2 files changed, 40 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf
index e35fd55295..e4d7741df2 100644
--- a/MdePkg/Library/BaseLib/BaseLib.inf
+++ b/MdePkg/Library/BaseLib/BaseLib.inf
@@ -509,6 +509,7 @@
   X64/FxRestore.asm | MSFT
   X64/FxSave.nasm| MSFT
   X64/FxSave.asm | MSFT
+  X64/WriteLdtr.nasm| MSFT
   X64/WriteLdtr.asm | MSFT
   X64/ReadLdtr.asm | MSFT
   X64/WriteIdtr.asm | MSFT
@@ -613,6 +614,7 @@
   X64/FxRestore.asm | INTEL
   X64/FxSave.nasm| INTEL
   X64/FxSave.asm | INTEL
+  X64/WriteLdtr.nasm| INTEL
   X64/WriteLdtr.asm | INTEL
   X64/ReadLdtr.asm | INTEL
   X64/WriteIdtr.asm | INTEL
diff --git a/MdePkg/Library/BaseLib/X64/WriteLdtr.nasm b/MdePkg/Library/BaseLib/X64/WriteLdtr.nasm
new file mode 100644
index 0000000000..8c83844f0d
--- /dev/null
+++ b/MdePkg/Library/BaseLib/X64/WriteLdtr.nasm
@@ -0,0 +1,38 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, 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
+; 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:
+;
+;   WriteLdtr.Asm
+;
+; Abstract:
+;
+;   AsmWriteLdtr function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; AsmWriteLdtr (
+;   IN UINT16 Ldtr
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(AsmWriteLdtr)
+ASM_PFX(AsmWriteLdtr):
+    lldt    cx
+    ret
+