Rev 2434 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
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495 | diamond | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
465 | serge | 2 | ;; ;; |
2465 | Serge | 3 | ;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;; |
495 | diamond | 4 | ;; Distributed under terms of the GNU General Public License ;; |
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: 2465 $ |
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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2130 | serge | 63 | ERROR_DEVICE = 11 |
1 | ha | 64 | |
65 | PUSHAD_EAX equ [esp+28] |
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66 | PUSHAD_ECX equ [esp+24] |
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67 | PUSHAD_EDX equ [esp+20] |
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68 | PUSHAD_EBX equ [esp+16] |
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69 | PUSHAD_EBP equ [esp+8] |
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70 | PUSHAD_ESI equ [esp+4] |
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71 | PUSHAD_EDI equ [esp+0] |
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72 | |||
171 | diamond | 73 | uglobal |
74 | align 4 |
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1 | ha | 75 | partition_count dd 0 ; partitions found by set_FAT32_variables |
76 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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77 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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78 | |||
79 | hd_error dd 0 ; set by wait_for_sector_buffer |
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80 | hd_setup dd 0 |
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81 | hd_wait_timeout dd 0 |
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82 | |||
83 | cluster_tmp dd 0 ; used by analyze_directory |
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84 | ; and analyze_directory_to_write |
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85 | |||
86 | file_size dd 0 ; used by file_read |
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87 | |||
88 | cache_search_start dd 0 ; used by find_empty_slot |
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171 | diamond | 89 | endg |
1 | ha | 90 | |
171 | diamond | 91 | iglobal |
1 | ha | 92 | fat_in_cache dd -1 |
171 | diamond | 93 | endg |
1 | ha | 94 | |
95 | uglobal |
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171 | diamond | 96 | align 4 |
2434 | Serge | 97 | fat_cache: |
98 | times 512 db 0 |
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1 | ha | 99 | Sector512: ; label for dev_hdcd.inc |
2434 | Serge | 100 | buffer: |
101 | times 512 db 0 |
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102 | fsinfo_buffer: |
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103 | times 512 db 0 |
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1 | ha | 104 | endg |
105 | |||
106 | uglobal |
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107 | fat16_root db 0 ; flag for fat16 rootdir |
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108 | fat_change db 0 ; 1=fat has changed |
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109 | endg |
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110 | |||
111 | reserve_hd1: |
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112 | |||
2434 | Serge | 113 | cli |
114 | cmp [hd1_status], 0 |
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115 | je reserve_ok1 |
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1 | ha | 116 | |
2434 | Serge | 117 | sti |
118 | call change_task |
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119 | jmp reserve_hd1 |
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1 | ha | 120 | |
121 | reserve_ok1: |
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122 | |||
2434 | Serge | 123 | push eax |
124 | mov eax, [CURRENT_TASK] |
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125 | shl eax, 5 |
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126 | mov eax, [eax+CURRENT_TASK+TASKDATA.pid] |
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127 | mov [hd1_status], eax |
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128 | pop eax |
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129 | sti |
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130 | ret |
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95 | mario79 | 131 | ;******************************************** |
321 | diamond | 132 | |
133 | uglobal |
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134 | hd_in_cache db ? |
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135 | endg |
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136 | |||
95 | mario79 | 137 | reserve_hd_channel: |
709 | diamond | 138 | ; BIOS disk accesses are protected with common mutex hd1_status |
139 | ; This must be modified when hd1_status will not be valid! |
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140 | cmp [hdpos], 0x80 |
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141 | jae .ret |
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2434 | Serge | 142 | cmp [hdbase], 0x1F0 |
143 | jne .IDE_Channel_2 |
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95 | mario79 | 144 | .IDE_Channel_1: |
2434 | Serge | 145 | cli |
146 | cmp [IDE_Channel_1], 0 |
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147 | je .reserve_ok_1 |
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148 | sti |
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149 | call change_task |
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150 | jmp .IDE_Channel_1 |
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95 | mario79 | 151 | .IDE_Channel_2: |
2434 | Serge | 152 | cli |
153 | cmp [IDE_Channel_2], 0 |
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154 | je .reserve_ok_2 |
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155 | sti |
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156 | call change_task |
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157 | jmp .IDE_Channel_2 |
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95 | mario79 | 158 | .reserve_ok_1: |
321 | diamond | 159 | mov [IDE_Channel_1], 1 |
160 | push eax |
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161 | mov al, 1 |
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162 | jmp @f |
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95 | mario79 | 163 | .reserve_ok_2: |
321 | diamond | 164 | mov [IDE_Channel_2], 1 |
165 | push eax |
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166 | mov al, 3 |
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167 | @@: |
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168 | cmp [hdid], 1 |
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169 | sbb al, -1 |
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170 | cmp al, [hd_in_cache] |
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171 | jz @f |
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172 | mov [hd_in_cache], al |
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173 | call clear_hd_cache |
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174 | @@: |
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2434 | Serge | 175 | pop eax |
176 | sti |
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709 | diamond | 177 | .ret: |
321 | diamond | 178 | ret |
179 | |||
95 | mario79 | 180 | free_hd_channel: |
709 | diamond | 181 | ; see comment at reserve_hd_channel |
182 | cmp [hdpos], 0x80 |
||
183 | jae .ret |
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2434 | Serge | 184 | cmp [hdbase], 0x1F0 |
185 | jne .IDE_Channel_2 |
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95 | mario79 | 186 | .IDE_Channel_1: |
2434 | Serge | 187 | mov [IDE_Channel_1], 0 |
709 | diamond | 188 | .ret: |
2434 | Serge | 189 | ret |
95 | mario79 | 190 | .IDE_Channel_2: |
2434 | Serge | 191 | mov [IDE_Channel_2], 0 |
192 | ret |
||
95 | mario79 | 193 | ;******************************************** |
379 | serge | 194 | problem_partition db 0 ; used for partitions search |
1 | ha | 195 | |
65 | mario79 | 196 | include 'part_set.inc' |
1 | ha | 197 | |
198 | set_FAT: |
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199 | ;-------------------------------- |
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200 | ; input : EAX = cluster |
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201 | ; EDX = value to save |
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202 | ; output : EDX = old value |
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203 | ;-------------------------------- |
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2434 | Serge | 204 | push eax ebx esi |
1 | ha | 205 | |
2434 | Serge | 206 | cmp eax, 2 |
207 | jb sfc_error |
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208 | cmp eax, [LAST_CLUSTER] |
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209 | ja sfc_error |
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210 | cmp [fs_type], 16 |
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211 | je sfc_1 |
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212 | add eax, eax |
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1 | ha | 213 | sfc_1: |
2434 | Serge | 214 | add eax, eax |
215 | mov esi, 511 |
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216 | and esi, eax ; esi = position in fat sector |
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217 | shr eax, 9 ; eax = fat sector |
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218 | add eax, [FAT_START] |
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219 | mov ebx, fat_cache |
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1 | ha | 220 | |
2434 | Serge | 221 | cmp eax, [fat_in_cache]; is fat sector already in memory? |
222 | je sfc_in_cache ; yes |
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1 | ha | 223 | |
2434 | Serge | 224 | cmp [fat_change], 0 ; is fat changed? |
225 | je sfc_no_change ; no |
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226 | call write_fat_sector; yes. write it into disk |
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227 | cmp [hd_error], 0 |
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228 | jne sfc_error |
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1 | ha | 229 | |
230 | sfc_no_change: |
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2434 | Serge | 231 | mov [fat_in_cache], eax; save fat sector |
232 | call hd_read |
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233 | cmp [hd_error], 0 |
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234 | jne sfc_error |
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1 | ha | 235 | |
379 | serge | 236 | |
1 | ha | 237 | sfc_in_cache: |
2434 | Serge | 238 | cmp [fs_type], 16 |
239 | jne sfc_test32 |
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1 | ha | 240 | |
241 | sfc_set16: |
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2434 | Serge | 242 | xchg [ebx+esi], dx ; save new value and get old value |
243 | jmp sfc_write |
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1 | ha | 244 | |
245 | sfc_test32: |
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2434 | Serge | 246 | mov eax, [fatMASK] |
1 | ha | 247 | |
248 | sfc_set32: |
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2434 | Serge | 249 | and edx, eax |
250 | xor eax, -1 ; mask for high bits |
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251 | and eax, [ebx+esi] ; get high 4 bits |
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252 | or eax, edx |
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253 | mov edx, [ebx+esi] ; get old value |
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254 | mov [ebx+esi], eax ; save new value |
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1 | ha | 255 | |
256 | sfc_write: |
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2434 | Serge | 257 | mov [fat_change], 1 ; fat has changed |
1 | ha | 258 | |
259 | sfc_nonzero: |
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2434 | Serge | 260 | and edx, [fatMASK] |
1 | ha | 261 | |
262 | sfc_error: |
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2434 | Serge | 263 | pop esi ebx eax |
264 | ret |
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1 | ha | 265 | |
266 | |||
267 | get_FAT: |
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268 | ;-------------------------------- |
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269 | ; input : EAX = cluster |
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270 | ; output : EAX = next cluster |
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271 | ;-------------------------------- |
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2434 | Serge | 272 | push ebx esi |
1 | ha | 273 | |
2434 | Serge | 274 | cmp [fs_type], 16 |
275 | je gfc_1 |
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276 | add eax, eax |
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1 | ha | 277 | gfc_1: |
2434 | Serge | 278 | add eax, eax |
279 | mov esi, 511 |
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280 | and esi, eax ; esi = position in fat sector |
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281 | shr eax, 9 ; eax = fat sector |
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282 | add eax, [FAT_START] |
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283 | mov ebx, fat_cache |
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1 | ha | 284 | |
2434 | Serge | 285 | cmp eax, [fat_in_cache]; is fat sector already in memory? |
286 | je gfc_in_cache |
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1 | ha | 287 | |
2434 | Serge | 288 | cmp [fat_change], 0 ; is fat changed? |
289 | je gfc_no_change ; no |
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290 | call write_fat_sector; yes. write it into disk |
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291 | cmp [hd_error], 0 |
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292 | jne hd_error_01 |
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1 | ha | 293 | |
294 | gfc_no_change: |
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2434 | Serge | 295 | mov [fat_in_cache], eax |
296 | call hd_read |
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297 | cmp [hd_error], 0 |
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298 | jne hd_error_01 |
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1 | ha | 299 | |
300 | gfc_in_cache: |
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2434 | Serge | 301 | mov eax, [ebx+esi] |
302 | and eax, [fatMASK] |
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74 | mario79 | 303 | hd_error_01: |
2434 | Serge | 304 | pop esi ebx |
305 | ret |
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1 | ha | 306 | |
307 | |||
308 | get_free_FAT: |
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309 | ;----------------------------------------------------------- |
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310 | ; output : if CARRY=0 EAX = # first cluster found free |
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311 | ; if CARRY=1 disk full |
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312 | ; Note : for more speed need to use fat_cache directly |
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313 | ;----------------------------------------------------------- |
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2434 | Serge | 314 | push ecx |
315 | mov ecx, [LAST_CLUSTER]; counter for full disk |
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316 | sub ecx, 2 |
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317 | mov eax, [fatStartScan] |
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318 | cmp eax, 2 |
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319 | jb gff_reset |
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1 | ha | 320 | |
321 | gff_test: |
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2434 | Serge | 322 | cmp eax, [LAST_CLUSTER]; if above last cluster start at cluster 2 |
323 | jbe gff_in_range |
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649 | diamond | 324 | gff_reset: |
2434 | Serge | 325 | mov eax, 2 |
1 | ha | 326 | |
327 | gff_in_range: |
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2434 | Serge | 328 | push eax |
329 | call get_FAT ; get cluster state |
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330 | cmp [hd_error], 0 |
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331 | jne gff_not_found_1 |
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74 | mario79 | 332 | |
2434 | Serge | 333 | test eax, eax ; is it free? |
334 | pop eax |
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335 | je gff_found ; yes |
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336 | inc eax ; next cluster |
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337 | dec ecx ; is all checked? |
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338 | jns gff_test ; no |
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1 | ha | 339 | |
74 | mario79 | 340 | gff_not_found_1: |
2434 | Serge | 341 | add esp, 4 |
1 | ha | 342 | gff_not_found: |
2434 | Serge | 343 | pop ecx ; yes. disk is full |
344 | stc |
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345 | ret |
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1 | ha | 346 | |
347 | gff_found: |
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2434 | Serge | 348 | lea ecx, [eax+1] |
349 | mov [fatStartScan], ecx |
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350 | pop ecx |
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351 | clc |
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352 | ret |
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1 | ha | 353 | |
354 | |||
355 | write_fat_sector: |
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356 | ;----------------------------------------------------------- |
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357 | ; write changed fat to disk |
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358 | ;----------------------------------------------------------- |
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2434 | Serge | 359 | push eax ebx ecx |
1 | ha | 360 | |
2434 | Serge | 361 | mov [fat_change], 0 |
362 | mov eax, [fat_in_cache] |
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363 | cmp eax, -1 |
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364 | jz write_fat_not_used |
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365 | mov ebx, fat_cache |
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366 | mov ecx, [NUMBER_OF_FATS] |
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1 | ha | 367 | |
368 | write_next_fat: |
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2434 | Serge | 369 | call hd_write |
370 | cmp [hd_error], 0 |
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371 | jne write_fat_not_used |
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74 | mario79 | 372 | |
2434 | Serge | 373 | add eax, [SECTORS_PER_FAT] |
374 | dec ecx |
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375 | jnz write_next_fat |
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1 | ha | 376 | |
377 | write_fat_not_used: |
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2434 | Serge | 378 | pop ecx ebx eax |
379 | ret |
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1 | ha | 380 | |
381 | |||
382 | analyze_directory: |
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383 | ;----------------------------------------------------------- |
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384 | ; input : EAX = first cluster of the directory |
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385 | ; EBX = pointer to filename |
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386 | ; output : IF CARRY=0 EAX = sector where th file is found |
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387 | ; EBX = pointer in buffer |
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388 | ; [buffer .. buffer+511] |
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389 | ; ECX,EDX,ESI,EDI not changed |
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390 | ; IF CARRY=1 filename not found |
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391 | ; Note : if cluster=0 it's changed to read rootdir |
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392 | ; save 2 previous directory sectors in longname_sec |
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393 | ;----------------------------------------------------------- |
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2434 | Serge | 394 | push ecx edx esi edi ebx; ebx = [esp+0] |
395 | mov [longname_sec1], 0 |
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396 | mov [longname_sec2], 0 |
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1 | ha | 397 | |
398 | adr_new_cluster: |
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2434 | Serge | 399 | mov [cluster_tmp], eax |
400 | mov [fat16_root], 0 |
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401 | cmp eax, [LAST_CLUSTER] |
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402 | ja adr_not_found ; too big cluster number, something is wrong |
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403 | cmp eax, 2 |
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404 | jnb adr_data_cluster |
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1 | ha | 405 | |
2434 | Serge | 406 | mov eax, [ROOT_CLUSTER]; if cluster < 2 then read rootdir |
407 | cmp [fs_type], 16 |
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408 | jne adr_data_cluster |
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409 | mov eax, [ROOT_START] |
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410 | mov edx, [ROOT_SECTORS] |
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411 | mov [fat16_root], 1 ; flag for fat16 rootdir |
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412 | jmp adr_new_sector |
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1 | ha | 413 | |
414 | adr_data_cluster: |
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2434 | Serge | 415 | sub eax, 2 |
416 | mov edx, [SECTORS_PER_CLUSTER] |
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417 | imul eax, edx |
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418 | add eax, [DATA_START] |
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1 | ha | 419 | |
420 | adr_new_sector: |
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2434 | Serge | 421 | mov ebx, buffer |
422 | call hd_read |
||
423 | cmp [hd_error], 0 |
||
424 | jne adr_not_found |
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74 | mario79 | 425 | |
2434 | Serge | 426 | mov ecx, 512/32 ; count of dir entrys per sector = 16 |
1 | ha | 427 | |
428 | adr_analyze: |
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2434 | Serge | 429 | mov edi, [ebx+11] ; file attribute |
430 | and edi, 0xf |
||
431 | cmp edi, 0xf |
||
432 | je adr_long_filename |
||
433 | test edi, 0x8 ; skip over volume label |
||
434 | jne adr_long_filename; Note: label can be same name as file/dir |
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1 | ha | 435 | |
2434 | Serge | 436 | mov esi, [esp+0] ; filename need to be uppercase |
437 | mov edi, ebx |
||
438 | push ecx |
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439 | mov ecx, 11 |
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440 | cld |
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441 | rep cmpsb ; compare 8+3 filename |
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442 | pop ecx |
||
443 | je adr_found |
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1 | ha | 444 | |
445 | adr_long_filename: |
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2434 | Serge | 446 | add ebx, 32 ; position of next dir entry |
447 | dec ecx |
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448 | jnz adr_analyze |
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1 | ha | 449 | |
2434 | Serge | 450 | mov ecx, [longname_sec1]; save 2 previous directory sectors |
451 | mov [longname_sec1], eax; for delete long filename |
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452 | mov [longname_sec2], ecx |
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453 | inc eax ; next sector |
||
454 | dec edx |
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455 | jne adr_new_sector |
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456 | cmp [fat16_root], 1 ; end of fat16 rootdir |
||
457 | je adr_not_found |
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1 | ha | 458 | |
459 | adr_next_cluster: |
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2434 | Serge | 460 | mov eax, [cluster_tmp] |
461 | call get_FAT ; get next cluster |
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462 | cmp [hd_error], 0 |
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463 | jne adr_not_found |
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74 | mario79 | 464 | |
2434 | Serge | 465 | cmp eax, 2 ; incorrect fat chain? |
466 | jb adr_not_found ; yes |
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467 | cmp eax, [fatRESERVED]; is it end of directory? |
||
468 | jb adr_new_cluster ; no. analyse it |
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1 | ha | 469 | |
470 | adr_not_found: |
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2434 | Serge | 471 | pop edi edi esi edx ecx; first edi will remove ebx |
472 | stc ; file not found |
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473 | ret |
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1 | ha | 474 | |
475 | adr_found: |
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2434 | Serge | 476 | pop edi edi esi edx ecx; first edi will remove ebx |
477 | clc ; file found |
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478 | ret |
||
1 | ha | 479 | |
480 | |||
481 | get_data_cluster: |
||
482 | ;----------------------------------------------------------- |
||
483 | ; input : EAX = cluster |
||
484 | ; EBX = pointer to buffer |
||
485 | ; EDX = # blocks to read in buffer |
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486 | ; ESI = # blocks to skip over |
||
487 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
488 | ; if CARRY=1 cluster out of range |
||
489 | ; Note : if cluster=0 it's changed to read rootdir |
||
490 | ;----------------------------------------------------------- |
||
2434 | Serge | 491 | push eax ecx |
1 | ha | 492 | |
2434 | Serge | 493 | mov [fat16_root], 0 |
494 | cmp eax, [LAST_CLUSTER] |
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495 | ja gdc_error ; too big cluster number, something is wrong |
||
496 | cmp eax, 2 |
||
497 | jnb gdc_cluster |
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1 | ha | 498 | |
2434 | Serge | 499 | mov eax, [ROOT_CLUSTER]; if cluster < 2 then read rootdir |
500 | cmp [fs_type], 16 |
||
501 | jne gdc_cluster |
||
502 | mov eax, [ROOT_START] |
||
503 | mov ecx, [ROOT_SECTORS]; Note: not cluster size |
||
504 | mov [fat16_root], 1 ; flag for fat16 rootdir |
||
505 | jmp gdc_read |
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1 | ha | 506 | |
507 | gdc_cluster: |
||
2434 | Serge | 508 | sub eax, 2 |
509 | mov ecx, [SECTORS_PER_CLUSTER] |
||
510 | imul eax, ecx |
||
511 | add eax, [DATA_START] |
||
1 | ha | 512 | |
513 | gdc_read: |
||
2434 | Serge | 514 | test esi, esi ; first wanted block |
515 | je gdcl1 ; yes, skip count is 0 |
||
516 | dec esi |
||
517 | jmp gdcl2 |
||
1 | ha | 518 | |
519 | gdcl1: |
||
2434 | Serge | 520 | call hd_read |
521 | cmp [hd_error], 0 |
||
522 | jne gdc_error |
||
74 | mario79 | 523 | |
2434 | Serge | 524 | add ebx, 512 ; update pointer |
525 | dec edx |
||
1 | ha | 526 | |
527 | gdcl2: |
||
2434 | Serge | 528 | test edx, edx ; is all read? |
529 | je out_of_read |
||
1 | ha | 530 | |
2434 | Serge | 531 | inc eax ; next sector |
532 | dec ecx |
||
533 | jnz gdc_read |
||
1 | ha | 534 | |
535 | out_of_read: |
||
2434 | Serge | 536 | pop ecx eax |
537 | clc |
||
538 | ret |
||
1 | ha | 539 | |
540 | gdc_error: |
||
2434 | Serge | 541 | pop ecx eax |
542 | stc |
||
543 | ret |
||
1 | ha | 544 | |
545 | |||
546 | get_cluster_of_a_path: |
||
547 | ;--------------------------------------------------------- |
||
548 | ; input : EBX = pointer to a path string |
||
549 | ; (example: the path "/files/data/document" become |
||
550 | ; "files......data.......document...0" |
||
551 | ; '.' = space char |
||
552 | ; '0' = char(0) (ASCII=0) !!! ) |
||
553 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
554 | ; if (CARRY=0) -> EAX=cluster |
||
555 | ;--------------------------------------------------------- |
||
2434 | Serge | 556 | push ebx edx |
1 | ha | 557 | |
2434 | Serge | 558 | mov eax, [ROOT_CLUSTER] |
559 | mov edx, ebx |
||
1 | ha | 560 | |
561 | search_end_of_path: |
||
2434 | Serge | 562 | cmp byte [edx], 0 |
563 | je found_end_of_path |
||
1 | ha | 564 | |
2434 | Serge | 565 | inc edx; '/' |
566 | mov ebx, edx |
||
567 | call analyze_directory |
||
568 | jc directory_not_found |
||
1 | ha | 569 | |
2434 | Serge | 570 | mov eax, [ebx+20-2] ; read the HIGH 16bit cluster field |
571 | mov ax, [ebx+26] ; read the LOW 16bit cluster field |
||
572 | and eax, [fatMASK] |
||
573 | add edx, 11 ; 8+3 (name+extension) |
||
574 | jmp search_end_of_path |
||
1 | ha | 575 | |
576 | found_end_of_path: |
||
2434 | Serge | 577 | pop edx ebx |
578 | clc ; no errors |
||
579 | ret |
||
1 | ha | 580 | |
581 | directory_not_found: |
||
2434 | Serge | 582 | pop edx ebx |
583 | stc ; errors occour |
||
584 | ret |
||
1 | ha | 585 | |
586 | |||
587 | bcd2bin: |
||
588 | ;---------------------------------- |
||
589 | ; input : AL=BCD number (eg. 0x11) |
||
590 | ; output : AH=0 |
||
591 | ; AL=decimal number (eg. 11) |
||
592 | ;---------------------------------- |
||
2434 | Serge | 593 | xor ah, ah |
594 | shl ax, 4 |
||
595 | shr al, 4 |
||
596 | aad |
||
597 | ret |
||
1 | ha | 598 | |
599 | |||
600 | get_date_for_file: |
||
601 | ;----------------------------------------------------- |
||
602 | ; Get date from CMOS and pack day,month,year in AX |
||
603 | ; DATE bits 0..4 : day of month 0..31 |
||
604 | ; 5..8 : month of year 1..12 |
||
605 | ; 9..15 : count of years from 1980 |
||
606 | ;----------------------------------------------------- |
||
2434 | Serge | 607 | mov al, 0x7 ;day |
608 | out 0x70, al |
||
609 | in al, 0x71 |
||
610 | call bcd2bin |
||
611 | ror eax, 5 |
||
1 | ha | 612 | |
2434 | Serge | 613 | mov al, 0x8 ;month |
614 | out 0x70, al |
||
615 | in al, 0x71 |
||
616 | call bcd2bin |
||
617 | ror eax, 4 |
||
1 | ha | 618 | |
2434 | Serge | 619 | mov al, 0x9 ;year |
620 | out 0x70, al |
||
621 | in al, 0x71 |
||
622 | call bcd2bin |
||
623 | add ax, 20 ;because CMOS return only the two last |
||
1 | ha | 624 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
2434 | Serge | 625 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
626 | ret |
||
1 | ha | 627 | |
628 | |||
629 | get_time_for_file: |
||
630 | ;----------------------------------------------------- |
||
631 | ; Get time from CMOS and pack hour,minute,second in AX |
||
632 | ; TIME bits 0..4 : second (the low bit is lost) |
||
633 | ; 5..10 : minute 0..59 |
||
634 | ; 11..15 : hour 0..23 |
||
635 | ;----------------------------------------------------- |
||
2434 | Serge | 636 | mov al, 0x0 ;second |
637 | out 0x70, al |
||
638 | in al, 0x71 |
||
639 | call bcd2bin |
||
640 | ror eax, 6 |
||
1 | ha | 641 | |
2434 | Serge | 642 | mov al, 0x2 ;minute |
643 | out 0x70, al |
||
644 | in al, 0x71 |
||
645 | call bcd2bin |
||
646 | ror eax, 6 |
||
1 | ha | 647 | |
2434 | Serge | 648 | mov al, 0x4 ;hour |
649 | out 0x70, al |
||
650 | in al, 0x71 |
||
651 | call bcd2bin |
||
652 | rol eax, 11 |
||
653 | ret |
||
1 | ha | 654 | |
655 | |||
656 | set_current_time_for_entry: |
||
657 | ;----------------------------------------------------- |
||
658 | ; Set current time/date for file entry |
||
659 | ; input : ebx = file entry pointer |
||
660 | ;----------------------------------------------------- |
||
2434 | Serge | 661 | push eax |
662 | call get_time_for_file; update files date/time |
||
663 | mov [ebx+22], ax |
||
664 | call get_date_for_file |
||
665 | mov [ebx+24], ax |
||
666 | pop eax |
||
667 | ret |
||
1 | ha | 668 | |
669 | |||
670 | |||
671 | add_disk_free_space: |
||
672 | ;----------------------------------------------------- |
||
673 | ; input : ecx = cluster count |
||
674 | ; Note : negative = remove clusters from free space |
||
675 | ; positive = add clusters to free space |
||
676 | ;----------------------------------------------------- |
||
2434 | Serge | 677 | test ecx, ecx ; no change |
678 | je add_dfs_no |
||
679 | cmp [fs_type], 32 ; free disk space only used by fat32 |
||
680 | jne add_dfs_no |
||
1 | ha | 681 | |
2434 | Serge | 682 | push eax ebx |
683 | mov eax, [ADR_FSINFO] |
||
684 | mov ebx, fsinfo_buffer |
||
685 | call hd_read |
||
686 | cmp [hd_error], 0 |
||
687 | jne add_not_fs |
||
74 | mario79 | 688 | |
2434 | Serge | 689 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
690 | jne add_not_fs |
||
1 | ha | 691 | |
2434 | Serge | 692 | add [ebx+0x1e8], ecx |
693 | push [fatStartScan] |
||
694 | pop dword [ebx+0x1ec] |
||
695 | call hd_write |
||
133 | diamond | 696 | ; cmp [hd_error],0 |
697 | ; jne add_not_fs |
||
1 | ha | 698 | |
699 | add_not_fs: |
||
2434 | Serge | 700 | pop ebx eax |
1 | ha | 701 | |
702 | add_dfs_no: |
||
2434 | Serge | 703 | ret |
1 | ha | 704 | |
705 | |||
706 | file_read: |
||
707 | ;-------------------------------------------------------------------------- |
||
708 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
709 | ; |
||
710 | ; EAX EDI system call to write / |
||
711 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
712 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
713 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
714 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
715 | ; EDI ESI vt first 512 block to read |
||
716 | ; EDI if 0 - read root |
||
717 | ; |
||
718 | ; output : eax = 0 - ok |
||
719 | ; 3 - unknown FS |
||
720 | ; 5 - file not found |
||
721 | ; 6 - end of file |
||
722 | ; 9 - fat table corrupted |
||
74 | mario79 | 723 | ; 10 - access denied |
1 | ha | 724 | ; ebx = size of file/directory |
725 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 726 | cmp [fs_type], 16 |
727 | jz fat_ok_for_reading |
||
728 | cmp [fs_type], 32 |
||
729 | jz fat_ok_for_reading |
||
2434 | Serge | 730 | xor ebx, ebx |
731 | mov eax, ERROR_UNKNOWN_FS |
||
732 | mov [hd1_status], ebx |
||
733 | ret |
||
1 | ha | 734 | |
735 | fat_ok_for_reading: |
||
736 | ; call reserve_hd1 |
||
737 | |||
2434 | Serge | 738 | pushad |
1 | ha | 739 | |
2434 | Serge | 740 | mov ebx, edx |
741 | call get_cluster_of_a_path |
||
742 | jc file_to_read_not_found |
||
1 | ha | 743 | |
2434 | Serge | 744 | test edi, edi ; read rootdir |
745 | jne no_read_root |
||
1 | ha | 746 | |
2434 | Serge | 747 | xor eax, eax |
748 | call get_dir_size ; return rootdir size |
||
749 | cmp [hd_error], 0 |
||
750 | jne file_access_denied |
||
74 | mario79 | 751 | |
2434 | Serge | 752 | mov [file_size], eax |
753 | mov eax, [ROOT_CLUSTER] |
||
754 | jmp file_read_start |
||
1 | ha | 755 | |
756 | no_read_root: |
||
2434 | Serge | 757 | mov ebx, PUSHAD_EAX ; file name |
758 | call analyze_directory |
||
759 | jc file_to_read_not_found |
||
1 | ha | 760 | |
2434 | Serge | 761 | mov eax, [ebx+28] ; file size |
762 | test byte [ebx+11], 0x10; is it directory? |
||
763 | jz read_set_size ; no |
||
1 | ha | 764 | |
2434 | Serge | 765 | mov eax, [ebx+20-2] ; FAT entry |
766 | mov ax, [ebx+26] |
||
767 | and eax, [fatMASK] |
||
768 | call get_dir_size |
||
769 | cmp [hd_error], 0 |
||
770 | jne file_access_denied |
||
1 | ha | 771 | |
772 | read_set_size: |
||
2434 | Serge | 773 | mov [file_size], eax |
1 | ha | 774 | |
2434 | Serge | 775 | mov eax, [ebx+20-2] ; FAT entry |
776 | mov ax, [ebx+26] |
||
777 | and eax, [fatMASK] |
||
1 | ha | 778 | |
779 | file_read_start: |
||
2434 | Serge | 780 | mov ebx, PUSHAD_ECX ; pointer to buffer |
781 | mov edx, PUSHAD_EBX ; file blocks to read |
||
782 | mov esi, PUSHAD_ESI ; first 512 block to read |
||
1 | ha | 783 | |
784 | file_read_new_cluster: |
||
2434 | Serge | 785 | call get_data_cluster |
786 | jc file_read_eof ; end of file or cluster out of range |
||
1 | ha | 787 | |
2434 | Serge | 788 | test edx, edx ; is all read? |
789 | je file_read_OK ; yes |
||
1 | ha | 790 | |
2434 | Serge | 791 | call get_FAT ; get next cluster |
792 | cmp [hd_error], 0 |
||
793 | jne file_access_denied |
||
74 | mario79 | 794 | |
2434 | Serge | 795 | cmp eax, [fatRESERVED]; end of file |
796 | jnb file_read_eof |
||
797 | cmp eax, 2 ; incorrect fat chain |
||
798 | jnb file_read_new_cluster |
||
1 | ha | 799 | |
2434 | Serge | 800 | popad |
801 | mov [hd1_status], 0 |
||
802 | mov ebx, [file_size] |
||
803 | mov eax, ERROR_FAT_TABLE |
||
804 | ret |
||
1 | ha | 805 | |
806 | file_read_eof: |
||
2434 | Serge | 807 | cmp [hd_error], 0 |
808 | jne file_access_denied |
||
809 | popad |
||
810 | mov [hd1_status], 0 |
||
811 | mov ebx, [file_size] |
||
812 | mov eax, ERROR_END_OF_FILE |
||
813 | ret |
||
1 | ha | 814 | |
815 | file_read_OK: |
||
2434 | Serge | 816 | popad |
817 | mov [hd1_status], 0 |
||
818 | mov ebx, [file_size] |
||
819 | xor eax, eax |
||
820 | ret |
||
1 | ha | 821 | |
822 | file_to_read_not_found: |
||
2434 | Serge | 823 | cmp [hd_error], 0 |
824 | jne file_access_denied |
||
825 | popad |
||
826 | mov [hd1_status], 0 |
||
827 | xor ebx, ebx |
||
828 | mov eax, ERROR_FILE_NOT_FOUND |
||
829 | ret |
||
1 | ha | 830 | |
74 | mario79 | 831 | file_access_denied: |
2434 | Serge | 832 | popad |
833 | mov [hd1_status], 0 |
||
834 | xor ebx, ebx |
||
835 | mov eax, ERROR_ACCESS_DENIED |
||
836 | ret |
||
1 | ha | 837 | |
838 | get_dir_size: |
||
839 | ;----------------------------------------------------- |
||
840 | ; input : eax = first cluster (0=rootdir) |
||
841 | ; output : eax = directory size in bytes |
||
842 | ;----------------------------------------------------- |
||
2434 | Serge | 843 | push edx |
844 | xor edx, edx ; count of directory clusters |
||
845 | test eax, eax |
||
846 | jnz dir_size_next |
||
1 | ha | 847 | |
2434 | Serge | 848 | mov eax, [ROOT_SECTORS] |
849 | shl eax, 9 ; fat16 rootdir size in bytes |
||
850 | cmp [fs_type], 16 |
||
851 | je dir_size_ret |
||
852 | mov eax, [ROOT_CLUSTER] |
||
1 | ha | 853 | |
854 | dir_size_next: |
||
2434 | Serge | 855 | cmp eax, 2 ; incorrect fat chain |
856 | jb dir_size_end |
||
857 | cmp eax, [fatRESERVED]; end of directory |
||
858 | ja dir_size_end |
||
859 | call get_FAT ; get next cluster |
||
860 | cmp [hd_error], 0 |
||
861 | jne dir_size_ret |
||
74 | mario79 | 862 | |
2434 | Serge | 863 | inc edx |
864 | jmp dir_size_next |
||
1 | ha | 865 | |
866 | dir_size_end: |
||
2434 | Serge | 867 | imul eax, [SECTORS_PER_CLUSTER], 512; cluster size in bytes |
868 | imul eax, edx |
||
1 | ha | 869 | |
870 | dir_size_ret: |
||
2434 | Serge | 871 | pop edx |
872 | ret |
||
1 | ha | 873 | |
874 | |||
875 | clear_cluster_chain: |
||
876 | ;----------------------------------------------------- |
||
877 | ; input : eax = first cluster |
||
878 | ;----------------------------------------------------- |
||
2434 | Serge | 879 | push eax ecx edx |
880 | xor ecx, ecx ; cluster count |
||
1 | ha | 881 | |
882 | clean_new_chain: |
||
2434 | Serge | 883 | cmp eax, [LAST_CLUSTER]; end of file |
884 | ja delete_OK |
||
885 | cmp eax, 2 ; unfinished fat chain or zero length file |
||
886 | jb delete_OK |
||
887 | cmp eax, [ROOT_CLUSTER]; don't remove root cluster |
||
888 | jz delete_OK |
||
1 | ha | 889 | |
2434 | Serge | 890 | xor edx, edx |
891 | call set_FAT ; clear fat entry |
||
892 | cmp [hd_error], 0 |
||
893 | jne access_denied_01 |
||
74 | mario79 | 894 | |
2434 | Serge | 895 | inc ecx ; update cluster count |
896 | mov eax, edx ; old cluster |
||
897 | jmp clean_new_chain |
||
1 | ha | 898 | |
899 | delete_OK: |
||
2434 | Serge | 900 | call add_disk_free_space; add clusters to free disk space |
74 | mario79 | 901 | access_denied_01: |
2434 | Serge | 902 | pop edx ecx eax |
903 | ret |
||
1 | ha | 904 | |
905 | |||
906 | get_hd_info: |
||
907 | ;----------------------------------------------------------- |
||
908 | ; output : eax = 0 - ok |
||
909 | ; 3 - unknown FS |
||
74 | mario79 | 910 | ; 10 - access denied |
1 | ha | 911 | ; edx = cluster size in bytes |
912 | ; ebx = total clusters on disk |
||
913 | ; ecx = free clusters on disk |
||
914 | ;----------------------------------------------------------- |
||
256 | diamond | 915 | cmp [fs_type], 16 |
916 | jz info_fat_ok |
||
917 | cmp [fs_type], 32 |
||
918 | jz info_fat_ok |
||
2434 | Serge | 919 | xor edx, edx |
920 | xor ebx, ebx |
||
921 | xor ecx, ecx |
||
922 | mov eax, ERROR_UNKNOWN_FS |
||
923 | ret |
||
1 | ha | 924 | |
925 | info_fat_ok: |
||
926 | ; call reserve_hd1 |
||
927 | |||
2434 | Serge | 928 | xor ecx, ecx ; count of free clusters |
929 | mov eax, 2 |
||
930 | mov ebx, [LAST_CLUSTER] |
||
1 | ha | 931 | |
932 | info_cluster: |
||
2434 | Serge | 933 | push eax |
934 | call get_FAT ; get cluster info |
||
935 | cmp [hd_error], 0 |
||
936 | jne info_access_denied |
||
74 | mario79 | 937 | |
2434 | Serge | 938 | test eax, eax ; is it free? |
939 | jnz info_used ; no |
||
940 | inc ecx |
||
1 | ha | 941 | |
942 | info_used: |
||
2434 | Serge | 943 | pop eax |
944 | inc eax |
||
945 | cmp eax, ebx ; is above last cluster? |
||
946 | jbe info_cluster ; no. test next cluster |
||
1 | ha | 947 | |
2434 | Serge | 948 | dec ebx ; cluster count |
949 | imul edx, [SECTORS_PER_CLUSTER], 512; cluster size in bytes |
||
950 | mov [hd1_status], 0 |
||
951 | xor eax, eax |
||
952 | ret |
||
1 | ha | 953 | |
74 | mario79 | 954 | info_access_denied: |
2434 | Serge | 955 | add esp, 4 |
956 | xor edx, edx |
||
957 | xor ebx, ebx |
||
958 | xor ecx, ecx |
||
959 | mov eax, ERROR_ACCESS_DENIED |
||
960 | ret |
||
1 | ha | 961 | |
962 | update_disk: |
||
963 | ;----------------------------------------------------------- |
||
964 | ; write changed fat and cache to disk |
||
965 | ;----------------------------------------------------------- |
||
2434 | Serge | 966 | cmp [fat_change], 0 ; is fat changed? |
967 | je upd_no_change |
||
1 | ha | 968 | |
2434 | Serge | 969 | call write_fat_sector |
970 | cmp [hd_error], 0 |
||
971 | jne update_disk_acces_denied |
||
1 | ha | 972 | |
973 | upd_no_change: |
||
974 | |||
2434 | Serge | 975 | call write_cache |
74 | mario79 | 976 | update_disk_acces_denied: |
2434 | Serge | 977 | ret |
1 | ha | 978 | |
979 | |||
71 | diamond | 980 | ; \begin{diamond} |
981 | hd_find_lfn: |
||
521 | diamond | 982 | ; in: esi+ebp -> name |
71 | diamond | 983 | ; out: CF=1 - file not found |
86 | diamond | 984 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 985 | ; destroys eax |
986 | push esi edi |
||
987 | push 0 |
||
988 | push 0 |
||
989 | push fat16_root_first |
||
990 | push fat16_root_next |
||
991 | mov eax, [ROOT_CLUSTER] |
||
256 | diamond | 992 | cmp [fs_type], 32 |
83 | diamond | 993 | jz .fat32 |
994 | .loop: |
||
995 | call fat_find_lfn |
||
996 | jc .notfound |
||
997 | cmp byte [esi], 0 |
||
998 | jz .found |
||
521 | diamond | 999 | .continue: |
83 | diamond | 1000 | test byte [edi+11], 10h |
1001 | jz .notfound |
||
1002 | and dword [esp+12], 0 |
||
88 | diamond | 1003 | mov eax, [edi+20-2] |
1004 | mov ax, [edi+26] ; cluster |
||
83 | diamond | 1005 | .fat32: |
1006 | mov [esp+8], eax |
||
1007 | mov dword [esp+4], fat_notroot_first |
||
1008 | mov dword [esp], fat_notroot_next |
||
1009 | jmp .loop |
||
71 | diamond | 1010 | .notfound: |
83 | diamond | 1011 | add esp, 16 |
1012 | pop edi esi |
||
1013 | stc |
||
1014 | ret |
||
71 | diamond | 1015 | .found: |
521 | diamond | 1016 | test ebp, ebp |
1017 | jz @f |
||
1018 | mov esi, ebp |
||
1019 | xor ebp, ebp |
||
1020 | jmp .continue |
||
1021 | @@: |
||
86 | diamond | 1022 | lea eax, [esp+8] |
1023 | cmp dword [eax], 0 |
||
1024 | jz .root |
||
1025 | call fat_get_sector |
||
1026 | jmp .cmn |
||
1027 | .root: |
||
1028 | mov eax, [eax+4] |
||
1029 | add eax, [ROOT_START] |
||
1030 | .cmn: |
||
83 | diamond | 1031 | add esp, 20 ; CF=0 |
1032 | pop esi |
||
1033 | ret |
||
74 | mario79 | 1034 | |
71 | diamond | 1035 | ;---------------------------------------------------------------- |
1036 | ; |
||
1037 | ; fs_HdRead - LFN variant for reading hard disk |
||
1038 | ; |
||
1039 | ; esi points to filename |
||
1040 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1041 | ; may be ebx=0 - start from first byte |
||
1042 | ; ecx number of bytes to read, 0+ |
||
1043 | ; edx mem location to return data |
||
1044 | ; |
||
77 | diamond | 1045 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 1046 | ; eax = 0 ok read or other = errormsg |
1047 | ; |
||
1048 | ;-------------------------------------------------------------- |
||
1049 | fs_HdRead: |
||
256 | diamond | 1050 | cmp [fs_type], 16 |
1051 | jz @f |
||
1052 | cmp [fs_type], 32 |
||
1053 | jz @f |
||
1054 | cmp [fs_type], 1 |
||
1055 | jz ntfs_HdRead |
||
1378 | turbanoff | 1056 | cmp [fs_type], 2 |
1057 | jz ext2_HdRead |
||
256 | diamond | 1058 | or ebx, -1 |
1059 | mov eax, ERROR_UNKNOWN_FS |
||
1060 | ret |
||
71 | diamond | 1061 | @@: |
2434 | Serge | 1062 | push edi |
1063 | cmp byte [esi], 0 |
||
1064 | jnz @f |
||
71 | diamond | 1065 | .noaccess: |
2434 | Serge | 1066 | pop edi |
74 | mario79 | 1067 | .noaccess_2: |
2434 | Serge | 1068 | or ebx, -1 |
1069 | mov eax, ERROR_ACCESS_DENIED |
||
1070 | ret |
||
379 | serge | 1071 | |
71 | diamond | 1072 | @@: |
2434 | Serge | 1073 | call hd_find_lfn |
1074 | jnc .found |
||
1075 | pop edi |
||
1076 | cmp [hd_error], 0 |
||
1077 | jne .noaccess_2 |
||
1078 | or ebx, -1 |
||
1079 | mov eax, ERROR_FILE_NOT_FOUND |
||
1080 | ret |
||
74 | mario79 | 1081 | |
71 | diamond | 1082 | .found: |
2434 | Serge | 1083 | test byte [edi+11], 0x10; do not allow read directories |
1084 | jnz .noaccess |
||
1085 | test ebx, ebx |
||
1086 | jz .l1 |
||
1087 | cmp dword [ebx+4], 0 |
||
1088 | jz @f |
||
77 | diamond | 1089 | xor ebx, ebx |
71 | diamond | 1090 | .reteof: |
2434 | Serge | 1091 | mov eax, 6 |
1092 | pop edi |
||
1093 | ret |
||
71 | diamond | 1094 | @@: |
2434 | Serge | 1095 | mov ebx, [ebx] |
71 | diamond | 1096 | .l1: |
77 | diamond | 1097 | push ecx edx |
1098 | push 0 |
||
1099 | mov eax, [edi+28] |
||
1100 | sub eax, ebx |
||
1101 | jb .eof |
||
1102 | cmp eax, ecx |
||
1103 | jae @f |
||
1104 | mov ecx, eax |
||
1105 | mov byte [esp], 6 |
||
1106 | @@: |
||
2434 | Serge | 1107 | mov eax, [edi+20-2] |
1108 | mov ax, [edi+26] |
||
71 | diamond | 1109 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1110 | .new_cluster: |
||
2434 | Serge | 1111 | jecxz .new_sector |
1112 | test eax, eax |
||
1113 | jz .eof |
||
1114 | cmp eax, [fatRESERVED] |
||
1115 | jae .eof |
||
1116 | mov [cluster_tmp], eax |
||
1117 | dec eax |
||
1118 | dec eax |
||
1119 | mov edi, [SECTORS_PER_CLUSTER] |
||
1120 | imul eax, edi |
||
1121 | add eax, [DATA_START] |
||
71 | diamond | 1122 | .new_sector: |
2434 | Serge | 1123 | test ecx, ecx |
1124 | jz .done |
||
1125 | sub ebx, 512 |
||
1126 | jae .skip |
||
1127 | add ebx, 512 |
||
1128 | jnz .force_buf |
||
1129 | cmp ecx, 512 |
||
1130 | jb .force_buf |
||
71 | diamond | 1131 | ; we may read directly to given buffer |
2434 | Serge | 1132 | push ebx |
1133 | mov ebx, edx |
||
1134 | call hd_read |
||
1135 | pop ebx |
||
1136 | cmp [hd_error], 0 |
||
1137 | jne .noaccess_1 |
||
1138 | add edx, 512 |
||
1139 | sub ecx, 512 |
||
1140 | jmp .skip |
||
71 | diamond | 1141 | .force_buf: |
1142 | ; we must read sector to temporary buffer and then copy it to destination |
||
2434 | Serge | 1143 | push eax ebx |
1144 | mov ebx, buffer |
||
1145 | call hd_read |
||
1146 | mov eax, ebx |
||
1147 | pop ebx |
||
1148 | cmp [hd_error], 0 |
||
1149 | jne .noaccess_3 |
||
1150 | add eax, ebx |
||
1151 | push ecx |
||
1152 | add ecx, ebx |
||
1153 | cmp ecx, 512 |
||
1154 | jbe @f |
||
1155 | mov ecx, 512 |
||
71 | diamond | 1156 | @@: |
2434 | Serge | 1157 | sub ecx, ebx |
1158 | mov ebx, edx |
||
1159 | call memmove |
||
1160 | add edx, ecx |
||
1161 | sub [esp], ecx |
||
1162 | pop ecx |
||
1163 | pop eax |
||
1164 | xor ebx, ebx |
||
71 | diamond | 1165 | .skip: |
2434 | Serge | 1166 | inc eax |
1167 | dec edi |
||
1168 | jnz .new_sector |
||
1169 | mov eax, [cluster_tmp] |
||
1170 | call get_FAT |
||
1171 | cmp [hd_error], 0 |
||
1172 | jne .noaccess_1 |
||
74 | mario79 | 1173 | |
2434 | Serge | 1174 | jmp .new_cluster |
1124 | diamond | 1175 | .noaccess_3: |
1176 | pop eax |
||
1177 | .noaccess_1: |
||
1178 | pop eax |
||
1179 | push 11 |
||
71 | diamond | 1180 | .done: |
77 | diamond | 1181 | mov ebx, edx |
1182 | pop eax edx ecx edi |
||
1183 | sub ebx, edx |
||
1184 | ret |
||
71 | diamond | 1185 | .eof: |
77 | diamond | 1186 | mov ebx, edx |
1187 | pop eax edx ecx |
||
1188 | sub ebx, edx |
||
1189 | jmp .reteof |
||
75 | diamond | 1190 | |
1191 | ;---------------------------------------------------------------- |
||
1192 | ; |
||
1193 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
1194 | ; |
||
1195 | ; esi points to filename |
||
78 | diamond | 1196 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
1197 | ; & flags (bitfields) |
||
1198 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 1199 | ; ecx number of blocks to read, 0+ |
1200 | ; edx mem location to return data |
||
1201 | ; |
||
77 | diamond | 1202 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 1203 | ; eax = 0 ok read or other = errormsg |
1204 | ; |
||
1205 | ;-------------------------------------------------------------- |
||
1206 | fs_HdReadFolder: |
||
256 | diamond | 1207 | cmp [fs_type], 1 |
1208 | jz ntfs_HdReadFolder |
||
1378 | turbanoff | 1209 | cmp [fs_type], 2 |
1210 | jz ext2_HdReadFolder |
||
256 | diamond | 1211 | cmp [fs_type], 16 |
1212 | jz @f |
||
1213 | cmp [fs_type], 32 |
||
1214 | jz @f |
||
1215 | push ERROR_UNSUPPORTED_FS |
||
1216 | pop eax |
||
1217 | or ebx, -1 |
||
1218 | ret |
||
1219 | @@: |
||
75 | diamond | 1220 | mov eax, [ROOT_CLUSTER] |
1221 | push edi |
||
1222 | cmp byte [esi], 0 |
||
1223 | jz .doit |
||
1224 | call hd_find_lfn |
||
1225 | jnc .found |
||
1226 | pop edi |
||
1227 | or ebx, -1 |
||
1228 | mov eax, ERROR_FILE_NOT_FOUND |
||
1229 | ret |
||
1230 | .found: |
||
1231 | test byte [edi+11], 0x10 ; do not allow read files |
||
1232 | jnz .found_dir |
||
1233 | pop edi |
||
1234 | or ebx, -1 |
||
1235 | mov eax, ERROR_ACCESS_DENIED |
||
1236 | ret |
||
1237 | .found_dir: |
||
1238 | mov eax, [edi+20-2] |
||
1239 | mov ax, [edi+26] ; eax=cluster |
||
1240 | .doit: |
||
1241 | push esi ecx |
||
1242 | push ebp |
||
1243 | sub esp, 262*2 ; reserve space for LFN |
||
1244 | mov ebp, esp |
||
78 | diamond | 1245 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1246 | mov ebx, [ebx] |
||
75 | diamond | 1247 | ; init header |
1248 | push eax ecx |
||
1249 | mov edi, edx |
||
1250 | mov ecx, 32/4 |
||
1251 | xor eax, eax |
||
2434 | Serge | 1252 | rep stosd |
75 | diamond | 1253 | pop ecx eax |
1254 | mov byte [edx], 1 ; version |
||
1255 | mov esi, edi ; esi points to BDFE |
||
1256 | .new_cluster: |
||
1257 | mov [cluster_tmp], eax |
||
1258 | test eax, eax |
||
1259 | jnz @f |
||
256 | diamond | 1260 | cmp [fs_type], 32 |
75 | diamond | 1261 | jz .notfound |
1262 | mov eax, [ROOT_START] |
||
1263 | push [ROOT_SECTORS] |
||
1264 | push ebx |
||
1265 | jmp .new_sector |
||
1266 | @@: |
||
1267 | dec eax |
||
1268 | dec eax |
||
1269 | imul eax, [SECTORS_PER_CLUSTER] |
||
1270 | push [SECTORS_PER_CLUSTER] |
||
1271 | add eax, [DATA_START] |
||
1272 | push ebx |
||
1273 | .new_sector: |
||
1274 | mov ebx, buffer |
||
1275 | mov edi, ebx |
||
1276 | call hd_read |
||
1277 | cmp [hd_error], 0 |
||
1278 | jnz .notfound2 |
||
1279 | add ebx, 512 |
||
1280 | push eax |
||
1281 | .l1: |
||
1282 | call fat_get_name |
||
1283 | jc .l2 |
||
1284 | cmp byte [edi+11], 0xF |
||
1285 | jnz .do_bdfe |
||
1286 | add edi, 0x20 |
||
1287 | cmp edi, ebx |
||
1288 | jb .do_bdfe |
||
1289 | pop eax |
||
1290 | inc eax |
||
1291 | dec dword [esp+4] |
||
1292 | jnz @f |
||
1293 | mov eax, [cluster_tmp] |
||
1294 | test eax, eax |
||
1295 | jz .done |
||
1296 | call get_FAT |
||
1297 | cmp [hd_error], 0 |
||
1298 | jnz .notfound2 |
||
1299 | cmp eax, 2 |
||
1300 | jb .done |
||
1301 | cmp eax, [fatRESERVED] |
||
1302 | jae .done |
||
1303 | push eax |
||
1304 | mov eax, [SECTORS_PER_CLUSTER] |
||
1305 | mov [esp+8], eax |
||
1306 | pop eax |
||
1307 | mov [cluster_tmp], eax |
||
1308 | dec eax |
||
1309 | dec eax |
||
1310 | imul eax, [SECTORS_PER_CLUSTER] |
||
1311 | add eax, [DATA_START] |
||
1312 | @@: |
||
1313 | mov ebx, buffer |
||
1314 | mov edi, ebx |
||
1315 | call hd_read |
||
1316 | cmp [hd_error], 0 |
||
1317 | jnz .notfound2 |
||
1318 | add ebx, 512 |
||
1319 | push eax |
||
1320 | .do_bdfe: |
||
1321 | inc dword [edx+8] ; new file found |
||
1322 | dec dword [esp+4] |
||
1323 | jns .l2 |
||
1324 | dec ecx |
||
1325 | js .l2 |
||
1326 | inc dword [edx+4] ; new file block copied |
||
1327 | call fat_entry_to_bdfe |
||
1328 | .l2: |
||
1329 | add edi, 0x20 |
||
1330 | cmp edi, ebx |
||
1331 | jb .l1 |
||
1332 | pop eax |
||
1333 | inc eax |
||
1334 | dec dword [esp+4] |
||
1335 | jnz .new_sector |
||
1336 | mov eax, [cluster_tmp] |
||
1337 | test eax, eax |
||
1338 | jz .done |
||
1339 | call get_FAT |
||
1340 | cmp [hd_error], 0 |
||
1341 | jnz .notfound2 |
||
1342 | cmp eax, 2 |
||
1343 | jb .done |
||
1344 | cmp eax, [fatRESERVED] |
||
1345 | jae .done |
||
1346 | push eax |
||
1347 | mov eax, [SECTORS_PER_CLUSTER] |
||
1348 | mov [esp+8], eax |
||
1349 | pop eax |
||
1350 | pop ebx |
||
1351 | add esp, 4 |
||
1352 | jmp .new_cluster |
||
1353 | .notfound2: |
||
1354 | add esp, 8 |
||
1355 | .notfound: |
||
1356 | add esp, 262*2+4 |
||
1357 | pop ebp ecx esi edi |
||
1358 | mov eax, ERROR_FILE_NOT_FOUND |
||
1359 | or ebx, -1 |
||
1360 | ret |
||
1361 | .done: |
||
1362 | add esp, 262*2+4+8 |
||
1363 | pop ebp |
||
77 | diamond | 1364 | mov ebx, [edx+4] |
75 | diamond | 1365 | xor eax, eax |
1366 | dec ecx |
||
1367 | js @f |
||
1368 | mov al, ERROR_END_OF_FILE |
||
1369 | @@: |
||
1370 | pop ecx esi edi |
||
1371 | ret |
||
1372 | |||
83 | diamond | 1373 | fat16_root_next: |
1374 | cmp edi, buffer+0x200-0x20 |
||
1375 | jae fat16_root_next_sector |
||
1376 | add edi, 0x20 |
||
1377 | ret ; CF=0 |
||
1378 | fat16_root_next_sector: |
||
1379 | ; read next sector |
||
171 | diamond | 1380 | push [longname_sec2] |
1381 | pop [longname_sec1] |
||
83 | diamond | 1382 | push ecx |
1383 | mov ecx, [eax+4] |
||
171 | diamond | 1384 | push ecx |
1385 | add ecx, [ROOT_START] |
||
1386 | mov [longname_sec2], ecx |
||
1387 | pop ecx |
||
83 | diamond | 1388 | inc ecx |
1389 | mov [eax+4], ecx |
||
1390 | cmp ecx, [ROOT_SECTORS] |
||
1391 | pop ecx |
||
1392 | jae fat16_root_first.readerr |
||
1393 | fat16_root_first: |
||
1394 | mov eax, [eax+4] |
||
1395 | add eax, [ROOT_START] |
||
1396 | push ebx |
||
1397 | mov edi, buffer |
||
1398 | mov ebx, edi |
||
1399 | call hd_read |
||
1400 | pop ebx |
||
1401 | cmp [hd_error], 0 |
||
1402 | jnz .readerr |
||
1403 | ret ; CF=0 |
||
1404 | .readerr: |
||
1405 | stc |
||
1406 | ret |
||
1407 | fat16_root_begin_write: |
||
1408 | push edi eax |
||
1409 | call fat16_root_first |
||
1410 | pop eax edi |
||
1411 | ret |
||
1412 | fat16_root_end_write: |
||
1413 | pusha |
||
1414 | mov eax, [eax+4] |
||
1415 | add eax, [ROOT_START] |
||
1416 | mov ebx, buffer |
||
1417 | call hd_write |
||
1418 | popa |
||
1419 | ret |
||
1420 | fat16_root_next_write: |
||
1421 | cmp edi, buffer+0x200 |
||
1422 | jae @f |
||
1423 | ret |
||
1424 | @@: |
||
1425 | call fat16_root_end_write |
||
1426 | jmp fat16_root_next_sector |
||
1427 | fat16_root_extend_dir: |
||
1428 | stc |
||
1429 | ret |
||
1430 | |||
1431 | fat_notroot_next: |
||
1432 | cmp edi, buffer+0x200-0x20 |
||
1433 | jae fat_notroot_next_sector |
||
1434 | add edi, 0x20 |
||
1435 | ret ; CF=0 |
||
1436 | fat_notroot_next_sector: |
||
171 | diamond | 1437 | push [longname_sec2] |
1438 | pop [longname_sec1] |
||
1439 | push eax |
||
1440 | call fat_get_sector |
||
1441 | mov [longname_sec2], eax |
||
1442 | pop eax |
||
83 | diamond | 1443 | push ecx |
1444 | mov ecx, [eax+4] |
||
1445 | inc ecx |
||
1446 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
1447 | jae fat_notroot_next_cluster |
||
1448 | mov [eax+4], ecx |
||
1449 | jmp @f |
||
1450 | fat_notroot_next_cluster: |
||
1451 | push eax |
||
1452 | mov eax, [eax] |
||
1453 | call get_FAT |
||
1454 | mov ecx, eax |
||
1455 | pop eax |
||
1456 | cmp [hd_error], 0 |
||
1457 | jnz fat_notroot_next_err |
||
1458 | cmp ecx, [fatRESERVED] |
||
1459 | jae fat_notroot_next_err |
||
1460 | mov [eax], ecx |
||
1461 | and dword [eax+4], 0 |
||
1462 | @@: |
||
1463 | pop ecx |
||
1464 | fat_notroot_first: |
||
1465 | call fat_get_sector |
||
1466 | push ebx |
||
1467 | mov edi, buffer |
||
1468 | mov ebx, edi |
||
1469 | call hd_read |
||
1470 | pop ebx |
||
1471 | cmp [hd_error], 0 |
||
1472 | jnz @f |
||
1473 | ret ; CF=0 |
||
1474 | fat_notroot_next_err: |
||
1475 | pop ecx |
||
1476 | @@: |
||
1477 | stc |
||
1478 | ret |
||
1479 | fat_notroot_begin_write: |
||
1480 | push eax edi |
||
1481 | call fat_notroot_first |
||
1482 | pop edi eax |
||
1483 | ret |
||
1484 | fat_notroot_end_write: |
||
1485 | call fat_get_sector |
||
1486 | push ebx |
||
1487 | mov ebx, buffer |
||
1488 | call hd_write |
||
1489 | pop ebx |
||
1490 | ret |
||
1491 | fat_notroot_next_write: |
||
1492 | cmp edi, buffer+0x200 |
||
1493 | jae @f |
||
1494 | ret |
||
1495 | @@: |
||
1496 | push eax |
||
1497 | call fat_notroot_end_write |
||
1498 | pop eax |
||
1499 | jmp fat_notroot_next_sector |
||
1500 | fat_notroot_extend_dir: |
||
1501 | push eax |
||
1502 | call get_free_FAT |
||
1503 | jnc .found |
||
1504 | pop eax |
||
1505 | ret ; CF=1 |
||
1506 | .found: |
||
1507 | push edx |
||
1508 | mov edx, [fatEND] |
||
1509 | call set_FAT |
||
1510 | mov edx, eax |
||
1511 | mov eax, [esp+4] |
||
1512 | mov eax, [eax] |
||
1513 | push edx |
||
1514 | call set_FAT |
||
1515 | pop edx |
||
1516 | cmp [hd_error], 0 |
||
1517 | jz @f |
||
1518 | pop edx |
||
1519 | pop eax |
||
1520 | stc |
||
1521 | ret |
||
1522 | @@: |
||
1523 | push ecx |
||
1524 | or ecx, -1 |
||
1525 | call add_disk_free_space |
||
1526 | ; zero new cluster |
||
1527 | mov ecx, 512/4 |
||
1528 | mov edi, buffer |
||
1529 | push edi |
||
1530 | xor eax, eax |
||
2434 | Serge | 1531 | rep stosd |
83 | diamond | 1532 | pop edi |
1533 | pop ecx |
||
1534 | mov eax, [esp+4] |
||
1535 | mov [eax], edx |
||
1536 | and dword [eax+4], 0 |
||
1537 | pop edx |
||
1538 | mov eax, [eax] |
||
1539 | dec eax |
||
1540 | dec eax |
||
1541 | push ebx ecx |
||
1542 | mov ecx, [SECTORS_PER_CLUSTER] |
||
1543 | imul eax, ecx |
||
1544 | add eax, [DATA_START] |
||
1545 | mov ebx, edi |
||
1546 | @@: |
||
1547 | call hd_write |
||
1548 | inc eax |
||
1549 | loop @b |
||
1550 | pop ecx ebx eax |
||
1551 | clc |
||
1552 | ret |
||
1553 | |||
1554 | fat_get_sector: |
||
1555 | push ecx |
||
1556 | mov ecx, [eax] |
||
1557 | dec ecx |
||
1558 | dec ecx |
||
1559 | imul ecx, [SECTORS_PER_CLUSTER] |
||
1560 | add ecx, [DATA_START] |
||
1561 | add ecx, [eax+4] |
||
1562 | mov eax, ecx |
||
1563 | pop ecx |
||
1564 | ret |
||
1565 | |||
1566 | ;---------------------------------------------------------------- |
||
1567 | ; |
||
1568 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
1569 | ; |
||
1570 | ; esi points to filename |
||
1571 | ; ebx ignored (reserved) |
||
1572 | ; ecx number of bytes to write, 0+ |
||
1573 | ; edx mem location to data |
||
1574 | ; |
||
1575 | ; ret ebx = number of written bytes |
||
1576 | ; eax = 0 ok read or other = errormsg |
||
1577 | ; |
||
1578 | ;-------------------------------------------------------------- |
||
1579 | fshrad: |
||
1580 | mov eax, ERROR_ACCESS_DENIED |
||
1581 | xor ebx, ebx |
||
1582 | ret |
||
1583 | fshrfs: |
||
1584 | mov eax, ERROR_UNKNOWN_FS |
||
1585 | xor ebx, ebx |
||
1586 | ret |
||
1587 | |||
321 | diamond | 1588 | fs_HdCreateFolder: |
1589 | mov al, 1 |
||
1590 | jmp fs_HdRewrite.common |
||
1591 | |||
83 | diamond | 1592 | fs_HdRewrite: |
321 | diamond | 1593 | xor eax, eax |
1594 | .common: |
||
256 | diamond | 1595 | cmp [fs_type], 1 |
1596 | jz ntfs_HdRewrite |
||
2434 | Serge | 1597 | cmp [fs_type], 2 |
1598 | jz ext2_HdRewrite |
||
256 | diamond | 1599 | cmp [fs_type], 16 |
1600 | jz @f |
||
1601 | cmp [fs_type], 32 |
||
1602 | jnz fshrfs |
||
1603 | @@: |
||
83 | diamond | 1604 | cmp byte [esi], 0 |
1605 | jz fshrad |
||
1606 | pushad |
||
521 | diamond | 1607 | xor edi, edi |
83 | diamond | 1608 | push esi |
521 | diamond | 1609 | test ebp, ebp |
1610 | jz @f |
||
1611 | mov esi, ebp |
||
83 | diamond | 1612 | @@: |
1613 | lodsb |
||
1614 | test al, al |
||
1615 | jz @f |
||
1616 | cmp al, '/' |
||
1617 | jnz @b |
||
521 | diamond | 1618 | lea edi, [esi-1] |
83 | diamond | 1619 | jmp @b |
1620 | @@: |
||
1621 | pop esi |
||
521 | diamond | 1622 | test edi, edi |
1623 | jnz .noroot |
||
83 | diamond | 1624 | test ebp, ebp |
521 | diamond | 1625 | jnz .hasebp |
83 | diamond | 1626 | mov ebp, [ROOT_CLUSTER] |
256 | diamond | 1627 | cmp [fs_type], 32 |
83 | diamond | 1628 | jz .pushnotroot |
1629 | push fat16_root_extend_dir |
||
1630 | push fat16_root_end_write |
||
1631 | push fat16_root_next_write |
||
1632 | push fat16_root_begin_write |
||
1633 | xor ebp, ebp |
||
1634 | push ebp |
||
1635 | push ebp |
||
1636 | push fat16_root_first |
||
1637 | push fat16_root_next |
||
1638 | jmp .common1 |
||
521 | diamond | 1639 | .hasebp: |
1640 | mov eax, ERROR_ACCESS_DENIED |
||
1641 | cmp byte [ebp], 0 |
||
1642 | jz .ret1 |
||
1643 | push ebp |
||
1644 | xor ebp, ebp |
||
1645 | call hd_find_lfn |
||
1646 | pop esi |
||
1647 | jc .notfound0 |
||
1648 | jmp .common0 |
||
83 | diamond | 1649 | .noroot: |
335 | diamond | 1650 | mov eax, ERROR_ACCESS_DENIED |
521 | diamond | 1651 | cmp byte [edi+1], 0 |
335 | diamond | 1652 | jz .ret1 |
83 | diamond | 1653 | ; check existence |
521 | diamond | 1654 | mov byte [edi], 0 |
1655 | push edi |
||
83 | diamond | 1656 | call hd_find_lfn |
521 | diamond | 1657 | pop esi |
1658 | mov byte [esi], '/' |
||
83 | diamond | 1659 | jnc @f |
521 | diamond | 1660 | .notfound0: |
83 | diamond | 1661 | mov eax, ERROR_FILE_NOT_FOUND |
1662 | .ret1: |
||
1663 | mov [esp+28], eax |
||
1664 | popad |
||
1665 | xor ebx, ebx |
||
1666 | ret |
||
1667 | @@: |
||
521 | diamond | 1668 | inc esi |
1669 | .common0: |
||
83 | diamond | 1670 | test byte [edi+11], 0x10 ; must be directory |
1671 | mov eax, ERROR_ACCESS_DENIED |
||
1672 | jz .ret1 |
||
1673 | mov ebp, [edi+20-2] |
||
1674 | mov bp, [edi+26] ; ebp=cluster |
||
1675 | mov eax, ERROR_FAT_TABLE |
||
1676 | cmp ebp, 2 |
||
1677 | jb .ret1 |
||
1678 | .pushnotroot: |
||
1679 | push fat_notroot_extend_dir |
||
1680 | push fat_notroot_end_write |
||
1681 | push fat_notroot_next_write |
||
1682 | push fat_notroot_begin_write |
||
1683 | push 0 |
||
1684 | push ebp |
||
1685 | push fat_notroot_first |
||
1686 | push fat_notroot_next |
||
1687 | .common1: |
||
1688 | call fat_find_lfn |
||
1689 | jc .notfound |
||
321 | diamond | 1690 | ; found |
91 | diamond | 1691 | test byte [edi+11], 10h |
321 | diamond | 1692 | jz .exists_file |
1693 | ; found directory; if we are creating directory, return OK, |
||
1694 | ; if we are creating file, say "access denied" |
||
1695 | add esp, 32 |
||
1696 | popad |
||
1697 | test al, al |
||
1698 | mov eax, ERROR_ACCESS_DENIED |
||
91 | diamond | 1699 | jz @f |
321 | diamond | 1700 | mov al, 0 |
1701 | @@: |
||
1702 | xor ebx, ebx |
||
1703 | ret |
||
1704 | .exists_file: |
||
1705 | ; found file; if we are creating directory, return "access denied", |
||
1706 | ; if we are creating file, delete existing file and continue |
||
1707 | cmp byte [esp+32+28], 0 |
||
1708 | jz @f |
||
91 | diamond | 1709 | add esp, 32 |
1710 | popad |
||
1711 | mov eax, ERROR_ACCESS_DENIED |
||
1712 | xor ebx, ebx |
||
1713 | ret |
||
1714 | @@: |
||
1715 | ; delete FAT chain |
||
83 | diamond | 1716 | push edi |
1717 | xor eax, eax |
||
1718 | mov dword [edi+28], eax ; zero size |
||
1719 | xor ecx, ecx |
||
1720 | mov eax, [edi+20-2] |
||
1721 | mov ax, [edi+26] |
||
1722 | mov word [edi+20], cx |
||
1723 | mov word [edi+26], cx |
||
1724 | test eax, eax |
||
1725 | jz .done1 |
||
1726 | @@: |
||
1727 | cmp eax, [fatRESERVED] |
||
1728 | jae .done1 |
||
1729 | push edx |
||
1730 | xor edx, edx |
||
1731 | call set_FAT |
||
1732 | mov eax, edx |
||
1733 | pop edx |
||
1734 | inc ecx |
||
1735 | jmp @b |
||
1736 | .done1: |
||
1737 | pop edi |
||
1738 | call get_time_for_file |
||
1739 | mov [edi+22], ax |
||
1740 | call get_date_for_file |
||
1741 | mov [edi+24], ax |
||
1742 | mov [edi+18], ax |
||
1743 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1744 | jmp .doit |
||
1745 | .notfound: |
||
1746 | ; file is not found; generate short name |
||
1747 | call fat_name_is_legal |
||
1748 | jc @f |
||
1749 | add esp, 32 |
||
1750 | popad |
||
1751 | mov eax, ERROR_FILE_NOT_FOUND |
||
1752 | xor ebx, ebx |
||
1753 | ret |
||
1754 | @@: |
||
1755 | sub esp, 12 |
||
1756 | mov edi, esp |
||
1757 | call fat_gen_short_name |
||
1758 | .test_short_name_loop: |
||
1759 | push esi edi ecx |
||
1760 | mov esi, edi |
||
1761 | lea eax, [esp+12+12+8] |
||
1762 | mov [eax], ebp |
||
1763 | and dword [eax+4], 0 |
||
1764 | call dword [eax-4] |
||
1765 | jc .found |
||
1766 | .test_short_name_entry: |
||
1767 | cmp byte [edi+11], 0xF |
||
1768 | jz .test_short_name_cont |
||
1769 | mov ecx, 11 |
||
1770 | push esi edi |
||
2434 | Serge | 1771 | repz cmpsb |
83 | diamond | 1772 | pop edi esi |
1773 | jz .short_name_found |
||
1774 | .test_short_name_cont: |
||
1775 | lea eax, [esp+12+12+8] |
||
1776 | call dword [eax-8] |
||
1777 | jnc .test_short_name_entry |
||
1778 | jmp .found |
||
1779 | .short_name_found: |
||
1780 | pop ecx edi esi |
||
1781 | call fat_next_short_name |
||
1782 | jnc .test_short_name_loop |
||
1783 | .disk_full: |
||
1784 | add esp, 12+32 |
||
1785 | popa |
||
1786 | mov eax, ERROR_DISK_FULL |
||
1787 | xor ebx, ebx |
||
1788 | ret |
||
1789 | .found: |
||
1790 | pop ecx edi esi |
||
1791 | ; now find space in directory |
||
1792 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1793 | mov al, '~' |
||
1794 | push ecx edi |
||
1795 | mov ecx, 8 |
||
2434 | Serge | 1796 | repnz scasb |
83 | diamond | 1797 | push 1 |
1798 | pop eax ; 1 entry |
||
1799 | jnz .notilde |
||
1800 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1801 | xor eax, eax |
||
1802 | @@: |
||
1803 | cmp byte [esi], 0 |
||
1804 | jz @f |
||
1805 | inc esi |
||
1806 | inc eax |
||
1807 | jmp @b |
||
1808 | @@: |
||
1809 | sub esi, eax |
||
1810 | add eax, 12+13 |
||
1811 | mov ecx, 13 |
||
1812 | push edx |
||
1813 | cdq |
||
1814 | div ecx |
||
1815 | pop edx |
||
1816 | .notilde: |
||
1817 | push -1 |
||
1818 | push -1 |
||
1819 | push -1 |
||
1820 | ; find |
||
1821 | xor ecx, ecx |
||
1822 | push eax |
||
1823 | lea eax, [esp+16+8+12+8] |
||
1824 | mov [eax], ebp |
||
1825 | and dword [eax+4], 0 |
||
1826 | call dword [eax-4] |
||
1827 | pop eax |
||
1828 | jnc .scan_dir |
||
1829 | .fsfrfe3: |
||
1830 | add esp, 12+8+12+32 |
||
1831 | popad |
||
1832 | mov eax, 11 |
||
1833 | xor ebx, ebx |
||
1834 | ret |
||
1835 | .scan_dir: |
||
1836 | cmp byte [edi], 0 |
||
1837 | jz .free |
||
1838 | cmp byte [edi], 0xE5 |
||
1839 | jz .free |
||
1840 | xor ecx, ecx |
||
1841 | .scan_cont: |
||
1842 | push eax |
||
1843 | lea eax, [esp+16+8+12+8] |
||
1844 | call dword [eax-8] |
||
1845 | pop eax |
||
1846 | jnc .scan_dir |
||
1847 | cmp [hd_error], 0 |
||
1848 | jnz .fsfrfe3 |
||
1849 | push eax |
||
1850 | lea eax, [esp+16+8+12+8] |
||
1851 | call dword [eax+20] ; extend directory |
||
1852 | pop eax |
||
1853 | jnc .scan_dir |
||
1854 | add esp, 12+8+12+32 |
||
1855 | popad |
||
1856 | mov eax, ERROR_DISK_FULL |
||
1857 | xor ebx, ebx |
||
1858 | ret |
||
1859 | .free: |
||
1860 | test ecx, ecx |
||
1861 | jnz @f |
||
1862 | mov [esp], edi |
||
1863 | mov ecx, [esp+12+8+12+8] |
||
1864 | mov [esp+4], ecx |
||
1865 | mov ecx, [esp+12+8+12+12] |
||
1866 | mov [esp+8], ecx |
||
1867 | xor ecx, ecx |
||
1868 | @@: |
||
1869 | inc ecx |
||
1870 | cmp ecx, eax |
||
1871 | jb .scan_cont |
||
1872 | ; found! |
||
1873 | ; calculate name checksum |
||
1874 | push esi ecx |
||
1875 | mov esi, [esp+8+12] |
||
1876 | mov ecx, 11 |
||
1877 | xor eax, eax |
||
1878 | @@: |
||
1879 | ror al, 1 |
||
1880 | add al, [esi] |
||
1881 | inc esi |
||
1882 | loop @b |
||
1883 | pop ecx esi |
||
1884 | pop edi |
||
1885 | pop dword [esp+8+12+12] |
||
1886 | pop dword [esp+8+12+12] |
||
1887 | ; edi points to first entry in free chunk |
||
1888 | dec ecx |
||
1889 | jz .nolfn |
||
1890 | push esi |
||
1891 | push eax |
||
1892 | lea eax, [esp+8+8+12+8] |
||
1893 | call dword [eax+8] ; begin write |
||
1894 | mov al, 40h |
||
1895 | .writelfn: |
||
1896 | or al, cl |
||
1897 | mov esi, [esp+4] |
||
1898 | push ecx |
||
1899 | dec ecx |
||
1900 | imul ecx, 13 |
||
1901 | add esi, ecx |
||
1902 | stosb |
||
1903 | mov cl, 5 |
||
1904 | call fs_RamdiskRewrite.read_symbols |
||
1905 | mov ax, 0xF |
||
1906 | stosw |
||
1907 | mov al, [esp+4] |
||
1908 | stosb |
||
1909 | mov cl, 6 |
||
1910 | call fs_RamdiskRewrite.read_symbols |
||
1911 | xor eax, eax |
||
1912 | stosw |
||
1913 | mov cl, 2 |
||
1914 | call fs_RamdiskRewrite.read_symbols |
||
1915 | pop ecx |
||
1916 | lea eax, [esp+8+8+12+8] |
||
1917 | call dword [eax+12] ; next write |
||
1918 | xor eax, eax |
||
1919 | loop .writelfn |
||
1920 | pop eax |
||
1921 | pop esi |
||
1922 | ; lea eax, [esp+8+12+8] |
||
1923 | ; call dword [eax+16] ; end write |
||
1924 | .nolfn: |
||
1925 | xchg esi, [esp] |
||
1926 | mov ecx, 11 |
||
2434 | Serge | 1927 | rep movsb |
83 | diamond | 1928 | mov word [edi], 20h ; attributes |
1929 | sub edi, 11 |
||
1930 | pop esi ecx |
||
1931 | add esp, 12 |
||
1932 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1933 | call get_time_for_file |
||
1934 | mov [edi+14], ax ; creation time |
||
1935 | mov [edi+22], ax ; last write time |
||
1936 | call get_date_for_file |
||
1937 | mov [edi+16], ax ; creation date |
||
1938 | mov [edi+24], ax ; last write date |
||
1939 | mov [edi+18], ax ; last access date |
||
1940 | xor ecx, ecx |
||
1941 | mov word [edi+20], cx ; high word of cluster |
||
1942 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
1943 | mov dword [edi+28], ecx ; file size - to be filled |
||
321 | diamond | 1944 | cmp byte [esp+32+28], cl |
1945 | jz .doit |
||
1946 | ; create directory |
||
1947 | mov byte [edi+11], 10h ; attributes: folder |
||
1948 | mov edx, edi |
||
1949 | lea eax, [esp+8] |
||
1950 | call dword [eax+16] ; flush directory |
||
1951 | push ecx |
||
1952 | mov ecx, [SECTORS_PER_CLUSTER] |
||
1953 | shl ecx, 9 |
||
1954 | jmp .doit2 |
||
83 | diamond | 1955 | .doit: |
1956 | lea eax, [esp+8] |
||
1957 | call dword [eax+16] ; flush directory |
||
1958 | push ecx |
||
1959 | mov ecx, [esp+4+32+24] |
||
321 | diamond | 1960 | .doit2: |
83 | diamond | 1961 | push ecx |
1962 | push edi |
||
1963 | mov esi, edx |
||
1964 | test ecx, ecx |
||
1965 | jz .done |
||
1966 | call get_free_FAT |
||
1967 | jc .diskfull |
||
1968 | push eax |
||
1969 | mov [edi+26], ax |
||
1970 | shr eax, 16 |
||
1971 | mov [edi+20], ax |
||
1972 | lea eax, [esp+16+8] |
||
1973 | call dword [eax+16] ; flush directory |
||
1974 | pop eax |
||
1975 | push edx |
||
1976 | mov edx, [fatEND] |
||
1977 | call set_FAT |
||
1978 | pop edx |
||
1979 | .write_cluster: |
||
1980 | push eax |
||
1981 | dec eax |
||
1982 | dec eax |
||
1983 | mov ebp, [SECTORS_PER_CLUSTER] |
||
1984 | imul eax, ebp |
||
1985 | add eax, [DATA_START] |
||
1986 | ; write data |
||
1987 | .write_sector: |
||
321 | diamond | 1988 | cmp byte [esp+16+32+28], 0 |
1989 | jnz .writedir |
||
83 | diamond | 1990 | mov ecx, 512 |
1991 | cmp dword [esp+8], ecx |
||
1992 | jb .writeshort |
||
1993 | ; we can write directly from given buffer |
||
1994 | mov ebx, esi |
||
1995 | add esi, ecx |
||
1996 | jmp .writecommon |
||
1997 | .writeshort: |
||
1998 | mov ecx, [esp+8] |
||
1999 | push ecx |
||
2000 | mov edi, buffer |
||
2001 | mov ebx, edi |
||
2434 | Serge | 2002 | rep movsb |
321 | diamond | 2003 | .writedircont: |
83 | diamond | 2004 | mov ecx, buffer+0x200 |
2005 | sub ecx, edi |
||
2006 | push eax |
||
2007 | xor eax, eax |
||
2434 | Serge | 2008 | rep stosb |
83 | diamond | 2009 | pop eax |
2010 | pop ecx |
||
2011 | .writecommon: |
||
2012 | call hd_write |
||
2013 | cmp [hd_error], 0 |
||
2014 | jnz .writeerr |
||
2015 | inc eax |
||
2016 | sub dword [esp+8], ecx |
||
2017 | jz .writedone |
||
2018 | dec ebp |
||
2019 | jnz .write_sector |
||
2020 | ; allocate new cluster |
||
2021 | pop eax |
||
2022 | mov ecx, eax |
||
2023 | call get_free_FAT |
||
2024 | jc .diskfull |
||
2025 | push edx |
||
2026 | mov edx, [fatEND] |
||
2027 | call set_FAT |
||
2028 | xchg eax, ecx |
||
2029 | mov edx, ecx |
||
2030 | call set_FAT |
||
2031 | pop edx |
||
2032 | xchg eax, ecx |
||
2033 | jmp .write_cluster |
||
2034 | .diskfull: |
||
2035 | mov eax, ERROR_DISK_FULL |
||
2036 | jmp .ret |
||
2037 | .writeerr: |
||
2038 | pop eax |
||
2039 | sub esi, ecx |
||
2040 | mov eax, 11 |
||
2041 | jmp .ret |
||
2042 | .writedone: |
||
2043 | pop eax |
||
2044 | .done: |
||
2045 | xor eax, eax |
||
2046 | .ret: |
||
2047 | pop edi ecx |
||
2048 | mov ebx, esi |
||
2049 | sub ebx, edx |
||
2050 | pop ebp |
||
2051 | mov [esp+32+28], eax |
||
2052 | lea eax, [esp+8] |
||
2053 | call dword [eax+8] |
||
2054 | mov [edi+28], ebx |
||
2055 | call dword [eax+16] |
||
2056 | mov [esp+32+16], ebx |
||
2057 | lea eax, [ebx+511] |
||
2058 | shr eax, 9 |
||
2059 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2060 | lea eax, [eax+ecx-1] |
||
2061 | xor edx, edx |
||
2062 | div ecx |
||
2063 | mov ecx, ebp |
||
2064 | sub ecx, eax |
||
2065 | call add_disk_free_space |
||
2066 | add esp, 32 |
||
2067 | call update_disk |
||
2068 | popad |
||
2069 | ret |
||
321 | diamond | 2070 | .writedir: |
2071 | push 512 |
||
2072 | mov edi, buffer |
||
2073 | mov ebx, edi |
||
2074 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2075 | shl ecx, 9 |
||
2076 | cmp ecx, [esp+12] |
||
2077 | jnz .writedircont |
||
2078 | dec dword [esp+16] |
||
2079 | push esi |
||
2080 | mov ecx, 32/4 |
||
2434 | Serge | 2081 | rep movsd |
321 | diamond | 2082 | pop esi |
2083 | mov dword [edi-32], '. ' |
||
2084 | mov dword [edi-32+4], ' ' |
||
2085 | mov dword [edi-32+8], ' ' |
||
2086 | mov byte [edi-32+11], 10h |
||
2087 | push esi |
||
2088 | mov ecx, 32/4 |
||
2434 | Serge | 2089 | rep movsd |
321 | diamond | 2090 | pop esi |
2091 | mov dword [edi-32], '.. ' |
||
2092 | mov dword [edi-32+4], ' ' |
||
2093 | mov dword [edi-32+8], ' ' |
||
2094 | mov byte [edi-32+11], 10h |
||
2095 | mov ecx, [esp+20+8] |
||
2096 | cmp ecx, [ROOT_CLUSTER] |
||
2097 | jnz @f |
||
2098 | xor ecx, ecx |
||
2099 | @@: |
||
2100 | mov word [edi-32+26], cx |
||
2101 | shr ecx, 16 |
||
2102 | mov [edi-32+20], cx |
||
2103 | jmp .writedircont |
||
83 | diamond | 2104 | |
131 | diamond | 2105 | ;---------------------------------------------------------------- |
2106 | ; |
||
256 | diamond | 2107 | ; fs_HdWrite - LFN variant for writing to hard disk |
131 | diamond | 2108 | ; |
2109 | ; esi points to filename |
||
2110 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2111 | ; may be ebx=0 - start from first byte |
||
2112 | ; ecx number of bytes to write, 0+ |
||
2113 | ; edx mem location to data |
||
2114 | ; |
||
2115 | ; ret ebx = bytes written (maybe 0) |
||
2116 | ; eax = 0 ok write or other = errormsg |
||
2117 | ; |
||
2118 | ;-------------------------------------------------------------- |
||
2119 | fs_HdWrite.access_denied: |
||
2120 | push ERROR_ACCESS_DENIED |
||
2121 | fs_HdWrite.ret0: |
||
2122 | pop eax |
||
2123 | xor ebx, ebx |
||
2124 | ret |
||
2125 | |||
2126 | fs_HdWrite.ret11: |
||
2127 | push 11 |
||
2128 | jmp fs_HdWrite.ret0 |
||
2129 | |||
2130 | fs_HdWrite: |
||
256 | diamond | 2131 | cmp [fs_type], 1 |
2132 | jz ntfs_HdWrite |
||
2434 | Serge | 2133 | cmp [fs_type], 2 |
2134 | jz ext2_HdWrite |
||
256 | diamond | 2135 | cmp [fs_type], 16 |
2136 | jz @f |
||
2137 | cmp [fs_type], 32 |
||
2138 | jz @f |
||
131 | diamond | 2139 | push ERROR_UNKNOWN_FS |
2140 | jmp .ret0 |
||
2141 | @@: |
||
2142 | cmp byte [esi], 0 |
||
2143 | jz .access_denied |
||
2144 | pushad |
||
2145 | call hd_find_lfn |
||
2146 | pushfd |
||
2147 | cmp [hd_error], 0 |
||
2148 | jz @f |
||
2149 | popfd |
||
2150 | popad |
||
2151 | push 11 |
||
2152 | jmp .ret0 |
||
2153 | @@: |
||
2154 | popfd |
||
2155 | jnc .found |
||
2156 | popad |
||
2157 | push ERROR_FILE_NOT_FOUND |
||
2158 | jmp .ret0 |
||
2159 | .found: |
||
2160 | ; FAT does not support files larger than 4GB |
||
2161 | test ebx, ebx |
||
2162 | jz .l1 |
||
2163 | cmp dword [ebx+4], 0 |
||
2164 | jz @f |
||
2165 | .eof: |
||
2166 | popad |
||
2167 | push ERROR_END_OF_FILE |
||
2168 | jmp .ret0 |
||
2169 | @@: |
||
2170 | mov ebx, [ebx] |
||
2171 | .l1: |
||
2172 | ; now edi points to direntry, ebx=start byte to write, |
||
2173 | ; ecx=number of bytes to write, edx=data pointer |
||
2174 | |||
2175 | ; extend file if needed |
||
2176 | add ecx, ebx |
||
2177 | jc .eof ; FAT does not support files larger than 4GB |
||
2178 | push eax ; save directory sector |
||
2179 | push 0 ; return value=0 |
||
2180 | |||
2181 | call get_time_for_file |
||
2182 | mov [edi+22], ax ; last write time |
||
2183 | call get_date_for_file |
||
2184 | mov [edi+24], ax ; last write date |
||
2185 | mov [edi+18], ax ; last access date |
||
2186 | |||
2187 | push dword [edi+28] ; save current file size |
||
2188 | cmp ecx, [edi+28] |
||
2189 | jbe .length_ok |
||
2190 | cmp ecx, ebx |
||
2191 | jz .length_ok |
||
2192 | call hd_extend_file |
||
2193 | jnc .length_ok |
||
2194 | mov [esp+4], eax |
||
2195 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2196 | ; First two cases are fatal errors, in third case we may write some data |
||
2197 | cmp al, ERROR_DISK_FULL |
||
2198 | jz .disk_full |
||
2199 | pop eax |
||
2200 | pop eax |
||
2201 | mov [esp+4+28], eax |
||
2202 | pop eax |
||
2203 | popad |
||
2204 | xor ebx, ebx |
||
2205 | ret |
||
2206 | .disk_full: |
||
2207 | ; correct number of bytes to write |
||
2208 | mov ecx, [edi+28] |
||
2209 | cmp ecx, ebx |
||
2210 | ja .length_ok |
||
2211 | .ret: |
||
2212 | call update_disk |
||
2213 | cmp [hd_error], 0 |
||
2214 | jz @f |
||
2215 | mov byte [esp+4], 11 |
||
2216 | @@: |
||
2217 | pop eax |
||
2218 | pop eax |
||
2219 | mov [esp+4+28], eax ; eax=return value |
||
2220 | pop eax |
||
2221 | sub edx, [esp+20] |
||
2222 | mov [esp+16], edx ; ebx=number of written bytes |
||
2223 | popad |
||
2224 | ret |
||
2225 | .length_ok: |
||
2226 | mov esi, [edi+28] |
||
2227 | mov eax, [edi+20-2] |
||
2228 | mov ax, [edi+26] |
||
2229 | mov edi, eax ; edi=current cluster |
||
2230 | xor ebp, ebp ; ebp=current sector in cluster |
||
2231 | ; save directory |
||
2232 | mov eax, [esp+8] |
||
2233 | push ebx |
||
2234 | mov ebx, buffer |
||
2235 | call hd_write |
||
2236 | pop ebx |
||
2237 | cmp [hd_error], 0 |
||
2238 | jz @f |
||
2239 | .device_err: |
||
2240 | mov byte [esp+4], 11 |
||
2241 | jmp .ret |
||
2242 | @@: |
||
2243 | |||
2244 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
2245 | sub ecx, ebx |
||
2246 | jz .ret |
||
2247 | .write_loop: |
||
321 | diamond | 2248 | ; skip unmodified sectors |
2249 | cmp dword [esp], 0x200 |
||
2250 | jb .modify |
||
2251 | sub ebx, 0x200 |
||
2252 | jae .skip |
||
2253 | add ebx, 0x200 |
||
2254 | .modify: |
||
131 | diamond | 2255 | ; get length of data in current sector |
2256 | push ecx |
||
2257 | sub ebx, 0x200 |
||
2258 | jb .hasdata |
||
2259 | neg ebx |
||
2260 | xor ecx, ecx |
||
2261 | jmp @f |
||
2262 | .hasdata: |
||
2263 | neg ebx |
||
2264 | cmp ecx, ebx |
||
2265 | jbe @f |
||
2266 | mov ecx, ebx |
||
2267 | @@: |
||
2268 | ; get current sector number |
||
2269 | mov eax, edi |
||
2270 | dec eax |
||
2271 | dec eax |
||
2272 | imul eax, [SECTORS_PER_CLUSTER] |
||
2273 | add eax, [DATA_START] |
||
2274 | add eax, ebp |
||
2275 | ; load sector if needed |
||
2276 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
2277 | jz .noread |
||
2278 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2279 | jz .noread |
||
2280 | cmp ecx, esi ; (same for the last sector) |
||
2281 | jz .noread |
||
2282 | push ebx |
||
2283 | mov ebx, buffer |
||
2284 | call hd_read |
||
2285 | pop ebx |
||
2286 | cmp [hd_error], 0 |
||
2287 | jz @f |
||
2288 | .device_err2: |
||
2289 | pop ecx |
||
2290 | jmp .device_err |
||
2291 | @@: |
||
2292 | .noread: |
||
2293 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2294 | push eax ecx edi |
||
2295 | xor eax, eax |
||
2296 | mov ecx, 0x200 |
||
2297 | sub ecx, [esp+4+12] |
||
2298 | jbe @f |
||
2299 | mov edi, buffer |
||
2300 | add edi, [esp+4+12] |
||
2434 | Serge | 2301 | rep stosb |
131 | diamond | 2302 | @@: |
2303 | ; zero uninitialized data in the last sector |
||
2304 | mov ecx, 0x200 |
||
2305 | sub ecx, esi |
||
2306 | jbe @f |
||
2307 | mov edi, buffer |
||
2308 | add edi, esi |
||
2434 | Serge | 2309 | rep stosb |
131 | diamond | 2310 | @@: |
321 | diamond | 2311 | pop edi ecx |
131 | diamond | 2312 | ; copy new data |
2313 | mov eax, edx |
||
2314 | neg ebx |
||
2315 | jecxz @f |
||
2316 | add ebx, buffer+0x200 |
||
2317 | call memmove |
||
2318 | xor ebx, ebx |
||
2319 | @@: |
||
2320 | pop eax |
||
2321 | ; save sector |
||
2322 | push ebx |
||
2323 | mov ebx, buffer |
||
2324 | call hd_write |
||
2325 | pop ebx |
||
2326 | cmp [hd_error], 0 |
||
2327 | jnz .device_err2 |
||
2328 | add edx, ecx |
||
2329 | sub [esp], ecx |
||
2330 | pop ecx |
||
2331 | jz .ret |
||
321 | diamond | 2332 | .skip: |
131 | diamond | 2333 | ; next sector |
2334 | inc ebp |
||
2335 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2336 | jb @f |
||
2337 | xor ebp, ebp |
||
2338 | mov eax, edi |
||
2339 | call get_FAT |
||
2340 | mov edi, eax |
||
2341 | cmp [hd_error], 0 |
||
2342 | jnz .device_err |
||
2343 | @@: |
||
2344 | sub esi, 0x200 |
||
2345 | jae @f |
||
2346 | xor esi, esi |
||
2347 | @@: |
||
2348 | sub dword [esp], 0x200 |
||
2349 | jae @f |
||
2350 | and dword [esp], 0 |
||
2434 | Serge | 2351 | @@: |
2352 | jmp .write_loop |
||
131 | diamond | 2353 | |
2354 | hd_extend_file.zero_size: |
||
2355 | xor eax, eax |
||
2356 | jmp hd_extend_file.start_extend |
||
2357 | |||
2358 | ; extends file on hd to given size (new data area is undefined) |
||
2359 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 2360 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 2361 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
2362 | hd_extend_file: |
||
2363 | push ebp |
||
2364 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2365 | imul ebp, [BYTES_PER_SECTOR] |
||
2366 | push ecx |
||
2367 | ; find the last cluster of file |
||
2368 | mov eax, [edi+20-2] |
||
2369 | mov ax, [edi+26] |
||
2370 | mov ecx, [edi+28] |
||
2371 | jecxz .zero_size |
||
2372 | .last_loop: |
||
2373 | sub ecx, ebp |
||
2374 | jbe .last_found |
||
2375 | call get_FAT |
||
2376 | cmp [hd_error], 0 |
||
2377 | jz @f |
||
2378 | .device_err: |
||
2379 | pop ecx |
||
2380 | .device_err2: |
||
2381 | pop ebp |
||
2382 | push 11 |
||
2383 | .ret_err: |
||
2384 | pop eax |
||
2385 | stc |
||
2386 | ret |
||
2387 | @@: |
||
2388 | cmp eax, 2 |
||
2389 | jb .fat_err |
||
2390 | cmp eax, [fatRESERVED] |
||
2391 | jb .last_loop |
||
2392 | .fat_err: |
||
2393 | pop ecx ebp |
||
2394 | push ERROR_FAT_TABLE |
||
2395 | jmp .ret_err |
||
2396 | .last_found: |
||
2397 | push eax |
||
2398 | call get_FAT |
||
2399 | cmp [hd_error], 0 |
||
2400 | jz @f |
||
2401 | pop eax |
||
2402 | jmp .device_err |
||
2403 | @@: |
||
2404 | cmp eax, [fatRESERVED] |
||
2405 | pop eax |
||
2406 | jb .fat_err |
||
2407 | ; set length to full number of clusters |
||
2408 | sub [edi+28], ecx |
||
2409 | .start_extend: |
||
2410 | pop ecx |
||
2411 | ; now do extend |
||
2412 | push edx |
||
2413 | mov edx, 2 ; start scan from cluster 2 |
||
2414 | .extend_loop: |
||
2415 | cmp [edi+28], ecx |
||
2416 | jae .extend_done |
||
2417 | ; add new cluster |
||
2418 | push eax |
||
2419 | call get_free_FAT |
||
2420 | jc .disk_full |
||
2421 | mov edx, [fatEND] |
||
2422 | call set_FAT |
||
2423 | mov edx, eax |
||
2424 | pop eax |
||
2425 | test eax, eax |
||
2426 | jz .first_cluster |
||
2427 | push edx |
||
2428 | call set_FAT |
||
2429 | pop edx |
||
2430 | jmp @f |
||
2431 | .first_cluster: |
||
2432 | ror edx, 16 |
||
2433 | mov [edi+20], dx |
||
2434 | ror edx, 16 |
||
2435 | mov [edi+26], dx |
||
2436 | @@: |
||
133 | diamond | 2437 | push ecx |
2438 | mov ecx, -1 |
||
2439 | call add_disk_free_space |
||
2440 | pop ecx |
||
131 | diamond | 2441 | mov eax, edx |
2442 | cmp [hd_error], 0 |
||
2443 | jnz .device_err3 |
||
2444 | add [edi+28], ebp |
||
2445 | jmp .extend_loop |
||
2446 | .extend_done: |
||
2447 | mov [edi+28], ecx |
||
2448 | pop edx ebp |
||
133 | diamond | 2449 | xor eax, eax ; CF=0 |
131 | diamond | 2450 | ret |
2451 | .device_err3: |
||
2452 | pop edx |
||
2453 | jmp .device_err2 |
||
2454 | .disk_full: |
||
2455 | pop eax edx ebp |
||
2456 | push ERROR_DISK_FULL |
||
2457 | pop eax |
||
2458 | cmp [hd_error], 0 |
||
2459 | jz @f |
||
2460 | mov al, 11 |
||
2434 | Serge | 2461 | @@: |
2462 | stc |
||
131 | diamond | 2463 | ret |
2464 | |||
133 | diamond | 2465 | ;---------------------------------------------------------------- |
2466 | ; |
||
2467 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
2468 | ; |
||
2469 | ; esi points to filename |
||
2470 | ; ebx points to 64-bit number = new file size |
||
2471 | ; ecx ignored (reserved) |
||
2472 | ; edx ignored (reserved) |
||
2473 | ; |
||
2474 | ; ret eax = 0 ok or other = errormsg |
||
2475 | ; |
||
2476 | ;-------------------------------------------------------------- |
||
2477 | fs_HdSetFileEnd: |
||
256 | diamond | 2478 | cmp [fs_type], 1 |
2479 | jz ntfs_HdSetFileEnd |
||
2434 | Serge | 2480 | cmp [fs_type], 2 |
2481 | jz ext2_HdSetFileEnd |
||
256 | diamond | 2482 | cmp [fs_type], 16 |
2483 | jz @f |
||
2484 | cmp [fs_type], 32 |
||
2485 | jz @f |
||
133 | diamond | 2486 | push ERROR_UNKNOWN_FS |
2487 | .ret: |
||
2488 | pop eax |
||
2489 | ret |
||
2490 | @@: |
||
2491 | cmp byte [esi], 0 |
||
2492 | jnz @f |
||
2493 | .access_denied: |
||
2494 | push ERROR_ACCESS_DENIED |
||
2495 | jmp .ret |
||
2496 | @@: |
||
2497 | push edi |
||
2498 | call hd_find_lfn |
||
2499 | pushfd |
||
2500 | cmp [hd_error], 0 |
||
2501 | jz @f |
||
2502 | popfd |
||
2503 | push 11 |
||
2504 | jmp .ret |
||
2505 | @@: |
||
2506 | popfd |
||
2507 | jnc @f |
||
2508 | pop edi |
||
2509 | push ERROR_FILE_NOT_FOUND |
||
2510 | jmp .ret |
||
2511 | @@: |
||
2512 | ; must not be directory |
||
2513 | test byte [edi+11], 10h |
||
2514 | jz @f |
||
2515 | pop edi |
||
2516 | jmp .access_denied |
||
2517 | @@: |
||
2518 | ; file size must not exceed 4 Gb |
||
2519 | cmp dword [ebx+4], 0 |
||
2520 | jz @f |
||
2521 | pop edi |
||
2522 | push ERROR_END_OF_FILE |
||
2523 | jmp .ret |
||
2524 | @@: |
||
2525 | push eax ; save directory sector |
||
2526 | ; set file modification date/time to current |
||
2527 | call fat_update_datetime |
||
2528 | mov eax, [ebx] |
||
2529 | cmp eax, [edi+28] |
||
2530 | jb .truncate |
||
2531 | ja .expand |
||
2532 | pop eax |
||
2533 | mov ebx, buffer |
||
2534 | call hd_write |
||
2535 | pop edi |
||
2536 | xor eax, eax |
||
2537 | cmp [hd_error], 0 |
||
2538 | jz @f |
||
2539 | mov al, 11 |
||
2540 | @@: |
||
2541 | ret |
||
2542 | .expand: |
||
2543 | push ebx ebp ecx |
||
2544 | push dword [edi+28] ; save old size |
||
2545 | mov ecx, eax |
||
2546 | call hd_extend_file |
||
2547 | push eax ; return code |
||
2548 | jnc .expand_ok |
||
2549 | cmp al, ERROR_DISK_FULL |
||
2550 | jz .disk_full |
||
2551 | .pop_ret: |
||
2552 | call update_disk |
||
2553 | pop eax ecx ebp ebx ecx edi edi |
||
2554 | ret |
||
2555 | .expand_ok: |
||
2556 | .disk_full: |
||
2557 | ; save directory |
||
2558 | mov eax, [edi+28] |
||
2559 | xchg eax, [esp+20] |
||
2560 | mov ebx, buffer |
||
2561 | call hd_write |
||
2562 | mov eax, [edi+20-2] |
||
2563 | mov ax, [edi+26] |
||
2564 | mov edi, eax |
||
2565 | cmp [hd_error], 0 |
||
2566 | jz @f |
||
2567 | .pop_ret11: |
||
2568 | mov byte [esp], 11 |
||
2569 | jmp .pop_ret |
||
2570 | @@: |
||
2571 | ; now zero new data |
||
2572 | xor ebp, ebp |
||
2573 | ; edi=current cluster, ebp=sector in cluster |
||
2574 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
||
2575 | .zero_loop: |
||
2576 | sub dword [esp+4], 0x200 |
||
2577 | jae .next_cluster |
||
2578 | lea eax, [edi-2] |
||
2579 | imul eax, [SECTORS_PER_CLUSTER] |
||
2580 | add eax, [DATA_START] |
||
2581 | add eax, ebp |
||
2582 | cmp dword [esp+4], -0x200 |
||
2583 | jz .noread |
||
2584 | mov ebx, buffer |
||
2585 | call hd_read |
||
2586 | cmp [hd_error], 0 |
||
2587 | jnz .err_next |
||
2588 | .noread: |
||
2589 | mov ecx, [esp+4] |
||
2590 | neg ecx |
||
2591 | push edi |
||
2592 | mov edi, buffer+0x200 |
||
2593 | add edi, [esp+8] |
||
2594 | push eax |
||
2595 | xor eax, eax |
||
2596 | mov [esp+12], eax |
||
2434 | Serge | 2597 | rep stosb |
133 | diamond | 2598 | pop eax |
2599 | pop edi |
||
2600 | call hd_write |
||
2601 | cmp [hd_error], 0 |
||
2602 | jz .next_cluster |
||
2603 | .err_next: |
||
2604 | mov byte [esp], 11 |
||
2605 | .next_cluster: |
||
2606 | sub dword [esp+20], 0x200 |
||
2607 | jbe .pop_ret |
||
2608 | inc ebp |
||
2609 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2610 | jb .zero_loop |
||
2611 | xor ebp, ebp |
||
2612 | mov eax, edi |
||
2613 | call get_FAT |
||
2614 | mov edi, eax |
||
2615 | cmp [hd_error], 0 |
||
2616 | jnz .pop_ret11 |
||
2617 | jmp .zero_loop |
||
2618 | .truncate: |
||
2619 | mov [edi+28], eax |
||
2620 | push ecx |
||
2621 | mov ecx, [edi+20-2] |
||
2622 | mov cx, [edi+26] |
||
2623 | push eax |
||
2624 | test eax, eax |
||
2625 | jz .zero_size |
||
2626 | ; find new last cluster |
||
2627 | @@: |
||
2628 | mov eax, [SECTORS_PER_CLUSTER] |
||
2629 | shl eax, 9 |
||
2630 | sub [esp], eax |
||
2631 | jbe @f |
||
2632 | mov eax, ecx |
||
2633 | call get_FAT |
||
2634 | mov ecx, eax |
||
2635 | cmp [hd_error], 0 |
||
2636 | jz @b |
||
2637 | .device_err3: |
||
2638 | pop eax ecx eax edi |
||
2639 | push 11 |
||
2640 | pop eax |
||
2641 | ret |
||
2642 | @@: |
||
2643 | ; we will zero data at the end of last sector - remember it |
||
2644 | push ecx |
||
2645 | ; terminate FAT chain |
||
2646 | push edx |
||
2647 | mov eax, ecx |
||
2648 | mov edx, [fatEND] |
||
2649 | call set_FAT |
||
2650 | mov eax, edx |
||
2651 | pop edx |
||
2652 | cmp [hd_error], 0 |
||
2653 | jz @f |
||
2654 | .device_err4: |
||
2655 | pop ecx |
||
2656 | jmp .device_err3 |
||
2657 | .zero_size: |
||
2658 | and word [edi+20], 0 |
||
2659 | and word [edi+26], 0 |
||
2660 | push 0 |
||
2661 | mov eax, ecx |
||
2662 | @@: |
||
2663 | ; delete FAT chain |
||
2664 | call clear_cluster_chain |
||
2665 | cmp [hd_error], 0 |
||
2666 | jnz .device_err4 |
||
2667 | ; save directory |
||
2668 | mov eax, [esp+12] |
||
2669 | push ebx |
||
2670 | mov ebx, buffer |
||
2671 | call hd_write |
||
2672 | pop ebx |
||
2673 | cmp [hd_error], 0 |
||
2674 | jnz .device_err4 |
||
2675 | ; zero last sector, ignore errors |
||
2676 | pop ecx |
||
2677 | pop eax |
||
2678 | dec ecx |
||
2679 | imul ecx, [SECTORS_PER_CLUSTER] |
||
2680 | add ecx, [DATA_START] |
||
2681 | push eax |
||
2682 | sar eax, 9 |
||
2683 | add ecx, eax |
||
2684 | pop eax |
||
2685 | and eax, 0x1FF |
||
2686 | jz .truncate_done |
||
2687 | push ebx eax |
||
2688 | mov eax, ecx |
||
2689 | mov ebx, buffer |
||
2690 | call hd_read |
||
2691 | pop eax |
||
2692 | lea edi, [buffer+eax] |
||
2693 | push ecx |
||
2694 | mov ecx, 0x200 |
||
2695 | sub ecx, eax |
||
2696 | xor eax, eax |
||
2434 | Serge | 2697 | rep stosb |
133 | diamond | 2698 | pop eax |
2699 | call hd_write |
||
2700 | pop ebx |
||
2701 | .truncate_done: |
||
2702 | pop ecx eax edi |
||
2703 | call update_disk |
||
2704 | xor eax, eax |
||
2705 | cmp [hd_error], 0 |
||
2706 | jz @f |
||
2707 | mov al, 11 |
||
2708 | @@: |
||
2709 | ret |
||
2710 | |||
86 | diamond | 2711 | fs_HdGetFileInfo: |
256 | diamond | 2712 | cmp [fs_type], 1 |
2713 | jz ntfs_HdGetFileInfo |
||
2434 | Serge | 2714 | cmp [fs_type], 2 |
2715 | jz ext2_HdGetFileInfo |
||
256 | diamond | 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 | jmp fs_GetFileInfo_finish |
||
2740 | |||
2741 | fs_HdSetFileInfo: |
||
256 | diamond | 2742 | cmp [fs_type], 1 |
2743 | jz ntfs_HdSetFileInfo |
||
1378 | turbanoff | 2744 | cmp [fs_type], 2 |
2745 | jz ext2_HdSetFileInfo |
||
256 | diamond | 2746 | cmp [fs_type], 16 |
2747 | jz @f |
||
2748 | cmp [fs_type], 32 |
||
2749 | jz @f |
||
86 | diamond | 2750 | mov eax, ERROR_UNKNOWN_FS |
2751 | ret |
||
2752 | @@: |
||
2753 | cmp byte [esi], 0 |
||
2754 | jnz @f |
||
2755 | mov eax, 2 |
||
2756 | ret |
||
2757 | @@: |
||
2758 | push edi |
||
2759 | call hd_find_lfn |
||
2760 | pushfd |
||
2761 | cmp [hd_error], 0 |
||
2762 | jz @f |
||
2763 | popfd |
||
2764 | pop edi |
||
2765 | mov eax, 11 |
||
2766 | ret |
||
2767 | @@: |
||
2768 | popfd |
||
2769 | jnc @f |
||
2770 | pop edi |
||
2771 | mov eax, ERROR_FILE_NOT_FOUND |
||
2772 | ret |
||
2773 | @@: |
||
2774 | push eax |
||
2775 | call bdfe_to_fat_entry |
||
2776 | pop eax |
||
2777 | mov ebx, buffer |
||
2778 | call hd_write |
||
2779 | call update_disk |
||
2780 | pop edi |
||
2781 | xor eax, eax |
||
2782 | ret |
||
2783 | |||
91 | diamond | 2784 | ;---------------------------------------------------------------- |
2785 | ; |
||
171 | diamond | 2786 | ; fs_HdDelete - delete file or empty folder from hard disk |
2787 | ; |
||
2788 | ; esi points to filename |
||
2789 | ; |
||
2790 | ; ret eax = 0 ok or other = errormsg |
||
2791 | ; |
||
2792 | ;-------------------------------------------------------------- |
||
2793 | fs_HdDelete: |
||
256 | diamond | 2794 | cmp [fs_type], 1 |
2795 | jz ntfs_HdDelete |
||
2106 | serge | 2796 | cmp [fs_type], 2 |
1378 | turbanoff | 2797 | jz ext2_HdDelete |
256 | diamond | 2798 | cmp [fs_type], 16 |
2799 | jz @f |
||
2800 | cmp [fs_type], 32 |
||
2801 | jz @f |
||
171 | diamond | 2802 | push ERROR_UNKNOWN_FS |
2803 | .pop_ret: |
||
2804 | pop eax |
||
2805 | ret |
||
2806 | @@: |
||
2807 | cmp byte [esi], 0 |
||
2808 | jnz @f |
||
2809 | ; cannot delete root! |
||
2810 | .access_denied: |
||
2811 | push ERROR_ACCESS_DENIED |
||
2812 | jmp .pop_ret |
||
2813 | @@: |
||
2814 | and [longname_sec1], 0 |
||
2815 | and [longname_sec2], 0 |
||
2816 | push edi |
||
2817 | call hd_find_lfn |
||
2818 | jnc .found |
||
2819 | pop edi |
||
2820 | push ERROR_FILE_NOT_FOUND |
||
2821 | jmp .pop_ret |
||
2822 | .found: |
||
2823 | cmp dword [edi], '. ' |
||
2824 | jz .access_denied2 |
||
2825 | cmp dword [edi], '.. ' |
||
2826 | jz .access_denied2 |
||
2827 | test byte [edi+11], 10h |
||
2828 | jz .dodel |
||
2829 | ; we can delete only empty folders! |
||
2830 | pushad |
||
2831 | mov ebp, [edi+20-2] |
||
2832 | mov bp, [edi+26] |
||
2833 | xor ecx, ecx |
||
2834 | lea eax, [ebp-2] |
||
2835 | imul eax, [SECTORS_PER_CLUSTER] |
||
2836 | add eax, [DATA_START] |
||
2837 | mov ebx, buffer |
||
2838 | call hd_read |
||
2839 | cmp [hd_error], 0 |
||
2840 | jnz .err1 |
||
2841 | add ebx, 2*0x20 |
||
2842 | .checkempty: |
||
2843 | cmp byte [ebx], 0 |
||
2844 | jz .empty |
||
2845 | cmp byte [ebx], 0xE5 |
||
2846 | jnz .notempty |
||
2847 | add ebx, 0x20 |
||
2848 | cmp ebx, buffer+0x200 |
||
2849 | jb .checkempty |
||
2850 | inc ecx |
||
2851 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
2852 | jb @f |
||
2853 | mov eax, ebp |
||
2854 | call get_FAT |
||
2855 | cmp [hd_error], 0 |
||
2856 | jnz .err1 |
||
2857 | mov ebp, eax |
||
2858 | xor ecx, ecx |
||
2859 | @@: |
||
2860 | lea eax, [ebp-2] |
||
2861 | imul eax, [SECTORS_PER_CLUSTER] |
||
2862 | add eax, [DATA_START] |
||
2863 | add eax, ecx |
||
2864 | mov ebx, buffer |
||
2865 | call hd_read |
||
2866 | cmp [hd_error], 0 |
||
2867 | jz .checkempty |
||
2868 | .err1: |
||
2869 | popad |
||
2870 | .err2: |
||
2871 | pop edi |
||
2872 | push 11 |
||
2873 | pop eax |
||
2874 | ret |
||
2875 | .notempty: |
||
2876 | popad |
||
2877 | .access_denied2: |
||
2878 | pop edi |
||
2879 | push ERROR_ACCESS_DENIED |
||
2880 | pop eax |
||
2881 | ret |
||
2882 | .empty: |
||
2883 | popad |
||
2884 | push ebx |
||
2885 | mov ebx, buffer |
||
2886 | call hd_read |
||
2887 | pop ebx |
||
2888 | cmp [hd_error], 0 |
||
2889 | jnz .err2 |
||
2890 | .dodel: |
||
2891 | push eax |
||
2892 | mov eax, [edi+20-2] |
||
2893 | mov ax, [edi+26] |
||
2894 | xchg eax, [esp] |
||
2895 | ; delete folder entry |
||
2896 | mov byte [edi], 0xE5 |
||
2897 | ; delete LFN (if present) |
||
2898 | .lfndel: |
||
2899 | cmp edi, buffer |
||
2900 | ja @f |
||
2901 | cmp [longname_sec2], 0 |
||
2902 | jz .lfndone |
||
2903 | push [longname_sec2] |
||
2904 | push [longname_sec1] |
||
2905 | pop [longname_sec2] |
||
2906 | and [longname_sec1], 0 |
||
2907 | push ebx |
||
2908 | mov ebx, buffer |
||
2909 | call hd_write |
||
2910 | mov eax, [esp+4] |
||
2911 | call hd_read |
||
2912 | pop ebx |
||
2913 | pop eax |
||
2914 | mov edi, buffer+0x200 |
||
2915 | @@: |
||
2916 | sub edi, 0x20 |
||
2917 | cmp byte [edi], 0xE5 |
||
2918 | jz .lfndone |
||
2919 | cmp byte [edi+11], 0xF |
||
2920 | jnz .lfndone |
||
2921 | mov byte [edi], 0xE5 |
||
2922 | jmp .lfndel |
||
2923 | .lfndone: |
||
2924 | push ebx |
||
2925 | mov ebx, buffer |
||
2926 | call hd_write |
||
2927 | pop ebx |
||
2928 | ; delete FAT chain |
||
2929 | pop eax |
||
2930 | call clear_cluster_chain |
||
2931 | call update_disk |
||
2932 | pop edi |
||
2933 | xor eax, eax |
||
2934 | cmp [hd_error], 0 |
||
2935 | jz @f |
||
2936 | mov al, 11 |
||
2937 | @@: |
||
2938 | ret |
||
2939 | |||
1379 | turbanoff | 2940 | ; \end{diamond}=>=>>> |