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diff --git a/MdePkg/Library/BaseLib/X64/ReadDr4.S b/MdePkg/Library/BaseLib/X64/ReadDr4.S
new file mode 100644
index 0000000000..f98c9ed35d
--- /dev/null
+++ b/MdePkg/Library/BaseLib/X64/ReadDr4.S
@@ -0,0 +1,37 @@
+#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006, Intel Corporation
+# All rights reserved. This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which 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.
+#
+# Module Name:
+#
+#   ReadDr4.S
+#
+# Abstract:
+#
+#   AsmReadDr4 function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+
+#------------------------------------------------------------------------------
+# UINTN
+# EFIAPI
+# AsmReadDr4 (
+#   VOID
+#   );
+#------------------------------------------------------------------------------
+.global _AsmReadDr4;
+.align 16;
+_AsmReadDr4:
+    #DB      0fh, 21h, 0e0h
+    mov     %dr4, %rax
+    ret