_zombie:     file format elf32-i386

Disassembly of section .text:

00000000 <main>:
#include "user.h"

int
main(void)
{
   0:	8d 4c 24 04          	lea    0x4(%esp),%ecx
   4:	83 e4 f0             	and    $0xfffffff0,%esp
   7:	ff 71 fc             	pushl  0xfffffffc(%ecx)
   a:	55                   	push   %ebp
   b:	89 e5                	mov    %esp,%ebp
   d:	51                   	push   %ecx
   e:	83 ec 04             	sub    $0x4,%esp
  if(fork() > 0)
  11:	e8 2e 02 00 00       	call   244 <fork>
  16:	85 c0                	test   %eax,%eax
  18:	7e 0c                	jle    26 <main+0x26>
    sleep(5);  // Let child exit before parent.
  1a:	c7 04 24 05 00 00 00 	movl   $0x5,(%esp)
  21:	e8 b6 02 00 00       	call   2dc <sleep>
  exit();
  26:	e8 21 02 00 00       	call   24c <exit>
  2b:	90                   	nop    
  2c:	90                   	nop    
  2d:	90                   	nop    
  2e:	90                   	nop    
  2f:	90                   	nop    

00000030 <strcpy>:
#include "user.h"

char*
strcpy(char *s, char *t)
{
  30:	55                   	push   %ebp
  31:	89 e5                	mov    %esp,%ebp
  33:	53                   	push   %ebx
  34:	8b 5d 08             	mov    0x8(%ebp),%ebx
  37:	8b 4d 0c             	mov    0xc(%ebp),%ecx
  3a:	89 da                	mov    %ebx,%edx
  3c:	8d 74 26 00          	lea    0x0(%esi),%esi
  char *os;

  os = s;
  while((*s++ = *t++) != 0)
  40:	0f b6 01             	movzbl (%ecx),%eax
  43:	41                   	inc    %ecx
  44:	88 02                	mov    %al,(%edx)
  46:	42                   	inc    %edx
  47:	84 c0                	test   %al,%al
  49:	75 f5                	jne    40 <strcpy+0x10>
    ;
  return os;
}
  4b:	89 d8                	mov    %ebx,%eax
  4d:	5b                   	pop    %ebx
  4e:	5d                   	pop    %ebp
  4f:	c3                   	ret    

00000050 <strcmp>:

int
strcmp(const char *p, const char *q)
{
  50:	55                   	push   %ebp
  51:	89 e5                	mov    %esp,%ebp
  53:	8b 55 08             	mov    0x8(%ebp),%edx
  56:	8b 4d 0c             	mov    0xc(%ebp),%ecx
  while(*p && *p == *q)
  59:	0f b6 02             	movzbl (%edx),%eax
  5c:	84 c0                	test   %al,%al
  5e:	75 0c                	jne    6c <strcmp+0x1c>
  60:	eb 10                	jmp    72 <strcmp+0x22>
  62:	0f b6 42 01          	movzbl 0x1(%edx),%eax
    p++, q++;
  66:	41                   	inc    %ecx
  67:	84 c0                	test   %al,%al
  69:	74 07                	je     72 <strcmp+0x22>
  6b:	42                   	inc    %edx
  6c:	3a 01                	cmp    (%ecx),%al
  6e:	89 f6                	mov    %esi,%esi
  70:	74 f0                	je     62 <strcmp+0x12>
  72:	0f b6 11             	movzbl (%ecx),%edx
  75:	0f b6 c0             	movzbl %al,%eax
  return (uchar)*p - (uchar)*q;
}
  78:	5d                   	pop    %ebp
  79:	29 d0                	sub    %edx,%eax
  7b:	c3                   	ret    
  7c:	8d 74 26 00          	lea    0x0(%esi),%esi

00000080 <strlen>:

uint
strlen(char *s)
{
  80:	55                   	push   %ebp
  int n;

  for(n = 0; s[n]; n++)
  81:	31 c0                	xor    %eax,%eax
  83:	89 e5                	mov    %esp,%ebp
  85:	8b 55 08             	mov    0x8(%ebp),%edx
  88:	80 3a 00             	cmpb   $0x0,(%edx)
  8b:	74 0a                	je     97 <strlen+0x17>
  8d:	8d 76 00             	lea    0x0(%esi),%esi
  90:	40                   	inc    %eax
  91:	80 3c 10 00          	cmpb   $0x0,(%eax,%edx,1)
  95:	75 f9                	jne    90 <strlen+0x10>
    ;
  return n;
}
  97:	5d                   	pop    %ebp
  98:	c3                   	ret    
  99:	8d b4 26 00 00 00 00 	lea    0x0(%esi),%esi

000000a0 <memset>:

void*
memset(void *dst, int c, uint n)
{
  a0:	55                   	push   %ebp
  a1:	89 e5                	mov    %esp,%ebp
  a3:	8b 45 10             	mov    0x10(%ebp),%eax
  a6:	53                   	push   %ebx
  a7:	8b 5d 08             	mov    0x8(%ebp),%ebx
  char *d;
  
  d = dst;
  while(n-- > 0)
  aa:	85 c0                	test   %eax,%eax
  ac:	74 1a                	je     c8 <memset+0x28>
  ae:	0f b6 4d 0c          	movzbl 0xc(%ebp),%ecx
  b2:	31 d2                	xor    %edx,%edx
  b4:	8d b6 00 00 00 00    	lea    0x0(%esi),%esi
  ba:	8d bf 00 00 00 00    	lea    0x0(%edi),%edi
    *d++ = c;
  c0:	88 0c 1a             	mov    %cl,(%edx,%ebx,1)
  c3:	42                   	inc    %edx
  c4:	39 d0                	cmp    %edx,%eax
  c6:	75 f8                	jne    c0 <memset+0x20>
  return dst;
}
  c8:	89 d8                	mov    %ebx,%eax
  ca:	5b                   	pop    %ebx
  cb:	5d                   	pop    %ebp
  cc:	c3                   	ret    
  cd:	8d 76 00             	lea    0x0(%esi),%esi

000000d0 <strchr>:

char*
strchr(const char *s, char c)
{
  d0:	55                   	push   %ebp
  d1:	89 e5                	mov    %esp,%ebp
  d3:	8b 45 08             	mov    0x8(%ebp),%eax
  d6:	0f b6 4d 0c          	movzbl 0xc(%ebp),%ecx
  for(; *s; s++)
  da:	0f b6 10             	movzbl (%eax),%edx
  dd:	84 d2                	test   %dl,%dl
  df:	74 19                	je     fa <strchr+0x2a>
    if(*s == c)
  e1:	38 d1                	cmp    %dl,%cl
  e3:	75 0d                	jne    f2 <strchr+0x22>
  e5:	eb 15                	jmp    fc <strchr+0x2c>
  e7:	38 ca                	cmp    %cl,%dl
  e9:	8d b4 26 00 00 00 00 	lea    0x0(%esi),%esi
  f0:	74 0a                	je     fc <strchr+0x2c>
  f2:	40                   	inc    %eax
  f3:	0f b6 10             	movzbl (%eax),%edx
  f6:	84 d2                	test   %dl,%dl
  f8:	75 ed                	jne    e7 <strchr+0x17>
  fa:	31 c0                	xor    %eax,%eax
      return (char*) s;
  return 0;
}
  fc:	5d                   	pop    %ebp
  fd:	c3                   	ret    
  fe:	89 f6                	mov    %esi,%esi

00000100 <atoi>:

char*
gets(char *buf, int max)
{
  int i, cc;
  char c;

  for(i=0; i+1 < max; ){
    cc = read(0, &c, 1);
    if(cc < 1)
      break;
    buf[i++] = c;
    if(c == '\n' || c == '\r')
      break;
  }
  buf[i] = '\0';
  return buf;
}

int
stat(char *n, struct stat *st)
{
  int fd;
  int r;

  fd = open(n, O_RDONLY);
  if(fd < 0)
    return -1;
  r = fstat(fd, st);
  close(fd);
  return r;
}

int
atoi(const char *s)
{
 100:	55                   	push   %ebp
 101:	89 e5                	mov    %esp,%ebp
 103:	8b 4d 08             	mov    0x8(%ebp),%ecx
 106:	53                   	push   %ebx
  int n;

  n = 0;
  while('0' <= *s && *s <= '9')
 107:	31 db                	xor    %ebx,%ebx
 109:	0f b6 11             	movzbl (%ecx),%edx
 10c:	88 d0                	mov    %dl,%al
 10e:	2c 30                	sub    $0x30,%al
 110:	3c 09                	cmp    $0x9,%al
 112:	77 23                	ja     137 <atoi+0x37>
 114:	8d b6 00 00 00 00    	lea    0x0(%esi),%esi
 11a:	8d bf 00 00 00 00    	lea    0x0(%edi),%edi
    n = n*10 + *s++ - '0';
 120:	8d 04 9b             	lea    (%ebx,%ebx,4),%eax
 123:	0f be d2             	movsbl %dl,%edx
 126:	8d 5c 42 d0          	lea    0xffffffd0(%edx,%eax,2),%ebx
 12a:	0f b6 51 01          	movzbl 0x1(%ecx),%edx
 12e:	41                   	inc    %ecx
 12f:	88 d0                	mov    %dl,%al
 131:	2c 30                	sub    $0x30,%al
 133:	3c 09                	cmp    $0x9,%al
 135:	76 e9                	jbe    120 <atoi+0x20>
  return n;
}
 137:	89 d8                	mov    %ebx,%eax
 139:	5b                   	pop    %ebx
 13a:	5d                   	pop    %ebp
 13b:	c3                   	ret    
 13c:	8d 74 26 00          	lea    0x0(%esi),%esi

00000140 <memmove>:

void*
memmove(void *vdst, void *vsrc, int n)
{
 140:	55                   	push   %ebp
 141:	89 e5                	mov    %esp,%ebp
 143:	8b 4d 10             	mov    0x10(%ebp),%ecx
 146:	56                   	push   %esi
 147:	8b 75 08             	mov    0x8(%ebp),%esi
 14a:	53                   	push   %ebx
 14b:	8b 5d 0c             	mov    0xc(%ebp),%ebx
  char *dst, *src;
  
  dst = vdst;
  src = vsrc;
  while(n-- > 0)
 14e:	85 c9                	test   %ecx,%ecx
 150:	7e 1a                	jle    16c <memmove+0x2c>
 152:	31 d2                	xor    %edx,%edx
 154:	8d b6 00 00 00 00    	lea    0x0(%esi),%esi
 15a:	8d bf 00 00 00 00    	lea    0x0(%edi),%edi
    *dst++ = *src++;
 160:	0f b6 04 1a          	movzbl (%edx,%ebx,1),%eax
 164:	88 04 32             	mov    %al,(%edx,%esi,1)
 167:	42                   	inc    %edx
 168:	39 ca                	cmp    %ecx,%edx
 16a:	75 f4                	jne    160 <memmove+0x20>
  return vdst;
}
 16c:	5b                   	pop    %ebx
 16d:	89 f0                	mov    %esi,%eax
 16f:	5e                   	pop    %esi
 170:	5d                   	pop    %ebp
 171:	c3                   	ret    
 172:	8d b4 26 00 00 00 00 	lea    0x0(%esi),%esi
 179:	8d bc 27 00 00 00 00 	lea    0x0(%edi),%edi

00000180 <stat>:
 180:	55                   	push   %ebp
 181:	31 c0                	xor    %eax,%eax
 183:	89 e5                	mov    %esp,%ebp
 185:	83 ec 18             	sub    $0x18,%esp
 188:	89 44 24 04          	mov    %eax,0x4(%esp)
 18c:	8b 45 08             	mov    0x8(%ebp),%eax
 18f:	89 5d f8             	mov    %ebx,0xfffffff8(%ebp)
 192:	89 75 fc             	mov    %esi,0xfffffffc(%ebp)
 195:	be ff ff ff ff       	mov    $0xffffffff,%esi
 19a:	89 04 24             	mov    %eax,(%esp)
 19d:	e8 ea 00 00 00       	call   28c <open>
 1a2:	85 c0                	test   %eax,%eax
 1a4:	89 c3                	mov    %eax,%ebx
 1a6:	78 19                	js     1c1 <stat+0x41>
 1a8:	8b 45 0c             	mov    0xc(%ebp),%eax
 1ab:	89 1c 24             	mov    %ebx,(%esp)
 1ae:	89 44 24 04          	mov    %eax,0x4(%esp)
 1b2:	e8 ed 00 00 00       	call   2a4 <fstat>
 1b7:	89 1c 24             	mov    %ebx,(%esp)
 1ba:	89 c6                	mov    %eax,%esi
 1bc:	e8 b3 00 00 00       	call   274 <close>
 1c1:	89 f0                	mov    %esi,%eax
 1c3:	8b 5d f8             	mov    0xfffffff8(%ebp),%ebx
 1c6:	8b 75 fc             	mov    0xfffffffc(%ebp),%esi
 1c9:	89 ec                	mov    %ebp,%esp
 1cb:	5d                   	pop    %ebp
 1cc:	c3                   	ret    
 1cd:	8d 76 00             	lea    0x0(%esi),%esi

000001d0 <gets>:
 1d0:	55                   	push   %ebp
 1d1:	89 e5                	mov    %esp,%ebp
 1d3:	57                   	push   %edi
 1d4:	56                   	push   %esi
 1d5:	31 f6                	xor    %esi,%esi
 1d7:	53                   	push   %ebx
 1d8:	83 ec 1c             	sub    $0x1c,%esp
 1db:	8d 5e 01             	lea    0x1(%esi),%ebx
 1de:	8b 7d 08             	mov    0x8(%ebp),%edi
 1e1:	3b 5d 0c             	cmp    0xc(%ebp),%ebx
 1e4:	7d 3e                	jge    224 <gets+0x54>
 1e6:	ba 01 00 00 00       	mov    $0x1,%edx
 1eb:	8d 45 f3             	lea    0xfffffff3(%ebp),%eax
 1ee:	89 54 24 08          	mov    %edx,0x8(%esp)
 1f2:	89 44 24 04          	mov    %eax,0x4(%esp)
 1f6:	c7 04 24 00 00 00 00 	movl   $0x0,(%esp)
 1fd:	e8 62 00 00 00       	call   264 <read>
 202:	85 c0                	test   %eax,%eax
 204:	7e 1e                	jle    224 <gets+0x54>
 206:	0f b6 45 f3          	movzbl 0xfffffff3(%ebp),%eax
 20a:	88 44 3b ff          	mov    %al,0xffffffff(%ebx,%edi,1)
 20e:	0f b6 45 f3          	movzbl 0xfffffff3(%ebp),%eax
 212:	3c 0a                	cmp    $0xa,%al
 214:	74 1c                	je     232 <gets+0x62>
 216:	3c 0d                	cmp    $0xd,%al
 218:	74 18                	je     232 <gets+0x62>
 21a:	89 de                	mov    %ebx,%esi
 21c:	8d 5e 01             	lea    0x1(%esi),%ebx
 21f:	3b 5d 0c             	cmp    0xc(%ebp),%ebx
 222:	7c c2                	jl     1e6 <gets+0x16>
 224:	c6 04 3e 00          	movb   $0x0,(%esi,%edi,1)
 228:	83 c4 1c             	add    $0x1c,%esp
 22b:	89 f8                	mov    %edi,%eax
 22d:	5b                   	pop    %ebx
 22e:	5e                   	pop    %esi
 22f:	5f                   	pop    %edi
 230:	5d                   	pop    %ebp
 231:	c3                   	ret    
 232:	89 de                	mov    %ebx,%esi
 234:	89 f8                	mov    %edi,%eax
 236:	c6 04 3e 00          	movb   $0x0,(%esi,%edi,1)
 23a:	83 c4 1c             	add    $0x1c,%esp
 23d:	5b                   	pop    %ebx
 23e:	5e                   	pop    %esi
 23f:	5f                   	pop    %edi
 240:	5d                   	pop    %ebp
 241:	c3                   	ret    
 242:	90                   	nop    
 243:	90                   	nop    

00000244 <fork>:
 244:	b8 01 00 00 00       	mov    $0x1,%eax
 249:	cd 30                	int    $0x30
 24b:	c3                   	ret    

0000024c <exit>:
 24c:	b8 02 00 00 00       	mov    $0x2,%eax
 251:	cd 30                	int    $0x30
 253:	c3                   	ret    

00000254 <wait>:
 254:	b8 03 00 00 00       	mov    $0x3,%eax
 259:	cd 30                	int    $0x30
 25b:	c3                   	ret    

0000025c <pipe>:
 25c:	b8 04 00 00 00       	mov    $0x4,%eax
 261:	cd 30                	int    $0x30
 263:	c3                   	ret    

00000264 <read>:
 264:	b8 06 00 00 00       	mov    $0x6,%eax
 269:	cd 30                	int    $0x30
 26b:	c3                   	ret    

0000026c <write>:
 26c:	b8 05 00 00 00       	mov    $0x5,%eax
 271:	cd 30                	int    $0x30
 273:	c3                   	ret    

00000274 <close>:
 274:	b8 07 00 00 00       	mov    $0x7,%eax
 279:	cd 30                	int    $0x30
 27b:	c3                   	ret    

0000027c <kill>:
 27c:	b8 08 00 00 00       	mov    $0x8,%eax
 281:	cd 30                	int    $0x30
 283:	c3                   	ret    

00000284 <exec>:
 284:	b8 09 00 00 00       	mov    $0x9,%eax
 289:	cd 30                	int    $0x30
 28b:	c3                   	ret    

0000028c <open>:
 28c:	b8 0a 00 00 00       	mov    $0xa,%eax
 291:	cd 30                	int    $0x30
 293:	c3                   	ret    

00000294 <mknod>:
 294:	b8 0b 00 00 00       	mov    $0xb,%eax
 299:	cd 30                	int    $0x30
 29b:	c3                   	ret    

0000029c <unlink>:
 29c:	b8 0c 00 00 00       	mov    $0xc,%eax
 2a1:	cd 30                	int    $0x30
 2a3:	c3                   	ret    

000002a4 <fstat>:
 2a4:	b8 0d 00 00 00       	mov    $0xd,%eax
 2a9:	cd 30                	int    $0x30
 2ab:	c3                   	ret    

000002ac <link>:
 2ac:	b8 0e 00 00 00       	mov    $0xe,%eax
 2b1:	cd 30                	int    $0x30
 2b3:	c3                   	ret    

000002b4 <mkdir>:
 2b4:	b8 0f 00 00 00       	mov    $0xf,%eax
 2b9:	cd 30                	int    $0x30
 2bb:	c3                   	ret    

000002bc <chdir>:
 2bc:	b8 10 00 00 00       	mov    $0x10,%eax
 2c1:	cd 30                	int    $0x30
 2c3:	c3                   	ret    

000002c4 <dup>:
 2c4:	b8 11 00 00 00       	mov    $0x11,%eax
 2c9:	cd 30                	int    $0x30
 2cb:	c3                   	ret    

000002cc <getpid>:
 2cc:	b8 12 00 00 00       	mov    $0x12,%eax
 2d1:	cd 30                	int    $0x30
 2d3:	c3                   	ret    

000002d4 <sbrk>:
 2d4:	b8 13 00 00 00       	mov    $0x13,%eax
 2d9:	cd 30                	int    $0x30
 2db:	c3                   	ret    

000002dc <sleep>:
 2dc:	b8 14 00 00 00       	mov    $0x14,%eax
 2e1:	cd 30                	int    $0x30
 2e3:	c3                   	ret    
 2e4:	90                   	nop    
 2e5:	90                   	nop    
 2e6:	90                   	nop    
 2e7:	90                   	nop    
 2e8:	90                   	nop    
 2e9:	90                   	nop    
 2ea:	90                   	nop    
 2eb:	90                   	nop    
 2ec:	90                   	nop    
 2ed:	90                   	nop    
 2ee:	90                   	nop    
 2ef:	90                   	nop    

000002f0 <putc>:
#include "user.h"

static void
putc(int fd, char c)
{
 2f0:	55                   	push   %ebp
 2f1:	89 e5                	mov    %esp,%ebp
 2f3:	83 ec 18             	sub    $0x18,%esp
 2f6:	88 55 fc             	mov    %dl,0xfffffffc(%ebp)
  write(fd, &c, 1);
 2f9:	ba 01 00 00 00       	mov    $0x1,%edx
 2fe:	89 54 24 08          	mov    %edx,0x8(%esp)
 302:	8d 55 fc             	lea    0xfffffffc(%ebp),%edx
 305:	89 54 24 04          	mov    %edx,0x4(%esp)
 309:	89 04 24             	mov    %eax,(%esp)
 30c:	e8 5b ff ff ff       	call   26c <write>
}
 311:	c9                   	leave  
 312:	c3                   	ret    
 313:	8d b6 00 00 00 00    	lea    0x0(%esi),%esi
 319:	8d bc 27 00 00 00 00 	lea    0x0(%edi),%edi

00000320 <printint>:

static void
printint(int fd, int xx, int base, int sgn)
{
 320:	55                   	push   %ebp
 321:	89 e5                	mov    %esp,%ebp
 323:	57                   	push   %edi
 324:	56                   	push   %esi
 325:	89 ce                	mov    %ecx,%esi
 327:	53                   	push   %ebx
 328:	83 ec 1c             	sub    $0x1c,%esp
  static char digits[] = "0123456789ABCDEF";
  char buf[16];
  int i, neg;
  uint x;

  neg = 0;
  if(sgn && xx < 0){
 32b:	8b 5d 08             	mov    0x8(%ebp),%ebx
 32e:	89 45 dc             	mov    %eax,0xffffffdc(%ebp)
 331:	85 db                	test   %ebx,%ebx
 333:	74 04                	je     339 <printint+0x19>
 335:	85 d2                	test   %edx,%edx
 337:	78 62                	js     39b <printint+0x7b>
    neg = 1;
    x = -xx;
  } else {
    x = xx;
 339:	89 d0                	mov    %edx,%eax
 33b:	c7 45 e0 00 00 00 00 	movl   $0x0,0xffffffe0(%ebp)
 342:	31 db                	xor    %ebx,%ebx
 344:	8d 7d e4             	lea    0xffffffe4(%ebp),%edi
 347:	89 f6                	mov    %esi,%esi
 349:	8d bc 27 00 00 00 00 	lea    0x0(%edi),%edi
  }

  i = 0;
  do{
    buf[i++] = digits[x % base];
 350:	31 d2                	xor    %edx,%edx
 352:	f7 f6                	div    %esi
 354:	89 c1                	mov    %eax,%ecx
 356:	0f b6 82 a1 06 00 00 	movzbl 0x6a1(%edx),%eax
 35d:	88 04 3b             	mov    %al,(%ebx,%edi,1)
 360:	43                   	inc    %ebx
  }while((x /= base) != 0);
 361:	85 c9                	test   %ecx,%ecx
 363:	89 c8                	mov    %ecx,%eax
 365:	75 e9                	jne    350 <printint+0x30>
  if(neg)
 367:	8b 4d e0             	mov    0xffffffe0(%ebp),%ecx
 36a:	85 c9                	test   %ecx,%ecx
 36c:	74 06                	je     374 <printint+0x54>
    buf[i++] = '-';
 36e:	c6 44 1d e4 2d       	movb   $0x2d,0xffffffe4(%ebp,%ebx,1)
 373:	43                   	inc    %ebx

  while(--i >= 0)
 374:	4b                   	dec    %ebx
 375:	78 1c                	js     393 <printint+0x73>
 377:	89 f6                	mov    %esi,%esi
 379:	8d bc 27 00 00 00 00 	lea    0x0(%edi),%edi
    putc(fd, buf[i]);
 380:	0f be 54 1d e4       	movsbl 0xffffffe4(%ebp,%ebx,1),%edx
 385:	4b                   	dec    %ebx
 386:	8b 45 dc             	mov    0xffffffdc(%ebp),%eax
 389:	e8 62 ff ff ff       	call   2f0 <putc>
 38e:	83 fb ff             	cmp    $0xffffffff,%ebx
 391:	75 ed                	jne    380 <printint+0x60>
}
 393:	83 c4 1c             	add    $0x1c,%esp
 396:	5b                   	pop    %ebx
 397:	5e                   	pop    %esi
 398:	5f                   	pop    %edi
 399:	5d                   	pop    %ebp
 39a:	c3                   	ret    
 39b:	89 d0                	mov    %edx,%eax
 39d:	f7 d8                	neg    %eax
 39f:	c7 45 e0 01 00 00 00 	movl   $0x1,0xffffffe0(%ebp)
 3a6:	eb 9a                	jmp    342 <printint+0x22>
 3a8:	90                   	nop    
 3a9:	8d b4 26 00 00 00 00 	lea    0x0(%esi),%esi

000003b0 <printf>:

// Print to the given fd. Only understands %d, %x, %p, %s.
void
printf(int fd, char *fmt, ...)
{
 3b0:	55                   	push   %ebp
 3b1:	89 e5                	mov    %esp,%ebp
 3b3:	57                   	push   %edi
 3b4:	56                   	push   %esi
 3b5:	53                   	push   %ebx
 3b6:	83 ec 0c             	sub    $0xc,%esp
  char *s;
  int c, i, state;
  uint *ap;

  state = 0;
  ap = (uint*)(void*)&fmt + 1;
  for(i = 0; fmt[i]; i++){
 3b9:	8b 55 0c             	mov    0xc(%ebp),%edx
 3bc:	0f b6 02             	movzbl (%edx),%eax
 3bf:	84 c0                	test   %al,%al
 3c1:	0f 84 99 00 00 00    	je     460 <printf+0xb0>
 3c7:	8d 4d 10             	lea    0x10(%ebp),%ecx
 3ca:	31 ff                	xor    %edi,%edi
 3cc:	31 f6                	xor    %esi,%esi
 3ce:	89 4d f0             	mov    %ecx,0xfffffff0(%ebp)
 3d1:	eb 26                	jmp    3f9 <printf+0x49>
    c = fmt[i] & 0xff;
    if(state == 0){
      if(c == '%'){
 3d3:	83 fb 25             	cmp    $0x25,%ebx
 3d6:	0f 85 8c 00 00 00    	jne    468 <printf+0xb8>
 3dc:	be 25 00 00 00       	mov    $0x25,%esi
 3e1:	eb 0d                	jmp    3f0 <printf+0x40>
 3e3:	90                   	nop    
 3e4:	90                   	nop    
 3e5:	90                   	nop    
 3e6:	90                   	nop    
 3e7:	90                   	nop    
 3e8:	90                   	nop    
 3e9:	90                   	nop    
 3ea:	90                   	nop    
 3eb:	90                   	nop    
 3ec:	90                   	nop    
 3ed:	90                   	nop    
 3ee:	90                   	nop    
 3ef:	90                   	nop    
 3f0:	47                   	inc    %edi
 3f1:	0f b6 04 3a          	movzbl (%edx,%edi,1),%eax
 3f5:	84 c0                	test   %al,%al
 3f7:	74 67                	je     460 <printf+0xb0>
 3f9:	85 f6                	test   %esi,%esi
 3fb:	0f b6 d8             	movzbl %al,%ebx
 3fe:	74 d3                	je     3d3 <printf+0x23>
        state = '%';
      } else {
        putc(fd, c);
      }
    } else if(state == '%'){
 400:	83 fe 25             	cmp    $0x25,%esi
 403:	75 eb                	jne    3f0 <printf+0x40>
      if(c == 'd'){
 405:	83 fb 64             	cmp    $0x64,%ebx
 408:	0f 84 e0 00 00 00    	je     4ee <printf+0x13e>
        printint(fd, *ap, 10, 1);
        ap++;
      } else if(c == 'x' || c == 'p'){
 40e:	83 fb 78             	cmp    $0x78,%ebx
 411:	74 68                	je     47b <printf+0xcb>
 413:	83 fb 70             	cmp    $0x70,%ebx
 416:	74 63                	je     47b <printf+0xcb>
        printint(fd, *ap, 16, 0);
        ap++;
      } else if(c == 's'){
 418:	83 fb 73             	cmp    $0x73,%ebx
 41b:	90                   	nop    
 41c:	8d 74 26 00          	lea    0x0(%esi),%esi
 420:	0f 84 7c 00 00 00    	je     4a2 <printf+0xf2>
        s = (char*)*ap;
        ap++;
        if(s == 0)
          s = "(null)";
        while(*s != 0){
          putc(fd, *s);
          s++;
        }
      } else if(c == 'c'){
 426:	83 fb 63             	cmp    $0x63,%ebx
 429:	0f 84 e4 00 00 00    	je     513 <printf+0x163>
        putc(fd, *ap);
        ap++;
      } else if(c == '%'){
 42f:	83 fb 25             	cmp    $0x25,%ebx
 432:	0f 84 c4 00 00 00    	je     4fc <printf+0x14c>
        putc(fd, c);
      } else {
        // Unknown % sequence.  Print it to draw attention.
        putc(fd, '%');
 438:	8b 45 08             	mov    0x8(%ebp),%eax
 43b:	ba 25 00 00 00       	mov    $0x25,%edx
 440:	47                   	inc    %edi
        putc(fd, c);
 441:	31 f6                	xor    %esi,%esi
 443:	e8 a8 fe ff ff       	call   2f0 <putc>
 448:	8b 45 08             	mov    0x8(%ebp),%eax
 44b:	0f be d3             	movsbl %bl,%edx
 44e:	e8 9d fe ff ff       	call   2f0 <putc>
 453:	8b 55 0c             	mov    0xc(%ebp),%edx
 456:	0f b6 04 3a          	movzbl (%edx,%edi,1),%eax
 45a:	84 c0                	test   %al,%al
 45c:	75 9b                	jne    3f9 <printf+0x49>
 45e:	89 f6                	mov    %esi,%esi
      }
      state = 0;
    }
  }
}
 460:	83 c4 0c             	add    $0xc,%esp
 463:	5b                   	pop    %ebx
 464:	5e                   	pop    %esi
 465:	5f                   	pop    %edi
 466:	5d                   	pop    %ebp
 467:	c3                   	ret    
 468:	8b 45 08             	mov    0x8(%ebp),%eax
 46b:	0f be d3             	movsbl %bl,%edx
 46e:	e8 7d fe ff ff       	call   2f0 <putc>
 473:	8b 55 0c             	mov    0xc(%ebp),%edx
 476:	e9 75 ff ff ff       	jmp    3f0 <printf+0x40>
 47b:	c7 04 24 00 00 00 00 	movl   $0x0,(%esp)
 482:	b9 10 00 00 00       	mov    $0x10,%ecx
 487:	8b 45 f0             	mov    0xfffffff0(%ebp),%eax
 48a:	31 f6                	xor    %esi,%esi
 48c:	8b 10                	mov    (%eax),%edx
 48e:	8b 45 08             	mov    0x8(%ebp),%eax
 491:	e8 8a fe ff ff       	call   320 <printint>
 496:	8b 55 0c             	mov    0xc(%ebp),%edx
 499:	83 45 f0 04          	addl   $0x4,0xfffffff0(%ebp)
 49d:	e9 4e ff ff ff       	jmp    3f0 <printf+0x40>
 4a2:	8b 4d f0             	mov    0xfffffff0(%ebp),%ecx
 4a5:	8b 01                	mov    (%ecx),%eax
 4a7:	83 c1 04             	add    $0x4,%ecx
 4aa:	89 4d f0             	mov    %ecx,0xfffffff0(%ebp)
 4ad:	b9 9a 06 00 00       	mov    $0x69a,%ecx
 4b2:	85 c0                	test   %eax,%eax
 4b4:	74 02                	je     4b8 <printf+0x108>
 4b6:	89 c1                	mov    %eax,%ecx
 4b8:	0f b6 01             	movzbl (%ecx),%eax
 4bb:	84 c0                	test   %al,%al
 4bd:	74 28                	je     4e7 <printf+0x137>
 4bf:	89 cb                	mov    %ecx,%ebx
 4c1:	eb 0d                	jmp    4d0 <printf+0x120>
 4c3:	90                   	nop    
 4c4:	90                   	nop    
 4c5:	90                   	nop    
 4c6:	90                   	nop    
 4c7:	90                   	nop    
 4c8:	90                   	nop    
 4c9:	90                   	nop    
 4ca:	90                   	nop    
 4cb:	90                   	nop    
 4cc:	90                   	nop    
 4cd:	90                   	nop    
 4ce:	90                   	nop    
 4cf:	90                   	nop    
 4d0:	0f be d0             	movsbl %al,%edx
 4d3:	8b 45 08             	mov    0x8(%ebp),%eax
 4d6:	e8 15 fe ff ff       	call   2f0 <putc>
 4db:	0f b6 43 01          	movzbl 0x1(%ebx),%eax
 4df:	43                   	inc    %ebx
 4e0:	84 c0                	test   %al,%al
 4e2:	75 ec                	jne    4d0 <printf+0x120>
 4e4:	8b 55 0c             	mov    0xc(%ebp),%edx
 4e7:	31 f6                	xor    %esi,%esi
 4e9:	e9 02 ff ff ff       	jmp    3f0 <printf+0x40>
 4ee:	b9 0a 00 00 00       	mov    $0xa,%ecx
 4f3:	c7 04 24 01 00 00 00 	movl   $0x1,(%esp)
 4fa:	eb 8b                	jmp    487 <printf+0xd7>
 4fc:	8b 45 08             	mov    0x8(%ebp),%eax
 4ff:	ba 25 00 00 00       	mov    $0x25,%edx
 504:	31 f6                	xor    %esi,%esi
 506:	e8 e5 fd ff ff       	call   2f0 <putc>
 50b:	8b 55 0c             	mov    0xc(%ebp),%edx
 50e:	e9 dd fe ff ff       	jmp    3f0 <printf+0x40>
 513:	8b 45 f0             	mov    0xfffffff0(%ebp),%eax
 516:	31 f6                	xor    %esi,%esi
 518:	0f be 10             	movsbl (%eax),%edx
 51b:	8b 45 08             	mov    0x8(%ebp),%eax
 51e:	e8 cd fd ff ff       	call   2f0 <putc>
 523:	8b 55 0c             	mov    0xc(%ebp),%edx
 526:	83 45 f0 04          	addl   $0x4,0xfffffff0(%ebp)
 52a:	e9 c1 fe ff ff       	jmp    3f0 <printf+0x40>
 52f:	90                   	nop    

00000530 <free>:
static Header *freep;

void
free(void *ap)
{
 530:	55                   	push   %ebp
  Header *bp, *p;

  bp = (Header*) ap - 1;
  for(p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr)
 531:	8b 0d bc 06 00 00    	mov    0x6bc,%ecx
 537:	89 e5                	mov    %esp,%ebp
 539:	56                   	push   %esi
 53a:	53                   	push   %ebx
 53b:	8b 5d 08             	mov    0x8(%ebp),%ebx
 53e:	83 eb 08             	sub    $0x8,%ebx
 541:	eb 0d                	jmp    550 <free+0x20>
 543:	90                   	nop    
 544:	90                   	nop    
 545:	90                   	nop    
 546:	90                   	nop    
 547:	90                   	nop    
 548:	90                   	nop    
 549:	90                   	nop    
 54a:	90                   	nop    
 54b:	90                   	nop    
 54c:	90                   	nop    
 54d:	90                   	nop    
 54e:	90                   	nop    
 54f:	90                   	nop    
 550:	39 d9                	cmp    %ebx,%ecx
 552:	73 04                	jae    558 <free+0x28>
 554:	3b 19                	cmp    (%ecx),%ebx
 556:	72 12                	jb     56a <free+0x3a>
    if(p >= p->s.ptr && (bp > p || bp < p->s.ptr))
 558:	8b 11                	mov    (%ecx),%edx
 55a:	39 d1                	cmp    %edx,%ecx
 55c:	72 08                	jb     566 <free+0x36>
 55e:	39 d9                	cmp    %ebx,%ecx
 560:	72 0a                	jb     56c <free+0x3c>
 562:	39 d3                	cmp    %edx,%ebx
 564:	72 06                	jb     56c <free+0x3c>
 566:	89 d1                	mov    %edx,%ecx
 568:	eb e6                	jmp    550 <free+0x20>
 56a:	8b 11                	mov    (%ecx),%edx
      break;
  if(bp + bp->s.size == p->s.ptr){
 56c:	8b 73 04             	mov    0x4(%ebx),%esi
 56f:	8d 04 f3             	lea    (%ebx,%esi,8),%eax
 572:	39 d0                	cmp    %edx,%eax
 574:	74 2e                	je     5a4 <free+0x74>
    bp->s.size += p->s.ptr->s.size;
    bp->s.ptr = p->s.ptr->s.ptr;
  } else
    bp->s.ptr = p->s.ptr;
 576:	89 13                	mov    %edx,(%ebx)
  if(p + p->s.size == bp){
 578:	8b 51 04             	mov    0x4(%ecx),%edx
 57b:	8d 04 d1             	lea    (%ecx,%edx,8),%eax
 57e:	39 c3                	cmp    %eax,%ebx
 580:	74 0c                	je     58e <free+0x5e>
    p->s.size += bp->s.size;
    p->s.ptr = bp->s.ptr;
  } else
    p->s.ptr = bp;
 582:	89 19                	mov    %ebx,(%ecx)
  freep = p;
}
 584:	5b                   	pop    %ebx
 585:	89 0d bc 06 00 00    	mov    %ecx,0x6bc
 58b:	5e                   	pop    %esi
 58c:	5d                   	pop    %ebp
 58d:	c3                   	ret    
 58e:	8b 43 04             	mov    0x4(%ebx),%eax
 591:	01 c2                	add    %eax,%edx
 593:	8b 03                	mov    (%ebx),%eax
 595:	89 51 04             	mov    %edx,0x4(%ecx)
 598:	89 01                	mov    %eax,(%ecx)
 59a:	5b                   	pop    %ebx
 59b:	89 0d bc 06 00 00    	mov    %ecx,0x6bc
 5a1:	5e                   	pop    %esi
 5a2:	5d                   	pop    %ebp
 5a3:	c3                   	ret    
 5a4:	8b 42 04             	mov    0x4(%edx),%eax
 5a7:	01 c6                	add    %eax,%esi
 5a9:	8b 02                	mov    (%edx),%eax
 5ab:	89 73 04             	mov    %esi,0x4(%ebx)
 5ae:	89 03                	mov    %eax,(%ebx)
 5b0:	eb c6                	jmp    578 <free+0x48>
 5b2:	8d b4 26 00 00 00 00 	lea    0x0(%esi),%esi
 5b9:	8d bc 27 00 00 00 00 	lea    0x0(%edi),%edi

000005c0 <malloc>:

static Header*
morecore(uint nu)
{
  char *p;
  Header *hp;

  if(nu < PAGE)
    nu = PAGE;
  p = sbrk(nu * sizeof(Header));
  if(p == (char*) -1)
    return 0;
  hp = (Header*)p;
  hp->s.size = nu;
  free((void*)(hp + 1));
  return freep;
}

void*
malloc(uint nbytes)
{
 5c0:	55                   	push   %ebp
 5c1:	89 e5                	mov    %esp,%ebp
 5c3:	57                   	push   %edi
 5c4:	56                   	push   %esi
 5c5:	53                   	push   %ebx
 5c6:	83 ec 0c             	sub    $0xc,%esp
  Header *p, *prevp;
  uint nunits;

  nunits = (nbytes + sizeof(Header) - 1)/sizeof(Header) + 1;
 5c9:	8b 45 08             	mov    0x8(%ebp),%eax
  if((prevp = freep) == 0){
 5cc:	8b 15 bc 06 00 00    	mov    0x6bc,%edx
 5d2:	83 c0 07             	add    $0x7,%eax
 5d5:	c1 e8 03             	shr    $0x3,%eax
 5d8:	85 d2                	test   %edx,%edx
 5da:	8d 58 01             	lea    0x1(%eax),%ebx
 5dd:	0f 84 92 00 00 00    	je     675 <malloc+0xb5>
    base.s.ptr = freep = prevp = &base;
    base.s.size = 0;
  }
  for(p = prevp->s.ptr; ; prevp = p, p = p->s.ptr){
 5e3:	8b 0a                	mov    (%edx),%ecx
    if(p->s.size >= nunits){
 5e5:	8b 41 04             	mov    0x4(%ecx),%eax
 5e8:	39 c3                	cmp    %eax,%ebx
 5ea:	76 63                	jbe    64f <malloc+0x8f>
      if(p->s.size == nunits)
        prevp->s.ptr = p->s.ptr;
      else {
        p->s.size -= nunits;
        p += p->s.size;
        p->s.size = nunits;
      }
      freep = prevp;
      return (void*) (p + 1);
 5ec:	8d 3c dd 00 00 00 00 	lea    0x0(,%ebx,8),%edi
 5f3:	eb 09                	jmp    5fe <malloc+0x3e>
 5f5:	8b 0a                	mov    (%edx),%ecx
 5f7:	8b 41 04             	mov    0x4(%ecx),%eax
 5fa:	39 c3                	cmp    %eax,%ebx
 5fc:	76 51                	jbe    64f <malloc+0x8f>
    }
    if(p == freep)
 5fe:	39 0d bc 06 00 00    	cmp    %ecx,0x6bc
 604:	89 ca                	mov    %ecx,%edx
 606:	75 ed                	jne    5f5 <malloc+0x35>
 608:	81 fb ff 0f 00 00    	cmp    $0xfff,%ebx
 60e:	77 39                	ja     649 <malloc+0x89>
 610:	be 00 10 00 00       	mov    $0x1000,%esi
 615:	b8 00 80 00 00       	mov    $0x8000,%eax
 61a:	89 04 24             	mov    %eax,(%esp)
 61d:	e8 b2 fc ff ff       	call   2d4 <sbrk>
 622:	83 f8 ff             	cmp    $0xffffffff,%eax
 625:	74 18                	je     63f <malloc+0x7f>
 627:	89 70 04             	mov    %esi,0x4(%eax)
 62a:	83 c0 08             	add    $0x8,%eax
 62d:	89 04 24             	mov    %eax,(%esp)
 630:	e8 fb fe ff ff       	call   530 <free>
 635:	8b 15 bc 06 00 00    	mov    0x6bc,%edx
      if((p = morecore(nunits)) == 0)
 63b:	85 d2                	test   %edx,%edx
 63d:	75 b6                	jne    5f5 <malloc+0x35>
        return 0;
  }
}
 63f:	83 c4 0c             	add    $0xc,%esp
 642:	31 c0                	xor    %eax,%eax
 644:	5b                   	pop    %ebx
 645:	5e                   	pop    %esi
 646:	5f                   	pop    %edi
 647:	5d                   	pop    %ebp
 648:	c3                   	ret    
 649:	89 de                	mov    %ebx,%esi
 64b:	89 f8                	mov    %edi,%eax
 64d:	eb cb                	jmp    61a <malloc+0x5a>
 64f:	39 c3                	cmp    %eax,%ebx
 651:	74 1c                	je     66f <malloc+0xaf>
 653:	29 d8                	sub    %ebx,%eax
 655:	89 41 04             	mov    %eax,0x4(%ecx)
 658:	8d 0c c1             	lea    (%ecx,%eax,8),%ecx
 65b:	89 59 04             	mov    %ebx,0x4(%ecx)
 65e:	89 15 bc 06 00 00    	mov    %edx,0x6bc
 664:	83 c4 0c             	add    $0xc,%esp
 667:	5b                   	pop    %ebx
 668:	8d 41 08             	lea    0x8(%ecx),%eax
 66b:	5e                   	pop    %esi
 66c:	5f                   	pop    %edi
 66d:	5d                   	pop    %ebp
 66e:	c3                   	ret    
 66f:	8b 01                	mov    (%ecx),%eax
 671:	89 02                	mov    %eax,(%edx)
 673:	eb e9                	jmp    65e <malloc+0x9e>
 675:	b8 b4 06 00 00       	mov    $0x6b4,%eax
 67a:	ba b4 06 00 00       	mov    $0x6b4,%edx
 67f:	a3 bc 06 00 00       	mov    %eax,0x6bc
 684:	b8 b4 06 00 00       	mov    $0x6b4,%eax
 689:	a3 b4 06 00 00       	mov    %eax,0x6b4
 68e:	31 c0                	xor    %eax,%eax
 690:	a3 b8 06 00 00       	mov    %eax,0x6b8
 695:	e9 49 ff ff ff       	jmp    5e3 <malloc+0x23>