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Rev | Author | Line No. | Line |
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1 | ha | 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 ;; |
1 | ha | 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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321 | diamond | 10 | ;; 04.02.2007 LFN create folder - diamond ;; |
171 | diamond | 11 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
139 | diamond | 12 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
131 | diamond | 13 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
91 | diamond | 14 | ;; 23.06.2006 LFN start application - diamond ;; |
86 | diamond | 15 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
83 | diamond | 16 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
75 | diamond | 17 | ;; 04.05.2006 LFN read folder - diamond ;; |
74 | mario79 | 18 | ;; 29.04.2006 Elimination of hangup after the ;; |
379 | serge | 19 | ;; expiration hd_wait_timeout - Mario79 ;; |
75 | diamond | 20 | ;; 23.04.2006 LFN read file - diamond ;; |
65 | mario79 | 21 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
22 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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1 | ha | 23 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
24 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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25 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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26 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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27 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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28 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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29 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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30 | ;; 08.11.2004 rename - ATV ;; |
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31 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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32 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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33 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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34 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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35 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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36 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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37 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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38 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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39 | ;; 20.5.2002 Hd status check - VT ;; |
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40 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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41 | ;; ;; |
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42 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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43 | |||
44 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
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45 | |||
52 | mikedld | 46 | ERROR_SUCCESS = 0 |
47 | ERROR_DISK_BASE = 1 |
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48 | ERROR_UNSUPPORTED_FS = 2 |
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49 | ERROR_UNKNOWN_FS = 3 |
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50 | ERROR_PARTITION = 4 |
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51 | ERROR_FILE_NOT_FOUND = 5 |
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52 | ERROR_END_OF_FILE = 6 |
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53 | ERROR_MEMORY_POINTER = 7 |
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54 | ERROR_DISK_FULL = 8 |
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55 | ERROR_FAT_TABLE = 9 |
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56 | ERROR_ACCESS_DENIED = 10 |
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1 | ha | 57 | |
58 | PUSHAD_EAX equ [esp+28] |
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59 | PUSHAD_ECX equ [esp+24] |
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60 | PUSHAD_EDX equ [esp+20] |
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61 | PUSHAD_EBX equ [esp+16] |
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62 | PUSHAD_EBP equ [esp+8] |
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63 | PUSHAD_ESI equ [esp+4] |
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64 | PUSHAD_EDI equ [esp+0] |
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65 | |||
171 | diamond | 66 | uglobal |
67 | align 4 |
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1 | ha | 68 | cluster dd 0 ; used by file_write,makedir,append |
69 | partition_count dd 0 ; partitions found by set_FAT32_variables |
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70 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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71 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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72 | |||
73 | hd_error dd 0 ; set by wait_for_sector_buffer |
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74 | hd_setup dd 0 |
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75 | hd_wait_timeout dd 0 |
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76 | |||
77 | cluster_tmp dd 0 ; used by analyze_directory |
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78 | ; and analyze_directory_to_write |
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79 | |||
80 | file_size dd 0 ; used by file_read |
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81 | |||
82 | sector_tmp dd 0 ; used by rename,append,file_write |
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83 | entry_pos dd 0 ; used by rename,append,file_write |
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84 | |||
85 | old_filesize dd 0 ; used by append |
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86 | new_filepos dd 0 ; used by append |
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87 | bytes2write dd 0 ; used by append |
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88 | |||
89 | cache_search_start dd 0 ; used by find_empty_slot |
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171 | diamond | 90 | endg |
1 | ha | 91 | |
171 | diamond | 92 | iglobal |
1 | ha | 93 | fat_in_cache dd -1 |
171 | diamond | 94 | endg |
1 | ha | 95 | |
96 | uglobal |
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171 | diamond | 97 | align 4 |
98 | fat_cache: times 512 db 0 |
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1 | ha | 99 | Sector512: ; label for dev_hdcd.inc |
100 | buffer: times 512 db 0 |
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133 | diamond | 101 | fsinfo_buffer: times 512 db 0 |
1 | ha | 102 | endg |
103 | |||
104 | uglobal |
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105 | dir_entry: times 32 db 0 |
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106 | |||
107 | startpath: times 255 db 0 |
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108 | |||
109 | fat16_root db 0 ; flag for fat16 rootdir |
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110 | fat_change db 0 ; 1=fat has changed |
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111 | |||
112 | endg |
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113 | |||
114 | reserve_hd1: |
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115 | |||
116 | cli |
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117 | cmp [hd1_status],0 |
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118 | je reserve_ok1 |
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119 | |||
120 | sti |
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121 | call change_task |
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122 | jmp reserve_hd1 |
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123 | |||
124 | reserve_ok1: |
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125 | |||
126 | push eax |
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379 | serge | 127 | mov eax,[CURRENT_TASK] |
1 | ha | 128 | shl eax,5 |
379 | serge | 129 | mov eax,[eax+CURRENT_TASK+TASKDATA.pid] |
1 | ha | 130 | mov [hd1_status],eax |
131 | pop eax |
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132 | sti |
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133 | ret |
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95 | mario79 | 134 | ;******************************************** |
321 | diamond | 135 | |
136 | uglobal |
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137 | hd_in_cache db ? |
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138 | endg |
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139 | |||
95 | mario79 | 140 | reserve_hd_channel: |
141 | cmp [hdbase], 0x1F0 |
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142 | jne .IDE_Channel_2 |
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143 | .IDE_Channel_1: |
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144 | cli |
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145 | cmp [IDE_Channel_1],0 |
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146 | je .reserve_ok_1 |
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147 | sti |
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148 | call change_task |
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149 | jmp .IDE_Channel_1 |
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150 | .IDE_Channel_2: |
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151 | cli |
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152 | cmp [IDE_Channel_2],0 |
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153 | je .reserve_ok_2 |
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154 | sti |
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155 | call change_task |
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321 | diamond | 156 | jmp .IDE_Channel_2 |
95 | mario79 | 157 | .reserve_ok_1: |
321 | diamond | 158 | mov [IDE_Channel_1], 1 |
159 | push eax |
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160 | mov al, 1 |
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161 | jmp @f |
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95 | mario79 | 162 | .reserve_ok_2: |
321 | diamond | 163 | mov [IDE_Channel_2], 1 |
164 | push eax |
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165 | mov al, 3 |
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166 | @@: |
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167 | cmp [hdid], 1 |
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168 | sbb al, -1 |
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169 | cmp al, [hd_in_cache] |
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170 | jz @f |
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171 | mov [hd_in_cache], al |
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172 | call clear_hd_cache |
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173 | @@: |
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174 | pop eax |
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175 | ret |
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176 | |||
95 | mario79 | 177 | free_hd_channel: |
178 | cmp [hdbase], 0x1F0 |
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179 | jne .IDE_Channel_2 |
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180 | .IDE_Channel_1: |
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181 | mov [IDE_Channel_1],0 |
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182 | ret |
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183 | .IDE_Channel_2: |
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184 | mov [IDE_Channel_2],0 |
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185 | ret |
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186 | ;******************************************** |
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379 | serge | 187 | problem_partition db 0 ; used for partitions search |
1 | ha | 188 | |
65 | mario79 | 189 | include 'part_set.inc' |
1 | ha | 190 | |
191 | set_FAT: |
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192 | ;-------------------------------- |
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193 | ; input : EAX = cluster |
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194 | ; EDX = value to save |
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195 | ; output : EDX = old value |
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196 | ;-------------------------------- |
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197 | push eax ebx esi |
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198 | |||
199 | cmp eax,2 |
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200 | jb sfc_error |
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201 | cmp eax,[LAST_CLUSTER] |
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202 | ja sfc_error |
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256 | diamond | 203 | cmp [fs_type],16 |
1 | ha | 204 | je sfc_1 |
205 | add eax,eax |
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206 | sfc_1: |
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207 | add eax,eax |
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208 | mov esi,511 |
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209 | and esi,eax ; esi = position in fat sector |
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210 | shr eax,9 ; eax = fat sector |
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211 | add eax,[FAT_START] |
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212 | mov ebx,fat_cache |
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213 | |||
214 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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215 | je sfc_in_cache ; yes |
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216 | |||
217 | cmp [fat_change],0 ; is fat changed? |
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218 | je sfc_no_change ; no |
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219 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 220 | cmp [hd_error],0 |
221 | jne sfc_error |
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1 | ha | 222 | |
223 | sfc_no_change: |
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224 | mov [fat_in_cache],eax ; save fat sector |
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225 | call hd_read |
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74 | mario79 | 226 | cmp [hd_error],0 |
227 | jne sfc_error |
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1 | ha | 228 | |
379 | serge | 229 | |
1 | ha | 230 | sfc_in_cache: |
256 | diamond | 231 | cmp [fs_type],16 |
1 | ha | 232 | jne sfc_test32 |
233 | |||
234 | sfc_set16: |
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235 | xchg [ebx+esi],dx ; save new value and get old value |
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236 | jmp sfc_write |
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237 | |||
238 | sfc_test32: |
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239 | mov eax,[fatMASK] |
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240 | |||
241 | sfc_set32: |
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242 | and edx,eax |
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243 | xor eax,-1 ; mask for high bits |
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244 | and eax,[ebx+esi] ; get high 4 bits |
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245 | or eax,edx |
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246 | mov edx,[ebx+esi] ; get old value |
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247 | mov [ebx+esi],eax ; save new value |
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248 | |||
249 | sfc_write: |
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250 | mov [fat_change],1 ; fat has changed |
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251 | |||
252 | sfc_nonzero: |
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253 | and edx,[fatMASK] |
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254 | |||
255 | sfc_error: |
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256 | pop esi ebx eax |
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257 | ret |
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258 | |||
259 | |||
260 | get_FAT: |
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261 | ;-------------------------------- |
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262 | ; input : EAX = cluster |
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263 | ; output : EAX = next cluster |
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264 | ;-------------------------------- |
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265 | push ebx esi |
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266 | |||
256 | diamond | 267 | cmp [fs_type],16 |
1 | ha | 268 | je gfc_1 |
269 | add eax,eax |
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270 | gfc_1: |
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271 | add eax,eax |
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272 | mov esi,511 |
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273 | and esi,eax ; esi = position in fat sector |
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274 | shr eax,9 ; eax = fat sector |
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275 | add eax,[FAT_START] |
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276 | mov ebx,fat_cache |
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277 | |||
278 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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279 | je gfc_in_cache |
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280 | |||
281 | cmp [fat_change],0 ; is fat changed? |
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282 | je gfc_no_change ; no |
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283 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 284 | cmp [hd_error],0 |
285 | jne hd_error_01 |
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1 | ha | 286 | |
287 | gfc_no_change: |
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288 | mov [fat_in_cache],eax |
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289 | call hd_read |
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74 | mario79 | 290 | cmp [hd_error],0 |
291 | jne hd_error_01 |
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1 | ha | 292 | |
293 | gfc_in_cache: |
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294 | mov eax,[ebx+esi] |
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295 | and eax,[fatMASK] |
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74 | mario79 | 296 | hd_error_01: |
1 | ha | 297 | pop esi ebx |
298 | ret |
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299 | |||
300 | |||
301 | get_free_FAT: |
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302 | ;----------------------------------------------------------- |
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303 | ; input : EAX = # cluster for start the searching |
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304 | ; output : if CARRY=0 EAX = # first cluster found free |
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305 | ; if CARRY=1 disk full |
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306 | ; Note : for more speed need to use fat_cache directly |
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307 | ;----------------------------------------------------------- |
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308 | push ecx |
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309 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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310 | sub ecx,2 |
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311 | |||
312 | gff_test: |
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313 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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314 | jbe gff_in_range |
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315 | mov eax,2 |
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316 | |||
317 | gff_in_range: |
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318 | push eax |
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319 | call get_FAT ; get cluster state |
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74 | mario79 | 320 | cmp [hd_error],0 |
321 | jne gff_not_found_1 |
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322 | |||
1 | ha | 323 | test eax,eax ; is it free? |
324 | pop eax |
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325 | je gff_found ; yes |
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326 | inc eax ; next cluster |
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327 | dec ecx ; is all checked? |
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328 | jns gff_test ; no |
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329 | |||
74 | mario79 | 330 | gff_not_found_1: |
331 | add esp,4 |
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1 | ha | 332 | gff_not_found: |
333 | pop ecx ; yes. disk is full |
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334 | stc |
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335 | ret |
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336 | |||
337 | gff_found: |
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338 | pop ecx |
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339 | clc |
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340 | ret |
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341 | |||
342 | |||
343 | write_fat_sector: |
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344 | ;----------------------------------------------------------- |
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345 | ; write changed fat to disk |
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346 | ;----------------------------------------------------------- |
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347 | push eax ebx ecx |
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348 | |||
349 | mov [fat_change],0 |
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350 | mov eax,[fat_in_cache] |
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351 | cmp eax,-1 |
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352 | jz write_fat_not_used |
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353 | mov ebx,fat_cache |
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354 | mov ecx,[NUMBER_OF_FATS] |
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355 | |||
356 | write_next_fat: |
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357 | call hd_write |
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74 | mario79 | 358 | cmp [hd_error],0 |
359 | jne write_fat_not_used |
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360 | |||
1 | ha | 361 | add eax,[SECTORS_PER_FAT] |
362 | dec ecx |
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363 | jnz write_next_fat |
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364 | |||
365 | write_fat_not_used: |
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366 | pop ecx ebx eax |
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367 | ret |
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368 | |||
369 | |||
370 | analyze_directory: |
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371 | ;----------------------------------------------------------- |
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372 | ; input : EAX = first cluster of the directory |
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373 | ; EBX = pointer to filename |
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374 | ; output : IF CARRY=0 EAX = sector where th file is found |
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375 | ; EBX = pointer in buffer |
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376 | ; [buffer .. buffer+511] |
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377 | ; ECX,EDX,ESI,EDI not changed |
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378 | ; IF CARRY=1 filename not found |
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379 | ; Note : if cluster=0 it's changed to read rootdir |
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380 | ; save 2 previous directory sectors in longname_sec |
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381 | ;----------------------------------------------------------- |
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382 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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383 | mov [longname_sec1],0 |
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384 | mov [longname_sec2],0 |
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385 | |||
386 | adr_new_cluster: |
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387 | mov [cluster_tmp],eax |
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388 | mov [fat16_root],0 |
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389 | cmp eax,[LAST_CLUSTER] |
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390 | ja adr_not_found ; too big cluster number, something is wrong |
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391 | cmp eax,2 |
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392 | jnb adr_data_cluster |
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393 | |||
394 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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256 | diamond | 395 | cmp [fs_type],16 |
1 | ha | 396 | jne adr_data_cluster |
397 | mov eax,[ROOT_START] |
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398 | mov edx,[ROOT_SECTORS] |
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399 | mov [fat16_root],1 ; flag for fat16 rootdir |
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400 | jmp adr_new_sector |
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401 | |||
402 | adr_data_cluster: |
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403 | sub eax,2 |
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404 | mov edx,[SECTORS_PER_CLUSTER] |
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405 | imul eax,edx |
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406 | add eax,[DATA_START] |
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407 | |||
408 | adr_new_sector: |
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409 | mov ebx,buffer |
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410 | call hd_read |
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74 | mario79 | 411 | cmp [hd_error],0 |
412 | jne adr_not_found |
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413 | |||
1 | ha | 414 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
415 | |||
416 | adr_analyze: |
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417 | mov edi,[ebx+11] ; file attribute |
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418 | and edi,0xf |
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419 | cmp edi,0xf |
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420 | je adr_long_filename |
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421 | test edi,0x8 ; skip over volume label |
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422 | jne adr_long_filename ; Note: label can be same name as file/dir |
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423 | |||
424 | mov esi,[esp+0] ; filename need to be uppercase |
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425 | mov edi,ebx |
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426 | push ecx |
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427 | mov ecx,11 |
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428 | cld |
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429 | rep cmpsb ; compare 8+3 filename |
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430 | pop ecx |
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431 | je adr_found |
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432 | |||
433 | adr_long_filename: |
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434 | add ebx,32 ; position of next dir entry |
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435 | dec ecx |
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436 | jnz adr_analyze |
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437 | |||
438 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
||
439 | mov [longname_sec1],eax ; for delete long filename |
||
440 | mov [longname_sec2],ecx |
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441 | inc eax ; next sector |
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442 | dec edx |
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443 | jne adr_new_sector |
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444 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
445 | je adr_not_found |
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446 | |||
447 | adr_next_cluster: |
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448 | mov eax,[cluster_tmp] |
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449 | call get_FAT ; get next cluster |
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74 | mario79 | 450 | cmp [hd_error],0 |
451 | jne adr_not_found |
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452 | |||
1 | ha | 453 | cmp eax,2 ; incorrect fat chain? |
454 | jb adr_not_found ; yes |
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455 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
456 | jb adr_new_cluster ; no. analyse it |
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457 | |||
458 | adr_not_found: |
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459 | pop edi edi esi edx ecx ; first edi will remove ebx |
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460 | stc ; file not found |
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461 | ret |
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462 | |||
463 | adr_found: |
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464 | pop edi edi esi edx ecx ; first edi will remove ebx |
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465 | clc ; file found |
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466 | ret |
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467 | |||
468 | |||
469 | analyze_directory_to_write: |
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470 | ;----------------------------------------------------------- |
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471 | ; input : EAX = first cluster of the directory |
||
472 | ; output : IF CARRY=0 EAX = sector where the empty pos is found |
||
473 | ; EBX = pointer in buffer |
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474 | ; [buffer .. buffer+511] |
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475 | ; ECX,EDX,ESI,EDI not changed |
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476 | ; IF CARRY=1 disk full or fat corrupted |
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477 | ; Note : if cluster=0 it's changed to read rootdir |
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478 | ;----------------------------------------------------------- |
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479 | push ecx edx edi |
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480 | |||
481 | adw_new_cluster: |
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482 | mov [cluster_tmp],eax |
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483 | mov [fat16_root],0 |
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484 | cmp eax,[LAST_CLUSTER] |
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485 | ja adw_not_found ; too big cluster number, something is wrong |
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486 | cmp eax,2 |
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487 | jnb adw_data_cluster |
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488 | |||
489 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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256 | diamond | 490 | cmp [fs_type],16 |
1 | ha | 491 | jne adw_data_cluster |
492 | mov eax,[ROOT_START] |
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493 | mov edx,[ROOT_SECTORS] |
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494 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
495 | jmp adw_new_sector |
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496 | |||
497 | adw_data_cluster: |
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498 | sub eax,2 |
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499 | mov edx,[SECTORS_PER_CLUSTER] |
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500 | imul eax,edx |
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501 | add eax,[DATA_START] |
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502 | |||
503 | adw_new_sector: |
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504 | mov ebx,buffer |
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505 | call hd_read |
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74 | mario79 | 506 | cmp [hd_error],0 |
507 | jne adw_not_found |
||
508 | |||
1 | ha | 509 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
510 | |||
511 | adw_analyze: |
||
512 | cmp byte [ebx],0x00 ; is free entry? |
||
513 | je adw_found ; yes |
||
514 | cmp byte [ebx],0xe5 ; is deleted entry? |
||
515 | je adw_found ; yes |
||
516 | add ebx,32 ; position of next dir entry |
||
517 | dec ecx |
||
518 | jnz adw_analyze |
||
519 | |||
520 | inc eax ; next sector |
||
521 | dec edx |
||
522 | jne adw_new_sector |
||
523 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
524 | je adw_not_found |
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525 | |||
526 | mov eax,[cluster_tmp] |
||
527 | call get_FAT ; get next cluster |
||
74 | mario79 | 528 | cmp [hd_error],0 |
529 | jne adw_not_found |
||
530 | |||
1 | ha | 531 | cmp eax,2 ; incorrect fat chain? |
532 | jb adw_not_found ; yes |
||
533 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
534 | jb adw_new_cluster ; no. analyse it |
||
535 | |||
536 | mov eax,2 ; this block of code add a new cluster |
||
537 | call get_free_FAT ; for the directory because the directory |
||
538 | jc adw_not_found ; is full |
||
539 | |||
540 | mov edx,[fatEND] ; new end for directory |
||
541 | call set_FAT |
||
74 | mario79 | 542 | cmp [hd_error],0 |
543 | jne adw_not_found |
||
1 | ha | 544 | |
545 | push eax ; save new cluster |
||
546 | mov edx,eax |
||
547 | mov eax,[cluster_tmp] ; change last cluster to point new cluster |
||
548 | call set_FAT |
||
74 | mario79 | 549 | cmp [hd_error],0 |
550 | jne adw_not_found_1 |
||
551 | |||
1 | ha | 552 | mov ecx,-1 ; remove 1 cluster from free disk space |
553 | call add_disk_free_space |
||
74 | mario79 | 554 | cmp [hd_error],0 |
555 | jne adw_not_found_1 |
||
1 | ha | 556 | |
557 | mov ecx,512/4 |
||
558 | xor eax,eax |
||
559 | mov edi,buffer |
||
560 | cld |
||
561 | rep stosd ; clear new directory cluster |
||
562 | pop eax |
||
563 | |||
564 | sub eax,2 |
||
565 | mov ecx,[SECTORS_PER_CLUSTER] |
||
566 | imul eax,ecx |
||
567 | add eax,[DATA_START] |
||
568 | mov ebx,buffer |
||
569 | push eax ; save sector number |
||
570 | |||
571 | adw_set_empty_directory: |
||
572 | call hd_write |
||
74 | mario79 | 573 | cmp [hd_error],0 |
574 | jne adw_not_found_1 |
||
575 | |||
1 | ha | 576 | inc eax ; next sector |
577 | dec ecx |
||
578 | jnz adw_set_empty_directory |
||
579 | |||
580 | pop eax |
||
581 | |||
582 | adw_found: |
||
583 | pop edi edx ecx |
||
584 | clc ; free space found |
||
585 | ret |
||
74 | mario79 | 586 | adw_not_found_1: |
587 | add esp,4 |
||
1 | ha | 588 | adw_not_found: |
589 | pop edi edx ecx |
||
590 | stc ; free space not found |
||
591 | ret |
||
592 | |||
593 | |||
594 | get_data_cluster: |
||
595 | ;----------------------------------------------------------- |
||
596 | ; input : EAX = cluster |
||
597 | ; EBX = pointer to buffer |
||
598 | ; EDX = # blocks to read in buffer |
||
599 | ; ESI = # blocks to skip over |
||
600 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
601 | ; if CARRY=1 cluster out of range |
||
602 | ; Note : if cluster=0 it's changed to read rootdir |
||
603 | ;----------------------------------------------------------- |
||
604 | push eax ecx |
||
605 | |||
606 | mov [fat16_root],0 |
||
607 | cmp eax,[LAST_CLUSTER] |
||
608 | ja gdc_error ; too big cluster number, something is wrong |
||
609 | cmp eax,2 |
||
610 | jnb gdc_cluster |
||
611 | |||
612 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
256 | diamond | 613 | cmp [fs_type],16 |
1 | ha | 614 | jne gdc_cluster |
615 | mov eax,[ROOT_START] |
||
616 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
617 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
618 | jmp gdc_read |
||
619 | |||
620 | gdc_cluster: |
||
621 | sub eax,2 |
||
622 | mov ecx,[SECTORS_PER_CLUSTER] |
||
623 | imul eax,ecx |
||
624 | add eax,[DATA_START] |
||
625 | |||
626 | gdc_read: |
||
627 | test esi,esi ; first wanted block |
||
628 | je gdcl1 ; yes, skip count is 0 |
||
629 | dec esi |
||
630 | jmp gdcl2 |
||
631 | |||
632 | gdcl1: |
||
633 | call hd_read |
||
74 | mario79 | 634 | cmp [hd_error],0 |
379 | serge | 635 | jne gdc_error |
74 | mario79 | 636 | |
1 | ha | 637 | add ebx,512 ; update pointer |
638 | dec edx |
||
639 | |||
640 | gdcl2: |
||
641 | test edx,edx ; is all read? |
||
642 | je out_of_read |
||
643 | |||
644 | inc eax ; next sector |
||
645 | dec ecx |
||
646 | jnz gdc_read |
||
647 | |||
648 | out_of_read: |
||
649 | pop ecx eax |
||
650 | clc |
||
651 | ret |
||
652 | |||
653 | gdc_error: |
||
654 | pop ecx eax |
||
655 | stc |
||
656 | ret |
||
657 | |||
658 | |||
659 | set_data_cluster: |
||
660 | ;----------------------------------------------------------- |
||
661 | ; input : EAX = cluster |
||
662 | ; EBX = pointer to buffer |
||
663 | ; output : if CARRY=0 ok |
||
664 | ; if CARRY=1 cluster out of range |
||
665 | ;----------------------------------------------------------- |
||
666 | push eax ebx edx |
||
667 | |||
668 | cmp eax,[LAST_CLUSTER] |
||
669 | ja sdc_error ; too big cluster number, something is wrong |
||
670 | sub eax,2 |
||
671 | jb sdc_error ; don't allow rootdir write |
||
672 | |||
673 | mov edx,[SECTORS_PER_CLUSTER] |
||
674 | imul eax,edx |
||
675 | add eax,[DATA_START] |
||
676 | |||
677 | sdc_write: |
||
678 | call hd_write |
||
74 | mario79 | 679 | cmp [hd_error],0 |
680 | jne sdc_error |
||
681 | |||
1 | ha | 682 | add ebx,512 ; update pointer |
683 | inc eax |
||
684 | dec edx |
||
685 | jnz sdc_write |
||
686 | pop edx ebx eax |
||
687 | clc |
||
688 | ret |
||
689 | |||
690 | sdc_error: |
||
691 | pop edx ebx eax |
||
692 | stc |
||
693 | ret |
||
694 | |||
695 | |||
696 | get_cluster_of_a_path: |
||
697 | ;--------------------------------------------------------- |
||
698 | ; input : EBX = pointer to a path string |
||
699 | ; (example: the path "/files/data/document" become |
||
700 | ; "files......data.......document...0" |
||
701 | ; '.' = space char |
||
702 | ; '0' = char(0) (ASCII=0) !!! ) |
||
703 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
704 | ; if (CARRY=0) -> EAX=cluster |
||
705 | ;--------------------------------------------------------- |
||
706 | push ebx edx |
||
707 | |||
708 | mov eax,[ROOT_CLUSTER] |
||
709 | mov edx,ebx |
||
710 | |||
711 | search_end_of_path: |
||
712 | cmp byte [edx],0 |
||
713 | je found_end_of_path |
||
714 | |||
715 | inc edx ; '/' |
||
716 | mov ebx,edx |
||
717 | call analyze_directory |
||
718 | jc directory_not_found |
||
719 | |||
720 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
721 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
722 | and eax,[fatMASK] |
||
723 | add edx,11 ; 8+3 (name+extension) |
||
724 | jmp search_end_of_path |
||
725 | |||
726 | found_end_of_path: |
||
727 | pop edx ebx |
||
728 | clc ; no errors |
||
729 | ret |
||
730 | |||
731 | directory_not_found: |
||
732 | pop edx ebx |
||
733 | stc ; errors occour |
||
734 | ret |
||
735 | |||
736 | |||
737 | bcd2bin: |
||
738 | ;---------------------------------- |
||
739 | ; input : AL=BCD number (eg. 0x11) |
||
740 | ; output : AH=0 |
||
741 | ; AL=decimal number (eg. 11) |
||
742 | ;---------------------------------- |
||
743 | xor ah,ah |
||
744 | shl ax,4 |
||
745 | shr al,4 |
||
746 | aad |
||
747 | ret |
||
748 | |||
749 | |||
750 | get_date_for_file: |
||
751 | ;----------------------------------------------------- |
||
752 | ; Get date from CMOS and pack day,month,year in AX |
||
753 | ; DATE bits 0..4 : day of month 0..31 |
||
754 | ; 5..8 : month of year 1..12 |
||
755 | ; 9..15 : count of years from 1980 |
||
756 | ;----------------------------------------------------- |
||
757 | mov al,0x7 ;day |
||
758 | out 0x70,al |
||
759 | in al,0x71 |
||
760 | call bcd2bin |
||
761 | ror eax,5 |
||
762 | |||
763 | mov al,0x8 ;month |
||
764 | out 0x70,al |
||
765 | in al,0x71 |
||
766 | call bcd2bin |
||
767 | ror eax,4 |
||
768 | |||
769 | mov al,0x9 ;year |
||
770 | out 0x70,al |
||
771 | in al,0x71 |
||
772 | call bcd2bin |
||
773 | add ax,20 ;because CMOS return only the two last |
||
774 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
775 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
776 | ret |
||
777 | |||
778 | |||
779 | get_time_for_file: |
||
780 | ;----------------------------------------------------- |
||
781 | ; Get time from CMOS and pack hour,minute,second in AX |
||
782 | ; TIME bits 0..4 : second (the low bit is lost) |
||
783 | ; 5..10 : minute 0..59 |
||
784 | ; 11..15 : hour 0..23 |
||
785 | ;----------------------------------------------------- |
||
786 | mov al,0x0 ;second |
||
787 | out 0x70,al |
||
788 | in al,0x71 |
||
789 | call bcd2bin |
||
790 | ror eax,6 |
||
791 | |||
792 | mov al,0x2 ;minute |
||
793 | out 0x70,al |
||
794 | in al,0x71 |
||
795 | call bcd2bin |
||
796 | ror eax,6 |
||
797 | |||
798 | mov al,0x4 ;hour |
||
799 | out 0x70,al |
||
800 | in al,0x71 |
||
801 | call bcd2bin |
||
802 | rol eax,11 |
||
803 | ret |
||
804 | |||
805 | |||
806 | set_current_time_for_entry: |
||
807 | ;----------------------------------------------------- |
||
808 | ; Set current time/date for file entry |
||
809 | ; input : ebx = file entry pointer |
||
810 | ;----------------------------------------------------- |
||
811 | push eax |
||
812 | call get_time_for_file ; update files date/time |
||
813 | mov [ebx+22],ax |
||
814 | call get_date_for_file |
||
815 | mov [ebx+24],ax |
||
816 | pop eax |
||
817 | ret |
||
818 | |||
819 | |||
820 | |||
821 | add_disk_free_space: |
||
822 | ;----------------------------------------------------- |
||
823 | ; input : ecx = cluster count |
||
824 | ; Note : negative = remove clusters from free space |
||
825 | ; positive = add clusters to free space |
||
826 | ;----------------------------------------------------- |
||
827 | test ecx,ecx ; no change |
||
828 | je add_dfs_no |
||
256 | diamond | 829 | cmp [fs_type],32 ; free disk space only used by fat32 |
1 | ha | 830 | jne add_dfs_no |
831 | |||
832 | push eax ebx |
||
833 | mov eax,[ADR_FSINFO] |
||
133 | diamond | 834 | mov ebx,fsinfo_buffer |
1 | ha | 835 | call hd_read |
74 | mario79 | 836 | cmp [hd_error],0 |
837 | jne add_not_fs |
||
838 | |||
1 | ha | 839 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
840 | jne add_not_fs |
||
841 | |||
842 | add [ebx+0x1e8],ecx |
||
843 | call hd_write |
||
133 | diamond | 844 | ; cmp [hd_error],0 |
845 | ; jne add_not_fs |
||
1 | ha | 846 | |
847 | add_not_fs: |
||
848 | pop ebx eax |
||
849 | |||
850 | add_dfs_no: |
||
851 | ret |
||
852 | |||
853 | |||
854 | file_write: |
||
855 | ;-------------------------------------------------------------------------- |
||
856 | ; INPUT : user-reg register-in-this meaning symbol-in-this-routine |
||
857 | ; |
||
858 | ; EAX EDI system call to write / |
||
859 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
860 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
861 | ; ECX EBX (PAR2) file size PAR2 |
||
862 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
863 | ; |
||
864 | ; output : eax = 0 - ok |
||
865 | ; 3 - unknown FS |
||
866 | ; 5 - file not found |
||
867 | ; 8 - disk full |
||
868 | ; 10 - access denied |
||
869 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 870 | cmp [fs_type], 16 |
871 | jz fat_ok_for_writing |
||
872 | cmp [fs_type], 32 |
||
873 | jz fat_ok_for_writing |
||
874 | push ERROR_UNKNOWN_FS |
||
875 | pop eax |
||
876 | ret |
||
1 | ha | 877 | |
878 | fat_ok_for_writing: |
||
879 | ; call reserve_hd1 |
||
880 | |||
881 | pushad |
||
882 | |||
883 | xor edi,edi ; don't allow directory remove |
||
884 | call file_delete ; try to delete the file first |
||
74 | mario79 | 885 | cmp [hd_error],0 |
886 | jne exit_write_access_1 |
||
887 | |||
1 | ha | 888 | test eax,eax |
889 | jz old_deleted ; deleted ok |
||
890 | cmp eax,ERROR_FILE_NOT_FOUND |
||
891 | jnz exit_write_access ; it exist but can't delete |
||
892 | |||
893 | old_deleted: |
||
894 | mov ebx,PUSHAD_EDX |
||
895 | call get_cluster_of_a_path |
||
896 | jnc found_directory_for_writing |
||
74 | mario79 | 897 | cmp [hd_error],0 |
898 | jne exit_write_access |
||
1 | ha | 899 | |
900 | exit_writing_with_error: |
||
901 | popad |
||
902 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 903 | cmp [hd_error],0 |
904 | jne exit_write_access_2 |
||
905 | |||
1 | ha | 906 | mov [hd1_status],0 |
907 | mov eax,ERROR_FILE_NOT_FOUND |
||
908 | ret |
||
909 | |||
910 | exit_writing_disk_full_clear: |
||
74 | mario79 | 911 | cmp [hd_error],0 |
912 | jne exit_write_access_1 |
||
1 | ha | 913 | mov eax,[sector_tmp] |
914 | mov ebx,buffer |
||
915 | call hd_read ; read directory sector |
||
74 | mario79 | 916 | cmp [hd_error],0 |
917 | jne exit_write_access_1 |
||
918 | |||
1 | ha | 919 | mov edx,[entry_pos] |
920 | mov byte [edx],0xe5 ; mark as deleted |
||
921 | call hd_write |
||
74 | mario79 | 922 | cmp [hd_error],0 |
923 | jne exit_write_access_1 |
||
924 | |||
1 | ha | 925 | mov eax,[edx+20-2] ; FAT entry |
926 | mov ax,[edx+26] |
||
927 | and eax,[fatMASK] |
||
928 | call clear_cluster_chain |
||
929 | |||
930 | exit_writing_disk_full: |
||
74 | mario79 | 931 | cmp [hd_error],0 |
932 | jne exit_write_access_1 |
||
1 | ha | 933 | popad |
934 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 935 | cmp [hd_error],0 |
936 | jne exit_write_access_2 |
||
1 | ha | 937 | mov [hd1_status],0 |
938 | mov eax,ERROR_DISK_FULL |
||
939 | ret |
||
940 | |||
941 | exit_write_access: |
||
942 | popad |
||
943 | call update_disk ; write all of cache and fat to hd |
||
944 | mov [hd1_status],0 |
||
945 | mov eax,ERROR_ACCESS_DENIED |
||
946 | ret |
||
947 | |||
74 | mario79 | 948 | exit_write_access_1: |
949 | popad |
||
950 | exit_write_access_2: |
||
951 | mov [hd1_status],0 |
||
952 | mov eax,ERROR_ACCESS_DENIED |
||
953 | ret |
||
954 | |||
1 | ha | 955 | found_directory_for_writing: |
956 | call analyze_directory_to_write |
||
957 | jc exit_writing_disk_full |
||
958 | |||
959 | mov [sector_tmp],eax |
||
960 | mov [entry_pos],ebx |
||
961 | push eax ; save directory sector |
||
962 | mov eax,2 |
||
963 | call get_free_FAT |
||
964 | mov [cluster],eax ; first free cluster |
||
965 | pop eax |
||
966 | jc exit_writing_disk_full |
||
967 | |||
968 | mov esi,PUSHAD_EAX ; file name |
||
969 | mov edi,ebx ; pointer in buffer |
||
970 | mov ecx,11 |
||
971 | cld |
||
972 | rep movsb |
||
973 | |||
974 | mov esi,PUSHAD_EBX ; file size (bytes left) |
||
975 | mov [ebx+28],esi ; file size |
||
976 | mov ecx,[cluster] |
||
977 | mov [ebx+26],cx ; 16 bits low of cluster |
||
978 | shr ecx,16 |
||
979 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
980 | mov byte [ebx+11],0x20 ; attribute = archive |
||
981 | |||
982 | call set_current_time_for_entry |
||
983 | |||
984 | mov ebx,buffer ; save the directory name,length,cluster |
||
985 | call hd_write |
||
74 | mario79 | 986 | cmp [hd_error],0 |
987 | jne exit_write_access_1 |
||
1 | ha | 988 | |
989 | imul edi,[SECTORS_PER_CLUSTER],512 ; edi = cluster size in bytes |
||
990 | xor ecx,ecx ; cluster count |
||
991 | mov ebx,PUSHAD_ECX ; ebx = buffer |
||
992 | |||
993 | hd_new_block_write: |
||
994 | |||
995 | mov eax,[cluster] ; eax = block |
||
996 | call set_data_cluster |
||
74 | mario79 | 997 | cmp [hd_error],0 |
998 | jne exit_write_access_1 |
||
1 | ha | 999 | |
1000 | sub esi,edi ; sub wrote bytes |
||
1001 | jbe file_saved_OK ; end if all done |
||
1002 | add ebx,edi ; update buffer position |
||
1003 | |||
1004 | inc eax |
||
1005 | call get_free_FAT ; next free in FAT |
||
1006 | jc exit_writing_disk_full_clear |
||
1007 | |||
1008 | mov edx,eax |
||
1009 | xchg eax,[cluster] ; get old cluster and save new cluster |
||
1010 | call set_FAT ; add it in cluster chain |
||
74 | mario79 | 1011 | cmp [hd_error],0 |
1012 | jne exit_write_access_1 |
||
1013 | |||
1 | ha | 1014 | dec ecx ; update cluster count |
1015 | jmp hd_new_block_write |
||
1016 | |||
1017 | file_saved_OK: |
||
1018 | |||
1019 | mov edx,[fatEND] ; new end for cluster chain |
||
1020 | call set_FAT |
||
74 | mario79 | 1021 | cmp [hd_error],0 |
1022 | jne exit_write_access_1 |
||
1023 | |||
1 | ha | 1024 | dec ecx ; update cluster count |
1025 | |||
1026 | call add_disk_free_space ; remove clusters from free disk space |
||
74 | mario79 | 1027 | cmp [hd_error],0 |
1028 | jne exit_write_access_1 |
||
1 | ha | 1029 | |
1030 | popad |
||
1031 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1032 | cmp [hd_error],0 |
1033 | jne exit_write_access_2 |
||
1 | ha | 1034 | mov [hd1_status],0 |
1035 | xor eax,eax |
||
1036 | ret |
||
1037 | |||
1038 | |||
1039 | file_read: |
||
1040 | ;-------------------------------------------------------------------------- |
||
1041 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
1042 | ; |
||
1043 | ; EAX EDI system call to write / |
||
1044 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1045 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1046 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
1047 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1048 | ; EDI ESI vt first 512 block to read |
||
1049 | ; EDI if 0 - read root |
||
1050 | ; |
||
1051 | ; output : eax = 0 - ok |
||
1052 | ; 3 - unknown FS |
||
1053 | ; 5 - file not found |
||
1054 | ; 6 - end of file |
||
1055 | ; 9 - fat table corrupted |
||
74 | mario79 | 1056 | ; 10 - access denied |
1 | ha | 1057 | ; ebx = size of file/directory |
1058 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 1059 | cmp [fs_type], 16 |
1060 | jz fat_ok_for_reading |
||
1061 | cmp [fs_type], 32 |
||
1062 | jz fat_ok_for_reading |
||
1 | ha | 1063 | xor ebx,ebx |
1064 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 1065 | mov [hd1_status], ebx |
1 | ha | 1066 | ret |
1067 | |||
1068 | fat_ok_for_reading: |
||
1069 | ; call reserve_hd1 |
||
1070 | |||
1071 | pushad |
||
1072 | |||
1073 | mov ebx,edx |
||
1074 | call get_cluster_of_a_path |
||
1075 | jc file_to_read_not_found |
||
1076 | |||
1077 | test edi,edi ; read rootdir |
||
1078 | jne no_read_root |
||
1079 | |||
1080 | xor eax,eax |
||
1081 | call get_dir_size ; return rootdir size |
||
74 | mario79 | 1082 | cmp [hd_error],0 |
1083 | jne file_access_denied |
||
1084 | |||
1 | ha | 1085 | mov [file_size],eax |
1086 | mov eax,[ROOT_CLUSTER] |
||
1087 | jmp file_read_start |
||
1088 | |||
1089 | no_read_root: |
||
1090 | mov ebx,PUSHAD_EAX ; file name |
||
1091 | call analyze_directory |
||
1092 | jc file_to_read_not_found |
||
1093 | |||
1094 | mov eax,[ebx+28] ; file size |
||
1095 | test byte [ebx+11],0x10 ; is it directory? |
||
1096 | jz read_set_size ; no |
||
1097 | |||
1098 | mov eax,[ebx+20-2] ; FAT entry |
||
1099 | mov ax,[ebx+26] |
||
1100 | and eax,[fatMASK] |
||
1101 | call get_dir_size |
||
74 | mario79 | 1102 | cmp [hd_error],0 |
1103 | jne file_access_denied |
||
1 | ha | 1104 | |
1105 | read_set_size: |
||
1106 | mov [file_size],eax |
||
1107 | |||
1108 | mov eax,[ebx+20-2] ; FAT entry |
||
1109 | mov ax,[ebx+26] |
||
1110 | and eax,[fatMASK] |
||
1111 | |||
1112 | file_read_start: |
||
1113 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
1114 | mov edx,PUSHAD_EBX ; file blocks to read |
||
1115 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
1116 | |||
1117 | file_read_new_cluster: |
||
1118 | call get_data_cluster |
||
1119 | jc file_read_eof ; end of file or cluster out of range |
||
1120 | |||
1121 | test edx,edx ; is all read? |
||
1122 | je file_read_OK ; yes |
||
1123 | |||
1124 | call get_FAT ; get next cluster |
||
74 | mario79 | 1125 | cmp [hd_error],0 |
1126 | jne file_access_denied |
||
1127 | |||
1 | ha | 1128 | cmp eax,[fatRESERVED] ; end of file |
1129 | jnb file_read_eof |
||
1130 | cmp eax,2 ; incorrect fat chain |
||
1131 | jnb file_read_new_cluster |
||
1132 | |||
1133 | popad |
||
1134 | mov [hd1_status],0 |
||
1135 | mov ebx,[file_size] |
||
1136 | mov eax,ERROR_FAT_TABLE |
||
1137 | ret |
||
1138 | |||
1139 | file_read_eof: |
||
74 | mario79 | 1140 | cmp [hd_error],0 |
1141 | jne file_access_denied |
||
1 | ha | 1142 | popad |
1143 | mov [hd1_status],0 |
||
1144 | mov ebx,[file_size] |
||
1145 | mov eax,ERROR_END_OF_FILE |
||
1146 | ret |
||
1147 | |||
1148 | file_read_OK: |
||
1149 | popad |
||
1150 | mov [hd1_status],0 |
||
1151 | mov ebx,[file_size] |
||
1152 | xor eax,eax |
||
1153 | ret |
||
1154 | |||
1155 | file_to_read_not_found: |
||
74 | mario79 | 1156 | cmp [hd_error],0 |
1157 | jne file_access_denied |
||
1 | ha | 1158 | popad |
1159 | mov [hd1_status],0 |
||
1160 | xor ebx,ebx |
||
1161 | mov eax,ERROR_FILE_NOT_FOUND |
||
1162 | ret |
||
1163 | |||
74 | mario79 | 1164 | file_access_denied: |
1165 | popad |
||
1166 | mov [hd1_status],0 |
||
1167 | xor ebx,ebx |
||
1168 | mov eax,ERROR_ACCESS_DENIED |
||
1169 | ret |
||
1 | ha | 1170 | |
1171 | get_dir_size: |
||
1172 | ;----------------------------------------------------- |
||
1173 | ; input : eax = first cluster (0=rootdir) |
||
1174 | ; output : eax = directory size in bytes |
||
1175 | ;----------------------------------------------------- |
||
1176 | push edx |
||
1177 | xor edx,edx ; count of directory clusters |
||
1178 | test eax,eax |
||
1179 | jnz dir_size_next |
||
1180 | |||
1181 | mov eax,[ROOT_SECTORS] |
||
1182 | shl eax,9 ; fat16 rootdir size in bytes |
||
256 | diamond | 1183 | cmp [fs_type],16 |
1 | ha | 1184 | je dir_size_ret |
1185 | mov eax,[ROOT_CLUSTER] |
||
1186 | |||
1187 | dir_size_next: |
||
1188 | cmp eax,2 ; incorrect fat chain |
||
1189 | jb dir_size_end |
||
1190 | cmp eax,[fatRESERVED] ; end of directory |
||
1191 | ja dir_size_end |
||
1192 | call get_FAT ; get next cluster |
||
74 | mario79 | 1193 | cmp [hd_error],0 |
1194 | jne dir_size_ret |
||
1195 | |||
1 | ha | 1196 | inc edx |
1197 | jmp dir_size_next |
||
1198 | |||
1199 | dir_size_end: |
||
1200 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1201 | imul eax,edx |
||
1202 | |||
1203 | dir_size_ret: |
||
1204 | pop edx |
||
1205 | ret |
||
1206 | |||
1207 | |||
1208 | file_delete: |
||
1209 | ;----------------------------------------------------- |
||
1210 | ; input : eax = file/directory name |
||
1211 | ; edx = path |
||
1212 | ; edi = 1 - allow directory remove else don't remove directory |
||
1213 | ; output : eax = 0 - ok |
||
1214 | ; 3 - unknown FS |
||
1215 | ; 5 - file not found |
||
1216 | ; 10 - access denied |
||
1217 | ;----------------------------------------------------- |
||
256 | diamond | 1218 | cmp [fs_type], 16 |
1219 | jz file_del_fat_ok |
||
1220 | cmp [fs_type], 32 |
||
1221 | jz file_del_fat_ok |
||
1222 | push ERROR_UNKNOWN_FS |
||
1223 | pop eax |
||
1224 | ret |
||
1 | ha | 1225 | |
1226 | file_del_fat_ok: |
||
1227 | pushad |
||
1228 | |||
1229 | mov ebx,edx |
||
1230 | call get_cluster_of_a_path |
||
1231 | jc file_to_delete_not_found |
||
1232 | |||
1233 | mov ebx,PUSHAD_EAX ; file/directory name |
||
1234 | call analyze_directory |
||
1235 | jc file_to_delete_not_found |
||
1236 | |||
1237 | test byte [ebx+11],0x10 ; is it directory? |
||
335 | diamond | 1238 | jnz delete_no_access |
1 | ha | 1239 | |
1240 | delete_notdir: |
||
1241 | call delete_entry_name |
||
74 | mario79 | 1242 | cmp [hd_error],0 |
1243 | jne delete_no_access |
||
1244 | |||
1 | ha | 1245 | mov eax,ecx ; first cluster of file |
1246 | call clear_cluster_chain |
||
74 | mario79 | 1247 | cmp [hd_error],0 |
1248 | jne delete_no_access |
||
1249 | |||
1 | ha | 1250 | popad |
1251 | xor eax,eax |
||
1252 | ret |
||
1253 | |||
74 | mario79 | 1254 | delete_no_access_1: |
1255 | add esp,4 |
||
1 | ha | 1256 | delete_no_access: |
1257 | popad |
||
1258 | mov eax,ERROR_ACCESS_DENIED |
||
1259 | ret |
||
1260 | |||
1261 | file_to_delete_not_found: |
||
74 | mario79 | 1262 | cmp [hd_error],0 |
1263 | jne delete_no_access |
||
1 | ha | 1264 | popad |
1265 | mov eax,ERROR_FILE_NOT_FOUND |
||
1266 | ret |
||
1267 | |||
1268 | |||
1269 | clear_cluster_chain: |
||
1270 | ;----------------------------------------------------- |
||
1271 | ; input : eax = first cluster |
||
1272 | ;----------------------------------------------------- |
||
1273 | push eax ecx edx |
||
1274 | xor ecx,ecx ; cluster count |
||
1275 | |||
1276 | clean_new_chain: |
||
1277 | cmp eax,[LAST_CLUSTER] ; end of file |
||
1278 | ja delete_OK |
||
1279 | cmp eax,2 ; unfinished fat chain or zero length file |
||
1280 | jb delete_OK |
||
1281 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1282 | jz delete_OK |
||
1283 | |||
1284 | xor edx,edx |
||
1285 | call set_FAT ; clear fat entry |
||
74 | mario79 | 1286 | cmp [hd_error],0 |
1287 | jne access_denied_01 |
||
1288 | |||
1 | ha | 1289 | inc ecx ; update cluster count |
1290 | mov eax,edx ; old cluster |
||
1291 | jmp clean_new_chain |
||
1292 | |||
1293 | delete_OK: |
||
1294 | call add_disk_free_space ; add clusters to free disk space |
||
74 | mario79 | 1295 | access_denied_01: |
1 | ha | 1296 | pop edx ecx eax |
1297 | ret |
||
1298 | |||
1299 | |||
1300 | delete_entry_name: |
||
1301 | ;----------------------------------------------------- |
||
1302 | ; input : eax = directory sector |
||
1303 | ; ebx = directory pointer in buffer |
||
1304 | ; longname_sec = 2 previous directory sectors |
||
1305 | ; output : ecx = first cluster |
||
1306 | ; change : eax,ebx,edx |
||
1307 | ;----------------------------------------------------- |
||
1308 | mov byte [ebx],0xe5 |
||
1309 | mov ecx,[ebx+20-2] ; first cluster of file |
||
1310 | mov cx,[ebx+26] ; 0 length files start cluster = 0 |
||
1311 | and ecx,[fatMASK] |
||
1312 | |||
1313 | delete_empty: |
||
1314 | sub ebx,32 |
||
1315 | cmp ebx,buffer |
||
1316 | jnb delete_test_long |
||
1317 | |||
1318 | mov ebx,buffer |
||
1319 | call hd_write ; write directory sector back |
||
74 | mario79 | 1320 | cmp [hd_error],0 |
1321 | jne delete_name_end |
||
1322 | |||
1 | ha | 1323 | xor eax,eax |
1324 | xchg eax,[longname_sec2] |
||
1325 | xchg eax,[longname_sec1] |
||
1326 | test eax,eax ; is there previous directory sector? |
||
1327 | jz delete_name_end ; no |
||
1328 | |||
1329 | mov ebx,buffer |
||
1330 | call hd_read ; read previous sector |
||
74 | mario79 | 1331 | cmp [hd_error],0 |
379 | serge | 1332 | jne delete_name_end |
74 | mario79 | 1333 | |
1 | ha | 1334 | mov ebx,buffer+0x1e0 ; start from last entry |
1335 | |||
1336 | delete_test_long: |
||
1337 | mov dh,[ebx+11] ; file attribute |
||
1338 | and dh,0xf |
||
1339 | cmp dh,0xf |
||
1340 | jne delete_write_buffer |
||
1341 | |||
1342 | cmp byte [ebx],0x40 ; end of long dir entry? |
||
1343 | mov byte [ebx],0xe5 |
||
1344 | jb delete_empty |
||
1345 | |||
1346 | delete_write_buffer: |
||
1347 | mov ebx,buffer |
||
1348 | call hd_write ; write directory sector back |
||
1349 | |||
1350 | delete_name_end: |
||
1351 | ret |
||
1352 | |||
1353 | |||
1354 | get_hd_info: |
||
1355 | ;----------------------------------------------------------- |
||
1356 | ; output : eax = 0 - ok |
||
1357 | ; 3 - unknown FS |
||
74 | mario79 | 1358 | ; 10 - access denied |
1 | ha | 1359 | ; edx = cluster size in bytes |
1360 | ; ebx = total clusters on disk |
||
1361 | ; ecx = free clusters on disk |
||
1362 | ;----------------------------------------------------------- |
||
256 | diamond | 1363 | cmp [fs_type], 16 |
1364 | jz info_fat_ok |
||
1365 | cmp [fs_type], 32 |
||
1366 | jz info_fat_ok |
||
1 | ha | 1367 | xor edx,edx |
1368 | xor ebx,ebx |
||
1369 | xor ecx,ecx |
||
1370 | mov eax,ERROR_UNKNOWN_FS |
||
1371 | ret |
||
1372 | |||
1373 | info_fat_ok: |
||
1374 | ; call reserve_hd1 |
||
1375 | |||
1376 | xor ecx,ecx ; count of free clusters |
||
1377 | mov eax,2 |
||
1378 | mov ebx,[LAST_CLUSTER] |
||
1379 | |||
1380 | info_cluster: |
||
1381 | push eax |
||
1382 | call get_FAT ; get cluster info |
||
74 | mario79 | 1383 | cmp [hd_error],0 |
1384 | jne info_access_denied |
||
1385 | |||
1 | ha | 1386 | test eax,eax ; is it free? |
1387 | jnz info_used ; no |
||
1388 | inc ecx |
||
1389 | |||
1390 | info_used: |
||
1391 | pop eax |
||
1392 | inc eax |
||
1393 | cmp eax,ebx ; is above last cluster? |
||
1394 | jbe info_cluster ; no. test next cluster |
||
1395 | |||
1396 | dec ebx ; cluster count |
||
1397 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1398 | mov [hd1_status],0 |
||
1399 | xor eax,eax |
||
1400 | ret |
||
1401 | |||
74 | mario79 | 1402 | info_access_denied: |
379 | serge | 1403 | add esp,4 |
74 | mario79 | 1404 | xor edx,edx |
1405 | xor ebx,ebx |
||
1406 | xor ecx,ecx |
||
1407 | mov eax,ERROR_ACCESS_DENIED |
||
1408 | ret |
||
1 | ha | 1409 | |
1410 | update_disk: |
||
1411 | ;----------------------------------------------------------- |
||
1412 | ; write changed fat and cache to disk |
||
1413 | ;----------------------------------------------------------- |
||
1414 | cmp [fat_change],0 ; is fat changed? |
||
1415 | je upd_no_change |
||
1416 | |||
1417 | call write_fat_sector |
||
74 | mario79 | 1418 | cmp [hd_error],0 |
1419 | jne update_disk_acces_denied |
||
1 | ha | 1420 | |
1421 | upd_no_change: |
||
1422 | |||
1423 | call write_cache |
||
74 | mario79 | 1424 | update_disk_acces_denied: |
1 | ha | 1425 | ret |
1426 | |||
1427 | read_hd_file: |
||
1428 | ;----------------------------------------------------------------- |
||
1429 | ; |
||
1430 | ; Converting old reading function for hd-application start. |
||
1431 | ; |
||
1432 | ; IN: |
||
1433 | ; |
||
1434 | ; eax - pointer to file (0 = read only first sector of drive: eg 'label') |
||
1435 | ; ebx - file lenght |
||
1436 | ; ecx - start 512 byte block number |
||
1437 | ; edx - number of blocks to read |
||
1438 | ; esi - pointer to return/work area (atleast 20 000 bytes) |
||
1439 | ; |
||
1440 | ; For new read function |
||
1441 | ; |
||
1442 | ; EAX (PAR0) pointer to file-name |
||
1443 | ; ECX (PAR1) pointer to buffer |
||
1444 | ; EBX (PAR2) vt file blocks to read |
||
1445 | ; EDX (PAR3) pointer to path |
||
1446 | ; ESI vt first 512 block to read |
||
1447 | ; EDI if 0 - return root |
||
1448 | ;-------------------------------------------------------------------------- |
||
1449 | |||
1450 | push ecx esi edi |
||
1451 | mov esi,eax |
||
1452 | mov edi,startpath |
||
1453 | mov ecx,250 |
||
1454 | cld |
||
1455 | rep movsb |
||
1456 | pop edi esi ecx |
||
1457 | |||
1458 | mov eax,startpath |
||
1459 | mov [eax+ebx-12],byte 0 |
||
1460 | |||
1461 | push eax ebx ecx edx esi |
||
1462 | |||
1463 | pop ecx ; pointer to buffer |
||
1464 | add ecx,1024 |
||
1465 | pop ebx ; number of blocks to read |
||
1466 | pop esi ; first block to read |
||
1467 | dec esi |
||
1468 | pop eax ; file length |
||
1469 | pop edx ; pointer to path |
||
1470 | |||
1471 | mov edi,12 |
||
1472 | lea eax,[eax+edx-12+1] |
||
1473 | call file_read |
||
1474 | |||
1475 | ret |
||
1476 | |||
71 | diamond | 1477 | ; \begin{diamond} |
1478 | hd_find_lfn: |
||
1479 | ; in: esi->name |
||
1480 | ; out: CF=1 - file not found |
||
86 | diamond | 1481 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 1482 | ; destroys eax |
1483 | push esi edi |
||
1484 | push 0 |
||
1485 | push 0 |
||
1486 | push fat16_root_first |
||
1487 | push fat16_root_next |
||
1488 | mov eax, [ROOT_CLUSTER] |
||
256 | diamond | 1489 | cmp [fs_type], 32 |
83 | diamond | 1490 | jz .fat32 |
1491 | .loop: |
||
1492 | call fat_find_lfn |
||
1493 | jc .notfound |
||
1494 | cmp byte [esi], 0 |
||
1495 | jz .found |
||
1496 | test byte [edi+11], 10h |
||
1497 | jz .notfound |
||
1498 | and dword [esp+12], 0 |
||
88 | diamond | 1499 | mov eax, [edi+20-2] |
1500 | mov ax, [edi+26] ; cluster |
||
83 | diamond | 1501 | .fat32: |
1502 | mov [esp+8], eax |
||
1503 | mov dword [esp+4], fat_notroot_first |
||
1504 | mov dword [esp], fat_notroot_next |
||
1505 | jmp .loop |
||
71 | diamond | 1506 | .notfound: |
83 | diamond | 1507 | add esp, 16 |
1508 | pop edi esi |
||
1509 | stc |
||
1510 | ret |
||
71 | diamond | 1511 | .found: |
86 | diamond | 1512 | lea eax, [esp+8] |
1513 | cmp dword [eax], 0 |
||
1514 | jz .root |
||
1515 | call fat_get_sector |
||
1516 | jmp .cmn |
||
1517 | .root: |
||
1518 | mov eax, [eax+4] |
||
1519 | add eax, [ROOT_START] |
||
1520 | .cmn: |
||
83 | diamond | 1521 | add esp, 20 ; CF=0 |
1522 | pop esi |
||
1523 | ret |
||
74 | mario79 | 1524 | |
71 | diamond | 1525 | ;---------------------------------------------------------------- |
1526 | ; |
||
1527 | ; fs_HdRead - LFN variant for reading hard disk |
||
1528 | ; |
||
1529 | ; esi points to filename |
||
1530 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1531 | ; may be ebx=0 - start from first byte |
||
1532 | ; ecx number of bytes to read, 0+ |
||
1533 | ; edx mem location to return data |
||
1534 | ; |
||
77 | diamond | 1535 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 1536 | ; eax = 0 ok read or other = errormsg |
1537 | ; |
||
1538 | ;-------------------------------------------------------------- |
||
1539 | fs_HdRead: |
||
256 | diamond | 1540 | cmp [fs_type], 16 |
1541 | jz @f |
||
1542 | cmp [fs_type], 32 |
||
1543 | jz @f |
||
1544 | cmp [fs_type], 1 |
||
1545 | jz ntfs_HdRead |
||
1546 | or ebx, -1 |
||
1547 | mov eax, ERROR_UNKNOWN_FS |
||
1548 | ret |
||
71 | diamond | 1549 | @@: |
74 | mario79 | 1550 | push edi |
1551 | cmp byte [esi], 0 |
||
1552 | jnz @f |
||
71 | diamond | 1553 | .noaccess: |
74 | mario79 | 1554 | pop edi |
1555 | .noaccess_2: |
||
1556 | or ebx, -1 |
||
1557 | mov eax, ERROR_ACCESS_DENIED |
||
1558 | ret |
||
379 | serge | 1559 | |
74 | mario79 | 1560 | .noaccess_3: |
1561 | add esp,4 |
||
1562 | .noaccess_1: |
||
1563 | add esp,4 |
||
1564 | .noaccess_4: |
||
1565 | add esp,4*5 |
||
1566 | jmp .noaccess_2 |
||
1567 | |||
71 | diamond | 1568 | @@: |
74 | mario79 | 1569 | call hd_find_lfn |
1570 | jnc .found |
||
1571 | pop edi |
||
1572 | cmp [hd_error],0 |
||
1573 | jne .noaccess_2 |
||
1574 | or ebx, -1 |
||
1575 | mov eax, ERROR_FILE_NOT_FOUND |
||
1576 | ret |
||
1577 | |||
71 | diamond | 1578 | .found: |
74 | mario79 | 1579 | test byte [edi+11], 0x10 ; do not allow read directories |
1580 | jnz .noaccess |
||
1581 | test ebx, ebx |
||
1582 | jz .l1 |
||
1583 | cmp dword [ebx+4], 0 |
||
1584 | jz @f |
||
77 | diamond | 1585 | xor ebx, ebx |
71 | diamond | 1586 | .reteof: |
74 | mario79 | 1587 | mov eax, 6 |
1588 | pop edi |
||
1589 | ret |
||
71 | diamond | 1590 | @@: |
74 | mario79 | 1591 | mov ebx, [ebx] |
71 | diamond | 1592 | .l1: |
77 | diamond | 1593 | push ecx edx |
1594 | push 0 |
||
1595 | mov eax, [edi+28] |
||
1596 | sub eax, ebx |
||
1597 | jb .eof |
||
1598 | cmp eax, ecx |
||
1599 | jae @f |
||
1600 | mov ecx, eax |
||
1601 | mov byte [esp], 6 |
||
1602 | @@: |
||
74 | mario79 | 1603 | mov eax, [edi+20-2] |
1604 | mov ax, [edi+26] |
||
71 | diamond | 1605 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1606 | .new_cluster: |
||
74 | mario79 | 1607 | jecxz .new_sector |
1608 | test eax, eax |
||
1609 | jz .eof |
||
1610 | cmp eax, [fatRESERVED] |
||
1611 | jae .eof |
||
1612 | mov [cluster_tmp], eax |
||
1613 | dec eax |
||
1614 | dec eax |
||
1615 | mov edi, [SECTORS_PER_CLUSTER] |
||
1616 | imul eax, edi |
||
1617 | add eax, [DATA_START] |
||
71 | diamond | 1618 | .new_sector: |
74 | mario79 | 1619 | test ecx, ecx |
1620 | jz .done |
||
1621 | sub ebx, 512 |
||
1622 | jae .skip |
||
1623 | add ebx, 512 |
||
1624 | jnz .force_buf |
||
1625 | cmp ecx, 512 |
||
1626 | jb .force_buf |
||
71 | diamond | 1627 | ; we may read directly to given buffer |
74 | mario79 | 1628 | push ebx |
1629 | mov ebx, edx |
||
1630 | call hd_read |
||
1631 | cmp [hd_error],0 |
||
379 | serge | 1632 | jne .noaccess_1 |
74 | mario79 | 1633 | pop ebx |
1634 | add edx, 512 |
||
1635 | sub ecx, 512 |
||
1636 | jmp .skip |
||
71 | diamond | 1637 | .force_buf: |
1638 | ; we must read sector to temporary buffer and then copy it to destination |
||
74 | mario79 | 1639 | push eax ebx |
1640 | mov ebx, buffer |
||
1641 | call hd_read |
||
1642 | cmp [hd_error],0 |
||
1643 | jne .noaccess_3 |
||
1644 | |||
1645 | mov eax, ebx |
||
1646 | pop ebx |
||
1647 | add eax, ebx |
||
1648 | push ecx |
||
1649 | add ecx, ebx |
||
1650 | cmp ecx, 512 |
||
1651 | jbe @f |
||
1652 | mov ecx, 512 |
||
71 | diamond | 1653 | @@: |
74 | mario79 | 1654 | sub ecx, ebx |
1655 | mov ebx, edx |
||
1656 | call memmove |
||
1657 | add edx, ecx |
||
1658 | sub [esp], ecx |
||
1659 | pop ecx |
||
1660 | pop eax |
||
1661 | xor ebx, ebx |
||
71 | diamond | 1662 | .skip: |
74 | mario79 | 1663 | inc eax |
1664 | dec edi |
||
1665 | jnz .new_sector |
||
1666 | mov eax, [cluster_tmp] |
||
1667 | call get_FAT |
||
1668 | cmp [hd_error],0 |
||
1669 | jne .noaccess_4 |
||
1670 | |||
1671 | jmp .new_cluster |
||
71 | diamond | 1672 | .done: |
77 | diamond | 1673 | mov ebx, edx |
1674 | pop eax edx ecx edi |
||
1675 | sub ebx, edx |
||
1676 | ret |
||
71 | diamond | 1677 | .eof: |
77 | diamond | 1678 | mov ebx, edx |
1679 | pop eax edx ecx |
||
1680 | sub ebx, edx |
||
1681 | jmp .reteof |
||
75 | diamond | 1682 | |
1683 | ;---------------------------------------------------------------- |
||
1684 | ; |
||
1685 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
1686 | ; |
||
1687 | ; esi points to filename |
||
78 | diamond | 1688 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
1689 | ; & flags (bitfields) |
||
1690 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 1691 | ; ecx number of blocks to read, 0+ |
1692 | ; edx mem location to return data |
||
1693 | ; |
||
77 | diamond | 1694 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 1695 | ; eax = 0 ok read or other = errormsg |
1696 | ; |
||
1697 | ;-------------------------------------------------------------- |
||
1698 | fs_HdReadFolder: |
||
256 | diamond | 1699 | cmp [fs_type], 1 |
1700 | jz ntfs_HdReadFolder |
||
1701 | cmp [fs_type], 16 |
||
1702 | jz @f |
||
1703 | cmp [fs_type], 32 |
||
1704 | jz @f |
||
1705 | push ERROR_UNSUPPORTED_FS |
||
1706 | pop eax |
||
1707 | or ebx, -1 |
||
1708 | ret |
||
1709 | @@: |
||
75 | diamond | 1710 | mov eax, [ROOT_CLUSTER] |
1711 | push edi |
||
1712 | cmp byte [esi], 0 |
||
1713 | jz .doit |
||
1714 | call hd_find_lfn |
||
1715 | jnc .found |
||
1716 | pop edi |
||
1717 | or ebx, -1 |
||
1718 | mov eax, ERROR_FILE_NOT_FOUND |
||
1719 | ret |
||
1720 | .found: |
||
1721 | test byte [edi+11], 0x10 ; do not allow read files |
||
1722 | jnz .found_dir |
||
1723 | pop edi |
||
1724 | or ebx, -1 |
||
1725 | mov eax, ERROR_ACCESS_DENIED |
||
1726 | ret |
||
1727 | .found_dir: |
||
1728 | mov eax, [edi+20-2] |
||
1729 | mov ax, [edi+26] ; eax=cluster |
||
1730 | .doit: |
||
1731 | push esi ecx |
||
1732 | push ebp |
||
1733 | sub esp, 262*2 ; reserve space for LFN |
||
1734 | mov ebp, esp |
||
78 | diamond | 1735 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1736 | mov ebx, [ebx] |
||
75 | diamond | 1737 | ; init header |
1738 | push eax ecx |
||
1739 | mov edi, edx |
||
1740 | mov ecx, 32/4 |
||
1741 | xor eax, eax |
||
1742 | rep stosd |
||
1743 | pop ecx eax |
||
1744 | mov byte [edx], 1 ; version |
||
1745 | mov esi, edi ; esi points to BDFE |
||
1746 | .new_cluster: |
||
1747 | mov [cluster_tmp], eax |
||
1748 | test eax, eax |
||
1749 | jnz @f |
||
256 | diamond | 1750 | cmp [fs_type], 32 |
75 | diamond | 1751 | jz .notfound |
1752 | mov eax, [ROOT_START] |
||
1753 | push [ROOT_SECTORS] |
||
1754 | push ebx |
||
1755 | jmp .new_sector |
||
1756 | @@: |
||
1757 | dec eax |
||
1758 | dec eax |
||
1759 | imul eax, [SECTORS_PER_CLUSTER] |
||
1760 | push [SECTORS_PER_CLUSTER] |
||
1761 | add eax, [DATA_START] |
||
1762 | push ebx |
||
1763 | .new_sector: |
||
1764 | mov ebx, buffer |
||
1765 | mov edi, ebx |
||
1766 | call hd_read |
||
1767 | cmp [hd_error], 0 |
||
1768 | jnz .notfound2 |
||
1769 | add ebx, 512 |
||
1770 | push eax |
||
1771 | .l1: |
||
1772 | call fat_get_name |
||
1773 | jc .l2 |
||
1774 | cmp byte [edi+11], 0xF |
||
1775 | jnz .do_bdfe |
||
1776 | add edi, 0x20 |
||
1777 | cmp edi, ebx |
||
1778 | jb .do_bdfe |
||
1779 | pop eax |
||
1780 | inc eax |
||
1781 | dec dword [esp+4] |
||
1782 | jnz @f |
||
1783 | mov eax, [cluster_tmp] |
||
1784 | test eax, eax |
||
1785 | jz .done |
||
1786 | call get_FAT |
||
1787 | cmp [hd_error], 0 |
||
1788 | jnz .notfound2 |
||
1789 | cmp eax, 2 |
||
1790 | jb .done |
||
1791 | cmp eax, [fatRESERVED] |
||
1792 | jae .done |
||
1793 | push eax |
||
1794 | mov eax, [SECTORS_PER_CLUSTER] |
||
1795 | mov [esp+8], eax |
||
1796 | pop eax |
||
1797 | mov [cluster_tmp], eax |
||
1798 | dec eax |
||
1799 | dec eax |
||
1800 | imul eax, [SECTORS_PER_CLUSTER] |
||
1801 | add eax, [DATA_START] |
||
1802 | @@: |
||
1803 | mov ebx, buffer |
||
1804 | mov edi, ebx |
||
1805 | call hd_read |
||
1806 | cmp [hd_error], 0 |
||
1807 | jnz .notfound2 |
||
1808 | add ebx, 512 |
||
1809 | push eax |
||
1810 | .do_bdfe: |
||
1811 | inc dword [edx+8] ; new file found |
||
1812 | dec dword [esp+4] |
||
1813 | jns .l2 |
||
1814 | dec ecx |
||
1815 | js .l2 |
||
1816 | inc dword [edx+4] ; new file block copied |
||
1817 | call fat_entry_to_bdfe |
||
1818 | .l2: |
||
1819 | add edi, 0x20 |
||
1820 | cmp edi, ebx |
||
1821 | jb .l1 |
||
1822 | pop eax |
||
1823 | inc eax |
||
1824 | dec dword [esp+4] |
||
1825 | jnz .new_sector |
||
1826 | mov eax, [cluster_tmp] |
||
1827 | test eax, eax |
||
1828 | jz .done |
||
1829 | call get_FAT |
||
1830 | cmp [hd_error], 0 |
||
1831 | jnz .notfound2 |
||
1832 | cmp eax, 2 |
||
1833 | jb .done |
||
1834 | cmp eax, [fatRESERVED] |
||
1835 | jae .done |
||
1836 | push eax |
||
1837 | mov eax, [SECTORS_PER_CLUSTER] |
||
1838 | mov [esp+8], eax |
||
1839 | pop eax |
||
1840 | pop ebx |
||
1841 | add esp, 4 |
||
1842 | jmp .new_cluster |
||
1843 | .notfound2: |
||
1844 | add esp, 8 |
||
1845 | .notfound: |
||
1846 | add esp, 262*2+4 |
||
1847 | pop ebp ecx esi edi |
||
1848 | mov eax, ERROR_FILE_NOT_FOUND |
||
1849 | or ebx, -1 |
||
1850 | ret |
||
1851 | .done: |
||
1852 | add esp, 262*2+4+8 |
||
1853 | pop ebp |
||
77 | diamond | 1854 | mov ebx, [edx+4] |
75 | diamond | 1855 | xor eax, eax |
1856 | dec ecx |
||
1857 | js @f |
||
1858 | mov al, ERROR_END_OF_FILE |
||
1859 | @@: |
||
1860 | pop ecx esi edi |
||
1861 | ret |
||
1862 | |||
83 | diamond | 1863 | fat16_root_next: |
1864 | cmp edi, buffer+0x200-0x20 |
||
1865 | jae fat16_root_next_sector |
||
1866 | add edi, 0x20 |
||
1867 | ret ; CF=0 |
||
1868 | fat16_root_next_sector: |
||
1869 | ; read next sector |
||
171 | diamond | 1870 | push [longname_sec2] |
1871 | pop [longname_sec1] |
||
83 | diamond | 1872 | push ecx |
1873 | mov ecx, [eax+4] |
||
171 | diamond | 1874 | push ecx |
1875 | add ecx, [ROOT_START] |
||
1876 | mov [longname_sec2], ecx |
||
1877 | pop ecx |
||
83 | diamond | 1878 | inc ecx |
1879 | mov [eax+4], ecx |
||
1880 | cmp ecx, [ROOT_SECTORS] |
||
1881 | pop ecx |
||
1882 | jae fat16_root_first.readerr |
||
1883 | fat16_root_first: |
||
1884 | mov eax, [eax+4] |
||
1885 | add eax, [ROOT_START] |
||
1886 | push ebx |
||
1887 | mov edi, buffer |
||
1888 | mov ebx, edi |
||
1889 | call hd_read |
||
1890 | pop ebx |
||
1891 | cmp [hd_error], 0 |
||
1892 | jnz .readerr |
||
1893 | ret ; CF=0 |
||
1894 | .readerr: |
||
1895 | stc |
||
1896 | ret |
||
1897 | fat16_root_begin_write: |
||
1898 | push edi eax |
||
1899 | call fat16_root_first |
||
1900 | pop eax edi |
||
1901 | ret |
||
1902 | fat16_root_end_write: |
||
1903 | pusha |
||
1904 | mov eax, [eax+4] |
||
1905 | add eax, [ROOT_START] |
||
1906 | mov ebx, buffer |
||
1907 | call hd_write |
||
1908 | popa |
||
1909 | ret |
||
1910 | fat16_root_next_write: |
||
1911 | cmp edi, buffer+0x200 |
||
1912 | jae @f |
||
1913 | ret |
||
1914 | @@: |
||
1915 | call fat16_root_end_write |
||
1916 | jmp fat16_root_next_sector |
||
1917 | fat16_root_extend_dir: |
||
1918 | stc |
||
1919 | ret |
||
1920 | |||
1921 | fat_notroot_next: |
||
1922 | cmp edi, buffer+0x200-0x20 |
||
1923 | jae fat_notroot_next_sector |
||
1924 | add edi, 0x20 |
||
1925 | ret ; CF=0 |
||
1926 | fat_notroot_next_sector: |
||
171 | diamond | 1927 | push [longname_sec2] |
1928 | pop [longname_sec1] |
||
1929 | push eax |
||
1930 | call fat_get_sector |
||
1931 | mov [longname_sec2], eax |
||
1932 | pop eax |
||
83 | diamond | 1933 | push ecx |
1934 | mov ecx, [eax+4] |
||
1935 | inc ecx |
||
1936 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
1937 | jae fat_notroot_next_cluster |
||
1938 | mov [eax+4], ecx |
||
1939 | jmp @f |
||
1940 | fat_notroot_next_cluster: |
||
1941 | push eax |
||
1942 | mov eax, [eax] |
||
1943 | call get_FAT |
||
1944 | mov ecx, eax |
||
1945 | pop eax |
||
1946 | cmp [hd_error], 0 |
||
1947 | jnz fat_notroot_next_err |
||
1948 | cmp ecx, [fatRESERVED] |
||
1949 | jae fat_notroot_next_err |
||
1950 | mov [eax], ecx |
||
1951 | and dword [eax+4], 0 |
||
1952 | @@: |
||
1953 | pop ecx |
||
1954 | fat_notroot_first: |
||
1955 | call fat_get_sector |
||
1956 | push ebx |
||
1957 | mov edi, buffer |
||
1958 | mov ebx, edi |
||
1959 | call hd_read |
||
1960 | pop ebx |
||
1961 | cmp [hd_error], 0 |
||
1962 | jnz @f |
||
1963 | ret ; CF=0 |
||
1964 | fat_notroot_next_err: |
||
1965 | pop ecx |
||
1966 | @@: |
||
1967 | stc |
||
1968 | ret |
||
1969 | fat_notroot_begin_write: |
||
1970 | push eax edi |
||
1971 | call fat_notroot_first |
||
1972 | pop edi eax |
||
1973 | ret |
||
1974 | fat_notroot_end_write: |
||
1975 | call fat_get_sector |
||
1976 | push ebx |
||
1977 | mov ebx, buffer |
||
1978 | call hd_write |
||
1979 | pop ebx |
||
1980 | ret |
||
1981 | fat_notroot_next_write: |
||
1982 | cmp edi, buffer+0x200 |
||
1983 | jae @f |
||
1984 | ret |
||
1985 | @@: |
||
1986 | push eax |
||
1987 | call fat_notroot_end_write |
||
1988 | pop eax |
||
1989 | jmp fat_notroot_next_sector |
||
1990 | fat_notroot_extend_dir: |
||
1991 | push eax |
||
1992 | mov eax, [eax] |
||
1993 | call get_free_FAT |
||
1994 | jnc .found |
||
1995 | pop eax |
||
1996 | ret ; CF=1 |
||
1997 | .found: |
||
1998 | push edx |
||
1999 | mov edx, [fatEND] |
||
2000 | call set_FAT |
||
2001 | mov edx, eax |
||
2002 | mov eax, [esp+4] |
||
2003 | mov eax, [eax] |
||
2004 | push edx |
||
2005 | call set_FAT |
||
2006 | pop edx |
||
2007 | cmp [hd_error], 0 |
||
2008 | jz @f |
||
2009 | pop edx |
||
2010 | pop eax |
||
2011 | stc |
||
2012 | ret |
||
2013 | @@: |
||
2014 | push ecx |
||
2015 | or ecx, -1 |
||
2016 | call add_disk_free_space |
||
2017 | ; zero new cluster |
||
2018 | mov ecx, 512/4 |
||
2019 | mov edi, buffer |
||
2020 | push edi |
||
2021 | xor eax, eax |
||
2022 | rep stosd |
||
2023 | pop edi |
||
2024 | pop ecx |
||
2025 | mov eax, [esp+4] |
||
2026 | mov [eax], edx |
||
2027 | and dword [eax+4], 0 |
||
2028 | pop edx |
||
2029 | mov eax, [eax] |
||
2030 | dec eax |
||
2031 | dec eax |
||
2032 | push ebx ecx |
||
2033 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2034 | imul eax, ecx |
||
2035 | add eax, [DATA_START] |
||
2036 | mov ebx, edi |
||
2037 | @@: |
||
2038 | call hd_write |
||
2039 | inc eax |
||
2040 | loop @b |
||
2041 | pop ecx ebx eax |
||
2042 | clc |
||
2043 | ret |
||
2044 | |||
2045 | fat_get_sector: |
||
2046 | push ecx |
||
2047 | mov ecx, [eax] |
||
2048 | dec ecx |
||
2049 | dec ecx |
||
2050 | imul ecx, [SECTORS_PER_CLUSTER] |
||
2051 | add ecx, [DATA_START] |
||
2052 | add ecx, [eax+4] |
||
2053 | mov eax, ecx |
||
2054 | pop ecx |
||
2055 | ret |
||
2056 | |||
2057 | ;---------------------------------------------------------------- |
||
2058 | ; |
||
2059 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
2060 | ; |
||
2061 | ; esi points to filename |
||
2062 | ; ebx ignored (reserved) |
||
2063 | ; ecx number of bytes to write, 0+ |
||
2064 | ; edx mem location to data |
||
2065 | ; |
||
2066 | ; ret ebx = number of written bytes |
||
2067 | ; eax = 0 ok read or other = errormsg |
||
2068 | ; |
||
2069 | ;-------------------------------------------------------------- |
||
2070 | fshrad: |
||
2071 | mov eax, ERROR_ACCESS_DENIED |
||
2072 | xor ebx, ebx |
||
2073 | ret |
||
2074 | fshrfs: |
||
2075 | mov eax, ERROR_UNKNOWN_FS |
||
2076 | xor ebx, ebx |
||
2077 | ret |
||
2078 | |||
321 | diamond | 2079 | fs_HdCreateFolder: |
2080 | mov al, 1 |
||
2081 | jmp fs_HdRewrite.common |
||
2082 | |||
83 | diamond | 2083 | fs_HdRewrite: |
321 | diamond | 2084 | xor eax, eax |
2085 | .common: |
||
256 | diamond | 2086 | cmp [fs_type], 1 |
2087 | jz ntfs_HdRewrite |
||
2088 | cmp [fs_type], 16 |
||
2089 | jz @f |
||
2090 | cmp [fs_type], 32 |
||
2091 | jnz fshrfs |
||
2092 | @@: |
||
83 | diamond | 2093 | cmp byte [esi], 0 |
2094 | jz fshrad |
||
2095 | pushad |
||
2096 | xor ebp, ebp |
||
2097 | push esi |
||
2098 | @@: |
||
2099 | lodsb |
||
2100 | test al, al |
||
2101 | jz @f |
||
2102 | cmp al, '/' |
||
2103 | jnz @b |
||
2104 | lea ebp, [esi-1] |
||
2105 | jmp @b |
||
2106 | @@: |
||
2107 | pop esi |
||
2108 | test ebp, ebp |
||
2109 | jnz .noroot |
||
2110 | mov ebp, [ROOT_CLUSTER] |
||
256 | diamond | 2111 | cmp [fs_type], 32 |
83 | diamond | 2112 | jz .pushnotroot |
2113 | push fat16_root_extend_dir |
||
2114 | push fat16_root_end_write |
||
2115 | push fat16_root_next_write |
||
2116 | push fat16_root_begin_write |
||
2117 | xor ebp, ebp |
||
2118 | push ebp |
||
2119 | push ebp |
||
2120 | push fat16_root_first |
||
2121 | push fat16_root_next |
||
2122 | jmp .common1 |
||
2123 | .noroot: |
||
335 | diamond | 2124 | mov eax, ERROR_ACCESS_DENIED |
2125 | cmp byte [ebp+1], 0 |
||
2126 | jz .ret1 |
||
83 | diamond | 2127 | ; check existence |
2128 | mov byte [ebp], 0 |
||
2129 | call hd_find_lfn |
||
2130 | mov byte [ebp], '/' |
||
2131 | lea esi, [ebp+1] |
||
2132 | jnc @f |
||
2133 | mov eax, ERROR_FILE_NOT_FOUND |
||
2134 | .ret1: |
||
2135 | mov [esp+28], eax |
||
2136 | popad |
||
2137 | xor ebx, ebx |
||
2138 | ret |
||
2139 | @@: |
||
2140 | test byte [edi+11], 0x10 ; must be directory |
||
2141 | mov eax, ERROR_ACCESS_DENIED |
||
2142 | jz .ret1 |
||
2143 | mov ebp, [edi+20-2] |
||
2144 | mov bp, [edi+26] ; ebp=cluster |
||
2145 | mov eax, ERROR_FAT_TABLE |
||
2146 | cmp ebp, 2 |
||
2147 | jb .ret1 |
||
2148 | .pushnotroot: |
||
2149 | push fat_notroot_extend_dir |
||
2150 | push fat_notroot_end_write |
||
2151 | push fat_notroot_next_write |
||
2152 | push fat_notroot_begin_write |
||
2153 | push 0 |
||
2154 | push ebp |
||
2155 | push fat_notroot_first |
||
2156 | push fat_notroot_next |
||
2157 | .common1: |
||
2158 | call fat_find_lfn |
||
2159 | jc .notfound |
||
321 | diamond | 2160 | ; found |
91 | diamond | 2161 | test byte [edi+11], 10h |
321 | diamond | 2162 | jz .exists_file |
2163 | ; found directory; if we are creating directory, return OK, |
||
2164 | ; if we are creating file, say "access denied" |
||
2165 | add esp, 32 |
||
2166 | popad |
||
2167 | test al, al |
||
2168 | mov eax, ERROR_ACCESS_DENIED |
||
91 | diamond | 2169 | jz @f |
321 | diamond | 2170 | mov al, 0 |
2171 | @@: |
||
2172 | xor ebx, ebx |
||
2173 | ret |
||
2174 | .exists_file: |
||
2175 | ; found file; if we are creating directory, return "access denied", |
||
2176 | ; if we are creating file, delete existing file and continue |
||
2177 | cmp byte [esp+32+28], 0 |
||
2178 | jz @f |
||
91 | diamond | 2179 | add esp, 32 |
2180 | popad |
||
2181 | mov eax, ERROR_ACCESS_DENIED |
||
2182 | xor ebx, ebx |
||
2183 | ret |
||
2184 | @@: |
||
2185 | ; delete FAT chain |
||
83 | diamond | 2186 | push edi |
2187 | xor eax, eax |
||
2188 | mov dword [edi+28], eax ; zero size |
||
2189 | xor ecx, ecx |
||
2190 | mov eax, [edi+20-2] |
||
2191 | mov ax, [edi+26] |
||
2192 | mov word [edi+20], cx |
||
2193 | mov word [edi+26], cx |
||
2194 | test eax, eax |
||
2195 | jz .done1 |
||
2196 | @@: |
||
2197 | cmp eax, [fatRESERVED] |
||
2198 | jae .done1 |
||
2199 | push edx |
||
2200 | xor edx, edx |
||
2201 | call set_FAT |
||
2202 | mov eax, edx |
||
2203 | pop edx |
||
2204 | inc ecx |
||
2205 | jmp @b |
||
2206 | .done1: |
||
2207 | pop edi |
||
2208 | call get_time_for_file |
||
2209 | mov [edi+22], ax |
||
2210 | call get_date_for_file |
||
2211 | mov [edi+24], ax |
||
2212 | mov [edi+18], ax |
||
2213 | or byte [edi+11], 20h ; set 'archive' attribute |
||
2214 | jmp .doit |
||
2215 | .notfound: |
||
2216 | ; file is not found; generate short name |
||
2217 | call fat_name_is_legal |
||
2218 | jc @f |
||
2219 | add esp, 32 |
||
2220 | popad |
||
2221 | mov eax, ERROR_FILE_NOT_FOUND |
||
2222 | xor ebx, ebx |
||
2223 | ret |
||
2224 | @@: |
||
2225 | sub esp, 12 |
||
2226 | mov edi, esp |
||
2227 | call fat_gen_short_name |
||
2228 | .test_short_name_loop: |
||
2229 | push esi edi ecx |
||
2230 | mov esi, edi |
||
2231 | lea eax, [esp+12+12+8] |
||
2232 | mov [eax], ebp |
||
2233 | and dword [eax+4], 0 |
||
2234 | call dword [eax-4] |
||
2235 | jc .found |
||
2236 | .test_short_name_entry: |
||
2237 | cmp byte [edi+11], 0xF |
||
2238 | jz .test_short_name_cont |
||
2239 | mov ecx, 11 |
||
2240 | push esi edi |
||
2241 | repz cmpsb |
||
2242 | pop edi esi |
||
2243 | jz .short_name_found |
||
2244 | .test_short_name_cont: |
||
2245 | lea eax, [esp+12+12+8] |
||
2246 | call dword [eax-8] |
||
2247 | jnc .test_short_name_entry |
||
2248 | jmp .found |
||
2249 | .short_name_found: |
||
2250 | pop ecx edi esi |
||
2251 | call fat_next_short_name |
||
2252 | jnc .test_short_name_loop |
||
2253 | .disk_full: |
||
2254 | add esp, 12+32 |
||
2255 | popa |
||
2256 | mov eax, ERROR_DISK_FULL |
||
2257 | xor ebx, ebx |
||
2258 | ret |
||
2259 | .found: |
||
2260 | pop ecx edi esi |
||
2261 | ; now find space in directory |
||
2262 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
2263 | mov al, '~' |
||
2264 | push ecx edi |
||
2265 | mov ecx, 8 |
||
2266 | repnz scasb |
||
2267 | push 1 |
||
2268 | pop eax ; 1 entry |
||
2269 | jnz .notilde |
||
2270 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
2271 | xor eax, eax |
||
2272 | @@: |
||
2273 | cmp byte [esi], 0 |
||
2274 | jz @f |
||
2275 | inc esi |
||
2276 | inc eax |
||
2277 | jmp @b |
||
2278 | @@: |
||
2279 | sub esi, eax |
||
2280 | add eax, 12+13 |
||
2281 | mov ecx, 13 |
||
2282 | push edx |
||
2283 | cdq |
||
2284 | div ecx |
||
2285 | pop edx |
||
2286 | .notilde: |
||
2287 | push -1 |
||
2288 | push -1 |
||
2289 | push -1 |
||
2290 | ; find |
||
2291 | xor ecx, ecx |
||
2292 | push eax |
||
2293 | lea eax, [esp+16+8+12+8] |
||
2294 | mov [eax], ebp |
||
2295 | and dword [eax+4], 0 |
||
2296 | call dword [eax-4] |
||
2297 | pop eax |
||
2298 | jnc .scan_dir |
||
2299 | .fsfrfe3: |
||
2300 | add esp, 12+8+12+32 |
||
2301 | popad |
||
2302 | mov eax, 11 |
||
2303 | xor ebx, ebx |
||
2304 | ret |
||
2305 | .scan_dir: |
||
2306 | cmp byte [edi], 0 |
||
2307 | jz .free |
||
2308 | cmp byte [edi], 0xE5 |
||
2309 | jz .free |
||
2310 | xor ecx, ecx |
||
2311 | .scan_cont: |
||
2312 | push eax |
||
2313 | lea eax, [esp+16+8+12+8] |
||
2314 | call dword [eax-8] |
||
2315 | pop eax |
||
2316 | jnc .scan_dir |
||
2317 | cmp [hd_error], 0 |
||
2318 | jnz .fsfrfe3 |
||
2319 | push eax |
||
2320 | lea eax, [esp+16+8+12+8] |
||
2321 | call dword [eax+20] ; extend directory |
||
2322 | pop eax |
||
2323 | jnc .scan_dir |
||
2324 | add esp, 12+8+12+32 |
||
2325 | popad |
||
2326 | mov eax, ERROR_DISK_FULL |
||
2327 | xor ebx, ebx |
||
2328 | ret |
||
2329 | .free: |
||
2330 | test ecx, ecx |
||
2331 | jnz @f |
||
2332 | mov [esp], edi |
||
2333 | mov ecx, [esp+12+8+12+8] |
||
2334 | mov [esp+4], ecx |
||
2335 | mov ecx, [esp+12+8+12+12] |
||
2336 | mov [esp+8], ecx |
||
2337 | xor ecx, ecx |
||
2338 | @@: |
||
2339 | inc ecx |
||
2340 | cmp ecx, eax |
||
2341 | jb .scan_cont |
||
2342 | ; found! |
||
2343 | ; calculate name checksum |
||
2344 | push esi ecx |
||
2345 | mov esi, [esp+8+12] |
||
2346 | mov ecx, 11 |
||
2347 | xor eax, eax |
||
2348 | @@: |
||
2349 | ror al, 1 |
||
2350 | add al, [esi] |
||
2351 | inc esi |
||
2352 | loop @b |
||
2353 | pop ecx esi |
||
2354 | pop edi |
||
2355 | pop dword [esp+8+12+12] |
||
2356 | pop dword [esp+8+12+12] |
||
2357 | ; edi points to first entry in free chunk |
||
2358 | dec ecx |
||
2359 | jz .nolfn |
||
2360 | push esi |
||
2361 | push eax |
||
2362 | lea eax, [esp+8+8+12+8] |
||
2363 | call dword [eax+8] ; begin write |
||
2364 | mov al, 40h |
||
2365 | .writelfn: |
||
2366 | or al, cl |
||
2367 | mov esi, [esp+4] |
||
2368 | push ecx |
||
2369 | dec ecx |
||
2370 | imul ecx, 13 |
||
2371 | add esi, ecx |
||
2372 | stosb |
||
2373 | mov cl, 5 |
||
2374 | call fs_RamdiskRewrite.read_symbols |
||
2375 | mov ax, 0xF |
||
2376 | stosw |
||
2377 | mov al, [esp+4] |
||
2378 | stosb |
||
2379 | mov cl, 6 |
||
2380 | call fs_RamdiskRewrite.read_symbols |
||
2381 | xor eax, eax |
||
2382 | stosw |
||
2383 | mov cl, 2 |
||
2384 | call fs_RamdiskRewrite.read_symbols |
||
2385 | pop ecx |
||
2386 | lea eax, [esp+8+8+12+8] |
||
2387 | call dword [eax+12] ; next write |
||
2388 | xor eax, eax |
||
2389 | loop .writelfn |
||
2390 | pop eax |
||
2391 | pop esi |
||
2392 | ; lea eax, [esp+8+12+8] |
||
2393 | ; call dword [eax+16] ; end write |
||
2394 | .nolfn: |
||
2395 | xchg esi, [esp] |
||
2396 | mov ecx, 11 |
||
2397 | rep movsb |
||
2398 | mov word [edi], 20h ; attributes |
||
2399 | sub edi, 11 |
||
2400 | pop esi ecx |
||
2401 | add esp, 12 |
||
2402 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
2403 | call get_time_for_file |
||
2404 | mov [edi+14], ax ; creation time |
||
2405 | mov [edi+22], ax ; last write time |
||
2406 | call get_date_for_file |
||
2407 | mov [edi+16], ax ; creation date |
||
2408 | mov [edi+24], ax ; last write date |
||
2409 | mov [edi+18], ax ; last access date |
||
2410 | xor ecx, ecx |
||
2411 | mov word [edi+20], cx ; high word of cluster |
||
2412 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
2413 | mov dword [edi+28], ecx ; file size - to be filled |
||
321 | diamond | 2414 | cmp byte [esp+32+28], cl |
2415 | jz .doit |
||
2416 | ; create directory |
||
2417 | mov byte [edi+11], 10h ; attributes: folder |
||
2418 | mov edx, edi |
||
2419 | lea eax, [esp+8] |
||
2420 | call dword [eax+16] ; flush directory |
||
2421 | push ecx |
||
2422 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2423 | shl ecx, 9 |
||
2424 | jmp .doit2 |
||
83 | diamond | 2425 | .doit: |
2426 | lea eax, [esp+8] |
||
2427 | call dword [eax+16] ; flush directory |
||
2428 | push ecx |
||
2429 | mov ecx, [esp+4+32+24] |
||
321 | diamond | 2430 | .doit2: |
83 | diamond | 2431 | push ecx |
2432 | push edi |
||
2433 | mov esi, edx |
||
2434 | test ecx, ecx |
||
2435 | jz .done |
||
2436 | mov eax, 2 |
||
2437 | call get_free_FAT |
||
2438 | jc .diskfull |
||
2439 | push eax |
||
2440 | mov [edi+26], ax |
||
2441 | shr eax, 16 |
||
2442 | mov [edi+20], ax |
||
2443 | lea eax, [esp+16+8] |
||
2444 | call dword [eax+16] ; flush directory |
||
2445 | pop eax |
||
2446 | push edx |
||
2447 | mov edx, [fatEND] |
||
2448 | call set_FAT |
||
2449 | pop edx |
||
2450 | .write_cluster: |
||
2451 | push eax |
||
2452 | dec eax |
||
2453 | dec eax |
||
2454 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2455 | imul eax, ebp |
||
2456 | add eax, [DATA_START] |
||
2457 | ; write data |
||
2458 | .write_sector: |
||
321 | diamond | 2459 | cmp byte [esp+16+32+28], 0 |
2460 | jnz .writedir |
||
83 | diamond | 2461 | mov ecx, 512 |
2462 | cmp dword [esp+8], ecx |
||
2463 | jb .writeshort |
||
2464 | ; we can write directly from given buffer |
||
2465 | mov ebx, esi |
||
2466 | add esi, ecx |
||
2467 | jmp .writecommon |
||
2468 | .writeshort: |
||
2469 | mov ecx, [esp+8] |
||
2470 | push ecx |
||
2471 | mov edi, buffer |
||
2472 | mov ebx, edi |
||
2473 | rep movsb |
||
321 | diamond | 2474 | .writedircont: |
83 | diamond | 2475 | mov ecx, buffer+0x200 |
2476 | sub ecx, edi |
||
2477 | push eax |
||
2478 | xor eax, eax |
||
2479 | rep stosb |
||
2480 | pop eax |
||
2481 | pop ecx |
||
2482 | .writecommon: |
||
2483 | call hd_write |
||
2484 | cmp [hd_error], 0 |
||
2485 | jnz .writeerr |
||
2486 | inc eax |
||
2487 | sub dword [esp+8], ecx |
||
2488 | jz .writedone |
||
2489 | dec ebp |
||
2490 | jnz .write_sector |
||
2491 | ; allocate new cluster |
||
2492 | pop eax |
||
2493 | mov ecx, eax |
||
2494 | call get_free_FAT |
||
2495 | jc .diskfull |
||
2496 | push edx |
||
2497 | mov edx, [fatEND] |
||
2498 | call set_FAT |
||
2499 | xchg eax, ecx |
||
2500 | mov edx, ecx |
||
2501 | call set_FAT |
||
2502 | pop edx |
||
2503 | xchg eax, ecx |
||
2504 | jmp .write_cluster |
||
2505 | .diskfull: |
||
2506 | mov eax, ERROR_DISK_FULL |
||
2507 | jmp .ret |
||
2508 | .writeerr: |
||
2509 | pop eax |
||
2510 | sub esi, ecx |
||
2511 | mov eax, 11 |
||
2512 | jmp .ret |
||
2513 | .writedone: |
||
2514 | pop eax |
||
2515 | .done: |
||
2516 | xor eax, eax |
||
2517 | .ret: |
||
2518 | pop edi ecx |
||
2519 | mov ebx, esi |
||
2520 | sub ebx, edx |
||
2521 | pop ebp |
||
2522 | mov [esp+32+28], eax |
||
2523 | lea eax, [esp+8] |
||
2524 | call dword [eax+8] |
||
2525 | mov [edi+28], ebx |
||
2526 | call dword [eax+16] |
||
2527 | mov [esp+32+16], ebx |
||
2528 | lea eax, [ebx+511] |
||
2529 | shr eax, 9 |
||
2530 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2531 | lea eax, [eax+ecx-1] |
||
2532 | xor edx, edx |
||
2533 | div ecx |
||
2534 | mov ecx, ebp |
||
2535 | sub ecx, eax |
||
2536 | call add_disk_free_space |
||
2537 | add esp, 32 |
||
2538 | call update_disk |
||
2539 | popad |
||
2540 | ret |
||
321 | diamond | 2541 | .writedir: |
2542 | push 512 |
||
2543 | mov edi, buffer |
||
2544 | mov ebx, edi |
||
2545 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2546 | shl ecx, 9 |
||
2547 | cmp ecx, [esp+12] |
||
2548 | jnz .writedircont |
||
2549 | dec dword [esp+16] |
||
2550 | push esi |
||
2551 | mov ecx, 32/4 |
||
2552 | rep movsd |
||
2553 | pop esi |
||
2554 | mov dword [edi-32], '. ' |
||
2555 | mov dword [edi-32+4], ' ' |
||
2556 | mov dword [edi-32+8], ' ' |
||
2557 | mov byte [edi-32+11], 10h |
||
2558 | push esi |
||
2559 | mov ecx, 32/4 |
||
2560 | rep movsd |
||
2561 | pop esi |
||
2562 | mov dword [edi-32], '.. ' |
||
2563 | mov dword [edi-32+4], ' ' |
||
2564 | mov dword [edi-32+8], ' ' |
||
2565 | mov byte [edi-32+11], 10h |
||
2566 | mov ecx, [esp+20+8] |
||
2567 | cmp ecx, [ROOT_CLUSTER] |
||
2568 | jnz @f |
||
2569 | xor ecx, ecx |
||
2570 | @@: |
||
2571 | mov word [edi-32+26], cx |
||
2572 | shr ecx, 16 |
||
2573 | mov [edi-32+20], cx |
||
2574 | jmp .writedircont |
||
83 | diamond | 2575 | |
131 | diamond | 2576 | ;---------------------------------------------------------------- |
2577 | ; |
||
256 | diamond | 2578 | ; fs_HdWrite - LFN variant for writing to hard disk |
131 | diamond | 2579 | ; |
2580 | ; esi points to filename |
||
2581 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2582 | ; may be ebx=0 - start from first byte |
||
2583 | ; ecx number of bytes to write, 0+ |
||
2584 | ; edx mem location to data |
||
2585 | ; |
||
2586 | ; ret ebx = bytes written (maybe 0) |
||
2587 | ; eax = 0 ok write or other = errormsg |
||
2588 | ; |
||
2589 | ;-------------------------------------------------------------- |
||
2590 | fs_HdWrite.access_denied: |
||
2591 | push ERROR_ACCESS_DENIED |
||
2592 | fs_HdWrite.ret0: |
||
2593 | pop eax |
||
2594 | xor ebx, ebx |
||
2595 | ret |
||
2596 | |||
2597 | fs_HdWrite.ret11: |
||
2598 | push 11 |
||
2599 | jmp fs_HdWrite.ret0 |
||
2600 | |||
2601 | fs_HdWrite: |
||
256 | diamond | 2602 | cmp [fs_type], 1 |
2603 | jz ntfs_HdWrite |
||
2604 | cmp [fs_type], 16 |
||
2605 | jz @f |
||
2606 | cmp [fs_type], 32 |
||
2607 | jz @f |
||
131 | diamond | 2608 | push ERROR_UNKNOWN_FS |
2609 | jmp .ret0 |
||
2610 | @@: |
||
2611 | cmp byte [esi], 0 |
||
2612 | jz .access_denied |
||
2613 | pushad |
||
2614 | call hd_find_lfn |
||
2615 | pushfd |
||
2616 | cmp [hd_error], 0 |
||
2617 | jz @f |
||
2618 | popfd |
||
2619 | popad |
||
2620 | push 11 |
||
2621 | jmp .ret0 |
||
2622 | @@: |
||
2623 | popfd |
||
2624 | jnc .found |
||
2625 | popad |
||
2626 | push ERROR_FILE_NOT_FOUND |
||
2627 | jmp .ret0 |
||
2628 | .found: |
||
2629 | ; FAT does not support files larger than 4GB |
||
2630 | test ebx, ebx |
||
2631 | jz .l1 |
||
2632 | cmp dword [ebx+4], 0 |
||
2633 | jz @f |
||
2634 | .eof: |
||
2635 | popad |
||
2636 | push ERROR_END_OF_FILE |
||
2637 | jmp .ret0 |
||
2638 | @@: |
||
2639 | mov ebx, [ebx] |
||
2640 | .l1: |
||
2641 | ; now edi points to direntry, ebx=start byte to write, |
||
2642 | ; ecx=number of bytes to write, edx=data pointer |
||
2643 | |||
2644 | ; extend file if needed |
||
2645 | add ecx, ebx |
||
2646 | jc .eof ; FAT does not support files larger than 4GB |
||
2647 | push eax ; save directory sector |
||
2648 | push 0 ; return value=0 |
||
2649 | |||
2650 | call get_time_for_file |
||
2651 | mov [edi+22], ax ; last write time |
||
2652 | call get_date_for_file |
||
2653 | mov [edi+24], ax ; last write date |
||
2654 | mov [edi+18], ax ; last access date |
||
2655 | |||
2656 | push dword [edi+28] ; save current file size |
||
2657 | cmp ecx, [edi+28] |
||
2658 | jbe .length_ok |
||
2659 | cmp ecx, ebx |
||
2660 | jz .length_ok |
||
2661 | call hd_extend_file |
||
2662 | jnc .length_ok |
||
2663 | mov [esp+4], eax |
||
2664 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2665 | ; First two cases are fatal errors, in third case we may write some data |
||
2666 | cmp al, ERROR_DISK_FULL |
||
2667 | jz .disk_full |
||
2668 | pop eax |
||
2669 | pop eax |
||
2670 | mov [esp+4+28], eax |
||
2671 | pop eax |
||
2672 | popad |
||
2673 | xor ebx, ebx |
||
2674 | ret |
||
2675 | .disk_full: |
||
2676 | ; correct number of bytes to write |
||
2677 | mov ecx, [edi+28] |
||
2678 | cmp ecx, ebx |
||
2679 | ja .length_ok |
||
2680 | .ret: |
||
2681 | call update_disk |
||
2682 | cmp [hd_error], 0 |
||
2683 | jz @f |
||
2684 | mov byte [esp+4], 11 |
||
2685 | @@: |
||
2686 | pop eax |
||
2687 | pop eax |
||
2688 | mov [esp+4+28], eax ; eax=return value |
||
2689 | pop eax |
||
2690 | sub edx, [esp+20] |
||
2691 | mov [esp+16], edx ; ebx=number of written bytes |
||
2692 | popad |
||
2693 | ret |
||
2694 | .length_ok: |
||
2695 | mov esi, [edi+28] |
||
2696 | mov eax, [edi+20-2] |
||
2697 | mov ax, [edi+26] |
||
2698 | mov edi, eax ; edi=current cluster |
||
2699 | xor ebp, ebp ; ebp=current sector in cluster |
||
2700 | ; save directory |
||
2701 | mov eax, [esp+8] |
||
2702 | push ebx |
||
2703 | mov ebx, buffer |
||
2704 | call hd_write |
||
2705 | pop ebx |
||
2706 | cmp [hd_error], 0 |
||
2707 | jz @f |
||
2708 | .device_err: |
||
2709 | mov byte [esp+4], 11 |
||
2710 | jmp .ret |
||
2711 | @@: |
||
2712 | |||
2713 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
2714 | sub ecx, ebx |
||
2715 | jz .ret |
||
2716 | .write_loop: |
||
321 | diamond | 2717 | ; skip unmodified sectors |
2718 | cmp dword [esp], 0x200 |
||
2719 | jb .modify |
||
2720 | sub ebx, 0x200 |
||
2721 | jae .skip |
||
2722 | add ebx, 0x200 |
||
2723 | .modify: |
||
131 | diamond | 2724 | ; get length of data in current sector |
2725 | push ecx |
||
2726 | sub ebx, 0x200 |
||
2727 | jb .hasdata |
||
2728 | neg ebx |
||
2729 | xor ecx, ecx |
||
2730 | jmp @f |
||
2731 | .hasdata: |
||
2732 | neg ebx |
||
2733 | cmp ecx, ebx |
||
2734 | jbe @f |
||
2735 | mov ecx, ebx |
||
2736 | @@: |
||
2737 | ; get current sector number |
||
2738 | mov eax, edi |
||
2739 | dec eax |
||
2740 | dec eax |
||
2741 | imul eax, [SECTORS_PER_CLUSTER] |
||
2742 | add eax, [DATA_START] |
||
2743 | add eax, ebp |
||
2744 | ; load sector if needed |
||
2745 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
2746 | jz .noread |
||
2747 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2748 | jz .noread |
||
2749 | cmp ecx, esi ; (same for the last sector) |
||
2750 | jz .noread |
||
2751 | push ebx |
||
2752 | mov ebx, buffer |
||
2753 | call hd_read |
||
2754 | pop ebx |
||
2755 | cmp [hd_error], 0 |
||
2756 | jz @f |
||
2757 | .device_err2: |
||
2758 | pop ecx |
||
2759 | jmp .device_err |
||
2760 | @@: |
||
2761 | .noread: |
||
2762 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2763 | push eax ecx edi |
||
2764 | xor eax, eax |
||
2765 | mov ecx, 0x200 |
||
2766 | sub ecx, [esp+4+12] |
||
2767 | jbe @f |
||
2768 | mov edi, buffer |
||
2769 | add edi, [esp+4+12] |
||
2770 | rep stosb |
||
2771 | @@: |
||
2772 | ; zero uninitialized data in the last sector |
||
2773 | mov ecx, 0x200 |
||
2774 | sub ecx, esi |
||
2775 | jbe @f |
||
2776 | mov edi, buffer |
||
2777 | add edi, esi |
||
2778 | rep stosb |
||
2779 | @@: |
||
321 | diamond | 2780 | pop edi ecx |
131 | diamond | 2781 | ; copy new data |
2782 | mov eax, edx |
||
2783 | neg ebx |
||
2784 | jecxz @f |
||
2785 | add ebx, buffer+0x200 |
||
2786 | call memmove |
||
2787 | xor ebx, ebx |
||
2788 | @@: |
||
2789 | pop eax |
||
2790 | ; save sector |
||
2791 | push ebx |
||
2792 | mov ebx, buffer |
||
2793 | call hd_write |
||
2794 | pop ebx |
||
2795 | cmp [hd_error], 0 |
||
2796 | jnz .device_err2 |
||
2797 | add edx, ecx |
||
2798 | sub [esp], ecx |
||
2799 | pop ecx |
||
2800 | jz .ret |
||
321 | diamond | 2801 | .skip: |
131 | diamond | 2802 | ; next sector |
2803 | inc ebp |
||
2804 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2805 | jb @f |
||
2806 | xor ebp, ebp |
||
2807 | mov eax, edi |
||
2808 | call get_FAT |
||
2809 | mov edi, eax |
||
2810 | cmp [hd_error], 0 |
||
2811 | jnz .device_err |
||
2812 | @@: |
||
2813 | sub esi, 0x200 |
||
2814 | jae @f |
||
2815 | xor esi, esi |
||
2816 | @@: |
||
2817 | sub dword [esp], 0x200 |
||
2818 | jae @f |
||
2819 | and dword [esp], 0 |
||
2820 | @@: jmp .write_loop |
||
2821 | |||
2822 | hd_extend_file.zero_size: |
||
2823 | xor eax, eax |
||
2824 | jmp hd_extend_file.start_extend |
||
2825 | |||
2826 | ; extends file on hd to given size (new data area is undefined) |
||
2827 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 2828 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 2829 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
2830 | hd_extend_file: |
||
2831 | push ebp |
||
2832 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2833 | imul ebp, [BYTES_PER_SECTOR] |
||
2834 | push ecx |
||
2835 | ; find the last cluster of file |
||
2836 | mov eax, [edi+20-2] |
||
2837 | mov ax, [edi+26] |
||
2838 | mov ecx, [edi+28] |
||
2839 | jecxz .zero_size |
||
2840 | .last_loop: |
||
2841 | sub ecx, ebp |
||
2842 | jbe .last_found |
||
2843 | call get_FAT |
||
2844 | cmp [hd_error], 0 |
||
2845 | jz @f |
||
2846 | .device_err: |
||
2847 | pop ecx |
||
2848 | .device_err2: |
||
2849 | pop ebp |
||
2850 | push 11 |
||
2851 | .ret_err: |
||
2852 | pop eax |
||
2853 | stc |
||
2854 | ret |
||
2855 | @@: |
||
2856 | cmp eax, 2 |
||
2857 | jb .fat_err |
||
2858 | cmp eax, [fatRESERVED] |
||
2859 | jb .last_loop |
||
2860 | .fat_err: |
||
2861 | pop ecx ebp |
||
2862 | push ERROR_FAT_TABLE |
||
2863 | jmp .ret_err |
||
2864 | .last_found: |
||
2865 | push eax |
||
2866 | call get_FAT |
||
2867 | cmp [hd_error], 0 |
||
2868 | jz @f |
||
2869 | pop eax |
||
2870 | jmp .device_err |
||
2871 | @@: |
||
2872 | cmp eax, [fatRESERVED] |
||
2873 | pop eax |
||
2874 | jb .fat_err |
||
2875 | ; set length to full number of clusters |
||
2876 | sub [edi+28], ecx |
||
2877 | .start_extend: |
||
2878 | pop ecx |
||
2879 | ; now do extend |
||
2880 | push edx |
||
2881 | mov edx, 2 ; start scan from cluster 2 |
||
2882 | .extend_loop: |
||
2883 | cmp [edi+28], ecx |
||
2884 | jae .extend_done |
||
2885 | ; add new cluster |
||
2886 | push eax |
||
2887 | mov eax, edx |
||
2888 | call get_free_FAT |
||
2889 | jc .disk_full |
||
2890 | mov edx, [fatEND] |
||
2891 | call set_FAT |
||
2892 | mov edx, eax |
||
2893 | pop eax |
||
2894 | test eax, eax |
||
2895 | jz .first_cluster |
||
2896 | push edx |
||
2897 | call set_FAT |
||
2898 | pop edx |
||
2899 | jmp @f |
||
2900 | .first_cluster: |
||
2901 | ror edx, 16 |
||
2902 | mov [edi+20], dx |
||
2903 | ror edx, 16 |
||
2904 | mov [edi+26], dx |
||
2905 | @@: |
||
133 | diamond | 2906 | push ecx |
2907 | mov ecx, -1 |
||
2908 | call add_disk_free_space |
||
2909 | pop ecx |
||
131 | diamond | 2910 | mov eax, edx |
2911 | cmp [hd_error], 0 |
||
2912 | jnz .device_err3 |
||
2913 | add [edi+28], ebp |
||
2914 | jmp .extend_loop |
||
2915 | .extend_done: |
||
2916 | mov [edi+28], ecx |
||
2917 | pop edx ebp |
||
133 | diamond | 2918 | xor eax, eax ; CF=0 |
131 | diamond | 2919 | ret |
2920 | .device_err3: |
||
2921 | pop edx |
||
2922 | jmp .device_err2 |
||
2923 | .disk_full: |
||
2924 | pop eax edx ebp |
||
2925 | push ERROR_DISK_FULL |
||
2926 | pop eax |
||
2927 | cmp [hd_error], 0 |
||
2928 | jz @f |
||
2929 | mov al, 11 |
||
2930 | @@: stc |
||
2931 | ret |
||
2932 | |||
133 | diamond | 2933 | ;---------------------------------------------------------------- |
2934 | ; |
||
2935 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
2936 | ; |
||
2937 | ; esi points to filename |
||
2938 | ; ebx points to 64-bit number = new file size |
||
2939 | ; ecx ignored (reserved) |
||
2940 | ; edx ignored (reserved) |
||
2941 | ; |
||
2942 | ; ret eax = 0 ok or other = errormsg |
||
2943 | ; |
||
2944 | ;-------------------------------------------------------------- |
||
2945 | fs_HdSetFileEnd: |
||
256 | diamond | 2946 | cmp [fs_type], 1 |
2947 | jz ntfs_HdSetFileEnd |
||
2948 | cmp [fs_type], 16 |
||
2949 | jz @f |
||
2950 | cmp [fs_type], 32 |
||
2951 | jz @f |
||
133 | diamond | 2952 | push ERROR_UNKNOWN_FS |
2953 | .ret: |
||
2954 | pop eax |
||
2955 | ret |
||
2956 | @@: |
||
2957 | cmp byte [esi], 0 |
||
2958 | jnz @f |
||
2959 | .access_denied: |
||
2960 | push ERROR_ACCESS_DENIED |
||
2961 | jmp .ret |
||
2962 | @@: |
||
2963 | push edi |
||
2964 | call hd_find_lfn |
||
2965 | pushfd |
||
2966 | cmp [hd_error], 0 |
||
2967 | jz @f |
||
2968 | popfd |
||
2969 | push 11 |
||
2970 | jmp .ret |
||
2971 | @@: |
||
2972 | popfd |
||
2973 | jnc @f |
||
2974 | pop edi |
||
2975 | push ERROR_FILE_NOT_FOUND |
||
2976 | jmp .ret |
||
2977 | @@: |
||
2978 | ; must not be directory |
||
2979 | test byte [edi+11], 10h |
||
2980 | jz @f |
||
2981 | pop edi |
||
2982 | jmp .access_denied |
||
2983 | @@: |
||
2984 | ; file size must not exceed 4 Gb |
||
2985 | cmp dword [ebx+4], 0 |
||
2986 | jz @f |
||
2987 | pop edi |
||
2988 | push ERROR_END_OF_FILE |
||
2989 | jmp .ret |
||
2990 | @@: |
||
2991 | push eax ; save directory sector |
||
2992 | ; set file modification date/time to current |
||
2993 | call fat_update_datetime |
||
2994 | mov eax, [ebx] |
||
2995 | cmp eax, [edi+28] |
||
2996 | jb .truncate |
||
2997 | ja .expand |
||
2998 | pop eax |
||
2999 | mov ebx, buffer |
||
3000 | call hd_write |
||
3001 | pop edi |
||
3002 | xor eax, eax |
||
3003 | cmp [hd_error], 0 |
||
3004 | jz @f |
||
3005 | mov al, 11 |
||
3006 | @@: |
||
3007 | ret |
||
3008 | .expand: |
||
3009 | push ebx ebp ecx |
||
3010 | push dword [edi+28] ; save old size |
||
3011 | mov ecx, eax |
||
3012 | call hd_extend_file |
||
3013 | push eax ; return code |
||
3014 | jnc .expand_ok |
||
3015 | cmp al, ERROR_DISK_FULL |
||
3016 | jz .disk_full |
||
3017 | .pop_ret: |
||
3018 | call update_disk |
||
3019 | pop eax ecx ebp ebx ecx edi edi |
||
3020 | ret |
||
3021 | .expand_ok: |
||
3022 | .disk_full: |
||
3023 | ; save directory |
||
3024 | mov eax, [edi+28] |
||
3025 | xchg eax, [esp+20] |
||
3026 | mov ebx, buffer |
||
3027 | call hd_write |
||
3028 | mov eax, [edi+20-2] |
||
3029 | mov ax, [edi+26] |
||
3030 | mov edi, eax |
||
3031 | cmp [hd_error], 0 |
||
3032 | jz @f |
||
3033 | .pop_ret11: |
||
3034 | mov byte [esp], 11 |
||
3035 | jmp .pop_ret |
||
3036 | @@: |
||
3037 | ; now zero new data |
||
3038 | xor ebp, ebp |
||
3039 | ; edi=current cluster, ebp=sector in cluster |
||
3040 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
||
3041 | .zero_loop: |
||
3042 | sub dword [esp+4], 0x200 |
||
3043 | jae .next_cluster |
||
3044 | lea eax, [edi-2] |
||
3045 | imul eax, [SECTORS_PER_CLUSTER] |
||
3046 | add eax, [DATA_START] |
||
3047 | add eax, ebp |
||
3048 | cmp dword [esp+4], -0x200 |
||
3049 | jz .noread |
||
3050 | mov ebx, buffer |
||
3051 | call hd_read |
||
3052 | cmp [hd_error], 0 |
||
3053 | jnz .err_next |
||
3054 | .noread: |
||
3055 | mov ecx, [esp+4] |
||
3056 | neg ecx |
||
3057 | push edi |
||
3058 | mov edi, buffer+0x200 |
||
3059 | add edi, [esp+8] |
||
3060 | push eax |
||
3061 | xor eax, eax |
||
3062 | mov [esp+12], eax |
||
3063 | rep stosb |
||
3064 | pop eax |
||
3065 | pop edi |
||
3066 | call hd_write |
||
3067 | cmp [hd_error], 0 |
||
3068 | jz .next_cluster |
||
3069 | .err_next: |
||
3070 | mov byte [esp], 11 |
||
3071 | .next_cluster: |
||
3072 | sub dword [esp+20], 0x200 |
||
3073 | jbe .pop_ret |
||
3074 | inc ebp |
||
3075 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
3076 | jb .zero_loop |
||
3077 | xor ebp, ebp |
||
3078 | mov eax, edi |
||
3079 | call get_FAT |
||
3080 | mov edi, eax |
||
3081 | cmp [hd_error], 0 |
||
3082 | jnz .pop_ret11 |
||
3083 | jmp .zero_loop |
||
3084 | .truncate: |
||
3085 | mov [edi+28], eax |
||
3086 | push ecx |
||
3087 | mov ecx, [edi+20-2] |
||
3088 | mov cx, [edi+26] |
||
3089 | push eax |
||
3090 | test eax, eax |
||
3091 | jz .zero_size |
||
3092 | ; find new last cluster |
||
3093 | @@: |
||
3094 | mov eax, [SECTORS_PER_CLUSTER] |
||
3095 | shl eax, 9 |
||
3096 | sub [esp], eax |
||
3097 | jbe @f |
||
3098 | mov eax, ecx |
||
3099 | call get_FAT |
||
3100 | mov ecx, eax |
||
3101 | cmp [hd_error], 0 |
||
3102 | jz @b |
||
3103 | .device_err3: |
||
3104 | pop eax ecx eax edi |
||
3105 | push 11 |
||
3106 | pop eax |
||
3107 | ret |
||
3108 | @@: |
||
3109 | ; we will zero data at the end of last sector - remember it |
||
3110 | push ecx |
||
3111 | ; terminate FAT chain |
||
3112 | push edx |
||
3113 | mov eax, ecx |
||
3114 | mov edx, [fatEND] |
||
3115 | call set_FAT |
||
3116 | mov eax, edx |
||
3117 | pop edx |
||
3118 | cmp [hd_error], 0 |
||
3119 | jz @f |
||
3120 | .device_err4: |
||
3121 | pop ecx |
||
3122 | jmp .device_err3 |
||
3123 | .zero_size: |
||
3124 | and word [edi+20], 0 |
||
3125 | and word [edi+26], 0 |
||
3126 | push 0 |
||
3127 | mov eax, ecx |
||
3128 | @@: |
||
3129 | ; delete FAT chain |
||
3130 | call clear_cluster_chain |
||
3131 | cmp [hd_error], 0 |
||
3132 | jnz .device_err4 |
||
3133 | ; save directory |
||
3134 | mov eax, [esp+12] |
||
3135 | push ebx |
||
3136 | mov ebx, buffer |
||
3137 | call hd_write |
||
3138 | pop ebx |
||
3139 | cmp [hd_error], 0 |
||
3140 | jnz .device_err4 |
||
3141 | ; zero last sector, ignore errors |
||
3142 | pop ecx |
||
3143 | pop eax |
||
3144 | dec ecx |
||
3145 | imul ecx, [SECTORS_PER_CLUSTER] |
||
3146 | add ecx, [DATA_START] |
||
3147 | push eax |
||
3148 | sar eax, 9 |
||
3149 | add ecx, eax |
||
3150 | pop eax |
||
3151 | and eax, 0x1FF |
||
3152 | jz .truncate_done |
||
3153 | push ebx eax |
||
3154 | mov eax, ecx |
||
3155 | mov ebx, buffer |
||
3156 | call hd_read |
||
3157 | pop eax |
||
3158 | lea edi, [buffer+eax] |
||
3159 | push ecx |
||
3160 | mov ecx, 0x200 |
||
3161 | sub ecx, eax |
||
3162 | xor eax, eax |
||
3163 | rep stosb |
||
3164 | pop eax |
||
3165 | call hd_write |
||
3166 | pop ebx |
||
3167 | .truncate_done: |
||
3168 | pop ecx eax edi |
||
3169 | call update_disk |
||
3170 | xor eax, eax |
||
3171 | cmp [hd_error], 0 |
||
3172 | jz @f |
||
3173 | mov al, 11 |
||
3174 | @@: |
||
3175 | ret |
||
3176 | |||
86 | diamond | 3177 | fs_HdGetFileInfo: |
256 | diamond | 3178 | cmp [fs_type], 1 |
3179 | jz ntfs_HdGetFileInfo |
||
3180 | cmp [fs_type], 16 |
||
3181 | jz @f |
||
3182 | cmp [fs_type], 32 |
||
3183 | jz @f |
||
86 | diamond | 3184 | mov eax, ERROR_UNKNOWN_FS |
3185 | ret |
||
3186 | @@: |
||
3187 | cmp byte [esi], 0 |
||
3188 | jnz @f |
||
3189 | mov eax, 2 |
||
3190 | ret |
||
3191 | @@: |
||
3192 | push edi |
||
3193 | call hd_find_lfn |
||
3194 | pushfd |
||
3195 | cmp [hd_error], 0 |
||
3196 | jz @f |
||
3197 | popfd |
||
3198 | pop edi |
||
3199 | mov eax, 11 |
||
3200 | ret |
||
3201 | @@: |
||
3202 | popfd |
||
3203 | jmp fs_GetFileInfo_finish |
||
3204 | |||
3205 | fs_HdSetFileInfo: |
||
256 | diamond | 3206 | cmp [fs_type], 1 |
3207 | jz ntfs_HdSetFileInfo |
||
3208 | cmp [fs_type], 16 |
||
3209 | jz @f |
||
3210 | cmp [fs_type], 32 |
||
3211 | jz @f |
||
86 | diamond | 3212 | mov eax, ERROR_UNKNOWN_FS |
3213 | ret |
||
3214 | @@: |
||
3215 | cmp byte [esi], 0 |
||
3216 | jnz @f |
||
3217 | mov eax, 2 |
||
3218 | ret |
||
3219 | @@: |
||
3220 | push edi |
||
3221 | call hd_find_lfn |
||
3222 | pushfd |
||
3223 | cmp [hd_error], 0 |
||
3224 | jz @f |
||
3225 | popfd |
||
3226 | pop edi |
||
3227 | mov eax, 11 |
||
3228 | ret |
||
3229 | @@: |
||
3230 | popfd |
||
3231 | jnc @f |
||
3232 | pop edi |
||
3233 | mov eax, ERROR_FILE_NOT_FOUND |
||
3234 | ret |
||
3235 | @@: |
||
3236 | push eax |
||
3237 | call bdfe_to_fat_entry |
||
3238 | pop eax |
||
3239 | mov ebx, buffer |
||
3240 | call hd_write |
||
3241 | call update_disk |
||
3242 | pop edi |
||
3243 | xor eax, eax |
||
3244 | ret |
||
3245 | |||
256 | diamond | 3246 | if 0 ; starting from revision 237 execute is implemented in taskman.inc |
3247 | ; through fs_XxxGetFileInfo and fs_XxxRead |
||
91 | diamond | 3248 | ;---------------------------------------------------------------- |
3249 | ; |
||
3250 | ; fs_HdExecute - LFN variant for executing from harddisk |
||
3251 | ; |
||
3252 | ; esi points to hd filename (e.g. 'dir1/name') |
||
3253 | ; ebp points to full filename (e.g. '/hd0/1/dir1/name') |
||
3254 | ; dword [ebx] = flags |
||
3255 | ; dword [ebx+4] = cmdline |
||
3256 | ; |
||
3257 | ; ret ebx,edx destroyed |
||
3258 | ; eax > 0 - PID, < 0 - error |
||
3259 | ; |
||
3260 | ;-------------------------------------------------------------- |
||
3261 | fs_HdExecute: |
||
3262 | mov edx, [ebx] |
||
3263 | mov ebx, [ebx+4] |
||
3264 | test ebx, ebx |
||
3265 | jz @f |
||
3266 | add ebx, std_application_base_address |
||
3267 | @@: |
||
3268 | |||
3269 | ;---------------------------------------------------------------- |
||
3270 | ; |
||
3271 | ; fs_HdExecute.flags - second entry |
||
3272 | ; |
||
3273 | ; esi points to floppy filename (kernel address) |
||
3274 | ; ebp points to full filename |
||
3275 | ; edx flags |
||
3276 | ; ebx cmdline (kernel address) |
||
3277 | ; |
||
3278 | ; ret eax > 0 - PID, < 0 - error |
||
3279 | ; |
||
3280 | ;-------------------------------------------------------------- |
||
3281 | |||
3282 | .flags: |
||
3283 | cmp [fat_type], 0 |
||
3284 | jnz @f |
||
171 | diamond | 3285 | mov eax, -ERROR_UNKNOWN_FS |
91 | diamond | 3286 | ret |
3287 | @@: |
||
3288 | cmp byte [esi], 0 |
||
3289 | jnz @f |
||
3290 | ; cannot execute root! |
||
3291 | mov eax, -ERROR_ACCESS_DENIED |
||
3292 | ret |
||
3293 | @@: |
||
3294 | push edi |
||
3295 | call hd_find_lfn |
||
3296 | jnc .found |
||
3297 | pop edi |
||
3298 | mov eax, -ERROR_FILE_NOT_FOUND |
||
3299 | cmp [hd_error], 0 |
||
3300 | jz @f |
||
3301 | mov al, -11 |
||
3302 | @@: |
||
3303 | ret |
||
3304 | .found: |
||
3305 | mov eax, [edi+20-2] |
||
3306 | mov ax, [edi+26] |
||
3307 | push 0 |
||
3308 | push eax |
||
3309 | push dword [edi+28] ; size |
||
3310 | push .DoRead |
||
3311 | call fs_execute |
||
3312 | add esp, 16 |
||
3313 | pop edi |
||
3314 | ret |
||
3315 | |||
3316 | .DoRead: |
||
3317 | ; read next block |
||
3318 | ; in: eax->parameters, edi->buffer |
||
3319 | ; out: eax = error code |
||
3320 | pushad |
||
3321 | cmp dword [eax], 0 ; file size |
||
3322 | jz .eof |
||
3323 | add eax, 4 |
||
3324 | call fat_get_sector |
||
3325 | mov ebx, edi |
||
3326 | call hd_read |
||
3327 | cmp [hd_error], 0 |
||
3328 | jnz .err |
||
3329 | mov eax, [esp+28] |
||
3330 | mov ecx, [eax] |
||
3331 | sub ecx, 512 |
||
3332 | jae @f |
||
3333 | lea edi, [edi+ecx+512] |
||
3334 | neg ecx |
||
3335 | push eax |
||
3336 | xor eax, eax |
||
3337 | rep stosb |
||
3338 | pop eax |
||
3339 | @@: |
||
3340 | mov [eax], ecx |
||
3341 | mov edx, [eax+8] |
||
3342 | inc edx |
||
3343 | cmp edx, [SECTORS_PER_CLUSTER] |
||
3344 | jb @f |
||
3345 | push eax |
||
3346 | mov eax, [eax+4] |
||
3347 | call get_FAT |
||
3348 | cmp [hd_error], 0 |
||
3349 | jnz .err |
||
3350 | mov ecx, eax |
||
3351 | pop eax |
||
3352 | mov [eax+4], ecx |
||
3353 | xor edx, edx |
||
3354 | @@: |
||
3355 | mov [eax+8], edx |
||
3356 | popad |
||
3357 | xor eax, eax |
||
3358 | ret |
||
3359 | .eof: |
||
3360 | popad |
||
3361 | mov eax, 6 |
||
3362 | ret |
||
3363 | .err: |
||
3364 | popad |
||
3365 | mov eax, 11 |
||
3366 | ret |
||
256 | diamond | 3367 | end if |
91 | diamond | 3368 | |
171 | diamond | 3369 | ;---------------------------------------------------------------- |
3370 | ; |
||
3371 | ; fs_HdDelete - delete file or empty folder from hard disk |
||
3372 | ; |
||
3373 | ; esi points to filename |
||
3374 | ; |
||
3375 | ; ret eax = 0 ok or other = errormsg |
||
3376 | ; |
||
3377 | ;-------------------------------------------------------------- |
||
3378 | fs_HdDelete: |
||
256 | diamond | 3379 | cmp [fs_type], 1 |
3380 | jz ntfs_HdDelete |
||
3381 | cmp [fs_type], 16 |
||
3382 | jz @f |
||
3383 | cmp [fs_type], 32 |
||
3384 | jz @f |
||
171 | diamond | 3385 | push ERROR_UNKNOWN_FS |
3386 | .pop_ret: |
||
3387 | pop eax |
||
3388 | ret |
||
3389 | @@: |
||
3390 | cmp byte [esi], 0 |
||
3391 | jnz @f |
||
3392 | ; cannot delete root! |
||
3393 | .access_denied: |
||
3394 | push ERROR_ACCESS_DENIED |
||
3395 | jmp .pop_ret |
||
3396 | @@: |
||
3397 | and [longname_sec1], 0 |
||
3398 | and [longname_sec2], 0 |
||
3399 | push edi |
||
3400 | call hd_find_lfn |
||
3401 | jnc .found |
||
3402 | pop edi |
||
3403 | push ERROR_FILE_NOT_FOUND |
||
3404 | jmp .pop_ret |
||
3405 | .found: |
||
3406 | cmp dword [edi], '. ' |
||
3407 | jz .access_denied2 |
||
3408 | cmp dword [edi], '.. ' |
||
3409 | jz .access_denied2 |
||
3410 | test byte [edi+11], 10h |
||
3411 | jz .dodel |
||
3412 | ; we can delete only empty folders! |
||
3413 | pushad |
||
3414 | mov ebp, [edi+20-2] |
||
3415 | mov bp, [edi+26] |
||
3416 | xor ecx, ecx |
||
3417 | lea eax, [ebp-2] |
||
3418 | imul eax, [SECTORS_PER_CLUSTER] |
||
3419 | add eax, [DATA_START] |
||
3420 | mov ebx, buffer |
||
3421 | call hd_read |
||
3422 | cmp [hd_error], 0 |
||
3423 | jnz .err1 |
||
3424 | add ebx, 2*0x20 |
||
3425 | .checkempty: |
||
3426 | cmp byte [ebx], 0 |
||
3427 | jz .empty |
||
3428 | cmp byte [ebx], 0xE5 |
||
3429 | jnz .notempty |
||
3430 | add ebx, 0x20 |
||
3431 | cmp ebx, buffer+0x200 |
||
3432 | jb .checkempty |
||
3433 | inc ecx |
||
3434 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
3435 | jb @f |
||
3436 | mov eax, ebp |
||
3437 | call get_FAT |
||
3438 | cmp [hd_error], 0 |
||
3439 | jnz .err1 |
||
3440 | mov ebp, eax |
||
3441 | xor ecx, ecx |
||
3442 | @@: |
||
3443 | lea eax, [ebp-2] |
||
3444 | imul eax, [SECTORS_PER_CLUSTER] |
||
3445 | add eax, [DATA_START] |
||
3446 | add eax, ecx |
||
3447 | mov ebx, buffer |
||
3448 | call hd_read |
||
3449 | cmp [hd_error], 0 |
||
3450 | jz .checkempty |
||
3451 | .err1: |
||
3452 | popad |
||
3453 | .err2: |
||
3454 | pop edi |
||
3455 | push 11 |
||
3456 | pop eax |
||
3457 | ret |
||
3458 | .notempty: |
||
3459 | popad |
||
3460 | .access_denied2: |
||
3461 | pop edi |
||
3462 | push ERROR_ACCESS_DENIED |
||
3463 | pop eax |
||
3464 | ret |
||
3465 | .empty: |
||
3466 | popad |
||
3467 | push ebx |
||
3468 | mov ebx, buffer |
||
3469 | call hd_read |
||
3470 | pop ebx |
||
3471 | cmp [hd_error], 0 |
||
3472 | jnz .err2 |
||
3473 | .dodel: |
||
3474 | push eax |
||
3475 | mov eax, [edi+20-2] |
||
3476 | mov ax, [edi+26] |
||
3477 | xchg eax, [esp] |
||
3478 | ; delete folder entry |
||
3479 | mov byte [edi], 0xE5 |
||
3480 | ; delete LFN (if present) |
||
3481 | .lfndel: |
||
3482 | cmp edi, buffer |
||
3483 | ja @f |
||
3484 | cmp [longname_sec2], 0 |
||
3485 | jz .lfndone |
||
3486 | push [longname_sec2] |
||
3487 | push [longname_sec1] |
||
3488 | pop [longname_sec2] |
||
3489 | and [longname_sec1], 0 |
||
3490 | push ebx |
||
3491 | mov ebx, buffer |
||
3492 | call hd_write |
||
3493 | mov eax, [esp+4] |
||
3494 | call hd_read |
||
3495 | pop ebx |
||
3496 | pop eax |
||
3497 | mov edi, buffer+0x200 |
||
3498 | @@: |
||
3499 | sub edi, 0x20 |
||
3500 | cmp byte [edi], 0xE5 |
||
3501 | jz .lfndone |
||
3502 | cmp byte [edi+11], 0xF |
||
3503 | jnz .lfndone |
||
3504 | mov byte [edi], 0xE5 |
||
3505 | jmp .lfndel |
||
3506 | .lfndone: |
||
3507 | push ebx |
||
3508 | mov ebx, buffer |
||
3509 | call hd_write |
||
3510 | pop ebx |
||
3511 | ; delete FAT chain |
||
3512 | pop eax |
||
3513 | call clear_cluster_chain |
||
3514 | call update_disk |
||
3515 | pop edi |
||
3516 | xor eax, eax |
||
3517 | cmp [hd_error], 0 |
||
3518 | jz @f |
||
3519 | mov al, 11 |
||
3520 | @@: |
||
3521 | ret |
||
3522 | |||
74 | mario79 | 3523 | ; \end{diamond}>>=>=>>>> |