libreoffice/basic/source/runtime/wnt.asm

;*************************************************************************
;
; DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
; 
; Copyright 2008 by Sun Microsystems, Inc.
;
; OpenOffice.org - a multi-platform office productivity suite
;
; $RCSfile: wnt.asm,v $
;
; $Revision: 1.4 $
;
; This file is part of OpenOffice.org.
;
; OpenOffice.org is free software: you can redistribute it and/or modify
; it under the terms of the GNU Lesser General Public License version 3
; only, as published by the Free Software Foundation.
;
; OpenOffice.org 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 Lesser General Public License version 3 for more details
; (a copy is included in the LICENSE file that accompanied this code).
;
; You should have received a copy of the GNU Lesser General Public License
; version 3 along with OpenOffice.org.  If not, see
; <http://www.openoffice.org/license.html>
; for a copy of the LGPLv3 License.
;
;*************************************************************************

;    Anmerkungen
;        Direktaufruf von C- und PASCAL-Routinen, Windows und OS/2
;
; Inhalt:
; type = CallXXX (far *pProc, char *pStack, short nStack)
;
; Kopie des Basic-Stacks (nStack Bytes) auf den C-Stack
; und Aufruf der Prozedur.

		.386

_TEXT		SEGMENT	DWORD PUBLIC 'CODE' USE32

		ASSUME 	CS:_TEXT

		PUBLIC	_CallINT@12
		PUBLIC	_CallLNG@12
		PUBLIC	_CallDBL@12
		PUBLIC	_CallSTR@12
		PUBLIC	_CallFIX@12

_CallINT@12	LABEL	byte
_CallLNG@12	LABEL	byte
_CallDBL@12	LABEL	byte
_CallSTR@12	LABEL	byte

_CallFIX@12:	PUSH	EBP
		MOV	EBP,ESP
		PUSH	ESI
		PUSH	EDI

		PUSH	ECX
		PUSH	EDX

		MOV	DX,DS
		MOVZX	EAX,WORD PTR [EBP+16] ; EAX == nStack
		SUB	ESP,EAX       ; Stack um nStack Bytes vergroessern
		MOV	EDI,ESP
		MOV	AX,SS
		MOV	ES,AX	      ; ES:EDI = Startadresse des fuer
				      ; Parameter reservierten Stackbereichs
		MOV	ESI,[EBP+12]  ; DS:ESI == pStack

		MOVZX	ECX,WORD PTR [EBP+16] ; ECX == nStack
		SHR	ECX,1
		CLD
		JCXZ	$1
	REP	MOVSW		      ; Stack uebernehmen
$1:		MOV	DS,DX
		CALL	DWORD PTR [EBP+8]	; Aufruf der Prozedur
		; CLI ; unter NT nicht erlaubt (privileged instruction)
		MOV	ESP,EBP
		SUB	ESP,16	      ; wegen gepushter Register
				      ; (ESI, EDI)
		; STI
		POP	EDX
		POP	ECX
		POP	EDI
		POP	ESI
		POP	EBP
		RET	12

_TEXT		ENDS

		END