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1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
2 | ;; ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
5 | ;; ;; |
6 | ;; FAT32.INC ;; |
6 | ;; FAT32.INC ;; |
7 | ;; ;; |
7 | ;; ;; |
8 | ;; FAT functions for KolibriOS ;; |
8 | ;; FAT functions for KolibriOS ;; |
9 | ;; ;; |
9 | ;; ;; |
10 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
10 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
11 | ;; ;; |
11 | ;; ;; |
12 | ;; See file COPYING for details ;; |
12 | ;; See file COPYING for details ;; |
13 | ;; 04.02.2007 LFN create folder - diamond ;; |
13 | ;; 04.02.2007 LFN create folder - diamond ;; |
14 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
14 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
15 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
15 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
16 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
16 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
17 | ;; 23.06.2006 LFN start application - diamond ;; |
17 | ;; 23.06.2006 LFN start application - diamond ;; |
18 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
18 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
19 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
19 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
20 | ;; 04.05.2006 LFN read folder - diamond ;; |
20 | ;; 04.05.2006 LFN read folder - diamond ;; |
21 | ;; 29.04.2006 Elimination of hangup after the ;; |
21 | ;; 29.04.2006 Elimination of hangup after the ;; |
22 | ;; expiration hd_wait_timeout - Mario79 ;; |
22 | ;; expiration hd_wait_timeout - Mario79 ;; |
23 | ;; 23.04.2006 LFN read file - diamond ;; |
23 | ;; 23.04.2006 LFN read file - diamond ;; |
24 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
24 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
25 | ;; to MBR, see file part_set.inc - Mario79 ;; |
25 | ;; to MBR, see file part_set.inc - Mario79 ;; |
26 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
26 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
27 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
27 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
28 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
28 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
29 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
29 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
30 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
30 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
31 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
31 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
32 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
32 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
33 | ;; 08.11.2004 rename - ATV ;; |
33 | ;; 08.11.2004 rename - ATV ;; |
34 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
34 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
35 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
35 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
36 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
36 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
37 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
37 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
38 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
38 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
39 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
39 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
40 | ;; 30.3.2004 Error parameters at function return - VT ;; |
40 | ;; 30.3.2004 Error parameters at function return - VT ;; |
41 | ;; 01.5.2002 Bugfix in device write - VT ;; |
41 | ;; 01.5.2002 Bugfix in device write - VT ;; |
42 | ;; 20.5.2002 Hd status check - VT ;; |
42 | ;; 20.5.2002 Hd status check - VT ;; |
43 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
43 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
44 | ;; ;; |
44 | ;; ;; |
45 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
45 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
46 | 46 | ||
47 | $Revision: 4273 $ |
47 | $Revision: 5089 $ |
48 | 48 | ||
49 | 49 | ||
50 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
50 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
51 | 51 | ||
52 | PUSHAD_EAX equ [esp+28] |
52 | PUSHAD_EAX equ [esp+28] |
53 | PUSHAD_ECX equ [esp+24] |
53 | PUSHAD_ECX equ [esp+24] |
54 | PUSHAD_EDX equ [esp+20] |
54 | PUSHAD_EDX equ [esp+20] |
55 | PUSHAD_EBX equ [esp+16] |
55 | PUSHAD_EBX equ [esp+16] |
56 | PUSHAD_EBP equ [esp+8] |
56 | PUSHAD_EBP equ [esp+8] |
57 | PUSHAD_ESI equ [esp+4] |
57 | PUSHAD_ESI equ [esp+4] |
58 | PUSHAD_EDI equ [esp+0] |
58 | PUSHAD_EDI equ [esp+0] |
59 | 59 | ||
60 | ; Internal data for every FAT partition. |
60 | ; Internal data for every FAT partition. |
61 | struct FAT PARTITION |
61 | struct FAT PARTITION |
62 | fs_type db ? |
62 | fs_type db ? |
63 | fat16_root db 0 ; flag for fat16 rootdir |
63 | fat16_root db 0 ; flag for fat16 rootdir |
64 | fat_change db 0 ; 1=fat has changed |
64 | fat_change db 0 ; 1=fat has changed |
65 | db ? ; alignment |
65 | db ? ; alignment |
66 | Lock MUTEX ? ; currently operations with one partition |
66 | Lock MUTEX ? ; currently operations with one partition |
67 | ; can not be executed in parallel since the |
67 | ; can not be executed in parallel since the |
68 | ; legacy code is not ready; this mutex guards |
68 | ; legacy code is not ready; this mutex guards |
69 | ; all operations |
69 | ; all operations |
70 | SECTORS_PER_FAT dd 0x1f3a |
70 | SECTORS_PER_FAT dd 0x1f3a |
71 | NUMBER_OF_FATS dd 0x2 |
71 | NUMBER_OF_FATS dd 0x2 |
72 | SECTORS_PER_CLUSTER dd 0x8 |
72 | SECTORS_PER_CLUSTER dd 0x8 |
73 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
73 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
74 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
74 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
75 | FAT_START dd 0 ; start of fat table |
75 | FAT_START dd 0 ; start of fat table |
76 | ROOT_START dd 0 ; start of rootdir (only fat16) |
76 | ROOT_START dd 0 ; start of rootdir (only fat16) |
77 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
77 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
78 | DATA_START dd 0 ; start of data area (=first cluster 2) |
78 | DATA_START dd 0 ; start of data area (=first cluster 2) |
79 | LAST_CLUSTER dd 0 ; last availabe cluster |
79 | LAST_CLUSTER dd 0 ; last availabe cluster |
80 | ADR_FSINFO dd 0 ; used only by fat32 |
80 | ADR_FSINFO dd 0 ; used only by fat32 |
81 | 81 | ||
82 | fatRESERVED dd 0x0FFFFFF6 |
82 | fatRESERVED dd 0x0FFFFFF6 |
83 | fatBAD dd 0x0FFFFFF7 |
83 | fatBAD dd 0x0FFFFFF7 |
84 | fatEND dd 0x0FFFFFF8 |
84 | fatEND dd 0x0FFFFFF8 |
85 | fatMASK dd 0x0FFFFFFF |
85 | fatMASK dd 0x0FFFFFFF |
86 | 86 | ||
87 | fatStartScan dd 2 |
87 | fatStartScan dd 2 |
88 | 88 | ||
89 | cluster_tmp dd 0 ; used by analyze_directory |
89 | cluster_tmp dd 0 ; used by analyze_directory |
90 | ; and analyze_directory_to_write |
90 | ; and analyze_directory_to_write |
91 | 91 | ||
92 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
92 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
93 | longname_sec2 dd 0 ; directory sectors for delete long filename |
93 | longname_sec2 dd 0 ; directory sectors for delete long filename |
94 | 94 | ||
95 | fat_in_cache dd -1 |
95 | fat_in_cache dd -1 |
96 | 96 | ||
97 | ; For FAT16/FAT32, this points to 512-byte buffer for the current sector of FAT. |
97 | ; For FAT16/FAT32, this points to 512-byte buffer for the current sector of FAT. |
98 | ; For FAT12, the entire FAT structure is read |
98 | ; For FAT12, the entire FAT structure is read |
99 | ; and unpacked from 12bit per cluster to word per cluster. |
99 | ; and unpacked from 12bit per cluster to word per cluster. |
100 | ; |
100 | ; |
101 | ; Note: work with unpacked copy of FAT12 means |
101 | ; Note: work with unpacked copy of FAT12 means |
102 | ; additional memory and additional code for packing/unpacking. |
102 | ; additional memory and additional code for packing/unpacking. |
103 | ; I'm not sure that the economy justifies the cost, but anyway, |
103 | ; I'm not sure that the economy justifies the cost, but anyway, |
104 | ; there is how work was done before my edits, and I'm just keeping the principle. |
104 | ; there is how work was done before my edits, and I'm just keeping the principle. |
105 | fat_cache_ptr dd ? |
105 | fat_cache_ptr dd ? |
106 | fat12_unpacked_ptr dd ? |
106 | fat12_unpacked_ptr dd ? |
107 | buffer rb 512 |
107 | buffer rb 512 |
108 | fsinfo_buffer rb 512 |
108 | fsinfo_buffer rb 512 |
109 | ends |
109 | ends |
110 | 110 | ||
111 | uglobal |
111 | uglobal |
112 | align 4 |
112 | align 4 |
113 | partition_count dd 0 ; partitions found by set_FAT32_variables |
113 | partition_count dd 0 ; partitions found by set_FAT32_variables |
114 | 114 | ||
115 | hd_error dd 0 ; set by wait_for_sector_buffer |
115 | hd_error dd 0 ; set by wait_for_sector_buffer |
116 | hd_setup dd 0 |
116 | hd_setup dd 0 |
117 | hd_wait_timeout dd 0 |
117 | hd_wait_timeout dd 0 |
118 | 118 | ||
119 | cache_search_start dd 0 ; used by find_empty_slot |
119 | cache_search_start dd 0 ; used by find_empty_slot |
120 | endg |
120 | endg |
121 | 121 | ||
122 | uglobal |
122 | uglobal |
123 | align 4 |
123 | align 4 |
124 | Sector512: ; label for dev_hdcd.inc |
124 | Sector512: ; label for dev_hdcd.inc |
125 | buffer: |
125 | buffer: |
126 | times 512 db 0 |
126 | times 512 db 0 |
127 | endg |
127 | endg |
128 | 128 | ||
129 | iglobal |
129 | iglobal |
130 | align 4 |
130 | align 4 |
131 | fat_user_functions: |
131 | fat_user_functions: |
132 | dd fat_free |
132 | dd fat_free |
133 | dd (fat_user_functions_end - fat_user_functions - 4) / 4 |
133 | dd (fat_user_functions_end - fat_user_functions - 4) / 4 |
134 | dd fat_Read |
134 | dd fat_Read |
135 | dd fat_ReadFolder |
135 | dd fat_ReadFolder |
136 | dd fat_Rewrite |
136 | dd fat_Rewrite |
137 | dd fat_Write |
137 | dd fat_Write |
138 | dd fat_SetFileEnd |
138 | dd fat_SetFileEnd |
139 | dd fat_GetFileInfo |
139 | dd fat_GetFileInfo |
140 | dd fat_SetFileInfo |
140 | dd fat_SetFileInfo |
141 | dd 0 |
141 | dd 0 |
142 | dd fat_Delete |
142 | dd fat_Delete |
143 | dd fat_CreateFolder |
143 | dd fat_CreateFolder |
144 | fat_user_functions_end: |
144 | fat_user_functions_end: |
145 | endg |
145 | endg |
146 | 146 | ||
147 | ; these labels are located before the main function to make |
147 | ; these labels are located before the main function to make |
148 | ; most of jumps to these be short |
148 | ; most of jumps to these be short |
149 | fat_create_partition.free_return0: |
149 | fat_create_partition.free_return0: |
150 | mov eax, ebp |
150 | mov eax, ebp |
151 | call free |
151 | call free |
152 | pop ebp |
152 | pop ebp |
153 | fat_create_partition.return0: |
153 | fat_create_partition.return0: |
154 | xor eax, eax |
154 | xor eax, eax |
155 | ret |
155 | ret |
156 | fat_create_partition: |
156 | fat_create_partition: |
- | 157 | ; sector size must be 512 |
|
- | 158 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
|
- | 159 | jnz .return0 |
|
157 | ; bootsector must have been successfully read |
160 | ; bootsector must have been successfully read |
158 | cmp dword [esp+4], 0 |
161 | cmp dword [esp+4], 0 |
159 | jnz .return0 |
162 | jnz .return0 |
160 | ; bootsector signature must be correct |
163 | ; bootsector signature must be correct |
161 | cmp word [ebx+0x1fe], 0xaa55 |
164 | cmp word [ebx+0x1fe], 0xaa55 |
162 | jnz .return0 |
165 | jnz .return0 |
163 | ; sectors per cluster must be nonzero |
166 | ; sectors per cluster must be nonzero |
164 | cmp byte [ebx+0xd], 0 |
167 | cmp byte [ebx+0xd], 0 |
165 | jz .return0 |
168 | jz .return0 |
166 | ; bytes per sector must be 0x200 |
169 | ; bytes per sector must be 0x200 |
167 | cmp word [ebx+0xb], 0x200 |
170 | cmp word [ebx+0xb], 0x200 |
168 | jnz .return0 |
171 | jnz .return0 |
169 | ; number of fats must be nonzero |
172 | ; number of fats must be nonzero |
170 | cmp byte [ebx+0x10], 0 |
173 | cmp byte [ebx+0x10], 0 |
171 | jz .return0 |
174 | jz .return0 |
172 | ; The only reason to be invalid partition now is FAT12. Since the test for |
175 | ; The only reason to be invalid partition now is FAT12. Since the test for |
173 | ; FAT size requires knowledge of some calculated values, which are also used |
176 | ; FAT size requires knowledge of some calculated values, which are also used |
174 | ; in the normal operation, let's hope for the best and allocate data now; if |
177 | ; in the normal operation, let's hope for the best and allocate data now; if |
175 | ; it will prove wrong, just deallocate it. |
178 | ; it will prove wrong, just deallocate it. |
176 | movi eax, sizeof.FAT |
179 | movi eax, sizeof.FAT |
177 | call malloc |
180 | call malloc |
178 | test eax, eax |
181 | test eax, eax |
179 | jz .return0 |
182 | jz .return0 |
180 | mov ecx, dword [ebp+PARTITION.FirstSector] |
183 | mov ecx, dword [ebp+PARTITION.FirstSector] |
181 | mov dword [eax+FAT.FirstSector], ecx |
184 | mov dword [eax+FAT.FirstSector], ecx |
182 | mov ecx, dword [ebp+PARTITION.FirstSector+4] |
185 | mov ecx, dword [ebp+PARTITION.FirstSector+4] |
183 | mov dword [eax+FAT.FirstSector+4], ecx |
186 | mov dword [eax+FAT.FirstSector+4], ecx |
184 | mov ecx, dword [ebp+PARTITION.Length] |
187 | mov ecx, dword [ebp+PARTITION.Length] |
185 | mov dword [eax+FAT.Length], ecx |
188 | mov dword [eax+FAT.Length], ecx |
186 | mov ecx, dword [ebp+PARTITION.Length+4] |
189 | mov ecx, dword [ebp+PARTITION.Length+4] |
187 | mov dword [eax+FAT.Length+4], ecx |
190 | mov dword [eax+FAT.Length+4], ecx |
188 | mov ecx, [ebp+PARTITION.Disk] |
191 | mov ecx, [ebp+PARTITION.Disk] |
189 | mov [eax+FAT.Disk], ecx |
192 | mov [eax+FAT.Disk], ecx |
190 | mov [eax+FAT.FSUserFunctions], fat_user_functions |
193 | mov [eax+FAT.FSUserFunctions], fat_user_functions |
191 | or [eax+FAT.fat_in_cache], -1 |
194 | or [eax+FAT.fat_in_cache], -1 |
192 | mov [eax+FAT.fat_change], 0 |
195 | mov [eax+FAT.fat_change], 0 |
193 | push ebp |
196 | push ebp |
194 | mov ebp, eax |
197 | mov ebp, eax |
195 | 198 | ||
196 | lea ecx, [ebp+FAT.Lock] |
199 | lea ecx, [ebp+FAT.Lock] |
197 | call mutex_init |
200 | call mutex_init |
198 | 201 | ||
199 | movzx eax, word [ebx+0xe] ; sectors reserved |
202 | movzx eax, word [ebx+0xe] ; sectors reserved |
200 | mov [ebp+FAT.FAT_START], eax |
203 | mov [ebp+FAT.FAT_START], eax |
201 | 204 | ||
202 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
205 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
203 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
206 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
204 | 207 | ||
205 | movzx ecx, word [ebx+0xb] ; bytes per sector |
208 | movzx ecx, word [ebx+0xb] ; bytes per sector |
206 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
209 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
207 | 210 | ||
208 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
211 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
209 | shl eax, 5 ; mul 32 |
212 | shl eax, 5 ; mul 32 |
210 | dec ecx |
213 | dec ecx |
211 | add eax, ecx ; round up if not equal count |
214 | add eax, ecx ; round up if not equal count |
212 | inc ecx ; bytes per sector |
215 | inc ecx ; bytes per sector |
213 | xor edx, edx |
216 | xor edx, edx |
214 | div ecx |
217 | div ecx |
215 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
218 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
216 | 219 | ||
217 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
220 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
218 | test eax, eax |
221 | test eax, eax |
219 | jnz @f |
222 | jnz @f |
220 | mov eax, [ebx+0x24] ; sectors per fat |
223 | mov eax, [ebx+0x24] ; sectors per fat |
221 | @@: |
224 | @@: |
222 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
225 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
223 | 226 | ||
224 | movzx eax, byte [ebx+0x10] ; number of fats |
227 | movzx eax, byte [ebx+0x10] ; number of fats |
225 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
228 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
226 | mul [ebp+FAT.SECTORS_PER_FAT] |
229 | mul [ebp+FAT.SECTORS_PER_FAT] |
227 | test edx, edx |
230 | test edx, edx |
228 | jnz .free_return0 |
231 | jnz .free_return0 |
229 | add eax, [ebp+FAT.FAT_START] |
232 | add eax, [ebp+FAT.FAT_START] |
230 | jc .free_return0 |
233 | jc .free_return0 |
231 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
234 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
232 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
235 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
233 | jc .free_return0 |
236 | jc .free_return0 |
234 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
237 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
235 | 238 | ||
236 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
239 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
237 | test eax, eax |
240 | test eax, eax |
238 | jnz @f |
241 | jnz @f |
239 | mov eax, [ebx+0x20] ; total sector count |
242 | mov eax, [ebx+0x20] ; total sector count |
240 | @@: |
243 | @@: |
241 | ; total sector count must not exceed partition size |
244 | ; total sector count must not exceed partition size |
242 | cmp dword [ebp+FAT.Length+4], 0 |
245 | cmp dword [ebp+FAT.Length+4], 0 |
243 | jnz @f |
246 | jnz @f |
244 | cmp eax, dword [ebp+FAT.Length] |
247 | cmp eax, dword [ebp+FAT.Length] |
245 | ja .free_return0 |
248 | ja .free_return0 |
246 | @@: |
249 | @@: |
247 | mov dword [ebp+FAT.Length], eax |
250 | mov dword [ebp+FAT.Length], eax |
248 | and dword [ebp+FAT.Length+4], 0 |
251 | and dword [ebp+FAT.Length+4], 0 |
249 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
252 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
250 | jc .free_return0 |
253 | jc .free_return0 |
251 | xor edx, edx |
254 | xor edx, edx |
252 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
255 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
253 | inc eax |
256 | inc eax |
254 | mov [ebp+FAT.LAST_CLUSTER], eax |
257 | mov [ebp+FAT.LAST_CLUSTER], eax |
255 | dec eax ; cluster count |
258 | dec eax ; cluster count |
256 | jz .free_return0 |
259 | jz .free_return0 |
257 | mov [ebp+FAT.fatStartScan], 2 |
260 | mov [ebp+FAT.fatStartScan], 2 |
258 | 261 | ||
259 | ; limits by Microsoft Hardware White Paper v1.03 |
262 | ; limits by Microsoft Hardware White Paper v1.03 |
260 | cmp eax, 4085 ; 0xff5 |
263 | cmp eax, 4085 ; 0xff5 |
261 | jb .fat12 |
264 | jb .fat12 |
262 | cmp eax, 65525 ; 0xfff5 |
265 | cmp eax, 65525 ; 0xfff5 |
263 | jb .fat16 |
266 | jb .fat16 |
264 | .fat32: |
267 | .fat32: |
265 | mov eax, [ebx+0x2c] ; rootdir cluster |
268 | mov eax, [ebx+0x2c] ; rootdir cluster |
266 | mov [ebp+FAT.ROOT_CLUSTER], eax |
269 | mov [ebp+FAT.ROOT_CLUSTER], eax |
267 | movzx eax, word [ebx+0x30] |
270 | movzx eax, word [ebx+0x30] |
268 | mov [ebp+FAT.ADR_FSINFO], eax |
271 | mov [ebp+FAT.ADR_FSINFO], eax |
269 | push ebx |
272 | push ebx |
270 | add ebx, 512 |
273 | add ebx, 512 |
271 | call fs_read32_sys |
274 | call fs_read32_sys |
272 | test eax, eax |
275 | test eax, eax |
273 | jnz @f |
276 | jnz @f |
274 | mov eax, [ebx+0x1ec] |
277 | mov eax, [ebx+0x1ec] |
275 | cmp eax, -1 |
278 | cmp eax, -1 |
276 | jz @f |
279 | jz @f |
277 | mov [ebp+FAT.fatStartScan], eax |
280 | mov [ebp+FAT.fatStartScan], eax |
278 | @@: |
281 | @@: |
279 | pop ebx |
282 | pop ebx |
280 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
283 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
281 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
284 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
282 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
285 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
283 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
286 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
284 | mov al, 32 |
287 | mov al, 32 |
285 | .fat_not_12_finalize: |
288 | .fat_not_12_finalize: |
286 | mov [ebp+FAT.fs_type], al |
289 | mov [ebp+FAT.fs_type], al |
287 | ; For FAT16 and FAT32, allocate 512 bytes for FAT cache. |
290 | ; For FAT16 and FAT32, allocate 512 bytes for FAT cache. |
288 | mov eax, 512 |
291 | mov eax, 512 |
289 | call malloc |
292 | call malloc |
290 | test eax, eax |
293 | test eax, eax |
291 | jz .free_return0 |
294 | jz .free_return0 |
292 | mov [ebp+FAT.fat_cache_ptr], eax |
295 | mov [ebp+FAT.fat_cache_ptr], eax |
293 | mov eax, ebp |
296 | mov eax, ebp |
294 | pop ebp |
297 | pop ebp |
295 | ret |
298 | ret |
296 | .fat16: |
299 | .fat16: |
297 | and [ebp+FAT.ROOT_CLUSTER], 0 |
300 | and [ebp+FAT.ROOT_CLUSTER], 0 |
298 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
301 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
299 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
302 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
300 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
303 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
301 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
304 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
302 | mov al, 16 |
305 | mov al, 16 |
303 | jmp .fat_not_12_finalize |
306 | jmp .fat_not_12_finalize |
304 | .fat12: |
307 | .fat12: |
305 | and [ebp+FAT.ROOT_CLUSTER], 0 |
308 | and [ebp+FAT.ROOT_CLUSTER], 0 |
306 | mov [ebp+FAT.fatRESERVED], 0xFF6 |
309 | mov [ebp+FAT.fatRESERVED], 0xFF6 |
307 | mov [ebp+FAT.fatBAD], 0xFF7 |
310 | mov [ebp+FAT.fatBAD], 0xFF7 |
308 | mov [ebp+FAT.fatEND], 0xFFF |
311 | mov [ebp+FAT.fatEND], 0xFFF |
309 | mov [ebp+FAT.fatMASK], 0xFFF |
312 | mov [ebp+FAT.fatMASK], 0xFFF |
310 | mov al, 12 |
313 | mov al, 12 |
311 | mov [ebp+FAT.fs_type], al |
314 | mov [ebp+FAT.fs_type], al |
312 | ; For FAT12, allocate&read data for entire table: |
315 | ; For FAT12, allocate&read data for entire table: |
313 | ; calculate A = ALIGN_UP(NUM_CLUSTERS, 8), |
316 | ; calculate A = ALIGN_UP(NUM_CLUSTERS, 8), |
314 | ; calculatefatchain/restorefatchain will process A items, |
317 | ; calculatefatchain/restorefatchain will process A items, |
315 | ; allocate ALIGN_UP(A*3/2, 512) bytes for FAT table plus A*2 bytes for unpacked data. |
318 | ; allocate ALIGN_UP(A*3/2, 512) bytes for FAT table plus A*2 bytes for unpacked data. |
316 | mov eax, [ebp+FAT.LAST_CLUSTER] |
319 | mov eax, [ebp+FAT.LAST_CLUSTER] |
317 | and eax, not 7 |
320 | and eax, not 7 |
318 | add eax, 8 |
321 | add eax, 8 |
319 | mov edx, eax |
322 | mov edx, eax |
320 | lea eax, [eax*3] |
323 | lea eax, [eax*3] |
321 | add eax, 512*2-1 |
324 | add eax, 512*2-1 |
322 | shr eax, 10 |
325 | shr eax, 10 |
323 | shl eax, 9 |
326 | shl eax, 9 |
324 | lea eax, [eax+edx*2] |
327 | lea eax, [eax+edx*2] |
325 | call malloc |
328 | call malloc |
326 | test eax, eax |
329 | test eax, eax |
327 | jz .free_return0 |
330 | jz .free_return0 |
328 | ; Read ALIGN_UP(NUM_CLUSTERS*3/2, 512) bytes. |
331 | ; Read ALIGN_UP(NUM_CLUSTERS*3/2, 512) bytes. |
329 | ; Note that this can be less than allocated, this is ok, |
332 | ; Note that this can be less than allocated, this is ok, |
330 | ; overallocation simplifies calculatefatchain/restorefatchain. |
333 | ; overallocation simplifies calculatefatchain/restorefatchain. |
331 | push ebx |
334 | push ebx |
332 | mov [ebp+FAT.fat_cache_ptr], eax |
335 | mov [ebp+FAT.fat_cache_ptr], eax |
333 | mov edx, [ebp+FAT.LAST_CLUSTER] |
336 | mov edx, [ebp+FAT.LAST_CLUSTER] |
334 | lea edx, [(edx+1)*3 + 512*2-1] |
337 | lea edx, [(edx+1)*3 + 512*2-1] |
335 | shr edx, 10 |
338 | shr edx, 10 |
336 | xchg eax, ebx |
339 | xchg eax, ebx |
337 | xor eax, eax |
340 | xor eax, eax |
338 | .read_fat: |
341 | .read_fat: |
339 | push eax |
342 | push eax |
340 | add eax, [ebp+FAT.FAT_START] |
343 | add eax, [ebp+FAT.FAT_START] |
341 | call fs_read32_sys |
344 | call fs_read32_sys |
342 | test eax, eax |
345 | test eax, eax |
343 | pop eax |
346 | pop eax |
344 | jz @f |
347 | jz @f |
345 | dbgstr 'Failed to read FAT table' |
348 | dbgstr 'Failed to read FAT table' |
346 | mov eax, [ebp+FAT.fat_cache_ptr] |
349 | mov eax, [ebp+FAT.fat_cache_ptr] |
347 | call free |
350 | call free |
348 | pop ebx |
351 | pop ebx |
349 | jmp .free_return0 |
352 | jmp .free_return0 |
350 | @@: |
353 | @@: |
351 | add ebx, 512 |
354 | add ebx, 512 |
352 | inc eax |
355 | inc eax |
353 | cmp eax, edx |
356 | cmp eax, edx |
354 | jb .read_fat |
357 | jb .read_fat |
355 | mov [ebp+FAT.fat12_unpacked_ptr], ebx |
358 | mov [ebp+FAT.fat12_unpacked_ptr], ebx |
356 | call calculatefatchain |
359 | call calculatefatchain |
357 | pop ebx |
360 | pop ebx |
358 | mov eax, ebp |
361 | mov eax, ebp |
359 | pop ebp |
362 | pop ebp |
360 | ret |
363 | ret |
361 | 364 | ||
362 | fat_free: |
365 | fat_free: |
363 | push eax |
366 | push eax |
364 | mov eax, [eax+FAT.fat_cache_ptr] |
367 | mov eax, [eax+FAT.fat_cache_ptr] |
365 | call free |
368 | call free |
366 | pop eax |
369 | pop eax |
367 | jmp free |
370 | jmp free |
368 | 371 | ||
369 | calculatefatchain: |
372 | calculatefatchain: |
370 | 373 | ||
371 | pushad |
374 | pushad |
372 | 375 | ||
373 | mov esi, [ebp+FAT.fat_cache_ptr] |
376 | mov esi, [ebp+FAT.fat_cache_ptr] |
374 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
377 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
375 | 378 | ||
376 | mov edx, [ebp+FAT.LAST_CLUSTER] |
379 | mov edx, [ebp+FAT.LAST_CLUSTER] |
377 | and edx, not 7 |
380 | and edx, not 7 |
378 | lea edx, [edi+(edx+8)*2] |
381 | lea edx, [edi+(edx+8)*2] |
379 | push edx |
382 | push edx |
380 | 383 | ||
381 | fcnew: |
384 | fcnew: |
382 | mov eax, dword [esi] |
385 | mov eax, dword [esi] |
383 | mov ebx, dword [esi+4] |
386 | mov ebx, dword [esi+4] |
384 | mov ecx, dword [esi+8] |
387 | mov ecx, dword [esi+8] |
385 | mov edx, ecx |
388 | mov edx, ecx |
386 | shr edx, 4;8 ok |
389 | shr edx, 4;8 ok |
387 | shr dx, 4;7 ok |
390 | shr dx, 4;7 ok |
388 | xor ch, ch |
391 | xor ch, ch |
389 | shld ecx, ebx, 20;6 ok |
392 | shld ecx, ebx, 20;6 ok |
390 | shr cx, 4;5 ok |
393 | shr cx, 4;5 ok |
391 | shld ebx, eax, 12 |
394 | shld ebx, eax, 12 |
392 | and ebx, 0x0fffffff;4 ok |
395 | and ebx, 0x0fffffff;4 ok |
393 | shr bx, 4;3 ok |
396 | shr bx, 4;3 ok |
394 | shl eax, 4 |
397 | shl eax, 4 |
395 | and eax, 0x0fffffff;2 ok |
398 | and eax, 0x0fffffff;2 ok |
396 | shr ax, 4;1 ok |
399 | shr ax, 4;1 ok |
397 | mov dword [edi], eax |
400 | mov dword [edi], eax |
398 | mov dword [edi+4], ebx |
401 | mov dword [edi+4], ebx |
399 | mov dword [edi+8], ecx |
402 | mov dword [edi+8], ecx |
400 | mov dword [edi+12], edx |
403 | mov dword [edi+12], edx |
401 | add edi, 16 |
404 | add edi, 16 |
402 | add esi, 12 |
405 | add esi, 12 |
403 | 406 | ||
404 | cmp edi, [esp] |
407 | cmp edi, [esp] |
405 | jnz fcnew |
408 | jnz fcnew |
406 | pop eax |
409 | pop eax |
407 | 410 | ||
408 | popad |
411 | popad |
409 | ret |
412 | ret |
410 | 413 | ||
411 | 414 | ||
412 | restorefatchain: ; restore fat chain |
415 | restorefatchain: ; restore fat chain |
413 | 416 | ||
414 | pushad |
417 | pushad |
415 | 418 | ||
416 | mov esi, [ebp+FAT.fat12_unpacked_ptr] |
419 | mov esi, [ebp+FAT.fat12_unpacked_ptr] |
417 | mov edi, [ebp+FAT.fat_cache_ptr] |
420 | mov edi, [ebp+FAT.fat_cache_ptr] |
418 | 421 | ||
419 | mov edx, [ebp+FAT.LAST_CLUSTER] |
422 | mov edx, [ebp+FAT.LAST_CLUSTER] |
420 | and edx, not 7 |
423 | and edx, not 7 |
421 | lea edx, [esi+(edx+8)*2] |
424 | lea edx, [esi+(edx+8)*2] |
422 | 425 | ||
423 | fcnew2: |
426 | fcnew2: |
424 | mov eax, dword [esi] |
427 | mov eax, dword [esi] |
425 | mov ebx, dword [esi+4] |
428 | mov ebx, dword [esi+4] |
426 | shl ax, 4 |
429 | shl ax, 4 |
427 | shl eax, 4 |
430 | shl eax, 4 |
428 | shl bx, 4 |
431 | shl bx, 4 |
429 | shr ebx, 4 |
432 | shr ebx, 4 |
430 | shrd eax, ebx, 8 |
433 | shrd eax, ebx, 8 |
431 | shr ebx, 8 |
434 | shr ebx, 8 |
432 | mov dword [edi], eax |
435 | mov dword [edi], eax |
433 | mov word [edi+4], bx |
436 | mov word [edi+4], bx |
434 | add edi, 6 |
437 | add edi, 6 |
435 | add esi, 8 |
438 | add esi, 8 |
436 | 439 | ||
437 | cmp esi, edx |
440 | cmp esi, edx |
438 | jb fcnew2 |
441 | jb fcnew2 |
439 | 442 | ||
440 | mov esi, [ebp+FAT.NUMBER_OF_FATS] |
443 | mov esi, [ebp+FAT.NUMBER_OF_FATS] |
441 | mov edx, [ebp+FAT.LAST_CLUSTER] |
444 | mov edx, [ebp+FAT.LAST_CLUSTER] |
442 | lea edx, [(edx+1)*3 + 512*2-1] |
445 | lea edx, [(edx+1)*3 + 512*2-1] |
443 | shr edx, 10 |
446 | shr edx, 10 |
444 | push [ebp+FAT.FAT_START] |
447 | push [ebp+FAT.FAT_START] |
445 | 448 | ||
446 | .write_fats: |
449 | .write_fats: |
447 | xor eax, eax |
450 | xor eax, eax |
448 | mov ebx, [ebp+FAT.fat_cache_ptr] |
451 | mov ebx, [ebp+FAT.fat_cache_ptr] |
449 | .loop1: |
452 | .loop1: |
450 | push eax |
453 | push eax |
451 | add eax, [esp+4] |
454 | add eax, [esp+4] |
452 | call fs_write32_sys |
455 | call fs_write32_sys |
453 | test eax, eax |
456 | test eax, eax |
454 | pop eax |
457 | pop eax |
455 | jnz .fail |
458 | jnz .fail |
456 | add ebx, 512 |
459 | add ebx, 512 |
457 | inc eax |
460 | inc eax |
458 | cmp eax, edx |
461 | cmp eax, edx |
459 | jb .loop1 |
462 | jb .loop1 |
460 | pop eax |
463 | pop eax |
461 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
464 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
462 | push eax |
465 | push eax |
463 | dec esi |
466 | dec esi |
464 | jnz .write_fats |
467 | jnz .write_fats |
465 | pop eax |
468 | pop eax |
466 | 469 | ||
467 | popad |
470 | popad |
468 | ret |
471 | ret |
469 | .fail: |
472 | .fail: |
470 | dbgstr 'Failed to save FAT' |
473 | dbgstr 'Failed to save FAT' |
471 | popad |
474 | popad |
472 | ret |
475 | ret |
473 | 476 | ||
474 | iglobal |
477 | iglobal |
475 | label fat_legal_chars byte |
478 | label fat_legal_chars byte |
476 | ; 0 = not allowed |
479 | ; 0 = not allowed |
477 | ; 1 = allowed only in long names |
480 | ; 1 = allowed only in long names |
478 | ; 3 = allowed |
481 | ; 3 = allowed |
479 | times 32 db 0 |
482 | times 32 db 0 |
480 | ; ! " # $ % & ' ( ) * + , - . / |
483 | ; ! " # $ % & ' ( ) * + , - . / |
481 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
484 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
482 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
485 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
483 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
486 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
484 | ; @ A B C D E F G H I J K L M N O |
487 | ; @ A B C D E F G H I J K L M N O |
485 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
488 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
486 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
489 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
487 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
490 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
488 | ; ` a b c d e f g h i j k l m n o |
491 | ; ` a b c d e f g h i j k l m n o |
489 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
492 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
490 | ; p q r s t u v w x y z { | } ~ |
493 | ; p q r s t u v w x y z { | } ~ |
491 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
494 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
492 | endg |
495 | endg |
493 | 496 | ||
494 | fat_name_is_legal: |
497 | fat_name_is_legal: |
495 | ; in: esi->(long) name |
498 | ; in: esi->(long) name |
496 | ; out: CF set <=> legal |
499 | ; out: CF set <=> legal |
497 | ; destroys eax |
500 | ; destroys eax |
498 | push esi |
501 | push esi |
499 | xor eax, eax |
502 | xor eax, eax |
500 | @@: |
503 | @@: |
501 | lodsb |
504 | lodsb |
502 | test al, al |
505 | test al, al |
503 | jz .done |
506 | jz .done |
504 | cmp al, 80h |
507 | cmp al, 80h |
505 | jae .big |
508 | jae .big |
506 | test [fat_legal_chars+eax], 1 |
509 | test [fat_legal_chars+eax], 1 |
507 | jnz @b |
510 | jnz @b |
508 | .err: |
511 | .err: |
509 | pop esi |
512 | pop esi |
510 | clc |
513 | clc |
511 | ret |
514 | ret |
512 | .big: |
515 | .big: |
513 | ; 0x80-0xAF, 0xE0-0xEF |
516 | ; 0x80-0xAF, 0xE0-0xEF |
514 | cmp al, 0xB0 |
517 | cmp al, 0xB0 |
515 | jb @b |
518 | jb @b |
516 | cmp al, 0xE0 |
519 | cmp al, 0xE0 |
517 | jb .err |
520 | jb .err |
518 | cmp al, 0xF0 |
521 | cmp al, 0xF0 |
519 | jb @b |
522 | jb @b |
520 | jmp .err |
523 | jmp .err |
521 | .done: |
524 | .done: |
522 | sub esi, [esp] |
525 | sub esi, [esp] |
523 | cmp esi, 257 |
526 | cmp esi, 257 |
524 | pop esi |
527 | pop esi |
525 | ret |
528 | ret |
526 | 529 | ||
527 | fat_next_short_name: |
530 | fat_next_short_name: |
528 | ; in: edi->8+3 name |
531 | ; in: edi->8+3 name |
529 | ; out: name corrected |
532 | ; out: name corrected |
530 | ; CF=1 <=> error |
533 | ; CF=1 <=> error |
531 | pushad |
534 | pushad |
532 | mov ecx, 8 |
535 | mov ecx, 8 |
533 | mov al, '~' |
536 | mov al, '~' |
534 | std |
537 | std |
535 | push edi |
538 | push edi |
536 | add edi, 7 |
539 | add edi, 7 |
537 | repnz scasb |
540 | repnz scasb |
538 | pop edi |
541 | pop edi |
539 | cld |
542 | cld |
540 | jz .tilde |
543 | jz .tilde |
541 | ; tilde is not found, insert "~1" at end |
544 | ; tilde is not found, insert "~1" at end |
542 | add edi, 6 |
545 | add edi, 6 |
543 | cmp word [edi], ' ' |
546 | cmp word [edi], ' ' |
544 | jnz .insert_tilde |
547 | jnz .insert_tilde |
545 | @@: |
548 | @@: |
546 | dec edi |
549 | dec edi |
547 | cmp byte [edi], ' ' |
550 | cmp byte [edi], ' ' |
548 | jz @b |
551 | jz @b |
549 | inc edi |
552 | inc edi |
550 | .insert_tilde: |
553 | .insert_tilde: |
551 | mov word [edi], '~1' |
554 | mov word [edi], '~1' |
552 | popad |
555 | popad |
553 | clc |
556 | clc |
554 | ret |
557 | ret |
555 | .tilde: |
558 | .tilde: |
556 | push edi |
559 | push edi |
557 | add edi, 7 |
560 | add edi, 7 |
558 | xor ecx, ecx |
561 | xor ecx, ecx |
559 | @@: |
562 | @@: |
560 | ; after tilde may be only digits and trailing spaces |
563 | ; after tilde may be only digits and trailing spaces |
561 | cmp byte [edi], '~' |
564 | cmp byte [edi], '~' |
562 | jz .break |
565 | jz .break |
563 | cmp byte [edi], ' ' |
566 | cmp byte [edi], ' ' |
564 | jz .space |
567 | jz .space |
565 | cmp byte [edi], '9' |
568 | cmp byte [edi], '9' |
566 | jnz .found |
569 | jnz .found |
567 | dec edi |
570 | dec edi |
568 | jmp @b |
571 | jmp @b |
569 | .space: |
572 | .space: |
570 | dec edi |
573 | dec edi |
571 | inc ecx |
574 | inc ecx |
572 | jmp @b |
575 | jmp @b |
573 | .found: |
576 | .found: |
574 | inc byte [edi] |
577 | inc byte [edi] |
575 | add dword [esp], 8 |
578 | add dword [esp], 8 |
576 | jmp .zerorest |
579 | jmp .zerorest |
577 | .break: |
580 | .break: |
578 | jecxz .noplace |
581 | jecxz .noplace |
579 | inc edi |
582 | inc edi |
580 | mov al, '1' |
583 | mov al, '1' |
581 | @@: |
584 | @@: |
582 | xchg al, [edi] |
585 | xchg al, [edi] |
583 | inc edi |
586 | inc edi |
584 | cmp al, ' ' |
587 | cmp al, ' ' |
585 | mov al, '0' |
588 | mov al, '0' |
586 | jnz @b |
589 | jnz @b |
587 | .succ: |
590 | .succ: |
588 | pop edi |
591 | pop edi |
589 | popad |
592 | popad |
590 | clc |
593 | clc |
591 | ret |
594 | ret |
592 | .noplace: |
595 | .noplace: |
593 | dec edi |
596 | dec edi |
594 | cmp edi, [esp] |
597 | cmp edi, [esp] |
595 | jz .err |
598 | jz .err |
596 | add dword [esp], 8 |
599 | add dword [esp], 8 |
597 | mov word [edi], '~1' |
600 | mov word [edi], '~1' |
598 | inc edi |
601 | inc edi |
599 | inc edi |
602 | inc edi |
600 | @@: |
603 | @@: |
601 | mov byte [edi], '0' |
604 | mov byte [edi], '0' |
602 | .zerorest: |
605 | .zerorest: |
603 | inc edi |
606 | inc edi |
604 | cmp edi, [esp] |
607 | cmp edi, [esp] |
605 | jb @b |
608 | jb @b |
606 | pop edi |
609 | pop edi |
607 | popad |
610 | popad |
608 | ;clc ; automatically |
611 | ;clc ; automatically |
609 | ret |
612 | ret |
610 | .err: |
613 | .err: |
611 | pop edi |
614 | pop edi |
612 | popad |
615 | popad |
613 | stc |
616 | stc |
614 | ret |
617 | ret |
615 | 618 | ||
616 | fat_gen_short_name: |
619 | fat_gen_short_name: |
617 | ; in: esi->long name |
620 | ; in: esi->long name |
618 | ; edi->buffer (8+3=11 chars) |
621 | ; edi->buffer (8+3=11 chars) |
619 | ; out: buffer filled |
622 | ; out: buffer filled |
620 | pushad |
623 | pushad |
621 | mov eax, ' ' |
624 | mov eax, ' ' |
622 | push edi |
625 | push edi |
623 | stosd |
626 | stosd |
624 | stosd |
627 | stosd |
625 | stosd |
628 | stosd |
626 | pop edi |
629 | pop edi |
627 | xor eax, eax |
630 | xor eax, eax |
628 | movi ebx, 8 |
631 | movi ebx, 8 |
629 | lea ecx, [edi+8] |
632 | lea ecx, [edi+8] |
630 | .loop: |
633 | .loop: |
631 | lodsb |
634 | lodsb |
632 | test al, al |
635 | test al, al |
633 | jz .done |
636 | jz .done |
634 | call char_toupper |
637 | call char_toupper |
635 | cmp al, ' ' |
638 | cmp al, ' ' |
636 | jz .space |
639 | jz .space |
637 | cmp al, 80h |
640 | cmp al, 80h |
638 | ja .big |
641 | ja .big |
639 | test [fat_legal_chars+eax], 2 |
642 | test [fat_legal_chars+eax], 2 |
640 | jnz .symbol |
643 | jnz .symbol |
641 | .inv_symbol: |
644 | .inv_symbol: |
642 | mov al, '_' |
645 | mov al, '_' |
643 | or bh, 1 |
646 | or bh, 1 |
644 | .symbol: |
647 | .symbol: |
645 | cmp al, '.' |
648 | cmp al, '.' |
646 | jz .dot |
649 | jz .dot |
647 | .normal_symbol: |
650 | .normal_symbol: |
648 | dec bl |
651 | dec bl |
649 | jns .store |
652 | jns .store |
650 | mov bl, 0 |
653 | mov bl, 0 |
651 | .space: |
654 | .space: |
652 | or bh, 1 |
655 | or bh, 1 |
653 | jmp .loop |
656 | jmp .loop |
654 | .store: |
657 | .store: |
655 | stosb |
658 | stosb |
656 | jmp .loop |
659 | jmp .loop |
657 | .big: |
660 | .big: |
658 | cmp al, 0xB0 |
661 | cmp al, 0xB0 |
659 | jb .normal_symbol |
662 | jb .normal_symbol |
660 | cmp al, 0xE0 |
663 | cmp al, 0xE0 |
661 | jb .inv_symbol |
664 | jb .inv_symbol |
662 | cmp al, 0xF0 |
665 | cmp al, 0xF0 |
663 | jb .normal_symbol |
666 | jb .normal_symbol |
664 | jmp .inv_symbol |
667 | jmp .inv_symbol |
665 | .dot: |
668 | .dot: |
666 | test bh, 2 |
669 | test bh, 2 |
667 | jz .firstdot |
670 | jz .firstdot |
668 | pop ebx |
671 | pop ebx |
669 | add ebx, edi |
672 | add ebx, edi |
670 | sub ebx, ecx |
673 | sub ebx, ecx |
671 | push ebx |
674 | push ebx |
672 | cmp ebx, ecx |
675 | cmp ebx, ecx |
673 | jb @f |
676 | jb @f |
674 | pop ebx |
677 | pop ebx |
675 | push ecx |
678 | push ecx |
676 | @@: |
679 | @@: |
677 | cmp edi, ecx |
680 | cmp edi, ecx |
678 | jbe .skip |
681 | jbe .skip |
679 | @@: |
682 | @@: |
680 | dec edi |
683 | dec edi |
681 | mov al, [edi] |
684 | mov al, [edi] |
682 | dec ebx |
685 | dec ebx |
683 | mov [ebx], al |
686 | mov [ebx], al |
684 | mov byte [edi], ' ' |
687 | mov byte [edi], ' ' |
685 | cmp edi, ecx |
688 | cmp edi, ecx |
686 | ja @b |
689 | ja @b |
687 | .skip: |
690 | .skip: |
688 | mov bh, 3 |
691 | mov bh, 3 |
689 | jmp @f |
692 | jmp @f |
690 | .firstdot: |
693 | .firstdot: |
691 | cmp bl, 8 |
694 | cmp bl, 8 |
692 | jz .space |
695 | jz .space |
693 | push edi |
696 | push edi |
694 | or bh, 2 |
697 | or bh, 2 |
695 | @@: |
698 | @@: |
696 | mov edi, ecx |
699 | mov edi, ecx |
697 | mov bl, 3 |
700 | mov bl, 3 |
698 | jmp .loop |
701 | jmp .loop |
699 | .done: |
702 | .done: |
700 | test bh, 2 |
703 | test bh, 2 |
701 | jz @f |
704 | jz @f |
702 | pop edi |
705 | pop edi |
703 | @@: |
706 | @@: |
704 | lea edi, [ecx-8] |
707 | lea edi, [ecx-8] |
705 | test bh, 1 |
708 | test bh, 1 |
706 | jz @f |
709 | jz @f |
707 | call fat_next_short_name |
710 | call fat_next_short_name |
708 | @@: |
711 | @@: |
709 | popad |
712 | popad |
710 | ret |
713 | ret |
711 | 714 | ||
712 | fat12_free_space: |
715 | fat12_free_space: |
713 | ;--------------------------------------------- |
716 | ;--------------------------------------------- |
714 | ; |
717 | ; |
715 | ; returns free space in edi |
718 | ; returns free space in edi |
716 | ; rewr.by Mihasik |
719 | ; rewr.by Mihasik |
717 | ;--------------------------------------------- |
720 | ;--------------------------------------------- |
718 | 721 | ||
719 | push eax ebx ecx |
722 | push eax ebx ecx |
720 | 723 | ||
721 | mov edi, [ebp+FAT.fat12_unpacked_ptr];start of FAT |
724 | mov edi, [ebp+FAT.fat12_unpacked_ptr];start of FAT |
722 | xor ax, ax;Free cluster=0x0000 in FAT |
725 | xor ax, ax;Free cluster=0x0000 in FAT |
723 | xor ebx, ebx;counter |
726 | xor ebx, ebx;counter |
724 | mov ecx, [ebp+FAT.LAST_CLUSTER] |
727 | mov ecx, [ebp+FAT.LAST_CLUSTER] |
725 | inc ecx |
728 | inc ecx |
726 | cld |
729 | cld |
727 | rdfs1: |
730 | rdfs1: |
728 | repne scasw |
731 | repne scasw |
729 | jnz rdfs2 ;if last cluster not 0 |
732 | jnz rdfs2 ;if last cluster not 0 |
730 | inc ebx |
733 | inc ebx |
731 | test ecx, ecx |
734 | test ecx, ecx |
732 | jnz rdfs1 |
735 | jnz rdfs1 |
733 | rdfs2: |
736 | rdfs2: |
734 | shl ebx, 9;free clusters*512 |
737 | shl ebx, 9;free clusters*512 |
735 | mov edi, ebx |
738 | mov edi, ebx |
736 | 739 | ||
737 | pop ecx ebx eax |
740 | pop ecx ebx eax |
738 | ret |
741 | ret |
739 | 742 | ||
740 | 743 | ||
741 | 744 | ||
742 | set_FAT: |
745 | set_FAT: |
743 | ;-------------------------------- |
746 | ;-------------------------------- |
744 | ; input : EAX = cluster |
747 | ; input : EAX = cluster |
745 | ; EDX = value to save |
748 | ; EDX = value to save |
746 | ; EBP = pointer to FAT structure |
749 | ; EBP = pointer to FAT structure |
747 | ; output : EDX = old value |
750 | ; output : EDX = old value |
748 | ;-------------------------------- |
751 | ;-------------------------------- |
749 | ; out: CF set <=> error |
752 | ; out: CF set <=> error |
750 | push eax ebx esi |
753 | push eax ebx esi |
751 | 754 | ||
752 | cmp eax, 2 |
755 | cmp eax, 2 |
753 | jb sfc_error |
756 | jb sfc_error |
754 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
757 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
755 | ja sfc_error |
758 | ja sfc_error |
756 | cmp [ebp+FAT.fs_type], 12 |
759 | cmp [ebp+FAT.fs_type], 12 |
757 | je set_FAT12 |
760 | je set_FAT12 |
758 | cmp [ebp+FAT.fs_type], 16 |
761 | cmp [ebp+FAT.fs_type], 16 |
759 | je sfc_1 |
762 | je sfc_1 |
760 | add eax, eax |
763 | add eax, eax |
761 | sfc_1: |
764 | sfc_1: |
762 | add eax, eax |
765 | add eax, eax |
763 | mov esi, 511 |
766 | mov esi, 511 |
764 | and esi, eax ; esi = position in fat sector |
767 | and esi, eax ; esi = position in fat sector |
765 | shr eax, 9 ; eax = fat sector |
768 | shr eax, 9 ; eax = fat sector |
766 | add eax, [ebp+FAT.FAT_START] |
769 | add eax, [ebp+FAT.FAT_START] |
767 | mov ebx, [ebp+FAT.fat_cache_ptr] |
770 | mov ebx, [ebp+FAT.fat_cache_ptr] |
768 | 771 | ||
769 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
772 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
770 | je sfc_in_cache ; yes |
773 | je sfc_in_cache ; yes |
771 | 774 | ||
772 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
775 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
773 | je sfc_no_change ; no |
776 | je sfc_no_change ; no |
774 | call write_fat_sector; yes. write it into disk |
777 | call write_fat_sector; yes. write it into disk |
775 | jc sfc_error |
778 | jc sfc_error |
776 | 779 | ||
777 | sfc_no_change: |
780 | sfc_no_change: |
778 | mov [ebp+FAT.fat_in_cache], eax; save fat sector |
781 | mov [ebp+FAT.fat_in_cache], eax; save fat sector |
779 | call fs_read32_sys |
782 | call fs_read32_sys |
780 | test eax, eax |
783 | test eax, eax |
781 | jne sfc_error |
784 | jne sfc_error |
782 | 785 | ||
783 | 786 | ||
784 | sfc_in_cache: |
787 | sfc_in_cache: |
785 | cmp [ebp+FAT.fs_type], 16 |
788 | cmp [ebp+FAT.fs_type], 16 |
786 | jne sfc_test32 |
789 | jne sfc_test32 |
787 | 790 | ||
788 | sfc_set16: |
791 | sfc_set16: |
789 | xchg [ebx+esi], dx ; save new value and get old value |
792 | xchg [ebx+esi], dx ; save new value and get old value |
790 | jmp sfc_write |
793 | jmp sfc_write |
791 | 794 | ||
792 | sfc_test32: |
795 | sfc_test32: |
793 | mov eax, [ebp+FAT.fatMASK] |
796 | mov eax, [ebp+FAT.fatMASK] |
794 | 797 | ||
795 | sfc_set32: |
798 | sfc_set32: |
796 | and edx, eax |
799 | and edx, eax |
797 | xor eax, -1 ; mask for high bits |
800 | xor eax, -1 ; mask for high bits |
798 | and eax, [ebx+esi] ; get high 4 bits |
801 | and eax, [ebx+esi] ; get high 4 bits |
799 | or eax, edx |
802 | or eax, edx |
800 | mov edx, [ebx+esi] ; get old value |
803 | mov edx, [ebx+esi] ; get old value |
801 | mov [ebx+esi], eax ; save new value |
804 | mov [ebx+esi], eax ; save new value |
802 | 805 | ||
803 | sfc_write: |
806 | sfc_write: |
804 | mov [ebp+FAT.fat_change], 1; fat has changed |
807 | mov [ebp+FAT.fat_change], 1; fat has changed |
805 | 808 | ||
806 | sfc_nonzero: |
809 | sfc_nonzero: |
807 | and edx, [ebp+FAT.fatMASK] |
810 | and edx, [ebp+FAT.fatMASK] |
808 | 811 | ||
809 | sfc_return: |
812 | sfc_return: |
810 | pop esi ebx eax |
813 | pop esi ebx eax |
811 | ret |
814 | ret |
812 | sfc_error: |
815 | sfc_error: |
813 | stc |
816 | stc |
814 | jmp sfc_return |
817 | jmp sfc_return |
815 | 818 | ||
816 | set_FAT12: |
819 | set_FAT12: |
817 | test edx, 0xF000 |
820 | test edx, 0xF000 |
818 | jnz sfc_error |
821 | jnz sfc_error |
819 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
822 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
820 | xchg [ebx+eax*2], dx |
823 | xchg [ebx+eax*2], dx |
821 | mov [ebp+FAT.fat_change], 1 |
824 | mov [ebp+FAT.fat_change], 1 |
822 | pop esi ebx eax |
825 | pop esi ebx eax |
823 | clc |
826 | clc |
824 | ret |
827 | ret |
825 | 828 | ||
826 | get_FAT: |
829 | get_FAT: |
827 | ;-------------------------------- |
830 | ;-------------------------------- |
828 | ; input : EAX = cluster |
831 | ; input : EAX = cluster |
829 | ; EBP = pointer to FAT structure |
832 | ; EBP = pointer to FAT structure |
830 | ; output : EAX = next cluster |
833 | ; output : EAX = next cluster |
831 | ;-------------------------------- |
834 | ;-------------------------------- |
832 | ; out: CF set <=> error |
835 | ; out: CF set <=> error |
833 | push ebx esi |
836 | push ebx esi |
834 | 837 | ||
835 | cmp [ebp+FAT.fs_type], 12 |
838 | cmp [ebp+FAT.fs_type], 12 |
836 | je get_FAT12 |
839 | je get_FAT12 |
837 | 840 | ||
838 | cmp [ebp+FAT.fs_type], 16 |
841 | cmp [ebp+FAT.fs_type], 16 |
839 | je gfc_1 |
842 | je gfc_1 |
840 | add eax, eax |
843 | add eax, eax |
841 | gfc_1: |
844 | gfc_1: |
842 | add eax, eax |
845 | add eax, eax |
843 | mov esi, 511 |
846 | mov esi, 511 |
844 | and esi, eax ; esi = position in fat sector |
847 | and esi, eax ; esi = position in fat sector |
845 | shr eax, 9 ; eax = fat sector |
848 | shr eax, 9 ; eax = fat sector |
846 | add eax, [ebp+FAT.FAT_START] |
849 | add eax, [ebp+FAT.FAT_START] |
847 | mov ebx, [ebp+FAT.fat_cache_ptr] |
850 | mov ebx, [ebp+FAT.fat_cache_ptr] |
848 | 851 | ||
849 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
852 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
850 | je gfc_in_cache |
853 | je gfc_in_cache |
851 | 854 | ||
852 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
855 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
853 | je gfc_no_change ; no |
856 | je gfc_no_change ; no |
854 | call write_fat_sector; yes. write it into disk |
857 | call write_fat_sector; yes. write it into disk |
855 | jc hd_error_01 |
858 | jc hd_error_01 |
856 | 859 | ||
857 | gfc_no_change: |
860 | gfc_no_change: |
858 | mov [ebp+FAT.fat_in_cache], eax |
861 | mov [ebp+FAT.fat_in_cache], eax |
859 | call fs_read32_sys |
862 | call fs_read32_sys |
860 | test eax, eax |
863 | test eax, eax |
861 | jne hd_error_01 |
864 | jne hd_error_01 |
862 | 865 | ||
863 | gfc_in_cache: |
866 | gfc_in_cache: |
864 | mov eax, [ebx+esi] |
867 | mov eax, [ebx+esi] |
865 | and eax, [ebp+FAT.fatMASK] |
868 | and eax, [ebp+FAT.fatMASK] |
866 | gfc_return: |
869 | gfc_return: |
867 | pop esi ebx |
870 | pop esi ebx |
868 | ret |
871 | ret |
869 | hd_error_01: |
872 | hd_error_01: |
870 | stc |
873 | stc |
871 | jmp gfc_return |
874 | jmp gfc_return |
872 | 875 | ||
873 | get_FAT12: |
876 | get_FAT12: |
874 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
877 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
875 | movzx eax, word [ebx+eax*2] |
878 | movzx eax, word [ebx+eax*2] |
876 | pop esi ebx |
879 | pop esi ebx |
877 | clc |
880 | clc |
878 | ret |
881 | ret |
879 | 882 | ||
880 | 883 | ||
881 | get_free_FAT: |
884 | get_free_FAT: |
882 | ;----------------------------------------------------------- |
885 | ;----------------------------------------------------------- |
883 | ; output : if CARRY=0 EAX = # first cluster found free |
886 | ; output : if CARRY=0 EAX = # first cluster found free |
884 | ; if CARRY=1 disk full |
887 | ; if CARRY=1 disk full |
885 | ; Note : for more speed need to use fat_cache directly |
888 | ; Note : for more speed need to use fat_cache directly |
886 | ;----------------------------------------------------------- |
889 | ;----------------------------------------------------------- |
887 | push ecx |
890 | push ecx |
888 | mov ecx, [ebp+FAT.LAST_CLUSTER]; counter for full disk |
891 | mov ecx, [ebp+FAT.LAST_CLUSTER]; counter for full disk |
889 | mov eax, [ebp+FAT.fatStartScan] |
892 | mov eax, [ebp+FAT.fatStartScan] |
890 | cmp [ebp+FAT.fs_type], 12 |
893 | cmp [ebp+FAT.fs_type], 12 |
891 | jz get_free_FAT12 |
894 | jz get_free_FAT12 |
892 | dec ecx |
895 | dec ecx |
893 | cmp eax, 2 |
896 | cmp eax, 2 |
894 | jb gff_reset |
897 | jb gff_reset |
895 | 898 | ||
896 | gff_test: |
899 | gff_test: |
897 | cmp eax, [ebp+FAT.LAST_CLUSTER]; if above last cluster start at cluster 2 |
900 | cmp eax, [ebp+FAT.LAST_CLUSTER]; if above last cluster start at cluster 2 |
898 | jbe gff_in_range |
901 | jbe gff_in_range |
899 | gff_reset: |
902 | gff_reset: |
900 | mov eax, 2 |
903 | mov eax, 2 |
901 | 904 | ||
902 | gff_in_range: |
905 | gff_in_range: |
903 | push eax |
906 | push eax |
904 | call get_FAT ; get cluster state |
907 | call get_FAT ; get cluster state |
905 | jc gff_not_found_1 |
908 | jc gff_not_found_1 |
906 | 909 | ||
907 | test eax, eax ; is it free? |
910 | test eax, eax ; is it free? |
908 | pop eax |
911 | pop eax |
909 | je gff_found ; yes |
912 | je gff_found ; yes |
910 | inc eax ; next cluster |
913 | inc eax ; next cluster |
911 | dec ecx ; is all checked? |
914 | dec ecx ; is all checked? |
912 | jnz gff_test ; no |
915 | jnz gff_test ; no |
913 | 916 | ||
914 | gff_not_found: |
917 | gff_not_found: |
915 | pop ecx ; yes. disk is full |
918 | pop ecx ; yes. disk is full |
916 | stc |
919 | stc |
917 | ret |
920 | ret |
918 | 921 | ||
919 | gff_not_found_1: |
922 | gff_not_found_1: |
920 | pop eax |
923 | pop eax |
921 | jmp gff_not_found |
924 | jmp gff_not_found |
922 | 925 | ||
923 | gff_found: |
926 | gff_found: |
924 | lea ecx, [eax+1] |
927 | lea ecx, [eax+1] |
925 | mov [ebp+FAT.fatStartScan], ecx |
928 | mov [ebp+FAT.fatStartScan], ecx |
926 | pop ecx |
929 | pop ecx |
927 | clc |
930 | clc |
928 | ret |
931 | ret |
929 | 932 | ||
930 | get_free_FAT12: |
933 | get_free_FAT12: |
931 | push edx edi |
934 | push edx edi |
932 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
935 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
933 | cmp eax, 2 |
936 | cmp eax, 2 |
934 | jb .reset |
937 | jb .reset |
935 | cmp eax, ecx |
938 | cmp eax, ecx |
936 | jbe @f |
939 | jbe @f |
937 | .reset: |
940 | .reset: |
938 | mov eax, 2 |
941 | mov eax, 2 |
939 | @@: |
942 | @@: |
940 | mov edx, eax |
943 | mov edx, eax |
941 | lea edi, [edi+eax*2] |
944 | lea edi, [edi+eax*2] |
942 | sub ecx, eax |
945 | sub ecx, eax |
943 | inc ecx |
946 | inc ecx |
944 | xor eax, eax |
947 | xor eax, eax |
945 | repnz scasw |
948 | repnz scasw |
946 | jz .found |
949 | jz .found |
947 | cmp edx, 2 |
950 | cmp edx, 2 |
948 | jz .notfound |
951 | jz .notfound |
949 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
952 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
950 | lea ecx, [edx-2] |
953 | lea ecx, [edx-2] |
951 | repnz scasw |
954 | repnz scasw |
952 | jnz .notfound |
955 | jnz .notfound |
953 | .found: |
956 | .found: |
954 | sub edi, [ebp+FAT.fat12_unpacked_ptr] |
957 | sub edi, [ebp+FAT.fat12_unpacked_ptr] |
955 | shr edi, 1 |
958 | shr edi, 1 |
956 | mov [ebp+FAT.fatStartScan], edi |
959 | mov [ebp+FAT.fatStartScan], edi |
957 | lea eax, [edi-1] |
960 | lea eax, [edi-1] |
958 | pop edi edx ecx |
961 | pop edi edx ecx |
959 | ret |
962 | ret |
960 | .notfound: |
963 | .notfound: |
961 | pop edi edx ecx |
964 | pop edi edx ecx |
962 | stc |
965 | stc |
963 | ret |
966 | ret |
964 | 967 | ||
965 | 968 | ||
966 | write_fat_sector: |
969 | write_fat_sector: |
967 | ;----------------------------------------------------------- |
970 | ;----------------------------------------------------------- |
968 | ; write changed fat to disk |
971 | ; write changed fat to disk |
969 | ;----------------------------------------------------------- |
972 | ;----------------------------------------------------------- |
970 | push eax ebx ecx |
973 | push eax ebx ecx |
971 | 974 | ||
972 | mov [ebp+FAT.fat_change], 0 |
975 | mov [ebp+FAT.fat_change], 0 |
973 | mov eax, [ebp+FAT.fat_in_cache] |
976 | mov eax, [ebp+FAT.fat_in_cache] |
974 | cmp eax, -1 |
977 | cmp eax, -1 |
975 | jz write_fat_not_used |
978 | jz write_fat_not_used |
976 | mov ebx, [ebp+FAT.fat_cache_ptr] |
979 | mov ebx, [ebp+FAT.fat_cache_ptr] |
977 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
980 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
978 | 981 | ||
979 | write_next_fat: |
982 | write_next_fat: |
980 | push eax |
983 | push eax |
981 | call fs_write32_sys |
984 | call fs_write32_sys |
982 | test eax, eax |
985 | test eax, eax |
983 | pop eax |
986 | pop eax |
984 | jnz write_fat_not_used |
987 | jnz write_fat_not_used |
985 | 988 | ||
986 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
989 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
987 | dec ecx |
990 | dec ecx |
988 | jnz write_next_fat |
991 | jnz write_next_fat |
989 | 992 | ||
990 | write_fat_not_used: |
993 | write_fat_not_used: |
991 | pop ecx ebx eax |
994 | pop ecx ebx eax |
992 | ret |
995 | ret |
993 | 996 | ||
994 | 997 | ||
995 | 998 | ||
996 | 999 | ||
997 | 1000 | ||
998 | bcd2bin: |
1001 | bcd2bin: |
999 | ;---------------------------------- |
1002 | ;---------------------------------- |
1000 | ; input : AL=BCD number (eg. 0x11) |
1003 | ; input : AL=BCD number (eg. 0x11) |
1001 | ; output : AH=0 |
1004 | ; output : AH=0 |
1002 | ; AL=decimal number (eg. 11) |
1005 | ; AL=decimal number (eg. 11) |
1003 | ;---------------------------------- |
1006 | ;---------------------------------- |
1004 | xor ah, ah |
1007 | xor ah, ah |
1005 | shl ax, 4 |
1008 | shl ax, 4 |
1006 | shr al, 4 |
1009 | shr al, 4 |
1007 | aad |
1010 | aad |
1008 | ret |
1011 | ret |
1009 | 1012 | ||
1010 | 1013 | ||
1011 | get_date_for_file: |
1014 | get_date_for_file: |
1012 | ;----------------------------------------------------- |
1015 | ;----------------------------------------------------- |
1013 | ; Get date from CMOS and pack day,month,year in AX |
1016 | ; Get date from CMOS and pack day,month,year in AX |
1014 | ; DATE bits 0..4 : day of month 0..31 |
1017 | ; DATE bits 0..4 : day of month 0..31 |
1015 | ; 5..8 : month of year 1..12 |
1018 | ; 5..8 : month of year 1..12 |
1016 | ; 9..15 : count of years from 1980 |
1019 | ; 9..15 : count of years from 1980 |
1017 | ;----------------------------------------------------- |
1020 | ;----------------------------------------------------- |
1018 | mov al, 0x7 ;day |
1021 | mov al, 0x7 ;day |
1019 | out 0x70, al |
1022 | out 0x70, al |
1020 | in al, 0x71 |
1023 | in al, 0x71 |
1021 | call bcd2bin |
1024 | call bcd2bin |
1022 | ror eax, 5 |
1025 | ror eax, 5 |
1023 | 1026 | ||
1024 | mov al, 0x8 ;month |
1027 | mov al, 0x8 ;month |
1025 | out 0x70, al |
1028 | out 0x70, al |
1026 | in al, 0x71 |
1029 | in al, 0x71 |
1027 | call bcd2bin |
1030 | call bcd2bin |
1028 | ror eax, 4 |
1031 | ror eax, 4 |
1029 | 1032 | ||
1030 | mov al, 0x9 ;year |
1033 | mov al, 0x9 ;year |
1031 | out 0x70, al |
1034 | out 0x70, al |
1032 | in al, 0x71 |
1035 | in al, 0x71 |
1033 | call bcd2bin |
1036 | call bcd2bin |
1034 | add ax, 20 ;because CMOS return only the two last |
1037 | add ax, 20 ;because CMOS return only the two last |
1035 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
1038 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
1036 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
1039 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
1037 | ret |
1040 | ret |
1038 | 1041 | ||
1039 | 1042 | ||
1040 | get_time_for_file: |
1043 | get_time_for_file: |
1041 | ;----------------------------------------------------- |
1044 | ;----------------------------------------------------- |
1042 | ; Get time from CMOS and pack hour,minute,second in AX |
1045 | ; Get time from CMOS and pack hour,minute,second in AX |
1043 | ; TIME bits 0..4 : second (the low bit is lost) |
1046 | ; TIME bits 0..4 : second (the low bit is lost) |
1044 | ; 5..10 : minute 0..59 |
1047 | ; 5..10 : minute 0..59 |
1045 | ; 11..15 : hour 0..23 |
1048 | ; 11..15 : hour 0..23 |
1046 | ;----------------------------------------------------- |
1049 | ;----------------------------------------------------- |
1047 | mov al, 0x0 ;second |
1050 | mov al, 0x0 ;second |
1048 | out 0x70, al |
1051 | out 0x70, al |
1049 | in al, 0x71 |
1052 | in al, 0x71 |
1050 | call bcd2bin |
1053 | call bcd2bin |
1051 | ror eax, 6 |
1054 | ror eax, 6 |
1052 | 1055 | ||
1053 | mov al, 0x2 ;minute |
1056 | mov al, 0x2 ;minute |
1054 | out 0x70, al |
1057 | out 0x70, al |
1055 | in al, 0x71 |
1058 | in al, 0x71 |
1056 | call bcd2bin |
1059 | call bcd2bin |
1057 | ror eax, 6 |
1060 | ror eax, 6 |
1058 | 1061 | ||
1059 | mov al, 0x4 ;hour |
1062 | mov al, 0x4 ;hour |
1060 | out 0x70, al |
1063 | out 0x70, al |
1061 | in al, 0x71 |
1064 | in al, 0x71 |
1062 | call bcd2bin |
1065 | call bcd2bin |
1063 | rol eax, 11 |
1066 | rol eax, 11 |
1064 | ret |
1067 | ret |
1065 | 1068 | ||
1066 | 1069 | ||
1067 | set_current_time_for_entry: |
1070 | set_current_time_for_entry: |
1068 | ;----------------------------------------------------- |
1071 | ;----------------------------------------------------- |
1069 | ; Set current time/date for file entry |
1072 | ; Set current time/date for file entry |
1070 | ; input : ebx = file entry pointer |
1073 | ; input : ebx = file entry pointer |
1071 | ;----------------------------------------------------- |
1074 | ;----------------------------------------------------- |
1072 | push eax |
1075 | push eax |
1073 | call get_time_for_file; update files date/time |
1076 | call get_time_for_file; update files date/time |
1074 | mov [ebx+22], ax |
1077 | mov [ebx+22], ax |
1075 | call get_date_for_file |
1078 | call get_date_for_file |
1076 | mov [ebx+24], ax |
1079 | mov [ebx+24], ax |
1077 | pop eax |
1080 | pop eax |
1078 | ret |
1081 | ret |
1079 | 1082 | ||
1080 | 1083 | ||
1081 | 1084 | ||
1082 | add_disk_free_space: |
1085 | add_disk_free_space: |
1083 | ;----------------------------------------------------- |
1086 | ;----------------------------------------------------- |
1084 | ; input : ecx = cluster count |
1087 | ; input : ecx = cluster count |
1085 | ; Note : negative = remove clusters from free space |
1088 | ; Note : negative = remove clusters from free space |
1086 | ; positive = add clusters to free space |
1089 | ; positive = add clusters to free space |
1087 | ;----------------------------------------------------- |
1090 | ;----------------------------------------------------- |
1088 | test ecx, ecx ; no change |
1091 | test ecx, ecx ; no change |
1089 | je add_dfs_no |
1092 | je add_dfs_no |
1090 | cmp [ebp+FAT.fs_type], 32 ; free disk space only used by fat32 |
1093 | cmp [ebp+FAT.fs_type], 32 ; free disk space only used by fat32 |
1091 | jne add_dfs_no |
1094 | jne add_dfs_no |
1092 | 1095 | ||
1093 | push eax ebx |
1096 | push eax ebx |
1094 | mov eax, [ebp+FAT.ADR_FSINFO] |
1097 | mov eax, [ebp+FAT.ADR_FSINFO] |
1095 | lea ebx, [ebp+FAT.fsinfo_buffer] |
1098 | lea ebx, [ebp+FAT.fsinfo_buffer] |
1096 | call fs_read32_sys |
1099 | call fs_read32_sys |
1097 | test eax, eax |
1100 | test eax, eax |
1098 | jnz add_not_fs |
1101 | jnz add_not_fs |
1099 | 1102 | ||
1100 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
1103 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
1101 | jne add_not_fs |
1104 | jne add_not_fs |
1102 | 1105 | ||
1103 | add [ebx+0x1e8], ecx |
1106 | add [ebx+0x1e8], ecx |
1104 | push [ebp+FAT.fatStartScan] |
1107 | push [ebp+FAT.fatStartScan] |
1105 | pop dword [ebx+0x1ec] |
1108 | pop dword [ebx+0x1ec] |
1106 | mov eax, [ebp+FAT.ADR_FSINFO] |
1109 | mov eax, [ebp+FAT.ADR_FSINFO] |
1107 | call fs_write32_sys |
1110 | call fs_write32_sys |
1108 | ; jc add_not_fs |
1111 | ; jc add_not_fs |
1109 | 1112 | ||
1110 | add_not_fs: |
1113 | add_not_fs: |
1111 | pop ebx eax |
1114 | pop ebx eax |
1112 | 1115 | ||
1113 | add_dfs_no: |
1116 | add_dfs_no: |
1114 | ret |
1117 | ret |
1115 | 1118 | ||
1116 | 1119 | ||
1117 | 1120 | ||
1118 | clear_cluster_chain: |
1121 | clear_cluster_chain: |
1119 | ;----------------------------------------------------- |
1122 | ;----------------------------------------------------- |
1120 | ; input : eax = first cluster |
1123 | ; input : eax = first cluster |
1121 | ;----------------------------------------------------- |
1124 | ;----------------------------------------------------- |
1122 | push eax ecx edx |
1125 | push eax ecx edx |
1123 | xor ecx, ecx ; cluster count |
1126 | xor ecx, ecx ; cluster count |
1124 | 1127 | ||
1125 | clean_new_chain: |
1128 | clean_new_chain: |
1126 | cmp eax, [ebp+FAT.LAST_CLUSTER]; end of file |
1129 | cmp eax, [ebp+FAT.LAST_CLUSTER]; end of file |
1127 | ja delete_OK |
1130 | ja delete_OK |
1128 | cmp eax, 2 ; unfinished fat chain or zero length file |
1131 | cmp eax, 2 ; unfinished fat chain or zero length file |
1129 | jb delete_OK |
1132 | jb delete_OK |
1130 | cmp eax, [ebp+FAT.ROOT_CLUSTER]; don't remove root cluster |
1133 | cmp eax, [ebp+FAT.ROOT_CLUSTER]; don't remove root cluster |
1131 | jz delete_OK |
1134 | jz delete_OK |
1132 | 1135 | ||
1133 | xor edx, edx |
1136 | xor edx, edx |
1134 | call set_FAT ; clear fat entry |
1137 | call set_FAT ; clear fat entry |
1135 | jc access_denied_01 |
1138 | jc access_denied_01 |
1136 | 1139 | ||
1137 | inc ecx ; update cluster count |
1140 | inc ecx ; update cluster count |
1138 | mov eax, edx ; old cluster |
1141 | mov eax, edx ; old cluster |
1139 | jmp clean_new_chain |
1142 | jmp clean_new_chain |
1140 | 1143 | ||
1141 | delete_OK: |
1144 | delete_OK: |
1142 | call add_disk_free_space; add clusters to free disk space |
1145 | call add_disk_free_space; add clusters to free disk space |
1143 | clc |
1146 | clc |
1144 | access_denied_01: |
1147 | access_denied_01: |
1145 | pop edx ecx eax |
1148 | pop edx ecx eax |
1146 | ret |
1149 | ret |
1147 | 1150 | ||
1148 | 1151 | ||
1149 | if 0 |
1152 | if 0 |
1150 | get_hd_info: |
1153 | get_hd_info: |
1151 | ;----------------------------------------------------------- |
1154 | ;----------------------------------------------------------- |
1152 | ; output : eax = 0 - ok |
1155 | ; output : eax = 0 - ok |
1153 | ; 3 - unknown FS |
1156 | ; 3 - unknown FS |
1154 | ; 10 - access denied |
1157 | ; 10 - access denied |
1155 | ; edx = cluster size in bytes |
1158 | ; edx = cluster size in bytes |
1156 | ; ebx = total clusters on disk |
1159 | ; ebx = total clusters on disk |
1157 | ; ecx = free clusters on disk |
1160 | ; ecx = free clusters on disk |
1158 | ;----------------------------------------------------------- |
1161 | ;----------------------------------------------------------- |
1159 | cmp [ebp+FAT.fs_type], 16 |
1162 | cmp [ebp+FAT.fs_type], 16 |
1160 | jz info_fat_ok |
1163 | jz info_fat_ok |
1161 | cmp [ebp+FAT.fs_type], 32 |
1164 | cmp [ebp+FAT.fs_type], 32 |
1162 | jz info_fat_ok |
1165 | jz info_fat_ok |
1163 | xor edx, edx |
1166 | xor edx, edx |
1164 | xor ebx, ebx |
1167 | xor ebx, ebx |
1165 | xor ecx, ecx |
1168 | xor ecx, ecx |
1166 | mov eax, ERROR_UNKNOWN_FS |
1169 | mov eax, ERROR_UNKNOWN_FS |
1167 | ret |
1170 | ret |
1168 | 1171 | ||
1169 | info_fat_ok: |
1172 | info_fat_ok: |
1170 | ; call reserve_hd1 |
1173 | ; call reserve_hd1 |
1171 | 1174 | ||
1172 | xor ecx, ecx ; count of free clusters |
1175 | xor ecx, ecx ; count of free clusters |
1173 | mov eax, 2 |
1176 | mov eax, 2 |
1174 | mov ebx, [ebp+FAT.LAST_CLUSTER] |
1177 | mov ebx, [ebp+FAT.LAST_CLUSTER] |
1175 | 1178 | ||
1176 | info_cluster: |
1179 | info_cluster: |
1177 | push eax |
1180 | push eax |
1178 | call get_FAT ; get cluster info |
1181 | call get_FAT ; get cluster info |
1179 | jc info_access_denied |
1182 | jc info_access_denied |
1180 | 1183 | ||
1181 | test eax, eax ; is it free? |
1184 | test eax, eax ; is it free? |
1182 | jnz info_used ; no |
1185 | jnz info_used ; no |
1183 | inc ecx |
1186 | inc ecx |
1184 | 1187 | ||
1185 | info_used: |
1188 | info_used: |
1186 | pop eax |
1189 | pop eax |
1187 | inc eax |
1190 | inc eax |
1188 | cmp eax, ebx ; is above last cluster? |
1191 | cmp eax, ebx ; is above last cluster? |
1189 | jbe info_cluster ; no. test next cluster |
1192 | jbe info_cluster ; no. test next cluster |
1190 | 1193 | ||
1191 | dec ebx ; cluster count |
1194 | dec ebx ; cluster count |
1192 | imul edx, [ebp+FAT.SECTORS_PER_CLUSTER], 512; cluster size in bytes |
1195 | imul edx, [ebp+FAT.SECTORS_PER_CLUSTER], 512; cluster size in bytes |
1193 | xor eax, eax |
1196 | xor eax, eax |
1194 | ret |
1197 | ret |
1195 | 1198 | ||
1196 | info_access_denied: |
1199 | info_access_denied: |
1197 | add esp, 4 |
1200 | add esp, 4 |
1198 | xor edx, edx |
1201 | xor edx, edx |
1199 | xor ebx, ebx |
1202 | xor ebx, ebx |
1200 | xor ecx, ecx |
1203 | xor ecx, ecx |
1201 | mov eax, ERROR_ACCESS_DENIED |
1204 | mov eax, ERROR_ACCESS_DENIED |
1202 | ret |
1205 | ret |
1203 | end if |
1206 | end if |
1204 | 1207 | ||
1205 | update_disk: |
1208 | update_disk: |
1206 | cmp [ebp+FAT.fat_change], 0 ; is fat changed? |
1209 | cmp [ebp+FAT.fat_change], 0 ; is fat changed? |
1207 | je upd_no_change |
1210 | je upd_no_change |
1208 | cmp [ebp+FAT.fs_type], 12 |
1211 | cmp [ebp+FAT.fs_type], 12 |
1209 | jz .fat12 |
1212 | jz .fat12 |
1210 | ;----------------------------------------------------------- |
1213 | ;----------------------------------------------------------- |
1211 | ; write changed fat and cache to disk |
1214 | ; write changed fat and cache to disk |
1212 | ;----------------------------------------------------------- |
1215 | ;----------------------------------------------------------- |
1213 | 1216 | ||
1214 | call write_fat_sector |
1217 | call write_fat_sector |
1215 | jc update_disk_acces_denied |
1218 | jc update_disk_acces_denied |
1216 | jmp upd_no_change |
1219 | jmp upd_no_change |
1217 | .fat12: |
1220 | .fat12: |
1218 | call restorefatchain |
1221 | call restorefatchain |
1219 | mov [ebp+FAT.fat_change], 0 |
1222 | mov [ebp+FAT.fat_change], 0 |
1220 | 1223 | ||
1221 | upd_no_change: |
1224 | upd_no_change: |
1222 | 1225 | ||
1223 | push esi |
1226 | push esi |
1224 | mov esi, [ebp+PARTITION.Disk] |
1227 | mov esi, [ebp+PARTITION.Disk] |
1225 | call disk_sync |
1228 | call disk_sync |
1226 | pop esi |
1229 | pop esi |
1227 | update_disk_acces_denied: |
1230 | update_disk_acces_denied: |
1228 | ret |
1231 | ret |
1229 | 1232 | ||
1230 | fat_lock: |
1233 | fat_lock: |
1231 | lea ecx, [ebp+FAT.Lock] |
1234 | lea ecx, [ebp+FAT.Lock] |
1232 | jmp mutex_lock |
1235 | jmp mutex_lock |
1233 | fat_unlock: |
1236 | fat_unlock: |
1234 | lea ecx, [ebp+FAT.Lock] |
1237 | lea ecx, [ebp+FAT.Lock] |
1235 | jmp mutex_unlock |
1238 | jmp mutex_unlock |
1236 | 1239 | ||
1237 | ; \begin{diamond} |
1240 | ; \begin{diamond} |
1238 | uni2ansi_str: |
1241 | uni2ansi_str: |
1239 | ; convert UNICODE zero-terminated string to ASCII-string (codepage 866) |
1242 | ; convert UNICODE zero-terminated string to ASCII-string (codepage 866) |
1240 | ; in: esi->source, edi->buffer (may be esi=edi) |
1243 | ; in: esi->source, edi->buffer (may be esi=edi) |
1241 | ; destroys: eax,esi,edi |
1244 | ; destroys: eax,esi,edi |
1242 | lodsw |
1245 | lodsw |
1243 | test ax, ax |
1246 | test ax, ax |
1244 | jz .done |
1247 | jz .done |
1245 | cmp ax, 0x80 |
1248 | cmp ax, 0x80 |
1246 | jb .ascii |
1249 | jb .ascii |
1247 | cmp ax, 0x401 |
1250 | cmp ax, 0x401 |
1248 | jz .yo1 |
1251 | jz .yo1 |
1249 | cmp ax, 0x451 |
1252 | cmp ax, 0x451 |
1250 | jz .yo2 |
1253 | jz .yo2 |
1251 | cmp ax, 0x410 |
1254 | cmp ax, 0x410 |
1252 | jb .unk |
1255 | jb .unk |
1253 | cmp ax, 0x440 |
1256 | cmp ax, 0x440 |
1254 | jb .rus1 |
1257 | jb .rus1 |
1255 | cmp ax, 0x450 |
1258 | cmp ax, 0x450 |
1256 | jb .rus2 |
1259 | jb .rus2 |
1257 | .unk: |
1260 | .unk: |
1258 | mov al, '_' |
1261 | mov al, '_' |
1259 | jmp .doit |
1262 | jmp .doit |
1260 | .yo1: |
1263 | .yo1: |
1261 | mov al, 0xF0 ; 'Ё' |
1264 | mov al, 0xF0 ; 'Ё' |
1262 | jmp .doit |
1265 | jmp .doit |
1263 | .yo2: |
1266 | .yo2: |
1264 | mov al, 0xF1 ; 'ё' |
1267 | mov al, 0xF1 ; 'ё' |
1265 | jmp .doit |
1268 | jmp .doit |
1266 | .rus1: |
1269 | .rus1: |
1267 | ; 0x410-0x43F -> 0x80-0xAF |
1270 | ; 0x410-0x43F -> 0x80-0xAF |
1268 | add al, 0x70 |
1271 | add al, 0x70 |
1269 | jmp .doit |
1272 | jmp .doit |
1270 | .rus2: |
1273 | .rus2: |
1271 | ; 0x440-0x44F -> 0xE0-0xEF |
1274 | ; 0x440-0x44F -> 0xE0-0xEF |
1272 | add al, 0xA0 |
1275 | add al, 0xA0 |
1273 | .ascii: |
1276 | .ascii: |
1274 | .doit: |
1277 | .doit: |
1275 | stosb |
1278 | stosb |
1276 | jmp uni2ansi_str |
1279 | jmp uni2ansi_str |
1277 | .done: |
1280 | .done: |
1278 | mov byte [edi], 0 |
1281 | mov byte [edi], 0 |
1279 | ret |
1282 | ret |
1280 | 1283 | ||
1281 | ansi2uni_char: |
1284 | ansi2uni_char: |
1282 | ; convert ANSI character in al to UNICODE character in ax, using cp866 encoding |
1285 | ; convert ANSI character in al to UNICODE character in ax, using cp866 encoding |
1283 | mov ah, 0 |
1286 | mov ah, 0 |
1284 | ; 0x00-0x7F - trivial map |
1287 | ; 0x00-0x7F - trivial map |
1285 | cmp al, 0x80 |
1288 | cmp al, 0x80 |
1286 | jb .ret |
1289 | jb .ret |
1287 | ; 0x80-0xAF -> 0x410-0x43F |
1290 | ; 0x80-0xAF -> 0x410-0x43F |
1288 | cmp al, 0xB0 |
1291 | cmp al, 0xB0 |
1289 | jae @f |
1292 | jae @f |
1290 | add ax, 0x410-0x80 |
1293 | add ax, 0x410-0x80 |
1291 | .ret: |
1294 | .ret: |
1292 | ret |
1295 | ret |
1293 | @@: |
1296 | @@: |
1294 | ; 0xE0-0xEF -> 0x440-0x44F |
1297 | ; 0xE0-0xEF -> 0x440-0x44F |
1295 | cmp al, 0xE0 |
1298 | cmp al, 0xE0 |
1296 | jb .unk |
1299 | jb .unk |
1297 | cmp al, 0xF0 |
1300 | cmp al, 0xF0 |
1298 | jae @f |
1301 | jae @f |
1299 | add ax, 0x440-0xE0 |
1302 | add ax, 0x440-0xE0 |
1300 | ret |
1303 | ret |
1301 | ; 0xF0 -> 0x401 |
1304 | ; 0xF0 -> 0x401 |
1302 | ; 0xF1 -> 0x451 |
1305 | ; 0xF1 -> 0x451 |
1303 | @@: |
1306 | @@: |
1304 | cmp al, 0xF0 ; 'Ё' |
1307 | cmp al, 0xF0 ; 'Ё' |
1305 | jz .yo1 |
1308 | jz .yo1 |
1306 | cmp al, 0xF1 ; 'ё' |
1309 | cmp al, 0xF1 ; 'ё' |
1307 | jz .yo2 |
1310 | jz .yo2 |
1308 | .unk: |
1311 | .unk: |
1309 | mov al, '_' ; ah=0 |
1312 | mov al, '_' ; ah=0 |
1310 | ret |
1313 | ret |
1311 | .yo1: |
1314 | .yo1: |
1312 | mov ax, 0x401 |
1315 | mov ax, 0x401 |
1313 | ret |
1316 | ret |
1314 | .yo2: |
1317 | .yo2: |
1315 | mov ax, 0x451 |
1318 | mov ax, 0x451 |
1316 | ret |
1319 | ret |
1317 | 1320 | ||
1318 | char_toupper: |
1321 | char_toupper: |
1319 | ; convert character to uppercase, using cp866 encoding |
1322 | ; convert character to uppercase, using cp866 encoding |
1320 | ; in: al=symbol |
1323 | ; in: al=symbol |
1321 | ; out: al=converted symbol |
1324 | ; out: al=converted symbol |
1322 | cmp al, 'a' |
1325 | cmp al, 'a' |
1323 | jb .ret |
1326 | jb .ret |
1324 | cmp al, 'z' |
1327 | cmp al, 'z' |
1325 | jbe .az |
1328 | jbe .az |
1326 | cmp al, 0xF1 ; 'ё' |
1329 | cmp al, 0xF1 ; 'ё' |
1327 | jz .yo1 |
1330 | jz .yo1 |
1328 | cmp al, 0xA0 ; 'а' |
1331 | cmp al, 0xA0 ; 'а' |
1329 | jb .ret |
1332 | jb .ret |
1330 | cmp al, 0xE0 ; 'р' |
1333 | cmp al, 0xE0 ; 'р' |
1331 | jb .rus1 |
1334 | jb .rus1 |
1332 | cmp al, 0xEF ; 'я' |
1335 | cmp al, 0xEF ; 'я' |
1333 | ja .ret |
1336 | ja .ret |
1334 | ; 0xE0-0xEF -> 0x90-0x9F |
1337 | ; 0xE0-0xEF -> 0x90-0x9F |
1335 | sub al, 0xE0-0x90 |
1338 | sub al, 0xE0-0x90 |
1336 | .ret: |
1339 | .ret: |
1337 | ret |
1340 | ret |
1338 | .rus1: |
1341 | .rus1: |
1339 | ; 0xA0-0xAF -> 0x80-0x8F |
1342 | ; 0xA0-0xAF -> 0x80-0x8F |
1340 | .az: |
1343 | .az: |
1341 | and al, not 0x20 |
1344 | and al, not 0x20 |
1342 | ret |
1345 | ret |
1343 | .yo1: |
1346 | .yo1: |
1344 | ; 0xF1 -> 0xF0 |
1347 | ; 0xF1 -> 0xF0 |
1345 | dec ax |
1348 | dec ax |
1346 | ret |
1349 | ret |
1347 | 1350 | ||
1348 | fat_get_name: |
1351 | fat_get_name: |
1349 | ; in: edi->FAT entry |
1352 | ; in: edi->FAT entry |
1350 | ; out: CF=1 - no valid entry |
1353 | ; out: CF=1 - no valid entry |
1351 | ; else CF=0 and ebp->ASCIIZ-name |
1354 | ; else CF=0 and ebp->ASCIIZ-name |
1352 | ; (maximum length of filename is 255 (wide) symbols without trailing 0, |
1355 | ; (maximum length of filename is 255 (wide) symbols without trailing 0, |
1353 | ; but implementation requires buffer 261 words) |
1356 | ; but implementation requires buffer 261 words) |
1354 | ; destroys eax |
1357 | ; destroys eax |
1355 | cmp byte [edi], 0 |
1358 | cmp byte [edi], 0 |
1356 | jz .no |
1359 | jz .no |
1357 | cmp byte [edi], 0xE5 |
1360 | cmp byte [edi], 0xE5 |
1358 | jnz @f |
1361 | jnz @f |
1359 | .no: |
1362 | .no: |
1360 | stc |
1363 | stc |
1361 | ret |
1364 | ret |
1362 | @@: |
1365 | @@: |
1363 | cmp byte [edi+11], 0xF |
1366 | cmp byte [edi+11], 0xF |
1364 | jz .longname |
1367 | jz .longname |
1365 | test byte [edi+11], 8 |
1368 | test byte [edi+11], 8 |
1366 | jnz .no |
1369 | jnz .no |
1367 | push ecx |
1370 | push ecx |
1368 | push edi ebp |
1371 | push edi ebp |
1369 | test byte [ebp-4], 1 |
1372 | test byte [ebp-4], 1 |
1370 | jnz .unicode_short |
1373 | jnz .unicode_short |
1371 | 1374 | ||
1372 | mov eax, [edi] |
1375 | mov eax, [edi] |
1373 | mov ecx, [edi+4] |
1376 | mov ecx, [edi+4] |
1374 | mov [ebp], eax |
1377 | mov [ebp], eax |
1375 | mov [ebp+4], ecx |
1378 | mov [ebp+4], ecx |
1376 | 1379 | ||
1377 | mov ecx, 8 |
1380 | mov ecx, 8 |
1378 | @@: |
1381 | @@: |
1379 | cmp byte [ebp+ecx-1], ' ' |
1382 | cmp byte [ebp+ecx-1], ' ' |
1380 | loope @b |
1383 | loope @b |
1381 | 1384 | ||
1382 | mov eax, [edi+8] |
1385 | mov eax, [edi+8] |
1383 | cmp al, ' ' |
1386 | cmp al, ' ' |
1384 | je .done |
1387 | je .done |
1385 | shl eax, 8 |
1388 | shl eax, 8 |
1386 | mov al, '.' |
1389 | mov al, '.' |
1387 | 1390 | ||
1388 | lea ebp, [ebp+ecx+1] |
1391 | lea ebp, [ebp+ecx+1] |
1389 | mov [ebp], eax |
1392 | mov [ebp], eax |
1390 | mov ecx, 3 |
1393 | mov ecx, 3 |
1391 | @@: |
1394 | @@: |
1392 | rol eax, 8 |
1395 | rol eax, 8 |
1393 | cmp al, ' ' |
1396 | cmp al, ' ' |
1394 | jne .done |
1397 | jne .done |
1395 | loop @b |
1398 | loop @b |
1396 | dec ebp |
1399 | dec ebp |
1397 | .done: |
1400 | .done: |
1398 | and byte [ebp+ecx+1], 0 ; CF=0 |
1401 | and byte [ebp+ecx+1], 0 ; CF=0 |
1399 | pop ebp edi ecx |
1402 | pop ebp edi ecx |
1400 | ret |
1403 | ret |
1401 | .unicode_short: |
1404 | .unicode_short: |
1402 | mov ecx, 8 |
1405 | mov ecx, 8 |
1403 | push ecx |
1406 | push ecx |
1404 | @@: |
1407 | @@: |
1405 | mov al, [edi] |
1408 | mov al, [edi] |
1406 | inc edi |
1409 | inc edi |
1407 | call ansi2uni_char |
1410 | call ansi2uni_char |
1408 | mov [ebp], ax |
1411 | mov [ebp], ax |
1409 | inc ebp |
1412 | inc ebp |
1410 | inc ebp |
1413 | inc ebp |
1411 | loop @b |
1414 | loop @b |
1412 | pop ecx |
1415 | pop ecx |
1413 | @@: |
1416 | @@: |
1414 | cmp word [ebp-2], ' ' |
1417 | cmp word [ebp-2], ' ' |
1415 | jnz @f |
1418 | jnz @f |
1416 | dec ebp |
1419 | dec ebp |
1417 | dec ebp |
1420 | dec ebp |
1418 | loop @b |
1421 | loop @b |
1419 | @@: |
1422 | @@: |
1420 | mov word [ebp], '.' |
1423 | mov word [ebp], '.' |
1421 | inc ebp |
1424 | inc ebp |
1422 | inc ebp |
1425 | inc ebp |
1423 | mov ecx, 3 |
1426 | mov ecx, 3 |
1424 | push ecx |
1427 | push ecx |
1425 | @@: |
1428 | @@: |
1426 | mov al, [edi] |
1429 | mov al, [edi] |
1427 | inc edi |
1430 | inc edi |
1428 | call ansi2uni_char |
1431 | call ansi2uni_char |
1429 | mov [ebp], ax |
1432 | mov [ebp], ax |
1430 | inc ebp |
1433 | inc ebp |
1431 | inc ebp |
1434 | inc ebp |
1432 | loop @b |
1435 | loop @b |
1433 | pop ecx |
1436 | pop ecx |
1434 | @@: |
1437 | @@: |
1435 | cmp word [ebp-2], ' ' |
1438 | cmp word [ebp-2], ' ' |
1436 | jnz @f |
1439 | jnz @f |
1437 | dec ebp |
1440 | dec ebp |
1438 | dec ebp |
1441 | dec ebp |
1439 | loop @b |
1442 | loop @b |
1440 | dec ebp |
1443 | dec ebp |
1441 | dec ebp |
1444 | dec ebp |
1442 | @@: |
1445 | @@: |
1443 | and word [ebp], 0 ; CF=0 |
1446 | and word [ebp], 0 ; CF=0 |
1444 | pop ebp edi ecx |
1447 | pop ebp edi ecx |
1445 | ret |
1448 | ret |
1446 | .longname: |
1449 | .longname: |
1447 | ; LFN |
1450 | ; LFN |
1448 | mov al, byte [edi] |
1451 | mov al, byte [edi] |
1449 | and eax, 0x3F |
1452 | and eax, 0x3F |
1450 | dec eax |
1453 | dec eax |
1451 | cmp al, 20 |
1454 | cmp al, 20 |
1452 | jae .no ; ignore invalid entries |
1455 | jae .no ; ignore invalid entries |
1453 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
1456 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
1454 | imul eax, 13*2 |
1457 | imul eax, 13*2 |
1455 | add ebp, eax |
1458 | add ebp, eax |
1456 | test byte [edi], 0x40 |
1459 | test byte [edi], 0x40 |
1457 | jz @f |
1460 | jz @f |
1458 | mov word [ebp+13*2], 0 |
1461 | mov word [ebp+13*2], 0 |
1459 | @@: |
1462 | @@: |
1460 | push eax |
1463 | push eax |
1461 | ; now copy name from edi to ebp ... |
1464 | ; now copy name from edi to ebp ... |
1462 | mov eax, [edi+1] |
1465 | mov eax, [edi+1] |
1463 | mov [ebp], eax ; symbols 1,2 |
1466 | mov [ebp], eax ; symbols 1,2 |
1464 | mov eax, [edi+5] |
1467 | mov eax, [edi+5] |
1465 | mov [ebp+4], eax ; 3,4 |
1468 | mov [ebp+4], eax ; 3,4 |
1466 | mov eax, [edi+9] |
1469 | mov eax, [edi+9] |
1467 | mov [ebp+8], ax ; 5 |
1470 | mov [ebp+8], ax ; 5 |
1468 | mov eax, [edi+14] |
1471 | mov eax, [edi+14] |
1469 | mov [ebp+10], eax ; 6,7 |
1472 | mov [ebp+10], eax ; 6,7 |
1470 | mov eax, [edi+18] |
1473 | mov eax, [edi+18] |
1471 | mov [ebp+14], eax ; 8,9 |
1474 | mov [ebp+14], eax ; 8,9 |
1472 | mov eax, [edi+22] |
1475 | mov eax, [edi+22] |
1473 | mov [ebp+18], eax ; 10,11 |
1476 | mov [ebp+18], eax ; 10,11 |
1474 | mov eax, [edi+28] |
1477 | mov eax, [edi+28] |
1475 | mov [ebp+22], eax ; 12,13 |
1478 | mov [ebp+22], eax ; 12,13 |
1476 | ; ... done |
1479 | ; ... done |
1477 | pop eax |
1480 | pop eax |
1478 | sub ebp, eax |
1481 | sub ebp, eax |
1479 | test eax, eax |
1482 | test eax, eax |
1480 | jz @f |
1483 | jz @f |
1481 | ; if this is not first entry, more processing required |
1484 | ; if this is not first entry, more processing required |
1482 | stc |
1485 | stc |
1483 | ret |
1486 | ret |
1484 | @@: |
1487 | @@: |
1485 | ; if this is first entry: |
1488 | ; if this is first entry: |
1486 | test byte [ebp-4], 1 |
1489 | test byte [ebp-4], 1 |
1487 | jnz .ret |
1490 | jnz .ret |
1488 | ; buffer at ebp contains UNICODE name, convert it to ANSI |
1491 | ; buffer at ebp contains UNICODE name, convert it to ANSI |
1489 | push esi edi |
1492 | push esi edi |
1490 | mov esi, ebp |
1493 | mov esi, ebp |
1491 | mov edi, ebp |
1494 | mov edi, ebp |
1492 | call uni2ansi_str |
1495 | call uni2ansi_str |
1493 | pop edi esi |
1496 | pop edi esi |
1494 | .ret: |
1497 | .ret: |
1495 | clc |
1498 | clc |
1496 | ret |
1499 | ret |
1497 | 1500 | ||
1498 | fat_compare_name: |
1501 | fat_compare_name: |
1499 | ; compares ASCIIZ-names, case-insensitive (cp866 encoding) |
1502 | ; compares ASCIIZ-names, case-insensitive (cp866 encoding) |
1500 | ; in: esi->name, ebp->name |
1503 | ; in: esi->name, ebp->name |
1501 | ; out: if names match: ZF=1 and esi->next component of name |
1504 | ; out: if names match: ZF=1 and esi->next component of name |
1502 | ; else: ZF=0, esi is not changed |
1505 | ; else: ZF=0, esi is not changed |
1503 | ; destroys eax |
1506 | ; destroys eax |
1504 | push ebp esi |
1507 | push ebp esi |
1505 | .loop: |
1508 | .loop: |
1506 | mov al, [ebp] |
1509 | mov al, [ebp] |
1507 | inc ebp |
1510 | inc ebp |
1508 | call char_toupper |
1511 | call char_toupper |
1509 | push eax |
1512 | push eax |
1510 | lodsb |
1513 | lodsb |
1511 | call char_toupper |
1514 | call char_toupper |
1512 | cmp al, [esp] |
1515 | cmp al, [esp] |
1513 | jnz .done |
1516 | jnz .done |
1514 | pop eax |
1517 | pop eax |
1515 | test al, al |
1518 | test al, al |
1516 | jnz .loop |
1519 | jnz .loop |
1517 | dec esi |
1520 | dec esi |
1518 | pop eax |
1521 | pop eax |
1519 | pop ebp |
1522 | pop ebp |
1520 | xor eax, eax ; set ZF flag |
1523 | xor eax, eax ; set ZF flag |
1521 | ret |
1524 | ret |
1522 | .done: |
1525 | .done: |
1523 | cmp al, '/' |
1526 | cmp al, '/' |
1524 | jnz @f |
1527 | jnz @f |
1525 | cmp byte [esp], 0 |
1528 | cmp byte [esp], 0 |
1526 | jnz @f |
1529 | jnz @f |
1527 | mov [esp+4], esi |
1530 | mov [esp+4], esi |
1528 | @@: |
1531 | @@: |
1529 | pop eax |
1532 | pop eax |
1530 | pop esi ebp |
1533 | pop esi ebp |
1531 | ret |
1534 | ret |
1532 | 1535 | ||
1533 | fat_find_lfn: |
1536 | fat_find_lfn: |
1534 | ; in: esi->name |
1537 | ; in: esi->name |
1535 | ; [esp+4] = next |
1538 | ; [esp+4] = next |
1536 | ; [esp+8] = first |
1539 | ; [esp+8] = first |
1537 | ; [esp+C]... - possibly parameters for first and next |
1540 | ; [esp+C]... - possibly parameters for first and next |
1538 | ; out: CF=1 - file not found, eax=error code |
1541 | ; out: CF=1 - file not found, eax=error code |
1539 | ; else CF=0, esi->next name component, edi->direntry |
1542 | ; else CF=0, esi->next name component, edi->direntry |
1540 | pusha |
1543 | pusha |
1541 | lea eax, [esp+0Ch+20h] |
1544 | lea eax, [esp+0Ch+20h] |
1542 | call dword [eax-4] |
1545 | call dword [eax-4] |
1543 | jc .reterr |
1546 | jc .reterr |
1544 | sub esp, 262*2 ; reserve place for LFN |
1547 | sub esp, 262*2 ; reserve place for LFN |
1545 | push 0 ; for fat_get_name: read ASCII name |
1548 | push 0 ; for fat_get_name: read ASCII name |
1546 | .l1: |
1549 | .l1: |
1547 | lea ebp, [esp+4] |
1550 | lea ebp, [esp+4] |
1548 | call fat_get_name |
1551 | call fat_get_name |
1549 | jc .l2 |
1552 | jc .l2 |
1550 | call fat_compare_name |
1553 | call fat_compare_name |
1551 | jz .found |
1554 | jz .found |
1552 | .l2: |
1555 | .l2: |
1553 | mov ebp, [esp+8+262*2+4] |
1556 | mov ebp, [esp+8+262*2+4] |
1554 | lea eax, [esp+0Ch+20h+262*2+4] |
1557 | lea eax, [esp+0Ch+20h+262*2+4] |
1555 | call dword [eax-8] |
1558 | call dword [eax-8] |
1556 | jnc .l1 |
1559 | jnc .l1 |
1557 | add esp, 262*2+4 |
1560 | add esp, 262*2+4 |
1558 | .reterr: |
1561 | .reterr: |
1559 | mov [esp+28], eax |
1562 | mov [esp+28], eax |
1560 | stc |
1563 | stc |
1561 | popa |
1564 | popa |
1562 | ret |
1565 | ret |
1563 | .found: |
1566 | .found: |
1564 | add esp, 262*2+4 |
1567 | add esp, 262*2+4 |
1565 | mov ebp, [esp+8] |
1568 | mov ebp, [esp+8] |
1566 | ; if this is LFN entry, advance to true entry |
1569 | ; if this is LFN entry, advance to true entry |
1567 | cmp byte [edi+11], 0xF |
1570 | cmp byte [edi+11], 0xF |
1568 | jnz @f |
1571 | jnz @f |
1569 | lea eax, [esp+0Ch+20h] |
1572 | lea eax, [esp+0Ch+20h] |
1570 | call dword [eax-8] |
1573 | call dword [eax-8] |
1571 | jc .reterr |
1574 | jc .reterr |
1572 | @@: |
1575 | @@: |
1573 | add esp, 8 ; CF=0 |
1576 | add esp, 8 ; CF=0 |
1574 | push esi |
1577 | push esi |
1575 | push edi |
1578 | push edi |
1576 | popa |
1579 | popa |
1577 | ret |
1580 | ret |
1578 | 1581 | ||
1579 | fat_time_to_bdfe: |
1582 | fat_time_to_bdfe: |
1580 | ; in: eax=FAT time |
1583 | ; in: eax=FAT time |
1581 | ; out: eax=BDFE time |
1584 | ; out: eax=BDFE time |
1582 | push ecx edx |
1585 | push ecx edx |
1583 | mov ecx, eax |
1586 | mov ecx, eax |
1584 | mov edx, eax |
1587 | mov edx, eax |
1585 | shr eax, 11 |
1588 | shr eax, 11 |
1586 | shl eax, 16 ; hours |
1589 | shl eax, 16 ; hours |
1587 | and edx, 0x1F |
1590 | and edx, 0x1F |
1588 | add edx, edx |
1591 | add edx, edx |
1589 | mov al, dl ; seconds |
1592 | mov al, dl ; seconds |
1590 | shr ecx, 5 |
1593 | shr ecx, 5 |
1591 | and ecx, 0x3F |
1594 | and ecx, 0x3F |
1592 | mov ah, cl ; minutes |
1595 | mov ah, cl ; minutes |
1593 | pop edx ecx |
1596 | pop edx ecx |
1594 | ret |
1597 | ret |
1595 | 1598 | ||
1596 | fat_date_to_bdfe: |
1599 | fat_date_to_bdfe: |
1597 | push ecx edx |
1600 | push ecx edx |
1598 | mov ecx, eax |
1601 | mov ecx, eax |
1599 | mov edx, eax |
1602 | mov edx, eax |
1600 | shr eax, 9 |
1603 | shr eax, 9 |
1601 | add ax, 1980 |
1604 | add ax, 1980 |
1602 | shl eax, 16 ; year |
1605 | shl eax, 16 ; year |
1603 | and edx, 0x1F |
1606 | and edx, 0x1F |
1604 | mov al, dl ; day |
1607 | mov al, dl ; day |
1605 | shr ecx, 5 |
1608 | shr ecx, 5 |
1606 | and ecx, 0xF |
1609 | and ecx, 0xF |
1607 | mov ah, cl ; month |
1610 | mov ah, cl ; month |
1608 | pop edx ecx |
1611 | pop edx ecx |
1609 | ret |
1612 | ret |
1610 | 1613 | ||
1611 | bdfe_to_fat_time: |
1614 | bdfe_to_fat_time: |
1612 | push edx |
1615 | push edx |
1613 | mov edx, eax |
1616 | mov edx, eax |
1614 | shr eax, 16 |
1617 | shr eax, 16 |
1615 | and dh, 0x3F |
1618 | and dh, 0x3F |
1616 | shl eax, 6 |
1619 | shl eax, 6 |
1617 | or al, dh |
1620 | or al, dh |
1618 | shr dl, 1 |
1621 | shr dl, 1 |
1619 | and dl, 0x1F |
1622 | and dl, 0x1F |
1620 | shl eax, 5 |
1623 | shl eax, 5 |
1621 | or al, dl |
1624 | or al, dl |
1622 | pop edx |
1625 | pop edx |
1623 | ret |
1626 | ret |
1624 | 1627 | ||
1625 | bdfe_to_fat_date: |
1628 | bdfe_to_fat_date: |
1626 | push edx |
1629 | push edx |
1627 | mov edx, eax |
1630 | mov edx, eax |
1628 | shr eax, 16 |
1631 | shr eax, 16 |
1629 | sub ax, 1980 |
1632 | sub ax, 1980 |
1630 | and dh, 0xF |
1633 | and dh, 0xF |
1631 | shl eax, 4 |
1634 | shl eax, 4 |
1632 | or al, dh |
1635 | or al, dh |
1633 | and dl, 0x1F |
1636 | and dl, 0x1F |
1634 | shl eax, 5 |
1637 | shl eax, 5 |
1635 | or al, dl |
1638 | or al, dl |
1636 | pop edx |
1639 | pop edx |
1637 | ret |
1640 | ret |
1638 | 1641 | ||
1639 | fat_entry_to_bdfe: |
1642 | fat_entry_to_bdfe: |
1640 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
1643 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
1641 | ; destroys eax |
1644 | ; destroys eax |
1642 | mov eax, [ebp-4] |
1645 | mov eax, [ebp-4] |
1643 | mov [esi+4], eax ; ASCII/UNICODE name |
1646 | mov [esi+4], eax ; ASCII/UNICODE name |
1644 | fat_entry_to_bdfe2: |
1647 | fat_entry_to_bdfe2: |
1645 | movzx eax, byte [edi+11] |
1648 | movzx eax, byte [edi+11] |
1646 | mov [esi], eax ; attributes |
1649 | mov [esi], eax ; attributes |
1647 | movzx eax, word [edi+14] |
1650 | movzx eax, word [edi+14] |
1648 | call fat_time_to_bdfe |
1651 | call fat_time_to_bdfe |
1649 | mov [esi+8], eax ; creation time |
1652 | mov [esi+8], eax ; creation time |
1650 | movzx eax, word [edi+16] |
1653 | movzx eax, word [edi+16] |
1651 | call fat_date_to_bdfe |
1654 | call fat_date_to_bdfe |
1652 | mov [esi+12], eax ; creation date |
1655 | mov [esi+12], eax ; creation date |
1653 | and dword [esi+16], 0 ; last access time is not supported on FAT |
1656 | and dword [esi+16], 0 ; last access time is not supported on FAT |
1654 | movzx eax, word [edi+18] |
1657 | movzx eax, word [edi+18] |
1655 | call fat_date_to_bdfe |
1658 | call fat_date_to_bdfe |
1656 | mov [esi+20], eax ; last access date |
1659 | mov [esi+20], eax ; last access date |
1657 | movzx eax, word [edi+22] |
1660 | movzx eax, word [edi+22] |
1658 | call fat_time_to_bdfe |
1661 | call fat_time_to_bdfe |
1659 | mov [esi+24], eax ; last write time |
1662 | mov [esi+24], eax ; last write time |
1660 | movzx eax, word [edi+24] |
1663 | movzx eax, word [edi+24] |
1661 | call fat_date_to_bdfe |
1664 | call fat_date_to_bdfe |
1662 | mov [esi+28], eax ; last write date |
1665 | mov [esi+28], eax ; last write date |
1663 | mov eax, [edi+28] |
1666 | mov eax, [edi+28] |
1664 | mov [esi+32], eax ; file size (low dword) |
1667 | mov [esi+32], eax ; file size (low dword) |
1665 | xor eax, eax |
1668 | xor eax, eax |
1666 | mov [esi+36], eax ; file size (high dword) |
1669 | mov [esi+36], eax ; file size (high dword) |
1667 | test ebp, ebp |
1670 | test ebp, ebp |
1668 | jz .ret |
1671 | jz .ret |
1669 | push ecx edi |
1672 | push ecx edi |
1670 | lea edi, [esi+40] |
1673 | lea edi, [esi+40] |
1671 | mov esi, ebp |
1674 | mov esi, ebp |
1672 | test byte [esi-4], 1 |
1675 | test byte [esi-4], 1 |
1673 | jz .ansi |
1676 | jz .ansi |
1674 | mov ecx, 260/2 |
1677 | mov ecx, 260/2 |
1675 | rep movsd |
1678 | rep movsd |
1676 | mov [edi-2], ax |
1679 | mov [edi-2], ax |
1677 | @@: |
1680 | @@: |
1678 | mov esi, edi |
1681 | mov esi, edi |
1679 | pop edi ecx |
1682 | pop edi ecx |
1680 | .ret: |
1683 | .ret: |
1681 | ret |
1684 | ret |
1682 | .ansi: |
1685 | .ansi: |
1683 | mov ecx, 264/4 |
1686 | mov ecx, 264/4 |
1684 | rep movsd |
1687 | rep movsd |
1685 | mov [edi-1], al |
1688 | mov [edi-1], al |
1686 | jmp @b |
1689 | jmp @b |
1687 | 1690 | ||
1688 | bdfe_to_fat_entry: |
1691 | bdfe_to_fat_entry: |
1689 | ; convert BDFE at edx to FAT entry at edi |
1692 | ; convert BDFE at edx to FAT entry at edi |
1690 | ; destroys eax |
1693 | ; destroys eax |
1691 | ; attributes byte |
1694 | ; attributes byte |
1692 | test byte [edi+11], 8 ; volume label? |
1695 | test byte [edi+11], 8 ; volume label? |
1693 | jnz @f |
1696 | jnz @f |
1694 | mov al, [edx] |
1697 | mov al, [edx] |
1695 | and al, 0x27 |
1698 | and al, 0x27 |
1696 | and byte [edi+11], 0x10 |
1699 | and byte [edi+11], 0x10 |
1697 | or byte [edi+11], al |
1700 | or byte [edi+11], al |
1698 | @@: |
1701 | @@: |
1699 | mov eax, [edx+8] |
1702 | mov eax, [edx+8] |
1700 | call bdfe_to_fat_time |
1703 | call bdfe_to_fat_time |
1701 | mov [edi+14], ax ; creation time |
1704 | mov [edi+14], ax ; creation time |
1702 | mov eax, [edx+12] |
1705 | mov eax, [edx+12] |
1703 | call bdfe_to_fat_date |
1706 | call bdfe_to_fat_date |
1704 | mov [edi+16], ax ; creation date |
1707 | mov [edi+16], ax ; creation date |
1705 | mov eax, [edx+20] |
1708 | mov eax, [edx+20] |
1706 | call bdfe_to_fat_date |
1709 | call bdfe_to_fat_date |
1707 | mov [edi+18], ax ; last access date |
1710 | mov [edi+18], ax ; last access date |
1708 | mov eax, [edx+24] |
1711 | mov eax, [edx+24] |
1709 | call bdfe_to_fat_time |
1712 | call bdfe_to_fat_time |
1710 | mov [edi+22], ax ; last write time |
1713 | mov [edi+22], ax ; last write time |
1711 | mov eax, [edx+28] |
1714 | mov eax, [edx+28] |
1712 | call bdfe_to_fat_date |
1715 | call bdfe_to_fat_date |
1713 | mov [edi+24], ax ; last write date |
1716 | mov [edi+24], ax ; last write date |
1714 | ret |
1717 | ret |
1715 | 1718 | ||
1716 | hd_find_lfn: |
1719 | hd_find_lfn: |
1717 | ; in: ebp -> FAT structure |
1720 | ; in: ebp -> FAT structure |
1718 | ; in: esi+[esp+4] -> name |
1721 | ; in: esi+[esp+4] -> name |
1719 | ; out: CF=1 - file not found, eax=error code |
1722 | ; out: CF=1 - file not found, eax=error code |
1720 | ; else CF=0 and edi->direntry, eax=sector |
1723 | ; else CF=0 and edi->direntry, eax=sector |
1721 | ; destroys eax |
1724 | ; destroys eax |
1722 | push esi edi |
1725 | push esi edi |
1723 | push 0 |
1726 | push 0 |
1724 | push 0 |
1727 | push 0 |
1725 | push fat1x_root_first |
1728 | push fat1x_root_first |
1726 | push fat1x_root_next |
1729 | push fat1x_root_next |
1727 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1730 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1728 | cmp [ebp+FAT.fs_type], 32 |
1731 | cmp [ebp+FAT.fs_type], 32 |
1729 | jz .fat32 |
1732 | jz .fat32 |
1730 | .loop: |
1733 | .loop: |
1731 | and [ebp+FAT.longname_sec1], 0 |
1734 | and [ebp+FAT.longname_sec1], 0 |
1732 | and [ebp+FAT.longname_sec2], 0 |
1735 | and [ebp+FAT.longname_sec2], 0 |
1733 | call fat_find_lfn |
1736 | call fat_find_lfn |
1734 | jc .notfound |
1737 | jc .notfound |
1735 | cmp byte [esi], 0 |
1738 | cmp byte [esi], 0 |
1736 | jz .found |
1739 | jz .found |
1737 | .continue: |
1740 | .continue: |
1738 | test byte [edi+11], 10h |
1741 | test byte [edi+11], 10h |
1739 | jz .notfound |
1742 | jz .notfound |
1740 | and dword [esp+12], 0 |
1743 | and dword [esp+12], 0 |
1741 | mov eax, [edi+20-2] |
1744 | mov eax, [edi+20-2] |
1742 | mov ax, [edi+26] ; cluster |
1745 | mov ax, [edi+26] ; cluster |
1743 | .fat32: |
1746 | .fat32: |
1744 | mov [esp+8], eax |
1747 | mov [esp+8], eax |
1745 | mov dword [esp+4], fat_notroot_first |
1748 | mov dword [esp+4], fat_notroot_first |
1746 | mov dword [esp], fat_notroot_next |
1749 | mov dword [esp], fat_notroot_next |
1747 | jmp .loop |
1750 | jmp .loop |
1748 | .notfound: |
1751 | .notfound: |
1749 | add esp, 16 |
1752 | add esp, 16 |
1750 | pop edi esi |
1753 | pop edi esi |
1751 | stc |
1754 | stc |
1752 | ret 4 |
1755 | ret 4 |
1753 | .found: |
1756 | .found: |
1754 | lea eax, [esp+4+24] |
1757 | lea eax, [esp+4+24] |
1755 | cmp dword [eax], 0 |
1758 | cmp dword [eax], 0 |
1756 | jz @f |
1759 | jz @f |
1757 | mov esi, [eax] |
1760 | mov esi, [eax] |
1758 | and dword [eax], 0 |
1761 | and dword [eax], 0 |
1759 | jmp .continue |
1762 | jmp .continue |
1760 | @@: |
1763 | @@: |
1761 | lea eax, [esp+8] |
1764 | lea eax, [esp+8] |
1762 | cmp dword [eax], 0 |
1765 | cmp dword [eax], 0 |
1763 | jz .root |
1766 | jz .root |
1764 | call fat_get_sector |
1767 | call fat_get_sector |
1765 | jmp .cmn |
1768 | jmp .cmn |
1766 | .root: |
1769 | .root: |
1767 | mov eax, [eax+4] |
1770 | mov eax, [eax+4] |
1768 | add eax, [ebp+FAT.ROOT_START] |
1771 | add eax, [ebp+FAT.ROOT_START] |
1769 | .cmn: |
1772 | .cmn: |
1770 | add esp, 20 ; CF=0 |
1773 | add esp, 20 ; CF=0 |
1771 | pop esi |
1774 | pop esi |
1772 | ret 4 |
1775 | ret 4 |
1773 | 1776 | ||
1774 | ;---------------------------------------------------------------- |
1777 | ;---------------------------------------------------------------- |
1775 | ; fat_Read - FAT implementation of reading a file |
1778 | ; fat_Read - FAT implementation of reading a file |
1776 | ; in: ebp = pointer to FAT structure |
1779 | ; in: ebp = pointer to FAT structure |
1777 | ; in: esi+[esp+4] = name |
1780 | ; in: esi+[esp+4] = name |
1778 | ; in: ebx = pointer to parameters from sysfunc 70 |
1781 | ; in: ebx = pointer to parameters from sysfunc 70 |
1779 | ; out: eax, ebx = return values for sysfunc 70 |
1782 | ; out: eax, ebx = return values for sysfunc 70 |
1780 | ;---------------------------------------------------------------- |
1783 | ;---------------------------------------------------------------- |
1781 | fat_Read: |
1784 | fat_Read: |
1782 | call fat_lock |
1785 | call fat_lock |
1783 | push edi |
1786 | push edi |
1784 | cmp byte [esi], 0 |
1787 | cmp byte [esi], 0 |
1785 | jnz @f |
1788 | jnz @f |
1786 | .noaccess: |
1789 | .noaccess: |
1787 | pop edi |
1790 | pop edi |
1788 | .noaccess_2: |
1791 | .noaccess_2: |
1789 | call fat_unlock |
1792 | call fat_unlock |
1790 | or ebx, -1 |
1793 | or ebx, -1 |
1791 | mov eax, ERROR_ACCESS_DENIED |
1794 | mov eax, ERROR_ACCESS_DENIED |
1792 | ret |
1795 | ret |
1793 | 1796 | ||
1794 | @@: |
1797 | @@: |
1795 | stdcall hd_find_lfn, [esp+4+4] |
1798 | stdcall hd_find_lfn, [esp+4+4] |
1796 | jnc .found |
1799 | jnc .found |
1797 | pop edi |
1800 | pop edi |
1798 | push eax |
1801 | push eax |
1799 | call fat_unlock |
1802 | call fat_unlock |
1800 | pop eax |
1803 | pop eax |
1801 | or ebx, -1 |
1804 | or ebx, -1 |
1802 | ret |
1805 | ret |
1803 | 1806 | ||
1804 | .found: |
1807 | .found: |
1805 | test byte [edi+11], 0x10; do not allow read directories |
1808 | test byte [edi+11], 0x10; do not allow read directories |
1806 | jnz .noaccess |
1809 | jnz .noaccess |
1807 | cmp dword [ebx+8], 0 |
1810 | cmp dword [ebx+8], 0 |
1808 | jz @f |
1811 | jz @f |
1809 | xor ebx, ebx |
1812 | xor ebx, ebx |
1810 | .reteof: |
1813 | .reteof: |
1811 | call fat_unlock |
1814 | call fat_unlock |
1812 | mov eax, ERROR_END_OF_FILE |
1815 | mov eax, ERROR_END_OF_FILE |
1813 | pop edi |
1816 | pop edi |
1814 | ret |
1817 | ret |
1815 | @@: |
1818 | @@: |
1816 | mov ecx, [ebx+12] ; size |
1819 | mov ecx, [ebx+12] ; size |
1817 | mov edx, [ebx+16] ; pointer |
1820 | mov edx, [ebx+16] ; pointer |
1818 | mov ebx, [ebx+4] ; file offset |
1821 | mov ebx, [ebx+4] ; file offset |
1819 | push edx |
1822 | push edx |
1820 | push 0 |
1823 | push 0 |
1821 | mov eax, [edi+28] |
1824 | mov eax, [edi+28] |
1822 | sub eax, ebx |
1825 | sub eax, ebx |
1823 | jb .eof |
1826 | jb .eof |
1824 | cmp eax, ecx |
1827 | cmp eax, ecx |
1825 | jae @f |
1828 | jae @f |
1826 | mov ecx, eax |
1829 | mov ecx, eax |
1827 | mov byte [esp], 6 |
1830 | mov byte [esp], 6 |
1828 | @@: |
1831 | @@: |
1829 | mov eax, [edi+20-2] |
1832 | mov eax, [edi+20-2] |
1830 | mov ax, [edi+26] |
1833 | mov ax, [edi+26] |
1831 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1834 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1832 | .new_cluster: |
1835 | .new_cluster: |
1833 | jecxz .new_sector |
1836 | jecxz .new_sector |
1834 | cmp eax, 2 |
1837 | cmp eax, 2 |
1835 | jb .eof |
1838 | jb .eof |
1836 | cmp eax, [ebp+FAT.fatRESERVED] |
1839 | cmp eax, [ebp+FAT.fatRESERVED] |
1837 | jae .eof |
1840 | jae .eof |
1838 | mov [ebp+FAT.cluster_tmp], eax |
1841 | mov [ebp+FAT.cluster_tmp], eax |
1839 | dec eax |
1842 | dec eax |
1840 | dec eax |
1843 | dec eax |
1841 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
1844 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
1842 | imul eax, edi |
1845 | imul eax, edi |
1843 | add eax, [ebp+FAT.DATA_START] |
1846 | add eax, [ebp+FAT.DATA_START] |
1844 | .new_sector: |
1847 | .new_sector: |
1845 | test ecx, ecx |
1848 | test ecx, ecx |
1846 | jz .done |
1849 | jz .done |
1847 | sub ebx, 512 |
1850 | sub ebx, 512 |
1848 | jae .skip |
1851 | jae .skip |
1849 | add ebx, 512 |
1852 | add ebx, 512 |
1850 | jnz .force_buf |
1853 | jnz .force_buf |
1851 | cmp ecx, 512 |
1854 | cmp ecx, 512 |
1852 | jb .force_buf |
1855 | jb .force_buf |
1853 | ; we may read directly to given buffer |
1856 | ; we may read directly to given buffer |
1854 | push eax ebx |
1857 | push eax ebx |
1855 | mov ebx, edx |
1858 | mov ebx, edx |
1856 | call fs_read32_app |
1859 | call fs_read32_app |
1857 | test eax, eax |
1860 | test eax, eax |
1858 | pop ebx eax |
1861 | pop ebx eax |
1859 | jne .noaccess_1 |
1862 | jne .noaccess_1 |
1860 | add edx, 512 |
1863 | add edx, 512 |
1861 | sub ecx, 512 |
1864 | sub ecx, 512 |
1862 | jmp .skip |
1865 | jmp .skip |
1863 | .force_buf: |
1866 | .force_buf: |
1864 | ; we must read sector to temporary buffer and then copy it to destination |
1867 | ; we must read sector to temporary buffer and then copy it to destination |
1865 | push eax ebx |
1868 | push eax ebx |
1866 | lea ebx, [ebp+FAT.buffer] |
1869 | lea ebx, [ebp+FAT.buffer] |
1867 | call fs_read32_app |
1870 | call fs_read32_app |
1868 | test eax, eax |
1871 | test eax, eax |
1869 | mov eax, ebx |
1872 | mov eax, ebx |
1870 | pop ebx |
1873 | pop ebx |
1871 | jne .noaccess_3 |
1874 | jne .noaccess_3 |
1872 | add eax, ebx |
1875 | add eax, ebx |
1873 | push ecx |
1876 | push ecx |
1874 | add ecx, ebx |
1877 | add ecx, ebx |
1875 | cmp ecx, 512 |
1878 | cmp ecx, 512 |
1876 | jbe @f |
1879 | jbe @f |
1877 | mov ecx, 512 |
1880 | mov ecx, 512 |
1878 | @@: |
1881 | @@: |
1879 | sub ecx, ebx |
1882 | sub ecx, ebx |
1880 | mov ebx, edx |
1883 | mov ebx, edx |
1881 | call memmove |
1884 | call memmove |
1882 | add edx, ecx |
1885 | add edx, ecx |
1883 | sub [esp], ecx |
1886 | sub [esp], ecx |
1884 | pop ecx |
1887 | pop ecx |
1885 | pop eax |
1888 | pop eax |
1886 | xor ebx, ebx |
1889 | xor ebx, ebx |
1887 | .skip: |
1890 | .skip: |
1888 | inc eax |
1891 | inc eax |
1889 | dec edi |
1892 | dec edi |
1890 | jnz .new_sector |
1893 | jnz .new_sector |
1891 | mov eax, [ebp+FAT.cluster_tmp] |
1894 | mov eax, [ebp+FAT.cluster_tmp] |
1892 | call get_FAT |
1895 | call get_FAT |
1893 | jc .noaccess_1 |
1896 | jc .noaccess_1 |
1894 | 1897 | ||
1895 | jmp .new_cluster |
1898 | jmp .new_cluster |
1896 | .noaccess_3: |
1899 | .noaccess_3: |
1897 | pop eax |
1900 | pop eax |
1898 | .noaccess_1: |
1901 | .noaccess_1: |
1899 | pop eax |
1902 | pop eax |
1900 | push ERROR_DEVICE |
1903 | push ERROR_DEVICE |
1901 | .done: |
1904 | .done: |
1902 | mov ebx, edx |
1905 | mov ebx, edx |
1903 | call fat_unlock |
1906 | call fat_unlock |
1904 | pop eax edx edi |
1907 | pop eax edx edi |
1905 | sub ebx, edx |
1908 | sub ebx, edx |
1906 | ret |
1909 | ret |
1907 | .eof: |
1910 | .eof: |
1908 | mov ebx, edx |
1911 | mov ebx, edx |
1909 | pop eax edx |
1912 | pop eax edx |
1910 | sub ebx, edx |
1913 | sub ebx, edx |
1911 | jmp .reteof |
1914 | jmp .reteof |
1912 | 1915 | ||
1913 | ;---------------------------------------------------------------- |
1916 | ;---------------------------------------------------------------- |
1914 | ; fat_ReadFolder - FAT implementation of reading a folder |
1917 | ; fat_ReadFolder - FAT implementation of reading a folder |
1915 | ; in: ebp = pointer to FAT structure |
1918 | ; in: ebp = pointer to FAT structure |
1916 | ; in: esi+[esp+4] = name |
1919 | ; in: esi+[esp+4] = name |
1917 | ; in: ebx = pointer to parameters from sysfunc 70 |
1920 | ; in: ebx = pointer to parameters from sysfunc 70 |
1918 | ; out: eax, ebx = return values for sysfunc 70 |
1921 | ; out: eax, ebx = return values for sysfunc 70 |
1919 | ;---------------------------------------------------------------- |
1922 | ;---------------------------------------------------------------- |
1920 | fat_ReadFolder: |
1923 | fat_ReadFolder: |
1921 | call fat_lock |
1924 | call fat_lock |
1922 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1925 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1923 | push edi |
1926 | push edi |
1924 | cmp byte [esi], 0 |
1927 | cmp byte [esi], 0 |
1925 | jz .doit |
1928 | jz .doit |
1926 | stdcall hd_find_lfn, [esp+4+4] |
1929 | stdcall hd_find_lfn, [esp+4+4] |
1927 | jnc .found |
1930 | jnc .found |
1928 | pop edi |
1931 | pop edi |
1929 | push eax |
1932 | push eax |
1930 | call fat_unlock |
1933 | call fat_unlock |
1931 | pop eax |
1934 | pop eax |
1932 | or ebx, -1 |
1935 | or ebx, -1 |
1933 | ret |
1936 | ret |
1934 | .found: |
1937 | .found: |
1935 | test byte [edi+11], 0x10 ; do not allow read files |
1938 | test byte [edi+11], 0x10 ; do not allow read files |
1936 | jnz .found_dir |
1939 | jnz .found_dir |
1937 | pop edi |
1940 | pop edi |
1938 | call fat_unlock |
1941 | call fat_unlock |
1939 | or ebx, -1 |
1942 | or ebx, -1 |
1940 | mov eax, ERROR_ACCESS_DENIED |
1943 | mov eax, ERROR_ACCESS_DENIED |
1941 | ret |
1944 | ret |
1942 | .found_dir: |
1945 | .found_dir: |
1943 | mov eax, [edi+20-2] |
1946 | mov eax, [edi+20-2] |
1944 | mov ax, [edi+26] ; eax=cluster |
1947 | mov ax, [edi+26] ; eax=cluster |
1945 | .doit: |
1948 | .doit: |
1946 | push esi |
1949 | push esi |
1947 | sub esp, 262*2 ; reserve space for LFN |
1950 | sub esp, 262*2 ; reserve space for LFN |
1948 | push dword [ebx+8] ; for fat_get_name: read ANSI/UNICODE name |
1951 | push dword [ebx+8] ; for fat_get_name: read ANSI/UNICODE name |
1949 | mov edx, [ebx+16] ; pointer to buffer |
1952 | mov edx, [ebx+16] ; pointer to buffer |
1950 | ; init header |
1953 | ; init header |
1951 | push eax |
1954 | push eax |
1952 | mov edi, edx |
1955 | mov edi, edx |
1953 | mov ecx, 32/4 |
1956 | mov ecx, 32/4 |
1954 | xor eax, eax |
1957 | xor eax, eax |
1955 | rep stosd |
1958 | rep stosd |
1956 | pop eax |
1959 | pop eax |
1957 | mov byte [edx], 1 ; version |
1960 | mov byte [edx], 1 ; version |
1958 | mov esi, edi ; esi points to BDFE |
1961 | mov esi, edi ; esi points to BDFE |
1959 | mov ecx, [ebx+12] ; number of blocks to read |
1962 | mov ecx, [ebx+12] ; number of blocks to read |
1960 | mov ebx, [ebx+4] ; index of the first block |
1963 | mov ebx, [ebx+4] ; index of the first block |
1961 | .new_cluster: |
1964 | .new_cluster: |
1962 | mov [ebp+FAT.cluster_tmp], eax |
1965 | mov [ebp+FAT.cluster_tmp], eax |
1963 | test eax, eax |
1966 | test eax, eax |
1964 | jnz @f |
1967 | jnz @f |
1965 | cmp [ebp+FAT.fs_type], 32 |
1968 | cmp [ebp+FAT.fs_type], 32 |
1966 | jz .notfound |
1969 | jz .notfound |
1967 | mov eax, [ebp+FAT.ROOT_START] |
1970 | mov eax, [ebp+FAT.ROOT_START] |
1968 | push [ebp+FAT.ROOT_SECTORS] |
1971 | push [ebp+FAT.ROOT_SECTORS] |
1969 | push ebx |
1972 | push ebx |
1970 | jmp .new_sector |
1973 | jmp .new_sector |
1971 | @@: |
1974 | @@: |
1972 | dec eax |
1975 | dec eax |
1973 | dec eax |
1976 | dec eax |
1974 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1977 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1975 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
1978 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
1976 | add eax, [ebp+FAT.DATA_START] |
1979 | add eax, [ebp+FAT.DATA_START] |
1977 | push ebx |
1980 | push ebx |
1978 | .new_sector: |
1981 | .new_sector: |
1979 | lea ebx, [ebp+FAT.buffer] |
1982 | lea ebx, [ebp+FAT.buffer] |
1980 | mov edi, ebx |
1983 | mov edi, ebx |
1981 | push eax |
1984 | push eax |
1982 | call fs_read32_sys |
1985 | call fs_read32_sys |
1983 | test eax, eax |
1986 | test eax, eax |
1984 | pop eax |
1987 | pop eax |
1985 | jnz .notfound2 |
1988 | jnz .notfound2 |
1986 | add ebx, 512 |
1989 | add ebx, 512 |
1987 | push eax |
1990 | push eax |
1988 | .l1: |
1991 | .l1: |
1989 | push ebp |
1992 | push ebp |
1990 | lea ebp, [esp+20] |
1993 | lea ebp, [esp+20] |
1991 | call fat_get_name |
1994 | call fat_get_name |
1992 | pop ebp |
1995 | pop ebp |
1993 | jc .l2 |
1996 | jc .l2 |
1994 | cmp byte [edi+11], 0xF |
1997 | cmp byte [edi+11], 0xF |
1995 | jnz .do_bdfe |
1998 | jnz .do_bdfe |
1996 | add edi, 0x20 |
1999 | add edi, 0x20 |
1997 | cmp edi, ebx |
2000 | cmp edi, ebx |
1998 | jb .do_bdfe |
2001 | jb .do_bdfe |
1999 | pop eax |
2002 | pop eax |
2000 | inc eax |
2003 | inc eax |
2001 | dec dword [esp+4] |
2004 | dec dword [esp+4] |
2002 | jnz @f |
2005 | jnz @f |
2003 | mov eax, [ebp+FAT.cluster_tmp] |
2006 | mov eax, [ebp+FAT.cluster_tmp] |
2004 | test eax, eax |
2007 | test eax, eax |
2005 | jz .done |
2008 | jz .done |
2006 | call get_FAT |
2009 | call get_FAT |
2007 | jc .notfound2 |
2010 | jc .notfound2 |
2008 | cmp eax, 2 |
2011 | cmp eax, 2 |
2009 | jb .done |
2012 | jb .done |
2010 | cmp eax, [ebp+FAT.fatRESERVED] |
2013 | cmp eax, [ebp+FAT.fatRESERVED] |
2011 | jae .done |
2014 | jae .done |
2012 | push eax |
2015 | push eax |
2013 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2016 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2014 | mov [esp+8], eax |
2017 | mov [esp+8], eax |
2015 | pop eax |
2018 | pop eax |
2016 | mov [ebp+FAT.cluster_tmp], eax |
2019 | mov [ebp+FAT.cluster_tmp], eax |
2017 | dec eax |
2020 | dec eax |
2018 | dec eax |
2021 | dec eax |
2019 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2022 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2020 | add eax, [ebp+FAT.DATA_START] |
2023 | add eax, [ebp+FAT.DATA_START] |
2021 | @@: |
2024 | @@: |
2022 | lea ebx, [ebp+FAT.buffer] |
2025 | lea ebx, [ebp+FAT.buffer] |
2023 | mov edi, ebx |
2026 | mov edi, ebx |
2024 | push eax |
2027 | push eax |
2025 | call fs_read32_sys |
2028 | call fs_read32_sys |
2026 | test eax, eax |
2029 | test eax, eax |
2027 | pop eax |
2030 | pop eax |
2028 | jnz .notfound2 |
2031 | jnz .notfound2 |
2029 | add ebx, 512 |
2032 | add ebx, 512 |
2030 | push eax |
2033 | push eax |
2031 | .do_bdfe: |
2034 | .do_bdfe: |
2032 | inc dword [edx+8] ; new file found |
2035 | inc dword [edx+8] ; new file found |
2033 | dec dword [esp+4] |
2036 | dec dword [esp+4] |
2034 | jns .l2 |
2037 | jns .l2 |
2035 | dec ecx |
2038 | dec ecx |
2036 | js .l2 |
2039 | js .l2 |
2037 | inc dword [edx+4] ; new file block copied |
2040 | inc dword [edx+4] ; new file block copied |
2038 | push ebp |
2041 | push ebp |
2039 | lea ebp, [esp+20] |
2042 | lea ebp, [esp+20] |
2040 | call fat_entry_to_bdfe |
2043 | call fat_entry_to_bdfe |
2041 | pop ebp |
2044 | pop ebp |
2042 | .l2: |
2045 | .l2: |
2043 | add edi, 0x20 |
2046 | add edi, 0x20 |
2044 | cmp edi, ebx |
2047 | cmp edi, ebx |
2045 | jb .l1 |
2048 | jb .l1 |
2046 | pop eax |
2049 | pop eax |
2047 | inc eax |
2050 | inc eax |
2048 | dec dword [esp+4] |
2051 | dec dword [esp+4] |
2049 | jnz .new_sector |
2052 | jnz .new_sector |
2050 | mov eax, [ebp+FAT.cluster_tmp] |
2053 | mov eax, [ebp+FAT.cluster_tmp] |
2051 | test eax, eax |
2054 | test eax, eax |
2052 | jz .done |
2055 | jz .done |
2053 | call get_FAT |
2056 | call get_FAT |
2054 | jc .notfound2 |
2057 | jc .notfound2 |
2055 | cmp eax, 2 |
2058 | cmp eax, 2 |
2056 | jb .done |
2059 | jb .done |
2057 | cmp eax, [ebp+FAT.fatRESERVED] |
2060 | cmp eax, [ebp+FAT.fatRESERVED] |
2058 | jae .done |
2061 | jae .done |
2059 | push eax |
2062 | push eax |
2060 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2063 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2061 | mov [esp+8], eax |
2064 | mov [esp+8], eax |
2062 | pop eax |
2065 | pop eax |
2063 | pop ebx |
2066 | pop ebx |
2064 | add esp, 4 |
2067 | add esp, 4 |
2065 | jmp .new_cluster |
2068 | jmp .new_cluster |
2066 | .notfound2: |
2069 | .notfound2: |
2067 | add esp, 8 |
2070 | add esp, 8 |
2068 | .notfound: |
2071 | .notfound: |
2069 | add esp, 262*2+4 |
2072 | add esp, 262*2+4 |
2070 | pop esi edi |
2073 | pop esi edi |
2071 | mov ebx, [edx+4] |
2074 | mov ebx, [edx+4] |
2072 | call fat_unlock |
2075 | call fat_unlock |
2073 | mov eax, ERROR_DEVICE |
2076 | mov eax, ERROR_DEVICE |
2074 | ret |
2077 | ret |
2075 | .done: |
2078 | .done: |
2076 | add esp, 262*2+4+8 |
2079 | add esp, 262*2+4+8 |
2077 | mov ebx, [edx+4] |
2080 | mov ebx, [edx+4] |
2078 | xor eax, eax |
2081 | xor eax, eax |
2079 | dec ecx |
2082 | dec ecx |
2080 | js @f |
2083 | js @f |
2081 | mov al, ERROR_END_OF_FILE |
2084 | mov al, ERROR_END_OF_FILE |
2082 | @@: |
2085 | @@: |
2083 | push eax |
2086 | push eax |
2084 | call fat_unlock |
2087 | call fat_unlock |
2085 | pop eax |
2088 | pop eax |
2086 | pop esi edi |
2089 | pop esi edi |
2087 | ret |
2090 | ret |
2088 | 2091 | ||
2089 | fat1x_root_next: |
2092 | fat1x_root_next: |
2090 | push ecx |
2093 | push ecx |
2091 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2094 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2092 | cmp edi, ecx |
2095 | cmp edi, ecx |
2093 | jae fat1x_root_next_sector |
2096 | jae fat1x_root_next_sector |
2094 | pop ecx |
2097 | pop ecx |
2095 | add edi, 0x20 |
2098 | add edi, 0x20 |
2096 | ret ; CF=0 |
2099 | ret ; CF=0 |
2097 | fat1x_root_next_sector: |
2100 | fat1x_root_next_sector: |
2098 | ; read next sector |
2101 | ; read next sector |
2099 | push [ebp+FAT.longname_sec2] |
2102 | push [ebp+FAT.longname_sec2] |
2100 | pop [ebp+FAT.longname_sec1] |
2103 | pop [ebp+FAT.longname_sec1] |
2101 | mov ecx, [eax+4] |
2104 | mov ecx, [eax+4] |
2102 | push ecx |
2105 | push ecx |
2103 | add ecx, [ebp+FAT.ROOT_START] |
2106 | add ecx, [ebp+FAT.ROOT_START] |
2104 | mov [ebp+FAT.longname_sec2], ecx |
2107 | mov [ebp+FAT.longname_sec2], ecx |
2105 | pop ecx |
2108 | pop ecx |
2106 | inc ecx |
2109 | inc ecx |
2107 | mov [eax+4], ecx |
2110 | mov [eax+4], ecx |
2108 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
2111 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
2109 | pop ecx |
2112 | pop ecx |
2110 | jb fat1x_root_first |
2113 | jb fat1x_root_first |
2111 | mov eax, ERROR_FILE_NOT_FOUND |
2114 | mov eax, ERROR_FILE_NOT_FOUND |
2112 | stc |
2115 | stc |
2113 | ret |
2116 | ret |
2114 | fat1x_root_first: |
2117 | fat1x_root_first: |
2115 | mov eax, [eax+4] |
2118 | mov eax, [eax+4] |
2116 | add eax, [ebp+FAT.ROOT_START] |
2119 | add eax, [ebp+FAT.ROOT_START] |
2117 | push ebx |
2120 | push ebx |
2118 | lea edi, [ebp+FAT.buffer] |
2121 | lea edi, [ebp+FAT.buffer] |
2119 | mov ebx, edi |
2122 | mov ebx, edi |
2120 | call fs_read32_sys |
2123 | call fs_read32_sys |
2121 | pop ebx |
2124 | pop ebx |
2122 | test eax, eax |
2125 | test eax, eax |
2123 | jnz .readerr |
2126 | jnz .readerr |
2124 | ret ; CF=0 |
2127 | ret ; CF=0 |
2125 | .readerr: |
2128 | .readerr: |
2126 | mov eax, ERROR_DEVICE |
2129 | mov eax, ERROR_DEVICE |
2127 | stc |
2130 | stc |
2128 | ret |
2131 | ret |
2129 | .notfound: |
2132 | .notfound: |
2130 | mov eax, ERROR_FILE_NOT_FOUND |
2133 | mov eax, ERROR_FILE_NOT_FOUND |
2131 | stc |
2134 | stc |
2132 | ret |
2135 | ret |
2133 | fat1x_root_begin_write: |
2136 | fat1x_root_begin_write: |
2134 | push edi eax |
2137 | push edi eax |
2135 | call fat1x_root_first |
2138 | call fat1x_root_first |
2136 | pop eax edi |
2139 | pop eax edi |
2137 | ret |
2140 | ret |
2138 | fat1x_root_end_write: |
2141 | fat1x_root_end_write: |
2139 | pusha |
2142 | pusha |
2140 | mov eax, [eax+4] |
2143 | mov eax, [eax+4] |
2141 | add eax, [ebp+FAT.ROOT_START] |
2144 | add eax, [ebp+FAT.ROOT_START] |
2142 | lea ebx, [ebp+FAT.buffer] |
2145 | lea ebx, [ebp+FAT.buffer] |
2143 | call fs_write32_sys |
2146 | call fs_write32_sys |
2144 | popa |
2147 | popa |
2145 | ret |
2148 | ret |
2146 | fat1x_root_next_write: |
2149 | fat1x_root_next_write: |
2147 | push ecx |
2150 | push ecx |
2148 | lea ecx, [ebp+FAT.buffer+0x200] |
2151 | lea ecx, [ebp+FAT.buffer+0x200] |
2149 | cmp edi, ecx |
2152 | cmp edi, ecx |
2150 | jae @f |
2153 | jae @f |
2151 | pop ecx |
2154 | pop ecx |
2152 | ret |
2155 | ret |
2153 | @@: |
2156 | @@: |
2154 | call fat1x_root_end_write |
2157 | call fat1x_root_end_write |
2155 | jmp fat1x_root_next_sector |
2158 | jmp fat1x_root_next_sector |
2156 | fat1x_root_extend_dir: |
2159 | fat1x_root_extend_dir: |
2157 | stc |
2160 | stc |
2158 | ret |
2161 | ret |
2159 | 2162 | ||
2160 | fat_notroot_next: |
2163 | fat_notroot_next: |
2161 | push ecx |
2164 | push ecx |
2162 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2165 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2163 | cmp edi, ecx |
2166 | cmp edi, ecx |
2164 | jae fat_notroot_next_sector |
2167 | jae fat_notroot_next_sector |
2165 | pop ecx |
2168 | pop ecx |
2166 | add edi, 0x20 |
2169 | add edi, 0x20 |
2167 | ret ; CF=0 |
2170 | ret ; CF=0 |
2168 | fat_notroot_next_sector: |
2171 | fat_notroot_next_sector: |
2169 | push [ebp+FAT.longname_sec2] |
2172 | push [ebp+FAT.longname_sec2] |
2170 | pop [ebp+FAT.longname_sec1] |
2173 | pop [ebp+FAT.longname_sec1] |
2171 | push eax |
2174 | push eax |
2172 | call fat_get_sector |
2175 | call fat_get_sector |
2173 | mov [ebp+FAT.longname_sec2], eax |
2176 | mov [ebp+FAT.longname_sec2], eax |
2174 | pop eax |
2177 | pop eax |
2175 | mov ecx, [eax+4] |
2178 | mov ecx, [eax+4] |
2176 | inc ecx |
2179 | inc ecx |
2177 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2180 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2178 | jae fat_notroot_next_cluster |
2181 | jae fat_notroot_next_cluster |
2179 | mov [eax+4], ecx |
2182 | mov [eax+4], ecx |
2180 | jmp @f |
2183 | jmp @f |
2181 | fat_notroot_next_cluster: |
2184 | fat_notroot_next_cluster: |
2182 | push eax |
2185 | push eax |
2183 | mov eax, [eax] |
2186 | mov eax, [eax] |
2184 | call get_FAT |
2187 | call get_FAT |
2185 | mov ecx, eax |
2188 | mov ecx, eax |
2186 | pop eax |
2189 | pop eax |
2187 | jc fat_notroot_first.deverr |
2190 | jc fat_notroot_first.deverr |
2188 | cmp ecx, 2 |
2191 | cmp ecx, 2 |
2189 | jb fat_notroot_next_err |
2192 | jb fat_notroot_next_err |
2190 | cmp ecx, [ebp+FAT.fatRESERVED] |
2193 | cmp ecx, [ebp+FAT.fatRESERVED] |
2191 | jae fat_notroot_next_err |
2194 | jae fat_notroot_next_err |
2192 | mov [eax], ecx |
2195 | mov [eax], ecx |
2193 | and dword [eax+4], 0 |
2196 | and dword [eax+4], 0 |
2194 | @@: |
2197 | @@: |
2195 | pop ecx |
2198 | pop ecx |
2196 | fat_notroot_first: |
2199 | fat_notroot_first: |
2197 | call fat_get_sector |
2200 | call fat_get_sector |
2198 | push ebx |
2201 | push ebx |
2199 | lea edi, [ebp+FAT.buffer] |
2202 | lea edi, [ebp+FAT.buffer] |
2200 | mov ebx, edi |
2203 | mov ebx, edi |
2201 | call fs_read32_sys |
2204 | call fs_read32_sys |
2202 | pop ebx |
2205 | pop ebx |
2203 | test eax, eax |
2206 | test eax, eax |
2204 | jz .ret ; CF=0 |
2207 | jz .ret ; CF=0 |
2205 | push ecx |
2208 | push ecx |
2206 | .deverr: |
2209 | .deverr: |
2207 | pop ecx |
2210 | pop ecx |
2208 | mov eax, ERROR_DEVICE |
2211 | mov eax, ERROR_DEVICE |
2209 | stc |
2212 | stc |
2210 | .ret: |
2213 | .ret: |
2211 | ret |
2214 | ret |
2212 | fat_notroot_next_err: |
2215 | fat_notroot_next_err: |
2213 | pop ecx |
2216 | pop ecx |
2214 | mov eax, ERROR_FILE_NOT_FOUND |
2217 | mov eax, ERROR_FILE_NOT_FOUND |
2215 | stc |
2218 | stc |
2216 | ret |
2219 | ret |
2217 | fat_notroot_begin_write: |
2220 | fat_notroot_begin_write: |
2218 | push eax edi |
2221 | push eax edi |
2219 | call fat_notroot_first |
2222 | call fat_notroot_first |
2220 | pop edi eax |
2223 | pop edi eax |
2221 | ret |
2224 | ret |
2222 | fat_notroot_end_write: |
2225 | fat_notroot_end_write: |
2223 | call fat_get_sector |
2226 | call fat_get_sector |
2224 | push ebx |
2227 | push ebx |
2225 | lea ebx, [ebp+FAT.buffer] |
2228 | lea ebx, [ebp+FAT.buffer] |
2226 | call fs_write32_sys |
2229 | call fs_write32_sys |
2227 | pop ebx |
2230 | pop ebx |
2228 | ret |
2231 | ret |
2229 | fat_notroot_next_write: |
2232 | fat_notroot_next_write: |
2230 | push ecx |
2233 | push ecx |
2231 | lea ecx, [ebp+FAT.buffer+0x200] |
2234 | lea ecx, [ebp+FAT.buffer+0x200] |
2232 | cmp edi, ecx |
2235 | cmp edi, ecx |
2233 | jae @f |
2236 | jae @f |
2234 | pop ecx |
2237 | pop ecx |
2235 | ret |
2238 | ret |
2236 | @@: |
2239 | @@: |
2237 | push eax |
2240 | push eax |
2238 | call fat_notroot_end_write |
2241 | call fat_notroot_end_write |
2239 | pop eax |
2242 | pop eax |
2240 | jmp fat_notroot_next_sector |
2243 | jmp fat_notroot_next_sector |
2241 | fat_notroot_extend_dir: |
2244 | fat_notroot_extend_dir: |
2242 | push eax |
2245 | push eax |
2243 | call get_free_FAT |
2246 | call get_free_FAT |
2244 | jnc .found |
2247 | jnc .found |
2245 | pop eax |
2248 | pop eax |
2246 | ret ; CF=1 |
2249 | ret ; CF=1 |
2247 | .found: |
2250 | .found: |
2248 | push edx |
2251 | push edx |
2249 | mov edx, [ebp+FAT.fatEND] |
2252 | mov edx, [ebp+FAT.fatEND] |
2250 | call set_FAT |
2253 | call set_FAT |
2251 | jc .writeerr |
2254 | jc .writeerr |
2252 | mov edx, eax |
2255 | mov edx, eax |
2253 | mov eax, [esp+4] |
2256 | mov eax, [esp+4] |
2254 | mov eax, [eax] |
2257 | mov eax, [eax] |
2255 | push edx |
2258 | push edx |
2256 | call set_FAT |
2259 | call set_FAT |
2257 | pop edx |
2260 | pop edx |
2258 | jnc @f |
2261 | jnc @f |
2259 | .writeerr: |
2262 | .writeerr: |
2260 | pop edx |
2263 | pop edx |
2261 | pop eax |
2264 | pop eax |
2262 | stc |
2265 | stc |
2263 | ret |
2266 | ret |
2264 | @@: |
2267 | @@: |
2265 | push ecx |
2268 | push ecx |
2266 | or ecx, -1 |
2269 | or ecx, -1 |
2267 | call add_disk_free_space |
2270 | call add_disk_free_space |
2268 | ; zero new cluster |
2271 | ; zero new cluster |
2269 | mov ecx, 512/4 |
2272 | mov ecx, 512/4 |
2270 | lea edi, [ebp+FAT.buffer] |
2273 | lea edi, [ebp+FAT.buffer] |
2271 | push edi |
2274 | push edi |
2272 | xor eax, eax |
2275 | xor eax, eax |
2273 | rep stosd |
2276 | rep stosd |
2274 | pop edi |
2277 | pop edi |
2275 | pop ecx |
2278 | pop ecx |
2276 | mov eax, [esp+4] |
2279 | mov eax, [esp+4] |
2277 | mov [eax], edx |
2280 | mov [eax], edx |
2278 | and dword [eax+4], 0 |
2281 | and dword [eax+4], 0 |
2279 | pop edx |
2282 | pop edx |
2280 | mov eax, [eax] |
2283 | mov eax, [eax] |
2281 | dec eax |
2284 | dec eax |
2282 | dec eax |
2285 | dec eax |
2283 | push ebx ecx |
2286 | push ebx ecx |
2284 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2287 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2285 | imul eax, ecx |
2288 | imul eax, ecx |
2286 | add eax, [ebp+FAT.DATA_START] |
2289 | add eax, [ebp+FAT.DATA_START] |
2287 | mov ebx, edi |
2290 | mov ebx, edi |
2288 | @@: |
2291 | @@: |
2289 | push eax |
2292 | push eax |
2290 | call fs_write32_sys |
2293 | call fs_write32_sys |
2291 | pop eax |
2294 | pop eax |
2292 | inc eax |
2295 | inc eax |
2293 | loop @b |
2296 | loop @b |
2294 | pop ecx ebx eax |
2297 | pop ecx ebx eax |
2295 | clc |
2298 | clc |
2296 | ret |
2299 | ret |
2297 | 2300 | ||
2298 | fat_get_sector: |
2301 | fat_get_sector: |
2299 | push ecx |
2302 | push ecx |
2300 | mov ecx, [eax] |
2303 | mov ecx, [eax] |
2301 | dec ecx |
2304 | dec ecx |
2302 | dec ecx |
2305 | dec ecx |
2303 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2306 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2304 | add ecx, [ebp+FAT.DATA_START] |
2307 | add ecx, [ebp+FAT.DATA_START] |
2305 | add ecx, [eax+4] |
2308 | add ecx, [eax+4] |
2306 | mov eax, ecx |
2309 | mov eax, ecx |
2307 | pop ecx |
2310 | pop ecx |
2308 | ret |
2311 | ret |
2309 | 2312 | ||
2310 | fshrad: |
2313 | fshrad: |
2311 | call fat_unlock |
2314 | call fat_unlock |
2312 | mov eax, ERROR_ACCESS_DENIED |
2315 | mov eax, ERROR_ACCESS_DENIED |
2313 | xor ebx, ebx |
2316 | xor ebx, ebx |
2314 | ret |
2317 | ret |
2315 | 2318 | ||
2316 | ;---------------------------------------------------------------- |
2319 | ;---------------------------------------------------------------- |
2317 | ; fat_CreateFolder - FAT implementation of creating a folder |
2320 | ; fat_CreateFolder - FAT implementation of creating a folder |
2318 | ; in: ebp = pointer to FAT structure |
2321 | ; in: ebp = pointer to FAT structure |
2319 | ; in: esi+[esp+4] = name |
2322 | ; in: esi+[esp+4] = name |
2320 | ; in: ebx = pointer to parameters from sysfunc 70 |
2323 | ; in: ebx = pointer to parameters from sysfunc 70 |
2321 | ; out: eax, ebx = return values for sysfunc 70 |
2324 | ; out: eax, ebx = return values for sysfunc 70 |
2322 | ;---------------------------------------------------------------- |
2325 | ;---------------------------------------------------------------- |
2323 | fat_CreateFolder: |
2326 | fat_CreateFolder: |
2324 | push 1 |
2327 | push 1 |
2325 | jmp fat_Rewrite.common |
2328 | jmp fat_Rewrite.common |
2326 | 2329 | ||
2327 | ;---------------------------------------------------------------- |
2330 | ;---------------------------------------------------------------- |
2328 | ; fat_Rewrite - FAT implementation of creating a new file |
2331 | ; fat_Rewrite - FAT implementation of creating a new file |
2329 | ; in: ebp = pointer to FAT structure |
2332 | ; in: ebp = pointer to FAT structure |
2330 | ; in: esi+[esp+4] = name |
2333 | ; in: esi+[esp+4] = name |
2331 | ; in: ebx = pointer to parameters from sysfunc 70 |
2334 | ; in: ebx = pointer to parameters from sysfunc 70 |
2332 | ; out: eax, ebx = return values for sysfunc 70 |
2335 | ; out: eax, ebx = return values for sysfunc 70 |
2333 | ;---------------------------------------------------------------- |
2336 | ;---------------------------------------------------------------- |
2334 | fat_Rewrite: |
2337 | fat_Rewrite: |
2335 | push 0 |
2338 | push 0 |
2336 | .common: |
2339 | .common: |
2337 | call fat_lock |
2340 | call fat_lock |
2338 | pop eax |
2341 | pop eax |
2339 | cmp byte [esi], 0 |
2342 | cmp byte [esi], 0 |
2340 | jz fshrad |
2343 | jz fshrad |
2341 | mov ecx, [ebx+12] |
2344 | mov ecx, [ebx+12] |
2342 | mov edx, [ebx+16] |
2345 | mov edx, [ebx+16] |
2343 | pushad |
2346 | pushad |
2344 | xor edi, edi |
2347 | xor edi, edi |
2345 | mov edx, [esp+4+20h] |
2348 | mov edx, [esp+4+20h] |
2346 | push esi |
2349 | push esi |
2347 | test edx, edx |
2350 | test edx, edx |
2348 | jz @f |
2351 | jz @f |
2349 | mov esi, edx |
2352 | mov esi, edx |
2350 | @@: |
2353 | @@: |
2351 | lodsb |
2354 | lodsb |
2352 | test al, al |
2355 | test al, al |
2353 | jz @f |
2356 | jz @f |
2354 | cmp al, '/' |
2357 | cmp al, '/' |
2355 | jnz @b |
2358 | jnz @b |
2356 | lea edi, [esi-1] |
2359 | lea edi, [esi-1] |
2357 | jmp @b |
2360 | jmp @b |
2358 | @@: |
2361 | @@: |
2359 | pop esi |
2362 | pop esi |
2360 | test edi, edi |
2363 | test edi, edi |
2361 | jnz .noroot |
2364 | jnz .noroot |
2362 | test edx, edx |
2365 | test edx, edx |
2363 | jnz .hasebp |
2366 | jnz .hasebp |
2364 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
2367 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
2365 | cmp [ebp+FAT.fs_type], 32 |
2368 | cmp [ebp+FAT.fs_type], 32 |
2366 | jz .pushnotroot |
2369 | jz .pushnotroot |
2367 | xor edx, edx |
2370 | xor edx, edx |
2368 | push edx |
2371 | push edx |
2369 | push fat1x_root_extend_dir |
2372 | push fat1x_root_extend_dir |
2370 | push fat1x_root_end_write |
2373 | push fat1x_root_end_write |
2371 | push fat1x_root_next_write |
2374 | push fat1x_root_next_write |
2372 | push fat1x_root_begin_write |
2375 | push fat1x_root_begin_write |
2373 | push edx |
2376 | push edx |
2374 | push edx |
2377 | push edx |
2375 | push fat1x_root_first |
2378 | push fat1x_root_first |
2376 | push fat1x_root_next |
2379 | push fat1x_root_next |
2377 | jmp .common1 |
2380 | jmp .common1 |
2378 | .hasebp: |
2381 | .hasebp: |
2379 | mov eax, ERROR_ACCESS_DENIED |
2382 | mov eax, ERROR_ACCESS_DENIED |
2380 | cmp byte [edx], 0 |
2383 | cmp byte [edx], 0 |
2381 | jz .ret1 |
2384 | jz .ret1 |
2382 | stdcall hd_find_lfn, 0 |
2385 | stdcall hd_find_lfn, 0 |
2383 | mov esi, [esp+4+20h] |
2386 | mov esi, [esp+4+20h] |
2384 | jc .ret1 |
2387 | jc .ret1 |
2385 | jmp .common0 |
2388 | jmp .common0 |
2386 | .noroot: |
2389 | .noroot: |
2387 | mov eax, ERROR_ACCESS_DENIED |
2390 | mov eax, ERROR_ACCESS_DENIED |
2388 | cmp byte [edi+1], 0 |
2391 | cmp byte [edi+1], 0 |
2389 | jz .ret1 |
2392 | jz .ret1 |
2390 | ; check existence |
2393 | ; check existence |
2391 | mov byte [edi], 0 |
2394 | mov byte [edi], 0 |
2392 | push edi |
2395 | push edi |
2393 | stdcall hd_find_lfn, [esp+4+24h] |
2396 | stdcall hd_find_lfn, [esp+4+24h] |
2394 | pop esi |
2397 | pop esi |
2395 | mov byte [esi], '/' |
2398 | mov byte [esi], '/' |
2396 | jnc @f |
2399 | jnc @f |
2397 | .notfound0: |
2400 | .notfound0: |
2398 | mov eax, ERROR_FILE_NOT_FOUND |
2401 | mov eax, ERROR_FILE_NOT_FOUND |
2399 | .ret1: |
2402 | .ret1: |
2400 | mov [esp+28], eax |
2403 | mov [esp+28], eax |
2401 | call fat_unlock |
2404 | call fat_unlock |
2402 | popad |
2405 | popad |
2403 | xor ebx, ebx |
2406 | xor ebx, ebx |
2404 | ret |
2407 | ret |
2405 | @@: |
2408 | @@: |
2406 | inc esi |
2409 | inc esi |
2407 | .common0: |
2410 | .common0: |
2408 | test byte [edi+11], 0x10 ; must be directory |
2411 | test byte [edi+11], 0x10 ; must be directory |
2409 | mov eax, ERROR_ACCESS_DENIED |
2412 | mov eax, ERROR_ACCESS_DENIED |
2410 | jz .ret1 |
2413 | jz .ret1 |
2411 | mov edx, [edi+20-2] |
2414 | mov edx, [edi+20-2] |
2412 | mov dx, [edi+26] ; ebp=cluster |
2415 | mov dx, [edi+26] ; ebp=cluster |
2413 | mov eax, ERROR_FAT_TABLE |
2416 | mov eax, ERROR_FAT_TABLE |
2414 | cmp edx, 2 |
2417 | cmp edx, 2 |
2415 | jb .ret1 |
2418 | jb .ret1 |
2416 | .pushnotroot: |
2419 | .pushnotroot: |
2417 | push edx |
2420 | push edx |
2418 | push fat_notroot_extend_dir |
2421 | push fat_notroot_extend_dir |
2419 | push fat_notroot_end_write |
2422 | push fat_notroot_end_write |
2420 | push fat_notroot_next_write |
2423 | push fat_notroot_next_write |
2421 | push fat_notroot_begin_write |
2424 | push fat_notroot_begin_write |
2422 | push 0 |
2425 | push 0 |
2423 | push edx |
2426 | push edx |
2424 | push fat_notroot_first |
2427 | push fat_notroot_first |
2425 | push fat_notroot_next |
2428 | push fat_notroot_next |
2426 | .common1: |
2429 | .common1: |
2427 | call fat_find_lfn |
2430 | call fat_find_lfn |
2428 | jc .notfound |
2431 | jc .notfound |
2429 | ; found |
2432 | ; found |
2430 | test byte [edi+11], 10h |
2433 | test byte [edi+11], 10h |
2431 | jz .exists_file |
2434 | jz .exists_file |
2432 | ; found directory; if we are creating directory, return OK, |
2435 | ; found directory; if we are creating directory, return OK, |
2433 | ; if we are creating file, say "access denied" |
2436 | ; if we are creating file, say "access denied" |
2434 | add esp, 36 |
2437 | add esp, 36 |
2435 | call fat_unlock |
2438 | call fat_unlock |
2436 | popad |
2439 | popad |
2437 | test al, al |
2440 | test al, al |
2438 | mov eax, ERROR_ACCESS_DENIED |
2441 | mov eax, ERROR_ACCESS_DENIED |
2439 | jz @f |
2442 | jz @f |
2440 | mov al, 0 |
2443 | mov al, 0 |
2441 | @@: |
2444 | @@: |
2442 | xor ebx, ebx |
2445 | xor ebx, ebx |
2443 | ret |
2446 | ret |
2444 | .exists_file: |
2447 | .exists_file: |
2445 | ; found file; if we are creating directory, return "access denied", |
2448 | ; found file; if we are creating directory, return "access denied", |
2446 | ; if we are creating file, delete existing file and continue |
2449 | ; if we are creating file, delete existing file and continue |
2447 | cmp byte [esp+36+28], 0 |
2450 | cmp byte [esp+36+28], 0 |
2448 | jz @f |
2451 | jz @f |
2449 | add esp, 36 |
2452 | add esp, 36 |
2450 | call fat_unlock |
2453 | call fat_unlock |
2451 | popad |
2454 | popad |
2452 | mov eax, ERROR_ACCESS_DENIED |
2455 | mov eax, ERROR_ACCESS_DENIED |
2453 | xor ebx, ebx |
2456 | xor ebx, ebx |
2454 | ret |
2457 | ret |
2455 | @@: |
2458 | @@: |
2456 | ; delete FAT chain |
2459 | ; delete FAT chain |
2457 | push edi |
2460 | push edi |
2458 | xor eax, eax |
2461 | xor eax, eax |
2459 | mov dword [edi+28], eax ; zero size |
2462 | mov dword [edi+28], eax ; zero size |
2460 | xor ecx, ecx |
2463 | xor ecx, ecx |
2461 | mov eax, [edi+20-2] |
2464 | mov eax, [edi+20-2] |
2462 | mov ax, [edi+26] |
2465 | mov ax, [edi+26] |
2463 | mov word [edi+20], cx |
2466 | mov word [edi+20], cx |
2464 | mov word [edi+26], cx |
2467 | mov word [edi+26], cx |
2465 | test eax, eax |
2468 | test eax, eax |
2466 | jz .done1 |
2469 | jz .done1 |
2467 | @@: |
2470 | @@: |
2468 | cmp eax, [ebp+FAT.fatRESERVED] |
2471 | cmp eax, [ebp+FAT.fatRESERVED] |
2469 | jae .done1 |
2472 | jae .done1 |
2470 | push edx |
2473 | push edx |
2471 | xor edx, edx |
2474 | xor edx, edx |
2472 | call set_FAT |
2475 | call set_FAT |
2473 | mov eax, edx |
2476 | mov eax, edx |
2474 | pop edx |
2477 | pop edx |
2475 | jc .done1 |
2478 | jc .done1 |
2476 | inc ecx |
2479 | inc ecx |
2477 | jmp @b |
2480 | jmp @b |
2478 | .done1: |
2481 | .done1: |
2479 | pop edi |
2482 | pop edi |
2480 | call get_time_for_file |
2483 | call get_time_for_file |
2481 | mov [edi+22], ax |
2484 | mov [edi+22], ax |
2482 | call get_date_for_file |
2485 | call get_date_for_file |
2483 | mov [edi+24], ax |
2486 | mov [edi+24], ax |
2484 | mov [edi+18], ax |
2487 | mov [edi+18], ax |
2485 | or byte [edi+11], 20h ; set 'archive' attribute |
2488 | or byte [edi+11], 20h ; set 'archive' attribute |
2486 | jmp .doit |
2489 | jmp .doit |
2487 | .notfound: |
2490 | .notfound: |
2488 | ; file is not found; generate short name |
2491 | ; file is not found; generate short name |
2489 | call fat_name_is_legal |
2492 | call fat_name_is_legal |
2490 | jc @f |
2493 | jc @f |
2491 | add esp, 36 |
2494 | add esp, 36 |
2492 | call fat_unlock |
2495 | call fat_unlock |
2493 | popad |
2496 | popad |
2494 | mov eax, ERROR_FILE_NOT_FOUND |
2497 | mov eax, ERROR_FILE_NOT_FOUND |
2495 | xor ebx, ebx |
2498 | xor ebx, ebx |
2496 | ret |
2499 | ret |
2497 | @@: |
2500 | @@: |
2498 | sub esp, 12 |
2501 | sub esp, 12 |
2499 | mov edi, esp |
2502 | mov edi, esp |
2500 | call fat_gen_short_name |
2503 | call fat_gen_short_name |
2501 | .test_short_name_loop: |
2504 | .test_short_name_loop: |
2502 | push esi edi ecx |
2505 | push esi edi ecx |
2503 | mov esi, edi |
2506 | mov esi, edi |
2504 | lea eax, [esp+12+12+8] |
2507 | lea eax, [esp+12+12+8] |
2505 | mov edx, [eax+24] |
2508 | mov edx, [eax+24] |
2506 | mov [eax], edx |
2509 | mov [eax], edx |
2507 | and dword [eax+4], 0 |
2510 | and dword [eax+4], 0 |
2508 | call dword [eax-4] |
2511 | call dword [eax-4] |
2509 | jc .found |
2512 | jc .found |
2510 | .test_short_name_entry: |
2513 | .test_short_name_entry: |
2511 | cmp byte [edi+11], 0xF |
2514 | cmp byte [edi+11], 0xF |
2512 | jz .test_short_name_cont |
2515 | jz .test_short_name_cont |
2513 | mov ecx, 11 |
2516 | mov ecx, 11 |
2514 | push esi edi |
2517 | push esi edi |
2515 | repz cmpsb |
2518 | repz cmpsb |
2516 | pop edi esi |
2519 | pop edi esi |
2517 | jz .short_name_found |
2520 | jz .short_name_found |
2518 | .test_short_name_cont: |
2521 | .test_short_name_cont: |
2519 | lea eax, [esp+12+12+8] |
2522 | lea eax, [esp+12+12+8] |
2520 | call dword [eax-8] |
2523 | call dword [eax-8] |
2521 | jnc .test_short_name_entry |
2524 | jnc .test_short_name_entry |
2522 | jmp .found |
2525 | jmp .found |
2523 | .short_name_found: |
2526 | .short_name_found: |
2524 | pop ecx edi esi |
2527 | pop ecx edi esi |
2525 | call fat_next_short_name |
2528 | call fat_next_short_name |
2526 | jnc .test_short_name_loop |
2529 | jnc .test_short_name_loop |
2527 | .disk_full: |
2530 | .disk_full: |
2528 | add esp, 12+36 |
2531 | add esp, 12+36 |
2529 | call fat_unlock |
2532 | call fat_unlock |
2530 | popa |
2533 | popa |
2531 | mov eax, ERROR_DISK_FULL |
2534 | mov eax, ERROR_DISK_FULL |
2532 | xor ebx, ebx |
2535 | xor ebx, ebx |
2533 | ret |
2536 | ret |
2534 | .found: |
2537 | .found: |
2535 | pop ecx edi esi |
2538 | pop ecx edi esi |
2536 | ; now find space in directory |
2539 | ; now find space in directory |
2537 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
2540 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
2538 | mov al, '~' |
2541 | mov al, '~' |
2539 | push ecx edi |
2542 | push ecx edi |
2540 | mov ecx, 8 |
2543 | mov ecx, 8 |
2541 | repnz scasb |
2544 | repnz scasb |
2542 | movi eax, 1 ; 1 entry |
2545 | movi eax, 1 ; 1 entry |
2543 | jnz .notilde |
2546 | jnz .notilde |
2544 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
2547 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
2545 | xor eax, eax |
2548 | xor eax, eax |
2546 | @@: |
2549 | @@: |
2547 | cmp byte [esi], 0 |
2550 | cmp byte [esi], 0 |
2548 | jz @f |
2551 | jz @f |
2549 | inc esi |
2552 | inc esi |
2550 | inc eax |
2553 | inc eax |
2551 | jmp @b |
2554 | jmp @b |
2552 | @@: |
2555 | @@: |
2553 | sub esi, eax |
2556 | sub esi, eax |
2554 | add eax, 12+13 |
2557 | add eax, 12+13 |
2555 | mov ecx, 13 |
2558 | mov ecx, 13 |
2556 | push edx |
2559 | push edx |
2557 | cdq |
2560 | cdq |
2558 | div ecx |
2561 | div ecx |
2559 | pop edx |
2562 | pop edx |
2560 | .notilde: |
2563 | .notilde: |
2561 | push -1 |
2564 | push -1 |
2562 | push -1 |
2565 | push -1 |
2563 | push -1 |
2566 | push -1 |
2564 | ; find |
2567 | ; find |
2565 | xor ecx, ecx |
2568 | xor ecx, ecx |
2566 | push eax |
2569 | push eax |
2567 | lea eax, [esp+16+8+12+8] |
2570 | lea eax, [esp+16+8+12+8] |
2568 | mov edx, [eax+24] |
2571 | mov edx, [eax+24] |
2569 | mov [eax], edx |
2572 | mov [eax], edx |
2570 | and dword [eax+4], 0 |
2573 | and dword [eax+4], 0 |
2571 | call dword [eax-4] |
2574 | call dword [eax-4] |
2572 | pop eax |
2575 | pop eax |
2573 | jnc .scan_dir |
2576 | jnc .scan_dir |
2574 | .fsfrfe3: |
2577 | .fsfrfe3: |
2575 | add esp, 12+8+12+36 |
2578 | add esp, 12+8+12+36 |
2576 | call fat_unlock |
2579 | call fat_unlock |
2577 | popad |
2580 | popad |
2578 | mov eax, ERROR_DEVICE |
2581 | mov eax, ERROR_DEVICE |
2579 | xor ebx, ebx |
2582 | xor ebx, ebx |
2580 | ret |
2583 | ret |
2581 | .scan_dir: |
2584 | .scan_dir: |
2582 | cmp byte [edi], 0 |
2585 | cmp byte [edi], 0 |
2583 | jz .free |
2586 | jz .free |
2584 | cmp byte [edi], 0xE5 |
2587 | cmp byte [edi], 0xE5 |
2585 | jz .free |
2588 | jz .free |
2586 | xor ecx, ecx |
2589 | xor ecx, ecx |
2587 | .scan_cont: |
2590 | .scan_cont: |
2588 | push eax |
2591 | push eax |
2589 | lea eax, [esp+16+8+12+8] |
2592 | lea eax, [esp+16+8+12+8] |
2590 | call dword [eax-8] |
2593 | call dword [eax-8] |
2591 | mov edx, eax |
2594 | mov edx, eax |
2592 | pop eax |
2595 | pop eax |
2593 | jnc .scan_dir |
2596 | jnc .scan_dir |
2594 | cmp edx, ERROR_DEVICE |
2597 | cmp edx, ERROR_DEVICE |
2595 | jz .fsfrfe3 |
2598 | jz .fsfrfe3 |
2596 | push eax |
2599 | push eax |
2597 | lea eax, [esp+16+8+12+8] |
2600 | lea eax, [esp+16+8+12+8] |
2598 | call dword [eax+20] ; extend directory |
2601 | call dword [eax+20] ; extend directory |
2599 | pop eax |
2602 | pop eax |
2600 | jnc .scan_dir |
2603 | jnc .scan_dir |
2601 | add esp, 12+8+12+36 |
2604 | add esp, 12+8+12+36 |
2602 | call fat_unlock |
2605 | call fat_unlock |
2603 | popad |
2606 | popad |
2604 | mov eax, ERROR_DISK_FULL |
2607 | mov eax, ERROR_DISK_FULL |
2605 | xor ebx, ebx |
2608 | xor ebx, ebx |
2606 | ret |
2609 | ret |
2607 | .free: |
2610 | .free: |
2608 | test ecx, ecx |
2611 | test ecx, ecx |
2609 | jnz @f |
2612 | jnz @f |
2610 | mov [esp], edi |
2613 | mov [esp], edi |
2611 | mov ecx, [esp+12+8+12+8] |
2614 | mov ecx, [esp+12+8+12+8] |
2612 | mov [esp+4], ecx |
2615 | mov [esp+4], ecx |
2613 | mov ecx, [esp+12+8+12+12] |
2616 | mov ecx, [esp+12+8+12+12] |
2614 | mov [esp+8], ecx |
2617 | mov [esp+8], ecx |
2615 | xor ecx, ecx |
2618 | xor ecx, ecx |
2616 | @@: |
2619 | @@: |
2617 | inc ecx |
2620 | inc ecx |
2618 | cmp ecx, eax |
2621 | cmp ecx, eax |
2619 | jb .scan_cont |
2622 | jb .scan_cont |
2620 | ; found! |
2623 | ; found! |
2621 | push esi ecx |
2624 | push esi ecx |
2622 | ; If creating a directory, allocate one data cluster now and fail immediately |
2625 | ; If creating a directory, allocate one data cluster now and fail immediately |
2623 | ; if this is impossible. This prevents from creating an invalid directory entry |
2626 | ; if this is impossible. This prevents from creating an invalid directory entry |
2624 | ; on a full disk. |
2627 | ; on a full disk. |
2625 | ; yup, the argument is quite non-intuitive... but what should I do if |
2628 | ; yup, the argument is quite non-intuitive... but what should I do if |
2626 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
2629 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
2627 | ; which in turn is filled with 0 in fat_Rewrite and 1 in fat_CreateFolder. |
2630 | ; which in turn is filled with 0 in fat_Rewrite and 1 in fat_CreateFolder. |
2628 | cmp byte [esp+8+12+8+12+36+28], 0 |
2631 | cmp byte [esp+8+12+8+12+36+28], 0 |
2629 | jz .no.preallocate.folder.data |
2632 | jz .no.preallocate.folder.data |
2630 | call get_free_FAT |
2633 | call get_free_FAT |
2631 | jnc @f |
2634 | jnc @f |
2632 | add esp, 8+12+8 |
2635 | add esp, 8+12+8 |
2633 | jmp .disk_full |
2636 | jmp .disk_full |
2634 | @@: |
2637 | @@: |
2635 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
2638 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
2636 | .no.preallocate.folder.data: |
2639 | .no.preallocate.folder.data: |
2637 | ; calculate name checksum |
2640 | ; calculate name checksum |
2638 | mov esi, [esp+8+12] |
2641 | mov esi, [esp+8+12] |
2639 | mov ecx, 11 |
2642 | mov ecx, 11 |
2640 | xor eax, eax |
2643 | xor eax, eax |
2641 | @@: |
2644 | @@: |
2642 | ror al, 1 |
2645 | ror al, 1 |
2643 | add al, [esi] |
2646 | add al, [esi] |
2644 | inc esi |
2647 | inc esi |
2645 | loop @b |
2648 | loop @b |
2646 | pop ecx esi |
2649 | pop ecx esi |
2647 | pop edi |
2650 | pop edi |
2648 | pop dword [esp+8+12+12] |
2651 | pop dword [esp+8+12+12] |
2649 | pop dword [esp+8+12+12] |
2652 | pop dword [esp+8+12+12] |
2650 | ; edi points to first entry in free chunk |
2653 | ; edi points to first entry in free chunk |
2651 | dec ecx |
2654 | dec ecx |
2652 | jz .nolfn |
2655 | jz .nolfn |
2653 | push esi |
2656 | push esi |
2654 | push eax |
2657 | push eax |
2655 | lea eax, [esp+8+8+12+8] |
2658 | lea eax, [esp+8+8+12+8] |
2656 | call dword [eax+8] ; begin write |
2659 | call dword [eax+8] ; begin write |
2657 | mov al, 40h |
2660 | mov al, 40h |
2658 | .writelfn: |
2661 | .writelfn: |
2659 | or al, cl |
2662 | or al, cl |
2660 | mov esi, [esp+4] |
2663 | mov esi, [esp+4] |
2661 | push ecx |
2664 | push ecx |
2662 | dec ecx |
2665 | dec ecx |
2663 | imul ecx, 13 |
2666 | imul ecx, 13 |
2664 | add esi, ecx |
2667 | add esi, ecx |
2665 | stosb |
2668 | stosb |
2666 | mov cl, 5 |
2669 | mov cl, 5 |
2667 | call fat_read_symbols |
2670 | call fat_read_symbols |
2668 | mov ax, 0xF |
2671 | mov ax, 0xF |
2669 | stosw |
2672 | stosw |
2670 | mov al, [esp+4] |
2673 | mov al, [esp+4] |
2671 | stosb |
2674 | stosb |
2672 | mov cl, 6 |
2675 | mov cl, 6 |
2673 | call fat_read_symbols |
2676 | call fat_read_symbols |
2674 | xor eax, eax |
2677 | xor eax, eax |
2675 | stosw |
2678 | stosw |
2676 | mov cl, 2 |
2679 | mov cl, 2 |
2677 | call fat_read_symbols |
2680 | call fat_read_symbols |
2678 | pop ecx |
2681 | pop ecx |
2679 | lea eax, [esp+8+8+12+8] |
2682 | lea eax, [esp+8+8+12+8] |
2680 | call dword [eax+12] ; next write |
2683 | call dword [eax+12] ; next write |
2681 | xor eax, eax |
2684 | xor eax, eax |
2682 | loop .writelfn |
2685 | loop .writelfn |
2683 | pop eax |
2686 | pop eax |
2684 | pop esi |
2687 | pop esi |
2685 | ; lea eax, [esp+8+12+8] |
2688 | ; lea eax, [esp+8+12+8] |
2686 | ; call dword [eax+16] ; end write |
2689 | ; call dword [eax+16] ; end write |
2687 | .nolfn: |
2690 | .nolfn: |
2688 | xchg esi, [esp] |
2691 | xchg esi, [esp] |
2689 | mov ecx, 11 |
2692 | mov ecx, 11 |
2690 | rep movsb |
2693 | rep movsb |
2691 | mov word [edi], 20h ; attributes |
2694 | mov word [edi], 20h ; attributes |
2692 | sub edi, 11 |
2695 | sub edi, 11 |
2693 | pop esi ecx |
2696 | pop esi ecx |
2694 | add esp, 12 |
2697 | add esp, 12 |
2695 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
2698 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
2696 | call get_time_for_file |
2699 | call get_time_for_file |
2697 | mov [edi+14], ax ; creation time |
2700 | mov [edi+14], ax ; creation time |
2698 | mov [edi+22], ax ; last write time |
2701 | mov [edi+22], ax ; last write time |
2699 | call get_date_for_file |
2702 | call get_date_for_file |
2700 | mov [edi+16], ax ; creation date |
2703 | mov [edi+16], ax ; creation date |
2701 | mov [edi+24], ax ; last write date |
2704 | mov [edi+24], ax ; last write date |
2702 | mov [edi+18], ax ; last access date |
2705 | mov [edi+18], ax ; last access date |
2703 | xor ecx, ecx |
2706 | xor ecx, ecx |
2704 | mov word [edi+20], cx ; high word of cluster |
2707 | mov word [edi+20], cx ; high word of cluster |
2705 | mov word [edi+26], cx ; low word of cluster - to be filled |
2708 | mov word [edi+26], cx ; low word of cluster - to be filled |
2706 | mov dword [edi+28], ecx ; file size - to be filled |
2709 | mov dword [edi+28], ecx ; file size - to be filled |
2707 | cmp byte [esp+36+28], cl |
2710 | cmp byte [esp+36+28], cl |
2708 | jz .doit |
2711 | jz .doit |
2709 | ; create directory |
2712 | ; create directory |
2710 | mov byte [edi+11], 10h ; attributes: folder |
2713 | mov byte [edi+11], 10h ; attributes: folder |
2711 | mov esi, edi |
2714 | mov esi, edi |
2712 | lea eax, [esp+8] |
2715 | lea eax, [esp+8] |
2713 | call dword [eax+16] ; flush directory |
2716 | call dword [eax+16] ; flush directory |
2714 | mov eax, [esp+36+20] ; extract saved cluster |
2717 | mov eax, [esp+36+20] ; extract saved cluster |
2715 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
2718 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
2716 | push ecx |
2719 | push ecx |
2717 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2720 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2718 | shl ecx, 9 |
2721 | shl ecx, 9 |
2719 | push ecx |
2722 | push ecx |
2720 | push edi |
2723 | push edi |
2721 | jmp .doit2 |
2724 | jmp .doit2 |
2722 | .doit: |
2725 | .doit: |
2723 | mov esi, [esp+36+20] |
2726 | mov esi, [esp+36+20] |
2724 | lea eax, [esp+8] |
2727 | lea eax, [esp+8] |
2725 | call dword [eax+16] ; flush directory |
2728 | call dword [eax+16] ; flush directory |
2726 | push ecx |
2729 | push ecx |
2727 | mov ecx, [esp+4+36+24] |
2730 | mov ecx, [esp+4+36+24] |
2728 | push ecx |
2731 | push ecx |
2729 | push edi |
2732 | push edi |
2730 | test ecx, ecx |
2733 | test ecx, ecx |
2731 | jz .done |
2734 | jz .done |
2732 | call get_free_FAT |
2735 | call get_free_FAT |
2733 | jc .diskfull |
2736 | jc .diskfull |
2734 | .doit2: |
2737 | .doit2: |
2735 | push eax |
2738 | push eax |
2736 | mov [edi+26], ax |
2739 | mov [edi+26], ax |
2737 | shr eax, 16 |
2740 | shr eax, 16 |
2738 | mov [edi+20], ax |
2741 | mov [edi+20], ax |
2739 | lea eax, [esp+16+8] |
2742 | lea eax, [esp+16+8] |
2740 | call dword [eax+16] ; flush directory |
2743 | call dword [eax+16] ; flush directory |
2741 | pop eax |
2744 | pop eax |
2742 | push edx |
2745 | push edx |
2743 | mov edx, [ebp+FAT.fatEND] |
2746 | mov edx, [ebp+FAT.fatEND] |
2744 | call set_FAT |
2747 | call set_FAT |
2745 | pop edx |
2748 | pop edx |
2746 | .write_cluster: |
2749 | .write_cluster: |
2747 | push eax |
2750 | push eax |
2748 | dec eax |
2751 | dec eax |
2749 | dec eax |
2752 | dec eax |
2750 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2753 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2751 | add eax, [ebp+FAT.DATA_START] |
2754 | add eax, [ebp+FAT.DATA_START] |
2752 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
2755 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
2753 | ; write data |
2756 | ; write data |
2754 | .write_sector: |
2757 | .write_sector: |
2755 | cmp byte [esp+20+36+28], 0 |
2758 | cmp byte [esp+20+36+28], 0 |
2756 | jnz .writedir |
2759 | jnz .writedir |
2757 | mov ecx, 512 |
2760 | mov ecx, 512 |
2758 | cmp dword [esp+12], ecx |
2761 | cmp dword [esp+12], ecx |
2759 | jb .writeshort |
2762 | jb .writeshort |
2760 | ; we can write directly from given buffer |
2763 | ; we can write directly from given buffer |
2761 | mov ebx, esi |
2764 | mov ebx, esi |
2762 | add esi, ecx |
2765 | add esi, ecx |
2763 | jmp .writecommon |
2766 | jmp .writecommon |
2764 | .writeshort: |
2767 | .writeshort: |
2765 | mov ecx, [esp+12] |
2768 | mov ecx, [esp+12] |
2766 | push ecx |
2769 | push ecx |
2767 | lea edi, [ebp+FAT.buffer] |
2770 | lea edi, [ebp+FAT.buffer] |
2768 | mov ebx, edi |
2771 | mov ebx, edi |
2769 | rep movsb |
2772 | rep movsb |
2770 | .writedircont: |
2773 | .writedircont: |
2771 | lea ecx, [ebp+FAT.buffer+0x200] |
2774 | lea ecx, [ebp+FAT.buffer+0x200] |
2772 | sub ecx, edi |
2775 | sub ecx, edi |
2773 | push eax |
2776 | push eax |
2774 | xor eax, eax |
2777 | xor eax, eax |
2775 | rep stosb |
2778 | rep stosb |
2776 | pop eax |
2779 | pop eax |
2777 | pop ecx |
2780 | pop ecx |
2778 | .writecommon: |
2781 | .writecommon: |
2779 | push eax |
2782 | push eax |
2780 | call fs_write32_app |
2783 | call fs_write32_app |
2781 | test eax, eax |
2784 | test eax, eax |
2782 | pop eax |
2785 | pop eax |
2783 | jnz .writeerr |
2786 | jnz .writeerr |
2784 | inc eax |
2787 | inc eax |
2785 | sub dword [esp+12], ecx |
2788 | sub dword [esp+12], ecx |
2786 | jz .writedone |
2789 | jz .writedone |
2787 | dec dword [esp] |
2790 | dec dword [esp] |
2788 | jnz .write_sector |
2791 | jnz .write_sector |
2789 | pop eax |
2792 | pop eax |
2790 | ; allocate new cluster |
2793 | ; allocate new cluster |
2791 | pop eax |
2794 | pop eax |
2792 | mov ecx, eax |
2795 | mov ecx, eax |
2793 | call get_free_FAT |
2796 | call get_free_FAT |
2794 | jc .diskfull |
2797 | jc .diskfull |
2795 | push edx |
2798 | push edx |
2796 | mov edx, [ebp+FAT.fatEND] |
2799 | mov edx, [ebp+FAT.fatEND] |
2797 | call set_FAT |
2800 | call set_FAT |
2798 | xchg eax, ecx |
2801 | xchg eax, ecx |
2799 | mov edx, ecx |
2802 | mov edx, ecx |
2800 | call set_FAT |
2803 | call set_FAT |
2801 | pop edx |
2804 | pop edx |
2802 | xchg eax, ecx |
2805 | xchg eax, ecx |
2803 | jmp .write_cluster |
2806 | jmp .write_cluster |
2804 | .diskfull: |
2807 | .diskfull: |
2805 | mov eax, ERROR_DISK_FULL |
2808 | mov eax, ERROR_DISK_FULL |
2806 | jmp .ret |
2809 | jmp .ret |
2807 | .writeerr: |
2810 | .writeerr: |
2808 | pop eax eax |
2811 | pop eax eax |
2809 | sub esi, ecx |
2812 | sub esi, ecx |
2810 | mov eax, ERROR_DEVICE |
2813 | mov eax, ERROR_DEVICE |
2811 | jmp .ret |
2814 | jmp .ret |
2812 | .writedone: |
2815 | .writedone: |
2813 | pop eax eax |
2816 | pop eax eax |
2814 | .done: |
2817 | .done: |
2815 | xor eax, eax |
2818 | xor eax, eax |
2816 | .ret: |
2819 | .ret: |
2817 | pop edi ecx |
2820 | pop edi ecx |
2818 | sub esi, [esp+4+36+20] |
2821 | sub esi, [esp+4+36+20] |
2819 | mov [esp+4+36+28], eax |
2822 | mov [esp+4+36+28], eax |
2820 | mov [esp+4+36+16], esi |
2823 | mov [esp+4+36+16], esi |
2821 | lea eax, [esp+12] |
2824 | lea eax, [esp+12] |
2822 | call dword [eax+8] |
2825 | call dword [eax+8] |
2823 | mov [edi+28], esi |
2826 | mov [edi+28], esi |
2824 | call dword [eax+16] |
2827 | call dword [eax+16] |
2825 | mov [esp+36+16], ebx |
2828 | mov [esp+36+16], ebx |
2826 | lea eax, [esi+511] |
2829 | lea eax, [esi+511] |
2827 | shr eax, 9 |
2830 | shr eax, 9 |
2828 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2831 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2829 | lea eax, [eax+ecx-1] |
2832 | lea eax, [eax+ecx-1] |
2830 | xor edx, edx |
2833 | xor edx, edx |
2831 | div ecx |
2834 | div ecx |
2832 | pop ecx |
2835 | pop ecx |
2833 | sub ecx, eax |
2836 | sub ecx, eax |
2834 | call add_disk_free_space |
2837 | call add_disk_free_space |
2835 | add esp, 36 |
2838 | add esp, 36 |
2836 | call update_disk |
2839 | call update_disk |
2837 | call fat_unlock |
2840 | call fat_unlock |
2838 | popad |
2841 | popad |
2839 | ret |
2842 | ret |
2840 | .writedir: |
2843 | .writedir: |
2841 | push 512 |
2844 | push 512 |
2842 | lea edi, [ebp+FAT.buffer] |
2845 | lea edi, [ebp+FAT.buffer] |
2843 | mov ebx, edi |
2846 | mov ebx, edi |
2844 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2847 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2845 | shl ecx, 9 |
2848 | shl ecx, 9 |
2846 | cmp ecx, [esp+16] |
2849 | cmp ecx, [esp+16] |
2847 | jnz .writedircont |
2850 | jnz .writedircont |
2848 | dec dword [esp+20] |
2851 | dec dword [esp+20] |
2849 | push esi |
2852 | push esi |
2850 | mov ecx, 32/4 |
2853 | mov ecx, 32/4 |
2851 | rep movsd |
2854 | rep movsd |
2852 | pop esi |
2855 | pop esi |
2853 | mov dword [edi-32], '. ' |
2856 | mov dword [edi-32], '. ' |
2854 | mov dword [edi-32+4], ' ' |
2857 | mov dword [edi-32+4], ' ' |
2855 | mov dword [edi-32+8], ' ' |
2858 | mov dword [edi-32+8], ' ' |
2856 | mov byte [edi-32+11], 10h |
2859 | mov byte [edi-32+11], 10h |
2857 | push esi |
2860 | push esi |
2858 | mov ecx, 32/4 |
2861 | mov ecx, 32/4 |
2859 | rep movsd |
2862 | rep movsd |
2860 | pop esi |
2863 | pop esi |
2861 | mov dword [edi-32], '.. ' |
2864 | mov dword [edi-32], '.. ' |
2862 | mov dword [edi-32+4], ' ' |
2865 | mov dword [edi-32+4], ' ' |
2863 | mov dword [edi-32+8], ' ' |
2866 | mov dword [edi-32+8], ' ' |
2864 | mov byte [edi-32+11], 10h |
2867 | mov byte [edi-32+11], 10h |
2865 | mov ecx, [esp+20+36] |
2868 | mov ecx, [esp+20+36] |
2866 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
2869 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
2867 | jnz @f |
2870 | jnz @f |
2868 | xor ecx, ecx |
2871 | xor ecx, ecx |
2869 | @@: |
2872 | @@: |
2870 | mov word [edi-32+26], cx |
2873 | mov word [edi-32+26], cx |
2871 | shr ecx, 16 |
2874 | shr ecx, 16 |
2872 | mov [edi-32+20], cx |
2875 | mov [edi-32+20], cx |
2873 | jmp .writedircont |
2876 | jmp .writedircont |
2874 | 2877 | ||
2875 | fat_read_symbol: |
2878 | fat_read_symbol: |
2876 | or ax, -1 |
2879 | or ax, -1 |
2877 | test esi, esi |
2880 | test esi, esi |
2878 | jz .retFFFF |
2881 | jz .retFFFF |
2879 | lodsb |
2882 | lodsb |
2880 | test al, al |
2883 | test al, al |
2881 | jnz ansi2uni_char |
2884 | jnz ansi2uni_char |
2882 | xor eax, eax |
2885 | xor eax, eax |
2883 | xor esi, esi |
2886 | xor esi, esi |
2884 | .retFFFF: |
2887 | .retFFFF: |
2885 | ret |
2888 | ret |
2886 | 2889 | ||
2887 | fat_read_symbols: |
2890 | fat_read_symbols: |
2888 | call fat_read_symbol |
2891 | call fat_read_symbol |
2889 | stosw |
2892 | stosw |
2890 | loop fat_read_symbols |
2893 | loop fat_read_symbols |
2891 | ret |
2894 | ret |
2892 | 2895 | ||
2893 | 2896 | ||
2894 | fat_Write.access_denied: |
2897 | fat_Write.access_denied: |
2895 | push ERROR_ACCESS_DENIED |
2898 | push ERROR_ACCESS_DENIED |
2896 | fat_Write.ret0: |
2899 | fat_Write.ret0: |
2897 | pop eax |
2900 | pop eax |
2898 | xor ebx, ebx |
2901 | xor ebx, ebx |
2899 | ret |
2902 | ret |
2900 | 2903 | ||
2901 | fat_Write.ret11: |
2904 | fat_Write.ret11: |
2902 | push ERROR_DEVICE |
2905 | push ERROR_DEVICE |
2903 | jmp fat_Write.ret0 |
2906 | jmp fat_Write.ret0 |
2904 | 2907 | ||
2905 | ;---------------------------------------------------------------- |
2908 | ;---------------------------------------------------------------- |
2906 | ; fat_Write - FAT implementation of writing to file |
2909 | ; fat_Write - FAT implementation of writing to file |
2907 | ; in: ebp = pointer to FAT structure |
2910 | ; in: ebp = pointer to FAT structure |
2908 | ; in: esi+[esp+4] = name |
2911 | ; in: esi+[esp+4] = name |
2909 | ; in: ebx = pointer to parameters from sysfunc 70 |
2912 | ; in: ebx = pointer to parameters from sysfunc 70 |
2910 | ; out: eax, ebx = return values for sysfunc 70 |
2913 | ; out: eax, ebx = return values for sysfunc 70 |
2911 | ;---------------------------------------------------------------- |
2914 | ;---------------------------------------------------------------- |
2912 | fat_Write: |
2915 | fat_Write: |
2913 | cmp byte [esi], 0 |
2916 | cmp byte [esi], 0 |
2914 | jz .access_denied |
2917 | jz .access_denied |
2915 | call fat_lock |
2918 | call fat_lock |
2916 | push edi |
2919 | push edi |
2917 | stdcall hd_find_lfn, [esp+4+4] |
2920 | stdcall hd_find_lfn, [esp+4+4] |
2918 | jnc .found |
2921 | jnc .found |
2919 | pop edi |
2922 | pop edi |
2920 | push eax |
2923 | push eax |
2921 | call fat_unlock |
2924 | call fat_unlock |
2922 | jmp .ret0 |
2925 | jmp .ret0 |
2923 | .found: |
2926 | .found: |
2924 | ; FAT does not support files larger than 4GB |
2927 | ; FAT does not support files larger than 4GB |
2925 | cmp dword [ebx+8], 0 |
2928 | cmp dword [ebx+8], 0 |
2926 | jz @f |
2929 | jz @f |
2927 | .eof: |
2930 | .eof: |
2928 | pop edi |
2931 | pop edi |
2929 | push ERROR_END_OF_FILE |
2932 | push ERROR_END_OF_FILE |
2930 | call fat_unlock |
2933 | call fat_unlock |
2931 | jmp .ret0 |
2934 | jmp .ret0 |
2932 | @@: |
2935 | @@: |
2933 | mov ecx, [ebx+12] |
2936 | mov ecx, [ebx+12] |
2934 | mov edx, [ebx+16] |
2937 | mov edx, [ebx+16] |
2935 | mov ebx, [ebx+4] |
2938 | mov ebx, [ebx+4] |
2936 | ; now edi points to direntry, ebx=start byte to write, |
2939 | ; now edi points to direntry, ebx=start byte to write, |
2937 | ; ecx=number of bytes to write, edx=data pointer |
2940 | ; ecx=number of bytes to write, edx=data pointer |
2938 | 2941 | ||
2939 | ; extend file if needed |
2942 | ; extend file if needed |
2940 | add ecx, ebx |
2943 | add ecx, ebx |
2941 | jc .eof ; FAT does not support files larger than 4GB |
2944 | jc .eof ; FAT does not support files larger than 4GB |
2942 | push edx |
2945 | push edx |
2943 | push eax ; save directory sector |
2946 | push eax ; save directory sector |
2944 | push 0 ; return value=0 |
2947 | push 0 ; return value=0 |
2945 | 2948 | ||
2946 | call get_time_for_file |
2949 | call get_time_for_file |
2947 | mov [edi+22], ax ; last write time |
2950 | mov [edi+22], ax ; last write time |
2948 | call get_date_for_file |
2951 | call get_date_for_file |
2949 | mov [edi+24], ax ; last write date |
2952 | mov [edi+24], ax ; last write date |
2950 | mov [edi+18], ax ; last access date |
2953 | mov [edi+18], ax ; last access date |
2951 | 2954 | ||
2952 | push dword [edi+28] ; save current file size |
2955 | push dword [edi+28] ; save current file size |
2953 | cmp ecx, [edi+28] |
2956 | cmp ecx, [edi+28] |
2954 | jbe .length_ok |
2957 | jbe .length_ok |
2955 | cmp ecx, ebx |
2958 | cmp ecx, ebx |
2956 | jz .length_ok |
2959 | jz .length_ok |
2957 | call hd_extend_file |
2960 | call hd_extend_file |
2958 | jnc .length_ok |
2961 | jnc .length_ok |
2959 | mov [esp+4], eax |
2962 | mov [esp+4], eax |
2960 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
2963 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
2961 | ; First two cases are fatal errors, in third case we may write some data |
2964 | ; First two cases are fatal errors, in third case we may write some data |
2962 | cmp al, ERROR_DISK_FULL |
2965 | cmp al, ERROR_DISK_FULL |
2963 | jz .disk_full |
2966 | jz .disk_full |
2964 | call fat_unlock |
2967 | call fat_unlock |
2965 | pop eax |
2968 | pop eax |
2966 | pop eax |
2969 | pop eax |
2967 | pop ecx |
2970 | pop ecx |
2968 | pop edx |
2971 | pop edx |
2969 | pop edi |
2972 | pop edi |
2970 | xor ebx, ebx |
2973 | xor ebx, ebx |
2971 | ret |
2974 | ret |
2972 | .disk_full: |
2975 | .disk_full: |
2973 | ; correct number of bytes to write |
2976 | ; correct number of bytes to write |
2974 | mov ecx, [edi+28] |
2977 | mov ecx, [edi+28] |
2975 | cmp ecx, ebx |
2978 | cmp ecx, ebx |
2976 | ja .length_ok |
2979 | ja .length_ok |
2977 | push 0 |
2980 | push 0 |
2978 | .ret: |
2981 | .ret: |
2979 | pop eax |
2982 | pop eax |
2980 | sub edx, [esp+12] |
2983 | sub edx, [esp+12] |
2981 | mov ebx, edx ; ebx=number of written bytes |
2984 | mov ebx, edx ; ebx=number of written bytes |
2982 | call update_disk |
2985 | call update_disk |
2983 | test eax, eax |
2986 | test eax, eax |
2984 | jz @f |
2987 | jz @f |
2985 | mov byte [esp+4], ERROR_DEVICE |
2988 | mov byte [esp+4], ERROR_DEVICE |
2986 | @@: |
2989 | @@: |
2987 | call fat_unlock |
2990 | call fat_unlock |
2988 | pop eax |
2991 | pop eax |
2989 | pop eax |
2992 | pop eax |
2990 | pop ecx |
2993 | pop ecx |
2991 | pop edx |
2994 | pop edx |
2992 | pop edi |
2995 | pop edi |
2993 | ret |
2996 | ret |
2994 | .length_ok: |
2997 | .length_ok: |
2995 | mov esi, [edi+28] |
2998 | mov esi, [edi+28] |
2996 | mov eax, [edi+20-2] |
2999 | mov eax, [edi+20-2] |
2997 | mov ax, [edi+26] |
3000 | mov ax, [edi+26] |
2998 | mov edi, eax ; edi=current cluster |
3001 | mov edi, eax ; edi=current cluster |
2999 | push 0 ; current sector in cluster |
3002 | push 0 ; current sector in cluster |
3000 | ; save directory |
3003 | ; save directory |
3001 | mov eax, [esp+12] |
3004 | mov eax, [esp+12] |
3002 | push ebx |
3005 | push ebx |
3003 | lea ebx, [ebp+FAT.buffer] |
3006 | lea ebx, [ebp+FAT.buffer] |
3004 | call fs_write32_sys |
3007 | call fs_write32_sys |
3005 | pop ebx |
3008 | pop ebx |
3006 | test eax, eax |
3009 | test eax, eax |
3007 | jz @f |
3010 | jz @f |
3008 | .device_err: |
3011 | .device_err: |
3009 | mov byte [esp+8], ERROR_DEVICE |
3012 | mov byte [esp+8], ERROR_DEVICE |
3010 | jmp .ret |
3013 | jmp .ret |
3011 | .fat_err: |
3014 | .fat_err: |
3012 | mov byte [esp+8], ERROR_FAT_TABLE |
3015 | mov byte [esp+8], ERROR_FAT_TABLE |
3013 | jmp .ret |
3016 | jmp .ret |
3014 | @@: |
3017 | @@: |
3015 | 3018 | ||
3016 | ; now ebx=start pos, ecx=end pos, both lie inside file |
3019 | ; now ebx=start pos, ecx=end pos, both lie inside file |
3017 | sub ecx, ebx |
3020 | sub ecx, ebx |
3018 | jz .ret |
3021 | jz .ret |
3019 | .write_loop: |
3022 | .write_loop: |
3020 | ; skip unmodified sectors |
3023 | ; skip unmodified sectors |
3021 | cmp dword [esp+4], 0x200 |
3024 | cmp dword [esp+4], 0x200 |
3022 | jb .modify |
3025 | jb .modify |
3023 | sub ebx, 0x200 |
3026 | sub ebx, 0x200 |
3024 | jae .skip |
3027 | jae .skip |
3025 | add ebx, 0x200 |
3028 | add ebx, 0x200 |
3026 | .modify: |
3029 | .modify: |
3027 | ; get length of data in current sector |
3030 | ; get length of data in current sector |
3028 | push ecx |
3031 | push ecx |
3029 | sub ebx, 0x200 |
3032 | sub ebx, 0x200 |
3030 | jb .hasdata |
3033 | jb .hasdata |
3031 | neg ebx |
3034 | neg ebx |
3032 | xor ecx, ecx |
3035 | xor ecx, ecx |
3033 | jmp @f |
3036 | jmp @f |
3034 | .hasdata: |
3037 | .hasdata: |
3035 | neg ebx |
3038 | neg ebx |
3036 | cmp ecx, ebx |
3039 | cmp ecx, ebx |
3037 | jbe @f |
3040 | jbe @f |
3038 | mov ecx, ebx |
3041 | mov ecx, ebx |
3039 | @@: |
3042 | @@: |
3040 | ; get current sector number |
3043 | ; get current sector number |
3041 | mov eax, edi |
3044 | mov eax, edi |
3042 | dec eax |
3045 | dec eax |
3043 | dec eax |
3046 | dec eax |
3044 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3047 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3045 | add eax, [ebp+FAT.DATA_START] |
3048 | add eax, [ebp+FAT.DATA_START] |
3046 | add eax, [esp+4] |
3049 | add eax, [esp+4] |
3047 | ; load sector if needed |
3050 | ; load sector if needed |
3048 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
3051 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
3049 | jz .noread |
3052 | jz .noread |
3050 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
3053 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
3051 | jz .noread |
3054 | jz .noread |
3052 | cmp ecx, esi ; (same for the last sector) |
3055 | cmp ecx, esi ; (same for the last sector) |
3053 | jz .noread |
3056 | jz .noread |
3054 | push eax ebx |
3057 | push eax ebx |
3055 | lea ebx, [ebp+FAT.buffer] |
3058 | lea ebx, [ebp+FAT.buffer] |
3056 | call fs_read32_app |
3059 | call fs_read32_app |
3057 | test eax, eax |
3060 | test eax, eax |
3058 | pop ebx eax |
3061 | pop ebx eax |
3059 | jz @f |
3062 | jz @f |
3060 | .device_err2: |
3063 | .device_err2: |
3061 | pop ecx |
3064 | pop ecx |
3062 | jmp .device_err |
3065 | jmp .device_err |
3063 | @@: |
3066 | @@: |
3064 | .noread: |
3067 | .noread: |
3065 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
3068 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
3066 | push eax ecx edi |
3069 | push eax ecx edi |
3067 | xor eax, eax |
3070 | xor eax, eax |
3068 | mov ecx, 0x200 |
3071 | mov ecx, 0x200 |
3069 | sub ecx, [esp+8+12] |
3072 | sub ecx, [esp+8+12] |
3070 | jbe @f |
3073 | jbe @f |
3071 | lea edi, [ebp+FAT.buffer] |
3074 | lea edi, [ebp+FAT.buffer] |
3072 | add edi, [esp+8+12] |
3075 | add edi, [esp+8+12] |
3073 | rep stosb |
3076 | rep stosb |
3074 | @@: |
3077 | @@: |
3075 | ; zero uninitialized data in the last sector |
3078 | ; zero uninitialized data in the last sector |
3076 | mov ecx, 0x200 |
3079 | mov ecx, 0x200 |
3077 | sub ecx, esi |
3080 | sub ecx, esi |
3078 | jbe @f |
3081 | jbe @f |
3079 | lea edi, [ebp+FAT.buffer+esi] |
3082 | lea edi, [ebp+FAT.buffer+esi] |
3080 | rep stosb |
3083 | rep stosb |
3081 | @@: |
3084 | @@: |
3082 | pop edi ecx |
3085 | pop edi ecx |
3083 | ; copy new data |
3086 | ; copy new data |
3084 | mov eax, edx |
3087 | mov eax, edx |
3085 | neg ebx |
3088 | neg ebx |
3086 | jecxz @f |
3089 | jecxz @f |
3087 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
3090 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
3088 | call memmove |
3091 | call memmove |
3089 | xor ebx, ebx |
3092 | xor ebx, ebx |
3090 | @@: |
3093 | @@: |
3091 | pop eax |
3094 | pop eax |
3092 | ; save sector |
3095 | ; save sector |
3093 | push ebx |
3096 | push ebx |
3094 | lea ebx, [ebp+FAT.buffer] |
3097 | lea ebx, [ebp+FAT.buffer] |
3095 | call fs_write32_app |
3098 | call fs_write32_app |
3096 | pop ebx |
3099 | pop ebx |
3097 | test eax, eax |
3100 | test eax, eax |
3098 | jnz .device_err2 |
3101 | jnz .device_err2 |
3099 | add edx, ecx |
3102 | add edx, ecx |
3100 | sub [esp], ecx |
3103 | sub [esp], ecx |
3101 | pop ecx |
3104 | pop ecx |
3102 | jz .ret |
3105 | jz .ret |
3103 | .skip: |
3106 | .skip: |
3104 | ; next sector |
3107 | ; next sector |
3105 | pop eax |
3108 | pop eax |
3106 | inc eax |
3109 | inc eax |
3107 | push eax |
3110 | push eax |
3108 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3111 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3109 | jb @f |
3112 | jb @f |
3110 | and dword [esp], 0 |
3113 | and dword [esp], 0 |
3111 | mov eax, edi |
3114 | mov eax, edi |
3112 | call get_FAT |
3115 | call get_FAT |
3113 | mov edi, eax |
3116 | mov edi, eax |
3114 | jc .device_err |
3117 | jc .device_err |
3115 | cmp edi, 2 |
3118 | cmp edi, 2 |
3116 | jb .fat_err |
3119 | jb .fat_err |
3117 | cmp edi, [ebp+FAT.fatRESERVED] |
3120 | cmp edi, [ebp+FAT.fatRESERVED] |
3118 | jae .fat_err |
3121 | jae .fat_err |
3119 | @@: |
3122 | @@: |
3120 | sub esi, 0x200 |
3123 | sub esi, 0x200 |
3121 | jae @f |
3124 | jae @f |
3122 | xor esi, esi |
3125 | xor esi, esi |
3123 | @@: |
3126 | @@: |
3124 | sub dword [esp+4], 0x200 |
3127 | sub dword [esp+4], 0x200 |
3125 | jae @f |
3128 | jae @f |
3126 | and dword [esp+4], 0 |
3129 | and dword [esp+4], 0 |
3127 | @@: |
3130 | @@: |
3128 | jmp .write_loop |
3131 | jmp .write_loop |
3129 | 3132 | ||
3130 | hd_extend_file.zero_size: |
3133 | hd_extend_file.zero_size: |
3131 | xor eax, eax |
3134 | xor eax, eax |
3132 | jmp hd_extend_file.start_extend |
3135 | jmp hd_extend_file.start_extend |
3133 | 3136 | ||
3134 | ; extends file on hd to given size (new data area is undefined) |
3137 | ; extends file on hd to given size (new data area is undefined) |
3135 | ; in: edi->direntry, ecx=new size |
3138 | ; in: edi->direntry, ecx=new size |
3136 | ; out: CF=0 => OK, eax=0 |
3139 | ; out: CF=0 => OK, eax=0 |
3137 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or ERROR_DEVICE) |
3140 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or ERROR_DEVICE) |
3138 | hd_extend_file: |
3141 | hd_extend_file: |
3139 | push esi |
3142 | push esi |
3140 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
3143 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
3141 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
3144 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
3142 | push ecx |
3145 | push ecx |
3143 | ; find the last cluster of file |
3146 | ; find the last cluster of file |
3144 | mov eax, [edi+20-2] |
3147 | mov eax, [edi+20-2] |
3145 | mov ax, [edi+26] |
3148 | mov ax, [edi+26] |
3146 | mov ecx, [edi+28] |
3149 | mov ecx, [edi+28] |
3147 | jecxz .zero_size |
3150 | jecxz .zero_size |
3148 | .last_loop: |
3151 | .last_loop: |
3149 | sub ecx, esi |
3152 | sub ecx, esi |
3150 | jbe .last_found |
3153 | jbe .last_found |
3151 | call get_FAT |
3154 | call get_FAT |
3152 | jnc @f |
3155 | jnc @f |
3153 | .device_err: |
3156 | .device_err: |
3154 | pop ecx |
3157 | pop ecx |
3155 | .device_err2: |
3158 | .device_err2: |
3156 | pop esi |
3159 | pop esi |
3157 | push ERROR_DEVICE |
3160 | push ERROR_DEVICE |
3158 | .ret_err: |
3161 | .ret_err: |
3159 | pop eax |
3162 | pop eax |
3160 | stc |
3163 | stc |
3161 | ret |
3164 | ret |
3162 | @@: |
3165 | @@: |
3163 | cmp eax, 2 |
3166 | cmp eax, 2 |
3164 | jb .fat_err |
3167 | jb .fat_err |
3165 | cmp eax, [ebp+FAT.fatRESERVED] |
3168 | cmp eax, [ebp+FAT.fatRESERVED] |
3166 | jb .last_loop |
3169 | jb .last_loop |
3167 | .fat_err: |
3170 | .fat_err: |
3168 | pop ecx esi |
3171 | pop ecx esi |
3169 | push ERROR_FAT_TABLE |
3172 | push ERROR_FAT_TABLE |
3170 | jmp .ret_err |
3173 | jmp .ret_err |
3171 | .last_found: |
3174 | .last_found: |
3172 | push eax |
3175 | push eax |
3173 | call get_FAT |
3176 | call get_FAT |
3174 | jnc @f |
3177 | jnc @f |
3175 | pop eax |
3178 | pop eax |
3176 | jmp .device_err |
3179 | jmp .device_err |
3177 | @@: |
3180 | @@: |
3178 | cmp eax, [ebp+FAT.fatRESERVED] |
3181 | cmp eax, [ebp+FAT.fatRESERVED] |
3179 | pop eax |
3182 | pop eax |
3180 | jb .fat_err |
3183 | jb .fat_err |
3181 | ; set length to full number of clusters |
3184 | ; set length to full number of clusters |
3182 | sub [edi+28], ecx |
3185 | sub [edi+28], ecx |
3183 | .start_extend: |
3186 | .start_extend: |
3184 | pop ecx |
3187 | pop ecx |
3185 | ; now do extend |
3188 | ; now do extend |
3186 | push edx |
3189 | push edx |
3187 | mov edx, 2 ; start scan from cluster 2 |
3190 | mov edx, 2 ; start scan from cluster 2 |
3188 | .extend_loop: |
3191 | .extend_loop: |
3189 | cmp [edi+28], ecx |
3192 | cmp [edi+28], ecx |
3190 | jae .extend_done |
3193 | jae .extend_done |
3191 | ; add new cluster |
3194 | ; add new cluster |
3192 | push eax |
3195 | push eax |
3193 | call get_free_FAT |
3196 | call get_free_FAT |
3194 | jc .disk_full |
3197 | jc .disk_full |
3195 | mov edx, [ebp+FAT.fatEND] |
3198 | mov edx, [ebp+FAT.fatEND] |
3196 | call set_FAT |
3199 | call set_FAT |
3197 | mov edx, eax |
3200 | mov edx, eax |
3198 | pop eax |
3201 | pop eax |
3199 | test eax, eax |
3202 | test eax, eax |
3200 | jz .first_cluster |
3203 | jz .first_cluster |
3201 | push edx |
3204 | push edx |
3202 | call set_FAT |
3205 | call set_FAT |
3203 | pop edx |
3206 | pop edx |
3204 | jmp @f |
3207 | jmp @f |
3205 | .first_cluster: |
3208 | .first_cluster: |
3206 | ror edx, 16 |
3209 | ror edx, 16 |
3207 | mov [edi+20], dx |
3210 | mov [edi+20], dx |
3208 | ror edx, 16 |
3211 | ror edx, 16 |
3209 | mov [edi+26], dx |
3212 | mov [edi+26], dx |
3210 | @@: |
3213 | @@: |
3211 | push ecx |
3214 | push ecx |
3212 | mov ecx, -1 |
3215 | mov ecx, -1 |
3213 | call add_disk_free_space |
3216 | call add_disk_free_space |
3214 | pop ecx |
3217 | pop ecx |
3215 | mov eax, edx |
3218 | mov eax, edx |
3216 | add [edi+28], esi |
3219 | add [edi+28], esi |
3217 | jmp .extend_loop |
3220 | jmp .extend_loop |
3218 | .extend_done: |
3221 | .extend_done: |
3219 | mov [edi+28], ecx |
3222 | mov [edi+28], ecx |
3220 | pop edx esi |
3223 | pop edx esi |
3221 | xor eax, eax ; CF=0 |
3224 | xor eax, eax ; CF=0 |
3222 | ret |
3225 | ret |
3223 | .device_err3: |
3226 | .device_err3: |
3224 | pop edx |
3227 | pop edx |
3225 | jmp .device_err2 |
3228 | jmp .device_err2 |
3226 | .disk_full: |
3229 | .disk_full: |
3227 | pop eax edx esi |
3230 | pop eax edx esi |
3228 | movi eax, ERROR_DISK_FULL |
3231 | movi eax, ERROR_DISK_FULL |
3229 | stc |
3232 | stc |
3230 | ret |
3233 | ret |
3231 | 3234 | ||
3232 | fat_update_datetime: |
3235 | fat_update_datetime: |
3233 | call get_time_for_file |
3236 | call get_time_for_file |
3234 | mov [edi+22], ax ; last write time |
3237 | mov [edi+22], ax ; last write time |
3235 | call get_date_for_file |
3238 | call get_date_for_file |
3236 | mov [edi+24], ax ; last write date |
3239 | mov [edi+24], ax ; last write date |
3237 | mov [edi+18], ax ; last access date |
3240 | mov [edi+18], ax ; last access date |
3238 | ret |
3241 | ret |
3239 | 3242 | ||
3240 | 3243 | ||
3241 | ;---------------------------------------------------------------- |
3244 | ;---------------------------------------------------------------- |
3242 | ; fat_SetFileEnd - FAT implementation of setting end-of-file |
3245 | ; fat_SetFileEnd - FAT implementation of setting end-of-file |
3243 | ; in: ebp = pointer to FAT structure |
3246 | ; in: ebp = pointer to FAT structure |
3244 | ; in: esi+[esp+4] = name |
3247 | ; in: esi+[esp+4] = name |
3245 | ; in: ebx = pointer to parameters from sysfunc 70 |
3248 | ; in: ebx = pointer to parameters from sysfunc 70 |
3246 | ; out: eax, ebx = return values for sysfunc 70 |
3249 | ; out: eax, ebx = return values for sysfunc 70 |
3247 | ;---------------------------------------------------------------- |
3250 | ;---------------------------------------------------------------- |
3248 | fat_SetFileEnd: |
3251 | fat_SetFileEnd: |
3249 | call fat_lock |
3252 | call fat_lock |
3250 | push edi |
3253 | push edi |
3251 | cmp byte [esi], 0 |
3254 | cmp byte [esi], 0 |
3252 | jnz @f |
3255 | jnz @f |
3253 | .access_denied: |
3256 | .access_denied: |
3254 | push ERROR_ACCESS_DENIED |
3257 | push ERROR_ACCESS_DENIED |
3255 | .ret: |
3258 | .ret: |
3256 | call fat_unlock |
3259 | call fat_unlock |
3257 | pop eax |
3260 | pop eax |
3258 | pop edi |
3261 | pop edi |
3259 | ret |
3262 | ret |
3260 | @@: |
3263 | @@: |
3261 | stdcall hd_find_lfn, [esp+4+4] |
3264 | stdcall hd_find_lfn, [esp+4+4] |
3262 | jnc @f |
3265 | jnc @f |
3263 | .reteax: |
3266 | .reteax: |
3264 | push eax |
3267 | push eax |
3265 | jmp .ret |
3268 | jmp .ret |
3266 | @@: |
3269 | @@: |
3267 | ; must not be directory |
3270 | ; must not be directory |
3268 | test byte [edi+11], 10h |
3271 | test byte [edi+11], 10h |
3269 | jnz .access_denied |
3272 | jnz .access_denied |
3270 | ; file size must not exceed 4 Gb |
3273 | ; file size must not exceed 4 Gb |
3271 | cmp dword [ebx+8], 0 |
3274 | cmp dword [ebx+8], 0 |
3272 | jz @f |
3275 | jz @f |
3273 | push ERROR_END_OF_FILE |
3276 | push ERROR_END_OF_FILE |
3274 | jmp .ret |
3277 | jmp .ret |
3275 | @@: |
3278 | @@: |
3276 | push eax ; save directory sector |
3279 | push eax ; save directory sector |
3277 | ; set file modification date/time to current |
3280 | ; set file modification date/time to current |
3278 | call fat_update_datetime |
3281 | call fat_update_datetime |
3279 | mov eax, [ebx+4] |
3282 | mov eax, [ebx+4] |
3280 | cmp eax, [edi+28] |
3283 | cmp eax, [edi+28] |
3281 | jb .truncate |
3284 | jb .truncate |
3282 | ja .expand |
3285 | ja .expand |
3283 | pop eax |
3286 | pop eax |
3284 | lea ebx, [ebp+FAT.buffer] |
3287 | lea ebx, [ebp+FAT.buffer] |
3285 | call fs_write32_sys |
3288 | call fs_write32_sys |
3286 | test eax, eax |
3289 | test eax, eax |
3287 | jz @f |
3290 | jz @f |
3288 | push ERROR_DEVICE |
3291 | push ERROR_DEVICE |
3289 | jmp .ret |
3292 | jmp .ret |
3290 | @@: |
3293 | @@: |
3291 | push 0 |
3294 | push 0 |
3292 | jmp .ret |
3295 | jmp .ret |
3293 | .expand: |
3296 | .expand: |
3294 | push ebx ebp ecx |
3297 | push ebx ebp ecx |
3295 | push dword [edi+28] ; save old size |
3298 | push dword [edi+28] ; save old size |
3296 | mov ecx, eax |
3299 | mov ecx, eax |
3297 | call hd_extend_file |
3300 | call hd_extend_file |
3298 | push eax ; return code |
3301 | push eax ; return code |
3299 | jnc .expand_ok |
3302 | jnc .expand_ok |
3300 | cmp al, ERROR_DISK_FULL |
3303 | cmp al, ERROR_DISK_FULL |
3301 | jz .disk_full |
3304 | jz .disk_full |
3302 | .pop_ret: |
3305 | .pop_ret: |
3303 | call update_disk |
3306 | call update_disk |
3304 | pop eax ecx ecx ebp ebx ecx |
3307 | pop eax ecx ecx ebp ebx ecx |
3305 | jmp .reteax |
3308 | jmp .reteax |
3306 | .expand_ok: |
3309 | .expand_ok: |
3307 | .disk_full: |
3310 | .disk_full: |
3308 | ; save directory |
3311 | ; save directory |
3309 | mov eax, [edi+28] |
3312 | mov eax, [edi+28] |
3310 | xchg eax, [esp+20] |
3313 | xchg eax, [esp+20] |
3311 | lea ebx, [ebp+FAT.buffer] |
3314 | lea ebx, [ebp+FAT.buffer] |
3312 | call fs_write32_sys |
3315 | call fs_write32_sys |
3313 | test eax, eax |
3316 | test eax, eax |
3314 | mov eax, [edi+20-2] |
3317 | mov eax, [edi+20-2] |
3315 | mov ax, [edi+26] |
3318 | mov ax, [edi+26] |
3316 | mov edi, eax |
3319 | mov edi, eax |
3317 | jz @f |
3320 | jz @f |
3318 | .pop_ret11: |
3321 | .pop_ret11: |
3319 | mov byte [esp], ERROR_DEVICE |
3322 | mov byte [esp], ERROR_DEVICE |
3320 | jmp .pop_ret |
3323 | jmp .pop_ret |
3321 | @@: |
3324 | @@: |
3322 | test edi, edi |
3325 | test edi, edi |
3323 | jz .pop_ret |
3326 | jz .pop_ret |
3324 | ; now zero new data |
3327 | ; now zero new data |
3325 | push 0 |
3328 | push 0 |
3326 | ; edi=current cluster, [esp]=sector in cluster |
3329 | ; edi=current cluster, [esp]=sector in cluster |
3327 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
3330 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
3328 | .zero_loop: |
3331 | .zero_loop: |
3329 | cmp edi, 2 |
3332 | cmp edi, 2 |
3330 | jb .error_fat |
3333 | jb .error_fat |
3331 | cmp edi, [ebp+FAT.fatRESERVED] |
3334 | cmp edi, [ebp+FAT.fatRESERVED] |
3332 | jae .error_fat |
3335 | jae .error_fat |
3333 | sub dword [esp+8], 0x200 |
3336 | sub dword [esp+8], 0x200 |
3334 | jae .next_cluster |
3337 | jae .next_cluster |
3335 | lea eax, [edi-2] |
3338 | lea eax, [edi-2] |
3336 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3339 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3337 | add eax, [ebp+FAT.DATA_START] |
3340 | add eax, [ebp+FAT.DATA_START] |
3338 | add eax, [esp] |
3341 | add eax, [esp] |
3339 | cmp dword [esp+8], -0x200 |
3342 | cmp dword [esp+8], -0x200 |
3340 | jz .noread |
3343 | jz .noread |
3341 | push eax |
3344 | push eax |
3342 | lea ebx, [ebp+FAT.buffer] |
3345 | lea ebx, [ebp+FAT.buffer] |
3343 | call fs_read32_app |
3346 | call fs_read32_app |
3344 | test eax, eax |
3347 | test eax, eax |
3345 | pop eax |
3348 | pop eax |
3346 | jnz .err_next |
3349 | jnz .err_next |
3347 | .noread: |
3350 | .noread: |
3348 | mov ecx, [esp+8] |
3351 | mov ecx, [esp+8] |
3349 | neg ecx |
3352 | neg ecx |
3350 | push edi |
3353 | push edi |
3351 | lea edi, [ebp+FAT.buffer+0x200] |
3354 | lea edi, [ebp+FAT.buffer+0x200] |
3352 | add edi, [esp+12] |
3355 | add edi, [esp+12] |
3353 | push eax |
3356 | push eax |
3354 | xor eax, eax |
3357 | xor eax, eax |
3355 | mov [esp+16], eax |
3358 | mov [esp+16], eax |
3356 | rep stosb |
3359 | rep stosb |
3357 | pop eax |
3360 | pop eax |
3358 | pop edi |
3361 | pop edi |
3359 | call fs_write32_app |
3362 | call fs_write32_app |
3360 | test eax, eax |
3363 | test eax, eax |
3361 | jz .next_cluster |
3364 | jz .next_cluster |
3362 | .err_next: |
3365 | .err_next: |
3363 | mov byte [esp+4], ERROR_DEVICE |
3366 | mov byte [esp+4], ERROR_DEVICE |
3364 | .next_cluster: |
3367 | .next_cluster: |
3365 | pop eax |
3368 | pop eax |
3366 | sub dword [esp+20], 0x200 |
3369 | sub dword [esp+20], 0x200 |
3367 | jbe .pop_ret |
3370 | jbe .pop_ret |
3368 | inc eax |
3371 | inc eax |
3369 | push eax |
3372 | push eax |
3370 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3373 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3371 | jb .zero_loop |
3374 | jb .zero_loop |
3372 | and dword [esp], 0 |
3375 | and dword [esp], 0 |
3373 | mov eax, edi |
3376 | mov eax, edi |
3374 | call get_FAT |
3377 | call get_FAT |
3375 | mov edi, eax |
3378 | mov edi, eax |
3376 | jnc .zero_loop |
3379 | jnc .zero_loop |
3377 | pop eax |
3380 | pop eax |
3378 | jmp .pop_ret11 |
3381 | jmp .pop_ret11 |
3379 | .truncate: |
3382 | .truncate: |
3380 | mov [edi+28], eax |
3383 | mov [edi+28], eax |
3381 | push ecx |
3384 | push ecx |
3382 | mov ecx, [edi+20-2] |
3385 | mov ecx, [edi+20-2] |
3383 | mov cx, [edi+26] |
3386 | mov cx, [edi+26] |
3384 | push eax |
3387 | push eax |
3385 | test eax, eax |
3388 | test eax, eax |
3386 | jz .zero_size |
3389 | jz .zero_size |
3387 | ; find new last cluster |
3390 | ; find new last cluster |
3388 | @@: |
3391 | @@: |
3389 | cmp ecx, 2 |
3392 | cmp ecx, 2 |
3390 | jb .error_fat2 |
3393 | jb .error_fat2 |
3391 | cmp ecx, [ebp+FAT.fatRESERVED] |
3394 | cmp ecx, [ebp+FAT.fatRESERVED] |
3392 | jae .error_fat2 |
3395 | jae .error_fat2 |
3393 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3396 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3394 | shl eax, 9 |
3397 | shl eax, 9 |
3395 | sub [esp], eax |
3398 | sub [esp], eax |
3396 | jbe @f |
3399 | jbe @f |
3397 | mov eax, ecx |
3400 | mov eax, ecx |
3398 | call get_FAT |
3401 | call get_FAT |
3399 | mov ecx, eax |
3402 | mov ecx, eax |
3400 | jnc @b |
3403 | jnc @b |
3401 | .device_err3: |
3404 | .device_err3: |
3402 | pop eax ecx eax edi |
3405 | pop eax ecx eax edi |
3403 | call update_disk |
3406 | call update_disk |
3404 | call fat_unlock |
3407 | call fat_unlock |
3405 | movi eax, ERROR_DEVICE |
3408 | movi eax, ERROR_DEVICE |
3406 | ret |
3409 | ret |
3407 | @@: |
3410 | @@: |
3408 | ; we will zero data at the end of last sector - remember it |
3411 | ; we will zero data at the end of last sector - remember it |
3409 | push ecx |
3412 | push ecx |
3410 | ; terminate FAT chain |
3413 | ; terminate FAT chain |
3411 | push edx |
3414 | push edx |
3412 | mov eax, ecx |
3415 | mov eax, ecx |
3413 | mov edx, [ebp+FAT.fatEND] |
3416 | mov edx, [ebp+FAT.fatEND] |
3414 | call set_FAT |
3417 | call set_FAT |
3415 | mov eax, edx |
3418 | mov eax, edx |
3416 | pop edx |
3419 | pop edx |
3417 | jnc @f |
3420 | jnc @f |
3418 | .device_err4: |
3421 | .device_err4: |
3419 | pop ecx |
3422 | pop ecx |
3420 | jmp .device_err3 |
3423 | jmp .device_err3 |
3421 | .zero_size: |
3424 | .zero_size: |
3422 | and word [edi+20], 0 |
3425 | and word [edi+20], 0 |
3423 | and word [edi+26], 0 |
3426 | and word [edi+26], 0 |
3424 | push 0 |
3427 | push 0 |
3425 | mov eax, ecx |
3428 | mov eax, ecx |
3426 | @@: |
3429 | @@: |
3427 | ; delete FAT chain |
3430 | ; delete FAT chain |
3428 | call clear_cluster_chain |
3431 | call clear_cluster_chain |
3429 | jc .device_err4 |
3432 | jc .device_err4 |
3430 | ; save directory |
3433 | ; save directory |
3431 | mov eax, [esp+12] |
3434 | mov eax, [esp+12] |
3432 | push ebx |
3435 | push ebx |
3433 | lea ebx, [ebp+FAT.buffer] |
3436 | lea ebx, [ebp+FAT.buffer] |
3434 | call fs_write32_sys |
3437 | call fs_write32_sys |
3435 | pop ebx |
3438 | pop ebx |
3436 | test eax, eax |
3439 | test eax, eax |
3437 | jnz .device_err4 |
3440 | jnz .device_err4 |
3438 | ; zero last sector, ignore errors |
3441 | ; zero last sector, ignore errors |
3439 | pop ecx |
3442 | pop ecx |
3440 | pop eax |
3443 | pop eax |
3441 | dec ecx |
3444 | dec ecx |
3442 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3445 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3443 | add ecx, [ebp+FAT.DATA_START] |
3446 | add ecx, [ebp+FAT.DATA_START] |
3444 | push eax |
3447 | push eax |
3445 | sar eax, 9 |
3448 | sar eax, 9 |
3446 | add ecx, eax |
3449 | add ecx, eax |
3447 | pop eax |
3450 | pop eax |
3448 | and eax, 0x1FF |
3451 | and eax, 0x1FF |
3449 | jz .truncate_done |
3452 | jz .truncate_done |
3450 | push ebx eax |
3453 | push ebx eax |
3451 | mov eax, ecx |
3454 | mov eax, ecx |
3452 | lea ebx, [ebp+FAT.buffer] |
3455 | lea ebx, [ebp+FAT.buffer] |
3453 | call fs_read32_app |
3456 | call fs_read32_app |
3454 | pop eax |
3457 | pop eax |
3455 | lea edi, [ebp+FAT.buffer+eax] |
3458 | lea edi, [ebp+FAT.buffer+eax] |
3456 | push ecx |
3459 | push ecx |
3457 | mov ecx, 0x200 |
3460 | mov ecx, 0x200 |
3458 | sub ecx, eax |
3461 | sub ecx, eax |
3459 | xor eax, eax |
3462 | xor eax, eax |
3460 | rep stosb |
3463 | rep stosb |
3461 | pop eax |
3464 | pop eax |
3462 | call fs_write32_app |
3465 | call fs_write32_app |
3463 | pop ebx |
3466 | pop ebx |
3464 | .truncate_done: |
3467 | .truncate_done: |
3465 | pop ecx eax edi |
3468 | pop ecx eax edi |
3466 | call update_disk |
3469 | call update_disk |
3467 | call fat_unlock |
3470 | call fat_unlock |
3468 | xor eax, eax |
3471 | xor eax, eax |
3469 | ret |
3472 | ret |
3470 | .error_fat: |
3473 | .error_fat: |
3471 | pop eax |
3474 | pop eax |
3472 | mov byte [esp], ERROR_FAT_TABLE |
3475 | mov byte [esp], ERROR_FAT_TABLE |
3473 | jmp .pop_ret |
3476 | jmp .pop_ret |
3474 | .error_fat2: |
3477 | .error_fat2: |
3475 | pop eax ecx eax edi |
3478 | pop eax ecx eax edi |
3476 | call update_disk |
3479 | call update_disk |
3477 | call fat_unlock |
3480 | call fat_unlock |
3478 | movi eax, ERROR_FAT_TABLE |
3481 | movi eax, ERROR_FAT_TABLE |
3479 | ret |
3482 | ret |
3480 | 3483 | ||
3481 | ;---------------------------------------------------------------- |
3484 | ;---------------------------------------------------------------- |
3482 | ; fat_GetFileInfo - FAT implementation of getting file info |
3485 | ; fat_GetFileInfo - FAT implementation of getting file info |
3483 | ; in: ebp = pointer to FAT structure |
3486 | ; in: ebp = pointer to FAT structure |
3484 | ; in: esi+[esp+4] = name |
3487 | ; in: esi+[esp+4] = name |
3485 | ; in: ebx = pointer to parameters from sysfunc 70 |
3488 | ; in: ebx = pointer to parameters from sysfunc 70 |
3486 | ; out: eax, ebx = return values for sysfunc 70 |
3489 | ; out: eax, ebx = return values for sysfunc 70 |
3487 | ;---------------------------------------------------------------- |
3490 | ;---------------------------------------------------------------- |
3488 | fat_GetFileInfo: |
3491 | fat_GetFileInfo: |
3489 | cmp byte [esi], 0 |
3492 | cmp byte [esi], 0 |
3490 | jnz @f |
3493 | jnz @f |
3491 | mov eax, 2 |
3494 | mov eax, 2 |
3492 | ret |
3495 | ret |
3493 | @@: |
3496 | @@: |
3494 | push edi |
3497 | push edi |
3495 | call fat_lock |
3498 | call fat_lock |
3496 | stdcall hd_find_lfn, [esp+4+4] |
3499 | stdcall hd_find_lfn, [esp+4+4] |
3497 | jc .error |
3500 | jc .error |
3498 | push ebp |
3501 | push ebp |
3499 | xor ebp, ebp |
3502 | xor ebp, ebp |
3500 | mov esi, [ebx+16] |
3503 | mov esi, [ebx+16] |
3501 | mov dword [esi+4], ebp |
3504 | mov dword [esi+4], ebp |
3502 | call fat_entry_to_bdfe2 |
3505 | call fat_entry_to_bdfe2 |
3503 | pop ebp |
3506 | pop ebp |
3504 | call fat_unlock |
3507 | call fat_unlock |
3505 | xor eax, eax |
3508 | xor eax, eax |
3506 | pop edi |
3509 | pop edi |
3507 | ret |
3510 | ret |
3508 | .error: |
3511 | .error: |
3509 | push eax |
3512 | push eax |
3510 | call fat_unlock |
3513 | call fat_unlock |
3511 | pop eax |
3514 | pop eax |
3512 | pop edi |
3515 | pop edi |
3513 | ret |
3516 | ret |
3514 | 3517 | ||
3515 | ;---------------------------------------------------------------- |
3518 | ;---------------------------------------------------------------- |
3516 | ; fat_SetFileInfo - FAT implementation of setting file info |
3519 | ; fat_SetFileInfo - FAT implementation of setting file info |
3517 | ; in: ebp = pointer to FAT structure |
3520 | ; in: ebp = pointer to FAT structure |
3518 | ; in: esi+[esp+4] = name |
3521 | ; in: esi+[esp+4] = name |
3519 | ; in: ebx = pointer to parameters from sysfunc 70 |
3522 | ; in: ebx = pointer to parameters from sysfunc 70 |
3520 | ; out: eax, ebx = return values for sysfunc 70 |
3523 | ; out: eax, ebx = return values for sysfunc 70 |
3521 | ;---------------------------------------------------------------- |
3524 | ;---------------------------------------------------------------- |
3522 | fat_SetFileInfo: |
3525 | fat_SetFileInfo: |
3523 | cmp byte [esi], 0 |
3526 | cmp byte [esi], 0 |
3524 | jnz @f |
3527 | jnz @f |
3525 | mov eax, 2 |
3528 | mov eax, 2 |
3526 | ret |
3529 | ret |
3527 | @@: |
3530 | @@: |
3528 | push edi |
3531 | push edi |
3529 | call fat_lock |
3532 | call fat_lock |
3530 | stdcall hd_find_lfn, [esp+4+4] |
3533 | stdcall hd_find_lfn, [esp+4+4] |
3531 | jc .error |
3534 | jc .error |
3532 | push eax |
3535 | push eax |
3533 | mov edx, [ebx+16] |
3536 | mov edx, [ebx+16] |
3534 | call bdfe_to_fat_entry |
3537 | call bdfe_to_fat_entry |
3535 | pop eax |
3538 | pop eax |
3536 | lea ebx, [ebp+FAT.buffer] |
3539 | lea ebx, [ebp+FAT.buffer] |
3537 | call fs_write32_sys |
3540 | call fs_write32_sys |
3538 | call update_disk |
3541 | call update_disk |
3539 | call fat_unlock |
3542 | call fat_unlock |
3540 | pop edi |
3543 | pop edi |
3541 | xor eax, eax |
3544 | xor eax, eax |
3542 | ret |
3545 | ret |
3543 | .error: |
3546 | .error: |
3544 | push eax |
3547 | push eax |
3545 | call fat_unlock |
3548 | call fat_unlock |
3546 | pop eax |
3549 | pop eax |
3547 | pop edi |
3550 | pop edi |
3548 | ret |
3551 | ret |
3549 | 3552 | ||
3550 | ;---------------------------------------------------------------- |
3553 | ;---------------------------------------------------------------- |
3551 | ; fat_Delete - FAT implementation of deleting a file/folder |
3554 | ; fat_Delete - FAT implementation of deleting a file/folder |
3552 | ; in: ebp = pointer to FAT structure |
3555 | ; in: ebp = pointer to FAT structure |
3553 | ; in: esi+[esp+4] = name |
3556 | ; in: esi+[esp+4] = name |
3554 | ; in: ebx = pointer to parameters from sysfunc 70 |
3557 | ; in: ebx = pointer to parameters from sysfunc 70 |
3555 | ; out: eax, ebx = return values for sysfunc 70 |
3558 | ; out: eax, ebx = return values for sysfunc 70 |
3556 | ;---------------------------------------------------------------- |
3559 | ;---------------------------------------------------------------- |
3557 | fat_Delete: |
3560 | fat_Delete: |
3558 | call fat_lock |
3561 | call fat_lock |
3559 | cmp byte [esi], 0 |
3562 | cmp byte [esi], 0 |
3560 | jnz @f |
3563 | jnz @f |
3561 | ; cannot delete root! |
3564 | ; cannot delete root! |
3562 | .access_denied: |
3565 | .access_denied: |
3563 | push ERROR_ACCESS_DENIED |
3566 | push ERROR_ACCESS_DENIED |
3564 | .pop_ret: |
3567 | .pop_ret: |
3565 | call fat_unlock |
3568 | call fat_unlock |
3566 | pop eax |
3569 | pop eax |
3567 | xor ebx, ebx |
3570 | xor ebx, ebx |
3568 | ret |
3571 | ret |
3569 | @@: |
3572 | @@: |
3570 | and [ebp+FAT.longname_sec1], 0 |
3573 | and [ebp+FAT.longname_sec1], 0 |
3571 | and [ebp+FAT.longname_sec2], 0 |
3574 | and [ebp+FAT.longname_sec2], 0 |
3572 | push edi |
3575 | push edi |
3573 | stdcall hd_find_lfn, [esp+4+4] |
3576 | stdcall hd_find_lfn, [esp+4+4] |
3574 | jnc .found |
3577 | jnc .found |
3575 | pop edi |
3578 | pop edi |
3576 | push ERROR_FILE_NOT_FOUND |
3579 | push ERROR_FILE_NOT_FOUND |
3577 | jmp .pop_ret |
3580 | jmp .pop_ret |
3578 | .found: |
3581 | .found: |
3579 | cmp dword [edi], '. ' |
3582 | cmp dword [edi], '. ' |
3580 | jz .access_denied2 |
3583 | jz .access_denied2 |
3581 | cmp dword [edi], '.. ' |
3584 | cmp dword [edi], '.. ' |
3582 | jz .access_denied2 |
3585 | jz .access_denied2 |
3583 | test byte [edi+11], 10h |
3586 | test byte [edi+11], 10h |
3584 | jz .dodel |
3587 | jz .dodel |
3585 | ; we can delete only empty folders! |
3588 | ; we can delete only empty folders! |
3586 | pushad |
3589 | pushad |
3587 | mov esi, [edi+20-2] |
3590 | mov esi, [edi+20-2] |
3588 | mov si, [edi+26] |
3591 | mov si, [edi+26] |
3589 | xor ecx, ecx |
3592 | xor ecx, ecx |
3590 | lea eax, [esi-2] |
3593 | lea eax, [esi-2] |
3591 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3594 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3592 | add eax, [ebp+FAT.DATA_START] |
3595 | add eax, [ebp+FAT.DATA_START] |
3593 | lea ebx, [ebp+FAT.buffer] |
3596 | lea ebx, [ebp+FAT.buffer] |
3594 | call fs_read32_sys |
3597 | call fs_read32_sys |
3595 | test eax, eax |
3598 | test eax, eax |
3596 | jnz .err1 |
3599 | jnz .err1 |
3597 | lea eax, [ebx+0x200] |
3600 | lea eax, [ebx+0x200] |
3598 | add ebx, 2*0x20 |
3601 | add ebx, 2*0x20 |
3599 | .checkempty: |
3602 | .checkempty: |
3600 | cmp byte [ebx], 0 |
3603 | cmp byte [ebx], 0 |
3601 | jz .empty |
3604 | jz .empty |
3602 | cmp byte [ebx], 0xE5 |
3605 | cmp byte [ebx], 0xE5 |
3603 | jnz .notempty |
3606 | jnz .notempty |
3604 | add ebx, 0x20 |
3607 | add ebx, 0x20 |
3605 | cmp ebx, eax |
3608 | cmp ebx, eax |
3606 | jb .checkempty |
3609 | jb .checkempty |
3607 | inc ecx |
3610 | inc ecx |
3608 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3611 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3609 | jb @f |
3612 | jb @f |
3610 | mov eax, esi |
3613 | mov eax, esi |
3611 | call get_FAT |
3614 | call get_FAT |
3612 | jc .err1 |
3615 | jc .err1 |
3613 | cmp eax, 2 |
3616 | cmp eax, 2 |
3614 | jb .error_fat |
3617 | jb .error_fat |
3615 | cmp eax, [ebp+FAT.fatRESERVED] |
3618 | cmp eax, [ebp+FAT.fatRESERVED] |
3616 | jae .empty |
3619 | jae .empty |
3617 | mov esi, eax |
3620 | mov esi, eax |
3618 | xor ecx, ecx |
3621 | xor ecx, ecx |
3619 | @@: |
3622 | @@: |
3620 | lea eax, [esi-2] |
3623 | lea eax, [esi-2] |
3621 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3624 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3622 | add eax, [ebp+FAT.DATA_START] |
3625 | add eax, [ebp+FAT.DATA_START] |
3623 | add eax, ecx |
3626 | add eax, ecx |
3624 | lea ebx, [ebp+FAT.buffer] |
3627 | lea ebx, [ebp+FAT.buffer] |
3625 | call fs_read32_sys |
3628 | call fs_read32_sys |
3626 | test eax, eax |
3629 | test eax, eax |
3627 | lea eax, [ebx+0x200] |
3630 | lea eax, [ebx+0x200] |
3628 | jz .checkempty |
3631 | jz .checkempty |
3629 | .err1: |
3632 | .err1: |
3630 | popad |
3633 | popad |
3631 | .err2: |
3634 | .err2: |
3632 | pop edi |
3635 | pop edi |
3633 | call fat_unlock |
3636 | call fat_unlock |
3634 | movi eax, ERROR_DEVICE |
3637 | movi eax, ERROR_DEVICE |
3635 | ret |
3638 | ret |
3636 | .error_fat: |
3639 | .error_fat: |
3637 | popad |
3640 | popad |
3638 | pop edi |
3641 | pop edi |
3639 | call fat_unlock |
3642 | call fat_unlock |
3640 | movi eax, ERROR_FAT_TABLE |
3643 | movi eax, ERROR_FAT_TABLE |
3641 | ret |
3644 | ret |
3642 | .notempty: |
3645 | .notempty: |
3643 | popad |
3646 | popad |
3644 | .access_denied2: |
3647 | .access_denied2: |
3645 | pop edi |
3648 | pop edi |
3646 | call fat_unlock |
3649 | call fat_unlock |
3647 | movi eax, ERROR_ACCESS_DENIED |
3650 | movi eax, ERROR_ACCESS_DENIED |
3648 | ret |
3651 | ret |
3649 | .empty: |
3652 | .empty: |
3650 | popad |
3653 | popad |
3651 | push eax ebx |
3654 | push eax ebx |
3652 | lea ebx, [ebp+FAT.buffer] |
3655 | lea ebx, [ebp+FAT.buffer] |
3653 | call fs_read32_sys |
3656 | call fs_read32_sys |
3654 | test eax, eax |
3657 | test eax, eax |
3655 | pop ebx eax |
3658 | pop ebx eax |
3656 | jnz .err2 |
3659 | jnz .err2 |
3657 | .dodel: |
3660 | .dodel: |
3658 | push eax |
3661 | push eax |
3659 | mov eax, [edi+20-2] |
3662 | mov eax, [edi+20-2] |
3660 | mov ax, [edi+26] |
3663 | mov ax, [edi+26] |
3661 | xchg eax, [esp] |
3664 | xchg eax, [esp] |
3662 | ; delete folder entry |
3665 | ; delete folder entry |
3663 | mov byte [edi], 0xE5 |
3666 | mov byte [edi], 0xE5 |
3664 | ; delete LFN (if present) |
3667 | ; delete LFN (if present) |
3665 | .lfndel: |
3668 | .lfndel: |
3666 | lea edx, [ebp+FAT.buffer] |
3669 | lea edx, [ebp+FAT.buffer] |
3667 | cmp edi, edx |
3670 | cmp edi, edx |
3668 | ja @f |
3671 | ja @f |
3669 | cmp [ebp+FAT.longname_sec2], 0 |
3672 | cmp [ebp+FAT.longname_sec2], 0 |
3670 | jz .lfndone |
3673 | jz .lfndone |
3671 | push [ebp+FAT.longname_sec2] |
3674 | push [ebp+FAT.longname_sec2] |
3672 | push [ebp+FAT.longname_sec1] |
3675 | push [ebp+FAT.longname_sec1] |
3673 | pop [ebp+FAT.longname_sec2] |
3676 | pop [ebp+FAT.longname_sec2] |
3674 | and [ebp+FAT.longname_sec1], 0 |
3677 | and [ebp+FAT.longname_sec1], 0 |
3675 | push ebx |
3678 | push ebx |
3676 | mov ebx, edx |
3679 | mov ebx, edx |
3677 | call fs_write32_sys |
3680 | call fs_write32_sys |
3678 | mov eax, [esp+4] |
3681 | mov eax, [esp+4] |
3679 | call fs_read32_sys |
3682 | call fs_read32_sys |
3680 | pop ebx |
3683 | pop ebx |
3681 | pop eax |
3684 | pop eax |
3682 | lea edi, [ebp+FAT.buffer+0x200] |
3685 | lea edi, [ebp+FAT.buffer+0x200] |
3683 | @@: |
3686 | @@: |
3684 | sub edi, 0x20 |
3687 | sub edi, 0x20 |
3685 | cmp byte [edi], 0xE5 |
3688 | cmp byte [edi], 0xE5 |
3686 | jz .lfndone |
3689 | jz .lfndone |
3687 | cmp byte [edi+11], 0xF |
3690 | cmp byte [edi+11], 0xF |
3688 | jnz .lfndone |
3691 | jnz .lfndone |
3689 | mov byte [edi], 0xE5 |
3692 | mov byte [edi], 0xE5 |
3690 | jmp .lfndel |
3693 | jmp .lfndel |
3691 | .lfndone: |
3694 | .lfndone: |
3692 | push ebx |
3695 | push ebx |
3693 | lea ebx, [ebp+FAT.buffer] |
3696 | lea ebx, [ebp+FAT.buffer] |
3694 | call fs_write32_sys |
3697 | call fs_write32_sys |
3695 | pop ebx |
3698 | pop ebx |
3696 | ; delete FAT chain |
3699 | ; delete FAT chain |
3697 | pop eax |
3700 | pop eax |
3698 | call clear_cluster_chain |
3701 | call clear_cluster_chain |
3699 | call update_disk |
3702 | call update_disk |
3700 | call fat_unlock |
3703 | call fat_unlock |
3701 | pop edi |
3704 | pop edi |
3702 | xor eax, eax |
3705 | xor eax, eax |
3703 | ret |
3706 | ret |
3704 | 3707 | ||
3705 | ; \end{diamond}=>=>=>=>=>=>>65536 |
3708 | ; \end{diamond}=>=>=>=>=>=>>65536 |
3706 | >65536 |
3709 | >65536 |
3707 | >> |
3710 | >> |