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117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/*
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* PROJECT: ReactOS Run-Time Library
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: User-mode exception support for AMD64
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* COPYRIGHT: Copyright 2018-2021 Timo Kreuzer <timo.kreuzer@reactos.org>
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*/
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/* INCLUDES *****************************************************************/
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#include <rtl.h>
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#define NDEBUG
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#include <debug.h>
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/* PUBLIC FUNCTIONS **********************************************************/
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VOID
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NTAPI
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RtlRaiseException(IN PEXCEPTION_RECORD ExceptionRecord)
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{
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CONTEXT Context;
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NTSTATUS Status = STATUS_INVALID_DISPOSITION;
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/* Capture the current context */
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RtlCaptureContext(&Context);
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/* Fix up Context.Rip for the caller */
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Context.Rip = (ULONG64)_ReturnAddress();
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/* Fix up Context.Rsp for the caller */
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Context.Rsp = (ULONG64)_AddressOfReturnAddress() + 8;
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/* Save the exception address */
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ExceptionRecord->ExceptionAddress = (PVOID)Context.Rip;
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/* Check if user mode debugger is active */
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if (RtlpCheckForActiveDebugger())
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{
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/* Raise an exception immediately */
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Status = ZwRaiseException(ExceptionRecord, &Context, TRUE);
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}
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else
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{
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/* Dispatch the exception and check if we should continue */
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if (!RtlDispatchException(ExceptionRecord, &Context))
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{
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/* Raise the exception */
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Status = ZwRaiseException(ExceptionRecord, &Context, FALSE);
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}
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else
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{
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/* Continue, go back to previous context */
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Status = ZwContinue(&Context, FALSE);
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}
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}
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/* If we returned, raise a status */
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RtlRaiseStatus(Status);
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}
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/*
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* @unimplemented
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*/
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PVOID
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NTAPI
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RtlpGetExceptionAddress(VOID)
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{
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UNIMPLEMENTED;
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return NULL;
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}
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BOOLEAN
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NTAPI
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RtlpUnwindInternal(
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_In_opt_ PVOID TargetFrame,
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_In_opt_ PVOID TargetIp,
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_In_ PEXCEPTION_RECORD ExceptionRecord,
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_In_ PVOID ReturnValue,
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_In_ PCONTEXT ContextRecord,
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_In_opt_ struct _UNWIND_HISTORY_TABLE *HistoryTable,
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_In_ ULONG Flags);
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/*
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* @unimplemented
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*/
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BOOLEAN
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NTAPI
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RtlDispatchException(
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_In_ PEXCEPTION_RECORD ExceptionRecord,
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_In_ PCONTEXT ContextRecord)
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{
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BOOLEAN Handled;
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/* Perform vectored exception handling for user mode */
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if (RtlCallVectoredExceptionHandlers(ExceptionRecord, ContextRecord))
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{
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/* Exception handled, now call vectored continue handlers */
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RtlCallVectoredContinueHandlers(ExceptionRecord, ContextRecord);
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/* Continue execution */
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return TRUE;
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}
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/* Call the internal unwind routine */
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Handled = RtlpUnwindInternal(NULL, // TargetFrame
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NULL, // TargetIp
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ExceptionRecord,
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0, // ReturnValue
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ContextRecord,
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NULL, // HistoryTable
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UNW_FLAG_EHANDLER);
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/* In user mode, call any registered vectored continue handlers */
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RtlCallVectoredContinueHandlers(ExceptionRecord, ContextRecord);
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return Handled;
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}
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