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Rev | Author | Line No. | Line |
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2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2455 | mario79 | 3 | ;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;; FAT32.INC ;; |
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7 | ;; ;; |
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8 | ;; FAT16/32 functions for KolibriOS ;; |
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9 | ;; ;; |
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10 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
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11 | ;; ;; |
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12 | ;; See file COPYING for details ;; |
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13 | ;; 04.02.2007 LFN create folder - diamond ;; |
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14 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
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15 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
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16 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
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17 | ;; 23.06.2006 LFN start application - diamond ;; |
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18 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
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19 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
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20 | ;; 04.05.2006 LFN read folder - diamond ;; |
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21 | ;; 29.04.2006 Elimination of hangup after the ;; |
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22 | ;; expiration hd_wait_timeout - Mario79 ;; |
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23 | ;; 23.04.2006 LFN read file - diamond ;; |
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24 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
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25 | ;; to MBR, see file part_set.inc - Mario79 ;; |
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26 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
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27 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
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28 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
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29 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
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30 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
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31 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
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32 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
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33 | ;; 08.11.2004 rename - ATV ;; |
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34 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
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35 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
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36 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
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37 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
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38 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
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39 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
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40 | ;; 30.3.2004 Error parameters at function return - VT ;; |
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41 | ;; 01.5.2002 Bugfix in device write - VT ;; |
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42 | ;; 20.5.2002 Hd status check - VT ;; |
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43 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
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44 | ;; ;; |
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45 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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46 | |||
47 | $Revision: 3174 $ |
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48 | |||
49 | |||
50 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
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51 | |||
52 | PUSHAD_EAX equ [esp+28] |
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53 | PUSHAD_ECX equ [esp+24] |
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54 | PUSHAD_EDX equ [esp+20] |
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55 | PUSHAD_EBX equ [esp+16] |
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56 | PUSHAD_EBP equ [esp+8] |
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57 | PUSHAD_ESI equ [esp+4] |
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58 | PUSHAD_EDI equ [esp+0] |
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59 | |||
2643 | clevermous | 60 | ; Internal data for every FAT partition. |
61 | struct FAT |
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62 | p PARTITION ; must be the first item |
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63 | fs_type db ? |
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64 | fat16_root db 0 ; flag for fat16 rootdir |
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65 | fat_change db 0 ; 1=fat has changed |
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66 | db ? ; alignment |
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67 | Lock MUTEX ? ; currently operations with one partition |
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68 | ; can not be executed in parallel since the |
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69 | ; legacy code is not ready; this mutex guards |
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70 | ; all operations |
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71 | SECTORS_PER_FAT dd 0x1f3a |
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72 | NUMBER_OF_FATS dd 0x2 |
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73 | SECTORS_PER_CLUSTER dd 0x8 |
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74 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
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75 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
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76 | FAT_START dd 0 ; start of fat table |
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77 | ROOT_START dd 0 ; start of rootdir (only fat16) |
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78 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
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79 | DATA_START dd 0 ; start of data area (=first cluster 2) |
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80 | LAST_CLUSTER dd 0 ; last availabe cluster |
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81 | ADR_FSINFO dd 0 ; used only by fat32 |
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82 | |||
83 | fatRESERVED dd 0x0FFFFFF6 |
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84 | fatBAD dd 0x0FFFFFF7 |
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85 | fatEND dd 0x0FFFFFF8 |
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86 | fatMASK dd 0x0FFFFFFF |
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87 | |||
88 | fatStartScan dd 2 |
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89 | |||
90 | cluster_tmp dd 0 ; used by analyze_directory |
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91 | ; and analyze_directory_to_write |
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92 | |||
93 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
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94 | longname_sec2 dd 0 ; directory sectors for delete long filename |
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95 | |||
96 | fat_in_cache dd -1 |
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97 | |||
98 | fat_cache rb 512 |
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99 | buffer rb 512 |
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100 | fsinfo_buffer rb 512 |
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101 | ends |
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102 | |||
2288 | clevermous | 103 | uglobal |
104 | align 4 |
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105 | partition_count dd 0 ; partitions found by set_FAT32_variables |
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106 | |||
107 | hd_error dd 0 ; set by wait_for_sector_buffer |
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108 | hd_setup dd 0 |
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109 | hd_wait_timeout dd 0 |
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110 | |||
111 | cache_search_start dd 0 ; used by find_empty_slot |
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112 | endg |
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113 | |||
114 | uglobal |
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115 | align 4 |
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116 | Sector512: ; label for dev_hdcd.inc |
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117 | buffer: |
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2643 | clevermous | 118 | times 512 db 0 |
2288 | clevermous | 119 | endg |
120 | |||
2643 | clevermous | 121 | iglobal |
122 | align 4 |
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123 | fat_user_functions: |
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124 | dd (fat_user_functions_end - fat_user_functions - 4) / 4 |
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125 | dd fat_Read |
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126 | dd fat_ReadFolder |
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127 | dd fat_Rewrite |
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128 | dd fat_Write |
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129 | dd fat_SetFileEnd |
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130 | dd fat_GetFileInfo |
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131 | dd fat_SetFileInfo |
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132 | dd 0 |
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133 | dd fat_Delete |
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134 | dd fat_CreateFolder |
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135 | fat_user_functions_end: |
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2288 | clevermous | 136 | endg |
137 | |||
2643 | clevermous | 138 | ; these labels are located before the main function to make |
139 | ; most of jumps to these be short |
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140 | fat_create_partition.free_return0: |
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141 | push ebx |
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142 | mov eax, ebp |
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143 | call free |
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144 | pop ebx |
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145 | pop ebp |
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146 | fat_create_partition.return0: |
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147 | xor eax, eax |
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148 | ret |
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149 | fat_create_partition: |
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150 | ; bootsector must have been successfully read |
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151 | cmp dword [esp+4], 1 |
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152 | jnz .return0 |
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153 | ; bootsector signature must be correct |
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154 | cmp word [ebx+0x1fe], 0xaa55 |
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155 | jnz .return0 |
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156 | ; sectors per cluster must be nonzero |
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157 | cmp byte [ebx+0xd], 0 |
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158 | jz .return0 |
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159 | ; bytes per sector must be 0x200 |
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160 | cmp word [ebx+0xb], 0x200 |
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161 | jnz .return0 |
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162 | ; number of fats must be nonzero |
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163 | cmp byte [ebx+0x10], 0 |
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164 | jz .return0 |
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165 | ; The only reason to be invalid partition now is FAT12. Since the test for |
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166 | ; FAT size requires knowledge of some calculated values, which are also used |
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167 | ; in the normal operation, let's hope for the best and allocate data now; if |
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168 | ; it will prove wrong, just deallocate it. |
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169 | push ebx |
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170 | push sizeof.FAT |
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171 | pop eax |
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172 | call malloc |
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173 | pop ebx |
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174 | test eax, eax |
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175 | jz .return0 |
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176 | mov ecx, [ebp+8] |
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177 | mov dword [eax+FAT.p.FirstSector], ecx |
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178 | mov ecx, [ebp+12] |
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179 | mov dword [eax+FAT.p.FirstSector+4], ecx |
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180 | mov ecx, [ebp+16] |
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181 | mov dword [eax+FAT.p.Length], ecx |
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182 | mov ecx, [ebp+20] |
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183 | mov dword [eax+FAT.p.Length+4], ecx |
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184 | mov [eax+FAT.p.Disk], esi |
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185 | mov [eax+FAT.p.FSUserFunctions], fat_user_functions |
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186 | or [eax+FAT.fat_in_cache], -1 |
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187 | mov [eax+FAT.fat_change], 0 |
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188 | push ebp |
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189 | mov ebp, eax |
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2288 | clevermous | 190 | |
2643 | clevermous | 191 | lea ecx, [ebp+FAT.Lock] |
192 | call mutex_init |
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2288 | clevermous | 193 | |
2643 | clevermous | 194 | movzx eax, word [ebx+0xe] ; sectors reserved |
195 | mov [ebp+FAT.FAT_START], eax |
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2288 | clevermous | 196 | |
2643 | clevermous | 197 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
198 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
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2288 | clevermous | 199 | |
2643 | clevermous | 200 | movzx ecx, word [ebx+0xb] ; bytes per sector |
201 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
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2288 | clevermous | 202 | |
2643 | clevermous | 203 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
204 | shl eax, 5 ; mul 32 |
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205 | dec ecx |
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206 | add eax, ecx ; round up if not equal count |
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207 | inc ecx ; bytes per sector |
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208 | xor edx, edx |
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209 | div ecx |
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210 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
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2288 | clevermous | 211 | |
2643 | clevermous | 212 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
213 | test eax, eax |
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214 | jnz @f |
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215 | mov eax, [ebx+0x24] ; sectors per fat |
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2288 | clevermous | 216 | @@: |
2643 | clevermous | 217 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
218 | |||
219 | movzx eax, byte [ebx+0x10] ; number of fats |
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220 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
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221 | imul eax, [ebp+FAT.SECTORS_PER_FAT] |
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222 | add eax, [ebp+FAT.FAT_START] |
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223 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
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224 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
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225 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
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226 | |||
227 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
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228 | test eax, eax |
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229 | jnz @f |
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230 | mov eax, [ebx+0x20] ; total sector count |
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231 | @@: |
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232 | mov dword [ebp+FAT.p.Length], eax |
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233 | and dword [ebp+FAT.p.Length+4], 0 |
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234 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
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235 | xor edx, edx |
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236 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
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237 | inc eax |
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238 | mov [ebp+FAT.LAST_CLUSTER], eax |
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239 | dec eax ; cluster count |
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240 | mov [ebp+FAT.fatStartScan], 2 |
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241 | |||
242 | ; limits by Microsoft Hardware White Paper v1.03 |
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243 | cmp eax, 4085 ; 0xff5 |
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244 | jb .free_return0 ; fat12 not supported |
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245 | cmp eax, 65525 ; 0xfff5 |
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246 | jb .fat16 |
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247 | .fat32: |
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248 | mov eax, [ebx+0x2c] ; rootdir cluster |
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249 | mov [ebp+FAT.ROOT_CLUSTER], eax |
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250 | movzx eax, word [ebx+0x30] |
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251 | mov [ebp+FAT.ADR_FSINFO], eax |
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252 | push ebx |
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253 | add ebx, 512 |
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254 | call fs_read32_sys |
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255 | test eax, eax |
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256 | jnz @f |
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257 | mov eax, [ebx+0x1ec] |
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258 | cmp eax, -1 |
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2288 | clevermous | 259 | jz @f |
2643 | clevermous | 260 | mov [ebp+FAT.fatStartScan], eax |
2288 | clevermous | 261 | @@: |
2643 | clevermous | 262 | pop ebx |
263 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
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264 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
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265 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
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266 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
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267 | mov al, 32 |
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268 | mov [fs_type], al |
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269 | mov [ebp+FAT.fs_type], al |
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270 | mov eax, ebp |
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271 | pop ebp |
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2288 | clevermous | 272 | ret |
2643 | clevermous | 273 | .fat16: |
274 | and [ebp+FAT.ROOT_CLUSTER], 0 |
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275 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
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276 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
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277 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
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278 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
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279 | mov al, 16 |
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280 | mov [fs_type], al |
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281 | mov [ebp+FAT.fs_type], al |
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282 | mov eax, ebp |
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283 | pop ebp |
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2288 | clevermous | 284 | ret |
285 | |||
286 | set_FAT: |
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287 | ;-------------------------------- |
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288 | ; input : EAX = cluster |
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289 | ; EDX = value to save |
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2643 | clevermous | 290 | ; EBP = pointer to FAT structure |
2288 | clevermous | 291 | ; output : EDX = old value |
292 | ;-------------------------------- |
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2643 | clevermous | 293 | ; out: CF set <=> error |
2288 | clevermous | 294 | push eax ebx esi |
295 | |||
296 | cmp eax, 2 |
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297 | jb sfc_error |
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2643 | clevermous | 298 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
2288 | clevermous | 299 | ja sfc_error |
2643 | clevermous | 300 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 301 | je sfc_1 |
302 | add eax, eax |
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303 | sfc_1: |
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304 | add eax, eax |
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305 | mov esi, 511 |
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306 | and esi, eax ; esi = position in fat sector |
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307 | shr eax, 9 ; eax = fat sector |
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2643 | clevermous | 308 | add eax, [ebp+FAT.FAT_START] |
309 | lea ebx, [ebp+FAT.fat_cache] |
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2288 | clevermous | 310 | |
2643 | clevermous | 311 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
2288 | clevermous | 312 | je sfc_in_cache ; yes |
313 | |||
2643 | clevermous | 314 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
2288 | clevermous | 315 | je sfc_no_change ; no |
316 | call write_fat_sector; yes. write it into disk |
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2643 | clevermous | 317 | jc sfc_error |
2288 | clevermous | 318 | |
319 | sfc_no_change: |
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2643 | clevermous | 320 | mov [ebp+FAT.fat_in_cache], eax; save fat sector |
321 | call fs_read32_sys |
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322 | test eax, eax |
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2288 | clevermous | 323 | jne sfc_error |
324 | |||
325 | |||
326 | sfc_in_cache: |
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2643 | clevermous | 327 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 328 | jne sfc_test32 |
329 | |||
330 | sfc_set16: |
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331 | xchg [ebx+esi], dx ; save new value and get old value |
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332 | jmp sfc_write |
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333 | |||
334 | sfc_test32: |
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2643 | clevermous | 335 | mov eax, [ebp+FAT.fatMASK] |
2288 | clevermous | 336 | |
337 | sfc_set32: |
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338 | and edx, eax |
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339 | xor eax, -1 ; mask for high bits |
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340 | and eax, [ebx+esi] ; get high 4 bits |
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341 | or eax, edx |
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342 | mov edx, [ebx+esi] ; get old value |
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343 | mov [ebx+esi], eax ; save new value |
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344 | |||
345 | sfc_write: |
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2643 | clevermous | 346 | mov [ebp+FAT.fat_change], 1; fat has changed |
2288 | clevermous | 347 | |
348 | sfc_nonzero: |
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2643 | clevermous | 349 | and edx, [ebp+FAT.fatMASK] |
2288 | clevermous | 350 | |
2643 | clevermous | 351 | sfc_return: |
2288 | clevermous | 352 | pop esi ebx eax |
353 | ret |
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2643 | clevermous | 354 | sfc_error: |
355 | stc |
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356 | jmp sfc_return |
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2288 | clevermous | 357 | |
358 | |||
359 | get_FAT: |
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360 | ;-------------------------------- |
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361 | ; input : EAX = cluster |
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2643 | clevermous | 362 | ; EBP = pointer to FAT structure |
2288 | clevermous | 363 | ; output : EAX = next cluster |
364 | ;-------------------------------- |
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2643 | clevermous | 365 | ; out: CF set <=> error |
2288 | clevermous | 366 | push ebx esi |
367 | |||
2643 | clevermous | 368 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 369 | je gfc_1 |
370 | add eax, eax |
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371 | gfc_1: |
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372 | add eax, eax |
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373 | mov esi, 511 |
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374 | and esi, eax ; esi = position in fat sector |
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375 | shr eax, 9 ; eax = fat sector |
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2643 | clevermous | 376 | add eax, [ebp+FAT.FAT_START] |
377 | lea ebx, [ebp+FAT.fat_cache] |
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2288 | clevermous | 378 | |
2643 | clevermous | 379 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
2288 | clevermous | 380 | je gfc_in_cache |
381 | |||
2643 | clevermous | 382 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
2288 | clevermous | 383 | je gfc_no_change ; no |
384 | call write_fat_sector; yes. write it into disk |
||
2643 | clevermous | 385 | jc hd_error_01 |
2288 | clevermous | 386 | |
387 | gfc_no_change: |
||
2643 | clevermous | 388 | mov [ebp+FAT.fat_in_cache], eax |
389 | call fs_read32_sys |
||
390 | test eax, eax |
||
2288 | clevermous | 391 | jne hd_error_01 |
392 | |||
393 | gfc_in_cache: |
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394 | mov eax, [ebx+esi] |
||
2643 | clevermous | 395 | and eax, [ebp+FAT.fatMASK] |
396 | gfc_return: |
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2288 | clevermous | 397 | pop esi ebx |
398 | ret |
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2643 | clevermous | 399 | hd_error_01: |
400 | stc |
||
401 | jmp gfc_return |
||
2288 | clevermous | 402 | |
403 | |||
404 | get_free_FAT: |
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405 | ;----------------------------------------------------------- |
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406 | ; output : if CARRY=0 EAX = # first cluster found free |
||
407 | ; if CARRY=1 disk full |
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408 | ; Note : for more speed need to use fat_cache directly |
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409 | ;----------------------------------------------------------- |
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410 | push ecx |
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2643 | clevermous | 411 | mov ecx, [ebp+FAT.LAST_CLUSTER]; counter for full disk |
2288 | clevermous | 412 | sub ecx, 2 |
2643 | clevermous | 413 | mov eax, [ebp+FAT.fatStartScan] |
2288 | clevermous | 414 | cmp eax, 2 |
415 | jb gff_reset |
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416 | |||
417 | gff_test: |
||
2643 | clevermous | 418 | cmp eax, [ebp+FAT.LAST_CLUSTER]; if above last cluster start at cluster 2 |
2288 | clevermous | 419 | jbe gff_in_range |
420 | gff_reset: |
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421 | mov eax, 2 |
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422 | |||
423 | gff_in_range: |
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424 | push eax |
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425 | call get_FAT ; get cluster state |
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2643 | clevermous | 426 | jc gff_not_found_1 |
2288 | clevermous | 427 | |
428 | test eax, eax ; is it free? |
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429 | pop eax |
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430 | je gff_found ; yes |
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431 | inc eax ; next cluster |
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432 | dec ecx ; is all checked? |
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433 | jns gff_test ; no |
||
434 | |||
435 | gff_not_found: |
||
436 | pop ecx ; yes. disk is full |
||
437 | stc |
||
438 | ret |
||
439 | |||
2643 | clevermous | 440 | gff_not_found_1: |
441 | pop eax |
||
442 | jmp gff_not_found |
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443 | |||
2288 | clevermous | 444 | gff_found: |
445 | lea ecx, [eax+1] |
||
2643 | clevermous | 446 | mov [ebp+FAT.fatStartScan], ecx |
2288 | clevermous | 447 | pop ecx |
448 | clc |
||
449 | ret |
||
450 | |||
451 | |||
452 | write_fat_sector: |
||
453 | ;----------------------------------------------------------- |
||
454 | ; write changed fat to disk |
||
455 | ;----------------------------------------------------------- |
||
456 | push eax ebx ecx |
||
457 | |||
2643 | clevermous | 458 | mov [ebp+FAT.fat_change], 0 |
459 | mov eax, [ebp+FAT.fat_in_cache] |
||
2288 | clevermous | 460 | cmp eax, -1 |
461 | jz write_fat_not_used |
||
2643 | clevermous | 462 | lea ebx, [ebp+FAT.fat_cache] |
463 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
||
2288 | clevermous | 464 | |
465 | write_next_fat: |
||
2643 | clevermous | 466 | push eax |
467 | call fs_write32_sys |
||
468 | test eax, eax |
||
469 | pop eax |
||
470 | jnz write_fat_not_used |
||
2288 | clevermous | 471 | |
2643 | clevermous | 472 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
2288 | clevermous | 473 | dec ecx |
474 | jnz write_next_fat |
||
475 | |||
476 | write_fat_not_used: |
||
477 | pop ecx ebx eax |
||
478 | ret |
||
479 | |||
480 | |||
481 | |||
482 | |||
483 | |||
484 | bcd2bin: |
||
485 | ;---------------------------------- |
||
486 | ; input : AL=BCD number (eg. 0x11) |
||
487 | ; output : AH=0 |
||
488 | ; AL=decimal number (eg. 11) |
||
489 | ;---------------------------------- |
||
490 | xor ah, ah |
||
491 | shl ax, 4 |
||
492 | shr al, 4 |
||
493 | aad |
||
494 | ret |
||
495 | |||
496 | |||
497 | get_date_for_file: |
||
498 | ;----------------------------------------------------- |
||
499 | ; Get date from CMOS and pack day,month,year in AX |
||
500 | ; DATE bits 0..4 : day of month 0..31 |
||
501 | ; 5..8 : month of year 1..12 |
||
502 | ; 9..15 : count of years from 1980 |
||
503 | ;----------------------------------------------------- |
||
504 | mov al, 0x7 ;day |
||
505 | out 0x70, al |
||
506 | in al, 0x71 |
||
507 | call bcd2bin |
||
508 | ror eax, 5 |
||
509 | |||
510 | mov al, 0x8 ;month |
||
511 | out 0x70, al |
||
512 | in al, 0x71 |
||
513 | call bcd2bin |
||
514 | ror eax, 4 |
||
515 | |||
516 | mov al, 0x9 ;year |
||
517 | out 0x70, al |
||
518 | in al, 0x71 |
||
519 | call bcd2bin |
||
520 | add ax, 20 ;because CMOS return only the two last |
||
521 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
522 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
||
523 | ret |
||
524 | |||
525 | |||
526 | get_time_for_file: |
||
527 | ;----------------------------------------------------- |
||
528 | ; Get time from CMOS and pack hour,minute,second in AX |
||
529 | ; TIME bits 0..4 : second (the low bit is lost) |
||
530 | ; 5..10 : minute 0..59 |
||
531 | ; 11..15 : hour 0..23 |
||
532 | ;----------------------------------------------------- |
||
533 | mov al, 0x0 ;second |
||
534 | out 0x70, al |
||
535 | in al, 0x71 |
||
536 | call bcd2bin |
||
537 | ror eax, 6 |
||
538 | |||
539 | mov al, 0x2 ;minute |
||
540 | out 0x70, al |
||
541 | in al, 0x71 |
||
542 | call bcd2bin |
||
543 | ror eax, 6 |
||
544 | |||
545 | mov al, 0x4 ;hour |
||
546 | out 0x70, al |
||
547 | in al, 0x71 |
||
548 | call bcd2bin |
||
549 | rol eax, 11 |
||
550 | ret |
||
551 | |||
552 | |||
553 | set_current_time_for_entry: |
||
554 | ;----------------------------------------------------- |
||
555 | ; Set current time/date for file entry |
||
556 | ; input : ebx = file entry pointer |
||
557 | ;----------------------------------------------------- |
||
558 | push eax |
||
559 | call get_time_for_file; update files date/time |
||
560 | mov [ebx+22], ax |
||
561 | call get_date_for_file |
||
562 | mov [ebx+24], ax |
||
563 | pop eax |
||
564 | ret |
||
565 | |||
566 | |||
567 | |||
568 | add_disk_free_space: |
||
569 | ;----------------------------------------------------- |
||
570 | ; input : ecx = cluster count |
||
571 | ; Note : negative = remove clusters from free space |
||
572 | ; positive = add clusters to free space |
||
573 | ;----------------------------------------------------- |
||
574 | test ecx, ecx ; no change |
||
575 | je add_dfs_no |
||
2643 | clevermous | 576 | cmp [ebp+FAT.fs_type], 32 ; free disk space only used by fat32 |
2288 | clevermous | 577 | jne add_dfs_no |
578 | |||
579 | push eax ebx |
||
2643 | clevermous | 580 | mov eax, [ebp+FAT.ADR_FSINFO] |
581 | lea ebx, [ebp+FAT.fsinfo_buffer] |
||
582 | call fs_read32_sys |
||
583 | test eax, eax |
||
584 | jnz add_not_fs |
||
2288 | clevermous | 585 | |
586 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
||
587 | jne add_not_fs |
||
588 | |||
589 | add [ebx+0x1e8], ecx |
||
2643 | clevermous | 590 | push [ebp+FAT.fatStartScan] |
2288 | clevermous | 591 | pop dword [ebx+0x1ec] |
2643 | clevermous | 592 | mov eax, [ebp+FAT.ADR_FSINFO] |
593 | call fs_write32_sys |
||
594 | ; jc add_not_fs |
||
2288 | clevermous | 595 | |
596 | add_not_fs: |
||
597 | pop ebx eax |
||
598 | |||
599 | add_dfs_no: |
||
600 | ret |
||
601 | |||
602 | |||
603 | |||
604 | clear_cluster_chain: |
||
605 | ;----------------------------------------------------- |
||
606 | ; input : eax = first cluster |
||
607 | ;----------------------------------------------------- |
||
608 | push eax ecx edx |
||
609 | xor ecx, ecx ; cluster count |
||
610 | |||
611 | clean_new_chain: |
||
2643 | clevermous | 612 | cmp eax, [ebp+FAT.LAST_CLUSTER]; end of file |
2288 | clevermous | 613 | ja delete_OK |
614 | cmp eax, 2 ; unfinished fat chain or zero length file |
||
615 | jb delete_OK |
||
2643 | clevermous | 616 | cmp eax, [ebp+FAT.ROOT_CLUSTER]; don't remove root cluster |
2288 | clevermous | 617 | jz delete_OK |
618 | |||
619 | xor edx, edx |
||
620 | call set_FAT ; clear fat entry |
||
2643 | clevermous | 621 | jc access_denied_01 |
2288 | clevermous | 622 | |
623 | inc ecx ; update cluster count |
||
624 | mov eax, edx ; old cluster |
||
625 | jmp clean_new_chain |
||
626 | |||
627 | delete_OK: |
||
628 | call add_disk_free_space; add clusters to free disk space |
||
2643 | clevermous | 629 | clc |
2288 | clevermous | 630 | access_denied_01: |
631 | pop edx ecx eax |
||
632 | ret |
||
633 | |||
634 | |||
2643 | clevermous | 635 | if 0 |
2288 | clevermous | 636 | get_hd_info: |
637 | ;----------------------------------------------------------- |
||
638 | ; output : eax = 0 - ok |
||
639 | ; 3 - unknown FS |
||
640 | ; 10 - access denied |
||
641 | ; edx = cluster size in bytes |
||
642 | ; ebx = total clusters on disk |
||
643 | ; ecx = free clusters on disk |
||
644 | ;----------------------------------------------------------- |
||
2643 | clevermous | 645 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 646 | jz info_fat_ok |
2643 | clevermous | 647 | cmp [ebp+FAT.fs_type], 32 |
2288 | clevermous | 648 | jz info_fat_ok |
649 | xor edx, edx |
||
650 | xor ebx, ebx |
||
651 | xor ecx, ecx |
||
652 | mov eax, ERROR_UNKNOWN_FS |
||
653 | ret |
||
654 | |||
655 | info_fat_ok: |
||
656 | ; call reserve_hd1 |
||
657 | |||
658 | xor ecx, ecx ; count of free clusters |
||
659 | mov eax, 2 |
||
2643 | clevermous | 660 | mov ebx, [ebp+FAT.LAST_CLUSTER] |
2288 | clevermous | 661 | |
662 | info_cluster: |
||
663 | push eax |
||
664 | call get_FAT ; get cluster info |
||
2643 | clevermous | 665 | jc info_access_denied |
2288 | clevermous | 666 | |
667 | test eax, eax ; is it free? |
||
668 | jnz info_used ; no |
||
669 | inc ecx |
||
670 | |||
671 | info_used: |
||
672 | pop eax |
||
673 | inc eax |
||
674 | cmp eax, ebx ; is above last cluster? |
||
675 | jbe info_cluster ; no. test next cluster |
||
676 | |||
677 | dec ebx ; cluster count |
||
2643 | clevermous | 678 | imul edx, [ebp+FAT.SECTORS_PER_CLUSTER], 512; cluster size in bytes |
2288 | clevermous | 679 | xor eax, eax |
680 | ret |
||
681 | |||
682 | info_access_denied: |
||
683 | add esp, 4 |
||
684 | xor edx, edx |
||
685 | xor ebx, ebx |
||
686 | xor ecx, ecx |
||
687 | mov eax, ERROR_ACCESS_DENIED |
||
688 | ret |
||
2643 | clevermous | 689 | end if |
2288 | clevermous | 690 | |
691 | update_disk: |
||
692 | ;----------------------------------------------------------- |
||
693 | ; write changed fat and cache to disk |
||
694 | ;----------------------------------------------------------- |
||
2643 | clevermous | 695 | cmp [ebp+FAT.fat_change], 0 ; is fat changed? |
2288 | clevermous | 696 | je upd_no_change |
697 | |||
698 | call write_fat_sector |
||
2643 | clevermous | 699 | jc update_disk_acces_denied |
2288 | clevermous | 700 | |
701 | upd_no_change: |
||
702 | |||
2643 | clevermous | 703 | push esi |
704 | mov esi, [ebp+PARTITION.Disk] |
||
705 | call disk_sync |
||
706 | pop esi |
||
2288 | clevermous | 707 | update_disk_acces_denied: |
708 | ret |
||
709 | |||
2643 | clevermous | 710 | fat_lock: |
711 | lea ecx, [ebp+FAT.Lock] |
||
712 | jmp mutex_lock |
||
713 | fat_unlock: |
||
714 | lea ecx, [ebp+FAT.Lock] |
||
715 | jmp mutex_unlock |
||
2288 | clevermous | 716 | |
717 | ; \begin{diamond} |
||
718 | hd_find_lfn: |
||
2643 | clevermous | 719 | ; in: ebp -> FAT structure |
720 | ; in: esi+[esp+4] -> name |
||
721 | ; out: CF=1 - file not found, eax=error code |
||
2288 | clevermous | 722 | ; else CF=0 and edi->direntry, eax=sector |
723 | ; destroys eax |
||
724 | push esi edi |
||
725 | push 0 |
||
726 | push 0 |
||
727 | push fat16_root_first |
||
728 | push fat16_root_next |
||
2643 | clevermous | 729 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
730 | cmp [ebp+FAT.fs_type], 32 |
||
2288 | clevermous | 731 | jz .fat32 |
732 | .loop: |
||
733 | call fat_find_lfn |
||
734 | jc .notfound |
||
735 | cmp byte [esi], 0 |
||
736 | jz .found |
||
737 | .continue: |
||
738 | test byte [edi+11], 10h |
||
739 | jz .notfound |
||
740 | and dword [esp+12], 0 |
||
741 | mov eax, [edi+20-2] |
||
742 | mov ax, [edi+26] ; cluster |
||
743 | .fat32: |
||
744 | mov [esp+8], eax |
||
745 | mov dword [esp+4], fat_notroot_first |
||
746 | mov dword [esp], fat_notroot_next |
||
747 | jmp .loop |
||
748 | .notfound: |
||
749 | add esp, 16 |
||
750 | pop edi esi |
||
751 | stc |
||
2643 | clevermous | 752 | ret 4 |
2288 | clevermous | 753 | .found: |
2643 | clevermous | 754 | lea eax, [esp+4+24] |
755 | cmp dword [eax], 0 |
||
2288 | clevermous | 756 | jz @f |
2643 | clevermous | 757 | mov esi, [eax] |
758 | and dword [eax], 0 |
||
2288 | clevermous | 759 | jmp .continue |
760 | @@: |
||
761 | lea eax, [esp+8] |
||
762 | cmp dword [eax], 0 |
||
763 | jz .root |
||
764 | call fat_get_sector |
||
765 | jmp .cmn |
||
766 | .root: |
||
767 | mov eax, [eax+4] |
||
2643 | clevermous | 768 | add eax, [ebp+FAT.ROOT_START] |
2288 | clevermous | 769 | .cmn: |
770 | add esp, 20 ; CF=0 |
||
771 | pop esi |
||
2643 | clevermous | 772 | ret 4 |
2288 | clevermous | 773 | |
774 | ;---------------------------------------------------------------- |
||
775 | ; |
||
776 | ; fs_HdRead - LFN variant for reading hard disk |
||
777 | ; |
||
2643 | clevermous | 778 | ; Obsolete, will be replaced with filesystem-specific functions. |
779 | ; |
||
2288 | clevermous | 780 | ; esi points to filename |
781 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
782 | ; may be ebx=0 - start from first byte |
||
783 | ; ecx number of bytes to read, 0+ |
||
784 | ; edx mem location to return data |
||
785 | ; |
||
786 | ; ret ebx = bytes read or 0xffffffff file not found |
||
787 | ; eax = 0 ok read or other = errormsg |
||
788 | ; |
||
789 | ;-------------------------------------------------------------- |
||
790 | fs_HdRead: |
||
791 | cmp [fs_type], 16 |
||
792 | jz @f |
||
793 | cmp [fs_type], 32 |
||
794 | jz @f |
||
795 | cmp [fs_type], 1 |
||
796 | jz ntfs_HdRead |
||
797 | cmp [fs_type], 2 |
||
798 | jz ext2_HdRead |
||
799 | or ebx, -1 |
||
800 | mov eax, ERROR_UNKNOWN_FS |
||
801 | ret |
||
802 | @@: |
||
2643 | clevermous | 803 | sub ebx, 4 |
804 | push ebp |
||
805 | mov ebp, [fs_dependent_data_start.partition] |
||
806 | call fat_Read |
||
807 | pop ebp |
||
808 | ret |
||
809 | |||
810 | ;---------------------------------------------------------------- |
||
811 | ; fat_Read - FAT16/32 implementation of reading a file |
||
812 | ; in: ebp = pointer to FAT structure |
||
813 | ; in: esi+[esp+4] = name |
||
814 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
815 | ; out: eax, ebx = return values for sysfunc 70 |
||
816 | ;---------------------------------------------------------------- |
||
817 | fat_Read: |
||
818 | call fat_lock |
||
2288 | clevermous | 819 | push edi |
820 | cmp byte [esi], 0 |
||
821 | jnz @f |
||
822 | .noaccess: |
||
823 | pop edi |
||
824 | .noaccess_2: |
||
2643 | clevermous | 825 | call fat_unlock |
2288 | clevermous | 826 | or ebx, -1 |
827 | mov eax, ERROR_ACCESS_DENIED |
||
828 | ret |
||
829 | |||
830 | @@: |
||
2643 | clevermous | 831 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 832 | jnc .found |
833 | pop edi |
||
2643 | clevermous | 834 | push eax |
835 | call fat_unlock |
||
836 | pop eax |
||
2288 | clevermous | 837 | or ebx, -1 |
838 | ret |
||
839 | |||
840 | .found: |
||
841 | test byte [edi+11], 0x10; do not allow read directories |
||
842 | jnz .noaccess |
||
2643 | clevermous | 843 | cmp dword [ebx+8], 0 |
2288 | clevermous | 844 | jz @f |
845 | xor ebx, ebx |
||
846 | .reteof: |
||
2643 | clevermous | 847 | call fat_unlock |
848 | mov eax, ERROR_END_OF_FILE |
||
2288 | clevermous | 849 | pop edi |
850 | ret |
||
851 | @@: |
||
2643 | clevermous | 852 | mov ecx, [ebx+12] ; size |
853 | mov edx, [ebx+16] ; pointer |
||
854 | mov ebx, [ebx+4] ; file offset |
||
855 | push edx |
||
2288 | clevermous | 856 | push 0 |
857 | mov eax, [edi+28] |
||
858 | sub eax, ebx |
||
859 | jb .eof |
||
860 | cmp eax, ecx |
||
861 | jae @f |
||
862 | mov ecx, eax |
||
863 | mov byte [esp], 6 |
||
864 | @@: |
||
865 | mov eax, [edi+20-2] |
||
866 | mov ax, [edi+26] |
||
867 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
||
868 | .new_cluster: |
||
869 | jecxz .new_sector |
||
2643 | clevermous | 870 | cmp eax, 2 |
871 | jb .eof |
||
872 | cmp eax, [ebp+FAT.fatRESERVED] |
||
2288 | clevermous | 873 | jae .eof |
2643 | clevermous | 874 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 875 | dec eax |
876 | dec eax |
||
2643 | clevermous | 877 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 878 | imul eax, edi |
2643 | clevermous | 879 | add eax, [ebp+FAT.DATA_START] |
2288 | clevermous | 880 | .new_sector: |
881 | test ecx, ecx |
||
882 | jz .done |
||
883 | sub ebx, 512 |
||
884 | jae .skip |
||
885 | add ebx, 512 |
||
886 | jnz .force_buf |
||
887 | cmp ecx, 512 |
||
888 | jb .force_buf |
||
889 | ; we may read directly to given buffer |
||
2643 | clevermous | 890 | push eax ebx |
2288 | clevermous | 891 | mov ebx, edx |
2643 | clevermous | 892 | call fs_read32_app |
893 | test eax, eax |
||
894 | pop ebx eax |
||
2288 | clevermous | 895 | jne .noaccess_1 |
896 | add edx, 512 |
||
897 | sub ecx, 512 |
||
898 | jmp .skip |
||
899 | .force_buf: |
||
900 | ; we must read sector to temporary buffer and then copy it to destination |
||
901 | push eax ebx |
||
2643 | clevermous | 902 | lea ebx, [ebp+FAT.buffer] |
903 | call fs_read32_app |
||
904 | test eax, eax |
||
2288 | clevermous | 905 | mov eax, ebx |
906 | pop ebx |
||
907 | jne .noaccess_3 |
||
908 | add eax, ebx |
||
909 | push ecx |
||
910 | add ecx, ebx |
||
911 | cmp ecx, 512 |
||
912 | jbe @f |
||
913 | mov ecx, 512 |
||
914 | @@: |
||
915 | sub ecx, ebx |
||
916 | mov ebx, edx |
||
917 | call memmove |
||
918 | add edx, ecx |
||
919 | sub [esp], ecx |
||
920 | pop ecx |
||
921 | pop eax |
||
922 | xor ebx, ebx |
||
923 | .skip: |
||
924 | inc eax |
||
925 | dec edi |
||
926 | jnz .new_sector |
||
2643 | clevermous | 927 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 928 | call get_FAT |
2643 | clevermous | 929 | jc .noaccess_1 |
2288 | clevermous | 930 | |
931 | jmp .new_cluster |
||
932 | .noaccess_3: |
||
933 | pop eax |
||
934 | .noaccess_1: |
||
935 | pop eax |
||
2643 | clevermous | 936 | push ERROR_DEVICE |
2288 | clevermous | 937 | .done: |
938 | mov ebx, edx |
||
2643 | clevermous | 939 | call fat_unlock |
940 | pop eax edx edi |
||
2288 | clevermous | 941 | sub ebx, edx |
942 | ret |
||
943 | .eof: |
||
944 | mov ebx, edx |
||
2643 | clevermous | 945 | pop eax edx |
2288 | clevermous | 946 | sub ebx, edx |
947 | jmp .reteof |
||
948 | |||
949 | ;---------------------------------------------------------------- |
||
950 | ; |
||
951 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
952 | ; |
||
2643 | clevermous | 953 | ; Obsolete, will be replaced with filesystem-specific functions. |
954 | ; |
||
2288 | clevermous | 955 | ; esi points to filename |
956 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
||
957 | ; & flags (bitfields) |
||
958 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
959 | ; ecx number of blocks to read, 0+ |
||
960 | ; edx mem location to return data |
||
961 | ; |
||
962 | ; ret ebx = blocks read or 0xffffffff folder not found |
||
963 | ; eax = 0 ok read or other = errormsg |
||
964 | ; |
||
965 | ;-------------------------------------------------------------- |
||
966 | fs_HdReadFolder: |
||
2643 | clevermous | 967 | cmp [fs_type], 16 |
968 | jz @f |
||
969 | cmp [fs_type], 32 |
||
970 | jz @f |
||
2288 | clevermous | 971 | cmp [fs_type], 1 |
972 | jz ntfs_HdReadFolder |
||
973 | cmp [fs_type], 2 |
||
974 | jz ext2_HdReadFolder |
||
975 | push ERROR_UNSUPPORTED_FS |
||
976 | pop eax |
||
977 | or ebx, -1 |
||
978 | ret |
||
979 | @@: |
||
2643 | clevermous | 980 | sub ebx, 4 |
981 | push ebp |
||
982 | mov ebp, [fs_dependent_data_start.partition] |
||
983 | call fat_ReadFolder |
||
984 | pop ebp |
||
985 | ret |
||
986 | |||
987 | ;---------------------------------------------------------------- |
||
988 | ; fat_ReadFolder - FAT16/32 implementation of reading a folder |
||
989 | ; in: ebp = pointer to FAT structure |
||
990 | ; in: esi+[esp+4] = name |
||
991 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
992 | ; out: eax, ebx = return values for sysfunc 70 |
||
993 | ;---------------------------------------------------------------- |
||
994 | fat_ReadFolder: |
||
995 | call fat_lock |
||
996 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
||
2288 | clevermous | 997 | push edi |
998 | cmp byte [esi], 0 |
||
999 | jz .doit |
||
2643 | clevermous | 1000 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 1001 | jnc .found |
1002 | pop edi |
||
2643 | clevermous | 1003 | push eax |
1004 | call fat_unlock |
||
1005 | pop eax |
||
2288 | clevermous | 1006 | or ebx, -1 |
1007 | ret |
||
1008 | .found: |
||
1009 | test byte [edi+11], 0x10 ; do not allow read files |
||
1010 | jnz .found_dir |
||
1011 | pop edi |
||
2643 | clevermous | 1012 | call fat_unlock |
2288 | clevermous | 1013 | or ebx, -1 |
1014 | mov eax, ERROR_ACCESS_DENIED |
||
1015 | ret |
||
1016 | .found_dir: |
||
1017 | mov eax, [edi+20-2] |
||
1018 | mov ax, [edi+26] ; eax=cluster |
||
1019 | .doit: |
||
2643 | clevermous | 1020 | push esi |
2288 | clevermous | 1021 | sub esp, 262*2 ; reserve space for LFN |
2643 | clevermous | 1022 | push dword [ebx+8] ; for fat_get_name: read ANSI/UNICODE name |
1023 | mov edx, [ebx+16] ; pointer to buffer |
||
2288 | clevermous | 1024 | ; init header |
2643 | clevermous | 1025 | push eax |
2288 | clevermous | 1026 | mov edi, edx |
1027 | mov ecx, 32/4 |
||
1028 | xor eax, eax |
||
1029 | rep stosd |
||
2643 | clevermous | 1030 | pop eax |
2288 | clevermous | 1031 | mov byte [edx], 1 ; version |
1032 | mov esi, edi ; esi points to BDFE |
||
2643 | clevermous | 1033 | mov ecx, [ebx+12] ; number of blocks to read |
1034 | mov ebx, [ebx+4] ; index of the first block |
||
2288 | clevermous | 1035 | .new_cluster: |
2643 | clevermous | 1036 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 1037 | test eax, eax |
1038 | jnz @f |
||
2643 | clevermous | 1039 | cmp [ebp+FAT.fs_type], 32 |
2288 | clevermous | 1040 | jz .notfound |
2643 | clevermous | 1041 | mov eax, [ebp+FAT.ROOT_START] |
1042 | push [ebp+FAT.ROOT_SECTORS] |
||
2288 | clevermous | 1043 | push ebx |
1044 | jmp .new_sector |
||
1045 | @@: |
||
1046 | dec eax |
||
1047 | dec eax |
||
2643 | clevermous | 1048 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1049 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1050 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1051 | push ebx |
1052 | .new_sector: |
||
2643 | clevermous | 1053 | lea ebx, [ebp+FAT.buffer] |
2288 | clevermous | 1054 | mov edi, ebx |
2643 | clevermous | 1055 | push eax |
1056 | call fs_read32_sys |
||
1057 | test eax, eax |
||
1058 | pop eax |
||
2288 | clevermous | 1059 | jnz .notfound2 |
1060 | add ebx, 512 |
||
1061 | push eax |
||
1062 | .l1: |
||
2643 | clevermous | 1063 | push ebp |
1064 | lea ebp, [esp+20] |
||
2288 | clevermous | 1065 | call fat_get_name |
2643 | clevermous | 1066 | pop ebp |
2288 | clevermous | 1067 | jc .l2 |
1068 | cmp byte [edi+11], 0xF |
||
1069 | jnz .do_bdfe |
||
1070 | add edi, 0x20 |
||
1071 | cmp edi, ebx |
||
1072 | jb .do_bdfe |
||
1073 | pop eax |
||
1074 | inc eax |
||
1075 | dec dword [esp+4] |
||
1076 | jnz @f |
||
2643 | clevermous | 1077 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 1078 | test eax, eax |
1079 | jz .done |
||
1080 | call get_FAT |
||
2643 | clevermous | 1081 | jc .notfound2 |
2288 | clevermous | 1082 | cmp eax, 2 |
1083 | jb .done |
||
2643 | clevermous | 1084 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1085 | jae .done |
1086 | push eax |
||
2643 | clevermous | 1087 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1088 | mov [esp+8], eax |
1089 | pop eax |
||
2643 | clevermous | 1090 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 1091 | dec eax |
1092 | dec eax |
||
2643 | clevermous | 1093 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1094 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1095 | @@: |
2643 | clevermous | 1096 | lea ebx, [ebp+FAT.buffer] |
2288 | clevermous | 1097 | mov edi, ebx |
2643 | clevermous | 1098 | push eax |
1099 | call fs_read32_sys |
||
1100 | test eax, eax |
||
1101 | pop eax |
||
2288 | clevermous | 1102 | jnz .notfound2 |
1103 | add ebx, 512 |
||
1104 | push eax |
||
1105 | .do_bdfe: |
||
1106 | inc dword [edx+8] ; new file found |
||
1107 | dec dword [esp+4] |
||
1108 | jns .l2 |
||
1109 | dec ecx |
||
1110 | js .l2 |
||
1111 | inc dword [edx+4] ; new file block copied |
||
2643 | clevermous | 1112 | push ebp |
1113 | lea ebp, [esp+20] |
||
2288 | clevermous | 1114 | call fat_entry_to_bdfe |
2643 | clevermous | 1115 | pop ebp |
2288 | clevermous | 1116 | .l2: |
1117 | add edi, 0x20 |
||
1118 | cmp edi, ebx |
||
1119 | jb .l1 |
||
1120 | pop eax |
||
1121 | inc eax |
||
1122 | dec dword [esp+4] |
||
1123 | jnz .new_sector |
||
2643 | clevermous | 1124 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 1125 | test eax, eax |
1126 | jz .done |
||
1127 | call get_FAT |
||
2643 | clevermous | 1128 | jc .notfound2 |
2288 | clevermous | 1129 | cmp eax, 2 |
1130 | jb .done |
||
2643 | clevermous | 1131 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1132 | jae .done |
1133 | push eax |
||
2643 | clevermous | 1134 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1135 | mov [esp+8], eax |
1136 | pop eax |
||
1137 | pop ebx |
||
1138 | add esp, 4 |
||
1139 | jmp .new_cluster |
||
1140 | .notfound2: |
||
1141 | add esp, 8 |
||
1142 | .notfound: |
||
1143 | add esp, 262*2+4 |
||
2643 | clevermous | 1144 | pop esi edi |
1145 | mov ebx, [edx+4] |
||
1146 | call fat_unlock |
||
1147 | mov eax, ERROR_DEVICE |
||
2288 | clevermous | 1148 | ret |
1149 | .done: |
||
1150 | add esp, 262*2+4+8 |
||
1151 | mov ebx, [edx+4] |
||
1152 | xor eax, eax |
||
1153 | dec ecx |
||
1154 | js @f |
||
1155 | mov al, ERROR_END_OF_FILE |
||
1156 | @@: |
||
2643 | clevermous | 1157 | push eax |
1158 | call fat_unlock |
||
1159 | pop eax |
||
1160 | pop esi edi |
||
2288 | clevermous | 1161 | ret |
1162 | |||
1163 | fat16_root_next: |
||
2643 | clevermous | 1164 | push ecx |
1165 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
||
1166 | cmp edi, ecx |
||
2288 | clevermous | 1167 | jae fat16_root_next_sector |
2643 | clevermous | 1168 | pop ecx |
2288 | clevermous | 1169 | add edi, 0x20 |
1170 | ret ; CF=0 |
||
1171 | fat16_root_next_sector: |
||
1172 | ; read next sector |
||
2643 | clevermous | 1173 | push [ebp+FAT.longname_sec2] |
1174 | pop [ebp+FAT.longname_sec1] |
||
2288 | clevermous | 1175 | mov ecx, [eax+4] |
1176 | push ecx |
||
2643 | clevermous | 1177 | add ecx, [ebp+FAT.ROOT_START] |
1178 | mov [ebp+FAT.longname_sec2], ecx |
||
2288 | clevermous | 1179 | pop ecx |
1180 | inc ecx |
||
1181 | mov [eax+4], ecx |
||
2643 | clevermous | 1182 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
2288 | clevermous | 1183 | pop ecx |
2643 | clevermous | 1184 | jb fat16_root_first |
1185 | mov eax, ERROR_FILE_NOT_FOUND |
||
1186 | stc |
||
1187 | ret |
||
2288 | clevermous | 1188 | fat16_root_first: |
1189 | mov eax, [eax+4] |
||
2643 | clevermous | 1190 | add eax, [ebp+FAT.ROOT_START] |
2288 | clevermous | 1191 | push ebx |
2643 | clevermous | 1192 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1193 | mov ebx, edi |
2643 | clevermous | 1194 | call fs_read32_sys |
2288 | clevermous | 1195 | pop ebx |
2643 | clevermous | 1196 | test eax, eax |
2288 | clevermous | 1197 | jnz .readerr |
1198 | ret ; CF=0 |
||
1199 | .readerr: |
||
2643 | clevermous | 1200 | mov eax, ERROR_DEVICE |
2288 | clevermous | 1201 | stc |
1202 | ret |
||
2643 | clevermous | 1203 | .notfound: |
1204 | mov eax, ERROR_FILE_NOT_FOUND |
||
1205 | stc |
||
1206 | ret |
||
2288 | clevermous | 1207 | fat16_root_begin_write: |
1208 | push edi eax |
||
1209 | call fat16_root_first |
||
1210 | pop eax edi |
||
1211 | ret |
||
1212 | fat16_root_end_write: |
||
1213 | pusha |
||
1214 | mov eax, [eax+4] |
||
2643 | clevermous | 1215 | add eax, [ebp+FAT.ROOT_START] |
1216 | lea ebx, [ebp+FAT.buffer] |
||
1217 | call fs_write32_sys |
||
2288 | clevermous | 1218 | popa |
1219 | ret |
||
1220 | fat16_root_next_write: |
||
2643 | clevermous | 1221 | push ecx |
1222 | lea ecx, [ebp+FAT.buffer+0x200] |
||
1223 | cmp edi, ecx |
||
2288 | clevermous | 1224 | jae @f |
2643 | clevermous | 1225 | pop ecx |
2288 | clevermous | 1226 | ret |
1227 | @@: |
||
1228 | call fat16_root_end_write |
||
1229 | jmp fat16_root_next_sector |
||
1230 | fat16_root_extend_dir: |
||
1231 | stc |
||
1232 | ret |
||
1233 | |||
1234 | fat_notroot_next: |
||
2643 | clevermous | 1235 | push ecx |
1236 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
||
1237 | cmp edi, ecx |
||
2288 | clevermous | 1238 | jae fat_notroot_next_sector |
2643 | clevermous | 1239 | pop ecx |
2288 | clevermous | 1240 | add edi, 0x20 |
1241 | ret ; CF=0 |
||
1242 | fat_notroot_next_sector: |
||
2643 | clevermous | 1243 | push [ebp+FAT.longname_sec2] |
1244 | pop [ebp+FAT.longname_sec1] |
||
2288 | clevermous | 1245 | push eax |
1246 | call fat_get_sector |
||
2643 | clevermous | 1247 | mov [ebp+FAT.longname_sec2], eax |
2288 | clevermous | 1248 | pop eax |
1249 | mov ecx, [eax+4] |
||
1250 | inc ecx |
||
2643 | clevermous | 1251 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1252 | jae fat_notroot_next_cluster |
1253 | mov [eax+4], ecx |
||
1254 | jmp @f |
||
1255 | fat_notroot_next_cluster: |
||
1256 | push eax |
||
1257 | mov eax, [eax] |
||
1258 | call get_FAT |
||
1259 | mov ecx, eax |
||
1260 | pop eax |
||
2643 | clevermous | 1261 | jc fat_notroot_first.deverr |
1262 | cmp ecx, 2 |
||
1263 | jb fat_notroot_next_err |
||
1264 | cmp ecx, [ebp+FAT.fatRESERVED] |
||
2288 | clevermous | 1265 | jae fat_notroot_next_err |
1266 | mov [eax], ecx |
||
1267 | and dword [eax+4], 0 |
||
1268 | @@: |
||
1269 | pop ecx |
||
1270 | fat_notroot_first: |
||
1271 | call fat_get_sector |
||
1272 | push ebx |
||
2643 | clevermous | 1273 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1274 | mov ebx, edi |
2643 | clevermous | 1275 | call fs_read32_sys |
2288 | clevermous | 1276 | pop ebx |
2643 | clevermous | 1277 | test eax, eax |
1278 | jz .ret ; CF=0 |
||
1279 | push ecx |
||
1280 | .deverr: |
||
1281 | pop ecx |
||
1282 | mov eax, ERROR_DEVICE |
||
1283 | stc |
||
1284 | .ret: |
||
1285 | ret |
||
2288 | clevermous | 1286 | fat_notroot_next_err: |
1287 | pop ecx |
||
2643 | clevermous | 1288 | mov eax, ERROR_FILE_NOT_FOUND |
2288 | clevermous | 1289 | stc |
1290 | ret |
||
1291 | fat_notroot_begin_write: |
||
1292 | push eax edi |
||
1293 | call fat_notroot_first |
||
1294 | pop edi eax |
||
1295 | ret |
||
1296 | fat_notroot_end_write: |
||
1297 | call fat_get_sector |
||
1298 | push ebx |
||
2643 | clevermous | 1299 | lea ebx, [ebp+FAT.buffer] |
1300 | call fs_write32_sys |
||
2288 | clevermous | 1301 | pop ebx |
1302 | ret |
||
1303 | fat_notroot_next_write: |
||
2643 | clevermous | 1304 | push ecx |
1305 | lea ecx, [ebp+FAT.buffer+0x200] |
||
1306 | cmp edi, ecx |
||
2288 | clevermous | 1307 | jae @f |
2643 | clevermous | 1308 | pop ecx |
2288 | clevermous | 1309 | ret |
1310 | @@: |
||
1311 | push eax |
||
1312 | call fat_notroot_end_write |
||
1313 | pop eax |
||
1314 | jmp fat_notroot_next_sector |
||
1315 | fat_notroot_extend_dir: |
||
1316 | push eax |
||
1317 | call get_free_FAT |
||
1318 | jnc .found |
||
1319 | pop eax |
||
1320 | ret ; CF=1 |
||
1321 | .found: |
||
1322 | push edx |
||
2643 | clevermous | 1323 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 1324 | call set_FAT |
2643 | clevermous | 1325 | jc .writeerr |
2288 | clevermous | 1326 | mov edx, eax |
1327 | mov eax, [esp+4] |
||
1328 | mov eax, [eax] |
||
1329 | push edx |
||
1330 | call set_FAT |
||
1331 | pop edx |
||
2643 | clevermous | 1332 | jnc @f |
1333 | .writeerr: |
||
2288 | clevermous | 1334 | pop edx |
1335 | pop eax |
||
1336 | stc |
||
1337 | ret |
||
1338 | @@: |
||
1339 | push ecx |
||
1340 | or ecx, -1 |
||
1341 | call add_disk_free_space |
||
1342 | ; zero new cluster |
||
1343 | mov ecx, 512/4 |
||
2643 | clevermous | 1344 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1345 | push edi |
1346 | xor eax, eax |
||
1347 | rep stosd |
||
1348 | pop edi |
||
1349 | pop ecx |
||
1350 | mov eax, [esp+4] |
||
1351 | mov [eax], edx |
||
1352 | and dword [eax+4], 0 |
||
1353 | pop edx |
||
1354 | mov eax, [eax] |
||
1355 | dec eax |
||
1356 | dec eax |
||
1357 | push ebx ecx |
||
2643 | clevermous | 1358 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1359 | imul eax, ecx |
2643 | clevermous | 1360 | add eax, [ebp+FAT.DATA_START] |
2288 | clevermous | 1361 | mov ebx, edi |
1362 | @@: |
||
2643 | clevermous | 1363 | push eax |
1364 | call fs_write32_sys |
||
1365 | pop eax |
||
2288 | clevermous | 1366 | inc eax |
1367 | loop @b |
||
1368 | pop ecx ebx eax |
||
1369 | clc |
||
1370 | ret |
||
1371 | |||
1372 | fat_get_sector: |
||
1373 | push ecx |
||
1374 | mov ecx, [eax] |
||
1375 | dec ecx |
||
1376 | dec ecx |
||
2643 | clevermous | 1377 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
1378 | add ecx, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1379 | add ecx, [eax+4] |
1380 | mov eax, ecx |
||
1381 | pop ecx |
||
1382 | ret |
||
1383 | |||
1384 | ;---------------------------------------------------------------- |
||
1385 | ; |
||
1386 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
1387 | ; |
||
2643 | clevermous | 1388 | ; Obsolete, will be replaced with filesystem-specific functions. |
1389 | ; |
||
2288 | clevermous | 1390 | ; esi points to filename |
1391 | ; ebx ignored (reserved) |
||
1392 | ; ecx number of bytes to write, 0+ |
||
1393 | ; edx mem location to data |
||
1394 | ; |
||
1395 | ; ret ebx = number of written bytes |
||
1396 | ; eax = 0 ok read or other = errormsg |
||
1397 | ; |
||
1398 | ;-------------------------------------------------------------- |
||
1399 | fs_HdCreateFolder: |
||
1400 | mov al, 1 |
||
1401 | jmp fs_HdRewrite.common |
||
1402 | |||
1403 | fs_HdRewrite: |
||
1404 | xor eax, eax |
||
1405 | .common: |
||
2643 | clevermous | 1406 | cmp [fs_type], 16 |
1407 | jz @f |
||
1408 | cmp [fs_type], 32 |
||
1409 | jz @f |
||
2288 | clevermous | 1410 | cmp [fs_type], 1 |
1411 | jz ntfs_HdRewrite |
||
1412 | cmp [fs_type], 2 |
||
1413 | jz ext2_HdRewrite |
||
2643 | clevermous | 1414 | mov eax, ERROR_UNKNOWN_FS |
1415 | xor ebx, ebx |
||
1416 | ret |
||
2288 | clevermous | 1417 | @@: |
2643 | clevermous | 1418 | sub ebx, 4 |
1419 | push ebp |
||
1420 | mov ebp, [fs_dependent_data_start.partition] |
||
1421 | test eax, eax |
||
1422 | mov eax, fat_CreateFolder |
||
1423 | jnz @f |
||
1424 | mov eax, fat_Rewrite |
||
1425 | @@: |
||
1426 | call eax |
||
1427 | pop ebp |
||
1428 | ret |
||
1429 | |||
1430 | fshrad: |
||
1431 | call fat_unlock |
||
1432 | mov eax, ERROR_ACCESS_DENIED |
||
1433 | xor ebx, ebx |
||
1434 | ret |
||
1435 | |||
1436 | ;---------------------------------------------------------------- |
||
1437 | ; fat_CreateFolder - FAT16/32 implementation of creating a folder |
||
1438 | ; in: ebp = pointer to FAT structure |
||
1439 | ; in: esi+[esp+4] = name |
||
1440 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1441 | ; out: eax, ebx = return values for sysfunc 70 |
||
1442 | ;---------------------------------------------------------------- |
||
1443 | fat_CreateFolder: |
||
1444 | push 1 |
||
1445 | jmp fat_Rewrite.common |
||
1446 | |||
1447 | ;---------------------------------------------------------------- |
||
1448 | ; fat_HdRewrite - FAT16/32 implementation of creating a new file |
||
1449 | ; in: ebp = pointer to FAT structure |
||
1450 | ; in: esi+[esp+4] = name |
||
1451 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1452 | ; out: eax, ebx = return values for sysfunc 70 |
||
1453 | ;---------------------------------------------------------------- |
||
1454 | fat_Rewrite: |
||
1455 | push 0 |
||
1456 | .common: |
||
1457 | call fat_lock |
||
1458 | pop eax |
||
2288 | clevermous | 1459 | cmp byte [esi], 0 |
1460 | jz fshrad |
||
2643 | clevermous | 1461 | mov ecx, [ebx+12] |
1462 | mov edx, [ebx+16] |
||
2288 | clevermous | 1463 | pushad |
1464 | xor edi, edi |
||
2643 | clevermous | 1465 | mov edx, [esp+4+20h] |
2288 | clevermous | 1466 | push esi |
2643 | clevermous | 1467 | test edx, edx |
2288 | clevermous | 1468 | jz @f |
2643 | clevermous | 1469 | mov esi, edx |
2288 | clevermous | 1470 | @@: |
1471 | lodsb |
||
1472 | test al, al |
||
1473 | jz @f |
||
1474 | cmp al, '/' |
||
1475 | jnz @b |
||
1476 | lea edi, [esi-1] |
||
1477 | jmp @b |
||
1478 | @@: |
||
1479 | pop esi |
||
1480 | test edi, edi |
||
1481 | jnz .noroot |
||
2643 | clevermous | 1482 | test edx, edx |
2288 | clevermous | 1483 | jnz .hasebp |
2643 | clevermous | 1484 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
1485 | cmp [ebp+FAT.fs_type], 32 |
||
2288 | clevermous | 1486 | jz .pushnotroot |
2643 | clevermous | 1487 | xor edx, edx |
1488 | push edx |
||
2288 | clevermous | 1489 | push fat16_root_extend_dir |
1490 | push fat16_root_end_write |
||
1491 | push fat16_root_next_write |
||
1492 | push fat16_root_begin_write |
||
2643 | clevermous | 1493 | push edx |
1494 | push edx |
||
2288 | clevermous | 1495 | push fat16_root_first |
1496 | push fat16_root_next |
||
1497 | jmp .common1 |
||
1498 | .hasebp: |
||
1499 | mov eax, ERROR_ACCESS_DENIED |
||
2643 | clevermous | 1500 | cmp byte [edx], 0 |
2288 | clevermous | 1501 | jz .ret1 |
2643 | clevermous | 1502 | stdcall hd_find_lfn, 0 |
1503 | mov esi, [esp+4+20h] |
||
1504 | jc .ret1 |
||
2288 | clevermous | 1505 | jmp .common0 |
1506 | .noroot: |
||
1507 | mov eax, ERROR_ACCESS_DENIED |
||
1508 | cmp byte [edi+1], 0 |
||
1509 | jz .ret1 |
||
1510 | ; check existence |
||
1511 | mov byte [edi], 0 |
||
1512 | push edi |
||
2643 | clevermous | 1513 | stdcall hd_find_lfn, [esp+4+24h] |
2288 | clevermous | 1514 | pop esi |
1515 | mov byte [esi], '/' |
||
1516 | jnc @f |
||
1517 | .notfound0: |
||
1518 | mov eax, ERROR_FILE_NOT_FOUND |
||
1519 | .ret1: |
||
1520 | mov [esp+28], eax |
||
2643 | clevermous | 1521 | call fat_unlock |
2288 | clevermous | 1522 | popad |
1523 | xor ebx, ebx |
||
1524 | ret |
||
1525 | @@: |
||
1526 | inc esi |
||
1527 | .common0: |
||
1528 | test byte [edi+11], 0x10 ; must be directory |
||
1529 | mov eax, ERROR_ACCESS_DENIED |
||
1530 | jz .ret1 |
||
2643 | clevermous | 1531 | mov edx, [edi+20-2] |
1532 | mov dx, [edi+26] ; ebp=cluster |
||
2288 | clevermous | 1533 | mov eax, ERROR_FAT_TABLE |
2643 | clevermous | 1534 | cmp edx, 2 |
2288 | clevermous | 1535 | jb .ret1 |
1536 | .pushnotroot: |
||
2643 | clevermous | 1537 | push edx |
2288 | clevermous | 1538 | push fat_notroot_extend_dir |
1539 | push fat_notroot_end_write |
||
1540 | push fat_notroot_next_write |
||
1541 | push fat_notroot_begin_write |
||
1542 | push 0 |
||
2643 | clevermous | 1543 | push edx |
2288 | clevermous | 1544 | push fat_notroot_first |
1545 | push fat_notroot_next |
||
1546 | .common1: |
||
1547 | call fat_find_lfn |
||
1548 | jc .notfound |
||
1549 | ; found |
||
1550 | test byte [edi+11], 10h |
||
1551 | jz .exists_file |
||
1552 | ; found directory; if we are creating directory, return OK, |
||
1553 | ; if we are creating file, say "access denied" |
||
2643 | clevermous | 1554 | add esp, 36 |
1555 | call fat_unlock |
||
2288 | clevermous | 1556 | popad |
1557 | test al, al |
||
1558 | mov eax, ERROR_ACCESS_DENIED |
||
1559 | jz @f |
||
1560 | mov al, 0 |
||
1561 | @@: |
||
1562 | xor ebx, ebx |
||
1563 | ret |
||
1564 | .exists_file: |
||
1565 | ; found file; if we are creating directory, return "access denied", |
||
1566 | ; if we are creating file, delete existing file and continue |
||
2643 | clevermous | 1567 | cmp byte [esp+36+28], 0 |
2288 | clevermous | 1568 | jz @f |
2643 | clevermous | 1569 | add esp, 36 |
1570 | call fat_unlock |
||
2288 | clevermous | 1571 | popad |
1572 | mov eax, ERROR_ACCESS_DENIED |
||
1573 | xor ebx, ebx |
||
1574 | ret |
||
1575 | @@: |
||
1576 | ; delete FAT chain |
||
1577 | push edi |
||
1578 | xor eax, eax |
||
1579 | mov dword [edi+28], eax ; zero size |
||
1580 | xor ecx, ecx |
||
1581 | mov eax, [edi+20-2] |
||
1582 | mov ax, [edi+26] |
||
1583 | mov word [edi+20], cx |
||
1584 | mov word [edi+26], cx |
||
1585 | test eax, eax |
||
1586 | jz .done1 |
||
1587 | @@: |
||
2643 | clevermous | 1588 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1589 | jae .done1 |
1590 | push edx |
||
1591 | xor edx, edx |
||
1592 | call set_FAT |
||
1593 | mov eax, edx |
||
1594 | pop edx |
||
2643 | clevermous | 1595 | jc .done1 |
2288 | clevermous | 1596 | inc ecx |
1597 | jmp @b |
||
1598 | .done1: |
||
1599 | pop edi |
||
1600 | call get_time_for_file |
||
1601 | mov [edi+22], ax |
||
1602 | call get_date_for_file |
||
1603 | mov [edi+24], ax |
||
1604 | mov [edi+18], ax |
||
1605 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1606 | jmp .doit |
||
1607 | .notfound: |
||
1608 | ; file is not found; generate short name |
||
1609 | call fat_name_is_legal |
||
1610 | jc @f |
||
2643 | clevermous | 1611 | add esp, 36 |
1612 | call fat_unlock |
||
2288 | clevermous | 1613 | popad |
1614 | mov eax, ERROR_FILE_NOT_FOUND |
||
1615 | xor ebx, ebx |
||
1616 | ret |
||
1617 | @@: |
||
1618 | sub esp, 12 |
||
1619 | mov edi, esp |
||
1620 | call fat_gen_short_name |
||
1621 | .test_short_name_loop: |
||
1622 | push esi edi ecx |
||
1623 | mov esi, edi |
||
1624 | lea eax, [esp+12+12+8] |
||
2643 | clevermous | 1625 | mov edx, [eax+24] |
1626 | mov [eax], edx |
||
2288 | clevermous | 1627 | and dword [eax+4], 0 |
1628 | call dword [eax-4] |
||
1629 | jc .found |
||
1630 | .test_short_name_entry: |
||
1631 | cmp byte [edi+11], 0xF |
||
1632 | jz .test_short_name_cont |
||
1633 | mov ecx, 11 |
||
1634 | push esi edi |
||
1635 | repz cmpsb |
||
1636 | pop edi esi |
||
1637 | jz .short_name_found |
||
1638 | .test_short_name_cont: |
||
1639 | lea eax, [esp+12+12+8] |
||
1640 | call dword [eax-8] |
||
1641 | jnc .test_short_name_entry |
||
1642 | jmp .found |
||
1643 | .short_name_found: |
||
1644 | pop ecx edi esi |
||
1645 | call fat_next_short_name |
||
1646 | jnc .test_short_name_loop |
||
1647 | .disk_full: |
||
2643 | clevermous | 1648 | add esp, 12+36 |
1649 | call fat_unlock |
||
2288 | clevermous | 1650 | popa |
1651 | mov eax, ERROR_DISK_FULL |
||
1652 | xor ebx, ebx |
||
1653 | ret |
||
1654 | .found: |
||
1655 | pop ecx edi esi |
||
1656 | ; now find space in directory |
||
1657 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1658 | mov al, '~' |
||
1659 | push ecx edi |
||
1660 | mov ecx, 8 |
||
1661 | repnz scasb |
||
1662 | push 1 |
||
1663 | pop eax ; 1 entry |
||
1664 | jnz .notilde |
||
1665 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1666 | xor eax, eax |
||
1667 | @@: |
||
1668 | cmp byte [esi], 0 |
||
1669 | jz @f |
||
1670 | inc esi |
||
1671 | inc eax |
||
1672 | jmp @b |
||
1673 | @@: |
||
1674 | sub esi, eax |
||
1675 | add eax, 12+13 |
||
1676 | mov ecx, 13 |
||
1677 | push edx |
||
1678 | cdq |
||
1679 | div ecx |
||
1680 | pop edx |
||
1681 | .notilde: |
||
1682 | push -1 |
||
1683 | push -1 |
||
1684 | push -1 |
||
1685 | ; find |
||
1686 | xor ecx, ecx |
||
1687 | push eax |
||
1688 | lea eax, [esp+16+8+12+8] |
||
2643 | clevermous | 1689 | mov edx, [eax+24] |
1690 | mov [eax], edx |
||
2288 | clevermous | 1691 | and dword [eax+4], 0 |
1692 | call dword [eax-4] |
||
1693 | pop eax |
||
1694 | jnc .scan_dir |
||
1695 | .fsfrfe3: |
||
2643 | clevermous | 1696 | add esp, 12+8+12+36 |
1697 | call fat_unlock |
||
2288 | clevermous | 1698 | popad |
2643 | clevermous | 1699 | mov eax, ERROR_DEVICE |
2288 | clevermous | 1700 | xor ebx, ebx |
1701 | ret |
||
1702 | .scan_dir: |
||
1703 | cmp byte [edi], 0 |
||
1704 | jz .free |
||
1705 | cmp byte [edi], 0xE5 |
||
1706 | jz .free |
||
1707 | xor ecx, ecx |
||
1708 | .scan_cont: |
||
1709 | push eax |
||
1710 | lea eax, [esp+16+8+12+8] |
||
1711 | call dword [eax-8] |
||
2643 | clevermous | 1712 | mov edx, eax |
2288 | clevermous | 1713 | pop eax |
1714 | jnc .scan_dir |
||
2643 | clevermous | 1715 | cmp edx, ERROR_DEVICE |
1716 | jz .fsfrfe3 |
||
2288 | clevermous | 1717 | push eax |
1718 | lea eax, [esp+16+8+12+8] |
||
1719 | call dword [eax+20] ; extend directory |
||
1720 | pop eax |
||
1721 | jnc .scan_dir |
||
2643 | clevermous | 1722 | add esp, 12+8+12+36 |
1723 | call fat_unlock |
||
2288 | clevermous | 1724 | popad |
1725 | mov eax, ERROR_DISK_FULL |
||
1726 | xor ebx, ebx |
||
1727 | ret |
||
1728 | .free: |
||
1729 | test ecx, ecx |
||
1730 | jnz @f |
||
1731 | mov [esp], edi |
||
1732 | mov ecx, [esp+12+8+12+8] |
||
1733 | mov [esp+4], ecx |
||
1734 | mov ecx, [esp+12+8+12+12] |
||
1735 | mov [esp+8], ecx |
||
1736 | xor ecx, ecx |
||
1737 | @@: |
||
1738 | inc ecx |
||
1739 | cmp ecx, eax |
||
1740 | jb .scan_cont |
||
1741 | ; found! |
||
2643 | clevermous | 1742 | push esi ecx |
1743 | ; If creating a directory, allocate one data cluster now and fail immediately |
||
1744 | ; if this is impossible. This prevents from creating an invalid directory entry |
||
1745 | ; on a full disk. |
||
1746 | ; yup, the argument is quite non-intuitive... but what should I do if |
||
1747 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
||
1748 | ; which in turn is filled with 0 in fat_Rewrite and 1 in fat_CreateFolder. |
||
1749 | cmp byte [esp+8+12+8+12+36+28], 0 |
||
1750 | jz .no.preallocate.folder.data |
||
1751 | call get_free_FAT |
||
1752 | jnc @f |
||
1753 | add esp, 8+12+8 |
||
1754 | jmp .disk_full |
||
1755 | @@: |
||
1756 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
||
1757 | .no.preallocate.folder.data: |
||
2288 | clevermous | 1758 | ; calculate name checksum |
1759 | mov esi, [esp+8+12] |
||
1760 | mov ecx, 11 |
||
1761 | xor eax, eax |
||
1762 | @@: |
||
1763 | ror al, 1 |
||
1764 | add al, [esi] |
||
1765 | inc esi |
||
1766 | loop @b |
||
1767 | pop ecx esi |
||
1768 | pop edi |
||
1769 | pop dword [esp+8+12+12] |
||
1770 | pop dword [esp+8+12+12] |
||
1771 | ; edi points to first entry in free chunk |
||
1772 | dec ecx |
||
1773 | jz .nolfn |
||
1774 | push esi |
||
1775 | push eax |
||
1776 | lea eax, [esp+8+8+12+8] |
||
1777 | call dword [eax+8] ; begin write |
||
1778 | mov al, 40h |
||
1779 | .writelfn: |
||
1780 | or al, cl |
||
1781 | mov esi, [esp+4] |
||
1782 | push ecx |
||
1783 | dec ecx |
||
1784 | imul ecx, 13 |
||
1785 | add esi, ecx |
||
1786 | stosb |
||
1787 | mov cl, 5 |
||
1788 | call fs_RamdiskRewrite.read_symbols |
||
1789 | mov ax, 0xF |
||
1790 | stosw |
||
1791 | mov al, [esp+4] |
||
1792 | stosb |
||
1793 | mov cl, 6 |
||
1794 | call fs_RamdiskRewrite.read_symbols |
||
1795 | xor eax, eax |
||
1796 | stosw |
||
1797 | mov cl, 2 |
||
1798 | call fs_RamdiskRewrite.read_symbols |
||
1799 | pop ecx |
||
1800 | lea eax, [esp+8+8+12+8] |
||
1801 | call dword [eax+12] ; next write |
||
1802 | xor eax, eax |
||
1803 | loop .writelfn |
||
1804 | pop eax |
||
1805 | pop esi |
||
1806 | ; lea eax, [esp+8+12+8] |
||
1807 | ; call dword [eax+16] ; end write |
||
1808 | .nolfn: |
||
1809 | xchg esi, [esp] |
||
1810 | mov ecx, 11 |
||
1811 | rep movsb |
||
1812 | mov word [edi], 20h ; attributes |
||
1813 | sub edi, 11 |
||
1814 | pop esi ecx |
||
1815 | add esp, 12 |
||
1816 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1817 | call get_time_for_file |
||
1818 | mov [edi+14], ax ; creation time |
||
1819 | mov [edi+22], ax ; last write time |
||
1820 | call get_date_for_file |
||
1821 | mov [edi+16], ax ; creation date |
||
1822 | mov [edi+24], ax ; last write date |
||
1823 | mov [edi+18], ax ; last access date |
||
1824 | xor ecx, ecx |
||
1825 | mov word [edi+20], cx ; high word of cluster |
||
1826 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
1827 | mov dword [edi+28], ecx ; file size - to be filled |
||
2643 | clevermous | 1828 | cmp byte [esp+36+28], cl |
2288 | clevermous | 1829 | jz .doit |
1830 | ; create directory |
||
1831 | mov byte [edi+11], 10h ; attributes: folder |
||
2643 | clevermous | 1832 | mov esi, edi |
2288 | clevermous | 1833 | lea eax, [esp+8] |
1834 | call dword [eax+16] ; flush directory |
||
2643 | clevermous | 1835 | mov eax, [esp+36+20] ; extract saved cluster |
1836 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
||
2288 | clevermous | 1837 | push ecx |
2643 | clevermous | 1838 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1839 | shl ecx, 9 |
2643 | clevermous | 1840 | push ecx |
1841 | push edi |
||
2288 | clevermous | 1842 | jmp .doit2 |
1843 | .doit: |
||
2643 | clevermous | 1844 | mov esi, [esp+36+20] |
2288 | clevermous | 1845 | lea eax, [esp+8] |
1846 | call dword [eax+16] ; flush directory |
||
1847 | push ecx |
||
2643 | clevermous | 1848 | mov ecx, [esp+4+36+24] |
2288 | clevermous | 1849 | push ecx |
1850 | push edi |
||
1851 | test ecx, ecx |
||
1852 | jz .done |
||
1853 | call get_free_FAT |
||
1854 | jc .diskfull |
||
2643 | clevermous | 1855 | .doit2: |
2288 | clevermous | 1856 | push eax |
1857 | mov [edi+26], ax |
||
1858 | shr eax, 16 |
||
1859 | mov [edi+20], ax |
||
1860 | lea eax, [esp+16+8] |
||
1861 | call dword [eax+16] ; flush directory |
||
1862 | pop eax |
||
1863 | push edx |
||
2643 | clevermous | 1864 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 1865 | call set_FAT |
1866 | pop edx |
||
1867 | .write_cluster: |
||
1868 | push eax |
||
1869 | dec eax |
||
1870 | dec eax |
||
2643 | clevermous | 1871 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1872 | add eax, [ebp+FAT.DATA_START] |
||
1873 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 1874 | ; write data |
1875 | .write_sector: |
||
2643 | clevermous | 1876 | cmp byte [esp+20+36+28], 0 |
2288 | clevermous | 1877 | jnz .writedir |
1878 | mov ecx, 512 |
||
2643 | clevermous | 1879 | cmp dword [esp+12], ecx |
2288 | clevermous | 1880 | jb .writeshort |
1881 | ; we can write directly from given buffer |
||
1882 | mov ebx, esi |
||
1883 | add esi, ecx |
||
1884 | jmp .writecommon |
||
1885 | .writeshort: |
||
2643 | clevermous | 1886 | mov ecx, [esp+12] |
2288 | clevermous | 1887 | push ecx |
2643 | clevermous | 1888 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1889 | mov ebx, edi |
1890 | rep movsb |
||
1891 | .writedircont: |
||
2643 | clevermous | 1892 | lea ecx, [ebp+FAT.buffer+0x200] |
2288 | clevermous | 1893 | sub ecx, edi |
1894 | push eax |
||
1895 | xor eax, eax |
||
1896 | rep stosb |
||
1897 | pop eax |
||
1898 | pop ecx |
||
1899 | .writecommon: |
||
2643 | clevermous | 1900 | push eax |
1901 | call fs_write32_app |
||
1902 | test eax, eax |
||
1903 | pop eax |
||
2288 | clevermous | 1904 | jnz .writeerr |
1905 | inc eax |
||
2643 | clevermous | 1906 | sub dword [esp+12], ecx |
2288 | clevermous | 1907 | jz .writedone |
2643 | clevermous | 1908 | dec dword [esp] |
2288 | clevermous | 1909 | jnz .write_sector |
2643 | clevermous | 1910 | pop eax |
2288 | clevermous | 1911 | ; allocate new cluster |
1912 | pop eax |
||
1913 | mov ecx, eax |
||
1914 | call get_free_FAT |
||
1915 | jc .diskfull |
||
1916 | push edx |
||
2643 | clevermous | 1917 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 1918 | call set_FAT |
1919 | xchg eax, ecx |
||
1920 | mov edx, ecx |
||
1921 | call set_FAT |
||
1922 | pop edx |
||
1923 | xchg eax, ecx |
||
1924 | jmp .write_cluster |
||
1925 | .diskfull: |
||
1926 | mov eax, ERROR_DISK_FULL |
||
1927 | jmp .ret |
||
1928 | .writeerr: |
||
2643 | clevermous | 1929 | pop eax eax |
2288 | clevermous | 1930 | sub esi, ecx |
2643 | clevermous | 1931 | mov eax, ERROR_DEVICE |
2288 | clevermous | 1932 | jmp .ret |
1933 | .writedone: |
||
2643 | clevermous | 1934 | pop eax eax |
2288 | clevermous | 1935 | .done: |
1936 | xor eax, eax |
||
1937 | .ret: |
||
1938 | pop edi ecx |
||
2643 | clevermous | 1939 | sub esi, [esp+4+36+20] |
1940 | mov [esp+4+36+28], eax |
||
1941 | mov [esp+4+36+16], esi |
||
1942 | lea eax, [esp+12] |
||
2288 | clevermous | 1943 | call dword [eax+8] |
2643 | clevermous | 1944 | mov [edi+28], esi |
2288 | clevermous | 1945 | call dword [eax+16] |
2643 | clevermous | 1946 | mov [esp+36+16], ebx |
1947 | lea eax, [esi+511] |
||
2288 | clevermous | 1948 | shr eax, 9 |
2643 | clevermous | 1949 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1950 | lea eax, [eax+ecx-1] |
1951 | xor edx, edx |
||
1952 | div ecx |
||
2643 | clevermous | 1953 | pop ecx |
2288 | clevermous | 1954 | sub ecx, eax |
1955 | call add_disk_free_space |
||
2643 | clevermous | 1956 | add esp, 36 |
2288 | clevermous | 1957 | call update_disk |
2643 | clevermous | 1958 | call fat_unlock |
2288 | clevermous | 1959 | popad |
1960 | ret |
||
1961 | .writedir: |
||
1962 | push 512 |
||
2643 | clevermous | 1963 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1964 | mov ebx, edi |
2643 | clevermous | 1965 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1966 | shl ecx, 9 |
2643 | clevermous | 1967 | cmp ecx, [esp+16] |
2288 | clevermous | 1968 | jnz .writedircont |
2643 | clevermous | 1969 | dec dword [esp+20] |
2288 | clevermous | 1970 | push esi |
1971 | mov ecx, 32/4 |
||
1972 | rep movsd |
||
1973 | pop esi |
||
1974 | mov dword [edi-32], '. ' |
||
1975 | mov dword [edi-32+4], ' ' |
||
1976 | mov dword [edi-32+8], ' ' |
||
1977 | mov byte [edi-32+11], 10h |
||
1978 | push esi |
||
1979 | mov ecx, 32/4 |
||
1980 | rep movsd |
||
1981 | pop esi |
||
1982 | mov dword [edi-32], '.. ' |
||
1983 | mov dword [edi-32+4], ' ' |
||
1984 | mov dword [edi-32+8], ' ' |
||
1985 | mov byte [edi-32+11], 10h |
||
2643 | clevermous | 1986 | mov ecx, [esp+20+36] |
1987 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
||
2288 | clevermous | 1988 | jnz @f |
1989 | xor ecx, ecx |
||
1990 | @@: |
||
1991 | mov word [edi-32+26], cx |
||
1992 | shr ecx, 16 |
||
1993 | mov [edi-32+20], cx |
||
1994 | jmp .writedircont |
||
1995 | |||
1996 | ;---------------------------------------------------------------- |
||
1997 | ; |
||
1998 | ; fs_HdWrite - LFN variant for writing to hard disk |
||
1999 | ; |
||
2643 | clevermous | 2000 | ; Obsolete, will be replaced with filesystem-specific functions. |
2001 | ; |
||
2288 | clevermous | 2002 | ; esi points to filename |
2003 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2004 | ; may be ebx=0 - start from first byte |
||
2005 | ; ecx number of bytes to write, 0+ |
||
2006 | ; edx mem location to data |
||
2007 | ; |
||
2008 | ; ret ebx = bytes written (maybe 0) |
||
2009 | ; eax = 0 ok write or other = errormsg |
||
2010 | ; |
||
2011 | ;-------------------------------------------------------------- |
||
2643 | clevermous | 2012 | fat_Write.access_denied: |
2288 | clevermous | 2013 | push ERROR_ACCESS_DENIED |
2014 | fs_HdWrite.ret0: |
||
2015 | pop eax |
||
2016 | xor ebx, ebx |
||
2017 | ret |
||
2018 | |||
2019 | fs_HdWrite.ret11: |
||
2643 | clevermous | 2020 | push ERROR_DEVICE |
2288 | clevermous | 2021 | jmp fs_HdWrite.ret0 |
2022 | |||
2023 | fs_HdWrite: |
||
2643 | clevermous | 2024 | cmp [fs_type], 16 |
2025 | jz @f |
||
2026 | cmp [fs_type], 32 |
||
2027 | jz @f |
||
2288 | clevermous | 2028 | cmp [fs_type], 1 |
2029 | jz ntfs_HdWrite |
||
2030 | cmp [fs_type], 2 |
||
2031 | jz ext2_HdWrite |
||
2032 | push ERROR_UNKNOWN_FS |
||
2033 | jmp .ret0 |
||
2034 | @@: |
||
2643 | clevermous | 2035 | sub ebx, 4 |
2036 | push ebp |
||
2037 | mov ebp, [fs_dependent_data_start.partition] |
||
2038 | call fat_Write |
||
2039 | pop ebp |
||
2040 | ret |
||
2041 | |||
2042 | ;---------------------------------------------------------------- |
||
2043 | ; fat_Write - FAT16/32 implementation of writing to file |
||
2044 | ; in: ebp = pointer to FAT structure |
||
2045 | ; in: esi+[esp+4] = name |
||
2046 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2047 | ; out: eax, ebx = return values for sysfunc 70 |
||
2048 | ;---------------------------------------------------------------- |
||
2049 | fat_Write: |
||
2288 | clevermous | 2050 | cmp byte [esi], 0 |
2051 | jz .access_denied |
||
2643 | clevermous | 2052 | call fat_lock |
2053 | push edi |
||
2054 | stdcall hd_find_lfn, [esp+4+4] |
||
2288 | clevermous | 2055 | jnc .found |
2643 | clevermous | 2056 | pop edi |
2057 | push eax |
||
2058 | call fat_unlock |
||
2059 | jmp fs_HdWrite.ret0 |
||
2288 | clevermous | 2060 | .found: |
2061 | ; FAT does not support files larger than 4GB |
||
2643 | clevermous | 2062 | cmp dword [ebx+8], 0 |
2288 | clevermous | 2063 | jz @f |
2064 | .eof: |
||
2643 | clevermous | 2065 | pop edi |
2288 | clevermous | 2066 | push ERROR_END_OF_FILE |
2643 | clevermous | 2067 | call fat_unlock |
2068 | jmp fs_HdWrite.ret0 |
||
2288 | clevermous | 2069 | @@: |
2643 | clevermous | 2070 | mov ecx, [ebx+12] |
2071 | mov edx, [ebx+16] |
||
2072 | mov ebx, [ebx+4] |
||
2288 | clevermous | 2073 | ; now edi points to direntry, ebx=start byte to write, |
2074 | ; ecx=number of bytes to write, edx=data pointer |
||
2075 | |||
2076 | ; extend file if needed |
||
2077 | add ecx, ebx |
||
2078 | jc .eof ; FAT does not support files larger than 4GB |
||
2643 | clevermous | 2079 | push edx |
2288 | clevermous | 2080 | push eax ; save directory sector |
2081 | push 0 ; return value=0 |
||
2082 | |||
2083 | call get_time_for_file |
||
2084 | mov [edi+22], ax ; last write time |
||
2085 | call get_date_for_file |
||
2086 | mov [edi+24], ax ; last write date |
||
2087 | mov [edi+18], ax ; last access date |
||
2088 | |||
2089 | push dword [edi+28] ; save current file size |
||
2090 | cmp ecx, [edi+28] |
||
2091 | jbe .length_ok |
||
2092 | cmp ecx, ebx |
||
2093 | jz .length_ok |
||
2094 | call hd_extend_file |
||
2095 | jnc .length_ok |
||
2096 | mov [esp+4], eax |
||
2097 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2098 | ; First two cases are fatal errors, in third case we may write some data |
||
2099 | cmp al, ERROR_DISK_FULL |
||
2100 | jz .disk_full |
||
2643 | clevermous | 2101 | call fat_unlock |
2288 | clevermous | 2102 | pop eax |
2103 | pop eax |
||
2643 | clevermous | 2104 | pop ecx |
2105 | pop edx |
||
2106 | pop edi |
||
2288 | clevermous | 2107 | xor ebx, ebx |
2108 | ret |
||
2109 | .disk_full: |
||
2110 | ; correct number of bytes to write |
||
2111 | mov ecx, [edi+28] |
||
2112 | cmp ecx, ebx |
||
2113 | ja .length_ok |
||
2643 | clevermous | 2114 | push 0 |
2288 | clevermous | 2115 | .ret: |
2643 | clevermous | 2116 | pop eax |
2117 | sub edx, [esp+12] |
||
2118 | mov ebx, edx ; ebx=number of written bytes |
||
2288 | clevermous | 2119 | call update_disk |
2643 | clevermous | 2120 | test eax, eax |
2288 | clevermous | 2121 | jz @f |
2643 | clevermous | 2122 | mov byte [esp+4], ERROR_DEVICE |
2288 | clevermous | 2123 | @@: |
2643 | clevermous | 2124 | call fat_unlock |
2288 | clevermous | 2125 | pop eax |
2126 | pop eax |
||
2643 | clevermous | 2127 | pop ecx |
2128 | pop edx |
||
2129 | pop edi |
||
2288 | clevermous | 2130 | ret |
2131 | .length_ok: |
||
2132 | mov esi, [edi+28] |
||
2133 | mov eax, [edi+20-2] |
||
2134 | mov ax, [edi+26] |
||
2135 | mov edi, eax ; edi=current cluster |
||
2643 | clevermous | 2136 | push 0 ; current sector in cluster |
2288 | clevermous | 2137 | ; save directory |
2643 | clevermous | 2138 | mov eax, [esp+12] |
2288 | clevermous | 2139 | push ebx |
2643 | clevermous | 2140 | lea ebx, [ebp+FAT.buffer] |
2141 | call fs_write32_sys |
||
2288 | clevermous | 2142 | pop ebx |
2643 | clevermous | 2143 | test eax, eax |
2288 | clevermous | 2144 | jz @f |
2145 | .device_err: |
||
2643 | clevermous | 2146 | mov byte [esp+8], ERROR_DEVICE |
2288 | clevermous | 2147 | jmp .ret |
2643 | clevermous | 2148 | .fat_err: |
2149 | mov byte [esp+8], ERROR_FAT_TABLE |
||
2150 | jmp .ret |
||
2288 | clevermous | 2151 | @@: |
2152 | |||
2153 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
2154 | sub ecx, ebx |
||
2155 | jz .ret |
||
2156 | .write_loop: |
||
2157 | ; skip unmodified sectors |
||
2643 | clevermous | 2158 | cmp dword [esp+4], 0x200 |
2288 | clevermous | 2159 | jb .modify |
2160 | sub ebx, 0x200 |
||
2161 | jae .skip |
||
2162 | add ebx, 0x200 |
||
2163 | .modify: |
||
2164 | ; get length of data in current sector |
||
2165 | push ecx |
||
2166 | sub ebx, 0x200 |
||
2167 | jb .hasdata |
||
2168 | neg ebx |
||
2169 | xor ecx, ecx |
||
2170 | jmp @f |
||
2171 | .hasdata: |
||
2172 | neg ebx |
||
2173 | cmp ecx, ebx |
||
2174 | jbe @f |
||
2175 | mov ecx, ebx |
||
2176 | @@: |
||
2177 | ; get current sector number |
||
2178 | mov eax, edi |
||
2179 | dec eax |
||
2180 | dec eax |
||
2643 | clevermous | 2181 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2182 | add eax, [ebp+FAT.DATA_START] |
||
2183 | add eax, [esp+4] |
||
2288 | clevermous | 2184 | ; load sector if needed |
2643 | clevermous | 2185 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
2288 | clevermous | 2186 | jz .noread |
2187 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2188 | jz .noread |
||
2189 | cmp ecx, esi ; (same for the last sector) |
||
2190 | jz .noread |
||
2643 | clevermous | 2191 | push eax ebx |
2192 | lea ebx, [ebp+FAT.buffer] |
||
2193 | call fs_read32_app |
||
2194 | test eax, eax |
||
2195 | pop ebx eax |
||
2288 | clevermous | 2196 | jz @f |
2197 | .device_err2: |
||
2198 | pop ecx |
||
2199 | jmp .device_err |
||
2200 | @@: |
||
2201 | .noread: |
||
2202 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2203 | push eax ecx edi |
||
2204 | xor eax, eax |
||
2205 | mov ecx, 0x200 |
||
2643 | clevermous | 2206 | sub ecx, [esp+8+12] |
2288 | clevermous | 2207 | jbe @f |
2643 | clevermous | 2208 | lea edi, [ebp+FAT.buffer] |
2209 | add edi, [esp+8+12] |
||
2288 | clevermous | 2210 | rep stosb |
2211 | @@: |
||
2212 | ; zero uninitialized data in the last sector |
||
2213 | mov ecx, 0x200 |
||
2214 | sub ecx, esi |
||
2215 | jbe @f |
||
2643 | clevermous | 2216 | lea edi, [ebp+FAT.buffer+esi] |
2288 | clevermous | 2217 | rep stosb |
2218 | @@: |
||
2219 | pop edi ecx |
||
2220 | ; copy new data |
||
2221 | mov eax, edx |
||
2222 | neg ebx |
||
2223 | jecxz @f |
||
2643 | clevermous | 2224 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
2288 | clevermous | 2225 | call memmove |
2226 | xor ebx, ebx |
||
2227 | @@: |
||
2228 | pop eax |
||
2229 | ; save sector |
||
2230 | push ebx |
||
2643 | clevermous | 2231 | lea ebx, [ebp+FAT.buffer] |
2232 | call fs_write32_app |
||
2288 | clevermous | 2233 | pop ebx |
2643 | clevermous | 2234 | test eax, eax |
2288 | clevermous | 2235 | jnz .device_err2 |
2236 | add edx, ecx |
||
2237 | sub [esp], ecx |
||
2238 | pop ecx |
||
2239 | jz .ret |
||
2240 | .skip: |
||
2241 | ; next sector |
||
2643 | clevermous | 2242 | pop eax |
2243 | inc eax |
||
2244 | push eax |
||
2245 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2246 | jb @f |
2643 | clevermous | 2247 | and dword [esp], 0 |
2288 | clevermous | 2248 | mov eax, edi |
2249 | call get_FAT |
||
2250 | mov edi, eax |
||
2643 | clevermous | 2251 | jc .device_err |
2252 | cmp edi, 2 |
||
2253 | jb .fat_err |
||
2254 | cmp edi, [ebp+FAT.fatRESERVED] |
||
2255 | jae .fat_err |
||
2288 | clevermous | 2256 | @@: |
2257 | sub esi, 0x200 |
||
2258 | jae @f |
||
2259 | xor esi, esi |
||
2260 | @@: |
||
2643 | clevermous | 2261 | sub dword [esp+4], 0x200 |
2288 | clevermous | 2262 | jae @f |
2643 | clevermous | 2263 | and dword [esp+4], 0 |
2288 | clevermous | 2264 | @@: |
2265 | jmp .write_loop |
||
2266 | |||
2267 | hd_extend_file.zero_size: |
||
2268 | xor eax, eax |
||
2269 | jmp hd_extend_file.start_extend |
||
2270 | |||
2271 | ; extends file on hd to given size (new data area is undefined) |
||
2272 | ; in: edi->direntry, ecx=new size |
||
2273 | ; out: CF=0 => OK, eax=0 |
||
2643 | clevermous | 2274 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or ERROR_DEVICE) |
2288 | clevermous | 2275 | hd_extend_file: |
2643 | clevermous | 2276 | push esi |
2277 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2278 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
||
2288 | clevermous | 2279 | push ecx |
2280 | ; find the last cluster of file |
||
2281 | mov eax, [edi+20-2] |
||
2282 | mov ax, [edi+26] |
||
2283 | mov ecx, [edi+28] |
||
2284 | jecxz .zero_size |
||
2285 | .last_loop: |
||
2643 | clevermous | 2286 | sub ecx, esi |
2288 | clevermous | 2287 | jbe .last_found |
2288 | call get_FAT |
||
2643 | clevermous | 2289 | jnc @f |
2288 | clevermous | 2290 | .device_err: |
2291 | pop ecx |
||
2292 | .device_err2: |
||
2643 | clevermous | 2293 | pop esi |
2294 | push ERROR_DEVICE |
||
2288 | clevermous | 2295 | .ret_err: |
2296 | pop eax |
||
2297 | stc |
||
2298 | ret |
||
2299 | @@: |
||
2300 | cmp eax, 2 |
||
2301 | jb .fat_err |
||
2643 | clevermous | 2302 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 2303 | jb .last_loop |
2304 | .fat_err: |
||
2643 | clevermous | 2305 | pop ecx esi |
2288 | clevermous | 2306 | push ERROR_FAT_TABLE |
2307 | jmp .ret_err |
||
2308 | .last_found: |
||
2309 | push eax |
||
2310 | call get_FAT |
||
2643 | clevermous | 2311 | jnc @f |
2288 | clevermous | 2312 | pop eax |
2313 | jmp .device_err |
||
2314 | @@: |
||
2643 | clevermous | 2315 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 2316 | pop eax |
2317 | jb .fat_err |
||
2318 | ; set length to full number of clusters |
||
2319 | sub [edi+28], ecx |
||
2320 | .start_extend: |
||
2321 | pop ecx |
||
2322 | ; now do extend |
||
2323 | push edx |
||
2324 | mov edx, 2 ; start scan from cluster 2 |
||
2325 | .extend_loop: |
||
2326 | cmp [edi+28], ecx |
||
2327 | jae .extend_done |
||
2328 | ; add new cluster |
||
2329 | push eax |
||
2330 | call get_free_FAT |
||
2331 | jc .disk_full |
||
2643 | clevermous | 2332 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2333 | call set_FAT |
2334 | mov edx, eax |
||
2335 | pop eax |
||
2336 | test eax, eax |
||
2337 | jz .first_cluster |
||
2338 | push edx |
||
2339 | call set_FAT |
||
2340 | pop edx |
||
2341 | jmp @f |
||
2342 | .first_cluster: |
||
2343 | ror edx, 16 |
||
2344 | mov [edi+20], dx |
||
2345 | ror edx, 16 |
||
2346 | mov [edi+26], dx |
||
2347 | @@: |
||
2348 | push ecx |
||
2349 | mov ecx, -1 |
||
2350 | call add_disk_free_space |
||
2351 | pop ecx |
||
2352 | mov eax, edx |
||
2643 | clevermous | 2353 | add [edi+28], esi |
2288 | clevermous | 2354 | jmp .extend_loop |
2355 | .extend_done: |
||
2356 | mov [edi+28], ecx |
||
2643 | clevermous | 2357 | pop edx esi |
2288 | clevermous | 2358 | xor eax, eax ; CF=0 |
2359 | ret |
||
2360 | .device_err3: |
||
2361 | pop edx |
||
2362 | jmp .device_err2 |
||
2363 | .disk_full: |
||
2643 | clevermous | 2364 | pop eax edx esi |
2288 | clevermous | 2365 | push ERROR_DISK_FULL |
2366 | pop eax |
||
2367 | stc |
||
2368 | ret |
||
2369 | |||
2370 | ;---------------------------------------------------------------- |
||
2371 | ; |
||
2372 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
2373 | ; |
||
2643 | clevermous | 2374 | ; Obsolete, will be replaced with filesystem-specific functions. |
2375 | ; |
||
2288 | clevermous | 2376 | ; esi points to filename |
2377 | ; ebx points to 64-bit number = new file size |
||
2378 | ; ecx ignored (reserved) |
||
2379 | ; edx ignored (reserved) |
||
2380 | ; |
||
2381 | ; ret eax = 0 ok or other = errormsg |
||
2382 | ; |
||
2383 | ;-------------------------------------------------------------- |
||
2384 | fs_HdSetFileEnd: |
||
2643 | clevermous | 2385 | cmp [fs_type], 16 |
2386 | jz @f |
||
2387 | cmp [fs_type], 32 |
||
2388 | jz @f |
||
2288 | clevermous | 2389 | cmp [fs_type], 1 |
2390 | jz ntfs_HdSetFileEnd |
||
2391 | cmp [fs_type], 2 |
||
2392 | jz ext2_HdSetFileEnd |
||
2393 | push ERROR_UNKNOWN_FS |
||
2394 | pop eax |
||
2395 | ret |
||
2396 | @@: |
||
2643 | clevermous | 2397 | sub ebx, 4 |
2398 | push ebp |
||
2399 | mov ebp, [fs_dependent_data_start.partition] |
||
2400 | call fat_SetFileEnd |
||
2401 | pop ebp |
||
2402 | ret |
||
2403 | |||
2404 | ;---------------------------------------------------------------- |
||
2405 | ; fat_SetFileEnd - FAT16/32 implementation of setting end-of-file |
||
2406 | ; in: ebp = pointer to FAT structure |
||
2407 | ; in: esi+[esp+4] = name |
||
2408 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2409 | ; out: eax, ebx = return values for sysfunc 70 |
||
2410 | ;---------------------------------------------------------------- |
||
2411 | fat_SetFileEnd: |
||
2412 | call fat_lock |
||
2413 | push edi |
||
2288 | clevermous | 2414 | cmp byte [esi], 0 |
2415 | jnz @f |
||
2416 | .access_denied: |
||
2417 | push ERROR_ACCESS_DENIED |
||
2643 | clevermous | 2418 | .ret: |
2419 | call fat_unlock |
||
2420 | pop eax |
||
2421 | pop edi |
||
2422 | ret |
||
2288 | clevermous | 2423 | @@: |
2643 | clevermous | 2424 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 2425 | jnc @f |
2643 | clevermous | 2426 | .reteax: |
2427 | push eax |
||
2288 | clevermous | 2428 | jmp .ret |
2429 | @@: |
||
2430 | ; must not be directory |
||
2431 | test byte [edi+11], 10h |
||
2643 | clevermous | 2432 | jnz .access_denied |
2288 | clevermous | 2433 | ; file size must not exceed 4 Gb |
2643 | clevermous | 2434 | cmp dword [ebx+8], 0 |
2288 | clevermous | 2435 | jz @f |
2436 | push ERROR_END_OF_FILE |
||
2437 | jmp .ret |
||
2438 | @@: |
||
2439 | push eax ; save directory sector |
||
2440 | ; set file modification date/time to current |
||
2441 | call fat_update_datetime |
||
2643 | clevermous | 2442 | mov eax, [ebx+4] |
2288 | clevermous | 2443 | cmp eax, [edi+28] |
2444 | jb .truncate |
||
2445 | ja .expand |
||
2446 | pop eax |
||
2643 | clevermous | 2447 | lea ebx, [ebp+FAT.buffer] |
2448 | call fs_write32_sys |
||
2288 | clevermous | 2449 | pop edi |
2643 | clevermous | 2450 | test eax, eax |
2288 | clevermous | 2451 | jz @f |
2643 | clevermous | 2452 | push ERROR_DEVICE |
2453 | jmp .ret |
||
2288 | clevermous | 2454 | @@: |
2643 | clevermous | 2455 | push 0 |
2456 | jmp .ret |
||
2288 | clevermous | 2457 | .expand: |
2458 | push ebx ebp ecx |
||
2459 | push dword [edi+28] ; save old size |
||
2460 | mov ecx, eax |
||
2461 | call hd_extend_file |
||
2462 | push eax ; return code |
||
2463 | jnc .expand_ok |
||
2464 | cmp al, ERROR_DISK_FULL |
||
2465 | jz .disk_full |
||
2466 | .pop_ret: |
||
2467 | call update_disk |
||
2643 | clevermous | 2468 | pop eax ecx ecx ebp ebx ecx |
2469 | jmp .reteax |
||
2288 | clevermous | 2470 | .expand_ok: |
2471 | .disk_full: |
||
2472 | ; save directory |
||
2473 | mov eax, [edi+28] |
||
2474 | xchg eax, [esp+20] |
||
2643 | clevermous | 2475 | lea ebx, [ebp+FAT.buffer] |
2476 | call fs_write32_sys |
||
2477 | test eax, eax |
||
2288 | clevermous | 2478 | mov eax, [edi+20-2] |
2479 | mov ax, [edi+26] |
||
2480 | mov edi, eax |
||
2481 | jz @f |
||
2482 | .pop_ret11: |
||
2643 | clevermous | 2483 | mov byte [esp], ERROR_DEVICE |
2288 | clevermous | 2484 | jmp .pop_ret |
2485 | @@: |
||
2643 | clevermous | 2486 | test edi, edi |
2487 | jz .pop_ret |
||
2288 | clevermous | 2488 | ; now zero new data |
2643 | clevermous | 2489 | push 0 |
2490 | ; edi=current cluster, [esp]=sector in cluster |
||
2491 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
||
2288 | clevermous | 2492 | .zero_loop: |
2643 | clevermous | 2493 | cmp edi, 2 |
2494 | jb .error_fat |
||
2495 | cmp edi, [ebp+FAT.fatRESERVED] |
||
2496 | jae .error_fat |
||
2497 | sub dword [esp+8], 0x200 |
||
2288 | clevermous | 2498 | jae .next_cluster |
2499 | lea eax, [edi-2] |
||
2643 | clevermous | 2500 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2501 | add eax, [ebp+FAT.DATA_START] |
||
2502 | add eax, [esp] |
||
2503 | cmp dword [esp+8], -0x200 |
||
2288 | clevermous | 2504 | jz .noread |
2643 | clevermous | 2505 | push eax |
2506 | lea ebx, [ebp+FAT.buffer] |
||
2507 | call fs_read32_app |
||
2508 | test eax, eax |
||
2509 | pop eax |
||
2288 | clevermous | 2510 | jnz .err_next |
2511 | .noread: |
||
2643 | clevermous | 2512 | mov ecx, [esp+8] |
2288 | clevermous | 2513 | neg ecx |
2514 | push edi |
||
2643 | clevermous | 2515 | lea edi, [ebp+FAT.buffer+0x200] |
2516 | add edi, [esp+12] |
||
2288 | clevermous | 2517 | push eax |
2518 | xor eax, eax |
||
2643 | clevermous | 2519 | mov [esp+16], eax |
2288 | clevermous | 2520 | rep stosb |
2521 | pop eax |
||
2522 | pop edi |
||
2643 | clevermous | 2523 | call fs_write32_app |
2524 | test eax, eax |
||
2288 | clevermous | 2525 | jz .next_cluster |
2526 | .err_next: |
||
2643 | clevermous | 2527 | mov byte [esp+4], ERROR_DEVICE |
2288 | clevermous | 2528 | .next_cluster: |
2643 | clevermous | 2529 | pop eax |
2288 | clevermous | 2530 | sub dword [esp+20], 0x200 |
2531 | jbe .pop_ret |
||
2643 | clevermous | 2532 | inc eax |
2533 | push eax |
||
2534 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2535 | jb .zero_loop |
2643 | clevermous | 2536 | and dword [esp], 0 |
2288 | clevermous | 2537 | mov eax, edi |
2538 | call get_FAT |
||
2539 | mov edi, eax |
||
2643 | clevermous | 2540 | jnc .zero_loop |
2541 | pop eax |
||
2542 | jmp .pop_ret11 |
||
2288 | clevermous | 2543 | .truncate: |
2544 | mov [edi+28], eax |
||
2545 | push ecx |
||
2546 | mov ecx, [edi+20-2] |
||
2547 | mov cx, [edi+26] |
||
2548 | push eax |
||
2549 | test eax, eax |
||
2550 | jz .zero_size |
||
2551 | ; find new last cluster |
||
2552 | @@: |
||
2643 | clevermous | 2553 | cmp ecx, 2 |
2554 | jb .error_fat2 |
||
2555 | cmp ecx, [ebp+FAT.fatRESERVED] |
||
2556 | jae .error_fat2 |
||
2557 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2558 | shl eax, 9 |
2559 | sub [esp], eax |
||
2560 | jbe @f |
||
2561 | mov eax, ecx |
||
2562 | call get_FAT |
||
2563 | mov ecx, eax |
||
2643 | clevermous | 2564 | jnc @b |
2288 | clevermous | 2565 | .device_err3: |
2566 | pop eax ecx eax edi |
||
2643 | clevermous | 2567 | call update_disk |
2568 | call fat_unlock |
||
2569 | push ERROR_DEVICE |
||
2288 | clevermous | 2570 | pop eax |
2571 | ret |
||
2572 | @@: |
||
2573 | ; we will zero data at the end of last sector - remember it |
||
2574 | push ecx |
||
2575 | ; terminate FAT chain |
||
2576 | push edx |
||
2577 | mov eax, ecx |
||
2643 | clevermous | 2578 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2579 | call set_FAT |
2580 | mov eax, edx |
||
2581 | pop edx |
||
2643 | clevermous | 2582 | jnc @f |
2288 | clevermous | 2583 | .device_err4: |
2584 | pop ecx |
||
2585 | jmp .device_err3 |
||
2586 | .zero_size: |
||
2587 | and word [edi+20], 0 |
||
2588 | and word [edi+26], 0 |
||
2589 | push 0 |
||
2590 | mov eax, ecx |
||
2591 | @@: |
||
2592 | ; delete FAT chain |
||
2593 | call clear_cluster_chain |
||
2643 | clevermous | 2594 | jc .device_err4 |
2288 | clevermous | 2595 | ; save directory |
2596 | mov eax, [esp+12] |
||
2597 | push ebx |
||
2643 | clevermous | 2598 | lea ebx, [ebp+FAT.buffer] |
2599 | call fs_write32_sys |
||
2288 | clevermous | 2600 | pop ebx |
2643 | clevermous | 2601 | test eax, eax |
2288 | clevermous | 2602 | jnz .device_err4 |
2603 | ; zero last sector, ignore errors |
||
2604 | pop ecx |
||
2605 | pop eax |
||
2606 | dec ecx |
||
2643 | clevermous | 2607 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2608 | add ecx, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 2609 | push eax |
2610 | sar eax, 9 |
||
2611 | add ecx, eax |
||
2612 | pop eax |
||
2613 | and eax, 0x1FF |
||
2614 | jz .truncate_done |
||
2615 | push ebx eax |
||
2616 | mov eax, ecx |
||
2643 | clevermous | 2617 | lea ebx, [ebp+FAT.buffer] |
2618 | call fs_read32_app |
||
2288 | clevermous | 2619 | pop eax |
2643 | clevermous | 2620 | lea edi, [ebp+FAT.buffer+eax] |
2288 | clevermous | 2621 | push ecx |
2622 | mov ecx, 0x200 |
||
2623 | sub ecx, eax |
||
2624 | xor eax, eax |
||
2625 | rep stosb |
||
2626 | pop eax |
||
2643 | clevermous | 2627 | call fs_write32_app |
2288 | clevermous | 2628 | pop ebx |
2629 | .truncate_done: |
||
2630 | pop ecx eax edi |
||
2631 | call update_disk |
||
2643 | clevermous | 2632 | call fat_unlock |
2288 | clevermous | 2633 | xor eax, eax |
2634 | ret |
||
2643 | clevermous | 2635 | .error_fat: |
2636 | pop eax |
||
2637 | mov byte [esp], ERROR_FAT_TABLE |
||
2638 | jmp .pop_ret |
||
2639 | .error_fat2: |
||
2640 | pop eax ecx eax edi |
||
2641 | call update_disk |
||
2642 | call fat_unlock |
||
2643 | push ERROR_FAT_TABLE |
||
2644 | pop eax |
||
2645 | ret |
||
2288 | clevermous | 2646 | |
2647 | fs_HdGetFileInfo: |
||
2643 | clevermous | 2648 | cmp [fs_type], 16 |
2649 | jz @f |
||
2650 | cmp [fs_type], 32 |
||
2651 | jz @f |
||
2288 | clevermous | 2652 | cmp [fs_type], 1 |
2653 | jz ntfs_HdGetFileInfo |
||
2654 | cmp [fs_type], 2 |
||
2655 | jz ext2_HdGetFileInfo |
||
2656 | mov eax, ERROR_UNKNOWN_FS |
||
2657 | ret |
||
2658 | @@: |
||
2643 | clevermous | 2659 | sub ebx, 4 |
2660 | push ebp |
||
2661 | mov ebp, [fs_dependent_data_start.partition] |
||
2662 | call fat_GetFileInfo |
||
2663 | pop ebp |
||
2664 | ret |
||
2665 | |||
2666 | ;---------------------------------------------------------------- |
||
2667 | ; fat_GetFileInfo - FAT16/32 implementation of getting file info |
||
2668 | ; in: ebp = pointer to FAT structure |
||
2669 | ; in: esi+[esp+4] = name |
||
2670 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2671 | ; out: eax, ebx = return values for sysfunc 70 |
||
2672 | ;---------------------------------------------------------------- |
||
2673 | fat_GetFileInfo: |
||
2288 | clevermous | 2674 | cmp byte [esi], 0 |
2675 | jnz @f |
||
2676 | mov eax, 2 |
||
2677 | ret |
||
2678 | @@: |
||
2679 | push edi |
||
2643 | clevermous | 2680 | call fat_lock |
2681 | stdcall hd_find_lfn, [esp+4+4] |
||
2682 | jc .error |
||
2683 | push ebp |
||
2684 | xor ebp, ebp |
||
2685 | mov esi, [ebx+16] |
||
2686 | mov dword [esi+4], ebp |
||
2687 | call fat_entry_to_bdfe2 |
||
2688 | pop ebp |
||
2689 | call fat_unlock |
||
2690 | xor eax, eax |
||
2288 | clevermous | 2691 | pop edi |
2692 | ret |
||
2643 | clevermous | 2693 | .error: |
2694 | push eax |
||
2695 | call fat_unlock |
||
2696 | pop eax |
||
2697 | pop edi |
||
2698 | ret |
||
2288 | clevermous | 2699 | |
2700 | fs_HdSetFileInfo: |
||
2643 | clevermous | 2701 | cmp [fs_type], 16 |
2702 | jz @f |
||
2703 | cmp [fs_type], 32 |
||
2704 | jz @f |
||
2288 | clevermous | 2705 | cmp [fs_type], 1 |
2706 | jz ntfs_HdSetFileInfo |
||
2707 | cmp [fs_type], 2 |
||
2708 | jz ext2_HdSetFileInfo |
||
2709 | mov eax, ERROR_UNKNOWN_FS |
||
2710 | ret |
||
2711 | @@: |
||
2643 | clevermous | 2712 | sub ebx, 4 |
2713 | push ebp |
||
2714 | mov ebp, [fs_dependent_data_start.partition] |
||
2715 | call fat_SetFileInfo |
||
2716 | pop ebp |
||
2717 | ret |
||
2718 | |||
2719 | ;---------------------------------------------------------------- |
||
2720 | ; fat_SetFileInfo - FAT16/32 implementation of setting file info |
||
2721 | ; in: ebp = pointer to FAT structure |
||
2722 | ; in: esi+[esp+4] = name |
||
2723 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2724 | ; out: eax, ebx = return values for sysfunc 70 |
||
2725 | ;---------------------------------------------------------------- |
||
2726 | fat_SetFileInfo: |
||
2288 | clevermous | 2727 | cmp byte [esi], 0 |
2728 | jnz @f |
||
2729 | mov eax, 2 |
||
2730 | ret |
||
2731 | @@: |
||
2732 | push edi |
||
2643 | clevermous | 2733 | call fat_lock |
2734 | stdcall hd_find_lfn, [esp+4+4] |
||
2735 | jc .error |
||
2288 | clevermous | 2736 | push eax |
2643 | clevermous | 2737 | mov edx, [ebx+16] |
2288 | clevermous | 2738 | call bdfe_to_fat_entry |
2739 | pop eax |
||
2643 | clevermous | 2740 | lea ebx, [ebp+FAT.buffer] |
2741 | call fs_write32_sys |
||
2288 | clevermous | 2742 | call update_disk |
2643 | clevermous | 2743 | call fat_unlock |
2288 | clevermous | 2744 | pop edi |
2745 | xor eax, eax |
||
2746 | ret |
||
2643 | clevermous | 2747 | .error: |
2748 | push eax |
||
2749 | call fat_unlock |
||
2750 | pop eax |
||
2751 | pop edi |
||
2752 | ret |
||
2288 | clevermous | 2753 | |
2754 | ;---------------------------------------------------------------- |
||
2755 | ; |
||
2756 | ; fs_HdDelete - delete file or empty folder from hard disk |
||
2757 | ; |
||
2643 | clevermous | 2758 | ; Obsolete, will be replaced with filesystem-specific functions. |
2759 | ; |
||
2288 | clevermous | 2760 | ; esi points to filename |
2761 | ; |
||
2762 | ; ret eax = 0 ok or other = errormsg |
||
2763 | ; |
||
2764 | ;-------------------------------------------------------------- |
||
2765 | fs_HdDelete: |
||
2643 | clevermous | 2766 | cmp [fs_type], 16 |
2767 | jz @f |
||
2768 | cmp [fs_type], 32 |
||
2769 | jz @f |
||
2288 | clevermous | 2770 | cmp [fs_type], 1 |
2771 | jz ntfs_HdDelete |
||
2772 | cmp [fs_type], 2 |
||
2773 | jz ext2_HdDelete |
||
2774 | push ERROR_UNKNOWN_FS |
||
2775 | pop eax |
||
2776 | ret |
||
2777 | @@: |
||
2643 | clevermous | 2778 | sub ebx, 4 |
2779 | push ebp |
||
2780 | mov ebp, [fs_dependent_data_start.partition] |
||
2781 | call fat_Delete |
||
2782 | pop ebp |
||
2783 | ret |
||
2784 | |||
2785 | ;---------------------------------------------------------------- |
||
2786 | ; fat_Delete - FAT16/32 implementation of deleting a file/folder |
||
2787 | ; in: ebp = pointer to FAT structure |
||
2788 | ; in: esi+[esp+4] = name |
||
2789 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2790 | ; out: eax, ebx = return values for sysfunc 70 |
||
2791 | ;---------------------------------------------------------------- |
||
2792 | fat_Delete: |
||
2793 | call fat_lock |
||
2288 | clevermous | 2794 | cmp byte [esi], 0 |
2795 | jnz @f |
||
2796 | ; cannot delete root! |
||
2797 | .access_denied: |
||
2798 | push ERROR_ACCESS_DENIED |
||
2643 | clevermous | 2799 | .pop_ret: |
2800 | call fat_unlock |
||
2801 | pop eax |
||
2802 | xor ebx, ebx |
||
2803 | ret |
||
2288 | clevermous | 2804 | @@: |
2643 | clevermous | 2805 | and [ebp+FAT.longname_sec1], 0 |
2806 | and [ebp+FAT.longname_sec2], 0 |
||
2288 | clevermous | 2807 | push edi |
2643 | clevermous | 2808 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 2809 | jnc .found |
2810 | pop edi |
||
2811 | push ERROR_FILE_NOT_FOUND |
||
2812 | jmp .pop_ret |
||
2813 | .found: |
||
2814 | cmp dword [edi], '. ' |
||
2815 | jz .access_denied2 |
||
2816 | cmp dword [edi], '.. ' |
||
2817 | jz .access_denied2 |
||
2818 | test byte [edi+11], 10h |
||
2819 | jz .dodel |
||
2820 | ; we can delete only empty folders! |
||
2821 | pushad |
||
2643 | clevermous | 2822 | mov esi, [edi+20-2] |
2823 | mov si, [edi+26] |
||
2288 | clevermous | 2824 | xor ecx, ecx |
2643 | clevermous | 2825 | lea eax, [esi-2] |
2826 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2827 | add eax, [ebp+FAT.DATA_START] |
||
2828 | lea ebx, [ebp+FAT.buffer] |
||
2829 | call fs_read32_sys |
||
2830 | test eax, eax |
||
2288 | clevermous | 2831 | jnz .err1 |
2643 | clevermous | 2832 | lea eax, [ebx+0x200] |
2288 | clevermous | 2833 | add ebx, 2*0x20 |
2834 | .checkempty: |
||
2835 | cmp byte [ebx], 0 |
||
2836 | jz .empty |
||
2837 | cmp byte [ebx], 0xE5 |
||
2838 | jnz .notempty |
||
2839 | add ebx, 0x20 |
||
2643 | clevermous | 2840 | cmp ebx, eax |
2288 | clevermous | 2841 | jb .checkempty |
2842 | inc ecx |
||
2643 | clevermous | 2843 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2844 | jb @f |
2643 | clevermous | 2845 | mov eax, esi |
2288 | clevermous | 2846 | call get_FAT |
2643 | clevermous | 2847 | jc .err1 |
3174 | clevermous | 2848 | cmp eax, 2 |
2849 | jb .error_fat |
||
2850 | cmp eax, [ebp+FAT.fatRESERVED] |
||
2851 | jae .empty |
||
2643 | clevermous | 2852 | mov esi, eax |
2288 | clevermous | 2853 | xor ecx, ecx |
2854 | @@: |
||
2643 | clevermous | 2855 | lea eax, [esi-2] |
2856 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2857 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 2858 | add eax, ecx |
2643 | clevermous | 2859 | lea ebx, [ebp+FAT.buffer] |
2860 | call fs_read32_sys |
||
2861 | test eax, eax |
||
2862 | lea eax, [ebx+0x200] |
||
2288 | clevermous | 2863 | jz .checkempty |
2864 | .err1: |
||
2865 | popad |
||
2866 | .err2: |
||
2867 | pop edi |
||
2643 | clevermous | 2868 | call fat_unlock |
2869 | push ERROR_DEVICE |
||
2288 | clevermous | 2870 | pop eax |
2871 | ret |
||
3174 | clevermous | 2872 | .error_fat: |
2873 | popad |
||
2874 | pop edi |
||
2875 | call fat_unlock |
||
2876 | push ERROR_FAT_TABLE |
||
2877 | pop eax |
||
2878 | ret |
||
2288 | clevermous | 2879 | .notempty: |
2880 | popad |
||
2881 | .access_denied2: |
||
2882 | pop edi |
||
2643 | clevermous | 2883 | call fat_unlock |
2288 | clevermous | 2884 | push ERROR_ACCESS_DENIED |
2885 | pop eax |
||
2886 | ret |
||
2887 | .empty: |
||
2888 | popad |
||
2643 | clevermous | 2889 | push eax ebx |
2890 | lea ebx, [ebp+FAT.buffer] |
||
2891 | call fs_read32_sys |
||
2892 | test eax, eax |
||
2893 | pop ebx eax |
||
2288 | clevermous | 2894 | jnz .err2 |
2895 | .dodel: |
||
2896 | push eax |
||
2897 | mov eax, [edi+20-2] |
||
2898 | mov ax, [edi+26] |
||
2899 | xchg eax, [esp] |
||
2900 | ; delete folder entry |
||
2901 | mov byte [edi], 0xE5 |
||
2902 | ; delete LFN (if present) |
||
2903 | .lfndel: |
||
2643 | clevermous | 2904 | lea edx, [ebp+FAT.buffer] |
2905 | cmp edi, edx |
||
2288 | clevermous | 2906 | ja @f |
2643 | clevermous | 2907 | cmp [ebp+FAT.longname_sec2], 0 |
2288 | clevermous | 2908 | jz .lfndone |
2643 | clevermous | 2909 | push [ebp+FAT.longname_sec2] |
2910 | push [ebp+FAT.longname_sec1] |
||
2911 | pop [ebp+FAT.longname_sec2] |
||
2912 | and [ebp+FAT.longname_sec1], 0 |
||
2288 | clevermous | 2913 | push ebx |
2643 | clevermous | 2914 | mov ebx, edx |
2915 | call fs_write32_sys |
||
2288 | clevermous | 2916 | mov eax, [esp+4] |
2643 | clevermous | 2917 | call fs_read32_sys |
2288 | clevermous | 2918 | pop ebx |
2919 | pop eax |
||
2643 | clevermous | 2920 | lea edi, [ebp+FAT.buffer+0x200] |
2288 | clevermous | 2921 | @@: |
2922 | sub edi, 0x20 |
||
2923 | cmp byte [edi], 0xE5 |
||
2924 | jz .lfndone |
||
2925 | cmp byte [edi+11], 0xF |
||
2926 | jnz .lfndone |
||
2927 | mov byte [edi], 0xE5 |
||
2928 | jmp .lfndel |
||
2929 | .lfndone: |
||
2930 | push ebx |
||
2643 | clevermous | 2931 | lea ebx, [ebp+FAT.buffer] |
2932 | call fs_write32_sys |
||
2288 | clevermous | 2933 | pop ebx |
2934 | ; delete FAT chain |
||
2935 | pop eax |
||
2936 | call clear_cluster_chain |
||
2937 | call update_disk |
||
2643 | clevermous | 2938 | call fat_unlock |
2288 | clevermous | 2939 | pop edi |
2940 | xor eax, eax |
||
2941 | ret |
||
2942 | |||
2943 | ; \end{diamond}=>=>=>=>65536 |