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diff --git a/src/VBox/Devices/EFI/Firmware/SourceLevelDebugPkg/Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLib.h b/src/VBox/Devices/EFI/Firmware/SourceLevelDebugPkg/Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLib.h
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index 00000000..8ba58fde
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/SourceLevelDebugPkg/Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLib.h
@@ -0,0 +1,73 @@
+/** @file
+ PE/Coff Extra Action library instances, it will report image debug info.
+
+ Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _PE_COFF_EXTRA_ACTION_LIB_H_
+#define _PE_COFF_EXTRA_ACTION_LIB_H_
+
+#include <Base.h>
+#include <Library/PeCoffExtraActionLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseLib.h>
+#include <Library/IoLib.h>
+#include <Library/PcdLib.h>
+#include <Library/BaseMemoryLib.h>
+
+#include <ImageDebugSupport.h>
+
+#define DEBUG_LOAD_IMAGE_METHOD_IO_HW_BREAKPOINT 1
+#define DEBUG_LOAD_IMAGE_METHOD_SOFT_INT3 2
+
+#define IO_HW_BREAKPOINT_VECTOR_NUM 1
+#define SOFT_INT_VECTOR_NUM 3
+
+extern UINTN AsmInterruptHandle;
+
+/**
+ Read IDT entry to check if IDT entries are setup by Debug Agent.
+
+ @param[in] IdtDescriptor Pointer to IDT Descriptor.
+ @param[in] InterruptType Interrupt type.
+
+ @retval TRUE IDT entries were setup by Debug Agent.
+ @retval FALSE IDT entries were not setuo by Debug Agent.
+
+**/
+BOOLEAN
+CheckDebugAgentHandler (
+ IN IA32_DESCRIPTOR *IdtDescriptor,
+ IN UINTN InterruptType
+ );
+
+/**
+ Save IDT entry for INT1 and update it.
+
+ @param[in] IdtDescriptor Pointer to IDT Descriptor.
+ @param[out] SavedIdtEntry Original IDT entry returned.
+
+**/
+VOID
+SaveAndUpdateIdtEntry1 (
+ IN IA32_DESCRIPTOR *IdtDescriptor,
+ OUT IA32_IDT_GATE_DESCRIPTOR *SavedIdtEntry
+ );
+
+/**
+ Restore IDT entry for INT1.
+
+ @param[in] IdtDescriptor Pointer to IDT Descriptor.
+ @param[in] RestoredIdtEntry IDT entry to be restored.
+
+**/
+VOID
+RestoreIdtEntry1 (
+ IN IA32_DESCRIPTOR *IdtDescriptor,
+ IN IA32_IDT_GATE_DESCRIPTOR *RestoredIdtEntry
+ );
+
+#endif
+