1 /** @file 2 AsmReadGdtr function 3 4 Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> 5 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 "BaseLibInternals.h" 17 18 19 /** 20 Reads the current Global Descriptor Table Register(GDTR) descriptor. 21 22 Reads and returns the current GDTR descriptor and returns it in Gdtr. This 23 function is only available on IA-32 and x64. 24 25 @param Gdtr The pointer to a GDTR descriptor. 26 27 **/ 28 VOID 29 EFIAPI 30 InternalX86ReadGdtr ( 31 OUT IA32_DESCRIPTOR *Gdtr 32 ) 33 { 34 _asm { 35 mov eax, Gdtr 36 sgdt fword ptr [eax] 37 } 38 } 39 40
