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[RTL] Simplify RtlRaiseException

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This commit is contained in:
Timo Kreuzer 2018-03-02 07:48:34 +01:00
parent 3ec1ca9b46
commit e6af7d9dfe
1 changed files with 22 additions and 42 deletions
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64
sdk/lib/rtl/amd64/except.c
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@ -19,57 +19,37 @@ RtlRaiseException(IN PEXCEPTION_RECORD ExceptionRecord)
{
CONTEXT Context;
NTSTATUS Status = STATUS_INVALID_DISPOSITION;
ULONG64 ImageBase;
PRUNTIME_FUNCTION FunctionEntry;
PVOID HandlerData;
ULONG64 EstablisherFrame;
/* Capture the context */
/* Capture the current context */
RtlCaptureContext(&Context);
/* Get the function entry for this function */
FunctionEntry = RtlLookupFunctionEntry(Context.Rip,
&ImageBase,
NULL);
/* Fix up Context.Rip for the caller */
Context.Rip = (ULONG64)_ReturnAddress();
/* Check if we found it */
if (FunctionEntry)
/* Fix up Context.Rsp for the caller */
Context.Rsp = (ULONG64)_AddressOfReturnAddress() + 8;
/* Save the exception address */
ExceptionRecord->ExceptionAddress = (PVOID)Context.Rip;
/* Check if user mode debugger is active */
if (RtlpCheckForActiveDebugger())
{
/* Unwind to the caller of this function */
RtlVirtualUnwind(UNW_FLAG_NHANDLER,
ImageBase,
Context.Rip,
FunctionEntry,
&Context,
&HandlerData,
&EstablisherFrame,
NULL);
/* Save the exception address */
ExceptionRecord->ExceptionAddress = (PVOID)Context.Rip;
/* Write the context flag */
Context.ContextFlags = CONTEXT_FULL;
/* Check if user mode debugger is active */
if (RtlpCheckForActiveDebugger())
/* Raise an exception immediately */
Status = ZwRaiseException(ExceptionRecord, &Context, TRUE);
}
else
{
/* Dispatch the exception and check if we should continue */
if (!RtlDispatchException(ExceptionRecord, &Context))
{
/* Raise an exception immediately */
Status = ZwRaiseException(ExceptionRecord, &Context, TRUE);
/* Raise the exception */
Status = ZwRaiseException(ExceptionRecord, &Context, FALSE);
}
else
{
/* Dispatch the exception and check if we should continue */
if (!RtlDispatchException(ExceptionRecord, &Context))
{
/* Raise the exception */
Status = ZwRaiseException(ExceptionRecord, &Context, FALSE);
}
else
{
/* Continue, go back to previous context */
Status = ZwContinue(&Context, FALSE);
}
/* Continue, go back to previous context */
Status = ZwContinue(&Context, FALSE);
}
}