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Rev | Author | Line No. | Line |
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1 | ha | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; FAT32.INC ;; |
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4 | ;; ;; |
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131 | diamond | 5 | ;; FAT16/32 functions for KolibriOS ;; |
1 | ha | 6 | ;; ;; |
7 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
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8 | ;; ;; |
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9 | ;; See file COPYING for details ;; |
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171 | diamond | 10 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
139 | diamond | 11 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
131 | diamond | 12 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
91 | diamond | 13 | ;; 23.06.2006 LFN start application - diamond ;; |
86 | diamond | 14 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
83 | diamond | 15 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
75 | diamond | 16 | ;; 04.05.2006 LFN read folder - diamond ;; |
74 | mario79 | 17 | ;; 29.04.2006 Elimination of hangup after the ;; |
18 | ;; expiration hd_wait_timeout - Mario79 ;; |
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75 | diamond | 19 | ;; 23.04.2006 LFN read file - diamond ;; |
65 | mario79 | 20 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
21 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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1 | ha | 22 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
23 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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24 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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25 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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26 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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27 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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28 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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29 | ;; 08.11.2004 rename - ATV ;; |
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30 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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31 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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32 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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33 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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34 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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35 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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36 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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37 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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38 | ;; 20.5.2002 Hd status check - VT ;; |
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39 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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40 | ;; ;; |
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41 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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42 | |||
43 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
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44 | |||
52 | mikedld | 45 | ERROR_SUCCESS = 0 |
46 | ERROR_DISK_BASE = 1 |
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47 | ERROR_UNSUPPORTED_FS = 2 |
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48 | ERROR_UNKNOWN_FS = 3 |
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49 | ERROR_PARTITION = 4 |
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50 | ERROR_FILE_NOT_FOUND = 5 |
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51 | ERROR_END_OF_FILE = 6 |
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52 | ERROR_MEMORY_POINTER = 7 |
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53 | ERROR_DISK_FULL = 8 |
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54 | ERROR_FAT_TABLE = 9 |
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55 | ERROR_ACCESS_DENIED = 10 |
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1 | ha | 56 | |
57 | PUSHAD_EAX equ [esp+28] |
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58 | PUSHAD_ECX equ [esp+24] |
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59 | PUSHAD_EDX equ [esp+20] |
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60 | PUSHAD_EBX equ [esp+16] |
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61 | PUSHAD_EBP equ [esp+8] |
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62 | PUSHAD_ESI equ [esp+4] |
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63 | PUSHAD_EDI equ [esp+0] |
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64 | |||
171 | diamond | 65 | uglobal |
66 | align 4 |
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1 | ha | 67 | cluster dd 0 ; used by file_write,makedir,append |
68 | partition_count dd 0 ; partitions found by set_FAT32_variables |
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69 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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70 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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71 | |||
72 | hd_error dd 0 ; set by wait_for_sector_buffer |
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73 | hd_setup dd 0 |
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74 | hd_wait_timeout dd 0 |
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75 | |||
76 | cluster_tmp dd 0 ; used by analyze_directory |
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77 | ; and analyze_directory_to_write |
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78 | |||
79 | file_size dd 0 ; used by file_read |
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80 | |||
81 | sector_tmp dd 0 ; used by rename,append,file_write |
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82 | entry_pos dd 0 ; used by rename,append,file_write |
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83 | |||
84 | old_filesize dd 0 ; used by append |
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85 | new_filepos dd 0 ; used by append |
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86 | bytes2write dd 0 ; used by append |
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87 | |||
88 | cache_search_start dd 0 ; used by find_empty_slot |
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171 | diamond | 89 | endg |
1 | ha | 90 | |
171 | diamond | 91 | iglobal |
1 | ha | 92 | fat_in_cache dd -1 |
171 | diamond | 93 | endg |
1 | ha | 94 | |
95 | uglobal |
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171 | diamond | 96 | align 4 |
97 | fat_cache: times 512 db 0 |
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1 | ha | 98 | Sector512: ; label for dev_hdcd.inc |
99 | buffer: times 512 db 0 |
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100 | deltree_buffer: times 512 db 0 |
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133 | diamond | 101 | fsinfo_buffer: times 512 db 0 |
1 | ha | 102 | endg |
103 | |||
104 | iglobal |
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105 | NewDirEntry1 db ". ",0x10 |
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106 | times 20 db 0 |
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107 | NewDirEntry2 db ".. ",0x10 |
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108 | times 20 db 0 |
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109 | endg |
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110 | |||
111 | uglobal |
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112 | dir_entry: times 32 db 0 |
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113 | |||
114 | startpath: times 255 db 0 |
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115 | |||
116 | fat16_root db 0 ; flag for fat16 rootdir |
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117 | fat_change db 0 ; 1=fat has changed |
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118 | |||
119 | endg |
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120 | |||
121 | reserve_hd1: |
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122 | |||
123 | cli |
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124 | cmp [hd1_status],0 |
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125 | je reserve_ok1 |
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126 | |||
127 | sti |
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128 | call change_task |
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129 | jmp reserve_hd1 |
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130 | |||
131 | reserve_ok1: |
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132 | |||
133 | push eax |
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134 | mov eax,[0x3000] |
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135 | shl eax,5 |
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115 | poddubny | 136 | mov eax,[eax+0x3000+TASKDATA.pid] |
1 | ha | 137 | mov [hd1_status],eax |
138 | pop eax |
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139 | sti |
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140 | ret |
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95 | mario79 | 141 | ;******************************************** |
142 | reserve_hd_channel: |
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143 | cmp [hdbase], 0x1F0 |
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144 | jne .IDE_Channel_2 |
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145 | .IDE_Channel_1: |
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146 | cli |
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147 | cmp [IDE_Channel_1],0 |
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148 | je .reserve_ok_1 |
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149 | sti |
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150 | call change_task |
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151 | jmp .IDE_Channel_1 |
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152 | .IDE_Channel_2: |
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153 | cli |
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154 | cmp [IDE_Channel_2],0 |
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155 | je .reserve_ok_2 |
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156 | sti |
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157 | call change_task |
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158 | jmp .IDE_Channel_1 |
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159 | .reserve_ok_1: |
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160 | mov [IDE_Channel_1],1 |
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161 | ret |
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162 | .reserve_ok_2: |
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163 | mov [IDE_Channel_2],1 |
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164 | ret |
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165 | |||
166 | free_hd_channel: |
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167 | cmp [hdbase], 0x1F0 |
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168 | jne .IDE_Channel_2 |
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169 | .IDE_Channel_1: |
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170 | mov [IDE_Channel_1],0 |
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171 | ret |
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172 | .IDE_Channel_2: |
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173 | mov [IDE_Channel_2],0 |
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174 | ret |
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175 | ;******************************************** |
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1 | ha | 176 | problem_partition db 0 ; used for partitions search |
177 | |||
65 | mario79 | 178 | include 'part_set.inc' |
1 | ha | 179 | |
180 | set_FAT: |
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181 | ;-------------------------------- |
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182 | ; input : EAX = cluster |
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183 | ; EDX = value to save |
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184 | ; output : EDX = old value |
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185 | ;-------------------------------- |
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186 | push eax ebx esi |
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187 | |||
188 | cmp eax,2 |
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189 | jb sfc_error |
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190 | cmp eax,[LAST_CLUSTER] |
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191 | ja sfc_error |
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192 | cmp [fat_type],16 |
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193 | je sfc_1 |
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194 | add eax,eax |
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195 | sfc_1: |
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196 | add eax,eax |
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197 | mov esi,511 |
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198 | and esi,eax ; esi = position in fat sector |
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199 | shr eax,9 ; eax = fat sector |
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200 | add eax,[FAT_START] |
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201 | mov ebx,fat_cache |
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202 | |||
203 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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204 | je sfc_in_cache ; yes |
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205 | |||
206 | cmp [fat_change],0 ; is fat changed? |
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207 | je sfc_no_change ; no |
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208 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 209 | cmp [hd_error],0 |
210 | jne sfc_error |
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1 | ha | 211 | |
212 | sfc_no_change: |
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213 | mov [fat_in_cache],eax ; save fat sector |
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214 | call hd_read |
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74 | mario79 | 215 | cmp [hd_error],0 |
216 | jne sfc_error |
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217 | |||
1 | ha | 218 | |
219 | sfc_in_cache: |
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220 | cmp [fat_type],16 |
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221 | jne sfc_test32 |
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222 | |||
223 | sfc_set16: |
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224 | xchg [ebx+esi],dx ; save new value and get old value |
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225 | jmp sfc_write |
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226 | |||
227 | sfc_test32: |
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228 | mov eax,[fatMASK] |
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229 | |||
230 | sfc_set32: |
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231 | and edx,eax |
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232 | xor eax,-1 ; mask for high bits |
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233 | and eax,[ebx+esi] ; get high 4 bits |
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234 | or eax,edx |
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235 | mov edx,[ebx+esi] ; get old value |
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236 | mov [ebx+esi],eax ; save new value |
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237 | |||
238 | sfc_write: |
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239 | mov [fat_change],1 ; fat has changed |
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240 | |||
241 | sfc_nonzero: |
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242 | and edx,[fatMASK] |
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243 | |||
244 | sfc_error: |
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245 | pop esi ebx eax |
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246 | ret |
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247 | |||
248 | |||
249 | get_FAT: |
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250 | ;-------------------------------- |
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251 | ; input : EAX = cluster |
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252 | ; output : EAX = next cluster |
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253 | ;-------------------------------- |
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254 | push ebx esi |
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255 | |||
256 | cmp [fat_type],16 |
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257 | je gfc_1 |
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258 | add eax,eax |
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259 | gfc_1: |
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260 | add eax,eax |
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261 | mov esi,511 |
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262 | and esi,eax ; esi = position in fat sector |
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263 | shr eax,9 ; eax = fat sector |
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264 | add eax,[FAT_START] |
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265 | mov ebx,fat_cache |
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266 | |||
267 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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268 | je gfc_in_cache |
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269 | |||
270 | cmp [fat_change],0 ; is fat changed? |
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271 | je gfc_no_change ; no |
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272 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 273 | cmp [hd_error],0 |
274 | jne hd_error_01 |
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1 | ha | 275 | |
276 | gfc_no_change: |
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277 | mov [fat_in_cache],eax |
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278 | call hd_read |
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74 | mario79 | 279 | cmp [hd_error],0 |
280 | jne hd_error_01 |
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1 | ha | 281 | |
282 | gfc_in_cache: |
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283 | mov eax,[ebx+esi] |
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284 | and eax,[fatMASK] |
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74 | mario79 | 285 | hd_error_01: |
1 | ha | 286 | pop esi ebx |
287 | ret |
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288 | |||
289 | |||
290 | get_free_FAT: |
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291 | ;----------------------------------------------------------- |
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292 | ; input : EAX = # cluster for start the searching |
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293 | ; output : if CARRY=0 EAX = # first cluster found free |
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294 | ; if CARRY=1 disk full |
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295 | ; Note : for more speed need to use fat_cache directly |
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296 | ;----------------------------------------------------------- |
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297 | push ecx |
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298 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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299 | sub ecx,2 |
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300 | |||
301 | gff_test: |
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302 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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303 | jbe gff_in_range |
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304 | mov eax,2 |
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305 | |||
306 | gff_in_range: |
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307 | push eax |
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308 | call get_FAT ; get cluster state |
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74 | mario79 | 309 | cmp [hd_error],0 |
310 | jne gff_not_found_1 |
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311 | |||
1 | ha | 312 | test eax,eax ; is it free? |
313 | pop eax |
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314 | je gff_found ; yes |
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315 | inc eax ; next cluster |
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316 | dec ecx ; is all checked? |
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317 | jns gff_test ; no |
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318 | |||
74 | mario79 | 319 | gff_not_found_1: |
320 | add esp,4 |
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1 | ha | 321 | gff_not_found: |
322 | pop ecx ; yes. disk is full |
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323 | stc |
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324 | ret |
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325 | |||
326 | gff_found: |
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327 | pop ecx |
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328 | clc |
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329 | ret |
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330 | |||
331 | |||
332 | write_fat_sector: |
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333 | ;----------------------------------------------------------- |
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334 | ; write changed fat to disk |
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335 | ;----------------------------------------------------------- |
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336 | push eax ebx ecx |
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337 | |||
338 | mov [fat_change],0 |
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339 | mov eax,[fat_in_cache] |
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340 | cmp eax,-1 |
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341 | jz write_fat_not_used |
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342 | mov ebx,fat_cache |
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343 | mov ecx,[NUMBER_OF_FATS] |
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344 | |||
345 | write_next_fat: |
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346 | call hd_write |
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74 | mario79 | 347 | cmp [hd_error],0 |
348 | jne write_fat_not_used |
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349 | |||
1 | ha | 350 | add eax,[SECTORS_PER_FAT] |
351 | dec ecx |
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352 | jnz write_next_fat |
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353 | |||
354 | write_fat_not_used: |
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355 | pop ecx ebx eax |
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356 | ret |
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357 | |||
358 | |||
359 | analyze_directory: |
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360 | ;----------------------------------------------------------- |
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361 | ; input : EAX = first cluster of the directory |
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362 | ; EBX = pointer to filename |
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363 | ; output : IF CARRY=0 EAX = sector where th file is found |
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364 | ; EBX = pointer in buffer |
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365 | ; [buffer .. buffer+511] |
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366 | ; ECX,EDX,ESI,EDI not changed |
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367 | ; IF CARRY=1 filename not found |
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368 | ; Note : if cluster=0 it's changed to read rootdir |
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369 | ; save 2 previous directory sectors in longname_sec |
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370 | ;----------------------------------------------------------- |
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371 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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372 | mov [longname_sec1],0 |
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373 | mov [longname_sec2],0 |
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374 | |||
375 | adr_new_cluster: |
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376 | mov [cluster_tmp],eax |
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377 | mov [fat16_root],0 |
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378 | cmp eax,[LAST_CLUSTER] |
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379 | ja adr_not_found ; too big cluster number, something is wrong |
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380 | cmp eax,2 |
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381 | jnb adr_data_cluster |
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382 | |||
383 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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384 | cmp [fat_type],16 |
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385 | jne adr_data_cluster |
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386 | mov eax,[ROOT_START] |
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387 | mov edx,[ROOT_SECTORS] |
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388 | mov [fat16_root],1 ; flag for fat16 rootdir |
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389 | jmp adr_new_sector |
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390 | |||
391 | adr_data_cluster: |
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392 | sub eax,2 |
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393 | mov edx,[SECTORS_PER_CLUSTER] |
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394 | imul eax,edx |
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395 | add eax,[DATA_START] |
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396 | |||
397 | adr_new_sector: |
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398 | mov ebx,buffer |
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399 | call hd_read |
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74 | mario79 | 400 | cmp [hd_error],0 |
401 | jne adr_not_found |
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402 | |||
1 | ha | 403 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
404 | |||
405 | adr_analyze: |
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406 | mov edi,[ebx+11] ; file attribute |
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407 | and edi,0xf |
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408 | cmp edi,0xf |
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409 | je adr_long_filename |
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410 | test edi,0x8 ; skip over volume label |
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411 | jne adr_long_filename ; Note: label can be same name as file/dir |
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412 | |||
413 | mov esi,[esp+0] ; filename need to be uppercase |
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414 | mov edi,ebx |
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415 | push ecx |
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416 | mov ecx,11 |
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417 | cld |
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418 | rep cmpsb ; compare 8+3 filename |
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419 | pop ecx |
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420 | je adr_found |
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421 | |||
422 | adr_long_filename: |
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423 | add ebx,32 ; position of next dir entry |
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424 | dec ecx |
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425 | jnz adr_analyze |
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426 | |||
427 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
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428 | mov [longname_sec1],eax ; for delete long filename |
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429 | mov [longname_sec2],ecx |
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430 | inc eax ; next sector |
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431 | dec edx |
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432 | jne adr_new_sector |
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433 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
434 | je adr_not_found |
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435 | |||
436 | adr_next_cluster: |
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437 | mov eax,[cluster_tmp] |
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438 | call get_FAT ; get next cluster |
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74 | mario79 | 439 | cmp [hd_error],0 |
440 | jne adr_not_found |
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441 | |||
1 | ha | 442 | cmp eax,2 ; incorrect fat chain? |
443 | jb adr_not_found ; yes |
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444 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
445 | jb adr_new_cluster ; no. analyse it |
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446 | |||
447 | adr_not_found: |
||
448 | pop edi edi esi edx ecx ; first edi will remove ebx |
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449 | stc ; file not found |
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450 | ret |
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451 | |||
452 | adr_found: |
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453 | pop edi edi esi edx ecx ; first edi will remove ebx |
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454 | clc ; file found |
||
455 | ret |
||
456 | |||
457 | |||
458 | analyze_directory_to_write: |
||
459 | ;----------------------------------------------------------- |
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460 | ; input : EAX = first cluster of the directory |
||
461 | ; output : IF CARRY=0 EAX = sector where the empty pos is found |
||
462 | ; EBX = pointer in buffer |
||
463 | ; [buffer .. buffer+511] |
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464 | ; ECX,EDX,ESI,EDI not changed |
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465 | ; IF CARRY=1 disk full or fat corrupted |
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466 | ; Note : if cluster=0 it's changed to read rootdir |
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467 | ;----------------------------------------------------------- |
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468 | push ecx edx edi |
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469 | |||
470 | adw_new_cluster: |
||
471 | mov [cluster_tmp],eax |
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472 | mov [fat16_root],0 |
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473 | cmp eax,[LAST_CLUSTER] |
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474 | ja adw_not_found ; too big cluster number, something is wrong |
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475 | cmp eax,2 |
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476 | jnb adw_data_cluster |
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477 | |||
478 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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479 | cmp [fat_type],16 |
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480 | jne adw_data_cluster |
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481 | mov eax,[ROOT_START] |
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482 | mov edx,[ROOT_SECTORS] |
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483 | mov [fat16_root],1 ; flag for fat16 rootdir |
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484 | jmp adw_new_sector |
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485 | |||
486 | adw_data_cluster: |
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487 | sub eax,2 |
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488 | mov edx,[SECTORS_PER_CLUSTER] |
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489 | imul eax,edx |
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490 | add eax,[DATA_START] |
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491 | |||
492 | adw_new_sector: |
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493 | mov ebx,buffer |
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494 | call hd_read |
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74 | mario79 | 495 | cmp [hd_error],0 |
496 | jne adw_not_found |
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497 | |||
1 | ha | 498 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
499 | |||
500 | adw_analyze: |
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501 | cmp byte [ebx],0x00 ; is free entry? |
||
502 | je adw_found ; yes |
||
503 | cmp byte [ebx],0xe5 ; is deleted entry? |
||
504 | je adw_found ; yes |
||
505 | add ebx,32 ; position of next dir entry |
||
506 | dec ecx |
||
507 | jnz adw_analyze |
||
508 | |||
509 | inc eax ; next sector |
||
510 | dec edx |
||
511 | jne adw_new_sector |
||
512 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
513 | je adw_not_found |
||
514 | |||
515 | mov eax,[cluster_tmp] |
||
516 | call get_FAT ; get next cluster |
||
74 | mario79 | 517 | cmp [hd_error],0 |
518 | jne adw_not_found |
||
519 | |||
1 | ha | 520 | cmp eax,2 ; incorrect fat chain? |
521 | jb adw_not_found ; yes |
||
522 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
523 | jb adw_new_cluster ; no. analyse it |
||
524 | |||
525 | mov eax,2 ; this block of code add a new cluster |
||
526 | call get_free_FAT ; for the directory because the directory |
||
527 | jc adw_not_found ; is full |
||
528 | |||
529 | mov edx,[fatEND] ; new end for directory |
||
530 | call set_FAT |
||
74 | mario79 | 531 | cmp [hd_error],0 |
532 | jne adw_not_found |
||
1 | ha | 533 | |
534 | push eax ; save new cluster |
||
535 | mov edx,eax |
||
536 | mov eax,[cluster_tmp] ; change last cluster to point new cluster |
||
537 | call set_FAT |
||
74 | mario79 | 538 | cmp [hd_error],0 |
539 | jne adw_not_found_1 |
||
540 | |||
1 | ha | 541 | mov ecx,-1 ; remove 1 cluster from free disk space |
542 | call add_disk_free_space |
||
74 | mario79 | 543 | cmp [hd_error],0 |
544 | jne adw_not_found_1 |
||
1 | ha | 545 | |
546 | mov ecx,512/4 |
||
547 | xor eax,eax |
||
548 | mov edi,buffer |
||
549 | cld |
||
550 | rep stosd ; clear new directory cluster |
||
551 | pop eax |
||
552 | |||
553 | sub eax,2 |
||
554 | mov ecx,[SECTORS_PER_CLUSTER] |
||
555 | imul eax,ecx |
||
556 | add eax,[DATA_START] |
||
557 | mov ebx,buffer |
||
558 | push eax ; save sector number |
||
559 | |||
560 | adw_set_empty_directory: |
||
561 | call hd_write |
||
74 | mario79 | 562 | cmp [hd_error],0 |
563 | jne adw_not_found_1 |
||
564 | |||
1 | ha | 565 | inc eax ; next sector |
566 | dec ecx |
||
567 | jnz adw_set_empty_directory |
||
568 | |||
569 | pop eax |
||
570 | |||
571 | adw_found: |
||
572 | pop edi edx ecx |
||
573 | clc ; free space found |
||
574 | ret |
||
74 | mario79 | 575 | adw_not_found_1: |
576 | add esp,4 |
||
1 | ha | 577 | adw_not_found: |
578 | pop edi edx ecx |
||
579 | stc ; free space not found |
||
580 | ret |
||
581 | |||
582 | |||
583 | get_data_cluster: |
||
584 | ;----------------------------------------------------------- |
||
585 | ; input : EAX = cluster |
||
586 | ; EBX = pointer to buffer |
||
587 | ; EDX = # blocks to read in buffer |
||
588 | ; ESI = # blocks to skip over |
||
589 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
590 | ; if CARRY=1 cluster out of range |
||
591 | ; Note : if cluster=0 it's changed to read rootdir |
||
592 | ;----------------------------------------------------------- |
||
593 | push eax ecx |
||
594 | |||
595 | mov [fat16_root],0 |
||
596 | cmp eax,[LAST_CLUSTER] |
||
597 | ja gdc_error ; too big cluster number, something is wrong |
||
598 | cmp eax,2 |
||
599 | jnb gdc_cluster |
||
600 | |||
601 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
602 | cmp [fat_type],16 |
||
603 | jne gdc_cluster |
||
604 | mov eax,[ROOT_START] |
||
605 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
606 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
607 | jmp gdc_read |
||
608 | |||
609 | gdc_cluster: |
||
610 | sub eax,2 |
||
611 | mov ecx,[SECTORS_PER_CLUSTER] |
||
612 | imul eax,ecx |
||
613 | add eax,[DATA_START] |
||
614 | |||
615 | gdc_read: |
||
616 | test esi,esi ; first wanted block |
||
617 | je gdcl1 ; yes, skip count is 0 |
||
618 | dec esi |
||
619 | jmp gdcl2 |
||
620 | |||
621 | gdcl1: |
||
622 | call hd_read |
||
74 | mario79 | 623 | cmp [hd_error],0 |
624 | jne gdc_error |
||
625 | |||
1 | ha | 626 | add ebx,512 ; update pointer |
627 | dec edx |
||
628 | |||
629 | gdcl2: |
||
630 | test edx,edx ; is all read? |
||
631 | je out_of_read |
||
632 | |||
633 | inc eax ; next sector |
||
634 | dec ecx |
||
635 | jnz gdc_read |
||
636 | |||
637 | out_of_read: |
||
638 | pop ecx eax |
||
639 | clc |
||
640 | ret |
||
641 | |||
642 | gdc_error: |
||
643 | pop ecx eax |
||
644 | stc |
||
645 | ret |
||
646 | |||
647 | |||
648 | set_data_cluster: |
||
649 | ;----------------------------------------------------------- |
||
650 | ; input : EAX = cluster |
||
651 | ; EBX = pointer to buffer |
||
652 | ; output : if CARRY=0 ok |
||
653 | ; if CARRY=1 cluster out of range |
||
654 | ;----------------------------------------------------------- |
||
655 | push eax ebx edx |
||
656 | |||
657 | cmp eax,[LAST_CLUSTER] |
||
658 | ja sdc_error ; too big cluster number, something is wrong |
||
659 | sub eax,2 |
||
660 | jb sdc_error ; don't allow rootdir write |
||
661 | |||
662 | mov edx,[SECTORS_PER_CLUSTER] |
||
663 | imul eax,edx |
||
664 | add eax,[DATA_START] |
||
665 | |||
666 | sdc_write: |
||
667 | call hd_write |
||
74 | mario79 | 668 | cmp [hd_error],0 |
669 | jne sdc_error |
||
670 | |||
1 | ha | 671 | add ebx,512 ; update pointer |
672 | inc eax |
||
673 | dec edx |
||
674 | jnz sdc_write |
||
675 | pop edx ebx eax |
||
676 | clc |
||
677 | ret |
||
678 | |||
679 | sdc_error: |
||
680 | pop edx ebx eax |
||
681 | stc |
||
682 | ret |
||
683 | |||
684 | |||
685 | get_cluster_of_a_path: |
||
686 | ;--------------------------------------------------------- |
||
687 | ; input : EBX = pointer to a path string |
||
688 | ; (example: the path "/files/data/document" become |
||
689 | ; "files......data.......document...0" |
||
690 | ; '.' = space char |
||
691 | ; '0' = char(0) (ASCII=0) !!! ) |
||
692 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
693 | ; if (CARRY=0) -> EAX=cluster |
||
694 | ;--------------------------------------------------------- |
||
695 | push ebx edx |
||
696 | |||
697 | mov eax,[ROOT_CLUSTER] |
||
698 | mov edx,ebx |
||
699 | |||
700 | search_end_of_path: |
||
701 | cmp byte [edx],0 |
||
702 | je found_end_of_path |
||
703 | |||
704 | inc edx ; '/' |
||
705 | mov ebx,edx |
||
706 | call analyze_directory |
||
707 | jc directory_not_found |
||
708 | |||
709 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
710 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
711 | and eax,[fatMASK] |
||
712 | add edx,11 ; 8+3 (name+extension) |
||
713 | jmp search_end_of_path |
||
714 | |||
715 | found_end_of_path: |
||
716 | pop edx ebx |
||
717 | clc ; no errors |
||
718 | ret |
||
719 | |||
720 | directory_not_found: |
||
721 | pop edx ebx |
||
722 | stc ; errors occour |
||
723 | ret |
||
724 | |||
725 | |||
726 | bcd2bin: |
||
727 | ;---------------------------------- |
||
728 | ; input : AL=BCD number (eg. 0x11) |
||
729 | ; output : AH=0 |
||
730 | ; AL=decimal number (eg. 11) |
||
731 | ;---------------------------------- |
||
732 | xor ah,ah |
||
733 | shl ax,4 |
||
734 | shr al,4 |
||
735 | aad |
||
736 | ret |
||
737 | |||
738 | |||
739 | get_date_for_file: |
||
740 | ;----------------------------------------------------- |
||
741 | ; Get date from CMOS and pack day,month,year in AX |
||
742 | ; DATE bits 0..4 : day of month 0..31 |
||
743 | ; 5..8 : month of year 1..12 |
||
744 | ; 9..15 : count of years from 1980 |
||
745 | ;----------------------------------------------------- |
||
746 | mov al,0x7 ;day |
||
747 | out 0x70,al |
||
748 | in al,0x71 |
||
749 | call bcd2bin |
||
750 | ror eax,5 |
||
751 | |||
752 | mov al,0x8 ;month |
||
753 | out 0x70,al |
||
754 | in al,0x71 |
||
755 | call bcd2bin |
||
756 | ror eax,4 |
||
757 | |||
758 | mov al,0x9 ;year |
||
759 | out 0x70,al |
||
760 | in al,0x71 |
||
761 | call bcd2bin |
||
762 | add ax,20 ;because CMOS return only the two last |
||
763 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
764 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
765 | ret |
||
766 | |||
767 | |||
768 | get_time_for_file: |
||
769 | ;----------------------------------------------------- |
||
770 | ; Get time from CMOS and pack hour,minute,second in AX |
||
771 | ; TIME bits 0..4 : second (the low bit is lost) |
||
772 | ; 5..10 : minute 0..59 |
||
773 | ; 11..15 : hour 0..23 |
||
774 | ;----------------------------------------------------- |
||
775 | mov al,0x0 ;second |
||
776 | out 0x70,al |
||
777 | in al,0x71 |
||
778 | call bcd2bin |
||
779 | ror eax,6 |
||
780 | |||
781 | mov al,0x2 ;minute |
||
782 | out 0x70,al |
||
783 | in al,0x71 |
||
784 | call bcd2bin |
||
785 | ror eax,6 |
||
786 | |||
787 | mov al,0x4 ;hour |
||
788 | out 0x70,al |
||
789 | in al,0x71 |
||
790 | call bcd2bin |
||
791 | rol eax,11 |
||
792 | ret |
||
793 | |||
794 | |||
795 | set_current_time_for_entry: |
||
796 | ;----------------------------------------------------- |
||
797 | ; Set current time/date for file entry |
||
798 | ; input : ebx = file entry pointer |
||
799 | ;----------------------------------------------------- |
||
800 | push eax |
||
801 | call get_time_for_file ; update files date/time |
||
802 | mov [ebx+22],ax |
||
803 | call get_date_for_file |
||
804 | mov [ebx+24],ax |
||
805 | pop eax |
||
806 | ret |
||
807 | |||
808 | |||
809 | makedir: |
||
810 | ;----------------------------------------------------- |
||
811 | ; input : eax = directory name |
||
812 | ; edx = path |
||
813 | ; output : eax = 0 - ok |
||
814 | ; 3 - unknown FS |
||
815 | ; 5 - file not found |
||
816 | ; 8 - disk full |
||
817 | ; 10 - access denied |
||
818 | ; Note : can only make one directory at time |
||
819 | ;----------------------------------------------------- |
||
820 | cmp [fat_type],0 |
||
821 | jnz make_dir_fat_ok |
||
822 | mov eax,ERROR_UNKNOWN_FS |
||
823 | ret |
||
824 | |||
825 | make_dir_fat_ok: |
||
826 | ; call reserve_hd1 |
||
827 | |||
828 | pushad |
||
829 | |||
830 | mov ebx,edx |
||
831 | call get_cluster_of_a_path |
||
832 | jnc make_dir_found_path |
||
74 | mario79 | 833 | cmp [hd_error],0 |
834 | jne make_dir_error_1 |
||
1 | ha | 835 | |
836 | make_dir_path_not_found: |
||
837 | popad |
||
838 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 839 | cmp [hd_error],0 |
840 | jne make_dir_error_2 |
||
841 | |||
1 | ha | 842 | mov [hd1_status],0 |
843 | mov eax,ERROR_FILE_NOT_FOUND |
||
844 | ret |
||
845 | |||
846 | make_dir_disk_full: |
||
74 | mario79 | 847 | cmp [hd_error],0 |
848 | jne make_dir_error_1 |
||
1 | ha | 849 | popad |
850 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 851 | cmp [hd_error],0 |
852 | jne make_dir_error_2 |
||
853 | |||
1 | ha | 854 | mov [hd1_status],0 |
855 | mov eax,ERROR_DISK_FULL |
||
856 | ret |
||
857 | |||
858 | make_dir_already_exist: |
||
74 | mario79 | 859 | cmp [hd_error],0 |
860 | jne make_dir_error_1 |
||
1 | ha | 861 | mov eax,[cluster] ; directory cluster |
862 | xor edx,edx ; free |
||
863 | call set_FAT |
||
74 | mario79 | 864 | cmp [hd_error],0 |
865 | jne make_dir_error_1 |
||
866 | |||
1 | ha | 867 | popad |
868 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 869 | make_dir_error_2: |
1 | ha | 870 | mov [hd1_status],0 |
871 | mov eax,ERROR_ACCESS_DENIED |
||
872 | ret |
||
873 | |||
74 | mario79 | 874 | make_dir_error_1: |
875 | popad |
||
876 | jmp make_dir_error_2 |
||
877 | |||
878 | make_dir_error_3: |
||
879 | add esp,4 |
||
880 | jmp make_dir_error_1 |
||
881 | |||
1 | ha | 882 | make_dir_found_path: |
883 | cmp eax,[ROOT_CLUSTER] |
||
884 | jnz make_dir_not_root |
||
885 | xor eax,eax |
||
886 | |||
887 | make_dir_not_root: |
||
888 | mov ecx,eax ; directorys start cluster |
||
889 | mov word [NewDirEntry2+26],cx ; 16 bits low of cluster |
||
890 | shr ecx,16 |
||
891 | mov word [NewDirEntry2+20],cx ; 16 bits high of cluster (=0 fat16) |
||
892 | |||
893 | push eax ; save parent directory cluster |
||
894 | mov eax,2 |
||
895 | call get_free_FAT |
||
896 | mov [cluster],eax ; first free cluster |
||
897 | pop eax |
||
898 | jc make_dir_disk_full |
||
899 | |||
900 | push eax |
||
901 | mov eax,[cluster] ; directory cluster |
||
902 | mov edx,[fatEND] ; end for directory |
||
903 | call set_FAT |
||
74 | mario79 | 904 | cmp [hd_error],0 |
905 | jne make_dir_error_3 |
||
1 | ha | 906 | pop eax |
907 | |||
908 | mov ebx,PUSHAD_EAX ; dir name |
||
909 | push eax |
||
910 | call analyze_directory ; check if directory already exist |
||
74 | mario79 | 911 | cmp [hd_error],0 |
912 | jne make_dir_error_1 |
||
913 | |||
1 | ha | 914 | pop eax |
915 | jnc make_dir_already_exist ; need to free allocated cluster! |
||
916 | |||
917 | call analyze_directory_to_write |
||
918 | jc make_dir_already_exist ; need to free allocated cluster! |
||
919 | |||
920 | mov esi,PUSHAD_EAX ; dir name |
||
921 | mov edi,ebx ; pointer in buffer |
||
922 | mov ecx,11 |
||
923 | cld |
||
924 | rep movsb |
||
925 | |||
926 | mov dword [ebx+28],0 ; dir size is always 0 |
||
927 | mov ecx,[cluster] |
||
928 | mov [ebx+26],cx ; 16 bits low of cluster |
||
929 | mov word [NewDirEntry1+26],cx |
||
930 | shr ecx,16 |
||
931 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
932 | mov word [NewDirEntry1+20],cx |
||
933 | mov byte [ebx+11],0x10 ; attribute = directory |
||
934 | |||
935 | call set_current_time_for_entry |
||
936 | mov ecx,[ebx+22] |
||
937 | mov dword [NewDirEntry1+22],ecx |
||
938 | mov dword [NewDirEntry2+22],ecx |
||
939 | |||
940 | mov ebx,buffer ; save the directory name,length,cluster |
||
941 | call hd_write |
||
74 | mario79 | 942 | cmp [hd_error],0 |
943 | jne make_dir_error_1 |
||
1 | ha | 944 | |
945 | mov ecx,512/4 |
||
946 | xor eax,eax |
||
947 | mov edi,buffer |
||
948 | cld |
||
949 | rep stosd ; clear new directory cluster |
||
950 | |||
951 | mov eax,[cluster] ; new directory cluster |
||
952 | sub eax,2 |
||
953 | mov edx,[SECTORS_PER_CLUSTER] |
||
954 | imul eax,edx |
||
955 | add eax,[DATA_START] |
||
956 | mov ebx,buffer |
||
957 | add eax,edx ; start from last sector |
||
958 | |||
959 | dir_set_empty_directory: |
||
960 | dec eax ; next sector |
||
961 | cmp edx,1 ; is first directory sector? |
||
962 | jnz not_first_sector ; no. write empty sector |
||
963 | mov esi,NewDirEntry1 |
||
964 | mov edi,buffer |
||
965 | mov ecx,64/4 |
||
966 | cld |
||
967 | rep movsd ; copy 2 first directory entrys "." and ".." |
||
968 | |||
969 | not_first_sector: |
||
970 | call hd_write |
||
74 | mario79 | 971 | cmp [hd_error],0 |
972 | jne make_dir_error_1 |
||
973 | |||
1 | ha | 974 | dec edx |
975 | jnz dir_set_empty_directory |
||
976 | |||
977 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
978 | call add_disk_free_space |
||
74 | mario79 | 979 | cmp [hd_error],0 |
980 | jne make_dir_error_1 |
||
1 | ha | 981 | |
982 | popad |
||
983 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 984 | cmp [hd_error],0 |
985 | jne make_dir_error_2 |
||
1 | ha | 986 | mov [hd1_status],0 |
987 | xor eax,eax |
||
988 | ret |
||
989 | |||
990 | add_disk_free_space: |
||
991 | ;----------------------------------------------------- |
||
992 | ; input : ecx = cluster count |
||
993 | ; Note : negative = remove clusters from free space |
||
994 | ; positive = add clusters to free space |
||
995 | ;----------------------------------------------------- |
||
996 | test ecx,ecx ; no change |
||
997 | je add_dfs_no |
||
998 | cmp [fat_type],32 ; free disk space only used by fat32 |
||
999 | jne add_dfs_no |
||
1000 | |||
1001 | push eax ebx |
||
1002 | mov eax,[ADR_FSINFO] |
||
133 | diamond | 1003 | mov ebx,fsinfo_buffer |
1 | ha | 1004 | call hd_read |
74 | mario79 | 1005 | cmp [hd_error],0 |
1006 | jne add_not_fs |
||
1007 | |||
1 | ha | 1008 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
1009 | jne add_not_fs |
||
1010 | |||
1011 | add [ebx+0x1e8],ecx |
||
1012 | call hd_write |
||
133 | diamond | 1013 | ; cmp [hd_error],0 |
1014 | ; jne add_not_fs |
||
1 | ha | 1015 | |
1016 | add_not_fs: |
||
1017 | pop ebx eax |
||
1018 | |||
1019 | add_dfs_no: |
||
1020 | ret |
||
1021 | |||
1022 | |||
1023 | file_write: |
||
1024 | ;-------------------------------------------------------------------------- |
||
1025 | ; INPUT : user-reg register-in-this meaning symbol-in-this-routine |
||
1026 | ; |
||
1027 | ; EAX EDI system call to write / |
||
1028 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1029 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1030 | ; ECX EBX (PAR2) file size PAR2 |
||
1031 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1032 | ; |
||
1033 | ; output : eax = 0 - ok |
||
1034 | ; 3 - unknown FS |
||
1035 | ; 5 - file not found |
||
1036 | ; 8 - disk full |
||
1037 | ; 10 - access denied |
||
1038 | ;-------------------------------------------------------------------------- |
||
1039 | cmp [fat_type],0 |
||
1040 | jnz fat_ok_for_writing |
||
1041 | mov eax,ERROR_UNKNOWN_FS |
||
1042 | ret |
||
1043 | |||
1044 | fat_ok_for_writing: |
||
1045 | ; call reserve_hd1 |
||
1046 | |||
1047 | pushad |
||
1048 | |||
1049 | xor edi,edi ; don't allow directory remove |
||
1050 | call file_delete ; try to delete the file first |
||
74 | mario79 | 1051 | cmp [hd_error],0 |
1052 | jne exit_write_access_1 |
||
1053 | |||
1 | ha | 1054 | test eax,eax |
1055 | jz old_deleted ; deleted ok |
||
1056 | cmp eax,ERROR_FILE_NOT_FOUND |
||
1057 | jnz exit_write_access ; it exist but can't delete |
||
1058 | |||
1059 | old_deleted: |
||
1060 | mov ebx,PUSHAD_EDX |
||
1061 | call get_cluster_of_a_path |
||
1062 | jnc found_directory_for_writing |
||
74 | mario79 | 1063 | cmp [hd_error],0 |
1064 | jne exit_write_access |
||
1 | ha | 1065 | |
1066 | exit_writing_with_error: |
||
1067 | popad |
||
1068 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1069 | cmp [hd_error],0 |
1070 | jne exit_write_access_2 |
||
1071 | |||
1 | ha | 1072 | mov [hd1_status],0 |
1073 | mov eax,ERROR_FILE_NOT_FOUND |
||
1074 | ret |
||
1075 | |||
1076 | exit_writing_disk_full_clear: |
||
74 | mario79 | 1077 | cmp [hd_error],0 |
1078 | jne exit_write_access_1 |
||
1 | ha | 1079 | mov eax,[sector_tmp] |
1080 | mov ebx,buffer |
||
1081 | call hd_read ; read directory sector |
||
74 | mario79 | 1082 | cmp [hd_error],0 |
1083 | jne exit_write_access_1 |
||
1084 | |||
1 | ha | 1085 | mov edx,[entry_pos] |
1086 | mov byte [edx],0xe5 ; mark as deleted |
||
1087 | call hd_write |
||
74 | mario79 | 1088 | cmp [hd_error],0 |
1089 | jne exit_write_access_1 |
||
1090 | |||
1 | ha | 1091 | mov eax,[edx+20-2] ; FAT entry |
1092 | mov ax,[edx+26] |
||
1093 | and eax,[fatMASK] |
||
1094 | call clear_cluster_chain |
||
1095 | |||
1096 | exit_writing_disk_full: |
||
74 | mario79 | 1097 | cmp [hd_error],0 |
1098 | jne exit_write_access_1 |
||
1 | ha | 1099 | popad |
1100 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1101 | cmp [hd_error],0 |
1102 | jne exit_write_access_2 |
||
1 | ha | 1103 | mov [hd1_status],0 |
1104 | mov eax,ERROR_DISK_FULL |
||
1105 | ret |
||
1106 | |||
1107 | exit_write_access: |
||
1108 | popad |
||
1109 | call update_disk ; write all of cache and fat to hd |
||
1110 | mov [hd1_status],0 |
||
1111 | mov eax,ERROR_ACCESS_DENIED |
||
1112 | ret |
||
1113 | |||
74 | mario79 | 1114 | exit_write_access_1: |
1115 | popad |
||
1116 | exit_write_access_2: |
||
1117 | mov [hd1_status],0 |
||
1118 | mov eax,ERROR_ACCESS_DENIED |
||
1119 | ret |
||
1120 | |||
1 | ha | 1121 | found_directory_for_writing: |
1122 | call analyze_directory_to_write |
||
1123 | jc exit_writing_disk_full |
||
1124 | |||
1125 | mov [sector_tmp],eax |
||
1126 | mov [entry_pos],ebx |
||
1127 | push eax ; save directory sector |
||
1128 | mov eax,2 |
||
1129 | call get_free_FAT |
||
1130 | mov [cluster],eax ; first free cluster |
||
1131 | pop eax |
||
1132 | jc exit_writing_disk_full |
||
1133 | |||
1134 | mov esi,PUSHAD_EAX ; file name |
||
1135 | mov edi,ebx ; pointer in buffer |
||
1136 | mov ecx,11 |
||
1137 | cld |
||
1138 | rep movsb |
||
1139 | |||
1140 | mov esi,PUSHAD_EBX ; file size (bytes left) |
||
1141 | mov [ebx+28],esi ; file size |
||
1142 | mov ecx,[cluster] |
||
1143 | mov [ebx+26],cx ; 16 bits low of cluster |
||
1144 | shr ecx,16 |
||
1145 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
1146 | mov byte [ebx+11],0x20 ; attribute = archive |
||
1147 | |||
1148 | call set_current_time_for_entry |
||
1149 | |||
1150 | mov ebx,buffer ; save the directory name,length,cluster |
||
1151 | call hd_write |
||
74 | mario79 | 1152 | cmp [hd_error],0 |
1153 | jne exit_write_access_1 |
||
1 | ha | 1154 | |
1155 | imul edi,[SECTORS_PER_CLUSTER],512 ; edi = cluster size in bytes |
||
1156 | xor ecx,ecx ; cluster count |
||
1157 | mov ebx,PUSHAD_ECX ; ebx = buffer |
||
1158 | |||
1159 | hd_new_block_write: |
||
1160 | |||
1161 | mov eax,[cluster] ; eax = block |
||
1162 | call set_data_cluster |
||
74 | mario79 | 1163 | cmp [hd_error],0 |
1164 | jne exit_write_access_1 |
||
1 | ha | 1165 | |
1166 | sub esi,edi ; sub wrote bytes |
||
1167 | jbe file_saved_OK ; end if all done |
||
1168 | add ebx,edi ; update buffer position |
||
1169 | |||
1170 | inc eax |
||
1171 | call get_free_FAT ; next free in FAT |
||
1172 | jc exit_writing_disk_full_clear |
||
1173 | |||
1174 | mov edx,eax |
||
1175 | xchg eax,[cluster] ; get old cluster and save new cluster |
||
1176 | call set_FAT ; add it in cluster chain |
||
74 | mario79 | 1177 | cmp [hd_error],0 |
1178 | jne exit_write_access_1 |
||
1179 | |||
1 | ha | 1180 | dec ecx ; update cluster count |
1181 | jmp hd_new_block_write |
||
1182 | |||
1183 | file_saved_OK: |
||
1184 | |||
1185 | mov edx,[fatEND] ; new end for cluster chain |
||
1186 | call set_FAT |
||
74 | mario79 | 1187 | cmp [hd_error],0 |
1188 | jne exit_write_access_1 |
||
1189 | |||
1 | ha | 1190 | dec ecx ; update cluster count |
1191 | |||
1192 | call add_disk_free_space ; remove clusters from free disk space |
||
74 | mario79 | 1193 | cmp [hd_error],0 |
1194 | jne exit_write_access_1 |
||
1 | ha | 1195 | |
1196 | popad |
||
1197 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1198 | cmp [hd_error],0 |
1199 | jne exit_write_access_2 |
||
1 | ha | 1200 | mov [hd1_status],0 |
1201 | xor eax,eax |
||
1202 | ret |
||
1203 | |||
1204 | |||
1205 | file_read: |
||
1206 | ;-------------------------------------------------------------------------- |
||
1207 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
1208 | ; |
||
1209 | ; EAX EDI system call to write / |
||
1210 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1211 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1212 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
1213 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1214 | ; EDI ESI vt first 512 block to read |
||
1215 | ; EDI if 0 - read root |
||
1216 | ; |
||
1217 | ; output : eax = 0 - ok |
||
1218 | ; 3 - unknown FS |
||
1219 | ; 5 - file not found |
||
1220 | ; 6 - end of file |
||
1221 | ; 9 - fat table corrupted |
||
74 | mario79 | 1222 | ; 10 - access denied |
1 | ha | 1223 | ; ebx = size of file/directory |
1224 | ;-------------------------------------------------------------------------- |
||
1225 | cmp [fat_type],0 |
||
1226 | jnz fat_ok_for_reading |
||
1227 | xor ebx,ebx |
||
1228 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 1229 | mov [hd1_status], ebx |
1 | ha | 1230 | ret |
1231 | |||
1232 | fat_ok_for_reading: |
||
1233 | ; call reserve_hd1 |
||
1234 | |||
1235 | pushad |
||
1236 | |||
1237 | mov ebx,edx |
||
1238 | call get_cluster_of_a_path |
||
1239 | jc file_to_read_not_found |
||
1240 | |||
1241 | test edi,edi ; read rootdir |
||
1242 | jne no_read_root |
||
1243 | |||
1244 | xor eax,eax |
||
1245 | call get_dir_size ; return rootdir size |
||
74 | mario79 | 1246 | cmp [hd_error],0 |
1247 | jne file_access_denied |
||
1248 | |||
1 | ha | 1249 | mov [file_size],eax |
1250 | mov eax,[ROOT_CLUSTER] |
||
1251 | jmp file_read_start |
||
1252 | |||
1253 | no_read_root: |
||
1254 | mov ebx,PUSHAD_EAX ; file name |
||
1255 | call analyze_directory |
||
1256 | jc file_to_read_not_found |
||
1257 | |||
1258 | mov eax,[ebx+28] ; file size |
||
1259 | test byte [ebx+11],0x10 ; is it directory? |
||
1260 | jz read_set_size ; no |
||
1261 | |||
1262 | mov eax,[ebx+20-2] ; FAT entry |
||
1263 | mov ax,[ebx+26] |
||
1264 | and eax,[fatMASK] |
||
1265 | call get_dir_size |
||
74 | mario79 | 1266 | cmp [hd_error],0 |
1267 | jne file_access_denied |
||
1 | ha | 1268 | |
1269 | read_set_size: |
||
1270 | mov [file_size],eax |
||
1271 | |||
1272 | mov eax,[ebx+20-2] ; FAT entry |
||
1273 | mov ax,[ebx+26] |
||
1274 | and eax,[fatMASK] |
||
1275 | |||
1276 | file_read_start: |
||
1277 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
1278 | mov edx,PUSHAD_EBX ; file blocks to read |
||
1279 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
1280 | |||
1281 | file_read_new_cluster: |
||
1282 | call get_data_cluster |
||
1283 | jc file_read_eof ; end of file or cluster out of range |
||
1284 | |||
1285 | test edx,edx ; is all read? |
||
1286 | je file_read_OK ; yes |
||
1287 | |||
1288 | call get_FAT ; get next cluster |
||
74 | mario79 | 1289 | cmp [hd_error],0 |
1290 | jne file_access_denied |
||
1291 | |||
1 | ha | 1292 | cmp eax,[fatRESERVED] ; end of file |
1293 | jnb file_read_eof |
||
1294 | cmp eax,2 ; incorrect fat chain |
||
1295 | jnb file_read_new_cluster |
||
1296 | |||
1297 | popad |
||
1298 | mov [hd1_status],0 |
||
1299 | mov ebx,[file_size] |
||
1300 | mov eax,ERROR_FAT_TABLE |
||
1301 | ret |
||
1302 | |||
1303 | file_read_eof: |
||
74 | mario79 | 1304 | cmp [hd_error],0 |
1305 | jne file_access_denied |
||
1 | ha | 1306 | popad |
1307 | mov [hd1_status],0 |
||
1308 | mov ebx,[file_size] |
||
1309 | mov eax,ERROR_END_OF_FILE |
||
1310 | ret |
||
1311 | |||
1312 | file_read_OK: |
||
1313 | popad |
||
1314 | mov [hd1_status],0 |
||
1315 | mov ebx,[file_size] |
||
1316 | xor eax,eax |
||
1317 | ret |
||
1318 | |||
1319 | file_to_read_not_found: |
||
74 | mario79 | 1320 | cmp [hd_error],0 |
1321 | jne file_access_denied |
||
1 | ha | 1322 | popad |
1323 | mov [hd1_status],0 |
||
1324 | xor ebx,ebx |
||
1325 | mov eax,ERROR_FILE_NOT_FOUND |
||
1326 | ret |
||
1327 | |||
74 | mario79 | 1328 | file_access_denied: |
1329 | popad |
||
1330 | mov [hd1_status],0 |
||
1331 | xor ebx,ebx |
||
1332 | mov eax,ERROR_ACCESS_DENIED |
||
1333 | ret |
||
1 | ha | 1334 | |
1335 | get_dir_size: |
||
1336 | ;----------------------------------------------------- |
||
1337 | ; input : eax = first cluster (0=rootdir) |
||
1338 | ; output : eax = directory size in bytes |
||
1339 | ;----------------------------------------------------- |
||
1340 | push edx |
||
1341 | xor edx,edx ; count of directory clusters |
||
1342 | test eax,eax |
||
1343 | jnz dir_size_next |
||
1344 | |||
1345 | mov eax,[ROOT_SECTORS] |
||
1346 | shl eax,9 ; fat16 rootdir size in bytes |
||
1347 | cmp [fat_type],16 |
||
1348 | je dir_size_ret |
||
1349 | mov eax,[ROOT_CLUSTER] |
||
1350 | |||
1351 | dir_size_next: |
||
1352 | cmp eax,2 ; incorrect fat chain |
||
1353 | jb dir_size_end |
||
1354 | cmp eax,[fatRESERVED] ; end of directory |
||
1355 | ja dir_size_end |
||
1356 | call get_FAT ; get next cluster |
||
74 | mario79 | 1357 | cmp [hd_error],0 |
1358 | jne dir_size_ret |
||
1359 | |||
1 | ha | 1360 | inc edx |
1361 | jmp dir_size_next |
||
1362 | |||
1363 | dir_size_end: |
||
1364 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1365 | imul eax,edx |
||
1366 | |||
1367 | dir_size_ret: |
||
1368 | pop edx |
||
1369 | ret |
||
1370 | |||
1371 | |||
1372 | file_delete: |
||
1373 | ;----------------------------------------------------- |
||
1374 | ; input : eax = file/directory name |
||
1375 | ; edx = path |
||
1376 | ; edi = 1 - allow directory remove else don't remove directory |
||
1377 | ; output : eax = 0 - ok |
||
1378 | ; 3 - unknown FS |
||
1379 | ; 5 - file not found |
||
1380 | ; 10 - access denied |
||
1381 | ;----------------------------------------------------- |
||
1382 | cmp [fat_type],0 |
||
1383 | jnz file_del_fat_ok |
||
1384 | mov eax,ERROR_UNKNOWN_FS |
||
1385 | ret |
||
1386 | |||
1387 | file_del_fat_ok: |
||
1388 | pushad |
||
1389 | |||
1390 | mov ebx,edx |
||
1391 | call get_cluster_of_a_path |
||
1392 | jc file_to_delete_not_found |
||
1393 | |||
1394 | mov ebx,PUSHAD_EAX ; file/directory name |
||
1395 | call analyze_directory |
||
1396 | jc file_to_delete_not_found |
||
1397 | |||
1398 | test byte [ebx+11],0x10 ; is it directory? |
||
1399 | jz delete_notdir ; no. it's file |
||
1400 | cmp edi,1 ; allow directory remove |
||
1401 | jnz delete_no_access ; no |
||
1402 | |||
1403 | push eax ; save directory sector |
||
1404 | mov eax,[ebx+20-2] ; first cluster of file |
||
1405 | mov ax,[ebx+26] ; 0 length files start cluster = 0 |
||
1406 | and eax,[fatMASK] |
||
1407 | xor ebp,ebp ; counter for directory deepnes |
||
1408 | call clear_directory |
||
1409 | pop eax |
||
1410 | jc delete_no_access |
||
1411 | |||
1412 | push ebx ; save directory pointer in buffer |
||
1413 | mov ebx,buffer |
||
1414 | call hd_read ; read directory sector |
||
74 | mario79 | 1415 | cmp [hd_error],0 |
1416 | jne delete_no_access_1 |
||
1 | ha | 1417 | pop ebx |
1418 | |||
1419 | delete_notdir: |
||
1420 | call delete_entry_name |
||
74 | mario79 | 1421 | cmp [hd_error],0 |
1422 | jne delete_no_access |
||
1423 | |||
1 | ha | 1424 | mov eax,ecx ; first cluster of file |
1425 | call clear_cluster_chain |
||
74 | mario79 | 1426 | cmp [hd_error],0 |
1427 | jne delete_no_access |
||
1428 | |||
1 | ha | 1429 | popad |
1430 | xor eax,eax |
||
1431 | ret |
||
1432 | |||
74 | mario79 | 1433 | delete_no_access_1: |
1434 | add esp,4 |
||
1 | ha | 1435 | delete_no_access: |
1436 | popad |
||
1437 | mov eax,ERROR_ACCESS_DENIED |
||
1438 | ret |
||
1439 | |||
1440 | file_to_delete_not_found: |
||
74 | mario79 | 1441 | cmp [hd_error],0 |
1442 | jne delete_no_access |
||
1 | ha | 1443 | popad |
1444 | mov eax,ERROR_FILE_NOT_FOUND |
||
1445 | ret |
||
1446 | |||
1447 | |||
1448 | clear_cluster_chain: |
||
1449 | ;----------------------------------------------------- |
||
1450 | ; input : eax = first cluster |
||
1451 | ;----------------------------------------------------- |
||
1452 | push eax ecx edx |
||
1453 | xor ecx,ecx ; cluster count |
||
1454 | |||
1455 | clean_new_chain: |
||
1456 | cmp eax,[LAST_CLUSTER] ; end of file |
||
1457 | ja delete_OK |
||
1458 | cmp eax,2 ; unfinished fat chain or zero length file |
||
1459 | jb delete_OK |
||
1460 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1461 | jz delete_OK |
||
1462 | |||
1463 | xor edx,edx |
||
1464 | call set_FAT ; clear fat entry |
||
74 | mario79 | 1465 | cmp [hd_error],0 |
1466 | jne access_denied_01 |
||
1467 | |||
1 | ha | 1468 | inc ecx ; update cluster count |
1469 | mov eax,edx ; old cluster |
||
1470 | jmp clean_new_chain |
||
1471 | |||
1472 | delete_OK: |
||
1473 | call add_disk_free_space ; add clusters to free disk space |
||
74 | mario79 | 1474 | access_denied_01: |
1 | ha | 1475 | pop edx ecx eax |
1476 | ret |
||
1477 | |||
1478 | |||
1479 | clear_directory: |
||
1480 | ;----------------------------------------------------- |
||
1481 | ; input : eax = directory cluster |
||
1482 | ; ebp = directory deepnes |
||
1483 | ; Note : use recursive call |
||
1484 | ;----------------------------------------------------- |
||
1485 | pushad |
||
1486 | inc ebp |
||
1487 | cmp ebp,64 ; if over 63 directory deep |
||
1488 | jnb clear_error ; something must be wrong |
||
1489 | |||
1490 | clear_new_cluster: |
||
1491 | cmp eax,[LAST_CLUSTER] |
||
1492 | ja clear_end |
||
1493 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1494 | jz clear_end |
||
1495 | mov esi,eax ; esi = current directory cluster |
||
1496 | sub eax,2 |
||
1497 | jb clear_end |
||
1498 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1499 | imul eax,ecx |
||
1500 | add eax,[DATA_START] |
||
1501 | |||
1502 | clear_new_sector: |
||
1503 | mov edi,eax ; edi = current directory sector |
||
1504 | mov ebx,deltree_buffer |
||
1505 | call hd_read |
||
74 | mario79 | 1506 | cmp [hd_error],0 |
1507 | jne clear_error |
||
1508 | |||
1 | ha | 1509 | mov edx,512/32 ; count of dir entrys per sector = 16 |
1510 | |||
1511 | clear_analyze: |
||
1512 | mov al,[ebx+11] ; file attribute |
||
1513 | and al,0xf |
||
1514 | cmp al,0xf |
||
1515 | je clear_long_filename |
||
1516 | |||
1517 | cmp byte [ebx],'.' ; parent or current directory |
||
1518 | je clear_next_entry |
||
1519 | cmp byte [ebx],0xe5 ; deleted |
||
1520 | je clear_next_entry |
||
1521 | cmp byte [ebx],0 ; empty |
||
1522 | je clear_write_last |
||
1523 | ;je clear_next_entry |
||
1524 | |||
1525 | mov eax,[ebx+20-2] ; first cluster of entry |
||
1526 | mov ax,[ebx+26] |
||
1527 | and eax,[fatMASK] |
||
1528 | |||
1529 | test byte [ebx+11],0x10 ; is it directory? |
||
1530 | jz clear_file ; no |
||
1531 | |||
1532 | push eax ebx |
||
1533 | mov eax,edi |
||
1534 | mov ebx,deltree_buffer ; save buffer over recursive call |
||
1535 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1536 | cmp [hd_error],0 |
1537 | jne clear_error |
||
1538 | |||
1 | ha | 1539 | pop ebx eax |
1540 | |||
1541 | call clear_directory ; recursive call !!! |
||
1542 | jc clear_error ; exit if error found |
||
1543 | |||
1544 | push eax ebx |
||
1545 | mov eax,edi |
||
1546 | mov ebx,deltree_buffer |
||
1547 | call hd_read ; read directory sector again |
||
74 | mario79 | 1548 | cmp [hd_error],0 |
1549 | jne clear_error_1 |
||
1550 | |||
1 | ha | 1551 | pop ebx eax |
1552 | |||
1553 | clear_file: |
||
1554 | call clear_cluster_chain |
||
74 | mario79 | 1555 | cmp [hd_error],0 |
1556 | jne clear_error |
||
1 | ha | 1557 | |
1558 | clear_long_filename: |
||
1559 | mov byte [ebx],0xe5 |
||
1560 | |||
1561 | clear_next_entry: |
||
1562 | add ebx,32 ; position of next dir entry |
||
1563 | dec edx |
||
1564 | jnz clear_analyze |
||
1565 | |||
1566 | mov eax,edi |
||
1567 | mov ebx,deltree_buffer |
||
1568 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1569 | cmp [hd_error],0 |
1570 | jne clear_error |
||
1 | ha | 1571 | |
1572 | inc eax ; next sector |
||
1573 | dec ecx |
||
1574 | jnz clear_new_sector |
||
1575 | |||
1576 | mov eax,esi |
||
1577 | call get_FAT ; get next cluster |
||
74 | mario79 | 1578 | cmp [hd_error],0 |
1579 | jne clear_error |
||
1580 | |||
1 | ha | 1581 | jmp clear_new_cluster ; clear it |
1582 | |||
1583 | clear_write_last: |
||
1584 | mov eax,edi |
||
1585 | mov ebx,deltree_buffer |
||
1586 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1587 | cmp [hd_error],0 |
1588 | jne clear_error |
||
1 | ha | 1589 | |
1590 | clear_end: |
||
1591 | popad |
||
1592 | clc |
||
1593 | ret |
||
74 | mario79 | 1594 | clear_error_1: |
1595 | add esp,8 |
||
1 | ha | 1596 | clear_error: |
1597 | popad |
||
1598 | stc |
||
1599 | ret |
||
1600 | |||
1601 | |||
1602 | delete_entry_name: |
||
1603 | ;----------------------------------------------------- |
||
1604 | ; input : eax = directory sector |
||
1605 | ; ebx = directory pointer in buffer |
||
1606 | ; longname_sec = 2 previous directory sectors |
||
1607 | ; output : ecx = first cluster |
||
1608 | ; change : eax,ebx,edx |
||
1609 | ;----------------------------------------------------- |
||
1610 | mov byte [ebx],0xe5 |
||
1611 | mov ecx,[ebx+20-2] ; first cluster of file |
||
1612 | mov cx,[ebx+26] ; 0 length files start cluster = 0 |
||
1613 | and ecx,[fatMASK] |
||
1614 | |||
1615 | delete_empty: |
||
1616 | sub ebx,32 |
||
1617 | cmp ebx,buffer |
||
1618 | jnb delete_test_long |
||
1619 | |||
1620 | mov ebx,buffer |
||
1621 | call hd_write ; write directory sector back |
||
74 | mario79 | 1622 | cmp [hd_error],0 |
1623 | jne delete_name_end |
||
1624 | |||
1 | ha | 1625 | xor eax,eax |
1626 | xchg eax,[longname_sec2] |
||
1627 | xchg eax,[longname_sec1] |
||
1628 | test eax,eax ; is there previous directory sector? |
||
1629 | jz delete_name_end ; no |
||
1630 | |||
1631 | mov ebx,buffer |
||
1632 | call hd_read ; read previous sector |
||
74 | mario79 | 1633 | cmp [hd_error],0 |
1634 | jne delete_name_end |
||
1635 | |||
1 | ha | 1636 | mov ebx,buffer+0x1e0 ; start from last entry |
1637 | |||
1638 | delete_test_long: |
||
1639 | mov dh,[ebx+11] ; file attribute |
||
1640 | and dh,0xf |
||
1641 | cmp dh,0xf |
||
1642 | jne delete_write_buffer |
||
1643 | |||
1644 | cmp byte [ebx],0x40 ; end of long dir entry? |
||
1645 | mov byte [ebx],0xe5 |
||
1646 | jb delete_empty |
||
1647 | |||
1648 | delete_write_buffer: |
||
1649 | mov ebx,buffer |
||
1650 | call hd_write ; write directory sector back |
||
1651 | |||
1652 | delete_name_end: |
||
1653 | ret |
||
1654 | |||
1655 | |||
1656 | rename: |
||
1657 | ;----------------------------------------------------------- |
||
1658 | ; input : eax = source directory name |
||
1659 | ; edx = source path |
||
1660 | ; ebx = dest directory name |
||
1661 | ; edi = dest path |
||
1662 | ; output : eax = 0 - ok |
||
1663 | ; 3 - unknown FS |
||
1664 | ; 5 - file not found |
||
1665 | ; 8 - disk full |
||
1666 | ; 10 - access denied |
||
1667 | ;----------------------------------------------------------- |
||
1668 | cmp [fat_type],0 |
||
1669 | jnz fat_ok_for_rename |
||
1670 | mov eax,ERROR_UNKNOWN_FS |
||
1671 | ret |
||
1672 | |||
1673 | fat_ok_for_rename: |
||
1674 | ; call reserve_hd1 |
||
1675 | |||
1676 | pushad |
||
1677 | |||
1678 | mov ebx,edx ; source path |
||
1679 | call get_cluster_of_a_path |
||
1680 | jc rename_entry_not_found |
||
1681 | |||
1682 | mov ebx,PUSHAD_EAX ; source directory name |
||
1683 | call analyze_directory |
||
1684 | jc rename_entry_not_found |
||
1685 | |||
1686 | mov [sector_tmp],eax ; save source sector |
||
1687 | mov [entry_pos],ebx |
||
1688 | mov esi,ebx |
||
1689 | mov edi,dir_entry |
||
1690 | mov ecx,32/4 |
||
1691 | cld |
||
1692 | rep movsd ; save entry |
||
1693 | |||
1694 | mov ebx,PUSHAD_EDI ; dest path |
||
1695 | call get_cluster_of_a_path |
||
1696 | jc rename_entry_not_found |
||
1697 | |||
1698 | mov edx,eax ; save dest directory cluster |
||
1699 | mov ebx,PUSHAD_EBX ; dest directory name |
||
1700 | push [longname_sec1] |
||
1701 | push [longname_sec2] |
||
1702 | call analyze_directory ; check if entry already exist |
||
74 | mario79 | 1703 | cmp [hd_error],0 |
1704 | jne rename_entry_already_exist_1 |
||
1705 | |||
1 | ha | 1706 | pop [longname_sec2] |
1707 | pop [longname_sec1] |
||
1708 | jnc rename_entry_already_exist |
||
1709 | |||
1710 | mov eax,edx |
||
1711 | call analyze_directory_to_write |
||
1712 | jc rename_disk_full |
||
1713 | |||
1714 | mov esi,dir_entry |
||
1715 | mov edi,ebx |
||
1716 | mov ecx,32/4 |
||
1717 | cld |
||
1718 | rep movsd ; copy entry |
||
1719 | mov esi,PUSHAD_EBX ; dest directory name |
||
1720 | mov edi,ebx |
||
1721 | mov ecx,11 |
||
1722 | rep movsb ; copy name |
||
1723 | |||
1724 | mov ebx,buffer ; save the directory name,length,cluster |
||
1725 | call hd_write |
||
1726 | |||
1727 | test byte [dir_entry+11],0x10 ; is it directory? |
||
1728 | jz rename_not_dir ; no |
||
1729 | mov eax,[dir_entry+20-2] ; FAT entry |
||
1730 | mov ax,[dir_entry+26] |
||
1731 | and eax,[fatMASK] |
||
1732 | call change_2dot_cluster |
||
74 | mario79 | 1733 | cmp [hd_error],0 |
1734 | jne rename_entry_already_exist |
||
1 | ha | 1735 | |
1736 | rename_not_dir: |
||
74 | mario79 | 1737 | cmp [hd_error],0 |
1738 | jne rename_entry_already_exist |
||
1 | ha | 1739 | mov eax,[sector_tmp] |
1740 | mov ebx,buffer |
||
1741 | call hd_read ; read source directory sector |
||
74 | mario79 | 1742 | cmp [hd_error],0 |
1743 | jne rename_entry_already_exist |
||
1 | ha | 1744 | |
1745 | mov ebx,[entry_pos] |
||
1746 | call delete_entry_name |
||
74 | mario79 | 1747 | cmp [hd_error],0 |
1748 | jne rename_entry_already_exist |
||
1 | ha | 1749 | |
1750 | popad |
||
1751 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1752 | cmp [hd_error],0 |
1753 | jne rename_entry_already_exist_2 |
||
1 | ha | 1754 | mov [hd1_status],0 |
1755 | xor eax,eax |
||
1756 | ret |
||
1757 | |||
1758 | rename_entry_not_found: |
||
74 | mario79 | 1759 | cmp [hd_error],0 |
1760 | jne rename_entry_already_exist |
||
1 | ha | 1761 | popad |
1762 | mov [hd1_status],0 |
||
1763 | mov eax,ERROR_FILE_NOT_FOUND |
||
1764 | ret |
||
1765 | |||
74 | mario79 | 1766 | rename_entry_already_exist_1: |
1767 | add esp,8 |
||
1 | ha | 1768 | rename_entry_already_exist: |
1769 | popad |
||
74 | mario79 | 1770 | rename_entry_already_exist_2: |
1 | ha | 1771 | mov [hd1_status],0 |
1772 | mov eax,ERROR_ACCESS_DENIED |
||
1773 | ret |
||
1774 | |||
1775 | rename_disk_full: |
||
74 | mario79 | 1776 | cmp [hd_error],0 |
1777 | jne rename_entry_already_exist |
||
1 | ha | 1778 | popad |
1779 | mov [hd1_status],0 |
||
1780 | mov eax,ERROR_DISK_FULL |
||
1781 | ret |
||
1782 | |||
1783 | |||
1784 | change_2dot_cluster: |
||
1785 | ;----------------------------------------------------------- |
||
1786 | ; input : eax = directory cluster |
||
1787 | ; edx = value to save |
||
1788 | ; change : eax,ebx,edx |
||
1789 | ;----------------------------------------------------------- |
||
1790 | cmp eax,[LAST_CLUSTER] |
||
1791 | ja not_2dot ; too big cluster number, something is wrong |
||
1792 | sub eax,2 |
||
1793 | jb not_2dot |
||
1794 | |||
1795 | imul eax,[SECTORS_PER_CLUSTER] |
||
1796 | add eax,[DATA_START] |
||
1797 | mov ebx,buffer |
||
1798 | call hd_read |
||
74 | mario79 | 1799 | cmp [hd_error],0 |
1800 | jne not_2dot |
||
1 | ha | 1801 | |
1802 | cmp dword [ebx+32],'.. ' |
||
1803 | jnz not_2dot |
||
1804 | |||
1805 | cmp edx,[ROOT_CLUSTER] ; is rootdir cluster? |
||
1806 | jne not_2dot_root |
||
1807 | xor edx,edx ; yes. set it zero |
||
1808 | |||
1809 | not_2dot_root: |
||
1810 | mov [ebx+32+26],dx ; 16 bits low of cluster |
||
1811 | shr edx,16 |
||
1812 | mov [ebx+32+20],dx ; 16 bits high of cluster (=0 fat16) |
||
1813 | call hd_write |
||
1814 | |||
1815 | not_2dot: |
||
1816 | ret |
||
1817 | |||
1818 | |||
1819 | get_hd_info: |
||
1820 | ;----------------------------------------------------------- |
||
1821 | ; output : eax = 0 - ok |
||
1822 | ; 3 - unknown FS |
||
74 | mario79 | 1823 | ; 10 - access denied |
1 | ha | 1824 | ; edx = cluster size in bytes |
1825 | ; ebx = total clusters on disk |
||
1826 | ; ecx = free clusters on disk |
||
1827 | ;----------------------------------------------------------- |
||
1828 | cmp [fat_type],0 |
||
1829 | jnz info_fat_ok |
||
1830 | xor edx,edx |
||
1831 | xor ebx,ebx |
||
1832 | xor ecx,ecx |
||
1833 | mov eax,ERROR_UNKNOWN_FS |
||
1834 | ret |
||
1835 | |||
1836 | info_fat_ok: |
||
1837 | ; call reserve_hd1 |
||
1838 | |||
1839 | xor ecx,ecx ; count of free clusters |
||
1840 | mov eax,2 |
||
1841 | mov ebx,[LAST_CLUSTER] |
||
1842 | |||
1843 | info_cluster: |
||
1844 | push eax |
||
1845 | call get_FAT ; get cluster info |
||
74 | mario79 | 1846 | cmp [hd_error],0 |
1847 | jne info_access_denied |
||
1848 | |||
1 | ha | 1849 | test eax,eax ; is it free? |
1850 | jnz info_used ; no |
||
1851 | inc ecx |
||
1852 | |||
1853 | info_used: |
||
1854 | pop eax |
||
1855 | inc eax |
||
1856 | cmp eax,ebx ; is above last cluster? |
||
1857 | jbe info_cluster ; no. test next cluster |
||
1858 | |||
1859 | dec ebx ; cluster count |
||
1860 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1861 | mov [hd1_status],0 |
||
1862 | xor eax,eax |
||
1863 | ret |
||
1864 | |||
74 | mario79 | 1865 | info_access_denied: |
1866 | add esp,4 |
||
1867 | xor edx,edx |
||
1868 | xor ebx,ebx |
||
1869 | xor ecx,ecx |
||
1870 | mov eax,ERROR_ACCESS_DENIED |
||
1871 | ret |
||
1 | ha | 1872 | |
1873 | update_disk: |
||
1874 | ;----------------------------------------------------------- |
||
1875 | ; write changed fat and cache to disk |
||
1876 | ;----------------------------------------------------------- |
||
1877 | cmp [fat_change],0 ; is fat changed? |
||
1878 | je upd_no_change |
||
1879 | |||
1880 | call write_fat_sector |
||
74 | mario79 | 1881 | cmp [hd_error],0 |
1882 | jne update_disk_acces_denied |
||
1 | ha | 1883 | |
1884 | upd_no_change: |
||
1885 | |||
1886 | call write_cache |
||
74 | mario79 | 1887 | update_disk_acces_denied: |
1 | ha | 1888 | ret |
1889 | |||
1890 | read_hd_file: |
||
1891 | ;----------------------------------------------------------------- |
||
1892 | ; |
||
1893 | ; Converting old reading function for hd-application start. |
||
1894 | ; |
||
1895 | ; IN: |
||
1896 | ; |
||
1897 | ; eax - pointer to file (0 = read only first sector of drive: eg 'label') |
||
1898 | ; ebx - file lenght |
||
1899 | ; ecx - start 512 byte block number |
||
1900 | ; edx - number of blocks to read |
||
1901 | ; esi - pointer to return/work area (atleast 20 000 bytes) |
||
1902 | ; |
||
1903 | ; For new read function |
||
1904 | ; |
||
1905 | ; EAX (PAR0) pointer to file-name |
||
1906 | ; ECX (PAR1) pointer to buffer |
||
1907 | ; EBX (PAR2) vt file blocks to read |
||
1908 | ; EDX (PAR3) pointer to path |
||
1909 | ; ESI vt first 512 block to read |
||
1910 | ; EDI if 0 - return root |
||
1911 | ;-------------------------------------------------------------------------- |
||
1912 | |||
1913 | push ecx esi edi |
||
1914 | mov esi,eax |
||
1915 | mov edi,startpath |
||
1916 | mov ecx,250 |
||
1917 | cld |
||
1918 | rep movsb |
||
1919 | pop edi esi ecx |
||
1920 | |||
1921 | mov eax,startpath |
||
1922 | mov [eax+ebx-12],byte 0 |
||
1923 | |||
1924 | push eax ebx ecx edx esi |
||
1925 | |||
1926 | pop ecx ; pointer to buffer |
||
1927 | add ecx,1024 |
||
1928 | pop ebx ; number of blocks to read |
||
1929 | pop esi ; first block to read |
||
1930 | dec esi |
||
1931 | pop eax ; file length |
||
1932 | pop edx ; pointer to path |
||
1933 | |||
1934 | mov edi,12 |
||
1935 | lea eax,[eax+edx-12+1] |
||
1936 | call file_read |
||
1937 | |||
1938 | ret |
||
1939 | |||
71 | diamond | 1940 | ; \begin{diamond} |
1941 | hd_find_lfn: |
||
1942 | ; in: esi->name |
||
1943 | ; out: CF=1 - file not found |
||
86 | diamond | 1944 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 1945 | ; destroys eax |
1946 | push esi edi |
||
1947 | push 0 |
||
1948 | push 0 |
||
1949 | push fat16_root_first |
||
1950 | push fat16_root_next |
||
1951 | mov eax, [ROOT_CLUSTER] |
||
1952 | cmp [fat_type], 32 |
||
1953 | jz .fat32 |
||
1954 | .loop: |
||
1955 | call fat_find_lfn |
||
1956 | jc .notfound |
||
1957 | cmp byte [esi], 0 |
||
1958 | jz .found |
||
1959 | test byte [edi+11], 10h |
||
1960 | jz .notfound |
||
1961 | and dword [esp+12], 0 |
||
88 | diamond | 1962 | mov eax, [edi+20-2] |
1963 | mov ax, [edi+26] ; cluster |
||
83 | diamond | 1964 | .fat32: |
1965 | mov [esp+8], eax |
||
1966 | mov dword [esp+4], fat_notroot_first |
||
1967 | mov dword [esp], fat_notroot_next |
||
1968 | jmp .loop |
||
71 | diamond | 1969 | .notfound: |
83 | diamond | 1970 | add esp, 16 |
1971 | pop edi esi |
||
1972 | stc |
||
1973 | ret |
||
71 | diamond | 1974 | .found: |
86 | diamond | 1975 | lea eax, [esp+8] |
1976 | cmp dword [eax], 0 |
||
1977 | jz .root |
||
1978 | call fat_get_sector |
||
1979 | jmp .cmn |
||
1980 | .root: |
||
1981 | mov eax, [eax+4] |
||
1982 | add eax, [ROOT_START] |
||
1983 | .cmn: |
||
83 | diamond | 1984 | add esp, 20 ; CF=0 |
1985 | pop esi |
||
1986 | ret |
||
74 | mario79 | 1987 | |
71 | diamond | 1988 | ;---------------------------------------------------------------- |
1989 | ; |
||
1990 | ; fs_HdRead - LFN variant for reading hard disk |
||
1991 | ; |
||
1992 | ; esi points to filename |
||
1993 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1994 | ; may be ebx=0 - start from first byte |
||
1995 | ; ecx number of bytes to read, 0+ |
||
1996 | ; edx mem location to return data |
||
1997 | ; |
||
77 | diamond | 1998 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 1999 | ; eax = 0 ok read or other = errormsg |
2000 | ; |
||
2001 | ;-------------------------------------------------------------- |
||
2002 | fs_HdRead: |
||
74 | mario79 | 2003 | cmp [fat_type], 0 |
2004 | jnz @f |
||
2005 | or ebx, -1 |
||
2006 | mov eax, ERROR_UNKNOWN_FS |
||
2007 | ret |
||
71 | diamond | 2008 | @@: |
74 | mario79 | 2009 | push edi |
2010 | cmp byte [esi], 0 |
||
2011 | jnz @f |
||
71 | diamond | 2012 | .noaccess: |
74 | mario79 | 2013 | pop edi |
2014 | .noaccess_2: |
||
2015 | or ebx, -1 |
||
2016 | mov eax, ERROR_ACCESS_DENIED |
||
2017 | ret |
||
2018 | |||
2019 | .noaccess_3: |
||
2020 | add esp,4 |
||
2021 | .noaccess_1: |
||
2022 | add esp,4 |
||
2023 | .noaccess_4: |
||
2024 | add esp,4*5 |
||
2025 | jmp .noaccess_2 |
||
2026 | |||
71 | diamond | 2027 | @@: |
74 | mario79 | 2028 | call hd_find_lfn |
2029 | jnc .found |
||
2030 | pop edi |
||
2031 | cmp [hd_error],0 |
||
2032 | jne .noaccess_2 |
||
2033 | or ebx, -1 |
||
2034 | mov eax, ERROR_FILE_NOT_FOUND |
||
2035 | ret |
||
2036 | |||
71 | diamond | 2037 | .found: |
74 | mario79 | 2038 | test byte [edi+11], 0x10 ; do not allow read directories |
2039 | jnz .noaccess |
||
2040 | test ebx, ebx |
||
2041 | jz .l1 |
||
2042 | cmp dword [ebx+4], 0 |
||
2043 | jz @f |
||
77 | diamond | 2044 | xor ebx, ebx |
71 | diamond | 2045 | .reteof: |
74 | mario79 | 2046 | mov eax, 6 |
2047 | pop edi |
||
2048 | ret |
||
71 | diamond | 2049 | @@: |
74 | mario79 | 2050 | mov ebx, [ebx] |
71 | diamond | 2051 | .l1: |
77 | diamond | 2052 | push ecx edx |
2053 | push 0 |
||
2054 | mov eax, [edi+28] |
||
2055 | sub eax, ebx |
||
2056 | jb .eof |
||
2057 | cmp eax, ecx |
||
2058 | jae @f |
||
2059 | mov ecx, eax |
||
2060 | mov byte [esp], 6 |
||
2061 | @@: |
||
74 | mario79 | 2062 | mov eax, [edi+20-2] |
2063 | mov ax, [edi+26] |
||
71 | diamond | 2064 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
2065 | .new_cluster: |
||
74 | mario79 | 2066 | jecxz .new_sector |
2067 | test eax, eax |
||
2068 | jz .eof |
||
2069 | cmp eax, [fatRESERVED] |
||
2070 | jae .eof |
||
2071 | mov [cluster_tmp], eax |
||
2072 | dec eax |
||
2073 | dec eax |
||
2074 | mov edi, [SECTORS_PER_CLUSTER] |
||
2075 | imul eax, edi |
||
2076 | add eax, [DATA_START] |
||
71 | diamond | 2077 | .new_sector: |
74 | mario79 | 2078 | test ecx, ecx |
2079 | jz .done |
||
2080 | sub ebx, 512 |
||
2081 | jae .skip |
||
2082 | add ebx, 512 |
||
2083 | jnz .force_buf |
||
2084 | cmp ecx, 512 |
||
2085 | jb .force_buf |
||
71 | diamond | 2086 | ; we may read directly to given buffer |
74 | mario79 | 2087 | push ebx |
2088 | mov ebx, edx |
||
2089 | call hd_read |
||
2090 | cmp [hd_error],0 |
||
2091 | jne .noaccess_1 |
||
2092 | pop ebx |
||
2093 | add edx, 512 |
||
2094 | sub ecx, 512 |
||
2095 | jmp .skip |
||
71 | diamond | 2096 | .force_buf: |
2097 | ; we must read sector to temporary buffer and then copy it to destination |
||
74 | mario79 | 2098 | push eax ebx |
2099 | mov ebx, buffer |
||
2100 | call hd_read |
||
2101 | cmp [hd_error],0 |
||
2102 | jne .noaccess_3 |
||
2103 | |||
2104 | mov eax, ebx |
||
2105 | pop ebx |
||
2106 | add eax, ebx |
||
2107 | push ecx |
||
2108 | add ecx, ebx |
||
2109 | cmp ecx, 512 |
||
2110 | jbe @f |
||
2111 | mov ecx, 512 |
||
71 | diamond | 2112 | @@: |
74 | mario79 | 2113 | sub ecx, ebx |
2114 | mov ebx, edx |
||
2115 | call memmove |
||
2116 | add edx, ecx |
||
2117 | sub [esp], ecx |
||
2118 | pop ecx |
||
2119 | pop eax |
||
2120 | xor ebx, ebx |
||
71 | diamond | 2121 | .skip: |
74 | mario79 | 2122 | inc eax |
2123 | dec edi |
||
2124 | jnz .new_sector |
||
2125 | mov eax, [cluster_tmp] |
||
2126 | call get_FAT |
||
2127 | cmp [hd_error],0 |
||
2128 | jne .noaccess_4 |
||
2129 | |||
2130 | jmp .new_cluster |
||
71 | diamond | 2131 | .done: |
77 | diamond | 2132 | mov ebx, edx |
2133 | pop eax edx ecx edi |
||
2134 | sub ebx, edx |
||
2135 | ret |
||
71 | diamond | 2136 | .eof: |
77 | diamond | 2137 | mov ebx, edx |
2138 | pop eax edx ecx |
||
2139 | sub ebx, edx |
||
2140 | jmp .reteof |
||
75 | diamond | 2141 | |
2142 | ;---------------------------------------------------------------- |
||
2143 | ; |
||
2144 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
2145 | ; |
||
2146 | ; esi points to filename |
||
78 | diamond | 2147 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
2148 | ; & flags (bitfields) |
||
2149 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 2150 | ; ecx number of blocks to read, 0+ |
2151 | ; edx mem location to return data |
||
2152 | ; |
||
77 | diamond | 2153 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 2154 | ; eax = 0 ok read or other = errormsg |
2155 | ; |
||
2156 | ;-------------------------------------------------------------- |
||
2157 | fs_HdReadFolder: |
||
2158 | mov eax, [ROOT_CLUSTER] |
||
2159 | push edi |
||
2160 | cmp byte [esi], 0 |
||
2161 | jz .doit |
||
2162 | call hd_find_lfn |
||
2163 | jnc .found |
||
2164 | pop edi |
||
2165 | or ebx, -1 |
||
2166 | mov eax, ERROR_FILE_NOT_FOUND |
||
2167 | ret |
||
2168 | .found: |
||
2169 | test byte [edi+11], 0x10 ; do not allow read files |
||
2170 | jnz .found_dir |
||
2171 | pop edi |
||
2172 | or ebx, -1 |
||
2173 | mov eax, ERROR_ACCESS_DENIED |
||
2174 | ret |
||
2175 | .found_dir: |
||
2176 | mov eax, [edi+20-2] |
||
2177 | mov ax, [edi+26] ; eax=cluster |
||
2178 | .doit: |
||
2179 | push esi ecx |
||
2180 | push ebp |
||
2181 | sub esp, 262*2 ; reserve space for LFN |
||
2182 | mov ebp, esp |
||
78 | diamond | 2183 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
2184 | mov ebx, [ebx] |
||
75 | diamond | 2185 | ; init header |
2186 | push eax ecx |
||
2187 | mov edi, edx |
||
2188 | mov ecx, 32/4 |
||
2189 | xor eax, eax |
||
2190 | rep stosd |
||
2191 | pop ecx eax |
||
2192 | mov byte [edx], 1 ; version |
||
2193 | mov esi, edi ; esi points to BDFE |
||
2194 | .new_cluster: |
||
2195 | mov [cluster_tmp], eax |
||
2196 | test eax, eax |
||
2197 | jnz @f |
||
2198 | cmp [fat_type], 32 |
||
2199 | jz .notfound |
||
2200 | mov eax, [ROOT_START] |
||
2201 | push [ROOT_SECTORS] |
||
2202 | push ebx |
||
2203 | jmp .new_sector |
||
2204 | @@: |
||
2205 | dec eax |
||
2206 | dec eax |
||
2207 | imul eax, [SECTORS_PER_CLUSTER] |
||
2208 | push [SECTORS_PER_CLUSTER] |
||
2209 | add eax, [DATA_START] |
||
2210 | push ebx |
||
2211 | .new_sector: |
||
2212 | mov ebx, buffer |
||
2213 | mov edi, ebx |
||
2214 | call hd_read |
||
2215 | cmp [hd_error], 0 |
||
2216 | jnz .notfound2 |
||
2217 | add ebx, 512 |
||
2218 | push eax |
||
2219 | .l1: |
||
2220 | call fat_get_name |
||
2221 | jc .l2 |
||
2222 | cmp byte [edi+11], 0xF |
||
2223 | jnz .do_bdfe |
||
2224 | add edi, 0x20 |
||
2225 | cmp edi, ebx |
||
2226 | jb .do_bdfe |
||
2227 | pop eax |
||
2228 | inc eax |
||
2229 | dec dword [esp+4] |
||
2230 | jnz @f |
||
2231 | mov eax, [cluster_tmp] |
||
2232 | test eax, eax |
||
2233 | jz .done |
||
2234 | call get_FAT |
||
2235 | cmp [hd_error], 0 |
||
2236 | jnz .notfound2 |
||
2237 | cmp eax, 2 |
||
2238 | jb .done |
||
2239 | cmp eax, [fatRESERVED] |
||
2240 | jae .done |
||
2241 | push eax |
||
2242 | mov eax, [SECTORS_PER_CLUSTER] |
||
2243 | mov [esp+8], eax |
||
2244 | pop eax |
||
2245 | mov [cluster_tmp], eax |
||
2246 | dec eax |
||
2247 | dec eax |
||
2248 | imul eax, [SECTORS_PER_CLUSTER] |
||
2249 | add eax, [DATA_START] |
||
2250 | @@: |
||
2251 | mov ebx, buffer |
||
2252 | mov edi, ebx |
||
2253 | call hd_read |
||
2254 | cmp [hd_error], 0 |
||
2255 | jnz .notfound2 |
||
2256 | add ebx, 512 |
||
2257 | push eax |
||
2258 | .do_bdfe: |
||
2259 | inc dword [edx+8] ; new file found |
||
2260 | dec dword [esp+4] |
||
2261 | jns .l2 |
||
2262 | dec ecx |
||
2263 | js .l2 |
||
2264 | inc dword [edx+4] ; new file block copied |
||
2265 | call fat_entry_to_bdfe |
||
2266 | .l2: |
||
2267 | add edi, 0x20 |
||
2268 | cmp edi, ebx |
||
2269 | jb .l1 |
||
2270 | pop eax |
||
2271 | inc eax |
||
2272 | dec dword [esp+4] |
||
2273 | jnz .new_sector |
||
2274 | mov eax, [cluster_tmp] |
||
2275 | test eax, eax |
||
2276 | jz .done |
||
2277 | call get_FAT |
||
2278 | cmp [hd_error], 0 |
||
2279 | jnz .notfound2 |
||
2280 | cmp eax, 2 |
||
2281 | jb .done |
||
2282 | cmp eax, [fatRESERVED] |
||
2283 | jae .done |
||
2284 | push eax |
||
2285 | mov eax, [SECTORS_PER_CLUSTER] |
||
2286 | mov [esp+8], eax |
||
2287 | pop eax |
||
2288 | pop ebx |
||
2289 | add esp, 4 |
||
2290 | jmp .new_cluster |
||
2291 | .notfound2: |
||
2292 | add esp, 8 |
||
2293 | .notfound: |
||
2294 | add esp, 262*2+4 |
||
2295 | pop ebp ecx esi edi |
||
2296 | mov eax, ERROR_FILE_NOT_FOUND |
||
2297 | or ebx, -1 |
||
2298 | ret |
||
2299 | .done: |
||
2300 | add esp, 262*2+4+8 |
||
2301 | pop ebp |
||
77 | diamond | 2302 | mov ebx, [edx+4] |
75 | diamond | 2303 | xor eax, eax |
2304 | dec ecx |
||
2305 | js @f |
||
2306 | mov al, ERROR_END_OF_FILE |
||
2307 | @@: |
||
2308 | pop ecx esi edi |
||
2309 | ret |
||
2310 | |||
83 | diamond | 2311 | fat16_root_next: |
2312 | cmp edi, buffer+0x200-0x20 |
||
2313 | jae fat16_root_next_sector |
||
2314 | add edi, 0x20 |
||
2315 | ret ; CF=0 |
||
2316 | fat16_root_next_sector: |
||
2317 | ; read next sector |
||
171 | diamond | 2318 | push [longname_sec2] |
2319 | pop [longname_sec1] |
||
83 | diamond | 2320 | push ecx |
2321 | mov ecx, [eax+4] |
||
171 | diamond | 2322 | push ecx |
2323 | add ecx, [ROOT_START] |
||
2324 | mov [longname_sec2], ecx |
||
2325 | pop ecx |
||
83 | diamond | 2326 | inc ecx |
2327 | mov [eax+4], ecx |
||
2328 | cmp ecx, [ROOT_SECTORS] |
||
2329 | pop ecx |
||
2330 | jae fat16_root_first.readerr |
||
2331 | fat16_root_first: |
||
2332 | mov eax, [eax+4] |
||
2333 | add eax, [ROOT_START] |
||
2334 | push ebx |
||
2335 | mov edi, buffer |
||
2336 | mov ebx, edi |
||
2337 | call hd_read |
||
2338 | pop ebx |
||
2339 | cmp [hd_error], 0 |
||
2340 | jnz .readerr |
||
2341 | ret ; CF=0 |
||
2342 | .readerr: |
||
2343 | stc |
||
2344 | ret |
||
2345 | fat16_root_begin_write: |
||
2346 | push edi eax |
||
2347 | call fat16_root_first |
||
2348 | pop eax edi |
||
2349 | ret |
||
2350 | fat16_root_end_write: |
||
2351 | pusha |
||
2352 | mov eax, [eax+4] |
||
2353 | add eax, [ROOT_START] |
||
2354 | mov ebx, buffer |
||
2355 | call hd_write |
||
2356 | popa |
||
2357 | ret |
||
2358 | fat16_root_next_write: |
||
2359 | cmp edi, buffer+0x200 |
||
2360 | jae @f |
||
2361 | ret |
||
2362 | @@: |
||
2363 | call fat16_root_end_write |
||
2364 | jmp fat16_root_next_sector |
||
2365 | fat16_root_extend_dir: |
||
2366 | stc |
||
2367 | ret |
||
2368 | |||
2369 | fat_notroot_next: |
||
2370 | cmp edi, buffer+0x200-0x20 |
||
2371 | jae fat_notroot_next_sector |
||
2372 | add edi, 0x20 |
||
2373 | ret ; CF=0 |
||
2374 | fat_notroot_next_sector: |
||
171 | diamond | 2375 | push [longname_sec2] |
2376 | pop [longname_sec1] |
||
2377 | push eax |
||
2378 | call fat_get_sector |
||
2379 | mov [longname_sec2], eax |
||
2380 | pop eax |
||
83 | diamond | 2381 | push ecx |
2382 | mov ecx, [eax+4] |
||
2383 | inc ecx |
||
2384 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
2385 | jae fat_notroot_next_cluster |
||
2386 | mov [eax+4], ecx |
||
2387 | jmp @f |
||
2388 | fat_notroot_next_cluster: |
||
2389 | push eax |
||
2390 | mov eax, [eax] |
||
2391 | call get_FAT |
||
2392 | mov ecx, eax |
||
2393 | pop eax |
||
2394 | cmp [hd_error], 0 |
||
2395 | jnz fat_notroot_next_err |
||
2396 | cmp ecx, [fatRESERVED] |
||
2397 | jae fat_notroot_next_err |
||
2398 | mov [eax], ecx |
||
2399 | and dword [eax+4], 0 |
||
2400 | @@: |
||
2401 | pop ecx |
||
2402 | fat_notroot_first: |
||
2403 | call fat_get_sector |
||
2404 | push ebx |
||
2405 | mov edi, buffer |
||
2406 | mov ebx, edi |
||
2407 | call hd_read |
||
2408 | pop ebx |
||
2409 | cmp [hd_error], 0 |
||
2410 | jnz @f |
||
2411 | ret ; CF=0 |
||
2412 | fat_notroot_next_err: |
||
2413 | pop ecx |
||
2414 | @@: |
||
2415 | stc |
||
2416 | ret |
||
2417 | fat_notroot_begin_write: |
||
2418 | push eax edi |
||
2419 | call fat_notroot_first |
||
2420 | pop edi eax |
||
2421 | ret |
||
2422 | fat_notroot_end_write: |
||
2423 | call fat_get_sector |
||
2424 | push ebx |
||
2425 | mov ebx, buffer |
||
2426 | call hd_write |
||
2427 | pop ebx |
||
2428 | ret |
||
2429 | fat_notroot_next_write: |
||
2430 | cmp edi, buffer+0x200 |
||
2431 | jae @f |
||
2432 | ret |
||
2433 | @@: |
||
2434 | push eax |
||
2435 | call fat_notroot_end_write |
||
2436 | pop eax |
||
2437 | jmp fat_notroot_next_sector |
||
2438 | fat_notroot_extend_dir: |
||
2439 | push eax |
||
2440 | mov eax, [eax] |
||
2441 | call get_free_FAT |
||
2442 | jnc .found |
||
2443 | pop eax |
||
2444 | ret ; CF=1 |
||
2445 | .found: |
||
2446 | push edx |
||
2447 | mov edx, [fatEND] |
||
2448 | call set_FAT |
||
2449 | mov edx, eax |
||
2450 | mov eax, [esp+4] |
||
2451 | mov eax, [eax] |
||
2452 | push edx |
||
2453 | call set_FAT |
||
2454 | pop edx |
||
2455 | cmp [hd_error], 0 |
||
2456 | jz @f |
||
2457 | pop edx |
||
2458 | pop eax |
||
2459 | stc |
||
2460 | ret |
||
2461 | @@: |
||
2462 | push ecx |
||
2463 | or ecx, -1 |
||
2464 | call add_disk_free_space |
||
2465 | ; zero new cluster |
||
2466 | mov ecx, 512/4 |
||
2467 | mov edi, buffer |
||
2468 | push edi |
||
2469 | xor eax, eax |
||
2470 | rep stosd |
||
2471 | pop edi |
||
2472 | pop ecx |
||
2473 | mov eax, [esp+4] |
||
2474 | mov [eax], edx |
||
2475 | and dword [eax+4], 0 |
||
2476 | pop edx |
||
2477 | mov eax, [eax] |
||
2478 | dec eax |
||
2479 | dec eax |
||
2480 | push ebx ecx |
||
2481 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2482 | imul eax, ecx |
||
2483 | add eax, [DATA_START] |
||
2484 | mov ebx, edi |
||
2485 | @@: |
||
2486 | call hd_write |
||
2487 | inc eax |
||
2488 | loop @b |
||
2489 | pop ecx ebx eax |
||
2490 | clc |
||
2491 | ret |
||
2492 | |||
2493 | fat_get_sector: |
||
2494 | push ecx |
||
2495 | mov ecx, [eax] |
||
2496 | dec ecx |
||
2497 | dec ecx |
||
2498 | imul ecx, [SECTORS_PER_CLUSTER] |
||
2499 | add ecx, [DATA_START] |
||
2500 | add ecx, [eax+4] |
||
2501 | mov eax, ecx |
||
2502 | pop ecx |
||
2503 | ret |
||
2504 | |||
2505 | ;---------------------------------------------------------------- |
||
2506 | ; |
||
2507 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
2508 | ; |
||
2509 | ; esi points to filename |
||
2510 | ; ebx ignored (reserved) |
||
2511 | ; ecx number of bytes to write, 0+ |
||
2512 | ; edx mem location to data |
||
2513 | ; |
||
2514 | ; ret ebx = number of written bytes |
||
2515 | ; eax = 0 ok read or other = errormsg |
||
2516 | ; |
||
2517 | ;-------------------------------------------------------------- |
||
2518 | fshrad: |
||
2519 | mov eax, ERROR_ACCESS_DENIED |
||
2520 | xor ebx, ebx |
||
2521 | ret |
||
2522 | fshrfs: |
||
2523 | mov eax, ERROR_UNKNOWN_FS |
||
2524 | xor ebx, ebx |
||
2525 | ret |
||
2526 | |||
2527 | fs_HdRewrite: |
||
2528 | cmp [fat_type], 0 |
||
2529 | jz fshrfs |
||
2530 | cmp byte [esi], 0 |
||
2531 | jz fshrad |
||
2532 | pushad |
||
2533 | xor ebp, ebp |
||
2534 | push esi |
||
2535 | @@: |
||
2536 | lodsb |
||
2537 | test al, al |
||
2538 | jz @f |
||
2539 | cmp al, '/' |
||
2540 | jnz @b |
||
2541 | lea ebp, [esi-1] |
||
2542 | jmp @b |
||
2543 | @@: |
||
2544 | pop esi |
||
2545 | test ebp, ebp |
||
2546 | jnz .noroot |
||
2547 | mov ebp, [ROOT_CLUSTER] |
||
2548 | cmp [fat_type], 32 |
||
2549 | jz .pushnotroot |
||
2550 | push fat16_root_extend_dir |
||
2551 | push fat16_root_end_write |
||
2552 | push fat16_root_next_write |
||
2553 | push fat16_root_begin_write |
||
2554 | xor ebp, ebp |
||
2555 | push ebp |
||
2556 | push ebp |
||
2557 | push fat16_root_first |
||
2558 | push fat16_root_next |
||
2559 | jmp .common1 |
||
2560 | .noroot: |
||
2561 | ; check existence |
||
2562 | mov byte [ebp], 0 |
||
2563 | call hd_find_lfn |
||
2564 | mov byte [ebp], '/' |
||
2565 | lea esi, [ebp+1] |
||
2566 | jnc @f |
||
2567 | mov eax, ERROR_FILE_NOT_FOUND |
||
2568 | .ret1: |
||
2569 | mov [esp+28], eax |
||
2570 | popad |
||
2571 | xor ebx, ebx |
||
2572 | ret |
||
2573 | @@: |
||
2574 | test byte [edi+11], 0x10 ; must be directory |
||
2575 | mov eax, ERROR_ACCESS_DENIED |
||
2576 | jz .ret1 |
||
2577 | mov ebp, [edi+20-2] |
||
2578 | mov bp, [edi+26] ; ebp=cluster |
||
2579 | mov eax, ERROR_FAT_TABLE |
||
2580 | cmp ebp, 2 |
||
2581 | jb .ret1 |
||
2582 | .pushnotroot: |
||
2583 | push fat_notroot_extend_dir |
||
2584 | push fat_notroot_end_write |
||
2585 | push fat_notroot_next_write |
||
2586 | push fat_notroot_begin_write |
||
2587 | push 0 |
||
2588 | push ebp |
||
2589 | push fat_notroot_first |
||
2590 | push fat_notroot_next |
||
2591 | .common1: |
||
2592 | call fat_find_lfn |
||
2593 | jc .notfound |
||
91 | diamond | 2594 | ; found; must not be directory |
2595 | test byte [edi+11], 10h |
||
2596 | jz @f |
||
2597 | add esp, 32 |
||
2598 | popad |
||
2599 | mov eax, ERROR_ACCESS_DENIED |
||
2600 | xor ebx, ebx |
||
2601 | ret |
||
2602 | @@: |
||
2603 | ; delete FAT chain |
||
83 | diamond | 2604 | push edi |
2605 | xor eax, eax |
||
2606 | mov dword [edi+28], eax ; zero size |
||
2607 | xor ecx, ecx |
||
2608 | mov eax, [edi+20-2] |
||
2609 | mov ax, [edi+26] |
||
2610 | mov word [edi+20], cx |
||
2611 | mov word [edi+26], cx |
||
2612 | test eax, eax |
||
2613 | jz .done1 |
||
2614 | @@: |
||
2615 | cmp eax, [fatRESERVED] |
||
2616 | jae .done1 |
||
2617 | push edx |
||
2618 | xor edx, edx |
||
2619 | call set_FAT |
||
2620 | mov eax, edx |
||
2621 | pop edx |
||
2622 | inc ecx |
||
2623 | jmp @b |
||
2624 | .done1: |
||
2625 | pop edi |
||
2626 | call get_time_for_file |
||
2627 | mov [edi+22], ax |
||
2628 | call get_date_for_file |
||
2629 | mov [edi+24], ax |
||
2630 | mov [edi+18], ax |
||
2631 | or byte [edi+11], 20h ; set 'archive' attribute |
||
2632 | jmp .doit |
||
2633 | .notfound: |
||
2634 | ; file is not found; generate short name |
||
2635 | call fat_name_is_legal |
||
2636 | jc @f |
||
2637 | add esp, 32 |
||
2638 | popad |
||
2639 | mov eax, ERROR_FILE_NOT_FOUND |
||
2640 | xor ebx, ebx |
||
2641 | ret |
||
2642 | @@: |
||
2643 | sub esp, 12 |
||
2644 | mov edi, esp |
||
2645 | call fat_gen_short_name |
||
2646 | .test_short_name_loop: |
||
2647 | push esi edi ecx |
||
2648 | mov esi, edi |
||
2649 | lea eax, [esp+12+12+8] |
||
2650 | mov [eax], ebp |
||
2651 | and dword [eax+4], 0 |
||
2652 | call dword [eax-4] |
||
2653 | jc .found |
||
2654 | .test_short_name_entry: |
||
2655 | cmp byte [edi+11], 0xF |
||
2656 | jz .test_short_name_cont |
||
2657 | mov ecx, 11 |
||
2658 | push esi edi |
||
2659 | repz cmpsb |
||
2660 | pop edi esi |
||
2661 | jz .short_name_found |
||
2662 | .test_short_name_cont: |
||
2663 | lea eax, [esp+12+12+8] |
||
2664 | call dword [eax-8] |
||
2665 | jnc .test_short_name_entry |
||
2666 | jmp .found |
||
2667 | .short_name_found: |
||
2668 | pop ecx edi esi |
||
2669 | call fat_next_short_name |
||
2670 | jnc .test_short_name_loop |
||
2671 | .disk_full: |
||
2672 | add esp, 12+32 |
||
2673 | popa |
||
2674 | mov eax, ERROR_DISK_FULL |
||
2675 | xor ebx, ebx |
||
2676 | ret |
||
2677 | .found: |
||
2678 | pop ecx edi esi |
||
2679 | ; now find space in directory |
||
2680 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
2681 | mov al, '~' |
||
2682 | push ecx edi |
||
2683 | mov ecx, 8 |
||
2684 | repnz scasb |
||
2685 | push 1 |
||
2686 | pop eax ; 1 entry |
||
2687 | jnz .notilde |
||
2688 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
2689 | xor eax, eax |
||
2690 | @@: |
||
2691 | cmp byte [esi], 0 |
||
2692 | jz @f |
||
2693 | inc esi |
||
2694 | inc eax |
||
2695 | jmp @b |
||
2696 | @@: |
||
2697 | sub esi, eax |
||
2698 | add eax, 12+13 |
||
2699 | mov ecx, 13 |
||
2700 | push edx |
||
2701 | cdq |
||
2702 | div ecx |
||
2703 | pop edx |
||
2704 | .notilde: |
||
2705 | push -1 |
||
2706 | push -1 |
||
2707 | push -1 |
||
2708 | ; find |
||
2709 | xor ecx, ecx |
||
2710 | push eax |
||
2711 | lea eax, [esp+16+8+12+8] |
||
2712 | mov [eax], ebp |
||
2713 | and dword [eax+4], 0 |
||
2714 | call dword [eax-4] |
||
2715 | pop eax |
||
2716 | jnc .scan_dir |
||
2717 | .fsfrfe3: |
||
2718 | add esp, 12+8+12+32 |
||
2719 | popad |
||
2720 | mov eax, 11 |
||
2721 | xor ebx, ebx |
||
2722 | ret |
||
2723 | .scan_dir: |
||
2724 | cmp byte [edi], 0 |
||
2725 | jz .free |
||
2726 | cmp byte [edi], 0xE5 |
||
2727 | jz .free |
||
2728 | xor ecx, ecx |
||
2729 | .scan_cont: |
||
2730 | push eax |
||
2731 | lea eax, [esp+16+8+12+8] |
||
2732 | call dword [eax-8] |
||
2733 | pop eax |
||
2734 | jnc .scan_dir |
||
2735 | cmp [hd_error], 0 |
||
2736 | jnz .fsfrfe3 |
||
2737 | push eax |
||
2738 | lea eax, [esp+16+8+12+8] |
||
2739 | call dword [eax+20] ; extend directory |
||
2740 | pop eax |
||
2741 | jnc .scan_dir |
||
2742 | add esp, 12+8+12+32 |
||
2743 | popad |
||
2744 | mov eax, ERROR_DISK_FULL |
||
2745 | xor ebx, ebx |
||
2746 | ret |
||
2747 | .free: |
||
2748 | test ecx, ecx |
||
2749 | jnz @f |
||
2750 | mov [esp], edi |
||
2751 | mov ecx, [esp+12+8+12+8] |
||
2752 | mov [esp+4], ecx |
||
2753 | mov ecx, [esp+12+8+12+12] |
||
2754 | mov [esp+8], ecx |
||
2755 | xor ecx, ecx |
||
2756 | @@: |
||
2757 | inc ecx |
||
2758 | cmp ecx, eax |
||
2759 | jb .scan_cont |
||
2760 | ; found! |
||
2761 | ; calculate name checksum |
||
2762 | push esi ecx |
||
2763 | mov esi, [esp+8+12] |
||
2764 | mov ecx, 11 |
||
2765 | xor eax, eax |
||
2766 | @@: |
||
2767 | ror al, 1 |
||
2768 | add al, [esi] |
||
2769 | inc esi |
||
2770 | loop @b |
||
2771 | pop ecx esi |
||
2772 | pop edi |
||
2773 | pop dword [esp+8+12+12] |
||
2774 | pop dword [esp+8+12+12] |
||
2775 | ; edi points to first entry in free chunk |
||
2776 | dec ecx |
||
2777 | jz .nolfn |
||
2778 | push esi |
||
2779 | push eax |
||
2780 | lea eax, [esp+8+8+12+8] |
||
2781 | call dword [eax+8] ; begin write |
||
2782 | mov al, 40h |
||
2783 | .writelfn: |
||
2784 | or al, cl |
||
2785 | mov esi, [esp+4] |
||
2786 | push ecx |
||
2787 | dec ecx |
||
2788 | imul ecx, 13 |
||
2789 | add esi, ecx |
||
2790 | stosb |
||
2791 | mov cl, 5 |
||
2792 | call fs_RamdiskRewrite.read_symbols |
||
2793 | mov ax, 0xF |
||
2794 | stosw |
||
2795 | mov al, [esp+4] |
||
2796 | stosb |
||
2797 | mov cl, 6 |
||
2798 | call fs_RamdiskRewrite.read_symbols |
||
2799 | xor eax, eax |
||
2800 | stosw |
||
2801 | mov cl, 2 |
||
2802 | call fs_RamdiskRewrite.read_symbols |
||
2803 | pop ecx |
||
2804 | lea eax, [esp+8+8+12+8] |
||
2805 | call dword [eax+12] ; next write |
||
2806 | xor eax, eax |
||
2807 | loop .writelfn |
||
2808 | pop eax |
||
2809 | pop esi |
||
2810 | ; lea eax, [esp+8+12+8] |
||
2811 | ; call dword [eax+16] ; end write |
||
2812 | .nolfn: |
||
2813 | xchg esi, [esp] |
||
2814 | mov ecx, 11 |
||
2815 | rep movsb |
||
2816 | mov word [edi], 20h ; attributes |
||
2817 | sub edi, 11 |
||
2818 | pop esi ecx |
||
2819 | add esp, 12 |
||
2820 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
2821 | call get_time_for_file |
||
2822 | mov [edi+14], ax ; creation time |
||
2823 | mov [edi+22], ax ; last write time |
||
2824 | call get_date_for_file |
||
2825 | mov [edi+16], ax ; creation date |
||
2826 | mov [edi+24], ax ; last write date |
||
2827 | mov [edi+18], ax ; last access date |
||
2828 | xor ecx, ecx |
||
2829 | mov word [edi+20], cx ; high word of cluster |
||
2830 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
2831 | mov dword [edi+28], ecx ; file size - to be filled |
||
2832 | .doit: |
||
2833 | lea eax, [esp+8] |
||
2834 | call dword [eax+16] ; flush directory |
||
2835 | push ecx |
||
2836 | mov ecx, [esp+4+32+24] |
||
2837 | push ecx |
||
2838 | push edi |
||
2839 | mov esi, edx |
||
2840 | test ecx, ecx |
||
2841 | jz .done |
||
2842 | mov eax, 2 |
||
2843 | call get_free_FAT |
||
2844 | jc .diskfull |
||
2845 | push eax |
||
2846 | mov [edi+26], ax |
||
2847 | shr eax, 16 |
||
2848 | mov [edi+20], ax |
||
2849 | lea eax, [esp+16+8] |
||
2850 | call dword [eax+16] ; flush directory |
||
2851 | pop eax |
||
2852 | push edx |
||
2853 | mov edx, [fatEND] |
||
2854 | call set_FAT |
||
2855 | pop edx |
||
2856 | .write_cluster: |
||
2857 | push eax |
||
2858 | dec eax |
||
2859 | dec eax |
||
2860 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2861 | imul eax, ebp |
||
2862 | add eax, [DATA_START] |
||
2863 | ; write data |
||
2864 | .write_sector: |
||
2865 | mov ecx, 512 |
||
2866 | cmp dword [esp+8], ecx |
||
2867 | jb .writeshort |
||
2868 | ; we can write directly from given buffer |
||
2869 | mov ebx, esi |
||
2870 | add esi, ecx |
||
2871 | jmp .writecommon |
||
2872 | .writeshort: |
||
2873 | mov ecx, [esp+8] |
||
2874 | push ecx |
||
2875 | mov edi, buffer |
||
2876 | mov ebx, edi |
||
2877 | rep movsb |
||
2878 | mov ecx, buffer+0x200 |
||
2879 | sub ecx, edi |
||
2880 | push eax |
||
2881 | xor eax, eax |
||
2882 | rep stosb |
||
2883 | pop eax |
||
2884 | pop ecx |
||
2885 | .writecommon: |
||
2886 | call hd_write |
||
2887 | cmp [hd_error], 0 |
||
2888 | jnz .writeerr |
||
2889 | inc eax |
||
2890 | sub dword [esp+8], ecx |
||
2891 | jz .writedone |
||
2892 | dec ebp |
||
2893 | jnz .write_sector |
||
2894 | ; allocate new cluster |
||
2895 | pop eax |
||
2896 | mov ecx, eax |
||
2897 | call get_free_FAT |
||
2898 | jc .diskfull |
||
2899 | push edx |
||
2900 | mov edx, [fatEND] |
||
2901 | call set_FAT |
||
2902 | xchg eax, ecx |
||
2903 | mov edx, ecx |
||
2904 | call set_FAT |
||
2905 | pop edx |
||
2906 | xchg eax, ecx |
||
2907 | jmp .write_cluster |
||
2908 | .diskfull: |
||
2909 | mov eax, ERROR_DISK_FULL |
||
2910 | jmp .ret |
||
2911 | .writeerr: |
||
2912 | pop eax |
||
2913 | sub esi, ecx |
||
2914 | mov eax, 11 |
||
2915 | jmp .ret |
||
2916 | .writedone: |
||
2917 | pop eax |
||
2918 | .done: |
||
2919 | xor eax, eax |
||
2920 | .ret: |
||
2921 | pop edi ecx |
||
2922 | mov ebx, esi |
||
2923 | sub ebx, edx |
||
2924 | pop ebp |
||
2925 | mov [esp+32+28], eax |
||
2926 | lea eax, [esp+8] |
||
2927 | call dword [eax+8] |
||
2928 | mov [edi+28], ebx |
||
2929 | call dword [eax+16] |
||
2930 | mov [esp+32+16], ebx |
||
2931 | lea eax, [ebx+511] |
||
2932 | shr eax, 9 |
||
2933 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2934 | lea eax, [eax+ecx-1] |
||
2935 | xor edx, edx |
||
2936 | div ecx |
||
2937 | mov ecx, ebp |
||
2938 | sub ecx, eax |
||
2939 | call add_disk_free_space |
||
2940 | add esp, 32 |
||
2941 | call update_disk |
||
2942 | popad |
||
2943 | ret |
||
2944 | |||
131 | diamond | 2945 | ;---------------------------------------------------------------- |
2946 | ; |
||
2947 | ; fs_HdWrite - LFN variant for writing to floppy |
||
2948 | ; |
||
2949 | ; esi points to filename |
||
2950 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2951 | ; may be ebx=0 - start from first byte |
||
2952 | ; ecx number of bytes to write, 0+ |
||
2953 | ; edx mem location to data |
||
2954 | ; |
||
2955 | ; ret ebx = bytes written (maybe 0) |
||
2956 | ; eax = 0 ok write or other = errormsg |
||
2957 | ; |
||
2958 | ;-------------------------------------------------------------- |
||
2959 | fs_HdWrite.access_denied: |
||
2960 | push ERROR_ACCESS_DENIED |
||
2961 | fs_HdWrite.ret0: |
||
2962 | pop eax |
||
2963 | xor ebx, ebx |
||
2964 | ret |
||
2965 | |||
2966 | fs_HdWrite.ret11: |
||
2967 | push 11 |
||
2968 | jmp fs_HdWrite.ret0 |
||
2969 | |||
2970 | fs_HdWrite: |
||
2971 | cmp [fat_type], 0 |
||
2972 | jnz @f |
||
2973 | push ERROR_UNKNOWN_FS |
||
2974 | jmp .ret0 |
||
2975 | @@: |
||
2976 | cmp byte [esi], 0 |
||
2977 | jz .access_denied |
||
2978 | pushad |
||
2979 | call hd_find_lfn |
||
2980 | pushfd |
||
2981 | cmp [hd_error], 0 |
||
2982 | jz @f |
||
2983 | popfd |
||
2984 | popad |
||
2985 | push 11 |
||
2986 | jmp .ret0 |
||
2987 | @@: |
||
2988 | popfd |
||
2989 | jnc .found |
||
2990 | popad |
||
2991 | push ERROR_FILE_NOT_FOUND |
||
2992 | jmp .ret0 |
||
2993 | .found: |
||
2994 | ; FAT does not support files larger than 4GB |
||
2995 | test ebx, ebx |
||
2996 | jz .l1 |
||
2997 | cmp dword [ebx+4], 0 |
||
2998 | jz @f |
||
2999 | .eof: |
||
3000 | popad |
||
3001 | push ERROR_END_OF_FILE |
||
3002 | jmp .ret0 |
||
3003 | @@: |
||
3004 | mov ebx, [ebx] |
||
3005 | .l1: |
||
3006 | ; now edi points to direntry, ebx=start byte to write, |
||
3007 | ; ecx=number of bytes to write, edx=data pointer |
||
3008 | |||
3009 | ; extend file if needed |
||
3010 | add ecx, ebx |
||
3011 | jc .eof ; FAT does not support files larger than 4GB |
||
3012 | push eax ; save directory sector |
||
3013 | push 0 ; return value=0 |
||
3014 | |||
3015 | call get_time_for_file |
||
3016 | mov [edi+22], ax ; last write time |
||
3017 | call get_date_for_file |
||
3018 | mov [edi+24], ax ; last write date |
||
3019 | mov [edi+18], ax ; last access date |
||
3020 | |||
3021 | push dword [edi+28] ; save current file size |
||
3022 | cmp ecx, [edi+28] |
||
3023 | jbe .length_ok |
||
3024 | cmp ecx, ebx |
||
3025 | jz .length_ok |
||
3026 | call hd_extend_file |
||
3027 | jnc .length_ok |
||
3028 | mov [esp+4], eax |
||
3029 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
3030 | ; First two cases are fatal errors, in third case we may write some data |
||
3031 | cmp al, ERROR_DISK_FULL |
||
3032 | jz .disk_full |
||
3033 | pop eax |
||
3034 | pop eax |
||
3035 | mov [esp+4+28], eax |
||
3036 | pop eax |
||
3037 | popad |
||
3038 | xor ebx, ebx |
||
3039 | ret |
||
3040 | .disk_full: |
||
3041 | ; correct number of bytes to write |
||
3042 | mov ecx, [edi+28] |
||
3043 | cmp ecx, ebx |
||
3044 | ja .length_ok |
||
3045 | .ret: |
||
3046 | call update_disk |
||
3047 | cmp [hd_error], 0 |
||
3048 | jz @f |
||
3049 | mov byte [esp+4], 11 |
||
3050 | @@: |
||
3051 | pop eax |
||
3052 | pop eax |
||
3053 | mov [esp+4+28], eax ; eax=return value |
||
3054 | pop eax |
||
3055 | sub edx, [esp+20] |
||
3056 | mov [esp+16], edx ; ebx=number of written bytes |
||
3057 | popad |
||
3058 | ret |
||
3059 | .length_ok: |
||
3060 | mov esi, [edi+28] |
||
3061 | mov eax, [edi+20-2] |
||
3062 | mov ax, [edi+26] |
||
3063 | mov edi, eax ; edi=current cluster |
||
3064 | xor ebp, ebp ; ebp=current sector in cluster |
||
3065 | ; save directory |
||
3066 | mov eax, [esp+8] |
||
3067 | push ebx |
||
3068 | mov ebx, buffer |
||
3069 | call hd_write |
||
3070 | pop ebx |
||
3071 | cmp [hd_error], 0 |
||
3072 | jz @f |
||
3073 | .device_err: |
||
3074 | mov byte [esp+4], 11 |
||
3075 | jmp .ret |
||
3076 | @@: |
||
3077 | |||
3078 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
3079 | sub ecx, ebx |
||
3080 | jz .ret |
||
3081 | .write_loop: |
||
3082 | ; get length of data in current sector |
||
3083 | push ecx |
||
3084 | sub ebx, 0x200 |
||
3085 | jb .hasdata |
||
3086 | neg ebx |
||
3087 | xor ecx, ecx |
||
3088 | jmp @f |
||
3089 | .hasdata: |
||
3090 | neg ebx |
||
3091 | cmp ecx, ebx |
||
3092 | jbe @f |
||
3093 | mov ecx, ebx |
||
3094 | @@: |
||
3095 | ; get current sector number |
||
3096 | mov eax, edi |
||
3097 | dec eax |
||
3098 | dec eax |
||
3099 | imul eax, [SECTORS_PER_CLUSTER] |
||
3100 | add eax, [DATA_START] |
||
3101 | add eax, ebp |
||
3102 | ; load sector if needed |
||
3103 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
3104 | jz .noread |
||
3105 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
3106 | jz .noread |
||
3107 | cmp ecx, esi ; (same for the last sector) |
||
3108 | jz .noread |
||
3109 | push ebx |
||
3110 | mov ebx, buffer |
||
3111 | call hd_read |
||
3112 | pop ebx |
||
3113 | cmp [hd_error], 0 |
||
3114 | jz @f |
||
3115 | .device_err2: |
||
3116 | pop ecx |
||
3117 | jmp .device_err |
||
3118 | @@: |
||
3119 | .noread: |
||
3120 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
3121 | push eax ecx edi |
||
3122 | xor eax, eax |
||
3123 | mov ecx, 0x200 |
||
3124 | sub ecx, [esp+4+12] |
||
3125 | jbe @f |
||
3126 | mov edi, buffer |
||
3127 | add edi, [esp+4+12] |
||
3128 | rep stosb |
||
3129 | @@: |
||
3130 | ; zero uninitialized data in the last sector |
||
3131 | mov ecx, 0x200 |
||
3132 | sub ecx, esi |
||
3133 | jbe @f |
||
3134 | mov edi, buffer |
||
3135 | add edi, esi |
||
3136 | rep stosb |
||
3137 | @@: |
||
3138 | pop edi ecx eax |
||
3139 | ; copy new data |
||
3140 | push eax |
||
3141 | mov eax, edx |
||
3142 | neg ebx |
||
3143 | jecxz @f |
||
3144 | add ebx, buffer+0x200 |
||
3145 | call memmove |
||
3146 | xor ebx, ebx |
||
3147 | @@: |
||
3148 | pop eax |
||
3149 | ; save sector |
||
3150 | push ebx |
||
3151 | mov ebx, buffer |
||
3152 | call hd_write |
||
3153 | pop ebx |
||
3154 | cmp [hd_error], 0 |
||
3155 | jnz .device_err2 |
||
3156 | add edx, ecx |
||
3157 | sub [esp], ecx |
||
3158 | pop ecx |
||
3159 | jz .ret |
||
3160 | ; next sector |
||
3161 | inc ebp |
||
3162 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
3163 | jb @f |
||
3164 | xor ebp, ebp |
||
3165 | mov eax, edi |
||
3166 | call get_FAT |
||
3167 | mov edi, eax |
||
3168 | cmp [hd_error], 0 |
||
3169 | jnz .device_err |
||
3170 | @@: |
||
3171 | sub esi, 0x200 |
||
3172 | jae @f |
||
3173 | xor esi, esi |
||
3174 | @@: |
||
3175 | sub dword [esp], 0x200 |
||
3176 | jae @f |
||
3177 | and dword [esp], 0 |
||
3178 | @@: jmp .write_loop |
||
3179 | |||
3180 | hd_extend_file.zero_size: |
||
3181 | xor eax, eax |
||
3182 | jmp hd_extend_file.start_extend |
||
3183 | |||
3184 | ; extends file on hd to given size (new data area is undefined) |
||
3185 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 3186 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 3187 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
3188 | hd_extend_file: |
||
3189 | push ebp |
||
3190 | mov ebp, [SECTORS_PER_CLUSTER] |
||
3191 | imul ebp, [BYTES_PER_SECTOR] |
||
3192 | push ecx |
||
3193 | ; find the last cluster of file |
||
3194 | mov eax, [edi+20-2] |
||
3195 | mov ax, [edi+26] |
||
3196 | mov ecx, [edi+28] |
||
3197 | jecxz .zero_size |
||
3198 | .last_loop: |
||
3199 | sub ecx, ebp |
||
3200 | jbe .last_found |
||
3201 | call get_FAT |
||
3202 | cmp [hd_error], 0 |
||
3203 | jz @f |
||
3204 | .device_err: |
||
3205 | pop ecx |
||
3206 | .device_err2: |
||
3207 | pop ebp |
||
3208 | push 11 |
||
3209 | .ret_err: |
||
3210 | pop eax |
||
3211 | stc |
||
3212 | ret |
||
3213 | @@: |
||
3214 | cmp eax, 2 |
||
3215 | jb .fat_err |
||
3216 | cmp eax, [fatRESERVED] |
||
3217 | jb .last_loop |
||
3218 | .fat_err: |
||
3219 | pop ecx ebp |
||
3220 | push ERROR_FAT_TABLE |
||
3221 | jmp .ret_err |
||
3222 | .last_found: |
||
3223 | push eax |
||
3224 | call get_FAT |
||
3225 | cmp [hd_error], 0 |
||
3226 | jz @f |
||
3227 | pop eax |
||
3228 | jmp .device_err |
||
3229 | @@: |
||
3230 | cmp eax, [fatRESERVED] |
||
3231 | pop eax |
||
3232 | jb .fat_err |
||
3233 | ; set length to full number of clusters |
||
3234 | sub [edi+28], ecx |
||
3235 | .start_extend: |
||
3236 | pop ecx |
||
3237 | ; now do extend |
||
3238 | push edx |
||
3239 | mov edx, 2 ; start scan from cluster 2 |
||
3240 | .extend_loop: |
||
3241 | cmp [edi+28], ecx |
||
3242 | jae .extend_done |
||
3243 | ; add new cluster |
||
3244 | push eax |
||
3245 | mov eax, edx |
||
3246 | call get_free_FAT |
||
3247 | jc .disk_full |
||
3248 | mov edx, [fatEND] |
||
3249 | call set_FAT |
||
3250 | mov edx, eax |
||
3251 | pop eax |
||
3252 | test eax, eax |
||
3253 | jz .first_cluster |
||
3254 | push edx |
||
3255 | call set_FAT |
||
3256 | pop edx |
||
3257 | jmp @f |
||
3258 | .first_cluster: |
||
3259 | ror edx, 16 |
||
3260 | mov [edi+20], dx |
||
3261 | ror edx, 16 |
||
3262 | mov [edi+26], dx |
||
3263 | @@: |
||
133 | diamond | 3264 | push ecx |
3265 | mov ecx, -1 |
||
3266 | call add_disk_free_space |
||
3267 | pop ecx |
||
131 | diamond | 3268 | mov eax, edx |
3269 | cmp [hd_error], 0 |
||
3270 | jnz .device_err3 |
||
3271 | add [edi+28], ebp |
||
3272 | jmp .extend_loop |
||
3273 | .extend_done: |
||
3274 | mov [edi+28], ecx |
||
3275 | pop edx ebp |
||
133 | diamond | 3276 | xor eax, eax ; CF=0 |
131 | diamond | 3277 | ret |
3278 | .device_err3: |
||
3279 | pop edx |
||
3280 | jmp .device_err2 |
||
3281 | .disk_full: |
||
3282 | pop eax edx ebp |
||
3283 | push ERROR_DISK_FULL |
||
3284 | pop eax |
||
3285 | cmp [hd_error], 0 |
||
3286 | jz @f |
||
3287 | mov al, 11 |
||
3288 | @@: stc |
||
3289 | ret |
||
3290 | |||
133 | diamond | 3291 | ;---------------------------------------------------------------- |
3292 | ; |
||
3293 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
3294 | ; |
||
3295 | ; esi points to filename |
||
3296 | ; ebx points to 64-bit number = new file size |
||
3297 | ; ecx ignored (reserved) |
||
3298 | ; edx ignored (reserved) |
||
3299 | ; |
||
3300 | ; ret eax = 0 ok or other = errormsg |
||
3301 | ; |
||
3302 | ;-------------------------------------------------------------- |
||
3303 | fs_HdSetFileEnd: |
||
3304 | cmp [fat_type], 0 |
||
3305 | jnz @f |
||
3306 | push ERROR_UNKNOWN_FS |
||
3307 | .ret: |
||
3308 | pop eax |
||
3309 | ret |
||
3310 | @@: |
||
3311 | cmp byte [esi], 0 |
||
3312 | jnz @f |
||
3313 | .access_denied: |
||
3314 | push ERROR_ACCESS_DENIED |
||
3315 | jmp .ret |
||
3316 | @@: |
||
3317 | push edi |
||
3318 | call hd_find_lfn |
||
3319 | pushfd |
||
3320 | cmp [hd_error], 0 |
||
3321 | jz @f |
||
3322 | popfd |
||
3323 | push 11 |
||
3324 | jmp .ret |
||
3325 | @@: |
||
3326 | popfd |
||
3327 | jnc @f |
||
3328 | pop edi |
||
3329 | push ERROR_FILE_NOT_FOUND |
||
3330 | jmp .ret |
||
3331 | @@: |
||
3332 | ; must not be directory |
||
3333 | test byte [edi+11], 10h |
||
3334 | jz @f |
||
3335 | pop edi |
||
3336 | jmp .access_denied |
||
3337 | @@: |
||
3338 | ; file size must not exceed 4 Gb |
||
3339 | cmp dword [ebx+4], 0 |
||
3340 | jz @f |
||
3341 | pop edi |
||
3342 | push ERROR_END_OF_FILE |
||
3343 | jmp .ret |
||
3344 | @@: |
||
3345 | push eax ; save directory sector |
||
3346 | ; set file modification date/time to current |
||
3347 | call fat_update_datetime |
||
3348 | mov eax, [ebx] |
||
3349 | cmp eax, [edi+28] |
||
3350 | jb .truncate |
||
3351 | ja .expand |
||
3352 | pop eax |
||
3353 | mov ebx, buffer |
||
3354 | call hd_write |
||
3355 | pop edi |
||
3356 | xor eax, eax |
||
3357 | cmp [hd_error], 0 |
||
3358 | jz @f |
||
3359 | mov al, 11 |
||
3360 | @@: |
||
3361 | ret |
||
3362 | .expand: |
||
3363 | push ebx ebp ecx |
||
3364 | push dword [edi+28] ; save old size |
||
3365 | mov ecx, eax |
||
3366 | call hd_extend_file |
||
3367 | push eax ; return code |
||
3368 | jnc .expand_ok |
||
3369 | cmp al, ERROR_DISK_FULL |
||
3370 | jz .disk_full |
||
3371 | .pop_ret: |
||
3372 | call update_disk |
||
3373 | pop eax ecx ebp ebx ecx edi edi |
||
3374 | ret |
||
3375 | .expand_ok: |
||
3376 | .disk_full: |
||
3377 | ; save directory |
||
3378 | mov eax, [edi+28] |
||
3379 | xchg eax, [esp+20] |
||
3380 | mov ebx, buffer |
||
3381 | call hd_write |
||
3382 | mov eax, [edi+20-2] |
||
3383 | mov ax, [edi+26] |
||
3384 | mov edi, eax |
||
3385 | cmp [hd_error], 0 |
||
3386 | jz @f |
||
3387 | .pop_ret11: |
||
3388 | mov byte [esp], 11 |
||
3389 | jmp .pop_ret |
||
3390 | @@: |
||
3391 | ; now zero new data |
||
3392 | xor ebp, ebp |
||
3393 | ; edi=current cluster, ebp=sector in cluster |
||
3394 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
||
3395 | .zero_loop: |
||
3396 | sub dword [esp+4], 0x200 |
||
3397 | jae .next_cluster |
||
3398 | lea eax, [edi-2] |
||
3399 | imul eax, [SECTORS_PER_CLUSTER] |
||
3400 | add eax, [DATA_START] |
||
3401 | add eax, ebp |
||
3402 | cmp dword [esp+4], -0x200 |
||
3403 | jz .noread |
||
3404 | mov ebx, buffer |
||
3405 | call hd_read |
||
3406 | cmp [hd_error], 0 |
||
3407 | jnz .err_next |
||
3408 | .noread: |
||
3409 | mov ecx, [esp+4] |
||
3410 | neg ecx |
||
3411 | push edi |
||
3412 | mov edi, buffer+0x200 |
||
3413 | add edi, [esp+8] |
||
3414 | push eax |
||
3415 | xor eax, eax |
||
3416 | mov [esp+12], eax |
||
3417 | rep stosb |
||
3418 | pop eax |
||
3419 | pop edi |
||
3420 | call hd_write |
||
3421 | cmp [hd_error], 0 |
||
3422 | jz .next_cluster |
||
3423 | .err_next: |
||
3424 | mov byte [esp], 11 |
||
3425 | .next_cluster: |
||
3426 | sub dword [esp+20], 0x200 |
||
3427 | jbe .pop_ret |
||
3428 | inc ebp |
||
3429 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
3430 | jb .zero_loop |
||
3431 | xor ebp, ebp |
||
3432 | mov eax, edi |
||
3433 | call get_FAT |
||
3434 | mov edi, eax |
||
3435 | cmp [hd_error], 0 |
||
3436 | jnz .pop_ret11 |
||
3437 | jmp .zero_loop |
||
3438 | .truncate: |
||
3439 | mov [edi+28], eax |
||
3440 | push ecx |
||
3441 | mov ecx, [edi+20-2] |
||
3442 | mov cx, [edi+26] |
||
3443 | push eax |
||
3444 | test eax, eax |
||
3445 | jz .zero_size |
||
3446 | ; find new last cluster |
||
3447 | @@: |
||
3448 | mov eax, [SECTORS_PER_CLUSTER] |
||
3449 | shl eax, 9 |
||
3450 | sub [esp], eax |
||
3451 | jbe @f |
||
3452 | mov eax, ecx |
||
3453 | call get_FAT |
||
3454 | mov ecx, eax |
||
3455 | cmp [hd_error], 0 |
||
3456 | jz @b |
||
3457 | .device_err3: |
||
3458 | pop eax ecx eax edi |
||
3459 | push 11 |
||
3460 | pop eax |
||
3461 | ret |
||
3462 | @@: |
||
3463 | ; we will zero data at the end of last sector - remember it |
||
3464 | push ecx |
||
3465 | ; terminate FAT chain |
||
3466 | push edx |
||
3467 | mov eax, ecx |
||
3468 | mov edx, [fatEND] |
||
3469 | call set_FAT |
||
3470 | mov eax, edx |
||
3471 | pop edx |
||
3472 | cmp [hd_error], 0 |
||
3473 | jz @f |
||
3474 | .device_err4: |
||
3475 | pop ecx |
||
3476 | jmp .device_err3 |
||
3477 | .zero_size: |
||
3478 | and word [edi+20], 0 |
||
3479 | and word [edi+26], 0 |
||
3480 | push 0 |
||
3481 | mov eax, ecx |
||
3482 | @@: |
||
3483 | ; delete FAT chain |
||
3484 | call clear_cluster_chain |
||
3485 | cmp [hd_error], 0 |
||
3486 | jnz .device_err4 |
||
3487 | ; save directory |
||
3488 | mov eax, [esp+12] |
||
3489 | push ebx |
||
3490 | mov ebx, buffer |
||
3491 | call hd_write |
||
3492 | pop ebx |
||
3493 | cmp [hd_error], 0 |
||
3494 | jnz .device_err4 |
||
3495 | ; zero last sector, ignore errors |
||
3496 | pop ecx |
||
3497 | pop eax |
||
3498 | dec ecx |
||
3499 | imul ecx, [SECTORS_PER_CLUSTER] |
||
3500 | add ecx, [DATA_START] |
||
3501 | push eax |
||
3502 | sar eax, 9 |
||
3503 | add ecx, eax |
||
3504 | pop eax |
||
3505 | and eax, 0x1FF |
||
3506 | jz .truncate_done |
||
3507 | push ebx eax |
||
3508 | mov eax, ecx |
||
3509 | mov ebx, buffer |
||
3510 | call hd_read |
||
3511 | pop eax |
||
3512 | lea edi, [buffer+eax] |
||
3513 | push ecx |
||
3514 | mov ecx, 0x200 |
||
3515 | sub ecx, eax |
||
3516 | xor eax, eax |
||
3517 | rep stosb |
||
3518 | pop eax |
||
3519 | call hd_write |
||
3520 | pop ebx |
||
3521 | .truncate_done: |
||
3522 | pop ecx eax edi |
||
3523 | call update_disk |
||
3524 | xor eax, eax |
||
3525 | cmp [hd_error], 0 |
||
3526 | jz @f |
||
3527 | mov al, 11 |
||
3528 | @@: |
||
3529 | ret |
||
3530 | |||
86 | diamond | 3531 | fs_HdGetFileInfo: |
3532 | cmp [fat_type], 0 |
||
3533 | jnz @f |
||
3534 | mov eax, ERROR_UNKNOWN_FS |
||
3535 | ret |
||
3536 | @@: |
||
3537 | cmp byte [esi], 0 |
||
3538 | jnz @f |
||
3539 | mov eax, 2 |
||
3540 | ret |
||
3541 | @@: |
||
3542 | push edi |
||
3543 | call hd_find_lfn |
||
3544 | pushfd |
||
3545 | cmp [hd_error], 0 |
||
3546 | jz @f |
||
3547 | popfd |
||
3548 | pop edi |
||
3549 | mov eax, 11 |
||
3550 | ret |
||
3551 | @@: |
||
3552 | popfd |
||
3553 | jmp fs_GetFileInfo_finish |
||
3554 | |||
3555 | fs_HdSetFileInfo: |
||
3556 | cmp [fat_type], 0 |
||
3557 | jnz @f |
||
3558 | mov eax, ERROR_UNKNOWN_FS |
||
3559 | ret |
||
3560 | @@: |
||
3561 | cmp byte [esi], 0 |
||
3562 | jnz @f |
||
3563 | mov eax, 2 |
||
3564 | ret |
||
3565 | @@: |
||
3566 | push edi |
||
3567 | call hd_find_lfn |
||
3568 | pushfd |
||
3569 | cmp [hd_error], 0 |
||
3570 | jz @f |
||
3571 | popfd |
||
3572 | pop edi |
||
3573 | mov eax, 11 |
||
3574 | ret |
||
3575 | @@: |
||
3576 | popfd |
||
3577 | jnc @f |
||
3578 | pop edi |
||
3579 | mov eax, ERROR_FILE_NOT_FOUND |
||
3580 | ret |
||
3581 | @@: |
||
3582 | push eax |
||
3583 | call bdfe_to_fat_entry |
||
3584 | pop eax |
||
3585 | mov ebx, buffer |
||
3586 | call hd_write |
||
3587 | call update_disk |
||
3588 | pop edi |
||
3589 | xor eax, eax |
||
3590 | ret |
||
3591 | |||
91 | diamond | 3592 | ;---------------------------------------------------------------- |
3593 | ; |
||
3594 | ; fs_HdExecute - LFN variant for executing from harddisk |
||
3595 | ; |
||
3596 | ; esi points to hd filename (e.g. 'dir1/name') |
||
3597 | ; ebp points to full filename (e.g. '/hd0/1/dir1/name') |
||
3598 | ; dword [ebx] = flags |
||
3599 | ; dword [ebx+4] = cmdline |
||
3600 | ; |
||
3601 | ; ret ebx,edx destroyed |
||
3602 | ; eax > 0 - PID, < 0 - error |
||
3603 | ; |
||
3604 | ;-------------------------------------------------------------- |
||
3605 | fs_HdExecute: |
||
3606 | mov edx, [ebx] |
||
3607 | mov ebx, [ebx+4] |
||
3608 | test ebx, ebx |
||
3609 | jz @f |
||
3610 | add ebx, std_application_base_address |
||
3611 | @@: |
||
3612 | |||
3613 | ;---------------------------------------------------------------- |
||
3614 | ; |
||
3615 | ; fs_HdExecute.flags - second entry |
||
3616 | ; |
||
3617 | ; esi points to floppy filename (kernel address) |
||
3618 | ; ebp points to full filename |
||
3619 | ; edx flags |
||
3620 | ; ebx cmdline (kernel address) |
||
3621 | ; |
||
3622 | ; ret eax > 0 - PID, < 0 - error |
||
3623 | ; |
||
3624 | ;-------------------------------------------------------------- |
||
3625 | |||
3626 | .flags: |
||
3627 | cmp [fat_type], 0 |
||
3628 | jnz @f |
||
171 | diamond | 3629 | mov eax, -ERROR_UNKNOWN_FS |
91 | diamond | 3630 | ret |
3631 | @@: |
||
3632 | cmp byte [esi], 0 |
||
3633 | jnz @f |
||
3634 | ; cannot execute root! |
||
3635 | mov eax, -ERROR_ACCESS_DENIED |
||
3636 | ret |
||
3637 | @@: |
||
3638 | push edi |
||
3639 | call hd_find_lfn |
||
3640 | jnc .found |
||
3641 | pop edi |
||
3642 | mov eax, -ERROR_FILE_NOT_FOUND |
||
3643 | cmp [hd_error], 0 |
||
3644 | jz @f |
||
3645 | mov al, -11 |
||
3646 | @@: |
||
3647 | ret |
||
3648 | .found: |
||
3649 | mov eax, [edi+20-2] |
||
3650 | mov ax, [edi+26] |
||
3651 | push 0 |
||
3652 | push eax |
||
3653 | push dword [edi+28] ; size |
||
3654 | push .DoRead |
||
3655 | call fs_execute |
||
3656 | add esp, 16 |
||
3657 | pop edi |
||
3658 | ret |
||
3659 | |||
3660 | .DoRead: |
||
3661 | ; read next block |
||
3662 | ; in: eax->parameters, edi->buffer |
||
3663 | ; out: eax = error code |
||
3664 | pushad |
||
3665 | cmp dword [eax], 0 ; file size |
||
3666 | jz .eof |
||
3667 | add eax, 4 |
||
3668 | call fat_get_sector |
||
3669 | mov ebx, edi |
||
3670 | call hd_read |
||
3671 | cmp [hd_error], 0 |
||
3672 | jnz .err |
||
3673 | mov eax, [esp+28] |
||
3674 | mov ecx, [eax] |
||
3675 | sub ecx, 512 |
||
3676 | jae @f |
||
3677 | lea edi, [edi+ecx+512] |
||
3678 | neg ecx |
||
3679 | push eax |
||
3680 | xor eax, eax |
||
3681 | rep stosb |
||
3682 | pop eax |
||
3683 | @@: |
||
3684 | mov [eax], ecx |
||
3685 | mov edx, [eax+8] |
||
3686 | inc edx |
||
3687 | cmp edx, [SECTORS_PER_CLUSTER] |
||
3688 | jb @f |
||
3689 | push eax |
||
3690 | mov eax, [eax+4] |
||
3691 | call get_FAT |
||
3692 | cmp [hd_error], 0 |
||
3693 | jnz .err |
||
3694 | mov ecx, eax |
||
3695 | pop eax |
||
3696 | mov [eax+4], ecx |
||
3697 | xor edx, edx |
||
3698 | @@: |
||
3699 | mov [eax+8], edx |
||
3700 | popad |
||
3701 | xor eax, eax |
||
3702 | ret |
||
3703 | .eof: |
||
3704 | popad |
||
3705 | mov eax, 6 |
||
3706 | ret |
||
3707 | .err: |
||
3708 | popad |
||
3709 | mov eax, 11 |
||
3710 | ret |
||
3711 | |||
171 | diamond | 3712 | ;---------------------------------------------------------------- |
3713 | ; |
||
3714 | ; fs_HdDelete - delete file or empty folder from hard disk |
||
3715 | ; |
||
3716 | ; esi points to filename |
||
3717 | ; |
||
3718 | ; ret eax = 0 ok or other = errormsg |
||
3719 | ; |
||
3720 | ;-------------------------------------------------------------- |
||
3721 | fs_HdDelete: |
||
3722 | cmp [fat_type], 0 |
||
3723 | jnz @f |
||
3724 | push ERROR_UNKNOWN_FS |
||
3725 | .pop_ret: |
||
3726 | pop eax |
||
3727 | ret |
||
3728 | @@: |
||
3729 | cmp byte [esi], 0 |
||
3730 | jnz @f |
||
3731 | ; cannot delete root! |
||
3732 | .access_denied: |
||
3733 | push ERROR_ACCESS_DENIED |
||
3734 | jmp .pop_ret |
||
3735 | @@: |
||
3736 | and [longname_sec1], 0 |
||
3737 | and [longname_sec2], 0 |
||
3738 | push edi |
||
3739 | call hd_find_lfn |
||
3740 | jnc .found |
||
3741 | pop edi |
||
3742 | push ERROR_FILE_NOT_FOUND |
||
3743 | jmp .pop_ret |
||
3744 | .found: |
||
3745 | cmp dword [edi], '. ' |
||
3746 | jz .access_denied2 |
||
3747 | cmp dword [edi], '.. ' |
||
3748 | jz .access_denied2 |
||
3749 | test byte [edi+11], 10h |
||
3750 | jz .dodel |
||
3751 | ; we can delete only empty folders! |
||
3752 | pushad |
||
3753 | mov ebp, [edi+20-2] |
||
3754 | mov bp, [edi+26] |
||
3755 | xor ecx, ecx |
||
3756 | lea eax, [ebp-2] |
||
3757 | imul eax, [SECTORS_PER_CLUSTER] |
||
3758 | add eax, [DATA_START] |
||
3759 | mov ebx, buffer |
||
3760 | call hd_read |
||
3761 | cmp [hd_error], 0 |
||
3762 | jnz .err1 |
||
3763 | add ebx, 2*0x20 |
||
3764 | .checkempty: |
||
3765 | cmp byte [ebx], 0 |
||
3766 | jz .empty |
||
3767 | cmp byte [ebx], 0xE5 |
||
3768 | jnz .notempty |
||
3769 | add ebx, 0x20 |
||
3770 | cmp ebx, buffer+0x200 |
||
3771 | jb .checkempty |
||
3772 | inc ecx |
||
3773 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
3774 | jb @f |
||
3775 | mov eax, ebp |
||
3776 | call get_FAT |
||
3777 | cmp [hd_error], 0 |
||
3778 | jnz .err1 |
||
3779 | mov ebp, eax |
||
3780 | xor ecx, ecx |
||
3781 | @@: |
||
3782 | lea eax, [ebp-2] |
||
3783 | imul eax, [SECTORS_PER_CLUSTER] |
||
3784 | add eax, [DATA_START] |
||
3785 | add eax, ecx |
||
3786 | mov ebx, buffer |
||
3787 | call hd_read |
||
3788 | cmp [hd_error], 0 |
||
3789 | jz .checkempty |
||
3790 | .err1: |
||
3791 | popad |
||
3792 | .err2: |
||
3793 | pop edi |
||
3794 | push 11 |
||
3795 | pop eax |
||
3796 | ret |
||
3797 | .notempty: |
||
3798 | popad |
||
3799 | .access_denied2: |
||
3800 | pop edi |
||
3801 | push ERROR_ACCESS_DENIED |
||
3802 | pop eax |
||
3803 | ret |
||
3804 | .empty: |
||
3805 | popad |
||
3806 | push ebx |
||
3807 | mov ebx, buffer |
||
3808 | call hd_read |
||
3809 | pop ebx |
||
3810 | cmp [hd_error], 0 |
||
3811 | jnz .err2 |
||
3812 | .dodel: |
||
3813 | push eax |
||
3814 | mov eax, [edi+20-2] |
||
3815 | mov ax, [edi+26] |
||
3816 | xchg eax, [esp] |
||
3817 | ; delete folder entry |
||
3818 | mov byte [edi], 0xE5 |
||
3819 | ; delete LFN (if present) |
||
3820 | .lfndel: |
||
3821 | cmp edi, buffer |
||
3822 | ja @f |
||
3823 | cmp [longname_sec2], 0 |
||
3824 | jz .lfndone |
||
3825 | push [longname_sec2] |
||
3826 | push [longname_sec1] |
||
3827 | pop [longname_sec2] |
||
3828 | and [longname_sec1], 0 |
||
3829 | push ebx |
||
3830 | mov ebx, buffer |
||
3831 | call hd_write |
||
3832 | mov eax, [esp+4] |
||
3833 | call hd_read |
||
3834 | pop ebx |
||
3835 | pop eax |
||
3836 | mov edi, buffer+0x200 |
||
3837 | @@: |
||
3838 | sub edi, 0x20 |
||
3839 | cmp byte [edi], 0xE5 |
||
3840 | jz .lfndone |
||
3841 | cmp byte [edi+11], 0xF |
||
3842 | jnz .lfndone |
||
3843 | mov byte [edi], 0xE5 |
||
3844 | jmp .lfndel |
||
3845 | .lfndone: |
||
3846 | push ebx |
||
3847 | mov ebx, buffer |
||
3848 | call hd_write |
||
3849 | pop ebx |
||
3850 | ; delete FAT chain |
||
3851 | pop eax |
||
3852 | call clear_cluster_chain |
||
3853 | call update_disk |
||
3854 | pop edi |
||
3855 | xor eax, eax |
||
3856 | cmp [hd_error], 0 |
||
3857 | jz @f |
||
3858 | mov al, 11 |
||
3859 | @@: |
||
3860 | ret |
||
3861 | |||
74 | mario79 | 3862 | ; \end{diamond}>>=>=>>>> |