audk/MdePkg/Library/BaseLib/Ia32/ReadCs.c

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/** @file
AsmReadCs function
Copyright (c) 2006 - 2008, Intel Corporation<BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
/**
Reads the current value of Code Segment Register (CS).
Reads and returns the current value of CS. This function is only available on
IA-32 and x64.
@return The current value of CS.
**/
UINT16
EFIAPI
AsmReadCs (
VOID
)
{
__asm {
xor eax, eax
mov ax, cs
}
}