Rev 848 | 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 | ;; ;; |
495 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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465 | serge | 6 | ;; FAT32.INC ;; |
7 | ;; ;; |
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8 | ;; FAT16/32 functions for KolibriOS ;; |
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9 | ;; ;; |
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10 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
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11 | ;; ;; |
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12 | ;; See file COPYING for details ;; |
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13 | ;; 04.02.2007 LFN create folder - diamond ;; |
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14 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
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15 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
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16 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
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17 | ;; 23.06.2006 LFN start application - diamond ;; |
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18 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
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19 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
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20 | ;; 04.05.2006 LFN read folder - diamond ;; |
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21 | ;; 29.04.2006 Elimination of hangup after the ;; |
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22 | ;; expiration hd_wait_timeout - Mario79 ;; |
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23 | ;; 23.04.2006 LFN read file - diamond ;; |
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24 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
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25 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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26 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
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27 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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28 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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29 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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30 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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31 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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32 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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33 | ;; 08.11.2004 rename - ATV ;; |
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34 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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35 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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36 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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37 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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38 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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39 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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40 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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41 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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42 | ;; 20.5.2002 Hd status check - VT ;; |
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43 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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44 | ;; ;; |
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593 | mikedld | 45 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ha | 46 | |
593 | mikedld | 47 | $Revision: 2971 $ |
48 | |||
49 | |||
1 | ha | 50 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
51 | |||
52 | mikedld | 52 | ERROR_SUCCESS = 0 |
53 | ERROR_DISK_BASE = 1 |
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54 | ERROR_UNSUPPORTED_FS = 2 |
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55 | ERROR_UNKNOWN_FS = 3 |
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56 | ERROR_PARTITION = 4 |
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57 | ERROR_FILE_NOT_FOUND = 5 |
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58 | ERROR_END_OF_FILE = 6 |
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59 | ERROR_MEMORY_POINTER = 7 |
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60 | ERROR_DISK_FULL = 8 |
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61 | ERROR_FAT_TABLE = 9 |
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62 | ERROR_ACCESS_DENIED = 10 |
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1 | ha | 63 | |
64 | PUSHAD_EAX equ [esp+28] |
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65 | PUSHAD_ECX equ [esp+24] |
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66 | PUSHAD_EDX equ [esp+20] |
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67 | PUSHAD_EBX equ [esp+16] |
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68 | PUSHAD_EBP equ [esp+8] |
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69 | PUSHAD_ESI equ [esp+4] |
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70 | PUSHAD_EDI equ [esp+0] |
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71 | |||
171 | diamond | 72 | uglobal |
73 | align 4 |
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1 | ha | 74 | partition_count dd 0 ; partitions found by set_FAT32_variables |
75 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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76 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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77 | |||
78 | hd_error dd 0 ; set by wait_for_sector_buffer |
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79 | hd_setup dd 0 |
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80 | hd_wait_timeout dd 0 |
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81 | |||
82 | cluster_tmp dd 0 ; used by analyze_directory |
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83 | ; and analyze_directory_to_write |
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84 | |||
85 | file_size dd 0 ; used by file_read |
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86 | |||
87 | cache_search_start dd 0 ; used by find_empty_slot |
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171 | diamond | 88 | endg |
1 | ha | 89 | |
171 | diamond | 90 | iglobal |
1 | ha | 91 | fat_in_cache dd -1 |
171 | diamond | 92 | endg |
1 | ha | 93 | |
94 | uglobal |
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171 | diamond | 95 | align 4 |
96 | fat_cache: times 512 db 0 |
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1 | ha | 97 | Sector512: ; label for dev_hdcd.inc |
98 | buffer: times 512 db 0 |
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133 | diamond | 99 | fsinfo_buffer: times 512 db 0 |
1 | ha | 100 | endg |
101 | |||
102 | uglobal |
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103 | fat16_root db 0 ; flag for fat16 rootdir |
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104 | fat_change db 0 ; 1=fat has changed |
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105 | endg |
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106 | |||
107 | reserve_hd1: |
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108 | |||
848 | serge | 109 | pushfd |
1 | ha | 110 | cli |
848 | serge | 111 | |
112 | cmp [hd1_status],0 ;FIXME use mutex |
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1 | ha | 113 | je reserve_ok1 |
114 | |||
848 | serge | 115 | popfd |
116 | |||
1 | ha | 117 | call change_task |
118 | jmp reserve_hd1 |
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119 | |||
120 | reserve_ok1: |
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121 | |||
122 | push eax |
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379 | serge | 123 | mov eax,[CURRENT_TASK] |
1 | ha | 124 | shl eax,5 |
379 | serge | 125 | mov eax,[eax+CURRENT_TASK+TASKDATA.pid] |
1 | ha | 126 | mov [hd1_status],eax |
127 | pop eax |
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848 | serge | 128 | popfd |
1 | ha | 129 | ret |
95 | mario79 | 130 | ;******************************************** |
321 | diamond | 131 | |
132 | uglobal |
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133 | hd_in_cache db ? |
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134 | endg |
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135 | |||
95 | mario79 | 136 | reserve_hd_channel: |
709 | diamond | 137 | ; BIOS disk accesses are protected with common mutex hd1_status |
138 | ; This must be modified when hd1_status will not be valid! |
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139 | cmp [hdpos], 0x80 |
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140 | jae .ret |
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95 | mario79 | 141 | cmp [hdbase], 0x1F0 |
142 | jne .IDE_Channel_2 |
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143 | .IDE_Channel_1: |
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848 | serge | 144 | pushfd |
95 | mario79 | 145 | cli |
146 | cmp [IDE_Channel_1],0 |
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147 | je .reserve_ok_1 |
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848 | serge | 148 | popfd |
95 | mario79 | 149 | call change_task |
150 | jmp .IDE_Channel_1 |
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151 | .IDE_Channel_2: |
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848 | serge | 152 | pushfd |
95 | mario79 | 153 | cli |
154 | cmp [IDE_Channel_2],0 |
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155 | je .reserve_ok_2 |
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848 | serge | 156 | popfd |
95 | mario79 | 157 | call change_task |
321 | diamond | 158 | jmp .IDE_Channel_2 |
95 | mario79 | 159 | .reserve_ok_1: |
321 | diamond | 160 | mov [IDE_Channel_1], 1 |
848 | serge | 161 | popfd |
321 | diamond | 162 | push eax |
163 | mov al, 1 |
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164 | jmp @f |
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95 | mario79 | 165 | .reserve_ok_2: |
321 | diamond | 166 | mov [IDE_Channel_2], 1 |
848 | serge | 167 | popfd |
321 | diamond | 168 | push eax |
169 | mov al, 3 |
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170 | @@: |
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171 | cmp [hdid], 1 |
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172 | sbb al, -1 |
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173 | cmp al, [hd_in_cache] |
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174 | jz @f |
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175 | mov [hd_in_cache], al |
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176 | call clear_hd_cache |
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177 | @@: |
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178 | pop eax |
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709 | diamond | 179 | .ret: |
321 | diamond | 180 | ret |
181 | |||
95 | mario79 | 182 | free_hd_channel: |
709 | diamond | 183 | ; see comment at reserve_hd_channel |
184 | cmp [hdpos], 0x80 |
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185 | jae .ret |
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95 | mario79 | 186 | cmp [hdbase], 0x1F0 |
187 | jne .IDE_Channel_2 |
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188 | .IDE_Channel_1: |
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189 | mov [IDE_Channel_1],0 |
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709 | diamond | 190 | .ret: |
95 | mario79 | 191 | ret |
192 | .IDE_Channel_2: |
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193 | mov [IDE_Channel_2],0 |
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194 | ret |
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195 | ;******************************************** |
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379 | serge | 196 | problem_partition db 0 ; used for partitions search |
1 | ha | 197 | |
65 | mario79 | 198 | include 'part_set.inc' |
1 | ha | 199 | |
200 | set_FAT: |
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201 | ;-------------------------------- |
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202 | ; input : EAX = cluster |
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203 | ; EDX = value to save |
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204 | ; output : EDX = old value |
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205 | ;-------------------------------- |
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206 | push eax ebx esi |
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207 | |||
208 | cmp eax,2 |
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209 | jb sfc_error |
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210 | cmp eax,[LAST_CLUSTER] |
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211 | ja sfc_error |
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256 | diamond | 212 | cmp [fs_type],16 |
1 | ha | 213 | je sfc_1 |
214 | add eax,eax |
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215 | sfc_1: |
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216 | add eax,eax |
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217 | mov esi,511 |
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218 | and esi,eax ; esi = position in fat sector |
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219 | shr eax,9 ; eax = fat sector |
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220 | add eax,[FAT_START] |
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221 | mov ebx,fat_cache |
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222 | |||
223 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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224 | je sfc_in_cache ; yes |
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225 | |||
226 | cmp [fat_change],0 ; is fat changed? |
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227 | je sfc_no_change ; no |
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228 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 229 | cmp [hd_error],0 |
230 | jne sfc_error |
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1 | ha | 231 | |
232 | sfc_no_change: |
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233 | mov [fat_in_cache],eax ; save fat sector |
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234 | call hd_read |
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74 | mario79 | 235 | cmp [hd_error],0 |
236 | jne sfc_error |
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1 | ha | 237 | |
379 | serge | 238 | |
1 | ha | 239 | sfc_in_cache: |
256 | diamond | 240 | cmp [fs_type],16 |
1 | ha | 241 | jne sfc_test32 |
242 | |||
243 | sfc_set16: |
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244 | xchg [ebx+esi],dx ; save new value and get old value |
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245 | jmp sfc_write |
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246 | |||
247 | sfc_test32: |
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248 | mov eax,[fatMASK] |
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249 | |||
250 | sfc_set32: |
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251 | and edx,eax |
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252 | xor eax,-1 ; mask for high bits |
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253 | and eax,[ebx+esi] ; get high 4 bits |
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254 | or eax,edx |
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255 | mov edx,[ebx+esi] ; get old value |
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256 | mov [ebx+esi],eax ; save new value |
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257 | |||
258 | sfc_write: |
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259 | mov [fat_change],1 ; fat has changed |
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260 | |||
261 | sfc_nonzero: |
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262 | and edx,[fatMASK] |
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263 | |||
264 | sfc_error: |
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265 | pop esi ebx eax |
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266 | ret |
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267 | |||
268 | |||
269 | get_FAT: |
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270 | ;-------------------------------- |
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271 | ; input : EAX = cluster |
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272 | ; output : EAX = next cluster |
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273 | ;-------------------------------- |
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274 | push ebx esi |
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275 | |||
256 | diamond | 276 | cmp [fs_type],16 |
1 | ha | 277 | je gfc_1 |
278 | add eax,eax |
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279 | gfc_1: |
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280 | add eax,eax |
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281 | mov esi,511 |
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282 | and esi,eax ; esi = position in fat sector |
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283 | shr eax,9 ; eax = fat sector |
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284 | add eax,[FAT_START] |
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285 | mov ebx,fat_cache |
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286 | |||
287 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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288 | je gfc_in_cache |
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289 | |||
290 | cmp [fat_change],0 ; is fat changed? |
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291 | je gfc_no_change ; no |
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292 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 293 | cmp [hd_error],0 |
294 | jne hd_error_01 |
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1 | ha | 295 | |
296 | gfc_no_change: |
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297 | mov [fat_in_cache],eax |
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298 | call hd_read |
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74 | mario79 | 299 | cmp [hd_error],0 |
300 | jne hd_error_01 |
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1 | ha | 301 | |
302 | gfc_in_cache: |
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303 | mov eax,[ebx+esi] |
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304 | and eax,[fatMASK] |
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74 | mario79 | 305 | hd_error_01: |
1 | ha | 306 | pop esi ebx |
307 | ret |
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308 | |||
309 | |||
310 | get_free_FAT: |
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311 | ;----------------------------------------------------------- |
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312 | ; output : if CARRY=0 EAX = # first cluster found free |
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313 | ; if CARRY=1 disk full |
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314 | ; Note : for more speed need to use fat_cache directly |
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315 | ;----------------------------------------------------------- |
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316 | push ecx |
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317 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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318 | sub ecx,2 |
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649 | diamond | 319 | mov eax,[fatStartScan] |
320 | cmp eax,2 |
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321 | jb gff_reset |
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1 | ha | 322 | |
323 | gff_test: |
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324 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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325 | jbe gff_in_range |
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649 | diamond | 326 | gff_reset: |
1 | ha | 327 | mov eax,2 |
328 | |||
329 | gff_in_range: |
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330 | push eax |
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331 | call get_FAT ; get cluster state |
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74 | mario79 | 332 | cmp [hd_error],0 |
333 | jne gff_not_found_1 |
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334 | |||
1 | ha | 335 | test eax,eax ; is it free? |
336 | pop eax |
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337 | je gff_found ; yes |
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338 | inc eax ; next cluster |
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339 | dec ecx ; is all checked? |
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340 | jns gff_test ; no |
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341 | |||
74 | mario79 | 342 | gff_not_found_1: |
343 | add esp,4 |
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1 | ha | 344 | gff_not_found: |
345 | pop ecx ; yes. disk is full |
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346 | stc |
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347 | ret |
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348 | |||
349 | gff_found: |
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649 | diamond | 350 | lea ecx,[eax+1] |
351 | mov [fatStartScan],ecx |
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1 | ha | 352 | pop ecx |
353 | clc |
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354 | ret |
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355 | |||
356 | |||
357 | write_fat_sector: |
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358 | ;----------------------------------------------------------- |
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359 | ; write changed fat to disk |
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360 | ;----------------------------------------------------------- |
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361 | push eax ebx ecx |
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362 | |||
363 | mov [fat_change],0 |
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364 | mov eax,[fat_in_cache] |
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365 | cmp eax,-1 |
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366 | jz write_fat_not_used |
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367 | mov ebx,fat_cache |
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368 | mov ecx,[NUMBER_OF_FATS] |
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369 | |||
370 | write_next_fat: |
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371 | call hd_write |
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74 | mario79 | 372 | cmp [hd_error],0 |
373 | jne write_fat_not_used |
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374 | |||
1 | ha | 375 | add eax,[SECTORS_PER_FAT] |
376 | dec ecx |
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377 | jnz write_next_fat |
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378 | |||
379 | write_fat_not_used: |
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380 | pop ecx ebx eax |
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381 | ret |
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382 | |||
383 | |||
384 | analyze_directory: |
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385 | ;----------------------------------------------------------- |
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386 | ; input : EAX = first cluster of the directory |
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387 | ; EBX = pointer to filename |
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388 | ; output : IF CARRY=0 EAX = sector where th file is found |
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389 | ; EBX = pointer in buffer |
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390 | ; [buffer .. buffer+511] |
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391 | ; ECX,EDX,ESI,EDI not changed |
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392 | ; IF CARRY=1 filename not found |
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393 | ; Note : if cluster=0 it's changed to read rootdir |
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394 | ; save 2 previous directory sectors in longname_sec |
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395 | ;----------------------------------------------------------- |
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396 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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397 | mov [longname_sec1],0 |
||
398 | mov [longname_sec2],0 |
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399 | |||
400 | adr_new_cluster: |
||
401 | mov [cluster_tmp],eax |
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402 | mov [fat16_root],0 |
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403 | cmp eax,[LAST_CLUSTER] |
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404 | ja adr_not_found ; too big cluster number, something is wrong |
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405 | cmp eax,2 |
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406 | jnb adr_data_cluster |
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407 | |||
408 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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256 | diamond | 409 | cmp [fs_type],16 |
1 | ha | 410 | jne adr_data_cluster |
411 | mov eax,[ROOT_START] |
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412 | mov edx,[ROOT_SECTORS] |
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413 | mov [fat16_root],1 ; flag for fat16 rootdir |
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414 | jmp adr_new_sector |
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415 | |||
416 | adr_data_cluster: |
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417 | sub eax,2 |
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418 | mov edx,[SECTORS_PER_CLUSTER] |
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419 | imul eax,edx |
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420 | add eax,[DATA_START] |
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421 | |||
422 | adr_new_sector: |
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423 | mov ebx,buffer |
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424 | call hd_read |
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74 | mario79 | 425 | cmp [hd_error],0 |
426 | jne adr_not_found |
||
427 | |||
1 | ha | 428 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
429 | |||
430 | adr_analyze: |
||
431 | mov edi,[ebx+11] ; file attribute |
||
432 | and edi,0xf |
||
433 | cmp edi,0xf |
||
434 | je adr_long_filename |
||
435 | test edi,0x8 ; skip over volume label |
||
436 | jne adr_long_filename ; Note: label can be same name as file/dir |
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437 | |||
438 | mov esi,[esp+0] ; filename need to be uppercase |
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439 | mov edi,ebx |
||
440 | push ecx |
||
441 | mov ecx,11 |
||
442 | cld |
||
443 | rep cmpsb ; compare 8+3 filename |
||
444 | pop ecx |
||
445 | je adr_found |
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446 | |||
447 | adr_long_filename: |
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448 | add ebx,32 ; position of next dir entry |
||
449 | dec ecx |
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450 | jnz adr_analyze |
||
451 | |||
452 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
||
453 | mov [longname_sec1],eax ; for delete long filename |
||
454 | mov [longname_sec2],ecx |
||
455 | inc eax ; next sector |
||
456 | dec edx |
||
457 | jne adr_new_sector |
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458 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
459 | je adr_not_found |
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460 | |||
461 | adr_next_cluster: |
||
462 | mov eax,[cluster_tmp] |
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463 | call get_FAT ; get next cluster |
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74 | mario79 | 464 | cmp [hd_error],0 |
465 | jne adr_not_found |
||
466 | |||
1 | ha | 467 | cmp eax,2 ; incorrect fat chain? |
468 | jb adr_not_found ; yes |
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469 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
470 | jb adr_new_cluster ; no. analyse it |
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471 | |||
472 | adr_not_found: |
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473 | pop edi edi esi edx ecx ; first edi will remove ebx |
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474 | stc ; file not found |
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475 | ret |
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476 | |||
477 | adr_found: |
||
478 | pop edi edi esi edx ecx ; first edi will remove ebx |
||
479 | clc ; file found |
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480 | ret |
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481 | |||
482 | |||
483 | get_data_cluster: |
||
484 | ;----------------------------------------------------------- |
||
485 | ; input : EAX = cluster |
||
486 | ; EBX = pointer to buffer |
||
487 | ; EDX = # blocks to read in buffer |
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488 | ; ESI = # blocks to skip over |
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489 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
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490 | ; if CARRY=1 cluster out of range |
||
491 | ; Note : if cluster=0 it's changed to read rootdir |
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492 | ;----------------------------------------------------------- |
||
493 | push eax ecx |
||
494 | |||
495 | mov [fat16_root],0 |
||
496 | cmp eax,[LAST_CLUSTER] |
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497 | ja gdc_error ; too big cluster number, something is wrong |
||
498 | cmp eax,2 |
||
499 | jnb gdc_cluster |
||
500 | |||
501 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
256 | diamond | 502 | cmp [fs_type],16 |
1 | ha | 503 | jne gdc_cluster |
504 | mov eax,[ROOT_START] |
||
505 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
506 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
507 | jmp gdc_read |
||
508 | |||
509 | gdc_cluster: |
||
510 | sub eax,2 |
||
511 | mov ecx,[SECTORS_PER_CLUSTER] |
||
512 | imul eax,ecx |
||
513 | add eax,[DATA_START] |
||
514 | |||
515 | gdc_read: |
||
516 | test esi,esi ; first wanted block |
||
517 | je gdcl1 ; yes, skip count is 0 |
||
518 | dec esi |
||
519 | jmp gdcl2 |
||
520 | |||
521 | gdcl1: |
||
522 | call hd_read |
||
74 | mario79 | 523 | cmp [hd_error],0 |
379 | serge | 524 | jne gdc_error |
74 | mario79 | 525 | |
1 | ha | 526 | add ebx,512 ; update pointer |
527 | dec edx |
||
528 | |||
529 | gdcl2: |
||
530 | test edx,edx ; is all read? |
||
531 | je out_of_read |
||
532 | |||
533 | inc eax ; next sector |
||
534 | dec ecx |
||
535 | jnz gdc_read |
||
536 | |||
537 | out_of_read: |
||
538 | pop ecx eax |
||
539 | clc |
||
540 | ret |
||
541 | |||
542 | gdc_error: |
||
543 | pop ecx eax |
||
544 | stc |
||
545 | ret |
||
546 | |||
547 | |||
548 | get_cluster_of_a_path: |
||
549 | ;--------------------------------------------------------- |
||
550 | ; input : EBX = pointer to a path string |
||
551 | ; (example: the path "/files/data/document" become |
||
552 | ; "files......data.......document...0" |
||
553 | ; '.' = space char |
||
554 | ; '0' = char(0) (ASCII=0) !!! ) |
||
555 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
556 | ; if (CARRY=0) -> EAX=cluster |
||
557 | ;--------------------------------------------------------- |
||
558 | push ebx edx |
||
559 | |||
560 | mov eax,[ROOT_CLUSTER] |
||
561 | mov edx,ebx |
||
562 | |||
563 | search_end_of_path: |
||
564 | cmp byte [edx],0 |
||
565 | je found_end_of_path |
||
566 | |||
567 | inc edx ; '/' |
||
568 | mov ebx,edx |
||
569 | call analyze_directory |
||
570 | jc directory_not_found |
||
571 | |||
572 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
573 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
574 | and eax,[fatMASK] |
||
575 | add edx,11 ; 8+3 (name+extension) |
||
576 | jmp search_end_of_path |
||
577 | |||
578 | found_end_of_path: |
||
579 | pop edx ebx |
||
580 | clc ; no errors |
||
581 | ret |
||
582 | |||
583 | directory_not_found: |
||
584 | pop edx ebx |
||
585 | stc ; errors occour |
||
586 | ret |
||
587 | |||
588 | |||
589 | bcd2bin: |
||
590 | ;---------------------------------- |
||
591 | ; input : AL=BCD number (eg. 0x11) |
||
592 | ; output : AH=0 |
||
593 | ; AL=decimal number (eg. 11) |
||
594 | ;---------------------------------- |
||
595 | xor ah,ah |
||
596 | shl ax,4 |
||
597 | shr al,4 |
||
598 | aad |
||
599 | ret |
||
600 | |||
601 | |||
602 | get_date_for_file: |
||
603 | ;----------------------------------------------------- |
||
604 | ; Get date from CMOS and pack day,month,year in AX |
||
605 | ; DATE bits 0..4 : day of month 0..31 |
||
606 | ; 5..8 : month of year 1..12 |
||
607 | ; 9..15 : count of years from 1980 |
||
608 | ;----------------------------------------------------- |
||
609 | mov al,0x7 ;day |
||
610 | out 0x70,al |
||
611 | in al,0x71 |
||
612 | call bcd2bin |
||
613 | ror eax,5 |
||
614 | |||
615 | mov al,0x8 ;month |
||
616 | out 0x70,al |
||
617 | in al,0x71 |
||
618 | call bcd2bin |
||
619 | ror eax,4 |
||
620 | |||
621 | mov al,0x9 ;year |
||
622 | out 0x70,al |
||
623 | in al,0x71 |
||
624 | call bcd2bin |
||
625 | add ax,20 ;because CMOS return only the two last |
||
626 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
627 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
628 | ret |
||
629 | |||
630 | |||
631 | get_time_for_file: |
||
632 | ;----------------------------------------------------- |
||
633 | ; Get time from CMOS and pack hour,minute,second in AX |
||
634 | ; TIME bits 0..4 : second (the low bit is lost) |
||
635 | ; 5..10 : minute 0..59 |
||
636 | ; 11..15 : hour 0..23 |
||
637 | ;----------------------------------------------------- |
||
638 | mov al,0x0 ;second |
||
639 | out 0x70,al |
||
640 | in al,0x71 |
||
641 | call bcd2bin |
||
642 | ror eax,6 |
||
643 | |||
644 | mov al,0x2 ;minute |
||
645 | out 0x70,al |
||
646 | in al,0x71 |
||
647 | call bcd2bin |
||
648 | ror eax,6 |
||
649 | |||
650 | mov al,0x4 ;hour |
||
651 | out 0x70,al |
||
652 | in al,0x71 |
||
653 | call bcd2bin |
||
654 | rol eax,11 |
||
655 | ret |
||
656 | |||
657 | |||
658 | set_current_time_for_entry: |
||
659 | ;----------------------------------------------------- |
||
660 | ; Set current time/date for file entry |
||
661 | ; input : ebx = file entry pointer |
||
662 | ;----------------------------------------------------- |
||
663 | push eax |
||
664 | call get_time_for_file ; update files date/time |
||
665 | mov [ebx+22],ax |
||
666 | call get_date_for_file |
||
667 | mov [ebx+24],ax |
||
668 | pop eax |
||
669 | ret |
||
670 | |||
671 | |||
672 | |||
673 | add_disk_free_space: |
||
674 | ;----------------------------------------------------- |
||
675 | ; input : ecx = cluster count |
||
676 | ; Note : negative = remove clusters from free space |
||
677 | ; positive = add clusters to free space |
||
678 | ;----------------------------------------------------- |
||
679 | test ecx,ecx ; no change |
||
680 | je add_dfs_no |
||
256 | diamond | 681 | cmp [fs_type],32 ; free disk space only used by fat32 |
1 | ha | 682 | jne add_dfs_no |
683 | |||
684 | push eax ebx |
||
685 | mov eax,[ADR_FSINFO] |
||
133 | diamond | 686 | mov ebx,fsinfo_buffer |
1 | ha | 687 | call hd_read |
74 | mario79 | 688 | cmp [hd_error],0 |
689 | jne add_not_fs |
||
690 | |||
1 | ha | 691 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
692 | jne add_not_fs |
||
693 | |||
694 | add [ebx+0x1e8],ecx |
||
654 | diamond | 695 | push [fatStartScan] |
696 | pop dword [ebx+0x1ec] |
||
1 | ha | 697 | call hd_write |
133 | diamond | 698 | ; cmp [hd_error],0 |
699 | ; jne add_not_fs |
||
1 | ha | 700 | |
701 | add_not_fs: |
||
702 | pop ebx eax |
||
703 | |||
704 | add_dfs_no: |
||
705 | ret |
||
706 | |||
707 | |||
708 | file_read: |
||
709 | ;-------------------------------------------------------------------------- |
||
710 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
711 | ; |
||
712 | ; EAX EDI system call to write / |
||
713 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
714 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
715 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
716 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
717 | ; EDI ESI vt first 512 block to read |
||
718 | ; EDI if 0 - read root |
||
719 | ; |
||
720 | ; output : eax = 0 - ok |
||
721 | ; 3 - unknown FS |
||
722 | ; 5 - file not found |
||
723 | ; 6 - end of file |
||
724 | ; 9 - fat table corrupted |
||
74 | mario79 | 725 | ; 10 - access denied |
1 | ha | 726 | ; ebx = size of file/directory |
727 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 728 | cmp [fs_type], 16 |
729 | jz fat_ok_for_reading |
||
730 | cmp [fs_type], 32 |
||
731 | jz fat_ok_for_reading |
||
1 | ha | 732 | xor ebx,ebx |
733 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 734 | mov [hd1_status], ebx |
1 | ha | 735 | ret |
736 | |||
737 | fat_ok_for_reading: |
||
738 | ; call reserve_hd1 |
||
739 | |||
740 | pushad |
||
741 | |||
742 | mov ebx,edx |
||
743 | call get_cluster_of_a_path |
||
744 | jc file_to_read_not_found |
||
745 | |||
746 | test edi,edi ; read rootdir |
||
747 | jne no_read_root |
||
748 | |||
749 | xor eax,eax |
||
750 | call get_dir_size ; return rootdir size |
||
74 | mario79 | 751 | cmp [hd_error],0 |
752 | jne file_access_denied |
||
753 | |||
1 | ha | 754 | mov [file_size],eax |
755 | mov eax,[ROOT_CLUSTER] |
||
756 | jmp file_read_start |
||
757 | |||
758 | no_read_root: |
||
759 | mov ebx,PUSHAD_EAX ; file name |
||
760 | call analyze_directory |
||
761 | jc file_to_read_not_found |
||
762 | |||
763 | mov eax,[ebx+28] ; file size |
||
764 | test byte [ebx+11],0x10 ; is it directory? |
||
765 | jz read_set_size ; no |
||
766 | |||
767 | mov eax,[ebx+20-2] ; FAT entry |
||
768 | mov ax,[ebx+26] |
||
769 | and eax,[fatMASK] |
||
770 | call get_dir_size |
||
74 | mario79 | 771 | cmp [hd_error],0 |
772 | jne file_access_denied |
||
1 | ha | 773 | |
774 | read_set_size: |
||
775 | mov [file_size],eax |
||
776 | |||
777 | mov eax,[ebx+20-2] ; FAT entry |
||
778 | mov ax,[ebx+26] |
||
779 | and eax,[fatMASK] |
||
780 | |||
781 | file_read_start: |
||
782 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
783 | mov edx,PUSHAD_EBX ; file blocks to read |
||
784 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
785 | |||
786 | file_read_new_cluster: |
||
787 | call get_data_cluster |
||
788 | jc file_read_eof ; end of file or cluster out of range |
||
789 | |||
790 | test edx,edx ; is all read? |
||
791 | je file_read_OK ; yes |
||
792 | |||
793 | call get_FAT ; get next cluster |
||
74 | mario79 | 794 | cmp [hd_error],0 |
795 | jne file_access_denied |
||
796 | |||
1 | ha | 797 | cmp eax,[fatRESERVED] ; end of file |
798 | jnb file_read_eof |
||
799 | cmp eax,2 ; incorrect fat chain |
||
800 | jnb file_read_new_cluster |
||
801 | |||
802 | popad |
||
803 | mov [hd1_status],0 |
||
804 | mov ebx,[file_size] |
||
805 | mov eax,ERROR_FAT_TABLE |
||
806 | ret |
||
807 | |||
808 | file_read_eof: |
||
74 | mario79 | 809 | cmp [hd_error],0 |
810 | jne file_access_denied |
||
1 | ha | 811 | popad |
812 | mov [hd1_status],0 |
||
813 | mov ebx,[file_size] |
||
814 | mov eax,ERROR_END_OF_FILE |
||
815 | ret |
||
816 | |||
817 | file_read_OK: |
||
818 | popad |
||
819 | mov [hd1_status],0 |
||
820 | mov ebx,[file_size] |
||
821 | xor eax,eax |
||
822 | ret |
||
823 | |||
824 | file_to_read_not_found: |
||
74 | mario79 | 825 | cmp [hd_error],0 |
826 | jne file_access_denied |
||
1 | ha | 827 | popad |
828 | mov [hd1_status],0 |
||
829 | xor ebx,ebx |
||
830 | mov eax,ERROR_FILE_NOT_FOUND |
||
831 | ret |
||
832 | |||
74 | mario79 | 833 | file_access_denied: |
834 | popad |
||
835 | mov [hd1_status],0 |
||
836 | xor ebx,ebx |
||
837 | mov eax,ERROR_ACCESS_DENIED |
||
838 | ret |
||
1 | ha | 839 | |
840 | get_dir_size: |
||
841 | ;----------------------------------------------------- |
||
842 | ; input : eax = first cluster (0=rootdir) |
||
843 | ; output : eax = directory size in bytes |
||
844 | ;----------------------------------------------------- |
||
845 | push edx |
||
846 | xor edx,edx ; count of directory clusters |
||
847 | test eax,eax |
||
848 | jnz dir_size_next |
||
849 | |||
850 | mov eax,[ROOT_SECTORS] |
||
851 | shl eax,9 ; fat16 rootdir size in bytes |
||
256 | diamond | 852 | cmp [fs_type],16 |
1 | ha | 853 | je dir_size_ret |
854 | mov eax,[ROOT_CLUSTER] |
||
855 | |||
856 | dir_size_next: |
||
857 | cmp eax,2 ; incorrect fat chain |
||
858 | jb dir_size_end |
||
859 | cmp eax,[fatRESERVED] ; end of directory |
||
860 | ja dir_size_end |
||
861 | call get_FAT ; get next cluster |
||
74 | mario79 | 862 | cmp [hd_error],0 |
863 | jne dir_size_ret |
||
864 | |||
1 | ha | 865 | inc edx |
866 | jmp dir_size_next |
||
867 | |||
868 | dir_size_end: |
||
869 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
870 | imul eax,edx |
||
871 | |||
872 | dir_size_ret: |
||
873 | pop edx |
||
874 | ret |
||
875 | |||
876 | |||
877 | clear_cluster_chain: |
||
878 | ;----------------------------------------------------- |
||
879 | ; input : eax = first cluster |
||
880 | ;----------------------------------------------------- |
||
881 | push eax ecx edx |
||
882 | xor ecx,ecx ; cluster count |
||
883 | |||
884 | clean_new_chain: |
||
885 | cmp eax,[LAST_CLUSTER] ; end of file |
||
886 | ja delete_OK |
||
887 | cmp eax,2 ; unfinished fat chain or zero length file |
||
888 | jb delete_OK |
||
889 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
890 | jz delete_OK |
||
891 | |||
892 | xor edx,edx |
||
893 | call set_FAT ; clear fat entry |
||
74 | mario79 | 894 | cmp [hd_error],0 |
895 | jne access_denied_01 |
||
896 | |||
1 | ha | 897 | inc ecx ; update cluster count |
898 | mov eax,edx ; old cluster |
||
899 | jmp clean_new_chain |
||
900 | |||
901 | delete_OK: |
||
902 | call add_disk_free_space ; add clusters to free disk space |
||
74 | mario79 | 903 | access_denied_01: |
1 | ha | 904 | pop edx ecx eax |
905 | ret |
||
906 | |||
907 | |||
908 | get_hd_info: |
||
909 | ;----------------------------------------------------------- |
||
910 | ; output : eax = 0 - ok |
||
911 | ; 3 - unknown FS |
||
74 | mario79 | 912 | ; 10 - access denied |
1 | ha | 913 | ; edx = cluster size in bytes |
914 | ; ebx = total clusters on disk |
||
915 | ; ecx = free clusters on disk |
||
916 | ;----------------------------------------------------------- |
||
256 | diamond | 917 | cmp [fs_type], 16 |
918 | jz info_fat_ok |
||
919 | cmp [fs_type], 32 |
||
920 | jz info_fat_ok |
||
1 | ha | 921 | xor edx,edx |
922 | xor ebx,ebx |
||
923 | xor ecx,ecx |
||
924 | mov eax,ERROR_UNKNOWN_FS |
||
925 | ret |
||
926 | |||
927 | info_fat_ok: |
||
928 | ; call reserve_hd1 |
||
929 | |||
930 | xor ecx,ecx ; count of free clusters |
||
931 | mov eax,2 |
||
932 | mov ebx,[LAST_CLUSTER] |
||
933 | |||
934 | info_cluster: |
||
935 | push eax |
||
936 | call get_FAT ; get cluster info |
||
74 | mario79 | 937 | cmp [hd_error],0 |
938 | jne info_access_denied |
||
939 | |||
1 | ha | 940 | test eax,eax ; is it free? |
941 | jnz info_used ; no |
||
942 | inc ecx |
||
943 | |||
944 | info_used: |
||
945 | pop eax |
||
946 | inc eax |
||
947 | cmp eax,ebx ; is above last cluster? |
||
948 | jbe info_cluster ; no. test next cluster |
||
949 | |||
950 | dec ebx ; cluster count |
||
951 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
952 | mov [hd1_status],0 |
||
953 | xor eax,eax |
||
954 | ret |
||
955 | |||
74 | mario79 | 956 | info_access_denied: |
379 | serge | 957 | add esp,4 |
74 | mario79 | 958 | xor edx,edx |
959 | xor ebx,ebx |
||
960 | xor ecx,ecx |
||
961 | mov eax,ERROR_ACCESS_DENIED |
||
962 | ret |
||
1 | ha | 963 | |
964 | update_disk: |
||
965 | ;----------------------------------------------------------- |
||
966 | ; write changed fat and cache to disk |
||
967 | ;----------------------------------------------------------- |
||
968 | cmp [fat_change],0 ; is fat changed? |
||
969 | je upd_no_change |
||
970 | |||
971 | call write_fat_sector |
||
74 | mario79 | 972 | cmp [hd_error],0 |
973 | jne update_disk_acces_denied |
||
1 | ha | 974 | |
975 | upd_no_change: |
||
976 | |||
977 | call write_cache |
||
74 | mario79 | 978 | update_disk_acces_denied: |
1 | ha | 979 | ret |
980 | |||
981 | |||
71 | diamond | 982 | ; \begin{diamond} |
983 | hd_find_lfn: |
||
521 | diamond | 984 | ; in: esi+ebp -> name |
71 | diamond | 985 | ; out: CF=1 - file not found |
86 | diamond | 986 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 987 | ; destroys eax |
988 | push esi edi |
||
989 | push 0 |
||
990 | push 0 |
||
991 | push fat16_root_first |
||
992 | push fat16_root_next |
||
993 | mov eax, [ROOT_CLUSTER] |
||
256 | diamond | 994 | cmp [fs_type], 32 |
83 | diamond | 995 | jz .fat32 |
996 | .loop: |
||
997 | call fat_find_lfn |
||
998 | jc .notfound |
||
999 | cmp byte [esi], 0 |
||
1000 | jz .found |
||
521 | diamond | 1001 | .continue: |
83 | diamond | 1002 | test byte [edi+11], 10h |
1003 | jz .notfound |
||
1004 | and dword [esp+12], 0 |
||
88 | diamond | 1005 | mov eax, [edi+20-2] |
1006 | mov ax, [edi+26] ; cluster |
||
83 | diamond | 1007 | .fat32: |
1008 | mov [esp+8], eax |
||
1009 | mov dword [esp+4], fat_notroot_first |
||
1010 | mov dword [esp], fat_notroot_next |
||
1011 | jmp .loop |
||
71 | diamond | 1012 | .notfound: |
83 | diamond | 1013 | add esp, 16 |
1014 | pop edi esi |
||
1015 | stc |
||
1016 | ret |
||
71 | diamond | 1017 | .found: |
521 | diamond | 1018 | test ebp, ebp |
1019 | jz @f |
||
1020 | mov esi, ebp |
||
1021 | xor ebp, ebp |
||
1022 | jmp .continue |
||
1023 | @@: |
||
86 | diamond | 1024 | lea eax, [esp+8] |
1025 | cmp dword [eax], 0 |
||
1026 | jz .root |
||
1027 | call fat_get_sector |
||
1028 | jmp .cmn |
||
1029 | .root: |
||
1030 | mov eax, [eax+4] |
||
1031 | add eax, [ROOT_START] |
||
1032 | .cmn: |
||
83 | diamond | 1033 | add esp, 20 ; CF=0 |
1034 | pop esi |
||
1035 | ret |
||
74 | mario79 | 1036 | |
71 | diamond | 1037 | ;---------------------------------------------------------------- |
1038 | ; |
||
1039 | ; fs_HdRead - LFN variant for reading hard disk |
||
1040 | ; |
||
1041 | ; esi points to filename |
||
1042 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1043 | ; may be ebx=0 - start from first byte |
||
1044 | ; ecx number of bytes to read, 0+ |
||
1045 | ; edx mem location to return data |
||
1046 | ; |
||
77 | diamond | 1047 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 1048 | ; eax = 0 ok read or other = errormsg |
1049 | ; |
||
1050 | ;-------------------------------------------------------------- |
||
1051 | fs_HdRead: |
||
256 | diamond | 1052 | cmp [fs_type], 16 |
1053 | jz @f |
||
1054 | cmp [fs_type], 32 |
||
1055 | jz @f |
||
1056 | cmp [fs_type], 1 |
||
1057 | jz ntfs_HdRead |
||
1058 | or ebx, -1 |
||
1059 | mov eax, ERROR_UNKNOWN_FS |
||
1060 | ret |
||
71 | diamond | 1061 | @@: |
74 | mario79 | 1062 | push edi |
1063 | cmp byte [esi], 0 |
||
1064 | jnz @f |
||
71 | diamond | 1065 | .noaccess: |
74 | mario79 | 1066 | pop edi |
1067 | .noaccess_2: |
||
1068 | or ebx, -1 |
||
1069 | mov eax, ERROR_ACCESS_DENIED |
||
1070 | ret |
||
379 | serge | 1071 | |
71 | diamond | 1072 | @@: |
74 | mario79 | 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 |
||
1081 | |||
71 | diamond | 1082 | .found: |
74 | mario79 | 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: |
74 | mario79 | 1091 | mov eax, 6 |
1092 | pop edi |
||
1093 | ret |
||
71 | diamond | 1094 | @@: |
74 | mario79 | 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 | @@: |
||
74 | mario79 | 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: |
||
74 | mario79 | 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: |
74 | mario79 | 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 |
74 | mario79 | 1132 | push ebx |
1133 | mov ebx, edx |
||
1134 | call hd_read |
||
2971 | Serge | 1135 | pop ebx |
74 | mario79 | 1136 | cmp [hd_error],0 |
379 | serge | 1137 | jne .noaccess_1 |
74 | mario79 | 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 |
||
74 | mario79 | 1143 | push eax ebx |
1144 | mov ebx, buffer |
||
1145 | call hd_read |
||
1146 | |||
1147 | mov eax, ebx |
||
1148 | pop ebx |
||
2971 | Serge | 1149 | cmp [hd_error],0 |
1150 | jne .noaccess_3 |
||
74 | mario79 | 1151 | add eax, ebx |
1152 | push ecx |
||
1153 | add ecx, ebx |
||
1154 | cmp ecx, 512 |
||
1155 | jbe @f |
||
1156 | mov ecx, 512 |
||
71 | diamond | 1157 | @@: |
74 | mario79 | 1158 | sub ecx, ebx |
1159 | mov ebx, edx |
||
1160 | call memmove |
||
1161 | add edx, ecx |
||
1162 | sub [esp], ecx |
||
1163 | pop ecx |
||
1164 | pop eax |
||
1165 | xor ebx, ebx |
||
71 | diamond | 1166 | .skip: |
74 | mario79 | 1167 | inc eax |
1168 | dec edi |
||
1169 | jnz .new_sector |
||
1170 | mov eax, [cluster_tmp] |
||
1171 | call get_FAT |
||
1172 | cmp [hd_error],0 |
||
2971 | Serge | 1173 | jne .noaccess_1 |
74 | mario79 | 1174 | |
1175 | jmp .new_cluster |
||
2971 | Serge | 1176 | .noaccess_3: |
1177 | pop eax |
||
1178 | .noaccess_1: |
||
1179 | pop eax |
||
1180 | push 11 |
||
71 | diamond | 1181 | .done: |
77 | diamond | 1182 | mov ebx, edx |
1183 | pop eax edx ecx edi |
||
1184 | sub ebx, edx |
||
1185 | ret |
||
71 | diamond | 1186 | .eof: |
77 | diamond | 1187 | mov ebx, edx |
1188 | pop eax edx ecx |
||
1189 | sub ebx, edx |
||
1190 | jmp .reteof |
||
75 | diamond | 1191 | |
1192 | ;---------------------------------------------------------------- |
||
1193 | ; |
||
1194 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
1195 | ; |
||
1196 | ; esi points to filename |
||
78 | diamond | 1197 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
1198 | ; & flags (bitfields) |
||
1199 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 1200 | ; ecx number of blocks to read, 0+ |
1201 | ; edx mem location to return data |
||
1202 | ; |
||
77 | diamond | 1203 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 1204 | ; eax = 0 ok read or other = errormsg |
1205 | ; |
||
1206 | ;-------------------------------------------------------------- |
||
1207 | fs_HdReadFolder: |
||
256 | diamond | 1208 | cmp [fs_type], 1 |
1209 | jz ntfs_HdReadFolder |
||
1210 | cmp [fs_type], 16 |
||
1211 | jz @f |
||
1212 | cmp [fs_type], 32 |
||
1213 | jz @f |
||
1214 | push ERROR_UNSUPPORTED_FS |
||
1215 | pop eax |
||
1216 | or ebx, -1 |
||
1217 | ret |
||
1218 | @@: |
||
75 | diamond | 1219 | mov eax, [ROOT_CLUSTER] |
1220 | push edi |
||
1221 | cmp byte [esi], 0 |
||
1222 | jz .doit |
||
1223 | call hd_find_lfn |
||
1224 | jnc .found |
||
1225 | pop edi |
||
1226 | or ebx, -1 |
||
1227 | mov eax, ERROR_FILE_NOT_FOUND |
||
1228 | ret |
||
1229 | .found: |
||
1230 | test byte [edi+11], 0x10 ; do not allow read files |
||
1231 | jnz .found_dir |
||
1232 | pop edi |
||
1233 | or ebx, -1 |
||
1234 | mov eax, ERROR_ACCESS_DENIED |
||
1235 | ret |
||
1236 | .found_dir: |
||
1237 | mov eax, [edi+20-2] |
||
1238 | mov ax, [edi+26] ; eax=cluster |
||
1239 | .doit: |
||
1240 | push esi ecx |
||
1241 | push ebp |
||
1242 | sub esp, 262*2 ; reserve space for LFN |
||
1243 | mov ebp, esp |
||
78 | diamond | 1244 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1245 | mov ebx, [ebx] |
||
75 | diamond | 1246 | ; init header |
1247 | push eax ecx |
||
1248 | mov edi, edx |
||
1249 | mov ecx, 32/4 |
||
1250 | xor eax, eax |
||
1251 | rep stosd |
||
1252 | pop ecx eax |
||
1253 | mov byte [edx], 1 ; version |
||
1254 | mov esi, edi ; esi points to BDFE |
||
1255 | .new_cluster: |
||
1256 | mov [cluster_tmp], eax |
||
1257 | test eax, eax |
||
1258 | jnz @f |
||
256 | diamond | 1259 | cmp [fs_type], 32 |
75 | diamond | 1260 | jz .notfound |
1261 | mov eax, [ROOT_START] |
||
1262 | push [ROOT_SECTORS] |
||
1263 | push ebx |
||
1264 | jmp .new_sector |
||
1265 | @@: |
||
1266 | dec eax |
||
1267 | dec eax |
||
1268 | imul eax, [SECTORS_PER_CLUSTER] |
||
1269 | push [SECTORS_PER_CLUSTER] |
||
1270 | add eax, [DATA_START] |
||
1271 | push ebx |
||
1272 | .new_sector: |
||
1273 | mov ebx, buffer |
||
1274 | mov edi, ebx |
||
1275 | call hd_read |
||
1276 | cmp [hd_error], 0 |
||
1277 | jnz .notfound2 |
||
1278 | add ebx, 512 |
||
1279 | push eax |
||
1280 | .l1: |
||
1281 | call fat_get_name |
||
1282 | jc .l2 |
||
1283 | cmp byte [edi+11], 0xF |
||
1284 | jnz .do_bdfe |
||
1285 | add edi, 0x20 |
||
1286 | cmp edi, ebx |
||
1287 | jb .do_bdfe |
||
1288 | pop eax |
||
1289 | inc eax |
||
1290 | dec dword [esp+4] |
||
1291 | jnz @f |
||
1292 | mov eax, [cluster_tmp] |
||
1293 | test eax, eax |
||
1294 | jz .done |
||
1295 | call get_FAT |
||
1296 | cmp [hd_error], 0 |
||
1297 | jnz .notfound2 |
||
1298 | cmp eax, 2 |
||
1299 | jb .done |
||
1300 | cmp eax, [fatRESERVED] |
||
1301 | jae .done |
||
1302 | push eax |
||
1303 | mov eax, [SECTORS_PER_CLUSTER] |
||
1304 | mov [esp+8], eax |
||
1305 | pop eax |
||
1306 | mov [cluster_tmp], eax |
||
1307 | dec eax |
||
1308 | dec eax |
||
1309 | imul eax, [SECTORS_PER_CLUSTER] |
||
1310 | add eax, [DATA_START] |
||
1311 | @@: |
||
1312 | mov ebx, buffer |
||
1313 | mov edi, ebx |
||
1314 | call hd_read |
||
1315 | cmp [hd_error], 0 |
||
1316 | jnz .notfound2 |
||
1317 | add ebx, 512 |
||
1318 | push eax |
||
1319 | .do_bdfe: |
||
1320 | inc dword [edx+8] ; new file found |
||
1321 | dec dword [esp+4] |
||
1322 | jns .l2 |
||
1323 | dec ecx |
||
1324 | js .l2 |
||
1325 | inc dword [edx+4] ; new file block copied |
||
1326 | call fat_entry_to_bdfe |
||
1327 | .l2: |
||
1328 | add edi, 0x20 |
||
1329 | cmp edi, ebx |
||
1330 | jb .l1 |
||
1331 | pop eax |
||
1332 | inc eax |
||
1333 | dec dword [esp+4] |
||
1334 | jnz .new_sector |
||
1335 | mov eax, [cluster_tmp] |
||
1336 | test eax, eax |
||
1337 | jz .done |
||
1338 | call get_FAT |
||
1339 | cmp [hd_error], 0 |
||
1340 | jnz .notfound2 |
||
1341 | cmp eax, 2 |
||
1342 | jb .done |
||
1343 | cmp eax, [fatRESERVED] |
||
1344 | jae .done |
||
1345 | push eax |
||
1346 | mov eax, [SECTORS_PER_CLUSTER] |
||
1347 | mov [esp+8], eax |
||
1348 | pop eax |
||
1349 | pop ebx |
||
1350 | add esp, 4 |
||
1351 | jmp .new_cluster |
||
1352 | .notfound2: |
||
1353 | add esp, 8 |
||
1354 | .notfound: |
||
1355 | add esp, 262*2+4 |
||
1356 | pop ebp ecx esi edi |
||
1357 | mov eax, ERROR_FILE_NOT_FOUND |
||
1358 | or ebx, -1 |
||
1359 | ret |
||
1360 | .done: |
||
1361 | add esp, 262*2+4+8 |
||
1362 | pop ebp |
||
77 | diamond | 1363 | mov ebx, [edx+4] |
75 | diamond | 1364 | xor eax, eax |
1365 | dec ecx |
||
1366 | js @f |
||
1367 | mov al, ERROR_END_OF_FILE |
||
1368 | @@: |
||
1369 | pop ecx esi edi |
||
1370 | ret |
||
1371 | |||
83 | diamond | 1372 | fat16_root_next: |
1373 | cmp edi, buffer+0x200-0x20 |
||
1374 | jae fat16_root_next_sector |
||
1375 | add edi, 0x20 |
||
1376 | ret ; CF=0 |
||
1377 | fat16_root_next_sector: |
||
1378 | ; read next sector |
||
171 | diamond | 1379 | push [longname_sec2] |
1380 | pop [longname_sec1] |
||
83 | diamond | 1381 | push ecx |
1382 | mov ecx, [eax+4] |
||
171 | diamond | 1383 | push ecx |
1384 | add ecx, [ROOT_START] |
||
1385 | mov [longname_sec2], ecx |
||
1386 | pop ecx |
||
83 | diamond | 1387 | inc ecx |
1388 | mov [eax+4], ecx |
||
1389 | cmp ecx, [ROOT_SECTORS] |
||
1390 | pop ecx |
||
1391 | jae fat16_root_first.readerr |
||
1392 | fat16_root_first: |
||
1393 | mov eax, [eax+4] |
||
1394 | add eax, [ROOT_START] |
||
1395 | push ebx |
||
1396 | mov edi, buffer |
||
1397 | mov ebx, edi |
||
1398 | call hd_read |
||
1399 | pop ebx |
||
1400 | cmp [hd_error], 0 |
||
1401 | jnz .readerr |
||
1402 | ret ; CF=0 |
||
1403 | .readerr: |
||
1404 | stc |
||
1405 | ret |
||
1406 | fat16_root_begin_write: |
||
1407 | push edi eax |
||
1408 | call fat16_root_first |
||
1409 | pop eax edi |
||
1410 | ret |
||
1411 | fat16_root_end_write: |
||
1412 | pusha |
||
1413 | mov eax, [eax+4] |
||
1414 | add eax, [ROOT_START] |
||
1415 | mov ebx, buffer |
||
1416 | call hd_write |
||
1417 | popa |
||
1418 | ret |
||
1419 | fat16_root_next_write: |
||
1420 | cmp edi, buffer+0x200 |
||
1421 | jae @f |
||
1422 | ret |
||
1423 | @@: |
||
1424 | call fat16_root_end_write |
||
1425 | jmp fat16_root_next_sector |
||
1426 | fat16_root_extend_dir: |
||
1427 | stc |
||
1428 | ret |
||
1429 | |||
1430 | fat_notroot_next: |
||
1431 | cmp edi, buffer+0x200-0x20 |
||
1432 | jae fat_notroot_next_sector |
||
1433 | add edi, 0x20 |
||
1434 | ret ; CF=0 |
||
1435 | fat_notroot_next_sector: |
||
171 | diamond | 1436 | push [longname_sec2] |
1437 | pop [longname_sec1] |
||
1438 | push eax |
||
1439 | call fat_get_sector |
||
1440 | mov [longname_sec2], eax |
||
1441 | pop eax |
||
83 | diamond | 1442 | push ecx |
1443 | mov ecx, [eax+4] |
||
1444 | inc ecx |
||
1445 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
1446 | jae fat_notroot_next_cluster |
||
1447 | mov [eax+4], ecx |
||
1448 | jmp @f |
||
1449 | fat_notroot_next_cluster: |
||
1450 | push eax |
||
1451 | mov eax, [eax] |
||
1452 | call get_FAT |
||
1453 | mov ecx, eax |
||
1454 | pop eax |
||
1455 | cmp [hd_error], 0 |
||
1456 | jnz fat_notroot_next_err |
||
1457 | cmp ecx, [fatRESERVED] |
||
1458 | jae fat_notroot_next_err |
||
1459 | mov [eax], ecx |
||
1460 | and dword [eax+4], 0 |
||
1461 | @@: |
||
1462 | pop ecx |
||
1463 | fat_notroot_first: |
||
1464 | call fat_get_sector |
||
1465 | push ebx |
||
1466 | mov edi, buffer |
||
1467 | mov ebx, edi |
||
1468 | call hd_read |
||
1469 | pop ebx |
||
1470 | cmp [hd_error], 0 |
||
1471 | jnz @f |
||
1472 | ret ; CF=0 |
||
1473 | fat_notroot_next_err: |
||
1474 | pop ecx |
||
1475 | @@: |
||
1476 | stc |
||
1477 | ret |
||
1478 | fat_notroot_begin_write: |
||
1479 | push eax edi |
||
1480 | call fat_notroot_first |
||
1481 | pop edi eax |
||
1482 | ret |
||
1483 | fat_notroot_end_write: |
||
1484 | call fat_get_sector |
||
1485 | push ebx |
||
1486 | mov ebx, buffer |
||
1487 | call hd_write |
||
1488 | pop ebx |
||
1489 | ret |
||
1490 | fat_notroot_next_write: |
||
1491 | cmp edi, buffer+0x200 |
||
1492 | jae @f |
||
1493 | ret |
||
1494 | @@: |
||
1495 | push eax |
||
1496 | call fat_notroot_end_write |
||
1497 | pop eax |
||
1498 | jmp fat_notroot_next_sector |
||
1499 | fat_notroot_extend_dir: |
||
1500 | push eax |
||
1501 | call get_free_FAT |
||
1502 | jnc .found |
||
1503 | pop eax |
||
1504 | ret ; CF=1 |
||
1505 | .found: |
||
1506 | push edx |
||
1507 | mov edx, [fatEND] |
||
1508 | call set_FAT |
||
1509 | mov edx, eax |
||
1510 | mov eax, [esp+4] |
||
1511 | mov eax, [eax] |
||
1512 | push edx |
||
1513 | call set_FAT |
||
1514 | pop edx |
||
1515 | cmp [hd_error], 0 |
||
1516 | jz @f |
||
1517 | pop edx |
||
1518 | pop eax |
||
1519 | stc |
||
1520 | ret |
||
1521 | @@: |
||
1522 | push ecx |
||
1523 | or ecx, -1 |
||
1524 | call add_disk_free_space |
||
1525 | ; zero new cluster |
||
1526 | mov ecx, 512/4 |
||
1527 | mov edi, buffer |
||
1528 | push edi |
||
1529 | xor eax, eax |
||
1530 | rep stosd |
||
1531 | pop edi |
||
1532 | pop ecx |
||
1533 | mov eax, [esp+4] |
||
1534 | mov [eax], edx |
||
1535 | and dword [eax+4], 0 |
||
1536 | pop edx |
||
1537 | mov eax, [eax] |
||
1538 | dec eax |
||
1539 | dec eax |
||
1540 | push ebx ecx |
||
1541 | mov ecx, [SECTORS_PER_CLUSTER] |
||
1542 | imul eax, ecx |
||
1543 | add eax, [DATA_START] |
||
1544 | mov ebx, edi |
||
1545 | @@: |
||
1546 | call hd_write |
||
1547 | inc eax |
||
1548 | loop @b |
||
1549 | pop ecx ebx eax |
||
1550 | clc |
||
1551 | ret |
||
1552 | |||
1553 | fat_get_sector: |
||
1554 | push ecx |
||
1555 | mov ecx, [eax] |
||
1556 | dec ecx |
||
1557 | dec ecx |
||
1558 | imul ecx, [SECTORS_PER_CLUSTER] |
||
1559 | add ecx, [DATA_START] |
||
1560 | add ecx, [eax+4] |
||
1561 | mov eax, ecx |
||
1562 | pop ecx |
||
1563 | ret |
||
1564 | |||
1565 | ;---------------------------------------------------------------- |
||
1566 | ; |
||
1567 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
1568 | ; |
||
1569 | ; esi points to filename |
||
1570 | ; ebx ignored (reserved) |
||
1571 | ; ecx number of bytes to write, 0+ |
||
1572 | ; edx mem location to data |
||
1573 | ; |
||
1574 | ; ret ebx = number of written bytes |
||
1575 | ; eax = 0 ok read or other = errormsg |
||
1576 | ; |
||
1577 | ;-------------------------------------------------------------- |
||
1578 | fshrad: |
||
1579 | mov eax, ERROR_ACCESS_DENIED |
||
1580 | xor ebx, ebx |
||
1581 | ret |
||
1582 | fshrfs: |
||
1583 | mov eax, ERROR_UNKNOWN_FS |
||
1584 | xor ebx, ebx |
||
1585 | ret |
||
1586 | |||
321 | diamond | 1587 | fs_HdCreateFolder: |
1588 | mov al, 1 |
||
1589 | jmp fs_HdRewrite.common |
||
1590 | |||
83 | diamond | 1591 | fs_HdRewrite: |
321 | diamond | 1592 | xor eax, eax |
1593 | .common: |
||
256 | diamond | 1594 | cmp [fs_type], 1 |
1595 | jz ntfs_HdRewrite |
||
1596 | cmp [fs_type], 16 |
||
1597 | jz @f |
||
1598 | cmp [fs_type], 32 |
||
1599 | jnz fshrfs |
||
1600 | @@: |
||
83 | diamond | 1601 | cmp byte [esi], 0 |
1602 | jz fshrad |
||
1603 | pushad |
||
521 | diamond | 1604 | xor edi, edi |
83 | diamond | 1605 | push esi |
521 | diamond | 1606 | test ebp, ebp |
1607 | jz @f |
||
1608 | mov esi, ebp |
||
83 | diamond | 1609 | @@: |
1610 | lodsb |
||
1611 | test al, al |
||
1612 | jz @f |
||
1613 | cmp al, '/' |
||
1614 | jnz @b |
||
521 | diamond | 1615 | lea edi, [esi-1] |
83 | diamond | 1616 | jmp @b |
1617 | @@: |
||
1618 | pop esi |
||
521 | diamond | 1619 | test edi, edi |
1620 | jnz .noroot |
||
83 | diamond | 1621 | test ebp, ebp |
521 | diamond | 1622 | jnz .hasebp |
83 | diamond | 1623 | mov ebp, [ROOT_CLUSTER] |
256 | diamond | 1624 | cmp [fs_type], 32 |
83 | diamond | 1625 | jz .pushnotroot |
1626 | push fat16_root_extend_dir |
||
1627 | push fat16_root_end_write |
||
1628 | push fat16_root_next_write |
||
1629 | push fat16_root_begin_write |
||
1630 | xor ebp, ebp |
||
1631 | push ebp |
||
1632 | push ebp |
||
1633 | push fat16_root_first |
||
1634 | push fat16_root_next |
||
1635 | jmp .common1 |
||
521 | diamond | 1636 | .hasebp: |
1637 | mov eax, ERROR_ACCESS_DENIED |
||
1638 | cmp byte [ebp], 0 |
||
1639 | jz .ret1 |
||
1640 | push ebp |
||
1641 | xor ebp, ebp |
||
1642 | call hd_find_lfn |
||
1643 | pop esi |
||
1644 | jc .notfound0 |
||
1645 | jmp .common0 |
||
83 | diamond | 1646 | .noroot: |
335 | diamond | 1647 | mov eax, ERROR_ACCESS_DENIED |
521 | diamond | 1648 | cmp byte [edi+1], 0 |
335 | diamond | 1649 | jz .ret1 |
83 | diamond | 1650 | ; check existence |
521 | diamond | 1651 | mov byte [edi], 0 |
1652 | push edi |
||
83 | diamond | 1653 | call hd_find_lfn |
521 | diamond | 1654 | pop esi |
1655 | mov byte [esi], '/' |
||
83 | diamond | 1656 | jnc @f |
521 | diamond | 1657 | .notfound0: |
83 | diamond | 1658 | mov eax, ERROR_FILE_NOT_FOUND |
1659 | .ret1: |
||
1660 | mov [esp+28], eax |
||
1661 | popad |
||
1662 | xor ebx, ebx |
||
1663 | ret |
||
1664 | @@: |
||
521 | diamond | 1665 | inc esi |
1666 | .common0: |
||
83 | diamond | 1667 | test byte [edi+11], 0x10 ; must be directory |
1668 | mov eax, ERROR_ACCESS_DENIED |
||
1669 | jz .ret1 |
||
1670 | mov ebp, [edi+20-2] |
||
1671 | mov bp, [edi+26] ; ebp=cluster |
||
1672 | mov eax, ERROR_FAT_TABLE |
||
1673 | cmp ebp, 2 |
||
1674 | jb .ret1 |
||
1675 | .pushnotroot: |
||
1676 | push fat_notroot_extend_dir |
||
1677 | push fat_notroot_end_write |
||
1678 | push fat_notroot_next_write |
||
1679 | push fat_notroot_begin_write |
||
1680 | push 0 |
||
1681 | push ebp |
||
1682 | push fat_notroot_first |
||
1683 | push fat_notroot_next |
||
1684 | .common1: |
||
1685 | call fat_find_lfn |
||
1686 | jc .notfound |
||
321 | diamond | 1687 | ; found |
91 | diamond | 1688 | test byte [edi+11], 10h |
321 | diamond | 1689 | jz .exists_file |
1690 | ; found directory; if we are creating directory, return OK, |
||
1691 | ; if we are creating file, say "access denied" |
||
1692 | add esp, 32 |
||
1693 | popad |
||
1694 | test al, al |
||
1695 | mov eax, ERROR_ACCESS_DENIED |
||
91 | diamond | 1696 | jz @f |
321 | diamond | 1697 | mov al, 0 |
1698 | @@: |
||
1699 | xor ebx, ebx |
||
1700 | ret |
||
1701 | .exists_file: |
||
1702 | ; found file; if we are creating directory, return "access denied", |
||
1703 | ; if we are creating file, delete existing file and continue |
||
1704 | cmp byte [esp+32+28], 0 |
||
1705 | jz @f |
||
91 | diamond | 1706 | add esp, 32 |
1707 | popad |
||
1708 | mov eax, ERROR_ACCESS_DENIED |
||
1709 | xor ebx, ebx |
||
1710 | ret |
||
1711 | @@: |
||
1712 | ; delete FAT chain |
||
83 | diamond | 1713 | push edi |
1714 | xor eax, eax |
||
1715 | mov dword [edi+28], eax ; zero size |
||
1716 | xor ecx, ecx |
||
1717 | mov eax, [edi+20-2] |
||
1718 | mov ax, [edi+26] |
||
1719 | mov word [edi+20], cx |
||
1720 | mov word [edi+26], cx |
||
1721 | test eax, eax |
||
1722 | jz .done1 |
||
1723 | @@: |
||
1724 | cmp eax, [fatRESERVED] |
||
1725 | jae .done1 |
||
1726 | push edx |
||
1727 | xor edx, edx |
||
1728 | call set_FAT |
||
1729 | mov eax, edx |
||
1730 | pop edx |
||
1731 | inc ecx |
||
1732 | jmp @b |
||
1733 | .done1: |
||
1734 | pop edi |
||
1735 | call get_time_for_file |
||
1736 | mov [edi+22], ax |
||
1737 | call get_date_for_file |
||
1738 | mov [edi+24], ax |
||
1739 | mov [edi+18], ax |
||
1740 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1741 | jmp .doit |
||
1742 | .notfound: |
||
1743 | ; file is not found; generate short name |
||
1744 | call fat_name_is_legal |
||
1745 | jc @f |
||
1746 | add esp, 32 |
||
1747 | popad |
||
1748 | mov eax, ERROR_FILE_NOT_FOUND |
||
1749 | xor ebx, ebx |
||
1750 | ret |
||
1751 | @@: |
||
1752 | sub esp, 12 |
||
1753 | mov edi, esp |
||
1754 | call fat_gen_short_name |
||
1755 | .test_short_name_loop: |
||
1756 | push esi edi ecx |
||
1757 | mov esi, edi |
||
1758 | lea eax, [esp+12+12+8] |
||
1759 | mov [eax], ebp |
||
1760 | and dword [eax+4], 0 |
||
1761 | call dword [eax-4] |
||
1762 | jc .found |
||
1763 | .test_short_name_entry: |
||
1764 | cmp byte [edi+11], 0xF |
||
1765 | jz .test_short_name_cont |
||
1766 | mov ecx, 11 |
||
1767 | push esi edi |
||
1768 | repz cmpsb |
||
1769 | pop edi esi |
||
1770 | jz .short_name_found |
||
1771 | .test_short_name_cont: |
||
1772 | lea eax, [esp+12+12+8] |
||
1773 | call dword [eax-8] |
||
1774 | jnc .test_short_name_entry |
||
1775 | jmp .found |
||
1776 | .short_name_found: |
||
1777 | pop ecx edi esi |
||
1778 | call fat_next_short_name |
||
1779 | jnc .test_short_name_loop |
||
1780 | .disk_full: |
||
1781 | add esp, 12+32 |
||
1782 | popa |
||
1783 | mov eax, ERROR_DISK_FULL |
||
1784 | xor ebx, ebx |
||
1785 | ret |
||
1786 | .found: |
||
1787 | pop ecx edi esi |
||
1788 | ; now find space in directory |
||
1789 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1790 | mov al, '~' |
||
1791 | push ecx edi |
||
1792 | mov ecx, 8 |
||
1793 | repnz scasb |
||
1794 | push 1 |
||
1795 | pop eax ; 1 entry |
||
1796 | jnz .notilde |
||
1797 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1798 | xor eax, eax |
||
1799 | @@: |
||
1800 | cmp byte [esi], 0 |
||
1801 | jz @f |
||
1802 | inc esi |
||
1803 | inc eax |
||
1804 | jmp @b |
||
1805 | @@: |
||
1806 | sub esi, eax |
||
1807 | add eax, 12+13 |
||
1808 | mov ecx, 13 |
||
1809 | push edx |
||
1810 | cdq |
||
1811 | div ecx |
||
1812 | pop edx |
||
1813 | .notilde: |
||
1814 | push -1 |
||
1815 | push -1 |
||
1816 | push -1 |
||
1817 | ; find |
||
1818 | xor ecx, ecx |
||
1819 | push eax |
||
1820 | lea eax, [esp+16+8+12+8] |
||
1821 | mov [eax], ebp |
||
1822 | and dword [eax+4], 0 |
||
1823 | call dword [eax-4] |
||
1824 | pop eax |
||
1825 | jnc .scan_dir |
||
1826 | .fsfrfe3: |
||
1827 | add esp, 12+8+12+32 |
||
1828 | popad |
||
1829 | mov eax, 11 |
||
1830 | xor ebx, ebx |
||
1831 | ret |
||
1832 | .scan_dir: |
||
1833 | cmp byte [edi], 0 |
||
1834 | jz .free |
||
1835 | cmp byte [edi], 0xE5 |
||
1836 | jz .free |
||
1837 | xor ecx, ecx |
||
1838 | .scan_cont: |
||
1839 | push eax |
||
1840 | lea eax, [esp+16+8+12+8] |
||
1841 | call dword [eax-8] |
||
1842 | pop eax |
||
1843 | jnc .scan_dir |
||
1844 | cmp [hd_error], 0 |
||
1845 | jnz .fsfrfe3 |
||
1846 | push eax |
||
1847 | lea eax, [esp+16+8+12+8] |
||
1848 | call dword [eax+20] ; extend directory |
||
1849 | pop eax |
||
1850 | jnc .scan_dir |
||
1851 | add esp, 12+8+12+32 |
||
1852 | popad |
||
1853 | mov eax, ERROR_DISK_FULL |
||
1854 | xor ebx, ebx |
||
1855 | ret |
||
1856 | .free: |
||
1857 | test ecx, ecx |
||
1858 | jnz @f |
||
1859 | mov [esp], edi |
||
1860 | mov ecx, [esp+12+8+12+8] |
||
1861 | mov [esp+4], ecx |
||
1862 | mov ecx, [esp+12+8+12+12] |
||
1863 | mov [esp+8], ecx |
||
1864 | xor ecx, ecx |
||
1865 | @@: |
||
1866 | inc ecx |
||
1867 | cmp ecx, eax |
||
1868 | jb .scan_cont |
||
1869 | ; found! |
||
1870 | ; calculate name checksum |
||
1871 | push esi ecx |
||
1872 | mov esi, [esp+8+12] |
||
1873 | mov ecx, 11 |
||
1874 | xor eax, eax |
||
1875 | @@: |
||
1876 | ror al, 1 |
||
1877 | add al, [esi] |
||
1878 | inc esi |
||
1879 | loop @b |
||
1880 | pop ecx esi |
||
1881 | pop edi |
||
1882 | pop dword [esp+8+12+12] |
||
1883 | pop dword [esp+8+12+12] |
||
1884 | ; edi points to first entry in free chunk |
||
1885 | dec ecx |
||
1886 | jz .nolfn |
||
1887 | push esi |
||
1888 | push eax |
||
1889 | lea eax, [esp+8+8+12+8] |
||
1890 | call dword [eax+8] ; begin write |
||
1891 | mov al, 40h |
||
1892 | .writelfn: |
||
1893 | or al, cl |
||
1894 | mov esi, [esp+4] |
||
1895 | push ecx |
||
1896 | dec ecx |
||
1897 | imul ecx, 13 |
||
1898 | add esi, ecx |
||
1899 | stosb |
||
1900 | mov cl, 5 |
||
1901 | call fs_RamdiskRewrite.read_symbols |
||
1902 | mov ax, 0xF |
||
1903 | stosw |
||
1904 | mov al, [esp+4] |
||
1905 | stosb |
||
1906 | mov cl, 6 |
||
1907 | call fs_RamdiskRewrite.read_symbols |
||
1908 | xor eax, eax |
||
1909 | stosw |
||
1910 | mov cl, 2 |
||
1911 | call fs_RamdiskRewrite.read_symbols |
||
1912 | pop ecx |
||
1913 | lea eax, [esp+8+8+12+8] |
||
1914 | call dword [eax+12] ; next write |
||
1915 | xor eax, eax |
||
1916 | loop .writelfn |
||
1917 | pop eax |
||
1918 | pop esi |
||
1919 | ; lea eax, [esp+8+12+8] |
||
1920 | ; call dword [eax+16] ; end write |
||
1921 | .nolfn: |
||
1922 | xchg esi, [esp] |
||
1923 | mov ecx, 11 |
||
1924 | rep movsb |
||
1925 | mov word [edi], 20h ; attributes |
||
1926 | sub edi, 11 |
||
1927 | pop esi ecx |
||
1928 | add esp, 12 |
||
1929 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1930 | call get_time_for_file |
||
1931 | mov [edi+14], ax ; creation time |
||
1932 | mov [edi+22], ax ; last write time |
||
1933 | call get_date_for_file |
||
1934 | mov [edi+16], ax ; creation date |
||
1935 | mov [edi+24], ax ; last write date |
||
1936 | mov [edi+18], ax ; last access date |
||
1937 | xor ecx, ecx |
||
1938 | mov word [edi+20], cx ; high word of cluster |
||
1939 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
1940 | mov dword [edi+28], ecx ; file size - to be filled |
||
321 | diamond | 1941 | cmp byte [esp+32+28], cl |
1942 | jz .doit |
||
1943 | ; create directory |
||
1944 | mov byte [edi+11], 10h ; attributes: folder |
||
1945 | mov edx, edi |
||
1946 | lea eax, [esp+8] |
||
1947 | call dword [eax+16] ; flush directory |
||
1948 | push ecx |
||
1949 | mov ecx, [SECTORS_PER_CLUSTER] |
||
1950 | shl ecx, 9 |
||
1951 | jmp .doit2 |
||
83 | diamond | 1952 | .doit: |
1953 | lea eax, [esp+8] |
||
1954 | call dword [eax+16] ; flush directory |
||
1955 | push ecx |
||
1956 | mov ecx, [esp+4+32+24] |
||
321 | diamond | 1957 | .doit2: |
83 | diamond | 1958 | push ecx |
1959 | push edi |
||
1960 | mov esi, edx |
||
1961 | test ecx, ecx |
||
1962 | jz .done |
||
1963 | call get_free_FAT |
||
1964 | jc .diskfull |
||
1965 | push eax |
||
1966 | mov [edi+26], ax |
||
1967 | shr eax, 16 |
||
1968 | mov [edi+20], ax |
||
1969 | lea eax, [esp+16+8] |
||
1970 | call dword [eax+16] ; flush directory |
||
1971 | pop eax |
||
1972 | push edx |
||
1973 | mov edx, [fatEND] |
||
1974 | call set_FAT |
||
1975 | pop edx |
||
1976 | .write_cluster: |
||
1977 | push eax |
||
1978 | dec eax |
||
1979 | dec eax |
||
1980 | mov ebp, [SECTORS_PER_CLUSTER] |
||
1981 | imul eax, ebp |
||
1982 | add eax, [DATA_START] |
||
1983 | ; write data |
||
1984 | .write_sector: |
||
321 | diamond | 1985 | cmp byte [esp+16+32+28], 0 |
1986 | jnz .writedir |
||
83 | diamond | 1987 | mov ecx, 512 |
1988 | cmp dword [esp+8], ecx |
||
1989 | jb .writeshort |
||
1990 | ; we can write directly from given buffer |
||
1991 | mov ebx, esi |
||
1992 | add esi, ecx |
||
1993 | jmp .writecommon |
||
1994 | .writeshort: |
||
1995 | mov ecx, [esp+8] |
||
1996 | push ecx |
||
1997 | mov edi, buffer |
||
1998 | mov ebx, edi |
||
1999 | rep movsb |
||
321 | diamond | 2000 | .writedircont: |
83 | diamond | 2001 | mov ecx, buffer+0x200 |
2002 | sub ecx, edi |
||
2003 | push eax |
||
2004 | xor eax, eax |
||
2005 | rep stosb |
||
2006 | pop eax |
||
2007 | pop ecx |
||
2008 | .writecommon: |
||
2009 | call hd_write |
||
2010 | cmp [hd_error], 0 |
||
2011 | jnz .writeerr |
||
2012 | inc eax |
||
2013 | sub dword [esp+8], ecx |
||
2014 | jz .writedone |
||
2015 | dec ebp |
||
2016 | jnz .write_sector |
||
2017 | ; allocate new cluster |
||
2018 | pop eax |
||
2019 | mov ecx, eax |
||
2020 | call get_free_FAT |
||
2021 | jc .diskfull |
||
2022 | push edx |
||
2023 | mov edx, [fatEND] |
||
2024 | call set_FAT |
||
2025 | xchg eax, ecx |
||
2026 | mov edx, ecx |
||
2027 | call set_FAT |
||
2028 | pop edx |
||
2029 | xchg eax, ecx |
||
2030 | jmp .write_cluster |
||
2031 | .diskfull: |
||
2032 | mov eax, ERROR_DISK_FULL |
||
2033 | jmp .ret |
||
2034 | .writeerr: |
||
2035 | pop eax |
||
2036 | sub esi, ecx |
||
2037 | mov eax, 11 |
||
2038 | jmp .ret |
||
2039 | .writedone: |
||
2040 | pop eax |
||
2041 | .done: |
||
2042 | xor eax, eax |
||
2043 | .ret: |
||
2044 | pop edi ecx |
||
2045 | mov ebx, esi |
||
2046 | sub ebx, edx |
||
2047 | pop ebp |
||
2048 | mov [esp+32+28], eax |
||
2049 | lea eax, [esp+8] |
||
2050 | call dword [eax+8] |
||
2051 | mov [edi+28], ebx |
||
2052 | call dword [eax+16] |
||
2053 | mov [esp+32+16], ebx |
||
2054 | lea eax, [ebx+511] |
||
2055 | shr eax, 9 |
||
2056 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2057 | lea eax, [eax+ecx-1] |
||
2058 | xor edx, edx |
||
2059 | div ecx |
||
2060 | mov ecx, ebp |
||
2061 | sub ecx, eax |
||
2062 | call add_disk_free_space |
||
2063 | add esp, 32 |
||
2064 | call update_disk |
||
2065 | popad |
||
2066 | ret |
||
321 | diamond | 2067 | .writedir: |
2068 | push 512 |
||
2069 | mov edi, buffer |
||
2070 | mov ebx, edi |
||
2071 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2072 | shl ecx, 9 |
||
2073 | cmp ecx, [esp+12] |
||
2074 | jnz .writedircont |
||
2075 | dec dword [esp+16] |
||
2076 | push esi |
||
2077 | mov ecx, 32/4 |
||
2078 | rep movsd |
||
2079 | pop esi |
||
2080 | mov dword [edi-32], '. ' |
||
2081 | mov dword [edi-32+4], ' ' |
||
2082 | mov dword [edi-32+8], ' ' |
||
2083 | mov byte [edi-32+11], 10h |
||
2084 | push esi |
||
2085 | mov ecx, 32/4 |
||
2086 | rep movsd |
||
2087 | pop esi |
||
2088 | mov dword [edi-32], '.. ' |
||
2089 | mov dword [edi-32+4], ' ' |
||
2090 | mov dword [edi-32+8], ' ' |
||
2091 | mov byte [edi-32+11], 10h |
||
2092 | mov ecx, [esp+20+8] |
||
2093 | cmp ecx, [ROOT_CLUSTER] |
||
2094 | jnz @f |
||
2095 | xor ecx, ecx |
||
2096 | @@: |
||
2097 | mov word [edi-32+26], cx |
||
2098 | shr ecx, 16 |
||
2099 | mov [edi-32+20], cx |
||
2100 | jmp .writedircont |
||
83 | diamond | 2101 | |
131 | diamond | 2102 | ;---------------------------------------------------------------- |
2103 | ; |
||
256 | diamond | 2104 | ; fs_HdWrite - LFN variant for writing to hard disk |
131 | diamond | 2105 | ; |
2106 | ; esi points to filename |
||
2107 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2108 | ; may be ebx=0 - start from first byte |
||
2109 | ; ecx number of bytes to write, 0+ |
||
2110 | ; edx mem location to data |
||
2111 | ; |
||
2112 | ; ret ebx = bytes written (maybe 0) |
||
2113 | ; eax = 0 ok write or other = errormsg |
||
2114 | ; |
||
2115 | ;-------------------------------------------------------------- |
||
2116 | fs_HdWrite.access_denied: |
||
2117 | push ERROR_ACCESS_DENIED |
||
2118 | fs_HdWrite.ret0: |
||
2119 | pop eax |
||
2120 | xor ebx, ebx |
||
2121 | ret |
||
2122 | |||
2123 | fs_HdWrite.ret11: |
||
2124 | push 11 |
||
2125 | jmp fs_HdWrite.ret0 |
||
2126 | |||
2127 | fs_HdWrite: |
||
256 | diamond | 2128 | cmp [fs_type], 1 |
2129 | jz ntfs_HdWrite |
||
2130 | cmp [fs_type], 16 |
||
2131 | jz @f |
||
2132 | cmp [fs_type], 32 |
||
2133 | jz @f |
||
131 | diamond | 2134 | push ERROR_UNKNOWN_FS |
2135 | jmp .ret0 |
||
2136 | @@: |
||
2137 | cmp byte [esi], 0 |
||
2138 | jz .access_denied |
||
2139 | pushad |
||
2140 | call hd_find_lfn |
||
2141 | pushfd |
||
2142 | cmp [hd_error], 0 |
||
2143 | jz @f |
||
2144 | popfd |
||
2145 | popad |
||
2146 | push 11 |
||
2147 | jmp .ret0 |
||
2148 | @@: |
||
2149 | popfd |
||
2150 | jnc .found |
||
2151 | popad |
||
2152 | push ERROR_FILE_NOT_FOUND |
||
2153 | jmp .ret0 |
||
2154 | .found: |
||
2155 | ; FAT does not support files larger than 4GB |
||
2156 | test ebx, ebx |
||
2157 | jz .l1 |
||
2158 | cmp dword [ebx+4], 0 |
||
2159 | jz @f |
||
2160 | .eof: |
||
2161 | popad |
||
2162 | push ERROR_END_OF_FILE |
||
2163 | jmp .ret0 |
||
2164 | @@: |
||
2165 | mov ebx, [ebx] |
||
2166 | .l1: |
||
2167 | ; now edi points to direntry, ebx=start byte to write, |
||
2168 | ; ecx=number of bytes to write, edx=data pointer |
||
2169 | |||
2170 | ; extend file if needed |
||
2171 | add ecx, ebx |
||
2172 | jc .eof ; FAT does not support files larger than 4GB |
||
2173 | push eax ; save directory sector |
||
2174 | push 0 ; return value=0 |
||
2175 | |||
2176 | call get_time_for_file |
||
2177 | mov [edi+22], ax ; last write time |
||
2178 | call get_date_for_file |
||
2179 | mov [edi+24], ax ; last write date |
||
2180 | mov [edi+18], ax ; last access date |
||
2181 | |||
2182 | push dword [edi+28] ; save current file size |
||
2183 | cmp ecx, [edi+28] |
||
2184 | jbe .length_ok |
||
2185 | cmp ecx, ebx |
||
2186 | jz .length_ok |
||
2187 | call hd_extend_file |
||
2188 | jnc .length_ok |
||
2189 | mov [esp+4], eax |
||
2190 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2191 | ; First two cases are fatal errors, in third case we may write some data |
||
2192 | cmp al, ERROR_DISK_FULL |
||
2193 | jz .disk_full |
||
2194 | pop eax |
||
2195 | pop eax |
||
2196 | mov [esp+4+28], eax |
||
2197 | pop eax |
||
2198 | popad |
||
2199 | xor ebx, ebx |
||
2200 | ret |
||
2201 | .disk_full: |
||
2202 | ; correct number of bytes to write |
||
2203 | mov ecx, [edi+28] |
||
2204 | cmp ecx, ebx |
||
2205 | ja .length_ok |
||
2206 | .ret: |
||
2207 | call update_disk |
||
2208 | cmp [hd_error], 0 |
||
2209 | jz @f |
||
2210 | mov byte [esp+4], 11 |
||
2211 | @@: |
||
2212 | pop eax |
||
2213 | pop eax |
||
2214 | mov [esp+4+28], eax ; eax=return value |
||
2215 | pop eax |
||
2216 | sub edx, [esp+20] |
||
2217 | mov [esp+16], edx ; ebx=number of written bytes |
||
2218 | popad |
||
2219 | ret |
||
2220 | .length_ok: |
||
2221 | mov esi, [edi+28] |
||
2222 | mov eax, [edi+20-2] |
||
2223 | mov ax, [edi+26] |
||
2224 | mov edi, eax ; edi=current cluster |
||
2225 | xor ebp, ebp ; ebp=current sector in cluster |
||
2226 | ; save directory |
||
2227 | mov eax, [esp+8] |
||
2228 | push ebx |
||
2229 | mov ebx, buffer |
||
2230 | call hd_write |
||
2231 | pop ebx |
||
2232 | cmp [hd_error], 0 |
||
2233 | jz @f |
||
2234 | .device_err: |
||
2235 | mov byte [esp+4], 11 |
||
2236 | jmp .ret |
||
2237 | @@: |
||
2238 | |||
2239 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
2240 | sub ecx, ebx |
||
2241 | jz .ret |
||
2242 | .write_loop: |
||
321 | diamond | 2243 | ; skip unmodified sectors |
2244 | cmp dword [esp], 0x200 |
||
2245 | jb .modify |
||
2246 | sub ebx, 0x200 |
||
2247 | jae .skip |
||
2248 | add ebx, 0x200 |
||
2249 | .modify: |
||
131 | diamond | 2250 | ; get length of data in current sector |
2251 | push ecx |
||
2252 | sub ebx, 0x200 |
||
2253 | jb .hasdata |
||
2254 | neg ebx |
||
2255 | xor ecx, ecx |
||
2256 | jmp @f |
||
2257 | .hasdata: |
||
2258 | neg ebx |
||
2259 | cmp ecx, ebx |
||
2260 | jbe @f |
||
2261 | mov ecx, ebx |
||
2262 | @@: |
||
2263 | ; get current sector number |
||
2264 | mov eax, edi |
||
2265 | dec eax |
||
2266 | dec eax |
||
2267 | imul eax, [SECTORS_PER_CLUSTER] |
||
2268 | add eax, [DATA_START] |
||
2269 | add eax, ebp |
||
2270 | ; load sector if needed |
||
2271 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
2272 | jz .noread |
||
2273 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2274 | jz .noread |
||
2275 | cmp ecx, esi ; (same for the last sector) |
||
2276 | jz .noread |
||
2277 | push ebx |
||
2278 | mov ebx, buffer |
||
2279 | call hd_read |
||
2280 | pop ebx |
||
2281 | cmp [hd_error], 0 |
||
2282 | jz @f |
||
2283 | .device_err2: |
||
2284 | pop ecx |
||
2285 | jmp .device_err |
||
2286 | @@: |
||
2287 | .noread: |
||
2288 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2289 | push eax ecx edi |
||
2290 | xor eax, eax |
||
2291 | mov ecx, 0x200 |
||
2292 | sub ecx, [esp+4+12] |
||
2293 | jbe @f |
||
2294 | mov edi, buffer |
||
2295 | add edi, [esp+4+12] |
||
2296 | rep stosb |
||
2297 | @@: |
||
2298 | ; zero uninitialized data in the last sector |
||
2299 | mov ecx, 0x200 |
||
2300 | sub ecx, esi |
||
2301 | jbe @f |
||
2302 | mov edi, buffer |
||
2303 | add edi, esi |
||
2304 | rep stosb |
||
2305 | @@: |
||
321 | diamond | 2306 | pop edi ecx |
131 | diamond | 2307 | ; copy new data |
2308 | mov eax, edx |
||
2309 | neg ebx |
||
2310 | jecxz @f |
||
2311 | add ebx, buffer+0x200 |
||
2312 | call memmove |
||
2313 | xor ebx, ebx |
||
2314 | @@: |
||
2315 | pop eax |
||
2316 | ; save sector |
||
2317 | push ebx |
||
2318 | mov ebx, buffer |
||
2319 | call hd_write |
||
2320 | pop ebx |
||
2321 | cmp [hd_error], 0 |
||
2322 | jnz .device_err2 |
||
2323 | add edx, ecx |
||
2324 | sub [esp], ecx |
||
2325 | pop ecx |
||
2326 | jz .ret |
||
321 | diamond | 2327 | .skip: |
131 | diamond | 2328 | ; next sector |
2329 | inc ebp |
||
2330 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2331 | jb @f |
||
2332 | xor ebp, ebp |
||
2333 | mov eax, edi |
||
2334 | call get_FAT |
||
2335 | mov edi, eax |
||
2336 | cmp [hd_error], 0 |
||
2337 | jnz .device_err |
||
2338 | @@: |
||
2339 | sub esi, 0x200 |
||
2340 | jae @f |
||
2341 | xor esi, esi |
||
2342 | @@: |
||
2343 | sub dword [esp], 0x200 |
||
2344 | jae @f |
||
2345 | and dword [esp], 0 |
||
2346 | @@: jmp .write_loop |
||
2347 | |||
2348 | hd_extend_file.zero_size: |
||
2349 | xor eax, eax |
||
2350 | jmp hd_extend_file.start_extend |
||
2351 | |||
2352 | ; extends file on hd to given size (new data area is undefined) |
||
2353 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 2354 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 2355 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
2356 | hd_extend_file: |
||
2357 | push ebp |
||
2358 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2359 | imul ebp, [BYTES_PER_SECTOR] |
||
2360 | push ecx |
||
2361 | ; find the last cluster of file |
||
2362 | mov eax, [edi+20-2] |
||
2363 | mov ax, [edi+26] |
||
2364 | mov ecx, [edi+28] |
||
2365 | jecxz .zero_size |
||
2366 | .last_loop: |
||
2367 | sub ecx, ebp |
||
2368 | jbe .last_found |
||
2369 | call get_FAT |
||
2370 | cmp [hd_error], 0 |
||
2371 | jz @f |
||
2372 | .device_err: |
||
2373 | pop ecx |
||
2374 | .device_err2: |
||
2375 | pop ebp |
||
2376 | push 11 |
||
2377 | .ret_err: |
||
2378 | pop eax |
||
2379 | stc |
||
2380 | ret |
||
2381 | @@: |
||
2382 | cmp eax, 2 |
||
2383 | jb .fat_err |
||
2384 | cmp eax, [fatRESERVED] |
||
2385 | jb .last_loop |
||
2386 | .fat_err: |
||
2387 | pop ecx ebp |
||
2388 | push ERROR_FAT_TABLE |
||
2389 | jmp .ret_err |
||
2390 | .last_found: |
||
2391 | push eax |
||
2392 | call get_FAT |
||
2393 | cmp [hd_error], 0 |
||
2394 | jz @f |
||
2395 | pop eax |
||
2396 | jmp .device_err |
||
2397 | @@: |
||
2398 | cmp eax, [fatRESERVED] |
||
2399 | pop eax |
||
2400 | jb .fat_err |
||
2401 | ; set length to full number of clusters |
||
2402 | sub [edi+28], ecx |
||
2403 | .start_extend: |
||
2404 | pop ecx |
||
2405 | ; now do extend |
||
2406 | push edx |
||
2407 | mov edx, 2 ; start scan from cluster 2 |
||
2408 | .extend_loop: |
||
2409 | cmp [edi+28], ecx |
||
2410 | jae .extend_done |
||
2411 | ; add new cluster |
||
2412 | push eax |
||
2413 | call get_free_FAT |
||
2414 | jc .disk_full |
||
2415 | mov edx, [fatEND] |
||
2416 | call set_FAT |
||
2417 | mov edx, eax |
||
2418 | pop eax |
||
2419 | test eax, eax |
||
2420 | jz .first_cluster |
||
2421 | push edx |
||
2422 | call set_FAT |
||
2423 | pop edx |
||
2424 | jmp @f |
||
2425 | .first_cluster: |
||
2426 | ror edx, 16 |
||
2427 | mov [edi+20], dx |
||
2428 | ror edx, 16 |
||
2429 | mov [edi+26], dx |
||
2430 | @@: |
||
133 | diamond | 2431 | push ecx |
2432 | mov ecx, -1 |
||
2433 | call add_disk_free_space |
||
2434 | pop ecx |
||
131 | diamond | 2435 | mov eax, edx |
2436 | cmp [hd_error], 0 |
||
2437 | jnz .device_err3 |
||
2438 | add [edi+28], ebp |
||
2439 | jmp .extend_loop |
||
2440 | .extend_done: |
||
2441 | mov [edi+28], ecx |
||
2442 | pop edx ebp |
||
133 | diamond | 2443 | xor eax, eax ; CF=0 |
131 | diamond | 2444 | ret |
2445 | .device_err3: |
||
2446 | pop edx |
||
2447 | jmp .device_err2 |
||
2448 | .disk_full: |
||
2449 | pop eax edx ebp |
||
2450 | push ERROR_DISK_FULL |
||
2451 | pop eax |
||
2452 | cmp [hd_error], 0 |
||
2453 | jz @f |
||
2454 | mov al, 11 |
||
2455 | @@: stc |
||
2456 | ret |
||
2457 | |||
133 | diamond | 2458 | ;---------------------------------------------------------------- |
2459 | ; |
||
2460 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
2461 | ; |
||
2462 | ; esi points to filename |
||
2463 | ; ebx points to 64-bit number = new file size |
||
2464 | ; ecx ignored (reserved) |
||
2465 | ; edx ignored (reserved) |
||
2466 | ; |
||
2467 | ; ret eax = 0 ok or other = errormsg |
||
2468 | ; |
||
2469 | ;-------------------------------------------------------------- |
||
2470 | fs_HdSetFileEnd: |
||
256 | diamond | 2471 | cmp [fs_type], 1 |
2472 | jz ntfs_HdSetFileEnd |
||
2473 | cmp [fs_type], 16 |
||
2474 | jz @f |
||
2475 | cmp [fs_type], 32 |
||
2476 | jz @f |
||
133 | diamond | 2477 | push ERROR_UNKNOWN_FS |
2478 | .ret: |
||
2479 | pop eax |
||
2480 | ret |
||
2481 | @@: |
||
2482 | cmp byte [esi], 0 |
||
2483 | jnz @f |
||
2484 | .access_denied: |
||
2485 | push ERROR_ACCESS_DENIED |
||
2486 | jmp .ret |
||
2487 | @@: |
||
2488 | push edi |
||
2489 | call hd_find_lfn |
||
2490 | pushfd |
||
2491 | cmp [hd_error], 0 |
||
2492 | jz @f |
||
2493 | popfd |
||
2494 | push 11 |
||
2495 | jmp .ret |
||
2496 | @@: |
||
2497 | popfd |
||
2498 | jnc @f |
||
2499 | pop edi |
||
2500 | push ERROR_FILE_NOT_FOUND |
||
2501 | jmp .ret |
||
2502 | @@: |
||
2503 | ; must not be directory |
||
2504 | test byte [edi+11], 10h |
||
2505 | jz @f |
||
2506 | pop edi |
||
2507 | jmp .access_denied |
||
2508 | @@: |
||
2509 | ; file size must not exceed 4 Gb |
||
2510 | cmp dword [ebx+4], 0 |
||
2511 | jz @f |
||
2512 | pop edi |
||
2513 | push ERROR_END_OF_FILE |
||
2514 | jmp .ret |
||
2515 | @@: |
||
2516 | push eax ; save directory sector |
||
2517 | ; set file modification date/time to current |
||
2518 | call fat_update_datetime |
||
2519 | mov eax, [ebx] |
||
2520 | cmp eax, [edi+28] |
||
2521 | jb .truncate |
||
2522 | ja .expand |
||
2523 | pop eax |
||
2524 | mov ebx, buffer |
||
2525 | call hd_write |
||
2526 | pop edi |
||
2527 | xor eax, eax |
||
2528 | cmp [hd_error], 0 |
||
2529 | jz @f |
||
2530 | mov al, 11 |
||
2531 | @@: |
||
2532 | ret |
||
2533 | .expand: |
||
2534 | push ebx ebp ecx |
||
2535 | push dword [edi+28] ; save old size |
||
2536 | mov ecx, eax |
||
2537 | call hd_extend_file |
||
2538 | push eax ; return code |
||
2539 | jnc .expand_ok |
||
2540 | cmp al, ERROR_DISK_FULL |
||
2541 | jz .disk_full |
||
2542 | .pop_ret: |
||
2543 | call update_disk |
||
2544 | pop eax ecx ebp ebx ecx edi edi |
||
2545 | ret |
||
2546 | .expand_ok: |
||
2547 | .disk_full: |
||
2548 | ; save directory |
||
2549 | mov eax, [edi+28] |
||
2550 | xchg eax, [esp+20] |
||
2551 | mov ebx, buffer |
||
2552 | call hd_write |
||
2553 | mov eax, [edi+20-2] |
||
2554 | mov ax, [edi+26] |
||
2555 | mov edi, eax |
||
2556 | cmp [hd_error], 0 |
||
2557 | jz @f |
||
2558 | .pop_ret11: |
||
2559 | mov byte [esp], 11 |
||
2560 | jmp .pop_ret |
||
2561 | @@: |
||
2562 | ; now zero new data |
||
2563 | xor ebp, ebp |
||
2564 | ; edi=current cluster, ebp=sector in cluster |
||
2565 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
||
2566 | .zero_loop: |
||
2567 | sub dword [esp+4], 0x200 |
||
2568 | jae .next_cluster |
||
2569 | lea eax, [edi-2] |
||
2570 | imul eax, [SECTORS_PER_CLUSTER] |
||
2571 | add eax, [DATA_START] |
||
2572 | add eax, ebp |
||
2573 | cmp dword [esp+4], -0x200 |
||
2574 | jz .noread |
||
2575 | mov ebx, buffer |
||
2576 | call hd_read |
||
2577 | cmp [hd_error], 0 |
||
2578 | jnz .err_next |
||
2579 | .noread: |
||
2580 | mov ecx, [esp+4] |
||
2581 | neg ecx |
||
2582 | push edi |
||
2583 | mov edi, buffer+0x200 |
||
2584 | add edi, [esp+8] |
||
2585 | push eax |
||
2586 | xor eax, eax |
||
2587 | mov [esp+12], eax |
||
2588 | rep stosb |
||
2589 | pop eax |
||
2590 | pop edi |
||
2591 | call hd_write |
||
2592 | cmp [hd_error], 0 |
||
2593 | jz .next_cluster |
||
2594 | .err_next: |
||
2595 | mov byte [esp], 11 |
||
2596 | .next_cluster: |
||
2597 | sub dword [esp+20], 0x200 |
||
2598 | jbe .pop_ret |
||
2599 | inc ebp |
||
2600 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2601 | jb .zero_loop |
||
2602 | xor ebp, ebp |
||
2603 | mov eax, edi |
||
2604 | call get_FAT |
||
2605 | mov edi, eax |
||
2606 | cmp [hd_error], 0 |
||
2607 | jnz .pop_ret11 |
||
2608 | jmp .zero_loop |
||
2609 | .truncate: |
||
2610 | mov [edi+28], eax |
||
2611 | push ecx |
||
2612 | mov ecx, [edi+20-2] |
||
2613 | mov cx, [edi+26] |
||
2614 | push eax |
||
2615 | test eax, eax |
||
2616 | jz .zero_size |
||
2617 | ; find new last cluster |
||
2618 | @@: |
||
2619 | mov eax, [SECTORS_PER_CLUSTER] |
||
2620 | shl eax, 9 |
||
2621 | sub [esp], eax |
||
2622 | jbe @f |
||
2623 | mov eax, ecx |
||
2624 | call get_FAT |
||
2625 | mov ecx, eax |
||
2626 | cmp [hd_error], 0 |
||
2627 | jz @b |
||
2628 | .device_err3: |
||
2629 | pop eax ecx eax edi |
||
2630 | push 11 |
||
2631 | pop eax |
||
2632 | ret |
||
2633 | @@: |
||
2634 | ; we will zero data at the end of last sector - remember it |
||
2635 | push ecx |
||
2636 | ; terminate FAT chain |
||
2637 | push edx |
||
2638 | mov eax, ecx |
||
2639 | mov edx, [fatEND] |
||
2640 | call set_FAT |
||
2641 | mov eax, edx |
||
2642 | pop edx |
||
2643 | cmp [hd_error], 0 |
||
2644 | jz @f |
||
2645 | .device_err4: |
||
2646 | pop ecx |
||
2647 | jmp .device_err3 |
||
2648 | .zero_size: |
||
2649 | and word [edi+20], 0 |
||
2650 | and word [edi+26], 0 |
||
2651 | push 0 |
||
2652 | mov eax, ecx |
||
2653 | @@: |
||
2654 | ; delete FAT chain |
||
2655 | call clear_cluster_chain |
||
2656 | cmp [hd_error], 0 |
||
2657 | jnz .device_err4 |
||
2658 | ; save directory |
||
2659 | mov eax, [esp+12] |
||
2660 | push ebx |
||
2661 | mov ebx, buffer |
||
2662 | call hd_write |
||
2663 | pop ebx |
||
2664 | cmp [hd_error], 0 |
||
2665 | jnz .device_err4 |
||
2666 | ; zero last sector, ignore errors |
||
2667 | pop ecx |
||
2668 | pop eax |
||
2669 | dec ecx |
||
2670 | imul ecx, [SECTORS_PER_CLUSTER] |
||
2671 | add ecx, [DATA_START] |
||
2672 | push eax |
||
2673 | sar eax, 9 |
||
2674 | add ecx, eax |
||
2675 | pop eax |
||
2676 | and eax, 0x1FF |
||
2677 | jz .truncate_done |
||
2678 | push ebx eax |
||
2679 | mov eax, ecx |
||
2680 | mov ebx, buffer |
||
2681 | call hd_read |
||
2682 | pop eax |
||
2683 | lea edi, [buffer+eax] |
||
2684 | push ecx |
||
2685 | mov ecx, 0x200 |
||
2686 | sub ecx, eax |
||
2687 | xor eax, eax |
||
2688 | rep stosb |
||
2689 | pop eax |
||
2690 | call hd_write |
||
2691 | pop ebx |
||
2692 | .truncate_done: |
||
2693 | pop ecx eax edi |
||
2694 | call update_disk |
||
2695 | xor eax, eax |
||
2696 | cmp [hd_error], 0 |
||
2697 | jz @f |
||
2698 | mov al, 11 |
||
2699 | @@: |
||
2700 | ret |
||
2701 | |||
86 | diamond | 2702 | fs_HdGetFileInfo: |
256 | diamond | 2703 | cmp [fs_type], 1 |
2704 | jz ntfs_HdGetFileInfo |
||
2705 | cmp [fs_type], 16 |
||
2706 | jz @f |
||
2707 | cmp [fs_type], 32 |
||
2708 | jz @f |
||
86 | diamond | 2709 | mov eax, ERROR_UNKNOWN_FS |
2710 | ret |
||
2711 | @@: |
||
2712 | cmp byte [esi], 0 |
||
2713 | jnz @f |
||
2714 | mov eax, 2 |
||
2715 | ret |
||
2716 | @@: |
||
2717 | push edi |
||
2718 | call hd_find_lfn |
||
2719 | pushfd |
||
2720 | cmp [hd_error], 0 |
||
2721 | jz @f |
||
2722 | popfd |
||
2723 | pop edi |
||
2724 | mov eax, 11 |
||
2725 | ret |
||
2726 | @@: |
||
2727 | popfd |
||
2728 | jmp fs_GetFileInfo_finish |
||
2729 | |||
2730 | fs_HdSetFileInfo: |
||
256 | diamond | 2731 | cmp [fs_type], 1 |
2732 | jz ntfs_HdSetFileInfo |
||
2733 | cmp [fs_type], 16 |
||
2734 | jz @f |
||
2735 | cmp [fs_type], 32 |
||
2736 | jz @f |
||
86 | diamond | 2737 | mov eax, ERROR_UNKNOWN_FS |
2738 | ret |
||
2739 | @@: |
||
2740 | cmp byte [esi], 0 |
||
2741 | jnz @f |
||
2742 | mov eax, 2 |
||
2743 | ret |
||
2744 | @@: |
||
2745 | push edi |
||
2746 | call hd_find_lfn |
||
2747 | pushfd |
||
2748 | cmp [hd_error], 0 |
||
2749 | jz @f |
||
2750 | popfd |
||
2751 | pop edi |
||
2752 | mov eax, 11 |
||
2753 | ret |
||
2754 | @@: |
||
2755 | popfd |
||
2756 | jnc @f |
||
2757 | pop edi |
||
2758 | mov eax, ERROR_FILE_NOT_FOUND |
||
2759 | ret |
||
2760 | @@: |
||
2761 | push eax |
||
2762 | call bdfe_to_fat_entry |
||
2763 | pop eax |
||
2764 | mov ebx, buffer |
||
2765 | call hd_write |
||
2766 | call update_disk |
||
2767 | pop edi |
||
2768 | xor eax, eax |
||
2769 | ret |
||
2770 | |||
91 | diamond | 2771 | ;---------------------------------------------------------------- |
2772 | ; |
||
171 | diamond | 2773 | ; fs_HdDelete - delete file or empty folder from hard disk |
2774 | ; |
||
2775 | ; esi points to filename |
||
2776 | ; |
||
2777 | ; ret eax = 0 ok or other = errormsg |
||
2778 | ; |
||
2779 | ;-------------------------------------------------------------- |
||
2780 | fs_HdDelete: |
||
256 | diamond | 2781 | cmp [fs_type], 1 |
2782 | jz ntfs_HdDelete |
||
2783 | cmp [fs_type], 16 |
||
2784 | jz @f |
||
2785 | cmp [fs_type], 32 |
||
2786 | jz @f |
||
171 | diamond | 2787 | push ERROR_UNKNOWN_FS |
2788 | .pop_ret: |
||
2789 | pop eax |
||
2790 | ret |
||
2791 | @@: |
||
2792 | cmp byte [esi], 0 |
||
2793 | jnz @f |
||
2794 | ; cannot delete root! |
||
2795 | .access_denied: |
||
2796 | push ERROR_ACCESS_DENIED |
||
2797 | jmp .pop_ret |
||
2798 | @@: |
||
2799 | and [longname_sec1], 0 |
||
2800 | and [longname_sec2], 0 |
||
2801 | push edi |
||
2802 | call hd_find_lfn |
||
2803 | jnc .found |
||
2804 | pop edi |
||
2805 | push ERROR_FILE_NOT_FOUND |
||
2806 | jmp .pop_ret |
||
2807 | .found: |
||
2808 | cmp dword [edi], '. ' |
||
2809 | jz .access_denied2 |
||
2810 | cmp dword [edi], '.. ' |
||
2811 | jz .access_denied2 |
||
2812 | test byte [edi+11], 10h |
||
2813 | jz .dodel |
||
2814 | ; we can delete only empty folders! |
||
2815 | pushad |
||
2816 | mov ebp, [edi+20-2] |
||
2817 | mov bp, [edi+26] |
||
2818 | xor ecx, ecx |
||
2819 | lea eax, [ebp-2] |
||
2820 | imul eax, [SECTORS_PER_CLUSTER] |
||
2821 | add eax, [DATA_START] |
||
2822 | mov ebx, buffer |
||
2823 | call hd_read |
||
2824 | cmp [hd_error], 0 |
||
2825 | jnz .err1 |
||
2826 | add ebx, 2*0x20 |
||
2827 | .checkempty: |
||
2828 | cmp byte [ebx], 0 |
||
2829 | jz .empty |
||
2830 | cmp byte [ebx], 0xE5 |
||
2831 | jnz .notempty |
||
2832 | add ebx, 0x20 |
||
2833 | cmp ebx, buffer+0x200 |
||
2834 | jb .checkempty |
||
2835 | inc ecx |
||
2836 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
2837 | jb @f |
||
2838 | mov eax, ebp |
||
2839 | call get_FAT |
||
2840 | cmp [hd_error], 0 |
||
2841 | jnz .err1 |
||
2842 | mov ebp, eax |
||
2843 | xor ecx, ecx |
||
2844 | @@: |
||
2845 | lea eax, [ebp-2] |
||
2846 | imul eax, [SECTORS_PER_CLUSTER] |
||
2847 | add eax, [DATA_START] |
||
2848 | add eax, ecx |
||
2849 | mov ebx, buffer |
||
2850 | call hd_read |
||
2851 | cmp [hd_error], 0 |
||
2852 | jz .checkempty |
||
2853 | .err1: |
||
2854 | popad |
||
2855 | .err2: |
||
2856 | pop edi |
||
2857 | push 11 |
||
2858 | pop eax |
||
2859 | ret |
||
2860 | .notempty: |
||
2861 | popad |
||
2862 | .access_denied2: |
||
2863 | pop edi |
||
2864 | push ERROR_ACCESS_DENIED |
||
2865 | pop eax |
||
2866 | ret |
||
2867 | .empty: |
||
2868 | popad |
||
2869 | push ebx |
||
2870 | mov ebx, buffer |
||
2871 | call hd_read |
||
2872 | pop ebx |
||
2873 | cmp [hd_error], 0 |
||
2874 | jnz .err2 |
||
2875 | .dodel: |
||
2876 | push eax |
||
2877 | mov eax, [edi+20-2] |
||
2878 | mov ax, [edi+26] |
||
2879 | xchg eax, [esp] |
||
2880 | ; delete folder entry |
||
2881 | mov byte [edi], 0xE5 |
||
2882 | ; delete LFN (if present) |
||
2883 | .lfndel: |
||
2884 | cmp edi, buffer |
||
2885 | ja @f |
||
2886 | cmp [longname_sec2], 0 |
||
2887 | jz .lfndone |
||
2888 | push [longname_sec2] |
||
2889 | push [longname_sec1] |
||
2890 | pop [longname_sec2] |
||
2891 | and [longname_sec1], 0 |
||
2892 | push ebx |
||
2893 | mov ebx, buffer |
||
2894 | call hd_write |
||
2895 | mov eax, [esp+4] |
||
2896 | call hd_read |
||
2897 | pop ebx |
||
2898 | pop eax |
||
2899 | mov edi, buffer+0x200 |
||
2900 | @@: |
||
2901 | sub edi, 0x20 |
||
2902 | cmp byte [edi], 0xE5 |
||
2903 | jz .lfndone |
||
2904 | cmp byte [edi+11], 0xF |
||
2905 | jnz .lfndone |
||
2906 | mov byte [edi], 0xE5 |
||
2907 | jmp .lfndel |
||
2908 | .lfndone: |
||
2909 | push ebx |
||
2910 | mov ebx, buffer |
||
2911 | call hd_write |
||
2912 | pop ebx |
||
2913 | ; delete FAT chain |
||
2914 | pop eax |
||
2915 | call clear_cluster_chain |
||
2916 | call update_disk |
||
2917 | pop edi |
||
2918 | xor eax, eax |
||
2919 | cmp [hd_error], 0 |
||
2920 | jz @f |
||
2921 | mov al, 11 |
||
2922 | @@: |
||
2923 | ret |
||
2924 | |||
74 | mario79 | 2925 | ; \end{diamond}=>=>>> |