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Rev | Author | Line No. | Line |
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129 | mikedld | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; FAT32.INC ;; |
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4 | ;; ;; |
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131 | diamond | 5 | ;; FAT16/32 functions for KolibriOS ;; |
129 | mikedld | 6 | ;; ;; |
7 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
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8 | ;; ;; |
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9 | ;; See file COPYING for details ;; |
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131 | diamond | 10 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
129 | mikedld | 11 | ;; 23.06.2006 LFN start application - diamond ;; |
12 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
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13 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
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14 | ;; 04.05.2006 LFN read folder - diamond ;; |
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15 | ;; 29.04.2006 Elimination of hangup after the ;; |
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16 | ;; expiration hd_wait_timeout - Mario79 ;; |
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17 | ;; 23.04.2006 LFN read file - diamond ;; |
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18 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
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19 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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20 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
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21 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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22 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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23 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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24 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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25 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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26 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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27 | ;; 08.11.2004 rename - ATV ;; |
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28 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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29 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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30 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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31 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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32 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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33 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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34 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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35 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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36 | ;; 20.5.2002 Hd status check - VT ;; |
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37 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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38 | ;; ;; |
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39 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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40 | |||
41 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
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42 | |||
43 | ERROR_SUCCESS = 0 |
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44 | ERROR_DISK_BASE = 1 |
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45 | ERROR_UNSUPPORTED_FS = 2 |
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46 | ERROR_UNKNOWN_FS = 3 |
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47 | ERROR_PARTITION = 4 |
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48 | ERROR_FILE_NOT_FOUND = 5 |
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49 | ERROR_END_OF_FILE = 6 |
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50 | ERROR_MEMORY_POINTER = 7 |
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51 | ERROR_DISK_FULL = 8 |
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52 | ERROR_FAT_TABLE = 9 |
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53 | ERROR_ACCESS_DENIED = 10 |
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54 | |||
55 | PUSHAD_EAX equ [esp+28] |
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56 | PUSHAD_ECX equ [esp+24] |
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57 | PUSHAD_EDX equ [esp+20] |
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58 | PUSHAD_EBX equ [esp+16] |
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59 | PUSHAD_EBP equ [esp+8] |
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60 | PUSHAD_ESI equ [esp+4] |
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61 | PUSHAD_EDI equ [esp+0] |
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62 | |||
63 | cluster dd 0 ; used by file_write,makedir,append |
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64 | partition_count dd 0 ; partitions found by set_FAT32_variables |
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65 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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66 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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67 | |||
68 | hd_error dd 0 ; set by wait_for_sector_buffer |
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69 | hd_setup dd 0 |
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70 | hd_wait_timeout dd 0 |
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71 | |||
72 | cluster_tmp dd 0 ; used by analyze_directory |
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73 | ; and analyze_directory_to_write |
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74 | |||
75 | file_size dd 0 ; used by file_read |
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76 | |||
77 | sector_tmp dd 0 ; used by rename,append,file_write |
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78 | entry_pos dd 0 ; used by rename,append,file_write |
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79 | |||
80 | old_filesize dd 0 ; used by append |
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81 | new_filepos dd 0 ; used by append |
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82 | bytes2write dd 0 ; used by append |
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83 | |||
84 | cache_search_start dd 0 ; used by find_empty_slot |
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85 | |||
86 | fat_in_cache dd -1 |
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87 | fat_cache: times 512 db 0 |
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88 | |||
89 | uglobal |
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90 | Sector512: ; label for dev_hdcd.inc |
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91 | buffer: times 512 db 0 |
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92 | deltree_buffer: times 512 db 0 |
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133 | diamond | 93 | fsinfo_buffer: times 512 db 0 |
129 | mikedld | 94 | endg |
95 | |||
96 | iglobal |
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97 | NewDirEntry1 db ". ",0x10 |
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98 | times 20 db 0 |
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99 | NewDirEntry2 db ".. ",0x10 |
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100 | times 20 db 0 |
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101 | endg |
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102 | |||
103 | uglobal |
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104 | dir_entry: times 32 db 0 |
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105 | |||
106 | startpath: times 255 db 0 |
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107 | |||
108 | fat16_root db 0 ; flag for fat16 rootdir |
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109 | fat_change db 0 ; 1=fat has changed |
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110 | |||
111 | endg |
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112 | |||
113 | reserve_hd1: |
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114 | |||
115 | cli |
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116 | cmp [hd1_status],0 |
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117 | je reserve_ok1 |
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118 | |||
119 | sti |
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120 | call change_task |
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121 | jmp reserve_hd1 |
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122 | |||
123 | reserve_ok1: |
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124 | |||
125 | push eax |
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126 | mov eax,[0x3000] |
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127 | shl eax,5 |
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128 | mov eax,[eax+0x3000+TASKDATA.pid] |
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129 | mov [hd1_status],eax |
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130 | pop eax |
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131 | sti |
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132 | ret |
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133 | ;******************************************** |
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134 | reserve_hd_channel: |
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135 | cmp [hdbase], 0x1F0 |
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136 | jne .IDE_Channel_2 |
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137 | .IDE_Channel_1: |
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138 | cli |
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139 | cmp [IDE_Channel_1],0 |
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140 | je .reserve_ok_1 |
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141 | sti |
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142 | call change_task |
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143 | jmp .IDE_Channel_1 |
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144 | .IDE_Channel_2: |
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145 | cli |
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146 | cmp [IDE_Channel_2],0 |
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147 | je .reserve_ok_2 |
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148 | sti |
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149 | call change_task |
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150 | jmp .IDE_Channel_1 |
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151 | .reserve_ok_1: |
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152 | mov [IDE_Channel_1],1 |
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153 | ret |
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154 | .reserve_ok_2: |
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155 | mov [IDE_Channel_2],1 |
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156 | ret |
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157 | |||
158 | free_hd_channel: |
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159 | cmp [hdbase], 0x1F0 |
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160 | jne .IDE_Channel_2 |
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161 | .IDE_Channel_1: |
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162 | mov [IDE_Channel_1],0 |
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163 | ret |
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164 | .IDE_Channel_2: |
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165 | mov [IDE_Channel_2],0 |
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166 | ret |
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167 | ;******************************************** |
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168 | clear_hd_cache: |
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169 | |||
170 | push eax ecx edi |
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171 | mov edi,0x600000 |
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172 | mov ecx,16384 |
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173 | xor eax,eax |
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174 | cld |
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175 | rep stosd ; clear hd cache with 0 |
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176 | mov [cache_search_start],eax |
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177 | mov [fat_in_cache],-1 |
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178 | mov [fat_change],0 |
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179 | pop edi ecx eax |
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180 | ret |
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181 | |||
182 | problem_partition db 0 ; used for partitions search |
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183 | |||
184 | include 'part_set.inc' |
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185 | |||
186 | set_FAT: |
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187 | ;-------------------------------- |
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188 | ; input : EAX = cluster |
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189 | ; EDX = value to save |
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190 | ; output : EDX = old value |
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191 | ;-------------------------------- |
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192 | push eax ebx esi |
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193 | |||
194 | cmp eax,2 |
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195 | jb sfc_error |
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196 | cmp eax,[LAST_CLUSTER] |
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197 | ja sfc_error |
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198 | cmp [fat_type],16 |
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199 | je sfc_1 |
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200 | add eax,eax |
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201 | sfc_1: |
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202 | add eax,eax |
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203 | mov esi,511 |
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204 | and esi,eax ; esi = position in fat sector |
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205 | shr eax,9 ; eax = fat sector |
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206 | add eax,[FAT_START] |
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207 | mov ebx,fat_cache |
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208 | |||
209 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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210 | je sfc_in_cache ; yes |
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211 | |||
212 | cmp [fat_change],0 ; is fat changed? |
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213 | je sfc_no_change ; no |
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214 | call write_fat_sector ; yes. write it into disk |
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215 | cmp [hd_error],0 |
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216 | jne sfc_error |
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217 | |||
218 | sfc_no_change: |
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219 | mov [fat_in_cache],eax ; save fat sector |
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220 | call hd_read |
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221 | cmp [hd_error],0 |
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222 | jne sfc_error |
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223 | |||
224 | |||
225 | sfc_in_cache: |
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226 | cmp [fat_type],16 |
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227 | jne sfc_test32 |
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228 | |||
229 | sfc_set16: |
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230 | xchg [ebx+esi],dx ; save new value and get old value |
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231 | jmp sfc_write |
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232 | |||
233 | sfc_test32: |
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234 | mov eax,[fatMASK] |
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235 | |||
236 | sfc_set32: |
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237 | and edx,eax |
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238 | xor eax,-1 ; mask for high bits |
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239 | and eax,[ebx+esi] ; get high 4 bits |
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240 | or eax,edx |
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241 | mov edx,[ebx+esi] ; get old value |
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242 | mov [ebx+esi],eax ; save new value |
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243 | |||
244 | sfc_write: |
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245 | mov [fat_change],1 ; fat has changed |
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246 | |||
247 | sfc_nonzero: |
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248 | and edx,[fatMASK] |
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249 | |||
250 | sfc_error: |
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251 | pop esi ebx eax |
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252 | ret |
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253 | |||
254 | |||
255 | get_FAT: |
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256 | ;-------------------------------- |
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257 | ; input : EAX = cluster |
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258 | ; output : EAX = next cluster |
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259 | ;-------------------------------- |
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260 | push ebx esi |
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261 | |||
262 | cmp [fat_type],16 |
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263 | je gfc_1 |
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264 | add eax,eax |
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265 | gfc_1: |
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266 | add eax,eax |
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267 | mov esi,511 |
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268 | and esi,eax ; esi = position in fat sector |
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269 | shr eax,9 ; eax = fat sector |
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270 | add eax,[FAT_START] |
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271 | mov ebx,fat_cache |
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272 | |||
273 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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274 | je gfc_in_cache |
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275 | |||
276 | cmp [fat_change],0 ; is fat changed? |
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277 | je gfc_no_change ; no |
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278 | call write_fat_sector ; yes. write it into disk |
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279 | cmp [hd_error],0 |
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280 | jne hd_error_01 |
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281 | |||
282 | gfc_no_change: |
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283 | mov [fat_in_cache],eax |
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284 | call hd_read |
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285 | cmp [hd_error],0 |
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286 | jne hd_error_01 |
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287 | |||
288 | gfc_in_cache: |
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289 | mov eax,[ebx+esi] |
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290 | and eax,[fatMASK] |
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291 | hd_error_01: |
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292 | pop esi ebx |
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293 | ret |
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294 | |||
295 | |||
296 | get_free_FAT: |
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297 | ;----------------------------------------------------------- |
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298 | ; input : EAX = # cluster for start the searching |
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299 | ; output : if CARRY=0 EAX = # first cluster found free |
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300 | ; if CARRY=1 disk full |
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301 | ; Note : for more speed need to use fat_cache directly |
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302 | ;----------------------------------------------------------- |
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303 | push ecx |
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304 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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305 | sub ecx,2 |
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306 | |||
307 | gff_test: |
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308 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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309 | jbe gff_in_range |
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310 | mov eax,2 |
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311 | |||
312 | gff_in_range: |
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313 | push eax |
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314 | call get_FAT ; get cluster state |
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315 | cmp [hd_error],0 |
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316 | jne gff_not_found_1 |
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317 | |||
318 | test eax,eax ; is it free? |
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319 | pop eax |
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320 | je gff_found ; yes |
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321 | inc eax ; next cluster |
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322 | dec ecx ; is all checked? |
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323 | jns gff_test ; no |
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324 | |||
325 | gff_not_found_1: |
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326 | add esp,4 |
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327 | gff_not_found: |
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328 | pop ecx ; yes. disk is full |
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329 | stc |
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330 | ret |
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331 | |||
332 | gff_found: |
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333 | pop ecx |
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334 | clc |
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335 | ret |
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336 | |||
337 | |||
338 | write_fat_sector: |
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339 | ;----------------------------------------------------------- |
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340 | ; write changed fat to disk |
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341 | ;----------------------------------------------------------- |
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342 | push eax ebx ecx |
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343 | |||
344 | mov [fat_change],0 |
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345 | mov eax,[fat_in_cache] |
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346 | cmp eax,-1 |
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347 | jz write_fat_not_used |
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348 | mov ebx,fat_cache |
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349 | mov ecx,[NUMBER_OF_FATS] |
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350 | |||
351 | write_next_fat: |
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352 | call hd_write |
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353 | cmp [hd_error],0 |
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354 | jne write_fat_not_used |
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355 | |||
356 | add eax,[SECTORS_PER_FAT] |
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357 | dec ecx |
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358 | jnz write_next_fat |
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359 | |||
360 | write_fat_not_used: |
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361 | pop ecx ebx eax |
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362 | ret |
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363 | |||
364 | |||
365 | analyze_directory: |
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366 | ;----------------------------------------------------------- |
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367 | ; input : EAX = first cluster of the directory |
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368 | ; EBX = pointer to filename |
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369 | ; output : IF CARRY=0 EAX = sector where th file is found |
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370 | ; EBX = pointer in buffer |
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371 | ; [buffer .. buffer+511] |
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372 | ; ECX,EDX,ESI,EDI not changed |
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373 | ; IF CARRY=1 filename not found |
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374 | ; Note : if cluster=0 it's changed to read rootdir |
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375 | ; save 2 previous directory sectors in longname_sec |
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376 | ;----------------------------------------------------------- |
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377 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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378 | mov [longname_sec1],0 |
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379 | mov [longname_sec2],0 |
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380 | |||
381 | adr_new_cluster: |
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382 | mov [cluster_tmp],eax |
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383 | mov [fat16_root],0 |
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384 | cmp eax,[LAST_CLUSTER] |
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385 | ja adr_not_found ; too big cluster number, something is wrong |
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386 | cmp eax,2 |
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387 | jnb adr_data_cluster |
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388 | |||
389 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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390 | cmp [fat_type],16 |
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391 | jne adr_data_cluster |
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392 | mov eax,[ROOT_START] |
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393 | mov edx,[ROOT_SECTORS] |
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394 | mov [fat16_root],1 ; flag for fat16 rootdir |
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395 | jmp adr_new_sector |
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396 | |||
397 | adr_data_cluster: |
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398 | sub eax,2 |
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399 | mov edx,[SECTORS_PER_CLUSTER] |
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400 | imul eax,edx |
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401 | add eax,[DATA_START] |
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402 | |||
403 | adr_new_sector: |
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404 | mov ebx,buffer |
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405 | call hd_read |
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406 | cmp [hd_error],0 |
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407 | jne adr_not_found |
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408 | |||
409 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
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410 | |||
411 | adr_analyze: |
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412 | mov edi,[ebx+11] ; file attribute |
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413 | and edi,0xf |
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414 | cmp edi,0xf |
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415 | je adr_long_filename |
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416 | test edi,0x8 ; skip over volume label |
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417 | jne adr_long_filename ; Note: label can be same name as file/dir |
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418 | |||
419 | mov esi,[esp+0] ; filename need to be uppercase |
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420 | mov edi,ebx |
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421 | push ecx |
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422 | mov ecx,11 |
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423 | cld |
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424 | rep cmpsb ; compare 8+3 filename |
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425 | pop ecx |
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426 | je adr_found |
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427 | |||
428 | adr_long_filename: |
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429 | add ebx,32 ; position of next dir entry |
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430 | dec ecx |
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431 | jnz adr_analyze |
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432 | |||
433 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
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434 | mov [longname_sec1],eax ; for delete long filename |
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435 | mov [longname_sec2],ecx |
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436 | inc eax ; next sector |
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437 | dec edx |
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438 | jne adr_new_sector |
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439 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
440 | je adr_not_found |
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441 | |||
442 | adr_next_cluster: |
||
443 | mov eax,[cluster_tmp] |
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444 | call get_FAT ; get next cluster |
||
445 | cmp [hd_error],0 |
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446 | jne adr_not_found |
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447 | |||
448 | cmp eax,2 ; incorrect fat chain? |
||
449 | jb adr_not_found ; yes |
||
450 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
451 | jb adr_new_cluster ; no. analyse it |
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452 | |||
453 | adr_not_found: |
||
454 | pop edi edi esi edx ecx ; first edi will remove ebx |
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455 | stc ; file not found |
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456 | ret |
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457 | |||
458 | adr_found: |
||
459 | pop edi edi esi edx ecx ; first edi will remove ebx |
||
460 | clc ; file found |
||
461 | ret |
||
462 | |||
463 | |||
464 | analyze_directory_to_write: |
||
465 | ;----------------------------------------------------------- |
||
466 | ; input : EAX = first cluster of the directory |
||
467 | ; output : IF CARRY=0 EAX = sector where the empty pos is found |
||
468 | ; EBX = pointer in buffer |
||
469 | ; [buffer .. buffer+511] |
||
470 | ; ECX,EDX,ESI,EDI not changed |
||
471 | ; IF CARRY=1 disk full or fat corrupted |
||
472 | ; Note : if cluster=0 it's changed to read rootdir |
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473 | ;----------------------------------------------------------- |
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474 | push ecx edx edi |
||
475 | |||
476 | adw_new_cluster: |
||
477 | mov [cluster_tmp],eax |
||
478 | mov [fat16_root],0 |
||
479 | cmp eax,[LAST_CLUSTER] |
||
480 | ja adw_not_found ; too big cluster number, something is wrong |
||
481 | cmp eax,2 |
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482 | jnb adw_data_cluster |
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483 | |||
484 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
485 | cmp [fat_type],16 |
||
486 | jne adw_data_cluster |
||
487 | mov eax,[ROOT_START] |
||
488 | mov edx,[ROOT_SECTORS] |
||
489 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
490 | jmp adw_new_sector |
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491 | |||
492 | adw_data_cluster: |
||
493 | sub eax,2 |
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494 | mov edx,[SECTORS_PER_CLUSTER] |
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495 | imul eax,edx |
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496 | add eax,[DATA_START] |
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497 | |||
498 | adw_new_sector: |
||
499 | mov ebx,buffer |
||
500 | call hd_read |
||
501 | cmp [hd_error],0 |
||
502 | jne adw_not_found |
||
503 | |||
504 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
||
505 | |||
506 | adw_analyze: |
||
507 | cmp byte [ebx],0x00 ; is free entry? |
||
508 | je adw_found ; yes |
||
509 | cmp byte [ebx],0xe5 ; is deleted entry? |
||
510 | je adw_found ; yes |
||
511 | add ebx,32 ; position of next dir entry |
||
512 | dec ecx |
||
513 | jnz adw_analyze |
||
514 | |||
515 | inc eax ; next sector |
||
516 | dec edx |
||
517 | jne adw_new_sector |
||
518 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
519 | je adw_not_found |
||
520 | |||
521 | mov eax,[cluster_tmp] |
||
522 | call get_FAT ; get next cluster |
||
523 | cmp [hd_error],0 |
||
524 | jne adw_not_found |
||
525 | |||
526 | cmp eax,2 ; incorrect fat chain? |
||
527 | jb adw_not_found ; yes |
||
528 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
529 | jb adw_new_cluster ; no. analyse it |
||
530 | |||
531 | mov eax,2 ; this block of code add a new cluster |
||
532 | call get_free_FAT ; for the directory because the directory |
||
533 | jc adw_not_found ; is full |
||
534 | |||
535 | mov edx,[fatEND] ; new end for directory |
||
536 | call set_FAT |
||
537 | cmp [hd_error],0 |
||
538 | jne adw_not_found |
||
539 | |||
540 | push eax ; save new cluster |
||
541 | mov edx,eax |
||
542 | mov eax,[cluster_tmp] ; change last cluster to point new cluster |
||
543 | call set_FAT |
||
544 | cmp [hd_error],0 |
||
545 | jne adw_not_found_1 |
||
546 | |||
547 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
548 | call add_disk_free_space |
||
549 | cmp [hd_error],0 |
||
550 | jne adw_not_found_1 |
||
551 | |||
552 | mov ecx,512/4 |
||
553 | xor eax,eax |
||
554 | mov edi,buffer |
||
555 | cld |
||
556 | rep stosd ; clear new directory cluster |
||
557 | pop eax |
||
558 | |||
559 | sub eax,2 |
||
560 | mov ecx,[SECTORS_PER_CLUSTER] |
||
561 | imul eax,ecx |
||
562 | add eax,[DATA_START] |
||
563 | mov ebx,buffer |
||
564 | push eax ; save sector number |
||
565 | |||
566 | adw_set_empty_directory: |
||
567 | call hd_write |
||
568 | cmp [hd_error],0 |
||
569 | jne adw_not_found_1 |
||
570 | |||
571 | inc eax ; next sector |
||
572 | dec ecx |
||
573 | jnz adw_set_empty_directory |
||
574 | |||
575 | pop eax |
||
576 | |||
577 | adw_found: |
||
578 | pop edi edx ecx |
||
579 | clc ; free space found |
||
580 | ret |
||
581 | adw_not_found_1: |
||
582 | add esp,4 |
||
583 | adw_not_found: |
||
584 | pop edi edx ecx |
||
585 | stc ; free space not found |
||
586 | ret |
||
587 | |||
588 | |||
589 | get_data_cluster: |
||
590 | ;----------------------------------------------------------- |
||
591 | ; input : EAX = cluster |
||
592 | ; EBX = pointer to buffer |
||
593 | ; EDX = # blocks to read in buffer |
||
594 | ; ESI = # blocks to skip over |
||
595 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
596 | ; if CARRY=1 cluster out of range |
||
597 | ; Note : if cluster=0 it's changed to read rootdir |
||
598 | ;----------------------------------------------------------- |
||
599 | push eax ecx |
||
600 | |||
601 | mov [fat16_root],0 |
||
602 | cmp eax,[LAST_CLUSTER] |
||
603 | ja gdc_error ; too big cluster number, something is wrong |
||
604 | cmp eax,2 |
||
605 | jnb gdc_cluster |
||
606 | |||
607 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
608 | cmp [fat_type],16 |
||
609 | jne gdc_cluster |
||
610 | mov eax,[ROOT_START] |
||
611 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
612 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
613 | jmp gdc_read |
||
614 | |||
615 | gdc_cluster: |
||
616 | sub eax,2 |
||
617 | mov ecx,[SECTORS_PER_CLUSTER] |
||
618 | imul eax,ecx |
||
619 | add eax,[DATA_START] |
||
620 | |||
621 | gdc_read: |
||
622 | test esi,esi ; first wanted block |
||
623 | je gdcl1 ; yes, skip count is 0 |
||
624 | dec esi |
||
625 | jmp gdcl2 |
||
626 | |||
627 | gdcl1: |
||
628 | call hd_read |
||
629 | cmp [hd_error],0 |
||
630 | jne gdc_error |
||
631 | |||
632 | add ebx,512 ; update pointer |
||
633 | dec edx |
||
634 | |||
635 | gdcl2: |
||
636 | test edx,edx ; is all read? |
||
637 | je out_of_read |
||
638 | |||
639 | inc eax ; next sector |
||
640 | dec ecx |
||
641 | jnz gdc_read |
||
642 | |||
643 | out_of_read: |
||
644 | pop ecx eax |
||
645 | clc |
||
646 | ret |
||
647 | |||
648 | gdc_error: |
||
649 | pop ecx eax |
||
650 | stc |
||
651 | ret |
||
652 | |||
653 | |||
654 | set_data_cluster: |
||
655 | ;----------------------------------------------------------- |
||
656 | ; input : EAX = cluster |
||
657 | ; EBX = pointer to buffer |
||
658 | ; output : if CARRY=0 ok |
||
659 | ; if CARRY=1 cluster out of range |
||
660 | ;----------------------------------------------------------- |
||
661 | push eax ebx edx |
||
662 | |||
663 | cmp eax,[LAST_CLUSTER] |
||
664 | ja sdc_error ; too big cluster number, something is wrong |
||
665 | sub eax,2 |
||
666 | jb sdc_error ; don't allow rootdir write |
||
667 | |||
668 | mov edx,[SECTORS_PER_CLUSTER] |
||
669 | imul eax,edx |
||
670 | add eax,[DATA_START] |
||
671 | |||
672 | sdc_write: |
||
673 | call hd_write |
||
674 | cmp [hd_error],0 |
||
675 | jne sdc_error |
||
676 | |||
677 | add ebx,512 ; update pointer |
||
678 | inc eax |
||
679 | dec edx |
||
680 | jnz sdc_write |
||
681 | pop edx ebx eax |
||
682 | clc |
||
683 | ret |
||
684 | |||
685 | sdc_error: |
||
686 | pop edx ebx eax |
||
687 | stc |
||
688 | ret |
||
689 | |||
690 | |||
691 | get_cluster_of_a_path: |
||
692 | ;--------------------------------------------------------- |
||
693 | ; input : EBX = pointer to a path string |
||
694 | ; (example: the path "/files/data/document" become |
||
695 | ; "files......data.......document...0" |
||
696 | ; '.' = space char |
||
697 | ; '0' = char(0) (ASCII=0) !!! ) |
||
698 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
699 | ; if (CARRY=0) -> EAX=cluster |
||
700 | ;--------------------------------------------------------- |
||
701 | push ebx edx |
||
702 | |||
703 | mov eax,[ROOT_CLUSTER] |
||
704 | mov edx,ebx |
||
705 | |||
706 | search_end_of_path: |
||
707 | cmp byte [edx],0 |
||
708 | je found_end_of_path |
||
709 | |||
710 | inc edx ; '/' |
||
711 | mov ebx,edx |
||
712 | call analyze_directory |
||
713 | jc directory_not_found |
||
714 | |||
715 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
716 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
717 | and eax,[fatMASK] |
||
718 | add edx,11 ; 8+3 (name+extension) |
||
719 | jmp search_end_of_path |
||
720 | |||
721 | found_end_of_path: |
||
722 | pop edx ebx |
||
723 | clc ; no errors |
||
724 | ret |
||
725 | |||
726 | directory_not_found: |
||
727 | pop edx ebx |
||
728 | stc ; errors occour |
||
729 | ret |
||
730 | |||
731 | |||
732 | bcd2bin: |
||
733 | ;---------------------------------- |
||
734 | ; input : AL=BCD number (eg. 0x11) |
||
735 | ; output : AH=0 |
||
736 | ; AL=decimal number (eg. 11) |
||
737 | ;---------------------------------- |
||
738 | xor ah,ah |
||
739 | shl ax,4 |
||
740 | shr al,4 |
||
741 | aad |
||
742 | ret |
||
743 | |||
744 | |||
745 | get_date_for_file: |
||
746 | ;----------------------------------------------------- |
||
747 | ; Get date from CMOS and pack day,month,year in AX |
||
748 | ; DATE bits 0..4 : day of month 0..31 |
||
749 | ; 5..8 : month of year 1..12 |
||
750 | ; 9..15 : count of years from 1980 |
||
751 | ;----------------------------------------------------- |
||
752 | mov al,0x7 ;day |
||
753 | out 0x70,al |
||
754 | in al,0x71 |
||
755 | call bcd2bin |
||
756 | ror eax,5 |
||
757 | |||
758 | mov al,0x8 ;month |
||
759 | out 0x70,al |
||
760 | in al,0x71 |
||
761 | call bcd2bin |
||
762 | ror eax,4 |
||
763 | |||
764 | mov al,0x9 ;year |
||
765 | out 0x70,al |
||
766 | in al,0x71 |
||
767 | call bcd2bin |
||
768 | add ax,20 ;because CMOS return only the two last |
||
769 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
770 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
771 | ret |
||
772 | |||
773 | |||
774 | get_time_for_file: |
||
775 | ;----------------------------------------------------- |
||
776 | ; Get time from CMOS and pack hour,minute,second in AX |
||
777 | ; TIME bits 0..4 : second (the low bit is lost) |
||
778 | ; 5..10 : minute 0..59 |
||
779 | ; 11..15 : hour 0..23 |
||
780 | ;----------------------------------------------------- |
||
781 | mov al,0x0 ;second |
||
782 | out 0x70,al |
||
783 | in al,0x71 |
||
784 | call bcd2bin |
||
785 | ror eax,6 |
||
786 | |||
787 | mov al,0x2 ;minute |
||
788 | out 0x70,al |
||
789 | in al,0x71 |
||
790 | call bcd2bin |
||
791 | ror eax,6 |
||
792 | |||
793 | mov al,0x4 ;hour |
||
794 | out 0x70,al |
||
795 | in al,0x71 |
||
796 | call bcd2bin |
||
797 | rol eax,11 |
||
798 | ret |
||
799 | |||
800 | |||
801 | set_current_time_for_entry: |
||
802 | ;----------------------------------------------------- |
||
803 | ; Set current time/date for file entry |
||
804 | ; input : ebx = file entry pointer |
||
805 | ;----------------------------------------------------- |
||
806 | push eax |
||
807 | call get_time_for_file ; update files date/time |
||
808 | mov [ebx+22],ax |
||
809 | call get_date_for_file |
||
810 | mov [ebx+24],ax |
||
811 | pop eax |
||
812 | ret |
||
813 | |||
814 | |||
815 | makedir: |
||
816 | ;----------------------------------------------------- |
||
817 | ; input : eax = directory name |
||
818 | ; edx = path |
||
819 | ; output : eax = 0 - ok |
||
820 | ; 3 - unknown FS |
||
821 | ; 5 - file not found |
||
822 | ; 8 - disk full |
||
823 | ; 10 - access denied |
||
824 | ; Note : can only make one directory at time |
||
825 | ;----------------------------------------------------- |
||
826 | cmp [fat_type],0 |
||
827 | jnz make_dir_fat_ok |
||
828 | mov eax,ERROR_UNKNOWN_FS |
||
829 | ret |
||
830 | |||
831 | make_dir_fat_ok: |
||
832 | ; call reserve_hd1 |
||
833 | |||
834 | pushad |
||
835 | |||
836 | mov ebx,edx |
||
837 | call get_cluster_of_a_path |
||
838 | jnc make_dir_found_path |
||
839 | cmp [hd_error],0 |
||
840 | jne make_dir_error_1 |
||
841 | |||
842 | make_dir_path_not_found: |
||
843 | popad |
||
844 | call update_disk ; write all of cache and fat to hd |
||
845 | cmp [hd_error],0 |
||
846 | jne make_dir_error_2 |
||
847 | |||
848 | mov [hd1_status],0 |
||
849 | mov eax,ERROR_FILE_NOT_FOUND |
||
850 | ret |
||
851 | |||
852 | make_dir_disk_full: |
||
853 | cmp [hd_error],0 |
||
854 | jne make_dir_error_1 |
||
855 | popad |
||
856 | call update_disk ; write all of cache and fat to hd |
||
857 | cmp [hd_error],0 |
||
858 | jne make_dir_error_2 |
||
859 | |||
860 | mov [hd1_status],0 |
||
861 | mov eax,ERROR_DISK_FULL |
||
862 | ret |
||
863 | |||
864 | make_dir_already_exist: |
||
865 | cmp [hd_error],0 |
||
866 | jne make_dir_error_1 |
||
867 | mov eax,[cluster] ; directory cluster |
||
868 | xor edx,edx ; free |
||
869 | call set_FAT |
||
870 | cmp [hd_error],0 |
||
871 | jne make_dir_error_1 |
||
872 | |||
873 | popad |
||
874 | call update_disk ; write all of cache and fat to hd |
||
875 | make_dir_error_2: |
||
876 | mov [hd1_status],0 |
||
877 | mov eax,ERROR_ACCESS_DENIED |
||
878 | ret |
||
879 | |||
880 | make_dir_error_1: |
||
881 | popad |
||
882 | jmp make_dir_error_2 |
||
883 | |||
884 | make_dir_error_3: |
||
885 | add esp,4 |
||
886 | jmp make_dir_error_1 |
||
887 | |||
888 | make_dir_found_path: |
||
889 | cmp eax,[ROOT_CLUSTER] |
||
890 | jnz make_dir_not_root |
||
891 | xor eax,eax |
||
892 | |||
893 | make_dir_not_root: |
||
894 | mov ecx,eax ; directorys start cluster |
||
895 | mov word [NewDirEntry2+26],cx ; 16 bits low of cluster |
||
896 | shr ecx,16 |
||
897 | mov word [NewDirEntry2+20],cx ; 16 bits high of cluster (=0 fat16) |
||
898 | |||
899 | push eax ; save parent directory cluster |
||
900 | mov eax,2 |
||
901 | call get_free_FAT |
||
902 | mov [cluster],eax ; first free cluster |
||
903 | pop eax |
||
904 | jc make_dir_disk_full |
||
905 | |||
906 | push eax |
||
907 | mov eax,[cluster] ; directory cluster |
||
908 | mov edx,[fatEND] ; end for directory |
||
909 | call set_FAT |
||
910 | cmp [hd_error],0 |
||
911 | jne make_dir_error_3 |
||
912 | pop eax |
||
913 | |||
914 | mov ebx,PUSHAD_EAX ; dir name |
||
915 | push eax |
||
916 | call analyze_directory ; check if directory already exist |
||
917 | cmp [hd_error],0 |
||
918 | jne make_dir_error_1 |
||
919 | |||
920 | pop eax |
||
921 | jnc make_dir_already_exist ; need to free allocated cluster! |
||
922 | |||
923 | call analyze_directory_to_write |
||
924 | jc make_dir_already_exist ; need to free allocated cluster! |
||
925 | |||
926 | mov esi,PUSHAD_EAX ; dir name |
||
927 | mov edi,ebx ; pointer in buffer |
||
928 | mov ecx,11 |
||
929 | cld |
||
930 | rep movsb |
||
931 | |||
932 | mov dword [ebx+28],0 ; dir size is always 0 |
||
933 | mov ecx,[cluster] |
||
934 | mov [ebx+26],cx ; 16 bits low of cluster |
||
935 | mov word [NewDirEntry1+26],cx |
||
936 | shr ecx,16 |
||
937 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
938 | mov word [NewDirEntry1+20],cx |
||
939 | mov byte [ebx+11],0x10 ; attribute = directory |
||
940 | |||
941 | call set_current_time_for_entry |
||
942 | mov ecx,[ebx+22] |
||
943 | mov dword [NewDirEntry1+22],ecx |
||
944 | mov dword [NewDirEntry2+22],ecx |
||
945 | |||
946 | mov ebx,buffer ; save the directory name,length,cluster |
||
947 | call hd_write |
||
948 | cmp [hd_error],0 |
||
949 | jne make_dir_error_1 |
||
950 | |||
951 | mov ecx,512/4 |
||
952 | xor eax,eax |
||
953 | mov edi,buffer |
||
954 | cld |
||
955 | rep stosd ; clear new directory cluster |
||
956 | |||
957 | mov eax,[cluster] ; new directory cluster |
||
958 | sub eax,2 |
||
959 | mov edx,[SECTORS_PER_CLUSTER] |
||
960 | imul eax,edx |
||
961 | add eax,[DATA_START] |
||
962 | mov ebx,buffer |
||
963 | add eax,edx ; start from last sector |
||
964 | |||
965 | dir_set_empty_directory: |
||
966 | dec eax ; next sector |
||
967 | cmp edx,1 ; is first directory sector? |
||
968 | jnz not_first_sector ; no. write empty sector |
||
969 | mov esi,NewDirEntry1 |
||
970 | mov edi,buffer |
||
971 | mov ecx,64/4 |
||
972 | cld |
||
973 | rep movsd ; copy 2 first directory entrys "." and ".." |
||
974 | |||
975 | not_first_sector: |
||
976 | call hd_write |
||
977 | cmp [hd_error],0 |
||
978 | jne make_dir_error_1 |
||
979 | |||
980 | dec edx |
||
981 | jnz dir_set_empty_directory |
||
982 | |||
983 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
984 | call add_disk_free_space |
||
985 | cmp [hd_error],0 |
||
986 | jne make_dir_error_1 |
||
987 | |||
988 | popad |
||
989 | call update_disk ; write all of cache and fat to hd |
||
990 | cmp [hd_error],0 |
||
991 | jne make_dir_error_2 |
||
992 | mov [hd1_status],0 |
||
993 | xor eax,eax |
||
994 | ret |
||
995 | |||
996 | |||
997 | removedir: |
||
998 | ;----------------------------------------------------- |
||
999 | ; input : eax = file/directory name |
||
1000 | ; edx = path |
||
1001 | ; output : eax = 0 - ok |
||
1002 | ; 3 - unknown FS |
||
1003 | ; 5 - file not found |
||
1004 | ; 10 - access denied |
||
1005 | ;----------------------------------------------------- |
||
1006 | cmp [fat_type],0 |
||
1007 | jnz remove_dir_fat_ok |
||
1008 | mov eax,ERROR_UNKNOWN_FS |
||
1009 | ret |
||
1010 | |||
1011 | remove_dir_fat_ok: |
||
1012 | ; call reserve_hd1 |
||
1013 | |||
1014 | push edi |
||
1015 | mov edi,1 ; allow directory remove |
||
1016 | call file_delete |
||
1017 | cmp [hd_error],0 |
||
1018 | jne @f |
||
1019 | |||
1020 | pop edi |
||
1021 | |||
1022 | call update_disk ; write all of cache and fat to hd |
||
1023 | @@: |
||
1024 | mov [hd1_status],0 |
||
1025 | ret |
||
1026 | |||
1027 | |||
1028 | add_disk_free_space: |
||
1029 | ;----------------------------------------------------- |
||
1030 | ; input : ecx = cluster count |
||
1031 | ; Note : negative = remove clusters from free space |
||
1032 | ; positive = add clusters to free space |
||
1033 | ;----------------------------------------------------- |
||
1034 | test ecx,ecx ; no change |
||
1035 | je add_dfs_no |
||
1036 | cmp [fat_type],32 ; free disk space only used by fat32 |
||
1037 | jne add_dfs_no |
||
1038 | |||
1039 | push eax ebx |
||
1040 | mov eax,[ADR_FSINFO] |
||
133 | diamond | 1041 | mov ebx,fsinfo_buffer |
129 | mikedld | 1042 | call hd_read |
1043 | cmp [hd_error],0 |
||
1044 | jne add_not_fs |
||
1045 | |||
1046 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
||
1047 | jne add_not_fs |
||
1048 | |||
1049 | add [ebx+0x1e8],ecx |
||
1050 | call hd_write |
||
133 | diamond | 1051 | ; cmp [hd_error],0 |
1052 | ; jne add_not_fs |
||
129 | mikedld | 1053 | |
1054 | add_not_fs: |
||
1055 | pop ebx eax |
||
1056 | |||
1057 | add_dfs_no: |
||
1058 | ret |
||
1059 | |||
1060 | |||
1061 | file_write: |
||
1062 | ;-------------------------------------------------------------------------- |
||
1063 | ; INPUT : user-reg register-in-this meaning symbol-in-this-routine |
||
1064 | ; |
||
1065 | ; EAX EDI system call to write / |
||
1066 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1067 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1068 | ; ECX EBX (PAR2) file size PAR2 |
||
1069 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1070 | ; |
||
1071 | ; output : eax = 0 - ok |
||
1072 | ; 3 - unknown FS |
||
1073 | ; 5 - file not found |
||
1074 | ; 8 - disk full |
||
1075 | ; 10 - access denied |
||
1076 | ;-------------------------------------------------------------------------- |
||
1077 | cmp [fat_type],0 |
||
1078 | jnz fat_ok_for_writing |
||
1079 | mov eax,ERROR_UNKNOWN_FS |
||
1080 | ret |
||
1081 | |||
1082 | fat_ok_for_writing: |
||
1083 | ; call reserve_hd1 |
||
1084 | |||
1085 | pushad |
||
1086 | |||
1087 | xor edi,edi ; don't allow directory remove |
||
1088 | call file_delete ; try to delete the file first |
||
1089 | cmp [hd_error],0 |
||
1090 | jne exit_write_access_1 |
||
1091 | |||
1092 | test eax,eax |
||
1093 | jz old_deleted ; deleted ok |
||
1094 | cmp eax,ERROR_FILE_NOT_FOUND |
||
1095 | jnz exit_write_access ; it exist but can't delete |
||
1096 | |||
1097 | old_deleted: |
||
1098 | mov ebx,PUSHAD_EDX |
||
1099 | call get_cluster_of_a_path |
||
1100 | jnc found_directory_for_writing |
||
1101 | cmp [hd_error],0 |
||
1102 | jne exit_write_access |
||
1103 | |||
1104 | exit_writing_with_error: |
||
1105 | popad |
||
1106 | call update_disk ; write all of cache and fat to hd |
||
1107 | cmp [hd_error],0 |
||
1108 | jne exit_write_access_2 |
||
1109 | |||
1110 | mov [hd1_status],0 |
||
1111 | mov eax,ERROR_FILE_NOT_FOUND |
||
1112 | ret |
||
1113 | |||
1114 | exit_writing_disk_full_clear: |
||
1115 | cmp [hd_error],0 |
||
1116 | jne exit_write_access_1 |
||
1117 | mov eax,[sector_tmp] |
||
1118 | mov ebx,buffer |
||
1119 | call hd_read ; read directory sector |
||
1120 | cmp [hd_error],0 |
||
1121 | jne exit_write_access_1 |
||
1122 | |||
1123 | mov edx,[entry_pos] |
||
1124 | mov byte [edx],0xe5 ; mark as deleted |
||
1125 | call hd_write |
||
1126 | cmp [hd_error],0 |
||
1127 | jne exit_write_access_1 |
||
1128 | |||
1129 | mov eax,[edx+20-2] ; FAT entry |
||
1130 | mov ax,[edx+26] |
||
1131 | and eax,[fatMASK] |
||
1132 | call clear_cluster_chain |
||
1133 | |||
1134 | exit_writing_disk_full: |
||
1135 | cmp [hd_error],0 |
||
1136 | jne exit_write_access_1 |
||
1137 | popad |
||
1138 | call update_disk ; write all of cache and fat to hd |
||
1139 | cmp [hd_error],0 |
||
1140 | jne exit_write_access_2 |
||
1141 | mov [hd1_status],0 |
||
1142 | mov eax,ERROR_DISK_FULL |
||
1143 | ret |
||
1144 | |||
1145 | exit_write_access: |
||
1146 | popad |
||
1147 | call update_disk ; write all of cache and fat to hd |
||
1148 | mov [hd1_status],0 |
||
1149 | mov eax,ERROR_ACCESS_DENIED |
||
1150 | ret |
||
1151 | |||
1152 | exit_write_access_1: |
||
1153 | popad |
||
1154 | exit_write_access_2: |
||
1155 | mov [hd1_status],0 |
||
1156 | mov eax,ERROR_ACCESS_DENIED |
||
1157 | ret |
||
1158 | |||
1159 | found_directory_for_writing: |
||
1160 | call analyze_directory_to_write |
||
1161 | jc exit_writing_disk_full |
||
1162 | |||
1163 | mov [sector_tmp],eax |
||
1164 | mov [entry_pos],ebx |
||
1165 | push eax ; save directory sector |
||
1166 | mov eax,2 |
||
1167 | call get_free_FAT |
||
1168 | mov [cluster],eax ; first free cluster |
||
1169 | pop eax |
||
1170 | jc exit_writing_disk_full |
||
1171 | |||
1172 | mov esi,PUSHAD_EAX ; file name |
||
1173 | mov edi,ebx ; pointer in buffer |
||
1174 | mov ecx,11 |
||
1175 | cld |
||
1176 | rep movsb |
||
1177 | |||
1178 | mov esi,PUSHAD_EBX ; file size (bytes left) |
||
1179 | mov [ebx+28],esi ; file size |
||
1180 | mov ecx,[cluster] |
||
1181 | mov [ebx+26],cx ; 16 bits low of cluster |
||
1182 | shr ecx,16 |
||
1183 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
1184 | mov byte [ebx+11],0x20 ; attribute = archive |
||
1185 | |||
1186 | call set_current_time_for_entry |
||
1187 | |||
1188 | mov ebx,buffer ; save the directory name,length,cluster |
||
1189 | call hd_write |
||
1190 | cmp [hd_error],0 |
||
1191 | jne exit_write_access_1 |
||
1192 | |||
1193 | imul edi,[SECTORS_PER_CLUSTER],512 ; edi = cluster size in bytes |
||
1194 | xor ecx,ecx ; cluster count |
||
1195 | mov ebx,PUSHAD_ECX ; ebx = buffer |
||
1196 | |||
1197 | hd_new_block_write: |
||
1198 | |||
1199 | mov eax,[cluster] ; eax = block |
||
1200 | call set_data_cluster |
||
1201 | cmp [hd_error],0 |
||
1202 | jne exit_write_access_1 |
||
1203 | |||
1204 | sub esi,edi ; sub wrote bytes |
||
1205 | jbe file_saved_OK ; end if all done |
||
1206 | add ebx,edi ; update buffer position |
||
1207 | |||
1208 | inc eax |
||
1209 | call get_free_FAT ; next free in FAT |
||
1210 | jc exit_writing_disk_full_clear |
||
1211 | |||
1212 | mov edx,eax |
||
1213 | xchg eax,[cluster] ; get old cluster and save new cluster |
||
1214 | call set_FAT ; add it in cluster chain |
||
1215 | cmp [hd_error],0 |
||
1216 | jne exit_write_access_1 |
||
1217 | |||
1218 | dec ecx ; update cluster count |
||
1219 | jmp hd_new_block_write |
||
1220 | |||
1221 | file_saved_OK: |
||
1222 | |||
1223 | mov edx,[fatEND] ; new end for cluster chain |
||
1224 | call set_FAT |
||
1225 | cmp [hd_error],0 |
||
1226 | jne exit_write_access_1 |
||
1227 | |||
1228 | dec ecx ; update cluster count |
||
1229 | |||
1230 | call add_disk_free_space ; remove clusters from free disk space |
||
1231 | cmp [hd_error],0 |
||
1232 | jne exit_write_access_1 |
||
1233 | |||
1234 | popad |
||
1235 | call update_disk ; write all of cache and fat to hd |
||
1236 | cmp [hd_error],0 |
||
1237 | jne exit_write_access_2 |
||
1238 | mov [hd1_status],0 |
||
1239 | xor eax,eax |
||
1240 | ret |
||
1241 | |||
1242 | |||
1243 | file_read: |
||
1244 | ;-------------------------------------------------------------------------- |
||
1245 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
1246 | ; |
||
1247 | ; EAX EDI system call to write / |
||
1248 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1249 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1250 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
1251 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1252 | ; EDI ESI vt first 512 block to read |
||
1253 | ; EDI if 0 - read root |
||
1254 | ; |
||
1255 | ; output : eax = 0 - ok |
||
1256 | ; 3 - unknown FS |
||
1257 | ; 5 - file not found |
||
1258 | ; 6 - end of file |
||
1259 | ; 9 - fat table corrupted |
||
1260 | ; 10 - access denied |
||
1261 | ; ebx = size of file/directory |
||
1262 | ;-------------------------------------------------------------------------- |
||
1263 | cmp [fat_type],0 |
||
1264 | jnz fat_ok_for_reading |
||
1265 | xor ebx,ebx |
||
1266 | mov eax,ERROR_UNKNOWN_FS |
||
1267 | mov [hd1_status], ebx |
||
1268 | ret |
||
1269 | |||
1270 | fat_ok_for_reading: |
||
1271 | ; call reserve_hd1 |
||
1272 | |||
1273 | pushad |
||
1274 | |||
1275 | mov ebx,edx |
||
1276 | call get_cluster_of_a_path |
||
1277 | jc file_to_read_not_found |
||
1278 | |||
1279 | test edi,edi ; read rootdir |
||
1280 | jne no_read_root |
||
1281 | |||
1282 | xor eax,eax |
||
1283 | call get_dir_size ; return rootdir size |
||
1284 | cmp [hd_error],0 |
||
1285 | jne file_access_denied |
||
1286 | |||
1287 | mov [file_size],eax |
||
1288 | mov eax,[ROOT_CLUSTER] |
||
1289 | jmp file_read_start |
||
1290 | |||
1291 | no_read_root: |
||
1292 | mov ebx,PUSHAD_EAX ; file name |
||
1293 | call analyze_directory |
||
1294 | jc file_to_read_not_found |
||
1295 | |||
1296 | mov eax,[ebx+28] ; file size |
||
1297 | test byte [ebx+11],0x10 ; is it directory? |
||
1298 | jz read_set_size ; no |
||
1299 | |||
1300 | mov eax,[ebx+20-2] ; FAT entry |
||
1301 | mov ax,[ebx+26] |
||
1302 | and eax,[fatMASK] |
||
1303 | call get_dir_size |
||
1304 | cmp [hd_error],0 |
||
1305 | jne file_access_denied |
||
1306 | |||
1307 | read_set_size: |
||
1308 | mov [file_size],eax |
||
1309 | |||
1310 | mov eax,[ebx+20-2] ; FAT entry |
||
1311 | mov ax,[ebx+26] |
||
1312 | and eax,[fatMASK] |
||
1313 | |||
1314 | file_read_start: |
||
1315 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
1316 | mov edx,PUSHAD_EBX ; file blocks to read |
||
1317 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
1318 | |||
1319 | file_read_new_cluster: |
||
1320 | call get_data_cluster |
||
1321 | jc file_read_eof ; end of file or cluster out of range |
||
1322 | |||
1323 | test edx,edx ; is all read? |
||
1324 | je file_read_OK ; yes |
||
1325 | |||
1326 | call get_FAT ; get next cluster |
||
1327 | cmp [hd_error],0 |
||
1328 | jne file_access_denied |
||
1329 | |||
1330 | cmp eax,[fatRESERVED] ; end of file |
||
1331 | jnb file_read_eof |
||
1332 | cmp eax,2 ; incorrect fat chain |
||
1333 | jnb file_read_new_cluster |
||
1334 | |||
1335 | popad |
||
1336 | mov [hd1_status],0 |
||
1337 | mov ebx,[file_size] |
||
1338 | mov eax,ERROR_FAT_TABLE |
||
1339 | ret |
||
1340 | |||
1341 | file_read_eof: |
||
1342 | cmp [hd_error],0 |
||
1343 | jne file_access_denied |
||
1344 | popad |
||
1345 | mov [hd1_status],0 |
||
1346 | mov ebx,[file_size] |
||
1347 | mov eax,ERROR_END_OF_FILE |
||
1348 | ret |
||
1349 | |||
1350 | file_read_OK: |
||
1351 | popad |
||
1352 | mov [hd1_status],0 |
||
1353 | mov ebx,[file_size] |
||
1354 | xor eax,eax |
||
1355 | ret |
||
1356 | |||
1357 | file_to_read_not_found: |
||
1358 | cmp [hd_error],0 |
||
1359 | jne file_access_denied |
||
1360 | popad |
||
1361 | mov [hd1_status],0 |
||
1362 | xor ebx,ebx |
||
1363 | mov eax,ERROR_FILE_NOT_FOUND |
||
1364 | ret |
||
1365 | |||
1366 | file_access_denied: |
||
1367 | popad |
||
1368 | mov [hd1_status],0 |
||
1369 | xor ebx,ebx |
||
1370 | mov eax,ERROR_ACCESS_DENIED |
||
1371 | ret |
||
1372 | |||
1373 | get_dir_size: |
||
1374 | ;----------------------------------------------------- |
||
1375 | ; input : eax = first cluster (0=rootdir) |
||
1376 | ; output : eax = directory size in bytes |
||
1377 | ;----------------------------------------------------- |
||
1378 | push edx |
||
1379 | xor edx,edx ; count of directory clusters |
||
1380 | test eax,eax |
||
1381 | jnz dir_size_next |
||
1382 | |||
1383 | mov eax,[ROOT_SECTORS] |
||
1384 | shl eax,9 ; fat16 rootdir size in bytes |
||
1385 | cmp [fat_type],16 |
||
1386 | je dir_size_ret |
||
1387 | mov eax,[ROOT_CLUSTER] |
||
1388 | |||
1389 | dir_size_next: |
||
1390 | cmp eax,2 ; incorrect fat chain |
||
1391 | jb dir_size_end |
||
1392 | cmp eax,[fatRESERVED] ; end of directory |
||
1393 | ja dir_size_end |
||
1394 | call get_FAT ; get next cluster |
||
1395 | cmp [hd_error],0 |
||
1396 | jne dir_size_ret |
||
1397 | |||
1398 | inc edx |
||
1399 | jmp dir_size_next |
||
1400 | |||
1401 | dir_size_end: |
||
1402 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1403 | imul eax,edx |
||
1404 | |||
1405 | dir_size_ret: |
||
1406 | pop edx |
||
1407 | ret |
||
1408 | |||
1409 | |||
1410 | file_delete: |
||
1411 | ;----------------------------------------------------- |
||
1412 | ; input : eax = file/directory name |
||
1413 | ; edx = path |
||
1414 | ; edi = 1 - allow directory remove else don't remove directory |
||
1415 | ; output : eax = 0 - ok |
||
1416 | ; 3 - unknown FS |
||
1417 | ; 5 - file not found |
||
1418 | ; 10 - access denied |
||
1419 | ;----------------------------------------------------- |
||
1420 | cmp [fat_type],0 |
||
1421 | jnz file_del_fat_ok |
||
1422 | mov eax,ERROR_UNKNOWN_FS |
||
1423 | ret |
||
1424 | |||
1425 | file_del_fat_ok: |
||
1426 | pushad |
||
1427 | |||
1428 | mov ebx,edx |
||
1429 | call get_cluster_of_a_path |
||
1430 | jc file_to_delete_not_found |
||
1431 | |||
1432 | mov ebx,PUSHAD_EAX ; file/directory name |
||
1433 | call analyze_directory |
||
1434 | jc file_to_delete_not_found |
||
1435 | |||
1436 | test byte [ebx+11],0x10 ; is it directory? |
||
1437 | jz delete_notdir ; no. it's file |
||
1438 | cmp edi,1 ; allow directory remove |
||
1439 | jnz delete_no_access ; no |
||
1440 | |||
1441 | push eax ; save directory sector |
||
1442 | mov eax,[ebx+20-2] ; first cluster of file |
||
1443 | mov ax,[ebx+26] ; 0 length files start cluster = 0 |
||
1444 | and eax,[fatMASK] |
||
1445 | xor ebp,ebp ; counter for directory deepnes |
||
1446 | call clear_directory |
||
1447 | pop eax |
||
1448 | jc delete_no_access |
||
1449 | |||
1450 | push ebx ; save directory pointer in buffer |
||
1451 | mov ebx,buffer |
||
1452 | call hd_read ; read directory sector |
||
1453 | cmp [hd_error],0 |
||
1454 | jne delete_no_access_1 |
||
1455 | pop ebx |
||
1456 | |||
1457 | delete_notdir: |
||
1458 | call delete_entry_name |
||
1459 | cmp [hd_error],0 |
||
1460 | jne delete_no_access |
||
1461 | |||
1462 | mov eax,ecx ; first cluster of file |
||
1463 | call clear_cluster_chain |
||
1464 | cmp [hd_error],0 |
||
1465 | jne delete_no_access |
||
1466 | |||
1467 | popad |
||
1468 | xor eax,eax |
||
1469 | ret |
||
1470 | |||
1471 | delete_no_access_1: |
||
1472 | add esp,4 |
||
1473 | delete_no_access: |
||
1474 | popad |
||
1475 | mov eax,ERROR_ACCESS_DENIED |
||
1476 | ret |
||
1477 | |||
1478 | file_to_delete_not_found: |
||
1479 | cmp [hd_error],0 |
||
1480 | jne delete_no_access |
||
1481 | popad |
||
1482 | mov eax,ERROR_FILE_NOT_FOUND |
||
1483 | ret |
||
1484 | |||
1485 | |||
1486 | clear_cluster_chain: |
||
1487 | ;----------------------------------------------------- |
||
1488 | ; input : eax = first cluster |
||
1489 | ;----------------------------------------------------- |
||
1490 | push eax ecx edx |
||
1491 | xor ecx,ecx ; cluster count |
||
1492 | |||
1493 | clean_new_chain: |
||
1494 | cmp eax,[LAST_CLUSTER] ; end of file |
||
1495 | ja delete_OK |
||
1496 | cmp eax,2 ; unfinished fat chain or zero length file |
||
1497 | jb delete_OK |
||
1498 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1499 | jz delete_OK |
||
1500 | |||
1501 | xor edx,edx |
||
1502 | call set_FAT ; clear fat entry |
||
1503 | cmp [hd_error],0 |
||
1504 | jne access_denied_01 |
||
1505 | |||
1506 | inc ecx ; update cluster count |
||
1507 | mov eax,edx ; old cluster |
||
1508 | jmp clean_new_chain |
||
1509 | |||
1510 | delete_OK: |
||
1511 | call add_disk_free_space ; add clusters to free disk space |
||
1512 | access_denied_01: |
||
1513 | pop edx ecx eax |
||
1514 | ret |
||
1515 | |||
1516 | |||
1517 | clear_directory: |
||
1518 | ;----------------------------------------------------- |
||
1519 | ; input : eax = directory cluster |
||
1520 | ; ebp = directory deepnes |
||
1521 | ; Note : use recursive call |
||
1522 | ;----------------------------------------------------- |
||
1523 | pushad |
||
1524 | inc ebp |
||
1525 | cmp ebp,64 ; if over 63 directory deep |
||
1526 | jnb clear_error ; something must be wrong |
||
1527 | |||
1528 | clear_new_cluster: |
||
1529 | cmp eax,[LAST_CLUSTER] |
||
1530 | ja clear_end |
||
1531 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1532 | jz clear_end |
||
1533 | mov esi,eax ; esi = current directory cluster |
||
1534 | sub eax,2 |
||
1535 | jb clear_end |
||
1536 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1537 | imul eax,ecx |
||
1538 | add eax,[DATA_START] |
||
1539 | |||
1540 | clear_new_sector: |
||
1541 | mov edi,eax ; edi = current directory sector |
||
1542 | mov ebx,deltree_buffer |
||
1543 | call hd_read |
||
1544 | cmp [hd_error],0 |
||
1545 | jne clear_error |
||
1546 | |||
1547 | mov edx,512/32 ; count of dir entrys per sector = 16 |
||
1548 | |||
1549 | clear_analyze: |
||
1550 | mov al,[ebx+11] ; file attribute |
||
1551 | and al,0xf |
||
1552 | cmp al,0xf |
||
1553 | je clear_long_filename |
||
1554 | |||
1555 | cmp byte [ebx],'.' ; parent or current directory |
||
1556 | je clear_next_entry |
||
1557 | cmp byte [ebx],0xe5 ; deleted |
||
1558 | je clear_next_entry |
||
1559 | cmp byte [ebx],0 ; empty |
||
1560 | je clear_write_last |
||
1561 | ;je clear_next_entry |
||
1562 | |||
1563 | mov eax,[ebx+20-2] ; first cluster of entry |
||
1564 | mov ax,[ebx+26] |
||
1565 | and eax,[fatMASK] |
||
1566 | |||
1567 | test byte [ebx+11],0x10 ; is it directory? |
||
1568 | jz clear_file ; no |
||
1569 | |||
1570 | push eax ebx |
||
1571 | mov eax,edi |
||
1572 | mov ebx,deltree_buffer ; save buffer over recursive call |
||
1573 | call hd_write ; write directory sector to disk |
||
1574 | cmp [hd_error],0 |
||
1575 | jne clear_error |
||
1576 | |||
1577 | pop ebx eax |
||
1578 | |||
1579 | call clear_directory ; recursive call !!! |
||
1580 | jc clear_error ; exit if error found |
||
1581 | |||
1582 | push eax ebx |
||
1583 | mov eax,edi |
||
1584 | mov ebx,deltree_buffer |
||
1585 | call hd_read ; read directory sector again |
||
1586 | cmp [hd_error],0 |
||
1587 | jne clear_error_1 |
||
1588 | |||
1589 | pop ebx eax |
||
1590 | |||
1591 | clear_file: |
||
1592 | call clear_cluster_chain |
||
1593 | cmp [hd_error],0 |
||
1594 | jne clear_error |
||
1595 | |||
1596 | clear_long_filename: |
||
1597 | mov byte [ebx],0xe5 |
||
1598 | |||
1599 | clear_next_entry: |
||
1600 | add ebx,32 ; position of next dir entry |
||
1601 | dec edx |
||
1602 | jnz clear_analyze |
||
1603 | |||
1604 | mov eax,edi |
||
1605 | mov ebx,deltree_buffer |
||
1606 | call hd_write ; write directory sector to disk |
||
1607 | cmp [hd_error],0 |
||
1608 | jne clear_error |
||
1609 | |||
1610 | inc eax ; next sector |
||
1611 | dec ecx |
||
1612 | jnz clear_new_sector |
||
1613 | |||
1614 | mov eax,esi |
||
1615 | call get_FAT ; get next cluster |
||
1616 | cmp [hd_error],0 |
||
1617 | jne clear_error |
||
1618 | |||
1619 | jmp clear_new_cluster ; clear it |
||
1620 | |||
1621 | clear_write_last: |
||
1622 | mov eax,edi |
||
1623 | mov ebx,deltree_buffer |
||
1624 | call hd_write ; write directory sector to disk |
||
1625 | cmp [hd_error],0 |
||
1626 | jne clear_error |
||
1627 | |||
1628 | clear_end: |
||
1629 | popad |
||
1630 | clc |
||
1631 | ret |
||
1632 | clear_error_1: |
||
1633 | add esp,8 |
||
1634 | clear_error: |
||
1635 | popad |
||
1636 | stc |
||
1637 | ret |
||
1638 | |||
1639 | |||
1640 | delete_entry_name: |
||
1641 | ;----------------------------------------------------- |
||
1642 | ; input : eax = directory sector |
||
1643 | ; ebx = directory pointer in buffer |
||
1644 | ; longname_sec = 2 previous directory sectors |
||
1645 | ; output : ecx = first cluster |
||
1646 | ; change : eax,ebx,edx |
||
1647 | ;----------------------------------------------------- |
||
1648 | mov byte [ebx],0xe5 |
||
1649 | mov ecx,[ebx+20-2] ; first cluster of file |
||
1650 | mov cx,[ebx+26] ; 0 length files start cluster = 0 |
||
1651 | and ecx,[fatMASK] |
||
1652 | |||
1653 | delete_empty: |
||
1654 | sub ebx,32 |
||
1655 | cmp ebx,buffer |
||
1656 | jnb delete_test_long |
||
1657 | |||
1658 | mov ebx,buffer |
||
1659 | call hd_write ; write directory sector back |
||
1660 | cmp [hd_error],0 |
||
1661 | jne delete_name_end |
||
1662 | |||
1663 | xor eax,eax |
||
1664 | xchg eax,[longname_sec2] |
||
1665 | xchg eax,[longname_sec1] |
||
1666 | test eax,eax ; is there previous directory sector? |
||
1667 | jz delete_name_end ; no |
||
1668 | |||
1669 | mov ebx,buffer |
||
1670 | call hd_read ; read previous sector |
||
1671 | cmp [hd_error],0 |
||
1672 | jne delete_name_end |
||
1673 | |||
1674 | mov ebx,buffer+0x1e0 ; start from last entry |
||
1675 | |||
1676 | delete_test_long: |
||
1677 | mov dh,[ebx+11] ; file attribute |
||
1678 | and dh,0xf |
||
1679 | cmp dh,0xf |
||
1680 | jne delete_write_buffer |
||
1681 | |||
1682 | cmp byte [ebx],0x40 ; end of long dir entry? |
||
1683 | mov byte [ebx],0xe5 |
||
1684 | jb delete_empty |
||
1685 | |||
1686 | delete_write_buffer: |
||
1687 | mov ebx,buffer |
||
1688 | call hd_write ; write directory sector back |
||
1689 | |||
1690 | delete_name_end: |
||
1691 | ret |
||
1692 | |||
1693 | |||
1694 | rename: |
||
1695 | ;----------------------------------------------------------- |
||
1696 | ; input : eax = source directory name |
||
1697 | ; edx = source path |
||
1698 | ; ebx = dest directory name |
||
1699 | ; edi = dest path |
||
1700 | ; output : eax = 0 - ok |
||
1701 | ; 3 - unknown FS |
||
1702 | ; 5 - file not found |
||
1703 | ; 8 - disk full |
||
1704 | ; 10 - access denied |
||
1705 | ;----------------------------------------------------------- |
||
1706 | cmp [fat_type],0 |
||
1707 | jnz fat_ok_for_rename |
||
1708 | mov eax,ERROR_UNKNOWN_FS |
||
1709 | ret |
||
1710 | |||
1711 | fat_ok_for_rename: |
||
1712 | ; call reserve_hd1 |
||
1713 | |||
1714 | pushad |
||
1715 | |||
1716 | mov ebx,edx ; source path |
||
1717 | call get_cluster_of_a_path |
||
1718 | jc rename_entry_not_found |
||
1719 | |||
1720 | mov ebx,PUSHAD_EAX ; source directory name |
||
1721 | call analyze_directory |
||
1722 | jc rename_entry_not_found |
||
1723 | |||
1724 | mov [sector_tmp],eax ; save source sector |
||
1725 | mov [entry_pos],ebx |
||
1726 | mov esi,ebx |
||
1727 | mov edi,dir_entry |
||
1728 | mov ecx,32/4 |
||
1729 | cld |
||
1730 | rep movsd ; save entry |
||
1731 | |||
1732 | mov ebx,PUSHAD_EDI ; dest path |
||
1733 | call get_cluster_of_a_path |
||
1734 | jc rename_entry_not_found |
||
1735 | |||
1736 | mov edx,eax ; save dest directory cluster |
||
1737 | mov ebx,PUSHAD_EBX ; dest directory name |
||
1738 | push [longname_sec1] |
||
1739 | push [longname_sec2] |
||
1740 | call analyze_directory ; check if entry already exist |
||
1741 | cmp [hd_error],0 |
||
1742 | jne rename_entry_already_exist_1 |
||
1743 | |||
1744 | pop [longname_sec2] |
||
1745 | pop [longname_sec1] |
||
1746 | jnc rename_entry_already_exist |
||
1747 | |||
1748 | mov eax,edx |
||
1749 | call analyze_directory_to_write |
||
1750 | jc rename_disk_full |
||
1751 | |||
1752 | mov esi,dir_entry |
||
1753 | mov edi,ebx |
||
1754 | mov ecx,32/4 |
||
1755 | cld |
||
1756 | rep movsd ; copy entry |
||
1757 | mov esi,PUSHAD_EBX ; dest directory name |
||
1758 | mov edi,ebx |
||
1759 | mov ecx,11 |
||
1760 | rep movsb ; copy name |
||
1761 | |||
1762 | mov ebx,buffer ; save the directory name,length,cluster |
||
1763 | call hd_write |
||
1764 | |||
1765 | test byte [dir_entry+11],0x10 ; is it directory? |
||
1766 | jz rename_not_dir ; no |
||
1767 | mov eax,[dir_entry+20-2] ; FAT entry |
||
1768 | mov ax,[dir_entry+26] |
||
1769 | and eax,[fatMASK] |
||
1770 | call change_2dot_cluster |
||
1771 | cmp [hd_error],0 |
||
1772 | jne rename_entry_already_exist |
||
1773 | |||
1774 | rename_not_dir: |
||
1775 | cmp [hd_error],0 |
||
1776 | jne rename_entry_already_exist |
||
1777 | mov eax,[sector_tmp] |
||
1778 | mov ebx,buffer |
||
1779 | call hd_read ; read source directory sector |
||
1780 | cmp [hd_error],0 |
||
1781 | jne rename_entry_already_exist |
||
1782 | |||
1783 | mov ebx,[entry_pos] |
||
1784 | call delete_entry_name |
||
1785 | cmp [hd_error],0 |
||
1786 | jne rename_entry_already_exist |
||
1787 | |||
1788 | popad |
||
1789 | call update_disk ; write all of cache and fat to hd |
||
1790 | cmp [hd_error],0 |
||
1791 | jne rename_entry_already_exist_2 |
||
1792 | mov [hd1_status],0 |
||
1793 | xor eax,eax |
||
1794 | ret |
||
1795 | |||
1796 | rename_entry_not_found: |
||
1797 | cmp [hd_error],0 |
||
1798 | jne rename_entry_already_exist |
||
1799 | popad |
||
1800 | mov [hd1_status],0 |
||
1801 | mov eax,ERROR_FILE_NOT_FOUND |
||
1802 | ret |
||
1803 | |||
1804 | rename_entry_already_exist_1: |
||
1805 | add esp,8 |
||
1806 | rename_entry_already_exist: |
||
1807 | popad |
||
1808 | rename_entry_already_exist_2: |
||
1809 | mov [hd1_status],0 |
||
1810 | mov eax,ERROR_ACCESS_DENIED |
||
1811 | ret |
||
1812 | |||
1813 | rename_disk_full: |
||
1814 | cmp [hd_error],0 |
||
1815 | jne rename_entry_already_exist |
||
1816 | popad |
||
1817 | mov [hd1_status],0 |
||
1818 | mov eax,ERROR_DISK_FULL |
||
1819 | ret |
||
1820 | |||
1821 | |||
1822 | change_2dot_cluster: |
||
1823 | ;----------------------------------------------------------- |
||
1824 | ; input : eax = directory cluster |
||
1825 | ; edx = value to save |
||
1826 | ; change : eax,ebx,edx |
||
1827 | ;----------------------------------------------------------- |
||
1828 | cmp eax,[LAST_CLUSTER] |
||
1829 | ja not_2dot ; too big cluster number, something is wrong |
||
1830 | sub eax,2 |
||
1831 | jb not_2dot |
||
1832 | |||
1833 | imul eax,[SECTORS_PER_CLUSTER] |
||
1834 | add eax,[DATA_START] |
||
1835 | mov ebx,buffer |
||
1836 | call hd_read |
||
1837 | cmp [hd_error],0 |
||
1838 | jne not_2dot |
||
1839 | |||
1840 | cmp dword [ebx+32],'.. ' |
||
1841 | jnz not_2dot |
||
1842 | |||
1843 | cmp edx,[ROOT_CLUSTER] ; is rootdir cluster? |
||
1844 | jne not_2dot_root |
||
1845 | xor edx,edx ; yes. set it zero |
||
1846 | |||
1847 | not_2dot_root: |
||
1848 | mov [ebx+32+26],dx ; 16 bits low of cluster |
||
1849 | shr edx,16 |
||
1850 | mov [ebx+32+20],dx ; 16 bits high of cluster (=0 fat16) |
||
1851 | call hd_write |
||
1852 | |||
1853 | not_2dot: |
||
1854 | ret |
||
1855 | |||
1856 | |||
1857 | get_hd_info: |
||
1858 | ;----------------------------------------------------------- |
||
1859 | ; output : eax = 0 - ok |
||
1860 | ; 3 - unknown FS |
||
1861 | ; 10 - access denied |
||
1862 | ; edx = cluster size in bytes |
||
1863 | ; ebx = total clusters on disk |
||
1864 | ; ecx = free clusters on disk |
||
1865 | ;----------------------------------------------------------- |
||
1866 | cmp [fat_type],0 |
||
1867 | jnz info_fat_ok |
||
1868 | xor edx,edx |
||
1869 | xor ebx,ebx |
||
1870 | xor ecx,ecx |
||
1871 | mov eax,ERROR_UNKNOWN_FS |
||
1872 | ret |
||
1873 | |||
1874 | info_fat_ok: |
||
1875 | ; call reserve_hd1 |
||
1876 | |||
1877 | xor ecx,ecx ; count of free clusters |
||
1878 | mov eax,2 |
||
1879 | mov ebx,[LAST_CLUSTER] |
||
1880 | |||
1881 | info_cluster: |
||
1882 | push eax |
||
1883 | call get_FAT ; get cluster info |
||
1884 | cmp [hd_error],0 |
||
1885 | jne info_access_denied |
||
1886 | |||
1887 | test eax,eax ; is it free? |
||
1888 | jnz info_used ; no |
||
1889 | inc ecx |
||
1890 | |||
1891 | info_used: |
||
1892 | pop eax |
||
1893 | inc eax |
||
1894 | cmp eax,ebx ; is above last cluster? |
||
1895 | jbe info_cluster ; no. test next cluster |
||
1896 | |||
1897 | dec ebx ; cluster count |
||
1898 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1899 | mov [hd1_status],0 |
||
1900 | xor eax,eax |
||
1901 | ret |
||
1902 | |||
1903 | info_access_denied: |
||
1904 | add esp,4 |
||
1905 | xor edx,edx |
||
1906 | xor ebx,ebx |
||
1907 | xor ecx,ecx |
||
1908 | mov eax,ERROR_ACCESS_DENIED |
||
1909 | ret |
||
1910 | |||
1911 | update_disk: |
||
1912 | ;----------------------------------------------------------- |
||
1913 | ; write changed fat and cache to disk |
||
1914 | ;----------------------------------------------------------- |
||
1915 | cmp [fat_change],0 ; is fat changed? |
||
1916 | je upd_no_change |
||
1917 | |||
1918 | call write_fat_sector |
||
1919 | cmp [hd_error],0 |
||
1920 | jne update_disk_acces_denied |
||
1921 | |||
1922 | upd_no_change: |
||
1923 | |||
1924 | call write_cache |
||
1925 | update_disk_acces_denied: |
||
1926 | ret |
||
1927 | |||
1928 | |||
1929 | ;************************************************************************** |
||
1930 | ; |
||
1931 | ; 0x600008 - first entry in cache list |
||
1932 | ; |
||
1933 | ; +0 - lba sector |
||
1934 | ; +4 - state of cache sector |
||
1935 | ; 0 = empty |
||
1936 | ; 1 = used for read ( same as in hd ) |
||
1937 | ; 2 = used for write ( differs from hd ) |
||
1938 | ; |
||
1939 | ; +65536 - cache entries |
||
1940 | ; |
||
1941 | ;************************************************************************** |
||
1942 | |||
1943 | |||
1944 | hd_read: |
||
1945 | ;----------------------------------------------------------- |
||
1946 | ; input : eax = block to read |
||
1947 | ; ebx = destination |
||
1948 | ;----------------------------------------------------------- |
||
1949 | push ecx esi edi ; scan cache |
||
1950 | |||
1951 | mov ecx,cache_max ; entries in cache |
||
1952 | mov esi,0x600000+8 |
||
1953 | mov edi,1 |
||
1954 | |||
1955 | hdreadcache: |
||
1956 | |||
1957 | cmp dword [esi+4],0 ; empty |
||
1958 | je nohdcache |
||
1959 | |||
1960 | cmp [esi],eax ; correct sector |
||
1961 | je yeshdcache |
||
1962 | |||
1963 | nohdcache: |
||
1964 | |||
1965 | add esi,8 |
||
1966 | inc edi |
||
1967 | dec ecx |
||
1968 | jnz hdreadcache |
||
1969 | |||
1970 | call find_empty_slot ; ret in edi |
||
1971 | cmp [hd_error],0 |
||
1972 | jne return_01 |
||
1973 | |||
1974 | push eax edx |
||
1975 | |||
1976 | call wait_for_hd_idle |
||
1977 | cmp [hd_error],0 |
||
1978 | jne hd_read_error |
||
1979 | |||
1980 | cli |
||
1981 | xor eax,eax |
||
1982 | mov edx,[hdbase] |
||
1983 | inc edx |
||
1984 | out dx,al ; ATAFeatures ॣ¨áâà "®á®¡¥®á⥩" |
||
1985 | inc edx |
||
1986 | inc eax |
||
1987 | out dx,al ; ATASectorCount áç¥â稪 ᥪâ®à®¢ |
||
1988 | inc edx |
||
1989 | mov eax,[esp+4] |
||
1990 | out dx,al ; ATASectorNumber ॣ¨áâà ®¬¥à ᥪâ®à |
||
1991 | shr eax,8 |
||
1992 | inc edx |
||
1993 | out dx,al ; ATACylinder ®¬¥à 樫¨¤à (¬« ¤è¨© ¡ ©â) |
||
1994 | shr eax,8 |
||
1995 | inc edx |
||
1996 | out dx,al ; ®¬¥à 樫¨¤à (áâ à訩 ¡ ©â) |
||
1997 | shr eax,8 |
||
1998 | inc edx |
||
1999 | and al,1+2+4+8 |
||
2000 | add al,byte [hdid] |
||
2001 | add al,128+64+32 |
||
2002 | out dx,al ; ®¬¥à £®«®¢ª¨/®¬¥à ¤¨áª |
||
2003 | inc edx |
||
2004 | mov al,20h |
||
2005 | out dx,al ; ATACommand ॣ¨áâà ª®¬ ¤ |
||
2006 | sti |
||
2007 | |||
2008 | call wait_for_sector_buffer |
||
2009 | |||
2010 | cmp [hd_error],0 |
||
2011 | jne hd_read_error |
||
2012 | |||
2013 | cli |
||
2014 | push edi |
||
2015 | shl edi,9 |
||
2016 | add edi,0x600000+65536 |
||
2017 | mov ecx,256 |
||
2018 | mov edx,[hdbase] |
||
2019 | cld |
||
2020 | rep insw |
||
2021 | pop edi |
||
2022 | sti |
||
2023 | |||
2024 | pop edx eax |
||
2025 | blok_read_2: |
||
2026 | lea esi,[edi*8+0x600000] |
||
2027 | mov [esi],eax ; sector number |
||
2028 | mov dword [esi+4],1 ; hd read - mark as same as in hd |
||
2029 | |||
2030 | yeshdcache: |
||
2031 | |||
2032 | mov esi,edi |
||
2033 | shl esi,9 |
||
2034 | add esi,0x600000+65536 |
||
2035 | mov edi,ebx |
||
2036 | mov ecx,512/4 |
||
2037 | cld |
||
2038 | rep movsd ; move data |
||
2039 | return_01: |
||
2040 | pop edi esi ecx |
||
2041 | ret |
||
2042 | |||
2043 | |||
2044 | hd_write: |
||
2045 | ;----------------------------------------------------------- |
||
2046 | ; input : eax = block |
||
2047 | ; ebx = pointer to memory |
||
2048 | ;----------------------------------------------------------- |
||
2049 | push ecx esi edi |
||
2050 | |||
2051 | ; check if the cache already has the sector and overwrite it |
||
2052 | |||
2053 | mov ecx,cache_max |
||
2054 | mov esi,0x600000+8 |
||
2055 | mov edi,1 |
||
2056 | |||
2057 | hdwritecache: |
||
2058 | |||
2059 | cmp dword [esi+4],0 ; if cache slot is empty |
||
2060 | je not_in_cache_write |
||
2061 | |||
2062 | cmp [esi],eax ; if the slot has the sector |
||
2063 | je yes_in_cache_write |
||
2064 | |||
2065 | not_in_cache_write: |
||
2066 | |||
2067 | add esi,8 |
||
2068 | inc edi |
||
2069 | dec ecx |
||
2070 | jnz hdwritecache |
||
2071 | |||
2072 | ; sector not found in cache |
||
2073 | ; write the block to a new location |
||
2074 | |||
2075 | call find_empty_slot ; ret in edi |
||
2076 | cmp [hd_error],0 |
||
2077 | jne hd_write_access_denied |
||
2078 | |||
2079 | lea esi,[edi*8+0x600000] |
||
2080 | mov [esi],eax ; sector number |
||
2081 | |||
2082 | yes_in_cache_write: |
||
2083 | |||
2084 | mov dword [esi+4],2 ; write - differs from hd |
||
2085 | |||
2086 | shl edi,9 |
||
2087 | add edi,0x600000+65536 |
||
2088 | mov esi,ebx |
||
2089 | mov ecx,512/4 |
||
2090 | cld |
||
2091 | rep movsd ; move data |
||
2092 | hd_write_access_denied: |
||
2093 | pop edi esi ecx |
||
2094 | ret |
||
2095 | |||
2096 | |||
2097 | write_cache: |
||
2098 | ;----------------------------------------------------------- |
||
2099 | ; write all changed sectors to disk |
||
2100 | ;----------------------------------------------------------- |
||
2101 | push eax ecx edx esi edi |
||
2102 | |||
2103 | ; write difference ( 2 ) from cache to hd |
||
2104 | |||
2105 | mov ecx,cache_max |
||
2106 | mov esi,0x600000+8 |
||
2107 | mov edi,1 |
||
2108 | |||
2109 | write_cache_more: |
||
2110 | |||
2111 | cmp dword [esi+4],2 ; if cache slot is not different |
||
2112 | jne does_not_need_writing |
||
2113 | |||
2114 | mov dword [esi+4],1 ; same as in hd |
||
2115 | mov eax,[esi] ; eax = sector to write |
||
2116 | |||
2117 | cmp eax,[PARTITION_START] |
||
2118 | jb danger |
||
2119 | cmp eax,[PARTITION_END] |
||
2120 | ja danger |
||
2121 | |||
2122 | call wait_for_hd_idle |
||
2123 | cmp [hd_error],0 |
||
2124 | jne hd_write_error |
||
2125 | |||
2126 | cli |
||
2127 | xor eax,eax |
||
2128 | mov edx,[hdbase] |
||
2129 | inc edx |
||
2130 | out dx,al |
||
2131 | inc edx |
||
2132 | inc eax |
||
2133 | out dx,al |
||
2134 | inc edx |
||
2135 | mov eax,[esi] ; eax = sector to write |
||
2136 | out dx,al |
||
2137 | shr eax,8 |
||
2138 | inc edx |
||
2139 | out dx,al |
||
2140 | shr eax,8 |
||
2141 | inc edx |
||
2142 | out dx,al |
||
2143 | shr eax,8 |
||
2144 | inc edx |
||
2145 | and al,1+2+4+8 |
||
2146 | add al,byte [hdid] |
||
2147 | add al,128+64+32 |
||
2148 | out dx,al |
||
2149 | inc edx |
||
2150 | mov al,30h |
||
2151 | out dx,al |
||
2152 | sti |
||
2153 | |||
2154 | call wait_for_sector_buffer |
||
2155 | |||
2156 | cmp [hd_error],0 |
||
2157 | jne hd_write_error |
||
2158 | |||
2159 | push ecx esi |
||
2160 | |||
2161 | cli |
||
2162 | mov esi,edi |
||
2163 | shl esi,9 |
||
2164 | add esi,0x600000+65536 ; esi = from memory position |
||
2165 | mov ecx,256 |
||
2166 | mov edx,[hdbase] |
||
2167 | cld |
||
2168 | rep outsw |
||
2169 | sti |
||
2170 | |||
2171 | pop esi ecx |
||
2172 | |||
2173 | danger: |
||
2174 | does_not_need_writing: |
||
2175 | |||
2176 | add esi,8 |
||
2177 | inc edi |
||
2178 | dec ecx |
||
2179 | jnz write_cache_more |
||
2180 | return_02: |
||
2181 | pop edi esi edx ecx eax |
||
2182 | ret |
||
2183 | |||
2184 | |||
2185 | find_empty_slot: |
||
2186 | ;----------------------------------------------------------- |
||
2187 | ; find empty or read slot, flush cache if next 10% is used by write |
||
2188 | ; output : edi = cache slot |
||
2189 | ;----------------------------------------------------------- |
||
2190 | push ecx esi |
||
2191 | |||
2192 | search_again: |
||
2193 | |||
2194 | mov ecx,cache_max*10/100 |
||
2195 | mov edi,[cache_search_start] |
||
2196 | |||
2197 | search_for_empty: |
||
2198 | |||
2199 | inc edi |
||
2200 | cmp edi,cache_max |
||
2201 | jbe inside_cache |
||
2202 | mov edi,1 |
||
2203 | |||
2204 | inside_cache: |
||
2205 | |||
2206 | cmp dword [edi*8+0x600000+4],2 ; get cache slot info |
||
2207 | jb found_slot ; it's empty or read |
||
2208 | dec ecx |
||
2209 | jnz search_for_empty |
||
2210 | |||
2211 | call write_cache ; no empty slots found, write all |
||
2212 | cmp [hd_error],0 |
||
2213 | jne found_slot_access_denied |
||
2214 | |||
2215 | jmp search_again ; and start again |
||
2216 | |||
2217 | found_slot: |
||
2218 | |||
2219 | mov [cache_search_start],edi |
||
2220 | found_slot_access_denied: |
||
2221 | pop esi ecx |
||
2222 | ret |
||
2223 | |||
2224 | |||
2225 | save_hd_wait_timeout: |
||
2226 | |||
2227 | push eax |
||
2228 | mov eax,[timer_ticks];[0xfdf0] |
||
2229 | add eax,300 ; 3 sec timeout |
||
2230 | mov [hd_wait_timeout],eax |
||
2231 | pop eax |
||
2232 | ret |
||
2233 | |||
2234 | |||
2235 | check_hd_wait_timeout: |
||
2236 | |||
2237 | push eax |
||
2238 | mov eax,[hd_wait_timeout] |
||
2239 | cmp [timer_ticks], eax ;[0xfdf0],eax |
||
2240 | jg hd_timeout_error |
||
2241 | pop eax |
||
2242 | mov [hd_error],0 |
||
2243 | ret |
||
2244 | |||
2245 | iglobal |
||
2246 | hd_timeout_str db 'K : FS - HD timeout',13,10,0 |
||
2247 | hd_read_str db 'K : FS - HD read error',13,10,0 |
||
2248 | hd_write_str db 'K : FS - HD write error',13,10,0 |
||
2249 | hd_lba_str db 'K : FS - HD LBA error',13,10,0 |
||
2250 | endg |
||
2251 | |||
2252 | hd_timeout_error: |
||
2253 | |||
2254 | call clear_hd_cache |
||
2255 | call clear_application_table_status |
||
2256 | mov esi,hd_timeout_str |
||
2257 | call sys_msg_board_str |
||
2258 | ; jmp $ |
||
2259 | mov [hd_error],1 |
||
2260 | pop eax |
||
2261 | ret |
||
2262 | |||
2263 | hd_read_error: |
||
2264 | |||
2265 | call clear_hd_cache |
||
2266 | call clear_application_table_status |
||
2267 | mov esi,hd_read_str |
||
2268 | call sys_msg_board_str |
||
2269 | pop edx eax |
||
2270 | jmp return_01 |
||
2271 | ; jmp $ |
||
2272 | |||
2273 | hd_write_error: |
||
2274 | |||
2275 | call clear_hd_cache |
||
2276 | call clear_application_table_status |
||
2277 | mov esi,hd_write_str |
||
2278 | call sys_msg_board_str |
||
2279 | jmp return_02 |
||
2280 | ; jmp $ |
||
2281 | |||
2282 | hd_lba_error: |
||
2283 | call clear_hd_cache |
||
2284 | call clear_application_table_status |
||
2285 | mov esi,hd_lba_str |
||
2286 | call sys_msg_board_str |
||
2287 | jmp LBA_read_ret |
||
2288 | |||
2289 | |||
2290 | wait_for_hd_idle: |
||
2291 | |||
2292 | push eax edx |
||
2293 | |||
2294 | call save_hd_wait_timeout |
||
2295 | |||
2296 | mov edx,[hdbase] |
||
2297 | add edx,0x7 |
||
2298 | |||
2299 | wfhil1: |
||
2300 | |||
2301 | call check_hd_wait_timeout |
||
2302 | cmp [hd_error],0 |
||
2303 | jne @f |
||
2304 | |||
2305 | in al,dx |
||
2306 | test al,128 |
||
2307 | jnz wfhil1 |
||
2308 | |||
2309 | @@: |
||
2310 | |||
2311 | pop edx eax |
||
2312 | ret |
||
2313 | |||
2314 | |||
2315 | |||
2316 | wait_for_sector_buffer: |
||
2317 | |||
2318 | push eax edx |
||
2319 | |||
2320 | mov edx,[hdbase] |
||
2321 | add edx,0x7 |
||
2322 | |||
2323 | call save_hd_wait_timeout |
||
2324 | |||
2325 | hdwait_sbuf: ; wait for sector buffer to be ready |
||
2326 | |||
2327 | call check_hd_wait_timeout |
||
2328 | cmp [hd_error],0 |
||
2329 | jne @f |
||
2330 | |||
2331 | in al,dx |
||
2332 | test al,8 |
||
2333 | jz hdwait_sbuf |
||
2334 | |||
2335 | mov [hd_error],0 |
||
2336 | |||
2337 | cmp [hd_setup],1 ; do not mark error for setup request |
||
2338 | je buf_wait_ok |
||
2339 | |||
2340 | test al,1 ; previous command ended up with an error |
||
2341 | jz buf_wait_ok |
||
2342 | @@: |
||
2343 | mov [hd_error],1 |
||
2344 | |||
2345 | buf_wait_ok: |
||
2346 | |||
2347 | pop edx eax |
||
2348 | ret |
||
2349 | |||
2350 | |||
2351 | |||
2352 | read_hd_file: |
||
2353 | ;----------------------------------------------------------------- |
||
2354 | ; |
||
2355 | ; Converting old reading function for hd-application start. |
||
2356 | ; |
||
2357 | ; IN: |
||
2358 | ; |
||
2359 | ; eax - pointer to file (0 = read only first sector of drive: eg 'label') |
||
2360 | ; ebx - file lenght |
||
2361 | ; ecx - start 512 byte block number |
||
2362 | ; edx - number of blocks to read |
||
2363 | ; esi - pointer to return/work area (atleast 20 000 bytes) |
||
2364 | ; |
||
2365 | ; For new read function |
||
2366 | ; |
||
2367 | ; EAX (PAR0) pointer to file-name |
||
2368 | ; ECX (PAR1) pointer to buffer |
||
2369 | ; EBX (PAR2) vt file blocks to read |
||
2370 | ; EDX (PAR3) pointer to path |
||
2371 | ; ESI vt first 512 block to read |
||
2372 | ; EDI if 0 - return root |
||
2373 | ;-------------------------------------------------------------------------- |
||
2374 | |||
2375 | push ecx esi edi |
||
2376 | mov esi,eax |
||
2377 | mov edi,startpath |
||
2378 | mov ecx,250 |
||
2379 | cld |
||
2380 | rep movsb |
||
2381 | pop edi esi ecx |
||
2382 | |||
2383 | mov eax,startpath |
||
2384 | mov [eax+ebx-12],byte 0 |
||
2385 | |||
2386 | push eax ebx ecx edx esi |
||
2387 | |||
2388 | pop ecx ; pointer to buffer |
||
2389 | add ecx,1024 |
||
2390 | pop ebx ; number of blocks to read |
||
2391 | pop esi ; first block to read |
||
2392 | dec esi |
||
2393 | pop eax ; file length |
||
2394 | pop edx ; pointer to path |
||
2395 | |||
2396 | mov edi,12 |
||
2397 | lea eax,[eax+edx-12+1] |
||
2398 | call file_read |
||
2399 | |||
2400 | ret |
||
2401 | |||
2402 | ; \begin{diamond} |
||
2403 | hd_find_lfn: |
||
2404 | ; in: esi->name |
||
2405 | ; out: CF=1 - file not found |
||
2406 | ; else CF=0 and edi->direntry, eax=sector |
||
2407 | ; destroys eax |
||
2408 | push esi edi |
||
2409 | push 0 |
||
2410 | push 0 |
||
2411 | push fat16_root_first |
||
2412 | push fat16_root_next |
||
2413 | mov eax, [ROOT_CLUSTER] |
||
2414 | cmp [fat_type], 32 |
||
2415 | jz .fat32 |
||
2416 | .loop: |
||
2417 | call fat_find_lfn |
||
2418 | jc .notfound |
||
2419 | cmp byte [esi], 0 |
||
2420 | jz .found |
||
2421 | test byte [edi+11], 10h |
||
2422 | jz .notfound |
||
2423 | and dword [esp+12], 0 |
||
2424 | mov eax, [edi+20-2] |
||
2425 | mov ax, [edi+26] ; cluster |
||
2426 | .fat32: |
||
2427 | mov [esp+8], eax |
||
2428 | mov dword [esp+4], fat_notroot_first |
||
2429 | mov dword [esp], fat_notroot_next |
||
2430 | jmp .loop |
||
2431 | .notfound: |
||
2432 | add esp, 16 |
||
2433 | pop edi esi |
||
2434 | stc |
||
2435 | ret |
||
2436 | .found: |
||
2437 | lea eax, [esp+8] |
||
2438 | cmp dword [eax], 0 |
||
2439 | jz .root |
||
2440 | call fat_get_sector |
||
2441 | jmp .cmn |
||
2442 | .root: |
||
2443 | mov eax, [eax+4] |
||
2444 | add eax, [ROOT_START] |
||
2445 | .cmn: |
||
2446 | add esp, 20 ; CF=0 |
||
2447 | pop esi |
||
2448 | ret |
||
2449 | |||
2450 | ;---------------------------------------------------------------- |
||
2451 | ; |
||
2452 | ; fs_HdRead - LFN variant for reading hard disk |
||
2453 | ; |
||
2454 | ; esi points to filename |
||
2455 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2456 | ; may be ebx=0 - start from first byte |
||
2457 | ; ecx number of bytes to read, 0+ |
||
2458 | ; edx mem location to return data |
||
2459 | ; |
||
2460 | ; ret ebx = bytes read or 0xffffffff file not found |
||
2461 | ; eax = 0 ok read or other = errormsg |
||
2462 | ; |
||
2463 | ;-------------------------------------------------------------- |
||
2464 | fs_HdRead: |
||
2465 | cmp [fat_type], 0 |
||
2466 | jnz @f |
||
2467 | or ebx, -1 |
||
2468 | mov eax, ERROR_UNKNOWN_FS |
||
2469 | ret |
||
2470 | @@: |
||
2471 | push edi |
||
2472 | cmp byte [esi], 0 |
||
2473 | jnz @f |
||
2474 | .noaccess: |
||
2475 | pop edi |
||
2476 | .noaccess_2: |
||
2477 | or ebx, -1 |
||
2478 | mov eax, ERROR_ACCESS_DENIED |
||
2479 | ret |
||
2480 | |||
2481 | .noaccess_3: |
||
2482 | add esp,4 |
||
2483 | .noaccess_1: |
||
2484 | add esp,4 |
||
2485 | .noaccess_4: |
||
2486 | add esp,4*5 |
||
2487 | jmp .noaccess_2 |
||
2488 | |||
2489 | @@: |
||
2490 | call hd_find_lfn |
||
2491 | jnc .found |
||
2492 | pop edi |
||
2493 | cmp [hd_error],0 |
||
2494 | jne .noaccess_2 |
||
2495 | or ebx, -1 |
||
2496 | mov eax, ERROR_FILE_NOT_FOUND |
||
2497 | ret |
||
2498 | |||
2499 | .found: |
||
2500 | test byte [edi+11], 0x10 ; do not allow read directories |
||
2501 | jnz .noaccess |
||
2502 | test ebx, ebx |
||
2503 | jz .l1 |
||
2504 | cmp dword [ebx+4], 0 |
||
2505 | jz @f |
||
2506 | xor ebx, ebx |
||
2507 | .reteof: |
||
2508 | mov eax, 6 |
||
2509 | pop edi |
||
2510 | ret |
||
2511 | @@: |
||
2512 | mov ebx, [ebx] |
||
2513 | .l1: |
||
2514 | push ecx edx |
||
2515 | push 0 |
||
2516 | mov eax, [edi+28] |
||
2517 | sub eax, ebx |
||
2518 | jb .eof |
||
2519 | cmp eax, ecx |
||
2520 | jae @f |
||
2521 | mov ecx, eax |
||
2522 | mov byte [esp], 6 |
||
2523 | @@: |
||
2524 | mov eax, [edi+20-2] |
||
2525 | mov ax, [edi+26] |
||
2526 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
||
2527 | .new_cluster: |
||
2528 | jecxz .new_sector |
||
2529 | test eax, eax |
||
2530 | jz .eof |
||
2531 | cmp eax, [fatRESERVED] |
||
2532 | jae .eof |
||
2533 | mov [cluster_tmp], eax |
||
2534 | dec eax |
||
2535 | dec eax |
||
2536 | mov edi, [SECTORS_PER_CLUSTER] |
||
2537 | imul eax, edi |
||
2538 | add eax, [DATA_START] |
||
2539 | .new_sector: |
||
2540 | test ecx, ecx |
||
2541 | jz .done |
||
2542 | sub ebx, 512 |
||
2543 | jae .skip |
||
2544 | add ebx, 512 |
||
2545 | jnz .force_buf |
||
2546 | cmp ecx, 512 |
||
2547 | jb .force_buf |
||
2548 | ; we may read directly to given buffer |
||
2549 | push ebx |
||
2550 | mov ebx, edx |
||
2551 | call hd_read |
||
2552 | cmp [hd_error],0 |
||
2553 | jne .noaccess_1 |
||
2554 | pop ebx |
||
2555 | add edx, 512 |
||
2556 | sub ecx, 512 |
||
2557 | jmp .skip |
||
2558 | .force_buf: |
||
2559 | ; we must read sector to temporary buffer and then copy it to destination |
||
2560 | push eax ebx |
||
2561 | mov ebx, buffer |
||
2562 | call hd_read |
||
2563 | cmp [hd_error],0 |
||
2564 | jne .noaccess_3 |
||
2565 | |||
2566 | mov eax, ebx |
||
2567 | pop ebx |
||
2568 | add eax, ebx |
||
2569 | push ecx |
||
2570 | add ecx, ebx |
||
2571 | cmp ecx, 512 |
||
2572 | jbe @f |
||
2573 | mov ecx, 512 |
||
2574 | @@: |
||
2575 | sub ecx, ebx |
||
2576 | mov ebx, edx |
||
2577 | call memmove |
||
2578 | add edx, ecx |
||
2579 | sub [esp], ecx |
||
2580 | pop ecx |
||
2581 | pop eax |
||
2582 | xor ebx, ebx |
||
2583 | .skip: |
||
2584 | inc eax |
||
2585 | dec edi |
||
2586 | jnz .new_sector |
||
2587 | mov eax, [cluster_tmp] |
||
2588 | call get_FAT |
||
2589 | cmp [hd_error],0 |
||
2590 | jne .noaccess_4 |
||
2591 | |||
2592 | jmp .new_cluster |
||
2593 | .done: |
||
2594 | mov ebx, edx |
||
2595 | pop eax edx ecx edi |
||
2596 | sub ebx, edx |
||
2597 | ret |
||
2598 | .eof: |
||
2599 | mov ebx, edx |
||
2600 | pop eax edx ecx |
||
2601 | sub ebx, edx |
||
2602 | jmp .reteof |
||
2603 | |||
2604 | ;---------------------------------------------------------------- |
||
2605 | ; |
||
2606 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
2607 | ; |
||
2608 | ; esi points to filename |
||
2609 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
||
2610 | ; & flags (bitfields) |
||
2611 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
2612 | ; ecx number of blocks to read, 0+ |
||
2613 | ; edx mem location to return data |
||
2614 | ; |
||
2615 | ; ret ebx = blocks read or 0xffffffff folder not found |
||
2616 | ; eax = 0 ok read or other = errormsg |
||
2617 | ; |
||
2618 | ;-------------------------------------------------------------- |
||
2619 | fs_HdReadFolder: |
||
2620 | mov eax, [ROOT_CLUSTER] |
||
2621 | push edi |
||
2622 | cmp byte [esi], 0 |
||
2623 | jz .doit |
||
2624 | call hd_find_lfn |
||
2625 | jnc .found |
||
2626 | pop edi |
||
2627 | or ebx, -1 |
||
2628 | mov eax, ERROR_FILE_NOT_FOUND |
||
2629 | ret |
||
2630 | .found: |
||
2631 | test byte [edi+11], 0x10 ; do not allow read files |
||
2632 | jnz .found_dir |
||
2633 | pop edi |
||
2634 | or ebx, -1 |
||
2635 | mov eax, ERROR_ACCESS_DENIED |
||
2636 | ret |
||
2637 | .found_dir: |
||
2638 | mov eax, [edi+20-2] |
||
2639 | mov ax, [edi+26] ; eax=cluster |
||
2640 | .doit: |
||
2641 | push esi ecx |
||
2642 | push ebp |
||
2643 | sub esp, 262*2 ; reserve space for LFN |
||
2644 | mov ebp, esp |
||
2645 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
||
2646 | mov ebx, [ebx] |
||
2647 | ; init header |
||
2648 | push eax ecx |
||
2649 | mov edi, edx |
||
2650 | mov ecx, 32/4 |
||
2651 | xor eax, eax |
||
2652 | rep stosd |
||
2653 | pop ecx eax |
||
2654 | mov byte [edx], 1 ; version |
||
2655 | mov esi, edi ; esi points to BDFE |
||
2656 | .new_cluster: |
||
2657 | mov [cluster_tmp], eax |
||
2658 | test eax, eax |
||
2659 | jnz @f |
||
2660 | cmp [fat_type], 32 |
||
2661 | jz .notfound |
||
2662 | mov eax, [ROOT_START] |
||
2663 | push [ROOT_SECTORS] |
||
2664 | push ebx |
||
2665 | jmp .new_sector |
||
2666 | @@: |
||
2667 | dec eax |
||
2668 | dec eax |
||
2669 | imul eax, [SECTORS_PER_CLUSTER] |
||
2670 | push [SECTORS_PER_CLUSTER] |
||
2671 | add eax, [DATA_START] |
||
2672 | push ebx |
||
2673 | .new_sector: |
||
2674 | mov ebx, buffer |
||
2675 | mov edi, ebx |
||
2676 | call hd_read |
||
2677 | cmp [hd_error], 0 |
||
2678 | jnz .notfound2 |
||
2679 | add ebx, 512 |
||
2680 | push eax |
||
2681 | .l1: |
||
2682 | call fat_get_name |
||
2683 | jc .l2 |
||
2684 | cmp byte [edi+11], 0xF |
||
2685 | jnz .do_bdfe |
||
2686 | add edi, 0x20 |
||
2687 | cmp edi, ebx |
||
2688 | jb .do_bdfe |
||
2689 | pop eax |
||
2690 | inc eax |
||
2691 | dec dword [esp+4] |
||
2692 | jnz @f |
||
2693 | mov eax, [cluster_tmp] |
||
2694 | test eax, eax |
||
2695 | jz .done |
||
2696 | call get_FAT |
||
2697 | cmp [hd_error], 0 |
||
2698 | jnz .notfound2 |
||
2699 | cmp eax, 2 |
||
2700 | jb .done |
||
2701 | cmp eax, [fatRESERVED] |
||
2702 | jae .done |
||
2703 | push eax |
||
2704 | mov eax, [SECTORS_PER_CLUSTER] |
||
2705 | mov [esp+8], eax |
||
2706 | pop eax |
||
2707 | mov [cluster_tmp], eax |
||
2708 | dec eax |
||
2709 | dec eax |
||
2710 | imul eax, [SECTORS_PER_CLUSTER] |
||
2711 | add eax, [DATA_START] |
||
2712 | @@: |
||
2713 | mov ebx, buffer |
||
2714 | mov edi, ebx |
||
2715 | call hd_read |
||
2716 | cmp [hd_error], 0 |
||
2717 | jnz .notfound2 |
||
2718 | add ebx, 512 |
||
2719 | push eax |
||
2720 | .do_bdfe: |
||
2721 | inc dword [edx+8] ; new file found |
||
2722 | dec dword [esp+4] |
||
2723 | jns .l2 |
||
2724 | dec ecx |
||
2725 | js .l2 |
||
2726 | inc dword [edx+4] ; new file block copied |
||
2727 | call fat_entry_to_bdfe |
||
2728 | .l2: |
||
2729 | add edi, 0x20 |
||
2730 | cmp edi, ebx |
||
2731 | jb .l1 |
||
2732 | pop eax |
||
2733 | inc eax |
||
2734 | dec dword [esp+4] |
||
2735 | jnz .new_sector |
||
2736 | mov eax, [cluster_tmp] |
||
2737 | test eax, eax |
||
2738 | jz .done |
||
2739 | call get_FAT |
||
2740 | cmp [hd_error], 0 |
||
2741 | jnz .notfound2 |
||
2742 | cmp eax, 2 |
||
2743 | jb .done |
||
2744 | cmp eax, [fatRESERVED] |
||
2745 | jae .done |
||
2746 | push eax |
||
2747 | mov eax, [SECTORS_PER_CLUSTER] |
||
2748 | mov [esp+8], eax |
||
2749 | pop eax |
||
2750 | pop ebx |
||
2751 | add esp, 4 |
||
2752 | jmp .new_cluster |
||
2753 | .notfound2: |
||
2754 | add esp, 8 |
||
2755 | .notfound: |
||
2756 | add esp, 262*2+4 |
||
2757 | pop ebp ecx esi edi |
||
2758 | mov eax, ERROR_FILE_NOT_FOUND |
||
2759 | or ebx, -1 |
||
2760 | ret |
||
2761 | .done: |
||
2762 | add esp, 262*2+4+8 |
||
2763 | pop ebp |
||
2764 | mov ebx, [edx+4] |
||
2765 | xor eax, eax |
||
2766 | dec ecx |
||
2767 | js @f |
||
2768 | mov al, ERROR_END_OF_FILE |
||
2769 | @@: |
||
2770 | pop ecx esi edi |
||
2771 | ret |
||
2772 | |||
2773 | fat16_root_next: |
||
2774 | cmp edi, buffer+0x200-0x20 |
||
2775 | jae fat16_root_next_sector |
||
2776 | add edi, 0x20 |
||
2777 | ret ; CF=0 |
||
2778 | fat16_root_next_sector: |
||
2779 | ; read next sector |
||
2780 | push ecx |
||
2781 | mov ecx, [eax+4] |
||
2782 | inc ecx |
||
2783 | mov [eax+4], ecx |
||
2784 | cmp ecx, [ROOT_SECTORS] |
||
2785 | pop ecx |
||
2786 | jae fat16_root_first.readerr |
||
2787 | fat16_root_first: |
||
2788 | mov eax, [eax+4] |
||
2789 | add eax, [ROOT_START] |
||
2790 | push ebx |
||
2791 | mov edi, buffer |
||
2792 | mov ebx, edi |
||
2793 | call hd_read |
||
2794 | pop ebx |
||
2795 | cmp [hd_error], 0 |
||
2796 | jnz .readerr |
||
2797 | ret ; CF=0 |
||
2798 | .readerr: |
||
2799 | stc |
||
2800 | ret |
||
2801 | fat16_root_begin_write: |
||
2802 | push edi eax |
||
2803 | call fat16_root_first |
||
2804 | pop eax edi |
||
2805 | ret |
||
2806 | fat16_root_end_write: |
||
2807 | pusha |
||
2808 | mov eax, [eax+4] |
||
2809 | add eax, [ROOT_START] |
||
2810 | mov ebx, buffer |
||
2811 | call hd_write |
||
2812 | popa |
||
2813 | ret |
||
2814 | fat16_root_next_write: |
||
2815 | cmp edi, buffer+0x200 |
||
2816 | jae @f |
||
2817 | ret |
||
2818 | @@: |
||
2819 | call fat16_root_end_write |
||
2820 | jmp fat16_root_next_sector |
||
2821 | fat16_root_extend_dir: |
||
2822 | stc |
||
2823 | ret |
||
2824 | |||
2825 | fat_notroot_next: |
||
2826 | cmp edi, buffer+0x200-0x20 |
||
2827 | jae fat_notroot_next_sector |
||
2828 | add edi, 0x20 |
||
2829 | ret ; CF=0 |
||
2830 | fat_notroot_next_sector: |
||
2831 | push ecx |
||
2832 | mov ecx, [eax+4] |
||
2833 | inc ecx |
||
2834 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
2835 | jae fat_notroot_next_cluster |
||
2836 | mov [eax+4], ecx |
||
2837 | jmp @f |
||
2838 | fat_notroot_next_cluster: |
||
2839 | push eax |
||
2840 | mov eax, [eax] |
||
2841 | call get_FAT |
||
2842 | mov ecx, eax |
||
2843 | pop eax |
||
2844 | cmp [hd_error], 0 |
||
2845 | jnz fat_notroot_next_err |
||
2846 | cmp ecx, [fatRESERVED] |
||
2847 | jae fat_notroot_next_err |
||
2848 | mov [eax], ecx |
||
2849 | and dword [eax+4], 0 |
||
2850 | @@: |
||
2851 | pop ecx |
||
2852 | fat_notroot_first: |
||
2853 | call fat_get_sector |
||
2854 | push ebx |
||
2855 | mov edi, buffer |
||
2856 | mov ebx, edi |
||
2857 | call hd_read |
||
2858 | pop ebx |
||
2859 | cmp [hd_error], 0 |
||
2860 | jnz @f |
||
2861 | ret ; CF=0 |
||
2862 | fat_notroot_next_err: |
||
2863 | pop ecx |
||
2864 | @@: |
||
2865 | stc |
||
2866 | ret |
||
2867 | fat_notroot_begin_write: |
||
2868 | push eax edi |
||
2869 | call fat_notroot_first |
||
2870 | pop edi eax |
||
2871 | ret |
||
2872 | fat_notroot_end_write: |
||
2873 | call fat_get_sector |
||
2874 | push ebx |
||
2875 | mov ebx, buffer |
||
2876 | call hd_write |
||
2877 | pop ebx |
||
2878 | ret |
||
2879 | fat_notroot_next_write: |
||
2880 | cmp edi, buffer+0x200 |
||
2881 | jae @f |
||
2882 | ret |
||
2883 | @@: |
||
2884 | push eax |
||
2885 | call fat_notroot_end_write |
||
2886 | pop eax |
||
2887 | jmp fat_notroot_next_sector |
||
2888 | fat_notroot_extend_dir: |
||
2889 | push eax |
||
2890 | mov eax, [eax] |
||
2891 | call get_free_FAT |
||
2892 | jnc .found |
||
2893 | pop eax |
||
2894 | ret ; CF=1 |
||
2895 | .found: |
||
2896 | push edx |
||
2897 | mov edx, [fatEND] |
||
2898 | call set_FAT |
||
2899 | mov edx, eax |
||
2900 | mov eax, [esp+4] |
||
2901 | mov eax, [eax] |
||
2902 | push edx |
||
2903 | call set_FAT |
||
2904 | pop edx |
||
2905 | cmp [hd_error], 0 |
||
2906 | jz @f |
||
2907 | pop edx |
||
2908 | pop eax |
||
2909 | stc |
||
2910 | ret |
||
2911 | @@: |
||
2912 | push ecx |
||
2913 | or ecx, -1 |
||
2914 | call add_disk_free_space |
||
2915 | ; zero new cluster |
||
2916 | mov ecx, 512/4 |
||
2917 | mov edi, buffer |
||
2918 | push edi |
||
2919 | xor eax, eax |
||
2920 | rep stosd |
||
2921 | pop edi |
||
2922 | pop ecx |
||
2923 | mov eax, [esp+4] |
||
2924 | mov [eax], edx |
||
2925 | and dword [eax+4], 0 |
||
2926 | pop edx |
||
2927 | mov eax, [eax] |
||
2928 | dec eax |
||
2929 | dec eax |
||
2930 | push ebx ecx |
||
2931 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2932 | imul eax, ecx |
||
2933 | add eax, [DATA_START] |
||
2934 | mov ebx, edi |
||
2935 | @@: |
||
2936 | call hd_write |
||
2937 | inc eax |
||
2938 | loop @b |
||
2939 | pop ecx ebx eax |
||
2940 | clc |
||
2941 | ret |
||
2942 | |||
2943 | fat_get_sector: |
||
2944 | push ecx |
||
2945 | mov ecx, [eax] |
||
2946 | dec ecx |
||
2947 | dec ecx |
||
2948 | imul ecx, [SECTORS_PER_CLUSTER] |
||
2949 | add ecx, [DATA_START] |
||
2950 | add ecx, [eax+4] |
||
2951 | mov eax, ecx |
||
2952 | pop ecx |
||
2953 | ret |
||
2954 | |||
2955 | ;---------------------------------------------------------------- |
||
2956 | ; |
||
2957 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
2958 | ; |
||
2959 | ; esi points to filename |
||
2960 | ; ebx ignored (reserved) |
||
2961 | ; ecx number of bytes to write, 0+ |
||
2962 | ; edx mem location to data |
||
2963 | ; |
||
2964 | ; ret ebx = number of written bytes |
||
2965 | ; eax = 0 ok read or other = errormsg |
||
2966 | ; |
||
2967 | ;-------------------------------------------------------------- |
||
2968 | fshrad: |
||
2969 | mov eax, ERROR_ACCESS_DENIED |
||
2970 | xor ebx, ebx |
||
2971 | ret |
||
2972 | fshrfs: |
||
2973 | mov eax, ERROR_UNKNOWN_FS |
||
2974 | xor ebx, ebx |
||
2975 | ret |
||
2976 | |||
2977 | fs_HdRewrite: |
||
2978 | cmp [fat_type], 0 |
||
2979 | jz fshrfs |
||
2980 | cmp byte [esi], 0 |
||
2981 | jz fshrad |
||
2982 | pushad |
||
2983 | xor ebp, ebp |
||
2984 | push esi |
||
2985 | @@: |
||
2986 | lodsb |
||
2987 | test al, al |
||
2988 | jz @f |
||
2989 | cmp al, '/' |
||
2990 | jnz @b |
||
2991 | lea ebp, [esi-1] |
||
2992 | jmp @b |
||
2993 | @@: |
||
2994 | pop esi |
||
2995 | test ebp, ebp |
||
2996 | jnz .noroot |
||
2997 | mov ebp, [ROOT_CLUSTER] |
||
2998 | cmp [fat_type], 32 |
||
2999 | jz .pushnotroot |
||
3000 | push fat16_root_extend_dir |
||
3001 | push fat16_root_end_write |
||
3002 | push fat16_root_next_write |
||
3003 | push fat16_root_begin_write |
||
3004 | xor ebp, ebp |
||
3005 | push ebp |
||
3006 | push ebp |
||
3007 | push fat16_root_first |
||
3008 | push fat16_root_next |
||
3009 | jmp .common1 |
||
3010 | .noroot: |
||
3011 | ; check existence |
||
3012 | mov byte [ebp], 0 |
||
3013 | call hd_find_lfn |
||
3014 | mov byte [ebp], '/' |
||
3015 | lea esi, [ebp+1] |
||
3016 | jnc @f |
||
3017 | mov eax, ERROR_FILE_NOT_FOUND |
||
3018 | .ret1: |
||
3019 | mov [esp+28], eax |
||
3020 | popad |
||
3021 | xor ebx, ebx |
||
3022 | ret |
||
3023 | @@: |
||
3024 | test byte [edi+11], 0x10 ; must be directory |
||
3025 | mov eax, ERROR_ACCESS_DENIED |
||
3026 | jz .ret1 |
||
3027 | mov ebp, [edi+20-2] |
||
3028 | mov bp, [edi+26] ; ebp=cluster |
||
3029 | mov eax, ERROR_FAT_TABLE |
||
3030 | cmp ebp, 2 |
||
3031 | jb .ret1 |
||
3032 | .pushnotroot: |
||
3033 | push fat_notroot_extend_dir |
||
3034 | push fat_notroot_end_write |
||
3035 | push fat_notroot_next_write |
||
3036 | push fat_notroot_begin_write |
||
3037 | push 0 |
||
3038 | push ebp |
||
3039 | push fat_notroot_first |
||
3040 | push fat_notroot_next |
||
3041 | .common1: |
||
3042 | call fat_find_lfn |
||
3043 | jc .notfound |
||
3044 | ; found; must not be directory |
||
3045 | test byte [edi+11], 10h |
||
3046 | jz @f |
||
3047 | add esp, 32 |
||
3048 | popad |
||
3049 | mov eax, ERROR_ACCESS_DENIED |
||
3050 | xor ebx, ebx |
||
3051 | ret |
||
3052 | @@: |
||
3053 | ; delete FAT chain |
||
3054 | push edi |
||
3055 | xor eax, eax |
||
3056 | mov dword [edi+28], eax ; zero size |
||
3057 | xor ecx, ecx |
||
3058 | mov eax, [edi+20-2] |
||
3059 | mov ax, [edi+26] |
||
3060 | mov word [edi+20], cx |
||
3061 | mov word [edi+26], cx |
||
3062 | test eax, eax |
||
3063 | jz .done1 |
||
3064 | @@: |
||
3065 | cmp eax, [fatRESERVED] |
||
3066 | jae .done1 |
||
3067 | push edx |
||
3068 | xor edx, edx |
||
3069 | call set_FAT |
||
3070 | mov eax, edx |
||
3071 | pop edx |
||
3072 | inc ecx |
||
3073 | jmp @b |
||
3074 | .done1: |
||
3075 | pop edi |
||
3076 | call get_time_for_file |
||
3077 | mov [edi+22], ax |
||
3078 | call get_date_for_file |
||
3079 | mov [edi+24], ax |
||
3080 | mov [edi+18], ax |
||
3081 | or byte [edi+11], 20h ; set 'archive' attribute |
||
3082 | jmp .doit |
||
3083 | .notfound: |
||
3084 | ; file is not found; generate short name |
||
3085 | call fat_name_is_legal |
||
3086 | jc @f |
||
3087 | add esp, 32 |
||
3088 | popad |
||
3089 | mov eax, ERROR_FILE_NOT_FOUND |
||
3090 | xor ebx, ebx |
||
3091 | ret |
||
3092 | @@: |
||
3093 | sub esp, 12 |
||
3094 | mov edi, esp |
||
3095 | call fat_gen_short_name |
||
3096 | .test_short_name_loop: |
||
3097 | push esi edi ecx |
||
3098 | mov esi, edi |
||
3099 | lea eax, [esp+12+12+8] |
||
3100 | mov [eax], ebp |
||
3101 | and dword [eax+4], 0 |
||
3102 | call dword [eax-4] |
||
3103 | jc .found |
||
3104 | .test_short_name_entry: |
||
3105 | cmp byte [edi+11], 0xF |
||
3106 | jz .test_short_name_cont |
||
3107 | mov ecx, 11 |
||
3108 | push esi edi |
||
3109 | repz cmpsb |
||
3110 | pop edi esi |
||
3111 | jz .short_name_found |
||
3112 | .test_short_name_cont: |
||
3113 | lea eax, [esp+12+12+8] |
||
3114 | call dword [eax-8] |
||
3115 | jnc .test_short_name_entry |
||
3116 | jmp .found |
||
3117 | .short_name_found: |
||
3118 | pop ecx edi esi |
||
3119 | call fat_next_short_name |
||
3120 | jnc .test_short_name_loop |
||
3121 | .disk_full: |
||
3122 | add esp, 12+32 |
||
3123 | popa |
||
3124 | mov eax, ERROR_DISK_FULL |
||
3125 | xor ebx, ebx |
||
3126 | ret |
||
3127 | .found: |
||
3128 | pop ecx edi esi |
||
3129 | ; now find space in directory |
||
3130 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
3131 | mov al, '~' |
||
3132 | push ecx edi |
||
3133 | mov ecx, 8 |
||
3134 | repnz scasb |
||
3135 | push 1 |
||
3136 | pop eax ; 1 entry |
||
3137 | jnz .notilde |
||
3138 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
3139 | xor eax, eax |
||
3140 | @@: |
||
3141 | cmp byte [esi], 0 |
||
3142 | jz @f |
||
3143 | inc esi |
||
3144 | inc eax |
||
3145 | jmp @b |
||
3146 | @@: |
||
3147 | sub esi, eax |
||
3148 | add eax, 12+13 |
||
3149 | mov ecx, 13 |
||
3150 | push edx |
||
3151 | cdq |
||
3152 | div ecx |
||
3153 | pop edx |
||
3154 | .notilde: |
||
3155 | push -1 |
||
3156 | push -1 |
||
3157 | push -1 |
||
3158 | ; find |
||
3159 | xor ecx, ecx |
||
3160 | push eax |
||
3161 | lea eax, [esp+16+8+12+8] |
||
3162 | mov [eax], ebp |
||
3163 | and dword [eax+4], 0 |
||
3164 | call dword [eax-4] |
||
3165 | pop eax |
||
3166 | jnc .scan_dir |
||
3167 | .fsfrfe3: |
||
3168 | add esp, 12+8+12+32 |
||
3169 | popad |
||
3170 | mov eax, 11 |
||
3171 | xor ebx, ebx |
||
3172 | ret |
||
3173 | .scan_dir: |
||
3174 | cmp byte [edi], 0 |
||
3175 | jz .free |
||
3176 | cmp byte [edi], 0xE5 |
||
3177 | jz .free |
||
3178 | xor ecx, ecx |
||
3179 | .scan_cont: |
||
3180 | push eax |
||
3181 | lea eax, [esp+16+8+12+8] |
||
3182 | call dword [eax-8] |
||
3183 | pop eax |
||
3184 | jnc .scan_dir |
||
3185 | cmp [hd_error], 0 |
||
3186 | jnz .fsfrfe3 |
||
3187 | push eax |
||
3188 | lea eax, [esp+16+8+12+8] |
||
3189 | call dword [eax+20] ; extend directory |
||
3190 | pop eax |
||
3191 | jnc .scan_dir |
||
3192 | add esp, 12+8+12+32 |
||
3193 | popad |
||
3194 | mov eax, ERROR_DISK_FULL |
||
3195 | xor ebx, ebx |
||
3196 | ret |
||
3197 | .free: |
||
3198 | test ecx, ecx |
||
3199 | jnz @f |
||
3200 | mov [esp], edi |
||
3201 | mov ecx, [esp+12+8+12+8] |
||
3202 | mov [esp+4], ecx |
||
3203 | mov ecx, [esp+12+8+12+12] |
||
3204 | mov [esp+8], ecx |
||
3205 | xor ecx, ecx |
||
3206 | @@: |
||
3207 | inc ecx |
||
3208 | cmp ecx, eax |
||
3209 | jb .scan_cont |
||
3210 | ; found! |
||
3211 | ; calculate name checksum |
||
3212 | push esi ecx |
||
3213 | mov esi, [esp+8+12] |
||
3214 | mov ecx, 11 |
||
3215 | xor eax, eax |
||
3216 | @@: |
||
3217 | ror al, 1 |
||
3218 | add al, [esi] |
||
3219 | inc esi |
||
3220 | loop @b |
||
3221 | pop ecx esi |
||
3222 | pop edi |
||
3223 | pop dword [esp+8+12+12] |
||
3224 | pop dword [esp+8+12+12] |
||
3225 | ; edi points to first entry in free chunk |
||
3226 | dec ecx |
||
3227 | jz .nolfn |
||
3228 | push esi |
||
3229 | push eax |
||
3230 | lea eax, [esp+8+8+12+8] |
||
3231 | call dword [eax+8] ; begin write |
||
3232 | mov al, 40h |
||
3233 | .writelfn: |
||
3234 | or al, cl |
||
3235 | mov esi, [esp+4] |
||
3236 | push ecx |
||
3237 | dec ecx |
||
3238 | imul ecx, 13 |
||
3239 | add esi, ecx |
||
3240 | stosb |
||
3241 | mov cl, 5 |
||
3242 | call fs_RamdiskRewrite.read_symbols |
||
3243 | mov ax, 0xF |
||
3244 | stosw |
||
3245 | mov al, [esp+4] |
||
3246 | stosb |
||
3247 | mov cl, 6 |
||
3248 | call fs_RamdiskRewrite.read_symbols |
||
3249 | xor eax, eax |
||
3250 | stosw |
||
3251 | mov cl, 2 |
||
3252 | call fs_RamdiskRewrite.read_symbols |
||
3253 | pop ecx |
||
3254 | lea eax, [esp+8+8+12+8] |
||
3255 | call dword [eax+12] ; next write |
||
3256 | xor eax, eax |
||
3257 | loop .writelfn |
||
3258 | pop eax |
||
3259 | pop esi |
||
3260 | ; lea eax, [esp+8+12+8] |
||
3261 | ; call dword [eax+16] ; end write |
||
3262 | .nolfn: |
||
3263 | xchg esi, [esp] |
||
3264 | mov ecx, 11 |
||
3265 | rep movsb |
||
3266 | mov word [edi], 20h ; attributes |
||
3267 | sub edi, 11 |
||
3268 | pop esi ecx |
||
3269 | add esp, 12 |
||
3270 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
3271 | call get_time_for_file |
||
3272 | mov [edi+14], ax ; creation time |
||
3273 | mov [edi+22], ax ; last write time |
||
3274 | call get_date_for_file |
||
3275 | mov [edi+16], ax ; creation date |
||
3276 | mov [edi+24], ax ; last write date |
||
3277 | mov [edi+18], ax ; last access date |
||
3278 | xor ecx, ecx |
||
3279 | mov word [edi+20], cx ; high word of cluster |
||
3280 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
3281 | mov dword [edi+28], ecx ; file size - to be filled |
||
3282 | .doit: |
||
3283 | lea eax, [esp+8] |
||
3284 | call dword [eax+16] ; flush directory |
||
3285 | push ecx |
||
3286 | mov ecx, [esp+4+32+24] |
||
3287 | push ecx |
||
3288 | push edi |
||
3289 | mov esi, edx |
||
3290 | test ecx, ecx |
||
3291 | jz .done |
||
3292 | mov eax, 2 |
||
3293 | call get_free_FAT |
||
3294 | jc .diskfull |
||
3295 | push eax |
||
3296 | mov [edi+26], ax |
||
3297 | shr eax, 16 |
||
3298 | mov [edi+20], ax |
||
3299 | lea eax, [esp+16+8] |
||
3300 | call dword [eax+16] ; flush directory |
||
3301 | pop eax |
||
3302 | push edx |
||
3303 | mov edx, [fatEND] |
||
3304 | call set_FAT |
||
3305 | pop edx |
||
3306 | .write_cluster: |
||
3307 | push eax |
||
3308 | dec eax |
||
3309 | dec eax |
||
3310 | mov ebp, [SECTORS_PER_CLUSTER] |
||
3311 | imul eax, ebp |
||
3312 | add eax, [DATA_START] |
||
3313 | ; write data |
||
3314 | .write_sector: |
||
3315 | mov ecx, 512 |
||
3316 | cmp dword [esp+8], ecx |
||
3317 | jb .writeshort |
||
3318 | ; we can write directly from given buffer |
||
3319 | mov ebx, esi |
||
3320 | add esi, ecx |
||
3321 | jmp .writecommon |
||
3322 | .writeshort: |
||
3323 | mov ecx, [esp+8] |
||
3324 | push ecx |
||
3325 | mov edi, buffer |
||
3326 | mov ebx, edi |
||
3327 | rep movsb |
||
3328 | mov ecx, buffer+0x200 |
||
3329 | sub ecx, edi |
||
3330 | push eax |
||
3331 | xor eax, eax |
||
3332 | rep stosb |
||
3333 | pop eax |
||
3334 | pop ecx |
||
3335 | .writecommon: |
||
3336 | call hd_write |
||
3337 | cmp [hd_error], 0 |
||
3338 | jnz .writeerr |
||
3339 | inc eax |
||
3340 | sub dword [esp+8], ecx |
||
3341 | jz .writedone |
||
3342 | dec ebp |
||
3343 | jnz .write_sector |
||
3344 | ; allocate new cluster |
||
3345 | pop eax |
||
3346 | mov ecx, eax |
||
3347 | call get_free_FAT |
||
3348 | jc .diskfull |
||
3349 | push edx |
||
3350 | mov edx, [fatEND] |
||
3351 | call set_FAT |
||
3352 | xchg eax, ecx |
||
3353 | mov edx, ecx |
||
3354 | call set_FAT |
||
3355 | pop edx |
||
3356 | xchg eax, ecx |
||
3357 | jmp .write_cluster |
||
3358 | .diskfull: |
||
3359 | mov eax, ERROR_DISK_FULL |
||
3360 | jmp .ret |
||
3361 | .writeerr: |
||
3362 | pop eax |
||
3363 | sub esi, ecx |
||
3364 | mov eax, 11 |
||
3365 | jmp .ret |
||
3366 | .writedone: |
||
3367 | pop eax |
||
3368 | .done: |
||
3369 | xor eax, eax |
||
3370 | .ret: |
||
3371 | pop edi ecx |
||
3372 | mov ebx, esi |
||
3373 | sub ebx, edx |
||
3374 | pop ebp |
||
3375 | mov [esp+32+28], eax |
||
3376 | lea eax, [esp+8] |
||
3377 | call dword [eax+8] |
||
3378 | mov [edi+28], ebx |
||
3379 | call dword [eax+16] |
||
3380 | mov [esp+32+16], ebx |
||
3381 | lea eax, [ebx+511] |
||
3382 | shr eax, 9 |
||
3383 | mov ecx, [SECTORS_PER_CLUSTER] |
||
3384 | lea eax, [eax+ecx-1] |
||
3385 | xor edx, edx |
||
3386 | div ecx |
||
3387 | mov ecx, ebp |
||
3388 | sub ecx, eax |
||
3389 | call add_disk_free_space |
||
3390 | add esp, 32 |
||
3391 | call update_disk |
||
3392 | popad |
||
3393 | ret |
||
3394 | |||
131 | diamond | 3395 | ;---------------------------------------------------------------- |
3396 | ; |
||
3397 | ; fs_HdWrite - LFN variant for writing to floppy |
||
3398 | ; |
||
3399 | ; esi points to filename |
||
3400 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
3401 | ; may be ebx=0 - start from first byte |
||
3402 | ; ecx number of bytes to write, 0+ |
||
3403 | ; edx mem location to data |
||
3404 | ; |
||
3405 | ; ret ebx = bytes written (maybe 0) |
||
3406 | ; eax = 0 ok write or other = errormsg |
||
3407 | ; |
||
3408 | ;-------------------------------------------------------------- |
||
3409 | fs_HdWrite.access_denied: |
||
3410 | push ERROR_ACCESS_DENIED |
||
3411 | fs_HdWrite.ret0: |
||
3412 | pop eax |
||
3413 | xor ebx, ebx |
||
3414 | ret |
||
3415 | |||
3416 | fs_HdWrite.ret11: |
||
3417 | push 11 |
||
3418 | jmp fs_HdWrite.ret0 |
||
3419 | |||
3420 | fs_HdWrite: |
||
3421 | cmp [fat_type], 0 |
||
3422 | jnz @f |
||
3423 | push ERROR_UNKNOWN_FS |
||
3424 | jmp .ret0 |
||
3425 | @@: |
||
3426 | cmp byte [esi], 0 |
||
3427 | jz .access_denied |
||
3428 | pushad |
||
3429 | call hd_find_lfn |
||
3430 | pushfd |
||
3431 | cmp [hd_error], 0 |
||
3432 | jz @f |
||
3433 | popfd |
||
3434 | popad |
||
3435 | push 11 |
||
3436 | jmp .ret0 |
||
3437 | @@: |
||
3438 | popfd |
||
3439 | jnc .found |
||
3440 | popad |
||
3441 | push ERROR_FILE_NOT_FOUND |
||
3442 | jmp .ret0 |
||
3443 | .found: |
||
3444 | ; FAT does not support files larger than 4GB |
||
3445 | test ebx, ebx |
||
3446 | jz .l1 |
||
3447 | cmp dword [ebx+4], 0 |
||
3448 | jz @f |
||
3449 | .eof: |
||
3450 | popad |
||
3451 | push ERROR_END_OF_FILE |
||
3452 | jmp .ret0 |
||
3453 | @@: |
||
3454 | mov ebx, [ebx] |
||
3455 | .l1: |
||
3456 | ; now edi points to direntry, ebx=start byte to write, |
||
3457 | ; ecx=number of bytes to write, edx=data pointer |
||
3458 | |||
3459 | ; extend file if needed |
||
3460 | add ecx, ebx |
||
3461 | jc .eof ; FAT does not support files larger than 4GB |
||
3462 | push eax ; save directory sector |
||
3463 | push 0 ; return value=0 |
||
3464 | |||
3465 | call get_time_for_file |
||
3466 | mov [edi+22], ax ; last write time |
||
3467 | call get_date_for_file |
||
3468 | mov [edi+24], ax ; last write date |
||
3469 | mov [edi+18], ax ; last access date |
||
3470 | |||
3471 | push dword [edi+28] ; save current file size |
||
3472 | cmp ecx, [edi+28] |
||
3473 | jbe .length_ok |
||
3474 | cmp ecx, ebx |
||
3475 | jz .length_ok |
||
3476 | call hd_extend_file |
||
3477 | jnc .length_ok |
||
3478 | mov [esp+4], eax |
||
3479 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
3480 | ; First two cases are fatal errors, in third case we may write some data |
||
3481 | cmp al, ERROR_DISK_FULL |
||
3482 | jz .disk_full |
||
3483 | pop eax |
||
3484 | pop eax |
||
3485 | mov [esp+4+28], eax |
||
3486 | pop eax |
||
3487 | popad |
||
3488 | xor ebx, ebx |
||
3489 | ret |
||
3490 | .disk_full: |
||
3491 | ; correct number of bytes to write |
||
3492 | mov ecx, [edi+28] |
||
3493 | cmp ecx, ebx |
||
3494 | ja .length_ok |
||
3495 | .ret: |
||
3496 | call update_disk |
||
3497 | cmp [hd_error], 0 |
||
3498 | jz @f |
||
3499 | mov byte [esp+4], 11 |
||
3500 | @@: |
||
3501 | pop eax |
||
3502 | pop eax |
||
3503 | mov [esp+4+28], eax ; eax=return value |
||
3504 | pop eax |
||
3505 | sub edx, [esp+20] |
||
3506 | mov [esp+16], edx ; ebx=number of written bytes |
||
3507 | popad |
||
3508 | ret |
||
3509 | .length_ok: |
||
3510 | mov esi, [edi+28] |
||
3511 | mov eax, [edi+20-2] |
||
3512 | mov ax, [edi+26] |
||
3513 | mov edi, eax ; edi=current cluster |
||
3514 | xor ebp, ebp ; ebp=current sector in cluster |
||
3515 | ; save directory |
||
3516 | mov eax, [esp+8] |
||
3517 | push ebx |
||
3518 | mov ebx, buffer |
||
3519 | call hd_write |
||
3520 | pop ebx |
||
3521 | cmp [hd_error], 0 |
||
3522 | jz @f |
||
3523 | .device_err: |
||
3524 | mov byte [esp+4], 11 |
||
3525 | jmp .ret |
||
3526 | @@: |
||
3527 | |||
3528 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
3529 | sub ecx, ebx |
||
3530 | jz .ret |
||
3531 | .write_loop: |
||
3532 | ; get length of data in current sector |
||
3533 | push ecx |
||
3534 | sub ebx, 0x200 |
||
3535 | jb .hasdata |
||
3536 | neg ebx |
||
3537 | xor ecx, ecx |
||
3538 | jmp @f |
||
3539 | .hasdata: |
||
3540 | neg ebx |
||
3541 | cmp ecx, ebx |
||
3542 | jbe @f |
||
3543 | mov ecx, ebx |
||
3544 | @@: |
||
3545 | ; get current sector number |
||
3546 | mov eax, edi |
||
3547 | dec eax |
||
3548 | dec eax |
||
3549 | imul eax, [SECTORS_PER_CLUSTER] |
||
3550 | add eax, [DATA_START] |
||
3551 | add eax, ebp |
||
3552 | ; load sector if needed |
||
3553 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
3554 | jz .noread |
||
3555 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
3556 | jz .noread |
||
3557 | cmp ecx, esi ; (same for the last sector) |
||
3558 | jz .noread |
||
3559 | push ebx |
||
3560 | mov ebx, buffer |
||
3561 | call hd_read |
||
3562 | pop ebx |
||
3563 | cmp [hd_error], 0 |
||
3564 | jz @f |
||
3565 | .device_err2: |
||
3566 | pop ecx |
||
3567 | jmp .device_err |
||
3568 | @@: |
||
3569 | .noread: |
||
3570 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
3571 | push eax ecx edi |
||
3572 | xor eax, eax |
||
3573 | mov ecx, 0x200 |
||
3574 | sub ecx, [esp+4+12] |
||
3575 | jbe @f |
||
3576 | mov edi, buffer |
||
3577 | add edi, [esp+4+12] |
||
3578 | rep stosb |
||
3579 | @@: |
||
3580 | ; zero uninitialized data in the last sector |
||
3581 | mov ecx, 0x200 |
||
3582 | sub ecx, esi |
||
3583 | jbe @f |
||
3584 | mov edi, buffer |
||
3585 | add edi, esi |
||
3586 | rep stosb |
||
3587 | @@: |
||
3588 | pop edi ecx eax |
||
3589 | ; copy new data |
||
3590 | push eax |
||
3591 | mov eax, edx |
||
3592 | neg ebx |
||
3593 | jecxz @f |
||
3594 | add ebx, buffer+0x200 |
||
3595 | call memmove |
||
3596 | xor ebx, ebx |
||
3597 | @@: |
||
3598 | pop eax |
||
3599 | ; save sector |
||
3600 | push ebx |
||
3601 | mov ebx, buffer |
||
3602 | call hd_write |
||
3603 | pop ebx |
||
3604 | cmp [hd_error], 0 |
||
3605 | jnz .device_err2 |
||
3606 | add edx, ecx |
||
3607 | sub [esp], ecx |
||
3608 | pop ecx |
||
3609 | jz .ret |
||
3610 | ; next sector |
||
3611 | inc ebp |
||
3612 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
3613 | jb @f |
||
3614 | xor ebp, ebp |
||
3615 | mov eax, edi |
||
3616 | call get_FAT |
||
3617 | mov edi, eax |
||
3618 | cmp [hd_error], 0 |
||
3619 | jnz .device_err |
||
3620 | @@: |
||
3621 | sub esi, 0x200 |
||
3622 | jae @f |
||
3623 | xor esi, esi |
||
3624 | @@: |
||
3625 | sub dword [esp], 0x200 |
||
3626 | jae @f |
||
3627 | and dword [esp], 0 |
||
3628 | @@: jmp .write_loop |
||
3629 | |||
3630 | hd_extend_file.zero_size: |
||
3631 | xor eax, eax |
||
3632 | jmp hd_extend_file.start_extend |
||
3633 | |||
3634 | ; extends file on hd to given size (new data area is undefined) |
||
3635 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 3636 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 3637 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
3638 | hd_extend_file: |
||
3639 | push ebp |
||
3640 | mov ebp, [SECTORS_PER_CLUSTER] |
||
3641 | imul ebp, [BYTES_PER_SECTOR] |
||
3642 | push ecx |
||
3643 | ; find the last cluster of file |
||
3644 | mov eax, [edi+20-2] |
||
3645 | mov ax, [edi+26] |
||
3646 | mov ecx, [edi+28] |
||
3647 | jecxz .zero_size |
||
3648 | .last_loop: |
||
3649 | sub ecx, ebp |
||
3650 | jbe .last_found |
||
3651 | call get_FAT |
||
3652 | cmp [hd_error], 0 |
||
3653 | jz @f |
||
3654 | .device_err: |
||
3655 | pop ecx |
||
3656 | .device_err2: |
||
3657 | pop ebp |
||
3658 | push 11 |
||
3659 | .ret_err: |
||
3660 | pop eax |
||
3661 | stc |
||
3662 | ret |
||
3663 | @@: |
||
3664 | cmp eax, 2 |
||
3665 | jb .fat_err |
||
3666 | cmp eax, [fatRESERVED] |
||
3667 | jb .last_loop |
||
3668 | .fat_err: |
||
3669 | pop ecx ebp |
||
3670 | push ERROR_FAT_TABLE |
||
3671 | jmp .ret_err |
||
3672 | .last_found: |
||
3673 | push eax |
||
3674 | call get_FAT |
||
3675 | cmp [hd_error], 0 |
||
3676 | jz @f |
||
3677 | pop eax |
||
3678 | jmp .device_err |
||
3679 | @@: |
||
3680 | cmp eax, [fatRESERVED] |
||
3681 | pop eax |
||
3682 | jb .fat_err |
||
3683 | ; set length to full number of clusters |
||
3684 | sub [edi+28], ecx |
||
3685 | .start_extend: |
||
3686 | pop ecx |
||
3687 | ; now do extend |
||
3688 | push edx |
||
3689 | mov edx, 2 ; start scan from cluster 2 |
||
3690 | .extend_loop: |
||
3691 | cmp [edi+28], ecx |
||
3692 | jae .extend_done |
||
3693 | ; add new cluster |
||
3694 | push eax |
||
3695 | mov eax, edx |
||
3696 | call get_free_FAT |
||
3697 | jc .disk_full |
||
3698 | mov edx, [fatEND] |
||
3699 | call set_FAT |
||
3700 | mov edx, eax |
||
3701 | pop eax |
||
3702 | test eax, eax |
||
3703 | jz .first_cluster |
||
3704 | push edx |
||
3705 | call set_FAT |
||
3706 | pop edx |
||
3707 | jmp @f |
||
3708 | .first_cluster: |
||
3709 | ror edx, 16 |
||
3710 | mov [edi+20], dx |
||
3711 | ror edx, 16 |
||
3712 | mov [edi+26], dx |
||
3713 | @@: |
||
133 | diamond | 3714 | push ecx |
3715 | mov ecx, -1 |
||
3716 | call add_disk_free_space |
||
3717 | pop ecx |
||
131 | diamond | 3718 | mov eax, edx |
3719 | cmp [hd_error], 0 |
||
3720 | jnz .device_err3 |
||
3721 | add [edi+28], ebp |
||
3722 | jmp .extend_loop |
||
3723 | .extend_done: |
||
3724 | mov [edi+28], ecx |
||
3725 | pop edx ebp |
||
133 | diamond | 3726 | xor eax, eax ; CF=0 |
131 | diamond | 3727 | ret |
3728 | .device_err3: |
||
3729 | pop edx |
||
3730 | jmp .device_err2 |
||
3731 | .disk_full: |
||
3732 | pop eax edx ebp |
||
3733 | push ERROR_DISK_FULL |
||
3734 | pop eax |
||
3735 | cmp [hd_error], 0 |
||
3736 | jz @f |
||
3737 | mov al, 11 |
||
3738 | @@: stc |
||
3739 | ret |
||
3740 | |||
133 | diamond | 3741 | ;---------------------------------------------------------------- |
3742 | ; |
||
3743 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
3744 | ; |
||
3745 | ; esi points to filename |
||
3746 | ; ebx points to 64-bit number = new file size |
||
3747 | ; ecx ignored (reserved) |
||
3748 | ; edx ignored (reserved) |
||
3749 | ; |
||
3750 | ; ret eax = 0 ok or other = errormsg |
||
3751 | ; |
||
3752 | ;-------------------------------------------------------------- |
||
3753 | fs_HdSetFileEnd: |
||
3754 | cmp [fat_type], 0 |
||
3755 | jnz @f |
||
3756 | push ERROR_UNKNOWN_FS |
||
3757 | .ret: |
||
3758 | pop eax |
||
3759 | ret |
||
3760 | @@: |
||
3761 | cmp byte [esi], 0 |
||
3762 | jnz @f |
||
3763 | .access_denied: |
||
3764 | push ERROR_ACCESS_DENIED |
||
3765 | jmp .ret |
||
3766 | @@: |
||
3767 | push edi |
||
3768 | call hd_find_lfn |
||
3769 | pushfd |
||
3770 | cmp [hd_error], 0 |
||
3771 | jz @f |
||
3772 | popfd |
||
3773 | push 11 |
||
3774 | jmp .ret |
||
3775 | @@: |
||
3776 | popfd |
||
3777 | jnc @f |
||
3778 | pop edi |
||
3779 | push ERROR_FILE_NOT_FOUND |
||
3780 | jmp .ret |
||
3781 | @@: |
||
3782 | ; must not be directory |
||
3783 | test byte [edi+11], 10h |
||
3784 | jz @f |
||
3785 | pop edi |
||
3786 | jmp .access_denied |
||
3787 | @@: |
||
3788 | ; file size must not exceed 4 Gb |
||
3789 | cmp dword [ebx+4], 0 |
||
3790 | jz @f |
||
3791 | pop edi |
||
3792 | push ERROR_END_OF_FILE |
||
3793 | jmp .ret |
||
3794 | @@: |
||
3795 | push eax ; save directory sector |
||
3796 | ; set file modification date/time to current |
||
3797 | call fat_update_datetime |
||
3798 | mov eax, [ebx] |
||
3799 | cmp eax, [edi+28] |
||
3800 | jb .truncate |
||
3801 | ja .expand |
||
3802 | pop eax |
||
3803 | mov ebx, buffer |
||
3804 | call hd_write |
||
3805 | pop edi |
||
3806 | xor eax, eax |
||
3807 | cmp [hd_error], 0 |
||
3808 | jz @f |
||
3809 | mov al, 11 |
||
3810 | @@: |
||
3811 | ret |
||
3812 | .expand: |
||
3813 | push ebx ebp ecx |
||
3814 | push dword [edi+28] ; save old size |
||
3815 | mov ecx, eax |
||
3816 | call hd_extend_file |
||
3817 | push eax ; return code |
||
3818 | jnc .expand_ok |
||
3819 | cmp al, ERROR_DISK_FULL |
||
3820 | jz .disk_full |
||
3821 | .pop_ret: |
||
3822 | call update_disk |
||
3823 | pop eax ecx ebp ebx ecx edi edi |
||
3824 | ret |
||
3825 | .expand_ok: |
||
3826 | .disk_full: |
||
3827 | ; save directory |
||
3828 | mov eax, [edi+28] |
||
3829 | xchg eax, [esp+20] |
||
3830 | mov ebx, buffer |
||
3831 | call hd_write |
||
3832 | mov eax, [edi+20-2] |
||
3833 | mov ax, [edi+26] |
||
3834 | mov edi, eax |
||
3835 | cmp [hd_error], 0 |
||
3836 | jz @f |
||
3837 | .pop_ret11: |
||
3838 | mov byte [esp], 11 |
||
3839 | jmp .pop_ret |
||
3840 | @@: |
||
3841 | ; now zero new data |
||
3842 | xor ebp, ebp |
||
3843 | ; edi=current cluster, ebp=sector in cluster |
||
3844 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
||
3845 | .zero_loop: |
||
3846 | sub dword [esp+4], 0x200 |
||
3847 | jae .next_cluster |
||
3848 | lea eax, [edi-2] |
||
3849 | imul eax, [SECTORS_PER_CLUSTER] |
||
3850 | add eax, [DATA_START] |
||
3851 | add eax, ebp |
||
3852 | cmp dword [esp+4], -0x200 |
||
3853 | jz .noread |
||
3854 | mov ebx, buffer |
||
3855 | call hd_read |
||
3856 | cmp [hd_error], 0 |
||
3857 | jnz .err_next |
||
3858 | .noread: |
||
3859 | mov ecx, [esp+4] |
||
3860 | neg ecx |
||
3861 | push edi |
||
3862 | mov edi, buffer+0x200 |
||
3863 | add edi, [esp+8] |
||
3864 | push eax |
||
3865 | xor eax, eax |
||
3866 | mov [esp+12], eax |
||
3867 | rep stosb |
||
3868 | pop eax |
||
3869 | pop edi |
||
3870 | call hd_write |
||
3871 | cmp [hd_error], 0 |
||
3872 | jz .next_cluster |
||
3873 | .err_next: |
||
3874 | mov byte [esp], 11 |
||
3875 | .next_cluster: |
||
3876 | sub dword [esp+20], 0x200 |
||
3877 | jbe .pop_ret |
||
3878 | inc ebp |
||
3879 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
3880 | jb .zero_loop |
||
3881 | xor ebp, ebp |
||
3882 | mov eax, edi |
||
3883 | call get_FAT |
||
3884 | mov edi, eax |
||
3885 | cmp [hd_error], 0 |
||
3886 | jnz .pop_ret11 |
||
3887 | jmp .zero_loop |
||
3888 | .truncate: |
||
3889 | mov [edi+28], eax |
||
3890 | push ecx |
||
3891 | mov ecx, [edi+20-2] |
||
3892 | mov cx, [edi+26] |
||
3893 | push eax |
||
3894 | test eax, eax |
||
3895 | jz .zero_size |
||
3896 | ; find new last cluster |
||
3897 | @@: |
||
3898 | mov eax, [SECTORS_PER_CLUSTER] |
||
3899 | shl eax, 9 |
||
3900 | sub [esp], eax |
||
3901 | jbe @f |
||
3902 | mov eax, ecx |
||
3903 | call get_FAT |
||
3904 | mov ecx, eax |
||
3905 | cmp [hd_error], 0 |
||
3906 | jz @b |
||
3907 | .device_err3: |
||
3908 | pop eax ecx eax edi |
||
3909 | push 11 |
||
3910 | pop eax |
||
3911 | ret |
||
3912 | @@: |
||
3913 | ; we will zero data at the end of last sector - remember it |
||
3914 | push ecx |
||
3915 | ; terminate FAT chain |
||
3916 | push edx |
||
3917 | mov eax, ecx |
||
3918 | mov edx, [fatEND] |
||
3919 | call set_FAT |
||
3920 | mov eax, edx |
||
3921 | pop edx |
||
3922 | cmp [hd_error], 0 |
||
3923 | jz @f |
||
3924 | .device_err4: |
||
3925 | pop ecx |
||
3926 | jmp .device_err3 |
||
3927 | .zero_size: |
||
3928 | and word [edi+20], 0 |
||
3929 | and word [edi+26], 0 |
||
3930 | push 0 |
||
3931 | mov eax, ecx |
||
3932 | @@: |
||
3933 | ; delete FAT chain |
||
3934 | call clear_cluster_chain |
||
3935 | cmp [hd_error], 0 |
||
3936 | jnz .device_err4 |
||
3937 | ; save directory |
||
3938 | mov eax, [esp+12] |
||
3939 | push ebx |
||
3940 | mov ebx, buffer |
||
3941 | call hd_write |
||
3942 | pop ebx |
||
3943 | cmp [hd_error], 0 |
||
3944 | jnz .device_err4 |
||
3945 | ; zero last sector, ignore errors |
||
3946 | pop ecx |
||
3947 | pop eax |
||
3948 | dec ecx |
||
3949 | imul ecx, [SECTORS_PER_CLUSTER] |
||
3950 | add ecx, [DATA_START] |
||
3951 | push eax |
||
3952 | sar eax, 9 |
||
3953 | add ecx, eax |
||
3954 | pop eax |
||
3955 | and eax, 0x1FF |
||
3956 | jz .truncate_done |
||
3957 | push ebx eax |
||
3958 | mov eax, ecx |
||
3959 | mov ebx, buffer |
||
3960 | call hd_read |
||
3961 | pop eax |
||
3962 | lea edi, [buffer+eax] |
||
3963 | push ecx |
||
3964 | mov ecx, 0x200 |
||
3965 | sub ecx, eax |
||
3966 | xor eax, eax |
||
3967 | rep stosb |
||
3968 | pop eax |
||
3969 | call hd_write |
||
3970 | pop ebx |
||
3971 | .truncate_done: |
||
3972 | pop ecx eax edi |
||
3973 | call update_disk |
||
3974 | xor eax, eax |
||
3975 | cmp [hd_error], 0 |
||
3976 | jz @f |
||
3977 | mov al, 11 |
||
3978 | @@: |
||
3979 | ret |
||
3980 | |||
129 | mikedld | 3981 | fs_HdGetFileInfo: |
3982 | cmp [fat_type], 0 |
||
3983 | jnz @f |
||
3984 | mov eax, ERROR_UNKNOWN_FS |
||
3985 | ret |
||
3986 | @@: |
||
3987 | cmp byte [esi], 0 |
||
3988 | jnz @f |
||
3989 | mov eax, 2 |
||
3990 | ret |
||
3991 | @@: |
||
3992 | push edi |
||
3993 | call hd_find_lfn |
||
3994 | pushfd |
||
3995 | cmp [hd_error], 0 |
||
3996 | jz @f |
||
3997 | popfd |
||
3998 | pop edi |
||
3999 | mov eax, 11 |
||
4000 | ret |
||
4001 | @@: |
||
4002 | popfd |
||
4003 | jmp fs_GetFileInfo_finish |
||
4004 | |||
4005 | fs_HdSetFileInfo: |
||
4006 | cmp [fat_type], 0 |
||
4007 | jnz @f |
||
4008 | mov eax, ERROR_UNKNOWN_FS |
||
4009 | ret |
||
4010 | @@: |
||
4011 | cmp byte [esi], 0 |
||
4012 | jnz @f |
||
4013 | mov eax, 2 |
||
4014 | ret |
||
4015 | @@: |
||
4016 | push edi |
||
4017 | call hd_find_lfn |
||
4018 | pushfd |
||
4019 | cmp [hd_error], 0 |
||
4020 | jz @f |
||
4021 | popfd |
||
4022 | pop edi |
||
4023 | mov eax, 11 |
||
4024 | ret |
||
4025 | @@: |
||
4026 | popfd |
||
4027 | jnc @f |
||
4028 | pop edi |
||
4029 | mov eax, ERROR_FILE_NOT_FOUND |
||
4030 | ret |
||
4031 | @@: |
||
4032 | push eax |
||
4033 | call bdfe_to_fat_entry |
||
4034 | pop eax |
||
4035 | mov ebx, buffer |
||
4036 | call hd_write |
||
4037 | call update_disk |
||
4038 | pop edi |
||
4039 | xor eax, eax |
||
4040 | ret |
||
4041 | |||
4042 | ;---------------------------------------------------------------- |
||
4043 | ; |
||
4044 | ; fs_HdExecute - LFN variant for executing from harddisk |
||
4045 | ; |
||
4046 | ; esi points to hd filename (e.g. 'dir1/name') |
||
4047 | ; ebp points to full filename (e.g. '/hd0/1/dir1/name') |
||
4048 | ; dword [ebx] = flags |
||
4049 | ; dword [ebx+4] = cmdline |
||
4050 | ; |
||
4051 | ; ret ebx,edx destroyed |
||
4052 | ; eax > 0 - PID, < 0 - error |
||
4053 | ; |
||
4054 | ;-------------------------------------------------------------- |
||
4055 | fs_HdExecute: |
||
4056 | mov edx, [ebx] |
||
4057 | mov ebx, [ebx+4] |
||
4058 | test ebx, ebx |
||
4059 | jz @f |
||
4060 | add ebx, std_application_base_address |
||
4061 | @@: |
||
4062 | |||
4063 | ;---------------------------------------------------------------- |
||
4064 | ; |
||
4065 | ; fs_HdExecute.flags - second entry |
||
4066 | ; |
||
4067 | ; esi points to floppy filename (kernel address) |
||
4068 | ; ebp points to full filename |
||
4069 | ; edx flags |
||
4070 | ; ebx cmdline (kernel address) |
||
4071 | ; |
||
4072 | ; ret eax > 0 - PID, < 0 - error |
||
4073 | ; |
||
4074 | ;-------------------------------------------------------------- |
||
4075 | |||
4076 | .flags: |
||
4077 | cmp [fat_type], 0 |
||
4078 | jnz @f |
||
4079 | mov eax, ERROR_UNKNOWN_FS |
||
4080 | ret |
||
4081 | @@: |
||
4082 | cmp byte [esi], 0 |
||
4083 | jnz @f |
||
4084 | ; cannot execute root! |
||
4085 | mov eax, -ERROR_ACCESS_DENIED |
||
4086 | ret |
||
4087 | @@: |
||
4088 | push edi |
||
4089 | call hd_find_lfn |
||
4090 | jnc .found |
||
4091 | pop edi |
||
4092 | mov eax, -ERROR_FILE_NOT_FOUND |
||
4093 | cmp [hd_error], 0 |
||
4094 | jz @f |
||
4095 | mov al, -11 |
||
4096 | @@: |
||
4097 | ret |
||
4098 | .found: |
||
4099 | mov eax, [edi+20-2] |
||
4100 | mov ax, [edi+26] |
||
4101 | push 0 |
||
4102 | push eax |
||
4103 | push dword [edi+28] ; size |
||
4104 | push .DoRead |
||
4105 | call fs_execute |
||
4106 | add esp, 16 |
||
4107 | pop edi |
||
4108 | ret |
||
4109 | |||
4110 | .DoRead: |
||
4111 | ; read next block |
||
4112 | ; in: eax->parameters, edi->buffer |
||
4113 | ; out: eax = error code |
||
4114 | pushad |
||
4115 | cmp dword [eax], 0 ; file size |
||
4116 | jz .eof |
||
4117 | add eax, 4 |
||
4118 | call fat_get_sector |
||
4119 | mov ebx, edi |
||
4120 | call hd_read |
||
4121 | cmp [hd_error], 0 |
||
4122 | jnz .err |
||
4123 | mov eax, [esp+28] |
||
4124 | mov ecx, [eax] |
||
4125 | sub ecx, 512 |
||
4126 | jae @f |
||
4127 | lea edi, [edi+ecx+512] |
||
4128 | neg ecx |
||
4129 | push eax |
||
4130 | xor eax, eax |
||
4131 | rep stosb |
||
4132 | pop eax |
||
4133 | @@: |
||
4134 | mov [eax], ecx |
||
4135 | mov edx, [eax+8] |
||
4136 | inc edx |
||
4137 | cmp edx, [SECTORS_PER_CLUSTER] |
||
4138 | jb @f |
||
4139 | push eax |
||
4140 | mov eax, [eax+4] |
||
4141 | call get_FAT |
||
4142 | cmp [hd_error], 0 |
||
4143 | jnz .err |
||
4144 | mov ecx, eax |
||
4145 | pop eax |
||
4146 | mov [eax+4], ecx |
||
4147 | xor edx, edx |
||
4148 | @@: |
||
4149 | mov [eax+8], edx |
||
4150 | popad |
||
4151 | xor eax, eax |
||
4152 | ret |
||
4153 | .eof: |
||
4154 | popad |
||
4155 | mov eax, 6 |
||
4156 | ret |
||
4157 | .err: |
||
4158 | popad |
||
4159 | mov eax, 11 |
||
4160 | ret |
||
4161 | |||
4162 | ; \end{diamond}>>=>=>>>> |