| 1 | ; $Id: bs3-cmn-TestDoModesByOneHlp.asm 60750 2016-04-28 20:11:10Z vboxsync $
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| 2 | ;; @file
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| 3 | ; BS3Kit - Bs3TestDoModesByOne Helpers for switching to the bit-count of the worker function.
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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 | ; The contents of this file may alternatively be used under the terms
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| 18 | ; of the Common Development and Distribution License Version 1.0
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| 19 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | ; VirtualBox OSE distribution, in which case the provisions of the
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| 21 | ; CDDL are applicable instead of those of the GPL.
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| 22 | ;
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| 23 | ; You may elect to license modified versions of this file under the
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| 24 | ; terms and conditions of either the GPL or the CDDL or both.
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| 25 | ;
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| 26 |
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| 27 |
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| 28 | ;*********************************************************************************************************************************
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| 29 | ;* Header Files *
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| 30 | ;*********************************************************************************************************************************
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| 31 | %include "bs3kit-template-header.mac"
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| 32 |
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| 33 |
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| 34 | ;*********************************************************************************************************************************
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| 35 | ;* Global Variables *
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| 36 | ;*********************************************************************************************************************************
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| 37 | BS3_BEGIN_DATA16
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| 38 | BS3_GLOBAL_NAME_EX BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent),,0
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| 39 | RTCCPTR_DEF 0
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| 40 |
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| 41 |
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| 42 | ;*********************************************************************************************************************************
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| 43 | ;* Exported Symbols *
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| 44 | ;*********************************************************************************************************************************
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| 45 | %ifdef BS3_STRICT
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| 46 | BS3_EXTERN_DATA16 g_bBs3CurrentMode
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| 47 | %endif
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| 48 |
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| 49 | %if TMPL_BITS == 16
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| 50 | BS3_BEGIN_TEXT16
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| 51 | extern _Bs3SelRealModeCodeToProtMode_c16
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| 52 | %endif
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| 53 |
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| 54 |
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| 55 | ;;
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| 56 | ; @cproto FNBS3TESTDOMODE
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| 57 | ;
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| 58 | ; @param bMode The current mode
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| 59 | ; @uses What allowed by calling convention and possibly mode, caller deals with it.
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| 60 | ;
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| 61 |
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| 62 | %if TMPL_BITS == 16
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| 63 | ;
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| 64 | ; For 16-bit workers.
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| 65 | ;
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| 66 | BS3_BEGIN_TEXT16
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| 67 |
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| 68 | BS3_SET_BITS 32
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| 69 | BS3_PROC_BEGIN _Bs3TestCallDoerTo16_c32
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| 70 | push xBP
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| 71 | mov xBP, xSP
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| 72 |
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| 73 | ; Load bMode into eax.
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| 74 | movzx eax, byte [xBP + xCB*2]
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| 75 | %ifdef BS3_STRICT
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| 76 | cmp al, [BS3_DATA16_WRT(g_bBs3CurrentMode)]
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| 77 | je .ok_mode
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| 78 | int3
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| 79 | .ok_mode:
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| 80 | %endif
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| 81 | ; Switch to 16-bit.
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| 82 | extern _Bs3SwitchTo16Bit_c32
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| 83 | call _Bs3SwitchTo16Bit_c32
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| 84 | BS3_SET_BITS 16
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| 85 |
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| 86 | push ax ; Worker bMode argument.
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| 87 |
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| 88 | ; Assuming real mode far pointer, convert protected mode before calling it.
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| 89 | push word [BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent) + 2]
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| 90 | call _Bs3SelRealModeCodeToProtMode_c16
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| 91 | add sp, 2
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| 92 |
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| 93 | push cs ; return selector
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| 94 | push word .return ; return address
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| 95 |
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| 96 | push ax ; call converted selector
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| 97 | push word [BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent)] ; call offset
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| 98 | retf
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| 99 |
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| 100 | .return:
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| 101 | ; Switch back to 32-bit mode.
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| 102 | extern _Bs3SwitchTo32Bit_c16
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| 103 | call _Bs3SwitchTo32Bit_c16
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| 104 | BS3_SET_BITS 32
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| 105 |
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| 106 | leave
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| 107 | ret
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| 108 | BS3_PROC_END _Bs3TestCallDoerTo16_c32
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| 109 |
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| 110 |
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| 111 | BS3_SET_BITS 64
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| 112 | BS3_PROC_BEGIN _Bs3TestCallDoerTo16_c64
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| 113 | push xBP
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| 114 | mov xBP, xSP
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| 115 |
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| 116 | ; Load bMode into eax.
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| 117 | movzx eax, cl
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| 118 | %ifdef BS3_STRICT
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| 119 | cmp al, [BS3_DATA16_WRT(g_bBs3CurrentMode)]
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| 120 | je .ok_mode
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| 121 | int3
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| 122 | .ok_mode:
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| 123 | %endif
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| 124 | ; Switch to 16-bit.
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| 125 | extern _Bs3SwitchTo16Bit_c64
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| 126 | call _Bs3SwitchTo16Bit_c64
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| 127 | BS3_SET_BITS 16
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| 128 |
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| 129 | push ax ; Worker bMode argument.
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| 130 |
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| 131 | ; Assuming real mode far pointer, convert protected mode before calling it.
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| 132 | push word [BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent) + 2]
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| 133 | call _Bs3SelRealModeCodeToProtMode_c16
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| 134 | add sp, 2
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| 135 |
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| 136 | push cs ; return selector
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| 137 | push word .return ; return address
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| 138 | push ax ; call converted selector
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| 139 | push word [BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent)] ; call offset
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| 140 | retf
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| 141 |
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| 142 | .return:
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| 143 | ; Switch back to 64-bit mode.
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| 144 | extern _Bs3SwitchTo64Bit_c16
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| 145 | call _Bs3SwitchTo64Bit_c16
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| 146 | BS3_SET_BITS 64
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| 147 |
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| 148 | leave
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| 149 | ret
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| 150 | BS3_PROC_END _Bs3TestCallDoerTo16_c64
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| 151 |
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| 152 |
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| 153 | %elif TMPL_BITS == 32
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| 154 | ;
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| 155 | ; For 32-bit workers.
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| 156 | ;
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| 157 |
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| 158 | BS3_BEGIN_TEXT16
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| 159 | BS3_SET_BITS 32
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| 160 | BS3_PROC_BEGIN _Bs3TestCallDoerTo32_f16
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| 161 | push xBP
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| 162 | mov xBP, xSP
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| 163 |
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| 164 | ; Load bMode into eax.
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| 165 | movzx eax, byte [xBP + xCB + sCB]
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| 166 | %ifdef BS3_STRICT
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| 167 | cmp al, [BS3_DATA16_WRT(g_bBs3CurrentMode)]
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| 168 | je .ok_mode
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| 169 | int3
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| 170 | .ok_mode:
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| 171 | %endif
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| 172 | ; Switch to 32-bit.
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| 173 | extern _Bs3SwitchTo32Bit_c16
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| 174 | call _Bs3SwitchTo32Bit_c16
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| 175 | BS3_SET_BITS 32
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| 176 |
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| 177 | push eax ; Worker bMode argument.
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| 178 |
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| 179 | test al, BS3_MODE_CODE_V86
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| 180 | jnz .return_to_v86 ; Need to figure this while we still have the mode value.
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| 181 |
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| 182 | call [BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent)]
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| 183 |
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| 184 | ; Switch back to 16-bit mode.
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| 185 | extern _Bs3SwitchTo16Bit_c32
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| 186 | call _Bs3SwitchTo16Bit_c32
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| 187 | BS3_SET_BITS 16
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| 188 | .return:
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| 189 | leave
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| 190 | retf
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| 191 |
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| 192 | BS3_SET_BITS 32
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| 193 | .return_to_v86:
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| 194 | call [BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent)]
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| 195 |
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| 196 | ; Switch back to v8086 mode.
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| 197 | extern _Bs3SwitchTo16BitV86_c32
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| 198 | call _Bs3SwitchTo16BitV86_c32
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| 199 | BS3_SET_BITS 16
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| 200 | jmp .return
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| 201 | BS3_PROC_END _Bs3TestCallDoerTo32_f16
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| 202 |
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| 203 |
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| 204 | BS3_BEGIN_TEXT32
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| 205 | BS3_SET_BITS 64
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| 206 | BS3_PROC_BEGIN _Bs3TestCallDoerTo32_c64
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| 207 | push xBP
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| 208 | mov xBP, xSP
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| 209 |
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| 210 | ; Load bMode into eax.
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| 211 | movzx eax, cl
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| 212 | %ifdef BS3_STRICT
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| 213 | cmp al, [BS3_DATA16_WRT(g_bBs3CurrentMode)]
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| 214 | je .ok_mode
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| 215 | int3
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| 216 | .ok_mode:
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| 217 | %endif
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| 218 | ; Switch to 32-bit.
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| 219 | extern _Bs3SwitchTo32Bit_c64
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| 220 | call _Bs3SwitchTo32Bit_c64
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| 221 | BS3_SET_BITS 32
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| 222 |
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| 223 | push eax ; Worker bMode argument.
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| 224 | call [BS3_CMN_NM(g_pfnBs3TestDoModesByOneCurrent)]
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| 225 |
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| 226 | ; Switch back to 64-bit mode.
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| 227 | extern _Bs3SwitchTo64Bit_c32
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| 228 | call _Bs3SwitchTo64Bit_c32
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| 229 | BS3_SET_BITS 64
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| 230 |
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| 231 | leave
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| 232 | ret
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| 233 | BS3_PROC_END _Bs3TestCallDoerTo32_c64
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| 234 |
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| 235 |
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| 236 | %elif TMPL_BITS == 64
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| 237 | ;
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| 238 | ; 64-bit workers makes no sense, so skip that.
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| 239 | ;
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| 240 | %else
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| 241 | %error "TMPL_BITS!"
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| 242 | %endif
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| 243 |
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