| 1 | /* $Id: stacktoflat.h,v 1.1.1.1 2003/07/02 13:56:58 eleph Exp $ */
|
|---|
| 2 | /*
|
|---|
| 3 | * Header for SS / DS conversion routines
|
|---|
| 4 | *
|
|---|
| 5 | * (C) 2000-2002 InnoTek Systemberatung GmbH
|
|---|
| 6 | * (C) 2000-2001 Sander van Leeuwen (sandervl@xs4all.nl)
|
|---|
| 7 | *
|
|---|
| 8 | * This program is free software; you can redistribute it and/or
|
|---|
| 9 | * modify it under the terms of the GNU General Public License as
|
|---|
| 10 | * published by the Free Software Foundation; either version 2 of
|
|---|
| 11 | * the License, or (at your option) any later version.
|
|---|
| 12 | *
|
|---|
| 13 | * This program is distributed in the hope that it will be useful,
|
|---|
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 16 | * GNU General Public License for more details.
|
|---|
| 17 | *
|
|---|
| 18 | * You should have received a copy of the GNU General Public
|
|---|
| 19 | * License along with this program; if not, write to the Free
|
|---|
| 20 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
|
|---|
| 21 | * USA.
|
|---|
| 22 | *
|
|---|
| 23 | */
|
|---|
| 24 |
|
|---|
| 25 | #ifndef __STACKTOFLAT_H__
|
|---|
| 26 | #define __STACKTOFLAT_H__
|
|---|
| 27 |
|
|---|
| 28 | extern ULONG stacksel; //16 bits stack selector
|
|---|
| 29 | #pragma aux stacksel "stacksel"
|
|---|
| 30 |
|
|---|
| 31 | extern ULONG stackbase; //32 bits stackbase
|
|---|
| 32 | #pragma aux stackbase "stackbase"
|
|---|
| 33 |
|
|---|
| 34 | //Convert 16:16 stack based address to 0:32 flat addresss
|
|---|
| 35 | #define __Stack16ToFlat(addr) (LINEAR)((ULONG)(addr&0xffff) + stackbase)
|
|---|
| 36 |
|
|---|
| 37 | // Convert 16:16 pointer to 16:32
|
|---|
| 38 | char FAR48 *MAKE_FARPTR32(FARPTR16 addr1616);
|
|---|
| 39 | #pragma aux MAKE_FARPTR32 = \
|
|---|
| 40 | "movzx edx, ax" \
|
|---|
| 41 | "shr eax, 16" \
|
|---|
| 42 | "mov fs, ax" \
|
|---|
| 43 | parm [eax] \
|
|---|
| 44 | value [fs edx];
|
|---|
| 45 |
|
|---|
| 46 | //Only valid for pointer previously constructed by __Make48Pointer!!
|
|---|
| 47 | //(upper 16 bits of 32 bits offset must be 0)
|
|---|
| 48 | FARPTR16 MAKE_FARPTR16(void FAR48 *addr1632);
|
|---|
| 49 | #pragma aux MAKE_FARPTR16 = \
|
|---|
| 50 | "mov ax, gs" \
|
|---|
| 51 | "shl eax, 16" \
|
|---|
| 52 | "mov ax, dx" \
|
|---|
| 53 | parm [gs edx] \
|
|---|
| 54 | value [eax];
|
|---|
| 55 |
|
|---|
| 56 | FARPTR16 MAKE_FARPTR16_STACK(LINEAR offset);
|
|---|
| 57 | #pragma aux MAKE_FARPTR16_STACK = \
|
|---|
| 58 | "mov ax, ss" \
|
|---|
| 59 | "shl eax, 16" \
|
|---|
| 60 | "mov ax, dx" \
|
|---|
| 61 | parm [edx] \
|
|---|
| 62 | value [eax];
|
|---|
| 63 |
|
|---|
| 64 | char FAR48 *MAKE_FARPTR32_STACK(LINEAR offset);
|
|---|
| 65 | #pragma aux MAKE_FARPTR32_STACK = \
|
|---|
| 66 | "push ss" \
|
|---|
| 67 | "pop fs" \
|
|---|
| 68 | parm [eax] \
|
|---|
| 69 | value [fs eax];
|
|---|
| 70 |
|
|---|
| 71 | #define MAKE_FP16(sel, offset) ((sel << 16) | (offset & 0xffff) )
|
|---|
| 72 |
|
|---|
| 73 | USHORT GETFARSEL(char FAR48 *addr1632);
|
|---|
| 74 | #pragma aux GETFARSEL = \
|
|---|
| 75 | "mov ax, gs" \
|
|---|
| 76 | parm [gs edx] \
|
|---|
| 77 | value [ax];
|
|---|
| 78 |
|
|---|
| 79 | ULONG GETFAROFFSET(char FAR48 *addr1632);
|
|---|
| 80 | #pragma aux GETFAROFFSET = \
|
|---|
| 81 | "mov eax, edx" \
|
|---|
| 82 | parm [gs edx] \
|
|---|
| 83 | value [eax];
|
|---|
| 84 |
|
|---|
| 85 | //SvL: Only works for DS & SS ptrs!
|
|---|
| 86 | ULONG GETFLATPTR(char FAR48 *ptr);
|
|---|
| 87 |
|
|---|
| 88 | #define FLATPTR(a) GETFLATPTR((char FAR48 *)a)
|
|---|
| 89 |
|
|---|
| 90 | #define FlatToSel(addr32) ((stacksel << 16) | (((ULONG)addr32 - stackbase) & 0xffff))
|
|---|
| 91 |
|
|---|
| 92 | #endif
|
|---|
