Rev 465 | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
425 | victor | 1 | $Revision: 465 $ |
431 | serge | 2 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
3 | ;; ;; |
||
4 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
||
5 | ;; Distributed under terms of the GNU General Public License ;; |
||
6 | ;; ;; |
||
7 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
8 | |||
276 | serge | 9 | ; Small heap based on malloc/free/realloc written by Doug Lea |
10 | ; Version 2.8.3 Thu Sep 22 11:16:15 2005 Doug Lea (dl at gee) |
||
11 | ; Source ftp://gee.cs.oswego.edu/pub/misc/malloc.c |
||
12 | ; License http://creativecommons.org/licenses/publicdomain. |
||
13 | |||
14 | |||
15 | ; eax= size |
||
16 | |||
17 | ; temp |
||
18 | ; esi= nb |
||
19 | ; ebx= idx |
||
20 | ; |
||
21 | malloc: |
||
22 | push esi |
||
23 | |||
24 | ; nb = ((size+7)&~7)+8; |
||
25 | |||
26 | mov esi, eax ;size |
||
27 | add esi, 7 |
||
28 | and esi, -8 |
||
29 | add esi, 8 |
||
30 | |||
31 | mov ebx, mst.mutex |
||
32 | call wait_mutex ;ebx |
||
33 | |||
34 | cmp esi, 256 |
||
35 | jae .large |
||
36 | |||
37 | mov ecx, esi |
||
326 | serge | 38 | shr ecx, 3 |
276 | serge | 39 | or eax, -1 |
40 | shl eax, cl |
||
41 | and eax, [mst.smallmap] |
||
42 | jz .small |
||
43 | |||
44 | push ebp |
||
45 | push edi |
||
46 | |||
47 | bsf eax, eax |
||
48 | mov ebx, eax |
||
49 | |||
50 | ; psize= idx<<3; |
||
51 | ; B = &ms.smallbins[idx]; |
||
52 | ; p = B->fd; |
||
53 | ; F = p->fd; |
||
54 | ; rsize= psize-nb; |
||
55 | |||
56 | lea ebp, [eax*8] ;ebp= psize |
||
57 | shl eax, 4 |
||
58 | lea edi, [mst.smallbins+eax] ;edi= B |
||
59 | mov edx, [edi+8] ;edx= p |
||
60 | mov eax, [edx+8] ;eax= F |
||
61 | mov ecx, ebp |
||
62 | sub ecx, esi ;ecx= rsize |
||
63 | |||
64 | ; if (B == F) |
||
65 | cmp edi, eax |
||
66 | jne @F |
||
67 | |||
68 | btr [mst.smallmap], ebx |
||
69 | @@: |
||
70 | |||
71 | ; B->fd = F; |
||
72 | ; F->bk = B; |
||
73 | ; if(rsize<16) |
||
74 | |||
75 | cmp ecx, 16 |
||
76 | mov [edi+8], eax |
||
77 | mov [eax+12], edi |
||
78 | jae .split |
||
79 | |||
80 | ; p->head = psize|PINUSE_BIT|CINUSE_BIT; |
||
81 | ; (p + psize)->head |= PINUSE_BIT; |
||
82 | |||
83 | lea eax, [edx+8] |
||
84 | or dword [edx+ebp+4], 1 |
||
85 | |||
86 | or ebp, 3 |
||
87 | mov [edx+4], ebp |
||
88 | |||
89 | pop edi |
||
90 | pop ebp |
||
91 | .done: |
||
92 | pop esi |
||
93 | mov [mst.mutex], 0 |
||
94 | ret |
||
95 | .split: |
||
96 | lea ebx, [edx+8] ;ebx=mem |
||
97 | |||
98 | ; r = chunk_plus_offset(p, nb); |
||
99 | ; p->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
100 | ; r->head = rsize|PINUSE_BIT; |
||
101 | |||
102 | lea eax, [edx+esi] ;eax= r |
||
103 | or esi, 3 |
||
104 | mov [edx+4], esi |
||
105 | |||
106 | mov edx, ecx |
||
107 | or edx, 1 |
||
108 | mov [eax+4], edx |
||
109 | |||
110 | ; (r + rsize)->prev_foot = rsize; |
||
111 | |||
112 | mov [eax+ecx], ecx |
||
113 | |||
114 | ; I = rsize>>3; |
||
115 | |||
116 | shr ecx, 3 |
||
117 | |||
118 | ; ms.smallmap |= 1<< I; |
||
119 | bts [mst.smallmap], ecx |
||
120 | |||
121 | ; B = &ms.smallbins[I]; |
||
122 | |||
123 | shl ecx, 4 |
||
124 | pop edi |
||
125 | pop ebp |
||
126 | add ecx, mst.smallbins ;ecx= B |
||
127 | |||
128 | mov edx, [ecx+8] ; F = B->fd; |
||
129 | mov [ecx+8], eax ; B->fd = r; |
||
130 | mov [edx+12], eax ; F->bk = r; |
||
131 | mov [eax+8], edx ; r->fd = F; |
||
132 | mov [eax+12], ecx ; r->bk = B; |
||
133 | mov eax, ebx |
||
134 | pop esi |
||
135 | ret |
||
136 | .small: |
||
137 | |||
138 | ; if (ms.treemap != 0 && (mem = malloc_small(nb)) != 0) |
||
139 | |||
140 | cmp [mst.treemap], 0 |
||
141 | je .from_top |
||
142 | mov eax, esi |
||
143 | call malloc_small |
||
144 | test eax, eax |
||
145 | jz .from_top |
||
146 | pop esi |
||
147 | and [mst.mutex], 0 |
||
148 | ret |
||
149 | .large: |
||
150 | |||
151 | ; if (ms.treemap != 0 && (mem = malloc_large(nb)) != 0) |
||
152 | |||
153 | cmp [mst.treemap], 0 |
||
154 | je .from_top |
||
155 | |||
156 | call malloc_large ;esi= nb |
||
157 | test eax, eax |
||
158 | jne .done |
||
159 | .from_top: |
||
160 | |||
161 | ; if (nb < ms.topsize) |
||
162 | |||
163 | mov eax, [mst.topsize] |
||
164 | cmp esi, eax |
||
165 | jae .fail |
||
166 | |||
167 | ; rsize = ms.topsize -= nb; |
||
168 | ; p = ms.top; |
||
169 | |||
170 | mov ecx, [mst.top] |
||
171 | sub eax, esi |
||
172 | mov [mst.topsize], eax |
||
173 | |||
174 | ; r = ms.top = chunk_plus_offset(p, nb); |
||
175 | ; r->head = rsize | PINUSE_BIT; |
||
176 | ; p->head = nb |PINUSE_BIT|CINUSE_BIT; |
||
177 | |||
178 | lea edx, [ecx+esi] |
||
179 | or eax, 1 |
||
180 | mov [mst.top], edx |
||
181 | or esi, 3 |
||
182 | mov [edx+4], eax |
||
183 | mov [ecx+4], esi |
||
184 | lea eax, [ecx+8] |
||
185 | pop esi |
||
186 | and [mst.mutex], 0 |
||
187 | ret |
||
188 | .fail: |
||
189 | xor eax, eax |
||
190 | pop esi |
||
191 | and [mst.mutex], 0 |
||
192 | ret |
||
193 | |||
194 | ; param |
||
195 | ; eax= mem |
||
196 | |||
197 | align 4 |
||
198 | free: |
||
199 | push edi |
||
200 | mov edi, eax |
||
201 | add edi, -8 |
||
202 | |||
203 | ; if(p->head & CINUSE_BIT) |
||
204 | |||
205 | test byte [edi+4], 2 |
||
206 | je .fail |
||
207 | |||
208 | mov ebx, mst.mutex |
||
209 | call wait_mutex ;ebx |
||
210 | |||
211 | ; psize = p->head & (~3); |
||
212 | |||
213 | mov eax, [edi+4] |
||
214 | push esi |
||
215 | mov esi, eax |
||
216 | and esi, -4 |
||
217 | |||
218 | ; next = chunk_plus_offset(p, psize); |
||
219 | ; if(!(p->head & PINUSE_BIT)) |
||
220 | |||
221 | test al, 1 |
||
222 | lea ebx, [esi+edi] |
||
223 | jne .next |
||
224 | |||
225 | ; prevsize = p->prev_foot; |
||
226 | ; prev=p - prevsize; |
||
227 | ; psize += prevsize; |
||
228 | ; p = prev; |
||
229 | |||
230 | mov ecx, [edi] ;ecx= prevsize |
||
231 | add esi, ecx ;esi= psize |
||
232 | sub edi, ecx ;edi= p |
||
233 | |||
234 | ; if (prevsize < 256) |
||
235 | |||
236 | cmp ecx, 256 |
||
237 | jae .unlink_large |
||
238 | |||
239 | mov eax, [edi+8] ;F = p->fd; |
||
240 | mov edx, [edi+12] ;B = p->bk; |
||
241 | |||
242 | ; if (F == B) |
||
243 | ; ms.smallmap &= ~(1<< I); |
||
244 | shr ecx, 3 |
||
245 | cmp eax, edx |
||
246 | jne @F |
||
247 | and [mst.smallmap], ecx |
||
248 | @@: |
||
249 | mov [eax+12], edx ;F->bk = B; |
||
250 | mov [edx+8], eax ;B->fd = F |
||
251 | jmp .next |
||
252 | .unlink_large: |
||
253 | mov edx, edi |
||
254 | call unlink_large_chunk |
||
255 | .next: |
||
256 | |||
257 | ; if(next->head & PINUSE_BIT) |
||
258 | |||
259 | mov eax, [ebx+4] |
||
260 | test al, 1 |
||
261 | jz .fail2 |
||
262 | |||
263 | ; if (! (next->head & CINUSE_BIT)) |
||
264 | |||
265 | test al, 2 |
||
266 | jnz .fix_next |
||
267 | |||
268 | ; if (next == ms.top) |
||
269 | |||
270 | cmp ebx, [mst.top] |
||
271 | jne @F |
||
272 | |||
273 | ; tsize = ms.topsize += psize; |
||
274 | |||
275 | mov eax, [mst.topsize] |
||
276 | add eax, esi |
||
277 | mov [mst.topsize], eax |
||
278 | |||
279 | ; ms.top = p; |
||
280 | ; p->head = tsize | PINUSE_BIT; |
||
281 | |||
282 | or eax, 1 |
||
283 | mov [mst.top], edi |
||
284 | mov [edi+4], eax |
||
285 | .fail2: |
||
286 | and [mst.mutex], 0 |
||
287 | pop esi |
||
288 | .fail: |
||
289 | pop edi |
||
290 | ret |
||
291 | @@: |
||
292 | |||
293 | ; nsize = next->head & ~INUSE_BITS; |
||
294 | |||
295 | and eax, -4 |
||
296 | add esi, eax ;psize += nsize; |
||
297 | |||
298 | ; if (nsize < 256) |
||
299 | |||
300 | cmp eax, 256 |
||
301 | jae .unl_large |
||
302 | |||
303 | mov edx, [ebx+8] ;F = next->fd |
||
304 | mov ebx, [ebx+12] ;B = next->bk |
||
305 | |||
306 | ; if (F == B) |
||
307 | |||
308 | cmp edx, ebx |
||
309 | jne @F |
||
310 | mov ecx, eax |
||
311 | shr ecx, 3 |
||
312 | btr [mst.smallmap], ecx |
||
313 | @@: |
||
314 | mov [edx+12], ebx ;F->bk = B |
||
315 | |||
316 | ; p->head = psize|PINUSE_BIT; |
||
317 | |||
318 | mov ecx, esi |
||
319 | mov [ebx+8], edx |
||
320 | or ecx, 1 |
||
321 | mov [edi+4], ecx |
||
322 | |||
323 | ; (p+psize)->prev_foot = psize; |
||
324 | |||
325 | mov [esi+edi], esi |
||
326 | |||
327 | ; insert_chunk(p,psize); |
||
328 | |||
329 | mov eax, esi |
||
330 | pop esi |
||
331 | mov ecx, edi |
||
332 | pop edi |
||
333 | jmp insert_chunk |
||
334 | .unl_large: |
||
335 | |||
336 | ; unlink_large_chunk((tchunkptr)next); |
||
337 | |||
338 | mov edx, ebx |
||
339 | call unlink_large_chunk |
||
340 | ; p->head = psize|PINUSE_BIT; |
||
341 | |||
342 | mov ecx, esi |
||
343 | or ecx, 1 |
||
344 | mov [edi+4], ecx |
||
345 | |||
346 | ; (p+psize)->prev_foot = psize; |
||
347 | |||
348 | mov [esi+edi], esi |
||
349 | |||
350 | ; insert_chunk(p,psize); |
||
351 | |||
352 | mov eax, esi |
||
353 | pop esi |
||
354 | mov ecx, edi |
||
355 | pop edi |
||
356 | jmp insert_chunk |
||
357 | .fix_next: |
||
358 | |||
359 | ; (p+psize)->prev_foot = psize; |
||
360 | ; next->head &= ~PINUSE_BIT; |
||
361 | ; p->head = psize|PINUSE_BIT; |
||
362 | |||
363 | and eax, -2 |
||
364 | mov edx, esi |
||
365 | mov [ebx+4], eax |
||
366 | or edx, 1 |
||
367 | mov [edi+4], edx |
||
368 | |||
369 | ; (p+psize)->prev_foot = psize; |
||
370 | |||
371 | mov [esi+edi], esi |
||
372 | ; insert_chunk(p,psize); |
||
373 | |||
374 | mov eax, esi |
||
375 | pop esi |
||
376 | mov ecx, edi |
||
377 | pop edi |
||
378 | jmp insert_chunk |
||
379 | |||
380 | ; param |
||
381 | ; ecx = chunk |
||
382 | ; eax = size |
||
383 | |||
384 | align 4 |
||
385 | insert_chunk: |
||
386 | |||
387 | cmp eax, 256 |
||
388 | push esi |
||
389 | mov esi, ecx |
||
390 | jae .large |
||
391 | |||
392 | ; I = S>>3; |
||
393 | ; ms.smallmap |= 1<< I; |
||
394 | |||
395 | shr eax, 3 |
||
396 | bts [mst.smallmap], eax |
||
397 | |||
398 | ; B = &ms.smallbins[I]; |
||
399 | |||
400 | shl eax, 4 |
||
401 | add eax, mst.smallbins |
||
402 | mov edx, [eax+8] ;F = B->fd |
||
403 | mov [eax+8], esi ;B->fd = P |
||
404 | mov [edx+12], esi ;F->bk = P |
||
405 | mov [esi+8], edx ;P->fd = F |
||
406 | mov [esi+12], eax ;P->bk = B |
||
407 | pop esi |
||
408 | and [mst.mutex], 0 |
||
409 | ret |
||
410 | .large: |
||
411 | mov ebx, eax |
||
412 | call insert_large_chunk |
||
413 | pop esi |
||
414 | and [mst.mutex], 0 |
||
415 | ret |
||
416 | |||
417 | align 4 |
||
418 | |||
419 | ; param |
||
420 | ; esi= chunk |
||
421 | ; ebx= size |
||
422 | |||
423 | align 4 |
||
424 | insert_large_chunk: |
||
425 | |||
426 | ; I = compute_tree_index(S); |
||
427 | |||
428 | mov edx, ebx |
||
429 | shr edx, 8 |
||
430 | bsr eax, edx |
||
431 | lea ecx, [eax+7] |
||
432 | mov edx, ebx |
||
433 | shr edx, cl |
||
434 | and edx, 1 |
||
435 | lea ecx, [edx+eax*2] |
||
436 | |||
437 | ; X->index = I; |
||
438 | mov dword [esi+28], ecx |
||
439 | |||
440 | ; X->child[0] = X->child[1] = 0; |
||
441 | and dword [esi+20], 0 |
||
442 | and dword [esi+16], 0 |
||
443 | |||
444 | ; H = &ms.treebins[I]; |
||
445 | |||
446 | mov eax, ecx |
||
447 | lea edx, [mst.treebins+eax*4] |
||
448 | |||
449 | ; if (!(ms.treemap & 1< |
||
450 | bt [mst.treemap], ecx |
||
451 | jc .tree |
||
452 | |||
453 | ; ms.treemap |= 1< |
||
454 | bts [mst.treemap], ecx |
||
455 | ; *H = X; |
||
456 | mov dword [edx], esi |
||
457 | jmp .done |
||
458 | .tree: |
||
459 | |||
460 | ; T = *H; |
||
461 | mov edx, [edx] |
||
462 | |||
463 | ; K = S << leftshift_for_tree_index(I); |
||
464 | mov eax, ecx |
||
465 | shr eax, 1 |
||
466 | sub ecx, 31 |
||
467 | mov edi, 37 |
||
468 | sub edi, eax |
||
469 | neg ecx |
||
470 | sbb ecx, ecx |
||
471 | and ecx, edi |
||
472 | mov eax, ebx |
||
473 | shl eax, cl ;eax= K |
||
474 | |||
475 | jmp .loop |
||
476 | |||
477 | .not_eq_size: |
||
478 | |||
479 | ; C = &(T->child[(K >> 31) & 1]); |
||
480 | mov ecx, eax |
||
481 | shr ecx, 31 |
||
482 | lea ecx, [edx+ecx*4+16] |
||
483 | |||
484 | ; K <<= 1; |
||
485 | ; if (*C != 0) |
||
486 | mov edi, [ecx] |
||
487 | add eax, eax |
||
488 | test edi, edi |
||
489 | jz .insert_child |
||
490 | |||
491 | ; T = *C; |
||
492 | mov edx, edi |
||
493 | .loop: |
||
494 | |||
495 | ; for (;;) |
||
496 | ; if ((T->head & ~INUSE_BITS) != S) |
||
497 | |||
498 | mov ecx, [edx+4] |
||
499 | and ecx, not 3 |
||
500 | cmp ecx, ebx |
||
501 | jne .not_eq_size |
||
502 | |||
503 | ; F = T->fd; |
||
504 | mov eax, [edx+8] |
||
505 | |||
506 | ; T->fd = F->bk = X; |
||
507 | mov [eax+12], esi |
||
508 | mov [edx+8], esi |
||
509 | |||
510 | ; X->fd = F; |
||
511 | ; X->bk = T; |
||
512 | ; X->parent = 0; |
||
513 | |||
514 | and dword [esi+24], 0 |
||
515 | mov [esi+8], eax |
||
516 | mov [esi+12], edx |
||
517 | ret |
||
518 | |||
519 | .insert_child: |
||
520 | |||
521 | ; *C = X; |
||
522 | mov [ecx], esi |
||
523 | .done: |
||
524 | |||
525 | ; X->parent = T; |
||
526 | mov [esi+24], edx |
||
527 | |||
528 | ; X->fd = X->bk = X; |
||
529 | mov [esi+12], esi |
||
530 | mov [esi+8], esi |
||
531 | ret |
||
532 | |||
533 | |||
534 | ; param |
||
535 | ; edx= chunk |
||
536 | |||
537 | align 4 |
||
538 | unlink_large_chunk: |
||
539 | |||
540 | mov eax, [edx+12] |
||
541 | cmp eax, edx |
||
542 | push edi |
||
543 | mov edi, [edx+24] |
||
544 | je @F |
||
545 | |||
546 | mov ecx, [edx+8] ;F = X->fd |
||
547 | mov [ecx+12], eax ;F->bk = R; |
||
548 | mov [eax+8], ecx ;R->fd = F |
||
549 | jmp .parent |
||
550 | @@: |
||
551 | mov eax, [edx+20] |
||
552 | test eax, eax |
||
553 | push esi |
||
554 | lea esi, [edx+20] |
||
555 | jne .loop |
||
556 | |||
557 | mov eax, [edx+16] |
||
558 | test eax, eax |
||
559 | lea esi, [edx+16] |
||
560 | je .l2 |
||
561 | .loop: |
||
562 | cmp dword [eax+20], 0 |
||
563 | lea ecx, [eax+20] |
||
564 | jne @F |
||
565 | |||
566 | cmp dword [eax+16], 0 |
||
567 | lea ecx, [eax+16] |
||
568 | je .l1 |
||
569 | @@: |
||
570 | mov eax, [ecx] |
||
571 | mov esi, ecx |
||
572 | jmp .loop |
||
573 | .l1: |
||
574 | mov dword [esi], 0 |
||
575 | .l2: |
||
576 | pop esi |
||
577 | .parent: |
||
578 | test edi, edi |
||
579 | je .done |
||
580 | |||
581 | mov ecx, [edx+28] |
||
582 | cmp edx, [mst.treebins+ecx*4] |
||
583 | lea ecx, [mst.treebins+ecx*4] |
||
584 | jne .l3 |
||
585 | |||
586 | test eax, eax |
||
587 | mov [ecx], eax |
||
588 | jne .l5 |
||
589 | |||
590 | mov ecx, [edx+28] |
||
591 | btr [mst.treemap], ecx |
||
592 | pop edi |
||
593 | ret |
||
594 | .l3: |
||
595 | cmp [edi+16], edx |
||
596 | jne @F |
||
597 | |||
598 | mov [edi+16], eax |
||
599 | jmp .l4 |
||
600 | @@: |
||
601 | mov [edi+20], eax |
||
602 | .l4: |
||
603 | test eax, eax |
||
604 | je .done |
||
605 | .l5: |
||
606 | mov [eax+24], edi |
||
607 | mov ecx, [edx+16] |
||
608 | test ecx, ecx |
||
609 | je .l6 |
||
610 | |||
611 | mov [eax+16], ecx |
||
612 | mov [ecx+24], eax |
||
613 | .l6: |
||
614 | mov edx, [edx+20] |
||
615 | test edx, edx |
||
616 | je .done |
||
617 | |||
618 | mov [eax+20], edx |
||
619 | mov [edx+24], eax |
||
620 | .done: |
||
621 | pop edi |
||
622 | ret |
||
623 | |||
624 | ; param |
||
625 | ; esi= nb |
||
626 | |||
627 | align 4 |
||
628 | malloc_small: |
||
629 | push ebp |
||
630 | mov ebp, esi |
||
631 | |||
632 | push edi |
||
633 | |||
634 | bsf eax,[mst.treemap] |
||
635 | mov ecx, [mst.treebins+eax*4] |
||
636 | |||
637 | ; rsize = (t->head & ~INUSE_BITS) - nb; |
||
638 | |||
639 | mov edi, [ecx+4] |
||
640 | and edi, -4 |
||
641 | sub edi, esi |
||
642 | .loop: |
||
643 | mov ebx, ecx |
||
644 | .loop_1: |
||
645 | |||
646 | ; while ((t = leftmost_child(t)) != 0) |
||
647 | |||
648 | mov eax, [ecx+16] |
||
649 | test eax, eax |
||
650 | jz @F |
||
651 | mov ecx, eax |
||
652 | jmp .l1 |
||
653 | @@: |
||
654 | mov ecx, [ecx+20] |
||
655 | .l1: |
||
656 | test ecx, ecx |
||
657 | jz .unlink |
||
658 | |||
659 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
660 | |||
661 | mov eax, [ecx+4] |
||
662 | and eax, -4 |
||
663 | sub eax, ebp |
||
664 | |||
665 | ; if (trem < rsize) |
||
666 | |||
667 | cmp eax, edi |
||
668 | jae .loop_1 |
||
669 | |||
670 | ; rsize = trem; |
||
671 | |||
672 | mov edi, eax |
||
673 | jmp .loop |
||
674 | .unlink: |
||
675 | |||
676 | |||
677 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
678 | ; unlink_large_chunk(v); |
||
679 | |||
680 | mov edx, ebx |
||
681 | lea esi, [ebx+ebp] |
||
682 | call unlink_large_chunk |
||
683 | |||
684 | ; if (rsize < 16) |
||
685 | |||
686 | cmp edi, 16 |
||
687 | jae .split |
||
688 | |||
689 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
690 | |||
691 | lea ecx, [edi+ebp] |
||
692 | |||
693 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
694 | |||
695 | add edi, ebx |
||
696 | lea eax, [edi+ebp+4] |
||
697 | pop edi |
||
698 | or ecx, 3 |
||
699 | mov [ebx+4], ecx |
||
700 | or dword [eax], 1 |
||
701 | pop ebp |
||
702 | |||
703 | lea eax, [ebx+8] |
||
704 | ret |
||
705 | .split: |
||
706 | |||
707 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
708 | ; r->head = rsize|PINUSE_BIT; |
||
709 | ; (r+rsize)->prev_foot = rsize; |
||
710 | |||
711 | or ebp, 3 |
||
712 | mov edx, edi |
||
713 | or edx, 1 |
||
714 | |||
715 | cmp edi, 256 |
||
716 | mov [ebx+4], ebp |
||
717 | mov [esi+4], edx |
||
718 | mov [esi+edi], edi |
||
719 | jae .large |
||
720 | |||
721 | shr edi, 3 |
||
722 | bts [mst.smallmap], edi |
||
723 | |||
724 | mov eax, edi |
||
725 | shl eax, 4 |
||
726 | add eax, mst.smallbins |
||
727 | |||
728 | mov edx, [eax+8] |
||
729 | mov [eax+8], esi |
||
730 | mov [edx+12], esi |
||
731 | pop edi |
||
732 | mov [esi+12], eax |
||
733 | mov [esi+8], edx |
||
734 | pop ebp |
||
735 | lea eax, [ebx+8] |
||
736 | ret |
||
737 | .large: |
||
738 | lea eax, [ebx+8] |
||
739 | push eax |
||
740 | mov ebx, edi |
||
741 | call insert_large_chunk |
||
742 | pop eax |
||
743 | pop edi |
||
744 | pop ebp |
||
745 | ret |
||
746 | |||
747 | |||
748 | ; param |
||
749 | ; esi= nb |
||
750 | |||
751 | align 4 |
||
752 | malloc_large: |
||
753 | .idx equ esp+4 |
||
754 | .rst equ esp |
||
755 | |||
756 | push ebp |
||
757 | push edi |
||
758 | sub esp, 8 |
||
759 | ; v = 0; |
||
760 | ; rsize = -nb; |
||
761 | |||
762 | mov edi, esi |
||
763 | mov ebx, esi |
||
764 | xor ebp, ebp |
||
765 | neg edi |
||
766 | |||
767 | ; idx = compute_tree_index(nb); |
||
768 | |||
769 | mov edx, esi |
||
770 | shr edx, 8 |
||
771 | bsr eax, edx |
||
772 | lea ecx, [eax+7] |
||
773 | shr esi, cl |
||
774 | and esi, 1 |
||
775 | lea ecx, [esi+eax*2] |
||
776 | mov [.idx], ecx |
||
777 | |||
778 | ; if ((t = ms.treebins[idx]) != 0) |
||
779 | |||
780 | mov eax, [mst.treebins+ecx*4] |
||
781 | test eax, eax |
||
782 | jz .l3 |
||
783 | |||
784 | ; sizebits = nb << leftshift_for_tree_index(idx); |
||
785 | |||
786 | cmp ecx, 31 |
||
787 | jne @F |
||
788 | xor ecx, ecx |
||
789 | jmp .l1 |
||
790 | @@: |
||
791 | mov edx, ecx |
||
792 | shr edx, 1 |
||
793 | mov ecx, 37 |
||
794 | sub ecx, edx |
||
795 | .l1: |
||
796 | mov edx, ebx |
||
797 | shl edx, cl |
||
798 | |||
799 | ; rst = 0; |
||
800 | mov [.rst], ebp |
||
801 | .loop: |
||
802 | |||
803 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
804 | |||
805 | mov ecx, [eax+4] |
||
806 | and ecx, -4 |
||
807 | sub ecx, ebx |
||
808 | |||
809 | ; if (trem < rsize) |
||
810 | |||
811 | cmp ecx, edi |
||
812 | jae @F |
||
813 | ; v = t; |
||
814 | ; if ((rsize = trem) == 0) |
||
815 | |||
816 | test ecx, ecx |
||
817 | mov ebp, eax |
||
818 | mov edi, ecx |
||
819 | je .l2 |
||
820 | @@: |
||
821 | |||
822 | ; rt = t->child[1]; |
||
823 | |||
824 | mov ecx, [eax+20] |
||
825 | |||
826 | ; t = t->child[(sizebits >> 31) & 1]; |
||
827 | |||
828 | mov esi, edx |
||
829 | shr esi, 31 |
||
830 | |||
831 | ; if (rt != 0 && rt != t) |
||
832 | |||
833 | test ecx, ecx |
||
834 | mov eax, [eax+esi*4+16] |
||
835 | jz @F |
||
836 | cmp ecx, eax |
||
837 | jz @F |
||
838 | |||
839 | ; rst = rt; |
||
840 | mov [.rst], ecx |
||
841 | @@: |
||
842 | ; if (t == 0) |
||
843 | |||
844 | test eax, eax |
||
845 | jz @F |
||
846 | |||
847 | ; sizebits <<= 1; |
||
848 | |||
849 | add edx, edx |
||
850 | jmp .loop |
||
851 | @@: |
||
852 | ; t = rst; |
||
853 | mov eax, [.rst] |
||
854 | .l2: |
||
855 | ; if (t == 0 && v == 0) |
||
856 | |||
857 | test eax, eax |
||
858 | jne .l4 |
||
859 | test ebp, ebp |
||
860 | jne .l7 |
||
861 | mov ecx, [.idx] |
||
862 | .l3: |
||
863 | |||
864 | ; leftbits = (-1< |
||
865 | ; if (leftbits != 0) |
||
866 | |||
867 | or edx, -1 |
||
868 | shl edx, cl |
||
869 | and edx, [mst.treemap] |
||
870 | jz @F |
||
871 | |||
872 | bsf eax, edx |
||
873 | ; t = ms.treebins[i]; |
||
874 | mov eax, [mst.treebins+eax*4] |
||
875 | @@: |
||
876 | |||
877 | ; while (t != 0) |
||
878 | test eax, eax |
||
879 | jz .l5 |
||
880 | .l4: |
||
881 | |||
882 | ; trem = (t->head & ~INUSE_BITS) - nb; |
||
883 | |||
884 | mov ecx, [eax+4] |
||
885 | and ecx, -4 |
||
886 | sub ecx, ebx |
||
887 | |||
888 | ; if (trem < rsize) |
||
889 | |||
890 | cmp ecx, edi |
||
891 | jae @F |
||
892 | ; rsize = trem; |
||
893 | |||
894 | mov edi, ecx |
||
895 | ; v = t; |
||
896 | mov ebp, eax |
||
897 | @@: |
||
898 | |||
899 | ; t = leftmost_child(t); |
||
900 | |||
901 | mov ecx, [eax+16] |
||
902 | test ecx, ecx |
||
903 | je @F |
||
904 | mov eax, ecx |
||
905 | jmp .l6 |
||
906 | @@: |
||
907 | mov eax, [eax+20] |
||
908 | .l6: |
||
909 | |||
910 | ; while (t != 0) |
||
911 | |||
912 | test eax, eax |
||
913 | jne .l4 |
||
914 | .l5: |
||
915 | |||
916 | ; if (v != 0) |
||
917 | |||
918 | test ebp, ebp |
||
919 | jz .done |
||
920 | .l7: |
||
921 | |||
922 | ; r = chunk_plus_offset((mchunkptr)v, nb); |
||
923 | ; unlink_large_chunk(v); |
||
924 | |||
925 | mov edx, ebp |
||
926 | lea esi, [ebx+ebp] |
||
927 | call unlink_large_chunk |
||
928 | |||
326 | serge | 929 | ; if (rsize < 16) |
276 | serge | 930 | |
326 | serge | 931 | cmp edi, 16 |
276 | serge | 932 | jae .large |
933 | |||
934 | ; v->head = (rsize + nb)|PINUSE_BIT|CINUSE_BIT; |
||
935 | |||
936 | lea ecx, [edi+ebx] |
||
937 | |||
938 | ; (v+rsize + nb)->head |= PINUSE_BIT; |
||
939 | |||
940 | add edi, ebp |
||
941 | lea eax, [edi+ebx+4] |
||
942 | or ecx, 3 |
||
943 | mov [ebp+4], ecx |
||
944 | or dword [eax], 1 |
||
945 | lea eax, [ebp+8] |
||
946 | add esp, 8 |
||
947 | pop edi |
||
948 | pop ebp |
||
949 | ret |
||
950 | .large: |
||
951 | |||
952 | ; v->head = nb|PINUSE_BIT|CINUSE_BIT; |
||
953 | ; r->head = rsize|PINUSE_BIT; |
||
954 | |||
955 | mov edx, edi |
||
956 | or ebx, 3 |
||
957 | mov [ebp+4], ebx |
||
958 | or edx, 1 |
||
959 | mov [esi+4], edx |
||
960 | |||
961 | ; (r+rsize)->prev_foot = rsize; |
||
962 | ; insert_large_chunk((tchunkptr)r, rsize); |
||
963 | |||
964 | mov [esi+edi], edi |
||
326 | serge | 965 | mov eax, edi |
966 | mov ecx, esi |
||
967 | call insert_chunk |
||
276 | serge | 968 | |
969 | lea eax, [ebp+8] |
||
970 | add esp, 8 |
||
971 | pop edi |
||
972 | pop ebp |
||
973 | ret |
||
974 | .done: |
||
975 | add esp, 8 |
||
976 | pop edi |
||
977 | pop ebp |
||
978 | xor eax, eax |
||
979 | ret |
||
980 | |||
981 | align 4 |
||
982 | init_malloc: |
||
983 | |||
984 | stdcall kernel_alloc, 0x20000 |
||
985 | |||
986 | mov [mst.top], eax |
||
987 | mov [mst.topsize], 128*1024 |
||
988 | mov dword [eax+4], (128*1024) or 1 |
||
989 | mov eax, mst.smallbins |
||
990 | @@: |
||
991 | mov [eax+8], eax |
||
992 | mov [eax+12], eax |
||
993 | add eax, 16 |
||
994 | cmp eax, mst.smallbins+512 |
||
465 | serge | 995 | jb @B |
276 | serge | 996 | |
997 | ret>> |
||
998 | |||
999 | |||
1000 | |||
1001 |