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Rev | Author | Line No. | Line |
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1 | ha | 1 | if ~defined newprocess_inc |
2 | newprocess_inc_fix: |
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3 | newprocess_inc fix newprocess_inc_fix |
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4 | include "mem.inc" |
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5 | include "memmanag.inc" |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | ;;Working with new types of processes. |
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8 | ;;Author: Khalyavin Andrey halyavin@land.ru |
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9 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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10 | iglobal |
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11 | new_process_loading db 'K : New Process - loading',13,10,0 |
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12 | new_process_running db 'K : New Process - done',13,10,0 |
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13 | start_not_enough_memory db 'K : New Process - not enough memory',13,10,0 |
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14 | endg |
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15 | ;----------------------------------------------------------------------------- |
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16 | |||
17 | find_new_process_place: |
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18 | ;input: |
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19 | ; none |
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20 | ;result: |
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21 | ; eax=[new_process_place]<>0 - ok |
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22 | ; 0 - failed. |
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23 | ;This function find least empty slot. |
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24 | ;It doesn't increase [0x3004]! |
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25 | mov eax,0x3000+second_base_address |
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26 | push ebx |
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27 | mov ebx,[0x3004] |
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28 | inc ebx |
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29 | shl ebx,5 |
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30 | add ebx,eax ;ebx - address of process information for (last+1) slot |
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31 | .newprocessplace: |
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32 | ;eax = address of process information for current slot |
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33 | cmp eax,ebx |
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34 | jz .endnewprocessplace ;empty slot after high boundary |
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35 | add eax,0x20 |
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36 | cmp word [eax+0xa],9 ;check process state, 9 means that process slot is empty |
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37 | jnz .newprocessplace |
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38 | .endnewprocessplace: |
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39 | mov ebx,eax |
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40 | sub eax,0x3000+second_base_address |
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41 | shr eax,5 ;calculate slot index |
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42 | cmp eax,256 |
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43 | jge .failed ;it should be <256 |
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44 | mov word [ebx+0xa],9 ;set process state to 9 (for slot after hight boundary) |
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45 | mov [new_process_place],eax ;save process slot |
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46 | pop ebx |
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47 | ret |
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48 | .failed: |
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49 | xor eax,eax |
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50 | pop ebx |
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51 | ret |
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52 | ;----------------------------------------------------------------------------- |
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4 | poddubny | 53 | safe_sti: |
54 | cmp byte [0xe000], 1 |
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55 | jne @f |
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56 | sti |
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57 | @@:ret |
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58 | |||
1 | ha | 59 | new_start_application_floppy: |
60 | ;input: |
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61 | ; eax - pointer to filename |
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62 | ; ebx - parameters to pass |
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63 | ;result: |
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64 | ; eax - pid of new process |
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65 | ; or 0 if call fails. |
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5 | halyavin | 66 | mov [appl_path],edi |
1 | ha | 67 | pushad |
68 | mov esi,new_process_loading |
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69 | call sys_msg_board_str ;write to debug board |
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70 | |||
71 | ;wait application_table_status mutex |
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72 | .table_status: |
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73 | cli |
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74 | cmp [application_table_status],0 |
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75 | jz .stf |
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76 | sti |
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77 | call change_task |
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78 | jmp .table_status |
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79 | .stf: |
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80 | call set_application_table_status |
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81 | ;we can change system tables now |
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82 | push edi |
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83 | push ebx |
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84 | push eax |
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85 | call find_new_process_place ;find empty process slot |
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86 | sti |
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87 | test eax,eax |
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88 | jz .failed |
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89 | |||
90 | mov edi,eax |
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91 | shl edi,8 |
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92 | add edi,0x80000 |
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93 | mov ecx,256/4 |
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94 | xor eax,eax |
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95 | cld |
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96 | rep stosd ;clean extended information about process |
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97 | |||
98 | ;set new process name |
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5 | halyavin | 99 | xor eax,eax |
100 | mov [appl_path_size],eax |
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101 | mov eax,[esp] ;+8] |
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1 | ha | 102 | .find_last_byte: |
103 | cmp byte [eax],0 |
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104 | jz .find_last_byte_end |
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105 | inc eax |
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5 | halyavin | 106 | inc [appl_path_size] |
1 | ha | 107 | jmp .find_last_byte |
5 | halyavin | 108 | .find_last_byte_end: |
109 | add [appl_path_size],24 |
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1 | ha | 110 | sub eax,11 ;last 11 bytes = application name |
111 | ; mov eax,[esp] ;eax - pointer to file name |
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112 | mov ebx,[new_process_place] |
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113 | shl ebx,8 |
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114 | add ebx,0x80000 |
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115 | mov ecx,11 |
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116 | call memmove |
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117 | |||
118 | ;read header of file |
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119 | mov eax,[esp] |
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120 | mov ebx,1 ;index of first block |
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121 | mov ecx,2 ;number of blocks |
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122 | mov edx,0x90000 ;temp area |
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123 | mov esi,12 ;file name length |
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124 | mov edi,[esp+8] |
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125 | ; cli |
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126 | call floppy_fileread ;read file from FD |
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127 | ; sti |
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128 | cmp eax,0 |
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129 | jne .cleanfailed |
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130 | ;check MENUET signature |
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131 | cmp [0x90000],dword 'MENU' |
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132 | jnz .cleanfailed |
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133 | cmp [0x90004],word 'ET' |
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134 | jnz .cleanfailed |
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135 | |||
136 | call get_app_params ;parse header fields |
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137 | cmp esi,0 |
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138 | jz .cleanfailed |
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139 | |||
140 | mov eax,[new_process_place] |
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141 | call create_app_cr3_table ;create page directory for new process |
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142 | test eax,eax |
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143 | jz .cleanfailed_mem |
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144 | |||
145 | call MEM_Get_Linear_Address ;calculate linear address of it |
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146 | |||
147 | mov ebx,std_application_base_address |
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148 | mov ecx,[app_mem] |
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149 | add ecx,4095 |
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150 | shr ecx,12 |
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151 | mov edx,eax |
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152 | call mem_alloc_specified_region ;allocate memory for application |
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153 | test eax,eax |
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9 | halyavin | 154 | jz .cleanfailed_mem1 |
1 | ha | 155 | |
156 | mov eax,[edx+(std_application_base_address shr 20)] |
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157 | and eax,not (4096-1) ;eax - physical address of first (for application memory) page table |
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158 | call MEM_Get_Linear_Address |
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159 | mov edx,eax |
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160 | |||
161 | ;read file |
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162 | mov ebx,1 |
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163 | mov esi,12 ;length of file name |
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164 | .loop1: |
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165 | ;edx = linear address of current page table entry |
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166 | ;ebx = index of current block in file |
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167 | push edx |
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168 | mov eax,[edx] |
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169 | and eax,not (4096-1) |
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170 | call MEM_Get_Linear_Address |
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171 | mov edx,eax ;read file block to current page |
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172 | mov eax,[esp+4] ;restore pointer to file name |
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173 | mov ecx,8 ;number of blocks read |
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174 | push ebx |
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175 | mov edi,[esp+16] |
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176 | ; cli |
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177 | call floppy_fileread |
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178 | ;ebx=file size |
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179 | ; sti |
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180 | pop ecx |
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181 | shr ebx,9 |
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182 | cmp ecx,ebx |
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183 | jg .endloop1 ;if end of file? |
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184 | mov ebx,ecx |
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185 | test eax,eax |
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186 | jnz .endloop1 ;check io errors |
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187 | pop edx |
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188 | add ebx,8 ;go to next page |
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189 | add edx,4 |
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190 | jmp .loop1 |
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191 | |||
192 | .endloop1: |
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193 | add esp,8+4 ;pop linear address of page table entry and pointer to file name |
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194 | call new_start_application_fl.add_app_parameters |
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195 | mov [esp+28],eax |
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196 | popad |
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197 | ret |
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9 | halyavin | 198 | |
199 | .cleanfailed_mem1: |
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200 | ;there is mem for directory entry, but there is no mem for pages |
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201 | ;so free directory entry |
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202 | mov eax,[new_process_place] |
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203 | shl eax,8 |
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204 | mov eax,[0x80000+eax+0xB8] |
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205 | call MEM_Free_Page |
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1 | ha | 206 | .cleanfailed_mem: |
9 | halyavin | 207 | ;there is no mem for directory entry, display message. |
1 | ha | 208 | mov esi,start_not_enough_memory |
209 | call sys_msg_board_str |
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210 | .cleanfailed: ;clean process name |
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9 | halyavin | 211 | ;can't read file, clean process name. |
212 | ;this avoid problems with panel application. |
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1 | ha | 213 | mov edi,[new_process_place] |
214 | shl edi,8 |
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215 | add edi,0x80000 |
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216 | mov ecx,11 |
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217 | mov eax,' ' |
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218 | cld |
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219 | rep stosb |
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220 | .failed: |
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9 | halyavin | 221 | ;no more slots |
1 | ha | 222 | add esp,8+4 |
223 | mov [application_table_status],0 |
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224 | popad |
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225 | sti |
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226 | mov eax,-1 |
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227 | ret |
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228 | |||
229 | ;----------------------------------------------------------------------------- |
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230 | new_start_application_fl: |
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231 | ;input: |
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232 | ; eax - pointer to filename |
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233 | ; ebx - parameters to pass |
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234 | ;result: |
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235 | ; eax - pid of new process |
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236 | ; or 0 if call fails. |
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5 | halyavin | 237 | mov [appl_path],edi |
238 | mov [appl_path_size],36 |
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1 | ha | 239 | pushad |
240 | mov esi,new_process_loading |
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241 | call sys_msg_board_str ;write to debug board |
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242 | |||
243 | ;wait application_table_status mutex |
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244 | .table_status: |
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245 | cli |
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246 | cmp [application_table_status],0 |
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247 | jz .stf |
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248 | sti |
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249 | call change_task |
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250 | jmp .table_status |
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251 | .stf: |
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252 | call set_application_table_status |
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253 | ;we can change system tables now |
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254 | push ebx |
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255 | push eax |
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256 | call find_new_process_place ;find empty process slot |
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4 | poddubny | 257 | call safe_sti |
1 | ha | 258 | test eax,eax |
259 | jz .failed |
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260 | |||
261 | mov edi,eax |
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262 | shl edi,8 |
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263 | add edi,0x80000 |
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264 | mov ecx,256/4 |
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265 | xor eax,eax |
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266 | cld |
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267 | rep stosd ;clean extended information about process |
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268 | |||
269 | ;set new process name |
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270 | mov eax,[esp] ;eax - pointer to file name |
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271 | mov ebx,[new_process_place] |
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272 | shl ebx,8 |
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273 | add ebx,0x80000 |
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274 | mov ecx,11 |
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275 | call memmove |
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276 | |||
277 | ;read header of file |
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278 | mov ebx,1 ;index of first block |
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279 | mov ecx,2 ;number of blocks |
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280 | mov edx,0x90000 ;temp area |
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281 | mov esi,12 ;file name length |
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282 | cli |
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283 | call fileread ;read file from RD |
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4 | poddubny | 284 | call safe_sti |
1 | ha | 285 | cmp eax,0 |
286 | jne .cleanfailed |
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287 | ;check MENUET signature |
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288 | cmp [0x90000],dword 'MENU' |
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289 | jnz .cleanfailed |
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290 | cmp [0x90004],word 'ET' |
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291 | jnz .cleanfailed |
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292 | |||
293 | call get_app_params ;parse header fields |
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294 | cmp esi,0 |
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295 | jz .failed |
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296 | |||
297 | mov eax,[new_process_place] |
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298 | call create_app_cr3_table ;create page directory for new process |
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299 | test eax,eax |
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300 | jz .cleanfailed_mem |
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301 | |||
302 | call MEM_Get_Linear_Address ;calculate linear address of it |
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303 | |||
304 | mov ebx,std_application_base_address |
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305 | mov ecx,[app_mem] |
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306 | add ecx,4095 |
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307 | shr ecx,12 |
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308 | mov edx,eax |
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309 | call mem_alloc_specified_region ;allocate memory for application |
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310 | test eax,eax |
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9 | halyavin | 311 | jz .cleanfailed_mem1 |
1 | ha | 312 | |
313 | mov eax,[edx+(std_application_base_address shr 20)] |
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314 | and eax,not (4096-1) ;eax - physical address of first (for application memory) page table |
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315 | call MEM_Get_Linear_Address |
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316 | mov edx,eax |
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317 | |||
318 | ;read file |
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319 | mov ebx,1 |
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320 | mov esi,12 ;length of file name |
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321 | .loop1: |
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322 | ;edx = linear address of current page table entry |
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323 | ;ebx = index of current block in file |
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324 | push edx |
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325 | mov eax,[edx] |
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326 | and eax,not (4096-1) |
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327 | call MEM_Get_Linear_Address |
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328 | mov edx,eax ;read file block to current page |
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329 | mov eax,[esp+4] ;restore pointer to file name |
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330 | mov ecx,8 ;number of blocks read |
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331 | push ebx |
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332 | cli |
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333 | call fileread |
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334 | ;ebx=file size |
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4 | poddubny | 335 | call safe_sti |
1 | ha | 336 | pop ecx |
337 | shr ebx,9 |
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338 | cmp ecx,ebx |
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339 | jg .endloop1 ;if end of file? |
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340 | mov ebx,ecx |
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341 | test eax,eax |
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342 | jnz .endloop1 ;check io errors |
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343 | pop edx |
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344 | add ebx,8 ;go to next page |
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345 | add edx,4 |
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346 | jmp .loop1 |
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347 | |||
348 | .endloop1: |
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349 | add esp,8 ;pop linear address of page table entry and pointer to file name |
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350 | call .add_app_parameters |
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351 | mov [esp+28],eax |
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352 | popad |
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353 | ret |
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354 | |||
9 | halyavin | 355 | .cleanfailed_mem1: |
356 | ;there is mem for directory entry, but there is no mem for pages |
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357 | ;so free directory entry |
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358 | mov eax,[new_process_place] |
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359 | shl eax,8 |
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360 | mov eax,[0x80000+eax+0xB8] |
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361 | call MEM_Free_Page |
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1 | ha | 362 | .cleanfailed_mem: |
9 | halyavin | 363 | ;there is no mem for directory entry, display message. |
1 | ha | 364 | mov esi,start_not_enough_memory |
365 | call sys_msg_board_str |
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366 | .cleanfailed: ;clean process name |
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9 | halyavin | 367 | ;can't read file, clean process name. |
368 | ;this avoid problems with panel application. |
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1 | ha | 369 | mov edi,[new_process_place] |
370 | shl edi,8 |
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371 | add edi,0x80000 |
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372 | mov ecx,11 |
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373 | mov eax,' ' |
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374 | cld |
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375 | rep stosb |
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376 | .failed: |
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9 | halyavin | 377 | ;no more slots |
1 | ha | 378 | add esp,8 |
379 | mov [application_table_status],0 |
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380 | popad |
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4 | poddubny | 381 | call safe_sti |
1 | ha | 382 | mov eax,-1 |
383 | ret |
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384 | |||
385 | .add_app_parameters: |
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386 | ;input: |
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387 | ; [esp] - pointer to parameters |
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388 | ; [esp+4]-[esp+36] pushad registers. |
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389 | ;result |
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390 | ; eax - pid of new process |
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391 | ; or zero if failed |
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392 | cli |
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393 | mov ebx,[new_process_place] |
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394 | cmp ebx,[0x3004] |
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395 | jle .noinc |
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396 | inc dword [0x3004] ;update number of processes |
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397 | .noinc: |
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398 | |||
399 | ; mov ebx,[new_process_place] |
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400 | ;set 0x8c field of extended information about process |
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401 | ;(size of application memory) |
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402 | shl ebx,8 |
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403 | mov eax,[app_mem] |
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404 | mov [second_base_address+0x80000+0x8c+ebx],eax |
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405 | ;set 0x10 field of information about process |
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406 | ;(application base address) |
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407 | ; mov ebx,[new_process_place] |
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408 | ; shl ebx,5 |
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409 | shr ebx,3 |
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410 | mov dword [second_base_address+0x3000+ebx+0x10],std_application_base_address |
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411 | |||
412 | ;add command line parameters |
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413 | .add_command_line: |
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414 | mov edx,[app_i_param] |
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415 | test edx,edx |
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416 | jz .no_command_line ;application don't need parameters |
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417 | mov eax,[esp+4] |
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418 | test eax,eax |
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419 | jz .no_command_line ;no parameters specified |
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420 | ;calculate parameter length |
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421 | mov esi,eax |
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422 | xor ecx,ecx |
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423 | .command_line_len: |
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424 | cmp byte [esi],0 |
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425 | jz .command_line_len_end |
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426 | inc esi |
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427 | inc ecx |
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428 | cmp ecx,256 |
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429 | jl .command_line_len |
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430 | |||
431 | .command_line_len_end: |
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432 | ;ecx - parameter length |
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433 | ;edx - address of parameters in new process address space |
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434 | mov ebx,eax ;ebx - address of parameters in our address space |
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435 | mov eax,[new_process_place] |
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436 | call write_process_memory ;copy parameters to new process address space |
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437 | |||
438 | .no_command_line: |
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5 | halyavin | 439 | ;****************************************************************** |
440 | mov edx,[app_i_icon] |
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441 | test edx,edx |
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442 | jz .no_command_line_1 ;application don't need path of file |
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443 | mov ebx,[appl_path] |
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444 | mov ecx,[appl_path_size] |
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445 | mov eax,[new_process_place] |
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446 | call write_process_memory ;copy path of file to new process address space |
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447 | .no_command_line_1: |
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448 | ;****************************************************************** |
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1 | ha | 449 | mov ebx,[new_process_place] |
450 | mov eax,ebx |
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451 | shl ebx,5 |
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452 | add ebx,0x3000 ;ebx - pointer to information about process |
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453 | mov [ebx+0xe],al ;set window number on screen = process slot |
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454 | |||
455 | mov [ebx],dword 1+2+4 ;set default event flags (see 40 function) |
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456 | |||
457 | inc dword [process_number] |
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458 | mov eax,[process_number] |
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459 | mov [ebx+4],eax ;set PID |
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460 | |||
461 | mov ecx,ebx |
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462 | add ecx,draw_data-0x3000 ;ecx - pointer to draw data |
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463 | ;set draw data to full screen |
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464 | mov [ecx+0],dword 0 |
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465 | mov [ecx+4],dword 0 |
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466 | mov eax,[0xfe00] |
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467 | mov [ecx+8],eax |
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468 | mov eax,[0xfe04] |
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469 | mov [ecx+12],eax |
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470 | ;set cr3 register in TSS of application |
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471 | mov ecx,[new_process_place] |
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472 | shl ecx,8 |
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473 | mov eax,[0x800B8+ecx] |
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474 | add eax,8+16 ;add flags |
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475 | mov [l.cr3],eax |
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476 | |||
477 | mov eax,[app_start] |
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478 | mov [l.eip],eax ;set eip in TSS |
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479 | mov eax,[app_esp] |
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480 | mov [l.esp],eax ;set stack in TSS |
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481 | |||
482 | ;gdt |
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4 | poddubny | 483 | ;mov ebx,[new_process_place] |
484 | ;shl ebx,3 |
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1 | ha | 485 | mov ax,app_code ;ax - selector of code segment |
4 | poddubny | 486 | ;add ax,bx |
1 | ha | 487 | mov [l.cs],ax |
488 | mov ax,app_data |
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4 | poddubny | 489 | ;add ax,bx ;ax - selector of data segment |
1 | ha | 490 | mov [l.ss],ax |
491 | mov [l.ds],ax |
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492 | mov [l.es],ax |
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493 | mov [l.fs],ax |
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494 | mov ax,graph_data ;ax - selector of graphic segment |
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495 | mov [l.gs],ax |
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496 | mov [l.io],word 128 |
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497 | mov [l.eflags],dword 0x11202 |
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498 | mov [l.ss0],os_data |
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4 | poddubny | 499 | mov ebx,[new_process_place] |
500 | shl ebx,12 |
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3 | halyavin | 501 | add ebx,sysint_stack_data |
502 | mov [l.esp0],ebx |
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1 | ha | 503 | |
504 | ;copy tss to it place |
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505 | mov eax,tss_sceleton |
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506 | mov ebx,[new_process_place] |
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507 | imul ebx,tss_step |
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508 | add ebx,tss_data ;ebx - address of application TSS |
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509 | mov ecx,120 |
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510 | call memmove |
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511 | |||
512 | ;Add IO access table - bit array of permitted ports |
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513 | or eax,-1 |
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514 | mov edi,[new_process_place] |
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515 | imul edi,tss_step |
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516 | add edi,tss_data+128 |
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517 | mov ecx,2048 |
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518 | cld |
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519 | rep stosd ;full access to 2048*8=16384 ports |
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520 | |||
521 | mov ecx,ebx ;ecx - address of application TSS |
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522 | mov edi,[new_process_place] |
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523 | shl edi,3 |
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524 | ;set TSS descriptor |
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525 | mov [edi+gdts+tss0+0],word tss_step ;limit (size) |
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526 | mov [edi+gdts+tss0+2],cx ;part of offset |
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527 | mov eax,ecx |
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528 | shr eax,16 |
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529 | mov [edi+gdts+tss0+4],al ;part of offset |
||
530 | mov [edi+gdts+tss0+7],ah ;part of offset |
||
531 | mov [edi+gdts+tss0+5],word 01010000b*256+11101001b ;system flags |
||
532 | |||
533 | |||
534 | ;flush keyboard and buttons queue |
||
535 | mov [0xf400],byte 0 |
||
536 | mov [0xf500],byte 0 |
||
537 | |||
538 | mov edi,[new_process_place] |
||
539 | shl edi,5 |
||
540 | add edi,window_data |
||
541 | mov ebx,[new_process_place] |
||
542 | movzx esi,word [0xC000+ebx*2] |
||
543 | lea esi,[0xC400+esi*2] |
||
544 | call windowactivate ;gui initialization |
||
545 | |||
546 | mov ebx,[new_process_place] |
||
547 | shl ebx,5 |
||
548 | mov [0x3000+ebx+0xa],byte 0 ;set process state - running |
||
549 | |||
550 | mov esi,new_process_running |
||
551 | call sys_msg_board_str ;output information about succefull startup |
||
552 | |||
553 | ; add esp,4 ;pop pointer to parameters |
||
554 | ; popad |
||
555 | mov eax,[process_number] ;set result |
||
556 | mov [application_table_status],0 ;unlock application_table_status mutex |
||
4 | poddubny | 557 | call safe_sti |
1 | ha | 558 | ret 4 |
559 | ;----------------------------------------------------------------------------- |
||
560 | new_sys_threads: |
||
561 | ;eax=1 - create thread |
||
562 | ; ebx=thread start |
||
563 | ; ecx=thread stack value |
||
564 | ;result: |
||
565 | ; eax=pid |
||
566 | pushad |
||
567 | |||
568 | cmp eax,1 |
||
569 | jnz .ret ;other subfunctions |
||
570 | mov esi,new_process_loading |
||
571 | call sys_msg_board_str |
||
572 | ;lock application_table_status mutex |
||
573 | .table_status: |
||
574 | cli |
||
575 | cmp [application_table_status],0 |
||
576 | je .stf |
||
577 | sti |
||
578 | call change_task |
||
579 | jmp .table_status |
||
580 | .stf: |
||
581 | call set_application_table_status |
||
582 | ;find free process slot |
||
583 | |||
584 | call find_new_process_place |
||
585 | test eax,eax |
||
586 | jz .failed |
||
587 | |||
588 | ;set parameters for thread |
||
589 | xor eax,eax |
||
590 | mov [app_i_param],eax |
||
591 | mov [app_i_icon],eax |
||
592 | mov [app_start],ebx |
||
593 | mov [app_esp],ecx |
||
594 | |||
595 | mov esi,[0x3000] |
||
596 | shl esi,8 |
||
597 | add esi,0x80000 |
||
598 | mov ebx,esi ;ebx=esi - pointer to extended information about current thread |
||
599 | |||
600 | mov edi,[new_process_place] |
||
601 | shl edi,8 |
||
602 | add edi,0x80000 |
||
603 | mov edx,edi ;edx=edi - pointer to extended infomation about new thread |
||
604 | mov ecx,256/4 |
||
605 | rep stosd ;clean extended information about new thread |
||
606 | mov edi,edx |
||
607 | mov ecx,11 |
||
608 | rep movsb ;copy process name |
||
609 | mov eax,[ebx+0x8c] |
||
610 | mov [app_mem],eax ;set memory size |
||
611 | mov eax,[ebx+0xb8] |
||
612 | mov [edx+0xb8],eax ;copy page directory |
||
613 | ; mov eax,[new_process_place] |
||
614 | ; mov ebx,[0x3000] |
||
615 | ; call addreference_app_cr3_table |
||
616 | |||
617 | push 0 ;no parameters |
||
618 | call new_start_application_fl.add_app_parameters ;start thread |
||
619 | mov [esp+28],eax |
||
620 | popad |
||
621 | ret |
||
622 | |||
623 | .failed: |
||
624 | sti |
||
625 | popad |
||
626 | mov eax,-1 |
||
627 | ret |
||
628 | .ret: |
||
629 | popad |
||
630 | ret |
||
631 | ;----------------------------------------------------------------------------- |
||
632 | new_mem_resize: |
||
633 | ;input: |
||
634 | ; ebx - new size |
||
635 | ;result: |
||
636 | ; [esp+36]:=0 - normal |
||
637 | ; [esp+36]:=1 - error |
||
638 | ;This function set new application memory size. |
||
639 | mov esi,ebx ;save new size |
||
640 | add ebx,4095 |
||
641 | and ebx,not (4096-1) ;round up size |
||
642 | mov ecx,[0x3000] |
||
643 | shl ecx,8 |
||
644 | mov edx,[0x8008C+ecx] |
||
645 | add edx,4095 |
||
646 | and edx,not (4096-1) ;old size |
||
647 | mov eax,[0x800B8+ecx] |
||
648 | call MEM_Get_Linear_Address |
||
649 | ;eax - linear address of page directory |
||
650 | call MEM_Heap_Lock ;guarantee that two threads willn't |
||
651 | ;change memory size simultaneously |
||
652 | cmp ebx,edx |
||
653 | ; mov esi,ebx ;save new size |
||
654 | jg .expand |
||
655 | |||
656 | .free: |
||
657 | sub edx,ebx |
||
658 | jz .unlock ;do nothing |
||
659 | mov ecx,edx |
||
660 | shr ecx,12 |
||
661 | add ebx,std_application_base_address |
||
662 | call mem_free_specified_region ;free unnecessary pages |
||
663 | jmp .unlock |
||
664 | |||
665 | .expand: |
||
666 | sub ebx,edx |
||
667 | mov ecx,ebx |
||
668 | shr ecx,12 |
||
669 | mov ebx,edx |
||
670 | add ebx,std_application_base_address |
||
671 | call mem_alloc_specified_region ;alloc necessary pages |
||
672 | test eax,eax |
||
673 | jz .failed ;not enough memory |
||
674 | |||
675 | .unlock: |
||
676 | mov ebx,esi |
||
677 | mov eax,[0x3000] |
||
678 | shl eax,8 |
||
679 | mov [eax+0x8008c],ebx ;write new memory size |
||
680 | ;search threads and update |
||
681 | ;application memory size infomation |
||
682 | mov ecx,[eax+0x800b8] |
||
683 | mov eax,2 |
||
684 | |||
685 | .search_threads: |
||
686 | ;eax = current slot |
||
687 | ;ebx = new memory size |
||
688 | ;ecx = page directory |
||
689 | cmp eax,[0x3004] |
||
690 | jg .search_threads_end |
||
691 | mov edx,eax |
||
692 | shl edx,5 |
||
693 | cmp word [0x3000+edx+0xa],9 ;if slot empty? |
||
694 | jz .search_threads_next |
||
695 | shl edx,3 |
||
696 | cmp [edx+0x800b8],ecx ;if it is our thread? |
||
697 | jnz .search_threads_next |
||
698 | mov [edx+0x8008c],ebx ;update memory size |
||
699 | .search_threads_next: |
||
700 | inc eax |
||
701 | jmp .search_threads |
||
702 | .search_threads_end: |
||
703 | |||
704 | call MEM_Heap_UnLock |
||
705 | mov dword [esp+36],0 |
||
706 | ret |
||
707 | |||
708 | .failed: |
||
709 | call MEM_Heap_UnLock |
||
710 | mov dword [esp+36],1 |
||
711 | ret |
||
712 | ;----------------------------------------------------------------------------- |
||
713 | pid_to_slot: |
||
714 | ;Input: |
||
715 | ; eax - pid of process |
||
716 | ;Output: |
||
717 | ; eax - slot of process or 0 if process don't exists |
||
718 | ;Search process by PID. |
||
719 | push ebx |
||
720 | push ecx |
||
721 | mov ebx,[0x3004] |
||
722 | shl ebx,5 |
||
723 | mov ecx,2*32 |
||
724 | |||
725 | .loop: |
||
726 | ;ecx=offset of current process info entry |
||
727 | ;ebx=maximum permitted offset |
||
728 | cmp byte [second_base_address+0x3000+ecx+0xa],9 |
||
729 | jz .endloop ;skip empty slots |
||
730 | cmp [second_base_address+0x3000+ecx+0x4],eax ;check PID |
||
731 | jz .pid_found |
||
732 | .endloop: |
||
733 | add ecx,32 |
||
734 | cmp ecx,ebx |
||
735 | jle .loop |
||
736 | |||
737 | pop ecx |
||
738 | pop ebx |
||
739 | xor eax,eax |
||
740 | ret |
||
741 | |||
742 | .pid_found: |
||
743 | shr ecx,5 |
||
744 | mov eax,ecx ;convert offset to index of slot |
||
745 | pop ecx |
||
746 | pop ebx |
||
747 | ret |
||
748 | ;----------------------------------------------------------------------------- |
||
749 | is_new_process: |
||
750 | ;Input: |
||
751 | ; eax - process slot |
||
752 | ;Output: |
||
753 | ; eax=1 - it is new process |
||
754 | ; eax=0 - it is old process |
||
755 | ; shl eax,5 |
||
756 | ; mov eax,[second_base_address+0x3000+eax+0x10] |
||
757 | ; cmp eax,std_application_base_address ;check base address of application |
||
758 | ; jz .new_process |
||
759 | ; xor eax,eax |
||
760 | ; ret |
||
761 | |||
762 | ;.new_process: |
||
763 | mov eax,1 |
||
764 | ret |
||
765 | ;----------------------------------------------------------------------------- |
||
766 | write_process_memory: |
||
767 | ;Input: |
||
768 | ; eax - process slot |
||
769 | ; ebx - buffer address |
||
770 | ; ecx - buffer size |
||
771 | ; edx - start address in other process |
||
772 | ;Output: |
||
773 | ; eax - number of bytes written |
||
774 | pushad |
||
775 | shl eax,8 |
||
776 | mov eax,[0x80000+eax+0xB8] |
||
777 | call MEM_Get_Linear_Address |
||
778 | mov ebp,eax |
||
779 | ;ebp=linear address of page directory of other process. |
||
780 | add edx,std_application_base_address ;convert to linear address |
||
781 | test ecx,ecx |
||
782 | jle .ret |
||
783 | |||
784 | .write_loop: |
||
785 | ;ebx = current buffer address |
||
786 | ;ecx>0 = current size |
||
787 | ;edx = current address in other process |
||
788 | ;ebp = linear address of page directory |
||
789 | |||
790 | call MEM_Heap_Lock ;cli |
||
791 | mov esi,edx |
||
792 | shr esi,22 |
||
793 | mov eax,[ebp+4*esi] ;find page directory entry |
||
794 | and eax,not (4096-1) ;clear flags |
||
795 | test eax,eax |
||
796 | jz .page_not_found |
||
797 | call MEM_Get_Linear_Address ;calculate linear address of page table |
||
798 | test eax,eax |
||
799 | jz .page_not_found |
||
800 | mov esi,edx |
||
801 | shr esi,12 |
||
802 | and esi,1023 |
||
803 | mov eax,[eax+4*esi] ;find page table entry |
||
804 | and eax,not (4096-1) |
||
805 | test eax,eax |
||
806 | jz .page_not_found |
||
807 | call MEM_Get_Linear_Address ;calculate linear address of page |
||
808 | test eax,eax |
||
809 | jz .page_not_found |
||
810 | mov edi,eax |
||
811 | call MEM_Add_Reference_Linear;guarantee that page willn't disappear |
||
812 | call MEM_Heap_UnLock ;sti |
||
813 | |||
814 | mov esi,edx |
||
815 | and esi,4095 |
||
816 | add edi,esi ;add offset in page |
||
817 | ;edi = linear address corresponding edx in other process |
||
818 | sub esi,4096 |
||
819 | neg esi ;esi - number of remaining bytes in page |
||
820 | cmp esi,ecx |
||
821 | jl .min_ecx |
||
822 | mov esi,ecx |
||
823 | .min_ecx: ;esi=min(ecx,esi) - number of bytes to write |
||
824 | sub ecx,esi |
||
825 | push ecx |
||
826 | mov ecx,esi ;ecx - number of bytes to write |
||
827 | mov esi,ebx ;esi - source, edi - destination |
||
828 | add edx,ecx ;move pointer in address space of other process |
||
829 | push edi |
||
830 | |||
831 | ;move ecx bytes |
||
832 | test ecx,3 |
||
833 | jnz .not_aligned |
||
834 | shr ecx,2 |
||
835 | rep movsd |
||
836 | jmp .next_iter |
||
837 | .not_aligned: |
||
838 | rep movsb |
||
839 | .next_iter: |
||
840 | |||
841 | pop eax |
||
842 | and eax,not (4096-1) ;eax - linear address of current page |
||
843 | call MEM_Free_Page_Linear ;free reference |
||
844 | mov ebx,esi ;new pointer to buffer - movsb automaticaly advance it. |
||
845 | pop ecx ;restore number of remaining bytes |
||
846 | test ecx,ecx |
||
847 | jnz .write_loop |
||
848 | .ret: |
||
849 | popad |
||
850 | mov eax,ecx |
||
851 | ret |
||
852 | |||
853 | .page_not_found: |
||
854 | call MEM_Heap_UnLock ;error has appeared in critical region |
||
855 | sub ecx,[esp+24] ;[esp+24]<-->ecx |
||
856 | neg ecx ;ecx=number_of_written_bytes |
||
857 | mov [esp+28],ecx ;[esp+28]<-->eax |
||
858 | popad |
||
859 | ret |
||
860 | ;----------------------------------------------------------------------------- |
||
861 | syscall_test: |
||
862 | ;for testing memory manager from applications. |
||
863 | mov edx,ecx |
||
864 | mov ecx,ebx |
||
865 | call trans_address |
||
866 | mov ebx,eax |
||
867 | mov eax,[0x3000] |
||
868 | call read_process_memory |
||
869 | ret |
||
870 | ;----------------------------------------------------------------------------- |
||
871 | read_process_memory: |
||
872 | ;Input: |
||
873 | ; eax - process slot |
||
874 | ; ebx - buffer address |
||
875 | ; ecx - buffer size |
||
876 | ; edx - start address in other process |
||
877 | ;Output: |
||
878 | ; eax - number of bytes read. |
||
879 | pushad |
||
880 | shl eax,8 |
||
881 | mov eax,[0x80000+eax+0xB8] |
||
882 | call MEM_Get_Linear_Address |
||
883 | mov ebp,eax |
||
884 | add edx,std_application_base_address |
||
885 | .read_loop: |
||
886 | ;ebx = current buffer address |
||
887 | ;ecx>0 = current size |
||
888 | ;edx = current address in other process |
||
889 | ;ebp = linear address of page directory |
||
890 | |||
891 | call MEM_Heap_Lock ;cli |
||
892 | mov esi,edx |
||
893 | shr esi,22 |
||
894 | mov eax,[ebp+4*esi] ;find page directory entry |
||
895 | and eax,not (4096-1) |
||
896 | test eax,eax |
||
897 | jz .page_not_found |
||
898 | call MEM_Get_Linear_Address |
||
899 | test eax,eax |
||
900 | jz .page_not_found |
||
901 | mov esi,edx |
||
902 | shr esi,12 |
||
903 | and esi,1023 |
||
904 | mov eax,[eax+4*esi] ;find page table entry |
||
905 | and eax,not (4096-1) |
||
906 | test eax,eax |
||
907 | jz .page_not_found |
||
908 | call MEM_Get_Linear_Address ;calculate linear address of page |
||
909 | test eax,eax |
||
910 | jz .page_not_found |
||
911 | mov esi,eax |
||
912 | call MEM_Add_Reference_Linear;guarantee that page willn't disappear |
||
913 | call MEM_Heap_UnLock ;sti |
||
914 | |||
915 | mov edi,edx |
||
916 | and edi,4095 |
||
917 | add esi,edi ;add offset in page |
||
918 | ;esi = linear address corresponding edx in other process |
||
919 | sub edi,4096 |
||
920 | neg edi |
||
921 | |||
922 | ;edi=min(edi,ecx) - number of bytes to copy |
||
923 | cmp edi,ecx |
||
924 | jl .min_ecx |
||
925 | mov edi,ecx |
||
926 | .min_ecx: |
||
927 | |||
928 | sub ecx,edi ;update size of remaining bytes |
||
929 | add edx,edi ;update current pointer in other address space. |
||
930 | push ecx |
||
931 | mov ecx,edi ;ecx - number of bytes to read |
||
932 | mov edi,ebx ;esi - source, edi - destination |
||
933 | push esi |
||
934 | ;move ecx bytes |
||
935 | test ecx,3 |
||
936 | jnz .not_aligned |
||
937 | shr ecx,2 |
||
938 | rep movsd |
||
939 | jmp .next_iter |
||
940 | .not_aligned: |
||
941 | rep movsb |
||
942 | .next_iter: |
||
943 | pop eax |
||
944 | and eax,not (4096-1) ;eax - linear address of current page |
||
945 | call MEM_Free_Page_Linear ;free reference |
||
946 | mov ebx,edi ;new pointer to buffer - movsb automaticaly advance it. |
||
947 | pop ecx ;restore number of remaining bytes |
||
948 | test ecx,ecx |
||
949 | jnz .read_loop |
||
950 | |||
951 | popad |
||
952 | mov eax,ecx |
||
953 | ret |
||
954 | |||
955 | .page_not_found: |
||
956 | call MEM_Heap_UnLock ;error has appeared in critical region |
||
957 | sub ecx,[esp+24] ;[esp+24]<-->ecx |
||
958 | neg ecx ;ecx=number_of_read_bytes |
||
959 | mov [esp+28],ecx ;[esp+28]<-->eax |
||
960 | popad |
||
961 | ret |
||
962 | ;----------------------------------------------------------------------------- |
||
963 | check_region: |
||
964 | ;input: |
||
965 | ; ebx - start of buffer |
||
966 | ; ecx - size of buffer |
||
967 | ;result: |
||
968 | ; eax = 1 region lays in app memory |
||
969 | ; eax = 0 region don't lays in app memory |
||
970 | mov eax,[0x3000] |
||
971 | jmp check_process_region |
||
972 | ;----------------------------------------------------------------------------- |
||
973 | check_process_region: |
||
974 | ;input: |
||
975 | ; eax - slot |
||
976 | ; ebx - start of buffer |
||
977 | ; ecx - size of buffer |
||
978 | ;result: |
||
979 | ; eax = 1 region lays in app memory |
||
980 | ; eax = 0 region don't lays in app memory |
||
981 | test ecx,ecx |
||
982 | jle .ok |
||
983 | shl eax,5 |
||
984 | cmp word [0x3000+eax+0xa],0 |
||
985 | jnz .failed |
||
986 | shl eax,3 |
||
987 | mov eax,[0x80000+eax+0xb8] |
||
988 | test eax,eax |
||
989 | jz .failed |
||
990 | call MEM_Get_Linear_Address |
||
991 | push ebx |
||
992 | push ecx |
||
993 | push edx |
||
994 | mov edx,ebx |
||
995 | and edx,not (4096-1) |
||
996 | sub ebx,edx |
||
997 | add ecx,ebx |
||
998 | mov ebx,edx |
||
999 | add ecx,(4096-1) |
||
1000 | and ecx,not (4096-1) |
||
1001 | .loop: |
||
1002 | ;eax - linear address of page directory |
||
1003 | ;ebx - current page |
||
1004 | ;ecx - current size |
||
1005 | mov edx,ebx |
||
1006 | shr edx,22 |
||
1007 | mov edx,[eax+4*edx] |
||
1008 | and edx,not (4096-1) |
||
1009 | test edx,edx |
||
1010 | jz .failed1 |
||
1011 | push eax |
||
1012 | mov eax,edx |
||
1013 | call MEM_Get_Linear_Address |
||
1014 | mov edx,ebx |
||
1015 | shr edx,12 |
||
1016 | and edx,(1024-1) |
||
1017 | mov eax,[eax+4*edx] |
||
1018 | and eax,not (4096-1) |
||
1019 | test eax,eax |
||
1020 | pop eax |
||
1021 | jz .failed1 |
||
1022 | add ebx,4096 |
||
1023 | sub ecx,4096 |
||
1024 | jg .loop |
||
1025 | pop edx |
||
1026 | pop ecx |
||
1027 | pop ebx |
||
1028 | .ok: |
||
1029 | mov eax,1 |
||
1030 | ret |
||
1031 | |||
1032 | .failed1: |
||
1033 | pop edx |
||
1034 | pop ecx |
||
1035 | pop ebx |
||
1036 | .failed: |
||
1037 | xor eax,eax |
||
1038 | ret |
||
1039 | ;----------------------------------------------------------------------------- |
||
1040 | new_sys_ipc: |
||
1041 | ;input: |
||
1042 | ; eax=1 - set ipc buffer area |
||
1043 | ; ebx=address of buffer |
||
1044 | ; ecx=size of buffer |
||
1045 | ; eax=2 - send message |
||
1046 | ; ebx=PID |
||
1047 | ; ecx=address of message |
||
1048 | ; edx=size of message |
||
1049 | cmp eax,1 |
||
1050 | jnz .no_ipc_def |
||
1051 | ;set ipc buffer area |
||
1052 | mov edi,[0x3000] |
||
1053 | shl edi,8 |
||
1054 | add edi,0x80000 |
||
1055 | cli |
||
1056 | mov [edi+0xA0],ebx ;set fields in extended information area |
||
1057 | mov [edi+0xA4],ecx |
||
1058 | sti |
||
1059 | mov [esp+36],dword 0 ;success |
||
1060 | ret |
||
1061 | |||
1062 | .no_ipc_def: |
||
1063 | cmp eax,2 |
||
1064 | jnz .no_ipc_send |
||
1065 | ;send message |
||
1066 | cli |
||
1067 | ;obtain slot from PID |
||
1068 | mov eax,ebx |
||
1069 | call pid_to_slot |
||
1070 | test eax,eax |
||
1071 | jz .no_pid |
||
1072 | mov ebp,eax |
||
1073 | ;ebp = slot of other process |
||
1074 | shl eax,8 |
||
1075 | mov edi,[eax+0x80000+0xa0] ;is ipc area defined? |
||
1076 | test edi,edi |
||
1077 | jz .no_ipc_area |
||
1078 | mov esi,[eax+0x80000+0xa4] ;esi - size of buffer |
||
1079 | push dword -1 ;temp variable for read_process_memory |
||
1080 | mov ebx,esp |
||
1081 | push ecx |
||
1082 | push edx |
||
1083 | mov ecx,4 ;read 4 bytes |
||
1084 | mov eax,ebp |
||
1085 | mov edx,edi ;from beginning of buffer. |
||
1086 | call read_process_memory |
||
1087 | mov eax,[esp+8] |
||
1088 | test eax,eax |
||
1089 | jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now |
||
1090 | add edx,4 ;move to next 4 bytes |
||
1091 | mov eax,ebp |
||
1092 | call read_process_memory ;read size of occupied space in buffer |
||
1093 | sub esi,8 |
||
1094 | sub esi,[esp] |
||
1095 | sub esi,[esp+8] ;esi=(buffer size)-(occupied size)-(message size)-(header of message size) |
||
1096 | js .buffer_overflow ;esi<0 - not enough memory in buffer |
||
1097 | mov esi,[esp+8] ;previous offset |
||
1098 | add dword [esp+8],8 |
||
1099 | mov edi,[esp] |
||
1100 | add [esp+8],edi ;add (size of message)+(size of header of message) to [buffer+4] |
||
1101 | mov eax,ebp |
||
1102 | call write_process_memory |
||
1103 | add edx,esi |
||
1104 | sub edx,4 ;move to beginning of place for our message |
||
1105 | mov eax,[second_base_address+0x3010] |
||
1106 | mov eax,[eax+0x4] ;eax - our PID |
||
1107 | mov [esp+8],eax |
||
1108 | mov eax,ebp |
||
1109 | call write_process_memory ;write PID |
||
1110 | mov ebx,esp ;address of size of message |
||
1111 | mov eax,ebp |
||
1112 | add edx,4 |
||
1113 | call write_process_memory ;write size of message |
||
1114 | add edx,4 |
||
1115 | pop ecx ;ecx - size of message |
||
1116 | pop eax |
||
1117 | call trans_address |
||
1118 | mov ebx,eax ;ebx - linear address of message |
||
1119 | add esp,4 ;pop temporary variable |
||
1120 | mov eax,ebp |
||
1121 | call write_process_memory ;write message |
||
1122 | sti |
||
1123 | ;awake other process |
||
1124 | shl ebp,8 |
||
1125 | mov eax,ebp |
||
1126 | or [eax+0x800A8],dword 0x40 |
||
1127 | |||
1128 | cmp dword [check_idle_semaphore],20 |
||
1129 | jge .ipc_no_cis |
||
1130 | mov dword [check_idle_semaphore],5 |
||
1131 | .ipc_no_cis: |
||
1132 | mov dword [esp+36],0 |
||
1133 | ret |
||
1134 | .no_ipc_send: |
||
1135 | mov dword [esp+36],-1 |
||
1136 | ret |
||
1137 | .no_pid: |
||
1138 | sti |
||
1139 | mov dword [esp+36],4 |
||
1140 | ret |
||
1141 | .no_ipc_area: |
||
1142 | sti |
||
1143 | mov dword [esp+36],1 |
||
1144 | ret |
||
1145 | .ipc_blocked: |
||
1146 | sti |
||
1147 | add esp,12 |
||
1148 | mov dword [esp+36],2 |
||
1149 | ret |
||
1150 | .buffer_overflow: |
||
1151 | sti |
||
1152 | add esp,12 |
||
1153 | mov dword [esp+36],3 |
||
1154 | ret |
||
1155 | ;----------------------------------------------------------------------------- |
||
1156 | trans_address: |
||
1157 | ;Input |
||
1158 | ; eax - application address |
||
1159 | ;Output |
||
1160 | ; eax - linear address for kernel |
||
1161 | add eax,std_application_base_address |
||
1162 | ret |
||
1163 | ;----------------------------------------------------------------------------- |
||
1164 | new_start_application_hd: |
||
1165 | ;eax - file name (kernel address) |
||
1166 | ;ebx - file name length |
||
1167 | ;ecx - work area (kernel address) |
||
1168 | ;ebp - parameters |
||
5 | halyavin | 1169 | mov [appl_path],edi |
1 | ha | 1170 | pushad |
1171 | |||
1172 | mov esi,new_process_loading |
||
1173 | call sys_msg_board_str ;write message to message board |
||
1174 | |||
1175 | ;lock application_table_status mutex |
||
1176 | .table_status: |
||
1177 | cli |
||
1178 | cmp [application_table_status],0 |
||
1179 | jz .stf |
||
1180 | sti |
||
1181 | call change_task |
||
1182 | jmp .table_status |
||
1183 | .stf: |
||
1184 | call set_application_table_status |
||
1185 | |||
1186 | push ebp |
||
1187 | push ebx |
||
1188 | push eax |
||
1189 | push ecx |
||
1190 | call find_new_process_place ;find new process slot |
||
1191 | sti |
||
1192 | test eax,eax |
||
1193 | jz .failed |
||
1194 | |||
5 | halyavin | 1195 | ;write application name |
1196 | xor eax,eax |
||
1197 | mov [appl_path_size],eax |
||
1 | ha | 1198 | mov eax,[esp+4] |
1199 | .find_last_byte: |
||
1200 | cmp byte [eax],0 |
||
1201 | jz .find_last_byte_end |
||
1202 | inc eax |
||
5 | halyavin | 1203 | inc [appl_path_size] |
1 | ha | 1204 | jmp .find_last_byte |
5 | halyavin | 1205 | .find_last_byte_end: |
1206 | add [appl_path_size],24 |
||
1 | ha | 1207 | lea esi,[eax-11] ;last 11 bytes = application name |
1208 | mov edi,[new_process_place] |
||
1209 | shl edi,8 |
||
1210 | add edi,0x80000 |
||
1211 | mov ecx,11 |
||
1212 | cld |
||
1213 | rep movsb ;copy name to extended information about process |
||
1214 | |||
1215 | ;read header |
||
1216 | mov eax,[esp+4] ;file name |
||
1217 | mov esi,[esp] ;work area |
||
1218 | mov ecx,1 ;read from first block |
||
1219 | mov edx,1 ;read 1 block |
||
1220 | call read_hd_file |
||
1221 | test eax,eax |
||
1222 | jnz .cleanfailed |
||
1223 | |||
1224 | mov esi,[esp] |
||
1225 | ;check menuet signature |
||
1226 | cmp [esi+1024+0],dword 'MENU' ;read_hd_file function write file to +1024 offset |
||
1227 | jnz .cleanfailed |
||
1228 | cmp [esi+1024+4],word 'ET' |
||
1229 | jnz .cleanfailed |
||
1230 | add esi,1024 |
||
1231 | mov edi,0x90000 |
||
1232 | mov ecx,512/4 |
||
1233 | cld |
||
1234 | rep movsd ;copy first block to 0x90000 address for get_app_params function |
||
1235 | call get_app_params |
||
1236 | test esi,esi |
||
1237 | jz .cleanfailed |
||
1238 | |||
1239 | mov eax,[new_process_place] |
||
1240 | call create_app_cr3_table ;create page directory |
||
1241 | test eax,eax |
||
1242 | jz .cleanfailed_mem |
||
1243 | |||
1244 | call MEM_Get_Linear_Address |
||
1245 | |||
1246 | mov ebx,std_application_base_address |
||
1247 | mov ecx,[app_mem] |
||
1248 | add ecx,4096-1 |
||
1249 | shr ecx,12 |
||
1250 | mov edx,eax ;edx - linear address of page directory |
||
1251 | call mem_alloc_specified_region ;allocate memory for application |
||
1252 | test eax,eax |
||
9 | halyavin | 1253 | jz .cleanfailed_mem1 |
1 | ha | 1254 | |
1255 | add edx,(std_application_base_address shr 20) |
||
1256 | mov eax,[edx] |
||
1257 | and eax,not (4096-1) |
||
1258 | call MEM_Get_Linear_Address |
||
1259 | push edx ;save pointer to first page table |
||
1260 | mov edx,eax |
||
1261 | ;read file |
||
1262 | mov ecx,1 |
||
1263 | xor ebp,ebp |
||
1264 | .loop1: |
||
1265 | ;[esp] - pointer to current page directory entry |
||
1266 | ;edx - pointer to current page table |
||
1267 | ;ebp - offset in page |
||
1268 | ;ecx - current cluster |
||
1269 | push edx |
||
1270 | mov eax,[esp+12] ;file name |
||
1271 | mov ebx,[esp+16] ;file name length |
||
1272 | mov esi,[esp+8] ;work area |
||
1273 | mov edx,1 ;number of blocks to read |
||
1274 | push ecx |
||
1275 | push ebp |
||
1276 | cli |
||
1277 | call read_hd_file |
||
1278 | sti |
||
1279 | pop ebp |
||
1280 | test eax,eax |
||
1281 | jnz .endloop1 ;check io errors |
||
1282 | |||
1283 | mov esi,[esp+8+4] ;work area |
||
1284 | add esi,1024 |
||
1285 | mov eax,[esp+4] ;current page table |
||
1286 | mov eax,[eax] |
||
1287 | and eax,not (4096-1) |
||
1288 | call MEM_Get_Linear_Address;calculate linear page address |
||
1289 | lea edi,[eax+ebp] ;add page offset |
||
1290 | mov ecx,512/4 |
||
1291 | cld |
||
1292 | rep movsd ;copy data |
||
1293 | |||
1294 | pop ecx |
||
1295 | inc ecx ;next block |
||
1296 | mov eax,[app_i_end] ;todo: precalculate ([app_i_end]+4095)/4096 |
||
1297 | add eax,512-1 |
||
1298 | shr eax,9 ;calculate application image size |
||
1299 | cmp ecx,eax |
||
1300 | jg .endloop11 |
||
1301 | pop edx |
||
1302 | add ebp,512 ;new offset |
||
1303 | test ebp,4096 |
||
1304 | jz .loop1 |
||
1305 | xor ebp,ebp |
||
1306 | add edx,4 ;go to next page |
||
1307 | test edx,(4096-1) |
||
1308 | jnz .loop1 |
||
1309 | add dword [esp],4 ;go to next directory entry |
||
1310 | mov eax,[esp] |
||
1311 | mov eax,[eax] |
||
1312 | and eax,not (4096-1) |
||
1313 | call MEM_Get_Linear_Address |
||
1314 | mov edx,eax |
||
1315 | jmp .loop1 |
||
1316 | .endloop1: |
||
1317 | add esp,4 ;pop ecx |
||
1318 | .endloop11: |
||
1319 | add esp,4+4 ;pop edx, pop edx |
||
1320 | |||
1321 | ;add_app_parameters |
||
1322 | add esp,12 ;now pointer to parameters is on the top of the stack |
||
1323 | call new_start_application_fl.add_app_parameters ;start process |
||
1324 | mov [esp+28],eax |
||
1325 | popad |
||
1326 | ret |
||
1327 | |||
9 | halyavin | 1328 | .cleanfailed_mem1: |
1329 | ;there is mem for directory entry, but there is no mem for pages |
||
1330 | ;so free directory entry |
||
1331 | mov eax,[new_process_place] |
||
1332 | shl eax,8 |
||
1333 | mov eax,[0x80000+eax+0xB8] |
||
1334 | call MEM_Free_Page |
||
1 | ha | 1335 | .cleanfailed_mem: |
9 | halyavin | 1336 | ;there is no mem for directory entry, display message. |
1 | ha | 1337 | mov esi,start_not_enough_memory |
1338 | call sys_msg_board_str |
||
1339 | .cleanfailed: ;clean process name |
||
9 | halyavin | 1340 | ;can't read file, clean process name. |
1341 | ;this avoid problems with panel application. |
||
1 | ha | 1342 | mov edi,[new_process_place] |
1343 | shl edi,8 |
||
1344 | add edi,0x80000 |
||
1345 | mov ecx,11 |
||
1346 | mov eax,' ' |
||
1347 | cld |
||
1348 | rep stosb |
||
1349 | .failed: |
||
9 | halyavin | 1350 | ;no more slots |
1 | ha | 1351 | add esp,16 |
1352 | popad |
||
1353 | mov eax,-1 |
||
1354 | mov [application_table_status],0 |
||
1355 | sti |
||
1356 | ret |
||
1357 | end if0>>-->-->-->-->256 |