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/*
* Copyright (C) 2009 H. Peter Anvin <hpa@zytor.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
FILE_LICENCE ( GPL2_OR_LATER )
.text
.arch i386
.code16
/****************************************************************************
* Set/clear CF on the stack as appropriate, assumes stack is as it should
* be immediately before IRET
****************************************************************************
*/
.section ".text16", "ax", @progbits
.globl patch_cf
patch_cf:
pushw %bp
movw %sp, %bp
setc 8(%bp) /* Set/reset CF; clears PF, AF, ZF, SF */
popw %bp
ret
.size patch_cf, . - patch_cf
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