Subversion Repositories Kolibri OS

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;;                                                              ;;

;; Copyright (C) KolibriOS team 2004-2011. 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: 2455 $

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

; à ìîæåò áûòü, âîçâðàùàòü äðóãîé êîä îøèáêè?

        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:

;    ÏÅÐÅÂÎÄ ÑÒÐÎÊÎÂÎÃÎ ×ÈÑËÀ  ×ÈÑËÎÂÎÉ ÂÈÄ

;    Âõîä:

;        EDI - àäðåñ ñòðîêè ñ ÷èñëîì. Êîíåö ÷èñëà îòìå÷åí êîäîì 0Dh

;    Âûõîä:

;        CF - èíäèêàòîð îøèáîê:

;            0 - îøèáîê íåò;

;            1 - îøèáêà

;        Åñëè CF=0, òî AX - ÷èñëî.

        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