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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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