MdePkg/Library/BaseLib/x86ReadGdtr.c

   1 /** @file
   2   IA-32/x64 AsmReadGdtr()
   3
   4   Copyright (c) 2006, Intel Corporation<BR>
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 //
  16 // Include common header file for this module.
  17 //
  18
  19
  20 #include "BaseLibInternals.h"
  21
  22 /**
  23   Reads the current Global Descriptor Table Register(GDTR) descriptor.
  24
  25   Reads and returns the current GDTR descriptor and returns it in Gdtr. This
  26   function is only available on IA-32 and X64.
  27
  28   If Gdtr is NULL, then ASSERT().
  29
  30   @param  Gdtr  Pointer to a GDTR descriptor.
  31
  32 **/
  33 VOID
  34 EFIAPI
  35 AsmReadGdtr (
  36   OUT     IA32_DESCRIPTOR           *Gdtr
  37   )
  38 {
  39   ASSERT (Gdtr != NULL);
  40   InternalX86ReadGdtr (Gdtr);
  41 }