Rev 1378 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
495 | diamond | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
465 | serge | 2 | ;; ;; |
495 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
||
5 | ;; ;; |
||
465 | serge | 6 | ;; FAT32.INC ;; |
7 | ;; ;; |
||
8 | ;; FAT16/32 functions for KolibriOS ;; |
||
9 | ;; ;; |
||
10 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
||
11 | ;; ;; |
||
12 | ;; See file COPYING for details ;; |
||
13 | ;; 04.02.2007 LFN create folder - diamond ;; |
||
14 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
||
15 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
||
16 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
||
17 | ;; 23.06.2006 LFN start application - diamond ;; |
||
18 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
||
19 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
||
20 | ;; 04.05.2006 LFN read folder - diamond ;; |
||
21 | ;; 29.04.2006 Elimination of hangup after the ;; |
||
22 | ;; expiration hd_wait_timeout - Mario79 ;; |
||
23 | ;; 23.04.2006 LFN read file - diamond ;; |
||
24 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
||
25 | ;; to MBR, see file part_set.inc - Mario79 ;; |
||
26 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
||
27 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
||
28 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
||
29 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
||
30 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
||
31 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
||
32 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
||
33 | ;; 08.11.2004 rename - ATV ;; |
||
34 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
||
35 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
||
36 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
||
37 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
||
38 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
||
39 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
||
40 | ;; 30.3.2004 Error parameters at function return - VT ;; |
||
41 | ;; 01.5.2002 Bugfix in device write - VT ;; |
||
42 | ;; 20.5.2002 Hd status check - VT ;; |
||
43 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
||
44 | ;; ;; |
||
593 | mikedld | 45 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ha | 46 | |
593 | mikedld | 47 | $Revision: 1379 $ |
48 | |||
49 | |||
1 | ha | 50 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
51 | |||
52 | mikedld | 52 | ERROR_SUCCESS = 0 |
53 | ERROR_DISK_BASE = 1 |
||
54 | ERROR_UNSUPPORTED_FS = 2 |
||
55 | ERROR_UNKNOWN_FS = 3 |
||
56 | ERROR_PARTITION = 4 |
||
57 | ERROR_FILE_NOT_FOUND = 5 |
||
58 | ERROR_END_OF_FILE = 6 |
||
59 | ERROR_MEMORY_POINTER = 7 |
||
60 | ERROR_DISK_FULL = 8 |
||
61 | ERROR_FAT_TABLE = 9 |
||
62 | ERROR_ACCESS_DENIED = 10 |
||
1 | ha | 63 | |
64 | PUSHAD_EAX equ [esp+28] |
||
65 | PUSHAD_ECX equ [esp+24] |
||
66 | PUSHAD_EDX equ [esp+20] |
||
67 | PUSHAD_EBX equ [esp+16] |
||
68 | PUSHAD_EBP equ [esp+8] |
||
69 | PUSHAD_ESI equ [esp+4] |
||
70 | PUSHAD_EDI equ [esp+0] |
||
71 | |||
171 | diamond | 72 | uglobal |
73 | align 4 |
||
1 | ha | 74 | partition_count dd 0 ; partitions found by set_FAT32_variables |
75 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
||
76 | longname_sec2 dd 0 ; directory sectors for delete long filename |
||
77 | |||
78 | hd_error dd 0 ; set by wait_for_sector_buffer |
||
79 | hd_setup dd 0 |
||
80 | hd_wait_timeout dd 0 |
||
81 | |||
82 | cluster_tmp dd 0 ; used by analyze_directory |
||
83 | ; and analyze_directory_to_write |
||
84 | |||
85 | file_size dd 0 ; used by file_read |
||
86 | |||
87 | cache_search_start dd 0 ; used by find_empty_slot |
||
171 | diamond | 88 | endg |
1 | ha | 89 | |
171 | diamond | 90 | iglobal |
1 | ha | 91 | fat_in_cache dd -1 |
171 | diamond | 92 | endg |
1 | ha | 93 | |
94 | uglobal |
||
171 | diamond | 95 | align 4 |
96 | fat_cache: times 512 db 0 |
||
1 | ha | 97 | Sector512: ; label for dev_hdcd.inc |
98 | buffer: times 512 db 0 |
||
133 | diamond | 99 | fsinfo_buffer: times 512 db 0 |
1 | ha | 100 | endg |
101 | |||
102 | uglobal |
||
103 | fat16_root db 0 ; flag for fat16 rootdir |
||
104 | fat_change db 0 ; 1=fat has changed |
||
105 | endg |
||
106 | |||
107 | reserve_hd1: |
||
108 | |||
109 | cli |
||
110 | cmp [hd1_status],0 |
||
111 | je reserve_ok1 |
||
112 | |||
113 | sti |
||
114 | call change_task |
||
115 | jmp reserve_hd1 |
||
116 | |||
117 | reserve_ok1: |
||
118 | |||
119 | push eax |
||
379 | serge | 120 | mov eax,[CURRENT_TASK] |
1 | ha | 121 | shl eax,5 |
379 | serge | 122 | mov eax,[eax+CURRENT_TASK+TASKDATA.pid] |
1 | ha | 123 | mov [hd1_status],eax |
124 | pop eax |
||
125 | sti |
||
126 | ret |
||
95 | mario79 | 127 | ;******************************************** |
321 | diamond | 128 | |
129 | uglobal |
||
130 | hd_in_cache db ? |
||
131 | endg |
||
132 | |||
95 | mario79 | 133 | reserve_hd_channel: |
709 | diamond | 134 | ; BIOS disk accesses are protected with common mutex hd1_status |
135 | ; This must be modified when hd1_status will not be valid! |
||
136 | cmp [hdpos], 0x80 |
||
137 | jae .ret |
||
95 | mario79 | 138 | cmp [hdbase], 0x1F0 |
139 | jne .IDE_Channel_2 |
||
140 | .IDE_Channel_1: |
||
141 | cli |
||
142 | cmp [IDE_Channel_1],0 |
||
143 | je .reserve_ok_1 |
||
144 | sti |
||
145 | call change_task |
||
146 | jmp .IDE_Channel_1 |
||
147 | .IDE_Channel_2: |
||
148 | cli |
||
149 | cmp [IDE_Channel_2],0 |
||
150 | je .reserve_ok_2 |
||
151 | sti |
||
152 | call change_task |
||
321 | diamond | 153 | jmp .IDE_Channel_2 |
95 | mario79 | 154 | .reserve_ok_1: |
321 | diamond | 155 | mov [IDE_Channel_1], 1 |
156 | push eax |
||
157 | mov al, 1 |
||
158 | jmp @f |
||
95 | mario79 | 159 | .reserve_ok_2: |
321 | diamond | 160 | mov [IDE_Channel_2], 1 |
161 | push eax |
||
162 | mov al, 3 |
||
163 | @@: |
||
164 | cmp [hdid], 1 |
||
165 | sbb al, -1 |
||
166 | cmp al, [hd_in_cache] |
||
167 | jz @f |
||
168 | mov [hd_in_cache], al |
||
169 | call clear_hd_cache |
||
170 | @@: |
||
171 | pop eax |
||
1379 | turbanoff | 172 | sti |
709 | diamond | 173 | .ret: |
321 | diamond | 174 | ret |
175 | |||
95 | mario79 | 176 | free_hd_channel: |
709 | diamond | 177 | ; see comment at reserve_hd_channel |
178 | cmp [hdpos], 0x80 |
||
179 | jae .ret |
||
95 | mario79 | 180 | cmp [hdbase], 0x1F0 |
181 | jne .IDE_Channel_2 |
||
182 | .IDE_Channel_1: |
||
183 | mov [IDE_Channel_1],0 |
||
709 | diamond | 184 | .ret: |
95 | mario79 | 185 | ret |
186 | .IDE_Channel_2: |
||
187 | mov [IDE_Channel_2],0 |
||
188 | ret |
||
189 | ;******************************************** |
||
379 | serge | 190 | problem_partition db 0 ; used for partitions search |
1 | ha | 191 | |
65 | mario79 | 192 | include 'part_set.inc' |
1 | ha | 193 | |
194 | set_FAT: |
||
195 | ;-------------------------------- |
||
196 | ; input : EAX = cluster |
||
197 | ; EDX = value to save |
||
198 | ; output : EDX = old value |
||
199 | ;-------------------------------- |
||
200 | push eax ebx esi |
||
201 | |||
202 | cmp eax,2 |
||
203 | jb sfc_error |
||
204 | cmp eax,[LAST_CLUSTER] |
||
205 | ja sfc_error |
||
256 | diamond | 206 | cmp [fs_type],16 |
1 | ha | 207 | je sfc_1 |
208 | add eax,eax |
||
209 | sfc_1: |
||
210 | add eax,eax |
||
211 | mov esi,511 |
||
212 | and esi,eax ; esi = position in fat sector |
||
213 | shr eax,9 ; eax = fat sector |
||
214 | add eax,[FAT_START] |
||
215 | mov ebx,fat_cache |
||
216 | |||
217 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
||
218 | je sfc_in_cache ; yes |
||
219 | |||
220 | cmp [fat_change],0 ; is fat changed? |
||
221 | je sfc_no_change ; no |
||
222 | call write_fat_sector ; yes. write it into disk |
||
74 | mario79 | 223 | cmp [hd_error],0 |
224 | jne sfc_error |
||
1 | ha | 225 | |
226 | sfc_no_change: |
||
227 | mov [fat_in_cache],eax ; save fat sector |
||
228 | call hd_read |
||
74 | mario79 | 229 | cmp [hd_error],0 |
230 | jne sfc_error |
||
1 | ha | 231 | |
379 | serge | 232 | |
1 | ha | 233 | sfc_in_cache: |
256 | diamond | 234 | cmp [fs_type],16 |
1 | ha | 235 | jne sfc_test32 |
236 | |||
237 | sfc_set16: |
||
238 | xchg [ebx+esi],dx ; save new value and get old value |
||
239 | jmp sfc_write |
||
240 | |||
241 | sfc_test32: |
||
242 | mov eax,[fatMASK] |
||
243 | |||
244 | sfc_set32: |
||
245 | and edx,eax |
||
246 | xor eax,-1 ; mask for high bits |
||
247 | and eax,[ebx+esi] ; get high 4 bits |
||
248 | or eax,edx |
||
249 | mov edx,[ebx+esi] ; get old value |
||
250 | mov [ebx+esi],eax ; save new value |
||
251 | |||
252 | sfc_write: |
||
253 | mov [fat_change],1 ; fat has changed |
||
254 | |||
255 | sfc_nonzero: |
||
256 | and edx,[fatMASK] |
||
257 | |||
258 | sfc_error: |
||
259 | pop esi ebx eax |
||
260 | ret |
||
261 | |||
262 | |||
263 | get_FAT: |
||
264 | ;-------------------------------- |
||
265 | ; input : EAX = cluster |
||
266 | ; output : EAX = next cluster |
||
267 | ;-------------------------------- |
||
268 | push ebx esi |
||
269 | |||
256 | diamond | 270 | cmp [fs_type],16 |
1 | ha | 271 | je gfc_1 |
272 | add eax,eax |
||
273 | gfc_1: |
||
274 | add eax,eax |
||
275 | mov esi,511 |
||
276 | and esi,eax ; esi = position in fat sector |
||
277 | shr eax,9 ; eax = fat sector |
||
278 | add eax,[FAT_START] |
||
279 | mov ebx,fat_cache |
||
280 | |||
281 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
||
282 | je gfc_in_cache |
||
283 | |||
284 | cmp [fat_change],0 ; is fat changed? |
||
285 | je gfc_no_change ; no |
||
286 | call write_fat_sector ; yes. write it into disk |
||
74 | mario79 | 287 | cmp [hd_error],0 |
288 | jne hd_error_01 |
||
1 | ha | 289 | |
290 | gfc_no_change: |
||
291 | mov [fat_in_cache],eax |
||
292 | call hd_read |
||
74 | mario79 | 293 | cmp [hd_error],0 |
294 | jne hd_error_01 |
||
1 | ha | 295 | |
296 | gfc_in_cache: |
||
297 | mov eax,[ebx+esi] |
||
298 | and eax,[fatMASK] |
||
74 | mario79 | 299 | hd_error_01: |
1 | ha | 300 | pop esi ebx |
301 | ret |
||
302 | |||
303 | |||
304 | get_free_FAT: |
||
305 | ;----------------------------------------------------------- |
||
306 | ; output : if CARRY=0 EAX = # first cluster found free |
||
307 | ; if CARRY=1 disk full |
||
308 | ; Note : for more speed need to use fat_cache directly |
||
309 | ;----------------------------------------------------------- |
||
310 | push ecx |
||
311 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
||
312 | sub ecx,2 |
||
649 | diamond | 313 | mov eax,[fatStartScan] |
314 | cmp eax,2 |
||
315 | jb gff_reset |
||
1 | ha | 316 | |
317 | gff_test: |
||
318 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
||
319 | jbe gff_in_range |
||
649 | diamond | 320 | gff_reset: |
1 | ha | 321 | mov eax,2 |
322 | |||
323 | gff_in_range: |
||
324 | push eax |
||
325 | call get_FAT ; get cluster state |
||
74 | mario79 | 326 | cmp [hd_error],0 |
327 | jne gff_not_found_1 |
||
328 | |||
1 | ha | 329 | test eax,eax ; is it free? |
330 | pop eax |
||
331 | je gff_found ; yes |
||
332 | inc eax ; next cluster |
||
333 | dec ecx ; is all checked? |
||
334 | jns gff_test ; no |
||
335 | |||
74 | mario79 | 336 | gff_not_found_1: |
337 | add esp,4 |
||
1 | ha | 338 | gff_not_found: |
339 | pop ecx ; yes. disk is full |
||
340 | stc |
||
341 | ret |
||
342 | |||
343 | gff_found: |
||
649 | diamond | 344 | lea ecx,[eax+1] |
345 | mov [fatStartScan],ecx |
||
1 | ha | 346 | pop ecx |
347 | clc |
||
348 | ret |
||
349 | |||
350 | |||
351 | write_fat_sector: |
||
352 | ;----------------------------------------------------------- |
||
353 | ; write changed fat to disk |
||
354 | ;----------------------------------------------------------- |
||
355 | push eax ebx ecx |
||
356 | |||
357 | mov [fat_change],0 |
||
358 | mov eax,[fat_in_cache] |
||
359 | cmp eax,-1 |
||
360 | jz write_fat_not_used |
||
361 | mov ebx,fat_cache |
||
362 | mov ecx,[NUMBER_OF_FATS] |
||
363 | |||
364 | write_next_fat: |
||
365 | call hd_write |
||
74 | mario79 | 366 | cmp [hd_error],0 |
367 | jne write_fat_not_used |
||
368 | |||
1 | ha | 369 | add eax,[SECTORS_PER_FAT] |
370 | dec ecx |
||
371 | jnz write_next_fat |
||
372 | |||
373 | write_fat_not_used: |
||
374 | pop ecx ebx eax |
||
375 | ret |
||
376 | |||
377 | |||
378 | analyze_directory: |
||
379 | ;----------------------------------------------------------- |
||
380 | ; input : EAX = first cluster of the directory |
||
381 | ; EBX = pointer to filename |
||
382 | ; output : IF CARRY=0 EAX = sector where th file is found |
||
383 | ; EBX = pointer in buffer |
||
384 | ; [buffer .. buffer+511] |
||
385 | ; ECX,EDX,ESI,EDI not changed |
||
386 | ; IF CARRY=1 filename not found |
||
387 | ; Note : if cluster=0 it's changed to read rootdir |
||
388 | ; save 2 previous directory sectors in longname_sec |
||
389 | ;----------------------------------------------------------- |
||
390 | push ecx edx esi edi ebx ; ebx = [esp+0] |
||
391 | mov [longname_sec1],0 |
||
392 | mov [longname_sec2],0 |
||
393 | |||
394 | adr_new_cluster: |
||
395 | mov [cluster_tmp],eax |
||
396 | mov [fat16_root],0 |
||
397 | cmp eax,[LAST_CLUSTER] |
||
398 | ja adr_not_found ; too big cluster number, something is wrong |
||
399 | cmp eax,2 |
||
400 | jnb adr_data_cluster |
||
401 | |||
402 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
256 | diamond | 403 | cmp [fs_type],16 |
1 | ha | 404 | jne adr_data_cluster |
405 | mov eax,[ROOT_START] |
||
406 | mov edx,[ROOT_SECTORS] |
||
407 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
408 | jmp adr_new_sector |
||
409 | |||
410 | adr_data_cluster: |
||
411 | sub eax,2 |
||
412 | mov edx,[SECTORS_PER_CLUSTER] |
||
413 | imul eax,edx |
||
414 | add eax,[DATA_START] |
||
415 | |||
416 | adr_new_sector: |
||
417 | mov ebx,buffer |
||
418 | call hd_read |
||
74 | mario79 | 419 | cmp [hd_error],0 |
420 | jne adr_not_found |
||
421 | |||
1 | ha | 422 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
423 | |||
424 | adr_analyze: |
||
425 | mov edi,[ebx+11] ; file attribute |
||
426 | and edi,0xf |
||
427 | cmp edi,0xf |
||
428 | je adr_long_filename |
||
429 | test edi,0x8 ; skip over volume label |
||
430 | jne adr_long_filename ; Note: label can be same name as file/dir |
||
431 | |||
432 | mov esi,[esp+0] ; filename need to be uppercase |
||
433 | mov edi,ebx |
||
434 | push ecx |
||
435 | mov ecx,11 |
||
436 | cld |
||
437 | rep cmpsb ; compare 8+3 filename |
||
438 | pop ecx |
||
439 | je adr_found |
||
440 | |||
441 | adr_long_filename: |
||
442 | add ebx,32 ; position of next dir entry |
||
443 | dec ecx |
||
444 | jnz adr_analyze |
||
445 | |||
446 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
||
447 | mov [longname_sec1],eax ; for delete long filename |
||
448 | mov [longname_sec2],ecx |
||
449 | inc eax ; next sector |
||
450 | dec edx |
||
451 | jne adr_new_sector |
||
452 | cmp [fat16_root],1 ; end of fat16 rootdir |
||
453 | je adr_not_found |
||
454 | |||
455 | adr_next_cluster: |
||
456 | mov eax,[cluster_tmp] |
||
457 | call get_FAT ; get next cluster |
||
74 | mario79 | 458 | cmp [hd_error],0 |
459 | jne adr_not_found |
||
460 | |||
1 | ha | 461 | cmp eax,2 ; incorrect fat chain? |
462 | jb adr_not_found ; yes |
||
463 | cmp eax,[fatRESERVED] ; is it end of directory? |
||
464 | jb adr_new_cluster ; no. analyse it |
||
465 | |||
466 | adr_not_found: |
||
467 | pop edi edi esi edx ecx ; first edi will remove ebx |
||
468 | stc ; file not found |
||
469 | ret |
||
470 | |||
471 | adr_found: |
||
472 | pop edi edi esi edx ecx ; first edi will remove ebx |
||
473 | clc ; file found |
||
474 | ret |
||
475 | |||
476 | |||
477 | get_data_cluster: |
||
478 | ;----------------------------------------------------------- |
||
479 | ; input : EAX = cluster |
||
480 | ; EBX = pointer to buffer |
||
481 | ; EDX = # blocks to read in buffer |
||
482 | ; ESI = # blocks to skip over |
||
483 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
||
484 | ; if CARRY=1 cluster out of range |
||
485 | ; Note : if cluster=0 it's changed to read rootdir |
||
486 | ;----------------------------------------------------------- |
||
487 | push eax ecx |
||
488 | |||
489 | mov [fat16_root],0 |
||
490 | cmp eax,[LAST_CLUSTER] |
||
491 | ja gdc_error ; too big cluster number, something is wrong |
||
492 | cmp eax,2 |
||
493 | jnb gdc_cluster |
||
494 | |||
495 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
||
256 | diamond | 496 | cmp [fs_type],16 |
1 | ha | 497 | jne gdc_cluster |
498 | mov eax,[ROOT_START] |
||
499 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
||
500 | mov [fat16_root],1 ; flag for fat16 rootdir |
||
501 | jmp gdc_read |
||
502 | |||
503 | gdc_cluster: |
||
504 | sub eax,2 |
||
505 | mov ecx,[SECTORS_PER_CLUSTER] |
||
506 | imul eax,ecx |
||
507 | add eax,[DATA_START] |
||
508 | |||
509 | gdc_read: |
||
510 | test esi,esi ; first wanted block |
||
511 | je gdcl1 ; yes, skip count is 0 |
||
512 | dec esi |
||
513 | jmp gdcl2 |
||
514 | |||
515 | gdcl1: |
||
516 | call hd_read |
||
74 | mario79 | 517 | cmp [hd_error],0 |
379 | serge | 518 | jne gdc_error |
74 | mario79 | 519 | |
1 | ha | 520 | add ebx,512 ; update pointer |
521 | dec edx |
||
522 | |||
523 | gdcl2: |
||
524 | test edx,edx ; is all read? |
||
525 | je out_of_read |
||
526 | |||
527 | inc eax ; next sector |
||
528 | dec ecx |
||
529 | jnz gdc_read |
||
530 | |||
531 | out_of_read: |
||
532 | pop ecx eax |
||
533 | clc |
||
534 | ret |
||
535 | |||
536 | gdc_error: |
||
537 | pop ecx eax |
||
538 | stc |
||
539 | ret |
||
540 | |||
541 | |||
542 | get_cluster_of_a_path: |
||
543 | ;--------------------------------------------------------- |
||
544 | ; input : EBX = pointer to a path string |
||
545 | ; (example: the path "/files/data/document" become |
||
546 | ; "files......data.......document...0" |
||
547 | ; '.' = space char |
||
548 | ; '0' = char(0) (ASCII=0) !!! ) |
||
549 | ; output : if (CARRY=1) -> ERROR in the PATH |
||
550 | ; if (CARRY=0) -> EAX=cluster |
||
551 | ;--------------------------------------------------------- |
||
552 | push ebx edx |
||
553 | |||
554 | mov eax,[ROOT_CLUSTER] |
||
555 | mov edx,ebx |
||
556 | |||
557 | search_end_of_path: |
||
558 | cmp byte [edx],0 |
||
559 | je found_end_of_path |
||
560 | |||
561 | inc edx ; '/' |
||
562 | mov ebx,edx |
||
563 | call analyze_directory |
||
564 | jc directory_not_found |
||
565 | |||
566 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
||
567 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
||
568 | and eax,[fatMASK] |
||
569 | add edx,11 ; 8+3 (name+extension) |
||
570 | jmp search_end_of_path |
||
571 | |||
572 | found_end_of_path: |
||
573 | pop edx ebx |
||
574 | clc ; no errors |
||
575 | ret |
||
576 | |||
577 | directory_not_found: |
||
578 | pop edx ebx |
||
579 | stc ; errors occour |
||
580 | ret |
||
581 | |||
582 | |||
583 | bcd2bin: |
||
584 | ;---------------------------------- |
||
585 | ; input : AL=BCD number (eg. 0x11) |
||
586 | ; output : AH=0 |
||
587 | ; AL=decimal number (eg. 11) |
||
588 | ;---------------------------------- |
||
589 | xor ah,ah |
||
590 | shl ax,4 |
||
591 | shr al,4 |
||
592 | aad |
||
593 | ret |
||
594 | |||
595 | |||
596 | get_date_for_file: |
||
597 | ;----------------------------------------------------- |
||
598 | ; Get date from CMOS and pack day,month,year in AX |
||
599 | ; DATE bits 0..4 : day of month 0..31 |
||
600 | ; 5..8 : month of year 1..12 |
||
601 | ; 9..15 : count of years from 1980 |
||
602 | ;----------------------------------------------------- |
||
603 | mov al,0x7 ;day |
||
604 | out 0x70,al |
||
605 | in al,0x71 |
||
606 | call bcd2bin |
||
607 | ror eax,5 |
||
608 | |||
609 | mov al,0x8 ;month |
||
610 | out 0x70,al |
||
611 | in al,0x71 |
||
612 | call bcd2bin |
||
613 | ror eax,4 |
||
614 | |||
615 | mov al,0x9 ;year |
||
616 | out 0x70,al |
||
617 | in al,0x71 |
||
618 | call bcd2bin |
||
619 | add ax,20 ;because CMOS return only the two last |
||
620 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
||
621 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
||
622 | ret |
||
623 | |||
624 | |||
625 | get_time_for_file: |
||
626 | ;----------------------------------------------------- |
||
627 | ; Get time from CMOS and pack hour,minute,second in AX |
||
628 | ; TIME bits 0..4 : second (the low bit is lost) |
||
629 | ; 5..10 : minute 0..59 |
||
630 | ; 11..15 : hour 0..23 |
||
631 | ;----------------------------------------------------- |
||
632 | mov al,0x0 ;second |
||
633 | out 0x70,al |
||
634 | in al,0x71 |
||
635 | call bcd2bin |
||
636 | ror eax,6 |
||
637 | |||
638 | mov al,0x2 ;minute |
||
639 | out 0x70,al |
||
640 | in al,0x71 |
||
641 | call bcd2bin |
||
642 | ror eax,6 |
||
643 | |||
644 | mov al,0x4 ;hour |
||
645 | out 0x70,al |
||
646 | in al,0x71 |
||
647 | call bcd2bin |
||
648 | rol eax,11 |
||
649 | ret |
||
650 | |||
651 | |||
652 | set_current_time_for_entry: |
||
653 | ;----------------------------------------------------- |
||
654 | ; Set current time/date for file entry |
||
655 | ; input : ebx = file entry pointer |
||
656 | ;----------------------------------------------------- |
||
657 | push eax |
||
658 | call get_time_for_file ; update files date/time |
||
659 | mov [ebx+22],ax |
||
660 | call get_date_for_file |
||
661 | mov [ebx+24],ax |
||
662 | pop eax |
||
663 | ret |
||
664 | |||
665 | |||
666 | |||
667 | add_disk_free_space: |
||
668 | ;----------------------------------------------------- |
||
669 | ; input : ecx = cluster count |
||
670 | ; Note : negative = remove clusters from free space |
||
671 | ; positive = add clusters to free space |
||
672 | ;----------------------------------------------------- |
||
673 | test ecx,ecx ; no change |
||
674 | je add_dfs_no |
||
256 | diamond | 675 | cmp [fs_type],32 ; free disk space only used by fat32 |
1 | ha | 676 | jne add_dfs_no |
677 | |||
678 | push eax ebx |
||
679 | mov eax,[ADR_FSINFO] |
||
133 | diamond | 680 | mov ebx,fsinfo_buffer |
1 | ha | 681 | call hd_read |
74 | mario79 | 682 | cmp [hd_error],0 |
683 | jne add_not_fs |
||
684 | |||
1 | ha | 685 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
686 | jne add_not_fs |
||
687 | |||
688 | add [ebx+0x1e8],ecx |
||
654 | diamond | 689 | push [fatStartScan] |
690 | pop dword [ebx+0x1ec] |
||
1 | ha | 691 | call hd_write |
133 | diamond | 692 | ; cmp [hd_error],0 |
693 | ; jne add_not_fs |
||
1 | ha | 694 | |
695 | add_not_fs: |
||
696 | pop ebx eax |
||
697 | |||
698 | add_dfs_no: |
||
699 | ret |
||
700 | |||
701 | |||
702 | file_read: |
||
703 | ;-------------------------------------------------------------------------- |
||
704 | ; INPUT : user-register register-in-this meaning symbol-in-this |
||
705 | ; |
||
706 | ; EAX EDI system call to write / |
||
707 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
||
708 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
||
709 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
||
710 | ; ESI EDX (PAR3) pointer to path PAR3 |
||
711 | ; EDI ESI vt first 512 block to read |
||
712 | ; EDI if 0 - read root |
||
713 | ; |
||
714 | ; output : eax = 0 - ok |
||
715 | ; 3 - unknown FS |
||
716 | ; 5 - file not found |
||
717 | ; 6 - end of file |
||
718 | ; 9 - fat table corrupted |
||
74 | mario79 | 719 | ; 10 - access denied |
1 | ha | 720 | ; ebx = size of file/directory |
721 | ;-------------------------------------------------------------------------- |
||
256 | diamond | 722 | cmp [fs_type], 16 |
723 | jz fat_ok_for_reading |
||
724 | cmp [fs_type], 32 |
||
725 | jz fat_ok_for_reading |
||
1 | ha | 726 | xor ebx,ebx |
727 | mov eax,ERROR_UNKNOWN_FS |
||
63 | halyavin | 728 | mov [hd1_status], ebx |
1 | ha | 729 | ret |
730 | |||
731 | fat_ok_for_reading: |
||
732 | ; call reserve_hd1 |
||
733 | |||
734 | pushad |
||
735 | |||
736 | mov ebx,edx |
||
737 | call get_cluster_of_a_path |
||
738 | jc file_to_read_not_found |
||
739 | |||
740 | test edi,edi ; read rootdir |
||
741 | jne no_read_root |
||
742 | |||
743 | xor eax,eax |
||
744 | call get_dir_size ; return rootdir size |
||
74 | mario79 | 745 | cmp [hd_error],0 |
746 | jne file_access_denied |
||
747 | |||
1 | ha | 748 | mov [file_size],eax |
749 | mov eax,[ROOT_CLUSTER] |
||
750 | jmp file_read_start |
||
751 | |||
752 | no_read_root: |
||
753 | mov ebx,PUSHAD_EAX ; file name |
||
754 | call analyze_directory |
||
755 | jc file_to_read_not_found |
||
756 | |||
757 | mov eax,[ebx+28] ; file size |
||
758 | test byte [ebx+11],0x10 ; is it directory? |
||
759 | jz read_set_size ; no |
||
760 | |||
761 | mov eax,[ebx+20-2] ; FAT entry |
||
762 | mov ax,[ebx+26] |
||
763 | and eax,[fatMASK] |
||
764 | call get_dir_size |
||
74 | mario79 | 765 | cmp [hd_error],0 |
766 | jne file_access_denied |
||
1 | ha | 767 | |
768 | read_set_size: |
||
769 | mov [file_size],eax |
||
770 | |||
771 | mov eax,[ebx+20-2] ; FAT entry |
||
772 | mov ax,[ebx+26] |
||
773 | and eax,[fatMASK] |
||
774 | |||
775 | file_read_start: |
||
776 | mov ebx,PUSHAD_ECX ; pointer to buffer |
||
777 | mov edx,PUSHAD_EBX ; file blocks to read |
||
778 | mov esi,PUSHAD_ESI ; first 512 block to read |
||
779 | |||
780 | file_read_new_cluster: |
||
781 | call get_data_cluster |
||
782 | jc file_read_eof ; end of file or cluster out of range |
||
783 | |||
784 | test edx,edx ; is all read? |
||
785 | je file_read_OK ; yes |
||
786 | |||
787 | call get_FAT ; get next cluster |
||
74 | mario79 | 788 | cmp [hd_error],0 |
789 | jne file_access_denied |
||
790 | |||
1 | ha | 791 | cmp eax,[fatRESERVED] ; end of file |
792 | jnb file_read_eof |
||
793 | cmp eax,2 ; incorrect fat chain |
||
794 | jnb file_read_new_cluster |
||
795 | |||
796 | popad |
||
797 | mov [hd1_status],0 |
||
798 | mov ebx,[file_size] |
||
799 | mov eax,ERROR_FAT_TABLE |
||
800 | ret |
||
801 | |||
802 | file_read_eof: |
||
74 | mario79 | 803 | cmp [hd_error],0 |
804 | jne file_access_denied |
||
1 | ha | 805 | popad |
806 | mov [hd1_status],0 |
||
807 | mov ebx,[file_size] |
||
808 | mov eax,ERROR_END_OF_FILE |
||
809 | ret |
||
810 | |||
811 | file_read_OK: |
||
812 | popad |
||
813 | mov [hd1_status],0 |
||
814 | mov ebx,[file_size] |
||
815 | xor eax,eax |
||
816 | ret |
||
817 | |||
818 | file_to_read_not_found: |
||
74 | mario79 | 819 | cmp [hd_error],0 |
820 | jne file_access_denied |
||
1 | ha | 821 | popad |
822 | mov [hd1_status],0 |
||
823 | xor ebx,ebx |
||
824 | mov eax,ERROR_FILE_NOT_FOUND |
||
825 | ret |
||
826 | |||
74 | mario79 | 827 | file_access_denied: |
828 | popad |
||
829 | mov [hd1_status],0 |
||
830 | xor ebx,ebx |
||
831 | mov eax,ERROR_ACCESS_DENIED |
||
832 | ret |
||
1 | ha | 833 | |
834 | get_dir_size: |
||
835 | ;----------------------------------------------------- |
||
836 | ; input : eax = first cluster (0=rootdir) |
||
837 | ; output : eax = directory size in bytes |
||
838 | ;----------------------------------------------------- |
||
839 | push edx |
||
840 | xor edx,edx ; count of directory clusters |
||
841 | test eax,eax |
||
842 | jnz dir_size_next |
||
843 | |||
844 | mov eax,[ROOT_SECTORS] |
||
845 | shl eax,9 ; fat16 rootdir size in bytes |
||
256 | diamond | 846 | cmp [fs_type],16 |
1 | ha | 847 | je dir_size_ret |
848 | mov eax,[ROOT_CLUSTER] |
||
849 | |||
850 | dir_size_next: |
||
851 | cmp eax,2 ; incorrect fat chain |
||
852 | jb dir_size_end |
||
853 | cmp eax,[fatRESERVED] ; end of directory |
||
854 | ja dir_size_end |
||
855 | call get_FAT ; get next cluster |
||
74 | mario79 | 856 | cmp [hd_error],0 |
857 | jne dir_size_ret |
||
858 | |||
1 | ha | 859 | inc edx |
860 | jmp dir_size_next |
||
861 | |||
862 | dir_size_end: |
||
863 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
864 | imul eax,edx |
||
865 | |||
866 | dir_size_ret: |
||
867 | pop edx |
||
868 | ret |
||
869 | |||
870 | |||
871 | clear_cluster_chain: |
||
872 | ;----------------------------------------------------- |
||
873 | ; input : eax = first cluster |
||
874 | ;----------------------------------------------------- |
||
875 | push eax ecx edx |
||
876 | xor ecx,ecx ; cluster count |
||
877 | |||
878 | clean_new_chain: |
||
879 | cmp eax,[LAST_CLUSTER] ; end of file |
||
880 | ja delete_OK |
||
881 | cmp eax,2 ; unfinished fat chain or zero length file |
||
882 | jb delete_OK |
||
883 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
||
884 | jz delete_OK |
||
885 | |||
886 | xor edx,edx |
||
887 | call set_FAT ; clear fat entry |
||
74 | mario79 | 888 | cmp [hd_error],0 |
889 | jne access_denied_01 |
||
890 | |||
1 | ha | 891 | inc ecx ; update cluster count |
892 | mov eax,edx ; old cluster |
||
893 | jmp clean_new_chain |
||
894 | |||
895 | delete_OK: |
||
896 | call add_disk_free_space ; add clusters to free disk space |
||
74 | mario79 | 897 | access_denied_01: |
1 | ha | 898 | pop edx ecx eax |
899 | ret |
||
900 | |||
901 | |||
902 | get_hd_info: |
||
903 | ;----------------------------------------------------------- |
||
904 | ; output : eax = 0 - ok |
||
905 | ; 3 - unknown FS |
||
74 | mario79 | 906 | ; 10 - access denied |
1 | ha | 907 | ; edx = cluster size in bytes |
908 | ; ebx = total clusters on disk |
||
909 | ; ecx = free clusters on disk |
||
910 | ;----------------------------------------------------------- |
||
256 | diamond | 911 | cmp [fs_type], 16 |
912 | jz info_fat_ok |
||
913 | cmp [fs_type], 32 |
||
914 | jz info_fat_ok |
||
1 | ha | 915 | xor edx,edx |
916 | xor ebx,ebx |
||
917 | xor ecx,ecx |
||
918 | mov eax,ERROR_UNKNOWN_FS |
||
919 | ret |
||
920 | |||
921 | info_fat_ok: |
||
922 | ; call reserve_hd1 |
||
923 | |||
924 | xor ecx,ecx ; count of free clusters |
||
925 | mov eax,2 |
||
926 | mov ebx,[LAST_CLUSTER] |
||
927 | |||
928 | info_cluster: |
||
929 | push eax |
||
930 | call get_FAT ; get cluster info |
||
74 | mario79 | 931 | cmp [hd_error],0 |
932 | jne info_access_denied |
||
933 | |||
1 | ha | 934 | test eax,eax ; is it free? |
935 | jnz info_used ; no |
||
936 | inc ecx |
||
937 | |||
938 | info_used: |
||
939 | pop eax |
||
940 | inc eax |
||
941 | cmp eax,ebx ; is above last cluster? |
||
942 | jbe info_cluster ; no. test next cluster |
||
943 | |||
944 | dec ebx ; cluster count |
||
945 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
||
946 | mov [hd1_status],0 |
||
947 | xor eax,eax |
||
948 | ret |
||
949 | |||
74 | mario79 | 950 | info_access_denied: |
379 | serge | 951 | add esp,4 |
74 | mario79 | 952 | xor edx,edx |
953 | xor ebx,ebx |
||
954 | xor ecx,ecx |
||
955 | mov eax,ERROR_ACCESS_DENIED |
||
956 | ret |
||
1 | ha | 957 | |
958 | update_disk: |
||
959 | ;----------------------------------------------------------- |
||
960 | ; write changed fat and cache to disk |
||
961 | ;----------------------------------------------------------- |
||
962 | cmp [fat_change],0 ; is fat changed? |
||
963 | je upd_no_change |
||
964 | |||
965 | call write_fat_sector |
||
74 | mario79 | 966 | cmp [hd_error],0 |
967 | jne update_disk_acces_denied |
||
1 | ha | 968 | |
969 | upd_no_change: |
||
970 | |||
971 | call write_cache |
||
74 | mario79 | 972 | update_disk_acces_denied: |
1 | ha | 973 | ret |
974 | |||
975 | |||
71 | diamond | 976 | ; \begin{diamond} |
977 | hd_find_lfn: |
||
521 | diamond | 978 | ; in: esi+ebp -> name |
71 | diamond | 979 | ; out: CF=1 - file not found |
86 | diamond | 980 | ; else CF=0 and edi->direntry, eax=sector |
83 | diamond | 981 | ; destroys eax |
982 | push esi edi |
||
983 | push 0 |
||
984 | push 0 |
||
985 | push fat16_root_first |
||
986 | push fat16_root_next |
||
987 | mov eax, [ROOT_CLUSTER] |
||
256 | diamond | 988 | cmp [fs_type], 32 |
83 | diamond | 989 | jz .fat32 |
990 | .loop: |
||
991 | call fat_find_lfn |
||
992 | jc .notfound |
||
993 | cmp byte [esi], 0 |
||
994 | jz .found |
||
521 | diamond | 995 | .continue: |
83 | diamond | 996 | test byte [edi+11], 10h |
997 | jz .notfound |
||
998 | and dword [esp+12], 0 |
||
88 | diamond | 999 | mov eax, [edi+20-2] |
1000 | mov ax, [edi+26] ; cluster |
||
83 | diamond | 1001 | .fat32: |
1002 | mov [esp+8], eax |
||
1003 | mov dword [esp+4], fat_notroot_first |
||
1004 | mov dword [esp], fat_notroot_next |
||
1005 | jmp .loop |
||
71 | diamond | 1006 | .notfound: |
83 | diamond | 1007 | add esp, 16 |
1008 | pop edi esi |
||
1009 | stc |
||
1010 | ret |
||
71 | diamond | 1011 | .found: |
521 | diamond | 1012 | test ebp, ebp |
1013 | jz @f |
||
1014 | mov esi, ebp |
||
1015 | xor ebp, ebp |
||
1016 | jmp .continue |
||
1017 | @@: |
||
86 | diamond | 1018 | lea eax, [esp+8] |
1019 | cmp dword [eax], 0 |
||
1020 | jz .root |
||
1021 | call fat_get_sector |
||
1022 | jmp .cmn |
||
1023 | .root: |
||
1024 | mov eax, [eax+4] |
||
1025 | add eax, [ROOT_START] |
||
1026 | .cmn: |
||
83 | diamond | 1027 | add esp, 20 ; CF=0 |
1028 | pop esi |
||
1029 | ret |
||
74 | mario79 | 1030 | |
71 | diamond | 1031 | ;---------------------------------------------------------------- |
1032 | ; |
||
1033 | ; fs_HdRead - LFN variant for reading hard disk |
||
1034 | ; |
||
1035 | ; esi points to filename |
||
1036 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
1037 | ; may be ebx=0 - start from first byte |
||
1038 | ; ecx number of bytes to read, 0+ |
||
1039 | ; edx mem location to return data |
||
1040 | ; |
||
77 | diamond | 1041 | ; ret ebx = bytes read or 0xffffffff file not found |
71 | diamond | 1042 | ; eax = 0 ok read or other = errormsg |
1043 | ; |
||
1044 | ;-------------------------------------------------------------- |
||
1045 | fs_HdRead: |
||
256 | diamond | 1046 | cmp [fs_type], 16 |
1047 | jz @f |
||
1048 | cmp [fs_type], 32 |
||
1049 | jz @f |
||
1050 | cmp [fs_type], 1 |
||
1051 | jz ntfs_HdRead |
||
1378 | turbanoff | 1052 | cmp [fs_type], 2 |
1053 | jz ext2_HdRead |
||
256 | diamond | 1054 | or ebx, -1 |
1055 | mov eax, ERROR_UNKNOWN_FS |
||
1056 | ret |
||
71 | diamond | 1057 | @@: |
74 | mario79 | 1058 | push edi |
1059 | cmp byte [esi], 0 |
||
1060 | jnz @f |
||
71 | diamond | 1061 | .noaccess: |
74 | mario79 | 1062 | pop edi |
1063 | .noaccess_2: |
||
1064 | or ebx, -1 |
||
1065 | mov eax, ERROR_ACCESS_DENIED |
||
1066 | ret |
||
379 | serge | 1067 | |
71 | diamond | 1068 | @@: |
74 | mario79 | 1069 | call hd_find_lfn |
1070 | jnc .found |
||
1071 | pop edi |
||
1072 | cmp [hd_error],0 |
||
1073 | jne .noaccess_2 |
||
1074 | or ebx, -1 |
||
1075 | mov eax, ERROR_FILE_NOT_FOUND |
||
1076 | ret |
||
1077 | |||
71 | diamond | 1078 | .found: |
74 | mario79 | 1079 | test byte [edi+11], 0x10 ; do not allow read directories |
1080 | jnz .noaccess |
||
1081 | test ebx, ebx |
||
1082 | jz .l1 |
||
1083 | cmp dword [ebx+4], 0 |
||
1084 | jz @f |
||
77 | diamond | 1085 | xor ebx, ebx |
71 | diamond | 1086 | .reteof: |
74 | mario79 | 1087 | mov eax, 6 |
1088 | pop edi |
||
1089 | ret |
||
71 | diamond | 1090 | @@: |
74 | mario79 | 1091 | mov ebx, [ebx] |
71 | diamond | 1092 | .l1: |
77 | diamond | 1093 | push ecx edx |
1094 | push 0 |
||
1095 | mov eax, [edi+28] |
||
1096 | sub eax, ebx |
||
1097 | jb .eof |
||
1098 | cmp eax, ecx |
||
1099 | jae @f |
||
1100 | mov ecx, eax |
||
1101 | mov byte [esp], 6 |
||
1102 | @@: |
||
74 | mario79 | 1103 | mov eax, [edi+20-2] |
1104 | mov ax, [edi+26] |
||
71 | diamond | 1105 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1106 | .new_cluster: |
||
74 | mario79 | 1107 | jecxz .new_sector |
1108 | test eax, eax |
||
1109 | jz .eof |
||
1110 | cmp eax, [fatRESERVED] |
||
1111 | jae .eof |
||
1112 | mov [cluster_tmp], eax |
||
1113 | dec eax |
||
1114 | dec eax |
||
1115 | mov edi, [SECTORS_PER_CLUSTER] |
||
1116 | imul eax, edi |
||
1117 | add eax, [DATA_START] |
||
71 | diamond | 1118 | .new_sector: |
74 | mario79 | 1119 | test ecx, ecx |
1120 | jz .done |
||
1121 | sub ebx, 512 |
||
1122 | jae .skip |
||
1123 | add ebx, 512 |
||
1124 | jnz .force_buf |
||
1125 | cmp ecx, 512 |
||
1126 | jb .force_buf |
||
71 | diamond | 1127 | ; we may read directly to given buffer |
74 | mario79 | 1128 | push ebx |
1129 | mov ebx, edx |
||
1130 | call hd_read |
||
1124 | diamond | 1131 | pop ebx |
74 | mario79 | 1132 | cmp [hd_error],0 |
379 | serge | 1133 | jne .noaccess_1 |
74 | mario79 | 1134 | add edx, 512 |
1135 | sub ecx, 512 |
||
1136 | jmp .skip |
||
71 | diamond | 1137 | .force_buf: |
1138 | ; we must read sector to temporary buffer and then copy it to destination |
||
74 | mario79 | 1139 | push eax ebx |
1140 | mov ebx, buffer |
||
1141 | call hd_read |
||
1124 | diamond | 1142 | mov eax, ebx |
1143 | pop ebx |
||
74 | mario79 | 1144 | cmp [hd_error],0 |
1145 | jne .noaccess_3 |
||
1146 | add eax, ebx |
||
1147 | push ecx |
||
1148 | add ecx, ebx |
||
1149 | cmp ecx, 512 |
||
1150 | jbe @f |
||
1151 | mov ecx, 512 |
||
71 | diamond | 1152 | @@: |
74 | mario79 | 1153 | sub ecx, ebx |
1154 | mov ebx, edx |
||
1155 | call memmove |
||
1156 | add edx, ecx |
||
1157 | sub [esp], ecx |
||
1158 | pop ecx |
||
1159 | pop eax |
||
1160 | xor ebx, ebx |
||
71 | diamond | 1161 | .skip: |
74 | mario79 | 1162 | inc eax |
1163 | dec edi |
||
1164 | jnz .new_sector |
||
1165 | mov eax, [cluster_tmp] |
||
1166 | call get_FAT |
||
1167 | cmp [hd_error],0 |
||
1124 | diamond | 1168 | jne .noaccess_1 |
74 | mario79 | 1169 | |
1170 | jmp .new_cluster |
||
1124 | diamond | 1171 | .noaccess_3: |
1172 | pop eax |
||
1173 | .noaccess_1: |
||
1174 | pop eax |
||
1175 | push 11 |
||
71 | diamond | 1176 | .done: |
77 | diamond | 1177 | mov ebx, edx |
1178 | pop eax edx ecx edi |
||
1179 | sub ebx, edx |
||
1180 | ret |
||
71 | diamond | 1181 | .eof: |
77 | diamond | 1182 | mov ebx, edx |
1183 | pop eax edx ecx |
||
1184 | sub ebx, edx |
||
1185 | jmp .reteof |
||
75 | diamond | 1186 | |
1187 | ;---------------------------------------------------------------- |
||
1188 | ; |
||
1189 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
||
1190 | ; |
||
1191 | ; esi points to filename |
||
78 | diamond | 1192 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
1193 | ; & flags (bitfields) |
||
1194 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
75 | diamond | 1195 | ; ecx number of blocks to read, 0+ |
1196 | ; edx mem location to return data |
||
1197 | ; |
||
77 | diamond | 1198 | ; ret ebx = blocks read or 0xffffffff folder not found |
75 | diamond | 1199 | ; eax = 0 ok read or other = errormsg |
1200 | ; |
||
1201 | ;-------------------------------------------------------------- |
||
1202 | fs_HdReadFolder: |
||
256 | diamond | 1203 | cmp [fs_type], 1 |
1204 | jz ntfs_HdReadFolder |
||
1378 | turbanoff | 1205 | cmp [fs_type], 2 |
1206 | jz ext2_HdReadFolder |
||
256 | diamond | 1207 | cmp [fs_type], 16 |
1208 | jz @f |
||
1209 | cmp [fs_type], 32 |
||
1210 | jz @f |
||
1211 | push ERROR_UNSUPPORTED_FS |
||
1212 | pop eax |
||
1213 | or ebx, -1 |
||
1214 | ret |
||
1215 | @@: |
||
75 | diamond | 1216 | mov eax, [ROOT_CLUSTER] |
1217 | push edi |
||
1218 | cmp byte [esi], 0 |
||
1219 | jz .doit |
||
1220 | call hd_find_lfn |
||
1221 | jnc .found |
||
1222 | pop edi |
||
1223 | or ebx, -1 |
||
1224 | mov eax, ERROR_FILE_NOT_FOUND |
||
1225 | ret |
||
1226 | .found: |
||
1227 | test byte [edi+11], 0x10 ; do not allow read files |
||
1228 | jnz .found_dir |
||
1229 | pop edi |
||
1230 | or ebx, -1 |
||
1231 | mov eax, ERROR_ACCESS_DENIED |
||
1232 | ret |
||
1233 | .found_dir: |
||
1234 | mov eax, [edi+20-2] |
||
1235 | mov ax, [edi+26] ; eax=cluster |
||
1236 | .doit: |
||
1237 | push esi ecx |
||
1238 | push ebp |
||
1239 | sub esp, 262*2 ; reserve space for LFN |
||
1240 | mov ebp, esp |
||
78 | diamond | 1241 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1242 | mov ebx, [ebx] |
||
75 | diamond | 1243 | ; init header |
1244 | push eax ecx |
||
1245 | mov edi, edx |
||
1246 | mov ecx, 32/4 |
||
1247 | xor eax, eax |
||
1248 | rep stosd |
||
1249 | pop ecx eax |
||
1250 | mov byte [edx], 1 ; version |
||
1251 | mov esi, edi ; esi points to BDFE |
||
1252 | .new_cluster: |
||
1253 | mov [cluster_tmp], eax |
||
1254 | test eax, eax |
||
1255 | jnz @f |
||
256 | diamond | 1256 | cmp [fs_type], 32 |
75 | diamond | 1257 | jz .notfound |
1258 | mov eax, [ROOT_START] |
||
1259 | push [ROOT_SECTORS] |
||
1260 | push ebx |
||
1261 | jmp .new_sector |
||
1262 | @@: |
||
1263 | dec eax |
||
1264 | dec eax |
||
1265 | imul eax, [SECTORS_PER_CLUSTER] |
||
1266 | push [SECTORS_PER_CLUSTER] |
||
1267 | add eax, [DATA_START] |
||
1268 | push ebx |
||
1269 | .new_sector: |
||
1270 | mov ebx, buffer |
||
1271 | mov edi, ebx |
||
1272 | call hd_read |
||
1273 | cmp [hd_error], 0 |
||
1274 | jnz .notfound2 |
||
1275 | add ebx, 512 |
||
1276 | push eax |
||
1277 | .l1: |
||
1278 | call fat_get_name |
||
1279 | jc .l2 |
||
1280 | cmp byte [edi+11], 0xF |
||
1281 | jnz .do_bdfe |
||
1282 | add edi, 0x20 |
||
1283 | cmp edi, ebx |
||
1284 | jb .do_bdfe |
||
1285 | pop eax |
||
1286 | inc eax |
||
1287 | dec dword [esp+4] |
||
1288 | jnz @f |
||
1289 | mov eax, [cluster_tmp] |
||
1290 | test eax, eax |
||
1291 | jz .done |
||
1292 | call get_FAT |
||
1293 | cmp [hd_error], 0 |
||
1294 | jnz .notfound2 |
||
1295 | cmp eax, 2 |
||
1296 | jb .done |
||
1297 | cmp eax, [fatRESERVED] |
||
1298 | jae .done |
||
1299 | push eax |
||
1300 | mov eax, [SECTORS_PER_CLUSTER] |
||
1301 | mov [esp+8], eax |
||
1302 | pop eax |
||
1303 | mov [cluster_tmp], eax |
||
1304 | dec eax |
||
1305 | dec eax |
||
1306 | imul eax, [SECTORS_PER_CLUSTER] |
||
1307 | add eax, [DATA_START] |
||
1308 | @@: |
||
1309 | mov ebx, buffer |
||
1310 | mov edi, ebx |
||
1311 | call hd_read |
||
1312 | cmp [hd_error], 0 |
||
1313 | jnz .notfound2 |
||
1314 | add ebx, 512 |
||
1315 | push eax |
||
1316 | .do_bdfe: |
||
1317 | inc dword [edx+8] ; new file found |
||
1318 | dec dword [esp+4] |
||
1319 | jns .l2 |
||
1320 | dec ecx |
||
1321 | js .l2 |
||
1322 | inc dword [edx+4] ; new file block copied |
||
1323 | call fat_entry_to_bdfe |
||
1324 | .l2: |
||
1325 | add edi, 0x20 |
||
1326 | cmp edi, ebx |
||
1327 | jb .l1 |
||
1328 | pop eax |
||
1329 | inc eax |
||
1330 | dec dword [esp+4] |
||
1331 | jnz .new_sector |
||
1332 | mov eax, [cluster_tmp] |
||
1333 | test eax, eax |
||
1334 | jz .done |
||
1335 | call get_FAT |
||
1336 | cmp [hd_error], 0 |
||
1337 | jnz .notfound2 |
||
1338 | cmp eax, 2 |
||
1339 | jb .done |
||
1340 | cmp eax, [fatRESERVED] |
||
1341 | jae .done |
||
1342 | push eax |
||
1343 | mov eax, [SECTORS_PER_CLUSTER] |
||
1344 | mov [esp+8], eax |
||
1345 | pop eax |
||
1346 | pop ebx |
||
1347 | add esp, 4 |
||
1348 | jmp .new_cluster |
||
1349 | .notfound2: |
||
1350 | add esp, 8 |
||
1351 | .notfound: |
||
1352 | add esp, 262*2+4 |
||
1353 | pop ebp ecx esi edi |
||
1354 | mov eax, ERROR_FILE_NOT_FOUND |
||
1355 | or ebx, -1 |
||
1356 | ret |
||
1357 | .done: |
||
1358 | add esp, 262*2+4+8 |
||
1359 | pop ebp |
||
77 | diamond | 1360 | mov ebx, [edx+4] |
75 | diamond | 1361 | xor eax, eax |
1362 | dec ecx |
||
1363 | js @f |
||
1364 | mov al, ERROR_END_OF_FILE |
||
1365 | @@: |
||
1366 | pop ecx esi edi |
||
1367 | ret |
||
1368 | |||
83 | diamond | 1369 | fat16_root_next: |
1370 | cmp edi, buffer+0x200-0x20 |
||
1371 | jae fat16_root_next_sector |
||
1372 | add edi, 0x20 |
||
1373 | ret ; CF=0 |
||
1374 | fat16_root_next_sector: |
||
1375 | ; read next sector |
||
171 | diamond | 1376 | push [longname_sec2] |
1377 | pop [longname_sec1] |
||
83 | diamond | 1378 | push ecx |
1379 | mov ecx, [eax+4] |
||
171 | diamond | 1380 | push ecx |
1381 | add ecx, [ROOT_START] |
||
1382 | mov [longname_sec2], ecx |
||
1383 | pop ecx |
||
83 | diamond | 1384 | inc ecx |
1385 | mov [eax+4], ecx |
||
1386 | cmp ecx, [ROOT_SECTORS] |
||
1387 | pop ecx |
||
1388 | jae fat16_root_first.readerr |
||
1389 | fat16_root_first: |
||
1390 | mov eax, [eax+4] |
||
1391 | add eax, [ROOT_START] |
||
1392 | push ebx |
||
1393 | mov edi, buffer |
||
1394 | mov ebx, edi |
||
1395 | call hd_read |
||
1396 | pop ebx |
||
1397 | cmp [hd_error], 0 |
||
1398 | jnz .readerr |
||
1399 | ret ; CF=0 |
||
1400 | .readerr: |
||
1401 | stc |
||
1402 | ret |
||
1403 | fat16_root_begin_write: |
||
1404 | push edi eax |
||
1405 | call fat16_root_first |
||
1406 | pop eax edi |
||
1407 | ret |
||
1408 | fat16_root_end_write: |
||
1409 | pusha |
||
1410 | mov eax, [eax+4] |
||
1411 | add eax, [ROOT_START] |
||
1412 | mov ebx, buffer |
||
1413 | call hd_write |
||
1414 | popa |
||
1415 | ret |
||
1416 | fat16_root_next_write: |
||
1417 | cmp edi, buffer+0x200 |
||
1418 | jae @f |
||
1419 | ret |
||
1420 | @@: |
||
1421 | call fat16_root_end_write |
||
1422 | jmp fat16_root_next_sector |
||
1423 | fat16_root_extend_dir: |
||
1424 | stc |
||
1425 | ret |
||
1426 | |||
1427 | fat_notroot_next: |
||
1428 | cmp edi, buffer+0x200-0x20 |
||
1429 | jae fat_notroot_next_sector |
||
1430 | add edi, 0x20 |
||
1431 | ret ; CF=0 |
||
1432 | fat_notroot_next_sector: |
||
171 | diamond | 1433 | push [longname_sec2] |
1434 | pop [longname_sec1] |
||
1435 | push eax |
||
1436 | call fat_get_sector |
||
1437 | mov [longname_sec2], eax |
||
1438 | pop eax |
||
83 | diamond | 1439 | push ecx |
1440 | mov ecx, [eax+4] |
||
1441 | inc ecx |
||
1442 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
1443 | jae fat_notroot_next_cluster |
||
1444 | mov [eax+4], ecx |
||
1445 | jmp @f |
||
1446 | fat_notroot_next_cluster: |
||
1447 | push eax |
||
1448 | mov eax, [eax] |
||
1449 | call get_FAT |
||
1450 | mov ecx, eax |
||
1451 | pop eax |
||
1452 | cmp [hd_error], 0 |
||
1453 | jnz fat_notroot_next_err |
||
1454 | cmp ecx, [fatRESERVED] |
||
1455 | jae fat_notroot_next_err |
||
1456 | mov [eax], ecx |
||
1457 | and dword [eax+4], 0 |
||
1458 | @@: |
||
1459 | pop ecx |
||
1460 | fat_notroot_first: |
||
1461 | call fat_get_sector |
||
1462 | push ebx |
||
1463 | mov edi, buffer |
||
1464 | mov ebx, edi |
||
1465 | call hd_read |
||
1466 | pop ebx |
||
1467 | cmp [hd_error], 0 |
||
1468 | jnz @f |
||
1469 | ret ; CF=0 |
||
1470 | fat_notroot_next_err: |
||
1471 | pop ecx |
||
1472 | @@: |
||
1473 | stc |
||
1474 | ret |
||
1475 | fat_notroot_begin_write: |
||
1476 | push eax edi |
||
1477 | call fat_notroot_first |
||
1478 | pop edi eax |
||
1479 | ret |
||
1480 | fat_notroot_end_write: |
||
1481 | call fat_get_sector |
||
1482 | push ebx |
||
1483 | mov ebx, buffer |
||
1484 | call hd_write |
||
1485 | pop ebx |
||
1486 | ret |
||
1487 | fat_notroot_next_write: |
||
1488 | cmp edi, buffer+0x200 |
||
1489 | jae @f |
||
1490 | ret |
||
1491 | @@: |
||
1492 | push eax |
||
1493 | call fat_notroot_end_write |
||
1494 | pop eax |
||
1495 | jmp fat_notroot_next_sector |
||
1496 | fat_notroot_extend_dir: |
||
1497 | push eax |
||
1498 | call get_free_FAT |
||
1499 | jnc .found |
||
1500 | pop eax |
||
1501 | ret ; CF=1 |
||
1502 | .found: |
||
1503 | push edx |
||
1504 | mov edx, [fatEND] |
||
1505 | call set_FAT |
||
1506 | mov edx, eax |
||
1507 | mov eax, [esp+4] |
||
1508 | mov eax, [eax] |
||
1509 | push edx |
||
1510 | call set_FAT |
||
1511 | pop edx |
||
1512 | cmp [hd_error], 0 |
||
1513 | jz @f |
||
1514 | pop edx |
||
1515 | pop eax |
||
1516 | stc |
||
1517 | ret |
||
1518 | @@: |
||
1519 | push ecx |
||
1520 | or ecx, -1 |
||
1521 | call add_disk_free_space |
||
1522 | ; zero new cluster |
||
1523 | mov ecx, 512/4 |
||
1524 | mov edi, buffer |
||
1525 | push edi |
||
1526 | xor eax, eax |
||
1527 | rep stosd |
||
1528 | pop edi |
||
1529 | pop ecx |
||
1530 | mov eax, [esp+4] |
||
1531 | mov [eax], edx |
||
1532 | and dword [eax+4], 0 |
||
1533 | pop edx |
||
1534 | mov eax, [eax] |
||
1535 | dec eax |
||
1536 | dec eax |
||
1537 | push ebx ecx |
||
1538 | mov ecx, [SECTORS_PER_CLUSTER] |
||
1539 | imul eax, ecx |
||
1540 | add eax, [DATA_START] |
||
1541 | mov ebx, edi |
||
1542 | @@: |
||
1543 | call hd_write |
||
1544 | inc eax |
||
1545 | loop @b |
||
1546 | pop ecx ebx eax |
||
1547 | clc |
||
1548 | ret |
||
1549 | |||
1550 | fat_get_sector: |
||
1551 | push ecx |
||
1552 | mov ecx, [eax] |
||
1553 | dec ecx |
||
1554 | dec ecx |
||
1555 | imul ecx, [SECTORS_PER_CLUSTER] |
||
1556 | add ecx, [DATA_START] |
||
1557 | add ecx, [eax+4] |
||
1558 | mov eax, ecx |
||
1559 | pop ecx |
||
1560 | ret |
||
1561 | |||
1562 | ;---------------------------------------------------------------- |
||
1563 | ; |
||
1564 | ; fs_HdRewrite - LFN variant for writing hard disk |
||
1565 | ; |
||
1566 | ; esi points to filename |
||
1567 | ; ebx ignored (reserved) |
||
1568 | ; ecx number of bytes to write, 0+ |
||
1569 | ; edx mem location to data |
||
1570 | ; |
||
1571 | ; ret ebx = number of written bytes |
||
1572 | ; eax = 0 ok read or other = errormsg |
||
1573 | ; |
||
1574 | ;-------------------------------------------------------------- |
||
1575 | fshrad: |
||
1576 | mov eax, ERROR_ACCESS_DENIED |
||
1577 | xor ebx, ebx |
||
1578 | ret |
||
1579 | fshrfs: |
||
1580 | mov eax, ERROR_UNKNOWN_FS |
||
1581 | xor ebx, ebx |
||
1582 | ret |
||
1583 | |||
321 | diamond | 1584 | fs_HdCreateFolder: |
1585 | mov al, 1 |
||
1586 | jmp fs_HdRewrite.common |
||
1587 | |||
83 | diamond | 1588 | fs_HdRewrite: |
321 | diamond | 1589 | xor eax, eax |
1590 | .common: |
||
256 | diamond | 1591 | cmp [fs_type], 1 |
1592 | jz ntfs_HdRewrite |
||
1378 | turbanoff | 1593 | cmp [fs_type], 2 |
1594 | jz ext2_HdRewrite |
||
256 | diamond | 1595 | cmp [fs_type], 16 |
1596 | jz @f |
||
1597 | cmp [fs_type], 32 |
||
1598 | jnz fshrfs |
||
1599 | @@: |
||
83 | diamond | 1600 | cmp byte [esi], 0 |
1601 | jz fshrad |
||
1602 | pushad |
||
521 | diamond | 1603 | xor edi, edi |
83 | diamond | 1604 | push esi |
521 | diamond | 1605 | test ebp, ebp |
1606 | jz @f |
||
1607 | mov esi, ebp |
||
83 | diamond | 1608 | @@: |
1609 | lodsb |
||
1610 | test al, al |
||
1611 | jz @f |
||
1612 | cmp al, '/' |
||
1613 | jnz @b |
||
521 | diamond | 1614 | lea edi, [esi-1] |
83 | diamond | 1615 | jmp @b |
1616 | @@: |
||
1617 | pop esi |
||
521 | diamond | 1618 | test edi, edi |
1619 | jnz .noroot |
||
83 | diamond | 1620 | test ebp, ebp |
521 | diamond | 1621 | jnz .hasebp |
83 | diamond | 1622 | mov ebp, [ROOT_CLUSTER] |
256 | diamond | 1623 | cmp [fs_type], 32 |
83 | diamond | 1624 | jz .pushnotroot |
1625 | push fat16_root_extend_dir |
||
1626 | push fat16_root_end_write |
||
1627 | push fat16_root_next_write |
||
1628 | push fat16_root_begin_write |
||
1629 | xor ebp, ebp |
||
1630 | push ebp |
||
1631 | push ebp |
||
1632 | push fat16_root_first |
||
1633 | push fat16_root_next |
||
1634 | jmp .common1 |
||
521 | diamond | 1635 | .hasebp: |
1636 | mov eax, ERROR_ACCESS_DENIED |
||
1637 | cmp byte [ebp], 0 |
||
1638 | jz .ret1 |
||
1639 | push ebp |
||
1640 | xor ebp, ebp |
||
1641 | call hd_find_lfn |
||
1642 | pop esi |
||
1643 | jc .notfound0 |
||
1644 | jmp .common0 |
||
83 | diamond | 1645 | .noroot: |
335 | diamond | 1646 | mov eax, ERROR_ACCESS_DENIED |
521 | diamond | 1647 | cmp byte [edi+1], 0 |
335 | diamond | 1648 | jz .ret1 |
83 | diamond | 1649 | ; check existence |
521 | diamond | 1650 | mov byte [edi], 0 |
1651 | push edi |
||
83 | diamond | 1652 | call hd_find_lfn |
521 | diamond | 1653 | pop esi |
1654 | mov byte [esi], '/' |
||
83 | diamond | 1655 | jnc @f |
521 | diamond | 1656 | .notfound0: |
83 | diamond | 1657 | mov eax, ERROR_FILE_NOT_FOUND |
1658 | .ret1: |
||
1659 | mov [esp+28], eax |
||
1660 | popad |
||
1661 | xor ebx, ebx |
||
1662 | ret |
||
1663 | @@: |
||
521 | diamond | 1664 | inc esi |
1665 | .common0: |
||
83 | diamond | 1666 | test byte [edi+11], 0x10 ; must be directory |
1667 | mov eax, ERROR_ACCESS_DENIED |
||
1668 | jz .ret1 |
||
1669 | mov ebp, [edi+20-2] |
||
1670 | mov bp, [edi+26] ; ebp=cluster |
||
1671 | mov eax, ERROR_FAT_TABLE |
||
1672 | cmp ebp, 2 |
||
1673 | jb .ret1 |
||
1674 | .pushnotroot: |
||
1675 | push fat_notroot_extend_dir |
||
1676 | push fat_notroot_end_write |
||
1677 | push fat_notroot_next_write |
||
1678 | push fat_notroot_begin_write |
||
1679 | push 0 |
||
1680 | push ebp |
||
1681 | push fat_notroot_first |
||
1682 | push fat_notroot_next |
||
1683 | .common1: |
||
1684 | call fat_find_lfn |
||
1685 | jc .notfound |
||
321 | diamond | 1686 | ; found |
91 | diamond | 1687 | test byte [edi+11], 10h |
321 | diamond | 1688 | jz .exists_file |
1689 | ; found directory; if we are creating directory, return OK, |
||
1690 | ; if we are creating file, say "access denied" |
||
1691 | add esp, 32 |
||
1692 | popad |
||
1693 | test al, al |
||
1694 | mov eax, ERROR_ACCESS_DENIED |
||
91 | diamond | 1695 | jz @f |
321 | diamond | 1696 | mov al, 0 |
1697 | @@: |
||
1698 | xor ebx, ebx |
||
1699 | ret |
||
1700 | .exists_file: |
||
1701 | ; found file; if we are creating directory, return "access denied", |
||
1702 | ; if we are creating file, delete existing file and continue |
||
1703 | cmp byte [esp+32+28], 0 |
||
1704 | jz @f |
||
91 | diamond | 1705 | add esp, 32 |
1706 | popad |
||
1707 | mov eax, ERROR_ACCESS_DENIED |
||
1708 | xor ebx, ebx |
||
1709 | ret |
||
1710 | @@: |
||
1711 | ; delete FAT chain |
||
83 | diamond | 1712 | push edi |
1713 | xor eax, eax |
||
1714 | mov dword [edi+28], eax ; zero size |
||
1715 | xor ecx, ecx |
||
1716 | mov eax, [edi+20-2] |
||
1717 | mov ax, [edi+26] |
||
1718 | mov word [edi+20], cx |
||
1719 | mov word [edi+26], cx |
||
1720 | test eax, eax |
||
1721 | jz .done1 |
||
1722 | @@: |
||
1723 | cmp eax, [fatRESERVED] |
||
1724 | jae .done1 |
||
1725 | push edx |
||
1726 | xor edx, edx |
||
1727 | call set_FAT |
||
1728 | mov eax, edx |
||
1729 | pop edx |
||
1730 | inc ecx |
||
1731 | jmp @b |
||
1732 | .done1: |
||
1733 | pop edi |
||
1734 | call get_time_for_file |
||
1735 | mov [edi+22], ax |
||
1736 | call get_date_for_file |
||
1737 | mov [edi+24], ax |
||
1738 | mov [edi+18], ax |
||
1739 | or byte [edi+11], 20h ; set 'archive' attribute |
||
1740 | jmp .doit |
||
1741 | .notfound: |
||
1742 | ; file is not found; generate short name |
||
1743 | call fat_name_is_legal |
||
1744 | jc @f |
||
1745 | add esp, 32 |
||
1746 | popad |
||
1747 | mov eax, ERROR_FILE_NOT_FOUND |
||
1748 | xor ebx, ebx |
||
1749 | ret |
||
1750 | @@: |
||
1751 | sub esp, 12 |
||
1752 | mov edi, esp |
||
1753 | call fat_gen_short_name |
||
1754 | .test_short_name_loop: |
||
1755 | push esi edi ecx |
||
1756 | mov esi, edi |
||
1757 | lea eax, [esp+12+12+8] |
||
1758 | mov [eax], ebp |
||
1759 | and dword [eax+4], 0 |
||
1760 | call dword [eax-4] |
||
1761 | jc .found |
||
1762 | .test_short_name_entry: |
||
1763 | cmp byte [edi+11], 0xF |
||
1764 | jz .test_short_name_cont |
||
1765 | mov ecx, 11 |
||
1766 | push esi edi |
||
1767 | repz cmpsb |
||
1768 | pop edi esi |
||
1769 | jz .short_name_found |
||
1770 | .test_short_name_cont: |
||
1771 | lea eax, [esp+12+12+8] |
||
1772 | call dword [eax-8] |
||
1773 | jnc .test_short_name_entry |
||
1774 | jmp .found |
||
1775 | .short_name_found: |
||
1776 | pop ecx edi esi |
||
1777 | call fat_next_short_name |
||
1778 | jnc .test_short_name_loop |
||
1779 | .disk_full: |
||
1780 | add esp, 12+32 |
||
1781 | popa |
||
1782 | mov eax, ERROR_DISK_FULL |
||
1783 | xor ebx, ebx |
||
1784 | ret |
||
1785 | .found: |
||
1786 | pop ecx edi esi |
||
1787 | ; now find space in directory |
||
1788 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
||
1789 | mov al, '~' |
||
1790 | push ecx edi |
||
1791 | mov ecx, 8 |
||
1792 | repnz scasb |
||
1793 | push 1 |
||
1794 | pop eax ; 1 entry |
||
1795 | jnz .notilde |
||
1796 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
||
1797 | xor eax, eax |
||
1798 | @@: |
||
1799 | cmp byte [esi], 0 |
||
1800 | jz @f |
||
1801 | inc esi |
||
1802 | inc eax |
||
1803 | jmp @b |
||
1804 | @@: |
||
1805 | sub esi, eax |
||
1806 | add eax, 12+13 |
||
1807 | mov ecx, 13 |
||
1808 | push edx |
||
1809 | cdq |
||
1810 | div ecx |
||
1811 | pop edx |
||
1812 | .notilde: |
||
1813 | push -1 |
||
1814 | push -1 |
||
1815 | push -1 |
||
1816 | ; find |
||
1817 | xor ecx, ecx |
||
1818 | push eax |
||
1819 | lea eax, [esp+16+8+12+8] |
||
1820 | mov [eax], ebp |
||
1821 | and dword [eax+4], 0 |
||
1822 | call dword [eax-4] |
||
1823 | pop eax |
||
1824 | jnc .scan_dir |
||
1825 | .fsfrfe3: |
||
1826 | add esp, 12+8+12+32 |
||
1827 | popad |
||
1828 | mov eax, 11 |
||
1829 | xor ebx, ebx |
||
1830 | ret |
||
1831 | .scan_dir: |
||
1832 | cmp byte [edi], 0 |
||
1833 | jz .free |
||
1834 | cmp byte [edi], 0xE5 |
||
1835 | jz .free |
||
1836 | xor ecx, ecx |
||
1837 | .scan_cont: |
||
1838 | push eax |
||
1839 | lea eax, [esp+16+8+12+8] |
||
1840 | call dword [eax-8] |
||
1841 | pop eax |
||
1842 | jnc .scan_dir |
||
1843 | cmp [hd_error], 0 |
||
1844 | jnz .fsfrfe3 |
||
1845 | push eax |
||
1846 | lea eax, [esp+16+8+12+8] |
||
1847 | call dword [eax+20] ; extend directory |
||
1848 | pop eax |
||
1849 | jnc .scan_dir |
||
1850 | add esp, 12+8+12+32 |
||
1851 | popad |
||
1852 | mov eax, ERROR_DISK_FULL |
||
1853 | xor ebx, ebx |
||
1854 | ret |
||
1855 | .free: |
||
1856 | test ecx, ecx |
||
1857 | jnz @f |
||
1858 | mov [esp], edi |
||
1859 | mov ecx, [esp+12+8+12+8] |
||
1860 | mov [esp+4], ecx |
||
1861 | mov ecx, [esp+12+8+12+12] |
||
1862 | mov [esp+8], ecx |
||
1863 | xor ecx, ecx |
||
1864 | @@: |
||
1865 | inc ecx |
||
1866 | cmp ecx, eax |
||
1867 | jb .scan_cont |
||
1868 | ; found! |
||
1869 | ; calculate name checksum |
||
1870 | push esi ecx |
||
1871 | mov esi, [esp+8+12] |
||
1872 | mov ecx, 11 |
||
1873 | xor eax, eax |
||
1874 | @@: |
||
1875 | ror al, 1 |
||
1876 | add al, [esi] |
||
1877 | inc esi |
||
1878 | loop @b |
||
1879 | pop ecx esi |
||
1880 | pop edi |
||
1881 | pop dword [esp+8+12+12] |
||
1882 | pop dword [esp+8+12+12] |
||
1883 | ; edi points to first entry in free chunk |
||
1884 | dec ecx |
||
1885 | jz .nolfn |
||
1886 | push esi |
||
1887 | push eax |
||
1888 | lea eax, [esp+8+8+12+8] |
||
1889 | call dword [eax+8] ; begin write |
||
1890 | mov al, 40h |
||
1891 | .writelfn: |
||
1892 | or al, cl |
||
1893 | mov esi, [esp+4] |
||
1894 | push ecx |
||
1895 | dec ecx |
||
1896 | imul ecx, 13 |
||
1897 | add esi, ecx |
||
1898 | stosb |
||
1899 | mov cl, 5 |
||
1900 | call fs_RamdiskRewrite.read_symbols |
||
1901 | mov ax, 0xF |
||
1902 | stosw |
||
1903 | mov al, [esp+4] |
||
1904 | stosb |
||
1905 | mov cl, 6 |
||
1906 | call fs_RamdiskRewrite.read_symbols |
||
1907 | xor eax, eax |
||
1908 | stosw |
||
1909 | mov cl, 2 |
||
1910 | call fs_RamdiskRewrite.read_symbols |
||
1911 | pop ecx |
||
1912 | lea eax, [esp+8+8+12+8] |
||
1913 | call dword [eax+12] ; next write |
||
1914 | xor eax, eax |
||
1915 | loop .writelfn |
||
1916 | pop eax |
||
1917 | pop esi |
||
1918 | ; lea eax, [esp+8+12+8] |
||
1919 | ; call dword [eax+16] ; end write |
||
1920 | .nolfn: |
||
1921 | xchg esi, [esp] |
||
1922 | mov ecx, 11 |
||
1923 | rep movsb |
||
1924 | mov word [edi], 20h ; attributes |
||
1925 | sub edi, 11 |
||
1926 | pop esi ecx |
||
1927 | add esp, 12 |
||
1928 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
||
1929 | call get_time_for_file |
||
1930 | mov [edi+14], ax ; creation time |
||
1931 | mov [edi+22], ax ; last write time |
||
1932 | call get_date_for_file |
||
1933 | mov [edi+16], ax ; creation date |
||
1934 | mov [edi+24], ax ; last write date |
||
1935 | mov [edi+18], ax ; last access date |
||
1936 | xor ecx, ecx |
||
1937 | mov word [edi+20], cx ; high word of cluster |
||
1938 | mov word [edi+26], cx ; low word of cluster - to be filled |
||
1939 | mov dword [edi+28], ecx ; file size - to be filled |
||
321 | diamond | 1940 | cmp byte [esp+32+28], cl |
1941 | jz .doit |
||
1942 | ; create directory |
||
1943 | mov byte [edi+11], 10h ; attributes: folder |
||
1944 | mov edx, edi |
||
1945 | lea eax, [esp+8] |
||
1946 | call dword [eax+16] ; flush directory |
||
1947 | push ecx |
||
1948 | mov ecx, [SECTORS_PER_CLUSTER] |
||
1949 | shl ecx, 9 |
||
1950 | jmp .doit2 |
||
83 | diamond | 1951 | .doit: |
1952 | lea eax, [esp+8] |
||
1953 | call dword [eax+16] ; flush directory |
||
1954 | push ecx |
||
1955 | mov ecx, [esp+4+32+24] |
||
321 | diamond | 1956 | .doit2: |
83 | diamond | 1957 | push ecx |
1958 | push edi |
||
1959 | mov esi, edx |
||
1960 | test ecx, ecx |
||
1961 | jz .done |
||
1962 | call get_free_FAT |
||
1963 | jc .diskfull |
||
1964 | push eax |
||
1965 | mov [edi+26], ax |
||
1966 | shr eax, 16 |
||
1967 | mov [edi+20], ax |
||
1968 | lea eax, [esp+16+8] |
||
1969 | call dword [eax+16] ; flush directory |
||
1970 | pop eax |
||
1971 | push edx |
||
1972 | mov edx, [fatEND] |
||
1973 | call set_FAT |
||
1974 | pop edx |
||
1975 | .write_cluster: |
||
1976 | push eax |
||
1977 | dec eax |
||
1978 | dec eax |
||
1979 | mov ebp, [SECTORS_PER_CLUSTER] |
||
1980 | imul eax, ebp |
||
1981 | add eax, [DATA_START] |
||
1982 | ; write data |
||
1983 | .write_sector: |
||
321 | diamond | 1984 | cmp byte [esp+16+32+28], 0 |
1985 | jnz .writedir |
||
83 | diamond | 1986 | mov ecx, 512 |
1987 | cmp dword [esp+8], ecx |
||
1988 | jb .writeshort |
||
1989 | ; we can write directly from given buffer |
||
1990 | mov ebx, esi |
||
1991 | add esi, ecx |
||
1992 | jmp .writecommon |
||
1993 | .writeshort: |
||
1994 | mov ecx, [esp+8] |
||
1995 | push ecx |
||
1996 | mov edi, buffer |
||
1997 | mov ebx, edi |
||
1998 | rep movsb |
||
321 | diamond | 1999 | .writedircont: |
83 | diamond | 2000 | mov ecx, buffer+0x200 |
2001 | sub ecx, edi |
||
2002 | push eax |
||
2003 | xor eax, eax |
||
2004 | rep stosb |
||
2005 | pop eax |
||
2006 | pop ecx |
||
2007 | .writecommon: |
||
2008 | call hd_write |
||
2009 | cmp [hd_error], 0 |
||
2010 | jnz .writeerr |
||
2011 | inc eax |
||
2012 | sub dword [esp+8], ecx |
||
2013 | jz .writedone |
||
2014 | dec ebp |
||
2015 | jnz .write_sector |
||
2016 | ; allocate new cluster |
||
2017 | pop eax |
||
2018 | mov ecx, eax |
||
2019 | call get_free_FAT |
||
2020 | jc .diskfull |
||
2021 | push edx |
||
2022 | mov edx, [fatEND] |
||
2023 | call set_FAT |
||
2024 | xchg eax, ecx |
||
2025 | mov edx, ecx |
||
2026 | call set_FAT |
||
2027 | pop edx |
||
2028 | xchg eax, ecx |
||
2029 | jmp .write_cluster |
||
2030 | .diskfull: |
||
2031 | mov eax, ERROR_DISK_FULL |
||
2032 | jmp .ret |
||
2033 | .writeerr: |
||
2034 | pop eax |
||
2035 | sub esi, ecx |
||
2036 | mov eax, 11 |
||
2037 | jmp .ret |
||
2038 | .writedone: |
||
2039 | pop eax |
||
2040 | .done: |
||
2041 | xor eax, eax |
||
2042 | .ret: |
||
2043 | pop edi ecx |
||
2044 | mov ebx, esi |
||
2045 | sub ebx, edx |
||
2046 | pop ebp |
||
2047 | mov [esp+32+28], eax |
||
2048 | lea eax, [esp+8] |
||
2049 | call dword [eax+8] |
||
2050 | mov [edi+28], ebx |
||
2051 | call dword [eax+16] |
||
2052 | mov [esp+32+16], ebx |
||
2053 | lea eax, [ebx+511] |
||
2054 | shr eax, 9 |
||
2055 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2056 | lea eax, [eax+ecx-1] |
||
2057 | xor edx, edx |
||
2058 | div ecx |
||
2059 | mov ecx, ebp |
||
2060 | sub ecx, eax |
||
2061 | call add_disk_free_space |
||
2062 | add esp, 32 |
||
2063 | call update_disk |
||
2064 | popad |
||
2065 | ret |
||
321 | diamond | 2066 | .writedir: |
2067 | push 512 |
||
2068 | mov edi, buffer |
||
2069 | mov ebx, edi |
||
2070 | mov ecx, [SECTORS_PER_CLUSTER] |
||
2071 | shl ecx, 9 |
||
2072 | cmp ecx, [esp+12] |
||
2073 | jnz .writedircont |
||
2074 | dec dword [esp+16] |
||
2075 | push esi |
||
2076 | mov ecx, 32/4 |
||
2077 | rep movsd |
||
2078 | pop esi |
||
2079 | mov dword [edi-32], '. ' |
||
2080 | mov dword [edi-32+4], ' ' |
||
2081 | mov dword [edi-32+8], ' ' |
||
2082 | mov byte [edi-32+11], 10h |
||
2083 | push esi |
||
2084 | mov ecx, 32/4 |
||
2085 | rep movsd |
||
2086 | pop esi |
||
2087 | mov dword [edi-32], '.. ' |
||
2088 | mov dword [edi-32+4], ' ' |
||
2089 | mov dword [edi-32+8], ' ' |
||
2090 | mov byte [edi-32+11], 10h |
||
2091 | mov ecx, [esp+20+8] |
||
2092 | cmp ecx, [ROOT_CLUSTER] |
||
2093 | jnz @f |
||
2094 | xor ecx, ecx |
||
2095 | @@: |
||
2096 | mov word [edi-32+26], cx |
||
2097 | shr ecx, 16 |
||
2098 | mov [edi-32+20], cx |
||
2099 | jmp .writedircont |
||
83 | diamond | 2100 | |
131 | diamond | 2101 | ;---------------------------------------------------------------- |
2102 | ; |
||
256 | diamond | 2103 | ; fs_HdWrite - LFN variant for writing to hard disk |
131 | diamond | 2104 | ; |
2105 | ; esi points to filename |
||
2106 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
2107 | ; may be ebx=0 - start from first byte |
||
2108 | ; ecx number of bytes to write, 0+ |
||
2109 | ; edx mem location to data |
||
2110 | ; |
||
2111 | ; ret ebx = bytes written (maybe 0) |
||
2112 | ; eax = 0 ok write or other = errormsg |
||
2113 | ; |
||
2114 | ;-------------------------------------------------------------- |
||
2115 | fs_HdWrite.access_denied: |
||
2116 | push ERROR_ACCESS_DENIED |
||
2117 | fs_HdWrite.ret0: |
||
2118 | pop eax |
||
2119 | xor ebx, ebx |
||
2120 | ret |
||
2121 | |||
2122 | fs_HdWrite.ret11: |
||
2123 | push 11 |
||
2124 | jmp fs_HdWrite.ret0 |
||
2125 | |||
2126 | fs_HdWrite: |
||
256 | diamond | 2127 | cmp [fs_type], 1 |
2128 | jz ntfs_HdWrite |
||
1378 | turbanoff | 2129 | cmp [fs_type], 2 |
2130 | jz ext2_HdWrite |
||
256 | diamond | 2131 | cmp [fs_type], 16 |
2132 | jz @f |
||
2133 | cmp [fs_type], 32 |
||
2134 | jz @f |
||
131 | diamond | 2135 | push ERROR_UNKNOWN_FS |
2136 | jmp .ret0 |
||
2137 | @@: |
||
2138 | cmp byte [esi], 0 |
||
2139 | jz .access_denied |
||
2140 | pushad |
||
2141 | call hd_find_lfn |
||
2142 | pushfd |
||
2143 | cmp [hd_error], 0 |
||
2144 | jz @f |
||
2145 | popfd |
||
2146 | popad |
||
2147 | push 11 |
||
2148 | jmp .ret0 |
||
2149 | @@: |
||
2150 | popfd |
||
2151 | jnc .found |
||
2152 | popad |
||
2153 | push ERROR_FILE_NOT_FOUND |
||
2154 | jmp .ret0 |
||
2155 | .found: |
||
2156 | ; FAT does not support files larger than 4GB |
||
2157 | test ebx, ebx |
||
2158 | jz .l1 |
||
2159 | cmp dword [ebx+4], 0 |
||
2160 | jz @f |
||
2161 | .eof: |
||
2162 | popad |
||
2163 | push ERROR_END_OF_FILE |
||
2164 | jmp .ret0 |
||
2165 | @@: |
||
2166 | mov ebx, [ebx] |
||
2167 | .l1: |
||
2168 | ; now edi points to direntry, ebx=start byte to write, |
||
2169 | ; ecx=number of bytes to write, edx=data pointer |
||
2170 | |||
2171 | ; extend file if needed |
||
2172 | add ecx, ebx |
||
2173 | jc .eof ; FAT does not support files larger than 4GB |
||
2174 | push eax ; save directory sector |
||
2175 | push 0 ; return value=0 |
||
2176 | |||
2177 | call get_time_for_file |
||
2178 | mov [edi+22], ax ; last write time |
||
2179 | call get_date_for_file |
||
2180 | mov [edi+24], ax ; last write date |
||
2181 | mov [edi+18], ax ; last access date |
||
2182 | |||
2183 | push dword [edi+28] ; save current file size |
||
2184 | cmp ecx, [edi+28] |
||
2185 | jbe .length_ok |
||
2186 | cmp ecx, ebx |
||
2187 | jz .length_ok |
||
2188 | call hd_extend_file |
||
2189 | jnc .length_ok |
||
2190 | mov [esp+4], eax |
||
2191 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
||
2192 | ; First two cases are fatal errors, in third case we may write some data |
||
2193 | cmp al, ERROR_DISK_FULL |
||
2194 | jz .disk_full |
||
2195 | pop eax |
||
2196 | pop eax |
||
2197 | mov [esp+4+28], eax |
||
2198 | pop eax |
||
2199 | popad |
||
2200 | xor ebx, ebx |
||
2201 | ret |
||
2202 | .disk_full: |
||
2203 | ; correct number of bytes to write |
||
2204 | mov ecx, [edi+28] |
||
2205 | cmp ecx, ebx |
||
2206 | ja .length_ok |
||
2207 | .ret: |
||
2208 | call update_disk |
||
2209 | cmp [hd_error], 0 |
||
2210 | jz @f |
||
2211 | mov byte [esp+4], 11 |
||
2212 | @@: |
||
2213 | pop eax |
||
2214 | pop eax |
||
2215 | mov [esp+4+28], eax ; eax=return value |
||
2216 | pop eax |
||
2217 | sub edx, [esp+20] |
||
2218 | mov [esp+16], edx ; ebx=number of written bytes |
||
2219 | popad |
||
2220 | ret |
||
2221 | .length_ok: |
||
2222 | mov esi, [edi+28] |
||
2223 | mov eax, [edi+20-2] |
||
2224 | mov ax, [edi+26] |
||
2225 | mov edi, eax ; edi=current cluster |
||
2226 | xor ebp, ebp ; ebp=current sector in cluster |
||
2227 | ; save directory |
||
2228 | mov eax, [esp+8] |
||
2229 | push ebx |
||
2230 | mov ebx, buffer |
||
2231 | call hd_write |
||
2232 | pop ebx |
||
2233 | cmp [hd_error], 0 |
||
2234 | jz @f |
||
2235 | .device_err: |
||
2236 | mov byte [esp+4], 11 |
||
2237 | jmp .ret |
||
2238 | @@: |
||
2239 | |||
2240 | ; now ebx=start pos, ecx=end pos, both lie inside file |
||
2241 | sub ecx, ebx |
||
2242 | jz .ret |
||
2243 | .write_loop: |
||
321 | diamond | 2244 | ; skip unmodified sectors |
2245 | cmp dword [esp], 0x200 |
||
2246 | jb .modify |
||
2247 | sub ebx, 0x200 |
||
2248 | jae .skip |
||
2249 | add ebx, 0x200 |
||
2250 | .modify: |
||
131 | diamond | 2251 | ; get length of data in current sector |
2252 | push ecx |
||
2253 | sub ebx, 0x200 |
||
2254 | jb .hasdata |
||
2255 | neg ebx |
||
2256 | xor ecx, ecx |
||
2257 | jmp @f |
||
2258 | .hasdata: |
||
2259 | neg ebx |
||
2260 | cmp ecx, ebx |
||
2261 | jbe @f |
||
2262 | mov ecx, ebx |
||
2263 | @@: |
||
2264 | ; get current sector number |
||
2265 | mov eax, edi |
||
2266 | dec eax |
||
2267 | dec eax |
||
2268 | imul eax, [SECTORS_PER_CLUSTER] |
||
2269 | add eax, [DATA_START] |
||
2270 | add eax, ebp |
||
2271 | ; load sector if needed |
||
2272 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
||
2273 | jz .noread |
||
2274 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
||
2275 | jz .noread |
||
2276 | cmp ecx, esi ; (same for the last sector) |
||
2277 | jz .noread |
||
2278 | push ebx |
||
2279 | mov ebx, buffer |
||
2280 | call hd_read |
||
2281 | pop ebx |
||
2282 | cmp [hd_error], 0 |
||
2283 | jz @f |
||
2284 | .device_err2: |
||
2285 | pop ecx |
||
2286 | jmp .device_err |
||
2287 | @@: |
||
2288 | .noread: |
||
2289 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
||
2290 | push eax ecx edi |
||
2291 | xor eax, eax |
||
2292 | mov ecx, 0x200 |
||
2293 | sub ecx, [esp+4+12] |
||
2294 | jbe @f |
||
2295 | mov edi, buffer |
||
2296 | add edi, [esp+4+12] |
||
2297 | rep stosb |
||
2298 | @@: |
||
2299 | ; zero uninitialized data in the last sector |
||
2300 | mov ecx, 0x200 |
||
2301 | sub ecx, esi |
||
2302 | jbe @f |
||
2303 | mov edi, buffer |
||
2304 | add edi, esi |
||
2305 | rep stosb |
||
2306 | @@: |
||
321 | diamond | 2307 | pop edi ecx |
131 | diamond | 2308 | ; copy new data |
2309 | mov eax, edx |
||
2310 | neg ebx |
||
2311 | jecxz @f |
||
2312 | add ebx, buffer+0x200 |
||
2313 | call memmove |
||
2314 | xor ebx, ebx |
||
2315 | @@: |
||
2316 | pop eax |
||
2317 | ; save sector |
||
2318 | push ebx |
||
2319 | mov ebx, buffer |
||
2320 | call hd_write |
||
2321 | pop ebx |
||
2322 | cmp [hd_error], 0 |
||
2323 | jnz .device_err2 |
||
2324 | add edx, ecx |
||
2325 | sub [esp], ecx |
||
2326 | pop ecx |
||
2327 | jz .ret |
||
321 | diamond | 2328 | .skip: |
131 | diamond | 2329 | ; next sector |
2330 | inc ebp |
||
2331 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2332 | jb @f |
||
2333 | xor ebp, ebp |
||
2334 | mov eax, edi |
||
2335 | call get_FAT |
||
2336 | mov edi, eax |
||
2337 | cmp [hd_error], 0 |
||
2338 | jnz .device_err |
||
2339 | @@: |
||
2340 | sub esi, 0x200 |
||
2341 | jae @f |
||
2342 | xor esi, esi |
||
2343 | @@: |
||
2344 | sub dword [esp], 0x200 |
||
2345 | jae @f |
||
2346 | and dword [esp], 0 |
||
2347 | @@: jmp .write_loop |
||
2348 | |||
2349 | hd_extend_file.zero_size: |
||
2350 | xor eax, eax |
||
2351 | jmp hd_extend_file.start_extend |
||
2352 | |||
2353 | ; extends file on hd to given size (new data area is undefined) |
||
2354 | ; in: edi->direntry, ecx=new size |
||
133 | diamond | 2355 | ; out: CF=0 => OK, eax=0 |
131 | diamond | 2356 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
2357 | hd_extend_file: |
||
2358 | push ebp |
||
2359 | mov ebp, [SECTORS_PER_CLUSTER] |
||
2360 | imul ebp, [BYTES_PER_SECTOR] |
||
2361 | push ecx |
||
2362 | ; find the last cluster of file |
||
2363 | mov eax, [edi+20-2] |
||
2364 | mov ax, [edi+26] |
||
2365 | mov ecx, [edi+28] |
||
2366 | jecxz .zero_size |
||
2367 | .last_loop: |
||
2368 | sub ecx, ebp |
||
2369 | jbe .last_found |
||
2370 | call get_FAT |
||
2371 | cmp [hd_error], 0 |
||
2372 | jz @f |
||
2373 | .device_err: |
||
2374 | pop ecx |
||
2375 | .device_err2: |
||
2376 | pop ebp |
||
2377 | push 11 |
||
2378 | .ret_err: |
||
2379 | pop eax |
||
2380 | stc |
||
2381 | ret |
||
2382 | @@: |
||
2383 | cmp eax, 2 |
||
2384 | jb .fat_err |
||
2385 | cmp eax, [fatRESERVED] |
||
2386 | jb .last_loop |
||
2387 | .fat_err: |
||
2388 | pop ecx ebp |
||
2389 | push ERROR_FAT_TABLE |
||
2390 | jmp .ret_err |
||
2391 | .last_found: |
||
2392 | push eax |
||
2393 | call get_FAT |
||
2394 | cmp [hd_error], 0 |
||
2395 | jz @f |
||
2396 | pop eax |
||
2397 | jmp .device_err |
||
2398 | @@: |
||
2399 | cmp eax, [fatRESERVED] |
||
2400 | pop eax |
||
2401 | jb .fat_err |
||
2402 | ; set length to full number of clusters |
||
2403 | sub [edi+28], ecx |
||
2404 | .start_extend: |
||
2405 | pop ecx |
||
2406 | ; now do extend |
||
2407 | push edx |
||
2408 | mov edx, 2 ; start scan from cluster 2 |
||
2409 | .extend_loop: |
||
2410 | cmp [edi+28], ecx |
||
2411 | jae .extend_done |
||
2412 | ; add new cluster |
||
2413 | push eax |
||
2414 | call get_free_FAT |
||
2415 | jc .disk_full |
||
2416 | mov edx, [fatEND] |
||
2417 | call set_FAT |
||
2418 | mov edx, eax |
||
2419 | pop eax |
||
2420 | test eax, eax |
||
2421 | jz .first_cluster |
||
2422 | push edx |
||
2423 | call set_FAT |
||
2424 | pop edx |
||
2425 | jmp @f |
||
2426 | .first_cluster: |
||
2427 | ror edx, 16 |
||
2428 | mov [edi+20], dx |
||
2429 | ror edx, 16 |
||
2430 | mov [edi+26], dx |
||
2431 | @@: |
||
133 | diamond | 2432 | push ecx |
2433 | mov ecx, -1 |
||
2434 | call add_disk_free_space |
||
2435 | pop ecx |
||
131 | diamond | 2436 | mov eax, edx |
2437 | cmp [hd_error], 0 |
||
2438 | jnz .device_err3 |
||
2439 | add [edi+28], ebp |
||
2440 | jmp .extend_loop |
||
2441 | .extend_done: |
||
2442 | mov [edi+28], ecx |
||
2443 | pop edx ebp |
||
133 | diamond | 2444 | xor eax, eax ; CF=0 |
131 | diamond | 2445 | ret |
2446 | .device_err3: |
||
2447 | pop edx |
||
2448 | jmp .device_err2 |
||
2449 | .disk_full: |
||
2450 | pop eax edx ebp |
||
2451 | push ERROR_DISK_FULL |
||
2452 | pop eax |
||
2453 | cmp [hd_error], 0 |
||
2454 | jz @f |
||
2455 | mov al, 11 |
||
2456 | @@: stc |
||
2457 | ret |
||
2458 | |||
133 | diamond | 2459 | ;---------------------------------------------------------------- |
2460 | ; |
||
2461 | ; fs_HdSetFileEnd - set end of file on hard disk |
||
2462 | ; |
||
2463 | ; esi points to filename |
||
2464 | ; ebx points to 64-bit number = new file size |
||
2465 | ; ecx ignored (reserved) |
||
2466 | ; edx ignored (reserved) |
||
2467 | ; |
||
2468 | ; ret eax = 0 ok or other = errormsg |
||
2469 | ; |
||
2470 | ;-------------------------------------------------------------- |
||
2471 | fs_HdSetFileEnd: |
||
256 | diamond | 2472 | cmp [fs_type], 1 |
2473 | jz ntfs_HdSetFileEnd |
||
1378 | turbanoff | 2474 | cmp [fs_type], 2 |
2475 | jz ext2_HdSetFileEnd |
||
256 | diamond | 2476 | cmp [fs_type], 16 |
2477 | jz @f |
||
2478 | cmp [fs_type], 32 |
||
2479 | jz @f |
||
133 | diamond | 2480 | push ERROR_UNKNOWN_FS |
2481 | .ret: |
||
2482 | pop eax |
||
2483 | ret |
||
2484 | @@: |
||
2485 | cmp byte [esi], 0 |
||
2486 | jnz @f |
||
2487 | .access_denied: |
||
2488 | push ERROR_ACCESS_DENIED |
||
2489 | jmp .ret |
||
2490 | @@: |
||
2491 | push edi |
||
2492 | call hd_find_lfn |
||
2493 | pushfd |
||
2494 | cmp [hd_error], 0 |
||
2495 | jz @f |
||
2496 | popfd |
||
2497 | push 11 |
||
2498 | jmp .ret |
||
2499 | @@: |
||
2500 | popfd |
||
2501 | jnc @f |
||
2502 | pop edi |
||
2503 | push ERROR_FILE_NOT_FOUND |
||
2504 | jmp .ret |
||
2505 | @@: |
||
2506 | ; must not be directory |
||
2507 | test byte [edi+11], 10h |
||
2508 | jz @f |
||
2509 | pop edi |
||
2510 | jmp .access_denied |
||
2511 | @@: |
||
2512 | ; file size must not exceed 4 Gb |
||
2513 | cmp dword [ebx+4], 0 |
||
2514 | jz @f |
||
2515 | pop edi |
||
2516 | push ERROR_END_OF_FILE |
||
2517 | jmp .ret |
||
2518 | @@: |
||
2519 | push eax ; save directory sector |
||
2520 | ; set file modification date/time to current |
||
2521 | call fat_update_datetime |
||
2522 | mov eax, [ebx] |
||
2523 | cmp eax, [edi+28] |
||
2524 | jb .truncate |
||
2525 | ja .expand |
||
2526 | pop eax |
||
2527 | mov ebx, buffer |
||
2528 | call hd_write |
||
2529 | pop edi |
||
2530 | xor eax, eax |
||
2531 | cmp [hd_error], 0 |
||
2532 | jz @f |
||
2533 | mov al, 11 |
||
2534 | @@: |
||
2535 | ret |
||
2536 | .expand: |
||
2537 | push ebx ebp ecx |
||
2538 | push dword [edi+28] ; save old size |
||
2539 | mov ecx, eax |
||
2540 | call hd_extend_file |
||
2541 | push eax ; return code |
||
2542 | jnc .expand_ok |
||
2543 | cmp al, ERROR_DISK_FULL |
||
2544 | jz .disk_full |
||
2545 | .pop_ret: |
||
2546 | call update_disk |
||
2547 | pop eax ecx ebp ebx ecx edi edi |
||
2548 | ret |
||
2549 | .expand_ok: |
||
2550 | .disk_full: |
||
2551 | ; save directory |
||
2552 | mov eax, [edi+28] |
||
2553 | xchg eax, [esp+20] |
||
2554 | mov ebx, buffer |
||
2555 | call hd_write |
||
2556 | mov eax, [edi+20-2] |
||
2557 | mov ax, [edi+26] |
||
2558 | mov edi, eax |
||
2559 | cmp [hd_error], 0 |
||
2560 | jz @f |
||
2561 | .pop_ret11: |
||
2562 | mov byte [esp], 11 |
||
2563 | jmp .pop_ret |
||
2564 | @@: |
||
2565 | ; now zero new data |
||
2566 | xor ebp, ebp |
||
2567 | ; edi=current cluster, ebp=sector in cluster |
||
2568 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
||
2569 | .zero_loop: |
||
2570 | sub dword [esp+4], 0x200 |
||
2571 | jae .next_cluster |
||
2572 | lea eax, [edi-2] |
||
2573 | imul eax, [SECTORS_PER_CLUSTER] |
||
2574 | add eax, [DATA_START] |
||
2575 | add eax, ebp |
||
2576 | cmp dword [esp+4], -0x200 |
||
2577 | jz .noread |
||
2578 | mov ebx, buffer |
||
2579 | call hd_read |
||
2580 | cmp [hd_error], 0 |
||
2581 | jnz .err_next |
||
2582 | .noread: |
||
2583 | mov ecx, [esp+4] |
||
2584 | neg ecx |
||
2585 | push edi |
||
2586 | mov edi, buffer+0x200 |
||
2587 | add edi, [esp+8] |
||
2588 | push eax |
||
2589 | xor eax, eax |
||
2590 | mov [esp+12], eax |
||
2591 | rep stosb |
||
2592 | pop eax |
||
2593 | pop edi |
||
2594 | call hd_write |
||
2595 | cmp [hd_error], 0 |
||
2596 | jz .next_cluster |
||
2597 | .err_next: |
||
2598 | mov byte [esp], 11 |
||
2599 | .next_cluster: |
||
2600 | sub dword [esp+20], 0x200 |
||
2601 | jbe .pop_ret |
||
2602 | inc ebp |
||
2603 | cmp ebp, [SECTORS_PER_CLUSTER] |
||
2604 | jb .zero_loop |
||
2605 | xor ebp, ebp |
||
2606 | mov eax, edi |
||
2607 | call get_FAT |
||
2608 | mov edi, eax |
||
2609 | cmp [hd_error], 0 |
||
2610 | jnz .pop_ret11 |
||
2611 | jmp .zero_loop |
||
2612 | .truncate: |
||
2613 | mov [edi+28], eax |
||
2614 | push ecx |
||
2615 | mov ecx, [edi+20-2] |
||
2616 | mov cx, [edi+26] |
||
2617 | push eax |
||
2618 | test eax, eax |
||
2619 | jz .zero_size |
||
2620 | ; find new last cluster |
||
2621 | @@: |
||
2622 | mov eax, [SECTORS_PER_CLUSTER] |
||
2623 | shl eax, 9 |
||
2624 | sub [esp], eax |
||
2625 | jbe @f |
||
2626 | mov eax, ecx |
||
2627 | call get_FAT |
||
2628 | mov ecx, eax |
||
2629 | cmp [hd_error], 0 |
||
2630 | jz @b |
||
2631 | .device_err3: |
||
2632 | pop eax ecx eax edi |
||
2633 | push 11 |
||
2634 | pop eax |
||
2635 | ret |
||
2636 | @@: |
||
2637 | ; we will zero data at the end of last sector - remember it |
||
2638 | push ecx |
||
2639 | ; terminate FAT chain |
||
2640 | push edx |
||
2641 | mov eax, ecx |
||
2642 | mov edx, [fatEND] |
||
2643 | call set_FAT |
||
2644 | mov eax, edx |
||
2645 | pop edx |
||
2646 | cmp [hd_error], 0 |
||
2647 | jz @f |
||
2648 | .device_err4: |
||
2649 | pop ecx |
||
2650 | jmp .device_err3 |
||
2651 | .zero_size: |
||
2652 | and word [edi+20], 0 |
||
2653 | and word [edi+26], 0 |
||
2654 | push 0 |
||
2655 | mov eax, ecx |
||
2656 | @@: |
||
2657 | ; delete FAT chain |
||
2658 | call clear_cluster_chain |
||
2659 | cmp [hd_error], 0 |
||
2660 | jnz .device_err4 |
||
2661 | ; save directory |
||
2662 | mov eax, [esp+12] |
||
2663 | push ebx |
||
2664 | mov ebx, buffer |
||
2665 | call hd_write |
||
2666 | pop ebx |
||
2667 | cmp [hd_error], 0 |
||
2668 | jnz .device_err4 |
||
2669 | ; zero last sector, ignore errors |
||
2670 | pop ecx |
||
2671 | pop eax |
||
2672 | dec ecx |
||
2673 | imul ecx, [SECTORS_PER_CLUSTER] |
||
2674 | add ecx, [DATA_START] |
||
2675 | push eax |
||
2676 | sar eax, 9 |
||
2677 | add ecx, eax |
||
2678 | pop eax |
||
2679 | and eax, 0x1FF |
||
2680 | jz .truncate_done |
||
2681 | push ebx eax |
||
2682 | mov eax, ecx |
||
2683 | mov ebx, buffer |
||
2684 | call hd_read |
||
2685 | pop eax |
||
2686 | lea edi, [buffer+eax] |
||
2687 | push ecx |
||
2688 | mov ecx, 0x200 |
||
2689 | sub ecx, eax |
||
2690 | xor eax, eax |
||
2691 | rep stosb |
||
2692 | pop eax |
||
2693 | call hd_write |
||
2694 | pop ebx |
||
2695 | .truncate_done: |
||
2696 | pop ecx eax edi |
||
2697 | call update_disk |
||
2698 | xor eax, eax |
||
2699 | cmp [hd_error], 0 |
||
2700 | jz @f |
||
2701 | mov al, 11 |
||
2702 | @@: |
||
2703 | ret |
||
2704 | |||
86 | diamond | 2705 | fs_HdGetFileInfo: |
256 | diamond | 2706 | cmp [fs_type], 1 |
2707 | jz ntfs_HdGetFileInfo |
||
1378 | turbanoff | 2708 | cmp [fs_type], 2 |
2709 | jz ext2_HdGetFileInfo |
||
256 | diamond | 2710 | cmp [fs_type], 16 |
2711 | jz @f |
||
2712 | cmp [fs_type], 32 |
||
2713 | jz @f |
||
86 | diamond | 2714 | mov eax, ERROR_UNKNOWN_FS |
2715 | ret |
||
2716 | @@: |
||
2717 | cmp byte [esi], 0 |
||
2718 | jnz @f |
||
2719 | mov eax, 2 |
||
2720 | ret |
||
2721 | @@: |
||
2722 | push edi |
||
2723 | call hd_find_lfn |
||
2724 | pushfd |
||
2725 | cmp [hd_error], 0 |
||
2726 | jz @f |
||
2727 | popfd |
||
2728 | pop edi |
||
2729 | mov eax, 11 |
||
2730 | ret |
||
2731 | @@: |
||
2732 | popfd |
||
2733 | jmp fs_GetFileInfo_finish |
||
2734 | |||
2735 | fs_HdSetFileInfo: |
||
256 | diamond | 2736 | cmp [fs_type], 1 |
2737 | jz ntfs_HdSetFileInfo |
||
1378 | turbanoff | 2738 | cmp [fs_type], 2 |
2739 | jz ext2_HdSetFileInfo |
||
256 | diamond | 2740 | cmp [fs_type], 16 |
2741 | jz @f |
||
2742 | cmp [fs_type], 32 |
||
2743 | jz @f |
||
86 | diamond | 2744 | mov eax, ERROR_UNKNOWN_FS |
2745 | ret |
||
2746 | @@: |
||
2747 | cmp byte [esi], 0 |
||
2748 | jnz @f |
||
2749 | mov eax, 2 |
||
2750 | ret |
||
2751 | @@: |
||
2752 | push edi |
||
2753 | call hd_find_lfn |
||
2754 | pushfd |
||
2755 | cmp [hd_error], 0 |
||
2756 | jz @f |
||
2757 | popfd |
||
2758 | pop edi |
||
2759 | mov eax, 11 |
||
2760 | ret |
||
2761 | @@: |
||
2762 | popfd |
||
2763 | jnc @f |
||
2764 | pop edi |
||
2765 | mov eax, ERROR_FILE_NOT_FOUND |
||
2766 | ret |
||
2767 | @@: |
||
2768 | push eax |
||
2769 | call bdfe_to_fat_entry |
||
2770 | pop eax |
||
2771 | mov ebx, buffer |
||
2772 | call hd_write |
||
2773 | call update_disk |
||
2774 | pop edi |
||
2775 | xor eax, eax |
||
2776 | ret |
||
2777 | |||
91 | diamond | 2778 | ;---------------------------------------------------------------- |
2779 | ; |
||
171 | diamond | 2780 | ; fs_HdDelete - delete file or empty folder from hard disk |
2781 | ; |
||
2782 | ; esi points to filename |
||
2783 | ; |
||
2784 | ; ret eax = 0 ok or other = errormsg |
||
2785 | ; |
||
2786 | ;-------------------------------------------------------------- |
||
2787 | fs_HdDelete: |
||
256 | diamond | 2788 | cmp [fs_type], 1 |
2789 | jz ntfs_HdDelete |
||
1378 | turbanoff | 2790 | cmp [fs_type], 1 |
2791 | jz ext2_HdDelete |
||
256 | diamond | 2792 | cmp [fs_type], 16 |
2793 | jz @f |
||
2794 | cmp [fs_type], 32 |
||
2795 | jz @f |
||
171 | diamond | 2796 | push ERROR_UNKNOWN_FS |
2797 | .pop_ret: |
||
2798 | pop eax |
||
2799 | ret |
||
2800 | @@: |
||
2801 | cmp byte [esi], 0 |
||
2802 | jnz @f |
||
2803 | ; cannot delete root! |
||
2804 | .access_denied: |
||
2805 | push ERROR_ACCESS_DENIED |
||
2806 | jmp .pop_ret |
||
2807 | @@: |
||
2808 | and [longname_sec1], 0 |
||
2809 | and [longname_sec2], 0 |
||
2810 | push edi |
||
2811 | call hd_find_lfn |
||
2812 | jnc .found |
||
2813 | pop edi |
||
2814 | push ERROR_FILE_NOT_FOUND |
||
2815 | jmp .pop_ret |
||
2816 | .found: |
||
2817 | cmp dword [edi], '. ' |
||
2818 | jz .access_denied2 |
||
2819 | cmp dword [edi], '.. ' |
||
2820 | jz .access_denied2 |
||
2821 | test byte [edi+11], 10h |
||
2822 | jz .dodel |
||
2823 | ; we can delete only empty folders! |
||
2824 | pushad |
||
2825 | mov ebp, [edi+20-2] |
||
2826 | mov bp, [edi+26] |
||
2827 | xor ecx, ecx |
||
2828 | lea eax, [ebp-2] |
||
2829 | imul eax, [SECTORS_PER_CLUSTER] |
||
2830 | add eax, [DATA_START] |
||
2831 | mov ebx, buffer |
||
2832 | call hd_read |
||
2833 | cmp [hd_error], 0 |
||
2834 | jnz .err1 |
||
2835 | add ebx, 2*0x20 |
||
2836 | .checkempty: |
||
2837 | cmp byte [ebx], 0 |
||
2838 | jz .empty |
||
2839 | cmp byte [ebx], 0xE5 |
||
2840 | jnz .notempty |
||
2841 | add ebx, 0x20 |
||
2842 | cmp ebx, buffer+0x200 |
||
2843 | jb .checkempty |
||
2844 | inc ecx |
||
2845 | cmp ecx, [SECTORS_PER_CLUSTER] |
||
2846 | jb @f |
||
2847 | mov eax, ebp |
||
2848 | call get_FAT |
||
2849 | cmp [hd_error], 0 |
||
2850 | jnz .err1 |
||
2851 | mov ebp, eax |
||
2852 | xor ecx, ecx |
||
2853 | @@: |
||
2854 | lea eax, [ebp-2] |
||
2855 | imul eax, [SECTORS_PER_CLUSTER] |
||
2856 | add eax, [DATA_START] |
||
2857 | add eax, ecx |
||
2858 | mov ebx, buffer |
||
2859 | call hd_read |
||
2860 | cmp [hd_error], 0 |
||
2861 | jz .checkempty |
||
2862 | .err1: |
||
2863 | popad |
||
2864 | .err2: |
||
2865 | pop edi |
||
2866 | push 11 |
||
2867 | pop eax |
||
2868 | ret |
||
2869 | .notempty: |
||
2870 | popad |
||
2871 | .access_denied2: |
||
2872 | pop edi |
||
2873 | push ERROR_ACCESS_DENIED |
||
2874 | pop eax |
||
2875 | ret |
||
2876 | .empty: |
||
2877 | popad |
||
2878 | push ebx |
||
2879 | mov ebx, buffer |
||
2880 | call hd_read |
||
2881 | pop ebx |
||
2882 | cmp [hd_error], 0 |
||
2883 | jnz .err2 |
||
2884 | .dodel: |
||
2885 | push eax |
||
2886 | mov eax, [edi+20-2] |
||
2887 | mov ax, [edi+26] |
||
2888 | xchg eax, [esp] |
||
2889 | ; delete folder entry |
||
2890 | mov byte [edi], 0xE5 |
||
2891 | ; delete LFN (if present) |
||
2892 | .lfndel: |
||
2893 | cmp edi, buffer |
||
2894 | ja @f |
||
2895 | cmp [longname_sec2], 0 |
||
2896 | jz .lfndone |
||
2897 | push [longname_sec2] |
||
2898 | push [longname_sec1] |
||
2899 | pop [longname_sec2] |
||
2900 | and [longname_sec1], 0 |
||
2901 | push ebx |
||
2902 | mov ebx, buffer |
||
2903 | call hd_write |
||
2904 | mov eax, [esp+4] |
||
2905 | call hd_read |
||
2906 | pop ebx |
||
2907 | pop eax |
||
2908 | mov edi, buffer+0x200 |
||
2909 | @@: |
||
2910 | sub edi, 0x20 |
||
2911 | cmp byte [edi], 0xE5 |
||
2912 | jz .lfndone |
||
2913 | cmp byte [edi+11], 0xF |
||
2914 | jnz .lfndone |
||
2915 | mov byte [edi], 0xE5 |
||
2916 | jmp .lfndel |
||
2917 | .lfndone: |
||
2918 | push ebx |
||
2919 | mov ebx, buffer |
||
2920 | call hd_write |
||
2921 | pop ebx |
||
2922 | ; delete FAT chain |
||
2923 | pop eax |
||
2924 | call clear_cluster_chain |
||
2925 | call update_disk |
||
2926 | pop edi |
||
2927 | xor eax, eax |
||
2928 | cmp [hd_error], 0 |
||
2929 | jz @f |
||
2930 | mov al, 11 |
||
2931 | @@: |
||
2932 | ret |
||
2933 | |||
1379 | turbanoff | 2934 | ; \end{diamond}=>=>>> |