Interrupt) /= User then - Keep_Unmasked (Abort_Task_Interrupt) := True; - Reserve (Abort_Task_Interrupt) := True; - end if; - - -- Set SIGINT to unmasked state as long as it's - -- not in "User" state. Check for Unreserve_All_Interrupts last - - if State (SIGINT) /= User then - Keep_Unmasked (SIGINT) := True; - Reserve (SIGINT) := True; - end if; - - -- Check all signals for state that requires keeping them - -- unmasked and reserved - - for J in Interrupt_ID'Range loop - if State (J) = Default or else State (J) = Runtime then - Keep_Unmasked (J) := True; - Reserve (J) := True; - end if; - end loop; - - -- Add the set of signals that must always be unmasked for this target - - for J in Unmasked'Range loop - Keep_Unmasked (Interrupt_ID (Unmasked (J))) := True; - Reserve (Interrupt_ID (Unmasked (J))) := True; - end loop; - - -- Add target-specific reserved signals - - for J in Reserved'Range loop - Reserve (Interrupt_ID (Reserved (J))) := True; - end loop; - - -- Process pragma Unreserve_All_Interrupts. This overrides any - -- settings due to pragma Interrupt_State: - - if Unreserve_All_Interrupts /= 0 then - Keep_Unmasked (SIGINT) := False; - Reserve (SIGINT) := False; - end if; - - -- 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. - - Reserve (0) := True; - end; -end System.Interrupt_Management; |