Mercurial > hg > Members > innparusu > xv6_rpi_port
diff uprogs/init.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/init.asm Sun Oct 22 18:25:39 2017 +0900 @@ -0,0 +1,1731 @@ + +_init: file format elf32-littlearm + + +Disassembly of section .text: + +00000000 <main>: + +char *argv[] = { "sh", 0 }; + +int +main(void) +{ + 0: e92d4818 push {r3, r4, fp, lr} + int pid, wpid; + + if(open("console", O_RDWR) < 0){ + 4: e3a01002 mov r1, #2 + +char *argv[] = { "sh", 0 }; + +int +main(void) +{ + 8: e28db00c add fp, sp, #12 + int pid, wpid; + + if(open("console", O_RDWR) < 0){ + c: e59f00a4 ldr r0, [pc, #164] ; b8 <main+0xb8> + 10: eb00013f bl 514 <open> + 14: e3500000 cmp r0, #0 + 18: ba00001e blt 98 <main+0x98> + mknod("console", 1, 1); + open("console", O_RDWR); + } + dup(0); // stdout + 1c: e3a00000 mov r0, #0 + 20: eb000196 bl 680 <dup> + dup(0); // stderr + 24: e3a00000 mov r0, #0 + 28: eb000194 bl 680 <dup> + + for(;;){ + printf(1, "init: starting sh\n"); + 2c: e3a00001 mov r0, #1 + 30: e59f1084 ldr r1, [pc, #132] ; bc <main+0xbc> + 34: eb000221 bl 8c0 <printf> + pid = fork(); + 38: eb0000c0 bl 340 <fork> + if(pid < 0){ + 3c: e2504000 subs r4, r0, #0 + 40: ba000009 blt 6c <main+0x6c> + printf(1, "init: fork failed\n"); + exit(); + } + if(pid == 0){ + 44: 0a00000c beq 7c <main+0x7c> + exec("sh", argv); + printf(1, "init: exec sh failed\n"); + exit(); + } + while((wpid=wait()) >= 0 && wpid != pid) + 48: eb0000d6 bl 3a8 <wait> + 4c: e3500000 cmp r0, #0 + 50: bafffff5 blt 2c <main+0x2c> + 54: e1500004 cmp r0, r4 + 58: 0afffff3 beq 2c <main+0x2c> + printf(1, "zombie!\n"); + 5c: e3a00001 mov r0, #1 + 60: e59f1058 ldr r1, [pc, #88] ; c0 <main+0xc0> + 64: eb000215 bl 8c0 <printf> + 68: eafffff6 b 48 <main+0x48> + + for(;;){ + printf(1, "init: starting sh\n"); + pid = fork(); + if(pid < 0){ + printf(1, "init: fork failed\n"); + 6c: e3a00001 mov r0, #1 + 70: e59f104c ldr r1, [pc, #76] ; c4 <main+0xc4> + 74: eb000211 bl 8c0 <printf> + exit(); + 78: eb0000bd bl 374 <exit> + } + if(pid == 0){ + exec("sh", argv); + 7c: e59f1044 ldr r1, [pc, #68] ; c8 <main+0xc8> + 80: e59f0044 ldr r0, [pc, #68] ; cc <main+0xcc> + 84: eb000115 bl 4e0 <exec> + printf(1, "init: exec sh failed\n"); + 88: e3a00001 mov r0, #1 + 8c: e59f103c ldr r1, [pc, #60] ; d0 <main+0xd0> + 90: eb00020a bl 8c0 <printf> + exit(); + 94: eb0000b6 bl 374 <exit> +main(void) +{ + int pid, wpid; + + if(open("console", O_RDWR) < 0){ + mknod("console", 1, 1); + 98: e3a01001 mov r1, #1 + 9c: e1a02001 mov r2, r1 + a0: e59f0010 ldr r0, [pc, #16] ; b8 <main+0xb8> + a4: eb000127 bl 548 <mknod> + open("console", O_RDWR); + a8: e3a01002 mov r1, #2 + ac: e59f0004 ldr r0, [pc, #4] ; b8 <main+0xb8> + b0: eb000117 bl 514 <open> + b4: eaffffd8 b 1c <main+0x1c> + b8: 00000ba8 .word 0x00000ba8 + bc: 00000bb0 .word 0x00000bb0 + c0: 00000bf4 .word 0x00000bf4 + c4: 00000bc4 .word 0x00000bc4 + c8: 00000c1c .word 0x00000c1c + cc: 00000bd8 .word 0x00000bd8 + d0: 00000bdc .word 0x00000bdc + +000000d4 <strcpy>: +#include "user.h" +#include "arm.h" + +char* +strcpy(char *s, char *t) +{ + d4: e52db004 push {fp} ; (str fp, [sp, #-4]!) + char *os; + + os = s; + while((*s++ = *t++) != 0) + d8: e1a02000 mov r2, r0 +#include "user.h" +#include "arm.h" + +char* +strcpy(char *s, char *t) +{ + dc: e28db000 add fp, sp, #0 + char *os; + + os = s; + while((*s++ = *t++) != 0) + e0: e4d13001 ldrb r3, [r1], #1 + e4: e3530000 cmp r3, #0 + e8: e4c23001 strb r3, [r2], #1 + ec: 1afffffb bne e0 <strcpy+0xc> + ; + return os; +} + f0: e28bd000 add sp, fp, #0 + f4: e8bd0800 pop {fp} + f8: e12fff1e bx lr + +000000fc <strcmp>: + +int +strcmp(const char *p, const char *q) +{ + fc: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 100: e28db000 add fp, sp, #0 + while(*p && *p == *q) + 104: e5d03000 ldrb r3, [r0] + 108: e5d12000 ldrb r2, [r1] + 10c: e3530000 cmp r3, #0 + 110: 1a000004 bne 128 <strcmp+0x2c> + 114: ea000005 b 130 <strcmp+0x34> + 118: e5f03001 ldrb r3, [r0, #1]! + 11c: e3530000 cmp r3, #0 + 120: 0a000006 beq 140 <strcmp+0x44> + 124: e5f12001 ldrb r2, [r1, #1]! + 128: e1530002 cmp r3, r2 + 12c: 0afffff9 beq 118 <strcmp+0x1c> + p++, q++; + return (uchar)*p - (uchar)*q; +} + 130: e0620003 rsb r0, r2, r3 + 134: e28bd000 add sp, fp, #0 + 138: e8bd0800 pop {fp} + 13c: e12fff1e bx lr +} + +int +strcmp(const char *p, const char *q) +{ + while(*p && *p == *q) + 140: e5d12001 ldrb r2, [r1, #1] + 144: eafffff9 b 130 <strcmp+0x34> + +00000148 <strlen>: + return (uchar)*p - (uchar)*q; +} + +uint +strlen(char *s) +{ + 148: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 14c: e28db000 add fp, sp, #0 + int n; + + for(n = 0; s[n]; n++) + 150: e5d03000 ldrb r3, [r0] + 154: e3530000 cmp r3, #0 + 158: 01a00003 moveq r0, r3 + 15c: 0a000006 beq 17c <strlen+0x34> + 160: e1a02000 mov r2, r0 + 164: e3a03000 mov r3, #0 + 168: e5f21001 ldrb r1, [r2, #1]! + 16c: e2833001 add r3, r3, #1 + 170: e1a00003 mov r0, r3 + 174: e3510000 cmp r1, #0 + 178: 1afffffa bne 168 <strlen+0x20> + ; + return n; +} + 17c: e28bd000 add sp, fp, #0 + 180: e8bd0800 pop {fp} + 184: e12fff1e bx lr + +00000188 <memset>: +memset(void *dst, int c, uint n) +{ + char *p=dst; + u32 rc=n; + + while (rc-- > 0) *p++ = c; + 188: e3520000 cmp r2, #0 + return n; +} + +void* +memset(void *dst, int c, uint n) +{ + 18c: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 190: e28db000 add fp, sp, #0 + char *p=dst; + u32 rc=n; + + while (rc-- > 0) *p++ = c; + 194: 0a000006 beq 1b4 <memset+0x2c> + 198: e6ef1071 uxtb r1, r1 + 19c: e1a03002 mov r3, r2 +} + +void* +memset(void *dst, int c, uint n) +{ + char *p=dst; + 1a0: e1a0c000 mov ip, r0 + u32 rc=n; + + while (rc-- > 0) *p++ = c; + 1a4: e2533001 subs r3, r3, #1 + 1a8: e4cc1001 strb r1, [ip], #1 + 1ac: 1afffffc bne 1a4 <memset+0x1c> + 1b0: e0800002 add r0, r0, r2 + return (void *)p; +} + 1b4: e28bd000 add sp, fp, #0 + 1b8: e8bd0800 pop {fp} + 1bc: e12fff1e bx lr + +000001c0 <strchr>: + +char* +strchr(const char *s, char c) +{ + 1c0: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 1c4: e28db000 add fp, sp, #0 + for(; *s; s++) + 1c8: e5d03000 ldrb r3, [r0] + 1cc: e3530000 cmp r3, #0 + 1d0: 1a000004 bne 1e8 <strchr+0x28> + 1d4: ea000008 b 1fc <strchr+0x3c> + 1d8: e5d03001 ldrb r3, [r0, #1] + 1dc: e2800001 add r0, r0, #1 + 1e0: e3530000 cmp r3, #0 + 1e4: 0a000004 beq 1fc <strchr+0x3c> + if(*s == c) + 1e8: e1530001 cmp r3, r1 + 1ec: 1afffff9 bne 1d8 <strchr+0x18> + return (char*)s; + return 0; +} + 1f0: e28bd000 add sp, fp, #0 + 1f4: e8bd0800 pop {fp} + 1f8: e12fff1e bx lr +strchr(const char *s, char c) +{ + for(; *s; s++) + if(*s == c) + return (char*)s; + return 0; + 1fc: e1a00003 mov r0, r3 + 200: eafffffa b 1f0 <strchr+0x30> + +00000204 <gets>: +} + +char* +gets(char *buf, int max) +{ + 204: e92d49f0 push {r4, r5, r6, r7, r8, fp, lr} + 208: e28db018 add fp, sp, #24 + 20c: e24dd00c sub sp, sp, #12 + 210: e1a08000 mov r8, r0 + 214: e1a07001 mov r7, r1 + int i, cc; + char c; + + for(i=0; i+1 < max; ){ + 218: e1a06000 mov r6, r0 + 21c: e3a05000 mov r5, #0 + 220: ea000008 b 248 <gets+0x44> + cc = read(0, &c, 1); + 224: eb000079 bl 410 <read> + if(cc < 1) + 228: e3500000 cmp r0, #0 + 22c: da00000b ble 260 <gets+0x5c> + break; + buf[i++] = c; + 230: e55b301d ldrb r3, [fp, #-29] + if(c == '\n' || c == '\r') + 234: e1a05004 mov r5, r4 + 238: e353000a cmp r3, #10 + 23c: 1353000d cmpne r3, #13 + + for(i=0; i+1 < max; ){ + cc = read(0, &c, 1); + if(cc < 1) + break; + buf[i++] = c; + 240: e4c63001 strb r3, [r6], #1 + if(c == '\n' || c == '\r') + 244: 0a00000a beq 274 <gets+0x70> +{ + int i, cc; + char c; + + for(i=0; i+1 < max; ){ + cc = read(0, &c, 1); + 248: e3a02001 mov r2, #1 +gets(char *buf, int max) +{ + int i, cc; + char c; + + for(i=0; i+1 < max; ){ + 24c: e0854002 add r4, r5, r2 + 250: e1540007 cmp r4, r7 + cc = read(0, &c, 1); + 254: e3a00000 mov r0, #0 + 258: e24b101d sub r1, fp, #29 +gets(char *buf, int max) +{ + int i, cc; + char c; + + for(i=0; i+1 < max; ){ + 25c: bafffff0 blt 224 <gets+0x20> + break; + buf[i++] = c; + if(c == '\n' || c == '\r') + break; + } + buf[i] = '\0'; + 260: e3a03000 mov r3, #0 + 264: e7c83005 strb r3, [r8, r5] + return buf; +} + 268: e1a00008 mov r0, r8 + 26c: e24bd018 sub sp, fp, #24 + 270: 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; ){ + 274: e1a05004 mov r5, r4 + 278: eafffff8 b 260 <gets+0x5c> + +0000027c <stat>: + return buf; +} + +int +stat(char *n, struct stat *st) +{ + 27c: e92d4830 push {r4, r5, fp, lr} + 280: e1a05001 mov r5, r1 + 284: e28db00c add fp, sp, #12 + int fd; + int r; + + fd = open(n, O_RDONLY); + 288: e3a01000 mov r1, #0 + 28c: eb0000a0 bl 514 <open> + if(fd < 0) + 290: e2504000 subs r4, r0, #0 + return -1; + 294: b3e05000 mvnlt r5, #0 +{ + int fd; + int r; + + fd = open(n, O_RDONLY); + if(fd < 0) + 298: ba000004 blt 2b0 <stat+0x34> + return -1; + r = fstat(fd, st); + 29c: e1a01005 mov r1, r5 + 2a0: eb0000c2 bl 5b0 <fstat> + 2a4: e1a05000 mov r5, r0 + close(fd); + 2a8: e1a00004 mov r0, r4 + 2ac: eb000071 bl 478 <close> + return r; +} + 2b0: e1a00005 mov r0, r5 + 2b4: e8bd8830 pop {r4, r5, fp, pc} + +000002b8 <atoi>: + +int +atoi(const char *s) +{ + 2b8: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 2bc: e28db000 add fp, sp, #0 + int n; + + n = 0; + while('0' <= *s && *s <= '9') + 2c0: e5d03000 ldrb r3, [r0] + 2c4: e2432030 sub r2, r3, #48 ; 0x30 + 2c8: e6ef2072 uxtb r2, r2 + 2cc: e3520009 cmp r2, #9 +int +atoi(const char *s) +{ + int n; + + n = 0; + 2d0: 83a00000 movhi r0, #0 + while('0' <= *s && *s <= '9') + 2d4: 8a000009 bhi 300 <atoi+0x48> + 2d8: e1a02000 mov r2, r0 +int +atoi(const char *s) +{ + int n; + + n = 0; + 2dc: e3a00000 mov r0, #0 + while('0' <= *s && *s <= '9') + n = n*10 + *s++ - '0'; + 2e0: e0800100 add r0, r0, r0, lsl #2 + 2e4: e0830080 add r0, r3, r0, lsl #1 +atoi(const char *s) +{ + int n; + + n = 0; + while('0' <= *s && *s <= '9') + 2e8: e5f23001 ldrb r3, [r2, #1]! + n = n*10 + *s++ - '0'; + 2ec: e2400030 sub r0, r0, #48 ; 0x30 +atoi(const char *s) +{ + int n; + + n = 0; + while('0' <= *s && *s <= '9') + 2f0: e2431030 sub r1, r3, #48 ; 0x30 + 2f4: e6ef1071 uxtb r1, r1 + 2f8: e3510009 cmp r1, #9 + 2fc: 9afffff7 bls 2e0 <atoi+0x28> + n = n*10 + *s++ - '0'; + return n; +} + 300: e28bd000 add sp, fp, #0 + 304: e8bd0800 pop {fp} + 308: e12fff1e bx lr + +0000030c <memmove>: +{ + char *dst, *src; + + dst = vdst; + src = vsrc; + while(n-- > 0) + 30c: e3520000 cmp r2, #0 + return n; +} + +void* +memmove(void *vdst, void *vsrc, int n) +{ + 310: e52db004 push {fp} ; (str fp, [sp, #-4]!) + 314: e28db000 add fp, sp, #0 + char *dst, *src; + + dst = vdst; + src = vsrc; + while(n-- > 0) + 318: da000005 ble 334 <memmove+0x28> + n = n*10 + *s++ - '0'; + return n; +} + +void* +memmove(void *vdst, void *vsrc, int n) + 31c: e0802002 add r2, r0, r2 +{ + char *dst, *src; + + dst = vdst; + 320: e1a03000 mov r3, r0 + src = vsrc; + while(n-- > 0) + *dst++ = *src++; + 324: e4d1c001 ldrb ip, [r1], #1 + 328: e4c3c001 strb ip, [r3], #1 +{ + char *dst, *src; + + dst = vdst; + src = vsrc; + while(n-- > 0) + 32c: e1530002 cmp r3, r2 + 330: 1afffffb bne 324 <memmove+0x18> + *dst++ = *src++; + return vdst; +} + 334: e28bd000 add sp, fp, #0 + 338: e8bd0800 pop {fp} + 33c: e12fff1e bx lr + +00000340 <fork>: + 340: e92d4000 push {lr} + 344: e92d0008 push {r3} + 348: e92d0004 push {r2} + 34c: e92d0002 push {r1} + 350: e92d0001 push {r0} + 354: e3a00001 mov r0, #1 + 358: ef000040 svc 0x00000040 + 35c: e8bd0002 pop {r1} + 360: e8bd0002 pop {r1} + 364: e8bd0004 pop {r2} + 368: e8bd0008 pop {r3} + 36c: e8bd4000 pop {lr} + 370: e12fff1e bx lr + +00000374 <exit>: + 374: e92d4000 push {lr} + 378: e92d0008 push {r3} + 37c: e92d0004 push {r2} + 380: e92d0002 push {r1} + 384: e92d0001 push {r0} + 388: e3a00002 mov r0, #2 + 38c: ef000040 svc 0x00000040 + 390: e8bd0002 pop {r1} + 394: e8bd0002 pop {r1} + 398: e8bd0004 pop {r2} + 39c: e8bd0008 pop {r3} + 3a0: e8bd4000 pop {lr} + 3a4: e12fff1e bx lr + +000003a8 <wait>: + 3a8: e92d4000 push {lr} + 3ac: e92d0008 push {r3} + 3b0: e92d0004 push {r2} + 3b4: e92d0002 push {r1} + 3b8: e92d0001 push {r0} + 3bc: e3a00003 mov r0, #3 + 3c0: ef000040 svc 0x00000040 + 3c4: e8bd0002 pop {r1} + 3c8: e8bd0002 pop {r1} + 3cc: e8bd0004 pop {r2} + 3d0: e8bd0008 pop {r3} + 3d4: e8bd4000 pop {lr} + 3d8: e12fff1e bx lr + +000003dc <pipe>: + 3dc: e92d4000 push {lr} + 3e0: e92d0008 push {r3} + 3e4: e92d0004 push {r2} + 3e8: e92d0002 push {r1} + 3ec: e92d0001 push {r0} + 3f0: e3a00004 mov r0, #4 + 3f4: ef000040 svc 0x00000040 + 3f8: e8bd0002 pop {r1} + 3fc: e8bd0002 pop {r1} + 400: e8bd0004 pop {r2} + 404: e8bd0008 pop {r3} + 408: e8bd4000 pop {lr} + 40c: e12fff1e bx lr + +00000410 <read>: + 410: e92d4000 push {lr} + 414: e92d0008 push {r3} + 418: e92d0004 push {r2} + 41c: e92d0002 push {r1} + 420: e92d0001 push {r0} + 424: e3a00005 mov r0, #5 + 428: ef000040 svc 0x00000040 + 42c: e8bd0002 pop {r1} + 430: e8bd0002 pop {r1} + 434: e8bd0004 pop {r2} + 438: e8bd0008 pop {r3} + 43c: e8bd4000 pop {lr} + 440: e12fff1e bx lr + +00000444 <write>: + 444: e92d4000 push {lr} + 448: e92d0008 push {r3} + 44c: e92d0004 push {r2} + 450: e92d0002 push {r1} + 454: e92d0001 push {r0} + 458: e3a00010 mov r0, #16 + 45c: ef000040 svc 0x00000040 + 460: e8bd0002 pop {r1} + 464: e8bd0002 pop {r1} + 468: e8bd0004 pop {r2} + 46c: e8bd0008 pop {r3} + 470: e8bd4000 pop {lr} + 474: e12fff1e bx lr + +00000478 <close>: + 478: e92d4000 push {lr} + 47c: e92d0008 push {r3} + 480: e92d0004 push {r2} + 484: e92d0002 push {r1} + 488: e92d0001 push {r0} + 48c: e3a00015 mov r0, #21 + 490: ef000040 svc 0x00000040 + 494: e8bd0002 pop {r1} + 498: e8bd0002 pop {r1} + 49c: e8bd0004 pop {r2} + 4a0: e8bd0008 pop {r3} + 4a4: e8bd4000 pop {lr} + 4a8: e12fff1e bx lr + +000004ac <kill>: + 4ac: e92d4000 push {lr} + 4b0: e92d0008 push {r3} + 4b4: e92d0004 push {r2} + 4b8: e92d0002 push {r1} + 4bc: e92d0001 push {r0} + 4c0: e3a00006 mov r0, #6 + 4c4: ef000040 svc 0x00000040 + 4c8: e8bd0002 pop {r1} + 4cc: e8bd0002 pop {r1} + 4d0: e8bd0004 pop {r2} + 4d4: e8bd0008 pop {r3} + 4d8: e8bd4000 pop {lr} + 4dc: e12fff1e bx lr + +000004e0 <exec>: + 4e0: e92d4000 push {lr} + 4e4: e92d0008 push {r3} + 4e8: e92d0004 push {r2} + 4ec: e92d0002 push {r1} + 4f0: e92d0001 push {r0} + 4f4: e3a00007 mov r0, #7 + 4f8: ef000040 svc 0x00000040 + 4fc: e8bd0002 pop {r1} + 500: e8bd0002 pop {r1} + 504: e8bd0004 pop {r2} + 508: e8bd0008 pop {r3} + 50c: e8bd4000 pop {lr} + 510: e12fff1e bx lr + +00000514 <open>: + 514: e92d4000 push {lr} + 518: e92d0008 push {r3} + 51c: e92d0004 push {r2} + 520: e92d0002 push {r1} + 524: e92d0001 push {r0} + 528: e3a0000f mov r0, #15 + 52c: ef000040 svc 0x00000040 + 530: e8bd0002 pop {r1} + 534: e8bd0002 pop {r1} + 538: e8bd0004 pop {r2} + 53c: e8bd0008 pop {r3} + 540: e8bd4000 pop {lr} + 544: e12fff1e bx lr + +00000548 <mknod>: + 548: e92d4000 push {lr} + 54c: e92d0008 push {r3} + 550: e92d0004 push {r2} + 554: e92d0002 push {r1} + 558: e92d0001 push {r0} + 55c: e3a00011 mov r0, #17 + 560: ef000040 svc 0x00000040 + 564: e8bd0002 pop {r1} + 568: e8bd0002 pop {r1} + 56c: e8bd0004 pop {r2} + 570: e8bd0008 pop {r3} + 574: e8bd4000 pop {lr} + 578: e12fff1e bx lr + +0000057c <unlink>: + 57c: e92d4000 push {lr} + 580: e92d0008 push {r3} + 584: e92d0004 push {r2} + 588: e92d0002 push {r1} + 58c: e92d0001 push {r0} + 590: e3a00012 mov r0, #18 + 594: ef000040 svc 0x00000040 + 598: e8bd0002 pop {r1} + 59c: e8bd0002 pop {r1} + 5a0: e8bd0004 pop {r2} + 5a4: e8bd0008 pop {r3} + 5a8: e8bd4000 pop {lr} + 5ac: e12fff1e bx lr + +000005b0 <fstat>: + 5b0: e92d4000 push {lr} + 5b4: e92d0008 push {r3} + 5b8: e92d0004 push {r2} + 5bc: e92d0002 push {r1} + 5c0: e92d0001 push {r0} + 5c4: e3a00008 mov r0, #8 + 5c8: ef000040 svc 0x00000040 + 5cc: e8bd0002 pop {r1} + 5d0: e8bd0002 pop {r1} + 5d4: e8bd0004 pop {r2} + 5d8: e8bd0008 pop {r3} + 5dc: e8bd4000 pop {lr} + 5e0: e12fff1e bx lr + +000005e4 <link>: + 5e4: e92d4000 push {lr} + 5e8: e92d0008 push {r3} + 5ec: e92d0004 push {r2} + 5f0: e92d0002 push {r1} + 5f4: e92d0001 push {r0} + 5f8: e3a00013 mov r0, #19 + 5fc: ef000040 svc 0x00000040 + 600: e8bd0002 pop {r1} + 604: e8bd0002 pop {r1} + 608: e8bd0004 pop {r2} + 60c: e8bd0008 pop {r3} + 610: e8bd4000 pop {lr} + 614: e12fff1e bx lr + +00000618 <mkdir>: + 618: e92d4000 push {lr} + 61c: e92d0008 push {r3} + 620: e92d0004 push {r2} + 624: e92d0002 push {r1} + 628: e92d0001 push {r0} + 62c: e3a00014 mov r0, #20 + 630: ef000040 svc 0x00000040 + 634: e8bd0002 pop {r1} + 638: e8bd0002 pop {r1} + 63c: e8bd0004 pop {r2} + 640: e8bd0008 pop {r3} + 644: e8bd4000 pop {lr} + 648: e12fff1e bx lr + +0000064c <chdir>: + 64c: e92d4000 push {lr} + 650: e92d0008 push {r3} + 654: e92d0004 push {r2} + 658: e92d0002 push {r1} + 65c: e92d0001 push {r0} + 660: e3a00009 mov r0, #9 + 664: ef000040 svc 0x00000040 + 668: e8bd0002 pop {r1} + 66c: e8bd0002 pop {r1} + 670: e8bd0004 pop {r2} + 674: e8bd0008 pop {r3} + 678: e8bd4000 pop {lr} + 67c: e12fff1e bx lr + +00000680 <dup>: + 680: e92d4000 push {lr} + 684: e92d0008 push {r3} + 688: e92d0004 push {r2} + 68c: e92d0002 push {r1} + 690: e92d0001 push {r0} + 694: e3a0000a mov r0, #10 + 698: ef000040 svc 0x00000040 + 69c: e8bd0002 pop {r1} + 6a0: e8bd0002 pop {r1} + 6a4: e8bd0004 pop {r2} + 6a8: e8bd0008 pop {r3} + 6ac: e8bd4000 pop {lr} + 6b0: e12fff1e bx lr + +000006b4 <getpid>: + 6b4: e92d4000 push {lr} + 6b8: e92d0008 push {r3} + 6bc: e92d0004 push {r2} + 6c0: e92d0002 push {r1} + 6c4: e92d0001 push {r0} + 6c8: e3a0000b mov r0, #11 + 6cc: ef000040 svc 0x00000040 + 6d0: e8bd0002 pop {r1} + 6d4: e8bd0002 pop {r1} + 6d8: e8bd0004 pop {r2} + 6dc: e8bd0008 pop {r3} + 6e0: e8bd4000 pop {lr} + 6e4: e12fff1e bx lr + +000006e8 <sbrk>: + 6e8: e92d4000 push {lr} + 6ec: e92d0008 push {r3} + 6f0: e92d0004 push {r2} + 6f4: e92d0002 push {r1} + 6f8: e92d0001 push {r0} + 6fc: e3a0000c mov r0, #12 + 700: ef000040 svc 0x00000040 + 704: e8bd0002 pop {r1} + 708: e8bd0002 pop {r1} + 70c: e8bd0004 pop {r2} + 710: e8bd0008 pop {r3} + 714: e8bd4000 pop {lr} + 718: e12fff1e bx lr + +0000071c <sleep>: + 71c: e92d4000 push {lr} + 720: e92d0008 push {r3} + 724: e92d0004 push {r2} + 728: e92d0002 push {r1} + 72c: e92d0001 push {r0} + 730: e3a0000d mov r0, #13 + 734: ef000040 svc 0x00000040 + 738: e8bd0002 pop {r1} + 73c: e8bd0002 pop {r1} + 740: e8bd0004 pop {r2} + 744: e8bd0008 pop {r3} + 748: e8bd4000 pop {lr} + 74c: e12fff1e bx lr + +00000750 <uptime>: + 750: e92d4000 push {lr} + 754: e92d0008 push {r3} + 758: e92d0004 push {r2} + 75c: e92d0002 push {r1} + 760: e92d0001 push {r0} + 764: e3a0000e mov r0, #14 + 768: ef000040 svc 0x00000040 + 76c: e8bd0002 pop {r1} + 770: e8bd0002 pop {r1} + 774: e8bd0004 pop {r2} + 778: e8bd0008 pop {r3} + 77c: e8bd4000 pop {lr} + 780: e12fff1e bx lr + +00000784 <putc>: +#include "stat.h" +#include "user.h" + +static void +putc(int fd, char c) +{ + 784: e92d4800 push {fp, lr} + 788: e28db004 add fp, sp, #4 + 78c: e24b3004 sub r3, fp, #4 + 790: e24dd008 sub sp, sp, #8 + write(fd, &c, 1); + 794: e3a02001 mov r2, #1 +#include "stat.h" +#include "user.h" + +static void +putc(int fd, char c) +{ + 798: e5631001 strb r1, [r3, #-1]! + write(fd, &c, 1); + 79c: e1a01003 mov r1, r3 + 7a0: ebffff27 bl 444 <write> +} + 7a4: e24bd004 sub sp, fp, #4 + 7a8: e8bd8800 pop {fp, pc} + +000007ac <printint>: + return q; +} + +static void +printint(int fd, int xx, int base, int sgn) +{ + 7ac: e92d4ff0 push {r4, r5, r6, r7, r8, r9, sl, fp, lr} + 7b0: e1a04000 mov r4, r0 + char buf[16]; + int i, neg; + uint x, y, b; + + neg = 0; + if(sgn && xx < 0){ + 7b4: e1a00fa1 lsr r0, r1, #31 + 7b8: e3530000 cmp r3, #0 + 7bc: 03a03000 moveq r3, #0 + 7c0: 12003001 andne r3, r0, #1 + return q; +} + +static void +printint(int fd, int xx, int base, int sgn) +{ + 7c4: e28db020 add fp, sp, #32 + char buf[16]; + int i, neg; + uint x, y, b; + + neg = 0; + if(sgn && xx < 0){ + 7c8: e3530000 cmp r3, #0 + return q; +} + +static void +printint(int fd, int xx, int base, int sgn) +{ + 7cc: e24dd014 sub sp, sp, #20 + 7d0: e59f909c ldr r9, [pc, #156] ; 874 <printint+0xc8> + uint x, y, b; + + neg = 0; + if(sgn && xx < 0){ + neg = 1; + x = -xx; + 7d4: 12611000 rsbne r1, r1, #0 + int i, neg; + uint x, y, b; + + neg = 0; + if(sgn && xx < 0){ + neg = 1; + 7d8: 13a03001 movne r3, #1 + } else { + x = xx; + } + + b = base; + i = 0; + 7dc: e3a0a000 mov sl, #0 + 7e0: 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); + 7e4: e3a08001 mov r8, #1 + write(fd, &c, 1); +} + +u32 div(u32 n, u32 d) // long division +{ + u32 q=0, r=0; + 7e8: e3a07000 mov r7, #0 + int i; + + for(i=31;i>=0;i--){ + 7ec: e3a0001f mov r0, #31 + write(fd, &c, 1); +} + +u32 div(u32 n, u32 d) // long division +{ + u32 q=0, r=0; + 7f0: e1a0c007 mov ip, r7 + int i; + + for(i=31;i>=0;i--){ + r = r << 1; + r = r | ((n >> i) & 1); + 7f4: e1a0e031 lsr lr, r1, r0 + 7f8: e20ee001 and lr, lr, #1 + 7fc: e18ec08c orr ip, lr, ip, lsl #1 + if(r >= d) { + 800: e152000c cmp r2, ip + r = r - d; + q = q | (1 << i); + 804: 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; + 808: 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--){ + 80c: e2500001 subs r0, r0, #1 + 810: 2afffff7 bcs 7f4 <printint+0x48> + + b = base; + i = 0; + do{ + y = div(x, b); + buf[i++] = digits[x - y * b]; + 814: e0000792 mul r0, r2, r7 + }while((x = y) != 0); + 818: e3570000 cmp r7, #0 + + b = base; + i = 0; + do{ + y = div(x, b); + buf[i++] = digits[x - y * b]; + 81c: e0601001 rsb r1, r0, r1 + 820: e28a5001 add r5, sl, #1 + 824: e7d91001 ldrb r1, [r9, r1] + 828: e7c6100a strb r1, [r6, sl] + }while((x = y) != 0); + 82c: 11a01007 movne r1, r7 + + b = base; + i = 0; + do{ + y = div(x, b); + buf[i++] = digits[x - y * b]; + 830: 11a0a005 movne sl, r5 + 834: 1affffeb bne 7e8 <printint+0x3c> + }while((x = y) != 0); + if(neg) + 838: e3530000 cmp r3, #0 + buf[i++] = '-'; + 83c: 124b2024 subne r2, fp, #36 ; 0x24 + 840: 10823005 addne r3, r2, r5 + 844: 128a5002 addne r5, sl, #2 + + while(--i >= 0) + 848: e2455001 sub r5, r5, #1 + do{ + y = div(x, b); + buf[i++] = digits[x - y * b]; + }while((x = y) != 0); + if(neg) + buf[i++] = '-'; + 84c: 13a0202d movne r2, #45 ; 0x2d + 850: 15432010 strbne r2, [r3, #-16] + + while(--i >= 0) + putc(fd, buf[i]); + 854: e7d61005 ldrb r1, [r6, r5] + 858: e1a00004 mov r0, r4 + buf[i++] = digits[x - y * b]; + }while((x = y) != 0); + if(neg) + buf[i++] = '-'; + + while(--i >= 0) + 85c: e2455001 sub r5, r5, #1 + putc(fd, buf[i]); + 860: ebffffc7 bl 784 <putc> + buf[i++] = digits[x - y * b]; + }while((x = y) != 0); + if(neg) + buf[i++] = '-'; + + while(--i >= 0) + 864: e3750001 cmn r5, #1 + 868: 1afffff9 bne 854 <printint+0xa8> + putc(fd, buf[i]); +} + 86c: e24bd020 sub sp, fp, #32 + 870: e8bd8ff0 pop {r4, r5, r6, r7, r8, r9, sl, fp, pc} + 874: 00000c00 .word 0x00000c00 + +00000878 <div>: + write(fd, &c, 1); +} + +u32 div(u32 n, u32 d) // long division +{ + u32 q=0, r=0; + 878: e3a03000 mov r3, #0 +{ + write(fd, &c, 1); +} + +u32 div(u32 n, u32 d) // long division +{ + 87c: e92d0830 push {r4, r5, fp} + 880: e1a02000 mov r2, r0 + 884: e28db008 add fp, sp, #8 + u32 q=0, r=0; + int i; + + for(i=31;i>=0;i--){ + 888: e3a0c01f mov ip, #31 + write(fd, &c, 1); +} + +u32 div(u32 n, u32 d) // long division +{ + u32 q=0, r=0; + 88c: 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); + 890: 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); + 894: e1a04c32 lsr r4, r2, ip + 898: e2044001 and r4, r4, #1 + 89c: e1843083 orr r3, r4, r3, lsl #1 + if(r >= d) { + 8a0: e1530001 cmp r3, r1 + r = r - d; + q = q | (1 << i); + 8a4: 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; + 8a8: 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--){ + 8ac: e25cc001 subs ip, ip, #1 + 8b0: 2afffff7 bcs 894 <div+0x1c> + r = r - d; + q = q | (1 << i); + } + } + return q; +} + 8b4: e24bd008 sub sp, fp, #8 + 8b8: e8bd0830 pop {r4, r5, fp} + 8bc: e12fff1e bx lr + +000008c0 <printf>: +} + +// Print to the given fd. Only understands %d, %x, %p, %s. +void +printf(int fd, char *fmt, ...) +{ + 8c0: e92d000e push {r1, r2, r3} + 8c4: e92d4ff0 push {r4, r5, r6, r7, r8, r9, sl, fp, lr} + 8c8: e28db020 add fp, sp, #32 + 8cc: e1a05000 mov r5, r0 + int c, i, state; + uint *ap; + + state = 0; + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + 8d0: e59b4004 ldr r4, [fp, #4] + 8d4: e5d48000 ldrb r8, [r4] + 8d8: e3580000 cmp r8, #0 + 8dc: 0a000027 beq 980 <printf+0xc0> + ap++; + } else if(c == 's'){ + s = (char*)*ap; + ap++; + if(s == 0) + s = "(null)"; + 8e0: e59f712c ldr r7, [pc, #300] ; a14 <printf+0x154> + char *s; + int c, i, state; + uint *ap; + + state = 0; + ap = (uint*)(void*)&fmt + 1; + 8e4: e28b6008 add r6, fp, #8 +{ + char *s; + int c, i, state; + uint *ap; + + state = 0; + 8e8: e3a0a000 mov sl, #0 + 8ec: ea000008 b 914 <printf+0x54> + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + c = fmt[i] & 0xff; + if(state == 0){ + if(c == '%'){ + 8f0: e3580025 cmp r8, #37 ; 0x25 + state = '%'; + 8f4: 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 == '%'){ + 8f8: 0a000002 beq 908 <printf+0x48> + state = '%'; + } else { + putc(fd, c); + 8fc: e1a00005 mov r0, r5 + 900: e1a01008 mov r1, r8 + 904: ebffff9e bl 784 <putc> + int c, i, state; + uint *ap; + + state = 0; + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + 908: e5f48001 ldrb r8, [r4, #1]! + 90c: e3580000 cmp r8, #0 + 910: 0a00001a beq 980 <printf+0xc0> + c = fmt[i] & 0xff; + if(state == 0){ + 914: e35a0000 cmp sl, #0 + 918: 0afffff4 beq 8f0 <printf+0x30> + if(c == '%'){ + state = '%'; + } else { + putc(fd, c); + } + } else if(state == '%'){ + 91c: e35a0025 cmp sl, #37 ; 0x25 + 920: 1afffff8 bne 908 <printf+0x48> + if(c == 'd'){ + 924: e3580064 cmp r8, #100 ; 0x64 + 928: 0a00002c beq 9e0 <printf+0x120> + printint(fd, *ap, 10, 1); + ap++; + } else if(c == 'x' || c == 'p'){ + 92c: e3580078 cmp r8, #120 ; 0x78 + 930: 13580070 cmpne r8, #112 ; 0x70 + 934: 13a09000 movne r9, #0 + 938: 03a09001 moveq r9, #1 + 93c: 0a000013 beq 990 <printf+0xd0> + printint(fd, *ap, 16, 0); + ap++; + } else if(c == 's'){ + 940: e3580073 cmp r8, #115 ; 0x73 + 944: 0a000018 beq 9ac <printf+0xec> + s = "(null)"; + while(*s != 0){ + putc(fd, *s); + s++; + } + } else if(c == 'c'){ + 948: e3580063 cmp r8, #99 ; 0x63 + 94c: 0a00002a beq 9fc <printf+0x13c> + putc(fd, *ap); + ap++; + } else if(c == '%'){ + 950: e3580025 cmp r8, #37 ; 0x25 + putc(fd, c); + 954: e1a0100a mov r1, sl + 958: e1a00005 mov r0, r5 + s++; + } + } else if(c == 'c'){ + putc(fd, *ap); + ap++; + } else if(c == '%'){ + 95c: 0a000002 beq 96c <printf+0xac> + putc(fd, c); + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + 960: ebffff87 bl 784 <putc> + putc(fd, c); + 964: e1a00005 mov r0, r5 + 968: e1a01008 mov r1, r8 + 96c: ebffff84 bl 784 <putc> + int c, i, state; + uint *ap; + + state = 0; + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + 970: e5f48001 ldrb r8, [r4, #1]! + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + putc(fd, c); + } + state = 0; + 974: e1a0a009 mov sl, r9 + int c, i, state; + uint *ap; + + state = 0; + ap = (uint*)(void*)&fmt + 1; + for(i = 0; fmt[i]; i++){ + 978: e3580000 cmp r8, #0 + 97c: 1affffe4 bne 914 <printf+0x54> + putc(fd, c); + } + state = 0; + } + } +} + 980: e24bd020 sub sp, fp, #32 + 984: e8bd4ff0 pop {r4, r5, r6, r7, r8, r9, sl, fp, lr} + 988: e28dd00c add sp, sp, #12 + 98c: 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); + 990: e1a00005 mov r0, r5 + 994: e4961004 ldr r1, [r6], #4 + 998: e3a02010 mov r2, #16 + 99c: e3a03000 mov r3, #0 + 9a0: ebffff81 bl 7ac <printint> + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + putc(fd, c); + } + state = 0; + 9a4: e3a0a000 mov sl, #0 + 9a8: eaffffd6 b 908 <printf+0x48> + ap++; + } else if(c == 'x' || c == 'p'){ + printint(fd, *ap, 16, 0); + ap++; + } else if(c == 's'){ + s = (char*)*ap; + 9ac: e4968004 ldr r8, [r6], #4 + ap++; + if(s == 0) + s = "(null)"; + 9b0: e3580000 cmp r8, #0 + 9b4: 01a08007 moveq r8, r7 + while(*s != 0){ + 9b8: e5d81000 ldrb r1, [r8] + 9bc: e3510000 cmp r1, #0 + 9c0: 0a000004 beq 9d8 <printf+0x118> + putc(fd, *s); + 9c4: e1a00005 mov r0, r5 + 9c8: ebffff6d bl 784 <putc> + } else if(c == 's'){ + s = (char*)*ap; + ap++; + if(s == 0) + s = "(null)"; + while(*s != 0){ + 9cc: e5f81001 ldrb r1, [r8, #1]! + 9d0: e3510000 cmp r1, #0 + 9d4: 1afffffa bne 9c4 <printf+0x104> + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + putc(fd, c); + } + state = 0; + 9d8: e1a0a001 mov sl, r1 + 9dc: eaffffc9 b 908 <printf+0x48> + } else { + putc(fd, c); + } + } else if(state == '%'){ + if(c == 'd'){ + printint(fd, *ap, 10, 1); + 9e0: e1a00005 mov r0, r5 + 9e4: e4961004 ldr r1, [r6], #4 + 9e8: e3a0200a mov r2, #10 + 9ec: e3a03001 mov r3, #1 + 9f0: ebffff6d bl 7ac <printint> + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + putc(fd, c); + } + state = 0; + 9f4: e3a0a000 mov sl, #0 + 9f8: eaffffc2 b 908 <printf+0x48> + while(*s != 0){ + putc(fd, *s); + s++; + } + } else if(c == 'c'){ + putc(fd, *ap); + 9fc: e4961004 ldr r1, [r6], #4 + a00: e1a00005 mov r0, r5 + } else { + // Unknown % sequence. Print it to draw attention. + putc(fd, '%'); + putc(fd, c); + } + state = 0; + a04: e1a0a009 mov sl, r9 + while(*s != 0){ + putc(fd, *s); + s++; + } + } else if(c == 'c'){ + putc(fd, *ap); + a08: e6ef1071 uxtb r1, r1 + a0c: ebffff5c bl 784 <putc> + a10: eaffffbc b 908 <printf+0x48> + a14: 00000c14 .word 0x00000c14 + +00000a18 <free>: +free(void *ap) +{ + Header *bp, *p; + + bp = (Header*)ap - 1; + for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) + a18: e59f3098 ldr r3, [pc, #152] ; ab8 <free+0xa0> +static Header base; +static Header *freep; + +void +free(void *ap) +{ + a1c: e92d0830 push {r4, r5, fp} + Header *bp, *p; + + bp = (Header*)ap - 1; + a20: e240c008 sub ip, r0, #8 + for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) + a24: e5932000 ldr r2, [r3] +static Header base; +static Header *freep; + +void +free(void *ap) +{ + a28: 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) + a2c: e152000c cmp r2, ip + a30: e5921000 ldr r1, [r2] + a34: 2a000001 bcs a40 <free+0x28> + a38: e15c0001 cmp ip, r1 + a3c: 3a000007 bcc a60 <free+0x48> + if(p >= p->s.ptr && (bp > p || bp < p->s.ptr)) + a40: e1520001 cmp r2, r1 + a44: 3a000003 bcc a58 <free+0x40> + a48: e152000c cmp r2, ip + a4c: 3a000003 bcc a60 <free+0x48> + a50: e15c0001 cmp ip, r1 + a54: 3a000001 bcc a60 <free+0x48> +static Header base; +static Header *freep; + +void +free(void *ap) +{ + a58: e1a02001 mov r2, r1 + a5c: eafffff2 b a2c <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){ + a60: 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; + a64: 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){ + a68: e08c5184 add r5, ip, r4, lsl #3 + a6c: e1550001 cmp r5, r1 + bp->s.size += p->s.ptr->s.size; + a70: 05911004 ldreq r1, [r1, #4] + a74: 00814004 addeq r4, r1, r4 + a78: 05004004 streq r4, [r0, #-4] + bp->s.ptr = p->s.ptr->s.ptr; + a7c: 05921000 ldreq r1, [r2] + a80: 05911000 ldreq r1, [r1] + } else + bp->s.ptr = p->s.ptr; + a84: e5001008 str r1, [r0, #-8] + if(p + p->s.size == bp){ + a88: e5921004 ldr r1, [r2, #4] + a8c: e0824181 add r4, r2, r1, lsl #3 + a90: e15c0004 cmp ip, r4 + p->s.size += bp->s.size; + p->s.ptr = bp->s.ptr; + } else + p->s.ptr = bp; + a94: 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; + a98: 0510c004 ldreq ip, [r0, #-4] + a9c: 008c1001 addeq r1, ip, r1 + aa0: 05821004 streq r1, [r2, #4] + p->s.ptr = bp->s.ptr; + aa4: 05101008 ldreq r1, [r0, #-8] + aa8: 05821000 streq r1, [r2] + } else + p->s.ptr = bp; + freep = p; +} + aac: e24bd008 sub sp, fp, #8 + ab0: e8bd0830 pop {r4, r5, fp} + ab4: e12fff1e bx lr + ab8: 00000c24 .word 0x00000c24 + +00000abc <malloc>: + return freep; +} + +void* +malloc(uint nbytes) +{ + abc: e92d49f8 push {r3, r4, r5, r6, r7, r8, fp, lr} + Header *p, *prevp; + uint nunits; + + nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1; + ac0: e2804007 add r4, r0, #7 + if((prevp = freep) == 0){ + ac4: e59f50d4 ldr r5, [pc, #212] ; ba0 <malloc+0xe4> +malloc(uint nbytes) +{ + Header *p, *prevp; + uint nunits; + + nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1; + ac8: e1a041a4 lsr r4, r4, #3 + return freep; +} + +void* +malloc(uint nbytes) +{ + acc: e28db01c add fp, sp, #28 + Header *p, *prevp; + uint nunits; + + nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1; + if((prevp = freep) == 0){ + ad0: e5953000 ldr r3, [r5] +malloc(uint nbytes) +{ + Header *p, *prevp; + uint nunits; + + nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1; + ad4: e2844001 add r4, r4, #1 + if((prevp = freep) == 0){ + ad8: e3530000 cmp r3, #0 + adc: 0a00002b beq b90 <malloc+0xd4> + ae0: e5930000 ldr r0, [r3] + ae4: 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){ + ae8: e1520004 cmp r2, r4 + aec: 2a00001b bcs b60 <malloc+0xa4> +morecore(uint nu) +{ + char *p; + Header *hp; + + if(nu < 4096) + af0: e59f80ac ldr r8, [pc, #172] ; ba4 <malloc+0xe8> + p->s.size -= nunits; + p += p->s.size; + p->s.size = nunits; + } + freep = prevp; + return (void*)(p + 1); + af4: e1a07184 lsl r7, r4, #3 + af8: ea000003 b b0c <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){ + afc: e5930000 ldr r0, [r3] + if(p->s.size >= nunits){ + b00: e5902004 ldr r2, [r0, #4] + b04: e1540002 cmp r4, r2 + b08: 9a000014 bls b60 <malloc+0xa4> + p->s.size = nunits; + } + freep = prevp; + return (void*)(p + 1); + } + if(p == freep) + b0c: e5952000 ldr r2, [r5] + b10: e1a03000 mov r3, r0 + b14: e1500002 cmp r0, r2 + b18: 1afffff7 bne afc <malloc+0x40> +morecore(uint nu) +{ + char *p; + Header *hp; + + if(nu < 4096) + b1c: e1540008 cmp r4, r8 + nu = 4096; + p = sbrk(nu * sizeof(Header)); + b20: 81a00007 movhi r0, r7 + b24: 93a00902 movls r0, #32768 ; 0x8000 +morecore(uint nu) +{ + char *p; + Header *hp; + + if(nu < 4096) + b28: 81a06004 movhi r6, r4 + b2c: 93a06a01 movls r6, #4096 ; 0x1000 + nu = 4096; + p = sbrk(nu * sizeof(Header)); + b30: ebfffeec bl 6e8 <sbrk> + b34: e1a03000 mov r3, r0 + if(p == (char*)-1) + b38: e3730001 cmn r3, #1 + return 0; + hp = (Header*)p; + hp->s.size = nu; + free((void*)(hp + 1)); + b3c: e2800008 add r0, r0, #8 + Header *hp; + + if(nu < 4096) + nu = 4096; + p = sbrk(nu * sizeof(Header)); + if(p == (char*)-1) + b40: 0a000010 beq b88 <malloc+0xcc> + return 0; + hp = (Header*)p; + hp->s.size = nu; + b44: e5836004 str r6, [r3, #4] + free((void*)(hp + 1)); + b48: ebffffb2 bl a18 <free> + return freep; + b4c: e5953000 ldr r3, [r5] + } + freep = prevp; + return (void*)(p + 1); + } + if(p == freep) + if((p = morecore(nunits)) == 0) + b50: e3530000 cmp r3, #0 + b54: 1affffe8 bne afc <malloc+0x40> + return 0; + b58: e1a00003 mov r0, r3 + } +} + b5c: 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) + b60: e1540002 cmp r4, r2 + prevp->s.ptr = p->s.ptr; + else { + p->s.size -= nunits; + b64: 10642002 rsbne r2, r4, r2 + b68: 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; + b6c: 05902000 ldreq r2, [r0] + else { + p->s.size -= nunits; + p += p->s.size; + b70: 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; + b74: 05832000 streq r2, [r3] + else { + p->s.size -= nunits; + p += p->s.size; + p->s.size = nunits; + b78: 15804004 strne r4, [r0, #4] + } + freep = prevp; + b7c: e5853000 str r3, [r5] + return (void*)(p + 1); + b80: e2800008 add r0, r0, #8 + b84: e8bd89f8 pop {r3, r4, r5, r6, r7, r8, fp, pc} + } + if(p == freep) + if((p = morecore(nunits)) == 0) + return 0; + b88: e3a00000 mov r0, #0 + b8c: 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; + b90: e2850004 add r0, r5, #4 + b94: e5850000 str r0, [r5] + base.s.size = 0; + b98: e9850009 stmib r5, {r0, r3} + b9c: eaffffd3 b af0 <malloc+0x34> + ba0: 00000c24 .word 0x00000c24 + ba4: 00000fff .word 0x00000fff