2009-09-17 13:55:38 +02:00
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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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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2009-10-12 16:39:59 +02:00
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$Revision$
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2009-09-17 13:55:38 +02:00
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;*************************************************************
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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 ; 0=none, 1=NTFS, 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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;***************************************************************************
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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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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 ; PARTITION2 ; PARTITION3 ; PARTITION4
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;==========================================================
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; fat16/32 +-- fat16/32 +-- fat16/32 +-- fat16/32 +--
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; extended --+ extended --+ extended --+ extended --+
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; 0 0 0 0
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; 0 0 0 0
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; Notes:
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; - extended partition need to be in second entry on table
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; - it will skip over removed partitions
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set_FAT32_variables:
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mov [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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mov edx,-1 ; flag for partition
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xor eax,eax ; read MBR
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xor ebp,ebp ; extended partition start
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new_partition:
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test ebp,ebp ; is there extended partition?
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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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cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition
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; jz next_partition
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jnz .next_primary_partition
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cmp dword [ebx+0x1be+0xc+16],0
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jnz next_primary_partition
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cmp dword [ebx+0x1be+0xc+16+16],0
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jnz next_primary_partition_1
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cmp dword [ebx+0x1be+0xc+16+16+16],0
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jnz next_primary_partition_2
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jmp next_partition
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.next_primary_partition:
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push eax
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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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pop eax
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jnz next_primary_partition ; no. skip over
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inc ecx
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cmp ecx,[fat32part] ; is it wanted partition?
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jnz next_primary_partition ; no
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mov edx, eax ; start sector
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add edx, [ebx+0x1be+8] ; add relative start
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push edx
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add edx, [ebx+0x1be+12] ; 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 dl, [ebx+0x1be+4]
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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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next_primary_partition:
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push eax
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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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pop eax
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jnz next_primary_partition_1 ; no. skip over
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inc ecx
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cmp ecx,[fat32part] ; is it wanted partition?
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jnz next_primary_partition_1 ; no
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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 dl, [ebx+0x1be+4+16]
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mov [fs_type], dl
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pop edx
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next_primary_partition_1:
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push eax
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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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pop eax
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jnz next_primary_partition_2 ; no. skip over
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inc ecx
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cmp ecx,[fat32part] ; is it wanted partition?
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jnz next_primary_partition_2 ; no
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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 dl, [ebx+0x1be+4+16+16]
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mov [fs_type], dl
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pop edx
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next_primary_partition_2:
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push eax
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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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pop eax
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jnz next_partition ; no. skip over
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inc ecx
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cmp ecx,[fat32part] ; is it wanted partition?
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jnz next_partition ; no
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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 dl, [ebx+0x1be+4+16+16+16]
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mov [fs_type], dl
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pop edx
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next_partition:
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push eax
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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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pop eax
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jnz next_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_partition ; yes. read it
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next_partition_1:
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push eax
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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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pop eax
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jnz next_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_partition ; yes. read it
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next_partition_2:
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push eax
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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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pop eax
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jnz next_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_partition ; yes. read it
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next_partition_3:
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push eax
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mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type
|
|
|
|
|
|
call scan_extended_types
|
|
|
|
|
|
pop eax
|
|
|
|
|
|
jnz end_partition_chain ; no. end chain
|
|
|
|
|
|
|
|
|
|
|
|
mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition
|
|
|
|
|
|
test eax,eax ; is there extended partition?
|
|
|
|
|
|
jnz new_partition ; yes. read it
|
|
|
|
|
|
|
|
|
|
|
|
end_partition_chain:
|
|
|
|
|
|
mov [partition_count],ecx
|
|
|
|
|
|
|
|
|
|
|
|
cmp edx,-1 ; found wanted partition?
|
|
|
|
|
|
jnz hd_and_partition_ok ; yes. install it
|
|
|
|
|
|
jmp problem_partition_or_fat
|
|
|
|
|
|
|
|
|
|
|
|
scan_partition_types:
|
|
|
|
|
|
push ecx
|
|
|
|
|
|
mov edi,partition_types
|
|
|
|
|
|
mov ecx,partition_types_end-partition_types
|
|
|
|
|
|
cld
|
|
|
|
|
|
repne scasb ; is partition type ok?
|
|
|
|
|
|
pop ecx
|
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
|
|
scan_extended_types:
|
|
|
|
|
|
push ecx
|
|
|
|
|
|
mov edi,extended_types
|
|
|
|
|
|
mov ecx,extended_types_end-extended_types
|
|
|
|
|
|
cld
|
|
|
|
|
|
repne scasb ; is it extended partition?
|
|
|
|
|
|
pop ecx
|
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
|
|
problem_fat_dec_count: ; bootsector is missing or another problem
|
|
|
|
|
|
dec [partition_count] ; remove it from partition_count
|
|
|
|
|
|
|
|
|
|
|
|
problem_partition_or_fat:
|
|
|
|
|
|
problem_hd:
|
|
|
|
|
|
popad
|
|
|
|
|
|
|
|
|
|
|
|
mov [fs_type],0
|
|
|
|
|
|
call free_hd_channel
|
|
|
|
|
|
mov [hd1_status],0 ; free
|
|
|
|
|
|
mov [problem_partition],1
|
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
|
|
hd_and_partition_ok:
|
|
|
|
|
|
mov eax,edx
|
|
|
|
|
|
mov [PARTITION_START],eax
|
|
|
|
|
|
mov edx, [PARTITION_END]
|
|
|
|
|
|
sub edx, eax
|
|
|
|
|
|
inc edx ; edx = length of partition
|
|
|
|
|
|
|
|
|
|
|
|
; mov [hd_setup],1
|
|
|
|
|
|
mov ebx,buffer
|
|
|
|
|
|
call hd_read ; read boot sector of partition
|
|
|
|
|
|
cmp [hd_error], 0
|
|
|
|
|
|
jz boot_read_ok
|
|
|
|
|
|
cmp [fs_type], 7
|
|
|
|
|
|
jnz problem_fat_dec_count
|
|
|
|
|
|
; NTFS duplicates bootsector:
|
|
|
|
|
|
; NT4/2k/XP+ saves bootsector copy in the end of disk
|
|
|
|
|
|
; NT 3.51 saves bootsector copy in the middle of disk
|
|
|
|
|
|
and [hd_error], 0
|
|
|
|
|
|
mov eax, [PARTITION_END]
|
|
|
|
|
|
call hd_read
|
|
|
|
|
|
cmp [hd_error], 0
|
|
|
|
|
|
jnz @f
|
|
|
|
|
|
call ntfs_test_bootsec
|
|
|
|
|
|
jnc boot_read_ok
|
|
|
|
|
|
@@:
|
|
|
|
|
|
and [hd_error], 0
|
|
|
|
|
|
mov eax, edx
|
|
|
|
|
|
shr eax, 1
|
|
|
|
|
|
add eax, [PARTITION_START]
|
|
|
|
|
|
call hd_read
|
|
|
|
|
|
cmp [hd_error], 0
|
|
|
|
|
|
jnz problem_fat_dec_count ; <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>졠...
|
|
|
|
|
|
boot_read_ok:
|
|
|
|
|
|
; mov [hd_setup], 0
|
|
|
|
|
|
; if we are running on NTFS, check bootsector
|
|
|
|
|
|
; cmp [fs_type], 7
|
|
|
|
|
|
; jz ntfs_setup
|
|
|
|
|
|
call ntfs_test_bootsec
|
|
|
|
|
|
jnc ntfs_setup
|
|
|
|
|
|
|
|
|
|
|
|
cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
|
|
|
|
|
|
jnz problem_fat_dec_count
|
|
|
|
|
|
|
|
|
|
|
|
movzx eax,word [ebx+0xe] ; sectors reserved
|
|
|
|
|
|
add eax,[PARTITION_START]
|
|
|
|
|
|
mov [FAT_START],eax ; fat_start = partition_start + reserved
|
|
|
|
|
|
|
|
|
|
|
|
movzx eax,byte [ebx+0xd] ; sectors per cluster
|
2009-10-07 11:59:35 +02:00
|
|
|
|
test eax,eax
|
|
|
|
|
|
jz problem_fat_dec_count
|
2009-09-17 13:55:38 +02:00
|
|
|
|
mov [SECTORS_PER_CLUSTER],eax
|
|
|
|
|
|
|
|
|
|
|
|
movzx ecx,word [ebx+0xb] ; bytes per sector
|
2009-10-07 11:59:35 +02:00
|
|
|
|
cmp ecx,0x200
|
|
|
|
|
|
jnz problem_fat_dec_count
|
2009-09-17 13:55:38 +02:00
|
|
|
|
mov [BYTES_PER_SECTOR],ecx
|
|
|
|
|
|
|
|
|
|
|
|
movzx eax,word [ebx+0x11] ; count of rootdir entries (=0 fat32)
|
|
|
|
|
|
mov edx,32
|
|
|
|
|
|
mul edx
|
|
|
|
|
|
dec ecx
|
|
|
|
|
|
add eax,ecx ; round up if not equal count
|
|
|
|
|
|
inc ecx ; bytes per sector
|
|
|
|
|
|
div ecx
|
|
|
|
|
|
mov [ROOT_SECTORS],eax ; count of rootdir sectors
|
|
|
|
|
|
|
|
|
|
|
|
movzx eax,word [ebx+0x16] ; sectors per fat <65536
|
|
|
|
|
|
test eax,eax
|
|
|
|
|
|
jnz fat16_fatsize
|
|
|
|
|
|
mov eax,[ebx+0x24] ; sectors per fat
|
|
|
|
|
|
fat16_fatsize:
|
|
|
|
|
|
mov [SECTORS_PER_FAT],eax
|
|
|
|
|
|
|
|
|
|
|
|
movzx eax,byte [ebx+0x10] ; number of fats
|
|
|
|
|
|
test eax,eax ; if 0 it's not fat partition
|
|
|
|
|
|
jz problem_fat_dec_count
|
|
|
|
|
|
mov [NUMBER_OF_FATS],eax
|
|
|
|
|
|
imul eax,[SECTORS_PER_FAT]
|
|
|
|
|
|
add eax,[FAT_START]
|
|
|
|
|
|
mov [ROOT_START],eax ; rootdir = fat_start + fat_size * fat_count
|
|
|
|
|
|
add eax,[ROOT_SECTORS] ; rootdir sectors should be 0 on fat32
|
|
|
|
|
|
mov [DATA_START],eax ; data area = rootdir + rootdir_size
|
|
|
|
|
|
|
|
|
|
|
|
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
|
