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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
593 | mikedld | 8 | $Revision: 1378 $ |
9 | |||
10 | |||
65 | mario79 | 11 | ;************************************************************* |
578 | mario79 | 12 | ;* 12.07.2007 Check all 4 entry of MBR and EMBR |
13 | ;* 29.04.2006 Elimination of hangup after the |
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14 | ;* expiration hd_wait_timeout - Mario79 |
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15 | ;* 28.01.2006 find all Fat16/32 partition in all input point |
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16 | ;* to MBR - Mario79 |
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65 | mario79 | 17 | ;************************************************************* |
18 | |||
277 | diamond | 19 | uglobal |
65 | mario79 | 20 | align 4 |
256 | diamond | 21 | |
65 | mario79 | 22 | ;****************************************************** |
431 | serge | 23 | ; Please do not change this place - variables in text |
65 | mario79 | 24 | ; Mario79 |
25 | ; START place |
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26 | ;****************************************************** |
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27 | PARTITION_START dd 0x3f |
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28 | PARTITION_END dd 0 |
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1378 | turbanoff | 29 | fs_type db 0 ; 0=none, 1=NTFS, 2=EXT2/3, 16=FAT16, 32=FAT32 |
277 | diamond | 30 | align 4 |
256 | diamond | 31 | |
32 | fs_dependent_data_start: |
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33 | ; FATxx data |
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34 | |||
65 | mario79 | 35 | SECTORS_PER_FAT dd 0x1f3a |
36 | NUMBER_OF_FATS dd 0x2 |
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37 | SECTORS_PER_CLUSTER dd 0x8 |
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38 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
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39 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
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40 | FAT_START dd 0 ; start of fat table |
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41 | ROOT_START dd 0 ; start of rootdir (only fat16) |
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42 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
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43 | DATA_START dd 0 ; start of data area (=first cluster 2) |
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44 | LAST_CLUSTER dd 0 ; last availabe cluster |
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45 | ADR_FSINFO dd 0 ; used only by fat32 |
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46 | |||
47 | fatRESERVED dd 0x0FFFFFF6 |
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48 | fatBAD dd 0x0FFFFFF7 |
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49 | fatEND dd 0x0FFFFFF8 |
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50 | fatMASK dd 0x0FFFFFFF |
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51 | |||
649 | diamond | 52 | fatStartScan dd 2 |
53 | |||
256 | diamond | 54 | fs_dependent_data_end: |
321 | diamond | 55 | file_system_data_size = $ - PARTITION_START |
56 | if file_system_data_size > 96 |
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57 | ERROR: sizeof(file system data) too big! |
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1378 | turbanoff | 58 | end if |
256 | diamond | 59 | |
60 | virtual at fs_dependent_data_start |
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61 | ; NTFS data |
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62 | ntfs_data: |
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63 | .sectors_per_cluster dd ? |
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64 | .mft_cluster dd ? |
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65 | .mftmirr_cluster dd ? |
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66 | .frs_size dd ? ; FRS size in bytes |
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67 | .iab_size dd ? ; IndexAllocationBuffer size in bytes |
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68 | .frs_buffer dd ? |
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69 | .iab_buffer dd ? |
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70 | .mft_retrieval dd ? |
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71 | .mft_retrieval_size dd ? |
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72 | .mft_retrieval_alloc dd ? |
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73 | .mft_retrieval_end dd ? |
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74 | .cur_index_size dd ? |
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75 | .cur_index_buf dd ? |
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76 | if $ > fs_dependent_data_end |
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77 | ERROR: increase sizeof(fs_dependent_data)! |
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78 | end if |
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1378 | turbanoff | 79 | end virtual |
80 | |||
81 | virtual at fs_dependent_data_start |
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82 | ; EXT2 data |
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83 | ext2_data: |
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84 | .log_block_size dd ? |
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85 | .block_size dd ? |
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86 | .count_block_in_block dd ? |
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87 | .blocks_per_group dd ? |
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88 | .inodes_per_group dd ? |
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89 | .global_desc_table dd ? |
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90 | .root_inode dd ? ; pointer to root inode in memory |
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91 | .inode_size dd ? |
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92 | .count_pointer_in_block dd ? ; block_size / 4 |
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93 | .count_pointer_in_block_square dd ? ; (block_size / 4)**2 |
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94 | .ext2_save_block dd ? ; блок на глобальную 1 процедуру |
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95 | .ext2_temp_block dd ? ; блок для мелких процедур |
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96 | .ext2_save_inode dd ? ; inode на глобальную процедуру |
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97 | .ext2_temp_inode dd ? ; inode для мелких процедур |
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98 | if $ > fs_dependent_data_end |
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99 | ERROR: increase sizeof(fs_dependent_data)! |
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100 | end if |
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256 | diamond | 101 | end virtual |
1378 | turbanoff | 102 | |
65 | mario79 | 103 | ;*************************************************************************** |
104 | ; End place |
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105 | ; Mario79 |
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106 | ;*************************************************************************** |
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277 | diamond | 107 | endg |
108 | iglobal |
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65 | mario79 | 109 | |
110 | partition_types: ; list of fat16/32 partitions |
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111 | db 0x04 ; DOS: fat16 <32M |
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112 | db 0x06 ; DOS: fat16 >32M |
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113 | db 0x0b ; WIN95: fat32 |
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114 | db 0x0c ; WIN95: fat32, LBA-mapped |
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115 | db 0x0e ; WIN95: fat16, LBA-mapped |
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116 | db 0x14 ; Hidden DOS: fat16 <32M |
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117 | db 0x16 ; Hidden DOS: fat16 >32M |
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118 | db 0x1b ; Hidden WIN95: fat32 |
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119 | db 0x1c ; Hidden WIN95: fat32, LBA-mapped |
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120 | db 0x1e ; Hidden WIN95: fat16, LBA-mapped |
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121 | db 0xc4 ; DRDOS/secured: fat16 <32M |
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122 | db 0xc6 ; DRDOS/secured: fat16 >32M |
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123 | db 0xcb ; DRDOS/secured: fat32 |
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124 | db 0xcc ; DRDOS/secured: fat32, LBA-mapped |
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125 | db 0xce ; DRDOS/secured: fat16, LBA-mapped |
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126 | db 0xd4 ; Old Multiuser DOS secured: fat16 <32M |
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127 | db 0xd6 ; Old Multiuser DOS secured: fat16 >32M |
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256 | diamond | 128 | db 0x07 ; NTFS |
1378 | turbanoff | 129 | db 0x17 ; NTFS, hidden |
130 | db 0x83 ; Linux native file system (ext2fs) |
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65 | mario79 | 131 | partition_types_end: |
132 | |||
133 | |||
134 | extended_types: ; list of extended partitions |
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135 | db 0x05 ; DOS: extended partition |
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136 | db 0x0f ; WIN95: extended partition, LBA-mapped |
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137 | db 0xc5 ; DRDOS/secured: extended partition |
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138 | db 0xd5 ; Old Multiuser DOS secured: extended partition |
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139 | extended_types_end: |
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140 | |||
141 | endg |
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142 | |||
143 | ; Partition chain used: |
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1378 | turbanoff | 144 | ; MBR <--------------------- |
145 | ; | | |
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146 | ; |-> PARTITION1 | |
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147 | ; |-> EXTENDED PARTITION - ;not need be second partition |
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148 | ; |-> PARTITION3 |
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149 | ; |-> PARTITION4 |
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150 | |||
151 | set_PARTITION_variables: |
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152 | set_FAT32_variables: ;deprecated |
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65 | mario79 | 153 | mov [problem_partition],0 |
154 | call reserve_hd1 |
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321 | diamond | 155 | call reserve_hd_channel |
65 | mario79 | 156 | |
709 | diamond | 157 | pushad |
158 | |||
65 | mario79 | 159 | cmp dword [hdpos],0 |
160 | je problem_hd |
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161 | |||
162 | xor ecx,ecx ; partition count |
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1378 | turbanoff | 163 | or edx,-1 ; flag for partition |
164 | xor eax,eax ; address MBR |
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65 | mario79 | 165 | xor ebp,ebp ; extended partition start |
166 | |||
1378 | turbanoff | 167 | new_mbr: |
168 | test ebp,ebp ; is there extended partition? (MBR or EMBR) |
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65 | mario79 | 169 | jnz extended_already_set ; yes |
170 | xchg ebp,eax ; no. set it now |
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171 | |||
172 | extended_already_set: |
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173 | add eax,ebp ; mbr=mbr+0, ext_part=ext_start+relat_start |
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174 | mov ebx,buffer |
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175 | call hd_read |
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74 | mario79 | 176 | cmp [hd_error],0 |
177 | jne problem_hd |
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65 | mario79 | 178 | |
179 | cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector? |
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180 | jnz end_partition_chain |
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181 | cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition |
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1378 | turbanoff | 182 | jnz test_primary_partition_0 |
578 | mario79 | 183 | cmp dword [ebx+0x1be+0xc+16],0 |
1378 | turbanoff | 184 | jnz test_primary_partition_1 |
578 | mario79 | 185 | cmp dword [ebx+0x1be+0xc+16+16],0 |
1378 | turbanoff | 186 | jnz test_primary_partition_2 |
578 | mario79 | 187 | cmp dword [ebx+0x1be+0xc+16+16+16],0 |
1378 | turbanoff | 188 | jnz test_primary_partition_3 |
189 | jmp end_partition_chain |
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190 | |||
191 | test_primary_partition_0: |
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65 | mario79 | 192 | push eax |
193 | mov al,[ebx+0x1be+4] ; get primary partition type |
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194 | call scan_partition_types |
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195 | pop eax |
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1378 | turbanoff | 196 | jnz test_primary_partition_1 ; no. skip over |
65 | mario79 | 197 | |
198 | inc ecx |
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1378 | turbanoff | 199 | cmp ecx,[known_part] ; is it wanted partition? |
200 | jnz test_primary_partition_1 ; no |
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65 | mario79 | 201 | |
256 | diamond | 202 | mov edx, eax ; start sector |
203 | add edx, [ebx+0x1be+8] ; add relative start |
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204 | push edx |
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205 | add edx, [ebx+0x1be+12] ; add length |
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206 | dec edx ; PARTITION_END is inclusive |
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207 | mov [PARTITION_END], edx ; note that this can be changed |
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208 | ; when file system data will be available |
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209 | mov dl, [ebx+0x1be+4] |
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210 | mov [fs_type], dl ; save for FS recognizer (separate FAT vs NTFS) |
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211 | pop edx |
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212 | |||
1378 | turbanoff | 213 | test_primary_partition_1: |
65 | mario79 | 214 | push eax |
215 | mov al,[ebx+0x1be+4+16] ; get primary partition type |
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216 | call scan_partition_types |
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217 | pop eax |
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1378 | turbanoff | 218 | jnz test_primary_partition_2 ; no. skip over |
65 | mario79 | 219 | |
220 | inc ecx |
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1378 | turbanoff | 221 | cmp ecx,[known_part] ; is it wanted partition? |
222 | jnz test_primary_partition_2 ; no |
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65 | mario79 | 223 | |
256 | diamond | 224 | mov edx, eax |
225 | add edx, [ebx+0x1be+8+16] |
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226 | push edx |
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227 | add edx, [ebx+0x1be+12+16] |
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228 | dec edx |
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229 | mov [PARTITION_END], edx |
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230 | mov dl, [ebx+0x1be+4+16] |
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231 | mov [fs_type], dl |
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232 | pop edx |
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65 | mario79 | 233 | |
1378 | turbanoff | 234 | test_primary_partition_2: |
65 | mario79 | 235 | push eax |
236 | mov al,[ebx+0x1be+4+16+16] ; get primary partition type |
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237 | call scan_partition_types |
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238 | pop eax |
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1378 | turbanoff | 239 | jnz test_primary_partition_3 ; no. skip over |
65 | mario79 | 240 | |
241 | inc ecx |
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1378 | turbanoff | 242 | cmp ecx,[known_part] ; is it wanted partition? |
243 | jnz test_primary_partition_3 ; no |
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65 | mario79 | 244 | |
256 | diamond | 245 | mov edx, eax |
246 | add edx, [ebx+0x1be+8+16+16] |
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247 | push edx |
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248 | add edx, [ebx+0x1be+12+16+16] |
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249 | dec edx |
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250 | mov [PARTITION_END], edx |
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251 | mov dl, [ebx+0x1be+4+16+16] |
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252 | mov [fs_type], dl |
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253 | pop edx |
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65 | mario79 | 254 | |
1378 | turbanoff | 255 | test_primary_partition_3: |
65 | mario79 | 256 | push eax |
257 | mov al,[ebx+0x1be+4+16+16+16] ; get primary partition type |
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258 | call scan_partition_types |
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259 | pop eax |
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1378 | turbanoff | 260 | jnz test_ext_partition_0 ; no. skip over |
65 | mario79 | 261 | |
262 | inc ecx |
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1378 | turbanoff | 263 | cmp ecx,[known_part] ; is it wanted partition? |
264 | jnz test_ext_partition_0 ; no |
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65 | mario79 | 265 | |
256 | diamond | 266 | mov edx, eax |
267 | add edx, [ebx+0x1be+8+16+16+16] |
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268 | push edx |
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269 | add edx, [ebx+0x1be+12+16+16+16] |
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270 | dec edx |
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271 | mov [PARTITION_END], edx |
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272 | mov dl, [ebx+0x1be+4+16+16+16] |
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273 | mov [fs_type], dl |
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274 | pop edx |
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65 | mario79 | 275 | |
1378 | turbanoff | 276 | test_ext_partition_0: |
65 | mario79 | 277 | push eax |
278 | mov al,[ebx+0x1be+4] ; get extended partition type |
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279 | call scan_extended_types |
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280 | pop eax |
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1378 | turbanoff | 281 | jnz test_ext_partition_1 |
65 | mario79 | 282 | |
283 | mov eax,[ebx+0x1be+8] ; add relative start |
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284 | test eax,eax ; is there extended partition? |
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1378 | turbanoff | 285 | jnz new_mbr ; yes. read it |
65 | mario79 | 286 | |
1378 | turbanoff | 287 | test_ext_partition_1: |
65 | mario79 | 288 | push eax |
289 | mov al,[ebx+0x1be+4+16] ; get extended partition type |
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290 | call scan_extended_types |
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291 | pop eax |
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1378 | turbanoff | 292 | jnz test_ext_partition_2 |
65 | mario79 | 293 | |
1378 | turbanoff | 294 | mov eax,[ebx+0x1be+8+16] ; add relative start |
65 | mario79 | 295 | test eax,eax ; is there extended partition? |
1378 | turbanoff | 296 | jnz new_mbr ; yes. read it |
65 | mario79 | 297 | |
1378 | turbanoff | 298 | test_ext_partition_2: |
65 | mario79 | 299 | push eax |
300 | mov al,[ebx+0x1be+4+16+16] ; get extended partition type |
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301 | call scan_extended_types |
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302 | pop eax |
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1378 | turbanoff | 303 | jnz test_ext_partition_3 |
65 | mario79 | 304 | |
305 | mov eax,[ebx+0x1be+8+16+16] ; add relative start |
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306 | test eax,eax ; is there extended partition? |
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1378 | turbanoff | 307 | jnz new_mbr ; yes. read it |
308 | |||
309 | test_ext_partition_3: |
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65 | mario79 | 310 | push eax |
311 | mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type |
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312 | call scan_extended_types |
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313 | pop eax |
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314 | jnz end_partition_chain ; no. end chain |
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315 | |||
316 | mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition |
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317 | test eax,eax ; is there extended partition? |
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1378 | turbanoff | 318 | jnz new_mbr ; yes. read it |
319 | |||
65 | mario79 | 320 | end_partition_chain: |
321 | mov [partition_count],ecx |
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322 | |||
323 | cmp edx,-1 ; found wanted partition? |
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324 | jnz hd_and_partition_ok ; yes. install it |
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325 | jmp problem_partition_or_fat |
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326 | |||
327 | scan_partition_types: |
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328 | push ecx |
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329 | mov edi,partition_types |
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330 | mov ecx,partition_types_end-partition_types |
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331 | cld |
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332 | repne scasb ; is partition type ok? |
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333 | pop ecx |
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334 | ret |
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335 | |||
336 | scan_extended_types: |
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337 | push ecx |
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338 | mov edi,extended_types |
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339 | mov ecx,extended_types_end-extended_types |
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340 | cld |
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341 | repne scasb ; is it extended partition? |
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342 | pop ecx |
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343 | ret |
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344 | |||
345 | problem_fat_dec_count: ; bootsector is missing or another problem |
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346 | dec [partition_count] ; remove it from partition_count |
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347 | |||
348 | problem_partition_or_fat: |
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709 | diamond | 349 | problem_hd: |
65 | mario79 | 350 | popad |
351 | |||
256 | diamond | 352 | mov [fs_type],0 |
321 | diamond | 353 | call free_hd_channel |
65 | mario79 | 354 | mov [hd1_status],0 ; free |
355 | mov [problem_partition],1 |
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356 | ret |
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357 | |||
358 | hd_and_partition_ok: |
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359 | mov eax,edx |
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360 | mov [PARTITION_START],eax |
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256 | diamond | 361 | mov edx, [PARTITION_END] |
362 | sub edx, eax |
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363 | inc edx ; edx = length of partition |
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65 | mario79 | 364 | |
256 | diamond | 365 | ; mov [hd_setup],1 |
65 | mario79 | 366 | mov ebx,buffer |
367 | call hd_read ; read boot sector of partition |
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256 | diamond | 368 | cmp [hd_error], 0 |
369 | jz boot_read_ok |
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370 | cmp [fs_type], 7 |
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371 | jnz problem_fat_dec_count |
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372 | ; NTFS duplicates bootsector: |
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373 | ; NT4/2k/XP+ saves bootsector copy in the end of disk |
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374 | ; NT 3.51 saves bootsector copy in the middle of disk |
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375 | and [hd_error], 0 |
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376 | mov eax, [PARTITION_END] |
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377 | call hd_read |
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378 | cmp [hd_error], 0 |
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379 | jnz @f |
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380 | call ntfs_test_bootsec |
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381 | jnc boot_read_ok |
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382 | @@: |
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383 | and [hd_error], 0 |
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384 | mov eax, edx |
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385 | shr eax, 1 |
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386 | add eax, [PARTITION_START] |
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387 | call hd_read |
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388 | cmp [hd_error], 0 |
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1378 | turbanoff | 389 | jnz problem_fat_dec_count ; no chance... |
256 | diamond | 390 | boot_read_ok: |
1378 | turbanoff | 391 | |
256 | diamond | 392 | ; if we are running on NTFS, check bootsector |
74 | mario79 | 393 | |
1378 | turbanoff | 394 | call ntfs_test_bootsec ; test ntfs |
395 | jnc ntfs_setup |
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396 | |||
397 | call ext2_test_superblock ; test ext2fs |
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398 | jnc ext2_setup |
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399 | |||
400 | mov eax, [PARTITION_START] ;ext2 test changes [buffer] |
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401 | call hd_read |
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402 | cmp [hd_error], 0 |
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403 | jnz problem_fat_dec_count |
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404 | |||
65 | mario79 | 405 | cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector? |
406 | jnz problem_fat_dec_count |
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407 | |||
408 | movzx eax,word [ebx+0xe] ; sectors reserved |
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409 | add eax,[PARTITION_START] |
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410 | mov [FAT_START],eax ; fat_start = partition_start + reserved |
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411 | |||
412 | movzx eax,byte [ebx+0xd] ; sectors per cluster |
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1190 | diamond | 413 | test eax,eax |
414 | jz problem_fat_dec_count |
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65 | mario79 | 415 | mov [SECTORS_PER_CLUSTER],eax |
416 | |||
417 | movzx ecx,word [ebx+0xb] ; bytes per sector |
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1191 | diamond | 418 | cmp ecx,0x200 |
1190 | diamond | 419 | jnz problem_fat_dec_count |
65 | mario79 | 420 | mov [BYTES_PER_SECTOR],ecx |
421 | |||
422 | movzx eax,word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
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423 | mov edx,32 |
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424 | mul edx |
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425 | dec ecx |
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426 | add eax,ecx ; round up if not equal count |
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427 | inc ecx ; bytes per sector |
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428 | div ecx |
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429 | mov [ROOT_SECTORS],eax ; count of rootdir sectors |
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430 | |||
431 | movzx eax,word [ebx+0x16] ; sectors per fat <65536 |
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432 | test eax,eax |
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433 | jnz fat16_fatsize |
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434 | mov eax,[ebx+0x24] ; sectors per fat |
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435 | fat16_fatsize: |
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436 | mov [SECTORS_PER_FAT],eax |
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437 | |||
438 | movzx eax,byte [ebx+0x10] ; number of fats |
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439 | test eax,eax ; if 0 it's not fat partition |
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440 | jz problem_fat_dec_count |
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441 | mov [NUMBER_OF_FATS],eax |
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442 | imul eax,[SECTORS_PER_FAT] |
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443 | add eax,[FAT_START] |
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444 | mov [ROOT_START],eax ; rootdir = fat_start + fat_size * fat_count |
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445 | add eax,[ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
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446 | mov [DATA_START],eax ; data area = rootdir + rootdir_size |
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447 | |||
448 | movzx eax,word [ebx+0x13] ; total sector count <65536 |
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449 | test eax,eax |
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450 | jnz fat16_total |
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451 | mov eax,[ebx+0x20] ; total sector count |
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452 | fat16_total: |
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453 | add eax,[PARTITION_START] |
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454 | dec eax |
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455 | mov [PARTITION_END],eax |
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456 | inc eax |
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457 | sub eax,[DATA_START] ; eax = count of data sectors |
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458 | xor edx,edx |
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459 | div dword [SECTORS_PER_CLUSTER] |
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460 | inc eax |
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461 | mov [LAST_CLUSTER],eax |
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462 | dec eax ; cluster count |
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649 | diamond | 463 | mov [fatStartScan],2 |
65 | mario79 | 464 | |
465 | ; limits by Microsoft Hardware White Paper v1.03 |
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466 | cmp eax,4085 ; 0xff5 |
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467 | jb problem_fat_dec_count ; fat12 not supported |
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468 | cmp eax,65525 ; 0xfff5 |
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469 | jb fat16_partition |
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470 | |||
471 | fat32_partition: |
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472 | mov eax,[ebx+0x2c] ; rootdir cluster |
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473 | mov [ROOT_CLUSTER],eax |
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474 | movzx eax,word [ebx+0x30] ; fs info sector |
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475 | add eax,[PARTITION_START] |
||
476 | mov [ADR_FSINFO],eax |
||
649 | diamond | 477 | call hd_read |
478 | mov eax,[ebx+0x1ec] |
||
479 | cmp eax,-1 |
||
480 | jz @f |
||
481 | mov [fatStartScan],eax |
||
482 | @@: |
||
65 | mario79 | 483 | |
484 | popad |
||
485 | |||
486 | mov [fatRESERVED],0x0FFFFFF6 |
||
487 | mov [fatBAD],0x0FFFFFF7 |
||
488 | mov [fatEND],0x0FFFFFF8 |
||
489 | mov [fatMASK],0x0FFFFFFF |
||
256 | diamond | 490 | mov [fs_type],32 ; Fat32 |
321 | diamond | 491 | call free_hd_channel |
65 | mario79 | 492 | mov [hd1_status],0 ; free |
493 | ret |
||
494 | |||
495 | fat16_partition: |
||
496 | xor eax,eax |
||
497 | mov [ROOT_CLUSTER],eax |
||
498 | |||
499 | popad |
||
500 | |||
501 | mov [fatRESERVED],0x0000FFF6 |
||
502 | mov [fatBAD],0x0000FFF7 |
||
503 | mov [fatEND],0x0000FFF8 |
||
504 | mov [fatMASK],0x0000FFFF |
||
256 | diamond | 505 | mov [fs_type],16 ; Fat16 |
321 | diamond | 506 | call free_hd_channel |
65 | mario79 | 507 | mov [hd1_status],0 ; free |
1378 | turbanoff | 508 | ret65536 |
509 |