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Rev | Author | Line No. | Line |
---|---|---|---|
164 | serge | 1 | |
212 | serge | 2 | ;HEAP_SIZE equ 0x01000000 |
164 | serge | 3 | |
4 | |||
5 | { .next_block dd ? |
||
6 | .prev_block dd ? ;+4 |
||
7 | .list_next dd ? ;+8 |
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8 | .list_prev dd ? ;+12 |
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9 | .base dd ? ;+16 |
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10 | .size dd ? ;+20 |
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11 | .flags dd ? ;+24 |
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12 | .handle dd ? ;+28 |
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13 | } |
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14 | |||
15 | |||
16 | USED_BLOCK equ 8 |
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17 | |||
18 | |||
19 | MEM_BLOCK MEM_BLOCK |
||
20 | end virtual |
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21 | |||
22 | |||
23 | |||
24 | |||
25 | block_prev equ MEM_BLOCK.prev_block |
||
26 | list_next equ MEM_BLOCK.list_next |
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27 | list_prev equ MEM_BLOCK.list_prev |
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28 | block_base equ MEM_BLOCK.base |
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29 | block_size equ MEM_BLOCK.size |
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30 | block_flags equ MEM_BLOCK.flags |
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31 | |||
32 | |||
33 | { shr op, 12 |
||
34 | dec op |
||
35 | cmp op, 63 |
||
36 | jna @f |
||
37 | mov op, 63 |
||
38 | @@: |
||
39 | } |
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40 | |||
41 | |||
42 | { mov edx, [op+list_next] |
||
43 | mov ecx, [op+list_prev] |
||
44 | test edx, edx |
||
45 | jz @f |
||
46 | mov [edx+list_prev], ecx |
||
47 | @@: |
||
48 | test ecx, ecx |
||
49 | jz @f |
||
50 | mov [ecx+list_next], edx |
||
51 | @@: |
||
52 | mov [op+list_next],0 |
||
53 | mov [op+list_prev],0 |
||
54 | } |
||
55 | |||
56 | |||
57 | { |
||
58 | remove_from_list op |
||
59 | |||
60 | |||
61 | calc_index eax |
||
62 | cmp [mem_block_list+eax*4], op |
||
63 | jne @f |
||
64 | mov [mem_block_list+eax*4], edx |
||
65 | @@: |
||
66 | cmp [mem_block_list+eax*4], 0 |
||
67 | jne @f |
||
68 | btr [mem_block_mask], eax |
||
69 | @@: |
||
70 | } |
||
71 | |||
72 | |||
73 | { |
||
74 | remove_from_list op |
||
75 | cmp [mem_used_list], op |
||
76 | jne @f |
||
77 | mov [mem_used_list], edx |
||
78 | @@: |
||
79 | } |
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80 | |||
81 | |||
82 | proc init_kernel_heap |
||
83 | |||
84 | |||
85 | mov edi, mem_block_list |
||
86 | xor eax, eax |
||
87 | cld |
||
88 | rep stosd |
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89 | |||
90 | |||
91 | mov edi, mem_block_map |
||
92 | not eax |
||
93 | rep stosd |
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94 | |||
95 | |||
96 | mov [mem_block_end], mem_block_map+512 |
||
97 | mov [mem_block_arr], HEAP_BASE |
||
98 | |||
99 | |||
100 | mov ecx, 32 |
||
101 | mov edx, eax |
||
102 | mov edi, HEAP_BASE |
||
103 | .l1: |
||
104 | stdcall map_page,edi,edx,PG_SW |
||
105 | add edi, 0x1000 |
||
106 | add edx, 0x1000 |
||
107 | dec ecx |
||
108 | jnz .l1 |
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109 | |||
110 | |||
111 | mov ebx, edi |
||
112 | add ebx, MEM_BLOCK_SIZE |
||
113 | xor eax, eax |
||
114 | mov [edi+block_next], ebx |
||
115 | mov [edi+block_prev], eax |
||
116 | mov [edi+list_next], eax |
||
117 | mov [edi+list_prev], eax |
||
118 | mov [edi+block_base], HEAP_BASE |
||
119 | mov [edi+block_size], 4096*MEM_BLOCK_SIZE |
||
120 | mov [edi+block_flags], USED_BLOCK |
||
121 | |||
122 | |||
123 | mov [ebx+block_prev], eax |
||
124 | mov [ebx+list_next], eax |
||
125 | mov [ebx+block_base], HEAP_BASE+4096*MEM_BLOCK_SIZE |
||
126 | |||
127 | |||
128 | sub ecx, HEAP_BASE + 4096*MEM_BLOCK_SIZE |
||
212 | serge | 129 | mov [heap_size], ecx |
170 | serge | 130 | mov [heap_free], ecx |
131 | mov [ebx+block_size], ecx |
||
164 | serge | 132 | mov [ebx+block_flags], FREE_BLOCK |
133 | |||
134 | |||
135 | mov [mem_block_mask+4],0x80000000 |
||
136 | |||
137 | |||
138 | mov [mem_block_list+63*4], ebx |
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139 | mov byte [mem_block_map], 0xFC |
||
140 | mov [heap_blocks], 4095 |
||
170 | serge | 141 | mov [free_blocks], 4095 |
142 | ret |
||
164 | serge | 143 | endp |
144 | |||
145 | |||
146 | proc get_block stdcall, index:dword |
||
147 | |||
148 | |||
149 | mov ecx, [index] |
||
150 | cmp ecx, eax |
||
151 | jna @f |
||
152 | ;cmova ecx, eax |
||
153 | mov ecx, eax |
||
154 | @@: |
||
155 | xor esi, esi |
||
156 | xor ebx, ebx |
||
157 | xor edx, edx |
||
158 | not edx |
||
159 | |||
160 | |||
161 | jb .bit_test |
||
162 | |||
163 | |||
164 | add ebx, 32 |
||
165 | add esi, 4 |
||
166 | |||
167 | |||
168 | shl edx, cl |
||
169 | and edx, [mem_block_mask+esi] |
||
170 | jz .high_mask |
||
171 | bsf eax, edx |
||
172 | add ebx, eax |
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173 | mov eax, [mem_block_list+ebx*4] |
||
174 | ret |
||
175 | |||
176 | |||
177 | |||
178 | |||
179 | add ebx, 32 |
||
180 | test esi, 0xFFFFFFF8 |
||
181 | jnz .big_error |
||
182 | mov edx, [mem_block_mask+esi] |
||
183 | and edx, edx |
||
184 | jz .high_mask |
||
185 | bsf eax, edx |
||
186 | add ebx, eax |
||
187 | mov eax, [mem_block_list+ebx*4] |
||
188 | ret |
||
189 | |||
190 | |||
191 | xor eax, eax |
||
192 | ret |
||
193 | endp |
||
194 | |||
195 | |||
196 | proc alloc_mem_block |
||
197 | |||
198 | |||
199 | cli |
||
200 | mov ebx, [mem_block_start] |
||
201 | mov ecx, [mem_block_end] |
||
202 | .l1: |
||
203 | bsf eax,[ebx]; |
||
204 | jnz found |
||
205 | add ebx,4 |
||
206 | cmp ebx, ecx |
||
207 | jb .l1 |
||
208 | popfd |
||
209 | xor eax,eax |
||
210 | ret |
||
211 | |||
212 | |||
213 | btr [ebx], eax |
||
214 | mov [mem_block_start],ebx |
||
215 | sub ebx, mem_block_map |
||
216 | lea eax,[eax+ebx*8] |
||
254 | serge | 217 | shl eax, 5 |
164 | serge | 218 | add eax, [mem_block_arr] |
219 | dec [free_blocks] |
||
170 | serge | 220 | popfd |
164 | serge | 221 | ret |
222 | endp |
||
223 | |||
224 | |||
225 | pushfd |
||
226 | cli |
||
227 | sub eax, [mem_block_arr] |
||
228 | shr eax, 5 |
||
229 | |||
230 | |||
231 | bts [ebx], eax |
||
232 | inc [free_blocks] |
||
170 | serge | 233 | shr eax, 3 |
164 | serge | 234 | and eax, not 3 |
235 | add eax, ebx |
||
236 | cmp [mem_block_start], eax |
||
237 | ja @f |
||
238 | popfd |
||
239 | ret |
||
240 | @@: |
||
241 | mov [mem_block_start], eax |
||
242 | popfd |
||
243 | ret |
||
244 | .err: |
||
245 | xor eax, eax |
||
246 | popfd |
||
247 | ret |
||
248 | endp |
||
249 | |||
250 | |||
251 | proc alloc_kernel_space stdcall, size:dword |
||
252 | local block_ind:DWORD |
||
253 | |||
254 | |||
255 | cli |
||
256 | |||
257 | |||
258 | add eax, 4095 |
||
206 | serge | 259 | and eax, not 4095 |
260 | mov [size], eax |
||
164 | serge | 261 | cmp eax, [heap_free] |
170 | serge | 262 | ja .error |
263 | |||
164 | serge | 264 | |
265 | sub eax, 1 |
||
266 | |||
267 | |||
268 | |||
269 | |||
270 | and eax, eax |
||
271 | jz .error |
||
272 | |||
273 | |||
274 | |||
275 | |||
276 | jne .error |
||
277 | |||
278 | |||
279 | |||
280 | |||
281 | cmp eax, [size] |
||
282 | je .m_eq_size |
||
283 | |||
284 | |||
285 | and eax, eax |
||
286 | jz .error |
||
287 | |||
288 | |||
289 | |||
290 | |||
291 | mov eax, [edi+block_prev] |
||
292 | mov [esi+block_prev], eax |
||
293 | mov [edi+block_prev], esi |
||
294 | mov [esi+list_next], 0 |
||
295 | mov [esi+list_prev], 0 |
||
296 | and eax, eax |
||
297 | jz @f |
||
298 | mov [eax+block_next], esi |
||
299 | @@: |
||
300 | mov ebx, [edi+block_base] |
||
301 | mov [esi+block_base], ebx |
||
302 | mov edx, [size] |
||
303 | mov [esi+block_size], edx |
||
304 | add [edi+block_base], edx |
||
305 | sub [edi+block_size], edx |
||
306 | |||
307 | |||
308 | shr eax, 12 |
||
309 | sub eax, 1 |
||
310 | cmp eax, 63 |
||
311 | jna @f |
||
312 | mov eax, 63 |
||
313 | @@: |
||
314 | cmp eax, [block_ind] |
||
315 | je .m_eq_ind |
||
316 | |||
317 | |||
192 | serge | 318 | |
164 | serge | 319 | |
320 | mov [mem_block_list+ecx*4], edx |
||
211 | serge | 321 | |
164 | serge | 322 | |
211 | serge | 323 | jnz @f |
164 | serge | 324 | btr [mem_block_mask], ecx |
325 | @@: |
||
326 | mov edx, [mem_block_list+eax*4] |
||
327 | mov [edi+list_next], edx |
||
328 | test edx, edx |
||
329 | jz @f |
||
330 | mov [edx+list_prev], edi |
||
331 | @@: |
||
332 | mov [mem_block_list+eax*4], edi |
||
333 | bts [mem_block_mask], eax |
||
334 | .m_eq_ind: |
||
335 | mov ebx, [mem_used_list] |
||
336 | mov [esi+list_next], ebx |
||
337 | test ebx, ebx |
||
338 | jz @f |
||
339 | mov [ebx+list_prev], esi |
||
340 | @@: |
||
341 | mov [esi+block_flags], USED_BLOCK |
||
342 | mov [mem_used_list], esi |
||
343 | mov eax, [esi+block_base] |
||
344 | mov ebx, [size] |
||
170 | serge | 345 | sub [heap_free], ebx |
346 | popfd |
||
164 | serge | 347 | ret |
348 | |||
349 | |||
350 | remove_from_list edi |
||
351 | mov [mem_block_list+ebx*4], edx |
||
192 | serge | 352 | and edx, edx |
164 | serge | 353 | jnz @f |
354 | btr [mem_block_mask], ebx |
||
192 | serge | 355 | @@: |
164 | serge | 356 | mov ecx, [mem_used_list] |
192 | serge | 357 | mov [edi+list_next], ecx |
358 | test ecx, ecx |
||
359 | jnz @f |
||
164 | serge | 360 | mov [ecx+list_prev], edi |
192 | serge | 361 | @@: |
164 | serge | 362 | mov [mem_used_list], edi |
363 | mov [edi+block_flags], USED_BLOCK |
||
364 | mov eax, [edi+block_base] |
||
365 | mov ebx, [size] |
||
170 | serge | 366 | sub [heap_free], ebx |
367 | popfd |
||
164 | serge | 368 | ret |
369 | .error: |
||
370 | xor eax, eax |
||
371 | popfd |
||
372 | ret |
||
373 | endp |
||
374 | |||
375 | |||
376 | proc free_kernel_space stdcall, base:dword |
||
377 | |||
378 | |||
379 | mov esi, [mem_used_list] |
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380 | @@: |
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381 | test esi, esi |
||
382 | jz .fail |
||
383 | |||
384 | |||
385 | je .found |
||
386 | mov esi, [esi+list_next] |
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387 | jmp @b |
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388 | .found: |
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389 | cmp [esi+block_flags], USED_BLOCK |
||
390 | jne .fail |
||
391 | |||
392 | |||
170 | serge | 393 | add [heap_free], eax |
394 | |||
395 | |||
164 | serge | 396 | test edi, edi |
397 | jz .prev |
||
398 | |||
399 | |||
400 | jne .prev |
||
401 | |||
402 | |||
403 | |||
404 | |||
405 | mov [esi+block_next], edx |
||
406 | test edx, edx |
||
407 | jz @f |
||
408 | |||
409 | |||
410 | @@: |
||
411 | mov ecx, [edi+block_size] |
||
412 | add [esi+block_size], ecx |
||
413 | |||
414 | |||
415 | call free_mem_block |
||
416 | .prev: |
||
417 | mov edi, [esi+block_prev] |
||
418 | test edi, edi |
||
419 | jz .insert |
||
420 | |||
421 | |||
422 | jne .insert |
||
423 | |||
424 | |||
425 | |||
426 | |||
427 | mov [edi+block_next], edx |
||
428 | test edx, edx |
||
429 | jz @f |
||
430 | mov [edx+block_prev], edi |
||
431 | @@: |
||
432 | mov eax, esi |
||
433 | call free_mem_block |
||
434 | |||
435 | |||
436 | mov eax, [esi+block_size] |
||
437 | add eax, ecx |
||
438 | mov [edi+block_size], eax |
||
439 | |||
440 | |||
441 | calc_index ecx |
||
442 | cmp eax, ecx |
||
443 | je .m_eq |
||
444 | |||
445 | |||
446 | remove_from_list edi |
||
447 | pop ecx |
||
448 | |||
449 | |||
450 | jne @f |
||
451 | mov [mem_block_list+ecx*4], edx |
||
452 | @@: |
||
453 | cmp [mem_block_list+ecx*4], 0 |
||
454 | jne @f |
||
455 | btr [mem_block_mask], ecx |
||
456 | @@: |
||
457 | mov esi, [mem_block_list+eax*4] |
||
458 | mov [mem_block_list+eax*4], edi |
||
459 | mov [edi+list_next], esi |
||
460 | test esi, esi |
||
461 | jz @f |
||
462 | mov [esi+list_prev], edi |
||
463 | @@: |
||
464 | bts [mem_block_mask], eax |
||
465 | .m_eq: |
||
466 | xor eax, eax |
||
467 | not eax |
||
468 | ret |
||
469 | .insert: |
||
470 | remove_from_used esi |
||
471 | |||
472 | |||
473 | calc_index eax |
||
474 | |||
475 | |||
476 | mov [mem_block_list+eax*4], esi |
||
477 | mov [esi+list_next], edi |
||
478 | test edi, edi |
||
479 | jz @f |
||
480 | mov [edi+list_prev], esi |
||
481 | @@: |
||
482 | bts [mem_block_mask], eax |
||
483 | mov [esi+block_flags],FREE_BLOCK |
||
484 | xor eax, eax |
||
485 | not eax |
||
486 | ret |
||
487 | .fail: |
||
488 | xor eax, eax |
||
489 | ret |
||
490 | endp |
||
491 | |||
492 | |||
493 | proc kernel_alloc stdcall, size:dword |
||
494 | locals |
||
495 | lin_addr dd ? |
||
496 | pages_count dd ? |
||
497 | endl |
||
498 | |||
499 | |||
500 | add eax, 4095 |
||
206 | serge | 501 | and eax, not 4095; |
502 | mov [size], eax |
||
164 | serge | 503 | and eax, eax |
504 | jz .error |
||
505 | mov ebx, eax |
||
506 | shr ebx, 12 |
||
507 | mov [pages_count], ebx |
||
508 | |||
509 | |||
510 | and eax, eax |
||
511 | jz .error |
||
512 | mov [lin_addr], eax |
||
513 | |||
514 | |||
515 | mov edx, eax |
||
516 | mov ebx, ecx |
||
517 | |||
518 | |||
519 | jz .next |
||
520 | |||
521 | |||
522 | push ebx |
||
523 | stdcall alloc_pages, ebx |
||
524 | pop ecx ; yes ecx!!! |
||
525 | and eax, eax |
||
526 | jz .error |
||
527 | |||
528 | |||
529 | mov edx, [lin_addr] |
||
530 | @@: |
||
531 | stdcall map_page,edx,edi,dword PG_SW |
||
532 | add edx, 0x1000 |
||
533 | add edi, 0x1000 |
||
534 | dec ecx |
||
535 | jnz @B |
||
536 | .next: |
||
537 | mov ecx, [pages_count] |
||
538 | and ecx, 7 |
||
539 | jz .end |
||
540 | |||
541 | |||
542 | call alloc_page |
||
543 | pop ecx |
||
544 | test eax, eax |
||
545 | jz .error |
||
546 | |||
547 | |||
548 | add edx, 0x1000 |
||
549 | dec ecx |
||
550 | jnz @B |
||
551 | .end: |
||
552 | mov eax, [lin_addr] |
||
553 | ret |
||
554 | |||
555 | |||
556 | xor eax, eax |
||
557 | ret |
||
558 | endp |
||
559 | |||
560 | |||
561 | proc kernel_free stdcall, base:dword |
||
562 | locals |
||
563 | size dd ? |
||
564 | endl |
||
565 | |||
566 | |||
567 | mov esi, [mem_used_list] |
||
568 | @@: |
||
569 | test esi, esi |
||
570 | jz .fail |
||
571 | |||
572 | |||
573 | je .found |
||
574 | mov esi, [esi+list_next] |
||
575 | jmp @b |
||
576 | .found: |
||
577 | cmp [esi+block_flags], USED_BLOCK |
||
578 | jne .fail |
||
579 | |||
580 | |||
581 | mov [size], ecx |
||
582 | |||
583 | |||
584 | test eax, eax |
||
585 | jz .fail |
||
586 | |||
587 | |||
588 | mov edi, [base] |
||
589 | |||
590 | |||
591 | mov esi, edi |
||
592 | shr edi, 10 |
||
593 | add edi, pages_tab |
||
594 | xor edx, edx |
||
595 | .release: |
||
596 | mov eax, [edi] |
||
597 | test eax, 1 |
||
598 | jz .next |
||
599 | |||
600 | |||
601 | mov [edi],edx |
||
602 | .next: |
||
603 | invlpg [esi] |
||
604 | add esi, 0x1000 |
||
605 | add edi, 4 |
||
606 | dec ecx |
||
607 | jnz .release |
||
608 | .fail: |
||
609 | ret |
||
610 | endp |
||
611 | |||
612 | |||
613 | restore block_prev |
||
614 | restore block_list |
||
615 | restore block_base |
||
616 | restore block_size |
||
617 | restore block_flags |
||
618 | |||
619 | |||
620 | |||
621 | |||
188 | serge | 622 | |
623 | |||
164 | serge | 624 | proc init_heap |
188 | serge | 625 | |
164 | serge | 626 | |
172 | serge | 627 | shl ebx,8 |
628 | mov eax, [PROC_BASE+APPDATA.heap_top+ebx] |
||
629 | test eax, eax |
||
630 | jz @F |
||
631 | sub eax,[PROC_BASE+APPDATA.heap_base+ebx] |
||
632 | sub eax, 4096 |
||
633 | ret |
||
634 | @@: |
||
635 | mov esi, [PROC_BASE+APPDATA.mem_size+ebx] |
||
636 | add esi, 4095 |
||
188 | serge | 637 | and esi, not 4095 |
638 | mov eax, HEAP_TOP |
||
639 | mov [PROC_BASE+APPDATA.heap_base+ebx], esi |
||
172 | serge | 640 | mov [PROC_BASE+APPDATA.heap_top+ebx], eax |
188 | serge | 641 | |
164 | serge | 642 | |
188 | serge | 643 | add esi, new_app_base |
644 | shr esi, 10 |
||
645 | mov ecx, eax |
||
646 | sub eax, 4096 |
||
164 | serge | 647 | or ecx, FREE_BLOCK |
188 | serge | 648 | mov [pages_tab+esi], ecx |
649 | ret |
||
164 | serge | 650 | .exit: |
651 | xor eax, eax |
||
652 | ret |
||
653 | endp |
||
654 | |||
655 | |||
656 | proc user_alloc stdcall, alloc_size:dword |
||
657 | |||
658 | |||
659 | add ecx, (4095+4096) |
||
660 | and ecx, not 4095 |
||
661 | |||
662 | |||
663 | shl ebx, 8 |
||
664 | mov esi, dword [ebx+PROC_BASE+APPDATA.heap_base]; heap_base |
||
172 | serge | 665 | mov edi, dword [ebx+PROC_BASE+APPDATA.heap_top]; heap_top |
666 | add esi, new_app_base |
||
164 | serge | 667 | add edi, new_app_base |
668 | |||
669 | |||
670 | cmp esi, edi |
||
671 | jae m_exit |
||
672 | |||
673 | |||
674 | shr ebx, 12 |
||
675 | mov eax, [pages_tab+ebx*4] |
||
676 | test eax, FREE_BLOCK |
||
677 | jz test_used |
||
678 | and eax, 0xFFFFF000 |
||
679 | cmp eax, ecx ;alloc_size |
||
680 | jb m_next |
||
681 | |||
682 | |||
683 | add edx, ecx |
||
684 | sub eax, ecx; |
||
685 | or eax, FREE_BLOCK |
||
686 | shr edx, 12 |
||
687 | mov [pages_tab+edx*4], eax |
||
688 | |||
214 | serge | 689 | |
164 | serge | 690 | mov [pages_tab+ebx*4], ecx |
691 | shr ecx, 12 |
||
692 | dec ecx |
||
693 | inc ebx |
||
694 | @@: |
||
695 | mov dword [pages_tab+ebx*4], 2 |
||
696 | inc ebx |
||
697 | dec ecx |
||
698 | jnz @B |
||
699 | |||
700 | |||
701 | add eax, 4096 |
||
702 | sub eax, new_app_base |
||
703 | ret |
||
704 | m_next: |
||
705 | add esi, eax |
||
706 | jmp l_0 |
||
707 | test_used: |
||
708 | test eax, USED_BLOCK |
||
709 | jz m_exit |
||
710 | |||
711 | |||
712 | add esi, eax |
||
713 | jmp l_0 |
||
714 | m_exit: |
||
715 | xor eax, eax |
||
716 | ret |
||
717 | endp |
||
718 | |||
719 | |||
720 | proc user_free stdcall, base:dword |
||
721 | |||
722 | |||
723 | test esi, esi |
||
724 | jz .exit |
||
725 | |||
726 | |||
727 | shr esi, 12 |
||
728 | mov eax, [pages_tab+esi*4] |
||
729 | test eax, USED_BLOCK |
||
730 | jz .not_used |
||
188 | serge | 731 | |
164 | serge | 732 | |
733 | mov ecx, eax |
||
734 | or eax, FREE_BLOCK |
||
735 | mov [pages_tab+esi*4], eax |
||
736 | inc esi |
||
737 | sub ecx, 4096 |
||
738 | shr ecx, 12 |
||
739 | .release: |
||
740 | xor eax, eax |
||
188 | serge | 741 | xchg eax, [pages_tab+esi*4] |
742 | test eax, 1 |
||
743 | jz @F |
||
744 | call free_page |
||
164 | serge | 745 | @@: |
188 | serge | 746 | inc esi |
164 | serge | 747 | dec ecx |
748 | jnz .release |
||
749 | .not_used: |
||
188 | serge | 750 | mov ebx, [CURRENT_TASK] |
164 | serge | 751 | shl ebx, 8 |
752 | mov esi, dword [ebx+PROC_BASE+APPDATA.heap_base]; heap_base |
||
172 | serge | 753 | mov edi, dword [ebx+PROC_BASE+APPDATA.heap_top]; heap_top |
754 | add esi, new_app_base |
||
266 | serge | 755 | add edi, new_app_base |
756 | shr esi, 12 |
||
164 | serge | 757 | shr edi, 12 |
758 | @@: |
||
759 | mov eax, [pages_tab+esi*4] |
||
760 | test eax, USED_BLOCK |
||
761 | jz .test_free |
||
762 | shr eax, 12 |
||
763 | add esi, eax |
||
764 | jmp @B |
||
765 | .test_free: |
||
766 | test eax, FREE_BLOCK |
||
767 | jz .err |
||
768 | mov edx, eax |
||
769 | shr edx, 12 |
||
770 | add edx, esi |
||
771 | cmp edx, edi |
||
772 | jae .exit |
||
773 | |||
774 | |||
775 | test ebx, USED_BLOCK |
||
776 | jz .next_free |
||
777 | |||
778 | |||
779 | add edx, ebx |
||
780 | mov esi, edx |
||
781 | jmp @B |
||
782 | .next_free: |
||
783 | test ebx, FREE_BLOCK |
||
784 | jz .err |
||
785 | and dword [pages_tab+edx*4], 0 |
||
786 | add eax, ebx |
||
787 | and eax, not 4095 |
||
788 | or eax, FREE_BLOCK |
||
789 | mov [pages_tab+esi*4], eax |
||
790 | jmp @B |
||
791 | .exit: |
||
792 | xor eax, eax |
||
793 | inc eax |
||
794 | ret |
||
795 | .err: |
||
796 | xor eax, eax |
||
797 | ret |
||
798 | endp |
||
799 | |||
800 | |||
801 | proc alloc_dll |
||
802 | pushf |
||
803 | cli |
||
804 | bsf eax, [dll_map] |
||
805 | jnz .find |
||
806 | popf |
||
807 | xor eax, eax |
||
808 | ret |
||
809 | .find: |
||
810 | btr [dll_map], eax |
||
811 | popf |
||
812 | shl eax, 5 |
||
813 | add eax, dll_tab |
||
814 | ret |
||
815 | endp |
||
816 | |||
817 | |||
818 | proc alloc_service |
||
819 | pushf |
||
820 | cli |
||
821 | bsf eax, [srv_map] |
||
822 | jnz .find |
||
823 | popf |
||
824 | xor eax, eax |
||
825 | ret |
||
826 | .find: |
||
214 | serge | 827 | btr [srv_map], eax |
828 | popf |
||
164 | serge | 829 | shl eax,0x02 |
214 | serge | 830 | lea eax,[srv_tab+eax+eax*8] ;srv_tab+eax*36 |
831 | ret |
||
164 | serge | 832 | endp |
833 |