| [32] | 1 | /* $Id: stacktoflat.h,v 1.1.1.1 2003/07/02 13:56:58 eleph Exp $ */
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| 2 | /*
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| 3 | * Header for SS / DS conversion routines
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| 4 | *
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| 5 | * (C) 2000-2002 InnoTek Systemberatung GmbH
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| 6 | * (C) 2000-2001 Sander van Leeuwen (sandervl@xs4all.nl)
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| 7 | *
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| 8 | * This program is free software; you can redistribute it and/or
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| 9 | * modify it under the terms of the GNU General Public License as
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| 10 | * published by the Free Software Foundation; either version 2 of
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| 11 | * the License, or (at your option) any later version.
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| 12 | *
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| 13 | * This program is distributed in the hope that it will be useful,
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | * GNU General Public License for more details.
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| 17 | *
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| 18 | * You should have received a copy of the GNU General Public
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| 19 | * License along with this program; if not, write to the Free
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| 20 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
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| 21 | * USA.
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| 22 | *
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| 23 | */
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| 24 |
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| 25 | #ifndef __STACKTOFLAT_H__
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| 26 | #define __STACKTOFLAT_H__
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| 27 |
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| [655] | 28 | extern ULONG stacksel; //16 bits stack selector
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| 29 | #pragma aux stacksel "stacksel"
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| 30 |
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| 31 | extern ULONG stackbase; //32 bits stackbase
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| 32 | #pragma aux stackbase "stackbase"
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| 33 |
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| [32] | 34 | //Convert 16:16 stack based address to 0:32 flat addresss
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| 35 | #define __Stack16ToFlat(addr) (LINEAR)((ULONG)(addr&0xffff) + stackbase)
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| 36 |
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| 37 | // Convert 16:16 pointer to 16:32
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| 38 | char FAR48 *MAKE_FARPTR32(FARPTR16 addr1616);
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| 39 | #pragma aux MAKE_FARPTR32 = \
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| 40 | "movzx edx, ax" \
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| 41 | "shr eax, 16" \
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| 42 | "mov fs, ax" \
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| 43 | parm [eax] \
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| 44 | value [fs edx];
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| 45 |
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| 46 | //Only valid for pointer previously constructed by __Make48Pointer!!
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| 47 | //(upper 16 bits of 32 bits offset must be 0)
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| 48 | FARPTR16 MAKE_FARPTR16(void FAR48 *addr1632);
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| 49 | #pragma aux MAKE_FARPTR16 = \
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| 50 | "mov ax, gs" \
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| 51 | "shl eax, 16" \
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| 52 | "mov ax, dx" \
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| 53 | parm [gs edx] \
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| 54 | value [eax];
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| 55 |
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| 56 | FARPTR16 MAKE_FARPTR16_STACK(LINEAR offset);
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| 57 | #pragma aux MAKE_FARPTR16_STACK = \
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| 58 | "mov ax, ss" \
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| 59 | "shl eax, 16" \
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| 60 | "mov ax, dx" \
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| 61 | parm [edx] \
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| 62 | value [eax];
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| 63 |
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| 64 | char FAR48 *MAKE_FARPTR32_STACK(LINEAR offset);
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| 65 | #pragma aux MAKE_FARPTR32_STACK = \
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| 66 | "push ss" \
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| 67 | "pop fs" \
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| 68 | parm [eax] \
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| 69 | value [fs eax];
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| 70 |
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| 71 | #define MAKE_FP16(sel, offset) ((sel << 16) | (offset & 0xffff) )
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| 72 |
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| 73 | USHORT GETFARSEL(char FAR48 *addr1632);
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| 74 | #pragma aux GETFARSEL = \
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| 75 | "mov ax, gs" \
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| 76 | parm [gs edx] \
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| 77 | value [ax];
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| 78 |
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| 79 | ULONG GETFAROFFSET(char FAR48 *addr1632);
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| 80 | #pragma aux GETFAROFFSET = \
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| 81 | "mov eax, edx" \
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| 82 | parm [gs edx] \
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| 83 | value [eax];
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| 84 |
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| 85 | //SvL: Only works for DS & SS ptrs!
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| 86 | ULONG GETFLATPTR(char FAR48 *ptr);
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| 87 |
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| 88 | #define FLATPTR(a) GETFLATPTR((char FAR48 *)a)
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| 89 |
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| 90 | #define FlatToSel(addr32) ((stacksel << 16) | (((ULONG)addr32 - stackbase) & 0xffff))
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| 91 |
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| 92 | #endif
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