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[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / WriteIdtr.c

/** @file\r
  AsmWriteIdtr function\r
\r
  Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
  All rights reserved. This program and the accompanying materials\r
  are licensed and made available under the terms and conditions of the BSD License\r
  which accompanies this distribution.  The full text of the license may be found at\r
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
//\r
// Include common header file for this module.\r
//\r
#include <BaseLibInternals.h>\r
\r
/**\r
  Writes the current Interrupt Descriptor Table Register(GDTR) descriptor.\r
\r
  Writes the current IDTR descriptor and returns it in Idtr. This function is\r
  only available on IA-32 and X64.\r
\r
  @param  Idtr  Pointer to a IDTR descriptor.\r
\r
**/\r
VOID\r
EFIAPI\r
InternalX86WriteIdtr (\r
  IN      CONST IA32_DESCRIPTOR     *Idtr\r
  )\r
{\r
  _asm {\r
    mov     eax, Idtr\r
    lidt    fword ptr [eax]\r
  }\r
}\r
\r