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diff --git a/StdLibPrivateInternalFiles/Include/Efi/SysEfi.h b/StdLibPrivateInternalFiles/Include/Efi/SysEfi.h
new file mode 100644
index 0000000000..fa9dc38cdd
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+++ b/StdLibPrivateInternalFiles/Include/Efi/SysEfi.h
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+/** @file
+  Declarations local to the Uefi SysCalls module of the Standard C Library.
+
+  Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+  This program and the accompanying materials are licensed and made available under
+  the terms and conditions of the BSD License that accompanies this distribution.
+  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php.
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+#ifndef _SYSEFI_H
+#define _SYSEFI_H
+#include  <Protocol/SimpleFileSystem.h>
+
+#define EFI_FILE_MODE_MASK    ( EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE )
+#define OMODE_MASK            0xFFFF00UL
+#define OMODE_SHIFT           8
+
+#define S_ACC_READ            ( S_IRUSR | S_IRGRP | S_IROTH | S_IXUSR | S_IXGRP | S_IXOTH )
+#define S_ACC_WRITE           ( S_IWUSR | S_IWGRP | S_IWOTH )
+#define S_ACC_MASK            ( S_IRWXU | S_IRWXG | S_IRWXO )
+
+UINT64
+Oflags2EFI( int oflags);
+
+UINT64
+Omode2EFI( int mode);
+
+/* Converts the first several EFI status values into the appropriate errno value.
+*/
+int
+EFI2errno( RETURN_STATUS Status);
+
+#endif  /* _SYSEFI_H */