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|
; $Id: bs3-mode-SwitchTo32BitAndCallC.asm $
;; @file
; BS3Kit - bs3SwitchTo32BitAndCallC
;
;
; Copyright (C) 2007-2019 Oracle Corporation
;
; This file is part of VirtualBox Open Source Edition (OSE), as
; available from http://www.virtualbox.org. This file is free software;
; you can redistribute it and/or modify it under the terms of the GNU
; General Public License (GPL) as published by the Free Software
; Foundation, in version 2 as it comes in the "COPYING" file of the
; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
; VirtualBox OSE distribution, in which case the provisions of the
; CDDL are applicable instead of those of the GPL.
;
; You may elect to license modified versions of this file under the
; terms and conditions of either the GPL or the CDDL or both.
;
;*********************************************************************************************************************************
;* Header Files *
;*********************************************************************************************************************************
%include "bs3kit-template-header.mac"
;*********************************************************************************************************************************
;* External Symbols *
;*********************************************************************************************************************************
BS3_EXTERN_DATA16 g_bBs3CurrentMode
TMPL_BEGIN_TEXT
%ifdef BS3_STRICT
BS3_EXTERN_CMN Bs3Panic
%endif
%if BS3_MODE_IS_RM_OR_V86(TMPL_MODE)
BS3_EXTERN_CMN Bs3SelRealModeCodeToFlat
%endif
%if TMPL_MODE == BS3_MODE_RM
extern NAME(Bs3SwitchToPE32_rm)
extern NAME(Bs3SwitchToRM_pe32)
%elif !BS3_MODE_IS_32BIT_CODE(TMPL_MODE)
BS3_EXTERN_CMN Bs3SwitchTo32Bit
%if BS3_MODE_IS_16BIT_CODE_NO_V86(TMPL_MODE)
extern _Bs3SwitchTo16Bit_c32
%elif BS3_MODE_IS_V86(TMPL_MODE)
extern _Bs3SwitchTo16BitV86_c32
%elif !BS3_MODE_IS_32BIT_CODE(TMPL_MODE)
extern _Bs3SwitchTo64_c32
%endif
%endif
;;
; @cproto BS3_MODE_PROTO_STUB(int, Bs3SwitchTo32BitAndCallC,(PFNBS3FARADDRCONV fpfnCall, unsigned cbParams, ...));
;
BS3_PROC_BEGIN_MODE Bs3SwitchTo32BitAndCallC, BS3_PBC_HYBRID
BS3_CALL_CONV_PROLOG 4
TONLY16 inc xBP
push xBP
mov xBP, xSP
push xSI
;
; Push the arguments first.
;
TONLY16 mov si, [xBP + xCB + cbCurRetAddr + sCB]
TNOT16 mov esi, [xBP + xCB + cbCurRetAddr + sCB]
%ifdef BS3_STRICT
test xSI, 3
jz .cbParams_ok
call Bs3Panic
.cbParams_ok:
cmp byte [BS3_DATA16_WRT(g_bBs3CurrentMode)], TMPL_MODE
je .mode_ok
call Bs3Panic
.mode_ok:
%endif
add xSI, sCB - 1 ; round it up to nearest push size / dword.
and xSI, ~(sCB - 1)
jz .done_pushing ; skip if zero
.push_more:
push xPRE [xBP + xCB + cbCurRetAddr + sCB + xCB + xSI - xCB]
sub xSI, xCB
jnz .push_more
mov xSI, xAX ; restore xSI
.done_pushing:
;
; Load fpfnCall into eax.
;
%if BS3_MODE_IS_RM_OR_V86(TMPL_MODE)
push sPRE [xBP + xCB + cbCurRetAddr]
BS3_CALL Bs3SelRealModeCodeToFlat, 1
add xSP, sCB
rol eax, 16
mov ax, dx
rol eax, 16
%else
mov eax, [xBP + xCB + cbCurRetAddr]
%endif
;
; Switch to 32-bit mode, if this is real mode pick PE32.
;
%if TMPL_MODE == BS3_MODE_RM
call NAME(Bs3SwitchToPE32_rm)
BS3_SET_BITS 32
%elif !BS3_MODE_IS_32BIT_CODE(TMPL_MODE)
call Bs3SwitchTo32Bit
BS3_SET_BITS 32
%endif
;
; Make the call.
;
call eax
;
; Return, preserving xAX.
;
%if BS3_MODE_IS_RM_OR_V86(TMPL_MODE)
mov edx, eax
shr edx, 16
%endif
%if TMPL_MODE == BS3_MODE_RM
call NAME(Bs3SwitchToRM_pe32)
%elif BS3_MODE_IS_16BIT_CODE_NO_V86(TMPL_MODE)
call _Bs3SwitchTo16Bit_c32
%elif BS3_MODE_IS_V86(TMPL_MODE)
call _Bs3SwitchTo16BitV86_c32
%elif !BS3_MODE_IS_32BIT_CODE(TMPL_MODE)
call _Bs3SwitchTo64_c32
%endif
BS3_SET_BITS TMPL_BITS
; Epilog.
lea xSP, [xBP - xCB]
pop xSI
pop xBP
TONLY16 dec xBP
BS3_CALL_CONV_EPILOG 4
BS3_HYBRID_RET
BS3_PROC_END_MODE Bs3SwitchTo32BitAndCallC
|
