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1 | $Revision: 521 $ |
- | |
2 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
3 | ;; ;; |
2 | ;; ;; |
4 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
5 | ;; Distributed under terms of the GNU General Public License ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
6 | ;; ;; |
5 | ;; ;; |
7 | ;; FAT32.INC ;; |
6 | ;; FAT32.INC ;; |
8 | ;; ;; |
7 | ;; ;; |
9 | ;; FAT16/32 functions for KolibriOS ;; |
8 | ;; FAT16/32 functions for KolibriOS ;; |
10 | ;; ;; |
9 | ;; ;; |
11 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
10 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
12 | ;; ;; |
11 | ;; ;; |
13 | ;; See file COPYING for details ;; |
12 | ;; See file COPYING for details ;; |
14 | ;; 04.02.2007 LFN create folder - diamond ;; |
13 | ;; 04.02.2007 LFN create folder - diamond ;; |
15 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
14 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
16 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
15 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
17 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
16 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
18 | ;; 23.06.2006 LFN start application - diamond ;; |
17 | ;; 23.06.2006 LFN start application - diamond ;; |
19 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
18 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
20 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
19 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
21 | ;; 04.05.2006 LFN read folder - diamond ;; |
20 | ;; 04.05.2006 LFN read folder - diamond ;; |
22 | ;; 29.04.2006 Elimination of hangup after the ;; |
21 | ;; 29.04.2006 Elimination of hangup after the ;; |
23 | ;; expiration hd_wait_timeout - Mario79 ;; |
22 | ;; expiration hd_wait_timeout - Mario79 ;; |
24 | ;; 23.04.2006 LFN read file - diamond ;; |
23 | ;; 23.04.2006 LFN read file - diamond ;; |
25 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
24 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
26 | ;; to MBR, see file part_set.inc - Mario79 ;; |
25 | ;; to MBR, see file part_set.inc - Mario79 ;; |
27 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
26 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
28 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
27 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
29 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
28 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
30 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
29 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
31 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
30 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
32 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
31 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
33 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
32 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
34 | ;; 08.11.2004 rename - ATV ;; |
33 | ;; 08.11.2004 rename - ATV ;; |
35 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
34 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
36 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
35 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
37 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
36 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
38 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
37 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
39 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
38 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
40 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
39 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
41 | ;; 30.3.2004 Error parameters at function return - VT ;; |
40 | ;; 30.3.2004 Error parameters at function return - VT ;; |
42 | ;; 01.5.2002 Bugfix in device write - VT ;; |
41 | ;; 01.5.2002 Bugfix in device write - VT ;; |
43 | ;; 20.5.2002 Hd status check - VT ;; |
42 | ;; 20.5.2002 Hd status check - VT ;; |
44 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
43 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
45 | ;; ;; |
44 | ;; ;; |
46 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
45 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
- | 46 | ||
- | 47 | $Revision: 593 $ |
|
- | 48 | ||
47 | 49 | ||
48 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
50 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
49 | 51 | ||
50 | ERROR_SUCCESS = 0 |
52 | ERROR_SUCCESS = 0 |
51 | ERROR_DISK_BASE = 1 |
53 | ERROR_DISK_BASE = 1 |
52 | ERROR_UNSUPPORTED_FS = 2 |
54 | ERROR_UNSUPPORTED_FS = 2 |
53 | ERROR_UNKNOWN_FS = 3 |
55 | ERROR_UNKNOWN_FS = 3 |
54 | ERROR_PARTITION = 4 |
56 | ERROR_PARTITION = 4 |
55 | ERROR_FILE_NOT_FOUND = 5 |
57 | ERROR_FILE_NOT_FOUND = 5 |
56 | ERROR_END_OF_FILE = 6 |
58 | ERROR_END_OF_FILE = 6 |
57 | ERROR_MEMORY_POINTER = 7 |
59 | ERROR_MEMORY_POINTER = 7 |
58 | ERROR_DISK_FULL = 8 |
60 | ERROR_DISK_FULL = 8 |
59 | ERROR_FAT_TABLE = 9 |
61 | ERROR_FAT_TABLE = 9 |
60 | ERROR_ACCESS_DENIED = 10 |
62 | ERROR_ACCESS_DENIED = 10 |
61 | 63 | ||
62 | PUSHAD_EAX equ [esp+28] |
64 | PUSHAD_EAX equ [esp+28] |
63 | PUSHAD_ECX equ [esp+24] |
65 | PUSHAD_ECX equ [esp+24] |
64 | PUSHAD_EDX equ [esp+20] |
66 | PUSHAD_EDX equ [esp+20] |
65 | PUSHAD_EBX equ [esp+16] |
67 | PUSHAD_EBX equ [esp+16] |
66 | PUSHAD_EBP equ [esp+8] |
68 | PUSHAD_EBP equ [esp+8] |
67 | PUSHAD_ESI equ [esp+4] |
69 | PUSHAD_ESI equ [esp+4] |
68 | PUSHAD_EDI equ [esp+0] |
70 | PUSHAD_EDI equ [esp+0] |
69 | 71 | ||
70 | uglobal |
72 | uglobal |
71 | align 4 |
73 | align 4 |
72 | partition_count dd 0 ; partitions found by set_FAT32_variables |
74 | partition_count dd 0 ; partitions found by set_FAT32_variables |
73 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
75 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
74 | longname_sec2 dd 0 ; directory sectors for delete long filename |
76 | longname_sec2 dd 0 ; directory sectors for delete long filename |
75 | 77 | ||
76 | hd_error dd 0 ; set by wait_for_sector_buffer |
78 | hd_error dd 0 ; set by wait_for_sector_buffer |
77 | hd_setup dd 0 |
79 | hd_setup dd 0 |
78 | hd_wait_timeout dd 0 |
80 | hd_wait_timeout dd 0 |
79 | 81 | ||
80 | cluster_tmp dd 0 ; used by analyze_directory |
82 | cluster_tmp dd 0 ; used by analyze_directory |
81 | ; and analyze_directory_to_write |
83 | ; and analyze_directory_to_write |
82 | 84 | ||
83 | file_size dd 0 ; used by file_read |
85 | file_size dd 0 ; used by file_read |
84 | 86 | ||
85 | cache_search_start dd 0 ; used by find_empty_slot |
87 | cache_search_start dd 0 ; used by find_empty_slot |
86 | endg |
88 | endg |
87 | 89 | ||
88 | iglobal |
90 | iglobal |
89 | fat_in_cache dd -1 |
91 | fat_in_cache dd -1 |
90 | endg |
92 | endg |
91 | 93 | ||
92 | uglobal |
94 | uglobal |
93 | align 4 |
95 | align 4 |
94 | fat_cache: times 512 db 0 |
96 | fat_cache: times 512 db 0 |
95 | Sector512: ; label for dev_hdcd.inc |
97 | Sector512: ; label for dev_hdcd.inc |
96 | buffer: times 512 db 0 |
98 | buffer: times 512 db 0 |
97 | fsinfo_buffer: times 512 db 0 |
99 | fsinfo_buffer: times 512 db 0 |
98 | endg |
100 | endg |
99 | 101 | ||
100 | uglobal |
102 | uglobal |
101 | fat16_root db 0 ; flag for fat16 rootdir |
103 | fat16_root db 0 ; flag for fat16 rootdir |
102 | fat_change db 0 ; 1=fat has changed |
104 | fat_change db 0 ; 1=fat has changed |
103 | endg |
105 | endg |
104 | 106 | ||
105 | reserve_hd1: |
107 | reserve_hd1: |
106 | 108 | ||
107 | cli |
109 | cli |
108 | cmp [hd1_status],0 |
110 | cmp [hd1_status],0 |
109 | je reserve_ok1 |
111 | je reserve_ok1 |
110 | 112 | ||
111 | sti |
113 | sti |
112 | call change_task |
114 | call change_task |
113 | jmp reserve_hd1 |
115 | jmp reserve_hd1 |
114 | 116 | ||
115 | reserve_ok1: |
117 | reserve_ok1: |
116 | 118 | ||
117 | push eax |
119 | push eax |
118 | mov eax,[CURRENT_TASK] |
120 | mov eax,[CURRENT_TASK] |
119 | shl eax,5 |
121 | shl eax,5 |
120 | mov eax,[eax+CURRENT_TASK+TASKDATA.pid] |
122 | mov eax,[eax+CURRENT_TASK+TASKDATA.pid] |
121 | mov [hd1_status],eax |
123 | mov [hd1_status],eax |
122 | pop eax |
124 | pop eax |
123 | sti |
125 | sti |
124 | ret |
126 | ret |
125 | ;******************************************** |
127 | ;******************************************** |
126 | 128 | ||
127 | uglobal |
129 | uglobal |
128 | hd_in_cache db ? |
130 | hd_in_cache db ? |
129 | endg |
131 | endg |
130 | 132 | ||
131 | reserve_hd_channel: |
133 | reserve_hd_channel: |
132 | cmp [hdbase], 0x1F0 |
134 | cmp [hdbase], 0x1F0 |
133 | jne .IDE_Channel_2 |
135 | jne .IDE_Channel_2 |
134 | .IDE_Channel_1: |
136 | .IDE_Channel_1: |
135 | cli |
137 | cli |
136 | cmp [IDE_Channel_1],0 |
138 | cmp [IDE_Channel_1],0 |
137 | je .reserve_ok_1 |
139 | je .reserve_ok_1 |
138 | sti |
140 | sti |
139 | call change_task |
141 | call change_task |
140 | jmp .IDE_Channel_1 |
142 | jmp .IDE_Channel_1 |
141 | .IDE_Channel_2: |
143 | .IDE_Channel_2: |
142 | cli |
144 | cli |
143 | cmp [IDE_Channel_2],0 |
145 | cmp [IDE_Channel_2],0 |
144 | je .reserve_ok_2 |
146 | je .reserve_ok_2 |
145 | sti |
147 | sti |
146 | call change_task |
148 | call change_task |
147 | jmp .IDE_Channel_2 |
149 | jmp .IDE_Channel_2 |
148 | .reserve_ok_1: |
150 | .reserve_ok_1: |
149 | mov [IDE_Channel_1], 1 |
151 | mov [IDE_Channel_1], 1 |
150 | push eax |
152 | push eax |
151 | mov al, 1 |
153 | mov al, 1 |
152 | jmp @f |
154 | jmp @f |
153 | .reserve_ok_2: |
155 | .reserve_ok_2: |
154 | mov [IDE_Channel_2], 1 |
156 | mov [IDE_Channel_2], 1 |
155 | push eax |
157 | push eax |
156 | mov al, 3 |
158 | mov al, 3 |
157 | @@: |
159 | @@: |
158 | cmp [hdid], 1 |
160 | cmp [hdid], 1 |
159 | sbb al, -1 |
161 | sbb al, -1 |
160 | cmp al, [hd_in_cache] |
162 | cmp al, [hd_in_cache] |
161 | jz @f |
163 | jz @f |
162 | mov [hd_in_cache], al |
164 | mov [hd_in_cache], al |
163 | call clear_hd_cache |
165 | call clear_hd_cache |
164 | @@: |
166 | @@: |
165 | pop eax |
167 | pop eax |
166 | ret |
168 | ret |
167 | 169 | ||
168 | free_hd_channel: |
170 | free_hd_channel: |
169 | cmp [hdbase], 0x1F0 |
171 | cmp [hdbase], 0x1F0 |
170 | jne .IDE_Channel_2 |
172 | jne .IDE_Channel_2 |
171 | .IDE_Channel_1: |
173 | .IDE_Channel_1: |
172 | mov [IDE_Channel_1],0 |
174 | mov [IDE_Channel_1],0 |
173 | ret |
175 | ret |
174 | .IDE_Channel_2: |
176 | .IDE_Channel_2: |
175 | mov [IDE_Channel_2],0 |
177 | mov [IDE_Channel_2],0 |
176 | ret |
178 | ret |
177 | ;******************************************** |
179 | ;******************************************** |
178 | problem_partition db 0 ; used for partitions search |
180 | problem_partition db 0 ; used for partitions search |
179 | 181 | ||
180 | include 'part_set.inc' |
182 | include 'part_set.inc' |
181 | 183 | ||
182 | set_FAT: |
184 | set_FAT: |
183 | ;-------------------------------- |
185 | ;-------------------------------- |
184 | ; input : EAX = cluster |
186 | ; input : EAX = cluster |
185 | ; EDX = value to save |
187 | ; EDX = value to save |
186 | ; output : EDX = old value |
188 | ; output : EDX = old value |
187 | ;-------------------------------- |
189 | ;-------------------------------- |
188 | push eax ebx esi |
190 | push eax ebx esi |
189 | 191 | ||
190 | cmp eax,2 |
192 | cmp eax,2 |
191 | jb sfc_error |
193 | jb sfc_error |
192 | cmp eax,[LAST_CLUSTER] |
194 | cmp eax,[LAST_CLUSTER] |
193 | ja sfc_error |
195 | ja sfc_error |
194 | cmp [fs_type],16 |
196 | cmp [fs_type],16 |
195 | je sfc_1 |
197 | je sfc_1 |
196 | add eax,eax |
198 | add eax,eax |
197 | sfc_1: |
199 | sfc_1: |
198 | add eax,eax |
200 | add eax,eax |
199 | mov esi,511 |
201 | mov esi,511 |
200 | and esi,eax ; esi = position in fat sector |
202 | and esi,eax ; esi = position in fat sector |
201 | shr eax,9 ; eax = fat sector |
203 | shr eax,9 ; eax = fat sector |
202 | add eax,[FAT_START] |
204 | add eax,[FAT_START] |
203 | mov ebx,fat_cache |
205 | mov ebx,fat_cache |
204 | 206 | ||
205 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
207 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
206 | je sfc_in_cache ; yes |
208 | je sfc_in_cache ; yes |
207 | 209 | ||
208 | cmp [fat_change],0 ; is fat changed? |
210 | cmp [fat_change],0 ; is fat changed? |
209 | je sfc_no_change ; no |
211 | je sfc_no_change ; no |
210 | call write_fat_sector ; yes. write it into disk |
212 | call write_fat_sector ; yes. write it into disk |
211 | cmp [hd_error],0 |
213 | cmp [hd_error],0 |
212 | jne sfc_error |
214 | jne sfc_error |
213 | 215 | ||
214 | sfc_no_change: |
216 | sfc_no_change: |
215 | mov [fat_in_cache],eax ; save fat sector |
217 | mov [fat_in_cache],eax ; save fat sector |
216 | call hd_read |
218 | call hd_read |
217 | cmp [hd_error],0 |
219 | cmp [hd_error],0 |
218 | jne sfc_error |
220 | jne sfc_error |
219 | 221 | ||
220 | 222 | ||
221 | sfc_in_cache: |
223 | sfc_in_cache: |
222 | cmp [fs_type],16 |
224 | cmp [fs_type],16 |
223 | jne sfc_test32 |
225 | jne sfc_test32 |
224 | 226 | ||
225 | sfc_set16: |
227 | sfc_set16: |
226 | xchg [ebx+esi],dx ; save new value and get old value |
228 | xchg [ebx+esi],dx ; save new value and get old value |
227 | jmp sfc_write |
229 | jmp sfc_write |
228 | 230 | ||
229 | sfc_test32: |
231 | sfc_test32: |
230 | mov eax,[fatMASK] |
232 | mov eax,[fatMASK] |
231 | 233 | ||
232 | sfc_set32: |
234 | sfc_set32: |
233 | and edx,eax |
235 | and edx,eax |
234 | xor eax,-1 ; mask for high bits |
236 | xor eax,-1 ; mask for high bits |
235 | and eax,[ebx+esi] ; get high 4 bits |
237 | and eax,[ebx+esi] ; get high 4 bits |
236 | or eax,edx |
238 | or eax,edx |
237 | mov edx,[ebx+esi] ; get old value |
239 | mov edx,[ebx+esi] ; get old value |
238 | mov [ebx+esi],eax ; save new value |
240 | mov [ebx+esi],eax ; save new value |
239 | 241 | ||
240 | sfc_write: |
242 | sfc_write: |
241 | mov [fat_change],1 ; fat has changed |
243 | mov [fat_change],1 ; fat has changed |
242 | 244 | ||
243 | sfc_nonzero: |
245 | sfc_nonzero: |
244 | and edx,[fatMASK] |
246 | and edx,[fatMASK] |
245 | 247 | ||
246 | sfc_error: |
248 | sfc_error: |
247 | pop esi ebx eax |
249 | pop esi ebx eax |
248 | ret |
250 | ret |
249 | 251 | ||
250 | 252 | ||
251 | get_FAT: |
253 | get_FAT: |
252 | ;-------------------------------- |
254 | ;-------------------------------- |
253 | ; input : EAX = cluster |
255 | ; input : EAX = cluster |
254 | ; output : EAX = next cluster |
256 | ; output : EAX = next cluster |
255 | ;-------------------------------- |
257 | ;-------------------------------- |
256 | push ebx esi |
258 | push ebx esi |
257 | 259 | ||
258 | cmp [fs_type],16 |
260 | cmp [fs_type],16 |
259 | je gfc_1 |
261 | je gfc_1 |
260 | add eax,eax |
262 | add eax,eax |
261 | gfc_1: |
263 | gfc_1: |
262 | add eax,eax |
264 | add eax,eax |
263 | mov esi,511 |
265 | mov esi,511 |
264 | and esi,eax ; esi = position in fat sector |
266 | and esi,eax ; esi = position in fat sector |
265 | shr eax,9 ; eax = fat sector |
267 | shr eax,9 ; eax = fat sector |
266 | add eax,[FAT_START] |
268 | add eax,[FAT_START] |
267 | mov ebx,fat_cache |
269 | mov ebx,fat_cache |
268 | 270 | ||
269 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
271 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
270 | je gfc_in_cache |
272 | je gfc_in_cache |
271 | 273 | ||
272 | cmp [fat_change],0 ; is fat changed? |
274 | cmp [fat_change],0 ; is fat changed? |
273 | je gfc_no_change ; no |
275 | je gfc_no_change ; no |
274 | call write_fat_sector ; yes. write it into disk |
276 | call write_fat_sector ; yes. write it into disk |
275 | cmp [hd_error],0 |
277 | cmp [hd_error],0 |
276 | jne hd_error_01 |
278 | jne hd_error_01 |
277 | 279 | ||
278 | gfc_no_change: |
280 | gfc_no_change: |
279 | mov [fat_in_cache],eax |
281 | mov [fat_in_cache],eax |
280 | call hd_read |
282 | call hd_read |
281 | cmp [hd_error],0 |
283 | cmp [hd_error],0 |
282 | jne hd_error_01 |
284 | jne hd_error_01 |
283 | 285 | ||
284 | gfc_in_cache: |
286 | gfc_in_cache: |
285 | mov eax,[ebx+esi] |
287 | mov eax,[ebx+esi] |
286 | and eax,[fatMASK] |
288 | and eax,[fatMASK] |
287 | hd_error_01: |
289 | hd_error_01: |
288 | pop esi ebx |
290 | pop esi ebx |
289 | ret |
291 | ret |
290 | 292 | ||
291 | 293 | ||
292 | get_free_FAT: |
294 | get_free_FAT: |
293 | ;----------------------------------------------------------- |
295 | ;----------------------------------------------------------- |
294 | ; input : EAX = # cluster for start the searching |
296 | ; input : EAX = # cluster for start the searching |
295 | ; output : if CARRY=0 EAX = # first cluster found free |
297 | ; output : if CARRY=0 EAX = # first cluster found free |
296 | ; if CARRY=1 disk full |
298 | ; if CARRY=1 disk full |
297 | ; Note : for more speed need to use fat_cache directly |
299 | ; Note : for more speed need to use fat_cache directly |
298 | ;----------------------------------------------------------- |
300 | ;----------------------------------------------------------- |
299 | push ecx |
301 | push ecx |
300 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
302 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
301 | sub ecx,2 |
303 | sub ecx,2 |
302 | 304 | ||
303 | gff_test: |
305 | gff_test: |
304 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
306 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
305 | jbe gff_in_range |
307 | jbe gff_in_range |
306 | mov eax,2 |
308 | mov eax,2 |
307 | 309 | ||
308 | gff_in_range: |
310 | gff_in_range: |
309 | push eax |
311 | push eax |
310 | call get_FAT ; get cluster state |
312 | call get_FAT ; get cluster state |
311 | cmp [hd_error],0 |
313 | cmp [hd_error],0 |
312 | jne gff_not_found_1 |
314 | jne gff_not_found_1 |
313 | 315 | ||
314 | test eax,eax ; is it free? |
316 | test eax,eax ; is it free? |
315 | pop eax |
317 | pop eax |
316 | je gff_found ; yes |
318 | je gff_found ; yes |
317 | inc eax ; next cluster |
319 | inc eax ; next cluster |
318 | dec ecx ; is all checked? |
320 | dec ecx ; is all checked? |
319 | jns gff_test ; no |
321 | jns gff_test ; no |
320 | 322 | ||
321 | gff_not_found_1: |
323 | gff_not_found_1: |
322 | add esp,4 |
324 | add esp,4 |
323 | gff_not_found: |
325 | gff_not_found: |
324 | pop ecx ; yes. disk is full |
326 | pop ecx ; yes. disk is full |
325 | stc |
327 | stc |
326 | ret |
328 | ret |
327 | 329 | ||
328 | gff_found: |
330 | gff_found: |
329 | pop ecx |
331 | pop ecx |
330 | clc |
332 | clc |
331 | ret |
333 | ret |
332 | 334 | ||
333 | 335 | ||
334 | write_fat_sector: |
336 | write_fat_sector: |
335 | ;----------------------------------------------------------- |
337 | ;----------------------------------------------------------- |
336 | ; write changed fat to disk |
338 | ; write changed fat to disk |
337 | ;----------------------------------------------------------- |
339 | ;----------------------------------------------------------- |
338 | push eax ebx ecx |
340 | push eax ebx ecx |
339 | 341 | ||
340 | mov [fat_change],0 |
342 | mov [fat_change],0 |
341 | mov eax,[fat_in_cache] |
343 | mov eax,[fat_in_cache] |
342 | cmp eax,-1 |
344 | cmp eax,-1 |
343 | jz write_fat_not_used |
345 | jz write_fat_not_used |
344 | mov ebx,fat_cache |
346 | mov ebx,fat_cache |
345 | mov ecx,[NUMBER_OF_FATS] |
347 | mov ecx,[NUMBER_OF_FATS] |
346 | 348 | ||
347 | write_next_fat: |
349 | write_next_fat: |
348 | call hd_write |
350 | call hd_write |
349 | cmp [hd_error],0 |
351 | cmp [hd_error],0 |
350 | jne write_fat_not_used |
352 | jne write_fat_not_used |
351 | 353 | ||
352 | add eax,[SECTORS_PER_FAT] |
354 | add eax,[SECTORS_PER_FAT] |
353 | dec ecx |
355 | dec ecx |
354 | jnz write_next_fat |
356 | jnz write_next_fat |
355 | 357 | ||
356 | write_fat_not_used: |
358 | write_fat_not_used: |
357 | pop ecx ebx eax |
359 | pop ecx ebx eax |
358 | ret |
360 | ret |
359 | 361 | ||
360 | 362 | ||
361 | analyze_directory: |
363 | analyze_directory: |
362 | ;----------------------------------------------------------- |
364 | ;----------------------------------------------------------- |
363 | ; input : EAX = first cluster of the directory |
365 | ; input : EAX = first cluster of the directory |
364 | ; EBX = pointer to filename |
366 | ; EBX = pointer to filename |
365 | ; output : IF CARRY=0 EAX = sector where th file is found |
367 | ; output : IF CARRY=0 EAX = sector where th file is found |
366 | ; EBX = pointer in buffer |
368 | ; EBX = pointer in buffer |
367 | ; [buffer .. buffer+511] |
369 | ; [buffer .. buffer+511] |
368 | ; ECX,EDX,ESI,EDI not changed |
370 | ; ECX,EDX,ESI,EDI not changed |
369 | ; IF CARRY=1 filename not found |
371 | ; IF CARRY=1 filename not found |
370 | ; Note : if cluster=0 it's changed to read rootdir |
372 | ; Note : if cluster=0 it's changed to read rootdir |
371 | ; save 2 previous directory sectors in longname_sec |
373 | ; save 2 previous directory sectors in longname_sec |
372 | ;----------------------------------------------------------- |
374 | ;----------------------------------------------------------- |
373 | push ecx edx esi edi ebx ; ebx = [esp+0] |
375 | push ecx edx esi edi ebx ; ebx = [esp+0] |
374 | mov [longname_sec1],0 |
376 | mov [longname_sec1],0 |
375 | mov [longname_sec2],0 |
377 | mov [longname_sec2],0 |
376 | 378 | ||
377 | adr_new_cluster: |
379 | adr_new_cluster: |
378 | mov [cluster_tmp],eax |
380 | mov [cluster_tmp],eax |
379 | mov [fat16_root],0 |
381 | mov [fat16_root],0 |
380 | cmp eax,[LAST_CLUSTER] |
382 | cmp eax,[LAST_CLUSTER] |
381 | ja adr_not_found ; too big cluster number, something is wrong |
383 | ja adr_not_found ; too big cluster number, something is wrong |
382 | cmp eax,2 |
384 | cmp eax,2 |
383 | jnb adr_data_cluster |
385 | jnb adr_data_cluster |
384 | 386 | ||
385 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
387 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
386 | cmp [fs_type],16 |
388 | cmp [fs_type],16 |
387 | jne adr_data_cluster |
389 | jne adr_data_cluster |
388 | mov eax,[ROOT_START] |
390 | mov eax,[ROOT_START] |
389 | mov edx,[ROOT_SECTORS] |
391 | mov edx,[ROOT_SECTORS] |
390 | mov [fat16_root],1 ; flag for fat16 rootdir |
392 | mov [fat16_root],1 ; flag for fat16 rootdir |
391 | jmp adr_new_sector |
393 | jmp adr_new_sector |
392 | 394 | ||
393 | adr_data_cluster: |
395 | adr_data_cluster: |
394 | sub eax,2 |
396 | sub eax,2 |
395 | mov edx,[SECTORS_PER_CLUSTER] |
397 | mov edx,[SECTORS_PER_CLUSTER] |
396 | imul eax,edx |
398 | imul eax,edx |
397 | add eax,[DATA_START] |
399 | add eax,[DATA_START] |
398 | 400 | ||
399 | adr_new_sector: |
401 | adr_new_sector: |
400 | mov ebx,buffer |
402 | mov ebx,buffer |
401 | call hd_read |
403 | call hd_read |
402 | cmp [hd_error],0 |
404 | cmp [hd_error],0 |
403 | jne adr_not_found |
405 | jne adr_not_found |
404 | 406 | ||
405 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
407 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
406 | 408 | ||
407 | adr_analyze: |
409 | adr_analyze: |
408 | mov edi,[ebx+11] ; file attribute |
410 | mov edi,[ebx+11] ; file attribute |
409 | and edi,0xf |
411 | and edi,0xf |
410 | cmp edi,0xf |
412 | cmp edi,0xf |
411 | je adr_long_filename |
413 | je adr_long_filename |
412 | test edi,0x8 ; skip over volume label |
414 | test edi,0x8 ; skip over volume label |
413 | jne adr_long_filename ; Note: label can be same name as file/dir |
415 | jne adr_long_filename ; Note: label can be same name as file/dir |
414 | 416 | ||
415 | mov esi,[esp+0] ; filename need to be uppercase |
417 | mov esi,[esp+0] ; filename need to be uppercase |
416 | mov edi,ebx |
418 | mov edi,ebx |
417 | push ecx |
419 | push ecx |
418 | mov ecx,11 |
420 | mov ecx,11 |
419 | cld |
421 | cld |
420 | rep cmpsb ; compare 8+3 filename |
422 | rep cmpsb ; compare 8+3 filename |
421 | pop ecx |
423 | pop ecx |
422 | je adr_found |
424 | je adr_found |
423 | 425 | ||
424 | adr_long_filename: |
426 | adr_long_filename: |
425 | add ebx,32 ; position of next dir entry |
427 | add ebx,32 ; position of next dir entry |
426 | dec ecx |
428 | dec ecx |
427 | jnz adr_analyze |
429 | jnz adr_analyze |
428 | 430 | ||
429 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
431 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
430 | mov [longname_sec1],eax ; for delete long filename |
432 | mov [longname_sec1],eax ; for delete long filename |
431 | mov [longname_sec2],ecx |
433 | mov [longname_sec2],ecx |
432 | inc eax ; next sector |
434 | inc eax ; next sector |
433 | dec edx |
435 | dec edx |
434 | jne adr_new_sector |
436 | jne adr_new_sector |
435 | cmp [fat16_root],1 ; end of fat16 rootdir |
437 | cmp [fat16_root],1 ; end of fat16 rootdir |
436 | je adr_not_found |
438 | je adr_not_found |
437 | 439 | ||
438 | adr_next_cluster: |
440 | adr_next_cluster: |
439 | mov eax,[cluster_tmp] |
441 | mov eax,[cluster_tmp] |
440 | call get_FAT ; get next cluster |
442 | call get_FAT ; get next cluster |
441 | cmp [hd_error],0 |
443 | cmp [hd_error],0 |
442 | jne adr_not_found |
444 | jne adr_not_found |
443 | 445 | ||
444 | cmp eax,2 ; incorrect fat chain? |
446 | cmp eax,2 ; incorrect fat chain? |
445 | jb adr_not_found ; yes |
447 | jb adr_not_found ; yes |
446 | cmp eax,[fatRESERVED] ; is it end of directory? |
448 | cmp eax,[fatRESERVED] ; is it end of directory? |
447 | jb adr_new_cluster ; no. analyse it |
449 | jb adr_new_cluster ; no. analyse it |
448 | 450 | ||
449 | adr_not_found: |
451 | adr_not_found: |
450 | pop edi edi esi edx ecx ; first edi will remove ebx |
452 | pop edi edi esi edx ecx ; first edi will remove ebx |
451 | stc ; file not found |
453 | stc ; file not found |
452 | ret |
454 | ret |
453 | 455 | ||
454 | adr_found: |
456 | adr_found: |
455 | pop edi edi esi edx ecx ; first edi will remove ebx |
457 | pop edi edi esi edx ecx ; first edi will remove ebx |
456 | clc ; file found |
458 | clc ; file found |
457 | ret |
459 | ret |
458 | 460 | ||
459 | 461 | ||
460 | get_data_cluster: |
462 | get_data_cluster: |
461 | ;----------------------------------------------------------- |
463 | ;----------------------------------------------------------- |
462 | ; input : EAX = cluster |
464 | ; input : EAX = cluster |
463 | ; EBX = pointer to buffer |
465 | ; EBX = pointer to buffer |
464 | ; EDX = # blocks to read in buffer |
466 | ; EDX = # blocks to read in buffer |
465 | ; ESI = # blocks to skip over |
467 | ; ESI = # blocks to skip over |
466 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
468 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
467 | ; if CARRY=1 cluster out of range |
469 | ; if CARRY=1 cluster out of range |
468 | ; Note : if cluster=0 it's changed to read rootdir |
470 | ; Note : if cluster=0 it's changed to read rootdir |
469 | ;----------------------------------------------------------- |
471 | ;----------------------------------------------------------- |
470 | push eax ecx |
472 | push eax ecx |
471 | 473 | ||
472 | mov [fat16_root],0 |
474 | mov [fat16_root],0 |
473 | cmp eax,[LAST_CLUSTER] |
475 | cmp eax,[LAST_CLUSTER] |
474 | ja gdc_error ; too big cluster number, something is wrong |
476 | ja gdc_error ; too big cluster number, something is wrong |
475 | cmp eax,2 |
477 | cmp eax,2 |
476 | jnb gdc_cluster |
478 | jnb gdc_cluster |
477 | 479 | ||
478 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
480 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
479 | cmp [fs_type],16 |
481 | cmp [fs_type],16 |
480 | jne gdc_cluster |
482 | jne gdc_cluster |
481 | mov eax,[ROOT_START] |
483 | mov eax,[ROOT_START] |
482 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
484 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
483 | mov [fat16_root],1 ; flag for fat16 rootdir |
485 | mov [fat16_root],1 ; flag for fat16 rootdir |
484 | jmp gdc_read |
486 | jmp gdc_read |
485 | 487 | ||
486 | gdc_cluster: |
488 | gdc_cluster: |
487 | sub eax,2 |
489 | sub eax,2 |
488 | mov ecx,[SECTORS_PER_CLUSTER] |
490 | mov ecx,[SECTORS_PER_CLUSTER] |
489 | imul eax,ecx |
491 | imul eax,ecx |
490 | add eax,[DATA_START] |
492 | add eax,[DATA_START] |
491 | 493 | ||
492 | gdc_read: |
494 | gdc_read: |
493 | test esi,esi ; first wanted block |
495 | test esi,esi ; first wanted block |
494 | je gdcl1 ; yes, skip count is 0 |
496 | je gdcl1 ; yes, skip count is 0 |
495 | dec esi |
497 | dec esi |
496 | jmp gdcl2 |
498 | jmp gdcl2 |
497 | 499 | ||
498 | gdcl1: |
500 | gdcl1: |
499 | call hd_read |
501 | call hd_read |
500 | cmp [hd_error],0 |
502 | cmp [hd_error],0 |
501 | jne gdc_error |
503 | jne gdc_error |
502 | 504 | ||
503 | add ebx,512 ; update pointer |
505 | add ebx,512 ; update pointer |
504 | dec edx |
506 | dec edx |
505 | 507 | ||
506 | gdcl2: |
508 | gdcl2: |
507 | test edx,edx ; is all read? |
509 | test edx,edx ; is all read? |
508 | je out_of_read |
510 | je out_of_read |
509 | 511 | ||
510 | inc eax ; next sector |
512 | inc eax ; next sector |
511 | dec ecx |
513 | dec ecx |
512 | jnz gdc_read |
514 | jnz gdc_read |
513 | 515 | ||
514 | out_of_read: |
516 | out_of_read: |
515 | pop ecx eax |
517 | pop ecx eax |
516 | clc |
518 | clc |
517 | ret |
519 | ret |
518 | 520 | ||
519 | gdc_error: |
521 | gdc_error: |
520 | pop ecx eax |
522 | pop ecx eax |
521 | stc |
523 | stc |
522 | ret |
524 | ret |
523 | 525 | ||
524 | 526 | ||
525 | get_cluster_of_a_path: |
527 | get_cluster_of_a_path: |
526 | ;--------------------------------------------------------- |
528 | ;--------------------------------------------------------- |
527 | ; input : EBX = pointer to a path string |
529 | ; input : EBX = pointer to a path string |
528 | ; (example: the path "/files/data/document" become |
530 | ; (example: the path "/files/data/document" become |
529 | ; "files......data.......document...0" |
531 | ; "files......data.......document...0" |
530 | ; '.' = space char |
532 | ; '.' = space char |
531 | ; '0' = char(0) (ASCII=0) !!! ) |
533 | ; '0' = char(0) (ASCII=0) !!! ) |
532 | ; output : if (CARRY=1) -> ERROR in the PATH |
534 | ; output : if (CARRY=1) -> ERROR in the PATH |
533 | ; if (CARRY=0) -> EAX=cluster |
535 | ; if (CARRY=0) -> EAX=cluster |
534 | ;--------------------------------------------------------- |
536 | ;--------------------------------------------------------- |
535 | push ebx edx |
537 | push ebx edx |
536 | 538 | ||
537 | mov eax,[ROOT_CLUSTER] |
539 | mov eax,[ROOT_CLUSTER] |
538 | mov edx,ebx |
540 | mov edx,ebx |
539 | 541 | ||
540 | search_end_of_path: |
542 | search_end_of_path: |
541 | cmp byte [edx],0 |
543 | cmp byte [edx],0 |
542 | je found_end_of_path |
544 | je found_end_of_path |
543 | 545 | ||
544 | inc edx ; '/' |
546 | inc edx ; '/' |
545 | mov ebx,edx |
547 | mov ebx,edx |
546 | call analyze_directory |
548 | call analyze_directory |
547 | jc directory_not_found |
549 | jc directory_not_found |
548 | 550 | ||
549 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
551 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
550 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
552 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
551 | and eax,[fatMASK] |
553 | and eax,[fatMASK] |
552 | add edx,11 ; 8+3 (name+extension) |
554 | add edx,11 ; 8+3 (name+extension) |
553 | jmp search_end_of_path |
555 | jmp search_end_of_path |
554 | 556 | ||
555 | found_end_of_path: |
557 | found_end_of_path: |
556 | pop edx ebx |
558 | pop edx ebx |
557 | clc ; no errors |
559 | clc ; no errors |
558 | ret |
560 | ret |
559 | 561 | ||
560 | directory_not_found: |
562 | directory_not_found: |
561 | pop edx ebx |
563 | pop edx ebx |
562 | stc ; errors occour |
564 | stc ; errors occour |
563 | ret |
565 | ret |
564 | 566 | ||
565 | 567 | ||
566 | bcd2bin: |
568 | bcd2bin: |
567 | ;---------------------------------- |
569 | ;---------------------------------- |
568 | ; input : AL=BCD number (eg. 0x11) |
570 | ; input : AL=BCD number (eg. 0x11) |
569 | ; output : AH=0 |
571 | ; output : AH=0 |
570 | ; AL=decimal number (eg. 11) |
572 | ; AL=decimal number (eg. 11) |
571 | ;---------------------------------- |
573 | ;---------------------------------- |
572 | xor ah,ah |
574 | xor ah,ah |
573 | shl ax,4 |
575 | shl ax,4 |
574 | shr al,4 |
576 | shr al,4 |
575 | aad |
577 | aad |
576 | ret |
578 | ret |
577 | 579 | ||
578 | 580 | ||
579 | get_date_for_file: |
581 | get_date_for_file: |
580 | ;----------------------------------------------------- |
582 | ;----------------------------------------------------- |
581 | ; Get date from CMOS and pack day,month,year in AX |
583 | ; Get date from CMOS and pack day,month,year in AX |
582 | ; DATE bits 0..4 : day of month 0..31 |
584 | ; DATE bits 0..4 : day of month 0..31 |
583 | ; 5..8 : month of year 1..12 |
585 | ; 5..8 : month of year 1..12 |
584 | ; 9..15 : count of years from 1980 |
586 | ; 9..15 : count of years from 1980 |
585 | ;----------------------------------------------------- |
587 | ;----------------------------------------------------- |
586 | mov al,0x7 ;day |
588 | mov al,0x7 ;day |
587 | out 0x70,al |
589 | out 0x70,al |
588 | in al,0x71 |
590 | in al,0x71 |
589 | call bcd2bin |
591 | call bcd2bin |
590 | ror eax,5 |
592 | ror eax,5 |
591 | 593 | ||
592 | mov al,0x8 ;month |
594 | mov al,0x8 ;month |
593 | out 0x70,al |
595 | out 0x70,al |
594 | in al,0x71 |
596 | in al,0x71 |
595 | call bcd2bin |
597 | call bcd2bin |
596 | ror eax,4 |
598 | ror eax,4 |
597 | 599 | ||
598 | mov al,0x9 ;year |
600 | mov al,0x9 ;year |
599 | out 0x70,al |
601 | out 0x70,al |
600 | in al,0x71 |
602 | in al,0x71 |
601 | call bcd2bin |
603 | call bcd2bin |
602 | add ax,20 ;because CMOS return only the two last |
604 | add ax,20 ;because CMOS return only the two last |
603 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
605 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
604 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
606 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
605 | ret |
607 | ret |
606 | 608 | ||
607 | 609 | ||
608 | get_time_for_file: |
610 | get_time_for_file: |
609 | ;----------------------------------------------------- |
611 | ;----------------------------------------------------- |
610 | ; Get time from CMOS and pack hour,minute,second in AX |
612 | ; Get time from CMOS and pack hour,minute,second in AX |
611 | ; TIME bits 0..4 : second (the low bit is lost) |
613 | ; TIME bits 0..4 : second (the low bit is lost) |
612 | ; 5..10 : minute 0..59 |
614 | ; 5..10 : minute 0..59 |
613 | ; 11..15 : hour 0..23 |
615 | ; 11..15 : hour 0..23 |
614 | ;----------------------------------------------------- |
616 | ;----------------------------------------------------- |
615 | mov al,0x0 ;second |
617 | mov al,0x0 ;second |
616 | out 0x70,al |
618 | out 0x70,al |
617 | in al,0x71 |
619 | in al,0x71 |
618 | call bcd2bin |
620 | call bcd2bin |
619 | ror eax,6 |
621 | ror eax,6 |
620 | 622 | ||
621 | mov al,0x2 ;minute |
623 | mov al,0x2 ;minute |
622 | out 0x70,al |
624 | out 0x70,al |
623 | in al,0x71 |
625 | in al,0x71 |
624 | call bcd2bin |
626 | call bcd2bin |
625 | ror eax,6 |
627 | ror eax,6 |
626 | 628 | ||
627 | mov al,0x4 ;hour |
629 | mov al,0x4 ;hour |
628 | out 0x70,al |
630 | out 0x70,al |
629 | in al,0x71 |
631 | in al,0x71 |
630 | call bcd2bin |
632 | call bcd2bin |
631 | rol eax,11 |
633 | rol eax,11 |
632 | ret |
634 | ret |
633 | 635 | ||
634 | 636 | ||
635 | set_current_time_for_entry: |
637 | set_current_time_for_entry: |
636 | ;----------------------------------------------------- |
638 | ;----------------------------------------------------- |
637 | ; Set current time/date for file entry |
639 | ; Set current time/date for file entry |
638 | ; input : ebx = file entry pointer |
640 | ; input : ebx = file entry pointer |
639 | ;----------------------------------------------------- |
641 | ;----------------------------------------------------- |
640 | push eax |
642 | push eax |
641 | call get_time_for_file ; update files date/time |
643 | call get_time_for_file ; update files date/time |
642 | mov [ebx+22],ax |
644 | mov [ebx+22],ax |
643 | call get_date_for_file |
645 | call get_date_for_file |
644 | mov [ebx+24],ax |
646 | mov [ebx+24],ax |
645 | pop eax |
647 | pop eax |
646 | ret |
648 | ret |
647 | 649 | ||
648 | 650 | ||
649 | 651 | ||
650 | add_disk_free_space: |
652 | add_disk_free_space: |
651 | ;----------------------------------------------------- |
653 | ;----------------------------------------------------- |
652 | ; input : ecx = cluster count |
654 | ; input : ecx = cluster count |
653 | ; Note : negative = remove clusters from free space |
655 | ; Note : negative = remove clusters from free space |
654 | ; positive = add clusters to free space |
656 | ; positive = add clusters to free space |
655 | ;----------------------------------------------------- |
657 | ;----------------------------------------------------- |
656 | test ecx,ecx ; no change |
658 | test ecx,ecx ; no change |
657 | je add_dfs_no |
659 | je add_dfs_no |
658 | cmp [fs_type],32 ; free disk space only used by fat32 |
660 | cmp [fs_type],32 ; free disk space only used by fat32 |
659 | jne add_dfs_no |
661 | jne add_dfs_no |
660 | 662 | ||
661 | push eax ebx |
663 | push eax ebx |
662 | mov eax,[ADR_FSINFO] |
664 | mov eax,[ADR_FSINFO] |
663 | mov ebx,fsinfo_buffer |
665 | mov ebx,fsinfo_buffer |
664 | call hd_read |
666 | call hd_read |
665 | cmp [hd_error],0 |
667 | cmp [hd_error],0 |
666 | jne add_not_fs |
668 | jne add_not_fs |
667 | 669 | ||
668 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
670 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
669 | jne add_not_fs |
671 | jne add_not_fs |
670 | 672 | ||
671 | add [ebx+0x1e8],ecx |
673 | add [ebx+0x1e8],ecx |
672 | call hd_write |
674 | call hd_write |
673 | ; cmp [hd_error],0 |
675 | ; cmp [hd_error],0 |
674 | ; jne add_not_fs |
676 | ; jne add_not_fs |
675 | 677 | ||
676 | add_not_fs: |
678 | add_not_fs: |
677 | pop ebx eax |
679 | pop ebx eax |
678 | 680 | ||
679 | add_dfs_no: |
681 | add_dfs_no: |
680 | ret |
682 | ret |
681 | 683 | ||
682 | 684 | ||
683 | file_read: |
685 | file_read: |
684 | ;-------------------------------------------------------------------------- |
686 | ;-------------------------------------------------------------------------- |
685 | ; INPUT : user-register register-in-this meaning symbol-in-this |
687 | ; INPUT : user-register register-in-this meaning symbol-in-this |
686 | ; |
688 | ; |
687 | ; EAX EDI system call to write / |
689 | ; EAX EDI system call to write / |
688 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
690 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
689 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
691 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
690 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
692 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
691 | ; ESI EDX (PAR3) pointer to path PAR3 |
693 | ; ESI EDX (PAR3) pointer to path PAR3 |
692 | ; EDI ESI vt first 512 block to read |
694 | ; EDI ESI vt first 512 block to read |
693 | ; EDI if 0 - read root |
695 | ; EDI if 0 - read root |
694 | ; |
696 | ; |
695 | ; output : eax = 0 - ok |
697 | ; output : eax = 0 - ok |
696 | ; 3 - unknown FS |
698 | ; 3 - unknown FS |
697 | ; 5 - file not found |
699 | ; 5 - file not found |
698 | ; 6 - end of file |
700 | ; 6 - end of file |
699 | ; 9 - fat table corrupted |
701 | ; 9 - fat table corrupted |
700 | ; 10 - access denied |
702 | ; 10 - access denied |
701 | ; ebx = size of file/directory |
703 | ; ebx = size of file/directory |
702 | ;-------------------------------------------------------------------------- |
704 | ;-------------------------------------------------------------------------- |
703 | cmp [fs_type], 16 |
705 | cmp [fs_type], 16 |
704 | jz fat_ok_for_reading |
706 | jz fat_ok_for_reading |
705 | cmp [fs_type], 32 |
707 | cmp [fs_type], 32 |
706 | jz fat_ok_for_reading |
708 | jz fat_ok_for_reading |
707 | xor ebx,ebx |
709 | xor ebx,ebx |
708 | mov eax,ERROR_UNKNOWN_FS |
710 | mov eax,ERROR_UNKNOWN_FS |
709 | mov [hd1_status], ebx |
711 | mov [hd1_status], ebx |
710 | ret |
712 | ret |
711 | 713 | ||
712 | fat_ok_for_reading: |
714 | fat_ok_for_reading: |
713 | ; call reserve_hd1 |
715 | ; call reserve_hd1 |
714 | 716 | ||
715 | pushad |
717 | pushad |
716 | 718 | ||
717 | mov ebx,edx |
719 | mov ebx,edx |
718 | call get_cluster_of_a_path |
720 | call get_cluster_of_a_path |
719 | jc file_to_read_not_found |
721 | jc file_to_read_not_found |
720 | 722 | ||
721 | test edi,edi ; read rootdir |
723 | test edi,edi ; read rootdir |
722 | jne no_read_root |
724 | jne no_read_root |
723 | 725 | ||
724 | xor eax,eax |
726 | xor eax,eax |
725 | call get_dir_size ; return rootdir size |
727 | call get_dir_size ; return rootdir size |
726 | cmp [hd_error],0 |
728 | cmp [hd_error],0 |
727 | jne file_access_denied |
729 | jne file_access_denied |
728 | 730 | ||
729 | mov [file_size],eax |
731 | mov [file_size],eax |
730 | mov eax,[ROOT_CLUSTER] |
732 | mov eax,[ROOT_CLUSTER] |
731 | jmp file_read_start |
733 | jmp file_read_start |
732 | 734 | ||
733 | no_read_root: |
735 | no_read_root: |
734 | mov ebx,PUSHAD_EAX ; file name |
736 | mov ebx,PUSHAD_EAX ; file name |
735 | call analyze_directory |
737 | call analyze_directory |
736 | jc file_to_read_not_found |
738 | jc file_to_read_not_found |
737 | 739 | ||
738 | mov eax,[ebx+28] ; file size |
740 | mov eax,[ebx+28] ; file size |
739 | test byte [ebx+11],0x10 ; is it directory? |
741 | test byte [ebx+11],0x10 ; is it directory? |
740 | jz read_set_size ; no |
742 | jz read_set_size ; no |
741 | 743 | ||
742 | mov eax,[ebx+20-2] ; FAT entry |
744 | mov eax,[ebx+20-2] ; FAT entry |
743 | mov ax,[ebx+26] |
745 | mov ax,[ebx+26] |
744 | and eax,[fatMASK] |
746 | and eax,[fatMASK] |
745 | call get_dir_size |
747 | call get_dir_size |
746 | cmp [hd_error],0 |
748 | cmp [hd_error],0 |
747 | jne file_access_denied |
749 | jne file_access_denied |
748 | 750 | ||
749 | read_set_size: |
751 | read_set_size: |
750 | mov [file_size],eax |
752 | mov [file_size],eax |
751 | 753 | ||
752 | mov eax,[ebx+20-2] ; FAT entry |
754 | mov eax,[ebx+20-2] ; FAT entry |
753 | mov ax,[ebx+26] |
755 | mov ax,[ebx+26] |
754 | and eax,[fatMASK] |
756 | and eax,[fatMASK] |
755 | 757 | ||
756 | file_read_start: |
758 | file_read_start: |
757 | mov ebx,PUSHAD_ECX ; pointer to buffer |
759 | mov ebx,PUSHAD_ECX ; pointer to buffer |
758 | mov edx,PUSHAD_EBX ; file blocks to read |
760 | mov edx,PUSHAD_EBX ; file blocks to read |
759 | mov esi,PUSHAD_ESI ; first 512 block to read |
761 | mov esi,PUSHAD_ESI ; first 512 block to read |
760 | 762 | ||
761 | file_read_new_cluster: |
763 | file_read_new_cluster: |
762 | call get_data_cluster |
764 | call get_data_cluster |
763 | jc file_read_eof ; end of file or cluster out of range |
765 | jc file_read_eof ; end of file or cluster out of range |
764 | 766 | ||
765 | test edx,edx ; is all read? |
767 | test edx,edx ; is all read? |
766 | je file_read_OK ; yes |
768 | je file_read_OK ; yes |
767 | 769 | ||
768 | call get_FAT ; get next cluster |
770 | call get_FAT ; get next cluster |
769 | cmp [hd_error],0 |
771 | cmp [hd_error],0 |
770 | jne file_access_denied |
772 | jne file_access_denied |
771 | 773 | ||
772 | cmp eax,[fatRESERVED] ; end of file |
774 | cmp eax,[fatRESERVED] ; end of file |
773 | jnb file_read_eof |
775 | jnb file_read_eof |
774 | cmp eax,2 ; incorrect fat chain |
776 | cmp eax,2 ; incorrect fat chain |
775 | jnb file_read_new_cluster |
777 | jnb file_read_new_cluster |
776 | 778 | ||
777 | popad |
779 | popad |
778 | mov [hd1_status],0 |
780 | mov [hd1_status],0 |
779 | mov ebx,[file_size] |
781 | mov ebx,[file_size] |
780 | mov eax,ERROR_FAT_TABLE |
782 | mov eax,ERROR_FAT_TABLE |
781 | ret |
783 | ret |
782 | 784 | ||
783 | file_read_eof: |
785 | file_read_eof: |
784 | cmp [hd_error],0 |
786 | cmp [hd_error],0 |
785 | jne file_access_denied |
787 | jne file_access_denied |
786 | popad |
788 | popad |
787 | mov [hd1_status],0 |
789 | mov [hd1_status],0 |
788 | mov ebx,[file_size] |
790 | mov ebx,[file_size] |
789 | mov eax,ERROR_END_OF_FILE |
791 | mov eax,ERROR_END_OF_FILE |
790 | ret |
792 | ret |
791 | 793 | ||
792 | file_read_OK: |
794 | file_read_OK: |
793 | popad |
795 | popad |
794 | mov [hd1_status],0 |
796 | mov [hd1_status],0 |
795 | mov ebx,[file_size] |
797 | mov ebx,[file_size] |
796 | xor eax,eax |
798 | xor eax,eax |
797 | ret |
799 | ret |
798 | 800 | ||
799 | file_to_read_not_found: |
801 | file_to_read_not_found: |
800 | cmp [hd_error],0 |
802 | cmp [hd_error],0 |
801 | jne file_access_denied |
803 | jne file_access_denied |
802 | popad |
804 | popad |
803 | mov [hd1_status],0 |
805 | mov [hd1_status],0 |
804 | xor ebx,ebx |
806 | xor ebx,ebx |
805 | mov eax,ERROR_FILE_NOT_FOUND |
807 | mov eax,ERROR_FILE_NOT_FOUND |
806 | ret |
808 | ret |
807 | 809 | ||
808 | file_access_denied: |
810 | file_access_denied: |
809 | popad |
811 | popad |
810 | mov [hd1_status],0 |
812 | mov [hd1_status],0 |
811 | xor ebx,ebx |
813 | xor ebx,ebx |
812 | mov eax,ERROR_ACCESS_DENIED |
814 | mov eax,ERROR_ACCESS_DENIED |
813 | ret |
815 | ret |
814 | 816 | ||
815 | get_dir_size: |
817 | get_dir_size: |
816 | ;----------------------------------------------------- |
818 | ;----------------------------------------------------- |
817 | ; input : eax = first cluster (0=rootdir) |
819 | ; input : eax = first cluster (0=rootdir) |
818 | ; output : eax = directory size in bytes |
820 | ; output : eax = directory size in bytes |
819 | ;----------------------------------------------------- |
821 | ;----------------------------------------------------- |
820 | push edx |
822 | push edx |
821 | xor edx,edx ; count of directory clusters |
823 | xor edx,edx ; count of directory clusters |
822 | test eax,eax |
824 | test eax,eax |
823 | jnz dir_size_next |
825 | jnz dir_size_next |
824 | 826 | ||
825 | mov eax,[ROOT_SECTORS] |
827 | mov eax,[ROOT_SECTORS] |
826 | shl eax,9 ; fat16 rootdir size in bytes |
828 | shl eax,9 ; fat16 rootdir size in bytes |
827 | cmp [fs_type],16 |
829 | cmp [fs_type],16 |
828 | je dir_size_ret |
830 | je dir_size_ret |
829 | mov eax,[ROOT_CLUSTER] |
831 | mov eax,[ROOT_CLUSTER] |
830 | 832 | ||
831 | dir_size_next: |
833 | dir_size_next: |
832 | cmp eax,2 ; incorrect fat chain |
834 | cmp eax,2 ; incorrect fat chain |
833 | jb dir_size_end |
835 | jb dir_size_end |
834 | cmp eax,[fatRESERVED] ; end of directory |
836 | cmp eax,[fatRESERVED] ; end of directory |
835 | ja dir_size_end |
837 | ja dir_size_end |
836 | call get_FAT ; get next cluster |
838 | call get_FAT ; get next cluster |
837 | cmp [hd_error],0 |
839 | cmp [hd_error],0 |
838 | jne dir_size_ret |
840 | jne dir_size_ret |
839 | 841 | ||
840 | inc edx |
842 | inc edx |
841 | jmp dir_size_next |
843 | jmp dir_size_next |
842 | 844 | ||
843 | dir_size_end: |
845 | dir_size_end: |
844 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
846 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
845 | imul eax,edx |
847 | imul eax,edx |
846 | 848 | ||
847 | dir_size_ret: |
849 | dir_size_ret: |
848 | pop edx |
850 | pop edx |
849 | ret |
851 | ret |
850 | 852 | ||
851 | 853 | ||
852 | clear_cluster_chain: |
854 | clear_cluster_chain: |
853 | ;----------------------------------------------------- |
855 | ;----------------------------------------------------- |
854 | ; input : eax = first cluster |
856 | ; input : eax = first cluster |
855 | ;----------------------------------------------------- |
857 | ;----------------------------------------------------- |
856 | push eax ecx edx |
858 | push eax ecx edx |
857 | xor ecx,ecx ; cluster count |
859 | xor ecx,ecx ; cluster count |
858 | 860 | ||
859 | clean_new_chain: |
861 | clean_new_chain: |
860 | cmp eax,[LAST_CLUSTER] ; end of file |
862 | cmp eax,[LAST_CLUSTER] ; end of file |
861 | ja delete_OK |
863 | ja delete_OK |
862 | cmp eax,2 ; unfinished fat chain or zero length file |
864 | cmp eax,2 ; unfinished fat chain or zero length file |
863 | jb delete_OK |
865 | jb delete_OK |
864 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
866 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
865 | jz delete_OK |
867 | jz delete_OK |
866 | 868 | ||
867 | xor edx,edx |
869 | xor edx,edx |
868 | call set_FAT ; clear fat entry |
870 | call set_FAT ; clear fat entry |
869 | cmp [hd_error],0 |
871 | cmp [hd_error],0 |
870 | jne access_denied_01 |
872 | jne access_denied_01 |
871 | 873 | ||
872 | inc ecx ; update cluster count |
874 | inc ecx ; update cluster count |
873 | mov eax,edx ; old cluster |
875 | mov eax,edx ; old cluster |
874 | jmp clean_new_chain |
876 | jmp clean_new_chain |
875 | 877 | ||
876 | delete_OK: |
878 | delete_OK: |
877 | call add_disk_free_space ; add clusters to free disk space |
879 | call add_disk_free_space ; add clusters to free disk space |
878 | access_denied_01: |
880 | access_denied_01: |
879 | pop edx ecx eax |
881 | pop edx ecx eax |
880 | ret |
882 | ret |
881 | 883 | ||
882 | 884 | ||
883 | get_hd_info: |
885 | get_hd_info: |
884 | ;----------------------------------------------------------- |
886 | ;----------------------------------------------------------- |
885 | ; output : eax = 0 - ok |
887 | ; output : eax = 0 - ok |
886 | ; 3 - unknown FS |
888 | ; 3 - unknown FS |
887 | ; 10 - access denied |
889 | ; 10 - access denied |
888 | ; edx = cluster size in bytes |
890 | ; edx = cluster size in bytes |
889 | ; ebx = total clusters on disk |
891 | ; ebx = total clusters on disk |
890 | ; ecx = free clusters on disk |
892 | ; ecx = free clusters on disk |
891 | ;----------------------------------------------------------- |
893 | ;----------------------------------------------------------- |
892 | cmp [fs_type], 16 |
894 | cmp [fs_type], 16 |
893 | jz info_fat_ok |
895 | jz info_fat_ok |
894 | cmp [fs_type], 32 |
896 | cmp [fs_type], 32 |
895 | jz info_fat_ok |
897 | jz info_fat_ok |
896 | xor edx,edx |
898 | xor edx,edx |
897 | xor ebx,ebx |
899 | xor ebx,ebx |
898 | xor ecx,ecx |
900 | xor ecx,ecx |
899 | mov eax,ERROR_UNKNOWN_FS |
901 | mov eax,ERROR_UNKNOWN_FS |
900 | ret |
902 | ret |
901 | 903 | ||
902 | info_fat_ok: |
904 | info_fat_ok: |
903 | ; call reserve_hd1 |
905 | ; call reserve_hd1 |
904 | 906 | ||
905 | xor ecx,ecx ; count of free clusters |
907 | xor ecx,ecx ; count of free clusters |
906 | mov eax,2 |
908 | mov eax,2 |
907 | mov ebx,[LAST_CLUSTER] |
909 | mov ebx,[LAST_CLUSTER] |
908 | 910 | ||
909 | info_cluster: |
911 | info_cluster: |
910 | push eax |
912 | push eax |
911 | call get_FAT ; get cluster info |
913 | call get_FAT ; get cluster info |
912 | cmp [hd_error],0 |
914 | cmp [hd_error],0 |
913 | jne info_access_denied |
915 | jne info_access_denied |
914 | 916 | ||
915 | test eax,eax ; is it free? |
917 | test eax,eax ; is it free? |
916 | jnz info_used ; no |
918 | jnz info_used ; no |
917 | inc ecx |
919 | inc ecx |
918 | 920 | ||
919 | info_used: |
921 | info_used: |
920 | pop eax |
922 | pop eax |
921 | inc eax |
923 | inc eax |
922 | cmp eax,ebx ; is above last cluster? |
924 | cmp eax,ebx ; is above last cluster? |
923 | jbe info_cluster ; no. test next cluster |
925 | jbe info_cluster ; no. test next cluster |
924 | 926 | ||
925 | dec ebx ; cluster count |
927 | dec ebx ; cluster count |
926 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
928 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
927 | mov [hd1_status],0 |
929 | mov [hd1_status],0 |
928 | xor eax,eax |
930 | xor eax,eax |
929 | ret |
931 | ret |
930 | 932 | ||
931 | info_access_denied: |
933 | info_access_denied: |
932 | add esp,4 |
934 | add esp,4 |
933 | xor edx,edx |
935 | xor edx,edx |
934 | xor ebx,ebx |
936 | xor ebx,ebx |
935 | xor ecx,ecx |
937 | xor ecx,ecx |
936 | mov eax,ERROR_ACCESS_DENIED |
938 | mov eax,ERROR_ACCESS_DENIED |
937 | ret |
939 | ret |
938 | 940 | ||
939 | update_disk: |
941 | update_disk: |
940 | ;----------------------------------------------------------- |
942 | ;----------------------------------------------------------- |
941 | ; write changed fat and cache to disk |
943 | ; write changed fat and cache to disk |
942 | ;----------------------------------------------------------- |
944 | ;----------------------------------------------------------- |
943 | cmp [fat_change],0 ; is fat changed? |
945 | cmp [fat_change],0 ; is fat changed? |
944 | je upd_no_change |
946 | je upd_no_change |
945 | 947 | ||
946 | call write_fat_sector |
948 | call write_fat_sector |
947 | cmp [hd_error],0 |
949 | cmp [hd_error],0 |
948 | jne update_disk_acces_denied |
950 | jne update_disk_acces_denied |
949 | 951 | ||
950 | upd_no_change: |
952 | upd_no_change: |
951 | 953 | ||
952 | call write_cache |
954 | call write_cache |
953 | update_disk_acces_denied: |
955 | update_disk_acces_denied: |
954 | ret |
956 | ret |
955 | 957 | ||
956 | 958 | ||
957 | ; \begin{diamond} |
959 | ; \begin{diamond} |
958 | hd_find_lfn: |
960 | hd_find_lfn: |
959 | ; in: esi+ebp -> name |
961 | ; in: esi+ebp -> name |
960 | ; out: CF=1 - file not found |
962 | ; out: CF=1 - file not found |
961 | ; else CF=0 and edi->direntry, eax=sector |
963 | ; else CF=0 and edi->direntry, eax=sector |
962 | ; destroys eax |
964 | ; destroys eax |
963 | push esi edi |
965 | push esi edi |
964 | push 0 |
966 | push 0 |
965 | push 0 |
967 | push 0 |
966 | push fat16_root_first |
968 | push fat16_root_first |
967 | push fat16_root_next |
969 | push fat16_root_next |
968 | mov eax, [ROOT_CLUSTER] |
970 | mov eax, [ROOT_CLUSTER] |
969 | cmp [fs_type], 32 |
971 | cmp [fs_type], 32 |
970 | jz .fat32 |
972 | jz .fat32 |
971 | .loop: |
973 | .loop: |
972 | call fat_find_lfn |
974 | call fat_find_lfn |
973 | jc .notfound |
975 | jc .notfound |
974 | cmp byte [esi], 0 |
976 | cmp byte [esi], 0 |
975 | jz .found |
977 | jz .found |
976 | .continue: |
978 | .continue: |
977 | test byte [edi+11], 10h |
979 | test byte [edi+11], 10h |
978 | jz .notfound |
980 | jz .notfound |
979 | and dword [esp+12], 0 |
981 | and dword [esp+12], 0 |
980 | mov eax, [edi+20-2] |
982 | mov eax, [edi+20-2] |
981 | mov ax, [edi+26] ; cluster |
983 | mov ax, [edi+26] ; cluster |
982 | .fat32: |
984 | .fat32: |
983 | mov [esp+8], eax |
985 | mov [esp+8], eax |
984 | mov dword [esp+4], fat_notroot_first |
986 | mov dword [esp+4], fat_notroot_first |
985 | mov dword [esp], fat_notroot_next |
987 | mov dword [esp], fat_notroot_next |
986 | jmp .loop |
988 | jmp .loop |
987 | .notfound: |
989 | .notfound: |
988 | add esp, 16 |
990 | add esp, 16 |
989 | pop edi esi |
991 | pop edi esi |
990 | stc |
992 | stc |
991 | ret |
993 | ret |
992 | .found: |
994 | .found: |
993 | test ebp, ebp |
995 | test ebp, ebp |
994 | jz @f |
996 | jz @f |
995 | mov esi, ebp |
997 | mov esi, ebp |
996 | xor ebp, ebp |
998 | xor ebp, ebp |
997 | jmp .continue |
999 | jmp .continue |
998 | @@: |
1000 | @@: |
999 | lea eax, [esp+8] |
1001 | lea eax, [esp+8] |
1000 | cmp dword [eax], 0 |
1002 | cmp dword [eax], 0 |
1001 | jz .root |
1003 | jz .root |
1002 | call fat_get_sector |
1004 | call fat_get_sector |
1003 | jmp .cmn |
1005 | jmp .cmn |
1004 | .root: |
1006 | .root: |
1005 | mov eax, [eax+4] |
1007 | mov eax, [eax+4] |
1006 | add eax, [ROOT_START] |
1008 | add eax, [ROOT_START] |
1007 | .cmn: |
1009 | .cmn: |
1008 | add esp, 20 ; CF=0 |
1010 | add esp, 20 ; CF=0 |
1009 | pop esi |
1011 | pop esi |
1010 | ret |
1012 | ret |
1011 | 1013 | ||
1012 | ;---------------------------------------------------------------- |
1014 | ;---------------------------------------------------------------- |
1013 | ; |
1015 | ; |
1014 | ; fs_HdRead - LFN variant for reading hard disk |
1016 | ; fs_HdRead - LFN variant for reading hard disk |
1015 | ; |
1017 | ; |
1016 | ; esi points to filename |
1018 | ; esi points to filename |
1017 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
1019 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
1018 | ; may be ebx=0 - start from first byte |
1020 | ; may be ebx=0 - start from first byte |
1019 | ; ecx number of bytes to read, 0+ |
1021 | ; ecx number of bytes to read, 0+ |
1020 | ; edx mem location to return data |
1022 | ; edx mem location to return data |
1021 | ; |
1023 | ; |
1022 | ; ret ebx = bytes read or 0xffffffff file not found |
1024 | ; ret ebx = bytes read or 0xffffffff file not found |
1023 | ; eax = 0 ok read or other = errormsg |
1025 | ; eax = 0 ok read or other = errormsg |
1024 | ; |
1026 | ; |
1025 | ;-------------------------------------------------------------- |
1027 | ;-------------------------------------------------------------- |
1026 | fs_HdRead: |
1028 | fs_HdRead: |
1027 | cmp [fs_type], 16 |
1029 | cmp [fs_type], 16 |
1028 | jz @f |
1030 | jz @f |
1029 | cmp [fs_type], 32 |
1031 | cmp [fs_type], 32 |
1030 | jz @f |
1032 | jz @f |
1031 | cmp [fs_type], 1 |
1033 | cmp [fs_type], 1 |
1032 | jz ntfs_HdRead |
1034 | jz ntfs_HdRead |
1033 | or ebx, -1 |
1035 | or ebx, -1 |
1034 | mov eax, ERROR_UNKNOWN_FS |
1036 | mov eax, ERROR_UNKNOWN_FS |
1035 | ret |
1037 | ret |
1036 | @@: |
1038 | @@: |
1037 | push edi |
1039 | push edi |
1038 | cmp byte [esi], 0 |
1040 | cmp byte [esi], 0 |
1039 | jnz @f |
1041 | jnz @f |
1040 | .noaccess: |
1042 | .noaccess: |
1041 | pop edi |
1043 | pop edi |
1042 | .noaccess_2: |
1044 | .noaccess_2: |
1043 | or ebx, -1 |
1045 | or ebx, -1 |
1044 | mov eax, ERROR_ACCESS_DENIED |
1046 | mov eax, ERROR_ACCESS_DENIED |
1045 | ret |
1047 | ret |
1046 | 1048 | ||
1047 | .noaccess_3: |
1049 | .noaccess_3: |
1048 | add esp,4 |
1050 | add esp,4 |
1049 | .noaccess_1: |
1051 | .noaccess_1: |
1050 | add esp,4 |
1052 | add esp,4 |
1051 | .noaccess_4: |
1053 | .noaccess_4: |
1052 | add esp,4*5 |
1054 | add esp,4*5 |
1053 | jmp .noaccess_2 |
1055 | jmp .noaccess_2 |
1054 | 1056 | ||
1055 | @@: |
1057 | @@: |
1056 | call hd_find_lfn |
1058 | call hd_find_lfn |
1057 | jnc .found |
1059 | jnc .found |
1058 | pop edi |
1060 | pop edi |
1059 | cmp [hd_error],0 |
1061 | cmp [hd_error],0 |
1060 | jne .noaccess_2 |
1062 | jne .noaccess_2 |
1061 | or ebx, -1 |
1063 | or ebx, -1 |
1062 | mov eax, ERROR_FILE_NOT_FOUND |
1064 | mov eax, ERROR_FILE_NOT_FOUND |
1063 | ret |
1065 | ret |
1064 | 1066 | ||
1065 | .found: |
1067 | .found: |
1066 | test byte [edi+11], 0x10 ; do not allow read directories |
1068 | test byte [edi+11], 0x10 ; do not allow read directories |
1067 | jnz .noaccess |
1069 | jnz .noaccess |
1068 | test ebx, ebx |
1070 | test ebx, ebx |
1069 | jz .l1 |
1071 | jz .l1 |
1070 | cmp dword [ebx+4], 0 |
1072 | cmp dword [ebx+4], 0 |
1071 | jz @f |
1073 | jz @f |
1072 | xor ebx, ebx |
1074 | xor ebx, ebx |
1073 | .reteof: |
1075 | .reteof: |
1074 | mov eax, 6 |
1076 | mov eax, 6 |
1075 | pop edi |
1077 | pop edi |
1076 | ret |
1078 | ret |
1077 | @@: |
1079 | @@: |
1078 | mov ebx, [ebx] |
1080 | mov ebx, [ebx] |
1079 | .l1: |
1081 | .l1: |
1080 | push ecx edx |
1082 | push ecx edx |
1081 | push 0 |
1083 | push 0 |
1082 | mov eax, [edi+28] |
1084 | mov eax, [edi+28] |
1083 | sub eax, ebx |
1085 | sub eax, ebx |
1084 | jb .eof |
1086 | jb .eof |
1085 | cmp eax, ecx |
1087 | cmp eax, ecx |
1086 | jae @f |
1088 | jae @f |
1087 | mov ecx, eax |
1089 | mov ecx, eax |
1088 | mov byte [esp], 6 |
1090 | mov byte [esp], 6 |
1089 | @@: |
1091 | @@: |
1090 | mov eax, [edi+20-2] |
1092 | mov eax, [edi+20-2] |
1091 | mov ax, [edi+26] |
1093 | mov ax, [edi+26] |
1092 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1094 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1093 | .new_cluster: |
1095 | .new_cluster: |
1094 | jecxz .new_sector |
1096 | jecxz .new_sector |
1095 | test eax, eax |
1097 | test eax, eax |
1096 | jz .eof |
1098 | jz .eof |
1097 | cmp eax, [fatRESERVED] |
1099 | cmp eax, [fatRESERVED] |
1098 | jae .eof |
1100 | jae .eof |
1099 | mov [cluster_tmp], eax |
1101 | mov [cluster_tmp], eax |
1100 | dec eax |
1102 | dec eax |
1101 | dec eax |
1103 | dec eax |
1102 | mov edi, [SECTORS_PER_CLUSTER] |
1104 | mov edi, [SECTORS_PER_CLUSTER] |
1103 | imul eax, edi |
1105 | imul eax, edi |
1104 | add eax, [DATA_START] |
1106 | add eax, [DATA_START] |
1105 | .new_sector: |
1107 | .new_sector: |
1106 | test ecx, ecx |
1108 | test ecx, ecx |
1107 | jz .done |
1109 | jz .done |
1108 | sub ebx, 512 |
1110 | sub ebx, 512 |
1109 | jae .skip |
1111 | jae .skip |
1110 | add ebx, 512 |
1112 | add ebx, 512 |
1111 | jnz .force_buf |
1113 | jnz .force_buf |
1112 | cmp ecx, 512 |
1114 | cmp ecx, 512 |
1113 | jb .force_buf |
1115 | jb .force_buf |
1114 | ; we may read directly to given buffer |
1116 | ; we may read directly to given buffer |
1115 | push ebx |
1117 | push ebx |
1116 | mov ebx, edx |
1118 | mov ebx, edx |
1117 | call hd_read |
1119 | call hd_read |
1118 | cmp [hd_error],0 |
1120 | cmp [hd_error],0 |
1119 | jne .noaccess_1 |
1121 | jne .noaccess_1 |
1120 | pop ebx |
1122 | pop ebx |
1121 | add edx, 512 |
1123 | add edx, 512 |
1122 | sub ecx, 512 |
1124 | sub ecx, 512 |
1123 | jmp .skip |
1125 | jmp .skip |
1124 | .force_buf: |
1126 | .force_buf: |
1125 | ; we must read sector to temporary buffer and then copy it to destination |
1127 | ; we must read sector to temporary buffer and then copy it to destination |
1126 | push eax ebx |
1128 | push eax ebx |
1127 | mov ebx, buffer |
1129 | mov ebx, buffer |
1128 | call hd_read |
1130 | call hd_read |
1129 | cmp [hd_error],0 |
1131 | cmp [hd_error],0 |
1130 | jne .noaccess_3 |
1132 | jne .noaccess_3 |
1131 | 1133 | ||
1132 | mov eax, ebx |
1134 | mov eax, ebx |
1133 | pop ebx |
1135 | pop ebx |
1134 | add eax, ebx |
1136 | add eax, ebx |
1135 | push ecx |
1137 | push ecx |
1136 | add ecx, ebx |
1138 | add ecx, ebx |
1137 | cmp ecx, 512 |
1139 | cmp ecx, 512 |
1138 | jbe @f |
1140 | jbe @f |
1139 | mov ecx, 512 |
1141 | mov ecx, 512 |
1140 | @@: |
1142 | @@: |
1141 | sub ecx, ebx |
1143 | sub ecx, ebx |
1142 | mov ebx, edx |
1144 | mov ebx, edx |
1143 | call memmove |
1145 | call memmove |
1144 | add edx, ecx |
1146 | add edx, ecx |
1145 | sub [esp], ecx |
1147 | sub [esp], ecx |
1146 | pop ecx |
1148 | pop ecx |
1147 | pop eax |
1149 | pop eax |
1148 | xor ebx, ebx |
1150 | xor ebx, ebx |
1149 | .skip: |
1151 | .skip: |
1150 | inc eax |
1152 | inc eax |
1151 | dec edi |
1153 | dec edi |
1152 | jnz .new_sector |
1154 | jnz .new_sector |
1153 | mov eax, [cluster_tmp] |
1155 | mov eax, [cluster_tmp] |
1154 | call get_FAT |
1156 | call get_FAT |
1155 | cmp [hd_error],0 |
1157 | cmp [hd_error],0 |
1156 | jne .noaccess_4 |
1158 | jne .noaccess_4 |
1157 | 1159 | ||
1158 | jmp .new_cluster |
1160 | jmp .new_cluster |
1159 | .done: |
1161 | .done: |
1160 | mov ebx, edx |
1162 | mov ebx, edx |
1161 | pop eax edx ecx edi |
1163 | pop eax edx ecx edi |
1162 | sub ebx, edx |
1164 | sub ebx, edx |
1163 | ret |
1165 | ret |
1164 | .eof: |
1166 | .eof: |
1165 | mov ebx, edx |
1167 | mov ebx, edx |
1166 | pop eax edx ecx |
1168 | pop eax edx ecx |
1167 | sub ebx, edx |
1169 | sub ebx, edx |
1168 | jmp .reteof |
1170 | jmp .reteof |
1169 | 1171 | ||
1170 | ;---------------------------------------------------------------- |
1172 | ;---------------------------------------------------------------- |
1171 | ; |
1173 | ; |
1172 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
1174 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
1173 | ; |
1175 | ; |
1174 | ; esi points to filename |
1176 | ; esi points to filename |
1175 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
1177 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
1176 | ; & flags (bitfields) |
1178 | ; & flags (bitfields) |
1177 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
1179 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
1178 | ; ecx number of blocks to read, 0+ |
1180 | ; ecx number of blocks to read, 0+ |
1179 | ; edx mem location to return data |
1181 | ; edx mem location to return data |
1180 | ; |
1182 | ; |
1181 | ; ret ebx = blocks read or 0xffffffff folder not found |
1183 | ; ret ebx = blocks read or 0xffffffff folder not found |
1182 | ; eax = 0 ok read or other = errormsg |
1184 | ; eax = 0 ok read or other = errormsg |
1183 | ; |
1185 | ; |
1184 | ;-------------------------------------------------------------- |
1186 | ;-------------------------------------------------------------- |
1185 | fs_HdReadFolder: |
1187 | fs_HdReadFolder: |
1186 | cmp [fs_type], 1 |
1188 | cmp [fs_type], 1 |
1187 | jz ntfs_HdReadFolder |
1189 | jz ntfs_HdReadFolder |
1188 | cmp [fs_type], 16 |
1190 | cmp [fs_type], 16 |
1189 | jz @f |
1191 | jz @f |
1190 | cmp [fs_type], 32 |
1192 | cmp [fs_type], 32 |
1191 | jz @f |
1193 | jz @f |
1192 | push ERROR_UNSUPPORTED_FS |
1194 | push ERROR_UNSUPPORTED_FS |
1193 | pop eax |
1195 | pop eax |
1194 | or ebx, -1 |
1196 | or ebx, -1 |
1195 | ret |
1197 | ret |
1196 | @@: |
1198 | @@: |
1197 | mov eax, [ROOT_CLUSTER] |
1199 | mov eax, [ROOT_CLUSTER] |
1198 | push edi |
1200 | push edi |
1199 | cmp byte [esi], 0 |
1201 | cmp byte [esi], 0 |
1200 | jz .doit |
1202 | jz .doit |
1201 | call hd_find_lfn |
1203 | call hd_find_lfn |
1202 | jnc .found |
1204 | jnc .found |
1203 | pop edi |
1205 | pop edi |
1204 | or ebx, -1 |
1206 | or ebx, -1 |
1205 | mov eax, ERROR_FILE_NOT_FOUND |
1207 | mov eax, ERROR_FILE_NOT_FOUND |
1206 | ret |
1208 | ret |
1207 | .found: |
1209 | .found: |
1208 | test byte [edi+11], 0x10 ; do not allow read files |
1210 | test byte [edi+11], 0x10 ; do not allow read files |
1209 | jnz .found_dir |
1211 | jnz .found_dir |
1210 | pop edi |
1212 | pop edi |
1211 | or ebx, -1 |
1213 | or ebx, -1 |
1212 | mov eax, ERROR_ACCESS_DENIED |
1214 | mov eax, ERROR_ACCESS_DENIED |
1213 | ret |
1215 | ret |
1214 | .found_dir: |
1216 | .found_dir: |
1215 | mov eax, [edi+20-2] |
1217 | mov eax, [edi+20-2] |
1216 | mov ax, [edi+26] ; eax=cluster |
1218 | mov ax, [edi+26] ; eax=cluster |
1217 | .doit: |
1219 | .doit: |
1218 | push esi ecx |
1220 | push esi ecx |
1219 | push ebp |
1221 | push ebp |
1220 | sub esp, 262*2 ; reserve space for LFN |
1222 | sub esp, 262*2 ; reserve space for LFN |
1221 | mov ebp, esp |
1223 | mov ebp, esp |
1222 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1224 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
1223 | mov ebx, [ebx] |
1225 | mov ebx, [ebx] |
1224 | ; init header |
1226 | ; init header |
1225 | push eax ecx |
1227 | push eax ecx |
1226 | mov edi, edx |
1228 | mov edi, edx |
1227 | mov ecx, 32/4 |
1229 | mov ecx, 32/4 |
1228 | xor eax, eax |
1230 | xor eax, eax |
1229 | rep stosd |
1231 | rep stosd |
1230 | pop ecx eax |
1232 | pop ecx eax |
1231 | mov byte [edx], 1 ; version |
1233 | mov byte [edx], 1 ; version |
1232 | mov esi, edi ; esi points to BDFE |
1234 | mov esi, edi ; esi points to BDFE |
1233 | .new_cluster: |
1235 | .new_cluster: |
1234 | mov [cluster_tmp], eax |
1236 | mov [cluster_tmp], eax |
1235 | test eax, eax |
1237 | test eax, eax |
1236 | jnz @f |
1238 | jnz @f |
1237 | cmp [fs_type], 32 |
1239 | cmp [fs_type], 32 |
1238 | jz .notfound |
1240 | jz .notfound |
1239 | mov eax, [ROOT_START] |
1241 | mov eax, [ROOT_START] |
1240 | push [ROOT_SECTORS] |
1242 | push [ROOT_SECTORS] |
1241 | push ebx |
1243 | push ebx |
1242 | jmp .new_sector |
1244 | jmp .new_sector |
1243 | @@: |
1245 | @@: |
1244 | dec eax |
1246 | dec eax |
1245 | dec eax |
1247 | dec eax |
1246 | imul eax, [SECTORS_PER_CLUSTER] |
1248 | imul eax, [SECTORS_PER_CLUSTER] |
1247 | push [SECTORS_PER_CLUSTER] |
1249 | push [SECTORS_PER_CLUSTER] |
1248 | add eax, [DATA_START] |
1250 | add eax, [DATA_START] |
1249 | push ebx |
1251 | push ebx |
1250 | .new_sector: |
1252 | .new_sector: |
1251 | mov ebx, buffer |
1253 | mov ebx, buffer |
1252 | mov edi, ebx |
1254 | mov edi, ebx |
1253 | call hd_read |
1255 | call hd_read |
1254 | cmp [hd_error], 0 |
1256 | cmp [hd_error], 0 |
1255 | jnz .notfound2 |
1257 | jnz .notfound2 |
1256 | add ebx, 512 |
1258 | add ebx, 512 |
1257 | push eax |
1259 | push eax |
1258 | .l1: |
1260 | .l1: |
1259 | call fat_get_name |
1261 | call fat_get_name |
1260 | jc .l2 |
1262 | jc .l2 |
1261 | cmp byte [edi+11], 0xF |
1263 | cmp byte [edi+11], 0xF |
1262 | jnz .do_bdfe |
1264 | jnz .do_bdfe |
1263 | add edi, 0x20 |
1265 | add edi, 0x20 |
1264 | cmp edi, ebx |
1266 | cmp edi, ebx |
1265 | jb .do_bdfe |
1267 | jb .do_bdfe |
1266 | pop eax |
1268 | pop eax |
1267 | inc eax |
1269 | inc eax |
1268 | dec dword [esp+4] |
1270 | dec dword [esp+4] |
1269 | jnz @f |
1271 | jnz @f |
1270 | mov eax, [cluster_tmp] |
1272 | mov eax, [cluster_tmp] |
1271 | test eax, eax |
1273 | test eax, eax |
1272 | jz .done |
1274 | jz .done |
1273 | call get_FAT |
1275 | call get_FAT |
1274 | cmp [hd_error], 0 |
1276 | cmp [hd_error], 0 |
1275 | jnz .notfound2 |
1277 | jnz .notfound2 |
1276 | cmp eax, 2 |
1278 | cmp eax, 2 |
1277 | jb .done |
1279 | jb .done |
1278 | cmp eax, [fatRESERVED] |
1280 | cmp eax, [fatRESERVED] |
1279 | jae .done |
1281 | jae .done |
1280 | push eax |
1282 | push eax |
1281 | mov eax, [SECTORS_PER_CLUSTER] |
1283 | mov eax, [SECTORS_PER_CLUSTER] |
1282 | mov [esp+8], eax |
1284 | mov [esp+8], eax |
1283 | pop eax |
1285 | pop eax |
1284 | mov [cluster_tmp], eax |
1286 | mov [cluster_tmp], eax |
1285 | dec eax |
1287 | dec eax |
1286 | dec eax |
1288 | dec eax |
1287 | imul eax, [SECTORS_PER_CLUSTER] |
1289 | imul eax, [SECTORS_PER_CLUSTER] |
1288 | add eax, [DATA_START] |
1290 | add eax, [DATA_START] |
1289 | @@: |
1291 | @@: |
1290 | mov ebx, buffer |
1292 | mov ebx, buffer |
1291 | mov edi, ebx |
1293 | mov edi, ebx |
1292 | call hd_read |
1294 | call hd_read |
1293 | cmp [hd_error], 0 |
1295 | cmp [hd_error], 0 |
1294 | jnz .notfound2 |
1296 | jnz .notfound2 |
1295 | add ebx, 512 |
1297 | add ebx, 512 |
1296 | push eax |
1298 | push eax |
1297 | .do_bdfe: |
1299 | .do_bdfe: |
1298 | inc dword [edx+8] ; new file found |
1300 | inc dword [edx+8] ; new file found |
1299 | dec dword [esp+4] |
1301 | dec dword [esp+4] |
1300 | jns .l2 |
1302 | jns .l2 |
1301 | dec ecx |
1303 | dec ecx |
1302 | js .l2 |
1304 | js .l2 |
1303 | inc dword [edx+4] ; new file block copied |
1305 | inc dword [edx+4] ; new file block copied |
1304 | call fat_entry_to_bdfe |
1306 | call fat_entry_to_bdfe |
1305 | .l2: |
1307 | .l2: |
1306 | add edi, 0x20 |
1308 | add edi, 0x20 |
1307 | cmp edi, ebx |
1309 | cmp edi, ebx |
1308 | jb .l1 |
1310 | jb .l1 |
1309 | pop eax |
1311 | pop eax |
1310 | inc eax |
1312 | inc eax |
1311 | dec dword [esp+4] |
1313 | dec dword [esp+4] |
1312 | jnz .new_sector |
1314 | jnz .new_sector |
1313 | mov eax, [cluster_tmp] |
1315 | mov eax, [cluster_tmp] |
1314 | test eax, eax |
1316 | test eax, eax |
1315 | jz .done |
1317 | jz .done |
1316 | call get_FAT |
1318 | call get_FAT |
1317 | cmp [hd_error], 0 |
1319 | cmp [hd_error], 0 |
1318 | jnz .notfound2 |
1320 | jnz .notfound2 |
1319 | cmp eax, 2 |
1321 | cmp eax, 2 |
1320 | jb .done |
1322 | jb .done |
1321 | cmp eax, [fatRESERVED] |
1323 | cmp eax, [fatRESERVED] |
1322 | jae .done |
1324 | jae .done |
1323 | push eax |
1325 | push eax |
1324 | mov eax, [SECTORS_PER_CLUSTER] |
1326 | mov eax, [SECTORS_PER_CLUSTER] |
1325 | mov [esp+8], eax |
1327 | mov [esp+8], eax |
1326 | pop eax |
1328 | pop eax |
1327 | pop ebx |
1329 | pop ebx |
1328 | add esp, 4 |
1330 | add esp, 4 |
1329 | jmp .new_cluster |
1331 | jmp .new_cluster |
1330 | .notfound2: |
1332 | .notfound2: |
1331 | add esp, 8 |
1333 | add esp, 8 |
1332 | .notfound: |
1334 | .notfound: |
1333 | add esp, 262*2+4 |
1335 | add esp, 262*2+4 |
1334 | pop ebp ecx esi edi |
1336 | pop ebp ecx esi edi |
1335 | mov eax, ERROR_FILE_NOT_FOUND |
1337 | mov eax, ERROR_FILE_NOT_FOUND |
1336 | or ebx, -1 |
1338 | or ebx, -1 |
1337 | ret |
1339 | ret |
1338 | .done: |
1340 | .done: |
1339 | add esp, 262*2+4+8 |
1341 | add esp, 262*2+4+8 |
1340 | pop ebp |
1342 | pop ebp |
1341 | mov ebx, [edx+4] |
1343 | mov ebx, [edx+4] |
1342 | xor eax, eax |
1344 | xor eax, eax |
1343 | dec ecx |
1345 | dec ecx |
1344 | js @f |
1346 | js @f |
1345 | mov al, ERROR_END_OF_FILE |
1347 | mov al, ERROR_END_OF_FILE |
1346 | @@: |
1348 | @@: |
1347 | pop ecx esi edi |
1349 | pop ecx esi edi |
1348 | ret |
1350 | ret |
1349 | 1351 | ||
1350 | fat16_root_next: |
1352 | fat16_root_next: |
1351 | cmp edi, buffer+0x200-0x20 |
1353 | cmp edi, buffer+0x200-0x20 |
1352 | jae fat16_root_next_sector |
1354 | jae fat16_root_next_sector |
1353 | add edi, 0x20 |
1355 | add edi, 0x20 |
1354 | ret ; CF=0 |
1356 | ret ; CF=0 |
1355 | fat16_root_next_sector: |
1357 | fat16_root_next_sector: |
1356 | ; read next sector |
1358 | ; read next sector |
1357 | push [longname_sec2] |
1359 | push [longname_sec2] |
1358 | pop [longname_sec1] |
1360 | pop [longname_sec1] |
1359 | push ecx |
1361 | push ecx |
1360 | mov ecx, [eax+4] |
1362 | mov ecx, [eax+4] |
1361 | push ecx |
1363 | push ecx |
1362 | add ecx, [ROOT_START] |
1364 | add ecx, [ROOT_START] |
1363 | mov [longname_sec2], ecx |
1365 | mov [longname_sec2], ecx |
1364 | pop ecx |
1366 | pop ecx |
1365 | inc ecx |
1367 | inc ecx |
1366 | mov [eax+4], ecx |
1368 | mov [eax+4], ecx |
1367 | cmp ecx, [ROOT_SECTORS] |
1369 | cmp ecx, [ROOT_SECTORS] |
1368 | pop ecx |
1370 | pop ecx |
1369 | jae fat16_root_first.readerr |
1371 | jae fat16_root_first.readerr |
1370 | fat16_root_first: |
1372 | fat16_root_first: |
1371 | mov eax, [eax+4] |
1373 | mov eax, [eax+4] |
1372 | add eax, [ROOT_START] |
1374 | add eax, [ROOT_START] |
1373 | push ebx |
1375 | push ebx |
1374 | mov edi, buffer |
1376 | mov edi, buffer |
1375 | mov ebx, edi |
1377 | mov ebx, edi |
1376 | call hd_read |
1378 | call hd_read |
1377 | pop ebx |
1379 | pop ebx |
1378 | cmp [hd_error], 0 |
1380 | cmp [hd_error], 0 |
1379 | jnz .readerr |
1381 | jnz .readerr |
1380 | ret ; CF=0 |
1382 | ret ; CF=0 |
1381 | .readerr: |
1383 | .readerr: |
1382 | stc |
1384 | stc |
1383 | ret |
1385 | ret |
1384 | fat16_root_begin_write: |
1386 | fat16_root_begin_write: |
1385 | push edi eax |
1387 | push edi eax |
1386 | call fat16_root_first |
1388 | call fat16_root_first |
1387 | pop eax edi |
1389 | pop eax edi |
1388 | ret |
1390 | ret |
1389 | fat16_root_end_write: |
1391 | fat16_root_end_write: |
1390 | pusha |
1392 | pusha |
1391 | mov eax, [eax+4] |
1393 | mov eax, [eax+4] |
1392 | add eax, [ROOT_START] |
1394 | add eax, [ROOT_START] |
1393 | mov ebx, buffer |
1395 | mov ebx, buffer |
1394 | call hd_write |
1396 | call hd_write |
1395 | popa |
1397 | popa |
1396 | ret |
1398 | ret |
1397 | fat16_root_next_write: |
1399 | fat16_root_next_write: |
1398 | cmp edi, buffer+0x200 |
1400 | cmp edi, buffer+0x200 |
1399 | jae @f |
1401 | jae @f |
1400 | ret |
1402 | ret |
1401 | @@: |
1403 | @@: |
1402 | call fat16_root_end_write |
1404 | call fat16_root_end_write |
1403 | jmp fat16_root_next_sector |
1405 | jmp fat16_root_next_sector |
1404 | fat16_root_extend_dir: |
1406 | fat16_root_extend_dir: |
1405 | stc |
1407 | stc |
1406 | ret |
1408 | ret |
1407 | 1409 | ||
1408 | fat_notroot_next: |
1410 | fat_notroot_next: |
1409 | cmp edi, buffer+0x200-0x20 |
1411 | cmp edi, buffer+0x200-0x20 |
1410 | jae fat_notroot_next_sector |
1412 | jae fat_notroot_next_sector |
1411 | add edi, 0x20 |
1413 | add edi, 0x20 |
1412 | ret ; CF=0 |
1414 | ret ; CF=0 |
1413 | fat_notroot_next_sector: |
1415 | fat_notroot_next_sector: |
1414 | push [longname_sec2] |
1416 | push [longname_sec2] |
1415 | pop [longname_sec1] |
1417 | pop [longname_sec1] |
1416 | push eax |
1418 | push eax |
1417 | call fat_get_sector |
1419 | call fat_get_sector |
1418 | mov [longname_sec2], eax |
1420 | mov [longname_sec2], eax |
1419 | pop eax |
1421 | pop eax |
1420 | push ecx |
1422 | push ecx |
1421 | mov ecx, [eax+4] |
1423 | mov ecx, [eax+4] |
1422 | inc ecx |
1424 | inc ecx |
1423 | cmp ecx, [SECTORS_PER_CLUSTER] |
1425 | cmp ecx, [SECTORS_PER_CLUSTER] |
1424 | jae fat_notroot_next_cluster |
1426 | jae fat_notroot_next_cluster |
1425 | mov [eax+4], ecx |
1427 | mov [eax+4], ecx |
1426 | jmp @f |
1428 | jmp @f |
1427 | fat_notroot_next_cluster: |
1429 | fat_notroot_next_cluster: |
1428 | push eax |
1430 | push eax |
1429 | mov eax, [eax] |
1431 | mov eax, [eax] |
1430 | call get_FAT |
1432 | call get_FAT |
1431 | mov ecx, eax |
1433 | mov ecx, eax |
1432 | pop eax |
1434 | pop eax |
1433 | cmp [hd_error], 0 |
1435 | cmp [hd_error], 0 |
1434 | jnz fat_notroot_next_err |
1436 | jnz fat_notroot_next_err |
1435 | cmp ecx, [fatRESERVED] |
1437 | cmp ecx, [fatRESERVED] |
1436 | jae fat_notroot_next_err |
1438 | jae fat_notroot_next_err |
1437 | mov [eax], ecx |
1439 | mov [eax], ecx |
1438 | and dword [eax+4], 0 |
1440 | and dword [eax+4], 0 |
1439 | @@: |
1441 | @@: |
1440 | pop ecx |
1442 | pop ecx |
1441 | fat_notroot_first: |
1443 | fat_notroot_first: |
1442 | call fat_get_sector |
1444 | call fat_get_sector |
1443 | push ebx |
1445 | push ebx |
1444 | mov edi, buffer |
1446 | mov edi, buffer |
1445 | mov ebx, edi |
1447 | mov ebx, edi |
1446 | call hd_read |
1448 | call hd_read |
1447 | pop ebx |
1449 | pop ebx |
1448 | cmp [hd_error], 0 |
1450 | cmp [hd_error], 0 |
1449 | jnz @f |
1451 | jnz @f |
1450 | ret ; CF=0 |
1452 | ret ; CF=0 |
1451 | fat_notroot_next_err: |
1453 | fat_notroot_next_err: |
1452 | pop ecx |
1454 | pop ecx |
1453 | @@: |
1455 | @@: |
1454 | stc |
1456 | stc |
1455 | ret |
1457 | ret |
1456 | fat_notroot_begin_write: |
1458 | fat_notroot_begin_write: |
1457 | push eax edi |
1459 | push eax edi |
1458 | call fat_notroot_first |
1460 | call fat_notroot_first |
1459 | pop edi eax |
1461 | pop edi eax |
1460 | ret |
1462 | ret |
1461 | fat_notroot_end_write: |
1463 | fat_notroot_end_write: |
1462 | call fat_get_sector |
1464 | call fat_get_sector |
1463 | push ebx |
1465 | push ebx |
1464 | mov ebx, buffer |
1466 | mov ebx, buffer |
1465 | call hd_write |
1467 | call hd_write |
1466 | pop ebx |
1468 | pop ebx |
1467 | ret |
1469 | ret |
1468 | fat_notroot_next_write: |
1470 | fat_notroot_next_write: |
1469 | cmp edi, buffer+0x200 |
1471 | cmp edi, buffer+0x200 |
1470 | jae @f |
1472 | jae @f |
1471 | ret |
1473 | ret |
1472 | @@: |
1474 | @@: |
1473 | push eax |
1475 | push eax |
1474 | call fat_notroot_end_write |
1476 | call fat_notroot_end_write |
1475 | pop eax |
1477 | pop eax |
1476 | jmp fat_notroot_next_sector |
1478 | jmp fat_notroot_next_sector |
1477 | fat_notroot_extend_dir: |
1479 | fat_notroot_extend_dir: |
1478 | push eax |
1480 | push eax |
1479 | mov eax, [eax] |
1481 | mov eax, [eax] |
1480 | call get_free_FAT |
1482 | call get_free_FAT |
1481 | jnc .found |
1483 | jnc .found |
1482 | pop eax |
1484 | pop eax |
1483 | ret ; CF=1 |
1485 | ret ; CF=1 |
1484 | .found: |
1486 | .found: |
1485 | push edx |
1487 | push edx |
1486 | mov edx, [fatEND] |
1488 | mov edx, [fatEND] |
1487 | call set_FAT |
1489 | call set_FAT |
1488 | mov edx, eax |
1490 | mov edx, eax |
1489 | mov eax, [esp+4] |
1491 | mov eax, [esp+4] |
1490 | mov eax, [eax] |
1492 | mov eax, [eax] |
1491 | push edx |
1493 | push edx |
1492 | call set_FAT |
1494 | call set_FAT |
1493 | pop edx |
1495 | pop edx |
1494 | cmp [hd_error], 0 |
1496 | cmp [hd_error], 0 |
1495 | jz @f |
1497 | jz @f |
1496 | pop edx |
1498 | pop edx |
1497 | pop eax |
1499 | pop eax |
1498 | stc |
1500 | stc |
1499 | ret |
1501 | ret |
1500 | @@: |
1502 | @@: |
1501 | push ecx |
1503 | push ecx |
1502 | or ecx, -1 |
1504 | or ecx, -1 |
1503 | call add_disk_free_space |
1505 | call add_disk_free_space |
1504 | ; zero new cluster |
1506 | ; zero new cluster |
1505 | mov ecx, 512/4 |
1507 | mov ecx, 512/4 |
1506 | mov edi, buffer |
1508 | mov edi, buffer |
1507 | push edi |
1509 | push edi |
1508 | xor eax, eax |
1510 | xor eax, eax |
1509 | rep stosd |
1511 | rep stosd |
1510 | pop edi |
1512 | pop edi |
1511 | pop ecx |
1513 | pop ecx |
1512 | mov eax, [esp+4] |
1514 | mov eax, [esp+4] |
1513 | mov [eax], edx |
1515 | mov [eax], edx |
1514 | and dword [eax+4], 0 |
1516 | and dword [eax+4], 0 |
1515 | pop edx |
1517 | pop edx |
1516 | mov eax, [eax] |
1518 | mov eax, [eax] |
1517 | dec eax |
1519 | dec eax |
1518 | dec eax |
1520 | dec eax |
1519 | push ebx ecx |
1521 | push ebx ecx |
1520 | mov ecx, [SECTORS_PER_CLUSTER] |
1522 | mov ecx, [SECTORS_PER_CLUSTER] |
1521 | imul eax, ecx |
1523 | imul eax, ecx |
1522 | add eax, [DATA_START] |
1524 | add eax, [DATA_START] |
1523 | mov ebx, edi |
1525 | mov ebx, edi |
1524 | @@: |
1526 | @@: |
1525 | call hd_write |
1527 | call hd_write |
1526 | inc eax |
1528 | inc eax |
1527 | loop @b |
1529 | loop @b |
1528 | pop ecx ebx eax |
1530 | pop ecx ebx eax |
1529 | clc |
1531 | clc |
1530 | ret |
1532 | ret |
1531 | 1533 | ||
1532 | fat_get_sector: |
1534 | fat_get_sector: |
1533 | push ecx |
1535 | push ecx |
1534 | mov ecx, [eax] |
1536 | mov ecx, [eax] |
1535 | dec ecx |
1537 | dec ecx |
1536 | dec ecx |
1538 | dec ecx |
1537 | imul ecx, [SECTORS_PER_CLUSTER] |
1539 | imul ecx, [SECTORS_PER_CLUSTER] |
1538 | add ecx, [DATA_START] |
1540 | add ecx, [DATA_START] |
1539 | add ecx, [eax+4] |
1541 | add ecx, [eax+4] |
1540 | mov eax, ecx |
1542 | mov eax, ecx |
1541 | pop ecx |
1543 | pop ecx |
1542 | ret |
1544 | ret |
1543 | 1545 | ||
1544 | ;---------------------------------------------------------------- |
1546 | ;---------------------------------------------------------------- |
1545 | ; |
1547 | ; |
1546 | ; fs_HdRewrite - LFN variant for writing hard disk |
1548 | ; fs_HdRewrite - LFN variant for writing hard disk |
1547 | ; |
1549 | ; |
1548 | ; esi points to filename |
1550 | ; esi points to filename |
1549 | ; ebx ignored (reserved) |
1551 | ; ebx ignored (reserved) |
1550 | ; ecx number of bytes to write, 0+ |
1552 | ; ecx number of bytes to write, 0+ |
1551 | ; edx mem location to data |
1553 | ; edx mem location to data |
1552 | ; |
1554 | ; |
1553 | ; ret ebx = number of written bytes |
1555 | ; ret ebx = number of written bytes |
1554 | ; eax = 0 ok read or other = errormsg |
1556 | ; eax = 0 ok read or other = errormsg |
1555 | ; |
1557 | ; |
1556 | ;-------------------------------------------------------------- |
1558 | ;-------------------------------------------------------------- |
1557 | fshrad: |
1559 | fshrad: |
1558 | mov eax, ERROR_ACCESS_DENIED |
1560 | mov eax, ERROR_ACCESS_DENIED |
1559 | xor ebx, ebx |
1561 | xor ebx, ebx |
1560 | ret |
1562 | ret |
1561 | fshrfs: |
1563 | fshrfs: |
1562 | mov eax, ERROR_UNKNOWN_FS |
1564 | mov eax, ERROR_UNKNOWN_FS |
1563 | xor ebx, ebx |
1565 | xor ebx, ebx |
1564 | ret |
1566 | ret |
1565 | 1567 | ||
1566 | fs_HdCreateFolder: |
1568 | fs_HdCreateFolder: |
1567 | mov al, 1 |
1569 | mov al, 1 |
1568 | jmp fs_HdRewrite.common |
1570 | jmp fs_HdRewrite.common |
1569 | 1571 | ||
1570 | fs_HdRewrite: |
1572 | fs_HdRewrite: |
1571 | xor eax, eax |
1573 | xor eax, eax |
1572 | .common: |
1574 | .common: |
1573 | cmp [fs_type], 1 |
1575 | cmp [fs_type], 1 |
1574 | jz ntfs_HdRewrite |
1576 | jz ntfs_HdRewrite |
1575 | cmp [fs_type], 16 |
1577 | cmp [fs_type], 16 |
1576 | jz @f |
1578 | jz @f |
1577 | cmp [fs_type], 32 |
1579 | cmp [fs_type], 32 |
1578 | jnz fshrfs |
1580 | jnz fshrfs |
1579 | @@: |
1581 | @@: |
1580 | cmp byte [esi], 0 |
1582 | cmp byte [esi], 0 |
1581 | jz fshrad |
1583 | jz fshrad |
1582 | pushad |
1584 | pushad |
1583 | xor edi, edi |
1585 | xor edi, edi |
1584 | push esi |
1586 | push esi |
1585 | test ebp, ebp |
1587 | test ebp, ebp |
1586 | jz @f |
1588 | jz @f |
1587 | mov esi, ebp |
1589 | mov esi, ebp |
1588 | @@: |
1590 | @@: |
1589 | lodsb |
1591 | lodsb |
1590 | test al, al |
1592 | test al, al |
1591 | jz @f |
1593 | jz @f |
1592 | cmp al, '/' |
1594 | cmp al, '/' |
1593 | jnz @b |
1595 | jnz @b |
1594 | lea edi, [esi-1] |
1596 | lea edi, [esi-1] |
1595 | jmp @b |
1597 | jmp @b |
1596 | @@: |
1598 | @@: |
1597 | pop esi |
1599 | pop esi |
1598 | test edi, edi |
1600 | test edi, edi |
1599 | jnz .noroot |
1601 | jnz .noroot |
1600 | test ebp, ebp |
1602 | test ebp, ebp |
1601 | jnz .hasebp |
1603 | jnz .hasebp |
1602 | mov ebp, [ROOT_CLUSTER] |
1604 | mov ebp, [ROOT_CLUSTER] |
1603 | cmp [fs_type], 32 |
1605 | cmp [fs_type], 32 |
1604 | jz .pushnotroot |
1606 | jz .pushnotroot |
1605 | push fat16_root_extend_dir |
1607 | push fat16_root_extend_dir |
1606 | push fat16_root_end_write |
1608 | push fat16_root_end_write |
1607 | push fat16_root_next_write |
1609 | push fat16_root_next_write |
1608 | push fat16_root_begin_write |
1610 | push fat16_root_begin_write |
1609 | xor ebp, ebp |
1611 | xor ebp, ebp |
1610 | push ebp |
1612 | push ebp |
1611 | push ebp |
1613 | push ebp |
1612 | push fat16_root_first |
1614 | push fat16_root_first |
1613 | push fat16_root_next |
1615 | push fat16_root_next |
1614 | jmp .common1 |
1616 | jmp .common1 |
1615 | .hasebp: |
1617 | .hasebp: |
1616 | mov eax, ERROR_ACCESS_DENIED |
1618 | mov eax, ERROR_ACCESS_DENIED |
1617 | cmp byte [ebp], 0 |
1619 | cmp byte [ebp], 0 |
1618 | jz .ret1 |
1620 | jz .ret1 |
1619 | push ebp |
1621 | push ebp |
1620 | xor ebp, ebp |
1622 | xor ebp, ebp |
1621 | call hd_find_lfn |
1623 | call hd_find_lfn |
1622 | pop esi |
1624 | pop esi |
1623 | jc .notfound0 |
1625 | jc .notfound0 |
1624 | jmp .common0 |
1626 | jmp .common0 |
1625 | .noroot: |
1627 | .noroot: |
1626 | mov eax, ERROR_ACCESS_DENIED |
1628 | mov eax, ERROR_ACCESS_DENIED |
1627 | cmp byte [edi+1], 0 |
1629 | cmp byte [edi+1], 0 |
1628 | jz .ret1 |
1630 | jz .ret1 |
1629 | ; check existence |
1631 | ; check existence |
1630 | mov byte [edi], 0 |
1632 | mov byte [edi], 0 |
1631 | push edi |
1633 | push edi |
1632 | call hd_find_lfn |
1634 | call hd_find_lfn |
1633 | pop esi |
1635 | pop esi |
1634 | mov byte [esi], '/' |
1636 | mov byte [esi], '/' |
1635 | jnc @f |
1637 | jnc @f |
1636 | .notfound0: |
1638 | .notfound0: |
1637 | mov eax, ERROR_FILE_NOT_FOUND |
1639 | mov eax, ERROR_FILE_NOT_FOUND |
1638 | .ret1: |
1640 | .ret1: |
1639 | mov [esp+28], eax |
1641 | mov [esp+28], eax |
1640 | popad |
1642 | popad |
1641 | xor ebx, ebx |
1643 | xor ebx, ebx |
1642 | ret |
1644 | ret |
1643 | @@: |
1645 | @@: |
1644 | inc esi |
1646 | inc esi |
1645 | .common0: |
1647 | .common0: |
1646 | test byte [edi+11], 0x10 ; must be directory |
1648 | test byte [edi+11], 0x10 ; must be directory |
1647 | mov eax, ERROR_ACCESS_DENIED |
1649 | mov eax, ERROR_ACCESS_DENIED |
1648 | jz .ret1 |
1650 | jz .ret1 |
1649 | mov ebp, [edi+20-2] |
1651 | mov ebp, [edi+20-2] |
1650 | mov bp, [edi+26] ; ebp=cluster |
1652 | mov bp, [edi+26] ; ebp=cluster |
1651 | mov eax, ERROR_FAT_TABLE |
1653 | mov eax, ERROR_FAT_TABLE |
1652 | cmp ebp, 2 |
1654 | cmp ebp, 2 |
1653 | jb .ret1 |
1655 | jb .ret1 |
1654 | .pushnotroot: |
1656 | .pushnotroot: |
1655 | push fat_notroot_extend_dir |
1657 | push fat_notroot_extend_dir |
1656 | push fat_notroot_end_write |
1658 | push fat_notroot_end_write |
1657 | push fat_notroot_next_write |
1659 | push fat_notroot_next_write |
1658 | push fat_notroot_begin_write |
1660 | push fat_notroot_begin_write |
1659 | push 0 |
1661 | push 0 |
1660 | push ebp |
1662 | push ebp |
1661 | push fat_notroot_first |
1663 | push fat_notroot_first |
1662 | push fat_notroot_next |
1664 | push fat_notroot_next |
1663 | .common1: |
1665 | .common1: |
1664 | call fat_find_lfn |
1666 | call fat_find_lfn |
1665 | jc .notfound |
1667 | jc .notfound |
1666 | ; found |
1668 | ; found |
1667 | test byte [edi+11], 10h |
1669 | test byte [edi+11], 10h |
1668 | jz .exists_file |
1670 | jz .exists_file |
1669 | ; found directory; if we are creating directory, return OK, |
1671 | ; found directory; if we are creating directory, return OK, |
1670 | ; if we are creating file, say "access denied" |
1672 | ; if we are creating file, say "access denied" |
1671 | add esp, 32 |
1673 | add esp, 32 |
1672 | popad |
1674 | popad |
1673 | test al, al |
1675 | test al, al |
1674 | mov eax, ERROR_ACCESS_DENIED |
1676 | mov eax, ERROR_ACCESS_DENIED |
1675 | jz @f |
1677 | jz @f |
1676 | mov al, 0 |
1678 | mov al, 0 |
1677 | @@: |
1679 | @@: |
1678 | xor ebx, ebx |
1680 | xor ebx, ebx |
1679 | ret |
1681 | ret |
1680 | .exists_file: |
1682 | .exists_file: |
1681 | ; found file; if we are creating directory, return "access denied", |
1683 | ; found file; if we are creating directory, return "access denied", |
1682 | ; if we are creating file, delete existing file and continue |
1684 | ; if we are creating file, delete existing file and continue |
1683 | cmp byte [esp+32+28], 0 |
1685 | cmp byte [esp+32+28], 0 |
1684 | jz @f |
1686 | jz @f |
1685 | add esp, 32 |
1687 | add esp, 32 |
1686 | popad |
1688 | popad |
1687 | mov eax, ERROR_ACCESS_DENIED |
1689 | mov eax, ERROR_ACCESS_DENIED |
1688 | xor ebx, ebx |
1690 | xor ebx, ebx |
1689 | ret |
1691 | ret |
1690 | @@: |
1692 | @@: |
1691 | ; delete FAT chain |
1693 | ; delete FAT chain |
1692 | push edi |
1694 | push edi |
1693 | xor eax, eax |
1695 | xor eax, eax |
1694 | mov dword [edi+28], eax ; zero size |
1696 | mov dword [edi+28], eax ; zero size |
1695 | xor ecx, ecx |
1697 | xor ecx, ecx |
1696 | mov eax, [edi+20-2] |
1698 | mov eax, [edi+20-2] |
1697 | mov ax, [edi+26] |
1699 | mov ax, [edi+26] |
1698 | mov word [edi+20], cx |
1700 | mov word [edi+20], cx |
1699 | mov word [edi+26], cx |
1701 | mov word [edi+26], cx |
1700 | test eax, eax |
1702 | test eax, eax |
1701 | jz .done1 |
1703 | jz .done1 |
1702 | @@: |
1704 | @@: |
1703 | cmp eax, [fatRESERVED] |
1705 | cmp eax, [fatRESERVED] |
1704 | jae .done1 |
1706 | jae .done1 |
1705 | push edx |
1707 | push edx |
1706 | xor edx, edx |
1708 | xor edx, edx |
1707 | call set_FAT |
1709 | call set_FAT |
1708 | mov eax, edx |
1710 | mov eax, edx |
1709 | pop edx |
1711 | pop edx |
1710 | inc ecx |
1712 | inc ecx |
1711 | jmp @b |
1713 | jmp @b |
1712 | .done1: |
1714 | .done1: |
1713 | pop edi |
1715 | pop edi |
1714 | call get_time_for_file |
1716 | call get_time_for_file |
1715 | mov [edi+22], ax |
1717 | mov [edi+22], ax |
1716 | call get_date_for_file |
1718 | call get_date_for_file |
1717 | mov [edi+24], ax |
1719 | mov [edi+24], ax |
1718 | mov [edi+18], ax |
1720 | mov [edi+18], ax |
1719 | or byte [edi+11], 20h ; set 'archive' attribute |
1721 | or byte [edi+11], 20h ; set 'archive' attribute |
1720 | jmp .doit |
1722 | jmp .doit |
1721 | .notfound: |
1723 | .notfound: |
1722 | ; file is not found; generate short name |
1724 | ; file is not found; generate short name |
1723 | call fat_name_is_legal |
1725 | call fat_name_is_legal |
1724 | jc @f |
1726 | jc @f |
1725 | add esp, 32 |
1727 | add esp, 32 |
1726 | popad |
1728 | popad |
1727 | mov eax, ERROR_FILE_NOT_FOUND |
1729 | mov eax, ERROR_FILE_NOT_FOUND |
1728 | xor ebx, ebx |
1730 | xor ebx, ebx |
1729 | ret |
1731 | ret |
1730 | @@: |
1732 | @@: |
1731 | sub esp, 12 |
1733 | sub esp, 12 |
1732 | mov edi, esp |
1734 | mov edi, esp |
1733 | call fat_gen_short_name |
1735 | call fat_gen_short_name |
1734 | .test_short_name_loop: |
1736 | .test_short_name_loop: |
1735 | push esi edi ecx |
1737 | push esi edi ecx |
1736 | mov esi, edi |
1738 | mov esi, edi |
1737 | lea eax, [esp+12+12+8] |
1739 | lea eax, [esp+12+12+8] |
1738 | mov [eax], ebp |
1740 | mov [eax], ebp |
1739 | and dword [eax+4], 0 |
1741 | and dword [eax+4], 0 |
1740 | call dword [eax-4] |
1742 | call dword [eax-4] |
1741 | jc .found |
1743 | jc .found |
1742 | .test_short_name_entry: |
1744 | .test_short_name_entry: |
1743 | cmp byte [edi+11], 0xF |
1745 | cmp byte [edi+11], 0xF |
1744 | jz .test_short_name_cont |
1746 | jz .test_short_name_cont |
1745 | mov ecx, 11 |
1747 | mov ecx, 11 |
1746 | push esi edi |
1748 | push esi edi |
1747 | repz cmpsb |
1749 | repz cmpsb |
1748 | pop edi esi |
1750 | pop edi esi |
1749 | jz .short_name_found |
1751 | jz .short_name_found |
1750 | .test_short_name_cont: |
1752 | .test_short_name_cont: |
1751 | lea eax, [esp+12+12+8] |
1753 | lea eax, [esp+12+12+8] |
1752 | call dword [eax-8] |
1754 | call dword [eax-8] |
1753 | jnc .test_short_name_entry |
1755 | jnc .test_short_name_entry |
1754 | jmp .found |
1756 | jmp .found |
1755 | .short_name_found: |
1757 | .short_name_found: |
1756 | pop ecx edi esi |
1758 | pop ecx edi esi |
1757 | call fat_next_short_name |
1759 | call fat_next_short_name |
1758 | jnc .test_short_name_loop |
1760 | jnc .test_short_name_loop |
1759 | .disk_full: |
1761 | .disk_full: |
1760 | add esp, 12+32 |
1762 | add esp, 12+32 |
1761 | popa |
1763 | popa |
1762 | mov eax, ERROR_DISK_FULL |
1764 | mov eax, ERROR_DISK_FULL |
1763 | xor ebx, ebx |
1765 | xor ebx, ebx |
1764 | ret |
1766 | ret |
1765 | .found: |
1767 | .found: |
1766 | pop ecx edi esi |
1768 | pop ecx edi esi |
1767 | ; now find space in directory |
1769 | ; now find space in directory |
1768 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
1770 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
1769 | mov al, '~' |
1771 | mov al, '~' |
1770 | push ecx edi |
1772 | push ecx edi |
1771 | mov ecx, 8 |
1773 | mov ecx, 8 |
1772 | repnz scasb |
1774 | repnz scasb |
1773 | push 1 |
1775 | push 1 |
1774 | pop eax ; 1 entry |
1776 | pop eax ; 1 entry |
1775 | jnz .notilde |
1777 | jnz .notilde |
1776 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
1778 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
1777 | xor eax, eax |
1779 | xor eax, eax |
1778 | @@: |
1780 | @@: |
1779 | cmp byte [esi], 0 |
1781 | cmp byte [esi], 0 |
1780 | jz @f |
1782 | jz @f |
1781 | inc esi |
1783 | inc esi |
1782 | inc eax |
1784 | inc eax |
1783 | jmp @b |
1785 | jmp @b |
1784 | @@: |
1786 | @@: |
1785 | sub esi, eax |
1787 | sub esi, eax |
1786 | add eax, 12+13 |
1788 | add eax, 12+13 |
1787 | mov ecx, 13 |
1789 | mov ecx, 13 |
1788 | push edx |
1790 | push edx |
1789 | cdq |
1791 | cdq |
1790 | div ecx |
1792 | div ecx |
1791 | pop edx |
1793 | pop edx |
1792 | .notilde: |
1794 | .notilde: |
1793 | push -1 |
1795 | push -1 |
1794 | push -1 |
1796 | push -1 |
1795 | push -1 |
1797 | push -1 |
1796 | ; find |
1798 | ; find |
1797 | xor ecx, ecx |
1799 | xor ecx, ecx |
1798 | push eax |
1800 | push eax |
1799 | lea eax, [esp+16+8+12+8] |
1801 | lea eax, [esp+16+8+12+8] |
1800 | mov [eax], ebp |
1802 | mov [eax], ebp |
1801 | and dword [eax+4], 0 |
1803 | and dword [eax+4], 0 |
1802 | call dword [eax-4] |
1804 | call dword [eax-4] |
1803 | pop eax |
1805 | pop eax |
1804 | jnc .scan_dir |
1806 | jnc .scan_dir |
1805 | .fsfrfe3: |
1807 | .fsfrfe3: |
1806 | add esp, 12+8+12+32 |
1808 | add esp, 12+8+12+32 |
1807 | popad |
1809 | popad |
1808 | mov eax, 11 |
1810 | mov eax, 11 |
1809 | xor ebx, ebx |
1811 | xor ebx, ebx |
1810 | ret |
1812 | ret |
1811 | .scan_dir: |
1813 | .scan_dir: |
1812 | cmp byte [edi], 0 |
1814 | cmp byte [edi], 0 |
1813 | jz .free |
1815 | jz .free |
1814 | cmp byte [edi], 0xE5 |
1816 | cmp byte [edi], 0xE5 |
1815 | jz .free |
1817 | jz .free |
1816 | xor ecx, ecx |
1818 | xor ecx, ecx |
1817 | .scan_cont: |
1819 | .scan_cont: |
1818 | push eax |
1820 | push eax |
1819 | lea eax, [esp+16+8+12+8] |
1821 | lea eax, [esp+16+8+12+8] |
1820 | call dword [eax-8] |
1822 | call dword [eax-8] |
1821 | pop eax |
1823 | pop eax |
1822 | jnc .scan_dir |
1824 | jnc .scan_dir |
1823 | cmp [hd_error], 0 |
1825 | cmp [hd_error], 0 |
1824 | jnz .fsfrfe3 |
1826 | jnz .fsfrfe3 |
1825 | push eax |
1827 | push eax |
1826 | lea eax, [esp+16+8+12+8] |
1828 | lea eax, [esp+16+8+12+8] |
1827 | call dword [eax+20] ; extend directory |
1829 | call dword [eax+20] ; extend directory |
1828 | pop eax |
1830 | pop eax |
1829 | jnc .scan_dir |
1831 | jnc .scan_dir |
1830 | add esp, 12+8+12+32 |
1832 | add esp, 12+8+12+32 |
1831 | popad |
1833 | popad |
1832 | mov eax, ERROR_DISK_FULL |
1834 | mov eax, ERROR_DISK_FULL |
1833 | xor ebx, ebx |
1835 | xor ebx, ebx |
1834 | ret |
1836 | ret |
1835 | .free: |
1837 | .free: |
1836 | test ecx, ecx |
1838 | test ecx, ecx |
1837 | jnz @f |
1839 | jnz @f |
1838 | mov [esp], edi |
1840 | mov [esp], edi |
1839 | mov ecx, [esp+12+8+12+8] |
1841 | mov ecx, [esp+12+8+12+8] |
1840 | mov [esp+4], ecx |
1842 | mov [esp+4], ecx |
1841 | mov ecx, [esp+12+8+12+12] |
1843 | mov ecx, [esp+12+8+12+12] |
1842 | mov [esp+8], ecx |
1844 | mov [esp+8], ecx |
1843 | xor ecx, ecx |
1845 | xor ecx, ecx |
1844 | @@: |
1846 | @@: |
1845 | inc ecx |
1847 | inc ecx |
1846 | cmp ecx, eax |
1848 | cmp ecx, eax |
1847 | jb .scan_cont |
1849 | jb .scan_cont |
1848 | ; found! |
1850 | ; found! |
1849 | ; calculate name checksum |
1851 | ; calculate name checksum |
1850 | push esi ecx |
1852 | push esi ecx |
1851 | mov esi, [esp+8+12] |
1853 | mov esi, [esp+8+12] |
1852 | mov ecx, 11 |
1854 | mov ecx, 11 |
1853 | xor eax, eax |
1855 | xor eax, eax |
1854 | @@: |
1856 | @@: |
1855 | ror al, 1 |
1857 | ror al, 1 |
1856 | add al, [esi] |
1858 | add al, [esi] |
1857 | inc esi |
1859 | inc esi |
1858 | loop @b |
1860 | loop @b |
1859 | pop ecx esi |
1861 | pop ecx esi |
1860 | pop edi |
1862 | pop edi |
1861 | pop dword [esp+8+12+12] |
1863 | pop dword [esp+8+12+12] |
1862 | pop dword [esp+8+12+12] |
1864 | pop dword [esp+8+12+12] |
1863 | ; edi points to first entry in free chunk |
1865 | ; edi points to first entry in free chunk |
1864 | dec ecx |
1866 | dec ecx |
1865 | jz .nolfn |
1867 | jz .nolfn |
1866 | push esi |
1868 | push esi |
1867 | push eax |
1869 | push eax |
1868 | lea eax, [esp+8+8+12+8] |
1870 | lea eax, [esp+8+8+12+8] |
1869 | call dword [eax+8] ; begin write |
1871 | call dword [eax+8] ; begin write |
1870 | mov al, 40h |
1872 | mov al, 40h |
1871 | .writelfn: |
1873 | .writelfn: |
1872 | or al, cl |
1874 | or al, cl |
1873 | mov esi, [esp+4] |
1875 | mov esi, [esp+4] |
1874 | push ecx |
1876 | push ecx |
1875 | dec ecx |
1877 | dec ecx |
1876 | imul ecx, 13 |
1878 | imul ecx, 13 |
1877 | add esi, ecx |
1879 | add esi, ecx |
1878 | stosb |
1880 | stosb |
1879 | mov cl, 5 |
1881 | mov cl, 5 |
1880 | call fs_RamdiskRewrite.read_symbols |
1882 | call fs_RamdiskRewrite.read_symbols |
1881 | mov ax, 0xF |
1883 | mov ax, 0xF |
1882 | stosw |
1884 | stosw |
1883 | mov al, [esp+4] |
1885 | mov al, [esp+4] |
1884 | stosb |
1886 | stosb |
1885 | mov cl, 6 |
1887 | mov cl, 6 |
1886 | call fs_RamdiskRewrite.read_symbols |
1888 | call fs_RamdiskRewrite.read_symbols |
1887 | xor eax, eax |
1889 | xor eax, eax |
1888 | stosw |
1890 | stosw |
1889 | mov cl, 2 |
1891 | mov cl, 2 |
1890 | call fs_RamdiskRewrite.read_symbols |
1892 | call fs_RamdiskRewrite.read_symbols |
1891 | pop ecx |
1893 | pop ecx |
1892 | lea eax, [esp+8+8+12+8] |
1894 | lea eax, [esp+8+8+12+8] |
1893 | call dword [eax+12] ; next write |
1895 | call dword [eax+12] ; next write |
1894 | xor eax, eax |
1896 | xor eax, eax |
1895 | loop .writelfn |
1897 | loop .writelfn |
1896 | pop eax |
1898 | pop eax |
1897 | pop esi |
1899 | pop esi |
1898 | ; lea eax, [esp+8+12+8] |
1900 | ; lea eax, [esp+8+12+8] |
1899 | ; call dword [eax+16] ; end write |
1901 | ; call dword [eax+16] ; end write |
1900 | .nolfn: |
1902 | .nolfn: |
1901 | xchg esi, [esp] |
1903 | xchg esi, [esp] |
1902 | mov ecx, 11 |
1904 | mov ecx, 11 |
1903 | rep movsb |
1905 | rep movsb |
1904 | mov word [edi], 20h ; attributes |
1906 | mov word [edi], 20h ; attributes |
1905 | sub edi, 11 |
1907 | sub edi, 11 |
1906 | pop esi ecx |
1908 | pop esi ecx |
1907 | add esp, 12 |
1909 | add esp, 12 |
1908 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
1910 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
1909 | call get_time_for_file |
1911 | call get_time_for_file |
1910 | mov [edi+14], ax ; creation time |
1912 | mov [edi+14], ax ; creation time |
1911 | mov [edi+22], ax ; last write time |
1913 | mov [edi+22], ax ; last write time |
1912 | call get_date_for_file |
1914 | call get_date_for_file |
1913 | mov [edi+16], ax ; creation date |
1915 | mov [edi+16], ax ; creation date |
1914 | mov [edi+24], ax ; last write date |
1916 | mov [edi+24], ax ; last write date |
1915 | mov [edi+18], ax ; last access date |
1917 | mov [edi+18], ax ; last access date |
1916 | xor ecx, ecx |
1918 | xor ecx, ecx |
1917 | mov word [edi+20], cx ; high word of cluster |
1919 | mov word [edi+20], cx ; high word of cluster |
1918 | mov word [edi+26], cx ; low word of cluster - to be filled |
1920 | mov word [edi+26], cx ; low word of cluster - to be filled |
1919 | mov dword [edi+28], ecx ; file size - to be filled |
1921 | mov dword [edi+28], ecx ; file size - to be filled |
1920 | cmp byte [esp+32+28], cl |
1922 | cmp byte [esp+32+28], cl |
1921 | jz .doit |
1923 | jz .doit |
1922 | ; create directory |
1924 | ; create directory |
1923 | mov byte [edi+11], 10h ; attributes: folder |
1925 | mov byte [edi+11], 10h ; attributes: folder |
1924 | mov edx, edi |
1926 | mov edx, edi |
1925 | lea eax, [esp+8] |
1927 | lea eax, [esp+8] |
1926 | call dword [eax+16] ; flush directory |
1928 | call dword [eax+16] ; flush directory |
1927 | push ecx |
1929 | push ecx |
1928 | mov ecx, [SECTORS_PER_CLUSTER] |
1930 | mov ecx, [SECTORS_PER_CLUSTER] |
1929 | shl ecx, 9 |
1931 | shl ecx, 9 |
1930 | jmp .doit2 |
1932 | jmp .doit2 |
1931 | .doit: |
1933 | .doit: |
1932 | lea eax, [esp+8] |
1934 | lea eax, [esp+8] |
1933 | call dword [eax+16] ; flush directory |
1935 | call dword [eax+16] ; flush directory |
1934 | push ecx |
1936 | push ecx |
1935 | mov ecx, [esp+4+32+24] |
1937 | mov ecx, [esp+4+32+24] |
1936 | .doit2: |
1938 | .doit2: |
1937 | push ecx |
1939 | push ecx |
1938 | push edi |
1940 | push edi |
1939 | mov esi, edx |
1941 | mov esi, edx |
1940 | test ecx, ecx |
1942 | test ecx, ecx |
1941 | jz .done |
1943 | jz .done |
1942 | mov eax, 2 |
1944 | mov eax, 2 |
1943 | call get_free_FAT |
1945 | call get_free_FAT |
1944 | jc .diskfull |
1946 | jc .diskfull |
1945 | push eax |
1947 | push eax |
1946 | mov [edi+26], ax |
1948 | mov [edi+26], ax |
1947 | shr eax, 16 |
1949 | shr eax, 16 |
1948 | mov [edi+20], ax |
1950 | mov [edi+20], ax |
1949 | lea eax, [esp+16+8] |
1951 | lea eax, [esp+16+8] |
1950 | call dword [eax+16] ; flush directory |
1952 | call dword [eax+16] ; flush directory |
1951 | pop eax |
1953 | pop eax |
1952 | push edx |
1954 | push edx |
1953 | mov edx, [fatEND] |
1955 | mov edx, [fatEND] |
1954 | call set_FAT |
1956 | call set_FAT |
1955 | pop edx |
1957 | pop edx |
1956 | .write_cluster: |
1958 | .write_cluster: |
1957 | push eax |
1959 | push eax |
1958 | dec eax |
1960 | dec eax |
1959 | dec eax |
1961 | dec eax |
1960 | mov ebp, [SECTORS_PER_CLUSTER] |
1962 | mov ebp, [SECTORS_PER_CLUSTER] |
1961 | imul eax, ebp |
1963 | imul eax, ebp |
1962 | add eax, [DATA_START] |
1964 | add eax, [DATA_START] |
1963 | ; write data |
1965 | ; write data |
1964 | .write_sector: |
1966 | .write_sector: |
1965 | cmp byte [esp+16+32+28], 0 |
1967 | cmp byte [esp+16+32+28], 0 |
1966 | jnz .writedir |
1968 | jnz .writedir |
1967 | mov ecx, 512 |
1969 | mov ecx, 512 |
1968 | cmp dword [esp+8], ecx |
1970 | cmp dword [esp+8], ecx |
1969 | jb .writeshort |
1971 | jb .writeshort |
1970 | ; we can write directly from given buffer |
1972 | ; we can write directly from given buffer |
1971 | mov ebx, esi |
1973 | mov ebx, esi |
1972 | add esi, ecx |
1974 | add esi, ecx |
1973 | jmp .writecommon |
1975 | jmp .writecommon |
1974 | .writeshort: |
1976 | .writeshort: |
1975 | mov ecx, [esp+8] |
1977 | mov ecx, [esp+8] |
1976 | push ecx |
1978 | push ecx |
1977 | mov edi, buffer |
1979 | mov edi, buffer |
1978 | mov ebx, edi |
1980 | mov ebx, edi |
1979 | rep movsb |
1981 | rep movsb |
1980 | .writedircont: |
1982 | .writedircont: |
1981 | mov ecx, buffer+0x200 |
1983 | mov ecx, buffer+0x200 |
1982 | sub ecx, edi |
1984 | sub ecx, edi |
1983 | push eax |
1985 | push eax |
1984 | xor eax, eax |
1986 | xor eax, eax |
1985 | rep stosb |
1987 | rep stosb |
1986 | pop eax |
1988 | pop eax |
1987 | pop ecx |
1989 | pop ecx |
1988 | .writecommon: |
1990 | .writecommon: |
1989 | call hd_write |
1991 | call hd_write |
1990 | cmp [hd_error], 0 |
1992 | cmp [hd_error], 0 |
1991 | jnz .writeerr |
1993 | jnz .writeerr |
1992 | inc eax |
1994 | inc eax |
1993 | sub dword [esp+8], ecx |
1995 | sub dword [esp+8], ecx |
1994 | jz .writedone |
1996 | jz .writedone |
1995 | dec ebp |
1997 | dec ebp |
1996 | jnz .write_sector |
1998 | jnz .write_sector |
1997 | ; allocate new cluster |
1999 | ; allocate new cluster |
1998 | pop eax |
2000 | pop eax |
1999 | mov ecx, eax |
2001 | mov ecx, eax |
2000 | call get_free_FAT |
2002 | call get_free_FAT |
2001 | jc .diskfull |
2003 | jc .diskfull |
2002 | push edx |
2004 | push edx |
2003 | mov edx, [fatEND] |
2005 | mov edx, [fatEND] |
2004 | call set_FAT |
2006 | call set_FAT |
2005 | xchg eax, ecx |
2007 | xchg eax, ecx |
2006 | mov edx, ecx |
2008 | mov edx, ecx |
2007 | call set_FAT |
2009 | call set_FAT |
2008 | pop edx |
2010 | pop edx |
2009 | xchg eax, ecx |
2011 | xchg eax, ecx |
2010 | jmp .write_cluster |
2012 | jmp .write_cluster |
2011 | .diskfull: |
2013 | .diskfull: |
2012 | mov eax, ERROR_DISK_FULL |
2014 | mov eax, ERROR_DISK_FULL |
2013 | jmp .ret |
2015 | jmp .ret |
2014 | .writeerr: |
2016 | .writeerr: |
2015 | pop eax |
2017 | pop eax |
2016 | sub esi, ecx |
2018 | sub esi, ecx |
2017 | mov eax, 11 |
2019 | mov eax, 11 |
2018 | jmp .ret |
2020 | jmp .ret |
2019 | .writedone: |
2021 | .writedone: |
2020 | pop eax |
2022 | pop eax |
2021 | .done: |
2023 | .done: |
2022 | xor eax, eax |
2024 | xor eax, eax |
2023 | .ret: |
2025 | .ret: |
2024 | pop edi ecx |
2026 | pop edi ecx |
2025 | mov ebx, esi |
2027 | mov ebx, esi |
2026 | sub ebx, edx |
2028 | sub ebx, edx |
2027 | pop ebp |
2029 | pop ebp |
2028 | mov [esp+32+28], eax |
2030 | mov [esp+32+28], eax |
2029 | lea eax, [esp+8] |
2031 | lea eax, [esp+8] |
2030 | call dword [eax+8] |
2032 | call dword [eax+8] |
2031 | mov [edi+28], ebx |
2033 | mov [edi+28], ebx |
2032 | call dword [eax+16] |
2034 | call dword [eax+16] |
2033 | mov [esp+32+16], ebx |
2035 | mov [esp+32+16], ebx |
2034 | lea eax, [ebx+511] |
2036 | lea eax, [ebx+511] |
2035 | shr eax, 9 |
2037 | shr eax, 9 |
2036 | mov ecx, [SECTORS_PER_CLUSTER] |
2038 | mov ecx, [SECTORS_PER_CLUSTER] |
2037 | lea eax, [eax+ecx-1] |
2039 | lea eax, [eax+ecx-1] |
2038 | xor edx, edx |
2040 | xor edx, edx |
2039 | div ecx |
2041 | div ecx |
2040 | mov ecx, ebp |
2042 | mov ecx, ebp |
2041 | sub ecx, eax |
2043 | sub ecx, eax |
2042 | call add_disk_free_space |
2044 | call add_disk_free_space |
2043 | add esp, 32 |
2045 | add esp, 32 |
2044 | call update_disk |
2046 | call update_disk |
2045 | popad |
2047 | popad |
2046 | ret |
2048 | ret |
2047 | .writedir: |
2049 | .writedir: |
2048 | push 512 |
2050 | push 512 |
2049 | mov edi, buffer |
2051 | mov edi, buffer |
2050 | mov ebx, edi |
2052 | mov ebx, edi |
2051 | mov ecx, [SECTORS_PER_CLUSTER] |
2053 | mov ecx, [SECTORS_PER_CLUSTER] |
2052 | shl ecx, 9 |
2054 | shl ecx, 9 |
2053 | cmp ecx, [esp+12] |
2055 | cmp ecx, [esp+12] |
2054 | jnz .writedircont |
2056 | jnz .writedircont |
2055 | dec dword [esp+16] |
2057 | dec dword [esp+16] |
2056 | push esi |
2058 | push esi |
2057 | mov ecx, 32/4 |
2059 | mov ecx, 32/4 |
2058 | rep movsd |
2060 | rep movsd |
2059 | pop esi |
2061 | pop esi |
2060 | mov dword [edi-32], '. ' |
2062 | mov dword [edi-32], '. ' |
2061 | mov dword [edi-32+4], ' ' |
2063 | mov dword [edi-32+4], ' ' |
2062 | mov dword [edi-32+8], ' ' |
2064 | mov dword [edi-32+8], ' ' |
2063 | mov byte [edi-32+11], 10h |
2065 | mov byte [edi-32+11], 10h |
2064 | push esi |
2066 | push esi |
2065 | mov ecx, 32/4 |
2067 | mov ecx, 32/4 |
2066 | rep movsd |
2068 | rep movsd |
2067 | pop esi |
2069 | pop esi |
2068 | mov dword [edi-32], '.. ' |
2070 | mov dword [edi-32], '.. ' |
2069 | mov dword [edi-32+4], ' ' |
2071 | mov dword [edi-32+4], ' ' |
2070 | mov dword [edi-32+8], ' ' |
2072 | mov dword [edi-32+8], ' ' |
2071 | mov byte [edi-32+11], 10h |
2073 | mov byte [edi-32+11], 10h |
2072 | mov ecx, [esp+20+8] |
2074 | mov ecx, [esp+20+8] |
2073 | cmp ecx, [ROOT_CLUSTER] |
2075 | cmp ecx, [ROOT_CLUSTER] |
2074 | jnz @f |
2076 | jnz @f |
2075 | xor ecx, ecx |
2077 | xor ecx, ecx |
2076 | @@: |
2078 | @@: |
2077 | mov word [edi-32+26], cx |
2079 | mov word [edi-32+26], cx |
2078 | shr ecx, 16 |
2080 | shr ecx, 16 |
2079 | mov [edi-32+20], cx |
2081 | mov [edi-32+20], cx |
2080 | jmp .writedircont |
2082 | jmp .writedircont |
2081 | 2083 | ||
2082 | ;---------------------------------------------------------------- |
2084 | ;---------------------------------------------------------------- |
2083 | ; |
2085 | ; |
2084 | ; fs_HdWrite - LFN variant for writing to hard disk |
2086 | ; fs_HdWrite - LFN variant for writing to hard disk |
2085 | ; |
2087 | ; |
2086 | ; esi points to filename |
2088 | ; esi points to filename |
2087 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
2089 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
2088 | ; may be ebx=0 - start from first byte |
2090 | ; may be ebx=0 - start from first byte |
2089 | ; ecx number of bytes to write, 0+ |
2091 | ; ecx number of bytes to write, 0+ |
2090 | ; edx mem location to data |
2092 | ; edx mem location to data |
2091 | ; |
2093 | ; |
2092 | ; ret ebx = bytes written (maybe 0) |
2094 | ; ret ebx = bytes written (maybe 0) |
2093 | ; eax = 0 ok write or other = errormsg |
2095 | ; eax = 0 ok write or other = errormsg |
2094 | ; |
2096 | ; |
2095 | ;-------------------------------------------------------------- |
2097 | ;-------------------------------------------------------------- |
2096 | fs_HdWrite.access_denied: |
2098 | fs_HdWrite.access_denied: |
2097 | push ERROR_ACCESS_DENIED |
2099 | push ERROR_ACCESS_DENIED |
2098 | fs_HdWrite.ret0: |
2100 | fs_HdWrite.ret0: |
2099 | pop eax |
2101 | pop eax |
2100 | xor ebx, ebx |
2102 | xor ebx, ebx |
2101 | ret |
2103 | ret |
2102 | 2104 | ||
2103 | fs_HdWrite.ret11: |
2105 | fs_HdWrite.ret11: |
2104 | push 11 |
2106 | push 11 |
2105 | jmp fs_HdWrite.ret0 |
2107 | jmp fs_HdWrite.ret0 |
2106 | 2108 | ||
2107 | fs_HdWrite: |
2109 | fs_HdWrite: |
2108 | cmp [fs_type], 1 |
2110 | cmp [fs_type], 1 |
2109 | jz ntfs_HdWrite |
2111 | jz ntfs_HdWrite |
2110 | cmp [fs_type], 16 |
2112 | cmp [fs_type], 16 |
2111 | jz @f |
2113 | jz @f |
2112 | cmp [fs_type], 32 |
2114 | cmp [fs_type], 32 |
2113 | jz @f |
2115 | jz @f |
2114 | push ERROR_UNKNOWN_FS |
2116 | push ERROR_UNKNOWN_FS |
2115 | jmp .ret0 |
2117 | jmp .ret0 |
2116 | @@: |
2118 | @@: |
2117 | cmp byte [esi], 0 |
2119 | cmp byte [esi], 0 |
2118 | jz .access_denied |
2120 | jz .access_denied |
2119 | pushad |
2121 | pushad |
2120 | call hd_find_lfn |
2122 | call hd_find_lfn |
2121 | pushfd |
2123 | pushfd |
2122 | cmp [hd_error], 0 |
2124 | cmp [hd_error], 0 |
2123 | jz @f |
2125 | jz @f |
2124 | popfd |
2126 | popfd |
2125 | popad |
2127 | popad |
2126 | push 11 |
2128 | push 11 |
2127 | jmp .ret0 |
2129 | jmp .ret0 |
2128 | @@: |
2130 | @@: |
2129 | popfd |
2131 | popfd |
2130 | jnc .found |
2132 | jnc .found |
2131 | popad |
2133 | popad |
2132 | push ERROR_FILE_NOT_FOUND |
2134 | push ERROR_FILE_NOT_FOUND |
2133 | jmp .ret0 |
2135 | jmp .ret0 |
2134 | .found: |
2136 | .found: |
2135 | ; FAT does not support files larger than 4GB |
2137 | ; FAT does not support files larger than 4GB |
2136 | test ebx, ebx |
2138 | test ebx, ebx |
2137 | jz .l1 |
2139 | jz .l1 |
2138 | cmp dword [ebx+4], 0 |
2140 | cmp dword [ebx+4], 0 |
2139 | jz @f |
2141 | jz @f |
2140 | .eof: |
2142 | .eof: |
2141 | popad |
2143 | popad |
2142 | push ERROR_END_OF_FILE |
2144 | push ERROR_END_OF_FILE |
2143 | jmp .ret0 |
2145 | jmp .ret0 |
2144 | @@: |
2146 | @@: |
2145 | mov ebx, [ebx] |
2147 | mov ebx, [ebx] |
2146 | .l1: |
2148 | .l1: |
2147 | ; now edi points to direntry, ebx=start byte to write, |
2149 | ; now edi points to direntry, ebx=start byte to write, |
2148 | ; ecx=number of bytes to write, edx=data pointer |
2150 | ; ecx=number of bytes to write, edx=data pointer |
2149 | 2151 | ||
2150 | ; extend file if needed |
2152 | ; extend file if needed |
2151 | add ecx, ebx |
2153 | add ecx, ebx |
2152 | jc .eof ; FAT does not support files larger than 4GB |
2154 | jc .eof ; FAT does not support files larger than 4GB |
2153 | push eax ; save directory sector |
2155 | push eax ; save directory sector |
2154 | push 0 ; return value=0 |
2156 | push 0 ; return value=0 |
2155 | 2157 | ||
2156 | call get_time_for_file |
2158 | call get_time_for_file |
2157 | mov [edi+22], ax ; last write time |
2159 | mov [edi+22], ax ; last write time |
2158 | call get_date_for_file |
2160 | call get_date_for_file |
2159 | mov [edi+24], ax ; last write date |
2161 | mov [edi+24], ax ; last write date |
2160 | mov [edi+18], ax ; last access date |
2162 | mov [edi+18], ax ; last access date |
2161 | 2163 | ||
2162 | push dword [edi+28] ; save current file size |
2164 | push dword [edi+28] ; save current file size |
2163 | cmp ecx, [edi+28] |
2165 | cmp ecx, [edi+28] |
2164 | jbe .length_ok |
2166 | jbe .length_ok |
2165 | cmp ecx, ebx |
2167 | cmp ecx, ebx |
2166 | jz .length_ok |
2168 | jz .length_ok |
2167 | call hd_extend_file |
2169 | call hd_extend_file |
2168 | jnc .length_ok |
2170 | jnc .length_ok |
2169 | mov [esp+4], eax |
2171 | mov [esp+4], eax |
2170 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
2172 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
2171 | ; First two cases are fatal errors, in third case we may write some data |
2173 | ; First two cases are fatal errors, in third case we may write some data |
2172 | cmp al, ERROR_DISK_FULL |
2174 | cmp al, ERROR_DISK_FULL |
2173 | jz .disk_full |
2175 | jz .disk_full |
2174 | pop eax |
2176 | pop eax |
2175 | pop eax |
2177 | pop eax |
2176 | mov [esp+4+28], eax |
2178 | mov [esp+4+28], eax |
2177 | pop eax |
2179 | pop eax |
2178 | popad |
2180 | popad |
2179 | xor ebx, ebx |
2181 | xor ebx, ebx |
2180 | ret |
2182 | ret |
2181 | .disk_full: |
2183 | .disk_full: |
2182 | ; correct number of bytes to write |
2184 | ; correct number of bytes to write |
2183 | mov ecx, [edi+28] |
2185 | mov ecx, [edi+28] |
2184 | cmp ecx, ebx |
2186 | cmp ecx, ebx |
2185 | ja .length_ok |
2187 | ja .length_ok |
2186 | .ret: |
2188 | .ret: |
2187 | call update_disk |
2189 | call update_disk |
2188 | cmp [hd_error], 0 |
2190 | cmp [hd_error], 0 |
2189 | jz @f |
2191 | jz @f |
2190 | mov byte [esp+4], 11 |
2192 | mov byte [esp+4], 11 |
2191 | @@: |
2193 | @@: |
2192 | pop eax |
2194 | pop eax |
2193 | pop eax |
2195 | pop eax |
2194 | mov [esp+4+28], eax ; eax=return value |
2196 | mov [esp+4+28], eax ; eax=return value |
2195 | pop eax |
2197 | pop eax |
2196 | sub edx, [esp+20] |
2198 | sub edx, [esp+20] |
2197 | mov [esp+16], edx ; ebx=number of written bytes |
2199 | mov [esp+16], edx ; ebx=number of written bytes |
2198 | popad |
2200 | popad |
2199 | ret |
2201 | ret |
2200 | .length_ok: |
2202 | .length_ok: |
2201 | mov esi, [edi+28] |
2203 | mov esi, [edi+28] |
2202 | mov eax, [edi+20-2] |
2204 | mov eax, [edi+20-2] |
2203 | mov ax, [edi+26] |
2205 | mov ax, [edi+26] |
2204 | mov edi, eax ; edi=current cluster |
2206 | mov edi, eax ; edi=current cluster |
2205 | xor ebp, ebp ; ebp=current sector in cluster |
2207 | xor ebp, ebp ; ebp=current sector in cluster |
2206 | ; save directory |
2208 | ; save directory |
2207 | mov eax, [esp+8] |
2209 | mov eax, [esp+8] |
2208 | push ebx |
2210 | push ebx |
2209 | mov ebx, buffer |
2211 | mov ebx, buffer |
2210 | call hd_write |
2212 | call hd_write |
2211 | pop ebx |
2213 | pop ebx |
2212 | cmp [hd_error], 0 |
2214 | cmp [hd_error], 0 |
2213 | jz @f |
2215 | jz @f |
2214 | .device_err: |
2216 | .device_err: |
2215 | mov byte [esp+4], 11 |
2217 | mov byte [esp+4], 11 |
2216 | jmp .ret |
2218 | jmp .ret |
2217 | @@: |
2219 | @@: |
2218 | 2220 | ||
2219 | ; now ebx=start pos, ecx=end pos, both lie inside file |
2221 | ; now ebx=start pos, ecx=end pos, both lie inside file |
2220 | sub ecx, ebx |
2222 | sub ecx, ebx |
2221 | jz .ret |
2223 | jz .ret |
2222 | .write_loop: |
2224 | .write_loop: |
2223 | ; skip unmodified sectors |
2225 | ; skip unmodified sectors |
2224 | cmp dword [esp], 0x200 |
2226 | cmp dword [esp], 0x200 |
2225 | jb .modify |
2227 | jb .modify |
2226 | sub ebx, 0x200 |
2228 | sub ebx, 0x200 |
2227 | jae .skip |
2229 | jae .skip |
2228 | add ebx, 0x200 |
2230 | add ebx, 0x200 |
2229 | .modify: |
2231 | .modify: |
2230 | ; get length of data in current sector |
2232 | ; get length of data in current sector |
2231 | push ecx |
2233 | push ecx |
2232 | sub ebx, 0x200 |
2234 | sub ebx, 0x200 |
2233 | jb .hasdata |
2235 | jb .hasdata |
2234 | neg ebx |
2236 | neg ebx |
2235 | xor ecx, ecx |
2237 | xor ecx, ecx |
2236 | jmp @f |
2238 | jmp @f |
2237 | .hasdata: |
2239 | .hasdata: |
2238 | neg ebx |
2240 | neg ebx |
2239 | cmp ecx, ebx |
2241 | cmp ecx, ebx |
2240 | jbe @f |
2242 | jbe @f |
2241 | mov ecx, ebx |
2243 | mov ecx, ebx |
2242 | @@: |
2244 | @@: |
2243 | ; get current sector number |
2245 | ; get current sector number |
2244 | mov eax, edi |
2246 | mov eax, edi |
2245 | dec eax |
2247 | dec eax |
2246 | dec eax |
2248 | dec eax |
2247 | imul eax, [SECTORS_PER_CLUSTER] |
2249 | imul eax, [SECTORS_PER_CLUSTER] |
2248 | add eax, [DATA_START] |
2250 | add eax, [DATA_START] |
2249 | add eax, ebp |
2251 | add eax, ebp |
2250 | ; load sector if needed |
2252 | ; load sector if needed |
2251 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
2253 | cmp dword [esp+4], 0 ; we don't need to read uninitialized data |
2252 | jz .noread |
2254 | jz .noread |
2253 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
2255 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
2254 | jz .noread |
2256 | jz .noread |
2255 | cmp ecx, esi ; (same for the last sector) |
2257 | cmp ecx, esi ; (same for the last sector) |
2256 | jz .noread |
2258 | jz .noread |
2257 | push ebx |
2259 | push ebx |
2258 | mov ebx, buffer |
2260 | mov ebx, buffer |
2259 | call hd_read |
2261 | call hd_read |
2260 | pop ebx |
2262 | pop ebx |
2261 | cmp [hd_error], 0 |
2263 | cmp [hd_error], 0 |
2262 | jz @f |
2264 | jz @f |
2263 | .device_err2: |
2265 | .device_err2: |
2264 | pop ecx |
2266 | pop ecx |
2265 | jmp .device_err |
2267 | jmp .device_err |
2266 | @@: |
2268 | @@: |
2267 | .noread: |
2269 | .noread: |
2268 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
2270 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
2269 | push eax ecx edi |
2271 | push eax ecx edi |
2270 | xor eax, eax |
2272 | xor eax, eax |
2271 | mov ecx, 0x200 |
2273 | mov ecx, 0x200 |
2272 | sub ecx, [esp+4+12] |
2274 | sub ecx, [esp+4+12] |
2273 | jbe @f |
2275 | jbe @f |
2274 | mov edi, buffer |
2276 | mov edi, buffer |
2275 | add edi, [esp+4+12] |
2277 | add edi, [esp+4+12] |
2276 | rep stosb |
2278 | rep stosb |
2277 | @@: |
2279 | @@: |
2278 | ; zero uninitialized data in the last sector |
2280 | ; zero uninitialized data in the last sector |
2279 | mov ecx, 0x200 |
2281 | mov ecx, 0x200 |
2280 | sub ecx, esi |
2282 | sub ecx, esi |
2281 | jbe @f |
2283 | jbe @f |
2282 | mov edi, buffer |
2284 | mov edi, buffer |
2283 | add edi, esi |
2285 | add edi, esi |
2284 | rep stosb |
2286 | rep stosb |
2285 | @@: |
2287 | @@: |
2286 | pop edi ecx |
2288 | pop edi ecx |
2287 | ; copy new data |
2289 | ; copy new data |
2288 | mov eax, edx |
2290 | mov eax, edx |
2289 | neg ebx |
2291 | neg ebx |
2290 | jecxz @f |
2292 | jecxz @f |
2291 | add ebx, buffer+0x200 |
2293 | add ebx, buffer+0x200 |
2292 | call memmove |
2294 | call memmove |
2293 | xor ebx, ebx |
2295 | xor ebx, ebx |
2294 | @@: |
2296 | @@: |
2295 | pop eax |
2297 | pop eax |
2296 | ; save sector |
2298 | ; save sector |
2297 | push ebx |
2299 | push ebx |
2298 | mov ebx, buffer |
2300 | mov ebx, buffer |
2299 | call hd_write |
2301 | call hd_write |
2300 | pop ebx |
2302 | pop ebx |
2301 | cmp [hd_error], 0 |
2303 | cmp [hd_error], 0 |
2302 | jnz .device_err2 |
2304 | jnz .device_err2 |
2303 | add edx, ecx |
2305 | add edx, ecx |
2304 | sub [esp], ecx |
2306 | sub [esp], ecx |
2305 | pop ecx |
2307 | pop ecx |
2306 | jz .ret |
2308 | jz .ret |
2307 | .skip: |
2309 | .skip: |
2308 | ; next sector |
2310 | ; next sector |
2309 | inc ebp |
2311 | inc ebp |
2310 | cmp ebp, [SECTORS_PER_CLUSTER] |
2312 | cmp ebp, [SECTORS_PER_CLUSTER] |
2311 | jb @f |
2313 | jb @f |
2312 | xor ebp, ebp |
2314 | xor ebp, ebp |
2313 | mov eax, edi |
2315 | mov eax, edi |
2314 | call get_FAT |
2316 | call get_FAT |
2315 | mov edi, eax |
2317 | mov edi, eax |
2316 | cmp [hd_error], 0 |
2318 | cmp [hd_error], 0 |
2317 | jnz .device_err |
2319 | jnz .device_err |
2318 | @@: |
2320 | @@: |
2319 | sub esi, 0x200 |
2321 | sub esi, 0x200 |
2320 | jae @f |
2322 | jae @f |
2321 | xor esi, esi |
2323 | xor esi, esi |
2322 | @@: |
2324 | @@: |
2323 | sub dword [esp], 0x200 |
2325 | sub dword [esp], 0x200 |
2324 | jae @f |
2326 | jae @f |
2325 | and dword [esp], 0 |
2327 | and dword [esp], 0 |
2326 | @@: jmp .write_loop |
2328 | @@: jmp .write_loop |
2327 | 2329 | ||
2328 | hd_extend_file.zero_size: |
2330 | hd_extend_file.zero_size: |
2329 | xor eax, eax |
2331 | xor eax, eax |
2330 | jmp hd_extend_file.start_extend |
2332 | jmp hd_extend_file.start_extend |
2331 | 2333 | ||
2332 | ; extends file on hd to given size (new data area is undefined) |
2334 | ; extends file on hd to given size (new data area is undefined) |
2333 | ; in: edi->direntry, ecx=new size |
2335 | ; in: edi->direntry, ecx=new size |
2334 | ; out: CF=0 => OK, eax=0 |
2336 | ; out: CF=0 => OK, eax=0 |
2335 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
2337 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or 11) |
2336 | hd_extend_file: |
2338 | hd_extend_file: |
2337 | push ebp |
2339 | push ebp |
2338 | mov ebp, [SECTORS_PER_CLUSTER] |
2340 | mov ebp, [SECTORS_PER_CLUSTER] |
2339 | imul ebp, [BYTES_PER_SECTOR] |
2341 | imul ebp, [BYTES_PER_SECTOR] |
2340 | push ecx |
2342 | push ecx |
2341 | ; find the last cluster of file |
2343 | ; find the last cluster of file |
2342 | mov eax, [edi+20-2] |
2344 | mov eax, [edi+20-2] |
2343 | mov ax, [edi+26] |
2345 | mov ax, [edi+26] |
2344 | mov ecx, [edi+28] |
2346 | mov ecx, [edi+28] |
2345 | jecxz .zero_size |
2347 | jecxz .zero_size |
2346 | .last_loop: |
2348 | .last_loop: |
2347 | sub ecx, ebp |
2349 | sub ecx, ebp |
2348 | jbe .last_found |
2350 | jbe .last_found |
2349 | call get_FAT |
2351 | call get_FAT |
2350 | cmp [hd_error], 0 |
2352 | cmp [hd_error], 0 |
2351 | jz @f |
2353 | jz @f |
2352 | .device_err: |
2354 | .device_err: |
2353 | pop ecx |
2355 | pop ecx |
2354 | .device_err2: |
2356 | .device_err2: |
2355 | pop ebp |
2357 | pop ebp |
2356 | push 11 |
2358 | push 11 |
2357 | .ret_err: |
2359 | .ret_err: |
2358 | pop eax |
2360 | pop eax |
2359 | stc |
2361 | stc |
2360 | ret |
2362 | ret |
2361 | @@: |
2363 | @@: |
2362 | cmp eax, 2 |
2364 | cmp eax, 2 |
2363 | jb .fat_err |
2365 | jb .fat_err |
2364 | cmp eax, [fatRESERVED] |
2366 | cmp eax, [fatRESERVED] |
2365 | jb .last_loop |
2367 | jb .last_loop |
2366 | .fat_err: |
2368 | .fat_err: |
2367 | pop ecx ebp |
2369 | pop ecx ebp |
2368 | push ERROR_FAT_TABLE |
2370 | push ERROR_FAT_TABLE |
2369 | jmp .ret_err |
2371 | jmp .ret_err |
2370 | .last_found: |
2372 | .last_found: |
2371 | push eax |
2373 | push eax |
2372 | call get_FAT |
2374 | call get_FAT |
2373 | cmp [hd_error], 0 |
2375 | cmp [hd_error], 0 |
2374 | jz @f |
2376 | jz @f |
2375 | pop eax |
2377 | pop eax |
2376 | jmp .device_err |
2378 | jmp .device_err |
2377 | @@: |
2379 | @@: |
2378 | cmp eax, [fatRESERVED] |
2380 | cmp eax, [fatRESERVED] |
2379 | pop eax |
2381 | pop eax |
2380 | jb .fat_err |
2382 | jb .fat_err |
2381 | ; set length to full number of clusters |
2383 | ; set length to full number of clusters |
2382 | sub [edi+28], ecx |
2384 | sub [edi+28], ecx |
2383 | .start_extend: |
2385 | .start_extend: |
2384 | pop ecx |
2386 | pop ecx |
2385 | ; now do extend |
2387 | ; now do extend |
2386 | push edx |
2388 | push edx |
2387 | mov edx, 2 ; start scan from cluster 2 |
2389 | mov edx, 2 ; start scan from cluster 2 |
2388 | .extend_loop: |
2390 | .extend_loop: |
2389 | cmp [edi+28], ecx |
2391 | cmp [edi+28], ecx |
2390 | jae .extend_done |
2392 | jae .extend_done |
2391 | ; add new cluster |
2393 | ; add new cluster |
2392 | push eax |
2394 | push eax |
2393 | mov eax, edx |
2395 | mov eax, edx |
2394 | call get_free_FAT |
2396 | call get_free_FAT |
2395 | jc .disk_full |
2397 | jc .disk_full |
2396 | mov edx, [fatEND] |
2398 | mov edx, [fatEND] |
2397 | call set_FAT |
2399 | call set_FAT |
2398 | mov edx, eax |
2400 | mov edx, eax |
2399 | pop eax |
2401 | pop eax |
2400 | test eax, eax |
2402 | test eax, eax |
2401 | jz .first_cluster |
2403 | jz .first_cluster |
2402 | push edx |
2404 | push edx |
2403 | call set_FAT |
2405 | call set_FAT |
2404 | pop edx |
2406 | pop edx |
2405 | jmp @f |
2407 | jmp @f |
2406 | .first_cluster: |
2408 | .first_cluster: |
2407 | ror edx, 16 |
2409 | ror edx, 16 |
2408 | mov [edi+20], dx |
2410 | mov [edi+20], dx |
2409 | ror edx, 16 |
2411 | ror edx, 16 |
2410 | mov [edi+26], dx |
2412 | mov [edi+26], dx |
2411 | @@: |
2413 | @@: |
2412 | push ecx |
2414 | push ecx |
2413 | mov ecx, -1 |
2415 | mov ecx, -1 |
2414 | call add_disk_free_space |
2416 | call add_disk_free_space |
2415 | pop ecx |
2417 | pop ecx |
2416 | mov eax, edx |
2418 | mov eax, edx |
2417 | cmp [hd_error], 0 |
2419 | cmp [hd_error], 0 |
2418 | jnz .device_err3 |
2420 | jnz .device_err3 |
2419 | add [edi+28], ebp |
2421 | add [edi+28], ebp |
2420 | jmp .extend_loop |
2422 | jmp .extend_loop |
2421 | .extend_done: |
2423 | .extend_done: |
2422 | mov [edi+28], ecx |
2424 | mov [edi+28], ecx |
2423 | pop edx ebp |
2425 | pop edx ebp |
2424 | xor eax, eax ; CF=0 |
2426 | xor eax, eax ; CF=0 |
2425 | ret |
2427 | ret |
2426 | .device_err3: |
2428 | .device_err3: |
2427 | pop edx |
2429 | pop edx |
2428 | jmp .device_err2 |
2430 | jmp .device_err2 |
2429 | .disk_full: |
2431 | .disk_full: |
2430 | pop eax edx ebp |
2432 | pop eax edx ebp |
2431 | push ERROR_DISK_FULL |
2433 | push ERROR_DISK_FULL |
2432 | pop eax |
2434 | pop eax |
2433 | cmp [hd_error], 0 |
2435 | cmp [hd_error], 0 |
2434 | jz @f |
2436 | jz @f |
2435 | mov al, 11 |
2437 | mov al, 11 |
2436 | @@: stc |
2438 | @@: stc |
2437 | ret |
2439 | ret |
2438 | 2440 | ||
2439 | ;---------------------------------------------------------------- |
2441 | ;---------------------------------------------------------------- |
2440 | ; |
2442 | ; |
2441 | ; fs_HdSetFileEnd - set end of file on hard disk |
2443 | ; fs_HdSetFileEnd - set end of file on hard disk |
2442 | ; |
2444 | ; |
2443 | ; esi points to filename |
2445 | ; esi points to filename |
2444 | ; ebx points to 64-bit number = new file size |
2446 | ; ebx points to 64-bit number = new file size |
2445 | ; ecx ignored (reserved) |
2447 | ; ecx ignored (reserved) |
2446 | ; edx ignored (reserved) |
2448 | ; edx ignored (reserved) |
2447 | ; |
2449 | ; |
2448 | ; ret eax = 0 ok or other = errormsg |
2450 | ; ret eax = 0 ok or other = errormsg |
2449 | ; |
2451 | ; |
2450 | ;-------------------------------------------------------------- |
2452 | ;-------------------------------------------------------------- |
2451 | fs_HdSetFileEnd: |
2453 | fs_HdSetFileEnd: |
2452 | cmp [fs_type], 1 |
2454 | cmp [fs_type], 1 |
2453 | jz ntfs_HdSetFileEnd |
2455 | jz ntfs_HdSetFileEnd |
2454 | cmp [fs_type], 16 |
2456 | cmp [fs_type], 16 |
2455 | jz @f |
2457 | jz @f |
2456 | cmp [fs_type], 32 |
2458 | cmp [fs_type], 32 |
2457 | jz @f |
2459 | jz @f |
2458 | push ERROR_UNKNOWN_FS |
2460 | push ERROR_UNKNOWN_FS |
2459 | .ret: |
2461 | .ret: |
2460 | pop eax |
2462 | pop eax |
2461 | ret |
2463 | ret |
2462 | @@: |
2464 | @@: |
2463 | cmp byte [esi], 0 |
2465 | cmp byte [esi], 0 |
2464 | jnz @f |
2466 | jnz @f |
2465 | .access_denied: |
2467 | .access_denied: |
2466 | push ERROR_ACCESS_DENIED |
2468 | push ERROR_ACCESS_DENIED |
2467 | jmp .ret |
2469 | jmp .ret |
2468 | @@: |
2470 | @@: |
2469 | push edi |
2471 | push edi |
2470 | call hd_find_lfn |
2472 | call hd_find_lfn |
2471 | pushfd |
2473 | pushfd |
2472 | cmp [hd_error], 0 |
2474 | cmp [hd_error], 0 |
2473 | jz @f |
2475 | jz @f |
2474 | popfd |
2476 | popfd |
2475 | push 11 |
2477 | push 11 |
2476 | jmp .ret |
2478 | jmp .ret |
2477 | @@: |
2479 | @@: |
2478 | popfd |
2480 | popfd |
2479 | jnc @f |
2481 | jnc @f |
2480 | pop edi |
2482 | pop edi |
2481 | push ERROR_FILE_NOT_FOUND |
2483 | push ERROR_FILE_NOT_FOUND |
2482 | jmp .ret |
2484 | jmp .ret |
2483 | @@: |
2485 | @@: |
2484 | ; must not be directory |
2486 | ; must not be directory |
2485 | test byte [edi+11], 10h |
2487 | test byte [edi+11], 10h |
2486 | jz @f |
2488 | jz @f |
2487 | pop edi |
2489 | pop edi |
2488 | jmp .access_denied |
2490 | jmp .access_denied |
2489 | @@: |
2491 | @@: |
2490 | ; file size must not exceed 4 Gb |
2492 | ; file size must not exceed 4 Gb |
2491 | cmp dword [ebx+4], 0 |
2493 | cmp dword [ebx+4], 0 |
2492 | jz @f |
2494 | jz @f |
2493 | pop edi |
2495 | pop edi |
2494 | push ERROR_END_OF_FILE |
2496 | push ERROR_END_OF_FILE |
2495 | jmp .ret |
2497 | jmp .ret |
2496 | @@: |
2498 | @@: |
2497 | push eax ; save directory sector |
2499 | push eax ; save directory sector |
2498 | ; set file modification date/time to current |
2500 | ; set file modification date/time to current |
2499 | call fat_update_datetime |
2501 | call fat_update_datetime |
2500 | mov eax, [ebx] |
2502 | mov eax, [ebx] |
2501 | cmp eax, [edi+28] |
2503 | cmp eax, [edi+28] |
2502 | jb .truncate |
2504 | jb .truncate |
2503 | ja .expand |
2505 | ja .expand |
2504 | pop eax |
2506 | pop eax |
2505 | mov ebx, buffer |
2507 | mov ebx, buffer |
2506 | call hd_write |
2508 | call hd_write |
2507 | pop edi |
2509 | pop edi |
2508 | xor eax, eax |
2510 | xor eax, eax |
2509 | cmp [hd_error], 0 |
2511 | cmp [hd_error], 0 |
2510 | jz @f |
2512 | jz @f |
2511 | mov al, 11 |
2513 | mov al, 11 |
2512 | @@: |
2514 | @@: |
2513 | ret |
2515 | ret |
2514 | .expand: |
2516 | .expand: |
2515 | push ebx ebp ecx |
2517 | push ebx ebp ecx |
2516 | push dword [edi+28] ; save old size |
2518 | push dword [edi+28] ; save old size |
2517 | mov ecx, eax |
2519 | mov ecx, eax |
2518 | call hd_extend_file |
2520 | call hd_extend_file |
2519 | push eax ; return code |
2521 | push eax ; return code |
2520 | jnc .expand_ok |
2522 | jnc .expand_ok |
2521 | cmp al, ERROR_DISK_FULL |
2523 | cmp al, ERROR_DISK_FULL |
2522 | jz .disk_full |
2524 | jz .disk_full |
2523 | .pop_ret: |
2525 | .pop_ret: |
2524 | call update_disk |
2526 | call update_disk |
2525 | pop eax ecx ebp ebx ecx edi edi |
2527 | pop eax ecx ebp ebx ecx edi edi |
2526 | ret |
2528 | ret |
2527 | .expand_ok: |
2529 | .expand_ok: |
2528 | .disk_full: |
2530 | .disk_full: |
2529 | ; save directory |
2531 | ; save directory |
2530 | mov eax, [edi+28] |
2532 | mov eax, [edi+28] |
2531 | xchg eax, [esp+20] |
2533 | xchg eax, [esp+20] |
2532 | mov ebx, buffer |
2534 | mov ebx, buffer |
2533 | call hd_write |
2535 | call hd_write |
2534 | mov eax, [edi+20-2] |
2536 | mov eax, [edi+20-2] |
2535 | mov ax, [edi+26] |
2537 | mov ax, [edi+26] |
2536 | mov edi, eax |
2538 | mov edi, eax |
2537 | cmp [hd_error], 0 |
2539 | cmp [hd_error], 0 |
2538 | jz @f |
2540 | jz @f |
2539 | .pop_ret11: |
2541 | .pop_ret11: |
2540 | mov byte [esp], 11 |
2542 | mov byte [esp], 11 |
2541 | jmp .pop_ret |
2543 | jmp .pop_ret |
2542 | @@: |
2544 | @@: |
2543 | ; now zero new data |
2545 | ; now zero new data |
2544 | xor ebp, ebp |
2546 | xor ebp, ebp |
2545 | ; edi=current cluster, ebp=sector in cluster |
2547 | ; edi=current cluster, ebp=sector in cluster |
2546 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
2548 | ; [esp+20]=new size, [esp+4]=old size, [esp]=return code |
2547 | .zero_loop: |
2549 | .zero_loop: |
2548 | sub dword [esp+4], 0x200 |
2550 | sub dword [esp+4], 0x200 |
2549 | jae .next_cluster |
2551 | jae .next_cluster |
2550 | lea eax, [edi-2] |
2552 | lea eax, [edi-2] |
2551 | imul eax, [SECTORS_PER_CLUSTER] |
2553 | imul eax, [SECTORS_PER_CLUSTER] |
2552 | add eax, [DATA_START] |
2554 | add eax, [DATA_START] |
2553 | add eax, ebp |
2555 | add eax, ebp |
2554 | cmp dword [esp+4], -0x200 |
2556 | cmp dword [esp+4], -0x200 |
2555 | jz .noread |
2557 | jz .noread |
2556 | mov ebx, buffer |
2558 | mov ebx, buffer |
2557 | call hd_read |
2559 | call hd_read |
2558 | cmp [hd_error], 0 |
2560 | cmp [hd_error], 0 |
2559 | jnz .err_next |
2561 | jnz .err_next |
2560 | .noread: |
2562 | .noread: |
2561 | mov ecx, [esp+4] |
2563 | mov ecx, [esp+4] |
2562 | neg ecx |
2564 | neg ecx |
2563 | push edi |
2565 | push edi |
2564 | mov edi, buffer+0x200 |
2566 | mov edi, buffer+0x200 |
2565 | add edi, [esp+8] |
2567 | add edi, [esp+8] |
2566 | push eax |
2568 | push eax |
2567 | xor eax, eax |
2569 | xor eax, eax |
2568 | mov [esp+12], eax |
2570 | mov [esp+12], eax |
2569 | rep stosb |
2571 | rep stosb |
2570 | pop eax |
2572 | pop eax |
2571 | pop edi |
2573 | pop edi |
2572 | call hd_write |
2574 | call hd_write |
2573 | cmp [hd_error], 0 |
2575 | cmp [hd_error], 0 |
2574 | jz .next_cluster |
2576 | jz .next_cluster |
2575 | .err_next: |
2577 | .err_next: |
2576 | mov byte [esp], 11 |
2578 | mov byte [esp], 11 |
2577 | .next_cluster: |
2579 | .next_cluster: |
2578 | sub dword [esp+20], 0x200 |
2580 | sub dword [esp+20], 0x200 |
2579 | jbe .pop_ret |
2581 | jbe .pop_ret |
2580 | inc ebp |
2582 | inc ebp |
2581 | cmp ebp, [SECTORS_PER_CLUSTER] |
2583 | cmp ebp, [SECTORS_PER_CLUSTER] |
2582 | jb .zero_loop |
2584 | jb .zero_loop |
2583 | xor ebp, ebp |
2585 | xor ebp, ebp |
2584 | mov eax, edi |
2586 | mov eax, edi |
2585 | call get_FAT |
2587 | call get_FAT |
2586 | mov edi, eax |
2588 | mov edi, eax |
2587 | cmp [hd_error], 0 |
2589 | cmp [hd_error], 0 |
2588 | jnz .pop_ret11 |
2590 | jnz .pop_ret11 |
2589 | jmp .zero_loop |
2591 | jmp .zero_loop |
2590 | .truncate: |
2592 | .truncate: |
2591 | mov [edi+28], eax |
2593 | mov [edi+28], eax |
2592 | push ecx |
2594 | push ecx |
2593 | mov ecx, [edi+20-2] |
2595 | mov ecx, [edi+20-2] |
2594 | mov cx, [edi+26] |
2596 | mov cx, [edi+26] |
2595 | push eax |
2597 | push eax |
2596 | test eax, eax |
2598 | test eax, eax |
2597 | jz .zero_size |
2599 | jz .zero_size |
2598 | ; find new last cluster |
2600 | ; find new last cluster |
2599 | @@: |
2601 | @@: |
2600 | mov eax, [SECTORS_PER_CLUSTER] |
2602 | mov eax, [SECTORS_PER_CLUSTER] |
2601 | shl eax, 9 |
2603 | shl eax, 9 |
2602 | sub [esp], eax |
2604 | sub [esp], eax |
2603 | jbe @f |
2605 | jbe @f |
2604 | mov eax, ecx |
2606 | mov eax, ecx |
2605 | call get_FAT |
2607 | call get_FAT |
2606 | mov ecx, eax |
2608 | mov ecx, eax |
2607 | cmp [hd_error], 0 |
2609 | cmp [hd_error], 0 |
2608 | jz @b |
2610 | jz @b |
2609 | .device_err3: |
2611 | .device_err3: |
2610 | pop eax ecx eax edi |
2612 | pop eax ecx eax edi |
2611 | push 11 |
2613 | push 11 |
2612 | pop eax |
2614 | pop eax |
2613 | ret |
2615 | ret |
2614 | @@: |
2616 | @@: |
2615 | ; we will zero data at the end of last sector - remember it |
2617 | ; we will zero data at the end of last sector - remember it |
2616 | push ecx |
2618 | push ecx |
2617 | ; terminate FAT chain |
2619 | ; terminate FAT chain |
2618 | push edx |
2620 | push edx |
2619 | mov eax, ecx |
2621 | mov eax, ecx |
2620 | mov edx, [fatEND] |
2622 | mov edx, [fatEND] |
2621 | call set_FAT |
2623 | call set_FAT |
2622 | mov eax, edx |
2624 | mov eax, edx |
2623 | pop edx |
2625 | pop edx |
2624 | cmp [hd_error], 0 |
2626 | cmp [hd_error], 0 |
2625 | jz @f |
2627 | jz @f |
2626 | .device_err4: |
2628 | .device_err4: |
2627 | pop ecx |
2629 | pop ecx |
2628 | jmp .device_err3 |
2630 | jmp .device_err3 |
2629 | .zero_size: |
2631 | .zero_size: |
2630 | and word [edi+20], 0 |
2632 | and word [edi+20], 0 |
2631 | and word [edi+26], 0 |
2633 | and word [edi+26], 0 |
2632 | push 0 |
2634 | push 0 |
2633 | mov eax, ecx |
2635 | mov eax, ecx |
2634 | @@: |
2636 | @@: |
2635 | ; delete FAT chain |
2637 | ; delete FAT chain |
2636 | call clear_cluster_chain |
2638 | call clear_cluster_chain |
2637 | cmp [hd_error], 0 |
2639 | cmp [hd_error], 0 |
2638 | jnz .device_err4 |
2640 | jnz .device_err4 |
2639 | ; save directory |
2641 | ; save directory |
2640 | mov eax, [esp+12] |
2642 | mov eax, [esp+12] |
2641 | push ebx |
2643 | push ebx |
2642 | mov ebx, buffer |
2644 | mov ebx, buffer |
2643 | call hd_write |
2645 | call hd_write |
2644 | pop ebx |
2646 | pop ebx |
2645 | cmp [hd_error], 0 |
2647 | cmp [hd_error], 0 |
2646 | jnz .device_err4 |
2648 | jnz .device_err4 |
2647 | ; zero last sector, ignore errors |
2649 | ; zero last sector, ignore errors |
2648 | pop ecx |
2650 | pop ecx |
2649 | pop eax |
2651 | pop eax |
2650 | dec ecx |
2652 | dec ecx |
2651 | imul ecx, [SECTORS_PER_CLUSTER] |
2653 | imul ecx, [SECTORS_PER_CLUSTER] |
2652 | add ecx, [DATA_START] |
2654 | add ecx, [DATA_START] |
2653 | push eax |
2655 | push eax |
2654 | sar eax, 9 |
2656 | sar eax, 9 |
2655 | add ecx, eax |
2657 | add ecx, eax |
2656 | pop eax |
2658 | pop eax |
2657 | and eax, 0x1FF |
2659 | and eax, 0x1FF |
2658 | jz .truncate_done |
2660 | jz .truncate_done |
2659 | push ebx eax |
2661 | push ebx eax |
2660 | mov eax, ecx |
2662 | mov eax, ecx |
2661 | mov ebx, buffer |
2663 | mov ebx, buffer |
2662 | call hd_read |
2664 | call hd_read |
2663 | pop eax |
2665 | pop eax |
2664 | lea edi, [buffer+eax] |
2666 | lea edi, [buffer+eax] |
2665 | push ecx |
2667 | push ecx |
2666 | mov ecx, 0x200 |
2668 | mov ecx, 0x200 |
2667 | sub ecx, eax |
2669 | sub ecx, eax |
2668 | xor eax, eax |
2670 | xor eax, eax |
2669 | rep stosb |
2671 | rep stosb |
2670 | pop eax |
2672 | pop eax |
2671 | call hd_write |
2673 | call hd_write |
2672 | pop ebx |
2674 | pop ebx |
2673 | .truncate_done: |
2675 | .truncate_done: |
2674 | pop ecx eax edi |
2676 | pop ecx eax edi |
2675 | call update_disk |
2677 | call update_disk |
2676 | xor eax, eax |
2678 | xor eax, eax |
2677 | cmp [hd_error], 0 |
2679 | cmp [hd_error], 0 |
2678 | jz @f |
2680 | jz @f |
2679 | mov al, 11 |
2681 | mov al, 11 |
2680 | @@: |
2682 | @@: |
2681 | ret |
2683 | ret |
2682 | 2684 | ||
2683 | fs_HdGetFileInfo: |
2685 | fs_HdGetFileInfo: |
2684 | cmp [fs_type], 1 |
2686 | cmp [fs_type], 1 |
2685 | jz ntfs_HdGetFileInfo |
2687 | jz ntfs_HdGetFileInfo |
2686 | cmp [fs_type], 16 |
2688 | cmp [fs_type], 16 |
2687 | jz @f |
2689 | jz @f |
2688 | cmp [fs_type], 32 |
2690 | cmp [fs_type], 32 |
2689 | jz @f |
2691 | jz @f |
2690 | mov eax, ERROR_UNKNOWN_FS |
2692 | mov eax, ERROR_UNKNOWN_FS |
2691 | ret |
2693 | ret |
2692 | @@: |
2694 | @@: |
2693 | cmp byte [esi], 0 |
2695 | cmp byte [esi], 0 |
2694 | jnz @f |
2696 | jnz @f |
2695 | mov eax, 2 |
2697 | mov eax, 2 |
2696 | ret |
2698 | ret |
2697 | @@: |
2699 | @@: |
2698 | push edi |
2700 | push edi |
2699 | call hd_find_lfn |
2701 | call hd_find_lfn |
2700 | pushfd |
2702 | pushfd |
2701 | cmp [hd_error], 0 |
2703 | cmp [hd_error], 0 |
2702 | jz @f |
2704 | jz @f |
2703 | popfd |
2705 | popfd |
2704 | pop edi |
2706 | pop edi |
2705 | mov eax, 11 |
2707 | mov eax, 11 |
2706 | ret |
2708 | ret |
2707 | @@: |
2709 | @@: |
2708 | popfd |
2710 | popfd |
2709 | jmp fs_GetFileInfo_finish |
2711 | jmp fs_GetFileInfo_finish |
2710 | 2712 | ||
2711 | fs_HdSetFileInfo: |
2713 | fs_HdSetFileInfo: |
2712 | cmp [fs_type], 1 |
2714 | cmp [fs_type], 1 |
2713 | jz ntfs_HdSetFileInfo |
2715 | jz ntfs_HdSetFileInfo |
2714 | cmp [fs_type], 16 |
2716 | cmp [fs_type], 16 |
2715 | jz @f |
2717 | jz @f |
2716 | cmp [fs_type], 32 |
2718 | cmp [fs_type], 32 |
2717 | jz @f |
2719 | jz @f |
2718 | mov eax, ERROR_UNKNOWN_FS |
2720 | mov eax, ERROR_UNKNOWN_FS |
2719 | ret |
2721 | ret |
2720 | @@: |
2722 | @@: |
2721 | cmp byte [esi], 0 |
2723 | cmp byte [esi], 0 |
2722 | jnz @f |
2724 | jnz @f |
2723 | mov eax, 2 |
2725 | mov eax, 2 |
2724 | ret |
2726 | ret |
2725 | @@: |
2727 | @@: |
2726 | push edi |
2728 | push edi |
2727 | call hd_find_lfn |
2729 | call hd_find_lfn |
2728 | pushfd |
2730 | pushfd |
2729 | cmp [hd_error], 0 |
2731 | cmp [hd_error], 0 |
2730 | jz @f |
2732 | jz @f |
2731 | popfd |
2733 | popfd |
2732 | pop edi |
2734 | pop edi |
2733 | mov eax, 11 |
2735 | mov eax, 11 |
2734 | ret |
2736 | ret |
2735 | @@: |
2737 | @@: |
2736 | popfd |
2738 | popfd |
2737 | jnc @f |
2739 | jnc @f |
2738 | pop edi |
2740 | pop edi |
2739 | mov eax, ERROR_FILE_NOT_FOUND |
2741 | mov eax, ERROR_FILE_NOT_FOUND |
2740 | ret |
2742 | ret |
2741 | @@: |
2743 | @@: |
2742 | push eax |
2744 | push eax |
2743 | call bdfe_to_fat_entry |
2745 | call bdfe_to_fat_entry |
2744 | pop eax |
2746 | pop eax |
2745 | mov ebx, buffer |
2747 | mov ebx, buffer |
2746 | call hd_write |
2748 | call hd_write |
2747 | call update_disk |
2749 | call update_disk |
2748 | pop edi |
2750 | pop edi |
2749 | xor eax, eax |
2751 | xor eax, eax |
2750 | ret |
2752 | ret |
2751 | 2753 | ||
2752 | ;---------------------------------------------------------------- |
2754 | ;---------------------------------------------------------------- |
2753 | ; |
2755 | ; |
2754 | ; fs_HdDelete - delete file or empty folder from hard disk |
2756 | ; fs_HdDelete - delete file or empty folder from hard disk |
2755 | ; |
2757 | ; |
2756 | ; esi points to filename |
2758 | ; esi points to filename |
2757 | ; |
2759 | ; |
2758 | ; ret eax = 0 ok or other = errormsg |
2760 | ; ret eax = 0 ok or other = errormsg |
2759 | ; |
2761 | ; |
2760 | ;-------------------------------------------------------------- |
2762 | ;-------------------------------------------------------------- |
2761 | fs_HdDelete: |
2763 | fs_HdDelete: |
2762 | cmp [fs_type], 1 |
2764 | cmp [fs_type], 1 |
2763 | jz ntfs_HdDelete |
2765 | jz ntfs_HdDelete |
2764 | cmp [fs_type], 16 |
2766 | cmp [fs_type], 16 |
2765 | jz @f |
2767 | jz @f |
2766 | cmp [fs_type], 32 |
2768 | cmp [fs_type], 32 |
2767 | jz @f |
2769 | jz @f |
2768 | push ERROR_UNKNOWN_FS |
2770 | push ERROR_UNKNOWN_FS |
2769 | .pop_ret: |
2771 | .pop_ret: |
2770 | pop eax |
2772 | pop eax |
2771 | ret |
2773 | ret |
2772 | @@: |
2774 | @@: |
2773 | cmp byte [esi], 0 |
2775 | cmp byte [esi], 0 |
2774 | jnz @f |
2776 | jnz @f |
2775 | ; cannot delete root! |
2777 | ; cannot delete root! |
2776 | .access_denied: |
2778 | .access_denied: |
2777 | push ERROR_ACCESS_DENIED |
2779 | push ERROR_ACCESS_DENIED |
2778 | jmp .pop_ret |
2780 | jmp .pop_ret |
2779 | @@: |
2781 | @@: |
2780 | and [longname_sec1], 0 |
2782 | and [longname_sec1], 0 |
2781 | and [longname_sec2], 0 |
2783 | and [longname_sec2], 0 |
2782 | push edi |
2784 | push edi |
2783 | call hd_find_lfn |
2785 | call hd_find_lfn |
2784 | jnc .found |
2786 | jnc .found |
2785 | pop edi |
2787 | pop edi |
2786 | push ERROR_FILE_NOT_FOUND |
2788 | push ERROR_FILE_NOT_FOUND |
2787 | jmp .pop_ret |
2789 | jmp .pop_ret |
2788 | .found: |
2790 | .found: |
2789 | cmp dword [edi], '. ' |
2791 | cmp dword [edi], '. ' |
2790 | jz .access_denied2 |
2792 | jz .access_denied2 |
2791 | cmp dword [edi], '.. ' |
2793 | cmp dword [edi], '.. ' |
2792 | jz .access_denied2 |
2794 | jz .access_denied2 |
2793 | test byte [edi+11], 10h |
2795 | test byte [edi+11], 10h |
2794 | jz .dodel |
2796 | jz .dodel |
2795 | ; we can delete only empty folders! |
2797 | ; we can delete only empty folders! |
2796 | pushad |
2798 | pushad |
2797 | mov ebp, [edi+20-2] |
2799 | mov ebp, [edi+20-2] |
2798 | mov bp, [edi+26] |
2800 | mov bp, [edi+26] |
2799 | xor ecx, ecx |
2801 | xor ecx, ecx |
2800 | lea eax, [ebp-2] |
2802 | lea eax, [ebp-2] |
2801 | imul eax, [SECTORS_PER_CLUSTER] |
2803 | imul eax, [SECTORS_PER_CLUSTER] |
2802 | add eax, [DATA_START] |
2804 | add eax, [DATA_START] |
2803 | mov ebx, buffer |
2805 | mov ebx, buffer |
2804 | call hd_read |
2806 | call hd_read |
2805 | cmp [hd_error], 0 |
2807 | cmp [hd_error], 0 |
2806 | jnz .err1 |
2808 | jnz .err1 |
2807 | add ebx, 2*0x20 |
2809 | add ebx, 2*0x20 |
2808 | .checkempty: |
2810 | .checkempty: |
2809 | cmp byte [ebx], 0 |
2811 | cmp byte [ebx], 0 |
2810 | jz .empty |
2812 | jz .empty |
2811 | cmp byte [ebx], 0xE5 |
2813 | cmp byte [ebx], 0xE5 |
2812 | jnz .notempty |
2814 | jnz .notempty |
2813 | add ebx, 0x20 |
2815 | add ebx, 0x20 |
2814 | cmp ebx, buffer+0x200 |
2816 | cmp ebx, buffer+0x200 |
2815 | jb .checkempty |
2817 | jb .checkempty |
2816 | inc ecx |
2818 | inc ecx |
2817 | cmp ecx, [SECTORS_PER_CLUSTER] |
2819 | cmp ecx, [SECTORS_PER_CLUSTER] |
2818 | jb @f |
2820 | jb @f |
2819 | mov eax, ebp |
2821 | mov eax, ebp |
2820 | call get_FAT |
2822 | call get_FAT |
2821 | cmp [hd_error], 0 |
2823 | cmp [hd_error], 0 |
2822 | jnz .err1 |
2824 | jnz .err1 |
2823 | mov ebp, eax |
2825 | mov ebp, eax |
2824 | xor ecx, ecx |
2826 | xor ecx, ecx |
2825 | @@: |
2827 | @@: |
2826 | lea eax, [ebp-2] |
2828 | lea eax, [ebp-2] |
2827 | imul eax, [SECTORS_PER_CLUSTER] |
2829 | imul eax, [SECTORS_PER_CLUSTER] |
2828 | add eax, [DATA_START] |
2830 | add eax, [DATA_START] |
2829 | add eax, ecx |
2831 | add eax, ecx |
2830 | mov ebx, buffer |
2832 | mov ebx, buffer |
2831 | call hd_read |
2833 | call hd_read |
2832 | cmp [hd_error], 0 |
2834 | cmp [hd_error], 0 |
2833 | jz .checkempty |
2835 | jz .checkempty |
2834 | .err1: |
2836 | .err1: |
2835 | popad |
2837 | popad |
2836 | .err2: |
2838 | .err2: |
2837 | pop edi |
2839 | pop edi |
2838 | push 11 |
2840 | push 11 |
2839 | pop eax |
2841 | pop eax |
2840 | ret |
2842 | ret |
2841 | .notempty: |
2843 | .notempty: |
2842 | popad |
2844 | popad |
2843 | .access_denied2: |
2845 | .access_denied2: |
2844 | pop edi |
2846 | pop edi |
2845 | push ERROR_ACCESS_DENIED |
2847 | push ERROR_ACCESS_DENIED |
2846 | pop eax |
2848 | pop eax |
2847 | ret |
2849 | ret |
2848 | .empty: |
2850 | .empty: |
2849 | popad |
2851 | popad |
2850 | push ebx |
2852 | push ebx |
2851 | mov ebx, buffer |
2853 | mov ebx, buffer |
2852 | call hd_read |
2854 | call hd_read |
2853 | pop ebx |
2855 | pop ebx |
2854 | cmp [hd_error], 0 |
2856 | cmp [hd_error], 0 |
2855 | jnz .err2 |
2857 | jnz .err2 |
2856 | .dodel: |
2858 | .dodel: |
2857 | push eax |
2859 | push eax |
2858 | mov eax, [edi+20-2] |
2860 | mov eax, [edi+20-2] |
2859 | mov ax, [edi+26] |
2861 | mov ax, [edi+26] |
2860 | xchg eax, [esp] |
2862 | xchg eax, [esp] |
2861 | ; delete folder entry |
2863 | ; delete folder entry |
2862 | mov byte [edi], 0xE5 |
2864 | mov byte [edi], 0xE5 |
2863 | ; delete LFN (if present) |
2865 | ; delete LFN (if present) |
2864 | .lfndel: |
2866 | .lfndel: |
2865 | cmp edi, buffer |
2867 | cmp edi, buffer |
2866 | ja @f |
2868 | ja @f |
2867 | cmp [longname_sec2], 0 |
2869 | cmp [longname_sec2], 0 |
2868 | jz .lfndone |
2870 | jz .lfndone |
2869 | push [longname_sec2] |
2871 | push [longname_sec2] |
2870 | push [longname_sec1] |
2872 | push [longname_sec1] |
2871 | pop [longname_sec2] |
2873 | pop [longname_sec2] |
2872 | and [longname_sec1], 0 |
2874 | and [longname_sec1], 0 |
2873 | push ebx |
2875 | push ebx |
2874 | mov ebx, buffer |
2876 | mov ebx, buffer |
2875 | call hd_write |
2877 | call hd_write |
2876 | mov eax, [esp+4] |
2878 | mov eax, [esp+4] |
2877 | call hd_read |
2879 | call hd_read |
2878 | pop ebx |
2880 | pop ebx |
2879 | pop eax |
2881 | pop eax |
2880 | mov edi, buffer+0x200 |
2882 | mov edi, buffer+0x200 |
2881 | @@: |
2883 | @@: |
2882 | sub edi, 0x20 |
2884 | sub edi, 0x20 |
2883 | cmp byte [edi], 0xE5 |
2885 | cmp byte [edi], 0xE5 |
2884 | jz .lfndone |
2886 | jz .lfndone |
2885 | cmp byte [edi+11], 0xF |
2887 | cmp byte [edi+11], 0xF |
2886 | jnz .lfndone |
2888 | jnz .lfndone |
2887 | mov byte [edi], 0xE5 |
2889 | mov byte [edi], 0xE5 |
2888 | jmp .lfndel |
2890 | jmp .lfndel |
2889 | .lfndone: |
2891 | .lfndone: |
2890 | push ebx |
2892 | push ebx |
2891 | mov ebx, buffer |
2893 | mov ebx, buffer |
2892 | call hd_write |
2894 | call hd_write |
2893 | pop ebx |
2895 | pop ebx |
2894 | ; delete FAT chain |
2896 | ; delete FAT chain |
2895 | pop eax |
2897 | pop eax |
2896 | call clear_cluster_chain |
2898 | call clear_cluster_chain |
2897 | call update_disk |
2899 | call update_disk |
2898 | pop edi |
2900 | pop edi |
2899 | xor eax, eax |
2901 | xor eax, eax |
2900 | cmp [hd_error], 0 |
2902 | cmp [hd_error], 0 |
2901 | jz @f |
2903 | jz @f |
2902 | mov al, 11 |
2904 | mov al, 11 |
2903 | @@: |
2905 | @@: |
2904 | ret |
2906 | ret |
2905 | 2907 | ||
2906 | ; \end{diamond}=>=>>> |
2908 | ; \end{diamond}=>=>>> |