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- Okay so we've got a basic KiDispatchException, we now need KiTrapFrameToContext and KiContextToTrapFrame.

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- We aren't really sure where the hell we are since we can't printf anything otherwise we'll trap again and end up in an infinite loop.
- So we're debugging with while (TRUE).


svn path=/trunk/; revision=34481
This commit is contained in:
ReactOS Portable Systems Group 2008-07-13 23:46:50 +00:00
parent 784b0af4cd
commit 673e2fd5fd
2 changed files with 144 additions and 2 deletions
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145
reactos/ntoskrnl/ke/arm/exp.c
View file

@ -25,6 +25,149 @@ KeContextToTrapFrame(IN PCONTEXT Context,
IN ULONG ContextFlags,
IN KPROCESSOR_MODE PreviousMode)
{
UNIMPLEMENTED;
while (TRUE);
return;
}
VOID
NTAPI
KeTrapFrameToContext(IN PKTRAP_FRAME TrapFrame,
IN PKEXCEPTION_FRAME ExceptionFrame,
IN OUT PCONTEXT Context)
{
while (TRUE);
return;
}
VOID
NTAPI
KiDispatchException(IN PEXCEPTION_RECORD ExceptionRecord,
IN PKEXCEPTION_FRAME ExceptionFrame,
IN PKTRAP_FRAME TrapFrame,
IN KPROCESSOR_MODE PreviousMode,
IN BOOLEAN FirstChance)
{
CONTEXT Context;
//
// Increase number of Exception Dispatches
//
KeGetCurrentPrcb()->KeExceptionDispatchCount++;
//
// Set the context flags
//
Context.ContextFlags = CONTEXT_FULL;
//
// FIXME: Fuck floating point
//
//
// Get a Context
//
KeTrapFrameToContext(TrapFrame, ExceptionFrame, &Context);
//
// Look at our exception code
//
switch (ExceptionRecord->ExceptionCode)
{
//
// Breakpoint
//
case STATUS_BREAKPOINT:
//
// Decrement PC by one
//
Context.Pc--;
break;
//
// Internal exception
//
case KI_EXCEPTION_ACCESS_VIOLATION:
//
// Set correct code
//
ExceptionRecord->ExceptionCode = STATUS_ACCESS_VIOLATION;
break;
}
//
// 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
//
if (KiDebugRoutine(TrapFrame,
ExceptionFrame,
ExceptionRecord,
&Context,
PreviousMode,
FALSE))
{
//
// Exception was handled
//
goto Handled;
}
//
// If the Debugger couldn't handle it, dispatch the exception
//
if (RtlDispatchException(ExceptionRecord, &Context)) goto Handled;
}
//
// This is a second-chance exception, only for the debugger
//
if (KiDebugRoutine(TrapFrame,
ExceptionFrame,
ExceptionRecord,
&Context,
PreviousMode,
TRUE))
{
//
// Exception was handled
//
goto Handled;
}
//
// Third strike; you're out
//
KeBugCheckEx(KMODE_EXCEPTION_NOT_HANDLED,
ExceptionRecord->ExceptionCode,
(ULONG_PTR)ExceptionRecord->ExceptionAddress,
(ULONG_PTR)TrapFrame,
0);
}
else
{
//
// FIXME: User mode
//
ASSERT(FALSE);
}
Handled:
//
// Convert the context back into Trap/Exception Frames
//
KeContextToTrapFrame(&Context,
ExceptionFrame,
TrapFrame,
Context.ContextFlags,
PreviousMode);
}

1
reactos/ntoskrnl/ke/arm/stubs_asm.s
View file

@ -39,7 +39,6 @@ GENERATE_ARM_STUB RtlInitializeContext
//
GENERATE_ARM_STUB KiInitializeUserApc
GENERATE_ARM_STUB KeDisableInterrupts
GENERATE_ARM_STUB KiDispatchException
GENERATE_ARM_STUB KiSwapProcess
GENERATE_ARM_STUB KeSwitchKernelStack