1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
; $Id: bs3-mode-SwitchTo32BitAndCallC.asm $
;; @file
; BS3Kit - bs3SwitchTo32BitAndCallC
;
;
; Copyright (C) 2007-2023 Oracle and/or its affiliates.
;
; This file is part of VirtualBox base platform packages, as
; available from https://www.virtualbox.org.
;
; 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, in version 3 of the
; License.
;
; 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, see <https://www.gnu.org/licenses>.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
; in the VirtualBox 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.
;
; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
;
;*********************************************************************************************************************************
;* 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
|
