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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2455 | mario79 | 3 | ;; Copyright (C) KolibriOS team 2007-2012. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 5130 $ |
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9 | |||
10 | ; Virtual-8086 mode manager |
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11 | ; diamond, 2007, 2008 |
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12 | |||
13 | DEBUG_SHOW_IO = 0 |
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14 | |||
2384 | hidnplayr | 15 | struct V86_machine |
2288 | clevermous | 16 | ; page directory |
5130 | serge | 17 | process dd ? |
2288 | clevermous | 18 | ; mutex to protect all data from writing by multiple threads at one time |
2384 | hidnplayr | 19 | mutex dd ? |
2288 | clevermous | 20 | ; i/o permission map |
2384 | hidnplayr | 21 | iopm dd ? |
22 | ends |
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2288 | clevermous | 23 | |
24 | ; Create V86 machine |
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25 | ; in: nothing |
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26 | ; out: eax = handle (pointer to struc V86_machine) |
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27 | ; eax = NULL => failure |
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28 | ; destroys: ebx, ecx, edx (due to malloc) |
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29 | v86_create: |
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30 | ; allocate V86_machine structure |
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2384 | hidnplayr | 31 | mov eax, sizeof.V86_machine |
2288 | clevermous | 32 | call malloc |
33 | test eax, eax |
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34 | jz .fail |
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35 | ; initialize mutex |
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36 | and dword [eax+V86_machine.mutex], 0 |
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37 | ; allocate tables |
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38 | mov ebx, eax |
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5130 | serge | 39 | |
40 | stdcall create_process, 4096, OS_BASE, 4096 |
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41 | test eax, eax |
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42 | jz .fail2 |
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43 | |||
44 | mov [eax+PROC.mem_used], 4096 |
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45 | mov [ebx+V86_machine.process], eax |
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46 | |||
47 | push 2000h |
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2288 | clevermous | 48 | call kernel_alloc |
49 | test eax, eax |
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50 | jz .fail2 |
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5130 | serge | 51 | |
52 | mov [ebx+V86_machine.iopm], eax |
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53 | |||
54 | |||
55 | ; initialize tables |
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56 | push edi |
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2288 | clevermous | 57 | mov edi, eax |
5130 | serge | 58 | mov eax, -1 |
2288 | clevermous | 59 | mov ecx, 2000h/4 |
60 | rep stosd |
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61 | |||
5130 | serge | 62 | mov eax, [ebx+V86_machine.process] |
63 | mov eax, [eax+PROC.pdt_0_phys] |
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2288 | clevermous | 64 | |
5130 | serge | 65 | pushfd |
66 | cli |
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67 | mov cr3, eax |
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68 | |||
69 | |||
2288 | clevermous | 70 | ; now V86 specific: initialize known addresses in first Mb |
5130 | serge | 71 | |
2288 | clevermous | 72 | ; first page - BIOS data (shared between all machines!) |
73 | ; physical address = 0 |
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74 | ; linear address = OS_BASE |
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75 | ; page before 0xA0000 - Extended BIOS Data Area (shared between all machines!) |
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76 | ; physical address = 0x9C000 |
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77 | ; linear address = 0x8009C000 |
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78 | ; (I have seen one computer with EBDA segment = 0x9D80, |
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79 | ; all other computers use less memory) |
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5130 | serge | 80 | |
81 | mov eax, PG_UW |
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82 | mov [page_tabs], eax |
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83 | invlpg [eax] |
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84 | |||
85 | mov byte [0x500], 0xCD |
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86 | mov byte [0x501], 0x13 |
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87 | mov byte [0x502], 0xF4 |
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88 | mov byte [0x503], 0xCD |
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89 | mov byte [0x504], 0x10 |
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90 | mov byte [0x505], 0xF4 |
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91 | |||
92 | mov eax, 0x99000+PG_UW |
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93 | mov edi, page_tabs+0x99*4 |
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94 | mov edx, 0x1000 |
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95 | mov ecx, 7 |
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2288 | clevermous | 96 | @@: |
97 | stosd |
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5130 | serge | 98 | add eax, edx |
2288 | clevermous | 99 | loop @b |
5130 | serge | 100 | |
2288 | clevermous | 101 | ; addresses 0xC0000 - 0xFFFFF - BIOS code (shared between all machines!) |
102 | ; physical address = 0xC0000 |
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5130 | serge | 103 | |
104 | mov eax, 0xC0000+PG_UW |
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105 | mov edi, page_tabs+0xC0*4 |
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106 | mov ecx, 64 |
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2288 | clevermous | 107 | @@: |
5130 | serge | 108 | stosd |
109 | add eax, edx |
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110 | loop @b |
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111 | |||
112 | mov eax, sys_proc |
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113 | push ebx |
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114 | call set_cr3 |
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115 | pop ebx |
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116 | popfd |
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117 | |||
118 | pop edi |
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119 | |||
2288 | clevermous | 120 | mov eax, ebx |
121 | ret |
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122 | .fail2: |
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123 | mov eax, ebx |
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124 | call free |
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125 | .fail: |
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126 | xor eax, eax |
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127 | ret |
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128 | |||
5130 | serge | 129 | ;not used |
2288 | clevermous | 130 | ; Destroy V86 machine |
131 | ; in: eax = handle |
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132 | ; out: nothing |
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133 | ; destroys: eax, ebx, ecx, edx (due to free) |
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5130 | serge | 134 | ;v86_destroy: |
135 | ; push eax |
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136 | ; stdcall kernel_free, [eax+V86_machine.pagedir] |
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137 | ; pop eax |
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138 | ; jmp free |
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2288 | clevermous | 139 | |
140 | ; Translate V86-address to linear address |
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141 | ; in: eax=V86 address |
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142 | ; esi=handle |
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143 | ; out: eax=linear address |
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144 | ; destroys: nothing |
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145 | v86_get_lin_addr: |
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146 | push ecx edx |
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147 | mov ecx, eax |
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148 | shr ecx, 12 |
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5130 | serge | 149 | mov edx, [page_tabs+ecx*4] |
2288 | clevermous | 150 | and eax, 0xFFF |
5130 | serge | 151 | and edx, 0xFFFFF000 |
152 | or eax, edx |
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2288 | clevermous | 153 | pop edx ecx |
154 | ret |
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155 | |||
5130 | serge | 156 | ;not used |
2288 | clevermous | 157 | ; Sets linear address for V86-page |
158 | ; in: eax=linear address (must be page-aligned) |
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159 | ; ecx=V86 page (NOT address!) |
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160 | ; esi=handle |
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161 | ; out: nothing |
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162 | ; destroys: nothing |
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5130 | serge | 163 | ;v86_set_page: |
164 | ; push eax ebx |
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165 | ; mov ebx, [esi+V86_machine.pagedir] |
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166 | ; mov [ebx+ecx*4+0x1800], eax |
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167 | ; call get_pg_addr |
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168 | ; or al, 111b |
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169 | ; mov [ebx+ecx*4+0x1000], eax |
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170 | ; pop ebx eax |
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171 | ; ret |
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2288 | clevermous | 172 | |
173 | ; Allocate memory in V86 machine |
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174 | ; in: eax=size (in bytes) |
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175 | ; esi=handle |
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176 | ; out: eax=V86 address, para-aligned (0x10 multiple) |
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177 | ; destroys: nothing |
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3539 | clevermous | 178 | ; недописана!!! |
2288 | clevermous | 179 | ;v86_alloc: |
180 | ; push ebx ecx edx edi |
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181 | ; lea ebx, [esi+V86_machine.mutex] |
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182 | ; call wait_mutex |
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183 | ; add eax, 0x1F |
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184 | ; shr eax, 4 |
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185 | ; mov ebx, 0x1000 ; start with address 0x1000 (second page) |
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186 | ; mov edi, [esi+V86_machine.tables] |
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187 | ;.l: |
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188 | ; mov ecx, ebx |
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189 | ; shr ecx, 12 |
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190 | ; mov edx, [edi+0x1000+ecx*4] ; get linear address |
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191 | ; test edx, edx ; page allocated? |
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192 | ; jz .unalloc |
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193 | ; mov ecx, ebx |
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194 | ; and ecx, 0xFFF |
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195 | ; add edx, ecx |
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196 | ; cmp dword [edx], 0 ; free block? |
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197 | ; jnz .n |
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198 | ; cmp dword [edx+4], |
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199 | ; and [esi+V86_machine.mutex], 0 |
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200 | ; pop edi edx ecx ebx |
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201 | ; ret |
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202 | |||
203 | uglobal |
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204 | sys_v86_machine dd ? |
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205 | endg |
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206 | |||
207 | ; Called from kernel.asm at first stages of loading |
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208 | ; Initialize system V86 machine (used to simulate BIOS int 13h) |
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209 | init_sys_v86: |
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210 | call v86_create |
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211 | mov [sys_v86_machine], eax |
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212 | test eax, eax |
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213 | jz .ret |
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214 | mov esi, eax |
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215 | if ~DEBUG_SHOW_IO |
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216 | ; allow access to all ports |
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217 | mov ecx, [esi+V86_machine.iopm] |
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218 | xor eax, eax |
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219 | mov edi, ecx |
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220 | mov ecx, 10000h/8/4 |
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221 | rep stosd |
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222 | end if |
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223 | .ret: |
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224 | ret |
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225 | |||
2384 | hidnplayr | 226 | struct v86_regs |
2288 | clevermous | 227 | ; don't change the order, it is important |
2384 | hidnplayr | 228 | edi dd ? |
229 | esi dd ? |
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230 | ebp dd ? |
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231 | dd ? ; ignored |
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232 | ebx dd ? |
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233 | edx dd ? |
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234 | ecx dd ? |
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235 | eax dd ? |
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236 | eip dd ? |
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237 | cs dd ? |
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238 | eflags dd ? ; VM flag must be set! |
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239 | esp dd ? |
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240 | ss dd ? |
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241 | es dd ? |
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242 | ds dd ? |
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243 | fs dd ? |
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244 | gs dd ? |
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245 | ends |
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2288 | clevermous | 246 | |
247 | ; Run V86 machine |
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248 | ; in: ebx -> registers for V86 (two structures: in and out) |
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249 | ; esi = handle |
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250 | ; ecx = expected end address (CS:IP) |
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251 | ; edx = IRQ to hook or -1 if not required |
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252 | ; out: structure pointed to by ebx is filled with new values |
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253 | ; eax = 1 - exception has occured, cl contains code |
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254 | ; eax = 2 - access to disabled i/o port, ecx contains port address |
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255 | ; eax = 3 - IRQ is already hooked by another VM |
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256 | ; destroys: nothing |
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257 | v86_start: |
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5130 | serge | 258 | |
2288 | clevermous | 259 | pushad |
260 | |||
261 | cli |
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262 | |||
5130 | serge | 263 | mov ecx, [current_slot] |
2288 | clevermous | 264 | |
5130 | serge | 265 | push dword [ecx+APPDATA.io_map] |
266 | push dword [ecx+APPDATA.io_map+4] |
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267 | push [ecx+APPDATA.process] |
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268 | push [ecx+APPDATA.saved_esp0] |
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269 | mov [ecx+APPDATA.saved_esp0], esp |
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270 | mov [tss._esp0], esp |
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271 | |||
2288 | clevermous | 272 | mov eax, [esi+V86_machine.iopm] |
273 | call get_pg_addr |
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274 | inc eax |
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275 | mov dword [ecx+APPDATA.io_map], eax |
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276 | mov dword [page_tabs + (tss._io_map_0 shr 10)], eax |
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5130 | serge | 277 | |
278 | mov eax, [esi+V86_machine.iopm] |
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2288 | clevermous | 279 | add eax, 0x1000 |
5130 | serge | 280 | call get_pg_addr |
281 | inc eax |
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2288 | clevermous | 282 | mov dword [ecx+APPDATA.io_map+4], eax |
283 | mov dword [page_tabs + (tss._io_map_1 shr 10)], eax |
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284 | |||
5130 | serge | 285 | mov eax, [esi+V86_machine.process] |
286 | mov [ecx+APPDATA.process], eax |
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287 | mov [current_process], eax |
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288 | mov eax, [eax+PROC.pdt_0_phys] |
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2288 | clevermous | 289 | mov cr3, eax |
290 | |||
291 | ; We do not enable interrupts, because V86 IRQ redirector assumes that |
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292 | ; machine is running |
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293 | ; They will be enabled by IRET. |
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294 | ; sti |
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295 | |||
296 | mov eax, esi |
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2384 | hidnplayr | 297 | sub esp, sizeof.v86_regs |
2288 | clevermous | 298 | mov esi, ebx |
299 | mov edi, esp |
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2384 | hidnplayr | 300 | mov ecx, sizeof.v86_regs/4 |
2288 | clevermous | 301 | rep movsd |
302 | |||
303 | cmp edx, -1 |
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304 | jz .noirqhook |
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305 | uglobal |
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306 | v86_irqhooks rd IRQ_RESERVED * 2 |
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307 | endg |
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308 | cmp [v86_irqhooks+edx*8], 0 |
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309 | jz @f |
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310 | cmp [v86_irqhooks+edx*8], eax |
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311 | jz @f |
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312 | mov esi, v86_irqerr |
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313 | call sys_msg_board_str |
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314 | inc [v86_irqhooks+edx*8+4] |
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315 | mov eax, 3 |
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316 | jmp v86_exc_c.exit |
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317 | @@: |
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318 | mov [v86_irqhooks+edx*8], eax |
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319 | inc [v86_irqhooks+edx*8+4] |
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320 | .noirqhook: |
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321 | |||
322 | popad |
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323 | iretd |
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324 | |||
325 | ; It is only possible to leave virtual-8086 mode by faulting to |
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326 | ; a protected-mode interrupt handler (typically the general-protection |
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327 | ; exception handler, which in turn calls the virtual 8086-mode monitor). |
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328 | |||
329 | iglobal |
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330 | v86_exc_str1 db 'V86 : unexpected exception ',0 |
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331 | v86_exc_str2 db ' at ',0 |
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332 | v86_exc_str3 db ':',0 |
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333 | v86_exc_str4 db 13,10,'V86 : faulted code:',0 |
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334 | v86_exc_str5 db ' (unavailable)',0 |
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335 | v86_newline db 13,10,0 |
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336 | v86_io_str1 db 'V86 : access to disabled i/o port ',0 |
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337 | v86_io_byte db ' (byte)',13,10,0 |
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338 | v86_io_word db ' (word)',13,10,0 |
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339 | v86_io_dword db ' (dword)',13,10,0 |
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340 | v86_irqerr db 'V86 : IRQ already hooked',13,10,0 |
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341 | endg |
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342 | |||
343 | v86_exc_c: |
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344 | ; Did we all that we have wanted to do? |
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345 | cmp bl, 1 |
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346 | jne @f |
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347 | xor eax, eax |
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348 | mov dr6, eax |
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349 | @@: |
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2384 | hidnplayr | 350 | mov eax, [esp+sizeof.v86_regs+10h+18h] |
2288 | clevermous | 351 | cmp word [esp+v86_regs.eip], ax |
352 | jnz @f |
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353 | shr eax, 16 |
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354 | cmp word [esp+v86_regs.cs], ax |
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355 | jz .done |
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356 | @@: |
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357 | ; Various system events, which must be handled, result in #GP |
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358 | cmp bl, 13 |
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359 | jnz .nogp |
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360 | ; If faulted EIP exceeds 0xFFFF, we have #GP and it is an error |
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361 | cmp word [esp+v86_regs.eip+2], 0 |
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362 | jnz .nogp |
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363 | ; Otherwise we can safely access byte at CS:IP |
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364 | ; (because it is #GP, not #PF handler) |
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3539 | clevermous | 365 | ; Если бы мы могли схлопотать исключение только из-за чтения байтов кода, |
366 | ; мы бы его уже схлопотали и это было бы не #GP |
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2288 | clevermous | 367 | movzx esi, word [esp+v86_regs.cs] |
368 | shl esi, 4 |
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369 | add esi, [esp+v86_regs.eip] |
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370 | lodsb |
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371 | cmp al, 0xCD ; int xx command = CD xx |
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372 | jz .handle_int |
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373 | cmp al, 0xCF |
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374 | jz .handle_iret |
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375 | cmp al, 0xF3 |
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376 | jz .handle_rep |
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377 | cmp al, 0xEC |
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378 | jz .handle_in |
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379 | cmp al, 0xED |
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380 | jz .handle_in_word |
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381 | cmp al, 0xEE |
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382 | jz .handle_out |
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383 | cmp al, 0xEF |
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384 | jz .handle_out_word |
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385 | cmp al, 0xE4 |
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386 | jz .handle_in_imm |
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387 | cmp al, 0xE6 |
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388 | jz .handle_out_imm |
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389 | cmp al, 0x9C |
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390 | jz .handle_pushf |
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391 | cmp al, 0x9D |
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392 | jz .handle_popf |
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393 | cmp al, 0xFA |
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394 | jz .handle_cli |
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395 | cmp al, 0xFB |
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396 | jz .handle_sti |
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397 | cmp al, 0x66 |
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398 | jz .handle_66 |
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399 | jmp .nogp |
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400 | .handle_int: |
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401 | cmp word [esp+v86_regs.eip], 0xFFFF |
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402 | jae .nogp |
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403 | xor eax, eax |
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404 | lodsb |
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405 | ; call sys_msg_board_byte |
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406 | ; simulate INT command |
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407 | ; N.B. It is possible that some checks need to be corrected, |
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408 | ; but at least in case of normal execution the code works. |
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409 | .simulate_int: |
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410 | cmp word [esp+v86_regs.esp], 6 |
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411 | jae @f |
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412 | mov bl, 12 ; #SS exception |
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413 | jmp .nogp |
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414 | @@: |
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415 | movzx edx, word [esp+v86_regs.ss] |
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416 | shl edx, 4 |
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417 | push eax |
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418 | movzx eax, word [esp+4+v86_regs.esp] |
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419 | sub eax, 6 |
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420 | add edx, eax |
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421 | mov eax, edx |
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2384 | hidnplayr | 422 | mov esi, [esp+4+sizeof.v86_regs+10h+4] |
2288 | clevermous | 423 | call v86_get_lin_addr |
424 | cmp eax, 0x1000 |
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425 | jae @f |
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426 | mov bl, 14 ; #PF exception |
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427 | jmp .nogp |
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428 | @@: |
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429 | lea eax, [edx+5] |
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430 | call v86_get_lin_addr |
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431 | cmp eax, 0x1000 |
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432 | jae @f |
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433 | mov bl, 14 ; #PF exception |
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434 | jmp .nogp |
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435 | @@: |
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436 | sub word [esp+4+v86_regs.esp], 6 |
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437 | mov eax, [esp+4+v86_regs.eip] |
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438 | cmp byte [esp+1], 0 |
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439 | jnz @f |
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440 | inc eax |
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441 | inc eax |
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442 | @@: |
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443 | mov word [edx], ax |
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444 | mov eax, [esp+4+v86_regs.cs] |
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445 | mov word [edx+2], ax |
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446 | mov eax, [esp+4+v86_regs.eflags] |
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447 | mov word [edx+4], ax |
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448 | pop eax |
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449 | mov ah, 0 |
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450 | mov cx, [eax*4] |
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451 | mov word [esp+v86_regs.eip], cx |
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452 | mov cx, [eax*4+2] |
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453 | mov word [esp+v86_regs.cs], cx |
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454 | ; note that interrupts will be disabled globally at IRET |
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455 | and byte [esp+v86_regs.eflags+1], not 3 ; clear IF and TF flags |
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456 | ; continue V86 execution |
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457 | popad |
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458 | iretd |
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459 | .handle_iret: |
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460 | cmp word [esp+v86_regs.esp], 0x10000 - 6 |
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461 | jbe @f |
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462 | mov bl, 12 |
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463 | jmp .nogp |
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464 | @@: |
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465 | movzx edx, word [esp+v86_regs.ss] |
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466 | shl edx, 4 |
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467 | movzx eax, word [esp+v86_regs.esp] |
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468 | add edx, eax |
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469 | mov eax, edx |
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2384 | hidnplayr | 470 | mov esi, [esp+sizeof.v86_regs+10h+4] |
2288 | clevermous | 471 | call v86_get_lin_addr |
472 | cmp eax, 0x1000 |
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473 | jae @f |
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474 | mov bl, 14 |
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475 | jmp .nogp |
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476 | @@: |
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477 | lea eax, [edx+5] |
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478 | call v86_get_lin_addr |
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479 | cmp eax, 0x1000 |
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480 | jae @f |
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481 | mov bl, 14 |
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482 | jmp .nogp |
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483 | @@: |
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484 | mov ax, [edx] |
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485 | mov word [esp+v86_regs.eip], ax |
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486 | mov ax, [edx+2] |
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487 | mov word [esp+v86_regs.cs], ax |
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488 | mov ax, [edx+4] |
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489 | mov word [esp+v86_regs.eflags], ax |
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490 | add word [esp+v86_regs.esp], 6 |
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491 | popad |
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492 | iretd |
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493 | .handle_pushf: |
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494 | cmp word [esp+v86_regs.esp], 1 |
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495 | jnz @f |
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496 | mov bl, 12 |
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497 | jmp .nogp |
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498 | @@: |
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499 | movzx edx, word [esp+v86_regs.ss] |
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500 | shl edx, 4 |
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501 | mov eax, [esp+v86_regs.esp] |
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502 | sub eax, 2 |
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503 | movzx eax, ax |
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504 | add edx, eax |
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505 | mov eax, edx |
||
2384 | hidnplayr | 506 | mov esi, [esp+sizeof.v86_regs+10h+4] |
2288 | clevermous | 507 | call v86_get_lin_addr |
508 | cmp eax, 0x1000 |
||
509 | jae @f |
||
510 | mov bl, 14 ; #PF exception |
||
511 | jmp .nogp |
||
512 | @@: |
||
513 | lea eax, [edx+1] |
||
514 | call v86_get_lin_addr |
||
515 | cmp eax, 0x1000 |
||
516 | jae @f |
||
517 | mov bl, 14 |
||
518 | jmp .nogp |
||
519 | @@: |
||
520 | sub word [esp+v86_regs.esp], 2 |
||
521 | mov eax, [esp+v86_regs.eflags] |
||
522 | mov [edx], ax |
||
523 | inc word [esp+v86_regs.eip] |
||
524 | popad |
||
525 | iretd |
||
526 | .handle_pushfd: |
||
527 | cmp word [esp+v86_regs.esp], 4 |
||
528 | jae @f |
||
529 | mov bl, 12 ; #SS exception |
||
530 | jmp .nogp |
||
531 | @@: |
||
532 | movzx edx, word [esp+v86_regs.ss] |
||
533 | shl edx, 4 |
||
534 | movzx eax, word [esp+v86_regs.esp] |
||
535 | sub eax, 4 |
||
536 | add edx, eax |
||
537 | mov eax, edx |
||
2384 | hidnplayr | 538 | mov esi, [esp+sizeof.v86_regs+10h+4] |
2288 | clevermous | 539 | call v86_get_lin_addr |
540 | cmp eax, 0x1000 |
||
541 | jae @f |
||
542 | mov bl, 14 ; #PF exception |
||
543 | jmp .nogp |
||
544 | @@: |
||
545 | lea eax, [edx+3] |
||
546 | call v86_get_lin_addr |
||
547 | cmp eax, 0x1000 |
||
548 | jae @f |
||
549 | mov bl, 14 ; #PF exception |
||
550 | jmp .nogp |
||
551 | @@: |
||
552 | sub word [esp+v86_regs.esp], 4 |
||
553 | movzx eax, word [esp+v86_regs.eflags] |
||
554 | mov [edx], eax |
||
555 | add word [esp+v86_regs.eip], 2 |
||
556 | popad |
||
557 | iretd |
||
558 | .handle_popf: |
||
559 | cmp word [esp+v86_regs.esp], 0xFFFF |
||
560 | jnz @f |
||
561 | mov bl, 12 |
||
562 | jmp .nogp |
||
563 | @@: |
||
564 | movzx edx, word [esp+v86_regs.ss] |
||
565 | shl edx, 4 |
||
566 | movzx eax, word [esp+v86_regs.esp] |
||
567 | add edx, eax |
||
568 | mov eax, edx |
||
2384 | hidnplayr | 569 | mov esi, [esp+sizeof.v86_regs+10h+4] |
2288 | clevermous | 570 | call v86_get_lin_addr |
571 | cmp eax, 0x1000 |
||
572 | jae @f |
||
573 | mov bl, 14 ; #PF exception |
||
574 | jmp .nogp |
||
575 | @@: |
||
576 | lea eax, [edx+1] |
||
577 | call v86_get_lin_addr |
||
578 | cmp eax, 0x1000 |
||
579 | jae @f |
||
580 | mov bl, 14 |
||
581 | jmp .nogp |
||
582 | @@: |
||
583 | mov ax, [edx] |
||
584 | mov word [esp+v86_regs.eflags], ax |
||
585 | add word [esp+v86_regs.esp], 2 |
||
586 | inc word [esp+v86_regs.eip] |
||
587 | popad |
||
588 | iretd |
||
589 | .handle_popfd: |
||
590 | cmp word [esp+v86_regs.esp], 0x10000 - 4 |
||
591 | jbe @f |
||
592 | mov bl, 12 |
||
593 | jmp .nogp |
||
594 | @@: |
||
595 | movzx edx, word [esp+v86_regs.ss] |
||
596 | shl edx, 4 |
||
597 | movzx eax, word [esp+v86_regs.esp] |
||
598 | add edx, eax |
||
599 | mov eax, edx |
||
2384 | hidnplayr | 600 | mov esi, [esp+sizeof.v86_regs+10h+4] |
2288 | clevermous | 601 | call v86_get_lin_addr |
602 | cmp eax, 0x1000 |
||
603 | jae @f |
||
604 | mov bl, 14 |
||
605 | jmp .nogp |
||
606 | @@: |
||
607 | lea eax, [edx+3] |
||
608 | call v86_get_lin_addr |
||
609 | cmp eax, 0x1000 |
||
610 | jae @f |
||
611 | mov bl, 14 |
||
612 | jmp .nogp |
||
613 | @@: |
||
614 | mov eax, [edx] |
||
615 | mov word [esp+v86_regs.eflags], ax |
||
616 | add word [esp+v86_regs.esp], 4 |
||
617 | add word [esp+v86_regs.eip], 2 |
||
618 | popad |
||
619 | iretd |
||
620 | .handle_cli: |
||
621 | and byte [esp+v86_regs.eflags+1], not 2 |
||
622 | inc word [esp+v86_regs.eip] |
||
623 | popad |
||
624 | iretd |
||
625 | .handle_sti: |
||
626 | or byte [esp+v86_regs.eflags+1], 2 |
||
627 | inc word [esp+v86_regs.eip] |
||
628 | popad |
||
629 | iretd |
||
630 | .handle_rep: |
||
631 | cmp word [esp+v86_regs.eip], 0xFFFF |
||
632 | jae .nogp |
||
633 | lodsb |
||
634 | cmp al, 6Eh |
||
635 | jz .handle_rep_outsb |
||
636 | jmp .nogp |
||
637 | .handle_rep_outsb: |
||
638 | .handle_in: |
||
639 | .handle_out: |
||
640 | .invalid_io_byte: |
||
641 | movzx ebx, word [esp+v86_regs.edx] |
||
642 | mov ecx, 1 |
||
643 | jmp .invalid_io |
||
644 | .handle_in_imm: |
||
645 | .handle_out_imm: |
||
646 | cmp word [esp+v86_regs.eip], 0xFFFF |
||
647 | jae .nogp |
||
648 | lodsb |
||
649 | movzx ebx, al |
||
650 | mov ecx, 1 |
||
651 | jmp .invalid_io |
||
652 | .handle_66: |
||
653 | cmp word [esp+v86_regs.eip], 0xFFFF |
||
654 | jae .nogp |
||
655 | lodsb |
||
656 | cmp al, 0x9C |
||
657 | jz .handle_pushfd |
||
658 | cmp al, 0x9D |
||
659 | jz .handle_popfd |
||
660 | cmp al, 0xEF |
||
661 | jz .handle_out_dword |
||
662 | cmp al, 0xED |
||
663 | jz .handle_in_dword |
||
664 | jmp .nogp |
||
665 | .handle_in_word: |
||
666 | .handle_out_word: |
||
667 | movzx ebx, word [esp+v86_regs.edx] |
||
668 | mov ecx, 2 |
||
669 | jmp .invalid_io |
||
670 | .handle_in_dword: |
||
671 | .handle_out_dword: |
||
672 | .invalid_io_dword: |
||
673 | movzx ebx, word [esp+v86_regs.edx] |
||
674 | mov ecx, 4 |
||
675 | .invalid_io: |
||
676 | mov esi, v86_io_str1 |
||
677 | call sys_msg_board_str |
||
678 | mov eax, ebx |
||
679 | call sys_msg_board_dword |
||
680 | mov esi, v86_io_byte |
||
681 | cmp ecx, 1 |
||
682 | jz @f |
||
683 | mov esi, v86_io_word |
||
684 | cmp ecx, 2 |
||
685 | jz @f |
||
686 | mov esi, v86_io_dword |
||
687 | @@: |
||
688 | call sys_msg_board_str |
||
689 | if DEBUG_SHOW_IO |
||
690 | mov edx, ebx |
||
691 | mov ebx, 200 |
||
692 | call delay_hs |
||
693 | mov esi, [esp+v86_regs.size+10h+4] |
||
694 | mov eax, [esi+V86_machine.iopm] |
||
695 | @@: |
||
696 | btr [eax], edx |
||
697 | inc edx |
||
698 | loop @b |
||
699 | popad |
||
700 | iretd |
||
701 | else |
||
702 | mov eax, 2 |
||
703 | jmp .exit |
||
704 | end if |
||
705 | .nogp: |
||
706 | |||
707 | mov esi, v86_exc_str1 |
||
708 | call sys_msg_board_str |
||
709 | mov al, bl |
||
710 | call sys_msg_board_byte |
||
711 | mov esi, v86_exc_str2 |
||
712 | call sys_msg_board_str |
||
713 | mov ax, [esp+32+4] |
||
714 | call sys_msg_board_word |
||
715 | mov esi, v86_exc_str3 |
||
716 | call sys_msg_board_str |
||
717 | mov ax, [esp+32] |
||
718 | call sys_msg_board_word |
||
719 | mov esi, v86_exc_str4 |
||
720 | call sys_msg_board_str |
||
721 | mov ecx, 8 |
||
722 | movzx edx, word [esp+32+4] |
||
723 | shl edx, 4 |
||
724 | add edx, [esp+32] |
||
725 | @@: |
||
2384 | hidnplayr | 726 | mov esi, [esp+sizeof.v86_regs+10h+4] |
2288 | clevermous | 727 | mov eax, edx |
728 | call v86_get_lin_addr |
||
729 | cmp eax, 0x1000 |
||
730 | jb .nopage |
||
731 | mov esi, v86_exc_str3-2 |
||
732 | call sys_msg_board_str |
||
733 | mov al, [edx] |
||
734 | call sys_msg_board_byte |
||
735 | inc edx |
||
736 | loop @b |
||
737 | jmp @f |
||
738 | .nopage: |
||
739 | mov esi, v86_exc_str5 |
||
740 | call sys_msg_board_str |
||
741 | @@: |
||
742 | mov esi, v86_newline |
||
743 | call sys_msg_board_str |
||
744 | mov eax, 1 |
||
745 | jmp .exit |
||
746 | |||
747 | .done: |
||
748 | xor eax, eax |
||
749 | |||
750 | .exit: |
||
2384 | hidnplayr | 751 | mov [esp+sizeof.v86_regs+10h+1Ch], eax |
752 | mov [esp+sizeof.v86_regs+10h+18h], ebx |
||
2288 | clevermous | 753 | |
2384 | hidnplayr | 754 | mov edx, [esp+sizeof.v86_regs+10h+14h] |
2288 | clevermous | 755 | cmp edx, -1 |
756 | jz @f |
||
757 | dec [v86_irqhooks+edx*8+4] |
||
758 | jnz @f |
||
759 | and [v86_irqhooks+edx*8], 0 |
||
760 | @@: |
||
761 | |||
762 | mov esi, esp |
||
2384 | hidnplayr | 763 | mov edi, [esi+sizeof.v86_regs+10h+10h] |
764 | add edi, sizeof.v86_regs |
||
765 | mov ecx, sizeof.v86_regs/4 |
||
2288 | clevermous | 766 | rep movsd |
767 | mov esp, esi |
||
768 | |||
769 | cli |
||
5130 | serge | 770 | mov ecx, [current_slot] |
2288 | clevermous | 771 | pop eax |
5130 | serge | 772 | |
773 | mov [ecx+APPDATA.saved_esp0], eax |
||
2288 | clevermous | 774 | mov [tss._esp0], eax |
775 | pop eax |
||
5130 | serge | 776 | mov [ecx+APPDATA.process], eax |
777 | mov [current_process], eax |
||
2288 | clevermous | 778 | pop ebx |
5130 | serge | 779 | mov dword [ecx+APPDATA.io_map+4], ebx |
2288 | clevermous | 780 | mov dword [page_tabs + (tss._io_map_1 shr 10)], ebx |
781 | pop ebx |
||
5130 | serge | 782 | mov dword [ecx+APPDATA.io_map], ebx |
2288 | clevermous | 783 | mov dword [page_tabs + (tss._io_map_0 shr 10)], ebx |
5130 | serge | 784 | mov eax, [eax+PROC.pdt_0_phys] |
2288 | clevermous | 785 | mov cr3, eax |
786 | sti |
||
787 | |||
788 | popad |
||
789 | ret |
||
790 | |||
791 | ;my05: |
||
792 | ; mov dx, 30C2h |
||
793 | ; mov cx, 4 |
||
794 | ;.0: |
||
795 | ; in al, dx |
||
796 | ; cmp al, 0FFh |
||
797 | ; jz @f |
||
798 | ; test al, 4 |
||
799 | ; jnz .1 |
||
800 | ;@@: |
||
801 | ; add dx, 8 |
||
802 | ; in al, dx |
||
803 | ; cmp al, 0FFh |
||
804 | ; jz @f |
||
805 | ; test al, 4 |
||
806 | ; jnz .1 |
||
807 | ;@@: |
||
808 | ; loop .0 |
||
809 | ; ret |
||
810 | ;.1: |
||
811 | ; or al, 84h |
||
812 | ; out dx, al |
||
813 | ;.2: |
||
814 | ; mov dx, 30F7h |
||
815 | ; in al, dx |
||
816 | ; mov byte [BOOT_VAR + 48Eh], 0FFh |
||
817 | ; ret |
||
818 | |||
819 | align 4 |
||
820 | v86_irq: |
||
821 | ; push irq/pushad/jmp v86_irq |
||
822 | ; ebp = irq |
||
823 | lea esi, [esp+1Ch] |
||
824 | lea edi, [esi+4] |
||
825 | mov ecx, 8 |
||
826 | std |
||
827 | rep movsd |
||
828 | cld |
||
829 | mov edi, ebp |
||
830 | pop eax |
||
831 | v86_irq2: |
||
832 | mov esi, [v86_irqhooks+edi*8] ; get VM handle |
||
5130 | serge | 833 | mov eax, [esi+V86_machine.process] |
2288 | clevermous | 834 | mov ecx, [CURRENT_TASK] |
835 | shl ecx, 8 |
||
5130 | serge | 836 | cmp [SLOT_BASE+ecx+APPDATA.process], eax |
2288 | clevermous | 837 | jnz .notcurrent |
838 | lea eax, [edi+8] |
||
839 | cmp al, 10h |
||
840 | mov ah, 1 |
||
841 | jb @f |
||
842 | add al, 60h |
||
843 | @@: |
||
844 | jmp v86_exc_c.simulate_int |
||
845 | .notcurrent: |
||
846 | mov ebx, SLOT_BASE + 0x100 |
||
847 | mov ecx, [TASK_COUNT] |
||
848 | .scan: |
||
5130 | serge | 849 | cmp [ebx+APPDATA.process], eax |
2288 | clevermous | 850 | jnz .cont |
851 | push ecx |
||
852 | mov ecx, [ebx+APPDATA.saved_esp0] |
||
2384 | hidnplayr | 853 | cmp word [ecx-sizeof.v86_regs+v86_regs.esp], 6 |
2288 | clevermous | 854 | jb .cont2 |
2384 | hidnplayr | 855 | movzx edx, word [ecx-sizeof.v86_regs+v86_regs.ss] |
2288 | clevermous | 856 | shl edx, 4 |
857 | push eax |
||
2384 | hidnplayr | 858 | movzx eax, word [ecx-sizeof.v86_regs+v86_regs.esp] |
2288 | clevermous | 859 | sub eax, 6 |
860 | add edx, eax |
||
861 | mov eax, edx |
||
862 | call v86_get_lin_addr |
||
863 | cmp eax, 0x1000 |
||
864 | jb .cont3 |
||
865 | lea eax, [edx+5] |
||
866 | call v86_get_lin_addr |
||
867 | cmp eax, 0x1000 |
||
868 | jb .cont3 |
||
869 | pop eax |
||
870 | pop ecx |
||
871 | jmp .found |
||
872 | .cont3: |
||
873 | pop eax |
||
874 | .cont2: |
||
875 | pop ecx |
||
876 | .cont: |
||
3400 | hidnplayr | 877 | add ebx, 0x100 |
2288 | clevermous | 878 | loop .scan |
879 | mov ecx, edi |
||
880 | call irq_eoi |
||
881 | popad |
||
882 | iretd |
||
883 | .found: |
||
5130 | serge | 884 | mov eax, [eax+PROC.pdt_0_phys] |
2288 | clevermous | 885 | mov cr3, eax |
3696 | clevermous | 886 | mov esi, [ebx+APPDATA.saved_esp0] |
2384 | hidnplayr | 887 | sub word [esi-sizeof.v86_regs+v86_regs.esp], 6 |
888 | mov ecx, [esi-sizeof.v86_regs+v86_regs.eip] |
||
2288 | clevermous | 889 | mov word [edx], cx |
2384 | hidnplayr | 890 | mov ecx, [esi-sizeof.v86_regs+v86_regs.cs] |
2288 | clevermous | 891 | mov word [edx+2], cx |
2384 | hidnplayr | 892 | mov ecx, [esi-sizeof.v86_regs+v86_regs.eflags] |
2288 | clevermous | 893 | mov word [edx+4], cx |
894 | lea eax, [edi+8] |
||
895 | cmp al, 10h |
||
896 | jb @f |
||
897 | add al, 60h |
||
898 | @@: |
||
899 | mov cx, [eax*4] |
||
2384 | hidnplayr | 900 | mov word [esi-sizeof.v86_regs+v86_regs.eip], cx |
2288 | clevermous | 901 | mov cx, [eax*4+2] |
2384 | hidnplayr | 902 | mov word [esi-sizeof.v86_regs+v86_regs.cs], cx |
903 | and byte [esi-sizeof.v86_regs+v86_regs.eflags+1], not 3 |
||
2288 | clevermous | 904 | call update_counters |
905 | lea edi, [ebx + 0x100000000 - SLOT_BASE] |
||
906 | shr edi, 3 |
||
3696 | clevermous | 907 | add edi, CURRENT_TASK |
2288 | clevermous | 908 | call find_next_task.found |
909 | call do_change_task |
||
910 | popad |
||
911 | iretd |