2711 lines
89 KiB
C++
2711 lines
89 KiB
C++
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; ;;
|
||
;; Copyright (C) KolibriOS team 2021-2022. All rights reserved. ;;
|
||
;; Distributed under terms of the GNU General Public License. ;;
|
||
;; ;;
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
||
$Revision$
|
||
|
||
; exFAT external functions
|
||
; in:
|
||
; ebx -> parameter structure of sysfunc 70
|
||
; ebp -> exFAT structure
|
||
; esi -> path string in UTF-8
|
||
; out:
|
||
; eax, ebx = return values for sysfunc 70
|
||
iglobal
|
||
align 4
|
||
exFAT_user_functions:
|
||
dd exFAT_free
|
||
dd (exFAT_user_functions_end - exFAT_user_functions - 4) / 4
|
||
dd exFAT_ReadFile
|
||
dd exFAT_ReadFolder
|
||
dd 0 ;exFAT_CreateFile
|
||
dd 0 ;exFAT_Write
|
||
dd 0 ;exFAT_SetFileEnd
|
||
dd exFAT_GetFileInfo
|
||
dd exFAT_SetFileInfo
|
||
dd 0
|
||
dd exFAT_Delete
|
||
dd 0 ;exFAT_CreateFolder
|
||
dd 0 ;exFAT_Rename
|
||
exFAT_user_functions_end:
|
||
endg
|
||
|
||
struct exFAT PARTITION
|
||
fat_change db ? ; 1=fat has changed
|
||
ClstHeap_change db ? ; 1=Cluster Heap has changed
|
||
createOption db ?
|
||
rb 2
|
||
Lock MUTEX ; currently operations with one partition
|
||
; can not be executed in parallel since the legacy code is not ready
|
||
FAT_START dd ? ; start of fat table
|
||
ROOT_START dd ? ; start of rootdir
|
||
SECTORS_PER_CLUSTER dd ?
|
||
BYTES_PER_SECTOR dd ? ; Note: if BPS <> 512 need lots of changes
|
||
SECTORS_PER_FAT dd ?
|
||
NUMBER_OF_FATS dd ?
|
||
CLUSTER_HEAP_START dd ?
|
||
CLUSTER_COUNT dd ?
|
||
DATA_START dd ? ; start of data area (=first cluster 2)
|
||
LAST_CLUSTER dd ? ; last availabe cluster
|
||
fatRESERVED dd ?
|
||
fatBAD dd ?
|
||
fatEND dd ?
|
||
fatMASK dd ?
|
||
fatStartScan dd ?
|
||
cluster_tmp dd ? ; used by analyze_directory and analyze_directory_to_write
|
||
ROOT_CLUSTER dd ? ; first rootdir cluster
|
||
points_to_BDFE dd ?
|
||
secondary_dir_entry dd ?
|
||
longname_sec1 dd ? ; used by analyze_directory to save 2 previous
|
||
longname_sec2 dd ? ; directory sectors for delete long filename
|
||
longname_sector1 dd ? ; used by analyze_directory to save 2 previous
|
||
longname_sector2 dd ? ; directory sectors for delete long filename
|
||
LFN_reserve_place dd ?
|
||
path_in_UTF8 dd ?
|
||
General_Sec_Flags dd ?
|
||
valid_data_length dd ?
|
||
RAX_high dd ?
|
||
RCX_high dd ?
|
||
RDX_high dd ?
|
||
RDI_high dd ?
|
||
current_hash dd ?
|
||
hash_flag dd ?
|
||
need_hash dd ?
|
||
buffer_curr_sector dd ?
|
||
buff_file_dirsect dd ?
|
||
buff_file_dir_pos dd ?
|
||
fname_extdir_offset dd ?
|
||
fat_in_cache dd ?
|
||
fat_cache_ptr dd ?
|
||
ClstHeap_in_cache dd ?
|
||
ClstHeap_cache_ptr dd ?
|
||
volumeLabel rb 12
|
||
; The next areas (32*19) should be arranged sequentially.
|
||
; Do not change their location!!!
|
||
file_dir_entry rb 32 ; Entry Type 0x85
|
||
str_ext_dir_entry rb 32 ; Entry Type 0xC0
|
||
fname_ext_dir_entry rb 32*17 ; Entry Type 0xC1 * 17 Entries
|
||
buffer rb 512
|
||
ends
|
||
|
||
; these labels are located before the main function to make
|
||
; most of jumps to these be short
|
||
exFAT_create_partition.free_return0:
|
||
mov eax, ebp
|
||
call free
|
||
pop ebp
|
||
; DEBUGF 1, "K : exFAT_create_partition.free_return0 EAX: %x\n", eax
|
||
exFAT_create_partition.return0:
|
||
xor eax, eax
|
||
; DEBUGF 1, "K : exFAT_create_partition.return0 EAX: %x\n", eax
|
||
ret
|
||
|
||
; Mount if it's a valid exFAT partition.
|
||
exFAT_create_partition:
|
||
; DEBUGF 1, "K : exFAT_create_partition EAX: %x\n", eax
|
||
; in:
|
||
; ebp -> PARTITION structure
|
||
; ebx -> boot sector
|
||
; ebx+512 -> buffer
|
||
; out:
|
||
; eax -> exFAT structure, 0 = not exFAT
|
||
cmp dword [esi+DISK.MediaInfo.SectorSize], 512
|
||
jnz .return0
|
||
; DEBUGF 1, "K : exFAT DISK.MediaInfo.SectorSize=512\n"
|
||
; bootsector must have been successfully read
|
||
cmp dword [esp+4], 0
|
||
jnz .return0
|
||
; DEBUGF 1, "K : exFAT bootsector successfully read\n"
|
||
; offset +510 = bootsector signature must be correct
|
||
cmp word [ebx+0x1fe], 0xaa55
|
||
jnz .return0
|
||
; DEBUGF 1, "K : exFAT bootsector signature correct\n"
|
||
; offset +109 = sectors per cluster must be nonzero
|
||
cmp byte [ebx+0x6d], 0
|
||
jz .return0
|
||
; DEBUGF 1, "K : exFAT sectors per cluster = nonzero\n"
|
||
; offset +108 = bytes per sector must be 0x200
|
||
; (LEGACY! In the future, increase support to 4096)
|
||
; the value for exFAT is a power of 2
|
||
cmp byte [ebx+0x6c], 9
|
||
jnz .return0
|
||
; DEBUGF 1, "K : exFAT bytes per sector = 512\n"
|
||
; Test name = 'EXFAT '
|
||
cmp dword [ebx+3], 'EXFA'
|
||
jnz .return0
|
||
cmp dword [ebx+7], 'T '
|
||
jnz .return0
|
||
; DEBUGF 1, "K : exFAT Test name EXFAT = OK \n"
|
||
movi eax, sizeof.exFAT
|
||
call malloc
|
||
test eax, eax
|
||
jz .return0
|
||
; DEBUGF 1, "K : exFAT malloc sizeof.exFAT = OK \n"
|
||
mov ecx, dword [ebp+PARTITION.FirstSector]
|
||
mov dword [eax+exFAT.FirstSector], ecx
|
||
; DEBUGF 1, "K : exFAT PARTITION.FirstSector ECX: %x\n", ecx
|
||
mov ecx, dword [ebp+PARTITION.FirstSector+4]
|
||
mov dword [eax+exFAT.FirstSector+4], ecx
|
||
; DEBUGF 1, "K : exFAT PARTITION.FirstSector+4 ECX: %x\n", ecx
|
||
mov ecx, dword [ebp+PARTITION.Length]
|
||
mov dword [eax+exFAT.Length], ecx
|
||
; DEBUGF 1, "K : exFAT PARTITION.Length ECX: %x\n", ecx
|
||
mov ecx, dword [ebp+PARTITION.Length+4]
|
||
mov dword [eax+exFAT.Length+4], ecx
|
||
; DEBUGF 1, "K : exFAT PARTITION.Length+4 ECX: %x\n", ecx
|
||
mov ecx, [ebp+PARTITION.Disk]
|
||
mov [eax+exFAT.Disk], ecx
|
||
; DEBUGF 1, "K : exFAT PARTITION.Disk ECX: %x\n", ecx
|
||
mov [eax+exFAT.FSUserFunctions], exFAT_user_functions
|
||
or [eax+exFAT.fat_in_cache], -1
|
||
mov [eax+exFAT.fat_change], 0
|
||
|
||
push ebp
|
||
mov ebp, eax
|
||
lea ecx, [ebp+exFAT.Lock]
|
||
call mutex_init
|
||
; offset +80 = sectors reserved
|
||
mov eax, [ebx+0x50]
|
||
mov [ebp+exFAT.FAT_START], eax
|
||
; DEBUGF 1, "K : exFAT.FAT_START EAX: %x\n", eax
|
||
; offset +109 = sectors per cluster. This is power of 2; Minimal value is 1;
|
||
; 2^0 =1 sector (512 Bytes) and maximum 32 MB cluster size in bytes
|
||
movzx ecx, byte [ebx+0x6d]
|
||
mov eax, 1
|
||
shl eax, cl
|
||
mov [ebp+exFAT.SECTORS_PER_CLUSTER], eax
|
||
; DEBUGF 1, "K : exFAT.SECTORS_PER_CLUSTER EAX: %x\n", eax
|
||
; offset +108 = bytes per sector. This is power of 2; Minimal value is 9;
|
||
; 2^9 =512 Bytes and maximum 2^12 =4096 Bytes
|
||
movzx ecx, byte [ebx+0x6c] ; bytes per sector
|
||
mov eax, 1
|
||
shl eax, cl
|
||
mov [ebp+exFAT.BYTES_PER_SECTOR], eax
|
||
; DEBUGF 1, "K : exFAT.BYTES_PER_SECTOR EAX: %x\n", eax
|
||
;------------------------------------------------------------------------------
|
||
; movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32)
|
||
; shl eax, 5 ; mul 32
|
||
; dec ecx
|
||
; add eax, ecx ; round up if not equal count
|
||
; inc ecx ; bytes per sector
|
||
; xor edx, edx
|
||
; div ecx
|
||
; mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors
|
||
;------------------------------------------------------------------------------
|
||
; offset +84 = Size of FAT in sectors
|
||
mov eax, [ebx+0x54] ; sectors per fat
|
||
mov [ebp+exFAT.SECTORS_PER_FAT], eax
|
||
; DEBUGF 1, "K : exFAT.SECTORS_PER_FAT EAX: %x\n", eax
|
||
;------------------------------------------------------------------------------
|
||
; offset +88 = Starting sector of cluster heap
|
||
mov eax, [ebx+0x58] ; Cluster offset
|
||
mov [ebp+exFAT.CLUSTER_HEAP_START], eax
|
||
; DEBUGF 1, "K : exFAT.CLUSTER_HEAP_START EAX: %x\n", eax
|
||
;------------------------------------------------------------------------------
|
||
; offset +92 = Number of clusters
|
||
mov eax, [ebx+0x5c] ; Cluster count
|
||
mov [ebp+exFAT.CLUSTER_COUNT], eax
|
||
; DEBUGF 1, "K : exFAT.CLUSTER_COUNT EAX: %x\n", eax
|
||
;------------------------------------------------------------------------------
|
||
; offset +110 = Either 1 or 2; if TexFAT is supported then it will be 2
|
||
movzx eax, byte [ebx+0x6e] ; number of fats
|
||
mov [ebp+exFAT.NUMBER_OF_FATS], eax
|
||
; DEBUGF 1, "K : exFAT.NUMBER_OF_FATS EAX: %x\n", eax
|
||
mul [ebp+exFAT.SECTORS_PER_FAT]
|
||
; DEBUGF 1, "K : exFAT.SECTORS_PER_FAT mul EAX: %x\n", eax
|
||
; test edx, edx
|
||
; jnz .free_return0
|
||
add eax, [ebp+exFAT.FAT_START]
|
||
jc .free_return0
|
||
|
||
; mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count
|
||
; add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32
|
||
; jc .free_return0
|
||
mov [ebp+exFAT.DATA_START], eax
|
||
; DEBUGF 1, "K : exFAT.DATA_START EAX: %x\n", eax
|
||
;------------------------------------------------------------------------------
|
||
; offset +72 = Total number of Sectors
|
||
mov eax, [ebx+0x48+4] ; total sector count high part
|
||
test eax, eax
|
||
jnz .free_return0 ; 32-BIT LIMIT - MODIFY LATER WITY RASP !!!
|
||
; DEBUGF 1, "K : exFAT Total number of Sectors+4 EAX: %x\n", eax
|
||
mov eax, [ebx+0x48] ; total sector count low part
|
||
; DEBUGF 1, "K : exFAT Total number of Sectors EAX: %x\n", eax
|
||
cmp dword [ebp+exFAT.Length+4], 0
|
||
jnz @f
|
||
; DEBUGF 1, "K : exFAT.Length+4 = 0\n"
|
||
cmp eax, dword [ebp+exFAT.Length]
|
||
ja .free_return0
|
||
; DEBUGF 1, "K : exFAT.Length >= Total number of Sectors\n"
|
||
@@:
|
||
mov dword [ebp+exFAT.Length], eax
|
||
and dword [ebp+exFAT.Length+4], 0
|
||
sub eax, [ebp+exFAT.DATA_START] ; eax = count of data sectors
|
||
jc .free_return0
|
||
; DEBUGF 1, "K : EAX - exFAT.DATA_START EAX: %x\n", eax
|
||
xor edx, edx
|
||
div [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
inc eax
|
||
mov [ebp+exFAT.LAST_CLUSTER], eax
|
||
; DEBUGF 1, "K : exFAT.LAST_CLUSTER EAX: %x\n", eax
|
||
dec eax ; cluster count
|
||
jz .free_return0
|
||
; DEBUGF 1, "K : exFAT.LAST_CLUSTER >= 2 EAX: %x\n",eax
|
||
mov [ebp+exFAT.fatStartScan], 2
|
||
; cmp eax, 0xfff5
|
||
; jb .fat16
|
||
;------------------------------------------------------------------------------
|
||
;.fat32:
|
||
; pusha
|
||
; lea esi, [ebx+71]
|
||
; lea edi, [ebp+exFAT.volumeLabel]
|
||
; movsd
|
||
; movsd
|
||
; movsd
|
||
; popa
|
||
;------------------------------------------------------------------------------
|
||
; offset +96 = First cluster of root directory
|
||
mov eax, [ebx+0x60] ; rootdir cluster
|
||
mov [ebp+exFAT.ROOT_CLUSTER], eax
|
||
; DEBUGF 1, "K : exFAT.ROOT_CLUSTER EAX: %x\n", eax
|
||
dec eax
|
||
dec eax
|
||
imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
add eax, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
mov [ebp+exFAT.ROOT_START], eax
|
||
; DEBUGF 1, "K : exFAT.ROOT_START EAX: %x\n", eax
|
||
;------------------------------------------------------------------------------
|
||
;------------------------------------------------------------------------------
|
||
; movzx eax, word [ebx+0x30]
|
||
; mov [ebp+FAT.ADR_FSINFO], eax
|
||
;------------------------------------------------------------------------------
|
||
; push ebx
|
||
; add ebx, 512
|
||
; call fs_read32_sys
|
||
; test eax, eax
|
||
; jnz @f
|
||
; mov eax, [ebx+0x1ec]
|
||
; cmp eax, -1
|
||
; jz @f
|
||
; mov [ebp+exFAT.fatStartScan], eax
|
||
;@@:
|
||
; pop ebx
|
||
;------------------------------------------------------------------------------
|
||
mov [ebp+exFAT.fatRESERVED], 0x0FFFFFF6
|
||
mov [ebp+exFAT.fatBAD], 0x0FFFFFF7
|
||
mov [ebp+exFAT.fatEND], 0x0FFFFFF8
|
||
mov [ebp+exFAT.fatMASK], 0x0FFFFFFF
|
||
;------------------------------------------------------------------------------
|
||
; mov al, 32
|
||
;.fat_not_12_finalize:
|
||
; mov [ebp+FAT.fs_type], al
|
||
;------------------------------------------------------------------------------
|
||
; For FAT16 and FAT32, allocate 512 bytes for FAT cache.
|
||
; For exFAT allocate 512 bytes for Cluster Heap cache.
|
||
mov eax, 512*2
|
||
call malloc
|
||
test eax, eax
|
||
jz .free_return0
|
||
mov [ebp+exFAT.fat_cache_ptr], eax
|
||
add eax, 512
|
||
mov [ebp+exFAT.ClstHeap_cache_ptr], eax
|
||
; DEBUGF 1, "K : malloc exFAT.fat_cache_ptr EAX: %x\n", eax
|
||
|
||
mov eax, ebp
|
||
pop ebp
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_free:
|
||
push eax
|
||
mov eax, [eax+exFAT.fat_cache_ptr]
|
||
; DEBUGF 1, "K : exFAT_free exFAT.fat_cache_ptr EAX: %x\n", eax
|
||
call free
|
||
pop eax
|
||
jmp free
|
||
;------------------------------------------------------------------------------
|
||
exFAT_lock:
|
||
; DEBUGF 1, "K : exFAT_lock \n"
|
||
lea ecx, [ebp+exFAT.Lock]
|
||
jmp mutex_lock
|
||
|
||
exFAT_unlock:
|
||
; DEBUGF 1, "K : exFAT_unlock \n"
|
||
lea ecx, [ebp+exFAT.Lock]
|
||
jmp mutex_unlock
|
||
;------------------------------------------------------------------------------
|
||
exFAT_get_name:
|
||
cmp byte [edi], 0
|
||
jz .no
|
||
; DEBUGF 1, "K : exFAT_get_name EDI:%x [EDI]:%x\n", edi, [edi]
|
||
; push ebp
|
||
; mov ebp,[esp+12+8+4+4+7*4+262*2+4+4]
|
||
; DEBUGF 1, "K : exFAT_get_name START Input FS EBP:%x\n", ebp
|
||
; pop ebp
|
||
; in: edi -> FAT entry, esi -> buffer for UTF-16 name
|
||
; out: CF=1 -> no valid entry
|
||
cmp byte [edi], 0x85 ; File/Folder Directory Entry of ExFAT
|
||
jz .file_directory_entry
|
||
cmp byte [edi], 0xC0 ; Stream Extension Directory Entry of ExFAT
|
||
jz .stream_extension_directory_entry
|
||
cmp byte [edi], 0xC1 ; File Name Extension Directory Entry of ExFAT
|
||
jz .longname
|
||
push edi esi
|
||
xchg esi, edi
|
||
; DEBUGF 1, "K : exFAT Volume label dword [ESI]: %x\n", [esi]
|
||
cmp byte [esi], 0x83 ; Indicates that the Volume label exists
|
||
jnz .no_label
|
||
.label:
|
||
; DEBUGF 1, "K : exFAT_get_name.label \n"
|
||
add esi, 2
|
||
lea edi, [ebp+exFAT.volumeLabel]
|
||
|
||
push ecx
|
||
mov ecx, 12
|
||
call UTF16to8_string
|
||
pop ecx
|
||
|
||
; push edi
|
||
; lea edi, [ebp+exFAT.volumeLabel]
|
||
; DEBUGF 1, "K : exFAT Volume label: %s\n", edi
|
||
; pop edi
|
||
.no_label:
|
||
; DEBUGF 1, "K : exFAT_get_name.no_label \n"
|
||
pop esi edi
|
||
.no:
|
||
; DEBUGF 1, "K : exFAT_get_name.no \n"
|
||
stc
|
||
ret
|
||
;--------------------------------------
|
||
.save_curr_sector_number:
|
||
mov eax, [ebp+exFAT.buffer_curr_sector]
|
||
cmp eax, [ebp+exFAT.longname_sector2]
|
||
je @f
|
||
push [ebp+exFAT.longname_sector2]
|
||
pop [ebp+exFAT.longname_sector1]
|
||
mov [ebp+exFAT.longname_sector2], eax
|
||
@@:
|
||
ret
|
||
;--------------------------------------
|
||
.file_directory_entry:
|
||
; DEBUGF 1, "K : exFAT_get_name 0x85\n"
|
||
mov eax, [ebp+exFAT.buffer_curr_sector]
|
||
mov [ebp+exFAT.buff_file_dirsect], eax
|
||
mov [ebp+exFAT.buff_file_dir_pos], edi
|
||
|
||
lea eax, [ebp+exFAT.fname_ext_dir_entry]
|
||
mov [ebp+exFAT.fname_extdir_offset], eax
|
||
|
||
xor eax, eax
|
||
mov [ebp+exFAT.longname_sector1], eax
|
||
mov [ebp+exFAT.longname_sector2], eax
|
||
mov [ebp+exFAT.hash_flag], eax ; dword 0
|
||
mov al, byte [edi+1] ; Number of Secondary directory entries
|
||
dec eax
|
||
mov [ebp+exFAT.secondary_dir_entry], eax
|
||
; DEBUGF 1, "K : exFAT_get_name 0x85 SDE: %x\n", eax
|
||
lea esi, [ebp+exFAT.file_dir_entry]
|
||
; DEBUGF 1, "K : exFAT.file_dir_entry ESI: %x [ESI]: %x\n", esi, [esi]
|
||
jmp @f
|
||
;--------------------------------------
|
||
.stream_extension_directory_entry:
|
||
; DEBUGF 1, "K : exFAT_get_name 0xC0\n"
|
||
; DEBUGF 1, "K : exFAT SEDE need_hash :%x\n", [ebp+exFAT.need_hash]
|
||
call .save_curr_sector_number
|
||
mov eax, [ebp+exFAT.need_hash]
|
||
test eax, eax
|
||
jz .stream_extension_directory_entry_1 ; @f
|
||
movzx eax, word [edi+4] ; hash of the file name
|
||
; DEBUGF 1, "K : exFAT hash 1 :%x\n", eax
|
||
; DEBUGF 1, "K : exFAT hash 2 :%x\n", [ebp+exFAT.current_hash]
|
||
cmp eax, [ebp+exFAT.current_hash]
|
||
je .stream_extension_directory_entry_1 ; @f
|
||
xor eax, eax
|
||
inc eax
|
||
mov [ebp+exFAT.hash_flag], eax ; dword 1
|
||
; DEBUGF 1, "K : exFAT hashes don't match! \n"
|
||
.stream_extension_directory_entry_1:
|
||
lea esi, [ebp+exFAT.str_ext_dir_entry]
|
||
; DEBUGF 1, "K : exFAT.str_ext_dir_entry ESI: %x [ESI]: %x\n", esi, [esi]
|
||
@@:
|
||
push edi
|
||
xchg esi, edi
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
pop edi
|
||
; lea esi, [esp+20]
|
||
|
||
mov esi, [ebp+exFAT.LFN_reserve_place]
|
||
mov word [esi+260*2], 0 ; force null-terminating for orphans
|
||
jmp .no
|
||
;--------------------------------------
|
||
.longname:
|
||
; DEBUGF 1, "K : exFAT_get_name 0xC1\n"
|
||
; push ebp
|
||
; mov ebp,[esp+12+8+4+4+7*4+262*2+4+4]
|
||
; DEBUGF 1, "K : exFAT_get_name.longname 0 Input FS EBP:%x\n", ebp
|
||
; pop ebp
|
||
; DEBUGF 1, "K : exFAT_get_name.longname \n"
|
||
; DEBUGF 1, "K : exFAT_get_name.longname EDI:%x [EDI]:%x ESI:%x [ESI]:%x EBP:%x NAME:%s\n", edi, [edi], esi, [esi], ebp, ebp
|
||
; copy name (15 chars in UTF-16)
|
||
; mov word [esi+260*2], 0 ; force null-terminating for orphans
|
||
|
||
; push ebp
|
||
; mov ebp,[esp+12+8+4+4+7*4+262*2+4+4]
|
||
; DEBUGF 1, "K : exFAT_get_name.longname Input FS EBP:%x\n", ebp
|
||
; pop ebp
|
||
call .save_curr_sector_number
|
||
mov eax, [ebp+exFAT.hash_flag]
|
||
test eax, eax
|
||
jnz .no
|
||
; DEBUGF 1, "K : exFAT_get_name.longname hash match! \n"
|
||
; copy File Name Extension Directory Entry [0xC1] for calculate SetChecksum Field
|
||
lea eax, [ebp+exFAT.fname_ext_dir_entry+32*17]
|
||
cmp eax, [ebp+exFAT.fname_extdir_offset]
|
||
je .no
|
||
|
||
push edi esi
|
||
xchg esi, edi
|
||
mov edi, [ebp+exFAT.fname_extdir_offset]
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
mov [ebp+exFAT.fname_extdir_offset], edi
|
||
pop esi edi
|
||
; copy name
|
||
push edi esi
|
||
xchg esi, edi
|
||
add esi, 2
|
||
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsw
|
||
; force null-terminating for incomplete name
|
||
xor eax, eax
|
||
stosw
|
||
pop esi edi
|
||
|
||
; push ebp
|
||
; mov ebp,[esp+12+8+4+4+7*4+262*2+4+4]
|
||
; DEBUGF 1, "K : exFAT_get_name.longname Output FS EBP:%x\n", ebp
|
||
; pop ebp
|
||
|
||
mov eax, [ebp+exFAT.secondary_dir_entry]
|
||
dec eax
|
||
mov [ebp+exFAT.secondary_dir_entry], eax
|
||
jz @f
|
||
add esi, 30
|
||
; DEBUGF 1, "K : exFAT_get_name 0xC1 CONT\n"
|
||
jmp .no
|
||
; test ax, ax
|
||
; jnz .no ; if this is not first entry, more processing required
|
||
@@:
|
||
; mov esi, [ebp+exFAT.LFN_reserve_place]
|
||
; DEBUGF 1, "K : exFAT_get_name.longname END \n"
|
||
; DEBUGF 1, "K : exFAT_get_name 0xC1 END\n"
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_entry_to_bdfe:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder exFAT_entry_to_bdfe \n"
|
||
; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi
|
||
mov eax, [ebp-4]
|
||
mov [esi+4], eax ; cp866/UNICODE name
|
||
exFAT_entry_to_bdfe2:
|
||
; movzx eax, byte [edi+11]
|
||
movzx eax, byte [edi+4]
|
||
mov [esi], eax ; attributes
|
||
|
||
; movzx eax, word [edi+14]
|
||
movzx eax, word [edi+8]
|
||
call fat_time_to_bdfe
|
||
mov [esi+8], eax ; creation time
|
||
|
||
; movzx eax, word [edi+16]
|
||
movzx eax, word [edi+8+2]
|
||
call fat_date_to_bdfe
|
||
mov [esi+12], eax ; creation date
|
||
|
||
; and dword [esi+16], 0 ; last access time is not supported on FAT
|
||
movzx eax, word [edi+16]
|
||
call fat_time_to_bdfe
|
||
mov [esi+16], eax ; last access time
|
||
|
||
; movzx eax, word [edi+18]
|
||
movzx eax, word [edi+16+2]
|
||
call fat_date_to_bdfe
|
||
mov [esi+20], eax ; last access date
|
||
|
||
; movzx eax, word [edi+22]
|
||
movzx eax, word [edi+12]
|
||
call fat_time_to_bdfe
|
||
mov [esi+24], eax ; last write time
|
||
|
||
; movzx eax, word [edi+24]
|
||
movzx eax, word [edi+12+2]
|
||
call fat_date_to_bdfe
|
||
mov [esi+28], eax ; last write date
|
||
|
||
mov al, [esi]
|
||
test al, 10000b
|
||
jz .file_size
|
||
xor eax, eax
|
||
mov [esi+32], eax ; file size (low dword)
|
||
mov [esi+36], eax ; file size (high dword)
|
||
jmp @f
|
||
.file_size:
|
||
mov eax, [edi+32+8]
|
||
mov [esi+32], eax ; file size (low dword)
|
||
mov eax, [edi+32+8+4]
|
||
mov [esi+36], eax ; file size (high dword)
|
||
@@:
|
||
test ebp, ebp
|
||
jz .ret
|
||
.copy_path:
|
||
add esi, 40
|
||
push edi esi
|
||
mov edi, esi
|
||
mov esi, ebp
|
||
cmp byte [ebp-4], 2
|
||
jz .utf16
|
||
cmp byte [ebp-4], 3
|
||
jz .utf8
|
||
@@:
|
||
lodsw
|
||
call uni2ansi_char
|
||
stosb
|
||
test al, al
|
||
jnz @b
|
||
pop esi edi
|
||
add esi, 264
|
||
.ret:
|
||
; DEBUGF 1, "K : exFAT_entry_to_bdfe +264 ESI:%x\n", esi
|
||
ret
|
||
|
||
.utf8:
|
||
push ecx
|
||
mov ecx, 519
|
||
call UTF16to8_string
|
||
pop ecx
|
||
jmp @f
|
||
|
||
.utf16:
|
||
lodsw
|
||
stosw
|
||
test eax, eax
|
||
jnz .utf16
|
||
@@:
|
||
pop esi edi
|
||
add esi, 520
|
||
; DEBUGF 1, "K : exFAT_entry_to_bdfe +520 ESI:%x\n", esi
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_bdfe_to_fat_entry:
|
||
; convert BDFE at edx to FAT entry at edi
|
||
; destroys eax
|
||
; attributes byte
|
||
; test byte [edi+11], 8 ; volume label?
|
||
; jnz @f
|
||
mov al, [edx]
|
||
; movzx eax, al
|
||
; DEBUGF 1, "K : bdfe file attributes: %x\n", eax
|
||
and al, 0x27
|
||
; and byte [edi+11], 0x10
|
||
; or byte [edi+11], al
|
||
and byte [edi+4], 0x10
|
||
or byte [edi+4], al
|
||
; movzx eax, byte [edi+4]
|
||
; DEBUGF 1, "K : exFAT file attributes: %x\n", eax
|
||
;@@:
|
||
mov eax, [edx+8]
|
||
; DEBUGF 1, "K : bdfe creation time: %x\n", eax
|
||
call bdfe_to_fat_time
|
||
; mov [edi+14], ax ; creation time
|
||
mov [edi+8], ax ; creation time
|
||
; DEBUGF 1, "K : exFAT creation time: %x\n", ax
|
||
|
||
mov eax, [edx+12]
|
||
; DEBUGF 1, "K : bdfe creation date: %x\n", eax
|
||
call bdfe_to_fat_date
|
||
; mov [edi+16], ax ; creation date
|
||
mov [edi+8+2], ax ; creation date
|
||
; DEBUGF 1, "K : exFAT creation date: %x\n", ax
|
||
|
||
mov eax, [edx+16]
|
||
; DEBUGF 1, "K : bdfe access time: %x\n", eax
|
||
call bdfe_to_fat_time
|
||
mov [edi+16], ax ; last access time
|
||
; DEBUGF 1, "K : exFAT access time: %x\n", ax
|
||
|
||
mov eax, [edx+20]
|
||
; DEBUGF 1, "K : bdfe access date: %x\n", eax
|
||
call bdfe_to_fat_date
|
||
; mov [edi+18], ax ; last access date
|
||
mov [edi+16+2], ax ; last access date
|
||
; DEBUGF 1, "K : exFAT access date: %x\n", ax
|
||
|
||
mov eax, [edx+24]
|
||
; DEBUGF 1, "K : bdfe write time: %x\n", eax
|
||
call bdfe_to_fat_time
|
||
; mov [edi+22], ax ; last write time
|
||
mov [edi+12], ax ; last write time
|
||
; DEBUGF 1, "K : exFAT write time: %x\n", ax
|
||
|
||
mov eax, [edx+28]
|
||
; DEBUGF 1, "K : bdfe write date: %x\n", eax
|
||
call bdfe_to_fat_date
|
||
; mov [edi+24], ax ; last write date
|
||
mov [edi+12+2], ax ; last write date
|
||
; DEBUGF 1, "K : exFAT write date: %x\n", ax
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_set_FAT:
|
||
; in: eax = cluster, edx = value to save
|
||
; out: edx = old value, CF=1 -> error
|
||
push eax ebx esi
|
||
cmp eax, 2
|
||
jc .ret
|
||
cmp [ebp+exFAT.LAST_CLUSTER], eax
|
||
jc .ret
|
||
add eax, eax
|
||
@@:
|
||
add eax, eax
|
||
mov esi, 511
|
||
and esi, eax
|
||
shr eax, 9
|
||
add eax, [ebp+exFAT.FAT_START]
|
||
mov ebx, [ebp+exFAT.fat_cache_ptr]
|
||
cmp eax, [ebp+exFAT.fat_in_cache]
|
||
je .inCache
|
||
cmp [ebp+exFAT.fat_change], 0
|
||
je @f
|
||
call exFAT_write_fat_sector
|
||
@@:
|
||
mov [ebp+exFAT.fat_in_cache], eax
|
||
call fs_read32_sys
|
||
test eax, eax
|
||
jne .error
|
||
.inCache:
|
||
mov eax, [ebp+exFAT.fatMASK]
|
||
and edx, eax
|
||
xor eax, -1 ; mask for high bits
|
||
and eax, [ebx+esi] ; get high 4 bits
|
||
or eax, edx
|
||
mov edx, [ebx+esi] ; get old value
|
||
mov [ebx+esi], eax ; save new value
|
||
.write:
|
||
mov [ebp+exFAT.fat_change], 1
|
||
and edx, [ebp+exFAT.fatMASK]
|
||
.ret:
|
||
pop esi ebx eax
|
||
ret
|
||
|
||
.error:
|
||
stc
|
||
jmp .ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_get_FAT:
|
||
; DEBUGF 1, "K : exFAT_get_FAT \n"
|
||
; in: eax = cluster
|
||
; out: eax = next cluster, CF=1 -> error
|
||
push ebx esi
|
||
; cmp [ebp+FAT.fs_type], 12
|
||
; je .FAT12
|
||
; cmp [ebp+FAT.fs_type], 16
|
||
; je @f
|
||
; add eax, eax
|
||
;@@:
|
||
; add eax, eax
|
||
shl eax, 2
|
||
mov esi, 511
|
||
and esi, eax
|
||
shr eax, 9
|
||
add eax, [ebp+exFAT.FAT_START]
|
||
mov ebx, [ebp+exFAT.fat_cache_ptr]
|
||
cmp eax, [ebp+exFAT.fat_in_cache]
|
||
je .inCache
|
||
cmp [ebp+exFAT.fat_change], 0
|
||
je @f
|
||
call exFAT_write_fat_sector
|
||
@@:
|
||
mov [ebp+exFAT.fat_in_cache], eax
|
||
call fs_read32_sys
|
||
test eax, eax
|
||
jnz .error
|
||
.inCache:
|
||
; DEBUGF 1, "K : exFAT_get_FAT.inCache \n"
|
||
mov eax, [ebx+esi]
|
||
and eax, [ebp+exFAT.fatMASK]
|
||
.ret:
|
||
pop esi ebx
|
||
ret
|
||
|
||
.error:
|
||
; DEBUGF 1, "K : exFAT_get_FAT.error \n"
|
||
stc
|
||
jmp .ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_hd_find_lfn:
|
||
; DEBUGF 1, "K : exFAT_hd_find_lfn path ESI: %s\n", esi
|
||
; in: esi -> path string in UTF-8
|
||
; out: CF=1 - file not found, eax=error code
|
||
; else CF=0 and edi->direntry, eax=sector
|
||
push esi edi
|
||
push 0
|
||
push 0
|
||
push exFAT_notroot_first ; 0 ; fat1x_root_first
|
||
push exFAT_notroot_next ; 0 ; fat1x_root_next
|
||
xor eax, eax
|
||
mov [ebp+exFAT.General_Sec_Flags], eax
|
||
mov dword [ebp+exFAT.valid_data_length], 0xffffffff ; for ROOT
|
||
mov eax, [ebp+exFAT.ROOT_CLUSTER]
|
||
; mov [ebp+exFAT.secondary_dir_entry], dword 1
|
||
; cmp [ebp+FAT.fs_type], 32
|
||
; jz .fat32
|
||
jmp @f ; .fat32
|
||
.loop:
|
||
and [ebp+exFAT.longname_sec1], 0
|
||
and [ebp+exFAT.longname_sec2], 0
|
||
|
||
; push ebp
|
||
; mov ebp,[esp+12+8+4+4+7*4]
|
||
; DEBUGF 1, "K : exFAT_find_lfn Input FS EBP:%x\n", ebp
|
||
; pop ebp
|
||
|
||
call exFAT_find_lfn
|
||
|
||
; push ebp
|
||
; mov ebp,[esp+12+8+4+4+7*4]
|
||
; DEBUGF 1, "K : exFAT_find_lfn Output FS EBP:%x\n", ebp
|
||
; pop ebp
|
||
|
||
jc .notfound
|
||
; DEBUGF 1, "K : exFAT_hd_find_lfn [ESI]: %x\n", [esi]
|
||
cmp byte [esi], 0
|
||
jz .found
|
||
; test byte [edi+11], 10h
|
||
push eax
|
||
lea eax, [ebp+exFAT.file_dir_entry]
|
||
; DEBUGF 1, "K : exFAT_hd_find_lfn exFAT.file_dir_entry [EAX]: %x\n", [eax]
|
||
test byte [eax+4], 10000b
|
||
pop eax
|
||
jz .notfound
|
||
and dword [esp+12], 0
|
||
; this entry’s first cluster number
|
||
; mov eax, [edi+20-2]
|
||
; mov ax, [edi+26] ; cluster
|
||
lea eax, [ebp+exFAT.str_ext_dir_entry]
|
||
|
||
push eax
|
||
movzx eax, byte [eax+1]
|
||
mov [ebp+exFAT.General_Sec_Flags], eax
|
||
; DEBUGF 1, "K : exFAT General_Sec_Flags %x\n", eax
|
||
mov eax, [esp]
|
||
mov eax, [eax+8] ; LOW dword of Valid data length - WARNING!!! late rewrite
|
||
mov [ebp+exFAT.valid_data_length], eax
|
||
; DEBUGF 1, "K : exFAT.valid_data_length 1 %x\n", eax
|
||
pop eax
|
||
|
||
mov eax, [eax+20] ; cluster
|
||
;.fat32:
|
||
@@:
|
||
; DEBUGF 1, "K : exFAT_hd_find_lfn exFAT cluster EAX: %x\n", eax
|
||
mov [esp+8], eax
|
||
; mov dword [esp+4], exFAT_notroot_first ; fat_notroot_first
|
||
; mov dword [esp], exFAT_notroot_next ; fat_notroot_next
|
||
jmp .loop
|
||
|
||
.notfound:
|
||
; DEBUGF 1, "K : exFAT_hd_find_lfn.notfound EAX:%x\n", eax
|
||
add esp, 16
|
||
pop edi esi
|
||
stc
|
||
ret
|
||
|
||
.found:
|
||
; DEBUGF 1, "K : exFAT_hd_find_lfn.found \n"
|
||
lea eax, [esp+8]
|
||
cmp dword [eax], 0
|
||
jz .root
|
||
call exFAT_get_sector
|
||
jmp .cmn
|
||
|
||
.root:
|
||
; DEBUGF 1, "K : exFAT_hd_find_lfn.found.root \n"
|
||
mov eax, [eax+4]
|
||
add eax, [ebp+exFAT.ROOT_START]
|
||
.cmn:
|
||
; DEBUGF 1, "K : exFAT_hd_find_lfn.found.cmn \n"
|
||
add esp, 20 ; CF=0
|
||
pop esi
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_find_lfn:
|
||
; DEBUGF 1, "K : exFAT_find_lfn \n"
|
||
; in:
|
||
; esi -> path in UTF-8
|
||
; parameters in the stack
|
||
; out:
|
||
; esi -> next name in the path
|
||
; edi -> direntry
|
||
; CF=1 -> file not found, eax = error code
|
||
xor eax, eax
|
||
inc eax
|
||
mov [ebp+exFAT.secondary_dir_entry], eax ; dword 1
|
||
mov [ebp+exFAT.need_hash], eax ; dword 1
|
||
lea eax, [esp+12]
|
||
call dword [eax-4] ; exFAT_notroot_first
|
||
jc .reterr
|
||
sub esp, 262*2 ; reserve place for LFN
|
||
; lea eax, [esp]
|
||
mov eax, esp
|
||
mov [ebp+exFAT.LFN_reserve_place], eax
|
||
mov [ebp+exFAT.path_in_UTF8], esi
|
||
; DEBUGF 1, "K : exFAT_find_lfn Path: %s\n", esi
|
||
; DEBUGF 1, "K : exFAT Path: %s\n", esi
|
||
; DEBUGF 1, "K : exFAT Path1: %x %x %x\n", [esi], [esi+4], [esi+8]
|
||
push esi edi
|
||
; lea edi, [esp+8]
|
||
mov edi, eax
|
||
align 4
|
||
@@:
|
||
; in: esi -> UTF-8 char (increasing)
|
||
; out: ax = UTF-16 char
|
||
call utf8to16
|
||
call utf16toUpper
|
||
stosw
|
||
test ax, ax
|
||
jz @f
|
||
cmp ax, word 0x002f ; "/"
|
||
jne @b
|
||
@@:
|
||
; mov [edi-2], dword 0
|
||
mov esi, [ebp+exFAT.LFN_reserve_place]
|
||
; DEBUGF 1, "K : exFAT Path2: %x %x %x\n", [esi], [esi+4], [esi+8]
|
||
push ebx ecx
|
||
mov ecx, edi
|
||
sub ecx, esi
|
||
sub ecx, 2 ; correction for zero or "/"
|
||
; exFAT_hash_calculate
|
||
; in:
|
||
; esi -> NameUTF16
|
||
; ecx -> NameUTF16 length
|
||
; out: ax = hash
|
||
xor eax, eax
|
||
xor ebx, ebx
|
||
;--------------------------------------
|
||
align 4
|
||
.start:
|
||
; DEBUGF 1, "Hash start EAX:%x ECX:%x\n", eax, ecx
|
||
mov bx, ax
|
||
; (Hash&1) ? 0x8000 : 0)
|
||
and ax, 0x1
|
||
jz .else
|
||
|
||
mov ax, 0x8000
|
||
jmp @f
|
||
;--------------------------------------
|
||
.else:
|
||
xor ax, ax
|
||
;--------------------------------------
|
||
@@:
|
||
; DEBUGF 1, "(Hash&1) EAX:%x\n", eax
|
||
; (Hash>>1)
|
||
shr bx, 1
|
||
; DEBUGF 1, "(Hash>>1) EBX:%x\n", ebx
|
||
add ax, bx
|
||
; DEBUGF 1, "+ (Hash>>1)) EAX:%x\n", eax
|
||
movzx bx, byte [esi]
|
||
add ax, bx
|
||
; DEBUGF 1, "+ (UInt16)Buffer[Index] EAX:%x\n", eax
|
||
inc esi
|
||
dec ecx
|
||
jnz .start
|
||
;--------------------------------------
|
||
pop ecx ebx
|
||
mov [ebp+exFAT.current_hash], eax
|
||
; DEBUGF 1, "K : exFAT current hash :%x\n", eax
|
||
pop edi esi
|
||
.l1:
|
||
; push esi
|
||
; lea esi, [esp+4]
|
||
; mov esi, [ebp+exFAT.LFN_reserve_place]
|
||
; DEBUGF 1, "K : exFAT_find_lfn.exFAT_get_name \n"
|
||
|
||
; push ebp
|
||
; mov ebp,[esp+12+8+4+4+7*4+262*2+4]
|
||
; DEBUGF 1, "K : exFAT_get_name Input FS EBP:%x\n", ebp
|
||
; pop ebp
|
||
; DEBUGF 1, "K : exFAT FL need_hash :%x\n", [ebp+exFAT.need_hash]
|
||
call exFAT_get_name
|
||
; mov [ebp+exFAT.LFN_reserve_place], esi
|
||
; pop esi
|
||
|
||
; push ebp
|
||
; mov ebp,[esp+12+8+4+4+7*4+262*2+4]
|
||
; DEBUGF 1, "K : exFAT_get_name Output FS EBP:%x\n", ebp
|
||
; pop ebp
|
||
|
||
jc .no
|
||
|
||
; push eax
|
||
xor eax, eax
|
||
cmp [ebp+exFAT.secondary_dir_entry], eax
|
||
; pop eax
|
||
jnz .no
|
||
|
||
push edi esi
|
||
mov esi, [ebp+exFAT.path_in_UTF8]
|
||
lea edi, [esp+8]
|
||
@@:
|
||
call utf8to16
|
||
call utf16toUpper
|
||
mov edx, eax
|
||
mov ax, [edi]
|
||
call utf16toUpper
|
||
cmp ax, dx
|
||
jnz .done
|
||
add edi, 2
|
||
test ax, ax
|
||
jnz @b
|
||
dec esi
|
||
pop eax edi
|
||
.found:
|
||
; DEBUGF 1, "K : exFAT_find_lfn.found \n"
|
||
add esp, 262*2
|
||
; if this is LFN entry, advance to true entry
|
||
; cmp byte [edi+11], 0xF
|
||
; jnz @f
|
||
xor eax, eax
|
||
cmp [ebp+exFAT.secondary_dir_entry], eax
|
||
jz @f
|
||
lea eax, [esp+12]
|
||
call dword[eax-8] ; exFAT_notroot_next
|
||
jc .reterr
|
||
@@:
|
||
; DEBUGF 1, "K : exFAT_find_lfn.OK \n"
|
||
xor eax, eax
|
||
ret
|
||
|
||
.done:
|
||
; DEBUGF 1, "K : exFAT_find_lfn.done \n"
|
||
cmp dx, '/'
|
||
jnz @f
|
||
test ax, ax
|
||
jnz @f
|
||
mov [esp], esi
|
||
@@:
|
||
pop esi edi
|
||
jz .found
|
||
.no:
|
||
; DEBUGF 1, "K : exFAT_find_lfn.no \n"
|
||
lea eax, [esp+262*2+12]
|
||
; DEBUGF 1, "K : exFAT General_Sec_Flags %x\n", [ebp+exFAT.General_Sec_Flags]
|
||
; DEBUGF 1, "K : exFAT.valid_data_length 2 %x\n", [ebp+exFAT.valid_data_length]
|
||
cmp [ebp+exFAT.valid_data_length], 0
|
||
jbe .error
|
||
; DEBUGF 1, "K : exFAT_find_lfn call dword[eax-8] ; exFAT_notroot_next: \n"
|
||
call dword[eax-8] ; exFAT_notroot_next
|
||
jnc .l1
|
||
@@:
|
||
; DEBUGF 1, "K : exFAT_find_lfn.@@: \n"
|
||
add esp, 262*2
|
||
.reterr:
|
||
; DEBUGF 1, "K : exFAT_find_lfn.reterr \n"
|
||
stc
|
||
ret
|
||
.error:
|
||
movi eax, ERROR_FILE_NOT_FOUND
|
||
jmp @b
|
||
;------------------------------------------------------------------------------
|
||
exFAT_ReadFile:
|
||
; DEBUGF 1, "K : exFAT_ReadFile \n"
|
||
; DEBUGF 1, "K : exFAT F70 +00: %x\n", [ebx]
|
||
; DEBUGF 1, "K : exFAT F70 +04: %x\n", [ebx+4]
|
||
; DEBUGF 1, "K : exFAT F70 +08: %x\n", [ebx+8]
|
||
; DEBUGF 1, "K : exFAT F70 +12: %x\n", [ebx+12]
|
||
; DEBUGF 1, "K : exFAT F70 +16: %x\n", [ebx+16]
|
||
; DEBUGF 1, "K : exFAT F70 +20: %x\n", [ebx+20]
|
||
; DEBUGF 1, "K : exFAT Path: %s\n", esi
|
||
|
||
; push eax
|
||
; pushfd
|
||
; pop eax
|
||
; DEBUGF 1, "K : eFlags:%x\n",eax
|
||
; pop eax
|
||
; DEBUGF 1, "K : EAX:%x EBX:%x ECX:%x EDX:%x\n", eax, ebx, ecx, edx
|
||
; DEBUGF 1, "K : EBP:%x ESI:%x EDI:%x\n", ebp, esi, edi
|
||
; in:
|
||
; ebx -> parameter structure of sysfunc 70
|
||
; ebp -> exFAT structure
|
||
; esi -> path string in UTF-8
|
||
; out:
|
||
; eax, ebx = return values for sysfunc 70
|
||
call exFAT_lock
|
||
xor eax, eax
|
||
mov [ebp+exFAT.need_hash], eax ; dword 0
|
||
mov [ebp+exFAT.hash_flag], eax ; dword 0
|
||
call exFAT_hd_find_lfn
|
||
jc .notFound
|
||
; test byte [edi+11], 0x10 ; do not allow read directories
|
||
; jnz .noaccess
|
||
lea eax, [ebp+exFAT.file_dir_entry]
|
||
test byte [eax+4], 10000b ; do not allow read directories
|
||
jnz .noaccess
|
||
; Rewrite code to work with more than 4 GB files !!!
|
||
; cmp dword [ebx+8], 0
|
||
; jnz .endOfFile
|
||
|
||
mov edx, [ebx+8] ; file offset high
|
||
; DEBUGF 1, "K : exFAT_ReadFile Hdword file offset EDX:%x\n", edx
|
||
mov [ebp+exFAT.RDX_high], edx
|
||
mov edx, [ebx+4] ; file offset low
|
||
; DEBUGF 1, "K : exFAT_ReadFile Ldword file offset EAX:%x\n", edx
|
||
|
||
mov ecx, [ebx+12] ; size
|
||
mov ebx, [ebx+16] ; buffer
|
||
push ebx
|
||
push 0
|
||
test ecx, ecx ; read size 0?
|
||
jz .done
|
||
|
||
; mov eax, [edi+28] ; real file size
|
||
lea eax, [ebp+exFAT.str_ext_dir_entry]
|
||
; DEBUGF 1, "K : exFAT 0xC0 +00: %x\n", [eax]
|
||
; DEBUGF 1, "K : exFAT 0xC0 +04: %x\n", [eax+4]
|
||
; DEBUGF 1, "K : exFAT 0xC0 +08: %x\n", [eax+8]
|
||
; DEBUGF 1, "K : exFAT 0xC0 +12: %x\n", [eax+12]
|
||
; DEBUGF 1, "K : exFAT 0xC0 +16: %x\n", [eax+16]
|
||
; DEBUGF 1, "K : exFAT 0xC0 +20: %x\n", [eax+20]
|
||
; DEBUGF 1, "K : exFAT 0xC0 +24: %x\n", [eax+24]
|
||
; DEBUGF 1, "K : exFAT 0xC0 +28: %x\n", [eax+28]
|
||
push eax
|
||
movzx eax, byte [eax+1]
|
||
mov [ebp+exFAT.General_Sec_Flags], eax
|
||
pop eax
|
||
|
||
push eax
|
||
mov eax, [eax+12] ; high dword of real file size
|
||
mov [ebp+exFAT.RAX_high], eax
|
||
; DEBUGF 1, "K : exFAT_ReadFile Hdword file size EAX:%x\n", eax
|
||
pop eax
|
||
|
||
mov eax, [eax+8] ; low dword of real file size
|
||
; DEBUGF 1, "K : exFAT_ReadFile Ldword file size EAX:%x\n", eax
|
||
|
||
; sub eax, edx ; low dword file size - file offset low = rest of file
|
||
; jb .fileEnd
|
||
sub eax, edx ; low dword file size - file offset low = rest of file
|
||
push eax
|
||
mov eax, [ebp+exFAT.RDX_high]
|
||
sbb [ebp+exFAT.RAX_high], eax
|
||
pop eax
|
||
jb .fileEnd
|
||
; DEBUGF 1, "K : exFAT_ReadFile Hdword rest of file RAX:%x\n", [ebp+exFAT.RAX_high]
|
||
; DEBUGF 1, "K : exFAT_ReadFile Ldword rest of file EAX:%x\n", eax
|
||
|
||
push eax
|
||
mov eax, [ebp+exFAT.RAX_high]
|
||
test eax, eax
|
||
pop eax
|
||
jnz @f
|
||
|
||
cmp eax, ecx ; rest of file - requested size
|
||
jae @f
|
||
|
||
; DEBUGF 1, "K : exFAT_ReadFile 6=EOF EAX:%x ECX:%x EDX:%x\n", eax, ecx, edx
|
||
mov ecx, eax
|
||
mov byte [esp], 6 ; 6 = end of file, EOF
|
||
@@:
|
||
lea eax, [ebp+exFAT.str_ext_dir_entry]
|
||
mov eax, [eax+20] ; cluster
|
||
; DEBUGF 1, "K : exFAT EAX:%x EBX:%x ECX:%x EDX:%x\n", eax, ebx, ecx, edx
|
||
; now eax=cluster, ebx=buffer for data, ecx=count, edx=position
|
||
mov edi, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
shl edi, 9 ; bytes per cluster
|
||
@@:
|
||
cmp eax, 2
|
||
jb .fileEnd
|
||
.continue_1:
|
||
cmp eax, [ebp+exFAT.fatRESERVED]
|
||
jae .fileEnd
|
||
|
||
push eax
|
||
xor eax, eax
|
||
sub edx, edi ; file_offset_low - bytes per cluster
|
||
sbb [ebp+exFAT.RDX_high], eax
|
||
pop eax
|
||
jc @f
|
||
|
||
; push edi
|
||
; lea edi, [ebp+exFAT.file_dir_entry]
|
||
; Check - General Secondary Flags
|
||
; Bit 0 : Allocation possible
|
||
; 0 – No cluster allocated; 1 – cluster allocation is possible
|
||
; Bit 1 : No FAT chain
|
||
; 0 – Yes ; The clusters of this file/directory are NOT contiguous
|
||
; 1 – No; The Contiguous Cluster are allocated to this file/directory;
|
||
; This improves the File read performance
|
||
; Bits 2 – 7 : Reserved
|
||
; test byte [edi+1], 11b
|
||
; pop edi
|
||
test byte [ebp+exFAT.General_Sec_Flags], 10b
|
||
jz .get_FAT_1
|
||
inc eax
|
||
jmp .continue_1
|
||
.get_FAT_1:
|
||
|
||
call exFAT_get_FAT
|
||
jc .noaccess2
|
||
|
||
jmp @b
|
||
|
||
.notFound:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.notFound: \n"
|
||
push eax
|
||
jmp .ret
|
||
|
||
.noaccess:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.noaccess \n"
|
||
push ERROR_ACCESS_DENIED
|
||
jmp .ret
|
||
|
||
.endOfFile:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.endOfFile \n"
|
||
push ERROR_END_OF_FILE
|
||
.ret:
|
||
call exFAT_unlock
|
||
pop eax
|
||
xor ebx, ebx
|
||
; DEBUGF 1, "K : exFAT_ReadFile Return EBX:%x\n", ebx
|
||
ret
|
||
|
||
@@:
|
||
; DEBUGF 1, "K : exFAT_ReadFile CONTINUE cluster EAX:%x\n", eax
|
||
mov esi, eax
|
||
dec eax
|
||
dec eax
|
||
|
||
push ebx edx
|
||
xor edx, edx
|
||
; DEBUGF 1, "K : exFAT_ReadFile IMUL in EDX:%x EAX:%x\n", EDX, eax
|
||
imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER] ; Sector edx:eax
|
||
; DEBUGF 1, "K : exFAT_ReadFile IMUL out EDX:%x EAX:%x\n", EDX, eax
|
||
xor ebx, ebx
|
||
add eax, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
adc edx, ebx
|
||
mov [ebp+exFAT.RAX_high], edx
|
||
pop edx ebx
|
||
; DEBUGF 1, "K : exFAT_ReadFile start sector RAX_H:%x EAX:%x RDX_H:%x EDX:%x EDI:%x\n", [ebp+exFAT.RAX_high], eax, [ebp+exFAT.RDX_high], edx, edi
|
||
push eax
|
||
xor eax, eax
|
||
add edx, edi ; file offset low + bytes per cluster
|
||
adc [ebp+exFAT.RDX_high], eax
|
||
pop eax
|
||
|
||
test edx, edx
|
||
jz .alignedCluster
|
||
|
||
mov edi, edx ; file offset low
|
||
push eax
|
||
mov eax, [ebp+exFAT.RDX_high]
|
||
mov [ebp+exFAT.RDI_high], eax
|
||
pop eax
|
||
|
||
; shr edi, 9
|
||
push ebx
|
||
mov ebx, [ebp+exFAT.RDI_high]
|
||
shrd edi, ebx, 5 ; /32
|
||
shr ebx, 5 ; /32
|
||
shrd edi, ebx, 4 ; /16
|
||
shr ebx, 4 ; /16
|
||
mov [ebp+exFAT.RDI_high], ebx
|
||
pop ebx
|
||
|
||
add eax, edi ; RFile_start_sector_low - file_sector_offset_low
|
||
push ebx
|
||
mov ebx, [ebp+exFAT.RDI_high]
|
||
adc [ebp+exFAT.RAX_high], ebx
|
||
pop ebx
|
||
|
||
and edx, 511
|
||
and dword [ebp+exFAT.RDX_high], 0
|
||
|
||
cmp ecx, 512
|
||
jc .sectorPiece
|
||
test edx, edx
|
||
jz .alignedSector
|
||
.sectorPiece:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.sectorPiece \n"
|
||
push eax ebx ecx edx
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
mov edx, [ebp+exFAT.RAX_high]
|
||
xor ecx, ecx
|
||
inc ecx
|
||
; DEBUGF 1, "K : exFAT fs_read64_app EDX:%x EAX:%x ECX:%x EBX:%x EBP:%x\n", edx, eax, ecx, ebx, ebp
|
||
; call fs_read32_app
|
||
call fs_read64_app
|
||
; DEBUGF 1, "K : exFAT fs_read64_app Output EAX:%x ECX:%x EBX:%x\n", eax, ecx, ebx
|
||
test eax, eax
|
||
; lea eax, [ebp+exFAT.buffer]
|
||
mov eax, ebx ; exFAT.buffer
|
||
pop edx ecx ebx
|
||
jne .noaccess3
|
||
; DEBUGF 1, "K : exFAT_ReadFile memmove(-1) EAX:%x EBX:%x ECX:%x EDX:%x\n", eax, ebx, ecx, edx
|
||
add eax, edx ; exFAT.buffer + offset within a sector
|
||
push ecx
|
||
add ecx, edx ; requested size + offset within a sector
|
||
cmp ecx, 512
|
||
jbe @f
|
||
mov ecx, 512
|
||
@@:
|
||
sub ecx, edx ; requested size - offset within a sector
|
||
; DEBUGF 1, "K : exFAT_ReadFile memmove EAX:%x EBX:%x ECX:%x\n", eax, ebx, ecx
|
||
; eax = from
|
||
; ebx = to
|
||
; ecx = no of bytes
|
||
call memmove
|
||
; DEBUGF 1, "K : exFAT_ReadFile memmove(1) EAX:%x EBX:%x ECX:%x\n", eax, ebx, ecx
|
||
sub [esp], ecx
|
||
add ebx, ecx
|
||
; DEBUGF 1, "K : exFAT_ReadFile memmove(2) EAX:%x EBX:%x ECX:%x\n", eax, ebx, ecx
|
||
pop ecx eax
|
||
xor edx, edx
|
||
; inc edi ; file_sector_offset_low
|
||
push eax
|
||
xor eax, eax
|
||
add edi, 1 ; you cannot use INC EDI for qword!!!
|
||
adc [ebp+exFAT.RDI_high], eax
|
||
pop eax
|
||
; inc eax ; RFile_start_sector_low
|
||
push ebx
|
||
xor ebx, ebx
|
||
add eax, 1 ; you cannot use INC EAX for qword!!!
|
||
adc [ebp+exFAT.RAX_high], ebx
|
||
pop ebx
|
||
test ecx, ecx
|
||
jz .done
|
||
.alignedSector:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.alignedSector \n"
|
||
; shl edi, 9 ; RFile_start_sector_low * 512
|
||
push ebx
|
||
mov ebx, [ebp+exFAT.RDI_high]
|
||
shld ebx, edi, 5 ; *32
|
||
shl edi, 5 ; *32
|
||
shld ebx, edi, 4 ; *16
|
||
shl edi, 4 ; *16
|
||
mov [ebp+exFAT.RDI_high], ebx
|
||
pop ebx
|
||
|
||
push ebx
|
||
xor ebx, ebx
|
||
mov [ebp+exFAT.RCX_high], ebx
|
||
add ecx, edi ; requested size + file_offset_low
|
||
mov ebx, [ebp+exFAT.RDI_high]
|
||
adc [ebp+exFAT.RCX_high], ebx
|
||
pop ebx
|
||
|
||
xor edi, edi
|
||
mov [ebp+exFAT.RDI_high], edi
|
||
mov edi, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
shl edi, 9 ; bytes per cluster
|
||
.alignedCluster:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.alignedCluster RAX_H:%x EAX:%x RDX_H:%x EDX:%x EDI:%x\n", [ebp+exFAT.RAX_high], eax, [ebp+exFAT.RDX_high], edx, edi
|
||
cmp ecx, 512
|
||
jc .sectorPiece
|
||
mov edx, [ebp+exFAT.RAX_high]
|
||
mov [ebp+exFAT.RDX_high], edx
|
||
mov edx, eax ; edx << RFile_start_sector_low
|
||
|
||
xor eax, eax
|
||
mov [ebp+exFAT.RAX_high], eax
|
||
mov eax, esi ; eax << cluster
|
||
@@:
|
||
push eax
|
||
xor eax, eax
|
||
sub ecx, edi ; requested size low - bytes per cluster
|
||
sbb [ebp+exFAT.RCX_high], eax
|
||
pop eax
|
||
jbe .readEnd
|
||
|
||
; push edi
|
||
; lea edi, [ebp+exFAT.file_dir_entry]
|
||
; Check - General Secondary Flags
|
||
; Bit 0 : Allocation possible
|
||
; 0 – No cluster allocated; 1 – cluster allocation is possible
|
||
; Bit 1 : No FAT chain
|
||
; 0 – Yes ; The clusters of this file/directory are NOT contiguous
|
||
; 1 – No; The Contiguous Cluster are allocated to this file/directory;
|
||
; This improves the File read performance
|
||
; Bits 2 – 7 : Reserved
|
||
; test byte [edi+1], 11b
|
||
; pop edi
|
||
test byte [ebp+exFAT.General_Sec_Flags], 10b
|
||
jz .get_FAT
|
||
inc eax ; inc cluster
|
||
jmp .continue
|
||
.get_FAT:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.get_FAT \n"
|
||
call exFAT_get_FAT
|
||
jc .noaccess4
|
||
cmp eax, 2
|
||
jb .fileEnd2
|
||
.continue:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.continue \n"
|
||
cmp eax, [ebp+exFAT.fatRESERVED]
|
||
jae .fileEnd2
|
||
|
||
inc esi ; inc cluster
|
||
cmp eax, esi
|
||
jz @b
|
||
.fragmentEnd:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.fragmentEnd \n"
|
||
xchg eax, esi
|
||
dec eax
|
||
dec eax
|
||
|
||
push ebx edx
|
||
xor edx, edx
|
||
imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER] ; Sector edx:eax
|
||
xor ebx, ebx
|
||
add eax, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
adc edx, ebx
|
||
mov [ebp+exFAT.RAX_high], edx
|
||
pop edx ebx
|
||
|
||
push dword [ebp+exFAT.RCX_high]
|
||
push ecx ; requested size low
|
||
|
||
mov ecx, [ebp+exFAT.RAX_high]
|
||
mov [ebp+exFAT.RCX_high], ecx
|
||
mov ecx, eax ; ecx << RFile_start_sector_low
|
||
|
||
xor eax, eax
|
||
mov [ebp+exFAT.RAX_high], eax
|
||
mov eax, esi ; eax << custer
|
||
|
||
dec eax
|
||
dec eax
|
||
|
||
push ebx edx
|
||
xor edx, edx
|
||
imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER] ; Sector edx:eax
|
||
xor ebx, ebx
|
||
add eax, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
adc edx, ebx
|
||
mov [ebp+exFAT.RAX_high], edx
|
||
pop edx ebx
|
||
|
||
push dword [ebp+exFAT.RAX_high]
|
||
push eax
|
||
.readFragment:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.readFragment \n"
|
||
push eax
|
||
mov eax, [ebp+exFAT.RDX_high]
|
||
sub ecx, edx ; RFile_start_sector_low - RFile_start_sector_low
|
||
sbb [ebp+exFAT.RCX_high], eax
|
||
pop eax
|
||
|
||
mov eax, edx
|
||
; xor edx, edx
|
||
mov edx, [ebp+exFAT.RDX_high]
|
||
|
||
; DEBUGF 1, "K : exFAT fs_read64_app EDX:%x EAX:%x ECX:%x EBX:%x EBP:%x\n", edx, eax, ecx, ebx, ebp
|
||
call fs_read64_app
|
||
; DEBUGF 1, "K : exFAT fs_read64_app Output EAX:%x ECX:%x EBX:%x\n", eax, ecx, ebx
|
||
; shl ecx, 9
|
||
push ebx
|
||
mov ebx, [ebp+exFAT.RCX_high]
|
||
shld ebx, ecx, 5 ; *32
|
||
shl ecx, 5 ; *32
|
||
shld ebx, ecx, 4 ; *16
|
||
shl ecx, 4 ; *16
|
||
mov [ebp+exFAT.RCX_high], ebx
|
||
pop ebx
|
||
|
||
add ebx, ecx
|
||
|
||
test eax, eax
|
||
pop eax
|
||
pop dword [ebp+exFAT.RAX_high]
|
||
jnz .noaccess3
|
||
pop ecx
|
||
pop dword [ebp+exFAT.RCX_high]
|
||
xor edx, edx
|
||
mov [ebp+exFAT.RDX_high], edx
|
||
jecxz .done_1
|
||
jmp .alignedCluster
|
||
.done_1:
|
||
jmp .done
|
||
|
||
.readEnd:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.readEnd \n"
|
||
push ebx
|
||
add ecx, edi ; requested size + bytes per cluster
|
||
mov ebx, [ebp+exFAT.RDI_high]
|
||
adc [ebp+exFAT.RCX_high], ebx
|
||
pop ebx
|
||
|
||
mov edi, [ebp+exFAT.RCX_high]
|
||
mov [ebp+exFAT.RDI_high], edi
|
||
mov edi, ecx
|
||
|
||
and ecx, 511
|
||
and dword [ebp+exFAT.RCX_high], 0
|
||
; shr edi, 9
|
||
push ebx
|
||
mov ebx, [ebp+exFAT.RDI_high]
|
||
shrd edi, ebx, 5 ; /32
|
||
shr ebx, 5 ; /32
|
||
shrd edi, ebx, 4 ; /16
|
||
shr ebx, 4 ; /16
|
||
mov [ebp+exFAT.RDI_high], ebx
|
||
pop ebx
|
||
|
||
dec eax
|
||
dec eax
|
||
|
||
push ebx edx
|
||
xor edx, edx
|
||
imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER] ; Sector edx:eax
|
||
xor ebx, ebx
|
||
add eax, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
adc edx, ebx
|
||
mov [ebp+exFAT.RAX_high], edx
|
||
pop edx ebx
|
||
|
||
add eax, edi ; RFile_start_sector_low - file_sector_offset_low
|
||
push ebx
|
||
mov ebx, [ebp+exFAT.RDI_high]
|
||
adc [ebp+exFAT.RAX_high], ebx
|
||
pop ebx
|
||
|
||
push dword [ebp+exFAT.RCX_high]
|
||
push ecx
|
||
|
||
push dword [ebp+exFAT.RAX_high]
|
||
push eax
|
||
|
||
mov ecx, [ebp+exFAT.RAX_high]
|
||
mov [ebp+exFAT.RCX_high], ecx
|
||
mov ecx, eax
|
||
jmp .readFragment
|
||
|
||
.noaccess3:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.noaccess3 \n"
|
||
pop eax
|
||
pop dword [ebp+exFAT.RAX_high]
|
||
.noaccess2:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.noaccess2 \n"
|
||
mov byte [esp], ERROR_DEVICE
|
||
.done:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.done \n"
|
||
call exFAT_unlock
|
||
pop eax edx
|
||
sub ebx, edx
|
||
; DEBUGF 1, "K : exFAT_ReadFile Return EBX:%x\n", ebx
|
||
|
||
; push eax
|
||
; pushfd
|
||
; pop eax
|
||
; DEBUGF 1, "K : eFlags:%x\n",eax
|
||
; pop eax
|
||
; DEBUGF 1, "K : EAX:%x EBX:%x ECX:%x EDX:%x\n", eax, ebx, ecx, edx
|
||
; DEBUGF 1, "K : EBP:%x ESI:%x EDI:%x\n", ebp, esi, edi
|
||
ret
|
||
|
||
.fileEnd:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.fileEnd \n"
|
||
mov byte [esp], ERROR_END_OF_FILE
|
||
jmp .done
|
||
|
||
.noaccess4:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.noaccess4 \n"
|
||
mov byte [esp], ERROR_DEVICE
|
||
jmp @f
|
||
|
||
.fileEnd2:
|
||
; DEBUGF 1, "K : exFAT_ReadFile.fileEnd2 \n"
|
||
mov byte [esp], ERROR_END_OF_FILE
|
||
@@:
|
||
inc esi
|
||
xor ecx, ecx
|
||
mov [ebp+exFAT.RCX_high], ecx
|
||
jmp .fragmentEnd
|
||
;------------------------------------------------------------------------------
|
||
exFAT_ReadFolder:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder \n"
|
||
; DEBUGF 1, "K : exFAT F70 +00: %x\n", [ebx]
|
||
; DEBUGF 1, "K : exFAT F70 +04: %x\n", [ebx+4]
|
||
; DEBUGF 1, "K : exFAT F70 +08: %x\n", [ebx+8]
|
||
; DEBUGF 1, "K : exFAT F70 +12: %x\n", [ebx+12]
|
||
; DEBUGF 1, "K : exFAT F70 +16: %x\n", [ebx+16]
|
||
; DEBUGF 1, "K : exFAT F70 +20: %x\n", [ebx+20]
|
||
; DEBUGF 1, "K : exFAT Path: %s\n", esi
|
||
; push eax
|
||
; pushfd
|
||
; pop eax
|
||
; DEBUGF 1, "K : eFlags:%x\n",eax
|
||
; pop eax
|
||
; DEBUGF 1, "K : EAX:%x EBX:%x ECX:%x EDX:%x\n", eax, ebx, ecx, edx
|
||
; DEBUGF 1, "K : EBP:%x ESI:%x EDI:%x\n", ebp, esi, edi
|
||
; in:
|
||
; ebx -> parameter structure of sysfunc 70
|
||
; ebp -> exFAT structure
|
||
; esi -> path string in UTF-8
|
||
; out:
|
||
; eax, ebx = return values for sysfunc 70
|
||
call exFAT_lock
|
||
xor eax, eax
|
||
mov [ebp+exFAT.need_hash], eax ; dword 0
|
||
mov [ebp+exFAT.hash_flag], eax ; dword 0
|
||
mov [ebp+exFAT.General_Sec_Flags], eax
|
||
; DEBUGF 1, "K : exFAT_ReadFolder General_Sec_Flags 1 %x\n", eax
|
||
mov eax, [ebp+exFAT.ROOT_CLUSTER]
|
||
; DEBUGF 1, "K : exFAT.ROOT_CLUSTER: %x\n", eax
|
||
cmp byte [esi], 0
|
||
jz .doit
|
||
|
||
; push ebp
|
||
; mov ebp,[esp+12+8+4+4]
|
||
; DEBUGF 1, "K : exFAT Input FS EBP:%x\n", ebp
|
||
; pop ebp
|
||
|
||
call exFAT_hd_find_lfn
|
||
|
||
; push ebp
|
||
; mov ebp,[esp+12+8+4+4]
|
||
; DEBUGF 1, "K : exFAT Output FS EBP:%x\n", ebp
|
||
; pop ebp
|
||
|
||
jc .error
|
||
; jmp .error
|
||
; test byte [edi+11], 0x10 ; do not allow read files
|
||
; jz .accessDenied
|
||
xor eax, eax
|
||
mov [ebp+exFAT.need_hash], eax ; dword 0
|
||
mov [ebp+exFAT.hash_flag], eax ; dword 0
|
||
lea eax, [ebp+exFAT.file_dir_entry]
|
||
test byte [eax+4], 10000b ; do not allow read files
|
||
jz .accessDenied
|
||
; mov eax, [edi+20-2]
|
||
; mov ax, [edi+26] ; eax=cluster
|
||
lea eax, [ebp+exFAT.str_ext_dir_entry]
|
||
push eax
|
||
movzx eax, byte [eax+1]
|
||
mov [ebp+exFAT.General_Sec_Flags], eax
|
||
; DEBUGF 1, "K : exFAT_ReadFolder General_Sec_Flags 2 %x\n", eax
|
||
mov eax, [esp]
|
||
mov eax, [eax+8] ; LOW dword of Valid data length - WARNING!!! late rewrite
|
||
mov [ebp+exFAT.valid_data_length], eax
|
||
pop eax
|
||
mov eax, [eax+20] ; cluster
|
||
jmp .doit_1
|
||
.doit:
|
||
mov dword [ebp+exFAT.valid_data_length], 0xffffffff ; for ROOT
|
||
.doit_1:
|
||
; DEBUGF 1, "K : exFAT.valid_data_length %x\n", [ebp+exFAT.valid_data_length]
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.doit \n"
|
||
sub esp, 262*2 ; reserve space for LFN
|
||
push dword [ebx+8] ; cp866/UNICODE name
|
||
mov edx, [ebx+16] ; pointer to buffer
|
||
; init header
|
||
push eax
|
||
mov edi, edx
|
||
mov ecx, 32/4
|
||
xor eax, eax
|
||
rep stosd
|
||
pop eax
|
||
mov byte [edx], 1 ; version
|
||
; mov esi, edi ; esi points to BDFE
|
||
mov [ebp+exFAT.points_to_BDFE], edi
|
||
; DEBUGF 1, "K : exFAT.points_to_BDFE start EDI: %x\n", edi
|
||
mov ecx, [ebx+12] ; number of blocks to read
|
||
mov ebx, [ebx+4] ; index of the first block
|
||
;------------------------------------------------------------------------------
|
||
; DEBUGF 1, "K : exFAT_ReadFolder 1 ECX: %x\n", ecx
|
||
cmp [ebp+exFAT.valid_data_length], 0xffffffff
|
||
je .num_read_blocks
|
||
inc dword [edx+8] ; new file found
|
||
test ecx, ecx
|
||
jz .num_read_blocks
|
||
test ebx, ebx
|
||
jnz .dec_offset
|
||
; DEBUGF 1, "K : exFAT_ReadFolder create .. dir \n"
|
||
inc dword [edx+4] ; new file block copied
|
||
push eax esi
|
||
mov esi, edi ; [ebp+exFAT.points_to_BDFE]
|
||
mov [esi], dword 0x10 ; attributes
|
||
xor eax, eax
|
||
mov [esi+8], eax ; creation time
|
||
mov [esi+12], dword 0x010101 ; eax ; creation date
|
||
mov [esi+16], eax ; last access time
|
||
mov [esi+20], dword 0x020202 ;eax ; last access date
|
||
mov [esi+24], eax ; last write time
|
||
mov [esi+28], dword 0x010303 ; eax ; last write date
|
||
mov [esi+32], eax ; file size (low dword)
|
||
mov [esi+36], eax ; file size (high dword)
|
||
push ebp
|
||
lea ebp, [esp+4+12]
|
||
; DEBUGF 1, "K : exFAT_ReadFolder 1 ESI: %x EBP: %x\n", esi, ebp
|
||
; DEBUGF 1, "K : exFAT_ReadFolder old file [EBP-4]: %x [EBP]: %x [EBP+4]: %x [EBP+8]: %x\n", [ebp-4], [ebp], [ebp+4], [ebp+8]
|
||
mov eax, [ebp-4]
|
||
mov [esi+4], eax ; cp866/UNICODE name
|
||
mov [ebp], dword 0x002e002e ; imitate dir '..'
|
||
xor eax, eax
|
||
mov [ebp+4], eax
|
||
call exFAT_entry_to_bdfe2.copy_path
|
||
pop ebp
|
||
mov [ebp+exFAT.points_to_BDFE], esi
|
||
; DEBUGF 1, "K : exFAT_ReadFolder 2 ESI: %x EBP: %x\n", esi, ebp
|
||
pop esi eax
|
||
dec ecx
|
||
jmp .num_read_blocks
|
||
.dec_offset:
|
||
dec ebx
|
||
.num_read_blocks:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder 2 ECX: %x\n", ecx
|
||
;------------------------------------------------------------------------------
|
||
lea esi, [esp+4] ; buffer for UTF-16 name (space for LFN)
|
||
mov [ebp+exFAT.LFN_reserve_place], esi
|
||
; push eax
|
||
; dec eax
|
||
; dec eax
|
||
; imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
; add eax, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
; DEBUGF 1, "K : exFAT ROOT SECTOR: %x\n", eax
|
||
; pop eax
|
||
mov [ebp+exFAT.secondary_dir_entry], dword 1
|
||
.new_cluster:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.new_cluster \n"
|
||
mov [ebp+exFAT.cluster_tmp], eax
|
||
test eax, eax
|
||
; jz .notfound
|
||
jnz @f
|
||
jmp .notfound
|
||
@@:
|
||
dec eax
|
||
dec eax
|
||
imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
push [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
add eax, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
push ebx
|
||
.new_sector:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.new_sector \n"
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
mov edi, ebx
|
||
push eax
|
||
; DEBUGF 1, "K : exFAT fs_read32_sys N1 EAX: %x\n", eax
|
||
call fs_read32_sys
|
||
test eax, eax
|
||
pop eax
|
||
jnz .notfound2
|
||
add ebx, 512
|
||
push eax
|
||
.l1:
|
||
; cmp [edi], dword 0
|
||
; je .l1_1
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.l1 [EDI]:%x\n", [edi]
|
||
;.l1_1:
|
||
; push esi
|
||
; lea esi, [esp+20]
|
||
; DEBUGF 1, "K : exFAT RD need_hash :%x\n", [ebp+exFAT.need_hash]
|
||
call exFAT_get_name
|
||
; pop esi
|
||
jc .l2
|
||
; cmp byte [edi], 0xC1 ; File Name Extension Directory Entry of ExFAT
|
||
; jnz .do_bdfe
|
||
; DEBUGF 1, "K : exFAT_ReadFolder CMP SDE\n"
|
||
xor eax, eax
|
||
cmp [ebp+exFAT.secondary_dir_entry], eax
|
||
jz .do_bdfe
|
||
; add edi, 0x20
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.do_bdfe EDI: %x EBX: %x\n", edi, ebx
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.do_bdfe EDI:%x [EDI]:%x NAME:%s\n", edi, [edi], edi
|
||
cmp edi, ebx
|
||
jb .do_bdfe
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.do_bdfe EDI after\n", edi, ebx
|
||
pop eax
|
||
inc eax
|
||
dec dword [esp+4]
|
||
jnz @f
|
||
mov eax, [ebp+exFAT.cluster_tmp]
|
||
test eax, eax
|
||
jz .done
|
||
; Check - General Secondary Flags
|
||
; Bit 0 : Allocation possible
|
||
; 0 – No cluster allocated; 1 – cluster allocation is possible
|
||
; Bit 1 : No FAT chain
|
||
; 0 – Yes ; The clusters of this file/directory are NOT contiguous
|
||
; 1 – No; The Contiguous Cluster are allocated to this file/directory;
|
||
; This improves the File read performance
|
||
; Bits 2 – 7 : Reserved
|
||
test byte [ebp+exFAT.General_Sec_Flags], 10b
|
||
jz .get_FAT_1
|
||
inc eax
|
||
jmp .continue_1
|
||
.get_FAT_1:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder N1 exFAT_get_FAT Input EAX: %x\n", eax
|
||
call exFAT_get_FAT
|
||
; DEBUGF 1, "K : exFAT_ReadFolder N1 exFAT_get_FAT Output EAX: %x\n", eax
|
||
jc .notfound2
|
||
cmp eax, 2
|
||
jb .done
|
||
.continue_1:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.continue_1\n"
|
||
cmp eax, [ebp+exFAT.fatRESERVED]
|
||
jae .done
|
||
push eax
|
||
mov eax, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
mov [esp+8], eax
|
||
pop eax
|
||
mov [ebp+exFAT.cluster_tmp], eax
|
||
dec eax
|
||
dec eax
|
||
imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
add eax, [ebp+exFAT.DATA_START]
|
||
@@:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.@@ \n"
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
mov edi, ebx
|
||
push eax
|
||
; DEBUGF 1, "K : exFAT fs_read32_sys N2 EAX: %x\n", eax
|
||
call fs_read32_sys
|
||
test eax, eax
|
||
pop eax
|
||
jnz .notfound2
|
||
add ebx, 512
|
||
push eax
|
||
.do_bdfe:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.do_bdfe \n"
|
||
inc dword [edx+8] ; new file found
|
||
dec dword [esp+4]
|
||
jns .l2
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.do_bdfe ECX: %x\n", ecx
|
||
dec ecx
|
||
js .l2
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.do_bdfe 2 \n"
|
||
inc dword [edx+4] ; new file block copied
|
||
push esi edi
|
||
mov esi, [ebp+exFAT.points_to_BDFE]
|
||
lea edi, [ebp+exFAT.file_dir_entry]
|
||
push ebp
|
||
lea ebp, [esp+20+4+4]
|
||
; DEBUGF 1, "K : exFAT_ReadFolder ESI: %x EBP: %x\n", esi, ebp
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.do_bdfe EDI:%x [EDI]:%x ESI:%x [ESI]:%x EBP:%x NAME:%s\n", edi, [edi], esi, [esi], ebp, ebp
|
||
call exFAT_entry_to_bdfe
|
||
pop ebp
|
||
mov [ebp+exFAT.points_to_BDFE], esi
|
||
pop edi esi
|
||
.l2:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.l2 \n"
|
||
add edi, 0x20
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.do_bdfe EDI: %x EBX: %x\n", edi, ebx
|
||
cmp edi, ebx
|
||
jb .l1
|
||
pop eax
|
||
inc eax
|
||
dec dword [esp+4]
|
||
jnz .new_sector
|
||
mov eax, [ebp+exFAT.cluster_tmp]
|
||
test eax, eax
|
||
jz .done
|
||
|
||
push eax
|
||
mov eax, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
shl eax, 9
|
||
sub [ebp+exFAT.valid_data_length], eax
|
||
pop eax
|
||
jbe .done
|
||
; Check - General Secondary Flags
|
||
; Bit 0 : Allocation possible
|
||
; 0 – No cluster allocated; 1 – cluster allocation is possible
|
||
; Bit 1 : No FAT chain
|
||
; 0 – Yes ; The clusters of this file/directory are NOT contiguous
|
||
; 1 – No; The Contiguous Cluster are allocated to this file/directory;
|
||
; This improves the File read performance
|
||
; Bits 2 – 7 : Reserved
|
||
test byte [ebp+exFAT.General_Sec_Flags], 10b
|
||
jz .get_FAT
|
||
inc eax
|
||
jmp .continue
|
||
.get_FAT:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder N2 exFAT_get_FAT Input EAX: %x\n", eax
|
||
call exFAT_get_FAT
|
||
; DEBUGF 1, "K : exFAT_ReadFolder N2 exFAT_get_FAT Output EAX: %x\n", eax
|
||
jc .notfound2
|
||
cmp eax, 2
|
||
jb .done
|
||
.continue:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.continue \n"
|
||
cmp eax, [ebp+exFAT.fatRESERVED]
|
||
jae .done
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.continue after\n"
|
||
push eax
|
||
mov eax, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
mov [esp+8], eax
|
||
pop eax
|
||
pop ebx
|
||
add esp, 4
|
||
jmp .new_cluster
|
||
;------------------------------------------------------------------------------
|
||
.notfound2:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.notfound2 \n"
|
||
add esp, 8
|
||
.notfound:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.notfound \n"
|
||
add esp, 262*2+4
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.ERROR_DEVICE \n"
|
||
push ERROR_DEVICE
|
||
jmp @f
|
||
;------------------------------------------------------------------------------
|
||
.done:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.done \n"
|
||
; DEBUGF 1, "K : exFAT_ReadFolder TotalBloks: %x\n", [edx+8]
|
||
; DEBUGF 1, "K : exFAT_ReadFolder Read Bloks: %x\n", [edx+4]
|
||
add esp, 262*2+12
|
||
pushd 0
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.done ECX: %x\n", ecx
|
||
dec ecx
|
||
js @f
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.ERROR_END_OF_FILE \n"
|
||
mov byte [esp], ERROR_END_OF_FILE
|
||
@@:
|
||
mov ebx, [edx+4]
|
||
;------------------------------------------------------------------------------
|
||
.ret:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.ret \n"
|
||
; DEBUGF 1, "K : exFAT_ReadFile Return ESI:%x\n", esi
|
||
call exFAT_unlock
|
||
pop eax
|
||
; DEBUGF 1, "K : exFAT_ReadFile Return EBX:%x\n", ebx
|
||
; mov esi, [ebp+exFAT.LFN_reserve_place]
|
||
; push eax
|
||
; pushfd
|
||
; pop eax
|
||
; DEBUGF 1, "K : eFlags:%x\n",eax
|
||
; pop eax
|
||
; DEBUGF 1, "K : EAX:%x EBX:%x ECX:%x EDX:%x\n", eax, ebx, ecx, edx
|
||
; DEBUGF 1, "K : EBP:%x ESI:%x EDI:%x\n", ebp, esi, edi
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
.error:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.error \n"
|
||
push eax
|
||
xor ebx, ebx
|
||
jmp .ret
|
||
;------------------------------------------------------------------------------
|
||
.accessDenied:
|
||
; DEBUGF 1, "K : exFAT_ReadFolder.ERROR_ACCESS_DENIED \n"
|
||
push ERROR_ACCESS_DENIED
|
||
xor ebx, ebx
|
||
jmp .ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_GetFileInfo:
|
||
; DEBUGF 1, "K : exFAT_GetFileInfo \n"
|
||
; DEBUGF 1, "K : exFAT F70 +00: %x\n", [ebx]
|
||
; DEBUGF 1, "K : exFAT F70 +04: %x\n", [ebx+4]
|
||
; DEBUGF 1, "K : exFAT F70 +08: %x\n", [ebx+8]
|
||
; DEBUGF 1, "K : exFAT F70 +12: %x\n", [ebx+12]
|
||
; DEBUGF 1, "K : exFAT F70 +16: %x\n", [ebx+16]
|
||
; DEBUGF 1, "K : exFAT F70 +20: %x\n", [ebx+20]
|
||
; DEBUGF 1, "K : exFAT Path: %s\n", esi
|
||
cmp byte [esi], 0
|
||
jz .volume
|
||
call exFAT_lock
|
||
xor eax, eax
|
||
mov [ebp+exFAT.need_hash], eax ; dword 0
|
||
mov [ebp+exFAT.hash_flag], eax ; dword 0
|
||
call exFAT_hd_find_lfn
|
||
jc @f
|
||
lea edi, [ebp+exFAT.file_dir_entry]
|
||
push ebp
|
||
xor ebp, ebp
|
||
mov esi, [ebx+16]
|
||
mov dword [esi+4], ebp
|
||
call exFAT_entry_to_bdfe2
|
||
pop ebp
|
||
xor eax, eax
|
||
@@:
|
||
push eax
|
||
call exFAT_unlock
|
||
pop eax
|
||
@@:
|
||
ret
|
||
|
||
.volume:
|
||
; DEBUGF 1, "K : exFAT_GetFileInfo.volume \n"
|
||
mov eax, dword[ebp+exFAT.Length]
|
||
mov edx, dword[ebp+exFAT.Length+4]
|
||
mov edi, [ebx+16]
|
||
shld edx, eax, 9
|
||
shl eax, 9
|
||
mov [edi+36], edx
|
||
mov [edi+32], eax
|
||
mov eax, [ebx+8]
|
||
mov byte [edi], 8
|
||
mov [edi+4], eax
|
||
test eax, eax
|
||
jz @b
|
||
lea esi, [ebp+exFAT.volumeLabel]
|
||
mov ecx, 11
|
||
@@:
|
||
mov byte [esi+ecx], 0
|
||
dec ecx
|
||
jz @f
|
||
cmp byte [esi+ecx], ' '
|
||
jz @b
|
||
@@:
|
||
mov cl, 12
|
||
add edi, 40
|
||
cmp eax, 2
|
||
jz @f
|
||
rep movsb
|
||
xor eax, eax
|
||
ret
|
||
|
||
@@:
|
||
lodsb
|
||
stosw
|
||
loop @b
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_SetFileInfo:
|
||
; DEBUGF 1, "K : exFAT_SetFileInfo \n"
|
||
; DEBUGF 1, "K : exFAT F70 +00: %x\n", [ebx]
|
||
; DEBUGF 1, "K : exFAT F70 +04: %x\n", [ebx+4]
|
||
; DEBUGF 1, "K : exFAT F70 +08: %x\n", [ebx+8]
|
||
; DEBUGF 1, "K : exFAT F70 +12: %x\n", [ebx+12]
|
||
; DEBUGF 1, "K : exFAT F70 +16: %x\n", [ebx+16]
|
||
; DEBUGF 1, "K : exFAT F70 +20: %x\n", [ebx+20]
|
||
; DEBUGF 1, "K : exFAT Path: %s\n", esi
|
||
call exFAT_lock
|
||
xor eax, eax
|
||
mov [ebp+exFAT.need_hash], eax ; dword 0
|
||
mov [ebp+exFAT.hash_flag], eax ; dword 0
|
||
call exFAT_hd_find_lfn
|
||
jc @f
|
||
|
||
mov edi, [ebp+exFAT.buff_file_dir_pos]
|
||
cmp eax, [ebp+exFAT.buff_file_dirsect]
|
||
je .continue
|
||
|
||
mov eax, [ebp+exFAT.buff_file_dirsect]
|
||
mov [ebp+exFAT.buffer_curr_sector], eax
|
||
|
||
push eax ebx
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
call fs_read32_sys
|
||
test eax, eax
|
||
jz .continue_1 ; CF=0
|
||
|
||
pop ebx
|
||
add esp, 4
|
||
jmp @f
|
||
|
||
.continue_1:
|
||
pop ebx eax
|
||
|
||
.continue:
|
||
push eax
|
||
mov edx, [ebx+16] ; pointer to buffer with attributes (32 bytes)
|
||
call exFAT_bdfe_to_fat_entry
|
||
pop eax
|
||
; copy new File/Folder Directory Entry [0x85] for calculate SetChecksum field
|
||
push esi edi
|
||
xchg esi, edi
|
||
lea edi, [ebp+exFAT.file_dir_entry]
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
movsd
|
||
pop edi esi
|
||
|
||
push eax
|
||
call calculate_SetChecksum_field
|
||
mov [edi+2], ax
|
||
pop eax
|
||
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
call fs_write32_sys
|
||
call exFAT_update_disk
|
||
xor eax, eax
|
||
@@:
|
||
push eax
|
||
call exFAT_unlock
|
||
pop eax
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_Delete:
|
||
; DEBUGF 1, "K : exFAT_Delete\n"
|
||
; DEBUGF 1, "K : exFAT F70 +00: %x\n", [ebx]
|
||
; DEBUGF 1, "K : exFAT F70 +04: %x\n", [ebx+4]
|
||
; DEBUGF 1, "K : exFAT F70 +08: %x\n", [ebx+8]
|
||
; DEBUGF 1, "K : exFAT F70 +12: %x\n", [ebx+12]
|
||
; DEBUGF 1, "K : exFAT F70 +16: %x\n", [ebx+16]
|
||
; DEBUGF 1, "K : exFAT F70 +20: %x\n", [ebx+20]
|
||
; DEBUGF 1, "K : exFAT Path: %s\n", esi
|
||
call exFAT_lock
|
||
xor eax, eax
|
||
mov [ebp+exFAT.need_hash], eax ; dword 0
|
||
mov [ebp+exFAT.hash_flag], eax ; dword 0
|
||
; and [ebp+exFAT.longname_sec1], 0
|
||
; and [ebp+exFAT.longname_sec2], 0
|
||
mov [ebp+exFAT.longname_sec1], eax
|
||
mov [ebp+exFAT.longname_sec2], eax
|
||
call exFAT_hd_find_lfn
|
||
jc .notFound
|
||
; cmp dword [edi], '. '
|
||
; jz .access_denied2
|
||
; cmp dword [edi], '.. '
|
||
; jz .access_denied2
|
||
; test byte [edi+11], 10h
|
||
push eax
|
||
lea eax, [ebp+exFAT.file_dir_entry]
|
||
; DEBUGF 1, "K : exFAT_Delete: File Attributes:%x\n", [eax+4]
|
||
test byte [eax+4], 10000b
|
||
pop eax
|
||
jz .dodel
|
||
; we can delete only empty folders!
|
||
pushad
|
||
; mov esi, [edi+20-2]
|
||
; mov si, [edi+26] ; esi=cluster
|
||
lea eax, [ebp+exFAT.str_ext_dir_entry]
|
||
mov esi, [eax+20] ; cluster
|
||
; DEBUGF 1, "K : exFAT_Delete: Cluster1:%x [EDI+20]:%x\n", esi, [edi+20]
|
||
xor ecx, ecx
|
||
lea eax, [esi-2]
|
||
imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
add eax, [ebp+exFAT.DATA_START]
|
||
; add eax, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
call fs_read32_sys
|
||
test eax, eax
|
||
jnz .err1
|
||
lea eax, [ebx+0x200]
|
||
; add ebx, 2*0x20
|
||
.checkempty:
|
||
; DEBUGF 1, "K : exFAT_Delete.checkempty: [EBX]:%x\n", [ebx]
|
||
cmp byte [ebx], 0 ; DIR_Name[0] == 0x00, then the directory entry is free
|
||
jz .empty
|
||
; cmp byte [ebx], 0xE5 ; DIR_Name[0] == 0xE5, then the directory entry is free
|
||
; jnz .notempty
|
||
cmp byte [ebx], 0x85 ; File/Folder Directory Entry of ExFAT
|
||
jz .notempty
|
||
cmp byte [ebx], 0xC0 ; Stream Extension Directory Entry of ExFAT
|
||
jz .notempty
|
||
cmp byte [ebx], 0xC1 ; File Name Extension Directory Entry of ExFAT
|
||
jz .notempty
|
||
add ebx, 0x20
|
||
cmp ebx, eax
|
||
jb .checkempty
|
||
inc ecx
|
||
cmp ecx, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
jb @f
|
||
mov eax, esi
|
||
; Check - General Secondary Flags
|
||
; Bit 0 : Allocation possible
|
||
; 0 – No cluster allocated; 1 – cluster allocation is possible
|
||
; Bit 1 : No FAT chain
|
||
; 0 – Yes ; The clusters of this file/directory are NOT contiguous
|
||
; 1 – No; The Contiguous Cluster are allocated to this file/directory;
|
||
; This improves the File read performance
|
||
; Bits 2 – 7 : Reserved
|
||
test byte [ebp+exFAT.General_Sec_Flags], 10b
|
||
jz .get_FAT
|
||
inc eax ; inc cluster
|
||
jmp .continue
|
||
.get_FAT:
|
||
; DEBUGF 1, "K : exFAT_Delete.get_FAT:\n"
|
||
call exFAT_get_FAT
|
||
jc .err1
|
||
cmp eax, 2
|
||
jb .error_fat
|
||
.continue:
|
||
; DEBUGF 1, "K : exFAT_Delete.continue:\n"
|
||
cmp eax, [ebp+exFAT.fatRESERVED]
|
||
jae .empty
|
||
mov esi, eax
|
||
xor ecx, ecx
|
||
@@:
|
||
; DEBUGF 1, "K : exFAT_Delete.@@:\n"
|
||
lea eax, [esi-2]
|
||
imul eax, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
add eax, [ebp+exFAT.DATA_START]
|
||
; add eax, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
add eax, ecx
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
call fs_read32_sys
|
||
test eax, eax
|
||
lea eax, [ebx+0x200]
|
||
jz .checkempty
|
||
.err1:
|
||
; DEBUGF 1, "K : exFAT_Delete.err1:\n"
|
||
popad
|
||
.err2:
|
||
; DEBUGF 1, "K : exFAT_Delete.err2:\n"
|
||
push ERROR_DEVICE
|
||
.ret:
|
||
; DEBUGF 1, "K : exFAT_Delete.ret:\n"
|
||
call exFAT_unlock
|
||
pop eax
|
||
ret
|
||
|
||
.notFound:
|
||
; DEBUGF 1, "K : exFAT_Delete.notFound:\n"
|
||
push ERROR_FILE_NOT_FOUND
|
||
jmp .ret
|
||
|
||
.error_fat:
|
||
; DEBUGF 1, "K : exFAT_Delete.error_fat:\n"
|
||
popad
|
||
push ERROR_FS_FAIL
|
||
jmp .ret
|
||
|
||
.notempty:
|
||
; DEBUGF 1, "K : exFAT_Delete.notempty:\n"
|
||
popad
|
||
.access_denied2:
|
||
; DEBUGF 1, "K : exFAT_Delete.access_denied2:\n"
|
||
push ERROR_ACCESS_DENIED
|
||
jmp .ret
|
||
|
||
.empty:
|
||
; DEBUGF 1, "K : exFAT_Delete.empty:\n"
|
||
popad
|
||
push eax ebx
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
call fs_read32_sys
|
||
test eax, eax
|
||
pop ebx eax
|
||
jnz .err2
|
||
.dodel:
|
||
; DEBUGF 1, "K : exFAT_Delete.dodel:\n"
|
||
push eax
|
||
; mov eax, [edi+20-2]
|
||
; mov ax, [edi+26] ; eax=cluster
|
||
lea eax, [ebp+exFAT.str_ext_dir_entry]
|
||
mov eax, [eax+20] ; cluster
|
||
; DEBUGF 1, "K : exFAT_Delete: Cluster2:%x [EDI+20]:%x\n", eax, [edi+20]
|
||
xchg eax, [esp]
|
||
|
||
mov edi, [ebp+exFAT.buff_file_dir_pos]
|
||
cmp eax, [ebp+exFAT.buff_file_dirsect]
|
||
je .continue_2
|
||
|
||
mov eax, [ebp+exFAT.buff_file_dirsect]
|
||
mov [ebp+exFAT.buffer_curr_sector], eax
|
||
|
||
push eax ebx
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
call fs_read32_sys
|
||
test eax, eax
|
||
jz .continue_1 ; CF=0
|
||
|
||
pop ebx
|
||
add esp, 4
|
||
jmp .err2
|
||
|
||
.continue_1:
|
||
; DEBUGF 1, "K : exFAT_Delete.continue_1:\n"
|
||
pop ebx eax
|
||
|
||
.continue_2:
|
||
; DEBUGF 1, "K : exFAT_Delete.continue_2: EAX:%x\n", eax
|
||
push ecx
|
||
; delete folder entry
|
||
; mov byte [edi], 0xE5 ; for FAT
|
||
and byte [edi], 0x7F ; Entry Type is 0x85 is changed to 0x05
|
||
movzx ecx, byte [edi+1] ; Number of Secondary directory entries
|
||
inc ecx
|
||
; delete LFN (if present)
|
||
.lfndel:
|
||
; DEBUGF 1, "K : exFAT_Delete.lfndel: [EDI]:%x\n", [edi]
|
||
add edi, 0x20
|
||
; lea edx, [ebp+exFAT.buffer]
|
||
lea edx, [ebp+exFAT.buffer+0x200]
|
||
; cmp edi, edx
|
||
cmp edx, edi
|
||
ja @f
|
||
|
||
; cmp [ebp+exFAT.longname_sec2], 0
|
||
; jz .lfndone
|
||
; push [ebp+exFAT.longname_sec2]
|
||
; push [ebp+exFAT.longname_sec1]
|
||
; pop [ebp+exFAT.longname_sec2]
|
||
; and [ebp+exFAT.longname_sec1], 0
|
||
; DEBUGF 1, "K : exFAT_Delete: lngnm_sec1:%x lngnm_sec2:%x\n", [ebp+exFAT.longname_sector1], [ebp+exFAT.longname_sector2]
|
||
cmp [ebp+exFAT.longname_sector1], 0
|
||
je .longname_sec2
|
||
|
||
push eax
|
||
mov eax, [ebp+exFAT.buff_file_dirsect]
|
||
cmp eax, [ebp+exFAT.longname_sector1]
|
||
pop eax
|
||
; je .longname_sec2
|
||
jne .longname_sec1
|
||
and [ebp+exFAT.longname_sector1], 0
|
||
jmp .longname_sec2
|
||
.longname_sec1:
|
||
push [ebp+exFAT.longname_sector1]
|
||
and [ebp+exFAT.longname_sector1], 0
|
||
jmp .longname_sec3
|
||
.longname_sec2:
|
||
; DEBUGF 1, "K : exFAT_Delete.longname_sec2:\n"
|
||
cmp [ebp+exFAT.longname_sector2], 0
|
||
je .lfndone
|
||
|
||
push eax
|
||
mov eax, [ebp+exFAT.buff_file_dirsect]
|
||
cmp eax, [ebp+exFAT.longname_sector2]
|
||
pop eax
|
||
je .lfndone
|
||
|
||
push [ebp+exFAT.longname_sector2]
|
||
and [ebp+exFAT.longname_sector2], 0
|
||
.longname_sec3:
|
||
; DEBUGF 1, "K : exFAT_Delete.longname_sec3:\n"
|
||
|
||
push ebx
|
||
; mov ebx, edx
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
call fs_write32_sys
|
||
mov eax, [esp+4]
|
||
; DEBUGF 1, "K : exFAT_Delete: EAX:%x\n", eax
|
||
call fs_read32_sys
|
||
pop ebx
|
||
pop eax
|
||
; lea edi, [ebp+exFAT.buffer+0x200]
|
||
lea edi, [ebp+exFAT.buffer]
|
||
@@:
|
||
; DEBUGF 1, "K : exFAT_Delete.@@: [EDI]:%x\n", [edi]
|
||
; sub edi, 0x20
|
||
;; add edi, 0x20
|
||
; cmp byte [edi], 0xE5
|
||
; jz .lfndone
|
||
dec ecx
|
||
jz .lfndone
|
||
cmp byte [edi], 0
|
||
jz .lfndone
|
||
cmp byte [edi], 0x85
|
||
jz .lfndone
|
||
; cmp byte [edi+11], 0xF
|
||
; jnz .lfndone
|
||
; mov byte [edi], 0xE5
|
||
and byte [edi], 0x7F ; 0xC0 is changed to 0x40; 0xC1 is changed to 0x41
|
||
jmp .lfndel
|
||
.lfndone:
|
||
; DEBUGF 1, "K : exFAT_Delete.lfndone:\n"
|
||
pop ecx
|
||
push ebx
|
||
lea ebx, [ebp+exFAT.buffer]
|
||
call fs_write32_sys
|
||
pop ebx
|
||
; delete FAT chain
|
||
pop eax
|
||
call exFAT_clear_Cluster_Heap
|
||
call exFAT_clear_cluster_chain
|
||
call exFAT_update_disk
|
||
call exFAT_unlock
|
||
xor eax, eax
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
calculate_SetChecksum_field:
|
||
push ebx ecx edx esi edi
|
||
lea esi, [ebp+exFAT.file_dir_entry]
|
||
mov ecx, [ebp+exFAT.fname_extdir_offset]
|
||
sub ecx, esi
|
||
mov edx, esi
|
||
mov edi, esi
|
||
add edx, 2 ; (Index == 2)
|
||
add edi, 3 ; (Index == 3)
|
||
; exFAT_calculate_SetChecksum_field
|
||
; in:
|
||
; esi -> file_dir_entry
|
||
; ecx -> NumberOfBytes
|
||
; out: ax = Checksum
|
||
xor eax, eax
|
||
xor ebx, ebx
|
||
;--------------------------------------
|
||
align 4
|
||
.start:
|
||
; DEBUGF 1, "Checksum start EAX:%x ECX:%x\n", eax, ecx
|
||
cmp esi, edx ; (Index == 2)
|
||
je .continue
|
||
cmp esi, edi ; (Index == 3)
|
||
je .continue
|
||
mov bx, ax
|
||
; ((Checksum&1) ? 0x8000 : 0)
|
||
and ax, 0x1
|
||
jz .else
|
||
|
||
mov ax, 0x8000
|
||
jmp @f
|
||
;--------------------------------------
|
||
.else:
|
||
xor ax, ax
|
||
;--------------------------------------
|
||
@@:
|
||
; DEBUGF 1, "(Checksum&1) EAX:%x\n", eax
|
||
; (Hash>>1)
|
||
shr bx, 1
|
||
; DEBUGF 1, "(Checksum>>1) EBX:%x\n", ebx
|
||
add ax, bx
|
||
; DEBUGF 1, "+ (Checksum>>1) EAX:%x\n", eax
|
||
movzx bx, byte [esi]
|
||
add ax, bx
|
||
; DEBUGF 1, "+ (UInt16)Entries[Index] EAX:%x\n", eax
|
||
.continue:
|
||
inc esi
|
||
dec ecx
|
||
jnz .start
|
||
;--------------------------------------
|
||
lea ebx, [ebp+exFAT.file_dir_entry+2]
|
||
mov [ebx], ax
|
||
pop edi esi edx ecx ebx
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_clear_Cluster_Heap:
|
||
; in: eax = first cluster
|
||
|
||
;ClstHeap_change db ? ; 1=Cluster Heap has changed
|
||
;ClstHeap_in_cache dd ?
|
||
;ClstHeap_cache_ptr dd ?
|
||
|
||
push eax ebx ecx edx esi
|
||
mov ebx, [ebp+exFAT.ClstHeap_cache_ptr]
|
||
push eax
|
||
lea eax, [ebp+exFAT.str_ext_dir_entry]
|
||
mov edx, [eax+12] ; high dword of real file size
|
||
; DEBUGF 1, "K : exFAT_clear_Cluster_Heap Hdword file size:%x\n", edx
|
||
mov eax, [eax+8] ; low dword of real file size
|
||
; DEBUGF 1, "K : exFAT_clear_Cluster_Heap Ldword file size:%x\n", eax
|
||
mov ecx, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
; DEBUGF 1, "K : exFAT_clear_Cluster_Heap SECTORS_PER_CLUSTER:%x\n", ecx
|
||
shl ecx, 9
|
||
div ecx
|
||
test edx, edx
|
||
jz @f
|
||
inc eax
|
||
@@:
|
||
mov edx, eax
|
||
; DEBUGF 1, "K : exFAT_clear_Cluster_Heap number of clusters:%x\n", edx
|
||
pop eax
|
||
.start:
|
||
; DEBUGF 1, "K : exFAT_clear_Cluster_Heap current cluster:%x\n", eax
|
||
cmp eax, [ebp+exFAT.LAST_CLUSTER]
|
||
ja .exit
|
||
cmp eax, 2
|
||
jb .exit
|
||
cmp eax, [ebp+exFAT.ROOT_CLUSTER]
|
||
jz .exit
|
||
|
||
push eax
|
||
dec eax
|
||
dec eax
|
||
|
||
mov ecx, 7
|
||
and ecx, eax ; get offset of bits
|
||
; DEBUGF 1, "K : exFAT_clear_Cluster_Heap offset of bits:%x\n", ecx
|
||
shr eax, 3
|
||
|
||
mov esi, 511
|
||
and esi, eax ; get offset of bytes
|
||
; DEBUGF 1, "K : exFAT_clear_Cluster_Heap offset of bytes:%x\n", esi
|
||
shr eax, 9 ; get get offset of sectors
|
||
; DEBUGF 1, "K : exFAT_clear_Cluster_Heap offset of sectors:%x\n", eax
|
||
add eax, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
; DEBUGF 1, "K : exFAT_clear_Cluster_Heap general offset:%x\n", eax
|
||
cmp eax, [ebp+exFAT.ClstHeap_in_cache]
|
||
je .inCache
|
||
|
||
cmp [ebp+exFAT.ClstHeap_change], 0
|
||
je @f
|
||
|
||
mov [ebp+exFAT.ClstHeap_change], 0
|
||
push eax
|
||
mov eax, [ebp+exFAT.ClstHeap_in_cache]
|
||
call fs_write32_sys
|
||
pop eax
|
||
@@:
|
||
mov [ebp+exFAT.ClstHeap_in_cache], eax
|
||
call fs_read32_sys
|
||
test eax, eax
|
||
jne .error
|
||
.inCache:
|
||
xor eax, eax
|
||
mov al, [ebx+esi] ; get Cluster_Heap old value
|
||
; DEBUGF 1, "K : exFAT Cluster_Heap old value:%x\n", eax
|
||
ror al, cl
|
||
and al, 0xfe ; reset bit
|
||
rol al, cl
|
||
mov [ebx+esi], al ; save Cluster_Heap new value
|
||
|
||
; DEBUGF 1, "K : exFAT Cluster_Heap new value:%x\n", eax
|
||
mov [ebp+exFAT.ClstHeap_change], 1
|
||
pop eax
|
||
; Check - General Secondary Flags
|
||
; Bit 0 : Allocation possible
|
||
; 0 – No cluster allocated; 1 – cluster allocation is possible
|
||
; Bit 1 : No FAT chain
|
||
; 0 – Yes ; The clusters of this file/directory are NOT contiguous
|
||
; 1 – No; The Contiguous Cluster are allocated to this file/directory;
|
||
; This improves the File read performance
|
||
; Bits 2 – 7 : Reserved
|
||
; DEBUGF 1, "K : exFAT General_Sec_Flags %x\n", [ebp+exFAT.General_Sec_Flags]
|
||
test byte [ebp+exFAT.General_Sec_Flags], 10b
|
||
jz .get_FAT
|
||
|
||
dec edx ; dec cluster counter
|
||
jz .exit
|
||
|
||
inc eax ; inc cluster
|
||
jmp .start
|
||
.get_FAT:
|
||
call exFAT_get_FAT
|
||
jc .ret
|
||
jmp .start
|
||
.error:
|
||
pop eax
|
||
stc
|
||
jmp .ret
|
||
.exit:
|
||
clc
|
||
.ret:
|
||
pop esi edx ecx ebx eax
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_clear_cluster_chain:
|
||
; in: eax = first cluster
|
||
; DEBUGF 1, "K : exFAT_clear_cluster_chain: GSF:%x\n", [ebp+exFAT.General_Sec_Flags]
|
||
; Check - General Secondary Flags
|
||
; Bit 0 : Allocation possible
|
||
; 0 – No cluster allocated; 1 – cluster allocation is possible
|
||
; Bit 1 : No FAT chain
|
||
; 0 – Yes ; The clusters of this file/directory are NOT contiguous
|
||
; 1 – No; The Contiguous Cluster are allocated to this file/directory;
|
||
; This improves the File read performance
|
||
; Bits 2 – 7 : Reserved
|
||
test byte [ebp+exFAT.General_Sec_Flags], 10b
|
||
jz .set_FAT
|
||
ret
|
||
.set_FAT:
|
||
push eax edx
|
||
@@:
|
||
cmp eax, [ebp+exFAT.LAST_CLUSTER]
|
||
ja @f
|
||
cmp eax, 2
|
||
jb @f
|
||
cmp eax, [ebp+exFAT.ROOT_CLUSTER]
|
||
jz @f
|
||
xor edx, edx
|
||
call exFAT_set_FAT
|
||
jc .ret
|
||
|
||
mov eax, edx
|
||
jmp @b
|
||
@@:
|
||
clc
|
||
.ret:
|
||
pop edx eax
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_update_disk:
|
||
cmp [ebp+exFAT.ClstHeap_change], 0
|
||
je @f
|
||
mov [ebp+exFAT.ClstHeap_change], 0
|
||
push eax ebx
|
||
mov eax, [ebp+exFAT.ClstHeap_in_cache]
|
||
mov ebx, [ebp+exFAT.ClstHeap_cache_ptr]
|
||
call fs_write32_sys
|
||
pop ebx eax
|
||
@@:
|
||
cmp [ebp+exFAT.fat_change], 0
|
||
jz .noChange
|
||
call exFAT_write_fat_sector
|
||
.noChange:
|
||
mov esi, [ebp+PARTITION.Disk]
|
||
call disk_sync
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_write_fat_sector:
|
||
push eax ebx ecx
|
||
mov [ebp+exFAT.fat_change], 0
|
||
mov eax, [ebp+exFAT.fat_in_cache]
|
||
cmp eax, -1
|
||
jz @f
|
||
mov ebx, [ebp+exFAT.fat_cache_ptr]
|
||
mov ecx, [ebp+exFAT.NUMBER_OF_FATS]
|
||
.write_next_fat:
|
||
push eax
|
||
call fs_write32_sys
|
||
pop eax
|
||
add eax, [ebp+exFAT.SECTORS_PER_FAT]
|
||
dec ecx
|
||
jnz .write_next_fat
|
||
@@:
|
||
pop ecx ebx eax
|
||
ret
|
||
;------------------------------------------------------------------------------
|
||
exFAT_notroot_next:
|
||
; DEBUGF 1, "K : exFAT_notroot_next\n"
|
||
push ecx
|
||
lea ecx, [ebp+exFAT.buffer+0x200-0x20]
|
||
cmp edi, ecx
|
||
jae exFAT_notroot_next_sector
|
||
add edi, 0x20
|
||
@@:
|
||
; DEBUGF 1, "K : exFAT_notroot_next.ret\n"
|
||
pop ecx
|
||
ret
|
||
|
||
;exFAT_notroot_next_write:
|
||
; push ecx
|
||
; lea ecx, [ebp+exFAT.buffer+0x200]
|
||
; cmp edi, ecx
|
||
; jc @b
|
||
; push eax
|
||
; call exFAT_notroot_end_write
|
||
; pop eax
|
||
exFAT_notroot_next_sector:
|
||
; DEBUGF 1, "K : exFAT_notroot_next_sector\n"
|
||
push [ebp+exFAT.longname_sec2]
|
||
pop [ebp+exFAT.longname_sec1]
|
||
push eax
|
||
; DEBUGF 1, "K : exFAT_notroot_next.exFAT_get_sector In EAX:%x\n", eax
|
||
call exFAT_get_sector
|
||
; DEBUGF 1, "K : exFAT_notroot_next.exFAT_get_sector Out EAX:%x\n", eax
|
||
mov [ebp+exFAT.longname_sec2], eax
|
||
pop eax
|
||
mov ecx, [eax+4]
|
||
inc ecx
|
||
cmp ecx, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
jae exFAT_notroot_next_cluster
|
||
mov [eax+4], ecx
|
||
jmp @f
|
||
|
||
exFAT_notroot_next_err:
|
||
; DEBUGF 1, "K : exFAT_notroot_next_err\n"
|
||
; dec ecx
|
||
pop ecx
|
||
; js .1
|
||
movi eax, ERROR_FILE_NOT_FOUND
|
||
;.1:
|
||
stc
|
||
ret
|
||
|
||
exFAT_notroot_next_cluster:
|
||
; DEBUGF 1, "K : exFAT_notroot_next_cluster\n"
|
||
push eax
|
||
mov eax, [eax]
|
||
|
||
; push edi
|
||
; lea edi, [ebp+exFAT.str_ext_dir_entry]
|
||
; Check - General Secondary Flags
|
||
; Bit 0 : Allocation possible
|
||
; 0 – No cluster allocated; 1 – cluster allocation is possible
|
||
; Bit 1 : No FAT chain
|
||
; 0 – Yes ; The clusters of this file/directory are NOT contiguous
|
||
; 1 – No; The Contiguous Cluster are allocated to this file/directory;
|
||
; This improves the File read performance
|
||
; Bits 2 – 7 : Reserved
|
||
; push eax
|
||
; movzx eax, byte [edi+1]
|
||
; DEBUGF 1, "K : exFAT_notroot_next_cluster GSF 1:%x\n", eax
|
||
; movzx eax, byte [ebp+exFAT.General_Sec_Flags]
|
||
; DEBUGF 1, "K : exFAT_notroot_next_cluster GSF 2:%x\n", eax
|
||
; pop eax
|
||
; test byte [edi+1], 10b ;11b
|
||
; pop edi
|
||
test byte [ebp+exFAT.General_Sec_Flags], 10b
|
||
jz .get_FAT
|
||
inc eax
|
||
jmp .continue
|
||
.get_FAT:
|
||
call exFAT_get_FAT
|
||
.continue:
|
||
mov ecx, eax
|
||
pop eax
|
||
jc exFAT_notroot_first.deverr
|
||
cmp ecx, 2
|
||
jb exFAT_notroot_next_err
|
||
cmp ecx, [ebp+exFAT.fatRESERVED]
|
||
jae exFAT_notroot_next_err
|
||
mov [eax], ecx
|
||
and dword [eax+4], 0
|
||
@@:
|
||
pop ecx
|
||
exFAT_notroot_first:
|
||
; DEBUGF 1, "K : exFAT_notroot_first\n"
|
||
; DEBUGF 1, "K : exFAT_notroot_first.exFAT_get_sector In EAX:%x\n", eax
|
||
call exFAT_get_sector
|
||
; DEBUGF 1, "K : exFAT_notroot_first.exFAT_get_sector Out EAX:%x\n", eax
|
||
push ebx
|
||
lea edi, [ebp+exFAT.buffer]
|
||
mov ebx, edi
|
||
sub [ebp+exFAT.valid_data_length], 512
|
||
mov [ebp+exFAT.buffer_curr_sector], eax
|
||
call fs_read32_sys
|
||
pop ebx
|
||
test eax, eax
|
||
jz .ret ; CF=0
|
||
push ecx
|
||
.deverr:
|
||
; DEBUGF 1, "K : exFAT_notroot_first.deverr\n"
|
||
pop ecx
|
||
mov eax, ERROR_DEVICE
|
||
stc
|
||
.ret:
|
||
; DEBUGF 1, "K : exFAT_notroot_first.ret\n"
|
||
ret
|
||
|
||
;fat_notroot_begin_write:
|
||
; push eax edi
|
||
; call fat_notroot_first
|
||
; pop edi eax
|
||
; ret
|
||
|
||
;fat_notroot_end_write:
|
||
; call fat_get_sector
|
||
; push ebx
|
||
; lea ebx, [ebp+FAT.buffer]
|
||
; call fs_write32_sys
|
||
; pop ebx
|
||
; ret
|
||
;--------------------------------------
|
||
exFAT_get_sector:
|
||
; DEBUGF 1, "K : exFAT_get_sector\n"
|
||
push ecx
|
||
mov ecx, [eax]
|
||
; DEBUGF 1, "K : exFAT_get_sector In [EAX]:%x [EAX+4]:%x\n", ecx, [eax+4]
|
||
dec ecx
|
||
dec ecx
|
||
imul ecx, [ebp+exFAT.SECTORS_PER_CLUSTER]
|
||
; add ecx, [ebp+exFAT.DATA_START]
|
||
add ecx, [ebp+exFAT.CLUSTER_HEAP_START]
|
||
add ecx, [eax+4]
|
||
mov eax, ecx
|
||
pop ecx
|
||
ret
|
||
;------------------------------------------------------------------------------ |