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