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