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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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5 | ;; FAT16/32 functions for MenuetOS ;; |
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6 | ;; ;; |
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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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91 | diamond | 10 | ;; 23.06.2006 LFN start application - diamond ;; |
86 | diamond | 11 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
83 | diamond | 12 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
75 | diamond | 13 | ;; 04.05.2006 LFN read folder - diamond ;; |
74 | mario79 | 14 | ;; 29.04.2006 Elimination of hangup after the ;; |
15 | ;; expiration hd_wait_timeout - Mario79 ;; |
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75 | diamond | 16 | ;; 23.04.2006 LFN read file - diamond ;; |
65 | mario79 | 17 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
18 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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1 | ha | 19 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
20 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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21 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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22 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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23 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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24 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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25 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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26 | ;; 08.11.2004 rename - ATV ;; |
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27 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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28 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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29 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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30 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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31 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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32 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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33 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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34 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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35 | ;; 20.5.2002 Hd status check - VT ;; |
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36 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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37 | ;; ;; |
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38 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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39 | |||
40 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
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41 | |||
52 | mikedld | 42 | ERROR_SUCCESS = 0 |
43 | ERROR_DISK_BASE = 1 |
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44 | ERROR_UNSUPPORTED_FS = 2 |
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45 | ERROR_UNKNOWN_FS = 3 |
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46 | ERROR_PARTITION = 4 |
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47 | ERROR_FILE_NOT_FOUND = 5 |
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48 | ERROR_END_OF_FILE = 6 |
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49 | ERROR_MEMORY_POINTER = 7 |
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50 | ERROR_DISK_FULL = 8 |
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51 | ERROR_FAT_TABLE = 9 |
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52 | ERROR_ACCESS_DENIED = 10 |
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1 | ha | 53 | |
54 | PUSHAD_EAX equ [esp+28] |
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55 | PUSHAD_ECX equ [esp+24] |
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56 | PUSHAD_EDX equ [esp+20] |
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57 | PUSHAD_EBX equ [esp+16] |
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58 | PUSHAD_EBP equ [esp+8] |
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59 | PUSHAD_ESI equ [esp+4] |
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60 | PUSHAD_EDI equ [esp+0] |
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61 | |||
62 | cluster dd 0 ; used by file_write,makedir,append |
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63 | partition_count dd 0 ; partitions found by set_FAT32_variables |
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64 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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65 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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66 | |||
67 | hd_error dd 0 ; set by wait_for_sector_buffer |
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68 | hd_setup dd 0 |
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69 | hd_wait_timeout dd 0 |
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70 | |||
71 | cluster_tmp dd 0 ; used by analyze_directory |
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72 | ; and analyze_directory_to_write |
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73 | |||
74 | file_size dd 0 ; used by file_read |
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75 | |||
76 | sector_tmp dd 0 ; used by rename,append,file_write |
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77 | entry_pos dd 0 ; used by rename,append,file_write |
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78 | |||
79 | old_filesize dd 0 ; used by append |
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80 | new_filepos dd 0 ; used by append |
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81 | bytes2write dd 0 ; used by append |
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82 | |||
83 | cache_search_start dd 0 ; used by find_empty_slot |
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84 | |||
85 | fat_in_cache dd -1 |
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86 | fat_cache: times 512 db 0 |
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87 | |||
88 | uglobal |
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89 | Sector512: ; label for dev_hdcd.inc |
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90 | buffer: times 512 db 0 |
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91 | deltree_buffer: times 512 db 0 |
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92 | endg |
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93 | |||
94 | iglobal |
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95 | NewDirEntry1 db ". ",0x10 |
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96 | times 20 db 0 |
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97 | NewDirEntry2 db ".. ",0x10 |
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98 | times 20 db 0 |
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99 | endg |
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100 | |||
101 | uglobal |
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102 | dir_entry: times 32 db 0 |
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103 | |||
104 | startpath: times 255 db 0 |
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105 | |||
106 | fat16_root db 0 ; flag for fat16 rootdir |
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107 | f_del db 0 ; 1=overwrite fat entry |
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108 | fat_change db 0 ; 1=fat has changed |
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109 | |||
110 | endg |
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111 | |||
112 | reserve_hd1: |
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113 | |||
114 | cli |
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115 | cmp [hd1_status],0 |
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116 | je reserve_ok1 |
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117 | |||
118 | sti |
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119 | call change_task |
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120 | jmp reserve_hd1 |
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121 | |||
122 | reserve_ok1: |
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123 | |||
124 | push eax |
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125 | mov eax,[0x3000] |
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126 | shl eax,5 |
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127 | mov eax,[eax+0x3000+4] |
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128 | mov [hd1_status],eax |
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129 | pop eax |
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130 | sti |
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131 | ret |
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95 | mario79 | 132 | ;******************************************** |
133 | reserve_hd_channel: |
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134 | cmp [hdbase], 0x1F0 |
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135 | jne .IDE_Channel_2 |
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136 | .IDE_Channel_1: |
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137 | cli |
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138 | cmp [IDE_Channel_1],0 |
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139 | je .reserve_ok_1 |
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140 | sti |
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141 | call change_task |
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142 | jmp .IDE_Channel_1 |
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143 | .IDE_Channel_2: |
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144 | cli |
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145 | cmp [IDE_Channel_2],0 |
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146 | je .reserve_ok_2 |
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147 | sti |
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148 | call change_task |
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149 | jmp .IDE_Channel_1 |
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150 | .reserve_ok_1: |
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151 | mov [IDE_Channel_1],1 |
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152 | ret |
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153 | .reserve_ok_2: |
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154 | mov [IDE_Channel_2],1 |
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155 | ret |
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156 | |||
157 | free_hd_channel: |
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158 | cmp [hdbase], 0x1F0 |
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159 | jne .IDE_Channel_2 |
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160 | .IDE_Channel_1: |
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161 | mov [IDE_Channel_1],0 |
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162 | ret |
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163 | .IDE_Channel_2: |
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164 | mov [IDE_Channel_2],0 |
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165 | ret |
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166 | ;******************************************** |
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1 | ha | 167 | clear_hd_cache: |
168 | |||
169 | push eax ecx edi |
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170 | mov edi,0x600000 |
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171 | mov ecx,16384 |
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172 | xor eax,eax |
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173 | cld |
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174 | rep stosd ; clear hd cache with 0 |
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175 | mov [cache_search_start],eax |
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176 | mov [fat_in_cache],-1 |
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177 | mov [fat_change],0 |
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178 | pop edi ecx eax |
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179 | ret |
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180 | |||
181 | problem_partition db 0 ; used for partitions search |
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182 | |||
65 | mario79 | 183 | include 'part_set.inc' |
1 | ha | 184 | |
185 | set_FAT: |
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186 | ;-------------------------------- |
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187 | ; input : EAX = cluster |
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188 | ; EDX = value to save |
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189 | ; output : EDX = old value |
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190 | ;-------------------------------- |
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191 | push eax ebx esi |
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192 | |||
193 | cmp eax,2 |
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194 | jb sfc_error |
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195 | cmp eax,[LAST_CLUSTER] |
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196 | ja sfc_error |
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197 | cmp [fat_type],16 |
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198 | je sfc_1 |
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199 | add eax,eax |
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200 | sfc_1: |
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201 | add eax,eax |
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202 | mov esi,511 |
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203 | and esi,eax ; esi = position in fat sector |
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204 | shr eax,9 ; eax = fat sector |
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205 | add eax,[FAT_START] |
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206 | mov ebx,fat_cache |
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207 | |||
208 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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209 | je sfc_in_cache ; yes |
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210 | |||
211 | cmp [fat_change],0 ; is fat changed? |
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212 | je sfc_no_change ; no |
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213 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 214 | cmp [hd_error],0 |
215 | jne sfc_error |
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1 | ha | 216 | |
217 | sfc_no_change: |
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218 | mov [fat_in_cache],eax ; save fat sector |
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219 | call hd_read |
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74 | mario79 | 220 | cmp [hd_error],0 |
221 | jne sfc_error |
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222 | |||
1 | ha | 223 | |
224 | sfc_in_cache: |
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225 | cmp [fat_type],16 |
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226 | jne sfc_test32 |
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227 | |||
228 | cmp [f_del],1 ; overwrite previous value? |
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229 | je sfc_set16 ; yes |
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230 | cmp word [ebx+esi],0 ; is cluster free? |
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231 | je sfc_set16 ; yes |
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232 | mov dword [8*0x100000],0xffffff |
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233 | mov edx,[ebx+esi] ; get old value |
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234 | jmp sfc_nonzero |
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235 | |||
236 | sfc_set16: |
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237 | xchg [ebx+esi],dx ; save new value and get old value |
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238 | jmp sfc_write |
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239 | |||
240 | sfc_test32: |
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241 | mov eax,[fatMASK] |
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242 | cmp [f_del],1 ; overwrite previous value? |
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243 | je sfc_set32 ; yes |
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244 | test eax,[ebx+esi] ; is cluster free? |
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245 | je sfc_set32 ; yes |
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246 | mov dword [8*0x100000],0xffffff |
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247 | mov edx,[ebx+esi] ; get old value |
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248 | jmp sfc_nonzero |
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249 | |||
250 | sfc_set32: |
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251 | and edx,eax |
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252 | xor eax,-1 ; mask for high bits |
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253 | and eax,[ebx+esi] ; get high 4 bits |
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254 | or eax,edx |
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255 | mov edx,[ebx+esi] ; get old value |
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256 | mov [ebx+esi],eax ; save new value |
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257 | |||
258 | sfc_write: |
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259 | mov [fat_change],1 ; fat has changed |
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260 | |||
261 | sfc_nonzero: |
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262 | and edx,[fatMASK] |
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263 | |||
264 | sfc_error: |
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265 | pop esi ebx eax |
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266 | ret |
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267 | |||
268 | |||
269 | get_FAT: |
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270 | ;-------------------------------- |
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271 | ; input : EAX = cluster |
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272 | ; output : EAX = next cluster |
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273 | ;-------------------------------- |
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274 | push ebx esi |
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275 | |||
276 | cmp [fat_type],16 |
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277 | je gfc_1 |
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278 | add eax,eax |
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279 | gfc_1: |
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280 | add eax,eax |
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281 | mov esi,511 |
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282 | and esi,eax ; esi = position in fat sector |
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283 | shr eax,9 ; eax = fat sector |
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284 | add eax,[FAT_START] |
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285 | mov ebx,fat_cache |
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286 | |||
287 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
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288 | je gfc_in_cache |
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289 | |||
290 | cmp [fat_change],0 ; is fat changed? |
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291 | je gfc_no_change ; no |
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292 | call write_fat_sector ; yes. write it into disk |
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74 | mario79 | 293 | cmp [hd_error],0 |
294 | jne hd_error_01 |
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1 | ha | 295 | |
296 | gfc_no_change: |
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297 | mov [fat_in_cache],eax |
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298 | call hd_read |
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74 | mario79 | 299 | cmp [hd_error],0 |
300 | jne hd_error_01 |
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1 | ha | 301 | |
302 | gfc_in_cache: |
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303 | mov eax,[ebx+esi] |
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304 | and eax,[fatMASK] |
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74 | mario79 | 305 | hd_error_01: |
1 | ha | 306 | pop esi ebx |
307 | ret |
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308 | |||
309 | |||
310 | get_free_FAT: |
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311 | ;----------------------------------------------------------- |
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312 | ; input : EAX = # cluster for start the searching |
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313 | ; output : if CARRY=0 EAX = # first cluster found free |
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314 | ; if CARRY=1 disk full |
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315 | ; Note : for more speed need to use fat_cache directly |
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316 | ;----------------------------------------------------------- |
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317 | push ecx |
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318 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
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319 | sub ecx,2 |
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320 | |||
321 | gff_test: |
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322 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
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323 | jbe gff_in_range |
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324 | mov eax,2 |
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325 | |||
326 | gff_in_range: |
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327 | push eax |
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328 | call get_FAT ; get cluster state |
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74 | mario79 | 329 | cmp [hd_error],0 |
330 | jne gff_not_found_1 |
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331 | |||
1 | ha | 332 | test eax,eax ; is it free? |
333 | pop eax |
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334 | je gff_found ; yes |
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335 | inc eax ; next cluster |
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336 | dec ecx ; is all checked? |
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337 | jns gff_test ; no |
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338 | |||
74 | mario79 | 339 | gff_not_found_1: |
340 | add esp,4 |
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1 | ha | 341 | gff_not_found: |
342 | pop ecx ; yes. disk is full |
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343 | stc |
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344 | ret |
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345 | |||
346 | gff_found: |
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347 | pop ecx |
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348 | clc |
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349 | ret |
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350 | |||
351 | |||
352 | write_fat_sector: |
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353 | ;----------------------------------------------------------- |
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354 | ; write changed fat to disk |
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355 | ;----------------------------------------------------------- |
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356 | push eax ebx ecx |
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357 | |||
358 | mov [fat_change],0 |
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359 | mov eax,[fat_in_cache] |
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360 | cmp eax,-1 |
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361 | jz write_fat_not_used |
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362 | mov ebx,fat_cache |
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363 | mov ecx,[NUMBER_OF_FATS] |
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364 | |||
365 | write_next_fat: |
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366 | call hd_write |
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74 | mario79 | 367 | cmp [hd_error],0 |
368 | jne write_fat_not_used |
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369 | |||
1 | ha | 370 | add eax,[SECTORS_PER_FAT] |
371 | dec ecx |
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372 | jnz write_next_fat |
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373 | |||
374 | write_fat_not_used: |
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375 | pop ecx ebx eax |
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376 | ret |
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377 | |||
378 | |||
379 | analyze_directory: |
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380 | ;----------------------------------------------------------- |
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381 | ; input : EAX = first cluster of the directory |
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382 | ; EBX = pointer to filename |
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383 | ; output : IF CARRY=0 EAX = sector where th file is found |
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384 | ; EBX = pointer in buffer |
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385 | ; [buffer .. buffer+511] |
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386 | ; ECX,EDX,ESI,EDI not changed |
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387 | ; IF CARRY=1 filename not found |
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388 | ; Note : if cluster=0 it's changed to read rootdir |
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389 | ; save 2 previous directory sectors in longname_sec |
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390 | ;----------------------------------------------------------- |
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391 | push ecx edx esi edi ebx ; ebx = [esp+0] |
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392 | mov [longname_sec1],0 |
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393 | mov [longname_sec2],0 |
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394 | |||
395 | adr_new_cluster: |
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396 | mov [cluster_tmp],eax |
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397 | mov [fat16_root],0 |
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398 | cmp eax,[LAST_CLUSTER] |
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399 | ja adr_not_found ; too big cluster number, something is wrong |
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400 | cmp eax,2 |
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401 | jnb adr_data_cluster |
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402 | |||
403 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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404 | cmp [fat_type],16 |
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405 | jne adr_data_cluster |
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406 | mov eax,[ROOT_START] |
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407 | mov edx,[ROOT_SECTORS] |
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408 | mov [fat16_root],1 ; flag for fat16 rootdir |
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409 | jmp adr_new_sector |
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410 | |||
411 | adr_data_cluster: |
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412 | sub eax,2 |
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413 | mov edx,[SECTORS_PER_CLUSTER] |
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414 | imul eax,edx |
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415 | add eax,[DATA_START] |
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416 | |||
417 | adr_new_sector: |
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418 | mov ebx,buffer |
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419 | call hd_read |
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74 | mario79 | 420 | cmp [hd_error],0 |
421 | jne adr_not_found |
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422 | |||
1 | ha | 423 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
424 | |||
425 | adr_analyze: |
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426 | mov edi,[ebx+11] ; file attribute |
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427 | and edi,0xf |
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428 | cmp edi,0xf |
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429 | je adr_long_filename |
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430 | test edi,0x8 ; skip over volume label |
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431 | jne adr_long_filename ; Note: label can be same name as file/dir |
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432 | |||
433 | mov esi,[esp+0] ; filename need to be uppercase |
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434 | mov edi,ebx |
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435 | push ecx |
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436 | mov ecx,11 |
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437 | cld |
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438 | rep cmpsb ; compare 8+3 filename |
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439 | pop ecx |
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440 | je adr_found |
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441 | |||
442 | adr_long_filename: |
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443 | add ebx,32 ; position of next dir entry |
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444 | dec ecx |
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445 | jnz adr_analyze |
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446 | |||
447 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
||
448 | mov [longname_sec1],eax ; for delete long filename |
||
449 | mov [longname_sec2],ecx |
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450 | inc eax ; next sector |
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451 | dec edx |
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452 | jne adr_new_sector |
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453 | cmp [fat16_root],1 ; end of fat16 rootdir |
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454 | je adr_not_found |
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455 | |||
456 | adr_next_cluster: |
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457 | mov eax,[cluster_tmp] |
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458 | call get_FAT ; get next cluster |
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74 | mario79 | 459 | cmp [hd_error],0 |
460 | jne adr_not_found |
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461 | |||
1 | ha | 462 | cmp eax,2 ; incorrect fat chain? |
463 | jb adr_not_found ; yes |
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464 | cmp eax,[fatRESERVED] ; is it end of directory? |
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465 | jb adr_new_cluster ; no. analyse it |
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466 | |||
467 | adr_not_found: |
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468 | pop edi edi esi edx ecx ; first edi will remove ebx |
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469 | stc ; file not found |
||
470 | ret |
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471 | |||
472 | adr_found: |
||
473 | pop edi edi esi edx ecx ; first edi will remove ebx |
||
474 | clc ; file found |
||
475 | ret |
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476 | |||
477 | |||
478 | analyze_directory_to_write: |
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479 | ;----------------------------------------------------------- |
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480 | ; input : EAX = first cluster of the directory |
||
481 | ; output : IF CARRY=0 EAX = sector where the empty pos is found |
||
482 | ; EBX = pointer in buffer |
||
483 | ; [buffer .. buffer+511] |
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484 | ; ECX,EDX,ESI,EDI not changed |
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485 | ; IF CARRY=1 disk full or fat corrupted |
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486 | ; Note : if cluster=0 it's changed to read rootdir |
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487 | ;----------------------------------------------------------- |
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488 | push ecx edx edi |
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489 | |||
490 | adw_new_cluster: |
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491 | mov [cluster_tmp],eax |
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492 | mov [fat16_root],0 |
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493 | cmp eax,[LAST_CLUSTER] |
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494 | ja adw_not_found ; too big cluster number, something is wrong |
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495 | cmp eax,2 |
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496 | jnb adw_data_cluster |
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497 | |||
498 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
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499 | cmp [fat_type],16 |
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500 | jne adw_data_cluster |
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501 | mov eax,[ROOT_START] |
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502 | mov edx,[ROOT_SECTORS] |
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503 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
504 | jmp adw_new_sector |
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505 | |||
506 | adw_data_cluster: |
||
507 | sub eax,2 |
||
508 | mov edx,[SECTORS_PER_CLUSTER] |
||
509 | imul eax,edx |
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510 | add eax,[DATA_START] |
||
511 | |||
512 | adw_new_sector: |
||
513 | mov ebx,buffer |
||
514 | call hd_read |
||
74 | mario79 | 515 | cmp [hd_error],0 |
516 | jne adw_not_found |
||
517 | |||
1 | ha | 518 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
519 | |||
520 | adw_analyze: |
||
521 | cmp byte [ebx],0x00 ; is free entry? |
||
522 | je adw_found ; yes |
||
523 | cmp byte [ebx],0xe5 ; is deleted entry? |
||
524 | je adw_found ; yes |
||
525 | add ebx,32 ; position of next dir entry |
||
526 | dec ecx |
||
527 | jnz adw_analyze |
||
528 | |||
529 | inc eax ; next sector |
||
530 | dec edx |
||
531 | jne adw_new_sector |
||
532 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
533 | je adw_not_found |
||
534 | |||
535 | mov eax,[cluster_tmp] |
||
536 | call get_FAT ; get next cluster |
||
74 | mario79 | 537 | cmp [hd_error],0 |
538 | jne adw_not_found |
||
539 | |||
1 | ha | 540 | cmp eax,2 ; incorrect fat chain? |
541 | jb adw_not_found ; yes |
||
542 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
543 | jb adw_new_cluster ; no. analyse it |
||
544 | |||
545 | mov eax,2 ; this block of code add a new cluster |
||
546 | call get_free_FAT ; for the directory because the directory |
||
547 | jc adw_not_found ; is full |
||
548 | |||
549 | mov edx,[fatEND] ; new end for directory |
||
550 | call set_FAT |
||
74 | mario79 | 551 | cmp [hd_error],0 |
552 | jne adw_not_found |
||
1 | ha | 553 | |
554 | push eax ; save new cluster |
||
555 | mov edx,eax |
||
556 | mov eax,[cluster_tmp] ; change last cluster to point new cluster |
||
557 | mov [f_del],1 |
||
558 | call set_FAT |
||
74 | mario79 | 559 | cmp [hd_error],0 |
560 | jne adw_not_found_1 |
||
561 | |||
1 | ha | 562 | mov [f_del],0 |
563 | |||
564 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
565 | call add_disk_free_space |
||
74 | mario79 | 566 | cmp [hd_error],0 |
567 | jne adw_not_found_1 |
||
1 | ha | 568 | |
569 | mov ecx,512/4 |
||
570 | xor eax,eax |
||
571 | mov edi,buffer |
||
572 | cld |
||
573 | rep stosd ; clear new directory cluster |
||
574 | pop eax |
||
575 | |||
576 | sub eax,2 |
||
577 | mov ecx,[SECTORS_PER_CLUSTER] |
||
578 | imul eax,ecx |
||
579 | add eax,[DATA_START] |
||
580 | mov ebx,buffer |
||
581 | push eax ; save sector number |
||
582 | |||
583 | adw_set_empty_directory: |
||
584 | call hd_write |
||
74 | mario79 | 585 | cmp [hd_error],0 |
586 | jne adw_not_found_1 |
||
587 | |||
1 | ha | 588 | inc eax ; next sector |
589 | dec ecx |
||
590 | jnz adw_set_empty_directory |
||
591 | |||
592 | pop eax |
||
593 | |||
594 | adw_found: |
||
595 | pop edi edx ecx |
||
596 | clc ; free space found |
||
597 | ret |
||
74 | mario79 | 598 | adw_not_found_1: |
599 | add esp,4 |
||
1 | ha | 600 | adw_not_found: |
601 | pop edi edx ecx |
||
602 | stc ; free space not found |
||
603 | ret |
||
604 | |||
605 | |||
606 | get_data_cluster: |
||
607 | ;----------------------------------------------------------- |
||
608 | ; input : EAX = cluster |
||
609 | ; EBX = pointer to buffer |
||
610 | ; EDX = # blocks to read in buffer |
||
611 | ; ESI = # blocks to skip over |
||
612 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
613 | ; if CARRY=1 cluster out of range |
||
614 | ; Note : if cluster=0 it's changed to read rootdir |
||
615 | ;----------------------------------------------------------- |
||
616 | push eax ecx |
||
617 | |||
618 | mov [fat16_root],0 |
||
619 | cmp eax,[LAST_CLUSTER] |
||
620 | ja gdc_error ; too big cluster number, something is wrong |
||
621 | cmp eax,2 |
||
622 | jnb gdc_cluster |
||
623 | |||
624 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
625 | cmp [fat_type],16 |
||
626 | jne gdc_cluster |
||
627 | mov eax,[ROOT_START] |
||
628 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
629 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
630 | jmp gdc_read |
||
631 | |||
632 | gdc_cluster: |
||
633 | sub eax,2 |
||
634 | mov ecx,[SECTORS_PER_CLUSTER] |
||
635 | imul eax,ecx |
||
636 | add eax,[DATA_START] |
||
637 | |||
638 | gdc_read: |
||
639 | test esi,esi ; first wanted block |
||
640 | je gdcl1 ; yes, skip count is 0 |
||
641 | dec esi |
||
642 | jmp gdcl2 |
||
643 | |||
644 | gdcl1: |
||
645 | call hd_read |
||
74 | mario79 | 646 | cmp [hd_error],0 |
647 | jne gdc_error |
||
648 | |||
1 | ha | 649 | add ebx,512 ; update pointer |
650 | dec edx |
||
651 | |||
652 | gdcl2: |
||
653 | test edx,edx ; is all read? |
||
654 | je out_of_read |
||
655 | |||
656 | inc eax ; next sector |
||
657 | dec ecx |
||
658 | jnz gdc_read |
||
659 | |||
660 | out_of_read: |
||
661 | pop ecx eax |
||
662 | clc |
||
663 | ret |
||
664 | |||
665 | gdc_error: |
||
666 | pop ecx eax |
||
667 | stc |
||
668 | ret |
||
669 | |||
670 | |||
671 | set_data_cluster: |
||
672 | ;----------------------------------------------------------- |
||
673 | ; input : EAX = cluster |
||
674 | ; EBX = pointer to buffer |
||
675 | ; output : if CARRY=0 ok |
||
676 | ; if CARRY=1 cluster out of range |
||
677 | ;----------------------------------------------------------- |
||
678 | push eax ebx edx |
||
679 | |||
680 | cmp eax,[LAST_CLUSTER] |
||
681 | ja sdc_error ; too big cluster number, something is wrong |
||
682 | sub eax,2 |
||
683 | jb sdc_error ; don't allow rootdir write |
||
684 | |||
685 | mov edx,[SECTORS_PER_CLUSTER] |
||
686 | imul eax,edx |
||
687 | add eax,[DATA_START] |
||
688 | |||
689 | sdc_write: |
||
690 | call hd_write |
||
74 | mario79 | 691 | cmp [hd_error],0 |
692 | jne sdc_error |
||
693 | |||
1 | ha | 694 | add ebx,512 ; update pointer |
695 | inc eax |
||
696 | dec edx |
||
697 | jnz sdc_write |
||
698 | pop edx ebx eax |
||
699 | clc |
||
700 | ret |
||
701 | |||
702 | sdc_error: |
||
703 | pop edx ebx eax |
||
704 | stc |
||
705 | ret |
||
706 | |||
707 | |||
708 | get_cluster_of_a_path: |
||
709 | ;--------------------------------------------------------- |
||
710 | ; input : EBX = pointer to a path string |
||
711 | ; (example: the path "/files/data/document" become |
||
712 | ; "files......data.......document...0" |
||
713 | ; '.' = space char |
||
714 | ; '0' = char(0) (ASCII=0) !!! ) |
||
715 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
716 | ; if (CARRY=0) -> EAX=cluster |
||
717 | ;--------------------------------------------------------- |
||
718 | push ebx edx |
||
719 | |||
720 | mov eax,[ROOT_CLUSTER] |
||
721 | mov edx,ebx |
||
722 | |||
723 | search_end_of_path: |
||
724 | cmp byte [edx],0 |
||
725 | je found_end_of_path |
||
726 | |||
727 | inc edx ; '/' |
||
728 | mov ebx,edx |
||
729 | call analyze_directory |
||
730 | jc directory_not_found |
||
731 | |||
732 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
733 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
734 | and eax,[fatMASK] |
||
735 | add edx,11 ; 8+3 (name+extension) |
||
736 | jmp search_end_of_path |
||
737 | |||
738 | found_end_of_path: |
||
739 | pop edx ebx |
||
740 | clc ; no errors |
||
741 | ret |
||
742 | |||
743 | directory_not_found: |
||
744 | pop edx ebx |
||
745 | stc ; errors occour |
||
746 | ret |
||
747 | |||
748 | |||
749 | bcd2bin: |
||
750 | ;---------------------------------- |
||
751 | ; input : AL=BCD number (eg. 0x11) |
||
752 | ; output : AH=0 |
||
753 | ; AL=decimal number (eg. 11) |
||
754 | ;---------------------------------- |
||
755 | xor ah,ah |
||
756 | shl ax,4 |
||
757 | shr al,4 |
||
758 | aad |
||
759 | ret |
||
760 | |||
761 | |||
762 | get_date_for_file: |
||
763 | ;----------------------------------------------------- |
||
764 | ; Get date from CMOS and pack day,month,year in AX |
||
765 | ; DATE bits 0..4 : day of month 0..31 |
||
766 | ; 5..8 : month of year 1..12 |
||
767 | ; 9..15 : count of years from 1980 |
||
768 | ;----------------------------------------------------- |
||
769 | mov al,0x7 ;day |
||
770 | out 0x70,al |
||
771 | in al,0x71 |
||
772 | call bcd2bin |
||
773 | ror eax,5 |
||
774 | |||
775 | mov al,0x8 ;month |
||
776 | out 0x70,al |
||
777 | in al,0x71 |
||
778 | call bcd2bin |
||
779 | ror eax,4 |
||
780 | |||
781 | mov al,0x9 ;year |
||
782 | out 0x70,al |
||
783 | in al,0x71 |
||
784 | call bcd2bin |
||
785 | add ax,20 ;because CMOS return only the two last |
||
786 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
787 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
788 | ret |
||
789 | |||
790 | |||
791 | get_time_for_file: |
||
792 | ;----------------------------------------------------- |
||
793 | ; Get time from CMOS and pack hour,minute,second in AX |
||
794 | ; TIME bits 0..4 : second (the low bit is lost) |
||
795 | ; 5..10 : minute 0..59 |
||
796 | ; 11..15 : hour 0..23 |
||
797 | ;----------------------------------------------------- |
||
798 | mov al,0x0 ;second |
||
799 | out 0x70,al |
||
800 | in al,0x71 |
||
801 | call bcd2bin |
||
802 | ror eax,6 |
||
803 | |||
804 | mov al,0x2 ;minute |
||
805 | out 0x70,al |
||
806 | in al,0x71 |
||
807 | call bcd2bin |
||
808 | ror eax,6 |
||
809 | |||
810 | mov al,0x4 ;hour |
||
811 | out 0x70,al |
||
812 | in al,0x71 |
||
813 | call bcd2bin |
||
814 | rol eax,11 |
||
815 | ret |
||
816 | |||
817 | |||
818 | set_current_time_for_entry: |
||
819 | ;----------------------------------------------------- |
||
820 | ; Set current time/date for file entry |
||
821 | ; input : ebx = file entry pointer |
||
822 | ;----------------------------------------------------- |
||
823 | push eax |
||
824 | call get_time_for_file ; update files date/time |
||
825 | mov [ebx+22],ax |
||
826 | call get_date_for_file |
||
827 | mov [ebx+24],ax |
||
828 | pop eax |
||
829 | ret |
||
830 | |||
831 | |||
832 | makedir: |
||
833 | ;----------------------------------------------------- |
||
834 | ; input : eax = directory name |
||
835 | ; edx = path |
||
836 | ; output : eax = 0 - ok |
||
837 | ; 3 - unknown FS |
||
838 | ; 5 - file not found |
||
839 | ; 8 - disk full |
||
840 | ; 10 - access denied |
||
841 | ; Note : can only make one directory at time |
||
842 | ;----------------------------------------------------- |
||
843 | cmp [fat_type],0 |
||
844 | jnz make_dir_fat_ok |
||
845 | mov eax,ERROR_UNKNOWN_FS |
||
846 | ret |
||
847 | |||
848 | make_dir_fat_ok: |
||
849 | ; call reserve_hd1 |
||
850 | |||
851 | pushad |
||
852 | |||
853 | mov ebx,edx |
||
854 | call get_cluster_of_a_path |
||
855 | jnc make_dir_found_path |
||
74 | mario79 | 856 | cmp [hd_error],0 |
857 | jne make_dir_error_1 |
||
1 | ha | 858 | |
859 | make_dir_path_not_found: |
||
860 | popad |
||
861 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 862 | cmp [hd_error],0 |
863 | jne make_dir_error_2 |
||
864 | |||
1 | ha | 865 | mov [hd1_status],0 |
866 | mov eax,ERROR_FILE_NOT_FOUND |
||
867 | ret |
||
868 | |||
869 | make_dir_disk_full: |
||
74 | mario79 | 870 | cmp [hd_error],0 |
871 | jne make_dir_error_1 |
||
1 | ha | 872 | popad |
873 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 874 | cmp [hd_error],0 |
875 | jne make_dir_error_2 |
||
876 | |||
1 | ha | 877 | mov [hd1_status],0 |
878 | mov eax,ERROR_DISK_FULL |
||
879 | ret |
||
880 | |||
881 | make_dir_already_exist: |
||
74 | mario79 | 882 | cmp [hd_error],0 |
883 | jne make_dir_error_1 |
||
1 | ha | 884 | mov eax,[cluster] ; directory cluster |
885 | xor edx,edx ; free |
||
886 | mov [f_del],1 |
||
887 | call set_FAT |
||
74 | mario79 | 888 | cmp [hd_error],0 |
889 | jne make_dir_error_1 |
||
890 | |||
1 | ha | 891 | mov [f_del],0 |
892 | |||
893 | popad |
||
894 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 895 | make_dir_error_2: |
1 | ha | 896 | mov [hd1_status],0 |
897 | mov eax,ERROR_ACCESS_DENIED |
||
898 | ret |
||
899 | |||
74 | mario79 | 900 | make_dir_error_1: |
901 | popad |
||
902 | jmp make_dir_error_2 |
||
903 | |||
904 | make_dir_error_3: |
||
905 | add esp,4 |
||
906 | jmp make_dir_error_1 |
||
907 | |||
1 | ha | 908 | make_dir_found_path: |
909 | cmp eax,[ROOT_CLUSTER] |
||
910 | jnz make_dir_not_root |
||
911 | xor eax,eax |
||
912 | |||
913 | make_dir_not_root: |
||
914 | mov ecx,eax ; directorys start cluster |
||
915 | mov word [NewDirEntry2+26],cx ; 16 bits low of cluster |
||
916 | shr ecx,16 |
||
917 | mov word [NewDirEntry2+20],cx ; 16 bits high of cluster (=0 fat16) |
||
918 | |||
919 | push eax ; save parent directory cluster |
||
920 | mov eax,2 |
||
921 | call get_free_FAT |
||
922 | mov [cluster],eax ; first free cluster |
||
923 | pop eax |
||
924 | jc make_dir_disk_full |
||
925 | |||
926 | push eax |
||
927 | mov eax,[cluster] ; directory cluster |
||
928 | mov edx,[fatEND] ; end for directory |
||
929 | call set_FAT |
||
74 | mario79 | 930 | cmp [hd_error],0 |
931 | jne make_dir_error_3 |
||
1 | ha | 932 | pop eax |
933 | |||
934 | mov ebx,PUSHAD_EAX ; dir name |
||
935 | push eax |
||
936 | call analyze_directory ; check if directory already exist |
||
74 | mario79 | 937 | cmp [hd_error],0 |
938 | jne make_dir_error_1 |
||
939 | |||
1 | ha | 940 | pop eax |
941 | jnc make_dir_already_exist ; need to free allocated cluster! |
||
942 | |||
943 | call analyze_directory_to_write |
||
944 | jc make_dir_already_exist ; need to free allocated cluster! |
||
945 | |||
946 | mov esi,PUSHAD_EAX ; dir name |
||
947 | mov edi,ebx ; pointer in buffer |
||
948 | mov ecx,11 |
||
949 | cld |
||
950 | rep movsb |
||
951 | |||
952 | mov dword [ebx+28],0 ; dir size is always 0 |
||
953 | mov ecx,[cluster] |
||
954 | mov [ebx+26],cx ; 16 bits low of cluster |
||
955 | mov word [NewDirEntry1+26],cx |
||
956 | shr ecx,16 |
||
957 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
958 | mov word [NewDirEntry1+20],cx |
||
959 | mov byte [ebx+11],0x10 ; attribute = directory |
||
960 | |||
961 | call set_current_time_for_entry |
||
962 | mov ecx,[ebx+22] |
||
963 | mov dword [NewDirEntry1+22],ecx |
||
964 | mov dword [NewDirEntry2+22],ecx |
||
965 | |||
966 | mov ebx,buffer ; save the directory name,length,cluster |
||
967 | call hd_write |
||
74 | mario79 | 968 | cmp [hd_error],0 |
969 | jne make_dir_error_1 |
||
1 | ha | 970 | |
971 | mov ecx,512/4 |
||
972 | xor eax,eax |
||
973 | mov edi,buffer |
||
974 | cld |
||
975 | rep stosd ; clear new directory cluster |
||
976 | |||
977 | mov eax,[cluster] ; new directory cluster |
||
978 | sub eax,2 |
||
979 | mov edx,[SECTORS_PER_CLUSTER] |
||
980 | imul eax,edx |
||
981 | add eax,[DATA_START] |
||
982 | mov ebx,buffer |
||
983 | add eax,edx ; start from last sector |
||
984 | |||
985 | dir_set_empty_directory: |
||
986 | dec eax ; next sector |
||
987 | cmp edx,1 ; is first directory sector? |
||
988 | jnz not_first_sector ; no. write empty sector |
||
989 | mov esi,NewDirEntry1 |
||
990 | mov edi,buffer |
||
991 | mov ecx,64/4 |
||
992 | cld |
||
993 | rep movsd ; copy 2 first directory entrys "." and ".." |
||
994 | |||
995 | not_first_sector: |
||
996 | call hd_write |
||
74 | mario79 | 997 | cmp [hd_error],0 |
998 | jne make_dir_error_1 |
||
999 | |||
1 | ha | 1000 | dec edx |
1001 | jnz dir_set_empty_directory |
||
1002 | |||
1003 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
1004 | call add_disk_free_space |
||
74 | mario79 | 1005 | cmp [hd_error],0 |
1006 | jne make_dir_error_1 |
||
1 | ha | 1007 | |
1008 | popad |
||
1009 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1010 | cmp [hd_error],0 |
1011 | jne make_dir_error_2 |
||
1 | ha | 1012 | mov [hd1_status],0 |
1013 | xor eax,eax |
||
1014 | ret |
||
1015 | |||
1016 | |||
1017 | removedir: |
||
1018 | ;----------------------------------------------------- |
||
1019 | ; input : eax = file/directory name |
||
1020 | ; edx = path |
||
1021 | ; output : eax = 0 - ok |
||
1022 | ; 3 - unknown FS |
||
1023 | ; 5 - file not found |
||
1024 | ; 10 - access denied |
||
1025 | ;----------------------------------------------------- |
||
1026 | cmp [fat_type],0 |
||
1027 | jnz remove_dir_fat_ok |
||
1028 | mov eax,ERROR_UNKNOWN_FS |
||
1029 | ret |
||
1030 | |||
1031 | remove_dir_fat_ok: |
||
1032 | ; call reserve_hd1 |
||
1033 | |||
1034 | push edi |
||
1035 | mov edi,1 ; allow directory remove |
||
1036 | call file_delete |
||
74 | mario79 | 1037 | cmp [hd_error],0 |
1038 | jne @f |
||
1039 | |||
1 | ha | 1040 | pop edi |
1041 | |||
1042 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1043 | @@: |
1 | ha | 1044 | mov [hd1_status],0 |
1045 | ret |
||
74 | mario79 | 1046 | |
1 | ha | 1047 | |
1048 | add_disk_free_space: |
||
1049 | ;----------------------------------------------------- |
||
1050 | ; input : ecx = cluster count |
||
1051 | ; Note : negative = remove clusters from free space |
||
1052 | ; positive = add clusters to free space |
||
1053 | ;----------------------------------------------------- |
||
1054 | test ecx,ecx ; no change |
||
1055 | je add_dfs_no |
||
1056 | cmp [fat_type],32 ; free disk space only used by fat32 |
||
1057 | jne add_dfs_no |
||
1058 | |||
1059 | push eax ebx |
||
1060 | mov eax,[ADR_FSINFO] |
||
1061 | mov ebx,buffer |
||
1062 | call hd_read |
||
74 | mario79 | 1063 | cmp [hd_error],0 |
1064 | jne add_not_fs |
||
1065 | |||
1 | ha | 1066 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
1067 | jne add_not_fs |
||
1068 | |||
1069 | add [ebx+0x1e8],ecx |
||
1070 | call hd_write |
||
74 | mario79 | 1071 | cmp [hd_error],0 |
1072 | jne add_not_fs |
||
1 | ha | 1073 | |
1074 | add_not_fs: |
||
1075 | pop ebx eax |
||
1076 | |||
1077 | add_dfs_no: |
||
1078 | ret |
||
1079 | |||
1080 | |||
1081 | file_append: |
||
1082 | ;----------------------------------------------------- |
||
1083 | ; input : eax = file name |
||
1084 | ; edx = path |
||
1085 | ; ecx = pointer to buffer |
||
1086 | ; ebx = bytes to write (0 = truncate file) |
||
1087 | ; esi = start position (-1 = end of file) |
||
1088 | ; output : eax = 0 - ok |
||
1089 | ; 3 - unknown FS |
||
1090 | ; 5 - file not found |
||
1091 | ; 6 - end of file |
||
1092 | ; 8 - disk full |
||
1093 | ; 9 - fat table corrupted |
||
1094 | ; 10 - access denied |
||
1095 | ; ebx = bytes written |
||
1096 | ;----------------------------------------------------- |
||
1097 | cmp [fat_type],0 |
||
1098 | jnz append_fat_ok |
||
1099 | mov eax,ERROR_UNKNOWN_FS |
||
1100 | ret |
||
1101 | |||
1102 | append_fat_ok: |
||
1103 | ; call reserve_hd1 |
||
1104 | |||
1105 | pushad |
||
1106 | |||
1107 | mov ebx,edx |
||
1108 | call get_cluster_of_a_path |
||
1109 | jc append_not_found |
||
1110 | |||
1111 | mov ebx,PUSHAD_EAX ; file name |
||
1112 | call analyze_directory |
||
1113 | jc append_not_found |
||
1114 | |||
1115 | mov [sector_tmp],eax |
||
1116 | mov [entry_pos],ebx |
||
1117 | |||
1118 | test byte [ebx+11],0x10 ; is it directory? |
||
1119 | jnz append_access ; yes |
||
1120 | |||
1121 | mov ecx,[ebx+28] ; file size |
||
1122 | mov edi,PUSHAD_ESI ; write position |
||
1123 | cmp edi,-1 ; -1 = eof |
||
1124 | jnz append_inside_file |
||
1125 | mov edi,ecx ; file size |
||
1126 | |||
1127 | append_inside_file: |
||
1128 | cmp edi,ecx ; start above old file size? |
||
1129 | ja append_eof ; yes |
||
1130 | |||
1131 | mov [old_filesize],ecx |
||
1132 | mov [new_filepos],edi |
||
1133 | |||
1134 | mov ecx,PUSHAD_EBX ; bytes to write |
||
1135 | test ecx,ecx ; truncate? |
||
1136 | jz append_truncate ; yes |
||
1137 | |||
1138 | mov [bytes2write],ecx ; bytes to write |
||
1139 | mov esi,PUSHAD_ECX ; pointer to buffer |
||
1140 | mov eax,[ebx+20-2] ; FAT entry |
||
1141 | mov ax,[ebx+26] |
||
1142 | and eax,[fatMASK] |
||
1143 | jnz append_find_pos ; first cluster <> 0 |
||
1144 | |||
1145 | mov eax,2 |
||
1146 | call get_free_FAT |
||
1147 | jc append_disk_full |
||
1148 | mov ecx,eax ; set files first cluster |
||
1149 | mov [ebx+26],cx ; 16 bits low of cluster |
||
1150 | shr ecx,16 |
||
1151 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
1152 | mov edx,[fatEND] ; new end for cluster chain |
||
1153 | call set_FAT |
||
74 | mario79 | 1154 | cmp [hd_error],0 |
1155 | jne append_access |
||
1 | ha | 1156 | |
1157 | push eax ; save first cluster |
||
1158 | mov eax,[sector_tmp] |
||
1159 | mov ebx,buffer |
||
1160 | call hd_write ; write new file entry back to disk |
||
74 | mario79 | 1161 | cmp [hd_error],0 |
1162 | jne append_access_1 |
||
1163 | |||
1 | ha | 1164 | pop eax |
1165 | |||
1166 | append_remove_free: |
||
1167 | mov ecx,-1 ; remove 1 cluster from free disk space |
||
1168 | call add_disk_free_space ; Note: uses buffer |
||
74 | mario79 | 1169 | cmp [hd_error],0 |
1170 | jne append_access |
||
1 | ha | 1171 | |
1172 | append_found_cluster: |
||
1173 | mov [cluster],eax |
||
1174 | sub eax,2 |
||
1175 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1176 | imul eax,ecx |
||
1177 | add eax,[DATA_START] |
||
1178 | xor edi,edi |
||
1179 | |||
1180 | append_new_sector: |
||
74 | mario79 | 1181 | cmp [hd_error],0 |
1182 | jne append_access |
||
1 | ha | 1183 | push ecx |
1184 | mov ecx,[bytes2write] ; bytes left in buffer |
||
1185 | mov ebx,512 |
||
1186 | sub ebx,edi ; bytes left in sector |
||
1187 | cmp ecx,ebx |
||
1188 | jb append_bytes_ok |
||
1189 | mov ecx,ebx |
||
1190 | |||
1191 | append_bytes_ok: |
||
1192 | cmp ecx,512 ; overwrite full sector? |
||
1193 | jz append_full_sector ; yes |
||
1194 | mov ebx,buffer ; overwrite part of sector |
||
1195 | call hd_read ; read old sector |
||
74 | mario79 | 1196 | cmp [hd_error],0 |
1197 | jne append_access_1 |
||
1 | ha | 1198 | |
1199 | append_full_sector: |
||
1200 | sub [bytes2write],ecx |
||
1201 | add [new_filepos],ecx |
||
1202 | add edi,buffer |
||
1203 | cld |
||
1204 | rep movsb |
||
1205 | pop ecx |
||
1206 | |||
1207 | mov ebx,buffer |
||
1208 | call hd_write |
||
74 | mario79 | 1209 | cmp [hd_error],0 |
1210 | jne append_access |
||
1211 | |||
1 | ha | 1212 | cmp [bytes2write],0 ; is all done? |
1213 | jz append_done |
||
1214 | xor edi,edi |
||
1215 | inc eax |
||
1216 | dec ecx |
||
1217 | jnz append_new_sector |
||
1218 | |||
1219 | mov eax,[cluster] |
||
1220 | call get_FAT |
||
74 | mario79 | 1221 | cmp [hd_error],0 |
1222 | jne append_access |
||
1223 | |||
1 | ha | 1224 | cmp eax,2 |
1225 | jb append_fat |
||
1226 | cmp eax,[LAST_CLUSTER] |
||
1227 | jbe append_found_cluster |
||
1228 | |||
1229 | append_alloc_cluster: |
||
1230 | mov eax,2 ; ToDo: use temp array to keep track |
||
1231 | call get_free_FAT ; of last free cluster |
||
1232 | jc append_disk_full |
||
1233 | push eax ; save new cluster |
||
1234 | mov edx,[fatEND] ; new end for cluster chain |
||
1235 | call set_FAT |
||
74 | mario79 | 1236 | cmp [hd_error],0 |
1237 | jne append_access_1 |
||
1238 | |||
1 | ha | 1239 | mov edx,eax |
1240 | mov eax,[cluster] |
||
1241 | mov [f_del],1 |
||
1242 | call set_FAT ; update previous cluster |
||
74 | mario79 | 1243 | cmp [hd_error],0 |
1244 | jne append_access_1 |
||
1245 | |||
1 | ha | 1246 | mov [f_del],0 |
1247 | pop eax |
||
1248 | jmp append_remove_free |
||
1249 | |||
1250 | append_find_pos: |
||
1251 | call find_filepos |
||
1252 | mov [cluster],ebx |
||
1253 | jnc append_new_sector |
||
1254 | test edi,edi |
||
1255 | jz append_alloc_cluster |
||
1256 | |||
1257 | append_fat: |
||
1258 | mov eax,ERROR_FAT_TABLE |
||
1259 | jmp append_ret_code |
||
74 | mario79 | 1260 | |
1 | ha | 1261 | append_disk_full: |
74 | mario79 | 1262 | cmp [hd_error],0 |
1263 | jne append_access |
||
1 | ha | 1264 | mov eax,ERROR_DISK_FULL |
1265 | jmp append_ret_code |
||
1266 | |||
1267 | append_done: |
||
1268 | xor eax,eax |
||
1269 | |||
1270 | append_ret_code: |
||
1271 | mov PUSHAD_EAX,eax ; return code |
||
1272 | |||
1273 | mov eax,[sector_tmp] ; update directory entry |
||
1274 | mov ebx,buffer |
||
1275 | call hd_read |
||
74 | mario79 | 1276 | cmp [hd_error],0 |
1277 | jne append_access |
||
1278 | |||
1 | ha | 1279 | mov ebx,[entry_pos] |
1280 | mov ecx,[new_filepos] |
||
1281 | cmp ecx,[old_filesize] ; is file pos above old size? |
||
1282 | jbe append_size_ok ; no |
||
1283 | mov [ebx+28],ecx ; new file size |
||
1284 | |||
1285 | append_size_ok: |
||
1286 | call set_current_time_for_entry |
||
1287 | mov ebx,buffer |
||
1288 | call hd_write ; write new file entry back to disk |
||
74 | mario79 | 1289 | cmp [hd_error],0 |
1290 | jne append_access |
||
1 | ha | 1291 | |
1292 | sub ecx,PUSHAD_ESI ; start position |
||
1293 | mov PUSHAD_EBX,ecx ; bytes written |
||
1294 | popad |
||
1295 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1296 | cmp [hd_error],0 |
1297 | jne append_access_2 |
||
1298 | |||
1 | ha | 1299 | mov [hd1_status],0 |
1300 | ret |
||
1301 | |||
1302 | append_eof: |
||
1303 | popad |
||
1304 | mov [hd1_status],0 |
||
1305 | xor ebx,ebx |
||
1306 | mov eax,ERROR_END_OF_FILE |
||
1307 | ret |
||
1308 | |||
1309 | append_not_found: |
||
74 | mario79 | 1310 | cmp [hd_error],0 |
1311 | jne append_access |
||
1 | ha | 1312 | popad |
1313 | mov [hd1_status],0 |
||
1314 | xor ebx,ebx |
||
1315 | mov eax,ERROR_FILE_NOT_FOUND |
||
74 | mario79 | 1316 | ret |
1317 | append_access_1: |
||
1318 | add esp,4 |
||
1 | ha | 1319 | append_access: |
1320 | popad |
||
74 | mario79 | 1321 | append_access_2: |
1 | ha | 1322 | mov [hd1_status],0 |
1323 | xor ebx,ebx |
||
1324 | mov eax,ERROR_ACCESS_DENIED |
||
1325 | ret |
||
1326 | |||
1327 | append_truncate: |
||
1328 | mov edx,[ebx+20-2] ; FAT entry |
||
1329 | mov dx,[ebx+26] |
||
1330 | and edx,[fatMASK] |
||
1331 | mov [ebx+28],edi ; set new file size |
||
1332 | test edi,edi ; 0 length file? |
||
1333 | jnz truncate_save_size ; no |
||
1334 | mov [ebx+20],di ; FAT entry = 0 |
||
1335 | mov [ebx+26],di |
||
1336 | |||
1337 | truncate_save_size: |
||
1338 | call set_current_time_for_entry |
||
1339 | mov ebx,buffer |
||
1340 | call hd_write |
||
74 | mario79 | 1341 | cmp [hd_error],0 |
1342 | jne append_access |
||
1343 | |||
1 | ha | 1344 | mov eax,edx ; first cluster |
1345 | test edi,edi ; 0 length file? |
||
1346 | jz truncate_clear_chain |
||
1347 | |||
1348 | imul esi,[SECTORS_PER_CLUSTER],512 ; esi = cluster size in bytes |
||
1349 | |||
1350 | truncate_new_cluster: |
||
1351 | cmp eax,2 ; incorrect fat chain? |
||
1352 | jb truncate_eof ; yes |
||
1353 | cmp eax,[fatRESERVED] ; is it end of file? |
||
1354 | jnb truncate_eof ; yes |
||
1355 | sub edi,esi |
||
1356 | jbe truncate_pos_found |
||
1357 | call get_FAT ; get next cluster |
||
74 | mario79 | 1358 | cmp [hd_error],0 |
1359 | jne append_access |
||
1360 | |||
1 | ha | 1361 | jmp truncate_new_cluster |
1362 | |||
1363 | truncate_pos_found: |
||
1364 | mov edx,[fatEND] ; new end for cluster chain |
||
1365 | mov [f_del],1 |
||
1366 | call set_FAT |
||
74 | mario79 | 1367 | cmp [hd_error],0 |
1368 | jne append_access |
||
1369 | |||
1 | ha | 1370 | mov [f_del],0 |
1371 | mov eax,edx ; clear rest of chain |
||
1372 | |||
1373 | truncate_clear_chain: |
||
1374 | call clear_cluster_chain |
||
74 | mario79 | 1375 | cmp [hd_error],0 |
1376 | jne append_access |
||
1 | ha | 1377 | |
1378 | truncate_eof: |
||
1379 | popad |
||
1380 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1381 | cmp [hd_error],0 |
1382 | jne append_access_2 |
||
1383 | |||
1 | ha | 1384 | mov [hd1_status],0 |
1385 | xor ebx,ebx |
||
1386 | xor eax,eax |
||
1387 | ret |
||
1388 | |||
1389 | |||
1390 | find_filepos: |
||
1391 | ;----------------------------------------------------- |
||
1392 | ; input : eax = first cluster |
||
1393 | ; edi = bytes to skip over (start position) |
||
1394 | ; output : if CARRY=0 file position found |
||
1395 | ; if CARRY=1 end of file found |
||
1396 | ; eax = current file sector |
||
1397 | ; ebx = last cluster |
||
1398 | ; ecx = sector count in last cluster |
||
1399 | ; edi = bytes to skip over (sector position) |
||
1400 | ;----------------------------------------------------- |
||
1401 | push esi |
||
1402 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1403 | imul esi,ecx,512 ; esi = cluster size in bytes |
||
1404 | mov ebx,eax |
||
1405 | |||
1406 | filepos_new_cluster: |
||
1407 | cmp eax,2 ; incorrect fat chain? |
||
1408 | jb filepos_eof ; yes |
||
1409 | cmp eax,[fatRESERVED] ; is it end of file? |
||
1410 | jnb filepos_eof ; yes |
||
1411 | |||
1412 | mov ebx,eax |
||
1413 | cmp edi,esi ; skip over full cluster? |
||
1414 | jb filepos_cluster_ok ; no |
||
1415 | |||
1416 | sub edi,esi |
||
1417 | call get_FAT ; get next cluster |
||
74 | mario79 | 1418 | cmp [hd_error],0 |
1419 | jne filepos_eof |
||
1420 | |||
1 | ha | 1421 | jmp filepos_new_cluster |
1422 | |||
1423 | filepos_cluster_ok: |
||
1424 | sub eax,2 |
||
1425 | imul eax,ecx |
||
1426 | add eax,[DATA_START] |
||
1427 | |||
1428 | filepos_new_sector: |
||
1429 | cmp edi,512 ; skip over full sector? |
||
1430 | jb filepos_sector_ok ; no |
||
1431 | sub edi,512 |
||
1432 | inc eax |
||
1433 | dec ecx |
||
1434 | jnz filepos_new_sector |
||
1435 | |||
1436 | filepos_eof: |
||
1437 | pop esi |
||
1438 | stc |
||
1439 | ret |
||
1440 | |||
1441 | filepos_sector_ok: |
||
1442 | pop esi |
||
1443 | clc |
||
1444 | ret |
||
1445 | |||
1446 | |||
1447 | file_write: |
||
1448 | ;-------------------------------------------------------------------------- |
||
1449 | ; INPUT : user-reg register-in-this meaning symbol-in-this-routine |
||
1450 | ; |
||
1451 | ; EAX EDI system call to write / |
||
1452 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1453 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1454 | ; ECX EBX (PAR2) file size PAR2 |
||
1455 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1456 | ; |
||
1457 | ; output : eax = 0 - ok |
||
1458 | ; 3 - unknown FS |
||
1459 | ; 5 - file not found |
||
1460 | ; 8 - disk full |
||
1461 | ; 10 - access denied |
||
1462 | ;-------------------------------------------------------------------------- |
||
1463 | cmp [fat_type],0 |
||
1464 | jnz fat_ok_for_writing |
||
1465 | mov eax,ERROR_UNKNOWN_FS |
||
1466 | ret |
||
1467 | |||
1468 | fat_ok_for_writing: |
||
1469 | ; call reserve_hd1 |
||
1470 | |||
1471 | pushad |
||
1472 | |||
1473 | xor edi,edi ; don't allow directory remove |
||
1474 | call file_delete ; try to delete the file first |
||
74 | mario79 | 1475 | cmp [hd_error],0 |
1476 | jne exit_write_access_1 |
||
1477 | |||
1 | ha | 1478 | test eax,eax |
1479 | jz old_deleted ; deleted ok |
||
1480 | cmp eax,ERROR_FILE_NOT_FOUND |
||
1481 | jnz exit_write_access ; it exist but can't delete |
||
1482 | |||
1483 | old_deleted: |
||
1484 | mov ebx,PUSHAD_EDX |
||
1485 | call get_cluster_of_a_path |
||
1486 | jnc found_directory_for_writing |
||
74 | mario79 | 1487 | cmp [hd_error],0 |
1488 | jne exit_write_access |
||
1 | ha | 1489 | |
1490 | exit_writing_with_error: |
||
1491 | popad |
||
1492 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1493 | cmp [hd_error],0 |
1494 | jne exit_write_access_2 |
||
1495 | |||
1 | ha | 1496 | mov [hd1_status],0 |
1497 | mov eax,ERROR_FILE_NOT_FOUND |
||
1498 | ret |
||
1499 | |||
1500 | exit_writing_disk_full_clear: |
||
74 | mario79 | 1501 | cmp [hd_error],0 |
1502 | jne exit_write_access_1 |
||
1 | ha | 1503 | mov eax,[sector_tmp] |
1504 | mov ebx,buffer |
||
1505 | call hd_read ; read directory sector |
||
74 | mario79 | 1506 | cmp [hd_error],0 |
1507 | jne exit_write_access_1 |
||
1508 | |||
1 | ha | 1509 | mov edx,[entry_pos] |
1510 | mov byte [edx],0xe5 ; mark as deleted |
||
1511 | call hd_write |
||
74 | mario79 | 1512 | cmp [hd_error],0 |
1513 | jne exit_write_access_1 |
||
1514 | |||
1 | ha | 1515 | mov eax,[edx+20-2] ; FAT entry |
1516 | mov ax,[edx+26] |
||
1517 | and eax,[fatMASK] |
||
1518 | call clear_cluster_chain |
||
1519 | |||
1520 | exit_writing_disk_full: |
||
74 | mario79 | 1521 | cmp [hd_error],0 |
1522 | jne exit_write_access_1 |
||
1 | ha | 1523 | popad |
1524 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1525 | cmp [hd_error],0 |
1526 | jne exit_write_access_2 |
||
1 | ha | 1527 | mov [hd1_status],0 |
1528 | mov eax,ERROR_DISK_FULL |
||
1529 | ret |
||
1530 | |||
1531 | exit_write_access: |
||
1532 | popad |
||
1533 | call update_disk ; write all of cache and fat to hd |
||
1534 | mov [hd1_status],0 |
||
1535 | mov eax,ERROR_ACCESS_DENIED |
||
1536 | ret |
||
1537 | |||
74 | mario79 | 1538 | exit_write_access_1: |
1539 | popad |
||
1540 | exit_write_access_2: |
||
1541 | mov [hd1_status],0 |
||
1542 | mov eax,ERROR_ACCESS_DENIED |
||
1543 | ret |
||
1544 | |||
1 | ha | 1545 | found_directory_for_writing: |
1546 | call analyze_directory_to_write |
||
1547 | jc exit_writing_disk_full |
||
1548 | |||
1549 | mov [sector_tmp],eax |
||
1550 | mov [entry_pos],ebx |
||
1551 | push eax ; save directory sector |
||
1552 | mov eax,2 |
||
1553 | call get_free_FAT |
||
1554 | mov [cluster],eax ; first free cluster |
||
1555 | pop eax |
||
1556 | jc exit_writing_disk_full |
||
1557 | |||
1558 | mov esi,PUSHAD_EAX ; file name |
||
1559 | mov edi,ebx ; pointer in buffer |
||
1560 | mov ecx,11 |
||
1561 | cld |
||
1562 | rep movsb |
||
1563 | |||
1564 | mov esi,PUSHAD_EBX ; file size (bytes left) |
||
1565 | mov [ebx+28],esi ; file size |
||
1566 | mov ecx,[cluster] |
||
1567 | mov [ebx+26],cx ; 16 bits low of cluster |
||
1568 | shr ecx,16 |
||
1569 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
||
1570 | mov byte [ebx+11],0x20 ; attribute = archive |
||
1571 | |||
1572 | call set_current_time_for_entry |
||
1573 | |||
1574 | mov ebx,buffer ; save the directory name,length,cluster |
||
1575 | call hd_write |
||
74 | mario79 | 1576 | cmp [hd_error],0 |
1577 | jne exit_write_access_1 |
||
1 | ha | 1578 | |
1579 | imul edi,[SECTORS_PER_CLUSTER],512 ; edi = cluster size in bytes |
||
1580 | xor ecx,ecx ; cluster count |
||
1581 | mov ebx,PUSHAD_ECX ; ebx = buffer |
||
1582 | |||
1583 | hd_new_block_write: |
||
1584 | |||
1585 | mov eax,[cluster] ; eax = block |
||
1586 | call set_data_cluster |
||
74 | mario79 | 1587 | cmp [hd_error],0 |
1588 | jne exit_write_access_1 |
||
1 | ha | 1589 | |
1590 | sub esi,edi ; sub wrote bytes |
||
1591 | jbe file_saved_OK ; end if all done |
||
1592 | add ebx,edi ; update buffer position |
||
1593 | |||
1594 | inc eax |
||
1595 | call get_free_FAT ; next free in FAT |
||
1596 | jc exit_writing_disk_full_clear |
||
1597 | |||
1598 | mov edx,eax |
||
1599 | xchg eax,[cluster] ; get old cluster and save new cluster |
||
1600 | call set_FAT ; add it in cluster chain |
||
74 | mario79 | 1601 | cmp [hd_error],0 |
1602 | jne exit_write_access_1 |
||
1603 | |||
1 | ha | 1604 | dec ecx ; update cluster count |
1605 | jmp hd_new_block_write |
||
1606 | |||
1607 | file_saved_OK: |
||
1608 | |||
1609 | mov edx,[fatEND] ; new end for cluster chain |
||
1610 | call set_FAT |
||
74 | mario79 | 1611 | cmp [hd_error],0 |
1612 | jne exit_write_access_1 |
||
1613 | |||
1 | ha | 1614 | dec ecx ; update cluster count |
1615 | |||
1616 | call add_disk_free_space ; remove clusters from free disk space |
||
74 | mario79 | 1617 | cmp [hd_error],0 |
1618 | jne exit_write_access_1 |
||
1 | ha | 1619 | |
1620 | popad |
||
1621 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 1622 | cmp [hd_error],0 |
1623 | jne exit_write_access_2 |
||
1 | ha | 1624 | mov [hd1_status],0 |
1625 | xor eax,eax |
||
1626 | ret |
||
1627 | |||
1628 | |||
1629 | file_read: |
||
1630 | ;-------------------------------------------------------------------------- |
||
1631 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
1632 | ; |
||
1633 | ; EAX EDI system call to write / |
||
1634 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
1635 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
1636 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
1637 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
1638 | ; EDI ESI vt first 512 block to read |
||
1639 | ; EDI if 0 - read root |
||
1640 | ; |
||
1641 | ; output : eax = 0 - ok |
||
1642 | ; 3 - unknown FS |
||
1643 | ; 5 - file not found |
||
1644 | ; 6 - end of file |
||
1645 | ; 9 - fat table corrupted |
||
74 | mario79 | 1646 | ; 10 - access denied |
1 | ha | 1647 | ; ebx = size of file/directory |
1648 | ;-------------------------------------------------------------------------- |
||
1649 | cmp [fat_type],0 |
||
1650 | jnz fat_ok_for_reading |
||
1651 | xor ebx,ebx |
||
1652 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 1653 | mov [hd1_status], ebx |
1 | ha | 1654 | ret |
1655 | |||
1656 | fat_ok_for_reading: |
||
1657 | ; call reserve_hd1 |
||
1658 | |||
1659 | pushad |
||
1660 | |||
1661 | mov ebx,edx |
||
1662 | call get_cluster_of_a_path |
||
1663 | jc file_to_read_not_found |
||
1664 | |||
1665 | test edi,edi ; read rootdir |
||
1666 | jne no_read_root |
||
1667 | |||
1668 | xor eax,eax |
||
1669 | call get_dir_size ; return rootdir size |
||
74 | mario79 | 1670 | cmp [hd_error],0 |
1671 | jne file_access_denied |
||
1672 | |||
1 | ha | 1673 | mov [file_size],eax |
1674 | mov eax,[ROOT_CLUSTER] |
||
1675 | jmp file_read_start |
||
1676 | |||
1677 | no_read_root: |
||
1678 | mov ebx,PUSHAD_EAX ; file name |
||
1679 | call analyze_directory |
||
1680 | jc file_to_read_not_found |
||
1681 | |||
1682 | mov eax,[ebx+28] ; file size |
||
1683 | test byte [ebx+11],0x10 ; is it directory? |
||
1684 | jz read_set_size ; no |
||
1685 | |||
1686 | mov eax,[ebx+20-2] ; FAT entry |
||
1687 | mov ax,[ebx+26] |
||
1688 | and eax,[fatMASK] |
||
1689 | call get_dir_size |
||
74 | mario79 | 1690 | cmp [hd_error],0 |
1691 | jne file_access_denied |
||
1 | ha | 1692 | |
1693 | read_set_size: |
||
1694 | mov [file_size],eax |
||
1695 | |||
1696 | mov eax,[ebx+20-2] ; FAT entry |
||
1697 | mov ax,[ebx+26] |
||
1698 | and eax,[fatMASK] |
||
1699 | |||
1700 | file_read_start: |
||
1701 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
1702 | mov edx,PUSHAD_EBX ; file blocks to read |
||
1703 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
1704 | |||
1705 | file_read_new_cluster: |
||
1706 | call get_data_cluster |
||
1707 | jc file_read_eof ; end of file or cluster out of range |
||
1708 | |||
1709 | test edx,edx ; is all read? |
||
1710 | je file_read_OK ; yes |
||
1711 | |||
1712 | call get_FAT ; get next cluster |
||
74 | mario79 | 1713 | cmp [hd_error],0 |
1714 | jne file_access_denied |
||
1715 | |||
1 | ha | 1716 | cmp eax,[fatRESERVED] ; end of file |
1717 | jnb file_read_eof |
||
1718 | cmp eax,2 ; incorrect fat chain |
||
1719 | jnb file_read_new_cluster |
||
1720 | |||
1721 | popad |
||
1722 | mov [hd1_status],0 |
||
1723 | mov ebx,[file_size] |
||
1724 | mov eax,ERROR_FAT_TABLE |
||
1725 | ret |
||
1726 | |||
1727 | file_read_eof: |
||
74 | mario79 | 1728 | cmp [hd_error],0 |
1729 | jne file_access_denied |
||
1 | ha | 1730 | popad |
1731 | mov [hd1_status],0 |
||
1732 | mov ebx,[file_size] |
||
1733 | mov eax,ERROR_END_OF_FILE |
||
1734 | ret |
||
1735 | |||
1736 | file_read_OK: |
||
1737 | popad |
||
1738 | mov [hd1_status],0 |
||
1739 | mov ebx,[file_size] |
||
1740 | xor eax,eax |
||
1741 | ret |
||
1742 | |||
1743 | file_to_read_not_found: |
||
74 | mario79 | 1744 | cmp [hd_error],0 |
1745 | jne file_access_denied |
||
1 | ha | 1746 | popad |
1747 | mov [hd1_status],0 |
||
1748 | xor ebx,ebx |
||
1749 | mov eax,ERROR_FILE_NOT_FOUND |
||
1750 | ret |
||
1751 | |||
74 | mario79 | 1752 | file_access_denied: |
1753 | popad |
||
1754 | mov [hd1_status],0 |
||
1755 | xor ebx,ebx |
||
1756 | mov eax,ERROR_ACCESS_DENIED |
||
1757 | ret |
||
1 | ha | 1758 | |
1759 | get_dir_size: |
||
1760 | ;----------------------------------------------------- |
||
1761 | ; input : eax = first cluster (0=rootdir) |
||
1762 | ; output : eax = directory size in bytes |
||
1763 | ;----------------------------------------------------- |
||
1764 | push edx |
||
1765 | xor edx,edx ; count of directory clusters |
||
1766 | test eax,eax |
||
1767 | jnz dir_size_next |
||
1768 | |||
1769 | mov eax,[ROOT_SECTORS] |
||
1770 | shl eax,9 ; fat16 rootdir size in bytes |
||
1771 | cmp [fat_type],16 |
||
1772 | je dir_size_ret |
||
1773 | mov eax,[ROOT_CLUSTER] |
||
1774 | |||
1775 | dir_size_next: |
||
1776 | cmp eax,2 ; incorrect fat chain |
||
1777 | jb dir_size_end |
||
1778 | cmp eax,[fatRESERVED] ; end of directory |
||
1779 | ja dir_size_end |
||
1780 | call get_FAT ; get next cluster |
||
74 | mario79 | 1781 | cmp [hd_error],0 |
1782 | jne dir_size_ret |
||
1783 | |||
1 | ha | 1784 | inc edx |
1785 | jmp dir_size_next |
||
1786 | |||
1787 | dir_size_end: |
||
1788 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
1789 | imul eax,edx |
||
1790 | |||
1791 | dir_size_ret: |
||
1792 | pop edx |
||
1793 | ret |
||
1794 | |||
1795 | |||
1796 | file_delete: |
||
1797 | ;----------------------------------------------------- |
||
1798 | ; input : eax = file/directory name |
||
1799 | ; edx = path |
||
1800 | ; edi = 1 - allow directory remove else don't remove directory |
||
1801 | ; output : eax = 0 - ok |
||
1802 | ; 3 - unknown FS |
||
1803 | ; 5 - file not found |
||
1804 | ; 10 - access denied |
||
1805 | ;----------------------------------------------------- |
||
1806 | cmp [fat_type],0 |
||
1807 | jnz file_del_fat_ok |
||
1808 | mov eax,ERROR_UNKNOWN_FS |
||
1809 | ret |
||
1810 | |||
1811 | file_del_fat_ok: |
||
1812 | pushad |
||
1813 | |||
1814 | mov ebx,edx |
||
1815 | call get_cluster_of_a_path |
||
1816 | jc file_to_delete_not_found |
||
1817 | |||
1818 | mov ebx,PUSHAD_EAX ; file/directory name |
||
1819 | call analyze_directory |
||
1820 | jc file_to_delete_not_found |
||
1821 | |||
1822 | test byte [ebx+11],0x10 ; is it directory? |
||
1823 | jz delete_notdir ; no. it's file |
||
1824 | cmp edi,1 ; allow directory remove |
||
1825 | jnz delete_no_access ; no |
||
1826 | |||
1827 | push eax ; save directory sector |
||
1828 | mov eax,[ebx+20-2] ; first cluster of file |
||
1829 | mov ax,[ebx+26] ; 0 length files start cluster = 0 |
||
1830 | and eax,[fatMASK] |
||
1831 | xor ebp,ebp ; counter for directory deepnes |
||
1832 | call clear_directory |
||
1833 | pop eax |
||
1834 | jc delete_no_access |
||
1835 | |||
1836 | push ebx ; save directory pointer in buffer |
||
1837 | mov ebx,buffer |
||
1838 | call hd_read ; read directory sector |
||
74 | mario79 | 1839 | cmp [hd_error],0 |
1840 | jne delete_no_access_1 |
||
1 | ha | 1841 | pop ebx |
1842 | |||
1843 | delete_notdir: |
||
1844 | call delete_entry_name |
||
74 | mario79 | 1845 | cmp [hd_error],0 |
1846 | jne delete_no_access |
||
1847 | |||
1 | ha | 1848 | mov eax,ecx ; first cluster of file |
1849 | call clear_cluster_chain |
||
74 | mario79 | 1850 | cmp [hd_error],0 |
1851 | jne delete_no_access |
||
1852 | |||
1 | ha | 1853 | popad |
1854 | xor eax,eax |
||
1855 | ret |
||
1856 | |||
74 | mario79 | 1857 | delete_no_access_1: |
1858 | add esp,4 |
||
1 | ha | 1859 | delete_no_access: |
1860 | popad |
||
1861 | mov eax,ERROR_ACCESS_DENIED |
||
1862 | ret |
||
1863 | |||
1864 | file_to_delete_not_found: |
||
74 | mario79 | 1865 | cmp [hd_error],0 |
1866 | jne delete_no_access |
||
1 | ha | 1867 | popad |
1868 | mov eax,ERROR_FILE_NOT_FOUND |
||
1869 | ret |
||
1870 | |||
1871 | |||
1872 | clear_cluster_chain: |
||
1873 | ;----------------------------------------------------- |
||
1874 | ; input : eax = first cluster |
||
1875 | ;----------------------------------------------------- |
||
1876 | push eax ecx edx |
||
1877 | xor ecx,ecx ; cluster count |
||
1878 | mov [f_del],1 ; delete on |
||
1879 | |||
1880 | clean_new_chain: |
||
1881 | cmp eax,[LAST_CLUSTER] ; end of file |
||
1882 | ja delete_OK |
||
1883 | cmp eax,2 ; unfinished fat chain or zero length file |
||
1884 | jb delete_OK |
||
1885 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1886 | jz delete_OK |
||
1887 | |||
1888 | xor edx,edx |
||
1889 | call set_FAT ; clear fat entry |
||
74 | mario79 | 1890 | cmp [hd_error],0 |
1891 | jne access_denied_01 |
||
1892 | |||
1 | ha | 1893 | inc ecx ; update cluster count |
1894 | mov eax,edx ; old cluster |
||
1895 | jmp clean_new_chain |
||
1896 | |||
1897 | delete_OK: |
||
1898 | call add_disk_free_space ; add clusters to free disk space |
||
74 | mario79 | 1899 | access_denied_01: |
1 | ha | 1900 | mov [f_del],0 |
1901 | pop edx ecx eax |
||
1902 | ret |
||
1903 | |||
1904 | |||
1905 | clear_directory: |
||
1906 | ;----------------------------------------------------- |
||
1907 | ; input : eax = directory cluster |
||
1908 | ; ebp = directory deepnes |
||
1909 | ; Note : use recursive call |
||
1910 | ;----------------------------------------------------- |
||
1911 | pushad |
||
1912 | inc ebp |
||
1913 | cmp ebp,64 ; if over 63 directory deep |
||
1914 | jnb clear_error ; something must be wrong |
||
1915 | |||
1916 | clear_new_cluster: |
||
1917 | cmp eax,[LAST_CLUSTER] |
||
1918 | ja clear_end |
||
1919 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
1920 | jz clear_end |
||
1921 | mov esi,eax ; esi = current directory cluster |
||
1922 | sub eax,2 |
||
1923 | jb clear_end |
||
1924 | mov ecx,[SECTORS_PER_CLUSTER] |
||
1925 | imul eax,ecx |
||
1926 | add eax,[DATA_START] |
||
1927 | |||
1928 | clear_new_sector: |
||
1929 | mov edi,eax ; edi = current directory sector |
||
1930 | mov ebx,deltree_buffer |
||
1931 | call hd_read |
||
74 | mario79 | 1932 | cmp [hd_error],0 |
1933 | jne clear_error |
||
1934 | |||
1 | ha | 1935 | mov edx,512/32 ; count of dir entrys per sector = 16 |
1936 | |||
1937 | clear_analyze: |
||
1938 | mov al,[ebx+11] ; file attribute |
||
1939 | and al,0xf |
||
1940 | cmp al,0xf |
||
1941 | je clear_long_filename |
||
1942 | |||
1943 | cmp byte [ebx],'.' ; parent or current directory |
||
1944 | je clear_next_entry |
||
1945 | cmp byte [ebx],0xe5 ; deleted |
||
1946 | je clear_next_entry |
||
1947 | cmp byte [ebx],0 ; empty |
||
1948 | je clear_write_last |
||
1949 | ;je clear_next_entry |
||
1950 | |||
1951 | mov eax,[ebx+20-2] ; first cluster of entry |
||
1952 | mov ax,[ebx+26] |
||
1953 | and eax,[fatMASK] |
||
1954 | |||
1955 | test byte [ebx+11],0x10 ; is it directory? |
||
1956 | jz clear_file ; no |
||
1957 | |||
1958 | push eax ebx |
||
1959 | mov eax,edi |
||
1960 | mov ebx,deltree_buffer ; save buffer over recursive call |
||
1961 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1962 | cmp [hd_error],0 |
1963 | jne clear_error |
||
1964 | |||
1 | ha | 1965 | pop ebx eax |
1966 | |||
1967 | call clear_directory ; recursive call !!! |
||
1968 | jc clear_error ; exit if error found |
||
1969 | |||
1970 | push eax ebx |
||
1971 | mov eax,edi |
||
1972 | mov ebx,deltree_buffer |
||
1973 | call hd_read ; read directory sector again |
||
74 | mario79 | 1974 | cmp [hd_error],0 |
1975 | jne clear_error_1 |
||
1976 | |||
1 | ha | 1977 | pop ebx eax |
1978 | |||
1979 | clear_file: |
||
1980 | call clear_cluster_chain |
||
74 | mario79 | 1981 | cmp [hd_error],0 |
1982 | jne clear_error |
||
1 | ha | 1983 | |
1984 | clear_long_filename: |
||
1985 | mov byte [ebx],0xe5 |
||
1986 | |||
1987 | clear_next_entry: |
||
1988 | add ebx,32 ; position of next dir entry |
||
1989 | dec edx |
||
1990 | jnz clear_analyze |
||
1991 | |||
1992 | mov eax,edi |
||
1993 | mov ebx,deltree_buffer |
||
1994 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 1995 | cmp [hd_error],0 |
1996 | jne clear_error |
||
1 | ha | 1997 | |
1998 | inc eax ; next sector |
||
1999 | dec ecx |
||
2000 | jnz clear_new_sector |
||
2001 | |||
2002 | mov eax,esi |
||
2003 | call get_FAT ; get next cluster |
||
74 | mario79 | 2004 | cmp [hd_error],0 |
2005 | jne clear_error |
||
2006 | |||
1 | ha | 2007 | jmp clear_new_cluster ; clear it |
2008 | |||
2009 | clear_write_last: |
||
2010 | mov eax,edi |
||
2011 | mov ebx,deltree_buffer |
||
2012 | call hd_write ; write directory sector to disk |
||
74 | mario79 | 2013 | cmp [hd_error],0 |
2014 | jne clear_error |
||
1 | ha | 2015 | |
2016 | clear_end: |
||
2017 | popad |
||
2018 | clc |
||
2019 | ret |
||
74 | mario79 | 2020 | clear_error_1: |
2021 | add esp,8 |
||
1 | ha | 2022 | clear_error: |
2023 | popad |
||
2024 | stc |
||
2025 | ret |
||
2026 | |||
2027 | |||
2028 | delete_entry_name: |
||
2029 | ;----------------------------------------------------- |
||
2030 | ; input : eax = directory sector |
||
2031 | ; ebx = directory pointer in buffer |
||
2032 | ; longname_sec = 2 previous directory sectors |
||
2033 | ; output : ecx = first cluster |
||
2034 | ; change : eax,ebx,edx |
||
2035 | ;----------------------------------------------------- |
||
2036 | mov byte [ebx],0xe5 |
||
2037 | mov ecx,[ebx+20-2] ; first cluster of file |
||
2038 | mov cx,[ebx+26] ; 0 length files start cluster = 0 |
||
2039 | and ecx,[fatMASK] |
||
2040 | |||
2041 | delete_empty: |
||
2042 | sub ebx,32 |
||
2043 | cmp ebx,buffer |
||
2044 | jnb delete_test_long |
||
2045 | |||
2046 | mov ebx,buffer |
||
2047 | call hd_write ; write directory sector back |
||
74 | mario79 | 2048 | cmp [hd_error],0 |
2049 | jne delete_name_end |
||
2050 | |||
1 | ha | 2051 | xor eax,eax |
2052 | xchg eax,[longname_sec2] |
||
2053 | xchg eax,[longname_sec1] |
||
2054 | test eax,eax ; is there previous directory sector? |
||
2055 | jz delete_name_end ; no |
||
2056 | |||
2057 | mov ebx,buffer |
||
2058 | call hd_read ; read previous sector |
||
74 | mario79 | 2059 | cmp [hd_error],0 |
2060 | jne delete_name_end |
||
2061 | |||
1 | ha | 2062 | mov ebx,buffer+0x1e0 ; start from last entry |
2063 | |||
2064 | delete_test_long: |
||
2065 | mov dh,[ebx+11] ; file attribute |
||
2066 | and dh,0xf |
||
2067 | cmp dh,0xf |
||
2068 | jne delete_write_buffer |
||
2069 | |||
2070 | cmp byte [ebx],0x40 ; end of long dir entry? |
||
2071 | mov byte [ebx],0xe5 |
||
2072 | jb delete_empty |
||
2073 | |||
2074 | delete_write_buffer: |
||
2075 | mov ebx,buffer |
||
2076 | call hd_write ; write directory sector back |
||
2077 | |||
2078 | delete_name_end: |
||
2079 | ret |
||
2080 | |||
2081 | |||
2082 | rename: |
||
2083 | ;----------------------------------------------------------- |
||
2084 | ; input : eax = source directory name |
||
2085 | ; edx = source path |
||
2086 | ; ebx = dest directory name |
||
2087 | ; edi = dest path |
||
2088 | ; output : eax = 0 - ok |
||
2089 | ; 3 - unknown FS |
||
2090 | ; 5 - file not found |
||
2091 | ; 8 - disk full |
||
2092 | ; 10 - access denied |
||
2093 | ;----------------------------------------------------------- |
||
2094 | cmp [fat_type],0 |
||
2095 | jnz fat_ok_for_rename |
||
2096 | mov eax,ERROR_UNKNOWN_FS |
||
2097 | ret |
||
2098 | |||
2099 | fat_ok_for_rename: |
||
2100 | ; call reserve_hd1 |
||
2101 | |||
2102 | pushad |
||
2103 | |||
2104 | mov ebx,edx ; source path |
||
2105 | call get_cluster_of_a_path |
||
2106 | jc rename_entry_not_found |
||
2107 | |||
2108 | mov ebx,PUSHAD_EAX ; source directory name |
||
2109 | call analyze_directory |
||
2110 | jc rename_entry_not_found |
||
2111 | |||
2112 | mov [sector_tmp],eax ; save source sector |
||
2113 | mov [entry_pos],ebx |
||
2114 | mov esi,ebx |
||
2115 | mov edi,dir_entry |
||
2116 | mov ecx,32/4 |
||
2117 | cld |
||
2118 | rep movsd ; save entry |
||
2119 | |||
2120 | mov ebx,PUSHAD_EDI ; dest path |
||
2121 | call get_cluster_of_a_path |
||
2122 | jc rename_entry_not_found |
||
2123 | |||
2124 | mov edx,eax ; save dest directory cluster |
||
2125 | mov ebx,PUSHAD_EBX ; dest directory name |
||
2126 | push [longname_sec1] |
||
2127 | push [longname_sec2] |
||
2128 | call analyze_directory ; check if entry already exist |
||
74 | mario79 | 2129 | cmp [hd_error],0 |
2130 | jne rename_entry_already_exist_1 |
||
2131 | |||
1 | ha | 2132 | pop [longname_sec2] |
2133 | pop [longname_sec1] |
||
2134 | jnc rename_entry_already_exist |
||
2135 | |||
2136 | mov eax,edx |
||
2137 | call analyze_directory_to_write |
||
2138 | jc rename_disk_full |
||
2139 | |||
2140 | mov esi,dir_entry |
||
2141 | mov edi,ebx |
||
2142 | mov ecx,32/4 |
||
2143 | cld |
||
2144 | rep movsd ; copy entry |
||
2145 | mov esi,PUSHAD_EBX ; dest directory name |
||
2146 | mov edi,ebx |
||
2147 | mov ecx,11 |
||
2148 | rep movsb ; copy name |
||
2149 | |||
2150 | mov ebx,buffer ; save the directory name,length,cluster |
||
2151 | call hd_write |
||
2152 | |||
2153 | test byte [dir_entry+11],0x10 ; is it directory? |
||
2154 | jz rename_not_dir ; no |
||
2155 | mov eax,[dir_entry+20-2] ; FAT entry |
||
2156 | mov ax,[dir_entry+26] |
||
2157 | and eax,[fatMASK] |
||
2158 | call change_2dot_cluster |
||
74 | mario79 | 2159 | cmp [hd_error],0 |
2160 | jne rename_entry_already_exist |
||
1 | ha | 2161 | |
2162 | rename_not_dir: |
||
74 | mario79 | 2163 | cmp [hd_error],0 |
2164 | jne rename_entry_already_exist |
||
1 | ha | 2165 | mov eax,[sector_tmp] |
2166 | mov ebx,buffer |
||
2167 | call hd_read ; read source directory sector |
||
74 | mario79 | 2168 | cmp [hd_error],0 |
2169 | jne rename_entry_already_exist |
||
1 | ha | 2170 | |
2171 | mov ebx,[entry_pos] |
||
2172 | call delete_entry_name |
||
74 | mario79 | 2173 | cmp [hd_error],0 |
2174 | jne rename_entry_already_exist |
||
1 | ha | 2175 | |
2176 | popad |
||
2177 | call update_disk ; write all of cache and fat to hd |
||
74 | mario79 | 2178 | cmp [hd_error],0 |
2179 | jne rename_entry_already_exist_2 |
||
1 | ha | 2180 | mov [hd1_status],0 |
2181 | xor eax,eax |
||
2182 | ret |
||
2183 | |||
2184 | rename_entry_not_found: |
||
74 | mario79 | 2185 | cmp [hd_error],0 |
2186 | jne rename_entry_already_exist |
||
1 | ha | 2187 | popad |
2188 | mov [hd1_status],0 |
||
2189 | mov eax,ERROR_FILE_NOT_FOUND |
||
2190 | ret |
||
2191 | |||
74 | mario79 | 2192 | rename_entry_already_exist_1: |
2193 | add esp,8 |
||
1 | ha | 2194 | rename_entry_already_exist: |
2195 | popad |
||
74 | mario79 | 2196 | rename_entry_already_exist_2: |
1 | ha | 2197 | mov [hd1_status],0 |
2198 | mov eax,ERROR_ACCESS_DENIED |
||
2199 | ret |
||
2200 | |||
2201 | rename_disk_full: |
||
74 | mario79 | 2202 | cmp [hd_error],0 |
2203 | jne rename_entry_already_exist |
||
1 | ha | 2204 | popad |
2205 | mov [hd1_status],0 |
||
2206 | mov eax,ERROR_DISK_FULL |
||
2207 | ret |
||
2208 | |||
2209 | |||
2210 | change_2dot_cluster: |
||
2211 | ;----------------------------------------------------------- |
||
2212 | ; input : eax = directory cluster |
||
2213 | ; edx = value to save |
||
2214 | ; change : eax,ebx,edx |
||
2215 | ;----------------------------------------------------------- |
||
2216 | cmp eax,[LAST_CLUSTER] |
||
2217 | ja not_2dot ; too big cluster number, something is wrong |
||
2218 | sub eax,2 |
||
2219 | jb not_2dot |
||
2220 | |||
2221 | imul eax,[SECTORS_PER_CLUSTER] |
||
2222 | add eax,[DATA_START] |
||
2223 | mov ebx,buffer |
||
2224 | call hd_read |
||
74 | mario79 | 2225 | cmp [hd_error],0 |
2226 | jne not_2dot |
||
1 | ha | 2227 | |
2228 | cmp dword [ebx+32],'.. ' |
||
2229 | jnz not_2dot |
||
2230 | |||
2231 | cmp edx,[ROOT_CLUSTER] ; is rootdir cluster? |
||
2232 | jne not_2dot_root |
||
2233 | xor edx,edx ; yes. set it zero |
||
2234 | |||
2235 | not_2dot_root: |
||
2236 | mov [ebx+32+26],dx ; 16 bits low of cluster |
||
2237 | shr edx,16 |
||
2238 | mov [ebx+32+20],dx ; 16 bits high of cluster (=0 fat16) |
||
2239 | call hd_write |
||
2240 | |||
2241 | not_2dot: |
||
2242 | ret |
||
2243 | |||
2244 | |||
2245 | get_hd_info: |
||
2246 | ;----------------------------------------------------------- |
||
2247 | ; output : eax = 0 - ok |
||
2248 | ; 3 - unknown FS |
||
74 | mario79 | 2249 | ; 10 - access denied |
1 | ha | 2250 | ; edx = cluster size in bytes |
2251 | ; ebx = total clusters on disk |
||
2252 | ; ecx = free clusters on disk |
||
2253 | ;----------------------------------------------------------- |
||
2254 | cmp [fat_type],0 |
||
2255 | jnz info_fat_ok |
||
2256 | xor edx,edx |
||
2257 | xor ebx,ebx |
||
2258 | xor ecx,ecx |
||
2259 | mov eax,ERROR_UNKNOWN_FS |
||
2260 | ret |
||
2261 | |||
2262 | info_fat_ok: |
||
2263 | ; call reserve_hd1 |
||
2264 | |||
2265 | xor ecx,ecx ; count of free clusters |
||
2266 | mov eax,2 |
||
2267 | mov ebx,[LAST_CLUSTER] |
||
2268 | |||
2269 | info_cluster: |
||
2270 | push eax |
||
2271 | call get_FAT ; get cluster info |
||
74 | mario79 | 2272 | cmp [hd_error],0 |
2273 | jne info_access_denied |
||
2274 | |||
1 | ha | 2275 | test eax,eax ; is it free? |
2276 | jnz info_used ; no |
||
2277 | inc ecx |
||
2278 | |||
2279 | info_used: |
||
2280 | pop eax |
||
2281 | inc eax |
||
2282 | cmp eax,ebx ; is above last cluster? |
||
2283 | jbe info_cluster ; no. test next cluster |
||
2284 | |||
2285 | dec ebx ; cluster count |
||
2286 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
2287 | mov [hd1_status],0 |
||
2288 | xor eax,eax |
||
2289 | ret |
||
2290 | |||
74 | mario79 | 2291 | info_access_denied: |
2292 | add esp,4 |
||
2293 | xor edx,edx |
||
2294 | xor ebx,ebx |
||
2295 | xor ecx,ecx |
||
2296 | mov eax,ERROR_ACCESS_DENIED |
||
2297 | ret |
||
1 | ha | 2298 | |
2299 | update_disk: |
||
2300 | ;----------------------------------------------------------- |
||
2301 | ; write changed fat and cache to disk |
||
2302 | ;----------------------------------------------------------- |
||
2303 | cmp [fat_change],0 ; is fat changed? |
||
2304 | je upd_no_change |
||
2305 | |||
2306 | call write_fat_sector |
||
74 | mario79 | 2307 | cmp [hd_error],0 |
2308 | jne update_disk_acces_denied |
||
1 | ha | 2309 | |
2310 | upd_no_change: |
||
2311 | |||
2312 | call write_cache |
||
74 | mario79 | 2313 | update_disk_acces_denied: |
1 | ha | 2314 | ret |
2315 | |||
2316 | |||
2317 | ;************************************************************************** |
||
2318 | ; |
||
2319 | ; 0x600008 - first entry in cache list |
||
2320 | ; |
||
2321 | ; +0 - lba sector |
||
2322 | ; +4 - state of cache sector |
||
2323 | ; 0 = empty |
||
2324 | ; 1 = used for read ( same as in hd ) |
||
2325 | ; 2 = used for write ( differs from hd ) |
||
2326 | ; |
||
2327 | ; +65536 - cache entries |
||
2328 | ; |
||
2329 | ;************************************************************************** |
||
2330 | |||
2331 | |||
2332 | hd_read: |
||
2333 | ;----------------------------------------------------------- |
||
2334 | ; input : eax = block to read |
||
2335 | ; ebx = destination |
||
2336 | ;----------------------------------------------------------- |
||
2337 | push ecx esi edi ; scan cache |
||
2338 | |||
2339 | mov ecx,cache_max ; entries in cache |
||
2340 | mov esi,0x600000+8 |
||
2341 | mov edi,1 |
||
2342 | |||
2343 | hdreadcache: |
||
2344 | |||
2345 | cmp dword [esi+4],0 ; empty |
||
2346 | je nohdcache |
||
2347 | |||
2348 | cmp [esi],eax ; correct sector |
||
2349 | je yeshdcache |
||
2350 | |||
2351 | nohdcache: |
||
2352 | |||
2353 | add esi,8 |
||
2354 | inc edi |
||
2355 | dec ecx |
||
2356 | jnz hdreadcache |
||
2357 | |||
2358 | call find_empty_slot ; ret in edi |
||
74 | mario79 | 2359 | cmp [hd_error],0 |
2360 | jne return_01 |
||
1 | ha | 2361 | |
2362 | push eax edx |
||
2363 | |||
74 | mario79 | 2364 | call wait_for_hd_idle |
2365 | cmp [hd_error],0 |
||
2366 | jne hd_read_error |
||
2367 | |||
1 | ha | 2368 | cli |
2369 | xor eax,eax |
||
2370 | mov edx,[hdbase] |
||
2371 | inc edx |
||
86 | diamond | 2372 | out dx,al ; ATAFeatures ॣ¨áâà "®á®¡¥®á⥩" |
1 | ha | 2373 | inc edx |
2374 | inc eax |
||
86 | diamond | 2375 | out dx,al ; ATASectorCount áç¥â稪 ᥪâ®à®¢ |
1 | ha | 2376 | inc edx |
2377 | mov eax,[esp+4] |
||
86 | diamond | 2378 | out dx,al ; ATASectorNumber ॣ¨áâà ®¬¥à ᥪâ®à |
1 | ha | 2379 | shr eax,8 |
2380 | inc edx |
||
86 | diamond | 2381 | out dx,al ; ATACylinder ®¬¥à 樫¨¤à (¬« ¤è¨© ¡ ©â) |
1 | ha | 2382 | shr eax,8 |
2383 | inc edx |
||
86 | diamond | 2384 | out dx,al ; ®¬¥à 樫¨¤à (áâ à訩 ¡ ©â) |
1 | ha | 2385 | shr eax,8 |
2386 | inc edx |
||
2387 | and al,1+2+4+8 |
||
2388 | add al,byte [hdid] |
||
2389 | add al,128+64+32 |
||
86 | diamond | 2390 | out dx,al ; ®¬¥à £®«®¢ª¨/®¬¥à ¤¨áª |
1 | ha | 2391 | inc edx |
2392 | mov al,20h |
||
86 | diamond | 2393 | out dx,al ; ATACommand ॣ¨áâà ª®¬ ¤ |
1 | ha | 2394 | sti |
2395 | |||
2396 | call wait_for_sector_buffer |
||
2397 | |||
2398 | cmp [hd_error],0 |
||
2399 | jne hd_read_error |
||
2400 | |||
2401 | cli |
||
2402 | push edi |
||
2403 | shl edi,9 |
||
2404 | add edi,0x600000+65536 |
||
2405 | mov ecx,256 |
||
2406 | mov edx,[hdbase] |
||
2407 | cld |
||
2408 | rep insw |
||
2409 | pop edi |
||
2410 | sti |
||
2411 | |||
2412 | pop edx eax |
||
2413 | blok_read_2: |
||
2414 | lea esi,[edi*8+0x600000] |
||
2415 | mov [esi],eax ; sector number |
||
2416 | mov dword [esi+4],1 ; hd read - mark as same as in hd |
||
2417 | |||
2418 | yeshdcache: |
||
2419 | |||
2420 | mov esi,edi |
||
2421 | shl esi,9 |
||
2422 | add esi,0x600000+65536 |
||
2423 | mov edi,ebx |
||
2424 | mov ecx,512/4 |
||
2425 | cld |
||
2426 | rep movsd ; move data |
||
74 | mario79 | 2427 | return_01: |
1 | ha | 2428 | pop edi esi ecx |
2429 | ret |
||
2430 | |||
2431 | |||
2432 | hd_write: |
||
2433 | ;----------------------------------------------------------- |
||
2434 | ; input : eax = block |
||
2435 | ; ebx = pointer to memory |
||
2436 | ;----------------------------------------------------------- |
||
2437 | push ecx esi edi |
||
2438 | |||
2439 | ; check if the cache already has the sector and overwrite it |
||
2440 | |||
2441 | mov ecx,cache_max |
||
2442 | mov esi,0x600000+8 |
||
2443 | mov edi,1 |
||
2444 | |||
2445 | hdwritecache: |
||
2446 | |||
2447 | cmp dword [esi+4],0 ; if cache slot is empty |
||
2448 | je not_in_cache_write |
||
2449 | |||
2450 | cmp [esi],eax ; if the slot has the sector |
||
2451 | je yes_in_cache_write |
||
2452 | |||
2453 | not_in_cache_write: |
||
2454 | |||
2455 | add esi,8 |
||
2456 | inc edi |
||
2457 | dec ecx |
||
2458 | jnz hdwritecache |
||
2459 | |||
2460 | ; sector not found in cache |
||
2461 | ; write the block to a new location |
||
2462 | |||
2463 | call find_empty_slot ; ret in edi |
||
74 | mario79 | 2464 | cmp [hd_error],0 |
2465 | jne hd_write_access_denied |
||
1 | ha | 2466 | |
2467 | lea esi,[edi*8+0x600000] |
||
2468 | mov [esi],eax ; sector number |
||
2469 | |||
2470 | yes_in_cache_write: |
||
2471 | |||
2472 | mov dword [esi+4],2 ; write - differs from hd |
||
2473 | |||
2474 | shl edi,9 |
||
2475 | add edi,0x600000+65536 |
||
2476 | mov esi,ebx |
||
2477 | mov ecx,512/4 |
||
2478 | cld |
||
2479 | rep movsd ; move data |
||
74 | mario79 | 2480 | hd_write_access_denied: |
1 | ha | 2481 | pop edi esi ecx |
2482 | ret |
||
2483 | |||
2484 | |||
2485 | write_cache: |
||
2486 | ;----------------------------------------------------------- |
||
2487 | ; write all changed sectors to disk |
||
2488 | ;----------------------------------------------------------- |
||
2489 | push eax ecx edx esi edi |
||
2490 | |||
2491 | ; write difference ( 2 ) from cache to hd |
||
2492 | |||
2493 | mov ecx,cache_max |
||
2494 | mov esi,0x600000+8 |
||
2495 | mov edi,1 |
||
2496 | |||
2497 | write_cache_more: |
||
2498 | |||
2499 | cmp dword [esi+4],2 ; if cache slot is not different |
||
2500 | jne does_not_need_writing |
||
2501 | |||
2502 | mov dword [esi+4],1 ; same as in hd |
||
2503 | mov eax,[esi] ; eax = sector to write |
||
2504 | |||
2505 | cmp eax,[PARTITION_START] |
||
2506 | jb danger |
||
2507 | cmp eax,[PARTITION_END] |
||
2508 | ja danger |
||
2509 | |||
2510 | call wait_for_hd_idle |
||
74 | mario79 | 2511 | cmp [hd_error],0 |
2512 | jne hd_write_error |
||
1 | ha | 2513 | |
2514 | cli |
||
2515 | xor eax,eax |
||
2516 | mov edx,[hdbase] |
||
2517 | inc edx |
||
2518 | out dx,al |
||
2519 | inc edx |
||
2520 | inc eax |
||
2521 | out dx,al |
||
2522 | inc edx |
||
2523 | mov eax,[esi] ; eax = sector to write |
||
2524 | out dx,al |
||
2525 | shr eax,8 |
||
2526 | inc edx |
||
2527 | out dx,al |
||
2528 | shr eax,8 |
||
2529 | inc edx |
||
2530 | out dx,al |
||
2531 | shr eax,8 |
||
2532 | inc edx |
||
2533 | and al,1+2+4+8 |
||
2534 | add al,byte [hdid] |
||
2535 | add al,128+64+32 |
||
2536 | out dx,al |
||
2537 | inc edx |
||
2538 | mov al,30h |
||
2539 | out dx,al |
||
2540 | sti |
||
2541 | |||
2542 | call wait_for_sector_buffer |
||
2543 | |||
2544 | cmp [hd_error],0 |
||
2545 | jne hd_write_error |
||
2546 | |||
2547 | push ecx esi |
||
2548 | |||
2549 | cli |
||
2550 | mov esi,edi |
||
2551 | shl esi,9 |
||
2552 | add esi,0x600000+65536 ; esi = from memory position |
||
2553 | mov ecx,256 |
||
2554 | mov edx,[hdbase] |
||
2555 | cld |
||
2556 | rep outsw |
||
2557 | sti |
||
2558 | |||
2559 | pop esi ecx |
||
2560 | |||
2561 | danger: |
||
2562 | does_not_need_writing: |
||
2563 | |||
2564 | add esi,8 |
||
2565 | inc edi |
||
2566 | dec ecx |
||
2567 | jnz write_cache_more |
||
74 | mario79 | 2568 | return_02: |
1 | ha | 2569 | pop edi esi edx ecx eax |
2570 | ret |
||
2571 | |||
2572 | |||
2573 | find_empty_slot: |
||
2574 | ;----------------------------------------------------------- |
||
2575 | ; find empty or read slot, flush cache if next 10% is used by write |
||
2576 | ; output : edi = cache slot |
||
2577 | ;----------------------------------------------------------- |
||
2578 | push ecx esi |
||
2579 | |||
2580 | search_again: |
||
2581 | |||
2582 | mov ecx,cache_max*10/100 |
||
2583 | mov edi,[cache_search_start] |
||
2584 | |||
2585 | search_for_empty: |
||
2586 | |||
2587 | inc edi |
||
2588 | cmp edi,cache_max |
||
2589 | jbe inside_cache |
||
2590 | mov edi,1 |
||
2591 | |||
2592 | inside_cache: |
||
2593 | |||
2594 | cmp dword [edi*8+0x600000+4],2 ; get cache slot info |
||
2595 | jb found_slot ; it's empty or read |
||
2596 | dec ecx |
||
2597 | jnz search_for_empty |
||
2598 | |||
2599 | call write_cache ; no empty slots found, write all |
||
74 | mario79 | 2600 | cmp [hd_error],0 |
2601 | jne found_slot_access_denied |
||
2602 | |||
1 | ha | 2603 | jmp search_again ; and start again |
2604 | |||
2605 | found_slot: |
||
2606 | |||
2607 | mov [cache_search_start],edi |
||
74 | mario79 | 2608 | found_slot_access_denied: |
1 | ha | 2609 | pop esi ecx |
2610 | ret |
||
2611 | |||
2612 | |||
2613 | save_hd_wait_timeout: |
||
2614 | |||
2615 | push eax |
||
2616 | mov eax,[timer_ticks];[0xfdf0] |
||
2617 | add eax,300 ; 3 sec timeout |
||
2618 | mov [hd_wait_timeout],eax |
||
2619 | pop eax |
||
2620 | ret |
||
2621 | |||
2622 | |||
2623 | check_hd_wait_timeout: |
||
2624 | |||
2625 | push eax |
||
2626 | mov eax,[hd_wait_timeout] |
||
2627 | cmp [timer_ticks], eax ;[0xfdf0],eax |
||
2628 | jg hd_timeout_error |
||
2629 | pop eax |
||
74 | mario79 | 2630 | mov [hd_error],0 |
1 | ha | 2631 | ret |
2632 | |||
2633 | iglobal |
||
2634 | hd_timeout_str db 'K : FS - HD timeout',13,10,0 |
||
2635 | hd_read_str db 'K : FS - HD read error',13,10,0 |
||
2636 | hd_write_str db 'K : FS - HD write error',13,10,0 |
||
74 | mario79 | 2637 | hd_lba_str db 'K : FS - HD LBA error',13,10,0 |
1 | ha | 2638 | endg |
2639 | |||
2640 | hd_timeout_error: |
||
2641 | |||
2642 | call clear_hd_cache |
||
2643 | call clear_application_table_status |
||
2644 | mov esi,hd_timeout_str |
||
2645 | call sys_msg_board_str |
||
74 | mario79 | 2646 | ; jmp $ |
2647 | mov [hd_error],1 |
||
2648 | pop eax |
||
2649 | ret |
||
1 | ha | 2650 | |
2651 | hd_read_error: |
||
2652 | |||
2653 | call clear_hd_cache |
||
2654 | call clear_application_table_status |
||
2655 | mov esi,hd_read_str |
||
2656 | call sys_msg_board_str |
||
74 | mario79 | 2657 | pop edx eax |
2658 | jmp return_01 |
||
2659 | ; jmp $ |
||
1 | ha | 2660 | |
2661 | hd_write_error: |
||
2662 | |||
2663 | call clear_hd_cache |
||
2664 | call clear_application_table_status |
||
2665 | mov esi,hd_write_str |
||
2666 | call sys_msg_board_str |
||
74 | mario79 | 2667 | jmp return_02 |
2668 | ; jmp $ |
||
1 | ha | 2669 | |
74 | mario79 | 2670 | hd_lba_error: |
2671 | call clear_hd_cache |
||
2672 | call clear_application_table_status |
||
2673 | mov esi,hd_lba_str |
||
2674 | call sys_msg_board_str |
||
2675 | jmp LBA_read_ret |
||
1 | ha | 2676 | |
2677 | |||
2678 | wait_for_hd_idle: |
||
2679 | |||
2680 | push eax edx |
||
2681 | |||
2682 | call save_hd_wait_timeout |
||
2683 | |||
2684 | mov edx,[hdbase] |
||
2685 | add edx,0x7 |
||
2686 | |||
2687 | wfhil1: |
||
2688 | |||
2689 | call check_hd_wait_timeout |
||
74 | mario79 | 2690 | cmp [hd_error],0 |
2691 | jne @f |
||
1 | ha | 2692 | |
2693 | in al,dx |
||
2694 | test al,128 |
||
2695 | jnz wfhil1 |
||
74 | mario79 | 2696 | |
2697 | @@: |
||
1 | ha | 2698 | |
2699 | pop edx eax |
||
2700 | ret |
||
2701 | |||
2702 | |||
74 | mario79 | 2703 | |
1 | ha | 2704 | wait_for_sector_buffer: |
2705 | |||
2706 | push eax edx |
||
2707 | |||
2708 | mov edx,[hdbase] |
||
2709 | add edx,0x7 |
||
2710 | |||
2711 | call save_hd_wait_timeout |
||
2712 | |||
2713 | hdwait_sbuf: ; wait for sector buffer to be ready |
||
2714 | |||
2715 | call check_hd_wait_timeout |
||
74 | mario79 | 2716 | cmp [hd_error],0 |
2717 | jne @f |
||
1 | ha | 2718 | |
2719 | in al,dx |
||
2720 | test al,8 |
||
2721 | jz hdwait_sbuf |
||
2722 | |||
2723 | mov [hd_error],0 |
||
2724 | |||
2725 | cmp [hd_setup],1 ; do not mark error for setup request |
||
2726 | je buf_wait_ok |
||
2727 | |||
2728 | test al,1 ; previous command ended up with an error |
||
2729 | jz buf_wait_ok |
||
74 | mario79 | 2730 | @@: |
1 | ha | 2731 | mov [hd_error],1 |
2732 | |||
2733 | buf_wait_ok: |
||
2734 | |||
2735 | pop edx eax |
||
2736 | ret |
||
2737 | |||
2738 | |||
2739 | |||
2740 | read_hd_file: |
||
2741 | ;----------------------------------------------------------------- |
||
2742 | ; |
||
2743 | ; Converting old reading function for hd-application start. |
||
2744 | ; |
||
2745 | ; IN: |
||
2746 | ; |
||
2747 | ; eax - pointer to file (0 = read only first sector of drive: eg 'label') |
||
2748 | ; ebx - file lenght |
||
2749 | ; ecx - start 512 byte block number |
||
2750 | ; edx - number of blocks to read |
||
2751 | ; esi - pointer to return/work area (atleast 20 000 bytes) |
||
2752 | ; |
||
2753 | ; For new read function |
||
2754 | ; |
||
2755 | ; EAX (PAR0) pointer to file-name |
||
2756 | ; ECX (PAR1) pointer to buffer |
||
2757 | ; EBX (PAR2) vt file blocks to read |
||
2758 | ; EDX (PAR3) pointer to path |
||
2759 | ; ESI vt first 512 block to read |
||
2760 | ; EDI if 0 - return root |
||
2761 | ;-------------------------------------------------------------------------- |
||
2762 | |||
2763 | push ecx esi edi |
||
2764 | mov esi,eax |
||
2765 | mov edi,startpath |
||
2766 | mov ecx,250 |
||
2767 | cld |
||
2768 | rep movsb |
||
2769 | pop edi esi ecx |
||
2770 | |||
2771 | mov eax,startpath |
||
2772 | mov [eax+ebx-12],byte 0 |
||
2773 | |||
2774 | push eax ebx ecx edx esi |
||
2775 | |||
2776 | pop ecx ; pointer to buffer |
||
2777 | add ecx,1024 |
||
2778 | pop ebx ; number of blocks to read |
||
2779 | pop esi ; first block to read |
||
2780 | dec esi |
||
2781 | pop eax ; file length |
||
2782 | pop edx ; pointer to path |
||
2783 | |||
2784 | mov edi,12 |
||
2785 | lea eax,[eax+edx-12+1] |
||
2786 | call file_read |
||
2787 | |||
2788 | ret |
||
2789 | |||
71 | diamond | 2790 | ; \begin{diamond} |
2791 | hd_find_lfn: |
||
2792 | ; in: esi->name |
||
2793 | ; out: CF=1 - file not found |
||
86 | diamond | 2794 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 2795 | ; destroys eax |
2796 | push esi edi |
||
2797 | push 0 |
||
2798 | push 0 |
||
2799 | push fat16_root_first |
||
2800 | push fat16_root_next |
||
2801 | mov eax, [ROOT_CLUSTER] |
||
2802 | cmp [fat_type], 32 |
||
2803 | jz .fat32 |
||
2804 | .loop: |
||
2805 | call fat_find_lfn |
||
2806 | jc .notfound |
||
2807 | cmp byte [esi], 0 |
||
2808 | jz .found |
||
2809 | test byte [edi+11], 10h |
||
2810 | jz .notfound |
||
2811 | and dword [esp+12], 0 |
||
88 | diamond | 2812 | mov eax, [edi+20-2] |
2813 | mov ax, [edi+26] ; cluster |
||
83 | diamond | 2814 | .fat32: |
2815 | mov [esp+8], eax |
||
2816 | mov dword [esp+4], fat_notroot_first |
||
2817 | mov dword [esp], fat_notroot_next |
||
2818 | jmp .loop |
||
71 | diamond | 2819 | .notfound: |
83 | diamond | 2820 | add esp, 16 |
2821 | pop edi esi |
||
2822 | stc |
||
2823 | ret |
||
71 | diamond | 2824 | .found: |
86 | diamond | 2825 | lea eax, [esp+8] |
2826 | cmp dword [eax], 0 |
||
2827 | jz .root |
||
2828 | call fat_get_sector |
||
2829 | jmp .cmn |
||
2830 | .root: |
||
2831 | mov eax, [eax+4] |
||
2832 | add eax, [ROOT_START] |
||
2833 | .cmn: |
||
83 | diamond | 2834 | add esp, 20 ; CF=0 |
2835 | pop esi |
||
2836 | ret |
||
74 | mario79 | 2837 | |
71 | diamond | 2838 | ;---------------------------------------------------------------- |
2839 | ; |
||
2840 | ; fs_HdRead - LFN variant for reading hard disk |
||
2841 | ; |
||
2842 | ; esi points to filename |
||
2843 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2844 | ; may be ebx=0 - start from first byte |
||
2845 | ; ecx number of bytes to read, 0+ |
||
2846 | ; edx mem location to return data |
||
2847 | ; |
||
77 | diamond | 2848 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 2849 | ; eax = 0 ok read or other = errormsg |
2850 | ; |
||
2851 | ;-------------------------------------------------------------- |
||
2852 | fs_HdRead: |
||
74 | mario79 | 2853 | cmp [fat_type], 0 |
2854 | jnz @f |
||
2855 | or ebx, -1 |
||
2856 | mov eax, ERROR_UNKNOWN_FS |
||
2857 | ret |
||
71 | diamond | 2858 | @@: |
74 | mario79 | 2859 | push edi |
2860 | cmp byte [esi], 0 |
||
2861 | jnz @f |
||
71 | diamond | 2862 | .noaccess: |
74 | mario79 | 2863 | pop edi |
2864 | .noaccess_2: |
||
2865 | or ebx, -1 |
||
2866 | mov eax, ERROR_ACCESS_DENIED |
||
2867 | ret |
||
2868 | |||
2869 | .noaccess_3: |
||
2870 | add esp,4 |
||
2871 | .noaccess_1: |
||
2872 | add esp,4 |
||
2873 | .noaccess_4: |
||
2874 | add esp,4*5 |
||
2875 | jmp .noaccess_2 |
||
2876 | |||
71 | diamond | 2877 | @@: |
74 | mario79 | 2878 | call hd_find_lfn |
2879 | jnc .found |
||
2880 | pop edi |
||
2881 | cmp [hd_error],0 |
||
2882 | jne .noaccess_2 |
||
2883 | or ebx, -1 |
||
2884 | mov eax, ERROR_FILE_NOT_FOUND |
||
2885 | ret |
||
2886 | |||
71 | diamond | 2887 | .found: |
74 | mario79 | 2888 | test byte [edi+11], 0x10 ; do not allow read directories |
2889 | jnz .noaccess |
||
2890 | test ebx, ebx |
||
2891 | jz .l1 |
||
2892 | cmp dword [ebx+4], 0 |
||
2893 | jz @f |
||
77 | diamond | 2894 | xor ebx, ebx |
71 | diamond | 2895 | .reteof: |
74 | mario79 | 2896 | mov eax, 6 |
2897 | pop edi |
||
2898 | ret |
||
71 | diamond | 2899 | @@: |
74 | mario79 | 2900 | mov ebx, [ebx] |
71 | diamond | 2901 | .l1: |
77 | diamond | 2902 | push ecx edx |
2903 | push 0 |
||
2904 | mov eax, [edi+28] |
||
2905 | sub eax, ebx |
||
2906 | jb .eof |
||
2907 | cmp eax, ecx |
||
2908 | jae @f |
||
2909 | mov ecx, eax |
||
2910 | mov byte [esp], 6 |
||
2911 | @@: |
||
74 | mario79 | 2912 | mov eax, [edi+20-2] |
2913 | mov ax, [edi+26] |
||
71 | diamond | 2914 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
2915 | .new_cluster: |
||
74 | mario79 | 2916 | jecxz .new_sector |
2917 | test eax, eax |
||
2918 | jz .eof |
||
2919 | cmp eax, [fatRESERVED] |
||
2920 | jae .eof |
||
2921 | mov [cluster_tmp], eax |
||
2922 | dec eax |
||
2923 | dec eax |
||
2924 | mov edi, [SECTORS_PER_CLUSTER] |
||
2925 | imul eax, edi |
||
2926 | add eax, [DATA_START] |
||
71 | diamond | 2927 | .new_sector: |
74 | mario79 | 2928 | test ecx, ecx |
2929 | jz .done |
||
2930 | sub ebx, 512 |
||
2931 | jae .skip |
||
2932 | add ebx, 512 |
||
2933 | jnz .force_buf |
||
2934 | cmp ecx, 512 |
||
2935 | jb .force_buf |
||
71 | diamond | 2936 | ; we may read directly to given buffer |
74 | mario79 | 2937 | push ebx |
2938 | mov ebx, edx |
||
2939 | call hd_read |
||
2940 | cmp [hd_error],0 |
||
2941 | jne .noaccess_1 |
||
2942 | pop ebx |
||
2943 | add edx, 512 |
||
2944 | sub ecx, 512 |
||
2945 | jmp .skip |
||
71 | diamond | 2946 | .force_buf: |
2947 | ; we must read sector to temporary buffer and then copy it to destination |
||
74 | mario79 | 2948 | push eax ebx |
2949 | mov ebx, buffer |
||
2950 | call hd_read |
||
2951 | cmp [hd_error],0 |
||
2952 | jne .noaccess_3 |
||
2953 | |||
2954 | mov eax, ebx |
||
2955 | pop ebx |
||
2956 | add eax, ebx |
||
2957 | push ecx |
||
2958 | add ecx, ebx |
||
2959 | cmp ecx, 512 |
||
2960 | jbe @f |
||
2961 | mov ecx, 512 |
||
71 | diamond | 2962 | @@: |
74 | mario79 | 2963 | sub ecx, ebx |
2964 | mov ebx, edx |
||
2965 | call memmove |
||
2966 | add edx, ecx |
||
2967 | sub [esp], ecx |
||
2968 | pop ecx |
||
2969 | pop eax |
||
2970 | xor ebx, ebx |
||
71 | diamond | 2971 | .skip: |
74 | mario79 | 2972 | inc eax |
2973 | dec edi |
||
2974 | jnz .new_sector |
||
2975 | mov eax, [cluster_tmp] |
||
2976 | call get_FAT |
||
2977 | cmp [hd_error],0 |
||
2978 | jne .noaccess_4 |
||
2979 | |||
2980 | jmp .new_cluster |
||
71 | diamond | 2981 | .done: |
77 | diamond | 2982 | mov ebx, edx |
2983 | pop eax edx ecx edi |
||
2984 | sub ebx, edx |
||
2985 | ret |
||
71 | diamond | 2986 | .eof: |
77 | diamond | 2987 | mov ebx, edx |
2988 | pop eax edx ecx |
||
2989 | sub ebx, edx |
||
2990 | jmp .reteof |
||
75 | diamond | 2991 | |
2992 | ;---------------------------------------------------------------- |
||
2993 | ; |
||
2994 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
2995 | ; |
||
2996 | ; esi points to filename |
||
78 | diamond | 2997 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
2998 | ; & flags (bitfields) |
||
2999 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 3000 | ; ecx number of blocks to read, 0+ |
3001 | ; edx mem location to return data |
||
3002 | ; |
||
77 | diamond | 3003 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 3004 | ; eax = 0 ok read or other = errormsg |
3005 | ; |
||
3006 | ;-------------------------------------------------------------- |
||
3007 | fs_HdReadFolder: |
||
3008 | mov eax, [ROOT_CLUSTER] |
||
3009 | push edi |
||
3010 | cmp byte [esi], 0 |
||
3011 | jz .doit |
||
3012 | call hd_find_lfn |
||
3013 | jnc .found |
||
3014 | pop edi |
||
3015 | or ebx, -1 |
||
3016 | mov eax, ERROR_FILE_NOT_FOUND |
||
3017 | ret |
||
3018 | .found: |
||
3019 | test byte [edi+11], 0x10 ; do not allow read files |
||
3020 | jnz .found_dir |
||
3021 | pop edi |
||
3022 | or ebx, -1 |
||
3023 | mov eax, ERROR_ACCESS_DENIED |
||
3024 | ret |
||
3025 | .found_dir: |
||
3026 | mov eax, [edi+20-2] |
||
3027 | mov ax, [edi+26] ; eax=cluster |
||
3028 | .doit: |
||
3029 | push esi ecx |
||
3030 | push ebp |
||
3031 | sub esp, 262*2 ; reserve space for LFN |
||
3032 | mov ebp, esp |
||
78 | diamond | 3033 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
3034 | mov ebx, [ebx] |
||
75 | diamond | 3035 | ; init header |
3036 | push eax ecx |
||
3037 | mov edi, edx |
||
3038 | mov ecx, 32/4 |
||
3039 | xor eax, eax |
||
3040 | rep stosd |
||
3041 | pop ecx eax |
||
3042 | mov byte [edx], 1 ; version |
||
3043 | mov esi, edi ; esi points to BDFE |
||
3044 | .new_cluster: |
||
3045 | mov [cluster_tmp], eax |
||
3046 | test eax, eax |
||
3047 | jnz @f |
||
3048 | cmp [fat_type], 32 |
||
3049 | jz .notfound |
||
3050 | mov eax, [ROOT_START] |
||
3051 | push [ROOT_SECTORS] |
||
3052 | push ebx |
||
3053 | jmp .new_sector |
||
3054 | @@: |
||
3055 | dec eax |
||
3056 | dec eax |
||
3057 | imul eax, [SECTORS_PER_CLUSTER] |
||
3058 | push [SECTORS_PER_CLUSTER] |
||
3059 | add eax, [DATA_START] |
||
3060 | push ebx |
||
3061 | .new_sector: |
||
3062 | mov ebx, buffer |
||
3063 | mov edi, ebx |
||
3064 | call hd_read |
||
3065 | cmp [hd_error], 0 |
||
3066 | jnz .notfound2 |
||
3067 | add ebx, 512 |
||
3068 | push eax |
||
3069 | .l1: |
||
3070 | call fat_get_name |
||
3071 | jc .l2 |
||
3072 | cmp byte [edi+11], 0xF |
||
3073 | jnz .do_bdfe |
||
3074 | add edi, 0x20 |
||
3075 | cmp edi, ebx |
||
3076 | jb .do_bdfe |
||
3077 | pop eax |
||
3078 | inc eax |
||
3079 | dec dword [esp+4] |
||
3080 | jnz @f |
||
3081 | mov eax, [cluster_tmp] |
||
3082 | test eax, eax |
||
3083 | jz .done |
||
3084 | call get_FAT |
||
3085 | cmp [hd_error], 0 |
||
3086 | jnz .notfound2 |
||
3087 | cmp eax, 2 |
||
3088 | jb .done |
||
3089 | cmp eax, [fatRESERVED] |
||
3090 | jae .done |
||
3091 | push eax |
||
3092 | mov eax, [SECTORS_PER_CLUSTER] |
||
3093 | mov [esp+8], eax |
||
3094 | pop eax |
||
3095 | mov [cluster_tmp], eax |
||
3096 | dec eax |
||
3097 | dec eax |
||
3098 | imul eax, [SECTORS_PER_CLUSTER] |
||
3099 | add eax, [DATA_START] |
||
3100 | @@: |
||
3101 | mov ebx, buffer |
||
3102 | mov edi, ebx |
||
3103 | call hd_read |
||
3104 | cmp [hd_error], 0 |
||
3105 | jnz .notfound2 |
||
3106 | add ebx, 512 |
||
3107 | push eax |
||
3108 | .do_bdfe: |
||
3109 | inc dword [edx+8] ; new file found |
||
3110 | dec dword [esp+4] |
||
3111 | jns .l2 |
||
3112 | dec ecx |
||
3113 | js .l2 |
||
3114 | inc dword [edx+4] ; new file block copied |
||
3115 | call fat_entry_to_bdfe |
||
3116 | .l2: |
||
3117 | add edi, 0x20 |
||
3118 | cmp edi, ebx |
||
3119 | jb .l1 |
||
3120 | pop eax |
||
3121 | inc eax |
||
3122 | dec dword [esp+4] |
||
3123 | jnz .new_sector |
||
3124 | mov eax, [cluster_tmp] |
||
3125 | test eax, eax |
||
3126 | jz .done |
||
3127 | call get_FAT |
||
3128 | cmp [hd_error], 0 |
||
3129 | jnz .notfound2 |
||
3130 | cmp eax, 2 |
||
3131 | jb .done |
||
3132 | cmp eax, [fatRESERVED] |
||
3133 | jae .done |
||
3134 | push eax |
||
3135 | mov eax, [SECTORS_PER_CLUSTER] |
||
3136 | mov [esp+8], eax |
||
3137 | pop eax |
||
3138 | pop ebx |
||
3139 | add esp, 4 |
||
3140 | jmp .new_cluster |
||
3141 | .notfound2: |
||
3142 | add esp, 8 |
||
3143 | .notfound: |
||
3144 | add esp, 262*2+4 |
||
3145 | pop ebp ecx esi edi |
||
3146 | mov eax, ERROR_FILE_NOT_FOUND |
||
3147 | or ebx, -1 |
||
3148 | ret |
||
3149 | .done: |
||
3150 | add esp, 262*2+4+8 |
||
3151 | pop ebp |
||
77 | diamond | 3152 | mov ebx, [edx+4] |
75 | diamond | 3153 | xor eax, eax |
3154 | dec ecx |
||
3155 | js @f |
||
3156 | mov al, ERROR_END_OF_FILE |
||
3157 | @@: |
||
3158 | pop ecx esi edi |
||
3159 | ret |
||
3160 | |||
83 | diamond | 3161 | fat16_root_next: |
3162 | cmp edi, buffer+0x200-0x20 |
||
3163 | jae fat16_root_next_sector |
||
3164 | add edi, 0x20 |
||
3165 | ret ; CF=0 |
||
3166 | fat16_root_next_sector: |
||
3167 | ; read next sector |
||
3168 | push ecx |
||
3169 | mov ecx, [eax+4] |
||
3170 | inc ecx |
||
3171 | mov [eax+4], ecx |
||
3172 | cmp ecx, [ROOT_SECTORS] |
||
3173 | pop ecx |
||
3174 | jae fat16_root_first.readerr |
||
3175 | fat16_root_first: |
||
3176 | mov eax, [eax+4] |
||
3177 | add eax, [ROOT_START] |
||
3178 | push ebx |
||
3179 | mov edi, buffer |
||
3180 | mov ebx, edi |
||
3181 | call hd_read |
||
3182 | pop ebx |
||
3183 | cmp [hd_error], 0 |
||
3184 | jnz .readerr |
||
3185 | ret ; CF=0 |
||
3186 | .readerr: |
||
3187 | stc |
||
3188 | ret |
||
3189 | fat16_root_begin_write: |
||
3190 | push edi eax |
||
3191 | call fat16_root_first |
||
3192 | pop eax edi |
||
3193 | ret |
||
3194 | fat16_root_end_write: |
||
3195 | pusha |
||
3196 | mov eax, [eax+4] |
||
3197 | add eax, [ROOT_START] |
||
3198 | mov ebx, buffer |
||
3199 | call hd_write |
||
3200 | popa |
||
3201 | ret |
||
3202 | fat16_root_next_write: |
||
3203 | cmp edi, buffer+0x200 |
||
3204 | jae @f |
||
3205 | ret |
||
3206 | @@: |
||
3207 | call fat16_root_end_write |
||
3208 | jmp fat16_root_next_sector |
||
3209 | fat16_root_extend_dir: |
||
3210 | stc |
||
3211 | ret |
||
3212 | |||
3213 | fat_notroot_next: |
||
3214 | cmp edi, buffer+0x200-0x20 |
||
3215 | jae fat_notroot_next_sector |
||
3216 | add edi, 0x20 |
||
3217 | ret ; CF=0 |
||
3218 | fat_notroot_next_sector: |
||
3219 | push ecx |
||
3220 | mov ecx, [eax+4] |
||
3221 | inc ecx |
||
3222 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
3223 | jae fat_notroot_next_cluster |
||
3224 | mov [eax+4], ecx |
||
3225 | jmp @f |
||
3226 | fat_notroot_next_cluster: |
||
3227 | push eax |
||
3228 | mov eax, [eax] |
||
3229 | call get_FAT |
||
3230 | mov ecx, eax |
||
3231 | pop eax |
||
3232 | cmp [hd_error], 0 |
||
3233 | jnz fat_notroot_next_err |
||
3234 | cmp ecx, [fatRESERVED] |
||
3235 | jae fat_notroot_next_err |
||
3236 | mov [eax], ecx |
||
3237 | and dword [eax+4], 0 |
||
3238 | @@: |
||
3239 | pop ecx |
||
3240 | fat_notroot_first: |
||
3241 | call fat_get_sector |
||
3242 | push ebx |
||
3243 | mov edi, buffer |
||
3244 | mov ebx, edi |
||
3245 | call hd_read |
||
3246 | pop ebx |
||
3247 | cmp [hd_error], 0 |
||
3248 | jnz @f |
||
3249 | ret ; CF=0 |
||
3250 | fat_notroot_next_err: |
||
3251 | pop ecx |
||
3252 | @@: |
||
3253 | stc |
||
3254 | ret |
||
3255 | fat_notroot_begin_write: |
||
3256 | push eax edi |
||
3257 | call fat_notroot_first |
||
3258 | pop edi eax |
||
3259 | ret |
||
3260 | fat_notroot_end_write: |
||
3261 | call fat_get_sector |
||
3262 | push ebx |
||
3263 | mov ebx, buffer |
||
3264 | call hd_write |
||
3265 | pop ebx |
||
3266 | ret |
||
3267 | fat_notroot_next_write: |
||
3268 | cmp edi, buffer+0x200 |
||
3269 | jae @f |
||
3270 | ret |
||
3271 | @@: |
||
3272 | push eax |
||
3273 | call fat_notroot_end_write |
||
3274 | pop eax |
||
3275 | jmp fat_notroot_next_sector |
||
3276 | fat_notroot_extend_dir: |
||
3277 | push eax |
||
3278 | mov eax, [eax] |
||
3279 | call get_free_FAT |
||
3280 | jnc .found |
||
3281 | pop eax |
||
3282 | ret ; CF=1 |
||
3283 | .found: |
||
3284 | push edx |
||
3285 | mov edx, [fatEND] |
||
3286 | call set_FAT |
||
3287 | mov edx, eax |
||
3288 | mov eax, [esp+4] |
||
3289 | mov eax, [eax] |
||
3290 | push edx |
||
3291 | mov [f_del], 1 |
||
3292 | call set_FAT |
||
3293 | pop edx |
||
3294 | cmp [hd_error], 0 |
||
3295 | jz @f |
||
3296 | pop edx |
||
3297 | pop eax |
||
3298 | stc |
||
3299 | ret |
||
3300 | @@: |
||
3301 | push ecx |
||
3302 | or ecx, -1 |
||
3303 | call add_disk_free_space |
||
3304 | ; zero new cluster |
||
3305 | mov ecx, 512/4 |
||
3306 | mov edi, buffer |
||
3307 | push edi |
||
3308 | xor eax, eax |
||
3309 | rep stosd |
||
3310 | pop edi |
||
3311 | pop ecx |
||
3312 | mov eax, [esp+4] |
||
3313 | mov [eax], edx |
||
3314 | and dword [eax+4], 0 |
||
3315 | pop edx |
||
3316 | mov eax, [eax] |
||
3317 | dec eax |
||
3318 | dec eax |
||
3319 | push ebx ecx |
||
3320 | mov ecx, [SECTORS_PER_CLUSTER] |
||
3321 | imul eax, ecx |
||
3322 | add eax, [DATA_START] |
||
3323 | mov ebx, edi |
||
3324 | @@: |
||
3325 | call hd_write |
||
3326 | inc eax |
||
3327 | loop @b |
||
3328 | pop ecx ebx eax |
||
3329 | clc |
||
3330 | ret |
||
3331 | |||
3332 | fat_get_sector: |
||
3333 | push ecx |
||
3334 | mov ecx, [eax] |
||
3335 | dec ecx |
||
3336 | dec ecx |
||
3337 | imul ecx, [SECTORS_PER_CLUSTER] |
||
3338 | add ecx, [DATA_START] |
||
3339 | add ecx, [eax+4] |
||
3340 | mov eax, ecx |
||
3341 | pop ecx |
||
3342 | ret |
||
3343 | |||
3344 | ;---------------------------------------------------------------- |
||
3345 | ; |
||
3346 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
3347 | ; |
||
3348 | ; esi points to filename |
||
3349 | ; ebx ignored (reserved) |
||
3350 | ; ecx number of bytes to write, 0+ |
||
3351 | ; edx mem location to data |
||
3352 | ; |
||
3353 | ; ret ebx = number of written bytes |
||
3354 | ; eax = 0 ok read or other = errormsg |
||
3355 | ; |
||
3356 | ;-------------------------------------------------------------- |
||
3357 | fshrad: |
||
3358 | mov eax, ERROR_ACCESS_DENIED |
||
3359 | xor ebx, ebx |
||
3360 | ret |
||
3361 | fshrfs: |
||
3362 | mov eax, ERROR_UNKNOWN_FS |
||
3363 | xor ebx, ebx |
||
3364 | ret |
||
3365 | |||
3366 | fs_HdRewrite: |
||
3367 | cmp [fat_type], 0 |
||
3368 | jz fshrfs |
||
3369 | cmp byte [esi], 0 |
||
3370 | jz fshrad |
||
3371 | pushad |
||
3372 | xor ebp, ebp |
||
3373 | push esi |
||
3374 | @@: |
||
3375 | lodsb |
||
3376 | test al, al |
||
3377 | jz @f |
||
3378 | cmp al, '/' |
||
3379 | jnz @b |
||
3380 | lea ebp, [esi-1] |
||
3381 | jmp @b |
||
3382 | @@: |
||
3383 | pop esi |
||
3384 | test ebp, ebp |
||
3385 | jnz .noroot |
||
3386 | mov ebp, [ROOT_CLUSTER] |
||
3387 | cmp [fat_type], 32 |
||
3388 | jz .pushnotroot |
||
3389 | push fat16_root_extend_dir |
||
3390 | push fat16_root_end_write |
||
3391 | push fat16_root_next_write |
||
3392 | push fat16_root_begin_write |
||
3393 | xor ebp, ebp |
||
3394 | push ebp |
||
3395 | push ebp |
||
3396 | push fat16_root_first |
||
3397 | push fat16_root_next |
||
3398 | jmp .common1 |
||
3399 | .noroot: |
||
3400 | ; check existence |
||
3401 | mov byte [ebp], 0 |
||
3402 | call hd_find_lfn |
||
3403 | mov byte [ebp], '/' |
||
3404 | lea esi, [ebp+1] |
||
3405 | jnc @f |
||
3406 | mov eax, ERROR_FILE_NOT_FOUND |
||
3407 | .ret1: |
||
3408 | mov [esp+28], eax |
||
3409 | popad |
||
3410 | xor ebx, ebx |
||
3411 | ret |
||
3412 | @@: |
||
3413 | test byte [edi+11], 0x10 ; must be directory |
||
3414 | mov eax, ERROR_ACCESS_DENIED |
||
3415 | jz .ret1 |
||
3416 | mov ebp, [edi+20-2] |
||
3417 | mov bp, [edi+26] ; ebp=cluster |
||
3418 | mov eax, ERROR_FAT_TABLE |
||
3419 | cmp ebp, 2 |
||
3420 | jb .ret1 |
||
3421 | .pushnotroot: |
||
3422 | push fat_notroot_extend_dir |
||
3423 | push fat_notroot_end_write |
||
3424 | push fat_notroot_next_write |
||
3425 | push fat_notroot_begin_write |
||
3426 | push 0 |
||
3427 | push ebp |
||
3428 | push fat_notroot_first |
||
3429 | push fat_notroot_next |
||
3430 | .common1: |
||
3431 | call fat_find_lfn |
||
3432 | jc .notfound |
||
91 | diamond | 3433 | ; found; must not be directory |
3434 | test byte [edi+11], 10h |
||
3435 | jz @f |
||
3436 | add esp, 32 |
||
3437 | popad |
||
3438 | mov eax, ERROR_ACCESS_DENIED |
||
3439 | xor ebx, ebx |
||
3440 | ret |
||
3441 | @@: |
||
3442 | ; delete FAT chain |
||
83 | diamond | 3443 | push edi |
3444 | xor eax, eax |
||
3445 | mov dword [edi+28], eax ; zero size |
||
3446 | xor ecx, ecx |
||
3447 | mov eax, [edi+20-2] |
||
3448 | mov ax, [edi+26] |
||
3449 | mov word [edi+20], cx |
||
3450 | mov word [edi+26], cx |
||
3451 | test eax, eax |
||
3452 | jz .done1 |
||
3453 | mov [f_del], 1 |
||
3454 | @@: |
||
3455 | cmp eax, [fatRESERVED] |
||
3456 | jae .done1 |
||
3457 | push edx |
||
3458 | xor edx, edx |
||
3459 | call set_FAT |
||
3460 | mov eax, edx |
||
3461 | pop edx |
||
3462 | inc ecx |
||
3463 | jmp @b |
||
3464 | .done1: |
||
3465 | pop edi |
||
3466 | call get_time_for_file |
||
3467 | mov [edi+22], ax |
||
3468 | call get_date_for_file |
||
3469 | mov [edi+24], ax |
||
3470 | mov [edi+18], ax |
||
3471 | or byte [edi+11], 20h ; set 'archive' attribute |
||
3472 | jmp .doit |
||
3473 | .notfound: |
||
3474 | ; file is not found; generate short name |
||
3475 | call fat_name_is_legal |
||
3476 | jc @f |
||
3477 | add esp, 32 |
||
3478 | popad |
||
3479 | mov eax, ERROR_FILE_NOT_FOUND |
||
3480 | xor ebx, ebx |
||
3481 | ret |
||
3482 | @@: |
||
3483 | sub esp, 12 |
||
3484 | mov edi, esp |
||
3485 | call fat_gen_short_name |
||
3486 | .test_short_name_loop: |
||
3487 | push esi edi ecx |
||
3488 | mov esi, edi |
||
3489 | lea eax, [esp+12+12+8] |
||
3490 | mov [eax], ebp |
||
3491 | and dword [eax+4], 0 |
||
3492 | call dword [eax-4] |
||
3493 | jc .found |
||
3494 | .test_short_name_entry: |
||
3495 | cmp byte [edi+11], 0xF |
||
3496 | jz .test_short_name_cont |
||
3497 | mov ecx, 11 |
||
3498 | push esi edi |
||
3499 | repz cmpsb |
||
3500 | pop edi esi |
||
3501 | jz .short_name_found |
||
3502 | .test_short_name_cont: |
||
3503 | lea eax, [esp+12+12+8] |
||
3504 | call dword [eax-8] |
||
3505 | jnc .test_short_name_entry |
||
3506 | jmp .found |
||
3507 | .short_name_found: |
||
3508 | pop ecx edi esi |
||
3509 | call fat_next_short_name |
||
3510 | jnc .test_short_name_loop |
||
3511 | .disk_full: |
||
3512 | add esp, 12+32 |
||
3513 | popa |
||
3514 | mov eax, ERROR_DISK_FULL |
||
3515 | xor ebx, ebx |
||
3516 | ret |
||
3517 | .found: |
||
3518 | pop ecx edi esi |
||
3519 | ; now find space in directory |
||
3520 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
3521 | mov al, '~' |
||
3522 | push ecx edi |
||
3523 | mov ecx, 8 |
||
3524 | repnz scasb |
||
3525 | push 1 |
||
3526 | pop eax ; 1 entry |
||
3527 | jnz .notilde |
||
3528 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
3529 | xor eax, eax |
||
3530 | @@: |
||
3531 | cmp byte [esi], 0 |
||
3532 | jz @f |
||
3533 | inc esi |
||
3534 | inc eax |
||
3535 | jmp @b |
||
3536 | @@: |
||
3537 | sub esi, eax |
||
3538 | add eax, 12+13 |
||
3539 | mov ecx, 13 |
||
3540 | push edx |
||
3541 | cdq |
||
3542 | div ecx |
||
3543 | pop edx |
||
3544 | .notilde: |
||
3545 | push -1 |
||
3546 | push -1 |
||
3547 | push -1 |
||
3548 | ; find |
||
3549 | xor ecx, ecx |
||
3550 | push eax |
||
3551 | lea eax, [esp+16+8+12+8] |
||
3552 | mov [eax], ebp |
||
3553 | and dword [eax+4], 0 |
||
3554 | call dword [eax-4] |
||
3555 | pop eax |
||
3556 | jnc .scan_dir |
||
3557 | .fsfrfe3: |
||
3558 | add esp, 12+8+12+32 |
||
3559 | popad |
||
3560 | mov eax, 11 |
||
3561 | xor ebx, ebx |
||
3562 | ret |
||
3563 | .scan_dir: |
||
3564 | cmp byte [edi], 0 |
||
3565 | jz .free |
||
3566 | cmp byte [edi], 0xE5 |
||
3567 | jz .free |
||
3568 | xor ecx, ecx |
||
3569 | .scan_cont: |
||
3570 | push eax |
||
3571 | lea eax, [esp+16+8+12+8] |
||
3572 | call dword [eax-8] |
||
3573 | pop eax |
||
3574 | jnc .scan_dir |
||
3575 | cmp [hd_error], 0 |
||
3576 | jnz .fsfrfe3 |
||
3577 | push eax |
||
3578 | lea eax, [esp+16+8+12+8] |
||
3579 | call dword [eax+20] ; extend directory |
||
3580 | pop eax |
||
3581 | jnc .scan_dir |
||
3582 | add esp, 12+8+12+32 |
||
3583 | popad |
||
3584 | mov eax, ERROR_DISK_FULL |
||
3585 | xor ebx, ebx |
||
3586 | ret |
||
3587 | .free: |
||
3588 | test ecx, ecx |
||
3589 | jnz @f |
||
3590 | mov [esp], edi |
||
3591 | mov ecx, [esp+12+8+12+8] |
||
3592 | mov [esp+4], ecx |
||
3593 | mov ecx, [esp+12+8+12+12] |
||
3594 | mov [esp+8], ecx |
||
3595 | xor ecx, ecx |
||
3596 | @@: |
||
3597 | inc ecx |
||
3598 | cmp ecx, eax |
||
3599 | jb .scan_cont |
||
3600 | ; found! |
||
3601 | ; calculate name checksum |
||
3602 | push esi ecx |
||
3603 | mov esi, [esp+8+12] |
||
3604 | mov ecx, 11 |
||
3605 | xor eax, eax |
||
3606 | @@: |
||
3607 | ror al, 1 |
||
3608 | add al, [esi] |
||
3609 | inc esi |
||
3610 | loop @b |
||
3611 | pop ecx esi |
||
3612 | pop edi |
||
3613 | pop dword [esp+8+12+12] |
||
3614 | pop dword [esp+8+12+12] |
||
3615 | ; edi points to first entry in free chunk |
||
3616 | dec ecx |
||
3617 | jz .nolfn |
||
3618 | push esi |
||
3619 | push eax |
||
3620 | lea eax, [esp+8+8+12+8] |
||
3621 | call dword [eax+8] ; begin write |
||
3622 | mov al, 40h |
||
3623 | .writelfn: |
||
3624 | or al, cl |
||
3625 | mov esi, [esp+4] |
||
3626 | push ecx |
||
3627 | dec ecx |
||
3628 | imul ecx, 13 |
||
3629 | add esi, ecx |
||
3630 | stosb |
||
3631 | mov cl, 5 |
||
3632 | call fs_RamdiskRewrite.read_symbols |
||
3633 | mov ax, 0xF |
||
3634 | stosw |
||
3635 | mov al, [esp+4] |
||
3636 | stosb |
||
3637 | mov cl, 6 |
||
3638 | call fs_RamdiskRewrite.read_symbols |
||
3639 | xor eax, eax |
||
3640 | stosw |
||
3641 | mov cl, 2 |
||
3642 | call fs_RamdiskRewrite.read_symbols |
||
3643 | pop ecx |
||
3644 | lea eax, [esp+8+8+12+8] |
||
3645 | call dword [eax+12] ; next write |
||
3646 | xor eax, eax |
||
3647 | loop .writelfn |
||
3648 | pop eax |
||
3649 | pop esi |
||
3650 | ; lea eax, [esp+8+12+8] |
||
3651 | ; call dword [eax+16] ; end write |
||
3652 | .nolfn: |
||
3653 | xchg esi, [esp] |
||
3654 | mov ecx, 11 |
||
3655 | rep movsb |
||
3656 | mov word [edi], 20h ; attributes |
||
3657 | sub edi, 11 |
||
3658 | pop esi ecx |
||
3659 | add esp, 12 |
||
3660 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
3661 | call get_time_for_file |
||
3662 | mov [edi+14], ax ; creation time |
||
3663 | mov [edi+22], ax ; last write time |
||
3664 | call get_date_for_file |
||
3665 | mov [edi+16], ax ; creation date |
||
3666 | mov [edi+24], ax ; last write date |
||
3667 | mov [edi+18], ax ; last access date |
||
3668 | xor ecx, ecx |
||
3669 | mov word [edi+20], cx ; high word of cluster |
||
3670 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
3671 | mov dword [edi+28], ecx ; file size - to be filled |
||
3672 | .doit: |
||
3673 | lea eax, [esp+8] |
||
3674 | call dword [eax+16] ; flush directory |
||
3675 | push ecx |
||
3676 | mov ecx, [esp+4+32+24] |
||
3677 | push ecx |
||
3678 | push edi |
||
3679 | mov esi, edx |
||
3680 | test ecx, ecx |
||
3681 | jz .done |
||
3682 | mov eax, 2 |
||
3683 | call get_free_FAT |
||
3684 | jc .diskfull |
||
3685 | push eax |
||
3686 | mov [edi+26], ax |
||
3687 | shr eax, 16 |
||
3688 | mov [edi+20], ax |
||
3689 | lea eax, [esp+16+8] |
||
3690 | call dword [eax+16] ; flush directory |
||
3691 | pop eax |
||
3692 | push edx |
||
3693 | mov edx, [fatEND] |
||
3694 | call set_FAT |
||
3695 | pop edx |
||
3696 | .write_cluster: |
||
3697 | push eax |
||
3698 | dec eax |
||
3699 | dec eax |
||
3700 | mov ebp, [SECTORS_PER_CLUSTER] |
||
3701 | imul eax, ebp |
||
3702 | add eax, [DATA_START] |
||
3703 | ; write data |
||
3704 | .write_sector: |
||
3705 | mov ecx, 512 |
||
3706 | cmp dword [esp+8], ecx |
||
3707 | jb .writeshort |
||
3708 | ; we can write directly from given buffer |
||
3709 | mov ebx, esi |
||
3710 | add esi, ecx |
||
3711 | jmp .writecommon |
||
3712 | .writeshort: |
||
3713 | mov ecx, [esp+8] |
||
3714 | push ecx |
||
3715 | mov edi, buffer |
||
3716 | mov ebx, edi |
||
3717 | rep movsb |
||
3718 | mov ecx, buffer+0x200 |
||
3719 | sub ecx, edi |
||
3720 | push eax |
||
3721 | xor eax, eax |
||
3722 | rep stosb |
||
3723 | pop eax |
||
3724 | pop ecx |
||
3725 | .writecommon: |
||
3726 | call hd_write |
||
3727 | cmp [hd_error], 0 |
||
3728 | jnz .writeerr |
||
3729 | inc eax |
||
3730 | sub dword [esp+8], ecx |
||
3731 | jz .writedone |
||
3732 | dec ebp |
||
3733 | jnz .write_sector |
||
3734 | ; allocate new cluster |
||
3735 | pop eax |
||
3736 | mov ecx, eax |
||
3737 | call get_free_FAT |
||
3738 | jc .diskfull |
||
3739 | mov [f_del], 1 |
||
3740 | push edx |
||
3741 | mov edx, [fatEND] |
||
3742 | call set_FAT |
||
3743 | xchg eax, ecx |
||
3744 | mov edx, ecx |
||
3745 | call set_FAT |
||
3746 | pop edx |
||
3747 | xchg eax, ecx |
||
3748 | jmp .write_cluster |
||
3749 | .diskfull: |
||
3750 | mov eax, ERROR_DISK_FULL |
||
3751 | jmp .ret |
||
3752 | .writeerr: |
||
3753 | pop eax |
||
3754 | sub esi, ecx |
||
3755 | mov eax, 11 |
||
3756 | jmp .ret |
||
3757 | .writedone: |
||
3758 | pop eax |
||
3759 | .done: |
||
3760 | xor eax, eax |
||
3761 | .ret: |
||
3762 | pop edi ecx |
||
3763 | mov ebx, esi |
||
3764 | sub ebx, edx |
||
3765 | pop ebp |
||
3766 | mov [esp+32+28], eax |
||
3767 | lea eax, [esp+8] |
||
3768 | call dword [eax+8] |
||
3769 | mov [edi+28], ebx |
||
3770 | call dword [eax+16] |
||
3771 | mov [esp+32+16], ebx |
||
3772 | lea eax, [ebx+511] |
||
3773 | shr eax, 9 |
||
3774 | mov ecx, [SECTORS_PER_CLUSTER] |
||
3775 | lea eax, [eax+ecx-1] |
||
3776 | xor edx, edx |
||
3777 | div ecx |
||
3778 | mov ecx, ebp |
||
3779 | sub ecx, eax |
||
3780 | call add_disk_free_space |
||
3781 | add esp, 32 |
||
3782 | call update_disk |
||
3783 | popad |
||
3784 | ret |
||
3785 | |||
86 | diamond | 3786 | fs_HdGetFileInfo: |
3787 | cmp [fat_type], 0 |
||
3788 | jnz @f |
||
3789 | mov eax, ERROR_UNKNOWN_FS |
||
3790 | ret |
||
3791 | @@: |
||
3792 | cmp byte [esi], 0 |
||
3793 | jnz @f |
||
3794 | mov eax, 2 |
||
3795 | ret |
||
3796 | @@: |
||
3797 | push edi |
||
3798 | call hd_find_lfn |
||
3799 | pushfd |
||
3800 | cmp [hd_error], 0 |
||
3801 | jz @f |
||
3802 | popfd |
||
3803 | pop edi |
||
3804 | mov eax, 11 |
||
3805 | ret |
||
3806 | @@: |
||
3807 | popfd |
||
3808 | jmp fs_GetFileInfo_finish |
||
3809 | |||
3810 | fs_HdSetFileInfo: |
||
3811 | cmp [fat_type], 0 |
||
3812 | jnz @f |
||
3813 | mov eax, ERROR_UNKNOWN_FS |
||
3814 | ret |
||
3815 | @@: |
||
3816 | cmp byte [esi], 0 |
||
3817 | jnz @f |
||
3818 | mov eax, 2 |
||
3819 | ret |
||
3820 | @@: |
||
3821 | push edi |
||
3822 | call hd_find_lfn |
||
3823 | pushfd |
||
3824 | cmp [hd_error], 0 |
||
3825 | jz @f |
||
3826 | popfd |
||
3827 | pop edi |
||
3828 | mov eax, 11 |
||
3829 | ret |
||
3830 | @@: |
||
3831 | popfd |
||
3832 | jnc @f |
||
3833 | pop edi |
||
3834 | mov eax, ERROR_FILE_NOT_FOUND |
||
3835 | ret |
||
3836 | @@: |
||
3837 | push eax |
||
3838 | call bdfe_to_fat_entry |
||
3839 | pop eax |
||
3840 | mov ebx, buffer |
||
3841 | call hd_write |
||
3842 | call update_disk |
||
3843 | pop edi |
||
3844 | xor eax, eax |
||
3845 | ret |
||
3846 | |||
91 | diamond | 3847 | ;---------------------------------------------------------------- |
3848 | ; |
||
3849 | ; fs_HdExecute - LFN variant for executing from harddisk |
||
3850 | ; |
||
3851 | ; esi points to hd filename (e.g. 'dir1/name') |
||
3852 | ; ebp points to full filename (e.g. '/hd0/1/dir1/name') |
||
3853 | ; dword [ebx] = flags |
||
3854 | ; dword [ebx+4] = cmdline |
||
3855 | ; |
||
3856 | ; ret ebx,edx destroyed |
||
3857 | ; eax > 0 - PID, < 0 - error |
||
3858 | ; |
||
3859 | ;-------------------------------------------------------------- |
||
3860 | fs_HdExecute: |
||
3861 | mov edx, [ebx] |
||
3862 | mov ebx, [ebx+4] |
||
3863 | test ebx, ebx |
||
3864 | jz @f |
||
3865 | add ebx, std_application_base_address |
||
3866 | @@: |
||
3867 | |||
3868 | ;---------------------------------------------------------------- |
||
3869 | ; |
||
3870 | ; fs_HdExecute.flags - second entry |
||
3871 | ; |
||
3872 | ; esi points to floppy filename (kernel address) |
||
3873 | ; ebp points to full filename |
||
3874 | ; edx flags |
||
3875 | ; ebx cmdline (kernel address) |
||
3876 | ; |
||
3877 | ; ret eax > 0 - PID, < 0 - error |
||
3878 | ; |
||
3879 | ;-------------------------------------------------------------- |
||
3880 | |||
3881 | .flags: |
||
3882 | cmp [fat_type], 0 |
||
3883 | jnz @f |
||
3884 | mov eax, ERROR_UNKNOWN_FS |
||
3885 | ret |
||
3886 | @@: |
||
3887 | cmp byte [esi], 0 |
||
3888 | jnz @f |
||
3889 | ; cannot execute root! |
||
3890 | mov eax, -ERROR_ACCESS_DENIED |
||
3891 | ret |
||
3892 | @@: |
||
3893 | push edi |
||
3894 | call hd_find_lfn |
||
3895 | jnc .found |
||
3896 | pop edi |
||
3897 | mov eax, -ERROR_FILE_NOT_FOUND |
||
3898 | cmp [hd_error], 0 |
||
3899 | jz @f |
||
3900 | mov al, -11 |
||
3901 | @@: |
||
3902 | ret |
||
3903 | .found: |
||
3904 | mov eax, [edi+20-2] |
||
3905 | mov ax, [edi+26] |
||
3906 | push 0 |
||
3907 | push eax |
||
3908 | push dword [edi+28] ; size |
||
3909 | push .DoRead |
||
3910 | call fs_execute |
||
3911 | add esp, 16 |
||
3912 | pop edi |
||
3913 | ret |
||
3914 | |||
3915 | .DoRead: |
||
3916 | ; read next block |
||
3917 | ; in: eax->parameters, edi->buffer |
||
3918 | ; out: eax = error code |
||
3919 | pushad |
||
3920 | cmp dword [eax], 0 ; file size |
||
3921 | jz .eof |
||
3922 | add eax, 4 |
||
3923 | call fat_get_sector |
||
3924 | mov ebx, edi |
||
3925 | call hd_read |
||
3926 | cmp [hd_error], 0 |
||
3927 | jnz .err |
||
3928 | mov eax, [esp+28] |
||
3929 | mov ecx, [eax] |
||
3930 | sub ecx, 512 |
||
3931 | jae @f |
||
3932 | lea edi, [edi+ecx+512] |
||
3933 | neg ecx |
||
3934 | push eax |
||
3935 | xor eax, eax |
||
3936 | rep stosb |
||
3937 | pop eax |
||
3938 | @@: |
||
3939 | mov [eax], ecx |
||
3940 | mov edx, [eax+8] |
||
3941 | inc edx |
||
3942 | cmp edx, [SECTORS_PER_CLUSTER] |
||
3943 | jb @f |
||
3944 | push eax |
||
3945 | mov eax, [eax+4] |
||
3946 | call get_FAT |
||
3947 | cmp [hd_error], 0 |
||
3948 | jnz .err |
||
3949 | mov ecx, eax |
||
3950 | pop eax |
||
3951 | mov [eax+4], ecx |
||
3952 | xor edx, edx |
||
3953 | @@: |
||
3954 | mov [eax+8], edx |
||
3955 | popad |
||
3956 | xor eax, eax |
||
3957 | ret |
||
3958 | .eof: |
||
3959 | popad |
||
3960 | mov eax, 6 |
||
3961 | ret |
||
3962 | .err: |
||
3963 | popad |
||
3964 | mov eax, 11 |
||
3965 | ret |
||
3966 | |||
74 | mario79 | 3967 | ; \end{diamond}>>=>=>>>>> |