forked from KolibriOS/kolibrios
1164 lines
30 KiB
PHP
1164 lines
30 KiB
PHP
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision $
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ERROR_SUCCESS = 0
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ERROR_DISK_BASE = 1
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ERROR_UNSUPPORTED_FS = 2
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ERROR_UNKNOWN_FS = 3
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ERROR_PARTITION = 4
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ERROR_FILE_NOT_FOUND = 5
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ERROR_END_OF_FILE = 6
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ERROR_MEMORY_POINTER = 7
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ERROR_DISK_FULL = 8
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ERROR_FAT_TABLE = 9 ;deprecated
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ERROR_FS_FAIL = 9
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ERROR_ACCESS_DENIED = 10
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ERROR_DEVICE = 11
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image_of_eax EQU esp+32
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image_of_ebx EQU esp+20
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; System function 70 - files with long names (LFN)
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; diamond, 2006
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iglobal
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; in this table names must be in lowercase
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rootdirs:
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db 2,'rd'
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dd fs_OnRamdisk
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dd fs_NextRamdisk
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db 7,'ramdisk'
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dd fs_OnRamdisk
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dd fs_NextRamdisk
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db 2,'fd'
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dd fs_OnFloppy
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dd fs_NextFloppy
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db 10,'floppydisk'
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dd fs_OnFloppy
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dd fs_NextFloppy
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db 3,'hd0'
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dd fs_OnHd0
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dd fs_NextHd0
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db 3,'hd1'
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dd fs_OnHd1
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dd fs_NextHd1
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db 3,'hd2'
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dd fs_OnHd2
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dd fs_NextHd2
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db 3,'hd3'
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dd fs_OnHd3
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dd fs_NextHd3
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;**********************************************
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db 3,'cd0'
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dd fs_OnCd0
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dd fs_NextCd
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db 3,'cd1'
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dd fs_OnCd1
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dd fs_NextCd
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db 3,'cd2'
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dd fs_OnCd2
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dd fs_NextCd
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db 3,'cd3'
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dd fs_OnCd3
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dd fs_NextCd
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;***********************************************
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db 0
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virtual_root_query:
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dd fs_HasRamdisk
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db 'rd',0
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dd fs_HasFloppy
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db 'fd',0
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dd fs_HasHd0
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db 'hd0',0
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dd fs_HasHd1
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db 'hd1',0
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dd fs_HasHd2
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db 'hd2',0
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dd fs_HasHd3
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db 'hd3',0
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;**********************************************
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dd fs_HasCd0
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db 'cd0',0
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dd fs_HasCd1
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db 'cd1',0
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dd fs_HasCd2
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db 'cd2',0
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dd fs_HasCd3
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db 'cd3',0
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;**********************************************
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dd 0
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fs_additional_handlers:
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dd biosdisk_handler, biosdisk_enum_root
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dd dyndisk_handler, dyndisk_enum_root
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; add new handlers here
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dd 0
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endg
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file_system_lfn:
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; in: ebx->fileinfo block
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; operation codes:
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; 0 : read file
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; 1 : read folder
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; 2 : create/rewrite file
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; 3 : write/append to file
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; 4 : set end of file
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; 5 : get file/directory attributes structure
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; 6 : set file/directory attributes structure
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; 7 : start application
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; 8 : delete file
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; 9 : create directory
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; parse file name
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lea esi, [ebx+20]
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lodsb
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test al, al
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jnz @f
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mov esi, [esi]
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lodsb
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@@:
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cmp al, '/'
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jz .notcurdir
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dec esi
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mov ebp, esi
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test al, al
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jnz @f
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xor ebp, ebp
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@@:
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mov esi, [current_slot]
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mov esi, [esi+APPDATA.cur_dir]
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jmp .parse_normal
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.notcurdir:
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cmp byte [esi], 0
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jz .rootdir
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call process_replace_file_name
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.parse_normal:
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cmp dword [ebx], 7
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jne @F
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mov edx, [ebx+4]
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mov ebx, [ebx+8]
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call fs_execute; esi+ebp, ebx, edx
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mov [image_of_eax], eax
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ret
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@@:
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mov edi, rootdirs-8
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xor ecx, ecx
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push esi
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.scan1:
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pop esi
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add edi, ecx
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scasd
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scasd
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mov cl, byte [edi]
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test cl, cl
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jz .notfound_try
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inc edi
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push esi
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@@:
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lodsb
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or al, 20h
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scasb
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loopz @b
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jnz .scan1
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lodsb
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cmp al, '/'
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jz .found1
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test al, al
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jnz .scan1
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pop eax
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; directory /xxx
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.maindir:
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mov esi, [edi+4]
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.maindir_noesi:
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cmp dword [ebx], 1
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jnz .access_denied
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xor eax, eax
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mov ebp, [ebx+12] ;количество блоков для считывания
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mov edx, [ebx+16] ;куда записывать рузельтат
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; add edx, std_application_base_address
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push dword [ebx+4] ; first block
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mov ebx, [ebx+8] ; flags
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; ebx=flags, [esp]=first block, ebp=number of blocks, edx=return area, esi='Next' handler
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mov edi, edx
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push ecx
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mov ecx, 32/4
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rep stosd
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pop ecx
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mov byte [edx], 1 ; version
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.maindir_loop:
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call esi
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jc .maindir_done
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inc dword [edx+8]
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dec dword [esp]
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jns .maindir_loop
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dec ebp
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js .maindir_loop
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inc dword [edx+4]
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mov dword [edi], 0x10 ; attributes: folder
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mov dword [edi+4], 1 ; name type: UNICODE
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push eax
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xor eax, eax
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add edi, 8
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push ecx
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mov ecx, 40/4-2
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rep stosd
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pop ecx
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pop eax
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push eax edx
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; convert number in eax to decimal UNICODE string
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push edi
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push ecx
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push -'0'
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mov ecx, 10
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@@:
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xor edx, edx
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div ecx
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push edx
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test eax, eax
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jnz @b
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@@:
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pop eax
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add al, '0'
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stosb
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test bl, 1 ; UNICODE name?
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jz .ansi2
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mov byte [edi], 0
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inc edi
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.ansi2:
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test al, al
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jnz @b
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mov byte [edi-1], 0
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pop ecx
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pop edi
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; UNICODE name length is 520 bytes, ANSI - 264
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add edi, 520
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test bl, 1
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jnz @f
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sub edi, 520-264
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@@:
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pop edx eax
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jmp .maindir_loop
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.maindir_done:
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pop eax
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mov ebx, [edx+4]
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xor eax, eax
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dec ebp
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js @f
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mov al, ERROR_END_OF_FILE
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@@:
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mov [image_of_eax], eax
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mov [image_of_ebx], ebx
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ret
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; directory /
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.rootdir:
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cmp dword [ebx], 1 ; read folder?
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jz .readroot
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.access_denied:
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mov dword [image_of_eax], 10 ; access denied
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ret
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.readroot:
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; virtual root folder - special handler
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mov esi, virtual_root_query
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mov ebp, [ebx+12]
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mov edx, [ebx+16]
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; add edx, std_application_base_address
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push dword [ebx+4] ; first block
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mov ebx, [ebx+8] ; flags
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xor eax, eax
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; eax=0, [esp]=first block, ebx=flags, ebp=number of blocks, edx=return area
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mov edi, edx
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mov ecx, 32/4
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rep stosd
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mov byte [edx], 1 ; version
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.readroot_loop:
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cmp dword [esi], eax
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jz .readroot_done_static
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call dword [esi]
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add esi, 4
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test eax, eax
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jnz @f
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.readroot_next:
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or ecx, -1
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xchg esi, edi
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repnz scasb
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xchg esi, edi
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jmp .readroot_loop
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@@:
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xor eax, eax
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inc dword [edx+8]
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dec dword [esp]
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jns .readroot_next
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dec ebp
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js .readroot_next
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inc dword [edx+4]
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mov dword [edi], 0x10 ; attributes: folder
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mov dword [edi+4], ebx ; name type: UNICODE
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add edi, 8
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mov ecx, 40/4-2
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rep stosd
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push edi
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@@:
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lodsb
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stosb
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test bl, 1
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jz .ansi
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mov byte [edi], 0
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inc edi
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.ansi:
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test eax, eax
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jnz @b
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pop edi
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add edi, 520
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test bl, 1
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jnz .readroot_loop
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sub edi, 520-264
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jmp .readroot_loop
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.readroot_done_static:
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mov esi, fs_additional_handlers-8
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sub esp, 16
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.readroot_ah_loop:
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add esi, 8
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cmp dword [esi], 0
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jz .readroot_done
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xor eax, eax
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.readroot_ah_loop2:
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push edi
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lea edi, [esp+4]
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call dword [esi+4]
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pop edi
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test eax, eax
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jz .readroot_ah_loop
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inc dword [edx+8]
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dec dword [esp+16]
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jns .readroot_ah_loop2
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dec ebp
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js .readroot_ah_loop2
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push eax
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xor eax, eax
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inc dword [edx+4]
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mov dword [edi], 0x10 ; attributes: folder
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mov dword [edi+4], ebx
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add edi, 8
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mov ecx, 40/4-2
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rep stosd
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push esi edi
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lea esi, [esp+12]
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@@:
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lodsb
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stosb
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test bl, 1
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jz .ansi3
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mov byte [edi], 0
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inc edi
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.ansi3:
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test al, al
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jnz @b
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pop edi esi eax
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add edi, 520
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test bl, 1
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jnz .readroot_ah_loop2
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sub edi, 520-264
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jmp .readroot_ah_loop2
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.readroot_done:
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add esp, 16
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pop eax
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mov ebx, [edx+4]
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xor eax, eax
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dec ebp
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js @f
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mov al, ERROR_END_OF_FILE
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@@:
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mov [image_of_eax], eax
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mov [image_of_ebx], ebx
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ret
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.notfound_try:
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mov edi, fs_additional_handlers
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@@:
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cmp dword [edi], 0
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jz .notfound
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call dword [edi]
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scasd
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scasd
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jmp @b
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.notfound:
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mov dword [image_of_eax], ERROR_FILE_NOT_FOUND
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and dword [image_of_ebx], 0
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ret
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.notfounda:
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cmp edi, esp
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jnz .notfound
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call dword [edi+4]
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add esp, 16
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jmp .notfound
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.found1:
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pop eax
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cmp byte [esi], 0
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jz .maindir
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.found2:
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; read partition number
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xor ecx, ecx
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xor eax, eax
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@@:
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lodsb
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cmp al, '/'
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jz .done1
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test al, al
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jz .done1
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sub al, '0'
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cmp al, 9
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ja .notfounda
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lea ecx, [ecx*5]
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lea ecx, [ecx*2+eax]
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jmp @b
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.done1:
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jecxz .notfounda
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test al, al
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jnz @f
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dec esi
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@@:
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cmp byte [esi], 0
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jnz @f
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test ebp, ebp
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jz @f
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mov esi, ebp
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xor ebp, ebp
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@@:
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; now [edi] contains handler address, ecx - partition number,
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; esi points to ASCIIZ string - rest of name
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jmp dword [edi]
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; handlers for devices
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; in: ecx = 0 => query virtual directory /xxx
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; in: ecx = partition number
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; esi -> relative (for device) name
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; ebx -> fileinfo
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; ebp = 0 or pointer to rest of name from folder addressed by esi
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; out: [image_of_eax]=image of eax, [image_of_ebx]=image of ebx
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fs_OnRamdisk:
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cmp ecx, 1
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jnz file_system_lfn.notfound
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mov eax, [ebx]
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cmp eax, fs_NumRamdiskServices
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jae .not_impl
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mov ecx, [ebx+12]
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mov edx, [ebx+16]
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; add edx, std_application_base_address
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add ebx, 4
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call dword [fs_RamdiskServices + eax*4]
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mov [image_of_eax], eax
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mov [image_of_ebx], ebx
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ret
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.not_impl:
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mov dword [image_of_eax], 2 ; not implemented
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ret
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fs_NotImplemented:
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mov eax, 2
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ret
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fs_RamdiskServices:
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dd fs_RamdiskRead
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dd fs_RamdiskReadFolder
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dd fs_RamdiskRewrite
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dd fs_RamdiskWrite
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dd fs_RamdiskSetFileEnd
|
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dd fs_RamdiskGetFileInfo
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dd fs_RamdiskSetFileInfo
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dd 0
|
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dd fs_RamdiskDelete
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dd fs_RamdiskCreateFolder
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fs_NumRamdiskServices = ($ - fs_RamdiskServices)/4
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|
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fs_OnFloppy:
|
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cmp ecx, 2
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ja file_system_lfn.notfound
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mov eax, [ebx]
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cmp eax, fs_NumFloppyServices
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jae fs_OnRamdisk.not_impl
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call reserve_flp
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mov [flp_number], cl
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mov ecx, [ebx+12]
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mov edx, [ebx+16]
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; add edx, std_application_base_address
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add ebx, 4
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call dword [fs_FloppyServices + eax*4]
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and [flp_status], 0
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mov [image_of_eax], eax
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mov [image_of_ebx], ebx
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ret
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|
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fs_FloppyServices:
|
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dd fs_FloppyRead
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dd fs_FloppyReadFolder
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dd fs_FloppyRewrite
|
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dd fs_FloppyWrite
|
|
dd fs_FloppySetFileEnd
|
|
dd fs_FloppyGetFileInfo
|
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dd fs_FloppySetFileInfo
|
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dd 0
|
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dd fs_FloppyDelete
|
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dd fs_FloppyCreateFolder
|
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fs_NumFloppyServices = ($ - fs_FloppyServices)/4
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|
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fs_OnHd0:
|
|
call reserve_hd1
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mov [hdbase], 0x1F0
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mov [hdid], 0
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|
push 1
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jmp fs_OnHd
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fs_OnHd1:
|
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call reserve_hd1
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mov [hdbase], 0x1F0
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mov [hdid], 0x10
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push 2
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jmp fs_OnHd
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|
fs_OnHd2:
|
|
call reserve_hd1
|
|
mov [hdbase], 0x170
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mov [hdid], 0
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|
push 3
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jmp fs_OnHd
|
|
fs_OnHd3:
|
|
call reserve_hd1
|
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mov [hdbase], 0x170
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mov [hdid], 0x10
|
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push 4
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fs_OnHd:
|
|
call reserve_hd_channel
|
|
pop eax
|
|
mov [hdpos], eax
|
|
cmp ecx, 0x100
|
|
jae fs_OnHdAndBd.nf
|
|
cmp cl, [DRIVE_DATA+1+eax]
|
|
fs_OnHdAndBd:
|
|
jbe @f
|
|
.nf:
|
|
call free_hd_channel
|
|
and [hd1_status], 0
|
|
mov dword [image_of_eax], 5 ; not found
|
|
ret
|
|
@@:
|
|
mov [known_part], ecx ; mov [fat32part], ecx
|
|
push ebx esi
|
|
call choice_necessity_partition_1
|
|
pop esi ebx
|
|
mov ecx, [ebx+12]
|
|
mov edx, [ebx+16]
|
|
; add edx, std_application_base_address
|
|
mov eax, [ebx]
|
|
cmp eax, fs_NumHdServices
|
|
jae .not_impl
|
|
add ebx, 4
|
|
call dword [fs_HdServices + eax*4]
|
|
call free_hd_channel
|
|
and [hd1_status], 0
|
|
mov [image_of_eax], eax
|
|
mov [image_of_ebx], ebx
|
|
ret
|
|
.not_impl:
|
|
call free_hd_channel
|
|
and [hd1_status], 0
|
|
mov dword [image_of_eax], 2 ; not implemented
|
|
ret
|
|
|
|
fs_HdServices:
|
|
dd fs_HdRead
|
|
dd fs_HdReadFolder
|
|
dd fs_HdRewrite
|
|
dd fs_HdWrite
|
|
dd fs_HdSetFileEnd
|
|
dd fs_HdGetFileInfo
|
|
dd fs_HdSetFileInfo
|
|
dd 0
|
|
dd fs_HdDelete
|
|
dd fs_HdCreateFolder
|
|
fs_NumHdServices = ($ - fs_HdServices)/4
|
|
|
|
;*******************************************************
|
|
fs_OnCd0:
|
|
call reserve_cd
|
|
mov [ChannelNumber], 1
|
|
mov [DiskNumber], 0
|
|
push 6
|
|
push 1
|
|
jmp fs_OnCd
|
|
fs_OnCd1:
|
|
call reserve_cd
|
|
mov [ChannelNumber], 1
|
|
mov [DiskNumber], 1
|
|
push 4
|
|
push 2
|
|
jmp fs_OnCd
|
|
fs_OnCd2:
|
|
call reserve_cd
|
|
mov [ChannelNumber], 2
|
|
mov [DiskNumber], 0
|
|
push 2
|
|
push 3
|
|
jmp fs_OnCd
|
|
fs_OnCd3:
|
|
call reserve_cd
|
|
mov [ChannelNumber], 2
|
|
mov [DiskNumber], 1
|
|
push 0
|
|
push 4
|
|
fs_OnCd:
|
|
call reserve_cd_channel
|
|
pop eax
|
|
mov [cdpos], eax
|
|
pop eax
|
|
cmp ecx, 0x100
|
|
jae .nf
|
|
push ecx ebx
|
|
mov cl, al
|
|
mov bl, [DRIVE_DATA+1]
|
|
shr bl, cl
|
|
test bl, 2
|
|
pop ebx ecx
|
|
|
|
jnz @f
|
|
.nf:
|
|
call free_cd_channel
|
|
and [cd_status], 0
|
|
mov dword [image_of_eax], 5 ; not found
|
|
ret
|
|
@@:
|
|
mov ecx, [ebx+12]
|
|
mov edx, [ebx+16]
|
|
; add edx, std_application_base_address
|
|
mov eax, [ebx]
|
|
cmp eax, fs_NumCdServices
|
|
jae .not_impl
|
|
add ebx, 4
|
|
call dword [fs_CdServices + eax*4]
|
|
call free_cd_channel
|
|
and [cd_status], 0
|
|
mov [image_of_eax], eax
|
|
mov [image_of_ebx], ebx
|
|
ret
|
|
.not_impl:
|
|
call free_cd_channel
|
|
and [cd_status], 0
|
|
mov dword [image_of_eax], 2 ; not implemented
|
|
ret
|
|
|
|
fs_CdServices:
|
|
dd fs_CdRead
|
|
dd fs_CdReadFolder
|
|
dd fs_NotImplemented
|
|
dd fs_NotImplemented
|
|
dd fs_NotImplemented
|
|
dd fs_CdGetFileInfo
|
|
dd fs_NotImplemented
|
|
dd 0
|
|
dd fs_NotImplemented
|
|
dd fs_NotImplemented
|
|
fs_NumCdServices = ($ - fs_CdServices)/4
|
|
|
|
;*******************************************************
|
|
|
|
fs_HasRamdisk:
|
|
mov al, 1 ; we always have ramdisk
|
|
ret
|
|
|
|
fs_HasFloppy:
|
|
cmp byte [DRIVE_DATA], 0
|
|
setnz al
|
|
ret
|
|
|
|
fs_HasHd0:
|
|
mov al, [DRIVE_DATA+1]
|
|
and al, 11000000b
|
|
cmp al, 01000000b
|
|
setz al
|
|
ret
|
|
fs_HasHd1:
|
|
mov al, [DRIVE_DATA+1]
|
|
and al, 00110000b
|
|
cmp al, 00010000b
|
|
setz al
|
|
ret
|
|
fs_HasHd2:
|
|
mov al, [DRIVE_DATA+1]
|
|
and al, 00001100b
|
|
cmp al, 00000100b
|
|
setz al
|
|
ret
|
|
fs_HasHd3:
|
|
mov al, [DRIVE_DATA+1]
|
|
and al, 00000011b
|
|
cmp al, 00000001b
|
|
setz al
|
|
ret
|
|
|
|
;*******************************************************
|
|
fs_HasCd0:
|
|
mov al, [DRIVE_DATA+1]
|
|
and al, 11000000b
|
|
cmp al, 10000000b
|
|
setz al
|
|
ret
|
|
fs_HasCd1:
|
|
mov al, [DRIVE_DATA+1]
|
|
and al, 00110000b
|
|
cmp al, 00100000b
|
|
setz al
|
|
ret
|
|
fs_HasCd2:
|
|
mov al, [DRIVE_DATA+1]
|
|
and al, 00001100b
|
|
cmp al, 00001000b
|
|
setz al
|
|
ret
|
|
fs_HasCd3:
|
|
mov al, [DRIVE_DATA+1]
|
|
and al, 00000011b
|
|
cmp al, 00000010b
|
|
setz al
|
|
ret
|
|
;*******************************************************
|
|
|
|
; fs_NextXXX functions:
|
|
; in: eax = partition number, from which start to scan
|
|
; out: CF=1 => no more partitions
|
|
; CF=0 => eax=next partition number
|
|
|
|
fs_NextRamdisk:
|
|
; we always have /rd/1
|
|
test eax, eax
|
|
stc
|
|
jnz @f
|
|
mov al, 1
|
|
clc
|
|
@@:
|
|
ret
|
|
|
|
fs_NextFloppy:
|
|
; we have /fd/1 iff (([DRIVE_DATA] and 0xF0) != 0) and /fd/2 iff (([DRIVE_DATA] and 0x0F) != 0)
|
|
test byte [DRIVE_DATA], 0xF0
|
|
jz .no1
|
|
test eax, eax
|
|
jnz .no1
|
|
inc eax
|
|
ret ; CF cleared
|
|
.no1:
|
|
test byte [DRIVE_DATA], 0x0F
|
|
jz .no2
|
|
cmp al, 2
|
|
jae .no2
|
|
mov al, 2
|
|
clc
|
|
ret
|
|
.no2:
|
|
stc
|
|
ret
|
|
|
|
; on hdx, we have partitions from 1 to [0x40002+x]
|
|
fs_NextHd0:
|
|
push 0
|
|
jmp fs_NextHd
|
|
fs_NextHd1:
|
|
push 1
|
|
jmp fs_NextHd
|
|
fs_NextHd2:
|
|
push 2
|
|
jmp fs_NextHd
|
|
fs_NextHd3:
|
|
push 3
|
|
fs_NextHd:
|
|
pop ecx
|
|
movzx ecx, byte [DRIVE_DATA+2+ecx]
|
|
cmp eax, ecx
|
|
jae fs_NextFloppy.no2
|
|
inc eax
|
|
clc
|
|
ret
|
|
|
|
;*******************************************************
|
|
fs_NextCd:
|
|
; we always have /cdX/1
|
|
test eax, eax
|
|
stc
|
|
jnz @f
|
|
mov al, 1
|
|
clc
|
|
@@:
|
|
ret
|
|
;*******************************************************
|
|
|
|
; Additional FS handlers.
|
|
; This handler gets the control each time when fn 70 is called
|
|
; with unknown item of root subdirectory.
|
|
; in: esi -> name
|
|
; ebp = 0 or rest of name relative to esi
|
|
; out: if the handler processes path, he must not return in file_system_lfn,
|
|
; but instead pop return address and return directly to the caller
|
|
; otherwise simply return
|
|
|
|
; here we test for /bd<N>/... - BIOS disks
|
|
biosdisk_handler:
|
|
cmp [NumBiosDisks], 0
|
|
jz .ret
|
|
mov al, [esi]
|
|
or al, 20h
|
|
cmp al, 'b'
|
|
jnz .ret
|
|
mov al, [esi+1]
|
|
or al, 20h
|
|
cmp al, 'd'
|
|
jnz .ret
|
|
push esi
|
|
inc esi
|
|
inc esi
|
|
cmp byte [esi], '0'
|
|
jb .ret2
|
|
cmp byte [esi], '9'
|
|
ja .ret2
|
|
xor edx, edx
|
|
@@:
|
|
lodsb
|
|
test al, al
|
|
jz .ok
|
|
cmp al, '/'
|
|
jz .ok
|
|
sub al, '0'
|
|
cmp al, 9
|
|
ja .ret2
|
|
lea edx, [edx*5]
|
|
lea edx, [edx*2+eax]
|
|
jmp @b
|
|
.ret2:
|
|
pop esi
|
|
.ret:
|
|
ret
|
|
.ok:
|
|
cmp al, '/'
|
|
jz @f
|
|
dec esi
|
|
@@:
|
|
add dl, 80h
|
|
xor ecx, ecx
|
|
@@:
|
|
cmp dl, [BiosDisksData+ecx*4]
|
|
jz .ok2
|
|
inc ecx
|
|
cmp ecx, [NumBiosDisks]
|
|
jb @b
|
|
jmp .ret2
|
|
.ok2:
|
|
add esp, 8
|
|
test al, al
|
|
jnz @f
|
|
mov esi, fs_BdNext
|
|
jmp file_system_lfn.maindir_noesi
|
|
@@:
|
|
push ecx
|
|
push ecx
|
|
push biosdisk_cleanup
|
|
push fs_OnBd
|
|
mov edi, esp
|
|
jmp file_system_lfn.found2
|
|
|
|
fs_BdNext:
|
|
cmp eax, [BiosDiskPartitions+ecx*4]
|
|
inc eax
|
|
cmc
|
|
biosdisk_cleanup:
|
|
ret
|
|
|
|
fs_OnBd:
|
|
pop edx edx edx edx
|
|
; edx = disk number, ecx = partition number
|
|
; esi+ebp = name
|
|
call reserve_hd1
|
|
add edx, 0x80
|
|
mov [hdpos], edx
|
|
cmp ecx, [BiosDiskPartitions+(edx-0x80)*4]
|
|
jmp fs_OnHdAndBd
|
|
|
|
; This handler is called when virtual root is enumerated
|
|
; and must return all items which can be handled by this.
|
|
; It is called several times, first time with eax=0
|
|
; in: eax = 0 for first call, previously returned value for subsequent calls
|
|
; out: eax = 0 => no more items
|
|
; eax != 0 => buffer pointed to by edi contains name of item
|
|
|
|
; here we enumerate existing BIOS disks /bd<N>
|
|
biosdisk_enum_root:
|
|
cmp eax, [NumBiosDisks]
|
|
jae .end
|
|
push eax
|
|
movzx eax, byte [BiosDisksData+eax*4]
|
|
sub al, 80h
|
|
push eax
|
|
mov al, 'b'
|
|
stosb
|
|
mov al, 'd'
|
|
stosb
|
|
pop eax
|
|
cmp al, 10
|
|
jae .big
|
|
add al, '0'
|
|
stosb
|
|
mov byte [edi], 0
|
|
pop eax
|
|
inc eax
|
|
ret
|
|
.end:
|
|
xor eax, eax
|
|
ret
|
|
.big:
|
|
push ecx edx
|
|
push -'0'
|
|
mov ecx, 10
|
|
@@:
|
|
xor edx, edx
|
|
div ecx
|
|
push edx
|
|
test eax, eax
|
|
jnz @b
|
|
xchg eax, edx
|
|
@@:
|
|
pop eax
|
|
add al, '0'
|
|
stosb
|
|
jnz @b
|
|
pop edx ecx
|
|
pop eax
|
|
inc eax
|
|
ret
|
|
|
|
process_replace_file_name:
|
|
mov ebp, [full_file_name_table]
|
|
mov edi, [full_file_name_table.size]
|
|
dec edi
|
|
shl edi, 7
|
|
add edi, ebp
|
|
.loop:
|
|
cmp edi, ebp
|
|
jb .notfound
|
|
push esi edi
|
|
@@:
|
|
cmp byte [edi], 0
|
|
jz .dest_done
|
|
lodsb
|
|
test al, al
|
|
jz .cont
|
|
or al, 20h
|
|
scasb
|
|
jz @b
|
|
jmp .cont
|
|
.dest_done:
|
|
cmp byte [esi], 0
|
|
jz .found
|
|
cmp byte [esi], '/'
|
|
jnz .cont
|
|
inc esi
|
|
jmp .found
|
|
.cont:
|
|
pop edi esi
|
|
sub edi, 128
|
|
jmp .loop
|
|
.found:
|
|
pop edi eax
|
|
mov ebp, esi
|
|
cmp byte [esi], 0
|
|
lea esi, [edi+64]
|
|
jnz .ret
|
|
.notfound:
|
|
xor ebp, ebp
|
|
.ret:
|
|
ret
|
|
|
|
sys_current_directory:
|
|
; mov esi, [current_slot]
|
|
; mov esi, [esi+APPDATA.cur_dir]
|
|
; mov edx, esi
|
|
|
|
;get length string of appdata.cur_dir
|
|
mov eax, [current_slot]
|
|
mov edi, [eax+APPDATA.cur_dir]
|
|
|
|
dec ebx
|
|
jz .set
|
|
dec ebx
|
|
jz .get
|
|
ret
|
|
.get:
|
|
; sysfunction 30.2: [for app] eax=30,ebx=2,ecx->buffer,edx=len
|
|
; for our code: ebx->buffer,ecx=len
|
|
max_cur_dir equ 0x1000
|
|
|
|
mov ebx, edi
|
|
|
|
push ecx
|
|
push edi
|
|
|
|
xor eax, eax
|
|
mov ecx, max_cur_dir
|
|
|
|
repne scasb ;find zerro at and string
|
|
jnz .error ; no zero in cur_dir: internal error, should not happen
|
|
|
|
sub edi, ebx ;lenght for copy
|
|
inc edi
|
|
mov [esp+32+8], edi ;return in eax
|
|
|
|
cmp edx, edi
|
|
jbe @f
|
|
mov edx, edi
|
|
@@:
|
|
;source string
|
|
pop esi
|
|
;destination string
|
|
pop edi
|
|
cmp edx, 1
|
|
jbe .ret
|
|
|
|
mov al, '/' ;start string with '/'
|
|
stosb
|
|
mov ecx, edx
|
|
rep movsb ;copy string
|
|
.ret:
|
|
ret
|
|
|
|
.error:
|
|
add esp, 8
|
|
or dword [esp+32], -1 ;error not found zerro at string ->[eax+APPDATA.cur_dir]
|
|
ret
|
|
.set:
|
|
; sysfunction 30.1: [for app] eax=30,ebx=1,ecx->string
|
|
; for our code: ebx->string to set
|
|
; use generic resolver with APPDATA.cur_dir as destination
|
|
push max_cur_dir ;0x1000
|
|
push edi ;destination
|
|
mov ebx, ecx
|
|
call get_full_file_name
|
|
ret
|
|
|
|
; in: ebx = file name, [esp+4] = destination, [esp+8] = sizeof destination
|
|
; destroys all registers except ebp,esp
|
|
get_full_file_name:
|
|
push ebp
|
|
mov esi, [current_slot]
|
|
mov esi, [esi+APPDATA.cur_dir]
|
|
mov edx, esi
|
|
@@:
|
|
inc esi
|
|
cmp byte [esi-1], 0
|
|
jnz @b
|
|
dec esi
|
|
cmp byte [ebx], '/'
|
|
jz .set_absolute
|
|
; string gives relative path
|
|
mov edi, [esp+8] ; destination
|
|
.relative:
|
|
cmp byte [ebx], 0
|
|
jz .set_ok
|
|
cmp word [ebx], '.'
|
|
jz .set_ok
|
|
cmp word [ebx], './'
|
|
jnz @f
|
|
add ebx, 2
|
|
jmp .relative
|
|
@@:
|
|
cmp word [ebx], '..'
|
|
jnz .doset_relative
|
|
cmp byte [ebx+2], 0
|
|
jz @f
|
|
cmp byte [ebx+2], '/'
|
|
jnz .doset_relative
|
|
@@:
|
|
dec esi
|
|
cmp byte [esi], '/'
|
|
jnz @b
|
|
add ebx, 3
|
|
jmp .relative
|
|
.set_ok:
|
|
cmp edx, edi ; is destination equal to APPDATA.cur_dir?
|
|
jz .set_ok.cur_dir
|
|
sub esi, edx
|
|
cmp esi, [esp+12]
|
|
jb .set_ok.copy
|
|
.fail:
|
|
mov byte [edi], 0
|
|
xor eax, eax ; fail
|
|
pop ebp
|
|
ret 8
|
|
.set_ok.copy:
|
|
mov ecx, esi
|
|
mov esi, edx
|
|
rep movsb
|
|
mov byte [edi], 0
|
|
.ret.ok:
|
|
mov al, 1 ; ok
|
|
pop ebp
|
|
ret 8
|
|
.set_ok.cur_dir:
|
|
mov byte [esi], 0
|
|
jmp .ret.ok
|
|
.doset_relative:
|
|
cmp edx, edi
|
|
jz .doset_relative.cur_dir
|
|
sub esi, edx
|
|
cmp esi, [esp+12]
|
|
jae .fail
|
|
mov ecx, esi
|
|
mov esi, edx
|
|
mov edx, edi
|
|
rep movsb
|
|
jmp .doset_relative.copy
|
|
.doset_relative.cur_dir:
|
|
mov edi, esi
|
|
.doset_relative.copy:
|
|
add edx, [esp+12]
|
|
mov byte [edi], '/'
|
|
inc edi
|
|
cmp edi, edx
|
|
jae .overflow
|
|
@@:
|
|
mov al, [ebx]
|
|
inc ebx
|
|
stosb
|
|
test al, al
|
|
jz .ret.ok
|
|
cmp edi, edx
|
|
jb @b
|
|
.overflow:
|
|
dec edi
|
|
jmp .fail
|
|
.set_absolute:
|
|
lea esi, [ebx+1]
|
|
call process_replace_file_name
|
|
mov edi, [esp+8]
|
|
mov edx, [esp+12]
|
|
add edx, edi
|
|
.set_copy:
|
|
lodsb
|
|
stosb
|
|
test al, al
|
|
jz .set_part2
|
|
.set_copy_cont:
|
|
cmp edi, edx
|
|
jb .set_copy
|
|
jmp .overflow
|
|
.set_part2:
|
|
mov esi, ebp
|
|
xor ebp, ebp
|
|
test esi, esi
|
|
jz .ret.ok
|
|
mov byte [edi-1], '/'
|
|
jmp .set_copy_cont
|