Rev 1689 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
||
1289 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2009. All rights reserved. ;; |
431 | serge | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
||
6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
164 | serge | 7 | |
593 | mikedld | 8 | $Revision: 1710 $ |
9 | |||
10 | |||
164 | serge | 11 | struc MEM_BLOCK |
12 | { .next_block dd ? |
||
13 | .prev_block dd ? ;+4 |
||
357 | serge | 14 | .list_fd dd ? ;+8 |
15 | .list_bk dd ? ;+12 |
||
164 | serge | 16 | .base dd ? ;+16 |
17 | .size dd ? ;+20 |
||
18 | .flags dd ? ;+24 |
||
19 | .handle dd ? ;+28 |
||
20 | } |
||
21 | |||
357 | serge | 22 | MEM_LIST_OFFSET equ 8 |
164 | serge | 23 | FREE_BLOCK equ 4 |
24 | USED_BLOCK equ 8 |
||
546 | diamond | 25 | DONT_FREE_BLOCK equ 10h |
164 | serge | 26 | |
27 | virtual at 0 |
||
28 | MEM_BLOCK MEM_BLOCK |
||
29 | end virtual |
||
30 | |||
31 | MEM_BLOCK_SIZE equ 8*4 |
||
32 | |||
33 | block_next equ MEM_BLOCK.next_block |
||
34 | block_prev equ MEM_BLOCK.prev_block |
||
357 | serge | 35 | list_fd equ MEM_BLOCK.list_fd |
36 | list_bk equ MEM_BLOCK.list_bk |
||
164 | serge | 37 | block_base equ MEM_BLOCK.base |
38 | block_size equ MEM_BLOCK.size |
||
39 | block_flags equ MEM_BLOCK.flags |
||
40 | |||
41 | macro calc_index op |
||
42 | { shr op, 12 |
||
43 | dec op |
||
44 | cmp op, 63 |
||
45 | jna @f |
||
46 | mov op, 63 |
||
47 | @@: |
||
48 | } |
||
49 | |||
50 | macro remove_from_list op |
||
357 | serge | 51 | { mov edx, [op+list_fd] |
52 | mov ecx, [op+list_bk] |
||
164 | serge | 53 | test edx, edx |
54 | jz @f |
||
357 | serge | 55 | mov [edx+list_bk], ecx |
164 | serge | 56 | @@: |
57 | test ecx, ecx |
||
58 | jz @f |
||
357 | serge | 59 | mov [ecx+list_fd], edx |
164 | serge | 60 | @@: |
357 | serge | 61 | mov [op+list_fd],0 |
62 | mov [op+list_bk],0 |
||
164 | serge | 63 | } |
64 | |||
65 | macro remove_from_free op |
||
66 | { |
||
67 | remove_from_list op |
||
68 | |||
69 | mov eax, [op+block_size] |
||
70 | calc_index eax |
||
71 | cmp [mem_block_list+eax*4], op |
||
72 | jne @f |
||
73 | mov [mem_block_list+eax*4], edx |
||
74 | @@: |
||
75 | cmp [mem_block_list+eax*4], 0 |
||
76 | jne @f |
||
77 | btr [mem_block_mask], eax |
||
78 | @@: |
||
79 | } |
||
80 | |||
81 | macro remove_from_used op |
||
82 | { |
||
357 | serge | 83 | mov edx, [op+list_fd] |
84 | mov ecx, [op+list_bk] |
||
85 | mov [edx+list_bk], ecx |
||
86 | mov [ecx+list_fd], edx |
||
87 | mov [op+list_fd], 0 |
||
88 | mov [op+list_bk], 0 |
||
164 | serge | 89 | } |
90 | |||
91 | align 4 |
||
92 | proc init_kernel_heap |
||
93 | |||
1130 | diamond | 94 | mov ecx, 64 |
164 | serge | 95 | mov edi, mem_block_list |
96 | xor eax, eax |
||
97 | cld |
||
98 | rep stosd |
||
99 | |||
100 | mov ecx, 512/4 |
||
101 | mov edi, mem_block_map |
||
102 | not eax |
||
103 | rep stosd |
||
104 | |||
105 | mov [mem_block_start], mem_block_map |
||
106 | mov [mem_block_end], mem_block_map+512 |
||
107 | mov [mem_block_arr], HEAP_BASE |
||
108 | |||
357 | serge | 109 | mov eax, mem_used.fd-MEM_LIST_OFFSET |
110 | mov [mem_used.fd], eax |
||
111 | mov [mem_used.bk], eax |
||
112 | |||
1710 | art_zh | 113 | mov [KERNEL_ALLOC_FLAG], dword PG_SW |
164 | serge | 114 | stdcall alloc_pages, dword 32 |
115 | mov ecx, 32 |
||
116 | mov edx, eax |
||
117 | mov edi, HEAP_BASE |
||
118 | .l1: |
||
119 | stdcall map_page,edi,edx,PG_SW |
||
120 | add edi, 0x1000 |
||
121 | add edx, 0x1000 |
||
122 | dec ecx |
||
123 | jnz .l1 |
||
124 | |||
125 | mov edi, HEAP_BASE |
||
357 | serge | 126 | mov ebx, HEAP_BASE+MEM_BLOCK_SIZE |
164 | serge | 127 | xor eax, eax |
128 | mov [edi+block_next], ebx |
||
129 | mov [edi+block_prev], eax |
||
357 | serge | 130 | mov [edi+list_fd], eax |
131 | mov [edi+list_bk], eax |
||
164 | serge | 132 | mov [edi+block_base], HEAP_BASE |
133 | mov [edi+block_size], 4096*MEM_BLOCK_SIZE |
||
134 | mov [edi+block_flags], USED_BLOCK |
||
135 | |||
136 | mov [ebx+block_next], eax |
||
137 | mov [ebx+block_prev], eax |
||
357 | serge | 138 | mov [ebx+list_fd], eax |
139 | mov [ebx+list_bk], eax |
||
164 | serge | 140 | mov [ebx+block_base], HEAP_BASE+4096*MEM_BLOCK_SIZE |
141 | |||
1090 | diamond | 142 | mov ecx, [pg_data.kernel_pages] |
143 | shl ecx, 12 |
||
1332 | diamond | 144 | sub ecx, HEAP_BASE-OS_BASE+4096*MEM_BLOCK_SIZE |
170 | serge | 145 | mov [heap_size], ecx |
146 | mov [heap_free], ecx |
||
164 | serge | 147 | mov [ebx+block_size], ecx |
148 | mov [ebx+block_flags], FREE_BLOCK |
||
149 | |||
150 | mov [mem_block_mask], eax |
||
151 | mov [mem_block_mask+4],0x80000000 |
||
152 | |||
153 | mov [mem_block_list+63*4], ebx |
||
154 | mov byte [mem_block_map], 0xFC |
||
279 | serge | 155 | and [heap_mutex], 0 |
170 | serge | 156 | mov [heap_blocks], 4095 |
1130 | diamond | 157 | mov [free_blocks], 4094 |
164 | serge | 158 | ret |
159 | endp |
||
160 | |||
369 | serge | 161 | ; param |
162 | ; eax= required size |
||
163 | ; |
||
164 | ; retval |
||
165 | ; edi= memory block descriptor |
||
166 | ; ebx= descriptor index |
||
167 | |||
164 | serge | 168 | align 4 |
819 | serge | 169 | get_small_block: |
164 | serge | 170 | mov ecx, eax |
369 | serge | 171 | shr ecx, 12 |
172 | dec ecx |
||
173 | cmp ecx, 63 |
||
174 | jle .get_index |
||
175 | mov ecx, 63 |
||
176 | .get_index: |
||
177 | lea esi, [mem_block_mask] |
||
164 | serge | 178 | xor ebx, ebx |
369 | serge | 179 | or edx, -1 |
164 | serge | 180 | |
181 | cmp ecx, 32 |
||
182 | jb .bit_test |
||
183 | |||
184 | sub ecx, 32 |
||
185 | add ebx, 32 |
||
186 | add esi, 4 |
||
187 | .bit_test: |
||
188 | shl edx, cl |
||
369 | serge | 189 | and edx, [esi] |
190 | .find: |
||
191 | bsf edi, edx |
||
164 | serge | 192 | jz .high_mask |
369 | serge | 193 | add ebx, edi |
194 | mov edi, [mem_block_list+ebx*4] |
||
195 | .check_size: |
||
196 | cmp eax, [edi+block_size] |
||
197 | ja .next |
||
164 | serge | 198 | ret |
199 | |||
200 | .high_mask: |
||
201 | add esi, 4 |
||
369 | serge | 202 | cmp esi, mem_block_mask+8 |
203 | jae .err |
||
164 | serge | 204 | add ebx, 32 |
369 | serge | 205 | mov edx, [esi] |
206 | jmp .find |
||
207 | .next: |
||
208 | mov edi, [edi+list_fd] |
||
209 | test edi, edi |
||
210 | jnz .check_size |
||
211 | .err: |
||
212 | xor edi, edi |
||
164 | serge | 213 | ret |
214 | |||
215 | align 4 |
||
819 | serge | 216 | alloc_mem_block: |
164 | serge | 217 | |
218 | mov ebx, [mem_block_start] |
||
219 | mov ecx, [mem_block_end] |
||
220 | .l1: |
||
221 | bsf eax,[ebx]; |
||
222 | jnz found |
||
223 | add ebx,4 |
||
224 | cmp ebx, ecx |
||
225 | jb .l1 |
||
226 | xor eax,eax |
||
227 | ret |
||
228 | |||
229 | found: |
||
230 | btr [ebx], eax |
||
231 | mov [mem_block_start],ebx |
||
232 | sub ebx, mem_block_map |
||
254 | serge | 233 | lea eax,[eax+ebx*8] |
164 | serge | 234 | shl eax, 5 |
235 | add eax, [mem_block_arr] |
||
170 | serge | 236 | dec [free_blocks] |
164 | serge | 237 | ret |
819 | serge | 238 | align 4 |
239 | free_mem_block: |
||
357 | serge | 240 | mov dword [eax], 0 |
241 | mov dword [eax+4], 0 |
||
242 | mov dword [eax+8], 0 |
||
243 | mov dword [eax+12], 0 |
||
244 | mov dword [eax+16], 0 |
||
245 | ; mov dword [eax+20], 0 |
||
246 | mov dword [eax+24], 0 |
||
247 | mov dword [eax+28], 0 |
||
248 | |||
164 | serge | 249 | sub eax, [mem_block_arr] |
250 | shr eax, 5 |
||
251 | |||
252 | mov ebx, mem_block_map |
||
253 | bts [ebx], eax |
||
170 | serge | 254 | inc [free_blocks] |
164 | serge | 255 | shr eax, 3 |
256 | and eax, not 3 |
||
257 | add eax, ebx |
||
258 | cmp [mem_block_start], eax |
||
259 | ja @f |
||
260 | ret |
||
261 | @@: |
||
262 | mov [mem_block_start], eax |
||
263 | ret |
||
264 | .err: |
||
265 | xor eax, eax |
||
266 | ret |
||
267 | |||
268 | align 4 |
||
269 | proc alloc_kernel_space stdcall, size:dword |
||
270 | local block_ind:DWORD |
||
271 | |||
660 | serge | 272 | push ebx |
273 | push esi |
||
274 | push edi |
||
275 | |||
164 | serge | 276 | mov eax, [size] |
206 | serge | 277 | add eax, 4095 |
278 | and eax, not 4095 |
||
164 | serge | 279 | mov [size], eax |
279 | serge | 280 | |
281 | mov ebx, heap_mutex |
||
282 | call wait_mutex ;ebx |
||
283 | |||
170 | serge | 284 | cmp eax, [heap_free] |
285 | ja .error |
||
164 | serge | 286 | |
819 | serge | 287 | call get_small_block ; eax |
369 | serge | 288 | test edi, edi |
164 | serge | 289 | jz .error |
290 | |||
291 | cmp [edi+block_flags], FREE_BLOCK |
||
292 | jne .error |
||
293 | |||
294 | mov [block_ind], ebx ;index of allocated block |
||
295 | |||
296 | mov eax, [edi+block_size] |
||
297 | cmp eax, [size] |
||
298 | je .m_eq_size |
||
299 | |||
300 | call alloc_mem_block |
||
301 | and eax, eax |
||
302 | jz .error |
||
303 | |||
304 | mov esi, eax ;esi - splitted block |
||
305 | |||
306 | mov [esi+block_next], edi |
||
307 | mov eax, [edi+block_prev] |
||
308 | mov [esi+block_prev], eax |
||
309 | mov [edi+block_prev], esi |
||
357 | serge | 310 | mov [esi+list_fd], 0 |
311 | mov [esi+list_bk], 0 |
||
164 | serge | 312 | and eax, eax |
313 | jz @f |
||
314 | mov [eax+block_next], esi |
||
315 | @@: |
||
316 | mov ebx, [edi+block_base] |
||
317 | mov [esi+block_base], ebx |
||
318 | mov edx, [size] |
||
319 | mov [esi+block_size], edx |
||
320 | add [edi+block_base], edx |
||
321 | sub [edi+block_size], edx |
||
322 | |||
323 | mov eax, [edi+block_size] |
||
324 | shr eax, 12 |
||
325 | sub eax, 1 |
||
326 | cmp eax, 63 |
||
327 | jna @f |
||
328 | mov eax, 63 |
||
329 | @@: |
||
330 | cmp eax, [block_ind] |
||
331 | je .m_eq_ind |
||
332 | |||
192 | serge | 333 | remove_from_list edi |
164 | serge | 334 | |
335 | mov ecx, [block_ind] |
||
211 | serge | 336 | mov [mem_block_list+ecx*4], edx |
164 | serge | 337 | |
211 | serge | 338 | test edx, edx |
164 | serge | 339 | jnz @f |
340 | btr [mem_block_mask], ecx |
||
341 | @@: |
||
342 | mov edx, [mem_block_list+eax*4] |
||
357 | serge | 343 | mov [edi+list_fd], edx |
164 | serge | 344 | test edx, edx |
345 | jz @f |
||
357 | serge | 346 | mov [edx+list_bk], edi |
164 | serge | 347 | @@: |
348 | mov [mem_block_list+eax*4], edi |
||
349 | bts [mem_block_mask], eax |
||
350 | .m_eq_ind: |
||
357 | serge | 351 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
352 | mov edx, [ecx+list_fd] |
||
353 | mov [esi+list_fd], edx |
||
354 | mov [esi+list_bk], ecx |
||
355 | mov [ecx+list_fd], esi |
||
356 | mov [edx+list_bk], esi |
||
357 | |||
164 | serge | 358 | mov [esi+block_flags], USED_BLOCK |
359 | mov eax, [esi+block_base] |
||
170 | serge | 360 | mov ebx, [size] |
361 | sub [heap_free], ebx |
||
279 | serge | 362 | and [heap_mutex], 0 |
660 | serge | 363 | pop edi |
364 | pop esi |
||
365 | pop ebx |
||
164 | serge | 366 | ret |
367 | .m_eq_size: |
||
368 | remove_from_list edi |
||
192 | serge | 369 | mov [mem_block_list+ebx*4], edx |
164 | serge | 370 | and edx, edx |
371 | jnz @f |
||
192 | serge | 372 | btr [mem_block_mask], ebx |
164 | serge | 373 | @@: |
357 | serge | 374 | mov ecx, mem_used.fd-MEM_LIST_OFFSET |
375 | mov edx, [ecx+list_fd] |
||
376 | mov [edi+list_fd], edx |
||
377 | mov [edi+list_bk], ecx |
||
378 | mov [ecx+list_fd], edi |
||
379 | mov [edx+list_bk], edi |
||
380 | |||
164 | serge | 381 | mov [edi+block_flags], USED_BLOCK |
382 | mov eax, [edi+block_base] |
||
170 | serge | 383 | mov ebx, [size] |
384 | sub [heap_free], ebx |
||
279 | serge | 385 | and [heap_mutex], 0 |
660 | serge | 386 | pop edi |
387 | pop esi |
||
388 | pop ebx |
||
164 | serge | 389 | ret |
390 | .error: |
||
391 | xor eax, eax |
||
279 | serge | 392 | mov [heap_mutex], eax |
660 | serge | 393 | pop edi |
394 | pop esi |
||
395 | pop ebx |
||
164 | serge | 396 | ret |
397 | endp |
||
398 | |||
399 | align 4 |
||
321 | diamond | 400 | proc free_kernel_space stdcall uses ebx ecx edx esi edi, base:dword |
660 | serge | 401 | push ebx |
402 | push esi |
||
403 | push edi |
||
279 | serge | 404 | mov ebx, heap_mutex |
405 | call wait_mutex ;ebx |
||
406 | |||
164 | serge | 407 | mov eax, [base] |
357 | serge | 408 | mov esi, [mem_used.fd] |
164 | serge | 409 | @@: |
357 | serge | 410 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
411 | je .fail |
||
164 | serge | 412 | |
413 | cmp [esi+block_base], eax |
||
414 | je .found |
||
357 | serge | 415 | mov esi, [esi+list_fd] |
164 | serge | 416 | jmp @b |
417 | .found: |
||
418 | cmp [esi+block_flags], USED_BLOCK |
||
419 | jne .fail |
||
420 | |||
170 | serge | 421 | mov eax, [esi+block_size] |
422 | add [heap_free], eax |
||
423 | |||
164 | serge | 424 | mov edi, [esi+block_next] |
425 | test edi, edi |
||
426 | jz .prev |
||
427 | |||
428 | cmp [edi+block_flags], FREE_BLOCK |
||
429 | jne .prev |
||
430 | |||
431 | remove_from_free edi |
||
432 | |||
433 | mov edx, [edi+block_next] |
||
434 | mov [esi+block_next], edx |
||
435 | test edx, edx |
||
436 | jz @f |
||
437 | |||
438 | mov [edx+block_prev], esi |
||
439 | @@: |
||
440 | mov ecx, [edi+block_size] |
||
441 | add [esi+block_size], ecx |
||
442 | |||
443 | mov eax, edi |
||
444 | call free_mem_block |
||
445 | .prev: |
||
446 | mov edi, [esi+block_prev] |
||
447 | test edi, edi |
||
448 | jz .insert |
||
449 | |||
450 | cmp [edi+block_flags], FREE_BLOCK |
||
451 | jne .insert |
||
452 | |||
453 | remove_from_used esi |
||
454 | |||
455 | mov edx, [esi+block_next] |
||
456 | mov [edi+block_next], edx |
||
457 | test edx, edx |
||
458 | jz @f |
||
459 | mov [edx+block_prev], edi |
||
460 | @@: |
||
461 | mov eax, esi |
||
462 | call free_mem_block |
||
463 | |||
464 | mov ecx, [edi+block_size] |
||
465 | mov eax, [esi+block_size] |
||
466 | add eax, ecx |
||
467 | mov [edi+block_size], eax |
||
468 | |||
469 | calc_index eax |
||
470 | calc_index ecx |
||
471 | cmp eax, ecx |
||
472 | je .m_eq |
||
473 | |||
474 | push ecx |
||
475 | remove_from_list edi |
||
476 | pop ecx |
||
477 | |||
478 | cmp [mem_block_list+ecx*4], edi |
||
479 | jne @f |
||
480 | mov [mem_block_list+ecx*4], edx |
||
481 | @@: |
||
482 | cmp [mem_block_list+ecx*4], 0 |
||
483 | jne @f |
||
484 | btr [mem_block_mask], ecx |
||
485 | @@: |
||
486 | mov esi, [mem_block_list+eax*4] |
||
487 | mov [mem_block_list+eax*4], edi |
||
357 | serge | 488 | mov [edi+list_fd], esi |
164 | serge | 489 | test esi, esi |
490 | jz @f |
||
357 | serge | 491 | mov [esi+list_bk], edi |
164 | serge | 492 | @@: |
493 | bts [mem_block_mask], eax |
||
494 | .m_eq: |
||
495 | xor eax, eax |
||
279 | serge | 496 | mov [heap_mutex], eax |
321 | diamond | 497 | dec eax |
660 | serge | 498 | pop edi |
499 | pop esi |
||
500 | pop ebx |
||
164 | serge | 501 | ret |
502 | .insert: |
||
503 | remove_from_used esi |
||
504 | |||
505 | mov eax, [esi+block_size] |
||
506 | calc_index eax |
||
507 | |||
508 | mov edi, [mem_block_list+eax*4] |
||
509 | mov [mem_block_list+eax*4], esi |
||
357 | serge | 510 | mov [esi+list_fd], edi |
164 | serge | 511 | test edi, edi |
512 | jz @f |
||
357 | serge | 513 | mov [edi+list_bk], esi |
164 | serge | 514 | @@: |
515 | bts [mem_block_mask], eax |
||
516 | mov [esi+block_flags],FREE_BLOCK |
||
517 | xor eax, eax |
||
279 | serge | 518 | mov [heap_mutex], eax |
321 | diamond | 519 | dec eax |
660 | serge | 520 | pop edi |
521 | pop esi |
||
522 | pop ebx |
||
164 | serge | 523 | ret |
524 | .fail: |
||
525 | xor eax, eax |
||
279 | serge | 526 | mov [heap_mutex], eax |
660 | serge | 527 | pop edi |
528 | pop esi |
||
529 | pop ebx |
||
164 | serge | 530 | ret |
531 | endp |
||
532 | |||
533 | align 4 |
||
534 | proc kernel_alloc stdcall, size:dword |
||
535 | locals |
||
536 | lin_addr dd ? |
||
537 | pages_count dd ? |
||
538 | endl |
||
539 | |||
662 | serge | 540 | push ebx |
541 | push edi |
||
542 | |||
164 | serge | 543 | mov eax, [size] |
206 | serge | 544 | add eax, 4095 |
545 | and eax, not 4095; |
||
164 | serge | 546 | mov [size], eax |
547 | and eax, eax |
||
357 | serge | 548 | jz .err |
164 | serge | 549 | mov ebx, eax |
550 | shr ebx, 12 |
||
551 | mov [pages_count], ebx |
||
552 | |||
553 | stdcall alloc_kernel_space, eax |
||
357 | serge | 554 | test eax, eax |
555 | jz .err |
||
164 | serge | 556 | mov [lin_addr], eax |
557 | |||
558 | mov ecx, [pages_count] |
||
559 | mov edx, eax |
||
560 | mov ebx, ecx |
||
561 | |||
562 | shr ecx, 3 |
||
563 | jz .next |
||
564 | |||
565 | and ebx, not 7 |
||
566 | push ebx |
||
567 | stdcall alloc_pages, ebx |
||
568 | pop ecx ; yes ecx!!! |
||
569 | and eax, eax |
||
357 | serge | 570 | jz .err |
164 | serge | 571 | |
572 | mov edi, eax |
||
573 | mov edx, [lin_addr] |
||
574 | @@: |
||
1710 | art_zh | 575 | stdcall map_page,edx,edi,dword [KERNEL_ALLOC_FLAG] |
164 | serge | 576 | add edx, 0x1000 |
577 | add edi, 0x1000 |
||
578 | dec ecx |
||
579 | jnz @B |
||
580 | .next: |
||
581 | mov ecx, [pages_count] |
||
582 | and ecx, 7 |
||
583 | jz .end |
||
357 | serge | 584 | @@: |
585 | push ecx |
||
164 | serge | 586 | call alloc_page |
587 | pop ecx |
||
588 | test eax, eax |
||
357 | serge | 589 | jz .err |
164 | serge | 590 | |
591 | stdcall map_page,edx,eax,dword PG_SW |
||
592 | add edx, 0x1000 |
||
593 | dec ecx |
||
594 | jnz @B |
||
595 | .end: |
||
596 | mov eax, [lin_addr] |
||
662 | serge | 597 | pop edi |
598 | pop ebx |
||
164 | serge | 599 | ret |
357 | serge | 600 | .err: |
164 | serge | 601 | xor eax, eax |
662 | serge | 602 | pop edi |
603 | pop ebx |
||
164 | serge | 604 | ret |
605 | endp |
||
606 | |||
607 | align 4 |
||
608 | proc kernel_free stdcall, base:dword |
||
321 | diamond | 609 | push ebx esi |
164 | serge | 610 | |
279 | serge | 611 | mov ebx, heap_mutex |
612 | call wait_mutex ;ebx |
||
613 | |||
164 | serge | 614 | mov eax, [base] |
357 | serge | 615 | mov esi, [mem_used.fd] |
164 | serge | 616 | @@: |
357 | serge | 617 | cmp esi, mem_used.fd-MEM_LIST_OFFSET |
618 | je .fail |
||
164 | serge | 619 | |
620 | cmp [esi+block_base], eax |
||
621 | je .found |
||
357 | serge | 622 | mov esi, [esi+list_fd] |
164 | serge | 623 | jmp @b |
624 | .found: |
||
625 | cmp [esi+block_flags], USED_BLOCK |
||
626 | jne .fail |
||
627 | |||
279 | serge | 628 | and [heap_mutex], 0 |
629 | |||
321 | diamond | 630 | push ecx |
164 | serge | 631 | mov ecx, [esi+block_size]; |
281 | serge | 632 | shr ecx, 12 |
279 | serge | 633 | call release_pages ;eax, ecx |
321 | diamond | 634 | pop ecx |
164 | serge | 635 | stdcall free_kernel_space, [base] |
321 | diamond | 636 | pop esi ebx |
279 | serge | 637 | ret |
164 | serge | 638 | .fail: |
1689 | art_zh | 639 | xor eax, eax |
640 | mov [heap_mutex], eax |
||
321 | diamond | 641 | pop esi ebx |
164 | serge | 642 | ret |
643 | endp |
||
644 | |||
645 | restore block_next |
||
646 | restore block_prev |
||
647 | restore block_list |
||
648 | restore block_base |
||
649 | restore block_size |
||
650 | restore block_flags |
||
651 | |||
652 | ;;;;;;;;;;;;;; USER ;;;;;;;;;;;;;;;;; |
||
653 | |||
188 | serge | 654 | HEAP_TOP equ 0x5FC00000 |
655 | |||
164 | serge | 656 | align 4 |
188 | serge | 657 | proc init_heap |
164 | serge | 658 | |
465 | serge | 659 | mov ebx,[current_slot] |
660 | mov eax, [ebx+APPDATA.heap_top] |
||
172 | serge | 661 | test eax, eax |
662 | jz @F |
||
465 | serge | 663 | sub eax,[ebx+APPDATA.heap_base] |
172 | serge | 664 | sub eax, 4096 |
665 | ret |
||
666 | @@: |
||
465 | serge | 667 | mov esi, [ebx+APPDATA.mem_size] |
188 | serge | 668 | add esi, 4095 |
669 | and esi, not 4095 |
||
465 | serge | 670 | mov [ebx+APPDATA.mem_size], esi |
188 | serge | 671 | mov eax, HEAP_TOP |
465 | serge | 672 | mov [ebx+APPDATA.heap_base], esi |
673 | mov [ebx+APPDATA.heap_top], eax |
||
164 | serge | 674 | |
188 | serge | 675 | sub eax, esi |
676 | shr esi, 10 |
||
677 | mov ecx, eax |
||
164 | serge | 678 | sub eax, 4096 |
188 | serge | 679 | or ecx, FREE_BLOCK |
365 | serge | 680 | mov [page_tabs+esi], ecx |
164 | serge | 681 | ret |
682 | endp |
||
683 | |||
684 | align 4 |
||
685 | proc user_alloc stdcall, alloc_size:dword |
||
686 | |||
662 | serge | 687 | push ebx |
688 | push esi |
||
689 | push edi |
||
690 | |||
164 | serge | 691 | mov ecx, [alloc_size] |
692 | add ecx, (4095+4096) |
||
693 | and ecx, not 4095 |
||
694 | |||
465 | serge | 695 | mov ebx, [current_slot] |
696 | mov esi, dword [ebx+APPDATA.heap_base] ; heap_base |
||
697 | mov edi, dword [ebx+APPDATA.heap_top] ; heap_top |
||
164 | serge | 698 | l_0: |
699 | cmp esi, edi |
||
700 | jae m_exit |
||
701 | |||
702 | mov ebx, esi |
||
703 | shr ebx, 12 |
||
365 | serge | 704 | mov eax, [page_tabs+ebx*4] |
620 | diamond | 705 | test al, FREE_BLOCK |
164 | serge | 706 | jz test_used |
707 | and eax, 0xFFFFF000 |
||
708 | cmp eax, ecx ;alloc_size |
||
709 | jb m_next |
||
940 | serge | 710 | jz @f |
164 | serge | 711 | |
620 | diamond | 712 | lea edx, [esi+ecx] |
713 | sub eax, ecx |
||
714 | or al, FREE_BLOCK |
||
164 | serge | 715 | shr edx, 12 |
365 | serge | 716 | mov [page_tabs+edx*4], eax |
294 | diamond | 717 | @@: |
164 | serge | 718 | or ecx, USED_BLOCK |
365 | serge | 719 | mov [page_tabs+ebx*4], ecx |
164 | serge | 720 | shr ecx, 12 |
620 | diamond | 721 | inc ebx |
164 | serge | 722 | dec ecx |
620 | diamond | 723 | jz .no |
164 | serge | 724 | @@: |
365 | serge | 725 | mov dword [page_tabs+ebx*4], 2 |
164 | serge | 726 | inc ebx |
727 | dec ecx |
||
728 | jnz @B |
||
620 | diamond | 729 | .no: |
164 | serge | 730 | |
465 | serge | 731 | mov edx, [current_slot] |
732 | mov ebx, [alloc_size] |
||
733 | add ebx, 0xFFF |
||
734 | and ebx, not 0xFFF |
||
735 | add ebx, [edx+APPDATA.mem_size] |
||
736 | call update_mem_size |
||
294 | diamond | 737 | |
620 | diamond | 738 | lea eax, [esi+4096] |
662 | serge | 739 | |
740 | pop edi |
||
741 | pop esi |
||
742 | pop ebx |
||
164 | serge | 743 | ret |
744 | test_used: |
||
620 | diamond | 745 | test al, USED_BLOCK |
164 | serge | 746 | jz m_exit |
747 | |||
748 | and eax, 0xFFFFF000 |
||
620 | diamond | 749 | m_next: |
164 | serge | 750 | add esi, eax |
751 | jmp l_0 |
||
752 | m_exit: |
||
753 | xor eax, eax |
||
662 | serge | 754 | pop edi |
755 | pop esi |
||
756 | pop ebx |
||
164 | serge | 757 | ret |
758 | endp |
||
759 | |||
760 | align 4 |
||
1289 | diamond | 761 | proc user_alloc_at stdcall, address:dword, alloc_size:dword |
762 | |||
763 | push ebx |
||
764 | push esi |
||
765 | push edi |
||
766 | |||
767 | mov ebx, [current_slot] |
||
768 | mov edx, [address] |
||
769 | and edx, not 0xFFF |
||
770 | mov [address], edx |
||
771 | sub edx, 0x1000 |
||
772 | jb .error |
||
773 | mov esi, [ebx+APPDATA.heap_base] |
||
774 | mov edi, [ebx+APPDATA.heap_top] |
||
775 | cmp edx, esi |
||
776 | jb .error |
||
777 | .scan: |
||
778 | cmp esi, edi |
||
779 | jae .error |
||
780 | mov ebx, esi |
||
781 | shr ebx, 12 |
||
782 | mov eax, [page_tabs+ebx*4] |
||
783 | mov ecx, eax |
||
784 | and ecx, 0xFFFFF000 |
||
785 | add ecx, esi |
||
786 | cmp edx, ecx |
||
787 | jb .found |
||
788 | mov esi, ecx |
||
789 | jmp .scan |
||
790 | .error: |
||
791 | xor eax, eax |
||
792 | pop edi |
||
793 | pop esi |
||
794 | pop ebx |
||
795 | ret |
||
796 | .found: |
||
797 | test al, FREE_BLOCK |
||
798 | jz .error |
||
799 | mov eax, ecx |
||
800 | sub eax, edx |
||
801 | sub eax, 0x1000 |
||
802 | cmp eax, [alloc_size] |
||
803 | jb .error |
||
804 | |||
805 | ; Here we have 1 big free block which includes requested area. |
||
806 | ; In general, 3 other blocks must be created instead: |
||
807 | ; free at [esi, edx); |
||
808 | ; busy at [edx, edx+0x1000+ALIGN_UP(alloc_size,0x1000)); |
||
809 | ; free at [edx+0x1000+ALIGN_UP(alloc_size,0x1000), ecx) |
||
810 | ; First or third block (or both) may be absent. |
||
811 | mov eax, edx |
||
812 | sub eax, esi |
||
813 | jz .nofirst |
||
814 | or al, FREE_BLOCK |
||
815 | mov [page_tabs+ebx*4], eax |
||
816 | .nofirst: |
||
817 | mov eax, [alloc_size] |
||
818 | add eax, 0x1FFF |
||
819 | and eax, not 0xFFF |
||
820 | mov ebx, edx |
||
821 | add edx, eax |
||
822 | shr ebx, 12 |
||
823 | or al, USED_BLOCK |
||
824 | mov [page_tabs+ebx*4], eax |
||
825 | shr eax, 12 |
||
826 | dec eax |
||
827 | jz .second_nofill |
||
828 | inc ebx |
||
829 | .fill: |
||
830 | mov dword [page_tabs+ebx*4], 2 |
||
831 | inc ebx |
||
832 | dec eax |
||
833 | jnz .fill |
||
834 | .second_nofill: |
||
835 | sub ecx, edx |
||
836 | jz .nothird |
||
837 | or cl, FREE_BLOCK |
||
838 | mov [page_tabs+ebx*4], ecx |
||
839 | .nothird: |
||
840 | |||
841 | mov edx, [current_slot] |
||
842 | mov ebx, [alloc_size] |
||
843 | add ebx, 0xFFF |
||
844 | and ebx, not 0xFFF |
||
845 | add ebx, [edx+APPDATA.mem_size] |
||
846 | call update_mem_size |
||
847 | |||
848 | mov eax, [address] |
||
849 | |||
850 | pop edi |
||
851 | pop esi |
||
852 | pop ebx |
||
853 | ret |
||
854 | endp |
||
855 | |||
856 | align 4 |
||
164 | serge | 857 | proc user_free stdcall, base:dword |
858 | |||
662 | serge | 859 | push esi |
860 | |||
164 | serge | 861 | mov esi, [base] |
862 | test esi, esi |
||
863 | jz .exit |
||
864 | |||
662 | serge | 865 | push ebx |
866 | |||
294 | diamond | 867 | xor ebx, ebx |
164 | serge | 868 | shr esi, 12 |
620 | diamond | 869 | mov eax, [page_tabs+(esi-1)*4] |
546 | diamond | 870 | test al, USED_BLOCK |
620 | diamond | 871 | jz .cantfree |
546 | diamond | 872 | test al, DONT_FREE_BLOCK |
873 | jnz .cantfree |
||
164 | serge | 874 | |
875 | and eax, not 4095 |
||
876 | mov ecx, eax |
||
620 | diamond | 877 | or al, FREE_BLOCK |
878 | mov [page_tabs+(esi-1)*4], eax |
||
164 | serge | 879 | sub ecx, 4096 |
620 | diamond | 880 | mov ebx, ecx |
164 | serge | 881 | shr ecx, 12 |
620 | diamond | 882 | jz .released |
164 | serge | 883 | .release: |
188 | serge | 884 | xor eax, eax |
365 | serge | 885 | xchg eax, [page_tabs+esi*4] |
620 | diamond | 886 | test al, 1 |
188 | serge | 887 | jz @F |
940 | serge | 888 | test eax, PG_SHARED |
889 | jnz @F |
||
164 | serge | 890 | call free_page |
448 | diamond | 891 | mov eax, esi |
892 | shl eax, 12 |
||
893 | invlpg [eax] |
||
188 | serge | 894 | @@: |
164 | serge | 895 | inc esi |
896 | dec ecx |
||
897 | jnz .release |
||
620 | diamond | 898 | .released: |
662 | serge | 899 | push edi |
900 | |||
465 | serge | 901 | mov edx, [current_slot] |
902 | mov esi, dword [edx+APPDATA.heap_base] |
||
903 | mov edi, dword [edx+APPDATA.heap_top] |
||
904 | sub ebx, [edx+APPDATA.mem_size] |
||
294 | diamond | 905 | neg ebx |
906 | call update_mem_size |
||
448 | diamond | 907 | call user_normalize |
662 | serge | 908 | pop edi |
909 | pop ebx |
||
910 | pop esi |
||
448 | diamond | 911 | ret |
912 | .exit: |
||
913 | xor eax, eax |
||
914 | inc eax |
||
662 | serge | 915 | pop esi |
448 | diamond | 916 | ret |
546 | diamond | 917 | .cantfree: |
918 | xor eax, eax |
||
662 | serge | 919 | pop ebx |
920 | pop esi |
||
546 | diamond | 921 | ret |
448 | diamond | 922 | endp |
923 | |||
924 | user_normalize: |
||
925 | ; in: esi=heap_base, edi=heap_top |
||
926 | ; out: eax=0 <=> OK |
||
927 | ; destroys: ebx,edx,esi,edi |
||
164 | serge | 928 | shr esi, 12 |
929 | shr edi, 12 |
||
930 | @@: |
||
365 | serge | 931 | mov eax, [page_tabs+esi*4] |
620 | diamond | 932 | test al, USED_BLOCK |
164 | serge | 933 | jz .test_free |
934 | shr eax, 12 |
||
935 | add esi, eax |
||
936 | jmp @B |
||
937 | .test_free: |
||
620 | diamond | 938 | test al, FREE_BLOCK |
164 | serge | 939 | jz .err |
940 | mov edx, eax |
||
941 | shr edx, 12 |
||
942 | add edx, esi |
||
943 | cmp edx, edi |
||
944 | jae .exit |
||
945 | |||
365 | serge | 946 | mov ebx, [page_tabs+edx*4] |
620 | diamond | 947 | test bl, USED_BLOCK |
164 | serge | 948 | jz .next_free |
949 | |||
950 | shr ebx, 12 |
||
951 | add edx, ebx |
||
952 | mov esi, edx |
||
953 | jmp @B |
||
954 | .next_free: |
||
620 | diamond | 955 | test bl, FREE_BLOCK |
164 | serge | 956 | jz .err |
365 | serge | 957 | and dword [page_tabs+edx*4], 0 |
164 | serge | 958 | add eax, ebx |
959 | and eax, not 4095 |
||
960 | or eax, FREE_BLOCK |
||
365 | serge | 961 | mov [page_tabs+esi*4], eax |
164 | serge | 962 | jmp @B |
963 | .exit: |
||
964 | xor eax, eax |
||
965 | inc eax |
||
966 | ret |
||
967 | .err: |
||
968 | xor eax, eax |
||
969 | ret |
||
970 | |||
448 | diamond | 971 | user_realloc: |
972 | ; in: eax = pointer, ebx = new size |
||
973 | ; out: eax = new pointer or NULL |
||
974 | test eax, eax |
||
975 | jnz @f |
||
976 | ; realloc(NULL,sz) - same as malloc(sz) |
||
977 | push ebx |
||
978 | call user_alloc |
||
979 | ret |
||
980 | @@: |
||
981 | push ecx edx |
||
465 | serge | 982 | lea ecx, [eax - 0x1000] |
448 | diamond | 983 | shr ecx, 12 |
984 | mov edx, [page_tabs+ecx*4] |
||
620 | diamond | 985 | test dl, USED_BLOCK |
448 | diamond | 986 | jnz @f |
987 | ; attempt to realloc invalid pointer |
||
988 | .ret0: |
||
989 | pop edx ecx |
||
990 | xor eax, eax |
||
991 | ret |
||
992 | @@: |
||
620 | diamond | 993 | test dl, DONT_FREE_BLOCK |
546 | diamond | 994 | jnz .ret0 |
448 | diamond | 995 | add ebx, 0x1FFF |
996 | shr edx, 12 |
||
997 | shr ebx, 12 |
||
998 | ; edx = allocated size, ebx = new size |
||
999 | add edx, ecx |
||
1000 | add ebx, ecx |
||
1001 | cmp edx, ebx |
||
1002 | jb .realloc_add |
||
1003 | ; release part of allocated memory |
||
1004 | .loop: |
||
1005 | cmp edx, ebx |
||
1006 | jz .release_done |
||
1007 | dec edx |
||
1008 | xor eax, eax |
||
1009 | xchg eax, [page_tabs+edx*4] |
||
1010 | test al, 1 |
||
1011 | jz .loop |
||
1012 | call free_page |
||
1013 | mov eax, edx |
||
1014 | shl eax, 12 |
||
1015 | invlpg [eax] |
||
1016 | jmp .loop |
||
1017 | .release_done: |
||
1018 | sub ebx, ecx |
||
1019 | cmp ebx, 1 |
||
1020 | jnz .nofreeall |
||
1021 | mov eax, [page_tabs+ecx*4] |
||
1022 | and eax, not 0xFFF |
||
465 | serge | 1023 | mov edx, [current_slot] |
1024 | mov ebx, [APPDATA.mem_size+edx] |
||
448 | diamond | 1025 | sub ebx, eax |
1026 | add ebx, 0x1000 |
||
1027 | or al, FREE_BLOCK |
||
1028 | mov [page_tabs+ecx*4], eax |
||
1029 | push esi edi |
||
465 | serge | 1030 | mov esi, [APPDATA.heap_base+edx] |
1031 | mov edi, [APPDATA.heap_top+edx] |
||
448 | diamond | 1032 | call update_mem_size |
1033 | call user_normalize |
||
1034 | pop edi esi |
||
1035 | jmp .ret0 ; all freed |
||
1036 | .nofreeall: |
||
1037 | sub edx, ecx |
||
1038 | shl ebx, 12 |
||
1039 | or ebx, USED_BLOCK |
||
1040 | xchg [page_tabs+ecx*4], ebx |
||
1041 | shr ebx, 12 |
||
1042 | sub ebx, edx |
||
1043 | push ebx ecx edx |
||
465 | serge | 1044 | mov edx, [current_slot] |
448 | diamond | 1045 | shl ebx, 12 |
465 | serge | 1046 | sub ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1047 | neg ebx |
1048 | call update_mem_size |
||
1049 | pop edx ecx ebx |
||
465 | serge | 1050 | lea eax, [ecx+1] |
448 | diamond | 1051 | shl eax, 12 |
1052 | push eax |
||
823 | diamond | 1053 | add ecx, edx |
1054 | lea edx, [ecx+ebx] |
||
448 | diamond | 1055 | shl ebx, 12 |
1056 | jz .ret |
||
1057 | push esi |
||
465 | serge | 1058 | mov esi, [current_slot] |
1059 | mov esi, [APPDATA.heap_top+esi] |
||
448 | diamond | 1060 | shr esi, 12 |
1061 | @@: |
||
1062 | cmp edx, esi |
||
1063 | jae .merge_done |
||
1064 | mov eax, [page_tabs+edx*4] |
||
1065 | test al, USED_BLOCK |
||
823 | diamond | 1066 | jnz .merge_done |
448 | diamond | 1067 | and dword [page_tabs+edx*4], 0 |
823 | diamond | 1068 | shr eax, 12 |
1069 | add edx, eax |
||
1070 | shl eax, 12 |
||
448 | diamond | 1071 | add ebx, eax |
1072 | jmp @b |
||
1073 | .merge_done: |
||
1074 | pop esi |
||
1075 | or ebx, FREE_BLOCK |
||
1076 | mov [page_tabs+ecx*4], ebx |
||
1077 | .ret: |
||
1078 | pop eax edx ecx |
||
1079 | ret |
||
1080 | .realloc_add: |
||
1081 | ; get some additional memory |
||
465 | serge | 1082 | mov eax, [current_slot] |
1083 | mov eax, [APPDATA.heap_top+eax] |
||
448 | diamond | 1084 | shr eax, 12 |
1085 | cmp edx, eax |
||
1086 | jae .cant_inplace |
||
1087 | mov eax, [page_tabs+edx*4] |
||
620 | diamond | 1088 | test al, FREE_BLOCK |
1089 | jz .cant_inplace |
||
448 | diamond | 1090 | shr eax, 12 |
1091 | add eax, edx |
||
620 | diamond | 1092 | sub eax, ebx |
448 | diamond | 1093 | jb .cant_inplace |
1094 | jz @f |
||
1095 | shl eax, 12 |
||
1096 | or al, FREE_BLOCK |
||
1097 | mov [page_tabs+ebx*4], eax |
||
1098 | @@: |
||
1099 | mov eax, ebx |
||
1100 | sub eax, ecx |
||
1101 | shl eax, 12 |
||
1102 | or al, USED_BLOCK |
||
1103 | mov [page_tabs+ecx*4], eax |
||
465 | serge | 1104 | lea eax, [ecx+1] |
448 | diamond | 1105 | shl eax, 12 |
1106 | push eax |
||
1107 | push edi |
||
1108 | lea edi, [page_tabs+edx*4] |
||
1109 | mov eax, 2 |
||
1110 | sub ebx, edx |
||
1111 | mov ecx, ebx |
||
1112 | cld |
||
1113 | rep stosd |
||
1114 | pop edi |
||
465 | serge | 1115 | mov edx, [current_slot] |
448 | diamond | 1116 | shl ebx, 12 |
465 | serge | 1117 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1118 | call update_mem_size |
1119 | pop eax edx ecx |
||
1120 | ret |
||
1121 | .cant_inplace: |
||
1122 | push esi edi |
||
465 | serge | 1123 | mov eax, [current_slot] |
1124 | mov esi, [APPDATA.heap_base+eax] |
||
1125 | mov edi, [APPDATA.heap_top+eax] |
||
448 | diamond | 1126 | shr esi, 12 |
1127 | shr edi, 12 |
||
1128 | sub ebx, ecx |
||
1129 | .find_place: |
||
1130 | cmp esi, edi |
||
1131 | jae .place_not_found |
||
1132 | mov eax, [page_tabs+esi*4] |
||
1133 | test al, FREE_BLOCK |
||
1134 | jz .next_place |
||
1135 | shr eax, 12 |
||
1136 | cmp eax, ebx |
||
1137 | jae .place_found |
||
1138 | add esi, eax |
||
1139 | jmp .find_place |
||
1140 | .next_place: |
||
1141 | shr eax, 12 |
||
1142 | add esi, eax |
||
1143 | jmp .find_place |
||
1144 | .place_not_found: |
||
1145 | pop edi esi |
||
1146 | jmp .ret0 |
||
1147 | .place_found: |
||
1148 | sub eax, ebx |
||
1149 | jz @f |
||
1150 | push esi |
||
620 | diamond | 1151 | add esi, ebx |
448 | diamond | 1152 | shl eax, 12 |
1153 | or al, FREE_BLOCK |
||
1154 | mov [page_tabs+esi*4], eax |
||
1155 | pop esi |
||
1156 | @@: |
||
1157 | mov eax, ebx |
||
1158 | shl eax, 12 |
||
1159 | or al, USED_BLOCK |
||
1160 | mov [page_tabs+esi*4], eax |
||
1161 | inc esi |
||
1162 | mov eax, esi |
||
1163 | shl eax, 12 |
||
1164 | push eax |
||
1165 | mov eax, [page_tabs+ecx*4] |
||
1166 | and eax, not 0xFFF |
||
1167 | or al, FREE_BLOCK |
||
1168 | sub edx, ecx |
||
1169 | mov [page_tabs+ecx*4], eax |
||
1170 | inc ecx |
||
620 | diamond | 1171 | dec ebx |
1172 | dec edx |
||
1173 | jz .no |
||
448 | diamond | 1174 | @@: |
1175 | xor eax, eax |
||
1176 | xchg eax, [page_tabs+ecx*4] |
||
1177 | mov [page_tabs+esi*4], eax |
||
940 | serge | 1178 | mov eax, ecx |
1179 | shl eax, 12 |
||
1180 | invlpg [eax] |
||
620 | diamond | 1181 | inc esi |
448 | diamond | 1182 | inc ecx |
1183 | dec ebx |
||
1184 | dec edx |
||
1185 | jnz @b |
||
620 | diamond | 1186 | .no: |
448 | diamond | 1187 | push ebx |
465 | serge | 1188 | mov edx, [current_slot] |
448 | diamond | 1189 | shl ebx, 12 |
465 | serge | 1190 | add ebx, [APPDATA.mem_size+edx] |
448 | diamond | 1191 | call update_mem_size |
1192 | pop ebx |
||
1193 | @@: |
||
1194 | mov dword [page_tabs+esi*4], 2 |
||
1195 | inc esi |
||
1196 | dec ebx |
||
1197 | jnz @b |
||
1198 | pop eax edi esi edx ecx |
||
1199 | ret |
||
1200 | |||
278 | serge | 1201 | if 0 |
164 | serge | 1202 | align 4 |
1203 | proc alloc_dll |
||
1204 | pushf |
||
1205 | cli |
||
1206 | bsf eax, [dll_map] |
||
1207 | jnz .find |
||
1208 | popf |
||
1209 | xor eax, eax |
||
1210 | ret |
||
1211 | .find: |
||
1212 | btr [dll_map], eax |
||
1213 | popf |
||
1214 | shl eax, 5 |
||
1215 | add eax, dll_tab |
||
1216 | ret |
||
1217 | endp |
||
1218 | |||
1219 | align 4 |
||
1220 | proc alloc_service |
||
1221 | pushf |
||
1222 | cli |
||
1223 | bsf eax, [srv_map] |
||
1224 | jnz .find |
||
1225 | popf |
||
1226 | xor eax, eax |
||
1227 | ret |
||
214 | serge | 1228 | .find: |
1229 | btr [srv_map], eax |
||
164 | serge | 1230 | popf |
214 | serge | 1231 | shl eax,0x02 |
1232 | lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36 |
||
164 | serge | 1233 | ret |
1234 | endp |
||
278 | serge | 1235 | |
1236 | end if |
||
940 | serge | 1237 | |
1238 | |||
1239 | ;;;;;;;;;;;;;; SHARED ;;;;;;;;;;;;;;;;; |
||
1240 | |||
1241 | |||
1242 | ; param |
||
1243 | ; eax= shm_map object |
||
1244 | |||
1245 | align 4 |
||
1246 | destroy_smap: |
||
1247 | |||
1248 | pushfd |
||
1249 | cli |
||
1250 | |||
945 | serge | 1251 | push esi |
1252 | push edi |
||
940 | serge | 1253 | |
945 | serge | 1254 | mov edi, eax |
1255 | mov esi, [eax+SMAP.parent] |
||
1256 | test esi, esi |
||
1257 | jz .done |
||
940 | serge | 1258 | |
945 | serge | 1259 | lock dec [esi+SMEM.refcount] |
1260 | jnz .done |
||
940 | serge | 1261 | |
945 | serge | 1262 | mov ecx, [esi+SMEM.bk] |
1263 | mov edx, [esi+SMEM.fd] |
||
1264 | |||
1265 | mov [ecx+SMEM.fd], edx |
||
1266 | mov [edx+SMEM.bk], ecx |
||
1267 | |||
1268 | stdcall kernel_free, [esi+SMEM.base] |
||
1269 | mov eax, esi |
||
1270 | call free |
||
1271 | .done: |
||
1272 | mov eax, edi |
||
940 | serge | 1273 | call destroy_kernel_object |
1274 | |||
945 | serge | 1275 | pop edi |
1276 | pop esi |
||
940 | serge | 1277 | popfd |
1278 | |||
1279 | ret |
||
1280 | |||
1281 | E_NOTFOUND equ 5 |
||
1282 | E_ACCESS equ 10 |
||
1283 | E_NOMEM equ 30 |
||
1284 | E_PARAM equ 33 |
||
1285 | |||
1286 | SHM_READ equ 0 |
||
1287 | SHM_WRITE equ 1 |
||
1288 | |||
1289 | SHM_ACCESS_MASK equ 3 |
||
1290 | |||
1291 | SHM_OPEN equ (0 shl 2) |
||
1292 | SHM_OPEN_ALWAYS equ (1 shl 2) |
||
1293 | SHM_CREATE equ (2 shl 2) |
||
1294 | |||
1295 | SHM_OPEN_MASK equ (3 shl 2) |
||
1296 | |||
1297 | align 4 |
||
1298 | proc shmem_open stdcall name:dword, size:dword, access:dword |
||
1299 | locals |
||
1300 | action dd ? |
||
1301 | owner_access dd ? |
||
1302 | mapped dd ? |
||
1303 | endl |
||
1304 | |||
1305 | push ebx |
||
1306 | push esi |
||
1307 | push edi |
||
1308 | |||
1309 | mov [mapped], 0 |
||
1310 | mov [owner_access], 0 |
||
1311 | |||
1312 | pushfd ;mutex required |
||
1313 | cli |
||
1314 | |||
1315 | mov eax, [access] |
||
1316 | and eax, SHM_OPEN_MASK |
||
1317 | mov [action], eax |
||
1318 | |||
1213 | serge | 1319 | mov ebx, [name] |
1320 | test ebx, ebx |
||
940 | serge | 1321 | mov edx, E_PARAM |
1213 | serge | 1322 | jz .fail |
940 | serge | 1323 | |
1324 | mov esi, [shmem_list.fd] |
||
1325 | align 4 |
||
1326 | @@: |
||
1327 | cmp esi, shmem_list |
||
1328 | je .not_found |
||
1329 | |||
943 | serge | 1330 | lea edx, [esi+SMEM.name] ; link , base, size |
1213 | serge | 1331 | stdcall strncmp, edx, ebx, 32 |
940 | serge | 1332 | test eax, eax |
1333 | je .found |
||
1334 | |||
943 | serge | 1335 | mov esi, [esi+SMEM.fd] |
940 | serge | 1336 | jmp @B |
1337 | |||
1338 | .not_found: |
||
1339 | mov eax, [action] |
||
1340 | |||
1341 | cmp eax, SHM_OPEN |
||
1342 | mov edx, E_NOTFOUND |
||
1213 | serge | 1343 | je .fail |
940 | serge | 1344 | |
1345 | cmp eax, SHM_CREATE |
||
1346 | mov edx, E_PARAM |
||
1347 | je .create_shm |
||
1348 | |||
1349 | cmp eax, SHM_OPEN_ALWAYS |
||
1213 | serge | 1350 | jne .fail |
940 | serge | 1351 | |
1352 | .create_shm: |
||
1353 | |||
1354 | mov ecx, [size] |
||
1355 | test ecx, ecx |
||
1213 | serge | 1356 | jz .fail |
940 | serge | 1357 | |
1358 | add ecx, 4095 |
||
1359 | and ecx, -4096 |
||
1360 | mov [size], ecx |
||
1361 | |||
943 | serge | 1362 | mov eax, SMEM.sizeof |
940 | serge | 1363 | call malloc |
1364 | test eax, eax |
||
1365 | mov esi, eax |
||
1366 | mov edx, E_NOMEM |
||
1213 | serge | 1367 | jz .fail |
940 | serge | 1368 | |
1369 | stdcall kernel_alloc, [size] |
||
1370 | test eax, eax |
||
1371 | mov [mapped], eax |
||
1372 | mov edx, E_NOMEM |
||
1373 | jz .cleanup |
||
1374 | |||
1375 | mov ecx, [size] |
||
1376 | mov edx, [access] |
||
1377 | and edx, SHM_ACCESS_MASK |
||
1378 | |||
943 | serge | 1379 | mov [esi+SMEM.base], eax |
1380 | mov [esi+SMEM.size], ecx |
||
1381 | mov [esi+SMEM.access], edx |
||
1382 | mov [esi+SMEM.refcount], 0 |
||
1383 | mov [esi+SMEM.name+28], 0 |
||
940 | serge | 1384 | |
943 | serge | 1385 | lea eax, [esi+SMEM.name] |
940 | serge | 1386 | stdcall strncpy, eax, [name], 31 |
1387 | |||
1388 | mov eax, [shmem_list.fd] |
||
943 | serge | 1389 | mov [esi+SMEM.bk], shmem_list |
1390 | mov [esi+SMEM.fd], eax |
||
940 | serge | 1391 | |
943 | serge | 1392 | mov [eax+SMEM.bk], esi |
940 | serge | 1393 | mov [shmem_list.fd], esi |
1394 | |||
1395 | mov [action], SHM_OPEN |
||
1396 | mov [owner_access], SHM_WRITE |
||
1397 | |||
1398 | .found: |
||
1399 | mov eax, [action] |
||
1400 | |||
1401 | cmp eax, SHM_CREATE |
||
1402 | mov edx, E_ACCESS |
||
1403 | je .exit |
||
1404 | |||
1405 | cmp eax, SHM_OPEN |
||
1406 | mov edx, E_PARAM |
||
1407 | je .create_map |
||
1408 | |||
1409 | cmp eax, SHM_OPEN_ALWAYS |
||
1213 | serge | 1410 | jne .fail |
940 | serge | 1411 | |
1412 | .create_map: |
||
1413 | |||
1414 | mov eax, [access] |
||
1415 | and eax, SHM_ACCESS_MASK |
||
943 | serge | 1416 | cmp eax, [esi+SMEM.access] |
940 | serge | 1417 | mov [access], eax |
1418 | mov edx, E_ACCESS |
||
1213 | serge | 1419 | ja .fail |
940 | serge | 1420 | |
1421 | mov ebx, [CURRENT_TASK] |
||
1422 | shl ebx, 5 |
||
1423 | mov ebx, [CURRENT_TASK+ebx+4] |
||
943 | serge | 1424 | mov eax, SMAP.sizeof |
940 | serge | 1425 | |
1426 | call create_kernel_object |
||
1427 | test eax, eax |
||
1428 | mov edi, eax |
||
1429 | mov edx, E_NOMEM |
||
1213 | serge | 1430 | jz .fail |
940 | serge | 1431 | |
1213 | serge | 1432 | inc [esi+SMEM.refcount] |
1433 | |||
943 | serge | 1434 | mov [edi+SMAP.magic], 'SMAP' |
1435 | mov [edi+SMAP.destroy], destroy_smap |
||
1213 | serge | 1436 | mov [edi+SMAP.parent], esi |
943 | serge | 1437 | mov [edi+SMAP.base], 0 |
940 | serge | 1438 | |
943 | serge | 1439 | stdcall user_alloc, [esi+SMEM.size] |
940 | serge | 1440 | test eax, eax |
1441 | mov [mapped], eax |
||
1442 | mov edx, E_NOMEM |
||
1443 | jz .cleanup2 |
||
1444 | |||
943 | serge | 1445 | mov [edi+SMAP.base], eax |
940 | serge | 1446 | |
943 | serge | 1447 | mov ecx, [esi+SMEM.size] |
940 | serge | 1448 | mov [size], ecx |
1449 | |||
1450 | shr ecx, 12 |
||
1451 | shr eax, 10 |
||
1452 | |||
943 | serge | 1453 | mov esi, [esi+SMEM.base] |
940 | serge | 1454 | shr esi, 10 |
1455 | lea edi, [page_tabs+eax] |
||
1456 | add esi, page_tabs |
||
1457 | |||
1458 | mov edx, [access] |
||
1459 | or edx, [owner_access] |
||
1460 | shl edx, 1 |
||
1461 | or edx, PG_USER+PG_SHARED |
||
1462 | @@: |
||
1463 | lodsd |
||
1464 | and eax, 0xFFFFF000 |
||
1465 | or eax, edx |
||
1466 | stosd |
||
1467 | loop @B |
||
1468 | |||
1469 | xor edx, edx |
||
1470 | |||
1471 | cmp [owner_access], 0 |
||
1213 | serge | 1472 | jne .fail |
1473 | .exit: |
||
940 | serge | 1474 | mov edx, [size] |
1213 | serge | 1475 | .fail: |
940 | serge | 1476 | mov eax, [mapped] |
1477 | |||
1478 | popfd |
||
1479 | pop edi |
||
1480 | pop esi |
||
1481 | pop ebx |
||
1482 | ret |
||
1483 | .cleanup: |
||
1213 | serge | 1484 | mov [size], edx |
940 | serge | 1485 | mov eax, esi |
1486 | call free |
||
1487 | jmp .exit |
||
1488 | |||
1489 | .cleanup2: |
||
1213 | serge | 1490 | mov [size], edx |
940 | serge | 1491 | mov eax, edi |
1492 | call destroy_smap |
||
1493 | jmp .exit |
||
1494 | endp |
||
943 | serge | 1495 | |
1496 | align 4 |
||
1497 | proc shmem_close stdcall, name:dword |
||
1498 | |||
1499 | mov eax, [name] |
||
1500 | test eax, eax |
||
1501 | jz .fail |
||
1502 | |||
1503 | push esi |
||
1504 | push edi |
||
945 | serge | 1505 | pushfd |
1506 | cli |
||
943 | serge | 1507 | |
1508 | mov esi, [current_slot] |
||
1509 | add esi, APP_OBJ_OFFSET |
||
1510 | .next: |
||
1511 | mov eax, [esi+APPOBJ.fd] |
||
1512 | test eax, eax |
||
1513 | jz @F |
||
1514 | |||
1515 | cmp eax, esi |
||
1516 | mov esi, eax |
||
1517 | je @F |
||
1518 | |||
1519 | cmp [eax+SMAP.magic], 'SMAP' |
||
1520 | jne .next |
||
1521 | |||
1522 | mov edi, [eax+SMAP.parent] |
||
1523 | test edi, edi |
||
1524 | jz .next |
||
1525 | |||
1501 | mario79 | 1526 | lea edi, [edi+SMEM.name] |
943 | serge | 1527 | stdcall strncmp, [name], edi, 32 |
1528 | test eax, eax |
||
1529 | jne .next |
||
1530 | |||
945 | serge | 1531 | stdcall user_free, [esi+SMAP.base] |
1532 | |||
1501 | mario79 | 1533 | mov eax,esi |
943 | serge | 1534 | call [esi+APPOBJ.destroy] |
1535 | @@: |
||
945 | serge | 1536 | popfd |
943 | serge | 1537 | pop edi |
1538 | pop esi |
||
1539 | .fail: |
||
1540 | ret |
||
1541 | endp |
||
1710 | art_zh | 1542 | diff16 "heap code end ",0,$ |
1543 | diff16 "heap code size",init_kernel_heap,$=> |