| 1 | ; $Id: VBoxGuestA-os2.asm 62521 2016-07-22 19:16:33Z vboxsync $
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| 2 | ;; @file
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| 3 | ; VBoxGuest - OS/2 assembly file, the first file in the link.
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2007-2016 Oracle Corporation
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| 8 | ;
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| 9 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | ; available from http://www.virtualbox.org. This file is free software;
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| 11 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 12 | ; General Public License (GPL) as published by the Free Software
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| 13 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | ;
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| 17 | ; --------------------------------------------------------------------
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| 18 | ;
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| 19 | ; This code is based on:
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| 20 | ;
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| 21 | ; VBoxDrv - OS/2 assembly file, the first file in the link.
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| 22 | ;
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| 23 | ; Copyright (c) 2007-2010 knut st. osmundsen <bird-src-spam@anduin.net>
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| 24 | ;
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| 25 | ; Permission is hereby granted, free of charge, to any person
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| 26 | ; obtaining a copy of this software and associated documentation
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| 27 | ; files (the "Software"), to deal in the Software without
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| 28 | ; restriction, including without limitation the rights to use,
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| 29 | ; copy, modify, merge, publish, distribute, sublicense, and/or sell
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| 30 | ; copies of the Software, and to permit persons to whom the
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| 31 | ; Software is furnished to do so, subject to the following
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| 32 | ; conditions:
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| 33 | ;
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| 34 | ; The above copyright notice and this permission notice shall be
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| 35 | ; included in all copies or substantial portions of the Software.
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| 36 | ;
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| 37 | ; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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| 38 | ; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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| 39 | ; OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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| 40 | ; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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| 41 | ; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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| 42 | ; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 43 | ; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 44 | ; OTHER DEALINGS IN THE SOFTWARE.
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| 45 | ;
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| 46 |
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| 47 |
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| 48 | ;*******************************************************************************
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| 49 | ;* Header Files *
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| 50 | ;*******************************************************************************
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| 51 | %define RT_INCL_16BIT_SEGMENTS
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| 52 | %include "iprt/asmdefs.mac"
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| 53 | %include "iprt/err.mac"
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| 54 | %include "VBox/VBoxGuest.mac"
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| 55 |
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| 56 |
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| 57 | ;*******************************************************************************
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| 58 | ;* Structures and Typedefs *
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| 59 | ;*******************************************************************************
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| 60 | ;;
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| 61 | ; Request packet header.
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| 62 | struc PKTHDR
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| 63 | .cb resb 1
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| 64 | .unit resb 1
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| 65 | .cmd resb 1
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| 66 | .status resw 1
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| 67 | .res1 resd 1
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| 68 | .link resd 1
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| 69 | endstruc
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| 70 |
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| 71 |
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| 72 | ;;
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| 73 | ; Init request packet - input.
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| 74 | struc PKTINITIN
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| 75 | .cb resb 1
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| 76 | .unit resb 1
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| 77 | .cmd resb 1
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| 78 | .status resw 1
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| 79 | .res1 resd 1
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| 80 | .link resd 1
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| 81 |
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| 82 | .data_1 resb 1
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| 83 | .fpfnDevHlp resd 1
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| 84 | .fpszArgs resd 1
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| 85 | .data_2 resb 1
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| 86 | endstruc
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| 87 |
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| 88 | ;;
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| 89 | ; Init request packet - output.
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| 90 | struc PKTINITOUT
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| 91 | .cb resb 1
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| 92 | .unit resb 1
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| 93 | .cmd resb 1
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| 94 | .status resw 1
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| 95 | .res1 resd 1
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| 96 | .link resd 1
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| 97 |
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| 98 | .cUnits resb 1 ; block devs only.
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| 99 | .cbCode16 resw 1
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| 100 | .cbData16 resw 1
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| 101 | .fpaBPBs resd 1 ; block devs only.
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| 102 | .data_2 resb 1
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| 103 | endstruc
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| 104 |
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| 105 | ;;
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| 106 | ; Open request packet.
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| 107 | struc PKTOPEN
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| 108 | .cb resb 1
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| 109 | .unit resb 1
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| 110 | .cmd resb 1
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| 111 | .status resw 1
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| 112 | .res1 resd 1
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| 113 | .link resd 1
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| 114 | .sfn resw 1
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| 115 | endstruc
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| 116 |
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| 117 | ;;
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| 118 | ; Close request packet.
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| 119 | struc PKTCLOSE
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| 120 | .cb resb 1
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| 121 | .unit resb 1
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| 122 | .cmd resb 1
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| 123 | .status resw 1
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| 124 | .res1 resd 1
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| 125 | .link resd 1
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| 126 | .sfn resw 1
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| 127 | endstruc
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| 128 |
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| 129 | ;;
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| 130 | ; IOCtl request packet.
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| 131 | struc PKTIOCTL
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| 132 | .cb resb 1
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| 133 | .unit resb 1
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| 134 | .cmd resb 1
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| 135 | .status resw 1
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| 136 | .res1 resd 1
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| 137 | .link resd 1
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| 138 |
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| 139 | .cat resb 1
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| 140 | .fun resb 1
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| 141 | .pParm resd 1
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| 142 | .pData resd 1
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| 143 | .sfn resw 1
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| 144 | .cbParm resw 1
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| 145 | .cbData resw 1
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| 146 | endstruc
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| 147 |
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| 148 | ;;
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| 149 | ; Read/Write request packet
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| 150 | struc PKTRW
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| 151 | .cb resb 1
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| 152 | .unit resb 1
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| 153 | .cmd resb 1
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| 154 | .status resw 1
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| 155 | .res1 resd 1
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| 156 | .link resd 1
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| 157 |
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| 158 | .media resb 1
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| 159 | .PhysTrans resd 1
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| 160 | .cbTrans resw 1
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| 161 | .start resd 1
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| 162 | .sfn resw 1
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| 163 | endstruc
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| 164 |
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| 165 |
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| 166 | ;*******************************************************************************
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| 167 | ;* Defined Constants And Macros *
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| 168 | ;*******************************************************************************
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| 169 | ; Some devhdr.inc stuff.
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| 170 | %define DEVLEV_3 0180h
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| 171 | %define DEV_30 0800h
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| 172 | %define DEV_IOCTL 4000h
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| 173 | %define DEV_CHAR_DEV 8000h
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| 174 |
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| 175 | %define DEV_16MB 0002h
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| 176 | %define DEV_IOCTL2 0001h
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| 177 |
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| 178 | ; Some dhcalls.h stuff.
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| 179 | %define DevHlp_VirtToLin 05bh
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| 180 | %define DevHlp_SAVE_MESSAGE 03dh
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| 181 | %define DevHlp_EIO 031h
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| 182 | %define DevHlp_SetIRQ 01bh
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| 183 | %define DevHlp_PhysToVirt 015h
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| 184 |
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| 185 | ; Fast IOCtl category, also defined in VBoxGuest.h
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| 186 | %define VBOXGUEST_IOCTL_CATEGORY_FAST 0c3h
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| 187 |
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| 188 | ;;
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| 189 | ; Got some nasm/link trouble, so emit the stuff ourselves.
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| 190 | ; @param %1 Must be a GLOBALNAME.
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| 191 | %macro JMP32TO16 1
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| 192 | ;jmp far dword NAME(%1) wrt CODE16
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| 193 | db 066h
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| 194 | db 0eah
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| 195 | dw NAME(%1) wrt CODE16
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| 196 | dw CODE16
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| 197 | %endmacro
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| 198 |
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| 199 | ;;
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| 200 | ; Got some nasm/link trouble, so emit the stuff ourselves.
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| 201 | ; @param %1 Must be a GLOBALNAME.
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| 202 | %macro JMP16TO32 1
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| 203 | ;jmp far dword NAME(%1) wrt FLAT
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| 204 | db 066h
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| 205 | db 0eah
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| 206 | dd NAME(%1) ;wrt FLAT
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| 207 | dw TEXT32 wrt FLAT
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| 208 | %endmacro
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| 209 |
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| 210 |
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| 211 | ;*******************************************************************************
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| 212 | ;* External Symbols *
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| 213 | ;*******************************************************************************
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| 214 | segment CODE16
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| 215 | extern DOS16OPEN
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| 216 | extern DOS16CLOSE
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| 217 | extern DOS16WRITE
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| 218 | extern DOS16DEVIOCTL2
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| 219 | segment TEXT32
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| 220 | extern KernThunkStackTo32
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| 221 | extern KernThunkStackTo16
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| 222 |
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| 223 | extern NAME(vgdrvOS2Init)
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| 224 | extern NAME(vgdrvOS2Open)
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| 225 | extern NAME(vgdrvOS2Close)
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| 226 | extern NAME(vgdrvOS2IOCtl)
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| 227 | extern NAME(vgdrvOS2IOCtlFast)
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| 228 | extern NAME(vgdrvOS2IDCConnect)
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| 229 | extern NAME(VGDrvOS2IDCService)
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| 230 | extern NAME(vgdrvOS2ISR)
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| 231 |
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| 232 |
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| 233 | segment DATA16
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| 234 |
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| 235 | ;;
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| 236 | ; Device headers. The first one is the one we'll be opening and the
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| 237 | ; latter is only used for 32-bit initialization.
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| 238 | GLOBALNAME g_VBoxGuestHdr1
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| 239 | dw NAME(g_VBoxGuestHdr2) wrt DATA16 ; NextHeader.off
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| 240 | dw DATA16 ; NextHeader.sel
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| 241 | dw DEVLEV_3 | DEV_30 | DEV_CHAR_DEV | DEV_IOCTL; SDevAtt
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| 242 | dw NAME(VGDrvOS2Entrypoint) wrt CODE16 ; StrategyEP
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| 243 | dw NAME(VGDrvOS2IDC) wrt CODE16 ; IDCEP
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| 244 | db 'vboxgst$' ; DevName
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| 245 | dw 0 ; SDevProtCS
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| 246 | dw 0 ; SDevProtDS
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| 247 | dw 0 ; SDevRealCS
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| 248 | dw 0 ; SDevRealDS
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| 249 | dd DEV_16MB | DEV_IOCTL2 ; SDevCaps
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| 250 |
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| 251 | align 4
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| 252 | GLOBALNAME g_VBoxGuestHdr2
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| 253 | dd 0ffffffffh ; NextHeader (NIL)
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| 254 | dw DEVLEV_3 | DEV_30 | DEV_CHAR_DEV ; SDevAtt
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| 255 | dw NAME(vgdrvOS2InitEntrypoint) wrt CODE16 ; StrategyEP
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| 256 | dw 0 ; IDCEP
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| 257 | db 'vboxgs1$' ; DevName
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| 258 | dw 0 ; SDevProtCS
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| 259 | dw 0 ; SDevProtDS
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| 260 | dw 0 ; SDevRealCS
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| 261 | dw 0 ; SDevRealDS
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| 262 | dd DEV_16MB | DEV_IOCTL2 ; SDevCaps
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| 263 |
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| 264 |
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| 265 | ;; Tristate 32-bit initialization indicator [0 = need init, -1 = init failed, 1 init succeeded].
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| 266 | ; Check in the open path of the primary driver. The secondary driver will
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| 267 | ; open the primary one during it's init and thereby trigger the 32-bit init.
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| 268 | GLOBALNAME g_fInitialized
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| 269 | db 0
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| 270 |
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| 271 | align 4
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| 272 | ;; Pointer to the device helper service routine
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| 273 | ; This is set during the initialization of the 2nd device driver.
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| 274 | GLOBALNAME g_fpfnDevHlp
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| 275 | dd 0
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| 276 |
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| 277 |
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| 278 | ;; vgdrvFindAdapter Output
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| 279 | ; @{
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| 280 |
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| 281 | ;; The MMIO base of the VMMDev.
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| 282 | GLOBALNAME g_PhysMMIOBase
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| 283 | dd 0
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| 284 | ;; The size of the MMIO memory of the VMMDev.
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| 285 | GLOBALNAME g_cbMMIO
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| 286 | dd 0
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| 287 | ;; The I/O port base of the VMMDev.
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| 288 | GLOBALNAME g_IOPortBase
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| 289 | dw 0
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| 290 | ;; The VMMDev Interrupt Line.
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| 291 | GLOBALNAME g_bInterruptLine
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| 292 | db 0
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| 293 | ;; The PCI bus number returned by Find PCI Device.
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| 294 | GLOBALNAME g_bPciBusNo
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| 295 | db 0
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| 296 | ;; The PCI Device No / Function Number returned by Find PCI Device.
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| 297 | ; (The upper 5 bits is the number, and the lower 3 the function.)
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| 298 | GLOBALNAME g_bPciDevFunNo
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| 299 | db 0
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| 300 | ;; Flag that is set by the vboxgst$ init routine if VMMDev was found.
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| 301 | ; Both init routines must refuse loading the driver if the
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| 302 | ; device cannot be located.
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| 303 | GLOBALNAME g_fFoundAdapter
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| 304 | db 0
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| 305 | ;; @}
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| 306 |
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| 307 |
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| 308 | %ifdef DEBUG_READ
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| 309 | ;; Where we write to the log.
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| 310 | GLOBALNAME g_offLogHead
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| 311 | dw 0
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| 312 | ;; Where we read from the log.
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| 313 | GLOBALNAME g_offLogTail
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| 314 | dw 0
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| 315 | ;; The size of the log. (power of two!)
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| 316 | %define LOG_SIZE 16384
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| 317 | GLOBALNAME g_cchLogMax
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| 318 | dw LOG_SIZE
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| 319 | ;; The log buffer.
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| 320 | GLOBALNAME g_szLog
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| 321 | times LOG_SIZE db 0
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| 322 | %endif ; DEBUG_READ
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| 323 |
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| 324 |
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| 325 | ;
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| 326 | ; The init data.
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| 327 | ;
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| 328 | segment DATA16_INIT
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| 329 | GLOBALNAME g_InitDataStart
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| 330 |
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| 331 | ;; Far pointer to the device argument.
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| 332 | g_fpszArgs:
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| 333 | dd 0
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| 334 |
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| 335 | %if 0
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| 336 | ;; Message table for the Save_Message device helper.
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| 337 | GLOBALNAME g_MsgTab
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| 338 | dw 1178 ; MsgId - 'MSG_REPLACEMENT_STRING'.
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| 339 | dw 1 ; cMsgStrings
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| 340 | dw NAME(g_szInitText) ; MsgStrings[0]
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| 341 | dw seg NAME(g_szInitText)
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| 342 | %else
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| 343 | ;; Far pointer to DOS16WRITE (corrected set before called).
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| 344 | ; Just a temporary hack to work around a wlink issue.
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| 345 | GLOBALNAME g_fpfnDos16Write
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| 346 | dw DOS16WRITE
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| 347 | dw seg DOS16WRITE
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| 348 | %endif
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| 349 |
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| 350 | ;; Size of the text currently in the g_szInitText buffer.
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| 351 | GLOBALNAME g_cchInitText
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| 352 | dw 0
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| 353 | ;; The max size of text that can fit into the g_szInitText buffer.
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| 354 | GLOBALNAME g_cchInitTextMax
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| 355 | dw 512
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| 356 | ;; The init text buffer.
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| 357 | GLOBALNAME g_szInitText
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| 358 | times 512 db 0
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| 359 |
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| 360 | ;; Message string that's written on failure.
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| 361 | g_achLoadFailureMsg1:
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| 362 | db 0dh,0ah,'VBoxGuest: load failure no. '
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| 363 | g_cchLoadFailureMsg1 EQU $ - g_achLoadFailureMsg1
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| 364 | g_achLoadFailureMsg2:
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| 365 | db '!',0dh,0ah
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| 366 | g_cchLoadFailureMsg2 EQU $ - g_achLoadFailureMsg2
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| 367 |
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| 368 |
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| 369 | ;
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| 370 | ; The 16-bit code segment.
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| 371 | ;
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| 372 | segment CODE16
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| 373 |
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| 374 |
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| 375 | ;;
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| 376 | ; The strategy entry point (vboxdrv$).
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| 377 | ;
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| 378 | ; ss:bx -> request packet
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| 379 | ; ds:si -> device header
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| 380 | ;
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| 381 | ; Can clobber any registers it likes except SP.
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| 382 | ;
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| 383 | BEGINPROC VGDrvOS2Entrypoint
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| 384 | push ebp
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| 385 | mov ebp, esp
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| 386 | push es ; bp - 2
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| 387 | push bx ; bp - 4
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| 388 | and sp, 0fffch
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| 389 |
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| 390 | ;
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| 391 | ; Check for the most frequent first.
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| 392 | ;
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| 393 | cmp byte [es:bx + PKTHDR.cmd], 10h ; Generic IOCtl
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| 394 | jne near vgdrvOS2EP_NotGenIOCtl
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| 395 |
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| 396 |
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| 397 | ;
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| 398 | ; Generic I/O Control Request.
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| 399 | ;
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| 400 | vgdrvOS2EP_GenIOCtl:
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| 401 |
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| 402 | ; Fast IOCtl?
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| 403 | cmp byte [es:bx + PKTIOCTL.cat], VBOXGUEST_IOCTL_CATEGORY_FAST
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| 404 | jne vgdrvOS2EP_GenIOCtl_Other
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| 405 |
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| 406 | ;
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| 407 | ; Fast IOCtl.
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| 408 | ; DECLASM(int) vgdrvOS2IOCtlFast(uint16_t sfn, uint8_t iFunction, uint16_t *pcbParm)
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| 409 | ;
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| 410 | vgdrvOS2EP_GenIOCtl_Fast:
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| 411 | mov ax, [es:bx + PKTIOCTL.pData + 2] ; LDT selector to flat address.
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| 412 | shr ax, 3
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| 413 | shl eax, 16
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| 414 | mov ax, [es:bx + PKTIOCTL.pData]
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| 415 | push eax ; 08h - pointer to the rc buffer.
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| 416 |
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| 417 | ; function.
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| 418 | movzx edx, byte [es:bx + PKTIOCTL.fun]
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| 419 | push edx ; 04h
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| 420 |
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| 421 | ; system file number.
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| 422 | movzx eax, word [es:bx + PKTIOCTL.sfn]
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| 423 | push eax ; 00h
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| 424 |
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| 425 | JMP16TO32 vgdrvOS2EP_GenIOCtl_Fast_32
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| 426 | segment TEXT32
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| 427 | GLOBALNAME vgdrvOS2EP_GenIOCtl_Fast_32
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| 428 |
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| 429 | ; switch stack to 32-bit.
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| 430 | mov ax, DATA32 wrt FLAT
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| 431 | mov ds, ax
|
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| 432 | mov es, ax
|
|---|
| 433 | call KernThunkStackTo32
|
|---|
| 434 |
|
|---|
| 435 | ; call the C code (don't cleanup the stack).
|
|---|
| 436 | call NAME(vgdrvOS2IOCtlFast)
|
|---|
| 437 |
|
|---|
| 438 | ; switch back the stack.
|
|---|
| 439 | push eax
|
|---|
| 440 | call KernThunkStackTo16
|
|---|
| 441 | pop eax
|
|---|
| 442 |
|
|---|
| 443 | JMP32TO16 vgdrvOS2EP_GenIOCtl_Fast_32
|
|---|
| 444 | segment CODE16
|
|---|
| 445 | GLOBALNAME vgdrvOS2EP_GenIOCtl_Fast_16
|
|---|
| 446 |
|
|---|
| 447 | les bx, [bp - 4] ; Reload the packet pointer.
|
|---|
| 448 | or eax, eax
|
|---|
| 449 | jnz near vgdrvOS2EP_GeneralFailure
|
|---|
| 450 |
|
|---|
| 451 | ; setup output stuff.
|
|---|
| 452 | mov edx, esp
|
|---|
| 453 | mov eax, [ss:edx + 0ch] ; output sizes.
|
|---|
| 454 | mov [es:bx + PKTIOCTL.cbParm], eax ; update cbParm and cbData.
|
|---|
| 455 | mov word [es:bx + PKTHDR.status], 00100h ; done, ok.
|
|---|
| 456 |
|
|---|
| 457 | mov sp, bp
|
|---|
| 458 | pop ebp
|
|---|
| 459 | retf
|
|---|
| 460 |
|
|---|
| 461 | ;
|
|---|
| 462 | ; Other IOCtl (slow)
|
|---|
| 463 | ;
|
|---|
| 464 | vgdrvOS2EP_GenIOCtl_Other:
|
|---|
| 465 | mov eax, [es:bx + PKTIOCTL.cbParm] ; Load cbParm and cbData
|
|---|
| 466 | push eax ; 1eh - in/out data size.
|
|---|
| 467 | ; 1ch - in/out parameter size.
|
|---|
| 468 | push edx ; 18h - pointer to data size (filled in later).
|
|---|
| 469 | push ecx ; 14h - pointer to param size (filled in later).
|
|---|
| 470 |
|
|---|
| 471 | ; pData (convert to flat 32-bit)
|
|---|
| 472 | mov ax, word [es:bx + PKTIOCTL.pData + 2] ; selector
|
|---|
| 473 | cmp ax, 3 ; <= 3 -> nil selector...
|
|---|
| 474 | jbe .no_data
|
|---|
| 475 | movzx esi, word [es:bx + PKTIOCTL.pData] ; offset
|
|---|
| 476 | mov dl, DevHlp_VirtToLin
|
|---|
| 477 | call far [NAME(g_fpfnDevHlp)]
|
|---|
| 478 | jc near vgdrvOS2EP_GeneralFailure
|
|---|
| 479 | jmp .finish_data
|
|---|
| 480 | .no_data:
|
|---|
| 481 | xor eax, eax
|
|---|
| 482 | .finish_data:
|
|---|
| 483 | push eax ; 10h
|
|---|
| 484 |
|
|---|
| 485 | ; pParm (convert to flat 32-bit)
|
|---|
| 486 | mov ax, word [es:bx + PKTIOCTL.pParm + 2] ; selector
|
|---|
| 487 | cmp ax, 3 ; <= 3 -> nil selector...
|
|---|
| 488 | jbe .no_parm
|
|---|
| 489 | movzx esi, word [es:bx + PKTIOCTL.pParm] ; offset
|
|---|
| 490 | mov dl, DevHlp_VirtToLin
|
|---|
| 491 | call far [NAME(g_fpfnDevHlp)]
|
|---|
| 492 | jc near vgdrvOS2EP_GeneralFailure
|
|---|
| 493 | jmp .finish_parm
|
|---|
| 494 | .no_parm:
|
|---|
| 495 | xor eax, eax
|
|---|
| 496 | .finish_parm:
|
|---|
| 497 | push eax ; 0ch
|
|---|
| 498 |
|
|---|
| 499 | ; function.
|
|---|
| 500 | movzx edx, byte [es:bx + PKTIOCTL.fun]
|
|---|
| 501 | push edx ; 08h
|
|---|
| 502 |
|
|---|
| 503 | ; category.
|
|---|
| 504 | movzx ecx, byte [es:bx + PKTIOCTL.cat]
|
|---|
| 505 | push ecx ; 04h
|
|---|
| 506 |
|
|---|
| 507 | ; system file number.
|
|---|
| 508 | movzx eax, word [es:bx + PKTIOCTL.sfn]
|
|---|
| 509 | push eax ; 00h
|
|---|
| 510 |
|
|---|
| 511 | JMP16TO32 vgdrvOS2EP_GenIOCtl_Other_32
|
|---|
| 512 | segment TEXT32
|
|---|
| 513 | GLOBALNAME vgdrvOS2EP_GenIOCtl_Other_32
|
|---|
| 514 |
|
|---|
| 515 | ; switch stack to 32-bit.
|
|---|
| 516 | mov ax, DATA32 wrt FLAT
|
|---|
| 517 | mov ds, ax
|
|---|
| 518 | mov es, ax
|
|---|
| 519 | call KernThunkStackTo32
|
|---|
| 520 |
|
|---|
| 521 | ; update in/out parameter pointers
|
|---|
| 522 | lea eax, [esp + 1ch]
|
|---|
| 523 | mov [esp + 14h], eax
|
|---|
| 524 | lea edx, [esp + 1eh]
|
|---|
| 525 | mov [esp + 18h], edx
|
|---|
| 526 |
|
|---|
| 527 | ; call the C code (don't cleanup the stack).
|
|---|
| 528 | call NAME(vgdrvOS2IOCtl)
|
|---|
| 529 |
|
|---|
| 530 | ; switch back the stack.
|
|---|
| 531 | push eax
|
|---|
| 532 | call KernThunkStackTo16
|
|---|
| 533 | pop eax
|
|---|
| 534 |
|
|---|
| 535 | JMP32TO16 vgdrvOS2EP_GenIOCtl_Other_16
|
|---|
| 536 | segment CODE16
|
|---|
| 537 | GLOBALNAME vgdrvOS2EP_GenIOCtl_Other_16
|
|---|
| 538 |
|
|---|
| 539 | les bx, [bp - 4] ; Reload the packet pointer.
|
|---|
| 540 | or eax, eax
|
|---|
| 541 | jnz near vgdrvOS2EP_GeneralFailure
|
|---|
| 542 |
|
|---|
| 543 | ; setup output stuff.
|
|---|
| 544 | mov edx, esp
|
|---|
| 545 | mov eax, [ss:edx + 1ch] ; output sizes.
|
|---|
| 546 | mov [es:bx + PKTIOCTL.cbParm], eax ; update cbParm and cbData.
|
|---|
| 547 | mov word [es:bx + PKTHDR.status], 00100h ; done, ok.
|
|---|
| 548 |
|
|---|
| 549 | mov sp, bp
|
|---|
| 550 | pop ebp
|
|---|
| 551 | retf
|
|---|
| 552 |
|
|---|
| 553 |
|
|---|
| 554 | ;
|
|---|
| 555 | ; Less Performance Critical Requests.
|
|---|
| 556 | ;
|
|---|
| 557 | vgdrvOS2EP_NotGenIOCtl:
|
|---|
| 558 | cmp byte [es:bx + PKTHDR.cmd], 0dh ; Open
|
|---|
| 559 | je vgdrvOS2EP_Open
|
|---|
| 560 | cmp byte [es:bx + PKTHDR.cmd], 0eh ; Close
|
|---|
| 561 | je vgdrvOS2EP_Close
|
|---|
| 562 | cmp byte [es:bx + PKTHDR.cmd], 00h ; Init
|
|---|
| 563 | je vgdrvOS2EP_Init
|
|---|
| 564 | %ifdef DEBUG_READ
|
|---|
| 565 | cmp byte [es:bx + PKTHDR.cmd], 04h ; Read
|
|---|
| 566 | je near vgdrvOS2EP_Read
|
|---|
| 567 | %endif
|
|---|
| 568 | jmp near vgdrvOS2EP_NotSupported
|
|---|
| 569 |
|
|---|
| 570 |
|
|---|
| 571 | ;
|
|---|
| 572 | ; Open Request. w/ ring-0 init.
|
|---|
| 573 | ;
|
|---|
| 574 | vgdrvOS2EP_Open:
|
|---|
| 575 | cmp byte [NAME(g_fInitialized)], 1
|
|---|
| 576 | jne vgdrvOS2EP_OpenOther
|
|---|
| 577 |
|
|---|
| 578 | ; First argument, the system file number.
|
|---|
| 579 | movzx eax, word [es:bx + PKTOPEN.sfn]
|
|---|
| 580 | push eax
|
|---|
| 581 |
|
|---|
| 582 | JMP16TO32 vgdrvOS2EP_Open_32
|
|---|
| 583 | segment TEXT32
|
|---|
| 584 | GLOBALNAME vgdrvOS2EP_Open_32
|
|---|
| 585 |
|
|---|
| 586 | ; switch stack to 32-bit.
|
|---|
| 587 | mov ax, DATA32 wrt FLAT
|
|---|
| 588 | mov ds, ax
|
|---|
| 589 | mov es, ax
|
|---|
| 590 | call KernThunkStackTo32
|
|---|
| 591 |
|
|---|
| 592 | ; call the C code.
|
|---|
| 593 | call NAME(vgdrvOS2Open)
|
|---|
| 594 |
|
|---|
| 595 | ; switch back the stack.
|
|---|
| 596 | push eax
|
|---|
| 597 | call KernThunkStackTo16
|
|---|
| 598 | pop eax
|
|---|
| 599 |
|
|---|
| 600 | JMP32TO16 vgdrvOS2EP_Open_16
|
|---|
| 601 | segment CODE16
|
|---|
| 602 | GLOBALNAME vgdrvOS2EP_Open_16
|
|---|
| 603 |
|
|---|
| 604 | les bx, [bp - 4] ; Reload the packet pointer.
|
|---|
| 605 | or eax, eax
|
|---|
| 606 | jnz near vgdrvOS2EP_GeneralFailure
|
|---|
| 607 | mov word [es:bx + PKTHDR.status], 00100h ; done, ok.
|
|---|
| 608 | jmp near vgdrvOS2EP_Done
|
|---|
| 609 |
|
|---|
| 610 | ; Initializing or failed init?
|
|---|
| 611 | vgdrvOS2EP_OpenOther:
|
|---|
| 612 | cmp byte [NAME(g_fInitialized)], 0
|
|---|
| 613 | jne vgdrvOS2EP_OpenFailed
|
|---|
| 614 |
|
|---|
| 615 | mov byte [NAME(g_fInitialized)], -1
|
|---|
| 616 | call NAME(vgdrvRing0Init)
|
|---|
| 617 | cmp byte [NAME(g_fInitialized)], 1
|
|---|
| 618 | je vgdrvOS2EP_Open
|
|---|
| 619 |
|
|---|
| 620 | vgdrvOS2EP_OpenFailed:
|
|---|
| 621 | mov word [es:bx + PKTHDR.status], 0810fh ; error, done, init failed.
|
|---|
| 622 | jmp near vgdrvOS2EP_Done
|
|---|
| 623 |
|
|---|
| 624 |
|
|---|
| 625 | ;
|
|---|
| 626 | ; Close Request.
|
|---|
| 627 | ;
|
|---|
| 628 | vgdrvOS2EP_Close:
|
|---|
| 629 | ; First argument, the system file number.
|
|---|
| 630 | movzx eax, word [es:bx + PKTOPEN.sfn]
|
|---|
| 631 | push eax
|
|---|
| 632 |
|
|---|
| 633 | JMP16TO32 vgdrvOS2EP_Close_32
|
|---|
| 634 | segment TEXT32
|
|---|
| 635 | GLOBALNAME vgdrvOS2EP_Close_32
|
|---|
| 636 |
|
|---|
| 637 | ; switch stack to 32-bit.
|
|---|
| 638 | mov ax, DATA32 wrt FLAT
|
|---|
| 639 | mov ds, ax
|
|---|
| 640 | mov es, ax
|
|---|
| 641 | call KernThunkStackTo32
|
|---|
| 642 |
|
|---|
| 643 | ; call the C code.
|
|---|
| 644 | call NAME(vgdrvOS2Close)
|
|---|
| 645 |
|
|---|
| 646 | ; switch back the stack.
|
|---|
| 647 | push eax
|
|---|
| 648 | call KernThunkStackTo16
|
|---|
| 649 | pop eax
|
|---|
| 650 |
|
|---|
| 651 | JMP32TO16 vgdrvOS2EP_Close_16
|
|---|
| 652 | segment CODE16
|
|---|
| 653 | GLOBALNAME vgdrvOS2EP_Close_16
|
|---|
| 654 |
|
|---|
| 655 | les bx, [bp - 4] ; Reload the packet pointer.
|
|---|
| 656 | or eax, eax
|
|---|
| 657 | jnz near vgdrvOS2EP_GeneralFailure
|
|---|
| 658 | mov word [es:bx + PKTHDR.status], 00100h ; done, ok.
|
|---|
| 659 | jmp near vgdrvOS2EP_Done
|
|---|
| 660 |
|
|---|
| 661 |
|
|---|
| 662 | ;
|
|---|
| 663 | ; Init Request.
|
|---|
| 664 | ; Find the VMMDev adapter so we can unload the driver (and avoid trouble) if not found.
|
|---|
| 665 | ;
|
|---|
| 666 | vgdrvOS2EP_Init:
|
|---|
| 667 | call NAME(vgdrvFindAdapter)
|
|---|
| 668 | test ax, ax
|
|---|
| 669 | jz .ok
|
|---|
| 670 | mov word [es:bx + PKTHDR.status], 0810fh ; error, done, init failed.
|
|---|
| 671 | call NAME(vgdrvOS2InitFlushText)
|
|---|
| 672 | jmp .next
|
|---|
| 673 | .ok:
|
|---|
| 674 | mov word [es:bx + PKTHDR.status], 00100h ; done, ok.
|
|---|
| 675 | .next:
|
|---|
| 676 | mov byte [es:bx + PKTINITOUT.cUnits], 0
|
|---|
| 677 | mov word [es:bx + PKTINITOUT.cbCode16], NAME(g_InitCodeStart) wrt CODE16
|
|---|
| 678 | mov word [es:bx + PKTINITOUT.cbData16], NAME(g_InitDataStart) wrt DATA16
|
|---|
| 679 | mov dword [es:bx + PKTINITOUT.fpaBPBs], 0
|
|---|
| 680 | jmp near vgdrvOS2EP_Done
|
|---|
| 681 |
|
|---|
| 682 |
|
|---|
| 683 | %ifdef DEBUG_READ
|
|---|
| 684 | ;
|
|---|
| 685 | ; Read Request.
|
|---|
| 686 | ; Return log data.
|
|---|
| 687 | ;
|
|---|
| 688 | vgdrvOS2EP_Read:
|
|---|
| 689 | ; Any log data available?
|
|---|
| 690 | xor dx, dx
|
|---|
| 691 | mov ax, [NAME(g_offLogTail)]
|
|---|
| 692 | cmp ax, [NAME(g_offLogHead)]
|
|---|
| 693 | jz near .log_done
|
|---|
| 694 |
|
|---|
| 695 | ; create a temporary mapping of the physical buffer. Docs claims it trashes nearly everything...
|
|---|
| 696 | push ebp
|
|---|
| 697 | mov cx, [es:bx + PKTRW.cbTrans]
|
|---|
| 698 | push cx
|
|---|
| 699 | mov ax, [es:bx + PKTRW.PhysTrans + 2]
|
|---|
| 700 | mov bx, [es:bx + PKTRW.PhysTrans]
|
|---|
| 701 | mov dh, 1
|
|---|
| 702 | mov dl, DevHlp_PhysToVirt
|
|---|
| 703 | call far [NAME(g_fpfnDevHlp)]
|
|---|
| 704 | pop bx ; bx = cbTrans
|
|---|
| 705 | pop ebp
|
|---|
| 706 | jc near .log_phystovirt_failed
|
|---|
| 707 | ; es:di -> the output buffer.
|
|---|
| 708 |
|
|---|
| 709 | ; setup the copy operation.
|
|---|
| 710 | mov ax, [NAME(g_offLogTail)]
|
|---|
| 711 | xor dx, dx ; dx tracks the number of bytes copied.
|
|---|
| 712 | .log_loop:
|
|---|
| 713 | mov cx, [NAME(g_offLogHead)]
|
|---|
| 714 | cmp ax, cx
|
|---|
| 715 | je .log_done
|
|---|
| 716 | jb .log_loop_before
|
|---|
| 717 | mov cx, LOG_SIZE
|
|---|
| 718 | .log_loop_before: ; cx = end offset
|
|---|
| 719 | sub cx, ax ; cx = sequential bytes to copy.
|
|---|
| 720 | cmp cx, bx
|
|---|
| 721 | jbe .log_loop_min
|
|---|
| 722 | mov cx, bx ; output buffer is smaller than available data.
|
|---|
| 723 | .log_loop_min:
|
|---|
| 724 | mov si, NAME(g_szLog)
|
|---|
| 725 | add si, ax ; ds:si -> the log buffer.
|
|---|
| 726 | add dx, cx ; update output counter
|
|---|
| 727 | add ax, cx ; calc new offLogTail
|
|---|
| 728 | and ax, LOG_SIZE - 1
|
|---|
| 729 | rep movsb ; do the copy
|
|---|
| 730 | mov [NAME(g_offLogTail)], ax ; commit the read.
|
|---|
| 731 | jmp .log_loop
|
|---|
| 732 |
|
|---|
| 733 | .log_done:
|
|---|
| 734 | les bx, [bp - 4] ; Reload the packet pointer.
|
|---|
| 735 | mov word [es:bx + PKTRW.cbTrans], dx
|
|---|
| 736 | mov word [es:bx + PKTHDR.status], 00100h ; done, ok.
|
|---|
| 737 | jmp near vgdrvOS2EP_Done
|
|---|
| 738 |
|
|---|
| 739 | .log_phystovirt_failed:
|
|---|
| 740 | les bx, [bp - 4] ; Reload the packet pointer.
|
|---|
| 741 | jmp vgdrvOS2EP_GeneralFailure
|
|---|
| 742 | %endif ; DEBUG_READ
|
|---|
| 743 |
|
|---|
| 744 |
|
|---|
| 745 | ;
|
|---|
| 746 | ; Return 'unknown command' error.
|
|---|
| 747 | ;
|
|---|
| 748 | vgdrvOS2EP_NotSupported:
|
|---|
| 749 | mov word [es:bx + PKTHDR.status], 08103h ; error, done, unknown command.
|
|---|
| 750 | jmp vgdrvOS2EP_Done
|
|---|
| 751 |
|
|---|
| 752 | ;
|
|---|
| 753 | ; Return 'general failure' error.
|
|---|
| 754 | ;
|
|---|
| 755 | vgdrvOS2EP_GeneralFailure:
|
|---|
| 756 | mov word [es:bx + PKTHDR.status], 0810ch ; error, done, general failure.
|
|---|
| 757 | jmp vgdrvOS2EP_Done
|
|---|
| 758 |
|
|---|
| 759 | ;
|
|---|
| 760 | ; Non-optimized return path.
|
|---|
| 761 | ;
|
|---|
| 762 | vgdrvOS2EP_Done:
|
|---|
| 763 | mov sp, bp
|
|---|
| 764 | pop ebp
|
|---|
| 765 | retf
|
|---|
| 766 | ENDPROC VGDrvOS2Entrypoint
|
|---|
| 767 |
|
|---|
| 768 |
|
|---|
| 769 | ;;
|
|---|
| 770 | ; The helper device entry point.
|
|---|
| 771 | ;
|
|---|
| 772 | ; This is only used to do the DosOpen on the main driver so we can
|
|---|
| 773 | ; do ring-3 init and report failures.
|
|---|
| 774 | ;
|
|---|
| 775 | GLOBALNAME vgdrvOS2InitEntrypoint
|
|---|
| 776 | ; The only request we're servicing is the 'init' one.
|
|---|
| 777 | cmp word [es:bx + PKTHDR.cmd], 0
|
|---|
| 778 | je near NAME(vgdrvOS2InitEntrypointServiceInitReq)
|
|---|
| 779 |
|
|---|
| 780 | ; Ok, it's not the init request, just fail it.
|
|---|
| 781 | mov word [es:bx + PKTHDR.status], 08103h ; error, done, unknown command.
|
|---|
| 782 | retf
|
|---|
| 783 |
|
|---|
| 784 |
|
|---|
| 785 | ;;
|
|---|
| 786 | ; The OS/2 IDC entry point.
|
|---|
| 787 | ;
|
|---|
| 788 | ; This is only used to setup connection, the returned structure
|
|---|
| 789 | ; will provide the entry points that we'll be using.
|
|---|
| 790 | ;
|
|---|
| 791 | ; @cproto void far __cdecl VGDrvOS2IDC(VBOXGUESTOS2IDCCONNECT far *fpConnectInfo);
|
|---|
| 792 | ;
|
|---|
| 793 | ; @param fpConnectInfo [bp + 8] Pointer to an VBOXGUESTOS2IDCCONNECT structure.
|
|---|
| 794 | ;
|
|---|
| 795 | GLOBALNAME VGDrvOS2IDC
|
|---|
| 796 | push ebp ; bp - 0h
|
|---|
| 797 | mov ebp, esp
|
|---|
| 798 | ; save everything we might touch.
|
|---|
| 799 | push es ; bp - 2h
|
|---|
| 800 | push ds ; bp - 4h
|
|---|
| 801 | push eax ; bp - 8h
|
|---|
| 802 | push ebx ; bp - 0ch
|
|---|
| 803 | push ecx ; bp - 10h
|
|---|
| 804 | push edx ; bp - 14h
|
|---|
| 805 | and sp, 0fffch
|
|---|
| 806 |
|
|---|
| 807 | JMP16TO32 VGDrvOS2IDC_32
|
|---|
| 808 | segment TEXT32
|
|---|
| 809 | GLOBALNAME VGDrvOS2IDC_32
|
|---|
| 810 |
|
|---|
| 811 | ; switch stack to 32-bit.
|
|---|
| 812 | mov ax, DATA32 wrt FLAT
|
|---|
| 813 | mov ds, ax
|
|---|
| 814 | mov es, ax
|
|---|
| 815 | call KernThunkStackTo32
|
|---|
| 816 |
|
|---|
| 817 | ; call the C code.
|
|---|
| 818 | call NAME(vgdrvOS2IDCConnect)
|
|---|
| 819 |
|
|---|
| 820 | ;
|
|---|
| 821 | ; Load the return buffer address into ds:ebx and setup the buffer.
|
|---|
| 822 | ; (eax == u32Session)
|
|---|
| 823 | ;
|
|---|
| 824 | mov cx, [ebp + 08h + 2]
|
|---|
| 825 | mov ds, cx
|
|---|
| 826 | movzx ebx, word [ebp + 08h]
|
|---|
| 827 |
|
|---|
| 828 | mov dword [ebx + VBGOS2IDC.u32Version ], VMMDEV_VERSION
|
|---|
| 829 | mov dword [ebx + VBGOS2IDC.u32Session ], eax
|
|---|
| 830 | mov dword [ebx + VBGOS2IDC.pfnServiceEP ], NAME(VGDrvOS2IDCService)
|
|---|
| 831 | mov word [ebx + VBGOS2IDC.fpfnServiceEP ], NAME(VGDrvOS2IDCService16) wrt CODE16
|
|---|
| 832 | mov word [ebx + VBGOS2IDC.fpfnServiceEP + 2], CODE16
|
|---|
| 833 | mov word [ebx + VBGOS2IDC.fpfnServiceAsmEP ], NAME(VGDrvOS2IDCService16Asm) wrt CODE16
|
|---|
| 834 | mov word [ebx + VBGOS2IDC.fpfnServiceAsmEP+2],CODE16
|
|---|
| 835 |
|
|---|
| 836 | mov ax, DATA32 wrt FLAT
|
|---|
| 837 | mov ds, ax
|
|---|
| 838 |
|
|---|
| 839 | ; switch back the stack.
|
|---|
| 840 | call KernThunkStackTo16
|
|---|
| 841 |
|
|---|
| 842 | JMP32TO16 VGDrvOS2IDC_16
|
|---|
| 843 | segment CODE16
|
|---|
| 844 | GLOBALNAME VGDrvOS2IDC_16
|
|---|
| 845 |
|
|---|
| 846 | ; restore.
|
|---|
| 847 | lea sp, [bp - 14h]
|
|---|
| 848 | pop edx
|
|---|
| 849 | pop ecx
|
|---|
| 850 | pop ebx
|
|---|
| 851 | pop eax
|
|---|
| 852 | pop ds
|
|---|
| 853 | pop es
|
|---|
| 854 | pop ebp
|
|---|
| 855 | retf
|
|---|
| 856 | ENDPROC VGDrvOS2IDC
|
|---|
| 857 |
|
|---|
| 858 |
|
|---|
| 859 | ;;
|
|---|
| 860 | ; The 16-bit IDC entry point, cdecl.
|
|---|
| 861 | ;
|
|---|
| 862 | ; All this does is thunking the request into something that fits
|
|---|
| 863 | ; the 32-bit IDC service routine.
|
|---|
| 864 | ;
|
|---|
| 865 | ;
|
|---|
| 866 | ; @returns VBox status code.
|
|---|
| 867 | ; @param u32Session bp + 8h - The above session handle.
|
|---|
| 868 | ; @param iFunction bp + 0ch - The requested function.
|
|---|
| 869 | ; @param pvData bp + 0eh - The input/output data buffer. The caller ensures that this
|
|---|
| 870 | ; cannot be swapped out, or that it's acceptable to take a
|
|---|
| 871 | ; page in fault in the current context. If the request doesn't
|
|---|
| 872 | ; take input or produces output, passing NULL is okay.
|
|---|
| 873 | ; @param cbData bp + 12h - The size of the data buffer.
|
|---|
| 874 | ; @param pcbDataReturned bp + 14h - Where to store the amount of data that's returned.
|
|---|
| 875 | ; This can be NULL if pvData is NULL.
|
|---|
| 876 | ;
|
|---|
| 877 | ; @cproto long far __cdecl VGDrvOS2IDCService16(uint32_t u32Session, uint16_t iFunction, void far *fpvData, uint16_t cbData, uint16_t far *pcbDataReturned);
|
|---|
| 878 | ;
|
|---|
| 879 | GLOBALNAME VGDrvOS2IDCService16
|
|---|
| 880 | push ebp ; bp - 0h
|
|---|
| 881 | mov ebp, esp
|
|---|
| 882 | push es ; bp - 2h
|
|---|
| 883 | push ds ; bp - 4h
|
|---|
| 884 | push ecx ; bp - 8h
|
|---|
| 885 | push edx ; bp - 0ch
|
|---|
| 886 | push esi ; bp - 10h
|
|---|
| 887 | and sp, 0fffch ; align the stack.
|
|---|
| 888 |
|
|---|
| 889 | ; locals
|
|---|
| 890 | push dword 0 ; esp + 18h (dd): cbDataReturned
|
|---|
| 891 |
|
|---|
| 892 | ; load our ds (for g_fpfnDevHlp).
|
|---|
| 893 | mov ax, DATA16
|
|---|
| 894 | mov ds, ax
|
|---|
| 895 |
|
|---|
| 896 | ;
|
|---|
| 897 | ; Create the call frame before switching.
|
|---|
| 898 | ;
|
|---|
| 899 | push dword 0 ; esp + 14h: &cbDataReturned (filled in after stack switch)
|
|---|
| 900 | movzx ecx, word [bp + 12h]
|
|---|
| 901 | push ecx ; esp + 10h: cbData
|
|---|
| 902 |
|
|---|
| 903 | ; thunk data argument if present.
|
|---|
| 904 | mov ax, [bp + 0eh + 2] ; selector
|
|---|
| 905 | cmp ax, 3 ; <= 3 -> nil selector...
|
|---|
| 906 | jbe .no_data
|
|---|
| 907 | movzx esi, word [bp + 0eh] ; offset
|
|---|
| 908 | mov dl, DevHlp_VirtToLin
|
|---|
| 909 | call far [NAME(g_fpfnDevHlp)]
|
|---|
| 910 | jc near VGDrvOS2IDCService16_InvalidPointer
|
|---|
| 911 | jmp .finish_data
|
|---|
| 912 | .no_data:
|
|---|
| 913 | xor eax, eax
|
|---|
| 914 | .finish_data:
|
|---|
| 915 | push eax ; esp + 08h: pvData
|
|---|
| 916 | movzx edx, word [bp + 0ch]
|
|---|
| 917 | push edx ; esp + 04h: iFunction
|
|---|
| 918 | mov ecx, [bp + 08h]
|
|---|
| 919 | push ecx ; esp + 00h: u32Session
|
|---|
| 920 |
|
|---|
| 921 | JMP16TO32 VGDrvOS2IDCService16_32
|
|---|
| 922 | segment TEXT32
|
|---|
| 923 | GLOBALNAME VGDrvOS2IDCService16_32
|
|---|
| 924 |
|
|---|
| 925 | ; switch stack to 32-bit.
|
|---|
| 926 | mov ax, DATA32 wrt FLAT
|
|---|
| 927 | mov ds, ax
|
|---|
| 928 | mov es, ax
|
|---|
| 929 | call KernThunkStackTo32
|
|---|
| 930 |
|
|---|
| 931 | ; update the cbDataReturned pointer
|
|---|
| 932 | lea eax, [esp + 18h]
|
|---|
| 933 | mov [esp + 14h], eax
|
|---|
| 934 |
|
|---|
| 935 | ; call the C code (don't cleanup the stack).
|
|---|
| 936 | call NAME(VGDrvOS2IDCService)
|
|---|
| 937 |
|
|---|
| 938 | ; switch back the stack.
|
|---|
| 939 | push eax
|
|---|
| 940 | call KernThunkStackTo16
|
|---|
| 941 | pop eax
|
|---|
| 942 |
|
|---|
| 943 | JMP32TO16 VGDrvOS2IDCService16_16
|
|---|
| 944 | segment CODE16
|
|---|
| 945 | GLOBALNAME VGDrvOS2IDCService16_16
|
|---|
| 946 |
|
|---|
| 947 | ; Set *pcbDataReturned.
|
|---|
| 948 | cmp word [bp + 14h + 2], 3
|
|---|
| 949 | jbe .no_pcbDataReturned
|
|---|
| 950 | xchg dx, bx
|
|---|
| 951 | mov cx, [esp + 18h]
|
|---|
| 952 | les bx, [bp + 14h]
|
|---|
| 953 | mov word [es:bx], cx
|
|---|
| 954 | xchg dx, bx
|
|---|
| 955 | .no_pcbDataReturned:
|
|---|
| 956 |
|
|---|
| 957 | VGDrvOS2IDCService16_Done:
|
|---|
| 958 | lea sp, [bp - 10h]
|
|---|
| 959 | pop esi
|
|---|
| 960 | pop edx
|
|---|
| 961 | pop ecx
|
|---|
| 962 | pop ds
|
|---|
| 963 | pop es
|
|---|
| 964 | pop ebp
|
|---|
| 965 | retf
|
|---|
| 966 |
|
|---|
| 967 | VGDrvOS2IDCService16_InvalidPointer:
|
|---|
| 968 | mov ax, VERR_INVALID_POINTER
|
|---|
| 969 | jmp VGDrvOS2IDCService16_Done
|
|---|
| 970 | ENDPROC VGDrvOS2IDCService16
|
|---|
| 971 |
|
|---|
| 972 |
|
|---|
| 973 | ;;
|
|---|
| 974 | ; The 16-bit IDC entry point, register based.
|
|---|
| 975 | ;
|
|---|
| 976 | ; This is just a wrapper around VGDrvOS2IDCService16 to simplify
|
|---|
| 977 | ; calls from 16-bit assembly code.
|
|---|
| 978 | ;
|
|---|
| 979 | ; @returns ax: VBox status code; cx: The amount of data returned.
|
|---|
| 980 | ;
|
|---|
| 981 | ; @param u32Session eax - The above session handle.
|
|---|
| 982 | ; @param iFunction dl - The requested function.
|
|---|
| 983 | ; @param pvData es:bx - The input/output data buffer.
|
|---|
| 984 | ; @param cbData cx - The size of the data buffer.
|
|---|
| 985 | ;
|
|---|
| 986 | GLOBALNAME VGDrvOS2IDCService16Asm
|
|---|
| 987 | push ebp ; bp - 0h
|
|---|
| 988 | mov ebp, esp
|
|---|
| 989 | push edx ; bp - 4h
|
|---|
| 990 | lea sp, [bp - 18h] ; allocate the call frame.
|
|---|
| 991 |
|
|---|
| 992 | ; bp - 06h (dw): oops...
|
|---|
| 993 | mov [bp - 08h], word 0 ; bp - 08h (dw): cbDataReturned
|
|---|
| 994 |
|
|---|
| 995 | mov [bp - 0eh], cx ; bp - 0eh (dw): cbData (NOTE: out of order to free up CX)
|
|---|
| 996 | lea cx, [bp - 08h] ; bp - 0ch (dd): &cbDataReturned
|
|---|
| 997 | mov [bp - 0ah], cx
|
|---|
| 998 | mov cx, ss
|
|---|
| 999 | mov [bp - 0ch], cx
|
|---|
| 1000 | mov [bp - 10h], bx ; bp - 10h (dd): pvData
|
|---|
| 1001 | mov cx, es
|
|---|
| 1002 | mov [bp - 12h], cx
|
|---|
| 1003 | mov [bp - 14h], dl ; bp - 14h (dw): iFunction
|
|---|
| 1004 | mov [bp - 13h], byte 0
|
|---|
| 1005 | mov [bp - 18h], eax ; bp - 18h (dd): u32Session
|
|---|
| 1006 |
|
|---|
| 1007 | call NAME(VGDrvOS2IDCService16)
|
|---|
| 1008 |
|
|---|
| 1009 | mov cx, [bp - 08h] ; cbDataReturned.
|
|---|
| 1010 |
|
|---|
| 1011 | mov edx, [bp - 4]
|
|---|
| 1012 | mov esp, ebp
|
|---|
| 1013 | pop ebp
|
|---|
| 1014 | retf
|
|---|
| 1015 | ENDPROC VGDrvOS2IDCService16Asm
|
|---|
| 1016 |
|
|---|
| 1017 |
|
|---|
| 1018 |
|
|---|
| 1019 | ;;
|
|---|
| 1020 | ; The 16-bit interrupt service routine.
|
|---|
| 1021 | ;
|
|---|
| 1022 | ; OS/2 saves all registers according to the docs, although it doesn't say whether
|
|---|
| 1023 | ; this includes the 32-bit parts. Since it doesn't cost much to be careful, save
|
|---|
| 1024 | ; everything.
|
|---|
| 1025 | ;
|
|---|
| 1026 | ; @returns CF=0 if it's our interrupt, CF=1 it it isn't.
|
|---|
| 1027 | ;
|
|---|
| 1028 | ;
|
|---|
| 1029 | GLOBALNAME vgdrvOS2ISR16
|
|---|
| 1030 | push ebp
|
|---|
| 1031 | mov ebp, esp
|
|---|
| 1032 | pushf ; bp - 02h
|
|---|
| 1033 | cli
|
|---|
| 1034 | push eax ; bp - 06h
|
|---|
| 1035 | push edx ; bp - 0ah
|
|---|
| 1036 | push ebx ; bp - 0eh
|
|---|
| 1037 | push ds ; bp - 10h
|
|---|
| 1038 | push es ; bp - 12h
|
|---|
| 1039 | push ecx ; bp - 16h
|
|---|
| 1040 | push esi ; bp - 1ah
|
|---|
| 1041 | push edi ; bp - 1eh
|
|---|
| 1042 |
|
|---|
| 1043 | and sp, 0fff0h ; align the stack (16-bytes make GCC extremely happy).
|
|---|
| 1044 |
|
|---|
| 1045 | JMP16TO32 vgdrvOS2ISR16_32
|
|---|
| 1046 | segment TEXT32
|
|---|
| 1047 | GLOBALNAME vgdrvOS2ISR16_32
|
|---|
| 1048 |
|
|---|
| 1049 | mov ax, DATA32 wrt FLAT
|
|---|
| 1050 | mov ds, ax
|
|---|
| 1051 | mov es, ax
|
|---|
| 1052 |
|
|---|
| 1053 | call KernThunkStackTo32
|
|---|
| 1054 |
|
|---|
| 1055 | call NAME(vgdrvOS2ISR)
|
|---|
| 1056 | mov ebx, eax
|
|---|
| 1057 |
|
|---|
| 1058 | call KernThunkStackTo16
|
|---|
| 1059 |
|
|---|
| 1060 | JMP32TO16 vgdrvOS2ISR16_16
|
|---|
| 1061 | segment CODE16
|
|---|
| 1062 | GLOBALNAME vgdrvOS2ISR16_16
|
|---|
| 1063 |
|
|---|
| 1064 | lea sp, [bp - 1eh]
|
|---|
| 1065 | pop edi
|
|---|
| 1066 | pop esi
|
|---|
| 1067 | pop ecx
|
|---|
| 1068 | pop es
|
|---|
| 1069 | pop ds
|
|---|
| 1070 | test bl, 0ffh
|
|---|
| 1071 | jnz .our
|
|---|
| 1072 | pop ebx
|
|---|
| 1073 | pop edx
|
|---|
| 1074 | pop eax
|
|---|
| 1075 | popf
|
|---|
| 1076 | pop ebp
|
|---|
| 1077 | stc
|
|---|
| 1078 | retf
|
|---|
| 1079 |
|
|---|
| 1080 | ;
|
|---|
| 1081 | ; Do EIO.
|
|---|
| 1082 | ;
|
|---|
| 1083 | .our:
|
|---|
| 1084 | mov al, [NAME(g_bInterruptLine)]
|
|---|
| 1085 | mov dl, DevHlp_EIO
|
|---|
| 1086 | call far [NAME(g_fpfnDevHlp)]
|
|---|
| 1087 |
|
|---|
| 1088 | pop ebx
|
|---|
| 1089 | pop edx
|
|---|
| 1090 | pop eax
|
|---|
| 1091 | popf
|
|---|
| 1092 | pop ebp
|
|---|
| 1093 | clc
|
|---|
| 1094 | retf
|
|---|
| 1095 | ENDPROC vgdrvOS2ISR16
|
|---|
| 1096 |
|
|---|
| 1097 |
|
|---|
| 1098 |
|
|---|
| 1099 |
|
|---|
| 1100 |
|
|---|
| 1101 |
|
|---|
| 1102 | ;
|
|---|
| 1103 | ; The 32-bit text segment.
|
|---|
| 1104 | ;
|
|---|
| 1105 | segment TEXT32
|
|---|
| 1106 | ;;
|
|---|
| 1107 | ; 32-bit worker for registering the ISR.
|
|---|
| 1108 | ;
|
|---|
| 1109 | ; @returns 0 on success, some non-zero OS/2 error code on failure.
|
|---|
| 1110 | ; @param bIrq [ebp + 8] The IRQ number. (uint8_t)
|
|---|
| 1111 | ;
|
|---|
| 1112 | GLOBALNAME vgdrvOS2DevHlpSetIRQ
|
|---|
| 1113 | push ebp
|
|---|
| 1114 | mov ebp, esp
|
|---|
| 1115 | push ebx
|
|---|
| 1116 | push ds
|
|---|
| 1117 |
|
|---|
| 1118 | call KernThunkStackTo16
|
|---|
| 1119 |
|
|---|
| 1120 | movzx ebx, byte [ebp + 8] ; load bIrq into BX.
|
|---|
| 1121 |
|
|---|
| 1122 | JMP32TO16 vgdrvOS2DevHlpSetIRQ_16
|
|---|
| 1123 | segment CODE16
|
|---|
| 1124 | GLOBALNAME vgdrvOS2DevHlpSetIRQ_16
|
|---|
| 1125 |
|
|---|
| 1126 | mov ax, DATA16 ; for g_fpfnDevHlp.
|
|---|
| 1127 | mov ds, ax
|
|---|
| 1128 | mov ax, NAME(vgdrvOS2ISR16) ; The devhlp assume it's relative to DS.
|
|---|
| 1129 | mov dh, 1 ; 1 = shared
|
|---|
| 1130 | mov dl, DevHlp_SetIRQ
|
|---|
| 1131 | call far [NAME(g_fpfnDevHlp)]
|
|---|
| 1132 | jnc .ok
|
|---|
| 1133 | movzx eax, ax
|
|---|
| 1134 | or eax, eax
|
|---|
| 1135 | jnz .go_back
|
|---|
| 1136 | or eax, 6
|
|---|
| 1137 | jmp .go_back
|
|---|
| 1138 | .ok:
|
|---|
| 1139 | xor eax, eax
|
|---|
| 1140 |
|
|---|
| 1141 | .go_back:
|
|---|
| 1142 | JMP16TO32 vgdrvOS2DevHlpSetIRQ_32
|
|---|
| 1143 | segment TEXT32
|
|---|
| 1144 | GLOBALNAME vgdrvOS2DevHlpSetIRQ_32
|
|---|
| 1145 |
|
|---|
| 1146 | pop ds ; KernThunkStackTo32 ASSUMES flat DS and ES.
|
|---|
| 1147 |
|
|---|
| 1148 | mov ebx, eax
|
|---|
| 1149 | call KernThunkStackTo32
|
|---|
| 1150 | mov eax, ebx
|
|---|
| 1151 |
|
|---|
| 1152 | pop ebx
|
|---|
| 1153 | pop ebp
|
|---|
| 1154 | ret
|
|---|
| 1155 | ENDPROC vgdrvOS2DevHlpSetIRQ
|
|---|
| 1156 |
|
|---|
| 1157 |
|
|---|
| 1158 |
|
|---|
| 1159 |
|
|---|
| 1160 | ;
|
|---|
| 1161 | ; The 16-bit init code.
|
|---|
| 1162 | ;
|
|---|
| 1163 | segment CODE16_INIT
|
|---|
| 1164 | GLOBALNAME g_InitCodeStart
|
|---|
| 1165 |
|
|---|
| 1166 | ;; The device name for DosOpen.
|
|---|
| 1167 | g_szDeviceName:
|
|---|
| 1168 | db '\DEV\vboxgst$', 0
|
|---|
| 1169 |
|
|---|
| 1170 | ; icsdebug can't see where stuff starts otherwise. (kDevTest)
|
|---|
| 1171 | int3
|
|---|
| 1172 | int3
|
|---|
| 1173 | int3
|
|---|
| 1174 | int3
|
|---|
| 1175 | int3
|
|---|
| 1176 | int3
|
|---|
| 1177 |
|
|---|
| 1178 | ;;
|
|---|
| 1179 | ; The Ring-3 init code.
|
|---|
| 1180 | ;
|
|---|
| 1181 | BEGINPROC vgdrvOS2InitEntrypointServiceInitReq
|
|---|
| 1182 | push ebp
|
|---|
| 1183 | mov ebp, esp
|
|---|
| 1184 | push es ; bp - 2
|
|---|
| 1185 | push sp ; bp - 4
|
|---|
| 1186 | push -1 ; bp - 6: hfOpen
|
|---|
| 1187 | push 0 ; bp - 8: usAction
|
|---|
| 1188 | and sp, 0fffch
|
|---|
| 1189 |
|
|---|
| 1190 | ; check for the init package.
|
|---|
| 1191 | cmp word [es:bx + PKTHDR.cmd], 0
|
|---|
| 1192 | jne near .not_init
|
|---|
| 1193 |
|
|---|
| 1194 | ; check that we found the VMMDev.
|
|---|
| 1195 | test byte [NAME(g_fFoundAdapter)], 1
|
|---|
| 1196 | jz near .done_err
|
|---|
| 1197 |
|
|---|
| 1198 | ;
|
|---|
| 1199 | ; Copy the data out of the init packet.
|
|---|
| 1200 | ;
|
|---|
| 1201 | mov eax, [es:bx + PKTINITIN.fpfnDevHlp]
|
|---|
| 1202 | mov [NAME(g_fpfnDevHlp)], eax
|
|---|
| 1203 | mov edx, [es:bx + PKTINITIN.fpszArgs]
|
|---|
| 1204 | mov [g_fpszArgs], edx
|
|---|
| 1205 |
|
|---|
| 1206 | ;
|
|---|
| 1207 | ; Open the first driver, close it, and check status.
|
|---|
| 1208 | ;
|
|---|
| 1209 |
|
|---|
| 1210 | ; APIRET _Pascal DosOpen(PSZ pszFname, PHFILE phfOpen, PUSHORT pusAction,
|
|---|
| 1211 | ; ULONG ulFSize, USHORT usAttr, USHORT fsOpenFlags,
|
|---|
| 1212 | ; USHORT fsOpenMode, ULONG ulReserved);
|
|---|
| 1213 | push seg g_szDeviceName ; pszFname
|
|---|
| 1214 | push g_szDeviceName
|
|---|
| 1215 | push ss ; phfOpen
|
|---|
| 1216 | lea dx, [bp - 6]
|
|---|
| 1217 | push dx
|
|---|
| 1218 | push ss ; pusAction
|
|---|
| 1219 | lea dx, [bp - 8]
|
|---|
| 1220 | push dx
|
|---|
| 1221 | push dword 0 ; ulFSize
|
|---|
| 1222 | push 0 ; usAttr = FILE_NORMAL
|
|---|
| 1223 | push 1 ; fsOpenFlags = FILE_OPEN
|
|---|
| 1224 | push 00040h ; fsOpenMode = OPEN_SHARE_DENYNONE | OPEN_ACCESS_READONLY
|
|---|
| 1225 | push dword 0 ; ulReserved
|
|---|
| 1226 | call far DOS16OPEN
|
|---|
| 1227 |
|
|---|
| 1228 | push ax ; Quickly flush any text.
|
|---|
| 1229 | call NAME(vgdrvOS2InitFlushText)
|
|---|
| 1230 | pop ax
|
|---|
| 1231 |
|
|---|
| 1232 | or ax, ax
|
|---|
| 1233 | jnz .done_err
|
|---|
| 1234 |
|
|---|
| 1235 | ; APIRET APIENTRY DosClose(HFILE hf);
|
|---|
| 1236 | mov cx, [bp - 6]
|
|---|
| 1237 | push cx
|
|---|
| 1238 | call far DOS16CLOSE
|
|---|
| 1239 | or ax, ax
|
|---|
| 1240 | jnz .done_err ; This can't happen (I hope).
|
|---|
| 1241 |
|
|---|
| 1242 | ;
|
|---|
| 1243 | ; Ok, we're good.
|
|---|
| 1244 | ;
|
|---|
| 1245 | mov word [es:bx + PKTHDR.status], 00100h ; done, ok.
|
|---|
| 1246 | mov byte [es:bx + PKTINITOUT.cUnits], 0
|
|---|
| 1247 | mov word [es:bx + PKTINITOUT.cbCode16], NAME(g_InitCodeStart) wrt CODE16
|
|---|
| 1248 | mov word [es:bx + PKTINITOUT.cbData16], NAME(g_InitDataStart) wrt DATA16
|
|---|
| 1249 | mov dword [es:bx + PKTINITOUT.fpaBPBs], 0
|
|---|
| 1250 | jmp .done
|
|---|
| 1251 |
|
|---|
| 1252 | ;
|
|---|
| 1253 | ; Init failure.
|
|---|
| 1254 | ;
|
|---|
| 1255 | .done_err:
|
|---|
| 1256 | mov word [es:bx + PKTHDR.status], 0810fh ; error, done, init failed.
|
|---|
| 1257 | mov byte [es:bx + PKTINITOUT.cUnits], 0
|
|---|
| 1258 | mov word [es:bx + PKTINITOUT.cbCode16], 0
|
|---|
| 1259 | mov word [es:bx + PKTINITOUT.cbData16], 0
|
|---|
| 1260 | mov dword [es:bx + PKTINITOUT.fpaBPBs], 0
|
|---|
| 1261 | jmp .done
|
|---|
| 1262 |
|
|---|
| 1263 | ;
|
|---|
| 1264 | ; Not init, return 'unknown command'.
|
|---|
| 1265 | ;
|
|---|
| 1266 | .not_init:
|
|---|
| 1267 | mov word [es:bx + PKTHDR.status], 08103h ; error, done, unknown command.
|
|---|
| 1268 | jmp .done
|
|---|
| 1269 |
|
|---|
| 1270 | ;
|
|---|
| 1271 | ; Request done.
|
|---|
| 1272 | ;
|
|---|
| 1273 | .done:
|
|---|
| 1274 | mov sp, bp
|
|---|
| 1275 | pop ebp
|
|---|
| 1276 | retf
|
|---|
| 1277 | ENDPROC vgdrvOS2InitEntrypointServiceInitReq
|
|---|
| 1278 |
|
|---|
| 1279 |
|
|---|
| 1280 | ;;
|
|---|
| 1281 | ; The Ring-0 init code.
|
|---|
| 1282 | ;
|
|---|
| 1283 | BEGINPROC vgdrvRing0Init
|
|---|
| 1284 | push es
|
|---|
| 1285 | push esi
|
|---|
| 1286 | push ebp
|
|---|
| 1287 | mov ebp, esp
|
|---|
| 1288 | and sp, 0fffch
|
|---|
| 1289 |
|
|---|
| 1290 | ;
|
|---|
| 1291 | ; Thunk the argument string pointer first.
|
|---|
| 1292 | ;
|
|---|
| 1293 | movzx esi, word [g_fpszArgs] ; offset
|
|---|
| 1294 | mov ax, [g_fpszArgs + 2] ; selector
|
|---|
| 1295 | mov dl, DevHlp_VirtToLin
|
|---|
| 1296 | call far [NAME(g_fpfnDevHlp)]
|
|---|
| 1297 | jc near vgdrvRing0Init_done ; eax is non-zero on failure (can't happen)
|
|---|
| 1298 | push eax ; 00h - pszArgs (for vgdrvOS2Init).
|
|---|
| 1299 |
|
|---|
| 1300 | ;
|
|---|
| 1301 | ; Do 16-bit init?
|
|---|
| 1302 | ;
|
|---|
| 1303 |
|
|---|
| 1304 |
|
|---|
| 1305 | ;
|
|---|
| 1306 | ; Do 32-bit init
|
|---|
| 1307 | ;
|
|---|
| 1308 | JMP16TO32 vgdrvRing0Init_32
|
|---|
| 1309 | segment TEXT32
|
|---|
| 1310 | GLOBALNAME vgdrvRing0Init_32
|
|---|
| 1311 |
|
|---|
| 1312 | ; switch stack to 32-bit.
|
|---|
| 1313 | mov ax, DATA32 wrt FLAT
|
|---|
| 1314 | mov ds, ax
|
|---|
| 1315 | mov es, ax
|
|---|
| 1316 | call KernThunkStackTo32
|
|---|
| 1317 |
|
|---|
| 1318 | ; call the C code.
|
|---|
| 1319 | call NAME(vgdrvOS2Init)
|
|---|
| 1320 |
|
|---|
| 1321 | ; switch back the stack and reload ds.
|
|---|
| 1322 | push eax
|
|---|
| 1323 | call KernThunkStackTo16
|
|---|
| 1324 | pop eax
|
|---|
| 1325 |
|
|---|
| 1326 | mov dx, seg NAME(g_fInitialized)
|
|---|
| 1327 | mov ds, dx
|
|---|
| 1328 |
|
|---|
| 1329 | JMP32TO16 vgdrvRing0Init_16
|
|---|
| 1330 | segment CODE16_INIT
|
|---|
| 1331 | GLOBALNAME vgdrvRing0Init_16
|
|---|
| 1332 |
|
|---|
| 1333 | ; check the result and set g_fInitialized on success.
|
|---|
| 1334 | or eax, eax
|
|---|
| 1335 | jnz vgdrvRing0Init_done
|
|---|
| 1336 | mov byte [NAME(g_fInitialized)], 1
|
|---|
| 1337 |
|
|---|
| 1338 | vgdrvRing0Init_done:
|
|---|
| 1339 | mov sp, bp
|
|---|
| 1340 | pop ebp
|
|---|
| 1341 | pop esi
|
|---|
| 1342 | pop es
|
|---|
| 1343 | ret
|
|---|
| 1344 | ENDPROC vgdrvRing0Init
|
|---|
| 1345 |
|
|---|
| 1346 |
|
|---|
| 1347 | ;;
|
|---|
| 1348 | ; Flush any text in the text buffer.
|
|---|
| 1349 | ;
|
|---|
| 1350 | BEGINPROC vgdrvOS2InitFlushText
|
|---|
| 1351 | push bp
|
|---|
| 1352 | mov bp, sp
|
|---|
| 1353 |
|
|---|
| 1354 | ; Anything in the buffer?
|
|---|
| 1355 | mov ax, [NAME(g_cchInitText)]
|
|---|
| 1356 | or ax, ax
|
|---|
| 1357 | jz .done
|
|---|
| 1358 |
|
|---|
| 1359 | %if 1
|
|---|
| 1360 | ; Write it to STDOUT.
|
|---|
| 1361 | ; APIRET _Pascal DosWrite(HFILE hf, PVOID pvBuf, USHORT cbBuf, PUSHORT pcbBytesWritten);
|
|---|
| 1362 | push ax ; bp - 2 : cbBytesWritten
|
|---|
| 1363 | mov cx, sp
|
|---|
| 1364 | push 1 ; STDOUT
|
|---|
| 1365 | push seg NAME(g_szInitText) ; pvBuf
|
|---|
| 1366 | push NAME(g_szInitText)
|
|---|
| 1367 | push ax ; cbBuf
|
|---|
| 1368 | push ss ; pcbBytesWritten
|
|---|
| 1369 | push cx
|
|---|
| 1370 | %if 0 ; wlink generates a non-aliased fixup here which results in 16-bit offset with the flat 32-bit selector.
|
|---|
| 1371 | call far DOS16WRITE
|
|---|
| 1372 | %else
|
|---|
| 1373 | ; convert flat pointer to a far pointer using the tiled algorithm.
|
|---|
| 1374 | push ds
|
|---|
| 1375 | mov ax, DATA32 wrt FLAT
|
|---|
| 1376 | mov ds, ax
|
|---|
| 1377 | mov eax, g_pfnDos16Write wrt FLAT
|
|---|
| 1378 | movzx eax, word [eax + 2] ; High word of the flat address (in DATA32).
|
|---|
| 1379 | shl ax, 3
|
|---|
| 1380 | or ax, 0007h
|
|---|
| 1381 | pop ds
|
|---|
| 1382 | mov [NAME(g_fpfnDos16Write) + 2], ax ; Update the selector (in DATA16_INIT).
|
|---|
| 1383 | ; do the call
|
|---|
| 1384 | call far [NAME(g_fpfnDos16Write)]
|
|---|
| 1385 | %endif
|
|---|
| 1386 |
|
|---|
| 1387 | %else ; alternative workaround for the wlink issue.
|
|---|
| 1388 | ; Use the save message devhlp.
|
|---|
| 1389 | push esi
|
|---|
| 1390 | push ebx
|
|---|
| 1391 | xor bx, bx
|
|---|
| 1392 | mov si, NAME(g_MsgTab)
|
|---|
| 1393 | mov dx, seg NAME(g_MsgTab)
|
|---|
| 1394 | mov ds, dx
|
|---|
| 1395 | mov dl, DevHlp_SAVE_MESSAGE
|
|---|
| 1396 | call far [NAME(g_fpfnDevHlp)]
|
|---|
| 1397 | pop ebx
|
|---|
| 1398 | pop esi
|
|---|
| 1399 | %endif
|
|---|
| 1400 |
|
|---|
| 1401 | ; Empty the buffer.
|
|---|
| 1402 | mov word [NAME(g_cchInitText)], 0
|
|---|
| 1403 | mov byte [NAME(g_szInitText)], 0
|
|---|
| 1404 |
|
|---|
| 1405 | .done:
|
|---|
| 1406 | mov sp, bp
|
|---|
| 1407 | pop bp
|
|---|
| 1408 | ret
|
|---|
| 1409 | ENDPROC vgdrvOS2InitFlushText
|
|---|
| 1410 |
|
|---|
| 1411 |
|
|---|
| 1412 | ;; The device name for DosOpen.
|
|---|
| 1413 | g_szOemHlpDevName:
|
|---|
| 1414 | db '\DEV\OEMHLP$', 0
|
|---|
| 1415 |
|
|---|
| 1416 |
|
|---|
| 1417 | ;;
|
|---|
| 1418 | ; Talks to OEMHLP$ about finding the VMMDev PCI adapter.
|
|---|
| 1419 | ;
|
|---|
| 1420 | ; On success g_fFoundAdapter is set to 1, and g_cbMMIO,
|
|---|
| 1421 | ; g_PhysMMIOBase and g_IOPortBase are initialized with
|
|---|
| 1422 | ; the PCI data.
|
|---|
| 1423 | ;
|
|---|
| 1424 | ; @returns 0 on success, non-zero on failure. (eax)
|
|---|
| 1425 | ;
|
|---|
| 1426 | ; @remark ASSUMES DS:DATA16.
|
|---|
| 1427 | ; @uses nothing.
|
|---|
| 1428 | ;
|
|---|
| 1429 | BEGINPROC vgdrvFindAdapter
|
|---|
| 1430 | push ebx
|
|---|
| 1431 | push ecx
|
|---|
| 1432 | push edx
|
|---|
| 1433 | push esi
|
|---|
| 1434 | push edi
|
|---|
| 1435 | push ebp
|
|---|
| 1436 | mov ebp, esp
|
|---|
| 1437 | push -1 ; bp - 2: hfOpen
|
|---|
| 1438 | %define hfOpen bp - 2
|
|---|
| 1439 | push 0 ; bp - 4: usAction
|
|---|
| 1440 | %define usAction bp - 4
|
|---|
| 1441 | sub sp, 20h ; bp - 44: 32 byte parameter buffer.
|
|---|
| 1442 | %define abParm bp - 24h
|
|---|
| 1443 | sub sp, 40h ; bp - c4: 32 byte data buffer.
|
|---|
| 1444 | %define abData bp - 44h
|
|---|
| 1445 |
|
|---|
| 1446 | ;; VBox stuff
|
|---|
| 1447 | %define VBOX_PCI_VENDORID 080eeh
|
|---|
| 1448 | %define VMMDEV_DEVICEID 0cafeh
|
|---|
| 1449 |
|
|---|
| 1450 | ;; OEMHLP$ stuff.
|
|---|
| 1451 | %define IOCTL_OEMHLP 80h
|
|---|
| 1452 | %define OEMHLP_PCI 0bh
|
|---|
| 1453 | %define PCI_FIND_DEVICE 1
|
|---|
| 1454 | %define PCI_READ_CONFIG 3
|
|---|
| 1455 |
|
|---|
| 1456 | ;; PCI stuff
|
|---|
| 1457 | %define PCI_INTERRUPT_LINE 03ch ;;< 8-bit RW - Interrupt line.
|
|---|
| 1458 | %define PCI_BASE_ADDRESS_0 010h ;;< 32-bit RW */
|
|---|
| 1459 | %define PCI_BASE_ADDRESS_1 014h ;;< 32-bit RW */
|
|---|
| 1460 |
|
|---|
| 1461 |
|
|---|
| 1462 | %macro CallIOCtl 2
|
|---|
| 1463 | ; APIRET _Pascal DosDevIOCtl2(PVOID pData, USHORT cbData, PVOID pParm,
|
|---|
| 1464 | ; USHORT cbParm, USHORT usFun, USHORT usCategory,
|
|---|
| 1465 | ; HFILE hDev);
|
|---|
| 1466 | push ss ; pData
|
|---|
| 1467 | lea dx, [abData]
|
|---|
| 1468 | push dx
|
|---|
| 1469 | push %2 ; cbData
|
|---|
| 1470 |
|
|---|
| 1471 | push ss ; pParm
|
|---|
| 1472 | lea dx, [abParm]
|
|---|
| 1473 | push dx
|
|---|
| 1474 | push %1 ; cbParm
|
|---|
| 1475 | push OEMHLP_PCI ; usFun
|
|---|
| 1476 | push IOCTL_OEMHLP ; usCategory
|
|---|
| 1477 |
|
|---|
| 1478 | mov ax, [hfOpen] ; hDev
|
|---|
| 1479 | push ax
|
|---|
| 1480 | call far DOS16DEVIOCTL2
|
|---|
| 1481 |
|
|---|
| 1482 | ; check for error.
|
|---|
| 1483 | test ax, ax
|
|---|
| 1484 | jnz near .done_err_close
|
|---|
| 1485 | cmp [abData + 0], byte 0
|
|---|
| 1486 | jne near .done_err_close
|
|---|
| 1487 | %endmacro
|
|---|
| 1488 |
|
|---|
| 1489 |
|
|---|
| 1490 | ;
|
|---|
| 1491 | ; Open the OEMHLP$ driver.
|
|---|
| 1492 | ;
|
|---|
| 1493 |
|
|---|
| 1494 | ; APIRET _Pascal DosOpen(PSZ pszFname, PHFILE phfOpen, PUSHORT pusAction,
|
|---|
| 1495 | ; ULONG ulFSize, USHORT usAttr, USHORT fsOpenFlags,
|
|---|
| 1496 | ; USHORT fsOpenMode, ULONG ulReserved);
|
|---|
| 1497 | mov di, '0'
|
|---|
| 1498 | push seg g_szOemHlpDevName ; pszFname
|
|---|
| 1499 | push g_szOemHlpDevName
|
|---|
| 1500 | push ss ; phfOpen
|
|---|
| 1501 | lea dx, [hfOpen]
|
|---|
| 1502 | push dx
|
|---|
| 1503 | push ss ; pusAction
|
|---|
| 1504 | lea dx, [usAction]
|
|---|
| 1505 | push dx
|
|---|
| 1506 | push dword 0 ; ulFSize
|
|---|
| 1507 | push 0 ; usAttr = FILE_NORMAL
|
|---|
| 1508 | push 1 ; fsOpenFlags = FILE_OPEN
|
|---|
| 1509 | push 00040h ; fsOpenMode = OPEN_SHARE_DENYNONE | OPEN_ACCESS_READONLY
|
|---|
| 1510 | push dword 0 ; ulReserved
|
|---|
| 1511 | call far DOS16OPEN
|
|---|
| 1512 | or ax, ax
|
|---|
| 1513 | jnz near .done
|
|---|
| 1514 |
|
|---|
| 1515 |
|
|---|
| 1516 | ;
|
|---|
| 1517 | ; Send a PCI_FIND_DEVICE request.
|
|---|
| 1518 | ;
|
|---|
| 1519 |
|
|---|
| 1520 | ; Initialize the parameter packet.
|
|---|
| 1521 | mov [abParm + 0], byte PCI_FIND_DEVICE ; 0 - db - SubFunction Number
|
|---|
| 1522 | mov [abParm + 1], word VMMDEV_DEVICEID ; 1 - dw - Device ID
|
|---|
| 1523 | mov [abParm + 3], word VBOX_PCI_VENDORID ; 3 - dw - Vendor ID
|
|---|
| 1524 | mov [abParm + 5], byte 0 ; 5 - db - (Device) Index
|
|---|
| 1525 |
|
|---|
| 1526 | ; Zero padd the data packet.
|
|---|
| 1527 | mov [abData + 0], dword 0
|
|---|
| 1528 |
|
|---|
| 1529 | mov di, '1'
|
|---|
| 1530 | CallIOCtl 6, 3
|
|---|
| 1531 |
|
|---|
| 1532 | mov al, [abData + 1] ; 1 - db - Bus Number.
|
|---|
| 1533 | mov [NAME(g_bPciBusNo)], al
|
|---|
| 1534 | mov al, [abData + 2] ; 2 - db - DevFunc Number.
|
|---|
| 1535 | mov [NAME(g_bPciDevFunNo)], al
|
|---|
| 1536 |
|
|---|
| 1537 | ;
|
|---|
| 1538 | ; Read the interrupt register (byte).
|
|---|
| 1539 | ;
|
|---|
| 1540 | mov di, '2'
|
|---|
| 1541 | mov ax, PCI_INTERRUPT_LINE | 0100h
|
|---|
| 1542 | call .NestedReadReg
|
|---|
| 1543 | mov [NAME(g_bInterruptLine)], al
|
|---|
| 1544 |
|
|---|
| 1545 | ;
|
|---|
| 1546 | ; Read the first base address (dword), this shall must be in I/O space.
|
|---|
| 1547 | ;
|
|---|
| 1548 | mov di, '3'
|
|---|
| 1549 | mov ax, PCI_BASE_ADDRESS_0 | 0400h
|
|---|
| 1550 | call .NestedReadReg
|
|---|
| 1551 | mov di, '4'
|
|---|
| 1552 | test al, 1h ; Test that it's an I/O space address.
|
|---|
| 1553 | jz .done_err_close
|
|---|
| 1554 | mov di, '5'
|
|---|
| 1555 | test eax, 0ffff0002h ; These shall all be 0 according to the specs.
|
|---|
| 1556 | jnz .done_err_close
|
|---|
| 1557 | and ax, 0fffeh
|
|---|
| 1558 | mov [NAME(g_IOPortBase)], ax
|
|---|
| 1559 |
|
|---|
| 1560 | ;
|
|---|
| 1561 | ; Read the second base address (dword), this shall be in memory space if present.
|
|---|
| 1562 | ;
|
|---|
| 1563 | mov di, '6'
|
|---|
| 1564 | mov ax, PCI_BASE_ADDRESS_1 | 0400h
|
|---|
| 1565 | call .NestedReadReg
|
|---|
| 1566 | mov di, '7'
|
|---|
| 1567 | test al, 1h ; Test that it's a memory space address.
|
|---|
| 1568 | jnz .done_err_close
|
|---|
| 1569 | and eax, 0fffffff0h
|
|---|
| 1570 | mov [NAME(g_PhysMMIOBase)], eax
|
|---|
| 1571 |
|
|---|
| 1572 | ;or eax, eax
|
|---|
| 1573 | ;jz .done_success ; No memory region.
|
|---|
| 1574 | ;; @todo If there is a simple way of determining the size do that, if
|
|---|
| 1575 | ; not we can easily handle it the code that does the actual mapping.
|
|---|
| 1576 |
|
|---|
| 1577 |
|
|---|
| 1578 | ;
|
|---|
| 1579 | ; Ok, we're good!
|
|---|
| 1580 | ;
|
|---|
| 1581 | .done_success:
|
|---|
| 1582 | or [NAME(g_fFoundAdapter)], byte 1
|
|---|
| 1583 | jmp .done_close
|
|---|
| 1584 |
|
|---|
| 1585 | ;
|
|---|
| 1586 | ; Close the OEMHLP$ driver.
|
|---|
| 1587 | ;
|
|---|
| 1588 | .done_err_close:
|
|---|
| 1589 | or ax, 80h
|
|---|
| 1590 | .done_close:
|
|---|
| 1591 | ; APIRET APIENTRY DosClose(HFILE hf);
|
|---|
| 1592 | push ax ; Save result
|
|---|
| 1593 | mov cx, [hfOpen]
|
|---|
| 1594 | push cx
|
|---|
| 1595 | call far DOS16CLOSE
|
|---|
| 1596 | or ax, ax
|
|---|
| 1597 | jnz .bitch ; This can't happen (I hope).
|
|---|
| 1598 | pop ax
|
|---|
| 1599 | or ax, ax
|
|---|
| 1600 | jnz .bitch
|
|---|
| 1601 |
|
|---|
| 1602 | ;
|
|---|
| 1603 | ; Return to vgdrvOS2EP_Init.
|
|---|
| 1604 | ;
|
|---|
| 1605 | .done:
|
|---|
| 1606 | mov esp, ebp
|
|---|
| 1607 | pop ebp
|
|---|
| 1608 | pop edi
|
|---|
| 1609 | pop esi
|
|---|
| 1610 | pop edx
|
|---|
| 1611 | pop ecx
|
|---|
| 1612 | pop ebx
|
|---|
| 1613 | ret
|
|---|
| 1614 |
|
|---|
| 1615 |
|
|---|
| 1616 | ;
|
|---|
| 1617 | ; Puts the reason for failure in message buffer.
|
|---|
| 1618 | ; The caller will flush this.
|
|---|
| 1619 | ;
|
|---|
| 1620 | .bitch:
|
|---|
| 1621 | push es
|
|---|
| 1622 |
|
|---|
| 1623 | mov ax, ds
|
|---|
| 1624 | mov es, ax
|
|---|
| 1625 | mov ax, di ; save the reason.
|
|---|
| 1626 | mov di, NAME(g_szInitText)
|
|---|
| 1627 | add di, [NAME(g_cchInitText)]
|
|---|
| 1628 |
|
|---|
| 1629 | mov si, g_achLoadFailureMsg1
|
|---|
| 1630 | mov cx, g_cchLoadFailureMsg1
|
|---|
| 1631 | rep movsb
|
|---|
| 1632 |
|
|---|
| 1633 | stosb
|
|---|
| 1634 |
|
|---|
| 1635 | mov si, g_achLoadFailureMsg2
|
|---|
| 1636 | mov cx, g_cchLoadFailureMsg2
|
|---|
| 1637 | rep movsb
|
|---|
| 1638 |
|
|---|
| 1639 | mov [di], byte 0
|
|---|
| 1640 | sub di, NAME(g_szInitText)
|
|---|
| 1641 | mov [NAME(g_cchInitText)], di
|
|---|
| 1642 |
|
|---|
| 1643 | pop es
|
|---|
| 1644 | jmp .done
|
|---|
| 1645 |
|
|---|
| 1646 |
|
|---|
| 1647 | ;
|
|---|
| 1648 | ; Nested function which reads a PCI config register.
|
|---|
| 1649 | ; (This operates on the vgdrvFindAdapter stack frame.)
|
|---|
| 1650 | ;
|
|---|
| 1651 | ; Input:
|
|---|
| 1652 | ; al - register to read
|
|---|
| 1653 | ; ah - register size.
|
|---|
| 1654 | ;
|
|---|
| 1655 | ; Output:
|
|---|
| 1656 | ; eax - the value.
|
|---|
| 1657 | ;
|
|---|
| 1658 | ; Uses:
|
|---|
| 1659 | ; dx
|
|---|
| 1660 | ;
|
|---|
| 1661 | .NestedReadReg:
|
|---|
| 1662 | ; Fill in the request packet.
|
|---|
| 1663 | mov [abParm + 0], byte PCI_READ_CONFIG ; 0 - db - SubFunction Number
|
|---|
| 1664 | mov dl, [NAME(g_bPciBusNo)]
|
|---|
| 1665 | mov [abParm + 1], dl ; 1 - db - Bus Number
|
|---|
| 1666 | mov dl, [NAME(g_bPciDevFunNo)]
|
|---|
| 1667 | mov [abParm + 2], dl ; 2 - db - DevFunc Number
|
|---|
| 1668 | mov [abParm + 3], al ; 3 - db - Configuration Register
|
|---|
| 1669 | mov [abParm + 4], ah ; 4 - db - (Register) Size
|
|---|
| 1670 |
|
|---|
| 1671 | ; Pad the data packet.
|
|---|
| 1672 | mov [abData + 0], dword 0
|
|---|
| 1673 | mov [abData + 4], dword 0
|
|---|
| 1674 |
|
|---|
| 1675 | CallIOCtl 5, 5
|
|---|
| 1676 |
|
|---|
| 1677 | mov eax, [abData + 1] ; 1 - dd - Data
|
|---|
| 1678 |
|
|---|
| 1679 | ret
|
|---|
| 1680 |
|
|---|
| 1681 | ENDPROC vgdrvFindAdapter
|
|---|
| 1682 |
|
|---|
| 1683 |
|
|---|
| 1684 |
|
|---|
| 1685 | ;;
|
|---|
| 1686 | ; This must be present
|
|---|
| 1687 | segment DATA32
|
|---|
| 1688 | g_pfnDos16Write:
|
|---|
| 1689 | dd DOS16WRITE ; flat
|
|---|
| 1690 |
|
|---|
| 1691 |
|
|---|
