Rev 3681 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
||
5363 | yogev_ezra | 3 | ;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
||
6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
7 | |||
8 | $Revision: 5363 $ |
||
9 | |||
10 | |||
11 | ; Small heap based on malloc/free/realloc written by Doug Lea |
||
12 | ; Version 2.8.3 Thu Sep 22 11:16:15 2005 Doug Lea (dl at gee) |
||
13 | ; Source ftp://gee.cs.oswego.edu/pub/misc/malloc.c |
||
14 | ; License http://creativecommons.org/licenses/publicdomain. |
||
15 | |||
16 | |||
17 | ; eax= size |
||
18 | |||
19 | ; temp |
||
20 | ; esi= nb |
||
21 | ; ebx= idx |
||
22 | ; |
||
23 | align 4 |
||
24 | malloc: |
||
3681 | clevermous | 25 | push ebx esi |
2288 | clevermous | 26 | |
27 | ; nb = ((size+7)&~7)+8; |
||
28 | |||
29 | mov esi, eax ;size |
||
30 | add esi, 7 |
||
31 | and esi, -8 |
||
32 | add esi, 8 |
||
33 | |||
34 | mov ecx, mst.mutex |
||
35 | call mutex_lock |
||
36 | |||
37 | cmp esi, 256 |
||
38 | jae .large |
||
39 | |||
40 | mov ecx, esi |
||
41 | shr ecx, 3 |
||
42 | or eax, -1 |
||
43 | shl eax, cl |
||
44 | and eax, [mst.smallmap] |
||
45 | jz .small |
||
46 | |||
47 | push ebp |
||
48 | push edi |
||
49 | |||
50 | bsf eax, eax |
||
51 | mov ebx, eax |
||
52 | |||
53 | ; psize= idx<<3; |
||
54 | ; B = &ms.smallbins[idx]; |
||
55 | ; p = B->fd; |
||
56 | ; F = p->fd; |
||
57 | ; rsize= psize-nb; |
||
58 | |||
59 | lea ebp, [eax*8] ;ebp= psize |
||
60 | shl eax, 4 |
||
61 | lea edi, [mst.smallbins+eax] ;edi= B |
||
62 | mov edx, [edi+8] ;edx= p |
||
63 | mov eax, [edx+8] ;eax= F |
||
64 | mov ecx, ebp |
||
65 | sub ecx, esi ;ecx= rsize |
||
66 | |||
67 | ; if (B == F) |
||
68 | cmp edi, eax |
||
69 | jne @F |
||
70 | |||
71 | btr [mst.smallmap], ebx |
||
72 | @@: |
||
73 | |||
74 | ; B->fd = F; |
||
75 | ; F->bk = B; |
||
76 | ; if(rsize<16) |
||
77 | |||
78 | cmp ecx, 16 |
||
79 | mov [edi+8], eax |
||
80 | mov [eax+12], edi |
||
81 | jae .split |
||
82 | |||
83 | ; p->head = psize|PINUSE_BIT|CINUSE_BIT; |
||
84 | ; (p + psize)->head |= PINUSE_BIT; |
||
85 | |||
86 | lea eax, [edx+8] |
||
87 | or dword [edx+ebp+4], 1 |
||
88 | |||
89 | or ebp, 3 |
||
90 | mov [edx+4], ebp |
||
91 | |||
92 | pop edi |
||
93 | pop ebp |
||
94 | .done: |
||
95 | mov esi, eax |
||
96 | mov ecx, mst.mutex |
||
97 | call mutex_unlock |
||
98 | mov eax, esi |
||
3681 | clevermous | 99 | pop esi ebx |
2288 | clevermous | 100 | ret |
101 | |||
102 | .split: |
||
103 | lea ebx, [edx+8] ;ebx=mem |
||
104 | |||
105 | ; r = chunk_plus_offset(p, nb); |
||
106 | ; p->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
107 | ; r->head = rsize|PINUSE_BIT; |
||
108 | |||
109 | lea eax, [edx+esi] ;eax= r |
||
110 | or esi, 3 |
||
111 | mov [edx+4], esi |
||
112 | |||
113 | mov edx, ecx |
||
114 | or edx, 1 |
||
115 | mov [eax+4], edx |
||
116 | |||
117 | ; (r + rsize)->prev_foot = rsize; |
||
118 | |||
119 | mov [eax+ecx], ecx |
||
120 | |||
121 | ; I = rsize>>3; |
||
122 | |||
123 | shr ecx, 3 |
||
124 | |||
125 | ; ms.smallmap |= 1<< I; |
||
126 | bts [mst.smallmap], ecx |
||
127 | |||
128 | ; B = &ms.smallbins[I]; |
||
129 | |||
130 | shl ecx, 4 |
||
131 | pop edi |
||
132 | pop ebp |
||
133 | add ecx, mst.smallbins ;ecx= B |
||
134 | |||
135 | mov edx, [ecx+8] ; F = B->fd; |
||
136 | mov [ecx+8], eax ; B->fd = r; |
||
137 | mov [edx+12], eax ; F->bk = r; |
||
138 | mov [eax+8], edx ; r->fd = F; |
||
139 | mov [eax+12], ecx ; r->bk = B; |
||
140 | |||
141 | mov eax, ebx |
||
142 | jmp .done |
||
143 | |||
144 | .small: |
||
145 | |||
146 | ; if (ms.treemap != 0 && (mem = malloc_small(nb)) != 0) |
||
147 | ;;;;;;;;;;; start a change |
||
148 | mov eax, [mst.treemap] |
||
149 | test eax, eax |
||
150 | ;;;;;;;;;;; end the change |
||
151 | ; cmp [mst.treemap], 0 |
||
152 | jz .from_top |
||
153 | mov eax, esi |
||
154 | call malloc_small |
||
155 | test eax, eax |
||
156 | jz .from_top |
||
157 | jmp .done |
||
158 | |||
159 | .large: |
||
160 | |||
161 | ; if (ms.treemap != 0 && (mem = malloc_large(nb)) != 0) |
||
162 | |||
163 | cmp [mst.treemap], 0 |
||
164 | je .from_top |
||
165 | |||
166 | call malloc_large ;esi= nb |
||
167 | test eax, eax |
||
168 | jne .done |
||
169 | .from_top: |
||
170 | |||
171 | ; if (nb < ms.topsize) |
||
172 | |||
173 | mov eax, [mst.topsize] |
||
174 | cmp esi, eax |
||
175 | jae .fail |
||
176 | |||
177 | ; rsize = ms.topsize -= nb; |
||
178 | ; p = ms.top; |
||
179 | |||
180 | mov ecx, [mst.top] |
||
181 | sub eax, esi |
||
182 | mov [mst.topsize], eax |
||
183 | |||
184 | ; r = ms.top = chunk_plus_offset(p, nb); |
||
185 | ; r->head = rsize | PINUSE_BIT; |
||
186 | ; p->head = nb |PINUSE_BIT|CINUSE_BIT; |
||
187 | |||
188 | lea edx, [ecx+esi] |
||
189 | or eax, 1 |
||
190 | mov [mst.top], edx |
||
191 | or esi, 3 |
||
192 | mov [edx+4], eax |
||
193 | mov [ecx+4], esi |
||
194 | lea eax, [ecx+8] |
||
195 | jmp .done |
||
196 | |||
197 | .fail: |
||
198 | xor eax, eax |
||
199 | jmp .done |
||
200 | |||
201 | ; param |
||
202 | ; eax= mem |
||
203 | align 4 |
||
204 | free: |
||
205 | test eax, eax |
||
206 | jz .exit |
||
207 | |||
3681 | clevermous | 208 | push ebx edi |
2288 | clevermous | 209 | mov edi, eax |
210 | add edi, -8 |
||
211 | |||
212 | ; if(p->head & CINUSE_BIT) |
||
213 | |||
214 | test byte [edi+4], 2 |
||
215 | je .fail |
||
216 | |||
217 | mov ecx, mst.mutex |
||
218 | call mutex_lock |
||
219 | |||
220 | ; psize = p->head & (~3); |
||
221 | |||
222 | mov eax, [edi+4] |
||
223 | push esi |
||
224 | mov esi, eax |
||
225 | and esi, -4 |
||
226 | |||
227 | ; next = chunk_plus_offset(p, psize); |
||
228 | ; if(!(p->head & PINUSE_BIT)) |
||
229 | |||
230 | test al, 1 |
||
231 | lea ebx, [esi+edi] |
||
232 | jne .next |
||
233 | |||
234 | ; prevsize = p->prev_foot; |
||
235 | ; prev=p - prevsize; |
||
236 | ; psize += prevsize; |
||
237 | ; p = prev; |
||
238 | |||
239 | mov ecx, [edi] ;ecx= prevsize |
||
240 | add esi, ecx ;esi= psize |
||
241 | sub edi, ecx ;edi= p |
||
242 | |||
243 | ; if (prevsize < 256) |
||
244 | |||
245 | cmp ecx, 256 |
||
246 | jae .unlink_large |
||
247 | |||
248 | mov eax, [edi+8] ;F = p->fd; |
||
249 | mov edx, [edi+12] ;B = p->bk; |
||
250 | |||
251 | ; if (F == B) |
||
252 | ; ms.smallmap &= ~(1<< I); |
||
253 | shr ecx, 3 |
||
254 | cmp eax, edx |
||
255 | jne @F |
||
256 | btr [mst.smallmap], ecx |
||
257 | @@: |
||
258 | mov [eax+12], edx ;F->bk = B; |
||
259 | mov [edx+8], eax ;B->fd = F |
||
260 | jmp .next |
||
261 | .unlink_large: |
||
262 | mov edx, edi |
||
263 | call unlink_large_chunk |
||
264 | .next: |
||
265 | |||
266 | ; if(next->head & PINUSE_BIT) |
||
267 | |||
268 | mov eax, [ebx+4] |
||
269 | test al, 1 |
||
270 | jz .fail2 |
||
271 | |||
272 | ; if (! (next->head & CINUSE_BIT)) |
||
273 | |||
274 | test al, 2 |
||
275 | jnz .fix_next |
||
276 | |||
277 | ; if (next == ms.top) |
||
278 | |||
279 | cmp ebx, [mst.top] |
||
280 | jne @F |
||
281 | |||
282 | ; tsize = ms.topsize += psize; |
||
283 | |||
284 | mov eax, [mst.topsize] |
||
285 | add eax, esi |
||
286 | mov [mst.topsize], eax |
||
287 | |||
288 | ; ms.top = p; |
||
289 | ; p->head = tsize | PINUSE_BIT; |
||
290 | |||
291 | or eax, 1 |
||
292 | mov [mst.top], edi |
||
293 | mov [edi+4], eax |
||
294 | .fail2: |
||
295 | mov esi, eax |
||
296 | mov ecx, mst.mutex |
||
297 | call mutex_unlock |
||
298 | mov eax, esi |
||
299 | pop esi |
||
300 | .fail: |
||
3681 | clevermous | 301 | pop edi ebx |
2288 | clevermous | 302 | .exit: |
303 | ret |
||
304 | |||
305 | @@: |
||
306 | |||
307 | ; nsize = next->head & ~INUSE_BITS; |
||
308 | |||
309 | and eax, -4 |
||
310 | add esi, eax ;psize += nsize; |
||
311 | |||
312 | ; if (nsize < 256) |
||
313 | |||
314 | cmp eax, 256 |
||
315 | jae .unl_large |
||
316 | |||
317 | mov edx, [ebx+8] ;F = next->fd |
||
318 | mov ebx, [ebx+12] ;B = next->bk |
||
319 | |||
320 | ; if (F == B) |
||
321 | |||
322 | cmp edx, ebx |
||
323 | jne @F |
||
324 | mov ecx, eax |
||
325 | shr ecx, 3 |
||
326 | btr [mst.smallmap], ecx |
||
327 | @@: |
||
328 | mov [edx+12], ebx ;F->bk = B |
||
329 | |||
330 | ; p->head = psize|PINUSE_BIT; |
||
331 | |||
332 | mov ecx, esi |
||
333 | mov [ebx+8], edx |
||
334 | or ecx, 1 |
||
335 | mov [edi+4], ecx |
||
336 | |||
337 | ; (p+psize)->prev_foot = psize; |
||
338 | |||
339 | mov [esi+edi], esi |
||
340 | |||
341 | ; insert_chunk(p,psize); |
||
342 | |||
343 | mov eax, esi |
||
344 | mov ecx, edi |
||
3126 | clevermous | 345 | call insert_chunk |
346 | jmp .fail2 |
||
2288 | clevermous | 347 | .unl_large: |
348 | |||
349 | ; unlink_large_chunk((tchunkptr)next); |
||
350 | |||
351 | mov edx, ebx |
||
352 | call unlink_large_chunk |
||
353 | ; p->head = psize|PINUSE_BIT; |
||
354 | |||
355 | mov ecx, esi |
||
356 | or ecx, 1 |
||
357 | mov [edi+4], ecx |
||
358 | |||
359 | ; (p+psize)->prev_foot = psize; |
||
360 | |||
361 | mov [esi+edi], esi |
||
362 | |||
363 | ; insert_chunk(p,psize); |
||
364 | |||
365 | mov eax, esi |
||
366 | mov ecx, edi |
||
3126 | clevermous | 367 | call insert_chunk |
368 | jmp .fail2 |
||
2288 | clevermous | 369 | .fix_next: |
370 | |||
371 | ; (p+psize)->prev_foot = psize; |
||
372 | ; next->head &= ~PINUSE_BIT; |
||
373 | ; p->head = psize|PINUSE_BIT; |
||
374 | |||
375 | and eax, -2 |
||
376 | mov edx, esi |
||
377 | mov [ebx+4], eax |
||
378 | or edx, 1 |
||
379 | mov [edi+4], edx |
||
380 | |||
381 | ; (p+psize)->prev_foot = psize; |
||
382 | |||
383 | mov [esi+edi], esi |
||
384 | ; insert_chunk(p,psize); |
||
385 | |||
386 | mov eax, esi |
||
387 | mov ecx, edi |
||
3126 | clevermous | 388 | call insert_chunk |
389 | jmp .fail2 |
||
2288 | clevermous | 390 | |
391 | ; param |
||
392 | ; ecx = chunk |
||
393 | ; eax = size |
||
394 | |||
395 | insert_chunk: |
||
396 | |||
397 | cmp eax, 256 |
||
398 | push esi |
||
399 | mov esi, ecx |
||
400 | jae .large |
||
401 | |||
402 | ; I = S>>3; |
||
403 | ; ms.smallmap |= 1<< I; |
||
404 | |||
405 | shr eax, 3 |
||
406 | bts [mst.smallmap], eax |
||
407 | |||
408 | ; B = &ms.smallbins[I]; |
||
409 | |||
410 | shl eax, 4 |
||
411 | add eax, mst.smallbins |
||
412 | mov edx, [eax+8] ;F = B->fd |
||
413 | mov [eax+8], esi ;B->fd = P |
||
414 | mov [edx+12], esi ;F->bk = P |
||
415 | mov [esi+8], edx ;P->fd = F |
||
416 | mov [esi+12], eax ;P->bk = B |
||
417 | pop esi |
||
418 | ret |
||
419 | .large: |
||
420 | mov ebx, eax |
||
421 | call insert_large_chunk |
||
422 | pop esi |
||
423 | ret |
||
424 | |||
425 | |||
426 | ; param |
||
427 | ; esi= chunk |
||
428 | ; ebx= size |
||
429 | |||
430 | insert_large_chunk: |
||
431 | |||
432 | ; I = compute_tree_index(S); |
||
433 | |||
434 | mov edx, ebx |
||
435 | shr edx, 8 |
||
436 | bsr eax, edx |
||
437 | lea ecx, [eax+7] |
||
438 | mov edx, ebx |
||
439 | shr edx, cl |
||
440 | and edx, 1 |
||
441 | lea ecx, [edx+eax*2] |
||
442 | |||
443 | ; X->index = I; |
||
444 | mov dword [esi+28], ecx |
||
445 | |||
446 | ; X->child[0] = X->child[1] = 0; |
||
447 | and dword [esi+20], 0 |
||
448 | and dword [esi+16], 0 |
||
449 | |||
450 | ; H = &ms.treebins[I]; |
||
451 | |||
452 | mov eax, ecx |
||
453 | lea edx, [mst.treebins+eax*4] |
||
454 | |||
455 | ; if (!(ms.treemap & 1< |
||
456 | bt [mst.treemap], ecx |
||
457 | jc .tree |
||
458 | |||
459 | ; ms.treemap |= 1< |
||
460 | bts [mst.treemap], ecx |
||
461 | ; *H = X; |
||
462 | mov dword [edx], esi |
||
463 | jmp .done |
||
464 | .tree: |
||
465 | |||
466 | ; T = *H; |
||
467 | mov edx, [edx] |
||
468 | |||
469 | ; K = S << leftshift_for_tree_index(I); |
||
470 | mov eax, ecx |
||
471 | shr eax, 1 |
||
472 | sub ecx, 31 |
||
473 | mov edi, 37 |
||
474 | sub edi, eax |
||
475 | neg ecx |
||
476 | sbb ecx, ecx |
||
477 | and ecx, edi |
||
478 | mov eax, ebx |
||
479 | shl eax, cl ;eax= K |
||
480 | |||
481 | jmp .loop |
||
482 | .not_eq_size: |
||
483 | |||
484 | ; C = &(T->child[(K >> 31) & 1]); |
||
485 | mov ecx, eax |
||
486 | shr ecx, 31 |
||
487 | lea ecx, [edx+ecx*4+16] |
||
488 | |||
489 | ; K <<= 1; |
||
490 | ; if (*C != 0) |
||
491 | mov edi, [ecx] |
||
492 | add eax, eax |
||
493 | test edi, edi |
||
494 | jz .insert_child |
||
495 | |||
496 | ; T = *C; |
||
497 | mov edx, edi |
||
498 | .loop: |
||
499 | |||
500 | ; for (;;) |
||
501 | ; if ((T->head & ~INUSE_BITS) != S) |
||
502 | |||
503 | mov ecx, [edx+4] |
||
504 | and ecx, not 3 |
||
505 | cmp ecx, ebx |
||
506 | jne .not_eq_size |
||
507 | |||
508 | ; F = T->fd; |
||
509 | mov eax, [edx+8] |
||
510 | |||
511 | ; T->fd = F->bk = X; |
||
512 | mov [eax+12], esi |
||
513 | mov [edx+8], esi |
||
514 | |||
515 | ; X->fd = F; |
||
516 | ; X->bk = T; |
||
517 | ; X->parent = 0; |
||
518 | |||
519 | and dword [esi+24], 0 |
||
520 | mov [esi+8], eax |
||
521 | mov [esi+12], edx |
||
522 | ret |
||
523 | .insert_child: |
||
524 | |||
525 | ; *C = X; |
||
526 | mov [ecx], esi |
||
527 | .done: |
||
528 | |||
529 | ; X->parent = T; |
||
530 | mov [esi+24], edx |
||
531 | |||
532 | ; X->fd = X->bk = X; |
||
533 | mov [esi+12], esi |
||
534 | mov [esi+8], esi |
||
535 | ret |
||
536 | |||
537 | |||
538 | ; param |
||
539 | ; edx= chunk |
||
540 | |||
541 | unlink_large_chunk: |
||
542 | |||
543 | mov eax, [edx+12] |
||
544 | cmp eax, edx |
||
545 | push edi |
||
546 | mov edi, [edx+24] |
||
547 | je @F |
||
548 | |||
549 | mov ecx, [edx+8] ;F = X->fd |
||
550 | mov [ecx+12], eax ;F->bk = R; |
||
551 | mov [eax+8], ecx ;R->fd = F |
||
552 | jmp .parent |
||
553 | @@: |
||
554 | mov eax, [edx+20] |
||
555 | test eax, eax |
||
556 | push esi |
||
557 | lea esi, [edx+20] |
||
558 | jne .loop |
||
559 | |||
560 | mov eax, [edx+16] |
||
561 | test eax, eax |
||
562 | lea esi, [edx+16] |
||
563 | je .l2 |
||
564 | .loop: |
||
565 | cmp dword [eax+20], 0 |
||
566 | lea ecx, [eax+20] |
||
567 | jne @F |
||
568 | |||
569 | cmp dword [eax+16], 0 |
||
570 | lea ecx, [eax+16] |
||
571 | je .l1 |
||
572 | @@: |
||
573 | mov eax, [ecx] |
||
574 | mov esi, ecx |
||
575 | jmp .loop |
||
576 | .l1: |
||
577 | mov dword [esi], 0 |
||
578 | .l2: |
||
579 | pop esi |
||
580 | .parent: |
||
581 | test edi, edi |
||
582 | je .done |
||
583 | |||
584 | mov ecx, [edx+28] |
||
585 | cmp edx, [mst.treebins+ecx*4] |
||
586 | lea ecx, [mst.treebins+ecx*4] |
||
587 | jne .l3 |
||
588 | |||
589 | test eax, eax |
||
590 | mov [ecx], eax |
||
591 | jne .l5 |
||
592 | |||
593 | mov ecx, [edx+28] |
||
594 | btr [mst.treemap], ecx |
||
595 | pop edi |
||
596 | ret |
||
597 | |||
598 | .l3: |
||
599 | cmp [edi+16], edx |
||
600 | jne @F |
||
601 | |||
602 | mov [edi+16], eax |
||
603 | jmp .l4 |
||
604 | |||
605 | @@: |
||
606 | mov [edi+20], eax |
||
607 | |||
608 | .l4: |
||
609 | test eax, eax |
||
610 | je .done |
||
611 | |||
612 | .l5: |
||
613 | mov [eax+24], edi |
||
614 | mov ecx, [edx+16] |
||
615 | test ecx, ecx |
||
616 | je .l6 |
||
617 | |||
618 | mov [eax+16], ecx |
||
619 | mov [ecx+24], eax |
||
620 | |||
621 | .l6: |
||
622 | mov edx, [edx+20] |
||
623 | test edx, edx |
||
624 | je .done |
||
625 | |||
626 | mov [eax+20], edx |
||
627 | mov [edx+24], eax |
||
628 | |||
629 | .done: |
||
630 | pop edi |
||
631 | ret |
||
632 | |||
633 | ; param |
||
634 | ; esi= nb |
||
635 | |||
636 | malloc_small: |
||
637 | push ebp |
||
638 | mov ebp, esi |
||
639 | |||
640 | push edi |
||
641 | |||
642 | bsf eax, [mst.treemap] |
||
643 | mov ecx, [mst.treebins+eax*4] |
||
644 | |||
645 | ; rsize = (t->head & ~INUSE_BITS) - nb; |
||
646 | |||
647 | mov edi, [ecx+4] |
||
648 | and edi, -4 |
||
649 | sub edi, esi |
||
650 | |||
651 | .loop: |
||
652 | mov ebx, ecx |
||
653 | |||
654 | .loop_1: |
||
655 | |||
656 | ; while ((t = leftmost_child(t)) != 0) |
||
657 | |||
658 | mov eax, [ecx+16] |
||
659 | test eax, eax |
||
660 | jz @F |
||
661 | mov ecx, eax |
||
662 | jmp .l1 |
||
663 | |||
664 | @@: |
||
665 | mov ecx, [ecx+20] |
||
666 | |||
667 | .l1: |
||
668 | test ecx, ecx |
||
669 | jz .unlink |
||
670 | |||
671 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
672 | |||
673 | mov eax, [ecx+4] |
||
674 | and eax, -4 |
||
675 | sub eax, ebp |
||
676 | |||
677 | ; if (trem < rsize) |
||
678 | |||
679 | cmp eax, edi |
||
680 | jae .loop_1 |
||
681 | |||
682 | ; rsize = trem; |
||
683 | |||
684 | mov edi, eax |
||
685 | jmp .loop |
||
686 | .unlink: |
||
687 | |||
688 | |||
689 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
690 | ; unlink_large_chunk(v); |
||
691 | |||
692 | mov edx, ebx |
||
693 | lea esi, [ebx+ebp] |
||
694 | call unlink_large_chunk |
||
695 | |||
696 | ; if (rsize < 16) |
||
697 | |||
698 | cmp edi, 16 |
||
699 | jae .split |
||
700 | |||
701 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
702 | |||
703 | lea ecx, [edi+ebp] |
||
704 | |||
705 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
706 | |||
707 | add edi, ebx |
||
708 | lea eax, [edi+ebp+4] |
||
709 | pop edi |
||
710 | or ecx, 3 |
||
711 | mov [ebx+4], ecx |
||
712 | or dword [eax], 1 |
||
713 | pop ebp |
||
714 | |||
715 | lea eax, [ebx+8] |
||
716 | ret |
||
717 | |||
718 | .split: |
||
719 | |||
720 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
721 | ; r->head = rsize|PINUSE_BIT; |
||
722 | ; (r+rsize)->prev_foot = rsize; |
||
723 | |||
724 | or ebp, 3 |
||
725 | mov edx, edi |
||
726 | or edx, 1 |
||
727 | |||
728 | cmp edi, 256 |
||
729 | mov [ebx+4], ebp |
||
730 | mov [esi+4], edx |
||
731 | mov [esi+edi], edi |
||
732 | jae .large |
||
733 | |||
734 | shr edi, 3 |
||
735 | bts [mst.smallmap], edi |
||
736 | |||
737 | mov eax, edi |
||
738 | shl eax, 4 |
||
739 | add eax, mst.smallbins |
||
740 | |||
741 | mov edx, [eax+8] |
||
742 | mov [eax+8], esi |
||
743 | mov [edx+12], esi |
||
744 | pop edi |
||
745 | mov [esi+12], eax |
||
746 | mov [esi+8], edx |
||
747 | pop ebp |
||
748 | lea eax, [ebx+8] |
||
749 | ret |
||
750 | |||
751 | .large: |
||
752 | lea eax, [ebx+8] |
||
753 | push eax |
||
754 | mov ebx, edi |
||
755 | call insert_large_chunk |
||
756 | pop eax |
||
757 | pop edi |
||
758 | pop ebp |
||
759 | ret |
||
760 | |||
761 | |||
762 | ; param |
||
763 | ; esi= nb |
||
764 | |||
765 | malloc_large: |
||
766 | .idx equ esp+4 |
||
767 | .rst equ esp |
||
768 | |||
769 | push ebp |
||
770 | push esi |
||
771 | push edi |
||
772 | sub esp, 8 |
||
773 | ; v = 0; |
||
774 | ; rsize = -nb; |
||
775 | |||
776 | mov edi, esi |
||
777 | mov ebx, esi |
||
778 | xor ebp, ebp |
||
779 | neg edi |
||
780 | |||
781 | ; idx = compute_tree_index(nb); |
||
782 | |||
783 | mov edx, esi |
||
784 | shr edx, 8 |
||
785 | bsr eax, edx |
||
786 | lea ecx, [eax+7] |
||
787 | shr esi, cl |
||
788 | and esi, 1 |
||
789 | lea ecx, [esi+eax*2] |
||
790 | mov [.idx], ecx |
||
791 | |||
792 | ; if ((t = ms.treebins[idx]) != 0) |
||
793 | |||
794 | mov eax, [mst.treebins+ecx*4] |
||
795 | test eax, eax |
||
796 | jz .l3 |
||
797 | |||
798 | ; sizebits = nb << leftshift_for_tree_index(idx); |
||
799 | |||
800 | cmp ecx, 31 |
||
801 | jne @F |
||
802 | xor ecx, ecx |
||
803 | jmp .l1 |
||
804 | |||
805 | @@: |
||
806 | mov edx, ecx |
||
807 | shr edx, 1 |
||
808 | mov ecx, 37 |
||
809 | sub ecx, edx |
||
810 | |||
811 | .l1: |
||
812 | mov edx, ebx |
||
813 | shl edx, cl |
||
814 | |||
815 | ; rst = 0; |
||
816 | mov [.rst], ebp |
||
817 | |||
818 | .loop: |
||
819 | |||
820 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
821 | |||
822 | mov ecx, [eax+4] |
||
823 | and ecx, -4 |
||
824 | sub ecx, ebx |
||
825 | |||
826 | ; if (trem < rsize) |
||
827 | |||
828 | cmp ecx, edi |
||
829 | jae @F |
||
830 | ; v = t; |
||
831 | ; if ((rsize = trem) == 0) |
||
832 | |||
833 | test ecx, ecx |
||
834 | mov ebp, eax |
||
835 | mov edi, ecx |
||
836 | je .l2 |
||
837 | |||
838 | @@: |
||
839 | |||
840 | ; rt = t->child[1]; |
||
841 | |||
842 | mov ecx, [eax+20] |
||
843 | |||
844 | ; t = t->child[(sizebits >> 31) & 1]; |
||
845 | |||
846 | mov esi, edx |
||
847 | shr esi, 31 |
||
848 | |||
849 | ; if (rt != 0 && rt != t) |
||
850 | |||
851 | test ecx, ecx |
||
852 | mov eax, [eax+esi*4+16] |
||
853 | jz @F |
||
854 | cmp ecx, eax |
||
855 | jz @F |
||
856 | |||
857 | ; rst = rt; |
||
858 | mov [.rst], ecx |
||
859 | |||
860 | @@: |
||
861 | ; if (t == 0) |
||
862 | |||
863 | test eax, eax |
||
864 | jz @F |
||
865 | |||
866 | ; sizebits <<= 1; |
||
867 | |||
868 | add edx, edx |
||
869 | jmp .loop |
||
870 | |||
871 | @@: |
||
872 | ; t = rst; |
||
873 | mov eax, [.rst] |
||
874 | |||
875 | .l2: |
||
876 | ; if (t == 0 && v == 0) |
||
877 | |||
878 | test eax, eax |
||
879 | jne .l4 |
||
880 | test ebp, ebp |
||
881 | jne .l7 |
||
882 | mov ecx, [.idx] |
||
883 | |||
884 | .l3: |
||
885 | |||
886 | ; leftbits = (-1< |
||
887 | ; if (leftbits != 0) |
||
888 | |||
889 | or edx, -1 |
||
890 | shl edx, cl |
||
891 | and edx, [mst.treemap] |
||
892 | jz @F |
||
893 | |||
894 | bsf eax, edx |
||
895 | ; t = ms.treebins[i]; |
||
896 | mov eax, [mst.treebins+eax*4] |
||
897 | |||
898 | @@: |
||
899 | |||
900 | ; while (t != 0) |
||
901 | test eax, eax |
||
902 | jz .l5 |
||
903 | |||
904 | .l4: |
||
905 | |||
906 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
907 | |||
908 | mov ecx, [eax+4] |
||
909 | and ecx, -4 |
||
910 | sub ecx, ebx |
||
911 | |||
912 | ; if (trem < rsize) |
||
913 | |||
914 | cmp ecx, edi |
||
915 | jae @F |
||
916 | ; rsize = trem; |
||
917 | |||
918 | mov edi, ecx |
||
919 | ; v = t; |
||
920 | mov ebp, eax |
||
921 | |||
922 | @@: |
||
923 | |||
924 | ; t = leftmost_child(t); |
||
925 | |||
926 | mov ecx, [eax+16] |
||
927 | test ecx, ecx |
||
928 | je @F |
||
929 | mov eax, ecx |
||
930 | jmp .l6 |
||
931 | |||
932 | @@: |
||
933 | mov eax, [eax+20] |
||
934 | |||
935 | .l6: |
||
936 | |||
937 | ; while (t != 0) |
||
938 | |||
939 | test eax, eax |
||
940 | jne .l4 |
||
941 | |||
942 | .l5: |
||
943 | |||
944 | ; if (v != 0) |
||
945 | |||
946 | test ebp, ebp |
||
947 | jz .done |
||
948 | |||
949 | .l7: |
||
950 | |||
951 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
952 | ; unlink_large_chunk(v); |
||
953 | |||
954 | mov edx, ebp |
||
955 | lea esi, [ebx+ebp] |
||
956 | call unlink_large_chunk |
||
957 | |||
958 | ; if (rsize < 16) |
||
959 | |||
960 | cmp edi, 16 |
||
961 | jae .large |
||
962 | |||
963 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
964 | |||
965 | lea ecx, [edi+ebx] |
||
966 | |||
967 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
968 | |||
969 | add edi, ebp |
||
970 | lea eax, [edi+ebx+4] |
||
971 | or ecx, 3 |
||
972 | mov [ebp+4], ecx |
||
973 | or dword [eax], 1 |
||
974 | lea eax, [ebp+8] |
||
975 | add esp, 8 |
||
976 | pop edi |
||
977 | pop esi |
||
978 | pop ebp |
||
979 | ret |
||
980 | |||
981 | .large: |
||
982 | |||
983 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
984 | ; r->head = rsize|PINUSE_BIT; |
||
985 | |||
986 | mov edx, edi |
||
987 | or ebx, 3 |
||
988 | mov [ebp+4], ebx |
||
989 | or edx, 1 |
||
990 | mov [esi+4], edx |
||
991 | |||
992 | ; (r+rsize)->prev_foot = rsize; |
||
993 | ; insert_large_chunk((tchunkptr)r, rsize); |
||
994 | |||
995 | mov [esi+edi], edi |
||
996 | mov eax, edi |
||
997 | mov ecx, esi |
||
998 | call insert_chunk |
||
999 | |||
1000 | lea eax, [ebp+8] |
||
1001 | add esp, 8 |
||
1002 | pop edi |
||
1003 | pop esi |
||
1004 | pop ebp |
||
1005 | ret |
||
1006 | |||
1007 | .done: |
||
1008 | add esp, 8 |
||
1009 | pop edi |
||
1010 | pop esi |
||
1011 | pop ebp |
||
1012 | xor eax, eax |
||
1013 | ret |
||
1014 | |||
1015 | init_malloc: |
||
1016 | |||
1017 | stdcall kernel_alloc, 0x40000 |
||
1018 | |||
1019 | mov [mst.top], eax |
||
1020 | mov [mst.topsize], 128*1024 |
||
1021 | mov dword [eax+4], (128*1024) or 1 |
||
1022 | mov eax, mst.smallbins |
||
1023 | |||
1024 | @@: |
||
1025 | mov [eax+8], eax |
||
1026 | mov [eax+12], eax |
||
1027 | add eax, 16 |
||
1028 | cmp eax, mst.smallbins+512 |
||
1029 | jb @B |
||
1030 | |||
1031 | mov ecx, mst.mutex |
||
1032 | call mutex_init |
||
1033 | |||
1034 | ret>> |
||
1035 |