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diff --git a/sys/contrib/edk2/Include/Library/UefiBootServicesTableLib.h b/sys/contrib/edk2/Include/Library/UefiBootServicesTableLib.h
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+/** @file
+ Provides a service to retrieve a pointer to the EFI Boot Services Table.
+ Only available to DXE and UEFI module types.
+
+Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef __UEFI_BOOT_SERVICES_TABLE_LIB_H__
+#define __UEFI_BOOT_SERVICES_TABLE_LIB_H__
+
+///
+/// Cache the Image Handle
+///
+extern EFI_HANDLE gImageHandle;
+
+///
+/// Cache pointer to the EFI System Table
+///
+extern EFI_SYSTEM_TABLE *gST;
+
+///
+/// Cache pointer to the EFI Boot Services Table
+///
+extern EFI_BOOT_SERVICES *gBS;
+
+#endif