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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 | ;; FAT functions for KolibriOS ;; |
6 | ;; FAT functions for KolibriOS ;; |
7 | ;; ;; |
7 | ;; ;; |
8 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
8 | ;; Copyright 2002 Paolo Minazzi, paolo.minazzi@inwind.it ;; |
9 | ;; ;; |
9 | ;; ;; |
10 | ;; See file COPYING for details ;; |
10 | ;; See file COPYING for details ;; |
11 | ;; 06.2015 fs_read64 - pathoswithin ;; |
11 | ;; 06.2015 fs_read64 - pathoswithin ;; |
12 | ;; 04.02.2007 LFN create folder - diamond ;; |
12 | ;; 04.02.2007 LFN create folder - diamond ;; |
13 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
13 | ;; 08.10.2006 LFN delete file/folder - diamond ;; |
14 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
14 | ;; 20.08.2006 LFN set file size (truncate/extend) - diamond ;; |
15 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
15 | ;; 17.08.2006 LFN write/append to file - diamond ;; |
16 | ;; 23.06.2006 LFN start application - diamond ;; |
16 | ;; 23.06.2006 LFN start application - diamond ;; |
17 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
17 | ;; 15.06.2006 LFN get/set file/folder info - diamond ;; |
18 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
18 | ;; 27.05.2006 LFN create/rewrite file - diamond ;; |
19 | ;; 04.05.2006 LFN read folder - diamond ;; |
19 | ;; 04.05.2006 LFN read folder - diamond ;; |
20 | ;; 29.04.2006 Elimination of hangup after the ;; |
20 | ;; 29.04.2006 Elimination of hangup after the ;; |
21 | ;; expiration hd_wait_timeout - Mario79 ;; |
21 | ;; expiration hd_wait_timeout - Mario79 ;; |
22 | ;; 23.04.2006 LFN read file - diamond ;; |
22 | ;; 23.04.2006 LFN read file - diamond ;; |
23 | ;; 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 ;; |
24 | ;; to MBR, see file part_set.inc - Mario79 ;; |
24 | ;; to MBR, see file part_set.inc - Mario79 ;; |
25 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
25 | ;; 15.01.2005 get file size/attr/date, file_append - ATV ;; |
26 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
26 | ;; 04.12.2004 skip volume label, file delete bug fixed - ATV ;; |
27 | ;; 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 ;; |
28 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
28 | ;; 23.11.2004 don't allow overwrite dir with file - ATV ;; |
29 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
29 | ;; 18.11.2004 get_disk_info and more error codes - ATV ;; |
30 | ;; 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 ;; |
31 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
31 | ;; 10.11.2004 removedir clear whole directory structure - ATV ;; |
32 | ;; 08.11.2004 rename - ATV ;; |
32 | ;; 08.11.2004 rename - ATV ;; |
33 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
33 | ;; 30.10.2004 file_read return also dirsize in bytes - ATV ;; |
34 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
34 | ;; 20.10.2004 Makedir/Removedir - ATV ;; |
35 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
35 | ;; 14.10.2004 Partition chain/Fat16 - ATV (thanks drh3xx) ;; |
36 | ;; 06.09.2004 Fix free space - Mario79 ;; |
36 | ;; 06.09.2004 Fix free space - Mario79 ;; |
37 | ;; 24.05.2004 Write back buffer for File_write - VT ;; |
37 | ;; 24.05.2004 Write back buffer for File_write - VT ;; |
38 | ;; 20.05.2004 File_read function to work with syscall 58 - VT ;; |
38 | ;; 20.05.2004 File_read function to work with syscall 58 - VT ;; |
39 | ;; 30.03.2004 Error parameters at function return - VT ;; |
39 | ;; 30.03.2004 Error parameters at function return - VT ;; |
40 | ;; 29.06.2002 Improved fat32 verification - VT ;; |
40 | ;; 29.06.2002 Improved fat32 verification - VT ;; |
41 | ;; 20.05.2002 Hd status check - VT ;; |
41 | ;; 20.05.2002 Hd status check - VT ;; |
42 | ;; 01.05.2002 Bugfix in device write - VT ;; |
42 | ;; 01.05.2002 Bugfix in device write - VT ;; |
43 | ;; ;; |
43 | ;; ;; |
44 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
44 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
45 | 45 | ||
46 | $Revision: 5578 $ |
46 | $Revision: 5578 $ |
47 | 47 | ||
48 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
48 | cache_max equ 1919 ; max. is 1919*512+0x610000=0x6ffe00 |
49 | 49 | ||
50 | PUSHAD_EAX equ [esp+28] |
50 | PUSHAD_EAX equ [esp+28] |
51 | PUSHAD_ECX equ [esp+24] |
51 | PUSHAD_ECX equ [esp+24] |
52 | PUSHAD_EDX equ [esp+20] |
52 | PUSHAD_EDX equ [esp+20] |
53 | PUSHAD_EBX equ [esp+16] |
53 | PUSHAD_EBX equ [esp+16] |
54 | PUSHAD_EBP equ [esp+8] |
54 | PUSHAD_EBP equ [esp+8] |
55 | PUSHAD_ESI equ [esp+4] |
55 | PUSHAD_ESI equ [esp+4] |
56 | PUSHAD_EDI equ [esp+0] |
56 | PUSHAD_EDI equ [esp+0] |
57 | 57 | ||
58 | ; Internal data for every FAT partition. |
58 | ; Internal data for every FAT partition. |
59 | struct FAT PARTITION |
59 | struct FAT PARTITION |
60 | fs_type db ? |
60 | fs_type db ? |
61 | fat16_root db 0 ; flag for fat16 rootdir |
61 | fat16_root db 0 ; flag for fat16 rootdir |
62 | fat_change db 0 ; 1=fat has changed |
62 | fat_change db 0 ; 1=fat has changed |
63 | rb 1 |
63 | rb 1 |
64 | Lock MUTEX ? ; currently operations with one partition |
64 | Lock MUTEX ? ; currently operations with one partition |
65 | ; can not be executed in parallel since the legacy code is not ready |
65 | ; can not be executed in parallel since the legacy code is not ready |
66 | SECTORS_PER_FAT dd 0x1f3a |
66 | SECTORS_PER_FAT dd 0x1f3a |
67 | NUMBER_OF_FATS dd 0x2 |
67 | NUMBER_OF_FATS dd 0x2 |
68 | SECTORS_PER_CLUSTER dd 0x8 |
68 | SECTORS_PER_CLUSTER dd 0x8 |
69 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
69 | BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes |
70 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
70 | ROOT_CLUSTER dd 2 ; first rootdir cluster |
71 | FAT_START dd 0 ; start of fat table |
71 | FAT_START dd 0 ; start of fat table |
72 | ROOT_START dd 0 ; start of rootdir (only fat16) |
72 | ROOT_START dd 0 ; start of rootdir (only fat16) |
73 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
73 | ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16) |
74 | DATA_START dd 0 ; start of data area (=first cluster 2) |
74 | DATA_START dd 0 ; start of data area (=first cluster 2) |
75 | LAST_CLUSTER dd 0 ; last availabe cluster |
75 | LAST_CLUSTER dd 0 ; last availabe cluster |
76 | ADR_FSINFO dd 0 ; used only by fat32 |
76 | ADR_FSINFO dd 0 ; used only by fat32 |
77 | 77 | ||
78 | fatRESERVED dd 0x0FFFFFF6 |
78 | fatRESERVED dd 0x0FFFFFF6 |
79 | fatBAD dd 0x0FFFFFF7 |
79 | fatBAD dd 0x0FFFFFF7 |
80 | fatEND dd 0x0FFFFFF8 |
80 | fatEND dd 0x0FFFFFF8 |
81 | fatMASK dd 0x0FFFFFFF |
81 | fatMASK dd 0x0FFFFFFF |
82 | 82 | ||
83 | fatStartScan dd 2 |
83 | fatStartScan dd 2 |
84 | cluster_tmp dd 0 ; used by analyze_directory |
84 | cluster_tmp dd 0 ; used by analyze_directory |
85 | ; and analyze_directory_to_write |
85 | ; and analyze_directory_to_write |
86 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
86 | longname_sec1 dd 0 ; used by analyze_directory to save 2 previous |
87 | longname_sec2 dd 0 ; directory sectors for delete long filename |
87 | longname_sec2 dd 0 ; directory sectors for delete long filename |
88 | fat_in_cache dd -1 |
88 | fat_in_cache dd -1 |
89 | 89 | ||
90 | ; For FAT16/FAT32, this points to 512-byte buffer for the current sector of FAT. |
90 | ; For FAT16/FAT32, this points to 512-byte buffer for the current sector of FAT. |
91 | ; For FAT12, the entire FAT structure is read |
91 | ; For FAT12, the entire FAT structure is read |
92 | ; and unpacked from 12bit per cluster to word per cluster. |
92 | ; and unpacked from 12bit per cluster to word per cluster. |
93 | 93 | ||
94 | ; Note: work with unpacked copy of FAT12 means |
94 | ; Note: work with unpacked copy of FAT12 means |
95 | ; additional memory and additional code for packing/unpacking. |
95 | ; additional memory and additional code for packing/unpacking. |
96 | ; I'm not sure that the economy justifies the cost, but anyway, |
96 | ; I'm not sure that the economy justifies the cost, but anyway, |
97 | ; there is how work was done before my edits, and I'm just keeping the principle. |
97 | ; there is how work was done before my edits, and I'm just keeping the principle. |
98 | fat_cache_ptr dd ? |
98 | fat_cache_ptr dd ? |
99 | fat12_unpacked_ptr dd ? |
99 | fat12_unpacked_ptr dd ? |
100 | buffer rb 512 |
100 | buffer rb 512 |
101 | fsinfo_buffer rb 512 |
101 | fsinfo_buffer rb 512 |
102 | ends |
102 | ends |
103 | 103 | ||
104 | uglobal |
104 | uglobal |
105 | align 4 |
105 | align 4 |
106 | partition_count dd 0 ; partitions found by set_FAT32_variables |
106 | partition_count dd 0 ; partitions found by set_FAT32_variables |
107 | hd_error dd 0 |
107 | hd_error dd 0 |
108 | hd_setup dd 0 |
108 | hd_setup dd 0 |
109 | hd_wait_timeout dd 0 |
109 | hd_wait_timeout dd 0 |
110 | cache_search_start dd 0 ; used by find_empty_slot |
110 | cache_search_start dd 0 ; used by find_empty_slot |
111 | endg |
111 | endg |
112 | 112 | ||
113 | uglobal |
113 | uglobal |
114 | align 4 |
114 | align 4 |
115 | Sector512: ; label for dev_hdcd.inc |
115 | Sector512: ; label for dev_hdcd.inc |
116 | buffer: |
116 | buffer: |
117 | rb 512 |
117 | rb 512 |
118 | endg |
118 | endg |
119 | 119 | ||
120 | iglobal |
120 | iglobal |
121 | align 4 |
121 | align 4 |
122 | fat_user_functions: |
122 | fat_user_functions: |
123 | dd fat_free |
123 | dd fat_free |
124 | dd (fat_user_functions_end - fat_user_functions - 4) / 4 |
124 | dd (fat_user_functions_end - fat_user_functions - 4) / 4 |
125 | dd fat_Read |
125 | dd fat_Read |
126 | dd fat_ReadFolder |
126 | dd fat_ReadFolder |
127 | dd fat_Rewrite |
127 | dd fat_Rewrite |
128 | dd fat_Write |
128 | dd fat_Write |
129 | dd fat_SetFileEnd |
129 | dd fat_SetFileEnd |
130 | dd fat_GetFileInfo |
130 | dd fat_GetFileInfo |
131 | dd fat_SetFileInfo |
131 | dd fat_SetFileInfo |
132 | dd 0 |
132 | dd 0 |
133 | dd fat_Delete |
133 | dd fat_Delete |
134 | dd fat_CreateFolder |
134 | dd fat_CreateFolder |
135 | fat_user_functions_end: |
135 | fat_user_functions_end: |
136 | endg |
136 | endg |
137 | 137 | ||
138 | ; these labels are located before the main function to make |
138 | ; these labels are located before the main function to make |
139 | ; most of jumps to these be short |
139 | ; most of jumps to these be short |
140 | fat_create_partition.free_return0: |
140 | fat_create_partition.free_return0: |
141 | mov eax, ebp |
141 | mov eax, ebp |
142 | call free |
142 | call free |
143 | pop ebp |
143 | pop ebp |
144 | fat_create_partition.return0: |
144 | fat_create_partition.return0: |
145 | xor eax, eax |
145 | xor eax, eax |
146 | ret |
146 | ret |
147 | fat_create_partition: |
147 | fat_create_partition: |
148 | ; sector size must be 512 |
148 | ; sector size must be 512 |
149 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
149 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
150 | jnz .return0 |
150 | jnz .return0 |
151 | ; bootsector must have been successfully read |
151 | ; bootsector must have been successfully read |
152 | cmp dword [esp+4], 0 |
152 | cmp dword [esp+4], 0 |
153 | jnz .return0 |
153 | jnz .return0 |
154 | ; bootsector signature must be correct |
154 | ; bootsector signature must be correct |
155 | cmp word [ebx+0x1fe], 0xaa55 |
155 | cmp word [ebx+0x1fe], 0xaa55 |
156 | jnz .return0 |
156 | jnz .return0 |
157 | ; sectors per cluster must be nonzero |
157 | ; sectors per cluster must be nonzero |
158 | cmp byte [ebx+0xd], 0 |
158 | cmp byte [ebx+0xd], 0 |
159 | jz .return0 |
159 | jz .return0 |
160 | ; bytes per sector must be 0x200 |
160 | ; bytes per sector must be 0x200 |
161 | cmp word [ebx+0xb], 0x200 |
161 | cmp word [ebx+0xb], 0x200 |
162 | jnz .return0 |
162 | jnz .return0 |
163 | ; number of fats must be nonzero |
163 | ; number of fats must be nonzero |
164 | cmp byte [ebx+0x10], 0 |
164 | cmp byte [ebx+0x10], 0 |
165 | jz .return0 |
165 | jz .return0 |
166 | ; The only reason to be invalid partition now is FAT12. Since the test for |
166 | ; The only reason to be invalid partition now is FAT12. Since the test for |
167 | ; FAT size requires knowledge of some calculated values, which are also used |
167 | ; FAT size requires knowledge of some calculated values, which are also used |
168 | ; in the normal operation, let's hope for the best and allocate data now; if |
168 | ; in the normal operation, let's hope for the best and allocate data now; if |
169 | ; it will prove wrong, just deallocate it. |
169 | ; it will prove wrong, just deallocate it. |
170 | movi eax, sizeof.FAT |
170 | movi eax, sizeof.FAT |
171 | call malloc |
171 | call malloc |
172 | test eax, eax |
172 | test eax, eax |
173 | jz .return0 |
173 | jz .return0 |
174 | mov ecx, dword [ebp+PARTITION.FirstSector] |
174 | mov ecx, dword [ebp+PARTITION.FirstSector] |
175 | mov dword [eax+FAT.FirstSector], ecx |
175 | mov dword [eax+FAT.FirstSector], ecx |
176 | mov ecx, dword [ebp+PARTITION.FirstSector+4] |
176 | mov ecx, dword [ebp+PARTITION.FirstSector+4] |
177 | mov dword [eax+FAT.FirstSector+4], ecx |
177 | mov dword [eax+FAT.FirstSector+4], ecx |
178 | mov ecx, dword [ebp+PARTITION.Length] |
178 | mov ecx, dword [ebp+PARTITION.Length] |
179 | mov dword [eax+FAT.Length], ecx |
179 | mov dword [eax+FAT.Length], ecx |
180 | mov ecx, dword [ebp+PARTITION.Length+4] |
180 | mov ecx, dword [ebp+PARTITION.Length+4] |
181 | mov dword [eax+FAT.Length+4], ecx |
181 | mov dword [eax+FAT.Length+4], ecx |
182 | mov ecx, [ebp+PARTITION.Disk] |
182 | mov ecx, [ebp+PARTITION.Disk] |
183 | mov [eax+FAT.Disk], ecx |
183 | mov [eax+FAT.Disk], ecx |
184 | mov [eax+FAT.FSUserFunctions], fat_user_functions |
184 | mov [eax+FAT.FSUserFunctions], fat_user_functions |
185 | or [eax+FAT.fat_in_cache], -1 |
185 | or [eax+FAT.fat_in_cache], -1 |
186 | mov [eax+FAT.fat_change], 0 |
186 | mov [eax+FAT.fat_change], 0 |
187 | push ebp |
187 | push ebp |
188 | mov ebp, eax |
188 | mov ebp, eax |
189 | 189 | ||
190 | lea ecx, [ebp+FAT.Lock] |
190 | lea ecx, [ebp+FAT.Lock] |
191 | call mutex_init |
191 | call mutex_init |
192 | 192 | ||
193 | movzx eax, word [ebx+0xe] ; sectors reserved |
193 | movzx eax, word [ebx+0xe] ; sectors reserved |
194 | mov [ebp+FAT.FAT_START], eax |
194 | mov [ebp+FAT.FAT_START], eax |
195 | 195 | ||
196 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
196 | movzx eax, byte [ebx+0xd] ; sectors per cluster |
197 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
197 | mov [ebp+FAT.SECTORS_PER_CLUSTER], eax |
198 | 198 | ||
199 | movzx ecx, word [ebx+0xb] ; bytes per sector |
199 | movzx ecx, word [ebx+0xb] ; bytes per sector |
200 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
200 | mov [ebp+FAT.BYTES_PER_SECTOR], ecx |
201 | 201 | ||
202 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
202 | movzx eax, word [ebx+0x11] ; count of rootdir entries (=0 fat32) |
203 | shl eax, 5 ; mul 32 |
203 | shl eax, 5 ; mul 32 |
204 | dec ecx |
204 | dec ecx |
205 | add eax, ecx ; round up if not equal count |
205 | add eax, ecx ; round up if not equal count |
206 | inc ecx ; bytes per sector |
206 | inc ecx ; bytes per sector |
207 | xor edx, edx |
207 | xor edx, edx |
208 | div ecx |
208 | div ecx |
209 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
209 | mov [ebp+FAT.ROOT_SECTORS], eax ; count of rootdir sectors |
210 | 210 | ||
211 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
211 | movzx eax, word [ebx+0x16] ; sectors per fat <65536 |
212 | test eax, eax |
212 | test eax, eax |
213 | jnz @f |
213 | jnz @f |
214 | mov eax, [ebx+0x24] ; sectors per fat |
214 | mov eax, [ebx+0x24] ; sectors per fat |
215 | @@: |
215 | @@: |
216 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
216 | mov [ebp+FAT.SECTORS_PER_FAT], eax |
217 | 217 | ||
218 | movzx eax, byte [ebx+0x10] ; number of fats |
218 | movzx eax, byte [ebx+0x10] ; number of fats |
219 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
219 | mov [ebp+FAT.NUMBER_OF_FATS], eax |
220 | mul [ebp+FAT.SECTORS_PER_FAT] |
220 | mul [ebp+FAT.SECTORS_PER_FAT] |
221 | test edx, edx |
221 | test edx, edx |
222 | jnz .free_return0 |
222 | jnz .free_return0 |
223 | add eax, [ebp+FAT.FAT_START] |
223 | add eax, [ebp+FAT.FAT_START] |
224 | jc .free_return0 |
224 | jc .free_return0 |
225 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
225 | mov [ebp+FAT.ROOT_START], eax ; rootdir = fat_start + fat_size * fat_count |
226 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
226 | add eax, [ebp+FAT.ROOT_SECTORS] ; rootdir sectors should be 0 on fat32 |
227 | jc .free_return0 |
227 | jc .free_return0 |
228 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
228 | mov [ebp+FAT.DATA_START], eax ; data area = rootdir + rootdir_size |
229 | 229 | ||
230 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
230 | movzx eax, word [ebx+0x13] ; total sector count <65536 |
231 | test eax, eax |
231 | test eax, eax |
232 | jnz @f |
232 | jnz @f |
233 | mov eax, [ebx+0x20] ; total sector count |
233 | mov eax, [ebx+0x20] ; total sector count |
234 | @@: |
234 | @@: |
235 | ; total sector count must not exceed partition size |
235 | ; total sector count must not exceed partition size |
236 | cmp dword [ebp+FAT.Length+4], 0 |
236 | cmp dword [ebp+FAT.Length+4], 0 |
237 | jnz @f |
237 | jnz @f |
238 | cmp eax, dword [ebp+FAT.Length] |
238 | cmp eax, dword [ebp+FAT.Length] |
239 | ja .free_return0 |
239 | ja .free_return0 |
240 | @@: |
240 | @@: |
241 | mov dword [ebp+FAT.Length], eax |
241 | mov dword [ebp+FAT.Length], eax |
242 | and dword [ebp+FAT.Length+4], 0 |
242 | and dword [ebp+FAT.Length+4], 0 |
243 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
243 | sub eax, [ebp+FAT.DATA_START] ; eax = count of data sectors |
244 | jc .free_return0 |
244 | jc .free_return0 |
245 | xor edx, edx |
245 | xor edx, edx |
246 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
246 | div [ebp+FAT.SECTORS_PER_CLUSTER] |
247 | inc eax |
247 | inc eax |
248 | mov [ebp+FAT.LAST_CLUSTER], eax |
248 | mov [ebp+FAT.LAST_CLUSTER], eax |
249 | dec eax ; cluster count |
249 | dec eax ; cluster count |
250 | jz .free_return0 |
250 | jz .free_return0 |
251 | mov [ebp+FAT.fatStartScan], 2 |
251 | mov [ebp+FAT.fatStartScan], 2 |
252 | 252 | ||
253 | ; limits by Microsoft Hardware White Paper v1.03 |
253 | ; limits by Microsoft Hardware White Paper v1.03 |
254 | cmp eax, 4085 ; 0xff5 |
254 | cmp eax, 4085 ; 0xff5 |
255 | jb .fat12 |
255 | jb .fat12 |
256 | cmp eax, 65525 ; 0xfff5 |
256 | cmp eax, 65525 ; 0xfff5 |
257 | jb .fat16 |
257 | jb .fat16 |
258 | .fat32: |
258 | .fat32: |
259 | mov eax, [ebx+0x2c] ; rootdir cluster |
259 | mov eax, [ebx+0x2c] ; rootdir cluster |
260 | mov [ebp+FAT.ROOT_CLUSTER], eax |
260 | mov [ebp+FAT.ROOT_CLUSTER], eax |
261 | movzx eax, word [ebx+0x30] |
261 | movzx eax, word [ebx+0x30] |
262 | mov [ebp+FAT.ADR_FSINFO], eax |
262 | mov [ebp+FAT.ADR_FSINFO], eax |
263 | push ebx |
263 | push ebx |
264 | add ebx, 512 |
264 | add ebx, 512 |
265 | call fs_read32_sys |
265 | call fs_read32_sys |
266 | test eax, eax |
266 | test eax, eax |
267 | jnz @f |
267 | jnz @f |
268 | mov eax, [ebx+0x1ec] |
268 | mov eax, [ebx+0x1ec] |
269 | cmp eax, -1 |
269 | cmp eax, -1 |
270 | jz @f |
270 | jz @f |
271 | mov [ebp+FAT.fatStartScan], eax |
271 | mov [ebp+FAT.fatStartScan], eax |
272 | @@: |
272 | @@: |
273 | pop ebx |
273 | pop ebx |
274 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
274 | mov [ebp+FAT.fatRESERVED], 0x0FFFFFF6 |
275 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
275 | mov [ebp+FAT.fatBAD], 0x0FFFFFF7 |
276 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
276 | mov [ebp+FAT.fatEND], 0x0FFFFFF8 |
277 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
277 | mov [ebp+FAT.fatMASK], 0x0FFFFFFF |
278 | mov al, 32 |
278 | mov al, 32 |
279 | .fat_not_12_finalize: |
279 | .fat_not_12_finalize: |
280 | mov [ebp+FAT.fs_type], al |
280 | mov [ebp+FAT.fs_type], al |
281 | ; For FAT16 and FAT32, allocate 512 bytes for FAT cache. |
281 | ; For FAT16 and FAT32, allocate 512 bytes for FAT cache. |
282 | mov eax, 512 |
282 | mov eax, 512 |
283 | call malloc |
283 | call malloc |
284 | test eax, eax |
284 | test eax, eax |
285 | jz .free_return0 |
285 | jz .free_return0 |
286 | mov [ebp+FAT.fat_cache_ptr], eax |
286 | mov [ebp+FAT.fat_cache_ptr], eax |
287 | mov eax, ebp |
287 | mov eax, ebp |
288 | pop ebp |
288 | pop ebp |
289 | ret |
289 | ret |
290 | .fat16: |
290 | .fat16: |
291 | and [ebp+FAT.ROOT_CLUSTER], 0 |
291 | and [ebp+FAT.ROOT_CLUSTER], 0 |
292 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
292 | mov [ebp+FAT.fatRESERVED], 0x0000FFF6 |
293 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
293 | mov [ebp+FAT.fatBAD], 0x0000FFF7 |
294 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
294 | mov [ebp+FAT.fatEND], 0x0000FFF8 |
295 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
295 | mov [ebp+FAT.fatMASK], 0x0000FFFF |
296 | mov al, 16 |
296 | mov al, 16 |
297 | jmp .fat_not_12_finalize |
297 | jmp .fat_not_12_finalize |
298 | .fat12: |
298 | .fat12: |
299 | and [ebp+FAT.ROOT_CLUSTER], 0 |
299 | and [ebp+FAT.ROOT_CLUSTER], 0 |
300 | mov [ebp+FAT.fatRESERVED], 0xFF6 |
300 | mov [ebp+FAT.fatRESERVED], 0xFF6 |
301 | mov [ebp+FAT.fatBAD], 0xFF7 |
301 | mov [ebp+FAT.fatBAD], 0xFF7 |
302 | mov [ebp+FAT.fatEND], 0xFFF |
302 | mov [ebp+FAT.fatEND], 0xFFF |
303 | mov [ebp+FAT.fatMASK], 0xFFF |
303 | mov [ebp+FAT.fatMASK], 0xFFF |
304 | mov al, 12 |
304 | mov al, 12 |
305 | mov [ebp+FAT.fs_type], al |
305 | mov [ebp+FAT.fs_type], al |
306 | ; For FAT12, allocate&read data for entire table: |
306 | ; For FAT12, allocate&read data for entire table: |
307 | ; calculate A = ALIGN_UP(NUM_CLUSTERS, 8), |
307 | ; calculate A = ALIGN_UP(NUM_CLUSTERS, 8), |
308 | ; calculatefatchain/restorefatchain will process A items, |
308 | ; calculatefatchain/restorefatchain will process A items, |
309 | ; allocate ALIGN_UP(A*3/2, 512) bytes for FAT table plus A*2 bytes for unpacked data. |
309 | ; allocate ALIGN_UP(A*3/2, 512) bytes for FAT table plus A*2 bytes for unpacked data. |
310 | mov eax, [ebp+FAT.LAST_CLUSTER] |
310 | mov eax, [ebp+FAT.LAST_CLUSTER] |
311 | and eax, not 7 |
311 | and eax, not 7 |
312 | add eax, 8 |
312 | add eax, 8 |
313 | mov edx, eax |
313 | mov edx, eax |
314 | lea eax, [eax*3] |
314 | lea eax, [eax*3] |
315 | add eax, 512*2-1 |
315 | add eax, 512*2-1 |
316 | shr eax, 10 |
316 | shr eax, 10 |
317 | shl eax, 9 |
317 | shl eax, 9 |
318 | lea eax, [eax+edx*2] |
318 | lea eax, [eax+edx*2] |
319 | call malloc |
319 | call malloc |
320 | test eax, eax |
320 | test eax, eax |
321 | jz .free_return0 |
321 | jz .free_return0 |
322 | ; Read ALIGN_UP(NUM_CLUSTERS*3/2, 512) bytes. |
322 | ; Read ALIGN_UP(NUM_CLUSTERS*3/2, 512) bytes. |
323 | ; Note that this can be less than allocated, this is ok, |
323 | ; Note that this can be less than allocated, this is ok, |
324 | ; overallocation simplifies calculatefatchain/restorefatchain. |
324 | ; overallocation simplifies calculatefatchain/restorefatchain. |
325 | push ebx |
325 | push ebx |
326 | mov [ebp+FAT.fat_cache_ptr], eax |
326 | mov [ebp+FAT.fat_cache_ptr], eax |
327 | mov edx, [ebp+FAT.LAST_CLUSTER] |
327 | mov edx, [ebp+FAT.LAST_CLUSTER] |
328 | lea edx, [(edx+1)*3 + 512*2-1] |
328 | lea edx, [(edx+1)*3 + 512*2-1] |
329 | shr edx, 10 |
329 | shr edx, 10 |
330 | xchg eax, ebx |
330 | xchg eax, ebx |
331 | xor eax, eax |
331 | xor eax, eax |
332 | .read_fat: |
332 | .read_fat: |
333 | push eax |
333 | push eax |
334 | add eax, [ebp+FAT.FAT_START] |
334 | add eax, [ebp+FAT.FAT_START] |
335 | call fs_read32_sys |
335 | call fs_read32_sys |
336 | test eax, eax |
336 | test eax, eax |
337 | pop eax |
337 | pop eax |
338 | jz @f |
338 | jz @f |
339 | dbgstr 'Failed to read FAT table' |
339 | dbgstr 'Failed to read FAT table' |
340 | mov eax, [ebp+FAT.fat_cache_ptr] |
340 | mov eax, [ebp+FAT.fat_cache_ptr] |
341 | call free |
341 | call free |
342 | pop ebx |
342 | pop ebx |
343 | jmp .free_return0 |
343 | jmp .free_return0 |
344 | @@: |
344 | @@: |
345 | add ebx, 512 |
345 | add ebx, 512 |
346 | inc eax |
346 | inc eax |
347 | cmp eax, edx |
347 | cmp eax, edx |
348 | jb .read_fat |
348 | jb .read_fat |
349 | mov [ebp+FAT.fat12_unpacked_ptr], ebx |
349 | mov [ebp+FAT.fat12_unpacked_ptr], ebx |
350 | call calculatefatchain |
350 | call calculatefatchain |
351 | pop ebx |
351 | pop ebx |
352 | mov eax, ebp |
352 | mov eax, ebp |
353 | pop ebp |
353 | pop ebp |
354 | ret |
354 | ret |
355 | 355 | ||
356 | fat_free: |
356 | fat_free: |
357 | push eax |
357 | push eax |
358 | mov eax, [eax+FAT.fat_cache_ptr] |
358 | mov eax, [eax+FAT.fat_cache_ptr] |
359 | call free |
359 | call free |
360 | pop eax |
360 | pop eax |
361 | jmp free |
361 | jmp free |
362 | 362 | ||
363 | calculatefatchain: |
363 | calculatefatchain: |
364 | 364 | ||
365 | pushad |
365 | pushad |
366 | 366 | ||
367 | mov esi, [ebp+FAT.fat_cache_ptr] |
367 | mov esi, [ebp+FAT.fat_cache_ptr] |
368 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
368 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
369 | 369 | ||
370 | mov edx, [ebp+FAT.LAST_CLUSTER] |
370 | mov edx, [ebp+FAT.LAST_CLUSTER] |
371 | and edx, not 7 |
371 | and edx, not 7 |
372 | lea edx, [edi+(edx+8)*2] |
372 | lea edx, [edi+(edx+8)*2] |
373 | push edx |
373 | push edx |
374 | 374 | ||
375 | fcnew: |
375 | fcnew: |
376 | mov eax, dword [esi] |
376 | mov eax, dword [esi] |
377 | mov ebx, dword [esi+4] |
377 | mov ebx, dword [esi+4] |
378 | mov ecx, dword [esi+8] |
378 | mov ecx, dword [esi+8] |
379 | mov edx, ecx |
379 | mov edx, ecx |
380 | shr edx, 4;8 ok |
380 | shr edx, 4;8 ok |
381 | shr dx, 4;7 ok |
381 | shr dx, 4;7 ok |
382 | xor ch, ch |
382 | xor ch, ch |
383 | shld ecx, ebx, 20;6 ok |
383 | shld ecx, ebx, 20;6 ok |
384 | shr cx, 4;5 ok |
384 | shr cx, 4;5 ok |
385 | shld ebx, eax, 12 |
385 | shld ebx, eax, 12 |
386 | and ebx, 0x0fffffff;4 ok |
386 | and ebx, 0x0fffffff;4 ok |
387 | shr bx, 4;3 ok |
387 | shr bx, 4;3 ok |
388 | shl eax, 4 |
388 | shl eax, 4 |
389 | and eax, 0x0fffffff;2 ok |
389 | and eax, 0x0fffffff;2 ok |
390 | shr ax, 4;1 ok |
390 | shr ax, 4;1 ok |
391 | mov dword [edi], eax |
391 | mov dword [edi], eax |
392 | mov dword [edi+4], ebx |
392 | mov dword [edi+4], ebx |
393 | mov dword [edi+8], ecx |
393 | mov dword [edi+8], ecx |
394 | mov dword [edi+12], edx |
394 | mov dword [edi+12], edx |
395 | add edi, 16 |
395 | add edi, 16 |
396 | add esi, 12 |
396 | add esi, 12 |
397 | 397 | ||
398 | cmp edi, [esp] |
398 | cmp edi, [esp] |
399 | jnz fcnew |
399 | jnz fcnew |
400 | pop eax |
400 | pop eax |
401 | 401 | ||
402 | popad |
402 | popad |
403 | ret |
403 | ret |
404 | 404 | ||
405 | 405 | ||
406 | restorefatchain: ; restore fat chain |
406 | restorefatchain: ; restore fat chain |
407 | 407 | ||
408 | pushad |
408 | pushad |
409 | 409 | ||
410 | mov esi, [ebp+FAT.fat12_unpacked_ptr] |
410 | mov esi, [ebp+FAT.fat12_unpacked_ptr] |
411 | mov edi, [ebp+FAT.fat_cache_ptr] |
411 | mov edi, [ebp+FAT.fat_cache_ptr] |
412 | 412 | ||
413 | mov edx, [ebp+FAT.LAST_CLUSTER] |
413 | mov edx, [ebp+FAT.LAST_CLUSTER] |
414 | and edx, not 7 |
414 | and edx, not 7 |
415 | lea edx, [esi+(edx+8)*2] |
415 | lea edx, [esi+(edx+8)*2] |
416 | 416 | ||
417 | fcnew2: |
417 | fcnew2: |
418 | mov eax, dword [esi] |
418 | mov eax, dword [esi] |
419 | mov ebx, dword [esi+4] |
419 | mov ebx, dword [esi+4] |
420 | shl ax, 4 |
420 | shl ax, 4 |
421 | shl eax, 4 |
421 | shl eax, 4 |
422 | shl bx, 4 |
422 | shl bx, 4 |
423 | shr ebx, 4 |
423 | shr ebx, 4 |
424 | shrd eax, ebx, 8 |
424 | shrd eax, ebx, 8 |
425 | shr ebx, 8 |
425 | shr ebx, 8 |
426 | mov dword [edi], eax |
426 | mov dword [edi], eax |
427 | mov word [edi+4], bx |
427 | mov word [edi+4], bx |
428 | add edi, 6 |
428 | add edi, 6 |
429 | add esi, 8 |
429 | add esi, 8 |
430 | 430 | ||
431 | cmp esi, edx |
431 | cmp esi, edx |
432 | jb fcnew2 |
432 | jb fcnew2 |
433 | 433 | ||
434 | mov esi, [ebp+FAT.NUMBER_OF_FATS] |
434 | mov esi, [ebp+FAT.NUMBER_OF_FATS] |
435 | mov edx, [ebp+FAT.LAST_CLUSTER] |
435 | mov edx, [ebp+FAT.LAST_CLUSTER] |
436 | lea edx, [(edx+1)*3 + 512*2-1] |
436 | lea edx, [(edx+1)*3 + 512*2-1] |
437 | shr edx, 10 |
437 | shr edx, 10 |
438 | push [ebp+FAT.FAT_START] |
438 | push [ebp+FAT.FAT_START] |
439 | 439 | ||
440 | .write_fats: |
440 | .write_fats: |
441 | xor eax, eax |
441 | xor eax, eax |
442 | mov ebx, [ebp+FAT.fat_cache_ptr] |
442 | mov ebx, [ebp+FAT.fat_cache_ptr] |
443 | .loop1: |
443 | .loop1: |
444 | push eax |
444 | push eax |
445 | add eax, [esp+4] |
445 | add eax, [esp+4] |
446 | call fs_write32_sys |
446 | call fs_write32_sys |
447 | test eax, eax |
447 | test eax, eax |
448 | pop eax |
448 | pop eax |
449 | jnz .fail |
449 | jnz .fail |
450 | add ebx, 512 |
450 | add ebx, 512 |
451 | inc eax |
451 | inc eax |
452 | cmp eax, edx |
452 | cmp eax, edx |
453 | jb .loop1 |
453 | jb .loop1 |
454 | pop eax |
454 | pop eax |
455 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
455 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
456 | push eax |
456 | push eax |
457 | dec esi |
457 | dec esi |
458 | jnz .write_fats |
458 | jnz .write_fats |
459 | pop eax |
459 | pop eax |
460 | 460 | ||
461 | popad |
461 | popad |
462 | ret |
462 | ret |
463 | .fail: |
463 | .fail: |
464 | dbgstr 'Failed to save FAT' |
464 | dbgstr 'Failed to save FAT' |
465 | popad |
465 | popad |
466 | ret |
466 | ret |
467 | 467 | ||
468 | iglobal |
468 | iglobal |
469 | label fat_legal_chars byte |
469 | label fat_legal_chars byte |
470 | ; 0 = not allowed |
470 | ; 0 = not allowed |
471 | ; 1 = allowed only in long names |
471 | ; 1 = allowed only in long names |
472 | ; 3 = allowed |
472 | ; 3 = allowed |
473 | times 32 db 0 |
473 | times 32 db 0 |
474 | ; ! " # $ % & ' ( ) * + , - . / |
474 | ; ! " # $ % & ' ( ) * + , - . / |
475 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
475 | db 1,3,0,3,3,3,3,3,3,3,0,1,1,3,3,0 |
476 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
476 | ; 0 1 2 3 4 5 6 7 8 9 : ; < = > ? |
477 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
477 | db 3,3,3,3,3,3,3,3,3,3,0,1,0,1,0,0 |
478 | ; @ A B C D E F G H I J K L M N O |
478 | ; @ A B C D E F G H I J K L M N O |
479 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
479 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
480 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
480 | ; P Q R S T U V W X Y Z [ \ ] ^ _ |
481 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
481 | db 3,3,3,3,3,3,3,3,3,3,3,1,0,1,3,3 |
482 | ; ` a b c d e f g h i j k l m n o |
482 | ; ` a b c d e f g h i j k l m n o |
483 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
483 | db 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 |
484 | ; p q r s t u v w x y z { | } ~ |
484 | ; p q r s t u v w x y z { | } ~ |
485 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
485 | db 3,3,3,3,3,3,3,3,3,3,3,3,0,3,3,0 |
486 | endg |
486 | endg |
487 | 487 | ||
488 | fat_name_is_legal: |
488 | fat_name_is_legal: |
489 | ; in: esi->(long) name |
489 | ; in: esi->(long) name |
490 | ; out: CF set <=> legal |
490 | ; out: CF set <=> legal |
491 | ; destroys eax |
491 | ; destroys eax |
492 | push esi |
492 | push esi |
493 | xor eax, eax |
493 | xor eax, eax |
494 | @@: |
494 | @@: |
495 | lodsb |
495 | lodsb |
496 | test al, al |
496 | test al, al |
497 | jz .done |
497 | jz .done |
498 | cmp al, 80h |
498 | cmp al, 80h |
499 | jae .big |
499 | jae .big |
500 | test [fat_legal_chars+eax], 1 |
500 | test [fat_legal_chars+eax], 1 |
501 | jnz @b |
501 | jnz @b |
502 | .err: |
502 | .err: |
503 | pop esi |
503 | pop esi |
504 | clc |
504 | clc |
505 | ret |
505 | ret |
506 | .big: |
506 | .big: |
507 | ; 0x80-0xAF, 0xE0-0xEF |
507 | ; 0x80-0xAF, 0xE0-0xEF |
508 | cmp al, 0xB0 |
508 | cmp al, 0xB0 |
509 | jb @b |
509 | jb @b |
510 | cmp al, 0xE0 |
510 | cmp al, 0xE0 |
511 | jb .err |
511 | jb .err |
512 | cmp al, 0xF0 |
512 | cmp al, 0xF0 |
513 | jb @b |
513 | jb @b |
514 | jmp .err |
514 | jmp .err |
515 | .done: |
515 | .done: |
516 | sub esi, [esp] |
516 | sub esi, [esp] |
517 | cmp esi, 257 |
517 | cmp esi, 257 |
518 | pop esi |
518 | pop esi |
519 | ret |
519 | ret |
520 | 520 | ||
521 | fat_next_short_name: |
521 | fat_next_short_name: |
522 | ; in: edi->8+3 name |
522 | ; in: edi->8+3 name |
523 | ; out: name corrected |
523 | ; out: name corrected |
524 | ; CF=1 <=> error |
524 | ; CF=1 <=> error |
525 | pushad |
525 | pushad |
526 | mov ecx, 8 |
526 | mov ecx, 8 |
527 | mov al, '~' |
527 | mov al, '~' |
528 | std |
528 | std |
529 | push edi |
529 | push edi |
530 | add edi, 7 |
530 | add edi, 7 |
531 | repnz scasb |
531 | repnz scasb |
532 | pop edi |
532 | pop edi |
533 | cld |
533 | cld |
534 | jz .tilde |
534 | jz .tilde |
535 | ; tilde is not found, insert "~1" at end |
535 | ; tilde is not found, insert "~1" at end |
536 | add edi, 6 |
536 | add edi, 6 |
537 | cmp word [edi], ' ' |
537 | cmp word [edi], ' ' |
538 | jnz .insert_tilde |
538 | jnz .insert_tilde |
539 | @@: |
539 | @@: |
540 | dec edi |
540 | dec edi |
541 | cmp byte [edi], ' ' |
541 | cmp byte [edi], ' ' |
542 | jz @b |
542 | jz @b |
543 | inc edi |
543 | inc edi |
544 | .insert_tilde: |
544 | .insert_tilde: |
545 | mov word [edi], '~1' |
545 | mov word [edi], '~1' |
546 | popad |
546 | popad |
547 | clc |
547 | clc |
548 | ret |
548 | ret |
549 | .tilde: |
549 | .tilde: |
550 | push edi |
550 | push edi |
551 | add edi, 7 |
551 | add edi, 7 |
552 | xor ecx, ecx |
552 | xor ecx, ecx |
553 | @@: |
553 | @@: |
554 | ; after tilde may be only digits and trailing spaces |
554 | ; after tilde may be only digits and trailing spaces |
555 | cmp byte [edi], '~' |
555 | cmp byte [edi], '~' |
556 | jz .break |
556 | jz .break |
557 | cmp byte [edi], ' ' |
557 | cmp byte [edi], ' ' |
558 | jz .space |
558 | jz .space |
559 | cmp byte [edi], '9' |
559 | cmp byte [edi], '9' |
560 | jnz .found |
560 | jnz .found |
561 | dec edi |
561 | dec edi |
562 | jmp @b |
562 | jmp @b |
563 | .space: |
563 | .space: |
564 | dec edi |
564 | dec edi |
565 | inc ecx |
565 | inc ecx |
566 | jmp @b |
566 | jmp @b |
567 | .found: |
567 | .found: |
568 | inc byte [edi] |
568 | inc byte [edi] |
569 | add dword [esp], 8 |
569 | add dword [esp], 8 |
570 | jmp .zerorest |
570 | jmp .zerorest |
571 | .break: |
571 | .break: |
572 | jecxz .noplace |
572 | jecxz .noplace |
573 | inc edi |
573 | inc edi |
574 | mov al, '1' |
574 | mov al, '1' |
575 | @@: |
575 | @@: |
576 | xchg al, [edi] |
576 | xchg al, [edi] |
577 | inc edi |
577 | inc edi |
578 | cmp al, ' ' |
578 | cmp al, ' ' |
579 | mov al, '0' |
579 | mov al, '0' |
580 | jnz @b |
580 | jnz @b |
581 | .succ: |
581 | .succ: |
582 | pop edi |
582 | pop edi |
583 | popad |
583 | popad |
584 | clc |
584 | clc |
585 | ret |
585 | ret |
586 | .noplace: |
586 | .noplace: |
587 | dec edi |
587 | dec edi |
588 | cmp edi, [esp] |
588 | cmp edi, [esp] |
589 | jz .err |
589 | jz .err |
590 | add dword [esp], 8 |
590 | add dword [esp], 8 |
591 | mov word [edi], '~1' |
591 | mov word [edi], '~1' |
592 | inc edi |
592 | inc edi |
593 | inc edi |
593 | inc edi |
594 | @@: |
594 | @@: |
595 | mov byte [edi], '0' |
595 | mov byte [edi], '0' |
596 | .zerorest: |
596 | .zerorest: |
597 | inc edi |
597 | inc edi |
598 | cmp edi, [esp] |
598 | cmp edi, [esp] |
599 | jb @b |
599 | jb @b |
600 | pop edi |
600 | pop edi |
601 | popad |
601 | popad |
602 | ;clc ; automatically |
602 | ;clc ; automatically |
603 | ret |
603 | ret |
604 | .err: |
604 | .err: |
605 | pop edi |
605 | pop edi |
606 | popad |
606 | popad |
607 | stc |
607 | stc |
608 | ret |
608 | ret |
609 | 609 | ||
610 | fat_gen_short_name: |
610 | fat_gen_short_name: |
611 | ; in: esi->long name |
611 | ; in: esi->long name |
612 | ; edi->buffer (8+3=11 chars) |
612 | ; edi->buffer (8+3=11 chars) |
613 | ; out: buffer filled |
613 | ; out: buffer filled |
614 | pushad |
614 | pushad |
615 | mov eax, ' ' |
615 | mov eax, ' ' |
616 | push edi |
616 | push edi |
617 | stosd |
617 | stosd |
618 | stosd |
618 | stosd |
619 | stosd |
619 | stosd |
620 | pop edi |
620 | pop edi |
621 | xor eax, eax |
621 | xor eax, eax |
622 | movi ebx, 8 |
622 | movi ebx, 8 |
623 | lea ecx, [edi+8] |
623 | lea ecx, [edi+8] |
624 | .loop: |
624 | .loop: |
625 | lodsb |
625 | lodsb |
626 | test al, al |
626 | test al, al |
627 | jz .done |
627 | jz .done |
628 | call char_toupper |
628 | call char_toupper |
629 | cmp al, ' ' |
629 | cmp al, ' ' |
630 | jz .space |
630 | jz .space |
631 | cmp al, 80h |
631 | cmp al, 80h |
632 | ja .big |
632 | ja .big |
633 | test [fat_legal_chars+eax], 2 |
633 | test [fat_legal_chars+eax], 2 |
634 | jnz .symbol |
634 | jnz .symbol |
635 | .inv_symbol: |
635 | .inv_symbol: |
636 | mov al, '_' |
636 | mov al, '_' |
637 | or bh, 1 |
637 | or bh, 1 |
638 | .symbol: |
638 | .symbol: |
639 | cmp al, '.' |
639 | cmp al, '.' |
640 | jz .dot |
640 | jz .dot |
641 | .normal_symbol: |
641 | .normal_symbol: |
642 | dec bl |
642 | dec bl |
643 | jns .store |
643 | jns .store |
644 | mov bl, 0 |
644 | mov bl, 0 |
645 | .space: |
645 | .space: |
646 | or bh, 1 |
646 | or bh, 1 |
647 | jmp .loop |
647 | jmp .loop |
648 | .store: |
648 | .store: |
649 | stosb |
649 | stosb |
650 | jmp .loop |
650 | jmp .loop |
651 | .big: |
651 | .big: |
652 | cmp al, 0xB0 |
652 | cmp al, 0xB0 |
653 | jb .normal_symbol |
653 | jb .normal_symbol |
654 | cmp al, 0xE0 |
654 | cmp al, 0xE0 |
655 | jb .inv_symbol |
655 | jb .inv_symbol |
656 | cmp al, 0xF0 |
656 | cmp al, 0xF0 |
657 | jb .normal_symbol |
657 | jb .normal_symbol |
658 | jmp .inv_symbol |
658 | jmp .inv_symbol |
659 | .dot: |
659 | .dot: |
660 | test bh, 2 |
660 | test bh, 2 |
661 | jz .firstdot |
661 | jz .firstdot |
662 | pop ebx |
662 | pop ebx |
663 | add ebx, edi |
663 | add ebx, edi |
664 | sub ebx, ecx |
664 | sub ebx, ecx |
665 | push ebx |
665 | push ebx |
666 | cmp ebx, ecx |
666 | cmp ebx, ecx |
667 | jb @f |
667 | jb @f |
668 | pop ebx |
668 | pop ebx |
669 | push ecx |
669 | push ecx |
670 | @@: |
670 | @@: |
671 | cmp edi, ecx |
671 | cmp edi, ecx |
672 | jbe .skip |
672 | jbe .skip |
673 | @@: |
673 | @@: |
674 | dec edi |
674 | dec edi |
675 | mov al, [edi] |
675 | mov al, [edi] |
676 | dec ebx |
676 | dec ebx |
677 | mov [ebx], al |
677 | mov [ebx], al |
678 | mov byte [edi], ' ' |
678 | mov byte [edi], ' ' |
679 | cmp edi, ecx |
679 | cmp edi, ecx |
680 | ja @b |
680 | ja @b |
681 | .skip: |
681 | .skip: |
682 | mov bh, 3 |
682 | mov bh, 3 |
683 | jmp @f |
683 | jmp @f |
684 | .firstdot: |
684 | .firstdot: |
685 | cmp bl, 8 |
685 | cmp bl, 8 |
686 | jz .space |
686 | jz .space |
687 | push edi |
687 | push edi |
688 | or bh, 2 |
688 | or bh, 2 |
689 | @@: |
689 | @@: |
690 | mov edi, ecx |
690 | mov edi, ecx |
691 | mov bl, 3 |
691 | mov bl, 3 |
692 | jmp .loop |
692 | jmp .loop |
693 | .done: |
693 | .done: |
694 | test bh, 2 |
694 | test bh, 2 |
695 | jz @f |
695 | jz @f |
696 | pop edi |
696 | pop edi |
697 | @@: |
697 | @@: |
698 | lea edi, [ecx-8] |
698 | lea edi, [ecx-8] |
699 | test bh, 1 |
699 | test bh, 1 |
700 | jz @f |
700 | jz @f |
701 | call fat_next_short_name |
701 | call fat_next_short_name |
702 | @@: |
702 | @@: |
703 | popad |
703 | popad |
704 | ret |
704 | ret |
705 | 705 | ||
706 | fat12_free_space: |
706 | fat12_free_space: |
707 | ;--------------------------------------------- |
707 | ;--------------------------------------------- |
708 | ; |
708 | ; |
709 | ; returns free space in edi |
709 | ; returns free space in edi |
710 | ; rewr.by Mihasik |
710 | ; rewr.by Mihasik |
711 | ;--------------------------------------------- |
711 | ;--------------------------------------------- |
712 | 712 | ||
713 | push eax ebx ecx |
713 | push eax ebx ecx |
714 | 714 | ||
715 | mov edi, [ebp+FAT.fat12_unpacked_ptr];start of FAT |
715 | mov edi, [ebp+FAT.fat12_unpacked_ptr];start of FAT |
716 | xor ax, ax;Free cluster=0x0000 in FAT |
716 | xor ax, ax;Free cluster=0x0000 in FAT |
717 | xor ebx, ebx;counter |
717 | xor ebx, ebx;counter |
718 | mov ecx, [ebp+FAT.LAST_CLUSTER] |
718 | mov ecx, [ebp+FAT.LAST_CLUSTER] |
719 | inc ecx |
719 | inc ecx |
720 | cld |
720 | cld |
721 | rdfs1: |
721 | rdfs1: |
722 | repne scasw |
722 | repne scasw |
723 | jnz rdfs2 ;if last cluster not 0 |
723 | jnz rdfs2 ;if last cluster not 0 |
724 | inc ebx |
724 | inc ebx |
725 | test ecx, ecx |
725 | test ecx, ecx |
726 | jnz rdfs1 |
726 | jnz rdfs1 |
727 | rdfs2: |
727 | rdfs2: |
728 | shl ebx, 9;free clusters*512 |
728 | shl ebx, 9;free clusters*512 |
729 | mov edi, ebx |
729 | mov edi, ebx |
730 | 730 | ||
731 | pop ecx ebx eax |
731 | pop ecx ebx eax |
732 | ret |
732 | ret |
733 | 733 | ||
734 | 734 | ||
735 | 735 | ||
736 | set_FAT: |
736 | set_FAT: |
737 | ;-------------------------------- |
737 | ;-------------------------------- |
738 | ; input : EAX = cluster |
738 | ; input : EAX = cluster |
739 | ; EDX = value to save |
739 | ; EDX = value to save |
740 | ; EBP = pointer to FAT structure |
740 | ; EBP = pointer to FAT structure |
741 | ; output : EDX = old value |
741 | ; output : EDX = old value |
742 | ;-------------------------------- |
742 | ;-------------------------------- |
743 | ; out: CF set <=> error |
743 | ; out: CF set <=> error |
744 | push eax ebx esi |
744 | push eax ebx esi |
745 | 745 | ||
746 | cmp eax, 2 |
746 | cmp eax, 2 |
747 | jb sfc_error |
747 | jb sfc_error |
748 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
748 | cmp eax, [ebp+FAT.LAST_CLUSTER] |
749 | ja sfc_error |
749 | ja sfc_error |
750 | cmp [ebp+FAT.fs_type], 12 |
750 | cmp [ebp+FAT.fs_type], 12 |
751 | je set_FAT12 |
751 | je set_FAT12 |
752 | cmp [ebp+FAT.fs_type], 16 |
752 | cmp [ebp+FAT.fs_type], 16 |
753 | je sfc_1 |
753 | je sfc_1 |
754 | add eax, eax |
754 | add eax, eax |
755 | sfc_1: |
755 | sfc_1: |
756 | add eax, eax |
756 | add eax, eax |
757 | mov esi, 511 |
757 | mov esi, 511 |
758 | and esi, eax ; esi = position in fat sector |
758 | and esi, eax ; esi = position in fat sector |
759 | shr eax, 9 ; eax = fat sector |
759 | shr eax, 9 ; eax = fat sector |
760 | add eax, [ebp+FAT.FAT_START] |
760 | add eax, [ebp+FAT.FAT_START] |
761 | mov ebx, [ebp+FAT.fat_cache_ptr] |
761 | mov ebx, [ebp+FAT.fat_cache_ptr] |
762 | 762 | ||
763 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
763 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
764 | je sfc_in_cache ; yes |
764 | je sfc_in_cache ; yes |
765 | 765 | ||
766 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
766 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
767 | je sfc_no_change ; no |
767 | je sfc_no_change ; no |
768 | call write_fat_sector; yes. write it into disk |
768 | call write_fat_sector; yes. write it into disk |
769 | jc sfc_error |
769 | jc sfc_error |
770 | 770 | ||
771 | sfc_no_change: |
771 | sfc_no_change: |
772 | mov [ebp+FAT.fat_in_cache], eax; save fat sector |
772 | mov [ebp+FAT.fat_in_cache], eax; save fat sector |
773 | call fs_read32_sys |
773 | call fs_read32_sys |
774 | test eax, eax |
774 | test eax, eax |
775 | jne sfc_error |
775 | jne sfc_error |
776 | 776 | ||
777 | 777 | ||
778 | sfc_in_cache: |
778 | sfc_in_cache: |
779 | cmp [ebp+FAT.fs_type], 16 |
779 | cmp [ebp+FAT.fs_type], 16 |
780 | jne sfc_test32 |
780 | jne sfc_test32 |
781 | 781 | ||
782 | sfc_set16: |
782 | sfc_set16: |
783 | xchg [ebx+esi], dx ; save new value and get old value |
783 | xchg [ebx+esi], dx ; save new value and get old value |
784 | jmp sfc_write |
784 | jmp sfc_write |
785 | 785 | ||
786 | sfc_test32: |
786 | sfc_test32: |
787 | mov eax, [ebp+FAT.fatMASK] |
787 | mov eax, [ebp+FAT.fatMASK] |
788 | 788 | ||
789 | sfc_set32: |
789 | sfc_set32: |
790 | and edx, eax |
790 | and edx, eax |
791 | xor eax, -1 ; mask for high bits |
791 | xor eax, -1 ; mask for high bits |
792 | and eax, [ebx+esi] ; get high 4 bits |
792 | and eax, [ebx+esi] ; get high 4 bits |
793 | or eax, edx |
793 | or eax, edx |
794 | mov edx, [ebx+esi] ; get old value |
794 | mov edx, [ebx+esi] ; get old value |
795 | mov [ebx+esi], eax ; save new value |
795 | mov [ebx+esi], eax ; save new value |
796 | 796 | ||
797 | sfc_write: |
797 | sfc_write: |
798 | mov [ebp+FAT.fat_change], 1; fat has changed |
798 | mov [ebp+FAT.fat_change], 1; fat has changed |
799 | 799 | ||
800 | sfc_nonzero: |
800 | sfc_nonzero: |
801 | and edx, [ebp+FAT.fatMASK] |
801 | and edx, [ebp+FAT.fatMASK] |
802 | 802 | ||
803 | sfc_return: |
803 | sfc_return: |
804 | pop esi ebx eax |
804 | pop esi ebx eax |
805 | ret |
805 | ret |
806 | sfc_error: |
806 | sfc_error: |
807 | stc |
807 | stc |
808 | jmp sfc_return |
808 | jmp sfc_return |
809 | 809 | ||
810 | set_FAT12: |
810 | set_FAT12: |
811 | test edx, 0xF000 |
811 | test edx, 0xF000 |
812 | jnz sfc_error |
812 | jnz sfc_error |
813 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
813 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
814 | xchg [ebx+eax*2], dx |
814 | xchg [ebx+eax*2], dx |
815 | mov [ebp+FAT.fat_change], 1 |
815 | mov [ebp+FAT.fat_change], 1 |
816 | pop esi ebx eax |
816 | pop esi ebx eax |
817 | clc |
817 | clc |
818 | ret |
818 | ret |
819 | 819 | ||
820 | get_FAT: |
820 | get_FAT: |
821 | ;-------------------------------- |
821 | ;-------------------------------- |
822 | ; input : EAX = cluster |
822 | ; input : EAX = cluster |
823 | ; EBP = pointer to FAT structure |
823 | ; EBP = pointer to FAT structure |
824 | ; output : EAX = next cluster |
824 | ; output : EAX = next cluster |
825 | ;-------------------------------- |
825 | ;-------------------------------- |
826 | ; out: CF set <=> error |
826 | ; out: CF set <=> error |
827 | push ebx esi |
827 | push ebx esi |
828 | 828 | ||
829 | cmp [ebp+FAT.fs_type], 12 |
829 | cmp [ebp+FAT.fs_type], 12 |
830 | je get_FAT12 |
830 | je get_FAT12 |
831 | 831 | ||
832 | cmp [ebp+FAT.fs_type], 16 |
832 | cmp [ebp+FAT.fs_type], 16 |
833 | je gfc_1 |
833 | je gfc_1 |
834 | add eax, eax |
834 | add eax, eax |
835 | gfc_1: |
835 | gfc_1: |
836 | add eax, eax |
836 | add eax, eax |
837 | mov esi, 511 |
837 | mov esi, 511 |
838 | and esi, eax ; esi = position in fat sector |
838 | and esi, eax ; esi = position in fat sector |
839 | shr eax, 9 ; eax = fat sector |
839 | shr eax, 9 ; eax = fat sector |
840 | add eax, [ebp+FAT.FAT_START] |
840 | add eax, [ebp+FAT.FAT_START] |
841 | mov ebx, [ebp+FAT.fat_cache_ptr] |
841 | mov ebx, [ebp+FAT.fat_cache_ptr] |
842 | 842 | ||
843 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
843 | cmp eax, [ebp+FAT.fat_in_cache]; is fat sector already in memory? |
844 | je gfc_in_cache |
844 | je gfc_in_cache |
845 | 845 | ||
846 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
846 | cmp [ebp+FAT.fat_change], 0; is fat changed? |
847 | je gfc_no_change ; no |
847 | je gfc_no_change ; no |
848 | call write_fat_sector; yes. write it into disk |
848 | call write_fat_sector; yes. write it into disk |
849 | jc hd_error_01 |
849 | jc hd_error_01 |
850 | 850 | ||
851 | gfc_no_change: |
851 | gfc_no_change: |
852 | mov [ebp+FAT.fat_in_cache], eax |
852 | mov [ebp+FAT.fat_in_cache], eax |
853 | call fs_read32_sys |
853 | call fs_read32_sys |
854 | test eax, eax |
854 | test eax, eax |
855 | jne hd_error_01 |
855 | jne hd_error_01 |
856 | 856 | ||
857 | gfc_in_cache: |
857 | gfc_in_cache: |
858 | mov eax, [ebx+esi] |
858 | mov eax, [ebx+esi] |
859 | and eax, [ebp+FAT.fatMASK] |
859 | and eax, [ebp+FAT.fatMASK] |
860 | gfc_return: |
860 | gfc_return: |
861 | pop esi ebx |
861 | pop esi ebx |
862 | ret |
862 | ret |
863 | hd_error_01: |
863 | hd_error_01: |
864 | stc |
864 | stc |
865 | jmp gfc_return |
865 | jmp gfc_return |
866 | 866 | ||
867 | get_FAT12: |
867 | get_FAT12: |
868 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
868 | mov ebx, [ebp+FAT.fat12_unpacked_ptr] |
869 | movzx eax, word [ebx+eax*2] |
869 | movzx eax, word [ebx+eax*2] |
870 | pop esi ebx |
870 | pop esi ebx |
871 | clc |
871 | clc |
872 | ret |
872 | ret |
873 | 873 | ||
874 | 874 | ||
875 | get_free_FAT: |
875 | get_free_FAT: |
876 | ;----------------------------------------------------------- |
876 | ;----------------------------------------------------------- |
877 | ; output : if CARRY=0 EAX = # first cluster found free |
877 | ; output : if CARRY=0 EAX = # first cluster found free |
878 | ; if CARRY=1 disk full |
878 | ; if CARRY=1 disk full |
879 | ; Note : for more speed need to use fat_cache directly |
879 | ; Note : for more speed need to use fat_cache directly |
880 | ;----------------------------------------------------------- |
880 | ;----------------------------------------------------------- |
881 | push ecx |
881 | push ecx |
882 | mov ecx, [ebp+FAT.LAST_CLUSTER]; counter for full disk |
882 | mov ecx, [ebp+FAT.LAST_CLUSTER]; counter for full disk |
883 | mov eax, [ebp+FAT.fatStartScan] |
883 | mov eax, [ebp+FAT.fatStartScan] |
884 | cmp [ebp+FAT.fs_type], 12 |
884 | cmp [ebp+FAT.fs_type], 12 |
885 | jz get_free_FAT12 |
885 | jz get_free_FAT12 |
886 | dec ecx |
886 | dec ecx |
887 | cmp eax, 2 |
887 | cmp eax, 2 |
888 | jb gff_reset |
888 | jb gff_reset |
889 | 889 | ||
890 | gff_test: |
890 | gff_test: |
891 | cmp eax, [ebp+FAT.LAST_CLUSTER]; if above last cluster start at cluster 2 |
891 | cmp eax, [ebp+FAT.LAST_CLUSTER]; if above last cluster start at cluster 2 |
892 | jbe gff_in_range |
892 | jbe gff_in_range |
893 | gff_reset: |
893 | gff_reset: |
894 | mov eax, 2 |
894 | mov eax, 2 |
895 | 895 | ||
896 | gff_in_range: |
896 | gff_in_range: |
897 | push eax |
897 | push eax |
898 | call get_FAT ; get cluster state |
898 | call get_FAT ; get cluster state |
899 | jc gff_not_found_1 |
899 | jc gff_not_found_1 |
900 | 900 | ||
901 | test eax, eax ; is it free? |
901 | test eax, eax ; is it free? |
902 | pop eax |
902 | pop eax |
903 | je gff_found ; yes |
903 | je gff_found ; yes |
904 | inc eax ; next cluster |
904 | inc eax ; next cluster |
905 | dec ecx ; is all checked? |
905 | dec ecx ; is all checked? |
906 | jnz gff_test ; no |
906 | jnz gff_test ; no |
907 | 907 | ||
908 | gff_not_found: |
908 | gff_not_found: |
909 | pop ecx ; yes. disk is full |
909 | pop ecx ; yes. disk is full |
910 | stc |
910 | stc |
911 | ret |
911 | ret |
912 | 912 | ||
913 | gff_not_found_1: |
913 | gff_not_found_1: |
914 | pop eax |
914 | pop eax |
915 | jmp gff_not_found |
915 | jmp gff_not_found |
916 | 916 | ||
917 | gff_found: |
917 | gff_found: |
918 | lea ecx, [eax+1] |
918 | lea ecx, [eax+1] |
919 | mov [ebp+FAT.fatStartScan], ecx |
919 | mov [ebp+FAT.fatStartScan], ecx |
920 | pop ecx |
920 | pop ecx |
921 | clc |
921 | clc |
922 | ret |
922 | ret |
923 | 923 | ||
924 | get_free_FAT12: |
924 | get_free_FAT12: |
925 | push edx edi |
925 | push edx edi |
926 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
926 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
927 | cmp eax, 2 |
927 | cmp eax, 2 |
928 | jb .reset |
928 | jb .reset |
929 | cmp eax, ecx |
929 | cmp eax, ecx |
930 | jbe @f |
930 | jbe @f |
931 | .reset: |
931 | .reset: |
932 | mov eax, 2 |
932 | mov eax, 2 |
933 | @@: |
933 | @@: |
934 | mov edx, eax |
934 | mov edx, eax |
935 | lea edi, [edi+eax*2] |
935 | lea edi, [edi+eax*2] |
936 | sub ecx, eax |
936 | sub ecx, eax |
937 | inc ecx |
937 | inc ecx |
938 | xor eax, eax |
938 | xor eax, eax |
939 | repnz scasw |
939 | repnz scasw |
940 | jz .found |
940 | jz .found |
941 | cmp edx, 2 |
941 | cmp edx, 2 |
942 | jz .notfound |
942 | jz .notfound |
943 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
943 | mov edi, [ebp+FAT.fat12_unpacked_ptr] |
944 | lea ecx, [edx-2] |
944 | lea ecx, [edx-2] |
945 | repnz scasw |
945 | repnz scasw |
946 | jnz .notfound |
946 | jnz .notfound |
947 | .found: |
947 | .found: |
948 | sub edi, [ebp+FAT.fat12_unpacked_ptr] |
948 | sub edi, [ebp+FAT.fat12_unpacked_ptr] |
949 | shr edi, 1 |
949 | shr edi, 1 |
950 | mov [ebp+FAT.fatStartScan], edi |
950 | mov [ebp+FAT.fatStartScan], edi |
951 | lea eax, [edi-1] |
951 | lea eax, [edi-1] |
952 | pop edi edx ecx |
952 | pop edi edx ecx |
953 | ret |
953 | ret |
954 | .notfound: |
954 | .notfound: |
955 | pop edi edx ecx |
955 | pop edi edx ecx |
956 | stc |
956 | stc |
957 | ret |
957 | ret |
958 | 958 | ||
959 | 959 | ||
960 | write_fat_sector: |
960 | write_fat_sector: |
961 | ;----------------------------------------------------------- |
961 | ;----------------------------------------------------------- |
962 | ; write changed fat to disk |
962 | ; write changed fat to disk |
963 | ;----------------------------------------------------------- |
963 | ;----------------------------------------------------------- |
964 | push eax ebx ecx |
964 | push eax ebx ecx |
965 | 965 | ||
966 | mov [ebp+FAT.fat_change], 0 |
966 | mov [ebp+FAT.fat_change], 0 |
967 | mov eax, [ebp+FAT.fat_in_cache] |
967 | mov eax, [ebp+FAT.fat_in_cache] |
968 | cmp eax, -1 |
968 | cmp eax, -1 |
969 | jz write_fat_not_used |
969 | jz write_fat_not_used |
970 | mov ebx, [ebp+FAT.fat_cache_ptr] |
970 | mov ebx, [ebp+FAT.fat_cache_ptr] |
971 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
971 | mov ecx, [ebp+FAT.NUMBER_OF_FATS] |
972 | 972 | ||
973 | write_next_fat: |
973 | write_next_fat: |
974 | push eax |
974 | push eax |
975 | call fs_write32_sys |
975 | call fs_write32_sys |
976 | test eax, eax |
976 | test eax, eax |
977 | pop eax |
977 | pop eax |
978 | jnz write_fat_not_used |
978 | jnz write_fat_not_used |
979 | 979 | ||
980 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
980 | add eax, [ebp+FAT.SECTORS_PER_FAT] |
981 | dec ecx |
981 | dec ecx |
982 | jnz write_next_fat |
982 | jnz write_next_fat |
983 | 983 | ||
984 | write_fat_not_used: |
984 | write_fat_not_used: |
985 | pop ecx ebx eax |
985 | pop ecx ebx eax |
986 | ret |
986 | ret |
987 | 987 | ||
988 | 988 | ||
989 | 989 | ||
990 | 990 | ||
991 | 991 | ||
992 | bcd2bin: |
992 | bcd2bin: |
993 | ;---------------------------------- |
993 | ;---------------------------------- |
994 | ; input : AL=BCD number (eg. 0x11) |
994 | ; input : AL=BCD number (eg. 0x11) |
995 | ; output : AH=0 |
995 | ; output : AH=0 |
996 | ; AL=decimal number (eg. 11) |
996 | ; AL=decimal number (eg. 11) |
997 | ;---------------------------------- |
997 | ;---------------------------------- |
998 | xor ah, ah |
998 | xor ah, ah |
999 | shl ax, 4 |
999 | shl ax, 4 |
1000 | shr al, 4 |
1000 | shr al, 4 |
1001 | aad |
1001 | aad |
1002 | ret |
1002 | ret |
1003 | 1003 | ||
1004 | 1004 | ||
1005 | get_date_for_file: |
1005 | get_date_for_file: |
1006 | ;----------------------------------------------------- |
1006 | ;----------------------------------------------------- |
1007 | ; Get date from CMOS and pack day,month,year in AX |
1007 | ; Get date from CMOS and pack day,month,year in AX |
1008 | ; DATE bits 0..4 : day of month 0..31 |
1008 | ; DATE bits 0..4 : day of month 0..31 |
1009 | ; 5..8 : month of year 1..12 |
1009 | ; 5..8 : month of year 1..12 |
1010 | ; 9..15 : count of years from 1980 |
1010 | ; 9..15 : count of years from 1980 |
1011 | ;----------------------------------------------------- |
1011 | ;----------------------------------------------------- |
1012 | mov al, 0x7 ;day |
1012 | mov al, 0x7 ;day |
1013 | out 0x70, al |
1013 | out 0x70, al |
1014 | in al, 0x71 |
1014 | in al, 0x71 |
1015 | call bcd2bin |
1015 | call bcd2bin |
1016 | ror eax, 5 |
1016 | ror eax, 5 |
1017 | 1017 | ||
1018 | mov al, 0x8 ;month |
1018 | mov al, 0x8 ;month |
1019 | out 0x70, al |
1019 | out 0x70, al |
1020 | in al, 0x71 |
1020 | in al, 0x71 |
1021 | call bcd2bin |
1021 | call bcd2bin |
1022 | ror eax, 4 |
1022 | ror eax, 4 |
1023 | 1023 | ||
1024 | mov al, 0x9 ;year |
1024 | mov al, 0x9 ;year |
1025 | out 0x70, al |
1025 | out 0x70, al |
1026 | in al, 0x71 |
1026 | in al, 0x71 |
1027 | call bcd2bin |
1027 | call bcd2bin |
1028 | add ax, 20 ;because CMOS return only the two last |
1028 | add ax, 20 ;because CMOS return only the two last |
1029 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
1029 | ;digit (eg. 2000 -> 00 , 2001 -> 01) and we |
1030 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
1030 | rol eax, 9 ;need the difference with 1980 (eg. 2001-1980) |
1031 | ret |
1031 | ret |
1032 | 1032 | ||
1033 | 1033 | ||
1034 | get_time_for_file: |
1034 | get_time_for_file: |
1035 | ;----------------------------------------------------- |
1035 | ;----------------------------------------------------- |
1036 | ; Get time from CMOS and pack hour,minute,second in AX |
1036 | ; Get time from CMOS and pack hour,minute,second in AX |
1037 | ; TIME bits 0..4 : second (the low bit is lost) |
1037 | ; TIME bits 0..4 : second (the low bit is lost) |
1038 | ; 5..10 : minute 0..59 |
1038 | ; 5..10 : minute 0..59 |
1039 | ; 11..15 : hour 0..23 |
1039 | ; 11..15 : hour 0..23 |
1040 | ;----------------------------------------------------- |
1040 | ;----------------------------------------------------- |
1041 | mov al, 0x0 ;second |
1041 | mov al, 0x0 ;second |
1042 | out 0x70, al |
1042 | out 0x70, al |
1043 | in al, 0x71 |
1043 | in al, 0x71 |
1044 | call bcd2bin |
1044 | call bcd2bin |
1045 | ror eax, 6 |
1045 | ror eax, 6 |
1046 | 1046 | ||
1047 | mov al, 0x2 ;minute |
1047 | mov al, 0x2 ;minute |
1048 | out 0x70, al |
1048 | out 0x70, al |
1049 | in al, 0x71 |
1049 | in al, 0x71 |
1050 | call bcd2bin |
1050 | call bcd2bin |
1051 | ror eax, 6 |
1051 | ror eax, 6 |
1052 | 1052 | ||
1053 | mov al, 0x4 ;hour |
1053 | mov al, 0x4 ;hour |
1054 | out 0x70, al |
1054 | out 0x70, al |
1055 | in al, 0x71 |
1055 | in al, 0x71 |
1056 | call bcd2bin |
1056 | call bcd2bin |
1057 | rol eax, 11 |
1057 | rol eax, 11 |
1058 | ret |
1058 | ret |
1059 | 1059 | ||
1060 | 1060 | ||
1061 | set_current_time_for_entry: |
1061 | set_current_time_for_entry: |
1062 | ;----------------------------------------------------- |
1062 | ;----------------------------------------------------- |
1063 | ; Set current time/date for file entry |
1063 | ; Set current time/date for file entry |
1064 | ; input : ebx = file entry pointer |
1064 | ; input : ebx = file entry pointer |
1065 | ;----------------------------------------------------- |
1065 | ;----------------------------------------------------- |
1066 | push eax |
1066 | push eax |
1067 | call get_time_for_file; update files date/time |
1067 | call get_time_for_file; update files date/time |
1068 | mov [ebx+22], ax |
1068 | mov [ebx+22], ax |
1069 | call get_date_for_file |
1069 | call get_date_for_file |
1070 | mov [ebx+24], ax |
1070 | mov [ebx+24], ax |
1071 | pop eax |
1071 | pop eax |
1072 | ret |
1072 | ret |
1073 | 1073 | ||
1074 | 1074 | ||
1075 | 1075 | ||
1076 | add_disk_free_space: |
1076 | add_disk_free_space: |
1077 | ;----------------------------------------------------- |
1077 | ;----------------------------------------------------- |
1078 | ; input : ecx = cluster count |
1078 | ; input : ecx = cluster count |
1079 | ; Note : negative = remove clusters from free space |
1079 | ; Note : negative = remove clusters from free space |
1080 | ; positive = add clusters to free space |
1080 | ; positive = add clusters to free space |
1081 | ;----------------------------------------------------- |
1081 | ;----------------------------------------------------- |
1082 | test ecx, ecx ; no change |
1082 | test ecx, ecx ; no change |
1083 | je add_dfs_no |
1083 | je add_dfs_no |
1084 | cmp [ebp+FAT.fs_type], 32 ; free disk space only used by fat32 |
1084 | cmp [ebp+FAT.fs_type], 32 ; free disk space only used by fat32 |
1085 | jne add_dfs_no |
1085 | jne add_dfs_no |
1086 | 1086 | ||
1087 | push eax ebx |
1087 | push eax ebx |
1088 | mov eax, [ebp+FAT.ADR_FSINFO] |
1088 | mov eax, [ebp+FAT.ADR_FSINFO] |
1089 | lea ebx, [ebp+FAT.fsinfo_buffer] |
1089 | lea ebx, [ebp+FAT.fsinfo_buffer] |
1090 | call fs_read32_sys |
1090 | call fs_read32_sys |
1091 | test eax, eax |
1091 | test eax, eax |
1092 | jnz add_not_fs |
1092 | jnz add_not_fs |
1093 | 1093 | ||
1094 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
1094 | cmp dword [ebx+0x1fc], 0xaa550000; check sector id |
1095 | jne add_not_fs |
1095 | jne add_not_fs |
1096 | 1096 | ||
1097 | add [ebx+0x1e8], ecx |
1097 | add [ebx+0x1e8], ecx |
1098 | push [ebp+FAT.fatStartScan] |
1098 | push [ebp+FAT.fatStartScan] |
1099 | pop dword [ebx+0x1ec] |
1099 | pop dword [ebx+0x1ec] |
1100 | mov eax, [ebp+FAT.ADR_FSINFO] |
1100 | mov eax, [ebp+FAT.ADR_FSINFO] |
1101 | call fs_write32_sys |
1101 | call fs_write32_sys |
1102 | ; jc add_not_fs |
1102 | ; jc add_not_fs |
1103 | 1103 | ||
1104 | add_not_fs: |
1104 | add_not_fs: |
1105 | pop ebx eax |
1105 | pop ebx eax |
1106 | 1106 | ||
1107 | add_dfs_no: |
1107 | add_dfs_no: |
1108 | ret |
1108 | ret |
1109 | 1109 | ||
1110 | 1110 | ||
1111 | 1111 | ||
1112 | clear_cluster_chain: |
1112 | clear_cluster_chain: |
1113 | ;----------------------------------------------------- |
1113 | ;----------------------------------------------------- |
1114 | ; input : eax = first cluster |
1114 | ; input : eax = first cluster |
1115 | ;----------------------------------------------------- |
1115 | ;----------------------------------------------------- |
1116 | push eax ecx edx |
1116 | push eax ecx edx |
1117 | xor ecx, ecx ; cluster count |
1117 | xor ecx, ecx ; cluster count |
1118 | 1118 | ||
1119 | clean_new_chain: |
1119 | clean_new_chain: |
1120 | cmp eax, [ebp+FAT.LAST_CLUSTER]; end of file |
1120 | cmp eax, [ebp+FAT.LAST_CLUSTER]; end of file |
1121 | ja delete_OK |
1121 | ja delete_OK |
1122 | cmp eax, 2 ; unfinished fat chain or zero length file |
1122 | cmp eax, 2 ; unfinished fat chain or zero length file |
1123 | jb delete_OK |
1123 | jb delete_OK |
1124 | cmp eax, [ebp+FAT.ROOT_CLUSTER]; don't remove root cluster |
1124 | cmp eax, [ebp+FAT.ROOT_CLUSTER]; don't remove root cluster |
1125 | jz delete_OK |
1125 | jz delete_OK |
1126 | 1126 | ||
1127 | xor edx, edx |
1127 | xor edx, edx |
1128 | call set_FAT ; clear fat entry |
1128 | call set_FAT ; clear fat entry |
1129 | jc access_denied_01 |
1129 | jc access_denied_01 |
1130 | 1130 | ||
1131 | inc ecx ; update cluster count |
1131 | inc ecx ; update cluster count |
1132 | mov eax, edx ; old cluster |
1132 | mov eax, edx ; old cluster |
1133 | jmp clean_new_chain |
1133 | jmp clean_new_chain |
1134 | 1134 | ||
1135 | delete_OK: |
1135 | delete_OK: |
1136 | call add_disk_free_space; add clusters to free disk space |
1136 | call add_disk_free_space; add clusters to free disk space |
1137 | clc |
1137 | clc |
1138 | access_denied_01: |
1138 | access_denied_01: |
1139 | pop edx ecx eax |
1139 | pop edx ecx eax |
1140 | ret |
1140 | ret |
1141 | 1141 | ||
1142 | 1142 | ||
1143 | if 0 |
1143 | if 0 |
1144 | get_hd_info: |
1144 | get_hd_info: |
1145 | ;----------------------------------------------------------- |
1145 | ;----------------------------------------------------------- |
1146 | ; output : eax = 0 - ok |
1146 | ; output : eax = 0 - ok |
1147 | ; 3 - unknown FS |
1147 | ; 3 - unknown FS |
1148 | ; 10 - access denied |
1148 | ; 10 - access denied |
1149 | ; edx = cluster size in bytes |
1149 | ; edx = cluster size in bytes |
1150 | ; ebx = total clusters on disk |
1150 | ; ebx = total clusters on disk |
1151 | ; ecx = free clusters on disk |
1151 | ; ecx = free clusters on disk |
1152 | ;----------------------------------------------------------- |
1152 | ;----------------------------------------------------------- |
1153 | cmp [ebp+FAT.fs_type], 16 |
1153 | cmp [ebp+FAT.fs_type], 16 |
1154 | jz info_fat_ok |
1154 | jz info_fat_ok |
1155 | cmp [ebp+FAT.fs_type], 32 |
1155 | cmp [ebp+FAT.fs_type], 32 |
1156 | jz info_fat_ok |
1156 | jz info_fat_ok |
1157 | xor edx, edx |
1157 | xor edx, edx |
1158 | xor ebx, ebx |
1158 | xor ebx, ebx |
1159 | xor ecx, ecx |
1159 | xor ecx, ecx |
1160 | mov eax, ERROR_UNKNOWN_FS |
1160 | mov eax, ERROR_UNKNOWN_FS |
1161 | ret |
1161 | ret |
1162 | 1162 | ||
1163 | info_fat_ok: |
1163 | info_fat_ok: |
1164 | ; call reserve_hd1 |
1164 | ; call reserve_hd1 |
1165 | 1165 | ||
1166 | xor ecx, ecx ; count of free clusters |
1166 | xor ecx, ecx ; count of free clusters |
1167 | mov eax, 2 |
1167 | mov eax, 2 |
1168 | mov ebx, [ebp+FAT.LAST_CLUSTER] |
1168 | mov ebx, [ebp+FAT.LAST_CLUSTER] |
1169 | 1169 | ||
1170 | info_cluster: |
1170 | info_cluster: |
1171 | push eax |
1171 | push eax |
1172 | call get_FAT ; get cluster info |
1172 | call get_FAT ; get cluster info |
1173 | jc info_access_denied |
1173 | jc info_access_denied |
1174 | 1174 | ||
1175 | test eax, eax ; is it free? |
1175 | test eax, eax ; is it free? |
1176 | jnz info_used ; no |
1176 | jnz info_used ; no |
1177 | inc ecx |
1177 | inc ecx |
1178 | 1178 | ||
1179 | info_used: |
1179 | info_used: |
1180 | pop eax |
1180 | pop eax |
1181 | inc eax |
1181 | inc eax |
1182 | cmp eax, ebx ; is above last cluster? |
1182 | cmp eax, ebx ; is above last cluster? |
1183 | jbe info_cluster ; no. test next cluster |
1183 | jbe info_cluster ; no. test next cluster |
1184 | 1184 | ||
1185 | dec ebx ; cluster count |
1185 | dec ebx ; cluster count |
1186 | imul edx, [ebp+FAT.SECTORS_PER_CLUSTER], 512; cluster size in bytes |
1186 | imul edx, [ebp+FAT.SECTORS_PER_CLUSTER], 512; cluster size in bytes |
1187 | xor eax, eax |
1187 | xor eax, eax |
1188 | ret |
1188 | ret |
1189 | 1189 | ||
1190 | info_access_denied: |
1190 | info_access_denied: |
1191 | add esp, 4 |
1191 | add esp, 4 |
1192 | xor edx, edx |
1192 | xor edx, edx |
1193 | xor ebx, ebx |
1193 | xor ebx, ebx |
1194 | xor ecx, ecx |
1194 | xor ecx, ecx |
1195 | mov eax, ERROR_ACCESS_DENIED |
1195 | mov eax, ERROR_ACCESS_DENIED |
1196 | ret |
1196 | ret |
1197 | end if |
1197 | end if |
1198 | 1198 | ||
1199 | update_disk: |
1199 | update_disk: |
1200 | cmp [ebp+FAT.fat_change], 0 ; is fat changed? |
1200 | cmp [ebp+FAT.fat_change], 0 ; is fat changed? |
1201 | je upd_no_change |
1201 | je upd_no_change |
1202 | cmp [ebp+FAT.fs_type], 12 |
1202 | cmp [ebp+FAT.fs_type], 12 |
1203 | jz .fat12 |
1203 | jz .fat12 |
1204 | ;----------------------------------------------------------- |
1204 | ;----------------------------------------------------------- |
1205 | ; write changed fat and cache to disk |
1205 | ; write changed fat and cache to disk |
1206 | ;----------------------------------------------------------- |
1206 | ;----------------------------------------------------------- |
1207 | 1207 | ||
1208 | call write_fat_sector |
1208 | call write_fat_sector |
1209 | jc update_disk_acces_denied |
1209 | jc update_disk_acces_denied |
1210 | jmp upd_no_change |
1210 | jmp upd_no_change |
1211 | .fat12: |
1211 | .fat12: |
1212 | call restorefatchain |
1212 | call restorefatchain |
1213 | mov [ebp+FAT.fat_change], 0 |
1213 | mov [ebp+FAT.fat_change], 0 |
1214 | 1214 | ||
1215 | upd_no_change: |
1215 | upd_no_change: |
1216 | 1216 | ||
1217 | push esi |
1217 | push esi |
1218 | mov esi, [ebp+PARTITION.Disk] |
1218 | mov esi, [ebp+PARTITION.Disk] |
1219 | call disk_sync |
1219 | call disk_sync |
1220 | pop esi |
1220 | pop esi |
1221 | update_disk_acces_denied: |
1221 | update_disk_acces_denied: |
1222 | ret |
1222 | ret |
1223 | 1223 | ||
1224 | fat_lock: |
1224 | fat_lock: |
1225 | lea ecx, [ebp+FAT.Lock] |
1225 | lea ecx, [ebp+FAT.Lock] |
1226 | jmp mutex_lock |
1226 | jmp mutex_lock |
1227 | fat_unlock: |
1227 | fat_unlock: |
1228 | lea ecx, [ebp+FAT.Lock] |
1228 | lea ecx, [ebp+FAT.Lock] |
1229 | jmp mutex_unlock |
1229 | jmp mutex_unlock |
1230 | 1230 | ||
1231 | ; \begin{diamond} |
1231 | ; \begin{diamond} |
1232 | uni2ansi_str: |
1232 | uni2ansi_str: |
1233 | ; convert UNICODE zero-terminated string to ASCII-string (codepage 866) |
1233 | ; convert UNICODE zero-terminated string to ASCII-string (codepage 866) |
1234 | ; in: esi->source, edi->buffer (may be esi=edi) |
1234 | ; in: esi->source, edi->buffer (may be esi=edi) |
1235 | ; destroys: eax,esi,edi |
1235 | ; destroys: eax,esi,edi |
1236 | lodsw |
1236 | lodsw |
1237 | test ax, ax |
1237 | test ax, ax |
1238 | jz .done |
1238 | jz .done |
1239 | cmp ax, 0x80 |
1239 | cmp ax, 0x80 |
1240 | jb .ascii |
1240 | jb .ascii |
1241 | cmp ax, 0x401 |
1241 | cmp ax, 0x401 |
1242 | jz .yo1 |
1242 | jz .yo1 |
1243 | cmp ax, 0x451 |
1243 | cmp ax, 0x451 |
1244 | jz .yo2 |
1244 | jz .yo2 |
1245 | cmp ax, 0x410 |
1245 | cmp ax, 0x410 |
1246 | jb .unk |
1246 | jb .unk |
1247 | cmp ax, 0x440 |
1247 | cmp ax, 0x440 |
1248 | jb .rus1 |
1248 | jb .rus1 |
1249 | cmp ax, 0x450 |
1249 | cmp ax, 0x450 |
1250 | jb .rus2 |
1250 | jb .rus2 |
1251 | .unk: |
1251 | .unk: |
1252 | mov al, '_' |
1252 | mov al, '_' |
1253 | jmp .doit |
1253 | jmp .doit |
1254 | .yo1: |
1254 | .yo1: |
1255 | mov al, 0xF0 ; 'Ё' |
1255 | mov al, 0xF0 ; 'Ё' |
1256 | jmp .doit |
1256 | jmp .doit |
1257 | .yo2: |
1257 | .yo2: |
1258 | mov al, 0xF1 ; 'ё' |
1258 | mov al, 0xF1 ; 'ё' |
1259 | jmp .doit |
1259 | jmp .doit |
1260 | .rus1: |
1260 | .rus1: |
1261 | ; 0x410-0x43F -> 0x80-0xAF |
1261 | ; 0x410-0x43F -> 0x80-0xAF |
1262 | add al, 0x70 |
1262 | add al, 0x70 |
1263 | jmp .doit |
1263 | jmp .doit |
1264 | .rus2: |
1264 | .rus2: |
1265 | ; 0x440-0x44F -> 0xE0-0xEF |
1265 | ; 0x440-0x44F -> 0xE0-0xEF |
1266 | add al, 0xA0 |
1266 | add al, 0xA0 |
1267 | .ascii: |
1267 | .ascii: |
1268 | .doit: |
1268 | .doit: |
1269 | stosb |
1269 | stosb |
1270 | jmp uni2ansi_str |
1270 | jmp uni2ansi_str |
1271 | .done: |
1271 | .done: |
1272 | mov byte [edi], 0 |
1272 | mov byte [edi], 0 |
1273 | ret |
1273 | ret |
1274 | 1274 | ||
1275 | ansi2uni_char: |
1275 | ansi2uni_char: |
1276 | ; convert ANSI character in al to UNICODE character in ax, using cp866 encoding |
1276 | ; convert ANSI character in al to UNICODE character in ax, using cp866 encoding |
1277 | mov ah, 0 |
1277 | mov ah, 0 |
1278 | ; 0x00-0x7F - trivial map |
1278 | ; 0x00-0x7F - trivial map |
1279 | cmp al, 0x80 |
1279 | cmp al, 0x80 |
1280 | jb .ret |
1280 | jb .ret |
1281 | ; 0x80-0xAF -> 0x410-0x43F |
1281 | ; 0x80-0xAF -> 0x410-0x43F |
1282 | cmp al, 0xB0 |
1282 | cmp al, 0xB0 |
1283 | jae @f |
1283 | jae @f |
1284 | add ax, 0x410-0x80 |
1284 | add ax, 0x410-0x80 |
1285 | .ret: |
1285 | .ret: |
1286 | ret |
1286 | ret |
1287 | @@: |
1287 | @@: |
1288 | ; 0xE0-0xEF -> 0x440-0x44F |
1288 | ; 0xE0-0xEF -> 0x440-0x44F |
1289 | cmp al, 0xE0 |
1289 | cmp al, 0xE0 |
1290 | jb .unk |
1290 | jb .unk |
1291 | cmp al, 0xF0 |
1291 | cmp al, 0xF0 |
1292 | jae @f |
1292 | jae @f |
1293 | add ax, 0x440-0xE0 |
1293 | add ax, 0x440-0xE0 |
1294 | ret |
1294 | ret |
1295 | ; 0xF0 -> 0x401 |
1295 | ; 0xF0 -> 0x401 |
1296 | ; 0xF1 -> 0x451 |
1296 | ; 0xF1 -> 0x451 |
1297 | @@: |
1297 | @@: |
1298 | cmp al, 0xF0 ; 'Ё' |
1298 | cmp al, 0xF0 ; 'Ё' |
1299 | jz .yo1 |
1299 | jz .yo1 |
1300 | cmp al, 0xF1 ; 'ё' |
1300 | cmp al, 0xF1 ; 'ё' |
1301 | jz .yo2 |
1301 | jz .yo2 |
1302 | .unk: |
1302 | .unk: |
1303 | mov al, '_' ; ah=0 |
1303 | mov al, '_' ; ah=0 |
1304 | ret |
1304 | ret |
1305 | .yo1: |
1305 | .yo1: |
1306 | mov ax, 0x401 |
1306 | mov ax, 0x401 |
1307 | ret |
1307 | ret |
1308 | .yo2: |
1308 | .yo2: |
1309 | mov ax, 0x451 |
1309 | mov ax, 0x451 |
1310 | ret |
1310 | ret |
1311 | 1311 | ||
1312 | char_toupper: |
1312 | char_toupper: |
1313 | ; convert character to uppercase, using cp866 encoding |
1313 | ; convert character to uppercase, using cp866 encoding |
1314 | ; in: al=symbol |
1314 | ; in: al=symbol |
1315 | ; out: al=converted symbol |
1315 | ; out: al=converted symbol |
1316 | cmp al, 'a' |
1316 | cmp al, 'a' |
1317 | jb .ret |
1317 | jb .ret |
1318 | cmp al, 'z' |
1318 | cmp al, 'z' |
1319 | jbe .az |
1319 | jbe .az |
1320 | cmp al, 0xF1 ; 'ё' |
1320 | cmp al, 0xF1 ; 'ё' |
1321 | jz .yo1 |
1321 | jz .yo1 |
1322 | cmp al, 0xA0 ; 'а' |
1322 | cmp al, 0xA0 ; 'а' |
1323 | jb .ret |
1323 | jb .ret |
1324 | cmp al, 0xE0 ; 'р' |
1324 | cmp al, 0xE0 ; 'р' |
1325 | jb .rus1 |
1325 | jb .rus1 |
1326 | cmp al, 0xEF ; 'я' |
1326 | cmp al, 0xEF ; 'я' |
1327 | ja .ret |
1327 | ja .ret |
1328 | ; 0xE0-0xEF -> 0x90-0x9F |
1328 | ; 0xE0-0xEF -> 0x90-0x9F |
1329 | sub al, 0xE0-0x90 |
1329 | sub al, 0xE0-0x90 |
1330 | .ret: |
1330 | .ret: |
1331 | ret |
1331 | ret |
1332 | .rus1: |
1332 | .rus1: |
1333 | ; 0xA0-0xAF -> 0x80-0x8F |
1333 | ; 0xA0-0xAF -> 0x80-0x8F |
1334 | .az: |
1334 | .az: |
1335 | and al, not 0x20 |
1335 | and al, not 0x20 |
1336 | ret |
1336 | ret |
1337 | .yo1: |
1337 | .yo1: |
1338 | ; 0xF1 -> 0xF0 |
1338 | ; 0xF1 -> 0xF0 |
1339 | dec ax |
1339 | dec ax |
1340 | ret |
1340 | ret |
1341 | 1341 | ||
1342 | fat_get_name: |
1342 | fat_get_name: |
1343 | ; in: edi->FAT entry |
1343 | ; in: edi->FAT entry |
1344 | ; out: CF=1 - no valid entry |
1344 | ; out: CF=1 - no valid entry |
1345 | ; else CF=0 and ebp->ASCIIZ-name |
1345 | ; else CF=0 and ebp->ASCIIZ-name |
1346 | ; (maximum length of filename is 255 (wide) symbols without trailing 0, |
1346 | ; (maximum length of filename is 255 (wide) symbols without trailing 0, |
1347 | ; but implementation requires buffer 261 words) |
1347 | ; but implementation requires buffer 261 words) |
1348 | ; destroys eax |
1348 | ; destroys eax |
1349 | cmp byte [edi], 0 |
1349 | cmp byte [edi], 0 |
1350 | jz .no |
1350 | jz .no |
1351 | cmp byte [edi], 0xE5 |
1351 | cmp byte [edi], 0xE5 |
1352 | jnz @f |
1352 | jnz @f |
1353 | .no: |
1353 | .no: |
1354 | stc |
1354 | stc |
1355 | ret |
1355 | ret |
1356 | @@: |
1356 | @@: |
1357 | cmp byte [edi+11], 0xF |
1357 | cmp byte [edi+11], 0xF |
1358 | jz .longname |
1358 | jz .longname |
1359 | test byte [edi+11], 8 |
1359 | test byte [edi+11], 8 |
1360 | jnz .no |
1360 | jnz .no |
1361 | push ecx |
1361 | push ecx |
1362 | push edi ebp |
1362 | push edi ebp |
1363 | test byte [ebp-4], 1 |
1363 | test byte [ebp-4], 1 |
1364 | jnz .unicode_short |
1364 | jnz .unicode_short |
1365 | 1365 | ||
1366 | mov eax, [edi] |
1366 | mov eax, [edi] |
1367 | mov ecx, [edi+4] |
1367 | mov ecx, [edi+4] |
1368 | mov [ebp], eax |
1368 | mov [ebp], eax |
1369 | mov [ebp+4], ecx |
1369 | mov [ebp+4], ecx |
1370 | 1370 | ||
1371 | mov ecx, 8 |
1371 | mov ecx, 8 |
1372 | @@: |
1372 | @@: |
1373 | cmp byte [ebp+ecx-1], ' ' |
1373 | cmp byte [ebp+ecx-1], ' ' |
1374 | loope @b |
1374 | loope @b |
1375 | 1375 | ||
1376 | mov eax, [edi+8] |
1376 | mov eax, [edi+8] |
1377 | cmp al, ' ' |
1377 | cmp al, ' ' |
1378 | je .done |
1378 | je .done |
1379 | shl eax, 8 |
1379 | shl eax, 8 |
1380 | mov al, '.' |
1380 | mov al, '.' |
1381 | 1381 | ||
1382 | lea ebp, [ebp+ecx+1] |
1382 | lea ebp, [ebp+ecx+1] |
1383 | mov [ebp], eax |
1383 | mov [ebp], eax |
1384 | mov ecx, 3 |
1384 | mov ecx, 3 |
1385 | @@: |
1385 | @@: |
1386 | rol eax, 8 |
1386 | rol eax, 8 |
1387 | cmp al, ' ' |
1387 | cmp al, ' ' |
1388 | jne .done |
1388 | jne .done |
1389 | loop @b |
1389 | loop @b |
1390 | dec ebp |
1390 | dec ebp |
1391 | .done: |
1391 | .done: |
1392 | and byte [ebp+ecx+1], 0 ; CF=0 |
1392 | and byte [ebp+ecx+1], 0 ; CF=0 |
1393 | pop ebp edi ecx |
1393 | pop ebp edi ecx |
1394 | ret |
1394 | ret |
1395 | .unicode_short: |
1395 | .unicode_short: |
1396 | mov ecx, 8 |
1396 | mov ecx, 8 |
1397 | push ecx |
1397 | push ecx |
1398 | @@: |
1398 | @@: |
1399 | mov al, [edi] |
1399 | mov al, [edi] |
1400 | inc edi |
1400 | inc edi |
1401 | call ansi2uni_char |
1401 | call ansi2uni_char |
1402 | mov [ebp], ax |
1402 | mov [ebp], ax |
1403 | inc ebp |
1403 | inc ebp |
1404 | inc ebp |
1404 | inc ebp |
1405 | loop @b |
1405 | loop @b |
1406 | pop ecx |
1406 | pop ecx |
1407 | @@: |
1407 | @@: |
1408 | cmp word [ebp-2], ' ' |
1408 | cmp word [ebp-2], ' ' |
1409 | jnz @f |
1409 | jnz @f |
1410 | dec ebp |
1410 | dec ebp |
1411 | dec ebp |
1411 | dec ebp |
1412 | loop @b |
1412 | loop @b |
1413 | @@: |
1413 | @@: |
1414 | mov word [ebp], '.' |
1414 | mov word [ebp], '.' |
1415 | inc ebp |
1415 | inc ebp |
1416 | inc ebp |
1416 | inc ebp |
1417 | mov ecx, 3 |
1417 | mov ecx, 3 |
1418 | push ecx |
1418 | push ecx |
1419 | @@: |
1419 | @@: |
1420 | mov al, [edi] |
1420 | mov al, [edi] |
1421 | inc edi |
1421 | inc edi |
1422 | call ansi2uni_char |
1422 | call ansi2uni_char |
1423 | mov [ebp], ax |
1423 | mov [ebp], ax |
1424 | inc ebp |
1424 | inc ebp |
1425 | inc ebp |
1425 | inc ebp |
1426 | loop @b |
1426 | loop @b |
1427 | pop ecx |
1427 | pop ecx |
1428 | @@: |
1428 | @@: |
1429 | cmp word [ebp-2], ' ' |
1429 | cmp word [ebp-2], ' ' |
1430 | jnz @f |
1430 | jnz @f |
1431 | dec ebp |
1431 | dec ebp |
1432 | dec ebp |
1432 | dec ebp |
1433 | loop @b |
1433 | loop @b |
1434 | dec ebp |
1434 | dec ebp |
1435 | dec ebp |
1435 | dec ebp |
1436 | @@: |
1436 | @@: |
1437 | and word [ebp], 0 ; CF=0 |
1437 | and word [ebp], 0 ; CF=0 |
1438 | pop ebp edi ecx |
1438 | pop ebp edi ecx |
1439 | ret |
1439 | ret |
1440 | .longname: |
1440 | .longname: |
1441 | ; LFN |
1441 | ; LFN |
1442 | mov al, byte [edi] |
1442 | mov al, byte [edi] |
1443 | and eax, 0x3F |
1443 | and eax, 0x3F |
1444 | dec eax |
1444 | dec eax |
1445 | cmp al, 20 |
1445 | cmp al, 20 |
1446 | jae .no ; ignore invalid entries |
1446 | jae .no ; ignore invalid entries |
1447 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
1447 | mov word [ebp+260*2], 0 ; force null-terminating for orphans |
1448 | imul eax, 13*2 |
1448 | imul eax, 13*2 |
1449 | add ebp, eax |
1449 | add ebp, eax |
1450 | test byte [edi], 0x40 |
1450 | test byte [edi], 0x40 |
1451 | jz @f |
1451 | jz @f |
1452 | mov word [ebp+13*2], 0 |
1452 | mov word [ebp+13*2], 0 |
1453 | @@: |
1453 | @@: |
1454 | push eax |
1454 | push eax |
1455 | ; now copy name from edi to ebp ... |
1455 | ; now copy name from edi to ebp ... |
1456 | mov eax, [edi+1] |
1456 | mov eax, [edi+1] |
1457 | mov [ebp], eax ; symbols 1,2 |
1457 | mov [ebp], eax ; symbols 1,2 |
1458 | mov eax, [edi+5] |
1458 | mov eax, [edi+5] |
1459 | mov [ebp+4], eax ; 3,4 |
1459 | mov [ebp+4], eax ; 3,4 |
1460 | mov eax, [edi+9] |
1460 | mov eax, [edi+9] |
1461 | mov [ebp+8], ax ; 5 |
1461 | mov [ebp+8], ax ; 5 |
1462 | mov eax, [edi+14] |
1462 | mov eax, [edi+14] |
1463 | mov [ebp+10], eax ; 6,7 |
1463 | mov [ebp+10], eax ; 6,7 |
1464 | mov eax, [edi+18] |
1464 | mov eax, [edi+18] |
1465 | mov [ebp+14], eax ; 8,9 |
1465 | mov [ebp+14], eax ; 8,9 |
1466 | mov eax, [edi+22] |
1466 | mov eax, [edi+22] |
1467 | mov [ebp+18], eax ; 10,11 |
1467 | mov [ebp+18], eax ; 10,11 |
1468 | mov eax, [edi+28] |
1468 | mov eax, [edi+28] |
1469 | mov [ebp+22], eax ; 12,13 |
1469 | mov [ebp+22], eax ; 12,13 |
1470 | ; ... done |
1470 | ; ... done |
1471 | pop eax |
1471 | pop eax |
1472 | sub ebp, eax |
1472 | sub ebp, eax |
1473 | test eax, eax |
1473 | test eax, eax |
1474 | jz @f |
1474 | jz @f |
1475 | ; if this is not first entry, more processing required |
1475 | ; if this is not first entry, more processing required |
1476 | stc |
1476 | stc |
1477 | ret |
1477 | ret |
1478 | @@: |
1478 | @@: |
1479 | ; if this is first entry: |
1479 | ; if this is first entry: |
1480 | test byte [ebp-4], 1 |
1480 | test byte [ebp-4], 1 |
1481 | jnz .ret |
1481 | jnz .ret |
1482 | ; buffer at ebp contains UNICODE name, convert it to ANSI |
1482 | ; buffer at ebp contains UNICODE name, convert it to ANSI |
1483 | push esi edi |
1483 | push esi edi |
1484 | mov esi, ebp |
1484 | mov esi, ebp |
1485 | mov edi, ebp |
1485 | mov edi, ebp |
1486 | call uni2ansi_str |
1486 | call uni2ansi_str |
1487 | pop edi esi |
1487 | pop edi esi |
1488 | .ret: |
1488 | .ret: |
1489 | clc |
1489 | clc |
1490 | ret |
1490 | ret |
1491 | 1491 | ||
1492 | fat_compare_name: |
1492 | fat_compare_name: |
1493 | ; compares ASCIIZ-names, case-insensitive (cp866 encoding) |
1493 | ; compares ASCIIZ-names, case-insensitive (cp866 encoding) |
1494 | ; in: esi->name, ebp->name |
1494 | ; in: esi->name, ebp->name |
1495 | ; out: if names match: ZF=1 and esi->next component of name |
1495 | ; out: if names match: ZF=1 and esi->next component of name |
1496 | ; else: ZF=0, esi is not changed |
1496 | ; else: ZF=0, esi is not changed |
1497 | ; destroys eax |
1497 | ; destroys eax |
1498 | push ebp esi |
1498 | push ebp esi |
1499 | .loop: |
1499 | .loop: |
1500 | mov al, [ebp] |
1500 | mov al, [ebp] |
1501 | inc ebp |
1501 | inc ebp |
1502 | call char_toupper |
1502 | call char_toupper |
1503 | push eax |
1503 | push eax |
1504 | lodsb |
1504 | lodsb |
1505 | call char_toupper |
1505 | call char_toupper |
1506 | cmp al, [esp] |
1506 | cmp al, [esp] |
1507 | jnz .done |
1507 | jnz .done |
1508 | pop eax |
1508 | pop eax |
1509 | test al, al |
1509 | test al, al |
1510 | jnz .loop |
1510 | jnz .loop |
1511 | dec esi |
1511 | dec esi |
1512 | pop eax |
1512 | pop eax |
1513 | pop ebp |
1513 | pop ebp |
1514 | xor eax, eax ; set ZF flag |
1514 | xor eax, eax ; set ZF flag |
1515 | ret |
1515 | ret |
1516 | .done: |
1516 | .done: |
1517 | cmp al, '/' |
1517 | cmp al, '/' |
1518 | jnz @f |
1518 | jnz @f |
1519 | cmp byte [esp], 0 |
1519 | cmp byte [esp], 0 |
1520 | jnz @f |
1520 | jnz @f |
1521 | mov [esp+4], esi |
1521 | mov [esp+4], esi |
1522 | @@: |
1522 | @@: |
1523 | pop eax |
1523 | pop eax |
1524 | pop esi ebp |
1524 | pop esi ebp |
1525 | ret |
1525 | ret |
1526 | 1526 | ||
1527 | fat_find_lfn: |
1527 | fat_find_lfn: |
1528 | ; in: esi->name |
1528 | ; in: esi->name |
1529 | ; [esp+4] = next |
1529 | ; [esp+4] = next |
1530 | ; [esp+8] = first |
1530 | ; [esp+8] = first |
1531 | ; [esp+C]... - possibly parameters for first and next |
1531 | ; [esp+C]... - possibly parameters for first and next |
1532 | ; out: CF=1 - file not found, eax=error code |
1532 | ; out: CF=1 - file not found, eax=error code |
1533 | ; else CF=0, esi->next name component, edi->direntry |
1533 | ; else CF=0, esi->next name component, edi->direntry |
1534 | pusha |
1534 | pusha |
1535 | lea eax, [esp+0Ch+20h] |
1535 | lea eax, [esp+0Ch+20h] |
1536 | call dword [eax-4] |
1536 | call dword [eax-4] |
1537 | jc .reterr |
1537 | jc .reterr |
1538 | sub esp, 262*2 ; reserve place for LFN |
1538 | sub esp, 262*2 ; reserve place for LFN |
1539 | push 0 ; for fat_get_name: read ASCII name |
1539 | push 0 ; for fat_get_name: read ASCII name |
1540 | .l1: |
1540 | .l1: |
1541 | lea ebp, [esp+4] |
1541 | lea ebp, [esp+4] |
1542 | call fat_get_name |
1542 | call fat_get_name |
1543 | jc .l2 |
1543 | jc .l2 |
1544 | call fat_compare_name |
1544 | call fat_compare_name |
1545 | jz .found |
1545 | jz .found |
1546 | .l2: |
1546 | .l2: |
1547 | mov ebp, [esp+8+262*2+4] |
1547 | mov ebp, [esp+8+262*2+4] |
1548 | lea eax, [esp+0Ch+20h+262*2+4] |
1548 | lea eax, [esp+0Ch+20h+262*2+4] |
1549 | call dword [eax-8] |
1549 | call dword [eax-8] |
1550 | jnc .l1 |
1550 | jnc .l1 |
1551 | add esp, 262*2+4 |
1551 | add esp, 262*2+4 |
1552 | .reterr: |
1552 | .reterr: |
1553 | mov [esp+28], eax |
1553 | mov [esp+28], eax |
1554 | stc |
1554 | stc |
1555 | popa |
1555 | popa |
1556 | ret |
1556 | ret |
1557 | .found: |
1557 | .found: |
1558 | add esp, 262*2+4 |
1558 | add esp, 262*2+4 |
1559 | mov ebp, [esp+8] |
1559 | mov ebp, [esp+8] |
1560 | ; if this is LFN entry, advance to true entry |
1560 | ; if this is LFN entry, advance to true entry |
1561 | cmp byte [edi+11], 0xF |
1561 | cmp byte [edi+11], 0xF |
1562 | jnz @f |
1562 | jnz @f |
1563 | lea eax, [esp+0Ch+20h] |
1563 | lea eax, [esp+0Ch+20h] |
1564 | call dword [eax-8] |
1564 | call dword [eax-8] |
1565 | jc .reterr |
1565 | jc .reterr |
1566 | @@: |
1566 | @@: |
1567 | add esp, 8 ; CF=0 |
1567 | add esp, 8 ; CF=0 |
1568 | push esi |
1568 | push esi |
1569 | push edi |
1569 | push edi |
1570 | popa |
1570 | popa |
1571 | ret |
1571 | ret |
1572 | 1572 | ||
1573 | fat_time_to_bdfe: |
1573 | fat_time_to_bdfe: |
1574 | ; in: eax=FAT time |
1574 | ; in: eax=FAT time |
1575 | ; out: eax=BDFE time |
1575 | ; out: eax=BDFE time |
1576 | push ecx edx |
1576 | push ecx edx |
1577 | mov ecx, eax |
1577 | mov ecx, eax |
1578 | mov edx, eax |
1578 | mov edx, eax |
1579 | shr eax, 11 |
1579 | shr eax, 11 |
1580 | shl eax, 16 ; hours |
1580 | shl eax, 16 ; hours |
1581 | and edx, 0x1F |
1581 | and edx, 0x1F |
1582 | add edx, edx |
1582 | add edx, edx |
1583 | mov al, dl ; seconds |
1583 | mov al, dl ; seconds |
1584 | shr ecx, 5 |
1584 | shr ecx, 5 |
1585 | and ecx, 0x3F |
1585 | and ecx, 0x3F |
1586 | mov ah, cl ; minutes |
1586 | mov ah, cl ; minutes |
1587 | pop edx ecx |
1587 | pop edx ecx |
1588 | ret |
1588 | ret |
1589 | 1589 | ||
1590 | fat_date_to_bdfe: |
1590 | fat_date_to_bdfe: |
1591 | push ecx edx |
1591 | push ecx edx |
1592 | mov ecx, eax |
1592 | mov ecx, eax |
1593 | mov edx, eax |
1593 | mov edx, eax |
1594 | shr eax, 9 |
1594 | shr eax, 9 |
1595 | add ax, 1980 |
1595 | add ax, 1980 |
1596 | shl eax, 16 ; year |
1596 | shl eax, 16 ; year |
1597 | and edx, 0x1F |
1597 | and edx, 0x1F |
1598 | mov al, dl ; day |
1598 | mov al, dl ; day |
1599 | shr ecx, 5 |
1599 | shr ecx, 5 |
1600 | and ecx, 0xF |
1600 | and ecx, 0xF |
1601 | mov ah, cl ; month |
1601 | mov ah, cl ; month |
1602 | pop edx ecx |
1602 | pop edx ecx |
1603 | ret |
1603 | ret |
1604 | 1604 | ||
1605 | bdfe_to_fat_time: |
1605 | bdfe_to_fat_time: |
1606 | push edx |
1606 | push edx |
1607 | mov edx, eax |
1607 | mov edx, eax |
1608 | shr eax, 16 |
1608 | shr eax, 16 |
1609 | and dh, 0x3F |
1609 | and dh, 0x3F |
1610 | shl eax, 6 |
1610 | shl eax, 6 |
1611 | or al, dh |
1611 | or al, dh |
1612 | shr dl, 1 |
1612 | shr dl, 1 |
1613 | and dl, 0x1F |
1613 | and dl, 0x1F |
1614 | shl eax, 5 |
1614 | shl eax, 5 |
1615 | or al, dl |
1615 | or al, dl |
1616 | pop edx |
1616 | pop edx |
1617 | ret |
1617 | ret |
1618 | 1618 | ||
1619 | bdfe_to_fat_date: |
1619 | bdfe_to_fat_date: |
1620 | push edx |
1620 | push edx |
1621 | mov edx, eax |
1621 | mov edx, eax |
1622 | shr eax, 16 |
1622 | shr eax, 16 |
1623 | sub ax, 1980 |
1623 | sub ax, 1980 |
1624 | and dh, 0xF |
1624 | and dh, 0xF |
1625 | shl eax, 4 |
1625 | shl eax, 4 |
1626 | or al, dh |
1626 | or al, dh |
1627 | and dl, 0x1F |
1627 | and dl, 0x1F |
1628 | shl eax, 5 |
1628 | shl eax, 5 |
1629 | or al, dl |
1629 | or al, dl |
1630 | pop edx |
1630 | pop edx |
1631 | ret |
1631 | ret |
1632 | 1632 | ||
1633 | fat_entry_to_bdfe: |
1633 | fat_entry_to_bdfe: |
1634 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
1634 | ; convert FAT entry at edi to BDFE (block of data of folder entry) at esi, advance esi |
1635 | ; destroys eax |
1635 | ; destroys eax |
1636 | mov eax, [ebp-4] |
1636 | mov eax, [ebp-4] |
1637 | mov [esi+4], eax ; ASCII/UNICODE name |
1637 | mov [esi+4], eax ; ASCII/UNICODE name |
1638 | fat_entry_to_bdfe2: |
1638 | fat_entry_to_bdfe2: |
1639 | movzx eax, byte [edi+11] |
1639 | movzx eax, byte [edi+11] |
1640 | mov [esi], eax ; attributes |
1640 | mov [esi], eax ; attributes |
1641 | movzx eax, word [edi+14] |
1641 | movzx eax, word [edi+14] |
1642 | call fat_time_to_bdfe |
1642 | call fat_time_to_bdfe |
1643 | mov [esi+8], eax ; creation time |
1643 | mov [esi+8], eax ; creation time |
1644 | movzx eax, word [edi+16] |
1644 | movzx eax, word [edi+16] |
1645 | call fat_date_to_bdfe |
1645 | call fat_date_to_bdfe |
1646 | mov [esi+12], eax ; creation date |
1646 | mov [esi+12], eax ; creation date |
1647 | and dword [esi+16], 0 ; last access time is not supported on FAT |
1647 | and dword [esi+16], 0 ; last access time is not supported on FAT |
1648 | movzx eax, word [edi+18] |
1648 | movzx eax, word [edi+18] |
1649 | call fat_date_to_bdfe |
1649 | call fat_date_to_bdfe |
1650 | mov [esi+20], eax ; last access date |
1650 | mov [esi+20], eax ; last access date |
1651 | movzx eax, word [edi+22] |
1651 | movzx eax, word [edi+22] |
1652 | call fat_time_to_bdfe |
1652 | call fat_time_to_bdfe |
1653 | mov [esi+24], eax ; last write time |
1653 | mov [esi+24], eax ; last write time |
1654 | movzx eax, word [edi+24] |
1654 | movzx eax, word [edi+24] |
1655 | call fat_date_to_bdfe |
1655 | call fat_date_to_bdfe |
1656 | mov [esi+28], eax ; last write date |
1656 | mov [esi+28], eax ; last write date |
1657 | mov eax, [edi+28] |
1657 | mov eax, [edi+28] |
1658 | mov [esi+32], eax ; file size (low dword) |
1658 | mov [esi+32], eax ; file size (low dword) |
1659 | xor eax, eax |
1659 | xor eax, eax |
1660 | mov [esi+36], eax ; file size (high dword) |
1660 | mov [esi+36], eax ; file size (high dword) |
1661 | test ebp, ebp |
1661 | test ebp, ebp |
1662 | jz .ret |
1662 | jz .ret |
1663 | push ecx edi |
1663 | push ecx edi |
1664 | lea edi, [esi+40] |
1664 | lea edi, [esi+40] |
1665 | mov esi, ebp |
1665 | mov esi, ebp |
1666 | test byte [esi-4], 1 |
1666 | test byte [esi-4], 1 |
1667 | jz .ansi |
1667 | jz .ansi |
1668 | mov ecx, 260/2 |
1668 | mov ecx, 260/2 |
1669 | rep movsd |
1669 | rep movsd |
1670 | mov [edi-2], ax |
1670 | mov [edi-2], ax |
1671 | @@: |
1671 | @@: |
1672 | mov esi, edi |
1672 | mov esi, edi |
1673 | pop edi ecx |
1673 | pop edi ecx |
1674 | .ret: |
1674 | .ret: |
1675 | ret |
1675 | ret |
1676 | .ansi: |
1676 | .ansi: |
1677 | mov ecx, 264/4 |
1677 | mov ecx, 264/4 |
1678 | rep movsd |
1678 | rep movsd |
1679 | mov [edi-1], al |
1679 | mov [edi-1], al |
1680 | jmp @b |
1680 | jmp @b |
1681 | 1681 | ||
1682 | bdfe_to_fat_entry: |
1682 | bdfe_to_fat_entry: |
1683 | ; convert BDFE at edx to FAT entry at edi |
1683 | ; convert BDFE at edx to FAT entry at edi |
1684 | ; destroys eax |
1684 | ; destroys eax |
1685 | ; attributes byte |
1685 | ; attributes byte |
1686 | test byte [edi+11], 8 ; volume label? |
1686 | test byte [edi+11], 8 ; volume label? |
1687 | jnz @f |
1687 | jnz @f |
1688 | mov al, [edx] |
1688 | mov al, [edx] |
1689 | and al, 0x27 |
1689 | and al, 0x27 |
1690 | and byte [edi+11], 0x10 |
1690 | and byte [edi+11], 0x10 |
1691 | or byte [edi+11], al |
1691 | or byte [edi+11], al |
1692 | @@: |
1692 | @@: |
1693 | mov eax, [edx+8] |
1693 | mov eax, [edx+8] |
1694 | call bdfe_to_fat_time |
1694 | call bdfe_to_fat_time |
1695 | mov [edi+14], ax ; creation time |
1695 | mov [edi+14], ax ; creation time |
1696 | mov eax, [edx+12] |
1696 | mov eax, [edx+12] |
1697 | call bdfe_to_fat_date |
1697 | call bdfe_to_fat_date |
1698 | mov [edi+16], ax ; creation date |
1698 | mov [edi+16], ax ; creation date |
1699 | mov eax, [edx+20] |
1699 | mov eax, [edx+20] |
1700 | call bdfe_to_fat_date |
1700 | call bdfe_to_fat_date |
1701 | mov [edi+18], ax ; last access date |
1701 | mov [edi+18], ax ; last access date |
1702 | mov eax, [edx+24] |
1702 | mov eax, [edx+24] |
1703 | call bdfe_to_fat_time |
1703 | call bdfe_to_fat_time |
1704 | mov [edi+22], ax ; last write time |
1704 | mov [edi+22], ax ; last write time |
1705 | mov eax, [edx+28] |
1705 | mov eax, [edx+28] |
1706 | call bdfe_to_fat_date |
1706 | call bdfe_to_fat_date |
1707 | mov [edi+24], ax ; last write date |
1707 | mov [edi+24], ax ; last write date |
1708 | ret |
1708 | ret |
1709 | 1709 | ||
1710 | hd_find_lfn: |
1710 | hd_find_lfn: |
1711 | ; in: ebp -> FAT structure |
1711 | ; in: ebp -> FAT structure |
1712 | ; in: esi+[esp+4] -> name |
1712 | ; in: esi+[esp+4] -> name |
1713 | ; out: CF=1 - file not found, eax=error code |
1713 | ; out: CF=1 - file not found, eax=error code |
1714 | ; else CF=0 and edi->direntry, eax=sector |
1714 | ; else CF=0 and edi->direntry, eax=sector |
1715 | ; destroys eax |
1715 | ; destroys eax |
1716 | push esi edi |
1716 | push esi edi |
1717 | push 0 |
1717 | push 0 |
1718 | push 0 |
1718 | push 0 |
1719 | push fat1x_root_first |
1719 | push fat1x_root_first |
1720 | push fat1x_root_next |
1720 | push fat1x_root_next |
1721 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1721 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1722 | cmp [ebp+FAT.fs_type], 32 |
1722 | cmp [ebp+FAT.fs_type], 32 |
1723 | jz .fat32 |
1723 | jz .fat32 |
1724 | .loop: |
1724 | .loop: |
1725 | and [ebp+FAT.longname_sec1], 0 |
1725 | and [ebp+FAT.longname_sec1], 0 |
1726 | and [ebp+FAT.longname_sec2], 0 |
1726 | and [ebp+FAT.longname_sec2], 0 |
1727 | call fat_find_lfn |
1727 | call fat_find_lfn |
1728 | jc .notfound |
1728 | jc .notfound |
1729 | cmp byte [esi], 0 |
1729 | cmp byte [esi], 0 |
1730 | jz .found |
1730 | jz .found |
1731 | .continue: |
1731 | .continue: |
1732 | test byte [edi+11], 10h |
1732 | test byte [edi+11], 10h |
1733 | jz .notfound |
1733 | jz .notfound |
1734 | and dword [esp+12], 0 |
1734 | and dword [esp+12], 0 |
1735 | mov eax, [edi+20-2] |
1735 | mov eax, [edi+20-2] |
1736 | mov ax, [edi+26] ; cluster |
1736 | mov ax, [edi+26] ; cluster |
1737 | .fat32: |
1737 | .fat32: |
1738 | mov [esp+8], eax |
1738 | mov [esp+8], eax |
1739 | mov dword [esp+4], fat_notroot_first |
1739 | mov dword [esp+4], fat_notroot_first |
1740 | mov dword [esp], fat_notroot_next |
1740 | mov dword [esp], fat_notroot_next |
1741 | jmp .loop |
1741 | jmp .loop |
1742 | .notfound: |
1742 | .notfound: |
1743 | add esp, 16 |
1743 | add esp, 16 |
1744 | pop edi esi |
1744 | pop edi esi |
1745 | stc |
1745 | stc |
1746 | ret 4 |
1746 | ret 4 |
1747 | .found: |
1747 | .found: |
1748 | lea eax, [esp+4+24] |
1748 | lea eax, [esp+4+24] |
1749 | cmp dword [eax], 0 |
1749 | cmp dword [eax], 0 |
1750 | jz @f |
1750 | jz @f |
1751 | mov esi, [eax] |
1751 | mov esi, [eax] |
1752 | and dword [eax], 0 |
1752 | and dword [eax], 0 |
1753 | jmp .continue |
1753 | jmp .continue |
1754 | @@: |
1754 | @@: |
1755 | lea eax, [esp+8] |
1755 | lea eax, [esp+8] |
1756 | cmp dword [eax], 0 |
1756 | cmp dword [eax], 0 |
1757 | jz .root |
1757 | jz .root |
1758 | call fat_get_sector |
1758 | call fat_get_sector |
1759 | jmp .cmn |
1759 | jmp .cmn |
1760 | .root: |
1760 | .root: |
1761 | mov eax, [eax+4] |
1761 | mov eax, [eax+4] |
1762 | add eax, [ebp+FAT.ROOT_START] |
1762 | add eax, [ebp+FAT.ROOT_START] |
1763 | .cmn: |
1763 | .cmn: |
1764 | add esp, 20 ; CF=0 |
1764 | add esp, 20 ; CF=0 |
1765 | pop esi |
1765 | pop esi |
1766 | ret 4 |
1766 | ret 4 |
1767 | 1767 | ||
1768 | ;---------------------------------------------------------------- |
1768 | ;---------------------------------------------------------------- |
1769 | ; fat_Read - FAT implementation of reading a file |
1769 | ; fat_Read - FAT implementation of reading a file |
1770 | ; in: ebp = pointer to FAT structure |
1770 | ; in: ebp = pointer to FAT structure |
1771 | ; in: esi+[esp+4] = name |
1771 | ; in: esi+[esp+4] = name |
1772 | ; in: ebx = pointer to parameters from sysfunc 70 |
1772 | ; in: ebx = pointer to parameters from sysfunc 70 |
1773 | ; out: eax, ebx = return values for sysfunc 70 |
1773 | ; out: eax, ebx = return values for sysfunc 70 |
1774 | ;---------------------------------------------------------------- |
1774 | ;---------------------------------------------------------------- |
1775 | fat_Read: |
1775 | fat_Read: |
1776 | call fat_lock |
1776 | call fat_lock |
1777 | push edi |
1777 | push edi |
1778 | cmp byte [esi], 0 |
1778 | cmp byte [esi], 0 |
1779 | jnz @f |
1779 | jnz @f |
1780 | .noaccess: |
1780 | .noaccess: |
1781 | pop edi |
1781 | pop edi |
1782 | call fat_unlock |
1782 | call fat_unlock |
1783 | or ebx, -1 |
1783 | or ebx, -1 |
1784 | mov eax, ERROR_ACCESS_DENIED |
1784 | mov eax, ERROR_ACCESS_DENIED |
1785 | ret |
1785 | ret |
1786 | @@: |
1786 | @@: |
1787 | stdcall hd_find_lfn, [esp+8] |
1787 | stdcall hd_find_lfn, [esp+8] |
1788 | jnc .found |
1788 | jnc .found |
1789 | pop edi |
1789 | pop edi |
1790 | push eax |
1790 | push eax |
1791 | call fat_unlock |
1791 | call fat_unlock |
1792 | pop eax |
1792 | pop eax |
1793 | or ebx, -1 |
1793 | or ebx, -1 |
1794 | ret |
1794 | ret |
1795 | .found: |
1795 | .found: |
1796 | test byte [edi+11], 0x10 ; do not allow read directories |
1796 | test byte [edi+11], 0x10 ; do not allow read directories |
1797 | jnz .noaccess |
1797 | jnz .noaccess |
1798 | cmp dword [ebx+8], 0 |
1798 | cmp dword [ebx+8], 0 |
1799 | jz @f |
1799 | jz @f |
1800 | xor ebx, ebx |
1800 | xor ebx, ebx |
1801 | call fat_unlock |
1801 | call fat_unlock |
1802 | mov eax, ERROR_END_OF_FILE |
1802 | mov eax, ERROR_END_OF_FILE |
1803 | pop edi |
1803 | pop edi |
1804 | ret |
1804 | ret |
1805 | @@: |
1805 | @@: |
1806 | mov edx, [ebx+4] ; file offset |
1806 | mov edx, [ebx+4] ; file offset |
1807 | mov ecx, [ebx+12] ; size |
1807 | mov ecx, [ebx+12] ; size |
1808 | mov ebx, [ebx+16] ; buffer |
1808 | mov ebx, [ebx+16] ; buffer |
1809 | push ebx |
1809 | push ebx |
1810 | push 0 |
1810 | push 0 |
- | 1811 | test ecx, ecx |
|
- | 1812 | jz .done |
|
1811 | mov eax, [edi+28] |
1813 | mov eax, [edi+28] |
1812 | sub eax, edx |
1814 | sub eax, edx |
1813 | jb .fileEnd |
1815 | jb .fileEnd |
1814 | cmp eax, ecx |
1816 | cmp eax, ecx |
1815 | jae @f |
1817 | jae @f |
1816 | mov ecx, eax |
1818 | mov ecx, eax |
1817 | mov byte [esp], 6 |
1819 | mov byte [esp], 6 |
1818 | @@: |
1820 | @@: |
1819 | mov eax, [edi+20-2] |
1821 | mov eax, [edi+20-2] |
1820 | mov ax, [edi+26] |
1822 | mov ax, [edi+26] |
1821 | ; now eax=cluster, ebx=buffer for data, ecx=count, edx=position |
1823 | ; now eax=cluster, ebx=buffer for data, ecx=count, edx=position |
1822 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
1824 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
1823 | shl edi, 9 |
1825 | shl edi, 9 |
1824 | @@: |
1826 | @@: |
1825 | cmp eax, 2 |
1827 | cmp eax, 2 |
1826 | jb .fileEnd |
1828 | jb .fileEnd |
1827 | cmp eax, [ebp+FAT.fatRESERVED] |
1829 | cmp eax, [ebp+FAT.fatRESERVED] |
1828 | jae .fileEnd |
1830 | jae .fileEnd |
1829 | sub edx, edi |
1831 | sub edx, edi |
1830 | jc @f |
1832 | jc @f |
1831 | call get_FAT |
1833 | call get_FAT |
1832 | jc .noaccess2 |
1834 | jc .noaccess2 |
1833 | jmp @b |
1835 | jmp @b |
1834 | @@: |
1836 | @@: |
1835 | mov esi, eax |
1837 | mov esi, eax |
1836 | dec eax |
1838 | dec eax |
1837 | dec eax |
1839 | dec eax |
1838 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1840 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1839 | add eax, [ebp+FAT.DATA_START] |
1841 | add eax, [ebp+FAT.DATA_START] |
1840 | add edx, edi |
1842 | add edx, edi |
1841 | jz .alignedCluster |
1843 | jz .alignedCluster |
1842 | mov edi, edx |
1844 | mov edi, edx |
1843 | shr edi, 9 |
1845 | shr edi, 9 |
1844 | add eax, edi |
1846 | add eax, edi |
1845 | and edx, 511 |
1847 | and edx, 511 |
1846 | cmp ecx, 512 |
1848 | cmp ecx, 512 |
1847 | jc .sectorPiece |
1849 | jc .sectorPiece |
1848 | test edx, edx |
1850 | test edx, edx |
1849 | jz .alignedSector |
1851 | jz .alignedSector |
1850 | .sectorPiece: |
1852 | .sectorPiece: |
1851 | push eax ebx |
1853 | push eax ebx |
1852 | lea ebx, [ebp+FAT.buffer] |
1854 | lea ebx, [ebp+FAT.buffer] |
1853 | call fs_read32_app |
1855 | call fs_read32_app |
1854 | test eax, eax |
1856 | test eax, eax |
1855 | mov eax, ebx |
1857 | mov eax, ebx |
1856 | pop ebx |
1858 | pop ebx |
1857 | jne .noaccess3 |
1859 | jne .noaccess3 |
1858 | add eax, edx |
1860 | add eax, edx |
1859 | push ecx |
1861 | push ecx |
1860 | add ecx, edx |
1862 | add ecx, edx |
1861 | cmp ecx, 512 |
1863 | cmp ecx, 512 |
1862 | jbe @f |
1864 | jbe @f |
1863 | mov ecx, 512 |
1865 | mov ecx, 512 |
1864 | @@: |
1866 | @@: |
1865 | sub ecx, edx |
1867 | sub ecx, edx |
1866 | call memmove |
1868 | call memmove |
1867 | sub [esp], ecx |
1869 | sub [esp], ecx |
1868 | add ebx, ecx |
1870 | add ebx, ecx |
1869 | pop ecx eax |
1871 | pop ecx eax |
1870 | xor edx, edx |
1872 | xor edx, edx |
1871 | inc edi |
1873 | inc edi |
1872 | inc eax |
1874 | inc eax |
1873 | test ecx, ecx |
1875 | test ecx, ecx |
1874 | jz .done |
1876 | jz .done |
1875 | .alignedSector: |
1877 | .alignedSector: |
1876 | shl edi, 9 |
1878 | shl edi, 9 |
1877 | add ecx, edi |
1879 | add ecx, edi |
1878 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
1880 | mov edi, [ebp+FAT.SECTORS_PER_CLUSTER] |
1879 | shl edi, 9 |
1881 | shl edi, 9 |
1880 | .alignedCluster: |
1882 | .alignedCluster: |
1881 | cmp ecx, 512 |
1883 | cmp ecx, 512 |
1882 | jc .sectorPiece |
1884 | jc .sectorPiece |
1883 | mov edx, eax |
1885 | mov edx, eax |
1884 | mov eax, esi |
1886 | mov eax, esi |
1885 | @@: |
1887 | @@: |
1886 | sub ecx, edi |
1888 | sub ecx, edi |
1887 | jbe .readEnd |
1889 | jbe .readEnd |
1888 | call get_FAT |
1890 | call get_FAT |
1889 | jc .noaccess4 |
1891 | jc .noaccess4 |
1890 | cmp eax, 2 |
1892 | cmp eax, 2 |
1891 | jb .fileEnd2 |
1893 | jb .fileEnd2 |
1892 | cmp eax, [ebp+FAT.fatRESERVED] |
1894 | cmp eax, [ebp+FAT.fatRESERVED] |
1893 | jae .fileEnd2 |
1895 | jae .fileEnd2 |
1894 | inc esi |
1896 | inc esi |
1895 | cmp eax, esi |
1897 | cmp eax, esi |
1896 | jz @b |
1898 | jz @b |
1897 | .fragmentEnd: |
1899 | .fragmentEnd: |
1898 | xchg eax, esi |
1900 | xchg eax, esi |
1899 | dec eax |
1901 | dec eax |
1900 | dec eax |
1902 | dec eax |
1901 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1903 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1902 | add eax, [ebp+FAT.DATA_START] |
1904 | add eax, [ebp+FAT.DATA_START] |
1903 | push ecx |
1905 | push ecx |
1904 | mov ecx, eax |
1906 | mov ecx, eax |
1905 | mov eax, esi |
1907 | mov eax, esi |
1906 | dec eax |
1908 | dec eax |
1907 | dec eax |
1909 | dec eax |
1908 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1910 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1909 | add eax, [ebp+FAT.DATA_START] |
1911 | add eax, [ebp+FAT.DATA_START] |
1910 | push eax |
1912 | push eax |
1911 | .readFragment: |
1913 | .readFragment: |
1912 | sub ecx, edx |
1914 | sub ecx, edx |
1913 | mov eax, edx |
1915 | mov eax, edx |
1914 | xor edx, edx |
1916 | xor edx, edx |
1915 | call fs_read64_app |
1917 | call fs_read64_app |
1916 | shl ecx, 9 |
1918 | shl ecx, 9 |
1917 | add ebx, ecx |
1919 | add ebx, ecx |
1918 | test eax, eax |
1920 | test eax, eax |
1919 | pop eax |
1921 | pop eax |
1920 | jnz .noaccess3 |
1922 | jnz .noaccess3 |
1921 | pop ecx |
1923 | pop ecx |
1922 | xor edx, edx |
1924 | xor edx, edx |
1923 | jcxz .done |
1925 | jecxz .done |
1924 | jmp .alignedCluster |
1926 | jmp .alignedCluster |
1925 | .readEnd: |
1927 | .readEnd: |
1926 | add ecx, edi |
1928 | add ecx, edi |
1927 | mov edi, ecx |
1929 | mov edi, ecx |
1928 | and ecx, 511 |
1930 | and ecx, 511 |
1929 | shr edi, 9 |
1931 | shr edi, 9 |
1930 | dec eax |
1932 | dec eax |
1931 | dec eax |
1933 | dec eax |
1932 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1934 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
1933 | add eax, [ebp+FAT.DATA_START] |
1935 | add eax, [ebp+FAT.DATA_START] |
1934 | add eax, edi |
1936 | add eax, edi |
1935 | push ecx |
1937 | push ecx |
1936 | push eax |
1938 | push eax |
1937 | mov ecx, eax |
1939 | mov ecx, eax |
1938 | jmp .readFragment |
1940 | jmp .readFragment |
1939 | .noaccess3: |
1941 | .noaccess3: |
1940 | pop eax |
1942 | pop eax |
1941 | .noaccess2: |
1943 | .noaccess2: |
1942 | mov byte [esp], ERROR_DEVICE |
1944 | mov byte [esp], ERROR_DEVICE |
1943 | .done: |
1945 | .done: |
1944 | call fat_unlock |
1946 | call fat_unlock |
1945 | pop eax edx edi |
1947 | pop eax edx edi |
1946 | sub ebx, edx |
1948 | sub ebx, edx |
1947 | ret |
1949 | ret |
1948 | .fileEnd: |
1950 | .fileEnd: |
1949 | mov byte [esp], ERROR_END_OF_FILE |
1951 | mov byte [esp], ERROR_END_OF_FILE |
1950 | jmp .done |
1952 | jmp .done |
1951 | .noaccess4: |
1953 | .noaccess4: |
1952 | mov byte [esp], ERROR_DEVICE |
1954 | mov byte [esp], ERROR_DEVICE |
1953 | jmp @f |
1955 | jmp @f |
1954 | .fileEnd2: |
1956 | .fileEnd2: |
1955 | mov byte [esp], ERROR_END_OF_FILE |
1957 | mov byte [esp], ERROR_END_OF_FILE |
1956 | @@: |
1958 | @@: |
1957 | inc esi |
1959 | inc esi |
1958 | xor ecx, ecx |
1960 | xor ecx, ecx |
1959 | jmp .fragmentEnd |
1961 | jmp .fragmentEnd |
1960 | 1962 | ||
1961 | ;---------------------------------------------------------------- |
1963 | ;---------------------------------------------------------------- |
1962 | ; fat_ReadFolder - FAT implementation of reading a folder |
1964 | ; fat_ReadFolder - FAT implementation of reading a folder |
1963 | ; in: ebp = pointer to FAT structure |
1965 | ; in: ebp = pointer to FAT structure |
1964 | ; in: esi+[esp+4] = name |
1966 | ; in: esi+[esp+4] = name |
1965 | ; in: ebx = pointer to parameters from sysfunc 70 |
1967 | ; in: ebx = pointer to parameters from sysfunc 70 |
1966 | ; out: eax, ebx = return values for sysfunc 70 |
1968 | ; out: eax, ebx = return values for sysfunc 70 |
1967 | ;---------------------------------------------------------------- |
1969 | ;---------------------------------------------------------------- |
1968 | fat_ReadFolder: |
1970 | fat_ReadFolder: |
1969 | call fat_lock |
1971 | call fat_lock |
1970 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1972 | mov eax, [ebp+FAT.ROOT_CLUSTER] |
1971 | push edi |
1973 | push edi |
1972 | cmp byte [esi], 0 |
1974 | cmp byte [esi], 0 |
1973 | jz .doit |
1975 | jz .doit |
1974 | stdcall hd_find_lfn, [esp+4+4] |
1976 | stdcall hd_find_lfn, [esp+4+4] |
1975 | jnc .found |
1977 | jnc .found |
1976 | pop edi |
1978 | pop edi |
1977 | push eax |
1979 | push eax |
1978 | call fat_unlock |
1980 | call fat_unlock |
1979 | pop eax |
1981 | pop eax |
1980 | or ebx, -1 |
1982 | or ebx, -1 |
1981 | ret |
1983 | ret |
1982 | .found: |
1984 | .found: |
1983 | test byte [edi+11], 0x10 ; do not allow read files |
1985 | test byte [edi+11], 0x10 ; do not allow read files |
1984 | jnz .found_dir |
1986 | jnz .found_dir |
1985 | pop edi |
1987 | pop edi |
1986 | call fat_unlock |
1988 | call fat_unlock |
1987 | or ebx, -1 |
1989 | or ebx, -1 |
1988 | mov eax, ERROR_ACCESS_DENIED |
1990 | mov eax, ERROR_ACCESS_DENIED |
1989 | ret |
1991 | ret |
1990 | .found_dir: |
1992 | .found_dir: |
1991 | mov eax, [edi+20-2] |
1993 | mov eax, [edi+20-2] |
1992 | mov ax, [edi+26] ; eax=cluster |
1994 | mov ax, [edi+26] ; eax=cluster |
1993 | .doit: |
1995 | .doit: |
1994 | push esi |
1996 | push esi |
1995 | sub esp, 262*2 ; reserve space for LFN |
1997 | sub esp, 262*2 ; reserve space for LFN |
1996 | push dword [ebx+8] ; for fat_get_name: read ANSI/UNICODE name |
1998 | push dword [ebx+8] ; for fat_get_name: read ANSI/UNICODE name |
1997 | mov edx, [ebx+16] ; pointer to buffer |
1999 | mov edx, [ebx+16] ; pointer to buffer |
1998 | ; init header |
2000 | ; init header |
1999 | push eax |
2001 | push eax |
2000 | mov edi, edx |
2002 | mov edi, edx |
2001 | mov ecx, 32/4 |
2003 | mov ecx, 32/4 |
2002 | xor eax, eax |
2004 | xor eax, eax |
2003 | rep stosd |
2005 | rep stosd |
2004 | pop eax |
2006 | pop eax |
2005 | mov byte [edx], 1 ; version |
2007 | mov byte [edx], 1 ; version |
2006 | mov esi, edi ; esi points to BDFE |
2008 | mov esi, edi ; esi points to BDFE |
2007 | mov ecx, [ebx+12] ; number of blocks to read |
2009 | mov ecx, [ebx+12] ; number of blocks to read |
2008 | mov ebx, [ebx+4] ; index of the first block |
2010 | mov ebx, [ebx+4] ; index of the first block |
2009 | .new_cluster: |
2011 | .new_cluster: |
2010 | mov [ebp+FAT.cluster_tmp], eax |
2012 | mov [ebp+FAT.cluster_tmp], eax |
2011 | test eax, eax |
2013 | test eax, eax |
2012 | jnz @f |
2014 | jnz @f |
2013 | cmp [ebp+FAT.fs_type], 32 |
2015 | cmp [ebp+FAT.fs_type], 32 |
2014 | jz .notfound |
2016 | jz .notfound |
2015 | mov eax, [ebp+FAT.ROOT_START] |
2017 | mov eax, [ebp+FAT.ROOT_START] |
2016 | push [ebp+FAT.ROOT_SECTORS] |
2018 | push [ebp+FAT.ROOT_SECTORS] |
2017 | push ebx |
2019 | push ebx |
2018 | jmp .new_sector |
2020 | jmp .new_sector |
2019 | @@: |
2021 | @@: |
2020 | dec eax |
2022 | dec eax |
2021 | dec eax |
2023 | dec eax |
2022 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2024 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2023 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
2025 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
2024 | add eax, [ebp+FAT.DATA_START] |
2026 | add eax, [ebp+FAT.DATA_START] |
2025 | push ebx |
2027 | push ebx |
2026 | .new_sector: |
2028 | .new_sector: |
2027 | lea ebx, [ebp+FAT.buffer] |
2029 | lea ebx, [ebp+FAT.buffer] |
2028 | mov edi, ebx |
2030 | mov edi, ebx |
2029 | push eax |
2031 | push eax |
2030 | call fs_read32_sys |
2032 | call fs_read32_sys |
2031 | test eax, eax |
2033 | test eax, eax |
2032 | pop eax |
2034 | pop eax |
2033 | jnz .notfound2 |
2035 | jnz .notfound2 |
2034 | add ebx, 512 |
2036 | add ebx, 512 |
2035 | push eax |
2037 | push eax |
2036 | .l1: |
2038 | .l1: |
2037 | push ebp |
2039 | push ebp |
2038 | lea ebp, [esp+20] |
2040 | lea ebp, [esp+20] |
2039 | call fat_get_name |
2041 | call fat_get_name |
2040 | pop ebp |
2042 | pop ebp |
2041 | jc .l2 |
2043 | jc .l2 |
2042 | cmp byte [edi+11], 0xF |
2044 | cmp byte [edi+11], 0xF |
2043 | jnz .do_bdfe |
2045 | jnz .do_bdfe |
2044 | add edi, 0x20 |
2046 | add edi, 0x20 |
2045 | cmp edi, ebx |
2047 | cmp edi, ebx |
2046 | jb .do_bdfe |
2048 | jb .do_bdfe |
2047 | pop eax |
2049 | pop eax |
2048 | inc eax |
2050 | inc eax |
2049 | dec dword [esp+4] |
2051 | dec dword [esp+4] |
2050 | jnz @f |
2052 | jnz @f |
2051 | mov eax, [ebp+FAT.cluster_tmp] |
2053 | mov eax, [ebp+FAT.cluster_tmp] |
2052 | test eax, eax |
2054 | test eax, eax |
2053 | jz .done |
2055 | jz .done |
2054 | call get_FAT |
2056 | call get_FAT |
2055 | jc .notfound2 |
2057 | jc .notfound2 |
2056 | cmp eax, 2 |
2058 | cmp eax, 2 |
2057 | jb .done |
2059 | jb .done |
2058 | cmp eax, [ebp+FAT.fatRESERVED] |
2060 | cmp eax, [ebp+FAT.fatRESERVED] |
2059 | jae .done |
2061 | jae .done |
2060 | push eax |
2062 | push eax |
2061 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2063 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2062 | mov [esp+8], eax |
2064 | mov [esp+8], eax |
2063 | pop eax |
2065 | pop eax |
2064 | mov [ebp+FAT.cluster_tmp], eax |
2066 | mov [ebp+FAT.cluster_tmp], eax |
2065 | dec eax |
2067 | dec eax |
2066 | dec eax |
2068 | dec eax |
2067 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2069 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2068 | add eax, [ebp+FAT.DATA_START] |
2070 | add eax, [ebp+FAT.DATA_START] |
2069 | @@: |
2071 | @@: |
2070 | lea ebx, [ebp+FAT.buffer] |
2072 | lea ebx, [ebp+FAT.buffer] |
2071 | mov edi, ebx |
2073 | mov edi, ebx |
2072 | push eax |
2074 | push eax |
2073 | call fs_read32_sys |
2075 | call fs_read32_sys |
2074 | test eax, eax |
2076 | test eax, eax |
2075 | pop eax |
2077 | pop eax |
2076 | jnz .notfound2 |
2078 | jnz .notfound2 |
2077 | add ebx, 512 |
2079 | add ebx, 512 |
2078 | push eax |
2080 | push eax |
2079 | .do_bdfe: |
2081 | .do_bdfe: |
2080 | inc dword [edx+8] ; new file found |
2082 | inc dword [edx+8] ; new file found |
2081 | dec dword [esp+4] |
2083 | dec dword [esp+4] |
2082 | jns .l2 |
2084 | jns .l2 |
2083 | dec ecx |
2085 | dec ecx |
2084 | js .l2 |
2086 | js .l2 |
2085 | inc dword [edx+4] ; new file block copied |
2087 | inc dword [edx+4] ; new file block copied |
2086 | push ebp |
2088 | push ebp |
2087 | lea ebp, [esp+20] |
2089 | lea ebp, [esp+20] |
2088 | call fat_entry_to_bdfe |
2090 | call fat_entry_to_bdfe |
2089 | pop ebp |
2091 | pop ebp |
2090 | .l2: |
2092 | .l2: |
2091 | add edi, 0x20 |
2093 | add edi, 0x20 |
2092 | cmp edi, ebx |
2094 | cmp edi, ebx |
2093 | jb .l1 |
2095 | jb .l1 |
2094 | pop eax |
2096 | pop eax |
2095 | inc eax |
2097 | inc eax |
2096 | dec dword [esp+4] |
2098 | dec dword [esp+4] |
2097 | jnz .new_sector |
2099 | jnz .new_sector |
2098 | mov eax, [ebp+FAT.cluster_tmp] |
2100 | mov eax, [ebp+FAT.cluster_tmp] |
2099 | test eax, eax |
2101 | test eax, eax |
2100 | jz .done |
2102 | jz .done |
2101 | call get_FAT |
2103 | call get_FAT |
2102 | jc .notfound2 |
2104 | jc .notfound2 |
2103 | cmp eax, 2 |
2105 | cmp eax, 2 |
2104 | jb .done |
2106 | jb .done |
2105 | cmp eax, [ebp+FAT.fatRESERVED] |
2107 | cmp eax, [ebp+FAT.fatRESERVED] |
2106 | jae .done |
2108 | jae .done |
2107 | push eax |
2109 | push eax |
2108 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2110 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2109 | mov [esp+8], eax |
2111 | mov [esp+8], eax |
2110 | pop eax |
2112 | pop eax |
2111 | pop ebx |
2113 | pop ebx |
2112 | add esp, 4 |
2114 | add esp, 4 |
2113 | jmp .new_cluster |
2115 | jmp .new_cluster |
2114 | .notfound2: |
2116 | .notfound2: |
2115 | add esp, 8 |
2117 | add esp, 8 |
2116 | .notfound: |
2118 | .notfound: |
2117 | add esp, 262*2+4 |
2119 | add esp, 262*2+4 |
2118 | pop esi edi |
2120 | pop esi edi |
2119 | mov ebx, [edx+4] |
2121 | mov ebx, [edx+4] |
2120 | call fat_unlock |
2122 | call fat_unlock |
2121 | mov eax, ERROR_DEVICE |
2123 | mov eax, ERROR_DEVICE |
2122 | ret |
2124 | ret |
2123 | .done: |
2125 | .done: |
2124 | add esp, 262*2+4+8 |
2126 | add esp, 262*2+4+8 |
2125 | mov ebx, [edx+4] |
2127 | mov ebx, [edx+4] |
2126 | xor eax, eax |
2128 | xor eax, eax |
2127 | dec ecx |
2129 | dec ecx |
2128 | js @f |
2130 | js @f |
2129 | mov al, ERROR_END_OF_FILE |
2131 | mov al, ERROR_END_OF_FILE |
2130 | @@: |
2132 | @@: |
2131 | push eax |
2133 | push eax |
2132 | call fat_unlock |
2134 | call fat_unlock |
2133 | pop eax |
2135 | pop eax |
2134 | pop esi edi |
2136 | pop esi edi |
2135 | ret |
2137 | ret |
2136 | 2138 | ||
2137 | fat1x_root_next: |
2139 | fat1x_root_next: |
2138 | push ecx |
2140 | push ecx |
2139 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2141 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2140 | cmp edi, ecx |
2142 | cmp edi, ecx |
2141 | jae fat1x_root_next_sector |
2143 | jae fat1x_root_next_sector |
2142 | pop ecx |
2144 | pop ecx |
2143 | add edi, 0x20 |
2145 | add edi, 0x20 |
2144 | ret ; CF=0 |
2146 | ret ; CF=0 |
2145 | fat1x_root_next_sector: |
2147 | fat1x_root_next_sector: |
2146 | ; read next sector |
2148 | ; read next sector |
2147 | push [ebp+FAT.longname_sec2] |
2149 | push [ebp+FAT.longname_sec2] |
2148 | pop [ebp+FAT.longname_sec1] |
2150 | pop [ebp+FAT.longname_sec1] |
2149 | mov ecx, [eax+4] |
2151 | mov ecx, [eax+4] |
2150 | push ecx |
2152 | push ecx |
2151 | add ecx, [ebp+FAT.ROOT_START] |
2153 | add ecx, [ebp+FAT.ROOT_START] |
2152 | mov [ebp+FAT.longname_sec2], ecx |
2154 | mov [ebp+FAT.longname_sec2], ecx |
2153 | pop ecx |
2155 | pop ecx |
2154 | inc ecx |
2156 | inc ecx |
2155 | mov [eax+4], ecx |
2157 | mov [eax+4], ecx |
2156 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
2158 | cmp ecx, [ebp+FAT.ROOT_SECTORS] |
2157 | pop ecx |
2159 | pop ecx |
2158 | jb fat1x_root_first |
2160 | jb fat1x_root_first |
2159 | mov eax, ERROR_FILE_NOT_FOUND |
2161 | mov eax, ERROR_FILE_NOT_FOUND |
2160 | stc |
2162 | stc |
2161 | ret |
2163 | ret |
2162 | fat1x_root_first: |
2164 | fat1x_root_first: |
2163 | mov eax, [eax+4] |
2165 | mov eax, [eax+4] |
2164 | add eax, [ebp+FAT.ROOT_START] |
2166 | add eax, [ebp+FAT.ROOT_START] |
2165 | push ebx |
2167 | push ebx |
2166 | lea edi, [ebp+FAT.buffer] |
2168 | lea edi, [ebp+FAT.buffer] |
2167 | mov ebx, edi |
2169 | mov ebx, edi |
2168 | call fs_read32_sys |
2170 | call fs_read32_sys |
2169 | pop ebx |
2171 | pop ebx |
2170 | test eax, eax |
2172 | test eax, eax |
2171 | jnz .readerr |
2173 | jnz .readerr |
2172 | ret ; CF=0 |
2174 | ret ; CF=0 |
2173 | .readerr: |
2175 | .readerr: |
2174 | mov eax, ERROR_DEVICE |
2176 | mov eax, ERROR_DEVICE |
2175 | stc |
2177 | stc |
2176 | ret |
2178 | ret |
2177 | .notfound: |
2179 | .notfound: |
2178 | mov eax, ERROR_FILE_NOT_FOUND |
2180 | mov eax, ERROR_FILE_NOT_FOUND |
2179 | stc |
2181 | stc |
2180 | ret |
2182 | ret |
2181 | fat1x_root_begin_write: |
2183 | fat1x_root_begin_write: |
2182 | push edi eax |
2184 | push edi eax |
2183 | call fat1x_root_first |
2185 | call fat1x_root_first |
2184 | pop eax edi |
2186 | pop eax edi |
2185 | ret |
2187 | ret |
2186 | fat1x_root_end_write: |
2188 | fat1x_root_end_write: |
2187 | pusha |
2189 | pusha |
2188 | mov eax, [eax+4] |
2190 | mov eax, [eax+4] |
2189 | add eax, [ebp+FAT.ROOT_START] |
2191 | add eax, [ebp+FAT.ROOT_START] |
2190 | lea ebx, [ebp+FAT.buffer] |
2192 | lea ebx, [ebp+FAT.buffer] |
2191 | call fs_write32_sys |
2193 | call fs_write32_sys |
2192 | popa |
2194 | popa |
2193 | ret |
2195 | ret |
2194 | fat1x_root_next_write: |
2196 | fat1x_root_next_write: |
2195 | push ecx |
2197 | push ecx |
2196 | lea ecx, [ebp+FAT.buffer+0x200] |
2198 | lea ecx, [ebp+FAT.buffer+0x200] |
2197 | cmp edi, ecx |
2199 | cmp edi, ecx |
2198 | jae @f |
2200 | jae @f |
2199 | pop ecx |
2201 | pop ecx |
2200 | ret |
2202 | ret |
2201 | @@: |
2203 | @@: |
2202 | call fat1x_root_end_write |
2204 | call fat1x_root_end_write |
2203 | jmp fat1x_root_next_sector |
2205 | jmp fat1x_root_next_sector |
2204 | fat1x_root_extend_dir: |
2206 | fat1x_root_extend_dir: |
2205 | stc |
2207 | stc |
2206 | ret |
2208 | ret |
2207 | 2209 | ||
2208 | fat_notroot_next: |
2210 | fat_notroot_next: |
2209 | push ecx |
2211 | push ecx |
2210 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2212 | lea ecx, [ebp+FAT.buffer+0x200-0x20] |
2211 | cmp edi, ecx |
2213 | cmp edi, ecx |
2212 | jae fat_notroot_next_sector |
2214 | jae fat_notroot_next_sector |
2213 | pop ecx |
2215 | pop ecx |
2214 | add edi, 0x20 |
2216 | add edi, 0x20 |
2215 | ret ; CF=0 |
2217 | ret ; CF=0 |
2216 | fat_notroot_next_sector: |
2218 | fat_notroot_next_sector: |
2217 | push [ebp+FAT.longname_sec2] |
2219 | push [ebp+FAT.longname_sec2] |
2218 | pop [ebp+FAT.longname_sec1] |
2220 | pop [ebp+FAT.longname_sec1] |
2219 | push eax |
2221 | push eax |
2220 | call fat_get_sector |
2222 | call fat_get_sector |
2221 | mov [ebp+FAT.longname_sec2], eax |
2223 | mov [ebp+FAT.longname_sec2], eax |
2222 | pop eax |
2224 | pop eax |
2223 | mov ecx, [eax+4] |
2225 | mov ecx, [eax+4] |
2224 | inc ecx |
2226 | inc ecx |
2225 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2227 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2226 | jae fat_notroot_next_cluster |
2228 | jae fat_notroot_next_cluster |
2227 | mov [eax+4], ecx |
2229 | mov [eax+4], ecx |
2228 | jmp @f |
2230 | jmp @f |
2229 | fat_notroot_next_cluster: |
2231 | fat_notroot_next_cluster: |
2230 | push eax |
2232 | push eax |
2231 | mov eax, [eax] |
2233 | mov eax, [eax] |
2232 | call get_FAT |
2234 | call get_FAT |
2233 | mov ecx, eax |
2235 | mov ecx, eax |
2234 | pop eax |
2236 | pop eax |
2235 | jc fat_notroot_first.deverr |
2237 | jc fat_notroot_first.deverr |
2236 | cmp ecx, 2 |
2238 | cmp ecx, 2 |
2237 | jb fat_notroot_next_err |
2239 | jb fat_notroot_next_err |
2238 | cmp ecx, [ebp+FAT.fatRESERVED] |
2240 | cmp ecx, [ebp+FAT.fatRESERVED] |
2239 | jae fat_notroot_next_err |
2241 | jae fat_notroot_next_err |
2240 | mov [eax], ecx |
2242 | mov [eax], ecx |
2241 | and dword [eax+4], 0 |
2243 | and dword [eax+4], 0 |
2242 | @@: |
2244 | @@: |
2243 | pop ecx |
2245 | pop ecx |
2244 | fat_notroot_first: |
2246 | fat_notroot_first: |
2245 | call fat_get_sector |
2247 | call fat_get_sector |
2246 | push ebx |
2248 | push ebx |
2247 | lea edi, [ebp+FAT.buffer] |
2249 | lea edi, [ebp+FAT.buffer] |
2248 | mov ebx, edi |
2250 | mov ebx, edi |
2249 | call fs_read32_sys |
2251 | call fs_read32_sys |
2250 | pop ebx |
2252 | pop ebx |
2251 | test eax, eax |
2253 | test eax, eax |
2252 | jz .ret ; CF=0 |
2254 | jz .ret ; CF=0 |
2253 | push ecx |
2255 | push ecx |
2254 | .deverr: |
2256 | .deverr: |
2255 | pop ecx |
2257 | pop ecx |
2256 | mov eax, ERROR_DEVICE |
2258 | mov eax, ERROR_DEVICE |
2257 | stc |
2259 | stc |
2258 | .ret: |
2260 | .ret: |
2259 | ret |
2261 | ret |
2260 | fat_notroot_next_err: |
2262 | fat_notroot_next_err: |
2261 | pop ecx |
2263 | pop ecx |
2262 | mov eax, ERROR_FILE_NOT_FOUND |
2264 | mov eax, ERROR_FILE_NOT_FOUND |
2263 | stc |
2265 | stc |
2264 | ret |
2266 | ret |
2265 | fat_notroot_begin_write: |
2267 | fat_notroot_begin_write: |
2266 | push eax edi |
2268 | push eax edi |
2267 | call fat_notroot_first |
2269 | call fat_notroot_first |
2268 | pop edi eax |
2270 | pop edi eax |
2269 | ret |
2271 | ret |
2270 | fat_notroot_end_write: |
2272 | fat_notroot_end_write: |
2271 | call fat_get_sector |
2273 | call fat_get_sector |
2272 | push ebx |
2274 | push ebx |
2273 | lea ebx, [ebp+FAT.buffer] |
2275 | lea ebx, [ebp+FAT.buffer] |
2274 | call fs_write32_sys |
2276 | call fs_write32_sys |
2275 | pop ebx |
2277 | pop ebx |
2276 | ret |
2278 | ret |
2277 | fat_notroot_next_write: |
2279 | fat_notroot_next_write: |
2278 | push ecx |
2280 | push ecx |
2279 | lea ecx, [ebp+FAT.buffer+0x200] |
2281 | lea ecx, [ebp+FAT.buffer+0x200] |
2280 | cmp edi, ecx |
2282 | cmp edi, ecx |
2281 | jae @f |
2283 | jae @f |
2282 | pop ecx |
2284 | pop ecx |
2283 | ret |
2285 | ret |
2284 | @@: |
2286 | @@: |
2285 | push eax |
2287 | push eax |
2286 | call fat_notroot_end_write |
2288 | call fat_notroot_end_write |
2287 | pop eax |
2289 | pop eax |
2288 | jmp fat_notroot_next_sector |
2290 | jmp fat_notroot_next_sector |
2289 | fat_notroot_extend_dir: |
2291 | fat_notroot_extend_dir: |
2290 | push eax |
2292 | push eax |
2291 | call get_free_FAT |
2293 | call get_free_FAT |
2292 | jnc .found |
2294 | jnc .found |
2293 | pop eax |
2295 | pop eax |
2294 | ret ; CF=1 |
2296 | ret ; CF=1 |
2295 | .found: |
2297 | .found: |
2296 | push edx |
2298 | push edx |
2297 | mov edx, [ebp+FAT.fatEND] |
2299 | mov edx, [ebp+FAT.fatEND] |
2298 | call set_FAT |
2300 | call set_FAT |
2299 | jc .writeerr |
2301 | jc .writeerr |
2300 | mov edx, eax |
2302 | mov edx, eax |
2301 | mov eax, [esp+4] |
2303 | mov eax, [esp+4] |
2302 | mov eax, [eax] |
2304 | mov eax, [eax] |
2303 | push edx |
2305 | push edx |
2304 | call set_FAT |
2306 | call set_FAT |
2305 | pop edx |
2307 | pop edx |
2306 | jnc @f |
2308 | jnc @f |
2307 | .writeerr: |
2309 | .writeerr: |
2308 | pop edx |
2310 | pop edx |
2309 | pop eax |
2311 | pop eax |
2310 | stc |
2312 | stc |
2311 | ret |
2313 | ret |
2312 | @@: |
2314 | @@: |
2313 | push ecx |
2315 | push ecx |
2314 | or ecx, -1 |
2316 | or ecx, -1 |
2315 | call add_disk_free_space |
2317 | call add_disk_free_space |
2316 | ; zero new cluster |
2318 | ; zero new cluster |
2317 | mov ecx, 512/4 |
2319 | mov ecx, 512/4 |
2318 | lea edi, [ebp+FAT.buffer] |
2320 | lea edi, [ebp+FAT.buffer] |
2319 | push edi |
2321 | push edi |
2320 | xor eax, eax |
2322 | xor eax, eax |
2321 | rep stosd |
2323 | rep stosd |
2322 | pop edi |
2324 | pop edi |
2323 | pop ecx |
2325 | pop ecx |
2324 | mov eax, [esp+4] |
2326 | mov eax, [esp+4] |
2325 | mov [eax], edx |
2327 | mov [eax], edx |
2326 | and dword [eax+4], 0 |
2328 | and dword [eax+4], 0 |
2327 | pop edx |
2329 | pop edx |
2328 | mov eax, [eax] |
2330 | mov eax, [eax] |
2329 | dec eax |
2331 | dec eax |
2330 | dec eax |
2332 | dec eax |
2331 | push ebx ecx |
2333 | push ebx ecx |
2332 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2334 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2333 | imul eax, ecx |
2335 | imul eax, ecx |
2334 | add eax, [ebp+FAT.DATA_START] |
2336 | add eax, [ebp+FAT.DATA_START] |
2335 | mov ebx, edi |
2337 | mov ebx, edi |
2336 | @@: |
2338 | @@: |
2337 | push eax |
2339 | push eax |
2338 | call fs_write32_sys |
2340 | call fs_write32_sys |
2339 | pop eax |
2341 | pop eax |
2340 | inc eax |
2342 | inc eax |
2341 | loop @b |
2343 | loop @b |
2342 | pop ecx ebx eax |
2344 | pop ecx ebx eax |
2343 | clc |
2345 | clc |
2344 | ret |
2346 | ret |
2345 | 2347 | ||
2346 | fat_get_sector: |
2348 | fat_get_sector: |
2347 | push ecx |
2349 | push ecx |
2348 | mov ecx, [eax] |
2350 | mov ecx, [eax] |
2349 | dec ecx |
2351 | dec ecx |
2350 | dec ecx |
2352 | dec ecx |
2351 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2353 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2352 | add ecx, [ebp+FAT.DATA_START] |
2354 | add ecx, [ebp+FAT.DATA_START] |
2353 | add ecx, [eax+4] |
2355 | add ecx, [eax+4] |
2354 | mov eax, ecx |
2356 | mov eax, ecx |
2355 | pop ecx |
2357 | pop ecx |
2356 | ret |
2358 | ret |
2357 | 2359 | ||
2358 | fshrad: |
2360 | fshrad: |
2359 | call fat_unlock |
2361 | call fat_unlock |
2360 | mov eax, ERROR_ACCESS_DENIED |
2362 | mov eax, ERROR_ACCESS_DENIED |
2361 | xor ebx, ebx |
2363 | xor ebx, ebx |
2362 | ret |
2364 | ret |
2363 | 2365 | ||
2364 | ;---------------------------------------------------------------- |
2366 | ;---------------------------------------------------------------- |
2365 | ; fat_CreateFolder - FAT implementation of creating a folder |
2367 | ; fat_CreateFolder - FAT implementation of creating a folder |
2366 | ; in: ebp = pointer to FAT structure |
2368 | ; in: ebp = pointer to FAT structure |
2367 | ; in: esi+[esp+4] = name |
2369 | ; in: esi+[esp+4] = name |
2368 | ; in: ebx = pointer to parameters from sysfunc 70 |
2370 | ; in: ebx = pointer to parameters from sysfunc 70 |
2369 | ; out: eax, ebx = return values for sysfunc 70 |
2371 | ; out: eax, ebx = return values for sysfunc 70 |
2370 | ;---------------------------------------------------------------- |
2372 | ;---------------------------------------------------------------- |
2371 | fat_CreateFolder: |
2373 | fat_CreateFolder: |
2372 | push 1 |
2374 | push 1 |
2373 | jmp fat_Rewrite.common |
2375 | jmp fat_Rewrite.common |
2374 | 2376 | ||
2375 | ;---------------------------------------------------------------- |
2377 | ;---------------------------------------------------------------- |
2376 | ; fat_Rewrite - FAT implementation of creating a new file |
2378 | ; fat_Rewrite - FAT implementation of creating a new file |
2377 | ; in: ebp = pointer to FAT structure |
2379 | ; in: ebp = pointer to FAT structure |
2378 | ; in: esi+[esp+4] = name |
2380 | ; in: esi+[esp+4] = name |
2379 | ; in: ebx = pointer to parameters from sysfunc 70 |
2381 | ; in: ebx = pointer to parameters from sysfunc 70 |
2380 | ; out: eax, ebx = return values for sysfunc 70 |
2382 | ; out: eax, ebx = return values for sysfunc 70 |
2381 | ;---------------------------------------------------------------- |
2383 | ;---------------------------------------------------------------- |
2382 | fat_Rewrite: |
2384 | fat_Rewrite: |
2383 | push 0 |
2385 | push 0 |
2384 | .common: |
2386 | .common: |
2385 | call fat_lock |
2387 | call fat_lock |
2386 | pop eax |
2388 | pop eax |
2387 | cmp byte [esi], 0 |
2389 | cmp byte [esi], 0 |
2388 | jz fshrad |
2390 | jz fshrad |
2389 | mov ecx, [ebx+12] |
2391 | mov ecx, [ebx+12] |
2390 | mov edx, [ebx+16] |
2392 | mov edx, [ebx+16] |
2391 | pushad |
2393 | pushad |
2392 | xor edi, edi |
2394 | xor edi, edi |
2393 | mov edx, [esp+4+20h] |
2395 | mov edx, [esp+4+20h] |
2394 | push esi |
2396 | push esi |
2395 | test edx, edx |
2397 | test edx, edx |
2396 | jz @f |
2398 | jz @f |
2397 | mov esi, edx |
2399 | mov esi, edx |
2398 | @@: |
2400 | @@: |
2399 | lodsb |
2401 | lodsb |
2400 | test al, al |
2402 | test al, al |
2401 | jz @f |
2403 | jz @f |
2402 | cmp al, '/' |
2404 | cmp al, '/' |
2403 | jnz @b |
2405 | jnz @b |
2404 | lea edi, [esi-1] |
2406 | lea edi, [esi-1] |
2405 | jmp @b |
2407 | jmp @b |
2406 | @@: |
2408 | @@: |
2407 | pop esi |
2409 | pop esi |
2408 | test edi, edi |
2410 | test edi, edi |
2409 | jnz .noroot |
2411 | jnz .noroot |
2410 | test edx, edx |
2412 | test edx, edx |
2411 | jnz .hasebp |
2413 | jnz .hasebp |
2412 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
2414 | mov edx, [ebp+FAT.ROOT_CLUSTER] |
2413 | cmp [ebp+FAT.fs_type], 32 |
2415 | cmp [ebp+FAT.fs_type], 32 |
2414 | jz .pushnotroot |
2416 | jz .pushnotroot |
2415 | xor edx, edx |
2417 | xor edx, edx |
2416 | push edx |
2418 | push edx |
2417 | push fat1x_root_extend_dir |
2419 | push fat1x_root_extend_dir |
2418 | push fat1x_root_end_write |
2420 | push fat1x_root_end_write |
2419 | push fat1x_root_next_write |
2421 | push fat1x_root_next_write |
2420 | push fat1x_root_begin_write |
2422 | push fat1x_root_begin_write |
2421 | push edx |
2423 | push edx |
2422 | push edx |
2424 | push edx |
2423 | push fat1x_root_first |
2425 | push fat1x_root_first |
2424 | push fat1x_root_next |
2426 | push fat1x_root_next |
2425 | jmp .common1 |
2427 | jmp .common1 |
2426 | .hasebp: |
2428 | .hasebp: |
2427 | mov eax, ERROR_ACCESS_DENIED |
2429 | mov eax, ERROR_ACCESS_DENIED |
2428 | cmp byte [edx], 0 |
2430 | cmp byte [edx], 0 |
2429 | jz .ret1 |
2431 | jz .ret1 |
2430 | stdcall hd_find_lfn, 0 |
2432 | stdcall hd_find_lfn, 0 |
2431 | mov esi, [esp+4+20h] |
2433 | mov esi, [esp+4+20h] |
2432 | jc .ret1 |
2434 | jc .ret1 |
2433 | jmp .common0 |
2435 | jmp .common0 |
2434 | .noroot: |
2436 | .noroot: |
2435 | mov eax, ERROR_ACCESS_DENIED |
2437 | mov eax, ERROR_ACCESS_DENIED |
2436 | cmp byte [edi+1], 0 |
2438 | cmp byte [edi+1], 0 |
2437 | jz .ret1 |
2439 | jz .ret1 |
2438 | ; check existence |
2440 | ; check existence |
2439 | mov byte [edi], 0 |
2441 | mov byte [edi], 0 |
2440 | push edi |
2442 | push edi |
2441 | stdcall hd_find_lfn, [esp+4+24h] |
2443 | stdcall hd_find_lfn, [esp+4+24h] |
2442 | pop esi |
2444 | pop esi |
2443 | mov byte [esi], '/' |
2445 | mov byte [esi], '/' |
2444 | jnc @f |
2446 | jnc @f |
2445 | .notfound0: |
2447 | .notfound0: |
2446 | mov eax, ERROR_FILE_NOT_FOUND |
2448 | mov eax, ERROR_FILE_NOT_FOUND |
2447 | .ret1: |
2449 | .ret1: |
2448 | mov [esp+28], eax |
2450 | mov [esp+28], eax |
2449 | call fat_unlock |
2451 | call fat_unlock |
2450 | popad |
2452 | popad |
2451 | xor ebx, ebx |
2453 | xor ebx, ebx |
2452 | ret |
2454 | ret |
2453 | @@: |
2455 | @@: |
2454 | inc esi |
2456 | inc esi |
2455 | .common0: |
2457 | .common0: |
2456 | test byte [edi+11], 0x10 ; must be directory |
2458 | test byte [edi+11], 0x10 ; must be directory |
2457 | mov eax, ERROR_ACCESS_DENIED |
2459 | mov eax, ERROR_ACCESS_DENIED |
2458 | jz .ret1 |
2460 | jz .ret1 |
2459 | mov edx, [edi+20-2] |
2461 | mov edx, [edi+20-2] |
2460 | mov dx, [edi+26] ; ebp=cluster |
2462 | mov dx, [edi+26] ; ebp=cluster |
2461 | mov eax, ERROR_FAT_TABLE |
2463 | mov eax, ERROR_FAT_TABLE |
2462 | cmp edx, 2 |
2464 | cmp edx, 2 |
2463 | jb .ret1 |
2465 | jb .ret1 |
2464 | .pushnotroot: |
2466 | .pushnotroot: |
2465 | push edx |
2467 | push edx |
2466 | push fat_notroot_extend_dir |
2468 | push fat_notroot_extend_dir |
2467 | push fat_notroot_end_write |
2469 | push fat_notroot_end_write |
2468 | push fat_notroot_next_write |
2470 | push fat_notroot_next_write |
2469 | push fat_notroot_begin_write |
2471 | push fat_notroot_begin_write |
2470 | push 0 |
2472 | push 0 |
2471 | push edx |
2473 | push edx |
2472 | push fat_notroot_first |
2474 | push fat_notroot_first |
2473 | push fat_notroot_next |
2475 | push fat_notroot_next |
2474 | .common1: |
2476 | .common1: |
2475 | call fat_find_lfn |
2477 | call fat_find_lfn |
2476 | jc .notfound |
2478 | jc .notfound |
2477 | ; found |
2479 | ; found |
2478 | test byte [edi+11], 10h |
2480 | test byte [edi+11], 10h |
2479 | jz .exists_file |
2481 | jz .exists_file |
2480 | ; found directory; if we are creating directory, return OK, |
2482 | ; found directory; if we are creating directory, return OK, |
2481 | ; if we are creating file, say "access denied" |
2483 | ; if we are creating file, say "access denied" |
2482 | add esp, 36 |
2484 | add esp, 36 |
2483 | call fat_unlock |
2485 | call fat_unlock |
2484 | popad |
2486 | popad |
2485 | test al, al |
2487 | test al, al |
2486 | mov eax, ERROR_ACCESS_DENIED |
2488 | mov eax, ERROR_ACCESS_DENIED |
2487 | jz @f |
2489 | jz @f |
2488 | mov al, 0 |
2490 | mov al, 0 |
2489 | @@: |
2491 | @@: |
2490 | xor ebx, ebx |
2492 | xor ebx, ebx |
2491 | ret |
2493 | ret |
2492 | .exists_file: |
2494 | .exists_file: |
2493 | ; found file; if we are creating directory, return "access denied", |
2495 | ; found file; if we are creating directory, return "access denied", |
2494 | ; if we are creating file, delete existing file and continue |
2496 | ; if we are creating file, delete existing file and continue |
2495 | cmp byte [esp+36+28], 0 |
2497 | cmp byte [esp+36+28], 0 |
2496 | jz @f |
2498 | jz @f |
2497 | add esp, 36 |
2499 | add esp, 36 |
2498 | call fat_unlock |
2500 | call fat_unlock |
2499 | popad |
2501 | popad |
2500 | mov eax, ERROR_ACCESS_DENIED |
2502 | mov eax, ERROR_ACCESS_DENIED |
2501 | xor ebx, ebx |
2503 | xor ebx, ebx |
2502 | ret |
2504 | ret |
2503 | @@: |
2505 | @@: |
2504 | ; delete FAT chain |
2506 | ; delete FAT chain |
2505 | push edi |
2507 | push edi |
2506 | xor eax, eax |
2508 | xor eax, eax |
2507 | mov dword [edi+28], eax ; zero size |
2509 | mov dword [edi+28], eax ; zero size |
2508 | xor ecx, ecx |
2510 | xor ecx, ecx |
2509 | mov eax, [edi+20-2] |
2511 | mov eax, [edi+20-2] |
2510 | mov ax, [edi+26] |
2512 | mov ax, [edi+26] |
2511 | mov word [edi+20], cx |
2513 | mov word [edi+20], cx |
2512 | mov word [edi+26], cx |
2514 | mov word [edi+26], cx |
2513 | test eax, eax |
2515 | test eax, eax |
2514 | jz .done1 |
2516 | jz .done1 |
2515 | @@: |
2517 | @@: |
2516 | cmp eax, [ebp+FAT.fatRESERVED] |
2518 | cmp eax, [ebp+FAT.fatRESERVED] |
2517 | jae .done1 |
2519 | jae .done1 |
2518 | push edx |
2520 | push edx |
2519 | xor edx, edx |
2521 | xor edx, edx |
2520 | call set_FAT |
2522 | call set_FAT |
2521 | mov eax, edx |
2523 | mov eax, edx |
2522 | pop edx |
2524 | pop edx |
2523 | jc .done1 |
2525 | jc .done1 |
2524 | inc ecx |
2526 | inc ecx |
2525 | jmp @b |
2527 | jmp @b |
2526 | .done1: |
2528 | .done1: |
2527 | pop edi |
2529 | pop edi |
2528 | call get_time_for_file |
2530 | call get_time_for_file |
2529 | mov [edi+22], ax |
2531 | mov [edi+22], ax |
2530 | call get_date_for_file |
2532 | call get_date_for_file |
2531 | mov [edi+24], ax |
2533 | mov [edi+24], ax |
2532 | mov [edi+18], ax |
2534 | mov [edi+18], ax |
2533 | or byte [edi+11], 20h ; set 'archive' attribute |
2535 | or byte [edi+11], 20h ; set 'archive' attribute |
2534 | jmp .doit |
2536 | jmp .doit |
2535 | .notfound: |
2537 | .notfound: |
2536 | ; file is not found; generate short name |
2538 | ; file is not found; generate short name |
2537 | call fat_name_is_legal |
2539 | call fat_name_is_legal |
2538 | jc @f |
2540 | jc @f |
2539 | add esp, 36 |
2541 | add esp, 36 |
2540 | call fat_unlock |
2542 | call fat_unlock |
2541 | popad |
2543 | popad |
2542 | mov eax, ERROR_FILE_NOT_FOUND |
2544 | mov eax, ERROR_FILE_NOT_FOUND |
2543 | xor ebx, ebx |
2545 | xor ebx, ebx |
2544 | ret |
2546 | ret |
2545 | @@: |
2547 | @@: |
2546 | sub esp, 12 |
2548 | sub esp, 12 |
2547 | mov edi, esp |
2549 | mov edi, esp |
2548 | call fat_gen_short_name |
2550 | call fat_gen_short_name |
2549 | .test_short_name_loop: |
2551 | .test_short_name_loop: |
2550 | push esi edi ecx |
2552 | push esi edi ecx |
2551 | mov esi, edi |
2553 | mov esi, edi |
2552 | lea eax, [esp+12+12+8] |
2554 | lea eax, [esp+12+12+8] |
2553 | mov edx, [eax+24] |
2555 | mov edx, [eax+24] |
2554 | mov [eax], edx |
2556 | mov [eax], edx |
2555 | and dword [eax+4], 0 |
2557 | and dword [eax+4], 0 |
2556 | call dword [eax-4] |
2558 | call dword [eax-4] |
2557 | jc .found |
2559 | jc .found |
2558 | .test_short_name_entry: |
2560 | .test_short_name_entry: |
2559 | cmp byte [edi+11], 0xF |
2561 | cmp byte [edi+11], 0xF |
2560 | jz .test_short_name_cont |
2562 | jz .test_short_name_cont |
2561 | mov ecx, 11 |
2563 | mov ecx, 11 |
2562 | push esi edi |
2564 | push esi edi |
2563 | repz cmpsb |
2565 | repz cmpsb |
2564 | pop edi esi |
2566 | pop edi esi |
2565 | jz .short_name_found |
2567 | jz .short_name_found |
2566 | .test_short_name_cont: |
2568 | .test_short_name_cont: |
2567 | lea eax, [esp+12+12+8] |
2569 | lea eax, [esp+12+12+8] |
2568 | call dword [eax-8] |
2570 | call dword [eax-8] |
2569 | jnc .test_short_name_entry |
2571 | jnc .test_short_name_entry |
2570 | jmp .found |
2572 | jmp .found |
2571 | .short_name_found: |
2573 | .short_name_found: |
2572 | pop ecx edi esi |
2574 | pop ecx edi esi |
2573 | call fat_next_short_name |
2575 | call fat_next_short_name |
2574 | jnc .test_short_name_loop |
2576 | jnc .test_short_name_loop |
2575 | .disk_full: |
2577 | .disk_full: |
2576 | add esp, 12+36 |
2578 | add esp, 12+36 |
2577 | call fat_unlock |
2579 | call fat_unlock |
2578 | popa |
2580 | popa |
2579 | mov eax, ERROR_DISK_FULL |
2581 | mov eax, ERROR_DISK_FULL |
2580 | xor ebx, ebx |
2582 | xor ebx, ebx |
2581 | ret |
2583 | ret |
2582 | .found: |
2584 | .found: |
2583 | pop ecx edi esi |
2585 | pop ecx edi esi |
2584 | ; now find space in directory |
2586 | ; now find space in directory |
2585 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
2587 | ; we need to save LFN <=> LFN is not equal to short name <=> generated name contains '~' |
2586 | mov al, '~' |
2588 | mov al, '~' |
2587 | push ecx edi |
2589 | push ecx edi |
2588 | mov ecx, 8 |
2590 | mov ecx, 8 |
2589 | repnz scasb |
2591 | repnz scasb |
2590 | movi eax, 1 ; 1 entry |
2592 | movi eax, 1 ; 1 entry |
2591 | jnz .notilde |
2593 | jnz .notilde |
2592 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
2594 | ; we need ceil(strlen(esi)/13) additional entries = floor((strlen(esi)+12+13)/13) total |
2593 | xor eax, eax |
2595 | xor eax, eax |
2594 | @@: |
2596 | @@: |
2595 | cmp byte [esi], 0 |
2597 | cmp byte [esi], 0 |
2596 | jz @f |
2598 | jz @f |
2597 | inc esi |
2599 | inc esi |
2598 | inc eax |
2600 | inc eax |
2599 | jmp @b |
2601 | jmp @b |
2600 | @@: |
2602 | @@: |
2601 | sub esi, eax |
2603 | sub esi, eax |
2602 | add eax, 12+13 |
2604 | add eax, 12+13 |
2603 | mov ecx, 13 |
2605 | mov ecx, 13 |
2604 | push edx |
2606 | push edx |
2605 | cdq |
2607 | cdq |
2606 | div ecx |
2608 | div ecx |
2607 | pop edx |
2609 | pop edx |
2608 | .notilde: |
2610 | .notilde: |
2609 | push -1 |
2611 | push -1 |
2610 | push -1 |
2612 | push -1 |
2611 | push -1 |
2613 | push -1 |
2612 | ; find |
2614 | ; find |
2613 | xor ecx, ecx |
2615 | xor ecx, ecx |
2614 | push eax |
2616 | push eax |
2615 | lea eax, [esp+16+8+12+8] |
2617 | lea eax, [esp+16+8+12+8] |
2616 | mov edx, [eax+24] |
2618 | mov edx, [eax+24] |
2617 | mov [eax], edx |
2619 | mov [eax], edx |
2618 | and dword [eax+4], 0 |
2620 | and dword [eax+4], 0 |
2619 | call dword [eax-4] |
2621 | call dword [eax-4] |
2620 | pop eax |
2622 | pop eax |
2621 | jnc .scan_dir |
2623 | jnc .scan_dir |
2622 | .fsfrfe3: |
2624 | .fsfrfe3: |
2623 | add esp, 12+8+12+36 |
2625 | add esp, 12+8+12+36 |
2624 | call fat_unlock |
2626 | call fat_unlock |
2625 | popad |
2627 | popad |
2626 | mov eax, ERROR_DEVICE |
2628 | mov eax, ERROR_DEVICE |
2627 | xor ebx, ebx |
2629 | xor ebx, ebx |
2628 | ret |
2630 | ret |
2629 | .scan_dir: |
2631 | .scan_dir: |
2630 | cmp byte [edi], 0 |
2632 | cmp byte [edi], 0 |
2631 | jz .free |
2633 | jz .free |
2632 | cmp byte [edi], 0xE5 |
2634 | cmp byte [edi], 0xE5 |
2633 | jz .free |
2635 | jz .free |
2634 | xor ecx, ecx |
2636 | xor ecx, ecx |
2635 | .scan_cont: |
2637 | .scan_cont: |
2636 | push eax |
2638 | push eax |
2637 | lea eax, [esp+16+8+12+8] |
2639 | lea eax, [esp+16+8+12+8] |
2638 | call dword [eax-8] |
2640 | call dword [eax-8] |
2639 | mov edx, eax |
2641 | mov edx, eax |
2640 | pop eax |
2642 | pop eax |
2641 | jnc .scan_dir |
2643 | jnc .scan_dir |
2642 | cmp edx, ERROR_DEVICE |
2644 | cmp edx, ERROR_DEVICE |
2643 | jz .fsfrfe3 |
2645 | jz .fsfrfe3 |
2644 | push eax |
2646 | push eax |
2645 | lea eax, [esp+16+8+12+8] |
2647 | lea eax, [esp+16+8+12+8] |
2646 | call dword [eax+20] ; extend directory |
2648 | call dword [eax+20] ; extend directory |
2647 | pop eax |
2649 | pop eax |
2648 | jnc .scan_dir |
2650 | jnc .scan_dir |
2649 | add esp, 12+8+12+36 |
2651 | add esp, 12+8+12+36 |
2650 | call fat_unlock |
2652 | call fat_unlock |
2651 | popad |
2653 | popad |
2652 | mov eax, ERROR_DISK_FULL |
2654 | mov eax, ERROR_DISK_FULL |
2653 | xor ebx, ebx |
2655 | xor ebx, ebx |
2654 | ret |
2656 | ret |
2655 | .free: |
2657 | .free: |
2656 | test ecx, ecx |
2658 | test ecx, ecx |
2657 | jnz @f |
2659 | jnz @f |
2658 | mov [esp], edi |
2660 | mov [esp], edi |
2659 | mov ecx, [esp+12+8+12+8] |
2661 | mov ecx, [esp+12+8+12+8] |
2660 | mov [esp+4], ecx |
2662 | mov [esp+4], ecx |
2661 | mov ecx, [esp+12+8+12+12] |
2663 | mov ecx, [esp+12+8+12+12] |
2662 | mov [esp+8], ecx |
2664 | mov [esp+8], ecx |
2663 | xor ecx, ecx |
2665 | xor ecx, ecx |
2664 | @@: |
2666 | @@: |
2665 | inc ecx |
2667 | inc ecx |
2666 | cmp ecx, eax |
2668 | cmp ecx, eax |
2667 | jb .scan_cont |
2669 | jb .scan_cont |
2668 | ; found! |
2670 | ; found! |
2669 | push esi ecx |
2671 | push esi ecx |
2670 | ; If creating a directory, allocate one data cluster now and fail immediately |
2672 | ; If creating a directory, allocate one data cluster now and fail immediately |
2671 | ; if this is impossible. This prevents from creating an invalid directory entry |
2673 | ; if this is impossible. This prevents from creating an invalid directory entry |
2672 | ; on a full disk. |
2674 | ; on a full disk. |
2673 | ; yup, the argument is quite non-intuitive... but what should I do if |
2675 | ; yup, the argument is quite non-intuitive... but what should I do if |
2674 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
2676 | ; the entire function uses such arguments? BTW, it refers to al from pushad, |
2675 | ; which in turn is filled with 0 in fat_Rewrite and 1 in fat_CreateFolder. |
2677 | ; which in turn is filled with 0 in fat_Rewrite and 1 in fat_CreateFolder. |
2676 | cmp byte [esp+8+12+8+12+36+28], 0 |
2678 | cmp byte [esp+8+12+8+12+36+28], 0 |
2677 | jz .no.preallocate.folder.data |
2679 | jz .no.preallocate.folder.data |
2678 | call get_free_FAT |
2680 | call get_free_FAT |
2679 | jnc @f |
2681 | jnc @f |
2680 | add esp, 8+12+8 |
2682 | add esp, 8+12+8 |
2681 | jmp .disk_full |
2683 | jmp .disk_full |
2682 | @@: |
2684 | @@: |
2683 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
2685 | mov [esp+8+12+8+12+36+20], eax ; store the cluster somewhere |
2684 | .no.preallocate.folder.data: |
2686 | .no.preallocate.folder.data: |
2685 | ; calculate name checksum |
2687 | ; calculate name checksum |
2686 | mov esi, [esp+8+12] |
2688 | mov esi, [esp+8+12] |
2687 | mov ecx, 11 |
2689 | mov ecx, 11 |
2688 | xor eax, eax |
2690 | xor eax, eax |
2689 | @@: |
2691 | @@: |
2690 | ror al, 1 |
2692 | ror al, 1 |
2691 | add al, [esi] |
2693 | add al, [esi] |
2692 | inc esi |
2694 | inc esi |
2693 | loop @b |
2695 | loop @b |
2694 | pop ecx esi |
2696 | pop ecx esi |
2695 | pop edi |
2697 | pop edi |
2696 | pop dword [esp+8+12+12] |
2698 | pop dword [esp+8+12+12] |
2697 | pop dword [esp+8+12+12] |
2699 | pop dword [esp+8+12+12] |
2698 | ; edi points to first entry in free chunk |
2700 | ; edi points to first entry in free chunk |
2699 | dec ecx |
2701 | dec ecx |
2700 | jz .nolfn |
2702 | jz .nolfn |
2701 | push esi |
2703 | push esi |
2702 | push eax |
2704 | push eax |
2703 | lea eax, [esp+8+8+12+8] |
2705 | lea eax, [esp+8+8+12+8] |
2704 | call dword [eax+8] ; begin write |
2706 | call dword [eax+8] ; begin write |
2705 | mov al, 40h |
2707 | mov al, 40h |
2706 | .writelfn: |
2708 | .writelfn: |
2707 | or al, cl |
2709 | or al, cl |
2708 | mov esi, [esp+4] |
2710 | mov esi, [esp+4] |
2709 | push ecx |
2711 | push ecx |
2710 | dec ecx |
2712 | dec ecx |
2711 | imul ecx, 13 |
2713 | imul ecx, 13 |
2712 | add esi, ecx |
2714 | add esi, ecx |
2713 | stosb |
2715 | stosb |
2714 | mov cl, 5 |
2716 | mov cl, 5 |
2715 | call fat_read_symbols |
2717 | call fat_read_symbols |
2716 | mov ax, 0xF |
2718 | mov ax, 0xF |
2717 | stosw |
2719 | stosw |
2718 | mov al, [esp+4] |
2720 | mov al, [esp+4] |
2719 | stosb |
2721 | stosb |
2720 | mov cl, 6 |
2722 | mov cl, 6 |
2721 | call fat_read_symbols |
2723 | call fat_read_symbols |
2722 | xor eax, eax |
2724 | xor eax, eax |
2723 | stosw |
2725 | stosw |
2724 | mov cl, 2 |
2726 | mov cl, 2 |
2725 | call fat_read_symbols |
2727 | call fat_read_symbols |
2726 | pop ecx |
2728 | pop ecx |
2727 | lea eax, [esp+8+8+12+8] |
2729 | lea eax, [esp+8+8+12+8] |
2728 | call dword [eax+12] ; next write |
2730 | call dword [eax+12] ; next write |
2729 | xor eax, eax |
2731 | xor eax, eax |
2730 | loop .writelfn |
2732 | loop .writelfn |
2731 | pop eax |
2733 | pop eax |
2732 | pop esi |
2734 | pop esi |
2733 | ; lea eax, [esp+8+12+8] |
2735 | ; lea eax, [esp+8+12+8] |
2734 | ; call dword [eax+16] ; end write |
2736 | ; call dword [eax+16] ; end write |
2735 | .nolfn: |
2737 | .nolfn: |
2736 | xchg esi, [esp] |
2738 | xchg esi, [esp] |
2737 | mov ecx, 11 |
2739 | mov ecx, 11 |
2738 | rep movsb |
2740 | rep movsb |
2739 | mov word [edi], 20h ; attributes |
2741 | mov word [edi], 20h ; attributes |
2740 | sub edi, 11 |
2742 | sub edi, 11 |
2741 | pop esi ecx |
2743 | pop esi ecx |
2742 | add esp, 12 |
2744 | add esp, 12 |
2743 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
2745 | mov byte [edi+13], 0 ; tenths of a second at file creation time |
2744 | call get_time_for_file |
2746 | call get_time_for_file |
2745 | mov [edi+14], ax ; creation time |
2747 | mov [edi+14], ax ; creation time |
2746 | mov [edi+22], ax ; last write time |
2748 | mov [edi+22], ax ; last write time |
2747 | call get_date_for_file |
2749 | call get_date_for_file |
2748 | mov [edi+16], ax ; creation date |
2750 | mov [edi+16], ax ; creation date |
2749 | mov [edi+24], ax ; last write date |
2751 | mov [edi+24], ax ; last write date |
2750 | mov [edi+18], ax ; last access date |
2752 | mov [edi+18], ax ; last access date |
2751 | xor ecx, ecx |
2753 | xor ecx, ecx |
2752 | mov word [edi+20], cx ; high word of cluster |
2754 | mov word [edi+20], cx ; high word of cluster |
2753 | mov word [edi+26], cx ; low word of cluster - to be filled |
2755 | mov word [edi+26], cx ; low word of cluster - to be filled |
2754 | mov dword [edi+28], ecx ; file size - to be filled |
2756 | mov dword [edi+28], ecx ; file size - to be filled |
2755 | cmp byte [esp+36+28], cl |
2757 | cmp byte [esp+36+28], cl |
2756 | jz .doit |
2758 | jz .doit |
2757 | ; create directory |
2759 | ; create directory |
2758 | mov byte [edi+11], 10h ; attributes: folder |
2760 | mov byte [edi+11], 10h ; attributes: folder |
2759 | mov esi, edi |
2761 | mov esi, edi |
2760 | lea eax, [esp+8] |
2762 | lea eax, [esp+8] |
2761 | call dword [eax+16] ; flush directory |
2763 | call dword [eax+16] ; flush directory |
2762 | mov eax, [esp+36+20] ; extract saved cluster |
2764 | mov eax, [esp+36+20] ; extract saved cluster |
2763 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
2765 | mov [esp+36+20], edi ; this is needed for calculating arg of add_disk_free_space! |
2764 | push ecx |
2766 | push ecx |
2765 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2767 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2766 | shl ecx, 9 |
2768 | shl ecx, 9 |
2767 | push ecx |
2769 | push ecx |
2768 | push edi |
2770 | push edi |
2769 | jmp .doit2 |
2771 | jmp .doit2 |
2770 | .doit: |
2772 | .doit: |
2771 | mov esi, [esp+36+20] |
2773 | mov esi, [esp+36+20] |
2772 | lea eax, [esp+8] |
2774 | lea eax, [esp+8] |
2773 | call dword [eax+16] ; flush directory |
2775 | call dword [eax+16] ; flush directory |
2774 | push ecx |
2776 | push ecx |
2775 | mov ecx, [esp+4+36+24] |
2777 | mov ecx, [esp+4+36+24] |
2776 | push ecx |
2778 | push ecx |
2777 | push edi |
2779 | push edi |
2778 | test ecx, ecx |
2780 | test ecx, ecx |
2779 | jz .done |
2781 | jz .done |
2780 | call get_free_FAT |
2782 | call get_free_FAT |
2781 | jc .diskfull |
2783 | jc .diskfull |
2782 | .doit2: |
2784 | .doit2: |
2783 | push eax |
2785 | push eax |
2784 | mov [edi+26], ax |
2786 | mov [edi+26], ax |
2785 | shr eax, 16 |
2787 | shr eax, 16 |
2786 | mov [edi+20], ax |
2788 | mov [edi+20], ax |
2787 | lea eax, [esp+16+8] |
2789 | lea eax, [esp+16+8] |
2788 | call dword [eax+16] ; flush directory |
2790 | call dword [eax+16] ; flush directory |
2789 | pop eax |
2791 | pop eax |
2790 | push edx |
2792 | push edx |
2791 | mov edx, [ebp+FAT.fatEND] |
2793 | mov edx, [ebp+FAT.fatEND] |
2792 | call set_FAT |
2794 | call set_FAT |
2793 | pop edx |
2795 | pop edx |
2794 | .write_cluster: |
2796 | .write_cluster: |
2795 | push eax |
2797 | push eax |
2796 | dec eax |
2798 | dec eax |
2797 | dec eax |
2799 | dec eax |
2798 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2800 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
2799 | add eax, [ebp+FAT.DATA_START] |
2801 | add eax, [ebp+FAT.DATA_START] |
2800 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
2802 | push [ebp+FAT.SECTORS_PER_CLUSTER] |
2801 | ; write data |
2803 | ; write data |
2802 | .write_sector: |
2804 | .write_sector: |
2803 | cmp byte [esp+20+36+28], 0 |
2805 | cmp byte [esp+20+36+28], 0 |
2804 | jnz .writedir |
2806 | jnz .writedir |
2805 | mov ecx, 512 |
2807 | mov ecx, 512 |
2806 | cmp dword [esp+12], ecx |
2808 | cmp dword [esp+12], ecx |
2807 | jb .writeshort |
2809 | jb .writeshort |
2808 | ; we can write directly from given buffer |
2810 | ; we can write directly from given buffer |
2809 | mov ebx, esi |
2811 | mov ebx, esi |
2810 | add esi, ecx |
2812 | add esi, ecx |
2811 | jmp .writecommon |
2813 | jmp .writecommon |
2812 | .writeshort: |
2814 | .writeshort: |
2813 | mov ecx, [esp+12] |
2815 | mov ecx, [esp+12] |
2814 | push ecx |
2816 | push ecx |
2815 | lea edi, [ebp+FAT.buffer] |
2817 | lea edi, [ebp+FAT.buffer] |
2816 | mov ebx, edi |
2818 | mov ebx, edi |
2817 | rep movsb |
2819 | rep movsb |
2818 | .writedircont: |
2820 | .writedircont: |
2819 | lea ecx, [ebp+FAT.buffer+0x200] |
2821 | lea ecx, [ebp+FAT.buffer+0x200] |
2820 | sub ecx, edi |
2822 | sub ecx, edi |
2821 | push eax |
2823 | push eax |
2822 | xor eax, eax |
2824 | xor eax, eax |
2823 | rep stosb |
2825 | rep stosb |
2824 | pop eax |
2826 | pop eax |
2825 | pop ecx |
2827 | pop ecx |
2826 | .writecommon: |
2828 | .writecommon: |
2827 | push eax |
2829 | push eax |
2828 | call fs_write32_app |
2830 | call fs_write32_app |
2829 | test eax, eax |
2831 | test eax, eax |
2830 | pop eax |
2832 | pop eax |
2831 | jnz .writeerr |
2833 | jnz .writeerr |
2832 | inc eax |
2834 | inc eax |
2833 | sub dword [esp+12], ecx |
2835 | sub dword [esp+12], ecx |
2834 | jz .writedone |
2836 | jz .writedone |
2835 | dec dword [esp] |
2837 | dec dword [esp] |
2836 | jnz .write_sector |
2838 | jnz .write_sector |
2837 | pop eax |
2839 | pop eax |
2838 | ; allocate new cluster |
2840 | ; allocate new cluster |
2839 | pop eax |
2841 | pop eax |
2840 | mov ecx, eax |
2842 | mov ecx, eax |
2841 | call get_free_FAT |
2843 | call get_free_FAT |
2842 | jc .diskfull |
2844 | jc .diskfull |
2843 | push edx |
2845 | push edx |
2844 | mov edx, [ebp+FAT.fatEND] |
2846 | mov edx, [ebp+FAT.fatEND] |
2845 | call set_FAT |
2847 | call set_FAT |
2846 | xchg eax, ecx |
2848 | xchg eax, ecx |
2847 | mov edx, ecx |
2849 | mov edx, ecx |
2848 | call set_FAT |
2850 | call set_FAT |
2849 | pop edx |
2851 | pop edx |
2850 | xchg eax, ecx |
2852 | xchg eax, ecx |
2851 | jmp .write_cluster |
2853 | jmp .write_cluster |
2852 | .diskfull: |
2854 | .diskfull: |
2853 | mov eax, ERROR_DISK_FULL |
2855 | mov eax, ERROR_DISK_FULL |
2854 | jmp .ret |
2856 | jmp .ret |
2855 | .writeerr: |
2857 | .writeerr: |
2856 | pop eax eax |
2858 | pop eax eax |
2857 | sub esi, ecx |
2859 | sub esi, ecx |
2858 | mov eax, ERROR_DEVICE |
2860 | mov eax, ERROR_DEVICE |
2859 | jmp .ret |
2861 | jmp .ret |
2860 | .writedone: |
2862 | .writedone: |
2861 | pop eax eax |
2863 | pop eax eax |
2862 | .done: |
2864 | .done: |
2863 | xor eax, eax |
2865 | xor eax, eax |
2864 | .ret: |
2866 | .ret: |
2865 | pop edi ecx |
2867 | pop edi ecx |
2866 | sub esi, [esp+4+36+20] |
2868 | sub esi, [esp+4+36+20] |
2867 | mov [esp+4+36+28], eax |
2869 | mov [esp+4+36+28], eax |
2868 | mov [esp+4+36+16], esi |
2870 | mov [esp+4+36+16], esi |
2869 | lea eax, [esp+12] |
2871 | lea eax, [esp+12] |
2870 | call dword [eax+8] |
2872 | call dword [eax+8] |
2871 | mov [edi+28], esi |
2873 | mov [edi+28], esi |
2872 | call dword [eax+16] |
2874 | call dword [eax+16] |
2873 | mov [esp+36+16], ebx |
2875 | mov [esp+36+16], ebx |
2874 | lea eax, [esi+511] |
2876 | lea eax, [esi+511] |
2875 | shr eax, 9 |
2877 | shr eax, 9 |
2876 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2878 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2877 | lea eax, [eax+ecx-1] |
2879 | lea eax, [eax+ecx-1] |
2878 | xor edx, edx |
2880 | xor edx, edx |
2879 | div ecx |
2881 | div ecx |
2880 | pop ecx |
2882 | pop ecx |
2881 | sub ecx, eax |
2883 | sub ecx, eax |
2882 | call add_disk_free_space |
2884 | call add_disk_free_space |
2883 | add esp, 36 |
2885 | add esp, 36 |
2884 | call update_disk |
2886 | call update_disk |
2885 | call fat_unlock |
2887 | call fat_unlock |
2886 | popad |
2888 | popad |
2887 | ret |
2889 | ret |
2888 | .writedir: |
2890 | .writedir: |
2889 | push 512 |
2891 | push 512 |
2890 | lea edi, [ebp+FAT.buffer] |
2892 | lea edi, [ebp+FAT.buffer] |
2891 | mov ebx, edi |
2893 | mov ebx, edi |
2892 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2894 | mov ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
2893 | shl ecx, 9 |
2895 | shl ecx, 9 |
2894 | cmp ecx, [esp+16] |
2896 | cmp ecx, [esp+16] |
2895 | jnz .writedircont |
2897 | jnz .writedircont |
2896 | dec dword [esp+20] |
2898 | dec dword [esp+20] |
2897 | push esi |
2899 | push esi |
2898 | mov ecx, 32/4 |
2900 | mov ecx, 32/4 |
2899 | rep movsd |
2901 | rep movsd |
2900 | pop esi |
2902 | pop esi |
2901 | mov dword [edi-32], '. ' |
2903 | mov dword [edi-32], '. ' |
2902 | mov dword [edi-32+4], ' ' |
2904 | mov dword [edi-32+4], ' ' |
2903 | mov dword [edi-32+8], ' ' |
2905 | mov dword [edi-32+8], ' ' |
2904 | mov byte [edi-32+11], 10h |
2906 | mov byte [edi-32+11], 10h |
2905 | push esi |
2907 | push esi |
2906 | mov ecx, 32/4 |
2908 | mov ecx, 32/4 |
2907 | rep movsd |
2909 | rep movsd |
2908 | pop esi |
2910 | pop esi |
2909 | mov dword [edi-32], '.. ' |
2911 | mov dword [edi-32], '.. ' |
2910 | mov dword [edi-32+4], ' ' |
2912 | mov dword [edi-32+4], ' ' |
2911 | mov dword [edi-32+8], ' ' |
2913 | mov dword [edi-32+8], ' ' |
2912 | mov byte [edi-32+11], 10h |
2914 | mov byte [edi-32+11], 10h |
2913 | mov ecx, [esp+20+36] |
2915 | mov ecx, [esp+20+36] |
2914 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
2916 | cmp ecx, [ebp+FAT.ROOT_CLUSTER] |
2915 | jnz @f |
2917 | jnz @f |
2916 | xor ecx, ecx |
2918 | xor ecx, ecx |
2917 | @@: |
2919 | @@: |
2918 | mov word [edi-32+26], cx |
2920 | mov word [edi-32+26], cx |
2919 | shr ecx, 16 |
2921 | shr ecx, 16 |
2920 | mov [edi-32+20], cx |
2922 | mov [edi-32+20], cx |
2921 | jmp .writedircont |
2923 | jmp .writedircont |
2922 | 2924 | ||
2923 | fat_read_symbol: |
2925 | fat_read_symbol: |
2924 | or ax, -1 |
2926 | or ax, -1 |
2925 | test esi, esi |
2927 | test esi, esi |
2926 | jz .retFFFF |
2928 | jz .retFFFF |
2927 | lodsb |
2929 | lodsb |
2928 | test al, al |
2930 | test al, al |
2929 | jnz ansi2uni_char |
2931 | jnz ansi2uni_char |
2930 | xor eax, eax |
2932 | xor eax, eax |
2931 | xor esi, esi |
2933 | xor esi, esi |
2932 | .retFFFF: |
2934 | .retFFFF: |
2933 | ret |
2935 | ret |
2934 | 2936 | ||
2935 | fat_read_symbols: |
2937 | fat_read_symbols: |
2936 | call fat_read_symbol |
2938 | call fat_read_symbol |
2937 | stosw |
2939 | stosw |
2938 | loop fat_read_symbols |
2940 | loop fat_read_symbols |
2939 | ret |
2941 | ret |
2940 | 2942 | ||
2941 | 2943 | ||
2942 | fat_Write.access_denied: |
2944 | fat_Write.access_denied: |
2943 | push ERROR_ACCESS_DENIED |
2945 | push ERROR_ACCESS_DENIED |
2944 | fat_Write.ret0: |
2946 | fat_Write.ret0: |
2945 | pop eax |
2947 | pop eax |
2946 | xor ebx, ebx |
2948 | xor ebx, ebx |
2947 | ret |
2949 | ret |
2948 | 2950 | ||
2949 | fat_Write.ret11: |
2951 | fat_Write.ret11: |
2950 | push ERROR_DEVICE |
2952 | push ERROR_DEVICE |
2951 | jmp fat_Write.ret0 |
2953 | jmp fat_Write.ret0 |
2952 | 2954 | ||
2953 | ;---------------------------------------------------------------- |
2955 | ;---------------------------------------------------------------- |
2954 | ; fat_Write - FAT implementation of writing to file |
2956 | ; fat_Write - FAT implementation of writing to file |
2955 | ; in: ebp = pointer to FAT structure |
2957 | ; in: ebp = pointer to FAT structure |
2956 | ; in: esi+[esp+4] = name |
2958 | ; in: esi+[esp+4] = name |
2957 | ; in: ebx = pointer to parameters from sysfunc 70 |
2959 | ; in: ebx = pointer to parameters from sysfunc 70 |
2958 | ; out: eax, ebx = return values for sysfunc 70 |
2960 | ; out: eax, ebx = return values for sysfunc 70 |
2959 | ;---------------------------------------------------------------- |
2961 | ;---------------------------------------------------------------- |
2960 | fat_Write: |
2962 | fat_Write: |
2961 | cmp byte [esi], 0 |
2963 | cmp byte [esi], 0 |
2962 | jz .access_denied |
2964 | jz .access_denied |
2963 | call fat_lock |
2965 | call fat_lock |
2964 | push edi |
2966 | push edi |
2965 | stdcall hd_find_lfn, [esp+4+4] |
2967 | stdcall hd_find_lfn, [esp+4+4] |
2966 | jnc .found |
2968 | jnc .found |
2967 | pop edi |
2969 | pop edi |
2968 | push eax |
2970 | push eax |
2969 | call fat_unlock |
2971 | call fat_unlock |
2970 | jmp .ret0 |
2972 | jmp .ret0 |
2971 | .found: |
2973 | .found: |
2972 | ; FAT does not support files larger than 4GB |
2974 | ; FAT does not support files larger than 4GB |
2973 | cmp dword [ebx+8], 0 |
2975 | cmp dword [ebx+8], 0 |
2974 | jz @f |
2976 | jz @f |
2975 | .eof: |
2977 | .eof: |
2976 | pop edi |
2978 | pop edi |
2977 | push ERROR_END_OF_FILE |
2979 | push ERROR_END_OF_FILE |
2978 | call fat_unlock |
2980 | call fat_unlock |
2979 | jmp .ret0 |
2981 | jmp .ret0 |
2980 | @@: |
2982 | @@: |
2981 | mov ecx, [ebx+12] |
2983 | mov ecx, [ebx+12] |
2982 | mov edx, [ebx+16] |
2984 | mov edx, [ebx+16] |
2983 | mov ebx, [ebx+4] |
2985 | mov ebx, [ebx+4] |
2984 | ; now edi points to direntry, ebx=start byte to write, |
2986 | ; now edi points to direntry, ebx=start byte to write, |
2985 | ; ecx=number of bytes to write, edx=data pointer |
2987 | ; ecx=number of bytes to write, edx=data pointer |
2986 | 2988 | ||
2987 | ; extend file if needed |
2989 | ; extend file if needed |
2988 | add ecx, ebx |
2990 | add ecx, ebx |
2989 | jc .eof ; FAT does not support files larger than 4GB |
2991 | jc .eof ; FAT does not support files larger than 4GB |
2990 | push edx |
2992 | push edx |
2991 | push eax ; save directory sector |
2993 | push eax ; save directory sector |
2992 | push 0 ; return value=0 |
2994 | push 0 ; return value=0 |
2993 | 2995 | ||
2994 | call get_time_for_file |
2996 | call get_time_for_file |
2995 | mov [edi+22], ax ; last write time |
2997 | mov [edi+22], ax ; last write time |
2996 | call get_date_for_file |
2998 | call get_date_for_file |
2997 | mov [edi+24], ax ; last write date |
2999 | mov [edi+24], ax ; last write date |
2998 | mov [edi+18], ax ; last access date |
3000 | mov [edi+18], ax ; last access date |
2999 | 3001 | ||
3000 | push dword [edi+28] ; save current file size |
3002 | push dword [edi+28] ; save current file size |
3001 | cmp ecx, [edi+28] |
3003 | cmp ecx, [edi+28] |
3002 | jbe .length_ok |
3004 | jbe .length_ok |
3003 | cmp ecx, ebx |
3005 | cmp ecx, ebx |
3004 | jz .length_ok |
3006 | jz .length_ok |
3005 | call hd_extend_file |
3007 | call hd_extend_file |
3006 | jnc .length_ok |
3008 | jnc .length_ok |
3007 | mov [esp+4], eax |
3009 | mov [esp+4], eax |
3008 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
3010 | ; hd_extend_file can return three error codes: FAT table error, device error or disk full. |
3009 | ; First two cases are fatal errors, in third case we may write some data |
3011 | ; First two cases are fatal errors, in third case we may write some data |
3010 | cmp al, ERROR_DISK_FULL |
3012 | cmp al, ERROR_DISK_FULL |
3011 | jz .disk_full |
3013 | jz .disk_full |
3012 | call fat_unlock |
3014 | call fat_unlock |
3013 | pop eax |
3015 | pop eax |
3014 | pop eax |
3016 | pop eax |
3015 | pop ecx |
3017 | pop ecx |
3016 | pop edx |
3018 | pop edx |
3017 | pop edi |
3019 | pop edi |
3018 | xor ebx, ebx |
3020 | xor ebx, ebx |
3019 | ret |
3021 | ret |
3020 | .disk_full: |
3022 | .disk_full: |
3021 | ; correct number of bytes to write |
3023 | ; correct number of bytes to write |
3022 | mov ecx, [edi+28] |
3024 | mov ecx, [edi+28] |
3023 | cmp ecx, ebx |
3025 | cmp ecx, ebx |
3024 | ja .length_ok |
3026 | ja .length_ok |
3025 | push 0 |
3027 | push 0 |
3026 | .ret: |
3028 | .ret: |
3027 | pop eax |
3029 | pop eax |
3028 | sub edx, [esp+12] |
3030 | sub edx, [esp+12] |
3029 | mov ebx, edx ; ebx=number of written bytes |
3031 | mov ebx, edx ; ebx=number of written bytes |
3030 | call update_disk |
3032 | call update_disk |
3031 | test eax, eax |
3033 | test eax, eax |
3032 | jz @f |
3034 | jz @f |
3033 | mov byte [esp+4], ERROR_DEVICE |
3035 | mov byte [esp+4], ERROR_DEVICE |
3034 | @@: |
3036 | @@: |
3035 | call fat_unlock |
3037 | call fat_unlock |
3036 | pop eax |
3038 | pop eax |
3037 | pop eax |
3039 | pop eax |
3038 | pop ecx |
3040 | pop ecx |
3039 | pop edx |
3041 | pop edx |
3040 | pop edi |
3042 | pop edi |
3041 | ret |
3043 | ret |
3042 | .length_ok: |
3044 | .length_ok: |
3043 | mov esi, [edi+28] |
3045 | mov esi, [edi+28] |
3044 | mov eax, [edi+20-2] |
3046 | mov eax, [edi+20-2] |
3045 | mov ax, [edi+26] |
3047 | mov ax, [edi+26] |
3046 | mov edi, eax ; edi=current cluster |
3048 | mov edi, eax ; edi=current cluster |
3047 | push 0 ; current sector in cluster |
3049 | push 0 ; current sector in cluster |
3048 | ; save directory |
3050 | ; save directory |
3049 | mov eax, [esp+12] |
3051 | mov eax, [esp+12] |
3050 | push ebx |
3052 | push ebx |
3051 | lea ebx, [ebp+FAT.buffer] |
3053 | lea ebx, [ebp+FAT.buffer] |
3052 | call fs_write32_sys |
3054 | call fs_write32_sys |
3053 | pop ebx |
3055 | pop ebx |
3054 | test eax, eax |
3056 | test eax, eax |
3055 | jz @f |
3057 | jz @f |
3056 | .device_err: |
3058 | .device_err: |
3057 | mov byte [esp+8], ERROR_DEVICE |
3059 | mov byte [esp+8], ERROR_DEVICE |
3058 | jmp .ret |
3060 | jmp .ret |
3059 | .fat_err: |
3061 | .fat_err: |
3060 | mov byte [esp+8], ERROR_FAT_TABLE |
3062 | mov byte [esp+8], ERROR_FAT_TABLE |
3061 | jmp .ret |
3063 | jmp .ret |
3062 | @@: |
3064 | @@: |
3063 | 3065 | ||
3064 | ; now ebx=start pos, ecx=end pos, both lie inside file |
3066 | ; now ebx=start pos, ecx=end pos, both lie inside file |
3065 | sub ecx, ebx |
3067 | sub ecx, ebx |
3066 | jz .ret |
3068 | jz .ret |
3067 | .write_loop: |
3069 | .write_loop: |
3068 | ; skip unmodified sectors |
3070 | ; skip unmodified sectors |
3069 | cmp dword [esp+4], 0x200 |
3071 | cmp dword [esp+4], 0x200 |
3070 | jb .modify |
3072 | jb .modify |
3071 | sub ebx, 0x200 |
3073 | sub ebx, 0x200 |
3072 | jae .skip |
3074 | jae .skip |
3073 | add ebx, 0x200 |
3075 | add ebx, 0x200 |
3074 | .modify: |
3076 | .modify: |
3075 | ; get length of data in current sector |
3077 | ; get length of data in current sector |
3076 | push ecx |
3078 | push ecx |
3077 | sub ebx, 0x200 |
3079 | sub ebx, 0x200 |
3078 | jb .hasdata |
3080 | jb .hasdata |
3079 | neg ebx |
3081 | neg ebx |
3080 | xor ecx, ecx |
3082 | xor ecx, ecx |
3081 | jmp @f |
3083 | jmp @f |
3082 | .hasdata: |
3084 | .hasdata: |
3083 | neg ebx |
3085 | neg ebx |
3084 | cmp ecx, ebx |
3086 | cmp ecx, ebx |
3085 | jbe @f |
3087 | jbe @f |
3086 | mov ecx, ebx |
3088 | mov ecx, ebx |
3087 | @@: |
3089 | @@: |
3088 | ; get current sector number |
3090 | ; get current sector number |
3089 | mov eax, edi |
3091 | mov eax, edi |
3090 | dec eax |
3092 | dec eax |
3091 | dec eax |
3093 | dec eax |
3092 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3094 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3093 | add eax, [ebp+FAT.DATA_START] |
3095 | add eax, [ebp+FAT.DATA_START] |
3094 | add eax, [esp+4] |
3096 | add eax, [esp+4] |
3095 | ; load sector if needed |
3097 | ; load sector if needed |
3096 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
3098 | cmp dword [esp+8], 0 ; we don't need to read uninitialized data |
3097 | jz .noread |
3099 | jz .noread |
3098 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
3100 | cmp ecx, 0x200 ; we don't need to read sector if it is fully rewritten |
3099 | jz .noread |
3101 | jz .noread |
3100 | cmp ecx, esi ; (same for the last sector) |
3102 | cmp ecx, esi ; (same for the last sector) |
3101 | jz .noread |
3103 | jz .noread |
3102 | push eax ebx |
3104 | push eax ebx |
3103 | lea ebx, [ebp+FAT.buffer] |
3105 | lea ebx, [ebp+FAT.buffer] |
3104 | call fs_read32_app |
3106 | call fs_read32_app |
3105 | test eax, eax |
3107 | test eax, eax |
3106 | pop ebx eax |
3108 | pop ebx eax |
3107 | jz @f |
3109 | jz @f |
3108 | .device_err2: |
3110 | .device_err2: |
3109 | pop ecx |
3111 | pop ecx |
3110 | jmp .device_err |
3112 | jmp .device_err |
3111 | @@: |
3113 | @@: |
3112 | .noread: |
3114 | .noread: |
3113 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
3115 | ; zero uninitialized data if file was extended (because hd_extend_file does not this) |
3114 | push eax ecx edi |
3116 | push eax ecx edi |
3115 | xor eax, eax |
3117 | xor eax, eax |
3116 | mov ecx, 0x200 |
3118 | mov ecx, 0x200 |
3117 | sub ecx, [esp+8+12] |
3119 | sub ecx, [esp+8+12] |
3118 | jbe @f |
3120 | jbe @f |
3119 | lea edi, [ebp+FAT.buffer] |
3121 | lea edi, [ebp+FAT.buffer] |
3120 | add edi, [esp+8+12] |
3122 | add edi, [esp+8+12] |
3121 | rep stosb |
3123 | rep stosb |
3122 | @@: |
3124 | @@: |
3123 | ; zero uninitialized data in the last sector |
3125 | ; zero uninitialized data in the last sector |
3124 | mov ecx, 0x200 |
3126 | mov ecx, 0x200 |
3125 | sub ecx, esi |
3127 | sub ecx, esi |
3126 | jbe @f |
3128 | jbe @f |
3127 | lea edi, [ebp+FAT.buffer+esi] |
3129 | lea edi, [ebp+FAT.buffer+esi] |
3128 | rep stosb |
3130 | rep stosb |
3129 | @@: |
3131 | @@: |
3130 | pop edi ecx |
3132 | pop edi ecx |
3131 | ; copy new data |
3133 | ; copy new data |
3132 | mov eax, edx |
3134 | mov eax, edx |
3133 | neg ebx |
3135 | neg ebx |
3134 | jecxz @f |
3136 | jecxz @f |
3135 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
3137 | lea ebx, [ebp+FAT.buffer+0x200+ebx] |
3136 | call memmove |
3138 | call memmove |
3137 | xor ebx, ebx |
3139 | xor ebx, ebx |
3138 | @@: |
3140 | @@: |
3139 | pop eax |
3141 | pop eax |
3140 | ; save sector |
3142 | ; save sector |
3141 | push ebx |
3143 | push ebx |
3142 | lea ebx, [ebp+FAT.buffer] |
3144 | lea ebx, [ebp+FAT.buffer] |
3143 | call fs_write32_app |
3145 | call fs_write32_app |
3144 | pop ebx |
3146 | pop ebx |
3145 | test eax, eax |
3147 | test eax, eax |
3146 | jnz .device_err2 |
3148 | jnz .device_err2 |
3147 | add edx, ecx |
3149 | add edx, ecx |
3148 | sub [esp], ecx |
3150 | sub [esp], ecx |
3149 | pop ecx |
3151 | pop ecx |
3150 | jz .ret |
3152 | jz .ret |
3151 | .skip: |
3153 | .skip: |
3152 | ; next sector |
3154 | ; next sector |
3153 | pop eax |
3155 | pop eax |
3154 | inc eax |
3156 | inc eax |
3155 | push eax |
3157 | push eax |
3156 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3158 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3157 | jb @f |
3159 | jb @f |
3158 | and dword [esp], 0 |
3160 | and dword [esp], 0 |
3159 | mov eax, edi |
3161 | mov eax, edi |
3160 | call get_FAT |
3162 | call get_FAT |
3161 | mov edi, eax |
3163 | mov edi, eax |
3162 | jc .device_err |
3164 | jc .device_err |
3163 | cmp edi, 2 |
3165 | cmp edi, 2 |
3164 | jb .fat_err |
3166 | jb .fat_err |
3165 | cmp edi, [ebp+FAT.fatRESERVED] |
3167 | cmp edi, [ebp+FAT.fatRESERVED] |
3166 | jae .fat_err |
3168 | jae .fat_err |
3167 | @@: |
3169 | @@: |
3168 | sub esi, 0x200 |
3170 | sub esi, 0x200 |
3169 | jae @f |
3171 | jae @f |
3170 | xor esi, esi |
3172 | xor esi, esi |
3171 | @@: |
3173 | @@: |
3172 | sub dword [esp+4], 0x200 |
3174 | sub dword [esp+4], 0x200 |
3173 | jae @f |
3175 | jae @f |
3174 | and dword [esp+4], 0 |
3176 | and dword [esp+4], 0 |
3175 | @@: |
3177 | @@: |
3176 | jmp .write_loop |
3178 | jmp .write_loop |
3177 | 3179 | ||
3178 | hd_extend_file.zero_size: |
3180 | hd_extend_file.zero_size: |
3179 | xor eax, eax |
3181 | xor eax, eax |
3180 | jmp hd_extend_file.start_extend |
3182 | jmp hd_extend_file.start_extend |
3181 | 3183 | ||
3182 | ; extends file on hd to given size (new data area is undefined) |
3184 | ; extends file on hd to given size (new data area is undefined) |
3183 | ; in: edi->direntry, ecx=new size |
3185 | ; in: edi->direntry, ecx=new size |
3184 | ; out: CF=0 => OK, eax=0 |
3186 | ; out: CF=0 => OK, eax=0 |
3185 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or ERROR_DEVICE) |
3187 | ; CF=1 => error, eax=code (ERROR_FAT_TABLE or ERROR_DISK_FULL or ERROR_DEVICE) |
3186 | hd_extend_file: |
3188 | hd_extend_file: |
3187 | push esi |
3189 | push esi |
3188 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
3190 | mov esi, [ebp+FAT.SECTORS_PER_CLUSTER] |
3189 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
3191 | imul esi, [ebp+FAT.BYTES_PER_SECTOR] |
3190 | push ecx |
3192 | push ecx |
3191 | ; find the last cluster of file |
3193 | ; find the last cluster of file |
3192 | mov eax, [edi+20-2] |
3194 | mov eax, [edi+20-2] |
3193 | mov ax, [edi+26] |
3195 | mov ax, [edi+26] |
3194 | mov ecx, [edi+28] |
3196 | mov ecx, [edi+28] |
3195 | jecxz .zero_size |
3197 | jecxz .zero_size |
3196 | .last_loop: |
3198 | .last_loop: |
3197 | sub ecx, esi |
3199 | sub ecx, esi |
3198 | jbe .last_found |
3200 | jbe .last_found |
3199 | call get_FAT |
3201 | call get_FAT |
3200 | jnc @f |
3202 | jnc @f |
3201 | .device_err: |
3203 | .device_err: |
3202 | pop ecx |
3204 | pop ecx |
3203 | .device_err2: |
3205 | .device_err2: |
3204 | pop esi |
3206 | pop esi |
3205 | push ERROR_DEVICE |
3207 | push ERROR_DEVICE |
3206 | .ret_err: |
3208 | .ret_err: |
3207 | pop eax |
3209 | pop eax |
3208 | stc |
3210 | stc |
3209 | ret |
3211 | ret |
3210 | @@: |
3212 | @@: |
3211 | cmp eax, 2 |
3213 | cmp eax, 2 |
3212 | jb .fat_err |
3214 | jb .fat_err |
3213 | cmp eax, [ebp+FAT.fatRESERVED] |
3215 | cmp eax, [ebp+FAT.fatRESERVED] |
3214 | jb .last_loop |
3216 | jb .last_loop |
3215 | .fat_err: |
3217 | .fat_err: |
3216 | pop ecx esi |
3218 | pop ecx esi |
3217 | push ERROR_FAT_TABLE |
3219 | push ERROR_FAT_TABLE |
3218 | jmp .ret_err |
3220 | jmp .ret_err |
3219 | .last_found: |
3221 | .last_found: |
3220 | push eax |
3222 | push eax |
3221 | call get_FAT |
3223 | call get_FAT |
3222 | jnc @f |
3224 | jnc @f |
3223 | pop eax |
3225 | pop eax |
3224 | jmp .device_err |
3226 | jmp .device_err |
3225 | @@: |
3227 | @@: |
3226 | cmp eax, [ebp+FAT.fatRESERVED] |
3228 | cmp eax, [ebp+FAT.fatRESERVED] |
3227 | pop eax |
3229 | pop eax |
3228 | jb .fat_err |
3230 | jb .fat_err |
3229 | ; set length to full number of clusters |
3231 | ; set length to full number of clusters |
3230 | sub [edi+28], ecx |
3232 | sub [edi+28], ecx |
3231 | .start_extend: |
3233 | .start_extend: |
3232 | pop ecx |
3234 | pop ecx |
3233 | ; now do extend |
3235 | ; now do extend |
3234 | push edx |
3236 | push edx |
3235 | mov edx, 2 ; start scan from cluster 2 |
3237 | mov edx, 2 ; start scan from cluster 2 |
3236 | .extend_loop: |
3238 | .extend_loop: |
3237 | cmp [edi+28], ecx |
3239 | cmp [edi+28], ecx |
3238 | jae .extend_done |
3240 | jae .extend_done |
3239 | ; add new cluster |
3241 | ; add new cluster |
3240 | push eax |
3242 | push eax |
3241 | call get_free_FAT |
3243 | call get_free_FAT |
3242 | jc .disk_full |
3244 | jc .disk_full |
3243 | mov edx, [ebp+FAT.fatEND] |
3245 | mov edx, [ebp+FAT.fatEND] |
3244 | call set_FAT |
3246 | call set_FAT |
3245 | mov edx, eax |
3247 | mov edx, eax |
3246 | pop eax |
3248 | pop eax |
3247 | test eax, eax |
3249 | test eax, eax |
3248 | jz .first_cluster |
3250 | jz .first_cluster |
3249 | push edx |
3251 | push edx |
3250 | call set_FAT |
3252 | call set_FAT |
3251 | pop edx |
3253 | pop edx |
3252 | jmp @f |
3254 | jmp @f |
3253 | .first_cluster: |
3255 | .first_cluster: |
3254 | ror edx, 16 |
3256 | ror edx, 16 |
3255 | mov [edi+20], dx |
3257 | mov [edi+20], dx |
3256 | ror edx, 16 |
3258 | ror edx, 16 |
3257 | mov [edi+26], dx |
3259 | mov [edi+26], dx |
3258 | @@: |
3260 | @@: |
3259 | push ecx |
3261 | push ecx |
3260 | mov ecx, -1 |
3262 | mov ecx, -1 |
3261 | call add_disk_free_space |
3263 | call add_disk_free_space |
3262 | pop ecx |
3264 | pop ecx |
3263 | mov eax, edx |
3265 | mov eax, edx |
3264 | add [edi+28], esi |
3266 | add [edi+28], esi |
3265 | jmp .extend_loop |
3267 | jmp .extend_loop |
3266 | .extend_done: |
3268 | .extend_done: |
3267 | mov [edi+28], ecx |
3269 | mov [edi+28], ecx |
3268 | pop edx esi |
3270 | pop edx esi |
3269 | xor eax, eax ; CF=0 |
3271 | xor eax, eax ; CF=0 |
3270 | ret |
3272 | ret |
3271 | .device_err3: |
3273 | .device_err3: |
3272 | pop edx |
3274 | pop edx |
3273 | jmp .device_err2 |
3275 | jmp .device_err2 |
3274 | .disk_full: |
3276 | .disk_full: |
3275 | pop eax edx esi |
3277 | pop eax edx esi |
3276 | movi eax, ERROR_DISK_FULL |
3278 | movi eax, ERROR_DISK_FULL |
3277 | stc |
3279 | stc |
3278 | ret |
3280 | ret |
3279 | 3281 | ||
3280 | fat_update_datetime: |
3282 | fat_update_datetime: |
3281 | call get_time_for_file |
3283 | call get_time_for_file |
3282 | mov [edi+22], ax ; last write time |
3284 | mov [edi+22], ax ; last write time |
3283 | call get_date_for_file |
3285 | call get_date_for_file |
3284 | mov [edi+24], ax ; last write date |
3286 | mov [edi+24], ax ; last write date |
3285 | mov [edi+18], ax ; last access date |
3287 | mov [edi+18], ax ; last access date |
3286 | ret |
3288 | ret |
3287 | 3289 | ||
3288 | 3290 | ||
3289 | ;---------------------------------------------------------------- |
3291 | ;---------------------------------------------------------------- |
3290 | ; fat_SetFileEnd - FAT implementation of setting end-of-file |
3292 | ; fat_SetFileEnd - FAT implementation of setting end-of-file |
3291 | ; in: ebp = pointer to FAT structure |
3293 | ; in: ebp = pointer to FAT structure |
3292 | ; in: esi+[esp+4] = name |
3294 | ; in: esi+[esp+4] = name |
3293 | ; in: ebx = pointer to parameters from sysfunc 70 |
3295 | ; in: ebx = pointer to parameters from sysfunc 70 |
3294 | ; out: eax, ebx = return values for sysfunc 70 |
3296 | ; out: eax, ebx = return values for sysfunc 70 |
3295 | ;---------------------------------------------------------------- |
3297 | ;---------------------------------------------------------------- |
3296 | fat_SetFileEnd: |
3298 | fat_SetFileEnd: |
3297 | call fat_lock |
3299 | call fat_lock |
3298 | push edi |
3300 | push edi |
3299 | cmp byte [esi], 0 |
3301 | cmp byte [esi], 0 |
3300 | jnz @f |
3302 | jnz @f |
3301 | .access_denied: |
3303 | .access_denied: |
3302 | push ERROR_ACCESS_DENIED |
3304 | push ERROR_ACCESS_DENIED |
3303 | .ret: |
3305 | .ret: |
3304 | call fat_unlock |
3306 | call fat_unlock |
3305 | pop eax |
3307 | pop eax |
3306 | pop edi |
3308 | pop edi |
3307 | ret |
3309 | ret |
3308 | @@: |
3310 | @@: |
3309 | stdcall hd_find_lfn, [esp+4+4] |
3311 | stdcall hd_find_lfn, [esp+4+4] |
3310 | jnc @f |
3312 | jnc @f |
3311 | .reteax: |
3313 | .reteax: |
3312 | push eax |
3314 | push eax |
3313 | jmp .ret |
3315 | jmp .ret |
3314 | @@: |
3316 | @@: |
3315 | ; must not be directory |
3317 | ; must not be directory |
3316 | test byte [edi+11], 10h |
3318 | test byte [edi+11], 10h |
3317 | jnz .access_denied |
3319 | jnz .access_denied |
3318 | ; file size must not exceed 4 Gb |
3320 | ; file size must not exceed 4 Gb |
3319 | cmp dword [ebx+8], 0 |
3321 | cmp dword [ebx+8], 0 |
3320 | jz @f |
3322 | jz @f |
3321 | push ERROR_END_OF_FILE |
3323 | push ERROR_END_OF_FILE |
3322 | jmp .ret |
3324 | jmp .ret |
3323 | @@: |
3325 | @@: |
3324 | push eax ; save directory sector |
3326 | push eax ; save directory sector |
3325 | ; set file modification date/time to current |
3327 | ; set file modification date/time to current |
3326 | call fat_update_datetime |
3328 | call fat_update_datetime |
3327 | mov eax, [ebx+4] |
3329 | mov eax, [ebx+4] |
3328 | cmp eax, [edi+28] |
3330 | cmp eax, [edi+28] |
3329 | jb .truncate |
3331 | jb .truncate |
3330 | ja .expand |
3332 | ja .expand |
3331 | pop eax |
3333 | pop eax |
3332 | lea ebx, [ebp+FAT.buffer] |
3334 | lea ebx, [ebp+FAT.buffer] |
3333 | call fs_write32_sys |
3335 | call fs_write32_sys |
3334 | test eax, eax |
3336 | test eax, eax |
3335 | jz @f |
3337 | jz @f |
3336 | push ERROR_DEVICE |
3338 | push ERROR_DEVICE |
3337 | jmp .ret |
3339 | jmp .ret |
3338 | @@: |
3340 | @@: |
3339 | push 0 |
3341 | push 0 |
3340 | jmp .ret |
3342 | jmp .ret |
3341 | .expand: |
3343 | .expand: |
3342 | push ebx ebp ecx |
3344 | push ebx ebp ecx |
3343 | push dword [edi+28] ; save old size |
3345 | push dword [edi+28] ; save old size |
3344 | mov ecx, eax |
3346 | mov ecx, eax |
3345 | call hd_extend_file |
3347 | call hd_extend_file |
3346 | push eax ; return code |
3348 | push eax ; return code |
3347 | jnc .expand_ok |
3349 | jnc .expand_ok |
3348 | cmp al, ERROR_DISK_FULL |
3350 | cmp al, ERROR_DISK_FULL |
3349 | jz .disk_full |
3351 | jz .disk_full |
3350 | .pop_ret: |
3352 | .pop_ret: |
3351 | call update_disk |
3353 | call update_disk |
3352 | pop eax ecx ecx ebp ebx ecx |
3354 | pop eax ecx ecx ebp ebx ecx |
3353 | jmp .reteax |
3355 | jmp .reteax |
3354 | .expand_ok: |
3356 | .expand_ok: |
3355 | .disk_full: |
3357 | .disk_full: |
3356 | ; save directory |
3358 | ; save directory |
3357 | mov eax, [edi+28] |
3359 | mov eax, [edi+28] |
3358 | xchg eax, [esp+20] |
3360 | xchg eax, [esp+20] |
3359 | lea ebx, [ebp+FAT.buffer] |
3361 | lea ebx, [ebp+FAT.buffer] |
3360 | call fs_write32_sys |
3362 | call fs_write32_sys |
3361 | test eax, eax |
3363 | test eax, eax |
3362 | mov eax, [edi+20-2] |
3364 | mov eax, [edi+20-2] |
3363 | mov ax, [edi+26] |
3365 | mov ax, [edi+26] |
3364 | mov edi, eax |
3366 | mov edi, eax |
3365 | jz @f |
3367 | jz @f |
3366 | .pop_ret11: |
3368 | .pop_ret11: |
3367 | mov byte [esp], ERROR_DEVICE |
3369 | mov byte [esp], ERROR_DEVICE |
3368 | jmp .pop_ret |
3370 | jmp .pop_ret |
3369 | @@: |
3371 | @@: |
3370 | test edi, edi |
3372 | test edi, edi |
3371 | jz .pop_ret |
3373 | jz .pop_ret |
3372 | ; now zero new data |
3374 | ; now zero new data |
3373 | push 0 |
3375 | push 0 |
3374 | ; edi=current cluster, [esp]=sector in cluster |
3376 | ; edi=current cluster, [esp]=sector in cluster |
3375 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
3377 | ; [esp+24]=new size, [esp+8]=old size, [esp+4]=return code |
3376 | .zero_loop: |
3378 | .zero_loop: |
3377 | cmp edi, 2 |
3379 | cmp edi, 2 |
3378 | jb .error_fat |
3380 | jb .error_fat |
3379 | cmp edi, [ebp+FAT.fatRESERVED] |
3381 | cmp edi, [ebp+FAT.fatRESERVED] |
3380 | jae .error_fat |
3382 | jae .error_fat |
3381 | sub dword [esp+8], 0x200 |
3383 | sub dword [esp+8], 0x200 |
3382 | jae .next_cluster |
3384 | jae .next_cluster |
3383 | lea eax, [edi-2] |
3385 | lea eax, [edi-2] |
3384 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3386 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3385 | add eax, [ebp+FAT.DATA_START] |
3387 | add eax, [ebp+FAT.DATA_START] |
3386 | add eax, [esp] |
3388 | add eax, [esp] |
3387 | cmp dword [esp+8], -0x200 |
3389 | cmp dword [esp+8], -0x200 |
3388 | jz .noread |
3390 | jz .noread |
3389 | push eax |
3391 | push eax |
3390 | lea ebx, [ebp+FAT.buffer] |
3392 | lea ebx, [ebp+FAT.buffer] |
3391 | call fs_read32_app |
3393 | call fs_read32_app |
3392 | test eax, eax |
3394 | test eax, eax |
3393 | pop eax |
3395 | pop eax |
3394 | jnz .err_next |
3396 | jnz .err_next |
3395 | .noread: |
3397 | .noread: |
3396 | mov ecx, [esp+8] |
3398 | mov ecx, [esp+8] |
3397 | neg ecx |
3399 | neg ecx |
3398 | push edi |
3400 | push edi |
3399 | lea edi, [ebp+FAT.buffer+0x200] |
3401 | lea edi, [ebp+FAT.buffer+0x200] |
3400 | add edi, [esp+12] |
3402 | add edi, [esp+12] |
3401 | push eax |
3403 | push eax |
3402 | xor eax, eax |
3404 | xor eax, eax |
3403 | mov [esp+16], eax |
3405 | mov [esp+16], eax |
3404 | rep stosb |
3406 | rep stosb |
3405 | pop eax |
3407 | pop eax |
3406 | pop edi |
3408 | pop edi |
3407 | call fs_write32_app |
3409 | call fs_write32_app |
3408 | test eax, eax |
3410 | test eax, eax |
3409 | jz .next_cluster |
3411 | jz .next_cluster |
3410 | .err_next: |
3412 | .err_next: |
3411 | mov byte [esp+4], ERROR_DEVICE |
3413 | mov byte [esp+4], ERROR_DEVICE |
3412 | .next_cluster: |
3414 | .next_cluster: |
3413 | pop eax |
3415 | pop eax |
3414 | sub dword [esp+20], 0x200 |
3416 | sub dword [esp+20], 0x200 |
3415 | jbe .pop_ret |
3417 | jbe .pop_ret |
3416 | inc eax |
3418 | inc eax |
3417 | push eax |
3419 | push eax |
3418 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3420 | cmp eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3419 | jb .zero_loop |
3421 | jb .zero_loop |
3420 | and dword [esp], 0 |
3422 | and dword [esp], 0 |
3421 | mov eax, edi |
3423 | mov eax, edi |
3422 | call get_FAT |
3424 | call get_FAT |
3423 | mov edi, eax |
3425 | mov edi, eax |
3424 | jnc .zero_loop |
3426 | jnc .zero_loop |
3425 | pop eax |
3427 | pop eax |
3426 | jmp .pop_ret11 |
3428 | jmp .pop_ret11 |
3427 | .truncate: |
3429 | .truncate: |
3428 | mov [edi+28], eax |
3430 | mov [edi+28], eax |
3429 | push ecx |
3431 | push ecx |
3430 | mov ecx, [edi+20-2] |
3432 | mov ecx, [edi+20-2] |
3431 | mov cx, [edi+26] |
3433 | mov cx, [edi+26] |
3432 | push eax |
3434 | push eax |
3433 | test eax, eax |
3435 | test eax, eax |
3434 | jz .zero_size |
3436 | jz .zero_size |
3435 | ; find new last cluster |
3437 | ; find new last cluster |
3436 | @@: |
3438 | @@: |
3437 | cmp ecx, 2 |
3439 | cmp ecx, 2 |
3438 | jb .error_fat2 |
3440 | jb .error_fat2 |
3439 | cmp ecx, [ebp+FAT.fatRESERVED] |
3441 | cmp ecx, [ebp+FAT.fatRESERVED] |
3440 | jae .error_fat2 |
3442 | jae .error_fat2 |
3441 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3443 | mov eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3442 | shl eax, 9 |
3444 | shl eax, 9 |
3443 | sub [esp], eax |
3445 | sub [esp], eax |
3444 | jbe @f |
3446 | jbe @f |
3445 | mov eax, ecx |
3447 | mov eax, ecx |
3446 | call get_FAT |
3448 | call get_FAT |
3447 | mov ecx, eax |
3449 | mov ecx, eax |
3448 | jnc @b |
3450 | jnc @b |
3449 | .device_err3: |
3451 | .device_err3: |
3450 | pop eax ecx eax edi |
3452 | pop eax ecx eax edi |
3451 | call update_disk |
3453 | call update_disk |
3452 | call fat_unlock |
3454 | call fat_unlock |
3453 | movi eax, ERROR_DEVICE |
3455 | movi eax, ERROR_DEVICE |
3454 | ret |
3456 | ret |
3455 | @@: |
3457 | @@: |
3456 | ; we will zero data at the end of last sector - remember it |
3458 | ; we will zero data at the end of last sector - remember it |
3457 | push ecx |
3459 | push ecx |
3458 | ; terminate FAT chain |
3460 | ; terminate FAT chain |
3459 | push edx |
3461 | push edx |
3460 | mov eax, ecx |
3462 | mov eax, ecx |
3461 | mov edx, [ebp+FAT.fatEND] |
3463 | mov edx, [ebp+FAT.fatEND] |
3462 | call set_FAT |
3464 | call set_FAT |
3463 | mov eax, edx |
3465 | mov eax, edx |
3464 | pop edx |
3466 | pop edx |
3465 | jnc @f |
3467 | jnc @f |
3466 | .device_err4: |
3468 | .device_err4: |
3467 | pop ecx |
3469 | pop ecx |
3468 | jmp .device_err3 |
3470 | jmp .device_err3 |
3469 | .zero_size: |
3471 | .zero_size: |
3470 | and word [edi+20], 0 |
3472 | and word [edi+20], 0 |
3471 | and word [edi+26], 0 |
3473 | and word [edi+26], 0 |
3472 | push 0 |
3474 | push 0 |
3473 | mov eax, ecx |
3475 | mov eax, ecx |
3474 | @@: |
3476 | @@: |
3475 | ; delete FAT chain |
3477 | ; delete FAT chain |
3476 | call clear_cluster_chain |
3478 | call clear_cluster_chain |
3477 | jc .device_err4 |
3479 | jc .device_err4 |
3478 | ; save directory |
3480 | ; save directory |
3479 | mov eax, [esp+12] |
3481 | mov eax, [esp+12] |
3480 | push ebx |
3482 | push ebx |
3481 | lea ebx, [ebp+FAT.buffer] |
3483 | lea ebx, [ebp+FAT.buffer] |
3482 | call fs_write32_sys |
3484 | call fs_write32_sys |
3483 | pop ebx |
3485 | pop ebx |
3484 | test eax, eax |
3486 | test eax, eax |
3485 | jnz .device_err4 |
3487 | jnz .device_err4 |
3486 | ; zero last sector, ignore errors |
3488 | ; zero last sector, ignore errors |
3487 | pop ecx |
3489 | pop ecx |
3488 | pop eax |
3490 | pop eax |
3489 | dec ecx |
3491 | dec ecx |
3490 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3492 | imul ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3491 | add ecx, [ebp+FAT.DATA_START] |
3493 | add ecx, [ebp+FAT.DATA_START] |
3492 | push eax |
3494 | push eax |
3493 | sar eax, 9 |
3495 | sar eax, 9 |
3494 | add ecx, eax |
3496 | add ecx, eax |
3495 | pop eax |
3497 | pop eax |
3496 | and eax, 0x1FF |
3498 | and eax, 0x1FF |
3497 | jz .truncate_done |
3499 | jz .truncate_done |
3498 | push ebx eax |
3500 | push ebx eax |
3499 | mov eax, ecx |
3501 | mov eax, ecx |
3500 | lea ebx, [ebp+FAT.buffer] |
3502 | lea ebx, [ebp+FAT.buffer] |
3501 | call fs_read32_app |
3503 | call fs_read32_app |
3502 | pop eax |
3504 | pop eax |
3503 | lea edi, [ebp+FAT.buffer+eax] |
3505 | lea edi, [ebp+FAT.buffer+eax] |
3504 | push ecx |
3506 | push ecx |
3505 | mov ecx, 0x200 |
3507 | mov ecx, 0x200 |
3506 | sub ecx, eax |
3508 | sub ecx, eax |
3507 | xor eax, eax |
3509 | xor eax, eax |
3508 | rep stosb |
3510 | rep stosb |
3509 | pop eax |
3511 | pop eax |
3510 | call fs_write32_app |
3512 | call fs_write32_app |
3511 | pop ebx |
3513 | pop ebx |
3512 | .truncate_done: |
3514 | .truncate_done: |
3513 | pop ecx eax edi |
3515 | pop ecx eax edi |
3514 | call update_disk |
3516 | call update_disk |
3515 | call fat_unlock |
3517 | call fat_unlock |
3516 | xor eax, eax |
3518 | xor eax, eax |
3517 | ret |
3519 | ret |
3518 | .error_fat: |
3520 | .error_fat: |
3519 | pop eax |
3521 | pop eax |
3520 | mov byte [esp], ERROR_FAT_TABLE |
3522 | mov byte [esp], ERROR_FAT_TABLE |
3521 | jmp .pop_ret |
3523 | jmp .pop_ret |
3522 | .error_fat2: |
3524 | .error_fat2: |
3523 | pop eax ecx eax edi |
3525 | pop eax ecx eax edi |
3524 | call update_disk |
3526 | call update_disk |
3525 | call fat_unlock |
3527 | call fat_unlock |
3526 | movi eax, ERROR_FAT_TABLE |
3528 | movi eax, ERROR_FAT_TABLE |
3527 | ret |
3529 | ret |
3528 | 3530 | ||
3529 | ;---------------------------------------------------------------- |
3531 | ;---------------------------------------------------------------- |
3530 | ; fat_GetFileInfo - FAT implementation of getting file info |
3532 | ; fat_GetFileInfo - FAT implementation of getting file info |
3531 | ; in: ebp = pointer to FAT structure |
3533 | ; in: ebp = pointer to FAT structure |
3532 | ; in: esi+[esp+4] = name |
3534 | ; in: esi+[esp+4] = name |
3533 | ; in: ebx = pointer to parameters from sysfunc 70 |
3535 | ; in: ebx = pointer to parameters from sysfunc 70 |
3534 | ; out: eax, ebx = return values for sysfunc 70 |
3536 | ; out: eax, ebx = return values for sysfunc 70 |
3535 | ;---------------------------------------------------------------- |
3537 | ;---------------------------------------------------------------- |
3536 | fat_GetFileInfo: |
3538 | fat_GetFileInfo: |
3537 | cmp byte [esi], 0 |
3539 | cmp byte [esi], 0 |
3538 | jnz @f |
3540 | jnz @f |
3539 | mov eax, 2 |
3541 | mov eax, 2 |
3540 | ret |
3542 | ret |
3541 | @@: |
3543 | @@: |
3542 | push edi |
3544 | push edi |
3543 | call fat_lock |
3545 | call fat_lock |
3544 | stdcall hd_find_lfn, [esp+4+4] |
3546 | stdcall hd_find_lfn, [esp+4+4] |
3545 | jc .error |
3547 | jc .error |
3546 | push ebp |
3548 | push ebp |
3547 | xor ebp, ebp |
3549 | xor ebp, ebp |
3548 | mov esi, [ebx+16] |
3550 | mov esi, [ebx+16] |
3549 | mov dword [esi+4], ebp |
3551 | mov dword [esi+4], ebp |
3550 | call fat_entry_to_bdfe2 |
3552 | call fat_entry_to_bdfe2 |
3551 | pop ebp |
3553 | pop ebp |
3552 | call fat_unlock |
3554 | call fat_unlock |
3553 | xor eax, eax |
3555 | xor eax, eax |
3554 | pop edi |
3556 | pop edi |
3555 | ret |
3557 | ret |
3556 | .error: |
3558 | .error: |
3557 | push eax |
3559 | push eax |
3558 | call fat_unlock |
3560 | call fat_unlock |
3559 | pop eax |
3561 | pop eax |
3560 | pop edi |
3562 | pop edi |
3561 | ret |
3563 | ret |
3562 | 3564 | ||
3563 | ;---------------------------------------------------------------- |
3565 | ;---------------------------------------------------------------- |
3564 | ; fat_SetFileInfo - FAT implementation of setting file info |
3566 | ; fat_SetFileInfo - FAT implementation of setting file info |
3565 | ; in: ebp = pointer to FAT structure |
3567 | ; in: ebp = pointer to FAT structure |
3566 | ; in: esi+[esp+4] = name |
3568 | ; in: esi+[esp+4] = name |
3567 | ; in: ebx = pointer to parameters from sysfunc 70 |
3569 | ; in: ebx = pointer to parameters from sysfunc 70 |
3568 | ; out: eax, ebx = return values for sysfunc 70 |
3570 | ; out: eax, ebx = return values for sysfunc 70 |
3569 | ;---------------------------------------------------------------- |
3571 | ;---------------------------------------------------------------- |
3570 | fat_SetFileInfo: |
3572 | fat_SetFileInfo: |
3571 | cmp byte [esi], 0 |
3573 | cmp byte [esi], 0 |
3572 | jnz @f |
3574 | jnz @f |
3573 | mov eax, 2 |
3575 | mov eax, 2 |
3574 | ret |
3576 | ret |
3575 | @@: |
3577 | @@: |
3576 | push edi |
3578 | push edi |
3577 | call fat_lock |
3579 | call fat_lock |
3578 | stdcall hd_find_lfn, [esp+4+4] |
3580 | stdcall hd_find_lfn, [esp+4+4] |
3579 | jc .error |
3581 | jc .error |
3580 | push eax |
3582 | push eax |
3581 | mov edx, [ebx+16] |
3583 | mov edx, [ebx+16] |
3582 | call bdfe_to_fat_entry |
3584 | call bdfe_to_fat_entry |
3583 | pop eax |
3585 | pop eax |
3584 | lea ebx, [ebp+FAT.buffer] |
3586 | lea ebx, [ebp+FAT.buffer] |
3585 | call fs_write32_sys |
3587 | call fs_write32_sys |
3586 | call update_disk |
3588 | call update_disk |
3587 | call fat_unlock |
3589 | call fat_unlock |
3588 | pop edi |
3590 | pop edi |
3589 | xor eax, eax |
3591 | xor eax, eax |
3590 | ret |
3592 | ret |
3591 | .error: |
3593 | .error: |
3592 | push eax |
3594 | push eax |
3593 | call fat_unlock |
3595 | call fat_unlock |
3594 | pop eax |
3596 | pop eax |
3595 | pop edi |
3597 | pop edi |
3596 | ret |
3598 | ret |
3597 | 3599 | ||
3598 | ;---------------------------------------------------------------- |
3600 | ;---------------------------------------------------------------- |
3599 | ; fat_Delete - FAT implementation of deleting a file/folder |
3601 | ; fat_Delete - FAT implementation of deleting a file/folder |
3600 | ; in: ebp = pointer to FAT structure |
3602 | ; in: ebp = pointer to FAT structure |
3601 | ; in: esi+[esp+4] = name |
3603 | ; in: esi+[esp+4] = name |
3602 | ; in: ebx = pointer to parameters from sysfunc 70 |
3604 | ; in: ebx = pointer to parameters from sysfunc 70 |
3603 | ; out: eax, ebx = return values for sysfunc 70 |
3605 | ; out: eax, ebx = return values for sysfunc 70 |
3604 | ;---------------------------------------------------------------- |
3606 | ;---------------------------------------------------------------- |
3605 | fat_Delete: |
3607 | fat_Delete: |
3606 | call fat_lock |
3608 | call fat_lock |
3607 | cmp byte [esi], 0 |
3609 | cmp byte [esi], 0 |
3608 | jnz @f |
3610 | jnz @f |
3609 | ; cannot delete root! |
3611 | ; cannot delete root! |
3610 | .access_denied: |
3612 | .access_denied: |
3611 | push ERROR_ACCESS_DENIED |
3613 | push ERROR_ACCESS_DENIED |
3612 | .pop_ret: |
3614 | .pop_ret: |
3613 | call fat_unlock |
3615 | call fat_unlock |
3614 | pop eax |
3616 | pop eax |
3615 | xor ebx, ebx |
3617 | xor ebx, ebx |
3616 | ret |
3618 | ret |
3617 | @@: |
3619 | @@: |
3618 | and [ebp+FAT.longname_sec1], 0 |
3620 | and [ebp+FAT.longname_sec1], 0 |
3619 | and [ebp+FAT.longname_sec2], 0 |
3621 | and [ebp+FAT.longname_sec2], 0 |
3620 | push edi |
3622 | push edi |
3621 | stdcall hd_find_lfn, [esp+4+4] |
3623 | stdcall hd_find_lfn, [esp+4+4] |
3622 | jnc .found |
3624 | jnc .found |
3623 | pop edi |
3625 | pop edi |
3624 | push ERROR_FILE_NOT_FOUND |
3626 | push ERROR_FILE_NOT_FOUND |
3625 | jmp .pop_ret |
3627 | jmp .pop_ret |
3626 | .found: |
3628 | .found: |
3627 | cmp dword [edi], '. ' |
3629 | cmp dword [edi], '. ' |
3628 | jz .access_denied2 |
3630 | jz .access_denied2 |
3629 | cmp dword [edi], '.. ' |
3631 | cmp dword [edi], '.. ' |
3630 | jz .access_denied2 |
3632 | jz .access_denied2 |
3631 | test byte [edi+11], 10h |
3633 | test byte [edi+11], 10h |
3632 | jz .dodel |
3634 | jz .dodel |
3633 | ; we can delete only empty folders! |
3635 | ; we can delete only empty folders! |
3634 | pushad |
3636 | pushad |
3635 | mov esi, [edi+20-2] |
3637 | mov esi, [edi+20-2] |
3636 | mov si, [edi+26] |
3638 | mov si, [edi+26] |
3637 | xor ecx, ecx |
3639 | xor ecx, ecx |
3638 | lea eax, [esi-2] |
3640 | lea eax, [esi-2] |
3639 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3641 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3640 | add eax, [ebp+FAT.DATA_START] |
3642 | add eax, [ebp+FAT.DATA_START] |
3641 | lea ebx, [ebp+FAT.buffer] |
3643 | lea ebx, [ebp+FAT.buffer] |
3642 | call fs_read32_sys |
3644 | call fs_read32_sys |
3643 | test eax, eax |
3645 | test eax, eax |
3644 | jnz .err1 |
3646 | jnz .err1 |
3645 | lea eax, [ebx+0x200] |
3647 | lea eax, [ebx+0x200] |
3646 | add ebx, 2*0x20 |
3648 | add ebx, 2*0x20 |
3647 | .checkempty: |
3649 | .checkempty: |
3648 | cmp byte [ebx], 0 |
3650 | cmp byte [ebx], 0 |
3649 | jz .empty |
3651 | jz .empty |
3650 | cmp byte [ebx], 0xE5 |
3652 | cmp byte [ebx], 0xE5 |
3651 | jnz .notempty |
3653 | jnz .notempty |
3652 | add ebx, 0x20 |
3654 | add ebx, 0x20 |
3653 | cmp ebx, eax |
3655 | cmp ebx, eax |
3654 | jb .checkempty |
3656 | jb .checkempty |
3655 | inc ecx |
3657 | inc ecx |
3656 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3658 | cmp ecx, [ebp+FAT.SECTORS_PER_CLUSTER] |
3657 | jb @f |
3659 | jb @f |
3658 | mov eax, esi |
3660 | mov eax, esi |
3659 | call get_FAT |
3661 | call get_FAT |
3660 | jc .err1 |
3662 | jc .err1 |
3661 | cmp eax, 2 |
3663 | cmp eax, 2 |
3662 | jb .error_fat |
3664 | jb .error_fat |
3663 | cmp eax, [ebp+FAT.fatRESERVED] |
3665 | cmp eax, [ebp+FAT.fatRESERVED] |
3664 | jae .empty |
3666 | jae .empty |
3665 | mov esi, eax |
3667 | mov esi, eax |
3666 | xor ecx, ecx |
3668 | xor ecx, ecx |
3667 | @@: |
3669 | @@: |
3668 | lea eax, [esi-2] |
3670 | lea eax, [esi-2] |
3669 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3671 | imul eax, [ebp+FAT.SECTORS_PER_CLUSTER] |
3670 | add eax, [ebp+FAT.DATA_START] |
3672 | add eax, [ebp+FAT.DATA_START] |
3671 | add eax, ecx |
3673 | add eax, ecx |
3672 | lea ebx, [ebp+FAT.buffer] |
3674 | lea ebx, [ebp+FAT.buffer] |
3673 | call fs_read32_sys |
3675 | call fs_read32_sys |
3674 | test eax, eax |
3676 | test eax, eax |
3675 | lea eax, [ebx+0x200] |
3677 | lea eax, [ebx+0x200] |
3676 | jz .checkempty |
3678 | jz .checkempty |
3677 | .err1: |
3679 | .err1: |
3678 | popad |
3680 | popad |
3679 | .err2: |
3681 | .err2: |
3680 | pop edi |
3682 | pop edi |
3681 | call fat_unlock |
3683 | call fat_unlock |
3682 | movi eax, ERROR_DEVICE |
3684 | movi eax, ERROR_DEVICE |
3683 | ret |
3685 | ret |
3684 | .error_fat: |
3686 | .error_fat: |
3685 | popad |
3687 | popad |
3686 | pop edi |
3688 | pop edi |
3687 | call fat_unlock |
3689 | call fat_unlock |
3688 | movi eax, ERROR_FAT_TABLE |
3690 | movi eax, ERROR_FAT_TABLE |
3689 | ret |
3691 | ret |
3690 | .notempty: |
3692 | .notempty: |
3691 | popad |
3693 | popad |
3692 | .access_denied2: |
3694 | .access_denied2: |
3693 | pop edi |
3695 | pop edi |
3694 | call fat_unlock |
3696 | call fat_unlock |
3695 | movi eax, ERROR_ACCESS_DENIED |
3697 | movi eax, ERROR_ACCESS_DENIED |
3696 | ret |
3698 | ret |
3697 | .empty: |
3699 | .empty: |
3698 | popad |
3700 | popad |
3699 | push eax ebx |
3701 | push eax ebx |
3700 | lea ebx, [ebp+FAT.buffer] |
3702 | lea ebx, [ebp+FAT.buffer] |
3701 | call fs_read32_sys |
3703 | call fs_read32_sys |
3702 | test eax, eax |
3704 | test eax, eax |
3703 | pop ebx eax |
3705 | pop ebx eax |
3704 | jnz .err2 |
3706 | jnz .err2 |
3705 | .dodel: |
3707 | .dodel: |
3706 | push eax |
3708 | push eax |
3707 | mov eax, [edi+20-2] |
3709 | mov eax, [edi+20-2] |
3708 | mov ax, [edi+26] |
3710 | mov ax, [edi+26] |
3709 | xchg eax, [esp] |
3711 | xchg eax, [esp] |
3710 | ; delete folder entry |
3712 | ; delete folder entry |
3711 | mov byte [edi], 0xE5 |
3713 | mov byte [edi], 0xE5 |
3712 | ; delete LFN (if present) |
3714 | ; delete LFN (if present) |
3713 | .lfndel: |
3715 | .lfndel: |
3714 | lea edx, [ebp+FAT.buffer] |
3716 | lea edx, [ebp+FAT.buffer] |
3715 | cmp edi, edx |
3717 | cmp edi, edx |
3716 | ja @f |
3718 | ja @f |
3717 | cmp [ebp+FAT.longname_sec2], 0 |
3719 | cmp [ebp+FAT.longname_sec2], 0 |
3718 | jz .lfndone |
3720 | jz .lfndone |
3719 | push [ebp+FAT.longname_sec2] |
3721 | push [ebp+FAT.longname_sec2] |
3720 | push [ebp+FAT.longname_sec1] |
3722 | push [ebp+FAT.longname_sec1] |
3721 | pop [ebp+FAT.longname_sec2] |
3723 | pop [ebp+FAT.longname_sec2] |
3722 | and [ebp+FAT.longname_sec1], 0 |
3724 | and [ebp+FAT.longname_sec1], 0 |
3723 | push ebx |
3725 | push ebx |
3724 | mov ebx, edx |
3726 | mov ebx, edx |
3725 | call fs_write32_sys |
3727 | call fs_write32_sys |
3726 | mov eax, [esp+4] |
3728 | mov eax, [esp+4] |
3727 | call fs_read32_sys |
3729 | call fs_read32_sys |
3728 | pop ebx |
3730 | pop ebx |
3729 | pop eax |
3731 | pop eax |
3730 | lea edi, [ebp+FAT.buffer+0x200] |
3732 | lea edi, [ebp+FAT.buffer+0x200] |
3731 | @@: |
3733 | @@: |
3732 | sub edi, 0x20 |
3734 | sub edi, 0x20 |
3733 | cmp byte [edi], 0xE5 |
3735 | cmp byte [edi], 0xE5 |
3734 | jz .lfndone |
3736 | jz .lfndone |
3735 | cmp byte [edi+11], 0xF |
3737 | cmp byte [edi+11], 0xF |
3736 | jnz .lfndone |
3738 | jnz .lfndone |
3737 | mov byte [edi], 0xE5 |
3739 | mov byte [edi], 0xE5 |
3738 | jmp .lfndel |
3740 | jmp .lfndel |
3739 | .lfndone: |
3741 | .lfndone: |
3740 | push ebx |
3742 | push ebx |
3741 | lea ebx, [ebp+FAT.buffer] |
3743 | lea ebx, [ebp+FAT.buffer] |
3742 | call fs_write32_sys |
3744 | call fs_write32_sys |
3743 | pop ebx |
3745 | pop ebx |
3744 | ; delete FAT chain |
3746 | ; delete FAT chain |
3745 | pop eax |
3747 | pop eax |
3746 | call clear_cluster_chain |
3748 | call clear_cluster_chain |
3747 | call update_disk |
3749 | call update_disk |
3748 | call fat_unlock |
3750 | call fat_unlock |
3749 | pop edi |
3751 | pop edi |
3750 | xor eax, eax |
3752 | xor eax, eax |
3751 | ret |
3753 | ret |
3752 | 3754 | ||
3753 | ; \end{diamond}=>=>=>=>=>=>>65536 |
3755 | ; \end{diamond}=>=>=>=>=>=>>65536 |
3754 | >65536 |
3756 | >65536 |
3755 | >> |
3757 | >> |