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

/** @file\r
  AsmReadCs 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
  Reads the current value of Code Segment Register (CS).\r
\r
  Reads and returns the current value of CS. This function is only available on\r
  IA-32 and x64.\r
\r
  @return The current value of CS.\r
\r
**/\r
UINT16\r
EFIAPI\r
AsmReadCs (\r
  VOID\r
  )\r
{\r
  __asm {\r
    xor     eax, eax\r
    mov     ax, cs\r
  }\r
}\r
Commit	Line	Data
e1f414b6	1	/** @file\r
	2	AsmReadCs 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
42eedea9	9	/**\r
	10	Reads the current value of Code Segment Register (CS).\r
	11	\r
	12	Reads and returns the current value of CS. This function is only available on\r
030cd1a2	13	IA-32 and x64.\r
42eedea9	14	\r
	15	@return The current value of CS.\r
	16	\r
	17	**/\r
e1f414b6	18	UINT16\r
	19	EFIAPI\r
	20	AsmReadCs (\r
	21	VOID\r
	22	)\r
	23	{\r
	24	__asm {\r
	25	xor eax, eax\r
	26	mov ax, cs\r
	27	}\r
	28	}\r