Rev 1124 | 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: 1124 $ |
48 | |||
49 | |||
1 | ha | 50 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
51 | |||
52 | mikedld | 52 | ERROR_SUCCESS = 0 |
53 | ERROR_DISK_BASE = 1 |
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54 | ERROR_UNSUPPORTED_FS = 2 |
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55 | ERROR_UNKNOWN_FS = 3 |
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56 | ERROR_PARTITION = 4 |
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57 | ERROR_FILE_NOT_FOUND = 5 |
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58 | ERROR_END_OF_FILE = 6 |
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59 | ERROR_MEMORY_POINTER = 7 |
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60 | ERROR_DISK_FULL = 8 |
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61 | ERROR_FAT_TABLE = 9 |
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62 | ERROR_ACCESS_DENIED = 10 |
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1 | ha | 63 | |
64 | PUSHAD_EAX equ [esp+28] |
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65 | PUSHAD_ECX equ [esp+24] |
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66 | PUSHAD_EDX equ [esp+20] |
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67 | PUSHAD_EBX equ [esp+16] |
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68 | PUSHAD_EBP equ [esp+8] |
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69 | PUSHAD_ESI equ [esp+4] |
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70 | PUSHAD_EDI equ [esp+0] |
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71 | |||
171 | diamond | 72 | uglobal |
73 | align 4 |
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1 | ha | 74 | partition_count dd 0 ; partitions found by set_FAT32_variables |
75 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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76 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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77 | |||
78 | hd_error dd 0 ; set by wait_for_sector_buffer |
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79 | hd_setup dd 0 |
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80 | hd_wait_timeout dd 0 |
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81 | |||
82 | cluster_tmp dd 0 ; used by analyze_directory |
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83 | ; and analyze_directory_to_write |
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84 | |||
85 | file_size dd 0 ; used by file_read |
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86 | |||
87 | cache_search_start dd 0 ; used by find_empty_slot |
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171 | diamond | 88 | endg |
1 | ha | 89 | |
171 | diamond | 90 | iglobal |
1 | ha | 91 | fat_in_cache dd -1 |
171 | diamond | 92 | endg |
1 | ha | 93 | |
94 | uglobal |
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171 | diamond | 95 | align 4 |
96 | fat_cache: times 512 db 0 |
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1 | ha | 97 | Sector512: ; label for dev_hdcd.inc |
98 | buffer: times 512 db 0 |
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133 | diamond | 99 | fsinfo_buffer: times 512 db 0 |
1 | ha | 100 | endg |
101 | |||
102 | uglobal |
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103 | fat16_root db 0 ; flag for fat16 rootdir |
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104 | fat_change db 0 ; 1=fat has changed |
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105 | endg |
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106 | |||
107 | reserve_hd1: |
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108 | |||
109 | cli |
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110 | cmp [hd1_status],0 |
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111 | je reserve_ok1 |
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112 | |||
113 | sti |
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114 | call change_task |
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115 | jmp reserve_hd1 |
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116 | |||
117 | reserve_ok1: |
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118 | |||
119 | push eax |
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379 | serge | 120 | mov eax,[CURRENT_TASK] |
1 | ha | 121 | shl eax,5 |
379 | serge | 122 | mov eax,[eax+CURRENT_TASK+TASKDATA.pid] |
1 | ha | 123 | mov [hd1_status],eax |
124 | pop eax |
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125 | sti |
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126 | ret |
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95 | mario79 | 127 | ;******************************************** |
321 | diamond | 128 | |
129 | uglobal |
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130 | hd_in_cache db ? |
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131 | endg |
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132 | |||
95 | mario79 | 133 | reserve_hd_channel: |
709 | diamond | 134 | ; BIOS disk accesses are protected with common mutex hd1_status |
135 | ; This must be modified when hd1_status will not be valid! |
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136 | cmp [hdpos], 0x80 |
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137 | jae .ret |
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95 | mario79 | 138 | cmp [hdbase], 0x1F0 |
139 | jne .IDE_Channel_2 |
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140 | .IDE_Channel_1: |
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141 | cli |
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142 | cmp [IDE_Channel_1],0 |
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143 | je .reserve_ok_1 |
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144 | sti |
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145 | call change_task |
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146 | jmp .IDE_Channel_1 |
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147 | .IDE_Channel_2: |
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148 | cli |
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149 | cmp [IDE_Channel_2],0 |
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150 | je .reserve_ok_2 |
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151 | sti |
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152 | call change_task |
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321 | diamond | 153 | jmp .IDE_Channel_2 |
95 | mario79 | 154 | .reserve_ok_1: |
321 | diamond | 155 | mov [IDE_Channel_1], 1 |
156 | push eax |
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157 | mov al, 1 |
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158 | jmp @f |
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95 | mario79 | 159 | .reserve_ok_2: |
321 | diamond | 160 | mov [IDE_Channel_2], 1 |
161 | push eax |
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162 | mov al, 3 |
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163 | @@: |
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164 | cmp [hdid], 1 |
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165 | sbb al, -1 |
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166 | cmp al, [hd_in_cache] |
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167 | jz @f |
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168 | mov [hd_in_cache], al |
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169 | call clear_hd_cache |
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170 | @@: |
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171 | pop eax |
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709 | diamond | 172 | .ret: |
321 | diamond | 173 | ret |
174 | |||
95 | mario79 | 175 | free_hd_channel: |
709 | diamond | 176 | ; see comment at reserve_hd_channel |
177 | cmp [hdpos], 0x80 |
||
178 | jae .ret |
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95 | mario79 | 179 | cmp [hdbase], 0x1F0 |
180 | jne .IDE_Channel_2 |
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181 | .IDE_Channel_1: |
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182 | mov [IDE_Channel_1],0 |
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709 | diamond | 183 | .ret: |
95 | mario79 | 184 | ret |
185 | .IDE_Channel_2: |
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186 | mov [IDE_Channel_2],0 |
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187 | ret |
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188 | ;******************************************** |
||
379 | serge | 189 | problem_partition db 0 ; used for partitions search |
1 | ha | 190 | |
65 | mario79 | 191 | include 'part_set.inc' |
1 | ha | 192 | |
193 | set_FAT: |
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194 | ;-------------------------------- |
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195 | ; input : EAX = cluster |
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196 | ; EDX = value to save |
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197 | ; output : EDX = old value |
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198 | ;-------------------------------- |
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199 | push eax ebx esi |
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200 | |||
201 | cmp eax,2 |
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202 | jb sfc_error |
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203 | cmp eax,[LAST_CLUSTER] |
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204 | ja sfc_error |
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256 | diamond | 205 | cmp [fs_type],16 |
1 | ha | 206 | je sfc_1 |
207 | add eax,eax |
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208 | sfc_1: |
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209 | add eax,eax |
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210 | mov esi,511 |
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211 | and esi,eax ; esi = position in fat sector |
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212 | shr eax,9 ; eax = fat sector |
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213 | add eax,[FAT_START] |
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214 | mov ebx,fat_cache |
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215 | |||
216 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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217 | je sfc_in_cache ; yes |
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218 | |||
219 | cmp [fat_change],0 ; is fat changed? |
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220 | je sfc_no_change ; no |
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221 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 222 | cmp [hd_error],0 |
223 | jne sfc_error |
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1 | ha | 224 | |
225 | sfc_no_change: |
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226 | mov [fat_in_cache],eax ; save fat sector |
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227 | call hd_read |
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74 | mario79 | 228 | cmp [hd_error],0 |
229 | jne sfc_error |
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1 | ha | 230 | |
379 | serge | 231 | |
1 | ha | 232 | sfc_in_cache: |
256 | diamond | 233 | cmp [fs_type],16 |
1 | ha | 234 | jne sfc_test32 |
235 | |||
236 | sfc_set16: |
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237 | xchg [ebx+esi],dx ; save new value and get old value |
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238 | jmp sfc_write |
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239 | |||
240 | sfc_test32: |
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241 | mov eax,[fatMASK] |
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242 | |||
243 | sfc_set32: |
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244 | and edx,eax |
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245 | xor eax,-1 ; mask for high bits |
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246 | and eax,[ebx+esi] ; get high 4 bits |
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247 | or eax,edx |
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248 | mov edx,[ebx+esi] ; get old value |
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249 | mov [ebx+esi],eax ; save new value |
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250 | |||
251 | sfc_write: |
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252 | mov [fat_change],1 ; fat has changed |
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253 | |||
254 | sfc_nonzero: |
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255 | and edx,[fatMASK] |
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256 | |||
257 | sfc_error: |
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258 | pop esi ebx eax |
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259 | ret |
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260 | |||
261 | |||
262 | get_FAT: |
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263 | ;-------------------------------- |
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264 | ; input : EAX = cluster |
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265 | ; output : EAX = next cluster |
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266 | ;-------------------------------- |
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267 | push ebx esi |
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268 | |||
256 | diamond | 269 | cmp [fs_type],16 |
1 | ha | 270 | je gfc_1 |
271 | add eax,eax |
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272 | gfc_1: |
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273 | add eax,eax |
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274 | mov esi,511 |
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275 | and esi,eax ; esi = position in fat sector |
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276 | shr eax,9 ; eax = fat sector |
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277 | add eax,[FAT_START] |
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278 | mov ebx,fat_cache |
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279 | |||
280 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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281 | je gfc_in_cache |
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282 | |||
283 | cmp [fat_change],0 ; is fat changed? |
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284 | je gfc_no_change ; no |
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285 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 286 | cmp [hd_error],0 |
287 | jne hd_error_01 |
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1 | ha | 288 | |
289 | gfc_no_change: |
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290 | mov [fat_in_cache],eax |
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291 | call hd_read |
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74 | mario79 | 292 | cmp [hd_error],0 |
293 | jne hd_error_01 |
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1 | ha | 294 | |
295 | gfc_in_cache: |
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296 | mov eax,[ebx+esi] |
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297 | and eax,[fatMASK] |
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74 | mario79 | 298 | hd_error_01: |
1 | ha | 299 | pop esi ebx |
300 | ret |
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301 | |||
302 | |||
303 | get_free_FAT: |
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304 | ;----------------------------------------------------------- |
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305 | ; output : if CARRY=0 EAX = # first cluster found free |
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306 | ; if CARRY=1 disk full |
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307 | ; Note : for more speed need to use fat_cache directly |
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308 | ;----------------------------------------------------------- |
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309 | push ecx |
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310 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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311 | sub ecx,2 |
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649 | diamond | 312 | mov eax,[fatStartScan] |
313 | cmp eax,2 |
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314 | jb gff_reset |
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1 | ha | 315 | |
316 | gff_test: |
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317 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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318 | jbe gff_in_range |
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649 | diamond | 319 | gff_reset: |
1 | ha | 320 | mov eax,2 |
321 | |||
322 | gff_in_range: |
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323 | push eax |
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324 | call get_FAT ; get cluster state |
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74 | mario79 | 325 | cmp [hd_error],0 |
326 | jne gff_not_found_1 |
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327 | |||
1 | ha | 328 | test eax,eax ; is it free? |
329 | pop eax |
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330 | je gff_found ; yes |
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331 | inc eax ; next cluster |
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332 | dec ecx ; is all checked? |
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333 | jns gff_test ; no |
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334 | |||
74 | mario79 | 335 | gff_not_found_1: |
336 | add esp,4 |
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1 | ha | 337 | gff_not_found: |
338 | pop ecx ; yes. disk is full |
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339 | stc |
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340 | ret |
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341 | |||
342 | gff_found: |
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649 | diamond | 343 | lea ecx,[eax+1] |
344 | mov [fatStartScan],ecx |
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1 | ha | 345 | pop ecx |
346 | clc |
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347 | ret |
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348 | |||
349 | |||
350 | write_fat_sector: |
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351 | ;----------------------------------------------------------- |
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352 | ; write changed fat to disk |
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353 | ;----------------------------------------------------------- |
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354 | push eax ebx ecx |
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355 | |||
356 | mov [fat_change],0 |
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357 | mov eax,[fat_in_cache] |
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358 | cmp eax,-1 |
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359 | jz write_fat_not_used |
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360 | mov ebx,fat_cache |
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361 | mov ecx,[NUMBER_OF_FATS] |
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362 | |||
363 | write_next_fat: |
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364 | call hd_write |
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74 | mario79 | 365 | cmp [hd_error],0 |
366 | jne write_fat_not_used |
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367 | |||
1 | ha | 368 | add eax,[SECTORS_PER_FAT] |
369 | dec ecx |
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370 | jnz write_next_fat |
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371 | |||
372 | write_fat_not_used: |
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373 | pop ecx ebx eax |
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374 | ret |
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375 | |||
376 | |||
377 | analyze_directory: |
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378 | ;----------------------------------------------------------- |
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379 | ; input : EAX = first cluster of the directory |
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380 | ; EBX = pointer to filename |
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381 | ; output : IF CARRY=0 EAX = sector where th file is found |
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382 | ; EBX = pointer in buffer |
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383 | ; [buffer .. buffer+511] |
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384 | ; ECX,EDX,ESI,EDI not changed |
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385 | ; IF CARRY=1 filename not found |
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386 | ; Note : if cluster=0 it's changed to read rootdir |
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387 | ; save 2 previous directory sectors in longname_sec |
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388 | ;----------------------------------------------------------- |
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389 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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390 | mov [longname_sec1],0 |
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391 | mov [longname_sec2],0 |
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392 | |||
393 | adr_new_cluster: |
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394 | mov [cluster_tmp],eax |
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395 | mov [fat16_root],0 |
||
396 | cmp eax,[LAST_CLUSTER] |
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397 | ja adr_not_found ; too big cluster number, something is wrong |
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398 | cmp eax,2 |
||
399 | jnb adr_data_cluster |
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400 | |||
401 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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256 | diamond | 402 | cmp [fs_type],16 |
1 | ha | 403 | jne adr_data_cluster |
404 | mov eax,[ROOT_START] |
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405 | mov edx,[ROOT_SECTORS] |
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406 | mov [fat16_root],1 ; flag for fat16 rootdir |
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407 | jmp adr_new_sector |
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408 | |||
409 | adr_data_cluster: |
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410 | sub eax,2 |
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411 | mov edx,[SECTORS_PER_CLUSTER] |
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412 | imul eax,edx |
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413 | add eax,[DATA_START] |
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414 | |||
415 | adr_new_sector: |
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416 | mov ebx,buffer |
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417 | call hd_read |
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74 | mario79 | 418 | cmp [hd_error],0 |
419 | jne adr_not_found |
||
420 | |||
1 | ha | 421 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
422 | |||
423 | adr_analyze: |
||
424 | mov edi,[ebx+11] ; file attribute |
||
425 | and edi,0xf |
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426 | cmp edi,0xf |
||
427 | je adr_long_filename |
||
428 | test edi,0x8 ; skip over volume label |
||
429 | jne adr_long_filename ; Note: label can be same name as file/dir |
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430 | |||
431 | mov esi,[esp+0] ; filename need to be uppercase |
||
432 | mov edi,ebx |
||
433 | push ecx |
||
434 | mov ecx,11 |
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435 | cld |
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436 | rep cmpsb ; compare 8+3 filename |
||
437 | pop ecx |
||
438 | je adr_found |
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439 | |||
440 | adr_long_filename: |
||
441 | add ebx,32 ; position of next dir entry |
||
442 | dec ecx |
||
443 | jnz adr_analyze |
||
444 | |||
445 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
||
446 | mov [longname_sec1],eax ; for delete long filename |
||
447 | mov [longname_sec2],ecx |
||
448 | inc eax ; next sector |
||
449 | dec edx |
||
450 | jne adr_new_sector |
||
451 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
452 | je adr_not_found |
||
453 | |||
454 | adr_next_cluster: |
||
455 | mov eax,[cluster_tmp] |
||
456 | call get_FAT ; get next cluster |
||
74 | mario79 | 457 | cmp [hd_error],0 |
458 | jne adr_not_found |
||
459 | |||
1 | ha | 460 | cmp eax,2 ; incorrect fat chain? |
461 | jb adr_not_found ; yes |
||
462 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
463 | jb adr_new_cluster ; no. analyse it |
||
464 | |||
465 | adr_not_found: |
||
466 | pop edi edi esi edx ecx ; first edi will remove ebx |
||
467 | stc ; file not found |
||
468 | ret |
||
469 | |||
470 | adr_found: |
||
471 | pop edi edi esi edx ecx ; first edi will remove ebx |
||
472 | clc ; file found |
||
473 | ret |
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474 | |||
475 | |||
476 | get_data_cluster: |
||
477 | ;----------------------------------------------------------- |
||
478 | ; input : EAX = cluster |
||
479 | ; EBX = pointer to buffer |
||
480 | ; EDX = # blocks to read in buffer |
||
481 | ; ESI = # blocks to skip over |
||
482 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
483 | ; if CARRY=1 cluster out of range |
||
484 | ; Note : if cluster=0 it's changed to read rootdir |
||
485 | ;----------------------------------------------------------- |
||
486 | push eax ecx |
||
487 | |||
488 | mov [fat16_root],0 |
||
489 | cmp eax,[LAST_CLUSTER] |
||
490 | ja gdc_error ; too big cluster number, something is wrong |
||
491 | cmp eax,2 |
||
492 | jnb gdc_cluster |
||
493 | |||
494 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
256 | diamond | 495 | cmp [fs_type],16 |
1 | ha | 496 | jne gdc_cluster |
497 | mov eax,[ROOT_START] |
||
498 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
499 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
500 | jmp gdc_read |
||
501 | |||
502 | gdc_cluster: |
||
503 | sub eax,2 |
||
504 | mov ecx,[SECTORS_PER_CLUSTER] |
||
505 | imul eax,ecx |
||
506 | add eax,[DATA_START] |
||
507 | |||
508 | gdc_read: |
||
509 | test esi,esi ; first wanted block |
||
510 | je gdcl1 ; yes, skip count is 0 |
||
511 | dec esi |
||
512 | jmp gdcl2 |
||
513 | |||
514 | gdcl1: |
||
515 | call hd_read |
||
74 | mario79 | 516 | cmp [hd_error],0 |
379 | serge | 517 | jne gdc_error |
74 | mario79 | 518 | |
1 | ha | 519 | add ebx,512 ; update pointer |
520 | dec edx |
||
521 | |||
522 | gdcl2: |
||
523 | test edx,edx ; is all read? |
||
524 | je out_of_read |
||
525 | |||
526 | inc eax ; next sector |
||
527 | dec ecx |
||
528 | jnz gdc_read |
||
529 | |||
530 | out_of_read: |
||
531 | pop ecx eax |
||
532 | clc |
||
533 | ret |
||
534 | |||
535 | gdc_error: |
||
536 | pop ecx eax |
||
537 | stc |
||
538 | ret |
||
539 | |||
540 | |||
541 | get_cluster_of_a_path: |
||
542 | ;--------------------------------------------------------- |
||
543 | ; input : EBX = pointer to a path string |
||
544 | ; (example: the path "/files/data/document" become |
||
545 | ; "files......data.......document...0" |
||
546 | ; '.' = space char |
||
547 | ; '0' = char(0) (ASCII=0) !!! ) |
||
548 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
549 | ; if (CARRY=0) -> EAX=cluster |
||
550 | ;--------------------------------------------------------- |
||
551 | push ebx edx |
||
552 | |||
553 | mov eax,[ROOT_CLUSTER] |
||
554 | mov edx,ebx |
||
555 | |||
556 | search_end_of_path: |
||
557 | cmp byte [edx],0 |
||
558 | je found_end_of_path |
||
559 | |||
560 | inc edx ; '/' |
||
561 | mov ebx,edx |
||
562 | call analyze_directory |
||
563 | jc directory_not_found |
||
564 | |||
565 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
566 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
567 | and eax,[fatMASK] |
||
568 | add edx,11 ; 8+3 (name+extension) |
||
569 | jmp search_end_of_path |
||
570 | |||
571 | found_end_of_path: |
||
572 | pop edx ebx |
||
573 | clc ; no errors |
||
574 | ret |
||
575 | |||
576 | directory_not_found: |
||
577 | pop edx ebx |
||
578 | stc ; errors occour |
||
579 | ret |
||
580 | |||
581 | |||
582 | bcd2bin: |
||
583 | ;---------------------------------- |
||
584 | ; input : AL=BCD number (eg. 0x11) |
||
585 | ; output : AH=0 |
||
586 | ; AL=decimal number (eg. 11) |
||
587 | ;---------------------------------- |
||
588 | xor ah,ah |
||
589 | shl ax,4 |
||
590 | shr al,4 |
||
591 | aad |
||
592 | ret |
||
593 | |||
594 | |||
595 | get_date_for_file: |
||
596 | ;----------------------------------------------------- |
||
597 | ; Get date from CMOS and pack day,month,year in AX |
||
598 | ; DATE bits 0..4 : day of month 0..31 |
||
599 | ; 5..8 : month of year 1..12 |
||
600 | ; 9..15 : count of years from 1980 |
||
601 | ;----------------------------------------------------- |
||
602 | mov al,0x7 ;day |
||
603 | out 0x70,al |
||
604 | in al,0x71 |
||
605 | call bcd2bin |
||
606 | ror eax,5 |
||
607 | |||
608 | mov al,0x8 ;month |
||
609 | out 0x70,al |
||
610 | in al,0x71 |
||
611 | call bcd2bin |
||
612 | ror eax,4 |
||
613 | |||
614 | mov al,0x9 ;year |
||
615 | out 0x70,al |
||
616 | in al,0x71 |
||
617 | call bcd2bin |
||
618 | add ax,20 ;because CMOS return only the two last |
||
619 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
620 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
621 | ret |
||
622 | |||
623 | |||
624 | get_time_for_file: |
||
625 | ;----------------------------------------------------- |
||
626 | ; Get time from CMOS and pack hour,minute,second in AX |
||
627 | ; TIME bits 0..4 : second (the low bit is lost) |
||
628 | ; 5..10 : minute 0..59 |
||
629 | ; 11..15 : hour 0..23 |
||
630 | ;----------------------------------------------------- |
||
631 | mov al,0x0 ;second |
||
632 | out 0x70,al |
||
633 | in al,0x71 |
||
634 | call bcd2bin |
||
635 | ror eax,6 |
||
636 | |||
637 | mov al,0x2 ;minute |
||
638 | out 0x70,al |
||
639 | in al,0x71 |
||
640 | call bcd2bin |
||
641 | ror eax,6 |
||
642 | |||
643 | mov al,0x4 ;hour |
||
644 | out 0x70,al |
||
645 | in al,0x71 |
||
646 | call bcd2bin |
||
647 | rol eax,11 |
||
648 | ret |
||
649 | |||
650 | |||
651 | set_current_time_for_entry: |
||
652 | ;----------------------------------------------------- |
||
653 | ; Set current time/date for file entry |
||
654 | ; input : ebx = file entry pointer |
||
655 | ;----------------------------------------------------- |
||
656 | push eax |
||
657 | call get_time_for_file ; update files date/time |
||
658 | mov [ebx+22],ax |
||
659 | call get_date_for_file |
||
660 | mov [ebx+24],ax |
||
661 | pop eax |
||
662 | ret |
||
663 | |||
664 | |||
665 | |||
666 | add_disk_free_space: |
||
667 | ;----------------------------------------------------- |
||
668 | ; input : ecx = cluster count |
||
669 | ; Note : negative = remove clusters from free space |
||
670 | ; positive = add clusters to free space |
||
671 | ;----------------------------------------------------- |
||
672 | test ecx,ecx ; no change |
||
673 | je add_dfs_no |
||
256 | diamond | 674 | cmp [fs_type],32 ; free disk space only used by fat32 |
1 | ha | 675 | jne add_dfs_no |
676 | |||
677 | push eax ebx |
||
678 | mov eax,[ADR_FSINFO] |
||
133 | diamond | 679 | mov ebx,fsinfo_buffer |
1 | ha | 680 | call hd_read |
74 | mario79 | 681 | cmp [hd_error],0 |
682 | jne add_not_fs |
||
683 | |||
1 | ha | 684 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
685 | jne add_not_fs |
||
686 | |||
687 | add [ebx+0x1e8],ecx |
||
654 | diamond | 688 | push [fatStartScan] |
689 | pop dword [ebx+0x1ec] |
||
1 | ha | 690 | call hd_write |
133 | diamond | 691 | ; cmp [hd_error],0 |
692 | ; jne add_not_fs |
||
1 | ha | 693 | |
694 | add_not_fs: |
||
695 | pop ebx eax |
||
696 | |||
697 | add_dfs_no: |
||
698 | ret |
||
699 | |||
700 | |||
701 | file_read: |
||
702 | ;-------------------------------------------------------------------------- |
||
703 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
704 | ; |
||
705 | ; EAX EDI system call to write / |
||
706 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
707 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
708 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
709 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
710 | ; EDI ESI vt first 512 block to read |
||
711 | ; EDI if 0 - read root |
||
712 | ; |
||
713 | ; output : eax = 0 - ok |
||
714 | ; 3 - unknown FS |
||
715 | ; 5 - file not found |
||
716 | ; 6 - end of file |
||
717 | ; 9 - fat table corrupted |
||
74 | mario79 | 718 | ; 10 - access denied |
1 | ha | 719 | ; ebx = size of file/directory |
720 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 721 | cmp [fs_type], 16 |
722 | jz fat_ok_for_reading |
||
723 | cmp [fs_type], 32 |
||
724 | jz fat_ok_for_reading |
||
1 | ha | 725 | xor ebx,ebx |
726 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 727 | mov [hd1_status], ebx |
1 | ha | 728 | ret |
729 | |||
730 | fat_ok_for_reading: |
||
731 | ; call reserve_hd1 |
||
732 | |||
733 | pushad |
||
734 | |||
735 | mov ebx,edx |
||
736 | call get_cluster_of_a_path |
||
737 | jc file_to_read_not_found |
||
738 | |||
739 | test edi,edi ; read rootdir |
||
740 | jne no_read_root |
||
741 | |||
742 | xor eax,eax |
||
743 | call get_dir_size ; return rootdir size |
||
74 | mario79 | 744 | cmp [hd_error],0 |
745 | jne file_access_denied |
||
746 | |||
1 | ha | 747 | mov [file_size],eax |
748 | mov eax,[ROOT_CLUSTER] |
||
749 | jmp file_read_start |
||
750 | |||
751 | no_read_root: |
||
752 | mov ebx,PUSHAD_EAX ; file name |
||
753 | call analyze_directory |
||
754 | jc file_to_read_not_found |
||
755 | |||
756 | mov eax,[ebx+28] ; file size |
||
757 | test byte [ebx+11],0x10 ; is it directory? |
||
758 | jz read_set_size ; no |
||
759 | |||
760 | mov eax,[ebx+20-2] ; FAT entry |
||
761 | mov ax,[ebx+26] |
||
762 | and eax,[fatMASK] |
||
763 | call get_dir_size |
||
74 | mario79 | 764 | cmp [hd_error],0 |
765 | jne file_access_denied |
||
1 | ha | 766 | |
767 | read_set_size: |
||
768 | mov [file_size],eax |
||
769 | |||
770 | mov eax,[ebx+20-2] ; FAT entry |
||
771 | mov ax,[ebx+26] |
||
772 | and eax,[fatMASK] |
||
773 | |||
774 | file_read_start: |
||
775 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
776 | mov edx,PUSHAD_EBX ; file blocks to read |
||
777 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
778 | |||
779 | file_read_new_cluster: |
||
780 | call get_data_cluster |
||
781 | jc file_read_eof ; end of file or cluster out of range |
||
782 | |||
783 | test edx,edx ; is all read? |
||
784 | je file_read_OK ; yes |
||
785 | |||
786 | call get_FAT ; get next cluster |
||
74 | mario79 | 787 | cmp [hd_error],0 |
788 | jne file_access_denied |
||
789 | |||
1 | ha | 790 | cmp eax,[fatRESERVED] ; end of file |
791 | jnb file_read_eof |
||
792 | cmp eax,2 ; incorrect fat chain |
||
793 | jnb file_read_new_cluster |
||
794 | |||
795 | popad |
||
796 | mov [hd1_status],0 |
||
797 | mov ebx,[file_size] |
||
798 | mov eax,ERROR_FAT_TABLE |
||
799 | ret |
||
800 | |||
801 | file_read_eof: |
||
74 | mario79 | 802 | cmp [hd_error],0 |
803 | jne file_access_denied |
||
1 | ha | 804 | popad |
805 | mov [hd1_status],0 |
||
806 | mov ebx,[file_size] |
||
807 | mov eax,ERROR_END_OF_FILE |
||
808 | ret |
||
809 | |||
810 | file_read_OK: |
||
811 | popad |
||
812 | mov [hd1_status],0 |
||
813 | mov ebx,[file_size] |
||
814 | xor eax,eax |
||
815 | ret |
||
816 | |||
817 | file_to_read_not_found: |
||
74 | mario79 | 818 | cmp [hd_error],0 |
819 | jne file_access_denied |
||
1 | ha | 820 | popad |
821 | mov [hd1_status],0 |
||
822 | xor ebx,ebx |
||
823 | mov eax,ERROR_FILE_NOT_FOUND |
||
824 | ret |
||
825 | |||
74 | mario79 | 826 | file_access_denied: |
827 | popad |
||
828 | mov [hd1_status],0 |
||
829 | xor ebx,ebx |
||
830 | mov eax,ERROR_ACCESS_DENIED |
||
831 | ret |
||
1 | ha | 832 | |
833 | get_dir_size: |
||
834 | ;----------------------------------------------------- |
||
835 | ; input : eax = first cluster (0=rootdir) |
||
836 | ; output : eax = directory size in bytes |
||
837 | ;----------------------------------------------------- |
||
838 | push edx |
||
839 | xor edx,edx ; count of directory clusters |
||
840 | test eax,eax |
||
841 | jnz dir_size_next |
||
842 | |||
843 | mov eax,[ROOT_SECTORS] |
||
844 | shl eax,9 ; fat16 rootdir size in bytes |
||
256 | diamond | 845 | cmp [fs_type],16 |
1 | ha | 846 | je dir_size_ret |
847 | mov eax,[ROOT_CLUSTER] |
||
848 | |||
849 | dir_size_next: |
||
850 | cmp eax,2 ; incorrect fat chain |
||
851 | jb dir_size_end |
||
852 | cmp eax,[fatRESERVED] ; end of directory |
||
853 | ja dir_size_end |
||
854 | call get_FAT ; get next cluster |
||
74 | mario79 | 855 | cmp [hd_error],0 |
856 | jne dir_size_ret |
||
857 | |||
1 | ha | 858 | inc edx |
859 | jmp dir_size_next |
||
860 | |||
861 | dir_size_end: |
||
862 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
863 | imul eax,edx |
||
864 | |||
865 | dir_size_ret: |
||
866 | pop edx |
||
867 | ret |
||
868 | |||
869 | |||
870 | clear_cluster_chain: |
||
871 | ;----------------------------------------------------- |
||
872 | ; input : eax = first cluster |
||
873 | ;----------------------------------------------------- |
||
874 | push eax ecx edx |
||
875 | xor ecx,ecx ; cluster count |
||
876 | |||
877 | clean_new_chain: |
||
878 | cmp eax,[LAST_CLUSTER] ; end of file |
||
879 | ja delete_OK |
||
880 | cmp eax,2 ; unfinished fat chain or zero length file |
||
881 | jb delete_OK |
||
882 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
883 | jz delete_OK |
||
884 | |||
885 | xor edx,edx |
||
886 | call set_FAT ; clear fat entry |
||
74 | mario79 | 887 | cmp [hd_error],0 |
888 | jne access_denied_01 |
||
889 | |||
1 | ha | 890 | inc ecx ; update cluster count |
891 | mov eax,edx ; old cluster |
||
892 | jmp clean_new_chain |
||
893 | |||
894 | delete_OK: |
||
895 | call add_disk_free_space ; add clusters to free disk space |
||
74 | mario79 | 896 | access_denied_01: |
1 | ha | 897 | pop edx ecx eax |
898 | ret |
||
899 | |||
900 | |||
901 | get_hd_info: |
||
902 | ;----------------------------------------------------------- |
||
903 | ; output : eax = 0 - ok |
||
904 | ; 3 - unknown FS |
||
74 | mario79 | 905 | ; 10 - access denied |
1 | ha | 906 | ; edx = cluster size in bytes |
907 | ; ebx = total clusters on disk |
||
908 | ; ecx = free clusters on disk |
||
909 | ;----------------------------------------------------------- |
||
256 | diamond | 910 | cmp [fs_type], 16 |
911 | jz info_fat_ok |
||
912 | cmp [fs_type], 32 |
||
913 | jz info_fat_ok |
||
1 | ha | 914 | xor edx,edx |
915 | xor ebx,ebx |
||
916 | xor ecx,ecx |
||
917 | mov eax,ERROR_UNKNOWN_FS |
||
918 | ret |
||
919 | |||
920 | info_fat_ok: |
||
921 | ; call reserve_hd1 |
||
922 | |||
923 | xor ecx,ecx ; count of free clusters |
||
924 | mov eax,2 |
||
925 | mov ebx,[LAST_CLUSTER] |
||
926 | |||
927 | info_cluster: |
||
928 | push eax |
||
929 | call get_FAT ; get cluster info |
||
74 | mario79 | 930 | cmp [hd_error],0 |
931 | jne info_access_denied |
||
932 | |||
1 | ha | 933 | test eax,eax ; is it free? |
934 | jnz info_used ; no |
||
935 | inc ecx |
||
936 | |||
937 | info_used: |
||
938 | pop eax |
||
939 | inc eax |
||
940 | cmp eax,ebx ; is above last cluster? |
||
941 | jbe info_cluster ; no. test next cluster |
||
942 | |||
943 | dec ebx ; cluster count |
||
944 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
945 | mov [hd1_status],0 |
||
946 | xor eax,eax |
||
947 | ret |
||
948 | |||
74 | mario79 | 949 | info_access_denied: |
379 | serge | 950 | add esp,4 |
74 | mario79 | 951 | xor edx,edx |
952 | xor ebx,ebx |
||
953 | xor ecx,ecx |
||
954 | mov eax,ERROR_ACCESS_DENIED |
||
955 | ret |
||
1 | ha | 956 | |
957 | update_disk: |
||
958 | ;----------------------------------------------------------- |
||
959 | ; write changed fat and cache to disk |
||
960 | ;----------------------------------------------------------- |
||
961 | cmp [fat_change],0 ; is fat changed? |
||
962 | je upd_no_change |
||
963 | |||
964 | call write_fat_sector |
||
74 | mario79 | 965 | cmp [hd_error],0 |
966 | jne update_disk_acces_denied |
||
1 | ha | 967 | |
968 | upd_no_change: |
||
969 | |||
970 | call write_cache |
||
74 | mario79 | 971 | update_disk_acces_denied: |
1 | ha | 972 | ret |
973 | |||
974 | |||
71 | diamond | 975 | ; \begin{diamond} |
976 | hd_find_lfn: |
||
521 | diamond | 977 | ; in: esi+ebp -> name |
71 | diamond | 978 | ; out: CF=1 - file not found |
86 | diamond | 979 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 980 | ; destroys eax |
981 | push esi edi |
||
982 | push 0 |
||
983 | push 0 |
||
984 | push fat16_root_first |
||
985 | push fat16_root_next |
||
986 | mov eax, [ROOT_CLUSTER] |
||
256 | diamond | 987 | cmp [fs_type], 32 |
83 | diamond | 988 | jz .fat32 |
989 | .loop: |
||
990 | call fat_find_lfn |
||
991 | jc .notfound |
||
992 | cmp byte [esi], 0 |
||
993 | jz .found |
||
521 | diamond | 994 | .continue: |
83 | diamond | 995 | test byte [edi+11], 10h |
996 | jz .notfound |
||
997 | and dword [esp+12], 0 |
||
88 | diamond | 998 | mov eax, [edi+20-2] |
999 | mov ax, [edi+26] ; cluster |
||
83 | diamond | 1000 | .fat32: |
1001 | mov [esp+8], eax |
||
1002 | mov dword [esp+4], fat_notroot_first |
||
1003 | mov dword [esp], fat_notroot_next |
||
1004 | jmp .loop |
||
71 | diamond | 1005 | .notfound: |
83 | diamond | 1006 | add esp, 16 |
1007 | pop edi esi |
||
1008 | stc |
||
1009 | ret |
||
71 | diamond | 1010 | .found: |
521 | diamond | 1011 | test ebp, ebp |
1012 | jz @f |
||
1013 | mov esi, ebp |
||
1014 | xor ebp, ebp |
||
1015 | jmp .continue |
||
1016 | @@: |
||
86 | diamond | 1017 | lea eax, [esp+8] |
1018 | cmp dword [eax], 0 |
||
1019 | jz .root |
||
1020 | call fat_get_sector |
||
1021 | jmp .cmn |
||
1022 | .root: |
||
1023 | mov eax, [eax+4] |
||
1024 | add eax, [ROOT_START] |
||
1025 | .cmn: |
||
83 | diamond | 1026 | add esp, 20 ; CF=0 |
1027 | pop esi |
||
1028 | ret |
||
74 | mario79 | 1029 | |
71 | diamond | 1030 | ;---------------------------------------------------------------- |
1031 | ; |
||
1032 | ; fs_HdRead - LFN variant for reading hard disk |
||
1033 | ; |
||
1034 | ; esi points to filename |
||
1035 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1036 | ; may be ebx=0 - start from first byte |
||
1037 | ; ecx number of bytes to read, 0+ |
||
1038 | ; edx mem location to return data |
||
1039 | ; |
||
77 | diamond | 1040 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 1041 | ; eax = 0 ok read or other = errormsg |
1042 | ; |
||
1043 | ;-------------------------------------------------------------- |
||
1044 | fs_HdRead: |
||
256 | diamond | 1045 | cmp [fs_type], 16 |
1046 | jz @f |
||
1047 | cmp [fs_type], 32 |
||
1048 | jz @f |
||
1049 | cmp [fs_type], 1 |
||
1050 | jz ntfs_HdRead |
||
1051 | or ebx, -1 |
||
1052 | mov eax, ERROR_UNKNOWN_FS |
||
1053 | ret |
||
71 | diamond | 1054 | @@: |
74 | mario79 | 1055 | push edi |
1056 | cmp byte [esi], 0 |
||
1057 | jnz @f |
||
71 | diamond | 1058 | .noaccess: |
74 | mario79 | 1059 | pop edi |
1060 | .noaccess_2: |
||
1061 | or ebx, -1 |
||
1062 | mov eax, ERROR_ACCESS_DENIED |
||
1063 | ret |
||
379 | serge | 1064 | |
71 | diamond | 1065 | @@: |
74 | mario79 | 1066 | call hd_find_lfn |
1067 | jnc .found |
||
1068 | pop edi |
||
1069 | cmp [hd_error],0 |
||
1070 | jne .noaccess_2 |
||
1071 | or ebx, -1 |
||
1072 | mov eax, ERROR_FILE_NOT_FOUND |
||
1073 | ret |
||
1074 | |||
71 | diamond | 1075 | .found: |
74 | mario79 | 1076 | test byte [edi+11], 0x10 ; do not allow read directories |
1077 | jnz .noaccess |
||
1078 | test ebx, ebx |
||
1079 | jz .l1 |
||
1080 | cmp dword [ebx+4], 0 |
||
1081 | jz @f |
||
77 | diamond | 1082 | xor ebx, ebx |
71 | diamond | 1083 | .reteof: |
74 | mario79 | 1084 | mov eax, 6 |
1085 | pop edi |
||
1086 | ret |
||
71 | diamond | 1087 | @@: |
74 | mario79 | 1088 | mov ebx, [ebx] |
71 | diamond | 1089 | .l1: |
77 | diamond | 1090 | push ecx edx |
1091 | push 0 |
||
1092 | mov eax, [edi+28] |
||
1093 | sub eax, ebx |
||
1094 | jb .eof |
||
1095 | cmp eax, ecx |
||
1096 | jae @f |
||
1097 | mov ecx, eax |
||
1098 | mov byte [esp], 6 |
||
1099 | @@: |
||
74 | mario79 | 1100 | mov eax, [edi+20-2] |
1101 | mov ax, [edi+26] |
||
71 | diamond | 1102 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1103 | .new_cluster: |
||
74 | mario79 | 1104 | jecxz .new_sector |
1105 | test eax, eax |
||
1106 | jz .eof |
||
1107 | cmp eax, [fatRESERVED] |
||
1108 | jae .eof |
||
1109 | mov [cluster_tmp], eax |
||
1110 | dec eax |
||
1111 | dec eax |
||
1112 | mov edi, [SECTORS_PER_CLUSTER] |
||
1113 | imul eax, edi |
||
1114 | add eax, [DATA_START] |
||
71 | diamond | 1115 | .new_sector: |
74 | mario79 | 1116 | test ecx, ecx |
1117 | jz .done |
||
1118 | sub ebx, 512 |
||
1119 | jae .skip |
||
1120 | add ebx, 512 |
||
1121 | jnz .force_buf |
||
1122 | cmp ecx, 512 |
||
1123 | jb .force_buf |
||
71 | diamond | 1124 | ; we may read directly to given buffer |
74 | mario79 | 1125 | push ebx |
1126 | mov ebx, edx |
||
1127 | call hd_read |
||
1124 | diamond | 1128 | pop ebx |
74 | mario79 | 1129 | cmp [hd_error],0 |
379 | serge | 1130 | jne .noaccess_1 |
74 | mario79 | 1131 | add edx, 512 |
1132 | sub ecx, 512 |
||
1133 | jmp .skip |
||
71 | diamond | 1134 | .force_buf: |
1135 | ; we must read sector to temporary buffer and then copy it to destination |
||
74 | mario79 | 1136 | push eax ebx |
1137 | mov ebx, buffer |
||
1138 | call hd_read |
||
1124 | diamond | 1139 | mov eax, ebx |
1140 | pop ebx |
||
74 | mario79 | 1141 | cmp [hd_error],0 |
1142 | jne .noaccess_3 |
||
1143 | add eax, ebx |
||
1144 | push ecx |
||
1145 | add ecx, ebx |
||
1146 | cmp ecx, 512 |
||
1147 | jbe @f |
||
1148 | mov ecx, 512 |
||
71 | diamond | 1149 | @@: |
74 | mario79 | 1150 | sub ecx, ebx |
1151 | mov ebx, edx |
||
1152 | call memmove |
||
1153 | add edx, ecx |
||
1154 | sub [esp], ecx |
||
1155 | pop ecx |
||
1156 | pop eax |
||
1157 | xor ebx, ebx |
||
71 | diamond | 1158 | .skip: |
74 | mario79 | 1159 | inc eax |
1160 | dec edi |
||
1161 | jnz .new_sector |
||
1162 | mov eax, [cluster_tmp] |
||
1163 | call get_FAT |
||
1164 | cmp [hd_error],0 |
||
1124 | diamond | 1165 | jne .noaccess_1 |
74 | mario79 | 1166 | |
1167 | jmp .new_cluster |
||
1124 | diamond | 1168 | .noaccess_3: |
1169 | pop eax |
||
1170 | .noaccess_1: |
||
1171 | pop eax |
||
1172 | push 11 |
||
71 | diamond | 1173 | .done: |
77 | diamond | 1174 | mov ebx, edx |
1175 | pop eax edx ecx edi |
||
1176 | sub ebx, edx |
||
1177 | ret |
||
71 | diamond | 1178 | .eof: |
77 | diamond | 1179 | mov ebx, edx |
1180 | pop eax edx ecx |
||
1181 | sub ebx, edx |
||
1182 | jmp .reteof |
||
75 | diamond | 1183 | |
1184 | ;---------------------------------------------------------------- |
||
1185 | ; |
||
1186 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
1187 | ; |
||
1188 | ; esi points to filename |
||
78 | diamond | 1189 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
1190 | ; & flags (bitfields) |
||
1191 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 1192 | ; ecx number of blocks to read, 0+ |
1193 | ; edx mem location to return data |
||
1194 | ; |
||
77 | diamond | 1195 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 1196 | ; eax = 0 ok read or other = errormsg |
1197 | ; |
||
1198 | ;-------------------------------------------------------------- |
||
1199 | fs_HdReadFolder: |
||
256 | diamond | 1200 | cmp [fs_type], 1 |
1201 | jz ntfs_HdReadFolder |
||
1202 | cmp [fs_type], 16 |
||
1203 | jz @f |
||
1204 | cmp [fs_type], 32 |
||
1205 | jz @f |
||
1206 | push ERROR_UNSUPPORTED_FS |
||
1207 | pop eax |
||
1208 | or ebx, -1 |
||
1209 | ret |
||
1210 | @@: |
||
75 | diamond | 1211 | mov eax, [ROOT_CLUSTER] |
1212 | push edi |
||
1213 | cmp byte [esi], 0 |
||
1214 | jz .doit |
||
1215 | call hd_find_lfn |
||
1216 | jnc .found |
||
1217 | pop edi |
||
1218 | or ebx, -1 |
||
1219 | mov eax, ERROR_FILE_NOT_FOUND |
||
1220 | ret |
||
1221 | .found: |
||
1222 | test byte [edi+11], 0x10 ; do not allow read files |
||
1223 | jnz .found_dir |
||
1224 | pop edi |
||
1225 | or ebx, -1 |
||
1226 | mov eax, ERROR_ACCESS_DENIED |
||
1227 | ret |
||
1228 | .found_dir: |
||
1229 | mov eax, [edi+20-2] |
||
1230 | mov ax, [edi+26] ; eax=cluster |
||
1231 | .doit: |
||
1232 | push esi ecx |
||
1233 | push ebp |
||
1234 | sub esp, 262*2 ; reserve space for LFN |
||
1235 | mov ebp, esp |
||
78 | diamond | 1236 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1237 | mov ebx, [ebx] |
||
75 | diamond | 1238 | ; init header |
1239 | push eax ecx |
||
1240 | mov edi, edx |
||
1241 | mov ecx, 32/4 |
||
1242 | xor eax, eax |
||
1243 | rep stosd |
||
1244 | pop ecx eax |
||
1245 | mov byte [edx], 1 ; version |
||
1246 | mov esi, edi ; esi points to BDFE |
||
1247 | .new_cluster: |
||
1248 | mov [cluster_tmp], eax |
||
1249 | test eax, eax |
||
1250 | jnz @f |
||
256 | diamond | 1251 | cmp [fs_type], 32 |
75 | diamond | 1252 | jz .notfound |
1253 | mov eax, [ROOT_START] |
||
1254 | push [ROOT_SECTORS] |
||
1255 | push ebx |
||
1256 | jmp .new_sector |
||
1257 | @@: |
||
1258 | dec eax |
||
1259 | dec eax |
||
1260 | imul eax, [SECTORS_PER_CLUSTER] |
||
1261 | push [SECTORS_PER_CLUSTER] |
||
1262 | add eax, [DATA_START] |
||
1263 | push ebx |
||
1264 | .new_sector: |
||
1265 | mov ebx, buffer |
||
1266 | mov edi, ebx |
||
1267 | call hd_read |
||
1268 | cmp [hd_error], 0 |
||
1269 | jnz .notfound2 |
||
1270 | add ebx, 512 |
||
1271 | push eax |
||
1272 | .l1: |
||
1273 | call fat_get_name |
||
1274 | jc .l2 |
||
1275 | cmp byte [edi+11], 0xF |
||
1276 | jnz .do_bdfe |
||
1277 | add edi, 0x20 |
||
1278 | cmp edi, ebx |
||
1279 | jb .do_bdfe |
||
1280 | pop eax |
||
1281 | inc eax |
||
1282 | dec dword [esp+4] |
||
1283 | jnz @f |
||
1284 | mov eax, [cluster_tmp] |
||
1285 | test eax, eax |
||
1286 | jz .done |
||
1287 | call get_FAT |
||
1288 | cmp [hd_error], 0 |
||
1289 | jnz .notfound2 |
||
1290 | cmp eax, 2 |
||
1291 | jb .done |
||
1292 | cmp eax, [fatRESERVED] |
||
1293 | jae .done |
||
1294 | push eax |
||
1295 | mov eax, [SECTORS_PER_CLUSTER] |
||
1296 | mov [esp+8], eax |
||
1297 | pop eax |
||
1298 | mov [cluster_tmp], eax |
||
1299 | dec eax |
||
1300 | dec eax |
||
1301 | imul eax, [SECTORS_PER_CLUSTER] |
||
1302 | add eax, [DATA_START] |
||
1303 | @@: |
||
1304 | mov ebx, buffer |
||
1305 | mov edi, ebx |
||
1306 | call hd_read |
||
1307 | cmp [hd_error], 0 |
||
1308 | jnz .notfound2 |
||
1309 | add ebx, 512 |
||
1310 | push eax |
||
1311 | .do_bdfe: |
||
1312 | inc dword [edx+8] ; new file found |
||
1313 | dec dword [esp+4] |
||
1314 | jns .l2 |
||
1315 | dec ecx |
||
1316 | js .l2 |
||
1317 | inc dword [edx+4] ; new file block copied |
||
1318 | call fat_entry_to_bdfe |
||
1319 | .l2: |
||
1320 | add edi, 0x20 |
||
1321 | cmp edi, ebx |
||
1322 | jb .l1 |
||
1323 | pop eax |
||
1324 | inc eax |
||
1325 | dec dword [esp+4] |
||
1326 | jnz .new_sector |
||
1327 | mov eax, [cluster_tmp] |
||
1328 | test eax, eax |
||
1329 | jz .done |
||
1330 | call get_FAT |
||
1331 | cmp [hd_error], 0 |
||
1332 | jnz .notfound2 |
||
1333 | cmp eax, 2 |
||
1334 | jb .done |
||
1335 | cmp eax, [fatRESERVED] |
||
1336 | jae .done |
||
1337 | push eax |
||
1338 | mov eax, [SECTORS_PER_CLUSTER] |
||
1339 | mov [esp+8], eax |
||
1340 | pop eax |
||
1341 | pop ebx |
||
1342 | add esp, 4 |
||
1343 | jmp .new_cluster |
||
1344 | .notfound2: |
||
1345 | add esp, 8 |
||
1346 | .notfound: |
||
1347 | add esp, 262*2+4 |
||
1348 | pop ebp ecx esi edi |
||
1349 | mov eax, ERROR_FILE_NOT_FOUND |
||
1350 | or ebx, -1 |
||
1351 | ret |
||
1352 | .done: |
||
1353 | add esp, 262*2+4+8 |
||
1354 | pop ebp |
||
77 | diamond | 1355 | mov ebx, [edx+4] |
75 | diamond | 1356 | xor eax, eax |
1357 | dec ecx |
||
1358 | js @f |
||
1359 | mov al, ERROR_END_OF_FILE |
||
1360 | @@: |
||
1361 | pop ecx esi edi |
||
1362 | ret |
||
1363 | |||
83 | diamond | 1364 | fat16_root_next: |
1365 | cmp edi, buffer+0x200-0x20 |
||
1366 | jae fat16_root_next_sector |
||
1367 | add edi, 0x20 |
||
1368 | ret ; CF=0 |
||
1369 | fat16_root_next_sector: |
||
1370 | ; read next sector |
||
171 | diamond | 1371 | push [longname_sec2] |
1372 | pop [longname_sec1] |
||
83 | diamond | 1373 | push ecx |
1374 | mov ecx, [eax+4] |
||
171 | diamond | 1375 | push ecx |
1376 | add ecx, [ROOT_START] |
||
1377 | mov [longname_sec2], ecx |
||
1378 | pop ecx |
||
83 | diamond | 1379 | inc ecx |
1380 | mov [eax+4], ecx |
||
1381 | cmp ecx, [ROOT_SECTORS] |
||
1382 | pop ecx |
||
1383 | jae fat16_root_first.readerr |
||
1384 | fat16_root_first: |
||
1385 | mov eax, [eax+4] |
||
1386 | add eax, [ROOT_START] |
||
1387 | push ebx |
||
1388 | mov edi, buffer |
||
1389 | mov ebx, edi |
||
1390 | call hd_read |
||
1391 | pop ebx |
||
1392 | cmp [hd_error], 0 |
||
1393 | jnz .readerr |
||
1394 | ret ; CF=0 |
||
1395 | .readerr: |
||
1396 | stc |
||
1397 | ret |
||
1398 | fat16_root_begin_write: |
||
1399 | push edi eax |
||
1400 | call fat16_root_first |
||
1401 | pop eax edi |
||
1402 | ret |
||
1403 | fat16_root_end_write: |
||
1404 | pusha |
||
1405 | mov eax, [eax+4] |
||
1406 | add eax, [ROOT_START] |
||
1407 | mov ebx, buffer |
||
1408 | call hd_write |
||
1409 | popa |
||
1410 | ret |
||
1411 | fat16_root_next_write: |
||
1412 | cmp edi, buffer+0x200 |
||
1413 | jae @f |
||
1414 | ret |
||
1415 | @@: |
||
1416 | call fat16_root_end_write |
||
1417 | jmp fat16_root_next_sector |
||
1418 | fat16_root_extend_dir: |
||
1419 | stc |
||
1420 | ret |
||
1421 | |||
1422 | fat_notroot_next: |
||
1423 | cmp edi, buffer+0x200-0x20 |
||
1424 | jae fat_notroot_next_sector |
||
1425 | add edi, 0x20 |
||
1426 | ret ; CF=0 |
||
1427 | fat_notroot_next_sector: |
||
171 | diamond | 1428 | push [longname_sec2] |
1429 | pop [longname_sec1] |
||
1430 | push eax |
||
1431 | call fat_get_sector |
||
1432 | mov [longname_sec2], eax |
||
1433 | pop eax |
||
83 | diamond | 1434 | push ecx |
1435 | mov ecx, [eax+4] |
||
1436 | inc ecx |
||
1437 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
1438 | jae fat_notroot_next_cluster |
||
1439 | mov [eax+4], ecx |
||
1440 | jmp @f |
||
1441 | fat_notroot_next_cluster: |
||
1442 | push eax |
||
1443 | mov eax, [eax] |
||
1444 | call get_FAT |
||
1445 | mov ecx, eax |
||
1446 | pop eax |
||
1447 | cmp [hd_error], 0 |
||
1448 | jnz fat_notroot_next_err |
||
1449 | cmp ecx, [fatRESERVED] |
||
1450 | jae fat_notroot_next_err |
||
1451 | mov [eax], ecx |
||
1452 | and dword [eax+4], 0 |
||
1453 | @@: |
||
1454 | pop ecx |
||
1455 | fat_notroot_first: |
||
1456 | call fat_get_sector |
||
1457 | push ebx |
||
1458 | mov edi, buffer |
||
1459 | mov ebx, edi |
||
1460 | call hd_read |
||
1461 | pop ebx |
||
1462 | cmp [hd_error], 0 |
||
1463 | jnz @f |
||
1464 | ret ; CF=0 |
||
1465 | fat_notroot_next_err: |
||
1466 | pop ecx |
||
1467 | @@: |
||
1468 | stc |
||
1469 | ret |
||
1470 | fat_notroot_begin_write: |
||
1471 | push eax edi |
||
1472 | call fat_notroot_first |
||
1473 | pop edi eax |
||
1474 | ret |
||
1475 | fat_notroot_end_write: |
||
1476 | call fat_get_sector |
||
1477 | push ebx |
||
1478 | mov ebx, buffer |
||
1479 | call hd_write |
||
1480 | pop ebx |
||
1481 | ret |
||
1482 | fat_notroot_next_write: |
||
1483 | cmp edi, buffer+0x200 |
||
1484 | jae @f |
||
1485 | ret |
||
1486 | @@: |
||
1487 | push eax |
||
1488 | call fat_notroot_end_write |
||
1489 | pop eax |
||
1490 | jmp fat_notroot_next_sector |
||
1491 | fat_notroot_extend_dir: |
||
1492 | push eax |
||
1493 | call get_free_FAT |
||
1494 | jnc .found |
||
1495 | pop eax |
||
1496 | ret ; CF=1 |
||
1497 | .found: |
||
1498 | push edx |
||
1499 | mov edx, [fatEND] |
||
1500 | call set_FAT |
||
1501 | mov edx, eax |
||
1502 | mov eax, [esp+4] |
||
1503 | mov eax, [eax] |
||
1504 | push edx |
||
1505 | call set_FAT |
||
1506 | pop edx |
||
1507 | cmp [hd_error], 0 |
||
1508 | jz @f |
||
1509 | pop edx |
||
1510 | pop eax |
||
1511 | stc |
||
1512 | ret |
||
1513 | @@: |
||
1514 | push ecx |
||
1515 | or ecx, -1 |
||
1516 | call add_disk_free_space |
||
1517 | ; zero new cluster |
||
1518 | mov ecx, 512/4 |
||
1519 | mov edi, buffer |
||
1520 | push edi |
||
1521 | xor eax, eax |
||
1522 | rep stosd |
||
1523 | pop edi |
||
1524 | pop ecx |
||
1525 | mov eax, [esp+4] |
||
1526 | mov [eax], edx |
||
1527 | and dword [eax+4], 0 |
||
1528 | pop edx |
||
1529 | mov eax, [eax] |
||
1530 | dec eax |
||
1531 | dec eax |
||
1532 | push ebx ecx |
||
1533 | mov ecx, [SECTORS_PER_CLUSTER] |
||
1534 | imul eax, ecx |
||
1535 | add eax, [DATA_START] |
||
1536 | mov ebx, edi |
||
1537 | @@: |
||
1538 | call hd_write |
||
1539 | inc eax |
||
1540 | loop @b |
||
1541 | pop ecx ebx eax |
||
1542 | clc |
||
1543 | ret |
||
1544 | |||
1545 | fat_get_sector: |
||
1546 | push ecx |
||
1547 | mov ecx, [eax] |
||
1548 | dec ecx |
||
1549 | dec ecx |
||
1550 | imul ecx, [SECTORS_PER_CLUSTER] |
||
1551 | add ecx, [DATA_START] |
||
1552 | add ecx, [eax+4] |
||
1553 | mov eax, ecx |
||
1554 | pop ecx |
||
1555 | ret |
||
1556 | |||
1557 | ;---------------------------------------------------------------- |
||
1558 | ; |
||
1559 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
1560 | ; |
||
1561 | ; esi points to filename |
||
1562 | ; ebx ignored (reserved) |
||
1563 | ; ecx number of bytes to write, 0+ |
||
1564 | ; edx mem location to data |
||
1565 | ; |
||
1566 | ; ret ebx = number of written bytes |
||
1567 | ; eax = 0 ok read or other = errormsg |
||
1568 | ; |
||
1569 | ;-------------------------------------------------------------- |
||
1570 | fshrad: |
||
1571 | mov eax, ERROR_ACCESS_DENIED |
||
1572 | xor ebx, ebx |
||
1573 | ret |
||
1574 | fshrfs: |
||
1575 | mov eax, ERROR_UNKNOWN_FS |
||
1576 | xor ebx, ebx |
||
1577 | ret |
||
1578 | |||
321 | diamond | 1579 | fs_HdCreateFolder: |
1580 | mov al, 1 |
||
1581 | jmp fs_HdRewrite.common |
||
1582 | |||
83 | diamond | 1583 | fs_HdRewrite: |
321 | diamond | 1584 | xor eax, eax |
1585 | .common: |
||
256 | diamond | 1586 | cmp [fs_type], 1 |
1587 | jz ntfs_HdRewrite |
||
1588 | cmp [fs_type], 16 |
||
1589 | jz @f |
||
1590 | cmp [fs_type], 32 |
||
1591 | jnz fshrfs |
||
1592 | @@: |
||
83 | diamond | 1593 | cmp byte [esi], 0 |
1594 | jz fshrad |
||
1595 | pushad |
||
521 | diamond | 1596 | xor edi, edi |
83 | diamond | 1597 | push esi |
521 | diamond | 1598 | test ebp, ebp |
1599 | jz @f |
||
1600 | mov esi, ebp |
||
83 | diamond | 1601 | @@: |
1602 | lodsb |
||
1603 | test al, al |
||
1604 | jz @f |
||
1605 | cmp al, '/' |
||
1606 | jnz @b |
||
521 | diamond | 1607 | lea edi, [esi-1] |
83 | diamond | 1608 | jmp @b |
1609 | @@: |
||
1610 | pop esi |
||
521 | diamond | 1611 | test edi, edi |
1612 | jnz .noroot |
||
83 | diamond | 1613 | test ebp, ebp |
521 | diamond | 1614 | jnz .hasebp |
83 | diamond | 1615 | mov ebp, [ROOT_CLUSTER] |
256 | diamond | 1616 | cmp [fs_type], 32 |
83 | diamond | 1617 | jz .pushnotroot |
1618 | push fat16_root_extend_dir |
||
1619 | push fat16_root_end_write |
||
1620 | push fat16_root_next_write |
||
1621 | push fat16_root_begin_write |
||
1622 | xor ebp, ebp |
||
1623 | push ebp |
||
1624 | push ebp |
||
1625 | push fat16_root_first |
||
1626 | push fat16_root_next |
||
1627 | jmp .common1 |
||
521 | diamond | 1628 | .hasebp: |
1629 | mov eax, ERROR_ACCESS_DENIED |
||
1630 | cmp byte [ebp], 0 |
||
1631 | jz .ret1 |
||
1632 | push ebp |
||
1633 | xor ebp, ebp |
||
1634 | call hd_find_lfn |
||
1635 | pop esi |
||
1636 | jc .notfound0 |
||
1637 | jmp .common0 |
||
83 | diamond | 1638 | .noroot: |
335 | diamond | 1639 | mov eax, ERROR_ACCESS_DENIED |
521 | diamond | 1640 | cmp byte [edi+1], 0 |
335 | diamond | 1641 | jz .ret1 |
83 | diamond | 1642 | ; check existence |
521 | diamond | 1643 | mov byte [edi], 0 |
1644 | push edi |
||
83 | diamond | 1645 | call hd_find_lfn |
521 | diamond | 1646 | pop esi |
1647 | mov byte [esi], '/' |
||
83 | diamond | 1648 | jnc @f |
521 | diamond | 1649 | .notfound0: |
83 | diamond | 1650 | mov eax, ERROR_FILE_NOT_FOUND |
1651 | .ret1: |
||
1652 | mov [esp+28], eax |
||
1653 | popad |
||
1654 | xor ebx, ebx |
||
1655 | ret |
||
1656 | @@: |
||
521 | diamond | 1657 | inc esi |
1658 | .common0: |
||
83 | diamond | 1659 | test byte [edi+11], 0x10 ; must be directory |
1660 | mov eax, ERROR_ACCESS_DENIED |
||
1661 | jz .ret1 |
||
1662 | mov ebp, [edi+20-2] |
||
1663 | mov bp, [edi+26] ; ebp=cluster |
||
1664 | mov eax, ERROR_FAT_TABLE |
||
1665 | cmp ebp, 2 |
||
1666 | jb .ret1 |
||
1667 | .pushnotroot: |
||
1668 | push fat_notroot_extend_dir |
||
1669 | push fat_notroot_end_write |
||
1670 | push fat_notroot_next_write |
||
1671 | push fat_notroot_begin_write |
||
1672 | push 0 |
||
1673 | push ebp |
||
1674 | push fat_notroot_first |
||
1675 | push fat_notroot_next |
||
1676 | .common1: |
||
1677 | call fat_find_lfn |
||
1678 | jc .notfound |
||
321 | diamond | 1679 | ; found |
91 | diamond | 1680 | test byte [edi+11], 10h |
321 | diamond | 1681 | jz .exists_file |
1682 | ; found directory; if we are creating directory, return OK, |
||
1683 | ; if we are creating file, say "access denied" |
||
1684 | add esp, 32 |
||
1685 | popad |
||
1686 | test al, al |
||
1687 | mov eax, ERROR_ACCESS_DENIED |
||
91 | diamond | 1688 | jz @f |
321 | diamond | 1689 | mov al, 0 |
1690 | @@: |
||
1691 | xor ebx, ebx |
||
1692 | ret |
||
1693 | .exists_file: |
||
1694 | ; found file; if we are creating directory, return "access denied", |
||
1695 | ; if we are creating file, delete existing file and continue |
||
1696 | cmp byte [esp+32+28], 0 |
||
1697 | jz @f |
||
91 | diamond | 1698 | add esp, 32 |
1699 | popad |
||
1700 | mov eax, ERROR_ACCESS_DENIED |
||
1701 | xor ebx, ebx |
||
1702 | ret |
||
1703 | @@: |
||
1704 | ; delete FAT chain |
||
83 | diamond | 1705 | push edi |
1706 | xor eax, eax |
||
1707 | mov dword [edi+28], eax ; zero size |
||
1708 | xor ecx, ecx |
||
1709 | mov eax, [edi+20-2] |
||
1710 | mov ax, [edi+26] |
||
1711 | mov word [edi+20], cx |
||
1712 | mov word [edi+26], cx |
||
1713 | test eax, eax |
||
1714 | jz .done1 |
||
1715 | @@: |
||
1716 | cmp eax, [fatRESERVED] |
||
1717 | jae .done1 |
||
1718 | push edx |
||
1719 | xor edx, edx |
||
1720 | call set_FAT |
||
1721 | mov eax, edx |
||
1722 | pop edx |
||
1723 | inc ecx |
||
1724 | jmp @b |
||
1725 | .done1: |
||
1726 | pop edi |
||
1727 | call get_time_for_file |
||
1728 | mov [edi+22], ax |
||
1729 | call get_date_for_file |
||
1730 | mov [edi+24], ax |
||
1731 | mov [edi+18], ax |
||
1732 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1733 | jmp .doit |
||
1734 | .notfound: |
||
1735 | ; file is not found; generate short name |
||
1736 | call fat_name_is_legal |
||
1737 | jc @f |
||
1738 | add esp, 32 |
||
1739 | popad |
||
1740 | mov eax, ERROR_FILE_NOT_FOUND |
||
1741 | xor ebx, ebx |
||
1742 | ret |
||
1743 | @@: |
||
1744 | sub esp, 12 |
||
1745 | mov edi, esp |
||
1746 | call fat_gen_short_name |
||
1747 | .test_short_name_loop: |
||
1748 | push esi edi ecx |
||
1749 | mov esi, edi |
||
1750 | lea eax, [esp+12+12+8] |
||
1751 | mov [eax], ebp |
||
1752 | and dword [eax+4], 0 |
||
1753 | call dword [eax-4] |
||
1754 | jc .found |
||
1755 | .test_short_name_entry: |
||
1756 | cmp byte [edi+11], 0xF |
||
1757 | jz .test_short_name_cont |
||
1758 | mov ecx, 11 |
||
1759 | push esi edi |
||
1760 | repz cmpsb |
||
1761 | pop edi esi |
||
1762 | jz .short_name_found |
||
1763 | .test_short_name_cont: |
||
1764 | lea eax, [esp+12+12+8] |
||
1765 | call dword [eax-8] |
||
1766 | jnc .test_short_name_entry |
||
1767 | jmp .found |
||
1768 | .short_name_found: |
||
1769 | pop ecx edi esi |
||
1770 | call fat_next_short_name |
||
1771 | jnc .test_short_name_loop |
||
1772 | .disk_full: |
||
1773 | add esp, 12+32 |
||
1774 | popa |
||
1775 | mov eax, ERROR_DISK_FULL |
||
1776 | xor ebx, ebx |
||
1777 | ret |
||
1778 | .found: |
||
1779 | pop ecx edi esi |
||
1780 | ; now find space in directory |
||
1781 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1782 | mov al, '~' |
||
1783 | push ecx edi |
||
1784 | mov ecx, 8 |
||
1785 | repnz scasb |
||
1786 | push 1 |
||
1787 | pop eax ; 1 entry |
||
1788 | jnz .notilde |
||
1789 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1790 | xor eax, eax |
||
1791 | @@: |
||
1792 | cmp byte [esi], 0 |
||
1793 | jz @f |
||
1794 | inc esi |
||
1795 | inc eax |
||
1796 | jmp @b |
||
1797 | @@: |
||
1798 | sub esi, eax |
||
1799 | add eax, 12+13 |
||
1800 | mov ecx, 13 |
||
1801 | push edx |
||
1802 | cdq |
||
1803 | div ecx |
||
1804 | pop edx |
||
1805 | .notilde: |
||
1806 | push -1 |
||
1807 | push -1 |
||
1808 | push -1 |
||
1809 | ; find |
||
1810 | xor ecx, ecx |
||
1811 | push eax |
||
1812 | lea eax, [esp+16+8+12+8] |
||
1813 | mov [eax], ebp |
||
1814 | and dword [eax+4], 0 |
||
1815 | call dword [eax-4] |
||
1816 | pop eax |
||
1817 | jnc .scan_dir |
||
1818 | .fsfrfe3: |
||
1819 | add esp, 12+8+12+32 |
||
1820 | popad |
||
1821 | mov eax, 11 |
||
1822 | xor ebx, ebx |
||
1823 | ret |
||
1824 | .scan_dir: |
||
1825 | cmp byte [edi], 0 |
||
1826 | jz .free |
||
1827 | cmp byte [edi], 0xE5 |
||
1828 | jz .free |
||
1829 | xor ecx, ecx |
||
1830 | .scan_cont: |
||
1831 | push eax |
||
1832 | lea eax, [esp+16+8+12+8] |
||
1833 | call dword [eax-8] |
||
1834 | pop eax |
||
1835 | jnc .scan_dir |
||
1836 | cmp [hd_error], 0 |
||
1837 | jnz .fsfrfe3 |
||
1838 | push eax |
||
1839 | lea eax, [esp+16+8+12+8] |
||
1840 | call dword [eax+20] ; extend directory |
||
1841 | pop eax |
||
1842 | jnc .scan_dir |
||
1843 | add esp, 12+8+12+32 |
||
1844 | popad |
||
1845 | mov eax, ERROR_DISK_FULL |
||
1846 | xor ebx, ebx |
||
1847 | ret |
||
1848 | .free: |
||
1849 | test ecx, ecx |
||
1850 | jnz @f |
||
1851 | mov [esp], edi |
||
1852 | mov ecx, [esp+12+8+12+8] |
||
1853 | mov [esp+4], ecx |
||
1854 | mov ecx, [esp+12+8+12+12] |
||
1855 | mov [esp+8], ecx |
||
1856 | xor ecx, ecx |
||
1857 | @@: |
||
1858 | inc ecx |
||
1859 | cmp ecx, eax |
||
1860 | jb .scan_cont |
||
1861 | ; found! |
||
1862 | ; calculate name checksum |
||
1863 | push esi ecx |
||
1864 | mov esi, [esp+8+12] |
||
1865 | mov ecx, 11 |
||
1866 | xor eax, eax |
||
1867 | @@: |
||
1868 | ror al, 1 |
||
1869 | add al, [esi] |
||
1870 | inc esi |
||
1871 | loop @b |
||
1872 | pop ecx esi |
||
1873 | pop edi |
||
1874 | pop dword [esp+8+12+12] |
||
1875 | pop dword [esp+8+12+12] |
||
1876 | ; edi points to first entry in free chunk |
||
1877 | dec ecx |
||
1878 | jz .nolfn |
||
1879 | push esi |
||
1880 | push eax |
||
1881 | lea eax, [esp+8+8+12+8] |
||
1882 | call dword [eax+8] ; begin write |
||
1883 | mov al, 40h |
||
1884 | .writelfn: |
||
1885 | or al, cl |
||
1886 | mov esi, [esp+4] |
||
1887 | push ecx |
||
1888 | dec ecx |
||
1889 | imul ecx, 13 |
||
1890 | add esi, ecx |
||
1891 | stosb |
||
1892 | mov cl, 5 |
||
1893 | call fs_RamdiskRewrite.read_symbols |
||
1894 | mov ax, 0xF |
||
1895 | stosw |
||
1896 | mov al, [esp+4] |
||
1897 | stosb |
||
1898 | mov cl, 6 |
||
1899 | call fs_RamdiskRewrite.read_symbols |
||
1900 | xor eax, eax |
||
1901 | stosw |
||
1902 | mov cl, 2 |
||
1903 | call fs_RamdiskRewrite.read_symbols |
||
1904 | pop ecx |
||
1905 | lea eax, [esp+8+8+12+8] |
||
1906 | call dword [eax+12] ; next write |
||
1907 | xor eax, eax |
||
1908 | loop .writelfn |
||
1909 | pop eax |
||
1910 | pop esi |
||
1911 | ; lea eax, [esp+8+12+8] |
||
1912 | ; call dword [eax+16] ; end write |
||
1913 | .nolfn: |
||
1914 | xchg esi, [esp] |
||
1915 | mov ecx, 11 |
||
1916 | rep movsb |
||
1917 | mov word [edi], 20h ; attributes |
||
1918 | sub edi, 11 |
||
1919 | pop esi ecx |
||
1920 | add esp, 12 |
||
1921 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1922 | call get_time_for_file |
||
1923 | mov [edi+14], ax ; creation time |
||
1924 | mov [edi+22], ax ; last write time |
||
1925 | call get_date_for_file |
||
1926 | mov [edi+16], ax ; creation date |
||
1927 | mov [edi+24], ax ; last write date |
||
1928 | mov [edi+18], ax ; last access date |
||
1929 | xor ecx, ecx |
||
1930 | mov word [edi+20], cx ; high word of cluster |
||
1931 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
1932 | mov dword [edi+28], ecx ; file size - to be filled |
||
321 | diamond | 1933 | cmp byte [esp+32+28], cl |
1934 | jz .doit |
||
1935 | ; create directory |
||
1936 | mov byte [edi+11], 10h ; attributes: folder |
||
1937 | mov edx, edi |
||
1938 | lea eax, [esp+8] |
||
1939 | call dword [eax+16] ; flush directory |
||
1940 | push ecx |
||
1941 | mov ecx, [SECTORS_PER_CLUSTER] |
||
1942 | shl ecx, 9 |
||
1943 | jmp .doit2 |
||
83 | diamond | 1944 | .doit: |
1945 | lea eax, [esp+8] |
||
1946 | call dword [eax+16] ; flush directory |
||
1947 | push ecx |
||
1948 | mov ecx, [esp+4+32+24] |
||
321 | diamond | 1949 | .doit2: |
83 | diamond | 1950 | push ecx |
1951 | push edi |
||
1952 | mov esi, edx |
||
1953 | test ecx, ecx |
||
1954 | jz .done |
||
1955 | call get_free_FAT |
||
1956 | jc .diskfull |
||
1957 | push eax |
||
1958 | mov [edi+26], ax |
||
1959 | shr eax, 16 |
||
1960 | mov [edi+20], ax |
||
1961 | lea eax, [esp+16+8] |
||
1962 | call dword [eax+16] ; flush directory |
||
1963 | pop eax |
||
1964 | push edx |
||
1965 | mov edx, [fatEND] |
||
1966 | call set_FAT |
||
1967 | pop edx |
||
1968 | .write_cluster: |
||
1969 | push eax |
||
1970 | dec eax |
||
1971 | dec eax |
||
1972 | mov ebp, [SECTORS_PER_CLUSTER] |
||
1973 | imul eax, ebp |
||
1974 | add eax, [DATA_START] |
||
1975 | ; write data |
||
1976 | .write_sector: |
||
321 | diamond | 1977 | cmp byte [esp+16+32+28], 0 |
1978 | jnz .writedir |
||
83 | diamond | 1979 | mov ecx, 512 |
1980 | cmp dword [esp+8], ecx |
||
1981 | jb .writeshort |
||
1982 | ; we can write directly from given buffer |
||
1983 | mov ebx, esi |
||
1984 | add esi, ecx |
||
1985 | jmp .writecommon |
||
1986 | .writeshort: |
||
1987 | mov ecx, [esp+8] |
||
1988 | push ecx |
||
1989 | mov edi, buffer |
||
1990 | mov ebx, edi |
||
1991 | rep movsb |
||
321 | diamond | 1992 | .writedircont: |
83 | diamond | 1993 | mov ecx, buffer+0x200 |
1994 | sub ecx, edi |
||
1995 | push eax |
||
1996 | xor eax, eax |
||
1997 | rep stosb |
||
1998 | pop eax |
||
1999 | pop ecx |
||
2000 | .writecommon: |
||
2001 | call hd_write |
||
2002 | cmp [hd_error], 0 |
||
2003 | jnz .writeerr |
||
2004 | inc eax |
||
2005 | sub dword [esp+8], ecx |
||
2006 | jz .writedone |
||
2007 | dec ebp |
||
2008 | jnz .write_sector |
||
2009 | ; allocate new cluster |
||
2010 | pop eax |
||
2011 | mov ecx, eax |
||
2012 | call get_free_FAT |
||
2013 | jc .diskfull |
||
2014 | push edx |
||
2015 | mov edx, [fatEND] |
||
2016 | call set_FAT |
||
2017 | xchg eax, ecx |
||
2018 | mov edx, ecx |
||
2019 | call set_FAT |
||
2020 | pop edx |
||
2021 | xchg eax, ecx |
||
2022 | jmp .write_cluster |
||
2023 | .diskfull: |
||
2024 | mov eax, ERROR_DISK_FULL |
||
2025 | jmp .ret |
||
2026 | .writeerr: |
||
2027 | pop eax |
||
2028 | sub esi, ecx |
||
2029 | mov eax, 11 |
||
2030 | jmp .ret |
||
2031 | .writedone: |
||
2032 | pop eax |
||
2033 | .done: |
||
2034 | xor eax, eax |
||
2035 | .ret: |
||
2036 | pop edi ecx |
||
2037 | mov ebx, esi |
||
2038 | sub ebx, edx |
||
2039 | pop ebp |
||
2040 | mov [esp+32+28], eax |
||
2041 | lea eax, [esp+8] |
||
2042 | call dword [eax+8] |
||
2043 | mov [edi+28], ebx |
||
2044 | call dword [eax+16] |
||
2045 | mov [esp+32+16], ebx |
||
2046 | lea eax, [ebx+511] |
||
2047 | shr eax, 9 |
||
2048 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2049 | lea eax, [eax+ecx-1] |
||
2050 | xor edx, edx |
||
2051 | div ecx |
||
2052 | mov ecx, ebp |
||
2053 | sub ecx, eax |
||
2054 | call add_disk_free_space |
||
2055 | add esp, 32 |
||
2056 | call update_disk |
||
2057 | popad |
||
2058 | ret |
||
321 | diamond | 2059 | .writedir: |
2060 | push 512 |
||
2061 | mov edi, buffer |
||
2062 | mov ebx, edi |
||
2063 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2064 | shl ecx, 9 |
||
2065 | cmp ecx, [esp+12] |
||
2066 | jnz .writedircont |
||
2067 | dec dword [esp+16] |
||
2068 | push esi |
||
2069 | mov ecx, 32/4 |
||
2070 | rep movsd |
||
2071 | pop esi |
||
2072 | mov dword [edi-32], '. ' |
||
2073 | mov dword [edi-32+4], ' ' |
||
2074 | mov dword [edi-32+8], ' ' |
||
2075 | mov byte [edi-32+11], 10h |
||
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 | mov ecx, [esp+20+8] |
||
2085 | cmp ecx, [ROOT_CLUSTER] |
||
2086 | jnz @f |
||
2087 | xor ecx, ecx |
||
2088 | @@: |
||
2089 | mov word [edi-32+26], cx |
||
2090 | shr ecx, 16 |
||
2091 | mov [edi-32+20], cx |
||
2092 | jmp .writedircont |
||
83 | diamond | 2093 | |
131 | diamond | 2094 | ;---------------------------------------------------------------- |
2095 | ; |
||
256 | diamond | 2096 | ; fs_HdWrite - LFN variant for writing to hard disk |
131 | diamond | 2097 | ; |
2098 | ; esi points to filename |
||
2099 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2100 | ; may be ebx=0 - start from first byte |
||
2101 | ; ecx number of bytes to write, 0+ |
||
2102 | ; edx mem location to data |
||
2103 | ; |
||
2104 | ; ret ebx = bytes written (maybe 0) |
||
2105 | ; eax = 0 ok write or other = errormsg |
||
2106 | ; |
||
2107 | ;-------------------------------------------------------------- |
||
2108 | fs_HdWrite.access_denied: |
||
2109 | push ERROR_ACCESS_DENIED |
||
2110 | fs_HdWrite.ret0: |
||
2111 | pop eax |
||
2112 | xor ebx, ebx |
||
2113 | ret |
||
2114 | |||
2115 | fs_HdWrite.ret11: |
||
2116 | push 11 |
||
2117 | jmp fs_HdWrite.ret0 |
||
2118 | |||
2119 | fs_HdWrite: |
||
256 | diamond | 2120 | cmp [fs_type], 1 |
2121 | jz ntfs_HdWrite |
||
2122 | cmp [fs_type], 16 |
||
2123 | jz @f |
||
2124 | cmp [fs_type], 32 |
||
2125 | jz @f |
||
131 | diamond | 2126 | push ERROR_UNKNOWN_FS |
2127 | jmp .ret0 |
||
2128 | @@: |
||
2129 | cmp byte [esi], 0 |
||
2130 | jz .access_denied |
||
2131 | pushad |
||
2132 | call hd_find_lfn |
||
2133 | pushfd |
||
2134 | cmp [hd_error], 0 |
||
2135 | jz @f |
||
2136 | popfd |
||
2137 | popad |
||
2138 | push 11 |
||
2139 | jmp .ret0 |
||
2140 | @@: |
||
2141 | popfd |
||
2142 | jnc .found |
||
2143 | popad |
||
2144 | push ERROR_FILE_NOT_FOUND |
||
2145 | jmp .ret0 |
||
2146 | .found: |
||
2147 | ; FAT does not support files larger than 4GB |
||
2148 | test ebx, ebx |
||
2149 | jz .l1 |
||
2150 | cmp dword [ebx+4], 0 |
||
2151 | jz @f |
||
2152 | .eof: |
||
2153 | popad |
||
2154 | push ERROR_END_OF_FILE |
||
2155 | jmp .ret0 |
||
2156 | @@: |
||
2157 | mov ebx, [ebx] |
||
2158 | .l1: |
||
2159 | ; now edi points to direntry, ebx=start byte to write, |
||
2160 | ; ecx=number of bytes to write, edx=data pointer |
||
2161 | |||
2162 | ; extend file if needed |
||
2163 | add ecx, ebx |
||
2164 | jc .eof ; FAT does not support files larger than 4GB |
||
2165 | push eax ; save directory sector |
||
2166 | push 0 ; return value=0 |
||
2167 | |||
2168 | call get_time_for_file |
||
2169 | mov [edi+22], ax ; last write time |
||
2170 | call get_date_for_file |
||
2171 | mov [edi+24], ax ; last write date |
||
2172 | mov [edi+18], ax ; last access date |
||
2173 | |||
2174 | push dword [edi+28] ; save current file size |
||
2175 | cmp ecx, [edi+28] |
||
2176 | jbe .length_ok |
||
2177 | cmp ecx, ebx |
||
2178 | jz .length_ok |
||
2179 | call hd_extend_file |
||
2180 | jnc .length_ok |
||
2181 | mov [esp+4], eax |
||
2182 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2183 | ; First two cases are fatal errors, in third case we may write some data |
||
2184 | cmp al, ERROR_DISK_FULL |
||
2185 | jz .disk_full |
||
2186 | pop eax |
||
2187 | pop eax |
||
2188 | mov [esp+4+28], eax |
||
2189 | pop eax |
||
2190 | popad |
||
2191 | xor ebx, ebx |
||
2192 | ret |
||
2193 | .disk_full: |
||
2194 | ; correct number of bytes to write |
||
2195 | mov ecx, [edi+28] |
||
2196 | cmp ecx, ebx |
||
2197 | ja .length_ok |
||
2198 | .ret: |
||
2199 | call update_disk |
||
2200 | cmp [hd_error], 0 |
||
2201 | jz @f |
||
2202 | mov byte [esp+4], 11 |
||
2203 | @@: |
||
2204 | pop eax |
||
2205 | pop eax |
||
2206 | mov [esp+4+28], eax ; eax=return value |
||
2207 | pop eax |
||
2208 | sub edx, [esp+20] |
||
2209 | mov [esp+16], edx ; ebx=number of written bytes |
||
2210 | popad |
||
2211 | ret |
||
2212 | .length_ok: |
||
2213 | mov esi, [edi+28] |
||
2214 | mov eax, [edi+20-2] |
||
2215 | mov ax, [edi+26] |
||
2216 | mov edi, eax ; edi=current cluster |
||
2217 | xor ebp, ebp ; ebp=current sector in cluster |
||
2218 | ; save directory |
||
2219 | mov eax, [esp+8] |
||
2220 | push ebx |
||
2221 | mov ebx, buffer |
||
2222 | call hd_write |
||
2223 | pop ebx |
||
2224 | cmp [hd_error], 0 |
||
2225 | jz @f |
||
2226 | .device_err: |
||
2227 | mov byte [esp+4], 11 |
||
2228 | jmp .ret |
||
2229 | @@: |
||
2230 | |||
2231 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
2232 | sub ecx, ebx |
||
2233 | jz .ret |
||
2234 | .write_loop: |
||
321 | diamond | 2235 | ; skip unmodified sectors |
2236 | cmp dword [esp], 0x200 |
||
2237 | jb .modify |
||
2238 | sub ebx, 0x200 |
||
2239 | jae .skip |
||
2240 | add ebx, 0x200 |
||
2241 | .modify: |
||
131 | diamond | 2242 | ; get length of data in current sector |
2243 | push ecx |
||
2244 | sub ebx, 0x200 |
||
2245 | jb .hasdata |
||
2246 | neg ebx |
||
2247 | xor ecx, ecx |
||
2248 | jmp @f |
||
2249 | .hasdata: |
||
2250 | neg ebx |
||
2251 | cmp ecx, ebx |
||
2252 | jbe @f |
||
2253 | mov ecx, ebx |
||
2254 | @@: |
||
2255 | ; get current sector number |
||
2256 | mov eax, edi |
||
2257 | dec eax |
||
2258 | dec eax |
||
2259 | imul eax, [SECTORS_PER_CLUSTER] |
||
2260 | add eax, [DATA_START] |
||
2261 | add eax, ebp |
||
2262 | ; load sector if needed |
||
2263 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
2264 | jz .noread |
||
2265 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2266 | jz .noread |
||
2267 | cmp ecx, esi ; (same for the last sector) |
||
2268 | jz .noread |
||
2269 | push ebx |
||
2270 | mov ebx, buffer |
||
2271 | call hd_read |
||
2272 | pop ebx |
||
2273 | cmp [hd_error], 0 |
||
2274 | jz @f |
||
2275 | .device_err2: |
||
2276 | pop ecx |
||
2277 | jmp .device_err |
||
2278 | @@: |
||
2279 | .noread: |
||
2280 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2281 | push eax ecx edi |
||
2282 | xor eax, eax |
||
2283 | mov ecx, 0x200 |
||
2284 | sub ecx, [esp+4+12] |
||
2285 | jbe @f |
||
2286 | mov edi, buffer |
||
2287 | add edi, [esp+4+12] |
||
2288 | rep stosb |
||
2289 | @@: |
||
2290 | ; zero uninitialized data in the last sector |
||
2291 | mov ecx, 0x200 |
||
2292 | sub ecx, esi |
||
2293 | jbe @f |
||
2294 | mov edi, buffer |
||
2295 | add edi, esi |
||
2296 | rep stosb |
||
2297 | @@: |
||
321 | diamond | 2298 | pop edi ecx |
131 | diamond | 2299 | ; copy new data |
2300 | mov eax, edx |
||
2301 | neg ebx |
||
2302 | jecxz @f |
||
2303 | add ebx, buffer+0x200 |
||
2304 | call memmove |
||
2305 | xor ebx, ebx |
||
2306 | @@: |
||
2307 | pop eax |
||
2308 | ; save sector |
||
2309 | push ebx |
||
2310 | mov ebx, buffer |
||
2311 | call hd_write |
||
2312 | pop ebx |
||
2313 | cmp [hd_error], 0 |
||
2314 | jnz .device_err2 |
||
2315 | add edx, ecx |
||
2316 | sub [esp], ecx |
||
2317 | pop ecx |
||
2318 | jz .ret |
||
321 | diamond | 2319 | .skip: |
131 | diamond | 2320 | ; next sector |
2321 | inc ebp |
||
2322 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2323 | jb @f |
||
2324 | xor ebp, ebp |
||
2325 | mov eax, edi |
||
2326 | call get_FAT |
||
2327 | mov edi, eax |
||
2328 | cmp [hd_error], 0 |
||
2329 | jnz .device_err |
||
2330 | @@: |
||
2331 | sub esi, 0x200 |
||
2332 | jae @f |
||
2333 | xor esi, esi |
||
2334 | @@: |
||
2335 | sub dword [esp], 0x200 |
||
2336 | jae @f |
||
2337 | and dword [esp], 0 |
||
2338 | @@: jmp .write_loop |
||
2339 | |||
2340 | hd_extend_file.zero_size: |
||
2341 | xor eax, eax |
||
2342 | jmp hd_extend_file.start_extend |
||
2343 | |||
2344 | ; extends file on hd to given size (new data area is undefined) |
||
2345 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 2346 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 2347 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
2348 | hd_extend_file: |
||
2349 | push ebp |
||
2350 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2351 | imul ebp, [BYTES_PER_SECTOR] |
||
2352 | push ecx |
||
2353 | ; find the last cluster of file |
||
2354 | mov eax, [edi+20-2] |
||
2355 | mov ax, [edi+26] |
||
2356 | mov ecx, [edi+28] |
||
2357 | jecxz .zero_size |
||
2358 | .last_loop: |
||
2359 | sub ecx, ebp |
||
2360 | jbe .last_found |
||
2361 | call get_FAT |
||
2362 | cmp [hd_error], 0 |
||
2363 | jz @f |
||
2364 | .device_err: |
||
2365 | pop ecx |
||
2366 | .device_err2: |
||
2367 | pop ebp |
||
2368 | push 11 |
||
2369 | .ret_err: |
||
2370 | pop eax |
||
2371 | stc |
||
2372 | ret |
||
2373 | @@: |
||
2374 | cmp eax, 2 |
||
2375 | jb .fat_err |
||
2376 | cmp eax, [fatRESERVED] |
||
2377 | jb .last_loop |
||
2378 | .fat_err: |
||
2379 | pop ecx ebp |
||
2380 | push ERROR_FAT_TABLE |
||
2381 | jmp .ret_err |
||
2382 | .last_found: |
||
2383 | push eax |
||
2384 | call get_FAT |
||
2385 | cmp [hd_error], 0 |
||
2386 | jz @f |
||
2387 | pop eax |
||
2388 | jmp .device_err |
||
2389 | @@: |
||
2390 | cmp eax, [fatRESERVED] |
||
2391 | pop eax |
||
2392 | jb .fat_err |
||
2393 | ; set length to full number of clusters |
||
2394 | sub [edi+28], ecx |
||
2395 | .start_extend: |
||
2396 | pop ecx |
||
2397 | ; now do extend |
||
2398 | push edx |
||
2399 | mov edx, 2 ; start scan from cluster 2 |
||
2400 | .extend_loop: |
||
2401 | cmp [edi+28], ecx |
||
2402 | jae .extend_done |
||
2403 | ; add new cluster |
||
2404 | push eax |
||
2405 | call get_free_FAT |
||
2406 | jc .disk_full |
||
2407 | mov edx, [fatEND] |
||
2408 | call set_FAT |
||
2409 | mov edx, eax |
||
2410 | pop eax |
||
2411 | test eax, eax |
||
2412 | jz .first_cluster |
||
2413 | push edx |
||
2414 | call set_FAT |
||
2415 | pop edx |
||
2416 | jmp @f |
||
2417 | .first_cluster: |
||
2418 | ror edx, 16 |
||
2419 | mov [edi+20], dx |
||
2420 | ror edx, 16 |
||
2421 | mov [edi+26], dx |
||
2422 | @@: |
||
133 | diamond | 2423 | push ecx |
2424 | mov ecx, -1 |
||
2425 | call add_disk_free_space |
||
2426 | pop ecx |
||
131 | diamond | 2427 | mov eax, edx |
2428 | cmp [hd_error], 0 |
||
2429 | jnz .device_err3 |
||
2430 | add [edi+28], ebp |
||
2431 | jmp .extend_loop |
||
2432 | .extend_done: |
||
2433 | mov [edi+28], ecx |
||
2434 | pop edx ebp |
||
133 | diamond | 2435 | xor eax, eax ; CF=0 |
131 | diamond | 2436 | ret |
2437 | .device_err3: |
||
2438 | pop edx |
||
2439 | jmp .device_err2 |
||
2440 | .disk_full: |
||
2441 | pop eax edx ebp |
||
2442 | push ERROR_DISK_FULL |
||
2443 | pop eax |
||
2444 | cmp [hd_error], 0 |
||
2445 | jz @f |
||
2446 | mov al, 11 |
||
2447 | @@: stc |
||
2448 | ret |
||
2449 | |||
133 | diamond | 2450 | ;---------------------------------------------------------------- |
2451 | ; |
||
2452 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
2453 | ; |
||
2454 | ; esi points to filename |
||
2455 | ; ebx points to 64-bit number = new file size |
||
2456 | ; ecx ignored (reserved) |
||
2457 | ; edx ignored (reserved) |
||
2458 | ; |
||
2459 | ; ret eax = 0 ok or other = errormsg |
||
2460 | ; |
||
2461 | ;-------------------------------------------------------------- |
||
2462 | fs_HdSetFileEnd: |
||
256 | diamond | 2463 | cmp [fs_type], 1 |
2464 | jz ntfs_HdSetFileEnd |
||
2465 | cmp [fs_type], 16 |
||
2466 | jz @f |
||
2467 | cmp [fs_type], 32 |
||
2468 | jz @f |
||
133 | diamond | 2469 | push ERROR_UNKNOWN_FS |
2470 | .ret: |
||
2471 | pop eax |
||
2472 | ret |
||
2473 | @@: |
||
2474 | cmp byte [esi], 0 |
||
2475 | jnz @f |
||
2476 | .access_denied: |
||
2477 | push ERROR_ACCESS_DENIED |
||
2478 | jmp .ret |
||
2479 | @@: |
||
2480 | push edi |
||
2481 | call hd_find_lfn |
||
2482 | pushfd |
||
2483 | cmp [hd_error], 0 |
||
2484 | jz @f |
||
2485 | popfd |
||
2486 | push 11 |
||
2487 | jmp .ret |
||
2488 | @@: |
||
2489 | popfd |
||
2490 | jnc @f |
||
2491 | pop edi |
||
2492 | push ERROR_FILE_NOT_FOUND |
||
2493 | jmp .ret |
||
2494 | @@: |
||
2495 | ; must not be directory |
||
2496 | test byte [edi+11], 10h |
||
2497 | jz @f |
||
2498 | pop edi |
||
2499 | jmp .access_denied |
||
2500 | @@: |
||
2501 | ; file size must not exceed 4 Gb |
||
2502 | cmp dword [ebx+4], 0 |
||
2503 | jz @f |
||
2504 | pop edi |
||
2505 | push ERROR_END_OF_FILE |
||
2506 | jmp .ret |
||
2507 | @@: |
||
2508 | push eax ; save directory sector |
||
2509 | ; set file modification date/time to current |
||
2510 | call fat_update_datetime |
||
2511 | mov eax, [ebx] |
||
2512 | cmp eax, [edi+28] |
||
2513 | jb .truncate |
||
2514 | ja .expand |
||
2515 | pop eax |
||
2516 | mov ebx, buffer |
||
2517 | call hd_write |
||
2518 | pop edi |
||
2519 | xor eax, eax |
||
2520 | cmp [hd_error], 0 |
||
2521 | jz @f |
||
2522 | mov al, 11 |
||
2523 | @@: |
||
2524 | ret |
||
2525 | .expand: |
||
2526 | push ebx ebp ecx |
||
2527 | push dword [edi+28] ; save old size |
||
2528 | mov ecx, eax |
||
2529 | call hd_extend_file |
||
2530 | push eax ; return code |
||
2531 | jnc .expand_ok |
||
2532 | cmp al, ERROR_DISK_FULL |
||
2533 | jz .disk_full |
||
2534 | .pop_ret: |
||
2535 | call update_disk |
||
2536 | pop eax ecx ebp ebx ecx edi edi |
||
2537 | ret |
||
2538 | .expand_ok: |
||
2539 | .disk_full: |
||
2540 | ; save directory |
||
2541 | mov eax, [edi+28] |
||
2542 | xchg eax, [esp+20] |
||
2543 | mov ebx, buffer |
||
2544 | call hd_write |
||
2545 | mov eax, [edi+20-2] |
||
2546 | mov ax, [edi+26] |
||
2547 | mov edi, eax |
||
2548 | cmp [hd_error], 0 |
||
2549 | jz @f |
||
2550 | .pop_ret11: |
||
2551 | mov byte [esp], 11 |
||
2552 | jmp .pop_ret |
||
2553 | @@: |
||
2554 | ; now zero new data |
||
2555 | xor ebp, ebp |
||
2556 | ; edi=current cluster, ebp=sector in cluster |
||
2557 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
||
2558 | .zero_loop: |
||
2559 | sub dword [esp+4], 0x200 |
||
2560 | jae .next_cluster |
||
2561 | lea eax, [edi-2] |
||
2562 | imul eax, [SECTORS_PER_CLUSTER] |
||
2563 | add eax, [DATA_START] |
||
2564 | add eax, ebp |
||
2565 | cmp dword [esp+4], -0x200 |
||
2566 | jz .noread |
||
2567 | mov ebx, buffer |
||
2568 | call hd_read |
||
2569 | cmp [hd_error], 0 |
||
2570 | jnz .err_next |
||
2571 | .noread: |
||
2572 | mov ecx, [esp+4] |
||
2573 | neg ecx |
||
2574 | push edi |
||
2575 | mov edi, buffer+0x200 |
||
2576 | add edi, [esp+8] |
||
2577 | push eax |
||
2578 | xor eax, eax |
||
2579 | mov [esp+12], eax |
||
2580 | rep stosb |
||
2581 | pop eax |
||
2582 | pop edi |
||
2583 | call hd_write |
||
2584 | cmp [hd_error], 0 |
||
2585 | jz .next_cluster |
||
2586 | .err_next: |
||
2587 | mov byte [esp], 11 |
||
2588 | .next_cluster: |
||
2589 | sub dword [esp+20], 0x200 |
||
2590 | jbe .pop_ret |
||
2591 | inc ebp |
||
2592 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2593 | jb .zero_loop |
||
2594 | xor ebp, ebp |
||
2595 | mov eax, edi |
||
2596 | call get_FAT |
||
2597 | mov edi, eax |
||
2598 | cmp [hd_error], 0 |
||
2599 | jnz .pop_ret11 |
||
2600 | jmp .zero_loop |
||
2601 | .truncate: |
||
2602 | mov [edi+28], eax |
||
2603 | push ecx |
||
2604 | mov ecx, [edi+20-2] |
||
2605 | mov cx, [edi+26] |
||
2606 | push eax |
||
2607 | test eax, eax |
||
2608 | jz .zero_size |
||
2609 | ; find new last cluster |
||
2610 | @@: |
||
2611 | mov eax, [SECTORS_PER_CLUSTER] |
||
2612 | shl eax, 9 |
||
2613 | sub [esp], eax |
||
2614 | jbe @f |
||
2615 | mov eax, ecx |
||
2616 | call get_FAT |
||
2617 | mov ecx, eax |
||
2618 | cmp [hd_error], 0 |
||
2619 | jz @b |
||
2620 | .device_err3: |
||
2621 | pop eax ecx eax edi |
||
2622 | push 11 |
||
2623 | pop eax |
||
2624 | ret |
||
2625 | @@: |
||
2626 | ; we will zero data at the end of last sector - remember it |
||
2627 | push ecx |
||
2628 | ; terminate FAT chain |
||
2629 | push edx |
||
2630 | mov eax, ecx |
||
2631 | mov edx, [fatEND] |
||
2632 | call set_FAT |
||
2633 | mov eax, edx |
||
2634 | pop edx |
||
2635 | cmp [hd_error], 0 |
||
2636 | jz @f |
||
2637 | .device_err4: |
||
2638 | pop ecx |
||
2639 | jmp .device_err3 |
||
2640 | .zero_size: |
||
2641 | and word [edi+20], 0 |
||
2642 | and word [edi+26], 0 |
||
2643 | push 0 |
||
2644 | mov eax, ecx |
||
2645 | @@: |
||
2646 | ; delete FAT chain |
||
2647 | call clear_cluster_chain |
||
2648 | cmp [hd_error], 0 |
||
2649 | jnz .device_err4 |
||
2650 | ; save directory |
||
2651 | mov eax, [esp+12] |
||
2652 | push ebx |
||
2653 | mov ebx, buffer |
||
2654 | call hd_write |
||
2655 | pop ebx |
||
2656 | cmp [hd_error], 0 |
||
2657 | jnz .device_err4 |
||
2658 | ; zero last sector, ignore errors |
||
2659 | pop ecx |
||
2660 | pop eax |
||
2661 | dec ecx |
||
2662 | imul ecx, [SECTORS_PER_CLUSTER] |
||
2663 | add ecx, [DATA_START] |
||
2664 | push eax |
||
2665 | sar eax, 9 |
||
2666 | add ecx, eax |
||
2667 | pop eax |
||
2668 | and eax, 0x1FF |
||
2669 | jz .truncate_done |
||
2670 | push ebx eax |
||
2671 | mov eax, ecx |
||
2672 | mov ebx, buffer |
||
2673 | call hd_read |
||
2674 | pop eax |
||
2675 | lea edi, [buffer+eax] |
||
2676 | push ecx |
||
2677 | mov ecx, 0x200 |
||
2678 | sub ecx, eax |
||
2679 | xor eax, eax |
||
2680 | rep stosb |
||
2681 | pop eax |
||
2682 | call hd_write |
||
2683 | pop ebx |
||
2684 | .truncate_done: |
||
2685 | pop ecx eax edi |
||
2686 | call update_disk |
||
2687 | xor eax, eax |
||
2688 | cmp [hd_error], 0 |
||
2689 | jz @f |
||
2690 | mov al, 11 |
||
2691 | @@: |
||
2692 | ret |
||
2693 | |||
86 | diamond | 2694 | fs_HdGetFileInfo: |
256 | diamond | 2695 | cmp [fs_type], 1 |
2696 | jz ntfs_HdGetFileInfo |
||
2697 | cmp [fs_type], 16 |
||
2698 | jz @f |
||
2699 | cmp [fs_type], 32 |
||
2700 | jz @f |
||
86 | diamond | 2701 | mov eax, ERROR_UNKNOWN_FS |
2702 | ret |
||
2703 | @@: |
||
2704 | cmp byte [esi], 0 |
||
2705 | jnz @f |
||
2706 | mov eax, 2 |
||
2707 | ret |
||
2708 | @@: |
||
2709 | push edi |
||
2710 | call hd_find_lfn |
||
2711 | pushfd |
||
2712 | cmp [hd_error], 0 |
||
2713 | jz @f |
||
2714 | popfd |
||
2715 | pop edi |
||
2716 | mov eax, 11 |
||
2717 | ret |
||
2718 | @@: |
||
2719 | popfd |
||
2720 | jmp fs_GetFileInfo_finish |
||
2721 | |||
2722 | fs_HdSetFileInfo: |
||
256 | diamond | 2723 | cmp [fs_type], 1 |
2724 | jz ntfs_HdSetFileInfo |
||
2725 | cmp [fs_type], 16 |
||
2726 | jz @f |
||
2727 | cmp [fs_type], 32 |
||
2728 | jz @f |
||
86 | diamond | 2729 | mov eax, ERROR_UNKNOWN_FS |
2730 | ret |
||
2731 | @@: |
||
2732 | cmp byte [esi], 0 |
||
2733 | jnz @f |
||
2734 | mov eax, 2 |
||
2735 | ret |
||
2736 | @@: |
||
2737 | push edi |
||
2738 | call hd_find_lfn |
||
2739 | pushfd |
||
2740 | cmp [hd_error], 0 |
||
2741 | jz @f |
||
2742 | popfd |
||
2743 | pop edi |
||
2744 | mov eax, 11 |
||
2745 | ret |
||
2746 | @@: |
||
2747 | popfd |
||
2748 | jnc @f |
||
2749 | pop edi |
||
2750 | mov eax, ERROR_FILE_NOT_FOUND |
||
2751 | ret |
||
2752 | @@: |
||
2753 | push eax |
||
2754 | call bdfe_to_fat_entry |
||
2755 | pop eax |
||
2756 | mov ebx, buffer |
||
2757 | call hd_write |
||
2758 | call update_disk |
||
2759 | pop edi |
||
2760 | xor eax, eax |
||
2761 | ret |
||
2762 | |||
91 | diamond | 2763 | ;---------------------------------------------------------------- |
2764 | ; |
||
171 | diamond | 2765 | ; fs_HdDelete - delete file or empty folder from hard disk |
2766 | ; |
||
2767 | ; esi points to filename |
||
2768 | ; |
||
2769 | ; ret eax = 0 ok or other = errormsg |
||
2770 | ; |
||
2771 | ;-------------------------------------------------------------- |
||
2772 | fs_HdDelete: |
||
256 | diamond | 2773 | cmp [fs_type], 1 |
2774 | jz ntfs_HdDelete |
||
2775 | cmp [fs_type], 16 |
||
2776 | jz @f |
||
2777 | cmp [fs_type], 32 |
||
2778 | jz @f |
||
171 | diamond | 2779 | push ERROR_UNKNOWN_FS |
2780 | .pop_ret: |
||
2781 | pop eax |
||
2782 | ret |
||
2783 | @@: |
||
2784 | cmp byte [esi], 0 |
||
2785 | jnz @f |
||
2786 | ; cannot delete root! |
||
2787 | .access_denied: |
||
2788 | push ERROR_ACCESS_DENIED |
||
2789 | jmp .pop_ret |
||
2790 | @@: |
||
2791 | and [longname_sec1], 0 |
||
2792 | and [longname_sec2], 0 |
||
2793 | push edi |
||
2794 | call hd_find_lfn |
||
2795 | jnc .found |
||
2796 | pop edi |
||
2797 | push ERROR_FILE_NOT_FOUND |
||
2798 | jmp .pop_ret |
||
2799 | .found: |
||
2800 | cmp dword [edi], '. ' |
||
2801 | jz .access_denied2 |
||
2802 | cmp dword [edi], '.. ' |
||
2803 | jz .access_denied2 |
||
2804 | test byte [edi+11], 10h |
||
2805 | jz .dodel |
||
2806 | ; we can delete only empty folders! |
||
2807 | pushad |
||
2808 | mov ebp, [edi+20-2] |
||
2809 | mov bp, [edi+26] |
||
2810 | xor ecx, ecx |
||
2811 | lea eax, [ebp-2] |
||
2812 | imul eax, [SECTORS_PER_CLUSTER] |
||
2813 | add eax, [DATA_START] |
||
2814 | mov ebx, buffer |
||
2815 | call hd_read |
||
2816 | cmp [hd_error], 0 |
||
2817 | jnz .err1 |
||
2818 | add ebx, 2*0x20 |
||
2819 | .checkempty: |
||
2820 | cmp byte [ebx], 0 |
||
2821 | jz .empty |
||
2822 | cmp byte [ebx], 0xE5 |
||
2823 | jnz .notempty |
||
2824 | add ebx, 0x20 |
||
2825 | cmp ebx, buffer+0x200 |
||
2826 | jb .checkempty |
||
2827 | inc ecx |
||
2828 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
2829 | jb @f |
||
2830 | mov eax, ebp |
||
2831 | call get_FAT |
||
2832 | cmp [hd_error], 0 |
||
2833 | jnz .err1 |
||
2834 | mov ebp, eax |
||
2835 | xor ecx, ecx |
||
2836 | @@: |
||
2837 | lea eax, [ebp-2] |
||
2838 | imul eax, [SECTORS_PER_CLUSTER] |
||
2839 | add eax, [DATA_START] |
||
2840 | add eax, ecx |
||
2841 | mov ebx, buffer |
||
2842 | call hd_read |
||
2843 | cmp [hd_error], 0 |
||
2844 | jz .checkempty |
||
2845 | .err1: |
||
2846 | popad |
||
2847 | .err2: |
||
2848 | pop edi |
||
2849 | push 11 |
||
2850 | pop eax |
||
2851 | ret |
||
2852 | .notempty: |
||
2853 | popad |
||
2854 | .access_denied2: |
||
2855 | pop edi |
||
2856 | push ERROR_ACCESS_DENIED |
||
2857 | pop eax |
||
2858 | ret |
||
2859 | .empty: |
||
2860 | popad |
||
2861 | push ebx |
||
2862 | mov ebx, buffer |
||
2863 | call hd_read |
||
2864 | pop ebx |
||
2865 | cmp [hd_error], 0 |
||
2866 | jnz .err2 |
||
2867 | .dodel: |
||
2868 | push eax |
||
2869 | mov eax, [edi+20-2] |
||
2870 | mov ax, [edi+26] |
||
2871 | xchg eax, [esp] |
||
2872 | ; delete folder entry |
||
2873 | mov byte [edi], 0xE5 |
||
2874 | ; delete LFN (if present) |
||
2875 | .lfndel: |
||
2876 | cmp edi, buffer |
||
2877 | ja @f |
||
2878 | cmp [longname_sec2], 0 |
||
2879 | jz .lfndone |
||
2880 | push [longname_sec2] |
||
2881 | push [longname_sec1] |
||
2882 | pop [longname_sec2] |
||
2883 | and [longname_sec1], 0 |
||
2884 | push ebx |
||
2885 | mov ebx, buffer |
||
2886 | call hd_write |
||
2887 | mov eax, [esp+4] |
||
2888 | call hd_read |
||
2889 | pop ebx |
||
2890 | pop eax |
||
2891 | mov edi, buffer+0x200 |
||
2892 | @@: |
||
2893 | sub edi, 0x20 |
||
2894 | cmp byte [edi], 0xE5 |
||
2895 | jz .lfndone |
||
2896 | cmp byte [edi+11], 0xF |
||
2897 | jnz .lfndone |
||
2898 | mov byte [edi], 0xE5 |
||
2899 | jmp .lfndel |
||
2900 | .lfndone: |
||
2901 | push ebx |
||
2902 | mov ebx, buffer |
||
2903 | call hd_write |
||
2904 | pop ebx |
||
2905 | ; delete FAT chain |
||
2906 | pop eax |
||
2907 | call clear_cluster_chain |
||
2908 | call update_disk |
||
2909 | pop edi |
||
2910 | xor eax, eax |
||
2911 | cmp [hd_error], 0 |
||
2912 | jz @f |
||
2913 | mov al, 11 |
||
2914 | @@: |
||
2915 | ret |
||
2916 | |||
74 | mario79 | 2917 | ; \end{diamond}=>=>>> |