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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: 3598 $ |
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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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3598 | clevermous | 170 | movi eax, sizeof.FAT |
2643 | clevermous | 171 | call malloc |
172 | pop ebx |
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173 | test eax, eax |
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174 | jz .return0 |
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175 | mov ecx, [ebp+8] |
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176 | mov dword [eax+FAT.p.FirstSector], ecx |
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177 | mov ecx, [ebp+12] |
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178 | mov dword [eax+FAT.p.FirstSector+4], ecx |
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179 | mov ecx, [ebp+16] |
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180 | mov dword [eax+FAT.p.Length], ecx |
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181 | mov ecx, [ebp+20] |
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182 | mov dword [eax+FAT.p.Length+4], ecx |
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183 | mov [eax+FAT.p.Disk], esi |
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184 | mov [eax+FAT.p.FSUserFunctions], fat_user_functions |
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185 | or [eax+FAT.fat_in_cache], -1 |
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186 | mov [eax+FAT.fat_change], 0 |
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187 | push ebp |
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188 | mov ebp, eax |
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2288 | clevermous | 189 | |
2643 | clevermous | 190 | lea ecx, [ebp+FAT.Lock] |
191 | call mutex_init |
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2288 | clevermous | 192 | |
2643 | clevermous | 193 | movzx eax, word [ebx+0xe] ; sectors reserved |
194 | mov [ebp+FAT.FAT_START], eax |
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2288 | clevermous | 195 | |
2643 | clevermous | 196 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
197 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
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2288 | clevermous | 198 | |
2643 | clevermous | 199 | movzx ecx, word [ebx+0xb] ; bytes per sector |
200 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
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2288 | clevermous | 201 | |
2643 | clevermous | 202 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
203 | shl eax, 5 ; mul 32 |
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204 | dec ecx |
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205 | add eax, ecx ; round up if not equal count |
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206 | inc ecx ; bytes per sector |
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207 | xor edx, edx |
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208 | div ecx |
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209 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
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2288 | clevermous | 210 | |
2643 | clevermous | 211 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
212 | test eax, eax |
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213 | jnz @f |
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214 | mov eax, [ebx+0x24] ; sectors per fat |
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2288 | clevermous | 215 | @@: |
2643 | clevermous | 216 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
217 | |||
218 | movzx eax, byte [ebx+0x10] ; number of fats |
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219 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
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220 | imul eax, [ebp+FAT.SECTORS_PER_FAT] |
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221 | add eax, [ebp+FAT.FAT_START] |
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222 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
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223 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
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224 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
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225 | |||
226 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
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227 | test eax, eax |
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228 | jnz @f |
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229 | mov eax, [ebx+0x20] ; total sector count |
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230 | @@: |
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231 | mov dword [ebp+FAT.p.Length], eax |
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232 | and dword [ebp+FAT.p.Length+4], 0 |
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233 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
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234 | xor edx, edx |
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235 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
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236 | inc eax |
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237 | mov [ebp+FAT.LAST_CLUSTER], eax |
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238 | dec eax ; cluster count |
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239 | mov [ebp+FAT.fatStartScan], 2 |
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240 | |||
241 | ; limits by Microsoft Hardware White Paper v1.03 |
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242 | cmp eax, 4085 ; 0xff5 |
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243 | jb .free_return0 ; fat12 not supported |
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244 | cmp eax, 65525 ; 0xfff5 |
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245 | jb .fat16 |
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246 | .fat32: |
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247 | mov eax, [ebx+0x2c] ; rootdir cluster |
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248 | mov [ebp+FAT.ROOT_CLUSTER], eax |
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249 | movzx eax, word [ebx+0x30] |
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250 | mov [ebp+FAT.ADR_FSINFO], eax |
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251 | push ebx |
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252 | add ebx, 512 |
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253 | call fs_read32_sys |
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254 | test eax, eax |
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255 | jnz @f |
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256 | mov eax, [ebx+0x1ec] |
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257 | cmp eax, -1 |
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2288 | clevermous | 258 | jz @f |
2643 | clevermous | 259 | mov [ebp+FAT.fatStartScan], eax |
2288 | clevermous | 260 | @@: |
2643 | clevermous | 261 | pop ebx |
262 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
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263 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
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264 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
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265 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
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266 | mov al, 32 |
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267 | mov [fs_type], al |
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268 | mov [ebp+FAT.fs_type], al |
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269 | mov eax, ebp |
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270 | pop ebp |
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2288 | clevermous | 271 | ret |
2643 | clevermous | 272 | .fat16: |
273 | and [ebp+FAT.ROOT_CLUSTER], 0 |
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274 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
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275 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
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276 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
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277 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
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278 | mov al, 16 |
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279 | mov [fs_type], al |
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280 | mov [ebp+FAT.fs_type], al |
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281 | mov eax, ebp |
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282 | pop ebp |
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2288 | clevermous | 283 | ret |
284 | |||
285 | set_FAT: |
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286 | ;-------------------------------- |
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287 | ; input : EAX = cluster |
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288 | ; EDX = value to save |
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2643 | clevermous | 289 | ; EBP = pointer to FAT structure |
2288 | clevermous | 290 | ; output : EDX = old value |
291 | ;-------------------------------- |
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2643 | clevermous | 292 | ; out: CF set <=> error |
2288 | clevermous | 293 | push eax ebx esi |
294 | |||
295 | cmp eax, 2 |
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296 | jb sfc_error |
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2643 | clevermous | 297 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
2288 | clevermous | 298 | ja sfc_error |
2643 | clevermous | 299 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 300 | je sfc_1 |
301 | add eax, eax |
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302 | sfc_1: |
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303 | add eax, eax |
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304 | mov esi, 511 |
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305 | and esi, eax ; esi = position in fat sector |
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306 | shr eax, 9 ; eax = fat sector |
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2643 | clevermous | 307 | add eax, [ebp+FAT.FAT_START] |
308 | lea ebx, [ebp+FAT.fat_cache] |
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2288 | clevermous | 309 | |
2643 | clevermous | 310 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
2288 | clevermous | 311 | je sfc_in_cache ; yes |
312 | |||
2643 | clevermous | 313 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
2288 | clevermous | 314 | je sfc_no_change ; no |
315 | call write_fat_sector; yes. write it into disk |
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2643 | clevermous | 316 | jc sfc_error |
2288 | clevermous | 317 | |
318 | sfc_no_change: |
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2643 | clevermous | 319 | mov [ebp+FAT.fat_in_cache], eax; save fat sector |
320 | call fs_read32_sys |
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321 | test eax, eax |
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2288 | clevermous | 322 | jne sfc_error |
323 | |||
324 | |||
325 | sfc_in_cache: |
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2643 | clevermous | 326 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 327 | jne sfc_test32 |
328 | |||
329 | sfc_set16: |
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330 | xchg [ebx+esi], dx ; save new value and get old value |
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331 | jmp sfc_write |
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332 | |||
333 | sfc_test32: |
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2643 | clevermous | 334 | mov eax, [ebp+FAT.fatMASK] |
2288 | clevermous | 335 | |
336 | sfc_set32: |
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337 | and edx, eax |
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338 | xor eax, -1 ; mask for high bits |
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339 | and eax, [ebx+esi] ; get high 4 bits |
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340 | or eax, edx |
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341 | mov edx, [ebx+esi] ; get old value |
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342 | mov [ebx+esi], eax ; save new value |
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343 | |||
344 | sfc_write: |
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2643 | clevermous | 345 | mov [ebp+FAT.fat_change], 1; fat has changed |
2288 | clevermous | 346 | |
347 | sfc_nonzero: |
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2643 | clevermous | 348 | and edx, [ebp+FAT.fatMASK] |
2288 | clevermous | 349 | |
2643 | clevermous | 350 | sfc_return: |
2288 | clevermous | 351 | pop esi ebx eax |
352 | ret |
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2643 | clevermous | 353 | sfc_error: |
354 | stc |
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355 | jmp sfc_return |
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2288 | clevermous | 356 | |
357 | |||
358 | get_FAT: |
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359 | ;-------------------------------- |
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360 | ; input : EAX = cluster |
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2643 | clevermous | 361 | ; EBP = pointer to FAT structure |
2288 | clevermous | 362 | ; output : EAX = next cluster |
363 | ;-------------------------------- |
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2643 | clevermous | 364 | ; out: CF set <=> error |
2288 | clevermous | 365 | push ebx esi |
366 | |||
2643 | clevermous | 367 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 368 | je gfc_1 |
369 | add eax, eax |
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370 | gfc_1: |
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371 | add eax, eax |
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372 | mov esi, 511 |
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373 | and esi, eax ; esi = position in fat sector |
||
374 | shr eax, 9 ; eax = fat sector |
||
2643 | clevermous | 375 | add eax, [ebp+FAT.FAT_START] |
376 | lea ebx, [ebp+FAT.fat_cache] |
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2288 | clevermous | 377 | |
2643 | clevermous | 378 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
2288 | clevermous | 379 | je gfc_in_cache |
380 | |||
2643 | clevermous | 381 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
2288 | clevermous | 382 | je gfc_no_change ; no |
383 | call write_fat_sector; yes. write it into disk |
||
2643 | clevermous | 384 | jc hd_error_01 |
2288 | clevermous | 385 | |
386 | gfc_no_change: |
||
2643 | clevermous | 387 | mov [ebp+FAT.fat_in_cache], eax |
388 | call fs_read32_sys |
||
389 | test eax, eax |
||
2288 | clevermous | 390 | jne hd_error_01 |
391 | |||
392 | gfc_in_cache: |
||
393 | mov eax, [ebx+esi] |
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2643 | clevermous | 394 | and eax, [ebp+FAT.fatMASK] |
395 | gfc_return: |
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2288 | clevermous | 396 | pop esi ebx |
397 | ret |
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2643 | clevermous | 398 | hd_error_01: |
399 | stc |
||
400 | jmp gfc_return |
||
2288 | clevermous | 401 | |
402 | |||
403 | get_free_FAT: |
||
404 | ;----------------------------------------------------------- |
||
405 | ; output : if CARRY=0 EAX = # first cluster found free |
||
406 | ; if CARRY=1 disk full |
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407 | ; Note : for more speed need to use fat_cache directly |
||
408 | ;----------------------------------------------------------- |
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409 | push ecx |
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2643 | clevermous | 410 | mov ecx, [ebp+FAT.LAST_CLUSTER]; counter for full disk |
2288 | clevermous | 411 | sub ecx, 2 |
2643 | clevermous | 412 | mov eax, [ebp+FAT.fatStartScan] |
2288 | clevermous | 413 | cmp eax, 2 |
414 | jb gff_reset |
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415 | |||
416 | gff_test: |
||
2643 | clevermous | 417 | cmp eax, [ebp+FAT.LAST_CLUSTER]; if above last cluster start at cluster 2 |
2288 | clevermous | 418 | jbe gff_in_range |
419 | gff_reset: |
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420 | mov eax, 2 |
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421 | |||
422 | gff_in_range: |
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423 | push eax |
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424 | call get_FAT ; get cluster state |
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2643 | clevermous | 425 | jc gff_not_found_1 |
2288 | clevermous | 426 | |
427 | test eax, eax ; is it free? |
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428 | pop eax |
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429 | je gff_found ; yes |
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430 | inc eax ; next cluster |
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431 | dec ecx ; is all checked? |
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432 | jns gff_test ; no |
||
433 | |||
434 | gff_not_found: |
||
435 | pop ecx ; yes. disk is full |
||
436 | stc |
||
437 | ret |
||
438 | |||
2643 | clevermous | 439 | gff_not_found_1: |
440 | pop eax |
||
441 | jmp gff_not_found |
||
442 | |||
2288 | clevermous | 443 | gff_found: |
444 | lea ecx, [eax+1] |
||
2643 | clevermous | 445 | mov [ebp+FAT.fatStartScan], ecx |
2288 | clevermous | 446 | pop ecx |
447 | clc |
||
448 | ret |
||
449 | |||
450 | |||
451 | write_fat_sector: |
||
452 | ;----------------------------------------------------------- |
||
453 | ; write changed fat to disk |
||
454 | ;----------------------------------------------------------- |
||
455 | push eax ebx ecx |
||
456 | |||
2643 | clevermous | 457 | mov [ebp+FAT.fat_change], 0 |
458 | mov eax, [ebp+FAT.fat_in_cache] |
||
2288 | clevermous | 459 | cmp eax, -1 |
460 | jz write_fat_not_used |
||
2643 | clevermous | 461 | lea ebx, [ebp+FAT.fat_cache] |
462 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
||
2288 | clevermous | 463 | |
464 | write_next_fat: |
||
2643 | clevermous | 465 | push eax |
466 | call fs_write32_sys |
||
467 | test eax, eax |
||
468 | pop eax |
||
469 | jnz write_fat_not_used |
||
2288 | clevermous | 470 | |
2643 | clevermous | 471 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
2288 | clevermous | 472 | dec ecx |
473 | jnz write_next_fat |
||
474 | |||
475 | write_fat_not_used: |
||
476 | pop ecx ebx eax |
||
477 | ret |
||
478 | |||
479 | |||
480 | |||
481 | |||
482 | |||
483 | bcd2bin: |
||
484 | ;---------------------------------- |
||
485 | ; input : AL=BCD number (eg. 0x11) |
||
486 | ; output : AH=0 |
||
487 | ; AL=decimal number (eg. 11) |
||
488 | ;---------------------------------- |
||
489 | xor ah, ah |
||
490 | shl ax, 4 |
||
491 | shr al, 4 |
||
492 | aad |
||
493 | ret |
||
494 | |||
495 | |||
496 | get_date_for_file: |
||
497 | ;----------------------------------------------------- |
||
498 | ; Get date from CMOS and pack day,month,year in AX |
||
499 | ; DATE bits 0..4 : day of month 0..31 |
||
500 | ; 5..8 : month of year 1..12 |
||
501 | ; 9..15 : count of years from 1980 |
||
502 | ;----------------------------------------------------- |
||
503 | mov al, 0x7 ;day |
||
504 | out 0x70, al |
||
505 | in al, 0x71 |
||
506 | call bcd2bin |
||
507 | ror eax, 5 |
||
508 | |||
509 | mov al, 0x8 ;month |
||
510 | out 0x70, al |
||
511 | in al, 0x71 |
||
512 | call bcd2bin |
||
513 | ror eax, 4 |
||
514 | |||
515 | mov al, 0x9 ;year |
||
516 | out 0x70, al |
||
517 | in al, 0x71 |
||
518 | call bcd2bin |
||
519 | add ax, 20 ;because CMOS return only the two last |
||
520 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
521 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
||
522 | ret |
||
523 | |||
524 | |||
525 | get_time_for_file: |
||
526 | ;----------------------------------------------------- |
||
527 | ; Get time from CMOS and pack hour,minute,second in AX |
||
528 | ; TIME bits 0..4 : second (the low bit is lost) |
||
529 | ; 5..10 : minute 0..59 |
||
530 | ; 11..15 : hour 0..23 |
||
531 | ;----------------------------------------------------- |
||
532 | mov al, 0x0 ;second |
||
533 | out 0x70, al |
||
534 | in al, 0x71 |
||
535 | call bcd2bin |
||
536 | ror eax, 6 |
||
537 | |||
538 | mov al, 0x2 ;minute |
||
539 | out 0x70, al |
||
540 | in al, 0x71 |
||
541 | call bcd2bin |
||
542 | ror eax, 6 |
||
543 | |||
544 | mov al, 0x4 ;hour |
||
545 | out 0x70, al |
||
546 | in al, 0x71 |
||
547 | call bcd2bin |
||
548 | rol eax, 11 |
||
549 | ret |
||
550 | |||
551 | |||
552 | set_current_time_for_entry: |
||
553 | ;----------------------------------------------------- |
||
554 | ; Set current time/date for file entry |
||
555 | ; input : ebx = file entry pointer |
||
556 | ;----------------------------------------------------- |
||
557 | push eax |
||
558 | call get_time_for_file; update files date/time |
||
559 | mov [ebx+22], ax |
||
560 | call get_date_for_file |
||
561 | mov [ebx+24], ax |
||
562 | pop eax |
||
563 | ret |
||
564 | |||
565 | |||
566 | |||
567 | add_disk_free_space: |
||
568 | ;----------------------------------------------------- |
||
569 | ; input : ecx = cluster count |
||
570 | ; Note : negative = remove clusters from free space |
||
571 | ; positive = add clusters to free space |
||
572 | ;----------------------------------------------------- |
||
573 | test ecx, ecx ; no change |
||
574 | je add_dfs_no |
||
2643 | clevermous | 575 | cmp [ebp+FAT.fs_type], 32 ; free disk space only used by fat32 |
2288 | clevermous | 576 | jne add_dfs_no |
577 | |||
578 | push eax ebx |
||
2643 | clevermous | 579 | mov eax, [ebp+FAT.ADR_FSINFO] |
580 | lea ebx, [ebp+FAT.fsinfo_buffer] |
||
581 | call fs_read32_sys |
||
582 | test eax, eax |
||
583 | jnz add_not_fs |
||
2288 | clevermous | 584 | |
585 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
||
586 | jne add_not_fs |
||
587 | |||
588 | add [ebx+0x1e8], ecx |
||
2643 | clevermous | 589 | push [ebp+FAT.fatStartScan] |
2288 | clevermous | 590 | pop dword [ebx+0x1ec] |
2643 | clevermous | 591 | mov eax, [ebp+FAT.ADR_FSINFO] |
592 | call fs_write32_sys |
||
593 | ; jc add_not_fs |
||
2288 | clevermous | 594 | |
595 | add_not_fs: |
||
596 | pop ebx eax |
||
597 | |||
598 | add_dfs_no: |
||
599 | ret |
||
600 | |||
601 | |||
602 | |||
603 | clear_cluster_chain: |
||
604 | ;----------------------------------------------------- |
||
605 | ; input : eax = first cluster |
||
606 | ;----------------------------------------------------- |
||
607 | push eax ecx edx |
||
608 | xor ecx, ecx ; cluster count |
||
609 | |||
610 | clean_new_chain: |
||
2643 | clevermous | 611 | cmp eax, [ebp+FAT.LAST_CLUSTER]; end of file |
2288 | clevermous | 612 | ja delete_OK |
613 | cmp eax, 2 ; unfinished fat chain or zero length file |
||
614 | jb delete_OK |
||
2643 | clevermous | 615 | cmp eax, [ebp+FAT.ROOT_CLUSTER]; don't remove root cluster |
2288 | clevermous | 616 | jz delete_OK |
617 | |||
618 | xor edx, edx |
||
619 | call set_FAT ; clear fat entry |
||
2643 | clevermous | 620 | jc access_denied_01 |
2288 | clevermous | 621 | |
622 | inc ecx ; update cluster count |
||
623 | mov eax, edx ; old cluster |
||
624 | jmp clean_new_chain |
||
625 | |||
626 | delete_OK: |
||
627 | call add_disk_free_space; add clusters to free disk space |
||
2643 | clevermous | 628 | clc |
2288 | clevermous | 629 | access_denied_01: |
630 | pop edx ecx eax |
||
631 | ret |
||
632 | |||
633 | |||
2643 | clevermous | 634 | if 0 |
2288 | clevermous | 635 | get_hd_info: |
636 | ;----------------------------------------------------------- |
||
637 | ; output : eax = 0 - ok |
||
638 | ; 3 - unknown FS |
||
639 | ; 10 - access denied |
||
640 | ; edx = cluster size in bytes |
||
641 | ; ebx = total clusters on disk |
||
642 | ; ecx = free clusters on disk |
||
643 | ;----------------------------------------------------------- |
||
2643 | clevermous | 644 | cmp [ebp+FAT.fs_type], 16 |
2288 | clevermous | 645 | jz info_fat_ok |
2643 | clevermous | 646 | cmp [ebp+FAT.fs_type], 32 |
2288 | clevermous | 647 | jz info_fat_ok |
648 | xor edx, edx |
||
649 | xor ebx, ebx |
||
650 | xor ecx, ecx |
||
651 | mov eax, ERROR_UNKNOWN_FS |
||
652 | ret |
||
653 | |||
654 | info_fat_ok: |
||
655 | ; call reserve_hd1 |
||
656 | |||
657 | xor ecx, ecx ; count of free clusters |
||
658 | mov eax, 2 |
||
2643 | clevermous | 659 | mov ebx, [ebp+FAT.LAST_CLUSTER] |
2288 | clevermous | 660 | |
661 | info_cluster: |
||
662 | push eax |
||
663 | call get_FAT ; get cluster info |
||
2643 | clevermous | 664 | jc info_access_denied |
2288 | clevermous | 665 | |
666 | test eax, eax ; is it free? |
||
667 | jnz info_used ; no |
||
668 | inc ecx |
||
669 | |||
670 | info_used: |
||
671 | pop eax |
||
672 | inc eax |
||
673 | cmp eax, ebx ; is above last cluster? |
||
674 | jbe info_cluster ; no. test next cluster |
||
675 | |||
676 | dec ebx ; cluster count |
||
2643 | clevermous | 677 | imul edx, [ebp+FAT.SECTORS_PER_CLUSTER], 512; cluster size in bytes |
2288 | clevermous | 678 | xor eax, eax |
679 | ret |
||
680 | |||
681 | info_access_denied: |
||
682 | add esp, 4 |
||
683 | xor edx, edx |
||
684 | xor ebx, ebx |
||
685 | xor ecx, ecx |
||
686 | mov eax, ERROR_ACCESS_DENIED |
||
687 | ret |
||
2643 | clevermous | 688 | end if |
2288 | clevermous | 689 | |
690 | update_disk: |
||
691 | ;----------------------------------------------------------- |
||
692 | ; write changed fat and cache to disk |
||
693 | ;----------------------------------------------------------- |
||
2643 | clevermous | 694 | cmp [ebp+FAT.fat_change], 0 ; is fat changed? |
2288 | clevermous | 695 | je upd_no_change |
696 | |||
697 | call write_fat_sector |
||
2643 | clevermous | 698 | jc update_disk_acces_denied |
2288 | clevermous | 699 | |
700 | upd_no_change: |
||
701 | |||
2643 | clevermous | 702 | push esi |
703 | mov esi, [ebp+PARTITION.Disk] |
||
704 | call disk_sync |
||
705 | pop esi |
||
2288 | clevermous | 706 | update_disk_acces_denied: |
707 | ret |
||
708 | |||
2643 | clevermous | 709 | fat_lock: |
710 | lea ecx, [ebp+FAT.Lock] |
||
711 | jmp mutex_lock |
||
712 | fat_unlock: |
||
713 | lea ecx, [ebp+FAT.Lock] |
||
714 | jmp mutex_unlock |
||
2288 | clevermous | 715 | |
716 | ; \begin{diamond} |
||
717 | hd_find_lfn: |
||
2643 | clevermous | 718 | ; in: ebp -> FAT structure |
719 | ; in: esi+[esp+4] -> name |
||
720 | ; out: CF=1 - file not found, eax=error code |
||
2288 | clevermous | 721 | ; else CF=0 and edi->direntry, eax=sector |
722 | ; destroys eax |
||
723 | push esi edi |
||
724 | push 0 |
||
725 | push 0 |
||
726 | push fat16_root_first |
||
727 | push fat16_root_next |
||
2643 | clevermous | 728 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
729 | cmp [ebp+FAT.fs_type], 32 |
||
2288 | clevermous | 730 | jz .fat32 |
731 | .loop: |
||
732 | call fat_find_lfn |
||
733 | jc .notfound |
||
734 | cmp byte [esi], 0 |
||
735 | jz .found |
||
736 | .continue: |
||
737 | test byte [edi+11], 10h |
||
738 | jz .notfound |
||
739 | and dword [esp+12], 0 |
||
740 | mov eax, [edi+20-2] |
||
741 | mov ax, [edi+26] ; cluster |
||
742 | .fat32: |
||
743 | mov [esp+8], eax |
||
744 | mov dword [esp+4], fat_notroot_first |
||
745 | mov dword [esp], fat_notroot_next |
||
746 | jmp .loop |
||
747 | .notfound: |
||
748 | add esp, 16 |
||
749 | pop edi esi |
||
750 | stc |
||
2643 | clevermous | 751 | ret 4 |
2288 | clevermous | 752 | .found: |
2643 | clevermous | 753 | lea eax, [esp+4+24] |
754 | cmp dword [eax], 0 |
||
2288 | clevermous | 755 | jz @f |
2643 | clevermous | 756 | mov esi, [eax] |
757 | and dword [eax], 0 |
||
2288 | clevermous | 758 | jmp .continue |
759 | @@: |
||
760 | lea eax, [esp+8] |
||
761 | cmp dword [eax], 0 |
||
762 | jz .root |
||
763 | call fat_get_sector |
||
764 | jmp .cmn |
||
765 | .root: |
||
766 | mov eax, [eax+4] |
||
2643 | clevermous | 767 | add eax, [ebp+FAT.ROOT_START] |
2288 | clevermous | 768 | .cmn: |
769 | add esp, 20 ; CF=0 |
||
770 | pop esi |
||
2643 | clevermous | 771 | ret 4 |
2288 | clevermous | 772 | |
773 | ;---------------------------------------------------------------- |
||
774 | ; |
||
775 | ; fs_HdRead - LFN variant for reading hard disk |
||
776 | ; |
||
2643 | clevermous | 777 | ; Obsolete, will be replaced with filesystem-specific functions. |
778 | ; |
||
2288 | clevermous | 779 | ; esi points to filename |
780 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
781 | ; may be ebx=0 - start from first byte |
||
782 | ; ecx number of bytes to read, 0+ |
||
783 | ; edx mem location to return data |
||
784 | ; |
||
785 | ; ret ebx = bytes read or 0xffffffff file not found |
||
786 | ; eax = 0 ok read or other = errormsg |
||
787 | ; |
||
788 | ;-------------------------------------------------------------- |
||
789 | fs_HdRead: |
||
790 | cmp [fs_type], 16 |
||
791 | jz @f |
||
792 | cmp [fs_type], 32 |
||
793 | jz @f |
||
794 | cmp [fs_type], 1 |
||
795 | jz ntfs_HdRead |
||
796 | cmp [fs_type], 2 |
||
797 | jz ext2_HdRead |
||
798 | or ebx, -1 |
||
799 | mov eax, ERROR_UNKNOWN_FS |
||
800 | ret |
||
801 | @@: |
||
2643 | clevermous | 802 | sub ebx, 4 |
803 | push ebp |
||
804 | mov ebp, [fs_dependent_data_start.partition] |
||
805 | call fat_Read |
||
806 | pop ebp |
||
807 | ret |
||
808 | |||
809 | ;---------------------------------------------------------------- |
||
810 | ; fat_Read - FAT16/32 implementation of reading a file |
||
811 | ; in: ebp = pointer to FAT structure |
||
812 | ; in: esi+[esp+4] = name |
||
813 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
814 | ; out: eax, ebx = return values for sysfunc 70 |
||
815 | ;---------------------------------------------------------------- |
||
816 | fat_Read: |
||
817 | call fat_lock |
||
2288 | clevermous | 818 | push edi |
819 | cmp byte [esi], 0 |
||
820 | jnz @f |
||
821 | .noaccess: |
||
822 | pop edi |
||
823 | .noaccess_2: |
||
2643 | clevermous | 824 | call fat_unlock |
2288 | clevermous | 825 | or ebx, -1 |
826 | mov eax, ERROR_ACCESS_DENIED |
||
827 | ret |
||
828 | |||
829 | @@: |
||
2643 | clevermous | 830 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 831 | jnc .found |
832 | pop edi |
||
2643 | clevermous | 833 | push eax |
834 | call fat_unlock |
||
835 | pop eax |
||
2288 | clevermous | 836 | or ebx, -1 |
837 | ret |
||
838 | |||
839 | .found: |
||
840 | test byte [edi+11], 0x10; do not allow read directories |
||
841 | jnz .noaccess |
||
2643 | clevermous | 842 | cmp dword [ebx+8], 0 |
2288 | clevermous | 843 | jz @f |
844 | xor ebx, ebx |
||
845 | .reteof: |
||
2643 | clevermous | 846 | call fat_unlock |
847 | mov eax, ERROR_END_OF_FILE |
||
2288 | clevermous | 848 | pop edi |
849 | ret |
||
850 | @@: |
||
2643 | clevermous | 851 | mov ecx, [ebx+12] ; size |
852 | mov edx, [ebx+16] ; pointer |
||
853 | mov ebx, [ebx+4] ; file offset |
||
854 | push edx |
||
2288 | clevermous | 855 | push 0 |
856 | mov eax, [edi+28] |
||
857 | sub eax, ebx |
||
858 | jb .eof |
||
859 | cmp eax, ecx |
||
860 | jae @f |
||
861 | mov ecx, eax |
||
862 | mov byte [esp], 6 |
||
863 | @@: |
||
864 | mov eax, [edi+20-2] |
||
865 | mov ax, [edi+26] |
||
866 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
||
867 | .new_cluster: |
||
868 | jecxz .new_sector |
||
2643 | clevermous | 869 | cmp eax, 2 |
870 | jb .eof |
||
871 | cmp eax, [ebp+FAT.fatRESERVED] |
||
2288 | clevermous | 872 | jae .eof |
2643 | clevermous | 873 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 874 | dec eax |
875 | dec eax |
||
2643 | clevermous | 876 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 877 | imul eax, edi |
2643 | clevermous | 878 | add eax, [ebp+FAT.DATA_START] |
2288 | clevermous | 879 | .new_sector: |
880 | test ecx, ecx |
||
881 | jz .done |
||
882 | sub ebx, 512 |
||
883 | jae .skip |
||
884 | add ebx, 512 |
||
885 | jnz .force_buf |
||
886 | cmp ecx, 512 |
||
887 | jb .force_buf |
||
888 | ; we may read directly to given buffer |
||
2643 | clevermous | 889 | push eax ebx |
2288 | clevermous | 890 | mov ebx, edx |
2643 | clevermous | 891 | call fs_read32_app |
892 | test eax, eax |
||
893 | pop ebx eax |
||
2288 | clevermous | 894 | jne .noaccess_1 |
895 | add edx, 512 |
||
896 | sub ecx, 512 |
||
897 | jmp .skip |
||
898 | .force_buf: |
||
899 | ; we must read sector to temporary buffer and then copy it to destination |
||
900 | push eax ebx |
||
2643 | clevermous | 901 | lea ebx, [ebp+FAT.buffer] |
902 | call fs_read32_app |
||
903 | test eax, eax |
||
2288 | clevermous | 904 | mov eax, ebx |
905 | pop ebx |
||
906 | jne .noaccess_3 |
||
907 | add eax, ebx |
||
908 | push ecx |
||
909 | add ecx, ebx |
||
910 | cmp ecx, 512 |
||
911 | jbe @f |
||
912 | mov ecx, 512 |
||
913 | @@: |
||
914 | sub ecx, ebx |
||
915 | mov ebx, edx |
||
916 | call memmove |
||
917 | add edx, ecx |
||
918 | sub [esp], ecx |
||
919 | pop ecx |
||
920 | pop eax |
||
921 | xor ebx, ebx |
||
922 | .skip: |
||
923 | inc eax |
||
924 | dec edi |
||
925 | jnz .new_sector |
||
2643 | clevermous | 926 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 927 | call get_FAT |
2643 | clevermous | 928 | jc .noaccess_1 |
2288 | clevermous | 929 | |
930 | jmp .new_cluster |
||
931 | .noaccess_3: |
||
932 | pop eax |
||
933 | .noaccess_1: |
||
934 | pop eax |
||
2643 | clevermous | 935 | push ERROR_DEVICE |
2288 | clevermous | 936 | .done: |
937 | mov ebx, edx |
||
2643 | clevermous | 938 | call fat_unlock |
939 | pop eax edx edi |
||
2288 | clevermous | 940 | sub ebx, edx |
941 | ret |
||
942 | .eof: |
||
943 | mov ebx, edx |
||
2643 | clevermous | 944 | pop eax edx |
2288 | clevermous | 945 | sub ebx, edx |
946 | jmp .reteof |
||
947 | |||
948 | ;---------------------------------------------------------------- |
||
949 | ; |
||
950 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
951 | ; |
||
2643 | clevermous | 952 | ; Obsolete, will be replaced with filesystem-specific functions. |
953 | ; |
||
2288 | clevermous | 954 | ; esi points to filename |
955 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
||
956 | ; & flags (bitfields) |
||
957 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
958 | ; ecx number of blocks to read, 0+ |
||
959 | ; edx mem location to return data |
||
960 | ; |
||
961 | ; ret ebx = blocks read or 0xffffffff folder not found |
||
962 | ; eax = 0 ok read or other = errormsg |
||
963 | ; |
||
964 | ;-------------------------------------------------------------- |
||
965 | fs_HdReadFolder: |
||
2643 | clevermous | 966 | cmp [fs_type], 16 |
967 | jz @f |
||
968 | cmp [fs_type], 32 |
||
969 | jz @f |
||
2288 | clevermous | 970 | cmp [fs_type], 1 |
971 | jz ntfs_HdReadFolder |
||
972 | cmp [fs_type], 2 |
||
973 | jz ext2_HdReadFolder |
||
3598 | clevermous | 974 | movi eax, ERROR_UNSUPPORTED_FS |
2288 | clevermous | 975 | or ebx, -1 |
976 | ret |
||
977 | @@: |
||
2643 | clevermous | 978 | sub ebx, 4 |
979 | push ebp |
||
980 | mov ebp, [fs_dependent_data_start.partition] |
||
981 | call fat_ReadFolder |
||
982 | pop ebp |
||
983 | ret |
||
984 | |||
985 | ;---------------------------------------------------------------- |
||
986 | ; fat_ReadFolder - FAT16/32 implementation of reading a folder |
||
987 | ; in: ebp = pointer to FAT structure |
||
988 | ; in: esi+[esp+4] = name |
||
989 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
990 | ; out: eax, ebx = return values for sysfunc 70 |
||
991 | ;---------------------------------------------------------------- |
||
992 | fat_ReadFolder: |
||
993 | call fat_lock |
||
994 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
||
2288 | clevermous | 995 | push edi |
996 | cmp byte [esi], 0 |
||
997 | jz .doit |
||
2643 | clevermous | 998 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 999 | jnc .found |
1000 | pop edi |
||
2643 | clevermous | 1001 | push eax |
1002 | call fat_unlock |
||
1003 | pop eax |
||
2288 | clevermous | 1004 | or ebx, -1 |
1005 | ret |
||
1006 | .found: |
||
1007 | test byte [edi+11], 0x10 ; do not allow read files |
||
1008 | jnz .found_dir |
||
1009 | pop edi |
||
2643 | clevermous | 1010 | call fat_unlock |
2288 | clevermous | 1011 | or ebx, -1 |
1012 | mov eax, ERROR_ACCESS_DENIED |
||
1013 | ret |
||
1014 | .found_dir: |
||
1015 | mov eax, [edi+20-2] |
||
1016 | mov ax, [edi+26] ; eax=cluster |
||
1017 | .doit: |
||
2643 | clevermous | 1018 | push esi |
2288 | clevermous | 1019 | sub esp, 262*2 ; reserve space for LFN |
2643 | clevermous | 1020 | push dword [ebx+8] ; for fat_get_name: read ANSI/UNICODE name |
1021 | mov edx, [ebx+16] ; pointer to buffer |
||
2288 | clevermous | 1022 | ; init header |
2643 | clevermous | 1023 | push eax |
2288 | clevermous | 1024 | mov edi, edx |
1025 | mov ecx, 32/4 |
||
1026 | xor eax, eax |
||
1027 | rep stosd |
||
2643 | clevermous | 1028 | pop eax |
2288 | clevermous | 1029 | mov byte [edx], 1 ; version |
1030 | mov esi, edi ; esi points to BDFE |
||
2643 | clevermous | 1031 | mov ecx, [ebx+12] ; number of blocks to read |
1032 | mov ebx, [ebx+4] ; index of the first block |
||
2288 | clevermous | 1033 | .new_cluster: |
2643 | clevermous | 1034 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 1035 | test eax, eax |
1036 | jnz @f |
||
2643 | clevermous | 1037 | cmp [ebp+FAT.fs_type], 32 |
2288 | clevermous | 1038 | jz .notfound |
2643 | clevermous | 1039 | mov eax, [ebp+FAT.ROOT_START] |
1040 | push [ebp+FAT.ROOT_SECTORS] |
||
2288 | clevermous | 1041 | push ebx |
1042 | jmp .new_sector |
||
1043 | @@: |
||
1044 | dec eax |
||
1045 | dec eax |
||
2643 | clevermous | 1046 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1047 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
||
1048 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1049 | push ebx |
1050 | .new_sector: |
||
2643 | clevermous | 1051 | lea ebx, [ebp+FAT.buffer] |
2288 | clevermous | 1052 | mov edi, ebx |
2643 | clevermous | 1053 | push eax |
1054 | call fs_read32_sys |
||
1055 | test eax, eax |
||
1056 | pop eax |
||
2288 | clevermous | 1057 | jnz .notfound2 |
1058 | add ebx, 512 |
||
1059 | push eax |
||
1060 | .l1: |
||
2643 | clevermous | 1061 | push ebp |
1062 | lea ebp, [esp+20] |
||
2288 | clevermous | 1063 | call fat_get_name |
2643 | clevermous | 1064 | pop ebp |
2288 | clevermous | 1065 | jc .l2 |
1066 | cmp byte [edi+11], 0xF |
||
1067 | jnz .do_bdfe |
||
1068 | add edi, 0x20 |
||
1069 | cmp edi, ebx |
||
1070 | jb .do_bdfe |
||
1071 | pop eax |
||
1072 | inc eax |
||
1073 | dec dword [esp+4] |
||
1074 | jnz @f |
||
2643 | clevermous | 1075 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 1076 | test eax, eax |
1077 | jz .done |
||
1078 | call get_FAT |
||
2643 | clevermous | 1079 | jc .notfound2 |
2288 | clevermous | 1080 | cmp eax, 2 |
1081 | jb .done |
||
2643 | clevermous | 1082 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1083 | jae .done |
1084 | push eax |
||
2643 | clevermous | 1085 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1086 | mov [esp+8], eax |
1087 | pop eax |
||
2643 | clevermous | 1088 | mov [ebp+FAT.cluster_tmp], eax |
2288 | clevermous | 1089 | dec eax |
1090 | dec eax |
||
2643 | clevermous | 1091 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1092 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1093 | @@: |
2643 | clevermous | 1094 | lea ebx, [ebp+FAT.buffer] |
2288 | clevermous | 1095 | mov edi, ebx |
2643 | clevermous | 1096 | push eax |
1097 | call fs_read32_sys |
||
1098 | test eax, eax |
||
1099 | pop eax |
||
2288 | clevermous | 1100 | jnz .notfound2 |
1101 | add ebx, 512 |
||
1102 | push eax |
||
1103 | .do_bdfe: |
||
1104 | inc dword [edx+8] ; new file found |
||
1105 | dec dword [esp+4] |
||
1106 | jns .l2 |
||
1107 | dec ecx |
||
1108 | js .l2 |
||
1109 | inc dword [edx+4] ; new file block copied |
||
2643 | clevermous | 1110 | push ebp |
1111 | lea ebp, [esp+20] |
||
2288 | clevermous | 1112 | call fat_entry_to_bdfe |
2643 | clevermous | 1113 | pop ebp |
2288 | clevermous | 1114 | .l2: |
1115 | add edi, 0x20 |
||
1116 | cmp edi, ebx |
||
1117 | jb .l1 |
||
1118 | pop eax |
||
1119 | inc eax |
||
1120 | dec dword [esp+4] |
||
1121 | jnz .new_sector |
||
2643 | clevermous | 1122 | mov eax, [ebp+FAT.cluster_tmp] |
2288 | clevermous | 1123 | test eax, eax |
1124 | jz .done |
||
1125 | call get_FAT |
||
2643 | clevermous | 1126 | jc .notfound2 |
2288 | clevermous | 1127 | cmp eax, 2 |
1128 | jb .done |
||
2643 | clevermous | 1129 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1130 | jae .done |
1131 | push eax |
||
2643 | clevermous | 1132 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1133 | mov [esp+8], eax |
1134 | pop eax |
||
1135 | pop ebx |
||
1136 | add esp, 4 |
||
1137 | jmp .new_cluster |
||
1138 | .notfound2: |
||
1139 | add esp, 8 |
||
1140 | .notfound: |
||
1141 | add esp, 262*2+4 |
||
2643 | clevermous | 1142 | pop esi edi |
1143 | mov ebx, [edx+4] |
||
1144 | call fat_unlock |
||
1145 | mov eax, ERROR_DEVICE |
||
2288 | clevermous | 1146 | ret |
1147 | .done: |
||
1148 | add esp, 262*2+4+8 |
||
1149 | mov ebx, [edx+4] |
||
1150 | xor eax, eax |
||
1151 | dec ecx |
||
1152 | js @f |
||
1153 | mov al, ERROR_END_OF_FILE |
||
1154 | @@: |
||
2643 | clevermous | 1155 | push eax |
1156 | call fat_unlock |
||
1157 | pop eax |
||
1158 | pop esi edi |
||
2288 | clevermous | 1159 | ret |
1160 | |||
1161 | fat16_root_next: |
||
2643 | clevermous | 1162 | push ecx |
1163 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
||
1164 | cmp edi, ecx |
||
2288 | clevermous | 1165 | jae fat16_root_next_sector |
2643 | clevermous | 1166 | pop ecx |
2288 | clevermous | 1167 | add edi, 0x20 |
1168 | ret ; CF=0 |
||
1169 | fat16_root_next_sector: |
||
1170 | ; read next sector |
||
2643 | clevermous | 1171 | push [ebp+FAT.longname_sec2] |
1172 | pop [ebp+FAT.longname_sec1] |
||
2288 | clevermous | 1173 | mov ecx, [eax+4] |
1174 | push ecx |
||
2643 | clevermous | 1175 | add ecx, [ebp+FAT.ROOT_START] |
1176 | mov [ebp+FAT.longname_sec2], ecx |
||
2288 | clevermous | 1177 | pop ecx |
1178 | inc ecx |
||
1179 | mov [eax+4], ecx |
||
2643 | clevermous | 1180 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
2288 | clevermous | 1181 | pop ecx |
2643 | clevermous | 1182 | jb fat16_root_first |
1183 | mov eax, ERROR_FILE_NOT_FOUND |
||
1184 | stc |
||
1185 | ret |
||
2288 | clevermous | 1186 | fat16_root_first: |
1187 | mov eax, [eax+4] |
||
2643 | clevermous | 1188 | add eax, [ebp+FAT.ROOT_START] |
2288 | clevermous | 1189 | push ebx |
2643 | clevermous | 1190 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1191 | mov ebx, edi |
2643 | clevermous | 1192 | call fs_read32_sys |
2288 | clevermous | 1193 | pop ebx |
2643 | clevermous | 1194 | test eax, eax |
2288 | clevermous | 1195 | jnz .readerr |
1196 | ret ; CF=0 |
||
1197 | .readerr: |
||
2643 | clevermous | 1198 | mov eax, ERROR_DEVICE |
2288 | clevermous | 1199 | stc |
1200 | ret |
||
2643 | clevermous | 1201 | .notfound: |
1202 | mov eax, ERROR_FILE_NOT_FOUND |
||
1203 | stc |
||
1204 | ret |
||
2288 | clevermous | 1205 | fat16_root_begin_write: |
1206 | push edi eax |
||
1207 | call fat16_root_first |
||
1208 | pop eax edi |
||
1209 | ret |
||
1210 | fat16_root_end_write: |
||
1211 | pusha |
||
1212 | mov eax, [eax+4] |
||
2643 | clevermous | 1213 | add eax, [ebp+FAT.ROOT_START] |
1214 | lea ebx, [ebp+FAT.buffer] |
||
1215 | call fs_write32_sys |
||
2288 | clevermous | 1216 | popa |
1217 | ret |
||
1218 | fat16_root_next_write: |
||
2643 | clevermous | 1219 | push ecx |
1220 | lea ecx, [ebp+FAT.buffer+0x200] |
||
1221 | cmp edi, ecx |
||
2288 | clevermous | 1222 | jae @f |
2643 | clevermous | 1223 | pop ecx |
2288 | clevermous | 1224 | ret |
1225 | @@: |
||
1226 | call fat16_root_end_write |
||
1227 | jmp fat16_root_next_sector |
||
1228 | fat16_root_extend_dir: |
||
1229 | stc |
||
1230 | ret |
||
1231 | |||
1232 | fat_notroot_next: |
||
2643 | clevermous | 1233 | push ecx |
1234 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
||
1235 | cmp edi, ecx |
||
2288 | clevermous | 1236 | jae fat_notroot_next_sector |
2643 | clevermous | 1237 | pop ecx |
2288 | clevermous | 1238 | add edi, 0x20 |
1239 | ret ; CF=0 |
||
1240 | fat_notroot_next_sector: |
||
2643 | clevermous | 1241 | push [ebp+FAT.longname_sec2] |
1242 | pop [ebp+FAT.longname_sec1] |
||
2288 | clevermous | 1243 | push eax |
1244 | call fat_get_sector |
||
2643 | clevermous | 1245 | mov [ebp+FAT.longname_sec2], eax |
2288 | clevermous | 1246 | pop eax |
1247 | mov ecx, [eax+4] |
||
1248 | inc ecx |
||
2643 | clevermous | 1249 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1250 | jae fat_notroot_next_cluster |
1251 | mov [eax+4], ecx |
||
1252 | jmp @f |
||
1253 | fat_notroot_next_cluster: |
||
1254 | push eax |
||
1255 | mov eax, [eax] |
||
1256 | call get_FAT |
||
1257 | mov ecx, eax |
||
1258 | pop eax |
||
2643 | clevermous | 1259 | jc fat_notroot_first.deverr |
1260 | cmp ecx, 2 |
||
1261 | jb fat_notroot_next_err |
||
1262 | cmp ecx, [ebp+FAT.fatRESERVED] |
||
2288 | clevermous | 1263 | jae fat_notroot_next_err |
1264 | mov [eax], ecx |
||
1265 | and dword [eax+4], 0 |
||
1266 | @@: |
||
1267 | pop ecx |
||
1268 | fat_notroot_first: |
||
1269 | call fat_get_sector |
||
1270 | push ebx |
||
2643 | clevermous | 1271 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1272 | mov ebx, edi |
2643 | clevermous | 1273 | call fs_read32_sys |
2288 | clevermous | 1274 | pop ebx |
2643 | clevermous | 1275 | test eax, eax |
1276 | jz .ret ; CF=0 |
||
1277 | push ecx |
||
1278 | .deverr: |
||
1279 | pop ecx |
||
1280 | mov eax, ERROR_DEVICE |
||
1281 | stc |
||
1282 | .ret: |
||
1283 | ret |
||
2288 | clevermous | 1284 | fat_notroot_next_err: |
1285 | pop ecx |
||
2643 | clevermous | 1286 | mov eax, ERROR_FILE_NOT_FOUND |
2288 | clevermous | 1287 | stc |
1288 | ret |
||
1289 | fat_notroot_begin_write: |
||
1290 | push eax edi |
||
1291 | call fat_notroot_first |
||
1292 | pop edi eax |
||
1293 | ret |
||
1294 | fat_notroot_end_write: |
||
1295 | call fat_get_sector |
||
1296 | push ebx |
||
2643 | clevermous | 1297 | lea ebx, [ebp+FAT.buffer] |
1298 | call fs_write32_sys |
||
2288 | clevermous | 1299 | pop ebx |
1300 | ret |
||
1301 | fat_notroot_next_write: |
||
2643 | clevermous | 1302 | push ecx |
1303 | lea ecx, [ebp+FAT.buffer+0x200] |
||
1304 | cmp edi, ecx |
||
2288 | clevermous | 1305 | jae @f |
2643 | clevermous | 1306 | pop ecx |
2288 | clevermous | 1307 | ret |
1308 | @@: |
||
1309 | push eax |
||
1310 | call fat_notroot_end_write |
||
1311 | pop eax |
||
1312 | jmp fat_notroot_next_sector |
||
1313 | fat_notroot_extend_dir: |
||
1314 | push eax |
||
1315 | call get_free_FAT |
||
1316 | jnc .found |
||
1317 | pop eax |
||
1318 | ret ; CF=1 |
||
1319 | .found: |
||
1320 | push edx |
||
2643 | clevermous | 1321 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 1322 | call set_FAT |
2643 | clevermous | 1323 | jc .writeerr |
2288 | clevermous | 1324 | mov edx, eax |
1325 | mov eax, [esp+4] |
||
1326 | mov eax, [eax] |
||
1327 | push edx |
||
1328 | call set_FAT |
||
1329 | pop edx |
||
2643 | clevermous | 1330 | jnc @f |
1331 | .writeerr: |
||
2288 | clevermous | 1332 | pop edx |
1333 | pop eax |
||
1334 | stc |
||
1335 | ret |
||
1336 | @@: |
||
1337 | push ecx |
||
1338 | or ecx, -1 |
||
1339 | call add_disk_free_space |
||
1340 | ; zero new cluster |
||
1341 | mov ecx, 512/4 |
||
2643 | clevermous | 1342 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1343 | push edi |
1344 | xor eax, eax |
||
1345 | rep stosd |
||
1346 | pop edi |
||
1347 | pop ecx |
||
1348 | mov eax, [esp+4] |
||
1349 | mov [eax], edx |
||
1350 | and dword [eax+4], 0 |
||
1351 | pop edx |
||
1352 | mov eax, [eax] |
||
1353 | dec eax |
||
1354 | dec eax |
||
1355 | push ebx ecx |
||
2643 | clevermous | 1356 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1357 | imul eax, ecx |
2643 | clevermous | 1358 | add eax, [ebp+FAT.DATA_START] |
2288 | clevermous | 1359 | mov ebx, edi |
1360 | @@: |
||
2643 | clevermous | 1361 | push eax |
1362 | call fs_write32_sys |
||
1363 | pop eax |
||
2288 | clevermous | 1364 | inc eax |
1365 | loop @b |
||
1366 | pop ecx ebx eax |
||
1367 | clc |
||
1368 | ret |
||
1369 | |||
1370 | fat_get_sector: |
||
1371 | push ecx |
||
1372 | mov ecx, [eax] |
||
1373 | dec ecx |
||
1374 | dec ecx |
||
2643 | clevermous | 1375 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
1376 | add ecx, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 1377 | add ecx, [eax+4] |
1378 | mov eax, ecx |
||
1379 | pop ecx |
||
1380 | ret |
||
1381 | |||
1382 | ;---------------------------------------------------------------- |
||
1383 | ; |
||
1384 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
1385 | ; |
||
2643 | clevermous | 1386 | ; Obsolete, will be replaced with filesystem-specific functions. |
1387 | ; |
||
2288 | clevermous | 1388 | ; esi points to filename |
1389 | ; ebx ignored (reserved) |
||
1390 | ; ecx number of bytes to write, 0+ |
||
1391 | ; edx mem location to data |
||
1392 | ; |
||
1393 | ; ret ebx = number of written bytes |
||
1394 | ; eax = 0 ok read or other = errormsg |
||
1395 | ; |
||
1396 | ;-------------------------------------------------------------- |
||
1397 | fs_HdCreateFolder: |
||
1398 | mov al, 1 |
||
1399 | jmp fs_HdRewrite.common |
||
1400 | |||
1401 | fs_HdRewrite: |
||
1402 | xor eax, eax |
||
1403 | .common: |
||
2643 | clevermous | 1404 | cmp [fs_type], 16 |
1405 | jz @f |
||
1406 | cmp [fs_type], 32 |
||
1407 | jz @f |
||
2288 | clevermous | 1408 | cmp [fs_type], 1 |
1409 | jz ntfs_HdRewrite |
||
1410 | cmp [fs_type], 2 |
||
1411 | jz ext2_HdRewrite |
||
2643 | clevermous | 1412 | mov eax, ERROR_UNKNOWN_FS |
1413 | xor ebx, ebx |
||
1414 | ret |
||
2288 | clevermous | 1415 | @@: |
2643 | clevermous | 1416 | sub ebx, 4 |
1417 | push ebp |
||
1418 | mov ebp, [fs_dependent_data_start.partition] |
||
1419 | test eax, eax |
||
1420 | mov eax, fat_CreateFolder |
||
1421 | jnz @f |
||
1422 | mov eax, fat_Rewrite |
||
1423 | @@: |
||
1424 | call eax |
||
1425 | pop ebp |
||
1426 | ret |
||
1427 | |||
1428 | fshrad: |
||
1429 | call fat_unlock |
||
1430 | mov eax, ERROR_ACCESS_DENIED |
||
1431 | xor ebx, ebx |
||
1432 | ret |
||
1433 | |||
1434 | ;---------------------------------------------------------------- |
||
1435 | ; fat_CreateFolder - FAT16/32 implementation of creating a folder |
||
1436 | ; in: ebp = pointer to FAT structure |
||
1437 | ; in: esi+[esp+4] = name |
||
1438 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1439 | ; out: eax, ebx = return values for sysfunc 70 |
||
1440 | ;---------------------------------------------------------------- |
||
1441 | fat_CreateFolder: |
||
1442 | push 1 |
||
1443 | jmp fat_Rewrite.common |
||
1444 | |||
1445 | ;---------------------------------------------------------------- |
||
1446 | ; fat_HdRewrite - FAT16/32 implementation of creating a new file |
||
1447 | ; in: ebp = pointer to FAT structure |
||
1448 | ; in: esi+[esp+4] = name |
||
1449 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1450 | ; out: eax, ebx = return values for sysfunc 70 |
||
1451 | ;---------------------------------------------------------------- |
||
1452 | fat_Rewrite: |
||
1453 | push 0 |
||
1454 | .common: |
||
1455 | call fat_lock |
||
1456 | pop eax |
||
2288 | clevermous | 1457 | cmp byte [esi], 0 |
1458 | jz fshrad |
||
2643 | clevermous | 1459 | mov ecx, [ebx+12] |
1460 | mov edx, [ebx+16] |
||
2288 | clevermous | 1461 | pushad |
1462 | xor edi, edi |
||
2643 | clevermous | 1463 | mov edx, [esp+4+20h] |
2288 | clevermous | 1464 | push esi |
2643 | clevermous | 1465 | test edx, edx |
2288 | clevermous | 1466 | jz @f |
2643 | clevermous | 1467 | mov esi, edx |
2288 | clevermous | 1468 | @@: |
1469 | lodsb |
||
1470 | test al, al |
||
1471 | jz @f |
||
1472 | cmp al, '/' |
||
1473 | jnz @b |
||
1474 | lea edi, [esi-1] |
||
1475 | jmp @b |
||
1476 | @@: |
||
1477 | pop esi |
||
1478 | test edi, edi |
||
1479 | jnz .noroot |
||
2643 | clevermous | 1480 | test edx, edx |
2288 | clevermous | 1481 | jnz .hasebp |
2643 | clevermous | 1482 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
1483 | cmp [ebp+FAT.fs_type], 32 |
||
2288 | clevermous | 1484 | jz .pushnotroot |
2643 | clevermous | 1485 | xor edx, edx |
1486 | push edx |
||
2288 | clevermous | 1487 | push fat16_root_extend_dir |
1488 | push fat16_root_end_write |
||
1489 | push fat16_root_next_write |
||
1490 | push fat16_root_begin_write |
||
2643 | clevermous | 1491 | push edx |
1492 | push edx |
||
2288 | clevermous | 1493 | push fat16_root_first |
1494 | push fat16_root_next |
||
1495 | jmp .common1 |
||
1496 | .hasebp: |
||
1497 | mov eax, ERROR_ACCESS_DENIED |
||
2643 | clevermous | 1498 | cmp byte [edx], 0 |
2288 | clevermous | 1499 | jz .ret1 |
2643 | clevermous | 1500 | stdcall hd_find_lfn, 0 |
1501 | mov esi, [esp+4+20h] |
||
1502 | jc .ret1 |
||
2288 | clevermous | 1503 | jmp .common0 |
1504 | .noroot: |
||
1505 | mov eax, ERROR_ACCESS_DENIED |
||
1506 | cmp byte [edi+1], 0 |
||
1507 | jz .ret1 |
||
1508 | ; check existence |
||
1509 | mov byte [edi], 0 |
||
1510 | push edi |
||
2643 | clevermous | 1511 | stdcall hd_find_lfn, [esp+4+24h] |
2288 | clevermous | 1512 | pop esi |
1513 | mov byte [esi], '/' |
||
1514 | jnc @f |
||
1515 | .notfound0: |
||
1516 | mov eax, ERROR_FILE_NOT_FOUND |
||
1517 | .ret1: |
||
1518 | mov [esp+28], eax |
||
2643 | clevermous | 1519 | call fat_unlock |
2288 | clevermous | 1520 | popad |
1521 | xor ebx, ebx |
||
1522 | ret |
||
1523 | @@: |
||
1524 | inc esi |
||
1525 | .common0: |
||
1526 | test byte [edi+11], 0x10 ; must be directory |
||
1527 | mov eax, ERROR_ACCESS_DENIED |
||
1528 | jz .ret1 |
||
2643 | clevermous | 1529 | mov edx, [edi+20-2] |
1530 | mov dx, [edi+26] ; ebp=cluster |
||
2288 | clevermous | 1531 | mov eax, ERROR_FAT_TABLE |
2643 | clevermous | 1532 | cmp edx, 2 |
2288 | clevermous | 1533 | jb .ret1 |
1534 | .pushnotroot: |
||
2643 | clevermous | 1535 | push edx |
2288 | clevermous | 1536 | push fat_notroot_extend_dir |
1537 | push fat_notroot_end_write |
||
1538 | push fat_notroot_next_write |
||
1539 | push fat_notroot_begin_write |
||
1540 | push 0 |
||
2643 | clevermous | 1541 | push edx |
2288 | clevermous | 1542 | push fat_notroot_first |
1543 | push fat_notroot_next |
||
1544 | .common1: |
||
1545 | call fat_find_lfn |
||
1546 | jc .notfound |
||
1547 | ; found |
||
1548 | test byte [edi+11], 10h |
||
1549 | jz .exists_file |
||
1550 | ; found directory; if we are creating directory, return OK, |
||
1551 | ; if we are creating file, say "access denied" |
||
2643 | clevermous | 1552 | add esp, 36 |
1553 | call fat_unlock |
||
2288 | clevermous | 1554 | popad |
1555 | test al, al |
||
1556 | mov eax, ERROR_ACCESS_DENIED |
||
1557 | jz @f |
||
1558 | mov al, 0 |
||
1559 | @@: |
||
1560 | xor ebx, ebx |
||
1561 | ret |
||
1562 | .exists_file: |
||
1563 | ; found file; if we are creating directory, return "access denied", |
||
1564 | ; if we are creating file, delete existing file and continue |
||
2643 | clevermous | 1565 | cmp byte [esp+36+28], 0 |
2288 | clevermous | 1566 | jz @f |
2643 | clevermous | 1567 | add esp, 36 |
1568 | call fat_unlock |
||
2288 | clevermous | 1569 | popad |
1570 | mov eax, ERROR_ACCESS_DENIED |
||
1571 | xor ebx, ebx |
||
1572 | ret |
||
1573 | @@: |
||
1574 | ; delete FAT chain |
||
1575 | push edi |
||
1576 | xor eax, eax |
||
1577 | mov dword [edi+28], eax ; zero size |
||
1578 | xor ecx, ecx |
||
1579 | mov eax, [edi+20-2] |
||
1580 | mov ax, [edi+26] |
||
1581 | mov word [edi+20], cx |
||
1582 | mov word [edi+26], cx |
||
1583 | test eax, eax |
||
1584 | jz .done1 |
||
1585 | @@: |
||
2643 | clevermous | 1586 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 1587 | jae .done1 |
1588 | push edx |
||
1589 | xor edx, edx |
||
1590 | call set_FAT |
||
1591 | mov eax, edx |
||
1592 | pop edx |
||
2643 | clevermous | 1593 | jc .done1 |
2288 | clevermous | 1594 | inc ecx |
1595 | jmp @b |
||
1596 | .done1: |
||
1597 | pop edi |
||
1598 | call get_time_for_file |
||
1599 | mov [edi+22], ax |
||
1600 | call get_date_for_file |
||
1601 | mov [edi+24], ax |
||
1602 | mov [edi+18], ax |
||
1603 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1604 | jmp .doit |
||
1605 | .notfound: |
||
1606 | ; file is not found; generate short name |
||
1607 | call fat_name_is_legal |
||
1608 | jc @f |
||
2643 | clevermous | 1609 | add esp, 36 |
1610 | call fat_unlock |
||
2288 | clevermous | 1611 | popad |
1612 | mov eax, ERROR_FILE_NOT_FOUND |
||
1613 | xor ebx, ebx |
||
1614 | ret |
||
1615 | @@: |
||
1616 | sub esp, 12 |
||
1617 | mov edi, esp |
||
1618 | call fat_gen_short_name |
||
1619 | .test_short_name_loop: |
||
1620 | push esi edi ecx |
||
1621 | mov esi, edi |
||
1622 | lea eax, [esp+12+12+8] |
||
2643 | clevermous | 1623 | mov edx, [eax+24] |
1624 | mov [eax], edx |
||
2288 | clevermous | 1625 | and dword [eax+4], 0 |
1626 | call dword [eax-4] |
||
1627 | jc .found |
||
1628 | .test_short_name_entry: |
||
1629 | cmp byte [edi+11], 0xF |
||
1630 | jz .test_short_name_cont |
||
1631 | mov ecx, 11 |
||
1632 | push esi edi |
||
1633 | repz cmpsb |
||
1634 | pop edi esi |
||
1635 | jz .short_name_found |
||
1636 | .test_short_name_cont: |
||
1637 | lea eax, [esp+12+12+8] |
||
1638 | call dword [eax-8] |
||
1639 | jnc .test_short_name_entry |
||
1640 | jmp .found |
||
1641 | .short_name_found: |
||
1642 | pop ecx edi esi |
||
1643 | call fat_next_short_name |
||
1644 | jnc .test_short_name_loop |
||
1645 | .disk_full: |
||
2643 | clevermous | 1646 | add esp, 12+36 |
1647 | call fat_unlock |
||
2288 | clevermous | 1648 | popa |
1649 | mov eax, ERROR_DISK_FULL |
||
1650 | xor ebx, ebx |
||
1651 | ret |
||
1652 | .found: |
||
1653 | pop ecx edi esi |
||
1654 | ; now find space in directory |
||
1655 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1656 | mov al, '~' |
||
1657 | push ecx edi |
||
1658 | mov ecx, 8 |
||
1659 | repnz scasb |
||
3598 | clevermous | 1660 | movi eax, 1 ; 1 entry |
2288 | clevermous | 1661 | jnz .notilde |
1662 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1663 | xor eax, eax |
||
1664 | @@: |
||
1665 | cmp byte [esi], 0 |
||
1666 | jz @f |
||
1667 | inc esi |
||
1668 | inc eax |
||
1669 | jmp @b |
||
1670 | @@: |
||
1671 | sub esi, eax |
||
1672 | add eax, 12+13 |
||
1673 | mov ecx, 13 |
||
1674 | push edx |
||
1675 | cdq |
||
1676 | div ecx |
||
1677 | pop edx |
||
1678 | .notilde: |
||
1679 | push -1 |
||
1680 | push -1 |
||
1681 | push -1 |
||
1682 | ; find |
||
1683 | xor ecx, ecx |
||
1684 | push eax |
||
1685 | lea eax, [esp+16+8+12+8] |
||
2643 | clevermous | 1686 | mov edx, [eax+24] |
1687 | mov [eax], edx |
||
2288 | clevermous | 1688 | and dword [eax+4], 0 |
1689 | call dword [eax-4] |
||
1690 | pop eax |
||
1691 | jnc .scan_dir |
||
1692 | .fsfrfe3: |
||
2643 | clevermous | 1693 | add esp, 12+8+12+36 |
1694 | call fat_unlock |
||
2288 | clevermous | 1695 | popad |
2643 | clevermous | 1696 | mov eax, ERROR_DEVICE |
2288 | clevermous | 1697 | xor ebx, ebx |
1698 | ret |
||
1699 | .scan_dir: |
||
1700 | cmp byte [edi], 0 |
||
1701 | jz .free |
||
1702 | cmp byte [edi], 0xE5 |
||
1703 | jz .free |
||
1704 | xor ecx, ecx |
||
1705 | .scan_cont: |
||
1706 | push eax |
||
1707 | lea eax, [esp+16+8+12+8] |
||
1708 | call dword [eax-8] |
||
2643 | clevermous | 1709 | mov edx, eax |
2288 | clevermous | 1710 | pop eax |
1711 | jnc .scan_dir |
||
2643 | clevermous | 1712 | cmp edx, ERROR_DEVICE |
1713 | jz .fsfrfe3 |
||
2288 | clevermous | 1714 | push eax |
1715 | lea eax, [esp+16+8+12+8] |
||
1716 | call dword [eax+20] ; extend directory |
||
1717 | pop eax |
||
1718 | jnc .scan_dir |
||
2643 | clevermous | 1719 | add esp, 12+8+12+36 |
1720 | call fat_unlock |
||
2288 | clevermous | 1721 | popad |
1722 | mov eax, ERROR_DISK_FULL |
||
1723 | xor ebx, ebx |
||
1724 | ret |
||
1725 | .free: |
||
1726 | test ecx, ecx |
||
1727 | jnz @f |
||
1728 | mov [esp], edi |
||
1729 | mov ecx, [esp+12+8+12+8] |
||
1730 | mov [esp+4], ecx |
||
1731 | mov ecx, [esp+12+8+12+12] |
||
1732 | mov [esp+8], ecx |
||
1733 | xor ecx, ecx |
||
1734 | @@: |
||
1735 | inc ecx |
||
1736 | cmp ecx, eax |
||
1737 | jb .scan_cont |
||
1738 | ; found! |
||
2643 | clevermous | 1739 | push esi ecx |
1740 | ; If creating a directory, allocate one data cluster now and fail immediately |
||
1741 | ; if this is impossible. This prevents from creating an invalid directory entry |
||
1742 | ; on a full disk. |
||
1743 | ; yup, the argument is quite non-intuitive... but what should I do if |
||
1744 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
||
1745 | ; which in turn is filled with 0 in fat_Rewrite and 1 in fat_CreateFolder. |
||
1746 | cmp byte [esp+8+12+8+12+36+28], 0 |
||
1747 | jz .no.preallocate.folder.data |
||
1748 | call get_free_FAT |
||
1749 | jnc @f |
||
1750 | add esp, 8+12+8 |
||
1751 | jmp .disk_full |
||
1752 | @@: |
||
1753 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
||
1754 | .no.preallocate.folder.data: |
||
2288 | clevermous | 1755 | ; calculate name checksum |
1756 | mov esi, [esp+8+12] |
||
1757 | mov ecx, 11 |
||
1758 | xor eax, eax |
||
1759 | @@: |
||
1760 | ror al, 1 |
||
1761 | add al, [esi] |
||
1762 | inc esi |
||
1763 | loop @b |
||
1764 | pop ecx esi |
||
1765 | pop edi |
||
1766 | pop dword [esp+8+12+12] |
||
1767 | pop dword [esp+8+12+12] |
||
1768 | ; edi points to first entry in free chunk |
||
1769 | dec ecx |
||
1770 | jz .nolfn |
||
1771 | push esi |
||
1772 | push eax |
||
1773 | lea eax, [esp+8+8+12+8] |
||
1774 | call dword [eax+8] ; begin write |
||
1775 | mov al, 40h |
||
1776 | .writelfn: |
||
1777 | or al, cl |
||
1778 | mov esi, [esp+4] |
||
1779 | push ecx |
||
1780 | dec ecx |
||
1781 | imul ecx, 13 |
||
1782 | add esi, ecx |
||
1783 | stosb |
||
1784 | mov cl, 5 |
||
1785 | call fs_RamdiskRewrite.read_symbols |
||
1786 | mov ax, 0xF |
||
1787 | stosw |
||
1788 | mov al, [esp+4] |
||
1789 | stosb |
||
1790 | mov cl, 6 |
||
1791 | call fs_RamdiskRewrite.read_symbols |
||
1792 | xor eax, eax |
||
1793 | stosw |
||
1794 | mov cl, 2 |
||
1795 | call fs_RamdiskRewrite.read_symbols |
||
1796 | pop ecx |
||
1797 | lea eax, [esp+8+8+12+8] |
||
1798 | call dword [eax+12] ; next write |
||
1799 | xor eax, eax |
||
1800 | loop .writelfn |
||
1801 | pop eax |
||
1802 | pop esi |
||
1803 | ; lea eax, [esp+8+12+8] |
||
1804 | ; call dword [eax+16] ; end write |
||
1805 | .nolfn: |
||
1806 | xchg esi, [esp] |
||
1807 | mov ecx, 11 |
||
1808 | rep movsb |
||
1809 | mov word [edi], 20h ; attributes |
||
1810 | sub edi, 11 |
||
1811 | pop esi ecx |
||
1812 | add esp, 12 |
||
1813 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1814 | call get_time_for_file |
||
1815 | mov [edi+14], ax ; creation time |
||
1816 | mov [edi+22], ax ; last write time |
||
1817 | call get_date_for_file |
||
1818 | mov [edi+16], ax ; creation date |
||
1819 | mov [edi+24], ax ; last write date |
||
1820 | mov [edi+18], ax ; last access date |
||
1821 | xor ecx, ecx |
||
1822 | mov word [edi+20], cx ; high word of cluster |
||
1823 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
1824 | mov dword [edi+28], ecx ; file size - to be filled |
||
2643 | clevermous | 1825 | cmp byte [esp+36+28], cl |
2288 | clevermous | 1826 | jz .doit |
1827 | ; create directory |
||
1828 | mov byte [edi+11], 10h ; attributes: folder |
||
2643 | clevermous | 1829 | mov esi, edi |
2288 | clevermous | 1830 | lea eax, [esp+8] |
1831 | call dword [eax+16] ; flush directory |
||
2643 | clevermous | 1832 | mov eax, [esp+36+20] ; extract saved cluster |
1833 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
||
2288 | clevermous | 1834 | push ecx |
2643 | clevermous | 1835 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1836 | shl ecx, 9 |
2643 | clevermous | 1837 | push ecx |
1838 | push edi |
||
2288 | clevermous | 1839 | jmp .doit2 |
1840 | .doit: |
||
2643 | clevermous | 1841 | mov esi, [esp+36+20] |
2288 | clevermous | 1842 | lea eax, [esp+8] |
1843 | call dword [eax+16] ; flush directory |
||
1844 | push ecx |
||
2643 | clevermous | 1845 | mov ecx, [esp+4+36+24] |
2288 | clevermous | 1846 | push ecx |
1847 | push edi |
||
1848 | test ecx, ecx |
||
1849 | jz .done |
||
1850 | call get_free_FAT |
||
1851 | jc .diskfull |
||
2643 | clevermous | 1852 | .doit2: |
2288 | clevermous | 1853 | push eax |
1854 | mov [edi+26], ax |
||
1855 | shr eax, 16 |
||
1856 | mov [edi+20], ax |
||
1857 | lea eax, [esp+16+8] |
||
1858 | call dword [eax+16] ; flush directory |
||
1859 | pop eax |
||
1860 | push edx |
||
2643 | clevermous | 1861 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 1862 | call set_FAT |
1863 | pop edx |
||
1864 | .write_cluster: |
||
1865 | push eax |
||
1866 | dec eax |
||
1867 | dec eax |
||
2643 | clevermous | 1868 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1869 | add eax, [ebp+FAT.DATA_START] |
||
1870 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 1871 | ; write data |
1872 | .write_sector: |
||
2643 | clevermous | 1873 | cmp byte [esp+20+36+28], 0 |
2288 | clevermous | 1874 | jnz .writedir |
1875 | mov ecx, 512 |
||
2643 | clevermous | 1876 | cmp dword [esp+12], ecx |
2288 | clevermous | 1877 | jb .writeshort |
1878 | ; we can write directly from given buffer |
||
1879 | mov ebx, esi |
||
1880 | add esi, ecx |
||
1881 | jmp .writecommon |
||
1882 | .writeshort: |
||
2643 | clevermous | 1883 | mov ecx, [esp+12] |
2288 | clevermous | 1884 | push ecx |
2643 | clevermous | 1885 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1886 | mov ebx, edi |
1887 | rep movsb |
||
1888 | .writedircont: |
||
2643 | clevermous | 1889 | lea ecx, [ebp+FAT.buffer+0x200] |
2288 | clevermous | 1890 | sub ecx, edi |
1891 | push eax |
||
1892 | xor eax, eax |
||
1893 | rep stosb |
||
1894 | pop eax |
||
1895 | pop ecx |
||
1896 | .writecommon: |
||
2643 | clevermous | 1897 | push eax |
1898 | call fs_write32_app |
||
1899 | test eax, eax |
||
1900 | pop eax |
||
2288 | clevermous | 1901 | jnz .writeerr |
1902 | inc eax |
||
2643 | clevermous | 1903 | sub dword [esp+12], ecx |
2288 | clevermous | 1904 | jz .writedone |
2643 | clevermous | 1905 | dec dword [esp] |
2288 | clevermous | 1906 | jnz .write_sector |
2643 | clevermous | 1907 | pop eax |
2288 | clevermous | 1908 | ; allocate new cluster |
1909 | pop eax |
||
1910 | mov ecx, eax |
||
1911 | call get_free_FAT |
||
1912 | jc .diskfull |
||
1913 | push edx |
||
2643 | clevermous | 1914 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 1915 | call set_FAT |
1916 | xchg eax, ecx |
||
1917 | mov edx, ecx |
||
1918 | call set_FAT |
||
1919 | pop edx |
||
1920 | xchg eax, ecx |
||
1921 | jmp .write_cluster |
||
1922 | .diskfull: |
||
1923 | mov eax, ERROR_DISK_FULL |
||
1924 | jmp .ret |
||
1925 | .writeerr: |
||
2643 | clevermous | 1926 | pop eax eax |
2288 | clevermous | 1927 | sub esi, ecx |
2643 | clevermous | 1928 | mov eax, ERROR_DEVICE |
2288 | clevermous | 1929 | jmp .ret |
1930 | .writedone: |
||
2643 | clevermous | 1931 | pop eax eax |
2288 | clevermous | 1932 | .done: |
1933 | xor eax, eax |
||
1934 | .ret: |
||
1935 | pop edi ecx |
||
2643 | clevermous | 1936 | sub esi, [esp+4+36+20] |
1937 | mov [esp+4+36+28], eax |
||
1938 | mov [esp+4+36+16], esi |
||
1939 | lea eax, [esp+12] |
||
2288 | clevermous | 1940 | call dword [eax+8] |
2643 | clevermous | 1941 | mov [edi+28], esi |
2288 | clevermous | 1942 | call dword [eax+16] |
2643 | clevermous | 1943 | mov [esp+36+16], ebx |
1944 | lea eax, [esi+511] |
||
2288 | clevermous | 1945 | shr eax, 9 |
2643 | clevermous | 1946 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1947 | lea eax, [eax+ecx-1] |
1948 | xor edx, edx |
||
1949 | div ecx |
||
2643 | clevermous | 1950 | pop ecx |
2288 | clevermous | 1951 | sub ecx, eax |
1952 | call add_disk_free_space |
||
2643 | clevermous | 1953 | add esp, 36 |
2288 | clevermous | 1954 | call update_disk |
2643 | clevermous | 1955 | call fat_unlock |
2288 | clevermous | 1956 | popad |
1957 | ret |
||
1958 | .writedir: |
||
1959 | push 512 |
||
2643 | clevermous | 1960 | lea edi, [ebp+FAT.buffer] |
2288 | clevermous | 1961 | mov ebx, edi |
2643 | clevermous | 1962 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 1963 | shl ecx, 9 |
2643 | clevermous | 1964 | cmp ecx, [esp+16] |
2288 | clevermous | 1965 | jnz .writedircont |
2643 | clevermous | 1966 | dec dword [esp+20] |
2288 | clevermous | 1967 | push esi |
1968 | mov ecx, 32/4 |
||
1969 | rep movsd |
||
1970 | pop esi |
||
1971 | mov dword [edi-32], '. ' |
||
1972 | mov dword [edi-32+4], ' ' |
||
1973 | mov dword [edi-32+8], ' ' |
||
1974 | mov byte [edi-32+11], 10h |
||
1975 | push esi |
||
1976 | mov ecx, 32/4 |
||
1977 | rep movsd |
||
1978 | pop esi |
||
1979 | mov dword [edi-32], '.. ' |
||
1980 | mov dword [edi-32+4], ' ' |
||
1981 | mov dword [edi-32+8], ' ' |
||
1982 | mov byte [edi-32+11], 10h |
||
2643 | clevermous | 1983 | mov ecx, [esp+20+36] |
1984 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
||
2288 | clevermous | 1985 | jnz @f |
1986 | xor ecx, ecx |
||
1987 | @@: |
||
1988 | mov word [edi-32+26], cx |
||
1989 | shr ecx, 16 |
||
1990 | mov [edi-32+20], cx |
||
1991 | jmp .writedircont |
||
1992 | |||
1993 | ;---------------------------------------------------------------- |
||
1994 | ; |
||
1995 | ; fs_HdWrite - LFN variant for writing to hard disk |
||
1996 | ; |
||
2643 | clevermous | 1997 | ; Obsolete, will be replaced with filesystem-specific functions. |
1998 | ; |
||
2288 | clevermous | 1999 | ; esi points to filename |
2000 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2001 | ; may be ebx=0 - start from first byte |
||
2002 | ; ecx number of bytes to write, 0+ |
||
2003 | ; edx mem location to data |
||
2004 | ; |
||
2005 | ; ret ebx = bytes written (maybe 0) |
||
2006 | ; eax = 0 ok write or other = errormsg |
||
2007 | ; |
||
2008 | ;-------------------------------------------------------------- |
||
2643 | clevermous | 2009 | fat_Write.access_denied: |
2288 | clevermous | 2010 | push ERROR_ACCESS_DENIED |
2011 | fs_HdWrite.ret0: |
||
2012 | pop eax |
||
2013 | xor ebx, ebx |
||
2014 | ret |
||
2015 | |||
2016 | fs_HdWrite.ret11: |
||
2643 | clevermous | 2017 | push ERROR_DEVICE |
2288 | clevermous | 2018 | jmp fs_HdWrite.ret0 |
2019 | |||
2020 | fs_HdWrite: |
||
2643 | clevermous | 2021 | cmp [fs_type], 16 |
2022 | jz @f |
||
2023 | cmp [fs_type], 32 |
||
2024 | jz @f |
||
2288 | clevermous | 2025 | cmp [fs_type], 1 |
2026 | jz ntfs_HdWrite |
||
2027 | cmp [fs_type], 2 |
||
2028 | jz ext2_HdWrite |
||
2029 | push ERROR_UNKNOWN_FS |
||
2030 | jmp .ret0 |
||
2031 | @@: |
||
2643 | clevermous | 2032 | sub ebx, 4 |
2033 | push ebp |
||
2034 | mov ebp, [fs_dependent_data_start.partition] |
||
2035 | call fat_Write |
||
2036 | pop ebp |
||
2037 | ret |
||
2038 | |||
2039 | ;---------------------------------------------------------------- |
||
2040 | ; fat_Write - FAT16/32 implementation of writing to file |
||
2041 | ; in: ebp = pointer to FAT structure |
||
2042 | ; in: esi+[esp+4] = name |
||
2043 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2044 | ; out: eax, ebx = return values for sysfunc 70 |
||
2045 | ;---------------------------------------------------------------- |
||
2046 | fat_Write: |
||
2288 | clevermous | 2047 | cmp byte [esi], 0 |
2048 | jz .access_denied |
||
2643 | clevermous | 2049 | call fat_lock |
2050 | push edi |
||
2051 | stdcall hd_find_lfn, [esp+4+4] |
||
2288 | clevermous | 2052 | jnc .found |
2643 | clevermous | 2053 | pop edi |
2054 | push eax |
||
2055 | call fat_unlock |
||
2056 | jmp fs_HdWrite.ret0 |
||
2288 | clevermous | 2057 | .found: |
2058 | ; FAT does not support files larger than 4GB |
||
2643 | clevermous | 2059 | cmp dword [ebx+8], 0 |
2288 | clevermous | 2060 | jz @f |
2061 | .eof: |
||
2643 | clevermous | 2062 | pop edi |
2288 | clevermous | 2063 | push ERROR_END_OF_FILE |
2643 | clevermous | 2064 | call fat_unlock |
2065 | jmp fs_HdWrite.ret0 |
||
2288 | clevermous | 2066 | @@: |
2643 | clevermous | 2067 | mov ecx, [ebx+12] |
2068 | mov edx, [ebx+16] |
||
2069 | mov ebx, [ebx+4] |
||
2288 | clevermous | 2070 | ; now edi points to direntry, ebx=start byte to write, |
2071 | ; ecx=number of bytes to write, edx=data pointer |
||
2072 | |||
2073 | ; extend file if needed |
||
2074 | add ecx, ebx |
||
2075 | jc .eof ; FAT does not support files larger than 4GB |
||
2643 | clevermous | 2076 | push edx |
2288 | clevermous | 2077 | push eax ; save directory sector |
2078 | push 0 ; return value=0 |
||
2079 | |||
2080 | call get_time_for_file |
||
2081 | mov [edi+22], ax ; last write time |
||
2082 | call get_date_for_file |
||
2083 | mov [edi+24], ax ; last write date |
||
2084 | mov [edi+18], ax ; last access date |
||
2085 | |||
2086 | push dword [edi+28] ; save current file size |
||
2087 | cmp ecx, [edi+28] |
||
2088 | jbe .length_ok |
||
2089 | cmp ecx, ebx |
||
2090 | jz .length_ok |
||
2091 | call hd_extend_file |
||
2092 | jnc .length_ok |
||
2093 | mov [esp+4], eax |
||
2094 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2095 | ; First two cases are fatal errors, in third case we may write some data |
||
2096 | cmp al, ERROR_DISK_FULL |
||
2097 | jz .disk_full |
||
2643 | clevermous | 2098 | call fat_unlock |
2288 | clevermous | 2099 | pop eax |
2100 | pop eax |
||
2643 | clevermous | 2101 | pop ecx |
2102 | pop edx |
||
2103 | pop edi |
||
2288 | clevermous | 2104 | xor ebx, ebx |
2105 | ret |
||
2106 | .disk_full: |
||
2107 | ; correct number of bytes to write |
||
2108 | mov ecx, [edi+28] |
||
2109 | cmp ecx, ebx |
||
2110 | ja .length_ok |
||
2643 | clevermous | 2111 | push 0 |
2288 | clevermous | 2112 | .ret: |
2643 | clevermous | 2113 | pop eax |
2114 | sub edx, [esp+12] |
||
2115 | mov ebx, edx ; ebx=number of written bytes |
||
2288 | clevermous | 2116 | call update_disk |
2643 | clevermous | 2117 | test eax, eax |
2288 | clevermous | 2118 | jz @f |
2643 | clevermous | 2119 | mov byte [esp+4], ERROR_DEVICE |
2288 | clevermous | 2120 | @@: |
2643 | clevermous | 2121 | call fat_unlock |
2288 | clevermous | 2122 | pop eax |
2123 | pop eax |
||
2643 | clevermous | 2124 | pop ecx |
2125 | pop edx |
||
2126 | pop edi |
||
2288 | clevermous | 2127 | ret |
2128 | .length_ok: |
||
2129 | mov esi, [edi+28] |
||
2130 | mov eax, [edi+20-2] |
||
2131 | mov ax, [edi+26] |
||
2132 | mov edi, eax ; edi=current cluster |
||
2643 | clevermous | 2133 | push 0 ; current sector in cluster |
2288 | clevermous | 2134 | ; save directory |
2643 | clevermous | 2135 | mov eax, [esp+12] |
2288 | clevermous | 2136 | push ebx |
2643 | clevermous | 2137 | lea ebx, [ebp+FAT.buffer] |
2138 | call fs_write32_sys |
||
2288 | clevermous | 2139 | pop ebx |
2643 | clevermous | 2140 | test eax, eax |
2288 | clevermous | 2141 | jz @f |
2142 | .device_err: |
||
2643 | clevermous | 2143 | mov byte [esp+8], ERROR_DEVICE |
2288 | clevermous | 2144 | jmp .ret |
2643 | clevermous | 2145 | .fat_err: |
2146 | mov byte [esp+8], ERROR_FAT_TABLE |
||
2147 | jmp .ret |
||
2288 | clevermous | 2148 | @@: |
2149 | |||
2150 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
2151 | sub ecx, ebx |
||
2152 | jz .ret |
||
2153 | .write_loop: |
||
2154 | ; skip unmodified sectors |
||
2643 | clevermous | 2155 | cmp dword [esp+4], 0x200 |
2288 | clevermous | 2156 | jb .modify |
2157 | sub ebx, 0x200 |
||
2158 | jae .skip |
||
2159 | add ebx, 0x200 |
||
2160 | .modify: |
||
2161 | ; get length of data in current sector |
||
2162 | push ecx |
||
2163 | sub ebx, 0x200 |
||
2164 | jb .hasdata |
||
2165 | neg ebx |
||
2166 | xor ecx, ecx |
||
2167 | jmp @f |
||
2168 | .hasdata: |
||
2169 | neg ebx |
||
2170 | cmp ecx, ebx |
||
2171 | jbe @f |
||
2172 | mov ecx, ebx |
||
2173 | @@: |
||
2174 | ; get current sector number |
||
2175 | mov eax, edi |
||
2176 | dec eax |
||
2177 | dec eax |
||
2643 | clevermous | 2178 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2179 | add eax, [ebp+FAT.DATA_START] |
||
2180 | add eax, [esp+4] |
||
2288 | clevermous | 2181 | ; load sector if needed |
2643 | clevermous | 2182 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
2288 | clevermous | 2183 | jz .noread |
2184 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2185 | jz .noread |
||
2186 | cmp ecx, esi ; (same for the last sector) |
||
2187 | jz .noread |
||
2643 | clevermous | 2188 | push eax ebx |
2189 | lea ebx, [ebp+FAT.buffer] |
||
2190 | call fs_read32_app |
||
2191 | test eax, eax |
||
2192 | pop ebx eax |
||
2288 | clevermous | 2193 | jz @f |
2194 | .device_err2: |
||
2195 | pop ecx |
||
2196 | jmp .device_err |
||
2197 | @@: |
||
2198 | .noread: |
||
2199 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2200 | push eax ecx edi |
||
2201 | xor eax, eax |
||
2202 | mov ecx, 0x200 |
||
2643 | clevermous | 2203 | sub ecx, [esp+8+12] |
2288 | clevermous | 2204 | jbe @f |
2643 | clevermous | 2205 | lea edi, [ebp+FAT.buffer] |
2206 | add edi, [esp+8+12] |
||
2288 | clevermous | 2207 | rep stosb |
2208 | @@: |
||
2209 | ; zero uninitialized data in the last sector |
||
2210 | mov ecx, 0x200 |
||
2211 | sub ecx, esi |
||
2212 | jbe @f |
||
2643 | clevermous | 2213 | lea edi, [ebp+FAT.buffer+esi] |
2288 | clevermous | 2214 | rep stosb |
2215 | @@: |
||
2216 | pop edi ecx |
||
2217 | ; copy new data |
||
2218 | mov eax, edx |
||
2219 | neg ebx |
||
2220 | jecxz @f |
||
2643 | clevermous | 2221 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
2288 | clevermous | 2222 | call memmove |
2223 | xor ebx, ebx |
||
2224 | @@: |
||
2225 | pop eax |
||
2226 | ; save sector |
||
2227 | push ebx |
||
2643 | clevermous | 2228 | lea ebx, [ebp+FAT.buffer] |
2229 | call fs_write32_app |
||
2288 | clevermous | 2230 | pop ebx |
2643 | clevermous | 2231 | test eax, eax |
2288 | clevermous | 2232 | jnz .device_err2 |
2233 | add edx, ecx |
||
2234 | sub [esp], ecx |
||
2235 | pop ecx |
||
2236 | jz .ret |
||
2237 | .skip: |
||
2238 | ; next sector |
||
2643 | clevermous | 2239 | pop eax |
2240 | inc eax |
||
2241 | push eax |
||
2242 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2243 | jb @f |
2643 | clevermous | 2244 | and dword [esp], 0 |
2288 | clevermous | 2245 | mov eax, edi |
2246 | call get_FAT |
||
2247 | mov edi, eax |
||
2643 | clevermous | 2248 | jc .device_err |
2249 | cmp edi, 2 |
||
2250 | jb .fat_err |
||
2251 | cmp edi, [ebp+FAT.fatRESERVED] |
||
2252 | jae .fat_err |
||
2288 | clevermous | 2253 | @@: |
2254 | sub esi, 0x200 |
||
2255 | jae @f |
||
2256 | xor esi, esi |
||
2257 | @@: |
||
2643 | clevermous | 2258 | sub dword [esp+4], 0x200 |
2288 | clevermous | 2259 | jae @f |
2643 | clevermous | 2260 | and dword [esp+4], 0 |
2288 | clevermous | 2261 | @@: |
2262 | jmp .write_loop |
||
2263 | |||
2264 | hd_extend_file.zero_size: |
||
2265 | xor eax, eax |
||
2266 | jmp hd_extend_file.start_extend |
||
2267 | |||
2268 | ; extends file on hd to given size (new data area is undefined) |
||
2269 | ; in: edi->direntry, ecx=new size |
||
2270 | ; out: CF=0 => OK, eax=0 |
||
2643 | clevermous | 2271 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or ERROR_DEVICE) |
2288 | clevermous | 2272 | hd_extend_file: |
2643 | clevermous | 2273 | push esi |
2274 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2275 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
||
2288 | clevermous | 2276 | push ecx |
2277 | ; find the last cluster of file |
||
2278 | mov eax, [edi+20-2] |
||
2279 | mov ax, [edi+26] |
||
2280 | mov ecx, [edi+28] |
||
2281 | jecxz .zero_size |
||
2282 | .last_loop: |
||
2643 | clevermous | 2283 | sub ecx, esi |
2288 | clevermous | 2284 | jbe .last_found |
2285 | call get_FAT |
||
2643 | clevermous | 2286 | jnc @f |
2288 | clevermous | 2287 | .device_err: |
2288 | pop ecx |
||
2289 | .device_err2: |
||
2643 | clevermous | 2290 | pop esi |
2291 | push ERROR_DEVICE |
||
2288 | clevermous | 2292 | .ret_err: |
2293 | pop eax |
||
2294 | stc |
||
2295 | ret |
||
2296 | @@: |
||
2297 | cmp eax, 2 |
||
2298 | jb .fat_err |
||
2643 | clevermous | 2299 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 2300 | jb .last_loop |
2301 | .fat_err: |
||
2643 | clevermous | 2302 | pop ecx esi |
2288 | clevermous | 2303 | push ERROR_FAT_TABLE |
2304 | jmp .ret_err |
||
2305 | .last_found: |
||
2306 | push eax |
||
2307 | call get_FAT |
||
2643 | clevermous | 2308 | jnc @f |
2288 | clevermous | 2309 | pop eax |
2310 | jmp .device_err |
||
2311 | @@: |
||
2643 | clevermous | 2312 | cmp eax, [ebp+FAT.fatRESERVED] |
2288 | clevermous | 2313 | pop eax |
2314 | jb .fat_err |
||
2315 | ; set length to full number of clusters |
||
2316 | sub [edi+28], ecx |
||
2317 | .start_extend: |
||
2318 | pop ecx |
||
2319 | ; now do extend |
||
2320 | push edx |
||
2321 | mov edx, 2 ; start scan from cluster 2 |
||
2322 | .extend_loop: |
||
2323 | cmp [edi+28], ecx |
||
2324 | jae .extend_done |
||
2325 | ; add new cluster |
||
2326 | push eax |
||
2327 | call get_free_FAT |
||
2328 | jc .disk_full |
||
2643 | clevermous | 2329 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2330 | call set_FAT |
2331 | mov edx, eax |
||
2332 | pop eax |
||
2333 | test eax, eax |
||
2334 | jz .first_cluster |
||
2335 | push edx |
||
2336 | call set_FAT |
||
2337 | pop edx |
||
2338 | jmp @f |
||
2339 | .first_cluster: |
||
2340 | ror edx, 16 |
||
2341 | mov [edi+20], dx |
||
2342 | ror edx, 16 |
||
2343 | mov [edi+26], dx |
||
2344 | @@: |
||
2345 | push ecx |
||
2346 | mov ecx, -1 |
||
2347 | call add_disk_free_space |
||
2348 | pop ecx |
||
2349 | mov eax, edx |
||
2643 | clevermous | 2350 | add [edi+28], esi |
2288 | clevermous | 2351 | jmp .extend_loop |
2352 | .extend_done: |
||
2353 | mov [edi+28], ecx |
||
2643 | clevermous | 2354 | pop edx esi |
2288 | clevermous | 2355 | xor eax, eax ; CF=0 |
2356 | ret |
||
2357 | .device_err3: |
||
2358 | pop edx |
||
2359 | jmp .device_err2 |
||
2360 | .disk_full: |
||
2643 | clevermous | 2361 | pop eax edx esi |
3598 | clevermous | 2362 | movi eax, ERROR_DISK_FULL |
2288 | clevermous | 2363 | stc |
2364 | ret |
||
2365 | |||
2366 | ;---------------------------------------------------------------- |
||
2367 | ; |
||
2368 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
2369 | ; |
||
2643 | clevermous | 2370 | ; Obsolete, will be replaced with filesystem-specific functions. |
2371 | ; |
||
2288 | clevermous | 2372 | ; esi points to filename |
2373 | ; ebx points to 64-bit number = new file size |
||
2374 | ; ecx ignored (reserved) |
||
2375 | ; edx ignored (reserved) |
||
2376 | ; |
||
2377 | ; ret eax = 0 ok or other = errormsg |
||
2378 | ; |
||
2379 | ;-------------------------------------------------------------- |
||
2380 | fs_HdSetFileEnd: |
||
2643 | clevermous | 2381 | cmp [fs_type], 16 |
2382 | jz @f |
||
2383 | cmp [fs_type], 32 |
||
2384 | jz @f |
||
2288 | clevermous | 2385 | cmp [fs_type], 1 |
2386 | jz ntfs_HdSetFileEnd |
||
2387 | cmp [fs_type], 2 |
||
2388 | jz ext2_HdSetFileEnd |
||
3598 | clevermous | 2389 | movi eax, ERROR_UNKNOWN_FS |
2288 | clevermous | 2390 | ret |
2391 | @@: |
||
2643 | clevermous | 2392 | sub ebx, 4 |
2393 | push ebp |
||
2394 | mov ebp, [fs_dependent_data_start.partition] |
||
2395 | call fat_SetFileEnd |
||
2396 | pop ebp |
||
2397 | ret |
||
2398 | |||
2399 | ;---------------------------------------------------------------- |
||
2400 | ; fat_SetFileEnd - FAT16/32 implementation of setting end-of-file |
||
2401 | ; in: ebp = pointer to FAT structure |
||
2402 | ; in: esi+[esp+4] = name |
||
2403 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2404 | ; out: eax, ebx = return values for sysfunc 70 |
||
2405 | ;---------------------------------------------------------------- |
||
2406 | fat_SetFileEnd: |
||
2407 | call fat_lock |
||
2408 | push edi |
||
2288 | clevermous | 2409 | cmp byte [esi], 0 |
2410 | jnz @f |
||
2411 | .access_denied: |
||
2412 | push ERROR_ACCESS_DENIED |
||
2643 | clevermous | 2413 | .ret: |
2414 | call fat_unlock |
||
2415 | pop eax |
||
2416 | pop edi |
||
2417 | ret |
||
2288 | clevermous | 2418 | @@: |
2643 | clevermous | 2419 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 2420 | jnc @f |
2643 | clevermous | 2421 | .reteax: |
2422 | push eax |
||
2288 | clevermous | 2423 | jmp .ret |
2424 | @@: |
||
2425 | ; must not be directory |
||
2426 | test byte [edi+11], 10h |
||
2643 | clevermous | 2427 | jnz .access_denied |
2288 | clevermous | 2428 | ; file size must not exceed 4 Gb |
2643 | clevermous | 2429 | cmp dword [ebx+8], 0 |
2288 | clevermous | 2430 | jz @f |
2431 | push ERROR_END_OF_FILE |
||
2432 | jmp .ret |
||
2433 | @@: |
||
2434 | push eax ; save directory sector |
||
2435 | ; set file modification date/time to current |
||
2436 | call fat_update_datetime |
||
2643 | clevermous | 2437 | mov eax, [ebx+4] |
2288 | clevermous | 2438 | cmp eax, [edi+28] |
2439 | jb .truncate |
||
2440 | ja .expand |
||
2441 | pop eax |
||
2643 | clevermous | 2442 | lea ebx, [ebp+FAT.buffer] |
2443 | call fs_write32_sys |
||
2288 | clevermous | 2444 | pop edi |
2643 | clevermous | 2445 | test eax, eax |
2288 | clevermous | 2446 | jz @f |
2643 | clevermous | 2447 | push ERROR_DEVICE |
2448 | jmp .ret |
||
2288 | clevermous | 2449 | @@: |
2643 | clevermous | 2450 | push 0 |
2451 | jmp .ret |
||
2288 | clevermous | 2452 | .expand: |
2453 | push ebx ebp ecx |
||
2454 | push dword [edi+28] ; save old size |
||
2455 | mov ecx, eax |
||
2456 | call hd_extend_file |
||
2457 | push eax ; return code |
||
2458 | jnc .expand_ok |
||
2459 | cmp al, ERROR_DISK_FULL |
||
2460 | jz .disk_full |
||
2461 | .pop_ret: |
||
2462 | call update_disk |
||
2643 | clevermous | 2463 | pop eax ecx ecx ebp ebx ecx |
2464 | jmp .reteax |
||
2288 | clevermous | 2465 | .expand_ok: |
2466 | .disk_full: |
||
2467 | ; save directory |
||
2468 | mov eax, [edi+28] |
||
2469 | xchg eax, [esp+20] |
||
2643 | clevermous | 2470 | lea ebx, [ebp+FAT.buffer] |
2471 | call fs_write32_sys |
||
2472 | test eax, eax |
||
2288 | clevermous | 2473 | mov eax, [edi+20-2] |
2474 | mov ax, [edi+26] |
||
2475 | mov edi, eax |
||
2476 | jz @f |
||
2477 | .pop_ret11: |
||
2643 | clevermous | 2478 | mov byte [esp], ERROR_DEVICE |
2288 | clevermous | 2479 | jmp .pop_ret |
2480 | @@: |
||
2643 | clevermous | 2481 | test edi, edi |
2482 | jz .pop_ret |
||
2288 | clevermous | 2483 | ; now zero new data |
2643 | clevermous | 2484 | push 0 |
2485 | ; edi=current cluster, [esp]=sector in cluster |
||
2486 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
||
2288 | clevermous | 2487 | .zero_loop: |
2643 | clevermous | 2488 | cmp edi, 2 |
2489 | jb .error_fat |
||
2490 | cmp edi, [ebp+FAT.fatRESERVED] |
||
2491 | jae .error_fat |
||
2492 | sub dword [esp+8], 0x200 |
||
2288 | clevermous | 2493 | jae .next_cluster |
2494 | lea eax, [edi-2] |
||
2643 | clevermous | 2495 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2496 | add eax, [ebp+FAT.DATA_START] |
||
2497 | add eax, [esp] |
||
2498 | cmp dword [esp+8], -0x200 |
||
2288 | clevermous | 2499 | jz .noread |
2643 | clevermous | 2500 | push eax |
2501 | lea ebx, [ebp+FAT.buffer] |
||
2502 | call fs_read32_app |
||
2503 | test eax, eax |
||
2504 | pop eax |
||
2288 | clevermous | 2505 | jnz .err_next |
2506 | .noread: |
||
2643 | clevermous | 2507 | mov ecx, [esp+8] |
2288 | clevermous | 2508 | neg ecx |
2509 | push edi |
||
2643 | clevermous | 2510 | lea edi, [ebp+FAT.buffer+0x200] |
2511 | add edi, [esp+12] |
||
2288 | clevermous | 2512 | push eax |
2513 | xor eax, eax |
||
2643 | clevermous | 2514 | mov [esp+16], eax |
2288 | clevermous | 2515 | rep stosb |
2516 | pop eax |
||
2517 | pop edi |
||
2643 | clevermous | 2518 | call fs_write32_app |
2519 | test eax, eax |
||
2288 | clevermous | 2520 | jz .next_cluster |
2521 | .err_next: |
||
2643 | clevermous | 2522 | mov byte [esp+4], ERROR_DEVICE |
2288 | clevermous | 2523 | .next_cluster: |
2643 | clevermous | 2524 | pop eax |
2288 | clevermous | 2525 | sub dword [esp+20], 0x200 |
2526 | jbe .pop_ret |
||
2643 | clevermous | 2527 | inc eax |
2528 | push eax |
||
2529 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2530 | jb .zero_loop |
2643 | clevermous | 2531 | and dword [esp], 0 |
2288 | clevermous | 2532 | mov eax, edi |
2533 | call get_FAT |
||
2534 | mov edi, eax |
||
2643 | clevermous | 2535 | jnc .zero_loop |
2536 | pop eax |
||
2537 | jmp .pop_ret11 |
||
2288 | clevermous | 2538 | .truncate: |
2539 | mov [edi+28], eax |
||
2540 | push ecx |
||
2541 | mov ecx, [edi+20-2] |
||
2542 | mov cx, [edi+26] |
||
2543 | push eax |
||
2544 | test eax, eax |
||
2545 | jz .zero_size |
||
2546 | ; find new last cluster |
||
2547 | @@: |
||
2643 | clevermous | 2548 | cmp ecx, 2 |
2549 | jb .error_fat2 |
||
2550 | cmp ecx, [ebp+FAT.fatRESERVED] |
||
2551 | jae .error_fat2 |
||
2552 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2288 | clevermous | 2553 | shl eax, 9 |
2554 | sub [esp], eax |
||
2555 | jbe @f |
||
2556 | mov eax, ecx |
||
2557 | call get_FAT |
||
2558 | mov ecx, eax |
||
2643 | clevermous | 2559 | jnc @b |
2288 | clevermous | 2560 | .device_err3: |
2561 | pop eax ecx eax edi |
||
2643 | clevermous | 2562 | call update_disk |
2563 | call fat_unlock |
||
3598 | clevermous | 2564 | movi eax, ERROR_DEVICE |
2288 | clevermous | 2565 | ret |
2566 | @@: |
||
2567 | ; we will zero data at the end of last sector - remember it |
||
2568 | push ecx |
||
2569 | ; terminate FAT chain |
||
2570 | push edx |
||
2571 | mov eax, ecx |
||
2643 | clevermous | 2572 | mov edx, [ebp+FAT.fatEND] |
2288 | clevermous | 2573 | call set_FAT |
2574 | mov eax, edx |
||
2575 | pop edx |
||
2643 | clevermous | 2576 | jnc @f |
2288 | clevermous | 2577 | .device_err4: |
2578 | pop ecx |
||
2579 | jmp .device_err3 |
||
2580 | .zero_size: |
||
2581 | and word [edi+20], 0 |
||
2582 | and word [edi+26], 0 |
||
2583 | push 0 |
||
2584 | mov eax, ecx |
||
2585 | @@: |
||
2586 | ; delete FAT chain |
||
2587 | call clear_cluster_chain |
||
2643 | clevermous | 2588 | jc .device_err4 |
2288 | clevermous | 2589 | ; save directory |
2590 | mov eax, [esp+12] |
||
2591 | push ebx |
||
2643 | clevermous | 2592 | lea ebx, [ebp+FAT.buffer] |
2593 | call fs_write32_sys |
||
2288 | clevermous | 2594 | pop ebx |
2643 | clevermous | 2595 | test eax, eax |
2288 | clevermous | 2596 | jnz .device_err4 |
2597 | ; zero last sector, ignore errors |
||
2598 | pop ecx |
||
2599 | pop eax |
||
2600 | dec ecx |
||
2643 | clevermous | 2601 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2602 | add ecx, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 2603 | push eax |
2604 | sar eax, 9 |
||
2605 | add ecx, eax |
||
2606 | pop eax |
||
2607 | and eax, 0x1FF |
||
2608 | jz .truncate_done |
||
2609 | push ebx eax |
||
2610 | mov eax, ecx |
||
2643 | clevermous | 2611 | lea ebx, [ebp+FAT.buffer] |
2612 | call fs_read32_app |
||
2288 | clevermous | 2613 | pop eax |
2643 | clevermous | 2614 | lea edi, [ebp+FAT.buffer+eax] |
2288 | clevermous | 2615 | push ecx |
2616 | mov ecx, 0x200 |
||
2617 | sub ecx, eax |
||
2618 | xor eax, eax |
||
2619 | rep stosb |
||
2620 | pop eax |
||
2643 | clevermous | 2621 | call fs_write32_app |
2288 | clevermous | 2622 | pop ebx |
2623 | .truncate_done: |
||
2624 | pop ecx eax edi |
||
2625 | call update_disk |
||
2643 | clevermous | 2626 | call fat_unlock |
2288 | clevermous | 2627 | xor eax, eax |
2628 | ret |
||
2643 | clevermous | 2629 | .error_fat: |
2630 | pop eax |
||
2631 | mov byte [esp], ERROR_FAT_TABLE |
||
2632 | jmp .pop_ret |
||
2633 | .error_fat2: |
||
2634 | pop eax ecx eax edi |
||
2635 | call update_disk |
||
2636 | call fat_unlock |
||
3598 | clevermous | 2637 | movi eax, ERROR_FAT_TABLE |
2643 | clevermous | 2638 | ret |
2288 | clevermous | 2639 | |
2640 | fs_HdGetFileInfo: |
||
2643 | clevermous | 2641 | cmp [fs_type], 16 |
2642 | jz @f |
||
2643 | cmp [fs_type], 32 |
||
2644 | jz @f |
||
2288 | clevermous | 2645 | cmp [fs_type], 1 |
2646 | jz ntfs_HdGetFileInfo |
||
2647 | cmp [fs_type], 2 |
||
2648 | jz ext2_HdGetFileInfo |
||
2649 | mov eax, ERROR_UNKNOWN_FS |
||
2650 | ret |
||
2651 | @@: |
||
2643 | clevermous | 2652 | sub ebx, 4 |
2653 | push ebp |
||
2654 | mov ebp, [fs_dependent_data_start.partition] |
||
2655 | call fat_GetFileInfo |
||
2656 | pop ebp |
||
2657 | ret |
||
2658 | |||
2659 | ;---------------------------------------------------------------- |
||
2660 | ; fat_GetFileInfo - FAT16/32 implementation of getting file info |
||
2661 | ; in: ebp = pointer to FAT structure |
||
2662 | ; in: esi+[esp+4] = name |
||
2663 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2664 | ; out: eax, ebx = return values for sysfunc 70 |
||
2665 | ;---------------------------------------------------------------- |
||
2666 | fat_GetFileInfo: |
||
2288 | clevermous | 2667 | cmp byte [esi], 0 |
2668 | jnz @f |
||
2669 | mov eax, 2 |
||
2670 | ret |
||
2671 | @@: |
||
2672 | push edi |
||
2643 | clevermous | 2673 | call fat_lock |
2674 | stdcall hd_find_lfn, [esp+4+4] |
||
2675 | jc .error |
||
2676 | push ebp |
||
2677 | xor ebp, ebp |
||
2678 | mov esi, [ebx+16] |
||
2679 | mov dword [esi+4], ebp |
||
2680 | call fat_entry_to_bdfe2 |
||
2681 | pop ebp |
||
2682 | call fat_unlock |
||
2683 | xor eax, eax |
||
2288 | clevermous | 2684 | pop edi |
2685 | ret |
||
2643 | clevermous | 2686 | .error: |
2687 | push eax |
||
2688 | call fat_unlock |
||
2689 | pop eax |
||
2690 | pop edi |
||
2691 | ret |
||
2288 | clevermous | 2692 | |
2693 | fs_HdSetFileInfo: |
||
2643 | clevermous | 2694 | cmp [fs_type], 16 |
2695 | jz @f |
||
2696 | cmp [fs_type], 32 |
||
2697 | jz @f |
||
2288 | clevermous | 2698 | cmp [fs_type], 1 |
2699 | jz ntfs_HdSetFileInfo |
||
2700 | cmp [fs_type], 2 |
||
2701 | jz ext2_HdSetFileInfo |
||
2702 | mov eax, ERROR_UNKNOWN_FS |
||
2703 | ret |
||
2704 | @@: |
||
2643 | clevermous | 2705 | sub ebx, 4 |
2706 | push ebp |
||
2707 | mov ebp, [fs_dependent_data_start.partition] |
||
2708 | call fat_SetFileInfo |
||
2709 | pop ebp |
||
2710 | ret |
||
2711 | |||
2712 | ;---------------------------------------------------------------- |
||
2713 | ; fat_SetFileInfo - FAT16/32 implementation of setting file info |
||
2714 | ; in: ebp = pointer to FAT structure |
||
2715 | ; in: esi+[esp+4] = name |
||
2716 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2717 | ; out: eax, ebx = return values for sysfunc 70 |
||
2718 | ;---------------------------------------------------------------- |
||
2719 | fat_SetFileInfo: |
||
2288 | clevermous | 2720 | cmp byte [esi], 0 |
2721 | jnz @f |
||
2722 | mov eax, 2 |
||
2723 | ret |
||
2724 | @@: |
||
2725 | push edi |
||
2643 | clevermous | 2726 | call fat_lock |
2727 | stdcall hd_find_lfn, [esp+4+4] |
||
2728 | jc .error |
||
2288 | clevermous | 2729 | push eax |
2643 | clevermous | 2730 | mov edx, [ebx+16] |
2288 | clevermous | 2731 | call bdfe_to_fat_entry |
2732 | pop eax |
||
2643 | clevermous | 2733 | lea ebx, [ebp+FAT.buffer] |
2734 | call fs_write32_sys |
||
2288 | clevermous | 2735 | call update_disk |
2643 | clevermous | 2736 | call fat_unlock |
2288 | clevermous | 2737 | pop edi |
2738 | xor eax, eax |
||
2739 | ret |
||
2643 | clevermous | 2740 | .error: |
2741 | push eax |
||
2742 | call fat_unlock |
||
2743 | pop eax |
||
2744 | pop edi |
||
2745 | ret |
||
2288 | clevermous | 2746 | |
2747 | ;---------------------------------------------------------------- |
||
2748 | ; |
||
2749 | ; fs_HdDelete - delete file or empty folder from hard disk |
||
2750 | ; |
||
2643 | clevermous | 2751 | ; Obsolete, will be replaced with filesystem-specific functions. |
2752 | ; |
||
2288 | clevermous | 2753 | ; esi points to filename |
2754 | ; |
||
2755 | ; ret eax = 0 ok or other = errormsg |
||
2756 | ; |
||
2757 | ;-------------------------------------------------------------- |
||
2758 | fs_HdDelete: |
||
2643 | clevermous | 2759 | cmp [fs_type], 16 |
2760 | jz @f |
||
2761 | cmp [fs_type], 32 |
||
2762 | jz @f |
||
2288 | clevermous | 2763 | cmp [fs_type], 1 |
2764 | jz ntfs_HdDelete |
||
2765 | cmp [fs_type], 2 |
||
2766 | jz ext2_HdDelete |
||
3598 | clevermous | 2767 | movi eax, ERROR_UNKNOWN_FS |
2288 | clevermous | 2768 | ret |
2769 | @@: |
||
2643 | clevermous | 2770 | sub ebx, 4 |
2771 | push ebp |
||
2772 | mov ebp, [fs_dependent_data_start.partition] |
||
2773 | call fat_Delete |
||
2774 | pop ebp |
||
2775 | ret |
||
2776 | |||
2777 | ;---------------------------------------------------------------- |
||
2778 | ; fat_Delete - FAT16/32 implementation of deleting a file/folder |
||
2779 | ; in: ebp = pointer to FAT structure |
||
2780 | ; in: esi+[esp+4] = name |
||
2781 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
2782 | ; out: eax, ebx = return values for sysfunc 70 |
||
2783 | ;---------------------------------------------------------------- |
||
2784 | fat_Delete: |
||
2785 | call fat_lock |
||
2288 | clevermous | 2786 | cmp byte [esi], 0 |
2787 | jnz @f |
||
2788 | ; cannot delete root! |
||
2789 | .access_denied: |
||
2790 | push ERROR_ACCESS_DENIED |
||
2643 | clevermous | 2791 | .pop_ret: |
2792 | call fat_unlock |
||
2793 | pop eax |
||
2794 | xor ebx, ebx |
||
2795 | ret |
||
2288 | clevermous | 2796 | @@: |
2643 | clevermous | 2797 | and [ebp+FAT.longname_sec1], 0 |
2798 | and [ebp+FAT.longname_sec2], 0 |
||
2288 | clevermous | 2799 | push edi |
2643 | clevermous | 2800 | stdcall hd_find_lfn, [esp+4+4] |
2288 | clevermous | 2801 | jnc .found |
2802 | pop edi |
||
2803 | push ERROR_FILE_NOT_FOUND |
||
2804 | jmp .pop_ret |
||
2805 | .found: |
||
2806 | cmp dword [edi], '. ' |
||
2807 | jz .access_denied2 |
||
2808 | cmp dword [edi], '.. ' |
||
2809 | jz .access_denied2 |
||
2810 | test byte [edi+11], 10h |
||
2811 | jz .dodel |
||
2812 | ; we can delete only empty folders! |
||
2813 | pushad |
||
2643 | clevermous | 2814 | mov esi, [edi+20-2] |
2815 | mov si, [edi+26] |
||
2288 | clevermous | 2816 | xor ecx, ecx |
2643 | clevermous | 2817 | lea eax, [esi-2] |
2818 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2819 | add eax, [ebp+FAT.DATA_START] |
||
2820 | lea ebx, [ebp+FAT.buffer] |
||
2821 | call fs_read32_sys |
||
2822 | test eax, eax |
||
2288 | clevermous | 2823 | jnz .err1 |
2643 | clevermous | 2824 | lea eax, [ebx+0x200] |
2288 | clevermous | 2825 | add ebx, 2*0x20 |
2826 | .checkempty: |
||
2827 | cmp byte [ebx], 0 |
||
2828 | jz .empty |
||
2829 | cmp byte [ebx], 0xE5 |
||
2830 | jnz .notempty |
||
2831 | add ebx, 0x20 |
||
2643 | clevermous | 2832 | cmp ebx, eax |
2288 | clevermous | 2833 | jb .checkempty |
2834 | inc ecx |
||
2643 | clevermous | 2835 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | clevermous | 2836 | jb @f |
2643 | clevermous | 2837 | mov eax, esi |
2288 | clevermous | 2838 | call get_FAT |
2643 | clevermous | 2839 | jc .err1 |
3174 | clevermous | 2840 | cmp eax, 2 |
2841 | jb .error_fat |
||
2842 | cmp eax, [ebp+FAT.fatRESERVED] |
||
2843 | jae .empty |
||
2643 | clevermous | 2844 | mov esi, eax |
2288 | clevermous | 2845 | xor ecx, ecx |
2846 | @@: |
||
2643 | clevermous | 2847 | lea eax, [esi-2] |
2848 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
||
2849 | add eax, [ebp+FAT.DATA_START] |
||
2288 | clevermous | 2850 | add eax, ecx |
2643 | clevermous | 2851 | lea ebx, [ebp+FAT.buffer] |
2852 | call fs_read32_sys |
||
2853 | test eax, eax |
||
2854 | lea eax, [ebx+0x200] |
||
2288 | clevermous | 2855 | jz .checkempty |
2856 | .err1: |
||
2857 | popad |
||
2858 | .err2: |
||
2859 | pop edi |
||
2643 | clevermous | 2860 | call fat_unlock |
3598 | clevermous | 2861 | movi eax, ERROR_DEVICE |
2288 | clevermous | 2862 | ret |
3174 | clevermous | 2863 | .error_fat: |
2864 | popad |
||
2865 | pop edi |
||
2866 | call fat_unlock |
||
3598 | clevermous | 2867 | movi eax, ERROR_FAT_TABLE |
3174 | clevermous | 2868 | ret |
2288 | clevermous | 2869 | .notempty: |
2870 | popad |
||
2871 | .access_denied2: |
||
2872 | pop edi |
||
2643 | clevermous | 2873 | call fat_unlock |
3598 | clevermous | 2874 | movi eax, ERROR_ACCESS_DENIED |
2288 | clevermous | 2875 | ret |
2876 | .empty: |
||
2877 | popad |
||
2643 | clevermous | 2878 | push eax ebx |
2879 | lea ebx, [ebp+FAT.buffer] |
||
2880 | call fs_read32_sys |
||
2881 | test eax, eax |
||
2882 | pop ebx eax |
||
2288 | clevermous | 2883 | jnz .err2 |
2884 | .dodel: |
||
2885 | push eax |
||
2886 | mov eax, [edi+20-2] |
||
2887 | mov ax, [edi+26] |
||
2888 | xchg eax, [esp] |
||
2889 | ; delete folder entry |
||
2890 | mov byte [edi], 0xE5 |
||
2891 | ; delete LFN (if present) |
||
2892 | .lfndel: |
||
2643 | clevermous | 2893 | lea edx, [ebp+FAT.buffer] |
2894 | cmp edi, edx |
||
2288 | clevermous | 2895 | ja @f |
2643 | clevermous | 2896 | cmp [ebp+FAT.longname_sec2], 0 |
2288 | clevermous | 2897 | jz .lfndone |
2643 | clevermous | 2898 | push [ebp+FAT.longname_sec2] |
2899 | push [ebp+FAT.longname_sec1] |
||
2900 | pop [ebp+FAT.longname_sec2] |
||
2901 | and [ebp+FAT.longname_sec1], 0 |
||
2288 | clevermous | 2902 | push ebx |
2643 | clevermous | 2903 | mov ebx, edx |
2904 | call fs_write32_sys |
||
2288 | clevermous | 2905 | mov eax, [esp+4] |
2643 | clevermous | 2906 | call fs_read32_sys |
2288 | clevermous | 2907 | pop ebx |
2908 | pop eax |
||
2643 | clevermous | 2909 | lea edi, [ebp+FAT.buffer+0x200] |
2288 | clevermous | 2910 | @@: |
2911 | sub edi, 0x20 |
||
2912 | cmp byte [edi], 0xE5 |
||
2913 | jz .lfndone |
||
2914 | cmp byte [edi+11], 0xF |
||
2915 | jnz .lfndone |
||
2916 | mov byte [edi], 0xE5 |
||
2917 | jmp .lfndel |
||
2918 | .lfndone: |
||
2919 | push ebx |
||
2643 | clevermous | 2920 | lea ebx, [ebp+FAT.buffer] |
2921 | call fs_write32_sys |
||
2288 | clevermous | 2922 | pop ebx |
2923 | ; delete FAT chain |
||
2924 | pop eax |
||
2925 | call clear_cluster_chain |
||
2926 | call update_disk |
||
2643 | clevermous | 2927 | call fat_unlock |
2288 | clevermous | 2928 | pop edi |
2929 | xor eax, eax |
||
2930 | ret |
||
2931 | |||
2932 | ; \end{diamond}=>=>=>=>65536 |