#define NDEBUG
#include <internal/debug.h>
+/*
+ * FIXMES:
+ * - Put back VEH.
+ * - Clean up file.
+ * - Sanitize some context fields.
+ * - Add PSEH handler when an exception occurs in an exception (KiCopyExceptionRecord).
+ * - Implement official stack trace functions (exported) and remove stuff here.
+ * - Forward exceptions to user-mode debugger.
+ */
+
+VOID
+NTAPI
+Ki386AdjustEsp0(IN PKTRAP_FRAME TrapFrame);
+
/* GLOBALS *****************************************************************/
#define FLAG_IF (1<<9)
KiRosPrintAddress(PVOID address)
{
PLIST_ENTRY current_entry;
- MODULE_TEXT_SECTION* current;
- extern LIST_ENTRY ModuleTextListHead;
+ PLDR_DATA_TABLE_ENTRY current;
+ extern LIST_ENTRY ModuleListHead;
ULONG_PTR RelativeAddress;
ULONG i = 0;
do
{
- current_entry = ModuleTextListHead.Flink;
+ current_entry = ModuleListHead.Flink;
- while (current_entry != &ModuleTextListHead &&
- current_entry != NULL)
+ while (current_entry != &ModuleListHead)
{
current =
- CONTAINING_RECORD(current_entry, MODULE_TEXT_SECTION, ListEntry);
+ CONTAINING_RECORD(current_entry, LDR_DATA_TABLE_ENTRY, InLoadOrderModuleList);
- if (address >= (PVOID)current->Base &&
- address < (PVOID)(current->Base + current->Length))
+ if (address >= (PVOID)current->DllBase &&
+ address < (PVOID)((ULONG_PTR)current->DllBase + current->SizeOfImage))
{
- RelativeAddress = (ULONG_PTR) address - current->Base;
- DbgPrint("<%ws: %x>", current->Name, RelativeAddress);
+ RelativeAddress = (ULONG_PTR) address - (ULONG_PTR) current->DllBase;
+ DbgPrint("<%wZ: %x>", ¤t->FullDllName, RelativeAddress);
return(TRUE);
}
current_entry = current_entry->Flink;
}
- address = (PVOID)((ULONG_PTR)address & ~KERNEL_BASE);
+ address = (PVOID)((ULONG_PTR)address & ~(ULONG_PTR)MmSystemRangeStart);
} while(++i <= 1);
return(FALSE);
/* FIXME: Which exceptions are noncontinuable? */
Er.ExceptionFlags = 0;
- KiDispatchException(&Er, 0, Tf, KernelMode, TRUE);
+ KiDispatchException(&Er, NULL, Tf, KernelMode, TRUE);
return(0);
}
-ULONG
+VOID
KiDoubleFaultHandler(VOID)
{
unsigned int cr2;
DbgPrint("\n");
for(;;);
- return 0;
}
VOID
+NTAPI
KiDumpTrapFrame(PKTRAP_FRAME Tf, ULONG Parameter1, ULONG Parameter2)
{
ULONG cr3_;
* Complete CPU context
*/
{
- unsigned int cr2;
+ ULONG_PTR cr2;
NTSTATUS Status;
ULONG Esp0;
+ ASSERT(ExceptionNr != 14);
+
/* Store the exception number in an unused field in the trap frame. */
- Tf->DebugArgMark = (PVOID)ExceptionNr;
+ Tf->DebugArgMark = ExceptionNr;
/* Use the address of the trap frame as approximation to the ring0 esp */
Esp0 = (ULONG)&Tf->Eip;
/* Get CR2 */
cr2 = Ke386GetCr2();
- Tf->DebugPointer = (PVOID)cr2;
-
- if (ExceptionNr == 14 && Tf->Eflags & FLAG_IF)
- {
- Ke386EnableInterrupts();
- }
+ Tf->DebugPointer = cr2;
/*
* If this was a V86 mode exception then handle it specially
return(0);
}
- /*
- * Maybe handle the page fault and return
- */
- if (ExceptionNr == 14)
- {
- if (Ke386NoExecute && Tf->ErrorCode & 0x10 && cr2 >= KERNEL_BASE)
- {
- KEBUGCHECKWITHTF(ATTEMPTED_EXECUTE_OF_NOEXECUTE_MEMORY, 0, 0, 0, 0, Tf);
- }
- Status = MmPageFault(Tf->Cs&0xffff,
- &Tf->Eip,
- &Tf->Eax,
- cr2,
- Tf->ErrorCode);
- if (NT_SUCCESS(Status))
- {
- return(0);
- }
- }
-
/*
* Check for a breakpoint that was only for the attention of the debugger.
*/
}
}
+ULONG
+NTAPI
+KiEspFromTrapFrame(IN PKTRAP_FRAME TrapFrame)
+{
+ /* Check if this is user-mode or V86 */
+ if ((TrapFrame->Cs & 1) || (TrapFrame->Eflags & X86_EFLAGS_VM))
+ {
+ /* Return it directly */
+ return TrapFrame->Esp;
+ }
+ else
+ {
+ /* Edited frame */
+ if (!(TrapFrame->Cs & FRAME_EDITED))
+ {
+ /* Return edited value */
+ return TrapFrame->TempEsp;
+ }
+ else
+ {
+ /* Virgin frame, calculate */
+ return (ULONG)&TrapFrame->Esp;
+ }
+ }
+}
+
+VOID
+NTAPI
+KiEspToTrapFrame(IN PKTRAP_FRAME TrapFrame,
+ IN ULONG Esp)
+{
+ ULONG Previous = KiEspFromTrapFrame(TrapFrame);
+
+ /* Check if this is user-mode or V86 */
+ if ((TrapFrame->Cs & 1) || (TrapFrame->Eflags & X86_EFLAGS_VM))
+ {
+ /* Write it directly */
+ TrapFrame->Esp = Esp;
+ }
+ else
+ {
+ /* Don't allow ESP to be lowered, this is illegal */
+ if (Esp < Previous)
+ {
+ KeBugCheck(SET_OF_INVALID_CONTEXT);
+ }
+
+ /* Create an edit frame, check if it was alrady */
+ if (!(TrapFrame->Cs & FRAME_EDITED))
+ {
+ /* Update the value */
+ TrapFrame->TempEsp = Esp;
+ }
+ else
+ {
+ /* Check if ESP changed */
+ if (Previous != Esp)
+ {
+ /* Save CS */
+ TrapFrame->TempCs = TrapFrame->Cs;
+ TrapFrame->Cs &= ~FRAME_EDITED;
+
+ /* Save ESP */
+ TrapFrame->TempEsp = Esp;
+ }
+ }
+ }
+}
+
+ULONG
+NTAPI
+KiSsFromTrapFrame(IN PKTRAP_FRAME TrapFrame)
+{
+ /* If this was V86 Mode */
+ if (TrapFrame->Eflags & X86_EFLAGS_VM)
+ {
+ /* Just return it */
+ return TrapFrame->Ss;
+ }
+ else if (TrapFrame->Cs & 1)
+ {
+ /* Usermode, return the User SS */
+ return TrapFrame->Ss | 3;
+ }
+ else
+ {
+ /* Kernel mode */
+ return KERNEL_DS;
+ }
+}
+
+VOID
+NTAPI
+KiSsToTrapFrame(IN PKTRAP_FRAME TrapFrame,
+ IN ULONG Ss)
+{
+ /* Remove the high-bits */
+ Ss &= 0xFFFF;
+
+ /* If this was V86 Mode */
+ if (TrapFrame->Eflags & X86_EFLAGS_VM)
+ {
+ /* Just write it */
+ TrapFrame->Ss = Ss;
+ }
+ else if (TrapFrame->Cs & 1)
+ {
+ /* Usermode, save the User SS */
+ TrapFrame->Ss = Ss | 3;
+ }
+}
+
BOOLEAN
-STDCALL
-KeContextToTrapFrame(PCONTEXT Context,
- PKTRAP_FRAME TrapFrame)
+NTAPI
+KeContextToTrapFrame(IN PCONTEXT Context,
+ IN OUT PKEXCEPTION_FRAME ExceptionFrame,
+ IN OUT PKTRAP_FRAME TrapFrame,
+ IN KPROCESSOR_MODE PreviousMode)
{
+ BOOLEAN V86Switch = FALSE;
+
/* Start with the basic Registers */
if ((Context->ContextFlags & CONTEXT_CONTROL) == CONTEXT_CONTROL)
{
- TrapFrame->Esp = Context->Esp;
- TrapFrame->Ss = Context->SegSs;
- TrapFrame->Cs = Context->SegCs;
- TrapFrame->Eip = Context->Eip;
+ /* Check if we went through a V86 switch */
+ if ((Context->EFlags & X86_EFLAGS_VM) !=
+ (TrapFrame->Eflags & X86_EFLAGS_VM))
+ {
+ /* We did, remember this for later */
+ V86Switch = TRUE;
+ }
+
+ /* Copy EFLAGS. FIXME: Needs to be sanitized */
TrapFrame->Eflags = Context->EFlags;
+
+ /* Copy EBP and EIP */
TrapFrame->Ebp = Context->Ebp;
+ TrapFrame->Eip = Context->Eip;
+
+ /* Check if we were in V86 Mode */
+ if (TrapFrame->Eflags & X86_EFLAGS_VM)
+ {
+ /* Simply copy the CS value */
+ TrapFrame->Cs = Context->SegCs;
+ }
+ else
+ {
+ /* We weren't in V86, so sanitize the CS (FIXME!) */
+ TrapFrame->Cs = Context->SegCs;
+
+ /* Don't let it under 8, that's invalid */
+ if ((PreviousMode !=KernelMode) && (TrapFrame->Cs < 8))
+ {
+ /* Force it to User CS */
+ TrapFrame->Cs = USER_CS;
+ }
+ }
+
+ /* Handle SS Specially for validation */
+ KiSsToTrapFrame(TrapFrame, Context->SegSs);
+
+ /* Write ESP back; take into account Edited Trap Frames */
+ KiEspToTrapFrame(TrapFrame, Context->Esp);
+
+ /* Handle our V86 Bias if we went through a switch */
+ if (V86Switch) Ki386AdjustEsp0(TrapFrame);
}
/* Process the Integer Registers */
/* Process the Context Segments */
if ((Context->ContextFlags & CONTEXT_SEGMENTS) == CONTEXT_SEGMENTS)
{
- TrapFrame->Ds = Context->SegDs;
- TrapFrame->Es = Context->SegEs;
- TrapFrame->Fs = Context->SegFs;
- TrapFrame->Gs = Context->SegGs;
+ /* Check if we were in V86 Mode */
+ if (TrapFrame->Eflags & X86_EFLAGS_VM)
+ {
+ /* Copy the V86 Segments directlry */
+ TrapFrame->V86_Ds = Context->SegDs;
+ TrapFrame->V86_Es = Context->SegEs;
+ TrapFrame->V86_Fs = Context->SegFs;
+ TrapFrame->V86_Gs = Context->SegGs;
+ }
+ else if (!(TrapFrame->Cs & 1))
+ {
+ /* For user mode, write the values directly */
+ TrapFrame->Ds = USER_DS;
+ TrapFrame->Es = USER_DS;
+ TrapFrame->Fs = Context->SegFs;
+ TrapFrame->Gs = 0;
+ }
+ else
+ {
+ /* For kernel-mode, return the values */
+ TrapFrame->Ds = Context->SegDs;
+ TrapFrame->Es = Context->SegEs;
+ TrapFrame->Fs = Context->SegFs;
+
+ /* Handle GS specially */
+ if (TrapFrame->Cs == USER_CS)
+ {
+ /* Don't use it, if user */
+ TrapFrame->Gs = 0;
+ }
+ else
+ {
+ /* Copy it if kernel */
+ TrapFrame->Gs = Context->SegGs;
+ }
+ }
}
/* Handle the Debug Registers */
if ((Context->ContextFlags & CONTEXT_DEBUG_REGISTERS) == CONTEXT_DEBUG_REGISTERS)
{
+ /* FIXME: All these should be sanitized */
TrapFrame->Dr0 = Context->Dr0;
TrapFrame->Dr1 = Context->Dr1;
TrapFrame->Dr2 = Context->Dr2;
TrapFrame->Dr3 = Context->Dr3;
TrapFrame->Dr6 = Context->Dr6;
TrapFrame->Dr7 = Context->Dr7;
+
+ /* Check if usermode */
+ if (PreviousMode != KernelMode)
+ {
+ /* Set the Debug Flag */
+ KeGetCurrentThread()->DispatcherHeader.DebugActive = (Context->Dr7 & DR7_ACTIVE);
+ }
}
/* Handle FPU and Extended Registers */
}
VOID
-KeTrapFrameToContext(PKTRAP_FRAME TrapFrame,
- PCONTEXT Context)
+NTAPI
+KeTrapFrameToContext(IN PKTRAP_FRAME TrapFrame,
+ IN PKEXCEPTION_FRAME ExceptionFrame,
+ IN OUT PCONTEXT Context)
{
- if ((Context->ContextFlags & CONTEXT_CONTROL) == CONTEXT_CONTROL)
- {
- Context->SegSs = TrapFrame->Ss;
- Context->Esp = TrapFrame->Esp;
- Context->SegCs = TrapFrame->Cs;
- Context->Eip = TrapFrame->Eip;
- Context->EFlags = TrapFrame->Eflags;
- Context->Ebp = TrapFrame->Ebp;
- }
- if ((Context->ContextFlags & CONTEXT_INTEGER) == CONTEXT_INTEGER)
- {
- Context->Eax = TrapFrame->Eax;
- Context->Ebx = TrapFrame->Ebx;
- Context->Ecx = TrapFrame->Ecx;
- /*
- * NOTE: In the trap frame which is built on entry to a system
- * call TrapFrame->Edx will actually hold the address of the
- * previous TrapFrame. I don't believe leaking this information
- * has security implications. Also EDX holds the address of the
- * arguments to the system call in progress so it isn't of much
- * interest to the debugger.
- */
- Context->Edx = TrapFrame->Edx;
- Context->Esi = TrapFrame->Esi;
- Context->Edi = TrapFrame->Edi;
- }
- if ((Context->ContextFlags & CONTEXT_SEGMENTS) == CONTEXT_SEGMENTS)
- {
- Context->SegDs = TrapFrame->Ds;
- Context->SegEs = TrapFrame->Es;
- Context->SegFs = TrapFrame->Fs;
- Context->SegGs = TrapFrame->Gs;
- }
- if ((Context->ContextFlags & CONTEXT_DEBUG_REGISTERS) == CONTEXT_DEBUG_REGISTERS)
- {
- /*
- * FIXME: Implement this case
- */
- Context->ContextFlags &= (~CONTEXT_DEBUG_REGISTERS) | CONTEXT_i386;
- }
- if ((Context->ContextFlags & CONTEXT_FLOATING_POINT) == CONTEXT_FLOATING_POINT)
- {
- /*
- * FIXME: Implement this case
- *
- * I think this should only be filled for FPU exceptions, otherwise I
- * would not know where to get it from as it can be the current state
- * of the FPU or already saved in the thread's FPU save area.
- * -blight
- */
- Context->ContextFlags &= (~CONTEXT_FLOATING_POINT) | CONTEXT_i386;
- }
-#if 0
- if ((Context->ContextFlags & CONTEXT_EXTENDED_REGISTERS) == CONTEXT_EXTENDED_REGISTERS)
- {
- /*
- * FIXME: Investigate this
- *
- * This is the XMM state (first 512 bytes of FXSAVE_FORMAT/FX_SAVE_AREA)
- * This should only be filled in case of a SIMD exception I think, so
- * this is not the right place (like for FPU the state could already be
- * saved in the thread's FX_SAVE_AREA or still be in the CPU)
- * -blight
- */
- Context->ContextFlags &= ~CONTEXT_EXTENDED_REGISTERS;
- }
-#endif
+ PFX_SAVE_AREA FxSaveArea = NULL;
+
+ /* Start with the Control flags */
+ if ((Context->ContextFlags & CONTEXT_CONTROL) == CONTEXT_CONTROL)
+ {
+ /* EBP, EIP and EFLAGS */
+ Context->Ebp = TrapFrame->Ebp;
+ Context->Eip = TrapFrame->Eip;
+ Context->EFlags = TrapFrame->Eflags;
+
+ /* Return the correct CS */
+ if (!(TrapFrame->Cs & FRAME_EDITED) &&
+ !(TrapFrame->Eflags & X86_EFLAGS_VM))
+ {
+ /* Get it from the Temp location */
+ Context->SegCs = TrapFrame->TempCs & 0xFFFF;
+ }
+ else
+ {
+ /* Return it directly */
+ Context->SegCs = TrapFrame->Cs & 0xFFFF;
+ }
+
+ /* Get the Ss and ESP */
+ Context->SegSs = KiSsFromTrapFrame(TrapFrame);
+ Context->Esp = KiEspFromTrapFrame(TrapFrame);
+ }
+
+ /* Handle the Segments */
+ if ((Context->ContextFlags & CONTEXT_SEGMENTS) == CONTEXT_SEGMENTS)
+ {
+ /* Do V86 Mode first */
+ if (TrapFrame->Eflags & X86_EFLAGS_VM)
+ {
+ /* Return from the V86 location */
+ Context->SegGs = TrapFrame->V86_Gs & 0xFFFF;
+ Context->SegFs = TrapFrame->V86_Fs & 0xFFFF;
+ Context->SegEs = TrapFrame->V86_Es & 0xFFFF;
+ Context->SegDs = TrapFrame->V86_Ds & 0xFFFF;
+ }
+ else
+ {
+ /* Check if this was a Kernel Trap */
+ if (TrapFrame->Cs == KERNEL_CS)
+ {
+ /* Set valid selectors */
+ TrapFrame->Gs = 0;
+ TrapFrame->Fs = PCR_SELECTOR;
+ TrapFrame->Es = USER_DS;
+ TrapFrame->Ds = USER_DS;
+ }
+
+ /* Return the segments */
+ Context->SegGs = TrapFrame->Gs & 0xFFFF;
+ Context->SegFs = TrapFrame->Fs & 0xFFFF;
+ Context->SegEs = TrapFrame->Es & 0xFFFF;
+ Context->SegDs = TrapFrame->Ds & 0xFFFF;
+ }
+ }
+
+ /* Handle the simple registers */
+ if ((Context->ContextFlags & CONTEXT_INTEGER) == CONTEXT_INTEGER)
+ {
+ /* Return them directly */
+ Context->Eax = TrapFrame->Eax;
+ Context->Ebx = TrapFrame->Ebx;
+ Context->Ecx = TrapFrame->Ecx;
+ Context->Edx = TrapFrame->Edx;
+ Context->Esi = TrapFrame->Esi;
+ Context->Edi = TrapFrame->Edi;
+ }
+
+ if ((Context->ContextFlags & CONTEXT_DEBUG_REGISTERS) == CONTEXT_DEBUG_REGISTERS)
+ {
+ /*
+ * FIXME: Implement this case
+ */
+ Context->ContextFlags &= (~CONTEXT_DEBUG_REGISTERS) | CONTEXT_i386;
+ }
+ if ((Context->ContextFlags & CONTEXT_FLOATING_POINT) == CONTEXT_FLOATING_POINT)
+ {
+ FxSaveArea = KiGetFpuState(KeGetCurrentThread());
+ if (FxSaveArea != NULL)
+ {
+ KiFxSaveAreaToFloatingSaveArea(&Context->FloatSave, FxSaveArea);
+ }
+ else
+ {
+ Context->ContextFlags &= (~CONTEXT_FLOATING_POINT) | CONTEXT_i386;
+ }
+ }
+ if ((Context->ContextFlags & CONTEXT_EXTENDED_REGISTERS) == CONTEXT_EXTENDED_REGISTERS)
+ {
+ if (FxSaveArea == NULL)
+ FxSaveArea = KiGetFpuState(KeGetCurrentThread());
+ if (FxSaveArea != NULL)
+ {
+ memcpy(Context->ExtendedRegisters, &FxSaveArea->U.FxArea,
+ min(sizeof (Context->ExtendedRegisters), sizeof (FxSaveArea->U.FxArea)) );
+ }
+ else
+ {
+ Context->ContextFlags &= (~CONTEXT_EXTENDED_REGISTERS) | CONTEXT_i386;
+ }
+ }
}
VOID
+NTAPI
KeDumpStackFrames(PULONG Frame)
{
PULONG StackBase, StackEnd;
}
StackBase = Frame;
- StackEnd = mbi.BaseAddress + mbi.RegionSize;
+ StackEnd = (PULONG)((ULONG_PTR)mbi.BaseAddress + mbi.RegionSize);
while ( Frame >= StackBase && Frame < StackEnd )
{
if ( !Frame )
{
#if defined __GNUC__
- __asm__("mov %%ebp, %%ebx" : "=b" (Frame) : );
+ __asm__("mov %%ebp, %0" : "=r" (Frame) : );
#elif defined(_MSC_VER)
__asm mov [Frame], ebp
#endif
}
StackBase = Frame;
- StackEnd = mbi.BaseAddress + mbi.RegionSize;
+ StackEnd = (PULONG)((ULONG_PTR)mbi.BaseAddress + mbi.RegionSize);
while ( Frame >= StackBase && Frame < StackEnd && i++ < FrameCount )
{
_SEH_TRY
{
#if defined __GNUC__
- __asm__("mov %%ebp, %%ebx" : "=b" (Frame) : );
+ __asm__("mov %%ebp, %0" : "=r" (Frame) : );
#elif defined(_MSC_VER)
__asm mov [Frame], ebp
#endif
}
StackBase = Frame;
- StackEnd = mbi.BaseAddress + mbi.RegionSize;
+ StackEnd = (PULONG)((ULONG_PTR)mbi.BaseAddress + mbi.RegionSize);
while ( Count < FrameCount && Frame >= StackBase && Frame < StackEnd )
{
KiIdt[sel].b = 0x8500;
}
-VOID INIT_FUNCTION
+VOID
+INIT_FUNCTION
+NTAPI
KeInitExceptions(VOID)
/*
* FUNCTION: Initalize CPU exception handling
set_system_call_gate(0x2e,(int)KiSystemService);
}
+VOID
+NTAPI
+KiDispatchException(PEXCEPTION_RECORD ExceptionRecord,
+ PKEXCEPTION_FRAME ExceptionFrame,
+ PKTRAP_FRAME TrapFrame,
+ KPROCESSOR_MODE PreviousMode,
+ BOOLEAN FirstChance)
+{
+ CONTEXT Context;
+ KD_CONTINUE_TYPE Action;
+ ULONG_PTR Stack, NewStack;
+ ULONG Size;
+ BOOLEAN UserDispatch = FALSE;
+ DPRINT("KiDispatchException() called\n");
+
+ /* Increase number of Exception Dispatches */
+ KeGetCurrentPrcb()->KeExceptionDispatchCount++;
+
+ /* Set the context flags */
+ Context.ContextFlags = CONTEXT_FULL | CONTEXT_DEBUG_REGISTERS;
+
+ /* Check if User Mode */
+ if (PreviousMode == UserMode)
+ {
+ extern ULONG FxsrSupport;
+ /* Add the FPU Flag */
+ Context.ContextFlags |= CONTEXT_FLOATING_POINT;
+ if (FxsrSupport)
+ Context.ContextFlags |= CONTEXT_EXTENDED_REGISTERS;
+ }
+
+ /* Get a Context */
+ KeTrapFrameToContext(TrapFrame, ExceptionFrame, &Context);
+
+ /* Handle kernel-mode first, it's simpler */
+ if (PreviousMode == KernelMode)
+ {
+ /* Check if this is a first-chance exception */
+ if (FirstChance == TRUE)
+ {
+ /* Break into the debugger for the first time */
+ Action = KdpEnterDebuggerException(ExceptionRecord,
+ PreviousMode,
+ &Context,
+ TrapFrame,
+ TRUE,
+ TRUE);
+
+ /* If the debugger said continue, then continue */
+ if (Action == kdContinue) goto Handled;
+
+ /* If the Debugger couldn't handle it, dispatch the exception */
+ if (RtlDispatchException(ExceptionRecord, &Context))
+ {
+ /* It was handled by an exception handler, continue */
+ goto Handled;
+ }
+ }
+
+ /* This is a second-chance exception, only for the debugger */
+ Action = KdpEnterDebuggerException(ExceptionRecord,
+ PreviousMode,
+ &Context,
+ TrapFrame,
+ FALSE,
+ FALSE);
+
+ /* If the debugger said continue, then continue */
+ if (Action == kdContinue) goto Handled;
+
+ /* Third strike; you're out */
+ KEBUGCHECKWITHTF(KMODE_EXCEPTION_NOT_HANDLED,
+ ExceptionRecord->ExceptionCode,
+ (ULONG_PTR)ExceptionRecord->ExceptionAddress,
+ ExceptionRecord->ExceptionInformation[0],
+ ExceptionRecord->ExceptionInformation[1],
+ TrapFrame);
+ }
+ else
+ {
+ /* User mode exception, was it first-chance? */
+ if (FirstChance)
+ {
+ /* Enter Debugger if available */
+ Action = KdpEnterDebuggerException(ExceptionRecord,
+ PreviousMode,
+ &Context,
+ TrapFrame,
+ TRUE,
+ TRUE);
+
+ /* Exit if we're continuing */
+ if (Action == kdContinue) goto Handled;
+
+ /* FIXME: Forward exception to user mode debugger */
+
+ /* Set up the user-stack */
+ _SEH_TRY
+ {
+ /* Align context size and get stack pointer */
+ Size = (sizeof(CONTEXT) + 3) & ~3;
+ Stack = (Context.Esp & ~3) - Size;
+ DPRINT("Stack: %lx\n", Stack);
+
+ /* Probe stack and copy Context */
+ ProbeForWrite((PVOID)Stack, Size, sizeof(ULONG));
+ RtlCopyMemory((PVOID)Stack, &Context, sizeof(CONTEXT));
+
+ /* Align exception record size and get stack pointer */
+ Size = (sizeof(EXCEPTION_RECORD) -
+ (EXCEPTION_MAXIMUM_PARAMETERS - ExceptionRecord->NumberParameters) *
+ sizeof(ULONG) + 3) & ~3;
+ NewStack = Stack - Size;
+ DPRINT("NewStack: %lx\n", NewStack);
+
+ /* Probe stack and copy exception record. Don't forget to add the two params */
+ ProbeForWrite((PVOID)(NewStack - 2 * sizeof(ULONG_PTR)),
+ Size + 2 * sizeof(ULONG_PTR),
+ sizeof(ULONG));
+ RtlCopyMemory((PVOID)NewStack, ExceptionRecord, Size);
+
+ /* Now write the two params for the user-mode dispatcher */
+ *(PULONG_PTR)(NewStack - 1 * sizeof(ULONG_PTR)) = Stack;
+ *(PULONG_PTR)(NewStack - 2 * sizeof(ULONG_PTR)) = NewStack;
+
+ /* Set new Stack Pointer */
+ KiEspToTrapFrame(TrapFrame, NewStack - 2 * sizeof(ULONG_PTR));
+
+ /* Set EIP to the User-mode Dispathcer */
+ TrapFrame->Eip = (ULONG)KeUserExceptionDispatcher;
+ UserDispatch = TRUE;
+ _SEH_LEAVE;
+ }
+ _SEH_HANDLE
+ {
+ /* Do second-chance */
+ }
+ _SEH_END;
+ }
+
+ /* If we dispatch to user, return now */
+ if (UserDispatch) return;
+
+ /* FIXME: Forward the exception to the debugger for 2nd chance */
+
+ /* 3rd strike, kill the thread */
+ DPRINT1("Unhandled UserMode exception, terminating thread\n");
+ ZwTerminateThread(NtCurrentThread(), ExceptionRecord->ExceptionCode);
+ KEBUGCHECKWITHTF(KMODE_EXCEPTION_NOT_HANDLED,
+ ExceptionRecord->ExceptionCode,
+ (ULONG_PTR)ExceptionRecord->ExceptionAddress,
+ ExceptionRecord->ExceptionInformation[0],
+ ExceptionRecord->ExceptionInformation[1],
+ TrapFrame);
+ }
+
+Handled:
+ /* Convert the context back into Trap/Exception Frames */
+ KeContextToTrapFrame(&Context, NULL, TrapFrame, PreviousMode);
+ return;
+}
+
/*
* @implemented
*/
} _SEH_END;
OldEip = Thread->TrapFrame->Eip;
- Thread->TrapFrame->Eip = (ULONG_PTR)LdrpGetSystemDllRaiseExceptionDispatcher();
+ Thread->TrapFrame->Eip = (ULONG_PTR)KeRaiseUserExceptionDispatcher;
return((NTSTATUS)OldEip);
}
-/*
- * @implemented
- */
-NTSTATUS
-STDCALL
-NtRaiseException (
- IN PEXCEPTION_RECORD ExceptionRecord,
- IN PCONTEXT Context,
- IN BOOLEAN SearchFrames)
-{
- PKTHREAD Thread = KeGetCurrentThread();
- PKTRAP_FRAME TrapFrame = Thread->TrapFrame;
- PKTRAP_FRAME PrevTrapFrame = (PKTRAP_FRAME)TrapFrame->Edx;
-
- KeGetCurrentKPCR()->Tib.ExceptionList = TrapFrame->ExceptionList;
-
- KiDispatchException(ExceptionRecord,
- Context,
- TrapFrame,
- KeGetPreviousMode(),
- SearchFrames);
-
- /* Restore the user context */
- Thread->TrapFrame = PrevTrapFrame;
- __asm__("mov %%ebx, %%esp;\n" "jmp _KiServiceExit": : "b" (TrapFrame));
-
- /* We never get here */
- return(STATUS_SUCCESS);
-}
projects / reactos.git / blobdiff