mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-27 08:49:40 +03:00
532 lines
18 KiB
PHP
532 lines
18 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision$
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;*************************************************************
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;* 13.02.2010 Find all partition and check supported FS
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;* 12.07.2007 Check all 4 entry of MBR and EMBR
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;* 29.04.2006 Elimination of hangup after the
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;* expiration hd_wait_timeout - Mario79
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;* 28.01.2006 find all Fat16/32 partition in all input point
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;* to MBR - Mario79
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;*************************************************************
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uglobal
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align 4
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;******************************************************
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; Please do not change this place - variables in text
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; Mario79
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; START place
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;******************************************************
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PARTITION_START dd 0x3f
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PARTITION_END dd 0
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fs_type db 0 ; 1=NTFS, 2=EXT2/3, 16=FAT16, 32=FAT32
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align 4
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fs_dependent_data_start:
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; FATxx data
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SECTORS_PER_FAT dd 0x1f3a
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NUMBER_OF_FATS dd 0x2
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SECTORS_PER_CLUSTER dd 0x8
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BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes
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ROOT_CLUSTER dd 2 ; first rootdir cluster
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FAT_START dd 0 ; start of fat table
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ROOT_START dd 0 ; start of rootdir (only fat16)
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ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16)
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DATA_START dd 0 ; start of data area (=first cluster 2)
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LAST_CLUSTER dd 0 ; last availabe cluster
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ADR_FSINFO dd 0 ; used only by fat32
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fatRESERVED dd 0x0FFFFFF6
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fatBAD dd 0x0FFFFFF7
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fatEND dd 0x0FFFFFF8
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fatMASK dd 0x0FFFFFFF
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fatStartScan dd 2
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fs_dependent_data_end:
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file_system_data_size = $ - PARTITION_START
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if file_system_data_size > 96
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ERROR: sizeof(file system data) too big!
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end if
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virtual at fs_dependent_data_start
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; NTFS data
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ntfs_data:
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.sectors_per_cluster dd ?
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.mft_cluster dd ?
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.mftmirr_cluster dd ?
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.frs_size dd ? ; FRS size in bytes
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.iab_size dd ? ; IndexAllocationBuffer size in bytes
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.frs_buffer dd ?
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.iab_buffer dd ?
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.mft_retrieval dd ?
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.mft_retrieval_size dd ?
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.mft_retrieval_alloc dd ?
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.mft_retrieval_end dd ?
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.cur_index_size dd ?
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.cur_index_buf dd ?
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if $ > fs_dependent_data_end
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ERROR: increase sizeof(fs_dependent_data)!
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end if
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end virtual
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virtual at fs_dependent_data_start
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; EXT2 data
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ext2_data:
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.log_block_size dd ?
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.block_size dd ?
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.count_block_in_block dd ?
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.blocks_per_group dd ?
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.inodes_per_group dd ?
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.global_desc_table dd ?
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.root_inode dd ? ; pointer to root inode in memory
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.inode_size dd ?
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.count_pointer_in_block dd ? ; block_size / 4
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.count_pointer_in_block_square dd ? ; (block_size / 4)**2
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.ext2_save_block dd ? ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 1 <EFBFBD><EFBFBD><EFBFBD>楤<EFBFBD><EFBFBD><EFBFBD>
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.ext2_temp_block dd ? ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>楤<EFBFBD><EFBFBD>
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.ext2_save_inode dd ? ; inode <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>楤<EFBFBD><EFBFBD><EFBFBD>
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.ext2_temp_inode dd ? ; inode <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>楤<EFBFBD><EFBFBD>
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.sb dd ? ; superblock
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.groups_count dd ?
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if $ > fs_dependent_data_end
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ERROR: increase sizeof(fs_dependent_data)!
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end if
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end virtual
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;***************************************************************************
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; End place
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; Mario79
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;***************************************************************************
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endg
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iglobal
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partition_types: ; list of fat16/32 partitions
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db 0x04 ; DOS: fat16 <32M
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db 0x06 ; DOS: fat16 >32M
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db 0x0b ; WIN95: fat32
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db 0x0c ; WIN95: fat32, LBA-mapped
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db 0x0e ; WIN95: fat16, LBA-mapped
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db 0x14 ; Hidden DOS: fat16 <32M
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db 0x16 ; Hidden DOS: fat16 >32M
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db 0x1b ; Hidden WIN95: fat32
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db 0x1c ; Hidden WIN95: fat32, LBA-mapped
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db 0x1e ; Hidden WIN95: fat16, LBA-mapped
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db 0xc4 ; DRDOS/secured: fat16 <32M
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db 0xc6 ; DRDOS/secured: fat16 >32M
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db 0xcb ; DRDOS/secured: fat32
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db 0xcc ; DRDOS/secured: fat32, LBA-mapped
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db 0xce ; DRDOS/secured: fat16, LBA-mapped
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db 0xd4 ; Old Multiuser DOS secured: fat16 <32M
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db 0xd6 ; Old Multiuser DOS secured: fat16 >32M
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db 0x07 ; NTFS
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db 0x27 ; NTFS, hidden
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db 0x83 ; Linux native file system (ext2fs)
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partition_types_end:
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extended_types: ; list of extended partitions
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db 0x05 ; DOS: extended partition
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db 0x0f ; WIN95: extended partition, LBA-mapped
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db 0xc5 ; DRDOS/secured: extended partition
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db 0xd5 ; Old Multiuser DOS secured: extended partition
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extended_types_end:
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endg
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; Partition chain used:
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; MBR <---------------------
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; | |
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; |-> PARTITION1 |
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; |-> EXTENDED PARTITION - ;not need be second partition
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; |-> PARTITION3
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; |-> PARTITION4
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set_PARTITION_variables:
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set_FAT32_variables: ;deprecated
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and [problem_partition], 0
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call reserve_hd1
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call reserve_hd_channel
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pushad
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cmp dword [hdpos],0
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je problem_hd
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xor ecx,ecx ; partition count
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;or edx,-1 ; flag for partition
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xor eax,eax ; address MBR
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xor ebp,ebp ; extended partition start
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new_mbr:
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test ebp,ebp ; is there extended partition? (MBR or EMBR)
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jnz extended_already_set ; yes
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xchg ebp,eax ; no. set it now
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extended_already_set:
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add eax,ebp ; mbr=mbr+0, ext_part=ext_start+relat_start
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mov ebx,buffer
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call hd_read
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cmp [hd_error],0
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jne problem_hd
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cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
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jnz end_partition_chain
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push eax ; push only one time
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cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition
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jnz test_primary_partition_0
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cmp dword [ebx+0x1be+0xc+16],0
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jnz test_primary_partition_1
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cmp dword [ebx+0x1be+0xc+16+16],0
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jnz test_primary_partition_2
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cmp dword [ebx+0x1be+0xc+16+16+16],0
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jnz test_primary_partition_3
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pop eax
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jmp end_partition_chain
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test_primary_partition_0:
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mov al,[ebx+0x1be+4] ; get primary partition type
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call scan_partition_types
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jnz test_primary_partition_1 ; no. skip over
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inc ecx
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cmp ecx,[known_part] ; is it wanted partition?
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jnz test_primary_partition_1 ; no
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pop eax
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;mov edx, eax ; start sector
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add eax, [ebx+0x1be+8] ; add relative start
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;mov [PARTITON_START],edx
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;push edx
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mov edx, [ebx+0x1be+12] ; length
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;add edx, eax ; add length
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;dec edx ; PARTITION_END is inclusive
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;mov [PARTITION_END], edx ; note that this can be changed
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; when file system data will be available
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mov cl, [ebx+0x1be+4] ; fs_type
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;mov [fs_type], dl ; save for FS recognizer (separate FAT vs NTFS)
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;pop edx
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jmp hd_and_partition_ok
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test_primary_partition_1:
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mov al,[ebx+0x1be+4+16] ; get primary partition type
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call scan_partition_types
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jnz test_primary_partition_2 ; no. skip over
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inc ecx
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cmp ecx,[known_part] ; is it wanted partition?
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jnz test_primary_partition_2 ; no
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pop eax
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add eax, [ebx+0x1be+8+16]
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mov edx, [ebx+0x1be+12+16]
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mov cl, [ebx+0x1be+4+16]
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jmp hd_and_partition_ok
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;mov edx, eax
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;add edx, [ebx+0x1be+8+16]
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;push edx
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;add edx, [ebx+0x1be+12+16]
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;dec edx
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;mov [PARTITION_END], edx
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;mov al, [ebx+0x1be+4+16]
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;mov [fs_type], dl
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;pop edx
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test_primary_partition_2:
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mov al,[ebx+0x1be+4+16+16] ; get primary partition type
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call scan_partition_types
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jnz test_primary_partition_3 ; no. skip over
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inc ecx
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cmp ecx,[known_part] ; is it wanted partition?
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jnz test_primary_partition_3 ; no
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pop eax
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add eax, [ebx+0x1be+8+16+16]
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mov edx, [ebx+0x1be+12+16+16]
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mov cl, [ebx+0x1be+4+16+16]
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jmp hd_and_partition_ok
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;mov edx, eax
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;add edx, [ebx+0x1be+8+16+16]
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;push edx
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;add edx, [ebx+0x1be+12+16+16]
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;dec edx
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;mov [PARTITION_END], edx
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;mov al, [ebx+0x1be+4+16+16]
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;mov [fs_type], dl
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;pop edx
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test_primary_partition_3:
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mov al,[ebx+0x1be+4+16+16+16] ; get primary partition type
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call scan_partition_types
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jnz test_ext_partition_0 ; no. skip over
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inc ecx
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cmp ecx,[known_part] ; is it wanted partition?
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jnz test_ext_partition_0 ; no
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pop eax
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add eax, [ebx+0x1be+8+16+16+16]
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mov edx, [ebx+0x1be+12+16+16+16]
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mov cl, [ebx+0x1be+4+16+16+16]
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jmp hd_and_partition_ok
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;mov edx, eax
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;add edx, [ebx+0x1be+8+16+16+16]
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;push edx
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;add edx, [ebx+0x1be+12+16+16+16]
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;dec edx
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;mov [PARTITION_END], edx
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;mov al, [ebx+0x1be+4+16+16+16]
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;mov [fs_type], dl
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;pop edx
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test_ext_partition_0:
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pop eax ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD>모<EFBFBD>뢠<EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD>⥪<EFBFBD>
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mov al,[ebx+0x1be+4] ; get extended partition type
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call scan_extended_types
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jnz test_ext_partition_1
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mov eax,[ebx+0x1be+8] ; add relative start
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test eax,eax ; is there extended partition?
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jnz new_mbr ; yes. read it
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test_ext_partition_1:
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mov al,[ebx+0x1be+4+16] ; get extended partition type
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call scan_extended_types
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jnz test_ext_partition_2
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mov eax,[ebx+0x1be+8+16] ; add relative start
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test eax,eax ; is there extended partition?
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jnz new_mbr ; yes. read it
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test_ext_partition_2:
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mov al,[ebx+0x1be+4+16+16] ; get extended partition type
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call scan_extended_types
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jnz test_ext_partition_3
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mov eax,[ebx+0x1be+8+16+16] ; add relative start
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test eax,eax ; is there extended partition?
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jnz new_mbr ; yes. read it
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test_ext_partition_3:
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mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type
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call scan_extended_types
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jnz end_partition_chain ; no. end chain
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mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition
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test eax,eax ; is there extended partition?
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jnz new_mbr ; yes. read it
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end_partition_chain:
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;mov [partition_count],ecx
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;cmp edx,-1 ; found wanted partition?
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;jnz hd_and_partition_ok ; yes. install it
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;jmp problem_partition_or_fat
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problem_hd:
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or [problem_partition], 2
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jmp return_from_part_set
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scan_partition_types:
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push ecx
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mov edi,partition_types
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mov ecx,partition_types_end-partition_types
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cld
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repne scasb ; is partition type ok?
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pop ecx
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ret
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scan_extended_types:
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push ecx
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mov edi,extended_types
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mov ecx,extended_types_end-extended_types
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cld
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repne scasb ; is it extended partition?
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pop ecx
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ret
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problem_fat_dec_count: ; bootsector is missing or another problem
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; dec [partition_count] ; remove it from partition_count
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problem_partition_or_fat:
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or [problem_partition],1
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return_from_part_set:
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popad
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;mov [fs_type],0
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call free_hd_channel
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mov [hd1_status],0 ; free
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ret
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hd_and_partition_ok:
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;eax = PARTITION_START edx=PARTITION_LENGTH cl=fs_type
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mov [fs_type], cl
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;mov eax,edx
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mov [PARTITION_START],eax
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add edx, eax
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dec edx
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mov [PARTITION_END], edx
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; mov edx, [PARTITION_END]
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; sub edx, eax
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; inc edx ; edx = length of partition <EFBFBD><EFBFBD>祬 <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>??
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; mov [hd_setup],1
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mov ebx,buffer
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call hd_read ; read boot sector of partition
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cmp [hd_error], 0
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jz boot_read_ok
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cmp [fs_type], 7
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jnz problem_fat_dec_count
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; NTFS duplicates bootsector:
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; NT4/2k/XP+ saves bootsector copy in the end of disk
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; NT 3.51 saves bootsector copy in the middle of disk
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and [hd_error], 0
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mov eax, [PARTITION_END]
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call hd_read
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cmp [hd_error], 0
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jnz @f
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call ntfs_test_bootsec
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jnc boot_read_ok
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@@:
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and [hd_error], 0
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mov eax, edx
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shr eax, 1
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add eax, [PARTITION_START]
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call hd_read
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cmp [hd_error], 0
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jnz problem_fat_dec_count ; no chance...
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boot_read_ok:
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; if we are running on NTFS, check bootsector
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call ntfs_test_bootsec ; test ntfs
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jnc ntfs_setup
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call ext2_test_superblock ; test ext2fs
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jnc ext2_setup
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mov eax, [PARTITION_START] ;ext2 test changes [buffer]
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call hd_read
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cmp [hd_error], 0
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jnz problem_fat_dec_count
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cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
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jnz problem_fat_dec_count
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movzx eax,word [ebx+0xe] ; sectors reserved
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add eax,[PARTITION_START]
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mov [FAT_START],eax ; fat_start = partition_start + reserved
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movzx eax,byte [ebx+0xd] ; sectors per cluster
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test eax,eax
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jz problem_fat_dec_count
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mov [SECTORS_PER_CLUSTER],eax
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movzx ecx,word [ebx+0xb] ; bytes per sector
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cmp ecx,0x200
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jnz problem_fat_dec_count
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mov [BYTES_PER_SECTOR],ecx
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movzx eax,word [ebx+0x11] ; count of rootdir entries (=0 fat32)
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mov edx,32
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mul edx
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dec ecx
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add eax,ecx ; round up if not equal count
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inc ecx ; bytes per sector
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div ecx
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mov [ROOT_SECTORS],eax ; count of rootdir sectors
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movzx eax,word [ebx+0x16] ; sectors per fat <65536
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test eax,eax
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jnz fat16_fatsize
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mov eax,[ebx+0x24] ; sectors per fat
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fat16_fatsize:
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mov [SECTORS_PER_FAT],eax
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movzx eax,byte [ebx+0x10] ; number of fats
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test eax,eax ; if 0 it's not fat partition
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jz problem_fat_dec_count
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mov [NUMBER_OF_FATS],eax
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imul eax,[SECTORS_PER_FAT]
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add eax,[FAT_START]
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mov [ROOT_START],eax ; rootdir = fat_start + fat_size * fat_count
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add eax,[ROOT_SECTORS] ; rootdir sectors should be 0 on fat32
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mov [DATA_START],eax ; data area = rootdir + rootdir_size
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movzx eax,word [ebx+0x13] ; total sector count <65536
|
||
test eax,eax
|
||
jnz fat16_total
|
||
mov eax,[ebx+0x20] ; total sector count
|
||
fat16_total:
|
||
add eax,[PARTITION_START]
|
||
dec eax
|
||
mov [PARTITION_END],eax
|
||
inc eax
|
||
sub eax,[DATA_START] ; eax = count of data sectors
|
||
xor edx,edx
|
||
div dword [SECTORS_PER_CLUSTER]
|
||
inc eax
|
||
mov [LAST_CLUSTER],eax
|
||
dec eax ; cluster count
|
||
mov [fatStartScan],2
|
||
|
||
; limits by Microsoft Hardware White Paper v1.03
|
||
cmp eax,4085 ; 0xff5
|
||
jb problem_fat_dec_count ; fat12 not supported
|
||
cmp eax,65525 ; 0xfff5
|
||
jb fat16_partition
|
||
|
||
fat32_partition:
|
||
mov eax,[ebx+0x2c] ; rootdir cluster
|
||
mov [ROOT_CLUSTER],eax
|
||
movzx eax,word [ebx+0x30] ; fs info sector
|
||
add eax,[PARTITION_START]
|
||
mov [ADR_FSINFO],eax
|
||
call hd_read
|
||
mov eax,[ebx+0x1ec]
|
||
cmp eax,-1
|
||
jz @f
|
||
mov [fatStartScan],eax
|
||
@@:
|
||
|
||
popad
|
||
|
||
mov [fatRESERVED],0x0FFFFFF6
|
||
mov [fatBAD],0x0FFFFFF7
|
||
mov [fatEND],0x0FFFFFF8
|
||
mov [fatMASK],0x0FFFFFFF
|
||
mov [fs_type],32 ; Fat32
|
||
call free_hd_channel
|
||
mov [hd1_status],0 ; free
|
||
ret
|
||
|
||
fat16_partition:
|
||
xor eax,eax
|
||
mov [ROOT_CLUSTER],eax
|
||
|
||
popad
|
||
|
||
mov [fatRESERVED],0x0000FFF6
|
||
mov [fatBAD],0x0000FFF7
|
||
mov [fatEND],0x0000FFF8
|
||
mov [fatMASK],0x0000FFFF
|
||
mov [fs_type],16 ; Fat16
|
||
call free_hd_channel
|
||
mov [hd1_status],0 ; free
|
||
ret
|
||
|