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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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287 | |||
288 | ntfs_attrlist_buf rb 0x400 |
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289 | ntfs_bitmap_buf rb 0x400 |
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290 | |||
291 | ntfs_attr_iRecord dd ? |
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292 | ntfs_attr_iBaseRecord dd ? |
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293 | ntfs_attr_offs dd ? |
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294 | ntfs_attr_list dd ? |
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257 | diamond | 295 | ntfs_attr_size dq ? |
256 | diamond | 296 | endg |
297 | |||
298 | ntfs_read_attr: |
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299 | ; in: global variables |
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300 | ; out: [ntfs_cur_read] |
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301 | pushad |
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302 | and [ntfs_cur_read], 0 |
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303 | cmp [ntfs_cur_iRecord], 0 |
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304 | jnz .nomft |
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305 | cmp [ntfs_cur_attr], 0x80 |
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306 | jnz .nomft |
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307 | mov eax, [ntfs_data.mft_retrieval_end] |
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308 | inc eax |
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309 | mul [ntfs_data.sectors_per_cluster] |
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310 | cmp eax, [ntfs_cur_offs] |
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311 | jbe .nomft |
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312 | ; precalculated part of $Mft $DATA |
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313 | mov esi, [ntfs_data.mft_retrieval] |
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314 | mov eax, [ntfs_cur_offs] |
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315 | xor edx, edx |
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316 | div [ntfs_data.sectors_per_cluster] |
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317 | ; eax = VCN, edx = offset in sectors from beginning of cluster |
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318 | xor ecx, ecx ; ecx will contain LCN |
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319 | .mftscan: |
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320 | add ecx, [esi+4] |
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321 | sub eax, [esi] |
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322 | jb @f |
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323 | add esi, 8 |
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324 | push eax |
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325 | mov eax, [ntfs_data.mft_retrieval_end] |
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326 | shl eax, 3 |
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327 | add eax, [ntfs_data.mft_retrieval] |
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328 | cmp eax, esi |
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329 | pop eax |
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330 | jnz .mftscan |
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331 | jmp .nomft |
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332 | @@: |
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333 | push ecx |
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334 | add ecx, eax |
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335 | add ecx, [esi] |
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336 | push eax |
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337 | push edx |
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338 | mov eax, [ntfs_data.sectors_per_cluster] |
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339 | mul ecx |
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340 | ; eax = sector on partition |
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341 | add eax, [PARTITION_START] |
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342 | pop edx |
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343 | add eax, edx |
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344 | mov ebx, [ntfs_cur_buf] |
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345 | pop ecx |
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346 | neg ecx |
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347 | imul ecx, [ntfs_data.sectors_per_cluster] |
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348 | sub ecx, edx |
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349 | cmp ecx, [ntfs_cur_size] |
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350 | jb @f |
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351 | mov ecx, [ntfs_cur_size] |
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352 | @@: |
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353 | ; ecx = number of sequential sectors to read |
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354 | call hd_read |
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355 | cmp [hd_error], 0 |
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356 | jnz .errread |
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357 | add [ntfs_cur_read], 0x200 |
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358 | dec [ntfs_cur_size] |
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359 | inc [ntfs_cur_offs] |
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360 | add ebx, 0x200 |
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361 | mov [ntfs_cur_buf], ebx |
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362 | inc eax |
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363 | loop @b |
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364 | pop ecx |
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365 | xor eax, eax |
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366 | xor edx, edx |
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367 | cmp [ntfs_cur_size], eax |
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368 | jz @f |
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369 | add esi, 8 |
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370 | push eax |
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371 | mov eax, [ntfs_data.mft_retrieval_end] |
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372 | shl eax, 3 |
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373 | add eax, [ntfs_data.mft_retrieval] |
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374 | cmp eax, esi |
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375 | pop eax |
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376 | jz .nomft |
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377 | jmp .mftscan |
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378 | @@: |
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379 | popad |
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380 | ret |
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381 | .errread: |
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382 | pop ecx |
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383 | .errret: |
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384 | stc |
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385 | popad |
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386 | ret |
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387 | .nomft: |
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388 | ; 1. Read file record. |
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389 | ; N.B. This will do recursive call of read_attr for $MFT::$Data. |
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390 | mov eax, [ntfs_cur_iRecord] |
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391 | mov [ntfs_attr_iRecord], eax |
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392 | and [ntfs_attr_list], 0 |
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257 | diamond | 393 | or dword [ntfs_attr_size], -1 |
394 | or dword [ntfs_attr_size+4], -1 |
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256 | diamond | 395 | or [ntfs_attr_iBaseRecord], -1 |
396 | call ntfs_read_file_record |
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397 | test eax, eax |
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398 | jz .errret |
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399 | ; 2. Find required attribute. |
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400 | mov eax, [ntfs_data.frs_buffer] |
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401 | ; a) For auxiliary records, read base record |
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402 | ; N.B. If base record is present, |
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403 | ; base iRecord may be 0 (for $Mft), but SequenceNumber is nonzero |
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404 | cmp dword [eax+24h], 0 |
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405 | jz @f |
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406 | mov eax, [eax+20h] |
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407 | ; test eax, eax |
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408 | ; jz @f |
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409 | .beginfindattr: |
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410 | mov [ntfs_attr_iRecord], eax |
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411 | call ntfs_read_file_record |
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412 | test eax, eax |
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413 | jz .errret |
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414 | @@: |
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415 | ; b) Scan for required attribute and for $ATTR_LIST |
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416 | mov eax, [ntfs_data.frs_buffer] |
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417 | movzx ecx, word [eax+14h] |
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418 | add eax, ecx |
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419 | mov ecx, [ntfs_cur_attr] |
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420 | and [ntfs_attr_offs], 0 |
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421 | .scanattr: |
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422 | cmp dword [eax], -1 |
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423 | jz .scandone |
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424 | cmp dword [eax], ecx |
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425 | jz .okattr |
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426 | cmp [ntfs_attr_iBaseRecord], -1 |
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427 | jnz .scancont |
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428 | cmp dword [eax], 0x20 ; $ATTR_LIST |
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429 | jnz .scancont |
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430 | mov [ntfs_attr_list], eax |
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431 | jmp .scancont |
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432 | .okattr: |
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433 | mov [ntfs_attr_offs], eax |
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434 | .scancont: |
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435 | add eax, [eax+4] |
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436 | jmp .scanattr |
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437 | .scandone: |
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438 | ; c) Check for required offset and length |
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439 | mov ecx, [ntfs_attr_offs] |
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440 | jecxz .noattr |
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441 | call .doreadattr |
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442 | jc @f |
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443 | cmp [ntfs_cur_size], 0 |
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444 | jnz .not_in_cur |
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445 | @@: |
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446 | popad |
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447 | ret |
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448 | .noattr: |
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449 | .not_in_cur: |
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450 | cmp [ntfs_cur_attr], 0x20 |
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451 | jz @f |
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452 | mov ecx, [ntfs_attr_list] |
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453 | test ecx, ecx |
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454 | jnz .lookattr |
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455 | .ret_is_attr: |
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456 | cmp [ntfs_attr_offs], 1 ; CF set <=> ntfs_attr_offs == 0 |
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457 | popad |
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458 | ret |
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459 | .lookattr: |
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460 | ; required attribute or required offset was not found in base record; |
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461 | ; it may be present in auxiliary records; |
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462 | ; scan $ATTR_LIST |
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463 | mov eax, [ntfs_attr_iBaseRecord] |
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464 | cmp eax, -1 |
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465 | jz @f |
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466 | call ntfs_read_file_record |
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467 | test eax, eax |
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468 | jz .errret |
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469 | or [ntfs_attr_iBaseRecord], -1 |
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470 | @@: |
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471 | push [ntfs_cur_offs] |
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472 | push [ntfs_cur_size] |
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473 | push [ntfs_cur_read] |
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474 | push [ntfs_cur_buf] |
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257 | diamond | 475 | push dword [ntfs_attr_size] |
476 | push dword [ntfs_attr_size+4] |
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477 | or dword [ntfs_attr_size], -1 |
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478 | or dword [ntfs_attr_size+4], -1 |
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256 | diamond | 479 | xor edx, edx |
480 | mov [ntfs_cur_offs], edx |
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481 | mov [ntfs_cur_size], 2 |
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482 | and [ntfs_cur_read], 0 |
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483 | mov [ntfs_cur_buf], ntfs_attrlist_buf |
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484 | push edx |
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485 | call .doreadattr |
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486 | pop edx |
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257 | diamond | 487 | pop dword [ntfs_attr_size+4] |
488 | pop dword [ntfs_attr_size] |
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256 | diamond | 489 | mov ebp, [ntfs_cur_read] |
490 | pop [ntfs_cur_buf] |
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491 | pop [ntfs_cur_read] |
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492 | pop [ntfs_cur_size] |
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493 | pop [ntfs_cur_offs] |
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494 | jc .errret |
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495 | mov esi, ntfs_attrlist_buf |
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496 | or edi, -1 |
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497 | .scanliststart: |
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498 | lea ebp, [ebp+esi-1Ah] |
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499 | mov eax, [ntfs_cur_attr] |
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500 | .scanlist: |
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501 | cmp esi, ebp |
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502 | jae .scanlistdone |
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503 | cmp eax, [esi] |
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504 | jz @f |
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505 | .scanlistcont: |
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506 | movzx ecx, word [esi+4] |
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507 | add esi, ecx |
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508 | jmp .scanlist |
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509 | @@: |
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510 | push eax |
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511 | mov eax, [esi+8] |
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257 | diamond | 512 | test eax, eax |
513 | jnz .testf |
||
514 | mov eax, dword [ntfs_attr_size] |
||
515 | and eax, dword [ntfs_attr_size+4] |
||
516 | cmp eax, -1 |
||
517 | jnz .testfz |
||
518 | ; if attribute is in auxiliary records, its size is defined only in first |
||
519 | mov eax, [esi+10h] |
||
520 | call ntfs_read_file_record |
||
521 | test eax, eax |
||
522 | jnz @f |
||
523 | .errret_pop: |
||
524 | pop eax |
||
525 | jmp .errret |
||
526 | @@: |
||
527 | mov eax, [ntfs_data.frs_buffer] |
||
528 | movzx ecx, word [eax+14h] |
||
529 | add eax, ecx |
||
530 | mov ecx, [ntfs_cur_attr] |
||
531 | @@: |
||
532 | cmp dword [eax], -1 |
||
533 | jz .errret_pop |
||
534 | cmp dword [eax], ecx |
||
535 | jz @f |
||
536 | add eax, [eax+4] |
||
537 | jmp @b |
||
538 | @@: |
||
539 | cmp byte [eax+8], 0 |
||
540 | jnz .sdnores |
||
541 | mov eax, [eax+10h] |
||
542 | mov dword [ntfs_attr_size], eax |
||
543 | and dword [ntfs_attr_size+4], 0 |
||
544 | jmp .testfz |
||
545 | .sdnores: |
||
546 | mov ecx, [eax+30h] |
||
547 | mov dword [ntfs_attr_size], ecx |
||
548 | mov ecx, [eax+34h] |
||
549 | mov dword [ntfs_attr_size+4], ecx |
||
550 | .testfz: |
||
551 | xor eax, eax |
||
552 | .testf: |
||
256 | diamond | 553 | imul eax, [ntfs_data.sectors_per_cluster] |
554 | cmp eax, [ntfs_cur_offs] |
||
555 | pop eax |
||
556 | ja @f |
||
557 | mov edi, [esi+10h] ; keep previous iRecord |
||
558 | jmp .scanlistcont |
||
559 | @@: |
||
257 | diamond | 560 | .scanlistfound: |
256 | diamond | 561 | cmp edi, -1 |
562 | jnz @f |
||
563 | popad |
||
564 | ret |
||
565 | @@: |
||
566 | mov eax, [ntfs_cur_iRecord] |
||
567 | mov [ntfs_attr_iBaseRecord], eax |
||
568 | mov eax, edi |
||
569 | jmp .beginfindattr |
||
257 | diamond | 570 | .sde: |
571 | popad |
||
572 | stc |
||
573 | ret |
||
256 | diamond | 574 | .scanlistdone: |
575 | sub ebp, ntfs_attrlist_buf-1Ah |
||
576 | test ebp, 1FFh |
||
257 | diamond | 577 | jnz .scanlistfound |
256 | diamond | 578 | test edx, edx |
579 | jnz @f |
||
580 | inc edx |
||
581 | cmp ebp, 0x400 |
||
257 | diamond | 582 | jnz .scanlistfound |
256 | diamond | 583 | @@: |
584 | inc edx |
||
585 | push esi edi |
||
586 | mov esi, ntfs_attrlist_buf+0x200 |
||
587 | mov edi, ntfs_attrlist_buf |
||
588 | mov ecx, 0x200/4 |
||
589 | rep movsd |
||
590 | pop edi esi |
||
591 | sub esi, 0x200 |
||
592 | push [ntfs_cur_offs] |
||
593 | push [ntfs_cur_size] |
||
594 | push [ntfs_cur_read] |
||
595 | push [ntfs_cur_buf] |
||
596 | mov [ntfs_cur_offs], edx |
||
597 | mov [ntfs_cur_size], 1 |
||
598 | and [ntfs_cur_read], 0 |
||
599 | mov [ntfs_cur_buf], ntfs_attrlist_buf+0x200 |
||
600 | push esi edx |
||
601 | call .doreadattr |
||
602 | pop edx esi |
||
603 | mov ebp, [ntfs_cur_read] |
||
604 | pop [ntfs_cur_buf] |
||
605 | pop [ntfs_cur_read] |
||
606 | pop [ntfs_cur_size] |
||
607 | pop [ntfs_cur_offs] |
||
608 | jc .errret |
||
609 | jmp .scanliststart |
||
610 | |||
611 | .doreadattr: |
||
612 | cmp byte [ecx+8], 0 |
||
613 | jnz .nonresident |
||
614 | mov eax, [ecx+10h] ; length |
||
615 | mov esi, eax |
||
616 | mov edx, [ntfs_cur_offs] |
||
617 | shr eax, 9 |
||
618 | cmp eax, edx |
||
619 | jb .okret |
||
620 | shl edx, 9 |
||
621 | sub esi, edx |
||
622 | movzx eax, word [ecx+14h] |
||
623 | add edx, eax |
||
624 | add edx, ecx ; edx -> data |
||
625 | mov eax, [ntfs_cur_size] |
||
626 | cmp eax, (0xFFFFFFFF shr 9)+1 |
||
627 | jbe @f |
||
628 | mov eax, (0xFFFFFFFF shr 9)+1 |
||
629 | @@: |
||
630 | shl eax, 9 |
||
631 | cmp eax, esi |
||
632 | jbe @f |
||
633 | mov eax, esi |
||
634 | @@: |
||
635 | ; eax = length, edx -> data |
||
636 | mov [ntfs_cur_read], eax |
||
637 | mov ecx, eax |
||
638 | mov eax, edx |
||
639 | mov ebx, [ntfs_cur_buf] |
||
640 | call memmove |
||
257 | diamond | 641 | and [ntfs_cur_size], 0 ; CF=0 |
256 | diamond | 642 | ret |
643 | .nonresident: |
||
257 | diamond | 644 | ; Not all auxiliary records contain correct FileSize info |
645 | mov eax, dword [ntfs_attr_size] |
||
646 | mov edx, dword [ntfs_attr_size+4] |
||
647 | push eax |
||
648 | and eax, edx |
||
649 | cmp eax, -1 |
||
650 | pop eax |
||
651 | jnz @f |
||
256 | diamond | 652 | mov eax, [ecx+30h] ; FileSize |
653 | mov edx, [ecx+34h] |
||
257 | diamond | 654 | mov dword [ntfs_attr_size], eax |
655 | mov dword [ntfs_attr_size+4], edx |
||
656 | @@: |
||
256 | diamond | 657 | add eax, 0x1FF |
658 | adc edx, 0 |
||
659 | shrd eax, edx, 9 |
||
660 | sub eax, [ntfs_cur_offs] |
||
661 | ja @f |
||
662 | ; return with nothing read |
||
257 | diamond | 663 | and [ntfs_cur_size], 0 |
256 | diamond | 664 | .okret: |
665 | clc |
||
666 | ret |
||
667 | @@: |
||
668 | ; reduce read length |
||
669 | cmp [ntfs_cur_size], eax |
||
670 | jb @f |
||
671 | mov [ntfs_cur_size], eax |
||
672 | @@: |
||
673 | cmp [ntfs_cur_size], 0 |
||
674 | jz .okret |
||
675 | mov eax, [ntfs_cur_offs] |
||
676 | xor edx, edx |
||
677 | div [ntfs_data.sectors_per_cluster] |
||
678 | sub eax, [ecx+10h] ; first_vbo |
||
679 | jb .okret |
||
680 | ; eax = cluster, edx = starting sector |
||
681 | sub esp, 10h |
||
682 | movzx esi, word [ecx+20h] ; mcb_info_ofs |
||
683 | add esi, ecx |
||
684 | xor ebp, ebp |
||
685 | .readloop: |
||
686 | call ntfs_decode_mcb_entry |
||
687 | jnc .break |
||
688 | add ebp, [esp+8] |
||
689 | sub eax, [esp] |
||
690 | jae .readloop |
||
691 | push ecx |
||
692 | push eax |
||
693 | add eax, [esp+8] |
||
694 | add eax, ebp |
||
695 | imul eax, [ntfs_data.sectors_per_cluster] |
||
696 | add eax, edx |
||
697 | add eax, [PARTITION_START] |
||
698 | pop ecx |
||
699 | neg ecx |
||
700 | imul ecx, [ntfs_data.sectors_per_cluster] |
||
701 | sub ecx, edx |
||
702 | cmp ecx, [ntfs_cur_size] |
||
703 | jb @f |
||
704 | mov ecx, [ntfs_cur_size] |
||
705 | @@: |
||
706 | mov ebx, [ntfs_cur_buf] |
||
707 | @@: |
||
708 | call hd_read |
||
709 | cmp [hd_error], 0 |
||
710 | jnz .errread2 |
||
711 | add ebx, 0x200 |
||
712 | mov [ntfs_cur_buf], ebx |
||
713 | inc eax |
||
714 | add [ntfs_cur_read], 0x200 |
||
715 | dec [ntfs_cur_size] |
||
716 | inc [ntfs_cur_offs] |
||
717 | loop @b |
||
718 | pop ecx |
||
719 | cmp [ntfs_cur_size], 0 |
||
720 | jnz .readloop |
||
721 | add esp, 10h |
||
722 | jmp .okret |
||
723 | .errread2: |
||
724 | pop ecx |
||
725 | add esp, 10h |
||
726 | jmp .errret |
||
727 | .break: |
||
728 | add esp, 10h ; CF=0 |
||
729 | ret |
||
730 | |||
731 | ntfs_read_file_record: |
||
732 | ; in: eax=iRecord |
||
733 | ; out: [ntfs_data.frs_buffer] contains information |
||
734 | ; eax=0 - failed, eax=1 - success |
||
735 | ; Read attr $DATA of $Mft, starting from eax*[ntfs_data.frs_size] |
||
736 | push ecx edx |
||
737 | mov ecx, [ntfs_data.frs_size] |
||
738 | mul ecx |
||
739 | shrd eax, edx, 9 |
||
740 | shr edx, 9 |
||
741 | jnz .err |
||
257 | diamond | 742 | push [ntfs_attr_iRecord] |
743 | push [ntfs_attr_iBaseRecord] |
||
744 | push [ntfs_attr_offs] |
||
745 | push [ntfs_attr_list] |
||
746 | push dword [ntfs_attr_size+4] |
||
747 | push dword [ntfs_attr_size] |
||
256 | diamond | 748 | push [ntfs_cur_iRecord] |
749 | push [ntfs_cur_attr] |
||
750 | push [ntfs_cur_offs] |
||
751 | push [ntfs_cur_size] |
||
752 | push [ntfs_cur_buf] |
||
753 | push [ntfs_cur_read] |
||
754 | mov [ntfs_cur_attr], 0x80 ; $DATA |
||
755 | and [ntfs_cur_iRecord], 0 ; $Mft |
||
756 | mov [ntfs_cur_offs], eax |
||
757 | shr ecx, 9 |
||
758 | mov [ntfs_cur_size], ecx |
||
759 | mov eax, [ntfs_data.frs_buffer] |
||
760 | mov [ntfs_cur_buf], eax |
||
761 | call ntfs_read_attr |
||
762 | mov eax, [ntfs_cur_read] |
||
763 | pop [ntfs_cur_read] |
||
764 | pop [ntfs_cur_buf] |
||
765 | pop [ntfs_cur_size] |
||
766 | pop [ntfs_cur_offs] |
||
767 | pop [ntfs_cur_attr] |
||
768 | pop [ntfs_cur_iRecord] |
||
257 | diamond | 769 | pop dword [ntfs_attr_size] |
770 | pop dword [ntfs_attr_size+4] |
||
771 | pop [ntfs_attr_list] |
||
772 | pop [ntfs_attr_offs] |
||
773 | pop [ntfs_attr_iBaseRecord] |
||
774 | pop [ntfs_attr_iRecord] |
||
256 | diamond | 775 | pop edx ecx |
776 | jc .errret |
||
777 | cmp eax, [ntfs_data.frs_size] |
||
778 | jnz .errret |
||
779 | mov eax, [ntfs_data.frs_buffer] |
||
780 | cmp dword [eax], 'FILE' |
||
781 | jnz .errret |
||
782 | push ebx |
||
783 | mov ebx, eax |
||
784 | call ntfs_restore_usa_frs |
||
785 | pop ebx |
||
786 | setnc al |
||
787 | movzx eax, al |
||
788 | .ret: |
||
789 | ret |
||
790 | .err: |
||
791 | pop edx ecx |
||
792 | .errret: |
||
793 | xor eax, eax |
||
794 | ret |
||
795 | |||
796 | ntfs_restore_usa_frs: |
||
797 | mov eax, [ntfs_data.frs_size] |
||
798 | ntfs_restore_usa: |
||
799 | pushad |
||
800 | shr eax, 9 |
||
801 | mov ecx, eax |
||
802 | inc eax |
||
803 | cmp [ebx+6], ax |
||
804 | jnz .err |
||
805 | movzx eax, word [ebx+4] |
||
806 | lea esi, [eax+ebx] |
||
807 | lodsw |
||
808 | mov edx, eax |
||
809 | lea edi, [ebx+0x1FE] |
||
810 | @@: |
||
811 | cmp [edi], dx |
||
812 | jnz .err |
||
813 | lodsw |
||
814 | stosw |
||
815 | add edi, 0x1FE |
||
816 | loop @b |
||
817 | popad |
||
818 | clc |
||
819 | ret |
||
820 | .err: |
||
821 | popad |
||
822 | stc |
||
823 | ret |
||
824 | |||
825 | ntfs_decode_mcb_entry: |
||
826 | push eax ecx edi |
||
827 | lea edi, [esp+16] |
||
828 | xor eax, eax |
||
829 | lodsb |
||
830 | test al, al |
||
831 | jz .end |
||
832 | mov ecx, eax |
||
833 | and ecx, 0xF |
||
834 | cmp ecx, 8 |
||
835 | ja .end |
||
836 | push ecx |
||
837 | rep movsb |
||
838 | pop ecx |
||
839 | sub ecx, 8 |
||
840 | neg ecx |
||
841 | cmp byte [esi-1], 80h |
||
842 | jae .end |
||
843 | push eax |
||
844 | xor eax, eax |
||
845 | rep stosb |
||
846 | pop ecx |
||
847 | shr ecx, 4 |
||
848 | cmp ecx, 8 |
||
849 | ja .end |
||
850 | push ecx |
||
851 | rep movsb |
||
852 | pop ecx |
||
853 | sub ecx, 8 |
||
854 | neg ecx |
||
855 | cmp byte [esi-1], 80h |
||
257 | diamond | 856 | cmc |
256 | diamond | 857 | sbb eax, eax |
858 | rep stosb |
||
859 | stc |
||
860 | .end: |
||
861 | pop edi ecx eax |
||
862 | ret |
||
863 | |||
257 | diamond | 864 | ntfs_find_lfn: |
865 | ; in: esi->name |
||
866 | ; out: CF=1 - file not found |
||
867 | ; else CF=0 and eax=ntfs_cur_iRecord valid |
||
868 | mov [ntfs_cur_iRecord], 5 ; start parse from root cluster |
||
869 | .doit2: |
||
870 | mov [ntfs_cur_attr], 0x90 ; $INDEX_ROOT |
||
871 | and [ntfs_cur_offs], 0 |
||
872 | mov eax, [ntfs_data.cur_index_size] |
||
873 | mov [ntfs_cur_size], eax |
||
874 | mov eax, [ntfs_data.cur_index_buf] |
||
875 | mov [ntfs_cur_buf], eax |
||
876 | call ntfs_read_attr |
||
877 | jnc @f |
||
878 | .ret: |
||
879 | ret |
||
880 | @@: |
||
881 | cmp [ntfs_cur_read], 0x20 |
||
882 | jc .ret |
||
883 | pushad |
||
884 | mov esi, [ntfs_data.cur_index_buf] |
||
885 | mov eax, [esi+14h] |
||
886 | add eax, 10h |
||
887 | cmp [ntfs_cur_read], eax |
||
888 | jae .readok1 |
||
889 | add eax, 1FFh |
||
890 | shr eax, 9 |
||
891 | cmp eax, [ntfs_data.cur_index_size] |
||
892 | ja @f |
||
893 | .stc_ret: |
||
894 | popad |
||
895 | stc |
||
896 | ret |
||
897 | @@: |
||
898 | ; reallocate |
||
899 | push eax |
||
900 | push [ntfs_data.cur_index_buf] |
||
901 | call kernel_free |
||
902 | pop eax |
||
903 | mov [ntfs_data.cur_index_size], eax |
||
904 | push eax |
||
905 | call kernel_alloc |
||
906 | test eax, eax |
||
907 | jnz @f |
||
908 | and [ntfs_data.cur_index_size], 0 |
||
909 | and [ntfs_data.cur_index_buf], 0 |
||
910 | jmp .stc_ret |
||
911 | @@: |
||
912 | mov [ntfs_data.cur_index_buf], eax |
||
913 | popad |
||
914 | jmp .doit2 |
||
915 | .readok1: |
||
916 | mov ebp, [esi+8] ; subnode_size |
||
917 | shr ebp, 9 |
||
918 | cmp ebp, [ntfs_data.cur_index_size] |
||
919 | jbe .ok2 |
||
920 | push esi ebp |
||
921 | push ebp |
||
922 | call kernel_alloc |
||
923 | pop ebp esi |
||
924 | test eax, eax |
||
925 | jz .stc_ret |
||
926 | mov edi, eax |
||
927 | mov ecx, [ntfs_data.cur_index_size] |
||
928 | shl ecx, 9-2 |
||
929 | rep movsd |
||
930 | mov esi, eax |
||
931 | mov [ntfs_data.cur_index_size], ebp |
||
932 | push esi ebp |
||
933 | push [ntfs_data.cur_index_buf] |
||
934 | call kernel_free |
||
935 | pop ebp esi |
||
936 | mov [ntfs_data.cur_index_buf], esi |
||
937 | .ok2: |
||
938 | add esi, 10h |
||
939 | mov edi, [esp+4] |
||
940 | ; edi -> name, esi -> current index data, ebp = subnode size |
||
941 | .scanloop: |
||
942 | add esi, [esi] |
||
943 | .scanloopint: |
||
944 | test byte [esi+0Ch], 2 |
||
945 | jnz .subnode |
||
946 | push esi |
||
947 | add esi, 0x52 |
||
948 | movzx ecx, byte [esi-2] |
||
949 | push edi |
||
950 | @@: |
||
951 | lodsw |
||
952 | call uni2ansi_char |
||
953 | call char_toupper |
||
954 | push eax |
||
955 | mov al, [edi] |
||
956 | inc edi |
||
957 | call char_toupper |
||
958 | cmp al, [esp] |
||
959 | pop eax |
||
960 | loopz @b |
||
961 | jz .found |
||
962 | pop edi |
||
963 | pop esi |
||
964 | jb .subnode |
||
965 | .scanloopcont: |
||
966 | movzx eax, word [esi+8] |
||
967 | add esi, eax |
||
968 | jmp .scanloopint |
||
969 | .subnode: |
||
970 | test byte [esi+0Ch], 1 |
||
971 | jz .notfound |
||
972 | movzx eax, word [esi+8] |
||
973 | mov eax, [esi+eax-8] |
||
974 | mul [ntfs_data.sectors_per_cluster] |
||
975 | mov [ntfs_cur_offs], eax |
||
976 | mov [ntfs_cur_attr], 0xA0 ; $INDEX_ALLOCATION |
||
977 | mov [ntfs_cur_size], ebp |
||
978 | mov eax, [ntfs_data.cur_index_buf] |
||
979 | mov esi, eax |
||
980 | mov [ntfs_cur_buf], eax |
||
981 | call ntfs_read_attr |
||
982 | mov eax, ebp |
||
983 | shl eax, 9 |
||
984 | cmp [ntfs_cur_read], eax |
||
985 | jnz .notfound |
||
986 | cmp dword [esi], 'INDX' |
||
987 | jnz .notfound |
||
988 | mov ebx, esi |
||
989 | call ntfs_restore_usa |
||
990 | jc .notfound |
||
991 | add esi, 0x18 |
||
992 | jmp .scanloop |
||
993 | .notfound: |
||
994 | popad |
||
995 | stc |
||
996 | ret |
||
997 | .found: |
||
998 | cmp byte [edi], 0 |
||
999 | jz .done |
||
1000 | cmp byte [edi], '/' |
||
1001 | jz .next |
||
1002 | pop edi |
||
1003 | pop esi |
||
1004 | jmp .scanloopcont |
||
1005 | .done: |
||
1006 | .next: |
||
1007 | pop esi |
||
1008 | pop esi |
||
1009 | mov eax, [esi] |
||
1010 | mov [ntfs_cur_iRecord], eax |
||
1011 | mov [esp+1Ch], eax |
||
1012 | mov [esp+4], edi |
||
1013 | popad |
||
1014 | inc esi |
||
1015 | cmp byte [esi-1], 0 |
||
1016 | jnz .doit2 |
||
1017 | ret |
||
1018 | |||
256 | diamond | 1019 | ;---------------------------------------------------------------- |
1020 | ; |
||
1021 | ; ntfs_HdRead - read NTFS hard disk |
||
1022 | ; |
||
1023 | ; esi points to filename |
||
1024 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1025 | ; may be ebx=0 - start from first byte |
||
1026 | ; ecx number of bytes to read, 0+ |
||
1027 | ; edx mem location to return data |
||
1028 | ; |
||
1029 | ; ret ebx = bytes read or 0xffffffff file not found |
||
1030 | ; eax = 0 ok read or other = errormsg |
||
1031 | ; |
||
1032 | ;-------------------------------------------------------------- |
||
1033 | ntfs_HdRead: |
||
1034 | or ebx, -1 |
||
1035 | mov eax, ERROR_UNSUPPORTED_FS |
||
1036 | ret |
||
1037 | |||
1038 | ;---------------------------------------------------------------- |
||
1039 | ; |
||
1040 | ; ntfs_HdReadFolder - read NTFS hard disk folder |
||
1041 | ; |
||
1042 | ; esi points to filename |
||
1043 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
||
1044 | ; & flags (bitfields) |
||
1045 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
1046 | ; ecx number of blocks to read, 0+ |
||
1047 | ; edx mem location to return data |
||
1048 | ; |
||
1049 | ; ret ebx = blocks read or 0xffffffff folder not found |
||
1050 | ; eax = 0 ok read or other = errormsg |
||
1051 | ; |
||
1052 | ;-------------------------------------------------------------- |
||
1053 | ntfs_HdReadFolder: |
||
1054 | mov eax, 5 ; root cluster |
||
1055 | cmp byte [esi], 0 |
||
1056 | jz .doit |
||
257 | diamond | 1057 | call ntfs_find_lfn |
1058 | jnc .doit2 |
||
256 | diamond | 1059 | .notfound: |
1060 | or ebx, -1 |
||
1061 | push ERROR_FILE_NOT_FOUND |
||
1062 | .pop_ret: |
||
1063 | pop eax |
||
1064 | ret |
||
1065 | .doit: |
||
1066 | mov [ntfs_cur_iRecord], eax |
||
1067 | .doit2: |
||
257 | diamond | 1068 | mov [ntfs_cur_attr], 0x10 ; $STANDARD_INFORMATION |
1069 | and [ntfs_cur_offs], 0 |
||
1070 | mov [ntfs_cur_size], 1 |
||
1071 | mov [ntfs_cur_buf], ntfs_bitmap_buf |
||
1072 | call ntfs_read_attr |
||
1073 | jc .notfound |
||
256 | diamond | 1074 | mov [ntfs_cur_attr], 0x90 ; $INDEX_ROOT |
1075 | and [ntfs_cur_offs], 0 |
||
1076 | mov eax, [ntfs_data.cur_index_size] |
||
1077 | mov [ntfs_cur_size], eax |
||
1078 | mov eax, [ntfs_data.cur_index_buf] |
||
1079 | mov [ntfs_cur_buf], eax |
||
1080 | call ntfs_read_attr |
||
1081 | jnc .ok |
||
1082 | cmp [hd_error], 0 |
||
1083 | jz .notfound |
||
1084 | or ebx, -1 |
||
1085 | push 11 |
||
1086 | jmp .pop_ret |
||
1087 | .ok: |
||
1088 | cmp [ntfs_cur_read], 0x20 |
||
1089 | jae @f |
||
1090 | or ebx, -1 |
||
1091 | .fserr: |
||
1092 | push ERROR_FAT_TABLE |
||
1093 | jmp .pop_ret |
||
1094 | @@: |
||
1095 | pushad |
||
1096 | mov esi, [ntfs_data.cur_index_buf] |
||
1097 | mov eax, [esi+14h] |
||
1098 | add eax, 10h |
||
1099 | cmp [ntfs_cur_read], eax |
||
1100 | jae .readok1 |
||
1101 | add eax, 1FFh |
||
1102 | shr eax, 9 |
||
1103 | cmp eax, [ntfs_data.cur_index_size] |
||
1104 | ja @f |
||
1105 | popad |
||
1106 | jmp .fserr |
||
1107 | @@: |
||
1108 | ; reallocate |
||
1109 | push eax |
||
1110 | push [ntfs_data.cur_index_buf] |
||
1111 | call kernel_free |
||
1112 | pop eax |
||
1113 | mov [ntfs_data.cur_index_size], eax |
||
1114 | push eax |
||
1115 | call kernel_alloc |
||
1116 | test eax, eax |
||
1117 | jnz @f |
||
1118 | and [ntfs_data.cur_index_size], 0 |
||
1119 | and [ntfs_data.cur_index_buf], 0 |
||
1120 | .nomem: |
||
1121 | popad |
||
1122 | or ebx, -1 |
||
1123 | push 12 |
||
1124 | pop eax |
||
1125 | ret |
||
1126 | @@: |
||
1127 | mov [ntfs_data.cur_index_buf], eax |
||
1128 | popad |
||
1129 | jmp .doit2 |
||
1130 | .readok1: |
||
1131 | mov ebp, [esi+8] ; subnode_size |
||
1132 | shr ebp, 9 |
||
1133 | cmp ebp, [ntfs_data.cur_index_size] |
||
1134 | jbe .ok2 |
||
1135 | push esi ebp |
||
1136 | push ebp |
||
1137 | call kernel_alloc |
||
1138 | pop ebp esi |
||
1139 | test eax, eax |
||
1140 | jz .nomem |
||
1141 | mov edi, eax |
||
1142 | mov ecx, [ntfs_data.cur_index_size] |
||
1143 | shl ecx, 9-2 |
||
1144 | rep movsd |
||
1145 | mov esi, eax |
||
1146 | mov [ntfs_data.cur_index_size], ebp |
||
1147 | push esi ebp |
||
1148 | push [ntfs_data.cur_index_buf] |
||
1149 | call kernel_free |
||
1150 | pop ebp esi |
||
1151 | mov [ntfs_data.cur_index_buf], esi |
||
1152 | .ok2: |
||
1153 | add esi, 10h |
||
1154 | mov ebx, [esp+10h] |
||
1155 | mov edx, [esp+14h] |
||
1156 | push dword [ebx+4] ; read ANSI/UNICODE name |
||
1157 | mov ebx, [ebx] |
||
1158 | ; init header |
||
1159 | mov edi, edx |
||
1160 | mov ecx, 32/4 |
||
1161 | xor eax, eax |
||
1162 | rep stosd |
||
1163 | mov byte [edx], 1 ; version |
||
1164 | mov ecx, [esp+4+18h] |
||
1165 | push edx |
||
1166 | mov edx, esp |
||
1167 | ; edi -> BDFE, esi -> current index data, ebp = subnode size, ebx = first wanted block, |
||
1168 | ; ecx = number of blocks to read |
||
1169 | ; edx -> parameters block: dd |
||
257 | diamond | 1170 | cmp [ntfs_cur_iRecord], 5 |
1171 | jz .skip_specials |
||
1172 | ; dot and dotdot entries |
||
1173 | push esi |
||
1174 | xor esi, esi |
||
1175 | call .add_special_entry |
||
1176 | inc esi |
||
1177 | call .add_special_entry |
||
1178 | pop esi |
||
1179 | .skip_specials: |
||
256 | diamond | 1180 | ; at first, dump index root |
1181 | add esi, [esi] |
||
1182 | .dump_root: |
||
1183 | test byte [esi+0Ch], 2 |
||
1184 | jnz .dump_root_done |
||
1185 | call .add_entry |
||
1186 | movzx eax, word [esi+8] |
||
1187 | add esi, eax |
||
1188 | jmp .dump_root |
||
1189 | .dump_root_done: |
||
1190 | ; now dump all subnodes |
||
1191 | push ecx edi |
||
1192 | mov edi, ntfs_bitmap_buf |
||
1193 | mov [ntfs_cur_buf], edi |
||
1194 | mov ecx, 0x400/4 |
||
1195 | xor eax, eax |
||
1196 | rep stosd |
||
1197 | mov [ntfs_cur_attr], 0xB0 ; $BITMAP |
||
1198 | and [ntfs_cur_offs], 0 |
||
1199 | mov [ntfs_cur_size], 2 |
||
1200 | call ntfs_read_attr |
||
1201 | pop edi ecx |
||
1202 | push 0 ; save offset in $BITMAP attribute |
||
1203 | and [ntfs_cur_offs], 0 |
||
1204 | .dumploop: |
||
1205 | mov [ntfs_cur_attr], 0xA0 |
||
1206 | mov [ntfs_cur_size], ebp |
||
1207 | mov eax, [ntfs_data.cur_index_buf] |
||
1208 | mov esi, eax |
||
1209 | mov [ntfs_cur_buf], eax |
||
1210 | push [ntfs_cur_offs] |
||
257 | diamond | 1211 | mov eax, [ntfs_cur_offs] |
1212 | imul eax, ebp |
||
1213 | mov [ntfs_cur_offs], eax |
||
256 | diamond | 1214 | call ntfs_read_attr |
1215 | pop [ntfs_cur_offs] |
||
1216 | mov eax, ebp |
||
1217 | shl eax, 9 |
||
1218 | cmp [ntfs_cur_read], eax |
||
1219 | jnz .done |
||
1220 | push eax |
||
1221 | mov eax, [ntfs_cur_offs] |
||
1222 | and eax, 0x400*8-1 |
||
1223 | bt dword [ntfs_bitmap_buf], eax |
||
1224 | pop eax |
||
1225 | jnc .dump_subnode_done |
||
1226 | cmp dword [esi], 'INDX' |
||
1227 | jnz .dump_subnode_done |
||
1228 | push ebx |
||
1229 | mov ebx, esi |
||
1230 | call ntfs_restore_usa |
||
1231 | pop ebx |
||
1232 | jc .dump_subnode_done |
||
1233 | add esi, 0x18 |
||
1234 | add esi, [esi] |
||
1235 | .dump_subnode: |
||
1236 | test byte [esi+0Ch], 2 |
||
1237 | jnz .dump_subnode_done |
||
1238 | call .add_entry |
||
1239 | movzx eax, word [esi+8] |
||
1240 | add esi, eax |
||
1241 | jmp .dump_subnode |
||
1242 | .dump_subnode_done: |
||
1243 | inc [ntfs_cur_offs] |
||
1244 | test [ntfs_cur_offs], 0x400*8-1 |
||
1245 | jnz .dumploop |
||
1246 | mov [ntfs_cur_attr], 0xB0 |
||
1247 | push ecx edi |
||
1248 | mov edi, ntfs_bitmap_buf |
||
1249 | mov [ntfs_cur_buf], edi |
||
1250 | mov ecx, 0x400/4 |
||
1251 | xor eax, eax |
||
1252 | rep stosd |
||
1253 | pop edi ecx |
||
1254 | pop eax |
||
1255 | push [ntfs_cur_offs] |
||
1256 | inc eax |
||
1257 | mov [ntfs_cur_offs], eax |
||
1258 | mov [ntfs_cur_size], 2 |
||
1259 | push eax |
||
1260 | call ntfs_read_attr |
||
1261 | pop eax |
||
1262 | pop [ntfs_cur_offs] |
||
1263 | push eax |
||
1264 | jmp .dumploop |
||
1265 | .done: |
||
1266 | pop eax |
||
1267 | pop edx |
||
1268 | mov ebx, [edx+4] |
||
1269 | pop edx |
||
1270 | xor eax, eax |
||
1271 | dec ecx |
||
1272 | js @f |
||
1273 | mov al, ERROR_END_OF_FILE |
||
1274 | @@: |
||
1275 | mov [esp+1Ch], eax |
||
1276 | mov [esp+10h], ebx |
||
1277 | popad |
||
1278 | ret |
||
1279 | |||
257 | diamond | 1280 | .add_special_entry: |
1281 | mov eax, [edx] |
||
1282 | inc dword [eax+8] ; new file found |
||
1283 | dec ebx |
||
1284 | jns .ret |
||
1285 | dec ecx |
||
1286 | js .ret |
||
1287 | inc dword [eax+4] ; new file block copied |
||
1288 | mov eax, [edx+4] |
||
1289 | mov [edi+4], eax |
||
1290 | ; mov eax, dword [ntfs_bitmap_buf+0x20] |
||
1291 | ; or al, 0x10 |
||
1292 | mov eax, 0x10 |
||
1293 | stosd |
||
1294 | scasd |
||
1295 | push edx |
||
1296 | mov eax, dword [ntfs_bitmap_buf] |
||
1297 | mov edx, dword [ntfs_bitmap_buf+4] |
||
1298 | call ntfs_datetime_to_bdfe |
||
1299 | mov eax, dword [ntfs_bitmap_buf+0x18] |
||
1300 | mov edx, dword [ntfs_bitmap_buf+0x1C] |
||
1301 | call ntfs_datetime_to_bdfe |
||
1302 | mov eax, dword [ntfs_bitmap_buf+8] |
||
1303 | mov edx, dword [ntfs_bitmap_buf+0xC] |
||
1304 | call ntfs_datetime_to_bdfe |
||
1305 | pop edx |
||
1306 | xor eax, eax |
||
1307 | stosd |
||
1308 | stosd |
||
1309 | mov al, '.' |
||
1310 | push edi ecx |
||
1311 | lea ecx, [esi+1] |
||
1312 | test byte [edi-0x24], 1 |
||
1313 | jz @f |
||
1314 | rep stosw |
||
1315 | pop ecx |
||
1316 | xor eax, eax |
||
1317 | stosw |
||
1318 | pop edi |
||
1319 | add edi, 520 |
||
1320 | ret |
||
1321 | @@: |
||
1322 | rep stosb |
||
1323 | pop ecx |
||
1324 | xor eax, eax |
||
1325 | stosb |
||
1326 | pop edi |
||
1327 | add edi, 264 |
||
1328 | .ret: |
||
1329 | ret |
||
1330 | |||
256 | diamond | 1331 | .add_entry: |
1332 | ; do not return DOS 8.3 names |
||
1333 | cmp byte [esi+0x51], 2 |
||
1334 | jz .ret |
||
1335 | ; do not return system files |
||
1336 | ; ... note that there will be no bad effects if system files also were reported ... |
||
1337 | cmp dword [esi], 0x10 |
||
1338 | jb .ret |
||
1339 | mov eax, [edx] |
||
1340 | inc dword [eax+8] ; new file found |
||
1341 | dec ebx |
||
1342 | jns .ret |
||
1343 | dec ecx |
||
1344 | js .ret |
||
1345 | inc dword [eax+4] ; new file block copied |
||
1346 | mov eax, [edx+4] ; flags |
||
1347 | |||
1348 | ntfs_direntry_to_bdfe: |
||
1349 | mov [edi+4], eax ; ANSI/UNICODE name |
||
1350 | mov eax, [esi+48h] |
||
1351 | test eax, 0x10000000 |
||
1352 | jz @f |
||
1353 | and eax, not 0x10000000 |
||
1354 | or al, 0x10 |
||
1355 | @@: |
||
1356 | stosd |
||
1357 | scasd |
||
1358 | push edx |
||
1359 | mov eax, [esi+0x18] |
||
1360 | mov edx, [esi+0x1C] |
||
1361 | call ntfs_datetime_to_bdfe |
||
1362 | mov eax, [esi+0x30] |
||
1363 | mov edx, [esi+0x34] |
||
1364 | call ntfs_datetime_to_bdfe |
||
1365 | mov eax, [esi+0x20] |
||
1366 | mov edx, [esi+0x24] |
||
1367 | call ntfs_datetime_to_bdfe |
||
1368 | pop edx |
||
1369 | mov eax, [esi+0x40] |
||
1370 | stosd |
||
1371 | mov eax, [esi+0x44] |
||
1372 | stosd |
||
1373 | push ecx esi edi |
||
1374 | movzx ecx, byte [esi+0x50] |
||
1375 | add esi, 0x52 |
||
1376 | test byte [edi-0x24], 1 |
||
1377 | jz .ansi |
||
1378 | shr ecx, 1 |
||
1379 | rep movsd |
||
1380 | adc ecx, ecx |
||
1381 | rep movsw |
||
1382 | and word [edi], 0 |
||
1383 | pop edi |
||
1384 | add edi, 520 |
||
1385 | pop esi ecx |
||
1386 | ret |
||
1387 | .ansi: |
||
1388 | jecxz .skip |
||
1389 | @@: |
||
1390 | lodsw |
||
1391 | call uni2ansi_char |
||
1392 | stosb |
||
1393 | loop @b |
||
1394 | .skip: |
||
1395 | xor al, al |
||
1396 | stosb |
||
1397 | pop edi |
||
1398 | add edi, 264 |
||
1399 | pop esi ecx |
||
1400 | ret |
||
1401 | |||
1402 | iglobal |
||
1403 | _24 dd 24 |
||
1404 | _60 dd 60 |
||
1405 | _10000000 dd 10000000 |
||
1406 | days400year dd 365*400+100-4+1 |
||
1407 | days100year dd 365*100+25-1 |
||
1408 | days4year dd 365*4+1 |
||
1409 | days1year dd 365 |
||
1410 | months dd 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 |
||
1411 | months2 dd 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 |
||
1412 | _400 dd 400 |
||
1413 | _100 dd 100 |
||
1414 | endg |
||
1415 | |||
1416 | ntfs_datetime_to_bdfe: |
||
1417 | ; edx:eax = number of 100-nanosecond intervals since January 1, 1601, in UTC |
||
1418 | push eax |
||
1419 | mov eax, edx |
||
1420 | xor edx, edx |
||
1421 | div [_10000000] |
||
1422 | xchg eax, [esp] |
||
1423 | div [_10000000] |
||
1424 | pop edx |
||
1425 | ; edx:eax = number of seconds since January 1, 1601 |
||
1426 | push eax |
||
1427 | mov eax, edx |
||
1428 | xor edx, edx |
||
1429 | div [_60] |
||
1430 | xchg eax, [esp] |
||
1431 | div [_60] |
||
1432 | mov [edi], dl |
||
1433 | pop edx |
||
1434 | ; edx:eax = number of minutes |
||
1435 | div [_60] |
||
1436 | mov [edi+1], dl |
||
1437 | ; eax = number of hours (note that 2^64/(10^7*60*60) < 2^32) |
||
1438 | xor edx, edx |
||
1439 | div [_24] |
||
1440 | mov [edi+2], dl |
||
1441 | mov [edi+3], byte 0 |
||
1442 | ; eax = number of days since January 1, 1601 |
||
1443 | xor edx, edx |
||
1444 | div [days400year] |
||
1445 | imul eax, 400 |
||
1446 | add eax, 1601 |
||
1447 | mov [edi+6], ax |
||
1448 | mov eax, edx |
||
1449 | xor edx, edx |
||
1450 | div [days100year] |
||
1451 | cmp al, 4 |
||
1452 | jnz @f |
||
1453 | dec eax |
||
1454 | add edx, [days100year] |
||
1455 | @@: |
||
1456 | imul eax, 100 |
||
1457 | add [edi+6], ax |
||
1458 | mov eax, edx |
||
1459 | xor edx, edx |
||
1460 | div [days4year] |
||
1461 | shl eax, 2 |
||
1462 | add [edi+6], ax |
||
1463 | mov eax, edx |
||
1464 | xor edx, edx |
||
1465 | div [days1year] |
||
1466 | cmp al, 4 |
||
1467 | jnz @f |
||
1468 | dec eax |
||
1469 | add edx, [days1year] |
||
1470 | @@: |
||
1471 | add [edi+6], ax |
||
1472 | push esi edx |
||
1473 | mov esi, months |
||
1474 | movzx eax, word [edi+6] |
||
1475 | test al, 3 |
||
1476 | jnz .noleap |
||
1477 | xor edx, edx |
||
1478 | push eax |
||
1479 | div [_400] |
||
1480 | pop eax |
||
1481 | test edx, edx |
||
1482 | jz .leap |
||
1483 | xor edx, edx |
||
1484 | div [_100] |
||
1485 | test edx, edx |
||
1486 | jz .noleap |
||
1487 | .leap: |
||
1488 | mov esi, months2 |
||
1489 | .noleap: |
||
1490 | pop edx |
||
1491 | xor eax, eax |
||
1492 | inc eax |
||
1493 | @@: |
||
1494 | sub edx, [esi] |
||
1495 | jb @f |
||
1496 | add esi, 4 |
||
1497 | inc eax |
||
1498 | jmp @b |
||
1499 | @@: |
||
1500 | add edx, [esi] |
||
1501 | pop esi |
||
1502 | inc edx |
||
1503 | mov [edi+4], dl |
||
1504 | mov [edi+5], al |
||
1505 | add edi, 8 |
||
1506 | ret |
||
1507 | |||
1508 | ;---------------------------------------------------------------- |
||
1509 | ; |
||
1510 | ; ntfs_HdRewrite - write to NTFS hard disk |
||
1511 | ; |
||
1512 | ; esi points to filename |
||
1513 | ; ebx ignored (reserved) |
||
1514 | ; ecx number of bytes to write, 0+ |
||
1515 | ; edx mem location to data |
||
1516 | ; |
||
1517 | ; ret ebx = number of written bytes |
||
1518 | ; eax = 0 ok read or other = errormsg |
||
1519 | ; |
||
1520 | ;-------------------------------------------------------------- |
||
1521 | ntfs_HdRewrite: |
||
1522 | xor ebx, ebx |
||
1523 | mov eax, ERROR_UNSUPPORTED_FS |
||
1524 | ret |
||
1525 | |||
1526 | ;---------------------------------------------------------------- |
||
1527 | ; |
||
1528 | ; ntfs_HdWrite - write to NTFS hard disk |
||
1529 | ; |
||
1530 | ; esi points to filename |
||
1531 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1532 | ; may be ebx=0 - start from first byte |
||
1533 | ; ecx number of bytes to write, 0+ |
||
1534 | ; edx mem location to data |
||
1535 | ; |
||
1536 | ; ret ebx = bytes written (maybe 0) |
||
1537 | ; eax = 0 ok write or other = errormsg |
||
1538 | ; |
||
1539 | ;-------------------------------------------------------------- |
||
1540 | ntfs_HdWrite: |
||
1541 | xor ebx, ebx |
||
1542 | mov eax, ERROR_UNSUPPORTED_FS |
||
1543 | ret |
||
1544 | |||
1545 | ;---------------------------------------------------------------- |
||
1546 | ; |
||
1547 | ; ntfs_HdSetFileEnd - set end of file on NTFS hard disk |
||
1548 | ; |
||
1549 | ; esi points to filename |
||
1550 | ; ebx points to 64-bit number = new file size |
||
1551 | ; ecx ignored (reserved) |
||
1552 | ; edx ignored (reserved) |
||
1553 | ; |
||
1554 | ; ret eax = 0 ok or other = errormsg |
||
1555 | ; |
||
1556 | ;-------------------------------------------------------------- |
||
1557 | ntfs_HdSetFileEnd: |
||
1558 | ntfs_HdSetFileInfo: |
||
1559 | ;---------------------------------------------------------------- |
||
1560 | ; |
||
1561 | ; ntfs_HdDelete - delete file or empty folder from NTFS hard disk |
||
1562 | ; |
||
1563 | ; esi points to filename |
||
1564 | ; |
||
1565 | ; ret eax = 0 ok or other = errormsg |
||
1566 | ; |
||
1567 | ;-------------------------------------------------------------- |
||
1568 | ntfs_HdDelete: |
||
1569 | mov eax, ERROR_UNSUPPORTED_FS |
||
1570 | ret |
||
1571 | |||
1572 | ntfs_HdGetFileInfo: |
||
1573 | mov eax, ERROR_UNSUPPORTED_FS |
||
1574 | ret>=>=>=> |
||
1575 |