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Rev | Author | Line No. | Line |
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256 | diamond | 1 | ntfs_test_bootsec: |
2 | ; in: ebx->buffer, edx=size of partition |
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3 | ; out: CF set <=> invalid |
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4 | ; 1. Name=='NTFS ' |
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5 | cmp dword [ebx+3], 'NTFS' |
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6 | jnz .no |
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7 | cmp dword [ebx+7], ' ' |
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8 | jnz .no |
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9 | ; 2. Number of bytes per sector is the same as for physical device |
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10 | ; (that is, 0x200 for hard disk) |
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11 | cmp word [ebx+11], 0x200 |
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12 | jnz .no |
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13 | ; 3. Number of sectors per cluster must be power of 2 |
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14 | movzx eax, byte [ebx+13] |
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15 | dec eax |
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16 | js .no |
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17 | test al, [ebx+13] |
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18 | jnz .no |
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19 | ; 4. FAT parameters must be zero |
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20 | cmp word [ebx+14], 0 |
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21 | jnz .no |
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22 | cmp dword [ebx+16], 0 |
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23 | jnz .no |
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24 | cmp byte [ebx+20], 0 |
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25 | jnz .no |
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26 | cmp word [ebx+22], 0 |
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27 | jnz .no |
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28 | cmp dword [ebx+32], 0 |
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29 | jnz .no |
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30 | ; 5. Number of sectors <= partition size |
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31 | cmp dword [ebx+0x2C], 0 |
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32 | ja .no |
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33 | cmp [ebx+0x28], edx |
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34 | ja .no |
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35 | ; 6. $MFT and $MFTMirr clusters must be within partition |
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36 | cmp dword [ebx+0x34], 0 |
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37 | ja .no |
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38 | push edx |
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39 | movzx eax, byte [ebx+13] |
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40 | mul dword [ebx+0x30] |
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41 | test edx, edx |
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42 | pop edx |
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43 | jnz .no |
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44 | cmp eax, edx |
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45 | ja .no |
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46 | cmp dword [ebx+0x3C], 0 |
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47 | ja .no |
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48 | push edx |
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49 | movzx eax, byte [ebx+13] |
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50 | mul dword [ebx+0x38] |
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51 | test edx, edx |
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52 | pop edx |
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53 | jnz .no |
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54 | cmp eax, edx |
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55 | ja .no |
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56 | ; 7. Clusters per FRS must be either negative and in [-31,-9] or positive and power of 2 |
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57 | movsx eax, byte [ebx+0x40] |
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58 | cmp al, -31 |
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59 | jl .no |
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60 | cmp al, -9 |
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61 | jle @f |
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62 | dec eax |
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63 | js .no |
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64 | test [ebx+0x40], al |
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65 | jnz .no |
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66 | @@: |
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67 | ; 8. Same for clusters per IndexAllocationBuffer |
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68 | movsx eax, byte [ebx+0x44] |
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69 | cmp al, -31 |
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70 | jl .no |
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71 | cmp al, -9 |
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72 | jle @f |
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73 | dec eax |
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74 | js .no |
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75 | test [ebx+0x44], al |
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76 | jnz .no |
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77 | @@: |
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78 | ; OK, this is correct NTFS bootsector |
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79 | clc |
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80 | ret |
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81 | .no: |
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82 | ; No, this bootsector isn't NTFS |
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83 | stc |
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84 | ret |
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85 | |||
86 | ntfs_setup: ; CODE XREF: part_set.inc |
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87 | ; By given bootsector, initialize some NTFS variables |
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88 | call ntfs_test_bootsec |
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89 | jc problem_fat_dec_count |
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90 | movzx eax, byte [ebx+13] |
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91 | mov [ntfs_data.sectors_per_cluster], eax |
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92 | mov eax, [ebx+0x28] |
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93 | add eax, [PARTITION_START] |
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94 | dec eax |
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95 | mov [PARTITION_END], eax |
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96 | mov [fs_type], 1 |
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97 | mov eax, [ebx+0x30] |
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98 | mov [ntfs_data.mft_cluster], eax |
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99 | mov eax, [ebx+0x38] |
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100 | mov [ntfs_data.mftmirr_cluster], eax |
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101 | movsx eax, byte [ebx+0x40] |
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102 | test eax, eax |
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103 | js .1 |
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104 | mul [ntfs_data.sectors_per_cluster] |
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105 | shl eax, 9 |
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106 | jmp .2 |
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107 | .1: |
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108 | neg eax |
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109 | mov ecx, eax |
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110 | mov eax, 1 |
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111 | shl eax, cl |
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112 | .2: |
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113 | mov [ntfs_data.frs_size], eax |
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114 | movsx eax, byte [ebx+0x44] |
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115 | test eax, eax |
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116 | js .3 |
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117 | mul [ntfs_data.sectors_per_cluster] |
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118 | shl eax, 9 |
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119 | jmp .4 |
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120 | .3: |
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121 | neg eax |
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122 | mov ecx, eax |
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123 | mov eax, 1 |
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124 | shl eax, cl |
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125 | .4: |
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126 | mov [ntfs_data.iab_size], eax |
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127 | ; allocate space for buffers |
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128 | add eax, [ntfs_data.frs_size] |
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129 | push eax |
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130 | call kernel_alloc |
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131 | test eax, eax |
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132 | jz problem_fat_dec_count |
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133 | mov [ntfs_data.frs_buffer], eax |
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134 | add eax, [ntfs_data.frs_size] |
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135 | mov [ntfs_data.iab_buffer], eax |
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136 | ; read $MFT disposition |
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137 | mov eax, [ntfs_data.mft_cluster] |
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138 | mul [ntfs_data.sectors_per_cluster] |
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139 | call ntfs_read_frs_sector |
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140 | cmp [hd_error], 0 |
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141 | jnz .usemirr |
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142 | cmp dword [ebx], 'FILE' |
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143 | jnz .usemirr |
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144 | call ntfs_restore_usa_frs |
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145 | jnc .mftok |
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146 | .usemirr: |
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147 | and [hd_error], 0 |
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148 | mov eax, [ntfs_data.mftmirr_cluster] |
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149 | mul [ntfs_data.sectors_per_cluster] |
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150 | call ntfs_read_frs_sector |
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151 | cmp [hd_error], 0 |
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152 | jnz @f |
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153 | cmp dword [ebx], 'FILE' |
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154 | jnz @f |
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155 | call ntfs_restore_usa_frs |
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156 | jnc .mftok |
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157 | @@: |
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158 | ; $MFT and $MFTMirr invalid! |
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159 | .fail_free_frs: |
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160 | push [ntfs_data.frs_buffer] |
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161 | call kernel_free |
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162 | jmp problem_fat_dec_count |
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163 | .fail_free_mft: |
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164 | push [ntfs_data.mft_retrieval] |
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165 | call kernel_free |
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166 | jmp .fail_free_frs |
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167 | .mftok: |
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168 | ; read $MFT table retrieval information |
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169 | ; start with one page, increase if not enough (when MFT too fragmented) |
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170 | push ebx |
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171 | push 0x1000 |
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172 | call kernel_alloc |
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173 | pop ebx |
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174 | test eax, eax |
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175 | jz .fail_free_frs |
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176 | mov [ntfs_data.mft_retrieval], eax |
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177 | and [ntfs_data.mft_retrieval_size], 0 |
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178 | mov [ntfs_data.mft_retrieval_alloc], 0x1000/8 |
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179 | ; $MFT base record must contain unnamed non-resident $DATA attribute |
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180 | movzx eax, word [ebx+14h] |
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181 | add eax, ebx |
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182 | .scandata: |
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183 | cmp dword [eax], -1 |
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184 | jz .fail_free_mft |
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185 | cmp dword [eax], 0x80 |
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186 | jnz @f |
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187 | cmp byte [eax+9], 0 |
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188 | jz .founddata |
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189 | @@: |
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190 | add eax, [eax+4] |
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191 | jmp .scandata |
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192 | .founddata: |
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193 | cmp byte [eax+8], 0 |
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194 | jz .fail_free_mft |
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195 | ; load first portion of $DATA attribute retrieval information |
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196 | mov edx, [eax+0x18] |
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197 | mov [ntfs_data.mft_retrieval_end], edx |
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198 | mov esi, eax |
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199 | movzx eax, word [eax+0x20] |
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200 | add esi, eax |
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201 | sub esp, 10h |
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202 | .scanmcb: |
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203 | call ntfs_decode_mcb_entry |
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204 | jnc .scanmcbend |
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205 | call .get_mft_retrieval_ptr |
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206 | mov edx, [esp] ; block length |
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207 | mov [eax], edx |
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208 | mov edx, [esp+8] ; block addr (relative) |
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209 | mov [eax+4], edx |
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210 | inc [ntfs_data.mft_retrieval_size] |
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211 | jmp .scanmcb |
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212 | .scanmcbend: |
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213 | add esp, 10h |
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214 | ; there may be other portions of $DATA attribute in auxiliary records; |
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215 | ; if they will be needed, they will be loaded later |
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216 | |||
217 | mov [ntfs_data.cur_index_size], 0x1000/0x200 |
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218 | push 0x1000 |
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219 | call kernel_alloc |
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220 | test eax, eax |
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221 | jz .fail_free_mft |
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222 | mov [ntfs_data.cur_index_buf], eax |
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223 | |||
224 | popad |
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225 | and [hd1_status], 0 |
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226 | ret |
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227 | |||
228 | .get_mft_retrieval_ptr: |
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229 | pushad |
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230 | mov eax, [ntfs_data.mft_retrieval_size] |
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231 | cmp eax, [ntfs_data.mft_retrieval_alloc] |
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232 | jnz .ok |
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233 | add eax, 0x1000/8 |
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234 | mov [ntfs_data.mft_retrieval_alloc], eax |
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235 | shl eax, 3 |
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236 | push eax |
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237 | call kernel_alloc |
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238 | test eax, eax |
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239 | jnz @f |
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240 | popad |
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241 | add esp, 14h |
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242 | jmp .fail_free_mft |
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243 | @@: |
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244 | mov esi, [ntfs_data.mft_retrieval] |
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245 | mov edi, eax |
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246 | mov ecx, [ntfs_data.mft_retrieval_size] |
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247 | add ecx, ecx |
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248 | rep movsd |
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249 | push [ntfs_data.mft_retrieval] |
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250 | mov [ntfs_data.mft_retrieval], eax |
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251 | call kernel_free |
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252 | mov eax, [ntfs_data.mft_retrieval_size] |
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253 | .ok: |
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254 | shl eax, 3 |
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255 | add eax, [ntfs_data.mft_retrieval] |
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256 | mov [esp+28], eax |
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257 | popad |
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258 | ret |
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259 | |||
260 | ntfs_read_frs_sector: |
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261 | push eax ecx |
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262 | add eax, [PARTITION_START] |
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263 | mov ecx, [ntfs_data.frs_size] |
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264 | shr ecx, 9 |
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265 | mov ebx, [ntfs_data.frs_buffer] |
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266 | push ebx |
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267 | @@: |
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268 | call hd_read |
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269 | cmp [hd_error], 0 |
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270 | jnz .fail |
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271 | add ebx, 0x200 |
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272 | inc eax |
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273 | loop @b |
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274 | .fail: |
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275 | pop ebx |
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276 | pop ecx eax |
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277 | ret |
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278 | |||
279 | uglobal |
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280 | align 4 |
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281 | ntfs_cur_attr dd ? |
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282 | ntfs_cur_iRecord dd ? |
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283 | ntfs_cur_offs dd ? ; in sectors |
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284 | ntfs_cur_size dd ? ; in sectors |
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285 | ntfs_cur_buf dd ? |
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286 | ntfs_cur_read dd ? ; [output] |
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265 | diamond | 287 | ntfs_bCanContinue db ? |
288 | rb 3 |
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256 | diamond | 289 | |
290 | ntfs_attrlist_buf rb 0x400 |
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291 | ntfs_bitmap_buf rb 0x400 |
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292 | |||
293 | ntfs_attr_iRecord dd ? |
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294 | ntfs_attr_iBaseRecord dd ? |
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295 | ntfs_attr_offs dd ? |
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296 | ntfs_attr_list dd ? |
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257 | diamond | 297 | ntfs_attr_size dq ? |
262 | diamond | 298 | ntfs_cur_tail dd ? |
256 | diamond | 299 | endg |
300 | |||
265 | diamond | 301 | |
256 | diamond | 302 | ntfs_read_attr: |
303 | ; in: global variables |
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304 | ; out: [ntfs_cur_read] |
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305 | pushad |
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306 | and [ntfs_cur_read], 0 |
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307 | cmp [ntfs_cur_iRecord], 0 |
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308 | jnz .nomft |
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309 | cmp [ntfs_cur_attr], 0x80 |
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310 | jnz .nomft |
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311 | mov eax, [ntfs_data.mft_retrieval_end] |
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312 | inc eax |
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313 | mul [ntfs_data.sectors_per_cluster] |
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314 | cmp eax, [ntfs_cur_offs] |
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315 | jbe .nomft |
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316 | ; precalculated part of $Mft $DATA |
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317 | mov esi, [ntfs_data.mft_retrieval] |
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318 | mov eax, [ntfs_cur_offs] |
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319 | xor edx, edx |
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320 | div [ntfs_data.sectors_per_cluster] |
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321 | ; eax = VCN, edx = offset in sectors from beginning of cluster |
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322 | xor ecx, ecx ; ecx will contain LCN |
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323 | .mftscan: |
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324 | add ecx, [esi+4] |
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325 | sub eax, [esi] |
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326 | jb @f |
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327 | add esi, 8 |
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328 | push eax |
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329 | mov eax, [ntfs_data.mft_retrieval_end] |
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330 | shl eax, 3 |
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331 | add eax, [ntfs_data.mft_retrieval] |
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332 | cmp eax, esi |
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333 | pop eax |
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334 | jnz .mftscan |
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335 | jmp .nomft |
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336 | @@: |
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337 | push ecx |
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338 | add ecx, eax |
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339 | add ecx, [esi] |
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340 | push eax |
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341 | push edx |
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342 | mov eax, [ntfs_data.sectors_per_cluster] |
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343 | mul ecx |
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344 | ; eax = sector on partition |
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345 | add eax, [PARTITION_START] |
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346 | pop edx |
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347 | add eax, edx |
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348 | mov ebx, [ntfs_cur_buf] |
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349 | pop ecx |
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350 | neg ecx |
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351 | imul ecx, [ntfs_data.sectors_per_cluster] |
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352 | sub ecx, edx |
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353 | cmp ecx, [ntfs_cur_size] |
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354 | jb @f |
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355 | mov ecx, [ntfs_cur_size] |
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356 | @@: |
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357 | ; ecx = number of sequential sectors to read |
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358 | call hd_read |
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359 | cmp [hd_error], 0 |
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360 | jnz .errread |
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361 | add [ntfs_cur_read], 0x200 |
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362 | dec [ntfs_cur_size] |
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363 | inc [ntfs_cur_offs] |
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364 | add ebx, 0x200 |
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365 | mov [ntfs_cur_buf], ebx |
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366 | inc eax |
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367 | loop @b |
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368 | pop ecx |
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369 | xor eax, eax |
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370 | xor edx, edx |
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371 | cmp [ntfs_cur_size], eax |
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372 | jz @f |
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373 | add esi, 8 |
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374 | push eax |
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375 | mov eax, [ntfs_data.mft_retrieval_end] |
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376 | shl eax, 3 |
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377 | add eax, [ntfs_data.mft_retrieval] |
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378 | cmp eax, esi |
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379 | pop eax |
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380 | jz .nomft |
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381 | jmp .mftscan |
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382 | @@: |
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383 | popad |
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384 | ret |
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385 | .errread: |
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386 | pop ecx |
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387 | .errret: |
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388 | stc |
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389 | popad |
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390 | ret |
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391 | .nomft: |
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392 | ; 1. Read file record. |
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393 | ; N.B. This will do recursive call of read_attr for $MFT::$Data. |
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394 | mov eax, [ntfs_cur_iRecord] |
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395 | mov [ntfs_attr_iRecord], eax |
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396 | and [ntfs_attr_list], 0 |
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257 | diamond | 397 | or dword [ntfs_attr_size], -1 |
398 | or dword [ntfs_attr_size+4], -1 |
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256 | diamond | 399 | or [ntfs_attr_iBaseRecord], -1 |
400 | call ntfs_read_file_record |
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401 | test eax, eax |
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402 | jz .errret |
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403 | ; 2. Find required attribute. |
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404 | mov eax, [ntfs_data.frs_buffer] |
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405 | ; a) For auxiliary records, read base record |
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406 | ; N.B. If base record is present, |
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407 | ; base iRecord may be 0 (for $Mft), but SequenceNumber is nonzero |
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408 | cmp dword [eax+24h], 0 |
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409 | jz @f |
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410 | mov eax, [eax+20h] |
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411 | ; test eax, eax |
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412 | ; jz @f |
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413 | .beginfindattr: |
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414 | mov [ntfs_attr_iRecord], eax |
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415 | call ntfs_read_file_record |
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416 | test eax, eax |
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417 | jz .errret |
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418 | @@: |
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419 | ; b) Scan for required attribute and for $ATTR_LIST |
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420 | mov eax, [ntfs_data.frs_buffer] |
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421 | movzx ecx, word [eax+14h] |
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422 | add eax, ecx |
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423 | mov ecx, [ntfs_cur_attr] |
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424 | and [ntfs_attr_offs], 0 |
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425 | .scanattr: |
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426 | cmp dword [eax], -1 |
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427 | jz .scandone |
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428 | cmp dword [eax], ecx |
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429 | jz .okattr |
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430 | cmp [ntfs_attr_iBaseRecord], -1 |
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431 | jnz .scancont |
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432 | cmp dword [eax], 0x20 ; $ATTR_LIST |
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433 | jnz .scancont |
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434 | mov [ntfs_attr_list], eax |
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435 | jmp .scancont |
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436 | .okattr: |
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437 | mov [ntfs_attr_offs], eax |
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438 | .scancont: |
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439 | add eax, [eax+4] |
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440 | jmp .scanattr |
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262 | diamond | 441 | .continue: |
442 | pushad |
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443 | and [ntfs_cur_read], 0 |
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256 | diamond | 444 | .scandone: |
445 | ; c) Check for required offset and length |
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446 | mov ecx, [ntfs_attr_offs] |
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447 | jecxz .noattr |
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265 | diamond | 448 | push [ntfs_cur_size] |
449 | push [ntfs_cur_read] |
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256 | diamond | 450 | call .doreadattr |
265 | diamond | 451 | pop edx |
452 | pop eax |
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256 | diamond | 453 | jc @f |
265 | diamond | 454 | cmp [ntfs_bCanContinue], 0 |
455 | jz @f |
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456 | sub edx, [ntfs_cur_read] |
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457 | neg edx |
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458 | shr edx, 9 |
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459 | sub eax, edx |
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460 | mov [ntfs_cur_size], eax |
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256 | diamond | 461 | jnz .not_in_cur |
462 | @@: |
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463 | popad |
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464 | ret |
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465 | .noattr: |
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466 | .not_in_cur: |
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467 | cmp [ntfs_cur_attr], 0x20 |
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468 | jz @f |
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469 | mov ecx, [ntfs_attr_list] |
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470 | test ecx, ecx |
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471 | jnz .lookattr |
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472 | .ret_is_attr: |
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473 | cmp [ntfs_attr_offs], 1 ; CF set <=> ntfs_attr_offs == 0 |
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474 | popad |
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475 | ret |
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476 | .lookattr: |
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477 | ; required attribute or required offset was not found in base record; |
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478 | ; it may be present in auxiliary records; |
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479 | ; scan $ATTR_LIST |
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480 | mov eax, [ntfs_attr_iBaseRecord] |
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481 | cmp eax, -1 |
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482 | jz @f |
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483 | call ntfs_read_file_record |
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484 | test eax, eax |
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485 | jz .errret |
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486 | or [ntfs_attr_iBaseRecord], -1 |
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487 | @@: |
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488 | push [ntfs_cur_offs] |
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489 | push [ntfs_cur_size] |
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490 | push [ntfs_cur_read] |
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491 | push [ntfs_cur_buf] |
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257 | diamond | 492 | push dword [ntfs_attr_size] |
493 | push dword [ntfs_attr_size+4] |
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494 | or dword [ntfs_attr_size], -1 |
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495 | or dword [ntfs_attr_size+4], -1 |
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256 | diamond | 496 | xor edx, edx |
497 | mov [ntfs_cur_offs], edx |
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498 | mov [ntfs_cur_size], 2 |
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499 | and [ntfs_cur_read], 0 |
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500 | mov [ntfs_cur_buf], ntfs_attrlist_buf |
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501 | push edx |
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502 | call .doreadattr |
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503 | pop edx |
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257 | diamond | 504 | pop dword [ntfs_attr_size+4] |
505 | pop dword [ntfs_attr_size] |
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256 | diamond | 506 | mov ebp, [ntfs_cur_read] |
507 | pop [ntfs_cur_buf] |
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508 | pop [ntfs_cur_read] |
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509 | pop [ntfs_cur_size] |
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510 | pop [ntfs_cur_offs] |
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511 | jc .errret |
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512 | mov esi, ntfs_attrlist_buf |
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513 | or edi, -1 |
||
514 | .scanliststart: |
||
515 | lea ebp, [ebp+esi-1Ah] |
||
516 | mov eax, [ntfs_cur_attr] |
||
517 | .scanlist: |
||
518 | cmp esi, ebp |
||
519 | jae .scanlistdone |
||
520 | cmp eax, [esi] |
||
521 | jz @f |
||
522 | .scanlistcont: |
||
523 | movzx ecx, word [esi+4] |
||
524 | add esi, ecx |
||
525 | jmp .scanlist |
||
526 | @@: |
||
527 | push eax |
||
528 | mov eax, [esi+8] |
||
257 | diamond | 529 | test eax, eax |
530 | jnz .testf |
||
531 | mov eax, dword [ntfs_attr_size] |
||
532 | and eax, dword [ntfs_attr_size+4] |
||
533 | cmp eax, -1 |
||
534 | jnz .testfz |
||
535 | ; if attribute is in auxiliary records, its size is defined only in first |
||
536 | mov eax, [esi+10h] |
||
537 | call ntfs_read_file_record |
||
538 | test eax, eax |
||
539 | jnz @f |
||
540 | .errret_pop: |
||
541 | pop eax |
||
542 | jmp .errret |
||
543 | @@: |
||
544 | mov eax, [ntfs_data.frs_buffer] |
||
545 | movzx ecx, word [eax+14h] |
||
546 | add eax, ecx |
||
547 | mov ecx, [ntfs_cur_attr] |
||
548 | @@: |
||
549 | cmp dword [eax], -1 |
||
550 | jz .errret_pop |
||
551 | cmp dword [eax], ecx |
||
552 | jz @f |
||
553 | add eax, [eax+4] |
||
554 | jmp @b |
||
555 | @@: |
||
556 | cmp byte [eax+8], 0 |
||
557 | jnz .sdnores |
||
558 | mov eax, [eax+10h] |
||
559 | mov dword [ntfs_attr_size], eax |
||
560 | and dword [ntfs_attr_size+4], 0 |
||
561 | jmp .testfz |
||
562 | .sdnores: |
||
563 | mov ecx, [eax+30h] |
||
564 | mov dword [ntfs_attr_size], ecx |
||
565 | mov ecx, [eax+34h] |
||
566 | mov dword [ntfs_attr_size+4], ecx |
||
567 | .testfz: |
||
568 | xor eax, eax |
||
569 | .testf: |
||
256 | diamond | 570 | imul eax, [ntfs_data.sectors_per_cluster] |
571 | cmp eax, [ntfs_cur_offs] |
||
572 | pop eax |
||
573 | ja @f |
||
574 | mov edi, [esi+10h] ; keep previous iRecord |
||
575 | jmp .scanlistcont |
||
576 | @@: |
||
257 | diamond | 577 | .scanlistfound: |
256 | diamond | 578 | cmp edi, -1 |
579 | jnz @f |
||
580 | popad |
||
581 | ret |
||
582 | @@: |
||
583 | mov eax, [ntfs_cur_iRecord] |
||
584 | mov [ntfs_attr_iBaseRecord], eax |
||
585 | mov eax, edi |
||
586 | jmp .beginfindattr |
||
257 | diamond | 587 | .sde: |
588 | popad |
||
589 | stc |
||
590 | ret |
||
256 | diamond | 591 | .scanlistdone: |
592 | sub ebp, ntfs_attrlist_buf-1Ah |
||
593 | test ebp, 1FFh |
||
257 | diamond | 594 | jnz .scanlistfound |
256 | diamond | 595 | test edx, edx |
596 | jnz @f |
||
597 | inc edx |
||
598 | cmp ebp, 0x400 |
||
257 | diamond | 599 | jnz .scanlistfound |
256 | diamond | 600 | @@: |
601 | inc edx |
||
602 | push esi edi |
||
603 | mov esi, ntfs_attrlist_buf+0x200 |
||
604 | mov edi, ntfs_attrlist_buf |
||
605 | mov ecx, 0x200/4 |
||
606 | rep movsd |
||
607 | pop edi esi |
||
608 | sub esi, 0x200 |
||
609 | push [ntfs_cur_offs] |
||
610 | push [ntfs_cur_size] |
||
611 | push [ntfs_cur_read] |
||
612 | push [ntfs_cur_buf] |
||
613 | mov [ntfs_cur_offs], edx |
||
614 | mov [ntfs_cur_size], 1 |
||
615 | and [ntfs_cur_read], 0 |
||
616 | mov [ntfs_cur_buf], ntfs_attrlist_buf+0x200 |
||
617 | push esi edx |
||
618 | call .doreadattr |
||
619 | pop edx esi |
||
620 | mov ebp, [ntfs_cur_read] |
||
621 | pop [ntfs_cur_buf] |
||
622 | pop [ntfs_cur_read] |
||
623 | pop [ntfs_cur_size] |
||
624 | pop [ntfs_cur_offs] |
||
625 | jc .errret |
||
626 | jmp .scanliststart |
||
627 | |||
628 | .doreadattr: |
||
265 | diamond | 629 | mov [ntfs_bCanContinue], 0 |
256 | diamond | 630 | cmp byte [ecx+8], 0 |
631 | jnz .nonresident |
||
632 | mov eax, [ecx+10h] ; length |
||
633 | mov esi, eax |
||
634 | mov edx, [ntfs_cur_offs] |
||
635 | shr eax, 9 |
||
636 | cmp eax, edx |
||
637 | jb .okret |
||
638 | shl edx, 9 |
||
639 | sub esi, edx |
||
640 | movzx eax, word [ecx+14h] |
||
641 | add edx, eax |
||
642 | add edx, ecx ; edx -> data |
||
643 | mov eax, [ntfs_cur_size] |
||
644 | cmp eax, (0xFFFFFFFF shr 9)+1 |
||
645 | jbe @f |
||
646 | mov eax, (0xFFFFFFFF shr 9)+1 |
||
647 | @@: |
||
648 | shl eax, 9 |
||
649 | cmp eax, esi |
||
650 | jbe @f |
||
651 | mov eax, esi |
||
652 | @@: |
||
653 | ; eax = length, edx -> data |
||
654 | mov [ntfs_cur_read], eax |
||
655 | mov ecx, eax |
||
656 | mov eax, edx |
||
657 | mov ebx, [ntfs_cur_buf] |
||
658 | call memmove |
||
257 | diamond | 659 | and [ntfs_cur_size], 0 ; CF=0 |
256 | diamond | 660 | ret |
661 | .nonresident: |
||
257 | diamond | 662 | ; Not all auxiliary records contain correct FileSize info |
663 | mov eax, dword [ntfs_attr_size] |
||
664 | mov edx, dword [ntfs_attr_size+4] |
||
665 | push eax |
||
666 | and eax, edx |
||
667 | cmp eax, -1 |
||
668 | pop eax |
||
669 | jnz @f |
||
256 | diamond | 670 | mov eax, [ecx+30h] ; FileSize |
671 | mov edx, [ecx+34h] |
||
257 | diamond | 672 | mov dword [ntfs_attr_size], eax |
673 | mov dword [ntfs_attr_size+4], edx |
||
674 | @@: |
||
256 | diamond | 675 | add eax, 0x1FF |
676 | adc edx, 0 |
||
677 | shrd eax, edx, 9 |
||
678 | sub eax, [ntfs_cur_offs] |
||
679 | ja @f |
||
680 | ; return with nothing read |
||
257 | diamond | 681 | and [ntfs_cur_size], 0 |
256 | diamond | 682 | .okret: |
683 | clc |
||
684 | ret |
||
685 | @@: |
||
686 | ; reduce read length |
||
262 | diamond | 687 | and [ntfs_cur_tail], 0 |
256 | diamond | 688 | cmp [ntfs_cur_size], eax |
689 | jb @f |
||
690 | mov [ntfs_cur_size], eax |
||
262 | diamond | 691 | mov eax, dword [ntfs_attr_size] |
692 | and eax, 0x1FF |
||
693 | mov [ntfs_cur_tail], eax |
||
256 | diamond | 694 | @@: |
695 | cmp [ntfs_cur_size], 0 |
||
696 | jz .okret |
||
697 | mov eax, [ntfs_cur_offs] |
||
698 | xor edx, edx |
||
699 | div [ntfs_data.sectors_per_cluster] |
||
700 | sub eax, [ecx+10h] ; first_vbo |
||
701 | jb .okret |
||
702 | ; eax = cluster, edx = starting sector |
||
703 | sub esp, 10h |
||
704 | movzx esi, word [ecx+20h] ; mcb_info_ofs |
||
705 | add esi, ecx |
||
706 | xor ebp, ebp |
||
707 | .readloop: |
||
708 | call ntfs_decode_mcb_entry |
||
709 | jnc .break |
||
710 | add ebp, [esp+8] |
||
711 | sub eax, [esp] |
||
712 | jae .readloop |
||
713 | push ecx |
||
714 | push eax |
||
715 | add eax, [esp+8] |
||
716 | add eax, ebp |
||
717 | imul eax, [ntfs_data.sectors_per_cluster] |
||
718 | add eax, edx |
||
719 | add eax, [PARTITION_START] |
||
720 | pop ecx |
||
721 | neg ecx |
||
722 | imul ecx, [ntfs_data.sectors_per_cluster] |
||
723 | sub ecx, edx |
||
724 | cmp ecx, [ntfs_cur_size] |
||
725 | jb @f |
||
726 | mov ecx, [ntfs_cur_size] |
||
727 | @@: |
||
728 | mov ebx, [ntfs_cur_buf] |
||
729 | @@: |
||
730 | call hd_read |
||
731 | cmp [hd_error], 0 |
||
732 | jnz .errread2 |
||
733 | add ebx, 0x200 |
||
734 | mov [ntfs_cur_buf], ebx |
||
735 | inc eax |
||
736 | add [ntfs_cur_read], 0x200 |
||
737 | dec [ntfs_cur_size] |
||
738 | inc [ntfs_cur_offs] |
||
739 | loop @b |
||
740 | pop ecx |
||
265 | diamond | 741 | xor eax, eax |
742 | xor edx, edx |
||
256 | diamond | 743 | cmp [ntfs_cur_size], 0 |
744 | jnz .readloop |
||
745 | add esp, 10h |
||
262 | diamond | 746 | mov eax, [ntfs_cur_tail] |
747 | test eax, eax |
||
748 | jz .okret |
||
749 | sub eax, 0x200 |
||
750 | add [ntfs_cur_read], eax |
||
256 | diamond | 751 | jmp .okret |
752 | .errread2: |
||
753 | pop ecx |
||
754 | add esp, 10h |
||
755 | jmp .errret |
||
756 | .break: |
||
757 | add esp, 10h ; CF=0 |
||
265 | diamond | 758 | mov [ntfs_bCanContinue], 1 |
256 | diamond | 759 | ret |
760 | |||
761 | ntfs_read_file_record: |
||
762 | ; in: eax=iRecord |
||
763 | ; out: [ntfs_data.frs_buffer] contains information |
||
764 | ; eax=0 - failed, eax=1 - success |
||
765 | ; Read attr $DATA of $Mft, starting from eax*[ntfs_data.frs_size] |
||
766 | push ecx edx |
||
767 | mov ecx, [ntfs_data.frs_size] |
||
768 | mul ecx |
||
769 | shrd eax, edx, 9 |
||
770 | shr edx, 9 |
||
771 | jnz .err |
||
265 | diamond | 772 | push [ntfs_attr_iRecord] |
773 | push [ntfs_attr_iBaseRecord] |
||
774 | push [ntfs_attr_offs] |
||
775 | push [ntfs_attr_list] |
||
776 | push dword [ntfs_attr_size+4] |
||
777 | push dword [ntfs_attr_size] |
||
256 | diamond | 778 | push [ntfs_cur_iRecord] |
779 | push [ntfs_cur_attr] |
||
780 | push [ntfs_cur_offs] |
||
781 | push [ntfs_cur_size] |
||
782 | push [ntfs_cur_buf] |
||
783 | push [ntfs_cur_read] |
||
784 | mov [ntfs_cur_attr], 0x80 ; $DATA |
||
785 | and [ntfs_cur_iRecord], 0 ; $Mft |
||
786 | mov [ntfs_cur_offs], eax |
||
787 | shr ecx, 9 |
||
788 | mov [ntfs_cur_size], ecx |
||
789 | mov eax, [ntfs_data.frs_buffer] |
||
790 | mov [ntfs_cur_buf], eax |
||
791 | call ntfs_read_attr |
||
792 | mov eax, [ntfs_cur_read] |
||
793 | pop [ntfs_cur_read] |
||
794 | pop [ntfs_cur_buf] |
||
795 | pop [ntfs_cur_size] |
||
796 | pop [ntfs_cur_offs] |
||
797 | pop [ntfs_cur_attr] |
||
798 | pop [ntfs_cur_iRecord] |
||
265 | diamond | 799 | pop dword [ntfs_attr_size] |
800 | pop dword [ntfs_attr_size+4] |
||
801 | pop [ntfs_attr_list] |
||
802 | pop [ntfs_attr_offs] |
||
803 | pop [ntfs_attr_iBaseRecord] |
||
804 | pop [ntfs_attr_iRecord] |
||
256 | diamond | 805 | pop edx ecx |
806 | jc .errret |
||
807 | cmp eax, [ntfs_data.frs_size] |
||
808 | jnz .errret |
||
809 | mov eax, [ntfs_data.frs_buffer] |
||
810 | cmp dword [eax], 'FILE' |
||
811 | jnz .errret |
||
812 | push ebx |
||
813 | mov ebx, eax |
||
814 | call ntfs_restore_usa_frs |
||
815 | pop ebx |
||
816 | setnc al |
||
817 | movzx eax, al |
||
818 | .ret: |
||
819 | ret |
||
820 | .err: |
||
821 | pop edx ecx |
||
822 | .errret: |
||
823 | xor eax, eax |
||
824 | ret |
||
825 | |||
826 | ntfs_restore_usa_frs: |
||
827 | mov eax, [ntfs_data.frs_size] |
||
828 | ntfs_restore_usa: |
||
829 | pushad |
||
830 | shr eax, 9 |
||
831 | mov ecx, eax |
||
832 | inc eax |
||
833 | cmp [ebx+6], ax |
||
834 | jnz .err |
||
835 | movzx eax, word [ebx+4] |
||
836 | lea esi, [eax+ebx] |
||
837 | lodsw |
||
838 | mov edx, eax |
||
839 | lea edi, [ebx+0x1FE] |
||
840 | @@: |
||
841 | cmp [edi], dx |
||
842 | jnz .err |
||
843 | lodsw |
||
844 | stosw |
||
845 | add edi, 0x1FE |
||
846 | loop @b |
||
847 | popad |
||
848 | clc |
||
849 | ret |
||
850 | .err: |
||
851 | popad |
||
852 | stc |
||
853 | ret |
||
854 | |||
855 | ntfs_decode_mcb_entry: |
||
856 | push eax ecx edi |
||
857 | lea edi, [esp+16] |
||
858 | xor eax, eax |
||
859 | lodsb |
||
860 | test al, al |
||
861 | jz .end |
||
862 | mov ecx, eax |
||
863 | and ecx, 0xF |
||
864 | cmp ecx, 8 |
||
865 | ja .end |
||
866 | push ecx |
||
867 | rep movsb |
||
868 | pop ecx |
||
869 | sub ecx, 8 |
||
870 | neg ecx |
||
871 | cmp byte [esi-1], 80h |
||
872 | jae .end |
||
873 | push eax |
||
874 | xor eax, eax |
||
875 | rep stosb |
||
876 | pop ecx |
||
877 | shr ecx, 4 |
||
878 | cmp ecx, 8 |
||
879 | ja .end |
||
880 | push ecx |
||
881 | rep movsb |
||
882 | pop ecx |
||
883 | sub ecx, 8 |
||
884 | neg ecx |
||
885 | cmp byte [esi-1], 80h |
||
257 | diamond | 886 | cmc |
256 | diamond | 887 | sbb eax, eax |
888 | rep stosb |
||
889 | stc |
||
890 | .end: |
||
891 | pop edi ecx eax |
||
892 | ret |
||
893 | |||
257 | diamond | 894 | ntfs_find_lfn: |
895 | ; in: esi->name |
||
896 | ; out: CF=1 - file not found |
||
262 | diamond | 897 | ; else CF=0, [ntfs_cur_iRecord] valid, eax->record in parent directory |
257 | diamond | 898 | mov [ntfs_cur_iRecord], 5 ; start parse from root cluster |
899 | .doit2: |
||
900 | mov [ntfs_cur_attr], 0x90 ; $INDEX_ROOT |
||
901 | and [ntfs_cur_offs], 0 |
||
902 | mov eax, [ntfs_data.cur_index_size] |
||
903 | mov [ntfs_cur_size], eax |
||
904 | mov eax, [ntfs_data.cur_index_buf] |
||
905 | mov [ntfs_cur_buf], eax |
||
906 | call ntfs_read_attr |
||
907 | jnc @f |
||
908 | .ret: |
||
909 | ret |
||
910 | @@: |
||
911 | cmp [ntfs_cur_read], 0x20 |
||
912 | jc .ret |
||
913 | pushad |
||
914 | mov esi, [ntfs_data.cur_index_buf] |
||
915 | mov eax, [esi+14h] |
||
916 | add eax, 10h |
||
917 | cmp [ntfs_cur_read], eax |
||
918 | jae .readok1 |
||
919 | add eax, 1FFh |
||
920 | shr eax, 9 |
||
921 | cmp eax, [ntfs_data.cur_index_size] |
||
922 | ja @f |
||
923 | .stc_ret: |
||
924 | popad |
||
925 | stc |
||
926 | ret |
||
927 | @@: |
||
928 | ; reallocate |
||
929 | push eax |
||
930 | push [ntfs_data.cur_index_buf] |
||
931 | call kernel_free |
||
932 | pop eax |
||
933 | mov [ntfs_data.cur_index_size], eax |
||
934 | push eax |
||
935 | call kernel_alloc |
||
936 | test eax, eax |
||
937 | jnz @f |
||
938 | and [ntfs_data.cur_index_size], 0 |
||
939 | and [ntfs_data.cur_index_buf], 0 |
||
940 | jmp .stc_ret |
||
941 | @@: |
||
942 | mov [ntfs_data.cur_index_buf], eax |
||
943 | popad |
||
944 | jmp .doit2 |
||
945 | .readok1: |
||
946 | mov ebp, [esi+8] ; subnode_size |
||
947 | shr ebp, 9 |
||
948 | cmp ebp, [ntfs_data.cur_index_size] |
||
949 | jbe .ok2 |
||
950 | push esi ebp |
||
951 | push ebp |
||
952 | call kernel_alloc |
||
953 | pop ebp esi |
||
954 | test eax, eax |
||
955 | jz .stc_ret |
||
956 | mov edi, eax |
||
957 | mov ecx, [ntfs_data.cur_index_size] |
||
958 | shl ecx, 9-2 |
||
959 | rep movsd |
||
960 | mov esi, eax |
||
961 | mov [ntfs_data.cur_index_size], ebp |
||
962 | push esi ebp |
||
963 | push [ntfs_data.cur_index_buf] |
||
964 | call kernel_free |
||
965 | pop ebp esi |
||
966 | mov [ntfs_data.cur_index_buf], esi |
||
967 | .ok2: |
||
968 | add esi, 10h |
||
969 | mov edi, [esp+4] |
||
970 | ; edi -> name, esi -> current index data, ebp = subnode size |
||
971 | .scanloop: |
||
972 | add esi, [esi] |
||
973 | .scanloopint: |
||
974 | test byte [esi+0Ch], 2 |
||
975 | jnz .subnode |
||
976 | push esi |
||
977 | add esi, 0x52 |
||
978 | movzx ecx, byte [esi-2] |
||
979 | push edi |
||
980 | @@: |
||
981 | lodsw |
||
982 | call uni2ansi_char |
||
983 | call char_toupper |
||
984 | push eax |
||
985 | mov al, [edi] |
||
986 | inc edi |
||
987 | call char_toupper |
||
988 | cmp al, [esp] |
||
989 | pop eax |
||
990 | loopz @b |
||
991 | jz .found |
||
992 | pop edi |
||
993 | pop esi |
||
994 | jb .subnode |
||
995 | .scanloopcont: |
||
996 | movzx eax, word [esi+8] |
||
997 | add esi, eax |
||
998 | jmp .scanloopint |
||
999 | .subnode: |
||
1000 | test byte [esi+0Ch], 1 |
||
1001 | jz .notfound |
||
1002 | movzx eax, word [esi+8] |
||
1003 | mov eax, [esi+eax-8] |
||
1004 | mul [ntfs_data.sectors_per_cluster] |
||
1005 | mov [ntfs_cur_offs], eax |
||
1006 | mov [ntfs_cur_attr], 0xA0 ; $INDEX_ALLOCATION |
||
1007 | mov [ntfs_cur_size], ebp |
||
1008 | mov eax, [ntfs_data.cur_index_buf] |
||
1009 | mov esi, eax |
||
1010 | mov [ntfs_cur_buf], eax |
||
1011 | call ntfs_read_attr |
||
1012 | mov eax, ebp |
||
1013 | shl eax, 9 |
||
1014 | cmp [ntfs_cur_read], eax |
||
1015 | jnz .notfound |
||
1016 | cmp dword [esi], 'INDX' |
||
1017 | jnz .notfound |
||
1018 | mov ebx, esi |
||
1019 | call ntfs_restore_usa |
||
1020 | jc .notfound |
||
1021 | add esi, 0x18 |
||
1022 | jmp .scanloop |
||
1023 | .notfound: |
||
1024 | popad |
||
1025 | stc |
||
1026 | ret |
||
1027 | .found: |
||
1028 | cmp byte [edi], 0 |
||
1029 | jz .done |
||
1030 | cmp byte [edi], '/' |
||
1031 | jz .next |
||
1032 | pop edi |
||
1033 | pop esi |
||
1034 | jmp .scanloopcont |
||
1035 | .done: |
||
1036 | .next: |
||
1037 | pop esi |
||
1038 | pop esi |
||
1039 | mov eax, [esi] |
||
1040 | mov [ntfs_cur_iRecord], eax |
||
262 | diamond | 1041 | mov [esp+1Ch], esi |
257 | diamond | 1042 | mov [esp+4], edi |
1043 | popad |
||
1044 | inc esi |
||
1045 | cmp byte [esi-1], 0 |
||
1046 | jnz .doit2 |
||
1047 | ret |
||
1048 | |||
256 | diamond | 1049 | ;---------------------------------------------------------------- |
1050 | ; |
||
1051 | ; ntfs_HdRead - read NTFS hard disk |
||
1052 | ; |
||
1053 | ; esi points to filename |
||
1054 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1055 | ; may be ebx=0 - start from first byte |
||
1056 | ; ecx number of bytes to read, 0+ |
||
1057 | ; edx mem location to return data |
||
1058 | ; |
||
1059 | ; ret ebx = bytes read or 0xffffffff file not found |
||
1060 | ; eax = 0 ok read or other = errormsg |
||
1061 | ; |
||
1062 | ;-------------------------------------------------------------- |
||
1063 | ntfs_HdRead: |
||
262 | diamond | 1064 | cmp byte [esi], 0 |
1065 | jnz @f |
||
256 | diamond | 1066 | or ebx, -1 |
262 | diamond | 1067 | push ERROR_ACCESS_DENIED |
1068 | pop eax |
||
256 | diamond | 1069 | ret |
262 | diamond | 1070 | @@: |
1071 | call ntfs_find_lfn |
||
1072 | jnc .found |
||
1073 | or ebx, -1 |
||
1074 | push ERROR_FILE_NOT_FOUND |
||
1075 | pop eax |
||
1076 | ret |
||
1077 | .found: |
||
1078 | mov [ntfs_cur_attr], 0x80 ; $DATA |
||
1079 | and [ntfs_cur_offs], 0 |
||
1080 | and [ntfs_cur_size], 0 |
||
1081 | call ntfs_read_attr |
||
1082 | jnc @f |
||
1083 | or ebx, -1 |
||
1084 | push ERROR_ACCESS_DENIED |
||
1085 | pop eax |
||
1086 | ret |
||
1087 | @@: |
||
1088 | pushad |
||
1089 | and dword [esp+10h], 0 |
||
1090 | xor eax, eax |
||
1091 | test ebx, ebx |
||
1092 | jz .zero1 |
||
1093 | cmp dword [ebx+4], 0x200 |
||
1094 | jb @f |
||
1095 | .eof0: |
||
1096 | popad |
||
1097 | xor ebx, ebx |
||
1098 | .eof: |
||
1099 | push ERROR_END_OF_FILE |
||
1100 | pop eax |
||
1101 | ret |
||
1102 | @@: |
||
1103 | mov eax, [ebx] |
||
1104 | test eax, 0x1FF |
||
1105 | jz .alignedstart |
||
1106 | push edx |
||
1107 | mov edx, [ebx+4] |
||
1108 | shrd eax, edx, 9 |
||
1109 | pop edx |
||
1110 | mov [ntfs_cur_offs], eax |
||
1111 | mov [ntfs_cur_size], 1 |
||
1112 | mov [ntfs_cur_buf], ntfs_bitmap_buf |
||
1113 | call ntfs_read_attr.continue |
||
1114 | mov eax, [ebx] |
||
1115 | and eax, 0x1FF |
||
1116 | lea esi, [ntfs_bitmap_buf+eax] |
||
1117 | sub eax, [ntfs_cur_read] |
||
1118 | jae .eof0 |
||
1119 | neg eax |
||
1120 | push ecx |
||
1121 | cmp ecx, eax |
||
1122 | jb @f |
||
1123 | mov ecx, eax |
||
1124 | @@: |
||
1125 | mov [esp+10h+4], ecx |
||
1126 | mov edi, edx |
||
1127 | rep movsb |
||
1128 | mov edx, edi |
||
1129 | pop ecx |
||
1130 | sub ecx, [esp+10h] |
||
1131 | jnz @f |
||
1132 | .retok: |
||
1133 | popad |
||
1134 | xor eax, eax |
||
1135 | ret |
||
1136 | @@: |
||
1137 | cmp [ntfs_cur_read], 0x200 |
||
1138 | jz .alignedstart |
||
1139 | .eof_ebx: |
||
1140 | popad |
||
1141 | jmp .eof |
||
1142 | .alignedstart: |
||
1143 | mov eax, [ebx] |
||
1144 | push edx |
||
1145 | mov edx, [ebx+4] |
||
1146 | add eax, 511 |
||
1147 | adc edx, 0 |
||
1148 | shrd eax, edx, 9 |
||
1149 | pop edx |
||
1150 | .zero1: |
||
1151 | mov [ntfs_cur_offs], eax |
||
1152 | mov [ntfs_cur_buf], edx |
||
1153 | mov eax, ecx |
||
1154 | shr eax, 9 |
||
1155 | mov [ntfs_cur_size], eax |
||
1156 | add eax, [ntfs_cur_offs] |
||
1157 | push eax |
||
1158 | call ntfs_read_attr.continue |
||
1159 | pop [ntfs_cur_offs] |
||
1160 | mov eax, [ntfs_cur_read] |
||
1161 | add [esp+10h], eax |
||
1162 | mov eax, ecx |
||
1163 | and eax, not 0x1FF |
||
1164 | cmp [ntfs_cur_read], eax |
||
1165 | jnz .eof_ebx |
||
1166 | and ecx, 0x1FF |
||
1167 | jz .retok |
||
1168 | add edx, [ntfs_cur_read] |
||
1169 | mov [ntfs_cur_size], 1 |
||
1170 | mov [ntfs_cur_buf], ntfs_bitmap_buf |
||
1171 | call ntfs_read_attr.continue |
||
1172 | cmp [ntfs_cur_read], ecx |
||
1173 | jb @f |
||
1174 | mov [ntfs_cur_read], ecx |
||
1175 | @@: |
||
1176 | xchg ecx, [ntfs_cur_read] |
||
1177 | push ecx |
||
1178 | mov edi, edx |
||
1179 | mov esi, ntfs_bitmap_buf |
||
1180 | add [esp+10h+4], ecx |
||
1181 | rep movsb |
||
1182 | pop ecx |
||
1183 | xor eax, eax |
||
1184 | cmp ecx, [ntfs_cur_read] |
||
1185 | jz @f |
||
1186 | mov al, ERROR_END_OF_FILE |
||
1187 | @@: |
||
1188 | mov [esp+1Ch], eax |
||
1189 | popad |
||
1190 | ret |
||
256 | diamond | 1191 | |
1192 | ;---------------------------------------------------------------- |
||
1193 | ; |
||
1194 | ; ntfs_HdReadFolder - read NTFS hard disk folder |
||
1195 | ; |
||
1196 | ; esi points to filename |
||
1197 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
||
1198 | ; & flags (bitfields) |
||
1199 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
1200 | ; ecx number of blocks to read, 0+ |
||
1201 | ; edx mem location to return data |
||
1202 | ; |
||
1203 | ; ret ebx = blocks read or 0xffffffff folder not found |
||
1204 | ; eax = 0 ok read or other = errormsg |
||
1205 | ; |
||
1206 | ;-------------------------------------------------------------- |
||
1207 | ntfs_HdReadFolder: |
||
1208 | mov eax, 5 ; root cluster |
||
1209 | cmp byte [esi], 0 |
||
1210 | jz .doit |
||
257 | diamond | 1211 | call ntfs_find_lfn |
1212 | jnc .doit2 |
||
256 | diamond | 1213 | .notfound: |
1214 | or ebx, -1 |
||
1215 | push ERROR_FILE_NOT_FOUND |
||
1216 | .pop_ret: |
||
1217 | pop eax |
||
1218 | ret |
||
1219 | .doit: |
||
1220 | mov [ntfs_cur_iRecord], eax |
||
1221 | .doit2: |
||
257 | diamond | 1222 | mov [ntfs_cur_attr], 0x10 ; $STANDARD_INFORMATION |
1223 | and [ntfs_cur_offs], 0 |
||
1224 | mov [ntfs_cur_size], 1 |
||
1225 | mov [ntfs_cur_buf], ntfs_bitmap_buf |
||
1226 | call ntfs_read_attr |
||
1227 | jc .notfound |
||
256 | diamond | 1228 | mov [ntfs_cur_attr], 0x90 ; $INDEX_ROOT |
1229 | and [ntfs_cur_offs], 0 |
||
1230 | mov eax, [ntfs_data.cur_index_size] |
||
1231 | mov [ntfs_cur_size], eax |
||
1232 | mov eax, [ntfs_data.cur_index_buf] |
||
1233 | mov [ntfs_cur_buf], eax |
||
1234 | call ntfs_read_attr |
||
1235 | jnc .ok |
||
1236 | cmp [hd_error], 0 |
||
1237 | jz .notfound |
||
1238 | or ebx, -1 |
||
1239 | push 11 |
||
1240 | jmp .pop_ret |
||
1241 | .ok: |
||
1242 | cmp [ntfs_cur_read], 0x20 |
||
1243 | jae @f |
||
1244 | or ebx, -1 |
||
1245 | .fserr: |
||
1246 | push ERROR_FAT_TABLE |
||
1247 | jmp .pop_ret |
||
1248 | @@: |
||
1249 | pushad |
||
1250 | mov esi, [ntfs_data.cur_index_buf] |
||
1251 | mov eax, [esi+14h] |
||
1252 | add eax, 10h |
||
1253 | cmp [ntfs_cur_read], eax |
||
1254 | jae .readok1 |
||
1255 | add eax, 1FFh |
||
1256 | shr eax, 9 |
||
1257 | cmp eax, [ntfs_data.cur_index_size] |
||
1258 | ja @f |
||
1259 | popad |
||
1260 | jmp .fserr |
||
1261 | @@: |
||
1262 | ; reallocate |
||
1263 | push eax |
||
1264 | push [ntfs_data.cur_index_buf] |
||
1265 | call kernel_free |
||
1266 | pop eax |
||
1267 | mov [ntfs_data.cur_index_size], eax |
||
1268 | push eax |
||
1269 | call kernel_alloc |
||
1270 | test eax, eax |
||
1271 | jnz @f |
||
1272 | and [ntfs_data.cur_index_size], 0 |
||
1273 | and [ntfs_data.cur_index_buf], 0 |
||
1274 | .nomem: |
||
1275 | popad |
||
1276 | or ebx, -1 |
||
1277 | push 12 |
||
1278 | pop eax |
||
1279 | ret |
||
1280 | @@: |
||
1281 | mov [ntfs_data.cur_index_buf], eax |
||
1282 | popad |
||
1283 | jmp .doit2 |
||
1284 | .readok1: |
||
1285 | mov ebp, [esi+8] ; subnode_size |
||
1286 | shr ebp, 9 |
||
1287 | cmp ebp, [ntfs_data.cur_index_size] |
||
1288 | jbe .ok2 |
||
1289 | push esi ebp |
||
1290 | push ebp |
||
1291 | call kernel_alloc |
||
1292 | pop ebp esi |
||
1293 | test eax, eax |
||
1294 | jz .nomem |
||
1295 | mov edi, eax |
||
1296 | mov ecx, [ntfs_data.cur_index_size] |
||
1297 | shl ecx, 9-2 |
||
1298 | rep movsd |
||
1299 | mov esi, eax |
||
1300 | mov [ntfs_data.cur_index_size], ebp |
||
1301 | push esi ebp |
||
1302 | push [ntfs_data.cur_index_buf] |
||
1303 | call kernel_free |
||
1304 | pop ebp esi |
||
1305 | mov [ntfs_data.cur_index_buf], esi |
||
1306 | .ok2: |
||
1307 | add esi, 10h |
||
1308 | mov ebx, [esp+10h] |
||
1309 | mov edx, [esp+14h] |
||
1310 | push dword [ebx+4] ; read ANSI/UNICODE name |
||
1311 | mov ebx, [ebx] |
||
1312 | ; init header |
||
1313 | mov edi, edx |
||
1314 | mov ecx, 32/4 |
||
1315 | xor eax, eax |
||
1316 | rep stosd |
||
1317 | mov byte [edx], 1 ; version |
||
1318 | mov ecx, [esp+4+18h] |
||
1319 | push edx |
||
1320 | mov edx, esp |
||
1321 | ; edi -> BDFE, esi -> current index data, ebp = subnode size, ebx = first wanted block, |
||
1322 | ; ecx = number of blocks to read |
||
1323 | ; edx -> parameters block: dd |
||
257 | diamond | 1324 | cmp [ntfs_cur_iRecord], 5 |
1325 | jz .skip_specials |
||
1326 | ; dot and dotdot entries |
||
1327 | push esi |
||
1328 | xor esi, esi |
||
1329 | call .add_special_entry |
||
1330 | inc esi |
||
1331 | call .add_special_entry |
||
1332 | pop esi |
||
1333 | .skip_specials: |
||
256 | diamond | 1334 | ; at first, dump index root |
1335 | add esi, [esi] |
||
1336 | .dump_root: |
||
1337 | test byte [esi+0Ch], 2 |
||
1338 | jnz .dump_root_done |
||
1339 | call .add_entry |
||
1340 | movzx eax, word [esi+8] |
||
1341 | add esi, eax |
||
1342 | jmp .dump_root |
||
1343 | .dump_root_done: |
||
1344 | ; now dump all subnodes |
||
1345 | push ecx edi |
||
1346 | mov edi, ntfs_bitmap_buf |
||
1347 | mov [ntfs_cur_buf], edi |
||
1348 | mov ecx, 0x400/4 |
||
1349 | xor eax, eax |
||
1350 | rep stosd |
||
1351 | mov [ntfs_cur_attr], 0xB0 ; $BITMAP |
||
1352 | and [ntfs_cur_offs], 0 |
||
1353 | mov [ntfs_cur_size], 2 |
||
1354 | call ntfs_read_attr |
||
1355 | pop edi ecx |
||
1356 | push 0 ; save offset in $BITMAP attribute |
||
1357 | and [ntfs_cur_offs], 0 |
||
1358 | .dumploop: |
||
1359 | mov [ntfs_cur_attr], 0xA0 |
||
1360 | mov [ntfs_cur_size], ebp |
||
1361 | mov eax, [ntfs_data.cur_index_buf] |
||
1362 | mov esi, eax |
||
1363 | mov [ntfs_cur_buf], eax |
||
1364 | push [ntfs_cur_offs] |
||
257 | diamond | 1365 | mov eax, [ntfs_cur_offs] |
1366 | imul eax, ebp |
||
1367 | mov [ntfs_cur_offs], eax |
||
256 | diamond | 1368 | call ntfs_read_attr |
1369 | pop [ntfs_cur_offs] |
||
1370 | mov eax, ebp |
||
1371 | shl eax, 9 |
||
1372 | cmp [ntfs_cur_read], eax |
||
1373 | jnz .done |
||
1374 | push eax |
||
1375 | mov eax, [ntfs_cur_offs] |
||
1376 | and eax, 0x400*8-1 |
||
1377 | bt dword [ntfs_bitmap_buf], eax |
||
1378 | pop eax |
||
1379 | jnc .dump_subnode_done |
||
1380 | cmp dword [esi], 'INDX' |
||
1381 | jnz .dump_subnode_done |
||
1382 | push ebx |
||
1383 | mov ebx, esi |
||
1384 | call ntfs_restore_usa |
||
1385 | pop ebx |
||
1386 | jc .dump_subnode_done |
||
1387 | add esi, 0x18 |
||
1388 | add esi, [esi] |
||
1389 | .dump_subnode: |
||
1390 | test byte [esi+0Ch], 2 |
||
1391 | jnz .dump_subnode_done |
||
1392 | call .add_entry |
||
1393 | movzx eax, word [esi+8] |
||
1394 | add esi, eax |
||
1395 | jmp .dump_subnode |
||
1396 | .dump_subnode_done: |
||
1397 | inc [ntfs_cur_offs] |
||
1398 | test [ntfs_cur_offs], 0x400*8-1 |
||
1399 | jnz .dumploop |
||
1400 | mov [ntfs_cur_attr], 0xB0 |
||
1401 | push ecx edi |
||
1402 | mov edi, ntfs_bitmap_buf |
||
1403 | mov [ntfs_cur_buf], edi |
||
1404 | mov ecx, 0x400/4 |
||
1405 | xor eax, eax |
||
1406 | rep stosd |
||
1407 | pop edi ecx |
||
1408 | pop eax |
||
1409 | push [ntfs_cur_offs] |
||
1410 | inc eax |
||
1411 | mov [ntfs_cur_offs], eax |
||
1412 | mov [ntfs_cur_size], 2 |
||
1413 | push eax |
||
1414 | call ntfs_read_attr |
||
1415 | pop eax |
||
1416 | pop [ntfs_cur_offs] |
||
1417 | push eax |
||
1418 | jmp .dumploop |
||
1419 | .done: |
||
1420 | pop eax |
||
1421 | pop edx |
||
1422 | mov ebx, [edx+4] |
||
1423 | pop edx |
||
1424 | xor eax, eax |
||
1425 | dec ecx |
||
1426 | js @f |
||
1427 | mov al, ERROR_END_OF_FILE |
||
1428 | @@: |
||
1429 | mov [esp+1Ch], eax |
||
1430 | mov [esp+10h], ebx |
||
1431 | popad |
||
1432 | ret |
||
1433 | |||
257 | diamond | 1434 | .add_special_entry: |
1435 | mov eax, [edx] |
||
1436 | inc dword [eax+8] ; new file found |
||
1437 | dec ebx |
||
1438 | jns .ret |
||
1439 | dec ecx |
||
1440 | js .ret |
||
1441 | inc dword [eax+4] ; new file block copied |
||
1442 | mov eax, [edx+4] |
||
1443 | mov [edi+4], eax |
||
1444 | ; mov eax, dword [ntfs_bitmap_buf+0x20] |
||
1445 | ; or al, 0x10 |
||
1446 | mov eax, 0x10 |
||
1447 | stosd |
||
1448 | scasd |
||
1449 | push edx |
||
1450 | mov eax, dword [ntfs_bitmap_buf] |
||
1451 | mov edx, dword [ntfs_bitmap_buf+4] |
||
1452 | call ntfs_datetime_to_bdfe |
||
1453 | mov eax, dword [ntfs_bitmap_buf+0x18] |
||
1454 | mov edx, dword [ntfs_bitmap_buf+0x1C] |
||
1455 | call ntfs_datetime_to_bdfe |
||
1456 | mov eax, dword [ntfs_bitmap_buf+8] |
||
1457 | mov edx, dword [ntfs_bitmap_buf+0xC] |
||
1458 | call ntfs_datetime_to_bdfe |
||
1459 | pop edx |
||
1460 | xor eax, eax |
||
1461 | stosd |
||
1462 | stosd |
||
1463 | mov al, '.' |
||
1464 | push edi ecx |
||
1465 | lea ecx, [esi+1] |
||
1466 | test byte [edi-0x24], 1 |
||
1467 | jz @f |
||
1468 | rep stosw |
||
1469 | pop ecx |
||
1470 | xor eax, eax |
||
1471 | stosw |
||
1472 | pop edi |
||
1473 | add edi, 520 |
||
1474 | ret |
||
1475 | @@: |
||
1476 | rep stosb |
||
1477 | pop ecx |
||
1478 | xor eax, eax |
||
1479 | stosb |
||
1480 | pop edi |
||
1481 | add edi, 264 |
||
1482 | .ret: |
||
1483 | ret |
||
1484 | |||
256 | diamond | 1485 | .add_entry: |
1486 | ; do not return DOS 8.3 names |
||
1487 | cmp byte [esi+0x51], 2 |
||
1488 | jz .ret |
||
1489 | ; do not return system files |
||
1490 | ; ... note that there will be no bad effects if system files also were reported ... |
||
1491 | cmp dword [esi], 0x10 |
||
1492 | jb .ret |
||
1493 | mov eax, [edx] |
||
1494 | inc dword [eax+8] ; new file found |
||
1495 | dec ebx |
||
1496 | jns .ret |
||
1497 | dec ecx |
||
1498 | js .ret |
||
1499 | inc dword [eax+4] ; new file block copied |
||
1500 | mov eax, [edx+4] ; flags |
||
262 | diamond | 1501 | call ntfs_direntry_to_bdfe |
256 | diamond | 1502 | push ecx esi edi |
1503 | movzx ecx, byte [esi+0x50] |
||
1504 | add esi, 0x52 |
||
1505 | test byte [edi-0x24], 1 |
||
1506 | jz .ansi |
||
1507 | shr ecx, 1 |
||
1508 | rep movsd |
||
1509 | adc ecx, ecx |
||
1510 | rep movsw |
||
1511 | and word [edi], 0 |
||
1512 | pop edi |
||
1513 | add edi, 520 |
||
1514 | pop esi ecx |
||
1515 | ret |
||
1516 | .ansi: |
||
1517 | jecxz .skip |
||
1518 | @@: |
||
1519 | lodsw |
||
1520 | call uni2ansi_char |
||
1521 | stosb |
||
1522 | loop @b |
||
1523 | .skip: |
||
1524 | xor al, al |
||
1525 | stosb |
||
1526 | pop edi |
||
1527 | add edi, 264 |
||
1528 | pop esi ecx |
||
1529 | ret |
||
1530 | |||
262 | diamond | 1531 | ntfs_direntry_to_bdfe: |
1532 | mov [edi+4], eax ; ANSI/UNICODE name |
||
1533 | mov eax, [esi+48h] |
||
1534 | test eax, 0x10000000 |
||
1535 | jz @f |
||
1536 | and eax, not 0x10000000 |
||
1537 | or al, 0x10 |
||
1538 | @@: |
||
1539 | stosd |
||
1540 | scasd |
||
1541 | push edx |
||
1542 | mov eax, [esi+0x18] |
||
1543 | mov edx, [esi+0x1C] |
||
1544 | call ntfs_datetime_to_bdfe |
||
1545 | mov eax, [esi+0x30] |
||
1546 | mov edx, [esi+0x34] |
||
1547 | call ntfs_datetime_to_bdfe |
||
1548 | mov eax, [esi+0x20] |
||
1549 | mov edx, [esi+0x24] |
||
1550 | call ntfs_datetime_to_bdfe |
||
1551 | pop edx |
||
1552 | mov eax, [esi+0x40] |
||
1553 | stosd |
||
1554 | mov eax, [esi+0x44] |
||
1555 | stosd |
||
1556 | ret |
||
1557 | |||
256 | diamond | 1558 | iglobal |
1559 | _24 dd 24 |
||
1560 | _60 dd 60 |
||
1561 | _10000000 dd 10000000 |
||
1562 | days400year dd 365*400+100-4+1 |
||
1563 | days100year dd 365*100+25-1 |
||
1564 | days4year dd 365*4+1 |
||
1565 | days1year dd 365 |
||
1566 | months dd 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 |
||
1567 | months2 dd 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 |
||
1568 | _400 dd 400 |
||
1569 | _100 dd 100 |
||
1570 | endg |
||
1571 | |||
1572 | ntfs_datetime_to_bdfe: |
||
1573 | ; edx:eax = number of 100-nanosecond intervals since January 1, 1601, in UTC |
||
1574 | push eax |
||
1575 | mov eax, edx |
||
1576 | xor edx, edx |
||
1577 | div [_10000000] |
||
1578 | xchg eax, [esp] |
||
1579 | div [_10000000] |
||
1580 | pop edx |
||
1581 | ; edx:eax = number of seconds since January 1, 1601 |
||
1582 | push eax |
||
1583 | mov eax, edx |
||
1584 | xor edx, edx |
||
1585 | div [_60] |
||
1586 | xchg eax, [esp] |
||
1587 | div [_60] |
||
1588 | mov [edi], dl |
||
1589 | pop edx |
||
1590 | ; edx:eax = number of minutes |
||
1591 | div [_60] |
||
1592 | mov [edi+1], dl |
||
1593 | ; eax = number of hours (note that 2^64/(10^7*60*60) < 2^32) |
||
1594 | xor edx, edx |
||
1595 | div [_24] |
||
1596 | mov [edi+2], dl |
||
1597 | mov [edi+3], byte 0 |
||
1598 | ; eax = number of days since January 1, 1601 |
||
1599 | xor edx, edx |
||
1600 | div [days400year] |
||
1601 | imul eax, 400 |
||
1602 | add eax, 1601 |
||
1603 | mov [edi+6], ax |
||
1604 | mov eax, edx |
||
1605 | xor edx, edx |
||
1606 | div [days100year] |
||
1607 | cmp al, 4 |
||
1608 | jnz @f |
||
1609 | dec eax |
||
1610 | add edx, [days100year] |
||
1611 | @@: |
||
1612 | imul eax, 100 |
||
1613 | add [edi+6], ax |
||
1614 | mov eax, edx |
||
1615 | xor edx, edx |
||
1616 | div [days4year] |
||
1617 | shl eax, 2 |
||
1618 | add [edi+6], ax |
||
1619 | mov eax, edx |
||
1620 | xor edx, edx |
||
1621 | div [days1year] |
||
1622 | cmp al, 4 |
||
1623 | jnz @f |
||
1624 | dec eax |
||
1625 | add edx, [days1year] |
||
1626 | @@: |
||
1627 | add [edi+6], ax |
||
1628 | push esi edx |
||
1629 | mov esi, months |
||
1630 | movzx eax, word [edi+6] |
||
1631 | test al, 3 |
||
1632 | jnz .noleap |
||
1633 | xor edx, edx |
||
1634 | push eax |
||
1635 | div [_400] |
||
1636 | pop eax |
||
1637 | test edx, edx |
||
1638 | jz .leap |
||
1639 | xor edx, edx |
||
1640 | div [_100] |
||
1641 | test edx, edx |
||
1642 | jz .noleap |
||
1643 | .leap: |
||
1644 | mov esi, months2 |
||
1645 | .noleap: |
||
1646 | pop edx |
||
1647 | xor eax, eax |
||
1648 | inc eax |
||
1649 | @@: |
||
1650 | sub edx, [esi] |
||
1651 | jb @f |
||
1652 | add esi, 4 |
||
1653 | inc eax |
||
1654 | jmp @b |
||
1655 | @@: |
||
1656 | add edx, [esi] |
||
1657 | pop esi |
||
1658 | inc edx |
||
1659 | mov [edi+4], dl |
||
1660 | mov [edi+5], al |
||
1661 | add edi, 8 |
||
1662 | ret |
||
1663 | |||
1664 | ;---------------------------------------------------------------- |
||
1665 | ; |
||
1666 | ; ntfs_HdRewrite - write to NTFS hard disk |
||
1667 | ; |
||
1668 | ; esi points to filename |
||
1669 | ; ebx ignored (reserved) |
||
1670 | ; ecx number of bytes to write, 0+ |
||
1671 | ; edx mem location to data |
||
1672 | ; |
||
1673 | ; ret ebx = number of written bytes |
||
1674 | ; eax = 0 ok read or other = errormsg |
||
1675 | ; |
||
1676 | ;-------------------------------------------------------------- |
||
1677 | ntfs_HdRewrite: |
||
1678 | xor ebx, ebx |
||
1679 | mov eax, ERROR_UNSUPPORTED_FS |
||
1680 | ret |
||
1681 | |||
1682 | ;---------------------------------------------------------------- |
||
1683 | ; |
||
1684 | ; ntfs_HdWrite - write to NTFS hard disk |
||
1685 | ; |
||
1686 | ; esi points to filename |
||
1687 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1688 | ; may be ebx=0 - start from first byte |
||
1689 | ; ecx number of bytes to write, 0+ |
||
1690 | ; edx mem location to data |
||
1691 | ; |
||
1692 | ; ret ebx = bytes written (maybe 0) |
||
1693 | ; eax = 0 ok write or other = errormsg |
||
1694 | ; |
||
1695 | ;-------------------------------------------------------------- |
||
1696 | ntfs_HdWrite: |
||
1697 | xor ebx, ebx |
||
1698 | mov eax, ERROR_UNSUPPORTED_FS |
||
1699 | ret |
||
1700 | |||
1701 | ;---------------------------------------------------------------- |
||
1702 | ; |
||
1703 | ; ntfs_HdSetFileEnd - set end of file on NTFS hard disk |
||
1704 | ; |
||
1705 | ; esi points to filename |
||
1706 | ; ebx points to 64-bit number = new file size |
||
1707 | ; ecx ignored (reserved) |
||
1708 | ; edx ignored (reserved) |
||
1709 | ; |
||
1710 | ; ret eax = 0 ok or other = errormsg |
||
1711 | ; |
||
1712 | ;-------------------------------------------------------------- |
||
1713 | ntfs_HdSetFileEnd: |
||
1714 | ntfs_HdSetFileInfo: |
||
1715 | ;---------------------------------------------------------------- |
||
1716 | ; |
||
1717 | ; ntfs_HdDelete - delete file or empty folder from NTFS hard disk |
||
1718 | ; |
||
1719 | ; esi points to filename |
||
1720 | ; |
||
1721 | ; ret eax = 0 ok or other = errormsg |
||
1722 | ; |
||
1723 | ;-------------------------------------------------------------- |
||
1724 | ntfs_HdDelete: |
||
1725 | mov eax, ERROR_UNSUPPORTED_FS |
||
1726 | ret |
||
1727 | |||
1728 | ntfs_HdGetFileInfo: |
||
262 | diamond | 1729 | cmp byte [esi], 0 |
1730 | jnz @f |
||
1731 | push 2 |
||
1732 | pop eax |
||
256 | diamond | 1733 | ret |
262 | diamond | 1734 | @@: |
1735 | call ntfs_find_lfn |
||
1736 | jnc .doit |
||
1737 | push ERROR_FILE_NOT_FOUND |
||
1738 | pop eax |
||
1739 | cmp [hd_error], 0 |
||
1740 | jz @f |
||
1741 | mov al, 11 |
||
1742 | @@: |
||
1743 | ret |
||
1744 | .doit: |
||
1745 | push esi edi |
||
1746 | mov esi, eax |
||
1747 | mov edi, edx |
||
1748 | xor eax, eax |
||
1749 | call ntfs_direntry_to_bdfe |
||
1750 | pop edi esi |
||
1751 | xor eax, eax |
||
1752 | ret>=>=>=> |