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kolibrios/kernel/trunk/fs/ntfs.inc
pathoswithin 201a5bf041 fs: prevalidation for root folder, code despaghettizing 
git-svn-id: svn://kolibrios.org@6845 a494cfbc-eb01-0410-851d-a64ba20cac60
2017-01-22 16:19:39 +00:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License. ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
; NTFS external functions
; in:
; ebx -> parameter structure of sysfunc 70
; ebp -> NTFS structure
; esi -> path string in UTF-8
; out:
; eax, ebx = return values for sysfunc 70
iglobal
align 4
ntfs_user_functions:
dd ntfs_free
dd (ntfs_user_functions_end - ntfs_user_functions - 4) / 4
dd ntfs_ReadFile
dd ntfs_ReadFolder
dd ntfs_CreateFile
dd ntfs_WriteFile
dd ntfs_SetFileEnd
dd ntfs_GetFileInfo
dd ntfs_SetFileInfo
dd 0
dd ntfs_Delete
dd ntfs_CreateFolder
ntfs_user_functions_end:
endg
; Basic concepts:
; File is a FileRecord in the $MFT.
; $MFT is a file, that consists of FileRecords and starts with FileRecord of itself.
; FileRecord (FILE) consists of a header and attributes.
; Attribute consists of a header and a body.
; Attribute's body can be inside (resident) or outside of FileRecord.
; File's data is a body of $Data (80h) attribute.
; FileRecords is a data of the $MFT file.
; Directory is a file, that consists of index nodes.
; Resident index node is always located in a body of $IndexRoot (90h) attribute.
; Body of $IndexAllocation (A0h) attribute is always non resident
; and consists of IndexRecords.
; IndexRecord (INDX) consists of a header and an index node.
; Index node consists of a header and indexes.
; Index consists of a header and a copy of indexed attribute's body.
; Directories index $Filename (30h) attribute of all existing files.
; $IndexRoot and $IndexAllocation attributes of a directory has a name — $I30.
; Offsets:
; record header
magic = 0
updateSequenceOffset = 4
updateSequenceSize = 6
; FileRecord header
reuseCounter = 16
hardLinkCounter = 12h
attributeOffset = 14h
recordFlags = 16h
recordRealSize = 18h
recordAllocatedSize = 1ch
baseRecordReference = 20h ; for auxiliary records
baseRecordReuse = 26h
newAttributeID = 28h
; attribute header
attributeType = 0
sizeWithHeader = 4
nonResidentFlag = 8
nameLength = 9
nameOffset = 10
attributeFlags = 12
attributeID = 14
; resident attribute header
sizeWithoutHeader = 10h
attributeOffset = 14h
indexedFlag = 16h
; non resident attribute header
firstVCN = 10h
lastVCN = 18h
dataRunsOffset = 20h
attributeAllocatedSize = 28h
attributeRealSize = 30h
initialDataSize = 38h
; $IndexRoot
indexedAttributesType = 0
collationRule = 4
indexRecordSize = 8
indexRecordSizeClus = 12 ; in sectors if less than one cluster
rootNode = 16
; IndexRecord header
recordVCN = 16
recordNode = 18h
; node header
indexOffset = 0
nodeRealSize = 4
nodeAllocatedSize = 8
nonLeafFlag = 12
; $Filename index
fileRecordReference = 0
fileReferenceReuse = 6
indexAllocatedSize = 8
indexRawSize = 10
indexFlags = 12
directoryRecordReference = 16
directoryReferenceReuse = 16h
fileCreated = 18h
fileModified = 20h
recordModified = 28h
fileAccessed = 30h
fileAllocatedSize = 38h
fileRealSize = 40h
fileFlags = 48h
fileNameLength = 50h
namespace = 51h
fileName = 52h
struct NTFS PARTITION
Lock MUTEX ; Currently operations with one partition
; can not be executed in parallel since the legacy code is not ready.
sectors_per_cluster dd ?
mft_cluster dd ? ; location
mftmirr_cluster dd ? ; location
frs_size dd ? ; in bytes
frs_buffer dd ? ; MFT fileRecord buffer
mft_retrieval_end dd ?
mftSize dd ? ; in sectors
cur_index_size dd ? ; in sectors
cur_index_buf dd ? ; index node buffer
secondIndexBuffer dd ?
BitmapBuffer dd ?
BitmapTotalSize dd ? ; bytes reserved
BitmapSize dd ? ; bytes readen
BitmapLocation dd ? ; starting sector
BitmapStart dd ? ; first byte after area, reserved for MFT
mftBitmapBuffer dd ? ; one cluster
mftBitmapSize dd ? ; bytes readen
mftBitmapLocation dd ? ; starting sector
attr_size dq ?
attr_offs dd ?
attr_list dd ?
attr_iBaseRecord dd ?
cur_attr dd ? ; attribute type
cur_iRecord dd ? ; number of fileRecord in MFT
cur_offs dd ? ; attribute VCN in sectors
cur_size dd ? ; max sectors to read
cur_buf dd ?
cur_read dd ? ; bytes readen
cur_tail dd ?
cur_subnode_size dd ?
LastRead dd ? ; last readen block of sectors
mftLastRead dd ?
rootLastRead dd ?
nodeLastRead dd ?
indexRoot dd ?
indexPointer dd ?
newRecord dd ?
fileDataStart dd ? ; starting cluster
fileDataSize dd ? ; in clusters
fileDataBuffer dd ?
fileRealSize dd ? ; in bytes
fragmentCount db ?
bCanContinue db ?
bFolder db ?
bWriteAttr db ? ; Warning: Don't forget to turn off!!!
mft_retrieval rb 512
align0 rb 1024-NTFS.align0
attrlist_buf rb 1024
attrlist_mft_buf rb 1024
bitmap_buf rb 1024
ends
ntfs_test_bootsec:
; in: ebx -> buffer, edx = size of partition
; out: CF=1 -> invalid
; 1. Name=='NTFS '
cmp dword [ebx+3], 'NTFS'
jnz .no
cmp dword [ebx+7], ' '
jnz .no
; 2. Number of bytes per sector is the same as for physical device
; (that is, 0x200 for hard disk)
cmp word [ebx+11], 0x200
jnz .no
; 3. Number of sectors per cluster must be power of 2
movzx eax, byte [ebx+13]
dec eax
js .no
test al, [ebx+13]
jnz .no
; 4. FAT parameters must be zero
cmp word [ebx+14], 0
jnz .no
cmp dword [ebx+16], 0
jnz .no
cmp byte [ebx+20], 0
jnz .no
cmp word [ebx+22], 0
jnz .no
cmp dword [ebx+32], 0
jnz .no
; 5. Number of sectors <= partition size
cmp dword [ebx+0x2C], 0
ja .no
cmp [ebx+0x28], edx
ja .no
; 6. $MFT and $MFTMirr clusters must be within partition
cmp dword [ebx+0x34], 0
ja .no
push edx
movzx eax, byte [ebx+13]
mul dword [ebx+0x30]
test edx, edx
pop edx
jnz .no
cmp eax, edx
ja .no
cmp dword [ebx+0x3C], 0
ja .no
push edx
movzx eax, byte [ebx+13]
mul dword [ebx+0x38]
test edx, edx
pop edx
jnz .no
cmp eax, edx
ja .no
; 7. Clusters per FRS must be either power of 2 or between -31 and -9
movsx eax, byte [ebx+0x40]
cmp al, -31
jl .no
cmp al, -9
jle @f
dec eax
js .no
test [ebx+0x40], al
jnz .no
@@: ; 8. Same for clusters per IndexAllocationBuffer
movsx eax, byte [ebx+0x44]
cmp al, -31
jl .no
cmp al, -9
jle @f
dec eax
js .no
test [ebx+0x44], al
jnz .no
@@: ; OK, this is correct NTFS bootsector
clc
ret
.no: ; No, this bootsector isn't NTFS
stc
ret
; Mount if it's a valid NTFS partition.
ntfs_create_partition:
; in:
; ebp -> PARTITION structure
; ebx -> boot sector
; ebx+512 -> buffer
; out:
; eax -> NTFS structure, 0 = not NTFS
cmp dword [esi+DISK.MediaInfo.SectorSize], 512
jnz .nope
mov edx, dword [ebp+PARTITION.Length]
cmp dword [esp+4], 0
jz .boot_read_ok
add ebx, 512
lea eax, [edx-1]
call fs_read32_sys
test eax, eax
jnz @f
call ntfs_test_bootsec
jnc .ntfs_setup
@@:
mov eax, edx
shr eax, 1
call fs_read32_sys
test eax, eax
jnz .nope
.boot_read_ok:
call ntfs_test_bootsec
jnc .ntfs_setup
.nope:
xor eax, eax
jmp .exit
.ntfs_setup: ; By given bootsector, initialize some NTFS variables
stdcall kernel_alloc, 1000h
test eax, eax
jz .exit
mov ecx, dword [ebp+PARTITION.FirstSector]
mov dword [eax+NTFS.FirstSector], ecx
mov ecx, dword [ebp+PARTITION.FirstSector+4]
mov dword [eax+NTFS.FirstSector+4], ecx
mov ecx, [ebp+PARTITION.Disk]
mov [eax+NTFS.Disk], ecx
mov [eax+NTFS.FSUserFunctions], ntfs_user_functions
mov [eax+NTFS.bWriteAttr], 0
push ebx ebp esi
mov ebp, eax
lea ecx, [ebp+NTFS.Lock]
call mutex_init
movzx eax, byte [ebx+13]
mov [ebp+NTFS.sectors_per_cluster], eax
mov eax, [ebx+0x28]
mov dword [ebp+NTFS.Length], eax
and dword [ebp+NTFS.Length+4], 0
mov eax, [ebx+0x30]
mov [ebp+NTFS.mft_cluster], eax
mov eax, [ebx+0x38]
mov [ebp+NTFS.mftmirr_cluster], eax
movsx eax, byte [ebx+0x40]
test eax, eax
js @f
mul [ebp+NTFS.sectors_per_cluster]
shl eax, 9
jmp .1
@@:
neg eax
mov ecx, eax
mov eax, 1
shl eax, cl
.1:
mov [ebp+NTFS.frs_size], eax
stdcall kernel_alloc, eax
test eax, eax
jz .fail_free
mov [ebp+NTFS.frs_buffer], eax
; read $MFT disposition
mov eax, [ebp+NTFS.mft_cluster]
mul [ebp+NTFS.sectors_per_cluster]
mov ecx, [ebp+NTFS.frs_size]
shr ecx, 9
mov ebx, [ebp+NTFS.frs_buffer]
call fs_read64_sys
test eax, eax
jnz .usemirr
cmp dword [ebx], 'FILE'
jnz .usemirr
call ntfs_restore_usa_frs
jnc .mftok
.usemirr:
mov eax, [ebp+NTFS.mftmirr_cluster]
mul [ebp+NTFS.sectors_per_cluster]
mov ecx, [ebp+NTFS.frs_size]
shr ecx, 9
mov ebx, [ebp+NTFS.frs_buffer]
call fs_read64_sys
test eax, eax
jnz .fail_free_frs
cmp dword [ebx], 'FILE'
jnz .fail_free_frs
call ntfs_restore_usa_frs
jc .fail_free_frs
.mftok: ; prepare $MFT retrieval information
; search for unnamed non-resident $DATA attribute
movzx eax, word [ebx+attributeOffset]
add eax, ebx
.scandata:
cmp dword [eax], -1
jz .fail_free_frs
cmp dword [eax], 0x80
jnz @f
cmp byte [eax+nameLength], 0
jz .founddata
@@:
add eax, [eax+sizeWithHeader]
jmp .scandata
.founddata:
cmp byte [eax+nonResidentFlag], 0
jz .fail_free_frs
movzx esi, word [eax+dataRunsOffset]
add esi, eax
mov edx, [eax+attributeAllocatedSize+4]
mov eax, [eax+attributeAllocatedSize]
shrd eax, edx, 9
mov [ebp+NTFS.mftSize], eax
sub esp, 10h
lea ecx, [ebp+NTFS.mft_retrieval]
xor edx, edx
.scanmcb: ; load descriptions of fragments
call ntfs_decode_mcb_entry
jnc .scanmcbend
mov eax, [esp] ; block length
mov [ecx], eax
add edx, [esp+8] ; block addr
mov [ecx+4], edx
add ecx, 8
jmp .scanmcb
.scanmcbend:
add esp, 10h
lea eax, [ebp+NTFS.attrlist_buf]
cmp eax, ecx
jc @f
mov eax, ecx
@@:
mov [ebp+NTFS.mft_retrieval_end], eax
; allocate index buffers
stdcall kernel_alloc, 2000h
test eax, eax
jz .fail_free_frs
mov [ebp+NTFS.cur_index_buf], eax
add eax, 1000h
mov [ebp+NTFS.secondIndexBuffer], eax
mov [ebp+NTFS.cur_index_size], 8
; reserve adress space for bitmap buffer and load some part of bitmap
mov eax, dword [ebp+NTFS.Length]
xor edx, edx
div [ebp+NTFS.sectors_per_cluster]
shr eax, 3
mov [ebp+NTFS.BitmapTotalSize], eax
add eax, 7FFFh
and eax, not 7FFFh
push eax
call alloc_kernel_space
test eax, eax
jz .failFreeIndex
mov [ebp+NTFS.BitmapBuffer], eax
mov [ebp+NTFS.cur_buf], eax
mov eax, [ebp+NTFS.BitmapTotalSize]
add eax, [ebp+NTFS.mft_cluster]
shr eax, 3+2 ; reserve 1/8 of partition for $MFT
shl eax, 2
mov [ebp+NTFS.BitmapStart], eax
shr eax, 15
inc eax
shl eax, 3
push eax
push eax
shl eax, 3
mov [ebp+NTFS.cur_size], eax
call alloc_pages
test eax, eax
pop ecx
jz .failFreeBitmap
add eax, 3
mov ebx, [ebp+NTFS.BitmapBuffer]
call commit_pages
mov [ebp+NTFS.cur_iRecord], 6
mov [ebp+NTFS.cur_attr], 0x80
mov [ebp+NTFS.cur_offs], 0
call ntfs_read_attr
jc .failFreeBitmap
mov eax, [ebp+NTFS.cur_read]
mov [ebp+NTFS.BitmapSize], eax
mov eax, [ebp+NTFS.LastRead]
mov [ebp+NTFS.BitmapLocation], eax
; read MFT $BITMAP attribute
mov eax, [ebp+NTFS.sectors_per_cluster]
mov [ebp+NTFS.cur_size], eax
shl eax, 9
stdcall kernel_alloc, eax
test eax, eax
jz .failFreeBitmap
mov [ebp+NTFS.mftBitmapBuffer], eax
mov [ebp+NTFS.cur_buf], eax
mov [ebp+NTFS.cur_iRecord], 0
mov [ebp+NTFS.cur_attr], 0xB0
mov [ebp+NTFS.cur_offs], 0
call ntfs_read_attr
mov eax, [ebp+NTFS.cur_read]
cmp eax, 4
jc .failFreeBitmapMFT
mov ecx, [ebp+NTFS.attr_offs]
cmp byte [ecx+nonResidentFlag], 1
jnz .failFreeBitmapMFT
mov [ebp+NTFS.mftBitmapSize], eax
mov eax, [ebp+NTFS.LastRead]
mov [ebp+NTFS.mftBitmapLocation], eax
mov eax, ebp
.pop_exit:
pop esi ebp ebx
.exit:
cmp dword [esp+4], 0
jz @f
sub ebx, 512
@@:
ret
.failFreeBitmapMFT:
stdcall kernel_free, [ebp+NTFS.mftBitmapBuffer]
.failFreeBitmap:
stdcall kernel_free, [ebp+NTFS.BitmapBuffer]
.failFreeIndex:
mov eax, [ebp+NTFS.cur_index_buf]
cmp eax, [ebp+NTFS.secondIndexBuffer]
jc @f
mov eax, [ebp+NTFS.secondIndexBuffer]
@@:
stdcall kernel_free, eax
.fail_free_frs:
stdcall kernel_free, [ebp+NTFS.frs_buffer]
.fail_free:
stdcall kernel_free, ebp
xor eax, eax
jmp .pop_exit
ntfs_free:
push ebx
mov ebx, eax
stdcall kernel_free, [ebx+NTFS.frs_buffer]
stdcall kernel_free, [ebx+NTFS.mftBitmapBuffer]
stdcall kernel_free, [ebx+NTFS.BitmapBuffer]
mov eax, [ebx+NTFS.cur_index_buf]
cmp eax, [ebx+NTFS.secondIndexBuffer]
jc @f
mov eax, [ebx+NTFS.secondIndexBuffer]
@@:
stdcall kernel_free, eax
stdcall kernel_free, ebx
pop ebx
ret
ntfs_lock:
lea ecx, [ebp+NTFS.Lock]
jmp mutex_lock
ntfs_unlock:
lea ecx, [ebp+NTFS.Lock]
jmp mutex_unlock
ntfs_read_attr:
; [ebp+NTFS.bWriteAttr]=1 -> write attribute
; in:
; [ebp+NTFS.cur_iRecord] = number of fileRecord
; [ebp+NTFS.cur_attr] = attribute type
; [ebp+NTFS.cur_offs] = attribute VCN in sectors
; [ebp+NTFS.cur_buf] -> buffer for data
; [ebp+NTFS.cur_size] = max sectors to read
; out:
; [ebp+NTFS.cur_read] = bytes readen
; CF=1 -> failed, eax = disk error code, eax=0 -> something with FS
xor eax, eax
pushad
and [ebp+NTFS.cur_read], 0
cmp [ebp+NTFS.cur_iRecord], 0
jnz .nomft
cmp [ebp+NTFS.cur_attr], 0x80
jnz .nomft
; precalculated part of $Mft $DATA
mov eax, [ebp+NTFS.cur_offs]
xor edx, edx
div [ebp+NTFS.sectors_per_cluster]
mov ebx, edx
mov [ebp+NTFS.fragmentCount], 0
; eax = VCN, ebx = offset in sectors from beginning of cluster
lea esi, [ebp+NTFS.mft_retrieval]
sub esi, 8
.mftscan:
add esi, 8
cmp esi, [ebp+NTFS.mft_retrieval_end]
jz .nomft
mov ecx, [esi+4]
sub eax, [esi]
jnc .mftscan
add ecx, eax
add ecx, [esi]
neg eax
mul [ebp+NTFS.sectors_per_cluster]
xchg eax, ecx
mul [ebp+NTFS.sectors_per_cluster]
sub ecx, ebx
add eax, ebx
mov ebx, [ebp+NTFS.cur_buf]
cmp ecx, [ebp+NTFS.cur_size]
jb @f
mov ecx, [ebp+NTFS.cur_size]
@@:
mov [ebp+NTFS.LastRead], eax
mov edi, ecx
call fs_read64_sys
test eax, eax
jnz .errret
sub [ebp+NTFS.cur_size], edi
add [ebp+NTFS.cur_offs], edi
shl edi, 9
add [ebp+NTFS.cur_read], edi
add [ebp+NTFS.cur_buf], edi
inc [ebp+NTFS.fragmentCount]
xor eax, eax
xor ebx, ebx
cmp [ebp+NTFS.cur_size], eax
jz @f
jmp .mftscan
.errret2_pop:
xor eax, eax
.errret_pop:
pop ecx
pop ecx
.errret:
mov [esp+28], eax
stc
@@:
popad
ret
.nomft:
; 1. Read file record.
; N.B. This will do recursive call of read_attr for $MFT::$Data.
mov eax, [ebp+NTFS.cur_iRecord]
and [ebp+NTFS.attr_list], 0
or dword [ebp+NTFS.attr_size+4], -1
or [ebp+NTFS.attr_iBaseRecord], -1
call ntfs_read_file_record
jc .errret
; 2. Find required attribute.
mov eax, [ebp+NTFS.frs_buffer]
; a) For auxiliary records, read base record.
; If base record is present, base iRecord may be 0 (for $Mft),
; but SequenceNumber is nonzero.
cmp word [eax+baseRecordReuse], 0
jz @f
mov eax, [eax+baseRecordReference]
.beginfindattr:
call ntfs_read_file_record
jc .errret
jmp @f
.newAttribute:
pushad
and [ebp+NTFS.cur_read], 0
@@:
; b) Scan for required attribute and for $ATTR_LIST
mov eax, [ebp+NTFS.frs_buffer]
movzx ecx, word [eax+attributeOffset]
add eax, ecx
mov ecx, [ebp+NTFS.cur_attr]
and [ebp+NTFS.attr_offs], 0
.scanattr:
cmp dword [eax], -1
jz .scandone
cmp dword [eax], ecx
jz .okattr
cmp [ebp+NTFS.attr_iBaseRecord], -1
jnz .scancont
cmp dword [eax], 0x20 ; $ATTR_LIST
jnz .scancont
mov [ebp+NTFS.attr_list], eax
jmp .scancont
.okattr:
; ignore named $DATA attributes (aka NTFS streams)
cmp ecx, 0x80
jnz @f
cmp byte [eax+nameLength], 0
jnz .scancont
@@:
mov [ebp+NTFS.attr_offs], eax
.scancont:
add eax, [eax+sizeWithHeader]
jmp .scanattr
.continue:
pushad
and [ebp+NTFS.cur_read], 0
.scandone:
; c) Check for required offset and length
mov ecx, [ebp+NTFS.attr_offs]
jecxz .noattr
push [ebp+NTFS.cur_size]
push [ebp+NTFS.cur_read]
call .doreadattr
pop edx
pop ecx
jc .ret
cmp [ebp+NTFS.bCanContinue], 0
jz .ret
sub edx, [ebp+NTFS.cur_read]
neg edx
shr edx, 9
sub ecx, edx
mov [ebp+NTFS.cur_size], ecx
jz .ret
.noattr:
cmp [ebp+NTFS.cur_attr], 0x20
jz @f
mov ecx, [ebp+NTFS.attr_list]
test ecx, ecx
jnz .lookattr
and dword [esp+28], 0
cmp [ebp+NTFS.attr_offs], 1 ; define CF
.ret:
popad
ret
.lookattr:
; required attribute or required offset was not found in base record;
; it may be present in auxiliary records;
; scan $ATTR_LIST
mov eax, [ebp+NTFS.attr_iBaseRecord]
cmp eax, -1
jz @f
call ntfs_read_file_record
jc .errret
or [ebp+NTFS.attr_iBaseRecord], -1
@@:
push [ebp+NTFS.cur_offs]
push [ebp+NTFS.cur_size]
push [ebp+NTFS.cur_read]
push [ebp+NTFS.cur_buf]
push dword [ebp+NTFS.attr_size]
push dword [ebp+NTFS.attr_size+4]
or dword [ebp+NTFS.attr_size+4], -1
and [ebp+NTFS.cur_offs], 0
mov [ebp+NTFS.cur_size], 2
and [ebp+NTFS.cur_read], 0
lea eax, [ebp+NTFS.attrlist_buf]
cmp [ebp+NTFS.cur_iRecord], 0
jnz @f
lea eax, [ebp+NTFS.attrlist_mft_buf]
@@:
mov [ebp+NTFS.cur_buf], eax
push eax
call .doreadattr
pop esi
mov edx, 1
pop dword [ebp+NTFS.attr_size+4]
pop dword [ebp+NTFS.attr_size]
mov ecx, [ebp+NTFS.cur_read]
pop [ebp+NTFS.cur_buf]
pop [ebp+NTFS.cur_read]
pop [ebp+NTFS.cur_size]
pop [ebp+NTFS.cur_offs]
jc .errret
or edi, -1
lea ecx, [ecx+esi-1Ah]
.scanliststart:
push ecx
mov eax, [ebp+NTFS.cur_attr]
.scanlist:
cmp esi, [esp]
jae .scanlistdone
cmp eax, [esi]
jz @f
.scanlistcont:
movzx ecx, word [esi+4]
add esi, ecx
jmp .scanlist
@@:
; ignore named $DATA attributes (aka NTFS streams)
cmp eax, 0x80
jnz @f
cmp byte [esi+6], 0
jnz .scanlistcont
@@:
push eax
mov eax, [esi+8]
test eax, eax
jnz .testf
cmp dword [ebp+NTFS.attr_size+4], -1
jnz .testfz
; if attribute is in auxiliary records, its size is defined only in first
mov eax, [esi+10h]
call ntfs_read_file_record
jc .errret_pop
mov eax, [ebp+NTFS.frs_buffer]
movzx ecx, word [eax+14h]
add eax, ecx
mov ecx, [ebp+NTFS.cur_attr]
@@:
cmp dword [eax], -1
jz .errret2_pop
cmp dword [eax], ecx
jz @f
.l1:
add eax, [eax+4]
jmp @b
@@:
cmp eax, 0x80
jnz @f
cmp byte [eax+9], 0
jnz .l1
@@:
cmp byte [eax+8], 0
jnz .sdnores
mov eax, [eax+10h]
mov dword [ebp+NTFS.attr_size], eax
and dword [ebp+NTFS.attr_size+4], 0
jmp .testfz
.sdnores:
mov ecx, [eax+30h]
mov dword [ebp+NTFS.attr_size], ecx
mov ecx, [eax+34h]
mov dword [ebp+NTFS.attr_size+4], ecx
.testfz:
xor eax, eax
.testf:
imul eax, [ebp+NTFS.sectors_per_cluster]
cmp eax, [ebp+NTFS.cur_offs]
pop eax
ja @f
mov edi, [esi+10h] ; keep previous iRecord
jmp .scanlistcont
@@:
pop ecx
.scanlistfound:
cmp edi, -1
jz .ret
mov eax, [ebp+NTFS.cur_iRecord]
mov [ebp+NTFS.attr_iBaseRecord], eax
mov eax, edi
jmp .beginfindattr
.scanlistdone:
pop ecx
sub ecx, ebp
sub ecx, NTFS.attrlist_buf-1Ah
cmp [ebp+NTFS.cur_iRecord], 0
jnz @f
sub ecx, NTFS.attrlist_mft_buf-NTFS.attrlist_buf
@@:
cmp ecx, 0x400
jnz .scanlistfound
inc edx
push esi edi
lea esi, [ebp+NTFS.attrlist_buf+0x200]
lea edi, [ebp+NTFS.attrlist_buf]
cmp [ebp+NTFS.cur_iRecord], 0
jnz @f
lea esi, [ebp+NTFS.attrlist_mft_buf+0x200]
lea edi, [ebp+NTFS.attrlist_mft_buf]
@@:
mov ecx, 0x200/4
rep movsd
mov eax, edi
pop edi esi
sub esi, 0x200
push [ebp+NTFS.cur_offs]
push [ebp+NTFS.cur_size]
push [ebp+NTFS.cur_read]
push [ebp+NTFS.cur_buf]
push dword [ebp+NTFS.attr_size]
push dword [ebp+NTFS.attr_size+4]
or dword [ebp+NTFS.attr_size+4], -1
mov [ebp+NTFS.cur_offs], edx
mov [ebp+NTFS.cur_size], 1
and [ebp+NTFS.cur_read], 0
mov [ebp+NTFS.cur_buf], eax
mov ecx, [ebp+NTFS.attr_list]
push esi edx edi
call .doreadattr
pop edi edx esi
mov ecx, [ebp+NTFS.cur_read]
pop dword [ebp+NTFS.attr_size+4]
pop dword [ebp+NTFS.attr_size]
pop [ebp+NTFS.cur_buf]
pop [ebp+NTFS.cur_read]
pop [ebp+NTFS.cur_size]
pop [ebp+NTFS.cur_offs]
jc .errret
lea ecx, [ecx+ebp+NTFS.attrlist_buf+0x200-0x1A]
cmp [ebp+NTFS.cur_iRecord], 0
jnz .scanliststart
add ecx, NTFS.attrlist_mft_buf-NTFS.attrlist_buf
jmp .scanliststart
.doreadattr:
mov [ebp+NTFS.bCanContinue], 0
cmp byte [ecx+nonResidentFlag], 0
jnz .nonresident
mov eax, [ecx+sizeWithoutHeader]
mov esi, eax
mov edx, [ebp+NTFS.cur_offs]
shr eax, 9
cmp eax, edx
jb .okret
shl edx, 9
sub esi, edx
movzx eax, word [ecx+attributeOffset]
add edx, eax
add edx, ecx ; edx -> data
mov eax, [ebp+NTFS.cur_size]
cmp eax, (0xFFFFFFFF shr 9)+1
jbe @f
mov eax, (0xFFFFFFFF shr 9)+1
@@:
shl eax, 9
cmp eax, esi
jbe @f
mov eax, esi
@@:
; eax = length, edx -> data
mov [ebp+NTFS.cur_read], eax
mov ecx, eax
mov eax, edx
mov ebx, [ebp+NTFS.cur_buf]
call memmove
and [ebp+NTFS.cur_size], 0 ; CF=0
ret
.nonresident:
; Not all auxiliary records contain correct FileSize info
mov eax, dword [ebp+NTFS.attr_size]
mov edx, dword [ebp+NTFS.attr_size+4]
cmp edx, -1
jnz @f
mov eax, [ecx+attributeRealSize]
mov edx, [ecx+attributeRealSize+4]
mov dword [ebp+NTFS.attr_size], eax
mov dword [ebp+NTFS.attr_size+4], edx
@@:
add eax, 0x1FF
adc edx, 0
shrd eax, edx, 9
sub eax, [ebp+NTFS.cur_offs]
ja @f
; return with nothing read
and [ebp+NTFS.cur_size], 0
.okret:
clc
ret
@@:
; reduce read length
and [ebp+NTFS.cur_tail], 0
cmp [ebp+NTFS.cur_size], eax
jb @f
mov [ebp+NTFS.cur_size], eax
mov eax, dword [ebp+NTFS.attr_size]
and eax, 0x1FF
mov [ebp+NTFS.cur_tail], eax
@@:
mov eax, [ebp+NTFS.cur_offs]
xor edx, edx
div [ebp+NTFS.sectors_per_cluster]
sub eax, [ecx+firstVCN]
jb .okret
mov ebx, edx
; eax = starting cluster, ebx = sector in the cluster
cmp [ebp+NTFS.cur_attr], 0x80
jnz .sys
cmp [ebp+NTFS.cur_iRecord], 0
jz .sys
push fs_read64_app
cmp [ebp+NTFS.bWriteAttr], 1
jnz @f
mov dword[esp], fs_write64_app
jmp @f
.sys:
push fs_read64_sys
@@:
sub esp, 10h
movzx esi, word [ecx+dataRunsOffset]
add esi, ecx
xor edi, edi
mov [ebp+NTFS.fragmentCount], 0
.readloop:
call ntfs_decode_mcb_entry
jnc .break
add edi, [esp+8]
sub eax, [esp]
jae .readloop
mov ecx, edi
add ecx, eax
add ecx, [esp]
neg eax
mul [ebp+NTFS.sectors_per_cluster]
xchg eax, ecx
mul [ebp+NTFS.sectors_per_cluster]
sub ecx, ebx
add eax, ebx
mov ebx, [ebp+NTFS.cur_buf]
cmp ecx, [ebp+NTFS.cur_size]
jb @f
mov ecx, [ebp+NTFS.cur_size]
@@:
mov [ebp+NTFS.LastRead], eax
push ecx
call dword[esp+14h]
pop ecx
test eax, eax
jnz .errread2
sub [ebp+NTFS.cur_size], ecx
add [ebp+NTFS.cur_offs], ecx
shl ecx, 9
add [ebp+NTFS.cur_read], ecx
add [ebp+NTFS.cur_buf], ecx
inc [ebp+NTFS.fragmentCount]
xor eax, eax
xor ebx, ebx
cmp [ebp+NTFS.cur_size], 0
jnz .readloop
add esp, 14h
mov eax, [ebp+NTFS.cur_tail]
test eax, eax
jz @f
sub eax, 0x200
add [ebp+NTFS.cur_read], eax
@@:
clc
ret
.errread2:
add esp, 14h
stc
ret
.break:
add esp, 14h ; CF=0
mov [ebp+NTFS.bCanContinue], 1
ret
ntfs_read_file_record:
; in: eax = iRecord
; out: [ebp+NTFS.frs_buffer] -> file record
; CF=1 -> failed, eax = disk error code, eax=0 -> something with FS
; Read attr $DATA of $Mft, starting from eax*[ebp+NTFS.frs_size]
push ecx edx
mov ecx, [ebp+NTFS.frs_size]
mul ecx
shrd eax, edx, 9
shr edx, 9
jnz .errret
push [ebp+NTFS.attr_iBaseRecord]
push [ebp+NTFS.attr_offs]
push [ebp+NTFS.attr_list]
push dword [ebp+NTFS.attr_size+4]
push dword [ebp+NTFS.attr_size]
push [ebp+NTFS.cur_iRecord]
push [ebp+NTFS.cur_attr]
push [ebp+NTFS.cur_offs]
push [ebp+NTFS.cur_size]
push [ebp+NTFS.cur_buf]
push [ebp+NTFS.cur_read]
mov [ebp+NTFS.cur_attr], 0x80 ; $DATA
and [ebp+NTFS.cur_iRecord], 0 ; $Mft
mov [ebp+NTFS.cur_offs], eax
shr ecx, 9
mov [ebp+NTFS.cur_size], ecx
mov eax, [ebp+NTFS.frs_buffer]
mov [ebp+NTFS.cur_buf], eax
call ntfs_read_attr
mov edx, [ebp+NTFS.cur_read]
pop [ebp+NTFS.cur_read]
pop [ebp+NTFS.cur_buf]
pop [ebp+NTFS.cur_size]
pop [ebp+NTFS.cur_offs]
pop [ebp+NTFS.cur_attr]
pop [ebp+NTFS.cur_iRecord]
pop dword [ebp+NTFS.attr_size]
pop dword [ebp+NTFS.attr_size+4]
pop [ebp+NTFS.attr_list]
pop [ebp+NTFS.attr_offs]
pop [ebp+NTFS.attr_iBaseRecord]
jc .ret
cmp edx, [ebp+NTFS.frs_size]
jnz .errret
mov eax, [ebp+NTFS.LastRead]
mov [ebp+NTFS.mftLastRead], eax
mov eax, [ebp+NTFS.frs_buffer]
cmp dword [eax], 'FILE'
jnz .errret
push ebx
mov ebx, eax
call ntfs_restore_usa_frs
pop ebx
jc .errret
.ret:
pop edx ecx
ret
.errret:
pop edx ecx
xor eax, eax
stc
ret
ntfs_restore_usa_frs:
mov eax, [ebp+NTFS.frs_size]
ntfs_restore_usa:
; in:
; ebx -> record
; eax = size in bytes
pushad
shr eax, 9
mov ecx, eax
inc eax
cmp [ebx+updateSequenceSize], ax
jnz .err
movzx eax, word [ebx+updateSequenceOffset]
lea esi, [eax+ebx]
lodsw
mov edx, eax
lea edi, [ebx+0x1FE]
@@:
cmp [edi], dx
jnz .err
lodsw
stosw
add edi, 0x1FE
loop @b
popad
clc
ret
.err:
popad
stc
ret
ntfs_decode_mcb_entry:
; in:
; esi -> MCB entry
; esp -> buffer (16 bytes)
; out:
; esi -> next MCB entry
; esp -> data run size
; esp+8 -> cluster (delta)
; CF=0 -> MCB end
push eax ecx edi
lea edi, [esp+16]
xor eax, eax
lodsb
test al, al
jz .end
mov ecx, eax
and ecx, 0xF
cmp ecx, 8
ja .end
push ecx
rep movsb
pop ecx
sub ecx, 8
neg ecx
cmp byte [esi-1], 80h
jae .end
push eax
xor eax, eax
rep stosb
pop ecx
shr ecx, 4
cmp ecx, 8
ja .end
push ecx
rep movsb
pop ecx
sub ecx, 8
neg ecx
cmp byte [esi-1], 80h
cmc
sbb eax, eax
rep stosb
stc
.end:
pop edi ecx eax
ret
ntfs_find_lfn:
; in: esi -> path string in UTF-8
; out:
; [ebp+NTFS.cur_iRecord] = target fileRecord
; eax -> target index in the node
; [ebp+NTFS.LastRead] = target node location
; [ebp+NTFS.indexPointer] -> index, that points the target subnode
; [ebp+NTFS.nodeLastRead] = branch node location
; [ebp+NTFS.indexRoot] -> attribute
; [ebp+NTFS.rootLastRead] = directory fileRecord location
; [ebp+NTFS.cur_size] = index record size in sectors
; [ebp+NTFS.cur_subnode_size] = index record size in clusters or sectors
; CF=1 -> file not found, eax=0 -> error
mov [ebp+NTFS.cur_iRecord], 5 ; start from root directory
.doit2:
mov [ebp+NTFS.cur_attr], 0x90 ; $INDEX_ROOT
and [ebp+NTFS.cur_offs], 0
mov eax, [ebp+NTFS.cur_index_size]
mov [ebp+NTFS.cur_size], eax
mov eax, [ebp+NTFS.cur_index_buf]
mov [ebp+NTFS.cur_buf], eax
call ntfs_read_attr
mov eax, 0
jc .ret
cmp [ebp+NTFS.cur_read], 0x20
jc .ret
push esi
pushad
mov esi, [ebp+NTFS.cur_index_buf]
mov eax, [esi+indexRecordSize]
shr eax, 9
cmp [ebp+NTFS.cur_index_size], eax
jc .realloc
mov [ebp+NTFS.cur_size], eax
mov al, [esi+indexRecordSizeClus]
mov [ebp+NTFS.cur_subnode_size], eax
add esi, rootNode
mov eax, [esi+nodeRealSize]
add eax, rootNode
cmp [ebp+NTFS.cur_read], eax
jc .err
mov eax, [ebp+NTFS.mftLastRead]
mov [ebp+NTFS.rootLastRead], eax
mov eax, [ebp+NTFS.attr_offs]
mov [ebp+NTFS.indexRoot], eax
.scanloop: ; esi -> current index node
add esi, [esi+indexOffset]
.scanloopint:
push esi
test byte [esi+indexFlags], 2
jnz .subnode
movzx ecx, byte [esi+fileNameLength]
lea edi, [esi+fileName]
mov esi, [esp+8]
@@:
call utf8to16
cmp ax, '/'
jz .subnode
call utf16toUpper
push eax
mov ax, [edi]
call utf16toUpper
cmp [esp], ax
pop eax
jc .subnode
jnz .scanloopcont
add edi, 2
loop @b
call utf8to16
cmp ax, '/'
jz .found
test ax, ax
jz .found
.scanloopcont:
pop esi
movzx eax, word [esi+indexAllocatedSize]
add esi, eax
jmp .scanloopint
.realloc:
mov edi, eax
mov eax, [esi+indexRecordSize]
shl eax, 1
stdcall kernel_alloc, eax
test eax, eax
jz .err
mov edx, [ebp+NTFS.cur_index_buf]
cmp edx, [ebp+NTFS.secondIndexBuffer]
jc @f
mov edx, [ebp+NTFS.secondIndexBuffer]
@@:
mov [ebp+NTFS.cur_index_buf], eax
add eax, [esi+indexRecordSize]
mov [ebp+NTFS.secondIndexBuffer], eax
mov [ebp+NTFS.cur_index_size], edi
stdcall kernel_free, edx
popad
pop eax
jmp .doit2
.notfound:
mov [esp+28], esi
.err:
popad
stc
.ret2:
pop esi
.ret:
ret
.subnode:
pop esi
test byte [esi+indexFlags], 1
jz .notfound
mov eax, [ebp+NTFS.LastRead]
mov [ebp+NTFS.nodeLastRead], eax
mov [ebp+NTFS.indexPointer], esi
movzx eax, word [esi+indexAllocatedSize]
mov eax, [esi+eax-8]
mov edx, [ebp+NTFS.cur_size]
push edx
cmp edx, [ebp+NTFS.cur_subnode_size]
jz @f
mul [ebp+NTFS.sectors_per_cluster]
@@:
mov esi, [ebp+NTFS.cur_index_buf]
xchg [ebp+NTFS.secondIndexBuffer], esi
mov [ebp+NTFS.cur_index_buf], esi
mov [ebp+NTFS.cur_buf], esi
mov [ebp+NTFS.cur_attr], 0xA0 ; $INDEX_ALLOCATION
mov [ebp+NTFS.cur_offs], eax
call ntfs_read_attr.newAttribute
pop eax
mov [ebp+NTFS.cur_size], eax
shl eax, 9
cmp [ebp+NTFS.cur_read], eax
jnz .err
cmp dword [esi], 'INDX'
jnz .err
mov ebx, esi
call ntfs_restore_usa
jc .err
add esi, recordNode
jmp .scanloop
.found:
mov [esp+8], esi
pop eax
mov [esp+28], eax
mov eax, [eax+fileRecordReference]
mov [ebp+NTFS.cur_iRecord], eax
popad
cmp byte [esi-1], 0
jz .ret2
pop eax
jmp .doit2
;----------------------------------------------------------------
ntfs_ReadFile:
call ntfs_lock
call ntfs_find_lfn
jc ntfsNotFound
mov [ebp+NTFS.cur_attr], 0x80 ; $DATA
and [ebp+NTFS.cur_offs], 0
and [ebp+NTFS.cur_size], 0
call ntfs_read_attr
jc ntfsDenied
xor eax, eax
push eax
cmp dword [ebx+8], 0x200
jnc .eof
mov ecx, [ebx+12]
mov edx, [ebx+16]
mov eax, [ebx+4]
test eax, 0x1FF
jz .alignedstart
push edx
mov edx, [ebx+8]
shrd eax, edx, 9
pop edx
mov [ebp+NTFS.cur_offs], eax
mov [ebp+NTFS.cur_size], 1
lea eax, [ebp+NTFS.bitmap_buf]
mov [ebp+NTFS.cur_buf], eax
call ntfs_read_attr.continue
mov eax, [ebx+4]
and eax, 0x1FF
lea esi, [ebp+NTFS.bitmap_buf+eax]
sub eax, [ebp+NTFS.cur_read]
jae .eof
neg eax
push ecx
cmp ecx, eax
jb @f
mov ecx, eax
@@:
mov [esp+4], ecx
mov edi, edx
rep movsb
mov edx, edi
pop ecx
sub ecx, [esp]
jz .retok
cmp [ebp+NTFS.cur_read], 0x200
jnz .eof
.alignedstart:
mov eax, [ebx+4]
push edx
mov edx, [ebx+8]
add eax, 511
adc edx, 0
shrd eax, edx, 9
pop edx
mov [ebp+NTFS.cur_offs], eax
mov [ebp+NTFS.cur_buf], edx
mov eax, ecx
shr eax, 9
mov [ebp+NTFS.cur_size], eax
add eax, [ebp+NTFS.cur_offs]
push eax
call ntfs_read_attr.continue
pop [ebp+NTFS.cur_offs]
mov eax, [ebp+NTFS.cur_read]
add [esp], eax
mov eax, ecx
and eax, not 0x1FF
cmp [ebp+NTFS.cur_read], eax
jnz .eof
and ecx, 0x1FF
jz .retok
add edx, [ebp+NTFS.cur_read]
mov [ebp+NTFS.cur_size], 1
lea eax, [ebp+NTFS.bitmap_buf]
mov [ebp+NTFS.cur_buf], eax
call ntfs_read_attr.continue
cmp [ebp+NTFS.cur_read], ecx
jb @f
mov [ebp+NTFS.cur_read], ecx
@@:
xchg ecx, [ebp+NTFS.cur_read]
push ecx
mov edi, edx
lea esi, [ebp+NTFS.bitmap_buf]
add [esp+4], ecx
rep movsb
pop ecx
cmp ecx, [ebp+NTFS.cur_read]
jnz .eof
.retok:
pushd 0
.ret:
call ntfs_unlock
pop eax ebx
ret
.eof:
push ERROR_END_OF_FILE
jmp .ret
;----------------------------------------------------------------
ntfs_ReadFolder:
call ntfs_lock
mov [ebp+NTFS.cur_iRecord], 5 ; root directory
cmp byte [esi], 0
jz @f
call ntfs_find_lfn
jc ntfsNotFound
@@:
mov [ebp+NTFS.cur_attr], 0x10 ; $STANDARD_INFORMATION
and [ebp+NTFS.cur_offs], 0
mov [ebp+NTFS.cur_size], 1
lea eax, [ebp+NTFS.bitmap_buf]
mov [ebp+NTFS.cur_buf], eax
call ntfs_read_attr
jc ntfsFail
mov [ebp+NTFS.cur_attr], 0x90 ; $INDEX_ROOT
.doit:
mov eax, [ebp+NTFS.cur_index_size]
mov [ebp+NTFS.cur_size], eax
mov eax, [ebp+NTFS.cur_index_buf]
mov [ebp+NTFS.cur_buf], eax
call ntfs_read_attr.newAttribute
jc ntfsFail
cmp [ebp+NTFS.cur_read], 0x20
jc ntfsFail
mov esi, [ebp+NTFS.cur_index_buf]
mov eax, [esi+indexRecordSize]
shr eax, 9
cmp [ebp+NTFS.cur_index_size], eax
jc .realloc
mov [ebp+NTFS.cur_subnode_size], eax
add esi, rootNode
mov eax, [esi+nodeRealSize]
add eax, rootNode
cmp [ebp+NTFS.cur_read], eax
jc ntfsFail
mov edi, [ebx+16]
mov ecx, [ebx+12]
pushd [ebx]
pushd [ebx+8] ; read ANSI/UNICODE name
push edi
mov edx, esp
mov ebx, [ebx+4]
; init header
xor eax, eax
mov [edi+8], eax
mov [edi+4], eax
inc eax
mov [edi], eax ; version
add edi, 32
; edi -> BDFE, esi -> current index data, ebx = first wanted block,
; ecx = number of blocks to read
; edx -> parameters block: dd <output>, dd <flags>
cmp [ebp+NTFS.cur_iRecord], 5
jz .skip_specials
; dot and dotdot entries
push esi
xor esi, esi
call .add_special_entry
inc esi
call .add_special_entry
pop esi
.skip_specials:
; at first, dump index root
add esi, [esi+indexOffset]
.dump_root:
test byte [esi+indexFlags], 2
jnz .dump_root_done
call .add_entry
movzx eax, word [esi+indexAllocatedSize]
add esi, eax
jmp .dump_root
.realloc:
mov edi, eax
mov eax, [esi+indexRecordSize]
shl eax, 1
stdcall kernel_alloc, eax
test eax, eax
jz ntfsFail
mov edx, [ebp+NTFS.cur_index_buf]
cmp edx, [ebp+NTFS.secondIndexBuffer]
jc @f
mov edx, [ebp+NTFS.secondIndexBuffer]
@@:
mov [ebp+NTFS.cur_index_buf], eax
add eax, [esi+indexRecordSize]
mov [ebp+NTFS.secondIndexBuffer], eax
mov [ebp+NTFS.cur_index_size], edi
stdcall kernel_free, edx
jmp .doit
.dump_root_done:
; now dump all subnodes
push ecx edi
lea edi, [ebp+NTFS.bitmap_buf]
mov [ebp+NTFS.cur_buf], edi
mov ecx, 0x400/4
xor eax, eax
rep stosd
mov [ebp+NTFS.cur_attr], 0xB0 ; $BITMAP
and [ebp+NTFS.cur_offs], 0
mov [ebp+NTFS.cur_size], 2
call ntfs_read_attr.newAttribute
pop edi ecx
push 0 ; save offset in $BITMAP attribute
and [ebp+NTFS.cur_offs], 0
.dumploop:
mov [ebp+NTFS.cur_attr], 0xA0
mov eax, [ebp+NTFS.cur_subnode_size]
mov [ebp+NTFS.cur_size], eax
mov esi, [ebp+NTFS.cur_index_buf]
mov [ebp+NTFS.cur_buf], esi
mov eax, [ebp+NTFS.cur_offs]
push eax
imul eax, [ebp+NTFS.cur_subnode_size]
mov [ebp+NTFS.cur_offs], eax
call ntfs_read_attr.newAttribute
pop [ebp+NTFS.cur_offs]
mov eax, [ebp+NTFS.cur_subnode_size]
shl eax, 9
cmp [ebp+NTFS.cur_read], eax
jnz .done
push eax
mov eax, [ebp+NTFS.cur_offs]
and eax, 0x400*8-1
bt dword [ebp+NTFS.bitmap_buf], eax
pop eax
jnc .dump_subnode_done
cmp dword [esi], 'INDX'
jnz .dump_subnode_done
push ebx
mov ebx, esi
call ntfs_restore_usa
pop ebx
jc .dump_subnode_done
add esi, recordNode
add esi, [esi+indexOffset]
.dump_subnode:
test byte [esi+indexFlags], 2
jnz .dump_subnode_done
call .add_entry
movzx eax, word [esi+indexAllocatedSize]
add esi, eax
jmp .dump_subnode
.dump_subnode_done:
inc [ebp+NTFS.cur_offs]
test [ebp+NTFS.cur_offs], 0x400*8-1
jnz .dumploop
mov [ebp+NTFS.cur_attr], 0xB0
push ecx edi
lea edi, [ebp+NTFS.bitmap_buf]
mov [ebp+NTFS.cur_buf], edi
mov ecx, 0x400/4
xor eax, eax
rep stosd
pop edi ecx
pop eax
push [ebp+NTFS.cur_offs]
inc eax
mov [ebp+NTFS.cur_offs], eax
mov [ebp+NTFS.cur_size], 2
push eax
call ntfs_read_attr.newAttribute
pop eax
pop [ebp+NTFS.cur_offs]
push eax
jmp .dumploop
.done:
pop eax
pop eax
mov ebx, [eax+4]
pop eax
pop eax
test eax, eax
jz .ret
xor eax, eax
dec ecx
js @f
mov al, ERROR_END_OF_FILE
@@:
push eax
call ntfs_unlock
pop eax
ret
.add_special_entry:
mov eax, [edx]
inc dword [eax+8] ; new file found
dec ebx
jns .ret
dec ecx
js .ret
inc dword [eax+4] ; new file block copied
mov eax, [edx+4]
mov [edi+4], eax
mov eax, 0x10
stosd
scasd
push ebx ecx edx
mov eax, dword [ebp+NTFS.bitmap_buf]
mov edx, dword [ebp+NTFS.bitmap_buf+4]
call ntfs_datetime_to_bdfe
mov eax, dword [ebp+NTFS.bitmap_buf+0x18]
mov edx, dword [ebp+NTFS.bitmap_buf+0x1C]
call ntfs_datetime_to_bdfe
mov eax, dword [ebp+NTFS.bitmap_buf+8]
mov edx, dword [ebp+NTFS.bitmap_buf+0xC]
call ntfs_datetime_to_bdfe
pop edx ecx ebx
xor eax, eax
stosd
stosd
mov al, '.'
push edi ecx
lea ecx, [esi+1]
cmp dword[edi-36], 2
jz .utf16sp
rep stosb
mov byte [edi], 0
pop ecx edi
cmp dword[edi-36], 3
jz @f
add edi, 264
ret
.utf16sp:
rep stosw
mov word [edi], 0
pop ecx edi
@@:
add edi, 520
.ret:
ret
.add_entry:
; do not return DOS 8.3 names
cmp byte [esi+namespace], 2
jz .ret
; do not return system files
cmp dword[esi+fileRecordReference], 16
jb .ret
cmp byte [esi+fileNameLength], 0
jz .ret
mov eax, [edx]
inc dword [eax+8] ; new file found
dec ebx
jns .ret
dec ecx
js .ret
inc dword [eax+4] ; new file block copied
mov eax, [edx+4] ; flags
call ntfs_direntry_to_bdfe
push ecx esi edi
movzx ecx, byte [esi+fileNameLength]
add esi, fileName
cmp dword[edi-36], 2
jz .utf16
cmp dword[edi-36], 3
jz .utf8
@@:
lodsw
call uni2ansi_char
stosb
loop @b
mov byte [edi], 0
pop edi esi ecx
add edi, 264
ret
.utf8:
push ecx
mov cx, 519
@@:
lodsw
call UTF16to8
js @f
dec dword[esp]
jnz @b
@@:
mov byte [edi], 0
pop edi
@@:
pop edi esi ecx
add edi, 520
ret
.utf16:
rep movsw
mov word [edi], 0
jmp @b
ntfs_direntry_to_bdfe:
mov [edi+4], eax ; ANSI/UNICODE name
mov eax, [esi+fileFlags]
test eax, 0x10000000
jz @f
and eax, not 0x10000000
or al, 0x10
@@:
stosd
scasd
push ebx ecx edx
mov eax, [esi+fileCreated]
mov edx, [esi+fileCreated+4]
call ntfs_datetime_to_bdfe
mov eax, [esi+fileAccessed]
mov edx, [esi+fileAccessed+4]
call ntfs_datetime_to_bdfe
mov eax, [esi+fileModified]
mov edx, [esi+fileModified+4]
call ntfs_datetime_to_bdfe
pop edx ecx ebx
mov eax, [esi+fileRealSize]
stosd
mov eax, [esi+fileRealSize+4]
stosd
ret
ntfs_datetime_to_bdfe:
; in: edx:eax = seconds since 01.01.1601 x10000000
; edi -> data block
; out: edi = edi+8
sub eax, 3365781504
sbb edx, 29389701
mov ecx, 10000000
cmp edx, ecx
jc @f
xor edx, edx
@@:
div ecx
jmp fsTime2bdfe
;----------------------------------------------------------------
ntfs_GetFileInfo:
call ntfs_lock
mov edi, [ebx+16]
cmp byte [esi], 0
jz .volume
call ntfs_find_lfn
jnc .found
test eax, eax
jz ntfsFail
jmp ntfsNotFound
.found:
mov esi, eax
xor eax, eax
call ntfs_direntry_to_bdfe
.end:
call ntfs_unlock
xor eax, eax
ret
.volume:
mov byte [edi], 8
mov eax, [ebx+8]
mov [edi+4], eax
mov eax, dword [ebp+NTFS.Length]
mov edx, dword [ebp+NTFS.Length+4]
shld edx, eax, 9
shl eax, 9
mov [edi+36], edx
mov [edi+32], eax
add edi, 40
mov [ebp+NTFS.cur_buf], edi
mov [ebp+NTFS.cur_iRecord], 3
mov [ebp+NTFS.cur_attr], 0x60
mov [ebp+NTFS.cur_offs], 0
mov [ebp+NTFS.cur_size], 1
call ntfs_read_attr
jc ntfsFail
mov ecx, [ebp+NTFS.cur_read]
mov [edi+ecx], ax
cmp [ebx+8], eax
jnz .end
mov esi, edi
shr ecx, 1
jz .end
@@:
lodsw
call uni2ansi_char
stosb
loop @b
mov byte [edi], 0
jmp .end
;----------------------------------------------------------------
ntfs_CreateFolder:
mov [ebp+NTFS.bFolder], 1
jmp @f
ntfs_CreateFile:
mov [ebp+NTFS.bFolder], 0
@@: ; 1. Search file
call ntfs_lock
call ntfs_find_lfn
jc .notFound
; found, rewrite
cmp [ebp+NTFS.cur_iRecord], 16
jc ntfsDenied
cmp [ebp+NTFS.bFolder], 1
jz .folder
test byte [eax+fileFlags], 1
jnz ntfsDenied
cmp [ebp+NTFS.fragmentCount], 1
jnz ntfsUnsupported ; record fragmented
; edit directory node
mov edi, [ebp+NTFS.cur_index_buf]
cmp dword [edi], 'INDX'
jz @f
mov esi, [ebp+NTFS.frs_buffer]
mov ecx, [esi+recordRealSize]
shr ecx, 2
rep movsd
mov esi, [ebp+NTFS.attr_offs]
mov cl, [esi+attributeOffset]
sub esi, [ebp+NTFS.frs_buffer]
add eax, ecx
add eax, esi
@@:
mov edi, eax
mov eax, [ebx+12]
mov [edi+fileRealSize], eax
mov dword [edi+fileRealSize+4], 0
push ebx eax
call ntfsGetTime
mov [edi+fileModified], eax
mov [edi+fileModified+4], edx
mov [edi+recordModified], eax
mov [edi+recordModified+4], edx
mov [edi+fileAccessed], eax
mov [edi+fileAccessed+4], edx
pop edx ebx
mov eax, [ebp+NTFS.LastRead]
mov [ebp+NTFS.nodeLastRead], eax
mov [ebp+NTFS.cur_attr], 0x80
mov [ebp+NTFS.cur_offs], 0
mov [ebp+NTFS.cur_size], 0
call ntfs_read_attr
jc ntfsFail
mov esi, edi
mov edi, [ebp+NTFS.frs_buffer]
cmp word [edi+baseRecordReuse], 0
jnz ntfsUnsupported ; auxiliary record
mov al, [edi+attributeOffset]
add edi, eax
mov al, [edi+attributeOffset]
add edi, eax
mov ecx, 6
add esi, fileModified
add edi, 8
rep movsd
mov eax, edx
xor edx, edx
mov ecx, [ebp+NTFS.attr_offs]
cmp word [ecx+attributeFlags], 0
jnz ntfsUnsupported
push ebx
cmp byte [ecx+nonResidentFlag], 0
jz @f
cmp [ecx+attributeRealSize+4], edx
jnz @f
cmp [ecx+attributeRealSize], eax
jz ntfs_WriteFile.writeNode
@@:
jmp ntfs_WriteFile.resizeAttribute
.folder:
bt dword [eax+fileFlags], 28
jnc ntfsDenied
push 0
jmp ntfsOut
.notFound: ; create
test eax, eax
jz ntfsFail
cmp [ebp+NTFS.fragmentCount], 1
jnz ntfsUnsupported ; record fragmented
; 2. Prepare directory record
mov edi, esi
mov edx, eax
xor ecx, ecx
@@: ; count characters
call utf8to16
cmp ax, '/'
jz ntfsNotFound ; path folder not found
inc ecx
test ax, ax
jnz @b
dec ecx
push ecx ; name length in chars
push edi
shl ecx, 1
add ecx, fileName+7
and ecx, not 7
mov edi, [ebp+NTFS.cur_index_buf]
mov eax, [ebx+12]
mov [ebp+NTFS.fileRealSize], eax
mov eax, [ebx+16]
mov [ebp+NTFS.fileDataBuffer], eax
push ecx ; index length
mov eax, edx
mov edx, ecx
cmp dword [edi], 'INDX'
jz .indexRecord
mov esi, [ebp+NTFS.frs_buffer] ; indexRoot
mov ecx, [esi+recordRealSize]
add edx, ecx
cmp [esi+recordAllocatedSize], edx
jc .growTree
mov [esi+recordRealSize], edx
shr ecx, 2
rep movsd
mov edi, [ebp+NTFS.indexRoot]
sub edi, [ebp+NTFS.frs_buffer]
add edi, [ebp+NTFS.cur_index_buf]
mov esi, [esp]
add [edi+sizeWithHeader], esi
add [edi+sizeWithoutHeader], esi
mov cl, [edi+attributeOffset]
add edi, ecx
add [edi+rootNode+nodeRealSize], esi
add [edi+rootNode+nodeAllocatedSize], esi
sub eax, [ebp+NTFS.cur_index_buf]
add eax, edi
mov edi, [ebp+NTFS.cur_index_buf]
jmp .common
.growTree: ; create indexRecord
mov edi, [ebp+NTFS.cur_index_buf]
mov ecx, 10
xor eax, eax
rep stosd
mov esi, [ebp+NTFS.indexRoot]
mov al, [esi+attributeOffset]
add esi, eax
rdtsc
stosw
mov eax, [esi+indexRecordSize]
cmp eax, [ebp+NTFS.frs_size]
jc .errorPop3
shr eax, 9
inc eax
mov edi, [ebp+NTFS.cur_index_buf]
mov dword[edi], 'INDX'
mov byte [edi+updateSequenceOffset], 28h
mov [edi+updateSequenceSize], al
add edi, recordNode
shl eax, 1
add eax, 28h-recordNode+7
and eax, not 7
mov [edi+indexOffset], eax
mov ecx, [esi+indexRecordSize]
sub ecx, recordNode
mov [edi+nodeAllocatedSize], ecx
add esi, rootNode
push esi
mov ecx, [esi+nodeRealSize]
sub ecx, [esi+indexOffset]
add eax, ecx
mov [edi+nodeRealSize], eax
mov eax, [esi+nonLeafFlag]
mov [edi+nonLeafFlag], eax
shr ecx, 2
add esi, [esi+indexOffset]
add edi, [edi+indexOffset]
rep movsd ; copy root indexes
; clear root node
mov cl, 10
mov edi, [esp]
xor eax, eax
rep stosd
pop edi
mov byte [edi+indexOffset], 16
mov byte [edi+nodeRealSize], 28h
mov byte [edi+nodeAllocatedSize], 28h
mov byte [edi+nonLeafFlag], 1
mov byte [edi+16+indexAllocatedSize], 18h
mov byte [edi+16+indexFlags], 3
mov esi, [ebp+NTFS.indexRoot]
add edi, 28h
mov eax, edi
sub eax, esi
mov word [esi+sizeWithoutHeader], 38h
xchg [esi+sizeWithHeader], eax
add esi, eax
mov [ebp+NTFS.attr_offs], edi
cmp byte [esi], 0xA0
jnz @f
cmp dword [esi+attributeAllocatedSize], 0
jz @f
mov eax, [ebp+NTFS.frs_buffer]
mov ecx, eax
add ecx, [eax+recordRealSize]
sub ecx, esi
shr ecx, 2
rep movsd
sub edi, eax
mov [eax+recordRealSize], edi
call .ntfsNodeAlloc
jc ntfsErrorPop3
mov eax, [ebp+NTFS.newRecord]
mov edi, [ebp+NTFS.cur_index_buf]
mov [edi+recordVCN], eax
mov edi, [ebp+NTFS.attr_offs]
mov [edi-8], eax
jmp .refresh
@@:
mov cl, 32
xor eax, eax
rep stosd
mov eax, [ebp+NTFS.cur_subnode_size]
cmp eax, [ebp+NTFS.cur_size]
jnz @f
cmp [ebp+NTFS.sectors_per_cluster], 1
jz @f
mov al, 1
@@:
mov [ebp+NTFS.fileDataSize], eax
mov edi, [ebp+NTFS.BitmapStart]
call ntfsSpaceAlloc
movi eax, ERROR_DISK_FULL
jc ntfsErrorPop3
; create $IndexAllocation
mov edi, [ebp+NTFS.attr_offs]
mov byte [edi+attributeType], 0xA0
mov byte [edi+nonResidentFlag], 1
mov byte [edi+nameLength], 4
mov byte [edi+nameOffset], 40h
mov byte [edi+dataRunsOffset], 48h
mov byte [edi+sizeWithHeader], 50h
mov eax, [ebp+NTFS.fileDataSize]
dec eax
mov [edi+lastVCN], eax
inc eax
mul [ebp+NTFS.sectors_per_cluster]
shl eax, 9
mov [edi+attributeAllocatedSize], eax
mov [edi+attributeRealSize], eax
mov [edi+initialDataSize], eax
mov dword[edi+40h], 490024h ; unicode $I30
mov dword[edi+40h+4], 300033h
push edi
mov esi, edi
add edi, 48h
call createMcbEntry
mov esi, [ebp+NTFS.frs_buffer]
pop edi
mov al, [esi+newAttributeID]
mov [edi+attributeID], al
add edi, 50h
inc eax
; create $Bitmap
mov [edi+attributeID], al
inc eax
mov [esi+newAttributeID], al
mov byte [edi+attributeType], 0xB0
mov byte [edi+nameLength], 4
mov byte [edi+nameOffset], 18h
mov byte [edi+attributeOffset], 20h
mov byte [edi+sizeWithoutHeader], 8
mov byte [edi+sizeWithHeader], 28h
mov dword[edi+18h], 490024h ; unicode $I30
mov dword[edi+18h+4], 300033h
mov byte [edi+20h], 1
mov dword[edi+28h], -1
add edi, 30h
sub edi, esi
mov [esi+recordRealSize], edi
mov eax, [ebp+NTFS.fileDataStart]
mul [ebp+NTFS.sectors_per_cluster]
mov edx, eax
jmp @f
.refresh:
mov [ebp+NTFS.cur_size], 0
call ntfs_read_attr.continue
movi eax, ERROR_FS_FAIL
jc ntfsErrorPop3
mov edx, [ebp+NTFS.LastRead]
@@:
mov ebx, [ebp+NTFS.cur_index_buf]
call writeRecord
mov ebx, [ebp+NTFS.frs_buffer]
mov edx, [ebp+NTFS.rootLastRead]
call writeRecord
mov esi, [esp+4]
call ntfs_find_lfn.doit2
test eax, eax
jz .errorPop3
mov edi, [ebp+NTFS.cur_index_buf]
mov edx, [esp]
.indexRecord:
add edi, recordNode
add edx, [edi+nodeRealSize]
cmp [edi+nodeAllocatedSize], edx
jc .arborizeTree
mov [edi+nodeRealSize], edx
jmp .common
.errorPop3:
add esp, 12
jmp ntfsUnsupported
.ntfsNodeAlloc:
; in: [ebp+NTFS.attr_offs] -> $IndexAllocation
; out:
; [ebp+NTFS.newRecord] = node VCN
; [ebp+NTFS.cur_offs]
; CF=1 -> eax = error code
mov esi, [ebp+NTFS.attr_offs]
add esi, [esi+sizeWithHeader]
cmp byte [esi], 0xB0
jnz .ret
movzx ecx, word [esi+sizeWithoutHeader]
shr ecx, 2
movzx edi, byte [esi+attributeOffset]
add edi, esi
mov edx, edi
or eax, -1
repz scasd
jnz @f
cmp [edi], eax
jnz .ret
; extend folder $Bitmap
add word [esi+sizeWithHeader], 8
add word [esi+sizeWithoutHeader], 8
mov esi, [ebp+NTFS.frs_buffer]
mov eax, [esi+recordRealSize]
add eax, 8
cmp [esi+recordAllocatedSize], eax
jc .ret
mov [esi+recordRealSize], eax
xor eax, eax
stosd
mov [edi], eax
mov [edi+8], eax
dec eax
mov [edi+4], eax
@@:
sub edi, 4
mov eax, [edi]
not eax
bsf eax, eax
bts [edi], eax
sub edi, edx
shl edi, 3
add eax, edi
mul [ebp+NTFS.cur_subnode_size]
mov [ebp+NTFS.newRecord], eax
mov ecx, [ebp+NTFS.cur_size]
cmp ecx, [ebp+NTFS.cur_subnode_size]
jz @f
mul [ebp+NTFS.sectors_per_cluster]
@@:
mov [ebp+NTFS.cur_offs], eax
add eax, ecx
shl eax, 9
mov esi, [ebp+NTFS.attr_offs]
cmp [esi+attributeAllocatedSize], eax
jnc @f
xor edx, edx
jmp resizeAttribute
.ret:
movi eax, ERROR_UNSUPPORTED_FS
stc
@@:
ret
.arborizeTree: ; find median index
mov ecx, [edi+nodeRealSize]
sub ecx, [edi+indexOffset]
shr ecx, 1
add edi, [edi+indexOffset]
xor eax, eax
@@:
add edi, eax
mov ax, [edi+indexAllocatedSize]
sub ecx, eax
jnc @b
add eax, 8
mov esi, [ebp+NTFS.secondIndexBuffer]
cmp dword [esi], 'INDX'
jz @f
; move index to the root node
mov esi, [ebp+NTFS.frs_buffer]
mov ecx, eax
add ecx, 8
add ecx, [esi+recordRealSize]
cmp [esi+recordAllocatedSize], ecx
jc .growTree
push edi eax
call .ntfsNodeAlloc
jc ntfsErrorPop5
pop eax
mov edi, [ebp+NTFS.indexRoot]
add [ebp+NTFS.attr_offs], eax
add [edi+sizeWithHeader], eax
add [edi+sizeWithoutHeader], eax
movzx ecx, byte [edi+attributeOffset]
add ecx, edi
add [ecx+rootNode+nodeRealSize], eax
add [ecx+rootNode+nodeAllocatedSize], eax
add ecx, [ebp+NTFS.indexPointer]
sub ecx, [ebp+NTFS.secondIndexBuffer]
mov esi, [ebp+NTFS.frs_buffer]
add [esi+recordRealSize], eax
add esi, [esi+recordRealSize]
mov edi, esi
sub esi, eax
neg ecx
add ecx, esi
shr ecx, 2
sub esi, 4
sub edi, 4
std
rep movsd ; make space
mov [edi], ecx
mov edi, esi
add edi, 4
mov esi, [esp]
add word [esi+indexAllocatedSize], 8
mov byte [esi+indexFlags], 1
mov ecx, eax
sub ecx, 8
shr ecx, 2
cld
rep movsd ; insert index
mov eax, [ebp+NTFS.newRecord]
stosd
jmp .splitNode
.growBranch: ; move node and replace it with empty one
mov esi, [ebp+NTFS.cur_index_buf]
mov edi, [ebp+NTFS.secondIndexBuffer]
mov eax, [esi+recordVCN]
mov [edi+recordVCN], eax
add edi, recordNode
mov eax, [edi+indexOffset]
add eax, 18h
mov [edi+nodeRealSize], eax
add edi, [edi+indexOffset]
mov ecx, 6
xor eax, eax
mov [ebp+NTFS.indexPointer], edi
push edi
rep stosd
pop edi
mov eax, [ebp+NTFS.newRecord]
mov byte [edi+indexAllocatedSize], 18h
mov byte [edi+indexFlags], 3
mov [edi+16], eax
mov [esi+recordVCN], eax
mov eax, [ebp+NTFS.LastRead]
mov [ebp+NTFS.nodeLastRead], eax
push [ebp+NTFS.cur_size]
mov [ebp+NTFS.cur_size], 0
call ntfs_read_attr.continue
pop [ebp+NTFS.cur_size]
movi eax, ERROR_FS_FAIL
jc ntfsErrorPop5
pop eax edi
@@: ; move index to the branch node
push edi eax
call .ntfsNodeAlloc
jc ntfsErrorPop5
mov eax, [esp]
mov esi, [ebp+NTFS.secondIndexBuffer]
add esi, recordNode
mov ecx, [esi+nodeRealSize]
add eax, ecx
cmp [esi+nodeAllocatedSize], eax
jc .growBranch
mov [esi+nodeRealSize], eax
lea edi, [esi+eax-4]
add esi, ecx
mov ecx, esi
sub ecx, [ebp+NTFS.indexPointer]
shr ecx, 2
sub esi, 4
std
rep movsd ; make space
mov [edi], ecx
pop ecx
sub ecx, 8
shr ecx, 2
mov edi, esi
add edi, 4
mov esi, [esp]
add word [esi+indexAllocatedSize], 8
mov byte [esi+indexFlags], 1
cld
rep movsd ; insert index
mov eax, [ebp+NTFS.newRecord]
stosd
mov ebx, [ebp+NTFS.secondIndexBuffer]
mov edx, [ebp+NTFS.nodeLastRead]
push esi
call writeRecord
pop esi
.splitNode:
mov edi, [ebp+NTFS.cur_index_buf]
mov eax, edi
add eax, recordNode
add eax, [edi+recordNode+nodeRealSize]
sub eax, esi
push eax
mov ecx, [edi+recordNode+indexOffset]
add eax, ecx
add ecx, recordNode
shr ecx, 2
push esi
mov esi, edi
mov edi, [ebp+NTFS.secondIndexBuffer]
rep movsd
pop esi
pop ecx
shr ecx, 2
rep movsd
mov edi, [ebp+NTFS.secondIndexBuffer]
mov [edi+recordNode+nodeRealSize], eax
pop edi
mov cl, 4
xor eax, eax
mov esi, edi
rep stosd
mov byte [esi+indexAllocatedSize], 16
mov byte [esi+indexFlags], 2
mov esi, [ebp+NTFS.cur_index_buf]
mov eax, [ebp+NTFS.newRecord]
mov [esi+recordVCN], eax
add esi, recordNode
sub edi, esi
mov [esi+nodeRealSize], edi
mov ebx, [ebp+NTFS.secondIndexBuffer]
mov edx, [ebp+NTFS.LastRead]
call writeRecord
jmp .refresh
.common:
add edi, edx
sub edi, 4
mov esi, edi
sub esi, [esp]
mov ecx, esi
sub ecx, eax ; eax = pointer in the record
shr ecx, 2
inc ecx
std
rep movsd ; move forward, make space
mov ecx, [esp]
shr ecx, 2
xor eax, eax
rep stosd
cld
add edi, 4
call ntfsGetTime
mov [edi+fileCreated], eax
mov [edi+fileCreated+4], edx
mov [edi+fileModified], eax
mov [edi+fileModified+4], edx
mov [edi+recordModified], eax
mov [edi+recordModified+4], edx
mov [edi+fileAccessed], eax
mov [edi+fileAccessed+4], edx
pop ecx
pop esi
mov [edi+indexAllocatedSize], cx ; fill index with data
mov eax, [esp]
shl eax, 1
add eax, 42h
mov [edi+indexRawSize], ax
mov eax, [ebp+NTFS.cur_iRecord]
mov [edi+directoryRecordReference], eax
mov eax, [ebp+NTFS.frs_buffer]
mov eax, [eax+reuseCounter]
mov [edi+directoryReferenceReuse], ax
mov eax, [ebp+NTFS.frs_size]
shr eax, 8
add ecx, 30h+48h+8+18h+8
add ecx, eax
mov eax, [ebp+NTFS.fileRealSize]
add ecx, eax
mov [edi+fileRealSize], eax
cmp [ebp+NTFS.frs_size], ecx
jc @f
xor eax, eax
@@:
mov ecx, [ebp+NTFS.sectors_per_cluster]
shl ecx, 9
add eax, ecx
dec eax
xor edx, edx
div ecx
mov [ebp+NTFS.fileDataSize], eax
mul ecx
mov [edi+fileAllocatedSize], eax
pop ecx
mov [ebp+NTFS.indexPointer], edi
mov [edi+fileNameLength], cl
add edi, fileName
@@: ; record filename
call utf8to16
stosw
loop @b
mov eax, [ebp+NTFS.LastRead]
mov [ebp+NTFS.nodeLastRead], eax
cmp [ebp+NTFS.bFolder], 0
jz @f
mov edi, [ebp+NTFS.indexPointer]
bts dword [edi+fileFlags], 28
jmp .mftBitmap
@@: ; 3. File data
cmp [ebp+NTFS.fileDataSize], 0
jz .mftBitmap
mov edi, [ebp+NTFS.BitmapStart]
call ntfsSpaceAlloc
jc ntfsDiskFull
mov eax, [ebp+NTFS.fileDataStart]
mul [ebp+NTFS.sectors_per_cluster]
mov ecx, [ebp+NTFS.fileRealSize]
add ecx, 511
shr ecx, 9
mov ebx, [ebp+NTFS.fileDataBuffer]
call fs_write64_app
test eax, eax
jnz ntfsDevice
; 4. MFT record
.mftBitmap: ; search for free record
mov edi, [ebp+NTFS.mftBitmapBuffer]
mov ecx, [ebp+NTFS.mftBitmapSize]
mov al, -1
add edi, 3
sub ecx, 3
repz scasb
dec edi
movzx eax, byte [edi]
not al
bsf ecx, eax
jz .extendBitmapMFT ; no free records
bts [edi], ecx
; get record location
sub edi, [ebp+NTFS.mftBitmapBuffer]
shl edi, 3
add edi, ecx
mov [ebp+NTFS.newRecord], edi
mov eax, [ebp+NTFS.frs_size]
shr eax, 9
mul edi
mov [ebp+NTFS.cur_iRecord], 0
mov [ebp+NTFS.cur_attr], 0x80
mov [ebp+NTFS.cur_offs], eax
push eax
mov [ebp+NTFS.cur_size], 0
mov eax, [ebp+NTFS.frs_buffer]
mov [ebp+NTFS.cur_buf], eax
call ntfs_read_attr
pop eax
jc ntfsFail
cmp eax, [ebp+NTFS.mftSize]
jnc .extendMFT
jmp .mftRecord
.extendBitmapMFT:
mov eax, [ebp+NTFS.sectors_per_cluster]
mov [ebp+NTFS.cur_offs], eax
shl eax, 9
cmp [ebp+NTFS.mftBitmapSize], eax
jnc ntfsUnsupported
mov [ebp+NTFS.cur_iRecord], 0
mov [ebp+NTFS.cur_attr], 0xB0
mov [ebp+NTFS.cur_size], 0
call ntfs_read_attr
jc ntfsFail
mov eax, [ebp+NTFS.mft_cluster]
mul [ebp+NTFS.sectors_per_cluster]
cmp eax, [ebp+NTFS.LastRead]
jnz ntfsUnsupported ; auxiliary record
mov edi, [ebp+NTFS.mftBitmapBuffer]
mov ecx, [ebp+NTFS.mftBitmapSize]
add edi, ecx
mov eax, ecx
mov edx, [ebp+NTFS.attr_offs]
add ecx, 8
mov [edx+attributeRealSize], ecx
mov [edx+initialDataSize], ecx
shl eax, 3
mov [ebp+NTFS.newRecord], eax
mov dword [edi], 1
mov dword [edi+4], 0
mov [ebp+NTFS.cur_attr], 0x80
mov [ebp+NTFS.cur_offs], 0
call ntfs_read_attr.newAttribute
jc ntfsFail
mov [ebp+NTFS.mftBitmapSize], ecx
.extendMFT:
mov eax, [ebp+NTFS.mft_cluster]
mul [ebp+NTFS.sectors_per_cluster]
cmp eax, [ebp+NTFS.LastRead]
jnz ntfsUnsupported ; auxiliary record
mov ecx, [ebp+NTFS.attr_offs]
mov eax, [ecx+attributeRealSize]
mov edx, [ecx+attributeRealSize+4]
xor ax, ax
add eax, 10000h
adc edx, 0
push [ebp+NTFS.fileDataStart]
push [ebp+NTFS.fileDataSize]
call resizeAttribute
jc ntfsErrorPop2
mov ebx, [ebp+NTFS.frs_buffer]
mov edx, [ebp+NTFS.LastRead]
call writeRecord ; $MFT
mov eax, [ebp+NTFS.mftmirr_cluster]
mul [ebp+NTFS.sectors_per_cluster]
mov ecx, [ebp+NTFS.frs_size]
shr ecx, 9
call fs_write64_sys ; $MFTMirr
; update $MFT retrieval information
mov edi, [ebp+NTFS.mft_retrieval_end]
mov eax, [edi-4]
add eax, [edi-8]
mov edx, [ebp+NTFS.fileDataSize]
cmp eax, [ebp+NTFS.fileDataStart]
jnz .newFragment
add [edi-8], edx
jmp @f
.newFragment:
lea eax, [ebp+NTFS.attrlist_buf]
cmp eax, edi
jz @f
mov [edi], edx
mov eax, [ebp+NTFS.fileDataStart]
mov [edi+4], eax
add [ebp+NTFS.mft_retrieval_end], 8
@@:
mov eax, [ebp+NTFS.fileDataSize]
mul [ebp+NTFS.sectors_per_cluster]
add [ebp+NTFS.mftSize], eax
call ntfsSpaceClean
pop [ebp+NTFS.fileDataSize]
pop [ebp+NTFS.fileDataStart]
.mftRecord:
mov ecx, [ebp+NTFS.frs_size]
shr ecx, 2
mov edi, [ebp+NTFS.frs_buffer]
xor eax, eax
rep stosd
mov esi, [ebp+NTFS.indexPointer]
mov eax, [ebp+NTFS.newRecord]
mov [esi+fileRecordReference], eax
rdtsc
mov [esi+fileReferenceReuse], ax
mov edi, [ebp+NTFS.frs_buffer]
; record header
mov [edi+reuseCounter], ax
mov [edi+2ah], ax
mov eax, [ebp+NTFS.frs_size]
mov [edi+recordAllocatedSize], eax
shr eax, 9
inc eax
mov [edi+updateSequenceSize], al
shl eax, 1
add eax, 2ah+7
and eax, not 7
mov dword[edi], 'FILE'
mov byte [edi+updateSequenceOffset], 2ah
mov byte [edi+hardLinkCounter], 1
mov byte [edi+newAttributeID], 3
mov [edi+attributeOffset], al
add edi, eax
; $StandardInformation
mov byte [edi+attributeType], 10h
mov byte [edi+sizeWithHeader], 48h
mov byte [edi+sizeWithoutHeader], 30h
mov byte [edi+attributeOffset], 18h
mov cl, 8
add esi, fileCreated
add edi, 18h
rep movsd
add edi, 16
mov esi, [ebp+NTFS.indexPointer]
; $FileName
mov byte [edi+attributeType], 30h
mov byte [edi+attributeID], 1
mov byte [edi+attributeOffset], 18h
mov byte [edi+indexedFlag], 1
mov cx, [esi+indexRawSize]
mov [edi+sizeWithoutHeader], ecx
mov cx, [esi+indexAllocatedSize]
add ecx, 8
mov [edi+sizeWithHeader], ecx
add edi, 18h
add esi, 16
sub ecx, 18h
shr ecx, 2
rep movsd
mov byte [edi+sizeWithHeader], 50h
mov byte [edi+attributeID], 2
cmp [ebp+NTFS.bFolder], 1
jz .indexRoot
; $Data
mov byte [edi+attributeType], 80h
mov eax, [ebp+NTFS.fileDataSize]
test eax, eax
jz .resident
mov esi, [ebp+NTFS.indexPointer]
dec eax
mov [edi+lastVCN], eax
mov byte [edi+nonResidentFlag], 1
mov byte [edi+dataRunsOffset], 40h
mov eax, [esi+fileAllocatedSize]
mov [edi+attributeAllocatedSize], eax
mov eax, [esi+fileRealSize]
mov [edi+attributeRealSize], eax
mov [edi+initialDataSize], eax
push edi
mov esi, edi
add edi, 40h
call createMcbEntry
inc edi
jmp @f
.resident:
mov ecx, [ebp+NTFS.fileRealSize]
mov [edi+sizeWithoutHeader], ecx
mov byte [edi+attributeOffset], 18h
push edi
mov esi, [ebp+NTFS.fileDataBuffer]
add edi, 18h
rep movsb
@@:
mov eax, edi
pop edi
sub eax, edi
add eax, 7
and eax, not 7
mov [edi+sizeWithHeader], eax
add edi, eax
mov al, 1
jmp .end
.indexRoot:
mov byte [edi+attributeType], 90h
mov byte [edi+nameLength], 4
mov byte [edi+nameOffset], 18h
mov byte [edi+sizeWithoutHeader], 30h
mov byte [edi+attributeOffset], 20h
mov dword[edi+18h], 490024h ; unicode $I30
mov dword[edi+18h+4], 300033h
mov byte [edi+20h+indexedAttributesType], 30h
mov byte [edi+20h+collationRule], 1
mov eax, [ebp+NTFS.sectors_per_cluster]
mov dl, 1
shl eax, 8
@@:
shl eax, 1
shl edx, 1
cmp eax, [ebp+NTFS.frs_size]
jc @b
shr edx, 1
mov [edi+20h+indexRecordSize], eax
mov [edi+20h+indexRecordSizeClus], dl
mov byte [edi+30h+indexOffset], 16
mov byte [edi+30h+nodeRealSize], 32
mov byte [edi+30h+nodeAllocatedSize], 32
mov byte [edi+40h+indexAllocatedSize], 16
mov byte [edi+40h+indexFlags], 2
add edi, 50h
mov al, 3
.end:
mov ebx, [ebp+NTFS.frs_buffer]
mov dword [edi], -1
mov dword [edi+4], 0
add edi, 8
sub edi, ebx
mov [ebx+recordFlags], al
mov [ebx+recordRealSize], edi
mov edx, [ebp+NTFS.LastRead]
call writeRecord
; write MFT bitmap
mov eax, [ebp+NTFS.newRecord]
shr eax, 3+9
mov ebx, eax
shl ebx, 9
add eax, [ebp+NTFS.mftBitmapLocation]
add ebx, [ebp+NTFS.mftBitmapBuffer]
mov ecx, 1
xor edx, edx
call fs_write64_sys
; 5. Write directory node
mov ebx, [ebp+NTFS.cur_index_buf]
mov edx, [ebp+NTFS.nodeLastRead]
call writeRecord
mov ebx, [ebp+NTFS.fileRealSize]
ntfsDone:
mov esi, [ebp+PARTITION.Disk]
call disk_sync
call ntfs_unlock
xor eax, eax
ret
writeRecord:
; make updateSequence and write to disk
; in:
; ebx -> record
; edx = partition sector
mov esi, ebx
mov edi, ebx
movzx ecx, word [esi+updateSequenceOffset]
add edi, ecx
mov ax, [edi]
inc ax
stosw
mov cx, [esi+updateSequenceSize]
dec ecx
push ecx
@@:
add esi, 510
movsw
mov [esi-2], ax
loop @b
mov eax, edx
xor edx, edx
pop ecx
jmp fs_write64_sys
createMcbEntry:
; in:
; [ebp+NTFS.fileDataStart] = position value
; [ebp+NTFS.fileDataSize] = size value
; edi -> destination
; esi -> attribute header
mov eax, [ebp+NTFS.fileDataStart]
xor edx, edx
shl eax, 1
jnc @f
not eax
@@:
inc edx
shr eax, 8
jnz @b
mov eax, [ebp+NTFS.fileDataSize]
shl eax, 1
xor ecx, ecx
@@:
inc ecx
shr eax, 8
jnz @b
lea eax, [edi+edx+1]
add eax, ecx
sub eax, esi
sub eax, [esi+sizeWithHeader]
jc @f
add word [esi+sizeWithHeader], 8 ; extend attribute
mov esi, [ebp+NTFS.frs_buffer]
mov eax, [esi+recordRealSize]
add eax, 8
cmp [esi+recordAllocatedSize], eax
jc .end ; no space in the record
mov [esi+recordRealSize], eax
push ecx edi
add esi, eax
mov ecx, esi
sub ecx, edi
sub ecx, 8
shr ecx, 2
mov edi, esi
sub edi, 4
sub esi, 12
std
rep movsd
cld
pop edi ecx
@@:
mov eax, edx
shl eax, 4
add eax, ecx
stosb
lea esi, [ebp+NTFS.fileDataSize]
rep movsb
lea esi, [ebp+NTFS.fileDataStart]
mov ecx, edx
rep movsb
mov [edi], cl
.end:
ret
resizeAttribute:
; in:
; [ebp+NTFS.frs_buffer] -> file record
; [ebp+NTFS.attr_offs] -> attribute
; edx:eax = new size
; out:
; [ebp+NTFS.fileDataSize] = clusters added (positive)
; [ebp+NTFS.fileDataStart] = added block
; CF=1 -> eax = error code
mov esi, [ebp+NTFS.attr_offs]
mov dword [ebp+NTFS.attr_size], eax
mov dword [ebp+NTFS.attr_size+4], edx
cmp byte [esi+nonResidentFlag], 0
jz .resident
mov ecx, [ebp+NTFS.sectors_per_cluster]
shl ecx, 9
mov [esi+attributeRealSize], eax
mov [esi+attributeRealSize+4], edx
mov [esi+initialDataSize], eax
mov [esi+initialDataSize+4], edx
sub eax, 1
sbb edx, 0
jc .makeResident
div ecx
mov edi, eax
inc eax
mul ecx
mov [esi+attributeAllocatedSize], eax
mov [esi+attributeAllocatedSize+4], edx
mov ecx, [esi+lastVCN]
mov [esi+lastVCN], edi
movzx eax, byte [esi+dataRunsOffset]
sub edi, ecx
mov [ebp+NTFS.fileDataSize], edi
jz .done
jc .shrinkAttribute
; extend attribute
xor edi, edi
add esi, eax
push edi edi edi edi
@@:
mov edx, eax
mov eax, esi
add edi, [esp+8]
call ntfs_decode_mcb_entry
jc @b
mov [esp+4], edx
mov [esp+12], edi
add edi, [esp]
push edi
shr edi, 5
shl edi, 2
push eax
cmp edi, [ebp+NTFS.BitmapStart]
jnc @f
cmp [ebp+NTFS.cur_iRecord], 0
jz @f
mov edi, [ebp+NTFS.BitmapStart]
@@:
call ntfsSpaceAlloc
jc .err1
mov eax, [ebp+NTFS.fileDataStart]
pop edi
pop edx
cmp edx, eax
jnz .newEntry
pop edx
pop edi
pop [ebp+NTFS.fileDataStart]
mov [esp], eax
push [ebp+NTFS.fileDataSize]
add [ebp+NTFS.fileDataSize], edx
jmp @f
.newEntry:
add esp, 12
pop edx
push eax
push [ebp+NTFS.fileDataSize]
sub eax, edx
mov [ebp+NTFS.fileDataStart], eax
@@:
mov esi, [ebp+NTFS.attr_offs]
call createMcbEntry
pop [ebp+NTFS.fileDataSize]
pop [ebp+NTFS.fileDataStart]
movi eax, ERROR_UNSUPPORTED_FS
.done:
ret
.err1:
add esp, 24
stc
.err2:
movi eax, ERROR_DISK_FULL
ret
.err3:
movi eax, ERROR_FS_FAIL
add esp, 20
stc
ret
.shrinkAttribute:
add ecx, edi
inc ecx
add esi, eax
xor edi, edi
sub esp, 20
@@:
mov [esp+16], esi
call ntfs_decode_mcb_entry
jnc .err3
add edi, [esp+8]
sub ecx, [esp]
jnc @b
mov ebx, ecx
add ecx, [esp]
mov eax, [esp+8]
mov [ebp+NTFS.fileDataSize], ecx
mov [ebp+NTFS.fileDataStart], eax
push edi
add edi, ecx
neg ebx
call ntfsSpaceFree
pop edi
jc .end
@@:
call ntfs_decode_mcb_entry
jnc .end
cmp dword[esp+8], 0
jz @b
add edi, [esp+8]
mov ebx, [esp]
call ntfsSpaceFree
jnc @b
.end:
add esp, 16
pop edi
cmp [ebp+NTFS.fileDataSize], 0
jz @f
mov esi, [ebp+NTFS.attr_offs]
call createMcbEntry
mov [ebp+NTFS.fileDataSize], 0
@@:
ret
.resident:
test edx, edx
jnz .nonResident
cmp eax, 8000h
jnc .nonResident
add ax, [esi+attributeOffset]
sub eax, [esi+sizeWithHeader]
jc @f
mov edi, [ebp+NTFS.frs_buffer]
mov ecx, eax
add ecx, [edi+recordRealSize]
cmp [edi+recordAllocatedSize], ecx
jc .nonResident
add eax, 7
and eax, not 7
add [edi+recordRealSize], eax
add edi, [edi+recordRealSize]
add [esi+sizeWithHeader], eax
add esi, [esi+sizeWithHeader]
mov ecx, edi
sub ecx, esi
shr ecx, 2
sub edi, 4
mov esi, edi
sub esi, eax
std
rep movsd
mov ecx, eax
shr ecx, 2
xor eax, eax
rep stosd
cld
mov esi, [ebp+NTFS.attr_offs]
@@:
mov eax, dword [ebp+NTFS.attr_size]
mov [esi+sizeWithoutHeader], eax
mov [ebp+NTFS.fileDataSize], 0
clc
ret
.nonResident: ; convert resident to non-resident
mov eax, dword [ebp+NTFS.attr_size]
sub eax, 1
sbb edx, 0
mov ecx, [ebp+NTFS.sectors_per_cluster]
shl ecx, 9
div ecx
inc eax
mov [ebp+NTFS.fileDataSize], eax
mov edi, [ebp+NTFS.BitmapStart]
push ecx
call ntfsSpaceAlloc
pop ecx
jc .err2
mov esi, [ebp+NTFS.attr_offs]
xor eax, eax
xor edx, edx
@@:
add eax, ecx
inc edx
cmp eax, [esi+sizeWithoutHeader]
jc @b
push edx
push eax
stdcall kernel_alloc, eax
mov ecx, [esp]
shr ecx, 2
mov edi, eax
mov ebx, eax
xor eax, eax
rep stosd
mov al, [esi+attributeOffset]
mov ecx, [esi+sizeWithoutHeader]
add esi, eax
mov edi, ebx
rep movsb
mov eax, [ebp+NTFS.fileDataStart]
mul [ebp+NTFS.sectors_per_cluster]
pop ecx
shr ecx, 9
call fs_write64_app
stdcall kernel_free, ebx
mov esi, [ebp+NTFS.attr_offs]
add esi, [esi+sizeWithHeader]
mov ecx, [ebp+NTFS.frs_buffer]
add ecx, [ecx+recordRealSize]
sub ecx, esi
shr ecx, 2
lea edi, [ebp+NTFS.bitmap_buf]
push ecx
rep movsd
mov edi, [ebp+NTFS.attr_offs]
add edi, 16
mov cl, 6
xor eax, eax
rep stosd
mov edi, [ebp+NTFS.attr_offs]
mov eax, [ebp+NTFS.fileDataSize]
dec eax
mov [edi+lastVCN], eax
inc eax
mov ecx, [ebp+NTFS.sectors_per_cluster]
shl ecx, 9
mul ecx
mov byte [edi+sizeWithHeader], 50h
mov byte [edi+nonResidentFlag], 1
mov byte [edi+dataRunsOffset], 40h
mov [edi+attributeAllocatedSize], eax
mov [edi+attributeAllocatedSize+4], edx
mov eax, dword [ebp+NTFS.attr_size]
mov edx, dword [ebp+NTFS.attr_size+4]
mov [edi+attributeRealSize], eax
mov [edi+attributeRealSize+4], edx
mov [edi+initialDataSize], eax
mov [edi+initialDataSize+4], edx
mov esi, edi
add edi, 40h
call createMcbEntry
mov eax, edi
mov edi, [ebp+NTFS.attr_offs]
sub eax, edi
add eax, 8
and eax, not 7
mov [edi+sizeWithHeader], eax
pop ecx
lea esi, [ebp+NTFS.bitmap_buf]
add edi, eax
rep movsd
mov esi, [ebp+NTFS.frs_buffer]
sub edi, esi
mov [esi+recordRealSize], edi
pop edx
sub [ebp+NTFS.fileDataSize], edx
add [ebp+NTFS.fileDataStart], edx
ret
.makeResident: ; convert non-resident to empty resident
movzx eax, byte [esi+dataRunsOffset]
mov byte [esi+nonResidentFlag], 0
mov dword [esi+sizeWithoutHeader], 0
mov dword [esi+attributeOffset], 18h
add esi, eax
xor edi, edi
sub esp, 16
@@:
call ntfs_decode_mcb_entry
jnc @f
cmp dword[esp+8], 0
jz @b
add edi, [esp+8]
mov ebx, [esp]
call ntfsSpaceFree
jnc @b
@@:
add esp, 16
mov [ebp+NTFS.fileDataSize], 0
ret
ntfsSpaceClean:
; clean up to 16 Mb of disk space
; in:
; [ebp+NTFS.fileDataStart] = block to clean
; [ebp+NTFS.fileDataSize] = block size
mov eax, [ebp+NTFS.fileDataSize]
test eax, eax
jz @f
mul [ebp+NTFS.sectors_per_cluster]
cmp eax, 8001h
jnc @f
push eax
shl eax, 9
stdcall kernel_alloc, eax
pop ecx
test eax, eax
jz @f
push ecx
shl ecx, 7
mov edi, eax
mov ebx, eax
xor eax, eax
rep stosd
mov eax, [ebp+NTFS.fileDataStart]
mul [ebp+NTFS.sectors_per_cluster]
mov [ebp+NTFS.LastRead], eax
pop ecx
call fs_write64_app
stdcall kernel_free, ebx
@@:
ret
ntfsSpaceAlloc:
; allocate disk space
; in:
; edi = offset in bitmap to start search from
; [ebp+NTFS.fileDataSize] = block size in clusters
; out:
; [ebp+NTFS.fileDataStart] = allocated block starting cluster
; CF=1 -> disk full
mov ecx, [ebp+NTFS.BitmapBuffer]
add edi, ecx
add ecx, [ebp+NTFS.BitmapSize]
sub ecx, edi
ja @f
push eax
call bitmapBuffering
pop eax
shl ecx, 2
@@:
shr ecx, 2
push ecx
mov eax, [ebp+NTFS.fileDataSize]
shr eax, 5
jz .small
mov ebx, eax ; bitmap dwords
.start:
mov ecx, [ebp+NTFS.BitmapBuffer]
add ecx, [ebp+NTFS.BitmapSize]
sub ecx, edi
shr ecx, 2
@@:
xor eax, eax
repnz scasd ; search for empty dword
jz @f
call bitmapBuffering
jmp @b
@@:
cmp ecx, ebx
jnc @f
call bitmapBuffering
jmp @b
@@:
sub edi, 4
mov ecx, ebx
mov esi, edi
xor eax, eax
repz scasd ; check following dwords
jnz .start
sub esi, 4
mov eax, [esi]
xor edx, edx
bsr edx, eax
inc edx
push edx ; starting bit
push esi ; starting dword
add esi, 4
neg edx
add edx, 32
mov eax, [ebp+NTFS.fileDataSize]
sub eax, edx
mov edx, eax
shr eax, 5
shl eax, 2
add esi, eax
mov eax, [esi]
bsf ecx, eax ; check last dword
jz .done
and edx, 31
cmp ecx, edx
jnc .done
add esp, 8
jmp .start
@@:
sub edi, 4
call bitmapBuffering
push ecx
.small: ; less than 32 clusters
pop ecx
or eax, -1
repz scasd
jecxz @b
push ecx
mov eax, [edi-4]
not eax
@@:
bsf ecx, eax ; first 0
jz .small
not eax
shr eax, cl
shl eax, cl
bsf edx, eax ; next 1
jz @f
sub edx, ecx
cmp edx, [ebp+NTFS.fileDataSize]
jnc .got ; fits inside
bsf ecx, eax
not eax
shr eax, cl
shl eax, cl
jmp @b
@@: ; next dword
mov eax, [edi]
bsf edx, eax
jz .got ; empty
add edx, 32
sub edx, ecx
cmp edx, [ebp+NTFS.fileDataSize]
jc .small
.got:
sub edi, 4
push ecx ; starting bit
push edi ; starting dword
.done: ; mark space
pop edi ecx
cmp ecx, 32
jc @f
xor ecx, ecx
add edi, 4
@@:
push ecx edi
or eax, -1
shr eax, cl
shl eax, cl
neg ecx
add ecx, 32
sub ecx, [ebp+NTFS.fileDataSize]
jc @f
shl eax, cl ; fits inside dword
shr eax, cl
or [edi], eax
jmp .end
@@:
or [edi], eax
neg ecx
push ecx
shr ecx, 5
add edi, 4
or eax, -1
rep stosd
pop ecx
and ecx, 31
shr eax, cl
shl eax, cl
not eax
or [edi], eax
.end:
pop eax
pop ecx
sub eax, [ebp+NTFS.BitmapBuffer]
shl eax, 3
add eax, ecx
pop ecx
mov ecx, [ebp+NTFS.fileDataSize]
mov [ebp+NTFS.fileDataStart], eax
add ecx, eax
add ecx, 4095
shr ecx, 3+9
shr eax, 3+9
sub ecx, eax
mov ebx, eax
shl ebx, 9
add eax, [ebp+NTFS.BitmapLocation]
add ebx, [ebp+NTFS.BitmapBuffer]
xor edx, edx
jmp fs_write64_app
ntfsSpaceFree:
; free disk space
; in:
; edi = starting cluster
; ebx = size in clusters
mov eax, edi
add eax, ebx
shr eax, 3
cmp eax, [ebp+NTFS.BitmapSize]
jc @f
add eax, [ebp+NTFS.BitmapBuffer]
push edi
mov edi, eax
call bitmapBuffering
pop edi
@@:
push edi
mov ecx, edi
shr edi, 5
shl edi, 2
add edi, [ebp+NTFS.BitmapBuffer]
and ecx, 31
xor eax, eax
dec eax
shr eax, cl
shl eax, cl
neg ecx
add ecx, 32
sub ecx, ebx
jc @f
shl eax, cl ; fits inside dword
shr eax, cl
not eax
and [edi], eax
jmp .writeBitmap
@@:
not eax
and [edi], eax
neg ecx
push ecx
shr ecx, 5
add edi, 4
xor eax, eax
rep stosd
pop ecx
and ecx, 31
dec eax
shr eax, cl
shl eax, cl
and [edi], eax
.writeBitmap:
pop eax
mov edi, eax
lea ecx, [eax+ebx+4095]
shr eax, 3+9
shr ecx, 3+9
sub ecx, eax
mov ebx, eax
shl ebx, 9
add eax, [ebp+NTFS.BitmapLocation]
add ebx, [ebp+NTFS.BitmapBuffer]
xor edx, edx
jmp fs_write64_app
bitmapBuffering:
; Extend BitmapBuffer and read next 32kb of bitmap
; Warning: $Bitmap fragmentation is not foreseen
; in: edi -> position in bitmap buffer
; out: ecx = number of buffered dwords left
push ebx
mov eax, [ebp+NTFS.BitmapTotalSize]
cmp eax, [ebp+NTFS.BitmapSize]
jz .end
stdcall alloc_pages, 8
test eax, eax
jz .end
add eax, 3
mov ebx, [ebp+NTFS.BitmapBuffer]
add ebx, [ebp+NTFS.BitmapSize]
push ebx
mov ecx, 8
call commit_pages
mov eax, [ebp+NTFS.BitmapSize]
shr eax, 9
add eax, [ebp+NTFS.BitmapLocation]
pop ebx
mov ecx, 64
xor edx, edx
call fs_read64_app
test eax, eax
jnz .err
mov eax, [ebp+NTFS.BitmapSize]
add eax, 8000h
cmp [ebp+NTFS.BitmapTotalSize], eax
jnc @f
mov eax, [ebp+NTFS.BitmapTotalSize]
@@:
mov [ebp+NTFS.BitmapSize], eax
pop ebx
mov ecx, [ebp+NTFS.BitmapBuffer]
add ecx, eax
sub ecx, edi
jbe bitmapBuffering
shr ecx, 2
ret
.err:
mov eax, [ebp+NTFS.BitmapBuffer]
add eax, [ebp+NTFS.BitmapSize]
mov ecx, 8
call release_pages
.end:
add esp, 12 ; ret
stc
ret
;----------------------------------------------------------------
ntfs_WriteFile:
call ntfs_lock
call ntfs_find_lfn
jc ntfsNotFound
cmp [ebp+NTFS.cur_iRecord], 16
jc ntfsDenied
test dword [eax+fileFlags], 10000001h
jnz ntfsDenied
cmp [ebp+NTFS.fragmentCount], 1
jnz ntfsUnsupported ; record fragmented
; edit directory node
mov edi, [ebp+NTFS.cur_index_buf]
cmp dword [edi], 'INDX'
jz @f
mov esi, [ebp+NTFS.frs_buffer]
mov ecx, [esi+recordRealSize]
shr ecx, 2
rep movsd
mov esi, [ebp+NTFS.attr_offs]
mov cl, [esi+attributeOffset]
sub esi, [ebp+NTFS.frs_buffer]
add eax, ecx
add eax, esi
@@:
mov edi, eax
mov eax, [ebx+4]
mov edx, [ebx+8]
add eax, [ebx+12]
adc edx, 0
mov [edi+fileRealSize], eax
mov [edi+fileRealSize+4], edx
push edx eax ebx
call ntfsGetTime
mov [edi+fileModified], eax
mov [edi+fileModified+4], edx
mov [edi+recordModified], eax
mov [edi+recordModified+4], edx
mov [edi+fileAccessed], eax
mov [edi+fileAccessed+4], edx
pop ebx ecx edx
mov eax, [ebp+NTFS.LastRead]
mov [ebp+NTFS.nodeLastRead], eax
mov [ebp+NTFS.cur_attr], 0x80
mov [ebp+NTFS.cur_offs], 0
mov [ebp+NTFS.cur_size], 0
call ntfs_read_attr
jc ntfsFail
mov esi, edi
mov edi, [ebp+NTFS.frs_buffer]
cmp word [edi+baseRecordReuse], 0
jnz ntfsUnsupported ; auxiliary record
mov al, [edi+attributeOffset]
add edi, eax
mov al, [edi+attributeOffset]
add edi, eax
mov eax, ecx
mov ecx, 6
add esi, fileModified
add edi, 8
rep movsd
mov ecx, [ebp+NTFS.attr_offs]
cmp word [ecx+attributeFlags], 0
jnz ntfsUnsupported
push ebx
cmp byte [ecx+nonResidentFlag], 0
jz .resizeAttribute
cmp edx, [ecx+attributeRealSize+4]
jc .writeNode
jnz .resizeAttribute
cmp [ecx+attributeRealSize], eax
jnc .writeNode
.resizeAttribute:
call resizeAttribute
jc ntfsErrorPop
mov ecx, [ebp+NTFS.attr_offs]
cmp byte [ecx+nonResidentFlag], 1
jz @f
mov ebx, [esp]
movzx edi, byte [ecx+attributeOffset]
add edi, ecx
add edi, [ebx+4]
mov ecx, [ebx+12]
mov esi, [ebx+16]
rep movsb
@@:
mov ebx, [ebp+NTFS.frs_buffer]
mov edx, [ebp+NTFS.mftLastRead]
call writeRecord ; file
call ntfs_restore_usa_frs
.writeNode:
mov ebx, [ebp+NTFS.cur_index_buf]
mov edx, [ebp+NTFS.nodeLastRead]
call writeRecord ; directory
pop ebx
mov ecx, [ebp+NTFS.attr_offs]
cmp byte [ecx+nonResidentFlag], 0
jz .done
mov ecx, [ebx+12]
test ecx, ecx
jz .done
mov eax, [ebx+4]
mov edx, [ebx+8]
mov esi, [ebx+16]
shrd eax, edx, 9
test dword[ebx+4], 1FFh
jz .aligned
mov [ebp+NTFS.cur_offs], eax
mov [ebp+NTFS.cur_size], 1
lea edi, [ebp+NTFS.bitmap_buf]
mov [ebp+NTFS.cur_buf], edi
call ntfs_read_attr.continue
jc ntfsDevice
mov eax, [ebx+4]
and eax, 1FFh
add edi, eax
sub eax, [ebp+NTFS.cur_read]
neg eax
push ecx
cmp ecx, eax
jb @f
mov ecx, eax
@@:
sub [esp], ecx
rep movsb
push ebx
mov eax, [ebp+NTFS.LastRead]
lea ebx, [ebp+NTFS.bitmap_buf]
mov ecx, 1
xor edx, edx
call fs_write64_app
pop ebx
pop ecx
test ecx, ecx
jz .done
mov eax, [ebx+4]
mov edx, [ebx+8]
shrd eax, edx, 9
inc eax
.aligned:
push ecx
shr ecx, 9
mov [ebp+NTFS.cur_offs], eax
mov [ebp+NTFS.cur_size], ecx
mov [ebp+NTFS.cur_buf], esi
add eax, ecx
push eax
mov [ebp+NTFS.bWriteAttr], 1
call ntfs_read_attr.continue
mov [ebp+NTFS.bWriteAttr], 0
pop [ebp+NTFS.cur_offs]
pop ecx
jc ntfsDevice
and ecx, 1FFh
jz .done
add esi, [ebp+NTFS.cur_read]
mov [ebp+NTFS.cur_size], 1
lea edi, [ebp+NTFS.bitmap_buf]
mov [ebp+NTFS.cur_buf], edi
call ntfs_read_attr.continue
jc ntfsDevice
rep movsb
push ebx
mov eax, [ebp+NTFS.LastRead]
lea ebx, [ebp+NTFS.bitmap_buf]
mov ecx, 1
xor edx, edx
call fs_write64_app
pop ebx
.done:
mov ebx, [ebx+12]
jmp ntfsDone
;----------------------------------------------------------------
ntfs_Delete:
call ntfs_lock
call ntfs_find_lfn
jc ntfsNotFound
cmp [ebp+NTFS.cur_iRecord], 16
jc ntfsDenied
test byte [eax+fileFlags], 1
jnz ntfsDenied
cmp [ebp+NTFS.fragmentCount], 1
jnz ntfsUnsupported ; record fragmented
mov ebx, [eax+directoryRecordReference]
mov [ebp+NTFS.newRecord], ebx
mov bx, [eax+fileReferenceReuse]
mov [ebp+NTFS.indexPointer], esi
mov eax, [ebp+NTFS.cur_iRecord]
shr eax, 3
cmp eax, [ebp+NTFS.mftBitmapSize]
jnc ntfsUnsupported
; examine file record
mov [ebp+NTFS.cur_attr], 0x80 ; file?
mov [ebp+NTFS.cur_offs], 0
mov [ebp+NTFS.cur_size], 0
call ntfs_read_attr
jnc @f
xor eax, eax
push ebx eax eax eax eax
mov [esp+12], esp
push eax
mov ebx, esp
mov [ebp+NTFS.cur_attr], 0x90 ; folder?
call ntfs_ReadFolder.doit
mov edx, [esp+12]
add esp, 20
pop ebx
test eax, eax
jnz .ret
cmp edx, 2
jnz ntfsDenied ; folder is not empty
mov [ebp+NTFS.cur_attr], 0xA0
mov [ebp+NTFS.cur_offs], 0
mov [ebp+NTFS.cur_size], 0
call ntfs_read_attr.newAttribute
jc .deleteFileRecord
@@:
mov esi, [ebp+NTFS.frs_buffer]
cmp word [esi+baseRecordReuse], 0
jnz ntfsUnsupported ; auxiliary record
cmp word [esi+reuseCounter], bx
jnz .backToIndex ; broken index
test byte [esi+recordFlags], 1
jz .writeBitmapMFT ; record deleted
cmp byte [esi+hardLinkCounter], 3
jnc ntfsUnsupported
mov esi, [ebp+NTFS.attr_offs]
cmp byte [esi+nonResidentFlag], 0
jz .deleteFileRecord
movzx eax, byte [esi+dataRunsOffset]
add esi, eax
xor edi, edi
sub esp, 16
@@:
call ntfs_decode_mcb_entry
jnc @f
cmp dword[esp+8], 0
jz @b
add edi, [esp+8]
mov ebx, [esp]
call ntfsSpaceFree
jnc @b
@@:
add esp, 16
.deleteFileRecord:
mov ebx, [ebp+NTFS.frs_buffer]
mov byte [ebx+recordFlags], 0
mov edx, [ebp+NTFS.mftLastRead]
call writeRecord
.writeBitmapMFT:
mov eax, [ebp+NTFS.cur_iRecord]
mov ecx, eax
shr eax, 3
and ecx, 7
mov edi, [ebp+NTFS.mftBitmapBuffer]
btr [edi+eax], ecx
shr eax, 9
mov ebx, eax
shl ebx, 9
add eax, [ebp+NTFS.mftBitmapLocation]
add ebx, edi
mov ecx, 1
xor edx, edx
call fs_write64_sys
.backToIndex:
mov eax, [ebp+NTFS.newRecord]
mov [ebp+NTFS.cur_iRecord], eax
mov esi, [ebp+NTFS.indexPointer]
call ntfs_find_lfn.doit2
jc ntfsFail
mov ebx, [ebp+NTFS.secondIndexBuffer]
mov byte [ebx], 0
mov ebx, [ebp+NTFS.LastRead]
mov [ebp+NTFS.nodeLastRead], ebx
xor ebx, ebx
test byte [eax+indexFlags], 1
jz .deleteIndex ; no subnode
mov edi, eax
call .findSubindex
jc ntfsFail
movzx edx, word [edi+indexAllocatedSize]
test esi, esi
jz @f
sub edx, eax
sub edx, 8
@@:
mov eax, edi
mov ebx, esi
jmp @f
.deleteIndex:
movzx edx, word [eax+indexAllocatedSize]
mov ecx, [eax+fileRecordReference]
cmp [eax+edx+fileRecordReference], ecx
jnz @f
add dx, [eax+edx+indexAllocatedSize]
@@:
mov edi, [ebp+NTFS.cur_index_buf]
cmp dword [edi], 'INDX'
jz .indexRecord
sub eax, edi
mov edi, [ebp+NTFS.indexRoot]
sub [edi+sizeWithHeader], edx
sub [edi+sizeWithoutHeader], edx
movzx ecx, byte [edi+attributeOffset]
add edi, ecx
add eax, edi
sub [edi+rootNode+nodeRealSize], edx
sub [edi+rootNode+nodeAllocatedSize], edx
mov edi, [ebp+NTFS.frs_buffer]
sub [edi+recordRealSize], edx
mov ecx, [edi+recordRealSize]
cmp [edi+recordAllocatedSize], ecx
jmp @f
.indexRecord:
add edi, recordNode
sub [edi+nodeRealSize], edx
mov ecx, [edi+nodeRealSize]
cmp [edi+nodeAllocatedSize], ecx
@@:
jc ntfsUnsupported
add ecx, edi
sub ecx, eax
mov esi, eax
add esi, edx
mov edi, eax
test edx, edx
jns @f
neg edx
add edx, ecx
sub edx, 4
add esi, edx
add edi, edx
std
@@:
jz @f
shr ecx, 2
rep movsd
cld
@@:
test ebx, ebx
jz .done
; copy index from the subnode to replace deleted pointing index
movzx ecx, word [ebx+indexAllocatedSize]
mov edx, ecx
test byte [ebx+indexFlags], 1
jz @f
sub ecx, 8
movzx edi, word [ebx+edx+indexAllocatedSize]
add edi, edx
mov esi, [ebx+ecx]
mov [ebx+edi-8], esi
mov [ebx+indexAllocatedSize], cx
@@:
shr ecx, 2
mov esi, ebx
mov edi, eax
rep movsd
add word [eax+indexAllocatedSize], 8
mov byte [eax+indexFlags], 1
mov edi, [ebp+NTFS.secondIndexBuffer]
mov eax, ebx
xor ebx, ebx
jmp .indexRecord
.done:
mov ebx, [ebp+NTFS.frs_buffer]
mov edx, [ebp+NTFS.rootLastRead]
call writeRecord
mov ebx, [ebp+NTFS.cur_index_buf]
cmp dword [ebx], 'INDX'
jnz @f
mov edx, [ebp+NTFS.nodeLastRead]
call writeRecord
@@:
mov ebx, [ebp+NTFS.secondIndexBuffer]
cmp byte [ebx], 0
jz ntfsDone
mov edx, [ebp+NTFS.LastRead]
call writeRecord
jmp ntfsDone
.findSubindex:
; in: eax -> index
; out:
; CF=1 -> error
; esi=0 -> subnode deleted
; esi -> replacement index
; eax = index effective size
movzx edx, word [eax+indexAllocatedSize]
mov eax, [eax+edx-8]
mov edx, [ebp+NTFS.cur_size]
push edx
cmp edx, [ebp+NTFS.cur_subnode_size]
jz @f
mul [ebp+NTFS.sectors_per_cluster]
@@:
mov [ebp+NTFS.cur_attr], 0xA0
mov [ebp+NTFS.cur_offs], eax
push eax
mov ebx, [ebp+NTFS.secondIndexBuffer]
mov esi, ebx
mov [ebp+NTFS.cur_buf], ebx
call ntfs_read_attr.newAttribute
pop [ebp+NTFS.cur_offs]
pop eax
jc .ret
cmp dword [esi], 'INDX'
stc
jnz .ret
mov [ebp+NTFS.cur_size], eax
shl eax, 9
call ntfs_restore_usa
jc .ret
add esi, recordNode
add esi, [esi+indexOffset]
test byte [esi+indexFlags], 2
jnz .emptyNode
cmp [ebp+NTFS.fragmentCount], 1
stc
jnz .ret ; record fragmented
xor eax, eax
@@:
add esi, eax
mov ax, [esi+indexAllocatedSize]
test byte [esi+eax+indexFlags], 2
jz @b
test byte [esi+indexFlags], 1
jz .ret
add eax, esi
push esi
push [ebp+NTFS.cur_offs]
call .findSubindex
pop [ebp+NTFS.cur_offs]
pop edx
jc .ret
test esi, esi
jnz .ret
mov esi, edx
mov ebx, [ebp+NTFS.secondIndexBuffer]
mov [ebp+NTFS.cur_buf], ebx
push [ebp+NTFS.cur_size]
call ntfs_read_attr.continue
pop eax
jc .ret
shl eax, 9
call ntfs_restore_usa
jc .ret
movzx eax, word [esi+indexAllocatedSize]
sub eax, 8
.ret:
ret
.emptyNode:
test byte [esi+indexFlags], 1
jz @f
mov eax, esi
push [ebp+NTFS.cur_offs]
call .findSubindex
pop [ebp+NTFS.cur_offs]
jc .ret
test esi, esi
jnz .ret
@@: ; delete node
mov esi, [ebp+NTFS.attr_offs]
add esi, [esi+sizeWithHeader]
cmp byte [esi], 0xB0
stc
jnz .ret
movzx eax, byte [esi+attributeOffset]
add esi, eax
mov eax, [ebp+NTFS.cur_offs]
xor edx, edx
div [ebp+NTFS.cur_size]
mov edx, eax
shr eax, 3
and edx, 7
btr [esi+eax], edx
mov esi, [ebp+NTFS.secondIndexBuffer]
mov byte [esi], 0
xor esi, esi
ret
;----------------------------------------------------------------
ntfs_SetFileEnd:
call ntfs_lock
call ntfs_find_lfn
jc ntfsNotFound
cmp [ebp+NTFS.cur_iRecord], 16
jc ntfsDenied
test dword [eax+fileFlags], 10000001h
jnz ntfsDenied
cmp [ebp+NTFS.fragmentCount], 1
jnz ntfsUnsupported ; record fragmented
; edit directory node
mov edi, [ebp+NTFS.cur_index_buf]
cmp dword [edi], 'INDX'
jz @f
mov esi, [ebp+NTFS.frs_buffer]
mov ecx, [esi+recordRealSize]
shr ecx, 2
rep movsd
mov esi, [ebp+NTFS.attr_offs]
mov cl, [esi+attributeOffset]
sub esi, [ebp+NTFS.frs_buffer]
add eax, ecx
add eax, esi
@@:
mov edi, eax
mov eax, [ebx+4]
mov edx, [ebx+8]
mov [edi+fileRealSize], eax
mov [edi+fileRealSize+4], edx
push edx eax ebx
call ntfsGetTime
mov [edi+fileModified], eax
mov [edi+fileModified+4], edx
mov [edi+recordModified], eax
mov [edi+recordModified+4], edx
mov [edi+fileAccessed], eax
mov [edi+fileAccessed+4], edx
pop ebx ecx edx
mov eax, [ebp+NTFS.LastRead]
mov [ebp+NTFS.nodeLastRead], eax
mov [ebp+NTFS.cur_attr], 0x80
mov [ebp+NTFS.cur_offs], 0
mov [ebp+NTFS.cur_size], 0
call ntfs_read_attr
jc ntfsFail
mov esi, edi
mov edi, [ebp+NTFS.frs_buffer]
cmp word [edi+baseRecordReuse], 0
jnz ntfsUnsupported ; auxiliary record
mov al, [edi+attributeOffset]
add edi, eax
mov al, [edi+attributeOffset]
add edi, eax
mov eax, ecx
mov ecx, 6
add esi, fileModified
add edi, 8
rep movsd
mov ecx, [ebp+NTFS.attr_offs]
cmp word [ecx+attributeFlags], 0
jnz ntfsUnsupported
cmp byte [ecx+nonResidentFlag], 0
jz .resizeAttribute
cmp [ecx+attributeRealSize+4], edx
jnz .resizeAttribute
cmp [ecx+attributeRealSize], eax
jnc .resizeAttribute
mov eax, [ecx+attributeRealSize]
mov ecx, [ebp+NTFS.sectors_per_cluster]
mov [ebp+NTFS.cur_size], ecx
shl ecx, 9
div ecx
test edx, edx
jz .aligned
push edx
push ecx
mul [ebp+NTFS.sectors_per_cluster]
mov [ebp+NTFS.cur_offs], eax
stdcall kernel_alloc, ecx
pop ecx
pop edi
mov esi, eax
sub ecx, edi
add edi, eax
mov [ebp+NTFS.cur_buf], eax
call ntfs_read_attr.continue
jc @f
xor eax, eax
rep stosb
push ebx
mov eax, [ebp+NTFS.LastRead]
mov ebx, esi
mov ecx, [ebp+NTFS.sectors_per_cluster]
xor edx, edx
call fs_write64_app
pop ebx
@@:
stdcall kernel_free, esi
.aligned:
mov eax, [ebx+4]
mov edx, [ebx+8]
.resizeAttribute:
call resizeAttribute
jc ntfsError
mov ebx, [ebp+NTFS.frs_buffer]
mov edx, [ebp+NTFS.mftLastRead]
call writeRecord ; file
mov ebx, [ebp+NTFS.cur_index_buf]
mov edx, [ebp+NTFS.nodeLastRead]
call writeRecord ; directory
call ntfsSpaceClean
jmp ntfsDone
ntfsGetTime:
call fsGetTime
jmp @f
ntfsCalculateTime:
; in: esi -> data block
; out: edx:eax = seconds since 01.01.1601 x10000000
call fsCalculateTime
@@:
mov edx, 10000000
mul edx
add eax, 3365781504
adc edx, 29389701
ret
;----------------------------------------------------------------
ntfs_SetFileInfo:
call ntfs_lock
call ntfs_find_lfn
jnc @f
test eax, eax
jz ntfsFail
jmp ntfsNotFound
@@:
cmp [ebp+NTFS.fragmentCount], 1
jnz ntfsUnsupported ; record fragmented
mov esi, [ebp+NTFS.cur_index_buf]
cmp dword [esi], 'INDX'
jz @f
sub eax, esi
mov esi, [ebp+NTFS.indexRoot]
movzx edx, byte [esi+attributeOffset]
add eax, esi
add eax, edx
@@:
mov esi, [ebx+16]
mov edi, eax
mov eax, [esi]
and eax, 27h
and byte [edi+fileFlags], -28h
or [edi+fileFlags], al
add esi, 8
call ntfsCalculateTime
mov [edi+fileCreated], eax
mov [edi+fileCreated+4], edx
add esi, 8
call ntfsCalculateTime
mov [edi+fileAccessed], eax
mov [edi+fileAccessed+4], edx
add esi, 8
call ntfsCalculateTime
mov [edi+fileModified], eax
mov [edi+fileModified+4], edx
mov ebx, [ebp+NTFS.cur_index_buf]
cmp dword [ebx], 'INDX'
jz @f
mov ebx, [ebp+NTFS.frs_buffer]
@@:
mov edx, [ebp+NTFS.LastRead]
call writeRecord
jmp ntfsDone
ntfsUnsupported:
push ERROR_UNSUPPORTED_FS
jmp ntfsOut
ntfsDevice:
push ERROR_DEVICE
jmp ntfsOut
ntfsNotFound:
push ERROR_FILE_NOT_FOUND
jmp ntfsOut
ntfsDenied:
push ERROR_ACCESS_DENIED
jmp ntfsOut
ntfsFail:
push ERROR_FS_FAIL
jmp ntfsOut
ntfsDiskFull:
push ERROR_DISK_FULL
jmp ntfsOut
ntfsErrorPop5:
pop ebx
pop ebx
ntfsErrorPop3:
pop ebx
ntfsErrorPop2:
pop ebx
ntfsErrorPop:
pop ebx
ntfsError:
push eax
ntfsOut:
call ntfs_unlock
xor ebx, ebx
pop eax
ret
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