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

/** @file\r
  AsmWriteGdtr function\r
\r
  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include "BaseLibInternals.h"\r
\r
/**\r
  Writes the current Global Descriptor Table Register (GDTR) descriptor.\r
\r
  Writes and the current GDTR descriptor specified by Gdtr. This function is\r
  only available on IA-32 and x64.\r
\r
  @param  Gdtr  The pointer to a GDTR descriptor.\r
\r
**/\r
VOID\r
EFIAPI\r
InternalX86WriteGdtr (\r
  IN      CONST IA32_DESCRIPTOR  *Gdtr\r
  )\r
{\r
  _asm {\r
    mov     eax, Gdtr\r
    lgdt    fword ptr [eax]\r
  }\r
}\r
Commit	Line	Data
e1f414b6	1	/** @file\r
	2	AsmWriteGdtr function\r
	3	\r
bb817c56	4	Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
9344f092	5	SPDX-License-Identifier: BSD-2-Clause-Patent\r
e1f414b6	6	\r
	7	**/\r
	8	\r
47fc17d8	9	#include "BaseLibInternals.h"\r
f734a10a	10	\r
42eedea9	11	/**\r
	12	Writes the current Global Descriptor Table Register (GDTR) descriptor.\r
	13	\r
	14	Writes and the current GDTR descriptor specified by Gdtr. This function is\r
030cd1a2	15	only available on IA-32 and x64.\r
42eedea9	16	\r
2fc59a00	17	@param Gdtr The pointer to a GDTR descriptor.\r
42eedea9	18	\r
42eedea9	19	**/\r
e1f414b6	20	VOID\r
	21	EFIAPI\r
	22	InternalX86WriteGdtr (\r
2f88bd3a	23	IN CONST IA32_DESCRIPTOR *Gdtr\r
e1f414b6	24	)\r
	25	{\r
	26	_asm {\r
	27	mov eax, Gdtr\r
	28	lgdt fword ptr [eax]\r
	29	}\r
	30	}\r