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wc.asm
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_wc: file format elf32-i386
Disassembly of section .text:
00000000 <wc>:
char buf[512];
void
wc(int fd, char *name)
{
0: 55 push %ebp
1: 89 e5 mov %esp,%ebp
3: 83 ec 28 sub $0x28,%esp
int i, n;
int l, w, c, inword;
l = w = c = 0;
6: c7 45 e8 00 00 00 00 movl $0x0,-0x18(%ebp)
d: 8b 45 e8 mov -0x18(%ebp),%eax
10: 89 45 ec mov %eax,-0x14(%ebp)
13: 8b 45 ec mov -0x14(%ebp),%eax
16: 89 45 f0 mov %eax,-0x10(%ebp)
inword = 0;
19: c7 45 e4 00 00 00 00 movl $0x0,-0x1c(%ebp)
while((n = read(fd, buf, sizeof(buf))) > 0){
20: eb 69 jmp 8b <wc+0x8b>
for(i=0; i<n; i++){
22: c7 45 f4 00 00 00 00 movl $0x0,-0xc(%ebp)
29: eb 58 jmp 83 <wc+0x83>
c++;
2b: 83 45 e8 01 addl $0x1,-0x18(%ebp)
if(buf[i] == '\n')
2f: 8b 45 f4 mov -0xc(%ebp),%eax
32: 05 20 0c 00 00 add $0xc20,%eax
37: 0f b6 00 movzbl (%eax),%eax
3a: 3c 0a cmp $0xa,%al
3c: 75 04 jne 42 <wc+0x42>
l++;
3e: 83 45 f0 01 addl $0x1,-0x10(%ebp)
if(strchr(" \r\t\n\v", buf[i]))
42: 8b 45 f4 mov -0xc(%ebp),%eax
45: 05 20 0c 00 00 add $0xc20,%eax
4a: 0f b6 00 movzbl (%eax),%eax
4d: 0f be c0 movsbl %al,%eax
50: 83 ec 08 sub $0x8,%esp
53: 50 push %eax
54: 68 41 09 00 00 push $0x941
59: e8 35 02 00 00 call 293 <strchr>
5e: 83 c4 10 add $0x10,%esp
61: 85 c0 test %eax,%eax
63: 74 09 je 6e <wc+0x6e>
inword = 0;
65: c7 45 e4 00 00 00 00 movl $0x0,-0x1c(%ebp)
6c: eb 11 jmp 7f <wc+0x7f>
else if(!inword){
6e: 83 7d e4 00 cmpl $0x0,-0x1c(%ebp)
72: 75 0b jne 7f <wc+0x7f>
w++;
74: 83 45 ec 01 addl $0x1,-0x14(%ebp)
inword = 1;
78: c7 45 e4 01 00 00 00 movl $0x1,-0x1c(%ebp)
int l, w, c, inword;
l = w = c = 0;
inword = 0;
while((n = read(fd, buf, sizeof(buf))) > 0){
for(i=0; i<n; i++){
7f: 83 45 f4 01 addl $0x1,-0xc(%ebp)
83: 8b 45 f4 mov -0xc(%ebp),%eax
86: 3b 45 e0 cmp -0x20(%ebp),%eax
89: 7c a0 jl 2b <wc+0x2b>
int i, n;
int l, w, c, inword;
l = w = c = 0;
inword = 0;
while((n = read(fd, buf, sizeof(buf))) > 0){
8b: 83 ec 04 sub $0x4,%esp
8e: 68 00 02 00 00 push $0x200
93: 68 20 0c 00 00 push $0xc20
98: ff 75 08 pushl 0x8(%ebp)
9b: e8 8c 03 00 00 call 42c <read>
a0: 83 c4 10 add $0x10,%esp
a3: 89 45 e0 mov %eax,-0x20(%ebp)
a6: 83 7d e0 00 cmpl $0x0,-0x20(%ebp)
aa: 0f 8f 72 ff ff ff jg 22 <wc+0x22>
w++;
inword = 1;
}
}
}
if(n < 0){
b0: 83 7d e0 00 cmpl $0x0,-0x20(%ebp)
b4: 79 17 jns cd <wc+0xcd>
printf(1, "wc: read error\n");
b6: 83 ec 08 sub $0x8,%esp
b9: 68 47 09 00 00 push $0x947
be: 6a 01 push $0x1
c0: e8 c6 04 00 00 call 58b <printf>
c5: 83 c4 10 add $0x10,%esp
exit();
c8: e8 47 03 00 00 call 414 <exit>
}
printf(1, "%d %d %d %s\n", l, w, c, name);
cd: 83 ec 08 sub $0x8,%esp
d0: ff 75 0c pushl 0xc(%ebp)
d3: ff 75 e8 pushl -0x18(%ebp)
d6: ff 75 ec pushl -0x14(%ebp)
d9: ff 75 f0 pushl -0x10(%ebp)
dc: 68 57 09 00 00 push $0x957
e1: 6a 01 push $0x1
e3: e8 a3 04 00 00 call 58b <printf>
e8: 83 c4 20 add $0x20,%esp
}
eb: 90 nop
ec: c9 leave
ed: c3 ret
000000ee <main>:
int
main(int argc, char *argv[])
{
ee: 8d 4c 24 04 lea 0x4(%esp),%ecx
f2: 83 e4 f0 and $0xfffffff0,%esp
f5: ff 71 fc pushl -0x4(%ecx)
f8: 55 push %ebp
f9: 89 e5 mov %esp,%ebp
fb: 53 push %ebx
fc: 51 push %ecx
fd: 83 ec 10 sub $0x10,%esp
100: 89 cb mov %ecx,%ebx
int fd, i;
if(argc <= 1){
102: 83 3b 01 cmpl $0x1,(%ebx)
105: 7f 17 jg 11e <main+0x30>
wc(0, "");
107: 83 ec 08 sub $0x8,%esp
10a: 68 64 09 00 00 push $0x964
10f: 6a 00 push $0x0
111: e8 ea fe ff ff call 0 <wc>
116: 83 c4 10 add $0x10,%esp
exit();
119: e8 f6 02 00 00 call 414 <exit>
}
for(i = 1; i < argc; i++){
11e: c7 45 f4 01 00 00 00 movl $0x1,-0xc(%ebp)
125: e9 83 00 00 00 jmp 1ad <main+0xbf>
if((fd = open(argv[i], 0)) < 0){
12a: 8b 45 f4 mov -0xc(%ebp),%eax
12d: 8d 14 85 00 00 00 00 lea 0x0(,%eax,4),%edx
134: 8b 43 04 mov 0x4(%ebx),%eax
137: 01 d0 add %edx,%eax
139: 8b 00 mov (%eax),%eax
13b: 83 ec 08 sub $0x8,%esp
13e: 6a 00 push $0x0
140: 50 push %eax
141: e8 0e 03 00 00 call 454 <open>
146: 83 c4 10 add $0x10,%esp
149: 89 45 f0 mov %eax,-0x10(%ebp)
14c: 83 7d f0 00 cmpl $0x0,-0x10(%ebp)
150: 79 29 jns 17b <main+0x8d>
printf(1, "wc: cannot open %s\n", argv[i]);
152: 8b 45 f4 mov -0xc(%ebp),%eax
155: 8d 14 85 00 00 00 00 lea 0x0(,%eax,4),%edx
15c: 8b 43 04 mov 0x4(%ebx),%eax
15f: 01 d0 add %edx,%eax
161: 8b 00 mov (%eax),%eax
163: 83 ec 04 sub $0x4,%esp
166: 50 push %eax
167: 68 65 09 00 00 push $0x965
16c: 6a 01 push $0x1
16e: e8 18 04 00 00 call 58b <printf>
173: 83 c4 10 add $0x10,%esp
exit();
176: e8 99 02 00 00 call 414 <exit>
}
wc(fd, argv[i]);
17b: 8b 45 f4 mov -0xc(%ebp),%eax
17e: 8d 14 85 00 00 00 00 lea 0x0(,%eax,4),%edx
185: 8b 43 04 mov 0x4(%ebx),%eax
188: 01 d0 add %edx,%eax
18a: 8b 00 mov (%eax),%eax
18c: 83 ec 08 sub $0x8,%esp
18f: 50 push %eax
190: ff 75 f0 pushl -0x10(%ebp)
193: e8 68 fe ff ff call 0 <wc>
198: 83 c4 10 add $0x10,%esp
close(fd);
19b: 83 ec 0c sub $0xc,%esp
19e: ff 75 f0 pushl -0x10(%ebp)
1a1: e8 96 02 00 00 call 43c <close>
1a6: 83 c4 10 add $0x10,%esp
if(argc <= 1){
wc(0, "");
exit();
}
for(i = 1; i < argc; i++){
1a9: 83 45 f4 01 addl $0x1,-0xc(%ebp)
1ad: 8b 45 f4 mov -0xc(%ebp),%eax
1b0: 3b 03 cmp (%ebx),%eax
1b2: 0f 8c 72 ff ff ff jl 12a <main+0x3c>
exit();
}
wc(fd, argv[i]);
close(fd);
}
exit();
1b8: e8 57 02 00 00 call 414 <exit>
000001bd <stosb>:
"cc");
}
static inline void
stosb(void *addr, int data, int cnt)
{
1bd: 55 push %ebp
1be: 89 e5 mov %esp,%ebp
1c0: 57 push %edi
1c1: 53 push %ebx
asm volatile("cld; rep stosb" :
1c2: 8b 4d 08 mov 0x8(%ebp),%ecx
1c5: 8b 55 10 mov 0x10(%ebp),%edx
1c8: 8b 45 0c mov 0xc(%ebp),%eax
1cb: 89 cb mov %ecx,%ebx
1cd: 89 df mov %ebx,%edi
1cf: 89 d1 mov %edx,%ecx
1d1: fc cld
1d2: f3 aa rep stos %al,%es:(%edi)
1d4: 89 ca mov %ecx,%edx
1d6: 89 fb mov %edi,%ebx
1d8: 89 5d 08 mov %ebx,0x8(%ebp)
1db: 89 55 10 mov %edx,0x10(%ebp)
"=D" (addr), "=c" (cnt) :
"0" (addr), "1" (cnt), "a" (data) :
"memory", "cc");
}
1de: 90 nop
1df: 5b pop %ebx
1e0: 5f pop %edi
1e1: 5d pop %ebp
1e2: c3 ret
000001e3 <strcpy>:
#include "user.h"
#include "x86.h"
char*
strcpy(char *s, char *t)
{
1e3: 55 push %ebp
1e4: 89 e5 mov %esp,%ebp
1e6: 83 ec 10 sub $0x10,%esp
char *os;
os = s;
1e9: 8b 45 08 mov 0x8(%ebp),%eax
1ec: 89 45 fc mov %eax,-0x4(%ebp)
while((*s++ = *t++) != 0)
1ef: 90 nop
1f0: 8b 45 08 mov 0x8(%ebp),%eax
1f3: 8d 50 01 lea 0x1(%eax),%edx
1f6: 89 55 08 mov %edx,0x8(%ebp)
1f9: 8b 55 0c mov 0xc(%ebp),%edx
1fc: 8d 4a 01 lea 0x1(%edx),%ecx
1ff: 89 4d 0c mov %ecx,0xc(%ebp)
202: 0f b6 12 movzbl (%edx),%edx
205: 88 10 mov %dl,(%eax)
207: 0f b6 00 movzbl (%eax),%eax
20a: 84 c0 test %al,%al
20c: 75 e2 jne 1f0 <strcpy+0xd>
;
return os;
20e: 8b 45 fc mov -0x4(%ebp),%eax
}
211: c9 leave
212: c3 ret
00000213 <strcmp>:
int
strcmp(const char *p, const char *q)
{
213: 55 push %ebp
214: 89 e5 mov %esp,%ebp
while(*p && *p == *q)
216: eb 08 jmp 220 <strcmp+0xd>
p++, q++;
218: 83 45 08 01 addl $0x1,0x8(%ebp)
21c: 83 45 0c 01 addl $0x1,0xc(%ebp)
}
int
strcmp(const char *p, const char *q)
{
while(*p && *p == *q)
220: 8b 45 08 mov 0x8(%ebp),%eax
223: 0f b6 00 movzbl (%eax),%eax
226: 84 c0 test %al,%al
228: 74 10 je 23a <strcmp+0x27>
22a: 8b 45 08 mov 0x8(%ebp),%eax
22d: 0f b6 10 movzbl (%eax),%edx
230: 8b 45 0c mov 0xc(%ebp),%eax
233: 0f b6 00 movzbl (%eax),%eax
236: 38 c2 cmp %al,%dl
238: 74 de je 218 <strcmp+0x5>
p++, q++;
return (uchar)*p - (uchar)*q;
23a: 8b 45 08 mov 0x8(%ebp),%eax
23d: 0f b6 00 movzbl (%eax),%eax
240: 0f b6 d0 movzbl %al,%edx
243: 8b 45 0c mov 0xc(%ebp),%eax
246: 0f b6 00 movzbl (%eax),%eax
249: 0f b6 c0 movzbl %al,%eax
24c: 29 c2 sub %eax,%edx
24e: 89 d0 mov %edx,%eax
}
250: 5d pop %ebp
251: c3 ret
00000252 <strlen>:
uint
strlen(char *s)
{
252: 55 push %ebp
253: 89 e5 mov %esp,%ebp
255: 83 ec 10 sub $0x10,%esp
int n;
for(n = 0; s[n]; n++)
258: c7 45 fc 00 00 00 00 movl $0x0,-0x4(%ebp)
25f: eb 04 jmp 265 <strlen+0x13>
261: 83 45 fc 01 addl $0x1,-0x4(%ebp)
265: 8b 55 fc mov -0x4(%ebp),%edx
268: 8b 45 08 mov 0x8(%ebp),%eax
26b: 01 d0 add %edx,%eax
26d: 0f b6 00 movzbl (%eax),%eax
270: 84 c0 test %al,%al
272: 75 ed jne 261 <strlen+0xf>
;
return n;
274: 8b 45 fc mov -0x4(%ebp),%eax
}
277: c9 leave
278: c3 ret
00000279 <memset>:
void*
memset(void *dst, int c, uint n)
{
279: 55 push %ebp
27a: 89 e5 mov %esp,%ebp
stosb(dst, c, n);
27c: 8b 45 10 mov 0x10(%ebp),%eax
27f: 50 push %eax
280: ff 75 0c pushl 0xc(%ebp)
283: ff 75 08 pushl 0x8(%ebp)
286: e8 32 ff ff ff call 1bd <stosb>
28b: 83 c4 0c add $0xc,%esp
return dst;
28e: 8b 45 08 mov 0x8(%ebp),%eax
}
291: c9 leave
292: c3 ret
00000293 <strchr>:
char*
strchr(const char *s, char c)
{
293: 55 push %ebp
294: 89 e5 mov %esp,%ebp
296: 83 ec 04 sub $0x4,%esp
299: 8b 45 0c mov 0xc(%ebp),%eax
29c: 88 45 fc mov %al,-0x4(%ebp)
for(; *s; s++)
29f: eb 14 jmp 2b5 <strchr+0x22>
if(*s == c)
2a1: 8b 45 08 mov 0x8(%ebp),%eax
2a4: 0f b6 00 movzbl (%eax),%eax
2a7: 3a 45 fc cmp -0x4(%ebp),%al
2aa: 75 05 jne 2b1 <strchr+0x1e>
return (char*)s;
2ac: 8b 45 08 mov 0x8(%ebp),%eax
2af: eb 13 jmp 2c4 <strchr+0x31>
}
char*
strchr(const char *s, char c)
{
for(; *s; s++)
2b1: 83 45 08 01 addl $0x1,0x8(%ebp)
2b5: 8b 45 08 mov 0x8(%ebp),%eax
2b8: 0f b6 00 movzbl (%eax),%eax
2bb: 84 c0 test %al,%al
2bd: 75 e2 jne 2a1 <strchr+0xe>
if(*s == c)
return (char*)s;
return 0;
2bf: b8 00 00 00 00 mov $0x0,%eax
}
2c4: c9 leave
2c5: c3 ret
000002c6 <gets>:
char*
gets(char *buf, int max)
{
2c6: 55 push %ebp
2c7: 89 e5 mov %esp,%ebp
2c9: 83 ec 18 sub $0x18,%esp
int i, cc;
char c;
for(i=0; i+1 < max; ){
2cc: c7 45 f4 00 00 00 00 movl $0x0,-0xc(%ebp)
2d3: eb 42 jmp 317 <gets+0x51>
cc = read(0, &c, 1);
2d5: 83 ec 04 sub $0x4,%esp
2d8: 6a 01 push $0x1
2da: 8d 45 ef lea -0x11(%ebp),%eax
2dd: 50 push %eax
2de: 6a 00 push $0x0
2e0: e8 47 01 00 00 call 42c <read>
2e5: 83 c4 10 add $0x10,%esp
2e8: 89 45 f0 mov %eax,-0x10(%ebp)
if(cc < 1)
2eb: 83 7d f0 00 cmpl $0x0,-0x10(%ebp)
2ef: 7e 33 jle 324 <gets+0x5e>
break;
buf[i++] = c;
2f1: 8b 45 f4 mov -0xc(%ebp),%eax
2f4: 8d 50 01 lea 0x1(%eax),%edx
2f7: 89 55 f4 mov %edx,-0xc(%ebp)
2fa: 89 c2 mov %eax,%edx
2fc: 8b 45 08 mov 0x8(%ebp),%eax
2ff: 01 c2 add %eax,%edx
301: 0f b6 45 ef movzbl -0x11(%ebp),%eax
305: 88 02 mov %al,(%edx)
if(c == '\n' || c == '\r')
307: 0f b6 45 ef movzbl -0x11(%ebp),%eax
30b: 3c 0a cmp $0xa,%al
30d: 74 16 je 325 <gets+0x5f>
30f: 0f b6 45 ef movzbl -0x11(%ebp),%eax
313: 3c 0d cmp $0xd,%al
315: 74 0e je 325 <gets+0x5f>
gets(char *buf, int max)
{
int i, cc;
char c;
for(i=0; i+1 < max; ){
317: 8b 45 f4 mov -0xc(%ebp),%eax
31a: 83 c0 01 add $0x1,%eax
31d: 3b 45 0c cmp 0xc(%ebp),%eax
320: 7c b3 jl 2d5 <gets+0xf>
322: eb 01 jmp 325 <gets+0x5f>
cc = read(0, &c, 1);
if(cc < 1)
break;
324: 90 nop
buf[i++] = c;
if(c == '\n' || c == '\r')
break;
}
buf[i] = '\0';
325: 8b 55 f4 mov -0xc(%ebp),%edx
328: 8b 45 08 mov 0x8(%ebp),%eax
32b: 01 d0 add %edx,%eax
32d: c6 00 00 movb $0x0,(%eax)
return buf;
330: 8b 45 08 mov 0x8(%ebp),%eax
}
333: c9 leave
334: c3 ret
00000335 <stat>:
int
stat(char *n, struct stat *st)
{
335: 55 push %ebp
336: 89 e5 mov %esp,%ebp
338: 83 ec 18 sub $0x18,%esp
int fd;
int r;
fd = open(n, O_RDONLY);
33b: 83 ec 08 sub $0x8,%esp
33e: 6a 00 push $0x0
340: ff 75 08 pushl 0x8(%ebp)
343: e8 0c 01 00 00 call 454 <open>
348: 83 c4 10 add $0x10,%esp
34b: 89 45 f4 mov %eax,-0xc(%ebp)
if(fd < 0)
34e: 83 7d f4 00 cmpl $0x0,-0xc(%ebp)
352: 79 07 jns 35b <stat+0x26>
return -1;
354: b8 ff ff ff ff mov $0xffffffff,%eax
359: eb 25 jmp 380 <stat+0x4b>
r = fstat(fd, st);
35b: 83 ec 08 sub $0x8,%esp
35e: ff 75 0c pushl 0xc(%ebp)
361: ff 75 f4 pushl -0xc(%ebp)
364: e8 03 01 00 00 call 46c <fstat>
369: 83 c4 10 add $0x10,%esp
36c: 89 45 f0 mov %eax,-0x10(%ebp)
close(fd);
36f: 83 ec 0c sub $0xc,%esp
372: ff 75 f4 pushl -0xc(%ebp)
375: e8 c2 00 00 00 call 43c <close>
37a: 83 c4 10 add $0x10,%esp
return r;
37d: 8b 45 f0 mov -0x10(%ebp),%eax
}
380: c9 leave
381: c3 ret
00000382 <atoi>:
int
atoi(const char *s)
{
382: 55 push %ebp
383: 89 e5 mov %esp,%ebp
385: 83 ec 10 sub $0x10,%esp
int n;
n = 0;
388: c7 45 fc 00 00 00 00 movl $0x0,-0x4(%ebp)
while('0' <= *s && *s <= '9')
38f: eb 25 jmp 3b6 <atoi+0x34>
n = n*10 + *s++ - '0';
391: 8b 55 fc mov -0x4(%ebp),%edx
394: 89 d0 mov %edx,%eax
396: c1 e0 02 shl $0x2,%eax
399: 01 d0 add %edx,%eax
39b: 01 c0 add %eax,%eax
39d: 89 c1 mov %eax,%ecx
39f: 8b 45 08 mov 0x8(%ebp),%eax
3a2: 8d 50 01 lea 0x1(%eax),%edx
3a5: 89 55 08 mov %edx,0x8(%ebp)
3a8: 0f b6 00 movzbl (%eax),%eax
3ab: 0f be c0 movsbl %al,%eax
3ae: 01 c8 add %ecx,%eax
3b0: 83 e8 30 sub $0x30,%eax
3b3: 89 45 fc mov %eax,-0x4(%ebp)
atoi(const char *s)
{
int n;
n = 0;
while('0' <= *s && *s <= '9')
3b6: 8b 45 08 mov 0x8(%ebp),%eax
3b9: 0f b6 00 movzbl (%eax),%eax
3bc: 3c 2f cmp $0x2f,%al
3be: 7e 0a jle 3ca <atoi+0x48>
3c0: 8b 45 08 mov 0x8(%ebp),%eax
3c3: 0f b6 00 movzbl (%eax),%eax
3c6: 3c 39 cmp $0x39,%al
3c8: 7e c7 jle 391 <atoi+0xf>
n = n*10 + *s++ - '0';
return n;
3ca: 8b 45 fc mov -0x4(%ebp),%eax
}
3cd: c9 leave
3ce: c3 ret
000003cf <memmove>:
void*
memmove(void *vdst, void *vsrc, int n)
{
3cf: 55 push %ebp
3d0: 89 e5 mov %esp,%ebp
3d2: 83 ec 10 sub $0x10,%esp
char *dst, *src;
dst = vdst;
3d5: 8b 45 08 mov 0x8(%ebp),%eax
3d8: 89 45 fc mov %eax,-0x4(%ebp)
src = vsrc;
3db: 8b 45 0c mov 0xc(%ebp),%eax
3de: 89 45 f8 mov %eax,-0x8(%ebp)
while(n-- > 0)
3e1: eb 17 jmp 3fa <memmove+0x2b>
*dst++ = *src++;
3e3: 8b 45 fc mov -0x4(%ebp),%eax
3e6: 8d 50 01 lea 0x1(%eax),%edx
3e9: 89 55 fc mov %edx,-0x4(%ebp)
3ec: 8b 55 f8 mov -0x8(%ebp),%edx
3ef: 8d 4a 01 lea 0x1(%edx),%ecx
3f2: 89 4d f8 mov %ecx,-0x8(%ebp)
3f5: 0f b6 12 movzbl (%edx),%edx
3f8: 88 10 mov %dl,(%eax)
{
char *dst, *src;
dst = vdst;
src = vsrc;
while(n-- > 0)
3fa: 8b 45 10 mov 0x10(%ebp),%eax
3fd: 8d 50 ff lea -0x1(%eax),%edx
400: 89 55 10 mov %edx,0x10(%ebp)
403: 85 c0 test %eax,%eax
405: 7f dc jg 3e3 <memmove+0x14>
*dst++ = *src++;
return vdst;
407: 8b 45 08 mov 0x8(%ebp),%eax
}
40a: c9 leave
40b: c3 ret
0000040c <fork>:
name: \
movl $SYS_ ## name, %eax; \
int $T_SYSCALL; \
ret
SYSCALL(fork)
40c: b8 01 00 00 00 mov $0x1,%eax
411: cd 40 int $0x40
413: c3 ret
00000414 <exit>:
SYSCALL(exit)
414: b8 02 00 00 00 mov $0x2,%eax
419: cd 40 int $0x40
41b: c3 ret
0000041c <wait>:
SYSCALL(wait)
41c: b8 03 00 00 00 mov $0x3,%eax
421: cd 40 int $0x40
423: c3 ret
00000424 <pipe>:
SYSCALL(pipe)
424: b8 04 00 00 00 mov $0x4,%eax
429: cd 40 int $0x40
42b: c3 ret
0000042c <read>:
SYSCALL(read)
42c: b8 05 00 00 00 mov $0x5,%eax
431: cd 40 int $0x40
433: c3 ret
00000434 <write>:
SYSCALL(write)
434: b8 10 00 00 00 mov $0x10,%eax
439: cd 40 int $0x40
43b: c3 ret
0000043c <close>:
SYSCALL(close)
43c: b8 15 00 00 00 mov $0x15,%eax
441: cd 40 int $0x40
443: c3 ret
00000444 <kill>:
SYSCALL(kill)
444: b8 06 00 00 00 mov $0x6,%eax
449: cd 40 int $0x40
44b: c3 ret
0000044c <exec>:
SYSCALL(exec)
44c: b8 07 00 00 00 mov $0x7,%eax
451: cd 40 int $0x40
453: c3 ret
00000454 <open>:
SYSCALL(open)
454: b8 0f 00 00 00 mov $0xf,%eax
459: cd 40 int $0x40
45b: c3 ret
0000045c <mknod>:
SYSCALL(mknod)
45c: b8 11 00 00 00 mov $0x11,%eax
461: cd 40 int $0x40
463: c3 ret
00000464 <unlink>:
SYSCALL(unlink)
464: b8 12 00 00 00 mov $0x12,%eax
469: cd 40 int $0x40
46b: c3 ret
0000046c <fstat>:
SYSCALL(fstat)
46c: b8 08 00 00 00 mov $0x8,%eax
471: cd 40 int $0x40
473: c3 ret
00000474 <link>:
SYSCALL(link)
474: b8 13 00 00 00 mov $0x13,%eax
479: cd 40 int $0x40
47b: c3 ret
0000047c <mkdir>:
SYSCALL(mkdir)
47c: b8 14 00 00 00 mov $0x14,%eax
481: cd 40 int $0x40
483: c3 ret
00000484 <chdir>:
SYSCALL(chdir)
484: b8 09 00 00 00 mov $0x9,%eax
489: cd 40 int $0x40
48b: c3 ret
0000048c <dup>:
SYSCALL(dup)
48c: b8 0a 00 00 00 mov $0xa,%eax
491: cd 40 int $0x40
493: c3 ret
00000494 <getpid>:
SYSCALL(getpid)
494: b8 0b 00 00 00 mov $0xb,%eax
499: cd 40 int $0x40
49b: c3 ret
0000049c <sbrk>:
SYSCALL(sbrk)
49c: b8 0c 00 00 00 mov $0xc,%eax
4a1: cd 40 int $0x40
4a3: c3 ret
000004a4 <sleep>:
SYSCALL(sleep)
4a4: b8 0d 00 00 00 mov $0xd,%eax
4a9: cd 40 int $0x40
4ab: c3 ret
000004ac <uptime>:
SYSCALL(uptime)
4ac: b8 0e 00 00 00 mov $0xe,%eax
4b1: cd 40 int $0x40
4b3: c3 ret
000004b4 <putc>:
#include "stat.h"
#include "user.h"
static void
putc(int fd, char c)
{
4b4: 55 push %ebp
4b5: 89 e5 mov %esp,%ebp
4b7: 83 ec 18 sub $0x18,%esp
4ba: 8b 45 0c mov 0xc(%ebp),%eax
4bd: 88 45 f4 mov %al,-0xc(%ebp)
write(fd, &c, 1);
4c0: 83 ec 04 sub $0x4,%esp
4c3: 6a 01 push $0x1
4c5: 8d 45 f4 lea -0xc(%ebp),%eax
4c8: 50 push %eax
4c9: ff 75 08 pushl 0x8(%ebp)
4cc: e8 63 ff ff ff call 434 <write>
4d1: 83 c4 10 add $0x10,%esp
}
4d4: 90 nop
4d5: c9 leave
4d6: c3 ret
000004d7 <printint>:
static void
printint(int fd, int xx, int base, int sgn)
{
4d7: 55 push %ebp
4d8: 89 e5 mov %esp,%ebp
4da: 53 push %ebx
4db: 83 ec 24 sub $0x24,%esp
static char digits[] = "0123456789ABCDEF";
char buf[16];
int i, neg;
uint x;
neg = 0;
4de: c7 45 f0 00 00 00 00 movl $0x0,-0x10(%ebp)
if(sgn && xx < 0){
4e5: 83 7d 14 00 cmpl $0x0,0x14(%ebp)
4e9: 74 17 je 502 <printint+0x2b>
4eb: 83 7d 0c 00 cmpl $0x0,0xc(%ebp)
4ef: 79 11 jns 502 <printint+0x2b>
neg = 1;
4f1: c7 45 f0 01 00 00 00 movl $0x1,-0x10(%ebp)
x = -xx;
4f8: 8b 45 0c mov 0xc(%ebp),%eax
4fb: f7 d8 neg %eax
4fd: 89 45 ec mov %eax,-0x14(%ebp)
500: eb 06 jmp 508 <printint+0x31>
} else {
x = xx;
502: 8b 45 0c mov 0xc(%ebp),%eax
505: 89 45 ec mov %eax,-0x14(%ebp)
}
i = 0;
508: c7 45 f4 00 00 00 00 movl $0x0,-0xc(%ebp)
do{
buf[i++] = digits[x % base];
50f: 8b 4d f4 mov -0xc(%ebp),%ecx
512: 8d 41 01 lea 0x1(%ecx),%eax
515: 89 45 f4 mov %eax,-0xc(%ebp)
518: 8b 5d 10 mov 0x10(%ebp),%ebx
51b: 8b 45 ec mov -0x14(%ebp),%eax
51e: ba 00 00 00 00 mov $0x0,%edx
523: f7 f3 div %ebx
525: 89 d0 mov %edx,%eax
527: 0f b6 80 ec 0b 00 00 movzbl 0xbec(%eax),%eax
52e: 88 44 0d dc mov %al,-0x24(%ebp,%ecx,1)
}while((x /= base) != 0);
532: 8b 5d 10 mov 0x10(%ebp),%ebx
535: 8b 45 ec mov -0x14(%ebp),%eax
538: ba 00 00 00 00 mov $0x0,%edx
53d: f7 f3 div %ebx
53f: 89 45 ec mov %eax,-0x14(%ebp)
542: 83 7d ec 00 cmpl $0x0,-0x14(%ebp)
546: 75 c7 jne 50f <printint+0x38>
if(neg)
548: 83 7d f0 00 cmpl $0x0,-0x10(%ebp)
54c: 74 2d je 57b <printint+0xa4>
buf[i++] = '-';
54e: 8b 45 f4 mov -0xc(%ebp),%eax
551: 8d 50 01 lea 0x1(%eax),%edx
554: 89 55 f4 mov %edx,-0xc(%ebp)
557: c6 44 05 dc 2d movb $0x2d,-0x24(%ebp,%eax,1)
while(--i >= 0)
55c: eb 1d jmp 57b <printint+0xa4>
putc(fd, buf[i]);
55e: 8d 55 dc lea -0x24(%ebp),%edx
561: 8b 45 f4 mov -0xc(%ebp),%eax
564: 01 d0 add %edx,%eax
566: 0f b6 00 movzbl (%eax),%eax
569: 0f be c0 movsbl %al,%eax
56c: 83 ec 08 sub $0x8,%esp
56f: 50 push %eax
570: ff 75 08 pushl 0x8(%ebp)
573: e8 3c ff ff ff call 4b4 <putc>
578: 83 c4 10 add $0x10,%esp
buf[i++] = digits[x % base];
}while((x /= base) != 0);
if(neg)
buf[i++] = '-';
while(--i >= 0)
57b: 83 6d f4 01 subl $0x1,-0xc(%ebp)
57f: 83 7d f4 00 cmpl $0x0,-0xc(%ebp)
583: 79 d9 jns 55e <printint+0x87>
putc(fd, buf[i]);
}
585: 90 nop
586: 8b 5d fc mov -0x4(%ebp),%ebx
589: c9 leave
58a: c3 ret
0000058b <printf>:
// Print to the given fd. Only understands %d, %x, %p, %s.
void
printf(int fd, char *fmt, ...)
{
58b: 55 push %ebp
58c: 89 e5 mov %esp,%ebp
58e: 83 ec 28 sub $0x28,%esp
char *s;
int c, i, state;
uint *ap;
state = 0;
591: c7 45 ec 00 00 00 00 movl $0x0,-0x14(%ebp)
ap = (uint*)(void*)&fmt + 1;
598: 8d 45 0c lea 0xc(%ebp),%eax
59b: 83 c0 04 add $0x4,%eax
59e: 89 45 e8 mov %eax,-0x18(%ebp)
for(i = 0; fmt[i]; i++){
5a1: c7 45 f0 00 00 00 00 movl $0x0,-0x10(%ebp)
5a8: e9 59 01 00 00 jmp 706 <printf+0x17b>
c = fmt[i] & 0xff;
5ad: 8b 55 0c mov 0xc(%ebp),%edx
5b0: 8b 45 f0 mov -0x10(%ebp),%eax
5b3: 01 d0 add %edx,%eax
5b5: 0f b6 00 movzbl (%eax),%eax
5b8: 0f be c0 movsbl %al,%eax
5bb: 25 ff 00 00 00 and $0xff,%eax
5c0: 89 45 e4 mov %eax,-0x1c(%ebp)
if(state == 0){
5c3: 83 7d ec 00 cmpl $0x0,-0x14(%ebp)
5c7: 75 2c jne 5f5 <printf+0x6a>
if(c == '%'){
5c9: 83 7d e4 25 cmpl $0x25,-0x1c(%ebp)
5cd: 75 0c jne 5db <printf+0x50>
state = '%';
5cf: c7 45 ec 25 00 00 00 movl $0x25,-0x14(%ebp)
5d6: e9 27 01 00 00 jmp 702 <printf+0x177>
} else {
putc(fd, c);
5db: 8b 45 e4 mov -0x1c(%ebp),%eax
5de: 0f be c0 movsbl %al,%eax
5e1: 83 ec 08 sub $0x8,%esp
5e4: 50 push %eax
5e5: ff 75 08 pushl 0x8(%ebp)
5e8: e8 c7 fe ff ff call 4b4 <putc>
5ed: 83 c4 10 add $0x10,%esp
5f0: e9 0d 01 00 00 jmp 702 <printf+0x177>
}
} else if(state == '%'){
5f5: 83 7d ec 25 cmpl $0x25,-0x14(%ebp)
5f9: 0f 85 03 01 00 00 jne 702 <printf+0x177>
if(c == 'd'){
5ff: 83 7d e4 64 cmpl $0x64,-0x1c(%ebp)
603: 75 1e jne 623 <printf+0x98>
printint(fd, *ap, 10, 1);
605: 8b 45 e8 mov -0x18(%ebp),%eax
608: 8b 00 mov (%eax),%eax
60a: 6a 01 push $0x1
60c: 6a 0a push $0xa
60e: 50 push %eax
60f: ff 75 08 pushl 0x8(%ebp)
612: e8 c0 fe ff ff call 4d7 <printint>
617: 83 c4 10 add $0x10,%esp
ap++;
61a: 83 45 e8 04 addl $0x4,-0x18(%ebp)
61e: e9 d8 00 00 00 jmp 6fb <printf+0x170>
} else if(c == 'x' || c == 'p'){
623: 83 7d e4 78 cmpl $0x78,-0x1c(%ebp)
627: 74 06 je 62f <printf+0xa4>
629: 83 7d e4 70 cmpl $0x70,-0x1c(%ebp)
62d: 75 1e jne 64d <printf+0xc2>
printint(fd, *ap, 16, 0);
62f: 8b 45 e8 mov -0x18(%ebp),%eax
632: 8b 00 mov (%eax),%eax
634: 6a 00 push $0x0
636: 6a 10 push $0x10
638: 50 push %eax
639: ff 75 08 pushl 0x8(%ebp)
63c: e8 96 fe ff ff call 4d7 <printint>
641: 83 c4 10 add $0x10,%esp
ap++;
644: 83 45 e8 04 addl $0x4,-0x18(%ebp)
648: e9 ae 00 00 00 jmp 6fb <printf+0x170>
} else if(c == 's'){
64d: 83 7d e4 73 cmpl $0x73,-0x1c(%ebp)
651: 75 43 jne 696 <printf+0x10b>
s = (char*)*ap;
653: 8b 45 e8 mov -0x18(%ebp),%eax
656: 8b 00 mov (%eax),%eax
658: 89 45 f4 mov %eax,-0xc(%ebp)
ap++;
65b: 83 45 e8 04 addl $0x4,-0x18(%ebp)
if(s == 0)
65f: 83 7d f4 00 cmpl $0x0,-0xc(%ebp)
663: 75 25 jne 68a <printf+0xff>
s = "(null)";
665: c7 45 f4 79 09 00 00 movl $0x979,-0xc(%ebp)
while(*s != 0){
66c: eb 1c jmp 68a <printf+0xff>
putc(fd, *s);
66e: 8b 45 f4 mov -0xc(%ebp),%eax
671: 0f b6 00 movzbl (%eax),%eax
674: 0f be c0 movsbl %al,%eax
677: 83 ec 08 sub $0x8,%esp
67a: 50 push %eax
67b: ff 75 08 pushl 0x8(%ebp)
67e: e8 31 fe ff ff call 4b4 <putc>
683: 83 c4 10 add $0x10,%esp
s++;
686: 83 45 f4 01 addl $0x1,-0xc(%ebp)
} else if(c == 's'){
s = (char*)*ap;
ap++;
if(s == 0)
s = "(null)";
while(*s != 0){
68a: 8b 45 f4 mov -0xc(%ebp),%eax
68d: 0f b6 00 movzbl (%eax),%eax
690: 84 c0 test %al,%al
692: 75 da jne 66e <printf+0xe3>
694: eb 65 jmp 6fb <printf+0x170>
putc(fd, *s);
s++;
}
} else if(c == 'c'){