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1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
2 | ;; ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
3 | ;; Copyright (C) KolibriOS team 2004-2015. 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 ;; |
- | |
7 | ;; ;; |
- | |
8 | ;; FAT functions for KolibriOS ;; |
6 | ;; FAT functions for KolibriOS ;; |
9 | ;; ;; |
7 | ;; ;; |
10 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
8 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
11 | ;; ;; |
9 | ;; ;; |
12 | ;; See file COPYING for details ;; |
10 | ;; See file COPYING for details ;; |
- | 11 | ;; 06.2015 fs_read64 - pathoswithin ;; |
|
13 | ;; 04.02.2007 LFN create folder - diamond ;; |
12 | ;; 04.02.2007 LFN create folder - diamond ;; |
14 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
13 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
15 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
14 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
16 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
15 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
17 | ;; 23.06.2006 LFN start application - diamond ;; |
16 | ;; 23.06.2006 LFN start application - diamond ;; |
18 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
17 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
19 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
18 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
20 | ;; 04.05.2006 LFN read folder - diamond ;; |
19 | ;; 04.05.2006 LFN read folder - diamond ;; |
21 | ;; 29.04.2006 Elimination of hangup after the ;; |
20 | ;; 29.04.2006 Elimination of hangup after the ;; |
22 | ;; expiration hd_wait_timeout - Mario79 ;; |
21 | ;; expiration hd_wait_timeout - Mario79 ;; |
23 | ;; 23.04.2006 LFN read file - diamond ;; |
22 | ;; 23.04.2006 LFN read file - diamond ;; |
24 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
23 | ;; 28.01.2006 find all Fat16/32 partition in all input point ;; |
25 | ;; to MBR, see file part_set.inc - Mario79 ;; |
24 | ;; to MBR, see file part_set.inc - Mario79 ;; |
26 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
25 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
27 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
26 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
28 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
27 | ;; 29.11.2004 get_free_FAT changed, append dir bug fixed - ATV ;; |
29 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
28 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
30 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
29 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
31 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
30 | ;; 17.11.2004 set_FAT/get_FAT and disk cache rewritten - ATV ;; |
32 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
31 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
33 | ;; 08.11.2004 rename - ATV ;; |
32 | ;; 08.11.2004 rename - ATV ;; |
34 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
33 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
35 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
34 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
36 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
35 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
37 | ;; 06.9.2004 Fix free space by Mario79 added - MH ;; |
36 | ;; 06.09.2004 Fix free space - Mario79 ;; |
38 | ;; 24.5.2004 Write back buffer for File_write -VT ;; |
37 | ;; 24.05.2004 Write back buffer for File_write - VT ;; |
39 | ;; 20.5.2004 File_read function to work with syscall 58 - VT ;; |
38 | ;; 20.05.2004 File_read function to work with syscall 58 - VT ;; |
40 | ;; 30.3.2004 Error parameters at function return - VT ;; |
39 | ;; 30.03.2004 Error parameters at function return - VT ;; |
41 | ;; 01.5.2002 Bugfix in device write - VT ;; |
40 | ;; 29.06.2002 Improved fat32 verification - VT ;; |
42 | ;; 20.5.2002 Hd status check - VT ;; |
41 | ;; 20.05.2002 Hd status check - VT ;; |
43 | ;; 29.6.2002 Improved fat32 verification - VT ;; |
42 | ;; 01.05.2002 Bugfix in device write - VT ;; |
44 | ;; ;; |
43 | ;; ;; |
45 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
44 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
46 | - | ||
47 | $Revision: 4273 $ |
- | |
48 | 45 | ||
49 | 46 | ||
50 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
47 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
51 | 48 | ||
52 | PUSHAD_EAX equ [esp+28] |
49 | PUSHAD_EAX equ [esp+28] |
53 | PUSHAD_ECX equ [esp+24] |
50 | PUSHAD_ECX equ [esp+24] |
54 | PUSHAD_EDX equ [esp+20] |
51 | PUSHAD_EDX equ [esp+20] |
55 | PUSHAD_EBX equ [esp+16] |
52 | PUSHAD_EBX equ [esp+16] |
56 | PUSHAD_EBP equ [esp+8] |
53 | PUSHAD_EBP equ [esp+8] |
57 | PUSHAD_ESI equ [esp+4] |
54 | PUSHAD_ESI equ [esp+4] |
58 | PUSHAD_EDI equ [esp+0] |
55 | PUSHAD_EDI equ [esp+0] |
59 | 56 | ||
60 | ; Internal data for every FAT partition. |
57 | ; Internal data for every FAT partition. |
61 | struct FAT PARTITION |
58 | struct FAT PARTITION |
62 | fs_type db ? |
59 | fs_type db ? |
63 | fat16_root db 0 ; flag for fat16 rootdir |
60 | fat16_root db 0 ; flag for fat16 rootdir |
64 | fat_change db 0 ; 1=fat has changed |
61 | fat_change db 0 ; 1=fat has changed |
65 | db ? ; alignment |
62 | rb 1 |
66 | Lock MUTEX ? ; currently operations with one partition |
63 | Lock MUTEX ? ; currently operations with one partition |
67 | ; can not be executed in parallel since the |
- | |
68 | ; legacy code is not ready; this mutex guards |
64 | ; can not be executed in parallel since the legacy code is not ready |
69 | ; all operations |
- | |
70 | SECTORS_PER_FAT dd 0x1f3a |
65 | SECTORS_PER_FAT dd 0x1f3a |
71 | NUMBER_OF_FATS dd 0x2 |
66 | NUMBER_OF_FATS dd 0x2 |
72 | SECTORS_PER_CLUSTER dd 0x8 |
67 | SECTORS_PER_CLUSTER dd 0x8 |
73 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
68 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
74 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
69 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
75 | FAT_START dd 0 ; start of fat table |
70 | FAT_START dd 0 ; start of fat table |
76 | ROOT_START dd 0 ; start of rootdir (only fat16) |
71 | ROOT_START dd 0 ; start of rootdir (only fat16) |
77 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
72 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
78 | DATA_START dd 0 ; start of data area (=first cluster 2) |
73 | DATA_START dd 0 ; start of data area (=first cluster 2) |
79 | LAST_CLUSTER dd 0 ; last availabe cluster |
74 | LAST_CLUSTER dd 0 ; last availabe cluster |
80 | ADR_FSINFO dd 0 ; used only by fat32 |
75 | ADR_FSINFO dd 0 ; used only by fat32 |
81 | 76 | ||
82 | fatRESERVED dd 0x0FFFFFF6 |
77 | fatRESERVED dd 0x0FFFFFF6 |
83 | fatBAD dd 0x0FFFFFF7 |
78 | fatBAD dd 0x0FFFFFF7 |
84 | fatEND dd 0x0FFFFFF8 |
79 | fatEND dd 0x0FFFFFF8 |
85 | fatMASK dd 0x0FFFFFFF |
80 | fatMASK dd 0x0FFFFFFF |
86 | 81 | ||
87 | fatStartScan dd 2 |
82 | fatStartScan dd 2 |
88 | - | ||
89 | cluster_tmp dd 0 ; used by analyze_directory |
83 | cluster_tmp dd 0 ; used by analyze_directory |
90 | ; and analyze_directory_to_write |
84 | ; and analyze_directory_to_write |
91 | - | ||
92 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
85 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
93 | longname_sec2 dd 0 ; directory sectors for delete long filename |
86 | longname_sec2 dd 0 ; directory sectors for delete long filename |
94 | - | ||
95 | fat_in_cache dd -1 |
87 | fat_in_cache dd -1 |
96 | 88 | ||
97 | ; For FAT16/FAT32, this points to 512-byte buffer for the current sector of FAT. |
89 | ; For FAT16/FAT32, this points to 512-byte buffer for the current sector of FAT. |
98 | ; For FAT12, the entire FAT structure is read |
90 | ; For FAT12, the entire FAT structure is read |
99 | ; and unpacked from 12bit per cluster to word per cluster. |
91 | ; and unpacked from 12bit per cluster to word per cluster. |
100 | ; |
92 | |
101 | ; Note: work with unpacked copy of FAT12 means |
93 | ; Note: work with unpacked copy of FAT12 means |
102 | ; additional memory and additional code for packing/unpacking. |
94 | ; additional memory and additional code for packing/unpacking. |
103 | ; I'm not sure that the economy justifies the cost, but anyway, |
95 | ; 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. |
96 | ; there is how work was done before my edits, and I'm just keeping the principle. |
105 | fat_cache_ptr dd ? |
97 | fat_cache_ptr dd ? |
106 | fat12_unpacked_ptr dd ? |
98 | fat12_unpacked_ptr dd ? |
107 | buffer rb 512 |
99 | buffer rb 512 |
108 | fsinfo_buffer rb 512 |
100 | fsinfo_buffer rb 512 |
109 | ends |
101 | ends |
110 | 102 | ||
111 | uglobal |
103 | uglobal |
112 | align 4 |
104 | align 4 |
113 | partition_count dd 0 ; partitions found by set_FAT32_variables |
105 | partition_count dd 0 ; partitions found by set_FAT32_variables |
114 | - | ||
115 | hd_error dd 0 ; set by wait_for_sector_buffer |
106 | hd_error dd 0 |
116 | hd_setup dd 0 |
107 | hd_setup dd 0 |
117 | hd_wait_timeout dd 0 |
108 | hd_wait_timeout dd 0 |
118 | - | ||
119 | cache_search_start dd 0 ; used by find_empty_slot |
109 | cache_search_start dd 0 ; used by find_empty_slot |
120 | endg |
110 | endg |
121 | 111 | ||
122 | uglobal |
112 | uglobal |
123 | align 4 |
113 | align 4 |
124 | Sector512: ; label for dev_hdcd.inc |
114 | Sector512: ; label for dev_hdcd.inc |
125 | buffer: |
115 | buffer: |
126 | times 512 db 0 |
116 | rb 512 |
127 | endg |
117 | endg |
128 | 118 | ||
129 | iglobal |
119 | iglobal |
130 | align 4 |
120 | align 4 |
131 | fat_user_functions: |
121 | fat_user_functions: |
132 | dd fat_free |
122 | dd fat_free |
133 | dd (fat_user_functions_end - fat_user_functions - 4) / 4 |
123 | dd (fat_user_functions_end - fat_user_functions - 4) / 4 |
134 | dd fat_Read |
124 | dd fat_Read |
135 | dd fat_ReadFolder |
125 | dd fat_ReadFolder |
136 | dd fat_Rewrite |
126 | dd fat_Rewrite |
137 | dd fat_Write |
127 | dd fat_Write |
138 | dd fat_SetFileEnd |
128 | dd fat_SetFileEnd |
139 | dd fat_GetFileInfo |
129 | dd fat_GetFileInfo |
140 | dd fat_SetFileInfo |
130 | dd fat_SetFileInfo |
141 | dd 0 |
131 | dd 0 |
142 | dd fat_Delete |
132 | dd fat_Delete |
143 | dd fat_CreateFolder |
133 | dd fat_CreateFolder |
144 | fat_user_functions_end: |
134 | fat_user_functions_end: |
145 | endg |
135 | endg |
146 | 136 | ||
147 | ; these labels are located before the main function to make |
137 | ; these labels are located before the main function to make |
148 | ; most of jumps to these be short |
138 | ; most of jumps to these be short |
149 | fat_create_partition.free_return0: |
139 | fat_create_partition.free_return0: |
150 | mov eax, ebp |
140 | mov eax, ebp |
151 | call free |
141 | call free |
152 | pop ebp |
142 | pop ebp |
153 | fat_create_partition.return0: |
143 | fat_create_partition.return0: |
154 | xor eax, eax |
144 | xor eax, eax |
155 | ret |
145 | ret |
156 | fat_create_partition: |
146 | fat_create_partition: |
157 | ; sector size must be 512 |
147 | ; sector size must be 512 |
158 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
148 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
159 | jnz .return0 |
149 | jnz .return0 |
160 | ; bootsector must have been successfully read |
150 | ; bootsector must have been successfully read |
161 | cmp dword [esp+4], 0 |
151 | cmp dword [esp+4], 0 |
162 | jnz .return0 |
152 | jnz .return0 |
163 | ; bootsector signature must be correct |
153 | ; bootsector signature must be correct |
164 | cmp word [ebx+0x1fe], 0xaa55 |
154 | cmp word [ebx+0x1fe], 0xaa55 |
165 | jnz .return0 |
155 | jnz .return0 |
166 | ; sectors per cluster must be nonzero |
156 | ; sectors per cluster must be nonzero |
167 | cmp byte [ebx+0xd], 0 |
157 | cmp byte [ebx+0xd], 0 |
168 | jz .return0 |
158 | jz .return0 |
169 | ; bytes per sector must be 0x200 |
159 | ; bytes per sector must be 0x200 |
170 | cmp word [ebx+0xb], 0x200 |
160 | cmp word [ebx+0xb], 0x200 |
171 | jnz .return0 |
161 | jnz .return0 |
172 | ; number of fats must be nonzero |
162 | ; number of fats must be nonzero |
173 | cmp byte [ebx+0x10], 0 |
163 | cmp byte [ebx+0x10], 0 |
174 | jz .return0 |
164 | jz .return0 |
175 | ; The only reason to be invalid partition now is FAT12. Since the test for |
165 | ; The only reason to be invalid partition now is FAT12. Since the test for |
176 | ; FAT size requires knowledge of some calculated values, which are also used |
166 | ; FAT size requires knowledge of some calculated values, which are also used |
177 | ; in the normal operation, let's hope for the best and allocate data now; if |
167 | ; in the normal operation, let's hope for the best and allocate data now; if |
178 | ; it will prove wrong, just deallocate it. |
168 | ; it will prove wrong, just deallocate it. |
179 | movi eax, sizeof.FAT |
169 | movi eax, sizeof.FAT |
180 | call malloc |
170 | call malloc |
181 | test eax, eax |
171 | test eax, eax |
182 | jz .return0 |
172 | jz .return0 |
183 | mov ecx, dword [ebp+PARTITION.FirstSector] |
173 | mov ecx, dword [ebp+PARTITION.FirstSector] |
184 | mov dword [eax+FAT.FirstSector], ecx |
174 | mov dword [eax+FAT.FirstSector], ecx |
185 | mov ecx, dword [ebp+PARTITION.FirstSector+4] |
175 | mov ecx, dword [ebp+PARTITION.FirstSector+4] |
186 | mov dword [eax+FAT.FirstSector+4], ecx |
176 | mov dword [eax+FAT.FirstSector+4], ecx |
187 | mov ecx, dword [ebp+PARTITION.Length] |
177 | mov ecx, dword [ebp+PARTITION.Length] |
188 | mov dword [eax+FAT.Length], ecx |
178 | mov dword [eax+FAT.Length], ecx |
189 | mov ecx, dword [ebp+PARTITION.Length+4] |
179 | mov ecx, dword [ebp+PARTITION.Length+4] |
190 | mov dword [eax+FAT.Length+4], ecx |
180 | mov dword [eax+FAT.Length+4], ecx |
191 | mov ecx, [ebp+PARTITION.Disk] |
181 | mov ecx, [ebp+PARTITION.Disk] |
192 | mov [eax+FAT.Disk], ecx |
182 | mov [eax+FAT.Disk], ecx |
193 | mov [eax+FAT.FSUserFunctions], fat_user_functions |
183 | mov [eax+FAT.FSUserFunctions], fat_user_functions |
194 | or [eax+FAT.fat_in_cache], -1 |
184 | or [eax+FAT.fat_in_cache], -1 |
195 | mov [eax+FAT.fat_change], 0 |
185 | mov [eax+FAT.fat_change], 0 |
196 | push ebp |
186 | push ebp |
197 | mov ebp, eax |
187 | mov ebp, eax |
198 | 188 | ||
199 | lea ecx, [ebp+FAT.Lock] |
189 | lea ecx, [ebp+FAT.Lock] |
200 | call mutex_init |
190 | call mutex_init |
201 | 191 | ||
202 | movzx eax, word [ebx+0xe] ; sectors reserved |
192 | movzx eax, word [ebx+0xe] ; sectors reserved |
203 | mov [ebp+FAT.FAT_START], eax |
193 | mov [ebp+FAT.FAT_START], eax |
204 | 194 | ||
205 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
195 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
206 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
196 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
207 | 197 | ||
208 | movzx ecx, word [ebx+0xb] ; bytes per sector |
198 | movzx ecx, word [ebx+0xb] ; bytes per sector |
209 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
199 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
210 | 200 | ||
211 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
201 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
212 | shl eax, 5 ; mul 32 |
202 | shl eax, 5 ; mul 32 |
213 | dec ecx |
203 | dec ecx |
214 | add eax, ecx ; round up if not equal count |
204 | add eax, ecx ; round up if not equal count |
215 | inc ecx ; bytes per sector |
205 | inc ecx ; bytes per sector |
216 | xor edx, edx |
206 | xor edx, edx |
217 | div ecx |
207 | div ecx |
218 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
208 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
219 | 209 | ||
220 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
210 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
221 | test eax, eax |
211 | test eax, eax |
222 | jnz @f |
212 | jnz @f |
223 | mov eax, [ebx+0x24] ; sectors per fat |
213 | mov eax, [ebx+0x24] ; sectors per fat |
224 | @@: |
214 | @@: |
225 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
215 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
226 | 216 | ||
227 | movzx eax, byte [ebx+0x10] ; number of fats |
217 | movzx eax, byte [ebx+0x10] ; number of fats |
228 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
218 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
229 | mul [ebp+FAT.SECTORS_PER_FAT] |
219 | mul [ebp+FAT.SECTORS_PER_FAT] |
230 | test edx, edx |
220 | test edx, edx |
231 | jnz .free_return0 |
221 | jnz .free_return0 |
232 | add eax, [ebp+FAT.FAT_START] |
222 | add eax, [ebp+FAT.FAT_START] |
233 | jc .free_return0 |
223 | jc .free_return0 |
234 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
224 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
235 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
225 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
236 | jc .free_return0 |
226 | jc .free_return0 |
237 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
227 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
238 | 228 | ||
239 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
229 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
240 | test eax, eax |
230 | test eax, eax |
241 | jnz @f |
231 | jnz @f |
242 | mov eax, [ebx+0x20] ; total sector count |
232 | mov eax, [ebx+0x20] ; total sector count |
243 | @@: |
233 | @@: |
244 | ; total sector count must not exceed partition size |
234 | ; total sector count must not exceed partition size |
245 | cmp dword [ebp+FAT.Length+4], 0 |
235 | cmp dword [ebp+FAT.Length+4], 0 |
246 | jnz @f |
236 | jnz @f |
247 | cmp eax, dword [ebp+FAT.Length] |
237 | cmp eax, dword [ebp+FAT.Length] |
248 | ja .free_return0 |
238 | ja .free_return0 |
249 | @@: |
239 | @@: |
250 | mov dword [ebp+FAT.Length], eax |
240 | mov dword [ebp+FAT.Length], eax |
251 | and dword [ebp+FAT.Length+4], 0 |
241 | and dword [ebp+FAT.Length+4], 0 |
252 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
242 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
253 | jc .free_return0 |
243 | jc .free_return0 |
254 | xor edx, edx |
244 | xor edx, edx |
255 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
245 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
256 | inc eax |
246 | inc eax |
257 | mov [ebp+FAT.LAST_CLUSTER], eax |
247 | mov [ebp+FAT.LAST_CLUSTER], eax |
258 | dec eax ; cluster count |
248 | dec eax ; cluster count |
259 | jz .free_return0 |
249 | jz .free_return0 |
260 | mov [ebp+FAT.fatStartScan], 2 |
250 | mov [ebp+FAT.fatStartScan], 2 |
261 | 251 | ||
262 | ; limits by Microsoft Hardware White Paper v1.03 |
252 | ; limits by Microsoft Hardware White Paper v1.03 |
263 | cmp eax, 4085 ; 0xff5 |
253 | cmp eax, 4085 ; 0xff5 |
264 | jb .fat12 |
254 | jb .fat12 |
265 | cmp eax, 65525 ; 0xfff5 |
255 | cmp eax, 65525 ; 0xfff5 |
266 | jb .fat16 |
256 | jb .fat16 |
267 | .fat32: |
257 | .fat32: |
268 | mov eax, [ebx+0x2c] ; rootdir cluster |
258 | mov eax, [ebx+0x2c] ; rootdir cluster |
269 | mov [ebp+FAT.ROOT_CLUSTER], eax |
259 | mov [ebp+FAT.ROOT_CLUSTER], eax |
270 | movzx eax, word [ebx+0x30] |
260 | movzx eax, word [ebx+0x30] |
271 | mov [ebp+FAT.ADR_FSINFO], eax |
261 | mov [ebp+FAT.ADR_FSINFO], eax |
272 | push ebx |
262 | push ebx |
273 | add ebx, 512 |
263 | add ebx, 512 |
274 | call fs_read32_sys |
264 | call fs_read32_sys |
275 | test eax, eax |
265 | test eax, eax |
276 | jnz @f |
266 | jnz @f |
277 | mov eax, [ebx+0x1ec] |
267 | mov eax, [ebx+0x1ec] |
278 | cmp eax, -1 |
268 | cmp eax, -1 |
279 | jz @f |
269 | jz @f |
280 | mov [ebp+FAT.fatStartScan], eax |
270 | mov [ebp+FAT.fatStartScan], eax |
281 | @@: |
271 | @@: |
282 | pop ebx |
272 | pop ebx |
283 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
273 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
284 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
274 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
285 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
275 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
286 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
276 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
287 | mov al, 32 |
277 | mov al, 32 |
288 | .fat_not_12_finalize: |
278 | .fat_not_12_finalize: |
289 | mov [ebp+FAT.fs_type], al |
279 | mov [ebp+FAT.fs_type], al |
290 | ; For FAT16 and FAT32, allocate 512 bytes for FAT cache. |
280 | ; For FAT16 and FAT32, allocate 512 bytes for FAT cache. |
291 | mov eax, 512 |
281 | mov eax, 512 |
292 | call malloc |
282 | call malloc |
293 | test eax, eax |
283 | test eax, eax |
294 | jz .free_return0 |
284 | jz .free_return0 |
295 | mov [ebp+FAT.fat_cache_ptr], eax |
285 | mov [ebp+FAT.fat_cache_ptr], eax |
296 | mov eax, ebp |
286 | mov eax, ebp |
297 | pop ebp |
287 | pop ebp |
298 | ret |
288 | ret |
299 | .fat16: |
289 | .fat16: |
300 | and [ebp+FAT.ROOT_CLUSTER], 0 |
290 | and [ebp+FAT.ROOT_CLUSTER], 0 |
301 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
291 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
302 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
292 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
303 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
293 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
304 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
294 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
305 | mov al, 16 |
295 | mov al, 16 |
306 | jmp .fat_not_12_finalize |
296 | jmp .fat_not_12_finalize |
307 | .fat12: |
297 | .fat12: |
308 | and [ebp+FAT.ROOT_CLUSTER], 0 |
298 | and [ebp+FAT.ROOT_CLUSTER], 0 |
309 | mov [ebp+FAT.fatRESERVED], 0xFF6 |
299 | mov [ebp+FAT.fatRESERVED], 0xFF6 |
310 | mov [ebp+FAT.fatBAD], 0xFF7 |
300 | mov [ebp+FAT.fatBAD], 0xFF7 |
311 | mov [ebp+FAT.fatEND], 0xFFF |
301 | mov [ebp+FAT.fatEND], 0xFFF |
312 | mov [ebp+FAT.fatMASK], 0xFFF |
302 | mov [ebp+FAT.fatMASK], 0xFFF |
313 | mov al, 12 |
303 | mov al, 12 |
314 | mov [ebp+FAT.fs_type], al |
304 | mov [ebp+FAT.fs_type], al |
315 | ; For FAT12, allocate&read data for entire table: |
305 | ; For FAT12, allocate&read data for entire table: |
316 | ; calculate A = ALIGN_UP(NUM_CLUSTERS, 8), |
306 | ; calculate A = ALIGN_UP(NUM_CLUSTERS, 8), |
317 | ; calculatefatchain/restorefatchain will process A items, |
307 | ; calculatefatchain/restorefatchain will process A items, |
318 | ; allocate ALIGN_UP(A*3/2, 512) bytes for FAT table plus A*2 bytes for unpacked data. |
308 | ; allocate ALIGN_UP(A*3/2, 512) bytes for FAT table plus A*2 bytes for unpacked data. |
319 | mov eax, [ebp+FAT.LAST_CLUSTER] |
309 | mov eax, [ebp+FAT.LAST_CLUSTER] |
320 | and eax, not 7 |
310 | and eax, not 7 |
321 | add eax, 8 |
311 | add eax, 8 |
322 | mov edx, eax |
312 | mov edx, eax |
323 | lea eax, [eax*3] |
313 | lea eax, [eax*3] |
324 | add eax, 512*2-1 |
314 | add eax, 512*2-1 |
325 | shr eax, 10 |
315 | shr eax, 10 |
326 | shl eax, 9 |
316 | shl eax, 9 |
327 | lea eax, [eax+edx*2] |
317 | lea eax, [eax+edx*2] |
328 | call malloc |
318 | call malloc |
329 | test eax, eax |
319 | test eax, eax |
330 | jz .free_return0 |
320 | jz .free_return0 |
331 | ; Read ALIGN_UP(NUM_CLUSTERS*3/2, 512) bytes. |
321 | ; Read ALIGN_UP(NUM_CLUSTERS*3/2, 512) bytes. |
332 | ; Note that this can be less than allocated, this is ok, |
322 | ; Note that this can be less than allocated, this is ok, |
333 | ; overallocation simplifies calculatefatchain/restorefatchain. |
323 | ; overallocation simplifies calculatefatchain/restorefatchain. |
334 | push ebx |
324 | push ebx |
335 | mov [ebp+FAT.fat_cache_ptr], eax |
325 | mov [ebp+FAT.fat_cache_ptr], eax |
336 | mov edx, [ebp+FAT.LAST_CLUSTER] |
326 | mov edx, [ebp+FAT.LAST_CLUSTER] |
337 | lea edx, [(edx+1)*3 + 512*2-1] |
327 | lea edx, [(edx+1)*3 + 512*2-1] |
338 | shr edx, 10 |
328 | shr edx, 10 |
339 | xchg eax, ebx |
329 | xchg eax, ebx |
340 | xor eax, eax |
330 | xor eax, eax |
341 | .read_fat: |
331 | .read_fat: |
342 | push eax |
332 | push eax |
343 | add eax, [ebp+FAT.FAT_START] |
333 | add eax, [ebp+FAT.FAT_START] |
344 | call fs_read32_sys |
334 | call fs_read32_sys |
345 | test eax, eax |
335 | test eax, eax |
346 | pop eax |
336 | pop eax |
347 | jz @f |
337 | jz @f |
348 | dbgstr 'Failed to read FAT table' |
338 | dbgstr 'Failed to read FAT table' |
349 | mov eax, [ebp+FAT.fat_cache_ptr] |
339 | mov eax, [ebp+FAT.fat_cache_ptr] |
350 | call free |
340 | call free |
351 | pop ebx |
341 | pop ebx |
352 | jmp .free_return0 |
342 | jmp .free_return0 |
353 | @@: |
343 | @@: |
354 | add ebx, 512 |
344 | add ebx, 512 |
355 | inc eax |
345 | inc eax |
356 | cmp eax, edx |
346 | cmp eax, edx |
357 | jb .read_fat |
347 | jb .read_fat |
358 | mov [ebp+FAT.fat12_unpacked_ptr], ebx |
348 | mov [ebp+FAT.fat12_unpacked_ptr], ebx |
359 | call calculatefatchain |
349 | call calculatefatchain |
360 | pop ebx |
350 | pop ebx |
361 | mov eax, ebp |
351 | mov eax, ebp |
362 | pop ebp |
352 | pop ebp |
363 | ret |
353 | ret |
364 | 354 | ||
365 | fat_free: |
355 | fat_free: |
366 | push eax |
356 | push eax |
367 | mov eax, [eax+FAT.fat_cache_ptr] |
357 | mov eax, [eax+FAT.fat_cache_ptr] |
368 | call free |
358 | call free |
369 | pop eax |
359 | pop eax |
370 | jmp free |
360 | jmp free |
371 | 361 | ||
372 | calculatefatchain: |
362 | calculatefatchain: |
373 | 363 | ||
374 | pushad |
364 | pushad |
375 | 365 | ||
376 | mov esi, [ebp+FAT.fat_cache_ptr] |
366 | mov esi, [ebp+FAT.fat_cache_ptr] |
377 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
367 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
378 | 368 | ||
379 | mov edx, [ebp+FAT.LAST_CLUSTER] |
369 | mov edx, [ebp+FAT.LAST_CLUSTER] |
380 | and edx, not 7 |
370 | and edx, not 7 |
381 | lea edx, [edi+(edx+8)*2] |
371 | lea edx, [edi+(edx+8)*2] |
382 | push edx |
372 | push edx |
383 | 373 | ||
384 | fcnew: |
374 | fcnew: |
385 | mov eax, dword [esi] |
375 | mov eax, dword [esi] |
386 | mov ebx, dword [esi+4] |
376 | mov ebx, dword [esi+4] |
387 | mov ecx, dword [esi+8] |
377 | mov ecx, dword [esi+8] |
388 | mov edx, ecx |
378 | mov edx, ecx |
389 | shr edx, 4;8 ok |
379 | shr edx, 4;8 ok |
390 | shr dx, 4;7 ok |
380 | shr dx, 4;7 ok |
391 | xor ch, ch |
381 | xor ch, ch |
392 | shld ecx, ebx, 20;6 ok |
382 | shld ecx, ebx, 20;6 ok |
393 | shr cx, 4;5 ok |
383 | shr cx, 4;5 ok |
394 | shld ebx, eax, 12 |
384 | shld ebx, eax, 12 |
395 | and ebx, 0x0fffffff;4 ok |
385 | and ebx, 0x0fffffff;4 ok |
396 | shr bx, 4;3 ok |
386 | shr bx, 4;3 ok |
397 | shl eax, 4 |
387 | shl eax, 4 |
398 | and eax, 0x0fffffff;2 ok |
388 | and eax, 0x0fffffff;2 ok |
399 | shr ax, 4;1 ok |
389 | shr ax, 4;1 ok |
400 | mov dword [edi], eax |
390 | mov dword [edi], eax |
401 | mov dword [edi+4], ebx |
391 | mov dword [edi+4], ebx |
402 | mov dword [edi+8], ecx |
392 | mov dword [edi+8], ecx |
403 | mov dword [edi+12], edx |
393 | mov dword [edi+12], edx |
404 | add edi, 16 |
394 | add edi, 16 |
405 | add esi, 12 |
395 | add esi, 12 |
406 | 396 | ||
407 | cmp edi, [esp] |
397 | cmp edi, [esp] |
408 | jnz fcnew |
398 | jnz fcnew |
409 | pop eax |
399 | pop eax |
410 | 400 | ||
411 | popad |
401 | popad |
412 | ret |
402 | ret |
413 | 403 | ||
414 | 404 | ||
415 | restorefatchain: ; restore fat chain |
405 | restorefatchain: ; restore fat chain |
416 | 406 | ||
417 | pushad |
407 | pushad |
418 | 408 | ||
419 | mov esi, [ebp+FAT.fat12_unpacked_ptr] |
409 | mov esi, [ebp+FAT.fat12_unpacked_ptr] |
420 | mov edi, [ebp+FAT.fat_cache_ptr] |
410 | mov edi, [ebp+FAT.fat_cache_ptr] |
421 | 411 | ||
422 | mov edx, [ebp+FAT.LAST_CLUSTER] |
412 | mov edx, [ebp+FAT.LAST_CLUSTER] |
423 | and edx, not 7 |
413 | and edx, not 7 |
424 | lea edx, [esi+(edx+8)*2] |
414 | lea edx, [esi+(edx+8)*2] |
425 | 415 | ||
426 | fcnew2: |
416 | fcnew2: |
427 | mov eax, dword [esi] |
417 | mov eax, dword [esi] |
428 | mov ebx, dword [esi+4] |
418 | mov ebx, dword [esi+4] |
429 | shl ax, 4 |
419 | shl ax, 4 |
430 | shl eax, 4 |
420 | shl eax, 4 |
431 | shl bx, 4 |
421 | shl bx, 4 |
432 | shr ebx, 4 |
422 | shr ebx, 4 |
433 | shrd eax, ebx, 8 |
423 | shrd eax, ebx, 8 |
434 | shr ebx, 8 |
424 | shr ebx, 8 |
435 | mov dword [edi], eax |
425 | mov dword [edi], eax |
436 | mov word [edi+4], bx |
426 | mov word [edi+4], bx |
437 | add edi, 6 |
427 | add edi, 6 |
438 | add esi, 8 |
428 | add esi, 8 |
439 | 429 | ||
440 | cmp esi, edx |
430 | cmp esi, edx |
441 | jb fcnew2 |
431 | jb fcnew2 |
442 | 432 | ||
443 | mov esi, [ebp+FAT.NUMBER_OF_FATS] |
433 | mov esi, [ebp+FAT.NUMBER_OF_FATS] |
444 | mov edx, [ebp+FAT.LAST_CLUSTER] |
434 | mov edx, [ebp+FAT.LAST_CLUSTER] |
445 | lea edx, [(edx+1)*3 + 512*2-1] |
435 | lea edx, [(edx+1)*3 + 512*2-1] |
446 | shr edx, 10 |
436 | shr edx, 10 |
447 | push [ebp+FAT.FAT_START] |
437 | push [ebp+FAT.FAT_START] |
448 | 438 | ||
449 | .write_fats: |
439 | .write_fats: |
450 | xor eax, eax |
440 | xor eax, eax |
451 | mov ebx, [ebp+FAT.fat_cache_ptr] |
441 | mov ebx, [ebp+FAT.fat_cache_ptr] |
452 | .loop1: |
442 | .loop1: |
453 | push eax |
443 | push eax |
454 | add eax, [esp+4] |
444 | add eax, [esp+4] |
455 | call fs_write32_sys |
445 | call fs_write32_sys |
456 | test eax, eax |
446 | test eax, eax |
457 | pop eax |
447 | pop eax |
458 | jnz .fail |
448 | jnz .fail |
459 | add ebx, 512 |
449 | add ebx, 512 |
460 | inc eax |
450 | inc eax |
461 | cmp eax, edx |
451 | cmp eax, edx |
462 | jb .loop1 |
452 | jb .loop1 |
463 | pop eax |
453 | pop eax |
464 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
454 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
465 | push eax |
455 | push eax |
466 | dec esi |
456 | dec esi |
467 | jnz .write_fats |
457 | jnz .write_fats |
468 | pop eax |
458 | pop eax |
469 | 459 | ||
470 | popad |
460 | popad |
471 | ret |
461 | ret |
472 | .fail: |
462 | .fail: |
473 | dbgstr 'Failed to save FAT' |
463 | dbgstr 'Failed to save FAT' |
474 | popad |
464 | popad |
475 | ret |
465 | ret |
476 | 466 | ||
477 | iglobal |
467 | iglobal |
478 | label fat_legal_chars byte |
468 | label fat_legal_chars byte |
479 | ; 0 = not allowed |
469 | ; 0 = not allowed |
480 | ; 1 = allowed only in long names |
470 | ; 1 = allowed only in long names |
481 | ; 3 = allowed |
471 | ; 3 = allowed |
482 | times 32 db 0 |
472 | times 32 db 0 |
483 | ; ! " # $ % & ' ( ) * + , - . / |
473 | ; ! " # $ % & ' ( ) * + , - . / |
484 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
474 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
485 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
475 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
486 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
476 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
487 | ; @ A B C D E F G H I J K L M N O |
477 | ; @ A B C D E F G H I J K L M N O |
488 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
478 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
489 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
479 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
490 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
480 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
491 | ; ` a b c d e f g h i j k l m n o |
481 | ; ` a b c d e f g h i j k l m n o |
492 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
482 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
493 | ; p q r s t u v w x y z { | } ~ |
483 | ; p q r s t u v w x y z { | } ~ |
494 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
484 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
495 | endg |
485 | endg |
496 | 486 | ||
497 | fat_name_is_legal: |
487 | fat_name_is_legal: |
498 | ; in: esi->(long) name |
488 | ; in: esi->(long) name |
499 | ; out: CF set <=> legal |
489 | ; out: CF set <=> legal |
500 | ; destroys eax |
490 | ; destroys eax |
501 | push esi |
491 | push esi |
502 | xor eax, eax |
492 | xor eax, eax |
503 | @@: |
493 | @@: |
504 | lodsb |
494 | lodsb |
505 | test al, al |
495 | test al, al |
506 | jz .done |
496 | jz .done |
507 | cmp al, 80h |
497 | cmp al, 80h |
508 | jae .big |
498 | jae .big |
509 | test [fat_legal_chars+eax], 1 |
499 | test [fat_legal_chars+eax], 1 |
510 | jnz @b |
500 | jnz @b |
511 | .err: |
501 | .err: |
512 | pop esi |
502 | pop esi |
513 | clc |
503 | clc |
514 | ret |
504 | ret |
515 | .big: |
505 | .big: |
516 | ; 0x80-0xAF, 0xE0-0xEF |
506 | ; 0x80-0xAF, 0xE0-0xEF |
517 | cmp al, 0xB0 |
507 | cmp al, 0xB0 |
518 | jb @b |
508 | jb @b |
519 | cmp al, 0xE0 |
509 | cmp al, 0xE0 |
520 | jb .err |
510 | jb .err |
521 | cmp al, 0xF0 |
511 | cmp al, 0xF0 |
522 | jb @b |
512 | jb @b |
523 | jmp .err |
513 | jmp .err |
524 | .done: |
514 | .done: |
525 | sub esi, [esp] |
515 | sub esi, [esp] |
526 | cmp esi, 257 |
516 | cmp esi, 257 |
527 | pop esi |
517 | pop esi |
528 | ret |
518 | ret |
529 | 519 | ||
530 | fat_next_short_name: |
520 | fat_next_short_name: |
531 | ; in: edi->8+3 name |
521 | ; in: edi->8+3 name |
532 | ; out: name corrected |
522 | ; out: name corrected |
533 | ; CF=1 <=> error |
523 | ; CF=1 <=> error |
534 | pushad |
524 | pushad |
535 | mov ecx, 8 |
525 | mov ecx, 8 |
536 | mov al, '~' |
526 | mov al, '~' |
537 | std |
527 | std |
538 | push edi |
528 | push edi |
539 | add edi, 7 |
529 | add edi, 7 |
540 | repnz scasb |
530 | repnz scasb |
541 | pop edi |
531 | pop edi |
542 | cld |
532 | cld |
543 | jz .tilde |
533 | jz .tilde |
544 | ; tilde is not found, insert "~1" at end |
534 | ; tilde is not found, insert "~1" at end |
545 | add edi, 6 |
535 | add edi, 6 |
546 | cmp word [edi], ' ' |
536 | cmp word [edi], ' ' |
547 | jnz .insert_tilde |
537 | jnz .insert_tilde |
548 | @@: |
538 | @@: |
549 | dec edi |
539 | dec edi |
550 | cmp byte [edi], ' ' |
540 | cmp byte [edi], ' ' |
551 | jz @b |
541 | jz @b |
552 | inc edi |
542 | inc edi |
553 | .insert_tilde: |
543 | .insert_tilde: |
554 | mov word [edi], '~1' |
544 | mov word [edi], '~1' |
555 | popad |
545 | popad |
556 | clc |
546 | clc |
557 | ret |
547 | ret |
558 | .tilde: |
548 | .tilde: |
559 | push edi |
549 | push edi |
560 | add edi, 7 |
550 | add edi, 7 |
561 | xor ecx, ecx |
551 | xor ecx, ecx |
562 | @@: |
552 | @@: |
563 | ; after tilde may be only digits and trailing spaces |
553 | ; after tilde may be only digits and trailing spaces |
564 | cmp byte [edi], '~' |
554 | cmp byte [edi], '~' |
565 | jz .break |
555 | jz .break |
566 | cmp byte [edi], ' ' |
556 | cmp byte [edi], ' ' |
567 | jz .space |
557 | jz .space |
568 | cmp byte [edi], '9' |
558 | cmp byte [edi], '9' |
569 | jnz .found |
559 | jnz .found |
570 | dec edi |
560 | dec edi |
571 | jmp @b |
561 | jmp @b |
572 | .space: |
562 | .space: |
573 | dec edi |
563 | dec edi |
574 | inc ecx |
564 | inc ecx |
575 | jmp @b |
565 | jmp @b |
576 | .found: |
566 | .found: |
577 | inc byte [edi] |
567 | inc byte [edi] |
578 | add dword [esp], 8 |
568 | add dword [esp], 8 |
579 | jmp .zerorest |
569 | jmp .zerorest |
580 | .break: |
570 | .break: |
581 | jecxz .noplace |
571 | jecxz .noplace |
582 | inc edi |
572 | inc edi |
583 | mov al, '1' |
573 | mov al, '1' |
584 | @@: |
574 | @@: |
585 | xchg al, [edi] |
575 | xchg al, [edi] |
586 | inc edi |
576 | inc edi |
587 | cmp al, ' ' |
577 | cmp al, ' ' |
588 | mov al, '0' |
578 | mov al, '0' |
589 | jnz @b |
579 | jnz @b |
590 | .succ: |
580 | .succ: |
591 | pop edi |
581 | pop edi |
592 | popad |
582 | popad |
593 | clc |
583 | clc |
594 | ret |
584 | ret |
595 | .noplace: |
585 | .noplace: |
596 | dec edi |
586 | dec edi |
597 | cmp edi, [esp] |
587 | cmp edi, [esp] |
598 | jz .err |
588 | jz .err |
599 | add dword [esp], 8 |
589 | add dword [esp], 8 |
600 | mov word [edi], '~1' |
590 | mov word [edi], '~1' |
601 | inc edi |
591 | inc edi |
602 | inc edi |
592 | inc edi |
603 | @@: |
593 | @@: |
604 | mov byte [edi], '0' |
594 | mov byte [edi], '0' |
605 | .zerorest: |
595 | .zerorest: |
606 | inc edi |
596 | inc edi |
607 | cmp edi, [esp] |
597 | cmp edi, [esp] |
608 | jb @b |
598 | jb @b |
609 | pop edi |
599 | pop edi |
610 | popad |
600 | popad |
611 | ;clc ; automatically |
601 | ;clc ; automatically |
612 | ret |
602 | ret |
613 | .err: |
603 | .err: |
614 | pop edi |
604 | pop edi |
615 | popad |
605 | popad |
616 | stc |
606 | stc |
617 | ret |
607 | ret |
618 | 608 | ||
619 | fat_gen_short_name: |
609 | fat_gen_short_name: |
620 | ; in: esi->long name |
610 | ; in: esi->long name |
621 | ; edi->buffer (8+3=11 chars) |
611 | ; edi->buffer (8+3=11 chars) |
622 | ; out: buffer filled |
612 | ; out: buffer filled |
623 | pushad |
613 | pushad |
624 | mov eax, ' ' |
614 | mov eax, ' ' |
625 | push edi |
615 | push edi |
626 | stosd |
616 | stosd |
627 | stosd |
617 | stosd |
628 | stosd |
618 | stosd |
629 | pop edi |
619 | pop edi |
630 | xor eax, eax |
620 | xor eax, eax |
631 | movi ebx, 8 |
621 | movi ebx, 8 |
632 | lea ecx, [edi+8] |
622 | lea ecx, [edi+8] |
633 | .loop: |
623 | .loop: |
634 | lodsb |
624 | lodsb |
635 | test al, al |
625 | test al, al |
636 | jz .done |
626 | jz .done |
637 | call char_toupper |
627 | call char_toupper |
638 | cmp al, ' ' |
628 | cmp al, ' ' |
639 | jz .space |
629 | jz .space |
640 | cmp al, 80h |
630 | cmp al, 80h |
641 | ja .big |
631 | ja .big |
642 | test [fat_legal_chars+eax], 2 |
632 | test [fat_legal_chars+eax], 2 |
643 | jnz .symbol |
633 | jnz .symbol |
644 | .inv_symbol: |
634 | .inv_symbol: |
645 | mov al, '_' |
635 | mov al, '_' |
646 | or bh, 1 |
636 | or bh, 1 |
647 | .symbol: |
637 | .symbol: |
648 | cmp al, '.' |
638 | cmp al, '.' |
649 | jz .dot |
639 | jz .dot |
650 | .normal_symbol: |
640 | .normal_symbol: |
651 | dec bl |
641 | dec bl |
652 | jns .store |
642 | jns .store |
653 | mov bl, 0 |
643 | mov bl, 0 |
654 | .space: |
644 | .space: |
655 | or bh, 1 |
645 | or bh, 1 |
656 | jmp .loop |
646 | jmp .loop |
657 | .store: |
647 | .store: |
658 | stosb |
648 | stosb |
659 | jmp .loop |
649 | jmp .loop |
660 | .big: |
650 | .big: |
661 | cmp al, 0xB0 |
651 | cmp al, 0xB0 |
662 | jb .normal_symbol |
652 | jb .normal_symbol |
663 | cmp al, 0xE0 |
653 | cmp al, 0xE0 |
664 | jb .inv_symbol |
654 | jb .inv_symbol |
665 | cmp al, 0xF0 |
655 | cmp al, 0xF0 |
666 | jb .normal_symbol |
656 | jb .normal_symbol |
667 | jmp .inv_symbol |
657 | jmp .inv_symbol |
668 | .dot: |
658 | .dot: |
669 | test bh, 2 |
659 | test bh, 2 |
670 | jz .firstdot |
660 | jz .firstdot |
671 | pop ebx |
661 | pop ebx |
672 | add ebx, edi |
662 | add ebx, edi |
673 | sub ebx, ecx |
663 | sub ebx, ecx |
674 | push ebx |
664 | push ebx |
675 | cmp ebx, ecx |
665 | cmp ebx, ecx |
676 | jb @f |
666 | jb @f |
677 | pop ebx |
667 | pop ebx |
678 | push ecx |
668 | push ecx |
679 | @@: |
669 | @@: |
680 | cmp edi, ecx |
670 | cmp edi, ecx |
681 | jbe .skip |
671 | jbe .skip |
682 | @@: |
672 | @@: |
683 | dec edi |
673 | dec edi |
684 | mov al, [edi] |
674 | mov al, [edi] |
685 | dec ebx |
675 | dec ebx |
686 | mov [ebx], al |
676 | mov [ebx], al |
687 | mov byte [edi], ' ' |
677 | mov byte [edi], ' ' |
688 | cmp edi, ecx |
678 | cmp edi, ecx |
689 | ja @b |
679 | ja @b |
690 | .skip: |
680 | .skip: |
691 | mov bh, 3 |
681 | mov bh, 3 |
692 | jmp @f |
682 | jmp @f |
693 | .firstdot: |
683 | .firstdot: |
694 | cmp bl, 8 |
684 | cmp bl, 8 |
695 | jz .space |
685 | jz .space |
696 | push edi |
686 | push edi |
697 | or bh, 2 |
687 | or bh, 2 |
698 | @@: |
688 | @@: |
699 | mov edi, ecx |
689 | mov edi, ecx |
700 | mov bl, 3 |
690 | mov bl, 3 |
701 | jmp .loop |
691 | jmp .loop |
702 | .done: |
692 | .done: |
703 | test bh, 2 |
693 | test bh, 2 |
704 | jz @f |
694 | jz @f |
705 | pop edi |
695 | pop edi |
706 | @@: |
696 | @@: |
707 | lea edi, [ecx-8] |
697 | lea edi, [ecx-8] |
708 | test bh, 1 |
698 | test bh, 1 |
709 | jz @f |
699 | jz @f |
710 | call fat_next_short_name |
700 | call fat_next_short_name |
711 | @@: |
701 | @@: |
712 | popad |
702 | popad |
713 | ret |
703 | ret |
714 | 704 | ||
715 | fat12_free_space: |
705 | fat12_free_space: |
716 | ;--------------------------------------------- |
706 | ;--------------------------------------------- |
717 | ; |
707 | ; |
718 | ; returns free space in edi |
708 | ; returns free space in edi |
719 | ; rewr.by Mihasik |
709 | ; rewr.by Mihasik |
720 | ;--------------------------------------------- |
710 | ;--------------------------------------------- |
721 | 711 | ||
722 | push eax ebx ecx |
712 | push eax ebx ecx |
723 | 713 | ||
724 | mov edi, [ebp+FAT.fat12_unpacked_ptr];start of FAT |
714 | mov edi, [ebp+FAT.fat12_unpacked_ptr];start of FAT |
725 | xor ax, ax;Free cluster=0x0000 in FAT |
715 | xor ax, ax;Free cluster=0x0000 in FAT |
726 | xor ebx, ebx;counter |
716 | xor ebx, ebx;counter |
727 | mov ecx, [ebp+FAT.LAST_CLUSTER] |
717 | mov ecx, [ebp+FAT.LAST_CLUSTER] |
728 | inc ecx |
718 | inc ecx |
729 | cld |
719 | cld |
730 | rdfs1: |
720 | rdfs1: |
731 | repne scasw |
721 | repne scasw |
732 | jnz rdfs2 ;if last cluster not 0 |
722 | jnz rdfs2 ;if last cluster not 0 |
733 | inc ebx |
723 | inc ebx |
734 | test ecx, ecx |
724 | test ecx, ecx |
735 | jnz rdfs1 |
725 | jnz rdfs1 |
736 | rdfs2: |
726 | rdfs2: |
737 | shl ebx, 9;free clusters*512 |
727 | shl ebx, 9;free clusters*512 |
738 | mov edi, ebx |
728 | mov edi, ebx |
739 | 729 | ||
740 | pop ecx ebx eax |
730 | pop ecx ebx eax |
741 | ret |
731 | ret |
742 | 732 | ||
743 | 733 | ||
744 | 734 | ||
745 | set_FAT: |
735 | set_FAT: |
746 | ;-------------------------------- |
736 | ;-------------------------------- |
747 | ; input : EAX = cluster |
737 | ; input : EAX = cluster |
748 | ; EDX = value to save |
738 | ; EDX = value to save |
749 | ; EBP = pointer to FAT structure |
739 | ; EBP = pointer to FAT structure |
750 | ; output : EDX = old value |
740 | ; output : EDX = old value |
751 | ;-------------------------------- |
741 | ;-------------------------------- |
752 | ; out: CF set <=> error |
742 | ; out: CF set <=> error |
753 | push eax ebx esi |
743 | push eax ebx esi |
754 | 744 | ||
755 | cmp eax, 2 |
745 | cmp eax, 2 |
756 | jb sfc_error |
746 | jb sfc_error |
757 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
747 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
758 | ja sfc_error |
748 | ja sfc_error |
759 | cmp [ebp+FAT.fs_type], 12 |
749 | cmp [ebp+FAT.fs_type], 12 |
760 | je set_FAT12 |
750 | je set_FAT12 |
761 | cmp [ebp+FAT.fs_type], 16 |
751 | cmp [ebp+FAT.fs_type], 16 |
762 | je sfc_1 |
752 | je sfc_1 |
763 | add eax, eax |
753 | add eax, eax |
764 | sfc_1: |
754 | sfc_1: |
765 | add eax, eax |
755 | add eax, eax |
766 | mov esi, 511 |
756 | mov esi, 511 |
767 | and esi, eax ; esi = position in fat sector |
757 | and esi, eax ; esi = position in fat sector |
768 | shr eax, 9 ; eax = fat sector |
758 | shr eax, 9 ; eax = fat sector |
769 | add eax, [ebp+FAT.FAT_START] |
759 | add eax, [ebp+FAT.FAT_START] |
770 | mov ebx, [ebp+FAT.fat_cache_ptr] |
760 | mov ebx, [ebp+FAT.fat_cache_ptr] |
771 | 761 | ||
772 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
762 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
773 | je sfc_in_cache ; yes |
763 | je sfc_in_cache ; yes |
774 | 764 | ||
775 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
765 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
776 | je sfc_no_change ; no |
766 | je sfc_no_change ; no |
777 | call write_fat_sector; yes. write it into disk |
767 | call write_fat_sector; yes. write it into disk |
778 | jc sfc_error |
768 | jc sfc_error |
779 | 769 | ||
780 | sfc_no_change: |
770 | sfc_no_change: |
781 | mov [ebp+FAT.fat_in_cache], eax; save fat sector |
771 | mov [ebp+FAT.fat_in_cache], eax; save fat sector |
782 | call fs_read32_sys |
772 | call fs_read32_sys |
783 | test eax, eax |
773 | test eax, eax |
784 | jne sfc_error |
774 | jne sfc_error |
785 | 775 | ||
786 | 776 | ||
787 | sfc_in_cache: |
777 | sfc_in_cache: |
788 | cmp [ebp+FAT.fs_type], 16 |
778 | cmp [ebp+FAT.fs_type], 16 |
789 | jne sfc_test32 |
779 | jne sfc_test32 |
790 | 780 | ||
791 | sfc_set16: |
781 | sfc_set16: |
792 | xchg [ebx+esi], dx ; save new value and get old value |
782 | xchg [ebx+esi], dx ; save new value and get old value |
793 | jmp sfc_write |
783 | jmp sfc_write |
794 | 784 | ||
795 | sfc_test32: |
785 | sfc_test32: |
796 | mov eax, [ebp+FAT.fatMASK] |
786 | mov eax, [ebp+FAT.fatMASK] |
797 | 787 | ||
798 | sfc_set32: |
788 | sfc_set32: |
799 | and edx, eax |
789 | and edx, eax |
800 | xor eax, -1 ; mask for high bits |
790 | xor eax, -1 ; mask for high bits |
801 | and eax, [ebx+esi] ; get high 4 bits |
791 | and eax, [ebx+esi] ; get high 4 bits |
802 | or eax, edx |
792 | or eax, edx |
803 | mov edx, [ebx+esi] ; get old value |
793 | mov edx, [ebx+esi] ; get old value |
804 | mov [ebx+esi], eax ; save new value |
794 | mov [ebx+esi], eax ; save new value |
805 | 795 | ||
806 | sfc_write: |
796 | sfc_write: |
807 | mov [ebp+FAT.fat_change], 1; fat has changed |
797 | mov [ebp+FAT.fat_change], 1; fat has changed |
808 | 798 | ||
809 | sfc_nonzero: |
799 | sfc_nonzero: |
810 | and edx, [ebp+FAT.fatMASK] |
800 | and edx, [ebp+FAT.fatMASK] |
811 | 801 | ||
812 | sfc_return: |
802 | sfc_return: |
813 | pop esi ebx eax |
803 | pop esi ebx eax |
814 | ret |
804 | ret |
815 | sfc_error: |
805 | sfc_error: |
816 | stc |
806 | stc |
817 | jmp sfc_return |
807 | jmp sfc_return |
818 | 808 | ||
819 | set_FAT12: |
809 | set_FAT12: |
820 | test edx, 0xF000 |
810 | test edx, 0xF000 |
821 | jnz sfc_error |
811 | jnz sfc_error |
822 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
812 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
823 | xchg [ebx+eax*2], dx |
813 | xchg [ebx+eax*2], dx |
824 | mov [ebp+FAT.fat_change], 1 |
814 | mov [ebp+FAT.fat_change], 1 |
825 | pop esi ebx eax |
815 | pop esi ebx eax |
826 | clc |
816 | clc |
827 | ret |
817 | ret |
828 | 818 | ||
829 | get_FAT: |
819 | get_FAT: |
830 | ;-------------------------------- |
820 | ;-------------------------------- |
831 | ; input : EAX = cluster |
821 | ; input : EAX = cluster |
832 | ; EBP = pointer to FAT structure |
822 | ; EBP = pointer to FAT structure |
833 | ; output : EAX = next cluster |
823 | ; output : EAX = next cluster |
834 | ;-------------------------------- |
824 | ;-------------------------------- |
835 | ; out: CF set <=> error |
825 | ; out: CF set <=> error |
836 | push ebx esi |
826 | push ebx esi |
837 | 827 | ||
838 | cmp [ebp+FAT.fs_type], 12 |
828 | cmp [ebp+FAT.fs_type], 12 |
839 | je get_FAT12 |
829 | je get_FAT12 |
840 | 830 | ||
841 | cmp [ebp+FAT.fs_type], 16 |
831 | cmp [ebp+FAT.fs_type], 16 |
842 | je gfc_1 |
832 | je gfc_1 |
843 | add eax, eax |
833 | add eax, eax |
844 | gfc_1: |
834 | gfc_1: |
845 | add eax, eax |
835 | add eax, eax |
846 | mov esi, 511 |
836 | mov esi, 511 |
847 | and esi, eax ; esi = position in fat sector |
837 | and esi, eax ; esi = position in fat sector |
848 | shr eax, 9 ; eax = fat sector |
838 | shr eax, 9 ; eax = fat sector |
849 | add eax, [ebp+FAT.FAT_START] |
839 | add eax, [ebp+FAT.FAT_START] |
850 | mov ebx, [ebp+FAT.fat_cache_ptr] |
840 | mov ebx, [ebp+FAT.fat_cache_ptr] |
851 | 841 | ||
852 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
842 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
853 | je gfc_in_cache |
843 | je gfc_in_cache |
854 | 844 | ||
855 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
845 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
856 | je gfc_no_change ; no |
846 | je gfc_no_change ; no |
857 | call write_fat_sector; yes. write it into disk |
847 | call write_fat_sector; yes. write it into disk |
858 | jc hd_error_01 |
848 | jc hd_error_01 |
859 | 849 | ||
860 | gfc_no_change: |
850 | gfc_no_change: |
861 | mov [ebp+FAT.fat_in_cache], eax |
851 | mov [ebp+FAT.fat_in_cache], eax |
862 | call fs_read32_sys |
852 | call fs_read32_sys |
863 | test eax, eax |
853 | test eax, eax |
864 | jne hd_error_01 |
854 | jne hd_error_01 |
865 | 855 | ||
866 | gfc_in_cache: |
856 | gfc_in_cache: |
867 | mov eax, [ebx+esi] |
857 | mov eax, [ebx+esi] |
868 | and eax, [ebp+FAT.fatMASK] |
858 | and eax, [ebp+FAT.fatMASK] |
869 | gfc_return: |
859 | gfc_return: |
870 | pop esi ebx |
860 | pop esi ebx |
871 | ret |
861 | ret |
872 | hd_error_01: |
862 | hd_error_01: |
873 | stc |
863 | stc |
874 | jmp gfc_return |
864 | jmp gfc_return |
875 | 865 | ||
876 | get_FAT12: |
866 | get_FAT12: |
877 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
867 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
878 | movzx eax, word [ebx+eax*2] |
868 | movzx eax, word [ebx+eax*2] |
879 | pop esi ebx |
869 | pop esi ebx |
880 | clc |
870 | clc |
881 | ret |
871 | ret |
882 | 872 | ||
883 | 873 | ||
884 | get_free_FAT: |
874 | get_free_FAT: |
885 | ;----------------------------------------------------------- |
875 | ;----------------------------------------------------------- |
886 | ; output : if CARRY=0 EAX = # first cluster found free |
876 | ; output : if CARRY=0 EAX = # first cluster found free |
887 | ; if CARRY=1 disk full |
877 | ; if CARRY=1 disk full |
888 | ; Note : for more speed need to use fat_cache directly |
878 | ; Note : for more speed need to use fat_cache directly |
889 | ;----------------------------------------------------------- |
879 | ;----------------------------------------------------------- |
890 | push ecx |
880 | push ecx |
891 | mov ecx, [ebp+FAT.LAST_CLUSTER]; counter for full disk |
881 | mov ecx, [ebp+FAT.LAST_CLUSTER]; counter for full disk |
892 | mov eax, [ebp+FAT.fatStartScan] |
882 | mov eax, [ebp+FAT.fatStartScan] |
893 | cmp [ebp+FAT.fs_type], 12 |
883 | cmp [ebp+FAT.fs_type], 12 |
894 | jz get_free_FAT12 |
884 | jz get_free_FAT12 |
895 | dec ecx |
885 | dec ecx |
896 | cmp eax, 2 |
886 | cmp eax, 2 |
897 | jb gff_reset |
887 | jb gff_reset |
898 | 888 | ||
899 | gff_test: |
889 | gff_test: |
900 | cmp eax, [ebp+FAT.LAST_CLUSTER]; if above last cluster start at cluster 2 |
890 | cmp eax, [ebp+FAT.LAST_CLUSTER]; if above last cluster start at cluster 2 |
901 | jbe gff_in_range |
891 | jbe gff_in_range |
902 | gff_reset: |
892 | gff_reset: |
903 | mov eax, 2 |
893 | mov eax, 2 |
904 | 894 | ||
905 | gff_in_range: |
895 | gff_in_range: |
906 | push eax |
896 | push eax |
907 | call get_FAT ; get cluster state |
897 | call get_FAT ; get cluster state |
908 | jc gff_not_found_1 |
898 | jc gff_not_found_1 |
909 | 899 | ||
910 | test eax, eax ; is it free? |
900 | test eax, eax ; is it free? |
911 | pop eax |
901 | pop eax |
912 | je gff_found ; yes |
902 | je gff_found ; yes |
913 | inc eax ; next cluster |
903 | inc eax ; next cluster |
914 | dec ecx ; is all checked? |
904 | dec ecx ; is all checked? |
915 | jnz gff_test ; no |
905 | jnz gff_test ; no |
916 | 906 | ||
917 | gff_not_found: |
907 | gff_not_found: |
918 | pop ecx ; yes. disk is full |
908 | pop ecx ; yes. disk is full |
919 | stc |
909 | stc |
920 | ret |
910 | ret |
921 | 911 | ||
922 | gff_not_found_1: |
912 | gff_not_found_1: |
923 | pop eax |
913 | pop eax |
924 | jmp gff_not_found |
914 | jmp gff_not_found |
925 | 915 | ||
926 | gff_found: |
916 | gff_found: |
927 | lea ecx, [eax+1] |
917 | lea ecx, [eax+1] |
928 | mov [ebp+FAT.fatStartScan], ecx |
918 | mov [ebp+FAT.fatStartScan], ecx |
929 | pop ecx |
919 | pop ecx |
930 | clc |
920 | clc |
931 | ret |
921 | ret |
932 | 922 | ||
933 | get_free_FAT12: |
923 | get_free_FAT12: |
934 | push edx edi |
924 | push edx edi |
935 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
925 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
936 | cmp eax, 2 |
926 | cmp eax, 2 |
937 | jb .reset |
927 | jb .reset |
938 | cmp eax, ecx |
928 | cmp eax, ecx |
939 | jbe @f |
929 | jbe @f |
940 | .reset: |
930 | .reset: |
941 | mov eax, 2 |
931 | mov eax, 2 |
942 | @@: |
932 | @@: |
943 | mov edx, eax |
933 | mov edx, eax |
944 | lea edi, [edi+eax*2] |
934 | lea edi, [edi+eax*2] |
945 | sub ecx, eax |
935 | sub ecx, eax |
946 | inc ecx |
936 | inc ecx |
947 | xor eax, eax |
937 | xor eax, eax |
948 | repnz scasw |
938 | repnz scasw |
949 | jz .found |
939 | jz .found |
950 | cmp edx, 2 |
940 | cmp edx, 2 |
951 | jz .notfound |
941 | jz .notfound |
952 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
942 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
953 | lea ecx, [edx-2] |
943 | lea ecx, [edx-2] |
954 | repnz scasw |
944 | repnz scasw |
955 | jnz .notfound |
945 | jnz .notfound |
956 | .found: |
946 | .found: |
957 | sub edi, [ebp+FAT.fat12_unpacked_ptr] |
947 | sub edi, [ebp+FAT.fat12_unpacked_ptr] |
958 | shr edi, 1 |
948 | shr edi, 1 |
959 | mov [ebp+FAT.fatStartScan], edi |
949 | mov [ebp+FAT.fatStartScan], edi |
960 | lea eax, [edi-1] |
950 | lea eax, [edi-1] |
961 | pop edi edx ecx |
951 | pop edi edx ecx |
962 | ret |
952 | ret |
963 | .notfound: |
953 | .notfound: |
964 | pop edi edx ecx |
954 | pop edi edx ecx |
965 | stc |
955 | stc |
966 | ret |
956 | ret |
967 | 957 | ||
968 | 958 | ||
969 | write_fat_sector: |
959 | write_fat_sector: |
970 | ;----------------------------------------------------------- |
960 | ;----------------------------------------------------------- |
971 | ; write changed fat to disk |
961 | ; write changed fat to disk |
972 | ;----------------------------------------------------------- |
962 | ;----------------------------------------------------------- |
973 | push eax ebx ecx |
963 | push eax ebx ecx |
974 | 964 | ||
975 | mov [ebp+FAT.fat_change], 0 |
965 | mov [ebp+FAT.fat_change], 0 |
976 | mov eax, [ebp+FAT.fat_in_cache] |
966 | mov eax, [ebp+FAT.fat_in_cache] |
977 | cmp eax, -1 |
967 | cmp eax, -1 |
978 | jz write_fat_not_used |
968 | jz write_fat_not_used |
979 | mov ebx, [ebp+FAT.fat_cache_ptr] |
969 | mov ebx, [ebp+FAT.fat_cache_ptr] |
980 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
970 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
981 | 971 | ||
982 | write_next_fat: |
972 | write_next_fat: |
983 | push eax |
973 | push eax |
984 | call fs_write32_sys |
974 | call fs_write32_sys |
985 | test eax, eax |
975 | test eax, eax |
986 | pop eax |
976 | pop eax |
987 | jnz write_fat_not_used |
977 | jnz write_fat_not_used |
988 | 978 | ||
989 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
979 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
990 | dec ecx |
980 | dec ecx |
991 | jnz write_next_fat |
981 | jnz write_next_fat |
992 | 982 | ||
993 | write_fat_not_used: |
983 | write_fat_not_used: |
994 | pop ecx ebx eax |
984 | pop ecx ebx eax |
995 | ret |
985 | ret |
996 | 986 | ||
997 | 987 | ||
998 | 988 | ||
999 | 989 | ||
1000 | 990 | ||
1001 | bcd2bin: |
991 | bcd2bin: |
1002 | ;---------------------------------- |
992 | ;---------------------------------- |
1003 | ; input : AL=BCD number (eg. 0x11) |
993 | ; input : AL=BCD number (eg. 0x11) |
1004 | ; output : AH=0 |
994 | ; output : AH=0 |
1005 | ; AL=decimal number (eg. 11) |
995 | ; AL=decimal number (eg. 11) |
1006 | ;---------------------------------- |
996 | ;---------------------------------- |
1007 | xor ah, ah |
997 | xor ah, ah |
1008 | shl ax, 4 |
998 | shl ax, 4 |
1009 | shr al, 4 |
999 | shr al, 4 |
1010 | aad |
1000 | aad |
1011 | ret |
1001 | ret |
1012 | 1002 | ||
1013 | 1003 | ||
1014 | get_date_for_file: |
1004 | get_date_for_file: |
1015 | ;----------------------------------------------------- |
1005 | ;----------------------------------------------------- |
1016 | ; Get date from CMOS and pack day,month,year in AX |
1006 | ; Get date from CMOS and pack day,month,year in AX |
1017 | ; DATE bits 0..4 : day of month 0..31 |
1007 | ; DATE bits 0..4 : day of month 0..31 |
1018 | ; 5..8 : month of year 1..12 |
1008 | ; 5..8 : month of year 1..12 |
1019 | ; 9..15 : count of years from 1980 |
1009 | ; 9..15 : count of years from 1980 |
1020 | ;----------------------------------------------------- |
1010 | ;----------------------------------------------------- |
1021 | mov al, 0x7 ;day |
1011 | mov al, 0x7 ;day |
1022 | out 0x70, al |
1012 | out 0x70, al |
1023 | in al, 0x71 |
1013 | in al, 0x71 |
1024 | call bcd2bin |
1014 | call bcd2bin |
1025 | ror eax, 5 |
1015 | ror eax, 5 |
1026 | 1016 | ||
1027 | mov al, 0x8 ;month |
1017 | mov al, 0x8 ;month |
1028 | out 0x70, al |
1018 | out 0x70, al |
1029 | in al, 0x71 |
1019 | in al, 0x71 |
1030 | call bcd2bin |
1020 | call bcd2bin |
1031 | ror eax, 4 |
1021 | ror eax, 4 |
1032 | 1022 | ||
1033 | mov al, 0x9 ;year |
1023 | mov al, 0x9 ;year |
1034 | out 0x70, al |
1024 | out 0x70, al |
1035 | in al, 0x71 |
1025 | in al, 0x71 |
1036 | call bcd2bin |
1026 | call bcd2bin |
1037 | add ax, 20 ;because CMOS return only the two last |
1027 | add ax, 20 ;because CMOS return only the two last |
1038 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
1028 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
1039 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
1029 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
1040 | ret |
1030 | ret |
1041 | 1031 | ||
1042 | 1032 | ||
1043 | get_time_for_file: |
1033 | get_time_for_file: |
1044 | ;----------------------------------------------------- |
1034 | ;----------------------------------------------------- |
1045 | ; Get time from CMOS and pack hour,minute,second in AX |
1035 | ; Get time from CMOS and pack hour,minute,second in AX |
1046 | ; TIME bits 0..4 : second (the low bit is lost) |
1036 | ; TIME bits 0..4 : second (the low bit is lost) |
1047 | ; 5..10 : minute 0..59 |
1037 | ; 5..10 : minute 0..59 |
1048 | ; 11..15 : hour 0..23 |
1038 | ; 11..15 : hour 0..23 |
1049 | ;----------------------------------------------------- |
1039 | ;----------------------------------------------------- |
1050 | mov al, 0x0 ;second |
1040 | mov al, 0x0 ;second |
1051 | out 0x70, al |
1041 | out 0x70, al |
1052 | in al, 0x71 |
1042 | in al, 0x71 |
1053 | call bcd2bin |
1043 | call bcd2bin |
1054 | ror eax, 6 |
1044 | ror eax, 6 |
1055 | 1045 | ||
1056 | mov al, 0x2 ;minute |
1046 | mov al, 0x2 ;minute |
1057 | out 0x70, al |
1047 | out 0x70, al |
1058 | in al, 0x71 |
1048 | in al, 0x71 |
1059 | call bcd2bin |
1049 | call bcd2bin |
1060 | ror eax, 6 |
1050 | ror eax, 6 |
1061 | 1051 | ||
1062 | mov al, 0x4 ;hour |
1052 | mov al, 0x4 ;hour |
1063 | out 0x70, al |
1053 | out 0x70, al |
1064 | in al, 0x71 |
1054 | in al, 0x71 |
1065 | call bcd2bin |
1055 | call bcd2bin |
1066 | rol eax, 11 |
1056 | rol eax, 11 |
1067 | ret |
1057 | ret |
1068 | 1058 | ||
1069 | 1059 | ||
1070 | set_current_time_for_entry: |
1060 | set_current_time_for_entry: |
1071 | ;----------------------------------------------------- |
1061 | ;----------------------------------------------------- |
1072 | ; Set current time/date for file entry |
1062 | ; Set current time/date for file entry |
1073 | ; input : ebx = file entry pointer |
1063 | ; input : ebx = file entry pointer |
1074 | ;----------------------------------------------------- |
1064 | ;----------------------------------------------------- |
1075 | push eax |
1065 | push eax |
1076 | call get_time_for_file; update files date/time |
1066 | call get_time_for_file; update files date/time |
1077 | mov [ebx+22], ax |
1067 | mov [ebx+22], ax |
1078 | call get_date_for_file |
1068 | call get_date_for_file |
1079 | mov [ebx+24], ax |
1069 | mov [ebx+24], ax |
1080 | pop eax |
1070 | pop eax |
1081 | ret |
1071 | ret |
1082 | 1072 | ||
1083 | 1073 | ||
1084 | 1074 | ||
1085 | add_disk_free_space: |
1075 | add_disk_free_space: |
1086 | ;----------------------------------------------------- |
1076 | ;----------------------------------------------------- |
1087 | ; input : ecx = cluster count |
1077 | ; input : ecx = cluster count |
1088 | ; Note : negative = remove clusters from free space |
1078 | ; Note : negative = remove clusters from free space |
1089 | ; positive = add clusters to free space |
1079 | ; positive = add clusters to free space |
1090 | ;----------------------------------------------------- |
1080 | ;----------------------------------------------------- |
1091 | test ecx, ecx ; no change |
1081 | test ecx, ecx ; no change |
1092 | je add_dfs_no |
1082 | je add_dfs_no |
1093 | cmp [ebp+FAT.fs_type], 32 ; free disk space only used by fat32 |
1083 | cmp [ebp+FAT.fs_type], 32 ; free disk space only used by fat32 |
1094 | jne add_dfs_no |
1084 | jne add_dfs_no |
1095 | 1085 | ||
1096 | push eax ebx |
1086 | push eax ebx |
1097 | mov eax, [ebp+FAT.ADR_FSINFO] |
1087 | mov eax, [ebp+FAT.ADR_FSINFO] |
1098 | lea ebx, [ebp+FAT.fsinfo_buffer] |
1088 | lea ebx, [ebp+FAT.fsinfo_buffer] |
1099 | call fs_read32_sys |
1089 | call fs_read32_sys |
1100 | test eax, eax |
1090 | test eax, eax |
1101 | jnz add_not_fs |
1091 | jnz add_not_fs |
1102 | 1092 | ||
1103 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
1093 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
1104 | jne add_not_fs |
1094 | jne add_not_fs |
1105 | 1095 | ||
1106 | add [ebx+0x1e8], ecx |
1096 | add [ebx+0x1e8], ecx |
1107 | push [ebp+FAT.fatStartScan] |
1097 | push [ebp+FAT.fatStartScan] |
1108 | pop dword [ebx+0x1ec] |
1098 | pop dword [ebx+0x1ec] |
1109 | mov eax, [ebp+FAT.ADR_FSINFO] |
1099 | mov eax, [ebp+FAT.ADR_FSINFO] |
1110 | call fs_write32_sys |
1100 | call fs_write32_sys |
1111 | ; jc add_not_fs |
1101 | ; jc add_not_fs |
1112 | 1102 | ||
1113 | add_not_fs: |
1103 | add_not_fs: |
1114 | pop ebx eax |
1104 | pop ebx eax |
1115 | 1105 | ||
1116 | add_dfs_no: |
1106 | add_dfs_no: |
1117 | ret |
1107 | ret |
1118 | 1108 | ||
1119 | 1109 | ||
1120 | 1110 | ||
1121 | clear_cluster_chain: |
1111 | clear_cluster_chain: |
1122 | ;----------------------------------------------------- |
1112 | ;----------------------------------------------------- |
1123 | ; input : eax = first cluster |
1113 | ; input : eax = first cluster |
1124 | ;----------------------------------------------------- |
1114 | ;----------------------------------------------------- |
1125 | push eax ecx edx |
1115 | push eax ecx edx |
1126 | xor ecx, ecx ; cluster count |
1116 | xor ecx, ecx ; cluster count |
1127 | 1117 | ||
1128 | clean_new_chain: |
1118 | clean_new_chain: |
1129 | cmp eax, [ebp+FAT.LAST_CLUSTER]; end of file |
1119 | cmp eax, [ebp+FAT.LAST_CLUSTER]; end of file |
1130 | ja delete_OK |
1120 | ja delete_OK |
1131 | cmp eax, 2 ; unfinished fat chain or zero length file |
1121 | cmp eax, 2 ; unfinished fat chain or zero length file |
1132 | jb delete_OK |
1122 | jb delete_OK |
1133 | cmp eax, [ebp+FAT.ROOT_CLUSTER]; don't remove root cluster |
1123 | cmp eax, [ebp+FAT.ROOT_CLUSTER]; don't remove root cluster |
1134 | jz delete_OK |
1124 | jz delete_OK |
1135 | 1125 | ||
1136 | xor edx, edx |
1126 | xor edx, edx |
1137 | call set_FAT ; clear fat entry |
1127 | call set_FAT ; clear fat entry |
1138 | jc access_denied_01 |
1128 | jc access_denied_01 |
1139 | 1129 | ||
1140 | inc ecx ; update cluster count |
1130 | inc ecx ; update cluster count |
1141 | mov eax, edx ; old cluster |
1131 | mov eax, edx ; old cluster |
1142 | jmp clean_new_chain |
1132 | jmp clean_new_chain |
1143 | 1133 | ||
1144 | delete_OK: |
1134 | delete_OK: |
1145 | call add_disk_free_space; add clusters to free disk space |
1135 | call add_disk_free_space; add clusters to free disk space |
1146 | clc |
1136 | clc |
1147 | access_denied_01: |
1137 | access_denied_01: |
1148 | pop edx ecx eax |
1138 | pop edx ecx eax |
1149 | ret |
1139 | ret |
1150 | 1140 | ||
1151 | 1141 | ||
1152 | if 0 |
1142 | if 0 |
1153 | get_hd_info: |
1143 | get_hd_info: |
1154 | ;----------------------------------------------------------- |
1144 | ;----------------------------------------------------------- |
1155 | ; output : eax = 0 - ok |
1145 | ; output : eax = 0 - ok |
1156 | ; 3 - unknown FS |
1146 | ; 3 - unknown FS |
1157 | ; 10 - access denied |
1147 | ; 10 - access denied |
1158 | ; edx = cluster size in bytes |
1148 | ; edx = cluster size in bytes |
1159 | ; ebx = total clusters on disk |
1149 | ; ebx = total clusters on disk |
1160 | ; ecx = free clusters on disk |
1150 | ; ecx = free clusters on disk |
1161 | ;----------------------------------------------------------- |
1151 | ;----------------------------------------------------------- |
1162 | cmp [ebp+FAT.fs_type], 16 |
1152 | cmp [ebp+FAT.fs_type], 16 |
1163 | jz info_fat_ok |
1153 | jz info_fat_ok |
1164 | cmp [ebp+FAT.fs_type], 32 |
1154 | cmp [ebp+FAT.fs_type], 32 |
1165 | jz info_fat_ok |
1155 | jz info_fat_ok |
1166 | xor edx, edx |
1156 | xor edx, edx |
1167 | xor ebx, ebx |
1157 | xor ebx, ebx |
1168 | xor ecx, ecx |
1158 | xor ecx, ecx |
1169 | mov eax, ERROR_UNKNOWN_FS |
1159 | mov eax, ERROR_UNKNOWN_FS |
1170 | ret |
1160 | ret |
1171 | 1161 | ||
1172 | info_fat_ok: |
1162 | info_fat_ok: |
1173 | ; call reserve_hd1 |
1163 | ; call reserve_hd1 |
1174 | 1164 | ||
1175 | xor ecx, ecx ; count of free clusters |
1165 | xor ecx, ecx ; count of free clusters |
1176 | mov eax, 2 |
1166 | mov eax, 2 |
1177 | mov ebx, [ebp+FAT.LAST_CLUSTER] |
1167 | mov ebx, [ebp+FAT.LAST_CLUSTER] |
1178 | 1168 | ||
1179 | info_cluster: |
1169 | info_cluster: |
1180 | push eax |
1170 | push eax |
1181 | call get_FAT ; get cluster info |
1171 | call get_FAT ; get cluster info |
1182 | jc info_access_denied |
1172 | jc info_access_denied |
1183 | 1173 | ||
1184 | test eax, eax ; is it free? |
1174 | test eax, eax ; is it free? |
1185 | jnz info_used ; no |
1175 | jnz info_used ; no |
1186 | inc ecx |
1176 | inc ecx |
1187 | 1177 | ||
1188 | info_used: |
1178 | info_used: |
1189 | pop eax |
1179 | pop eax |
1190 | inc eax |
1180 | inc eax |
1191 | cmp eax, ebx ; is above last cluster? |
1181 | cmp eax, ebx ; is above last cluster? |
1192 | jbe info_cluster ; no. test next cluster |
1182 | jbe info_cluster ; no. test next cluster |
1193 | 1183 | ||
1194 | dec ebx ; cluster count |
1184 | dec ebx ; cluster count |
1195 | imul edx, [ebp+FAT.SECTORS_PER_CLUSTER], 512; cluster size in bytes |
1185 | imul edx, [ebp+FAT.SECTORS_PER_CLUSTER], 512; cluster size in bytes |
1196 | xor eax, eax |
1186 | xor eax, eax |
1197 | ret |
1187 | ret |
1198 | 1188 | ||
1199 | info_access_denied: |
1189 | info_access_denied: |
1200 | add esp, 4 |
1190 | add esp, 4 |
1201 | xor edx, edx |
1191 | xor edx, edx |
1202 | xor ebx, ebx |
1192 | xor ebx, ebx |
1203 | xor ecx, ecx |
1193 | xor ecx, ecx |
1204 | mov eax, ERROR_ACCESS_DENIED |
1194 | mov eax, ERROR_ACCESS_DENIED |
1205 | ret |
1195 | ret |
1206 | end if |
1196 | end if |
1207 | 1197 | ||
1208 | update_disk: |
1198 | update_disk: |
1209 | cmp [ebp+FAT.fat_change], 0 ; is fat changed? |
1199 | cmp [ebp+FAT.fat_change], 0 ; is fat changed? |
1210 | je upd_no_change |
1200 | je upd_no_change |
1211 | cmp [ebp+FAT.fs_type], 12 |
1201 | cmp [ebp+FAT.fs_type], 12 |
1212 | jz .fat12 |
1202 | jz .fat12 |
1213 | ;----------------------------------------------------------- |
1203 | ;----------------------------------------------------------- |
1214 | ; write changed fat and cache to disk |
1204 | ; write changed fat and cache to disk |
1215 | ;----------------------------------------------------------- |
1205 | ;----------------------------------------------------------- |
1216 | 1206 | ||
1217 | call write_fat_sector |
1207 | call write_fat_sector |
1218 | jc update_disk_acces_denied |
1208 | jc update_disk_acces_denied |
1219 | jmp upd_no_change |
1209 | jmp upd_no_change |
1220 | .fat12: |
1210 | .fat12: |
1221 | call restorefatchain |
1211 | call restorefatchain |
1222 | mov [ebp+FAT.fat_change], 0 |
1212 | mov [ebp+FAT.fat_change], 0 |
1223 | 1213 | ||
1224 | upd_no_change: |
1214 | upd_no_change: |
1225 | 1215 | ||
1226 | push esi |
1216 | push esi |
1227 | mov esi, [ebp+PARTITION.Disk] |
1217 | mov esi, [ebp+PARTITION.Disk] |
1228 | call disk_sync |
1218 | call disk_sync |
1229 | pop esi |
1219 | pop esi |
1230 | update_disk_acces_denied: |
1220 | update_disk_acces_denied: |
1231 | ret |
1221 | ret |
1232 | 1222 | ||
1233 | fat_lock: |
1223 | fat_lock: |
1234 | lea ecx, [ebp+FAT.Lock] |
1224 | lea ecx, [ebp+FAT.Lock] |
1235 | jmp mutex_lock |
1225 | jmp mutex_lock |
1236 | fat_unlock: |
1226 | fat_unlock: |
1237 | lea ecx, [ebp+FAT.Lock] |
1227 | lea ecx, [ebp+FAT.Lock] |
1238 | jmp mutex_unlock |
1228 | jmp mutex_unlock |
1239 | 1229 | ||
1240 | ; \begin{diamond} |
1230 | ; \begin{diamond} |
1241 | uni2ansi_str: |
1231 | uni2ansi_str: |
1242 | ; convert UNICODE zero-terminated string to ASCII-string (codepage 866) |
1232 | ; convert UNICODE zero-terminated string to ASCII-string (codepage 866) |
1243 | ; in: esi->source, edi->buffer (may be esi=edi) |
1233 | ; in: esi->source, edi->buffer (may be esi=edi) |
1244 | ; destroys: eax,esi,edi |
1234 | ; destroys: eax,esi,edi |
1245 | lodsw |
1235 | lodsw |
1246 | test ax, ax |
1236 | test ax, ax |
1247 | jz .done |
1237 | jz .done |
1248 | cmp ax, 0x80 |
1238 | cmp ax, 0x80 |
1249 | jb .ascii |
1239 | jb .ascii |
1250 | cmp ax, 0x401 |
1240 | cmp ax, 0x401 |
1251 | jz .yo1 |
1241 | jz .yo1 |
1252 | cmp ax, 0x451 |
1242 | cmp ax, 0x451 |
1253 | jz .yo2 |
1243 | jz .yo2 |
1254 | cmp ax, 0x410 |
1244 | cmp ax, 0x410 |
1255 | jb .unk |
1245 | jb .unk |
1256 | cmp ax, 0x440 |
1246 | cmp ax, 0x440 |
1257 | jb .rus1 |
1247 | jb .rus1 |
1258 | cmp ax, 0x450 |
1248 | cmp ax, 0x450 |
1259 | jb .rus2 |
1249 | jb .rus2 |
1260 | .unk: |
1250 | .unk: |
1261 | mov al, '_' |
1251 | mov al, '_' |
1262 | jmp .doit |
1252 | jmp .doit |
1263 | .yo1: |
1253 | .yo1: |
1264 | mov al, 0xF0 ; 'Ё' |
1254 | mov al, 0xF0 ; 'Ё' |
1265 | jmp .doit |
1255 | jmp .doit |
1266 | .yo2: |
1256 | .yo2: |
1267 | mov al, 0xF1 ; 'ё' |
1257 | mov al, 0xF1 ; 'ё' |
1268 | jmp .doit |
1258 | jmp .doit |
1269 | .rus1: |
1259 | .rus1: |
1270 | ; 0x410-0x43F -> 0x80-0xAF |
1260 | ; 0x410-0x43F -> 0x80-0xAF |
1271 | add al, 0x70 |
1261 | add al, 0x70 |
1272 | jmp .doit |
1262 | jmp .doit |
1273 | .rus2: |
1263 | .rus2: |
1274 | ; 0x440-0x44F -> 0xE0-0xEF |
1264 | ; 0x440-0x44F -> 0xE0-0xEF |
1275 | add al, 0xA0 |
1265 | add al, 0xA0 |
1276 | .ascii: |
1266 | .ascii: |
1277 | .doit: |
1267 | .doit: |
1278 | stosb |
1268 | stosb |
1279 | jmp uni2ansi_str |
1269 | jmp uni2ansi_str |
1280 | .done: |
1270 | .done: |
1281 | mov byte [edi], 0 |
1271 | mov byte [edi], 0 |
1282 | ret |
1272 | ret |
1283 | 1273 | ||
1284 | ansi2uni_char: |
1274 | ansi2uni_char: |
1285 | ; convert ANSI character in al to UNICODE character in ax, using cp866 encoding |
1275 | ; convert ANSI character in al to UNICODE character in ax, using cp866 encoding |
1286 | mov ah, 0 |
1276 | mov ah, 0 |
1287 | ; 0x00-0x7F - trivial map |
1277 | ; 0x00-0x7F - trivial map |
1288 | cmp al, 0x80 |
1278 | cmp al, 0x80 |
1289 | jb .ret |
1279 | jb .ret |
1290 | ; 0x80-0xAF -> 0x410-0x43F |
1280 | ; 0x80-0xAF -> 0x410-0x43F |
1291 | cmp al, 0xB0 |
1281 | cmp al, 0xB0 |
1292 | jae @f |
1282 | jae @f |
1293 | add ax, 0x410-0x80 |
1283 | add ax, 0x410-0x80 |
1294 | .ret: |
1284 | .ret: |
1295 | ret |
1285 | ret |
1296 | @@: |
1286 | @@: |
1297 | ; 0xE0-0xEF -> 0x440-0x44F |
1287 | ; 0xE0-0xEF -> 0x440-0x44F |
1298 | cmp al, 0xE0 |
1288 | cmp al, 0xE0 |
1299 | jb .unk |
1289 | jb .unk |
1300 | cmp al, 0xF0 |
1290 | cmp al, 0xF0 |
1301 | jae @f |
1291 | jae @f |
1302 | add ax, 0x440-0xE0 |
1292 | add ax, 0x440-0xE0 |
1303 | ret |
1293 | ret |
1304 | ; 0xF0 -> 0x401 |
1294 | ; 0xF0 -> 0x401 |
1305 | ; 0xF1 -> 0x451 |
1295 | ; 0xF1 -> 0x451 |
1306 | @@: |
1296 | @@: |
1307 | cmp al, 0xF0 ; 'Ё' |
1297 | cmp al, 0xF0 ; 'Ё' |
1308 | jz .yo1 |
1298 | jz .yo1 |
1309 | cmp al, 0xF1 ; 'ё' |
1299 | cmp al, 0xF1 ; 'ё' |
1310 | jz .yo2 |
1300 | jz .yo2 |
1311 | .unk: |
1301 | .unk: |
1312 | mov al, '_' ; ah=0 |
1302 | mov al, '_' ; ah=0 |
1313 | ret |
1303 | ret |
1314 | .yo1: |
1304 | .yo1: |
1315 | mov ax, 0x401 |
1305 | mov ax, 0x401 |
1316 | ret |
1306 | ret |
1317 | .yo2: |
1307 | .yo2: |
1318 | mov ax, 0x451 |
1308 | mov ax, 0x451 |
1319 | ret |
1309 | ret |
1320 | 1310 | ||
1321 | char_toupper: |
1311 | char_toupper: |
1322 | ; convert character to uppercase, using cp866 encoding |
1312 | ; convert character to uppercase, using cp866 encoding |
1323 | ; in: al=symbol |
1313 | ; in: al=symbol |
1324 | ; out: al=converted symbol |
1314 | ; out: al=converted symbol |
1325 | cmp al, 'a' |
1315 | cmp al, 'a' |
1326 | jb .ret |
1316 | jb .ret |
1327 | cmp al, 'z' |
1317 | cmp al, 'z' |
1328 | jbe .az |
1318 | jbe .az |
1329 | cmp al, 0xF1 ; 'ё' |
1319 | cmp al, 0xF1 ; 'ё' |
1330 | jz .yo1 |
1320 | jz .yo1 |
1331 | cmp al, 0xA0 ; 'а' |
1321 | cmp al, 0xA0 ; 'а' |
1332 | jb .ret |
1322 | jb .ret |
1333 | cmp al, 0xE0 ; 'р' |
1323 | cmp al, 0xE0 ; 'р' |
1334 | jb .rus1 |
1324 | jb .rus1 |
1335 | cmp al, 0xEF ; 'я' |
1325 | cmp al, 0xEF ; 'я' |
1336 | ja .ret |
1326 | ja .ret |
1337 | ; 0xE0-0xEF -> 0x90-0x9F |
1327 | ; 0xE0-0xEF -> 0x90-0x9F |
1338 | sub al, 0xE0-0x90 |
1328 | sub al, 0xE0-0x90 |
1339 | .ret: |
1329 | .ret: |
1340 | ret |
1330 | ret |
1341 | .rus1: |
1331 | .rus1: |
1342 | ; 0xA0-0xAF -> 0x80-0x8F |
1332 | ; 0xA0-0xAF -> 0x80-0x8F |
1343 | .az: |
1333 | .az: |
1344 | and al, not 0x20 |
1334 | and al, not 0x20 |
1345 | ret |
1335 | ret |
1346 | .yo1: |
1336 | .yo1: |
1347 | ; 0xF1 -> 0xF0 |
1337 | ; 0xF1 -> 0xF0 |
1348 | dec ax |
1338 | dec ax |
1349 | ret |
1339 | ret |
1350 | 1340 | ||
1351 | fat_get_name: |
1341 | fat_get_name: |
1352 | ; in: edi->FAT entry |
1342 | ; in: edi->FAT entry |
1353 | ; out: CF=1 - no valid entry |
1343 | ; out: CF=1 - no valid entry |
1354 | ; else CF=0 and ebp->ASCIIZ-name |
1344 | ; else CF=0 and ebp->ASCIIZ-name |
1355 | ; (maximum length of filename is 255 (wide) symbols without trailing 0, |
1345 | ; (maximum length of filename is 255 (wide) symbols without trailing 0, |
1356 | ; but implementation requires buffer 261 words) |
1346 | ; but implementation requires buffer 261 words) |
1357 | ; destroys eax |
1347 | ; destroys eax |
1358 | cmp byte [edi], 0 |
1348 | cmp byte [edi], 0 |
1359 | jz .no |
1349 | jz .no |
1360 | cmp byte [edi], 0xE5 |
1350 | cmp byte [edi], 0xE5 |
1361 | jnz @f |
1351 | jnz @f |
1362 | .no: |
1352 | .no: |
1363 | stc |
1353 | stc |
1364 | ret |
1354 | ret |
1365 | @@: |
1355 | @@: |
1366 | cmp byte [edi+11], 0xF |
1356 | cmp byte [edi+11], 0xF |
1367 | jz .longname |
1357 | jz .longname |
1368 | test byte [edi+11], 8 |
1358 | test byte [edi+11], 8 |
1369 | jnz .no |
1359 | jnz .no |
1370 | push ecx |
1360 | push ecx |
1371 | push edi ebp |
1361 | push edi ebp |
1372 | test byte [ebp-4], 1 |
1362 | test byte [ebp-4], 1 |
1373 | jnz .unicode_short |
1363 | jnz .unicode_short |
1374 | 1364 | ||
1375 | mov eax, [edi] |
1365 | mov eax, [edi] |
1376 | mov ecx, [edi+4] |
1366 | mov ecx, [edi+4] |
1377 | mov [ebp], eax |
1367 | mov [ebp], eax |
1378 | mov [ebp+4], ecx |
1368 | mov [ebp+4], ecx |
1379 | 1369 | ||
1380 | mov ecx, 8 |
1370 | mov ecx, 8 |
1381 | @@: |
1371 | @@: |
1382 | cmp byte [ebp+ecx-1], ' ' |
1372 | cmp byte [ebp+ecx-1], ' ' |
1383 | loope @b |
1373 | loope @b |
1384 | 1374 | ||
1385 | mov eax, [edi+8] |
1375 | mov eax, [edi+8] |
1386 | cmp al, ' ' |
1376 | cmp al, ' ' |
1387 | je .done |
1377 | je .done |
1388 | shl eax, 8 |
1378 | shl eax, 8 |
1389 | mov al, '.' |
1379 | mov al, '.' |
1390 | 1380 | ||
1391 | lea ebp, [ebp+ecx+1] |
1381 | lea ebp, [ebp+ecx+1] |
1392 | mov [ebp], eax |
1382 | mov [ebp], eax |
1393 | mov ecx, 3 |
1383 | mov ecx, 3 |
1394 | @@: |
1384 | @@: |
1395 | rol eax, 8 |
1385 | rol eax, 8 |
1396 | cmp al, ' ' |
1386 | cmp al, ' ' |
1397 | jne .done |
1387 | jne .done |
1398 | loop @b |
1388 | loop @b |
1399 | dec ebp |
1389 | dec ebp |
1400 | .done: |
1390 | .done: |
1401 | and byte [ebp+ecx+1], 0 ; CF=0 |
1391 | and byte [ebp+ecx+1], 0 ; CF=0 |
1402 | pop ebp edi ecx |
1392 | pop ebp edi ecx |
1403 | ret |
1393 | ret |
1404 | .unicode_short: |
1394 | .unicode_short: |
1405 | mov ecx, 8 |
1395 | mov ecx, 8 |
1406 | push ecx |
1396 | push ecx |
1407 | @@: |
1397 | @@: |
1408 | mov al, [edi] |
1398 | mov al, [edi] |
1409 | inc edi |
1399 | inc edi |
1410 | call ansi2uni_char |
1400 | call ansi2uni_char |
1411 | mov [ebp], ax |
1401 | mov [ebp], ax |
1412 | inc ebp |
1402 | inc ebp |
1413 | inc ebp |
1403 | inc ebp |
1414 | loop @b |
1404 | loop @b |
1415 | pop ecx |
1405 | pop ecx |
1416 | @@: |
1406 | @@: |
1417 | cmp word [ebp-2], ' ' |
1407 | cmp word [ebp-2], ' ' |
1418 | jnz @f |
1408 | jnz @f |
1419 | dec ebp |
1409 | dec ebp |
1420 | dec ebp |
1410 | dec ebp |
1421 | loop @b |
1411 | loop @b |
1422 | @@: |
1412 | @@: |
1423 | mov word [ebp], '.' |
1413 | mov word [ebp], '.' |
1424 | inc ebp |
1414 | inc ebp |
1425 | inc ebp |
1415 | inc ebp |
1426 | mov ecx, 3 |
1416 | mov ecx, 3 |
1427 | push ecx |
1417 | push ecx |
1428 | @@: |
1418 | @@: |
1429 | mov al, [edi] |
1419 | mov al, [edi] |
1430 | inc edi |
1420 | inc edi |
1431 | call ansi2uni_char |
1421 | call ansi2uni_char |
1432 | mov [ebp], ax |
1422 | mov [ebp], ax |
1433 | inc ebp |
1423 | inc ebp |
1434 | inc ebp |
1424 | inc ebp |
1435 | loop @b |
1425 | loop @b |
1436 | pop ecx |
1426 | pop ecx |
1437 | @@: |
1427 | @@: |
1438 | cmp word [ebp-2], ' ' |
1428 | cmp word [ebp-2], ' ' |
1439 | jnz @f |
1429 | jnz @f |
1440 | dec ebp |
1430 | dec ebp |
1441 | dec ebp |
1431 | dec ebp |
1442 | loop @b |
1432 | loop @b |
1443 | dec ebp |
1433 | dec ebp |
1444 | dec ebp |
1434 | dec ebp |
1445 | @@: |
1435 | @@: |
1446 | and word [ebp], 0 ; CF=0 |
1436 | and word [ebp], 0 ; CF=0 |
1447 | pop ebp edi ecx |
1437 | pop ebp edi ecx |
1448 | ret |
1438 | ret |
1449 | .longname: |
1439 | .longname: |
1450 | ; LFN |
1440 | ; LFN |
1451 | mov al, byte [edi] |
1441 | mov al, byte [edi] |
1452 | and eax, 0x3F |
1442 | and eax, 0x3F |
1453 | dec eax |
1443 | dec eax |
1454 | cmp al, 20 |
1444 | cmp al, 20 |
1455 | jae .no ; ignore invalid entries |
1445 | jae .no ; ignore invalid entries |
1456 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
1446 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
1457 | imul eax, 13*2 |
1447 | imul eax, 13*2 |
1458 | add ebp, eax |
1448 | add ebp, eax |
1459 | test byte [edi], 0x40 |
1449 | test byte [edi], 0x40 |
1460 | jz @f |
1450 | jz @f |
1461 | mov word [ebp+13*2], 0 |
1451 | mov word [ebp+13*2], 0 |
1462 | @@: |
1452 | @@: |
1463 | push eax |
1453 | push eax |
1464 | ; now copy name from edi to ebp ... |
1454 | ; now copy name from edi to ebp ... |
1465 | mov eax, [edi+1] |
1455 | mov eax, [edi+1] |
1466 | mov [ebp], eax ; symbols 1,2 |
1456 | mov [ebp], eax ; symbols 1,2 |
1467 | mov eax, [edi+5] |
1457 | mov eax, [edi+5] |
1468 | mov [ebp+4], eax ; 3,4 |
1458 | mov [ebp+4], eax ; 3,4 |
1469 | mov eax, [edi+9] |
1459 | mov eax, [edi+9] |
1470 | mov [ebp+8], ax ; 5 |
1460 | mov [ebp+8], ax ; 5 |
1471 | mov eax, [edi+14] |
1461 | mov eax, [edi+14] |
1472 | mov [ebp+10], eax ; 6,7 |
1462 | mov [ebp+10], eax ; 6,7 |
1473 | mov eax, [edi+18] |
1463 | mov eax, [edi+18] |
1474 | mov [ebp+14], eax ; 8,9 |
1464 | mov [ebp+14], eax ; 8,9 |
1475 | mov eax, [edi+22] |
1465 | mov eax, [edi+22] |
1476 | mov [ebp+18], eax ; 10,11 |
1466 | mov [ebp+18], eax ; 10,11 |
1477 | mov eax, [edi+28] |
1467 | mov eax, [edi+28] |
1478 | mov [ebp+22], eax ; 12,13 |
1468 | mov [ebp+22], eax ; 12,13 |
1479 | ; ... done |
1469 | ; ... done |
1480 | pop eax |
1470 | pop eax |
1481 | sub ebp, eax |
1471 | sub ebp, eax |
1482 | test eax, eax |
1472 | test eax, eax |
1483 | jz @f |
1473 | jz @f |
1484 | ; if this is not first entry, more processing required |
1474 | ; if this is not first entry, more processing required |
1485 | stc |
1475 | stc |
1486 | ret |
1476 | ret |
1487 | @@: |
1477 | @@: |
1488 | ; if this is first entry: |
1478 | ; if this is first entry: |
1489 | test byte [ebp-4], 1 |
1479 | test byte [ebp-4], 1 |
1490 | jnz .ret |
1480 | jnz .ret |
1491 | ; buffer at ebp contains UNICODE name, convert it to ANSI |
1481 | ; buffer at ebp contains UNICODE name, convert it to ANSI |
1492 | push esi edi |
1482 | push esi edi |
1493 | mov esi, ebp |
1483 | mov esi, ebp |
1494 | mov edi, ebp |
1484 | mov edi, ebp |
1495 | call uni2ansi_str |
1485 | call uni2ansi_str |
1496 | pop edi esi |
1486 | pop edi esi |
1497 | .ret: |
1487 | .ret: |
1498 | clc |
1488 | clc |
1499 | ret |
1489 | ret |
1500 | 1490 | ||
1501 | fat_compare_name: |
1491 | fat_compare_name: |
1502 | ; compares ASCIIZ-names, case-insensitive (cp866 encoding) |
1492 | ; compares ASCIIZ-names, case-insensitive (cp866 encoding) |
1503 | ; in: esi->name, ebp->name |
1493 | ; in: esi->name, ebp->name |
1504 | ; out: if names match: ZF=1 and esi->next component of name |
1494 | ; out: if names match: ZF=1 and esi->next component of name |
1505 | ; else: ZF=0, esi is not changed |
1495 | ; else: ZF=0, esi is not changed |
1506 | ; destroys eax |
1496 | ; destroys eax |
1507 | push ebp esi |
1497 | push ebp esi |
1508 | .loop: |
1498 | .loop: |
1509 | mov al, [ebp] |
1499 | mov al, [ebp] |
1510 | inc ebp |
1500 | inc ebp |
1511 | call char_toupper |
1501 | call char_toupper |
1512 | push eax |
1502 | push eax |
1513 | lodsb |
1503 | lodsb |
1514 | call char_toupper |
1504 | call char_toupper |
1515 | cmp al, [esp] |
1505 | cmp al, [esp] |
1516 | jnz .done |
1506 | jnz .done |
1517 | pop eax |
1507 | pop eax |
1518 | test al, al |
1508 | test al, al |
1519 | jnz .loop |
1509 | jnz .loop |
1520 | dec esi |
1510 | dec esi |
1521 | pop eax |
1511 | pop eax |
1522 | pop ebp |
1512 | pop ebp |
1523 | xor eax, eax ; set ZF flag |
1513 | xor eax, eax ; set ZF flag |
1524 | ret |
1514 | ret |
1525 | .done: |
1515 | .done: |
1526 | cmp al, '/' |
1516 | cmp al, '/' |
1527 | jnz @f |
1517 | jnz @f |
1528 | cmp byte [esp], 0 |
1518 | cmp byte [esp], 0 |
1529 | jnz @f |
1519 | jnz @f |
1530 | mov [esp+4], esi |
1520 | mov [esp+4], esi |
1531 | @@: |
1521 | @@: |
1532 | pop eax |
1522 | pop eax |
1533 | pop esi ebp |
1523 | pop esi ebp |
1534 | ret |
1524 | ret |
1535 | 1525 | ||
1536 | fat_find_lfn: |
1526 | fat_find_lfn: |
1537 | ; in: esi->name |
1527 | ; in: esi->name |
1538 | ; [esp+4] = next |
1528 | ; [esp+4] = next |
1539 | ; [esp+8] = first |
1529 | ; [esp+8] = first |
1540 | ; [esp+C]... - possibly parameters for first and next |
1530 | ; [esp+C]... - possibly parameters for first and next |
1541 | ; out: CF=1 - file not found, eax=error code |
1531 | ; out: CF=1 - file not found, eax=error code |
1542 | ; else CF=0, esi->next name component, edi->direntry |
1532 | ; else CF=0, esi->next name component, edi->direntry |
1543 | pusha |
1533 | pusha |
1544 | lea eax, [esp+0Ch+20h] |
1534 | lea eax, [esp+0Ch+20h] |
1545 | call dword [eax-4] |
1535 | call dword [eax-4] |
1546 | jc .reterr |
1536 | jc .reterr |
1547 | sub esp, 262*2 ; reserve place for LFN |
1537 | sub esp, 262*2 ; reserve place for LFN |
1548 | push 0 ; for fat_get_name: read ASCII name |
1538 | push 0 ; for fat_get_name: read ASCII name |
1549 | .l1: |
1539 | .l1: |
1550 | lea ebp, [esp+4] |
1540 | lea ebp, [esp+4] |
1551 | call fat_get_name |
1541 | call fat_get_name |
1552 | jc .l2 |
1542 | jc .l2 |
1553 | call fat_compare_name |
1543 | call fat_compare_name |
1554 | jz .found |
1544 | jz .found |
1555 | .l2: |
1545 | .l2: |
1556 | mov ebp, [esp+8+262*2+4] |
1546 | mov ebp, [esp+8+262*2+4] |
1557 | lea eax, [esp+0Ch+20h+262*2+4] |
1547 | lea eax, [esp+0Ch+20h+262*2+4] |
1558 | call dword [eax-8] |
1548 | call dword [eax-8] |
1559 | jnc .l1 |
1549 | jnc .l1 |
1560 | add esp, 262*2+4 |
1550 | add esp, 262*2+4 |
1561 | .reterr: |
1551 | .reterr: |
1562 | mov [esp+28], eax |
1552 | mov [esp+28], eax |
1563 | stc |
1553 | stc |
1564 | popa |
1554 | popa |
1565 | ret |
1555 | ret |
1566 | .found: |
1556 | .found: |
1567 | add esp, 262*2+4 |
1557 | add esp, 262*2+4 |
1568 | mov ebp, [esp+8] |
1558 | mov ebp, [esp+8] |
1569 | ; if this is LFN entry, advance to true entry |
1559 | ; if this is LFN entry, advance to true entry |
1570 | cmp byte [edi+11], 0xF |
1560 | cmp byte [edi+11], 0xF |
1571 | jnz @f |
1561 | jnz @f |
1572 | lea eax, [esp+0Ch+20h] |
1562 | lea eax, [esp+0Ch+20h] |
1573 | call dword [eax-8] |
1563 | call dword [eax-8] |
1574 | jc .reterr |
1564 | jc .reterr |
1575 | @@: |
1565 | @@: |
1576 | add esp, 8 ; CF=0 |
1566 | add esp, 8 ; CF=0 |
1577 | push esi |
1567 | push esi |
1578 | push edi |
1568 | push edi |
1579 | popa |
1569 | popa |
1580 | ret |
1570 | ret |
1581 | 1571 | ||
1582 | fat_time_to_bdfe: |
1572 | fat_time_to_bdfe: |
1583 | ; in: eax=FAT time |
1573 | ; in: eax=FAT time |
1584 | ; out: eax=BDFE time |
1574 | ; out: eax=BDFE time |
1585 | push ecx edx |
1575 | push ecx edx |
1586 | mov ecx, eax |
1576 | mov ecx, eax |
1587 | mov edx, eax |
1577 | mov edx, eax |
1588 | shr eax, 11 |
1578 | shr eax, 11 |
1589 | shl eax, 16 ; hours |
1579 | shl eax, 16 ; hours |
1590 | and edx, 0x1F |
1580 | and edx, 0x1F |
1591 | add edx, edx |
1581 | add edx, edx |
1592 | mov al, dl ; seconds |
1582 | mov al, dl ; seconds |
1593 | shr ecx, 5 |
1583 | shr ecx, 5 |
1594 | and ecx, 0x3F |
1584 | and ecx, 0x3F |
1595 | mov ah, cl ; minutes |
1585 | mov ah, cl ; minutes |
1596 | pop edx ecx |
1586 | pop edx ecx |
1597 | ret |
1587 | ret |
1598 | 1588 | ||
1599 | fat_date_to_bdfe: |
1589 | fat_date_to_bdfe: |
1600 | push ecx edx |
1590 | push ecx edx |
1601 | mov ecx, eax |
1591 | mov ecx, eax |
1602 | mov edx, eax |
1592 | mov edx, eax |
1603 | shr eax, 9 |
1593 | shr eax, 9 |
1604 | add ax, 1980 |
1594 | add ax, 1980 |
1605 | shl eax, 16 ; year |
1595 | shl eax, 16 ; year |
1606 | and edx, 0x1F |
1596 | and edx, 0x1F |
1607 | mov al, dl ; day |
1597 | mov al, dl ; day |
1608 | shr ecx, 5 |
1598 | shr ecx, 5 |
1609 | and ecx, 0xF |
1599 | and ecx, 0xF |
1610 | mov ah, cl ; month |
1600 | mov ah, cl ; month |
1611 | pop edx ecx |
1601 | pop edx ecx |
1612 | ret |
1602 | ret |
1613 | 1603 | ||
1614 | bdfe_to_fat_time: |
1604 | bdfe_to_fat_time: |
1615 | push edx |
1605 | push edx |
1616 | mov edx, eax |
1606 | mov edx, eax |
1617 | shr eax, 16 |
1607 | shr eax, 16 |
1618 | and dh, 0x3F |
1608 | and dh, 0x3F |
1619 | shl eax, 6 |
1609 | shl eax, 6 |
1620 | or al, dh |
1610 | or al, dh |
1621 | shr dl, 1 |
1611 | shr dl, 1 |
1622 | and dl, 0x1F |
1612 | and dl, 0x1F |
1623 | shl eax, 5 |
1613 | shl eax, 5 |
1624 | or al, dl |
1614 | or al, dl |
1625 | pop edx |
1615 | pop edx |
1626 | ret |
1616 | ret |
1627 | 1617 | ||
1628 | bdfe_to_fat_date: |
1618 | bdfe_to_fat_date: |
1629 | push edx |
1619 | push edx |
1630 | mov edx, eax |
1620 | mov edx, eax |
1631 | shr eax, 16 |
1621 | shr eax, 16 |
1632 | sub ax, 1980 |
1622 | sub ax, 1980 |
1633 | and dh, 0xF |
1623 | and dh, 0xF |
1634 | shl eax, 4 |
1624 | shl eax, 4 |
1635 | or al, dh |
1625 | or al, dh |
1636 | and dl, 0x1F |
1626 | and dl, 0x1F |
1637 | shl eax, 5 |
1627 | shl eax, 5 |
1638 | or al, dl |
1628 | or al, dl |
1639 | pop edx |
1629 | pop edx |
1640 | ret |
1630 | ret |
1641 | 1631 | ||
1642 | fat_entry_to_bdfe: |
1632 | fat_entry_to_bdfe: |
1643 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
1633 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
1644 | ; destroys eax |
1634 | ; destroys eax |
1645 | mov eax, [ebp-4] |
1635 | mov eax, [ebp-4] |
1646 | mov [esi+4], eax ; ASCII/UNICODE name |
1636 | mov [esi+4], eax ; ASCII/UNICODE name |
1647 | fat_entry_to_bdfe2: |
1637 | fat_entry_to_bdfe2: |
1648 | movzx eax, byte [edi+11] |
1638 | movzx eax, byte [edi+11] |
1649 | mov [esi], eax ; attributes |
1639 | mov [esi], eax ; attributes |
1650 | movzx eax, word [edi+14] |
1640 | movzx eax, word [edi+14] |
1651 | call fat_time_to_bdfe |
1641 | call fat_time_to_bdfe |
1652 | mov [esi+8], eax ; creation time |
1642 | mov [esi+8], eax ; creation time |
1653 | movzx eax, word [edi+16] |
1643 | movzx eax, word [edi+16] |
1654 | call fat_date_to_bdfe |
1644 | call fat_date_to_bdfe |
1655 | mov [esi+12], eax ; creation date |
1645 | mov [esi+12], eax ; creation date |
1656 | and dword [esi+16], 0 ; last access time is not supported on FAT |
1646 | and dword [esi+16], 0 ; last access time is not supported on FAT |
1657 | movzx eax, word [edi+18] |
1647 | movzx eax, word [edi+18] |
1658 | call fat_date_to_bdfe |
1648 | call fat_date_to_bdfe |
1659 | mov [esi+20], eax ; last access date |
1649 | mov [esi+20], eax ; last access date |
1660 | movzx eax, word [edi+22] |
1650 | movzx eax, word [edi+22] |
1661 | call fat_time_to_bdfe |
1651 | call fat_time_to_bdfe |
1662 | mov [esi+24], eax ; last write time |
1652 | mov [esi+24], eax ; last write time |
1663 | movzx eax, word [edi+24] |
1653 | movzx eax, word [edi+24] |
1664 | call fat_date_to_bdfe |
1654 | call fat_date_to_bdfe |
1665 | mov [esi+28], eax ; last write date |
1655 | mov [esi+28], eax ; last write date |
1666 | mov eax, [edi+28] |
1656 | mov eax, [edi+28] |
1667 | mov [esi+32], eax ; file size (low dword) |
1657 | mov [esi+32], eax ; file size (low dword) |
1668 | xor eax, eax |
1658 | xor eax, eax |
1669 | mov [esi+36], eax ; file size (high dword) |
1659 | mov [esi+36], eax ; file size (high dword) |
1670 | test ebp, ebp |
1660 | test ebp, ebp |
1671 | jz .ret |
1661 | jz .ret |
1672 | push ecx edi |
1662 | push ecx edi |
1673 | lea edi, [esi+40] |
1663 | lea edi, [esi+40] |
1674 | mov esi, ebp |
1664 | mov esi, ebp |
1675 | test byte [esi-4], 1 |
1665 | test byte [esi-4], 1 |
1676 | jz .ansi |
1666 | jz .ansi |
1677 | mov ecx, 260/2 |
1667 | mov ecx, 260/2 |
1678 | rep movsd |
1668 | rep movsd |
1679 | mov [edi-2], ax |
1669 | mov [edi-2], ax |
1680 | @@: |
1670 | @@: |
1681 | mov esi, edi |
1671 | mov esi, edi |
1682 | pop edi ecx |
1672 | pop edi ecx |
1683 | .ret: |
1673 | .ret: |
1684 | ret |
1674 | ret |
1685 | .ansi: |
1675 | .ansi: |
1686 | mov ecx, 264/4 |
1676 | mov ecx, 264/4 |
1687 | rep movsd |
1677 | rep movsd |
1688 | mov [edi-1], al |
1678 | mov [edi-1], al |
1689 | jmp @b |
1679 | jmp @b |
1690 | 1680 | ||
1691 | bdfe_to_fat_entry: |
1681 | bdfe_to_fat_entry: |
1692 | ; convert BDFE at edx to FAT entry at edi |
1682 | ; convert BDFE at edx to FAT entry at edi |
1693 | ; destroys eax |
1683 | ; destroys eax |
1694 | ; attributes byte |
1684 | ; attributes byte |
1695 | test byte [edi+11], 8 ; volume label? |
1685 | test byte [edi+11], 8 ; volume label? |
1696 | jnz @f |
1686 | jnz @f |
1697 | mov al, [edx] |
1687 | mov al, [edx] |
1698 | and al, 0x27 |
1688 | and al, 0x27 |
1699 | and byte [edi+11], 0x10 |
1689 | and byte [edi+11], 0x10 |
1700 | or byte [edi+11], al |
1690 | or byte [edi+11], al |
1701 | @@: |
1691 | @@: |
1702 | mov eax, [edx+8] |
1692 | mov eax, [edx+8] |
1703 | call bdfe_to_fat_time |
1693 | call bdfe_to_fat_time |
1704 | mov [edi+14], ax ; creation time |
1694 | mov [edi+14], ax ; creation time |
1705 | mov eax, [edx+12] |
1695 | mov eax, [edx+12] |
1706 | call bdfe_to_fat_date |
1696 | call bdfe_to_fat_date |
1707 | mov [edi+16], ax ; creation date |
1697 | mov [edi+16], ax ; creation date |
1708 | mov eax, [edx+20] |
1698 | mov eax, [edx+20] |
1709 | call bdfe_to_fat_date |
1699 | call bdfe_to_fat_date |
1710 | mov [edi+18], ax ; last access date |
1700 | mov [edi+18], ax ; last access date |
1711 | mov eax, [edx+24] |
1701 | mov eax, [edx+24] |
1712 | call bdfe_to_fat_time |
1702 | call bdfe_to_fat_time |
1713 | mov [edi+22], ax ; last write time |
1703 | mov [edi+22], ax ; last write time |
1714 | mov eax, [edx+28] |
1704 | mov eax, [edx+28] |
1715 | call bdfe_to_fat_date |
1705 | call bdfe_to_fat_date |
1716 | mov [edi+24], ax ; last write date |
1706 | mov [edi+24], ax ; last write date |
1717 | ret |
1707 | ret |
1718 | 1708 | ||
1719 | hd_find_lfn: |
1709 | hd_find_lfn: |
1720 | ; in: ebp -> FAT structure |
1710 | ; in: ebp -> FAT structure |
1721 | ; in: esi+[esp+4] -> name |
1711 | ; in: esi+[esp+4] -> name |
1722 | ; out: CF=1 - file not found, eax=error code |
1712 | ; out: CF=1 - file not found, eax=error code |
1723 | ; else CF=0 and edi->direntry, eax=sector |
1713 | ; else CF=0 and edi->direntry, eax=sector |
1724 | ; destroys eax |
1714 | ; destroys eax |
1725 | push esi edi |
1715 | push esi edi |
1726 | push 0 |
1716 | push 0 |
1727 | push 0 |
1717 | push 0 |
1728 | push fat1x_root_first |
1718 | push fat1x_root_first |
1729 | push fat1x_root_next |
1719 | push fat1x_root_next |
1730 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1720 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1731 | cmp [ebp+FAT.fs_type], 32 |
1721 | cmp [ebp+FAT.fs_type], 32 |
1732 | jz .fat32 |
1722 | jz .fat32 |
1733 | .loop: |
1723 | .loop: |
1734 | and [ebp+FAT.longname_sec1], 0 |
1724 | and [ebp+FAT.longname_sec1], 0 |
1735 | and [ebp+FAT.longname_sec2], 0 |
1725 | and [ebp+FAT.longname_sec2], 0 |
1736 | call fat_find_lfn |
1726 | call fat_find_lfn |
1737 | jc .notfound |
1727 | jc .notfound |
1738 | cmp byte [esi], 0 |
1728 | cmp byte [esi], 0 |
1739 | jz .found |
1729 | jz .found |
1740 | .continue: |
1730 | .continue: |
1741 | test byte [edi+11], 10h |
1731 | test byte [edi+11], 10h |
1742 | jz .notfound |
1732 | jz .notfound |
1743 | and dword [esp+12], 0 |
1733 | and dword [esp+12], 0 |
1744 | mov eax, [edi+20-2] |
1734 | mov eax, [edi+20-2] |
1745 | mov ax, [edi+26] ; cluster |
1735 | mov ax, [edi+26] ; cluster |
1746 | .fat32: |
1736 | .fat32: |
1747 | mov [esp+8], eax |
1737 | mov [esp+8], eax |
1748 | mov dword [esp+4], fat_notroot_first |
1738 | mov dword [esp+4], fat_notroot_first |
1749 | mov dword [esp], fat_notroot_next |
1739 | mov dword [esp], fat_notroot_next |
1750 | jmp .loop |
1740 | jmp .loop |
1751 | .notfound: |
1741 | .notfound: |
1752 | add esp, 16 |
1742 | add esp, 16 |
1753 | pop edi esi |
1743 | pop edi esi |
1754 | stc |
1744 | stc |
1755 | ret 4 |
1745 | ret 4 |
1756 | .found: |
1746 | .found: |
1757 | lea eax, [esp+4+24] |
1747 | lea eax, [esp+4+24] |
1758 | cmp dword [eax], 0 |
1748 | cmp dword [eax], 0 |
1759 | jz @f |
1749 | jz @f |
1760 | mov esi, [eax] |
1750 | mov esi, [eax] |
1761 | and dword [eax], 0 |
1751 | and dword [eax], 0 |
1762 | jmp .continue |
1752 | jmp .continue |
1763 | @@: |
1753 | @@: |
1764 | lea eax, [esp+8] |
1754 | lea eax, [esp+8] |
1765 | cmp dword [eax], 0 |
1755 | cmp dword [eax], 0 |
1766 | jz .root |
1756 | jz .root |
1767 | call fat_get_sector |
1757 | call fat_get_sector |
1768 | jmp .cmn |
1758 | jmp .cmn |
1769 | .root: |
1759 | .root: |
1770 | mov eax, [eax+4] |
1760 | mov eax, [eax+4] |
1771 | add eax, [ebp+FAT.ROOT_START] |
1761 | add eax, [ebp+FAT.ROOT_START] |
1772 | .cmn: |
1762 | .cmn: |
1773 | add esp, 20 ; CF=0 |
1763 | add esp, 20 ; CF=0 |
1774 | pop esi |
1764 | pop esi |
1775 | ret 4 |
1765 | ret 4 |
1776 | 1766 | ||
1777 | ;---------------------------------------------------------------- |
1767 | ;---------------------------------------------------------------- |
1778 | ; fat_Read - FAT implementation of reading a file |
1768 | ; fat_Read - FAT implementation of reading a file |
1779 | ; in: ebp = pointer to FAT structure |
1769 | ; in: ebp = pointer to FAT structure |
1780 | ; in: esi+[esp+4] = name |
1770 | ; in: esi+[esp+4] = name |
1781 | ; in: ebx = pointer to parameters from sysfunc 70 |
1771 | ; in: ebx = pointer to parameters from sysfunc 70 |
1782 | ; out: eax, ebx = return values for sysfunc 70 |
1772 | ; out: eax, ebx = return values for sysfunc 70 |
1783 | ;---------------------------------------------------------------- |
1773 | ;---------------------------------------------------------------- |
1784 | fat_Read: |
1774 | fat_Read: |
1785 | call fat_lock |
1775 | call fat_lock |
1786 | push edi |
1776 | push edi |
1787 | cmp byte [esi], 0 |
1777 | cmp byte [esi], 0 |
1788 | jnz @f |
1778 | jnz @f |
1789 | .noaccess: |
1779 | .noaccess: |
1790 | pop edi |
1780 | pop edi |
1791 | .noaccess_2: |
- | |
1792 | call fat_unlock |
1781 | call fat_unlock |
1793 | or ebx, -1 |
1782 | or ebx, -1 |
1794 | mov eax, ERROR_ACCESS_DENIED |
1783 | mov eax, ERROR_ACCESS_DENIED |
1795 | ret |
1784 | ret |
1796 | - | ||
1797 | @@: |
1785 | @@: |
1798 | stdcall hd_find_lfn, [esp+4+4] |
1786 | stdcall hd_find_lfn, [esp+8] |
1799 | jnc .found |
1787 | jnc .found |
1800 | pop edi |
1788 | pop edi |
1801 | push eax |
1789 | push eax |
1802 | call fat_unlock |
1790 | call fat_unlock |
1803 | pop eax |
1791 | pop eax |
1804 | or ebx, -1 |
1792 | or ebx, -1 |
1805 | ret |
1793 | ret |
1806 | - | ||
1807 | .found: |
1794 | .found: |
1808 | test byte [edi+11], 0x10; do not allow read directories |
1795 | test byte [edi+11], 0x10 ; do not allow read directories |
1809 | jnz .noaccess |
1796 | jnz .noaccess |
1810 | cmp dword [ebx+8], 0 |
1797 | cmp dword [ebx+8], 0 |
1811 | jz @f |
1798 | jz @f |
1812 | xor ebx, ebx |
1799 | xor ebx, ebx |
1813 | .reteof: |
- | |
1814 | call fat_unlock |
1800 | call fat_unlock |
1815 | mov eax, ERROR_END_OF_FILE |
1801 | mov eax, ERROR_END_OF_FILE |
1816 | pop edi |
1802 | pop edi |
1817 | ret |
1803 | ret |
1818 | @@: |
1804 | @@: |
- | 1805 | mov edx, [ebx+4] ; file offset |
|
1819 | mov ecx, [ebx+12] ; size |
1806 | mov ecx, [ebx+12] ; size |
1820 | mov edx, [ebx+16] ; pointer |
1807 | mov ebx, [ebx+16] ; buffer |
1821 | mov ebx, [ebx+4] ; file offset |
- | |
1822 | push edx |
1808 | push ebx |
1823 | push 0 |
1809 | push 0 |
1824 | mov eax, [edi+28] |
1810 | mov eax, [edi+28] |
1825 | sub eax, ebx |
1811 | sub eax, edx |
1826 | jb .eof |
1812 | jb .fileEnd |
1827 | cmp eax, ecx |
1813 | cmp eax, ecx |
1828 | jae @f |
1814 | jae @f |
1829 | mov ecx, eax |
1815 | mov ecx, eax |
1830 | mov byte [esp], 6 |
1816 | mov byte [esp], 6 |
1831 | @@: |
1817 | @@: |
1832 | mov eax, [edi+20-2] |
1818 | mov eax, [edi+20-2] |
1833 | mov ax, [edi+26] |
1819 | mov ax, [edi+26] |
1834 | ; now eax=cluster, ebx=position, ecx=count, edx=buffer for data |
1820 | ; now eax=cluster, ebx=buffer for data, ecx=count, edx=position |
1835 | .new_cluster: |
1821 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
1836 | jecxz .new_sector |
1822 | shl edi, 9 |
- | 1823 | @@: |
|
1837 | cmp eax, 2 |
1824 | cmp eax, 2 |
1838 | jb .eof |
1825 | jb .fileEnd |
1839 | cmp eax, [ebp+FAT.fatRESERVED] |
1826 | cmp eax, [ebp+FAT.fatRESERVED] |
- | 1827 | jae .fileEnd |
|
- | 1828 | sub edx, edi |
|
1840 | jae .eof |
1829 | jc @f |
- | 1830 | call get_FAT |
|
- | 1831 | jc .noaccess2 |
|
- | 1832 | jmp @b |
|
- | 1833 | @@: |
|
1841 | mov [ebp+FAT.cluster_tmp], eax |
1834 | mov esi, eax |
1842 | dec eax |
1835 | dec eax |
1843 | dec eax |
1836 | dec eax |
1844 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
1837 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1845 | imul eax, edi |
- | |
1846 | add eax, [ebp+FAT.DATA_START] |
1838 | add eax, [ebp+FAT.DATA_START] |
1847 | .new_sector: |
- | |
1848 | test ecx, ecx |
- | |
1849 | jz .done |
- | |
1850 | sub ebx, 512 |
- | |
1851 | jae .skip |
- | |
1852 | add ebx, 512 |
1839 | add edx, edi |
1853 | jnz .force_buf |
- | |
1854 | cmp ecx, 512 |
- | |
1855 | jb .force_buf |
1840 | jz .alignedCluster |
1856 | ; we may read directly to given buffer |
- | |
1857 | push eax ebx |
- | |
1858 | mov ebx, edx |
1841 | mov edi, edx |
1859 | call fs_read32_app |
- | |
1860 | test eax, eax |
1842 | shr edi, 9 |
1861 | pop ebx eax |
- | |
1862 | jne .noaccess_1 |
- | |
1863 | add edx, 512 |
1843 | add eax, edi |
1864 | sub ecx, 512 |
1844 | and edx, 511 |
1865 | jmp .skip |
1845 | jz .alignedSector |
1866 | .force_buf: |
1846 | .sectorPiece: |
1867 | ; we must read sector to temporary buffer and then copy it to destination |
- | |
1868 | push eax ebx |
1847 | push eax ebx |
1869 | lea ebx, [ebp+FAT.buffer] |
1848 | lea ebx, [ebp+FAT.buffer] |
1870 | call fs_read32_app |
1849 | call fs_read32_app |
1871 | test eax, eax |
1850 | test eax, eax |
1872 | mov eax, ebx |
1851 | mov eax, ebx |
1873 | pop ebx |
1852 | pop ebx |
1874 | jne .noaccess_3 |
1853 | jne .noaccess3 |
1875 | add eax, ebx |
1854 | add eax, edx |
1876 | push ecx |
1855 | push ecx |
1877 | add ecx, ebx |
1856 | add ecx, edx |
1878 | cmp ecx, 512 |
1857 | cmp ecx, 512 |
1879 | jbe @f |
1858 | jbe @f |
1880 | mov ecx, 512 |
1859 | mov ecx, 512 |
1881 | @@: |
1860 | @@: |
1882 | sub ecx, ebx |
1861 | sub ecx, edx |
1883 | mov ebx, edx |
- | |
1884 | call memmove |
1862 | call memmove |
1885 | add edx, ecx |
- | |
1886 | sub [esp], ecx |
1863 | sub [esp], ecx |
1887 | pop ecx |
1864 | add ebx, ecx |
1888 | pop eax |
1865 | pop ecx eax |
1889 | xor ebx, ebx |
1866 | xor edx, edx |
1890 | .skip: |
1867 | inc edi |
1891 | inc eax |
1868 | inc eax |
- | 1869 | test ecx, ecx |
|
1892 | dec edi |
1870 | jz .done |
- | 1871 | .alignedSector: |
|
- | 1872 | cmp ecx, 512 |
|
1893 | jnz .new_sector |
1873 | jc .sectorPiece |
- | 1874 | shl edi, 9 |
|
- | 1875 | add ecx, edi |
|
1894 | mov eax, [ebp+FAT.cluster_tmp] |
1876 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
- | 1877 | shl edi, 9 |
|
- | 1878 | .alignedCluster: |
|
- | 1879 | cmp ecx, 512 |
|
- | 1880 | jc .sectorPiece |
|
- | 1881 | mov edx, eax |
|
- | 1882 | mov eax, esi |
|
- | 1883 | @@: |
|
- | 1884 | sub ecx, edi |
|
- | 1885 | jbe .readEnd |
|
1895 | call get_FAT |
1886 | call get_FAT |
1896 | jc .noaccess_1 |
1887 | jc .noaccess4 |
1897 | - | ||
- | 1888 | cmp eax, 2 |
|
- | 1889 | jb .fileEnd2 |
|
- | 1890 | cmp eax, [ebp+FAT.fatRESERVED] |
|
- | 1891 | jae .fileEnd2 |
|
- | 1892 | inc esi |
|
1898 | jmp .new_cluster |
1893 | cmp eax, esi |
- | 1894 | jz @b |
|
1899 | .noaccess_3: |
1895 | .fragmentEnd: |
- | 1896 | xchg eax, esi |
|
- | 1897 | dec eax |
|
- | 1898 | dec eax |
|
- | 1899 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
|
- | 1900 | add eax, [ebp+FAT.DATA_START] |
|
- | 1901 | sub eax, edx |
|
- | 1902 | .readFragment: |
|
- | 1903 | push ecx |
|
- | 1904 | mov ecx, eax |
|
- | 1905 | mov eax, edx |
|
- | 1906 | xor edx, edx |
|
- | 1907 | push eax |
|
- | 1908 | call fs_read64_app |
|
- | 1909 | add [esp], ecx |
|
- | 1910 | shl ecx, 9 |
|
- | 1911 | add ebx, ecx |
|
- | 1912 | test eax, eax |
|
1900 | pop eax |
1913 | pop eax |
- | 1914 | jnz .noaccess3 |
|
- | 1915 | pop ecx |
|
- | 1916 | xor edx, edx |
|
- | 1917 | jcxz .done |
|
- | 1918 | cmp ecx, 512 |
|
- | 1919 | jc .sectorPiece |
|
- | 1920 | mov eax, esi |
|
- | 1921 | dec eax |
|
- | 1922 | dec eax |
|
- | 1923 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
|
- | 1924 | add eax, [ebp+FAT.DATA_START] |
|
- | 1925 | jmp .alignedCluster |
|
- | 1926 | .readEnd: |
|
- | 1927 | add ecx, edi |
|
- | 1928 | mov edi, ecx |
|
- | 1929 | and ecx, 511 |
|
- | 1930 | shr edi, 9 |
|
- | 1931 | dec eax |
|
- | 1932 | dec eax |
|
- | 1933 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
|
- | 1934 | add eax, [ebp+FAT.DATA_START] |
|
- | 1935 | sub eax, edx |
|
- | 1936 | add eax, edi |
|
- | 1937 | jmp .readFragment |
|
1901 | .noaccess_1: |
1938 | .noaccess3: |
1902 | pop eax |
1939 | pop eax |
- | 1940 | .noaccess2: |
|
1903 | push ERROR_DEVICE |
1941 | mov byte [esp], ERROR_DEVICE |
1904 | .done: |
1942 | .done: |
1905 | mov ebx, edx |
- | |
1906 | call fat_unlock |
1943 | call fat_unlock |
1907 | pop eax edx edi |
1944 | pop eax edx edi |
1908 | sub ebx, edx |
1945 | sub ebx, edx |
1909 | ret |
1946 | ret |
1910 | .eof: |
1947 | .fileEnd: |
- | 1948 | mov byte [esp], ERROR_END_OF_FILE |
|
1911 | mov ebx, edx |
1949 | jmp .done |
- | 1950 | .noaccess4: |
|
- | 1951 | mov byte [esp], ERROR_DEVICE |
|
- | 1952 | jmp @f |
|
- | 1953 | .fileEnd2: |
|
- | 1954 | mov byte [esp], ERROR_END_OF_FILE |
|
- | 1955 | @@: |
|
1912 | pop eax edx |
1956 | inc esi |
1913 | sub ebx, edx |
1957 | xor ecx, ecx |
1914 | jmp .reteof |
1958 | jmp .fragmentEnd |
1915 | 1959 | ||
1916 | ;---------------------------------------------------------------- |
1960 | ;---------------------------------------------------------------- |
1917 | ; fat_ReadFolder - FAT implementation of reading a folder |
1961 | ; fat_ReadFolder - FAT implementation of reading a folder |
1918 | ; in: ebp = pointer to FAT structure |
1962 | ; in: ebp = pointer to FAT structure |
1919 | ; in: esi+[esp+4] = name |
1963 | ; in: esi+[esp+4] = name |
1920 | ; in: ebx = pointer to parameters from sysfunc 70 |
1964 | ; in: ebx = pointer to parameters from sysfunc 70 |
1921 | ; out: eax, ebx = return values for sysfunc 70 |
1965 | ; out: eax, ebx = return values for sysfunc 70 |
1922 | ;---------------------------------------------------------------- |
1966 | ;---------------------------------------------------------------- |
1923 | fat_ReadFolder: |
1967 | fat_ReadFolder: |
1924 | call fat_lock |
1968 | call fat_lock |
1925 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1969 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1926 | push edi |
1970 | push edi |
1927 | cmp byte [esi], 0 |
1971 | cmp byte [esi], 0 |
1928 | jz .doit |
1972 | jz .doit |
1929 | stdcall hd_find_lfn, [esp+4+4] |
1973 | stdcall hd_find_lfn, [esp+4+4] |
1930 | jnc .found |
1974 | jnc .found |
1931 | pop edi |
1975 | pop edi |
1932 | push eax |
1976 | push eax |
1933 | call fat_unlock |
1977 | call fat_unlock |
1934 | pop eax |
1978 | pop eax |
1935 | or ebx, -1 |
1979 | or ebx, -1 |
1936 | ret |
1980 | ret |
1937 | .found: |
1981 | .found: |
1938 | test byte [edi+11], 0x10 ; do not allow read files |
1982 | test byte [edi+11], 0x10 ; do not allow read files |
1939 | jnz .found_dir |
1983 | jnz .found_dir |
1940 | pop edi |
1984 | pop edi |
1941 | call fat_unlock |
1985 | call fat_unlock |
1942 | or ebx, -1 |
1986 | or ebx, -1 |
1943 | mov eax, ERROR_ACCESS_DENIED |
1987 | mov eax, ERROR_ACCESS_DENIED |
1944 | ret |
1988 | ret |
1945 | .found_dir: |
1989 | .found_dir: |
1946 | mov eax, [edi+20-2] |
1990 | mov eax, [edi+20-2] |
1947 | mov ax, [edi+26] ; eax=cluster |
1991 | mov ax, [edi+26] ; eax=cluster |
1948 | .doit: |
1992 | .doit: |
1949 | push esi |
1993 | push esi |
1950 | sub esp, 262*2 ; reserve space for LFN |
1994 | sub esp, 262*2 ; reserve space for LFN |
1951 | push dword [ebx+8] ; for fat_get_name: read ANSI/UNICODE name |
1995 | push dword [ebx+8] ; for fat_get_name: read ANSI/UNICODE name |
1952 | mov edx, [ebx+16] ; pointer to buffer |
1996 | mov edx, [ebx+16] ; pointer to buffer |
1953 | ; init header |
1997 | ; init header |
1954 | push eax |
1998 | push eax |
1955 | mov edi, edx |
1999 | mov edi, edx |
1956 | mov ecx, 32/4 |
2000 | mov ecx, 32/4 |
1957 | xor eax, eax |
2001 | xor eax, eax |
1958 | rep stosd |
2002 | rep stosd |
1959 | pop eax |
2003 | pop eax |
1960 | mov byte [edx], 1 ; version |
2004 | mov byte [edx], 1 ; version |
1961 | mov esi, edi ; esi points to BDFE |
2005 | mov esi, edi ; esi points to BDFE |
1962 | mov ecx, [ebx+12] ; number of blocks to read |
2006 | mov ecx, [ebx+12] ; number of blocks to read |
1963 | mov ebx, [ebx+4] ; index of the first block |
2007 | mov ebx, [ebx+4] ; index of the first block |
1964 | .new_cluster: |
2008 | .new_cluster: |
1965 | mov [ebp+FAT.cluster_tmp], eax |
2009 | mov [ebp+FAT.cluster_tmp], eax |
1966 | test eax, eax |
2010 | test eax, eax |
1967 | jnz @f |
2011 | jnz @f |
1968 | cmp [ebp+FAT.fs_type], 32 |
2012 | cmp [ebp+FAT.fs_type], 32 |
1969 | jz .notfound |
2013 | jz .notfound |
1970 | mov eax, [ebp+FAT.ROOT_START] |
2014 | mov eax, [ebp+FAT.ROOT_START] |
1971 | push [ebp+FAT.ROOT_SECTORS] |
2015 | push [ebp+FAT.ROOT_SECTORS] |
1972 | push ebx |
2016 | push ebx |
1973 | jmp .new_sector |
2017 | jmp .new_sector |
1974 | @@: |
2018 | @@: |
1975 | dec eax |
2019 | dec eax |
1976 | dec eax |
2020 | dec eax |
1977 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2021 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1978 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
2022 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
1979 | add eax, [ebp+FAT.DATA_START] |
2023 | add eax, [ebp+FAT.DATA_START] |
1980 | push ebx |
2024 | push ebx |
1981 | .new_sector: |
2025 | .new_sector: |
1982 | lea ebx, [ebp+FAT.buffer] |
2026 | lea ebx, [ebp+FAT.buffer] |
1983 | mov edi, ebx |
2027 | mov edi, ebx |
1984 | push eax |
2028 | push eax |
1985 | call fs_read32_sys |
2029 | call fs_read32_sys |
1986 | test eax, eax |
2030 | test eax, eax |
1987 | pop eax |
2031 | pop eax |
1988 | jnz .notfound2 |
2032 | jnz .notfound2 |
1989 | add ebx, 512 |
2033 | add ebx, 512 |
1990 | push eax |
2034 | push eax |
1991 | .l1: |
2035 | .l1: |
1992 | push ebp |
2036 | push ebp |
1993 | lea ebp, [esp+20] |
2037 | lea ebp, [esp+20] |
1994 | call fat_get_name |
2038 | call fat_get_name |
1995 | pop ebp |
2039 | pop ebp |
1996 | jc .l2 |
2040 | jc .l2 |
1997 | cmp byte [edi+11], 0xF |
2041 | cmp byte [edi+11], 0xF |
1998 | jnz .do_bdfe |
2042 | jnz .do_bdfe |
1999 | add edi, 0x20 |
2043 | add edi, 0x20 |
2000 | cmp edi, ebx |
2044 | cmp edi, ebx |
2001 | jb .do_bdfe |
2045 | jb .do_bdfe |
2002 | pop eax |
2046 | pop eax |
2003 | inc eax |
2047 | inc eax |
2004 | dec dword [esp+4] |
2048 | dec dword [esp+4] |
2005 | jnz @f |
2049 | jnz @f |
2006 | mov eax, [ebp+FAT.cluster_tmp] |
2050 | mov eax, [ebp+FAT.cluster_tmp] |
2007 | test eax, eax |
2051 | test eax, eax |
2008 | jz .done |
2052 | jz .done |
2009 | call get_FAT |
2053 | call get_FAT |
2010 | jc .notfound2 |
2054 | jc .notfound2 |
2011 | cmp eax, 2 |
2055 | cmp eax, 2 |
2012 | jb .done |
2056 | jb .done |
2013 | cmp eax, [ebp+FAT.fatRESERVED] |
2057 | cmp eax, [ebp+FAT.fatRESERVED] |
2014 | jae .done |
2058 | jae .done |
2015 | push eax |
2059 | push eax |
2016 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2060 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2017 | mov [esp+8], eax |
2061 | mov [esp+8], eax |
2018 | pop eax |
2062 | pop eax |
2019 | mov [ebp+FAT.cluster_tmp], eax |
2063 | mov [ebp+FAT.cluster_tmp], eax |
2020 | dec eax |
2064 | dec eax |
2021 | dec eax |
2065 | dec eax |
2022 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2066 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2023 | add eax, [ebp+FAT.DATA_START] |
2067 | add eax, [ebp+FAT.DATA_START] |
2024 | @@: |
2068 | @@: |
2025 | lea ebx, [ebp+FAT.buffer] |
2069 | lea ebx, [ebp+FAT.buffer] |
2026 | mov edi, ebx |
2070 | mov edi, ebx |
2027 | push eax |
2071 | push eax |
2028 | call fs_read32_sys |
2072 | call fs_read32_sys |
2029 | test eax, eax |
2073 | test eax, eax |
2030 | pop eax |
2074 | pop eax |
2031 | jnz .notfound2 |
2075 | jnz .notfound2 |
2032 | add ebx, 512 |
2076 | add ebx, 512 |
2033 | push eax |
2077 | push eax |
2034 | .do_bdfe: |
2078 | .do_bdfe: |
2035 | inc dword [edx+8] ; new file found |
2079 | inc dword [edx+8] ; new file found |
2036 | dec dword [esp+4] |
2080 | dec dword [esp+4] |
2037 | jns .l2 |
2081 | jns .l2 |
2038 | dec ecx |
2082 | dec ecx |
2039 | js .l2 |
2083 | js .l2 |
2040 | inc dword [edx+4] ; new file block copied |
2084 | inc dword [edx+4] ; new file block copied |
2041 | push ebp |
2085 | push ebp |
2042 | lea ebp, [esp+20] |
2086 | lea ebp, [esp+20] |
2043 | call fat_entry_to_bdfe |
2087 | call fat_entry_to_bdfe |
2044 | pop ebp |
2088 | pop ebp |
2045 | .l2: |
2089 | .l2: |
2046 | add edi, 0x20 |
2090 | add edi, 0x20 |
2047 | cmp edi, ebx |
2091 | cmp edi, ebx |
2048 | jb .l1 |
2092 | jb .l1 |
2049 | pop eax |
2093 | pop eax |
2050 | inc eax |
2094 | inc eax |
2051 | dec dword [esp+4] |
2095 | dec dword [esp+4] |
2052 | jnz .new_sector |
2096 | jnz .new_sector |
2053 | mov eax, [ebp+FAT.cluster_tmp] |
2097 | mov eax, [ebp+FAT.cluster_tmp] |
2054 | test eax, eax |
2098 | test eax, eax |
2055 | jz .done |
2099 | jz .done |
2056 | call get_FAT |
2100 | call get_FAT |
2057 | jc .notfound2 |
2101 | jc .notfound2 |
2058 | cmp eax, 2 |
2102 | cmp eax, 2 |
2059 | jb .done |
2103 | jb .done |
2060 | cmp eax, [ebp+FAT.fatRESERVED] |
2104 | cmp eax, [ebp+FAT.fatRESERVED] |
2061 | jae .done |
2105 | jae .done |
2062 | push eax |
2106 | push eax |
2063 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2107 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2064 | mov [esp+8], eax |
2108 | mov [esp+8], eax |
2065 | pop eax |
2109 | pop eax |
2066 | pop ebx |
2110 | pop ebx |
2067 | add esp, 4 |
2111 | add esp, 4 |
2068 | jmp .new_cluster |
2112 | jmp .new_cluster |
2069 | .notfound2: |
2113 | .notfound2: |
2070 | add esp, 8 |
2114 | add esp, 8 |
2071 | .notfound: |
2115 | .notfound: |
2072 | add esp, 262*2+4 |
2116 | add esp, 262*2+4 |
2073 | pop esi edi |
2117 | pop esi edi |
2074 | mov ebx, [edx+4] |
2118 | mov ebx, [edx+4] |
2075 | call fat_unlock |
2119 | call fat_unlock |
2076 | mov eax, ERROR_DEVICE |
2120 | mov eax, ERROR_DEVICE |
2077 | ret |
2121 | ret |
2078 | .done: |
2122 | .done: |
2079 | add esp, 262*2+4+8 |
2123 | add esp, 262*2+4+8 |
2080 | mov ebx, [edx+4] |
2124 | mov ebx, [edx+4] |
2081 | xor eax, eax |
2125 | xor eax, eax |
2082 | dec ecx |
2126 | dec ecx |
2083 | js @f |
2127 | js @f |
2084 | mov al, ERROR_END_OF_FILE |
2128 | mov al, ERROR_END_OF_FILE |
2085 | @@: |
2129 | @@: |
2086 | push eax |
2130 | push eax |
2087 | call fat_unlock |
2131 | call fat_unlock |
2088 | pop eax |
2132 | pop eax |
2089 | pop esi edi |
2133 | pop esi edi |
2090 | ret |
2134 | ret |
2091 | 2135 | ||
2092 | fat1x_root_next: |
2136 | fat1x_root_next: |
2093 | push ecx |
2137 | push ecx |
2094 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2138 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2095 | cmp edi, ecx |
2139 | cmp edi, ecx |
2096 | jae fat1x_root_next_sector |
2140 | jae fat1x_root_next_sector |
2097 | pop ecx |
2141 | pop ecx |
2098 | add edi, 0x20 |
2142 | add edi, 0x20 |
2099 | ret ; CF=0 |
2143 | ret ; CF=0 |
2100 | fat1x_root_next_sector: |
2144 | fat1x_root_next_sector: |
2101 | ; read next sector |
2145 | ; read next sector |
2102 | push [ebp+FAT.longname_sec2] |
2146 | push [ebp+FAT.longname_sec2] |
2103 | pop [ebp+FAT.longname_sec1] |
2147 | pop [ebp+FAT.longname_sec1] |
2104 | mov ecx, [eax+4] |
2148 | mov ecx, [eax+4] |
2105 | push ecx |
2149 | push ecx |
2106 | add ecx, [ebp+FAT.ROOT_START] |
2150 | add ecx, [ebp+FAT.ROOT_START] |
2107 | mov [ebp+FAT.longname_sec2], ecx |
2151 | mov [ebp+FAT.longname_sec2], ecx |
2108 | pop ecx |
2152 | pop ecx |
2109 | inc ecx |
2153 | inc ecx |
2110 | mov [eax+4], ecx |
2154 | mov [eax+4], ecx |
2111 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
2155 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
2112 | pop ecx |
2156 | pop ecx |
2113 | jb fat1x_root_first |
2157 | jb fat1x_root_first |
2114 | mov eax, ERROR_FILE_NOT_FOUND |
2158 | mov eax, ERROR_FILE_NOT_FOUND |
2115 | stc |
2159 | stc |
2116 | ret |
2160 | ret |
2117 | fat1x_root_first: |
2161 | fat1x_root_first: |
2118 | mov eax, [eax+4] |
2162 | mov eax, [eax+4] |
2119 | add eax, [ebp+FAT.ROOT_START] |
2163 | add eax, [ebp+FAT.ROOT_START] |
2120 | push ebx |
2164 | push ebx |
2121 | lea edi, [ebp+FAT.buffer] |
2165 | lea edi, [ebp+FAT.buffer] |
2122 | mov ebx, edi |
2166 | mov ebx, edi |
2123 | call fs_read32_sys |
2167 | call fs_read32_sys |
2124 | pop ebx |
2168 | pop ebx |
2125 | test eax, eax |
2169 | test eax, eax |
2126 | jnz .readerr |
2170 | jnz .readerr |
2127 | ret ; CF=0 |
2171 | ret ; CF=0 |
2128 | .readerr: |
2172 | .readerr: |
2129 | mov eax, ERROR_DEVICE |
2173 | mov eax, ERROR_DEVICE |
2130 | stc |
2174 | stc |
2131 | ret |
2175 | ret |
2132 | .notfound: |
2176 | .notfound: |
2133 | mov eax, ERROR_FILE_NOT_FOUND |
2177 | mov eax, ERROR_FILE_NOT_FOUND |
2134 | stc |
2178 | stc |
2135 | ret |
2179 | ret |
2136 | fat1x_root_begin_write: |
2180 | fat1x_root_begin_write: |
2137 | push edi eax |
2181 | push edi eax |
2138 | call fat1x_root_first |
2182 | call fat1x_root_first |
2139 | pop eax edi |
2183 | pop eax edi |
2140 | ret |
2184 | ret |
2141 | fat1x_root_end_write: |
2185 | fat1x_root_end_write: |
2142 | pusha |
2186 | pusha |
2143 | mov eax, [eax+4] |
2187 | mov eax, [eax+4] |
2144 | add eax, [ebp+FAT.ROOT_START] |
2188 | add eax, [ebp+FAT.ROOT_START] |
2145 | lea ebx, [ebp+FAT.buffer] |
2189 | lea ebx, [ebp+FAT.buffer] |
2146 | call fs_write32_sys |
2190 | call fs_write32_sys |
2147 | popa |
2191 | popa |
2148 | ret |
2192 | ret |
2149 | fat1x_root_next_write: |
2193 | fat1x_root_next_write: |
2150 | push ecx |
2194 | push ecx |
2151 | lea ecx, [ebp+FAT.buffer+0x200] |
2195 | lea ecx, [ebp+FAT.buffer+0x200] |
2152 | cmp edi, ecx |
2196 | cmp edi, ecx |
2153 | jae @f |
2197 | jae @f |
2154 | pop ecx |
2198 | pop ecx |
2155 | ret |
2199 | ret |
2156 | @@: |
2200 | @@: |
2157 | call fat1x_root_end_write |
2201 | call fat1x_root_end_write |
2158 | jmp fat1x_root_next_sector |
2202 | jmp fat1x_root_next_sector |
2159 | fat1x_root_extend_dir: |
2203 | fat1x_root_extend_dir: |
2160 | stc |
2204 | stc |
2161 | ret |
2205 | ret |
2162 | 2206 | ||
2163 | fat_notroot_next: |
2207 | fat_notroot_next: |
2164 | push ecx |
2208 | push ecx |
2165 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2209 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2166 | cmp edi, ecx |
2210 | cmp edi, ecx |
2167 | jae fat_notroot_next_sector |
2211 | jae fat_notroot_next_sector |
2168 | pop ecx |
2212 | pop ecx |
2169 | add edi, 0x20 |
2213 | add edi, 0x20 |
2170 | ret ; CF=0 |
2214 | ret ; CF=0 |
2171 | fat_notroot_next_sector: |
2215 | fat_notroot_next_sector: |
2172 | push [ebp+FAT.longname_sec2] |
2216 | push [ebp+FAT.longname_sec2] |
2173 | pop [ebp+FAT.longname_sec1] |
2217 | pop [ebp+FAT.longname_sec1] |
2174 | push eax |
2218 | push eax |
2175 | call fat_get_sector |
2219 | call fat_get_sector |
2176 | mov [ebp+FAT.longname_sec2], eax |
2220 | mov [ebp+FAT.longname_sec2], eax |
2177 | pop eax |
2221 | pop eax |
2178 | mov ecx, [eax+4] |
2222 | mov ecx, [eax+4] |
2179 | inc ecx |
2223 | inc ecx |
2180 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2224 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2181 | jae fat_notroot_next_cluster |
2225 | jae fat_notroot_next_cluster |
2182 | mov [eax+4], ecx |
2226 | mov [eax+4], ecx |
2183 | jmp @f |
2227 | jmp @f |
2184 | fat_notroot_next_cluster: |
2228 | fat_notroot_next_cluster: |
2185 | push eax |
2229 | push eax |
2186 | mov eax, [eax] |
2230 | mov eax, [eax] |
2187 | call get_FAT |
2231 | call get_FAT |
2188 | mov ecx, eax |
2232 | mov ecx, eax |
2189 | pop eax |
2233 | pop eax |
2190 | jc fat_notroot_first.deverr |
2234 | jc fat_notroot_first.deverr |
2191 | cmp ecx, 2 |
2235 | cmp ecx, 2 |
2192 | jb fat_notroot_next_err |
2236 | jb fat_notroot_next_err |
2193 | cmp ecx, [ebp+FAT.fatRESERVED] |
2237 | cmp ecx, [ebp+FAT.fatRESERVED] |
2194 | jae fat_notroot_next_err |
2238 | jae fat_notroot_next_err |
2195 | mov [eax], ecx |
2239 | mov [eax], ecx |
2196 | and dword [eax+4], 0 |
2240 | and dword [eax+4], 0 |
2197 | @@: |
2241 | @@: |
2198 | pop ecx |
2242 | pop ecx |
2199 | fat_notroot_first: |
2243 | fat_notroot_first: |
2200 | call fat_get_sector |
2244 | call fat_get_sector |
2201 | push ebx |
2245 | push ebx |
2202 | lea edi, [ebp+FAT.buffer] |
2246 | lea edi, [ebp+FAT.buffer] |
2203 | mov ebx, edi |
2247 | mov ebx, edi |
2204 | call fs_read32_sys |
2248 | call fs_read32_sys |
2205 | pop ebx |
2249 | pop ebx |
2206 | test eax, eax |
2250 | test eax, eax |
2207 | jz .ret ; CF=0 |
2251 | jz .ret ; CF=0 |
2208 | push ecx |
2252 | push ecx |
2209 | .deverr: |
2253 | .deverr: |
2210 | pop ecx |
2254 | pop ecx |
2211 | mov eax, ERROR_DEVICE |
2255 | mov eax, ERROR_DEVICE |
2212 | stc |
2256 | stc |
2213 | .ret: |
2257 | .ret: |
2214 | ret |
2258 | ret |
2215 | fat_notroot_next_err: |
2259 | fat_notroot_next_err: |
2216 | pop ecx |
2260 | pop ecx |
2217 | mov eax, ERROR_FILE_NOT_FOUND |
2261 | mov eax, ERROR_FILE_NOT_FOUND |
2218 | stc |
2262 | stc |
2219 | ret |
2263 | ret |
2220 | fat_notroot_begin_write: |
2264 | fat_notroot_begin_write: |
2221 | push eax edi |
2265 | push eax edi |
2222 | call fat_notroot_first |
2266 | call fat_notroot_first |
2223 | pop edi eax |
2267 | pop edi eax |
2224 | ret |
2268 | ret |
2225 | fat_notroot_end_write: |
2269 | fat_notroot_end_write: |
2226 | call fat_get_sector |
2270 | call fat_get_sector |
2227 | push ebx |
2271 | push ebx |
2228 | lea ebx, [ebp+FAT.buffer] |
2272 | lea ebx, [ebp+FAT.buffer] |
2229 | call fs_write32_sys |
2273 | call fs_write32_sys |
2230 | pop ebx |
2274 | pop ebx |
2231 | ret |
2275 | ret |
2232 | fat_notroot_next_write: |
2276 | fat_notroot_next_write: |
2233 | push ecx |
2277 | push ecx |
2234 | lea ecx, [ebp+FAT.buffer+0x200] |
2278 | lea ecx, [ebp+FAT.buffer+0x200] |
2235 | cmp edi, ecx |
2279 | cmp edi, ecx |
2236 | jae @f |
2280 | jae @f |
2237 | pop ecx |
2281 | pop ecx |
2238 | ret |
2282 | ret |
2239 | @@: |
2283 | @@: |
2240 | push eax |
2284 | push eax |
2241 | call fat_notroot_end_write |
2285 | call fat_notroot_end_write |
2242 | pop eax |
2286 | pop eax |
2243 | jmp fat_notroot_next_sector |
2287 | jmp fat_notroot_next_sector |
2244 | fat_notroot_extend_dir: |
2288 | fat_notroot_extend_dir: |
2245 | push eax |
2289 | push eax |
2246 | call get_free_FAT |
2290 | call get_free_FAT |
2247 | jnc .found |
2291 | jnc .found |
2248 | pop eax |
2292 | pop eax |
2249 | ret ; CF=1 |
2293 | ret ; CF=1 |
2250 | .found: |
2294 | .found: |
2251 | push edx |
2295 | push edx |
2252 | mov edx, [ebp+FAT.fatEND] |
2296 | mov edx, [ebp+FAT.fatEND] |
2253 | call set_FAT |
2297 | call set_FAT |
2254 | jc .writeerr |
2298 | jc .writeerr |
2255 | mov edx, eax |
2299 | mov edx, eax |
2256 | mov eax, [esp+4] |
2300 | mov eax, [esp+4] |
2257 | mov eax, [eax] |
2301 | mov eax, [eax] |
2258 | push edx |
2302 | push edx |
2259 | call set_FAT |
2303 | call set_FAT |
2260 | pop edx |
2304 | pop edx |
2261 | jnc @f |
2305 | jnc @f |
2262 | .writeerr: |
2306 | .writeerr: |
2263 | pop edx |
2307 | pop edx |
2264 | pop eax |
2308 | pop eax |
2265 | stc |
2309 | stc |
2266 | ret |
2310 | ret |
2267 | @@: |
2311 | @@: |
2268 | push ecx |
2312 | push ecx |
2269 | or ecx, -1 |
2313 | or ecx, -1 |
2270 | call add_disk_free_space |
2314 | call add_disk_free_space |
2271 | ; zero new cluster |
2315 | ; zero new cluster |
2272 | mov ecx, 512/4 |
2316 | mov ecx, 512/4 |
2273 | lea edi, [ebp+FAT.buffer] |
2317 | lea edi, [ebp+FAT.buffer] |
2274 | push edi |
2318 | push edi |
2275 | xor eax, eax |
2319 | xor eax, eax |
2276 | rep stosd |
2320 | rep stosd |
2277 | pop edi |
2321 | pop edi |
2278 | pop ecx |
2322 | pop ecx |
2279 | mov eax, [esp+4] |
2323 | mov eax, [esp+4] |
2280 | mov [eax], edx |
2324 | mov [eax], edx |
2281 | and dword [eax+4], 0 |
2325 | and dword [eax+4], 0 |
2282 | pop edx |
2326 | pop edx |
2283 | mov eax, [eax] |
2327 | mov eax, [eax] |
2284 | dec eax |
2328 | dec eax |
2285 | dec eax |
2329 | dec eax |
2286 | push ebx ecx |
2330 | push ebx ecx |
2287 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2331 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2288 | imul eax, ecx |
2332 | imul eax, ecx |
2289 | add eax, [ebp+FAT.DATA_START] |
2333 | add eax, [ebp+FAT.DATA_START] |
2290 | mov ebx, edi |
2334 | mov ebx, edi |
2291 | @@: |
2335 | @@: |
2292 | push eax |
2336 | push eax |
2293 | call fs_write32_sys |
2337 | call fs_write32_sys |
2294 | pop eax |
2338 | pop eax |
2295 | inc eax |
2339 | inc eax |
2296 | loop @b |
2340 | loop @b |
2297 | pop ecx ebx eax |
2341 | pop ecx ebx eax |
2298 | clc |
2342 | clc |
2299 | ret |
2343 | ret |
2300 | 2344 | ||
2301 | fat_get_sector: |
2345 | fat_get_sector: |
2302 | push ecx |
2346 | push ecx |
2303 | mov ecx, [eax] |
2347 | mov ecx, [eax] |
2304 | dec ecx |
2348 | dec ecx |
2305 | dec ecx |
2349 | dec ecx |
2306 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2350 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2307 | add ecx, [ebp+FAT.DATA_START] |
2351 | add ecx, [ebp+FAT.DATA_START] |
2308 | add ecx, [eax+4] |
2352 | add ecx, [eax+4] |
2309 | mov eax, ecx |
2353 | mov eax, ecx |
2310 | pop ecx |
2354 | pop ecx |
2311 | ret |
2355 | ret |
2312 | 2356 | ||
2313 | fshrad: |
2357 | fshrad: |
2314 | call fat_unlock |
2358 | call fat_unlock |
2315 | mov eax, ERROR_ACCESS_DENIED |
2359 | mov eax, ERROR_ACCESS_DENIED |
2316 | xor ebx, ebx |
2360 | xor ebx, ebx |
2317 | ret |
2361 | ret |
2318 | 2362 | ||
2319 | ;---------------------------------------------------------------- |
2363 | ;---------------------------------------------------------------- |
2320 | ; fat_CreateFolder - FAT implementation of creating a folder |
2364 | ; fat_CreateFolder - FAT implementation of creating a folder |
2321 | ; in: ebp = pointer to FAT structure |
2365 | ; in: ebp = pointer to FAT structure |
2322 | ; in: esi+[esp+4] = name |
2366 | ; in: esi+[esp+4] = name |
2323 | ; in: ebx = pointer to parameters from sysfunc 70 |
2367 | ; in: ebx = pointer to parameters from sysfunc 70 |
2324 | ; out: eax, ebx = return values for sysfunc 70 |
2368 | ; out: eax, ebx = return values for sysfunc 70 |
2325 | ;---------------------------------------------------------------- |
2369 | ;---------------------------------------------------------------- |
2326 | fat_CreateFolder: |
2370 | fat_CreateFolder: |
2327 | push 1 |
2371 | push 1 |
2328 | jmp fat_Rewrite.common |
2372 | jmp fat_Rewrite.common |
2329 | 2373 | ||
2330 | ;---------------------------------------------------------------- |
2374 | ;---------------------------------------------------------------- |
2331 | ; fat_Rewrite - FAT implementation of creating a new file |
2375 | ; fat_Rewrite - FAT implementation of creating a new file |
2332 | ; in: ebp = pointer to FAT structure |
2376 | ; in: ebp = pointer to FAT structure |
2333 | ; in: esi+[esp+4] = name |
2377 | ; in: esi+[esp+4] = name |
2334 | ; in: ebx = pointer to parameters from sysfunc 70 |
2378 | ; in: ebx = pointer to parameters from sysfunc 70 |
2335 | ; out: eax, ebx = return values for sysfunc 70 |
2379 | ; out: eax, ebx = return values for sysfunc 70 |
2336 | ;---------------------------------------------------------------- |
2380 | ;---------------------------------------------------------------- |
2337 | fat_Rewrite: |
2381 | fat_Rewrite: |
2338 | push 0 |
2382 | push 0 |
2339 | .common: |
2383 | .common: |
2340 | call fat_lock |
2384 | call fat_lock |
2341 | pop eax |
2385 | pop eax |
2342 | cmp byte [esi], 0 |
2386 | cmp byte [esi], 0 |
2343 | jz fshrad |
2387 | jz fshrad |
2344 | mov ecx, [ebx+12] |
2388 | mov ecx, [ebx+12] |
2345 | mov edx, [ebx+16] |
2389 | mov edx, [ebx+16] |
2346 | pushad |
2390 | pushad |
2347 | xor edi, edi |
2391 | xor edi, edi |
2348 | mov edx, [esp+4+20h] |
2392 | mov edx, [esp+4+20h] |
2349 | push esi |
2393 | push esi |
2350 | test edx, edx |
2394 | test edx, edx |
2351 | jz @f |
2395 | jz @f |
2352 | mov esi, edx |
2396 | mov esi, edx |
2353 | @@: |
2397 | @@: |
2354 | lodsb |
2398 | lodsb |
2355 | test al, al |
2399 | test al, al |
2356 | jz @f |
2400 | jz @f |
2357 | cmp al, '/' |
2401 | cmp al, '/' |
2358 | jnz @b |
2402 | jnz @b |
2359 | lea edi, [esi-1] |
2403 | lea edi, [esi-1] |
2360 | jmp @b |
2404 | jmp @b |
2361 | @@: |
2405 | @@: |
2362 | pop esi |
2406 | pop esi |
2363 | test edi, edi |
2407 | test edi, edi |
2364 | jnz .noroot |
2408 | jnz .noroot |
2365 | test edx, edx |
2409 | test edx, edx |
2366 | jnz .hasebp |
2410 | jnz .hasebp |
2367 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
2411 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
2368 | cmp [ebp+FAT.fs_type], 32 |
2412 | cmp [ebp+FAT.fs_type], 32 |
2369 | jz .pushnotroot |
2413 | jz .pushnotroot |
2370 | xor edx, edx |
2414 | xor edx, edx |
2371 | push edx |
2415 | push edx |
2372 | push fat1x_root_extend_dir |
2416 | push fat1x_root_extend_dir |
2373 | push fat1x_root_end_write |
2417 | push fat1x_root_end_write |
2374 | push fat1x_root_next_write |
2418 | push fat1x_root_next_write |
2375 | push fat1x_root_begin_write |
2419 | push fat1x_root_begin_write |
2376 | push edx |
2420 | push edx |
2377 | push edx |
2421 | push edx |
2378 | push fat1x_root_first |
2422 | push fat1x_root_first |
2379 | push fat1x_root_next |
2423 | push fat1x_root_next |
2380 | jmp .common1 |
2424 | jmp .common1 |
2381 | .hasebp: |
2425 | .hasebp: |
2382 | mov eax, ERROR_ACCESS_DENIED |
2426 | mov eax, ERROR_ACCESS_DENIED |
2383 | cmp byte [edx], 0 |
2427 | cmp byte [edx], 0 |
2384 | jz .ret1 |
2428 | jz .ret1 |
2385 | stdcall hd_find_lfn, 0 |
2429 | stdcall hd_find_lfn, 0 |
2386 | mov esi, [esp+4+20h] |
2430 | mov esi, [esp+4+20h] |
2387 | jc .ret1 |
2431 | jc .ret1 |
2388 | jmp .common0 |
2432 | jmp .common0 |
2389 | .noroot: |
2433 | .noroot: |
2390 | mov eax, ERROR_ACCESS_DENIED |
2434 | mov eax, ERROR_ACCESS_DENIED |
2391 | cmp byte [edi+1], 0 |
2435 | cmp byte [edi+1], 0 |
2392 | jz .ret1 |
2436 | jz .ret1 |
2393 | ; check existence |
2437 | ; check existence |
2394 | mov byte [edi], 0 |
2438 | mov byte [edi], 0 |
2395 | push edi |
2439 | push edi |
2396 | stdcall hd_find_lfn, [esp+4+24h] |
2440 | stdcall hd_find_lfn, [esp+4+24h] |
2397 | pop esi |
2441 | pop esi |
2398 | mov byte [esi], '/' |
2442 | mov byte [esi], '/' |
2399 | jnc @f |
2443 | jnc @f |
2400 | .notfound0: |
2444 | .notfound0: |
2401 | mov eax, ERROR_FILE_NOT_FOUND |
2445 | mov eax, ERROR_FILE_NOT_FOUND |
2402 | .ret1: |
2446 | .ret1: |
2403 | mov [esp+28], eax |
2447 | mov [esp+28], eax |
2404 | call fat_unlock |
2448 | call fat_unlock |
2405 | popad |
2449 | popad |
2406 | xor ebx, ebx |
2450 | xor ebx, ebx |
2407 | ret |
2451 | ret |
2408 | @@: |
2452 | @@: |
2409 | inc esi |
2453 | inc esi |
2410 | .common0: |
2454 | .common0: |
2411 | test byte [edi+11], 0x10 ; must be directory |
2455 | test byte [edi+11], 0x10 ; must be directory |
2412 | mov eax, ERROR_ACCESS_DENIED |
2456 | mov eax, ERROR_ACCESS_DENIED |
2413 | jz .ret1 |
2457 | jz .ret1 |
2414 | mov edx, [edi+20-2] |
2458 | mov edx, [edi+20-2] |
2415 | mov dx, [edi+26] ; ebp=cluster |
2459 | mov dx, [edi+26] ; ebp=cluster |
2416 | mov eax, ERROR_FAT_TABLE |
2460 | mov eax, ERROR_FAT_TABLE |
2417 | cmp edx, 2 |
2461 | cmp edx, 2 |
2418 | jb .ret1 |
2462 | jb .ret1 |
2419 | .pushnotroot: |
2463 | .pushnotroot: |
2420 | push edx |
2464 | push edx |
2421 | push fat_notroot_extend_dir |
2465 | push fat_notroot_extend_dir |
2422 | push fat_notroot_end_write |
2466 | push fat_notroot_end_write |
2423 | push fat_notroot_next_write |
2467 | push fat_notroot_next_write |
2424 | push fat_notroot_begin_write |
2468 | push fat_notroot_begin_write |
2425 | push 0 |
2469 | push 0 |
2426 | push edx |
2470 | push edx |
2427 | push fat_notroot_first |
2471 | push fat_notroot_first |
2428 | push fat_notroot_next |
2472 | push fat_notroot_next |
2429 | .common1: |
2473 | .common1: |
2430 | call fat_find_lfn |
2474 | call fat_find_lfn |
2431 | jc .notfound |
2475 | jc .notfound |
2432 | ; found |
2476 | ; found |
2433 | test byte [edi+11], 10h |
2477 | test byte [edi+11], 10h |
2434 | jz .exists_file |
2478 | jz .exists_file |
2435 | ; found directory; if we are creating directory, return OK, |
2479 | ; found directory; if we are creating directory, return OK, |
2436 | ; if we are creating file, say "access denied" |
2480 | ; if we are creating file, say "access denied" |
2437 | add esp, 36 |
2481 | add esp, 36 |
2438 | call fat_unlock |
2482 | call fat_unlock |
2439 | popad |
2483 | popad |
2440 | test al, al |
2484 | test al, al |
2441 | mov eax, ERROR_ACCESS_DENIED |
2485 | mov eax, ERROR_ACCESS_DENIED |
2442 | jz @f |
2486 | jz @f |
2443 | mov al, 0 |
2487 | mov al, 0 |
2444 | @@: |
2488 | @@: |
2445 | xor ebx, ebx |
2489 | xor ebx, ebx |
2446 | ret |
2490 | ret |
2447 | .exists_file: |
2491 | .exists_file: |
2448 | ; found file; if we are creating directory, return "access denied", |
2492 | ; found file; if we are creating directory, return "access denied", |
2449 | ; if we are creating file, delete existing file and continue |
2493 | ; if we are creating file, delete existing file and continue |
2450 | cmp byte [esp+36+28], 0 |
2494 | cmp byte [esp+36+28], 0 |
2451 | jz @f |
2495 | jz @f |
2452 | add esp, 36 |
2496 | add esp, 36 |
2453 | call fat_unlock |
2497 | call fat_unlock |
2454 | popad |
2498 | popad |
2455 | mov eax, ERROR_ACCESS_DENIED |
2499 | mov eax, ERROR_ACCESS_DENIED |
2456 | xor ebx, ebx |
2500 | xor ebx, ebx |
2457 | ret |
2501 | ret |
2458 | @@: |
2502 | @@: |
2459 | ; delete FAT chain |
2503 | ; delete FAT chain |
2460 | push edi |
2504 | push edi |
2461 | xor eax, eax |
2505 | xor eax, eax |
2462 | mov dword [edi+28], eax ; zero size |
2506 | mov dword [edi+28], eax ; zero size |
2463 | xor ecx, ecx |
2507 | xor ecx, ecx |
2464 | mov eax, [edi+20-2] |
2508 | mov eax, [edi+20-2] |
2465 | mov ax, [edi+26] |
2509 | mov ax, [edi+26] |
2466 | mov word [edi+20], cx |
2510 | mov word [edi+20], cx |
2467 | mov word [edi+26], cx |
2511 | mov word [edi+26], cx |
2468 | test eax, eax |
2512 | test eax, eax |
2469 | jz .done1 |
2513 | jz .done1 |
2470 | @@: |
2514 | @@: |
2471 | cmp eax, [ebp+FAT.fatRESERVED] |
2515 | cmp eax, [ebp+FAT.fatRESERVED] |
2472 | jae .done1 |
2516 | jae .done1 |
2473 | push edx |
2517 | push edx |
2474 | xor edx, edx |
2518 | xor edx, edx |
2475 | call set_FAT |
2519 | call set_FAT |
2476 | mov eax, edx |
2520 | mov eax, edx |
2477 | pop edx |
2521 | pop edx |
2478 | jc .done1 |
2522 | jc .done1 |
2479 | inc ecx |
2523 | inc ecx |
2480 | jmp @b |
2524 | jmp @b |
2481 | .done1: |
2525 | .done1: |
2482 | pop edi |
2526 | pop edi |
2483 | call get_time_for_file |
2527 | call get_time_for_file |
2484 | mov [edi+22], ax |
2528 | mov [edi+22], ax |
2485 | call get_date_for_file |
2529 | call get_date_for_file |
2486 | mov [edi+24], ax |
2530 | mov [edi+24], ax |
2487 | mov [edi+18], ax |
2531 | mov [edi+18], ax |
2488 | or byte [edi+11], 20h ; set 'archive' attribute |
2532 | or byte [edi+11], 20h ; set 'archive' attribute |
2489 | jmp .doit |
2533 | jmp .doit |
2490 | .notfound: |
2534 | .notfound: |
2491 | ; file is not found; generate short name |
2535 | ; file is not found; generate short name |
2492 | call fat_name_is_legal |
2536 | call fat_name_is_legal |
2493 | jc @f |
2537 | jc @f |
2494 | add esp, 36 |
2538 | add esp, 36 |
2495 | call fat_unlock |
2539 | call fat_unlock |
2496 | popad |
2540 | popad |
2497 | mov eax, ERROR_FILE_NOT_FOUND |
2541 | mov eax, ERROR_FILE_NOT_FOUND |
2498 | xor ebx, ebx |
2542 | xor ebx, ebx |
2499 | ret |
2543 | ret |
2500 | @@: |
2544 | @@: |
2501 | sub esp, 12 |
2545 | sub esp, 12 |
2502 | mov edi, esp |
2546 | mov edi, esp |
2503 | call fat_gen_short_name |
2547 | call fat_gen_short_name |
2504 | .test_short_name_loop: |
2548 | .test_short_name_loop: |
2505 | push esi edi ecx |
2549 | push esi edi ecx |
2506 | mov esi, edi |
2550 | mov esi, edi |
2507 | lea eax, [esp+12+12+8] |
2551 | lea eax, [esp+12+12+8] |
2508 | mov edx, [eax+24] |
2552 | mov edx, [eax+24] |
2509 | mov [eax], edx |
2553 | mov [eax], edx |
2510 | and dword [eax+4], 0 |
2554 | and dword [eax+4], 0 |
2511 | call dword [eax-4] |
2555 | call dword [eax-4] |
2512 | jc .found |
2556 | jc .found |
2513 | .test_short_name_entry: |
2557 | .test_short_name_entry: |
2514 | cmp byte [edi+11], 0xF |
2558 | cmp byte [edi+11], 0xF |
2515 | jz .test_short_name_cont |
2559 | jz .test_short_name_cont |
2516 | mov ecx, 11 |
2560 | mov ecx, 11 |
2517 | push esi edi |
2561 | push esi edi |
2518 | repz cmpsb |
2562 | repz cmpsb |
2519 | pop edi esi |
2563 | pop edi esi |
2520 | jz .short_name_found |
2564 | jz .short_name_found |
2521 | .test_short_name_cont: |
2565 | .test_short_name_cont: |
2522 | lea eax, [esp+12+12+8] |
2566 | lea eax, [esp+12+12+8] |
2523 | call dword [eax-8] |
2567 | call dword [eax-8] |
2524 | jnc .test_short_name_entry |
2568 | jnc .test_short_name_entry |
2525 | jmp .found |
2569 | jmp .found |
2526 | .short_name_found: |
2570 | .short_name_found: |
2527 | pop ecx edi esi |
2571 | pop ecx edi esi |
2528 | call fat_next_short_name |
2572 | call fat_next_short_name |
2529 | jnc .test_short_name_loop |
2573 | jnc .test_short_name_loop |
2530 | .disk_full: |
2574 | .disk_full: |
2531 | add esp, 12+36 |
2575 | add esp, 12+36 |
2532 | call fat_unlock |
2576 | call fat_unlock |
2533 | popa |
2577 | popa |
2534 | mov eax, ERROR_DISK_FULL |
2578 | mov eax, ERROR_DISK_FULL |
2535 | xor ebx, ebx |
2579 | xor ebx, ebx |
2536 | ret |
2580 | ret |
2537 | .found: |
2581 | .found: |
2538 | pop ecx edi esi |
2582 | pop ecx edi esi |
2539 | ; now find space in directory |
2583 | ; now find space in directory |
2540 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
2584 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
2541 | mov al, '~' |
2585 | mov al, '~' |
2542 | push ecx edi |
2586 | push ecx edi |
2543 | mov ecx, 8 |
2587 | mov ecx, 8 |
2544 | repnz scasb |
2588 | repnz scasb |
2545 | movi eax, 1 ; 1 entry |
2589 | movi eax, 1 ; 1 entry |
2546 | jnz .notilde |
2590 | jnz .notilde |
2547 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
2591 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
2548 | xor eax, eax |
2592 | xor eax, eax |
2549 | @@: |
2593 | @@: |
2550 | cmp byte [esi], 0 |
2594 | cmp byte [esi], 0 |
2551 | jz @f |
2595 | jz @f |
2552 | inc esi |
2596 | inc esi |
2553 | inc eax |
2597 | inc eax |
2554 | jmp @b |
2598 | jmp @b |
2555 | @@: |
2599 | @@: |
2556 | sub esi, eax |
2600 | sub esi, eax |
2557 | add eax, 12+13 |
2601 | add eax, 12+13 |
2558 | mov ecx, 13 |
2602 | mov ecx, 13 |
2559 | push edx |
2603 | push edx |
2560 | cdq |
2604 | cdq |
2561 | div ecx |
2605 | div ecx |
2562 | pop edx |
2606 | pop edx |
2563 | .notilde: |
2607 | .notilde: |
2564 | push -1 |
2608 | push -1 |
2565 | push -1 |
2609 | push -1 |
2566 | push -1 |
2610 | push -1 |
2567 | ; find |
2611 | ; find |
2568 | xor ecx, ecx |
2612 | xor ecx, ecx |
2569 | push eax |
2613 | push eax |
2570 | lea eax, [esp+16+8+12+8] |
2614 | lea eax, [esp+16+8+12+8] |
2571 | mov edx, [eax+24] |
2615 | mov edx, [eax+24] |
2572 | mov [eax], edx |
2616 | mov [eax], edx |
2573 | and dword [eax+4], 0 |
2617 | and dword [eax+4], 0 |
2574 | call dword [eax-4] |
2618 | call dword [eax-4] |
2575 | pop eax |
2619 | pop eax |
2576 | jnc .scan_dir |
2620 | jnc .scan_dir |
2577 | .fsfrfe3: |
2621 | .fsfrfe3: |
2578 | add esp, 12+8+12+36 |
2622 | add esp, 12+8+12+36 |
2579 | call fat_unlock |
2623 | call fat_unlock |
2580 | popad |
2624 | popad |
2581 | mov eax, ERROR_DEVICE |
2625 | mov eax, ERROR_DEVICE |
2582 | xor ebx, ebx |
2626 | xor ebx, ebx |
2583 | ret |
2627 | ret |
2584 | .scan_dir: |
2628 | .scan_dir: |
2585 | cmp byte [edi], 0 |
2629 | cmp byte [edi], 0 |
2586 | jz .free |
2630 | jz .free |
2587 | cmp byte [edi], 0xE5 |
2631 | cmp byte [edi], 0xE5 |
2588 | jz .free |
2632 | jz .free |
2589 | xor ecx, ecx |
2633 | xor ecx, ecx |
2590 | .scan_cont: |
2634 | .scan_cont: |
2591 | push eax |
2635 | push eax |
2592 | lea eax, [esp+16+8+12+8] |
2636 | lea eax, [esp+16+8+12+8] |
2593 | call dword [eax-8] |
2637 | call dword [eax-8] |
2594 | mov edx, eax |
2638 | mov edx, eax |
2595 | pop eax |
2639 | pop eax |
2596 | jnc .scan_dir |
2640 | jnc .scan_dir |
2597 | cmp edx, ERROR_DEVICE |
2641 | cmp edx, ERROR_DEVICE |
2598 | jz .fsfrfe3 |
2642 | jz .fsfrfe3 |
2599 | push eax |
2643 | push eax |
2600 | lea eax, [esp+16+8+12+8] |
2644 | lea eax, [esp+16+8+12+8] |
2601 | call dword [eax+20] ; extend directory |
2645 | call dword [eax+20] ; extend directory |
2602 | pop eax |
2646 | pop eax |
2603 | jnc .scan_dir |
2647 | jnc .scan_dir |
2604 | add esp, 12+8+12+36 |
2648 | add esp, 12+8+12+36 |
2605 | call fat_unlock |
2649 | call fat_unlock |
2606 | popad |
2650 | popad |
2607 | mov eax, ERROR_DISK_FULL |
2651 | mov eax, ERROR_DISK_FULL |
2608 | xor ebx, ebx |
2652 | xor ebx, ebx |
2609 | ret |
2653 | ret |
2610 | .free: |
2654 | .free: |
2611 | test ecx, ecx |
2655 | test ecx, ecx |
2612 | jnz @f |
2656 | jnz @f |
2613 | mov [esp], edi |
2657 | mov [esp], edi |
2614 | mov ecx, [esp+12+8+12+8] |
2658 | mov ecx, [esp+12+8+12+8] |
2615 | mov [esp+4], ecx |
2659 | mov [esp+4], ecx |
2616 | mov ecx, [esp+12+8+12+12] |
2660 | mov ecx, [esp+12+8+12+12] |
2617 | mov [esp+8], ecx |
2661 | mov [esp+8], ecx |
2618 | xor ecx, ecx |
2662 | xor ecx, ecx |
2619 | @@: |
2663 | @@: |
2620 | inc ecx |
2664 | inc ecx |
2621 | cmp ecx, eax |
2665 | cmp ecx, eax |
2622 | jb .scan_cont |
2666 | jb .scan_cont |
2623 | ; found! |
2667 | ; found! |
2624 | push esi ecx |
2668 | push esi ecx |
2625 | ; If creating a directory, allocate one data cluster now and fail immediately |
2669 | ; If creating a directory, allocate one data cluster now and fail immediately |
2626 | ; if this is impossible. This prevents from creating an invalid directory entry |
2670 | ; if this is impossible. This prevents from creating an invalid directory entry |
2627 | ; on a full disk. |
2671 | ; on a full disk. |
2628 | ; yup, the argument is quite non-intuitive... but what should I do if |
2672 | ; yup, the argument is quite non-intuitive... but what should I do if |
2629 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
2673 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
2630 | ; which in turn is filled with 0 in fat_Rewrite and 1 in fat_CreateFolder. |
2674 | ; which in turn is filled with 0 in fat_Rewrite and 1 in fat_CreateFolder. |
2631 | cmp byte [esp+8+12+8+12+36+28], 0 |
2675 | cmp byte [esp+8+12+8+12+36+28], 0 |
2632 | jz .no.preallocate.folder.data |
2676 | jz .no.preallocate.folder.data |
2633 | call get_free_FAT |
2677 | call get_free_FAT |
2634 | jnc @f |
2678 | jnc @f |
2635 | add esp, 8+12+8 |
2679 | add esp, 8+12+8 |
2636 | jmp .disk_full |
2680 | jmp .disk_full |
2637 | @@: |
2681 | @@: |
2638 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
2682 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
2639 | .no.preallocate.folder.data: |
2683 | .no.preallocate.folder.data: |
2640 | ; calculate name checksum |
2684 | ; calculate name checksum |
2641 | mov esi, [esp+8+12] |
2685 | mov esi, [esp+8+12] |
2642 | mov ecx, 11 |
2686 | mov ecx, 11 |
2643 | xor eax, eax |
2687 | xor eax, eax |
2644 | @@: |
2688 | @@: |
2645 | ror al, 1 |
2689 | ror al, 1 |
2646 | add al, [esi] |
2690 | add al, [esi] |
2647 | inc esi |
2691 | inc esi |
2648 | loop @b |
2692 | loop @b |
2649 | pop ecx esi |
2693 | pop ecx esi |
2650 | pop edi |
2694 | pop edi |
2651 | pop dword [esp+8+12+12] |
2695 | pop dword [esp+8+12+12] |
2652 | pop dword [esp+8+12+12] |
2696 | pop dword [esp+8+12+12] |
2653 | ; edi points to first entry in free chunk |
2697 | ; edi points to first entry in free chunk |
2654 | dec ecx |
2698 | dec ecx |
2655 | jz .nolfn |
2699 | jz .nolfn |
2656 | push esi |
2700 | push esi |
2657 | push eax |
2701 | push eax |
2658 | lea eax, [esp+8+8+12+8] |
2702 | lea eax, [esp+8+8+12+8] |
2659 | call dword [eax+8] ; begin write |
2703 | call dword [eax+8] ; begin write |
2660 | mov al, 40h |
2704 | mov al, 40h |
2661 | .writelfn: |
2705 | .writelfn: |
2662 | or al, cl |
2706 | or al, cl |
2663 | mov esi, [esp+4] |
2707 | mov esi, [esp+4] |
2664 | push ecx |
2708 | push ecx |
2665 | dec ecx |
2709 | dec ecx |
2666 | imul ecx, 13 |
2710 | imul ecx, 13 |
2667 | add esi, ecx |
2711 | add esi, ecx |
2668 | stosb |
2712 | stosb |
2669 | mov cl, 5 |
2713 | mov cl, 5 |
2670 | call fat_read_symbols |
2714 | call fat_read_symbols |
2671 | mov ax, 0xF |
2715 | mov ax, 0xF |
2672 | stosw |
2716 | stosw |
2673 | mov al, [esp+4] |
2717 | mov al, [esp+4] |
2674 | stosb |
2718 | stosb |
2675 | mov cl, 6 |
2719 | mov cl, 6 |
2676 | call fat_read_symbols |
2720 | call fat_read_symbols |
2677 | xor eax, eax |
2721 | xor eax, eax |
2678 | stosw |
2722 | stosw |
2679 | mov cl, 2 |
2723 | mov cl, 2 |
2680 | call fat_read_symbols |
2724 | call fat_read_symbols |
2681 | pop ecx |
2725 | pop ecx |
2682 | lea eax, [esp+8+8+12+8] |
2726 | lea eax, [esp+8+8+12+8] |
2683 | call dword [eax+12] ; next write |
2727 | call dword [eax+12] ; next write |
2684 | xor eax, eax |
2728 | xor eax, eax |
2685 | loop .writelfn |
2729 | loop .writelfn |
2686 | pop eax |
2730 | pop eax |
2687 | pop esi |
2731 | pop esi |
2688 | ; lea eax, [esp+8+12+8] |
2732 | ; lea eax, [esp+8+12+8] |
2689 | ; call dword [eax+16] ; end write |
2733 | ; call dword [eax+16] ; end write |
2690 | .nolfn: |
2734 | .nolfn: |
2691 | xchg esi, [esp] |
2735 | xchg esi, [esp] |
2692 | mov ecx, 11 |
2736 | mov ecx, 11 |
2693 | rep movsb |
2737 | rep movsb |
2694 | mov word [edi], 20h ; attributes |
2738 | mov word [edi], 20h ; attributes |
2695 | sub edi, 11 |
2739 | sub edi, 11 |
2696 | pop esi ecx |
2740 | pop esi ecx |
2697 | add esp, 12 |
2741 | add esp, 12 |
2698 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
2742 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
2699 | call get_time_for_file |
2743 | call get_time_for_file |
2700 | mov [edi+14], ax ; creation time |
2744 | mov [edi+14], ax ; creation time |
2701 | mov [edi+22], ax ; last write time |
2745 | mov [edi+22], ax ; last write time |
2702 | call get_date_for_file |
2746 | call get_date_for_file |
2703 | mov [edi+16], ax ; creation date |
2747 | mov [edi+16], ax ; creation date |
2704 | mov [edi+24], ax ; last write date |
2748 | mov [edi+24], ax ; last write date |
2705 | mov [edi+18], ax ; last access date |
2749 | mov [edi+18], ax ; last access date |
2706 | xor ecx, ecx |
2750 | xor ecx, ecx |
2707 | mov word [edi+20], cx ; high word of cluster |
2751 | mov word [edi+20], cx ; high word of cluster |
2708 | mov word [edi+26], cx ; low word of cluster - to be filled |
2752 | mov word [edi+26], cx ; low word of cluster - to be filled |
2709 | mov dword [edi+28], ecx ; file size - to be filled |
2753 | mov dword [edi+28], ecx ; file size - to be filled |
2710 | cmp byte [esp+36+28], cl |
2754 | cmp byte [esp+36+28], cl |
2711 | jz .doit |
2755 | jz .doit |
2712 | ; create directory |
2756 | ; create directory |
2713 | mov byte [edi+11], 10h ; attributes: folder |
2757 | mov byte [edi+11], 10h ; attributes: folder |
2714 | mov esi, edi |
2758 | mov esi, edi |
2715 | lea eax, [esp+8] |
2759 | lea eax, [esp+8] |
2716 | call dword [eax+16] ; flush directory |
2760 | call dword [eax+16] ; flush directory |
2717 | mov eax, [esp+36+20] ; extract saved cluster |
2761 | mov eax, [esp+36+20] ; extract saved cluster |
2718 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
2762 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
2719 | push ecx |
2763 | push ecx |
2720 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2764 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2721 | shl ecx, 9 |
2765 | shl ecx, 9 |
2722 | push ecx |
2766 | push ecx |
2723 | push edi |
2767 | push edi |
2724 | jmp .doit2 |
2768 | jmp .doit2 |
2725 | .doit: |
2769 | .doit: |
2726 | mov esi, [esp+36+20] |
2770 | mov esi, [esp+36+20] |
2727 | lea eax, [esp+8] |
2771 | lea eax, [esp+8] |
2728 | call dword [eax+16] ; flush directory |
2772 | call dword [eax+16] ; flush directory |
2729 | push ecx |
2773 | push ecx |
2730 | mov ecx, [esp+4+36+24] |
2774 | mov ecx, [esp+4+36+24] |
2731 | push ecx |
2775 | push ecx |
2732 | push edi |
2776 | push edi |
2733 | test ecx, ecx |
2777 | test ecx, ecx |
2734 | jz .done |
2778 | jz .done |
2735 | call get_free_FAT |
2779 | call get_free_FAT |
2736 | jc .diskfull |
2780 | jc .diskfull |
2737 | .doit2: |
2781 | .doit2: |
2738 | push eax |
2782 | push eax |
2739 | mov [edi+26], ax |
2783 | mov [edi+26], ax |
2740 | shr eax, 16 |
2784 | shr eax, 16 |
2741 | mov [edi+20], ax |
2785 | mov [edi+20], ax |
2742 | lea eax, [esp+16+8] |
2786 | lea eax, [esp+16+8] |
2743 | call dword [eax+16] ; flush directory |
2787 | call dword [eax+16] ; flush directory |
2744 | pop eax |
2788 | pop eax |
2745 | push edx |
2789 | push edx |
2746 | mov edx, [ebp+FAT.fatEND] |
2790 | mov edx, [ebp+FAT.fatEND] |
2747 | call set_FAT |
2791 | call set_FAT |
2748 | pop edx |
2792 | pop edx |
2749 | .write_cluster: |
2793 | .write_cluster: |
2750 | push eax |
2794 | push eax |
2751 | dec eax |
2795 | dec eax |
2752 | dec eax |
2796 | dec eax |
2753 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2797 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2754 | add eax, [ebp+FAT.DATA_START] |
2798 | add eax, [ebp+FAT.DATA_START] |
2755 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
2799 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
2756 | ; write data |
2800 | ; write data |
2757 | .write_sector: |
2801 | .write_sector: |
2758 | cmp byte [esp+20+36+28], 0 |
2802 | cmp byte [esp+20+36+28], 0 |
2759 | jnz .writedir |
2803 | jnz .writedir |
2760 | mov ecx, 512 |
2804 | mov ecx, 512 |
2761 | cmp dword [esp+12], ecx |
2805 | cmp dword [esp+12], ecx |
2762 | jb .writeshort |
2806 | jb .writeshort |
2763 | ; we can write directly from given buffer |
2807 | ; we can write directly from given buffer |
2764 | mov ebx, esi |
2808 | mov ebx, esi |
2765 | add esi, ecx |
2809 | add esi, ecx |
2766 | jmp .writecommon |
2810 | jmp .writecommon |
2767 | .writeshort: |
2811 | .writeshort: |
2768 | mov ecx, [esp+12] |
2812 | mov ecx, [esp+12] |
2769 | push ecx |
2813 | push ecx |
2770 | lea edi, [ebp+FAT.buffer] |
2814 | lea edi, [ebp+FAT.buffer] |
2771 | mov ebx, edi |
2815 | mov ebx, edi |
2772 | rep movsb |
2816 | rep movsb |
2773 | .writedircont: |
2817 | .writedircont: |
2774 | lea ecx, [ebp+FAT.buffer+0x200] |
2818 | lea ecx, [ebp+FAT.buffer+0x200] |
2775 | sub ecx, edi |
2819 | sub ecx, edi |
2776 | push eax |
2820 | push eax |
2777 | xor eax, eax |
2821 | xor eax, eax |
2778 | rep stosb |
2822 | rep stosb |
2779 | pop eax |
2823 | pop eax |
2780 | pop ecx |
2824 | pop ecx |
2781 | .writecommon: |
2825 | .writecommon: |
2782 | push eax |
2826 | push eax |
2783 | call fs_write32_app |
2827 | call fs_write32_app |
2784 | test eax, eax |
2828 | test eax, eax |
2785 | pop eax |
2829 | pop eax |
2786 | jnz .writeerr |
2830 | jnz .writeerr |
2787 | inc eax |
2831 | inc eax |
2788 | sub dword [esp+12], ecx |
2832 | sub dword [esp+12], ecx |
2789 | jz .writedone |
2833 | jz .writedone |
2790 | dec dword [esp] |
2834 | dec dword [esp] |
2791 | jnz .write_sector |
2835 | jnz .write_sector |
2792 | pop eax |
2836 | pop eax |
2793 | ; allocate new cluster |
2837 | ; allocate new cluster |
2794 | pop eax |
2838 | pop eax |
2795 | mov ecx, eax |
2839 | mov ecx, eax |
2796 | call get_free_FAT |
2840 | call get_free_FAT |
2797 | jc .diskfull |
2841 | jc .diskfull |
2798 | push edx |
2842 | push edx |
2799 | mov edx, [ebp+FAT.fatEND] |
2843 | mov edx, [ebp+FAT.fatEND] |
2800 | call set_FAT |
2844 | call set_FAT |
2801 | xchg eax, ecx |
2845 | xchg eax, ecx |
2802 | mov edx, ecx |
2846 | mov edx, ecx |
2803 | call set_FAT |
2847 | call set_FAT |
2804 | pop edx |
2848 | pop edx |
2805 | xchg eax, ecx |
2849 | xchg eax, ecx |
2806 | jmp .write_cluster |
2850 | jmp .write_cluster |
2807 | .diskfull: |
2851 | .diskfull: |
2808 | mov eax, ERROR_DISK_FULL |
2852 | mov eax, ERROR_DISK_FULL |
2809 | jmp .ret |
2853 | jmp .ret |
2810 | .writeerr: |
2854 | .writeerr: |
2811 | pop eax eax |
2855 | pop eax eax |
2812 | sub esi, ecx |
2856 | sub esi, ecx |
2813 | mov eax, ERROR_DEVICE |
2857 | mov eax, ERROR_DEVICE |
2814 | jmp .ret |
2858 | jmp .ret |
2815 | .writedone: |
2859 | .writedone: |
2816 | pop eax eax |
2860 | pop eax eax |
2817 | .done: |
2861 | .done: |
2818 | xor eax, eax |
2862 | xor eax, eax |
2819 | .ret: |
2863 | .ret: |
2820 | pop edi ecx |
2864 | pop edi ecx |
2821 | sub esi, [esp+4+36+20] |
2865 | sub esi, [esp+4+36+20] |
2822 | mov [esp+4+36+28], eax |
2866 | mov [esp+4+36+28], eax |
2823 | mov [esp+4+36+16], esi |
2867 | mov [esp+4+36+16], esi |
2824 | lea eax, [esp+12] |
2868 | lea eax, [esp+12] |
2825 | call dword [eax+8] |
2869 | call dword [eax+8] |
2826 | mov [edi+28], esi |
2870 | mov [edi+28], esi |
2827 | call dword [eax+16] |
2871 | call dword [eax+16] |
2828 | mov [esp+36+16], ebx |
2872 | mov [esp+36+16], ebx |
2829 | lea eax, [esi+511] |
2873 | lea eax, [esi+511] |
2830 | shr eax, 9 |
2874 | shr eax, 9 |
2831 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2875 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2832 | lea eax, [eax+ecx-1] |
2876 | lea eax, [eax+ecx-1] |
2833 | xor edx, edx |
2877 | xor edx, edx |
2834 | div ecx |
2878 | div ecx |
2835 | pop ecx |
2879 | pop ecx |
2836 | sub ecx, eax |
2880 | sub ecx, eax |
2837 | call add_disk_free_space |
2881 | call add_disk_free_space |
2838 | add esp, 36 |
2882 | add esp, 36 |
2839 | call update_disk |
2883 | call update_disk |
2840 | call fat_unlock |
2884 | call fat_unlock |
2841 | popad |
2885 | popad |
2842 | ret |
2886 | ret |
2843 | .writedir: |
2887 | .writedir: |
2844 | push 512 |
2888 | push 512 |
2845 | lea edi, [ebp+FAT.buffer] |
2889 | lea edi, [ebp+FAT.buffer] |
2846 | mov ebx, edi |
2890 | mov ebx, edi |
2847 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2891 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2848 | shl ecx, 9 |
2892 | shl ecx, 9 |
2849 | cmp ecx, [esp+16] |
2893 | cmp ecx, [esp+16] |
2850 | jnz .writedircont |
2894 | jnz .writedircont |
2851 | dec dword [esp+20] |
2895 | dec dword [esp+20] |
2852 | push esi |
2896 | push esi |
2853 | mov ecx, 32/4 |
2897 | mov ecx, 32/4 |
2854 | rep movsd |
2898 | rep movsd |
2855 | pop esi |
2899 | pop esi |
2856 | mov dword [edi-32], '. ' |
2900 | mov dword [edi-32], '. ' |
2857 | mov dword [edi-32+4], ' ' |
2901 | mov dword [edi-32+4], ' ' |
2858 | mov dword [edi-32+8], ' ' |
2902 | mov dword [edi-32+8], ' ' |
2859 | mov byte [edi-32+11], 10h |
2903 | mov byte [edi-32+11], 10h |
2860 | push esi |
2904 | push esi |
2861 | mov ecx, 32/4 |
2905 | mov ecx, 32/4 |
2862 | rep movsd |
2906 | rep movsd |
2863 | pop esi |
2907 | pop esi |
2864 | mov dword [edi-32], '.. ' |
2908 | mov dword [edi-32], '.. ' |
2865 | mov dword [edi-32+4], ' ' |
2909 | mov dword [edi-32+4], ' ' |
2866 | mov dword [edi-32+8], ' ' |
2910 | mov dword [edi-32+8], ' ' |
2867 | mov byte [edi-32+11], 10h |
2911 | mov byte [edi-32+11], 10h |
2868 | mov ecx, [esp+20+36] |
2912 | mov ecx, [esp+20+36] |
2869 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
2913 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
2870 | jnz @f |
2914 | jnz @f |
2871 | xor ecx, ecx |
2915 | xor ecx, ecx |
2872 | @@: |
2916 | @@: |
2873 | mov word [edi-32+26], cx |
2917 | mov word [edi-32+26], cx |
2874 | shr ecx, 16 |
2918 | shr ecx, 16 |
2875 | mov [edi-32+20], cx |
2919 | mov [edi-32+20], cx |
2876 | jmp .writedircont |
2920 | jmp .writedircont |
2877 | 2921 | ||
2878 | fat_read_symbol: |
2922 | fat_read_symbol: |
2879 | or ax, -1 |
2923 | or ax, -1 |
2880 | test esi, esi |
2924 | test esi, esi |
2881 | jz .retFFFF |
2925 | jz .retFFFF |
2882 | lodsb |
2926 | lodsb |
2883 | test al, al |
2927 | test al, al |
2884 | jnz ansi2uni_char |
2928 | jnz ansi2uni_char |
2885 | xor eax, eax |
2929 | xor eax, eax |
2886 | xor esi, esi |
2930 | xor esi, esi |
2887 | .retFFFF: |
2931 | .retFFFF: |
2888 | ret |
2932 | ret |
2889 | 2933 | ||
2890 | fat_read_symbols: |
2934 | fat_read_symbols: |
2891 | call fat_read_symbol |
2935 | call fat_read_symbol |
2892 | stosw |
2936 | stosw |
2893 | loop fat_read_symbols |
2937 | loop fat_read_symbols |
2894 | ret |
2938 | ret |
2895 | 2939 | ||
2896 | 2940 | ||
2897 | fat_Write.access_denied: |
2941 | fat_Write.access_denied: |
2898 | push ERROR_ACCESS_DENIED |
2942 | push ERROR_ACCESS_DENIED |
2899 | fat_Write.ret0: |
2943 | fat_Write.ret0: |
2900 | pop eax |
2944 | pop eax |
2901 | xor ebx, ebx |
2945 | xor ebx, ebx |
2902 | ret |
2946 | ret |
2903 | 2947 | ||
2904 | fat_Write.ret11: |
2948 | fat_Write.ret11: |
2905 | push ERROR_DEVICE |
2949 | push ERROR_DEVICE |
2906 | jmp fat_Write.ret0 |
2950 | jmp fat_Write.ret0 |
2907 | 2951 | ||
2908 | ;---------------------------------------------------------------- |
2952 | ;---------------------------------------------------------------- |
2909 | ; fat_Write - FAT implementation of writing to file |
2953 | ; fat_Write - FAT implementation of writing to file |
2910 | ; in: ebp = pointer to FAT structure |
2954 | ; in: ebp = pointer to FAT structure |
2911 | ; in: esi+[esp+4] = name |
2955 | ; in: esi+[esp+4] = name |
2912 | ; in: ebx = pointer to parameters from sysfunc 70 |
2956 | ; in: ebx = pointer to parameters from sysfunc 70 |
2913 | ; out: eax, ebx = return values for sysfunc 70 |
2957 | ; out: eax, ebx = return values for sysfunc 70 |
2914 | ;---------------------------------------------------------------- |
2958 | ;---------------------------------------------------------------- |
2915 | fat_Write: |
2959 | fat_Write: |
2916 | cmp byte [esi], 0 |
2960 | cmp byte [esi], 0 |
2917 | jz .access_denied |
2961 | jz .access_denied |
2918 | call fat_lock |
2962 | call fat_lock |
2919 | push edi |
2963 | push edi |
2920 | stdcall hd_find_lfn, [esp+4+4] |
2964 | stdcall hd_find_lfn, [esp+4+4] |
2921 | jnc .found |
2965 | jnc .found |
2922 | pop edi |
2966 | pop edi |
2923 | push eax |
2967 | push eax |
2924 | call fat_unlock |
2968 | call fat_unlock |
2925 | jmp .ret0 |
2969 | jmp .ret0 |
2926 | .found: |
2970 | .found: |
2927 | ; FAT does not support files larger than 4GB |
2971 | ; FAT does not support files larger than 4GB |
2928 | cmp dword [ebx+8], 0 |
2972 | cmp dword [ebx+8], 0 |
2929 | jz @f |
2973 | jz @f |
2930 | .eof: |
2974 | .eof: |
2931 | pop edi |
2975 | pop edi |
2932 | push ERROR_END_OF_FILE |
2976 | push ERROR_END_OF_FILE |
2933 | call fat_unlock |
2977 | call fat_unlock |
2934 | jmp .ret0 |
2978 | jmp .ret0 |
2935 | @@: |
2979 | @@: |
2936 | mov ecx, [ebx+12] |
2980 | mov ecx, [ebx+12] |
2937 | mov edx, [ebx+16] |
2981 | mov edx, [ebx+16] |
2938 | mov ebx, [ebx+4] |
2982 | mov ebx, [ebx+4] |
2939 | ; now edi points to direntry, ebx=start byte to write, |
2983 | ; now edi points to direntry, ebx=start byte to write, |
2940 | ; ecx=number of bytes to write, edx=data pointer |
2984 | ; ecx=number of bytes to write, edx=data pointer |
2941 | 2985 | ||
2942 | ; extend file if needed |
2986 | ; extend file if needed |
2943 | add ecx, ebx |
2987 | add ecx, ebx |
2944 | jc .eof ; FAT does not support files larger than 4GB |
2988 | jc .eof ; FAT does not support files larger than 4GB |
2945 | push edx |
2989 | push edx |
2946 | push eax ; save directory sector |
2990 | push eax ; save directory sector |
2947 | push 0 ; return value=0 |
2991 | push 0 ; return value=0 |
2948 | 2992 | ||
2949 | call get_time_for_file |
2993 | call get_time_for_file |
2950 | mov [edi+22], ax ; last write time |
2994 | mov [edi+22], ax ; last write time |
2951 | call get_date_for_file |
2995 | call get_date_for_file |
2952 | mov [edi+24], ax ; last write date |
2996 | mov [edi+24], ax ; last write date |
2953 | mov [edi+18], ax ; last access date |
2997 | mov [edi+18], ax ; last access date |
2954 | 2998 | ||
2955 | push dword [edi+28] ; save current file size |
2999 | push dword [edi+28] ; save current file size |
2956 | cmp ecx, [edi+28] |
3000 | cmp ecx, [edi+28] |
2957 | jbe .length_ok |
3001 | jbe .length_ok |
2958 | cmp ecx, ebx |
3002 | cmp ecx, ebx |
2959 | jz .length_ok |
3003 | jz .length_ok |
2960 | call hd_extend_file |
3004 | call hd_extend_file |
2961 | jnc .length_ok |
3005 | jnc .length_ok |
2962 | mov [esp+4], eax |
3006 | mov [esp+4], eax |
2963 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
3007 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
2964 | ; First two cases are fatal errors, in third case we may write some data |
3008 | ; First two cases are fatal errors, in third case we may write some data |
2965 | cmp al, ERROR_DISK_FULL |
3009 | cmp al, ERROR_DISK_FULL |
2966 | jz .disk_full |
3010 | jz .disk_full |
2967 | call fat_unlock |
3011 | call fat_unlock |
2968 | pop eax |
3012 | pop eax |
2969 | pop eax |
3013 | pop eax |
2970 | pop ecx |
3014 | pop ecx |
2971 | pop edx |
3015 | pop edx |
2972 | pop edi |
3016 | pop edi |
2973 | xor ebx, ebx |
3017 | xor ebx, ebx |
2974 | ret |
3018 | ret |
2975 | .disk_full: |
3019 | .disk_full: |
2976 | ; correct number of bytes to write |
3020 | ; correct number of bytes to write |
2977 | mov ecx, [edi+28] |
3021 | mov ecx, [edi+28] |
2978 | cmp ecx, ebx |
3022 | cmp ecx, ebx |
2979 | ja .length_ok |
3023 | ja .length_ok |
2980 | push 0 |
3024 | push 0 |
2981 | .ret: |
3025 | .ret: |
2982 | pop eax |
3026 | pop eax |
2983 | sub edx, [esp+12] |
3027 | sub edx, [esp+12] |
2984 | mov ebx, edx ; ebx=number of written bytes |
3028 | mov ebx, edx ; ebx=number of written bytes |
2985 | call update_disk |
3029 | call update_disk |
2986 | test eax, eax |
3030 | test eax, eax |
2987 | jz @f |
3031 | jz @f |
2988 | mov byte [esp+4], ERROR_DEVICE |
3032 | mov byte [esp+4], ERROR_DEVICE |
2989 | @@: |
3033 | @@: |
2990 | call fat_unlock |
3034 | call fat_unlock |
2991 | pop eax |
3035 | pop eax |
2992 | pop eax |
3036 | pop eax |
2993 | pop ecx |
3037 | pop ecx |
2994 | pop edx |
3038 | pop edx |
2995 | pop edi |
3039 | pop edi |
2996 | ret |
3040 | ret |
2997 | .length_ok: |
3041 | .length_ok: |
2998 | mov esi, [edi+28] |
3042 | mov esi, [edi+28] |
2999 | mov eax, [edi+20-2] |
3043 | mov eax, [edi+20-2] |
3000 | mov ax, [edi+26] |
3044 | mov ax, [edi+26] |
3001 | mov edi, eax ; edi=current cluster |
3045 | mov edi, eax ; edi=current cluster |
3002 | push 0 ; current sector in cluster |
3046 | push 0 ; current sector in cluster |
3003 | ; save directory |
3047 | ; save directory |
3004 | mov eax, [esp+12] |
3048 | mov eax, [esp+12] |
3005 | push ebx |
3049 | push ebx |
3006 | lea ebx, [ebp+FAT.buffer] |
3050 | lea ebx, [ebp+FAT.buffer] |
3007 | call fs_write32_sys |
3051 | call fs_write32_sys |
3008 | pop ebx |
3052 | pop ebx |
3009 | test eax, eax |
3053 | test eax, eax |
3010 | jz @f |
3054 | jz @f |
3011 | .device_err: |
3055 | .device_err: |
3012 | mov byte [esp+8], ERROR_DEVICE |
3056 | mov byte [esp+8], ERROR_DEVICE |
3013 | jmp .ret |
3057 | jmp .ret |
3014 | .fat_err: |
3058 | .fat_err: |
3015 | mov byte [esp+8], ERROR_FAT_TABLE |
3059 | mov byte [esp+8], ERROR_FAT_TABLE |
3016 | jmp .ret |
3060 | jmp .ret |
3017 | @@: |
3061 | @@: |
3018 | 3062 | ||
3019 | ; now ebx=start pos, ecx=end pos, both lie inside file |
3063 | ; now ebx=start pos, ecx=end pos, both lie inside file |
3020 | sub ecx, ebx |
3064 | sub ecx, ebx |
3021 | jz .ret |
3065 | jz .ret |
3022 | .write_loop: |
3066 | .write_loop: |
3023 | ; skip unmodified sectors |
3067 | ; skip unmodified sectors |
3024 | cmp dword [esp+4], 0x200 |
3068 | cmp dword [esp+4], 0x200 |
3025 | jb .modify |
3069 | jb .modify |
3026 | sub ebx, 0x200 |
3070 | sub ebx, 0x200 |
3027 | jae .skip |
3071 | jae .skip |
3028 | add ebx, 0x200 |
3072 | add ebx, 0x200 |
3029 | .modify: |
3073 | .modify: |
3030 | ; get length of data in current sector |
3074 | ; get length of data in current sector |
3031 | push ecx |
3075 | push ecx |
3032 | sub ebx, 0x200 |
3076 | sub ebx, 0x200 |
3033 | jb .hasdata |
3077 | jb .hasdata |
3034 | neg ebx |
3078 | neg ebx |
3035 | xor ecx, ecx |
3079 | xor ecx, ecx |
3036 | jmp @f |
3080 | jmp @f |
3037 | .hasdata: |
3081 | .hasdata: |
3038 | neg ebx |
3082 | neg ebx |
3039 | cmp ecx, ebx |
3083 | cmp ecx, ebx |
3040 | jbe @f |
3084 | jbe @f |
3041 | mov ecx, ebx |
3085 | mov ecx, ebx |
3042 | @@: |
3086 | @@: |
3043 | ; get current sector number |
3087 | ; get current sector number |
3044 | mov eax, edi |
3088 | mov eax, edi |
3045 | dec eax |
3089 | dec eax |
3046 | dec eax |
3090 | dec eax |
3047 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3091 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3048 | add eax, [ebp+FAT.DATA_START] |
3092 | add eax, [ebp+FAT.DATA_START] |
3049 | add eax, [esp+4] |
3093 | add eax, [esp+4] |
3050 | ; load sector if needed |
3094 | ; load sector if needed |
3051 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
3095 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
3052 | jz .noread |
3096 | jz .noread |
3053 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
3097 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
3054 | jz .noread |
3098 | jz .noread |
3055 | cmp ecx, esi ; (same for the last sector) |
3099 | cmp ecx, esi ; (same for the last sector) |
3056 | jz .noread |
3100 | jz .noread |
3057 | push eax ebx |
3101 | push eax ebx |
3058 | lea ebx, [ebp+FAT.buffer] |
3102 | lea ebx, [ebp+FAT.buffer] |
3059 | call fs_read32_app |
3103 | call fs_read32_app |
3060 | test eax, eax |
3104 | test eax, eax |
3061 | pop ebx eax |
3105 | pop ebx eax |
3062 | jz @f |
3106 | jz @f |
3063 | .device_err2: |
3107 | .device_err2: |
3064 | pop ecx |
3108 | pop ecx |
3065 | jmp .device_err |
3109 | jmp .device_err |
3066 | @@: |
3110 | @@: |
3067 | .noread: |
3111 | .noread: |
3068 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
3112 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
3069 | push eax ecx edi |
3113 | push eax ecx edi |
3070 | xor eax, eax |
3114 | xor eax, eax |
3071 | mov ecx, 0x200 |
3115 | mov ecx, 0x200 |
3072 | sub ecx, [esp+8+12] |
3116 | sub ecx, [esp+8+12] |
3073 | jbe @f |
3117 | jbe @f |
3074 | lea edi, [ebp+FAT.buffer] |
3118 | lea edi, [ebp+FAT.buffer] |
3075 | add edi, [esp+8+12] |
3119 | add edi, [esp+8+12] |
3076 | rep stosb |
3120 | rep stosb |
3077 | @@: |
3121 | @@: |
3078 | ; zero uninitialized data in the last sector |
3122 | ; zero uninitialized data in the last sector |
3079 | mov ecx, 0x200 |
3123 | mov ecx, 0x200 |
3080 | sub ecx, esi |
3124 | sub ecx, esi |
3081 | jbe @f |
3125 | jbe @f |
3082 | lea edi, [ebp+FAT.buffer+esi] |
3126 | lea edi, [ebp+FAT.buffer+esi] |
3083 | rep stosb |
3127 | rep stosb |
3084 | @@: |
3128 | @@: |
3085 | pop edi ecx |
3129 | pop edi ecx |
3086 | ; copy new data |
3130 | ; copy new data |
3087 | mov eax, edx |
3131 | mov eax, edx |
3088 | neg ebx |
3132 | neg ebx |
3089 | jecxz @f |
3133 | jecxz @f |
3090 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
3134 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
3091 | call memmove |
3135 | call memmove |
3092 | xor ebx, ebx |
3136 | xor ebx, ebx |
3093 | @@: |
3137 | @@: |
3094 | pop eax |
3138 | pop eax |
3095 | ; save sector |
3139 | ; save sector |
3096 | push ebx |
3140 | push ebx |
3097 | lea ebx, [ebp+FAT.buffer] |
3141 | lea ebx, [ebp+FAT.buffer] |
3098 | call fs_write32_app |
3142 | call fs_write32_app |
3099 | pop ebx |
3143 | pop ebx |
3100 | test eax, eax |
3144 | test eax, eax |
3101 | jnz .device_err2 |
3145 | jnz .device_err2 |
3102 | add edx, ecx |
3146 | add edx, ecx |
3103 | sub [esp], ecx |
3147 | sub [esp], ecx |
3104 | pop ecx |
3148 | pop ecx |
3105 | jz .ret |
3149 | jz .ret |
3106 | .skip: |
3150 | .skip: |
3107 | ; next sector |
3151 | ; next sector |
3108 | pop eax |
3152 | pop eax |
3109 | inc eax |
3153 | inc eax |
3110 | push eax |
3154 | push eax |
3111 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3155 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3112 | jb @f |
3156 | jb @f |
3113 | and dword [esp], 0 |
3157 | and dword [esp], 0 |
3114 | mov eax, edi |
3158 | mov eax, edi |
3115 | call get_FAT |
3159 | call get_FAT |
3116 | mov edi, eax |
3160 | mov edi, eax |
3117 | jc .device_err |
3161 | jc .device_err |
3118 | cmp edi, 2 |
3162 | cmp edi, 2 |
3119 | jb .fat_err |
3163 | jb .fat_err |
3120 | cmp edi, [ebp+FAT.fatRESERVED] |
3164 | cmp edi, [ebp+FAT.fatRESERVED] |
3121 | jae .fat_err |
3165 | jae .fat_err |
3122 | @@: |
3166 | @@: |
3123 | sub esi, 0x200 |
3167 | sub esi, 0x200 |
3124 | jae @f |
3168 | jae @f |
3125 | xor esi, esi |
3169 | xor esi, esi |
3126 | @@: |
3170 | @@: |
3127 | sub dword [esp+4], 0x200 |
3171 | sub dword [esp+4], 0x200 |
3128 | jae @f |
3172 | jae @f |
3129 | and dword [esp+4], 0 |
3173 | and dword [esp+4], 0 |
3130 | @@: |
3174 | @@: |
3131 | jmp .write_loop |
3175 | jmp .write_loop |
3132 | 3176 | ||
3133 | hd_extend_file.zero_size: |
3177 | hd_extend_file.zero_size: |
3134 | xor eax, eax |
3178 | xor eax, eax |
3135 | jmp hd_extend_file.start_extend |
3179 | jmp hd_extend_file.start_extend |
3136 | 3180 | ||
3137 | ; extends file on hd to given size (new data area is undefined) |
3181 | ; extends file on hd to given size (new data area is undefined) |
3138 | ; in: edi->direntry, ecx=new size |
3182 | ; in: edi->direntry, ecx=new size |
3139 | ; out: CF=0 => OK, eax=0 |
3183 | ; out: CF=0 => OK, eax=0 |
3140 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or ERROR_DEVICE) |
3184 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or ERROR_DEVICE) |
3141 | hd_extend_file: |
3185 | hd_extend_file: |
3142 | push esi |
3186 | push esi |
3143 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
3187 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
3144 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
3188 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
3145 | push ecx |
3189 | push ecx |
3146 | ; find the last cluster of file |
3190 | ; find the last cluster of file |
3147 | mov eax, [edi+20-2] |
3191 | mov eax, [edi+20-2] |
3148 | mov ax, [edi+26] |
3192 | mov ax, [edi+26] |
3149 | mov ecx, [edi+28] |
3193 | mov ecx, [edi+28] |
3150 | jecxz .zero_size |
3194 | jecxz .zero_size |
3151 | .last_loop: |
3195 | .last_loop: |
3152 | sub ecx, esi |
3196 | sub ecx, esi |
3153 | jbe .last_found |
3197 | jbe .last_found |
3154 | call get_FAT |
3198 | call get_FAT |
3155 | jnc @f |
3199 | jnc @f |
3156 | .device_err: |
3200 | .device_err: |
3157 | pop ecx |
3201 | pop ecx |
3158 | .device_err2: |
3202 | .device_err2: |
3159 | pop esi |
3203 | pop esi |
3160 | push ERROR_DEVICE |
3204 | push ERROR_DEVICE |
3161 | .ret_err: |
3205 | .ret_err: |
3162 | pop eax |
3206 | pop eax |
3163 | stc |
3207 | stc |
3164 | ret |
3208 | ret |
3165 | @@: |
3209 | @@: |
3166 | cmp eax, 2 |
3210 | cmp eax, 2 |
3167 | jb .fat_err |
3211 | jb .fat_err |
3168 | cmp eax, [ebp+FAT.fatRESERVED] |
3212 | cmp eax, [ebp+FAT.fatRESERVED] |
3169 | jb .last_loop |
3213 | jb .last_loop |
3170 | .fat_err: |
3214 | .fat_err: |
3171 | pop ecx esi |
3215 | pop ecx esi |
3172 | push ERROR_FAT_TABLE |
3216 | push ERROR_FAT_TABLE |
3173 | jmp .ret_err |
3217 | jmp .ret_err |
3174 | .last_found: |
3218 | .last_found: |
3175 | push eax |
3219 | push eax |
3176 | call get_FAT |
3220 | call get_FAT |
3177 | jnc @f |
3221 | jnc @f |
3178 | pop eax |
3222 | pop eax |
3179 | jmp .device_err |
3223 | jmp .device_err |
3180 | @@: |
3224 | @@: |
3181 | cmp eax, [ebp+FAT.fatRESERVED] |
3225 | cmp eax, [ebp+FAT.fatRESERVED] |
3182 | pop eax |
3226 | pop eax |
3183 | jb .fat_err |
3227 | jb .fat_err |
3184 | ; set length to full number of clusters |
3228 | ; set length to full number of clusters |
3185 | sub [edi+28], ecx |
3229 | sub [edi+28], ecx |
3186 | .start_extend: |
3230 | .start_extend: |
3187 | pop ecx |
3231 | pop ecx |
3188 | ; now do extend |
3232 | ; now do extend |
3189 | push edx |
3233 | push edx |
3190 | mov edx, 2 ; start scan from cluster 2 |
3234 | mov edx, 2 ; start scan from cluster 2 |
3191 | .extend_loop: |
3235 | .extend_loop: |
3192 | cmp [edi+28], ecx |
3236 | cmp [edi+28], ecx |
3193 | jae .extend_done |
3237 | jae .extend_done |
3194 | ; add new cluster |
3238 | ; add new cluster |
3195 | push eax |
3239 | push eax |
3196 | call get_free_FAT |
3240 | call get_free_FAT |
3197 | jc .disk_full |
3241 | jc .disk_full |
3198 | mov edx, [ebp+FAT.fatEND] |
3242 | mov edx, [ebp+FAT.fatEND] |
3199 | call set_FAT |
3243 | call set_FAT |
3200 | mov edx, eax |
3244 | mov edx, eax |
3201 | pop eax |
3245 | pop eax |
3202 | test eax, eax |
3246 | test eax, eax |
3203 | jz .first_cluster |
3247 | jz .first_cluster |
3204 | push edx |
3248 | push edx |
3205 | call set_FAT |
3249 | call set_FAT |
3206 | pop edx |
3250 | pop edx |
3207 | jmp @f |
3251 | jmp @f |
3208 | .first_cluster: |
3252 | .first_cluster: |
3209 | ror edx, 16 |
3253 | ror edx, 16 |
3210 | mov [edi+20], dx |
3254 | mov [edi+20], dx |
3211 | ror edx, 16 |
3255 | ror edx, 16 |
3212 | mov [edi+26], dx |
3256 | mov [edi+26], dx |
3213 | @@: |
3257 | @@: |
3214 | push ecx |
3258 | push ecx |
3215 | mov ecx, -1 |
3259 | mov ecx, -1 |
3216 | call add_disk_free_space |
3260 | call add_disk_free_space |
3217 | pop ecx |
3261 | pop ecx |
3218 | mov eax, edx |
3262 | mov eax, edx |
3219 | add [edi+28], esi |
3263 | add [edi+28], esi |
3220 | jmp .extend_loop |
3264 | jmp .extend_loop |
3221 | .extend_done: |
3265 | .extend_done: |
3222 | mov [edi+28], ecx |
3266 | mov [edi+28], ecx |
3223 | pop edx esi |
3267 | pop edx esi |
3224 | xor eax, eax ; CF=0 |
3268 | xor eax, eax ; CF=0 |
3225 | ret |
3269 | ret |
3226 | .device_err3: |
3270 | .device_err3: |
3227 | pop edx |
3271 | pop edx |
3228 | jmp .device_err2 |
3272 | jmp .device_err2 |
3229 | .disk_full: |
3273 | .disk_full: |
3230 | pop eax edx esi |
3274 | pop eax edx esi |
3231 | movi eax, ERROR_DISK_FULL |
3275 | movi eax, ERROR_DISK_FULL |
3232 | stc |
3276 | stc |
3233 | ret |
3277 | ret |
3234 | 3278 | ||
3235 | fat_update_datetime: |
3279 | fat_update_datetime: |
3236 | call get_time_for_file |
3280 | call get_time_for_file |
3237 | mov [edi+22], ax ; last write time |
3281 | mov [edi+22], ax ; last write time |
3238 | call get_date_for_file |
3282 | call get_date_for_file |
3239 | mov [edi+24], ax ; last write date |
3283 | mov [edi+24], ax ; last write date |
3240 | mov [edi+18], ax ; last access date |
3284 | mov [edi+18], ax ; last access date |
3241 | ret |
3285 | ret |
3242 | 3286 | ||
3243 | 3287 | ||
3244 | ;---------------------------------------------------------------- |
3288 | ;---------------------------------------------------------------- |
3245 | ; fat_SetFileEnd - FAT implementation of setting end-of-file |
3289 | ; fat_SetFileEnd - FAT implementation of setting end-of-file |
3246 | ; in: ebp = pointer to FAT structure |
3290 | ; in: ebp = pointer to FAT structure |
3247 | ; in: esi+[esp+4] = name |
3291 | ; in: esi+[esp+4] = name |
3248 | ; in: ebx = pointer to parameters from sysfunc 70 |
3292 | ; in: ebx = pointer to parameters from sysfunc 70 |
3249 | ; out: eax, ebx = return values for sysfunc 70 |
3293 | ; out: eax, ebx = return values for sysfunc 70 |
3250 | ;---------------------------------------------------------------- |
3294 | ;---------------------------------------------------------------- |
3251 | fat_SetFileEnd: |
3295 | fat_SetFileEnd: |
3252 | call fat_lock |
3296 | call fat_lock |
3253 | push edi |
3297 | push edi |
3254 | cmp byte [esi], 0 |
3298 | cmp byte [esi], 0 |
3255 | jnz @f |
3299 | jnz @f |
3256 | .access_denied: |
3300 | .access_denied: |
3257 | push ERROR_ACCESS_DENIED |
3301 | push ERROR_ACCESS_DENIED |
3258 | .ret: |
3302 | .ret: |
3259 | call fat_unlock |
3303 | call fat_unlock |
3260 | pop eax |
3304 | pop eax |
3261 | pop edi |
3305 | pop edi |
3262 | ret |
3306 | ret |
3263 | @@: |
3307 | @@: |
3264 | stdcall hd_find_lfn, [esp+4+4] |
3308 | stdcall hd_find_lfn, [esp+4+4] |
3265 | jnc @f |
3309 | jnc @f |
3266 | .reteax: |
3310 | .reteax: |
3267 | push eax |
3311 | push eax |
3268 | jmp .ret |
3312 | jmp .ret |
3269 | @@: |
3313 | @@: |
3270 | ; must not be directory |
3314 | ; must not be directory |
3271 | test byte [edi+11], 10h |
3315 | test byte [edi+11], 10h |
3272 | jnz .access_denied |
3316 | jnz .access_denied |
3273 | ; file size must not exceed 4 Gb |
3317 | ; file size must not exceed 4 Gb |
3274 | cmp dword [ebx+8], 0 |
3318 | cmp dword [ebx+8], 0 |
3275 | jz @f |
3319 | jz @f |
3276 | push ERROR_END_OF_FILE |
3320 | push ERROR_END_OF_FILE |
3277 | jmp .ret |
3321 | jmp .ret |
3278 | @@: |
3322 | @@: |
3279 | push eax ; save directory sector |
3323 | push eax ; save directory sector |
3280 | ; set file modification date/time to current |
3324 | ; set file modification date/time to current |
3281 | call fat_update_datetime |
3325 | call fat_update_datetime |
3282 | mov eax, [ebx+4] |
3326 | mov eax, [ebx+4] |
3283 | cmp eax, [edi+28] |
3327 | cmp eax, [edi+28] |
3284 | jb .truncate |
3328 | jb .truncate |
3285 | ja .expand |
3329 | ja .expand |
3286 | pop eax |
3330 | pop eax |
3287 | lea ebx, [ebp+FAT.buffer] |
3331 | lea ebx, [ebp+FAT.buffer] |
3288 | call fs_write32_sys |
3332 | call fs_write32_sys |
3289 | test eax, eax |
3333 | test eax, eax |
3290 | jz @f |
3334 | jz @f |
3291 | push ERROR_DEVICE |
3335 | push ERROR_DEVICE |
3292 | jmp .ret |
3336 | jmp .ret |
3293 | @@: |
3337 | @@: |
3294 | push 0 |
3338 | push 0 |
3295 | jmp .ret |
3339 | jmp .ret |
3296 | .expand: |
3340 | .expand: |
3297 | push ebx ebp ecx |
3341 | push ebx ebp ecx |
3298 | push dword [edi+28] ; save old size |
3342 | push dword [edi+28] ; save old size |
3299 | mov ecx, eax |
3343 | mov ecx, eax |
3300 | call hd_extend_file |
3344 | call hd_extend_file |
3301 | push eax ; return code |
3345 | push eax ; return code |
3302 | jnc .expand_ok |
3346 | jnc .expand_ok |
3303 | cmp al, ERROR_DISK_FULL |
3347 | cmp al, ERROR_DISK_FULL |
3304 | jz .disk_full |
3348 | jz .disk_full |
3305 | .pop_ret: |
3349 | .pop_ret: |
3306 | call update_disk |
3350 | call update_disk |
3307 | pop eax ecx ecx ebp ebx ecx |
3351 | pop eax ecx ecx ebp ebx ecx |
3308 | jmp .reteax |
3352 | jmp .reteax |
3309 | .expand_ok: |
3353 | .expand_ok: |
3310 | .disk_full: |
3354 | .disk_full: |
3311 | ; save directory |
3355 | ; save directory |
3312 | mov eax, [edi+28] |
3356 | mov eax, [edi+28] |
3313 | xchg eax, [esp+20] |
3357 | xchg eax, [esp+20] |
3314 | lea ebx, [ebp+FAT.buffer] |
3358 | lea ebx, [ebp+FAT.buffer] |
3315 | call fs_write32_sys |
3359 | call fs_write32_sys |
3316 | test eax, eax |
3360 | test eax, eax |
3317 | mov eax, [edi+20-2] |
3361 | mov eax, [edi+20-2] |
3318 | mov ax, [edi+26] |
3362 | mov ax, [edi+26] |
3319 | mov edi, eax |
3363 | mov edi, eax |
3320 | jz @f |
3364 | jz @f |
3321 | .pop_ret11: |
3365 | .pop_ret11: |
3322 | mov byte [esp], ERROR_DEVICE |
3366 | mov byte [esp], ERROR_DEVICE |
3323 | jmp .pop_ret |
3367 | jmp .pop_ret |
3324 | @@: |
3368 | @@: |
3325 | test edi, edi |
3369 | test edi, edi |
3326 | jz .pop_ret |
3370 | jz .pop_ret |
3327 | ; now zero new data |
3371 | ; now zero new data |
3328 | push 0 |
3372 | push 0 |
3329 | ; edi=current cluster, [esp]=sector in cluster |
3373 | ; edi=current cluster, [esp]=sector in cluster |
3330 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
3374 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
3331 | .zero_loop: |
3375 | .zero_loop: |
3332 | cmp edi, 2 |
3376 | cmp edi, 2 |
3333 | jb .error_fat |
3377 | jb .error_fat |
3334 | cmp edi, [ebp+FAT.fatRESERVED] |
3378 | cmp edi, [ebp+FAT.fatRESERVED] |
3335 | jae .error_fat |
3379 | jae .error_fat |
3336 | sub dword [esp+8], 0x200 |
3380 | sub dword [esp+8], 0x200 |
3337 | jae .next_cluster |
3381 | jae .next_cluster |
3338 | lea eax, [edi-2] |
3382 | lea eax, [edi-2] |
3339 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3383 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3340 | add eax, [ebp+FAT.DATA_START] |
3384 | add eax, [ebp+FAT.DATA_START] |
3341 | add eax, [esp] |
3385 | add eax, [esp] |
3342 | cmp dword [esp+8], -0x200 |
3386 | cmp dword [esp+8], -0x200 |
3343 | jz .noread |
3387 | jz .noread |
3344 | push eax |
3388 | push eax |
3345 | lea ebx, [ebp+FAT.buffer] |
3389 | lea ebx, [ebp+FAT.buffer] |
3346 | call fs_read32_app |
3390 | call fs_read32_app |
3347 | test eax, eax |
3391 | test eax, eax |
3348 | pop eax |
3392 | pop eax |
3349 | jnz .err_next |
3393 | jnz .err_next |
3350 | .noread: |
3394 | .noread: |
3351 | mov ecx, [esp+8] |
3395 | mov ecx, [esp+8] |
3352 | neg ecx |
3396 | neg ecx |
3353 | push edi |
3397 | push edi |
3354 | lea edi, [ebp+FAT.buffer+0x200] |
3398 | lea edi, [ebp+FAT.buffer+0x200] |
3355 | add edi, [esp+12] |
3399 | add edi, [esp+12] |
3356 | push eax |
3400 | push eax |
3357 | xor eax, eax |
3401 | xor eax, eax |
3358 | mov [esp+16], eax |
3402 | mov [esp+16], eax |
3359 | rep stosb |
3403 | rep stosb |
3360 | pop eax |
3404 | pop eax |
3361 | pop edi |
3405 | pop edi |
3362 | call fs_write32_app |
3406 | call fs_write32_app |
3363 | test eax, eax |
3407 | test eax, eax |
3364 | jz .next_cluster |
3408 | jz .next_cluster |
3365 | .err_next: |
3409 | .err_next: |
3366 | mov byte [esp+4], ERROR_DEVICE |
3410 | mov byte [esp+4], ERROR_DEVICE |
3367 | .next_cluster: |
3411 | .next_cluster: |
3368 | pop eax |
3412 | pop eax |
3369 | sub dword [esp+20], 0x200 |
3413 | sub dword [esp+20], 0x200 |
3370 | jbe .pop_ret |
3414 | jbe .pop_ret |
3371 | inc eax |
3415 | inc eax |
3372 | push eax |
3416 | push eax |
3373 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3417 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3374 | jb .zero_loop |
3418 | jb .zero_loop |
3375 | and dword [esp], 0 |
3419 | and dword [esp], 0 |
3376 | mov eax, edi |
3420 | mov eax, edi |
3377 | call get_FAT |
3421 | call get_FAT |
3378 | mov edi, eax |
3422 | mov edi, eax |
3379 | jnc .zero_loop |
3423 | jnc .zero_loop |
3380 | pop eax |
3424 | pop eax |
3381 | jmp .pop_ret11 |
3425 | jmp .pop_ret11 |
3382 | .truncate: |
3426 | .truncate: |
3383 | mov [edi+28], eax |
3427 | mov [edi+28], eax |
3384 | push ecx |
3428 | push ecx |
3385 | mov ecx, [edi+20-2] |
3429 | mov ecx, [edi+20-2] |
3386 | mov cx, [edi+26] |
3430 | mov cx, [edi+26] |
3387 | push eax |
3431 | push eax |
3388 | test eax, eax |
3432 | test eax, eax |
3389 | jz .zero_size |
3433 | jz .zero_size |
3390 | ; find new last cluster |
3434 | ; find new last cluster |
3391 | @@: |
3435 | @@: |
3392 | cmp ecx, 2 |
3436 | cmp ecx, 2 |
3393 | jb .error_fat2 |
3437 | jb .error_fat2 |
3394 | cmp ecx, [ebp+FAT.fatRESERVED] |
3438 | cmp ecx, [ebp+FAT.fatRESERVED] |
3395 | jae .error_fat2 |
3439 | jae .error_fat2 |
3396 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3440 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3397 | shl eax, 9 |
3441 | shl eax, 9 |
3398 | sub [esp], eax |
3442 | sub [esp], eax |
3399 | jbe @f |
3443 | jbe @f |
3400 | mov eax, ecx |
3444 | mov eax, ecx |
3401 | call get_FAT |
3445 | call get_FAT |
3402 | mov ecx, eax |
3446 | mov ecx, eax |
3403 | jnc @b |
3447 | jnc @b |
3404 | .device_err3: |
3448 | .device_err3: |
3405 | pop eax ecx eax edi |
3449 | pop eax ecx eax edi |
3406 | call update_disk |
3450 | call update_disk |
3407 | call fat_unlock |
3451 | call fat_unlock |
3408 | movi eax, ERROR_DEVICE |
3452 | movi eax, ERROR_DEVICE |
3409 | ret |
3453 | ret |
3410 | @@: |
3454 | @@: |
3411 | ; we will zero data at the end of last sector - remember it |
3455 | ; we will zero data at the end of last sector - remember it |
3412 | push ecx |
3456 | push ecx |
3413 | ; terminate FAT chain |
3457 | ; terminate FAT chain |
3414 | push edx |
3458 | push edx |
3415 | mov eax, ecx |
3459 | mov eax, ecx |
3416 | mov edx, [ebp+FAT.fatEND] |
3460 | mov edx, [ebp+FAT.fatEND] |
3417 | call set_FAT |
3461 | call set_FAT |
3418 | mov eax, edx |
3462 | mov eax, edx |
3419 | pop edx |
3463 | pop edx |
3420 | jnc @f |
3464 | jnc @f |
3421 | .device_err4: |
3465 | .device_err4: |
3422 | pop ecx |
3466 | pop ecx |
3423 | jmp .device_err3 |
3467 | jmp .device_err3 |
3424 | .zero_size: |
3468 | .zero_size: |
3425 | and word [edi+20], 0 |
3469 | and word [edi+20], 0 |
3426 | and word [edi+26], 0 |
3470 | and word [edi+26], 0 |
3427 | push 0 |
3471 | push 0 |
3428 | mov eax, ecx |
3472 | mov eax, ecx |
3429 | @@: |
3473 | @@: |
3430 | ; delete FAT chain |
3474 | ; delete FAT chain |
3431 | call clear_cluster_chain |
3475 | call clear_cluster_chain |
3432 | jc .device_err4 |
3476 | jc .device_err4 |
3433 | ; save directory |
3477 | ; save directory |
3434 | mov eax, [esp+12] |
3478 | mov eax, [esp+12] |
3435 | push ebx |
3479 | push ebx |
3436 | lea ebx, [ebp+FAT.buffer] |
3480 | lea ebx, [ebp+FAT.buffer] |
3437 | call fs_write32_sys |
3481 | call fs_write32_sys |
3438 | pop ebx |
3482 | pop ebx |
3439 | test eax, eax |
3483 | test eax, eax |
3440 | jnz .device_err4 |
3484 | jnz .device_err4 |
3441 | ; zero last sector, ignore errors |
3485 | ; zero last sector, ignore errors |
3442 | pop ecx |
3486 | pop ecx |
3443 | pop eax |
3487 | pop eax |
3444 | dec ecx |
3488 | dec ecx |
3445 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3489 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3446 | add ecx, [ebp+FAT.DATA_START] |
3490 | add ecx, [ebp+FAT.DATA_START] |
3447 | push eax |
3491 | push eax |
3448 | sar eax, 9 |
3492 | sar eax, 9 |
3449 | add ecx, eax |
3493 | add ecx, eax |
3450 | pop eax |
3494 | pop eax |
3451 | and eax, 0x1FF |
3495 | and eax, 0x1FF |
3452 | jz .truncate_done |
3496 | jz .truncate_done |
3453 | push ebx eax |
3497 | push ebx eax |
3454 | mov eax, ecx |
3498 | mov eax, ecx |
3455 | lea ebx, [ebp+FAT.buffer] |
3499 | lea ebx, [ebp+FAT.buffer] |
3456 | call fs_read32_app |
3500 | call fs_read32_app |
3457 | pop eax |
3501 | pop eax |
3458 | lea edi, [ebp+FAT.buffer+eax] |
3502 | lea edi, [ebp+FAT.buffer+eax] |
3459 | push ecx |
3503 | push ecx |
3460 | mov ecx, 0x200 |
3504 | mov ecx, 0x200 |
3461 | sub ecx, eax |
3505 | sub ecx, eax |
3462 | xor eax, eax |
3506 | xor eax, eax |
3463 | rep stosb |
3507 | rep stosb |
3464 | pop eax |
3508 | pop eax |
3465 | call fs_write32_app |
3509 | call fs_write32_app |
3466 | pop ebx |
3510 | pop ebx |
3467 | .truncate_done: |
3511 | .truncate_done: |
3468 | pop ecx eax edi |
3512 | pop ecx eax edi |
3469 | call update_disk |
3513 | call update_disk |
3470 | call fat_unlock |
3514 | call fat_unlock |
3471 | xor eax, eax |
3515 | xor eax, eax |
3472 | ret |
3516 | ret |
3473 | .error_fat: |
3517 | .error_fat: |
3474 | pop eax |
3518 | pop eax |
3475 | mov byte [esp], ERROR_FAT_TABLE |
3519 | mov byte [esp], ERROR_FAT_TABLE |
3476 | jmp .pop_ret |
3520 | jmp .pop_ret |
3477 | .error_fat2: |
3521 | .error_fat2: |
3478 | pop eax ecx eax edi |
3522 | pop eax ecx eax edi |
3479 | call update_disk |
3523 | call update_disk |
3480 | call fat_unlock |
3524 | call fat_unlock |
3481 | movi eax, ERROR_FAT_TABLE |
3525 | movi eax, ERROR_FAT_TABLE |
3482 | ret |
3526 | ret |
3483 | 3527 | ||
3484 | ;---------------------------------------------------------------- |
3528 | ;---------------------------------------------------------------- |
3485 | ; fat_GetFileInfo - FAT implementation of getting file info |
3529 | ; fat_GetFileInfo - FAT implementation of getting file info |
3486 | ; in: ebp = pointer to FAT structure |
3530 | ; in: ebp = pointer to FAT structure |
3487 | ; in: esi+[esp+4] = name |
3531 | ; in: esi+[esp+4] = name |
3488 | ; in: ebx = pointer to parameters from sysfunc 70 |
3532 | ; in: ebx = pointer to parameters from sysfunc 70 |
3489 | ; out: eax, ebx = return values for sysfunc 70 |
3533 | ; out: eax, ebx = return values for sysfunc 70 |
3490 | ;---------------------------------------------------------------- |
3534 | ;---------------------------------------------------------------- |
3491 | fat_GetFileInfo: |
3535 | fat_GetFileInfo: |
3492 | cmp byte [esi], 0 |
3536 | cmp byte [esi], 0 |
3493 | jnz @f |
3537 | jnz @f |
3494 | mov eax, 2 |
3538 | mov eax, 2 |
3495 | ret |
3539 | ret |
3496 | @@: |
3540 | @@: |
3497 | push edi |
3541 | push edi |
3498 | call fat_lock |
3542 | call fat_lock |
3499 | stdcall hd_find_lfn, [esp+4+4] |
3543 | stdcall hd_find_lfn, [esp+4+4] |
3500 | jc .error |
3544 | jc .error |
3501 | push ebp |
3545 | push ebp |
3502 | xor ebp, ebp |
3546 | xor ebp, ebp |
3503 | mov esi, [ebx+16] |
3547 | mov esi, [ebx+16] |
3504 | mov dword [esi+4], ebp |
3548 | mov dword [esi+4], ebp |
3505 | call fat_entry_to_bdfe2 |
3549 | call fat_entry_to_bdfe2 |
3506 | pop ebp |
3550 | pop ebp |
3507 | call fat_unlock |
3551 | call fat_unlock |
3508 | xor eax, eax |
3552 | xor eax, eax |
3509 | pop edi |
3553 | pop edi |
3510 | ret |
3554 | ret |
3511 | .error: |
3555 | .error: |
3512 | push eax |
3556 | push eax |
3513 | call fat_unlock |
3557 | call fat_unlock |
3514 | pop eax |
3558 | pop eax |
3515 | pop edi |
3559 | pop edi |
3516 | ret |
3560 | ret |
3517 | 3561 | ||
3518 | ;---------------------------------------------------------------- |
3562 | ;---------------------------------------------------------------- |
3519 | ; fat_SetFileInfo - FAT implementation of setting file info |
3563 | ; fat_SetFileInfo - FAT implementation of setting file info |
3520 | ; in: ebp = pointer to FAT structure |
3564 | ; in: ebp = pointer to FAT structure |
3521 | ; in: esi+[esp+4] = name |
3565 | ; in: esi+[esp+4] = name |
3522 | ; in: ebx = pointer to parameters from sysfunc 70 |
3566 | ; in: ebx = pointer to parameters from sysfunc 70 |
3523 | ; out: eax, ebx = return values for sysfunc 70 |
3567 | ; out: eax, ebx = return values for sysfunc 70 |
3524 | ;---------------------------------------------------------------- |
3568 | ;---------------------------------------------------------------- |
3525 | fat_SetFileInfo: |
3569 | fat_SetFileInfo: |
3526 | cmp byte [esi], 0 |
3570 | cmp byte [esi], 0 |
3527 | jnz @f |
3571 | jnz @f |
3528 | mov eax, 2 |
3572 | mov eax, 2 |
3529 | ret |
3573 | ret |
3530 | @@: |
3574 | @@: |
3531 | push edi |
3575 | push edi |
3532 | call fat_lock |
3576 | call fat_lock |
3533 | stdcall hd_find_lfn, [esp+4+4] |
3577 | stdcall hd_find_lfn, [esp+4+4] |
3534 | jc .error |
3578 | jc .error |
3535 | push eax |
3579 | push eax |
3536 | mov edx, [ebx+16] |
3580 | mov edx, [ebx+16] |
3537 | call bdfe_to_fat_entry |
3581 | call bdfe_to_fat_entry |
3538 | pop eax |
3582 | pop eax |
3539 | lea ebx, [ebp+FAT.buffer] |
3583 | lea ebx, [ebp+FAT.buffer] |
3540 | call fs_write32_sys |
3584 | call fs_write32_sys |
3541 | call update_disk |
3585 | call update_disk |
3542 | call fat_unlock |
3586 | call fat_unlock |
3543 | pop edi |
3587 | pop edi |
3544 | xor eax, eax |
3588 | xor eax, eax |
3545 | ret |
3589 | ret |
3546 | .error: |
3590 | .error: |
3547 | push eax |
3591 | push eax |
3548 | call fat_unlock |
3592 | call fat_unlock |
3549 | pop eax |
3593 | pop eax |
3550 | pop edi |
3594 | pop edi |
3551 | ret |
3595 | ret |
3552 | 3596 | ||
3553 | ;---------------------------------------------------------------- |
3597 | ;---------------------------------------------------------------- |
3554 | ; fat_Delete - FAT implementation of deleting a file/folder |
3598 | ; fat_Delete - FAT implementation of deleting a file/folder |
3555 | ; in: ebp = pointer to FAT structure |
3599 | ; in: ebp = pointer to FAT structure |
3556 | ; in: esi+[esp+4] = name |
3600 | ; in: esi+[esp+4] = name |
3557 | ; in: ebx = pointer to parameters from sysfunc 70 |
3601 | ; in: ebx = pointer to parameters from sysfunc 70 |
3558 | ; out: eax, ebx = return values for sysfunc 70 |
3602 | ; out: eax, ebx = return values for sysfunc 70 |
3559 | ;---------------------------------------------------------------- |
3603 | ;---------------------------------------------------------------- |
3560 | fat_Delete: |
3604 | fat_Delete: |
3561 | call fat_lock |
3605 | call fat_lock |
3562 | cmp byte [esi], 0 |
3606 | cmp byte [esi], 0 |
3563 | jnz @f |
3607 | jnz @f |
3564 | ; cannot delete root! |
3608 | ; cannot delete root! |
3565 | .access_denied: |
3609 | .access_denied: |
3566 | push ERROR_ACCESS_DENIED |
3610 | push ERROR_ACCESS_DENIED |
3567 | .pop_ret: |
3611 | .pop_ret: |
3568 | call fat_unlock |
3612 | call fat_unlock |
3569 | pop eax |
3613 | pop eax |
3570 | xor ebx, ebx |
3614 | xor ebx, ebx |
3571 | ret |
3615 | ret |
3572 | @@: |
3616 | @@: |
3573 | and [ebp+FAT.longname_sec1], 0 |
3617 | and [ebp+FAT.longname_sec1], 0 |
3574 | and [ebp+FAT.longname_sec2], 0 |
3618 | and [ebp+FAT.longname_sec2], 0 |
3575 | push edi |
3619 | push edi |
3576 | stdcall hd_find_lfn, [esp+4+4] |
3620 | stdcall hd_find_lfn, [esp+4+4] |
3577 | jnc .found |
3621 | jnc .found |
3578 | pop edi |
3622 | pop edi |
3579 | push ERROR_FILE_NOT_FOUND |
3623 | push ERROR_FILE_NOT_FOUND |
3580 | jmp .pop_ret |
3624 | jmp .pop_ret |
3581 | .found: |
3625 | .found: |
3582 | cmp dword [edi], '. ' |
3626 | cmp dword [edi], '. ' |
3583 | jz .access_denied2 |
3627 | jz .access_denied2 |
3584 | cmp dword [edi], '.. ' |
3628 | cmp dword [edi], '.. ' |
3585 | jz .access_denied2 |
3629 | jz .access_denied2 |
3586 | test byte [edi+11], 10h |
3630 | test byte [edi+11], 10h |
3587 | jz .dodel |
3631 | jz .dodel |
3588 | ; we can delete only empty folders! |
3632 | ; we can delete only empty folders! |
3589 | pushad |
3633 | pushad |
3590 | mov esi, [edi+20-2] |
3634 | mov esi, [edi+20-2] |
3591 | mov si, [edi+26] |
3635 | mov si, [edi+26] |
3592 | xor ecx, ecx |
3636 | xor ecx, ecx |
3593 | lea eax, [esi-2] |
3637 | lea eax, [esi-2] |
3594 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3638 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3595 | add eax, [ebp+FAT.DATA_START] |
3639 | add eax, [ebp+FAT.DATA_START] |
3596 | lea ebx, [ebp+FAT.buffer] |
3640 | lea ebx, [ebp+FAT.buffer] |
3597 | call fs_read32_sys |
3641 | call fs_read32_sys |
3598 | test eax, eax |
3642 | test eax, eax |
3599 | jnz .err1 |
3643 | jnz .err1 |
3600 | lea eax, [ebx+0x200] |
3644 | lea eax, [ebx+0x200] |
3601 | add ebx, 2*0x20 |
3645 | add ebx, 2*0x20 |
3602 | .checkempty: |
3646 | .checkempty: |
3603 | cmp byte [ebx], 0 |
3647 | cmp byte [ebx], 0 |
3604 | jz .empty |
3648 | jz .empty |
3605 | cmp byte [ebx], 0xE5 |
3649 | cmp byte [ebx], 0xE5 |
3606 | jnz .notempty |
3650 | jnz .notempty |
3607 | add ebx, 0x20 |
3651 | add ebx, 0x20 |
3608 | cmp ebx, eax |
3652 | cmp ebx, eax |
3609 | jb .checkempty |
3653 | jb .checkempty |
3610 | inc ecx |
3654 | inc ecx |
3611 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3655 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3612 | jb @f |
3656 | jb @f |
3613 | mov eax, esi |
3657 | mov eax, esi |
3614 | call get_FAT |
3658 | call get_FAT |
3615 | jc .err1 |
3659 | jc .err1 |
3616 | cmp eax, 2 |
3660 | cmp eax, 2 |
3617 | jb .error_fat |
3661 | jb .error_fat |
3618 | cmp eax, [ebp+FAT.fatRESERVED] |
3662 | cmp eax, [ebp+FAT.fatRESERVED] |
3619 | jae .empty |
3663 | jae .empty |
3620 | mov esi, eax |
3664 | mov esi, eax |
3621 | xor ecx, ecx |
3665 | xor ecx, ecx |
3622 | @@: |
3666 | @@: |
3623 | lea eax, [esi-2] |
3667 | lea eax, [esi-2] |
3624 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3668 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3625 | add eax, [ebp+FAT.DATA_START] |
3669 | add eax, [ebp+FAT.DATA_START] |
3626 | add eax, ecx |
3670 | add eax, ecx |
3627 | lea ebx, [ebp+FAT.buffer] |
3671 | lea ebx, [ebp+FAT.buffer] |
3628 | call fs_read32_sys |
3672 | call fs_read32_sys |
3629 | test eax, eax |
3673 | test eax, eax |
3630 | lea eax, [ebx+0x200] |
3674 | lea eax, [ebx+0x200] |
3631 | jz .checkempty |
3675 | jz .checkempty |
3632 | .err1: |
3676 | .err1: |
3633 | popad |
3677 | popad |
3634 | .err2: |
3678 | .err2: |
3635 | pop edi |
3679 | pop edi |
3636 | call fat_unlock |
3680 | call fat_unlock |
3637 | movi eax, ERROR_DEVICE |
3681 | movi eax, ERROR_DEVICE |
3638 | ret |
3682 | ret |
3639 | .error_fat: |
3683 | .error_fat: |
3640 | popad |
3684 | popad |
3641 | pop edi |
3685 | pop edi |
3642 | call fat_unlock |
3686 | call fat_unlock |
3643 | movi eax, ERROR_FAT_TABLE |
3687 | movi eax, ERROR_FAT_TABLE |
3644 | ret |
3688 | ret |
3645 | .notempty: |
3689 | .notempty: |
3646 | popad |
3690 | popad |
3647 | .access_denied2: |
3691 | .access_denied2: |
3648 | pop edi |
3692 | pop edi |
3649 | call fat_unlock |
3693 | call fat_unlock |
3650 | movi eax, ERROR_ACCESS_DENIED |
3694 | movi eax, ERROR_ACCESS_DENIED |
3651 | ret |
3695 | ret |
3652 | .empty: |
3696 | .empty: |
3653 | popad |
3697 | popad |
3654 | push eax ebx |
3698 | push eax ebx |
3655 | lea ebx, [ebp+FAT.buffer] |
3699 | lea ebx, [ebp+FAT.buffer] |
3656 | call fs_read32_sys |
3700 | call fs_read32_sys |
3657 | test eax, eax |
3701 | test eax, eax |
3658 | pop ebx eax |
3702 | pop ebx eax |
3659 | jnz .err2 |
3703 | jnz .err2 |
3660 | .dodel: |
3704 | .dodel: |
3661 | push eax |
3705 | push eax |
3662 | mov eax, [edi+20-2] |
3706 | mov eax, [edi+20-2] |
3663 | mov ax, [edi+26] |
3707 | mov ax, [edi+26] |
3664 | xchg eax, [esp] |
3708 | xchg eax, [esp] |
3665 | ; delete folder entry |
3709 | ; delete folder entry |
3666 | mov byte [edi], 0xE5 |
3710 | mov byte [edi], 0xE5 |
3667 | ; delete LFN (if present) |
3711 | ; delete LFN (if present) |
3668 | .lfndel: |
3712 | .lfndel: |
3669 | lea edx, [ebp+FAT.buffer] |
3713 | lea edx, [ebp+FAT.buffer] |
3670 | cmp edi, edx |
3714 | cmp edi, edx |
3671 | ja @f |
3715 | ja @f |
3672 | cmp [ebp+FAT.longname_sec2], 0 |
3716 | cmp [ebp+FAT.longname_sec2], 0 |
3673 | jz .lfndone |
3717 | jz .lfndone |
3674 | push [ebp+FAT.longname_sec2] |
3718 | push [ebp+FAT.longname_sec2] |
3675 | push [ebp+FAT.longname_sec1] |
3719 | push [ebp+FAT.longname_sec1] |
3676 | pop [ebp+FAT.longname_sec2] |
3720 | pop [ebp+FAT.longname_sec2] |
3677 | and [ebp+FAT.longname_sec1], 0 |
3721 | and [ebp+FAT.longname_sec1], 0 |
3678 | push ebx |
3722 | push ebx |
3679 | mov ebx, edx |
3723 | mov ebx, edx |
3680 | call fs_write32_sys |
3724 | call fs_write32_sys |
3681 | mov eax, [esp+4] |
3725 | mov eax, [esp+4] |
3682 | call fs_read32_sys |
3726 | call fs_read32_sys |
3683 | pop ebx |
3727 | pop ebx |
3684 | pop eax |
3728 | pop eax |
3685 | lea edi, [ebp+FAT.buffer+0x200] |
3729 | lea edi, [ebp+FAT.buffer+0x200] |
3686 | @@: |
3730 | @@: |
3687 | sub edi, 0x20 |
3731 | sub edi, 0x20 |
3688 | cmp byte [edi], 0xE5 |
3732 | cmp byte [edi], 0xE5 |
3689 | jz .lfndone |
3733 | jz .lfndone |
3690 | cmp byte [edi+11], 0xF |
3734 | cmp byte [edi+11], 0xF |
3691 | jnz .lfndone |
3735 | jnz .lfndone |
3692 | mov byte [edi], 0xE5 |
3736 | mov byte [edi], 0xE5 |
3693 | jmp .lfndel |
3737 | jmp .lfndel |
3694 | .lfndone: |
3738 | .lfndone: |
3695 | push ebx |
3739 | push ebx |
3696 | lea ebx, [ebp+FAT.buffer] |
3740 | lea ebx, [ebp+FAT.buffer] |
3697 | call fs_write32_sys |
3741 | call fs_write32_sys |
3698 | pop ebx |
3742 | pop ebx |
3699 | ; delete FAT chain |
3743 | ; delete FAT chain |
3700 | pop eax |
3744 | pop eax |
3701 | call clear_cluster_chain |
3745 | call clear_cluster_chain |
3702 | call update_disk |
3746 | call update_disk |
3703 | call fat_unlock |
3747 | call fat_unlock |
3704 | pop edi |
3748 | pop edi |
3705 | xor eax, eax |
3749 | xor eax, eax |
3706 | ret |
3750 | ret |
3707 | 3751 | ||
3708 | ; \end{diamond}=>=>=>=>=>=>>65536 |
3752 | ; \end{diamond}=>=>=>=>=>=>>65536 |
3709 | >65536 |
3753 | >65536 |
3710 | >> |
3754 | >> |