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kolibrios/kernel/trunk/fs/fs.inc
CleverMouse 037099f50d Style corrected for new rules, no semantic changes 
git-svn-id: svn://kolibrios.org@2288 a494cfbc-eb01-0410-851d-a64ba20cac60
2011-10-14 21:38:50 +00:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; ;;
;; System service for filesystem call ;;
;; (C) 2004 Ville Turjanmaa, License: GPL ;;
;; 29.04.2006 Elimination of hangup after the ;;
;; expiration hd_wait_timeout (for LBA) - Mario79 ;;
;; 15.01.2005 get file size/attr/date, ;;
;; file_append (only for hd) - ATV ;;
;; 23.11.2004 test if hd/partition is set - ATV ;;
;; 18.11.2004 get_disk_info and more error codes - ATV ;;
;; 08.11.2004 expand_pathz and rename (only for hd) - ATV ;;
;; 20.10.2004 Makedir/Removedir (only for hd) - ATV ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
iglobal
dir0:
db 'HARDDISK '
db 'RAMDISK '
db 'FLOPPYDISK '
db 0
dir1:
db 'FIRST '
db 'SECOND '
db 'THIRD '
db 'FOURTH '
db 0
not_select_IDE db 0
hd_address_table:
dd 0x1f0,0x00,0x1f0,0x10
dd 0x170,0x00,0x170,0x10
endg
file_system:
; IN:
;
; eax = 0 ; read file /RamDisk/First 6
; eax = 8 ; lba read
; eax = 15 ; get_disk_info
;
; OUT:
;
; eax = 0 : read ok
; eax = 1 : no hd base and/or partition defined
; eax = 2 : function is unsupported for this FS
; eax = 3 : unknown FS
; eax = 4 : partition not defined at hd
; eax = 5 : file not found
; eax = 6 : end of file
; eax = 7 : memory pointer not in application area
; eax = 8 : disk full
; eax = 9 : fat table corrupted
; eax = 10 : access denied
; eax = 11 : disk error
;
; ebx = size
; \begin{diamond}[18.03.2006]
; for subfunction 16 (start application) error codes must be negative
; because positive values are valid PIDs
; so possible return values are:
; eax > 0 : process created, eax=PID
; -0x10 <= eax < 0 : -eax is filesystem error code:
; eax = -1 = 0xFFFFFFFF : no hd base and/or partition defined
; eax = -3 = 0xFFFFFFFD : unknown FS
; eax = -5 = 0xFFFFFFFB : file not found
; eax = -6 = 0xFFFFFFFA : unexpected end of file (probably not executable file)
; eax = -9 = 0xFFFFFFF7 : fat table corrupted
; eax = -10 = 0xFFFFFFF6 : access denied
; -0x20 <= eax < -0x10: eax is process creation error code:
; eax = -0x20 = 0xFFFFFFE0 : too many processes
; eax = -0x1F = 0xFFFFFFE1 : not Menuet/Kolibri executable
; eax = -0x1E = 0xFFFFFFE2 : no memory
; ebx is not changed
; \end{diamond}[18.03.2006]
; Extract parameters
; add eax, std_application_base_address ; abs start of info block
cmp dword [eax+0], 15; GET_DISK_INFO
je fs_info
cmp dword [CURRENT_TASK], 1; no memory checks for kernel requests
jz no_checks_for_kernel
mov edx, eax
cmp dword [eax+0], 1
jnz .usual_check
mov ebx, [eax+12]
; add ebx,std_application_base_address
mov ecx, [eax+8]
call check_region
test eax, eax
jnz area_in_app_mem
.error_output:
mov esi, buffer_failed
call sys_msg_board_str
; mov eax,7
mov dword [esp+36], 7
ret
iglobal
buffer_failed db 'K : Buffer check failed',13,10,0
endg
.usual_check:
cmp dword [eax+0], 0
mov ecx, 512
jnz .small_size
mov ecx, [eax+8]
shl ecx, 9
.small_size:
mov ebx, [eax+12]
; add ebx,std_application_base_address
call check_region
test eax, eax
jz .error_output
area_in_app_mem:
mov eax, edx
no_checks_for_kernel:
fs_read:
mov ebx, [eax+20] ; program wants root directory ?
test bl, bl
je fs_getroot
test bh, bh
jne fs_noroot
fs_getroot:
; \begin{diamond}[18.03.2006]
; root - only read is allowed
; other operations return "access denied", eax=10
; (execute operation returns eax=-10)
cmp dword [eax], 0
jz .read_root
mov dword [esp+36], 10
ret
.read_root:
; \end{diamond}[18.03.2006]
mov esi, dir0
mov edi, [eax+12]
; add edi,std_application_base_address
mov ecx, 11
push ecx
; cld ; already is
rep movsb
mov al, 0x10
stosb
add edi, 32-11-1
pop ecx
rep movsb
stosb
and dword [esp+36], 0; ok read
mov dword [esp+24], 32*2; size of root
ret
fs_info: ;start of code - Mihasik
push eax
cmp [eax+21], byte 'h'
je fs_info_h
cmp [eax+21], byte 'H'
je fs_info_h
cmp [eax+21], byte 'r'
je fs_info_r
cmp [eax+21], byte 'R'
je fs_info_r
mov eax, 3 ;if unknown disk
xor ebx, ebx
xor ecx, ecx
xor edx, edx
jmp fs_info1
fs_info_r:
call ramdisk_free_space;if ramdisk
mov ecx, edi ;free space in ecx
shr ecx, 9 ;free clusters
mov ebx, 2847 ;total clusters
mov edx, 512 ;cluster size
xor eax, eax ;always 0
jmp fs_info1
fs_info_h: ;if harddisk
call get_hd_info
fs_info1:
pop edi
mov [esp+36], eax
mov [esp+24], ebx ; total clusters on disk
mov [esp+32], ecx ; free clusters on disk
mov [edi], edx ; cluster size in bytes
ret ;end of code - Mihasik
fs_noroot:
push dword [eax+0] ; read/write/delete/.../makedir/rename/lba/run
push dword [eax+4] ; 512 block number to read
push dword [eax+8] ; bytes to write/append or 512 blocks to read
mov ebx, [eax+12]
; add ebx,std_application_base_address
push ebx ; abs start of return/save area
lea esi, [eax+20] ; abs start of dir + filename
mov edi, [eax+16]
; add edi,std_application_base_address ; abs start of work area
call expand_pathz
push edi ; dir start
push ebx ; name of file start
mov eax, [edi+1]
cmp eax, 'RD '
je fs_yesramdisk
cmp eax, 'RAMD'
jne fs_noramdisk
fs_yesramdisk:
cmp byte [edi+1+11], 0
je fs_give_dir1
mov eax, [edi+1+12]
cmp eax, '1 '
je fs_yesramdisk_first
cmp eax, 'FIRS'
jne fs_noramdisk
fs_yesramdisk_first:
cmp dword [esp+20], 8; LBA read ramdisk
jne fs_no_LBA_read_ramdisk
mov eax, [esp+16] ; LBA block to read
mov ecx, [esp+8] ; abs pointer to return area
call LBA_read_ramdisk
jmp file_system_return
fs_no_LBA_read_ramdisk:
cmp dword [esp+20], 0; READ
jne fs_noramdisk_read
mov eax, [esp+4] ; fname
add eax, 2*12+1
mov ebx, [esp+16] ; block start
inc ebx
mov ecx, [esp+12] ; block count
mov edx, [esp+8] ; return
mov esi, [esp+0]
sub esi, eax
add esi, 12+1 ; file name length
call fileread
jmp file_system_return
fs_noramdisk_read:
fs_noramdisk:
;********************************************************************
mov eax, [edi+1]
cmp eax, 'FD '
je fs_yesflpdisk
cmp eax, 'FLOP'
jne fs_noflpdisk
fs_yesflpdisk:
call reserve_flp
cmp byte [edi+1+11], 0
je fs_give_dir1
mov eax, [edi+1+12]
cmp eax, '1 '
je fs_yesflpdisk_first
cmp eax, 'FIRS'
je fs_yesflpdisk_first
cmp eax, '2 '
je fs_yesflpdisk_second
cmp eax, 'SECO'
jne fs_noflpdisk
jmp fs_yesflpdisk_second
fs_yesflpdisk_first:
mov [flp_number], 1
jmp fs_yesflpdisk_start
fs_yesflpdisk_second:
mov [flp_number], 2
fs_yesflpdisk_start:
cmp dword [esp+20], 0; READ
jne fs_noflpdisk_read
mov eax, [esp+4] ; fname
add eax, 2*12+1
mov ebx, [esp+16] ; block start
inc ebx
mov ecx, [esp+12] ; block count
mov edx, [esp+8] ; return
mov esi, [esp+0]
sub esi, eax
add esi, 12+1 ; file name length
call floppy_fileread
jmp file_system_return
fs_noflpdisk_read:
fs_noflpdisk:
;*****************************************************************
mov eax, [edi+1]
cmp eax, 'HD0 '
je fs_yesharddisk_IDE0
cmp eax, 'HD1 '
je fs_yesharddisk_IDE1
cmp eax, 'HD2 '
je fs_yesharddisk_IDE2
cmp eax, 'HD3 '
je fs_yesharddisk_IDE3
jmp old_path_harddisk
fs_yesharddisk_IDE0:
call reserve_hd1
mov [hdbase], 0x1f0
mov [hdid], 0x0
mov [hdpos], 1
jmp fs_yesharddisk_partition
fs_yesharddisk_IDE1:
call reserve_hd1
mov [hdbase], 0x1f0
mov [hdid], 0x10
mov [hdpos], 2
jmp fs_yesharddisk_partition
fs_yesharddisk_IDE2:
call reserve_hd1
mov [hdbase], 0x170
mov [hdid], 0x0
mov [hdpos], 3
jmp fs_yesharddisk_partition
fs_yesharddisk_IDE3:
call reserve_hd1
mov [hdbase], 0x170
mov [hdid], 0x10
mov [hdpos], 4
fs_yesharddisk_partition:
call reserve_hd_channel
; call choice_necessity_partition
; jmp fs_yesharddisk_all
jmp fs_for_new_semantic
choice_necessity_partition:
mov eax, [edi+1+12]
call StringToNumber
mov [fat32part], eax
choice_necessity_partition_1:
mov ecx, [hdpos]
xor eax, eax
mov [hd_entries], eax; entries in hd cache
mov edx, DRIVE_DATA+2
cmp ecx, 0x80
jb search_partition_array
mov ecx, 4
search_partition_array:
mov bl, [edx]
movzx ebx, bl
add eax, ebx
inc edx
loop search_partition_array
mov ecx, [hdpos]
mov edx, BiosDiskPartitions
sub ecx, 0x80
jb .s
je .f
@@:
mov ebx, [edx]
add edx, 4
add eax, ebx
loop @b
jmp .f
.s:
sub eax, ebx
.f:
add eax, [known_part]; add eax,[fat32part]
dec eax
xor edx, edx
imul eax, 100
add eax, DRIVE_DATA+0xa
mov [transfer_adress], eax
call partition_data_transfer_1
ret
old_path_harddisk:
mov eax, [edi+1]
cmp eax, 'HD '
je fs_yesharddisk
cmp eax, 'HARD'
jne fs_noharddisk
fs_yesharddisk:
cmp dword [esp+20], 8; LBA read
jne fs_no_LBA_read
mov eax, [esp+16] ; LBA block to read
lea ebx, [edi+1+12] ; pointer to FIRST/SECOND/THIRD/FOURTH
mov ecx, [esp+8] ; abs pointer to return area
call LBA_read
jmp file_system_return
fs_no_LBA_read:
cmp byte [edi+1+11], 0; directory read
je fs_give_dir1
call reserve_hd1
fs_for_new_semantic:
call choice_necessity_partition
fs_yesharddisk_all:
mov eax, 1
mov ebx, [esp+24+24]
cmp [hdpos], 0 ; is hd base set?
jz hd_err_return
cmp [fat32part], 0 ; is partition set?
jnz @f
hd_err_return:
call free_hd_channel
and [hd1_status], 0
jmp file_system_return
@@:
cmp dword [esp+20], 0; READ
jne fs_noharddisk_read
mov eax, [esp+0] ; /fname
lea edi, [eax+12]
mov byte [eax], 0 ; path to asciiz
inc eax ; filename start
mov ebx, [esp+12] ; count to read
mov ecx, [esp+8] ; buffer
mov edx, [esp+4]
add edx, 12*2 ; dir start
sub edi, edx ; path length
mov esi, [esp+16] ; blocks to read
call file_read
mov edi, [esp+0]
mov byte [edi], '/'
call free_hd_channel
and [hd1_status], 0
jmp file_system_return
fs_noharddisk_read:
call free_hd_channel
and [hd1_status], 0
fs_noharddisk:
; \begin{diamond}[18.03.2006]
mov eax, 5 ; file not found
; <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>?
mov ebx, [esp+24+24]; do not change ebx in application
; \end{diamond}[18.03.2006]
file_system_return:
add esp, 24
mov [esp+36], eax
mov [esp+24], ebx
ret
fs_give_dir1:
; \begin{diamond}[18.03.2006]
; /RD,/FD,/HD - only read is allowed
; other operations return "access denied", eax=10
; (execute operation returns eax=-10)
cmp dword [esp+20], 0
jz .read
add esp, 20
pop ecx
mov dword [esp+36], 10
ret
.read:
; \end{diamond}[18.03.2006]
mov al, 0x10
mov ebx, 1
mov edi, [esp+8]
mov esi, dir1
fs_d1_new:
mov ecx, 11
; cld
rep movsb
stosb
add edi, 32-11-1
dec ebx
jne fs_d1_new
add esp, 24
and dword [esp+36], 0; ok read
mov dword [esp+24], 32*1; dir/data size
ret
LBA_read_ramdisk:
cmp [lba_read_enabled], 1
je lbarrl1
xor ebx, ebx
mov eax, 2
ret
lbarrl1:
cmp eax, 18*2*80
jb lbarrl2
xor ebx, ebx
mov eax, 3
ret
lbarrl2:
pushad
call restorefatchain
mov edi, ecx
mov esi, eax
shl esi, 9
add esi, RAMDISK
mov ecx, 512/4
; cld
rep movsd
popad
xor ebx, ebx
xor eax, eax
ret
LBA_read:
; IN:
;
; eax = LBA block to read
; ebx = pointer to FIRST/SECOND/THIRD/FOURTH
; ecx = abs pointer to return area
cmp [lba_read_enabled], 1
je lbarl1
mov eax, 2
ret
lbarl1:
call reserve_hd1
push eax
push ecx
mov edi, hd_address_table
mov esi, dir1
mov eax, [ebx]
mov edx, '1 '
mov ecx, 4
blar0:
cmp eax, [esi]
je blar2
cmp eax, edx
je blar2
inc edx
add edi, 8
add esi, 11
dec ecx
jnz blar0
mov eax, 1
mov ebx, 1
jmp LBA_read_ret
blar2:
mov eax, [edi+0]
mov ebx, [edi+4]
mov [hdbase], eax
mov [hdid], ebx
call wait_for_hd_idle
cmp [hd_error], 0
jne hd_lba_error
; eax = hd port
; ebx = set for primary (0x00) or slave (0x10)
cli
mov edx, eax
inc edx
xor eax, eax
out dx, al
inc edx
inc eax
out dx, al
inc edx
mov eax, [esp+4]
out dx, al
shr eax, 8
inc edx
out dx, al
shr eax, 8
inc edx
out dx, al
shr eax, 8
inc edx
and al, 1+2+4+8
add al, bl
add al, 128+64+32
out dx, al
inc edx
mov al, 20h
out dx, al
sti
call wait_for_sector_buffer
cmp [hd_error], 0
jne hd_lba_error
cli
mov edi, [esp+0]
mov ecx, 256
sub edx, 7
cld
rep insw
sti
xor eax, eax
xor ebx, ebx
LBA_read_ret:
mov [hd_error], 0
mov [hd1_status], 0
add esp, 2*4
ret
expand_pathz:
; IN:
; esi = asciiz path & file
; edi = buffer for path & file name
; OUT:
; edi = directory & file : / 11 + / 11 + / 11 - zero terminated
; ebx = /file name - zero terminated
; esi = pointer after source
push eax
push ecx
push edi;[esp+0]
pathz_start:
mov byte [edi], '/'
inc edi
mov al, 32
mov ecx, 11
cld
rep stosb ; clear filename area
sub edi, 11
mov ebx, edi ; start of dir/file name
pathz_new_char:
mov al, [esi]
inc esi
cmp al, 0
je pathz_end
cmp al, '/'
jne pathz_not_path
cmp edi, ebx ; skip first '/'
jz pathz_new_char
lea edi, [ebx+11] ; start of next directory
jmp pathz_start
pathz_not_path:
cmp al, '.'
jne pathz_not_ext
lea edi, [ebx+8] ; start of extension
jmp pathz_new_char
pathz_not_ext:
cmp al, 'a'
jb pathz_not_low
cmp al, 'z'
ja pathz_not_low
sub al, 0x20 ; char to uppercase
pathz_not_low:
mov [edi], al
inc edi
mov eax, [esp+0] ; start_of_dest_path
add eax, 512 ; keep maximum path under 512 bytes
cmp edi, eax
jb pathz_new_char
pathz_end:
cmp ebx, edi ; if path end with '/'
jnz pathz_put_zero ; go back 1 level
sub ebx, 12
pathz_put_zero:
mov byte [ebx+11], 0
dec ebx ; include '/' char into file name
pop edi
pop ecx
pop eax
ret
;*******************************************
;* string to number
;* input eax - 4 byte string
;* output eax - number
;*******************************************
StringToNumber:
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
; EDI - <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 0Dh
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
; CF - <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:
; 0 - <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>;
; 1 - <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
; <EFBFBD><EFBFBD><EFBFBD><EFBFBD> CF=0, <EFBFBD><EFBFBD> AX - <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>.
push bx
push cx
push dx
push edi
mov [partition_string], eax
mov edi, partition_string
xor cx, cx
i1:
mov al, [edi]
cmp al, 32;13
je i_exit
; cmp al,'0'
; jb err
; cmp al,'9'
; ja err
sub al, 48
shl cx, 1
jc error
mov bx, cx
shl cx, 1
jc error
shl cx, 1
jc error
add cx, bx
jc error
cbw
add cx, ax
jc error
i3:
inc edi
jmp i1
i_exit:
mov ax, cx
clc
i4:
movzx eax, ax
pop edi
pop dx
pop cx
pop bx
ret
error:
stc
jmp i4
partition_string:
dd 0
db 32
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