--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uprogs/ls.asm	Sun Oct 22 18:25:39 2017 +0900
@@ -0,0 +1,1997 @@
+
+_ls:     file format elf32-littlearm
+
+
+Disassembly of section .text:
+
+00000000 <main>:
+int
+main(int argc, char *argv[])
+{
+  int i;
+
+  if(argc < 2){
+   0:	e3500001 	cmp	r0, #1
+  close(fd);
+}
+
+int
+main(int argc, char *argv[])
+{
+   4:	e92d4878 	push	{r3, r4, r5, r6, fp, lr}
+   8:	e1a04000 	mov	r4, r0
+   c:	e28db014 	add	fp, sp, #20
+  int i;
+
+  if(argc < 2){
+    ls(".");
+    exit();
+  10:	c1a06001 	movgt	r6, r1
+int
+main(int argc, char *argv[])
+{
+  int i;
+
+  if(argc < 2){
+  14:	c3a05001 	movgt	r5, #1
+  18:	da000005 	ble	34 <main+0x34>
+    ls(".");
+    exit();
+  }
+  for(i=1; i<argc; i++)
+    ls(argv[i]);
+  1c:	e5b60004 	ldr	r0, [r6, #4]!
+
+  if(argc < 2){
+    ls(".");
+    exit();
+  }
+  for(i=1; i<argc; i++)
+  20:	e2855001 	add	r5, r5, #1
+    ls(argv[i]);
+  24:	eb000030 	bl	ec <ls>
+
+  if(argc < 2){
+    ls(".");
+    exit();
+  }
+  for(i=1; i<argc; i++)
+  28:	e1550004 	cmp	r5, r4
+  2c:	1afffffa 	bne	1c <main+0x1c>
+    ls(argv[i]);
+  exit();
+  30:	eb00013e 	bl	530 <exit>
+main(int argc, char *argv[])
+{
+  int i;
+
+  if(argc < 2){
+    ls(".");
+  34:	e59f0004 	ldr	r0, [pc, #4]	; 40 <main+0x40>
+  38:	eb00002b 	bl	ec <ls>
+    exit();
+  3c:	eb00013b 	bl	530 <exit>
+  40:	00000db0 	.word	0x00000db0
+
+00000044 <fmtname>:
+#include "user.h"
+#include "fs.h"
+
+char*
+fmtname(char *path)
+{
+  44:	e92d4878 	push	{r3, r4, r5, r6, fp, lr}
+  48:	e28db014 	add	fp, sp, #20
+  4c:	e1a05000 	mov	r5, r0
+  static char buf[DIRSIZ+1];
+  char *p;
+  
+  // Find first character after last slash.
+  for(p=path+strlen(path); p >= path && *p != '/'; p--)
+  50:	eb0000ab 	bl	304 <strlen>
+  54:	e0954000 	adds	r4, r5, r0
+  58:	2a00000a 	bcs	88 <fmtname+0x44>
+  5c:	e7d53000 	ldrb	r3, [r5, r0]
+  60:	e353002f 	cmp	r3, #47	; 0x2f
+  64:	0a000007 	beq	88 <fmtname+0x44>
+  68:	e1a03004 	mov	r3, r4
+  6c:	ea000002 	b	7c <fmtname+0x38>
+  70:	e5732001 	ldrb	r2, [r3, #-1]!
+  74:	e352002f 	cmp	r2, #47	; 0x2f
+  78:	0a000002 	beq	88 <fmtname+0x44>
+  7c:	e2444001 	sub	r4, r4, #1
+  80:	e1550004 	cmp	r5, r4
+  84:	9afffff9 	bls	70 <fmtname+0x2c>
+    ;
+  p++;
+  88:	e2844001 	add	r4, r4, #1
+  
+  // Return blank-padded name.
+  if(strlen(p) >= DIRSIZ)
+  8c:	e1a00004 	mov	r0, r4
+  90:	eb00009b 	bl	304 <strlen>
+  94:	e350000d 	cmp	r0, #13
+  98:	8a000010 	bhi	e0 <fmtname+0x9c>
+    return p;
+  memmove(buf, p, strlen(p));
+  9c:	e1a00004 	mov	r0, r4
+  a0:	eb000097 	bl	304 <strlen>
+  a4:	e59f503c 	ldr	r5, [pc, #60]	; e8 <fmtname+0xa4>
+  a8:	e1a01004 	mov	r1, r4
+  ac:	e1a02000 	mov	r2, r0
+  b0:	e1a00005 	mov	r0, r5
+  b4:	eb000103 	bl	4c8 <memmove>
+  memset(buf+strlen(p), ' ', DIRSIZ-strlen(p));
+  b8:	e1a00004 	mov	r0, r4
+  bc:	eb000090 	bl	304 <strlen>
+  c0:	e1a06000 	mov	r6, r0
+  c4:	e1a00004 	mov	r0, r4
+  c8:	eb00008d 	bl	304 <strlen>
+  cc:	e3a01020 	mov	r1, #32
+  return buf;
+  d0:	e1a04005 	mov	r4, r5
+  
+  // Return blank-padded name.
+  if(strlen(p) >= DIRSIZ)
+    return p;
+  memmove(buf, p, strlen(p));
+  memset(buf+strlen(p), ' ', DIRSIZ-strlen(p));
+  d4:	e260200e 	rsb	r2, r0, #14
+  d8:	e0850006 	add	r0, r5, r6
+  dc:	eb000098 	bl	344 <memset>
+  return buf;
+}
+  e0:	e1a00004 	mov	r0, r4
+  e4:	e8bd8878 	pop	{r3, r4, r5, r6, fp, pc}
+  e8:	00000dd0 	.word	0x00000dd0
+
+000000ec <ls>:
+
+void
+ls(char *path)
+{
+  ec:	e92d49f0 	push	{r4, r5, r6, r7, r8, fp, lr}
+  f0:	e28db018 	add	fp, sp, #24
+  f4:	e24ddf8d 	sub	sp, sp, #564	; 0x234
+  char buf[512], *p;
+  int fd;
+  struct dirent de;
+  struct stat st;
+  
+  if((fd = open(path, 0)) < 0){
+  f8:	e3a01000 	mov	r1, #0
+  return buf;
+}
+
+void
+ls(char *path)
+{
+  fc:	e1a06000 	mov	r6, r0
+  char buf[512], *p;
+  int fd;
+  struct dirent de;
+  struct stat st;
+  
+  if((fd = open(path, 0)) < 0){
+ 100:	eb000172 	bl	6d0 <open>
+ 104:	e2504000 	subs	r4, r0, #0
+ 108:	ba00004b 	blt	23c <ls+0x150>
+    printf(2, "ls: cannot open %s\n", path);
+    return;
+  }
+  
+  if(fstat(fd, &st) < 0){
+ 10c:	e24b1040 	sub	r1, fp, #64	; 0x40
+ 110:	eb000195 	bl	76c <fstat>
+ 114:	e3500000 	cmp	r0, #0
+ 118:	ba000051 	blt	264 <ls+0x178>
+    printf(2, "ls: cannot stat %s\n", path);
+    close(fd);
+    return;
+  }
+  
+  switch(st.type){
+ 11c:	e15b54f0 	ldrsh	r5, [fp, #-64]	; 0xffffffc0
+ 120:	e3550001 	cmp	r5, #1
+ 124:	0a000011 	beq	170 <ls+0x84>
+ 128:	e3550002 	cmp	r5, #2
+ 12c:	0a000003 	beq	140 <ls+0x54>
+      }
+      printf(1, "%s %d %d %d\n", fmtname(buf), st.type, st.ino, st.size);
+    }
+    break;
+  }
+  close(fd);
+ 130:	e1a00004 	mov	r0, r4
+ 134:	eb00013e 	bl	634 <close>
+}
+ 138:	e24bd018 	sub	sp, fp, #24
+ 13c:	e8bd89f0 	pop	{r4, r5, r6, r7, r8, fp, pc}
+    return;
+  }
+  
+  switch(st.type){
+  case T_FILE:
+    printf(1, "%s %d %d %d\n", fmtname(path), st.type, st.ino, st.size);
+ 140:	e1a00006 	mov	r0, r6
+ 144:	ebffffbe 	bl	44 <fmtname>
+ 148:	e51bc038 	ldr	ip, [fp, #-56]	; 0x38
+ 14c:	e15b34f0 	ldrsh	r3, [fp, #-64]	; 0xffffffc0
+ 150:	e58dc000 	str	ip, [sp]
+ 154:	e51bc030 	ldr	ip, [fp, #-48]	; 0x30
+ 158:	e59f1120 	ldr	r1, [pc, #288]	; 280 <ls+0x194>
+ 15c:	e58dc004 	str	ip, [sp, #4]
+ 160:	e1a02000 	mov	r2, r0
+ 164:	e3a00001 	mov	r0, #1
+ 168:	eb000243 	bl	a7c <printf>
+    break;
+ 16c:	eaffffef 	b	130 <ls+0x44>
+  
+  case T_DIR:
+    if(strlen(path) + 1 + DIRSIZ + 1 > sizeof buf){
+ 170:	e1a00006 	mov	r0, r6
+ 174:	eb000062 	bl	304 <strlen>
+ 178:	e2800010 	add	r0, r0, #16
+ 17c:	e3500c02 	cmp	r0, #512	; 0x200
+ 180:	8a000029 	bhi	22c <ls+0x140>
+      printf(1, "ls: path too long\n");
+      break;
+    }
+    strcpy(buf, path);
+ 184:	e24b5d09 	sub	r5, fp, #576	; 0x240
+ 188:	e1a01006 	mov	r1, r6
+ 18c:	e1a00005 	mov	r0, r5
+ 190:	eb00003e 	bl	290 <strcpy>
+    p = buf+strlen(buf);
+ 194:	e1a00005 	mov	r0, r5
+ 198:	eb000059 	bl	304 <strlen>
+    *p++ = '/';
+    while(read(fd, &de, sizeof(de)) == sizeof(de)){
+      if(de.inum == 0)
+        continue;
+      memmove(p, de.name, DIRSIZ);
+      p[DIRSIZ] = 0;
+ 19c:	e3a08000 	mov	r8, #0
+      printf(1, "ls: path too long\n");
+      break;
+    }
+    strcpy(buf, path);
+    p = buf+strlen(buf);
+    *p++ = '/';
+ 1a0:	e3a0302f 	mov	r3, #47	; 0x2f
+    if(strlen(path) + 1 + DIRSIZ + 1 > sizeof buf){
+      printf(1, "ls: path too long\n");
+      break;
+    }
+    strcpy(buf, path);
+    p = buf+strlen(buf);
+ 1a4:	e0856000 	add	r6, r5, r0
+    *p++ = '/';
+ 1a8:	e2867001 	add	r7, r6, #1
+ 1ac:	e7c53000 	strb	r3, [r5, r0]
+    while(read(fd, &de, sizeof(de)) == sizeof(de)){
+ 1b0:	e24b102c 	sub	r1, fp, #44	; 0x2c
+ 1b4:	e1a00004 	mov	r0, r4
+ 1b8:	e3a02010 	mov	r2, #16
+ 1bc:	eb000102 	bl	5cc <read>
+ 1c0:	e3500010 	cmp	r0, #16
+ 1c4:	1affffd9 	bne	130 <ls+0x44>
+      if(de.inum == 0)
+ 1c8:	e15b32bc 	ldrh	r3, [fp, #-44]	; 0xffffffd4
+ 1cc:	e3530000 	cmp	r3, #0
+ 1d0:	0afffff6 	beq	1b0 <ls+0xc4>
+        continue;
+      memmove(p, de.name, DIRSIZ);
+ 1d4:	e3a0200e 	mov	r2, #14
+ 1d8:	e24b102a 	sub	r1, fp, #42	; 0x2a
+ 1dc:	e1a00007 	mov	r0, r7
+ 1e0:	eb0000b8 	bl	4c8 <memmove>
+      p[DIRSIZ] = 0;
+      if(stat(buf, &st) < 0){
+ 1e4:	e24b1040 	sub	r1, fp, #64	; 0x40
+ 1e8:	e1a00005 	mov	r0, r5
+    *p++ = '/';
+    while(read(fd, &de, sizeof(de)) == sizeof(de)){
+      if(de.inum == 0)
+        continue;
+      memmove(p, de.name, DIRSIZ);
+      p[DIRSIZ] = 0;
+ 1ec:	e5c6800f 	strb	r8, [r6, #15]
+      if(stat(buf, &st) < 0){
+ 1f0:	eb000090 	bl	438 <stat>
+ 1f4:	e3500000 	cmp	r0, #0
+        printf(1, "ls: cannot stat %s\n", buf);
+        continue;
+      }
+      printf(1, "%s %d %d %d\n", fmtname(buf), st.type, st.ino, st.size);
+ 1f8:	e1a00005 	mov	r0, r5
+    while(read(fd, &de, sizeof(de)) == sizeof(de)){
+      if(de.inum == 0)
+        continue;
+      memmove(p, de.name, DIRSIZ);
+      p[DIRSIZ] = 0;
+      if(stat(buf, &st) < 0){
+ 1fc:	ba000013 	blt	250 <ls+0x164>
+        printf(1, "ls: cannot stat %s\n", buf);
+        continue;
+      }
+      printf(1, "%s %d %d %d\n", fmtname(buf), st.type, st.ino, st.size);
+ 200:	ebffff8f 	bl	44 <fmtname>
+ 204:	e51bc038 	ldr	ip, [fp, #-56]	; 0x38
+ 208:	e15b34f0 	ldrsh	r3, [fp, #-64]	; 0xffffffc0
+ 20c:	e58dc000 	str	ip, [sp]
+ 210:	e51bc030 	ldr	ip, [fp, #-48]	; 0x30
+ 214:	e59f1064 	ldr	r1, [pc, #100]	; 280 <ls+0x194>
+ 218:	e58dc004 	str	ip, [sp, #4]
+ 21c:	e1a02000 	mov	r2, r0
+ 220:	e3a00001 	mov	r0, #1
+ 224:	eb000214 	bl	a7c <printf>
+ 228:	eaffffe0 	b	1b0 <ls+0xc4>
+    printf(1, "%s %d %d %d\n", fmtname(path), st.type, st.ino, st.size);
+    break;
+  
+  case T_DIR:
+    if(strlen(path) + 1 + DIRSIZ + 1 > sizeof buf){
+      printf(1, "ls: path too long\n");
+ 22c:	e1a00005 	mov	r0, r5
+ 230:	e59f104c 	ldr	r1, [pc, #76]	; 284 <ls+0x198>
+ 234:	eb000210 	bl	a7c <printf>
+      break;
+ 238:	eaffffbc 	b	130 <ls+0x44>
+  int fd;
+  struct dirent de;
+  struct stat st;
+  
+  if((fd = open(path, 0)) < 0){
+    printf(2, "ls: cannot open %s\n", path);
+ 23c:	e3a00002 	mov	r0, #2
+ 240:	e59f1040 	ldr	r1, [pc, #64]	; 288 <ls+0x19c>
+ 244:	e1a02006 	mov	r2, r6
+ 248:	eb00020b 	bl	a7c <printf>
+    return;
+ 24c:	eaffffb9 	b	138 <ls+0x4c>
+      if(de.inum == 0)
+        continue;
+      memmove(p, de.name, DIRSIZ);
+      p[DIRSIZ] = 0;
+      if(stat(buf, &st) < 0){
+        printf(1, "ls: cannot stat %s\n", buf);
+ 250:	e3a00001 	mov	r0, #1
+ 254:	e59f1030 	ldr	r1, [pc, #48]	; 28c <ls+0x1a0>
+ 258:	e1a02005 	mov	r2, r5
+ 25c:	eb000206 	bl	a7c <printf>
+        continue;
+ 260:	eaffffd2 	b	1b0 <ls+0xc4>
+    printf(2, "ls: cannot open %s\n", path);
+    return;
+  }
+  
+  if(fstat(fd, &st) < 0){
+    printf(2, "ls: cannot stat %s\n", path);
+ 264:	e59f1020 	ldr	r1, [pc, #32]	; 28c <ls+0x1a0>
+ 268:	e1a02006 	mov	r2, r6
+ 26c:	e3a00002 	mov	r0, #2
+ 270:	eb000201 	bl	a7c <printf>
+    close(fd);
+ 274:	e1a00004 	mov	r0, r4
+ 278:	eb0000ed 	bl	634 <close>
+    return;
+ 27c:	eaffffad 	b	138 <ls+0x4c>
+ 280:	00000d8c 	.word	0x00000d8c
+ 284:	00000d9c 	.word	0x00000d9c
+ 288:	00000d64 	.word	0x00000d64
+ 28c:	00000d78 	.word	0x00000d78
+
+00000290 <strcpy>:
+#include "user.h"
+#include "arm.h"
+
+char*
+strcpy(char *s, char *t)
+{
+ 290:	e52db004 	push	{fp}		; (str fp, [sp, #-4]!)
+  char *os;
+
+  os = s;
+  while((*s++ = *t++) != 0)
+ 294:	e1a02000 	mov	r2, r0
+#include "user.h"
+#include "arm.h"
+
+char*
+strcpy(char *s, char *t)
+{
+ 298:	e28db000 	add	fp, sp, #0
+  char *os;
+
+  os = s;
+  while((*s++ = *t++) != 0)
+ 29c:	e4d13001 	ldrb	r3, [r1], #1
+ 2a0:	e3530000 	cmp	r3, #0
+ 2a4:	e4c23001 	strb	r3, [r2], #1
+ 2a8:	1afffffb 	bne	29c <strcpy+0xc>
+    ;
+  return os;
+}
+ 2ac:	e28bd000 	add	sp, fp, #0
+ 2b0:	e8bd0800 	pop	{fp}
+ 2b4:	e12fff1e 	bx	lr
+
+000002b8 <strcmp>:
+
+int
+strcmp(const char *p, const char *q)
+{
+ 2b8:	e52db004 	push	{fp}		; (str fp, [sp, #-4]!)
+ 2bc:	e28db000 	add	fp, sp, #0
+  while(*p && *p == *q)
+ 2c0:	e5d03000 	ldrb	r3, [r0]
+ 2c4:	e5d12000 	ldrb	r2, [r1]
+ 2c8:	e3530000 	cmp	r3, #0
+ 2cc:	1a000004 	bne	2e4 <strcmp+0x2c>
+ 2d0:	ea000005 	b	2ec <strcmp+0x34>
+ 2d4:	e5f03001 	ldrb	r3, [r0, #1]!
+ 2d8:	e3530000 	cmp	r3, #0
+ 2dc:	0a000006 	beq	2fc <strcmp+0x44>
+ 2e0:	e5f12001 	ldrb	r2, [r1, #1]!
+ 2e4:	e1530002 	cmp	r3, r2
+ 2e8:	0afffff9 	beq	2d4 <strcmp+0x1c>
+    p++, q++;
+  return (uchar)*p - (uchar)*q;
+}
+ 2ec:	e0620003 	rsb	r0, r2, r3
+ 2f0:	e28bd000 	add	sp, fp, #0
+ 2f4:	e8bd0800 	pop	{fp}
+ 2f8:	e12fff1e 	bx	lr
+}
+
+int
+strcmp(const char *p, const char *q)
+{
+  while(*p && *p == *q)
+ 2fc:	e5d12001 	ldrb	r2, [r1, #1]
+ 300:	eafffff9 	b	2ec <strcmp+0x34>
+
+00000304 <strlen>:
+  return (uchar)*p - (uchar)*q;
+}
+
+uint
+strlen(char *s)
+{
+ 304:	e52db004 	push	{fp}		; (str fp, [sp, #-4]!)
+ 308:	e28db000 	add	fp, sp, #0
+  int n;
+
+  for(n = 0; s[n]; n++)
+ 30c:	e5d03000 	ldrb	r3, [r0]
+ 310:	e3530000 	cmp	r3, #0
+ 314:	01a00003 	moveq	r0, r3
+ 318:	0a000006 	beq	338 <strlen+0x34>
+ 31c:	e1a02000 	mov	r2, r0
+ 320:	e3a03000 	mov	r3, #0
+ 324:	e5f21001 	ldrb	r1, [r2, #1]!
+ 328:	e2833001 	add	r3, r3, #1
+ 32c:	e1a00003 	mov	r0, r3
+ 330:	e3510000 	cmp	r1, #0
+ 334:	1afffffa 	bne	324 <strlen+0x20>
+    ;
+  return n;
+}
+ 338:	e28bd000 	add	sp, fp, #0
+ 33c:	e8bd0800 	pop	{fp}
+ 340:	e12fff1e 	bx	lr
+
+00000344 <memset>:
+memset(void *dst, int c, uint n)
+{
+  char *p=dst;
+  u32 rc=n;
+
+  while (rc-- > 0) *p++ = c;
+ 344:	e3520000 	cmp	r2, #0
+  return n;
+}
+
+void*
+memset(void *dst, int c, uint n)
+{
+ 348:	e52db004 	push	{fp}		; (str fp, [sp, #-4]!)
+ 34c:	e28db000 	add	fp, sp, #0
+  char *p=dst;
+  u32 rc=n;
+
+  while (rc-- > 0) *p++ = c;
+ 350:	0a000006 	beq	370 <memset+0x2c>
+ 354:	e6ef1071 	uxtb	r1, r1
+ 358:	e1a03002 	mov	r3, r2
+}
+
+void*
+memset(void *dst, int c, uint n)
+{
+  char *p=dst;
+ 35c:	e1a0c000 	mov	ip, r0
+  u32 rc=n;
+
+  while (rc-- > 0) *p++ = c;
+ 360:	e2533001 	subs	r3, r3, #1
+ 364:	e4cc1001 	strb	r1, [ip], #1
+ 368:	1afffffc 	bne	360 <memset+0x1c>
+ 36c:	e0800002 	add	r0, r0, r2
+  return (void *)p;
+}
+ 370:	e28bd000 	add	sp, fp, #0
+ 374:	e8bd0800 	pop	{fp}
+ 378:	e12fff1e 	bx	lr
+
+0000037c <strchr>:
+
+char*
+strchr(const char *s, char c)
+{
+ 37c:	e52db004 	push	{fp}		; (str fp, [sp, #-4]!)
+ 380:	e28db000 	add	fp, sp, #0
+  for(; *s; s++)
+ 384:	e5d03000 	ldrb	r3, [r0]
+ 388:	e3530000 	cmp	r3, #0
+ 38c:	1a000004 	bne	3a4 <strchr+0x28>
+ 390:	ea000008 	b	3b8 <strchr+0x3c>
+ 394:	e5d03001 	ldrb	r3, [r0, #1]
+ 398:	e2800001 	add	r0, r0, #1
+ 39c:	e3530000 	cmp	r3, #0
+ 3a0:	0a000004 	beq	3b8 <strchr+0x3c>
+    if(*s == c)
+ 3a4:	e1530001 	cmp	r3, r1
+ 3a8:	1afffff9 	bne	394 <strchr+0x18>
+      return (char*)s;
+  return 0;
+}
+ 3ac:	e28bd000 	add	sp, fp, #0
+ 3b0:	e8bd0800 	pop	{fp}
+ 3b4:	e12fff1e 	bx	lr
+strchr(const char *s, char c)
+{
+  for(; *s; s++)
+    if(*s == c)
+      return (char*)s;
+  return 0;
+ 3b8:	e1a00003 	mov	r0, r3
+ 3bc:	eafffffa 	b	3ac <strchr+0x30>
+
+000003c0 <gets>:
+}
+
+char*
+gets(char *buf, int max)
+{
+ 3c0:	e92d49f0 	push	{r4, r5, r6, r7, r8, fp, lr}
+ 3c4:	e28db018 	add	fp, sp, #24
+ 3c8:	e24dd00c 	sub	sp, sp, #12
+ 3cc:	e1a08000 	mov	r8, r0
+ 3d0:	e1a07001 	mov	r7, r1
+  int i, cc;
+  char c;
+
+  for(i=0; i+1 < max; ){
+ 3d4:	e1a06000 	mov	r6, r0
+ 3d8:	e3a05000 	mov	r5, #0
+ 3dc:	ea000008 	b	404 <gets+0x44>
+    cc = read(0, &c, 1);
+ 3e0:	eb000079 	bl	5cc <read>
+    if(cc < 1)
+ 3e4:	e3500000 	cmp	r0, #0
+ 3e8:	da00000b 	ble	41c <gets+0x5c>
+      break;
+    buf[i++] = c;
+ 3ec:	e55b301d 	ldrb	r3, [fp, #-29]
+    if(c == '\n' || c == '\r')
+ 3f0:	e1a05004 	mov	r5, r4
+ 3f4:	e353000a 	cmp	r3, #10
+ 3f8:	1353000d 	cmpne	r3, #13
+
+  for(i=0; i+1 < max; ){
+    cc = read(0, &c, 1);
+    if(cc < 1)
+      break;
+    buf[i++] = c;
+ 3fc:	e4c63001 	strb	r3, [r6], #1
+    if(c == '\n' || c == '\r')
+ 400:	0a00000a 	beq	430 <gets+0x70>
+{
+  int i, cc;
+  char c;
+
+  for(i=0; i+1 < max; ){
+    cc = read(0, &c, 1);
+ 404:	e3a02001 	mov	r2, #1
+gets(char *buf, int max)
+{
+  int i, cc;
+  char c;
+
+  for(i=0; i+1 < max; ){
+ 408:	e0854002 	add	r4, r5, r2
+ 40c:	e1540007 	cmp	r4, r7
+    cc = read(0, &c, 1);
+ 410:	e3a00000 	mov	r0, #0
+ 414:	e24b101d 	sub	r1, fp, #29
+gets(char *buf, int max)
+{
+  int i, cc;
+  char c;
+
+  for(i=0; i+1 < max; ){
+ 418:	bafffff0 	blt	3e0 <gets+0x20>
+      break;
+    buf[i++] = c;
+    if(c == '\n' || c == '\r')
+      break;
+  }
+  buf[i] = '\0';
+ 41c:	e3a03000 	mov	r3, #0
+ 420:	e7c83005 	strb	r3, [r8, r5]
+  return buf;
+}
+ 424:	e1a00008 	mov	r0, r8
+ 428:	e24bd018 	sub	sp, fp, #24
+ 42c:	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; ){
+ 430:	e1a05004 	mov	r5, r4
+ 434:	eafffff8 	b	41c <gets+0x5c>
+
+00000438 <stat>:
+  return buf;
+}
+
+int
+stat(char *n, struct stat *st)
+{
+ 438:	e92d4830 	push	{r4, r5, fp, lr}
+ 43c:	e1a05001 	mov	r5, r1
+ 440:	e28db00c 	add	fp, sp, #12
+  int fd;
+  int r;
+
+  fd = open(n, O_RDONLY);
+ 444:	e3a01000 	mov	r1, #0
+ 448:	eb0000a0 	bl	6d0 <open>
+  if(fd < 0)
+ 44c:	e2504000 	subs	r4, r0, #0
+    return -1;
+ 450:	b3e05000 	mvnlt	r5, #0
+{
+  int fd;
+  int r;
+
+  fd = open(n, O_RDONLY);
+  if(fd < 0)
+ 454:	ba000004 	blt	46c <stat+0x34>
+    return -1;
+  r = fstat(fd, st);
+ 458:	e1a01005 	mov	r1, r5
+ 45c:	eb0000c2 	bl	76c <fstat>
+ 460:	e1a05000 	mov	r5, r0
+  close(fd);
+ 464:	e1a00004 	mov	r0, r4
+ 468:	eb000071 	bl	634 <close>
+  return r;
+}
+ 46c:	e1a00005 	mov	r0, r5
+ 470:	e8bd8830 	pop	{r4, r5, fp, pc}
+
+00000474 <atoi>:
+
+int
+atoi(const char *s)
+{
+ 474:	e52db004 	push	{fp}		; (str fp, [sp, #-4]!)
+ 478:	e28db000 	add	fp, sp, #0
+  int n;
+
+  n = 0;
+  while('0' <= *s && *s <= '9')
+ 47c:	e5d03000 	ldrb	r3, [r0]
+ 480:	e2432030 	sub	r2, r3, #48	; 0x30
+ 484:	e6ef2072 	uxtb	r2, r2
+ 488:	e3520009 	cmp	r2, #9
+int
+atoi(const char *s)
+{
+  int n;
+
+  n = 0;
+ 48c:	83a00000 	movhi	r0, #0
+  while('0' <= *s && *s <= '9')
+ 490:	8a000009 	bhi	4bc <atoi+0x48>
+ 494:	e1a02000 	mov	r2, r0
+int
+atoi(const char *s)
+{
+  int n;
+
+  n = 0;
+ 498:	e3a00000 	mov	r0, #0
+  while('0' <= *s && *s <= '9')
+    n = n*10 + *s++ - '0';
+ 49c:	e0800100 	add	r0, r0, r0, lsl #2
+ 4a0:	e0830080 	add	r0, r3, r0, lsl #1
+atoi(const char *s)
+{
+  int n;
+
+  n = 0;
+  while('0' <= *s && *s <= '9')
+ 4a4:	e5f23001 	ldrb	r3, [r2, #1]!
+    n = n*10 + *s++ - '0';
+ 4a8:	e2400030 	sub	r0, r0, #48	; 0x30
+atoi(const char *s)
+{
+  int n;
+
+  n = 0;
+  while('0' <= *s && *s <= '9')
+ 4ac:	e2431030 	sub	r1, r3, #48	; 0x30
+ 4b0:	e6ef1071 	uxtb	r1, r1
+ 4b4:	e3510009 	cmp	r1, #9
+ 4b8:	9afffff7 	bls	49c <atoi+0x28>
+    n = n*10 + *s++ - '0';
+  return n;
+}
+ 4bc:	e28bd000 	add	sp, fp, #0
+ 4c0:	e8bd0800 	pop	{fp}
+ 4c4:	e12fff1e 	bx	lr
+
+000004c8 <memmove>:
+{
+  char *dst, *src;
+  
+  dst = vdst;
+  src = vsrc;
+  while(n-- > 0)
+ 4c8:	e3520000 	cmp	r2, #0
+  return n;
+}
+
+void*
+memmove(void *vdst, void *vsrc, int n)
+{
+ 4cc:	e52db004 	push	{fp}		; (str fp, [sp, #-4]!)
+ 4d0:	e28db000 	add	fp, sp, #0
+  char *dst, *src;
+  
+  dst = vdst;
+  src = vsrc;
+  while(n-- > 0)
+ 4d4:	da000005 	ble	4f0 <memmove+0x28>
+    n = n*10 + *s++ - '0';
+  return n;
+}
+
+void*
+memmove(void *vdst, void *vsrc, int n)
+ 4d8:	e0802002 	add	r2, r0, r2
+{
+  char *dst, *src;
+  
+  dst = vdst;
+ 4dc:	e1a03000 	mov	r3, r0
+  src = vsrc;
+  while(n-- > 0)
+    *dst++ = *src++;
+ 4e0:	e4d1c001 	ldrb	ip, [r1], #1
+ 4e4:	e4c3c001 	strb	ip, [r3], #1
+{
+  char *dst, *src;
+  
+  dst = vdst;
+  src = vsrc;
+  while(n-- > 0)
+ 4e8:	e1530002 	cmp	r3, r2
+ 4ec:	1afffffb 	bne	4e0 <memmove+0x18>
+    *dst++ = *src++;
+  return vdst;
+}
+ 4f0:	e28bd000 	add	sp, fp, #0
+ 4f4:	e8bd0800 	pop	{fp}
+ 4f8:	e12fff1e 	bx	lr
+
+000004fc <fork>:
+ 4fc:	e92d4000 	push	{lr}
+ 500:	e92d0008 	push	{r3}
+ 504:	e92d0004 	push	{r2}
+ 508:	e92d0002 	push	{r1}
+ 50c:	e92d0001 	push	{r0}
+ 510:	e3a00001 	mov	r0, #1
+ 514:	ef000040 	svc	0x00000040
+ 518:	e8bd0002 	pop	{r1}
+ 51c:	e8bd0002 	pop	{r1}
+ 520:	e8bd0004 	pop	{r2}
+ 524:	e8bd0008 	pop	{r3}
+ 528:	e8bd4000 	pop	{lr}
+ 52c:	e12fff1e 	bx	lr
+
+00000530 <exit>:
+ 530:	e92d4000 	push	{lr}
+ 534:	e92d0008 	push	{r3}
+ 538:	e92d0004 	push	{r2}
+ 53c:	e92d0002 	push	{r1}
+ 540:	e92d0001 	push	{r0}
+ 544:	e3a00002 	mov	r0, #2
+ 548:	ef000040 	svc	0x00000040
+ 54c:	e8bd0002 	pop	{r1}
+ 550:	e8bd0002 	pop	{r1}
+ 554:	e8bd0004 	pop	{r2}
+ 558:	e8bd0008 	pop	{r3}
+ 55c:	e8bd4000 	pop	{lr}
+ 560:	e12fff1e 	bx	lr
+
+00000564 <wait>:
+ 564:	e92d4000 	push	{lr}
+ 568:	e92d0008 	push	{r3}
+ 56c:	e92d0004 	push	{r2}
+ 570:	e92d0002 	push	{r1}
+ 574:	e92d0001 	push	{r0}
+ 578:	e3a00003 	mov	r0, #3
+ 57c:	ef000040 	svc	0x00000040
+ 580:	e8bd0002 	pop	{r1}
+ 584:	e8bd0002 	pop	{r1}
+ 588:	e8bd0004 	pop	{r2}
+ 58c:	e8bd0008 	pop	{r3}
+ 590:	e8bd4000 	pop	{lr}
+ 594:	e12fff1e 	bx	lr
+
+00000598 <pipe>:
+ 598:	e92d4000 	push	{lr}
+ 59c:	e92d0008 	push	{r3}
+ 5a0:	e92d0004 	push	{r2}
+ 5a4:	e92d0002 	push	{r1}
+ 5a8:	e92d0001 	push	{r0}
+ 5ac:	e3a00004 	mov	r0, #4
+ 5b0:	ef000040 	svc	0x00000040
+ 5b4:	e8bd0002 	pop	{r1}
+ 5b8:	e8bd0002 	pop	{r1}
+ 5bc:	e8bd0004 	pop	{r2}
+ 5c0:	e8bd0008 	pop	{r3}
+ 5c4:	e8bd4000 	pop	{lr}
+ 5c8:	e12fff1e 	bx	lr
+
+000005cc <read>:
+ 5cc:	e92d4000 	push	{lr}
+ 5d0:	e92d0008 	push	{r3}
+ 5d4:	e92d0004 	push	{r2}
+ 5d8:	e92d0002 	push	{r1}
+ 5dc:	e92d0001 	push	{r0}
+ 5e0:	e3a00005 	mov	r0, #5
+ 5e4:	ef000040 	svc	0x00000040
+ 5e8:	e8bd0002 	pop	{r1}
+ 5ec:	e8bd0002 	pop	{r1}
+ 5f0:	e8bd0004 	pop	{r2}
+ 5f4:	e8bd0008 	pop	{r3}
+ 5f8:	e8bd4000 	pop	{lr}
+ 5fc:	e12fff1e 	bx	lr
+
+00000600 <write>:
+ 600:	e92d4000 	push	{lr}
+ 604:	e92d0008 	push	{r3}
+ 608:	e92d0004 	push	{r2}
+ 60c:	e92d0002 	push	{r1}
+ 610:	e92d0001 	push	{r0}
+ 614:	e3a00010 	mov	r0, #16
+ 618:	ef000040 	svc	0x00000040
+ 61c:	e8bd0002 	pop	{r1}
+ 620:	e8bd0002 	pop	{r1}
+ 624:	e8bd0004 	pop	{r2}
+ 628:	e8bd0008 	pop	{r3}
+ 62c:	e8bd4000 	pop	{lr}
+ 630:	e12fff1e 	bx	lr
+
+00000634 <close>:
+ 634:	e92d4000 	push	{lr}
+ 638:	e92d0008 	push	{r3}
+ 63c:	e92d0004 	push	{r2}
+ 640:	e92d0002 	push	{r1}
+ 644:	e92d0001 	push	{r0}
+ 648:	e3a00015 	mov	r0, #21
+ 64c:	ef000040 	svc	0x00000040
+ 650:	e8bd0002 	pop	{r1}
+ 654:	e8bd0002 	pop	{r1}
+ 658:	e8bd0004 	pop	{r2}
+ 65c:	e8bd0008 	pop	{r3}
+ 660:	e8bd4000 	pop	{lr}
+ 664:	e12fff1e 	bx	lr
+
+00000668 <kill>:
+ 668:	e92d4000 	push	{lr}
+ 66c:	e92d0008 	push	{r3}
+ 670:	e92d0004 	push	{r2}
+ 674:	e92d0002 	push	{r1}
+ 678:	e92d0001 	push	{r0}
+ 67c:	e3a00006 	mov	r0, #6
+ 680:	ef000040 	svc	0x00000040
+ 684:	e8bd0002 	pop	{r1}
+ 688:	e8bd0002 	pop	{r1}
+ 68c:	e8bd0004 	pop	{r2}
+ 690:	e8bd0008 	pop	{r3}
+ 694:	e8bd4000 	pop	{lr}
+ 698:	e12fff1e 	bx	lr
+
+0000069c <exec>:
+ 69c:	e92d4000 	push	{lr}
+ 6a0:	e92d0008 	push	{r3}
+ 6a4:	e92d0004 	push	{r2}
+ 6a8:	e92d0002 	push	{r1}
+ 6ac:	e92d0001 	push	{r0}
+ 6b0:	e3a00007 	mov	r0, #7
+ 6b4:	ef000040 	svc	0x00000040
+ 6b8:	e8bd0002 	pop	{r1}
+ 6bc:	e8bd0002 	pop	{r1}
+ 6c0:	e8bd0004 	pop	{r2}
+ 6c4:	e8bd0008 	pop	{r3}
+ 6c8:	e8bd4000 	pop	{lr}
+ 6cc:	e12fff1e 	bx	lr
+
+000006d0 <open>:
+ 6d0:	e92d4000 	push	{lr}
+ 6d4:	e92d0008 	push	{r3}
+ 6d8:	e92d0004 	push	{r2}
+ 6dc:	e92d0002 	push	{r1}
+ 6e0:	e92d0001 	push	{r0}
+ 6e4:	e3a0000f 	mov	r0, #15
+ 6e8:	ef000040 	svc	0x00000040
+ 6ec:	e8bd0002 	pop	{r1}
+ 6f0:	e8bd0002 	pop	{r1}
+ 6f4:	e8bd0004 	pop	{r2}
+ 6f8:	e8bd0008 	pop	{r3}
+ 6fc:	e8bd4000 	pop	{lr}
+ 700:	e12fff1e 	bx	lr
+
+00000704 <mknod>:
+ 704:	e92d4000 	push	{lr}
+ 708:	e92d0008 	push	{r3}
+ 70c:	e92d0004 	push	{r2}
+ 710:	e92d0002 	push	{r1}
+ 714:	e92d0001 	push	{r0}
+ 718:	e3a00011 	mov	r0, #17
+ 71c:	ef000040 	svc	0x00000040
+ 720:	e8bd0002 	pop	{r1}
+ 724:	e8bd0002 	pop	{r1}
+ 728:	e8bd0004 	pop	{r2}
+ 72c:	e8bd0008 	pop	{r3}
+ 730:	e8bd4000 	pop	{lr}
+ 734:	e12fff1e 	bx	lr
+
+00000738 <unlink>:
+ 738:	e92d4000 	push	{lr}
+ 73c:	e92d0008 	push	{r3}
+ 740:	e92d0004 	push	{r2}
+ 744:	e92d0002 	push	{r1}
+ 748:	e92d0001 	push	{r0}
+ 74c:	e3a00012 	mov	r0, #18
+ 750:	ef000040 	svc	0x00000040
+ 754:	e8bd0002 	pop	{r1}
+ 758:	e8bd0002 	pop	{r1}
+ 75c:	e8bd0004 	pop	{r2}
+ 760:	e8bd0008 	pop	{r3}
+ 764:	e8bd4000 	pop	{lr}
+ 768:	e12fff1e 	bx	lr
+
+0000076c <fstat>:
+ 76c:	e92d4000 	push	{lr}
+ 770:	e92d0008 	push	{r3}
+ 774:	e92d0004 	push	{r2}
+ 778:	e92d0002 	push	{r1}
+ 77c:	e92d0001 	push	{r0}
+ 780:	e3a00008 	mov	r0, #8
+ 784:	ef000040 	svc	0x00000040
+ 788:	e8bd0002 	pop	{r1}
+ 78c:	e8bd0002 	pop	{r1}
+ 790:	e8bd0004 	pop	{r2}
+ 794:	e8bd0008 	pop	{r3}
+ 798:	e8bd4000 	pop	{lr}
+ 79c:	e12fff1e 	bx	lr
+
+000007a0 <link>:
+ 7a0:	e92d4000 	push	{lr}
+ 7a4:	e92d0008 	push	{r3}
+ 7a8:	e92d0004 	push	{r2}
+ 7ac:	e92d0002 	push	{r1}
+ 7b0:	e92d0001 	push	{r0}
+ 7b4:	e3a00013 	mov	r0, #19
+ 7b8:	ef000040 	svc	0x00000040
+ 7bc:	e8bd0002 	pop	{r1}
+ 7c0:	e8bd0002 	pop	{r1}
+ 7c4:	e8bd0004 	pop	{r2}
+ 7c8:	e8bd0008 	pop	{r3}
+ 7cc:	e8bd4000 	pop	{lr}
+ 7d0:	e12fff1e 	bx	lr
+
+000007d4 <mkdir>:
+ 7d4:	e92d4000 	push	{lr}
+ 7d8:	e92d0008 	push	{r3}
+ 7dc:	e92d0004 	push	{r2}
+ 7e0:	e92d0002 	push	{r1}
+ 7e4:	e92d0001 	push	{r0}
+ 7e8:	e3a00014 	mov	r0, #20
+ 7ec:	ef000040 	svc	0x00000040
+ 7f0:	e8bd0002 	pop	{r1}
+ 7f4:	e8bd0002 	pop	{r1}
+ 7f8:	e8bd0004 	pop	{r2}
+ 7fc:	e8bd0008 	pop	{r3}
+ 800:	e8bd4000 	pop	{lr}
+ 804:	e12fff1e 	bx	lr
+
+00000808 <chdir>:
+ 808:	e92d4000 	push	{lr}
+ 80c:	e92d0008 	push	{r3}
+ 810:	e92d0004 	push	{r2}
+ 814:	e92d0002 	push	{r1}
+ 818:	e92d0001 	push	{r0}
+ 81c:	e3a00009 	mov	r0, #9
+ 820:	ef000040 	svc	0x00000040
+ 824:	e8bd0002 	pop	{r1}
+ 828:	e8bd0002 	pop	{r1}
+ 82c:	e8bd0004 	pop	{r2}
+ 830:	e8bd0008 	pop	{r3}
+ 834:	e8bd4000 	pop	{lr}
+ 838:	e12fff1e 	bx	lr
+
+0000083c <dup>:
+ 83c:	e92d4000 	push	{lr}
+ 840:	e92d0008 	push	{r3}
+ 844:	e92d0004 	push	{r2}
+ 848:	e92d0002 	push	{r1}
+ 84c:	e92d0001 	push	{r0}
+ 850:	e3a0000a 	mov	r0, #10
+ 854:	ef000040 	svc	0x00000040
+ 858:	e8bd0002 	pop	{r1}
+ 85c:	e8bd0002 	pop	{r1}
+ 860:	e8bd0004 	pop	{r2}
+ 864:	e8bd0008 	pop	{r3}
+ 868:	e8bd4000 	pop	{lr}
+ 86c:	e12fff1e 	bx	lr
+
+00000870 <getpid>:
+ 870:	e92d4000 	push	{lr}
+ 874:	e92d0008 	push	{r3}
+ 878:	e92d0004 	push	{r2}
+ 87c:	e92d0002 	push	{r1}
+ 880:	e92d0001 	push	{r0}
+ 884:	e3a0000b 	mov	r0, #11
+ 888:	ef000040 	svc	0x00000040
+ 88c:	e8bd0002 	pop	{r1}
+ 890:	e8bd0002 	pop	{r1}
+ 894:	e8bd0004 	pop	{r2}
+ 898:	e8bd0008 	pop	{r3}
+ 89c:	e8bd4000 	pop	{lr}
+ 8a0:	e12fff1e 	bx	lr
+
+000008a4 <sbrk>:
+ 8a4:	e92d4000 	push	{lr}
+ 8a8:	e92d0008 	push	{r3}
+ 8ac:	e92d0004 	push	{r2}
+ 8b0:	e92d0002 	push	{r1}
+ 8b4:	e92d0001 	push	{r0}
+ 8b8:	e3a0000c 	mov	r0, #12
+ 8bc:	ef000040 	svc	0x00000040
+ 8c0:	e8bd0002 	pop	{r1}
+ 8c4:	e8bd0002 	pop	{r1}
+ 8c8:	e8bd0004 	pop	{r2}
+ 8cc:	e8bd0008 	pop	{r3}
+ 8d0:	e8bd4000 	pop	{lr}
+ 8d4:	e12fff1e 	bx	lr
+
+000008d8 <sleep>:
+ 8d8:	e92d4000 	push	{lr}
+ 8dc:	e92d0008 	push	{r3}
+ 8e0:	e92d0004 	push	{r2}
+ 8e4:	e92d0002 	push	{r1}
+ 8e8:	e92d0001 	push	{r0}
+ 8ec:	e3a0000d 	mov	r0, #13
+ 8f0:	ef000040 	svc	0x00000040
+ 8f4:	e8bd0002 	pop	{r1}
+ 8f8:	e8bd0002 	pop	{r1}
+ 8fc:	e8bd0004 	pop	{r2}
+ 900:	e8bd0008 	pop	{r3}
+ 904:	e8bd4000 	pop	{lr}
+ 908:	e12fff1e 	bx	lr
+
+0000090c <uptime>:
+ 90c:	e92d4000 	push	{lr}
+ 910:	e92d0008 	push	{r3}
+ 914:	e92d0004 	push	{r2}
+ 918:	e92d0002 	push	{r1}
+ 91c:	e92d0001 	push	{r0}
+ 920:	e3a0000e 	mov	r0, #14
+ 924:	ef000040 	svc	0x00000040
+ 928:	e8bd0002 	pop	{r1}
+ 92c:	e8bd0002 	pop	{r1}
+ 930:	e8bd0004 	pop	{r2}
+ 934:	e8bd0008 	pop	{r3}
+ 938:	e8bd4000 	pop	{lr}
+ 93c:	e12fff1e 	bx	lr
+
+00000940 <putc>:
+#include "stat.h"
+#include "user.h"
+
+static void
+putc(int fd, char c)
+{
+ 940:	e92d4800 	push	{fp, lr}
+ 944:	e28db004 	add	fp, sp, #4
+ 948:	e24b3004 	sub	r3, fp, #4
+ 94c:	e24dd008 	sub	sp, sp, #8
+  write(fd, &c, 1);
+ 950:	e3a02001 	mov	r2, #1
+#include "stat.h"
+#include "user.h"
+
+static void
+putc(int fd, char c)
+{
+ 954:	e5631001 	strb	r1, [r3, #-1]!
+  write(fd, &c, 1);
+ 958:	e1a01003 	mov	r1, r3
+ 95c:	ebffff27 	bl	600 <write>
+}
+ 960:	e24bd004 	sub	sp, fp, #4
+ 964:	e8bd8800 	pop	{fp, pc}
+
+00000968 <printint>:
+    return q;
+}
+
+static void
+printint(int fd, int xx, int base, int sgn)
+{
+ 968:	e92d4ff0 	push	{r4, r5, r6, r7, r8, r9, sl, fp, lr}
+ 96c:	e1a04000 	mov	r4, r0
+  char buf[16];
+  int i, neg;
+  uint x, y, b;
+
+  neg = 0;
+  if(sgn && xx < 0){
+ 970:	e1a00fa1 	lsr	r0, r1, #31
+ 974:	e3530000 	cmp	r3, #0
+ 978:	03a03000 	moveq	r3, #0
+ 97c:	12003001 	andne	r3, r0, #1
+    return q;
+}
+
+static void
+printint(int fd, int xx, int base, int sgn)
+{
+ 980:	e28db020 	add	fp, sp, #32
+  char buf[16];
+  int i, neg;
+  uint x, y, b;
+
+  neg = 0;
+  if(sgn && xx < 0){
+ 984:	e3530000 	cmp	r3, #0
+    return q;
+}
+
+static void
+printint(int fd, int xx, int base, int sgn)
+{
+ 988:	e24dd014 	sub	sp, sp, #20
+ 98c:	e59f909c 	ldr	r9, [pc, #156]	; a30 <printint+0xc8>
+  uint x, y, b;
+
+  neg = 0;
+  if(sgn && xx < 0){
+    neg = 1;
+    x = -xx;
+ 990:	12611000 	rsbne	r1, r1, #0
+  int i, neg;
+  uint x, y, b;
+
+  neg = 0;
+  if(sgn && xx < 0){
+    neg = 1;
+ 994:	13a03001 	movne	r3, #1
+  } else {
+    x = xx;
+  }
+
+  b = base;
+  i = 0;
+ 998:	e3a0a000 	mov	sl, #0
+ 99c:	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);
+ 9a0:	e3a08001 	mov	r8, #1
+  write(fd, &c, 1);
+}
+
+u32 div(u32 n, u32 d)  // long division
+{
+    u32 q=0, r=0;
+ 9a4:	e3a07000 	mov	r7, #0
+    int i;
+
+    for(i=31;i>=0;i--){
+ 9a8:	e3a0001f 	mov	r0, #31
+  write(fd, &c, 1);
+}
+
+u32 div(u32 n, u32 d)  // long division
+{
+    u32 q=0, r=0;
+ 9ac:	e1a0c007 	mov	ip, r7
+    int i;
+
+    for(i=31;i>=0;i--){
+        r = r << 1;
+        r = r | ((n >> i) & 1);
+ 9b0:	e1a0e031 	lsr	lr, r1, r0
+ 9b4:	e20ee001 	and	lr, lr, #1
+ 9b8:	e18ec08c 	orr	ip, lr, ip, lsl #1
+        if(r >= d) {
+ 9bc:	e152000c 	cmp	r2, ip
+            r = r - d;
+            q = q | (1 << i);
+ 9c0:	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;
+ 9c4:	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--){
+ 9c8:	e2500001 	subs	r0, r0, #1
+ 9cc:	2afffff7 	bcs	9b0 <printint+0x48>
+
+  b = base;
+  i = 0;
+  do{
+    y = div(x, b);
+    buf[i++] = digits[x - y * b];
+ 9d0:	e0000792 	mul	r0, r2, r7
+  }while((x = y) != 0);
+ 9d4:	e3570000 	cmp	r7, #0
+
+  b = base;
+  i = 0;
+  do{
+    y = div(x, b);
+    buf[i++] = digits[x - y * b];
+ 9d8:	e0601001 	rsb	r1, r0, r1
+ 9dc:	e28a5001 	add	r5, sl, #1
+ 9e0:	e7d91001 	ldrb	r1, [r9, r1]
+ 9e4:	e7c6100a 	strb	r1, [r6, sl]
+  }while((x = y) != 0);
+ 9e8:	11a01007 	movne	r1, r7
+
+  b = base;
+  i = 0;
+  do{
+    y = div(x, b);
+    buf[i++] = digits[x - y * b];
+ 9ec:	11a0a005 	movne	sl, r5
+ 9f0:	1affffeb 	bne	9a4 <printint+0x3c>
+  }while((x = y) != 0);
+  if(neg)
+ 9f4:	e3530000 	cmp	r3, #0
+    buf[i++] = '-';
+ 9f8:	124b2024 	subne	r2, fp, #36	; 0x24
+ 9fc:	10823005 	addne	r3, r2, r5
+ a00:	128a5002 	addne	r5, sl, #2
+
+  while(--i >= 0)
+ a04:	e2455001 	sub	r5, r5, #1
+  do{
+    y = div(x, b);
+    buf[i++] = digits[x - y * b];
+  }while((x = y) != 0);
+  if(neg)
+    buf[i++] = '-';
+ a08:	13a0202d 	movne	r2, #45	; 0x2d
+ a0c:	15432010 	strbne	r2, [r3, #-16]
+
+  while(--i >= 0)
+    putc(fd, buf[i]);
+ a10:	e7d61005 	ldrb	r1, [r6, r5]
+ a14:	e1a00004 	mov	r0, r4
+    buf[i++] = digits[x - y * b];
+  }while((x = y) != 0);
+  if(neg)
+    buf[i++] = '-';
+
+  while(--i >= 0)
+ a18:	e2455001 	sub	r5, r5, #1
+    putc(fd, buf[i]);
+ a1c:	ebffffc7 	bl	940 <putc>
+    buf[i++] = digits[x - y * b];
+  }while((x = y) != 0);
+  if(neg)
+    buf[i++] = '-';
+
+  while(--i >= 0)
+ a20:	e3750001 	cmn	r5, #1
+ a24:	1afffff9 	bne	a10 <printint+0xa8>
+    putc(fd, buf[i]);
+}
+ a28:	e24bd020 	sub	sp, fp, #32
+ a2c:	e8bd8ff0 	pop	{r4, r5, r6, r7, r8, r9, sl, fp, pc}
+ a30:	00000db4 	.word	0x00000db4
+
+00000a34 <div>:
+  write(fd, &c, 1);
+}
+
+u32 div(u32 n, u32 d)  // long division
+{
+    u32 q=0, r=0;
+ a34:	e3a03000 	mov	r3, #0
+{
+  write(fd, &c, 1);
+}
+
+u32 div(u32 n, u32 d)  // long division
+{
+ a38:	e92d0830 	push	{r4, r5, fp}
+ a3c:	e1a02000 	mov	r2, r0
+ a40:	e28db008 	add	fp, sp, #8
+    u32 q=0, r=0;
+    int i;
+
+    for(i=31;i>=0;i--){
+ a44:	e3a0c01f 	mov	ip, #31
+  write(fd, &c, 1);
+}
+
+u32 div(u32 n, u32 d)  // long division
+{
+    u32 q=0, r=0;
+ a48:	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);
+ a4c:	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);
+ a50:	e1a04c32 	lsr	r4, r2, ip
+ a54:	e2044001 	and	r4, r4, #1
+ a58:	e1843083 	orr	r3, r4, r3, lsl #1
+        if(r >= d) {
+ a5c:	e1530001 	cmp	r3, r1
+            r = r - d;
+            q = q | (1 << i);
+ a60:	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;
+ a64:	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--){
+ a68:	e25cc001 	subs	ip, ip, #1
+ a6c:	2afffff7 	bcs	a50 <div+0x1c>
+            r = r - d;
+            q = q | (1 << i);
+        }
+    }
+    return q;
+}
+ a70:	e24bd008 	sub	sp, fp, #8
+ a74:	e8bd0830 	pop	{r4, r5, fp}
+ a78:	e12fff1e 	bx	lr
+
+00000a7c <printf>:
+}
+
+// Print to the given fd. Only understands %d, %x, %p, %s.
+void
+printf(int fd, char *fmt, ...)
+{
+ a7c:	e92d000e 	push	{r1, r2, r3}
+ a80:	e92d4ff0 	push	{r4, r5, r6, r7, r8, r9, sl, fp, lr}
+ a84:	e28db020 	add	fp, sp, #32
+ a88:	e1a05000 	mov	r5, r0
+  int c, i, state;
+  uint *ap;
+
+  state = 0;
+  ap = (uint*)(void*)&fmt + 1;
+  for(i = 0; fmt[i]; i++){
+ a8c:	e59b4004 	ldr	r4, [fp, #4]
+ a90:	e5d48000 	ldrb	r8, [r4]
+ a94:	e3580000 	cmp	r8, #0
+ a98:	0a000027 	beq	b3c <printf+0xc0>
+        ap++;
+      } else if(c == 's'){
+        s = (char*)*ap;
+        ap++;
+        if(s == 0)
+          s = "(null)";
+ a9c:	e59f712c 	ldr	r7, [pc, #300]	; bd0 <printf+0x154>
+  char *s;
+  int c, i, state;
+  uint *ap;
+
+  state = 0;
+  ap = (uint*)(void*)&fmt + 1;
+ aa0:	e28b6008 	add	r6, fp, #8
+{
+  char *s;
+  int c, i, state;
+  uint *ap;
+
+  state = 0;
+ aa4:	e3a0a000 	mov	sl, #0
+ aa8:	ea000008 	b	ad0 <printf+0x54>
+  ap = (uint*)(void*)&fmt + 1;
+  for(i = 0; fmt[i]; i++){
+    c = fmt[i] & 0xff;
+    if(state == 0){
+      if(c == '%'){
+ aac:	e3580025 	cmp	r8, #37	; 0x25
+        state = '%';
+ ab0:	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 == '%'){
+ ab4:	0a000002 	beq	ac4 <printf+0x48>
+        state = '%';
+      } else {
+        putc(fd, c);
+ ab8:	e1a00005 	mov	r0, r5
+ abc:	e1a01008 	mov	r1, r8
+ ac0:	ebffff9e 	bl	940 <putc>
+  int c, i, state;
+  uint *ap;
+
+  state = 0;
+  ap = (uint*)(void*)&fmt + 1;
+  for(i = 0; fmt[i]; i++){
+ ac4:	e5f48001 	ldrb	r8, [r4, #1]!
+ ac8:	e3580000 	cmp	r8, #0
+ acc:	0a00001a 	beq	b3c <printf+0xc0>
+    c = fmt[i] & 0xff;
+    if(state == 0){
+ ad0:	e35a0000 	cmp	sl, #0
+ ad4:	0afffff4 	beq	aac <printf+0x30>
+      if(c == '%'){
+        state = '%';
+      } else {
+        putc(fd, c);
+      }
+    } else if(state == '%'){
+ ad8:	e35a0025 	cmp	sl, #37	; 0x25
+ adc:	1afffff8 	bne	ac4 <printf+0x48>
+      if(c == 'd'){
+ ae0:	e3580064 	cmp	r8, #100	; 0x64
+ ae4:	0a00002c 	beq	b9c <printf+0x120>
+        printint(fd, *ap, 10, 1);
+        ap++;
+      } else if(c == 'x' || c == 'p'){
+ ae8:	e3580078 	cmp	r8, #120	; 0x78
+ aec:	13580070 	cmpne	r8, #112	; 0x70
+ af0:	13a09000 	movne	r9, #0
+ af4:	03a09001 	moveq	r9, #1
+ af8:	0a000013 	beq	b4c <printf+0xd0>
+        printint(fd, *ap, 16, 0);
+        ap++;
+      } else if(c == 's'){
+ afc:	e3580073 	cmp	r8, #115	; 0x73
+ b00:	0a000018 	beq	b68 <printf+0xec>
+          s = "(null)";
+        while(*s != 0){
+          putc(fd, *s);
+          s++;
+        }
+      } else if(c == 'c'){
+ b04:	e3580063 	cmp	r8, #99	; 0x63
+ b08:	0a00002a 	beq	bb8 <printf+0x13c>
+        putc(fd, *ap);
+        ap++;
+      } else if(c == '%'){
+ b0c:	e3580025 	cmp	r8, #37	; 0x25
+        putc(fd, c);
+ b10:	e1a0100a 	mov	r1, sl
+ b14:	e1a00005 	mov	r0, r5
+          s++;
+        }
+      } else if(c == 'c'){
+        putc(fd, *ap);
+        ap++;
+      } else if(c == '%'){
+ b18:	0a000002 	beq	b28 <printf+0xac>
+        putc(fd, c);
+      } else {
+        // Unknown % sequence.  Print it to draw attention.
+        putc(fd, '%');
+ b1c:	ebffff87 	bl	940 <putc>
+        putc(fd, c);
+ b20:	e1a00005 	mov	r0, r5
+ b24:	e1a01008 	mov	r1, r8
+ b28:	ebffff84 	bl	940 <putc>
+  int c, i, state;
+  uint *ap;
+
+  state = 0;
+  ap = (uint*)(void*)&fmt + 1;
+  for(i = 0; fmt[i]; i++){
+ b2c:	e5f48001 	ldrb	r8, [r4, #1]!
+      } else {
+        // Unknown % sequence.  Print it to draw attention.
+        putc(fd, '%');
+        putc(fd, c);
+      }
+      state = 0;
+ b30:	e1a0a009 	mov	sl, r9
+  int c, i, state;
+  uint *ap;
+
+  state = 0;
+  ap = (uint*)(void*)&fmt + 1;
+  for(i = 0; fmt[i]; i++){
+ b34:	e3580000 	cmp	r8, #0
+ b38:	1affffe4 	bne	ad0 <printf+0x54>
+        putc(fd, c);
+      }
+      state = 0;
+    }
+  }
+}
+ b3c:	e24bd020 	sub	sp, fp, #32
+ b40:	e8bd4ff0 	pop	{r4, r5, r6, r7, r8, r9, sl, fp, lr}
+ b44:	e28dd00c 	add	sp, sp, #12
+ b48:	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);
+ b4c:	e1a00005 	mov	r0, r5
+ b50:	e4961004 	ldr	r1, [r6], #4
+ b54:	e3a02010 	mov	r2, #16
+ b58:	e3a03000 	mov	r3, #0
+ b5c:	ebffff81 	bl	968 <printint>
+      } else {
+        // Unknown % sequence.  Print it to draw attention.
+        putc(fd, '%');
+        putc(fd, c);
+      }
+      state = 0;
+ b60:	e3a0a000 	mov	sl, #0
+ b64:	eaffffd6 	b	ac4 <printf+0x48>
+        ap++;
+      } else if(c == 'x' || c == 'p'){
+        printint(fd, *ap, 16, 0);
+        ap++;
+      } else if(c == 's'){
+        s = (char*)*ap;
+ b68:	e4968004 	ldr	r8, [r6], #4
+        ap++;
+        if(s == 0)
+          s = "(null)";
+ b6c:	e3580000 	cmp	r8, #0
+ b70:	01a08007 	moveq	r8, r7
+        while(*s != 0){
+ b74:	e5d81000 	ldrb	r1, [r8]
+ b78:	e3510000 	cmp	r1, #0
+ b7c:	0a000004 	beq	b94 <printf+0x118>
+          putc(fd, *s);
+ b80:	e1a00005 	mov	r0, r5
+ b84:	ebffff6d 	bl	940 <putc>
+      } else if(c == 's'){
+        s = (char*)*ap;
+        ap++;
+        if(s == 0)
+          s = "(null)";
+        while(*s != 0){
+ b88:	e5f81001 	ldrb	r1, [r8, #1]!
+ b8c:	e3510000 	cmp	r1, #0
+ b90:	1afffffa 	bne	b80 <printf+0x104>
+      } else {
+        // Unknown % sequence.  Print it to draw attention.
+        putc(fd, '%');
+        putc(fd, c);
+      }
+      state = 0;
+ b94:	e1a0a001 	mov	sl, r1
+ b98:	eaffffc9 	b	ac4 <printf+0x48>
+      } else {
+        putc(fd, c);
+      }
+    } else if(state == '%'){
+      if(c == 'd'){
+        printint(fd, *ap, 10, 1);
+ b9c:	e1a00005 	mov	r0, r5
+ ba0:	e4961004 	ldr	r1, [r6], #4
+ ba4:	e3a0200a 	mov	r2, #10
+ ba8:	e3a03001 	mov	r3, #1
+ bac:	ebffff6d 	bl	968 <printint>
+      } else {
+        // Unknown % sequence.  Print it to draw attention.
+        putc(fd, '%');
+        putc(fd, c);
+      }
+      state = 0;
+ bb0:	e3a0a000 	mov	sl, #0
+ bb4:	eaffffc2 	b	ac4 <printf+0x48>
+        while(*s != 0){
+          putc(fd, *s);
+          s++;
+        }
+      } else if(c == 'c'){
+        putc(fd, *ap);
+ bb8:	e4961004 	ldr	r1, [r6], #4
+ bbc:	e1a00005 	mov	r0, r5
+      } else {
+        // Unknown % sequence.  Print it to draw attention.
+        putc(fd, '%');
+        putc(fd, c);
+      }
+      state = 0;
+ bc0:	e1a0a009 	mov	sl, r9
+        while(*s != 0){
+          putc(fd, *s);
+          s++;
+        }
+      } else if(c == 'c'){
+        putc(fd, *ap);
+ bc4:	e6ef1071 	uxtb	r1, r1
+ bc8:	ebffff5c 	bl	940 <putc>
+ bcc:	eaffffbc 	b	ac4 <printf+0x48>
+ bd0:	00000dc8 	.word	0x00000dc8
+
+00000bd4 <free>:
+free(void *ap)
+{
+  Header *bp, *p;
+
+  bp = (Header*)ap - 1;
+  for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr)
+ bd4:	e59f3098 	ldr	r3, [pc, #152]	; c74 <free+0xa0>
+static Header base;
+static Header *freep;
+
+void
+free(void *ap)
+{
+ bd8:	e92d0830 	push	{r4, r5, fp}
+  Header *bp, *p;
+
+  bp = (Header*)ap - 1;
+ bdc:	e240c008 	sub	ip, r0, #8
+  for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr)
+ be0:	e5932000 	ldr	r2, [r3]
+static Header base;
+static Header *freep;
+
+void
+free(void *ap)
+{
+ be4:	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)
+ be8:	e152000c 	cmp	r2, ip
+ bec:	e5921000 	ldr	r1, [r2]
+ bf0:	2a000001 	bcs	bfc <free+0x28>
+ bf4:	e15c0001 	cmp	ip, r1
+ bf8:	3a000007 	bcc	c1c <free+0x48>
+    if(p >= p->s.ptr && (bp > p || bp < p->s.ptr))
+ bfc:	e1520001 	cmp	r2, r1
+ c00:	3a000003 	bcc	c14 <free+0x40>
+ c04:	e152000c 	cmp	r2, ip
+ c08:	3a000003 	bcc	c1c <free+0x48>
+ c0c:	e15c0001 	cmp	ip, r1
+ c10:	3a000001 	bcc	c1c <free+0x48>
+static Header base;
+static Header *freep;
+
+void
+free(void *ap)
+{
+ c14:	e1a02001 	mov	r2, r1
+ c18:	eafffff2 	b	be8 <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){
+ c1c:	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;
+ c20:	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){
+ c24:	e08c5184 	add	r5, ip, r4, lsl #3
+ c28:	e1550001 	cmp	r5, r1
+    bp->s.size += p->s.ptr->s.size;
+ c2c:	05911004 	ldreq	r1, [r1, #4]
+ c30:	00814004 	addeq	r4, r1, r4
+ c34:	05004004 	streq	r4, [r0, #-4]
+    bp->s.ptr = p->s.ptr->s.ptr;
+ c38:	05921000 	ldreq	r1, [r2]
+ c3c:	05911000 	ldreq	r1, [r1]
+  } else
+    bp->s.ptr = p->s.ptr;
+ c40:	e5001008 	str	r1, [r0, #-8]
+  if(p + p->s.size == bp){
+ c44:	e5921004 	ldr	r1, [r2, #4]
+ c48:	e0824181 	add	r4, r2, r1, lsl #3
+ c4c:	e15c0004 	cmp	ip, r4
+    p->s.size += bp->s.size;
+    p->s.ptr = bp->s.ptr;
+  } else
+    p->s.ptr = bp;
+ c50:	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;
+ c54:	0510c004 	ldreq	ip, [r0, #-4]
+ c58:	008c1001 	addeq	r1, ip, r1
+ c5c:	05821004 	streq	r1, [r2, #4]
+    p->s.ptr = bp->s.ptr;
+ c60:	05101008 	ldreq	r1, [r0, #-8]
+ c64:	05821000 	streq	r1, [r2]
+  } else
+    p->s.ptr = bp;
+  freep = p;
+}
+ c68:	e24bd008 	sub	sp, fp, #8
+ c6c:	e8bd0830 	pop	{r4, r5, fp}
+ c70:	e12fff1e 	bx	lr
+ c74:	00000de0 	.word	0x00000de0
+
+00000c78 <malloc>:
+  return freep;
+}
+
+void*
+malloc(uint nbytes)
+{
+ c78:	e92d49f8 	push	{r3, r4, r5, r6, r7, r8, fp, lr}
+  Header *p, *prevp;
+  uint nunits;
+
+  nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
+ c7c:	e2804007 	add	r4, r0, #7
+  if((prevp = freep) == 0){
+ c80:	e59f50d4 	ldr	r5, [pc, #212]	; d5c <malloc+0xe4>
+malloc(uint nbytes)
+{
+  Header *p, *prevp;
+  uint nunits;
+
+  nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
+ c84:	e1a041a4 	lsr	r4, r4, #3
+  return freep;
+}
+
+void*
+malloc(uint nbytes)
+{
+ c88:	e28db01c 	add	fp, sp, #28
+  Header *p, *prevp;
+  uint nunits;
+
+  nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
+  if((prevp = freep) == 0){
+ c8c:	e5953000 	ldr	r3, [r5]
+malloc(uint nbytes)
+{
+  Header *p, *prevp;
+  uint nunits;
+
+  nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
+ c90:	e2844001 	add	r4, r4, #1
+  if((prevp = freep) == 0){
+ c94:	e3530000 	cmp	r3, #0
+ c98:	0a00002b 	beq	d4c <malloc+0xd4>
+ c9c:	e5930000 	ldr	r0, [r3]
+ ca0:	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){
+ ca4:	e1520004 	cmp	r2, r4
+ ca8:	2a00001b 	bcs	d1c <malloc+0xa4>
+morecore(uint nu)
+{
+  char *p;
+  Header *hp;
+
+  if(nu < 4096)
+ cac:	e59f80ac 	ldr	r8, [pc, #172]	; d60 <malloc+0xe8>
+        p->s.size -= nunits;
+        p += p->s.size;
+        p->s.size = nunits;
+      }
+      freep = prevp;
+      return (void*)(p + 1);
+ cb0:	e1a07184 	lsl	r7, r4, #3
+ cb4:	ea000003 	b	cc8 <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){
+ cb8:	e5930000 	ldr	r0, [r3]
+    if(p->s.size >= nunits){
+ cbc:	e5902004 	ldr	r2, [r0, #4]
+ cc0:	e1540002 	cmp	r4, r2
+ cc4:	9a000014 	bls	d1c <malloc+0xa4>
+        p->s.size = nunits;
+      }
+      freep = prevp;
+      return (void*)(p + 1);
+    }
+    if(p == freep)
+ cc8:	e5952000 	ldr	r2, [r5]
+ ccc:	e1a03000 	mov	r3, r0
+ cd0:	e1500002 	cmp	r0, r2
+ cd4:	1afffff7 	bne	cb8 <malloc+0x40>
+morecore(uint nu)
+{
+  char *p;
+  Header *hp;
+
+  if(nu < 4096)
+ cd8:	e1540008 	cmp	r4, r8
+    nu = 4096;
+  p = sbrk(nu * sizeof(Header));
+ cdc:	81a00007 	movhi	r0, r7
+ ce0:	93a00902 	movls	r0, #32768	; 0x8000
+morecore(uint nu)
+{
+  char *p;
+  Header *hp;
+
+  if(nu < 4096)
+ ce4:	81a06004 	movhi	r6, r4
+ ce8:	93a06a01 	movls	r6, #4096	; 0x1000
+    nu = 4096;
+  p = sbrk(nu * sizeof(Header));
+ cec:	ebfffeec 	bl	8a4 <sbrk>
+ cf0:	e1a03000 	mov	r3, r0
+  if(p == (char*)-1)
+ cf4:	e3730001 	cmn	r3, #1
+    return 0;
+  hp = (Header*)p;
+  hp->s.size = nu;
+  free((void*)(hp + 1));
+ cf8:	e2800008 	add	r0, r0, #8
+  Header *hp;
+
+  if(nu < 4096)
+    nu = 4096;
+  p = sbrk(nu * sizeof(Header));
+  if(p == (char*)-1)
+ cfc:	0a000010 	beq	d44 <malloc+0xcc>
+    return 0;
+  hp = (Header*)p;
+  hp->s.size = nu;
+ d00:	e5836004 	str	r6, [r3, #4]
+  free((void*)(hp + 1));
+ d04:	ebffffb2 	bl	bd4 <free>
+  return freep;
+ d08:	e5953000 	ldr	r3, [r5]
+      }
+      freep = prevp;
+      return (void*)(p + 1);
+    }
+    if(p == freep)
+      if((p = morecore(nunits)) == 0)
+ d0c:	e3530000 	cmp	r3, #0
+ d10:	1affffe8 	bne	cb8 <malloc+0x40>
+        return 0;
+ d14:	e1a00003 	mov	r0, r3
+  }
+}
+ d18:	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)
+ d1c:	e1540002 	cmp	r4, r2
+        prevp->s.ptr = p->s.ptr;
+      else {
+        p->s.size -= nunits;
+ d20:	10642002 	rsbne	r2, r4, r2
+ d24:	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;
+ d28:	05902000 	ldreq	r2, [r0]
+      else {
+        p->s.size -= nunits;
+        p += p->s.size;
+ d2c:	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;
+ d30:	05832000 	streq	r2, [r3]
+      else {
+        p->s.size -= nunits;
+        p += p->s.size;
+        p->s.size = nunits;
+ d34:	15804004 	strne	r4, [r0, #4]
+      }
+      freep = prevp;
+ d38:	e5853000 	str	r3, [r5]
+      return (void*)(p + 1);
+ d3c:	e2800008 	add	r0, r0, #8
+ d40:	e8bd89f8 	pop	{r3, r4, r5, r6, r7, r8, fp, pc}
+    }
+    if(p == freep)
+      if((p = morecore(nunits)) == 0)
+        return 0;
+ d44:	e3a00000 	mov	r0, #0
+ d48:	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;
+ d4c:	e2850004 	add	r0, r5, #4
+ d50:	e5850000 	str	r0, [r5]
+    base.s.size = 0;
+ d54:	e9850009 	stmib	r5, {r0, r3}
+ d58:	eaffffd3 	b	cac <malloc+0x34>
+ d5c:	00000de0 	.word	0x00000de0
+ d60:	00000fff 	.word	0x00000fff