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stacktoflat.h
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2002-04-26
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/* $Id: stacktoflat.h,v 1.2 2002/04/26 23:09:03 smilcke Exp $ */
//******************************************************************************
// Header for stack to flat macros
//
// Copyright 2000 Sander van Leeuwen (sandervl@xs4all.nl)
//
// 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., 675 Mass Ave, Cambridge, MA 02139,
// USA.
//
//******************************************************************************
#ifndef __STACKTOFLAT_H__
#define __STACKTOFLAT_H__
extern ULONG TKSSBase;
#pragma aux TKSSBase "TKSSBase"
extern ULONG stacksel; //16 bits stack selector
#pragma aux stacksel "stacksel"
extern ULONG stackbase; //32 bits stackbase
#pragma aux stackbase "stackbase"
extern ULONG GetTKSSBase();
#pragma aux GetTKSSBase "GetTKSSBase" \
value [eax];
#ifdef KEE
#define __StackToFlat(addr) (LINEAR)((unsigned long)(addr&0xffff) + stackbase)
#else
#define __StackToFlat(addr) (LINEAR)((unsigned long)(addr&0xffff) + *(unsigned long *)TKSSBase)
#endif
#define MAKE_FAR48(a) __Make48Pointer(a)
// Convert 16:16 pointer to 16:32
char __far *__Make48Pointer(unsigned long addr1616);
#pragma aux __Make48Pointer = \
"movzx edx, ax" \
"shr eax, 16" \
"mov fs, ax" \
parm [eax] \
value [fs edx];
#ifdef KEE
//Only valid for stack based pointer!!
#define __FlatToStack(addr32) ((stacksel << 16) | (((ULONG)addr32 - stackbase) & 0xffff))
#else
//Only valid for pointer previously constructed by __Make48Pointer!!
//(upper 16 bits of 32 bits offset must be 0)
FARPTR16 __Compress48Pointer(char FAR48 *addr1632);
#pragma aux __Compress48Pointer = \
"mov ax, gs" \
"shl eax, 16" \
"mov ax, dx" \
parm [gs edx] \
value [eax];
#endif
#define MAKE_FAR16(a) __Compress48Pointer((char FAR48 *)a)
USHORT GETFARSEL(char FAR48 *addr1632);
#pragma aux GETFARSEL = \
"mov ax, gs" \
parm [gs edx] \
value [ax];
ULONG GETFAROFFSET(char FAR48 *addr1632);
#pragma aux GETFAROFFSET = \
"mov eax, edx" \
parm [gs edx] \
value [eax];
//SvL: Only works for DS & SS ptrs!
ULONG GETFLATPTR(char FAR48 *ptr);
#define FLATPTR(a) GETFLATPTR((char FAR48 *)a)
#endif