;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2016. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License. ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision: 8986 $
ERROR_SUCCESS = 0
ERROR_DISK_BASE = 1
ERROR_UNSUPPORTED_FS = 2
ERROR_UNKNOWN_FS = 3
ERROR_PARTITION = 4
ERROR_FILE_NOT_FOUND = 5
ERROR_END_OF_FILE = 6
ERROR_MEMORY_POINTER = 7
ERROR_DISK_FULL = 8
ERROR_FS_FAIL = 9
ERROR_ACCESS_DENIED = 10
ERROR_DEVICE = 11
ERROR_OUT_OF_MEMORY = 12
maxPathLength = 1000h
image_of_eax EQU esp+32
image_of_ebx EQU esp+20
; ; System function 70 security check
; align 4
; proc file_system_is_operation_safe stdcall, inf_struct_ptr: dword
; ; in:
; ; inf_struct_ptr = pointer to information structure was given to sysfn70
; ; out: ZF = 1 if operation is safe
; ; ZF = 0 if operation can cause kernel crash
; push ebx ecx edx
; xor ecx, ecx ; ecx - length of target buffer
; mov ebx, [inf_struct_ptr]
; mov edx, [ebx + 16] ; base of target buffer
; cmp dword [ebx], 0 ; if 70.0
; jnz .case1
; mov ecx, dword [ebx + 12]
; jmp .end_switch
; .case1:
; cmp dword [ebx], 1 ; if 70.1
; jnz .case2_3
; ;mov ecx, 32
; cmp dword [ebx + 8], 1 ; check encoding
; jbe .case1_304 ; if encdoing <= 1 i.e cpp866
; mov ecx, 560 ; if unicode then bdvk block len is 560 bytes
; jmp .case1_end
; .case1_304:
; mov ecx, 304 ; if cp866 then bdvk block len is 304 bytes
; .case1_end:
; imul ecx, dword [ebx + 12] ; multiply bdvk length by their count
; add ecx, 32 ; add result header len
; jmp .end_switch
; .case2_3:
; cmp dword [ebx], 3
; ja .case5 ; if subfn > 3
; mov ecx, dword [ebx + 12]
; jmp .end_switch
; .case5:
; cmp dword [ebx], 5
; jnz .case6
; mov ecx, 40
; jmp .end_switch
; .case6:
; cmp dword [ebx], 6
; jnz .switch_none
; mov ecx, 32
; jmp .end_switch
; .switch_none:
; mov ecx, 1
; test ecx, ecx
; jmp .ret
; .end_switch:
; ;;
; stdcall is_region_userspace, edx, ecx
; .ret:
; pop edx ecx ebx
; ret
; endp
; syscall_syscall_fs_diff_encodings: ; with user pointer correctness checking
; ; in: ebx -> f.80 parameter structure
; stdcall file_system_is_operation_safe, ebx
; jnz @f
; DEBUGF 1, "sysfn80 addr error\n"
; mov dword [image_of_eax], ERROR_MEMORY_POINTER
; ret
; @@:
; jmp syscall_fs_diff_encodings
; temporarily commented out cause acpi driver (drivers/devman) uses sysfn70 via 0x40
; so because drivers it kernel space, pointer checking fails
; TODO solution: add filesystem functions without pointer checking to kernel exports
; and make the driver use them, not int 0x40
; syscall_syscall_fs_diff_encodings commented out for the same reason
; syscall_file_system_lfn: ; with user pointer correctness checking
; ; in: ebx -> f.70 parameter structure
; stdcall file_system_is_operation_safe, ebx
; jnz @f
; DEBUGF 1, "sysfn70 addr error\n"
; mov dword [image_of_eax], ERROR_MEMORY_POINTER
; ret
; @@:
; jmp syscall_file_system_lfn
; System function 70
syscall_file_system_lfn_protected:
pushad
call protect_from_terminate
call syscall_file_system_lfn
call unprotect_from_terminate
popad
mov [image_of_eax], eax
mov [image_of_ebx], ebx
ret
syscall_fs_diff_encodings:
; in: ebx -> f.80 parameter structure
mov edi, [ebx+20]
mov esi, [ebx+24]
jmp @f
syscall_file_system_lfn:
; in: ebx -> f.70 parameter structure
xor edi, edi
lea esi, [ebx+20]
cmp byte [esi], 0
jnz @f
mov esi, [ebx+21]
@@:
cmp word [esi], '/'
jnz @f
cmp edi, 2
jnz .rootdir
cmp dword[esi], '/'
jz .rootdir
@@:
stdcall kernel_alloc, maxPathLength
push eax ebx
xchg eax, edi
call getFullPath
pop ebx ebp
test eax, eax
jz .notfound
cmp dword[ebx], 7 ; start application
jnz @f
mov edx, [ebx+4]
mov ecx, [ebx+8]
mov ebx, ebp
call fs_execute
mov [image_of_eax], eax
ret
@@:
lea esi, [ebp+2]
mov ax, [esi]
or ax, 2020h
cmp ax, 'cd'
jz .CD
call dyndisk_handler ; not returns if success
.notfound:
stdcall kernel_free, ebp
mov dword[image_of_eax], ERROR_FILE_NOT_FOUND
ret
.CD:
add esi, 2
xor eax, eax
lodsb ; disk number
sub eax, '0'
cmp eax, 10
jnc .notfound
mov edi, eax
lodsb
test eax, eax
jz .maindir
cmp al, '/'
jnz .notfound
lodsb ; partition number
test eax, eax
jz .maindir
cmp al, '1'
jnz .notfound
cmp byte [esi], '/'
jnz @f
inc esi
@@:
call reserve_cd
mov eax, edi
bt eax, 0
setc [DiskNumber]
bt eax, 1
setc [ChannelNumber]
inc [ChannelNumber]
inc eax
mov [cdpos], eax
call reserve_cd_channel
mov eax, edi
not eax
and eax, 3
shl eax, 1
inc eax
shr edi, 2
mov dword[image_of_eax], ERROR_FILE_NOT_FOUND
bt [edi*5+DRIVE_DATA+1], ax
jnc @f
mov ecx, [ebx+12]
mov edx, [ebx+16]
mov eax, [ebx]
mov dword[image_of_eax], ERROR_UNSUPPORTED_FS
cmp eax, fs_NumCdServices
jae @f
add ebx, 4
push ebp
call dword[fs_CdServices + eax*4]
pop ebp
mov [image_of_eax], eax
mov [image_of_ebx], ebx
@@:
call free_cd_channel
and [cd_status], 0
stdcall kernel_free, ebp
ret
.nextCD:
test eax, eax ; partition number
jnz @f
inc eax ; /cdX/1
ret
@@:
stc
ret
.maindir: ; list partitions
mov esi, .nextCD
xor ecx, ecx
.maindir_noesi: ; backjump from dyndisk_handler
push ebp
mov ebp, ecx
call kernel_free
mov edi, [ebx+16] ; buffer
cmp byte [ebx], 5
jz .deviceInfo
cmp byte [ebx], 1 ; read folder?
jnz .access_denied
push ebp
pushd [ebx+4] ; first block
mov ebp, [ebx+12] ; the number of blocks to read
mov ebx, [ebx+8] ; flags
mov ecx, 32/4
mov edx, edi
xor eax, eax
rep stosd
mov byte [edx], 1 ; version
.maindir_loop:
call esi
jc .maindir_done
inc dword[edx+8]
dec dword[esp]
jns .maindir_loop
dec ebp
js .maindir_loop
inc dword[edx+4]
mov dword[edi], 16 ; attributes: folder
mov dword[edi+4], ebx ; name encoding
push eax
mov ecx, 32/4
add edi, 8
xor eax, eax
rep stosd
pop eax
push eax edx edi
; convert number in eax to decimal string
push -'0'
mov ecx, 10
@@:
xor edx, edx
div ecx
push edx
test eax, eax
jnz @b
cmp ebx, 2
jz .uni
@@:
pop eax
add eax, '0'
stosb
test eax, eax
jnz @b
pop edi edx eax
cmp ebx, 3
jz @f
add edi, 264
jmp .maindir_loop
.uni:
pop eax
add eax, '0'
stosw
test eax, eax
jnz .uni
pop edi edx eax
@@:
add edi, 520
jmp .maindir_loop
.maindir_done:
pop eax eax
mov ebx, [edx+4]
xor eax, eax
dec ebp
js @f
mov al, ERROR_END_OF_FILE
@@:
mov [image_of_eax], eax
mov [image_of_ebx], ebx
ret
.access_denied:
mov dword[image_of_eax], ERROR_ACCESS_DENIED
ret
.deviceInfo:
test ebp, ebp
jz @f
mov eax, dword[ebp+DISK.MediaInfo.Capacity]
mov edx, dword[ebp+DISK.MediaInfo.Capacity+4]
shld edx, eax, 9
shl eax, 9
mov [edi+36], edx
mov [edi+32], eax
@@:
and dword[image_of_eax], 0
ret
.rootdir: ; / - virtual root folder
cmp byte [ebx], 5
jz @b
cmp byte [ebx], 1 ; read folder?
jnz .access_denied
mov ebp, [ebx+12] ; number of blocks
mov edx, [ebx+16] ; return area
push dword[ebx+4] ; first block
mov ebx, [ebx+8] ; flags
mov ecx, 32/4
mov edi, edx
xor eax, eax
rep stosd
mov byte [edx], 1 ; version
sub esp, 16
.rootdir_loop:
push edi
lea edi, [esp+4]
call dyndisk_enum_root
pop edi
test eax, eax
jz .rootdirCD
inc dword[edx+8]
dec dword[esp+16]
jns .rootdir_loop
dec ebp
js .rootdir_loop
inc dword[edx+4]
mov dword[edi], 16 ; attributes: folder
mov dword[edi+4], ebx ; name encoding
push eax
mov ecx, 32/4
add edi, 8
xor eax, eax
rep stosd
push edi
lea esi, [esp+8]
cmp ebx, 2
jz .uni2
@@:
lodsb
stosb
test eax, eax
jnz @b
pop edi eax
cmp ebx, 3
jz @f
add edi, 264
jmp .rootdir_loop
.uni2:
lodsb
stosw
test eax, eax
jnz .uni2
pop edi eax
@@:
add edi, 520
jmp .rootdir_loop
.rootdirCD:
add esp, 16
or esi, -1
.rootdirCD_loop:
inc esi
cmp esi, 10
jnc .rootdir_done
mov eax, esi
not eax
and eax, 3
shl eax, 1
inc eax
mov ecx, esi
shr ecx, 2
bt [ecx*5+DRIVE_DATA+1], ax
jnc .rootdirCD_loop
inc dword[edx+8]
dec dword[esp]
jns .rootdirCD_loop
dec ebp
js .rootdirCD_loop
inc dword[edx+4]
mov dword[edi], 16 ; attributes: folder
mov dword[edi+4], ebx ; name encoding
mov ecx, 32/4
add edi, 8
xor eax, eax
rep stosd
mov eax, esi
add eax, '0'
cmp ebx, 1
jz @f
mov word [edi], 'cd'
mov [edi+2], ax
add edi, 264
jmp .rootdirCD_loop
@@:
mov dword[edi], 640063h
mov [edi+4], eax
add edi, 520
jmp .rootdirCD_loop
.rootdir_done:
pop eax
mov ebx, [edx+4]
xor eax, eax
dec ebp
js @f
mov al, ERROR_END_OF_FILE
@@:
mov [image_of_eax], eax
mov [image_of_ebx], ebx
ret
;-----------------------------------------------------------------------------
process_replace_file_name:
; in: [esi] = virtual path
; out: [esi]+[ebp] = physical path
xor edi, edi
xor ebp, ebp
.loop:
cmp edi, [full_file_name_table.size]
jae .notfound
push esi edi
shl edi, 7
add edi, [full_file_name_table]
@@:
cmp byte [edi], 0
jz .dest_done
lodsb
test al, al
jz .cont
scasb
jz @b
or al, 20h
cmp [edi-1], al
jz @b
.cont:
pop edi esi
inc edi
jmp .loop
.dest_done:
cmp byte [esi], 0
jz .found
cmp byte [esi], '/'
jnz .cont
.found:
pop edi eax
shl edi, 7
add edi, [full_file_name_table]
mov ebp, esi
lea esi, [edi+64]
.notfound:
ret
;-----------------------------------------------------------------------------
uglobal
addDirSeal db ?
endg
syscall_current_directory: ; sysfunction 30
mov eax, [current_slot]
mov edi, [eax+APPDATA.cur_dir]
xor eax, eax
dec ebx
jz .set
dec ebx
jz .get
dec ebx
jz .mount_additional_directory
mov eax, edx
dec ebx
jz .set
mov eax, esi
dec ebx
jz .get
@@:
ret
.mount_additional_directory:
; in: ecx -> dir name+dir path (128)
mov al, 1
xchg [addDirSeal], al
test al, al
jnz @b
mov esi, ecx
mov edi, sysdir_name1
mov ecx, 64
rep movsb ; copying fake directory name
mov byte [edi-1], 0
mov cl, 63
call cp866toUTF8_string
mov byte [edi], 0
mov [full_file_name_table.size], 2
ret
.get:
; in: ecx -> buffer, edx = length, eax = encoding
stdcall is_region_userspace, ecx, edx
jnz @f
; if illegal buffer given
xor edx, edx
jmp .ret
@@:
mov esi, edi
inc esi
mov edi, ecx
cmp edx, maxPathLength
jc @f
mov edx, maxPathLength
@@:
mov ecx, edx
jecxz .ret
cmp eax, 2
jz .get16
cmp eax, 3
jz .get8
@@:
dec ecx
js @f
call utf8to16
call uni2ansi_char
stosb
test al, al
jnz @b
sub edx, ecx
@@:
mov byte [edi-1], 0
.ret:
mov [esp+32], edx
ret
.get8:
push edi
mov edi, esi
xor eax, eax
repnz scasb
sub edx, ecx
mov ecx, edx
pop edi
rep movsb
jmp @b
.get16:
shr ecx, 1
shr edx, 1
@@:
dec ecx
js @f
call utf8to16
stosw
test ax, ax
jnz @b
sub edx, ecx
@@:
shl edx, 1
mov word [edi-2], 0
jmp .ret
.set:
mov esi, ecx
getFullPath:
; in: esi -> file path, eax = string encoding, edi -> destination
; out: UTF-8 string (with marker), eax = length, 0 -> error
test eax, eax
jnz @f
cmp byte [esi], 4
jnc @f
cmp byte [esi], 0
jz @f
lodsb
@@:
cmp byte [esi], '/'
jnz .relative
cmp eax, 2
jnz @f
cmp word [esi], '/'
jnz .relative
inc esi
inc esi
jmp .start
@@:
inc esi
cmp byte [esi], 4
jnc .start
lodsb
cmp byte [esi], '/'
jnz .start
inc esi
.start:
push eax edi
call process_replace_file_name
mov edi, [esp]
mov ecx, maxPathLength
mov al, 3
mov ah, '/'
stosw
sub ecx, 2
test ebp, ebp
jz .absolute
@@:
lodsb
stosb
dec ecx
test al, al
jnz @b
mov esi, ebp
dec edi
.absolute:
cmp byte [esp+4], 2
jz .utf16
cmp byte [esp+4], 3
jz .utf8
call cp866toUTF8_string
jns .end
jmp .fail
.utf8:
dec ecx
js .fail
lodsb
stosb
test al, al
jz .end
jmp .utf8
.utf16:
call UTF16to8_string
jns .end
.fail:
mov byte [edi], 0
pop eax eax
xor eax, eax
ret
.relative:
push eax edi
mov ebx, esi
mov edi, [current_slot]
mov edi, [edi+APPDATA.cur_dir]
mov edx, edi
mov ecx, maxPathLength
xor eax, eax
repnz scasb
mov esi, edi
mov edi, [esp]
jecxz .fail
cmp byte [ebx], 0
jz .set_ok
dec esi
cmp edx, edi ; is destination equal to cur_dir?
mov edi, esi
jz @f
mov edi, [esp]
mov ecx, esi
sub ecx, edx
mov esi, edx
mov edx, edi
rep movsb
@@:
mov byte [edi], '/'
inc edi
mov esi, ebx
mov ecx, edx
add ecx, maxPathLength
sub ecx, edi
jmp .absolute
.set_ok:
cmp edx, edi ; is destination equal to cur_dir?
jz @f
mov ecx, esi
sub ecx, edx
mov esi, edx
rep movsb
@@:
pop eax
sub edi, eax
pop eax
mov eax, edi
ret
.end:
or ecx, -1
mov edi, [esp]
xor eax, eax
push edi
repnz scasb
not ecx
pop edi
.parse:
mov al, '/'
repnz scasb
jecxz @b
cmp byte [edi], '.'
jnz .parse
mov esi, edi
@@:
lodsw
sub ecx, 2
cmp ax, './'
jz @b
cmp ax, '..'
jnz @f
cmp byte [esi], '/'
jnz @f
mov edx, ecx
mov ecx, edi
sub ecx, [esp]
sub ecx, 2
jc .fail
sub edi, 2
lodsb
dec edx
std
repnz scasb
cld
add edi, 2
mov ecx, edx
jmp @b
@@:
sub esi, 2
add ecx, 2
cmp esi, edi
jz .parse
push edi ecx
rep movsb
pop ecx edi
jmp .parse
include "parse_fn.inc"
include "fs_common.inc"
include "iso9660.inc" ; read for CD filesystem
include "fat.inc"
include "ntfs.inc"
include "ext.inc"
include "xfs.asm"