示例#1
0
        public static unsafe void Throw(FOS_System.Exception ex)
        {
            Kernel.FOS_System.GC.IncrementRefCount(ex);

            //BasicConsole.WriteLine("Exception thrown:");
            //BasicConsole.WriteLine(ex.Message);

            if (State->CurrentHandlerPtr->Ex != null)
            {
                //GC ref count remains consistent because the Ex pointer below is going to be replaced but
                //  same pointer stored in InnerException.
                // Result is ref count goes: +1 here, -1 below
                ex.InnerException = (Kernel.FOS_System.Exception)Utilities.ObjectUtilities.GetObject(State->CurrentHandlerPtr->Ex);
            }
            if (ex.InstructionAddress == 0)
            {
                ex.InstructionAddress = *((uint *)BasePointer + 1);
            }
            State->CurrentHandlerPtr->Ex        = Utilities.ObjectUtilities.GetHandle(ex);
            State->CurrentHandlerPtr->ExPending = 1;

            HandleException();

            // We never expect to get here...
            HaltReason = "HandleException returned!";
            BasicConsole.WriteLine(HaltReason);
            // Try to cause fault
            *((byte *)0x800000000) = 0;
        }
示例#2
0
 /// <summary>
 /// Throws a stack exception.
 /// </summary>
 /// <remarks>
 /// Used by CPU interrupts to handle the creation of the exception object and calling Throw.
 /// </remarks>
 public static void Throw_StackException()
 {
     HaltReason = "Stack exception.";
     BasicConsole.SetTextColour(BasicConsole.error_colour);
     BasicConsole.WriteLine(HaltReason);
     BasicConsole.SetTextColour(BasicConsole.default_colour);
     Throw(new FOS_System.Exceptions.StackException());
 }
示例#3
0
 /// <summary>
 /// Throws an invalid op code exception.
 /// </summary>
 /// <remarks>
 /// Used by CPU interrupts to handle the creation of the exception object and calling Throw.
 /// </remarks>
 public static void Throw_InvalidOpCodeException()
 {
     HaltReason = "Invalid op code exception.";
     BasicConsole.SetTextColour(BasicConsole.error_colour);
     BasicConsole.WriteLine(HaltReason);
     BasicConsole.SetTextColour(BasicConsole.default_colour);
     Throw(new FOS_System.Exceptions.InvalidOpCodeException());
 }
示例#4
0
 /// <summary>
 /// Throws an overflow exception.
 /// </summary>
 /// <remarks>
 /// Used by CPU interrupts to handle the creation of the exception object and calling Throw.
 /// </remarks>
 public static void Throw_OverflowException()
 {
     HaltReason = "Overflow exception.";
     BasicConsole.SetTextColour(BasicConsole.error_colour);
     BasicConsole.WriteLine(HaltReason);
     BasicConsole.SetTextColour(BasicConsole.default_colour);
     Throw(new FOS_System.Exceptions.OverflowException("Processor reported an overflow."));
 }
示例#5
0
 /// <summary>
 /// Throws a divide by zero exception storing the specified exception address.
 /// </summary>
 /// <param name="address">The address of the code that caused the exception.</param>
 /// <remarks>
 /// Used by CPU interrupts to handle the creation of the exception object and calling Throw.
 /// </remarks>
 public static void Throw_DivideByZeroException(uint address)
 {
     HaltReason = "Divide by zero exception.";
     BasicConsole.SetTextColour(BasicConsole.error_colour);
     BasicConsole.WriteLine(HaltReason);
     BasicConsole.SetTextColour(BasicConsole.default_colour);
     Throw(new FOS_System.Exceptions.DivideByZeroException(address));
 }
示例#6
0
        public static unsafe void HandleException()
        {
            //BasicConsole.WriteLine("Handle exception");

            if (State != null)
            {
                if (State->CurrentHandlerPtr != null)
                {
                    if (State->CurrentHandlerPtr->InHandler != 0)
                    {
                        State->CurrentHandlerPtr->InHandler = 0;
                        if (State->CurrentHandlerPtr->PrevHandlerPtr != null)
                        {
                            State->CurrentHandlerPtr->PrevHandlerPtr->Ex        = State->CurrentHandlerPtr->Ex;
                            State->CurrentHandlerPtr->PrevHandlerPtr->ExPending = State->CurrentHandlerPtr->ExPending;
                        }
                        State->CurrentHandlerPtr = State->CurrentHandlerPtr->PrevHandlerPtr;
                        State->depth--;
                        State->history[State->history_pos++] = (uint)State->CurrentHandlerPtr->HandlerAddress;
                        if (State->history_pos > 31)
                        {
                            State->history_pos = 0;
                        }
                    }
                }

                ExceptionHandlerInfo *CurrHandlerPtr = State->CurrentHandlerPtr;
                if (CurrHandlerPtr != null)
                {
                    if ((uint)CurrHandlerPtr->HandlerAddress != 0x00000000u)
                    {
                        if ((uint)CurrHandlerPtr->FilterAddress != 0x00000000u)
                        {
                            //Catch handler
                            CurrHandlerPtr->ExPending = 0;
                        }

                        CurrHandlerPtr->InHandler = 1;

                        ArbitaryReturn(CurrHandlerPtr->EBP, CurrHandlerPtr->ESP, CurrHandlerPtr->HandlerAddress);
                    }
                }
            }

            // If we get to here, it's an unhandled exception
            HaltReason = "Unhandled / improperly handled exception!";
            BasicConsole.WriteLine(HaltReason);
            // Try to cause fault
            *((byte *)0x800000000) = 0;
        }
示例#7
0
        public static void Throw_NullReferenceException(uint address)
        {
            HaltReason = "Null reference exception. Instruction: 0x        ";
            FillString(address, 48, HaltReason);

            bool BCPOEnabled = BasicConsole.PrimaryOutputEnabled;

            BasicConsole.PrimaryOutputEnabled = true;
            BasicConsole.WriteLine(HaltReason);
            BasicConsole.DelayOutput(10);
            BasicConsole.PrimaryOutputEnabled = BCPOEnabled;

            FOS_System.Exception ex = new FOS_System.Exceptions.NullReferenceException();
            ex.InstructionAddress = address;
            Throw(ex);
        }
示例#8
0
        public static void PrintStackTrace()
        {
            uint *EBP = (uint *)BasePointer;

            while ((uint)EBP % 4096 != 0)
            {
                FOS_System.String msg = "EBP: 0x        , Return Address: 0x        , Prev EBP: 0x        ";
                //EBP: 14
                //Return address: 42
                //Prev EBP: 64

                uint ReturnAddress = *(EBP + 1);
                uint PrevEBP       = *(EBP);
                FillString((uint)EBP, 14, msg);
                FillString(ReturnAddress, 42, msg);
                FillString(PrevEBP, 64, msg);
                BasicConsole.WriteLine(msg);

                EBP = (uint *)PrevEBP;
            }
        }
示例#9
0
文件: Kernel.cs 项目: zrbruce/FlingOS
        static unsafe void Main()
        {
            ExceptionMethods.AddExceptionHandlerInfo(null, null);


            try
            {
                Hardware.IO.Serial.Serial.InitCOM1();
                Hardware.IO.Serial.Serial.InitCOM2();
                Hardware.IO.Serial.Serial.InitCOM3();

                BasicConsole.SecondaryOutput        = BasicConsole_SecondaryOutput;
                BasicConsole.SecondaryOutputEnabled = true;

                Hardware.Devices.CPU.InitDefault();

                BasicConsole.WriteLine("Creating kernel process...");
                Process KernelProcess = ProcessManager.CreateProcess(Tasks.KernelTask.Main, "Kernel Task", false);
                KernelProcess.TheMemoryLayout.NoUnload = true;
                ProcessManager.KernelProcess           = KernelProcess;

                BasicConsole.WriteLine("Getting kernel thread...");
                Thread KernelThread = ((Thread)KernelProcess.Threads[0]);

                BasicConsole.WriteLine("Initialising kernel thread stack...");
                Hardware.VirtMemManager.Unmap(KernelThread.State->ThreadStackTop - 4092);
                KernelProcess.TheMemoryLayout.RemovePage((uint)KernelThread.State->ThreadStackTop - 4092);
                KernelThread.State->ThreadStackTop = GetKernelStackPtr();
                KernelThread.State->ESP            = (uint)KernelThread.State->ThreadStackTop;

                BasicConsole.WriteLine("Initialising kernel process heap...");
                KernelProcess.HeapLock = Heap.AccessLock;
                KernelProcess.HeapPtr  = Heap.FBlock;

                BasicConsole.WriteLine("Initialising kernel process GC...");
                KernelProcess.TheGCState = FOS_System.GC.State;

                BasicConsole.WriteLine("Registering kernel process...");
                ProcessManager.RegisterProcess(KernelProcess, Scheduler.Priority.Normal);

                BasicConsole.WriteLine("Initialising kernel ISRs...");
                KernelProcess.ISRHandler           = Tasks.KernelTask.HandleISR;
                KernelProcess.SwitchProcessForISRs = false;
                KernelProcess.ISRsToHandle.Set(48);

                BasicConsole.WriteLine("Initialising kernel IRQs...");
                KernelProcess.IRQHandler           = Tasks.KernelTask.HandleIRQ;
                KernelProcess.SwitchProcessForIRQs = false;
                KernelProcess.IRQsToHandle.Set(0);

                BasicConsole.WriteLine("Initialising default timer...");
                Hardware.Devices.Timer.InitDefault();



                BasicConsole.PrimaryOutputEnabled   = true;
                BasicConsole.SecondaryOutputEnabled = false;
                BasicConsole.WriteLine();
                BasicConsole.WriteLine();
                BasicConsole.WriteLine(TextSplashScreen);

                BasicConsole.SecondaryOutputEnabled = true;
                BasicConsole.PrimaryOutputEnabled   = false;

                for (int i = 0; i < TextSplashScreen.length; i += 80)
                {
                    TextSplashScreen[i] = '\n';
                }
                BasicConsole.WriteLine(TextSplashScreen);

                BasicConsole.PrimaryOutputEnabled   = true;
                BasicConsole.SecondaryOutputEnabled = true;

                for (int i = 0; i < 37; i++)
                {
                    BasicConsole.Write(' ');
                }
                char num = '1';
                for (int i = 0; i < 3; i++)
                {
                    BasicConsole.Write(num++);
                    Hardware.Devices.Timer.Default.Wait(1000);
                    BasicConsole.Write(' ');
                }
                BasicConsole.WriteLine();

                BasicConsole.WriteLine("FlingOS(TM)");
                BasicConsole.WriteLine("Copyright (C) 2014-15 Edward Nutting");
                BasicConsole.WriteLine("This program comes with ABSOLUTELY NO WARRANTY;.");
                BasicConsole.WriteLine("This is free software, and you are welcome to redistribute it");
                BasicConsole.WriteLine("under certain conditions; See GPL V2 for details, a copy of");
                BasicConsole.WriteLine("which should have been provided with the executable.");

                BasicConsole.WriteLine("Fling OS Running...");
                BasicConsole.WriteLine();

#if MIPS
                BasicConsole.WriteLine("MIPS Kernel");
#elif x86 || AnyCPU
                BasicConsole.WriteLine("x86 Kernel");
#endif
                BasicConsole.WriteLine();

                //uint bpm = 140;
                //Hardware.Timers.PIT.ThePIT.PlayNote(
                //    Hardware.Timers.PIT.MusicalNote.C4,
                //    Hardware.Timers.PIT.MusicalNoteValue.Quaver,
                //    bpm);
                //Hardware.Timers.PIT.ThePIT.PlayNote(
                //    Hardware.Timers.PIT.MusicalNote.Silent,
                //    Hardware.Timers.PIT.MusicalNoteValue.Minim,
                //    bpm);
                //Hardware.Timers.PIT.ThePIT.PlayNote(
                //    Hardware.Timers.PIT.MusicalNote.E4,
                //    Hardware.Timers.PIT.MusicalNoteValue.Quaver,
                //    bpm);
                //Hardware.Timers.PIT.ThePIT.PlayNote(
                //    Hardware.Timers.PIT.MusicalNote.Silent,
                //    Hardware.Timers.PIT.MusicalNoteValue.Minim,
                //    bpm);
                //Hardware.Timers.PIT.ThePIT.PlayNote(
                //    Hardware.Timers.PIT.MusicalNote.G4,
                //    Hardware.Timers.PIT.MusicalNoteValue.Quaver,
                //    bpm);
                //Hardware.Timers.PIT.ThePIT.PlayNote(
                //    Hardware.Timers.PIT.MusicalNote.Silent,
                //    Hardware.Timers.PIT.MusicalNoteValue.Minim,
                //    bpm);
                //Hardware.Timers.PIT.ThePIT.PlayNote(
                //    Hardware.Timers.PIT.MusicalNote.C5,
                //    Hardware.Timers.PIT.MusicalNoteValue.Minim,
                //    bpm);
                //Hardware.Timers.PIT.ThePIT.PlayNote(
                //    Hardware.Timers.PIT.MusicalNote.Silent,
                //    Hardware.Timers.PIT.MusicalNoteValue.Minim,
                //    bpm);
                //Hardware.Timers.PIT.ThePIT.PlayNote(
                //    Hardware.Timers.PIT.MusicalNote.G4,
                //    Hardware.Timers.PIT.MusicalNoteValue.Minim,
                //    bpm);
                //Hardware.Timers.PIT.ThePIT.PlayNote(
                //    Hardware.Timers.PIT.MusicalNote.C5,
                //    Hardware.Timers.PIT.MusicalNoteValue.Minim,
                //    bpm);

                BasicConsole.WriteLine("Initialising scheduler...");
                Scheduler.Init();

                // Busy wait until the scheduler interrupts us.
                while (true)
                {
                    ;
                }
                // We will never return to this point since there is no way for the scheduler to point
                //  to it.
            }
            catch
            {
                BasicConsole.SetTextColour(BasicConsole.error_colour);
                if (ExceptionMethods.CurrentException is FOS_System.Exceptions.PageFaultException)
                {
                    BasicConsole.WriteLine("Page fault exception unhandled!");
                }
                else
                {
                    BasicConsole.WriteLine("Startup error! " + ExceptionMethods.CurrentException.Message);
                }
                BasicConsole.WriteLine("FlingOS forced to halt!");
                BasicConsole.SetTextColour(BasicConsole.default_colour);
            }

            BasicConsole.WriteLine("Fling OS Ended.");

            //Necessary - no way of returning from this method since add exception info
            //            at start cannot be "undone" so stack is "corrupted" if we try
            //            to "ret"
            //So we just halt the CPU for want of a better solution later when ACPI is
            //implemented.
            ExceptionMethods.HaltReason = "End of Main";
            Halt(0xFFFFFFFF);
            //TODO: Proper shutdown method
        }
示例#10
0
文件: Kernel.cs 项目: zrbruce/FlingOS
 static Kernel()
 {
     BasicConsole.Init();
     BasicConsole.Clear();
 }
示例#11
0
文件: Kernel.cs 项目: zrbruce/FlingOS
        public static void Halt(uint lastAddress)
        {
            BasicConsole.PrimaryOutputEnabled = true;

            try
            {
                Hardware.Devices.Keyboard.CleanDefault();
                Hardware.Devices.Timer.CleanDefault();
            }
            catch
            {
            }

            BasicConsole.SetTextColour(BasicConsole.warning_colour);
            BasicConsole.Write("Halt Reason: ");
            BasicConsole.WriteLine(ExceptionMethods.HaltReason);

            FOS_System.String LastAddressStr = "Last address: 0x        ";
            uint y      = lastAddress;
            int  offset = 23;

            #region Address
            while (offset > 15)
            {
                uint rem = y & 0xFu;
                switch (rem)
                {
                case 0:
                    LastAddressStr[offset] = '0';
                    break;

                case 1:
                    LastAddressStr[offset] = '1';
                    break;

                case 2:
                    LastAddressStr[offset] = '2';
                    break;

                case 3:
                    LastAddressStr[offset] = '3';
                    break;

                case 4:
                    LastAddressStr[offset] = '4';
                    break;

                case 5:
                    LastAddressStr[offset] = '5';
                    break;

                case 6:
                    LastAddressStr[offset] = '6';
                    break;

                case 7:
                    LastAddressStr[offset] = '7';
                    break;

                case 8:
                    LastAddressStr[offset] = '8';
                    break;

                case 9:
                    LastAddressStr[offset] = '9';
                    break;

                case 10:
                    LastAddressStr[offset] = 'A';
                    break;

                case 11:
                    LastAddressStr[offset] = 'B';
                    break;

                case 12:
                    LastAddressStr[offset] = 'C';
                    break;

                case 13:
                    LastAddressStr[offset] = 'D';
                    break;

                case 14:
                    LastAddressStr[offset] = 'E';
                    break;

                case 15:
                    LastAddressStr[offset] = 'F';
                    break;
                }
                y >>= 4;
                offset--;
            }

            #endregion
            BasicConsole.WriteLine(LastAddressStr);

            BasicConsole.SetTextColour(BasicConsole.default_colour);

            if (ExceptionMethods.CurrentException != null)
            {
                BasicConsole.SetTextColour(BasicConsole.error_colour);
                BasicConsole.WriteLine(ExceptionMethods.CurrentException.Message);
                if (ExceptionMethods.CurrentException is FOS_System.Exceptions.PageFaultException)
                {
                    BasicConsole.Write("Address: ");
                    BasicConsole.WriteLine(((FOS_System.Exceptions.PageFaultException)ExceptionMethods.CurrentException).address);
                    BasicConsole.Write("Code: ");
                    BasicConsole.WriteLine(((FOS_System.Exceptions.PageFaultException)ExceptionMethods.CurrentException).errorCode);
                }
                else if (ExceptionMethods.CurrentException is FOS_System.Exceptions.DoubleFaultException)
                {
                    BasicConsole.Write("Code: ");
                    BasicConsole.WriteLine(((FOS_System.Exceptions.DoubleFaultException)ExceptionMethods.CurrentException).ErrorCode);
                }
                BasicConsole.SetTextColour(BasicConsole.default_colour);
            }

            BasicConsole.SetTextColour(BasicConsole.error_colour);
            BasicConsole.WriteLine("Kernel halting!");
            BasicConsole.SetTextColour(BasicConsole.default_colour);
            PreReqs.Reset();
        }
示例#12
0
        public static unsafe void AddExceptionHandlerInfo(
            void *handlerPtr,
            void *filterPtr)
        {
            if (State == null)
            {
                BasicConsole.SetTextColour(BasicConsole.error_colour);
                BasicConsole.WriteLine("Error! ExceptionMethods.State is null.");
                BasicConsole.DelayOutput(10);
                BasicConsole.SetTextColour(BasicConsole.default_colour);
            }

            State->depth++;

            //if (filterPtr != null)
            //{
            //    BasicConsole.WriteLine("Enter try-catch block");
            //}
            //else
            //{
            //    BasicConsole.WriteLine("Enter try-finally block");
            //}

            AddExceptionHandlerInfo_EntryStackState *BasePtr = (AddExceptionHandlerInfo_EntryStackState *)BasePointer;

            uint LocalsSize = (uint)BasePtr - (uint)StackPointer;

            // Create space for setting up handler info
            StackPointer -= sizeof(ExceptionHandlerInfo);

            // Setup handler info
            ExceptionHandlerInfo *ExHndlrPtr = (ExceptionHandlerInfo *)StackPointer;

            ExHndlrPtr->EBP = BasePtr->EBP;
            //                  EBP + 8 (for ret addr, ebp) + 8 (for args) - sizeof(ExceptionHandlerInfo)
            ExHndlrPtr->ESP            = (uint)BasePtr + 8 + 8 - (uint)sizeof(ExceptionHandlerInfo);
            ExHndlrPtr->FilterAddress  = (byte *)filterPtr;
            ExHndlrPtr->HandlerAddress = (byte *)handlerPtr;
            ExHndlrPtr->PrevHandlerPtr = State->CurrentHandlerPtr;
            ExHndlrPtr->InHandler      = 0;
            ExHndlrPtr->ExPending      = 0;
            ExHndlrPtr->Ex             = null;

            State->CurrentHandlerPtr = (ExceptionHandlerInfo *)((byte *)ExHndlrPtr + (LocalsSize + 12));

            StackPointer -= 8; // For duplicate (empty) args
            StackPointer -= 8; // For duplicate ebp, ret addr

            // Setup the duplicate stack data
            //  - Nothing to do for args - duplicate values don't matter
            //  - Copy over ebp and return address
            uint *DuplicateValsStackPointer = (uint *)StackPointer;

            *DuplicateValsStackPointer = BasePtr->EBP;
            *(DuplicateValsStackPointer + 1) = BasePtr->RetAddr;

            ShiftStack((byte *)ExHndlrPtr + sizeof(ExceptionHandlerInfo) - 4, LocalsSize + 12);

            // Shift stack pointer to correct position - eliminates "empty space" of duplicates
            StackPointer += 16;

            // MethodEnd will:
            //      - Add size of locals to esp
            //      - Pop EBP
            //      - Ret to ret address
            // Caller will:
            //      - Add size of args to esp
            // Which should leave the stack at the bottom of the (shifted up) ex handler info
        }
示例#13
0
        /// <summary>
        /// Throws a page fault exception.
        /// </summary>
        /// <param name="errorCode">The error code associated with the page fault.</param>
        /// <param name="address">The address which caused the fault.</param>
        /// <remarks>
        /// Used by CPU interrupts to handle the creation of the exception object and calling Throw.
        /// </remarks>
        public static void Throw_PageFaultException(uint eip, uint errorCode, uint address)
        {
            if (ThePageFaultHandler != null)
            {
                ThePageFaultHandler(eip, errorCode, address);
            }
            else
            {
                BasicConsole.SetTextColour(BasicConsole.error_colour);
                BasicConsole.WriteLine("Page fault exception!");
                BasicConsole.DelayOutput(10);

                HaltReason = "Page fault exception. Address: 0x        , errorCode: 0x        , eip: 0x        ";

                uint y      = address;
                int  offset = 40;
                #region Address
                while (offset > 32)
                {
                    uint rem = y & 0xFu;
                    switch (rem)
                    {
                    case 0:
                        HaltReason[offset] = '0';
                        break;

                    case 1:
                        HaltReason[offset] = '1';
                        break;

                    case 2:
                        HaltReason[offset] = '2';
                        break;

                    case 3:
                        HaltReason[offset] = '3';
                        break;

                    case 4:
                        HaltReason[offset] = '4';
                        break;

                    case 5:
                        HaltReason[offset] = '5';
                        break;

                    case 6:
                        HaltReason[offset] = '6';
                        break;

                    case 7:
                        HaltReason[offset] = '7';
                        break;

                    case 8:
                        HaltReason[offset] = '8';
                        break;

                    case 9:
                        HaltReason[offset] = '9';
                        break;

                    case 10:
                        HaltReason[offset] = 'A';
                        break;

                    case 11:
                        HaltReason[offset] = 'B';
                        break;

                    case 12:
                        HaltReason[offset] = 'C';
                        break;

                    case 13:
                        HaltReason[offset] = 'D';
                        break;

                    case 14:
                        HaltReason[offset] = 'E';
                        break;

                    case 15:
                        HaltReason[offset] = 'F';
                        break;
                    }
                    y >>= 4;
                    offset--;
                }

                #endregion

                y      = errorCode;
                offset = 63;
                #region Error Code

                while (offset > 55)
                {
                    uint rem = y & 0xFu;
                    switch (rem)
                    {
                    case 0:
                        HaltReason[offset] = '0';
                        break;

                    case 1:
                        HaltReason[offset] = '1';
                        break;

                    case 2:
                        HaltReason[offset] = '2';
                        break;

                    case 3:
                        HaltReason[offset] = '3';
                        break;

                    case 4:
                        HaltReason[offset] = '4';
                        break;

                    case 5:
                        HaltReason[offset] = '5';
                        break;

                    case 6:
                        HaltReason[offset] = '6';
                        break;

                    case 7:
                        HaltReason[offset] = '7';
                        break;

                    case 8:
                        HaltReason[offset] = '8';
                        break;

                    case 9:
                        HaltReason[offset] = '9';
                        break;

                    case 10:
                        HaltReason[offset] = 'A';
                        break;

                    case 11:
                        HaltReason[offset] = 'B';
                        break;

                    case 12:
                        HaltReason[offset] = 'C';
                        break;

                    case 13:
                        HaltReason[offset] = 'D';
                        break;

                    case 14:
                        HaltReason[offset] = 'E';
                        break;

                    case 15:
                        HaltReason[offset] = 'F';
                        break;
                    }
                    y >>= 4;
                    offset--;
                }

                #endregion

                y      = eip;
                offset = 80;
                #region EIP

                while (offset > 72)
                {
                    uint rem = y & 0xFu;
                    switch (rem)
                    {
                    case 0:
                        HaltReason[offset] = '0';
                        break;

                    case 1:
                        HaltReason[offset] = '1';
                        break;

                    case 2:
                        HaltReason[offset] = '2';
                        break;

                    case 3:
                        HaltReason[offset] = '3';
                        break;

                    case 4:
                        HaltReason[offset] = '4';
                        break;

                    case 5:
                        HaltReason[offset] = '5';
                        break;

                    case 6:
                        HaltReason[offset] = '6';
                        break;

                    case 7:
                        HaltReason[offset] = '7';
                        break;

                    case 8:
                        HaltReason[offset] = '8';
                        break;

                    case 9:
                        HaltReason[offset] = '9';
                        break;

                    case 10:
                        HaltReason[offset] = 'A';
                        break;

                    case 11:
                        HaltReason[offset] = 'B';
                        break;

                    case 12:
                        HaltReason[offset] = 'C';
                        break;

                    case 13:
                        HaltReason[offset] = 'D';
                        break;

                    case 14:
                        HaltReason[offset] = 'E';
                        break;

                    case 15:
                        HaltReason[offset] = 'F';
                        break;
                    }
                    y >>= 4;
                    offset--;
                }

                #endregion

                BasicConsole.WriteLine(HaltReason);
                BasicConsole.SetTextColour(BasicConsole.default_colour);

                Throw(new FOS_System.Exceptions.PageFaultException(errorCode, address));
            }
        }
示例#14
0
        /// <summary>
        /// Throws a double fault exception.
        /// </summary>
        /// <remarks>
        /// Used by CPU interrupts to handle the creation of the exception object and calling Throw.
        /// </remarks>
        public static void Throw_DoubleFaultException(uint address, uint errorCode)
        {
            HaltReason = "Double fault exception. Address: 0x         Error code: 0x        ";

            uint y      = address;
            int  offset = 42;

            #region Address
            while (offset > 34)
            {
                uint rem = y & 0xFu;
                switch (rem)
                {
                case 0:
                    HaltReason[offset] = '0';
                    break;

                case 1:
                    HaltReason[offset] = '1';
                    break;

                case 2:
                    HaltReason[offset] = '2';
                    break;

                case 3:
                    HaltReason[offset] = '3';
                    break;

                case 4:
                    HaltReason[offset] = '4';
                    break;

                case 5:
                    HaltReason[offset] = '5';
                    break;

                case 6:
                    HaltReason[offset] = '6';
                    break;

                case 7:
                    HaltReason[offset] = '7';
                    break;

                case 8:
                    HaltReason[offset] = '8';
                    break;

                case 9:
                    HaltReason[offset] = '9';
                    break;

                case 10:
                    HaltReason[offset] = 'A';
                    break;

                case 11:
                    HaltReason[offset] = 'B';
                    break;

                case 12:
                    HaltReason[offset] = 'C';
                    break;

                case 13:
                    HaltReason[offset] = 'D';
                    break;

                case 14:
                    HaltReason[offset] = 'E';
                    break;

                case 15:
                    HaltReason[offset] = 'F';
                    break;
                }
                y >>= 4;
                offset--;
            }

            #endregion

            y      = errorCode;
            offset = 65;
            #region Error Code
            while (offset > 57)
            {
                uint rem = y & 0xFu;
                switch (rem)
                {
                case 0:
                    HaltReason[offset] = '0';
                    break;

                case 1:
                    HaltReason[offset] = '1';
                    break;

                case 2:
                    HaltReason[offset] = '2';
                    break;

                case 3:
                    HaltReason[offset] = '3';
                    break;

                case 4:
                    HaltReason[offset] = '4';
                    break;

                case 5:
                    HaltReason[offset] = '5';
                    break;

                case 6:
                    HaltReason[offset] = '6';
                    break;

                case 7:
                    HaltReason[offset] = '7';
                    break;

                case 8:
                    HaltReason[offset] = '8';
                    break;

                case 9:
                    HaltReason[offset] = '9';
                    break;

                case 10:
                    HaltReason[offset] = 'A';
                    break;

                case 11:
                    HaltReason[offset] = 'B';
                    break;

                case 12:
                    HaltReason[offset] = 'C';
                    break;

                case 13:
                    HaltReason[offset] = 'D';
                    break;

                case 14:
                    HaltReason[offset] = 'E';
                    break;

                case 15:
                    HaltReason[offset] = 'F';
                    break;
                }
                y >>= 4;
                offset--;
            }

            #endregion

            BasicConsole.SetTextColour(BasicConsole.error_colour);
            BasicConsole.WriteLine(HaltReason);
            BasicConsole.SetTextColour(BasicConsole.default_colour);
            Throw(new FOS_System.Exceptions.DoubleFaultException(errorCode));
        }
示例#15
0
        public static unsafe void HandleEndFinally()
        {
            if (State == null ||
                State->CurrentHandlerPtr == null)
            {
                // If we get to here, it's an unhandled exception
                if (State == null)
                {
                    HaltReason = "Cannot end finally in null state!";
                }
                else if (State->CurrentHandlerPtr == null)
                {
                    HaltReason = "Cannot end finally on null handler!";
                }
                else
                {
                    HaltReason = "Cannot end finally for unexpected reason!";
                }
                BasicConsole.WriteLine(HaltReason);
                BasicConsole.DelayOutput(5);

                // Try to cause fault
                *((byte *)0x800000000) = 0;
            }

            // Leaving a "finally" critical section cleanly
            // We need to handle 2 cases:
            // Case 1 : Pending exception
            // Case 2 : No pending exception

            //BasicConsole.WriteLine("Handle end finally");

            if (State->CurrentHandlerPtr->ExPending != 0)
            {
                // Case 1 : Pending exception

                HandleException();
            }
            else
            {
                // Case 2 : No pending exception

                State->CurrentHandlerPtr->InHandler = 0;

                uint  EBP     = State->CurrentHandlerPtr->EBP;
                uint  ESP     = State->CurrentHandlerPtr->ESP;
                byte *retAddr = State->CurrentHandlerPtr->HandlerAddress;//(byte*)*((uint*)(BasePointer + 4));

                //BasicConsole.Write("Continue ptr (from HandlerAddress): ");
                //BasicConsole.WriteLine((uint)State->CurrentHandlerPtr->HandlerAddress);
                //BasicConsole.Write("Actual continue addr (from EBP): ");
                //BasicConsole.WriteLine(*((uint*)(BasePointer + 4)));

                State->CurrentHandlerPtr = State->CurrentHandlerPtr->PrevHandlerPtr;
                State->depth--;
                State->history[State->history_pos++] = (uint)State->CurrentHandlerPtr->HandlerAddress;
                if (State->history_pos > 31)
                {
                    State->history_pos = 0;
                }

                ArbitaryReturn(EBP,
                               ESP + (uint)sizeof(ExceptionHandlerInfo),
                               retAddr);
            }
        }
示例#16
0
        public static unsafe void HandleLeave(void *continuePtr)
        {
            if (State == null ||
                State->CurrentHandlerPtr == null)
            {
                // If we get to here, it's an unhandled exception
                HaltReason = "";
                if (State == null)
                {
                    HaltReason = "Cannot leave on null handler! Address: 0x         - Null state";
                }
                else if (State->CurrentHandlerPtr == null)
                {
                    HaltReason = "Cannot leave on null handler! Address: 0x         - Null handler";
                }
                else
                {
                    HaltReason = "Cannot leave on null handler! Address: 0x         - Unexpected reason";
                }


                uint y      = *((uint *)(BasePointer + 4));
                int  offset = 48;
                #region Address
                while (offset > 40)
                {
                    uint rem = y & 0xFu;
                    switch (rem)
                    {
                    case 0:
                        HaltReason[offset] = '0';
                        break;

                    case 1:
                        HaltReason[offset] = '1';
                        break;

                    case 2:
                        HaltReason[offset] = '2';
                        break;

                    case 3:
                        HaltReason[offset] = '3';
                        break;

                    case 4:
                        HaltReason[offset] = '4';
                        break;

                    case 5:
                        HaltReason[offset] = '5';
                        break;

                    case 6:
                        HaltReason[offset] = '6';
                        break;

                    case 7:
                        HaltReason[offset] = '7';
                        break;

                    case 8:
                        HaltReason[offset] = '8';
                        break;

                    case 9:
                        HaltReason[offset] = '9';
                        break;

                    case 10:
                        HaltReason[offset] = 'A';
                        break;

                    case 11:
                        HaltReason[offset] = 'B';
                        break;

                    case 12:
                        HaltReason[offset] = 'C';
                        break;

                    case 13:
                        HaltReason[offset] = 'D';
                        break;

                    case 14:
                        HaltReason[offset] = 'E';
                        break;

                    case 15:
                        HaltReason[offset] = 'F';
                        break;
                    }
                    y >>= 4;
                    offset--;
                }

                #endregion

                BasicConsole.WriteLine(HaltReason);

                if (State != null)
                {
                    if (State->depth > 0)
                    {
                        BasicConsole.WriteLine("    -- Positive depth");
                    }
                    else if (State->depth == 0)
                    {
                        BasicConsole.WriteLine("    -- Zero depth");
                    }
                    else if (State->depth < 0)
                    {
                        BasicConsole.WriteLine("    -- Negative depth");
                    }

                    int pos = State->history_pos;
                    do
                    {
                        BasicConsole.Write(State->history[pos]);
                        BasicConsole.Write(" ");

                        pos--;
                        if (pos == -1)
                        {
                            pos = 31;
                        }
                    }while (pos != State->history_pos);
                }

                BasicConsole.DelayOutput(5);

                // Try to cause fault
                *((byte *)0x800000000) = 0;
            }

            // Leaving a critical section cleanly
            // We need to handle 2 cases:
            // Case 1 : Leaving "try" or "catch" of a try-catch
            // Case 2 : Leaving the "try" of a try-finally

            if ((uint)State->CurrentHandlerPtr->FilterAddress != 0x0u)
            {
                // Case 1 : Leaving "try" or "catch" of a try-catch
                //BasicConsole.WriteLine("Leave try or catch of try-catch");

                if (State->CurrentHandlerPtr->Ex != null)
                {
                    FOS_System.GC.DecrementRefCount((FOS_System.Object)Utilities.ObjectUtilities.GetObject(State->CurrentHandlerPtr->Ex));
                    State->CurrentHandlerPtr->Ex = null;
                }

                State->CurrentHandlerPtr->InHandler = 0;

                uint EBP = State->CurrentHandlerPtr->EBP;
                uint ESP = State->CurrentHandlerPtr->ESP;

                State->CurrentHandlerPtr = State->CurrentHandlerPtr->PrevHandlerPtr;
                State->depth--;
                State->history[State->history_pos++] = (uint)State->CurrentHandlerPtr->HandlerAddress;
                if (State->history_pos > 31)
                {
                    State->history_pos = 0;
                }

                ArbitaryReturn(EBP, ESP + (uint)sizeof(ExceptionHandlerInfo), (byte *)continuePtr);
            }
            else
            {
                // Case 2 : Leaving the "try" of a try-finally

                State->CurrentHandlerPtr->InHandler = 1;

                byte *handlerAddress = State->CurrentHandlerPtr->HandlerAddress;

                //BasicConsole.WriteLine("Leave try of try-finally");
                //BasicConsole.Write("Handler address: ");
                //BasicConsole.WriteLine((uint)handlerAddress);
                //BasicConsole.Write("Continue ptr: ");
                //BasicConsole.WriteLine((uint)continuePtr);

                State->CurrentHandlerPtr->HandlerAddress = (byte *)continuePtr;

                ArbitaryReturn(State->CurrentHandlerPtr->EBP,
                               State->CurrentHandlerPtr->ESP,
                               handlerAddress);
            }
        }