1 | ; $Id: bootsector2-cpu-hidden-regs-1.asm 82968 2020-02-04 10:35:17Z vboxsync $
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2 | ;; @file
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3 | ; Bootsector that shows/tests the content of hidden CPU registers.
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4 | ;
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5 | ; Requires VMMDevTesting. Enable it via VBoxManage:
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6 | ; VBoxManage setextradata bs-cpu-hidden-regs-1 VBoxInternal/Devices/VMMDev/0/Config/TestingEnabled 1
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7 |
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8 | ;
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9 | ; Copyright (C) 2007-2020 Oracle Corporation
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10 | ;
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11 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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12 | ; available from http://www.virtualbox.org. This file is free software;
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13 | ; you can redistribute it and/or modify it under the terms of the GNU
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14 | ; General Public License (GPL) as published by the Free Software
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15 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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16 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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17 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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18 | ;
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19 | ; The contents of this file may alternatively be used under the terms
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20 | ; of the Common Development and Distribution License Version 1.0
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21 | ; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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22 | ; VirtualBox OSE distribution, in which case the provisions of the
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23 | ; CDDL are applicable instead of those of the GPL.
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24 | ;
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25 | ; You may elect to license modified versions of this file under the
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26 | ; terms and conditions of either the GPL or the CDDL or both.
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27 | ;
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28 |
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29 |
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30 | %include "iprt/asmdefs.mac"
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31 | %include "iprt/x86.mac"
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32 | %include "VBox/VMMDevTesting.mac"
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33 |
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34 | ;
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35 | ; Include and execute the init code.
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36 | ;
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37 | %define BS2_INIT_RM
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38 | %define BS2_INC_PE16
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39 | %define BS2_INC_PE32
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40 | %define BS2_INC_PP32
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41 | %define BS2_INC_LM64
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42 | %define BS2_WITH_TRAPS
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43 | %define BS2_WITH_MANUAL_LTR
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44 | %include "bootsector2-common-init-code.mac"
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45 |
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46 |
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47 | ;
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48 | ; The benchmark driver
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49 | ;
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50 | BEGINPROC main
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51 | ;
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52 | ; Test prologue.
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53 | ;
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54 | mov ax, .s_szTstName
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55 | call TestInit_r86
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56 | call Bs2EnableA20_r86
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57 | call Bs2PanicIfVMMDevTestingIsMissing_r86
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58 |
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59 | call reportPostBiosValues
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60 | call rmTests
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61 | call doTests_rm_pe32
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62 | call doTests_rm_pp32
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63 | call doTests_rm_lm64
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64 |
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65 | ;
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66 | ; We're done.
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67 | ;
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68 | call TestTerm_r86
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69 | call Bs2Panic
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70 |
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71 | .s_szTstName:
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72 | db 'tstCpuHidRegs', 0
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73 | ENDPROC main
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74 |
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75 |
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76 | ;
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77 | ; Reports the values of interesting hidden registers as we start the test, i.e.
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78 | ; right after the BIOS completed.
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79 | ;
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80 | BEGINPROC reportPostBiosValues
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81 | push ax
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82 | push bx
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83 | mov ax, .s_szTstInitial
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84 | call TestSub_r86
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85 |
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86 | mov ax, .s_szzStart
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87 | call TestValueRegSZZ_rm
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88 |
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89 | .done
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90 | pop bx
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91 | pop ax
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92 | ret
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93 |
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94 | .s_szzStart:
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95 | db 'BIOS - ldtr:ldtr', 0;
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96 | db 'BIOS - ldtr_base:ldtr_base', 0;
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97 | db 'BIOS - ldtr_limit:ldtr_lim', 0;
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98 | db 'BIOS - ldtr_attr:ldtr_attr', 0;
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99 | db 'BIOS - tr:tr', 0;
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100 | db 'BIOS - tr_base:tr_base', 0;
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101 | db 'BIOS - tr_limit:tr_lim', 0;
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102 | db 'BIOS - tr_attr:tr_attr', 0;
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103 | db 'BIOS - cs:cs', 0;
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104 | db 'BIOS - cs_base:cs_base', 0;
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105 | db 'BIOS - cs_limit:cs_lim', 0;
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106 | db 'BIOS - cs_attr:cs_attr', 0;
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107 | db 'BIOS - ss:ss', 0;
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108 | db 'BIOS - ss_base:ss_base', 0;
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109 | db 'BIOS - ss_limit:ss_lim', 0;
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110 | db 'BIOS - ss_attr:ss_attr', 0;
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111 | db 'BIOS - ds:ds', 0;
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112 | db 'BIOS - ds_base:ds_base', 0;
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113 | db 'BIOS - ds_limit:ds_lim', 0;
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114 | db 'BIOS - ds_attr:ds_attr', 0;
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115 | db 0,0,0,0 ; terminator
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116 | .s_szTstInitial:
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117 | db 'Post BIOS Values', 0
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118 | ENDPROC reportPostBiosValues
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119 |
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120 |
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121 | ;
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122 | ; Reports the values of interesting hidden registers as we start the test, i.e.
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123 | ; right after the BIOS completed.
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124 | ;
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125 | BEGINPROC rmTests
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126 | push eax
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127 | push ebx
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128 | pushfd
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129 | cli
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130 |
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131 | mov ax, .s_szTstRM
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132 | call TestSub_r86
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133 |
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134 | ; Check if CS changes when leaving protected mode.
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135 | mov ax, .s_szzRMPre
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136 | call TestValueRegSZZ_rm
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137 | mov byte [cs:.s_dwDummy], 1
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138 | call Bs2EnterMode_rm_pe32
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139 | BITS 32
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140 | mov eax, .s_szzProt32
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141 | call TestValueRegSZZ_pe32
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142 | ; mov word [cs:.s_dwDummy], 2 - this shall GP(CS).
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143 | call Bs2ExitMode_pe32
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144 | BITS 16
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145 | mov ax, .s_szzRMPost
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146 | call TestValueRegSZZ_rm
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147 | mov dword [cs:.s_dwDummy], 3
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148 |
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149 | ;
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150 | ; What happens if we make CS32 execute-only and return to real-mode.
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151 | ;
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152 | mov byte [cs:.s_dwDummy], 1
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153 | call Bs2EnterMode_rm_pe16
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154 | jmp BS2_SEL_CS16_EO:.loaded_cs16_eo
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155 | .loaded_cs16_eo:
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156 | mov eax, .s_szzProtEO
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157 | call TestValueRegSZZ_pe16
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158 | ; mov ax, word [cs:.s_dwDummy] - this shall GP(CS).
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159 | ; mov word [cs:.s_dwDummy], 2 - this shall GP(CS).
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160 |
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161 | ; Leave real-mode ourselves.
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162 | mov eax, cr0
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163 | and eax, ~X86_CR0_PE
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164 | mov cr0, eax
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165 |
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166 | ; All but cs gets reloaded.
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167 | xor ax, ax
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168 | mov ss, ax
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169 | mov ds, ax
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170 | mov es, ax
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171 | mov fs, ax
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172 | mov gs, ax
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173 |
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174 | ; Display CS and do a test.
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175 | mov ax, .s_szzRMEO
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176 | call TestValueRegSZZ_rm
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177 |
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178 | mov ax, [cs:.s_dwDummy] ; works on intel
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179 | mov dword [cs:.s_dwDummy], 3 ; ditto
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180 |
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181 | jmp far 0000:.load_rm_cs
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182 | .load_rm_cs:
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183 | ; Display CS to check that it remained unchanged.
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184 | mov ax, .s_szzRMEO2
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185 | call TestValueRegSZZ_rm
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186 |
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187 | ; Cleanup everything properly.
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188 | call Bs2EnterMode_rm_pe32
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189 | BITS 32
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190 | call Bs2ExitMode_pe32
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191 | BITS 16
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192 |
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193 | popfd
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194 | pop ebx
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195 | pop eax
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196 | ret
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197 |
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198 | .s_dwDummy:
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199 | dd 0
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200 | .s_szzRMPre:
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201 | db 'RM Pre - cs:cs', 0;
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202 | db 'RM Pre - cs_base:cs_base', 0;
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203 | db 'RM Pre - cs_limit:cs_lim', 0;
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204 | db 'RM Pre - cs_attr:cs_attr', 0;
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205 | db 0,0,0,0 ; terminator
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206 | .s_szzProt32:
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207 | db 'Prot32 - cs:cs', 0;
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208 | db 'Prot32 - cs_base:cs_base', 0;
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209 | db 'Prot32 - cs_limit:cs_lim', 0;
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210 | db 'Prot32 - cs_attr:cs_attr', 0;
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211 | db 0,0,0,0 ; terminator
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212 | .s_szzRMPost:
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213 | db 'RM Post - cs:cs', 0;
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214 | db 'RM Post - cs_base:cs_base', 0;
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215 | db 'RM Post - cs_limit:cs_lim', 0;
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216 | db 'RM Post - cs_attr:cs_attr', 0;
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217 | db 0,0,0,0 ; terminator
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218 | .s_szzProtEO:
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219 | db 'Prot 16 EO,L-1,NA - cs:cs', 0;
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220 | db 'Prot 16 EO,L-1,NA - cs_base:cs_base', 0;
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221 | db 'Prot 16 EO,L-1,NA - cs_limit:cs_lim', 0;
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222 | db 'Prot 16 EO,L-1,NA - cs_attr:cs_attr', 0;
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223 | db 0,0,0,0 ; terminator
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224 | .s_szzRMEO:
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225 | db 'RM Post EO,L-1,NA - cs:cs', 0;
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226 | db 'RM Post EO,L-1,NA - cs_base:cs_base', 0;
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227 | db 'RM Post EO,L-1,NA - cs_limit:cs_lim', 0;
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228 | db 'RM Post EO,L-1,NA - cs_attr:cs_attr', 0;
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229 | db 0,0,0,0 ; terminator
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230 | .s_szzRMEO2:
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231 | db 'RM CS(0) EO,L-1 - cs:cs', 0;
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232 | db 'RM CS(0) EO,L-1 - cs_base:cs_base', 0;
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233 | db 'RM CS(0) EO,L-1 - cs_limit:cs_lim', 0;
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234 | db 'RM CS(0) EO,L-1 - cs_attr:cs_attr', 0;
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235 | db 0,0,0,0 ; terminator
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236 | .s_szTstRM:
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237 | db 'Real Mode Test', 0
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238 | ENDPROC rmTests
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239 |
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240 |
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241 |
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242 | ;
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243 | ; Instantiate the template code.
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244 | ;
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245 | %include "bootsector2-template-footer.mac" ; reset the initial environemnt.
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246 |
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247 | %define TMPL_RM
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248 | %include "bootsector2-cpu-hidden-regs-1-template.mac"
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249 | ;%define TMPL_CMN_V86
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250 | ;%include "bootsector2-cpu-hidden-regs-1-template.mac"
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251 | %define TMPL_PE16
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252 | %include "bootsector2-cpu-hidden-regs-1-template.mac"
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253 | %define TMPL_PE32
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254 | %include "bootsector2-cpu-hidden-regs-1-template.mac"
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255 | ;%define TMPL_PP16
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256 | ;%include "bootsector2-cpu-hidden-regs-1-template.mac"
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257 | %define TMPL_PP32
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258 | %include "bootsector2-cpu-hidden-regs-1-template.mac"
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259 | ;%define TMPL_PAE16
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260 | ;%include "bootsector2-cpu-hidden-regs-1-template.mac"
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261 | ;%define TMPL_PAE32
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262 | ;%include "bootsector2-cpu-hidden-regs-1-template.mac"
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263 | ;%define TMPL_LM16
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264 | ;%include "bootsector2-cpu-hidden-regs-1-template.mac"
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265 | ;%define TMPL_LM32
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266 | ;%include "bootsector2-cpu-hidden-regs-1-template.mac"
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267 | %define TMPL_LM64
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268 | %include "bootsector2-cpu-hidden-regs-1-template.mac"
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269 |
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270 |
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271 | ;
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272 | ; End sections and image.
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273 | ;
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274 | %include "bootsector2-common-end.mac"
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275 |
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