Mercurial > hg > Members > innparusu > xv6_rpi_port
diff uprogs/cat.asm @ 0:c450faca55f4
Init
author | Tatsuki IHA <innparusu@cr.ie.u-ryukyu.ac.jp> |
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date | Sun, 22 Oct 2017 18:25:39 +0900 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/uprogs/cat.asm Sun Oct 22 18:25:39 2017 +0900 @@ -0,0 +1,1762 @@ + +_cat: file format elf32-littlearm + + +Disassembly of section .text: + +00000000 <main>: +int +main(int argc, char *argv[]) +{ + int fd, i; + + if(argc <= 1){ + 0: e3500001 cmp r0, #1 + } +} + +int +main(int argc, char *argv[]) +{ + 4: e92d49f8 push {r3, r4, r5, r6, r7, r8, fp, lr} + 8: e1a07000 mov r7, r0 + c: e28db01c add fp, sp, #28 + exit(); + } +} + +int +main(int argc, char *argv[]) + 10: c2814004 addgt r4, r1, #4 + 14: c3a05001 movgt r5, #1 +{ + int fd, i; + + if(argc <= 1){ + 18: da000012 ble 68 <main+0x68> + cat(0); + exit(); + } + + for(i = 1; i < argc; i++){ + if((fd = open(argv[i], 0)) < 0){ + 1c: e5940000 ldr r0, [r4] + 20: e3a01000 mov r1, #0 + 24: eb000137 bl 508 <open> + 28: e1a06004 mov r6, r4 + 2c: e2844004 add r4, r4, #4 + 30: e2508000 subs r8, r0, #0 + 34: ba000006 blt 54 <main+0x54> + printf(1, "cat: cannot open %s\n", argv[i]); + exit(); + } + cat(fd); + 38: eb00000e bl 78 <cat> + if(argc <= 1){ + cat(0); + exit(); + } + + for(i = 1; i < argc; i++){ + 3c: e2855001 add r5, r5, #1 + if((fd = open(argv[i], 0)) < 0){ + printf(1, "cat: cannot open %s\n", argv[i]); + exit(); + } + cat(fd); + close(fd); + 40: e1a00008 mov r0, r8 + 44: eb000108 bl 46c <close> + if(argc <= 1){ + cat(0); + exit(); + } + + for(i = 1; i < argc; i++){ + 48: e1550007 cmp r5, r7 + 4c: 1afffff2 bne 1c <main+0x1c> + exit(); + } + cat(fd); + close(fd); + } + exit(); + 50: eb0000c4 bl 368 <exit> + exit(); + } + + for(i = 1; i < argc; i++){ + if((fd = open(argv[i], 0)) < 0){ + printf(1, "cat: cannot open %s\n", argv[i]); + 54: e3a00001 mov r0, #1 + 58: e59f1014 ldr r1, [pc, #20] ; 74 <main+0x74> + 5c: e5962000 ldr r2, [r6] + 60: eb000213 bl 8b4 <printf> + exit(); + 64: eb0000bf bl 368 <exit> +main(int argc, char *argv[]) +{ + int fd, i; + + if(argc <= 1){ + cat(0); + 68: e3a00000 mov r0, #0 + 6c: eb000001 bl 78 <cat> + exit(); + 70: eb0000bc bl 368 <exit> + 74: 00000bb0 .word 0x00000bb0 + +00000078 <cat>: + +char buf[512]; + +void +cat(int fd) +{ + 78: e92d4818 push {r3, r4, fp, lr} + 7c: e1a04000 mov r4, r0 + 80: e28db00c add fp, sp, #12 + int n; + while((n = read(fd, buf, sizeof(buf))) > 0) + 84: ea000002 b 94 <cat+0x1c> + write(1, buf, n); + 88: e3a00001 mov r0, #1 + 8c: e59f102c ldr r1, [pc, #44] ; c0 <cat+0x48> + 90: eb0000e8 bl 438 <write> + +void +cat(int fd) +{ + int n; + while((n = read(fd, buf, sizeof(buf))) > 0) + 94: e3a02c02 mov r2, #512 ; 0x200 + 98: e1a00004 mov r0, r4 + 9c: e59f101c ldr r1, [pc, #28] ; c0 <cat+0x48> + a0: eb0000d7 bl 404 <read> + a4: e2502000 subs r2, r0, #0 + a8: cafffff6 bgt 88 <cat+0x10> + write(1, buf, n); + if(n < 0){ + ac: 08bd8818 popeq {r3, r4, fp, pc} + printf(1, "cat: read error\n"); + b0: e3a00001 mov r0, #1 + b4: e59f1008 ldr r1, [pc, #8] ; c4 <cat+0x4c> + b8: eb0001fd bl 8b4 <printf> + exit(); + bc: eb0000a9 bl 368 <exit> + c0: 00000bf0 .word 0x00000bf0 + c4: 00000b9c .word 0x00000b9c + +000000c8 <strcpy>: +#include "user.h" +#include "arm.h" + +char* +strcpy(char *s, char *t) +{ + c8: e52db004 push {fp} ; (str fp, [sp, #-4]!) + char *os; + + os = s; + while((*s++ = *t++) != 0) + cc: e1a02000 mov r2, r0 +#include "user.h" +#include "arm.h" + +char* +strcpy(char *s, char *t) +{ + d0: e28db000 add fp, sp, #0 + char *os; + + os = s; + while((*s++ = *t++) != 0) + d4: e4d13001 ldrb r3, [r1], #1 + d8: e3530000 cmp r3, #0 + dc: e4c23001 strb r3, [r2], #1 + e0: 1afffffb bne d4 <strcpy+0xc> + ; + return os; +} + e4: e28bd000 add sp, fp, #0 + e8: e8bd0800 pop {fp} + ec: e12fff1e bx lr + +000000f0 <strcmp>: + +int +strcmp(const char *p, const char *q) +{ + f0: e52db004 push {fp} ; (str fp, [sp, #-4]!) + f4: e28db000 add fp, sp, #0 + while(*p && *p == *q) + f8: e5d03000 ldrb r3, [r0] + fc: e5d12000 ldrb r2, [r1] + 100: e3530000 cmp r3, #0 + 104: 1a000004 bne 11c <strcmp+0x2c> + 108: ea000005 b 124 <strcmp+0x34> + 10c: e5f03001 ldrb r3, [r0, #1]! + 110: e3530000 cmp r3, #0 + 114: 0a000006 beq 134 <strcmp+0x44> + 118: e5f12001 ldrb r2, [r1, #1]! + 11c: e1530002 cmp r3, r2 + 120: 0afffff9 beq 10c <strcmp+0x1c> + p++, q++; + return (uchar)*p - (uchar)*q; +} + 124: e0620003 rsb r0, r2, r3 + 128: e28bd000 add sp, fp, #0 + 12c: e8bd0800 pop {fp} + 130: e12fff1e bx lr +} + +int +strcmp(const char *p, const char *q) +{ + while(*p && *p == *q) + 134: e5d12001 ldrb r2, [r1, #1] + 138: eafffff9 b 124 <strcmp+0x34> + +0000013c <strlen>: + return (uchar)*p - (uchar)*q; +} + +uint +strlen(char *s) +{ + 13c: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 140: e28db000 add fp, sp, #0 + int n; + + for(n = 0; s[n]; n++) + 144: e5d03000 ldrb r3, [r0] + 148: e3530000 cmp r3, #0 + 14c: 01a00003 moveq r0, r3 + 150: 0a000006 beq 170 <strlen+0x34> + 154: e1a02000 mov r2, r0 + 158: e3a03000 mov r3, #0 + 15c: e5f21001 ldrb r1, [r2, #1]! + 160: e2833001 add r3, r3, #1 + 164: e1a00003 mov r0, r3 + 168: e3510000 cmp r1, #0 + 16c: 1afffffa bne 15c <strlen+0x20> + ; + return n; +} + 170: e28bd000 add sp, fp, #0 + 174: e8bd0800 pop {fp} + 178: e12fff1e bx lr + +0000017c <memset>: +memset(void *dst, int c, uint n) +{ + char *p=dst; + u32 rc=n; + + while (rc-- > 0) *p++ = c; + 17c: e3520000 cmp r2, #0 + return n; +} + +void* +memset(void *dst, int c, uint n) +{ + 180: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 184: e28db000 add fp, sp, #0 + char *p=dst; + u32 rc=n; + + while (rc-- > 0) *p++ = c; + 188: 0a000006 beq 1a8 <memset+0x2c> + 18c: e6ef1071 uxtb r1, r1 + 190: e1a03002 mov r3, r2 +} + +void* +memset(void *dst, int c, uint n) +{ + char *p=dst; + 194: e1a0c000 mov ip, r0 + u32 rc=n; + + while (rc-- > 0) *p++ = c; + 198: e2533001 subs r3, r3, #1 + 19c: e4cc1001 strb r1, [ip], #1 + 1a0: 1afffffc bne 198 <memset+0x1c> + 1a4: e0800002 add r0, r0, r2 + return (void *)p; +} + 1a8: e28bd000 add sp, fp, #0 + 1ac: e8bd0800 pop {fp} + 1b0: e12fff1e bx lr + +000001b4 <strchr>: + +char* +strchr(const char *s, char c) +{ + 1b4: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 1b8: e28db000 add fp, sp, #0 + for(; *s; s++) + 1bc: e5d03000 ldrb r3, [r0] + 1c0: e3530000 cmp r3, #0 + 1c4: 1a000004 bne 1dc <strchr+0x28> + 1c8: ea000008 b 1f0 <strchr+0x3c> + 1cc: e5d03001 ldrb r3, [r0, #1] + 1d0: e2800001 add r0, r0, #1 + 1d4: e3530000 cmp r3, #0 + 1d8: 0a000004 beq 1f0 <strchr+0x3c> + if(*s == c) + 1dc: e1530001 cmp r3, r1 + 1e0: 1afffff9 bne 1cc <strchr+0x18> + return (char*)s; + return 0; +} + 1e4: e28bd000 add sp, fp, #0 + 1e8: e8bd0800 pop {fp} + 1ec: e12fff1e bx lr +strchr(const char *s, char c) +{ + for(; *s; s++) + if(*s == c) + return (char*)s; + return 0; + 1f0: e1a00003 mov r0, r3 + 1f4: eafffffa b 1e4 <strchr+0x30> + +000001f8 <gets>: +} + +char* +gets(char *buf, int max) +{ + 1f8: e92d49f0 push {r4, r5, r6, r7, r8, fp, lr} + 1fc: e28db018 add fp, sp, #24 + 200: e24dd00c sub sp, sp, #12 + 204: e1a08000 mov r8, r0 + 208: e1a07001 mov r7, r1 + int i, cc; + char c; + + for(i=0; i+1 < max; ){ + 20c: e1a06000 mov r6, r0 + 210: e3a05000 mov r5, #0 + 214: ea000008 b 23c <gets+0x44> + cc = read(0, &c, 1); + 218: eb000079 bl 404 <read> + if(cc < 1) + 21c: e3500000 cmp r0, #0 + 220: da00000b ble 254 <gets+0x5c> + break; + buf[i++] = c; + 224: e55b301d ldrb r3, [fp, #-29] + if(c == '\n' || c == '\r') + 228: e1a05004 mov r5, r4 + 22c: e353000a cmp r3, #10 + 230: 1353000d cmpne r3, #13 + + for(i=0; i+1 < max; ){ + cc = read(0, &c, 1); + if(cc < 1) + break; + buf[i++] = c; + 234: e4c63001 strb r3, [r6], #1 + if(c == '\n' || c == '\r') + 238: 0a00000a beq 268 <gets+0x70> +{ + int i, cc; + char c; + + for(i=0; i+1 < max; ){ + cc = read(0, &c, 1); + 23c: e3a02001 mov r2, #1 +gets(char *buf, int max) +{ + int i, cc; + char c; + + for(i=0; i+1 < max; ){ + 240: e0854002 add r4, r5, r2 + 244: e1540007 cmp r4, r7 + cc = read(0, &c, 1); + 248: e3a00000 mov r0, #0 + 24c: e24b101d sub r1, fp, #29 +gets(char *buf, int max) +{ + int i, cc; + char c; + + for(i=0; i+1 < max; ){ + 250: bafffff0 blt 218 <gets+0x20> + break; + buf[i++] = c; + if(c == '\n' || c == '\r') + break; + } + buf[i] = '\0'; + 254: e3a03000 mov r3, #0 + 258: e7c83005 strb r3, [r8, r5] + return buf; +} + 25c: e1a00008 mov r0, r8 + 260: e24bd018 sub sp, fp, #24 + 264: e8bd89f0 pop {r4, r5, r6, r7, r8, fp, pc} +gets(char *buf, int max) +{ + int i, cc; + char c; + + for(i=0; i+1 < max; ){ + 268: e1a05004 mov r5, r4 + 26c: eafffff8 b 254 <gets+0x5c> + +00000270 <stat>: + return buf; +} + +int +stat(char *n, struct stat *st) +{ + 270: e92d4830 push {r4, r5, fp, lr} + 274: e1a05001 mov r5, r1 + 278: e28db00c add fp, sp, #12 + int fd; + int r; + + fd = open(n, O_RDONLY); + 27c: e3a01000 mov r1, #0 + 280: eb0000a0 bl 508 <open> + if(fd < 0) + 284: e2504000 subs r4, r0, #0 + return -1; + 288: b3e05000 mvnlt r5, #0 +{ + int fd; + int r; + + fd = open(n, O_RDONLY); + if(fd < 0) + 28c: ba000004 blt 2a4 <stat+0x34> + return -1; + r = fstat(fd, st); + 290: e1a01005 mov r1, r5 + 294: eb0000c2 bl 5a4 <fstat> + 298: e1a05000 mov r5, r0 + close(fd); + 29c: e1a00004 mov r0, r4 + 2a0: eb000071 bl 46c <close> + return r; +} + 2a4: e1a00005 mov r0, r5 + 2a8: e8bd8830 pop {r4, r5, fp, pc} + +000002ac <atoi>: + +int +atoi(const char *s) +{ + 2ac: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 2b0: e28db000 add fp, sp, #0 + int n; + + n = 0; + while('0' <= *s && *s <= '9') + 2b4: e5d03000 ldrb r3, [r0] + 2b8: e2432030 sub r2, r3, #48 ; 0x30 + 2bc: e6ef2072 uxtb r2, r2 + 2c0: e3520009 cmp r2, #9 +int +atoi(const char *s) +{ + int n; + + n = 0; + 2c4: 83a00000 movhi r0, #0 + while('0' <= *s && *s <= '9') + 2c8: 8a000009 bhi 2f4 <atoi+0x48> + 2cc: e1a02000 mov r2, r0 +int +atoi(const char *s) +{ + int n; + + n = 0; + 2d0: e3a00000 mov r0, #0 + while('0' <= *s && *s <= '9') + n = n*10 + *s++ - '0'; + 2d4: e0800100 add r0, r0, r0, lsl #2 + 2d8: e0830080 add r0, r3, r0, lsl #1 +atoi(const char *s) +{ + int n; + + n = 0; + while('0' <= *s && *s <= '9') + 2dc: e5f23001 ldrb r3, [r2, #1]! + n = n*10 + *s++ - '0'; + 2e0: e2400030 sub r0, r0, #48 ; 0x30 +atoi(const char *s) +{ + int n; + + n = 0; + while('0' <= *s && *s <= '9') + 2e4: e2431030 sub r1, r3, #48 ; 0x30 + 2e8: e6ef1071 uxtb r1, r1 + 2ec: e3510009 cmp r1, #9 + 2f0: 9afffff7 bls 2d4 <atoi+0x28> + n = n*10 + *s++ - '0'; + return n; +} + 2f4: e28bd000 add sp, fp, #0 + 2f8: e8bd0800 pop {fp} + 2fc: e12fff1e bx lr + +00000300 <memmove>: +{ + char *dst, *src; + + dst = vdst; + src = vsrc; + while(n-- > 0) + 300: e3520000 cmp r2, #0 + return n; +} + +void* +memmove(void *vdst, void *vsrc, int n) +{ + 304: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 308: e28db000 add fp, sp, #0 + char *dst, *src; + + dst = vdst; + src = vsrc; + while(n-- > 0) + 30c: da000005 ble 328 <memmove+0x28> + n = n*10 + *s++ - '0'; + return n; +} + +void* +memmove(void *vdst, void *vsrc, int n) + 310: e0802002 add r2, r0, r2 +{ + char *dst, *src; + + dst = vdst; + 314: e1a03000 mov r3, r0 + src = vsrc; + while(n-- > 0) + *dst++ = *src++; + 318: e4d1c001 ldrb ip, [r1], #1 + 31c: e4c3c001 strb ip, [r3], #1 +{ + char *dst, *src; + + dst = vdst; + src = vsrc; + while(n-- > 0) + 320: e1530002 cmp r3, r2 + 324: 1afffffb bne 318 <memmove+0x18> + *dst++ = *src++; + return vdst; +} + 328: e28bd000 add sp, fp, #0 + 32c: e8bd0800 pop {fp} + 330: e12fff1e bx lr + +00000334 <fork>: + 334: e92d4000 push {lr} + 338: e92d0008 push {r3} + 33c: e92d0004 push {r2} + 340: e92d0002 push {r1} + 344: e92d0001 push {r0} + 348: e3a00001 mov r0, #1 + 34c: ef000040 svc 0x00000040 + 350: e8bd0002 pop {r1} + 354: e8bd0002 pop {r1} + 358: e8bd0004 pop {r2} + 35c: e8bd0008 pop {r3} + 360: e8bd4000 pop {lr} + 364: e12fff1e bx lr + +00000368 <exit>: + 368: e92d4000 push {lr} + 36c: e92d0008 push {r3} + 370: e92d0004 push {r2} + 374: e92d0002 push {r1} + 378: e92d0001 push {r0} + 37c: e3a00002 mov r0, #2 + 380: ef000040 svc 0x00000040 + 384: e8bd0002 pop {r1} + 388: e8bd0002 pop {r1} + 38c: e8bd0004 pop {r2} + 390: e8bd0008 pop {r3} + 394: e8bd4000 pop {lr} + 398: e12fff1e bx lr + +0000039c <wait>: + 39c: e92d4000 push {lr} + 3a0: e92d0008 push {r3} + 3a4: e92d0004 push {r2} + 3a8: e92d0002 push {r1} + 3ac: e92d0001 push {r0} + 3b0: e3a00003 mov r0, #3 + 3b4: ef000040 svc 0x00000040 + 3b8: e8bd0002 pop {r1} + 3bc: e8bd0002 pop {r1} + 3c0: e8bd0004 pop {r2} + 3c4: e8bd0008 pop {r3} + 3c8: e8bd4000 pop {lr} + 3cc: e12fff1e bx lr + +000003d0 <pipe>: + 3d0: e92d4000 push {lr} + 3d4: e92d0008 push {r3} + 3d8: e92d0004 push {r2} + 3dc: e92d0002 push {r1} + 3e0: e92d0001 push {r0} + 3e4: e3a00004 mov r0, #4 + 3e8: ef000040 svc 0x00000040 + 3ec: e8bd0002 pop {r1} + 3f0: e8bd0002 pop {r1} + 3f4: e8bd0004 pop {r2} + 3f8: e8bd0008 pop {r3} + 3fc: e8bd4000 pop {lr} + 400: e12fff1e bx lr + +00000404 <read>: + 404: e92d4000 push {lr} + 408: e92d0008 push {r3} + 40c: e92d0004 push {r2} + 410: e92d0002 push {r1} + 414: e92d0001 push {r0} + 418: e3a00005 mov r0, #5 + 41c: ef000040 svc 0x00000040 + 420: e8bd0002 pop {r1} + 424: e8bd0002 pop {r1} + 428: e8bd0004 pop {r2} + 42c: e8bd0008 pop {r3} + 430: e8bd4000 pop {lr} + 434: e12fff1e bx lr + +00000438 <write>: + 438: e92d4000 push {lr} + 43c: e92d0008 push {r3} + 440: e92d0004 push {r2} + 444: e92d0002 push {r1} + 448: e92d0001 push {r0} + 44c: e3a00010 mov r0, #16 + 450: ef000040 svc 0x00000040 + 454: e8bd0002 pop {r1} + 458: e8bd0002 pop {r1} + 45c: e8bd0004 pop {r2} + 460: e8bd0008 pop {r3} + 464: e8bd4000 pop {lr} + 468: e12fff1e bx lr + +0000046c <close>: + 46c: e92d4000 push {lr} + 470: e92d0008 push {r3} + 474: e92d0004 push {r2} + 478: e92d0002 push {r1} + 47c: e92d0001 push {r0} + 480: e3a00015 mov r0, #21 + 484: ef000040 svc 0x00000040 + 488: e8bd0002 pop {r1} + 48c: e8bd0002 pop {r1} + 490: e8bd0004 pop {r2} + 494: e8bd0008 pop {r3} + 498: e8bd4000 pop {lr} + 49c: e12fff1e bx lr + +000004a0 <kill>: + 4a0: e92d4000 push {lr} + 4a4: e92d0008 push {r3} + 4a8: e92d0004 push {r2} + 4ac: e92d0002 push {r1} + 4b0: e92d0001 push {r0} + 4b4: e3a00006 mov r0, #6 + 4b8: ef000040 svc 0x00000040 + 4bc: e8bd0002 pop {r1} + 4c0: e8bd0002 pop {r1} + 4c4: e8bd0004 pop {r2} + 4c8: e8bd0008 pop {r3} + 4cc: e8bd4000 pop {lr} + 4d0: e12fff1e bx lr + +000004d4 <exec>: + 4d4: e92d4000 push {lr} + 4d8: e92d0008 push {r3} + 4dc: e92d0004 push {r2} + 4e0: e92d0002 push {r1} + 4e4: e92d0001 push {r0} + 4e8: e3a00007 mov r0, #7 + 4ec: ef000040 svc 0x00000040 + 4f0: e8bd0002 pop {r1} + 4f4: e8bd0002 pop {r1} + 4f8: e8bd0004 pop {r2} + 4fc: e8bd0008 pop {r3} + 500: e8bd4000 pop {lr} + 504: e12fff1e bx lr + +00000508 <open>: + 508: e92d4000 push {lr} + 50c: e92d0008 push {r3} + 510: e92d0004 push {r2} + 514: e92d0002 push {r1} + 518: e92d0001 push {r0} + 51c: e3a0000f mov r0, #15 + 520: ef000040 svc 0x00000040 + 524: e8bd0002 pop {r1} + 528: e8bd0002 pop {r1} + 52c: e8bd0004 pop {r2} + 530: e8bd0008 pop {r3} + 534: e8bd4000 pop {lr} + 538: e12fff1e bx lr + +0000053c <mknod>: + 53c: e92d4000 push {lr} + 540: e92d0008 push {r3} + 544: e92d0004 push {r2} + 548: e92d0002 push {r1} + 54c: e92d0001 push {r0} + 550: e3a00011 mov r0, #17 + 554: ef000040 svc 0x00000040 + 558: e8bd0002 pop {r1} + 55c: e8bd0002 pop {r1} + 560: e8bd0004 pop {r2} + 564: e8bd0008 pop {r3} + 568: e8bd4000 pop {lr} + 56c: e12fff1e bx lr + +00000570 <unlink>: + 570: e92d4000 push {lr} + 574: e92d0008 push {r3} + 578: e92d0004 push {r2} + 57c: e92d0002 push {r1} + 580: e92d0001 push {r0} + 584: e3a00012 mov r0, #18 + 588: ef000040 svc 0x00000040 + 58c: e8bd0002 pop {r1} + 590: e8bd0002 pop {r1} + 594: e8bd0004 pop {r2} + 598: e8bd0008 pop {r3} + 59c: e8bd4000 pop {lr} + 5a0: e12fff1e bx lr + +000005a4 <fstat>: + 5a4: e92d4000 push {lr} + 5a8: e92d0008 push {r3} + 5ac: e92d0004 push {r2} + 5b0: e92d0002 push {r1} + 5b4: e92d0001 push {r0} + 5b8: e3a00008 mov r0, #8 + 5bc: ef000040 svc 0x00000040 + 5c0: e8bd0002 pop {r1} + 5c4: e8bd0002 pop {r1} + 5c8: e8bd0004 pop {r2} + 5cc: e8bd0008 pop {r3} + 5d0: e8bd4000 pop {lr} + 5d4: e12fff1e bx lr + +000005d8 <link>: + 5d8: e92d4000 push {lr} + 5dc: e92d0008 push {r3} + 5e0: e92d0004 push {r2} + 5e4: e92d0002 push {r1} + 5e8: e92d0001 push {r0} + 5ec: e3a00013 mov r0, #19 + 5f0: ef000040 svc 0x00000040 + 5f4: e8bd0002 pop {r1} + 5f8: e8bd0002 pop {r1} + 5fc: e8bd0004 pop {r2} + 600: e8bd0008 pop {r3} + 604: e8bd4000 pop {lr} + 608: e12fff1e bx lr + +0000060c <mkdir>: + 60c: e92d4000 push {lr} + 610: e92d0008 push {r3} + 614: e92d0004 push {r2} + 618: e92d0002 push {r1} + 61c: e92d0001 push {r0} + 620: e3a00014 mov r0, #20 + 624: ef000040 svc 0x00000040 + 628: e8bd0002 pop {r1} + 62c: e8bd0002 pop {r1} + 630: e8bd0004 pop {r2} + 634: e8bd0008 pop {r3} + 638: e8bd4000 pop {lr} + 63c: e12fff1e bx lr + +00000640 <chdir>: + 640: e92d4000 push {lr} + 644: e92d0008 push {r3} + 648: e92d0004 push {r2} + 64c: e92d0002 push {r1} + 650: e92d0001 push {r0} + 654: e3a00009 mov r0, #9 + 658: ef000040 svc 0x00000040 + 65c: e8bd0002 pop {r1} + 660: e8bd0002 pop {r1} + 664: e8bd0004 pop {r2} + 668: e8bd0008 pop {r3} + 66c: e8bd4000 pop {lr} + 670: e12fff1e bx lr + +00000674 <dup>: + 674: e92d4000 push {lr} + 678: e92d0008 push {r3} + 67c: e92d0004 push {r2} + 680: e92d0002 push {r1} + 684: e92d0001 push {r0} + 688: e3a0000a mov r0, #10 + 68c: ef000040 svc 0x00000040 + 690: e8bd0002 pop {r1} + 694: e8bd0002 pop {r1} + 698: e8bd0004 pop {r2} + 69c: e8bd0008 pop {r3} + 6a0: e8bd4000 pop {lr} + 6a4: e12fff1e bx lr + +000006a8 <getpid>: + 6a8: e92d4000 push {lr} + 6ac: e92d0008 push {r3} + 6b0: e92d0004 push {r2} + 6b4: e92d0002 push {r1} + 6b8: e92d0001 push {r0} + 6bc: e3a0000b mov r0, #11 + 6c0: ef000040 svc 0x00000040 + 6c4: e8bd0002 pop {r1} + 6c8: e8bd0002 pop {r1} + 6cc: e8bd0004 pop {r2} + 6d0: e8bd0008 pop {r3} + 6d4: e8bd4000 pop {lr} + 6d8: e12fff1e bx lr + +000006dc <sbrk>: + 6dc: e92d4000 push {lr} + 6e0: e92d0008 push {r3} + 6e4: e92d0004 push {r2} + 6e8: e92d0002 push {r1} + 6ec: e92d0001 push {r0} + 6f0: e3a0000c mov r0, #12 + 6f4: ef000040 svc 0x00000040 + 6f8: e8bd0002 pop {r1} + 6fc: e8bd0002 pop {r1} + 700: e8bd0004 pop {r2} + 704: e8bd0008 pop {r3} + 708: e8bd4000 pop {lr} + 70c: e12fff1e bx lr + +00000710 <sleep>: + 710: e92d4000 push {lr} + 714: e92d0008 push {r3} + 718: e92d0004 push {r2} + 71c: e92d0002 push {r1} + 720: e92d0001 push {r0} + 724: e3a0000d mov r0, #13 + 728: ef000040 svc 0x00000040 + 72c: e8bd0002 pop {r1} + 730: e8bd0002 pop {r1} + 734: e8bd0004 pop {r2} + 738: e8bd0008 pop {r3} + 73c: e8bd4000 pop {lr} + 740: e12fff1e bx lr + +00000744 <uptime>: + 744: e92d4000 push {lr} + 748: e92d0008 push {r3} + 74c: e92d0004 push {r2} + 750: e92d0002 push {r1} + 754: e92d0001 push {r0} + 758: e3a0000e mov r0, #14 + 75c: ef000040 svc 0x00000040 + 760: e8bd0002 pop {r1} + 764: e8bd0002 pop {r1} + 768: e8bd0004 pop {r2} + 76c: e8bd0008 pop {r3} + 770: e8bd4000 pop {lr} + 774: e12fff1e bx lr + +00000778 <putc>: +#include "stat.h" +#include "user.h" + +static void +putc(int fd, char c) +{ + 778: e92d4800 push {fp, lr} + 77c: e28db004 add fp, sp, #4 + 780: e24b3004 sub r3, fp, #4 + 784: e24dd008 sub sp, sp, #8 + write(fd, &c, 1); + 788: e3a02001 mov r2, #1 +#include "stat.h" +#include "user.h" + +static void +putc(int fd, char c) +{ + 78c: e5631001 strb r1, [r3, #-1]! + write(fd, &c, 1); + 790: e1a01003 mov r1, r3 + 794: ebffff27 bl 438 <write> +} + 798: e24bd004 sub sp, fp, #4 + 79c: e8bd8800 pop {fp, pc} + +000007a0 <printint>: + return q; +} + +static void +printint(int fd, int xx, int base, int sgn) +{ + 7a0: e92d4ff0 push {r4, r5, r6, r7, r8, r9, sl, fp, lr} + 7a4: e1a04000 mov r4, r0 + char buf[16]; + int i, neg; + uint x, y, b; + + neg = 0; + if(sgn && xx < 0){ + 7a8: e1a00fa1 lsr r0, r1, #31 + 7ac: e3530000 cmp r3, #0 + 7b0: 03a03000 moveq r3, #0 + 7b4: 12003001 andne r3, r0, #1 + return q; +} + +static void +printint(int fd, int xx, int base, int sgn) +{ + 7b8: e28db020 add fp, sp, #32 + char buf[16]; + int i, neg; + uint x, y, b; + + neg = 0; + if(sgn && xx < 0){ + 7bc: e3530000 cmp r3, #0 + return q; +} + +static void +printint(int fd, int xx, int base, int sgn) +{ + 7c0: e24dd014 sub sp, sp, #20 + 7c4: e59f909c ldr r9, [pc, #156] ; 868 <printint+0xc8> + uint x, y, b; + + neg = 0; + if(sgn && xx < 0){ + neg = 1; + x = -xx; + 7c8: 12611000 rsbne r1, r1, #0 + int i, neg; + uint x, y, b; + + neg = 0; + if(sgn && xx < 0){ + neg = 1; + 7cc: 13a03001 movne r3, #1 + } else { + x = xx; + } + + b = base; + i = 0; + 7d0: e3a0a000 mov sl, #0 + 7d4: e24b6034 sub r6, fp, #52 ; 0x34 + for(i=31;i>=0;i--){ + r = r << 1; + r = r | ((n >> i) & 1); + if(r >= d) { + r = r - d; + q = q | (1 << i); + 7d8: e3a08001 mov r8, #1 + write(fd, &c, 1); +} + +u32 div(u32 n, u32 d) // long division +{ + u32 q=0, r=0; + 7dc: e3a07000 mov r7, #0 + int i; + + for(i=31;i>=0;i--){ + 7e0: e3a0001f mov r0, #31 + write(fd, &c, 1); +} + +u32 div(u32 n, u32 d) // long division +{ + u32 q=0, r=0; + 7e4: e1a0c007 mov ip, r7 + int i; + + for(i=31;i>=0;i--){ + r = r << 1; + r = r | ((n >> i) & 1); + 7e8: e1a0e031 lsr lr, r1, r0 + 7ec: e20ee001 and lr, lr, #1 + 7f0: e18ec08c orr ip, lr, ip, lsl #1 + if(r >= d) { + 7f4: e152000c cmp r2, ip + r = r - d; + q = q | (1 << i); + 7f8: 91877018 orrls r7, r7, r8, lsl r0 + + for(i=31;i>=0;i--){ + r = r << 1; + r = r | ((n >> i) & 1); + if(r >= d) { + r = r - d; + 7fc: 9062c00c rsbls ip, r2, ip +u32 div(u32 n, u32 d) // long division +{ + u32 q=0, r=0; + int i; + + for(i=31;i>=0;i--){ + 800: e2500001 subs r0, r0, #1 + 804: 2afffff7 bcs 7e8 <printint+0x48> + + b = base; + i = 0; + do{ + y = div(x, b); + buf[i++] = digits[x - y * b]; + 808: e0000792 mul r0, r2, r7 + }while((x = y) != 0); + 80c: e3570000 cmp r7, #0 + + b = base; + i = 0; + do{ + y = div(x, b); + buf[i++] = digits[x - y * b]; + 810: e0601001 rsb r1, r0, r1 + 814: e28a5001 add r5, sl, #1 + 818: e7d91001 ldrb r1, [r9, r1] + 81c: e7c6100a strb r1, [r6, sl] + }while((x = y) != 0); + 820: 11a01007 movne r1, r7 + + b = base; + i = 0; + do{ + y = div(x, b); + buf[i++] = digits[x - y * b]; + 824: 11a0a005 movne sl, r5 + 828: 1affffeb bne 7dc <printint+0x3c> + }while((x = y) != 0); + if(neg) + 82c: e3530000 cmp r3, #0 + buf[i++] = '-'; + 830: 124b2024 subne r2, fp, #36 ; 0x24 + 834: 10823005 addne r3, r2, r5 + 838: 128a5002 addne r5, sl, #2 + + while(--i >= 0) + 83c: e2455001 sub r5, r5, #1 + do{ + y = div(x, b); + buf[i++] = digits[x - y * b]; + }while((x = y) != 0); + if(neg) + buf[i++] = '-'; + 840: 13a0202d movne r2, #45 ; 0x2d + 844: 15432010 strbne r2, [r3, #-16] + + while(--i >= 0) + putc(fd, buf[i]); + 848: e7d61005 ldrb r1, [r6, r5] + 84c: e1a00004 mov r0, r4 + buf[i++] = digits[x - y * b]; + }while((x = y) != 0); + if(neg) + buf[i++] = '-'; + + while(--i >= 0) + 850: e2455001 sub r5, r5, #1 + putc(fd, buf[i]); + 854: ebffffc7 bl 778 <putc> + buf[i++] = digits[x - y * b]; + }while((x = y) != 0); + if(neg) + buf[i++] = '-'; + + while(--i >= 0) + 858: e3750001 cmn r5, #1 + 85c: 1afffff9 bne 848 <printint+0xa8> + putc(fd, buf[i]); +} + 860: e24bd020 sub sp, fp, #32 + 864: e8bd8ff0 pop {r4, r5, r6, r7, r8, r9, sl, fp, pc} + 868: 00000bc8 .word 0x00000bc8 + +0000086c <div>: + write(fd, &c, 1); +} + +u32 div(u32 n, u32 d) // long division +{ + u32 q=0, r=0; + 86c: e3a03000 mov r3, #0 +{ + write(fd, &c, 1); +} + +u32 div(u32 n, u32 d) // long division +{ + 870: e92d0830 push {r4, r5, fp} + 874: e1a02000 mov r2, r0 + 878: e28db008 add fp, sp, #8 + u32 q=0, r=0; + int i; + + for(i=31;i>=0;i--){ + 87c: e3a0c01f mov ip, #31 + write(fd, &c, 1); +} + +u32 div(u32 n, u32 d) // long division +{ + u32 q=0, r=0; + 880: e1a00003 mov r0, r3 + for(i=31;i>=0;i--){ + r = r << 1; + r = r | ((n >> i) & 1); + if(r >= d) { + r = r - d; + q = q | (1 << i); + 884: e3a05001 mov r5, #1 + u32 q=0, r=0; + int i; + + for(i=31;i>=0;i--){ + r = r << 1; + r = r | ((n >> i) & 1); + 888: e1a04c32 lsr r4, r2, ip + 88c: e2044001 and r4, r4, #1 + 890: e1843083 orr r3, r4, r3, lsl #1 + if(r >= d) { + 894: e1530001 cmp r3, r1 + r = r - d; + q = q | (1 << i); + 898: 21800c15 orrcs r0, r0, r5, lsl ip + + for(i=31;i>=0;i--){ + r = r << 1; + r = r | ((n >> i) & 1); + if(r >= d) { + r = r - d; + 89c: 20613003 rsbcs r3, r1, r3 +u32 div(u32 n, u32 d) // long division +{ + u32 q=0, r=0; + int i; + + for(i=31;i>=0;i--){ + 8a0: e25cc001 subs ip, ip, #1 + 8a4: 2afffff7 bcs 888 <div+0x1c> + r = r - d; + q = q | (1 << i); + } + } + return q; +} + 8a8: e24bd008 sub sp, fp, #8 + 8ac: e8bd0830 pop {r4, r5, fp} + 8b0: e12fff1e bx lr + +000008b4 <printf>: +} + +// Print to the given fd. Only understands %d, %x, %p, %s. +void +printf(int fd, char *fmt, ...) +{ + 8b4: e92d000e push {r1, r2, r3} + 8b8: e92d4ff0 push {r4, r5, r6, r7, r8, r9, sl, fp, lr} + 8bc: e28db020 add fp, sp, #32 + 8c0: e1a05000 mov r5, r0 + int c, i, state; + uint *ap; + + state = 0; + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + 8c4: e59b4004 ldr r4, [fp, #4] + 8c8: e5d48000 ldrb r8, [r4] + 8cc: e3580000 cmp r8, #0 + 8d0: 0a000027 beq 974 <printf+0xc0> + ap++; + } else if(c == 's'){ + s = (char*)*ap; + ap++; + if(s == 0) + s = "(null)"; + 8d4: e59f712c ldr r7, [pc, #300] ; a08 <printf+0x154> + char *s; + int c, i, state; + uint *ap; + + state = 0; + ap = (uint*)(void*)&fmt + 1; + 8d8: e28b6008 add r6, fp, #8 +{ + char *s; + int c, i, state; + uint *ap; + + state = 0; + 8dc: e3a0a000 mov sl, #0 + 8e0: ea000008 b 908 <printf+0x54> + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + c = fmt[i] & 0xff; + if(state == 0){ + if(c == '%'){ + 8e4: e3580025 cmp r8, #37 ; 0x25 + state = '%'; + 8e8: 01a0a008 moveq sl, r8 + state = 0; + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + c = fmt[i] & 0xff; + if(state == 0){ + if(c == '%'){ + 8ec: 0a000002 beq 8fc <printf+0x48> + state = '%'; + } else { + putc(fd, c); + 8f0: e1a00005 mov r0, r5 + 8f4: e1a01008 mov r1, r8 + 8f8: ebffff9e bl 778 <putc> + int c, i, state; + uint *ap; + + state = 0; + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + 8fc: e5f48001 ldrb r8, [r4, #1]! + 900: e3580000 cmp r8, #0 + 904: 0a00001a beq 974 <printf+0xc0> + c = fmt[i] & 0xff; + if(state == 0){ + 908: e35a0000 cmp sl, #0 + 90c: 0afffff4 beq 8e4 <printf+0x30> + if(c == '%'){ + state = '%'; + } else { + putc(fd, c); + } + } else if(state == '%'){ + 910: e35a0025 cmp sl, #37 ; 0x25 + 914: 1afffff8 bne 8fc <printf+0x48> + if(c == 'd'){ + 918: e3580064 cmp r8, #100 ; 0x64 + 91c: 0a00002c beq 9d4 <printf+0x120> + printint(fd, *ap, 10, 1); + ap++; + } else if(c == 'x' || c == 'p'){ + 920: e3580078 cmp r8, #120 ; 0x78 + 924: 13580070 cmpne r8, #112 ; 0x70 + 928: 13a09000 movne r9, #0 + 92c: 03a09001 moveq r9, #1 + 930: 0a000013 beq 984 <printf+0xd0> + printint(fd, *ap, 16, 0); + ap++; + } else if(c == 's'){ + 934: e3580073 cmp r8, #115 ; 0x73 + 938: 0a000018 beq 9a0 <printf+0xec> + s = "(null)"; + while(*s != 0){ + putc(fd, *s); + s++; + } + } else if(c == 'c'){ + 93c: e3580063 cmp r8, #99 ; 0x63 + 940: 0a00002a beq 9f0 <printf+0x13c> + putc(fd, *ap); + ap++; + } else if(c == '%'){ + 944: e3580025 cmp r8, #37 ; 0x25 + putc(fd, c); + 948: e1a0100a mov r1, sl + 94c: e1a00005 mov r0, r5 + s++; + } + } else if(c == 'c'){ + putc(fd, *ap); + ap++; + } else if(c == '%'){ + 950: 0a000002 beq 960 <printf+0xac> + putc(fd, c); + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + 954: ebffff87 bl 778 <putc> + putc(fd, c); + 958: e1a00005 mov r0, r5 + 95c: e1a01008 mov r1, r8 + 960: ebffff84 bl 778 <putc> + int c, i, state; + uint *ap; + + state = 0; + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + 964: e5f48001 ldrb r8, [r4, #1]! + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + putc(fd, c); + } + state = 0; + 968: e1a0a009 mov sl, r9 + int c, i, state; + uint *ap; + + state = 0; + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + 96c: e3580000 cmp r8, #0 + 970: 1affffe4 bne 908 <printf+0x54> + putc(fd, c); + } + state = 0; + } + } +} + 974: e24bd020 sub sp, fp, #32 + 978: e8bd4ff0 pop {r4, r5, r6, r7, r8, r9, sl, fp, lr} + 97c: e28dd00c add sp, sp, #12 + 980: e12fff1e bx lr + } else if(state == '%'){ + if(c == 'd'){ + printint(fd, *ap, 10, 1); + ap++; + } else if(c == 'x' || c == 'p'){ + printint(fd, *ap, 16, 0); + 984: e1a00005 mov r0, r5 + 988: e4961004 ldr r1, [r6], #4 + 98c: e3a02010 mov r2, #16 + 990: e3a03000 mov r3, #0 + 994: ebffff81 bl 7a0 <printint> + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + putc(fd, c); + } + state = 0; + 998: e3a0a000 mov sl, #0 + 99c: eaffffd6 b 8fc <printf+0x48> + ap++; + } else if(c == 'x' || c == 'p'){ + printint(fd, *ap, 16, 0); + ap++; + } else if(c == 's'){ + s = (char*)*ap; + 9a0: e4968004 ldr r8, [r6], #4 + ap++; + if(s == 0) + s = "(null)"; + 9a4: e3580000 cmp r8, #0 + 9a8: 01a08007 moveq r8, r7 + while(*s != 0){ + 9ac: e5d81000 ldrb r1, [r8] + 9b0: e3510000 cmp r1, #0 + 9b4: 0a000004 beq 9cc <printf+0x118> + putc(fd, *s); + 9b8: e1a00005 mov r0, r5 + 9bc: ebffff6d bl 778 <putc> + } else if(c == 's'){ + s = (char*)*ap; + ap++; + if(s == 0) + s = "(null)"; + while(*s != 0){ + 9c0: e5f81001 ldrb r1, [r8, #1]! + 9c4: e3510000 cmp r1, #0 + 9c8: 1afffffa bne 9b8 <printf+0x104> + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + putc(fd, c); + } + state = 0; + 9cc: e1a0a001 mov sl, r1 + 9d0: eaffffc9 b 8fc <printf+0x48> + } else { + putc(fd, c); + } + } else if(state == '%'){ + if(c == 'd'){ + printint(fd, *ap, 10, 1); + 9d4: e1a00005 mov r0, r5 + 9d8: e4961004 ldr r1, [r6], #4 + 9dc: e3a0200a mov r2, #10 + 9e0: e3a03001 mov r3, #1 + 9e4: ebffff6d bl 7a0 <printint> + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + putc(fd, c); + } + state = 0; + 9e8: e3a0a000 mov sl, #0 + 9ec: eaffffc2 b 8fc <printf+0x48> + while(*s != 0){ + putc(fd, *s); + s++; + } + } else if(c == 'c'){ + putc(fd, *ap); + 9f0: e4961004 ldr r1, [r6], #4 + 9f4: e1a00005 mov r0, r5 + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + putc(fd, c); + } + state = 0; + 9f8: e1a0a009 mov sl, r9 + while(*s != 0){ + putc(fd, *s); + s++; + } + } else if(c == 'c'){ + putc(fd, *ap); + 9fc: e6ef1071 uxtb r1, r1 + a00: ebffff5c bl 778 <putc> + a04: eaffffbc b 8fc <printf+0x48> + a08: 00000bdc .word 0x00000bdc + +00000a0c <free>: +free(void *ap) +{ + Header *bp, *p; + + bp = (Header*)ap - 1; + for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) + a0c: e59f3098 ldr r3, [pc, #152] ; aac <free+0xa0> +static Header base; +static Header *freep; + +void +free(void *ap) +{ + a10: e92d0830 push {r4, r5, fp} + Header *bp, *p; + + bp = (Header*)ap - 1; + a14: e240c008 sub ip, r0, #8 + for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) + a18: e5932000 ldr r2, [r3] +static Header base; +static Header *freep; + +void +free(void *ap) +{ + a1c: e28db008 add fp, sp, #8 + Header *bp, *p; + + bp = (Header*)ap - 1; + for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) + a20: e152000c cmp r2, ip + a24: e5921000 ldr r1, [r2] + a28: 2a000001 bcs a34 <free+0x28> + a2c: e15c0001 cmp ip, r1 + a30: 3a000007 bcc a54 <free+0x48> + if(p >= p->s.ptr && (bp > p || bp < p->s.ptr)) + a34: e1520001 cmp r2, r1 + a38: 3a000003 bcc a4c <free+0x40> + a3c: e152000c cmp r2, ip + a40: 3a000003 bcc a54 <free+0x48> + a44: e15c0001 cmp ip, r1 + a48: 3a000001 bcc a54 <free+0x48> +static Header base; +static Header *freep; + +void +free(void *ap) +{ + a4c: e1a02001 mov r2, r1 + a50: eafffff2 b a20 <free+0x14> + + bp = (Header*)ap - 1; + for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) + if(p >= p->s.ptr && (bp > p || bp < p->s.ptr)) + break; + if(bp + bp->s.size == p->s.ptr){ + a54: e5104004 ldr r4, [r0, #-4] + if(p + p->s.size == bp){ + p->s.size += bp->s.size; + p->s.ptr = bp->s.ptr; + } else + p->s.ptr = bp; + freep = p; + a58: e5832000 str r2, [r3] + + bp = (Header*)ap - 1; + for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) + if(p >= p->s.ptr && (bp > p || bp < p->s.ptr)) + break; + if(bp + bp->s.size == p->s.ptr){ + a5c: e08c5184 add r5, ip, r4, lsl #3 + a60: e1550001 cmp r5, r1 + bp->s.size += p->s.ptr->s.size; + a64: 05911004 ldreq r1, [r1, #4] + a68: 00814004 addeq r4, r1, r4 + a6c: 05004004 streq r4, [r0, #-4] + bp->s.ptr = p->s.ptr->s.ptr; + a70: 05921000 ldreq r1, [r2] + a74: 05911000 ldreq r1, [r1] + } else + bp->s.ptr = p->s.ptr; + a78: e5001008 str r1, [r0, #-8] + if(p + p->s.size == bp){ + a7c: e5921004 ldr r1, [r2, #4] + a80: e0824181 add r4, r2, r1, lsl #3 + a84: e15c0004 cmp ip, r4 + p->s.size += bp->s.size; + p->s.ptr = bp->s.ptr; + } else + p->s.ptr = bp; + a88: 1582c000 strne ip, [r2] + bp->s.size += p->s.ptr->s.size; + bp->s.ptr = p->s.ptr->s.ptr; + } else + bp->s.ptr = p->s.ptr; + if(p + p->s.size == bp){ + p->s.size += bp->s.size; + a8c: 0510c004 ldreq ip, [r0, #-4] + a90: 008c1001 addeq r1, ip, r1 + a94: 05821004 streq r1, [r2, #4] + p->s.ptr = bp->s.ptr; + a98: 05101008 ldreq r1, [r0, #-8] + a9c: 05821000 streq r1, [r2] + } else + p->s.ptr = bp; + freep = p; +} + aa0: e24bd008 sub sp, fp, #8 + aa4: e8bd0830 pop {r4, r5, fp} + aa8: e12fff1e bx lr + aac: 00000be4 .word 0x00000be4 + +00000ab0 <malloc>: + return freep; +} + +void* +malloc(uint nbytes) +{ + ab0: e92d49f8 push {r3, r4, r5, r6, r7, r8, fp, lr} + Header *p, *prevp; + uint nunits; + + nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1; + ab4: e2804007 add r4, r0, #7 + if((prevp = freep) == 0){ + ab8: e59f50d4 ldr r5, [pc, #212] ; b94 <malloc+0xe4> +malloc(uint nbytes) +{ + Header *p, *prevp; + uint nunits; + + nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1; + abc: e1a041a4 lsr r4, r4, #3 + return freep; +} + +void* +malloc(uint nbytes) +{ + ac0: e28db01c add fp, sp, #28 + Header *p, *prevp; + uint nunits; + + nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1; + if((prevp = freep) == 0){ + ac4: e5953000 ldr r3, [r5] +malloc(uint nbytes) +{ + Header *p, *prevp; + uint nunits; + + nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1; + ac8: e2844001 add r4, r4, #1 + if((prevp = freep) == 0){ + acc: e3530000 cmp r3, #0 + ad0: 0a00002b beq b84 <malloc+0xd4> + ad4: e5930000 ldr r0, [r3] + ad8: e5902004 ldr r2, [r0, #4] + base.s.ptr = freep = prevp = &base; + base.s.size = 0; + } + for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){ + if(p->s.size >= nunits){ + adc: e1520004 cmp r2, r4 + ae0: 2a00001b bcs b54 <malloc+0xa4> +morecore(uint nu) +{ + char *p; + Header *hp; + + if(nu < 4096) + ae4: e59f80ac ldr r8, [pc, #172] ; b98 <malloc+0xe8> + p->s.size -= nunits; + p += p->s.size; + p->s.size = nunits; + } + freep = prevp; + return (void*)(p + 1); + ae8: e1a07184 lsl r7, r4, #3 + aec: ea000003 b b00 <malloc+0x50> + nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1; + if((prevp = freep) == 0){ + base.s.ptr = freep = prevp = &base; + base.s.size = 0; + } + for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){ + af0: e5930000 ldr r0, [r3] + if(p->s.size >= nunits){ + af4: e5902004 ldr r2, [r0, #4] + af8: e1540002 cmp r4, r2 + afc: 9a000014 bls b54 <malloc+0xa4> + p->s.size = nunits; + } + freep = prevp; + return (void*)(p + 1); + } + if(p == freep) + b00: e5952000 ldr r2, [r5] + b04: e1a03000 mov r3, r0 + b08: e1500002 cmp r0, r2 + b0c: 1afffff7 bne af0 <malloc+0x40> +morecore(uint nu) +{ + char *p; + Header *hp; + + if(nu < 4096) + b10: e1540008 cmp r4, r8 + nu = 4096; + p = sbrk(nu * sizeof(Header)); + b14: 81a00007 movhi r0, r7 + b18: 93a00902 movls r0, #32768 ; 0x8000 +morecore(uint nu) +{ + char *p; + Header *hp; + + if(nu < 4096) + b1c: 81a06004 movhi r6, r4 + b20: 93a06a01 movls r6, #4096 ; 0x1000 + nu = 4096; + p = sbrk(nu * sizeof(Header)); + b24: ebfffeec bl 6dc <sbrk> + b28: e1a03000 mov r3, r0 + if(p == (char*)-1) + b2c: e3730001 cmn r3, #1 + return 0; + hp = (Header*)p; + hp->s.size = nu; + free((void*)(hp + 1)); + b30: e2800008 add r0, r0, #8 + Header *hp; + + if(nu < 4096) + nu = 4096; + p = sbrk(nu * sizeof(Header)); + if(p == (char*)-1) + b34: 0a000010 beq b7c <malloc+0xcc> + return 0; + hp = (Header*)p; + hp->s.size = nu; + b38: e5836004 str r6, [r3, #4] + free((void*)(hp + 1)); + b3c: ebffffb2 bl a0c <free> + return freep; + b40: e5953000 ldr r3, [r5] + } + freep = prevp; + return (void*)(p + 1); + } + if(p == freep) + if((p = morecore(nunits)) == 0) + b44: e3530000 cmp r3, #0 + b48: 1affffe8 bne af0 <malloc+0x40> + return 0; + b4c: e1a00003 mov r0, r3 + } +} + b50: e8bd89f8 pop {r3, r4, r5, r6, r7, r8, fp, pc} + base.s.ptr = freep = prevp = &base; + base.s.size = 0; + } + for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){ + if(p->s.size >= nunits){ + if(p->s.size == nunits) + b54: e1540002 cmp r4, r2 + prevp->s.ptr = p->s.ptr; + else { + p->s.size -= nunits; + b58: 10642002 rsbne r2, r4, r2 + b5c: 15802004 strne r2, [r0, #4] + base.s.size = 0; + } + for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){ + if(p->s.size >= nunits){ + if(p->s.size == nunits) + prevp->s.ptr = p->s.ptr; + b60: 05902000 ldreq r2, [r0] + else { + p->s.size -= nunits; + p += p->s.size; + b64: 10800182 addne r0, r0, r2, lsl #3 + base.s.size = 0; + } + for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){ + if(p->s.size >= nunits){ + if(p->s.size == nunits) + prevp->s.ptr = p->s.ptr; + b68: 05832000 streq r2, [r3] + else { + p->s.size -= nunits; + p += p->s.size; + p->s.size = nunits; + b6c: 15804004 strne r4, [r0, #4] + } + freep = prevp; + b70: e5853000 str r3, [r5] + return (void*)(p + 1); + b74: e2800008 add r0, r0, #8 + b78: e8bd89f8 pop {r3, r4, r5, r6, r7, r8, fp, pc} + } + if(p == freep) + if((p = morecore(nunits)) == 0) + return 0; + b7c: e3a00000 mov r0, #0 + b80: e8bd89f8 pop {r3, r4, r5, r6, r7, r8, fp, pc} + Header *p, *prevp; + uint nunits; + + nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1; + if((prevp = freep) == 0){ + base.s.ptr = freep = prevp = &base; + b84: e2850004 add r0, r5, #4 + b88: e5850000 str r0, [r5] + base.s.size = 0; + b8c: e9850009 stmib r5, {r0, r3} + b90: eaffffd3 b ae4 <malloc+0x34> + b94: 00000be4 .word 0x00000be4 + b98: 00000fff .word 0x00000fff