mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-18 21:02:34 +03:00
437 lines
15 KiB
PHP
437 lines
15 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2011. 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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.partition dd ?
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rb 80
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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:
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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:
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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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.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 ? ; блок на глобальную 1 процедуру
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.ext2_temp_block dd ? ; блок для мелких процедур
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.ext2_save_inode dd ? ; inode на глобальную процедуру
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.ext2_temp_inode dd ? ; inode для мелких процедур
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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:
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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 ; просто выкидываем из стека
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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 зачем оно нам??
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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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push 0
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mov eax, [PARTITION_END]
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sub eax, [PARTITION_START]
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inc eax
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push eax
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push 0
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push [PARTITION_START]
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push ebp
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push ebp
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mov ebp, esp
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mov esi, 'old' ; special value: there is no DISK structure
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push 1 ; bootsector read successfully
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call fat_create_partition
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add esp, 4*7
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test eax, eax
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jz problem_fat_dec_count
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mov [fs_dependent_data_start.partition], eax
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mov al, [eax+FAT.fs_type]
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mov [fs_type], al
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popad
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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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