3 * Copyright (C) 2000 ReactOS Team
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * PROJECT: ReactOS kernel
22 * FILE: ntoskrnl/ke/catch.c
23 * PURPOSE: Exception handling
24 * PROGRAMMER: David Welch (welch@mcmail.com)
25 * Casper S. Hornstrup (chorns@users.sourceforge.net)
28 /* INCLUDES *****************************************************************/
30 #include <ddk/ntddk.h>
31 #include <reactos/bugcodes.h>
33 #include <internal/ke.h>
34 #include <internal/ldr.h>
35 #include <internal/ps.h>
36 #include <internal/kd.h>
39 #include <internal/debug.h>
41 /* FUNCTIONS ****************************************************************/
44 RtlpDispatchException(IN PEXCEPTION_RECORD ExceptionRecord,
48 KiDispatchException(PEXCEPTION_RECORD ExceptionRecord,
51 KPROCESSOR_MODE PreviousMode,
54 EXCEPTION_DISPOSITION Value;
56 KD_CONTINUE_TYPE Action = kdContinue;
58 DPRINT("KiDispatchException() called\n");
60 /* PCR->KeExceptionDispatchCount++; */
64 TContext.ContextFlags = CONTEXT_FULL;
65 if (PreviousMode == UserMode)
67 TContext.ContextFlags = TContext.ContextFlags | CONTEXT_DEBUGGER;
70 KeTrapFrameToContext(Tf, &TContext);
76 if (ExceptionRecord->ExceptionCode == STATUS_BREAKPOINT)
82 if (KdDebuggerEnabled && KdDebugState & KD_DEBUG_GDB)
84 Action = KdEnterDebuggerException (ExceptionRecord, Context, Tf);
87 else if (KdDebuggerEnabled && KdDebugState & KD_DEBUG_KDB)
89 Action = KdbEnterDebuggerException (ExceptionRecord, Context, Tf);
92 if (Action != kdHandleException)
94 if (PreviousMode == UserMode)
101 /* FIXME: Forward exception to user mode debugger */
103 /* FIXME: Check user mode stack for enough space */
106 * Let usermode try and handle the exception
109 (12 + sizeof(EXCEPTION_RECORD) + sizeof(CONTEXT));
110 Stack = (PULONG)Tf->Esp;
111 CDest = 3 + (ROUND_UP(sizeof(EXCEPTION_RECORD), 4) / 4);
114 /* Pointer to EXCEPTION_RECORD structure */
115 Stack[1] = (ULONG)&Stack[3];
116 /* Pointer to CONTEXT structure */
117 Stack[2] = (ULONG)&Stack[CDest];
118 memcpy(&Stack[3], ExceptionRecord, sizeof(EXCEPTION_RECORD));
119 memcpy(&Stack[CDest], Context, sizeof(CONTEXT));
121 Tf->Eip = (ULONG)LdrpGetSystemDllExceptionDispatcher();
125 /* FIXME: Forward the exception to the debugger */
127 /* FIXME: Forward the exception to the process exception port */
129 /* Terminate the offending thread */
130 DPRINT1("Unhandled UserMode exception, terminating thread\n");
131 ZwTerminateThread(NtCurrentThread(), ExceptionRecord->ExceptionCode);
133 /* If that fails then bugcheck */
134 DPRINT1("Could not terminate thread\n");
135 KeBugCheck(KMODE_EXCEPTION_NOT_HANDLED);
139 /* PreviousMode == KernelMode */
140 Value = RtlpDispatchException (ExceptionRecord, Context);
142 DPRINT("RtlpDispatchException() returned with 0x%X\n", Value);
144 * If RtlpDispatchException() does not handle the exception then
147 if (Value != ExceptionContinueExecution ||
148 0 != (ExceptionRecord->ExceptionFlags & EXCEPTION_NONCONTINUABLE))
150 KeBugCheckWithTf(KMODE_EXCEPTION_NOT_HANDLED, 0, 0, 0, 0, Tf);
156 KeContextToTrapFrame (Context, KeGetCurrentThread()->TrapFrame);
161 ExRaiseAccessViolation (VOID)
163 ExRaiseStatus (STATUS_ACCESS_VIOLATION);
167 ExRaiseDatatypeMisalignment (VOID)
169 ExRaiseStatus (STATUS_DATATYPE_MISALIGNMENT);
173 ExRaiseStatus (IN NTSTATUS Status)
175 EXCEPTION_RECORD ExceptionRecord;
177 DPRINT("ExRaiseStatus(%x)\n", Status);
179 ExceptionRecord.ExceptionRecord = NULL;
180 ExceptionRecord.NumberParameters = 0;
181 ExceptionRecord.ExceptionCode = Status;
182 ExceptionRecord.ExceptionFlags = 0;
184 RtlRaiseException(&ExceptionRecord);
189 NtRaiseException (IN PEXCEPTION_RECORD ExceptionRecord,
191 IN BOOLEAN SearchFrames)
193 KiDispatchException(ExceptionRecord,
195 PsGetCurrentThread()->Tcb.TrapFrame,
198 return(STATUS_SUCCESS);
203 RtlRaiseException(PEXCEPTION_RECORD ExceptionRecord)
205 ZwRaiseException(ExceptionRecord, NULL, TRUE);