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comparison uprogs/zombie.asm @ 0:c450faca55f4

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Init
author Tatsuki IHA <innparusu@cr.ie.u-ryukyu.ac.jp>
date Sun, 22 Oct 2017 18:25:39 +0900
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-1:000000000000 0:c450faca55f4
1
2 _zombie: file format elf32-littlearm
3
4
5 Disassembly of section .text:
6
7 00000000 <main>:
8 #include "stat.h"
9 #include "user.h"
10
11 int
12 main(void)
13 {
14 0: e92d4800 push {fp, lr}
15 4: e28db004 add fp, sp, #4
16 if(fork() > 0){
17 8: eb0000a8 bl 2b0 <fork>
18 c: e3500000 cmp r0, #0
19 10: da000005 ble 2c <main+0x2c>
20 sleep(5); // Let child exit before parent.
21 14: e3a00005 mov r0, #5
22 18: eb00019b bl 68c <sleep>
23 printf(2, "Parent exits!\n");
24 1c: e3a00002 mov r0, #2
25 20: e59f1014 ldr r1, [pc, #20] ; 3c <main+0x3c>
26 24: eb000201 bl 830 <printf>
27 exit();
28 28: eb0000ad bl 2e4 <exit>
29 }
30 printf(2, "Child exits!\n");
31 2c: e3a00002 mov r0, #2
32 30: e59f1008 ldr r1, [pc, #8] ; 40 <main+0x40>
33 34: eb0001fd bl 830 <printf>
34 exit();
35 38: eb0000a9 bl 2e4 <exit>
36 3c: 00000b18 .word 0x00000b18
37 40: 00000b28 .word 0x00000b28
38
39 00000044 <strcpy>:
40 #include "user.h"
41 #include "arm.h"
42
43 char*
44 strcpy(char *s, char *t)
45 {
46 44: e52db004 push {fp} ; (str fp, [sp, #-4]!)
47 char *os;
48
49 os = s;
50 while((*s++ = *t++) != 0)
51 48: e1a02000 mov r2, r0
52 #include "user.h"
53 #include "arm.h"
54
55 char*
56 strcpy(char *s, char *t)
57 {
58 4c: e28db000 add fp, sp, #0
59 char *os;
60
61 os = s;
62 while((*s++ = *t++) != 0)
63 50: e4d13001 ldrb r3, [r1], #1
64 54: e3530000 cmp r3, #0
65 58: e4c23001 strb r3, [r2], #1
66 5c: 1afffffb bne 50 <strcpy+0xc>
67 ;
68 return os;
69 }
70 60: e28bd000 add sp, fp, #0
71 64: e8bd0800 pop {fp}
72 68: e12fff1e bx lr
73
74 0000006c <strcmp>:
75
76 int
77 strcmp(const char *p, const char *q)
78 {
79 6c: e52db004 push {fp} ; (str fp, [sp, #-4]!)
80 70: e28db000 add fp, sp, #0
81 while(*p && *p == *q)
82 74: e5d03000 ldrb r3, [r0]
83 78: e5d12000 ldrb r2, [r1]
84 7c: e3530000 cmp r3, #0
85 80: 1a000004 bne 98 <strcmp+0x2c>
86 84: ea000005 b a0 <strcmp+0x34>
87 88: e5f03001 ldrb r3, [r0, #1]!
88 8c: e3530000 cmp r3, #0
89 90: 0a000006 beq b0 <strcmp+0x44>
90 94: e5f12001 ldrb r2, [r1, #1]!
91 98: e1530002 cmp r3, r2
92 9c: 0afffff9 beq 88 <strcmp+0x1c>
93 p++, q++;
94 return (uchar)*p - (uchar)*q;
95 }
96 a0: e0620003 rsb r0, r2, r3
97 a4: e28bd000 add sp, fp, #0
98 a8: e8bd0800 pop {fp}
99 ac: e12fff1e bx lr
100 }
101
102 int
103 strcmp(const char *p, const char *q)
104 {
105 while(*p && *p == *q)
106 b0: e5d12001 ldrb r2, [r1, #1]
107 b4: eafffff9 b a0 <strcmp+0x34>
108
109 000000b8 <strlen>:
110 return (uchar)*p - (uchar)*q;
111 }
112
113 uint
114 strlen(char *s)
115 {
116 b8: e52db004 push {fp} ; (str fp, [sp, #-4]!)
117 bc: e28db000 add fp, sp, #0
118 int n;
119
120 for(n = 0; s[n]; n++)
121 c0: e5d03000 ldrb r3, [r0]
122 c4: e3530000 cmp r3, #0
123 c8: 01a00003 moveq r0, r3
124 cc: 0a000006 beq ec <strlen+0x34>
125 d0: e1a02000 mov r2, r0
126 d4: e3a03000 mov r3, #0
127 d8: e5f21001 ldrb r1, [r2, #1]!
128 dc: e2833001 add r3, r3, #1
129 e0: e1a00003 mov r0, r3
130 e4: e3510000 cmp r1, #0
131 e8: 1afffffa bne d8 <strlen+0x20>
132 ;
133 return n;
134 }
135 ec: e28bd000 add sp, fp, #0
136 f0: e8bd0800 pop {fp}
137 f4: e12fff1e bx lr
138
139 000000f8 <memset>:
140 memset(void *dst, int c, uint n)
141 {
142 char *p=dst;
143 u32 rc=n;
144
145 while (rc-- > 0) *p++ = c;
146 f8: e3520000 cmp r2, #0
147 return n;
148 }
149
150 void*
151 memset(void *dst, int c, uint n)
152 {
153 fc: e52db004 push {fp} ; (str fp, [sp, #-4]!)
154 100: e28db000 add fp, sp, #0
155 char *p=dst;
156 u32 rc=n;
157
158 while (rc-- > 0) *p++ = c;
159 104: 0a000006 beq 124 <memset+0x2c>
160 108: e6ef1071 uxtb r1, r1
161 10c: e1a03002 mov r3, r2
162 }
163
164 void*
165 memset(void *dst, int c, uint n)
166 {
167 char *p=dst;
168 110: e1a0c000 mov ip, r0
169 u32 rc=n;
170
171 while (rc-- > 0) *p++ = c;
172 114: e2533001 subs r3, r3, #1
173 118: e4cc1001 strb r1, [ip], #1
174 11c: 1afffffc bne 114 <memset+0x1c>
175 120: e0800002 add r0, r0, r2
176 return (void *)p;
177 }
178 124: e28bd000 add sp, fp, #0
179 128: e8bd0800 pop {fp}
180 12c: e12fff1e bx lr
181
182 00000130 <strchr>:
183
184 char*
185 strchr(const char *s, char c)
186 {
187 130: e52db004 push {fp} ; (str fp, [sp, #-4]!)
188 134: e28db000 add fp, sp, #0
189 for(; *s; s++)
190 138: e5d03000 ldrb r3, [r0]
191 13c: e3530000 cmp r3, #0
192 140: 1a000004 bne 158 <strchr+0x28>
193 144: ea000008 b 16c <strchr+0x3c>
194 148: e5d03001 ldrb r3, [r0, #1]
195 14c: e2800001 add r0, r0, #1
196 150: e3530000 cmp r3, #0
197 154: 0a000004 beq 16c <strchr+0x3c>
198 if(*s == c)
199 158: e1530001 cmp r3, r1
200 15c: 1afffff9 bne 148 <strchr+0x18>
201 return (char*)s;
202 return 0;
203 }
204 160: e28bd000 add sp, fp, #0
205 164: e8bd0800 pop {fp}
206 168: e12fff1e bx lr
207 strchr(const char *s, char c)
208 {
209 for(; *s; s++)
210 if(*s == c)
211 return (char*)s;
212 return 0;
213 16c: e1a00003 mov r0, r3
214 170: eafffffa b 160 <strchr+0x30>
215
216 00000174 <gets>:
217 }
218
219 char*
220 gets(char *buf, int max)
221 {
222 174: e92d49f0 push {r4, r5, r6, r7, r8, fp, lr}
223 178: e28db018 add fp, sp, #24
224 17c: e24dd00c sub sp, sp, #12
225 180: e1a08000 mov r8, r0
226 184: e1a07001 mov r7, r1
227 int i, cc;
228 char c;
229
230 for(i=0; i+1 < max; ){
231 188: e1a06000 mov r6, r0
232 18c: e3a05000 mov r5, #0
233 190: ea000008 b 1b8 <gets+0x44>
234 cc = read(0, &c, 1);
235 194: eb000079 bl 380 <read>
236 if(cc < 1)
237 198: e3500000 cmp r0, #0
238 19c: da00000b ble 1d0 <gets+0x5c>
239 break;
240 buf[i++] = c;
241 1a0: e55b301d ldrb r3, [fp, #-29]
242 if(c == '\n' || c == '\r')
243 1a4: e1a05004 mov r5, r4
244 1a8: e353000a cmp r3, #10
245 1ac: 1353000d cmpne r3, #13
246
247 for(i=0; i+1 < max; ){
248 cc = read(0, &c, 1);
249 if(cc < 1)
250 break;
251 buf[i++] = c;
252 1b0: e4c63001 strb r3, [r6], #1
253 if(c == '\n' || c == '\r')
254 1b4: 0a00000a beq 1e4 <gets+0x70>
255 {
256 int i, cc;
257 char c;
258
259 for(i=0; i+1 < max; ){
260 cc = read(0, &c, 1);
261 1b8: e3a02001 mov r2, #1
262 gets(char *buf, int max)
263 {
264 int i, cc;
265 char c;
266
267 for(i=0; i+1 < max; ){
268 1bc: e0854002 add r4, r5, r2
269 1c0: e1540007 cmp r4, r7
270 cc = read(0, &c, 1);
271 1c4: e3a00000 mov r0, #0
272 1c8: e24b101d sub r1, fp, #29
273 gets(char *buf, int max)
274 {
275 int i, cc;
276 char c;
277
278 for(i=0; i+1 < max; ){
279 1cc: bafffff0 blt 194 <gets+0x20>
280 break;
281 buf[i++] = c;
282 if(c == '\n' || c == '\r')
283 break;
284 }
285 buf[i] = '\0';
286 1d0: e3a03000 mov r3, #0
287 1d4: e7c83005 strb r3, [r8, r5]
288 return buf;
289 }
290 1d8: e1a00008 mov r0, r8
291 1dc: e24bd018 sub sp, fp, #24
292 1e0: e8bd89f0 pop {r4, r5, r6, r7, r8, fp, pc}
293 gets(char *buf, int max)
294 {
295 int i, cc;
296 char c;
297
298 for(i=0; i+1 < max; ){
299 1e4: e1a05004 mov r5, r4
300 1e8: eafffff8 b 1d0 <gets+0x5c>
301
302 000001ec <stat>:
303 return buf;
304 }
305
306 int
307 stat(char *n, struct stat *st)
308 {
309 1ec: e92d4830 push {r4, r5, fp, lr}
310 1f0: e1a05001 mov r5, r1
311 1f4: e28db00c add fp, sp, #12
312 int fd;
313 int r;
314
315 fd = open(n, O_RDONLY);
316 1f8: e3a01000 mov r1, #0
317 1fc: eb0000a0 bl 484 <open>
318 if(fd < 0)
319 200: e2504000 subs r4, r0, #0
320 return -1;
321 204: b3e05000 mvnlt r5, #0
322 {
323 int fd;
324 int r;
325
326 fd = open(n, O_RDONLY);
327 if(fd < 0)
328 208: ba000004 blt 220 <stat+0x34>
329 return -1;
330 r = fstat(fd, st);
331 20c: e1a01005 mov r1, r5
332 210: eb0000c2 bl 520 <fstat>
333 214: e1a05000 mov r5, r0
334 close(fd);
335 218: e1a00004 mov r0, r4
336 21c: eb000071 bl 3e8 <close>
337 return r;
338 }
339 220: e1a00005 mov r0, r5
340 224: e8bd8830 pop {r4, r5, fp, pc}
341
342 00000228 <atoi>:
343
344 int
345 atoi(const char *s)
346 {
347 228: e52db004 push {fp} ; (str fp, [sp, #-4]!)
348 22c: e28db000 add fp, sp, #0
349 int n;
350
351 n = 0;
352 while('0' <= *s && *s <= '9')
353 230: e5d03000 ldrb r3, [r0]
354 234: e2432030 sub r2, r3, #48 ; 0x30
355 238: e6ef2072 uxtb r2, r2
356 23c: e3520009 cmp r2, #9
357 int
358 atoi(const char *s)
359 {
360 int n;
361
362 n = 0;
363 240: 83a00000 movhi r0, #0
364 while('0' <= *s && *s <= '9')
365 244: 8a000009 bhi 270 <atoi+0x48>
366 248: e1a02000 mov r2, r0
367 int
368 atoi(const char *s)
369 {
370 int n;
371
372 n = 0;
373 24c: e3a00000 mov r0, #0
374 while('0' <= *s && *s <= '9')
375 n = n*10 + *s++ - '0';
376 250: e0800100 add r0, r0, r0, lsl #2
377 254: e0830080 add r0, r3, r0, lsl #1
378 atoi(const char *s)
379 {
380 int n;
381
382 n = 0;
383 while('0' <= *s && *s <= '9')
384 258: e5f23001 ldrb r3, [r2, #1]!
385 n = n*10 + *s++ - '0';
386 25c: e2400030 sub r0, r0, #48 ; 0x30
387 atoi(const char *s)
388 {
389 int n;
390
391 n = 0;
392 while('0' <= *s && *s <= '9')
393 260: e2431030 sub r1, r3, #48 ; 0x30
394 264: e6ef1071 uxtb r1, r1
395 268: e3510009 cmp r1, #9
396 26c: 9afffff7 bls 250 <atoi+0x28>
397 n = n*10 + *s++ - '0';
398 return n;
399 }
400 270: e28bd000 add sp, fp, #0
401 274: e8bd0800 pop {fp}
402 278: e12fff1e bx lr
403
404 0000027c <memmove>:
405 {
406 char *dst, *src;
407
408 dst = vdst;
409 src = vsrc;
410 while(n-- > 0)
411 27c: e3520000 cmp r2, #0
412 return n;
413 }
414
415 void*
416 memmove(void *vdst, void *vsrc, int n)
417 {
418 280: e52db004 push {fp} ; (str fp, [sp, #-4]!)
419 284: e28db000 add fp, sp, #0
420 char *dst, *src;
421
422 dst = vdst;
423 src = vsrc;
424 while(n-- > 0)
425 288: da000005 ble 2a4 <memmove+0x28>
426 n = n*10 + *s++ - '0';
427 return n;
428 }
429
430 void*
431 memmove(void *vdst, void *vsrc, int n)
432 28c: e0802002 add r2, r0, r2
433 {
434 char *dst, *src;
435
436 dst = vdst;
437 290: e1a03000 mov r3, r0
438 src = vsrc;
439 while(n-- > 0)
440 *dst++ = *src++;
441 294: e4d1c001 ldrb ip, [r1], #1
442 298: e4c3c001 strb ip, [r3], #1
443 {
444 char *dst, *src;
445
446 dst = vdst;
447 src = vsrc;
448 while(n-- > 0)
449 29c: e1530002 cmp r3, r2
450 2a0: 1afffffb bne 294 <memmove+0x18>
451 *dst++ = *src++;
452 return vdst;
453 }
454 2a4: e28bd000 add sp, fp, #0
455 2a8: e8bd0800 pop {fp}
456 2ac: e12fff1e bx lr
457
458 000002b0 <fork>:
459 2b0: e92d4000 push {lr}
460 2b4: e92d0008 push {r3}
461 2b8: e92d0004 push {r2}
462 2bc: e92d0002 push {r1}
463 2c0: e92d0001 push {r0}
464 2c4: e3a00001 mov r0, #1
465 2c8: ef000040 svc 0x00000040
466 2cc: e8bd0002 pop {r1}
467 2d0: e8bd0002 pop {r1}
468 2d4: e8bd0004 pop {r2}
469 2d8: e8bd0008 pop {r3}
470 2dc: e8bd4000 pop {lr}
471 2e0: e12fff1e bx lr
472
473 000002e4 <exit>:
474 2e4: e92d4000 push {lr}
475 2e8: e92d0008 push {r3}
476 2ec: e92d0004 push {r2}
477 2f0: e92d0002 push {r1}
478 2f4: e92d0001 push {r0}
479 2f8: e3a00002 mov r0, #2
480 2fc: ef000040 svc 0x00000040
481 300: e8bd0002 pop {r1}
482 304: e8bd0002 pop {r1}
483 308: e8bd0004 pop {r2}
484 30c: e8bd0008 pop {r3}
485 310: e8bd4000 pop {lr}
486 314: e12fff1e bx lr
487
488 00000318 <wait>:
489 318: e92d4000 push {lr}
490 31c: e92d0008 push {r3}
491 320: e92d0004 push {r2}
492 324: e92d0002 push {r1}
493 328: e92d0001 push {r0}
494 32c: e3a00003 mov r0, #3
495 330: ef000040 svc 0x00000040
496 334: e8bd0002 pop {r1}
497 338: e8bd0002 pop {r1}
498 33c: e8bd0004 pop {r2}
499 340: e8bd0008 pop {r3}
500 344: e8bd4000 pop {lr}
501 348: e12fff1e bx lr
502
503 0000034c <pipe>:
504 34c: e92d4000 push {lr}
505 350: e92d0008 push {r3}
506 354: e92d0004 push {r2}
507 358: e92d0002 push {r1}
508 35c: e92d0001 push {r0}
509 360: e3a00004 mov r0, #4
510 364: ef000040 svc 0x00000040
511 368: e8bd0002 pop {r1}
512 36c: e8bd0002 pop {r1}
513 370: e8bd0004 pop {r2}
514 374: e8bd0008 pop {r3}
515 378: e8bd4000 pop {lr}
516 37c: e12fff1e bx lr
517
518 00000380 <read>:
519 380: e92d4000 push {lr}
520 384: e92d0008 push {r3}
521 388: e92d0004 push {r2}
522 38c: e92d0002 push {r1}
523 390: e92d0001 push {r0}
524 394: e3a00005 mov r0, #5
525 398: ef000040 svc 0x00000040
526 39c: e8bd0002 pop {r1}
527 3a0: e8bd0002 pop {r1}
528 3a4: e8bd0004 pop {r2}
529 3a8: e8bd0008 pop {r3}
530 3ac: e8bd4000 pop {lr}
531 3b0: e12fff1e bx lr
532
533 000003b4 <write>:
534 3b4: e92d4000 push {lr}
535 3b8: e92d0008 push {r3}
536 3bc: e92d0004 push {r2}
537 3c0: e92d0002 push {r1}
538 3c4: e92d0001 push {r0}
539 3c8: e3a00010 mov r0, #16
540 3cc: ef000040 svc 0x00000040
541 3d0: e8bd0002 pop {r1}
542 3d4: e8bd0002 pop {r1}
543 3d8: e8bd0004 pop {r2}
544 3dc: e8bd0008 pop {r3}
545 3e0: e8bd4000 pop {lr}
546 3e4: e12fff1e bx lr
547
548 000003e8 <close>:
549 3e8: e92d4000 push {lr}
550 3ec: e92d0008 push {r3}
551 3f0: e92d0004 push {r2}
552 3f4: e92d0002 push {r1}
553 3f8: e92d0001 push {r0}
554 3fc: e3a00015 mov r0, #21
555 400: ef000040 svc 0x00000040
556 404: e8bd0002 pop {r1}
557 408: e8bd0002 pop {r1}
558 40c: e8bd0004 pop {r2}
559 410: e8bd0008 pop {r3}
560 414: e8bd4000 pop {lr}
561 418: e12fff1e bx lr
562
563 0000041c <kill>:
564 41c: e92d4000 push {lr}
565 420: e92d0008 push {r3}
566 424: e92d0004 push {r2}
567 428: e92d0002 push {r1}
568 42c: e92d0001 push {r0}
569 430: e3a00006 mov r0, #6
570 434: ef000040 svc 0x00000040
571 438: e8bd0002 pop {r1}
572 43c: e8bd0002 pop {r1}
573 440: e8bd0004 pop {r2}
574 444: e8bd0008 pop {r3}
575 448: e8bd4000 pop {lr}
576 44c: e12fff1e bx lr
577
578 00000450 <exec>:
579 450: e92d4000 push {lr}
580 454: e92d0008 push {r3}
581 458: e92d0004 push {r2}
582 45c: e92d0002 push {r1}
583 460: e92d0001 push {r0}
584 464: e3a00007 mov r0, #7
585 468: ef000040 svc 0x00000040
586 46c: e8bd0002 pop {r1}
587 470: e8bd0002 pop {r1}
588 474: e8bd0004 pop {r2}
589 478: e8bd0008 pop {r3}
590 47c: e8bd4000 pop {lr}
591 480: e12fff1e bx lr
592
593 00000484 <open>:
594 484: e92d4000 push {lr}
595 488: e92d0008 push {r3}
596 48c: e92d0004 push {r2}
597 490: e92d0002 push {r1}
598 494: e92d0001 push {r0}
599 498: e3a0000f mov r0, #15
600 49c: ef000040 svc 0x00000040
601 4a0: e8bd0002 pop {r1}
602 4a4: e8bd0002 pop {r1}
603 4a8: e8bd0004 pop {r2}
604 4ac: e8bd0008 pop {r3}
605 4b0: e8bd4000 pop {lr}
606 4b4: e12fff1e bx lr
607
608 000004b8 <mknod>:
609 4b8: e92d4000 push {lr}
610 4bc: e92d0008 push {r3}
611 4c0: e92d0004 push {r2}
612 4c4: e92d0002 push {r1}
613 4c8: e92d0001 push {r0}
614 4cc: e3a00011 mov r0, #17
615 4d0: ef000040 svc 0x00000040
616 4d4: e8bd0002 pop {r1}
617 4d8: e8bd0002 pop {r1}
618 4dc: e8bd0004 pop {r2}
619 4e0: e8bd0008 pop {r3}
620 4e4: e8bd4000 pop {lr}
621 4e8: e12fff1e bx lr
622
623 000004ec <unlink>:
624 4ec: e92d4000 push {lr}
625 4f0: e92d0008 push {r3}
626 4f4: e92d0004 push {r2}
627 4f8: e92d0002 push {r1}
628 4fc: e92d0001 push {r0}
629 500: e3a00012 mov r0, #18
630 504: ef000040 svc 0x00000040
631 508: e8bd0002 pop {r1}
632 50c: e8bd0002 pop {r1}
633 510: e8bd0004 pop {r2}
634 514: e8bd0008 pop {r3}
635 518: e8bd4000 pop {lr}
636 51c: e12fff1e bx lr
637
638 00000520 <fstat>:
639 520: e92d4000 push {lr}
640 524: e92d0008 push {r3}
641 528: e92d0004 push {r2}
642 52c: e92d0002 push {r1}
643 530: e92d0001 push {r0}
644 534: e3a00008 mov r0, #8
645 538: ef000040 svc 0x00000040
646 53c: e8bd0002 pop {r1}
647 540: e8bd0002 pop {r1}
648 544: e8bd0004 pop {r2}
649 548: e8bd0008 pop {r3}
650 54c: e8bd4000 pop {lr}
651 550: e12fff1e bx lr
652
653 00000554 <link>:
654 554: e92d4000 push {lr}
655 558: e92d0008 push {r3}
656 55c: e92d0004 push {r2}
657 560: e92d0002 push {r1}
658 564: e92d0001 push {r0}
659 568: e3a00013 mov r0, #19
660 56c: ef000040 svc 0x00000040
661 570: e8bd0002 pop {r1}
662 574: e8bd0002 pop {r1}
663 578: e8bd0004 pop {r2}
664 57c: e8bd0008 pop {r3}
665 580: e8bd4000 pop {lr}
666 584: e12fff1e bx lr
667
668 00000588 <mkdir>:
669 588: e92d4000 push {lr}
670 58c: e92d0008 push {r3}
671 590: e92d0004 push {r2}
672 594: e92d0002 push {r1}
673 598: e92d0001 push {r0}
674 59c: e3a00014 mov r0, #20
675 5a0: ef000040 svc 0x00000040
676 5a4: e8bd0002 pop {r1}
677 5a8: e8bd0002 pop {r1}
678 5ac: e8bd0004 pop {r2}
679 5b0: e8bd0008 pop {r3}
680 5b4: e8bd4000 pop {lr}
681 5b8: e12fff1e bx lr
682
683 000005bc <chdir>:
684 5bc: e92d4000 push {lr}
685 5c0: e92d0008 push {r3}
686 5c4: e92d0004 push {r2}
687 5c8: e92d0002 push {r1}
688 5cc: e92d0001 push {r0}
689 5d0: e3a00009 mov r0, #9
690 5d4: ef000040 svc 0x00000040
691 5d8: e8bd0002 pop {r1}
692 5dc: e8bd0002 pop {r1}
693 5e0: e8bd0004 pop {r2}
694 5e4: e8bd0008 pop {r3}
695 5e8: e8bd4000 pop {lr}
696 5ec: e12fff1e bx lr
697
698 000005f0 <dup>:
699 5f0: e92d4000 push {lr}
700 5f4: e92d0008 push {r3}
701 5f8: e92d0004 push {r2}
702 5fc: e92d0002 push {r1}
703 600: e92d0001 push {r0}
704 604: e3a0000a mov r0, #10
705 608: ef000040 svc 0x00000040
706 60c: e8bd0002 pop {r1}
707 610: e8bd0002 pop {r1}
708 614: e8bd0004 pop {r2}
709 618: e8bd0008 pop {r3}
710 61c: e8bd4000 pop {lr}
711 620: e12fff1e bx lr
712
713 00000624 <getpid>:
714 624: e92d4000 push {lr}
715 628: e92d0008 push {r3}
716 62c: e92d0004 push {r2}
717 630: e92d0002 push {r1}
718 634: e92d0001 push {r0}
719 638: e3a0000b mov r0, #11
720 63c: ef000040 svc 0x00000040
721 640: e8bd0002 pop {r1}
722 644: e8bd0002 pop {r1}
723 648: e8bd0004 pop {r2}
724 64c: e8bd0008 pop {r3}
725 650: e8bd4000 pop {lr}
726 654: e12fff1e bx lr
727
728 00000658 <sbrk>:
729 658: e92d4000 push {lr}
730 65c: e92d0008 push {r3}
731 660: e92d0004 push {r2}
732 664: e92d0002 push {r1}
733 668: e92d0001 push {r0}
734 66c: e3a0000c mov r0, #12
735 670: ef000040 svc 0x00000040
736 674: e8bd0002 pop {r1}
737 678: e8bd0002 pop {r1}
738 67c: e8bd0004 pop {r2}
739 680: e8bd0008 pop {r3}
740 684: e8bd4000 pop {lr}
741 688: e12fff1e bx lr
742
743 0000068c <sleep>:
744 68c: e92d4000 push {lr}
745 690: e92d0008 push {r3}
746 694: e92d0004 push {r2}
747 698: e92d0002 push {r1}
748 69c: e92d0001 push {r0}
749 6a0: e3a0000d mov r0, #13
750 6a4: ef000040 svc 0x00000040
751 6a8: e8bd0002 pop {r1}
752 6ac: e8bd0002 pop {r1}
753 6b0: e8bd0004 pop {r2}
754 6b4: e8bd0008 pop {r3}
755 6b8: e8bd4000 pop {lr}
756 6bc: e12fff1e bx lr
757
758 000006c0 <uptime>:
759 6c0: e92d4000 push {lr}
760 6c4: e92d0008 push {r3}
761 6c8: e92d0004 push {r2}
762 6cc: e92d0002 push {r1}
763 6d0: e92d0001 push {r0}
764 6d4: e3a0000e mov r0, #14
765 6d8: ef000040 svc 0x00000040
766 6dc: e8bd0002 pop {r1}
767 6e0: e8bd0002 pop {r1}
768 6e4: e8bd0004 pop {r2}
769 6e8: e8bd0008 pop {r3}
770 6ec: e8bd4000 pop {lr}
771 6f0: e12fff1e bx lr
772
773 000006f4 <putc>:
774 #include "stat.h"
775 #include "user.h"
776
777 static void
778 putc(int fd, char c)
779 {
780 6f4: e92d4800 push {fp, lr}
781 6f8: e28db004 add fp, sp, #4
782 6fc: e24b3004 sub r3, fp, #4
783 700: e24dd008 sub sp, sp, #8
784 write(fd, &c, 1);
785 704: e3a02001 mov r2, #1
786 #include "stat.h"
787 #include "user.h"
788
789 static void
790 putc(int fd, char c)
791 {
792 708: e5631001 strb r1, [r3, #-1]!
793 write(fd, &c, 1);
794 70c: e1a01003 mov r1, r3
795 710: ebffff27 bl 3b4 <write>
796 }
797 714: e24bd004 sub sp, fp, #4
798 718: e8bd8800 pop {fp, pc}
799
800 0000071c <printint>:
801 return q;
802 }
803
804 static void
805 printint(int fd, int xx, int base, int sgn)
806 {
807 71c: e92d4ff0 push {r4, r5, r6, r7, r8, r9, sl, fp, lr}
808 720: e1a04000 mov r4, r0
809 char buf[16];
810 int i, neg;
811 uint x, y, b;
812
813 neg = 0;
814 if(sgn && xx < 0){
815 724: e1a00fa1 lsr r0, r1, #31
816 728: e3530000 cmp r3, #0
817 72c: 03a03000 moveq r3, #0
818 730: 12003001 andne r3, r0, #1
819 return q;
820 }
821
822 static void
823 printint(int fd, int xx, int base, int sgn)
824 {
825 734: e28db020 add fp, sp, #32
826 char buf[16];
827 int i, neg;
828 uint x, y, b;
829
830 neg = 0;
831 if(sgn && xx < 0){
832 738: e3530000 cmp r3, #0
833 return q;
834 }
835
836 static void
837 printint(int fd, int xx, int base, int sgn)
838 {
839 73c: e24dd014 sub sp, sp, #20
840 740: e59f909c ldr r9, [pc, #156] ; 7e4 <printint+0xc8>
841 uint x, y, b;
842
843 neg = 0;
844 if(sgn && xx < 0){
845 neg = 1;
846 x = -xx;
847 744: 12611000 rsbne r1, r1, #0
848 int i, neg;
849 uint x, y, b;
850
851 neg = 0;
852 if(sgn && xx < 0){
853 neg = 1;
854 748: 13a03001 movne r3, #1
855 } else {
856 x = xx;
857 }
858
859 b = base;
860 i = 0;
861 74c: e3a0a000 mov sl, #0
862 750: e24b6034 sub r6, fp, #52 ; 0x34
863 for(i=31;i>=0;i--){
864 r = r << 1;
865 r = r | ((n >> i) & 1);
866 if(r >= d) {
867 r = r - d;
868 q = q | (1 << i);
869 754: e3a08001 mov r8, #1
870 write(fd, &c, 1);
871 }
872
873 u32 div(u32 n, u32 d) // long division
874 {
875 u32 q=0, r=0;
876 758: e3a07000 mov r7, #0
877 int i;
878
879 for(i=31;i>=0;i--){
880 75c: e3a0001f mov r0, #31
881 write(fd, &c, 1);
882 }
883
884 u32 div(u32 n, u32 d) // long division
885 {
886 u32 q=0, r=0;
887 760: e1a0c007 mov ip, r7
888 int i;
889
890 for(i=31;i>=0;i--){
891 r = r << 1;
892 r = r | ((n >> i) & 1);
893 764: e1a0e031 lsr lr, r1, r0
894 768: e20ee001 and lr, lr, #1
895 76c: e18ec08c orr ip, lr, ip, lsl #1
896 if(r >= d) {
897 770: e152000c cmp r2, ip
898 r = r - d;
899 q = q | (1 << i);
900 774: 91877018 orrls r7, r7, r8, lsl r0
901
902 for(i=31;i>=0;i--){
903 r = r << 1;
904 r = r | ((n >> i) & 1);
905 if(r >= d) {
906 r = r - d;
907 778: 9062c00c rsbls ip, r2, ip
908 u32 div(u32 n, u32 d) // long division
909 {
910 u32 q=0, r=0;
911 int i;
912
913 for(i=31;i>=0;i--){
914 77c: e2500001 subs r0, r0, #1
915 780: 2afffff7 bcs 764 <printint+0x48>
916
917 b = base;
918 i = 0;
919 do{
920 y = div(x, b);
921 buf[i++] = digits[x - y * b];
922 784: e0000792 mul r0, r2, r7
923 }while((x = y) != 0);
924 788: e3570000 cmp r7, #0
925
926 b = base;
927 i = 0;
928 do{
929 y = div(x, b);
930 buf[i++] = digits[x - y * b];
931 78c: e0601001 rsb r1, r0, r1
932 790: e28a5001 add r5, sl, #1
933 794: e7d91001 ldrb r1, [r9, r1]
934 798: e7c6100a strb r1, [r6, sl]
935 }while((x = y) != 0);
936 79c: 11a01007 movne r1, r7
937
938 b = base;
939 i = 0;
940 do{
941 y = div(x, b);
942 buf[i++] = digits[x - y * b];
943 7a0: 11a0a005 movne sl, r5
944 7a4: 1affffeb bne 758 <printint+0x3c>
945 }while((x = y) != 0);
946 if(neg)
947 7a8: e3530000 cmp r3, #0
948 buf[i++] = '-';
949 7ac: 124b2024 subne r2, fp, #36 ; 0x24
950 7b0: 10823005 addne r3, r2, r5
951 7b4: 128a5002 addne r5, sl, #2
952
953 while(--i >= 0)
954 7b8: e2455001 sub r5, r5, #1
955 do{
956 y = div(x, b);
957 buf[i++] = digits[x - y * b];
958 }while((x = y) != 0);
959 if(neg)
960 buf[i++] = '-';
961 7bc: 13a0202d movne r2, #45 ; 0x2d
962 7c0: 15432010 strbne r2, [r3, #-16]
963
964 while(--i >= 0)
965 putc(fd, buf[i]);
966 7c4: e7d61005 ldrb r1, [r6, r5]
967 7c8: e1a00004 mov r0, r4
968 buf[i++] = digits[x - y * b];
969 }while((x = y) != 0);
970 if(neg)
971 buf[i++] = '-';
972
973 while(--i >= 0)
974 7cc: e2455001 sub r5, r5, #1
975 putc(fd, buf[i]);
976 7d0: ebffffc7 bl 6f4 <putc>
977 buf[i++] = digits[x - y * b];
978 }while((x = y) != 0);
979 if(neg)
980 buf[i++] = '-';
981
982 while(--i >= 0)
983 7d4: e3750001 cmn r5, #1
984 7d8: 1afffff9 bne 7c4 <printint+0xa8>
985 putc(fd, buf[i]);
986 }
987 7dc: e24bd020 sub sp, fp, #32
988 7e0: e8bd8ff0 pop {r4, r5, r6, r7, r8, r9, sl, fp, pc}
989 7e4: 00000b38 .word 0x00000b38
990
991 000007e8 <div>:
992 write(fd, &c, 1);
993 }
994
995 u32 div(u32 n, u32 d) // long division
996 {
997 u32 q=0, r=0;
998 7e8: e3a03000 mov r3, #0
999 {
1000 write(fd, &c, 1);
1001 }
1002
1003 u32 div(u32 n, u32 d) // long division
1004 {
1005 7ec: e92d0830 push {r4, r5, fp}
1006 7f0: e1a02000 mov r2, r0
1007 7f4: e28db008 add fp, sp, #8
1008 u32 q=0, r=0;
1009 int i;
1010
1011 for(i=31;i>=0;i--){
1012 7f8: e3a0c01f mov ip, #31
1013 write(fd, &c, 1);
1014 }
1015
1016 u32 div(u32 n, u32 d) // long division
1017 {
1018 u32 q=0, r=0;
1019 7fc: e1a00003 mov r0, r3
1020 for(i=31;i>=0;i--){
1021 r = r << 1;
1022 r = r | ((n >> i) & 1);
1023 if(r >= d) {
1024 r = r - d;
1025 q = q | (1 << i);
1026 800: e3a05001 mov r5, #1
1027 u32 q=0, r=0;
1028 int i;
1029
1030 for(i=31;i>=0;i--){
1031 r = r << 1;
1032 r = r | ((n >> i) & 1);
1033 804: e1a04c32 lsr r4, r2, ip
1034 808: e2044001 and r4, r4, #1
1035 80c: e1843083 orr r3, r4, r3, lsl #1
1036 if(r >= d) {
1037 810: e1530001 cmp r3, r1
1038 r = r - d;
1039 q = q | (1 << i);
1040 814: 21800c15 orrcs r0, r0, r5, lsl ip
1041
1042 for(i=31;i>=0;i--){
1043 r = r << 1;
1044 r = r | ((n >> i) & 1);
1045 if(r >= d) {
1046 r = r - d;
1047 818: 20613003 rsbcs r3, r1, r3
1048 u32 div(u32 n, u32 d) // long division
1049 {
1050 u32 q=0, r=0;
1051 int i;
1052
1053 for(i=31;i>=0;i--){
1054 81c: e25cc001 subs ip, ip, #1
1055 820: 2afffff7 bcs 804 <div+0x1c>
1056 r = r - d;
1057 q = q | (1 << i);
1058 }
1059 }
1060 return q;
1061 }
1062 824: e24bd008 sub sp, fp, #8
1063 828: e8bd0830 pop {r4, r5, fp}
1064 82c: e12fff1e bx lr
1065
1066 00000830 <printf>:
1067 }
1068
1069 // Print to the given fd. Only understands %d, %x, %p, %s.
1070 void
1071 printf(int fd, char *fmt, ...)
1072 {
1073 830: e92d000e push {r1, r2, r3}
1074 834: e92d4ff0 push {r4, r5, r6, r7, r8, r9, sl, fp, lr}
1075 838: e28db020 add fp, sp, #32
1076 83c: e1a05000 mov r5, r0
1077 int c, i, state;
1078 uint *ap;
1079
1080 state = 0;
1081 ap = (uint*)(void*)&fmt + 1;
1082 for(i = 0; fmt[i]; i++){
1083 840: e59b4004 ldr r4, [fp, #4]
1084 844: e5d48000 ldrb r8, [r4]
1085 848: e3580000 cmp r8, #0
1086 84c: 0a000027 beq 8f0 <printf+0xc0>
1087 ap++;
1088 } else if(c == 's'){
1089 s = (char*)*ap;
1090 ap++;
1091 if(s == 0)
1092 s = "(null)";
1093 850: e59f712c ldr r7, [pc, #300] ; 984 <printf+0x154>
1094 char *s;
1095 int c, i, state;
1096 uint *ap;
1097
1098 state = 0;
1099 ap = (uint*)(void*)&fmt + 1;
1100 854: e28b6008 add r6, fp, #8
1101 {
1102 char *s;
1103 int c, i, state;
1104 uint *ap;
1105
1106 state = 0;
1107 858: e3a0a000 mov sl, #0
1108 85c: ea000008 b 884 <printf+0x54>
1109 ap = (uint*)(void*)&fmt + 1;
1110 for(i = 0; fmt[i]; i++){
1111 c = fmt[i] & 0xff;
1112 if(state == 0){
1113 if(c == '%'){
1114 860: e3580025 cmp r8, #37 ; 0x25
1115 state = '%';
1116 864: 01a0a008 moveq sl, r8
1117 state = 0;
1118 ap = (uint*)(void*)&fmt + 1;
1119 for(i = 0; fmt[i]; i++){
1120 c = fmt[i] & 0xff;
1121 if(state == 0){
1122 if(c == '%'){
1123 868: 0a000002 beq 878 <printf+0x48>
1124 state = '%';
1125 } else {
1126 putc(fd, c);
1127 86c: e1a00005 mov r0, r5
1128 870: e1a01008 mov r1, r8
1129 874: ebffff9e bl 6f4 <putc>
1130 int c, i, state;
1131 uint *ap;
1132
1133 state = 0;
1134 ap = (uint*)(void*)&fmt + 1;
1135 for(i = 0; fmt[i]; i++){
1136 878: e5f48001 ldrb r8, [r4, #1]!
1137 87c: e3580000 cmp r8, #0
1138 880: 0a00001a beq 8f0 <printf+0xc0>
1139 c = fmt[i] & 0xff;
1140 if(state == 0){
1141 884: e35a0000 cmp sl, #0
1142 888: 0afffff4 beq 860 <printf+0x30>
1143 if(c == '%'){
1144 state = '%';
1145 } else {
1146 putc(fd, c);
1147 }
1148 } else if(state == '%'){
1149 88c: e35a0025 cmp sl, #37 ; 0x25
1150 890: 1afffff8 bne 878 <printf+0x48>
1151 if(c == 'd'){
1152 894: e3580064 cmp r8, #100 ; 0x64
1153 898: 0a00002c beq 950 <printf+0x120>
1154 printint(fd, *ap, 10, 1);
1155 ap++;
1156 } else if(c == 'x' || c == 'p'){
1157 89c: e3580078 cmp r8, #120 ; 0x78
1158 8a0: 13580070 cmpne r8, #112 ; 0x70
1159 8a4: 13a09000 movne r9, #0
1160 8a8: 03a09001 moveq r9, #1
1161 8ac: 0a000013 beq 900 <printf+0xd0>
1162 printint(fd, *ap, 16, 0);
1163 ap++;
1164 } else if(c == 's'){
1165 8b0: e3580073 cmp r8, #115 ; 0x73
1166 8b4: 0a000018 beq 91c <printf+0xec>
1167 s = "(null)";
1168 while(*s != 0){
1169 putc(fd, *s);
1170 s++;
1171 }
1172 } else if(c == 'c'){
1173 8b8: e3580063 cmp r8, #99 ; 0x63
1174 8bc: 0a00002a beq 96c <printf+0x13c>
1175 putc(fd, *ap);
1176 ap++;
1177 } else if(c == '%'){
1178 8c0: e3580025 cmp r8, #37 ; 0x25
1179 putc(fd, c);
1180 8c4: e1a0100a mov r1, sl
1181 8c8: e1a00005 mov r0, r5
1182 s++;
1183 }
1184 } else if(c == 'c'){
1185 putc(fd, *ap);
1186 ap++;
1187 } else if(c == '%'){
1188 8cc: 0a000002 beq 8dc <printf+0xac>
1189 putc(fd, c);
1190 } else {
1191 // Unknown % sequence. Print it to draw attention.
1192 putc(fd, '%');
1193 8d0: ebffff87 bl 6f4 <putc>
1194 putc(fd, c);
1195 8d4: e1a00005 mov r0, r5
1196 8d8: e1a01008 mov r1, r8
1197 8dc: ebffff84 bl 6f4 <putc>
1198 int c, i, state;
1199 uint *ap;
1200
1201 state = 0;
1202 ap = (uint*)(void*)&fmt + 1;
1203 for(i = 0; fmt[i]; i++){
1204 8e0: e5f48001 ldrb r8, [r4, #1]!
1205 } else {
1206 // Unknown % sequence. Print it to draw attention.
1207 putc(fd, '%');
1208 putc(fd, c);
1209 }
1210 state = 0;
1211 8e4: e1a0a009 mov sl, r9
1212 int c, i, state;
1213 uint *ap;
1214
1215 state = 0;
1216 ap = (uint*)(void*)&fmt + 1;
1217 for(i = 0; fmt[i]; i++){
1218 8e8: e3580000 cmp r8, #0
1219 8ec: 1affffe4 bne 884 <printf+0x54>
1220 putc(fd, c);
1221 }
1222 state = 0;
1223 }
1224 }
1225 }
1226 8f0: e24bd020 sub sp, fp, #32
1227 8f4: e8bd4ff0 pop {r4, r5, r6, r7, r8, r9, sl, fp, lr}
1228 8f8: e28dd00c add sp, sp, #12
1229 8fc: e12fff1e bx lr
1230 } else if(state == '%'){
1231 if(c == 'd'){
1232 printint(fd, *ap, 10, 1);
1233 ap++;
1234 } else if(c == 'x' || c == 'p'){
1235 printint(fd, *ap, 16, 0);
1236 900: e1a00005 mov r0, r5
1237 904: e4961004 ldr r1, [r6], #4
1238 908: e3a02010 mov r2, #16
1239 90c: e3a03000 mov r3, #0
1240 910: ebffff81 bl 71c <printint>
1241 } else {
1242 // Unknown % sequence. Print it to draw attention.
1243 putc(fd, '%');
1244 putc(fd, c);
1245 }
1246 state = 0;
1247 914: e3a0a000 mov sl, #0
1248 918: eaffffd6 b 878 <printf+0x48>
1249 ap++;
1250 } else if(c == 'x' || c == 'p'){
1251 printint(fd, *ap, 16, 0);
1252 ap++;
1253 } else if(c == 's'){
1254 s = (char*)*ap;
1255 91c: e4968004 ldr r8, [r6], #4
1256 ap++;
1257 if(s == 0)
1258 s = "(null)";
1259 920: e3580000 cmp r8, #0
1260 924: 01a08007 moveq r8, r7
1261 while(*s != 0){
1262 928: e5d81000 ldrb r1, [r8]
1263 92c: e3510000 cmp r1, #0
1264 930: 0a000004 beq 948 <printf+0x118>
1265 putc(fd, *s);
1266 934: e1a00005 mov r0, r5
1267 938: ebffff6d bl 6f4 <putc>
1268 } else if(c == 's'){
1269 s = (char*)*ap;
1270 ap++;
1271 if(s == 0)
1272 s = "(null)";
1273 while(*s != 0){
1274 93c: e5f81001 ldrb r1, [r8, #1]!
1275 940: e3510000 cmp r1, #0
1276 944: 1afffffa bne 934 <printf+0x104>
1277 } else {
1278 // Unknown % sequence. Print it to draw attention.
1279 putc(fd, '%');
1280 putc(fd, c);
1281 }
1282 state = 0;
1283 948: e1a0a001 mov sl, r1
1284 94c: eaffffc9 b 878 <printf+0x48>
1285 } else {
1286 putc(fd, c);
1287 }
1288 } else if(state == '%'){
1289 if(c == 'd'){
1290 printint(fd, *ap, 10, 1);
1291 950: e1a00005 mov r0, r5
1292 954: e4961004 ldr r1, [r6], #4
1293 958: e3a0200a mov r2, #10
1294 95c: e3a03001 mov r3, #1
1295 960: ebffff6d bl 71c <printint>
1296 } else {
1297 // Unknown % sequence. Print it to draw attention.
1298 putc(fd, '%');
1299 putc(fd, c);
1300 }
1301 state = 0;
1302 964: e3a0a000 mov sl, #0
1303 968: eaffffc2 b 878 <printf+0x48>
1304 while(*s != 0){
1305 putc(fd, *s);
1306 s++;
1307 }
1308 } else if(c == 'c'){
1309 putc(fd, *ap);
1310 96c: e4961004 ldr r1, [r6], #4
1311 970: e1a00005 mov r0, r5
1312 } else {
1313 // Unknown % sequence. Print it to draw attention.
1314 putc(fd, '%');
1315 putc(fd, c);
1316 }
1317 state = 0;
1318 974: e1a0a009 mov sl, r9
1319 while(*s != 0){
1320 putc(fd, *s);
1321 s++;
1322 }
1323 } else if(c == 'c'){
1324 putc(fd, *ap);
1325 978: e6ef1071 uxtb r1, r1
1326 97c: ebffff5c bl 6f4 <putc>
1327 980: eaffffbc b 878 <printf+0x48>
1328 984: 00000b4c .word 0x00000b4c
1329
1330 00000988 <free>:
1331 free(void *ap)
1332 {
1333 Header *bp, *p;
1334
1335 bp = (Header*)ap - 1;
1336 for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr)
1337 988: e59f3098 ldr r3, [pc, #152] ; a28 <free+0xa0>
1338 static Header base;
1339 static Header *freep;
1340
1341 void
1342 free(void *ap)
1343 {
1344 98c: e92d0830 push {r4, r5, fp}
1345 Header *bp, *p;
1346
1347 bp = (Header*)ap - 1;
1348 990: e240c008 sub ip, r0, #8
1349 for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr)
1350 994: e5932000 ldr r2, [r3]
1351 static Header base;
1352 static Header *freep;
1353
1354 void
1355 free(void *ap)
1356 {
1357 998: e28db008 add fp, sp, #8
1358 Header *bp, *p;
1359
1360 bp = (Header*)ap - 1;
1361 for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr)
1362 99c: e152000c cmp r2, ip
1363 9a0: e5921000 ldr r1, [r2]
1364 9a4: 2a000001 bcs 9b0 <free+0x28>
1365 9a8: e15c0001 cmp ip, r1
1366 9ac: 3a000007 bcc 9d0 <free+0x48>
1367 if(p >= p->s.ptr && (bp > p || bp < p->s.ptr))
1368 9b0: e1520001 cmp r2, r1
1369 9b4: 3a000003 bcc 9c8 <free+0x40>
1370 9b8: e152000c cmp r2, ip
1371 9bc: 3a000003 bcc 9d0 <free+0x48>
1372 9c0: e15c0001 cmp ip, r1
1373 9c4: 3a000001 bcc 9d0 <free+0x48>
1374 static Header base;
1375 static Header *freep;
1376
1377 void
1378 free(void *ap)
1379 {
1380 9c8: e1a02001 mov r2, r1
1381 9cc: eafffff2 b 99c <free+0x14>
1382
1383 bp = (Header*)ap - 1;
1384 for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr)
1385 if(p >= p->s.ptr && (bp > p || bp < p->s.ptr))
1386 break;
1387 if(bp + bp->s.size == p->s.ptr){
1388 9d0: e5104004 ldr r4, [r0, #-4]
1389 if(p + p->s.size == bp){
1390 p->s.size += bp->s.size;
1391 p->s.ptr = bp->s.ptr;
1392 } else
1393 p->s.ptr = bp;
1394 freep = p;
1395 9d4: e5832000 str r2, [r3]
1396
1397 bp = (Header*)ap - 1;
1398 for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr)
1399 if(p >= p->s.ptr && (bp > p || bp < p->s.ptr))
1400 break;
1401 if(bp + bp->s.size == p->s.ptr){
1402 9d8: e08c5184 add r5, ip, r4, lsl #3
1403 9dc: e1550001 cmp r5, r1
1404 bp->s.size += p->s.ptr->s.size;
1405 9e0: 05911004 ldreq r1, [r1, #4]
1406 9e4: 00814004 addeq r4, r1, r4
1407 9e8: 05004004 streq r4, [r0, #-4]
1408 bp->s.ptr = p->s.ptr->s.ptr;
1409 9ec: 05921000 ldreq r1, [r2]
1410 9f0: 05911000 ldreq r1, [r1]
1411 } else
1412 bp->s.ptr = p->s.ptr;
1413 9f4: e5001008 str r1, [r0, #-8]
1414 if(p + p->s.size == bp){
1415 9f8: e5921004 ldr r1, [r2, #4]
1416 9fc: e0824181 add r4, r2, r1, lsl #3
1417 a00: e15c0004 cmp ip, r4
1418 p->s.size += bp->s.size;
1419 p->s.ptr = bp->s.ptr;
1420 } else
1421 p->s.ptr = bp;
1422 a04: 1582c000 strne ip, [r2]
1423 bp->s.size += p->s.ptr->s.size;
1424 bp->s.ptr = p->s.ptr->s.ptr;
1425 } else
1426 bp->s.ptr = p->s.ptr;
1427 if(p + p->s.size == bp){
1428 p->s.size += bp->s.size;
1429 a08: 0510c004 ldreq ip, [r0, #-4]
1430 a0c: 008c1001 addeq r1, ip, r1
1431 a10: 05821004 streq r1, [r2, #4]
1432 p->s.ptr = bp->s.ptr;
1433 a14: 05101008 ldreq r1, [r0, #-8]
1434 a18: 05821000 streq r1, [r2]
1435 } else
1436 p->s.ptr = bp;
1437 freep = p;
1438 }
1439 a1c: e24bd008 sub sp, fp, #8
1440 a20: e8bd0830 pop {r4, r5, fp}
1441 a24: e12fff1e bx lr
1442 a28: 00000b54 .word 0x00000b54
1443
1444 00000a2c <malloc>:
1445 return freep;
1446 }
1447
1448 void*
1449 malloc(uint nbytes)
1450 {
1451 a2c: e92d49f8 push {r3, r4, r5, r6, r7, r8, fp, lr}
1452 Header *p, *prevp;
1453 uint nunits;
1454
1455 nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
1456 a30: e2804007 add r4, r0, #7
1457 if((prevp = freep) == 0){
1458 a34: e59f50d4 ldr r5, [pc, #212] ; b10 <malloc+0xe4>
1459 malloc(uint nbytes)
1460 {
1461 Header *p, *prevp;
1462 uint nunits;
1463
1464 nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
1465 a38: e1a041a4 lsr r4, r4, #3
1466 return freep;
1467 }
1468
1469 void*
1470 malloc(uint nbytes)
1471 {
1472 a3c: e28db01c add fp, sp, #28
1473 Header *p, *prevp;
1474 uint nunits;
1475
1476 nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
1477 if((prevp = freep) == 0){
1478 a40: e5953000 ldr r3, [r5]
1479 malloc(uint nbytes)
1480 {
1481 Header *p, *prevp;
1482 uint nunits;
1483
1484 nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
1485 a44: e2844001 add r4, r4, #1
1486 if((prevp = freep) == 0){
1487 a48: e3530000 cmp r3, #0
1488 a4c: 0a00002b beq b00 <malloc+0xd4>
1489 a50: e5930000 ldr r0, [r3]
1490 a54: e5902004 ldr r2, [r0, #4]
1491 base.s.ptr = freep = prevp = &base;
1492 base.s.size = 0;
1493 }
1494 for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){
1495 if(p->s.size >= nunits){
1496 a58: e1520004 cmp r2, r4
1497 a5c: 2a00001b bcs ad0 <malloc+0xa4>
1498 morecore(uint nu)
1499 {
1500 char *p;
1501 Header *hp;
1502
1503 if(nu < 4096)
1504 a60: e59f80ac ldr r8, [pc, #172] ; b14 <malloc+0xe8>
1505 p->s.size -= nunits;
1506 p += p->s.size;
1507 p->s.size = nunits;
1508 }
1509 freep = prevp;
1510 return (void*)(p + 1);
1511 a64: e1a07184 lsl r7, r4, #3
1512 a68: ea000003 b a7c <malloc+0x50>
1513 nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
1514 if((prevp = freep) == 0){
1515 base.s.ptr = freep = prevp = &base;
1516 base.s.size = 0;
1517 }
1518 for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){
1519 a6c: e5930000 ldr r0, [r3]
1520 if(p->s.size >= nunits){
1521 a70: e5902004 ldr r2, [r0, #4]
1522 a74: e1540002 cmp r4, r2
1523 a78: 9a000014 bls ad0 <malloc+0xa4>
1524 p->s.size = nunits;
1525 }
1526 freep = prevp;
1527 return (void*)(p + 1);
1528 }
1529 if(p == freep)
1530 a7c: e5952000 ldr r2, [r5]
1531 a80: e1a03000 mov r3, r0
1532 a84: e1500002 cmp r0, r2
1533 a88: 1afffff7 bne a6c <malloc+0x40>
1534 morecore(uint nu)
1535 {
1536 char *p;
1537 Header *hp;
1538
1539 if(nu < 4096)
1540 a8c: e1540008 cmp r4, r8
1541 nu = 4096;
1542 p = sbrk(nu * sizeof(Header));
1543 a90: 81a00007 movhi r0, r7
1544 a94: 93a00902 movls r0, #32768 ; 0x8000
1545 morecore(uint nu)
1546 {
1547 char *p;
1548 Header *hp;
1549
1550 if(nu < 4096)
1551 a98: 81a06004 movhi r6, r4
1552 a9c: 93a06a01 movls r6, #4096 ; 0x1000
1553 nu = 4096;
1554 p = sbrk(nu * sizeof(Header));
1555 aa0: ebfffeec bl 658 <sbrk>
1556 aa4: e1a03000 mov r3, r0
1557 if(p == (char*)-1)
1558 aa8: e3730001 cmn r3, #1
1559 return 0;
1560 hp = (Header*)p;
1561 hp->s.size = nu;
1562 free((void*)(hp + 1));
1563 aac: e2800008 add r0, r0, #8
1564 Header *hp;
1565
1566 if(nu < 4096)
1567 nu = 4096;
1568 p = sbrk(nu * sizeof(Header));
1569 if(p == (char*)-1)
1570 ab0: 0a000010 beq af8 <malloc+0xcc>
1571 return 0;
1572 hp = (Header*)p;
1573 hp->s.size = nu;
1574 ab4: e5836004 str r6, [r3, #4]
1575 free((void*)(hp + 1));
1576 ab8: ebffffb2 bl 988 <free>
1577 return freep;
1578 abc: e5953000 ldr r3, [r5]
1579 }
1580 freep = prevp;
1581 return (void*)(p + 1);
1582 }
1583 if(p == freep)
1584 if((p = morecore(nunits)) == 0)
1585 ac0: e3530000 cmp r3, #0
1586 ac4: 1affffe8 bne a6c <malloc+0x40>
1587 return 0;
1588 ac8: e1a00003 mov r0, r3
1589 }
1590 }
1591 acc: e8bd89f8 pop {r3, r4, r5, r6, r7, r8, fp, pc}
1592 base.s.ptr = freep = prevp = &base;
1593 base.s.size = 0;
1594 }
1595 for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){
1596 if(p->s.size >= nunits){
1597 if(p->s.size == nunits)
1598 ad0: e1540002 cmp r4, r2
1599 prevp->s.ptr = p->s.ptr;
1600 else {
1601 p->s.size -= nunits;
1602 ad4: 10642002 rsbne r2, r4, r2
1603 ad8: 15802004 strne r2, [r0, #4]
1604 base.s.size = 0;
1605 }
1606 for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){
1607 if(p->s.size >= nunits){
1608 if(p->s.size == nunits)
1609 prevp->s.ptr = p->s.ptr;
1610 adc: 05902000 ldreq r2, [r0]
1611 else {
1612 p->s.size -= nunits;
1613 p += p->s.size;
1614 ae0: 10800182 addne r0, r0, r2, lsl #3
1615 base.s.size = 0;
1616 }
1617 for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){
1618 if(p->s.size >= nunits){
1619 if(p->s.size == nunits)
1620 prevp->s.ptr = p->s.ptr;
1621 ae4: 05832000 streq r2, [r3]
1622 else {
1623 p->s.size -= nunits;
1624 p += p->s.size;
1625 p->s.size = nunits;
1626 ae8: 15804004 strne r4, [r0, #4]
1627 }
1628 freep = prevp;
1629 aec: e5853000 str r3, [r5]
1630 return (void*)(p + 1);
1631 af0: e2800008 add r0, r0, #8
1632 af4: e8bd89f8 pop {r3, r4, r5, r6, r7, r8, fp, pc}
1633 }
1634 if(p == freep)
1635 if((p = morecore(nunits)) == 0)
1636 return 0;
1637 af8: e3a00000 mov r0, #0
1638 afc: e8bd89f8 pop {r3, r4, r5, r6, r7, r8, fp, pc}
1639 Header *p, *prevp;
1640 uint nunits;
1641
1642 nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
1643 if((prevp = freep) == 0){
1644 base.s.ptr = freep = prevp = &base;
1645 b00: e2850004 add r0, r5, #4
1646 b04: e5850000 str r0, [r5]
1647 base.s.size = 0;
1648 b08: e9850009 stmib r5, {r0, r3}
1649 b0c: eaffffd3 b a60 <malloc+0x34>
1650 b10: 00000b54 .word 0x00000b54
1651 b14: 00000fff .word 0x00000fff