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1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
2 | ;; ;; |
3 | ;; FAT32.INC ;; |
3 | ;; FAT32.INC ;; |
4 | ;; ;; |
4 | ;; ;; |
5 | ;; FAT16/32 functions for MenuetOS ;; |
5 | ;; FAT16/32 functions for MenuetOS ;; |
6 | ;; ;; |
6 | ;; ;; |
7 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
7 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
8 | ;; ;; |
8 | ;; ;; |
9 | ;; See file COPYING for details ;; |
9 | ;; See file COPYING for details ;; |
- | 10 | ;; 23.06.2006 LFN start application - diamond ;; |
|
10 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
11 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
11 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
12 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
12 | ;; 04.05.2006 LFN read folder - diamond ;; |
13 | ;; 04.05.2006 LFN read folder - diamond ;; |
13 | ;; 29.04.2006 Elimination of hangup after the ;; |
14 | ;; 29.04.2006 Elimination of hangup after the ;; |
14 | ;; expiration hd_wait_timeout - Mario79 ;; |
15 | ;; expiration hd_wait_timeout - Mario79 ;; |
15 | ;; 23.04.2006 LFN read file - diamond ;; |
16 | ;; 23.04.2006 LFN read file - diamond ;; |
16 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
17 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
17 | ;; to MBR, see file part_set.inc - Mario79 ;; |
18 | ;; to MBR, see file part_set.inc - Mario79 ;; |
18 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
19 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
19 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
20 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
20 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
21 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
21 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
22 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
22 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
23 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
23 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
24 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
24 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
25 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
25 | ;; 08.11.2004 rename - ATV ;; |
26 | ;; 08.11.2004 rename - ATV ;; |
26 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
27 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
27 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
28 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
28 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
29 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
29 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
30 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
30 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
31 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
31 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
32 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
32 | ;; 30.3.2004 Error parameters at function return - VT ;; |
33 | ;; 30.3.2004 Error parameters at function return - VT ;; |
33 | ;; 01.5.2002 Bugfix in device write - VT ;; |
34 | ;; 01.5.2002 Bugfix in device write - VT ;; |
34 | ;; 20.5.2002 Hd status check - VT ;; |
35 | ;; 20.5.2002 Hd status check - VT ;; |
35 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
36 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
36 | ;; ;; |
37 | ;; ;; |
37 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
38 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
38 | 39 | ||
39 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
40 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
40 | 41 | ||
41 | ERROR_SUCCESS = 0 |
42 | ERROR_SUCCESS = 0 |
42 | ERROR_DISK_BASE = 1 |
43 | ERROR_DISK_BASE = 1 |
43 | ERROR_UNSUPPORTED_FS = 2 |
44 | ERROR_UNSUPPORTED_FS = 2 |
44 | ERROR_UNKNOWN_FS = 3 |
45 | ERROR_UNKNOWN_FS = 3 |
45 | ERROR_PARTITION = 4 |
46 | ERROR_PARTITION = 4 |
46 | ERROR_FILE_NOT_FOUND = 5 |
47 | ERROR_FILE_NOT_FOUND = 5 |
47 | ERROR_END_OF_FILE = 6 |
48 | ERROR_END_OF_FILE = 6 |
48 | ERROR_MEMORY_POINTER = 7 |
49 | ERROR_MEMORY_POINTER = 7 |
49 | ERROR_DISK_FULL = 8 |
50 | ERROR_DISK_FULL = 8 |
50 | ERROR_FAT_TABLE = 9 |
51 | ERROR_FAT_TABLE = 9 |
51 | ERROR_ACCESS_DENIED = 10 |
52 | ERROR_ACCESS_DENIED = 10 |
52 | 53 | ||
53 | PUSHAD_EAX equ [esp+28] |
54 | PUSHAD_EAX equ [esp+28] |
54 | PUSHAD_ECX equ [esp+24] |
55 | PUSHAD_ECX equ [esp+24] |
55 | PUSHAD_EDX equ [esp+20] |
56 | PUSHAD_EDX equ [esp+20] |
56 | PUSHAD_EBX equ [esp+16] |
57 | PUSHAD_EBX equ [esp+16] |
57 | PUSHAD_EBP equ [esp+8] |
58 | PUSHAD_EBP equ [esp+8] |
58 | PUSHAD_ESI equ [esp+4] |
59 | PUSHAD_ESI equ [esp+4] |
59 | PUSHAD_EDI equ [esp+0] |
60 | PUSHAD_EDI equ [esp+0] |
60 | 61 | ||
61 | cluster dd 0 ; used by file_write,makedir,append |
62 | cluster dd 0 ; used by file_write,makedir,append |
62 | partition_count dd 0 ; partitions found by set_FAT32_variables |
63 | partition_count dd 0 ; partitions found by set_FAT32_variables |
63 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
64 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
64 | longname_sec2 dd 0 ; directory sectors for delete long filename |
65 | longname_sec2 dd 0 ; directory sectors for delete long filename |
65 | 66 | ||
66 | hd_error dd 0 ; set by wait_for_sector_buffer |
67 | hd_error dd 0 ; set by wait_for_sector_buffer |
67 | hd_setup dd 0 |
68 | hd_setup dd 0 |
68 | hd_wait_timeout dd 0 |
69 | hd_wait_timeout dd 0 |
69 | 70 | ||
70 | cluster_tmp dd 0 ; used by analyze_directory |
71 | cluster_tmp dd 0 ; used by analyze_directory |
71 | ; and analyze_directory_to_write |
72 | ; and analyze_directory_to_write |
72 | 73 | ||
73 | file_size dd 0 ; used by file_read |
74 | file_size dd 0 ; used by file_read |
74 | 75 | ||
75 | sector_tmp dd 0 ; used by rename,append,file_write |
76 | sector_tmp dd 0 ; used by rename,append,file_write |
76 | entry_pos dd 0 ; used by rename,append,file_write |
77 | entry_pos dd 0 ; used by rename,append,file_write |
77 | 78 | ||
78 | old_filesize dd 0 ; used by append |
79 | old_filesize dd 0 ; used by append |
79 | new_filepos dd 0 ; used by append |
80 | new_filepos dd 0 ; used by append |
80 | bytes2write dd 0 ; used by append |
81 | bytes2write dd 0 ; used by append |
81 | 82 | ||
82 | cache_search_start dd 0 ; used by find_empty_slot |
83 | cache_search_start dd 0 ; used by find_empty_slot |
83 | 84 | ||
84 | fat_in_cache dd -1 |
85 | fat_in_cache dd -1 |
85 | fat_cache: times 512 db 0 |
86 | fat_cache: times 512 db 0 |
86 | 87 | ||
87 | uglobal |
88 | uglobal |
88 | Sector512: ; label for dev_hdcd.inc |
89 | Sector512: ; label for dev_hdcd.inc |
89 | buffer: times 512 db 0 |
90 | buffer: times 512 db 0 |
90 | deltree_buffer: times 512 db 0 |
91 | deltree_buffer: times 512 db 0 |
91 | endg |
92 | endg |
92 | 93 | ||
93 | iglobal |
94 | iglobal |
94 | NewDirEntry1 db ". ",0x10 |
95 | NewDirEntry1 db ". ",0x10 |
95 | times 20 db 0 |
96 | times 20 db 0 |
96 | NewDirEntry2 db ".. ",0x10 |
97 | NewDirEntry2 db ".. ",0x10 |
97 | times 20 db 0 |
98 | times 20 db 0 |
98 | endg |
99 | endg |
99 | 100 | ||
100 | uglobal |
101 | uglobal |
101 | dir_entry: times 32 db 0 |
102 | dir_entry: times 32 db 0 |
102 | 103 | ||
103 | startpath: times 255 db 0 |
104 | startpath: times 255 db 0 |
104 | 105 | ||
105 | fat16_root db 0 ; flag for fat16 rootdir |
106 | fat16_root db 0 ; flag for fat16 rootdir |
106 | f_del db 0 ; 1=overwrite fat entry |
107 | f_del db 0 ; 1=overwrite fat entry |
107 | fat_change db 0 ; 1=fat has changed |
108 | fat_change db 0 ; 1=fat has changed |
108 | 109 | ||
109 | endg |
110 | endg |
110 | 111 | ||
111 | reserve_hd1: |
112 | reserve_hd1: |
112 | 113 | ||
113 | cli |
114 | cli |
114 | cmp [hd1_status],0 |
115 | cmp [hd1_status],0 |
115 | je reserve_ok1 |
116 | je reserve_ok1 |
116 | 117 | ||
117 | sti |
118 | sti |
118 | call change_task |
119 | call change_task |
119 | jmp reserve_hd1 |
120 | jmp reserve_hd1 |
120 | 121 | ||
121 | reserve_ok1: |
122 | reserve_ok1: |
122 | 123 | ||
123 | push eax |
124 | push eax |
124 | mov eax,[0x3000] |
125 | mov eax,[0x3000] |
125 | shl eax,5 |
126 | shl eax,5 |
126 | mov eax,[eax+0x3000+4] |
127 | mov eax,[eax+0x3000+4] |
127 | mov [hd1_status],eax |
128 | mov [hd1_status],eax |
128 | pop eax |
129 | pop eax |
129 | sti |
130 | sti |
130 | ret |
131 | ret |
131 | 132 | ||
132 | 133 | ||
133 | clear_hd_cache: |
134 | clear_hd_cache: |
134 | 135 | ||
135 | push eax ecx edi |
136 | push eax ecx edi |
136 | mov edi,0x600000 |
137 | mov edi,0x600000 |
137 | mov ecx,16384 |
138 | mov ecx,16384 |
138 | xor eax,eax |
139 | xor eax,eax |
139 | cld |
140 | cld |
140 | rep stosd ; clear hd cache with 0 |
141 | rep stosd ; clear hd cache with 0 |
141 | mov [cache_search_start],eax |
142 | mov [cache_search_start],eax |
142 | mov [fat_in_cache],-1 |
143 | mov [fat_in_cache],-1 |
143 | mov [fat_change],0 |
144 | mov [fat_change],0 |
144 | pop edi ecx eax |
145 | pop edi ecx eax |
145 | ret |
146 | ret |
146 | 147 | ||
147 | problem_partition db 0 ; used for partitions search |
148 | problem_partition db 0 ; used for partitions search |
148 | 149 | ||
149 | include 'part_set.inc' |
150 | include 'part_set.inc' |
150 | 151 | ||
151 | set_FAT: |
152 | set_FAT: |
152 | ;-------------------------------- |
153 | ;-------------------------------- |
153 | ; input : EAX = cluster |
154 | ; input : EAX = cluster |
154 | ; EDX = value to save |
155 | ; EDX = value to save |
155 | ; output : EDX = old value |
156 | ; output : EDX = old value |
156 | ;-------------------------------- |
157 | ;-------------------------------- |
157 | push eax ebx esi |
158 | push eax ebx esi |
158 | 159 | ||
159 | cmp eax,2 |
160 | cmp eax,2 |
160 | jb sfc_error |
161 | jb sfc_error |
161 | cmp eax,[LAST_CLUSTER] |
162 | cmp eax,[LAST_CLUSTER] |
162 | ja sfc_error |
163 | ja sfc_error |
163 | cmp [fat_type],16 |
164 | cmp [fat_type],16 |
164 | je sfc_1 |
165 | je sfc_1 |
165 | add eax,eax |
166 | add eax,eax |
166 | sfc_1: |
167 | sfc_1: |
167 | add eax,eax |
168 | add eax,eax |
168 | mov esi,511 |
169 | mov esi,511 |
169 | and esi,eax ; esi = position in fat sector |
170 | and esi,eax ; esi = position in fat sector |
170 | shr eax,9 ; eax = fat sector |
171 | shr eax,9 ; eax = fat sector |
171 | add eax,[FAT_START] |
172 | add eax,[FAT_START] |
172 | mov ebx,fat_cache |
173 | mov ebx,fat_cache |
173 | 174 | ||
174 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
175 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
175 | je sfc_in_cache ; yes |
176 | je sfc_in_cache ; yes |
176 | 177 | ||
177 | cmp [fat_change],0 ; is fat changed? |
178 | cmp [fat_change],0 ; is fat changed? |
178 | je sfc_no_change ; no |
179 | je sfc_no_change ; no |
179 | call write_fat_sector ; yes. write it into disk |
180 | call write_fat_sector ; yes. write it into disk |
180 | cmp [hd_error],0 |
181 | cmp [hd_error],0 |
181 | jne sfc_error |
182 | jne sfc_error |
182 | 183 | ||
183 | sfc_no_change: |
184 | sfc_no_change: |
184 | mov [fat_in_cache],eax ; save fat sector |
185 | mov [fat_in_cache],eax ; save fat sector |
185 | call hd_read |
186 | call hd_read |
186 | cmp [hd_error],0 |
187 | cmp [hd_error],0 |
187 | jne sfc_error |
188 | jne sfc_error |
188 | 189 | ||
189 | 190 | ||
190 | sfc_in_cache: |
191 | sfc_in_cache: |
191 | cmp [fat_type],16 |
192 | cmp [fat_type],16 |
192 | jne sfc_test32 |
193 | jne sfc_test32 |
193 | 194 | ||
194 | cmp [f_del],1 ; overwrite previous value? |
195 | cmp [f_del],1 ; overwrite previous value? |
195 | je sfc_set16 ; yes |
196 | je sfc_set16 ; yes |
196 | cmp word [ebx+esi],0 ; is cluster free? |
197 | cmp word [ebx+esi],0 ; is cluster free? |
197 | je sfc_set16 ; yes |
198 | je sfc_set16 ; yes |
198 | mov dword [8*0x100000],0xffffff |
199 | mov dword [8*0x100000],0xffffff |
199 | mov edx,[ebx+esi] ; get old value |
200 | mov edx,[ebx+esi] ; get old value |
200 | jmp sfc_nonzero |
201 | jmp sfc_nonzero |
201 | 202 | ||
202 | sfc_set16: |
203 | sfc_set16: |
203 | xchg [ebx+esi],dx ; save new value and get old value |
204 | xchg [ebx+esi],dx ; save new value and get old value |
204 | jmp sfc_write |
205 | jmp sfc_write |
205 | 206 | ||
206 | sfc_test32: |
207 | sfc_test32: |
207 | mov eax,[fatMASK] |
208 | mov eax,[fatMASK] |
208 | cmp [f_del],1 ; overwrite previous value? |
209 | cmp [f_del],1 ; overwrite previous value? |
209 | je sfc_set32 ; yes |
210 | je sfc_set32 ; yes |
210 | test eax,[ebx+esi] ; is cluster free? |
211 | test eax,[ebx+esi] ; is cluster free? |
211 | je sfc_set32 ; yes |
212 | je sfc_set32 ; yes |
212 | mov dword [8*0x100000],0xffffff |
213 | mov dword [8*0x100000],0xffffff |
213 | mov edx,[ebx+esi] ; get old value |
214 | mov edx,[ebx+esi] ; get old value |
214 | jmp sfc_nonzero |
215 | jmp sfc_nonzero |
215 | 216 | ||
216 | sfc_set32: |
217 | sfc_set32: |
217 | and edx,eax |
218 | and edx,eax |
218 | xor eax,-1 ; mask for high bits |
219 | xor eax,-1 ; mask for high bits |
219 | and eax,[ebx+esi] ; get high 4 bits |
220 | and eax,[ebx+esi] ; get high 4 bits |
220 | or eax,edx |
221 | or eax,edx |
221 | mov edx,[ebx+esi] ; get old value |
222 | mov edx,[ebx+esi] ; get old value |
222 | mov [ebx+esi],eax ; save new value |
223 | mov [ebx+esi],eax ; save new value |
223 | 224 | ||
224 | sfc_write: |
225 | sfc_write: |
225 | mov [fat_change],1 ; fat has changed |
226 | mov [fat_change],1 ; fat has changed |
226 | 227 | ||
227 | sfc_nonzero: |
228 | sfc_nonzero: |
228 | and edx,[fatMASK] |
229 | and edx,[fatMASK] |
229 | 230 | ||
230 | sfc_error: |
231 | sfc_error: |
231 | pop esi ebx eax |
232 | pop esi ebx eax |
232 | ret |
233 | ret |
233 | 234 | ||
234 | 235 | ||
235 | get_FAT: |
236 | get_FAT: |
236 | ;-------------------------------- |
237 | ;-------------------------------- |
237 | ; input : EAX = cluster |
238 | ; input : EAX = cluster |
238 | ; output : EAX = next cluster |
239 | ; output : EAX = next cluster |
239 | ;-------------------------------- |
240 | ;-------------------------------- |
240 | push ebx esi |
241 | push ebx esi |
241 | 242 | ||
242 | cmp [fat_type],16 |
243 | cmp [fat_type],16 |
243 | je gfc_1 |
244 | je gfc_1 |
244 | add eax,eax |
245 | add eax,eax |
245 | gfc_1: |
246 | gfc_1: |
246 | add eax,eax |
247 | add eax,eax |
247 | mov esi,511 |
248 | mov esi,511 |
248 | and esi,eax ; esi = position in fat sector |
249 | and esi,eax ; esi = position in fat sector |
249 | shr eax,9 ; eax = fat sector |
250 | shr eax,9 ; eax = fat sector |
250 | add eax,[FAT_START] |
251 | add eax,[FAT_START] |
251 | mov ebx,fat_cache |
252 | mov ebx,fat_cache |
252 | 253 | ||
253 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
254 | cmp eax,[fat_in_cache] ; is fat sector already in memory? |
254 | je gfc_in_cache |
255 | je gfc_in_cache |
255 | 256 | ||
256 | cmp [fat_change],0 ; is fat changed? |
257 | cmp [fat_change],0 ; is fat changed? |
257 | je gfc_no_change ; no |
258 | je gfc_no_change ; no |
258 | call write_fat_sector ; yes. write it into disk |
259 | call write_fat_sector ; yes. write it into disk |
259 | cmp [hd_error],0 |
260 | cmp [hd_error],0 |
260 | jne hd_error_01 |
261 | jne hd_error_01 |
261 | 262 | ||
262 | gfc_no_change: |
263 | gfc_no_change: |
263 | mov [fat_in_cache],eax |
264 | mov [fat_in_cache],eax |
264 | call hd_read |
265 | call hd_read |
265 | cmp [hd_error],0 |
266 | cmp [hd_error],0 |
266 | jne hd_error_01 |
267 | jne hd_error_01 |
267 | 268 | ||
268 | gfc_in_cache: |
269 | gfc_in_cache: |
269 | mov eax,[ebx+esi] |
270 | mov eax,[ebx+esi] |
270 | and eax,[fatMASK] |
271 | and eax,[fatMASK] |
271 | hd_error_01: |
272 | hd_error_01: |
272 | pop esi ebx |
273 | pop esi ebx |
273 | ret |
274 | ret |
274 | 275 | ||
275 | 276 | ||
276 | get_free_FAT: |
277 | get_free_FAT: |
277 | ;----------------------------------------------------------- |
278 | ;----------------------------------------------------------- |
278 | ; input : EAX = # cluster for start the searching |
279 | ; input : EAX = # cluster for start the searching |
279 | ; output : if CARRY=0 EAX = # first cluster found free |
280 | ; output : if CARRY=0 EAX = # first cluster found free |
280 | ; if CARRY=1 disk full |
281 | ; if CARRY=1 disk full |
281 | ; Note : for more speed need to use fat_cache directly |
282 | ; Note : for more speed need to use fat_cache directly |
282 | ;----------------------------------------------------------- |
283 | ;----------------------------------------------------------- |
283 | push ecx |
284 | push ecx |
284 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
285 | mov ecx,[LAST_CLUSTER] ; counter for full disk |
285 | sub ecx,2 |
286 | sub ecx,2 |
286 | 287 | ||
287 | gff_test: |
288 | gff_test: |
288 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
289 | cmp eax,[LAST_CLUSTER] ; if above last cluster start at cluster 2 |
289 | jbe gff_in_range |
290 | jbe gff_in_range |
290 | mov eax,2 |
291 | mov eax,2 |
291 | 292 | ||
292 | gff_in_range: |
293 | gff_in_range: |
293 | push eax |
294 | push eax |
294 | call get_FAT ; get cluster state |
295 | call get_FAT ; get cluster state |
295 | cmp [hd_error],0 |
296 | cmp [hd_error],0 |
296 | jne gff_not_found_1 |
297 | jne gff_not_found_1 |
297 | 298 | ||
298 | test eax,eax ; is it free? |
299 | test eax,eax ; is it free? |
299 | pop eax |
300 | pop eax |
300 | je gff_found ; yes |
301 | je gff_found ; yes |
301 | inc eax ; next cluster |
302 | inc eax ; next cluster |
302 | dec ecx ; is all checked? |
303 | dec ecx ; is all checked? |
303 | jns gff_test ; no |
304 | jns gff_test ; no |
304 | 305 | ||
305 | gff_not_found_1: |
306 | gff_not_found_1: |
306 | add esp,4 |
307 | add esp,4 |
307 | gff_not_found: |
308 | gff_not_found: |
308 | pop ecx ; yes. disk is full |
309 | pop ecx ; yes. disk is full |
309 | stc |
310 | stc |
310 | ret |
311 | ret |
311 | 312 | ||
312 | gff_found: |
313 | gff_found: |
313 | pop ecx |
314 | pop ecx |
314 | clc |
315 | clc |
315 | ret |
316 | ret |
316 | 317 | ||
317 | 318 | ||
318 | write_fat_sector: |
319 | write_fat_sector: |
319 | ;----------------------------------------------------------- |
320 | ;----------------------------------------------------------- |
320 | ; write changed fat to disk |
321 | ; write changed fat to disk |
321 | ;----------------------------------------------------------- |
322 | ;----------------------------------------------------------- |
322 | push eax ebx ecx |
323 | push eax ebx ecx |
323 | 324 | ||
324 | mov [fat_change],0 |
325 | mov [fat_change],0 |
325 | mov eax,[fat_in_cache] |
326 | mov eax,[fat_in_cache] |
326 | cmp eax,-1 |
327 | cmp eax,-1 |
327 | jz write_fat_not_used |
328 | jz write_fat_not_used |
328 | mov ebx,fat_cache |
329 | mov ebx,fat_cache |
329 | mov ecx,[NUMBER_OF_FATS] |
330 | mov ecx,[NUMBER_OF_FATS] |
330 | 331 | ||
331 | write_next_fat: |
332 | write_next_fat: |
332 | call hd_write |
333 | call hd_write |
333 | cmp [hd_error],0 |
334 | cmp [hd_error],0 |
334 | jne write_fat_not_used |
335 | jne write_fat_not_used |
335 | 336 | ||
336 | add eax,[SECTORS_PER_FAT] |
337 | add eax,[SECTORS_PER_FAT] |
337 | dec ecx |
338 | dec ecx |
338 | jnz write_next_fat |
339 | jnz write_next_fat |
339 | 340 | ||
340 | write_fat_not_used: |
341 | write_fat_not_used: |
341 | pop ecx ebx eax |
342 | pop ecx ebx eax |
342 | ret |
343 | ret |
343 | 344 | ||
344 | 345 | ||
345 | analyze_directory: |
346 | analyze_directory: |
346 | ;----------------------------------------------------------- |
347 | ;----------------------------------------------------------- |
347 | ; input : EAX = first cluster of the directory |
348 | ; input : EAX = first cluster of the directory |
348 | ; EBX = pointer to filename |
349 | ; EBX = pointer to filename |
349 | ; output : IF CARRY=0 EAX = sector where th file is found |
350 | ; output : IF CARRY=0 EAX = sector where th file is found |
350 | ; EBX = pointer in buffer |
351 | ; EBX = pointer in buffer |
351 | ; [buffer .. buffer+511] |
352 | ; [buffer .. buffer+511] |
352 | ; ECX,EDX,ESI,EDI not changed |
353 | ; ECX,EDX,ESI,EDI not changed |
353 | ; IF CARRY=1 filename not found |
354 | ; IF CARRY=1 filename not found |
354 | ; Note : if cluster=0 it's changed to read rootdir |
355 | ; Note : if cluster=0 it's changed to read rootdir |
355 | ; save 2 previous directory sectors in longname_sec |
356 | ; save 2 previous directory sectors in longname_sec |
356 | ;----------------------------------------------------------- |
357 | ;----------------------------------------------------------- |
357 | push ecx edx esi edi ebx ; ebx = [esp+0] |
358 | push ecx edx esi edi ebx ; ebx = [esp+0] |
358 | mov [longname_sec1],0 |
359 | mov [longname_sec1],0 |
359 | mov [longname_sec2],0 |
360 | mov [longname_sec2],0 |
360 | 361 | ||
361 | adr_new_cluster: |
362 | adr_new_cluster: |
362 | mov [cluster_tmp],eax |
363 | mov [cluster_tmp],eax |
363 | mov [fat16_root],0 |
364 | mov [fat16_root],0 |
364 | cmp eax,[LAST_CLUSTER] |
365 | cmp eax,[LAST_CLUSTER] |
365 | ja adr_not_found ; too big cluster number, something is wrong |
366 | ja adr_not_found ; too big cluster number, something is wrong |
366 | cmp eax,2 |
367 | cmp eax,2 |
367 | jnb adr_data_cluster |
368 | jnb adr_data_cluster |
368 | 369 | ||
369 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
370 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
370 | cmp [fat_type],16 |
371 | cmp [fat_type],16 |
371 | jne adr_data_cluster |
372 | jne adr_data_cluster |
372 | mov eax,[ROOT_START] |
373 | mov eax,[ROOT_START] |
373 | mov edx,[ROOT_SECTORS] |
374 | mov edx,[ROOT_SECTORS] |
374 | mov [fat16_root],1 ; flag for fat16 rootdir |
375 | mov [fat16_root],1 ; flag for fat16 rootdir |
375 | jmp adr_new_sector |
376 | jmp adr_new_sector |
376 | 377 | ||
377 | adr_data_cluster: |
378 | adr_data_cluster: |
378 | sub eax,2 |
379 | sub eax,2 |
379 | mov edx,[SECTORS_PER_CLUSTER] |
380 | mov edx,[SECTORS_PER_CLUSTER] |
380 | imul eax,edx |
381 | imul eax,edx |
381 | add eax,[DATA_START] |
382 | add eax,[DATA_START] |
382 | 383 | ||
383 | adr_new_sector: |
384 | adr_new_sector: |
384 | mov ebx,buffer |
385 | mov ebx,buffer |
385 | call hd_read |
386 | call hd_read |
386 | cmp [hd_error],0 |
387 | cmp [hd_error],0 |
387 | jne adr_not_found |
388 | jne adr_not_found |
388 | 389 | ||
389 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
390 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
390 | 391 | ||
391 | adr_analyze: |
392 | adr_analyze: |
392 | mov edi,[ebx+11] ; file attribute |
393 | mov edi,[ebx+11] ; file attribute |
393 | and edi,0xf |
394 | and edi,0xf |
394 | cmp edi,0xf |
395 | cmp edi,0xf |
395 | je adr_long_filename |
396 | je adr_long_filename |
396 | test edi,0x8 ; skip over volume label |
397 | test edi,0x8 ; skip over volume label |
397 | jne adr_long_filename ; Note: label can be same name as file/dir |
398 | jne adr_long_filename ; Note: label can be same name as file/dir |
398 | 399 | ||
399 | mov esi,[esp+0] ; filename need to be uppercase |
400 | mov esi,[esp+0] ; filename need to be uppercase |
400 | mov edi,ebx |
401 | mov edi,ebx |
401 | push ecx |
402 | push ecx |
402 | mov ecx,11 |
403 | mov ecx,11 |
403 | cld |
404 | cld |
404 | rep cmpsb ; compare 8+3 filename |
405 | rep cmpsb ; compare 8+3 filename |
405 | pop ecx |
406 | pop ecx |
406 | je adr_found |
407 | je adr_found |
407 | 408 | ||
408 | adr_long_filename: |
409 | adr_long_filename: |
409 | add ebx,32 ; position of next dir entry |
410 | add ebx,32 ; position of next dir entry |
410 | dec ecx |
411 | dec ecx |
411 | jnz adr_analyze |
412 | jnz adr_analyze |
412 | 413 | ||
413 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
414 | mov ecx,[longname_sec1] ; save 2 previous directory sectors |
414 | mov [longname_sec1],eax ; for delete long filename |
415 | mov [longname_sec1],eax ; for delete long filename |
415 | mov [longname_sec2],ecx |
416 | mov [longname_sec2],ecx |
416 | inc eax ; next sector |
417 | inc eax ; next sector |
417 | dec edx |
418 | dec edx |
418 | jne adr_new_sector |
419 | jne adr_new_sector |
419 | cmp [fat16_root],1 ; end of fat16 rootdir |
420 | cmp [fat16_root],1 ; end of fat16 rootdir |
420 | je adr_not_found |
421 | je adr_not_found |
421 | 422 | ||
422 | adr_next_cluster: |
423 | adr_next_cluster: |
423 | mov eax,[cluster_tmp] |
424 | mov eax,[cluster_tmp] |
424 | call get_FAT ; get next cluster |
425 | call get_FAT ; get next cluster |
425 | cmp [hd_error],0 |
426 | cmp [hd_error],0 |
426 | jne adr_not_found |
427 | jne adr_not_found |
427 | 428 | ||
428 | cmp eax,2 ; incorrect fat chain? |
429 | cmp eax,2 ; incorrect fat chain? |
429 | jb adr_not_found ; yes |
430 | jb adr_not_found ; yes |
430 | cmp eax,[fatRESERVED] ; is it end of directory? |
431 | cmp eax,[fatRESERVED] ; is it end of directory? |
431 | jb adr_new_cluster ; no. analyse it |
432 | jb adr_new_cluster ; no. analyse it |
432 | 433 | ||
433 | adr_not_found: |
434 | adr_not_found: |
434 | pop edi edi esi edx ecx ; first edi will remove ebx |
435 | pop edi edi esi edx ecx ; first edi will remove ebx |
435 | stc ; file not found |
436 | stc ; file not found |
436 | ret |
437 | ret |
437 | 438 | ||
438 | adr_found: |
439 | adr_found: |
439 | pop edi edi esi edx ecx ; first edi will remove ebx |
440 | pop edi edi esi edx ecx ; first edi will remove ebx |
440 | clc ; file found |
441 | clc ; file found |
441 | ret |
442 | ret |
442 | 443 | ||
443 | 444 | ||
444 | analyze_directory_to_write: |
445 | analyze_directory_to_write: |
445 | ;----------------------------------------------------------- |
446 | ;----------------------------------------------------------- |
446 | ; input : EAX = first cluster of the directory |
447 | ; input : EAX = first cluster of the directory |
447 | ; output : IF CARRY=0 EAX = sector where the empty pos is found |
448 | ; output : IF CARRY=0 EAX = sector where the empty pos is found |
448 | ; EBX = pointer in buffer |
449 | ; EBX = pointer in buffer |
449 | ; [buffer .. buffer+511] |
450 | ; [buffer .. buffer+511] |
450 | ; ECX,EDX,ESI,EDI not changed |
451 | ; ECX,EDX,ESI,EDI not changed |
451 | ; IF CARRY=1 disk full or fat corrupted |
452 | ; IF CARRY=1 disk full or fat corrupted |
452 | ; Note : if cluster=0 it's changed to read rootdir |
453 | ; Note : if cluster=0 it's changed to read rootdir |
453 | ;----------------------------------------------------------- |
454 | ;----------------------------------------------------------- |
454 | push ecx edx edi |
455 | push ecx edx edi |
455 | 456 | ||
456 | adw_new_cluster: |
457 | adw_new_cluster: |
457 | mov [cluster_tmp],eax |
458 | mov [cluster_tmp],eax |
458 | mov [fat16_root],0 |
459 | mov [fat16_root],0 |
459 | cmp eax,[LAST_CLUSTER] |
460 | cmp eax,[LAST_CLUSTER] |
460 | ja adw_not_found ; too big cluster number, something is wrong |
461 | ja adw_not_found ; too big cluster number, something is wrong |
461 | cmp eax,2 |
462 | cmp eax,2 |
462 | jnb adw_data_cluster |
463 | jnb adw_data_cluster |
463 | 464 | ||
464 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
465 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
465 | cmp [fat_type],16 |
466 | cmp [fat_type],16 |
466 | jne adw_data_cluster |
467 | jne adw_data_cluster |
467 | mov eax,[ROOT_START] |
468 | mov eax,[ROOT_START] |
468 | mov edx,[ROOT_SECTORS] |
469 | mov edx,[ROOT_SECTORS] |
469 | mov [fat16_root],1 ; flag for fat16 rootdir |
470 | mov [fat16_root],1 ; flag for fat16 rootdir |
470 | jmp adw_new_sector |
471 | jmp adw_new_sector |
471 | 472 | ||
472 | adw_data_cluster: |
473 | adw_data_cluster: |
473 | sub eax,2 |
474 | sub eax,2 |
474 | mov edx,[SECTORS_PER_CLUSTER] |
475 | mov edx,[SECTORS_PER_CLUSTER] |
475 | imul eax,edx |
476 | imul eax,edx |
476 | add eax,[DATA_START] |
477 | add eax,[DATA_START] |
477 | 478 | ||
478 | adw_new_sector: |
479 | adw_new_sector: |
479 | mov ebx,buffer |
480 | mov ebx,buffer |
480 | call hd_read |
481 | call hd_read |
481 | cmp [hd_error],0 |
482 | cmp [hd_error],0 |
482 | jne adw_not_found |
483 | jne adw_not_found |
483 | 484 | ||
484 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
485 | mov ecx,512/32 ; count of dir entrys per sector = 16 |
485 | 486 | ||
486 | adw_analyze: |
487 | adw_analyze: |
487 | cmp byte [ebx],0x00 ; is free entry? |
488 | cmp byte [ebx],0x00 ; is free entry? |
488 | je adw_found ; yes |
489 | je adw_found ; yes |
489 | cmp byte [ebx],0xe5 ; is deleted entry? |
490 | cmp byte [ebx],0xe5 ; is deleted entry? |
490 | je adw_found ; yes |
491 | je adw_found ; yes |
491 | add ebx,32 ; position of next dir entry |
492 | add ebx,32 ; position of next dir entry |
492 | dec ecx |
493 | dec ecx |
493 | jnz adw_analyze |
494 | jnz adw_analyze |
494 | 495 | ||
495 | inc eax ; next sector |
496 | inc eax ; next sector |
496 | dec edx |
497 | dec edx |
497 | jne adw_new_sector |
498 | jne adw_new_sector |
498 | cmp [fat16_root],1 ; end of fat16 rootdir |
499 | cmp [fat16_root],1 ; end of fat16 rootdir |
499 | je adw_not_found |
500 | je adw_not_found |
500 | 501 | ||
501 | mov eax,[cluster_tmp] |
502 | mov eax,[cluster_tmp] |
502 | call get_FAT ; get next cluster |
503 | call get_FAT ; get next cluster |
503 | cmp [hd_error],0 |
504 | cmp [hd_error],0 |
504 | jne adw_not_found |
505 | jne adw_not_found |
505 | 506 | ||
506 | cmp eax,2 ; incorrect fat chain? |
507 | cmp eax,2 ; incorrect fat chain? |
507 | jb adw_not_found ; yes |
508 | jb adw_not_found ; yes |
508 | cmp eax,[fatRESERVED] ; is it end of directory? |
509 | cmp eax,[fatRESERVED] ; is it end of directory? |
509 | jb adw_new_cluster ; no. analyse it |
510 | jb adw_new_cluster ; no. analyse it |
510 | 511 | ||
511 | mov eax,2 ; this block of code add a new cluster |
512 | mov eax,2 ; this block of code add a new cluster |
512 | call get_free_FAT ; for the directory because the directory |
513 | call get_free_FAT ; for the directory because the directory |
513 | jc adw_not_found ; is full |
514 | jc adw_not_found ; is full |
514 | 515 | ||
515 | mov edx,[fatEND] ; new end for directory |
516 | mov edx,[fatEND] ; new end for directory |
516 | call set_FAT |
517 | call set_FAT |
517 | cmp [hd_error],0 |
518 | cmp [hd_error],0 |
518 | jne adw_not_found |
519 | jne adw_not_found |
519 | 520 | ||
520 | push eax ; save new cluster |
521 | push eax ; save new cluster |
521 | mov edx,eax |
522 | mov edx,eax |
522 | mov eax,[cluster_tmp] ; change last cluster to point new cluster |
523 | mov eax,[cluster_tmp] ; change last cluster to point new cluster |
523 | mov [f_del],1 |
524 | mov [f_del],1 |
524 | call set_FAT |
525 | call set_FAT |
525 | cmp [hd_error],0 |
526 | cmp [hd_error],0 |
526 | jne adw_not_found_1 |
527 | jne adw_not_found_1 |
527 | 528 | ||
528 | mov [f_del],0 |
529 | mov [f_del],0 |
529 | 530 | ||
530 | mov ecx,-1 ; remove 1 cluster from free disk space |
531 | mov ecx,-1 ; remove 1 cluster from free disk space |
531 | call add_disk_free_space |
532 | call add_disk_free_space |
532 | cmp [hd_error],0 |
533 | cmp [hd_error],0 |
533 | jne adw_not_found_1 |
534 | jne adw_not_found_1 |
534 | 535 | ||
535 | mov ecx,512/4 |
536 | mov ecx,512/4 |
536 | xor eax,eax |
537 | xor eax,eax |
537 | mov edi,buffer |
538 | mov edi,buffer |
538 | cld |
539 | cld |
539 | rep stosd ; clear new directory cluster |
540 | rep stosd ; clear new directory cluster |
540 | pop eax |
541 | pop eax |
541 | 542 | ||
542 | sub eax,2 |
543 | sub eax,2 |
543 | mov ecx,[SECTORS_PER_CLUSTER] |
544 | mov ecx,[SECTORS_PER_CLUSTER] |
544 | imul eax,ecx |
545 | imul eax,ecx |
545 | add eax,[DATA_START] |
546 | add eax,[DATA_START] |
546 | mov ebx,buffer |
547 | mov ebx,buffer |
547 | push eax ; save sector number |
548 | push eax ; save sector number |
548 | 549 | ||
549 | adw_set_empty_directory: |
550 | adw_set_empty_directory: |
550 | call hd_write |
551 | call hd_write |
551 | cmp [hd_error],0 |
552 | cmp [hd_error],0 |
552 | jne adw_not_found_1 |
553 | jne adw_not_found_1 |
553 | 554 | ||
554 | inc eax ; next sector |
555 | inc eax ; next sector |
555 | dec ecx |
556 | dec ecx |
556 | jnz adw_set_empty_directory |
557 | jnz adw_set_empty_directory |
557 | 558 | ||
558 | pop eax |
559 | pop eax |
559 | 560 | ||
560 | adw_found: |
561 | adw_found: |
561 | pop edi edx ecx |
562 | pop edi edx ecx |
562 | clc ; free space found |
563 | clc ; free space found |
563 | ret |
564 | ret |
564 | adw_not_found_1: |
565 | adw_not_found_1: |
565 | add esp,4 |
566 | add esp,4 |
566 | adw_not_found: |
567 | adw_not_found: |
567 | pop edi edx ecx |
568 | pop edi edx ecx |
568 | stc ; free space not found |
569 | stc ; free space not found |
569 | ret |
570 | ret |
570 | 571 | ||
571 | 572 | ||
572 | get_data_cluster: |
573 | get_data_cluster: |
573 | ;----------------------------------------------------------- |
574 | ;----------------------------------------------------------- |
574 | ; input : EAX = cluster |
575 | ; input : EAX = cluster |
575 | ; EBX = pointer to buffer |
576 | ; EBX = pointer to buffer |
576 | ; EDX = # blocks to read in buffer |
577 | ; EDX = # blocks to read in buffer |
577 | ; ESI = # blocks to skip over |
578 | ; ESI = # blocks to skip over |
578 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
579 | ; output : if CARRY=0 ok EBX/EDX/ESI updated |
579 | ; if CARRY=1 cluster out of range |
580 | ; if CARRY=1 cluster out of range |
580 | ; Note : if cluster=0 it's changed to read rootdir |
581 | ; Note : if cluster=0 it's changed to read rootdir |
581 | ;----------------------------------------------------------- |
582 | ;----------------------------------------------------------- |
582 | push eax ecx |
583 | push eax ecx |
583 | 584 | ||
584 | mov [fat16_root],0 |
585 | mov [fat16_root],0 |
585 | cmp eax,[LAST_CLUSTER] |
586 | cmp eax,[LAST_CLUSTER] |
586 | ja gdc_error ; too big cluster number, something is wrong |
587 | ja gdc_error ; too big cluster number, something is wrong |
587 | cmp eax,2 |
588 | cmp eax,2 |
588 | jnb gdc_cluster |
589 | jnb gdc_cluster |
589 | 590 | ||
590 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
591 | mov eax,[ROOT_CLUSTER] ; if cluster < 2 then read rootdir |
591 | cmp [fat_type],16 |
592 | cmp [fat_type],16 |
592 | jne gdc_cluster |
593 | jne gdc_cluster |
593 | mov eax,[ROOT_START] |
594 | mov eax,[ROOT_START] |
594 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
595 | mov ecx,[ROOT_SECTORS] ; Note: not cluster size |
595 | mov [fat16_root],1 ; flag for fat16 rootdir |
596 | mov [fat16_root],1 ; flag for fat16 rootdir |
596 | jmp gdc_read |
597 | jmp gdc_read |
597 | 598 | ||
598 | gdc_cluster: |
599 | gdc_cluster: |
599 | sub eax,2 |
600 | sub eax,2 |
600 | mov ecx,[SECTORS_PER_CLUSTER] |
601 | mov ecx,[SECTORS_PER_CLUSTER] |
601 | imul eax,ecx |
602 | imul eax,ecx |
602 | add eax,[DATA_START] |
603 | add eax,[DATA_START] |
603 | 604 | ||
604 | gdc_read: |
605 | gdc_read: |
605 | test esi,esi ; first wanted block |
606 | test esi,esi ; first wanted block |
606 | je gdcl1 ; yes, skip count is 0 |
607 | je gdcl1 ; yes, skip count is 0 |
607 | dec esi |
608 | dec esi |
608 | jmp gdcl2 |
609 | jmp gdcl2 |
609 | 610 | ||
610 | gdcl1: |
611 | gdcl1: |
611 | call hd_read |
612 | call hd_read |
612 | cmp [hd_error],0 |
613 | cmp [hd_error],0 |
613 | jne gdc_error |
614 | jne gdc_error |
614 | 615 | ||
615 | add ebx,512 ; update pointer |
616 | add ebx,512 ; update pointer |
616 | dec edx |
617 | dec edx |
617 | 618 | ||
618 | gdcl2: |
619 | gdcl2: |
619 | test edx,edx ; is all read? |
620 | test edx,edx ; is all read? |
620 | je out_of_read |
621 | je out_of_read |
621 | 622 | ||
622 | inc eax ; next sector |
623 | inc eax ; next sector |
623 | dec ecx |
624 | dec ecx |
624 | jnz gdc_read |
625 | jnz gdc_read |
625 | 626 | ||
626 | out_of_read: |
627 | out_of_read: |
627 | pop ecx eax |
628 | pop ecx eax |
628 | clc |
629 | clc |
629 | ret |
630 | ret |
630 | 631 | ||
631 | gdc_error: |
632 | gdc_error: |
632 | pop ecx eax |
633 | pop ecx eax |
633 | stc |
634 | stc |
634 | ret |
635 | ret |
635 | 636 | ||
636 | 637 | ||
637 | set_data_cluster: |
638 | set_data_cluster: |
638 | ;----------------------------------------------------------- |
639 | ;----------------------------------------------------------- |
639 | ; input : EAX = cluster |
640 | ; input : EAX = cluster |
640 | ; EBX = pointer to buffer |
641 | ; EBX = pointer to buffer |
641 | ; output : if CARRY=0 ok |
642 | ; output : if CARRY=0 ok |
642 | ; if CARRY=1 cluster out of range |
643 | ; if CARRY=1 cluster out of range |
643 | ;----------------------------------------------------------- |
644 | ;----------------------------------------------------------- |
644 | push eax ebx edx |
645 | push eax ebx edx |
645 | 646 | ||
646 | cmp eax,[LAST_CLUSTER] |
647 | cmp eax,[LAST_CLUSTER] |
647 | ja sdc_error ; too big cluster number, something is wrong |
648 | ja sdc_error ; too big cluster number, something is wrong |
648 | sub eax,2 |
649 | sub eax,2 |
649 | jb sdc_error ; don't allow rootdir write |
650 | jb sdc_error ; don't allow rootdir write |
650 | 651 | ||
651 | mov edx,[SECTORS_PER_CLUSTER] |
652 | mov edx,[SECTORS_PER_CLUSTER] |
652 | imul eax,edx |
653 | imul eax,edx |
653 | add eax,[DATA_START] |
654 | add eax,[DATA_START] |
654 | 655 | ||
655 | sdc_write: |
656 | sdc_write: |
656 | call hd_write |
657 | call hd_write |
657 | cmp [hd_error],0 |
658 | cmp [hd_error],0 |
658 | jne sdc_error |
659 | jne sdc_error |
659 | 660 | ||
660 | add ebx,512 ; update pointer |
661 | add ebx,512 ; update pointer |
661 | inc eax |
662 | inc eax |
662 | dec edx |
663 | dec edx |
663 | jnz sdc_write |
664 | jnz sdc_write |
664 | pop edx ebx eax |
665 | pop edx ebx eax |
665 | clc |
666 | clc |
666 | ret |
667 | ret |
667 | 668 | ||
668 | sdc_error: |
669 | sdc_error: |
669 | pop edx ebx eax |
670 | pop edx ebx eax |
670 | stc |
671 | stc |
671 | ret |
672 | ret |
672 | 673 | ||
673 | 674 | ||
674 | get_cluster_of_a_path: |
675 | get_cluster_of_a_path: |
675 | ;--------------------------------------------------------- |
676 | ;--------------------------------------------------------- |
676 | ; input : EBX = pointer to a path string |
677 | ; input : EBX = pointer to a path string |
677 | ; (example: the path "/files/data/document" become |
678 | ; (example: the path "/files/data/document" become |
678 | ; "files......data.......document...0" |
679 | ; "files......data.......document...0" |
679 | ; '.' = space char |
680 | ; '.' = space char |
680 | ; '0' = char(0) (ASCII=0) !!! ) |
681 | ; '0' = char(0) (ASCII=0) !!! ) |
681 | ; output : if (CARRY=1) -> ERROR in the PATH |
682 | ; output : if (CARRY=1) -> ERROR in the PATH |
682 | ; if (CARRY=0) -> EAX=cluster |
683 | ; if (CARRY=0) -> EAX=cluster |
683 | ;--------------------------------------------------------- |
684 | ;--------------------------------------------------------- |
684 | push ebx edx |
685 | push ebx edx |
685 | 686 | ||
686 | mov eax,[ROOT_CLUSTER] |
687 | mov eax,[ROOT_CLUSTER] |
687 | mov edx,ebx |
688 | mov edx,ebx |
688 | 689 | ||
689 | search_end_of_path: |
690 | search_end_of_path: |
690 | cmp byte [edx],0 |
691 | cmp byte [edx],0 |
691 | je found_end_of_path |
692 | je found_end_of_path |
692 | 693 | ||
693 | inc edx ; '/' |
694 | inc edx ; '/' |
694 | mov ebx,edx |
695 | mov ebx,edx |
695 | call analyze_directory |
696 | call analyze_directory |
696 | jc directory_not_found |
697 | jc directory_not_found |
697 | 698 | ||
698 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
699 | mov eax,[ebx+20-2] ; read the HIGH 16bit cluster field |
699 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
700 | mov ax,[ebx+26] ; read the LOW 16bit cluster field |
700 | and eax,[fatMASK] |
701 | and eax,[fatMASK] |
701 | add edx,11 ; 8+3 (name+extension) |
702 | add edx,11 ; 8+3 (name+extension) |
702 | jmp search_end_of_path |
703 | jmp search_end_of_path |
703 | 704 | ||
704 | found_end_of_path: |
705 | found_end_of_path: |
705 | pop edx ebx |
706 | pop edx ebx |
706 | clc ; no errors |
707 | clc ; no errors |
707 | ret |
708 | ret |
708 | 709 | ||
709 | directory_not_found: |
710 | directory_not_found: |
710 | pop edx ebx |
711 | pop edx ebx |
711 | stc ; errors occour |
712 | stc ; errors occour |
712 | ret |
713 | ret |
713 | 714 | ||
714 | 715 | ||
715 | bcd2bin: |
716 | bcd2bin: |
716 | ;---------------------------------- |
717 | ;---------------------------------- |
717 | ; input : AL=BCD number (eg. 0x11) |
718 | ; input : AL=BCD number (eg. 0x11) |
718 | ; output : AH=0 |
719 | ; output : AH=0 |
719 | ; AL=decimal number (eg. 11) |
720 | ; AL=decimal number (eg. 11) |
720 | ;---------------------------------- |
721 | ;---------------------------------- |
721 | xor ah,ah |
722 | xor ah,ah |
722 | shl ax,4 |
723 | shl ax,4 |
723 | shr al,4 |
724 | shr al,4 |
724 | aad |
725 | aad |
725 | ret |
726 | ret |
726 | 727 | ||
727 | 728 | ||
728 | get_date_for_file: |
729 | get_date_for_file: |
729 | ;----------------------------------------------------- |
730 | ;----------------------------------------------------- |
730 | ; Get date from CMOS and pack day,month,year in AX |
731 | ; Get date from CMOS and pack day,month,year in AX |
731 | ; DATE bits 0..4 : day of month 0..31 |
732 | ; DATE bits 0..4 : day of month 0..31 |
732 | ; 5..8 : month of year 1..12 |
733 | ; 5..8 : month of year 1..12 |
733 | ; 9..15 : count of years from 1980 |
734 | ; 9..15 : count of years from 1980 |
734 | ;----------------------------------------------------- |
735 | ;----------------------------------------------------- |
735 | mov al,0x7 ;day |
736 | mov al,0x7 ;day |
736 | out 0x70,al |
737 | out 0x70,al |
737 | in al,0x71 |
738 | in al,0x71 |
738 | call bcd2bin |
739 | call bcd2bin |
739 | ror eax,5 |
740 | ror eax,5 |
740 | 741 | ||
741 | mov al,0x8 ;month |
742 | mov al,0x8 ;month |
742 | out 0x70,al |
743 | out 0x70,al |
743 | in al,0x71 |
744 | in al,0x71 |
744 | call bcd2bin |
745 | call bcd2bin |
745 | ror eax,4 |
746 | ror eax,4 |
746 | 747 | ||
747 | mov al,0x9 ;year |
748 | mov al,0x9 ;year |
748 | out 0x70,al |
749 | out 0x70,al |
749 | in al,0x71 |
750 | in al,0x71 |
750 | call bcd2bin |
751 | call bcd2bin |
751 | add ax,20 ;because CMOS return only the two last |
752 | add ax,20 ;because CMOS return only the two last |
752 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
753 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
753 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
754 | rol eax,9 ;need the difference with 1980 (eg. 2001-1980) |
754 | ret |
755 | ret |
755 | 756 | ||
756 | 757 | ||
757 | get_time_for_file: |
758 | get_time_for_file: |
758 | ;----------------------------------------------------- |
759 | ;----------------------------------------------------- |
759 | ; Get time from CMOS and pack hour,minute,second in AX |
760 | ; Get time from CMOS and pack hour,minute,second in AX |
760 | ; TIME bits 0..4 : second (the low bit is lost) |
761 | ; TIME bits 0..4 : second (the low bit is lost) |
761 | ; 5..10 : minute 0..59 |
762 | ; 5..10 : minute 0..59 |
762 | ; 11..15 : hour 0..23 |
763 | ; 11..15 : hour 0..23 |
763 | ;----------------------------------------------------- |
764 | ;----------------------------------------------------- |
764 | mov al,0x0 ;second |
765 | mov al,0x0 ;second |
765 | out 0x70,al |
766 | out 0x70,al |
766 | in al,0x71 |
767 | in al,0x71 |
767 | call bcd2bin |
768 | call bcd2bin |
768 | ror eax,6 |
769 | ror eax,6 |
769 | 770 | ||
770 | mov al,0x2 ;minute |
771 | mov al,0x2 ;minute |
771 | out 0x70,al |
772 | out 0x70,al |
772 | in al,0x71 |
773 | in al,0x71 |
773 | call bcd2bin |
774 | call bcd2bin |
774 | ror eax,6 |
775 | ror eax,6 |
775 | 776 | ||
776 | mov al,0x4 ;hour |
777 | mov al,0x4 ;hour |
777 | out 0x70,al |
778 | out 0x70,al |
778 | in al,0x71 |
779 | in al,0x71 |
779 | call bcd2bin |
780 | call bcd2bin |
780 | rol eax,11 |
781 | rol eax,11 |
781 | ret |
782 | ret |
782 | 783 | ||
783 | 784 | ||
784 | set_current_time_for_entry: |
785 | set_current_time_for_entry: |
785 | ;----------------------------------------------------- |
786 | ;----------------------------------------------------- |
786 | ; Set current time/date for file entry |
787 | ; Set current time/date for file entry |
787 | ; input : ebx = file entry pointer |
788 | ; input : ebx = file entry pointer |
788 | ;----------------------------------------------------- |
789 | ;----------------------------------------------------- |
789 | push eax |
790 | push eax |
790 | call get_time_for_file ; update files date/time |
791 | call get_time_for_file ; update files date/time |
791 | mov [ebx+22],ax |
792 | mov [ebx+22],ax |
792 | call get_date_for_file |
793 | call get_date_for_file |
793 | mov [ebx+24],ax |
794 | mov [ebx+24],ax |
794 | pop eax |
795 | pop eax |
795 | ret |
796 | ret |
796 | 797 | ||
797 | 798 | ||
798 | makedir: |
799 | makedir: |
799 | ;----------------------------------------------------- |
800 | ;----------------------------------------------------- |
800 | ; input : eax = directory name |
801 | ; input : eax = directory name |
801 | ; edx = path |
802 | ; edx = path |
802 | ; output : eax = 0 - ok |
803 | ; output : eax = 0 - ok |
803 | ; 3 - unknown FS |
804 | ; 3 - unknown FS |
804 | ; 5 - file not found |
805 | ; 5 - file not found |
805 | ; 8 - disk full |
806 | ; 8 - disk full |
806 | ; 10 - access denied |
807 | ; 10 - access denied |
807 | ; Note : can only make one directory at time |
808 | ; Note : can only make one directory at time |
808 | ;----------------------------------------------------- |
809 | ;----------------------------------------------------- |
809 | cmp [fat_type],0 |
810 | cmp [fat_type],0 |
810 | jnz make_dir_fat_ok |
811 | jnz make_dir_fat_ok |
811 | mov eax,ERROR_UNKNOWN_FS |
812 | mov eax,ERROR_UNKNOWN_FS |
812 | ret |
813 | ret |
813 | 814 | ||
814 | make_dir_fat_ok: |
815 | make_dir_fat_ok: |
815 | ; call reserve_hd1 |
816 | ; call reserve_hd1 |
816 | 817 | ||
817 | pushad |
818 | pushad |
818 | 819 | ||
819 | mov ebx,edx |
820 | mov ebx,edx |
820 | call get_cluster_of_a_path |
821 | call get_cluster_of_a_path |
821 | jnc make_dir_found_path |
822 | jnc make_dir_found_path |
822 | cmp [hd_error],0 |
823 | cmp [hd_error],0 |
823 | jne make_dir_error_1 |
824 | jne make_dir_error_1 |
824 | 825 | ||
825 | make_dir_path_not_found: |
826 | make_dir_path_not_found: |
826 | popad |
827 | popad |
827 | call update_disk ; write all of cache and fat to hd |
828 | call update_disk ; write all of cache and fat to hd |
828 | cmp [hd_error],0 |
829 | cmp [hd_error],0 |
829 | jne make_dir_error_2 |
830 | jne make_dir_error_2 |
830 | 831 | ||
831 | mov [hd1_status],0 |
832 | mov [hd1_status],0 |
832 | mov eax,ERROR_FILE_NOT_FOUND |
833 | mov eax,ERROR_FILE_NOT_FOUND |
833 | ret |
834 | ret |
834 | 835 | ||
835 | make_dir_disk_full: |
836 | make_dir_disk_full: |
836 | cmp [hd_error],0 |
837 | cmp [hd_error],0 |
837 | jne make_dir_error_1 |
838 | jne make_dir_error_1 |
838 | popad |
839 | popad |
839 | call update_disk ; write all of cache and fat to hd |
840 | call update_disk ; write all of cache and fat to hd |
840 | cmp [hd_error],0 |
841 | cmp [hd_error],0 |
841 | jne make_dir_error_2 |
842 | jne make_dir_error_2 |
842 | 843 | ||
843 | mov [hd1_status],0 |
844 | mov [hd1_status],0 |
844 | mov eax,ERROR_DISK_FULL |
845 | mov eax,ERROR_DISK_FULL |
845 | ret |
846 | ret |
846 | 847 | ||
847 | make_dir_already_exist: |
848 | make_dir_already_exist: |
848 | cmp [hd_error],0 |
849 | cmp [hd_error],0 |
849 | jne make_dir_error_1 |
850 | jne make_dir_error_1 |
850 | mov eax,[cluster] ; directory cluster |
851 | mov eax,[cluster] ; directory cluster |
851 | xor edx,edx ; free |
852 | xor edx,edx ; free |
852 | mov [f_del],1 |
853 | mov [f_del],1 |
853 | call set_FAT |
854 | call set_FAT |
854 | cmp [hd_error],0 |
855 | cmp [hd_error],0 |
855 | jne make_dir_error_1 |
856 | jne make_dir_error_1 |
856 | 857 | ||
857 | mov [f_del],0 |
858 | mov [f_del],0 |
858 | 859 | ||
859 | popad |
860 | popad |
860 | call update_disk ; write all of cache and fat to hd |
861 | call update_disk ; write all of cache and fat to hd |
861 | make_dir_error_2: |
862 | make_dir_error_2: |
862 | mov [hd1_status],0 |
863 | mov [hd1_status],0 |
863 | mov eax,ERROR_ACCESS_DENIED |
864 | mov eax,ERROR_ACCESS_DENIED |
864 | ret |
865 | ret |
865 | 866 | ||
866 | make_dir_error_1: |
867 | make_dir_error_1: |
867 | popad |
868 | popad |
868 | jmp make_dir_error_2 |
869 | jmp make_dir_error_2 |
869 | 870 | ||
870 | make_dir_error_3: |
871 | make_dir_error_3: |
871 | add esp,4 |
872 | add esp,4 |
872 | jmp make_dir_error_1 |
873 | jmp make_dir_error_1 |
873 | 874 | ||
874 | make_dir_found_path: |
875 | make_dir_found_path: |
875 | cmp eax,[ROOT_CLUSTER] |
876 | cmp eax,[ROOT_CLUSTER] |
876 | jnz make_dir_not_root |
877 | jnz make_dir_not_root |
877 | xor eax,eax |
878 | xor eax,eax |
878 | 879 | ||
879 | make_dir_not_root: |
880 | make_dir_not_root: |
880 | mov ecx,eax ; directorys start cluster |
881 | mov ecx,eax ; directorys start cluster |
881 | mov word [NewDirEntry2+26],cx ; 16 bits low of cluster |
882 | mov word [NewDirEntry2+26],cx ; 16 bits low of cluster |
882 | shr ecx,16 |
883 | shr ecx,16 |
883 | mov word [NewDirEntry2+20],cx ; 16 bits high of cluster (=0 fat16) |
884 | mov word [NewDirEntry2+20],cx ; 16 bits high of cluster (=0 fat16) |
884 | 885 | ||
885 | push eax ; save parent directory cluster |
886 | push eax ; save parent directory cluster |
886 | mov eax,2 |
887 | mov eax,2 |
887 | call get_free_FAT |
888 | call get_free_FAT |
888 | mov [cluster],eax ; first free cluster |
889 | mov [cluster],eax ; first free cluster |
889 | pop eax |
890 | pop eax |
890 | jc make_dir_disk_full |
891 | jc make_dir_disk_full |
891 | 892 | ||
892 | push eax |
893 | push eax |
893 | mov eax,[cluster] ; directory cluster |
894 | mov eax,[cluster] ; directory cluster |
894 | mov edx,[fatEND] ; end for directory |
895 | mov edx,[fatEND] ; end for directory |
895 | call set_FAT |
896 | call set_FAT |
896 | cmp [hd_error],0 |
897 | cmp [hd_error],0 |
897 | jne make_dir_error_3 |
898 | jne make_dir_error_3 |
898 | pop eax |
899 | pop eax |
899 | 900 | ||
900 | mov ebx,PUSHAD_EAX ; dir name |
901 | mov ebx,PUSHAD_EAX ; dir name |
901 | push eax |
902 | push eax |
902 | call analyze_directory ; check if directory already exist |
903 | call analyze_directory ; check if directory already exist |
903 | cmp [hd_error],0 |
904 | cmp [hd_error],0 |
904 | jne make_dir_error_1 |
905 | jne make_dir_error_1 |
905 | 906 | ||
906 | pop eax |
907 | pop eax |
907 | jnc make_dir_already_exist ; need to free allocated cluster! |
908 | jnc make_dir_already_exist ; need to free allocated cluster! |
908 | 909 | ||
909 | call analyze_directory_to_write |
910 | call analyze_directory_to_write |
910 | jc make_dir_already_exist ; need to free allocated cluster! |
911 | jc make_dir_already_exist ; need to free allocated cluster! |
911 | 912 | ||
912 | mov esi,PUSHAD_EAX ; dir name |
913 | mov esi,PUSHAD_EAX ; dir name |
913 | mov edi,ebx ; pointer in buffer |
914 | mov edi,ebx ; pointer in buffer |
914 | mov ecx,11 |
915 | mov ecx,11 |
915 | cld |
916 | cld |
916 | rep movsb |
917 | rep movsb |
917 | 918 | ||
918 | mov dword [ebx+28],0 ; dir size is always 0 |
919 | mov dword [ebx+28],0 ; dir size is always 0 |
919 | mov ecx,[cluster] |
920 | mov ecx,[cluster] |
920 | mov [ebx+26],cx ; 16 bits low of cluster |
921 | mov [ebx+26],cx ; 16 bits low of cluster |
921 | mov word [NewDirEntry1+26],cx |
922 | mov word [NewDirEntry1+26],cx |
922 | shr ecx,16 |
923 | shr ecx,16 |
923 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
924 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
924 | mov word [NewDirEntry1+20],cx |
925 | mov word [NewDirEntry1+20],cx |
925 | mov byte [ebx+11],0x10 ; attribute = directory |
926 | mov byte [ebx+11],0x10 ; attribute = directory |
926 | 927 | ||
927 | call set_current_time_for_entry |
928 | call set_current_time_for_entry |
928 | mov ecx,[ebx+22] |
929 | mov ecx,[ebx+22] |
929 | mov dword [NewDirEntry1+22],ecx |
930 | mov dword [NewDirEntry1+22],ecx |
930 | mov dword [NewDirEntry2+22],ecx |
931 | mov dword [NewDirEntry2+22],ecx |
931 | 932 | ||
932 | mov ebx,buffer ; save the directory name,length,cluster |
933 | mov ebx,buffer ; save the directory name,length,cluster |
933 | call hd_write |
934 | call hd_write |
934 | cmp [hd_error],0 |
935 | cmp [hd_error],0 |
935 | jne make_dir_error_1 |
936 | jne make_dir_error_1 |
936 | 937 | ||
937 | mov ecx,512/4 |
938 | mov ecx,512/4 |
938 | xor eax,eax |
939 | xor eax,eax |
939 | mov edi,buffer |
940 | mov edi,buffer |
940 | cld |
941 | cld |
941 | rep stosd ; clear new directory cluster |
942 | rep stosd ; clear new directory cluster |
942 | 943 | ||
943 | mov eax,[cluster] ; new directory cluster |
944 | mov eax,[cluster] ; new directory cluster |
944 | sub eax,2 |
945 | sub eax,2 |
945 | mov edx,[SECTORS_PER_CLUSTER] |
946 | mov edx,[SECTORS_PER_CLUSTER] |
946 | imul eax,edx |
947 | imul eax,edx |
947 | add eax,[DATA_START] |
948 | add eax,[DATA_START] |
948 | mov ebx,buffer |
949 | mov ebx,buffer |
949 | add eax,edx ; start from last sector |
950 | add eax,edx ; start from last sector |
950 | 951 | ||
951 | dir_set_empty_directory: |
952 | dir_set_empty_directory: |
952 | dec eax ; next sector |
953 | dec eax ; next sector |
953 | cmp edx,1 ; is first directory sector? |
954 | cmp edx,1 ; is first directory sector? |
954 | jnz not_first_sector ; no. write empty sector |
955 | jnz not_first_sector ; no. write empty sector |
955 | mov esi,NewDirEntry1 |
956 | mov esi,NewDirEntry1 |
956 | mov edi,buffer |
957 | mov edi,buffer |
957 | mov ecx,64/4 |
958 | mov ecx,64/4 |
958 | cld |
959 | cld |
959 | rep movsd ; copy 2 first directory entrys "." and ".." |
960 | rep movsd ; copy 2 first directory entrys "." and ".." |
960 | 961 | ||
961 | not_first_sector: |
962 | not_first_sector: |
962 | call hd_write |
963 | call hd_write |
963 | cmp [hd_error],0 |
964 | cmp [hd_error],0 |
964 | jne make_dir_error_1 |
965 | jne make_dir_error_1 |
965 | 966 | ||
966 | dec edx |
967 | dec edx |
967 | jnz dir_set_empty_directory |
968 | jnz dir_set_empty_directory |
968 | 969 | ||
969 | mov ecx,-1 ; remove 1 cluster from free disk space |
970 | mov ecx,-1 ; remove 1 cluster from free disk space |
970 | call add_disk_free_space |
971 | call add_disk_free_space |
971 | cmp [hd_error],0 |
972 | cmp [hd_error],0 |
972 | jne make_dir_error_1 |
973 | jne make_dir_error_1 |
973 | 974 | ||
974 | popad |
975 | popad |
975 | call update_disk ; write all of cache and fat to hd |
976 | call update_disk ; write all of cache and fat to hd |
976 | cmp [hd_error],0 |
977 | cmp [hd_error],0 |
977 | jne make_dir_error_2 |
978 | jne make_dir_error_2 |
978 | mov [hd1_status],0 |
979 | mov [hd1_status],0 |
979 | xor eax,eax |
980 | xor eax,eax |
980 | ret |
981 | ret |
981 | 982 | ||
982 | 983 | ||
983 | removedir: |
984 | removedir: |
984 | ;----------------------------------------------------- |
985 | ;----------------------------------------------------- |
985 | ; input : eax = file/directory name |
986 | ; input : eax = file/directory name |
986 | ; edx = path |
987 | ; edx = path |
987 | ; output : eax = 0 - ok |
988 | ; output : eax = 0 - ok |
988 | ; 3 - unknown FS |
989 | ; 3 - unknown FS |
989 | ; 5 - file not found |
990 | ; 5 - file not found |
990 | ; 10 - access denied |
991 | ; 10 - access denied |
991 | ;----------------------------------------------------- |
992 | ;----------------------------------------------------- |
992 | cmp [fat_type],0 |
993 | cmp [fat_type],0 |
993 | jnz remove_dir_fat_ok |
994 | jnz remove_dir_fat_ok |
994 | mov eax,ERROR_UNKNOWN_FS |
995 | mov eax,ERROR_UNKNOWN_FS |
995 | ret |
996 | ret |
996 | 997 | ||
997 | remove_dir_fat_ok: |
998 | remove_dir_fat_ok: |
998 | ; call reserve_hd1 |
999 | ; call reserve_hd1 |
999 | 1000 | ||
1000 | push edi |
1001 | push edi |
1001 | mov edi,1 ; allow directory remove |
1002 | mov edi,1 ; allow directory remove |
1002 | call file_delete |
1003 | call file_delete |
1003 | cmp [hd_error],0 |
1004 | cmp [hd_error],0 |
1004 | jne @f |
1005 | jne @f |
1005 | 1006 | ||
1006 | pop edi |
1007 | pop edi |
1007 | 1008 | ||
1008 | call update_disk ; write all of cache and fat to hd |
1009 | call update_disk ; write all of cache and fat to hd |
1009 | @@: |
1010 | @@: |
1010 | mov [hd1_status],0 |
1011 | mov [hd1_status],0 |
1011 | ret |
1012 | ret |
1012 | 1013 | ||
1013 | 1014 | ||
1014 | add_disk_free_space: |
1015 | add_disk_free_space: |
1015 | ;----------------------------------------------------- |
1016 | ;----------------------------------------------------- |
1016 | ; input : ecx = cluster count |
1017 | ; input : ecx = cluster count |
1017 | ; Note : negative = remove clusters from free space |
1018 | ; Note : negative = remove clusters from free space |
1018 | ; positive = add clusters to free space |
1019 | ; positive = add clusters to free space |
1019 | ;----------------------------------------------------- |
1020 | ;----------------------------------------------------- |
1020 | test ecx,ecx ; no change |
1021 | test ecx,ecx ; no change |
1021 | je add_dfs_no |
1022 | je add_dfs_no |
1022 | cmp [fat_type],32 ; free disk space only used by fat32 |
1023 | cmp [fat_type],32 ; free disk space only used by fat32 |
1023 | jne add_dfs_no |
1024 | jne add_dfs_no |
1024 | 1025 | ||
1025 | push eax ebx |
1026 | push eax ebx |
1026 | mov eax,[ADR_FSINFO] |
1027 | mov eax,[ADR_FSINFO] |
1027 | mov ebx,buffer |
1028 | mov ebx,buffer |
1028 | call hd_read |
1029 | call hd_read |
1029 | cmp [hd_error],0 |
1030 | cmp [hd_error],0 |
1030 | jne add_not_fs |
1031 | jne add_not_fs |
1031 | 1032 | ||
1032 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
1033 | cmp dword [ebx+0x1fc],0xaa550000 ; check sector id |
1033 | jne add_not_fs |
1034 | jne add_not_fs |
1034 | 1035 | ||
1035 | add [ebx+0x1e8],ecx |
1036 | add [ebx+0x1e8],ecx |
1036 | call hd_write |
1037 | call hd_write |
1037 | cmp [hd_error],0 |
1038 | cmp [hd_error],0 |
1038 | jne add_not_fs |
1039 | jne add_not_fs |
1039 | 1040 | ||
1040 | add_not_fs: |
1041 | add_not_fs: |
1041 | pop ebx eax |
1042 | pop ebx eax |
1042 | 1043 | ||
1043 | add_dfs_no: |
1044 | add_dfs_no: |
1044 | ret |
1045 | ret |
1045 | 1046 | ||
1046 | 1047 | ||
1047 | file_append: |
1048 | file_append: |
1048 | ;----------------------------------------------------- |
1049 | ;----------------------------------------------------- |
1049 | ; input : eax = file name |
1050 | ; input : eax = file name |
1050 | ; edx = path |
1051 | ; edx = path |
1051 | ; ecx = pointer to buffer |
1052 | ; ecx = pointer to buffer |
1052 | ; ebx = bytes to write (0 = truncate file) |
1053 | ; ebx = bytes to write (0 = truncate file) |
1053 | ; esi = start position (-1 = end of file) |
1054 | ; esi = start position (-1 = end of file) |
1054 | ; output : eax = 0 - ok |
1055 | ; output : eax = 0 - ok |
1055 | ; 3 - unknown FS |
1056 | ; 3 - unknown FS |
1056 | ; 5 - file not found |
1057 | ; 5 - file not found |
1057 | ; 6 - end of file |
1058 | ; 6 - end of file |
1058 | ; 8 - disk full |
1059 | ; 8 - disk full |
1059 | ; 9 - fat table corrupted |
1060 | ; 9 - fat table corrupted |
1060 | ; 10 - access denied |
1061 | ; 10 - access denied |
1061 | ; ebx = bytes written |
1062 | ; ebx = bytes written |
1062 | ;----------------------------------------------------- |
1063 | ;----------------------------------------------------- |
1063 | cmp [fat_type],0 |
1064 | cmp [fat_type],0 |
1064 | jnz append_fat_ok |
1065 | jnz append_fat_ok |
1065 | mov eax,ERROR_UNKNOWN_FS |
1066 | mov eax,ERROR_UNKNOWN_FS |
1066 | ret |
1067 | ret |
1067 | 1068 | ||
1068 | append_fat_ok: |
1069 | append_fat_ok: |
1069 | ; call reserve_hd1 |
1070 | ; call reserve_hd1 |
1070 | 1071 | ||
1071 | pushad |
1072 | pushad |
1072 | 1073 | ||
1073 | mov ebx,edx |
1074 | mov ebx,edx |
1074 | call get_cluster_of_a_path |
1075 | call get_cluster_of_a_path |
1075 | jc append_not_found |
1076 | jc append_not_found |
1076 | 1077 | ||
1077 | mov ebx,PUSHAD_EAX ; file name |
1078 | mov ebx,PUSHAD_EAX ; file name |
1078 | call analyze_directory |
1079 | call analyze_directory |
1079 | jc append_not_found |
1080 | jc append_not_found |
1080 | 1081 | ||
1081 | mov [sector_tmp],eax |
1082 | mov [sector_tmp],eax |
1082 | mov [entry_pos],ebx |
1083 | mov [entry_pos],ebx |
1083 | 1084 | ||
1084 | test byte [ebx+11],0x10 ; is it directory? |
1085 | test byte [ebx+11],0x10 ; is it directory? |
1085 | jnz append_access ; yes |
1086 | jnz append_access ; yes |
1086 | 1087 | ||
1087 | mov ecx,[ebx+28] ; file size |
1088 | mov ecx,[ebx+28] ; file size |
1088 | mov edi,PUSHAD_ESI ; write position |
1089 | mov edi,PUSHAD_ESI ; write position |
1089 | cmp edi,-1 ; -1 = eof |
1090 | cmp edi,-1 ; -1 = eof |
1090 | jnz append_inside_file |
1091 | jnz append_inside_file |
1091 | mov edi,ecx ; file size |
1092 | mov edi,ecx ; file size |
1092 | 1093 | ||
1093 | append_inside_file: |
1094 | append_inside_file: |
1094 | cmp edi,ecx ; start above old file size? |
1095 | cmp edi,ecx ; start above old file size? |
1095 | ja append_eof ; yes |
1096 | ja append_eof ; yes |
1096 | 1097 | ||
1097 | mov [old_filesize],ecx |
1098 | mov [old_filesize],ecx |
1098 | mov [new_filepos],edi |
1099 | mov [new_filepos],edi |
1099 | 1100 | ||
1100 | mov ecx,PUSHAD_EBX ; bytes to write |
1101 | mov ecx,PUSHAD_EBX ; bytes to write |
1101 | test ecx,ecx ; truncate? |
1102 | test ecx,ecx ; truncate? |
1102 | jz append_truncate ; yes |
1103 | jz append_truncate ; yes |
1103 | 1104 | ||
1104 | mov [bytes2write],ecx ; bytes to write |
1105 | mov [bytes2write],ecx ; bytes to write |
1105 | mov esi,PUSHAD_ECX ; pointer to buffer |
1106 | mov esi,PUSHAD_ECX ; pointer to buffer |
1106 | mov eax,[ebx+20-2] ; FAT entry |
1107 | mov eax,[ebx+20-2] ; FAT entry |
1107 | mov ax,[ebx+26] |
1108 | mov ax,[ebx+26] |
1108 | and eax,[fatMASK] |
1109 | and eax,[fatMASK] |
1109 | jnz append_find_pos ; first cluster <> 0 |
1110 | jnz append_find_pos ; first cluster <> 0 |
1110 | 1111 | ||
1111 | mov eax,2 |
1112 | mov eax,2 |
1112 | call get_free_FAT |
1113 | call get_free_FAT |
1113 | jc append_disk_full |
1114 | jc append_disk_full |
1114 | mov ecx,eax ; set files first cluster |
1115 | mov ecx,eax ; set files first cluster |
1115 | mov [ebx+26],cx ; 16 bits low of cluster |
1116 | mov [ebx+26],cx ; 16 bits low of cluster |
1116 | shr ecx,16 |
1117 | shr ecx,16 |
1117 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
1118 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
1118 | mov edx,[fatEND] ; new end for cluster chain |
1119 | mov edx,[fatEND] ; new end for cluster chain |
1119 | call set_FAT |
1120 | call set_FAT |
1120 | cmp [hd_error],0 |
1121 | cmp [hd_error],0 |
1121 | jne append_access |
1122 | jne append_access |
1122 | 1123 | ||
1123 | push eax ; save first cluster |
1124 | push eax ; save first cluster |
1124 | mov eax,[sector_tmp] |
1125 | mov eax,[sector_tmp] |
1125 | mov ebx,buffer |
1126 | mov ebx,buffer |
1126 | call hd_write ; write new file entry back to disk |
1127 | call hd_write ; write new file entry back to disk |
1127 | cmp [hd_error],0 |
1128 | cmp [hd_error],0 |
1128 | jne append_access_1 |
1129 | jne append_access_1 |
1129 | 1130 | ||
1130 | pop eax |
1131 | pop eax |
1131 | 1132 | ||
1132 | append_remove_free: |
1133 | append_remove_free: |
1133 | mov ecx,-1 ; remove 1 cluster from free disk space |
1134 | mov ecx,-1 ; remove 1 cluster from free disk space |
1134 | call add_disk_free_space ; Note: uses buffer |
1135 | call add_disk_free_space ; Note: uses buffer |
1135 | cmp [hd_error],0 |
1136 | cmp [hd_error],0 |
1136 | jne append_access |
1137 | jne append_access |
1137 | 1138 | ||
1138 | append_found_cluster: |
1139 | append_found_cluster: |
1139 | mov [cluster],eax |
1140 | mov [cluster],eax |
1140 | sub eax,2 |
1141 | sub eax,2 |
1141 | mov ecx,[SECTORS_PER_CLUSTER] |
1142 | mov ecx,[SECTORS_PER_CLUSTER] |
1142 | imul eax,ecx |
1143 | imul eax,ecx |
1143 | add eax,[DATA_START] |
1144 | add eax,[DATA_START] |
1144 | xor edi,edi |
1145 | xor edi,edi |
1145 | 1146 | ||
1146 | append_new_sector: |
1147 | append_new_sector: |
1147 | cmp [hd_error],0 |
1148 | cmp [hd_error],0 |
1148 | jne append_access |
1149 | jne append_access |
1149 | push ecx |
1150 | push ecx |
1150 | mov ecx,[bytes2write] ; bytes left in buffer |
1151 | mov ecx,[bytes2write] ; bytes left in buffer |
1151 | mov ebx,512 |
1152 | mov ebx,512 |
1152 | sub ebx,edi ; bytes left in sector |
1153 | sub ebx,edi ; bytes left in sector |
1153 | cmp ecx,ebx |
1154 | cmp ecx,ebx |
1154 | jb append_bytes_ok |
1155 | jb append_bytes_ok |
1155 | mov ecx,ebx |
1156 | mov ecx,ebx |
1156 | 1157 | ||
1157 | append_bytes_ok: |
1158 | append_bytes_ok: |
1158 | cmp ecx,512 ; overwrite full sector? |
1159 | cmp ecx,512 ; overwrite full sector? |
1159 | jz append_full_sector ; yes |
1160 | jz append_full_sector ; yes |
1160 | mov ebx,buffer ; overwrite part of sector |
1161 | mov ebx,buffer ; overwrite part of sector |
1161 | call hd_read ; read old sector |
1162 | call hd_read ; read old sector |
1162 | cmp [hd_error],0 |
1163 | cmp [hd_error],0 |
1163 | jne append_access_1 |
1164 | jne append_access_1 |
1164 | 1165 | ||
1165 | append_full_sector: |
1166 | append_full_sector: |
1166 | sub [bytes2write],ecx |
1167 | sub [bytes2write],ecx |
1167 | add [new_filepos],ecx |
1168 | add [new_filepos],ecx |
1168 | add edi,buffer |
1169 | add edi,buffer |
1169 | cld |
1170 | cld |
1170 | rep movsb |
1171 | rep movsb |
1171 | pop ecx |
1172 | pop ecx |
1172 | 1173 | ||
1173 | mov ebx,buffer |
1174 | mov ebx,buffer |
1174 | call hd_write |
1175 | call hd_write |
1175 | cmp [hd_error],0 |
1176 | cmp [hd_error],0 |
1176 | jne append_access |
1177 | jne append_access |
1177 | 1178 | ||
1178 | cmp [bytes2write],0 ; is all done? |
1179 | cmp [bytes2write],0 ; is all done? |
1179 | jz append_done |
1180 | jz append_done |
1180 | xor edi,edi |
1181 | xor edi,edi |
1181 | inc eax |
1182 | inc eax |
1182 | dec ecx |
1183 | dec ecx |
1183 | jnz append_new_sector |
1184 | jnz append_new_sector |
1184 | 1185 | ||
1185 | mov eax,[cluster] |
1186 | mov eax,[cluster] |
1186 | call get_FAT |
1187 | call get_FAT |
1187 | cmp [hd_error],0 |
1188 | cmp [hd_error],0 |
1188 | jne append_access |
1189 | jne append_access |
1189 | 1190 | ||
1190 | cmp eax,2 |
1191 | cmp eax,2 |
1191 | jb append_fat |
1192 | jb append_fat |
1192 | cmp eax,[LAST_CLUSTER] |
1193 | cmp eax,[LAST_CLUSTER] |
1193 | jbe append_found_cluster |
1194 | jbe append_found_cluster |
1194 | 1195 | ||
1195 | append_alloc_cluster: |
1196 | append_alloc_cluster: |
1196 | mov eax,2 ; ToDo: use temp array to keep track |
1197 | mov eax,2 ; ToDo: use temp array to keep track |
1197 | call get_free_FAT ; of last free cluster |
1198 | call get_free_FAT ; of last free cluster |
1198 | jc append_disk_full |
1199 | jc append_disk_full |
1199 | push eax ; save new cluster |
1200 | push eax ; save new cluster |
1200 | mov edx,[fatEND] ; new end for cluster chain |
1201 | mov edx,[fatEND] ; new end for cluster chain |
1201 | call set_FAT |
1202 | call set_FAT |
1202 | cmp [hd_error],0 |
1203 | cmp [hd_error],0 |
1203 | jne append_access_1 |
1204 | jne append_access_1 |
1204 | 1205 | ||
1205 | mov edx,eax |
1206 | mov edx,eax |
1206 | mov eax,[cluster] |
1207 | mov eax,[cluster] |
1207 | mov [f_del],1 |
1208 | mov [f_del],1 |
1208 | call set_FAT ; update previous cluster |
1209 | call set_FAT ; update previous cluster |
1209 | cmp [hd_error],0 |
1210 | cmp [hd_error],0 |
1210 | jne append_access_1 |
1211 | jne append_access_1 |
1211 | 1212 | ||
1212 | mov [f_del],0 |
1213 | mov [f_del],0 |
1213 | pop eax |
1214 | pop eax |
1214 | jmp append_remove_free |
1215 | jmp append_remove_free |
1215 | 1216 | ||
1216 | append_find_pos: |
1217 | append_find_pos: |
1217 | call find_filepos |
1218 | call find_filepos |
1218 | mov [cluster],ebx |
1219 | mov [cluster],ebx |
1219 | jnc append_new_sector |
1220 | jnc append_new_sector |
1220 | test edi,edi |
1221 | test edi,edi |
1221 | jz append_alloc_cluster |
1222 | jz append_alloc_cluster |
1222 | 1223 | ||
1223 | append_fat: |
1224 | append_fat: |
1224 | mov eax,ERROR_FAT_TABLE |
1225 | mov eax,ERROR_FAT_TABLE |
1225 | jmp append_ret_code |
1226 | jmp append_ret_code |
1226 | 1227 | ||
1227 | append_disk_full: |
1228 | append_disk_full: |
1228 | cmp [hd_error],0 |
1229 | cmp [hd_error],0 |
1229 | jne append_access |
1230 | jne append_access |
1230 | mov eax,ERROR_DISK_FULL |
1231 | mov eax,ERROR_DISK_FULL |
1231 | jmp append_ret_code |
1232 | jmp append_ret_code |
1232 | 1233 | ||
1233 | append_done: |
1234 | append_done: |
1234 | xor eax,eax |
1235 | xor eax,eax |
1235 | 1236 | ||
1236 | append_ret_code: |
1237 | append_ret_code: |
1237 | mov PUSHAD_EAX,eax ; return code |
1238 | mov PUSHAD_EAX,eax ; return code |
1238 | 1239 | ||
1239 | mov eax,[sector_tmp] ; update directory entry |
1240 | mov eax,[sector_tmp] ; update directory entry |
1240 | mov ebx,buffer |
1241 | mov ebx,buffer |
1241 | call hd_read |
1242 | call hd_read |
1242 | cmp [hd_error],0 |
1243 | cmp [hd_error],0 |
1243 | jne append_access |
1244 | jne append_access |
1244 | 1245 | ||
1245 | mov ebx,[entry_pos] |
1246 | mov ebx,[entry_pos] |
1246 | mov ecx,[new_filepos] |
1247 | mov ecx,[new_filepos] |
1247 | cmp ecx,[old_filesize] ; is file pos above old size? |
1248 | cmp ecx,[old_filesize] ; is file pos above old size? |
1248 | jbe append_size_ok ; no |
1249 | jbe append_size_ok ; no |
1249 | mov [ebx+28],ecx ; new file size |
1250 | mov [ebx+28],ecx ; new file size |
1250 | 1251 | ||
1251 | append_size_ok: |
1252 | append_size_ok: |
1252 | call set_current_time_for_entry |
1253 | call set_current_time_for_entry |
1253 | mov ebx,buffer |
1254 | mov ebx,buffer |
1254 | call hd_write ; write new file entry back to disk |
1255 | call hd_write ; write new file entry back to disk |
1255 | cmp [hd_error],0 |
1256 | cmp [hd_error],0 |
1256 | jne append_access |
1257 | jne append_access |
1257 | 1258 | ||
1258 | sub ecx,PUSHAD_ESI ; start position |
1259 | sub ecx,PUSHAD_ESI ; start position |
1259 | mov PUSHAD_EBX,ecx ; bytes written |
1260 | mov PUSHAD_EBX,ecx ; bytes written |
1260 | popad |
1261 | popad |
1261 | call update_disk ; write all of cache and fat to hd |
1262 | call update_disk ; write all of cache and fat to hd |
1262 | cmp [hd_error],0 |
1263 | cmp [hd_error],0 |
1263 | jne append_access_2 |
1264 | jne append_access_2 |
1264 | 1265 | ||
1265 | mov [hd1_status],0 |
1266 | mov [hd1_status],0 |
1266 | ret |
1267 | ret |
1267 | 1268 | ||
1268 | append_eof: |
1269 | append_eof: |
1269 | popad |
1270 | popad |
1270 | mov [hd1_status],0 |
1271 | mov [hd1_status],0 |
1271 | xor ebx,ebx |
1272 | xor ebx,ebx |
1272 | mov eax,ERROR_END_OF_FILE |
1273 | mov eax,ERROR_END_OF_FILE |
1273 | ret |
1274 | ret |
1274 | 1275 | ||
1275 | append_not_found: |
1276 | append_not_found: |
1276 | cmp [hd_error],0 |
1277 | cmp [hd_error],0 |
1277 | jne append_access |
1278 | jne append_access |
1278 | popad |
1279 | popad |
1279 | mov [hd1_status],0 |
1280 | mov [hd1_status],0 |
1280 | xor ebx,ebx |
1281 | xor ebx,ebx |
1281 | mov eax,ERROR_FILE_NOT_FOUND |
1282 | mov eax,ERROR_FILE_NOT_FOUND |
1282 | ret |
1283 | ret |
1283 | append_access_1: |
1284 | append_access_1: |
1284 | add esp,4 |
1285 | add esp,4 |
1285 | append_access: |
1286 | append_access: |
1286 | popad |
1287 | popad |
1287 | append_access_2: |
1288 | append_access_2: |
1288 | mov [hd1_status],0 |
1289 | mov [hd1_status],0 |
1289 | xor ebx,ebx |
1290 | xor ebx,ebx |
1290 | mov eax,ERROR_ACCESS_DENIED |
1291 | mov eax,ERROR_ACCESS_DENIED |
1291 | ret |
1292 | ret |
1292 | 1293 | ||
1293 | append_truncate: |
1294 | append_truncate: |
1294 | mov edx,[ebx+20-2] ; FAT entry |
1295 | mov edx,[ebx+20-2] ; FAT entry |
1295 | mov dx,[ebx+26] |
1296 | mov dx,[ebx+26] |
1296 | and edx,[fatMASK] |
1297 | and edx,[fatMASK] |
1297 | mov [ebx+28],edi ; set new file size |
1298 | mov [ebx+28],edi ; set new file size |
1298 | test edi,edi ; 0 length file? |
1299 | test edi,edi ; 0 length file? |
1299 | jnz truncate_save_size ; no |
1300 | jnz truncate_save_size ; no |
1300 | mov [ebx+20],di ; FAT entry = 0 |
1301 | mov [ebx+20],di ; FAT entry = 0 |
1301 | mov [ebx+26],di |
1302 | mov [ebx+26],di |
1302 | 1303 | ||
1303 | truncate_save_size: |
1304 | truncate_save_size: |
1304 | call set_current_time_for_entry |
1305 | call set_current_time_for_entry |
1305 | mov ebx,buffer |
1306 | mov ebx,buffer |
1306 | call hd_write |
1307 | call hd_write |
1307 | cmp [hd_error],0 |
1308 | cmp [hd_error],0 |
1308 | jne append_access |
1309 | jne append_access |
1309 | 1310 | ||
1310 | mov eax,edx ; first cluster |
1311 | mov eax,edx ; first cluster |
1311 | test edi,edi ; 0 length file? |
1312 | test edi,edi ; 0 length file? |
1312 | jz truncate_clear_chain |
1313 | jz truncate_clear_chain |
1313 | 1314 | ||
1314 | imul esi,[SECTORS_PER_CLUSTER],512 ; esi = cluster size in bytes |
1315 | imul esi,[SECTORS_PER_CLUSTER],512 ; esi = cluster size in bytes |
1315 | 1316 | ||
1316 | truncate_new_cluster: |
1317 | truncate_new_cluster: |
1317 | cmp eax,2 ; incorrect fat chain? |
1318 | cmp eax,2 ; incorrect fat chain? |
1318 | jb truncate_eof ; yes |
1319 | jb truncate_eof ; yes |
1319 | cmp eax,[fatRESERVED] ; is it end of file? |
1320 | cmp eax,[fatRESERVED] ; is it end of file? |
1320 | jnb truncate_eof ; yes |
1321 | jnb truncate_eof ; yes |
1321 | sub edi,esi |
1322 | sub edi,esi |
1322 | jbe truncate_pos_found |
1323 | jbe truncate_pos_found |
1323 | call get_FAT ; get next cluster |
1324 | call get_FAT ; get next cluster |
1324 | cmp [hd_error],0 |
1325 | cmp [hd_error],0 |
1325 | jne append_access |
1326 | jne append_access |
1326 | 1327 | ||
1327 | jmp truncate_new_cluster |
1328 | jmp truncate_new_cluster |
1328 | 1329 | ||
1329 | truncate_pos_found: |
1330 | truncate_pos_found: |
1330 | mov edx,[fatEND] ; new end for cluster chain |
1331 | mov edx,[fatEND] ; new end for cluster chain |
1331 | mov [f_del],1 |
1332 | mov [f_del],1 |
1332 | call set_FAT |
1333 | call set_FAT |
1333 | cmp [hd_error],0 |
1334 | cmp [hd_error],0 |
1334 | jne append_access |
1335 | jne append_access |
1335 | 1336 | ||
1336 | mov [f_del],0 |
1337 | mov [f_del],0 |
1337 | mov eax,edx ; clear rest of chain |
1338 | mov eax,edx ; clear rest of chain |
1338 | 1339 | ||
1339 | truncate_clear_chain: |
1340 | truncate_clear_chain: |
1340 | call clear_cluster_chain |
1341 | call clear_cluster_chain |
1341 | cmp [hd_error],0 |
1342 | cmp [hd_error],0 |
1342 | jne append_access |
1343 | jne append_access |
1343 | 1344 | ||
1344 | truncate_eof: |
1345 | truncate_eof: |
1345 | popad |
1346 | popad |
1346 | call update_disk ; write all of cache and fat to hd |
1347 | call update_disk ; write all of cache and fat to hd |
1347 | cmp [hd_error],0 |
1348 | cmp [hd_error],0 |
1348 | jne append_access_2 |
1349 | jne append_access_2 |
1349 | 1350 | ||
1350 | mov [hd1_status],0 |
1351 | mov [hd1_status],0 |
1351 | xor ebx,ebx |
1352 | xor ebx,ebx |
1352 | xor eax,eax |
1353 | xor eax,eax |
1353 | ret |
1354 | ret |
1354 | 1355 | ||
1355 | 1356 | ||
1356 | find_filepos: |
1357 | find_filepos: |
1357 | ;----------------------------------------------------- |
1358 | ;----------------------------------------------------- |
1358 | ; input : eax = first cluster |
1359 | ; input : eax = first cluster |
1359 | ; edi = bytes to skip over (start position) |
1360 | ; edi = bytes to skip over (start position) |
1360 | ; output : if CARRY=0 file position found |
1361 | ; output : if CARRY=0 file position found |
1361 | ; if CARRY=1 end of file found |
1362 | ; if CARRY=1 end of file found |
1362 | ; eax = current file sector |
1363 | ; eax = current file sector |
1363 | ; ebx = last cluster |
1364 | ; ebx = last cluster |
1364 | ; ecx = sector count in last cluster |
1365 | ; ecx = sector count in last cluster |
1365 | ; edi = bytes to skip over (sector position) |
1366 | ; edi = bytes to skip over (sector position) |
1366 | ;----------------------------------------------------- |
1367 | ;----------------------------------------------------- |
1367 | push esi |
1368 | push esi |
1368 | mov ecx,[SECTORS_PER_CLUSTER] |
1369 | mov ecx,[SECTORS_PER_CLUSTER] |
1369 | imul esi,ecx,512 ; esi = cluster size in bytes |
1370 | imul esi,ecx,512 ; esi = cluster size in bytes |
1370 | mov ebx,eax |
1371 | mov ebx,eax |
1371 | 1372 | ||
1372 | filepos_new_cluster: |
1373 | filepos_new_cluster: |
1373 | cmp eax,2 ; incorrect fat chain? |
1374 | cmp eax,2 ; incorrect fat chain? |
1374 | jb filepos_eof ; yes |
1375 | jb filepos_eof ; yes |
1375 | cmp eax,[fatRESERVED] ; is it end of file? |
1376 | cmp eax,[fatRESERVED] ; is it end of file? |
1376 | jnb filepos_eof ; yes |
1377 | jnb filepos_eof ; yes |
1377 | 1378 | ||
1378 | mov ebx,eax |
1379 | mov ebx,eax |
1379 | cmp edi,esi ; skip over full cluster? |
1380 | cmp edi,esi ; skip over full cluster? |
1380 | jb filepos_cluster_ok ; no |
1381 | jb filepos_cluster_ok ; no |
1381 | 1382 | ||
1382 | sub edi,esi |
1383 | sub edi,esi |
1383 | call get_FAT ; get next cluster |
1384 | call get_FAT ; get next cluster |
1384 | cmp [hd_error],0 |
1385 | cmp [hd_error],0 |
1385 | jne filepos_eof |
1386 | jne filepos_eof |
1386 | 1387 | ||
1387 | jmp filepos_new_cluster |
1388 | jmp filepos_new_cluster |
1388 | 1389 | ||
1389 | filepos_cluster_ok: |
1390 | filepos_cluster_ok: |
1390 | sub eax,2 |
1391 | sub eax,2 |
1391 | imul eax,ecx |
1392 | imul eax,ecx |
1392 | add eax,[DATA_START] |
1393 | add eax,[DATA_START] |
1393 | 1394 | ||
1394 | filepos_new_sector: |
1395 | filepos_new_sector: |
1395 | cmp edi,512 ; skip over full sector? |
1396 | cmp edi,512 ; skip over full sector? |
1396 | jb filepos_sector_ok ; no |
1397 | jb filepos_sector_ok ; no |
1397 | sub edi,512 |
1398 | sub edi,512 |
1398 | inc eax |
1399 | inc eax |
1399 | dec ecx |
1400 | dec ecx |
1400 | jnz filepos_new_sector |
1401 | jnz filepos_new_sector |
1401 | 1402 | ||
1402 | filepos_eof: |
1403 | filepos_eof: |
1403 | pop esi |
1404 | pop esi |
1404 | stc |
1405 | stc |
1405 | ret |
1406 | ret |
1406 | 1407 | ||
1407 | filepos_sector_ok: |
1408 | filepos_sector_ok: |
1408 | pop esi |
1409 | pop esi |
1409 | clc |
1410 | clc |
1410 | ret |
1411 | ret |
1411 | 1412 | ||
1412 | 1413 | ||
1413 | file_write: |
1414 | file_write: |
1414 | ;-------------------------------------------------------------------------- |
1415 | ;-------------------------------------------------------------------------- |
1415 | ; INPUT : user-reg register-in-this meaning symbol-in-this-routine |
1416 | ; INPUT : user-reg register-in-this meaning symbol-in-this-routine |
1416 | ; |
1417 | ; |
1417 | ; EAX EDI system call to write / |
1418 | ; EAX EDI system call to write / |
1418 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
1419 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
1419 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
1420 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
1420 | ; ECX EBX (PAR2) file size PAR2 |
1421 | ; ECX EBX (PAR2) file size PAR2 |
1421 | ; ESI EDX (PAR3) pointer to path PAR3 |
1422 | ; ESI EDX (PAR3) pointer to path PAR3 |
1422 | ; |
1423 | ; |
1423 | ; output : eax = 0 - ok |
1424 | ; output : eax = 0 - ok |
1424 | ; 3 - unknown FS |
1425 | ; 3 - unknown FS |
1425 | ; 5 - file not found |
1426 | ; 5 - file not found |
1426 | ; 8 - disk full |
1427 | ; 8 - disk full |
1427 | ; 10 - access denied |
1428 | ; 10 - access denied |
1428 | ;-------------------------------------------------------------------------- |
1429 | ;-------------------------------------------------------------------------- |
1429 | cmp [fat_type],0 |
1430 | cmp [fat_type],0 |
1430 | jnz fat_ok_for_writing |
1431 | jnz fat_ok_for_writing |
1431 | mov eax,ERROR_UNKNOWN_FS |
1432 | mov eax,ERROR_UNKNOWN_FS |
1432 | ret |
1433 | ret |
1433 | 1434 | ||
1434 | fat_ok_for_writing: |
1435 | fat_ok_for_writing: |
1435 | ; call reserve_hd1 |
1436 | ; call reserve_hd1 |
1436 | 1437 | ||
1437 | pushad |
1438 | pushad |
1438 | 1439 | ||
1439 | xor edi,edi ; don't allow directory remove |
1440 | xor edi,edi ; don't allow directory remove |
1440 | call file_delete ; try to delete the file first |
1441 | call file_delete ; try to delete the file first |
1441 | cmp [hd_error],0 |
1442 | cmp [hd_error],0 |
1442 | jne exit_write_access_1 |
1443 | jne exit_write_access_1 |
1443 | 1444 | ||
1444 | test eax,eax |
1445 | test eax,eax |
1445 | jz old_deleted ; deleted ok |
1446 | jz old_deleted ; deleted ok |
1446 | cmp eax,ERROR_FILE_NOT_FOUND |
1447 | cmp eax,ERROR_FILE_NOT_FOUND |
1447 | jnz exit_write_access ; it exist but can't delete |
1448 | jnz exit_write_access ; it exist but can't delete |
1448 | 1449 | ||
1449 | old_deleted: |
1450 | old_deleted: |
1450 | mov ebx,PUSHAD_EDX |
1451 | mov ebx,PUSHAD_EDX |
1451 | call get_cluster_of_a_path |
1452 | call get_cluster_of_a_path |
1452 | jnc found_directory_for_writing |
1453 | jnc found_directory_for_writing |
1453 | cmp [hd_error],0 |
1454 | cmp [hd_error],0 |
1454 | jne exit_write_access |
1455 | jne exit_write_access |
1455 | 1456 | ||
1456 | exit_writing_with_error: |
1457 | exit_writing_with_error: |
1457 | popad |
1458 | popad |
1458 | call update_disk ; write all of cache and fat to hd |
1459 | call update_disk ; write all of cache and fat to hd |
1459 | cmp [hd_error],0 |
1460 | cmp [hd_error],0 |
1460 | jne exit_write_access_2 |
1461 | jne exit_write_access_2 |
1461 | 1462 | ||
1462 | mov [hd1_status],0 |
1463 | mov [hd1_status],0 |
1463 | mov eax,ERROR_FILE_NOT_FOUND |
1464 | mov eax,ERROR_FILE_NOT_FOUND |
1464 | ret |
1465 | ret |
1465 | 1466 | ||
1466 | exit_writing_disk_full_clear: |
1467 | exit_writing_disk_full_clear: |
1467 | cmp [hd_error],0 |
1468 | cmp [hd_error],0 |
1468 | jne exit_write_access_1 |
1469 | jne exit_write_access_1 |
1469 | mov eax,[sector_tmp] |
1470 | mov eax,[sector_tmp] |
1470 | mov ebx,buffer |
1471 | mov ebx,buffer |
1471 | call hd_read ; read directory sector |
1472 | call hd_read ; read directory sector |
1472 | cmp [hd_error],0 |
1473 | cmp [hd_error],0 |
1473 | jne exit_write_access_1 |
1474 | jne exit_write_access_1 |
1474 | 1475 | ||
1475 | mov edx,[entry_pos] |
1476 | mov edx,[entry_pos] |
1476 | mov byte [edx],0xe5 ; mark as deleted |
1477 | mov byte [edx],0xe5 ; mark as deleted |
1477 | call hd_write |
1478 | call hd_write |
1478 | cmp [hd_error],0 |
1479 | cmp [hd_error],0 |
1479 | jne exit_write_access_1 |
1480 | jne exit_write_access_1 |
1480 | 1481 | ||
1481 | mov eax,[edx+20-2] ; FAT entry |
1482 | mov eax,[edx+20-2] ; FAT entry |
1482 | mov ax,[edx+26] |
1483 | mov ax,[edx+26] |
1483 | and eax,[fatMASK] |
1484 | and eax,[fatMASK] |
1484 | call clear_cluster_chain |
1485 | call clear_cluster_chain |
1485 | 1486 | ||
1486 | exit_writing_disk_full: |
1487 | exit_writing_disk_full: |
1487 | cmp [hd_error],0 |
1488 | cmp [hd_error],0 |
1488 | jne exit_write_access_1 |
1489 | jne exit_write_access_1 |
1489 | popad |
1490 | popad |
1490 | call update_disk ; write all of cache and fat to hd |
1491 | call update_disk ; write all of cache and fat to hd |
1491 | cmp [hd_error],0 |
1492 | cmp [hd_error],0 |
1492 | jne exit_write_access_2 |
1493 | jne exit_write_access_2 |
1493 | mov [hd1_status],0 |
1494 | mov [hd1_status],0 |
1494 | mov eax,ERROR_DISK_FULL |
1495 | mov eax,ERROR_DISK_FULL |
1495 | ret |
1496 | ret |
1496 | 1497 | ||
1497 | exit_write_access: |
1498 | exit_write_access: |
1498 | popad |
1499 | popad |
1499 | call update_disk ; write all of cache and fat to hd |
1500 | call update_disk ; write all of cache and fat to hd |
1500 | mov [hd1_status],0 |
1501 | mov [hd1_status],0 |
1501 | mov eax,ERROR_ACCESS_DENIED |
1502 | mov eax,ERROR_ACCESS_DENIED |
1502 | ret |
1503 | ret |
1503 | 1504 | ||
1504 | exit_write_access_1: |
1505 | exit_write_access_1: |
1505 | popad |
1506 | popad |
1506 | exit_write_access_2: |
1507 | exit_write_access_2: |
1507 | mov [hd1_status],0 |
1508 | mov [hd1_status],0 |
1508 | mov eax,ERROR_ACCESS_DENIED |
1509 | mov eax,ERROR_ACCESS_DENIED |
1509 | ret |
1510 | ret |
1510 | 1511 | ||
1511 | found_directory_for_writing: |
1512 | found_directory_for_writing: |
1512 | call analyze_directory_to_write |
1513 | call analyze_directory_to_write |
1513 | jc exit_writing_disk_full |
1514 | jc exit_writing_disk_full |
1514 | 1515 | ||
1515 | mov [sector_tmp],eax |
1516 | mov [sector_tmp],eax |
1516 | mov [entry_pos],ebx |
1517 | mov [entry_pos],ebx |
1517 | push eax ; save directory sector |
1518 | push eax ; save directory sector |
1518 | mov eax,2 |
1519 | mov eax,2 |
1519 | call get_free_FAT |
1520 | call get_free_FAT |
1520 | mov [cluster],eax ; first free cluster |
1521 | mov [cluster],eax ; first free cluster |
1521 | pop eax |
1522 | pop eax |
1522 | jc exit_writing_disk_full |
1523 | jc exit_writing_disk_full |
1523 | 1524 | ||
1524 | mov esi,PUSHAD_EAX ; file name |
1525 | mov esi,PUSHAD_EAX ; file name |
1525 | mov edi,ebx ; pointer in buffer |
1526 | mov edi,ebx ; pointer in buffer |
1526 | mov ecx,11 |
1527 | mov ecx,11 |
1527 | cld |
1528 | cld |
1528 | rep movsb |
1529 | rep movsb |
1529 | 1530 | ||
1530 | mov esi,PUSHAD_EBX ; file size (bytes left) |
1531 | mov esi,PUSHAD_EBX ; file size (bytes left) |
1531 | mov [ebx+28],esi ; file size |
1532 | mov [ebx+28],esi ; file size |
1532 | mov ecx,[cluster] |
1533 | mov ecx,[cluster] |
1533 | mov [ebx+26],cx ; 16 bits low of cluster |
1534 | mov [ebx+26],cx ; 16 bits low of cluster |
1534 | shr ecx,16 |
1535 | shr ecx,16 |
1535 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
1536 | mov [ebx+20],cx ; 16 bits high of cluster (=0 fat16) |
1536 | mov byte [ebx+11],0x20 ; attribute = archive |
1537 | mov byte [ebx+11],0x20 ; attribute = archive |
1537 | 1538 | ||
1538 | call set_current_time_for_entry |
1539 | call set_current_time_for_entry |
1539 | 1540 | ||
1540 | mov ebx,buffer ; save the directory name,length,cluster |
1541 | mov ebx,buffer ; save the directory name,length,cluster |
1541 | call hd_write |
1542 | call hd_write |
1542 | cmp [hd_error],0 |
1543 | cmp [hd_error],0 |
1543 | jne exit_write_access_1 |
1544 | jne exit_write_access_1 |
1544 | 1545 | ||
1545 | imul edi,[SECTORS_PER_CLUSTER],512 ; edi = cluster size in bytes |
1546 | imul edi,[SECTORS_PER_CLUSTER],512 ; edi = cluster size in bytes |
1546 | xor ecx,ecx ; cluster count |
1547 | xor ecx,ecx ; cluster count |
1547 | mov ebx,PUSHAD_ECX ; ebx = buffer |
1548 | mov ebx,PUSHAD_ECX ; ebx = buffer |
1548 | 1549 | ||
1549 | hd_new_block_write: |
1550 | hd_new_block_write: |
1550 | 1551 | ||
1551 | mov eax,[cluster] ; eax = block |
1552 | mov eax,[cluster] ; eax = block |
1552 | call set_data_cluster |
1553 | call set_data_cluster |
1553 | cmp [hd_error],0 |
1554 | cmp [hd_error],0 |
1554 | jne exit_write_access_1 |
1555 | jne exit_write_access_1 |
1555 | 1556 | ||
1556 | sub esi,edi ; sub wrote bytes |
1557 | sub esi,edi ; sub wrote bytes |
1557 | jbe file_saved_OK ; end if all done |
1558 | jbe file_saved_OK ; end if all done |
1558 | add ebx,edi ; update buffer position |
1559 | add ebx,edi ; update buffer position |
1559 | 1560 | ||
1560 | inc eax |
1561 | inc eax |
1561 | call get_free_FAT ; next free in FAT |
1562 | call get_free_FAT ; next free in FAT |
1562 | jc exit_writing_disk_full_clear |
1563 | jc exit_writing_disk_full_clear |
1563 | 1564 | ||
1564 | mov edx,eax |
1565 | mov edx,eax |
1565 | xchg eax,[cluster] ; get old cluster and save new cluster |
1566 | xchg eax,[cluster] ; get old cluster and save new cluster |
1566 | call set_FAT ; add it in cluster chain |
1567 | call set_FAT ; add it in cluster chain |
1567 | cmp [hd_error],0 |
1568 | cmp [hd_error],0 |
1568 | jne exit_write_access_1 |
1569 | jne exit_write_access_1 |
1569 | 1570 | ||
1570 | dec ecx ; update cluster count |
1571 | dec ecx ; update cluster count |
1571 | jmp hd_new_block_write |
1572 | jmp hd_new_block_write |
1572 | 1573 | ||
1573 | file_saved_OK: |
1574 | file_saved_OK: |
1574 | 1575 | ||
1575 | mov edx,[fatEND] ; new end for cluster chain |
1576 | mov edx,[fatEND] ; new end for cluster chain |
1576 | call set_FAT |
1577 | call set_FAT |
1577 | cmp [hd_error],0 |
1578 | cmp [hd_error],0 |
1578 | jne exit_write_access_1 |
1579 | jne exit_write_access_1 |
1579 | 1580 | ||
1580 | dec ecx ; update cluster count |
1581 | dec ecx ; update cluster count |
1581 | 1582 | ||
1582 | call add_disk_free_space ; remove clusters from free disk space |
1583 | call add_disk_free_space ; remove clusters from free disk space |
1583 | cmp [hd_error],0 |
1584 | cmp [hd_error],0 |
1584 | jne exit_write_access_1 |
1585 | jne exit_write_access_1 |
1585 | 1586 | ||
1586 | popad |
1587 | popad |
1587 | call update_disk ; write all of cache and fat to hd |
1588 | call update_disk ; write all of cache and fat to hd |
1588 | cmp [hd_error],0 |
1589 | cmp [hd_error],0 |
1589 | jne exit_write_access_2 |
1590 | jne exit_write_access_2 |
1590 | mov [hd1_status],0 |
1591 | mov [hd1_status],0 |
1591 | xor eax,eax |
1592 | xor eax,eax |
1592 | ret |
1593 | ret |
1593 | 1594 | ||
1594 | 1595 | ||
1595 | file_read: |
1596 | file_read: |
1596 | ;-------------------------------------------------------------------------- |
1597 | ;-------------------------------------------------------------------------- |
1597 | ; INPUT : user-register register-in-this meaning symbol-in-this |
1598 | ; INPUT : user-register register-in-this meaning symbol-in-this |
1598 | ; |
1599 | ; |
1599 | ; EAX EDI system call to write / |
1600 | ; EAX EDI system call to write / |
1600 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
1601 | ; EBX EAX (PAR0) pointer to file-name PAR0 |
1601 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
1602 | ; EDX ECX (PAR1) pointer to buffer PAR1 |
1602 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
1603 | ; ECX EBX (PAR2) vt file blocks to read PAR2 |
1603 | ; ESI EDX (PAR3) pointer to path PAR3 |
1604 | ; ESI EDX (PAR3) pointer to path PAR3 |
1604 | ; EDI ESI vt first 512 block to read |
1605 | ; EDI ESI vt first 512 block to read |
1605 | ; EDI if 0 - read root |
1606 | ; EDI if 0 - read root |
1606 | ; |
1607 | ; |
1607 | ; output : eax = 0 - ok |
1608 | ; output : eax = 0 - ok |
1608 | ; 3 - unknown FS |
1609 | ; 3 - unknown FS |
1609 | ; 5 - file not found |
1610 | ; 5 - file not found |
1610 | ; 6 - end of file |
1611 | ; 6 - end of file |
1611 | ; 9 - fat table corrupted |
1612 | ; 9 - fat table corrupted |
1612 | ; 10 - access denied |
1613 | ; 10 - access denied |
1613 | ; ebx = size of file/directory |
1614 | ; ebx = size of file/directory |
1614 | ;-------------------------------------------------------------------------- |
1615 | ;-------------------------------------------------------------------------- |
1615 | cmp [fat_type],0 |
1616 | cmp [fat_type],0 |
1616 | jnz fat_ok_for_reading |
1617 | jnz fat_ok_for_reading |
1617 | xor ebx,ebx |
1618 | xor ebx,ebx |
1618 | mov eax,ERROR_UNKNOWN_FS |
1619 | mov eax,ERROR_UNKNOWN_FS |
1619 | mov [hd1_status], ebx |
1620 | mov [hd1_status], ebx |
1620 | ret |
1621 | ret |
1621 | 1622 | ||
1622 | fat_ok_for_reading: |
1623 | fat_ok_for_reading: |
1623 | ; call reserve_hd1 |
1624 | ; call reserve_hd1 |
1624 | 1625 | ||
1625 | pushad |
1626 | pushad |
1626 | 1627 | ||
1627 | mov ebx,edx |
1628 | mov ebx,edx |
1628 | call get_cluster_of_a_path |
1629 | call get_cluster_of_a_path |
1629 | jc file_to_read_not_found |
1630 | jc file_to_read_not_found |
1630 | 1631 | ||
1631 | test edi,edi ; read rootdir |
1632 | test edi,edi ; read rootdir |
1632 | jne no_read_root |
1633 | jne no_read_root |
1633 | 1634 | ||
1634 | xor eax,eax |
1635 | xor eax,eax |
1635 | call get_dir_size ; return rootdir size |
1636 | call get_dir_size ; return rootdir size |
1636 | cmp [hd_error],0 |
1637 | cmp [hd_error],0 |
1637 | jne file_access_denied |
1638 | jne file_access_denied |
1638 | 1639 | ||
1639 | mov [file_size],eax |
1640 | mov [file_size],eax |
1640 | mov eax,[ROOT_CLUSTER] |
1641 | mov eax,[ROOT_CLUSTER] |
1641 | jmp file_read_start |
1642 | jmp file_read_start |
1642 | 1643 | ||
1643 | no_read_root: |
1644 | no_read_root: |
1644 | mov ebx,PUSHAD_EAX ; file name |
1645 | mov ebx,PUSHAD_EAX ; file name |
1645 | call analyze_directory |
1646 | call analyze_directory |
1646 | jc file_to_read_not_found |
1647 | jc file_to_read_not_found |
1647 | 1648 | ||
1648 | mov eax,[ebx+28] ; file size |
1649 | mov eax,[ebx+28] ; file size |
1649 | test byte [ebx+11],0x10 ; is it directory? |
1650 | test byte [ebx+11],0x10 ; is it directory? |
1650 | jz read_set_size ; no |
1651 | jz read_set_size ; no |
1651 | 1652 | ||
1652 | mov eax,[ebx+20-2] ; FAT entry |
1653 | mov eax,[ebx+20-2] ; FAT entry |
1653 | mov ax,[ebx+26] |
1654 | mov ax,[ebx+26] |
1654 | and eax,[fatMASK] |
1655 | and eax,[fatMASK] |
1655 | call get_dir_size |
1656 | call get_dir_size |
1656 | cmp [hd_error],0 |
1657 | cmp [hd_error],0 |
1657 | jne file_access_denied |
1658 | jne file_access_denied |
1658 | 1659 | ||
1659 | read_set_size: |
1660 | read_set_size: |
1660 | mov [file_size],eax |
1661 | mov [file_size],eax |
1661 | 1662 | ||
1662 | mov eax,[ebx+20-2] ; FAT entry |
1663 | mov eax,[ebx+20-2] ; FAT entry |
1663 | mov ax,[ebx+26] |
1664 | mov ax,[ebx+26] |
1664 | and eax,[fatMASK] |
1665 | and eax,[fatMASK] |
1665 | 1666 | ||
1666 | file_read_start: |
1667 | file_read_start: |
1667 | mov ebx,PUSHAD_ECX ; pointer to buffer |
1668 | mov ebx,PUSHAD_ECX ; pointer to buffer |
1668 | mov edx,PUSHAD_EBX ; file blocks to read |
1669 | mov edx,PUSHAD_EBX ; file blocks to read |
1669 | mov esi,PUSHAD_ESI ; first 512 block to read |
1670 | mov esi,PUSHAD_ESI ; first 512 block to read |
1670 | 1671 | ||
1671 | file_read_new_cluster: |
1672 | file_read_new_cluster: |
1672 | call get_data_cluster |
1673 | call get_data_cluster |
1673 | jc file_read_eof ; end of file or cluster out of range |
1674 | jc file_read_eof ; end of file or cluster out of range |
1674 | 1675 | ||
1675 | test edx,edx ; is all read? |
1676 | test edx,edx ; is all read? |
1676 | je file_read_OK ; yes |
1677 | je file_read_OK ; yes |
1677 | 1678 | ||
1678 | call get_FAT ; get next cluster |
1679 | call get_FAT ; get next cluster |
1679 | cmp [hd_error],0 |
1680 | cmp [hd_error],0 |
1680 | jne file_access_denied |
1681 | jne file_access_denied |
1681 | 1682 | ||
1682 | cmp eax,[fatRESERVED] ; end of file |
1683 | cmp eax,[fatRESERVED] ; end of file |
1683 | jnb file_read_eof |
1684 | jnb file_read_eof |
1684 | cmp eax,2 ; incorrect fat chain |
1685 | cmp eax,2 ; incorrect fat chain |
1685 | jnb file_read_new_cluster |
1686 | jnb file_read_new_cluster |
1686 | 1687 | ||
1687 | popad |
1688 | popad |
1688 | mov [hd1_status],0 |
1689 | mov [hd1_status],0 |
1689 | mov ebx,[file_size] |
1690 | mov ebx,[file_size] |
1690 | mov eax,ERROR_FAT_TABLE |
1691 | mov eax,ERROR_FAT_TABLE |
1691 | ret |
1692 | ret |
1692 | 1693 | ||
1693 | file_read_eof: |
1694 | file_read_eof: |
1694 | cmp [hd_error],0 |
1695 | cmp [hd_error],0 |
1695 | jne file_access_denied |
1696 | jne file_access_denied |
1696 | popad |
1697 | popad |
1697 | mov [hd1_status],0 |
1698 | mov [hd1_status],0 |
1698 | mov ebx,[file_size] |
1699 | mov ebx,[file_size] |
1699 | mov eax,ERROR_END_OF_FILE |
1700 | mov eax,ERROR_END_OF_FILE |
1700 | ret |
1701 | ret |
1701 | 1702 | ||
1702 | file_read_OK: |
1703 | file_read_OK: |
1703 | popad |
1704 | popad |
1704 | mov [hd1_status],0 |
1705 | mov [hd1_status],0 |
1705 | mov ebx,[file_size] |
1706 | mov ebx,[file_size] |
1706 | xor eax,eax |
1707 | xor eax,eax |
1707 | ret |
1708 | ret |
1708 | 1709 | ||
1709 | file_to_read_not_found: |
1710 | file_to_read_not_found: |
1710 | cmp [hd_error],0 |
1711 | cmp [hd_error],0 |
1711 | jne file_access_denied |
1712 | jne file_access_denied |
1712 | popad |
1713 | popad |
1713 | mov [hd1_status],0 |
1714 | mov [hd1_status],0 |
1714 | xor ebx,ebx |
1715 | xor ebx,ebx |
1715 | mov eax,ERROR_FILE_NOT_FOUND |
1716 | mov eax,ERROR_FILE_NOT_FOUND |
1716 | ret |
1717 | ret |
1717 | 1718 | ||
1718 | file_access_denied: |
1719 | file_access_denied: |
1719 | popad |
1720 | popad |
1720 | mov [hd1_status],0 |
1721 | mov [hd1_status],0 |
1721 | xor ebx,ebx |
1722 | xor ebx,ebx |
1722 | mov eax,ERROR_ACCESS_DENIED |
1723 | mov eax,ERROR_ACCESS_DENIED |
1723 | ret |
1724 | ret |
1724 | 1725 | ||
1725 | get_dir_size: |
1726 | get_dir_size: |
1726 | ;----------------------------------------------------- |
1727 | ;----------------------------------------------------- |
1727 | ; input : eax = first cluster (0=rootdir) |
1728 | ; input : eax = first cluster (0=rootdir) |
1728 | ; output : eax = directory size in bytes |
1729 | ; output : eax = directory size in bytes |
1729 | ;----------------------------------------------------- |
1730 | ;----------------------------------------------------- |
1730 | push edx |
1731 | push edx |
1731 | xor edx,edx ; count of directory clusters |
1732 | xor edx,edx ; count of directory clusters |
1732 | test eax,eax |
1733 | test eax,eax |
1733 | jnz dir_size_next |
1734 | jnz dir_size_next |
1734 | 1735 | ||
1735 | mov eax,[ROOT_SECTORS] |
1736 | mov eax,[ROOT_SECTORS] |
1736 | shl eax,9 ; fat16 rootdir size in bytes |
1737 | shl eax,9 ; fat16 rootdir size in bytes |
1737 | cmp [fat_type],16 |
1738 | cmp [fat_type],16 |
1738 | je dir_size_ret |
1739 | je dir_size_ret |
1739 | mov eax,[ROOT_CLUSTER] |
1740 | mov eax,[ROOT_CLUSTER] |
1740 | 1741 | ||
1741 | dir_size_next: |
1742 | dir_size_next: |
1742 | cmp eax,2 ; incorrect fat chain |
1743 | cmp eax,2 ; incorrect fat chain |
1743 | jb dir_size_end |
1744 | jb dir_size_end |
1744 | cmp eax,[fatRESERVED] ; end of directory |
1745 | cmp eax,[fatRESERVED] ; end of directory |
1745 | ja dir_size_end |
1746 | ja dir_size_end |
1746 | call get_FAT ; get next cluster |
1747 | call get_FAT ; get next cluster |
1747 | cmp [hd_error],0 |
1748 | cmp [hd_error],0 |
1748 | jne dir_size_ret |
1749 | jne dir_size_ret |
1749 | 1750 | ||
1750 | inc edx |
1751 | inc edx |
1751 | jmp dir_size_next |
1752 | jmp dir_size_next |
1752 | 1753 | ||
1753 | dir_size_end: |
1754 | dir_size_end: |
1754 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
1755 | imul eax,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
1755 | imul eax,edx |
1756 | imul eax,edx |
1756 | 1757 | ||
1757 | dir_size_ret: |
1758 | dir_size_ret: |
1758 | pop edx |
1759 | pop edx |
1759 | ret |
1760 | ret |
1760 | 1761 | ||
1761 | 1762 | ||
1762 | file_delete: |
1763 | file_delete: |
1763 | ;----------------------------------------------------- |
1764 | ;----------------------------------------------------- |
1764 | ; input : eax = file/directory name |
1765 | ; input : eax = file/directory name |
1765 | ; edx = path |
1766 | ; edx = path |
1766 | ; edi = 1 - allow directory remove else don't remove directory |
1767 | ; edi = 1 - allow directory remove else don't remove directory |
1767 | ; output : eax = 0 - ok |
1768 | ; output : eax = 0 - ok |
1768 | ; 3 - unknown FS |
1769 | ; 3 - unknown FS |
1769 | ; 5 - file not found |
1770 | ; 5 - file not found |
1770 | ; 10 - access denied |
1771 | ; 10 - access denied |
1771 | ;----------------------------------------------------- |
1772 | ;----------------------------------------------------- |
1772 | cmp [fat_type],0 |
1773 | cmp [fat_type],0 |
1773 | jnz file_del_fat_ok |
1774 | jnz file_del_fat_ok |
1774 | mov eax,ERROR_UNKNOWN_FS |
1775 | mov eax,ERROR_UNKNOWN_FS |
1775 | ret |
1776 | ret |
1776 | 1777 | ||
1777 | file_del_fat_ok: |
1778 | file_del_fat_ok: |
1778 | pushad |
1779 | pushad |
1779 | 1780 | ||
1780 | mov ebx,edx |
1781 | mov ebx,edx |
1781 | call get_cluster_of_a_path |
1782 | call get_cluster_of_a_path |
1782 | jc file_to_delete_not_found |
1783 | jc file_to_delete_not_found |
1783 | 1784 | ||
1784 | mov ebx,PUSHAD_EAX ; file/directory name |
1785 | mov ebx,PUSHAD_EAX ; file/directory name |
1785 | call analyze_directory |
1786 | call analyze_directory |
1786 | jc file_to_delete_not_found |
1787 | jc file_to_delete_not_found |
1787 | 1788 | ||
1788 | test byte [ebx+11],0x10 ; is it directory? |
1789 | test byte [ebx+11],0x10 ; is it directory? |
1789 | jz delete_notdir ; no. it's file |
1790 | jz delete_notdir ; no. it's file |
1790 | cmp edi,1 ; allow directory remove |
1791 | cmp edi,1 ; allow directory remove |
1791 | jnz delete_no_access ; no |
1792 | jnz delete_no_access ; no |
1792 | 1793 | ||
1793 | push eax ; save directory sector |
1794 | push eax ; save directory sector |
1794 | mov eax,[ebx+20-2] ; first cluster of file |
1795 | mov eax,[ebx+20-2] ; first cluster of file |
1795 | mov ax,[ebx+26] ; 0 length files start cluster = 0 |
1796 | mov ax,[ebx+26] ; 0 length files start cluster = 0 |
1796 | and eax,[fatMASK] |
1797 | and eax,[fatMASK] |
1797 | xor ebp,ebp ; counter for directory deepnes |
1798 | xor ebp,ebp ; counter for directory deepnes |
1798 | call clear_directory |
1799 | call clear_directory |
1799 | pop eax |
1800 | pop eax |
1800 | jc delete_no_access |
1801 | jc delete_no_access |
1801 | 1802 | ||
1802 | push ebx ; save directory pointer in buffer |
1803 | push ebx ; save directory pointer in buffer |
1803 | mov ebx,buffer |
1804 | mov ebx,buffer |
1804 | call hd_read ; read directory sector |
1805 | call hd_read ; read directory sector |
1805 | cmp [hd_error],0 |
1806 | cmp [hd_error],0 |
1806 | jne delete_no_access_1 |
1807 | jne delete_no_access_1 |
1807 | pop ebx |
1808 | pop ebx |
1808 | 1809 | ||
1809 | delete_notdir: |
1810 | delete_notdir: |
1810 | call delete_entry_name |
1811 | call delete_entry_name |
1811 | cmp [hd_error],0 |
1812 | cmp [hd_error],0 |
1812 | jne delete_no_access |
1813 | jne delete_no_access |
1813 | 1814 | ||
1814 | mov eax,ecx ; first cluster of file |
1815 | mov eax,ecx ; first cluster of file |
1815 | call clear_cluster_chain |
1816 | call clear_cluster_chain |
1816 | cmp [hd_error],0 |
1817 | cmp [hd_error],0 |
1817 | jne delete_no_access |
1818 | jne delete_no_access |
1818 | 1819 | ||
1819 | popad |
1820 | popad |
1820 | xor eax,eax |
1821 | xor eax,eax |
1821 | ret |
1822 | ret |
1822 | 1823 | ||
1823 | delete_no_access_1: |
1824 | delete_no_access_1: |
1824 | add esp,4 |
1825 | add esp,4 |
1825 | delete_no_access: |
1826 | delete_no_access: |
1826 | popad |
1827 | popad |
1827 | mov eax,ERROR_ACCESS_DENIED |
1828 | mov eax,ERROR_ACCESS_DENIED |
1828 | ret |
1829 | ret |
1829 | 1830 | ||
1830 | file_to_delete_not_found: |
1831 | file_to_delete_not_found: |
1831 | cmp [hd_error],0 |
1832 | cmp [hd_error],0 |
1832 | jne delete_no_access |
1833 | jne delete_no_access |
1833 | popad |
1834 | popad |
1834 | mov eax,ERROR_FILE_NOT_FOUND |
1835 | mov eax,ERROR_FILE_NOT_FOUND |
1835 | ret |
1836 | ret |
1836 | 1837 | ||
1837 | 1838 | ||
1838 | clear_cluster_chain: |
1839 | clear_cluster_chain: |
1839 | ;----------------------------------------------------- |
1840 | ;----------------------------------------------------- |
1840 | ; input : eax = first cluster |
1841 | ; input : eax = first cluster |
1841 | ;----------------------------------------------------- |
1842 | ;----------------------------------------------------- |
1842 | push eax ecx edx |
1843 | push eax ecx edx |
1843 | xor ecx,ecx ; cluster count |
1844 | xor ecx,ecx ; cluster count |
1844 | mov [f_del],1 ; delete on |
1845 | mov [f_del],1 ; delete on |
1845 | 1846 | ||
1846 | clean_new_chain: |
1847 | clean_new_chain: |
1847 | cmp eax,[LAST_CLUSTER] ; end of file |
1848 | cmp eax,[LAST_CLUSTER] ; end of file |
1848 | ja delete_OK |
1849 | ja delete_OK |
1849 | cmp eax,2 ; unfinished fat chain or zero length file |
1850 | cmp eax,2 ; unfinished fat chain or zero length file |
1850 | jb delete_OK |
1851 | jb delete_OK |
1851 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
1852 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
1852 | jz delete_OK |
1853 | jz delete_OK |
1853 | 1854 | ||
1854 | xor edx,edx |
1855 | xor edx,edx |
1855 | call set_FAT ; clear fat entry |
1856 | call set_FAT ; clear fat entry |
1856 | cmp [hd_error],0 |
1857 | cmp [hd_error],0 |
1857 | jne access_denied_01 |
1858 | jne access_denied_01 |
1858 | 1859 | ||
1859 | inc ecx ; update cluster count |
1860 | inc ecx ; update cluster count |
1860 | mov eax,edx ; old cluster |
1861 | mov eax,edx ; old cluster |
1861 | jmp clean_new_chain |
1862 | jmp clean_new_chain |
1862 | 1863 | ||
1863 | delete_OK: |
1864 | delete_OK: |
1864 | call add_disk_free_space ; add clusters to free disk space |
1865 | call add_disk_free_space ; add clusters to free disk space |
1865 | access_denied_01: |
1866 | access_denied_01: |
1866 | mov [f_del],0 |
1867 | mov [f_del],0 |
1867 | pop edx ecx eax |
1868 | pop edx ecx eax |
1868 | ret |
1869 | ret |
1869 | 1870 | ||
1870 | 1871 | ||
1871 | clear_directory: |
1872 | clear_directory: |
1872 | ;----------------------------------------------------- |
1873 | ;----------------------------------------------------- |
1873 | ; input : eax = directory cluster |
1874 | ; input : eax = directory cluster |
1874 | ; ebp = directory deepnes |
1875 | ; ebp = directory deepnes |
1875 | ; Note : use recursive call |
1876 | ; Note : use recursive call |
1876 | ;----------------------------------------------------- |
1877 | ;----------------------------------------------------- |
1877 | pushad |
1878 | pushad |
1878 | inc ebp |
1879 | inc ebp |
1879 | cmp ebp,64 ; if over 63 directory deep |
1880 | cmp ebp,64 ; if over 63 directory deep |
1880 | jnb clear_error ; something must be wrong |
1881 | jnb clear_error ; something must be wrong |
1881 | 1882 | ||
1882 | clear_new_cluster: |
1883 | clear_new_cluster: |
1883 | cmp eax,[LAST_CLUSTER] |
1884 | cmp eax,[LAST_CLUSTER] |
1884 | ja clear_end |
1885 | ja clear_end |
1885 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
1886 | cmp eax,[ROOT_CLUSTER] ; don't remove root cluster |
1886 | jz clear_end |
1887 | jz clear_end |
1887 | mov esi,eax ; esi = current directory cluster |
1888 | mov esi,eax ; esi = current directory cluster |
1888 | sub eax,2 |
1889 | sub eax,2 |
1889 | jb clear_end |
1890 | jb clear_end |
1890 | mov ecx,[SECTORS_PER_CLUSTER] |
1891 | mov ecx,[SECTORS_PER_CLUSTER] |
1891 | imul eax,ecx |
1892 | imul eax,ecx |
1892 | add eax,[DATA_START] |
1893 | add eax,[DATA_START] |
1893 | 1894 | ||
1894 | clear_new_sector: |
1895 | clear_new_sector: |
1895 | mov edi,eax ; edi = current directory sector |
1896 | mov edi,eax ; edi = current directory sector |
1896 | mov ebx,deltree_buffer |
1897 | mov ebx,deltree_buffer |
1897 | call hd_read |
1898 | call hd_read |
1898 | cmp [hd_error],0 |
1899 | cmp [hd_error],0 |
1899 | jne clear_error |
1900 | jne clear_error |
1900 | 1901 | ||
1901 | mov edx,512/32 ; count of dir entrys per sector = 16 |
1902 | mov edx,512/32 ; count of dir entrys per sector = 16 |
1902 | 1903 | ||
1903 | clear_analyze: |
1904 | clear_analyze: |
1904 | mov al,[ebx+11] ; file attribute |
1905 | mov al,[ebx+11] ; file attribute |
1905 | and al,0xf |
1906 | and al,0xf |
1906 | cmp al,0xf |
1907 | cmp al,0xf |
1907 | je clear_long_filename |
1908 | je clear_long_filename |
1908 | 1909 | ||
1909 | cmp byte [ebx],'.' ; parent or current directory |
1910 | cmp byte [ebx],'.' ; parent or current directory |
1910 | je clear_next_entry |
1911 | je clear_next_entry |
1911 | cmp byte [ebx],0xe5 ; deleted |
1912 | cmp byte [ebx],0xe5 ; deleted |
1912 | je clear_next_entry |
1913 | je clear_next_entry |
1913 | cmp byte [ebx],0 ; empty |
1914 | cmp byte [ebx],0 ; empty |
1914 | je clear_write_last |
1915 | je clear_write_last |
1915 | ;je clear_next_entry |
1916 | ;je clear_next_entry |
1916 | 1917 | ||
1917 | mov eax,[ebx+20-2] ; first cluster of entry |
1918 | mov eax,[ebx+20-2] ; first cluster of entry |
1918 | mov ax,[ebx+26] |
1919 | mov ax,[ebx+26] |
1919 | and eax,[fatMASK] |
1920 | and eax,[fatMASK] |
1920 | 1921 | ||
1921 | test byte [ebx+11],0x10 ; is it directory? |
1922 | test byte [ebx+11],0x10 ; is it directory? |
1922 | jz clear_file ; no |
1923 | jz clear_file ; no |
1923 | 1924 | ||
1924 | push eax ebx |
1925 | push eax ebx |
1925 | mov eax,edi |
1926 | mov eax,edi |
1926 | mov ebx,deltree_buffer ; save buffer over recursive call |
1927 | mov ebx,deltree_buffer ; save buffer over recursive call |
1927 | call hd_write ; write directory sector to disk |
1928 | call hd_write ; write directory sector to disk |
1928 | cmp [hd_error],0 |
1929 | cmp [hd_error],0 |
1929 | jne clear_error |
1930 | jne clear_error |
1930 | 1931 | ||
1931 | pop ebx eax |
1932 | pop ebx eax |
1932 | 1933 | ||
1933 | call clear_directory ; recursive call !!! |
1934 | call clear_directory ; recursive call !!! |
1934 | jc clear_error ; exit if error found |
1935 | jc clear_error ; exit if error found |
1935 | 1936 | ||
1936 | push eax ebx |
1937 | push eax ebx |
1937 | mov eax,edi |
1938 | mov eax,edi |
1938 | mov ebx,deltree_buffer |
1939 | mov ebx,deltree_buffer |
1939 | call hd_read ; read directory sector again |
1940 | call hd_read ; read directory sector again |
1940 | cmp [hd_error],0 |
1941 | cmp [hd_error],0 |
1941 | jne clear_error_1 |
1942 | jne clear_error_1 |
1942 | 1943 | ||
1943 | pop ebx eax |
1944 | pop ebx eax |
1944 | 1945 | ||
1945 | clear_file: |
1946 | clear_file: |
1946 | call clear_cluster_chain |
1947 | call clear_cluster_chain |
1947 | cmp [hd_error],0 |
1948 | cmp [hd_error],0 |
1948 | jne clear_error |
1949 | jne clear_error |
1949 | 1950 | ||
1950 | clear_long_filename: |
1951 | clear_long_filename: |
1951 | mov byte [ebx],0xe5 |
1952 | mov byte [ebx],0xe5 |
1952 | 1953 | ||
1953 | clear_next_entry: |
1954 | clear_next_entry: |
1954 | add ebx,32 ; position of next dir entry |
1955 | add ebx,32 ; position of next dir entry |
1955 | dec edx |
1956 | dec edx |
1956 | jnz clear_analyze |
1957 | jnz clear_analyze |
1957 | 1958 | ||
1958 | mov eax,edi |
1959 | mov eax,edi |
1959 | mov ebx,deltree_buffer |
1960 | mov ebx,deltree_buffer |
1960 | call hd_write ; write directory sector to disk |
1961 | call hd_write ; write directory sector to disk |
1961 | cmp [hd_error],0 |
1962 | cmp [hd_error],0 |
1962 | jne clear_error |
1963 | jne clear_error |
1963 | 1964 | ||
1964 | inc eax ; next sector |
1965 | inc eax ; next sector |
1965 | dec ecx |
1966 | dec ecx |
1966 | jnz clear_new_sector |
1967 | jnz clear_new_sector |
1967 | 1968 | ||
1968 | mov eax,esi |
1969 | mov eax,esi |
1969 | call get_FAT ; get next cluster |
1970 | call get_FAT ; get next cluster |
1970 | cmp [hd_error],0 |
1971 | cmp [hd_error],0 |
1971 | jne clear_error |
1972 | jne clear_error |
1972 | 1973 | ||
1973 | jmp clear_new_cluster ; clear it |
1974 | jmp clear_new_cluster ; clear it |
1974 | 1975 | ||
1975 | clear_write_last: |
1976 | clear_write_last: |
1976 | mov eax,edi |
1977 | mov eax,edi |
1977 | mov ebx,deltree_buffer |
1978 | mov ebx,deltree_buffer |
1978 | call hd_write ; write directory sector to disk |
1979 | call hd_write ; write directory sector to disk |
1979 | cmp [hd_error],0 |
1980 | cmp [hd_error],0 |
1980 | jne clear_error |
1981 | jne clear_error |
1981 | 1982 | ||
1982 | clear_end: |
1983 | clear_end: |
1983 | popad |
1984 | popad |
1984 | clc |
1985 | clc |
1985 | ret |
1986 | ret |
1986 | clear_error_1: |
1987 | clear_error_1: |
1987 | add esp,8 |
1988 | add esp,8 |
1988 | clear_error: |
1989 | clear_error: |
1989 | popad |
1990 | popad |
1990 | stc |
1991 | stc |
1991 | ret |
1992 | ret |
1992 | 1993 | ||
1993 | 1994 | ||
1994 | delete_entry_name: |
1995 | delete_entry_name: |
1995 | ;----------------------------------------------------- |
1996 | ;----------------------------------------------------- |
1996 | ; input : eax = directory sector |
1997 | ; input : eax = directory sector |
1997 | ; ebx = directory pointer in buffer |
1998 | ; ebx = directory pointer in buffer |
1998 | ; longname_sec = 2 previous directory sectors |
1999 | ; longname_sec = 2 previous directory sectors |
1999 | ; output : ecx = first cluster |
2000 | ; output : ecx = first cluster |
2000 | ; change : eax,ebx,edx |
2001 | ; change : eax,ebx,edx |
2001 | ;----------------------------------------------------- |
2002 | ;----------------------------------------------------- |
2002 | mov byte [ebx],0xe5 |
2003 | mov byte [ebx],0xe5 |
2003 | mov ecx,[ebx+20-2] ; first cluster of file |
2004 | mov ecx,[ebx+20-2] ; first cluster of file |
2004 | mov cx,[ebx+26] ; 0 length files start cluster = 0 |
2005 | mov cx,[ebx+26] ; 0 length files start cluster = 0 |
2005 | and ecx,[fatMASK] |
2006 | and ecx,[fatMASK] |
2006 | 2007 | ||
2007 | delete_empty: |
2008 | delete_empty: |
2008 | sub ebx,32 |
2009 | sub ebx,32 |
2009 | cmp ebx,buffer |
2010 | cmp ebx,buffer |
2010 | jnb delete_test_long |
2011 | jnb delete_test_long |
2011 | 2012 | ||
2012 | mov ebx,buffer |
2013 | mov ebx,buffer |
2013 | call hd_write ; write directory sector back |
2014 | call hd_write ; write directory sector back |
2014 | cmp [hd_error],0 |
2015 | cmp [hd_error],0 |
2015 | jne delete_name_end |
2016 | jne delete_name_end |
2016 | 2017 | ||
2017 | xor eax,eax |
2018 | xor eax,eax |
2018 | xchg eax,[longname_sec2] |
2019 | xchg eax,[longname_sec2] |
2019 | xchg eax,[longname_sec1] |
2020 | xchg eax,[longname_sec1] |
2020 | test eax,eax ; is there previous directory sector? |
2021 | test eax,eax ; is there previous directory sector? |
2021 | jz delete_name_end ; no |
2022 | jz delete_name_end ; no |
2022 | 2023 | ||
2023 | mov ebx,buffer |
2024 | mov ebx,buffer |
2024 | call hd_read ; read previous sector |
2025 | call hd_read ; read previous sector |
2025 | cmp [hd_error],0 |
2026 | cmp [hd_error],0 |
2026 | jne delete_name_end |
2027 | jne delete_name_end |
2027 | 2028 | ||
2028 | mov ebx,buffer+0x1e0 ; start from last entry |
2029 | mov ebx,buffer+0x1e0 ; start from last entry |
2029 | 2030 | ||
2030 | delete_test_long: |
2031 | delete_test_long: |
2031 | mov dh,[ebx+11] ; file attribute |
2032 | mov dh,[ebx+11] ; file attribute |
2032 | and dh,0xf |
2033 | and dh,0xf |
2033 | cmp dh,0xf |
2034 | cmp dh,0xf |
2034 | jne delete_write_buffer |
2035 | jne delete_write_buffer |
2035 | 2036 | ||
2036 | cmp byte [ebx],0x40 ; end of long dir entry? |
2037 | cmp byte [ebx],0x40 ; end of long dir entry? |
2037 | mov byte [ebx],0xe5 |
2038 | mov byte [ebx],0xe5 |
2038 | jb delete_empty |
2039 | jb delete_empty |
2039 | 2040 | ||
2040 | delete_write_buffer: |
2041 | delete_write_buffer: |
2041 | mov ebx,buffer |
2042 | mov ebx,buffer |
2042 | call hd_write ; write directory sector back |
2043 | call hd_write ; write directory sector back |
2043 | 2044 | ||
2044 | delete_name_end: |
2045 | delete_name_end: |
2045 | ret |
2046 | ret |
2046 | 2047 | ||
2047 | 2048 | ||
2048 | rename: |
2049 | rename: |
2049 | ;----------------------------------------------------------- |
2050 | ;----------------------------------------------------------- |
2050 | ; input : eax = source directory name |
2051 | ; input : eax = source directory name |
2051 | ; edx = source path |
2052 | ; edx = source path |
2052 | ; ebx = dest directory name |
2053 | ; ebx = dest directory name |
2053 | ; edi = dest path |
2054 | ; edi = dest path |
2054 | ; output : eax = 0 - ok |
2055 | ; output : eax = 0 - ok |
2055 | ; 3 - unknown FS |
2056 | ; 3 - unknown FS |
2056 | ; 5 - file not found |
2057 | ; 5 - file not found |
2057 | ; 8 - disk full |
2058 | ; 8 - disk full |
2058 | ; 10 - access denied |
2059 | ; 10 - access denied |
2059 | ;----------------------------------------------------------- |
2060 | ;----------------------------------------------------------- |
2060 | cmp [fat_type],0 |
2061 | cmp [fat_type],0 |
2061 | jnz fat_ok_for_rename |
2062 | jnz fat_ok_for_rename |
2062 | mov eax,ERROR_UNKNOWN_FS |
2063 | mov eax,ERROR_UNKNOWN_FS |
2063 | ret |
2064 | ret |
2064 | 2065 | ||
2065 | fat_ok_for_rename: |
2066 | fat_ok_for_rename: |
2066 | ; call reserve_hd1 |
2067 | ; call reserve_hd1 |
2067 | 2068 | ||
2068 | pushad |
2069 | pushad |
2069 | 2070 | ||
2070 | mov ebx,edx ; source path |
2071 | mov ebx,edx ; source path |
2071 | call get_cluster_of_a_path |
2072 | call get_cluster_of_a_path |
2072 | jc rename_entry_not_found |
2073 | jc rename_entry_not_found |
2073 | 2074 | ||
2074 | mov ebx,PUSHAD_EAX ; source directory name |
2075 | mov ebx,PUSHAD_EAX ; source directory name |
2075 | call analyze_directory |
2076 | call analyze_directory |
2076 | jc rename_entry_not_found |
2077 | jc rename_entry_not_found |
2077 | 2078 | ||
2078 | mov [sector_tmp],eax ; save source sector |
2079 | mov [sector_tmp],eax ; save source sector |
2079 | mov [entry_pos],ebx |
2080 | mov [entry_pos],ebx |
2080 | mov esi,ebx |
2081 | mov esi,ebx |
2081 | mov edi,dir_entry |
2082 | mov edi,dir_entry |
2082 | mov ecx,32/4 |
2083 | mov ecx,32/4 |
2083 | cld |
2084 | cld |
2084 | rep movsd ; save entry |
2085 | rep movsd ; save entry |
2085 | 2086 | ||
2086 | mov ebx,PUSHAD_EDI ; dest path |
2087 | mov ebx,PUSHAD_EDI ; dest path |
2087 | call get_cluster_of_a_path |
2088 | call get_cluster_of_a_path |
2088 | jc rename_entry_not_found |
2089 | jc rename_entry_not_found |
2089 | 2090 | ||
2090 | mov edx,eax ; save dest directory cluster |
2091 | mov edx,eax ; save dest directory cluster |
2091 | mov ebx,PUSHAD_EBX ; dest directory name |
2092 | mov ebx,PUSHAD_EBX ; dest directory name |
2092 | push [longname_sec1] |
2093 | push [longname_sec1] |
2093 | push [longname_sec2] |
2094 | push [longname_sec2] |
2094 | call analyze_directory ; check if entry already exist |
2095 | call analyze_directory ; check if entry already exist |
2095 | cmp [hd_error],0 |
2096 | cmp [hd_error],0 |
2096 | jne rename_entry_already_exist_1 |
2097 | jne rename_entry_already_exist_1 |
2097 | 2098 | ||
2098 | pop [longname_sec2] |
2099 | pop [longname_sec2] |
2099 | pop [longname_sec1] |
2100 | pop [longname_sec1] |
2100 | jnc rename_entry_already_exist |
2101 | jnc rename_entry_already_exist |
2101 | 2102 | ||
2102 | mov eax,edx |
2103 | mov eax,edx |
2103 | call analyze_directory_to_write |
2104 | call analyze_directory_to_write |
2104 | jc rename_disk_full |
2105 | jc rename_disk_full |
2105 | 2106 | ||
2106 | mov esi,dir_entry |
2107 | mov esi,dir_entry |
2107 | mov edi,ebx |
2108 | mov edi,ebx |
2108 | mov ecx,32/4 |
2109 | mov ecx,32/4 |
2109 | cld |
2110 | cld |
2110 | rep movsd ; copy entry |
2111 | rep movsd ; copy entry |
2111 | mov esi,PUSHAD_EBX ; dest directory name |
2112 | mov esi,PUSHAD_EBX ; dest directory name |
2112 | mov edi,ebx |
2113 | mov edi,ebx |
2113 | mov ecx,11 |
2114 | mov ecx,11 |
2114 | rep movsb ; copy name |
2115 | rep movsb ; copy name |
2115 | 2116 | ||
2116 | mov ebx,buffer ; save the directory name,length,cluster |
2117 | mov ebx,buffer ; save the directory name,length,cluster |
2117 | call hd_write |
2118 | call hd_write |
2118 | 2119 | ||
2119 | test byte [dir_entry+11],0x10 ; is it directory? |
2120 | test byte [dir_entry+11],0x10 ; is it directory? |
2120 | jz rename_not_dir ; no |
2121 | jz rename_not_dir ; no |
2121 | mov eax,[dir_entry+20-2] ; FAT entry |
2122 | mov eax,[dir_entry+20-2] ; FAT entry |
2122 | mov ax,[dir_entry+26] |
2123 | mov ax,[dir_entry+26] |
2123 | and eax,[fatMASK] |
2124 | and eax,[fatMASK] |
2124 | call change_2dot_cluster |
2125 | call change_2dot_cluster |
2125 | cmp [hd_error],0 |
2126 | cmp [hd_error],0 |
2126 | jne rename_entry_already_exist |
2127 | jne rename_entry_already_exist |
2127 | 2128 | ||
2128 | rename_not_dir: |
2129 | rename_not_dir: |
2129 | cmp [hd_error],0 |
2130 | cmp [hd_error],0 |
2130 | jne rename_entry_already_exist |
2131 | jne rename_entry_already_exist |
2131 | mov eax,[sector_tmp] |
2132 | mov eax,[sector_tmp] |
2132 | mov ebx,buffer |
2133 | mov ebx,buffer |
2133 | call hd_read ; read source directory sector |
2134 | call hd_read ; read source directory sector |
2134 | cmp [hd_error],0 |
2135 | cmp [hd_error],0 |
2135 | jne rename_entry_already_exist |
2136 | jne rename_entry_already_exist |
2136 | 2137 | ||
2137 | mov ebx,[entry_pos] |
2138 | mov ebx,[entry_pos] |
2138 | call delete_entry_name |
2139 | call delete_entry_name |
2139 | cmp [hd_error],0 |
2140 | cmp [hd_error],0 |
2140 | jne rename_entry_already_exist |
2141 | jne rename_entry_already_exist |
2141 | 2142 | ||
2142 | popad |
2143 | popad |
2143 | call update_disk ; write all of cache and fat to hd |
2144 | call update_disk ; write all of cache and fat to hd |
2144 | cmp [hd_error],0 |
2145 | cmp [hd_error],0 |
2145 | jne rename_entry_already_exist_2 |
2146 | jne rename_entry_already_exist_2 |
2146 | mov [hd1_status],0 |
2147 | mov [hd1_status],0 |
2147 | xor eax,eax |
2148 | xor eax,eax |
2148 | ret |
2149 | ret |
2149 | 2150 | ||
2150 | rename_entry_not_found: |
2151 | rename_entry_not_found: |
2151 | cmp [hd_error],0 |
2152 | cmp [hd_error],0 |
2152 | jne rename_entry_already_exist |
2153 | jne rename_entry_already_exist |
2153 | popad |
2154 | popad |
2154 | mov [hd1_status],0 |
2155 | mov [hd1_status],0 |
2155 | mov eax,ERROR_FILE_NOT_FOUND |
2156 | mov eax,ERROR_FILE_NOT_FOUND |
2156 | ret |
2157 | ret |
2157 | 2158 | ||
2158 | rename_entry_already_exist_1: |
2159 | rename_entry_already_exist_1: |
2159 | add esp,8 |
2160 | add esp,8 |
2160 | rename_entry_already_exist: |
2161 | rename_entry_already_exist: |
2161 | popad |
2162 | popad |
2162 | rename_entry_already_exist_2: |
2163 | rename_entry_already_exist_2: |
2163 | mov [hd1_status],0 |
2164 | mov [hd1_status],0 |
2164 | mov eax,ERROR_ACCESS_DENIED |
2165 | mov eax,ERROR_ACCESS_DENIED |
2165 | ret |
2166 | ret |
2166 | 2167 | ||
2167 | rename_disk_full: |
2168 | rename_disk_full: |
2168 | cmp [hd_error],0 |
2169 | cmp [hd_error],0 |
2169 | jne rename_entry_already_exist |
2170 | jne rename_entry_already_exist |
2170 | popad |
2171 | popad |
2171 | mov [hd1_status],0 |
2172 | mov [hd1_status],0 |
2172 | mov eax,ERROR_DISK_FULL |
2173 | mov eax,ERROR_DISK_FULL |
2173 | ret |
2174 | ret |
2174 | 2175 | ||
2175 | 2176 | ||
2176 | change_2dot_cluster: |
2177 | change_2dot_cluster: |
2177 | ;----------------------------------------------------------- |
2178 | ;----------------------------------------------------------- |
2178 | ; input : eax = directory cluster |
2179 | ; input : eax = directory cluster |
2179 | ; edx = value to save |
2180 | ; edx = value to save |
2180 | ; change : eax,ebx,edx |
2181 | ; change : eax,ebx,edx |
2181 | ;----------------------------------------------------------- |
2182 | ;----------------------------------------------------------- |
2182 | cmp eax,[LAST_CLUSTER] |
2183 | cmp eax,[LAST_CLUSTER] |
2183 | ja not_2dot ; too big cluster number, something is wrong |
2184 | ja not_2dot ; too big cluster number, something is wrong |
2184 | sub eax,2 |
2185 | sub eax,2 |
2185 | jb not_2dot |
2186 | jb not_2dot |
2186 | 2187 | ||
2187 | imul eax,[SECTORS_PER_CLUSTER] |
2188 | imul eax,[SECTORS_PER_CLUSTER] |
2188 | add eax,[DATA_START] |
2189 | add eax,[DATA_START] |
2189 | mov ebx,buffer |
2190 | mov ebx,buffer |
2190 | call hd_read |
2191 | call hd_read |
2191 | cmp [hd_error],0 |
2192 | cmp [hd_error],0 |
2192 | jne not_2dot |
2193 | jne not_2dot |
2193 | 2194 | ||
2194 | cmp dword [ebx+32],'.. ' |
2195 | cmp dword [ebx+32],'.. ' |
2195 | jnz not_2dot |
2196 | jnz not_2dot |
2196 | 2197 | ||
2197 | cmp edx,[ROOT_CLUSTER] ; is rootdir cluster? |
2198 | cmp edx,[ROOT_CLUSTER] ; is rootdir cluster? |
2198 | jne not_2dot_root |
2199 | jne not_2dot_root |
2199 | xor edx,edx ; yes. set it zero |
2200 | xor edx,edx ; yes. set it zero |
2200 | 2201 | ||
2201 | not_2dot_root: |
2202 | not_2dot_root: |
2202 | mov [ebx+32+26],dx ; 16 bits low of cluster |
2203 | mov [ebx+32+26],dx ; 16 bits low of cluster |
2203 | shr edx,16 |
2204 | shr edx,16 |
2204 | mov [ebx+32+20],dx ; 16 bits high of cluster (=0 fat16) |
2205 | mov [ebx+32+20],dx ; 16 bits high of cluster (=0 fat16) |
2205 | call hd_write |
2206 | call hd_write |
2206 | 2207 | ||
2207 | not_2dot: |
2208 | not_2dot: |
2208 | ret |
2209 | ret |
2209 | 2210 | ||
2210 | 2211 | ||
2211 | get_hd_info: |
2212 | get_hd_info: |
2212 | ;----------------------------------------------------------- |
2213 | ;----------------------------------------------------------- |
2213 | ; output : eax = 0 - ok |
2214 | ; output : eax = 0 - ok |
2214 | ; 3 - unknown FS |
2215 | ; 3 - unknown FS |
2215 | ; 10 - access denied |
2216 | ; 10 - access denied |
2216 | ; edx = cluster size in bytes |
2217 | ; edx = cluster size in bytes |
2217 | ; ebx = total clusters on disk |
2218 | ; ebx = total clusters on disk |
2218 | ; ecx = free clusters on disk |
2219 | ; ecx = free clusters on disk |
2219 | ;----------------------------------------------------------- |
2220 | ;----------------------------------------------------------- |
2220 | cmp [fat_type],0 |
2221 | cmp [fat_type],0 |
2221 | jnz info_fat_ok |
2222 | jnz info_fat_ok |
2222 | xor edx,edx |
2223 | xor edx,edx |
2223 | xor ebx,ebx |
2224 | xor ebx,ebx |
2224 | xor ecx,ecx |
2225 | xor ecx,ecx |
2225 | mov eax,ERROR_UNKNOWN_FS |
2226 | mov eax,ERROR_UNKNOWN_FS |
2226 | ret |
2227 | ret |
2227 | 2228 | ||
2228 | info_fat_ok: |
2229 | info_fat_ok: |
2229 | ; call reserve_hd1 |
2230 | ; call reserve_hd1 |
2230 | 2231 | ||
2231 | xor ecx,ecx ; count of free clusters |
2232 | xor ecx,ecx ; count of free clusters |
2232 | mov eax,2 |
2233 | mov eax,2 |
2233 | mov ebx,[LAST_CLUSTER] |
2234 | mov ebx,[LAST_CLUSTER] |
2234 | 2235 | ||
2235 | info_cluster: |
2236 | info_cluster: |
2236 | push eax |
2237 | push eax |
2237 | call get_FAT ; get cluster info |
2238 | call get_FAT ; get cluster info |
2238 | cmp [hd_error],0 |
2239 | cmp [hd_error],0 |
2239 | jne info_access_denied |
2240 | jne info_access_denied |
2240 | 2241 | ||
2241 | test eax,eax ; is it free? |
2242 | test eax,eax ; is it free? |
2242 | jnz info_used ; no |
2243 | jnz info_used ; no |
2243 | inc ecx |
2244 | inc ecx |
2244 | 2245 | ||
2245 | info_used: |
2246 | info_used: |
2246 | pop eax |
2247 | pop eax |
2247 | inc eax |
2248 | inc eax |
2248 | cmp eax,ebx ; is above last cluster? |
2249 | cmp eax,ebx ; is above last cluster? |
2249 | jbe info_cluster ; no. test next cluster |
2250 | jbe info_cluster ; no. test next cluster |
2250 | 2251 | ||
2251 | dec ebx ; cluster count |
2252 | dec ebx ; cluster count |
2252 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
2253 | imul edx,[SECTORS_PER_CLUSTER],512 ; cluster size in bytes |
2253 | mov [hd1_status],0 |
2254 | mov [hd1_status],0 |
2254 | xor eax,eax |
2255 | xor eax,eax |
2255 | ret |
2256 | ret |
2256 | 2257 | ||
2257 | info_access_denied: |
2258 | info_access_denied: |
2258 | add esp,4 |
2259 | add esp,4 |
2259 | xor edx,edx |
2260 | xor edx,edx |
2260 | xor ebx,ebx |
2261 | xor ebx,ebx |
2261 | xor ecx,ecx |
2262 | xor ecx,ecx |
2262 | mov eax,ERROR_ACCESS_DENIED |
2263 | mov eax,ERROR_ACCESS_DENIED |
2263 | ret |
2264 | ret |
2264 | 2265 | ||
2265 | update_disk: |
2266 | update_disk: |
2266 | ;----------------------------------------------------------- |
2267 | ;----------------------------------------------------------- |
2267 | ; write changed fat and cache to disk |
2268 | ; write changed fat and cache to disk |
2268 | ;----------------------------------------------------------- |
2269 | ;----------------------------------------------------------- |
2269 | cmp [fat_change],0 ; is fat changed? |
2270 | cmp [fat_change],0 ; is fat changed? |
2270 | je upd_no_change |
2271 | je upd_no_change |
2271 | 2272 | ||
2272 | call write_fat_sector |
2273 | call write_fat_sector |
2273 | cmp [hd_error],0 |
2274 | cmp [hd_error],0 |
2274 | jne update_disk_acces_denied |
2275 | jne update_disk_acces_denied |
2275 | 2276 | ||
2276 | upd_no_change: |
2277 | upd_no_change: |
2277 | 2278 | ||
2278 | call write_cache |
2279 | call write_cache |
2279 | update_disk_acces_denied: |
2280 | update_disk_acces_denied: |
2280 | ret |
2281 | ret |
2281 | 2282 | ||
2282 | 2283 | ||
2283 | ;************************************************************************** |
2284 | ;************************************************************************** |
2284 | ; |
2285 | ; |
2285 | ; 0x600008 - first entry in cache list |
2286 | ; 0x600008 - first entry in cache list |
2286 | ; |
2287 | ; |
2287 | ; +0 - lba sector |
2288 | ; +0 - lba sector |
2288 | ; +4 - state of cache sector |
2289 | ; +4 - state of cache sector |
2289 | ; 0 = empty |
2290 | ; 0 = empty |
2290 | ; 1 = used for read ( same as in hd ) |
2291 | ; 1 = used for read ( same as in hd ) |
2291 | ; 2 = used for write ( differs from hd ) |
2292 | ; 2 = used for write ( differs from hd ) |
2292 | ; |
2293 | ; |
2293 | ; +65536 - cache entries |
2294 | ; +65536 - cache entries |
2294 | ; |
2295 | ; |
2295 | ;************************************************************************** |
2296 | ;************************************************************************** |
2296 | 2297 | ||
2297 | 2298 | ||
2298 | hd_read: |
2299 | hd_read: |
2299 | ;----------------------------------------------------------- |
2300 | ;----------------------------------------------------------- |
2300 | ; input : eax = block to read |
2301 | ; input : eax = block to read |
2301 | ; ebx = destination |
2302 | ; ebx = destination |
2302 | ;----------------------------------------------------------- |
2303 | ;----------------------------------------------------------- |
2303 | push ecx esi edi ; scan cache |
2304 | push ecx esi edi ; scan cache |
2304 | 2305 | ||
2305 | mov ecx,cache_max ; entries in cache |
2306 | mov ecx,cache_max ; entries in cache |
2306 | mov esi,0x600000+8 |
2307 | mov esi,0x600000+8 |
2307 | mov edi,1 |
2308 | mov edi,1 |
2308 | 2309 | ||
2309 | hdreadcache: |
2310 | hdreadcache: |
2310 | 2311 | ||
2311 | cmp dword [esi+4],0 ; empty |
2312 | cmp dword [esi+4],0 ; empty |
2312 | je nohdcache |
2313 | je nohdcache |
2313 | 2314 | ||
2314 | cmp [esi],eax ; correct sector |
2315 | cmp [esi],eax ; correct sector |
2315 | je yeshdcache |
2316 | je yeshdcache |
2316 | 2317 | ||
2317 | nohdcache: |
2318 | nohdcache: |
2318 | 2319 | ||
2319 | add esi,8 |
2320 | add esi,8 |
2320 | inc edi |
2321 | inc edi |
2321 | dec ecx |
2322 | dec ecx |
2322 | jnz hdreadcache |
2323 | jnz hdreadcache |
2323 | 2324 | ||
2324 | call find_empty_slot ; ret in edi |
2325 | call find_empty_slot ; ret in edi |
2325 | cmp [hd_error],0 |
2326 | cmp [hd_error],0 |
2326 | jne return_01 |
2327 | jne return_01 |
2327 | 2328 | ||
2328 | push eax edx |
2329 | push eax edx |
2329 | 2330 | ||
2330 | call wait_for_hd_idle |
2331 | call wait_for_hd_idle |
2331 | cmp [hd_error],0 |
2332 | cmp [hd_error],0 |
2332 | jne hd_read_error |
2333 | jne hd_read_error |
2333 | 2334 | ||
2334 | cli |
2335 | cli |
2335 | xor eax,eax |
2336 | xor eax,eax |
2336 | mov edx,[hdbase] |
2337 | mov edx,[hdbase] |
2337 | inc edx |
2338 | inc edx |
2338 | out dx,al ; ATAFeatures à ¥£¨áâà "®á®¡¥Â®á⥩" |
2339 | out dx,al ; ATAFeatures à ¥£¨áâà "®á®¡¥Â®á⥩" |
2339 | inc edx |
2340 | inc edx |
2340 | inc eax |
2341 | inc eax |
2341 | out dx,al ; ATASectorCount áç¥â稪 ᥪâ®à ®¢ |
2342 | out dx,al ; ATASectorCount áç¥â稪 ᥪâ®à ®¢ |
2342 | inc edx |
2343 | inc edx |
2343 | mov eax,[esp+4] |
2344 | mov eax,[esp+4] |
2344 | out dx,al ; ATASectorNumber à ¥£¨áâà ®¬¥à  á¥ªâ®à  |
2345 | out dx,al ; ATASectorNumber à ¥£¨áâà ®¬¥à  á¥ªâ®à  |
2345 | shr eax,8 |
2346 | shr eax,8 |
2346 | inc edx |
2347 | inc edx |
2347 | out dx,al ; ATACylinder ®¬¥à 樫¨Â¤à  (¬« ¤è¨© ¡ ©â) |
2348 | out dx,al ; ATACylinder ®¬¥à 樫¨Â¤à  (¬« ¤è¨© ¡ ©â) |
2348 | shr eax,8 |
2349 | shr eax,8 |
2349 | inc edx |
2350 | inc edx |
2350 | out dx,al ; ®¬¥à 樫¨Â¤à  (áâ à 訩 ¡ ©â) |
2351 | out dx,al ; ®¬¥à 樫¨Â¤à  (áâ à 訩 ¡ ©â) |
2351 | shr eax,8 |
2352 | shr eax,8 |
2352 | inc edx |
2353 | inc edx |
2353 | and al,1+2+4+8 |
2354 | and al,1+2+4+8 |
2354 | add al,byte [hdid] |
2355 | add al,byte [hdid] |
2355 | add al,128+64+32 |
2356 | add al,128+64+32 |
2356 | out dx,al ; ®¬¥à £®«®¢ª¨/®¬¥à ¤¨áª |
2357 | out dx,al ; ®¬¥à £®«®¢ª¨/®¬¥à ¤¨áª |
2357 | inc edx |
2358 | inc edx |
2358 | mov al,20h |
2359 | mov al,20h |
2359 | out dx,al ; ATACommand à ¥£¨áâà ª®¬ Â¤ |
2360 | out dx,al ; ATACommand à ¥£¨áâà ª®¬ Â¤ |
2360 | sti |
2361 | sti |
2361 | 2362 | ||
2362 | call wait_for_sector_buffer |
2363 | call wait_for_sector_buffer |
2363 | 2364 | ||
2364 | cmp [hd_error],0 |
2365 | cmp [hd_error],0 |
2365 | jne hd_read_error |
2366 | jne hd_read_error |
2366 | 2367 | ||
2367 | cli |
2368 | cli |
2368 | push edi |
2369 | push edi |
2369 | shl edi,9 |
2370 | shl edi,9 |
2370 | add edi,0x600000+65536 |
2371 | add edi,0x600000+65536 |
2371 | mov ecx,256 |
2372 | mov ecx,256 |
2372 | mov edx,[hdbase] |
2373 | mov edx,[hdbase] |
2373 | cld |
2374 | cld |
2374 | rep insw |
2375 | rep insw |
2375 | pop edi |
2376 | pop edi |
2376 | sti |
2377 | sti |
2377 | 2378 | ||
2378 | pop edx eax |
2379 | pop edx eax |
2379 | blok_read_2: |
2380 | blok_read_2: |
2380 | lea esi,[edi*8+0x600000] |
2381 | lea esi,[edi*8+0x600000] |
2381 | mov [esi],eax ; sector number |
2382 | mov [esi],eax ; sector number |
2382 | mov dword [esi+4],1 ; hd read - mark as same as in hd |
2383 | mov dword [esi+4],1 ; hd read - mark as same as in hd |
2383 | 2384 | ||
2384 | yeshdcache: |
2385 | yeshdcache: |
2385 | 2386 | ||
2386 | mov esi,edi |
2387 | mov esi,edi |
2387 | shl esi,9 |
2388 | shl esi,9 |
2388 | add esi,0x600000+65536 |
2389 | add esi,0x600000+65536 |
2389 | mov edi,ebx |
2390 | mov edi,ebx |
2390 | mov ecx,512/4 |
2391 | mov ecx,512/4 |
2391 | cld |
2392 | cld |
2392 | rep movsd ; move data |
2393 | rep movsd ; move data |
2393 | return_01: |
2394 | return_01: |
2394 | pop edi esi ecx |
2395 | pop edi esi ecx |
2395 | ret |
2396 | ret |
2396 | 2397 | ||
2397 | 2398 | ||
2398 | hd_write: |
2399 | hd_write: |
2399 | ;----------------------------------------------------------- |
2400 | ;----------------------------------------------------------- |
2400 | ; input : eax = block |
2401 | ; input : eax = block |
2401 | ; ebx = pointer to memory |
2402 | ; ebx = pointer to memory |
2402 | ;----------------------------------------------------------- |
2403 | ;----------------------------------------------------------- |
2403 | push ecx esi edi |
2404 | push ecx esi edi |
2404 | 2405 | ||
2405 | ; check if the cache already has the sector and overwrite it |
2406 | ; check if the cache already has the sector and overwrite it |
2406 | 2407 | ||
2407 | mov ecx,cache_max |
2408 | mov ecx,cache_max |
2408 | mov esi,0x600000+8 |
2409 | mov esi,0x600000+8 |
2409 | mov edi,1 |
2410 | mov edi,1 |
2410 | 2411 | ||
2411 | hdwritecache: |
2412 | hdwritecache: |
2412 | 2413 | ||
2413 | cmp dword [esi+4],0 ; if cache slot is empty |
2414 | cmp dword [esi+4],0 ; if cache slot is empty |
2414 | je not_in_cache_write |
2415 | je not_in_cache_write |
2415 | 2416 | ||
2416 | cmp [esi],eax ; if the slot has the sector |
2417 | cmp [esi],eax ; if the slot has the sector |
2417 | je yes_in_cache_write |
2418 | je yes_in_cache_write |
2418 | 2419 | ||
2419 | not_in_cache_write: |
2420 | not_in_cache_write: |
2420 | 2421 | ||
2421 | add esi,8 |
2422 | add esi,8 |
2422 | inc edi |
2423 | inc edi |
2423 | dec ecx |
2424 | dec ecx |
2424 | jnz hdwritecache |
2425 | jnz hdwritecache |
2425 | 2426 | ||
2426 | ; sector not found in cache |
2427 | ; sector not found in cache |
2427 | ; write the block to a new location |
2428 | ; write the block to a new location |
2428 | 2429 | ||
2429 | call find_empty_slot ; ret in edi |
2430 | call find_empty_slot ; ret in edi |
2430 | cmp [hd_error],0 |
2431 | cmp [hd_error],0 |
2431 | jne hd_write_access_denied |
2432 | jne hd_write_access_denied |
2432 | 2433 | ||
2433 | lea esi,[edi*8+0x600000] |
2434 | lea esi,[edi*8+0x600000] |
2434 | mov [esi],eax ; sector number |
2435 | mov [esi],eax ; sector number |
2435 | 2436 | ||
2436 | yes_in_cache_write: |
2437 | yes_in_cache_write: |
2437 | 2438 | ||
2438 | mov dword [esi+4],2 ; write - differs from hd |
2439 | mov dword [esi+4],2 ; write - differs from hd |
2439 | 2440 | ||
2440 | shl edi,9 |
2441 | shl edi,9 |
2441 | add edi,0x600000+65536 |
2442 | add edi,0x600000+65536 |
2442 | mov esi,ebx |
2443 | mov esi,ebx |
2443 | mov ecx,512/4 |
2444 | mov ecx,512/4 |
2444 | cld |
2445 | cld |
2445 | rep movsd ; move data |
2446 | rep movsd ; move data |
2446 | hd_write_access_denied: |
2447 | hd_write_access_denied: |
2447 | pop edi esi ecx |
2448 | pop edi esi ecx |
2448 | ret |
2449 | ret |
2449 | 2450 | ||
2450 | 2451 | ||
2451 | write_cache: |
2452 | write_cache: |
2452 | ;----------------------------------------------------------- |
2453 | ;----------------------------------------------------------- |
2453 | ; write all changed sectors to disk |
2454 | ; write all changed sectors to disk |
2454 | ;----------------------------------------------------------- |
2455 | ;----------------------------------------------------------- |
2455 | push eax ecx edx esi edi |
2456 | push eax ecx edx esi edi |
2456 | 2457 | ||
2457 | ; write difference ( 2 ) from cache to hd |
2458 | ; write difference ( 2 ) from cache to hd |
2458 | 2459 | ||
2459 | mov ecx,cache_max |
2460 | mov ecx,cache_max |
2460 | mov esi,0x600000+8 |
2461 | mov esi,0x600000+8 |
2461 | mov edi,1 |
2462 | mov edi,1 |
2462 | 2463 | ||
2463 | write_cache_more: |
2464 | write_cache_more: |
2464 | 2465 | ||
2465 | cmp dword [esi+4],2 ; if cache slot is not different |
2466 | cmp dword [esi+4],2 ; if cache slot is not different |
2466 | jne does_not_need_writing |
2467 | jne does_not_need_writing |
2467 | 2468 | ||
2468 | mov dword [esi+4],1 ; same as in hd |
2469 | mov dword [esi+4],1 ; same as in hd |
2469 | mov eax,[esi] ; eax = sector to write |
2470 | mov eax,[esi] ; eax = sector to write |
2470 | 2471 | ||
2471 | cmp eax,[PARTITION_START] |
2472 | cmp eax,[PARTITION_START] |
2472 | jb danger |
2473 | jb danger |
2473 | cmp eax,[PARTITION_END] |
2474 | cmp eax,[PARTITION_END] |
2474 | ja danger |
2475 | ja danger |
2475 | 2476 | ||
2476 | call wait_for_hd_idle |
2477 | call wait_for_hd_idle |
2477 | cmp [hd_error],0 |
2478 | cmp [hd_error],0 |
2478 | jne hd_write_error |
2479 | jne hd_write_error |
2479 | 2480 | ||
2480 | cli |
2481 | cli |
2481 | xor eax,eax |
2482 | xor eax,eax |
2482 | mov edx,[hdbase] |
2483 | mov edx,[hdbase] |
2483 | inc edx |
2484 | inc edx |
2484 | out dx,al |
2485 | out dx,al |
2485 | inc edx |
2486 | inc edx |
2486 | inc eax |
2487 | inc eax |
2487 | out dx,al |
2488 | out dx,al |
2488 | inc edx |
2489 | inc edx |
2489 | mov eax,[esi] ; eax = sector to write |
2490 | mov eax,[esi] ; eax = sector to write |
2490 | out dx,al |
2491 | out dx,al |
2491 | shr eax,8 |
2492 | shr eax,8 |
2492 | inc edx |
2493 | inc edx |
2493 | out dx,al |
2494 | out dx,al |
2494 | shr eax,8 |
2495 | shr eax,8 |
2495 | inc edx |
2496 | inc edx |
2496 | out dx,al |
2497 | out dx,al |
2497 | shr eax,8 |
2498 | shr eax,8 |
2498 | inc edx |
2499 | inc edx |
2499 | and al,1+2+4+8 |
2500 | and al,1+2+4+8 |
2500 | add al,byte [hdid] |
2501 | add al,byte [hdid] |
2501 | add al,128+64+32 |
2502 | add al,128+64+32 |
2502 | out dx,al |
2503 | out dx,al |
2503 | inc edx |
2504 | inc edx |
2504 | mov al,30h |
2505 | mov al,30h |
2505 | out dx,al |
2506 | out dx,al |
2506 | sti |
2507 | sti |
2507 | 2508 | ||
2508 | call wait_for_sector_buffer |
2509 | call wait_for_sector_buffer |
2509 | 2510 | ||
2510 | cmp [hd_error],0 |
2511 | cmp [hd_error],0 |
2511 | jne hd_write_error |
2512 | jne hd_write_error |
2512 | 2513 | ||
2513 | push ecx esi |
2514 | push ecx esi |
2514 | 2515 | ||
2515 | cli |
2516 | cli |
2516 | mov esi,edi |
2517 | mov esi,edi |
2517 | shl esi,9 |
2518 | shl esi,9 |
2518 | add esi,0x600000+65536 ; esi = from memory position |
2519 | add esi,0x600000+65536 ; esi = from memory position |
2519 | mov ecx,256 |
2520 | mov ecx,256 |
2520 | mov edx,[hdbase] |
2521 | mov edx,[hdbase] |
2521 | cld |
2522 | cld |
2522 | rep outsw |
2523 | rep outsw |
2523 | sti |
2524 | sti |
2524 | 2525 | ||
2525 | pop esi ecx |
2526 | pop esi ecx |
2526 | 2527 | ||
2527 | danger: |
2528 | danger: |
2528 | does_not_need_writing: |
2529 | does_not_need_writing: |
2529 | 2530 | ||
2530 | add esi,8 |
2531 | add esi,8 |
2531 | inc edi |
2532 | inc edi |
2532 | dec ecx |
2533 | dec ecx |
2533 | jnz write_cache_more |
2534 | jnz write_cache_more |
2534 | return_02: |
2535 | return_02: |
2535 | pop edi esi edx ecx eax |
2536 | pop edi esi edx ecx eax |
2536 | ret |
2537 | ret |
2537 | 2538 | ||
2538 | 2539 | ||
2539 | find_empty_slot: |
2540 | find_empty_slot: |
2540 | ;----------------------------------------------------------- |
2541 | ;----------------------------------------------------------- |
2541 | ; find empty or read slot, flush cache if next 10% is used by write |
2542 | ; find empty or read slot, flush cache if next 10% is used by write |
2542 | ; output : edi = cache slot |
2543 | ; output : edi = cache slot |
2543 | ;----------------------------------------------------------- |
2544 | ;----------------------------------------------------------- |
2544 | push ecx esi |
2545 | push ecx esi |
2545 | 2546 | ||
2546 | search_again: |
2547 | search_again: |
2547 | 2548 | ||
2548 | mov ecx,cache_max*10/100 |
2549 | mov ecx,cache_max*10/100 |
2549 | mov edi,[cache_search_start] |
2550 | mov edi,[cache_search_start] |
2550 | 2551 | ||
2551 | search_for_empty: |
2552 | search_for_empty: |
2552 | 2553 | ||
2553 | inc edi |
2554 | inc edi |
2554 | cmp edi,cache_max |
2555 | cmp edi,cache_max |
2555 | jbe inside_cache |
2556 | jbe inside_cache |
2556 | mov edi,1 |
2557 | mov edi,1 |
2557 | 2558 | ||
2558 | inside_cache: |
2559 | inside_cache: |
2559 | 2560 | ||
2560 | cmp dword [edi*8+0x600000+4],2 ; get cache slot info |
2561 | cmp dword [edi*8+0x600000+4],2 ; get cache slot info |
2561 | jb found_slot ; it's empty or read |
2562 | jb found_slot ; it's empty or read |
2562 | dec ecx |
2563 | dec ecx |
2563 | jnz search_for_empty |
2564 | jnz search_for_empty |
2564 | 2565 | ||
2565 | call write_cache ; no empty slots found, write all |
2566 | call write_cache ; no empty slots found, write all |
2566 | cmp [hd_error],0 |
2567 | cmp [hd_error],0 |
2567 | jne found_slot_access_denied |
2568 | jne found_slot_access_denied |
2568 | 2569 | ||
2569 | jmp search_again ; and start again |
2570 | jmp search_again ; and start again |
2570 | 2571 | ||
2571 | found_slot: |
2572 | found_slot: |
2572 | 2573 | ||
2573 | mov [cache_search_start],edi |
2574 | mov [cache_search_start],edi |
2574 | found_slot_access_denied: |
2575 | found_slot_access_denied: |
2575 | pop esi ecx |
2576 | pop esi ecx |
2576 | ret |
2577 | ret |
2577 | 2578 | ||
2578 | 2579 | ||
2579 | save_hd_wait_timeout: |
2580 | save_hd_wait_timeout: |
2580 | 2581 | ||
2581 | push eax |
2582 | push eax |
2582 | mov eax,[timer_ticks];[0xfdf0] |
2583 | mov eax,[timer_ticks];[0xfdf0] |
2583 | add eax,300 ; 3 sec timeout |
2584 | add eax,300 ; 3 sec timeout |
2584 | mov [hd_wait_timeout],eax |
2585 | mov [hd_wait_timeout],eax |
2585 | pop eax |
2586 | pop eax |
2586 | ret |
2587 | ret |
2587 | 2588 | ||
2588 | 2589 | ||
2589 | check_hd_wait_timeout: |
2590 | check_hd_wait_timeout: |
2590 | 2591 | ||
2591 | push eax |
2592 | push eax |
2592 | mov eax,[hd_wait_timeout] |
2593 | mov eax,[hd_wait_timeout] |
2593 | cmp [timer_ticks], eax ;[0xfdf0],eax |
2594 | cmp [timer_ticks], eax ;[0xfdf0],eax |
2594 | jg hd_timeout_error |
2595 | jg hd_timeout_error |
2595 | pop eax |
2596 | pop eax |
2596 | mov [hd_error],0 |
2597 | mov [hd_error],0 |
2597 | ret |
2598 | ret |
2598 | 2599 | ||
2599 | iglobal |
2600 | iglobal |
2600 | hd_timeout_str db 'K : FS - HD timeout',13,10,0 |
2601 | hd_timeout_str db 'K : FS - HD timeout',13,10,0 |
2601 | hd_read_str db 'K : FS - HD read error',13,10,0 |
2602 | hd_read_str db 'K : FS - HD read error',13,10,0 |
2602 | hd_write_str db 'K : FS - HD write error',13,10,0 |
2603 | hd_write_str db 'K : FS - HD write error',13,10,0 |
2603 | hd_lba_str db 'K : FS - HD LBA error',13,10,0 |
2604 | hd_lba_str db 'K : FS - HD LBA error',13,10,0 |
2604 | endg |
2605 | endg |
2605 | 2606 | ||
2606 | hd_timeout_error: |
2607 | hd_timeout_error: |
2607 | 2608 | ||
2608 | call clear_hd_cache |
2609 | call clear_hd_cache |
2609 | call clear_application_table_status |
2610 | call clear_application_table_status |
2610 | mov esi,hd_timeout_str |
2611 | mov esi,hd_timeout_str |
2611 | call sys_msg_board_str |
2612 | call sys_msg_board_str |
2612 | ; jmp $ |
2613 | ; jmp $ |
2613 | mov [hd_error],1 |
2614 | mov [hd_error],1 |
2614 | pop eax |
2615 | pop eax |
2615 | ret |
2616 | ret |
2616 | 2617 | ||
2617 | hd_read_error: |
2618 | hd_read_error: |
2618 | 2619 | ||
2619 | call clear_hd_cache |
2620 | call clear_hd_cache |
2620 | call clear_application_table_status |
2621 | call clear_application_table_status |
2621 | mov esi,hd_read_str |
2622 | mov esi,hd_read_str |
2622 | call sys_msg_board_str |
2623 | call sys_msg_board_str |
2623 | pop edx eax |
2624 | pop edx eax |
2624 | jmp return_01 |
2625 | jmp return_01 |
2625 | ; jmp $ |
2626 | ; jmp $ |
2626 | 2627 | ||
2627 | hd_write_error: |
2628 | hd_write_error: |
2628 | 2629 | ||
2629 | call clear_hd_cache |
2630 | call clear_hd_cache |
2630 | call clear_application_table_status |
2631 | call clear_application_table_status |
2631 | mov esi,hd_write_str |
2632 | mov esi,hd_write_str |
2632 | call sys_msg_board_str |
2633 | call sys_msg_board_str |
2633 | jmp return_02 |
2634 | jmp return_02 |
2634 | ; jmp $ |
2635 | ; jmp $ |
2635 | 2636 | ||
2636 | hd_lba_error: |
2637 | hd_lba_error: |
2637 | call clear_hd_cache |
2638 | call clear_hd_cache |
2638 | call clear_application_table_status |
2639 | call clear_application_table_status |
2639 | mov esi,hd_lba_str |
2640 | mov esi,hd_lba_str |
2640 | call sys_msg_board_str |
2641 | call sys_msg_board_str |
2641 | jmp LBA_read_ret |
2642 | jmp LBA_read_ret |
2642 | 2643 | ||
2643 | 2644 | ||
2644 | wait_for_hd_idle: |
2645 | wait_for_hd_idle: |
2645 | 2646 | ||
2646 | push eax edx |
2647 | push eax edx |
2647 | 2648 | ||
2648 | call save_hd_wait_timeout |
2649 | call save_hd_wait_timeout |
2649 | 2650 | ||
2650 | mov edx,[hdbase] |
2651 | mov edx,[hdbase] |
2651 | add edx,0x7 |
2652 | add edx,0x7 |
2652 | 2653 | ||
2653 | wfhil1: |
2654 | wfhil1: |
2654 | 2655 | ||
2655 | call check_hd_wait_timeout |
2656 | call check_hd_wait_timeout |
2656 | cmp [hd_error],0 |
2657 | cmp [hd_error],0 |
2657 | jne @f |
2658 | jne @f |
2658 | 2659 | ||
2659 | in al,dx |
2660 | in al,dx |
2660 | test al,128 |
2661 | test al,128 |
2661 | jnz wfhil1 |
2662 | jnz wfhil1 |
2662 | 2663 | ||
2663 | @@: |
2664 | @@: |
2664 | 2665 | ||
2665 | pop edx eax |
2666 | pop edx eax |
2666 | ret |
2667 | ret |
2667 | 2668 | ||
2668 | 2669 | ||
2669 | 2670 | ||
2670 | wait_for_sector_buffer: |
2671 | wait_for_sector_buffer: |
2671 | 2672 | ||
2672 | push eax edx |
2673 | push eax edx |
2673 | 2674 | ||
2674 | mov edx,[hdbase] |
2675 | mov edx,[hdbase] |
2675 | add edx,0x7 |
2676 | add edx,0x7 |
2676 | 2677 | ||
2677 | call save_hd_wait_timeout |
2678 | call save_hd_wait_timeout |
2678 | 2679 | ||
2679 | hdwait_sbuf: ; wait for sector buffer to be ready |
2680 | hdwait_sbuf: ; wait for sector buffer to be ready |
2680 | 2681 | ||
2681 | call check_hd_wait_timeout |
2682 | call check_hd_wait_timeout |
2682 | cmp [hd_error],0 |
2683 | cmp [hd_error],0 |
2683 | jne @f |
2684 | jne @f |
2684 | 2685 | ||
2685 | in al,dx |
2686 | in al,dx |
2686 | test al,8 |
2687 | test al,8 |
2687 | jz hdwait_sbuf |
2688 | jz hdwait_sbuf |
2688 | 2689 | ||
2689 | mov [hd_error],0 |
2690 | mov [hd_error],0 |
2690 | 2691 | ||
2691 | cmp [hd_setup],1 ; do not mark error for setup request |
2692 | cmp [hd_setup],1 ; do not mark error for setup request |
2692 | je buf_wait_ok |
2693 | je buf_wait_ok |
2693 | 2694 | ||
2694 | test al,1 ; previous command ended up with an error |
2695 | test al,1 ; previous command ended up with an error |
2695 | jz buf_wait_ok |
2696 | jz buf_wait_ok |
2696 | @@: |
2697 | @@: |
2697 | mov [hd_error],1 |
2698 | mov [hd_error],1 |
2698 | 2699 | ||
2699 | buf_wait_ok: |
2700 | buf_wait_ok: |
2700 | 2701 | ||
2701 | pop edx eax |
2702 | pop edx eax |
2702 | ret |
2703 | ret |
2703 | 2704 | ||
2704 | 2705 | ||
2705 | 2706 | ||
2706 | read_hd_file: |
2707 | read_hd_file: |
2707 | ;----------------------------------------------------------------- |
2708 | ;----------------------------------------------------------------- |
2708 | ; |
2709 | ; |
2709 | ; Converting old reading function for hd-application start. |
2710 | ; Converting old reading function for hd-application start. |
2710 | ; |
2711 | ; |
2711 | ; IN: |
2712 | ; IN: |
2712 | ; |
2713 | ; |
2713 | ; eax - pointer to file (0 = read only first sector of drive: eg 'label') |
2714 | ; eax - pointer to file (0 = read only first sector of drive: eg 'label') |
2714 | ; ebx - file lenght |
2715 | ; ebx - file lenght |
2715 | ; ecx - start 512 byte block number |
2716 | ; ecx - start 512 byte block number |
2716 | ; edx - number of blocks to read |
2717 | ; edx - number of blocks to read |
2717 | ; esi - pointer to return/work area (atleast 20 000 bytes) |
2718 | ; esi - pointer to return/work area (atleast 20 000 bytes) |
2718 | ; |
2719 | ; |
2719 | ; For new read function |
2720 | ; For new read function |
2720 | ; |
2721 | ; |
2721 | ; EAX (PAR0) pointer to file-name |
2722 | ; EAX (PAR0) pointer to file-name |
2722 | ; ECX (PAR1) pointer to buffer |
2723 | ; ECX (PAR1) pointer to buffer |
2723 | ; EBX (PAR2) vt file blocks to read |
2724 | ; EBX (PAR2) vt file blocks to read |
2724 | ; EDX (PAR3) pointer to path |
2725 | ; EDX (PAR3) pointer to path |
2725 | ; ESI vt first 512 block to read |
2726 | ; ESI vt first 512 block to read |
2726 | ; EDI if 0 - return root |
2727 | ; EDI if 0 - return root |
2727 | ;-------------------------------------------------------------------------- |
2728 | ;-------------------------------------------------------------------------- |
2728 | 2729 | ||
2729 | push ecx esi edi |
2730 | push ecx esi edi |
2730 | mov esi,eax |
2731 | mov esi,eax |
2731 | mov edi,startpath |
2732 | mov edi,startpath |
2732 | mov ecx,250 |
2733 | mov ecx,250 |
2733 | cld |
2734 | cld |
2734 | rep movsb |
2735 | rep movsb |
2735 | pop edi esi ecx |
2736 | pop edi esi ecx |
2736 | 2737 | ||
2737 | mov eax,startpath |
2738 | mov eax,startpath |
2738 | mov [eax+ebx-12],byte 0 |
2739 | mov [eax+ebx-12],byte 0 |
2739 | 2740 | ||
2740 | push eax ebx ecx edx esi |
2741 | push eax ebx ecx edx esi |
2741 | 2742 | ||
2742 | pop ecx ; pointer to buffer |
2743 | pop ecx ; pointer to buffer |
2743 | add ecx,1024 |
2744 | add ecx,1024 |
2744 | pop ebx ; number of blocks to read |
2745 | pop ebx ; number of blocks to read |
2745 | pop esi ; first block to read |
2746 | pop esi ; first block to read |
2746 | dec esi |
2747 | dec esi |
2747 | pop eax ; file length |
2748 | pop eax ; file length |
2748 | pop edx ; pointer to path |
2749 | pop edx ; pointer to path |
2749 | 2750 | ||
2750 | mov edi,12 |
2751 | mov edi,12 |
2751 | lea eax,[eax+edx-12+1] |
2752 | lea eax,[eax+edx-12+1] |
2752 | call file_read |
2753 | call file_read |
2753 | 2754 | ||
2754 | ret |
2755 | ret |
2755 | 2756 | ||
2756 | ; \begin{diamond} |
2757 | ; \begin{diamond} |
2757 | hd_find_lfn: |
2758 | hd_find_lfn: |
2758 | ; in: esi->name |
2759 | ; in: esi->name |
2759 | ; out: CF=1 - file not found |
2760 | ; out: CF=1 - file not found |
2760 | ; else CF=0 and edi->direntry, eax=sector |
2761 | ; else CF=0 and edi->direntry, eax=sector |
2761 | ; destroys eax |
2762 | ; destroys eax |
2762 | push esi edi |
2763 | push esi edi |
2763 | push 0 |
2764 | push 0 |
2764 | push 0 |
2765 | push 0 |
2765 | push fat16_root_first |
2766 | push fat16_root_first |
2766 | push fat16_root_next |
2767 | push fat16_root_next |
2767 | mov eax, [ROOT_CLUSTER] |
2768 | mov eax, [ROOT_CLUSTER] |
2768 | cmp [fat_type], 32 |
2769 | cmp [fat_type], 32 |
2769 | jz .fat32 |
2770 | jz .fat32 |
2770 | .loop: |
2771 | .loop: |
2771 | call fat_find_lfn |
2772 | call fat_find_lfn |
2772 | jc .notfound |
2773 | jc .notfound |
2773 | cmp byte [esi], 0 |
2774 | cmp byte [esi], 0 |
2774 | jz .found |
2775 | jz .found |
2775 | test byte [edi+11], 10h |
2776 | test byte [edi+11], 10h |
2776 | jz .notfound |
2777 | jz .notfound |
2777 | and dword [esp+12], 0 |
2778 | and dword [esp+12], 0 |
2778 | mov eax, [edi+20-2] |
2779 | mov eax, [edi+20-2] |
2779 | mov ax, [edi+26] ; cluster |
2780 | mov ax, [edi+26] ; cluster |
2780 | .fat32: |
2781 | .fat32: |
2781 | mov [esp+8], eax |
2782 | mov [esp+8], eax |
2782 | mov dword [esp+4], fat_notroot_first |
2783 | mov dword [esp+4], fat_notroot_first |
2783 | mov dword [esp], fat_notroot_next |
2784 | mov dword [esp], fat_notroot_next |
2784 | jmp .loop |
2785 | jmp .loop |
2785 | .notfound: |
2786 | .notfound: |
2786 | add esp, 16 |
2787 | add esp, 16 |
2787 | pop edi esi |
2788 | pop edi esi |
2788 | stc |
2789 | stc |
2789 | ret |
2790 | ret |
2790 | .found: |
2791 | .found: |
2791 | lea eax, [esp+8] |
2792 | lea eax, [esp+8] |
2792 | cmp dword [eax], 0 |
2793 | cmp dword [eax], 0 |
2793 | jz .root |
2794 | jz .root |
2794 | call fat_get_sector |
2795 | call fat_get_sector |
2795 | jmp .cmn |
2796 | jmp .cmn |
2796 | .root: |
2797 | .root: |
2797 | mov eax, [eax+4] |
2798 | mov eax, [eax+4] |
2798 | add eax, [ROOT_START] |
2799 | add eax, [ROOT_START] |
2799 | .cmn: |
2800 | .cmn: |
2800 | add esp, 20 ; CF=0 |
2801 | add esp, 20 ; CF=0 |
2801 | pop esi |
2802 | pop esi |
2802 | ret |
2803 | ret |
2803 | 2804 | ||
2804 | ;---------------------------------------------------------------- |
2805 | ;---------------------------------------------------------------- |
2805 | ; |
2806 | ; |
2806 | ; fs_HdRead - LFN variant for reading hard disk |
2807 | ; fs_HdRead - LFN variant for reading hard disk |
2807 | ; |
2808 | ; |
2808 | ; esi points to filename |
2809 | ; esi points to filename |
2809 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
2810 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
2810 | ; may be ebx=0 - start from first byte |
2811 | ; may be ebx=0 - start from first byte |
2811 | ; ecx number of bytes to read, 0+ |
2812 | ; ecx number of bytes to read, 0+ |
2812 | ; edx mem location to return data |
2813 | ; edx mem location to return data |
2813 | ; |
2814 | ; |
2814 | ; ret ebx = bytes read or 0xffffffff file not found |
2815 | ; ret ebx = bytes read or 0xffffffff file not found |
2815 | ; eax = 0 ok read or other = errormsg |
2816 | ; eax = 0 ok read or other = errormsg |
2816 | ; |
2817 | ; |
2817 | ;-------------------------------------------------------------- |
2818 | ;-------------------------------------------------------------- |
2818 | fs_HdRead: |
2819 | fs_HdRead: |
2819 | cmp [fat_type], 0 |
2820 | cmp [fat_type], 0 |
2820 | jnz @f |
2821 | jnz @f |
2821 | or ebx, -1 |
2822 | or ebx, -1 |
2822 | mov eax, ERROR_UNKNOWN_FS |
2823 | mov eax, ERROR_UNKNOWN_FS |
2823 | ret |
2824 | ret |
2824 | @@: |
2825 | @@: |
2825 | push edi |
2826 | push edi |
2826 | cmp byte [esi], 0 |
2827 | cmp byte [esi], 0 |
2827 | jnz @f |
2828 | jnz @f |
2828 | .noaccess: |
2829 | .noaccess: |
2829 | pop edi |
2830 | pop edi |
2830 | .noaccess_2: |
2831 | .noaccess_2: |
2831 | or ebx, -1 |
2832 | or ebx, -1 |
2832 | mov eax, ERROR_ACCESS_DENIED |
2833 | mov eax, ERROR_ACCESS_DENIED |
2833 | ret |
2834 | ret |
2834 | 2835 | ||
2835 | .noaccess_3: |
2836 | .noaccess_3: |
2836 | add esp,4 |
2837 | add esp,4 |
2837 | .noaccess_1: |
2838 | .noaccess_1: |
2838 | add esp,4 |
2839 | add esp,4 |
2839 | .noaccess_4: |
2840 | .noaccess_4: |
2840 | add esp,4*5 |
2841 | add esp,4*5 |
2841 | jmp .noaccess_2 |
2842 | jmp .noaccess_2 |
2842 | 2843 | ||
2843 | @@: |
2844 | @@: |
2844 | call hd_find_lfn |
2845 | call hd_find_lfn |
2845 | jnc .found |
2846 | jnc .found |
2846 | pop edi |
2847 | pop edi |
2847 | cmp [hd_error],0 |
2848 | cmp [hd_error],0 |
2848 | jne .noaccess_2 |
2849 | jne .noaccess_2 |
2849 | or ebx, -1 |
2850 | or ebx, -1 |
2850 | mov eax, ERROR_FILE_NOT_FOUND |
2851 | mov eax, ERROR_FILE_NOT_FOUND |
2851 | ret |
2852 | ret |
2852 | 2853 | ||
2853 | .found: |
2854 | .found: |
2854 | test byte [edi+11], 0x10 ; do not allow read directories |
2855 | test byte [edi+11], 0x10 ; do not allow read directories |
2855 | jnz .noaccess |
2856 | jnz .noaccess |
2856 | test ebx, ebx |
2857 | test ebx, ebx |
2857 | jz .l1 |
2858 | jz .l1 |
2858 | cmp dword [ebx+4], 0 |
2859 | cmp dword [ebx+4], 0 |
2859 | jz @f |
2860 | jz @f |
2860 | xor ebx, ebx |
2861 | xor ebx, ebx |
2861 | .reteof: |
2862 | .reteof: |
2862 | mov eax, 6 |
2863 | mov eax, 6 |
2863 | pop edi |
2864 | pop edi |
2864 | ret |
2865 | ret |
2865 | @@: |
2866 | @@: |
2866 | mov ebx, [ebx] |
2867 | mov ebx, [ebx] |
2867 | .l1: |
2868 | .l1: |
2868 | push ecx edx |
2869 | push ecx edx |
2869 | push 0 |
2870 | push 0 |
2870 | mov eax, [edi+28] |
2871 | mov eax, [edi+28] |
2871 | sub eax, ebx |
2872 | sub eax, ebx |
2872 | jb .eof |
2873 | jb .eof |
2873 | cmp eax, ecx |
2874 | cmp eax, ecx |
2874 | jae @f |
2875 | jae @f |
2875 | mov ecx, eax |
2876 | mov ecx, eax |
2876 | mov byte [esp], 6 |
2877 | mov byte [esp], 6 |
2877 | @@: |
2878 | @@: |
2878 | mov eax, [edi+20-2] |
2879 | mov eax, [edi+20-2] |
2879 | mov ax, [edi+26] |
2880 | mov ax, [edi+26] |
2880 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
2881 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
2881 | .new_cluster: |
2882 | .new_cluster: |
2882 | jecxz .new_sector |
2883 | jecxz .new_sector |
2883 | test eax, eax |
2884 | test eax, eax |
2884 | jz .eof |
2885 | jz .eof |
2885 | cmp eax, [fatRESERVED] |
2886 | cmp eax, [fatRESERVED] |
2886 | jae .eof |
2887 | jae .eof |
2887 | mov [cluster_tmp], eax |
2888 | mov [cluster_tmp], eax |
2888 | dec eax |
2889 | dec eax |
2889 | dec eax |
2890 | dec eax |
2890 | mov edi, [SECTORS_PER_CLUSTER] |
2891 | mov edi, [SECTORS_PER_CLUSTER] |
2891 | imul eax, edi |
2892 | imul eax, edi |
2892 | add eax, [DATA_START] |
2893 | add eax, [DATA_START] |
2893 | .new_sector: |
2894 | .new_sector: |
2894 | test ecx, ecx |
2895 | test ecx, ecx |
2895 | jz .done |
2896 | jz .done |
2896 | sub ebx, 512 |
2897 | sub ebx, 512 |
2897 | jae .skip |
2898 | jae .skip |
2898 | add ebx, 512 |
2899 | add ebx, 512 |
2899 | jnz .force_buf |
2900 | jnz .force_buf |
2900 | cmp ecx, 512 |
2901 | cmp ecx, 512 |
2901 | jb .force_buf |
2902 | jb .force_buf |
2902 | ; we may read directly to given buffer |
2903 | ; we may read directly to given buffer |
2903 | push ebx |
2904 | push ebx |
2904 | mov ebx, edx |
2905 | mov ebx, edx |
2905 | call hd_read |
2906 | call hd_read |
2906 | cmp [hd_error],0 |
2907 | cmp [hd_error],0 |
2907 | jne .noaccess_1 |
2908 | jne .noaccess_1 |
2908 | pop ebx |
2909 | pop ebx |
2909 | add edx, 512 |
2910 | add edx, 512 |
2910 | sub ecx, 512 |
2911 | sub ecx, 512 |
2911 | jmp .skip |
2912 | jmp .skip |
2912 | .force_buf: |
2913 | .force_buf: |
2913 | ; we must read sector to temporary buffer and then copy it to destination |
2914 | ; we must read sector to temporary buffer and then copy it to destination |
2914 | push eax ebx |
2915 | push eax ebx |
2915 | mov ebx, buffer |
2916 | mov ebx, buffer |
2916 | call hd_read |
2917 | call hd_read |
2917 | cmp [hd_error],0 |
2918 | cmp [hd_error],0 |
2918 | jne .noaccess_3 |
2919 | jne .noaccess_3 |
2919 | 2920 | ||
2920 | mov eax, ebx |
2921 | mov eax, ebx |
2921 | pop ebx |
2922 | pop ebx |
2922 | add eax, ebx |
2923 | add eax, ebx |
2923 | push ecx |
2924 | push ecx |
2924 | add ecx, ebx |
2925 | add ecx, ebx |
2925 | cmp ecx, 512 |
2926 | cmp ecx, 512 |
2926 | jbe @f |
2927 | jbe @f |
2927 | mov ecx, 512 |
2928 | mov ecx, 512 |
2928 | @@: |
2929 | @@: |
2929 | sub ecx, ebx |
2930 | sub ecx, ebx |
2930 | mov ebx, edx |
2931 | mov ebx, edx |
2931 | call memmove |
2932 | call memmove |
2932 | add edx, ecx |
2933 | add edx, ecx |
2933 | sub [esp], ecx |
2934 | sub [esp], ecx |
2934 | pop ecx |
2935 | pop ecx |
2935 | pop eax |
2936 | pop eax |
2936 | xor ebx, ebx |
2937 | xor ebx, ebx |
2937 | .skip: |
2938 | .skip: |
2938 | inc eax |
2939 | inc eax |
2939 | dec edi |
2940 | dec edi |
2940 | jnz .new_sector |
2941 | jnz .new_sector |
2941 | mov eax, [cluster_tmp] |
2942 | mov eax, [cluster_tmp] |
2942 | call get_FAT |
2943 | call get_FAT |
2943 | cmp [hd_error],0 |
2944 | cmp [hd_error],0 |
2944 | jne .noaccess_4 |
2945 | jne .noaccess_4 |
2945 | 2946 | ||
2946 | jmp .new_cluster |
2947 | jmp .new_cluster |
2947 | .done: |
2948 | .done: |
2948 | mov ebx, edx |
2949 | mov ebx, edx |
2949 | pop eax edx ecx edi |
2950 | pop eax edx ecx edi |
2950 | sub ebx, edx |
2951 | sub ebx, edx |
2951 | ret |
2952 | ret |
2952 | .eof: |
2953 | .eof: |
2953 | mov ebx, edx |
2954 | mov ebx, edx |
2954 | pop eax edx ecx |
2955 | pop eax edx ecx |
2955 | sub ebx, edx |
2956 | sub ebx, edx |
2956 | jmp .reteof |
2957 | jmp .reteof |
2957 | 2958 | ||
2958 | ;---------------------------------------------------------------- |
2959 | ;---------------------------------------------------------------- |
2959 | ; |
2960 | ; |
2960 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
2961 | ; fs_HdReadFolder - LFN variant for reading hard disk folder |
2961 | ; |
2962 | ; |
2962 | ; esi points to filename |
2963 | ; esi points to filename |
2963 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
2964 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
2964 | ; & flags (bitfields) |
2965 | ; & flags (bitfields) |
2965 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
2966 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
2966 | ; ecx number of blocks to read, 0+ |
2967 | ; ecx number of blocks to read, 0+ |
2967 | ; edx mem location to return data |
2968 | ; edx mem location to return data |
2968 | ; |
2969 | ; |
2969 | ; ret ebx = blocks read or 0xffffffff folder not found |
2970 | ; ret ebx = blocks read or 0xffffffff folder not found |
2970 | ; eax = 0 ok read or other = errormsg |
2971 | ; eax = 0 ok read or other = errormsg |
2971 | ; |
2972 | ; |
2972 | ;-------------------------------------------------------------- |
2973 | ;-------------------------------------------------------------- |
2973 | fs_HdReadFolder: |
2974 | fs_HdReadFolder: |
2974 | mov eax, [ROOT_CLUSTER] |
2975 | mov eax, [ROOT_CLUSTER] |
2975 | push edi |
2976 | push edi |
2976 | cmp byte [esi], 0 |
2977 | cmp byte [esi], 0 |
2977 | jz .doit |
2978 | jz .doit |
2978 | call hd_find_lfn |
2979 | call hd_find_lfn |
2979 | jnc .found |
2980 | jnc .found |
2980 | pop edi |
2981 | pop edi |
2981 | or ebx, -1 |
2982 | or ebx, -1 |
2982 | mov eax, ERROR_FILE_NOT_FOUND |
2983 | mov eax, ERROR_FILE_NOT_FOUND |
2983 | ret |
2984 | ret |
2984 | .found: |
2985 | .found: |
2985 | test byte [edi+11], 0x10 ; do not allow read files |
2986 | test byte [edi+11], 0x10 ; do not allow read files |
2986 | jnz .found_dir |
2987 | jnz .found_dir |
2987 | pop edi |
2988 | pop edi |
2988 | or ebx, -1 |
2989 | or ebx, -1 |
2989 | mov eax, ERROR_ACCESS_DENIED |
2990 | mov eax, ERROR_ACCESS_DENIED |
2990 | ret |
2991 | ret |
2991 | .found_dir: |
2992 | .found_dir: |
2992 | mov eax, [edi+20-2] |
2993 | mov eax, [edi+20-2] |
2993 | mov ax, [edi+26] ; eax=cluster |
2994 | mov ax, [edi+26] ; eax=cluster |
2994 | .doit: |
2995 | .doit: |
2995 | push esi ecx |
2996 | push esi ecx |
2996 | push ebp |
2997 | push ebp |
2997 | sub esp, 262*2 ; reserve space for LFN |
2998 | sub esp, 262*2 ; reserve space for LFN |
2998 | mov ebp, esp |
2999 | mov ebp, esp |
2999 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
3000 | push dword [ebx+4] ; for fat_get_name: read ANSI/UNICODE name |
3000 | mov ebx, [ebx] |
3001 | mov ebx, [ebx] |
3001 | ; init header |
3002 | ; init header |
3002 | push eax ecx |
3003 | push eax ecx |
3003 | mov edi, edx |
3004 | mov edi, edx |
3004 | mov ecx, 32/4 |
3005 | mov ecx, 32/4 |
3005 | xor eax, eax |
3006 | xor eax, eax |
3006 | rep stosd |
3007 | rep stosd |
3007 | pop ecx eax |
3008 | pop ecx eax |
3008 | mov byte [edx], 1 ; version |
3009 | mov byte [edx], 1 ; version |
3009 | mov esi, edi ; esi points to BDFE |
3010 | mov esi, edi ; esi points to BDFE |
3010 | .new_cluster: |
3011 | .new_cluster: |
3011 | mov [cluster_tmp], eax |
3012 | mov [cluster_tmp], eax |
3012 | test eax, eax |
3013 | test eax, eax |
3013 | jnz @f |
3014 | jnz @f |
3014 | cmp [fat_type], 32 |
3015 | cmp [fat_type], 32 |
3015 | jz .notfound |
3016 | jz .notfound |
3016 | mov eax, [ROOT_START] |
3017 | mov eax, [ROOT_START] |
3017 | push [ROOT_SECTORS] |
3018 | push [ROOT_SECTORS] |
3018 | push ebx |
3019 | push ebx |
3019 | jmp .new_sector |
3020 | jmp .new_sector |
3020 | @@: |
3021 | @@: |
3021 | dec eax |
3022 | dec eax |
3022 | dec eax |
3023 | dec eax |
3023 | imul eax, [SECTORS_PER_CLUSTER] |
3024 | imul eax, [SECTORS_PER_CLUSTER] |
3024 | push [SECTORS_PER_CLUSTER] |
3025 | push [SECTORS_PER_CLUSTER] |
3025 | add eax, [DATA_START] |
3026 | add eax, [DATA_START] |
3026 | push ebx |
3027 | push ebx |
3027 | .new_sector: |
3028 | .new_sector: |
3028 | mov ebx, buffer |
3029 | mov ebx, buffer |
3029 | mov edi, ebx |
3030 | mov edi, ebx |
3030 | call hd_read |
3031 | call hd_read |
3031 | cmp [hd_error], 0 |
3032 | cmp [hd_error], 0 |
3032 | jnz .notfound2 |
3033 | jnz .notfound2 |
3033 | add ebx, 512 |
3034 | add ebx, 512 |
3034 | push eax |
3035 | push eax |
3035 | .l1: |
3036 | .l1: |
3036 | call fat_get_name |
3037 | call fat_get_name |
3037 | jc .l2 |
3038 | jc .l2 |
3038 | cmp byte [edi+11], 0xF |
3039 | cmp byte [edi+11], 0xF |
3039 | jnz .do_bdfe |
3040 | jnz .do_bdfe |
3040 | add edi, 0x20 |
3041 | add edi, 0x20 |
3041 | cmp edi, ebx |
3042 | cmp edi, ebx |
3042 | jb .do_bdfe |
3043 | jb .do_bdfe |
3043 | pop eax |
3044 | pop eax |
3044 | inc eax |
3045 | inc eax |
3045 | dec dword [esp+4] |
3046 | dec dword [esp+4] |
3046 | jnz @f |
3047 | jnz @f |
3047 | mov eax, [cluster_tmp] |
3048 | mov eax, [cluster_tmp] |
3048 | test eax, eax |
3049 | test eax, eax |
3049 | jz .done |
3050 | jz .done |
3050 | call get_FAT |
3051 | call get_FAT |
3051 | cmp [hd_error], 0 |
3052 | cmp [hd_error], 0 |
3052 | jnz .notfound2 |
3053 | jnz .notfound2 |
3053 | cmp eax, 2 |
3054 | cmp eax, 2 |
3054 | jb .done |
3055 | jb .done |
3055 | cmp eax, [fatRESERVED] |
3056 | cmp eax, [fatRESERVED] |
3056 | jae .done |
3057 | jae .done |
3057 | push eax |
3058 | push eax |
3058 | mov eax, [SECTORS_PER_CLUSTER] |
3059 | mov eax, [SECTORS_PER_CLUSTER] |
3059 | mov [esp+8], eax |
3060 | mov [esp+8], eax |
3060 | pop eax |
3061 | pop eax |
3061 | mov [cluster_tmp], eax |
3062 | mov [cluster_tmp], eax |
3062 | dec eax |
3063 | dec eax |
3063 | dec eax |
3064 | dec eax |
3064 | imul eax, [SECTORS_PER_CLUSTER] |
3065 | imul eax, [SECTORS_PER_CLUSTER] |
3065 | add eax, [DATA_START] |
3066 | add eax, [DATA_START] |
3066 | @@: |
3067 | @@: |
3067 | mov ebx, buffer |
3068 | mov ebx, buffer |
3068 | mov edi, ebx |
3069 | mov edi, ebx |
3069 | call hd_read |
3070 | call hd_read |
3070 | cmp [hd_error], 0 |
3071 | cmp [hd_error], 0 |
3071 | jnz .notfound2 |
3072 | jnz .notfound2 |
3072 | add ebx, 512 |
3073 | add ebx, 512 |
3073 | push eax |
3074 | push eax |
3074 | .do_bdfe: |
3075 | .do_bdfe: |
3075 | inc dword [edx+8] ; new file found |
3076 | inc dword [edx+8] ; new file found |
3076 | dec dword [esp+4] |
3077 | dec dword [esp+4] |
3077 | jns .l2 |
3078 | jns .l2 |
3078 | dec ecx |
3079 | dec ecx |
3079 | js .l2 |
3080 | js .l2 |
3080 | inc dword [edx+4] ; new file block copied |
3081 | inc dword [edx+4] ; new file block copied |
3081 | call fat_entry_to_bdfe |
3082 | call fat_entry_to_bdfe |
3082 | .l2: |
3083 | .l2: |
3083 | add edi, 0x20 |
3084 | add edi, 0x20 |
3084 | cmp edi, ebx |
3085 | cmp edi, ebx |
3085 | jb .l1 |
3086 | jb .l1 |
3086 | pop eax |
3087 | pop eax |
3087 | inc eax |
3088 | inc eax |
3088 | dec dword [esp+4] |
3089 | dec dword [esp+4] |
3089 | jnz .new_sector |
3090 | jnz .new_sector |
3090 | mov eax, [cluster_tmp] |
3091 | mov eax, [cluster_tmp] |
3091 | test eax, eax |
3092 | test eax, eax |
3092 | jz .done |
3093 | jz .done |
3093 | call get_FAT |
3094 | call get_FAT |
3094 | cmp [hd_error], 0 |
3095 | cmp [hd_error], 0 |
3095 | jnz .notfound2 |
3096 | jnz .notfound2 |
3096 | cmp eax, 2 |
3097 | cmp eax, 2 |
3097 | jb .done |
3098 | jb .done |
3098 | cmp eax, [fatRESERVED] |
3099 | cmp eax, [fatRESERVED] |
3099 | jae .done |
3100 | jae .done |
3100 | push eax |
3101 | push eax |
3101 | mov eax, [SECTORS_PER_CLUSTER] |
3102 | mov eax, [SECTORS_PER_CLUSTER] |
3102 | mov [esp+8], eax |
3103 | mov [esp+8], eax |
3103 | pop eax |
3104 | pop eax |
3104 | pop ebx |
3105 | pop ebx |
3105 | add esp, 4 |
3106 | add esp, 4 |
3106 | jmp .new_cluster |
3107 | jmp .new_cluster |
3107 | .notfound2: |
3108 | .notfound2: |
3108 | add esp, 8 |
3109 | add esp, 8 |
3109 | .notfound: |
3110 | .notfound: |
3110 | add esp, 262*2+4 |
3111 | add esp, 262*2+4 |
3111 | pop ebp ecx esi edi |
3112 | pop ebp ecx esi edi |
3112 | mov eax, ERROR_FILE_NOT_FOUND |
3113 | mov eax, ERROR_FILE_NOT_FOUND |
3113 | or ebx, -1 |
3114 | or ebx, -1 |
3114 | ret |
3115 | ret |
3115 | .done: |
3116 | .done: |
3116 | add esp, 262*2+4+8 |
3117 | add esp, 262*2+4+8 |
3117 | pop ebp |
3118 | pop ebp |
3118 | mov ebx, [edx+4] |
3119 | mov ebx, [edx+4] |
3119 | xor eax, eax |
3120 | xor eax, eax |
3120 | dec ecx |
3121 | dec ecx |
3121 | js @f |
3122 | js @f |
3122 | mov al, ERROR_END_OF_FILE |
3123 | mov al, ERROR_END_OF_FILE |
3123 | @@: |
3124 | @@: |
3124 | pop ecx esi edi |
3125 | pop ecx esi edi |
3125 | ret |
3126 | ret |
3126 | 3127 | ||
3127 | fat16_root_next: |
3128 | fat16_root_next: |
3128 | cmp edi, buffer+0x200-0x20 |
3129 | cmp edi, buffer+0x200-0x20 |
3129 | jae fat16_root_next_sector |
3130 | jae fat16_root_next_sector |
3130 | add edi, 0x20 |
3131 | add edi, 0x20 |
3131 | ret ; CF=0 |
3132 | ret ; CF=0 |
3132 | fat16_root_next_sector: |
3133 | fat16_root_next_sector: |
3133 | ; read next sector |
3134 | ; read next sector |
3134 | push ecx |
3135 | push ecx |
3135 | mov ecx, [eax+4] |
3136 | mov ecx, [eax+4] |
3136 | inc ecx |
3137 | inc ecx |
3137 | mov [eax+4], ecx |
3138 | mov [eax+4], ecx |
3138 | cmp ecx, [ROOT_SECTORS] |
3139 | cmp ecx, [ROOT_SECTORS] |
3139 | pop ecx |
3140 | pop ecx |
3140 | jae fat16_root_first.readerr |
3141 | jae fat16_root_first.readerr |
3141 | fat16_root_first: |
3142 | fat16_root_first: |
3142 | mov eax, [eax+4] |
3143 | mov eax, [eax+4] |
3143 | add eax, [ROOT_START] |
3144 | add eax, [ROOT_START] |
3144 | push ebx |
3145 | push ebx |
3145 | mov edi, buffer |
3146 | mov edi, buffer |
3146 | mov ebx, edi |
3147 | mov ebx, edi |
3147 | call hd_read |
3148 | call hd_read |
3148 | pop ebx |
3149 | pop ebx |
3149 | cmp [hd_error], 0 |
3150 | cmp [hd_error], 0 |
3150 | jnz .readerr |
3151 | jnz .readerr |
3151 | ret ; CF=0 |
3152 | ret ; CF=0 |
3152 | .readerr: |
3153 | .readerr: |
3153 | stc |
3154 | stc |
3154 | ret |
3155 | ret |
3155 | fat16_root_begin_write: |
3156 | fat16_root_begin_write: |
3156 | push edi eax |
3157 | push edi eax |
3157 | call fat16_root_first |
3158 | call fat16_root_first |
3158 | pop eax edi |
3159 | pop eax edi |
3159 | ret |
3160 | ret |
3160 | fat16_root_end_write: |
3161 | fat16_root_end_write: |
3161 | pusha |
3162 | pusha |
3162 | mov eax, [eax+4] |
3163 | mov eax, [eax+4] |
3163 | add eax, [ROOT_START] |
3164 | add eax, [ROOT_START] |
3164 | mov ebx, buffer |
3165 | mov ebx, buffer |
3165 | call hd_write |
3166 | call hd_write |
3166 | popa |
3167 | popa |
3167 | ret |
3168 | ret |
3168 | fat16_root_next_write: |
3169 | fat16_root_next_write: |
3169 | cmp edi, buffer+0x200 |
3170 | cmp edi, buffer+0x200 |
3170 | jae @f |
3171 | jae @f |
3171 | ret |
3172 | ret |
3172 | @@: |
3173 | @@: |
3173 | call fat16_root_end_write |
3174 | call fat16_root_end_write |
3174 | jmp fat16_root_next_sector |
3175 | jmp fat16_root_next_sector |
3175 | fat16_root_extend_dir: |
3176 | fat16_root_extend_dir: |
3176 | stc |
3177 | stc |
3177 | ret |
3178 | ret |
3178 | 3179 | ||
3179 | fat_notroot_next: |
3180 | fat_notroot_next: |
3180 | cmp edi, buffer+0x200-0x20 |
3181 | cmp edi, buffer+0x200-0x20 |
3181 | jae fat_notroot_next_sector |
3182 | jae fat_notroot_next_sector |
3182 | add edi, 0x20 |
3183 | add edi, 0x20 |
3183 | ret ; CF=0 |
3184 | ret ; CF=0 |
3184 | fat_notroot_next_sector: |
3185 | fat_notroot_next_sector: |
3185 | push ecx |
3186 | push ecx |
3186 | mov ecx, [eax+4] |
3187 | mov ecx, [eax+4] |
3187 | inc ecx |
3188 | inc ecx |
3188 | cmp ecx, [SECTORS_PER_CLUSTER] |
3189 | cmp ecx, [SECTORS_PER_CLUSTER] |
3189 | jae fat_notroot_next_cluster |
3190 | jae fat_notroot_next_cluster |
3190 | mov [eax+4], ecx |
3191 | mov [eax+4], ecx |
3191 | jmp @f |
3192 | jmp @f |
3192 | fat_notroot_next_cluster: |
3193 | fat_notroot_next_cluster: |
3193 | push eax |
3194 | push eax |
3194 | mov eax, [eax] |
3195 | mov eax, [eax] |
3195 | call get_FAT |
3196 | call get_FAT |
3196 | mov ecx, eax |
3197 | mov ecx, eax |
3197 | pop eax |
3198 | pop eax |
3198 | cmp [hd_error], 0 |
3199 | cmp [hd_error], 0 |
3199 | jnz fat_notroot_next_err |
3200 | jnz fat_notroot_next_err |
3200 | cmp ecx, [fatRESERVED] |
3201 | cmp ecx, [fatRESERVED] |
3201 | jae fat_notroot_next_err |
3202 | jae fat_notroot_next_err |
3202 | mov [eax], ecx |
3203 | mov [eax], ecx |
3203 | and dword [eax+4], 0 |
3204 | and dword [eax+4], 0 |
3204 | @@: |
3205 | @@: |
3205 | pop ecx |
3206 | pop ecx |
3206 | fat_notroot_first: |
3207 | fat_notroot_first: |
3207 | call fat_get_sector |
3208 | call fat_get_sector |
3208 | push ebx |
3209 | push ebx |
3209 | mov edi, buffer |
3210 | mov edi, buffer |
3210 | mov ebx, edi |
3211 | mov ebx, edi |
3211 | call hd_read |
3212 | call hd_read |
3212 | pop ebx |
3213 | pop ebx |
3213 | cmp [hd_error], 0 |
3214 | cmp [hd_error], 0 |
3214 | jnz @f |
3215 | jnz @f |
3215 | ret ; CF=0 |
3216 | ret ; CF=0 |
3216 | fat_notroot_next_err: |
3217 | fat_notroot_next_err: |
3217 | pop ecx |
3218 | pop ecx |
3218 | @@: |
3219 | @@: |
3219 | stc |
3220 | stc |
3220 | ret |
3221 | ret |
3221 | fat_notroot_begin_write: |
3222 | fat_notroot_begin_write: |
3222 | push eax edi |
3223 | push eax edi |
3223 | call fat_notroot_first |
3224 | call fat_notroot_first |
3224 | pop edi eax |
3225 | pop edi eax |
3225 | ret |
3226 | ret |
3226 | fat_notroot_end_write: |
3227 | fat_notroot_end_write: |
3227 | call fat_get_sector |
3228 | call fat_get_sector |
3228 | push ebx |
3229 | push ebx |
3229 | mov ebx, buffer |
3230 | mov ebx, buffer |
3230 | call hd_write |
3231 | call hd_write |
3231 | pop ebx |
3232 | pop ebx |
3232 | ret |
3233 | ret |
3233 | fat_notroot_next_write: |
3234 | fat_notroot_next_write: |
3234 | cmp edi, buffer+0x200 |
3235 | cmp edi, buffer+0x200 |
3235 | jae @f |
3236 | jae @f |
3236 | ret |
3237 | ret |
3237 | @@: |
3238 | @@: |
3238 | push eax |
3239 | push eax |
3239 | call fat_notroot_end_write |
3240 | call fat_notroot_end_write |
3240 | pop eax |
3241 | pop eax |
3241 | jmp fat_notroot_next_sector |
3242 | jmp fat_notroot_next_sector |
3242 | fat_notroot_extend_dir: |
3243 | fat_notroot_extend_dir: |
3243 | push eax |
3244 | push eax |
3244 | mov eax, [eax] |
3245 | mov eax, [eax] |
3245 | call get_free_FAT |
3246 | call get_free_FAT |
3246 | jnc .found |
3247 | jnc .found |
3247 | pop eax |
3248 | pop eax |
3248 | ret ; CF=1 |
3249 | ret ; CF=1 |
3249 | .found: |
3250 | .found: |
3250 | push edx |
3251 | push edx |
3251 | mov edx, [fatEND] |
3252 | mov edx, [fatEND] |
3252 | call set_FAT |
3253 | call set_FAT |
3253 | mov edx, eax |
3254 | mov edx, eax |
3254 | mov eax, [esp+4] |
3255 | mov eax, [esp+4] |
3255 | mov eax, [eax] |
3256 | mov eax, [eax] |
3256 | push edx |
3257 | push edx |
3257 | mov [f_del], 1 |
3258 | mov [f_del], 1 |
3258 | call set_FAT |
3259 | call set_FAT |
3259 | pop edx |
3260 | pop edx |
3260 | cmp [hd_error], 0 |
3261 | cmp [hd_error], 0 |
3261 | jz @f |
3262 | jz @f |
3262 | pop edx |
3263 | pop edx |
3263 | pop eax |
3264 | pop eax |
3264 | stc |
3265 | stc |
3265 | ret |
3266 | ret |
3266 | @@: |
3267 | @@: |
3267 | push ecx |
3268 | push ecx |
3268 | or ecx, -1 |
3269 | or ecx, -1 |
3269 | call add_disk_free_space |
3270 | call add_disk_free_space |
3270 | ; zero new cluster |
3271 | ; zero new cluster |
3271 | mov ecx, 512/4 |
3272 | mov ecx, 512/4 |
3272 | mov edi, buffer |
3273 | mov edi, buffer |
3273 | push edi |
3274 | push edi |
3274 | xor eax, eax |
3275 | xor eax, eax |
3275 | rep stosd |
3276 | rep stosd |
3276 | pop edi |
3277 | pop edi |
3277 | pop ecx |
3278 | pop ecx |
3278 | mov eax, [esp+4] |
3279 | mov eax, [esp+4] |
3279 | mov [eax], edx |
3280 | mov [eax], edx |
3280 | and dword [eax+4], 0 |
3281 | and dword [eax+4], 0 |
3281 | pop edx |
3282 | pop edx |
3282 | mov eax, [eax] |
3283 | mov eax, [eax] |
3283 | dec eax |
3284 | dec eax |
3284 | dec eax |
3285 | dec eax |
3285 | push ebx ecx |
3286 | push ebx ecx |
3286 | mov ecx, [SECTORS_PER_CLUSTER] |
3287 | mov ecx, [SECTORS_PER_CLUSTER] |
3287 | imul eax, ecx |
3288 | imul eax, ecx |
3288 | add eax, [DATA_START] |
3289 | add eax, [DATA_START] |
3289 | mov ebx, edi |
3290 | mov ebx, edi |
3290 | @@: |
3291 | @@: |
3291 | call hd_write |
3292 | call hd_write |
3292 | inc eax |
3293 | inc eax |
3293 | loop @b |
3294 | loop @b |
3294 | pop ecx ebx eax |
3295 | pop ecx ebx eax |
3295 | clc |
3296 | clc |
3296 | ret |
3297 | ret |
3297 | 3298 | ||
3298 | fat_get_sector: |
3299 | fat_get_sector: |
3299 | push ecx |
3300 | push ecx |
3300 | mov ecx, [eax] |
3301 | mov ecx, [eax] |
3301 | dec ecx |
3302 | dec ecx |
3302 | dec ecx |
3303 | dec ecx |
3303 | imul ecx, [SECTORS_PER_CLUSTER] |
3304 | imul ecx, [SECTORS_PER_CLUSTER] |
3304 | add ecx, [DATA_START] |
3305 | add ecx, [DATA_START] |
3305 | add ecx, [eax+4] |
3306 | add ecx, [eax+4] |
3306 | mov eax, ecx |
3307 | mov eax, ecx |
3307 | pop ecx |
3308 | pop ecx |
3308 | ret |
3309 | ret |
3309 | 3310 | ||
3310 | ;---------------------------------------------------------------- |
3311 | ;---------------------------------------------------------------- |
3311 | ; |
3312 | ; |
3312 | ; fs_HdRewrite - LFN variant for writing hard disk |
3313 | ; fs_HdRewrite - LFN variant for writing hard disk |
3313 | ; |
3314 | ; |
3314 | ; esi points to filename |
3315 | ; esi points to filename |
3315 | ; ebx ignored (reserved) |
3316 | ; ebx ignored (reserved) |
3316 | ; ecx number of bytes to write, 0+ |
3317 | ; ecx number of bytes to write, 0+ |
3317 | ; edx mem location to data |
3318 | ; edx mem location to data |
3318 | ; |
3319 | ; |
3319 | ; ret ebx = number of written bytes |
3320 | ; ret ebx = number of written bytes |
3320 | ; eax = 0 ok read or other = errormsg |
3321 | ; eax = 0 ok read or other = errormsg |
3321 | ; |
3322 | ; |
3322 | ;-------------------------------------------------------------- |
3323 | ;-------------------------------------------------------------- |
3323 | fshrad: |
3324 | fshrad: |
3324 | mov eax, ERROR_ACCESS_DENIED |
3325 | mov eax, ERROR_ACCESS_DENIED |
3325 | xor ebx, ebx |
3326 | xor ebx, ebx |
3326 | ret |
3327 | ret |
3327 | fshrfs: |
3328 | fshrfs: |
3328 | mov eax, ERROR_UNKNOWN_FS |
3329 | mov eax, ERROR_UNKNOWN_FS |
3329 | xor ebx, ebx |
3330 | xor ebx, ebx |
3330 | ret |
3331 | ret |
3331 | 3332 | ||
3332 | fs_HdRewrite: |
3333 | fs_HdRewrite: |
3333 | cmp [fat_type], 0 |
3334 | cmp [fat_type], 0 |
3334 | jz fshrfs |
3335 | jz fshrfs |
3335 | cmp byte [esi], 0 |
3336 | cmp byte [esi], 0 |
3336 | jz fshrad |
3337 | jz fshrad |
3337 | pushad |
3338 | pushad |
3338 | xor ebp, ebp |
3339 | xor ebp, ebp |
3339 | push esi |
3340 | push esi |
3340 | @@: |
3341 | @@: |
3341 | lodsb |
3342 | lodsb |
3342 | test al, al |
3343 | test al, al |
3343 | jz @f |
3344 | jz @f |
3344 | cmp al, '/' |
3345 | cmp al, '/' |
3345 | jnz @b |
3346 | jnz @b |
3346 | lea ebp, [esi-1] |
3347 | lea ebp, [esi-1] |
3347 | jmp @b |
3348 | jmp @b |
3348 | @@: |
3349 | @@: |
3349 | pop esi |
3350 | pop esi |
3350 | test ebp, ebp |
3351 | test ebp, ebp |
3351 | jnz .noroot |
3352 | jnz .noroot |
3352 | mov ebp, [ROOT_CLUSTER] |
3353 | mov ebp, [ROOT_CLUSTER] |
3353 | cmp [fat_type], 32 |
3354 | cmp [fat_type], 32 |
3354 | jz .pushnotroot |
3355 | jz .pushnotroot |
3355 | push fat16_root_extend_dir |
3356 | push fat16_root_extend_dir |
3356 | push fat16_root_end_write |
3357 | push fat16_root_end_write |
3357 | push fat16_root_next_write |
3358 | push fat16_root_next_write |
3358 | push fat16_root_begin_write |
3359 | push fat16_root_begin_write |
3359 | xor ebp, ebp |
3360 | xor ebp, ebp |
3360 | push ebp |
3361 | push ebp |
3361 | push ebp |
3362 | push ebp |
3362 | push fat16_root_first |
3363 | push fat16_root_first |
3363 | push fat16_root_next |
3364 | push fat16_root_next |
3364 | jmp .common1 |
3365 | jmp .common1 |
3365 | .noroot: |
3366 | .noroot: |
3366 | ; check existence |
3367 | ; check existence |
3367 | mov byte [ebp], 0 |
3368 | mov byte [ebp], 0 |
3368 | call hd_find_lfn |
3369 | call hd_find_lfn |
3369 | mov byte [ebp], '/' |
3370 | mov byte [ebp], '/' |
3370 | lea esi, [ebp+1] |
3371 | lea esi, [ebp+1] |
3371 | jnc @f |
3372 | jnc @f |
3372 | mov eax, ERROR_FILE_NOT_FOUND |
3373 | mov eax, ERROR_FILE_NOT_FOUND |
3373 | .ret1: |
3374 | .ret1: |
3374 | mov [esp+28], eax |
3375 | mov [esp+28], eax |
3375 | popad |
3376 | popad |
3376 | xor ebx, ebx |
3377 | xor ebx, ebx |
3377 | ret |
3378 | ret |
3378 | @@: |
3379 | @@: |
3379 | test byte [edi+11], 0x10 ; must be directory |
3380 | test byte [edi+11], 0x10 ; must be directory |
3380 | mov eax, ERROR_ACCESS_DENIED |
3381 | mov eax, ERROR_ACCESS_DENIED |
3381 | jz .ret1 |
3382 | jz .ret1 |
3382 | mov ebp, [edi+20-2] |
3383 | mov ebp, [edi+20-2] |
3383 | mov bp, [edi+26] ; ebp=cluster |
3384 | mov bp, [edi+26] ; ebp=cluster |
3384 | mov eax, ERROR_FAT_TABLE |
3385 | mov eax, ERROR_FAT_TABLE |
3385 | cmp ebp, 2 |
3386 | cmp ebp, 2 |
3386 | jb .ret1 |
3387 | jb .ret1 |
3387 | .pushnotroot: |
3388 | .pushnotroot: |
3388 | push fat_notroot_extend_dir |
3389 | push fat_notroot_extend_dir |
3389 | push fat_notroot_end_write |
3390 | push fat_notroot_end_write |
3390 | push fat_notroot_next_write |
3391 | push fat_notroot_next_write |
3391 | push fat_notroot_begin_write |
3392 | push fat_notroot_begin_write |
3392 | push 0 |
3393 | push 0 |
3393 | push ebp |
3394 | push ebp |
3394 | push fat_notroot_first |
3395 | push fat_notroot_first |
3395 | push fat_notroot_next |
3396 | push fat_notroot_next |
3396 | .common1: |
3397 | .common1: |
3397 | call fat_find_lfn |
3398 | call fat_find_lfn |
3398 | jc .notfound |
3399 | jc .notfound |
- | 3400 | ; found; must not be directory |
|
- | 3401 | test byte [edi+11], 10h |
|
- | 3402 | jz @f |
|
- | 3403 | add esp, 32 |
|
- | 3404 | popad |
|
- | 3405 | mov eax, ERROR_ACCESS_DENIED |
|
- | 3406 | xor ebx, ebx |
|
- | 3407 | ret |
|
- | 3408 | @@: |
|
3399 | ; found, delete FAT chain |
3409 | ; delete FAT chain |
3400 | push edi |
3410 | push edi |
3401 | xor eax, eax |
3411 | xor eax, eax |
3402 | mov dword [edi+28], eax ; zero size |
3412 | mov dword [edi+28], eax ; zero size |
3403 | xor ecx, ecx |
3413 | xor ecx, ecx |
3404 | mov eax, [edi+20-2] |
3414 | mov eax, [edi+20-2] |
3405 | mov ax, [edi+26] |
3415 | mov ax, [edi+26] |
3406 | mov word [edi+20], cx |
3416 | mov word [edi+20], cx |
3407 | mov word [edi+26], cx |
3417 | mov word [edi+26], cx |
3408 | test eax, eax |
3418 | test eax, eax |
3409 | jz .done1 |
3419 | jz .done1 |
3410 | mov [f_del], 1 |
3420 | mov [f_del], 1 |
3411 | @@: |
3421 | @@: |
3412 | cmp eax, [fatRESERVED] |
3422 | cmp eax, [fatRESERVED] |
3413 | jae .done1 |
3423 | jae .done1 |
3414 | push edx |
3424 | push edx |
3415 | xor edx, edx |
3425 | xor edx, edx |
3416 | call set_FAT |
3426 | call set_FAT |
3417 | mov eax, edx |
3427 | mov eax, edx |
3418 | pop edx |
3428 | pop edx |
3419 | inc ecx |
3429 | inc ecx |
3420 | jmp @b |
3430 | jmp @b |
3421 | .done1: |
3431 | .done1: |
3422 | pop edi |
3432 | pop edi |
3423 | call get_time_for_file |
3433 | call get_time_for_file |
3424 | mov [edi+22], ax |
3434 | mov [edi+22], ax |
3425 | call get_date_for_file |
3435 | call get_date_for_file |
3426 | mov [edi+24], ax |
3436 | mov [edi+24], ax |
3427 | mov [edi+18], ax |
3437 | mov [edi+18], ax |
3428 | or byte [edi+11], 20h ; set 'archive' attribute |
3438 | or byte [edi+11], 20h ; set 'archive' attribute |
3429 | jmp .doit |
3439 | jmp .doit |
3430 | .notfound: |
3440 | .notfound: |
3431 | ; file is not found; generate short name |
3441 | ; file is not found; generate short name |
3432 | call fat_name_is_legal |
3442 | call fat_name_is_legal |
3433 | jc @f |
3443 | jc @f |
3434 | add esp, 32 |
3444 | add esp, 32 |
3435 | popad |
3445 | popad |
3436 | mov eax, ERROR_FILE_NOT_FOUND |
3446 | mov eax, ERROR_FILE_NOT_FOUND |
3437 | xor ebx, ebx |
3447 | xor ebx, ebx |
3438 | ret |
3448 | ret |
3439 | @@: |
3449 | @@: |
3440 | sub esp, 12 |
3450 | sub esp, 12 |
3441 | mov edi, esp |
3451 | mov edi, esp |
3442 | call fat_gen_short_name |
3452 | call fat_gen_short_name |
3443 | .test_short_name_loop: |
3453 | .test_short_name_loop: |
3444 | push esi edi ecx |
3454 | push esi edi ecx |
3445 | mov esi, edi |
3455 | mov esi, edi |
3446 | lea eax, [esp+12+12+8] |
3456 | lea eax, [esp+12+12+8] |
3447 | mov [eax], ebp |
3457 | mov [eax], ebp |
3448 | and dword [eax+4], 0 |
3458 | and dword [eax+4], 0 |
3449 | call dword [eax-4] |
3459 | call dword [eax-4] |
3450 | jc .found |
3460 | jc .found |
3451 | .test_short_name_entry: |
3461 | .test_short_name_entry: |
3452 | cmp byte [edi+11], 0xF |
3462 | cmp byte [edi+11], 0xF |
3453 | jz .test_short_name_cont |
3463 | jz .test_short_name_cont |
3454 | mov ecx, 11 |
3464 | mov ecx, 11 |
3455 | push esi edi |
3465 | push esi edi |
3456 | repz cmpsb |
3466 | repz cmpsb |
3457 | pop edi esi |
3467 | pop edi esi |
3458 | jz .short_name_found |
3468 | jz .short_name_found |
3459 | .test_short_name_cont: |
3469 | .test_short_name_cont: |
3460 | lea eax, [esp+12+12+8] |
3470 | lea eax, [esp+12+12+8] |
3461 | call dword [eax-8] |
3471 | call dword [eax-8] |
3462 | jnc .test_short_name_entry |
3472 | jnc .test_short_name_entry |
3463 | jmp .found |
3473 | jmp .found |
3464 | .short_name_found: |
3474 | .short_name_found: |
3465 | pop ecx edi esi |
3475 | pop ecx edi esi |
3466 | call fat_next_short_name |
3476 | call fat_next_short_name |
3467 | jnc .test_short_name_loop |
3477 | jnc .test_short_name_loop |
3468 | .disk_full: |
3478 | .disk_full: |
3469 | add esp, 12+32 |
3479 | add esp, 12+32 |
3470 | popa |
3480 | popa |
3471 | mov eax, ERROR_DISK_FULL |
3481 | mov eax, ERROR_DISK_FULL |
3472 | xor ebx, ebx |
3482 | xor ebx, ebx |
3473 | ret |
3483 | ret |
3474 | .found: |
3484 | .found: |
3475 | pop ecx edi esi |
3485 | pop ecx edi esi |
3476 | ; now find space in directory |
3486 | ; now find space in directory |
3477 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
3487 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
3478 | mov al, '~' |
3488 | mov al, '~' |
3479 | push ecx edi |
3489 | push ecx edi |
3480 | mov ecx, 8 |
3490 | mov ecx, 8 |
3481 | repnz scasb |
3491 | repnz scasb |
3482 | push 1 |
3492 | push 1 |
3483 | pop eax ; 1 entry |
3493 | pop eax ; 1 entry |
3484 | jnz .notilde |
3494 | jnz .notilde |
3485 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
3495 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
3486 | xor eax, eax |
3496 | xor eax, eax |
3487 | @@: |
3497 | @@: |
3488 | cmp byte [esi], 0 |
3498 | cmp byte [esi], 0 |
3489 | jz @f |
3499 | jz @f |
3490 | inc esi |
3500 | inc esi |
3491 | inc eax |
3501 | inc eax |
3492 | jmp @b |
3502 | jmp @b |
3493 | @@: |
3503 | @@: |
3494 | sub esi, eax |
3504 | sub esi, eax |
3495 | add eax, 12+13 |
3505 | add eax, 12+13 |
3496 | mov ecx, 13 |
3506 | mov ecx, 13 |
3497 | push edx |
3507 | push edx |
3498 | cdq |
3508 | cdq |
3499 | div ecx |
3509 | div ecx |
3500 | pop edx |
3510 | pop edx |
3501 | .notilde: |
3511 | .notilde: |
3502 | push -1 |
3512 | push -1 |
3503 | push -1 |
3513 | push -1 |
3504 | push -1 |
3514 | push -1 |
3505 | ; find |
3515 | ; find |
3506 | xor ecx, ecx |
3516 | xor ecx, ecx |
3507 | push eax |
3517 | push eax |
3508 | lea eax, [esp+16+8+12+8] |
3518 | lea eax, [esp+16+8+12+8] |
3509 | mov [eax], ebp |
3519 | mov [eax], ebp |
3510 | and dword [eax+4], 0 |
3520 | and dword [eax+4], 0 |
3511 | call dword [eax-4] |
3521 | call dword [eax-4] |
3512 | pop eax |
3522 | pop eax |
3513 | jnc .scan_dir |
3523 | jnc .scan_dir |
3514 | .fsfrfe3: |
3524 | .fsfrfe3: |
3515 | add esp, 12+8+12+32 |
3525 | add esp, 12+8+12+32 |
3516 | popad |
3526 | popad |
3517 | mov eax, 11 |
3527 | mov eax, 11 |
3518 | xor ebx, ebx |
3528 | xor ebx, ebx |
3519 | ret |
3529 | ret |
3520 | .scan_dir: |
3530 | .scan_dir: |
3521 | cmp byte [edi], 0 |
3531 | cmp byte [edi], 0 |
3522 | jz .free |
3532 | jz .free |
3523 | cmp byte [edi], 0xE5 |
3533 | cmp byte [edi], 0xE5 |
3524 | jz .free |
3534 | jz .free |
3525 | xor ecx, ecx |
3535 | xor ecx, ecx |
3526 | .scan_cont: |
3536 | .scan_cont: |
3527 | push eax |
3537 | push eax |
3528 | lea eax, [esp+16+8+12+8] |
3538 | lea eax, [esp+16+8+12+8] |
3529 | call dword [eax-8] |
3539 | call dword [eax-8] |
3530 | pop eax |
3540 | pop eax |
3531 | jnc .scan_dir |
3541 | jnc .scan_dir |
3532 | cmp [hd_error], 0 |
3542 | cmp [hd_error], 0 |
3533 | jnz .fsfrfe3 |
3543 | jnz .fsfrfe3 |
3534 | push eax |
3544 | push eax |
3535 | lea eax, [esp+16+8+12+8] |
3545 | lea eax, [esp+16+8+12+8] |
3536 | call dword [eax+20] ; extend directory |
3546 | call dword [eax+20] ; extend directory |
3537 | pop eax |
3547 | pop eax |
3538 | jnc .scan_dir |
3548 | jnc .scan_dir |
3539 | add esp, 12+8+12+32 |
3549 | add esp, 12+8+12+32 |
3540 | popad |
3550 | popad |
3541 | mov eax, ERROR_DISK_FULL |
3551 | mov eax, ERROR_DISK_FULL |
3542 | xor ebx, ebx |
3552 | xor ebx, ebx |
3543 | ret |
3553 | ret |
3544 | .free: |
3554 | .free: |
3545 | test ecx, ecx |
3555 | test ecx, ecx |
3546 | jnz @f |
3556 | jnz @f |
3547 | mov [esp], edi |
3557 | mov [esp], edi |
3548 | mov ecx, [esp+12+8+12+8] |
3558 | mov ecx, [esp+12+8+12+8] |
3549 | mov [esp+4], ecx |
3559 | mov [esp+4], ecx |
3550 | mov ecx, [esp+12+8+12+12] |
3560 | mov ecx, [esp+12+8+12+12] |
3551 | mov [esp+8], ecx |
3561 | mov [esp+8], ecx |
3552 | xor ecx, ecx |
3562 | xor ecx, ecx |
3553 | @@: |
3563 | @@: |
3554 | inc ecx |
3564 | inc ecx |
3555 | cmp ecx, eax |
3565 | cmp ecx, eax |
3556 | jb .scan_cont |
3566 | jb .scan_cont |
3557 | ; found! |
3567 | ; found! |
3558 | ; calculate name checksum |
3568 | ; calculate name checksum |
3559 | push esi ecx |
3569 | push esi ecx |
3560 | mov esi, [esp+8+12] |
3570 | mov esi, [esp+8+12] |
3561 | mov ecx, 11 |
3571 | mov ecx, 11 |
3562 | xor eax, eax |
3572 | xor eax, eax |
3563 | @@: |
3573 | @@: |
3564 | ror al, 1 |
3574 | ror al, 1 |
3565 | add al, [esi] |
3575 | add al, [esi] |
3566 | inc esi |
3576 | inc esi |
3567 | loop @b |
3577 | loop @b |
3568 | pop ecx esi |
3578 | pop ecx esi |
3569 | pop edi |
3579 | pop edi |
3570 | pop dword [esp+8+12+12] |
3580 | pop dword [esp+8+12+12] |
3571 | pop dword [esp+8+12+12] |
3581 | pop dword [esp+8+12+12] |
3572 | ; edi points to first entry in free chunk |
3582 | ; edi points to first entry in free chunk |
3573 | dec ecx |
3583 | dec ecx |
3574 | jz .nolfn |
3584 | jz .nolfn |
3575 | push esi |
3585 | push esi |
3576 | push eax |
3586 | push eax |
3577 | lea eax, [esp+8+8+12+8] |
3587 | lea eax, [esp+8+8+12+8] |
3578 | call dword [eax+8] ; begin write |
3588 | call dword [eax+8] ; begin write |
3579 | mov al, 40h |
3589 | mov al, 40h |
3580 | .writelfn: |
3590 | .writelfn: |
3581 | or al, cl |
3591 | or al, cl |
3582 | mov esi, [esp+4] |
3592 | mov esi, [esp+4] |
3583 | push ecx |
3593 | push ecx |
3584 | dec ecx |
3594 | dec ecx |
3585 | imul ecx, 13 |
3595 | imul ecx, 13 |
3586 | add esi, ecx |
3596 | add esi, ecx |
3587 | stosb |
3597 | stosb |
3588 | mov cl, 5 |
3598 | mov cl, 5 |
3589 | call fs_RamdiskRewrite.read_symbols |
3599 | call fs_RamdiskRewrite.read_symbols |
3590 | mov ax, 0xF |
3600 | mov ax, 0xF |
3591 | stosw |
3601 | stosw |
3592 | mov al, [esp+4] |
3602 | mov al, [esp+4] |
3593 | stosb |
3603 | stosb |
3594 | mov cl, 6 |
3604 | mov cl, 6 |
3595 | call fs_RamdiskRewrite.read_symbols |
3605 | call fs_RamdiskRewrite.read_symbols |
3596 | xor eax, eax |
3606 | xor eax, eax |
3597 | stosw |
3607 | stosw |
3598 | mov cl, 2 |
3608 | mov cl, 2 |
3599 | call fs_RamdiskRewrite.read_symbols |
3609 | call fs_RamdiskRewrite.read_symbols |
3600 | pop ecx |
3610 | pop ecx |
3601 | lea eax, [esp+8+8+12+8] |
3611 | lea eax, [esp+8+8+12+8] |
3602 | call dword [eax+12] ; next write |
3612 | call dword [eax+12] ; next write |
3603 | xor eax, eax |
3613 | xor eax, eax |
3604 | loop .writelfn |
3614 | loop .writelfn |
3605 | pop eax |
3615 | pop eax |
3606 | pop esi |
3616 | pop esi |
3607 | ; lea eax, [esp+8+12+8] |
3617 | ; lea eax, [esp+8+12+8] |
3608 | ; call dword [eax+16] ; end write |
3618 | ; call dword [eax+16] ; end write |
3609 | .nolfn: |
3619 | .nolfn: |
3610 | xchg esi, [esp] |
3620 | xchg esi, [esp] |
3611 | mov ecx, 11 |
3621 | mov ecx, 11 |
3612 | rep movsb |
3622 | rep movsb |
3613 | mov word [edi], 20h ; attributes |
3623 | mov word [edi], 20h ; attributes |
3614 | sub edi, 11 |
3624 | sub edi, 11 |
3615 | pop esi ecx |
3625 | pop esi ecx |
3616 | add esp, 12 |
3626 | add esp, 12 |
3617 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
3627 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
3618 | call get_time_for_file |
3628 | call get_time_for_file |
3619 | mov [edi+14], ax ; creation time |
3629 | mov [edi+14], ax ; creation time |
3620 | mov [edi+22], ax ; last write time |
3630 | mov [edi+22], ax ; last write time |
3621 | call get_date_for_file |
3631 | call get_date_for_file |
3622 | mov [edi+16], ax ; creation date |
3632 | mov [edi+16], ax ; creation date |
3623 | mov [edi+24], ax ; last write date |
3633 | mov [edi+24], ax ; last write date |
3624 | mov [edi+18], ax ; last access date |
3634 | mov [edi+18], ax ; last access date |
3625 | xor ecx, ecx |
3635 | xor ecx, ecx |
3626 | mov word [edi+20], cx ; high word of cluster |
3636 | mov word [edi+20], cx ; high word of cluster |
3627 | mov word [edi+26], cx ; low word of cluster - to be filled |
3637 | mov word [edi+26], cx ; low word of cluster - to be filled |
3628 | mov dword [edi+28], ecx ; file size - to be filled |
3638 | mov dword [edi+28], ecx ; file size - to be filled |
3629 | .doit: |
3639 | .doit: |
3630 | lea eax, [esp+8] |
3640 | lea eax, [esp+8] |
3631 | call dword [eax+16] ; flush directory |
3641 | call dword [eax+16] ; flush directory |
3632 | push ecx |
3642 | push ecx |
3633 | mov ecx, [esp+4+32+24] |
3643 | mov ecx, [esp+4+32+24] |
3634 | push ecx |
3644 | push ecx |
3635 | push edi |
3645 | push edi |
3636 | mov esi, edx |
3646 | mov esi, edx |
3637 | test ecx, ecx |
3647 | test ecx, ecx |
3638 | jz .done |
3648 | jz .done |
3639 | mov eax, 2 |
3649 | mov eax, 2 |
3640 | call get_free_FAT |
3650 | call get_free_FAT |
3641 | jc .diskfull |
3651 | jc .diskfull |
3642 | push eax |
3652 | push eax |
3643 | mov [edi+26], ax |
3653 | mov [edi+26], ax |
3644 | shr eax, 16 |
3654 | shr eax, 16 |
3645 | mov [edi+20], ax |
3655 | mov [edi+20], ax |
3646 | lea eax, [esp+16+8] |
3656 | lea eax, [esp+16+8] |
3647 | call dword [eax+16] ; flush directory |
3657 | call dword [eax+16] ; flush directory |
3648 | pop eax |
3658 | pop eax |
3649 | push edx |
3659 | push edx |
3650 | mov edx, [fatEND] |
3660 | mov edx, [fatEND] |
3651 | call set_FAT |
3661 | call set_FAT |
3652 | pop edx |
3662 | pop edx |
3653 | .write_cluster: |
3663 | .write_cluster: |
3654 | push eax |
3664 | push eax |
3655 | dec eax |
3665 | dec eax |
3656 | dec eax |
3666 | dec eax |
3657 | mov ebp, [SECTORS_PER_CLUSTER] |
3667 | mov ebp, [SECTORS_PER_CLUSTER] |
3658 | imul eax, ebp |
3668 | imul eax, ebp |
3659 | add eax, [DATA_START] |
3669 | add eax, [DATA_START] |
3660 | ; write data |
3670 | ; write data |
3661 | .write_sector: |
3671 | .write_sector: |
3662 | mov ecx, 512 |
3672 | mov ecx, 512 |
3663 | cmp dword [esp+8], ecx |
3673 | cmp dword [esp+8], ecx |
3664 | jb .writeshort |
3674 | jb .writeshort |
3665 | ; we can write directly from given buffer |
3675 | ; we can write directly from given buffer |
3666 | mov ebx, esi |
3676 | mov ebx, esi |
3667 | add esi, ecx |
3677 | add esi, ecx |
3668 | jmp .writecommon |
3678 | jmp .writecommon |
3669 | .writeshort: |
3679 | .writeshort: |
3670 | mov ecx, [esp+8] |
3680 | mov ecx, [esp+8] |
3671 | push ecx |
3681 | push ecx |
3672 | mov edi, buffer |
3682 | mov edi, buffer |
3673 | mov ebx, edi |
3683 | mov ebx, edi |
3674 | rep movsb |
3684 | rep movsb |
3675 | mov ecx, buffer+0x200 |
3685 | mov ecx, buffer+0x200 |
3676 | sub ecx, edi |
3686 | sub ecx, edi |
3677 | push eax |
3687 | push eax |
3678 | xor eax, eax |
3688 | xor eax, eax |
3679 | rep stosb |
3689 | rep stosb |
3680 | pop eax |
3690 | pop eax |
3681 | pop ecx |
3691 | pop ecx |
3682 | .writecommon: |
3692 | .writecommon: |
3683 | call hd_write |
3693 | call hd_write |
3684 | cmp [hd_error], 0 |
3694 | cmp [hd_error], 0 |
3685 | jnz .writeerr |
3695 | jnz .writeerr |
3686 | inc eax |
3696 | inc eax |
3687 | sub dword [esp+8], ecx |
3697 | sub dword [esp+8], ecx |
3688 | jz .writedone |
3698 | jz .writedone |
3689 | dec ebp |
3699 | dec ebp |
3690 | jnz .write_sector |
3700 | jnz .write_sector |
3691 | ; allocate new cluster |
3701 | ; allocate new cluster |
3692 | pop eax |
3702 | pop eax |
3693 | mov ecx, eax |
3703 | mov ecx, eax |
3694 | call get_free_FAT |
3704 | call get_free_FAT |
3695 | jc .diskfull |
3705 | jc .diskfull |
3696 | mov [f_del], 1 |
3706 | mov [f_del], 1 |
3697 | push edx |
3707 | push edx |
3698 | mov edx, [fatEND] |
3708 | mov edx, [fatEND] |
3699 | call set_FAT |
3709 | call set_FAT |
3700 | xchg eax, ecx |
3710 | xchg eax, ecx |
3701 | mov edx, ecx |
3711 | mov edx, ecx |
3702 | call set_FAT |
3712 | call set_FAT |
3703 | pop edx |
3713 | pop edx |
3704 | xchg eax, ecx |
3714 | xchg eax, ecx |
3705 | jmp .write_cluster |
3715 | jmp .write_cluster |
3706 | .diskfull: |
3716 | .diskfull: |
3707 | mov eax, ERROR_DISK_FULL |
3717 | mov eax, ERROR_DISK_FULL |
3708 | jmp .ret |
3718 | jmp .ret |
3709 | .writeerr: |
3719 | .writeerr: |
3710 | pop eax |
3720 | pop eax |
3711 | sub esi, ecx |
3721 | sub esi, ecx |
3712 | mov eax, 11 |
3722 | mov eax, 11 |
3713 | jmp .ret |
3723 | jmp .ret |
3714 | .writedone: |
3724 | .writedone: |
3715 | pop eax |
3725 | pop eax |
3716 | .done: |
3726 | .done: |
3717 | xor eax, eax |
3727 | xor eax, eax |
3718 | .ret: |
3728 | .ret: |
3719 | pop edi ecx |
3729 | pop edi ecx |
3720 | mov ebx, esi |
3730 | mov ebx, esi |
3721 | sub ebx, edx |
3731 | sub ebx, edx |
3722 | pop ebp |
3732 | pop ebp |
3723 | mov [esp+32+28], eax |
3733 | mov [esp+32+28], eax |
3724 | lea eax, [esp+8] |
3734 | lea eax, [esp+8] |
3725 | call dword [eax+8] |
3735 | call dword [eax+8] |
3726 | mov [edi+28], ebx |
3736 | mov [edi+28], ebx |
3727 | call dword [eax+16] |
3737 | call dword [eax+16] |
3728 | mov [esp+32+16], ebx |
3738 | mov [esp+32+16], ebx |
3729 | lea eax, [ebx+511] |
3739 | lea eax, [ebx+511] |
3730 | shr eax, 9 |
3740 | shr eax, 9 |
3731 | mov ecx, [SECTORS_PER_CLUSTER] |
3741 | mov ecx, [SECTORS_PER_CLUSTER] |
3732 | lea eax, [eax+ecx-1] |
3742 | lea eax, [eax+ecx-1] |
3733 | xor edx, edx |
3743 | xor edx, edx |
3734 | div ecx |
3744 | div ecx |
3735 | mov ecx, ebp |
3745 | mov ecx, ebp |
3736 | sub ecx, eax |
3746 | sub ecx, eax |
3737 | call add_disk_free_space |
3747 | call add_disk_free_space |
3738 | add esp, 32 |
3748 | add esp, 32 |
3739 | call update_disk |
3749 | call update_disk |
3740 | popad |
3750 | popad |
3741 | ret |
3751 | ret |
3742 | 3752 | ||
3743 | fs_HdGetFileInfo: |
3753 | fs_HdGetFileInfo: |
3744 | cmp [fat_type], 0 |
3754 | cmp [fat_type], 0 |
3745 | jnz @f |
3755 | jnz @f |
3746 | mov eax, ERROR_UNKNOWN_FS |
3756 | mov eax, ERROR_UNKNOWN_FS |
3747 | ret |
3757 | ret |
3748 | @@: |
3758 | @@: |
3749 | cmp byte [esi], 0 |
3759 | cmp byte [esi], 0 |
3750 | jnz @f |
3760 | jnz @f |
3751 | mov eax, 2 |
3761 | mov eax, 2 |
3752 | ret |
3762 | ret |
3753 | @@: |
3763 | @@: |
3754 | push edi |
3764 | push edi |
3755 | call hd_find_lfn |
3765 | call hd_find_lfn |
3756 | pushfd |
3766 | pushfd |
3757 | cmp [hd_error], 0 |
3767 | cmp [hd_error], 0 |
3758 | jz @f |
3768 | jz @f |
3759 | popfd |
3769 | popfd |
3760 | pop edi |
3770 | pop edi |
3761 | mov eax, 11 |
3771 | mov eax, 11 |
3762 | ret |
3772 | ret |
3763 | @@: |
3773 | @@: |
3764 | popfd |
3774 | popfd |
3765 | jmp fs_GetFileInfo_finish |
3775 | jmp fs_GetFileInfo_finish |
3766 | 3776 | ||
3767 | fs_HdSetFileInfo: |
3777 | fs_HdSetFileInfo: |
3768 | cmp [fat_type], 0 |
3778 | cmp [fat_type], 0 |
3769 | jnz @f |
3779 | jnz @f |
3770 | mov eax, ERROR_UNKNOWN_FS |
3780 | mov eax, ERROR_UNKNOWN_FS |
3771 | ret |
3781 | ret |
3772 | @@: |
3782 | @@: |
3773 | cmp byte [esi], 0 |
3783 | cmp byte [esi], 0 |
3774 | jnz @f |
3784 | jnz @f |
3775 | mov eax, 2 |
3785 | mov eax, 2 |
3776 | ret |
3786 | ret |
3777 | @@: |
3787 | @@: |
3778 | push edi |
3788 | push edi |
3779 | call hd_find_lfn |
3789 | call hd_find_lfn |
3780 | pushfd |
3790 | pushfd |
3781 | cmp [hd_error], 0 |
3791 | cmp [hd_error], 0 |
3782 | jz @f |
3792 | jz @f |
3783 | popfd |
3793 | popfd |
3784 | pop edi |
3794 | pop edi |
3785 | mov eax, 11 |
3795 | mov eax, 11 |
3786 | ret |
3796 | ret |
3787 | @@: |
3797 | @@: |
3788 | popfd |
3798 | popfd |
3789 | jnc @f |
3799 | jnc @f |
3790 | pop edi |
3800 | pop edi |
3791 | mov eax, ERROR_FILE_NOT_FOUND |
3801 | mov eax, ERROR_FILE_NOT_FOUND |
3792 | ret |
3802 | ret |
3793 | @@: |
3803 | @@: |
3794 | push eax |
3804 | push eax |
3795 | call bdfe_to_fat_entry |
3805 | call bdfe_to_fat_entry |
3796 | pop eax |
3806 | pop eax |
3797 | mov ebx, buffer |
3807 | mov ebx, buffer |
3798 | call hd_write |
3808 | call hd_write |
3799 | call update_disk |
3809 | call update_disk |
3800 | pop edi |
3810 | pop edi |
3801 | xor eax, eax |
3811 | xor eax, eax |
3802 | ret |
3812 | ret |
- | 3813 | ||
- | 3814 | ;---------------------------------------------------------------- |
|
- | 3815 | ; |
|
- | 3816 | ; fs_HdExecute - LFN variant for executing from harddisk |
|
- | 3817 | ; |
|
- | 3818 | ; esi points to hd filename (e.g. 'dir1/name') |
|
- | 3819 | ; ebp points to full filename (e.g. '/hd0/1/dir1/name') |
|
- | 3820 | ; dword [ebx] = flags |
|
- | 3821 | ; dword [ebx+4] = cmdline |
|
- | 3822 | ; |
|
- | 3823 | ; ret ebx,edx destroyed |
|
- | 3824 | ; eax > 0 - PID, < 0 - error |
|
- | 3825 | ; |
|
- | 3826 | ;-------------------------------------------------------------- |
|
- | 3827 | fs_HdExecute: |
|
- | 3828 | mov edx, [ebx] |
|
- | 3829 | mov ebx, [ebx+4] |
|
- | 3830 | test ebx, ebx |
|
- | 3831 | jz @f |
|
- | 3832 | add ebx, std_application_base_address |
|
- | 3833 | @@: |
|
- | 3834 | ||
- | 3835 | ;---------------------------------------------------------------- |
|
- | 3836 | ; |
|
- | 3837 | ; fs_HdExecute.flags - second entry |
|
- | 3838 | ; |
|
- | 3839 | ; esi points to floppy filename (kernel address) |
|
- | 3840 | ; ebp points to full filename |
|
- | 3841 | ; edx flags |
|
- | 3842 | ; ebx cmdline (kernel address) |
|
- | 3843 | ; |
|
- | 3844 | ; ret eax > 0 - PID, < 0 - error |
|
- | 3845 | ; |
|
- | 3846 | ;-------------------------------------------------------------- |
|
- | 3847 | ||
- | 3848 | .flags: |
|
- | 3849 | cmp [fat_type], 0 |
|
- | 3850 | jnz @f |
|
- | 3851 | mov eax, ERROR_UNKNOWN_FS |
|
- | 3852 | ret |
|
- | 3853 | @@: |
|
- | 3854 | cmp byte [esi], 0 |
|
- | 3855 | jnz @f |
|
- | 3856 | ; cannot execute root! |
|
- | 3857 | mov eax, -ERROR_ACCESS_DENIED |
|
- | 3858 | ret |
|
- | 3859 | @@: |
|
- | 3860 | push edi |
|
- | 3861 | call hd_find_lfn |
|
- | 3862 | jnc .found |
|
- | 3863 | pop edi |
|
- | 3864 | mov eax, -ERROR_FILE_NOT_FOUND |
|
- | 3865 | cmp [hd_error], 0 |
|
- | 3866 | jz @f |
|
- | 3867 | mov al, -11 |
|
- | 3868 | @@: |
|
- | 3869 | ret |
|
- | 3870 | .found: |
|
- | 3871 | mov eax, [edi+20-2] |
|
- | 3872 | mov ax, [edi+26] |
|
- | 3873 | push 0 |
|
- | 3874 | push eax |
|
- | 3875 | push dword [edi+28] ; size |
|
- | 3876 | push .DoRead |
|
- | 3877 | call fs_execute |
|
- | 3878 | add esp, 16 |
|
- | 3879 | pop edi |
|
- | 3880 | ret |
|
- | 3881 | ||
- | 3882 | .DoRead: |
|
- | 3883 | ; read next block |
|
- | 3884 | ; in: eax->parameters, edi->buffer |
|
- | 3885 | ; out: eax = error code |
|
- | 3886 | pushad |
|
- | 3887 | cmp dword [eax], 0 ; file size |
|
- | 3888 | jz .eof |
|
- | 3889 | add eax, 4 |
|
- | 3890 | call fat_get_sector |
|
- | 3891 | mov ebx, edi |
|
- | 3892 | call hd_read |
|
- | 3893 | cmp [hd_error], 0 |
|
- | 3894 | jnz .err |
|
- | 3895 | mov eax, [esp+28] |
|
- | 3896 | mov ecx, [eax] |
|
- | 3897 | sub ecx, 512 |
|
- | 3898 | jae @f |
|
- | 3899 | lea edi, [edi+ecx+512] |
|
- | 3900 | neg ecx |
|
- | 3901 | push eax |
|
- | 3902 | xor eax, eax |
|
- | 3903 | rep stosb |
|
- | 3904 | pop eax |
|
- | 3905 | @@: |
|
- | 3906 | mov [eax], ecx |
|
- | 3907 | mov edx, [eax+8] |
|
- | 3908 | inc edx |
|
- | 3909 | cmp edx, [SECTORS_PER_CLUSTER] |
|
- | 3910 | jb @f |
|
- | 3911 | push eax |
|
- | 3912 | mov eax, [eax+4] |
|
- | 3913 | call get_FAT |
|
- | 3914 | cmp [hd_error], 0 |
|
- | 3915 | jnz .err |
|
- | 3916 | mov ecx, eax |
|
- | 3917 | pop eax |
|
- | 3918 | mov [eax+4], ecx |
|
- | 3919 | xor edx, edx |
|
- | 3920 | @@: |
|
- | 3921 | mov [eax+8], edx |
|
- | 3922 | popad |
|
- | 3923 | xor eax, eax |
|
- | 3924 | ret |
|
- | 3925 | .eof: |
|
- | 3926 | popad |
|
- | 3927 | mov eax, 6 |
|
- | 3928 | ret |
|
- | 3929 | .err: |
|
- | 3930 | popad |
|
- | 3931 | mov eax, 11 |
|
- | 3932 | ret |
|
3803 | 3933 | ||
3804 | ; \end{diamond}=>=>>>>> |
3934 | ; \end{diamond}>>=>=>>>>> |