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Rev | Author | Line No. | Line |
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425 | victor | 1 | $Revision: 465 $ |
431 | serge | 2 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
465 | serge | 3 | ;; ;; |
431 | serge | 4 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
5 | ;; Distributed under terms of the GNU General Public License ;; |
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6 | ;; ;; |
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465 | serge | 7 | ;; FAT32.INC ;; |
8 | ;; ;; |
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9 | ;; FAT16/32 functions for KolibriOS ;; |
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10 | ;; ;; |
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11 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
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12 | ;; ;; |
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13 | ;; See file COPYING for details ;; |
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14 | ;; 04.02.2007 LFN create folder - diamond ;; |
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15 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
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16 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
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17 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
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18 | ;; 23.06.2006 LFN start application - diamond ;; |
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19 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
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20 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
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21 | ;; 04.05.2006 LFN read folder - diamond ;; |
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22 | ;; 29.04.2006 Elimination of hangup after the ;; |
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23 | ;; expiration hd_wait_timeout - Mario79 ;; |
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24 | ;; 23.04.2006 LFN read file - diamond ;; |
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25 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
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26 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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27 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
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28 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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29 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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30 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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31 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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32 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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33 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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34 | ;; 08.11.2004 rename - ATV ;; |
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35 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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36 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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37 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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38 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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39 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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40 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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41 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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42 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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43 | ;; 20.5.2002 Hd status check - VT ;; |
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44 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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45 | ;; ;; |
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431 | serge | 46 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ha | 47 | |
48 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
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49 | |||
52 | mikedld | 50 | ERROR_SUCCESS = 0 |
51 | ERROR_DISK_BASE = 1 |
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52 | ERROR_UNSUPPORTED_FS = 2 |
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53 | ERROR_UNKNOWN_FS = 3 |
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54 | ERROR_PARTITION = 4 |
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55 | ERROR_FILE_NOT_FOUND = 5 |
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56 | ERROR_END_OF_FILE = 6 |
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57 | ERROR_MEMORY_POINTER = 7 |
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58 | ERROR_DISK_FULL = 8 |
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59 | ERROR_FAT_TABLE = 9 |
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60 | ERROR_ACCESS_DENIED = 10 |
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1 | ha | 61 | |
62 | PUSHAD_EAX equ [esp+28] |
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63 | PUSHAD_ECX equ [esp+24] |
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64 | PUSHAD_EDX equ [esp+20] |
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65 | PUSHAD_EBX equ [esp+16] |
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66 | PUSHAD_EBP equ [esp+8] |
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67 | PUSHAD_ESI equ [esp+4] |
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68 | PUSHAD_EDI equ [esp+0] |
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69 | |||
171 | diamond | 70 | uglobal |
71 | align 4 |
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1 | ha | 72 | cluster dd 0 ; used by file_write,makedir,append |
73 | partition_count dd 0 ; partitions found by set_FAT32_variables |
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74 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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75 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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76 | |||
77 | hd_error dd 0 ; set by wait_for_sector_buffer |
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78 | hd_setup dd 0 |
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79 | hd_wait_timeout dd 0 |
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80 | |||
81 | cluster_tmp dd 0 ; used by analyze_directory |
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82 | ; and analyze_directory_to_write |
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83 | |||
84 | file_size dd 0 ; used by file_read |
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85 | |||
86 | sector_tmp dd 0 ; used by rename,append,file_write |
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87 | entry_pos dd 0 ; used by rename,append,file_write |
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88 | |||
89 | old_filesize dd 0 ; used by append |
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90 | new_filepos dd 0 ; used by append |
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91 | bytes2write dd 0 ; used by append |
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92 | |||
93 | cache_search_start dd 0 ; used by find_empty_slot |
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171 | diamond | 94 | endg |
1 | ha | 95 | |
171 | diamond | 96 | iglobal |
1 | ha | 97 | fat_in_cache dd -1 |
171 | diamond | 98 | endg |
1 | ha | 99 | |
100 | uglobal |
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171 | diamond | 101 | align 4 |
102 | fat_cache: times 512 db 0 |
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1 | ha | 103 | Sector512: ; label for dev_hdcd.inc |
104 | buffer: times 512 db 0 |
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133 | diamond | 105 | fsinfo_buffer: times 512 db 0 |
1 | ha | 106 | endg |
107 | |||
108 | uglobal |
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109 | dir_entry: times 32 db 0 |
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110 | |||
111 | startpath: times 255 db 0 |
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112 | |||
113 | fat16_root db 0 ; flag for fat16 rootdir |
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114 | fat_change db 0 ; 1=fat has changed |
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115 | |||
116 | endg |
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117 | |||
118 | reserve_hd1: |
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119 | |||
120 | cli |
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121 | cmp [hd1_status],0 |
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122 | je reserve_ok1 |
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123 | |||
124 | sti |
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125 | call change_task |
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126 | jmp reserve_hd1 |
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127 | |||
128 | reserve_ok1: |
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129 | |||
130 | push eax |
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379 | serge | 131 | mov eax,[CURRENT_TASK] |
1 | ha | 132 | shl eax,5 |
379 | serge | 133 | mov eax,[eax+CURRENT_TASK+TASKDATA.pid] |
1 | ha | 134 | mov [hd1_status],eax |
135 | pop eax |
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136 | sti |
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137 | ret |
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95 | mario79 | 138 | ;******************************************** |
321 | diamond | 139 | |
140 | uglobal |
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141 | hd_in_cache db ? |
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142 | endg |
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143 | |||
95 | mario79 | 144 | reserve_hd_channel: |
145 | cmp [hdbase], 0x1F0 |
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146 | jne .IDE_Channel_2 |
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147 | .IDE_Channel_1: |
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148 | cli |
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149 | cmp [IDE_Channel_1],0 |
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150 | je .reserve_ok_1 |
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151 | sti |
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152 | call change_task |
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153 | jmp .IDE_Channel_1 |
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154 | .IDE_Channel_2: |
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155 | cli |
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156 | cmp [IDE_Channel_2],0 |
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157 | je .reserve_ok_2 |
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158 | sti |
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159 | call change_task |
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321 | diamond | 160 | jmp .IDE_Channel_2 |
95 | mario79 | 161 | .reserve_ok_1: |
321 | diamond | 162 | mov [IDE_Channel_1], 1 |
163 | push eax |
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164 | mov al, 1 |
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165 | jmp @f |
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95 | mario79 | 166 | .reserve_ok_2: |
321 | diamond | 167 | mov [IDE_Channel_2], 1 |
168 | push eax |
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169 | mov al, 3 |
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170 | @@: |
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171 | cmp [hdid], 1 |
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172 | sbb al, -1 |
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173 | cmp al, [hd_in_cache] |
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174 | jz @f |
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175 | mov [hd_in_cache], al |
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176 | call clear_hd_cache |
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177 | @@: |
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178 | pop eax |
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179 | ret |
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180 | |||
95 | mario79 | 181 | free_hd_channel: |
182 | cmp [hdbase], 0x1F0 |
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183 | jne .IDE_Channel_2 |
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184 | .IDE_Channel_1: |
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185 | mov [IDE_Channel_1],0 |
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186 | ret |
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187 | .IDE_Channel_2: |
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188 | mov [IDE_Channel_2],0 |
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189 | ret |
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190 | ;******************************************** |
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379 | serge | 191 | problem_partition db 0 ; used for partitions search |
1 | ha | 192 | |
65 | mario79 | 193 | include 'part_set.inc' |
1 | ha | 194 | |
195 | set_FAT: |
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196 | ;-------------------------------- |
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197 | ; input : EAX = cluster |
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198 | ; EDX = value to save |
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199 | ; output : EDX = old value |
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200 | ;-------------------------------- |
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201 | push eax ebx esi |
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202 | |||
203 | cmp eax,2 |
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204 | jb sfc_error |
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205 | cmp eax,[LAST_CLUSTER] |
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206 | ja sfc_error |
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256 | diamond | 207 | cmp [fs_type],16 |
1 | ha | 208 | je sfc_1 |
209 | add eax,eax |
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210 | sfc_1: |
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211 | add eax,eax |
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212 | mov esi,511 |
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213 | and esi,eax ; esi = position in fat sector |
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214 | shr eax,9 ; eax = fat sector |
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215 | add eax,[FAT_START] |
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216 | mov ebx,fat_cache |
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217 | |||
218 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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219 | je sfc_in_cache ; yes |
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220 | |||
221 | cmp [fat_change],0 ; is fat changed? |
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222 | je sfc_no_change ; no |
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223 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 224 | cmp [hd_error],0 |
225 | jne sfc_error |
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1 | ha | 226 | |
227 | sfc_no_change: |
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228 | mov [fat_in_cache],eax ; save fat sector |
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229 | call hd_read |
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74 | mario79 | 230 | cmp [hd_error],0 |
231 | jne sfc_error |
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1 | ha | 232 | |
379 | serge | 233 | |
1 | ha | 234 | sfc_in_cache: |
256 | diamond | 235 | cmp [fs_type],16 |
1 | ha | 236 | jne sfc_test32 |
237 | |||
238 | sfc_set16: |
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239 | xchg [ebx+esi],dx ; save new value and get old value |
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240 | jmp sfc_write |
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241 | |||
242 | sfc_test32: |
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243 | mov eax,[fatMASK] |
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244 | |||
245 | sfc_set32: |
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246 | and edx,eax |
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247 | xor eax,-1 ; mask for high bits |
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248 | and eax,[ebx+esi] ; get high 4 bits |
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249 | or eax,edx |
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250 | mov edx,[ebx+esi] ; get old value |
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251 | mov [ebx+esi],eax ; save new value |
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252 | |||
253 | sfc_write: |
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254 | mov [fat_change],1 ; fat has changed |
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255 | |||
256 | sfc_nonzero: |
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257 | and edx,[fatMASK] |
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258 | |||
259 | sfc_error: |
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260 | pop esi ebx eax |
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261 | ret |
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262 | |||
263 | |||
264 | get_FAT: |
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265 | ;-------------------------------- |
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266 | ; input : EAX = cluster |
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267 | ; output : EAX = next cluster |
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268 | ;-------------------------------- |
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269 | push ebx esi |
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270 | |||
256 | diamond | 271 | cmp [fs_type],16 |
1 | ha | 272 | je gfc_1 |
273 | add eax,eax |
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274 | gfc_1: |
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275 | add eax,eax |
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276 | mov esi,511 |
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277 | and esi,eax ; esi = position in fat sector |
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278 | shr eax,9 ; eax = fat sector |
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279 | add eax,[FAT_START] |
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280 | mov ebx,fat_cache |
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281 | |||
282 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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283 | je gfc_in_cache |
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284 | |||
285 | cmp [fat_change],0 ; is fat changed? |
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286 | je gfc_no_change ; no |
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287 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 288 | cmp [hd_error],0 |
289 | jne hd_error_01 |
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1 | ha | 290 | |
291 | gfc_no_change: |
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292 | mov [fat_in_cache],eax |
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293 | call hd_read |
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74 | mario79 | 294 | cmp [hd_error],0 |
295 | jne hd_error_01 |
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1 | ha | 296 | |
297 | gfc_in_cache: |
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298 | mov eax,[ebx+esi] |
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299 | and eax,[fatMASK] |
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74 | mario79 | 300 | hd_error_01: |
1 | ha | 301 | pop esi ebx |
302 | ret |
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303 | |||
304 | |||
305 | get_free_FAT: |
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306 | ;----------------------------------------------------------- |
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307 | ; input : EAX = # cluster for start the searching |
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308 | ; output : if CARRY=0 EAX = # first cluster found free |
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309 | ; if CARRY=1 disk full |
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310 | ; Note : for more speed need to use fat_cache directly |
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311 | ;----------------------------------------------------------- |
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312 | push ecx |
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313 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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314 | sub ecx,2 |
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315 | |||
316 | gff_test: |
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317 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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318 | jbe gff_in_range |
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319 | mov eax,2 |
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320 | |||
321 | gff_in_range: |
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322 | push eax |
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323 | call get_FAT ; get cluster state |
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74 | mario79 | 324 | cmp [hd_error],0 |
325 | jne gff_not_found_1 |
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326 | |||
1 | ha | 327 | test eax,eax ; is it free? |
328 | pop eax |
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329 | je gff_found ; yes |
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330 | inc eax ; next cluster |
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331 | dec ecx ; is all checked? |
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332 | jns gff_test ; no |
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333 | |||
74 | mario79 | 334 | gff_not_found_1: |
335 | add esp,4 |
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1 | ha | 336 | gff_not_found: |
337 | pop ecx ; yes. disk is full |
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338 | stc |
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339 | ret |
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340 | |||
341 | gff_found: |
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342 | pop ecx |
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343 | clc |
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344 | ret |
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345 | |||
346 | |||
347 | write_fat_sector: |
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348 | ;----------------------------------------------------------- |
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349 | ; write changed fat to disk |
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350 | ;----------------------------------------------------------- |
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351 | push eax ebx ecx |
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352 | |||
353 | mov [fat_change],0 |
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354 | mov eax,[fat_in_cache] |
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355 | cmp eax,-1 |
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356 | jz write_fat_not_used |
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357 | mov ebx,fat_cache |
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358 | mov ecx,[NUMBER_OF_FATS] |
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359 | |||
360 | write_next_fat: |
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361 | call hd_write |
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74 | mario79 | 362 | cmp [hd_error],0 |
363 | jne write_fat_not_used |
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364 | |||
1 | ha | 365 | add eax,[SECTORS_PER_FAT] |
366 | dec ecx |
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367 | jnz write_next_fat |
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368 | |||
369 | write_fat_not_used: |
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370 | pop ecx ebx eax |
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371 | ret |
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372 | |||
373 | |||
374 | analyze_directory: |
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375 | ;----------------------------------------------------------- |
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376 | ; input : EAX = first cluster of the directory |
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377 | ; EBX = pointer to filename |
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378 | ; output : IF CARRY=0 EAX = sector where th file is found |
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379 | ; EBX = pointer in buffer |
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380 | ; [buffer .. buffer+511] |
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381 | ; ECX,EDX,ESI,EDI not changed |
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382 | ; IF CARRY=1 filename not found |
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383 | ; Note : if cluster=0 it's changed to read rootdir |
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384 | ; save 2 previous directory sectors in longname_sec |
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385 | ;----------------------------------------------------------- |
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386 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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387 | mov [longname_sec1],0 |
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388 | mov [longname_sec2],0 |
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389 | |||
390 | adr_new_cluster: |
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391 | mov [cluster_tmp],eax |
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392 | mov [fat16_root],0 |
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393 | cmp eax,[LAST_CLUSTER] |
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394 | ja adr_not_found ; too big cluster number, something is wrong |
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395 | cmp eax,2 |
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396 | jnb adr_data_cluster |
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397 | |||
398 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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256 | diamond | 399 | cmp [fs_type],16 |
1 | ha | 400 | jne adr_data_cluster |
401 | mov eax,[ROOT_START] |
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402 | mov edx,[ROOT_SECTORS] |
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403 | mov [fat16_root],1 ; flag for fat16 rootdir |
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404 | jmp adr_new_sector |
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405 | |||
406 | adr_data_cluster: |
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407 | sub eax,2 |
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408 | mov edx,[SECTORS_PER_CLUSTER] |
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409 | imul eax,edx |
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410 | add eax,[DATA_START] |
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411 | |||
412 | adr_new_sector: |
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413 | mov ebx,buffer |
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414 | call hd_read |
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74 | mario79 | 415 | cmp [hd_error],0 |
416 | jne adr_not_found |
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417 | |||
1 | ha | 418 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
419 | |||
420 | adr_analyze: |
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421 | mov edi,[ebx+11] ; file attribute |
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422 | and edi,0xf |
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423 | cmp edi,0xf |
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424 | je adr_long_filename |
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425 | test edi,0x8 ; skip over volume label |
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426 | jne adr_long_filename ; Note: label can be same name as file/dir |
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427 | |||
428 | mov esi,[esp+0] ; filename need to be uppercase |
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429 | mov edi,ebx |
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430 | push ecx |
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431 | mov ecx,11 |
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432 | cld |
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433 | rep cmpsb ; compare 8+3 filename |
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434 | pop ecx |
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435 | je adr_found |
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436 | |||
437 | adr_long_filename: |
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438 | add ebx,32 ; position of next dir entry |
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439 | dec ecx |
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440 | jnz adr_analyze |
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441 | |||
442 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
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443 | mov [longname_sec1],eax ; for delete long filename |
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444 | mov [longname_sec2],ecx |
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445 | inc eax ; next sector |
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446 | dec edx |
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447 | jne adr_new_sector |
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448 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
449 | je adr_not_found |
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450 | |||
451 | adr_next_cluster: |
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452 | mov eax,[cluster_tmp] |
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453 | call get_FAT ; get next cluster |
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74 | mario79 | 454 | cmp [hd_error],0 |
455 | jne adr_not_found |
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456 | |||
1 | ha | 457 | cmp eax,2 ; incorrect fat chain? |
458 | jb adr_not_found ; yes |
||
459 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
460 | jb adr_new_cluster ; no. analyse it |
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461 | |||
462 | adr_not_found: |
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463 | pop edi edi esi edx ecx ; first edi will remove ebx |
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464 | stc ; file not found |
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465 | ret |
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466 | |||
467 | adr_found: |
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468 | pop edi edi esi edx ecx ; first edi will remove ebx |
||
469 | clc ; file found |
||
470 | ret |
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471 | |||
472 | |||
473 | analyze_directory_to_write: |
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474 | ;----------------------------------------------------------- |
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475 | ; input : EAX = first cluster of the directory |
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476 | ; output : IF CARRY=0 EAX = sector where the empty pos is found |
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477 | ; EBX = pointer in buffer |
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478 | ; [buffer .. buffer+511] |
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479 | ; ECX,EDX,ESI,EDI not changed |
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480 | ; IF CARRY=1 disk full or fat corrupted |
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481 | ; Note : if cluster=0 it's changed to read rootdir |
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482 | ;----------------------------------------------------------- |
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483 | push ecx edx edi |
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484 | |||
485 | adw_new_cluster: |
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486 | mov [cluster_tmp],eax |
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487 | mov [fat16_root],0 |
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488 | cmp eax,[LAST_CLUSTER] |
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489 | ja adw_not_found ; too big cluster number, something is wrong |
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490 | cmp eax,2 |
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491 | jnb adw_data_cluster |
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492 | |||
493 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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256 | diamond | 494 | cmp [fs_type],16 |
1 | ha | 495 | jne adw_data_cluster |
496 | mov eax,[ROOT_START] |
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497 | mov edx,[ROOT_SECTORS] |
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498 | mov [fat16_root],1 ; flag for fat16 rootdir |
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499 | jmp adw_new_sector |
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500 | |||
501 | adw_data_cluster: |
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502 | sub eax,2 |
||
503 | mov edx,[SECTORS_PER_CLUSTER] |
||
504 | imul eax,edx |
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505 | add eax,[DATA_START] |
||
506 | |||
507 | adw_new_sector: |
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508 | mov ebx,buffer |
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509 | call hd_read |
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74 | mario79 | 510 | cmp [hd_error],0 |
511 | jne adw_not_found |
||
512 | |||
1 | ha | 513 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
514 | |||
515 | adw_analyze: |
||
516 | cmp byte [ebx],0x00 ; is free entry? |
||
517 | je adw_found ; yes |
||
518 | cmp byte [ebx],0xe5 ; is deleted entry? |
||
519 | je adw_found ; yes |
||
520 | add ebx,32 ; position of next dir entry |
||
521 | dec ecx |
||
522 | jnz adw_analyze |
||
523 | |||
524 | inc eax ; next sector |
||
525 | dec edx |
||
526 | jne adw_new_sector |
||
527 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
528 | je adw_not_found |
||
529 | |||
530 | mov eax,[cluster_tmp] |
||
531 | call get_FAT ; get next cluster |
||
74 | mario79 | 532 | cmp [hd_error],0 |
533 | jne adw_not_found |
||
534 | |||
1 | ha | 535 | cmp eax,2 ; incorrect fat chain? |
536 | jb adw_not_found ; yes |
||
537 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
538 | jb adw_new_cluster ; no. analyse it |
||
539 | |||
540 | mov eax,2 ; this block of code add a new cluster |
||
541 | call get_free_FAT ; for the directory because the directory |
||
542 | jc adw_not_found ; is full |
||
543 | |||
544 | mov edx,[fatEND] ; new end for directory |
||
545 | call set_FAT |
||
74 | mario79 | 546 | cmp [hd_error],0 |
547 | jne adw_not_found |
||
1 | ha | 548 | |
549 | push eax ; save new cluster |
||
550 | mov edx,eax |
||
551 | mov eax,[cluster_tmp] ; change last cluster to point new cluster |
||
552 | call set_FAT |
||
74 | mario79 | 553 | cmp [hd_error],0 |
554 | jne adw_not_found_1 |
||
555 | |||
1 | ha | 556 | mov ecx,-1 ; remove 1 cluster from free disk space |
557 | call add_disk_free_space |
||
74 | mario79 | 558 | cmp [hd_error],0 |
559 | jne adw_not_found_1 |
||
1 | ha | 560 | |
561 | mov ecx,512/4 |
||
562 | xor eax,eax |
||
563 | mov edi,buffer |
||
564 | cld |
||
565 | rep stosd ; clear new directory cluster |
||
566 | pop eax |
||
567 | |||
568 | sub eax,2 |
||
569 | mov ecx,[SECTORS_PER_CLUSTER] |
||
570 | imul eax,ecx |
||
571 | add eax,[DATA_START] |
||
572 | mov ebx,buffer |
||
573 | push eax ; save sector number |
||
574 | |||
575 | adw_set_empty_directory: |
||
576 | call hd_write |
||
74 | mario79 | 577 | cmp [hd_error],0 |
578 | jne adw_not_found_1 |
||
579 | |||
1 | ha | 580 | inc eax ; next sector |
581 | dec ecx |
||
582 | jnz adw_set_empty_directory |
||
583 | |||
584 | pop eax |
||
585 | |||
586 | adw_found: |
||
587 | pop edi edx ecx |
||
588 | clc ; free space found |
||
589 | ret |
||
74 | mario79 | 590 | adw_not_found_1: |
591 | add esp,4 |
||
1 | ha | 592 | adw_not_found: |
593 | pop edi edx ecx |
||
594 | stc ; free space not found |
||
595 | ret |
||
596 | |||
597 | |||
598 | get_data_cluster: |
||
599 | ;----------------------------------------------------------- |
||
600 | ; input : EAX = cluster |
||
601 | ; EBX = pointer to buffer |
||
602 | ; EDX = # blocks to read in buffer |
||
603 | ; ESI = # blocks to skip over |
||
604 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
605 | ; if CARRY=1 cluster out of range |
||
606 | ; Note : if cluster=0 it's changed to read rootdir |
||
607 | ;----------------------------------------------------------- |
||
608 | push eax ecx |
||
609 | |||
610 | mov [fat16_root],0 |
||
611 | cmp eax,[LAST_CLUSTER] |
||
612 | ja gdc_error ; too big cluster number, something is wrong |
||
613 | cmp eax,2 |
||
614 | jnb gdc_cluster |
||
615 | |||
616 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
256 | diamond | 617 | cmp [fs_type],16 |
1 | ha | 618 | jne gdc_cluster |
619 | mov eax,[ROOT_START] |
||
620 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
621 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
622 | jmp gdc_read |
||
623 | |||
624 | gdc_cluster: |
||
625 | sub eax,2 |
||
626 | mov ecx,[SECTORS_PER_CLUSTER] |
||
627 | imul eax,ecx |
||
628 | add eax,[DATA_START] |
||
629 | |||
630 | gdc_read: |
||
631 | test esi,esi ; first wanted block |
||
632 | je gdcl1 ; yes, skip count is 0 |
||
633 | dec esi |
||
634 | jmp gdcl2 |
||
635 | |||
636 | gdcl1: |
||
637 | call hd_read |
||
74 | mario79 | 638 | cmp [hd_error],0 |
379 | serge | 639 | jne gdc_error |
74 | mario79 | 640 | |
1 | ha | 641 | add ebx,512 ; update pointer |
642 | dec edx |
||
643 | |||
644 | gdcl2: |
||
645 | test edx,edx ; is all read? |
||
646 | je out_of_read |
||
647 | |||
648 | inc eax ; next sector |
||
649 | dec ecx |
||
650 | jnz gdc_read |
||
651 | |||
652 | out_of_read: |
||
653 | pop ecx eax |
||
654 | clc |
||
655 | ret |
||
656 | |||
657 | gdc_error: |
||
658 | pop ecx eax |
||
659 | stc |
||
660 | ret |
||
661 | |||
662 | |||
663 | set_data_cluster: |
||
664 | ;----------------------------------------------------------- |
||
665 | ; input : EAX = cluster |
||
666 | ; EBX = pointer to buffer |
||
667 | ; output : if CARRY=0 ok |
||
668 | ; if CARRY=1 cluster out of range |
||
669 | ;----------------------------------------------------------- |
||
670 | push eax ebx edx |
||
671 | |||
672 | cmp eax,[LAST_CLUSTER] |
||
673 | ja sdc_error ; too big cluster number, something is wrong |
||
674 | sub eax,2 |
||
675 | jb sdc_error ; don't allow rootdir write |
||
676 | |||
677 | mov edx,[SECTORS_PER_CLUSTER] |
||
678 | imul eax,edx |
||
679 | add eax,[DATA_START] |
||
680 | |||
681 | sdc_write: |
||
682 | call hd_write |
||
74 | mario79 | 683 | cmp [hd_error],0 |
684 | jne sdc_error |
||
685 | |||
1 | ha | 686 | add ebx,512 ; update pointer |
687 | inc eax |
||
688 | dec edx |
||
689 | jnz sdc_write |
||
690 | pop edx ebx eax |
||
691 | clc |
||
692 | ret |
||
693 | |||
694 | sdc_error: |
||
695 | pop edx ebx eax |
||
696 | stc |
||
697 | ret |
||
698 | |||
699 | |||
700 | get_cluster_of_a_path: |
||
701 | ;--------------------------------------------------------- |
||
702 | ; input : EBX = pointer to a path string |
||
703 | ; (example: the path "/files/data/document" become |
||
704 | ; "files......data.......document...0" |
||
705 | ; '.' = space char |
||
706 | ; '0' = char(0) (ASCII=0) !!! ) |
||
707 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
708 | ; if (CARRY=0) -> EAX=cluster |
||
709 | ;--------------------------------------------------------- |
||
710 | push ebx edx |
||
711 | |||
712 | mov eax,[ROOT_CLUSTER] |
||
713 | mov edx,ebx |
||
714 | |||
715 | search_end_of_path: |
||
716 | cmp byte [edx],0 |
||
717 | je found_end_of_path |
||
718 | |||
719 | inc edx ; '/' |
||
720 | mov ebx,edx |
||
721 | call analyze_directory |
||
722 | jc directory_not_found |
||
723 | |||
724 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
725 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
726 | and eax,[fatMASK] |
||
727 | add edx,11 ; 8+3 (name+extension) |
||
728 | jmp search_end_of_path |
||
729 | |||
730 | found_end_of_path: |
||
731 | pop edx ebx |
||
732 | clc ; no errors |
||
733 | ret |
||
734 | |||
735 | directory_not_found: |
||
736 | pop edx ebx |
||
737 | stc ; errors occour |
||
738 | ret |
||
739 | |||
740 | |||
741 | bcd2bin: |
||
742 | ;---------------------------------- |
||
743 | ; input : AL=BCD number (eg. 0x11) |
||
744 | ; output : AH=0 |
||
745 | ; AL=decimal number (eg. 11) |
||
746 | ;---------------------------------- |
||
747 | xor ah,ah |
||
748 | shl ax,4 |
||
749 | shr al,4 |
||
750 | aad |
||
751 | ret |
||
752 | |||
753 | |||
754 | get_date_for_file: |
||
755 | ;----------------------------------------------------- |
||
756 | ; Get date from CMOS and pack day,month,year in AX |
||
757 | ; DATE bits 0..4 : day of month 0..31 |
||
758 | ; 5..8 : month of year 1..12 |
||
759 | ; 9..15 : count of years from 1980 |
||
760 | ;----------------------------------------------------- |
||
761 | mov al,0x7 ;day |
||
762 | out 0x70,al |
||
763 | in al,0x71 |
||
764 | call bcd2bin |
||
765 | ror eax,5 |
||
766 | |||
767 | mov al,0x8 ;month |
||
768 | out 0x70,al |
||
769 | in al,0x71 |
||
770 | call bcd2bin |
||
771 | ror eax,4 |
||
772 | |||
773 | mov al,0x9 ;year |
||
774 | out 0x70,al |
||
775 | in al,0x71 |
||
776 | call bcd2bin |
||
777 | add ax,20 ;because CMOS return only the two last |
||
778 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
779 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
780 | ret |
||
781 | |||
782 | |||
783 | get_time_for_file: |
||
784 | ;----------------------------------------------------- |
||
785 | ; Get time from CMOS and pack hour,minute,second in AX |
||
786 | ; TIME bits 0..4 : second (the low bit is lost) |
||
787 | ; 5..10 : minute 0..59 |
||
788 | ; 11..15 : hour 0..23 |
||
789 | ;----------------------------------------------------- |
||
790 | mov al,0x0 ;second |
||
791 | out 0x70,al |
||
792 | in al,0x71 |
||
793 | call bcd2bin |
||
794 | ror eax,6 |
||
795 | |||
796 | mov al,0x2 ;minute |
||
797 | out 0x70,al |
||
798 | in al,0x71 |
||
799 | call bcd2bin |
||
800 | ror eax,6 |
||
801 | |||
802 | mov al,0x4 ;hour |
||
803 | out 0x70,al |
||
804 | in al,0x71 |
||
805 | call bcd2bin |
||
806 | rol eax,11 |
||
807 | ret |
||
808 | |||
809 | |||
810 | set_current_time_for_entry: |
||
811 | ;----------------------------------------------------- |
||
812 | ; Set current time/date for file entry |
||
813 | ; input : ebx = file entry pointer |
||
814 | ;----------------------------------------------------- |
||
815 | push eax |
||
816 | call get_time_for_file ; update files date/time |
||
817 | mov [ebx+22],ax |
||
818 | call get_date_for_file |
||
819 | mov [ebx+24],ax |
||
820 | pop eax |
||
821 | ret |
||
822 | |||
823 | |||
824 | |||
825 | add_disk_free_space: |
||
826 | ;----------------------------------------------------- |
||
827 | ; input : ecx = cluster count |
||
828 | ; Note : negative = remove clusters from free space |
||
829 | ; positive = add clusters to free space |
||
830 | ;----------------------------------------------------- |
||
831 | test ecx,ecx ; no change |
||
832 | je add_dfs_no |
||
256 | diamond | 833 | cmp [fs_type],32 ; free disk space only used by fat32 |
1 | ha | 834 | jne add_dfs_no |
835 | |||
836 | push eax ebx |
||
837 | mov eax,[ADR_FSINFO] |
||
133 | diamond | 838 | mov ebx,fsinfo_buffer |
1 | ha | 839 | call hd_read |
74 | mario79 | 840 | cmp [hd_error],0 |
841 | jne add_not_fs |
||
842 | |||
1 | ha | 843 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
844 | jne add_not_fs |
||
845 | |||
846 | add [ebx+0x1e8],ecx |
||
847 | call hd_write |
||
133 | diamond | 848 | ; cmp [hd_error],0 |
849 | ; jne add_not_fs |
||
1 | ha | 850 | |
851 | add_not_fs: |
||
852 | pop ebx eax |
||
853 | |||
854 | add_dfs_no: |
||
855 | ret |
||
856 | |||
857 | |||
858 | file_write: |
||
859 | ;-------------------------------------------------------------------------- |
||
860 | ; INPUT : user-reg register-in-this meaning symbol-in-this-routine |
||
861 | ; |
||
862 | ; EAX EDI system call to write / |
||
863 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
864 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
865 | ; ECX EBX (PAR2) file size PAR2 |
||
866 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
867 | ; |
||
868 | ; output : eax = 0 - ok |
||
869 | ; 3 - unknown FS |
||
870 | ; 5 - file not found |
||
871 | ; 8 - disk full |
||
872 | ; 10 - access denied |
||
873 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 874 | cmp [fs_type], 16 |
875 | jz fat_ok_for_writing |
||
876 | cmp [fs_type], 32 |
||
877 | jz fat_ok_for_writing |
||
878 | push ERROR_UNKNOWN_FS |
||
879 | pop eax |
||
880 | ret |
||
1 | ha | 881 | |
882 | fat_ok_for_writing: |
||
883 | ; call reserve_hd1 |
||
884 | |||
885 | pushad |
||
886 | |||
887 | xor edi,edi ; don't allow directory remove |
||
888 | call file_delete ; try to delete the file first |
||
74 | mario79 | 889 | cmp [hd_error],0 |
890 | jne exit_write_access_1 |
||
891 | |||
1 | ha | 892 | test eax,eax |
893 | jz old_deleted ; deleted ok |
||
894 | cmp eax,ERROR_FILE_NOT_FOUND |
||
895 | jnz exit_write_access ; it exist but can't delete |
||
896 | |||
897 | old_deleted: |
||
898 | mov ebx,PUSHAD_EDX |
||
899 | call get_cluster_of_a_path |
||
900 | jnc found_directory_for_writing |
||
74 | mario79 | 901 | cmp [hd_error],0 |
902 | jne exit_write_access |
||
1 | ha | 903 | |
904 | exit_writing_with_error: |
||
905 | popad |
||
906 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 907 | cmp [hd_error],0 |
908 | jne exit_write_access_2 |
||
909 | |||
1 | ha | 910 | mov [hd1_status],0 |
911 | mov eax,ERROR_FILE_NOT_FOUND |
||
912 | ret |
||
913 | |||
914 | exit_writing_disk_full_clear: |
||
74 | mario79 | 915 | cmp [hd_error],0 |
916 | jne exit_write_access_1 |
||
1 | ha | 917 | mov eax,[sector_tmp] |
918 | mov ebx,buffer |
||
919 | call hd_read ; read directory sector |
||
74 | mario79 | 920 | cmp [hd_error],0 |
921 | jne exit_write_access_1 |
||
922 | |||
1 | ha | 923 | mov edx,[entry_pos] |
924 | mov byte [edx],0xe5 ; mark as deleted |
||
925 | call hd_write |
||
74 | mario79 | 926 | cmp [hd_error],0 |
927 | jne exit_write_access_1 |
||
928 | |||
1 | ha | 929 | mov eax,[edx+20-2] ; FAT entry |
930 | mov ax,[edx+26] |
||
931 | and eax,[fatMASK] |
||
932 | call clear_cluster_chain |
||
933 | |||
934 | exit_writing_disk_full: |
||
74 | mario79 | 935 | cmp [hd_error],0 |
936 | jne exit_write_access_1 |
||
1 | ha | 937 | popad |
938 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 939 | cmp [hd_error],0 |
940 | jne exit_write_access_2 |
||
1 | ha | 941 | mov [hd1_status],0 |
942 | mov eax,ERROR_DISK_FULL |
||
943 | ret |
||
944 | |||
945 | exit_write_access: |
||
946 | popad |
||
947 | call update_disk ; write all of cache and fat to hd |
||
948 | mov [hd1_status],0 |
||
949 | mov eax,ERROR_ACCESS_DENIED |
||
950 | ret |
||
951 | |||
74 | mario79 | 952 | exit_write_access_1: |
953 | popad |
||
954 | exit_write_access_2: |
||
955 | mov [hd1_status],0 |
||
956 | mov eax,ERROR_ACCESS_DENIED |
||
957 | ret |
||
958 | |||
1 | ha | 959 | found_directory_for_writing: |
960 | call analyze_directory_to_write |
||
961 | jc exit_writing_disk_full |
||
962 | |||
963 | mov [sector_tmp],eax |
||
964 | mov [entry_pos],ebx |
||
965 | push eax ; save directory sector |
||
966 | mov eax,2 |
||
967 | call get_free_FAT |
||
968 | mov [cluster],eax ; first free cluster |
||
969 | pop eax |
||
970 | jc exit_writing_disk_full |
||
971 | |||
972 | mov esi,PUSHAD_EAX ; file name |
||
973 | mov edi,ebx ; pointer in buffer |
||
974 | mov ecx,11 |
||
975 | cld |
||
976 | rep movsb |
||
977 | |||
978 | mov esi,PUSHAD_EBX ; file size (bytes left) |
||
979 | mov [ebx+28],esi ; file size |
||
980 | mov ecx,[cluster] |
||
981 | mov [ebx+26],cx ; 16 bits low of cluster |
||
982 | shr ecx,16 |
||
983 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
984 | mov byte [ebx+11],0x20 ; attribute = archive |
||
985 | |||
986 | call set_current_time_for_entry |
||
987 | |||
988 | mov ebx,buffer ; save the directory name,length,cluster |
||
989 | call hd_write |
||
74 | mario79 | 990 | cmp [hd_error],0 |
991 | jne exit_write_access_1 |
||
1 | ha | 992 | |
993 | imul edi,[SECTORS_PER_CLUSTER],512 ; edi = cluster size in bytes |
||
994 | xor ecx,ecx ; cluster count |
||
995 | mov ebx,PUSHAD_ECX ; ebx = buffer |
||
996 | |||
997 | hd_new_block_write: |
||
998 | |||
999 | mov eax,[cluster] ; eax = block |
||
1000 | call set_data_cluster |
||
74 | mario79 | 1001 | cmp [hd_error],0 |
1002 | jne exit_write_access_1 |
||
1 | ha | 1003 | |
1004 | sub esi,edi ; sub wrote bytes |
||
1005 | jbe file_saved_OK ; end if all done |
||
1006 | add ebx,edi ; update buffer position |
||
1007 | |||
1008 | inc eax |
||
1009 | call get_free_FAT ; next free in FAT |
||
1010 | jc exit_writing_disk_full_clear |
||
1011 | |||
1012 | mov edx,eax |
||
1013 | xchg eax,[cluster] ; get old cluster and save new cluster |
||
1014 | call set_FAT ; add it in cluster chain |
||
74 | mario79 | 1015 | cmp [hd_error],0 |
1016 | jne exit_write_access_1 |
||
1017 | |||
1 | ha | 1018 | dec ecx ; update cluster count |
1019 | jmp hd_new_block_write |
||
1020 | |||
1021 | file_saved_OK: |
||
1022 | |||
1023 | mov edx,[fatEND] ; new end for cluster chain |
||
1024 | call set_FAT |
||
74 | mario79 | 1025 | cmp [hd_error],0 |
1026 | jne exit_write_access_1 |
||
1027 | |||
1 | ha | 1028 | dec ecx ; update cluster count |
1029 | |||
1030 | call add_disk_free_space ; remove clusters from free disk space |
||
74 | mario79 | 1031 | cmp [hd_error],0 |
1032 | jne exit_write_access_1 |
||
1 | ha | 1033 | |
1034 | popad |
||
1035 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1036 | cmp [hd_error],0 |
1037 | jne exit_write_access_2 |
||
1 | ha | 1038 | mov [hd1_status],0 |
1039 | xor eax,eax |
||
1040 | ret |
||
1041 | |||
1042 | |||
1043 | file_read: |
||
1044 | ;-------------------------------------------------------------------------- |
||
1045 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
1046 | ; |
||
1047 | ; EAX EDI system call to write / |
||
1048 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1049 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1050 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
1051 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1052 | ; EDI ESI vt first 512 block to read |
||
1053 | ; EDI if 0 - read root |
||
1054 | ; |
||
1055 | ; output : eax = 0 - ok |
||
1056 | ; 3 - unknown FS |
||
1057 | ; 5 - file not found |
||
1058 | ; 6 - end of file |
||
1059 | ; 9 - fat table corrupted |
||
74 | mario79 | 1060 | ; 10 - access denied |
1 | ha | 1061 | ; ebx = size of file/directory |
1062 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 1063 | cmp [fs_type], 16 |
1064 | jz fat_ok_for_reading |
||
1065 | cmp [fs_type], 32 |
||
1066 | jz fat_ok_for_reading |
||
1 | ha | 1067 | xor ebx,ebx |
1068 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 1069 | mov [hd1_status], ebx |
1 | ha | 1070 | ret |
1071 | |||
1072 | fat_ok_for_reading: |
||
1073 | ; call reserve_hd1 |
||
1074 | |||
1075 | pushad |
||
1076 | |||
1077 | mov ebx,edx |
||
1078 | call get_cluster_of_a_path |
||
1079 | jc file_to_read_not_found |
||
1080 | |||
1081 | test edi,edi ; read rootdir |
||
1082 | jne no_read_root |
||
1083 | |||
1084 | xor eax,eax |
||
1085 | call get_dir_size ; return rootdir size |
||
74 | mario79 | 1086 | cmp [hd_error],0 |
1087 | jne file_access_denied |
||
1088 | |||
1 | ha | 1089 | mov [file_size],eax |
1090 | mov eax,[ROOT_CLUSTER] |
||
1091 | jmp file_read_start |
||
1092 | |||
1093 | no_read_root: |
||
1094 | mov ebx,PUSHAD_EAX ; file name |
||
1095 | call analyze_directory |
||
1096 | jc file_to_read_not_found |
||
1097 | |||
1098 | mov eax,[ebx+28] ; file size |
||
1099 | test byte [ebx+11],0x10 ; is it directory? |
||
1100 | jz read_set_size ; no |
||
1101 | |||
1102 | mov eax,[ebx+20-2] ; FAT entry |
||
1103 | mov ax,[ebx+26] |
||
1104 | and eax,[fatMASK] |
||
1105 | call get_dir_size |
||
74 | mario79 | 1106 | cmp [hd_error],0 |
1107 | jne file_access_denied |
||
1 | ha | 1108 | |
1109 | read_set_size: |
||
1110 | mov [file_size],eax |
||
1111 | |||
1112 | mov eax,[ebx+20-2] ; FAT entry |
||
1113 | mov ax,[ebx+26] |
||
1114 | and eax,[fatMASK] |
||
1115 | |||
1116 | file_read_start: |
||
1117 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
1118 | mov edx,PUSHAD_EBX ; file blocks to read |
||
1119 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
1120 | |||
1121 | file_read_new_cluster: |
||
1122 | call get_data_cluster |
||
1123 | jc file_read_eof ; end of file or cluster out of range |
||
1124 | |||
1125 | test edx,edx ; is all read? |
||
1126 | je file_read_OK ; yes |
||
1127 | |||
1128 | call get_FAT ; get next cluster |
||
74 | mario79 | 1129 | cmp [hd_error],0 |
1130 | jne file_access_denied |
||
1131 | |||
1 | ha | 1132 | cmp eax,[fatRESERVED] ; end of file |
1133 | jnb file_read_eof |
||
1134 | cmp eax,2 ; incorrect fat chain |
||
1135 | jnb file_read_new_cluster |
||
1136 | |||
1137 | popad |
||
1138 | mov [hd1_status],0 |
||
1139 | mov ebx,[file_size] |
||
1140 | mov eax,ERROR_FAT_TABLE |
||
1141 | ret |
||
1142 | |||
1143 | file_read_eof: |
||
74 | mario79 | 1144 | cmp [hd_error],0 |
1145 | jne file_access_denied |
||
1 | ha | 1146 | popad |
1147 | mov [hd1_status],0 |
||
1148 | mov ebx,[file_size] |
||
1149 | mov eax,ERROR_END_OF_FILE |
||
1150 | ret |
||
1151 | |||
1152 | file_read_OK: |
||
1153 | popad |
||
1154 | mov [hd1_status],0 |
||
1155 | mov ebx,[file_size] |
||
1156 | xor eax,eax |
||
1157 | ret |
||
1158 | |||
1159 | file_to_read_not_found: |
||
74 | mario79 | 1160 | cmp [hd_error],0 |
1161 | jne file_access_denied |
||
1 | ha | 1162 | popad |
1163 | mov [hd1_status],0 |
||
1164 | xor ebx,ebx |
||
1165 | mov eax,ERROR_FILE_NOT_FOUND |
||
1166 | ret |
||
1167 | |||
74 | mario79 | 1168 | file_access_denied: |
1169 | popad |
||
1170 | mov [hd1_status],0 |
||
1171 | xor ebx,ebx |
||
1172 | mov eax,ERROR_ACCESS_DENIED |
||
1173 | ret |
||
1 | ha | 1174 | |
1175 | get_dir_size: |
||
1176 | ;----------------------------------------------------- |
||
1177 | ; input : eax = first cluster (0=rootdir) |
||
1178 | ; output : eax = directory size in bytes |
||
1179 | ;----------------------------------------------------- |
||
1180 | push edx |
||
1181 | xor edx,edx ; count of directory clusters |
||
1182 | test eax,eax |
||
1183 | jnz dir_size_next |
||
1184 | |||
1185 | mov eax,[ROOT_SECTORS] |
||
1186 | shl eax,9 ; fat16 rootdir size in bytes |
||
256 | diamond | 1187 | cmp [fs_type],16 |
1 | ha | 1188 | je dir_size_ret |
1189 | mov eax,[ROOT_CLUSTER] |
||
1190 | |||
1191 | dir_size_next: |
||
1192 | cmp eax,2 ; incorrect fat chain |
||
1193 | jb dir_size_end |
||
1194 | cmp eax,[fatRESERVED] ; end of directory |
||
1195 | ja dir_size_end |
||
1196 | call get_FAT ; get next cluster |
||
74 | mario79 | 1197 | cmp [hd_error],0 |
1198 | jne dir_size_ret |
||
1199 | |||
1 | ha | 1200 | inc edx |
1201 | jmp dir_size_next |
||
1202 | |||
1203 | dir_size_end: |
||
1204 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1205 | imul eax,edx |
||
1206 | |||
1207 | dir_size_ret: |
||
1208 | pop edx |
||
1209 | ret |
||
1210 | |||
1211 | |||
1212 | file_delete: |
||
1213 | ;----------------------------------------------------- |
||
1214 | ; input : eax = file/directory name |
||
1215 | ; edx = path |
||
1216 | ; edi = 1 - allow directory remove else don't remove directory |
||
1217 | ; output : eax = 0 - ok |
||
1218 | ; 3 - unknown FS |
||
1219 | ; 5 - file not found |
||
1220 | ; 10 - access denied |
||
1221 | ;----------------------------------------------------- |
||
256 | diamond | 1222 | cmp [fs_type], 16 |
1223 | jz file_del_fat_ok |
||
1224 | cmp [fs_type], 32 |
||
1225 | jz file_del_fat_ok |
||
1226 | push ERROR_UNKNOWN_FS |
||
1227 | pop eax |
||
1228 | ret |
||
1 | ha | 1229 | |
1230 | file_del_fat_ok: |
||
1231 | pushad |
||
1232 | |||
1233 | mov ebx,edx |
||
1234 | call get_cluster_of_a_path |
||
1235 | jc file_to_delete_not_found |
||
1236 | |||
1237 | mov ebx,PUSHAD_EAX ; file/directory name |
||
1238 | call analyze_directory |
||
1239 | jc file_to_delete_not_found |
||
1240 | |||
1241 | test byte [ebx+11],0x10 ; is it directory? |
||
335 | diamond | 1242 | jnz delete_no_access |
1 | ha | 1243 | |
1244 | delete_notdir: |
||
1245 | call delete_entry_name |
||
74 | mario79 | 1246 | cmp [hd_error],0 |
1247 | jne delete_no_access |
||
1248 | |||
1 | ha | 1249 | mov eax,ecx ; first cluster of file |
1250 | call clear_cluster_chain |
||
74 | mario79 | 1251 | cmp [hd_error],0 |
1252 | jne delete_no_access |
||
1253 | |||
1 | ha | 1254 | popad |
1255 | xor eax,eax |
||
1256 | ret |
||
1257 | |||
74 | mario79 | 1258 | delete_no_access_1: |
1259 | add esp,4 |
||
1 | ha | 1260 | delete_no_access: |
1261 | popad |
||
1262 | mov eax,ERROR_ACCESS_DENIED |
||
1263 | ret |
||
1264 | |||
1265 | file_to_delete_not_found: |
||
74 | mario79 | 1266 | cmp [hd_error],0 |
1267 | jne delete_no_access |
||
1 | ha | 1268 | popad |
1269 | mov eax,ERROR_FILE_NOT_FOUND |
||
1270 | ret |
||
1271 | |||
1272 | |||
1273 | clear_cluster_chain: |
||
1274 | ;----------------------------------------------------- |
||
1275 | ; input : eax = first cluster |
||
1276 | ;----------------------------------------------------- |
||
1277 | push eax ecx edx |
||
1278 | xor ecx,ecx ; cluster count |
||
1279 | |||
1280 | clean_new_chain: |
||
1281 | cmp eax,[LAST_CLUSTER] ; end of file |
||
1282 | ja delete_OK |
||
1283 | cmp eax,2 ; unfinished fat chain or zero length file |
||
1284 | jb delete_OK |
||
1285 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1286 | jz delete_OK |
||
1287 | |||
1288 | xor edx,edx |
||
1289 | call set_FAT ; clear fat entry |
||
74 | mario79 | 1290 | cmp [hd_error],0 |
1291 | jne access_denied_01 |
||
1292 | |||
1 | ha | 1293 | inc ecx ; update cluster count |
1294 | mov eax,edx ; old cluster |
||
1295 | jmp clean_new_chain |
||
1296 | |||
1297 | delete_OK: |
||
1298 | call add_disk_free_space ; add clusters to free disk space |
||
74 | mario79 | 1299 | access_denied_01: |
1 | ha | 1300 | pop edx ecx eax |
1301 | ret |
||
1302 | |||
1303 | |||
1304 | delete_entry_name: |
||
1305 | ;----------------------------------------------------- |
||
1306 | ; input : eax = directory sector |
||
1307 | ; ebx = directory pointer in buffer |
||
1308 | ; longname_sec = 2 previous directory sectors |
||
1309 | ; output : ecx = first cluster |
||
1310 | ; change : eax,ebx,edx |
||
1311 | ;----------------------------------------------------- |
||
1312 | mov byte [ebx],0xe5 |
||
1313 | mov ecx,[ebx+20-2] ; first cluster of file |
||
1314 | mov cx,[ebx+26] ; 0 length files start cluster = 0 |
||
1315 | and ecx,[fatMASK] |
||
1316 | |||
1317 | delete_empty: |
||
1318 | sub ebx,32 |
||
1319 | cmp ebx,buffer |
||
1320 | jnb delete_test_long |
||
1321 | |||
1322 | mov ebx,buffer |
||
1323 | call hd_write ; write directory sector back |
||
74 | mario79 | 1324 | cmp [hd_error],0 |
1325 | jne delete_name_end |
||
1326 | |||
1 | ha | 1327 | xor eax,eax |
1328 | xchg eax,[longname_sec2] |
||
1329 | xchg eax,[longname_sec1] |
||
1330 | test eax,eax ; is there previous directory sector? |
||
1331 | jz delete_name_end ; no |
||
1332 | |||
1333 | mov ebx,buffer |
||
1334 | call hd_read ; read previous sector |
||
74 | mario79 | 1335 | cmp [hd_error],0 |
379 | serge | 1336 | jne delete_name_end |
74 | mario79 | 1337 | |
1 | ha | 1338 | mov ebx,buffer+0x1e0 ; start from last entry |
1339 | |||
1340 | delete_test_long: |
||
1341 | mov dh,[ebx+11] ; file attribute |
||
1342 | and dh,0xf |
||
1343 | cmp dh,0xf |
||
1344 | jne delete_write_buffer |
||
1345 | |||
1346 | cmp byte [ebx],0x40 ; end of long dir entry? |
||
1347 | mov byte [ebx],0xe5 |
||
1348 | jb delete_empty |
||
1349 | |||
1350 | delete_write_buffer: |
||
1351 | mov ebx,buffer |
||
1352 | call hd_write ; write directory sector back |
||
1353 | |||
1354 | delete_name_end: |
||
1355 | ret |
||
1356 | |||
1357 | |||
1358 | get_hd_info: |
||
1359 | ;----------------------------------------------------------- |
||
1360 | ; output : eax = 0 - ok |
||
1361 | ; 3 - unknown FS |
||
74 | mario79 | 1362 | ; 10 - access denied |
1 | ha | 1363 | ; edx = cluster size in bytes |
1364 | ; ebx = total clusters on disk |
||
1365 | ; ecx = free clusters on disk |
||
1366 | ;----------------------------------------------------------- |
||
256 | diamond | 1367 | cmp [fs_type], 16 |
1368 | jz info_fat_ok |
||
1369 | cmp [fs_type], 32 |
||
1370 | jz info_fat_ok |
||
1 | ha | 1371 | xor edx,edx |
1372 | xor ebx,ebx |
||
1373 | xor ecx,ecx |
||
1374 | mov eax,ERROR_UNKNOWN_FS |
||
1375 | ret |
||
1376 | |||
1377 | info_fat_ok: |
||
1378 | ; call reserve_hd1 |
||
1379 | |||
1380 | xor ecx,ecx ; count of free clusters |
||
1381 | mov eax,2 |
||
1382 | mov ebx,[LAST_CLUSTER] |
||
1383 | |||
1384 | info_cluster: |
||
1385 | push eax |
||
1386 | call get_FAT ; get cluster info |
||
74 | mario79 | 1387 | cmp [hd_error],0 |
1388 | jne info_access_denied |
||
1389 | |||
1 | ha | 1390 | test eax,eax ; is it free? |
1391 | jnz info_used ; no |
||
1392 | inc ecx |
||
1393 | |||
1394 | info_used: |
||
1395 | pop eax |
||
1396 | inc eax |
||
1397 | cmp eax,ebx ; is above last cluster? |
||
1398 | jbe info_cluster ; no. test next cluster |
||
1399 | |||
1400 | dec ebx ; cluster count |
||
1401 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1402 | mov [hd1_status],0 |
||
1403 | xor eax,eax |
||
1404 | ret |
||
1405 | |||
74 | mario79 | 1406 | info_access_denied: |
379 | serge | 1407 | add esp,4 |
74 | mario79 | 1408 | xor edx,edx |
1409 | xor ebx,ebx |
||
1410 | xor ecx,ecx |
||
1411 | mov eax,ERROR_ACCESS_DENIED |
||
1412 | ret |
||
1 | ha | 1413 | |
1414 | update_disk: |
||
1415 | ;----------------------------------------------------------- |
||
1416 | ; write changed fat and cache to disk |
||
1417 | ;----------------------------------------------------------- |
||
1418 | cmp [fat_change],0 ; is fat changed? |
||
1419 | je upd_no_change |
||
1420 | |||
1421 | call write_fat_sector |
||
74 | mario79 | 1422 | cmp [hd_error],0 |
1423 | jne update_disk_acces_denied |
||
1 | ha | 1424 | |
1425 | upd_no_change: |
||
1426 | |||
1427 | call write_cache |
||
74 | mario79 | 1428 | update_disk_acces_denied: |
1 | ha | 1429 | ret |
1430 | |||
1431 | read_hd_file: |
||
1432 | ;----------------------------------------------------------------- |
||
1433 | ; |
||
1434 | ; Converting old reading function for hd-application start. |
||
1435 | ; |
||
1436 | ; IN: |
||
1437 | ; |
||
1438 | ; eax - pointer to file (0 = read only first sector of drive: eg 'label') |
||
1439 | ; ebx - file lenght |
||
1440 | ; ecx - start 512 byte block number |
||
1441 | ; edx - number of blocks to read |
||
1442 | ; esi - pointer to return/work area (atleast 20 000 bytes) |
||
1443 | ; |
||
1444 | ; For new read function |
||
1445 | ; |
||
1446 | ; EAX (PAR0) pointer to file-name |
||
1447 | ; ECX (PAR1) pointer to buffer |
||
1448 | ; EBX (PAR2) vt file blocks to read |
||
1449 | ; EDX (PAR3) pointer to path |
||
1450 | ; ESI vt first 512 block to read |
||
1451 | ; EDI if 0 - return root |
||
1452 | ;-------------------------------------------------------------------------- |
||
1453 | |||
1454 | push ecx esi edi |
||
1455 | mov esi,eax |
||
1456 | mov edi,startpath |
||
1457 | mov ecx,250 |
||
1458 | cld |
||
1459 | rep movsb |
||
1460 | pop edi esi ecx |
||
1461 | |||
1462 | mov eax,startpath |
||
1463 | mov [eax+ebx-12],byte 0 |
||
1464 | |||
1465 | push eax ebx ecx edx esi |
||
1466 | |||
1467 | pop ecx ; pointer to buffer |
||
1468 | add ecx,1024 |
||
1469 | pop ebx ; number of blocks to read |
||
1470 | pop esi ; first block to read |
||
1471 | dec esi |
||
1472 | pop eax ; file length |
||
1473 | pop edx ; pointer to path |
||
1474 | |||
1475 | mov edi,12 |
||
1476 | lea eax,[eax+edx-12+1] |
||
1477 | call file_read |
||
1478 | |||
1479 | ret |
||
1480 | |||
71 | diamond | 1481 | ; \begin{diamond} |
1482 | hd_find_lfn: |
||
1483 | ; in: esi->name |
||
1484 | ; out: CF=1 - file not found |
||
86 | diamond | 1485 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 1486 | ; destroys eax |
1487 | push esi edi |
||
1488 | push 0 |
||
1489 | push 0 |
||
1490 | push fat16_root_first |
||
1491 | push fat16_root_next |
||
1492 | mov eax, [ROOT_CLUSTER] |
||
256 | diamond | 1493 | cmp [fs_type], 32 |
83 | diamond | 1494 | jz .fat32 |
1495 | .loop: |
||
1496 | call fat_find_lfn |
||
1497 | jc .notfound |
||
1498 | cmp byte [esi], 0 |
||
1499 | jz .found |
||
1500 | test byte [edi+11], 10h |
||
1501 | jz .notfound |
||
1502 | and dword [esp+12], 0 |
||
88 | diamond | 1503 | mov eax, [edi+20-2] |
1504 | mov ax, [edi+26] ; cluster |
||
83 | diamond | 1505 | .fat32: |
1506 | mov [esp+8], eax |
||
1507 | mov dword [esp+4], fat_notroot_first |
||
1508 | mov dword [esp], fat_notroot_next |
||
1509 | jmp .loop |
||
71 | diamond | 1510 | .notfound: |
83 | diamond | 1511 | add esp, 16 |
1512 | pop edi esi |
||
1513 | stc |
||
1514 | ret |
||
71 | diamond | 1515 | .found: |
86 | diamond | 1516 | lea eax, [esp+8] |
1517 | cmp dword [eax], 0 |
||
1518 | jz .root |
||
1519 | call fat_get_sector |
||
1520 | jmp .cmn |
||
1521 | .root: |
||
1522 | mov eax, [eax+4] |
||
1523 | add eax, [ROOT_START] |
||
1524 | .cmn: |
||
83 | diamond | 1525 | add esp, 20 ; CF=0 |
1526 | pop esi |
||
1527 | ret |
||
74 | mario79 | 1528 | |
71 | diamond | 1529 | ;---------------------------------------------------------------- |
1530 | ; |
||
1531 | ; fs_HdRead - LFN variant for reading hard disk |
||
1532 | ; |
||
1533 | ; esi points to filename |
||
1534 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1535 | ; may be ebx=0 - start from first byte |
||
1536 | ; ecx number of bytes to read, 0+ |
||
1537 | ; edx mem location to return data |
||
1538 | ; |
||
77 | diamond | 1539 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 1540 | ; eax = 0 ok read or other = errormsg |
1541 | ; |
||
1542 | ;-------------------------------------------------------------- |
||
1543 | fs_HdRead: |
||
256 | diamond | 1544 | cmp [fs_type], 16 |
1545 | jz @f |
||
1546 | cmp [fs_type], 32 |
||
1547 | jz @f |
||
1548 | cmp [fs_type], 1 |
||
1549 | jz ntfs_HdRead |
||
1550 | or ebx, -1 |
||
1551 | mov eax, ERROR_UNKNOWN_FS |
||
1552 | ret |
||
71 | diamond | 1553 | @@: |
74 | mario79 | 1554 | push edi |
1555 | cmp byte [esi], 0 |
||
1556 | jnz @f |
||
71 | diamond | 1557 | .noaccess: |
74 | mario79 | 1558 | pop edi |
1559 | .noaccess_2: |
||
1560 | or ebx, -1 |
||
1561 | mov eax, ERROR_ACCESS_DENIED |
||
1562 | ret |
||
379 | serge | 1563 | |
74 | mario79 | 1564 | .noaccess_3: |
1565 | add esp,4 |
||
1566 | .noaccess_1: |
||
1567 | add esp,4 |
||
1568 | .noaccess_4: |
||
1569 | add esp,4*5 |
||
1570 | jmp .noaccess_2 |
||
1571 | |||
71 | diamond | 1572 | @@: |
74 | mario79 | 1573 | call hd_find_lfn |
1574 | jnc .found |
||
1575 | pop edi |
||
1576 | cmp [hd_error],0 |
||
1577 | jne .noaccess_2 |
||
1578 | or ebx, -1 |
||
1579 | mov eax, ERROR_FILE_NOT_FOUND |
||
1580 | ret |
||
1581 | |||
71 | diamond | 1582 | .found: |
74 | mario79 | 1583 | test byte [edi+11], 0x10 ; do not allow read directories |
1584 | jnz .noaccess |
||
1585 | test ebx, ebx |
||
1586 | jz .l1 |
||
1587 | cmp dword [ebx+4], 0 |
||
1588 | jz @f |
||
77 | diamond | 1589 | xor ebx, ebx |
71 | diamond | 1590 | .reteof: |
74 | mario79 | 1591 | mov eax, 6 |
1592 | pop edi |
||
1593 | ret |
||
71 | diamond | 1594 | @@: |
74 | mario79 | 1595 | mov ebx, [ebx] |
71 | diamond | 1596 | .l1: |
77 | diamond | 1597 | push ecx edx |
1598 | push 0 |
||
1599 | mov eax, [edi+28] |
||
1600 | sub eax, ebx |
||
1601 | jb .eof |
||
1602 | cmp eax, ecx |
||
1603 | jae @f |
||
1604 | mov ecx, eax |
||
1605 | mov byte [esp], 6 |
||
1606 | @@: |
||
74 | mario79 | 1607 | mov eax, [edi+20-2] |
1608 | mov ax, [edi+26] |
||
71 | diamond | 1609 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1610 | .new_cluster: |
||
74 | mario79 | 1611 | jecxz .new_sector |
1612 | test eax, eax |
||
1613 | jz .eof |
||
1614 | cmp eax, [fatRESERVED] |
||
1615 | jae .eof |
||
1616 | mov [cluster_tmp], eax |
||
1617 | dec eax |
||
1618 | dec eax |
||
1619 | mov edi, [SECTORS_PER_CLUSTER] |
||
1620 | imul eax, edi |
||
1621 | add eax, [DATA_START] |
||
71 | diamond | 1622 | .new_sector: |
74 | mario79 | 1623 | test ecx, ecx |
1624 | jz .done |
||
1625 | sub ebx, 512 |
||
1626 | jae .skip |
||
1627 | add ebx, 512 |
||
1628 | jnz .force_buf |
||
1629 | cmp ecx, 512 |
||
1630 | jb .force_buf |
||
71 | diamond | 1631 | ; we may read directly to given buffer |
74 | mario79 | 1632 | push ebx |
1633 | mov ebx, edx |
||
1634 | call hd_read |
||
1635 | cmp [hd_error],0 |
||
379 | serge | 1636 | jne .noaccess_1 |
74 | mario79 | 1637 | pop ebx |
1638 | add edx, 512 |
||
1639 | sub ecx, 512 |
||
1640 | jmp .skip |
||
71 | diamond | 1641 | .force_buf: |
1642 | ; we must read sector to temporary buffer and then copy it to destination |
||
74 | mario79 | 1643 | push eax ebx |
1644 | mov ebx, buffer |
||
1645 | call hd_read |
||
1646 | cmp [hd_error],0 |
||
1647 | jne .noaccess_3 |
||
1648 | |||
1649 | mov eax, ebx |
||
1650 | pop ebx |
||
1651 | add eax, ebx |
||
1652 | push ecx |
||
1653 | add ecx, ebx |
||
1654 | cmp ecx, 512 |
||
1655 | jbe @f |
||
1656 | mov ecx, 512 |
||
71 | diamond | 1657 | @@: |
74 | mario79 | 1658 | sub ecx, ebx |
1659 | mov ebx, edx |
||
1660 | call memmove |
||
1661 | add edx, ecx |
||
1662 | sub [esp], ecx |
||
1663 | pop ecx |
||
1664 | pop eax |
||
1665 | xor ebx, ebx |
||
71 | diamond | 1666 | .skip: |
74 | mario79 | 1667 | inc eax |
1668 | dec edi |
||
1669 | jnz .new_sector |
||
1670 | mov eax, [cluster_tmp] |
||
1671 | call get_FAT |
||
1672 | cmp [hd_error],0 |
||
1673 | jne .noaccess_4 |
||
1674 | |||
1675 | jmp .new_cluster |
||
71 | diamond | 1676 | .done: |
77 | diamond | 1677 | mov ebx, edx |
1678 | pop eax edx ecx edi |
||
1679 | sub ebx, edx |
||
1680 | ret |
||
71 | diamond | 1681 | .eof: |
77 | diamond | 1682 | mov ebx, edx |
1683 | pop eax edx ecx |
||
1684 | sub ebx, edx |
||
1685 | jmp .reteof |
||
75 | diamond | 1686 | |
1687 | ;---------------------------------------------------------------- |
||
1688 | ; |
||
1689 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
1690 | ; |
||
1691 | ; esi points to filename |
||
78 | diamond | 1692 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
1693 | ; & flags (bitfields) |
||
1694 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 1695 | ; ecx number of blocks to read, 0+ |
1696 | ; edx mem location to return data |
||
1697 | ; |
||
77 | diamond | 1698 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 1699 | ; eax = 0 ok read or other = errormsg |
1700 | ; |
||
1701 | ;-------------------------------------------------------------- |
||
1702 | fs_HdReadFolder: |
||
256 | diamond | 1703 | cmp [fs_type], 1 |
1704 | jz ntfs_HdReadFolder |
||
1705 | cmp [fs_type], 16 |
||
1706 | jz @f |
||
1707 | cmp [fs_type], 32 |
||
1708 | jz @f |
||
1709 | push ERROR_UNSUPPORTED_FS |
||
1710 | pop eax |
||
1711 | or ebx, -1 |
||
1712 | ret |
||
1713 | @@: |
||
75 | diamond | 1714 | mov eax, [ROOT_CLUSTER] |
1715 | push edi |
||
1716 | cmp byte [esi], 0 |
||
1717 | jz .doit |
||
1718 | call hd_find_lfn |
||
1719 | jnc .found |
||
1720 | pop edi |
||
1721 | or ebx, -1 |
||
1722 | mov eax, ERROR_FILE_NOT_FOUND |
||
1723 | ret |
||
1724 | .found: |
||
1725 | test byte [edi+11], 0x10 ; do not allow read files |
||
1726 | jnz .found_dir |
||
1727 | pop edi |
||
1728 | or ebx, -1 |
||
1729 | mov eax, ERROR_ACCESS_DENIED |
||
1730 | ret |
||
1731 | .found_dir: |
||
1732 | mov eax, [edi+20-2] |
||
1733 | mov ax, [edi+26] ; eax=cluster |
||
1734 | .doit: |
||
1735 | push esi ecx |
||
1736 | push ebp |
||
1737 | sub esp, 262*2 ; reserve space for LFN |
||
1738 | mov ebp, esp |
||
78 | diamond | 1739 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1740 | mov ebx, [ebx] |
||
75 | diamond | 1741 | ; init header |
1742 | push eax ecx |
||
1743 | mov edi, edx |
||
1744 | mov ecx, 32/4 |
||
1745 | xor eax, eax |
||
1746 | rep stosd |
||
1747 | pop ecx eax |
||
1748 | mov byte [edx], 1 ; version |
||
1749 | mov esi, edi ; esi points to BDFE |
||
1750 | .new_cluster: |
||
1751 | mov [cluster_tmp], eax |
||
1752 | test eax, eax |
||
1753 | jnz @f |
||
256 | diamond | 1754 | cmp [fs_type], 32 |
75 | diamond | 1755 | jz .notfound |
1756 | mov eax, [ROOT_START] |
||
1757 | push [ROOT_SECTORS] |
||
1758 | push ebx |
||
1759 | jmp .new_sector |
||
1760 | @@: |
||
1761 | dec eax |
||
1762 | dec eax |
||
1763 | imul eax, [SECTORS_PER_CLUSTER] |
||
1764 | push [SECTORS_PER_CLUSTER] |
||
1765 | add eax, [DATA_START] |
||
1766 | push ebx |
||
1767 | .new_sector: |
||
1768 | mov ebx, buffer |
||
1769 | mov edi, ebx |
||
1770 | call hd_read |
||
1771 | cmp [hd_error], 0 |
||
1772 | jnz .notfound2 |
||
1773 | add ebx, 512 |
||
1774 | push eax |
||
1775 | .l1: |
||
1776 | call fat_get_name |
||
1777 | jc .l2 |
||
1778 | cmp byte [edi+11], 0xF |
||
1779 | jnz .do_bdfe |
||
1780 | add edi, 0x20 |
||
1781 | cmp edi, ebx |
||
1782 | jb .do_bdfe |
||
1783 | pop eax |
||
1784 | inc eax |
||
1785 | dec dword [esp+4] |
||
1786 | jnz @f |
||
1787 | mov eax, [cluster_tmp] |
||
1788 | test eax, eax |
||
1789 | jz .done |
||
1790 | call get_FAT |
||
1791 | cmp [hd_error], 0 |
||
1792 | jnz .notfound2 |
||
1793 | cmp eax, 2 |
||
1794 | jb .done |
||
1795 | cmp eax, [fatRESERVED] |
||
1796 | jae .done |
||
1797 | push eax |
||
1798 | mov eax, [SECTORS_PER_CLUSTER] |
||
1799 | mov [esp+8], eax |
||
1800 | pop eax |
||
1801 | mov [cluster_tmp], eax |
||
1802 | dec eax |
||
1803 | dec eax |
||
1804 | imul eax, [SECTORS_PER_CLUSTER] |
||
1805 | add eax, [DATA_START] |
||
1806 | @@: |
||
1807 | mov ebx, buffer |
||
1808 | mov edi, ebx |
||
1809 | call hd_read |
||
1810 | cmp [hd_error], 0 |
||
1811 | jnz .notfound2 |
||
1812 | add ebx, 512 |
||
1813 | push eax |
||
1814 | .do_bdfe: |
||
1815 | inc dword [edx+8] ; new file found |
||
1816 | dec dword [esp+4] |
||
1817 | jns .l2 |
||
1818 | dec ecx |
||
1819 | js .l2 |
||
1820 | inc dword [edx+4] ; new file block copied |
||
1821 | call fat_entry_to_bdfe |
||
1822 | .l2: |
||
1823 | add edi, 0x20 |
||
1824 | cmp edi, ebx |
||
1825 | jb .l1 |
||
1826 | pop eax |
||
1827 | inc eax |
||
1828 | dec dword [esp+4] |
||
1829 | jnz .new_sector |
||
1830 | mov eax, [cluster_tmp] |
||
1831 | test eax, eax |
||
1832 | jz .done |
||
1833 | call get_FAT |
||
1834 | cmp [hd_error], 0 |
||
1835 | jnz .notfound2 |
||
1836 | cmp eax, 2 |
||
1837 | jb .done |
||
1838 | cmp eax, [fatRESERVED] |
||
1839 | jae .done |
||
1840 | push eax |
||
1841 | mov eax, [SECTORS_PER_CLUSTER] |
||
1842 | mov [esp+8], eax |
||
1843 | pop eax |
||
1844 | pop ebx |
||
1845 | add esp, 4 |
||
1846 | jmp .new_cluster |
||
1847 | .notfound2: |
||
1848 | add esp, 8 |
||
1849 | .notfound: |
||
1850 | add esp, 262*2+4 |
||
1851 | pop ebp ecx esi edi |
||
1852 | mov eax, ERROR_FILE_NOT_FOUND |
||
1853 | or ebx, -1 |
||
1854 | ret |
||
1855 | .done: |
||
1856 | add esp, 262*2+4+8 |
||
1857 | pop ebp |
||
77 | diamond | 1858 | mov ebx, [edx+4] |
75 | diamond | 1859 | xor eax, eax |
1860 | dec ecx |
||
1861 | js @f |
||
1862 | mov al, ERROR_END_OF_FILE |
||
1863 | @@: |
||
1864 | pop ecx esi edi |
||
1865 | ret |
||
1866 | |||
83 | diamond | 1867 | fat16_root_next: |
1868 | cmp edi, buffer+0x200-0x20 |
||
1869 | jae fat16_root_next_sector |
||
1870 | add edi, 0x20 |
||
1871 | ret ; CF=0 |
||
1872 | fat16_root_next_sector: |
||
1873 | ; read next sector |
||
171 | diamond | 1874 | push [longname_sec2] |
1875 | pop [longname_sec1] |
||
83 | diamond | 1876 | push ecx |
1877 | mov ecx, [eax+4] |
||
171 | diamond | 1878 | push ecx |
1879 | add ecx, [ROOT_START] |
||
1880 | mov [longname_sec2], ecx |
||
1881 | pop ecx |
||
83 | diamond | 1882 | inc ecx |
1883 | mov [eax+4], ecx |
||
1884 | cmp ecx, [ROOT_SECTORS] |
||
1885 | pop ecx |
||
1886 | jae fat16_root_first.readerr |
||
1887 | fat16_root_first: |
||
1888 | mov eax, [eax+4] |
||
1889 | add eax, [ROOT_START] |
||
1890 | push ebx |
||
1891 | mov edi, buffer |
||
1892 | mov ebx, edi |
||
1893 | call hd_read |
||
1894 | pop ebx |
||
1895 | cmp [hd_error], 0 |
||
1896 | jnz .readerr |
||
1897 | ret ; CF=0 |
||
1898 | .readerr: |
||
1899 | stc |
||
1900 | ret |
||
1901 | fat16_root_begin_write: |
||
1902 | push edi eax |
||
1903 | call fat16_root_first |
||
1904 | pop eax edi |
||
1905 | ret |
||
1906 | fat16_root_end_write: |
||
1907 | pusha |
||
1908 | mov eax, [eax+4] |
||
1909 | add eax, [ROOT_START] |
||
1910 | mov ebx, buffer |
||
1911 | call hd_write |
||
1912 | popa |
||
1913 | ret |
||
1914 | fat16_root_next_write: |
||
1915 | cmp edi, buffer+0x200 |
||
1916 | jae @f |
||
1917 | ret |
||
1918 | @@: |
||
1919 | call fat16_root_end_write |
||
1920 | jmp fat16_root_next_sector |
||
1921 | fat16_root_extend_dir: |
||
1922 | stc |
||
1923 | ret |
||
1924 | |||
1925 | fat_notroot_next: |
||
1926 | cmp edi, buffer+0x200-0x20 |
||
1927 | jae fat_notroot_next_sector |
||
1928 | add edi, 0x20 |
||
1929 | ret ; CF=0 |
||
1930 | fat_notroot_next_sector: |
||
171 | diamond | 1931 | push [longname_sec2] |
1932 | pop [longname_sec1] |
||
1933 | push eax |
||
1934 | call fat_get_sector |
||
1935 | mov [longname_sec2], eax |
||
1936 | pop eax |
||
83 | diamond | 1937 | push ecx |
1938 | mov ecx, [eax+4] |
||
1939 | inc ecx |
||
1940 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
1941 | jae fat_notroot_next_cluster |
||
1942 | mov [eax+4], ecx |
||
1943 | jmp @f |
||
1944 | fat_notroot_next_cluster: |
||
1945 | push eax |
||
1946 | mov eax, [eax] |
||
1947 | call get_FAT |
||
1948 | mov ecx, eax |
||
1949 | pop eax |
||
1950 | cmp [hd_error], 0 |
||
1951 | jnz fat_notroot_next_err |
||
1952 | cmp ecx, [fatRESERVED] |
||
1953 | jae fat_notroot_next_err |
||
1954 | mov [eax], ecx |
||
1955 | and dword [eax+4], 0 |
||
1956 | @@: |
||
1957 | pop ecx |
||
1958 | fat_notroot_first: |
||
1959 | call fat_get_sector |
||
1960 | push ebx |
||
1961 | mov edi, buffer |
||
1962 | mov ebx, edi |
||
1963 | call hd_read |
||
1964 | pop ebx |
||
1965 | cmp [hd_error], 0 |
||
1966 | jnz @f |
||
1967 | ret ; CF=0 |
||
1968 | fat_notroot_next_err: |
||
1969 | pop ecx |
||
1970 | @@: |
||
1971 | stc |
||
1972 | ret |
||
1973 | fat_notroot_begin_write: |
||
1974 | push eax edi |
||
1975 | call fat_notroot_first |
||
1976 | pop edi eax |
||
1977 | ret |
||
1978 | fat_notroot_end_write: |
||
1979 | call fat_get_sector |
||
1980 | push ebx |
||
1981 | mov ebx, buffer |
||
1982 | call hd_write |
||
1983 | pop ebx |
||
1984 | ret |
||
1985 | fat_notroot_next_write: |
||
1986 | cmp edi, buffer+0x200 |
||
1987 | jae @f |
||
1988 | ret |
||
1989 | @@: |
||
1990 | push eax |
||
1991 | call fat_notroot_end_write |
||
1992 | pop eax |
||
1993 | jmp fat_notroot_next_sector |
||
1994 | fat_notroot_extend_dir: |
||
1995 | push eax |
||
1996 | mov eax, [eax] |
||
1997 | call get_free_FAT |
||
1998 | jnc .found |
||
1999 | pop eax |
||
2000 | ret ; CF=1 |
||
2001 | .found: |
||
2002 | push edx |
||
2003 | mov edx, [fatEND] |
||
2004 | call set_FAT |
||
2005 | mov edx, eax |
||
2006 | mov eax, [esp+4] |
||
2007 | mov eax, [eax] |
||
2008 | push edx |
||
2009 | call set_FAT |
||
2010 | pop edx |
||
2011 | cmp [hd_error], 0 |
||
2012 | jz @f |
||
2013 | pop edx |
||
2014 | pop eax |
||
2015 | stc |
||
2016 | ret |
||
2017 | @@: |
||
2018 | push ecx |
||
2019 | or ecx, -1 |
||
2020 | call add_disk_free_space |
||
2021 | ; zero new cluster |
||
2022 | mov ecx, 512/4 |
||
2023 | mov edi, buffer |
||
2024 | push edi |
||
2025 | xor eax, eax |
||
2026 | rep stosd |
||
2027 | pop edi |
||
2028 | pop ecx |
||
2029 | mov eax, [esp+4] |
||
2030 | mov [eax], edx |
||
2031 | and dword [eax+4], 0 |
||
2032 | pop edx |
||
2033 | mov eax, [eax] |
||
2034 | dec eax |
||
2035 | dec eax |
||
2036 | push ebx ecx |
||
2037 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2038 | imul eax, ecx |
||
2039 | add eax, [DATA_START] |
||
2040 | mov ebx, edi |
||
2041 | @@: |
||
2042 | call hd_write |
||
2043 | inc eax |
||
2044 | loop @b |
||
2045 | pop ecx ebx eax |
||
2046 | clc |
||
2047 | ret |
||
2048 | |||
2049 | fat_get_sector: |
||
2050 | push ecx |
||
2051 | mov ecx, [eax] |
||
2052 | dec ecx |
||
2053 | dec ecx |
||
2054 | imul ecx, [SECTORS_PER_CLUSTER] |
||
2055 | add ecx, [DATA_START] |
||
2056 | add ecx, [eax+4] |
||
2057 | mov eax, ecx |
||
2058 | pop ecx |
||
2059 | ret |
||
2060 | |||
2061 | ;---------------------------------------------------------------- |
||
2062 | ; |
||
2063 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
2064 | ; |
||
2065 | ; esi points to filename |
||
2066 | ; ebx ignored (reserved) |
||
2067 | ; ecx number of bytes to write, 0+ |
||
2068 | ; edx mem location to data |
||
2069 | ; |
||
2070 | ; ret ebx = number of written bytes |
||
2071 | ; eax = 0 ok read or other = errormsg |
||
2072 | ; |
||
2073 | ;-------------------------------------------------------------- |
||
2074 | fshrad: |
||
2075 | mov eax, ERROR_ACCESS_DENIED |
||
2076 | xor ebx, ebx |
||
2077 | ret |
||
2078 | fshrfs: |
||
2079 | mov eax, ERROR_UNKNOWN_FS |
||
2080 | xor ebx, ebx |
||
2081 | ret |
||
2082 | |||
321 | diamond | 2083 | fs_HdCreateFolder: |
2084 | mov al, 1 |
||
2085 | jmp fs_HdRewrite.common |
||
2086 | |||
83 | diamond | 2087 | fs_HdRewrite: |
321 | diamond | 2088 | xor eax, eax |
2089 | .common: |
||
256 | diamond | 2090 | cmp [fs_type], 1 |
2091 | jz ntfs_HdRewrite |
||
2092 | cmp [fs_type], 16 |
||
2093 | jz @f |
||
2094 | cmp [fs_type], 32 |
||
2095 | jnz fshrfs |
||
2096 | @@: |
||
83 | diamond | 2097 | cmp byte [esi], 0 |
2098 | jz fshrad |
||
2099 | pushad |
||
2100 | xor ebp, ebp |
||
2101 | push esi |
||
2102 | @@: |
||
2103 | lodsb |
||
2104 | test al, al |
||
2105 | jz @f |
||
2106 | cmp al, '/' |
||
2107 | jnz @b |
||
2108 | lea ebp, [esi-1] |
||
2109 | jmp @b |
||
2110 | @@: |
||
2111 | pop esi |
||
2112 | test ebp, ebp |
||
2113 | jnz .noroot |
||
2114 | mov ebp, [ROOT_CLUSTER] |
||
256 | diamond | 2115 | cmp [fs_type], 32 |
83 | diamond | 2116 | jz .pushnotroot |
2117 | push fat16_root_extend_dir |
||
2118 | push fat16_root_end_write |
||
2119 | push fat16_root_next_write |
||
2120 | push fat16_root_begin_write |
||
2121 | xor ebp, ebp |
||
2122 | push ebp |
||
2123 | push ebp |
||
2124 | push fat16_root_first |
||
2125 | push fat16_root_next |
||
2126 | jmp .common1 |
||
2127 | .noroot: |
||
335 | diamond | 2128 | mov eax, ERROR_ACCESS_DENIED |
2129 | cmp byte [ebp+1], 0 |
||
2130 | jz .ret1 |
||
83 | diamond | 2131 | ; check existence |
2132 | mov byte [ebp], 0 |
||
2133 | call hd_find_lfn |
||
2134 | mov byte [ebp], '/' |
||
2135 | lea esi, [ebp+1] |
||
2136 | jnc @f |
||
2137 | mov eax, ERROR_FILE_NOT_FOUND |
||
2138 | .ret1: |
||
2139 | mov [esp+28], eax |
||
2140 | popad |
||
2141 | xor ebx, ebx |
||
2142 | ret |
||
2143 | @@: |
||
2144 | test byte [edi+11], 0x10 ; must be directory |
||
2145 | mov eax, ERROR_ACCESS_DENIED |
||
2146 | jz .ret1 |
||
2147 | mov ebp, [edi+20-2] |
||
2148 | mov bp, [edi+26] ; ebp=cluster |
||
2149 | mov eax, ERROR_FAT_TABLE |
||
2150 | cmp ebp, 2 |
||
2151 | jb .ret1 |
||
2152 | .pushnotroot: |
||
2153 | push fat_notroot_extend_dir |
||
2154 | push fat_notroot_end_write |
||
2155 | push fat_notroot_next_write |
||
2156 | push fat_notroot_begin_write |
||
2157 | push 0 |
||
2158 | push ebp |
||
2159 | push fat_notroot_first |
||
2160 | push fat_notroot_next |
||
2161 | .common1: |
||
2162 | call fat_find_lfn |
||
2163 | jc .notfound |
||
321 | diamond | 2164 | ; found |
91 | diamond | 2165 | test byte [edi+11], 10h |
321 | diamond | 2166 | jz .exists_file |
2167 | ; found directory; if we are creating directory, return OK, |
||
2168 | ; if we are creating file, say "access denied" |
||
2169 | add esp, 32 |
||
2170 | popad |
||
2171 | test al, al |
||
2172 | mov eax, ERROR_ACCESS_DENIED |
||
91 | diamond | 2173 | jz @f |
321 | diamond | 2174 | mov al, 0 |
2175 | @@: |
||
2176 | xor ebx, ebx |
||
2177 | ret |
||
2178 | .exists_file: |
||
2179 | ; found file; if we are creating directory, return "access denied", |
||
2180 | ; if we are creating file, delete existing file and continue |
||
2181 | cmp byte [esp+32+28], 0 |
||
2182 | jz @f |
||
91 | diamond | 2183 | add esp, 32 |
2184 | popad |
||
2185 | mov eax, ERROR_ACCESS_DENIED |
||
2186 | xor ebx, ebx |
||
2187 | ret |
||
2188 | @@: |
||
2189 | ; delete FAT chain |
||
83 | diamond | 2190 | push edi |
2191 | xor eax, eax |
||
2192 | mov dword [edi+28], eax ; zero size |
||
2193 | xor ecx, ecx |
||
2194 | mov eax, [edi+20-2] |
||
2195 | mov ax, [edi+26] |
||
2196 | mov word [edi+20], cx |
||
2197 | mov word [edi+26], cx |
||
2198 | test eax, eax |
||
2199 | jz .done1 |
||
2200 | @@: |
||
2201 | cmp eax, [fatRESERVED] |
||
2202 | jae .done1 |
||
2203 | push edx |
||
2204 | xor edx, edx |
||
2205 | call set_FAT |
||
2206 | mov eax, edx |
||
2207 | pop edx |
||
2208 | inc ecx |
||
2209 | jmp @b |
||
2210 | .done1: |
||
2211 | pop edi |
||
2212 | call get_time_for_file |
||
2213 | mov [edi+22], ax |
||
2214 | call get_date_for_file |
||
2215 | mov [edi+24], ax |
||
2216 | mov [edi+18], ax |
||
2217 | or byte [edi+11], 20h ; set 'archive' attribute |
||
2218 | jmp .doit |
||
2219 | .notfound: |
||
2220 | ; file is not found; generate short name |
||
2221 | call fat_name_is_legal |
||
2222 | jc @f |
||
2223 | add esp, 32 |
||
2224 | popad |
||
2225 | mov eax, ERROR_FILE_NOT_FOUND |
||
2226 | xor ebx, ebx |
||
2227 | ret |
||
2228 | @@: |
||
2229 | sub esp, 12 |
||
2230 | mov edi, esp |
||
2231 | call fat_gen_short_name |
||
2232 | .test_short_name_loop: |
||
2233 | push esi edi ecx |
||
2234 | mov esi, edi |
||
2235 | lea eax, [esp+12+12+8] |
||
2236 | mov [eax], ebp |
||
2237 | and dword [eax+4], 0 |
||
2238 | call dword [eax-4] |
||
2239 | jc .found |
||
2240 | .test_short_name_entry: |
||
2241 | cmp byte [edi+11], 0xF |
||
2242 | jz .test_short_name_cont |
||
2243 | mov ecx, 11 |
||
2244 | push esi edi |
||
2245 | repz cmpsb |
||
2246 | pop edi esi |
||
2247 | jz .short_name_found |
||
2248 | .test_short_name_cont: |
||
2249 | lea eax, [esp+12+12+8] |
||
2250 | call dword [eax-8] |
||
2251 | jnc .test_short_name_entry |
||
2252 | jmp .found |
||
2253 | .short_name_found: |
||
2254 | pop ecx edi esi |
||
2255 | call fat_next_short_name |
||
2256 | jnc .test_short_name_loop |
||
2257 | .disk_full: |
||
2258 | add esp, 12+32 |
||
2259 | popa |
||
2260 | mov eax, ERROR_DISK_FULL |
||
2261 | xor ebx, ebx |
||
2262 | ret |
||
2263 | .found: |
||
2264 | pop ecx edi esi |
||
2265 | ; now find space in directory |
||
2266 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
2267 | mov al, '~' |
||
2268 | push ecx edi |
||
2269 | mov ecx, 8 |
||
2270 | repnz scasb |
||
2271 | push 1 |
||
2272 | pop eax ; 1 entry |
||
2273 | jnz .notilde |
||
2274 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
2275 | xor eax, eax |
||
2276 | @@: |
||
2277 | cmp byte [esi], 0 |
||
2278 | jz @f |
||
2279 | inc esi |
||
2280 | inc eax |
||
2281 | jmp @b |
||
2282 | @@: |
||
2283 | sub esi, eax |
||
2284 | add eax, 12+13 |
||
2285 | mov ecx, 13 |
||
2286 | push edx |
||
2287 | cdq |
||
2288 | div ecx |
||
2289 | pop edx |
||
2290 | .notilde: |
||
2291 | push -1 |
||
2292 | push -1 |
||
2293 | push -1 |
||
2294 | ; find |
||
2295 | xor ecx, ecx |
||
2296 | push eax |
||
2297 | lea eax, [esp+16+8+12+8] |
||
2298 | mov [eax], ebp |
||
2299 | and dword [eax+4], 0 |
||
2300 | call dword [eax-4] |
||
2301 | pop eax |
||
2302 | jnc .scan_dir |
||
2303 | .fsfrfe3: |
||
2304 | add esp, 12+8+12+32 |
||
2305 | popad |
||
2306 | mov eax, 11 |
||
2307 | xor ebx, ebx |
||
2308 | ret |
||
2309 | .scan_dir: |
||
2310 | cmp byte [edi], 0 |
||
2311 | jz .free |
||
2312 | cmp byte [edi], 0xE5 |
||
2313 | jz .free |
||
2314 | xor ecx, ecx |
||
2315 | .scan_cont: |
||
2316 | push eax |
||
2317 | lea eax, [esp+16+8+12+8] |
||
2318 | call dword [eax-8] |
||
2319 | pop eax |
||
2320 | jnc .scan_dir |
||
2321 | cmp [hd_error], 0 |
||
2322 | jnz .fsfrfe3 |
||
2323 | push eax |
||
2324 | lea eax, [esp+16+8+12+8] |
||
2325 | call dword [eax+20] ; extend directory |
||
2326 | pop eax |
||
2327 | jnc .scan_dir |
||
2328 | add esp, 12+8+12+32 |
||
2329 | popad |
||
2330 | mov eax, ERROR_DISK_FULL |
||
2331 | xor ebx, ebx |
||
2332 | ret |
||
2333 | .free: |
||
2334 | test ecx, ecx |
||
2335 | jnz @f |
||
2336 | mov [esp], edi |
||
2337 | mov ecx, [esp+12+8+12+8] |
||
2338 | mov [esp+4], ecx |
||
2339 | mov ecx, [esp+12+8+12+12] |
||
2340 | mov [esp+8], ecx |
||
2341 | xor ecx, ecx |
||
2342 | @@: |
||
2343 | inc ecx |
||
2344 | cmp ecx, eax |
||
2345 | jb .scan_cont |
||
2346 | ; found! |
||
2347 | ; calculate name checksum |
||
2348 | push esi ecx |
||
2349 | mov esi, [esp+8+12] |
||
2350 | mov ecx, 11 |
||
2351 | xor eax, eax |
||
2352 | @@: |
||
2353 | ror al, 1 |
||
2354 | add al, [esi] |
||
2355 | inc esi |
||
2356 | loop @b |
||
2357 | pop ecx esi |
||
2358 | pop edi |
||
2359 | pop dword [esp+8+12+12] |
||
2360 | pop dword [esp+8+12+12] |
||
2361 | ; edi points to first entry in free chunk |
||
2362 | dec ecx |
||
2363 | jz .nolfn |
||
2364 | push esi |
||
2365 | push eax |
||
2366 | lea eax, [esp+8+8+12+8] |
||
2367 | call dword [eax+8] ; begin write |
||
2368 | mov al, 40h |
||
2369 | .writelfn: |
||
2370 | or al, cl |
||
2371 | mov esi, [esp+4] |
||
2372 | push ecx |
||
2373 | dec ecx |
||
2374 | imul ecx, 13 |
||
2375 | add esi, ecx |
||
2376 | stosb |
||
2377 | mov cl, 5 |
||
2378 | call fs_RamdiskRewrite.read_symbols |
||
2379 | mov ax, 0xF |
||
2380 | stosw |
||
2381 | mov al, [esp+4] |
||
2382 | stosb |
||
2383 | mov cl, 6 |
||
2384 | call fs_RamdiskRewrite.read_symbols |
||
2385 | xor eax, eax |
||
2386 | stosw |
||
2387 | mov cl, 2 |
||
2388 | call fs_RamdiskRewrite.read_symbols |
||
2389 | pop ecx |
||
2390 | lea eax, [esp+8+8+12+8] |
||
2391 | call dword [eax+12] ; next write |
||
2392 | xor eax, eax |
||
2393 | loop .writelfn |
||
2394 | pop eax |
||
2395 | pop esi |
||
2396 | ; lea eax, [esp+8+12+8] |
||
2397 | ; call dword [eax+16] ; end write |
||
2398 | .nolfn: |
||
2399 | xchg esi, [esp] |
||
2400 | mov ecx, 11 |
||
2401 | rep movsb |
||
2402 | mov word [edi], 20h ; attributes |
||
2403 | sub edi, 11 |
||
2404 | pop esi ecx |
||
2405 | add esp, 12 |
||
2406 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
2407 | call get_time_for_file |
||
2408 | mov [edi+14], ax ; creation time |
||
2409 | mov [edi+22], ax ; last write time |
||
2410 | call get_date_for_file |
||
2411 | mov [edi+16], ax ; creation date |
||
2412 | mov [edi+24], ax ; last write date |
||
2413 | mov [edi+18], ax ; last access date |
||
2414 | xor ecx, ecx |
||
2415 | mov word [edi+20], cx ; high word of cluster |
||
2416 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
2417 | mov dword [edi+28], ecx ; file size - to be filled |
||
321 | diamond | 2418 | cmp byte [esp+32+28], cl |
2419 | jz .doit |
||
2420 | ; create directory |
||
2421 | mov byte [edi+11], 10h ; attributes: folder |
||
2422 | mov edx, edi |
||
2423 | lea eax, [esp+8] |
||
2424 | call dword [eax+16] ; flush directory |
||
2425 | push ecx |
||
2426 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2427 | shl ecx, 9 |
||
2428 | jmp .doit2 |
||
83 | diamond | 2429 | .doit: |
2430 | lea eax, [esp+8] |
||
2431 | call dword [eax+16] ; flush directory |
||
2432 | push ecx |
||
2433 | mov ecx, [esp+4+32+24] |
||
321 | diamond | 2434 | .doit2: |
83 | diamond | 2435 | push ecx |
2436 | push edi |
||
2437 | mov esi, edx |
||
2438 | test ecx, ecx |
||
2439 | jz .done |
||
2440 | mov eax, 2 |
||
2441 | call get_free_FAT |
||
2442 | jc .diskfull |
||
2443 | push eax |
||
2444 | mov [edi+26], ax |
||
2445 | shr eax, 16 |
||
2446 | mov [edi+20], ax |
||
2447 | lea eax, [esp+16+8] |
||
2448 | call dword [eax+16] ; flush directory |
||
2449 | pop eax |
||
2450 | push edx |
||
2451 | mov edx, [fatEND] |
||
2452 | call set_FAT |
||
2453 | pop edx |
||
2454 | .write_cluster: |
||
2455 | push eax |
||
2456 | dec eax |
||
2457 | dec eax |
||
2458 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2459 | imul eax, ebp |
||
2460 | add eax, [DATA_START] |
||
2461 | ; write data |
||
2462 | .write_sector: |
||
321 | diamond | 2463 | cmp byte [esp+16+32+28], 0 |
2464 | jnz .writedir |
||
83 | diamond | 2465 | mov ecx, 512 |
2466 | cmp dword [esp+8], ecx |
||
2467 | jb .writeshort |
||
2468 | ; we can write directly from given buffer |
||
2469 | mov ebx, esi |
||
2470 | add esi, ecx |
||
2471 | jmp .writecommon |
||
2472 | .writeshort: |
||
2473 | mov ecx, [esp+8] |
||
2474 | push ecx |
||
2475 | mov edi, buffer |
||
2476 | mov ebx, edi |
||
2477 | rep movsb |
||
321 | diamond | 2478 | .writedircont: |
83 | diamond | 2479 | mov ecx, buffer+0x200 |
2480 | sub ecx, edi |
||
2481 | push eax |
||
2482 | xor eax, eax |
||
2483 | rep stosb |
||
2484 | pop eax |
||
2485 | pop ecx |
||
2486 | .writecommon: |
||
2487 | call hd_write |
||
2488 | cmp [hd_error], 0 |
||
2489 | jnz .writeerr |
||
2490 | inc eax |
||
2491 | sub dword [esp+8], ecx |
||
2492 | jz .writedone |
||
2493 | dec ebp |
||
2494 | jnz .write_sector |
||
2495 | ; allocate new cluster |
||
2496 | pop eax |
||
2497 | mov ecx, eax |
||
2498 | call get_free_FAT |
||
2499 | jc .diskfull |
||
2500 | push edx |
||
2501 | mov edx, [fatEND] |
||
2502 | call set_FAT |
||
2503 | xchg eax, ecx |
||
2504 | mov edx, ecx |
||
2505 | call set_FAT |
||
2506 | pop edx |
||
2507 | xchg eax, ecx |
||
2508 | jmp .write_cluster |
||
2509 | .diskfull: |
||
2510 | mov eax, ERROR_DISK_FULL |
||
2511 | jmp .ret |
||
2512 | .writeerr: |
||
2513 | pop eax |
||
2514 | sub esi, ecx |
||
2515 | mov eax, 11 |
||
2516 | jmp .ret |
||
2517 | .writedone: |
||
2518 | pop eax |
||
2519 | .done: |
||
2520 | xor eax, eax |
||
2521 | .ret: |
||
2522 | pop edi ecx |
||
2523 | mov ebx, esi |
||
2524 | sub ebx, edx |
||
2525 | pop ebp |
||
2526 | mov [esp+32+28], eax |
||
2527 | lea eax, [esp+8] |
||
2528 | call dword [eax+8] |
||
2529 | mov [edi+28], ebx |
||
2530 | call dword [eax+16] |
||
2531 | mov [esp+32+16], ebx |
||
2532 | lea eax, [ebx+511] |
||
2533 | shr eax, 9 |
||
2534 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2535 | lea eax, [eax+ecx-1] |
||
2536 | xor edx, edx |
||
2537 | div ecx |
||
2538 | mov ecx, ebp |
||
2539 | sub ecx, eax |
||
2540 | call add_disk_free_space |
||
2541 | add esp, 32 |
||
2542 | call update_disk |
||
2543 | popad |
||
2544 | ret |
||
321 | diamond | 2545 | .writedir: |
2546 | push 512 |
||
2547 | mov edi, buffer |
||
2548 | mov ebx, edi |
||
2549 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2550 | shl ecx, 9 |
||
2551 | cmp ecx, [esp+12] |
||
2552 | jnz .writedircont |
||
2553 | dec dword [esp+16] |
||
2554 | push esi |
||
2555 | mov ecx, 32/4 |
||
2556 | rep movsd |
||
2557 | pop esi |
||
2558 | mov dword [edi-32], '. ' |
||
2559 | mov dword [edi-32+4], ' ' |
||
2560 | mov dword [edi-32+8], ' ' |
||
2561 | mov byte [edi-32+11], 10h |
||
2562 | push esi |
||
2563 | mov ecx, 32/4 |
||
2564 | rep movsd |
||
2565 | pop esi |
||
2566 | mov dword [edi-32], '.. ' |
||
2567 | mov dword [edi-32+4], ' ' |
||
2568 | mov dword [edi-32+8], ' ' |
||
2569 | mov byte [edi-32+11], 10h |
||
2570 | mov ecx, [esp+20+8] |
||
2571 | cmp ecx, [ROOT_CLUSTER] |
||
2572 | jnz @f |
||
2573 | xor ecx, ecx |
||
2574 | @@: |
||
2575 | mov word [edi-32+26], cx |
||
2576 | shr ecx, 16 |
||
2577 | mov [edi-32+20], cx |
||
2578 | jmp .writedircont |
||
83 | diamond | 2579 | |
131 | diamond | 2580 | ;---------------------------------------------------------------- |
2581 | ; |
||
256 | diamond | 2582 | ; fs_HdWrite - LFN variant for writing to hard disk |
131 | diamond | 2583 | ; |
2584 | ; esi points to filename |
||
2585 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2586 | ; may be ebx=0 - start from first byte |
||
2587 | ; ecx number of bytes to write, 0+ |
||
2588 | ; edx mem location to data |
||
2589 | ; |
||
2590 | ; ret ebx = bytes written (maybe 0) |
||
2591 | ; eax = 0 ok write or other = errormsg |
||
2592 | ; |
||
2593 | ;-------------------------------------------------------------- |
||
2594 | fs_HdWrite.access_denied: |
||
2595 | push ERROR_ACCESS_DENIED |
||
2596 | fs_HdWrite.ret0: |
||
2597 | pop eax |
||
2598 | xor ebx, ebx |
||
2599 | ret |
||
2600 | |||
2601 | fs_HdWrite.ret11: |
||
2602 | push 11 |
||
2603 | jmp fs_HdWrite.ret0 |
||
2604 | |||
2605 | fs_HdWrite: |
||
256 | diamond | 2606 | cmp [fs_type], 1 |
2607 | jz ntfs_HdWrite |
||
2608 | cmp [fs_type], 16 |
||
2609 | jz @f |
||
2610 | cmp [fs_type], 32 |
||
2611 | jz @f |
||
131 | diamond | 2612 | push ERROR_UNKNOWN_FS |
2613 | jmp .ret0 |
||
2614 | @@: |
||
2615 | cmp byte [esi], 0 |
||
2616 | jz .access_denied |
||
2617 | pushad |
||
2618 | call hd_find_lfn |
||
2619 | pushfd |
||
2620 | cmp [hd_error], 0 |
||
2621 | jz @f |
||
2622 | popfd |
||
2623 | popad |
||
2624 | push 11 |
||
2625 | jmp .ret0 |
||
2626 | @@: |
||
2627 | popfd |
||
2628 | jnc .found |
||
2629 | popad |
||
2630 | push ERROR_FILE_NOT_FOUND |
||
2631 | jmp .ret0 |
||
2632 | .found: |
||
2633 | ; FAT does not support files larger than 4GB |
||
2634 | test ebx, ebx |
||
2635 | jz .l1 |
||
2636 | cmp dword [ebx+4], 0 |
||
2637 | jz @f |
||
2638 | .eof: |
||
2639 | popad |
||
2640 | push ERROR_END_OF_FILE |
||
2641 | jmp .ret0 |
||
2642 | @@: |
||
2643 | mov ebx, [ebx] |
||
2644 | .l1: |
||
2645 | ; now edi points to direntry, ebx=start byte to write, |
||
2646 | ; ecx=number of bytes to write, edx=data pointer |
||
2647 | |||
2648 | ; extend file if needed |
||
2649 | add ecx, ebx |
||
2650 | jc .eof ; FAT does not support files larger than 4GB |
||
2651 | push eax ; save directory sector |
||
2652 | push 0 ; return value=0 |
||
2653 | |||
2654 | call get_time_for_file |
||
2655 | mov [edi+22], ax ; last write time |
||
2656 | call get_date_for_file |
||
2657 | mov [edi+24], ax ; last write date |
||
2658 | mov [edi+18], ax ; last access date |
||
2659 | |||
2660 | push dword [edi+28] ; save current file size |
||
2661 | cmp ecx, [edi+28] |
||
2662 | jbe .length_ok |
||
2663 | cmp ecx, ebx |
||
2664 | jz .length_ok |
||
2665 | call hd_extend_file |
||
2666 | jnc .length_ok |
||
2667 | mov [esp+4], eax |
||
2668 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2669 | ; First two cases are fatal errors, in third case we may write some data |
||
2670 | cmp al, ERROR_DISK_FULL |
||
2671 | jz .disk_full |
||
2672 | pop eax |
||
2673 | pop eax |
||
2674 | mov [esp+4+28], eax |
||
2675 | pop eax |
||
2676 | popad |
||
2677 | xor ebx, ebx |
||
2678 | ret |
||
2679 | .disk_full: |
||
2680 | ; correct number of bytes to write |
||
2681 | mov ecx, [edi+28] |
||
2682 | cmp ecx, ebx |
||
2683 | ja .length_ok |
||
2684 | .ret: |
||
2685 | call update_disk |
||
2686 | cmp [hd_error], 0 |
||
2687 | jz @f |
||
2688 | mov byte [esp+4], 11 |
||
2689 | @@: |
||
2690 | pop eax |
||
2691 | pop eax |
||
2692 | mov [esp+4+28], eax ; eax=return value |
||
2693 | pop eax |
||
2694 | sub edx, [esp+20] |
||
2695 | mov [esp+16], edx ; ebx=number of written bytes |
||
2696 | popad |
||
2697 | ret |
||
2698 | .length_ok: |
||
2699 | mov esi, [edi+28] |
||
2700 | mov eax, [edi+20-2] |
||
2701 | mov ax, [edi+26] |
||
2702 | mov edi, eax ; edi=current cluster |
||
2703 | xor ebp, ebp ; ebp=current sector in cluster |
||
2704 | ; save directory |
||
2705 | mov eax, [esp+8] |
||
2706 | push ebx |
||
2707 | mov ebx, buffer |
||
2708 | call hd_write |
||
2709 | pop ebx |
||
2710 | cmp [hd_error], 0 |
||
2711 | jz @f |
||
2712 | .device_err: |
||
2713 | mov byte [esp+4], 11 |
||
2714 | jmp .ret |
||
2715 | @@: |
||
2716 | |||
2717 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
2718 | sub ecx, ebx |
||
2719 | jz .ret |
||
2720 | .write_loop: |
||
321 | diamond | 2721 | ; skip unmodified sectors |
2722 | cmp dword [esp], 0x200 |
||
2723 | jb .modify |
||
2724 | sub ebx, 0x200 |
||
2725 | jae .skip |
||
2726 | add ebx, 0x200 |
||
2727 | .modify: |
||
131 | diamond | 2728 | ; get length of data in current sector |
2729 | push ecx |
||
2730 | sub ebx, 0x200 |
||
2731 | jb .hasdata |
||
2732 | neg ebx |
||
2733 | xor ecx, ecx |
||
2734 | jmp @f |
||
2735 | .hasdata: |
||
2736 | neg ebx |
||
2737 | cmp ecx, ebx |
||
2738 | jbe @f |
||
2739 | mov ecx, ebx |
||
2740 | @@: |
||
2741 | ; get current sector number |
||
2742 | mov eax, edi |
||
2743 | dec eax |
||
2744 | dec eax |
||
2745 | imul eax, [SECTORS_PER_CLUSTER] |
||
2746 | add eax, [DATA_START] |
||
2747 | add eax, ebp |
||
2748 | ; load sector if needed |
||
2749 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
2750 | jz .noread |
||
2751 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2752 | jz .noread |
||
2753 | cmp ecx, esi ; (same for the last sector) |
||
2754 | jz .noread |
||
2755 | push ebx |
||
2756 | mov ebx, buffer |
||
2757 | call hd_read |
||
2758 | pop ebx |
||
2759 | cmp [hd_error], 0 |
||
2760 | jz @f |
||
2761 | .device_err2: |
||
2762 | pop ecx |
||
2763 | jmp .device_err |
||
2764 | @@: |
||
2765 | .noread: |
||
2766 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2767 | push eax ecx edi |
||
2768 | xor eax, eax |
||
2769 | mov ecx, 0x200 |
||
2770 | sub ecx, [esp+4+12] |
||
2771 | jbe @f |
||
2772 | mov edi, buffer |
||
2773 | add edi, [esp+4+12] |
||
2774 | rep stosb |
||
2775 | @@: |
||
2776 | ; zero uninitialized data in the last sector |
||
2777 | mov ecx, 0x200 |
||
2778 | sub ecx, esi |
||
2779 | jbe @f |
||
2780 | mov edi, buffer |
||
2781 | add edi, esi |
||
2782 | rep stosb |
||
2783 | @@: |
||
321 | diamond | 2784 | pop edi ecx |
131 | diamond | 2785 | ; copy new data |
2786 | mov eax, edx |
||
2787 | neg ebx |
||
2788 | jecxz @f |
||
2789 | add ebx, buffer+0x200 |
||
2790 | call memmove |
||
2791 | xor ebx, ebx |
||
2792 | @@: |
||
2793 | pop eax |
||
2794 | ; save sector |
||
2795 | push ebx |
||
2796 | mov ebx, buffer |
||
2797 | call hd_write |
||
2798 | pop ebx |
||
2799 | cmp [hd_error], 0 |
||
2800 | jnz .device_err2 |
||
2801 | add edx, ecx |
||
2802 | sub [esp], ecx |
||
2803 | pop ecx |
||
2804 | jz .ret |
||
321 | diamond | 2805 | .skip: |
131 | diamond | 2806 | ; next sector |
2807 | inc ebp |
||
2808 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2809 | jb @f |
||
2810 | xor ebp, ebp |
||
2811 | mov eax, edi |
||
2812 | call get_FAT |
||
2813 | mov edi, eax |
||
2814 | cmp [hd_error], 0 |
||
2815 | jnz .device_err |
||
2816 | @@: |
||
2817 | sub esi, 0x200 |
||
2818 | jae @f |
||
2819 | xor esi, esi |
||
2820 | @@: |
||
2821 | sub dword [esp], 0x200 |
||
2822 | jae @f |
||
2823 | and dword [esp], 0 |
||
2824 | @@: jmp .write_loop |
||
2825 | |||
2826 | hd_extend_file.zero_size: |
||
2827 | xor eax, eax |
||
2828 | jmp hd_extend_file.start_extend |
||
2829 | |||
2830 | ; extends file on hd to given size (new data area is undefined) |
||
2831 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 2832 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 2833 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
2834 | hd_extend_file: |
||
2835 | push ebp |
||
2836 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2837 | imul ebp, [BYTES_PER_SECTOR] |
||
2838 | push ecx |
||
2839 | ; find the last cluster of file |
||
2840 | mov eax, [edi+20-2] |
||
2841 | mov ax, [edi+26] |
||
2842 | mov ecx, [edi+28] |
||
2843 | jecxz .zero_size |
||
2844 | .last_loop: |
||
2845 | sub ecx, ebp |
||
2846 | jbe .last_found |
||
2847 | call get_FAT |
||
2848 | cmp [hd_error], 0 |
||
2849 | jz @f |
||
2850 | .device_err: |
||
2851 | pop ecx |
||
2852 | .device_err2: |
||
2853 | pop ebp |
||
2854 | push 11 |
||
2855 | .ret_err: |
||
2856 | pop eax |
||
2857 | stc |
||
2858 | ret |
||
2859 | @@: |
||
2860 | cmp eax, 2 |
||
2861 | jb .fat_err |
||
2862 | cmp eax, [fatRESERVED] |
||
2863 | jb .last_loop |
||
2864 | .fat_err: |
||
2865 | pop ecx ebp |
||
2866 | push ERROR_FAT_TABLE |
||
2867 | jmp .ret_err |
||
2868 | .last_found: |
||
2869 | push eax |
||
2870 | call get_FAT |
||
2871 | cmp [hd_error], 0 |
||
2872 | jz @f |
||
2873 | pop eax |
||
2874 | jmp .device_err |
||
2875 | @@: |
||
2876 | cmp eax, [fatRESERVED] |
||
2877 | pop eax |
||
2878 | jb .fat_err |
||
2879 | ; set length to full number of clusters |
||
2880 | sub [edi+28], ecx |
||
2881 | .start_extend: |
||
2882 | pop ecx |
||
2883 | ; now do extend |
||
2884 | push edx |
||
2885 | mov edx, 2 ; start scan from cluster 2 |
||
2886 | .extend_loop: |
||
2887 | cmp [edi+28], ecx |
||
2888 | jae .extend_done |
||
2889 | ; add new cluster |
||
2890 | push eax |
||
2891 | mov eax, edx |
||
2892 | call get_free_FAT |
||
2893 | jc .disk_full |
||
2894 | mov edx, [fatEND] |
||
2895 | call set_FAT |
||
2896 | mov edx, eax |
||
2897 | pop eax |
||
2898 | test eax, eax |
||
2899 | jz .first_cluster |
||
2900 | push edx |
||
2901 | call set_FAT |
||
2902 | pop edx |
||
2903 | jmp @f |
||
2904 | .first_cluster: |
||
2905 | ror edx, 16 |
||
2906 | mov [edi+20], dx |
||
2907 | ror edx, 16 |
||
2908 | mov [edi+26], dx |
||
2909 | @@: |
||
133 | diamond | 2910 | push ecx |
2911 | mov ecx, -1 |
||
2912 | call add_disk_free_space |
||
2913 | pop ecx |
||
131 | diamond | 2914 | mov eax, edx |
2915 | cmp [hd_error], 0 |
||
2916 | jnz .device_err3 |
||
2917 | add [edi+28], ebp |
||
2918 | jmp .extend_loop |
||
2919 | .extend_done: |
||
2920 | mov [edi+28], ecx |
||
2921 | pop edx ebp |
||
133 | diamond | 2922 | xor eax, eax ; CF=0 |
131 | diamond | 2923 | ret |
2924 | .device_err3: |
||
2925 | pop edx |
||
2926 | jmp .device_err2 |
||
2927 | .disk_full: |
||
2928 | pop eax edx ebp |
||
2929 | push ERROR_DISK_FULL |
||
2930 | pop eax |
||
2931 | cmp [hd_error], 0 |
||
2932 | jz @f |
||
2933 | mov al, 11 |
||
2934 | @@: stc |
||
2935 | ret |
||
2936 | |||
133 | diamond | 2937 | ;---------------------------------------------------------------- |
2938 | ; |
||
2939 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
2940 | ; |
||
2941 | ; esi points to filename |
||
2942 | ; ebx points to 64-bit number = new file size |
||
2943 | ; ecx ignored (reserved) |
||
2944 | ; edx ignored (reserved) |
||
2945 | ; |
||
2946 | ; ret eax = 0 ok or other = errormsg |
||
2947 | ; |
||
2948 | ;-------------------------------------------------------------- |
||
2949 | fs_HdSetFileEnd: |
||
256 | diamond | 2950 | cmp [fs_type], 1 |
2951 | jz ntfs_HdSetFileEnd |
||
2952 | cmp [fs_type], 16 |
||
2953 | jz @f |
||
2954 | cmp [fs_type], 32 |
||
2955 | jz @f |
||
133 | diamond | 2956 | push ERROR_UNKNOWN_FS |
2957 | .ret: |
||
2958 | pop eax |
||
2959 | ret |
||
2960 | @@: |
||
2961 | cmp byte [esi], 0 |
||
2962 | jnz @f |
||
2963 | .access_denied: |
||
2964 | push ERROR_ACCESS_DENIED |
||
2965 | jmp .ret |
||
2966 | @@: |
||
2967 | push edi |
||
2968 | call hd_find_lfn |
||
2969 | pushfd |
||
2970 | cmp [hd_error], 0 |
||
2971 | jz @f |
||
2972 | popfd |
||
2973 | push 11 |
||
2974 | jmp .ret |
||
2975 | @@: |
||
2976 | popfd |
||
2977 | jnc @f |
||
2978 | pop edi |
||
2979 | push ERROR_FILE_NOT_FOUND |
||
2980 | jmp .ret |
||
2981 | @@: |
||
2982 | ; must not be directory |
||
2983 | test byte [edi+11], 10h |
||
2984 | jz @f |
||
2985 | pop edi |
||
2986 | jmp .access_denied |
||
2987 | @@: |
||
2988 | ; file size must not exceed 4 Gb |
||
2989 | cmp dword [ebx+4], 0 |
||
2990 | jz @f |
||
2991 | pop edi |
||
2992 | push ERROR_END_OF_FILE |
||
2993 | jmp .ret |
||
2994 | @@: |
||
2995 | push eax ; save directory sector |
||
2996 | ; set file modification date/time to current |
||
2997 | call fat_update_datetime |
||
2998 | mov eax, [ebx] |
||
2999 | cmp eax, [edi+28] |
||
3000 | jb .truncate |
||
3001 | ja .expand |
||
3002 | pop eax |
||
3003 | mov ebx, buffer |
||
3004 | call hd_write |
||
3005 | pop edi |
||
3006 | xor eax, eax |
||
3007 | cmp [hd_error], 0 |
||
3008 | jz @f |
||
3009 | mov al, 11 |
||
3010 | @@: |
||
3011 | ret |
||
3012 | .expand: |
||
3013 | push ebx ebp ecx |
||
3014 | push dword [edi+28] ; save old size |
||
3015 | mov ecx, eax |
||
3016 | call hd_extend_file |
||
3017 | push eax ; return code |
||
3018 | jnc .expand_ok |
||
3019 | cmp al, ERROR_DISK_FULL |
||
3020 | jz .disk_full |
||
3021 | .pop_ret: |
||
3022 | call update_disk |
||
3023 | pop eax ecx ebp ebx ecx edi edi |
||
3024 | ret |
||
3025 | .expand_ok: |
||
3026 | .disk_full: |
||
3027 | ; save directory |
||
3028 | mov eax, [edi+28] |
||
3029 | xchg eax, [esp+20] |
||
3030 | mov ebx, buffer |
||
3031 | call hd_write |
||
3032 | mov eax, [edi+20-2] |
||
3033 | mov ax, [edi+26] |
||
3034 | mov edi, eax |
||
3035 | cmp [hd_error], 0 |
||
3036 | jz @f |
||
3037 | .pop_ret11: |
||
3038 | mov byte [esp], 11 |
||
3039 | jmp .pop_ret |
||
3040 | @@: |
||
3041 | ; now zero new data |
||
3042 | xor ebp, ebp |
||
3043 | ; edi=current cluster, ebp=sector in cluster |
||
3044 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
||
3045 | .zero_loop: |
||
3046 | sub dword [esp+4], 0x200 |
||
3047 | jae .next_cluster |
||
3048 | lea eax, [edi-2] |
||
3049 | imul eax, [SECTORS_PER_CLUSTER] |
||
3050 | add eax, [DATA_START] |
||
3051 | add eax, ebp |
||
3052 | cmp dword [esp+4], -0x200 |
||
3053 | jz .noread |
||
3054 | mov ebx, buffer |
||
3055 | call hd_read |
||
3056 | cmp [hd_error], 0 |
||
3057 | jnz .err_next |
||
3058 | .noread: |
||
3059 | mov ecx, [esp+4] |
||
3060 | neg ecx |
||
3061 | push edi |
||
3062 | mov edi, buffer+0x200 |
||
3063 | add edi, [esp+8] |
||
3064 | push eax |
||
3065 | xor eax, eax |
||
3066 | mov [esp+12], eax |
||
3067 | rep stosb |
||
3068 | pop eax |
||
3069 | pop edi |
||
3070 | call hd_write |
||
3071 | cmp [hd_error], 0 |
||
3072 | jz .next_cluster |
||
3073 | .err_next: |
||
3074 | mov byte [esp], 11 |
||
3075 | .next_cluster: |
||
3076 | sub dword [esp+20], 0x200 |
||
3077 | jbe .pop_ret |
||
3078 | inc ebp |
||
3079 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
3080 | jb .zero_loop |
||
3081 | xor ebp, ebp |
||
3082 | mov eax, edi |
||
3083 | call get_FAT |
||
3084 | mov edi, eax |
||
3085 | cmp [hd_error], 0 |
||
3086 | jnz .pop_ret11 |
||
3087 | jmp .zero_loop |
||
3088 | .truncate: |
||
3089 | mov [edi+28], eax |
||
3090 | push ecx |
||
3091 | mov ecx, [edi+20-2] |
||
3092 | mov cx, [edi+26] |
||
3093 | push eax |
||
3094 | test eax, eax |
||
3095 | jz .zero_size |
||
3096 | ; find new last cluster |
||
3097 | @@: |
||
3098 | mov eax, [SECTORS_PER_CLUSTER] |
||
3099 | shl eax, 9 |
||
3100 | sub [esp], eax |
||
3101 | jbe @f |
||
3102 | mov eax, ecx |
||
3103 | call get_FAT |
||
3104 | mov ecx, eax |
||
3105 | cmp [hd_error], 0 |
||
3106 | jz @b |
||
3107 | .device_err3: |
||
3108 | pop eax ecx eax edi |
||
3109 | push 11 |
||
3110 | pop eax |
||
3111 | ret |
||
3112 | @@: |
||
3113 | ; we will zero data at the end of last sector - remember it |
||
3114 | push ecx |
||
3115 | ; terminate FAT chain |
||
3116 | push edx |
||
3117 | mov eax, ecx |
||
3118 | mov edx, [fatEND] |
||
3119 | call set_FAT |
||
3120 | mov eax, edx |
||
3121 | pop edx |
||
3122 | cmp [hd_error], 0 |
||
3123 | jz @f |
||
3124 | .device_err4: |
||
3125 | pop ecx |
||
3126 | jmp .device_err3 |
||
3127 | .zero_size: |
||
3128 | and word [edi+20], 0 |
||
3129 | and word [edi+26], 0 |
||
3130 | push 0 |
||
3131 | mov eax, ecx |
||
3132 | @@: |
||
3133 | ; delete FAT chain |
||
3134 | call clear_cluster_chain |
||
3135 | cmp [hd_error], 0 |
||
3136 | jnz .device_err4 |
||
3137 | ; save directory |
||
3138 | mov eax, [esp+12] |
||
3139 | push ebx |
||
3140 | mov ebx, buffer |
||
3141 | call hd_write |
||
3142 | pop ebx |
||
3143 | cmp [hd_error], 0 |
||
3144 | jnz .device_err4 |
||
3145 | ; zero last sector, ignore errors |
||
3146 | pop ecx |
||
3147 | pop eax |
||
3148 | dec ecx |
||
3149 | imul ecx, [SECTORS_PER_CLUSTER] |
||
3150 | add ecx, [DATA_START] |
||
3151 | push eax |
||
3152 | sar eax, 9 |
||
3153 | add ecx, eax |
||
3154 | pop eax |
||
3155 | and eax, 0x1FF |
||
3156 | jz .truncate_done |
||
3157 | push ebx eax |
||
3158 | mov eax, ecx |
||
3159 | mov ebx, buffer |
||
3160 | call hd_read |
||
3161 | pop eax |
||
3162 | lea edi, [buffer+eax] |
||
3163 | push ecx |
||
3164 | mov ecx, 0x200 |
||
3165 | sub ecx, eax |
||
3166 | xor eax, eax |
||
3167 | rep stosb |
||
3168 | pop eax |
||
3169 | call hd_write |
||
3170 | pop ebx |
||
3171 | .truncate_done: |
||
3172 | pop ecx eax edi |
||
3173 | call update_disk |
||
3174 | xor eax, eax |
||
3175 | cmp [hd_error], 0 |
||
3176 | jz @f |
||
3177 | mov al, 11 |
||
3178 | @@: |
||
3179 | ret |
||
3180 | |||
86 | diamond | 3181 | fs_HdGetFileInfo: |
256 | diamond | 3182 | cmp [fs_type], 1 |
3183 | jz ntfs_HdGetFileInfo |
||
3184 | cmp [fs_type], 16 |
||
3185 | jz @f |
||
3186 | cmp [fs_type], 32 |
||
3187 | jz @f |
||
86 | diamond | 3188 | mov eax, ERROR_UNKNOWN_FS |
3189 | ret |
||
3190 | @@: |
||
3191 | cmp byte [esi], 0 |
||
3192 | jnz @f |
||
3193 | mov eax, 2 |
||
3194 | ret |
||
3195 | @@: |
||
3196 | push edi |
||
3197 | call hd_find_lfn |
||
3198 | pushfd |
||
3199 | cmp [hd_error], 0 |
||
3200 | jz @f |
||
3201 | popfd |
||
3202 | pop edi |
||
3203 | mov eax, 11 |
||
3204 | ret |
||
3205 | @@: |
||
3206 | popfd |
||
3207 | jmp fs_GetFileInfo_finish |
||
3208 | |||
3209 | fs_HdSetFileInfo: |
||
256 | diamond | 3210 | cmp [fs_type], 1 |
3211 | jz ntfs_HdSetFileInfo |
||
3212 | cmp [fs_type], 16 |
||
3213 | jz @f |
||
3214 | cmp [fs_type], 32 |
||
3215 | jz @f |
||
86 | diamond | 3216 | mov eax, ERROR_UNKNOWN_FS |
3217 | ret |
||
3218 | @@: |
||
3219 | cmp byte [esi], 0 |
||
3220 | jnz @f |
||
3221 | mov eax, 2 |
||
3222 | ret |
||
3223 | @@: |
||
3224 | push edi |
||
3225 | call hd_find_lfn |
||
3226 | pushfd |
||
3227 | cmp [hd_error], 0 |
||
3228 | jz @f |
||
3229 | popfd |
||
3230 | pop edi |
||
3231 | mov eax, 11 |
||
3232 | ret |
||
3233 | @@: |
||
3234 | popfd |
||
3235 | jnc @f |
||
3236 | pop edi |
||
3237 | mov eax, ERROR_FILE_NOT_FOUND |
||
3238 | ret |
||
3239 | @@: |
||
3240 | push eax |
||
3241 | call bdfe_to_fat_entry |
||
3242 | pop eax |
||
3243 | mov ebx, buffer |
||
3244 | call hd_write |
||
3245 | call update_disk |
||
3246 | pop edi |
||
3247 | xor eax, eax |
||
3248 | ret |
||
3249 | |||
256 | diamond | 3250 | if 0 ; starting from revision 237 execute is implemented in taskman.inc |
3251 | ; through fs_XxxGetFileInfo and fs_XxxRead |
||
91 | diamond | 3252 | ;---------------------------------------------------------------- |
3253 | ; |
||
3254 | ; fs_HdExecute - LFN variant for executing from harddisk |
||
3255 | ; |
||
3256 | ; esi points to hd filename (e.g. 'dir1/name') |
||
3257 | ; ebp points to full filename (e.g. '/hd0/1/dir1/name') |
||
3258 | ; dword [ebx] = flags |
||
3259 | ; dword [ebx+4] = cmdline |
||
3260 | ; |
||
3261 | ; ret ebx,edx destroyed |
||
3262 | ; eax > 0 - PID, < 0 - error |
||
3263 | ; |
||
3264 | ;-------------------------------------------------------------- |
||
3265 | fs_HdExecute: |
||
3266 | mov edx, [ebx] |
||
3267 | mov ebx, [ebx+4] |
||
3268 | test ebx, ebx |
||
3269 | jz @f |
||
465 | serge | 3270 | ; add ebx, std_application_base_address |
91 | diamond | 3271 | @@: |
3272 | |||
3273 | ;---------------------------------------------------------------- |
||
3274 | ; |
||
3275 | ; fs_HdExecute.flags - second entry |
||
3276 | ; |
||
3277 | ; esi points to floppy filename (kernel address) |
||
3278 | ; ebp points to full filename |
||
3279 | ; edx flags |
||
3280 | ; ebx cmdline (kernel address) |
||
3281 | ; |
||
3282 | ; ret eax > 0 - PID, < 0 - error |
||
3283 | ; |
||
3284 | ;-------------------------------------------------------------- |
||
3285 | |||
3286 | .flags: |
||
3287 | cmp [fat_type], 0 |
||
3288 | jnz @f |
||
171 | diamond | 3289 | mov eax, -ERROR_UNKNOWN_FS |
91 | diamond | 3290 | ret |
3291 | @@: |
||
3292 | cmp byte [esi], 0 |
||
3293 | jnz @f |
||
3294 | ; cannot execute root! |
||
3295 | mov eax, -ERROR_ACCESS_DENIED |
||
3296 | ret |
||
3297 | @@: |
||
3298 | push edi |
||
3299 | call hd_find_lfn |
||
3300 | jnc .found |
||
3301 | pop edi |
||
3302 | mov eax, -ERROR_FILE_NOT_FOUND |
||
3303 | cmp [hd_error], 0 |
||
3304 | jz @f |
||
3305 | mov al, -11 |
||
3306 | @@: |
||
3307 | ret |
||
3308 | .found: |
||
3309 | mov eax, [edi+20-2] |
||
3310 | mov ax, [edi+26] |
||
3311 | push 0 |
||
3312 | push eax |
||
3313 | push dword [edi+28] ; size |
||
3314 | push .DoRead |
||
3315 | call fs_execute |
||
3316 | add esp, 16 |
||
3317 | pop edi |
||
3318 | ret |
||
3319 | |||
3320 | .DoRead: |
||
3321 | ; read next block |
||
3322 | ; in: eax->parameters, edi->buffer |
||
3323 | ; out: eax = error code |
||
3324 | pushad |
||
3325 | cmp dword [eax], 0 ; file size |
||
3326 | jz .eof |
||
3327 | add eax, 4 |
||
3328 | call fat_get_sector |
||
3329 | mov ebx, edi |
||
3330 | call hd_read |
||
3331 | cmp [hd_error], 0 |
||
3332 | jnz .err |
||
3333 | mov eax, [esp+28] |
||
3334 | mov ecx, [eax] |
||
3335 | sub ecx, 512 |
||
3336 | jae @f |
||
3337 | lea edi, [edi+ecx+512] |
||
3338 | neg ecx |
||
3339 | push eax |
||
3340 | xor eax, eax |
||
3341 | rep stosb |
||
3342 | pop eax |
||
3343 | @@: |
||
3344 | mov [eax], ecx |
||
3345 | mov edx, [eax+8] |
||
3346 | inc edx |
||
3347 | cmp edx, [SECTORS_PER_CLUSTER] |
||
3348 | jb @f |
||
3349 | push eax |
||
3350 | mov eax, [eax+4] |
||
3351 | call get_FAT |
||
3352 | cmp [hd_error], 0 |
||
3353 | jnz .err |
||
3354 | mov ecx, eax |
||
3355 | pop eax |
||
3356 | mov [eax+4], ecx |
||
3357 | xor edx, edx |
||
3358 | @@: |
||
3359 | mov [eax+8], edx |
||
3360 | popad |
||
3361 | xor eax, eax |
||
3362 | ret |
||
3363 | .eof: |
||
3364 | popad |
||
3365 | mov eax, 6 |
||
3366 | ret |
||
3367 | .err: |
||
3368 | popad |
||
3369 | mov eax, 11 |
||
3370 | ret |
||
256 | diamond | 3371 | end if |
91 | diamond | 3372 | |
171 | diamond | 3373 | ;---------------------------------------------------------------- |
3374 | ; |
||
3375 | ; fs_HdDelete - delete file or empty folder from hard disk |
||
3376 | ; |
||
3377 | ; esi points to filename |
||
3378 | ; |
||
3379 | ; ret eax = 0 ok or other = errormsg |
||
3380 | ; |
||
3381 | ;-------------------------------------------------------------- |
||
3382 | fs_HdDelete: |
||
256 | diamond | 3383 | cmp [fs_type], 1 |
3384 | jz ntfs_HdDelete |
||
3385 | cmp [fs_type], 16 |
||
3386 | jz @f |
||
3387 | cmp [fs_type], 32 |
||
3388 | jz @f |
||
171 | diamond | 3389 | push ERROR_UNKNOWN_FS |
3390 | .pop_ret: |
||
3391 | pop eax |
||
3392 | ret |
||
3393 | @@: |
||
3394 | cmp byte [esi], 0 |
||
3395 | jnz @f |
||
3396 | ; cannot delete root! |
||
3397 | .access_denied: |
||
3398 | push ERROR_ACCESS_DENIED |
||
3399 | jmp .pop_ret |
||
3400 | @@: |
||
3401 | and [longname_sec1], 0 |
||
3402 | and [longname_sec2], 0 |
||
3403 | push edi |
||
3404 | call hd_find_lfn |
||
3405 | jnc .found |
||
3406 | pop edi |
||
3407 | push ERROR_FILE_NOT_FOUND |
||
3408 | jmp .pop_ret |
||
3409 | .found: |
||
3410 | cmp dword [edi], '. ' |
||
3411 | jz .access_denied2 |
||
3412 | cmp dword [edi], '.. ' |
||
3413 | jz .access_denied2 |
||
3414 | test byte [edi+11], 10h |
||
3415 | jz .dodel |
||
3416 | ; we can delete only empty folders! |
||
3417 | pushad |
||
3418 | mov ebp, [edi+20-2] |
||
3419 | mov bp, [edi+26] |
||
3420 | xor ecx, ecx |
||
3421 | lea eax, [ebp-2] |
||
3422 | imul eax, [SECTORS_PER_CLUSTER] |
||
3423 | add eax, [DATA_START] |
||
3424 | mov ebx, buffer |
||
3425 | call hd_read |
||
3426 | cmp [hd_error], 0 |
||
3427 | jnz .err1 |
||
3428 | add ebx, 2*0x20 |
||
3429 | .checkempty: |
||
3430 | cmp byte [ebx], 0 |
||
3431 | jz .empty |
||
3432 | cmp byte [ebx], 0xE5 |
||
3433 | jnz .notempty |
||
3434 | add ebx, 0x20 |
||
3435 | cmp ebx, buffer+0x200 |
||
3436 | jb .checkempty |
||
3437 | inc ecx |
||
3438 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
3439 | jb @f |
||
3440 | mov eax, ebp |
||
3441 | call get_FAT |
||
3442 | cmp [hd_error], 0 |
||
3443 | jnz .err1 |
||
3444 | mov ebp, eax |
||
3445 | xor ecx, ecx |
||
3446 | @@: |
||
3447 | lea eax, [ebp-2] |
||
3448 | imul eax, [SECTORS_PER_CLUSTER] |
||
3449 | add eax, [DATA_START] |
||
3450 | add eax, ecx |
||
3451 | mov ebx, buffer |
||
3452 | call hd_read |
||
3453 | cmp [hd_error], 0 |
||
3454 | jz .checkempty |
||
3455 | .err1: |
||
3456 | popad |
||
3457 | .err2: |
||
3458 | pop edi |
||
3459 | push 11 |
||
3460 | pop eax |
||
3461 | ret |
||
3462 | .notempty: |
||
3463 | popad |
||
3464 | .access_denied2: |
||
3465 | pop edi |
||
3466 | push ERROR_ACCESS_DENIED |
||
3467 | pop eax |
||
3468 | ret |
||
3469 | .empty: |
||
3470 | popad |
||
3471 | push ebx |
||
3472 | mov ebx, buffer |
||
3473 | call hd_read |
||
3474 | pop ebx |
||
3475 | cmp [hd_error], 0 |
||
3476 | jnz .err2 |
||
3477 | .dodel: |
||
3478 | push eax |
||
3479 | mov eax, [edi+20-2] |
||
3480 | mov ax, [edi+26] |
||
3481 | xchg eax, [esp] |
||
3482 | ; delete folder entry |
||
3483 | mov byte [edi], 0xE5 |
||
3484 | ; delete LFN (if present) |
||
3485 | .lfndel: |
||
3486 | cmp edi, buffer |
||
3487 | ja @f |
||
3488 | cmp [longname_sec2], 0 |
||
3489 | jz .lfndone |
||
3490 | push [longname_sec2] |
||
3491 | push [longname_sec1] |
||
3492 | pop [longname_sec2] |
||
3493 | and [longname_sec1], 0 |
||
3494 | push ebx |
||
3495 | mov ebx, buffer |
||
3496 | call hd_write |
||
3497 | mov eax, [esp+4] |
||
3498 | call hd_read |
||
3499 | pop ebx |
||
3500 | pop eax |
||
3501 | mov edi, buffer+0x200 |
||
3502 | @@: |
||
3503 | sub edi, 0x20 |
||
3504 | cmp byte [edi], 0xE5 |
||
3505 | jz .lfndone |
||
3506 | cmp byte [edi+11], 0xF |
||
3507 | jnz .lfndone |
||
3508 | mov byte [edi], 0xE5 |
||
3509 | jmp .lfndel |
||
3510 | .lfndone: |
||
3511 | push ebx |
||
3512 | mov ebx, buffer |
||
3513 | call hd_write |
||
3514 | pop ebx |
||
3515 | ; delete FAT chain |
||
3516 | pop eax |
||
3517 | call clear_cluster_chain |
||
3518 | call update_disk |
||
3519 | pop edi |
||
3520 | xor eax, eax |
||
3521 | cmp [hd_error], 0 |
||
3522 | jz @f |
||
3523 | mov al, 11 |
||
3524 | @@: |
||
3525 | ret |
||
3526 | |||
74 | mario79 | 3527 | ; \end{diamond}>>=>=>>>> |