MdePkg/Library/BaseLib/Ia32/WriteIdtr.c


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/** @file
  AsmWriteIdtr function

  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "BaseLibInternals.h"

/**
  Writes the current Interrupt Descriptor Table Register(GDTR) descriptor.

  Writes the current IDTR descriptor and returns it in Idtr. This function is
  only available on IA-32 and x64.

  @param  Idtr  The pointer to a IDTR descriptor.

**/
VOID
EFIAPI
InternalX86WriteIdtr (
  IN      CONST IA32_DESCRIPTOR  *Idtr
  )
{
  _asm {
    mov     eax, Idtr
    pushfd
    cli
    lidt    fword ptr [eax]
    popfd
  }
}