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