2 files changed, 43 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf
index 6d1166e145..f2b8f4bf8b 100644
--- a/MdePkg/Library/BaseLib/BaseLib.inf
+++ b/MdePkg/Library/BaseLib/BaseLib.inf
@@ -513,6 +513,7 @@
   X64/WriteLdtr.asm | MSFT
   X64/ReadLdtr.nasm| MSFT
   X64/ReadLdtr.asm | MSFT
+  X64/WriteIdtr.nasm| MSFT
   X64/WriteIdtr.asm | MSFT
   X64/ReadIdtr.asm | MSFT
   X64/WriteGdtr.asm | MSFT
@@ -619,6 +620,7 @@
   X64/WriteLdtr.asm | INTEL
   X64/ReadLdtr.nasm| INTEL
   X64/ReadLdtr.asm | INTEL
+  X64/WriteIdtr.nasm| INTEL
   X64/WriteIdtr.asm | INTEL
   X64/ReadIdtr.asm | INTEL
   X64/WriteGdtr.asm | INTEL
diff --git a/MdePkg/Library/BaseLib/X64/WriteIdtr.nasm b/MdePkg/Library/BaseLib/X64/WriteIdtr.nasm
new file mode 100644
index 0000000000..24601b386f
--- /dev/null
+++ b/MdePkg/Library/BaseLib/X64/WriteIdtr.nasm
@@ -0,0 +1,41 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006 - 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
+; 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:
+;
+;   WriteIdtr.Asm
+;
+; Abstract:
+;
+;   AsmWriteIdtr function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+    DEFAULT REL
+    SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; InternalX86WriteIdtr (
+;   IN      CONST IA32_DESCRIPTOR     *Idtr
+;   );
+;------------------------------------------------------------------------------
+global ASM_PFX(InternalX86WriteIdtr)
+ASM_PFX(InternalX86WriteIdtr):
+    pushfq
+    cli
+    lidt    [rcx]
+    popfq
+    ret
+