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Rev | Author | Line No. | Line |
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495 | diamond | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
465 | serge | 2 | ;; ;; |
495 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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465 | serge | 6 | ;; FAT32.INC ;; |
7 | ;; ;; |
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8 | ;; FAT16/32 functions for KolibriOS ;; |
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9 | ;; ;; |
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10 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
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11 | ;; ;; |
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12 | ;; See file COPYING for details ;; |
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13 | ;; 04.02.2007 LFN create folder - diamond ;; |
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14 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
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15 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
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16 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
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17 | ;; 23.06.2006 LFN start application - diamond ;; |
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18 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
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19 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
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20 | ;; 04.05.2006 LFN read folder - diamond ;; |
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21 | ;; 29.04.2006 Elimination of hangup after the ;; |
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22 | ;; expiration hd_wait_timeout - Mario79 ;; |
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23 | ;; 23.04.2006 LFN read file - diamond ;; |
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24 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
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25 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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26 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
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27 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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28 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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29 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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30 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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31 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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32 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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33 | ;; 08.11.2004 rename - ATV ;; |
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34 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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35 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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36 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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37 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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38 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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39 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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40 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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41 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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42 | ;; 20.5.2002 Hd status check - VT ;; |
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43 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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44 | ;; ;; |
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593 | mikedld | 45 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ha | 46 | |
593 | mikedld | 47 | $Revision: 593 $ |
48 | |||
49 | |||
1 | ha | 50 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
51 | |||
52 | mikedld | 52 | ERROR_SUCCESS = 0 |
53 | ERROR_DISK_BASE = 1 |
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54 | ERROR_UNSUPPORTED_FS = 2 |
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55 | ERROR_UNKNOWN_FS = 3 |
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56 | ERROR_PARTITION = 4 |
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57 | ERROR_FILE_NOT_FOUND = 5 |
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58 | ERROR_END_OF_FILE = 6 |
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59 | ERROR_MEMORY_POINTER = 7 |
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60 | ERROR_DISK_FULL = 8 |
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61 | ERROR_FAT_TABLE = 9 |
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62 | ERROR_ACCESS_DENIED = 10 |
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1 | ha | 63 | |
64 | PUSHAD_EAX equ [esp+28] |
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65 | PUSHAD_ECX equ [esp+24] |
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66 | PUSHAD_EDX equ [esp+20] |
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67 | PUSHAD_EBX equ [esp+16] |
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68 | PUSHAD_EBP equ [esp+8] |
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69 | PUSHAD_ESI equ [esp+4] |
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70 | PUSHAD_EDI equ [esp+0] |
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71 | |||
171 | diamond | 72 | uglobal |
73 | align 4 |
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1 | ha | 74 | partition_count dd 0 ; partitions found by set_FAT32_variables |
75 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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76 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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77 | |||
78 | hd_error dd 0 ; set by wait_for_sector_buffer |
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79 | hd_setup dd 0 |
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80 | hd_wait_timeout dd 0 |
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81 | |||
82 | cluster_tmp dd 0 ; used by analyze_directory |
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83 | ; and analyze_directory_to_write |
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84 | |||
85 | file_size dd 0 ; used by file_read |
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86 | |||
87 | cache_search_start dd 0 ; used by find_empty_slot |
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171 | diamond | 88 | endg |
1 | ha | 89 | |
171 | diamond | 90 | iglobal |
1 | ha | 91 | fat_in_cache dd -1 |
171 | diamond | 92 | endg |
1 | ha | 93 | |
94 | uglobal |
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171 | diamond | 95 | align 4 |
96 | fat_cache: times 512 db 0 |
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1 | ha | 97 | Sector512: ; label for dev_hdcd.inc |
98 | buffer: times 512 db 0 |
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133 | diamond | 99 | fsinfo_buffer: times 512 db 0 |
1 | ha | 100 | endg |
101 | |||
102 | uglobal |
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103 | fat16_root db 0 ; flag for fat16 rootdir |
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104 | fat_change db 0 ; 1=fat has changed |
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105 | endg |
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106 | |||
107 | reserve_hd1: |
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108 | |||
109 | cli |
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110 | cmp [hd1_status],0 |
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111 | je reserve_ok1 |
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112 | |||
113 | sti |
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114 | call change_task |
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115 | jmp reserve_hd1 |
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116 | |||
117 | reserve_ok1: |
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118 | |||
119 | push eax |
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379 | serge | 120 | mov eax,[CURRENT_TASK] |
1 | ha | 121 | shl eax,5 |
379 | serge | 122 | mov eax,[eax+CURRENT_TASK+TASKDATA.pid] |
1 | ha | 123 | mov [hd1_status],eax |
124 | pop eax |
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125 | sti |
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126 | ret |
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95 | mario79 | 127 | ;******************************************** |
321 | diamond | 128 | |
129 | uglobal |
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130 | hd_in_cache db ? |
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131 | endg |
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132 | |||
95 | mario79 | 133 | reserve_hd_channel: |
134 | cmp [hdbase], 0x1F0 |
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135 | jne .IDE_Channel_2 |
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136 | .IDE_Channel_1: |
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137 | cli |
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138 | cmp [IDE_Channel_1],0 |
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139 | je .reserve_ok_1 |
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140 | sti |
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141 | call change_task |
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142 | jmp .IDE_Channel_1 |
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143 | .IDE_Channel_2: |
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144 | cli |
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145 | cmp [IDE_Channel_2],0 |
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146 | je .reserve_ok_2 |
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147 | sti |
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148 | call change_task |
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321 | diamond | 149 | jmp .IDE_Channel_2 |
95 | mario79 | 150 | .reserve_ok_1: |
321 | diamond | 151 | mov [IDE_Channel_1], 1 |
152 | push eax |
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153 | mov al, 1 |
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154 | jmp @f |
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95 | mario79 | 155 | .reserve_ok_2: |
321 | diamond | 156 | mov [IDE_Channel_2], 1 |
157 | push eax |
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158 | mov al, 3 |
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159 | @@: |
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160 | cmp [hdid], 1 |
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161 | sbb al, -1 |
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162 | cmp al, [hd_in_cache] |
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163 | jz @f |
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164 | mov [hd_in_cache], al |
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165 | call clear_hd_cache |
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166 | @@: |
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167 | pop eax |
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168 | ret |
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169 | |||
95 | mario79 | 170 | free_hd_channel: |
171 | cmp [hdbase], 0x1F0 |
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172 | jne .IDE_Channel_2 |
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173 | .IDE_Channel_1: |
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174 | mov [IDE_Channel_1],0 |
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175 | ret |
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176 | .IDE_Channel_2: |
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177 | mov [IDE_Channel_2],0 |
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178 | ret |
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179 | ;******************************************** |
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379 | serge | 180 | problem_partition db 0 ; used for partitions search |
1 | ha | 181 | |
65 | mario79 | 182 | include 'part_set.inc' |
1 | ha | 183 | |
184 | set_FAT: |
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185 | ;-------------------------------- |
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186 | ; input : EAX = cluster |
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187 | ; EDX = value to save |
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188 | ; output : EDX = old value |
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189 | ;-------------------------------- |
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190 | push eax ebx esi |
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191 | |||
192 | cmp eax,2 |
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193 | jb sfc_error |
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194 | cmp eax,[LAST_CLUSTER] |
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195 | ja sfc_error |
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256 | diamond | 196 | cmp [fs_type],16 |
1 | ha | 197 | je sfc_1 |
198 | add eax,eax |
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199 | sfc_1: |
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200 | add eax,eax |
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201 | mov esi,511 |
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202 | and esi,eax ; esi = position in fat sector |
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203 | shr eax,9 ; eax = fat sector |
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204 | add eax,[FAT_START] |
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205 | mov ebx,fat_cache |
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206 | |||
207 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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208 | je sfc_in_cache ; yes |
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209 | |||
210 | cmp [fat_change],0 ; is fat changed? |
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211 | je sfc_no_change ; no |
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212 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 213 | cmp [hd_error],0 |
214 | jne sfc_error |
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1 | ha | 215 | |
216 | sfc_no_change: |
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217 | mov [fat_in_cache],eax ; save fat sector |
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218 | call hd_read |
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74 | mario79 | 219 | cmp [hd_error],0 |
220 | jne sfc_error |
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1 | ha | 221 | |
379 | serge | 222 | |
1 | ha | 223 | sfc_in_cache: |
256 | diamond | 224 | cmp [fs_type],16 |
1 | ha | 225 | jne sfc_test32 |
226 | |||
227 | sfc_set16: |
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228 | xchg [ebx+esi],dx ; save new value and get old value |
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229 | jmp sfc_write |
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230 | |||
231 | sfc_test32: |
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232 | mov eax,[fatMASK] |
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233 | |||
234 | sfc_set32: |
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235 | and edx,eax |
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236 | xor eax,-1 ; mask for high bits |
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237 | and eax,[ebx+esi] ; get high 4 bits |
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238 | or eax,edx |
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239 | mov edx,[ebx+esi] ; get old value |
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240 | mov [ebx+esi],eax ; save new value |
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241 | |||
242 | sfc_write: |
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243 | mov [fat_change],1 ; fat has changed |
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244 | |||
245 | sfc_nonzero: |
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246 | and edx,[fatMASK] |
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247 | |||
248 | sfc_error: |
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249 | pop esi ebx eax |
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250 | ret |
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251 | |||
252 | |||
253 | get_FAT: |
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254 | ;-------------------------------- |
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255 | ; input : EAX = cluster |
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256 | ; output : EAX = next cluster |
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257 | ;-------------------------------- |
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258 | push ebx esi |
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259 | |||
256 | diamond | 260 | cmp [fs_type],16 |
1 | ha | 261 | je gfc_1 |
262 | add eax,eax |
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263 | gfc_1: |
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264 | add eax,eax |
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265 | mov esi,511 |
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266 | and esi,eax ; esi = position in fat sector |
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267 | shr eax,9 ; eax = fat sector |
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268 | add eax,[FAT_START] |
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269 | mov ebx,fat_cache |
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270 | |||
271 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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272 | je gfc_in_cache |
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273 | |||
274 | cmp [fat_change],0 ; is fat changed? |
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275 | je gfc_no_change ; no |
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276 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 277 | cmp [hd_error],0 |
278 | jne hd_error_01 |
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1 | ha | 279 | |
280 | gfc_no_change: |
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281 | mov [fat_in_cache],eax |
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282 | call hd_read |
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74 | mario79 | 283 | cmp [hd_error],0 |
284 | jne hd_error_01 |
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1 | ha | 285 | |
286 | gfc_in_cache: |
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287 | mov eax,[ebx+esi] |
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288 | and eax,[fatMASK] |
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74 | mario79 | 289 | hd_error_01: |
1 | ha | 290 | pop esi ebx |
291 | ret |
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292 | |||
293 | |||
294 | get_free_FAT: |
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295 | ;----------------------------------------------------------- |
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296 | ; input : EAX = # cluster for start the searching |
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297 | ; output : if CARRY=0 EAX = # first cluster found free |
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298 | ; if CARRY=1 disk full |
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299 | ; Note : for more speed need to use fat_cache directly |
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300 | ;----------------------------------------------------------- |
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301 | push ecx |
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302 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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303 | sub ecx,2 |
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304 | |||
305 | gff_test: |
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306 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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307 | jbe gff_in_range |
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308 | mov eax,2 |
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309 | |||
310 | gff_in_range: |
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311 | push eax |
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312 | call get_FAT ; get cluster state |
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74 | mario79 | 313 | cmp [hd_error],0 |
314 | jne gff_not_found_1 |
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315 | |||
1 | ha | 316 | test eax,eax ; is it free? |
317 | pop eax |
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318 | je gff_found ; yes |
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319 | inc eax ; next cluster |
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320 | dec ecx ; is all checked? |
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321 | jns gff_test ; no |
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322 | |||
74 | mario79 | 323 | gff_not_found_1: |
324 | add esp,4 |
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1 | ha | 325 | gff_not_found: |
326 | pop ecx ; yes. disk is full |
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327 | stc |
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328 | ret |
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329 | |||
330 | gff_found: |
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331 | pop ecx |
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332 | clc |
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333 | ret |
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334 | |||
335 | |||
336 | write_fat_sector: |
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337 | ;----------------------------------------------------------- |
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338 | ; write changed fat to disk |
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339 | ;----------------------------------------------------------- |
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340 | push eax ebx ecx |
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341 | |||
342 | mov [fat_change],0 |
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343 | mov eax,[fat_in_cache] |
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344 | cmp eax,-1 |
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345 | jz write_fat_not_used |
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346 | mov ebx,fat_cache |
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347 | mov ecx,[NUMBER_OF_FATS] |
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348 | |||
349 | write_next_fat: |
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350 | call hd_write |
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74 | mario79 | 351 | cmp [hd_error],0 |
352 | jne write_fat_not_used |
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353 | |||
1 | ha | 354 | add eax,[SECTORS_PER_FAT] |
355 | dec ecx |
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356 | jnz write_next_fat |
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357 | |||
358 | write_fat_not_used: |
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359 | pop ecx ebx eax |
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360 | ret |
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361 | |||
362 | |||
363 | analyze_directory: |
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364 | ;----------------------------------------------------------- |
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365 | ; input : EAX = first cluster of the directory |
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366 | ; EBX = pointer to filename |
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367 | ; output : IF CARRY=0 EAX = sector where th file is found |
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368 | ; EBX = pointer in buffer |
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369 | ; [buffer .. buffer+511] |
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370 | ; ECX,EDX,ESI,EDI not changed |
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371 | ; IF CARRY=1 filename not found |
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372 | ; Note : if cluster=0 it's changed to read rootdir |
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373 | ; save 2 previous directory sectors in longname_sec |
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374 | ;----------------------------------------------------------- |
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375 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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376 | mov [longname_sec1],0 |
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377 | mov [longname_sec2],0 |
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378 | |||
379 | adr_new_cluster: |
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380 | mov [cluster_tmp],eax |
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381 | mov [fat16_root],0 |
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382 | cmp eax,[LAST_CLUSTER] |
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383 | ja adr_not_found ; too big cluster number, something is wrong |
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384 | cmp eax,2 |
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385 | jnb adr_data_cluster |
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386 | |||
387 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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256 | diamond | 388 | cmp [fs_type],16 |
1 | ha | 389 | jne adr_data_cluster |
390 | mov eax,[ROOT_START] |
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391 | mov edx,[ROOT_SECTORS] |
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392 | mov [fat16_root],1 ; flag for fat16 rootdir |
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393 | jmp adr_new_sector |
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394 | |||
395 | adr_data_cluster: |
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396 | sub eax,2 |
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397 | mov edx,[SECTORS_PER_CLUSTER] |
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398 | imul eax,edx |
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399 | add eax,[DATA_START] |
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400 | |||
401 | adr_new_sector: |
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402 | mov ebx,buffer |
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403 | call hd_read |
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74 | mario79 | 404 | cmp [hd_error],0 |
405 | jne adr_not_found |
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406 | |||
1 | ha | 407 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
408 | |||
409 | adr_analyze: |
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410 | mov edi,[ebx+11] ; file attribute |
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411 | and edi,0xf |
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412 | cmp edi,0xf |
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413 | je adr_long_filename |
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414 | test edi,0x8 ; skip over volume label |
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415 | jne adr_long_filename ; Note: label can be same name as file/dir |
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416 | |||
417 | mov esi,[esp+0] ; filename need to be uppercase |
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418 | mov edi,ebx |
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419 | push ecx |
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420 | mov ecx,11 |
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421 | cld |
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422 | rep cmpsb ; compare 8+3 filename |
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423 | pop ecx |
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424 | je adr_found |
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425 | |||
426 | adr_long_filename: |
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427 | add ebx,32 ; position of next dir entry |
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428 | dec ecx |
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429 | jnz adr_analyze |
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430 | |||
431 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
||
432 | mov [longname_sec1],eax ; for delete long filename |
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433 | mov [longname_sec2],ecx |
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434 | inc eax ; next sector |
||
435 | dec edx |
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436 | jne adr_new_sector |
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437 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
438 | je adr_not_found |
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439 | |||
440 | adr_next_cluster: |
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441 | mov eax,[cluster_tmp] |
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442 | call get_FAT ; get next cluster |
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74 | mario79 | 443 | cmp [hd_error],0 |
444 | jne adr_not_found |
||
445 | |||
1 | ha | 446 | cmp eax,2 ; incorrect fat chain? |
447 | jb adr_not_found ; yes |
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448 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
449 | jb adr_new_cluster ; no. analyse it |
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450 | |||
451 | adr_not_found: |
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452 | pop edi edi esi edx ecx ; first edi will remove ebx |
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453 | stc ; file not found |
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454 | ret |
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455 | |||
456 | adr_found: |
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457 | pop edi edi esi edx ecx ; first edi will remove ebx |
||
458 | clc ; file found |
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459 | ret |
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460 | |||
461 | |||
462 | get_data_cluster: |
||
463 | ;----------------------------------------------------------- |
||
464 | ; input : EAX = cluster |
||
465 | ; EBX = pointer to buffer |
||
466 | ; EDX = # blocks to read in buffer |
||
467 | ; ESI = # blocks to skip over |
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468 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
469 | ; if CARRY=1 cluster out of range |
||
470 | ; Note : if cluster=0 it's changed to read rootdir |
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471 | ;----------------------------------------------------------- |
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472 | push eax ecx |
||
473 | |||
474 | mov [fat16_root],0 |
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475 | cmp eax,[LAST_CLUSTER] |
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476 | ja gdc_error ; too big cluster number, something is wrong |
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477 | cmp eax,2 |
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478 | jnb gdc_cluster |
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479 | |||
480 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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256 | diamond | 481 | cmp [fs_type],16 |
1 | ha | 482 | jne gdc_cluster |
483 | mov eax,[ROOT_START] |
||
484 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
485 | mov [fat16_root],1 ; flag for fat16 rootdir |
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486 | jmp gdc_read |
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487 | |||
488 | gdc_cluster: |
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489 | sub eax,2 |
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490 | mov ecx,[SECTORS_PER_CLUSTER] |
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491 | imul eax,ecx |
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492 | add eax,[DATA_START] |
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493 | |||
494 | gdc_read: |
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495 | test esi,esi ; first wanted block |
||
496 | je gdcl1 ; yes, skip count is 0 |
||
497 | dec esi |
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498 | jmp gdcl2 |
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499 | |||
500 | gdcl1: |
||
501 | call hd_read |
||
74 | mario79 | 502 | cmp [hd_error],0 |
379 | serge | 503 | jne gdc_error |
74 | mario79 | 504 | |
1 | ha | 505 | add ebx,512 ; update pointer |
506 | dec edx |
||
507 | |||
508 | gdcl2: |
||
509 | test edx,edx ; is all read? |
||
510 | je out_of_read |
||
511 | |||
512 | inc eax ; next sector |
||
513 | dec ecx |
||
514 | jnz gdc_read |
||
515 | |||
516 | out_of_read: |
||
517 | pop ecx eax |
||
518 | clc |
||
519 | ret |
||
520 | |||
521 | gdc_error: |
||
522 | pop ecx eax |
||
523 | stc |
||
524 | ret |
||
525 | |||
526 | |||
527 | get_cluster_of_a_path: |
||
528 | ;--------------------------------------------------------- |
||
529 | ; input : EBX = pointer to a path string |
||
530 | ; (example: the path "/files/data/document" become |
||
531 | ; "files......data.......document...0" |
||
532 | ; '.' = space char |
||
533 | ; '0' = char(0) (ASCII=0) !!! ) |
||
534 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
535 | ; if (CARRY=0) -> EAX=cluster |
||
536 | ;--------------------------------------------------------- |
||
537 | push ebx edx |
||
538 | |||
539 | mov eax,[ROOT_CLUSTER] |
||
540 | mov edx,ebx |
||
541 | |||
542 | search_end_of_path: |
||
543 | cmp byte [edx],0 |
||
544 | je found_end_of_path |
||
545 | |||
546 | inc edx ; '/' |
||
547 | mov ebx,edx |
||
548 | call analyze_directory |
||
549 | jc directory_not_found |
||
550 | |||
551 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
552 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
553 | and eax,[fatMASK] |
||
554 | add edx,11 ; 8+3 (name+extension) |
||
555 | jmp search_end_of_path |
||
556 | |||
557 | found_end_of_path: |
||
558 | pop edx ebx |
||
559 | clc ; no errors |
||
560 | ret |
||
561 | |||
562 | directory_not_found: |
||
563 | pop edx ebx |
||
564 | stc ; errors occour |
||
565 | ret |
||
566 | |||
567 | |||
568 | bcd2bin: |
||
569 | ;---------------------------------- |
||
570 | ; input : AL=BCD number (eg. 0x11) |
||
571 | ; output : AH=0 |
||
572 | ; AL=decimal number (eg. 11) |
||
573 | ;---------------------------------- |
||
574 | xor ah,ah |
||
575 | shl ax,4 |
||
576 | shr al,4 |
||
577 | aad |
||
578 | ret |
||
579 | |||
580 | |||
581 | get_date_for_file: |
||
582 | ;----------------------------------------------------- |
||
583 | ; Get date from CMOS and pack day,month,year in AX |
||
584 | ; DATE bits 0..4 : day of month 0..31 |
||
585 | ; 5..8 : month of year 1..12 |
||
586 | ; 9..15 : count of years from 1980 |
||
587 | ;----------------------------------------------------- |
||
588 | mov al,0x7 ;day |
||
589 | out 0x70,al |
||
590 | in al,0x71 |
||
591 | call bcd2bin |
||
592 | ror eax,5 |
||
593 | |||
594 | mov al,0x8 ;month |
||
595 | out 0x70,al |
||
596 | in al,0x71 |
||
597 | call bcd2bin |
||
598 | ror eax,4 |
||
599 | |||
600 | mov al,0x9 ;year |
||
601 | out 0x70,al |
||
602 | in al,0x71 |
||
603 | call bcd2bin |
||
604 | add ax,20 ;because CMOS return only the two last |
||
605 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
606 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
607 | ret |
||
608 | |||
609 | |||
610 | get_time_for_file: |
||
611 | ;----------------------------------------------------- |
||
612 | ; Get time from CMOS and pack hour,minute,second in AX |
||
613 | ; TIME bits 0..4 : second (the low bit is lost) |
||
614 | ; 5..10 : minute 0..59 |
||
615 | ; 11..15 : hour 0..23 |
||
616 | ;----------------------------------------------------- |
||
617 | mov al,0x0 ;second |
||
618 | out 0x70,al |
||
619 | in al,0x71 |
||
620 | call bcd2bin |
||
621 | ror eax,6 |
||
622 | |||
623 | mov al,0x2 ;minute |
||
624 | out 0x70,al |
||
625 | in al,0x71 |
||
626 | call bcd2bin |
||
627 | ror eax,6 |
||
628 | |||
629 | mov al,0x4 ;hour |
||
630 | out 0x70,al |
||
631 | in al,0x71 |
||
632 | call bcd2bin |
||
633 | rol eax,11 |
||
634 | ret |
||
635 | |||
636 | |||
637 | set_current_time_for_entry: |
||
638 | ;----------------------------------------------------- |
||
639 | ; Set current time/date for file entry |
||
640 | ; input : ebx = file entry pointer |
||
641 | ;----------------------------------------------------- |
||
642 | push eax |
||
643 | call get_time_for_file ; update files date/time |
||
644 | mov [ebx+22],ax |
||
645 | call get_date_for_file |
||
646 | mov [ebx+24],ax |
||
647 | pop eax |
||
648 | ret |
||
649 | |||
650 | |||
651 | |||
652 | add_disk_free_space: |
||
653 | ;----------------------------------------------------- |
||
654 | ; input : ecx = cluster count |
||
655 | ; Note : negative = remove clusters from free space |
||
656 | ; positive = add clusters to free space |
||
657 | ;----------------------------------------------------- |
||
658 | test ecx,ecx ; no change |
||
659 | je add_dfs_no |
||
256 | diamond | 660 | cmp [fs_type],32 ; free disk space only used by fat32 |
1 | ha | 661 | jne add_dfs_no |
662 | |||
663 | push eax ebx |
||
664 | mov eax,[ADR_FSINFO] |
||
133 | diamond | 665 | mov ebx,fsinfo_buffer |
1 | ha | 666 | call hd_read |
74 | mario79 | 667 | cmp [hd_error],0 |
668 | jne add_not_fs |
||
669 | |||
1 | ha | 670 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
671 | jne add_not_fs |
||
672 | |||
673 | add [ebx+0x1e8],ecx |
||
674 | call hd_write |
||
133 | diamond | 675 | ; cmp [hd_error],0 |
676 | ; jne add_not_fs |
||
1 | ha | 677 | |
678 | add_not_fs: |
||
679 | pop ebx eax |
||
680 | |||
681 | add_dfs_no: |
||
682 | ret |
||
683 | |||
684 | |||
685 | file_read: |
||
686 | ;-------------------------------------------------------------------------- |
||
687 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
688 | ; |
||
689 | ; EAX EDI system call to write / |
||
690 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
691 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
692 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
693 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
694 | ; EDI ESI vt first 512 block to read |
||
695 | ; EDI if 0 - read root |
||
696 | ; |
||
697 | ; output : eax = 0 - ok |
||
698 | ; 3 - unknown FS |
||
699 | ; 5 - file not found |
||
700 | ; 6 - end of file |
||
701 | ; 9 - fat table corrupted |
||
74 | mario79 | 702 | ; 10 - access denied |
1 | ha | 703 | ; ebx = size of file/directory |
704 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 705 | cmp [fs_type], 16 |
706 | jz fat_ok_for_reading |
||
707 | cmp [fs_type], 32 |
||
708 | jz fat_ok_for_reading |
||
1 | ha | 709 | xor ebx,ebx |
710 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 711 | mov [hd1_status], ebx |
1 | ha | 712 | ret |
713 | |||
714 | fat_ok_for_reading: |
||
715 | ; call reserve_hd1 |
||
716 | |||
717 | pushad |
||
718 | |||
719 | mov ebx,edx |
||
720 | call get_cluster_of_a_path |
||
721 | jc file_to_read_not_found |
||
722 | |||
723 | test edi,edi ; read rootdir |
||
724 | jne no_read_root |
||
725 | |||
726 | xor eax,eax |
||
727 | call get_dir_size ; return rootdir size |
||
74 | mario79 | 728 | cmp [hd_error],0 |
729 | jne file_access_denied |
||
730 | |||
1 | ha | 731 | mov [file_size],eax |
732 | mov eax,[ROOT_CLUSTER] |
||
733 | jmp file_read_start |
||
734 | |||
735 | no_read_root: |
||
736 | mov ebx,PUSHAD_EAX ; file name |
||
737 | call analyze_directory |
||
738 | jc file_to_read_not_found |
||
739 | |||
740 | mov eax,[ebx+28] ; file size |
||
741 | test byte [ebx+11],0x10 ; is it directory? |
||
742 | jz read_set_size ; no |
||
743 | |||
744 | mov eax,[ebx+20-2] ; FAT entry |
||
745 | mov ax,[ebx+26] |
||
746 | and eax,[fatMASK] |
||
747 | call get_dir_size |
||
74 | mario79 | 748 | cmp [hd_error],0 |
749 | jne file_access_denied |
||
1 | ha | 750 | |
751 | read_set_size: |
||
752 | mov [file_size],eax |
||
753 | |||
754 | mov eax,[ebx+20-2] ; FAT entry |
||
755 | mov ax,[ebx+26] |
||
756 | and eax,[fatMASK] |
||
757 | |||
758 | file_read_start: |
||
759 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
760 | mov edx,PUSHAD_EBX ; file blocks to read |
||
761 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
762 | |||
763 | file_read_new_cluster: |
||
764 | call get_data_cluster |
||
765 | jc file_read_eof ; end of file or cluster out of range |
||
766 | |||
767 | test edx,edx ; is all read? |
||
768 | je file_read_OK ; yes |
||
769 | |||
770 | call get_FAT ; get next cluster |
||
74 | mario79 | 771 | cmp [hd_error],0 |
772 | jne file_access_denied |
||
773 | |||
1 | ha | 774 | cmp eax,[fatRESERVED] ; end of file |
775 | jnb file_read_eof |
||
776 | cmp eax,2 ; incorrect fat chain |
||
777 | jnb file_read_new_cluster |
||
778 | |||
779 | popad |
||
780 | mov [hd1_status],0 |
||
781 | mov ebx,[file_size] |
||
782 | mov eax,ERROR_FAT_TABLE |
||
783 | ret |
||
784 | |||
785 | file_read_eof: |
||
74 | mario79 | 786 | cmp [hd_error],0 |
787 | jne file_access_denied |
||
1 | ha | 788 | popad |
789 | mov [hd1_status],0 |
||
790 | mov ebx,[file_size] |
||
791 | mov eax,ERROR_END_OF_FILE |
||
792 | ret |
||
793 | |||
794 | file_read_OK: |
||
795 | popad |
||
796 | mov [hd1_status],0 |
||
797 | mov ebx,[file_size] |
||
798 | xor eax,eax |
||
799 | ret |
||
800 | |||
801 | file_to_read_not_found: |
||
74 | mario79 | 802 | cmp [hd_error],0 |
803 | jne file_access_denied |
||
1 | ha | 804 | popad |
805 | mov [hd1_status],0 |
||
806 | xor ebx,ebx |
||
807 | mov eax,ERROR_FILE_NOT_FOUND |
||
808 | ret |
||
809 | |||
74 | mario79 | 810 | file_access_denied: |
811 | popad |
||
812 | mov [hd1_status],0 |
||
813 | xor ebx,ebx |
||
814 | mov eax,ERROR_ACCESS_DENIED |
||
815 | ret |
||
1 | ha | 816 | |
817 | get_dir_size: |
||
818 | ;----------------------------------------------------- |
||
819 | ; input : eax = first cluster (0=rootdir) |
||
820 | ; output : eax = directory size in bytes |
||
821 | ;----------------------------------------------------- |
||
822 | push edx |
||
823 | xor edx,edx ; count of directory clusters |
||
824 | test eax,eax |
||
825 | jnz dir_size_next |
||
826 | |||
827 | mov eax,[ROOT_SECTORS] |
||
828 | shl eax,9 ; fat16 rootdir size in bytes |
||
256 | diamond | 829 | cmp [fs_type],16 |
1 | ha | 830 | je dir_size_ret |
831 | mov eax,[ROOT_CLUSTER] |
||
832 | |||
833 | dir_size_next: |
||
834 | cmp eax,2 ; incorrect fat chain |
||
835 | jb dir_size_end |
||
836 | cmp eax,[fatRESERVED] ; end of directory |
||
837 | ja dir_size_end |
||
838 | call get_FAT ; get next cluster |
||
74 | mario79 | 839 | cmp [hd_error],0 |
840 | jne dir_size_ret |
||
841 | |||
1 | ha | 842 | inc edx |
843 | jmp dir_size_next |
||
844 | |||
845 | dir_size_end: |
||
846 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
847 | imul eax,edx |
||
848 | |||
849 | dir_size_ret: |
||
850 | pop edx |
||
851 | ret |
||
852 | |||
853 | |||
854 | clear_cluster_chain: |
||
855 | ;----------------------------------------------------- |
||
856 | ; input : eax = first cluster |
||
857 | ;----------------------------------------------------- |
||
858 | push eax ecx edx |
||
859 | xor ecx,ecx ; cluster count |
||
860 | |||
861 | clean_new_chain: |
||
862 | cmp eax,[LAST_CLUSTER] ; end of file |
||
863 | ja delete_OK |
||
864 | cmp eax,2 ; unfinished fat chain or zero length file |
||
865 | jb delete_OK |
||
866 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
867 | jz delete_OK |
||
868 | |||
869 | xor edx,edx |
||
870 | call set_FAT ; clear fat entry |
||
74 | mario79 | 871 | cmp [hd_error],0 |
872 | jne access_denied_01 |
||
873 | |||
1 | ha | 874 | inc ecx ; update cluster count |
875 | mov eax,edx ; old cluster |
||
876 | jmp clean_new_chain |
||
877 | |||
878 | delete_OK: |
||
879 | call add_disk_free_space ; add clusters to free disk space |
||
74 | mario79 | 880 | access_denied_01: |
1 | ha | 881 | pop edx ecx eax |
882 | ret |
||
883 | |||
884 | |||
885 | get_hd_info: |
||
886 | ;----------------------------------------------------------- |
||
887 | ; output : eax = 0 - ok |
||
888 | ; 3 - unknown FS |
||
74 | mario79 | 889 | ; 10 - access denied |
1 | ha | 890 | ; edx = cluster size in bytes |
891 | ; ebx = total clusters on disk |
||
892 | ; ecx = free clusters on disk |
||
893 | ;----------------------------------------------------------- |
||
256 | diamond | 894 | cmp [fs_type], 16 |
895 | jz info_fat_ok |
||
896 | cmp [fs_type], 32 |
||
897 | jz info_fat_ok |
||
1 | ha | 898 | xor edx,edx |
899 | xor ebx,ebx |
||
900 | xor ecx,ecx |
||
901 | mov eax,ERROR_UNKNOWN_FS |
||
902 | ret |
||
903 | |||
904 | info_fat_ok: |
||
905 | ; call reserve_hd1 |
||
906 | |||
907 | xor ecx,ecx ; count of free clusters |
||
908 | mov eax,2 |
||
909 | mov ebx,[LAST_CLUSTER] |
||
910 | |||
911 | info_cluster: |
||
912 | push eax |
||
913 | call get_FAT ; get cluster info |
||
74 | mario79 | 914 | cmp [hd_error],0 |
915 | jne info_access_denied |
||
916 | |||
1 | ha | 917 | test eax,eax ; is it free? |
918 | jnz info_used ; no |
||
919 | inc ecx |
||
920 | |||
921 | info_used: |
||
922 | pop eax |
||
923 | inc eax |
||
924 | cmp eax,ebx ; is above last cluster? |
||
925 | jbe info_cluster ; no. test next cluster |
||
926 | |||
927 | dec ebx ; cluster count |
||
928 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
929 | mov [hd1_status],0 |
||
930 | xor eax,eax |
||
931 | ret |
||
932 | |||
74 | mario79 | 933 | info_access_denied: |
379 | serge | 934 | add esp,4 |
74 | mario79 | 935 | xor edx,edx |
936 | xor ebx,ebx |
||
937 | xor ecx,ecx |
||
938 | mov eax,ERROR_ACCESS_DENIED |
||
939 | ret |
||
1 | ha | 940 | |
941 | update_disk: |
||
942 | ;----------------------------------------------------------- |
||
943 | ; write changed fat and cache to disk |
||
944 | ;----------------------------------------------------------- |
||
945 | cmp [fat_change],0 ; is fat changed? |
||
946 | je upd_no_change |
||
947 | |||
948 | call write_fat_sector |
||
74 | mario79 | 949 | cmp [hd_error],0 |
950 | jne update_disk_acces_denied |
||
1 | ha | 951 | |
952 | upd_no_change: |
||
953 | |||
954 | call write_cache |
||
74 | mario79 | 955 | update_disk_acces_denied: |
1 | ha | 956 | ret |
957 | |||
958 | |||
71 | diamond | 959 | ; \begin{diamond} |
960 | hd_find_lfn: |
||
521 | diamond | 961 | ; in: esi+ebp -> name |
71 | diamond | 962 | ; out: CF=1 - file not found |
86 | diamond | 963 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 964 | ; destroys eax |
965 | push esi edi |
||
966 | push 0 |
||
967 | push 0 |
||
968 | push fat16_root_first |
||
969 | push fat16_root_next |
||
970 | mov eax, [ROOT_CLUSTER] |
||
256 | diamond | 971 | cmp [fs_type], 32 |
83 | diamond | 972 | jz .fat32 |
973 | .loop: |
||
974 | call fat_find_lfn |
||
975 | jc .notfound |
||
976 | cmp byte [esi], 0 |
||
977 | jz .found |
||
521 | diamond | 978 | .continue: |
83 | diamond | 979 | test byte [edi+11], 10h |
980 | jz .notfound |
||
981 | and dword [esp+12], 0 |
||
88 | diamond | 982 | mov eax, [edi+20-2] |
983 | mov ax, [edi+26] ; cluster |
||
83 | diamond | 984 | .fat32: |
985 | mov [esp+8], eax |
||
986 | mov dword [esp+4], fat_notroot_first |
||
987 | mov dword [esp], fat_notroot_next |
||
988 | jmp .loop |
||
71 | diamond | 989 | .notfound: |
83 | diamond | 990 | add esp, 16 |
991 | pop edi esi |
||
992 | stc |
||
993 | ret |
||
71 | diamond | 994 | .found: |
521 | diamond | 995 | test ebp, ebp |
996 | jz @f |
||
997 | mov esi, ebp |
||
998 | xor ebp, ebp |
||
999 | jmp .continue |
||
1000 | @@: |
||
86 | diamond | 1001 | lea eax, [esp+8] |
1002 | cmp dword [eax], 0 |
||
1003 | jz .root |
||
1004 | call fat_get_sector |
||
1005 | jmp .cmn |
||
1006 | .root: |
||
1007 | mov eax, [eax+4] |
||
1008 | add eax, [ROOT_START] |
||
1009 | .cmn: |
||
83 | diamond | 1010 | add esp, 20 ; CF=0 |
1011 | pop esi |
||
1012 | ret |
||
74 | mario79 | 1013 | |
71 | diamond | 1014 | ;---------------------------------------------------------------- |
1015 | ; |
||
1016 | ; fs_HdRead - LFN variant for reading hard disk |
||
1017 | ; |
||
1018 | ; esi points to filename |
||
1019 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1020 | ; may be ebx=0 - start from first byte |
||
1021 | ; ecx number of bytes to read, 0+ |
||
1022 | ; edx mem location to return data |
||
1023 | ; |
||
77 | diamond | 1024 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 1025 | ; eax = 0 ok read or other = errormsg |
1026 | ; |
||
1027 | ;-------------------------------------------------------------- |
||
1028 | fs_HdRead: |
||
256 | diamond | 1029 | cmp [fs_type], 16 |
1030 | jz @f |
||
1031 | cmp [fs_type], 32 |
||
1032 | jz @f |
||
1033 | cmp [fs_type], 1 |
||
1034 | jz ntfs_HdRead |
||
1035 | or ebx, -1 |
||
1036 | mov eax, ERROR_UNKNOWN_FS |
||
1037 | ret |
||
71 | diamond | 1038 | @@: |
74 | mario79 | 1039 | push edi |
1040 | cmp byte [esi], 0 |
||
1041 | jnz @f |
||
71 | diamond | 1042 | .noaccess: |
74 | mario79 | 1043 | pop edi |
1044 | .noaccess_2: |
||
1045 | or ebx, -1 |
||
1046 | mov eax, ERROR_ACCESS_DENIED |
||
1047 | ret |
||
379 | serge | 1048 | |
74 | mario79 | 1049 | .noaccess_3: |
1050 | add esp,4 |
||
1051 | .noaccess_1: |
||
1052 | add esp,4 |
||
1053 | .noaccess_4: |
||
1054 | add esp,4*5 |
||
1055 | jmp .noaccess_2 |
||
1056 | |||
71 | diamond | 1057 | @@: |
74 | mario79 | 1058 | call hd_find_lfn |
1059 | jnc .found |
||
1060 | pop edi |
||
1061 | cmp [hd_error],0 |
||
1062 | jne .noaccess_2 |
||
1063 | or ebx, -1 |
||
1064 | mov eax, ERROR_FILE_NOT_FOUND |
||
1065 | ret |
||
1066 | |||
71 | diamond | 1067 | .found: |
74 | mario79 | 1068 | test byte [edi+11], 0x10 ; do not allow read directories |
1069 | jnz .noaccess |
||
1070 | test ebx, ebx |
||
1071 | jz .l1 |
||
1072 | cmp dword [ebx+4], 0 |
||
1073 | jz @f |
||
77 | diamond | 1074 | xor ebx, ebx |
71 | diamond | 1075 | .reteof: |
74 | mario79 | 1076 | mov eax, 6 |
1077 | pop edi |
||
1078 | ret |
||
71 | diamond | 1079 | @@: |
74 | mario79 | 1080 | mov ebx, [ebx] |
71 | diamond | 1081 | .l1: |
77 | diamond | 1082 | push ecx edx |
1083 | push 0 |
||
1084 | mov eax, [edi+28] |
||
1085 | sub eax, ebx |
||
1086 | jb .eof |
||
1087 | cmp eax, ecx |
||
1088 | jae @f |
||
1089 | mov ecx, eax |
||
1090 | mov byte [esp], 6 |
||
1091 | @@: |
||
74 | mario79 | 1092 | mov eax, [edi+20-2] |
1093 | mov ax, [edi+26] |
||
71 | diamond | 1094 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1095 | .new_cluster: |
||
74 | mario79 | 1096 | jecxz .new_sector |
1097 | test eax, eax |
||
1098 | jz .eof |
||
1099 | cmp eax, [fatRESERVED] |
||
1100 | jae .eof |
||
1101 | mov [cluster_tmp], eax |
||
1102 | dec eax |
||
1103 | dec eax |
||
1104 | mov edi, [SECTORS_PER_CLUSTER] |
||
1105 | imul eax, edi |
||
1106 | add eax, [DATA_START] |
||
71 | diamond | 1107 | .new_sector: |
74 | mario79 | 1108 | test ecx, ecx |
1109 | jz .done |
||
1110 | sub ebx, 512 |
||
1111 | jae .skip |
||
1112 | add ebx, 512 |
||
1113 | jnz .force_buf |
||
1114 | cmp ecx, 512 |
||
1115 | jb .force_buf |
||
71 | diamond | 1116 | ; we may read directly to given buffer |
74 | mario79 | 1117 | push ebx |
1118 | mov ebx, edx |
||
1119 | call hd_read |
||
1120 | cmp [hd_error],0 |
||
379 | serge | 1121 | jne .noaccess_1 |
74 | mario79 | 1122 | pop ebx |
1123 | add edx, 512 |
||
1124 | sub ecx, 512 |
||
1125 | jmp .skip |
||
71 | diamond | 1126 | .force_buf: |
1127 | ; we must read sector to temporary buffer and then copy it to destination |
||
74 | mario79 | 1128 | push eax ebx |
1129 | mov ebx, buffer |
||
1130 | call hd_read |
||
1131 | cmp [hd_error],0 |
||
1132 | jne .noaccess_3 |
||
1133 | |||
1134 | mov eax, ebx |
||
1135 | pop ebx |
||
1136 | add eax, ebx |
||
1137 | push ecx |
||
1138 | add ecx, ebx |
||
1139 | cmp ecx, 512 |
||
1140 | jbe @f |
||
1141 | mov ecx, 512 |
||
71 | diamond | 1142 | @@: |
74 | mario79 | 1143 | sub ecx, ebx |
1144 | mov ebx, edx |
||
1145 | call memmove |
||
1146 | add edx, ecx |
||
1147 | sub [esp], ecx |
||
1148 | pop ecx |
||
1149 | pop eax |
||
1150 | xor ebx, ebx |
||
71 | diamond | 1151 | .skip: |
74 | mario79 | 1152 | inc eax |
1153 | dec edi |
||
1154 | jnz .new_sector |
||
1155 | mov eax, [cluster_tmp] |
||
1156 | call get_FAT |
||
1157 | cmp [hd_error],0 |
||
1158 | jne .noaccess_4 |
||
1159 | |||
1160 | jmp .new_cluster |
||
71 | diamond | 1161 | .done: |
77 | diamond | 1162 | mov ebx, edx |
1163 | pop eax edx ecx edi |
||
1164 | sub ebx, edx |
||
1165 | ret |
||
71 | diamond | 1166 | .eof: |
77 | diamond | 1167 | mov ebx, edx |
1168 | pop eax edx ecx |
||
1169 | sub ebx, edx |
||
1170 | jmp .reteof |
||
75 | diamond | 1171 | |
1172 | ;---------------------------------------------------------------- |
||
1173 | ; |
||
1174 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
1175 | ; |
||
1176 | ; esi points to filename |
||
78 | diamond | 1177 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
1178 | ; & flags (bitfields) |
||
1179 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 1180 | ; ecx number of blocks to read, 0+ |
1181 | ; edx mem location to return data |
||
1182 | ; |
||
77 | diamond | 1183 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 1184 | ; eax = 0 ok read or other = errormsg |
1185 | ; |
||
1186 | ;-------------------------------------------------------------- |
||
1187 | fs_HdReadFolder: |
||
256 | diamond | 1188 | cmp [fs_type], 1 |
1189 | jz ntfs_HdReadFolder |
||
1190 | cmp [fs_type], 16 |
||
1191 | jz @f |
||
1192 | cmp [fs_type], 32 |
||
1193 | jz @f |
||
1194 | push ERROR_UNSUPPORTED_FS |
||
1195 | pop eax |
||
1196 | or ebx, -1 |
||
1197 | ret |
||
1198 | @@: |
||
75 | diamond | 1199 | mov eax, [ROOT_CLUSTER] |
1200 | push edi |
||
1201 | cmp byte [esi], 0 |
||
1202 | jz .doit |
||
1203 | call hd_find_lfn |
||
1204 | jnc .found |
||
1205 | pop edi |
||
1206 | or ebx, -1 |
||
1207 | mov eax, ERROR_FILE_NOT_FOUND |
||
1208 | ret |
||
1209 | .found: |
||
1210 | test byte [edi+11], 0x10 ; do not allow read files |
||
1211 | jnz .found_dir |
||
1212 | pop edi |
||
1213 | or ebx, -1 |
||
1214 | mov eax, ERROR_ACCESS_DENIED |
||
1215 | ret |
||
1216 | .found_dir: |
||
1217 | mov eax, [edi+20-2] |
||
1218 | mov ax, [edi+26] ; eax=cluster |
||
1219 | .doit: |
||
1220 | push esi ecx |
||
1221 | push ebp |
||
1222 | sub esp, 262*2 ; reserve space for LFN |
||
1223 | mov ebp, esp |
||
78 | diamond | 1224 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1225 | mov ebx, [ebx] |
||
75 | diamond | 1226 | ; init header |
1227 | push eax ecx |
||
1228 | mov edi, edx |
||
1229 | mov ecx, 32/4 |
||
1230 | xor eax, eax |
||
1231 | rep stosd |
||
1232 | pop ecx eax |
||
1233 | mov byte [edx], 1 ; version |
||
1234 | mov esi, edi ; esi points to BDFE |
||
1235 | .new_cluster: |
||
1236 | mov [cluster_tmp], eax |
||
1237 | test eax, eax |
||
1238 | jnz @f |
||
256 | diamond | 1239 | cmp [fs_type], 32 |
75 | diamond | 1240 | jz .notfound |
1241 | mov eax, [ROOT_START] |
||
1242 | push [ROOT_SECTORS] |
||
1243 | push ebx |
||
1244 | jmp .new_sector |
||
1245 | @@: |
||
1246 | dec eax |
||
1247 | dec eax |
||
1248 | imul eax, [SECTORS_PER_CLUSTER] |
||
1249 | push [SECTORS_PER_CLUSTER] |
||
1250 | add eax, [DATA_START] |
||
1251 | push ebx |
||
1252 | .new_sector: |
||
1253 | mov ebx, buffer |
||
1254 | mov edi, ebx |
||
1255 | call hd_read |
||
1256 | cmp [hd_error], 0 |
||
1257 | jnz .notfound2 |
||
1258 | add ebx, 512 |
||
1259 | push eax |
||
1260 | .l1: |
||
1261 | call fat_get_name |
||
1262 | jc .l2 |
||
1263 | cmp byte [edi+11], 0xF |
||
1264 | jnz .do_bdfe |
||
1265 | add edi, 0x20 |
||
1266 | cmp edi, ebx |
||
1267 | jb .do_bdfe |
||
1268 | pop eax |
||
1269 | inc eax |
||
1270 | dec dword [esp+4] |
||
1271 | jnz @f |
||
1272 | mov eax, [cluster_tmp] |
||
1273 | test eax, eax |
||
1274 | jz .done |
||
1275 | call get_FAT |
||
1276 | cmp [hd_error], 0 |
||
1277 | jnz .notfound2 |
||
1278 | cmp eax, 2 |
||
1279 | jb .done |
||
1280 | cmp eax, [fatRESERVED] |
||
1281 | jae .done |
||
1282 | push eax |
||
1283 | mov eax, [SECTORS_PER_CLUSTER] |
||
1284 | mov [esp+8], eax |
||
1285 | pop eax |
||
1286 | mov [cluster_tmp], eax |
||
1287 | dec eax |
||
1288 | dec eax |
||
1289 | imul eax, [SECTORS_PER_CLUSTER] |
||
1290 | add eax, [DATA_START] |
||
1291 | @@: |
||
1292 | mov ebx, buffer |
||
1293 | mov edi, ebx |
||
1294 | call hd_read |
||
1295 | cmp [hd_error], 0 |
||
1296 | jnz .notfound2 |
||
1297 | add ebx, 512 |
||
1298 | push eax |
||
1299 | .do_bdfe: |
||
1300 | inc dword [edx+8] ; new file found |
||
1301 | dec dword [esp+4] |
||
1302 | jns .l2 |
||
1303 | dec ecx |
||
1304 | js .l2 |
||
1305 | inc dword [edx+4] ; new file block copied |
||
1306 | call fat_entry_to_bdfe |
||
1307 | .l2: |
||
1308 | add edi, 0x20 |
||
1309 | cmp edi, ebx |
||
1310 | jb .l1 |
||
1311 | pop eax |
||
1312 | inc eax |
||
1313 | dec dword [esp+4] |
||
1314 | jnz .new_sector |
||
1315 | mov eax, [cluster_tmp] |
||
1316 | test eax, eax |
||
1317 | jz .done |
||
1318 | call get_FAT |
||
1319 | cmp [hd_error], 0 |
||
1320 | jnz .notfound2 |
||
1321 | cmp eax, 2 |
||
1322 | jb .done |
||
1323 | cmp eax, [fatRESERVED] |
||
1324 | jae .done |
||
1325 | push eax |
||
1326 | mov eax, [SECTORS_PER_CLUSTER] |
||
1327 | mov [esp+8], eax |
||
1328 | pop eax |
||
1329 | pop ebx |
||
1330 | add esp, 4 |
||
1331 | jmp .new_cluster |
||
1332 | .notfound2: |
||
1333 | add esp, 8 |
||
1334 | .notfound: |
||
1335 | add esp, 262*2+4 |
||
1336 | pop ebp ecx esi edi |
||
1337 | mov eax, ERROR_FILE_NOT_FOUND |
||
1338 | or ebx, -1 |
||
1339 | ret |
||
1340 | .done: |
||
1341 | add esp, 262*2+4+8 |
||
1342 | pop ebp |
||
77 | diamond | 1343 | mov ebx, [edx+4] |
75 | diamond | 1344 | xor eax, eax |
1345 | dec ecx |
||
1346 | js @f |
||
1347 | mov al, ERROR_END_OF_FILE |
||
1348 | @@: |
||
1349 | pop ecx esi edi |
||
1350 | ret |
||
1351 | |||
83 | diamond | 1352 | fat16_root_next: |
1353 | cmp edi, buffer+0x200-0x20 |
||
1354 | jae fat16_root_next_sector |
||
1355 | add edi, 0x20 |
||
1356 | ret ; CF=0 |
||
1357 | fat16_root_next_sector: |
||
1358 | ; read next sector |
||
171 | diamond | 1359 | push [longname_sec2] |
1360 | pop [longname_sec1] |
||
83 | diamond | 1361 | push ecx |
1362 | mov ecx, [eax+4] |
||
171 | diamond | 1363 | push ecx |
1364 | add ecx, [ROOT_START] |
||
1365 | mov [longname_sec2], ecx |
||
1366 | pop ecx |
||
83 | diamond | 1367 | inc ecx |
1368 | mov [eax+4], ecx |
||
1369 | cmp ecx, [ROOT_SECTORS] |
||
1370 | pop ecx |
||
1371 | jae fat16_root_first.readerr |
||
1372 | fat16_root_first: |
||
1373 | mov eax, [eax+4] |
||
1374 | add eax, [ROOT_START] |
||
1375 | push ebx |
||
1376 | mov edi, buffer |
||
1377 | mov ebx, edi |
||
1378 | call hd_read |
||
1379 | pop ebx |
||
1380 | cmp [hd_error], 0 |
||
1381 | jnz .readerr |
||
1382 | ret ; CF=0 |
||
1383 | .readerr: |
||
1384 | stc |
||
1385 | ret |
||
1386 | fat16_root_begin_write: |
||
1387 | push edi eax |
||
1388 | call fat16_root_first |
||
1389 | pop eax edi |
||
1390 | ret |
||
1391 | fat16_root_end_write: |
||
1392 | pusha |
||
1393 | mov eax, [eax+4] |
||
1394 | add eax, [ROOT_START] |
||
1395 | mov ebx, buffer |
||
1396 | call hd_write |
||
1397 | popa |
||
1398 | ret |
||
1399 | fat16_root_next_write: |
||
1400 | cmp edi, buffer+0x200 |
||
1401 | jae @f |
||
1402 | ret |
||
1403 | @@: |
||
1404 | call fat16_root_end_write |
||
1405 | jmp fat16_root_next_sector |
||
1406 | fat16_root_extend_dir: |
||
1407 | stc |
||
1408 | ret |
||
1409 | |||
1410 | fat_notroot_next: |
||
1411 | cmp edi, buffer+0x200-0x20 |
||
1412 | jae fat_notroot_next_sector |
||
1413 | add edi, 0x20 |
||
1414 | ret ; CF=0 |
||
1415 | fat_notroot_next_sector: |
||
171 | diamond | 1416 | push [longname_sec2] |
1417 | pop [longname_sec1] |
||
1418 | push eax |
||
1419 | call fat_get_sector |
||
1420 | mov [longname_sec2], eax |
||
1421 | pop eax |
||
83 | diamond | 1422 | push ecx |
1423 | mov ecx, [eax+4] |
||
1424 | inc ecx |
||
1425 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
1426 | jae fat_notroot_next_cluster |
||
1427 | mov [eax+4], ecx |
||
1428 | jmp @f |
||
1429 | fat_notroot_next_cluster: |
||
1430 | push eax |
||
1431 | mov eax, [eax] |
||
1432 | call get_FAT |
||
1433 | mov ecx, eax |
||
1434 | pop eax |
||
1435 | cmp [hd_error], 0 |
||
1436 | jnz fat_notroot_next_err |
||
1437 | cmp ecx, [fatRESERVED] |
||
1438 | jae fat_notroot_next_err |
||
1439 | mov [eax], ecx |
||
1440 | and dword [eax+4], 0 |
||
1441 | @@: |
||
1442 | pop ecx |
||
1443 | fat_notroot_first: |
||
1444 | call fat_get_sector |
||
1445 | push ebx |
||
1446 | mov edi, buffer |
||
1447 | mov ebx, edi |
||
1448 | call hd_read |
||
1449 | pop ebx |
||
1450 | cmp [hd_error], 0 |
||
1451 | jnz @f |
||
1452 | ret ; CF=0 |
||
1453 | fat_notroot_next_err: |
||
1454 | pop ecx |
||
1455 | @@: |
||
1456 | stc |
||
1457 | ret |
||
1458 | fat_notroot_begin_write: |
||
1459 | push eax edi |
||
1460 | call fat_notroot_first |
||
1461 | pop edi eax |
||
1462 | ret |
||
1463 | fat_notroot_end_write: |
||
1464 | call fat_get_sector |
||
1465 | push ebx |
||
1466 | mov ebx, buffer |
||
1467 | call hd_write |
||
1468 | pop ebx |
||
1469 | ret |
||
1470 | fat_notroot_next_write: |
||
1471 | cmp edi, buffer+0x200 |
||
1472 | jae @f |
||
1473 | ret |
||
1474 | @@: |
||
1475 | push eax |
||
1476 | call fat_notroot_end_write |
||
1477 | pop eax |
||
1478 | jmp fat_notroot_next_sector |
||
1479 | fat_notroot_extend_dir: |
||
1480 | push eax |
||
1481 | mov eax, [eax] |
||
1482 | call get_free_FAT |
||
1483 | jnc .found |
||
1484 | pop eax |
||
1485 | ret ; CF=1 |
||
1486 | .found: |
||
1487 | push edx |
||
1488 | mov edx, [fatEND] |
||
1489 | call set_FAT |
||
1490 | mov edx, eax |
||
1491 | mov eax, [esp+4] |
||
1492 | mov eax, [eax] |
||
1493 | push edx |
||
1494 | call set_FAT |
||
1495 | pop edx |
||
1496 | cmp [hd_error], 0 |
||
1497 | jz @f |
||
1498 | pop edx |
||
1499 | pop eax |
||
1500 | stc |
||
1501 | ret |
||
1502 | @@: |
||
1503 | push ecx |
||
1504 | or ecx, -1 |
||
1505 | call add_disk_free_space |
||
1506 | ; zero new cluster |
||
1507 | mov ecx, 512/4 |
||
1508 | mov edi, buffer |
||
1509 | push edi |
||
1510 | xor eax, eax |
||
1511 | rep stosd |
||
1512 | pop edi |
||
1513 | pop ecx |
||
1514 | mov eax, [esp+4] |
||
1515 | mov [eax], edx |
||
1516 | and dword [eax+4], 0 |
||
1517 | pop edx |
||
1518 | mov eax, [eax] |
||
1519 | dec eax |
||
1520 | dec eax |
||
1521 | push ebx ecx |
||
1522 | mov ecx, [SECTORS_PER_CLUSTER] |
||
1523 | imul eax, ecx |
||
1524 | add eax, [DATA_START] |
||
1525 | mov ebx, edi |
||
1526 | @@: |
||
1527 | call hd_write |
||
1528 | inc eax |
||
1529 | loop @b |
||
1530 | pop ecx ebx eax |
||
1531 | clc |
||
1532 | ret |
||
1533 | |||
1534 | fat_get_sector: |
||
1535 | push ecx |
||
1536 | mov ecx, [eax] |
||
1537 | dec ecx |
||
1538 | dec ecx |
||
1539 | imul ecx, [SECTORS_PER_CLUSTER] |
||
1540 | add ecx, [DATA_START] |
||
1541 | add ecx, [eax+4] |
||
1542 | mov eax, ecx |
||
1543 | pop ecx |
||
1544 | ret |
||
1545 | |||
1546 | ;---------------------------------------------------------------- |
||
1547 | ; |
||
1548 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
1549 | ; |
||
1550 | ; esi points to filename |
||
1551 | ; ebx ignored (reserved) |
||
1552 | ; ecx number of bytes to write, 0+ |
||
1553 | ; edx mem location to data |
||
1554 | ; |
||
1555 | ; ret ebx = number of written bytes |
||
1556 | ; eax = 0 ok read or other = errormsg |
||
1557 | ; |
||
1558 | ;-------------------------------------------------------------- |
||
1559 | fshrad: |
||
1560 | mov eax, ERROR_ACCESS_DENIED |
||
1561 | xor ebx, ebx |
||
1562 | ret |
||
1563 | fshrfs: |
||
1564 | mov eax, ERROR_UNKNOWN_FS |
||
1565 | xor ebx, ebx |
||
1566 | ret |
||
1567 | |||
321 | diamond | 1568 | fs_HdCreateFolder: |
1569 | mov al, 1 |
||
1570 | jmp fs_HdRewrite.common |
||
1571 | |||
83 | diamond | 1572 | fs_HdRewrite: |
321 | diamond | 1573 | xor eax, eax |
1574 | .common: |
||
256 | diamond | 1575 | cmp [fs_type], 1 |
1576 | jz ntfs_HdRewrite |
||
1577 | cmp [fs_type], 16 |
||
1578 | jz @f |
||
1579 | cmp [fs_type], 32 |
||
1580 | jnz fshrfs |
||
1581 | @@: |
||
83 | diamond | 1582 | cmp byte [esi], 0 |
1583 | jz fshrad |
||
1584 | pushad |
||
521 | diamond | 1585 | xor edi, edi |
83 | diamond | 1586 | push esi |
521 | diamond | 1587 | test ebp, ebp |
1588 | jz @f |
||
1589 | mov esi, ebp |
||
83 | diamond | 1590 | @@: |
1591 | lodsb |
||
1592 | test al, al |
||
1593 | jz @f |
||
1594 | cmp al, '/' |
||
1595 | jnz @b |
||
521 | diamond | 1596 | lea edi, [esi-1] |
83 | diamond | 1597 | jmp @b |
1598 | @@: |
||
1599 | pop esi |
||
521 | diamond | 1600 | test edi, edi |
1601 | jnz .noroot |
||
83 | diamond | 1602 | test ebp, ebp |
521 | diamond | 1603 | jnz .hasebp |
83 | diamond | 1604 | mov ebp, [ROOT_CLUSTER] |
256 | diamond | 1605 | cmp [fs_type], 32 |
83 | diamond | 1606 | jz .pushnotroot |
1607 | push fat16_root_extend_dir |
||
1608 | push fat16_root_end_write |
||
1609 | push fat16_root_next_write |
||
1610 | push fat16_root_begin_write |
||
1611 | xor ebp, ebp |
||
1612 | push ebp |
||
1613 | push ebp |
||
1614 | push fat16_root_first |
||
1615 | push fat16_root_next |
||
1616 | jmp .common1 |
||
521 | diamond | 1617 | .hasebp: |
1618 | mov eax, ERROR_ACCESS_DENIED |
||
1619 | cmp byte [ebp], 0 |
||
1620 | jz .ret1 |
||
1621 | push ebp |
||
1622 | xor ebp, ebp |
||
1623 | call hd_find_lfn |
||
1624 | pop esi |
||
1625 | jc .notfound0 |
||
1626 | jmp .common0 |
||
83 | diamond | 1627 | .noroot: |
335 | diamond | 1628 | mov eax, ERROR_ACCESS_DENIED |
521 | diamond | 1629 | cmp byte [edi+1], 0 |
335 | diamond | 1630 | jz .ret1 |
83 | diamond | 1631 | ; check existence |
521 | diamond | 1632 | mov byte [edi], 0 |
1633 | push edi |
||
83 | diamond | 1634 | call hd_find_lfn |
521 | diamond | 1635 | pop esi |
1636 | mov byte [esi], '/' |
||
83 | diamond | 1637 | jnc @f |
521 | diamond | 1638 | .notfound0: |
83 | diamond | 1639 | mov eax, ERROR_FILE_NOT_FOUND |
1640 | .ret1: |
||
1641 | mov [esp+28], eax |
||
1642 | popad |
||
1643 | xor ebx, ebx |
||
1644 | ret |
||
1645 | @@: |
||
521 | diamond | 1646 | inc esi |
1647 | .common0: |
||
83 | diamond | 1648 | test byte [edi+11], 0x10 ; must be directory |
1649 | mov eax, ERROR_ACCESS_DENIED |
||
1650 | jz .ret1 |
||
1651 | mov ebp, [edi+20-2] |
||
1652 | mov bp, [edi+26] ; ebp=cluster |
||
1653 | mov eax, ERROR_FAT_TABLE |
||
1654 | cmp ebp, 2 |
||
1655 | jb .ret1 |
||
1656 | .pushnotroot: |
||
1657 | push fat_notroot_extend_dir |
||
1658 | push fat_notroot_end_write |
||
1659 | push fat_notroot_next_write |
||
1660 | push fat_notroot_begin_write |
||
1661 | push 0 |
||
1662 | push ebp |
||
1663 | push fat_notroot_first |
||
1664 | push fat_notroot_next |
||
1665 | .common1: |
||
1666 | call fat_find_lfn |
||
1667 | jc .notfound |
||
321 | diamond | 1668 | ; found |
91 | diamond | 1669 | test byte [edi+11], 10h |
321 | diamond | 1670 | jz .exists_file |
1671 | ; found directory; if we are creating directory, return OK, |
||
1672 | ; if we are creating file, say "access denied" |
||
1673 | add esp, 32 |
||
1674 | popad |
||
1675 | test al, al |
||
1676 | mov eax, ERROR_ACCESS_DENIED |
||
91 | diamond | 1677 | jz @f |
321 | diamond | 1678 | mov al, 0 |
1679 | @@: |
||
1680 | xor ebx, ebx |
||
1681 | ret |
||
1682 | .exists_file: |
||
1683 | ; found file; if we are creating directory, return "access denied", |
||
1684 | ; if we are creating file, delete existing file and continue |
||
1685 | cmp byte [esp+32+28], 0 |
||
1686 | jz @f |
||
91 | diamond | 1687 | add esp, 32 |
1688 | popad |
||
1689 | mov eax, ERROR_ACCESS_DENIED |
||
1690 | xor ebx, ebx |
||
1691 | ret |
||
1692 | @@: |
||
1693 | ; delete FAT chain |
||
83 | diamond | 1694 | push edi |
1695 | xor eax, eax |
||
1696 | mov dword [edi+28], eax ; zero size |
||
1697 | xor ecx, ecx |
||
1698 | mov eax, [edi+20-2] |
||
1699 | mov ax, [edi+26] |
||
1700 | mov word [edi+20], cx |
||
1701 | mov word [edi+26], cx |
||
1702 | test eax, eax |
||
1703 | jz .done1 |
||
1704 | @@: |
||
1705 | cmp eax, [fatRESERVED] |
||
1706 | jae .done1 |
||
1707 | push edx |
||
1708 | xor edx, edx |
||
1709 | call set_FAT |
||
1710 | mov eax, edx |
||
1711 | pop edx |
||
1712 | inc ecx |
||
1713 | jmp @b |
||
1714 | .done1: |
||
1715 | pop edi |
||
1716 | call get_time_for_file |
||
1717 | mov [edi+22], ax |
||
1718 | call get_date_for_file |
||
1719 | mov [edi+24], ax |
||
1720 | mov [edi+18], ax |
||
1721 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1722 | jmp .doit |
||
1723 | .notfound: |
||
1724 | ; file is not found; generate short name |
||
1725 | call fat_name_is_legal |
||
1726 | jc @f |
||
1727 | add esp, 32 |
||
1728 | popad |
||
1729 | mov eax, ERROR_FILE_NOT_FOUND |
||
1730 | xor ebx, ebx |
||
1731 | ret |
||
1732 | @@: |
||
1733 | sub esp, 12 |
||
1734 | mov edi, esp |
||
1735 | call fat_gen_short_name |
||
1736 | .test_short_name_loop: |
||
1737 | push esi edi ecx |
||
1738 | mov esi, edi |
||
1739 | lea eax, [esp+12+12+8] |
||
1740 | mov [eax], ebp |
||
1741 | and dword [eax+4], 0 |
||
1742 | call dword [eax-4] |
||
1743 | jc .found |
||
1744 | .test_short_name_entry: |
||
1745 | cmp byte [edi+11], 0xF |
||
1746 | jz .test_short_name_cont |
||
1747 | mov ecx, 11 |
||
1748 | push esi edi |
||
1749 | repz cmpsb |
||
1750 | pop edi esi |
||
1751 | jz .short_name_found |
||
1752 | .test_short_name_cont: |
||
1753 | lea eax, [esp+12+12+8] |
||
1754 | call dword [eax-8] |
||
1755 | jnc .test_short_name_entry |
||
1756 | jmp .found |
||
1757 | .short_name_found: |
||
1758 | pop ecx edi esi |
||
1759 | call fat_next_short_name |
||
1760 | jnc .test_short_name_loop |
||
1761 | .disk_full: |
||
1762 | add esp, 12+32 |
||
1763 | popa |
||
1764 | mov eax, ERROR_DISK_FULL |
||
1765 | xor ebx, ebx |
||
1766 | ret |
||
1767 | .found: |
||
1768 | pop ecx edi esi |
||
1769 | ; now find space in directory |
||
1770 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1771 | mov al, '~' |
||
1772 | push ecx edi |
||
1773 | mov ecx, 8 |
||
1774 | repnz scasb |
||
1775 | push 1 |
||
1776 | pop eax ; 1 entry |
||
1777 | jnz .notilde |
||
1778 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1779 | xor eax, eax |
||
1780 | @@: |
||
1781 | cmp byte [esi], 0 |
||
1782 | jz @f |
||
1783 | inc esi |
||
1784 | inc eax |
||
1785 | jmp @b |
||
1786 | @@: |
||
1787 | sub esi, eax |
||
1788 | add eax, 12+13 |
||
1789 | mov ecx, 13 |
||
1790 | push edx |
||
1791 | cdq |
||
1792 | div ecx |
||
1793 | pop edx |
||
1794 | .notilde: |
||
1795 | push -1 |
||
1796 | push -1 |
||
1797 | push -1 |
||
1798 | ; find |
||
1799 | xor ecx, ecx |
||
1800 | push eax |
||
1801 | lea eax, [esp+16+8+12+8] |
||
1802 | mov [eax], ebp |
||
1803 | and dword [eax+4], 0 |
||
1804 | call dword [eax-4] |
||
1805 | pop eax |
||
1806 | jnc .scan_dir |
||
1807 | .fsfrfe3: |
||
1808 | add esp, 12+8+12+32 |
||
1809 | popad |
||
1810 | mov eax, 11 |
||
1811 | xor ebx, ebx |
||
1812 | ret |
||
1813 | .scan_dir: |
||
1814 | cmp byte [edi], 0 |
||
1815 | jz .free |
||
1816 | cmp byte [edi], 0xE5 |
||
1817 | jz .free |
||
1818 | xor ecx, ecx |
||
1819 | .scan_cont: |
||
1820 | push eax |
||
1821 | lea eax, [esp+16+8+12+8] |
||
1822 | call dword [eax-8] |
||
1823 | pop eax |
||
1824 | jnc .scan_dir |
||
1825 | cmp [hd_error], 0 |
||
1826 | jnz .fsfrfe3 |
||
1827 | push eax |
||
1828 | lea eax, [esp+16+8+12+8] |
||
1829 | call dword [eax+20] ; extend directory |
||
1830 | pop eax |
||
1831 | jnc .scan_dir |
||
1832 | add esp, 12+8+12+32 |
||
1833 | popad |
||
1834 | mov eax, ERROR_DISK_FULL |
||
1835 | xor ebx, ebx |
||
1836 | ret |
||
1837 | .free: |
||
1838 | test ecx, ecx |
||
1839 | jnz @f |
||
1840 | mov [esp], edi |
||
1841 | mov ecx, [esp+12+8+12+8] |
||
1842 | mov [esp+4], ecx |
||
1843 | mov ecx, [esp+12+8+12+12] |
||
1844 | mov [esp+8], ecx |
||
1845 | xor ecx, ecx |
||
1846 | @@: |
||
1847 | inc ecx |
||
1848 | cmp ecx, eax |
||
1849 | jb .scan_cont |
||
1850 | ; found! |
||
1851 | ; calculate name checksum |
||
1852 | push esi ecx |
||
1853 | mov esi, [esp+8+12] |
||
1854 | mov ecx, 11 |
||
1855 | xor eax, eax |
||
1856 | @@: |
||
1857 | ror al, 1 |
||
1858 | add al, [esi] |
||
1859 | inc esi |
||
1860 | loop @b |
||
1861 | pop ecx esi |
||
1862 | pop edi |
||
1863 | pop dword [esp+8+12+12] |
||
1864 | pop dword [esp+8+12+12] |
||
1865 | ; edi points to first entry in free chunk |
||
1866 | dec ecx |
||
1867 | jz .nolfn |
||
1868 | push esi |
||
1869 | push eax |
||
1870 | lea eax, [esp+8+8+12+8] |
||
1871 | call dword [eax+8] ; begin write |
||
1872 | mov al, 40h |
||
1873 | .writelfn: |
||
1874 | or al, cl |
||
1875 | mov esi, [esp+4] |
||
1876 | push ecx |
||
1877 | dec ecx |
||
1878 | imul ecx, 13 |
||
1879 | add esi, ecx |
||
1880 | stosb |
||
1881 | mov cl, 5 |
||
1882 | call fs_RamdiskRewrite.read_symbols |
||
1883 | mov ax, 0xF |
||
1884 | stosw |
||
1885 | mov al, [esp+4] |
||
1886 | stosb |
||
1887 | mov cl, 6 |
||
1888 | call fs_RamdiskRewrite.read_symbols |
||
1889 | xor eax, eax |
||
1890 | stosw |
||
1891 | mov cl, 2 |
||
1892 | call fs_RamdiskRewrite.read_symbols |
||
1893 | pop ecx |
||
1894 | lea eax, [esp+8+8+12+8] |
||
1895 | call dword [eax+12] ; next write |
||
1896 | xor eax, eax |
||
1897 | loop .writelfn |
||
1898 | pop eax |
||
1899 | pop esi |
||
1900 | ; lea eax, [esp+8+12+8] |
||
1901 | ; call dword [eax+16] ; end write |
||
1902 | .nolfn: |
||
1903 | xchg esi, [esp] |
||
1904 | mov ecx, 11 |
||
1905 | rep movsb |
||
1906 | mov word [edi], 20h ; attributes |
||
1907 | sub edi, 11 |
||
1908 | pop esi ecx |
||
1909 | add esp, 12 |
||
1910 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1911 | call get_time_for_file |
||
1912 | mov [edi+14], ax ; creation time |
||
1913 | mov [edi+22], ax ; last write time |
||
1914 | call get_date_for_file |
||
1915 | mov [edi+16], ax ; creation date |
||
1916 | mov [edi+24], ax ; last write date |
||
1917 | mov [edi+18], ax ; last access date |
||
1918 | xor ecx, ecx |
||
1919 | mov word [edi+20], cx ; high word of cluster |
||
1920 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
1921 | mov dword [edi+28], ecx ; file size - to be filled |
||
321 | diamond | 1922 | cmp byte [esp+32+28], cl |
1923 | jz .doit |
||
1924 | ; create directory |
||
1925 | mov byte [edi+11], 10h ; attributes: folder |
||
1926 | mov edx, edi |
||
1927 | lea eax, [esp+8] |
||
1928 | call dword [eax+16] ; flush directory |
||
1929 | push ecx |
||
1930 | mov ecx, [SECTORS_PER_CLUSTER] |
||
1931 | shl ecx, 9 |
||
1932 | jmp .doit2 |
||
83 | diamond | 1933 | .doit: |
1934 | lea eax, [esp+8] |
||
1935 | call dword [eax+16] ; flush directory |
||
1936 | push ecx |
||
1937 | mov ecx, [esp+4+32+24] |
||
321 | diamond | 1938 | .doit2: |
83 | diamond | 1939 | push ecx |
1940 | push edi |
||
1941 | mov esi, edx |
||
1942 | test ecx, ecx |
||
1943 | jz .done |
||
1944 | mov eax, 2 |
||
1945 | call get_free_FAT |
||
1946 | jc .diskfull |
||
1947 | push eax |
||
1948 | mov [edi+26], ax |
||
1949 | shr eax, 16 |
||
1950 | mov [edi+20], ax |
||
1951 | lea eax, [esp+16+8] |
||
1952 | call dword [eax+16] ; flush directory |
||
1953 | pop eax |
||
1954 | push edx |
||
1955 | mov edx, [fatEND] |
||
1956 | call set_FAT |
||
1957 | pop edx |
||
1958 | .write_cluster: |
||
1959 | push eax |
||
1960 | dec eax |
||
1961 | dec eax |
||
1962 | mov ebp, [SECTORS_PER_CLUSTER] |
||
1963 | imul eax, ebp |
||
1964 | add eax, [DATA_START] |
||
1965 | ; write data |
||
1966 | .write_sector: |
||
321 | diamond | 1967 | cmp byte [esp+16+32+28], 0 |
1968 | jnz .writedir |
||
83 | diamond | 1969 | mov ecx, 512 |
1970 | cmp dword [esp+8], ecx |
||
1971 | jb .writeshort |
||
1972 | ; we can write directly from given buffer |
||
1973 | mov ebx, esi |
||
1974 | add esi, ecx |
||
1975 | jmp .writecommon |
||
1976 | .writeshort: |
||
1977 | mov ecx, [esp+8] |
||
1978 | push ecx |
||
1979 | mov edi, buffer |
||
1980 | mov ebx, edi |
||
1981 | rep movsb |
||
321 | diamond | 1982 | .writedircont: |
83 | diamond | 1983 | mov ecx, buffer+0x200 |
1984 | sub ecx, edi |
||
1985 | push eax |
||
1986 | xor eax, eax |
||
1987 | rep stosb |
||
1988 | pop eax |
||
1989 | pop ecx |
||
1990 | .writecommon: |
||
1991 | call hd_write |
||
1992 | cmp [hd_error], 0 |
||
1993 | jnz .writeerr |
||
1994 | inc eax |
||
1995 | sub dword [esp+8], ecx |
||
1996 | jz .writedone |
||
1997 | dec ebp |
||
1998 | jnz .write_sector |
||
1999 | ; allocate new cluster |
||
2000 | pop eax |
||
2001 | mov ecx, eax |
||
2002 | call get_free_FAT |
||
2003 | jc .diskfull |
||
2004 | push edx |
||
2005 | mov edx, [fatEND] |
||
2006 | call set_FAT |
||
2007 | xchg eax, ecx |
||
2008 | mov edx, ecx |
||
2009 | call set_FAT |
||
2010 | pop edx |
||
2011 | xchg eax, ecx |
||
2012 | jmp .write_cluster |
||
2013 | .diskfull: |
||
2014 | mov eax, ERROR_DISK_FULL |
||
2015 | jmp .ret |
||
2016 | .writeerr: |
||
2017 | pop eax |
||
2018 | sub esi, ecx |
||
2019 | mov eax, 11 |
||
2020 | jmp .ret |
||
2021 | .writedone: |
||
2022 | pop eax |
||
2023 | .done: |
||
2024 | xor eax, eax |
||
2025 | .ret: |
||
2026 | pop edi ecx |
||
2027 | mov ebx, esi |
||
2028 | sub ebx, edx |
||
2029 | pop ebp |
||
2030 | mov [esp+32+28], eax |
||
2031 | lea eax, [esp+8] |
||
2032 | call dword [eax+8] |
||
2033 | mov [edi+28], ebx |
||
2034 | call dword [eax+16] |
||
2035 | mov [esp+32+16], ebx |
||
2036 | lea eax, [ebx+511] |
||
2037 | shr eax, 9 |
||
2038 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2039 | lea eax, [eax+ecx-1] |
||
2040 | xor edx, edx |
||
2041 | div ecx |
||
2042 | mov ecx, ebp |
||
2043 | sub ecx, eax |
||
2044 | call add_disk_free_space |
||
2045 | add esp, 32 |
||
2046 | call update_disk |
||
2047 | popad |
||
2048 | ret |
||
321 | diamond | 2049 | .writedir: |
2050 | push 512 |
||
2051 | mov edi, buffer |
||
2052 | mov ebx, edi |
||
2053 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2054 | shl ecx, 9 |
||
2055 | cmp ecx, [esp+12] |
||
2056 | jnz .writedircont |
||
2057 | dec dword [esp+16] |
||
2058 | push esi |
||
2059 | mov ecx, 32/4 |
||
2060 | rep movsd |
||
2061 | pop esi |
||
2062 | mov dword [edi-32], '. ' |
||
2063 | mov dword [edi-32+4], ' ' |
||
2064 | mov dword [edi-32+8], ' ' |
||
2065 | mov byte [edi-32+11], 10h |
||
2066 | push esi |
||
2067 | mov ecx, 32/4 |
||
2068 | rep movsd |
||
2069 | pop esi |
||
2070 | mov dword [edi-32], '.. ' |
||
2071 | mov dword [edi-32+4], ' ' |
||
2072 | mov dword [edi-32+8], ' ' |
||
2073 | mov byte [edi-32+11], 10h |
||
2074 | mov ecx, [esp+20+8] |
||
2075 | cmp ecx, [ROOT_CLUSTER] |
||
2076 | jnz @f |
||
2077 | xor ecx, ecx |
||
2078 | @@: |
||
2079 | mov word [edi-32+26], cx |
||
2080 | shr ecx, 16 |
||
2081 | mov [edi-32+20], cx |
||
2082 | jmp .writedircont |
||
83 | diamond | 2083 | |
131 | diamond | 2084 | ;---------------------------------------------------------------- |
2085 | ; |
||
256 | diamond | 2086 | ; fs_HdWrite - LFN variant for writing to hard disk |
131 | diamond | 2087 | ; |
2088 | ; esi points to filename |
||
2089 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2090 | ; may be ebx=0 - start from first byte |
||
2091 | ; ecx number of bytes to write, 0+ |
||
2092 | ; edx mem location to data |
||
2093 | ; |
||
2094 | ; ret ebx = bytes written (maybe 0) |
||
2095 | ; eax = 0 ok write or other = errormsg |
||
2096 | ; |
||
2097 | ;-------------------------------------------------------------- |
||
2098 | fs_HdWrite.access_denied: |
||
2099 | push ERROR_ACCESS_DENIED |
||
2100 | fs_HdWrite.ret0: |
||
2101 | pop eax |
||
2102 | xor ebx, ebx |
||
2103 | ret |
||
2104 | |||
2105 | fs_HdWrite.ret11: |
||
2106 | push 11 |
||
2107 | jmp fs_HdWrite.ret0 |
||
2108 | |||
2109 | fs_HdWrite: |
||
256 | diamond | 2110 | cmp [fs_type], 1 |
2111 | jz ntfs_HdWrite |
||
2112 | cmp [fs_type], 16 |
||
2113 | jz @f |
||
2114 | cmp [fs_type], 32 |
||
2115 | jz @f |
||
131 | diamond | 2116 | push ERROR_UNKNOWN_FS |
2117 | jmp .ret0 |
||
2118 | @@: |
||
2119 | cmp byte [esi], 0 |
||
2120 | jz .access_denied |
||
2121 | pushad |
||
2122 | call hd_find_lfn |
||
2123 | pushfd |
||
2124 | cmp [hd_error], 0 |
||
2125 | jz @f |
||
2126 | popfd |
||
2127 | popad |
||
2128 | push 11 |
||
2129 | jmp .ret0 |
||
2130 | @@: |
||
2131 | popfd |
||
2132 | jnc .found |
||
2133 | popad |
||
2134 | push ERROR_FILE_NOT_FOUND |
||
2135 | jmp .ret0 |
||
2136 | .found: |
||
2137 | ; FAT does not support files larger than 4GB |
||
2138 | test ebx, ebx |
||
2139 | jz .l1 |
||
2140 | cmp dword [ebx+4], 0 |
||
2141 | jz @f |
||
2142 | .eof: |
||
2143 | popad |
||
2144 | push ERROR_END_OF_FILE |
||
2145 | jmp .ret0 |
||
2146 | @@: |
||
2147 | mov ebx, [ebx] |
||
2148 | .l1: |
||
2149 | ; now edi points to direntry, ebx=start byte to write, |
||
2150 | ; ecx=number of bytes to write, edx=data pointer |
||
2151 | |||
2152 | ; extend file if needed |
||
2153 | add ecx, ebx |
||
2154 | jc .eof ; FAT does not support files larger than 4GB |
||
2155 | push eax ; save directory sector |
||
2156 | push 0 ; return value=0 |
||
2157 | |||
2158 | call get_time_for_file |
||
2159 | mov [edi+22], ax ; last write time |
||
2160 | call get_date_for_file |
||
2161 | mov [edi+24], ax ; last write date |
||
2162 | mov [edi+18], ax ; last access date |
||
2163 | |||
2164 | push dword [edi+28] ; save current file size |
||
2165 | cmp ecx, [edi+28] |
||
2166 | jbe .length_ok |
||
2167 | cmp ecx, ebx |
||
2168 | jz .length_ok |
||
2169 | call hd_extend_file |
||
2170 | jnc .length_ok |
||
2171 | mov [esp+4], eax |
||
2172 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2173 | ; First two cases are fatal errors, in third case we may write some data |
||
2174 | cmp al, ERROR_DISK_FULL |
||
2175 | jz .disk_full |
||
2176 | pop eax |
||
2177 | pop eax |
||
2178 | mov [esp+4+28], eax |
||
2179 | pop eax |
||
2180 | popad |
||
2181 | xor ebx, ebx |
||
2182 | ret |
||
2183 | .disk_full: |
||
2184 | ; correct number of bytes to write |
||
2185 | mov ecx, [edi+28] |
||
2186 | cmp ecx, ebx |
||
2187 | ja .length_ok |
||
2188 | .ret: |
||
2189 | call update_disk |
||
2190 | cmp [hd_error], 0 |
||
2191 | jz @f |
||
2192 | mov byte [esp+4], 11 |
||
2193 | @@: |
||
2194 | pop eax |
||
2195 | pop eax |
||
2196 | mov [esp+4+28], eax ; eax=return value |
||
2197 | pop eax |
||
2198 | sub edx, [esp+20] |
||
2199 | mov [esp+16], edx ; ebx=number of written bytes |
||
2200 | popad |
||
2201 | ret |
||
2202 | .length_ok: |
||
2203 | mov esi, [edi+28] |
||
2204 | mov eax, [edi+20-2] |
||
2205 | mov ax, [edi+26] |
||
2206 | mov edi, eax ; edi=current cluster |
||
2207 | xor ebp, ebp ; ebp=current sector in cluster |
||
2208 | ; save directory |
||
2209 | mov eax, [esp+8] |
||
2210 | push ebx |
||
2211 | mov ebx, buffer |
||
2212 | call hd_write |
||
2213 | pop ebx |
||
2214 | cmp [hd_error], 0 |
||
2215 | jz @f |
||
2216 | .device_err: |
||
2217 | mov byte [esp+4], 11 |
||
2218 | jmp .ret |
||
2219 | @@: |
||
2220 | |||
2221 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
2222 | sub ecx, ebx |
||
2223 | jz .ret |
||
2224 | .write_loop: |
||
321 | diamond | 2225 | ; skip unmodified sectors |
2226 | cmp dword [esp], 0x200 |
||
2227 | jb .modify |
||
2228 | sub ebx, 0x200 |
||
2229 | jae .skip |
||
2230 | add ebx, 0x200 |
||
2231 | .modify: |
||
131 | diamond | 2232 | ; get length of data in current sector |
2233 | push ecx |
||
2234 | sub ebx, 0x200 |
||
2235 | jb .hasdata |
||
2236 | neg ebx |
||
2237 | xor ecx, ecx |
||
2238 | jmp @f |
||
2239 | .hasdata: |
||
2240 | neg ebx |
||
2241 | cmp ecx, ebx |
||
2242 | jbe @f |
||
2243 | mov ecx, ebx |
||
2244 | @@: |
||
2245 | ; get current sector number |
||
2246 | mov eax, edi |
||
2247 | dec eax |
||
2248 | dec eax |
||
2249 | imul eax, [SECTORS_PER_CLUSTER] |
||
2250 | add eax, [DATA_START] |
||
2251 | add eax, ebp |
||
2252 | ; load sector if needed |
||
2253 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
2254 | jz .noread |
||
2255 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2256 | jz .noread |
||
2257 | cmp ecx, esi ; (same for the last sector) |
||
2258 | jz .noread |
||
2259 | push ebx |
||
2260 | mov ebx, buffer |
||
2261 | call hd_read |
||
2262 | pop ebx |
||
2263 | cmp [hd_error], 0 |
||
2264 | jz @f |
||
2265 | .device_err2: |
||
2266 | pop ecx |
||
2267 | jmp .device_err |
||
2268 | @@: |
||
2269 | .noread: |
||
2270 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2271 | push eax ecx edi |
||
2272 | xor eax, eax |
||
2273 | mov ecx, 0x200 |
||
2274 | sub ecx, [esp+4+12] |
||
2275 | jbe @f |
||
2276 | mov edi, buffer |
||
2277 | add edi, [esp+4+12] |
||
2278 | rep stosb |
||
2279 | @@: |
||
2280 | ; zero uninitialized data in the last sector |
||
2281 | mov ecx, 0x200 |
||
2282 | sub ecx, esi |
||
2283 | jbe @f |
||
2284 | mov edi, buffer |
||
2285 | add edi, esi |
||
2286 | rep stosb |
||
2287 | @@: |
||
321 | diamond | 2288 | pop edi ecx |
131 | diamond | 2289 | ; copy new data |
2290 | mov eax, edx |
||
2291 | neg ebx |
||
2292 | jecxz @f |
||
2293 | add ebx, buffer+0x200 |
||
2294 | call memmove |
||
2295 | xor ebx, ebx |
||
2296 | @@: |
||
2297 | pop eax |
||
2298 | ; save sector |
||
2299 | push ebx |
||
2300 | mov ebx, buffer |
||
2301 | call hd_write |
||
2302 | pop ebx |
||
2303 | cmp [hd_error], 0 |
||
2304 | jnz .device_err2 |
||
2305 | add edx, ecx |
||
2306 | sub [esp], ecx |
||
2307 | pop ecx |
||
2308 | jz .ret |
||
321 | diamond | 2309 | .skip: |
131 | diamond | 2310 | ; next sector |
2311 | inc ebp |
||
2312 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2313 | jb @f |
||
2314 | xor ebp, ebp |
||
2315 | mov eax, edi |
||
2316 | call get_FAT |
||
2317 | mov edi, eax |
||
2318 | cmp [hd_error], 0 |
||
2319 | jnz .device_err |
||
2320 | @@: |
||
2321 | sub esi, 0x200 |
||
2322 | jae @f |
||
2323 | xor esi, esi |
||
2324 | @@: |
||
2325 | sub dword [esp], 0x200 |
||
2326 | jae @f |
||
2327 | and dword [esp], 0 |
||
2328 | @@: jmp .write_loop |
||
2329 | |||
2330 | hd_extend_file.zero_size: |
||
2331 | xor eax, eax |
||
2332 | jmp hd_extend_file.start_extend |
||
2333 | |||
2334 | ; extends file on hd to given size (new data area is undefined) |
||
2335 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 2336 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 2337 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
2338 | hd_extend_file: |
||
2339 | push ebp |
||
2340 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2341 | imul ebp, [BYTES_PER_SECTOR] |
||
2342 | push ecx |
||
2343 | ; find the last cluster of file |
||
2344 | mov eax, [edi+20-2] |
||
2345 | mov ax, [edi+26] |
||
2346 | mov ecx, [edi+28] |
||
2347 | jecxz .zero_size |
||
2348 | .last_loop: |
||
2349 | sub ecx, ebp |
||
2350 | jbe .last_found |
||
2351 | call get_FAT |
||
2352 | cmp [hd_error], 0 |
||
2353 | jz @f |
||
2354 | .device_err: |
||
2355 | pop ecx |
||
2356 | .device_err2: |
||
2357 | pop ebp |
||
2358 | push 11 |
||
2359 | .ret_err: |
||
2360 | pop eax |
||
2361 | stc |
||
2362 | ret |
||
2363 | @@: |
||
2364 | cmp eax, 2 |
||
2365 | jb .fat_err |
||
2366 | cmp eax, [fatRESERVED] |
||
2367 | jb .last_loop |
||
2368 | .fat_err: |
||
2369 | pop ecx ebp |
||
2370 | push ERROR_FAT_TABLE |
||
2371 | jmp .ret_err |
||
2372 | .last_found: |
||
2373 | push eax |
||
2374 | call get_FAT |
||
2375 | cmp [hd_error], 0 |
||
2376 | jz @f |
||
2377 | pop eax |
||
2378 | jmp .device_err |
||
2379 | @@: |
||
2380 | cmp eax, [fatRESERVED] |
||
2381 | pop eax |
||
2382 | jb .fat_err |
||
2383 | ; set length to full number of clusters |
||
2384 | sub [edi+28], ecx |
||
2385 | .start_extend: |
||
2386 | pop ecx |
||
2387 | ; now do extend |
||
2388 | push edx |
||
2389 | mov edx, 2 ; start scan from cluster 2 |
||
2390 | .extend_loop: |
||
2391 | cmp [edi+28], ecx |
||
2392 | jae .extend_done |
||
2393 | ; add new cluster |
||
2394 | push eax |
||
2395 | mov eax, edx |
||
2396 | call get_free_FAT |
||
2397 | jc .disk_full |
||
2398 | mov edx, [fatEND] |
||
2399 | call set_FAT |
||
2400 | mov edx, eax |
||
2401 | pop eax |
||
2402 | test eax, eax |
||
2403 | jz .first_cluster |
||
2404 | push edx |
||
2405 | call set_FAT |
||
2406 | pop edx |
||
2407 | jmp @f |
||
2408 | .first_cluster: |
||
2409 | ror edx, 16 |
||
2410 | mov [edi+20], dx |
||
2411 | ror edx, 16 |
||
2412 | mov [edi+26], dx |
||
2413 | @@: |
||
133 | diamond | 2414 | push ecx |
2415 | mov ecx, -1 |
||
2416 | call add_disk_free_space |
||
2417 | pop ecx |
||
131 | diamond | 2418 | mov eax, edx |
2419 | cmp [hd_error], 0 |
||
2420 | jnz .device_err3 |
||
2421 | add [edi+28], ebp |
||
2422 | jmp .extend_loop |
||
2423 | .extend_done: |
||
2424 | mov [edi+28], ecx |
||
2425 | pop edx ebp |
||
133 | diamond | 2426 | xor eax, eax ; CF=0 |
131 | diamond | 2427 | ret |
2428 | .device_err3: |
||
2429 | pop edx |
||
2430 | jmp .device_err2 |
||
2431 | .disk_full: |
||
2432 | pop eax edx ebp |
||
2433 | push ERROR_DISK_FULL |
||
2434 | pop eax |
||
2435 | cmp [hd_error], 0 |
||
2436 | jz @f |
||
2437 | mov al, 11 |
||
2438 | @@: stc |
||
2439 | ret |
||
2440 | |||
133 | diamond | 2441 | ;---------------------------------------------------------------- |
2442 | ; |
||
2443 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
2444 | ; |
||
2445 | ; esi points to filename |
||
2446 | ; ebx points to 64-bit number = new file size |
||
2447 | ; ecx ignored (reserved) |
||
2448 | ; edx ignored (reserved) |
||
2449 | ; |
||
2450 | ; ret eax = 0 ok or other = errormsg |
||
2451 | ; |
||
2452 | ;-------------------------------------------------------------- |
||
2453 | fs_HdSetFileEnd: |
||
256 | diamond | 2454 | cmp [fs_type], 1 |
2455 | jz ntfs_HdSetFileEnd |
||
2456 | cmp [fs_type], 16 |
||
2457 | jz @f |
||
2458 | cmp [fs_type], 32 |
||
2459 | jz @f |
||
133 | diamond | 2460 | push ERROR_UNKNOWN_FS |
2461 | .ret: |
||
2462 | pop eax |
||
2463 | ret |
||
2464 | @@: |
||
2465 | cmp byte [esi], 0 |
||
2466 | jnz @f |
||
2467 | .access_denied: |
||
2468 | push ERROR_ACCESS_DENIED |
||
2469 | jmp .ret |
||
2470 | @@: |
||
2471 | push edi |
||
2472 | call hd_find_lfn |
||
2473 | pushfd |
||
2474 | cmp [hd_error], 0 |
||
2475 | jz @f |
||
2476 | popfd |
||
2477 | push 11 |
||
2478 | jmp .ret |
||
2479 | @@: |
||
2480 | popfd |
||
2481 | jnc @f |
||
2482 | pop edi |
||
2483 | push ERROR_FILE_NOT_FOUND |
||
2484 | jmp .ret |
||
2485 | @@: |
||
2486 | ; must not be directory |
||
2487 | test byte [edi+11], 10h |
||
2488 | jz @f |
||
2489 | pop edi |
||
2490 | jmp .access_denied |
||
2491 | @@: |
||
2492 | ; file size must not exceed 4 Gb |
||
2493 | cmp dword [ebx+4], 0 |
||
2494 | jz @f |
||
2495 | pop edi |
||
2496 | push ERROR_END_OF_FILE |
||
2497 | jmp .ret |
||
2498 | @@: |
||
2499 | push eax ; save directory sector |
||
2500 | ; set file modification date/time to current |
||
2501 | call fat_update_datetime |
||
2502 | mov eax, [ebx] |
||
2503 | cmp eax, [edi+28] |
||
2504 | jb .truncate |
||
2505 | ja .expand |
||
2506 | pop eax |
||
2507 | mov ebx, buffer |
||
2508 | call hd_write |
||
2509 | pop edi |
||
2510 | xor eax, eax |
||
2511 | cmp [hd_error], 0 |
||
2512 | jz @f |
||
2513 | mov al, 11 |
||
2514 | @@: |
||
2515 | ret |
||
2516 | .expand: |
||
2517 | push ebx ebp ecx |
||
2518 | push dword [edi+28] ; save old size |
||
2519 | mov ecx, eax |
||
2520 | call hd_extend_file |
||
2521 | push eax ; return code |
||
2522 | jnc .expand_ok |
||
2523 | cmp al, ERROR_DISK_FULL |
||
2524 | jz .disk_full |
||
2525 | .pop_ret: |
||
2526 | call update_disk |
||
2527 | pop eax ecx ebp ebx ecx edi edi |
||
2528 | ret |
||
2529 | .expand_ok: |
||
2530 | .disk_full: |
||
2531 | ; save directory |
||
2532 | mov eax, [edi+28] |
||
2533 | xchg eax, [esp+20] |
||
2534 | mov ebx, buffer |
||
2535 | call hd_write |
||
2536 | mov eax, [edi+20-2] |
||
2537 | mov ax, [edi+26] |
||
2538 | mov edi, eax |
||
2539 | cmp [hd_error], 0 |
||
2540 | jz @f |
||
2541 | .pop_ret11: |
||
2542 | mov byte [esp], 11 |
||
2543 | jmp .pop_ret |
||
2544 | @@: |
||
2545 | ; now zero new data |
||
2546 | xor ebp, ebp |
||
2547 | ; edi=current cluster, ebp=sector in cluster |
||
2548 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
||
2549 | .zero_loop: |
||
2550 | sub dword [esp+4], 0x200 |
||
2551 | jae .next_cluster |
||
2552 | lea eax, [edi-2] |
||
2553 | imul eax, [SECTORS_PER_CLUSTER] |
||
2554 | add eax, [DATA_START] |
||
2555 | add eax, ebp |
||
2556 | cmp dword [esp+4], -0x200 |
||
2557 | jz .noread |
||
2558 | mov ebx, buffer |
||
2559 | call hd_read |
||
2560 | cmp [hd_error], 0 |
||
2561 | jnz .err_next |
||
2562 | .noread: |
||
2563 | mov ecx, [esp+4] |
||
2564 | neg ecx |
||
2565 | push edi |
||
2566 | mov edi, buffer+0x200 |
||
2567 | add edi, [esp+8] |
||
2568 | push eax |
||
2569 | xor eax, eax |
||
2570 | mov [esp+12], eax |
||
2571 | rep stosb |
||
2572 | pop eax |
||
2573 | pop edi |
||
2574 | call hd_write |
||
2575 | cmp [hd_error], 0 |
||
2576 | jz .next_cluster |
||
2577 | .err_next: |
||
2578 | mov byte [esp], 11 |
||
2579 | .next_cluster: |
||
2580 | sub dword [esp+20], 0x200 |
||
2581 | jbe .pop_ret |
||
2582 | inc ebp |
||
2583 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2584 | jb .zero_loop |
||
2585 | xor ebp, ebp |
||
2586 | mov eax, edi |
||
2587 | call get_FAT |
||
2588 | mov edi, eax |
||
2589 | cmp [hd_error], 0 |
||
2590 | jnz .pop_ret11 |
||
2591 | jmp .zero_loop |
||
2592 | .truncate: |
||
2593 | mov [edi+28], eax |
||
2594 | push ecx |
||
2595 | mov ecx, [edi+20-2] |
||
2596 | mov cx, [edi+26] |
||
2597 | push eax |
||
2598 | test eax, eax |
||
2599 | jz .zero_size |
||
2600 | ; find new last cluster |
||
2601 | @@: |
||
2602 | mov eax, [SECTORS_PER_CLUSTER] |
||
2603 | shl eax, 9 |
||
2604 | sub [esp], eax |
||
2605 | jbe @f |
||
2606 | mov eax, ecx |
||
2607 | call get_FAT |
||
2608 | mov ecx, eax |
||
2609 | cmp [hd_error], 0 |
||
2610 | jz @b |
||
2611 | .device_err3: |
||
2612 | pop eax ecx eax edi |
||
2613 | push 11 |
||
2614 | pop eax |
||
2615 | ret |
||
2616 | @@: |
||
2617 | ; we will zero data at the end of last sector - remember it |
||
2618 | push ecx |
||
2619 | ; terminate FAT chain |
||
2620 | push edx |
||
2621 | mov eax, ecx |
||
2622 | mov edx, [fatEND] |
||
2623 | call set_FAT |
||
2624 | mov eax, edx |
||
2625 | pop edx |
||
2626 | cmp [hd_error], 0 |
||
2627 | jz @f |
||
2628 | .device_err4: |
||
2629 | pop ecx |
||
2630 | jmp .device_err3 |
||
2631 | .zero_size: |
||
2632 | and word [edi+20], 0 |
||
2633 | and word [edi+26], 0 |
||
2634 | push 0 |
||
2635 | mov eax, ecx |
||
2636 | @@: |
||
2637 | ; delete FAT chain |
||
2638 | call clear_cluster_chain |
||
2639 | cmp [hd_error], 0 |
||
2640 | jnz .device_err4 |
||
2641 | ; save directory |
||
2642 | mov eax, [esp+12] |
||
2643 | push ebx |
||
2644 | mov ebx, buffer |
||
2645 | call hd_write |
||
2646 | pop ebx |
||
2647 | cmp [hd_error], 0 |
||
2648 | jnz .device_err4 |
||
2649 | ; zero last sector, ignore errors |
||
2650 | pop ecx |
||
2651 | pop eax |
||
2652 | dec ecx |
||
2653 | imul ecx, [SECTORS_PER_CLUSTER] |
||
2654 | add ecx, [DATA_START] |
||
2655 | push eax |
||
2656 | sar eax, 9 |
||
2657 | add ecx, eax |
||
2658 | pop eax |
||
2659 | and eax, 0x1FF |
||
2660 | jz .truncate_done |
||
2661 | push ebx eax |
||
2662 | mov eax, ecx |
||
2663 | mov ebx, buffer |
||
2664 | call hd_read |
||
2665 | pop eax |
||
2666 | lea edi, [buffer+eax] |
||
2667 | push ecx |
||
2668 | mov ecx, 0x200 |
||
2669 | sub ecx, eax |
||
2670 | xor eax, eax |
||
2671 | rep stosb |
||
2672 | pop eax |
||
2673 | call hd_write |
||
2674 | pop ebx |
||
2675 | .truncate_done: |
||
2676 | pop ecx eax edi |
||
2677 | call update_disk |
||
2678 | xor eax, eax |
||
2679 | cmp [hd_error], 0 |
||
2680 | jz @f |
||
2681 | mov al, 11 |
||
2682 | @@: |
||
2683 | ret |
||
2684 | |||
86 | diamond | 2685 | fs_HdGetFileInfo: |
256 | diamond | 2686 | cmp [fs_type], 1 |
2687 | jz ntfs_HdGetFileInfo |
||
2688 | cmp [fs_type], 16 |
||
2689 | jz @f |
||
2690 | cmp [fs_type], 32 |
||
2691 | jz @f |
||
86 | diamond | 2692 | mov eax, ERROR_UNKNOWN_FS |
2693 | ret |
||
2694 | @@: |
||
2695 | cmp byte [esi], 0 |
||
2696 | jnz @f |
||
2697 | mov eax, 2 |
||
2698 | ret |
||
2699 | @@: |
||
2700 | push edi |
||
2701 | call hd_find_lfn |
||
2702 | pushfd |
||
2703 | cmp [hd_error], 0 |
||
2704 | jz @f |
||
2705 | popfd |
||
2706 | pop edi |
||
2707 | mov eax, 11 |
||
2708 | ret |
||
2709 | @@: |
||
2710 | popfd |
||
2711 | jmp fs_GetFileInfo_finish |
||
2712 | |||
2713 | fs_HdSetFileInfo: |
||
256 | diamond | 2714 | cmp [fs_type], 1 |
2715 | jz ntfs_HdSetFileInfo |
||
2716 | cmp [fs_type], 16 |
||
2717 | jz @f |
||
2718 | cmp [fs_type], 32 |
||
2719 | jz @f |
||
86 | diamond | 2720 | mov eax, ERROR_UNKNOWN_FS |
2721 | ret |
||
2722 | @@: |
||
2723 | cmp byte [esi], 0 |
||
2724 | jnz @f |
||
2725 | mov eax, 2 |
||
2726 | ret |
||
2727 | @@: |
||
2728 | push edi |
||
2729 | call hd_find_lfn |
||
2730 | pushfd |
||
2731 | cmp [hd_error], 0 |
||
2732 | jz @f |
||
2733 | popfd |
||
2734 | pop edi |
||
2735 | mov eax, 11 |
||
2736 | ret |
||
2737 | @@: |
||
2738 | popfd |
||
2739 | jnc @f |
||
2740 | pop edi |
||
2741 | mov eax, ERROR_FILE_NOT_FOUND |
||
2742 | ret |
||
2743 | @@: |
||
2744 | push eax |
||
2745 | call bdfe_to_fat_entry |
||
2746 | pop eax |
||
2747 | mov ebx, buffer |
||
2748 | call hd_write |
||
2749 | call update_disk |
||
2750 | pop edi |
||
2751 | xor eax, eax |
||
2752 | ret |
||
2753 | |||
91 | diamond | 2754 | ;---------------------------------------------------------------- |
2755 | ; |
||
171 | diamond | 2756 | ; fs_HdDelete - delete file or empty folder from hard disk |
2757 | ; |
||
2758 | ; esi points to filename |
||
2759 | ; |
||
2760 | ; ret eax = 0 ok or other = errormsg |
||
2761 | ; |
||
2762 | ;-------------------------------------------------------------- |
||
2763 | fs_HdDelete: |
||
256 | diamond | 2764 | cmp [fs_type], 1 |
2765 | jz ntfs_HdDelete |
||
2766 | cmp [fs_type], 16 |
||
2767 | jz @f |
||
2768 | cmp [fs_type], 32 |
||
2769 | jz @f |
||
171 | diamond | 2770 | push ERROR_UNKNOWN_FS |
2771 | .pop_ret: |
||
2772 | pop eax |
||
2773 | ret |
||
2774 | @@: |
||
2775 | cmp byte [esi], 0 |
||
2776 | jnz @f |
||
2777 | ; cannot delete root! |
||
2778 | .access_denied: |
||
2779 | push ERROR_ACCESS_DENIED |
||
2780 | jmp .pop_ret |
||
2781 | @@: |
||
2782 | and [longname_sec1], 0 |
||
2783 | and [longname_sec2], 0 |
||
2784 | push edi |
||
2785 | call hd_find_lfn |
||
2786 | jnc .found |
||
2787 | pop edi |
||
2788 | push ERROR_FILE_NOT_FOUND |
||
2789 | jmp .pop_ret |
||
2790 | .found: |
||
2791 | cmp dword [edi], '. ' |
||
2792 | jz .access_denied2 |
||
2793 | cmp dword [edi], '.. ' |
||
2794 | jz .access_denied2 |
||
2795 | test byte [edi+11], 10h |
||
2796 | jz .dodel |
||
2797 | ; we can delete only empty folders! |
||
2798 | pushad |
||
2799 | mov ebp, [edi+20-2] |
||
2800 | mov bp, [edi+26] |
||
2801 | xor ecx, ecx |
||
2802 | lea eax, [ebp-2] |
||
2803 | imul eax, [SECTORS_PER_CLUSTER] |
||
2804 | add eax, [DATA_START] |
||
2805 | mov ebx, buffer |
||
2806 | call hd_read |
||
2807 | cmp [hd_error], 0 |
||
2808 | jnz .err1 |
||
2809 | add ebx, 2*0x20 |
||
2810 | .checkempty: |
||
2811 | cmp byte [ebx], 0 |
||
2812 | jz .empty |
||
2813 | cmp byte [ebx], 0xE5 |
||
2814 | jnz .notempty |
||
2815 | add ebx, 0x20 |
||
2816 | cmp ebx, buffer+0x200 |
||
2817 | jb .checkempty |
||
2818 | inc ecx |
||
2819 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
2820 | jb @f |
||
2821 | mov eax, ebp |
||
2822 | call get_FAT |
||
2823 | cmp [hd_error], 0 |
||
2824 | jnz .err1 |
||
2825 | mov ebp, eax |
||
2826 | xor ecx, ecx |
||
2827 | @@: |
||
2828 | lea eax, [ebp-2] |
||
2829 | imul eax, [SECTORS_PER_CLUSTER] |
||
2830 | add eax, [DATA_START] |
||
2831 | add eax, ecx |
||
2832 | mov ebx, buffer |
||
2833 | call hd_read |
||
2834 | cmp [hd_error], 0 |
||
2835 | jz .checkempty |
||
2836 | .err1: |
||
2837 | popad |
||
2838 | .err2: |
||
2839 | pop edi |
||
2840 | push 11 |
||
2841 | pop eax |
||
2842 | ret |
||
2843 | .notempty: |
||
2844 | popad |
||
2845 | .access_denied2: |
||
2846 | pop edi |
||
2847 | push ERROR_ACCESS_DENIED |
||
2848 | pop eax |
||
2849 | ret |
||
2850 | .empty: |
||
2851 | popad |
||
2852 | push ebx |
||
2853 | mov ebx, buffer |
||
2854 | call hd_read |
||
2855 | pop ebx |
||
2856 | cmp [hd_error], 0 |
||
2857 | jnz .err2 |
||
2858 | .dodel: |
||
2859 | push eax |
||
2860 | mov eax, [edi+20-2] |
||
2861 | mov ax, [edi+26] |
||
2862 | xchg eax, [esp] |
||
2863 | ; delete folder entry |
||
2864 | mov byte [edi], 0xE5 |
||
2865 | ; delete LFN (if present) |
||
2866 | .lfndel: |
||
2867 | cmp edi, buffer |
||
2868 | ja @f |
||
2869 | cmp [longname_sec2], 0 |
||
2870 | jz .lfndone |
||
2871 | push [longname_sec2] |
||
2872 | push [longname_sec1] |
||
2873 | pop [longname_sec2] |
||
2874 | and [longname_sec1], 0 |
||
2875 | push ebx |
||
2876 | mov ebx, buffer |
||
2877 | call hd_write |
||
2878 | mov eax, [esp+4] |
||
2879 | call hd_read |
||
2880 | pop ebx |
||
2881 | pop eax |
||
2882 | mov edi, buffer+0x200 |
||
2883 | @@: |
||
2884 | sub edi, 0x20 |
||
2885 | cmp byte [edi], 0xE5 |
||
2886 | jz .lfndone |
||
2887 | cmp byte [edi+11], 0xF |
||
2888 | jnz .lfndone |
||
2889 | mov byte [edi], 0xE5 |
||
2890 | jmp .lfndel |
||
2891 | .lfndone: |
||
2892 | push ebx |
||
2893 | mov ebx, buffer |
||
2894 | call hd_write |
||
2895 | pop ebx |
||
2896 | ; delete FAT chain |
||
2897 | pop eax |
||
2898 | call clear_cluster_chain |
||
2899 | call update_disk |
||
2900 | pop edi |
||
2901 | xor eax, eax |
||
2902 | cmp [hd_error], 0 |
||
2903 | jz @f |
||
2904 | mov al, 11 |
||
2905 | @@: |
||
2906 | ret |
||
2907 | |||
74 | mario79 | 2908 | ; \end{diamond}=>=>>> |