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init.asm
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_init: file format elf32-i386
Disassembly of section .text:
00000000 <main>:
char *argv[] = { "sh", 0 };
int
main(void)
{
0: 8d 4c 24 04 lea 0x4(%esp),%ecx
4: 83 e4 f0 and $0xfffffff0,%esp
7: ff 71 fc pushl -0x4(%ecx)
a: 55 push %ebp
b: 89 e5 mov %esp,%ebp
d: 53 push %ebx
e: 51 push %ecx
int pid, wpid;
if(open("console", O_RDWR) < 0){
f: 83 ec 08 sub $0x8,%esp
12: 6a 02 push $0x2
14: 68 b0 07 00 00 push $0x7b0
19: e8 54 03 00 00 call 372 <open>
1e: 83 c4 10 add $0x10,%esp
21: 85 c0 test %eax,%eax
23: 0f 88 9f 00 00 00 js c8 <main+0xc8>
mknod("console", 1, 1);
open("console", O_RDWR);
}
dup(0); // stdout
29: 83 ec 0c sub $0xc,%esp
2c: 6a 00 push $0x0
2e: e8 77 03 00 00 call 3aa <dup>
dup(0); // stderr
33: c7 04 24 00 00 00 00 movl $0x0,(%esp)
3a: e8 6b 03 00 00 call 3aa <dup>
3f: 83 c4 10 add $0x10,%esp
42: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
for(;;){
printf(1, "init: starting sh\n");
48: 83 ec 08 sub $0x8,%esp
4b: 68 b8 07 00 00 push $0x7b8
50: 6a 01 push $0x1
52: e8 39 04 00 00 call 490 <printf>
pid = fork();
57: e8 ce 02 00 00 call 32a <fork>
if(pid < 0){
5c: 83 c4 10 add $0x10,%esp
5f: 85 c0 test %eax,%eax
dup(0); // stdout
dup(0); // stderr
for(;;){
printf(1, "init: starting sh\n");
pid = fork();
61: 89 c3 mov %eax,%ebx
if(pid < 0){
63: 78 2c js 91 <main+0x91>
printf(1, "init: fork failed\n");
exit();
}
if(pid == 0){
65: 74 3d je a4 <main+0xa4>
67: 89 f6 mov %esi,%esi
69: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
exec("sh", argv);
printf(1, "init: exec sh failed\n");
exit();
}
while((wpid=wait()) >= 0 && wpid != pid)
70: e8 c5 02 00 00 call 33a <wait>
75: 85 c0 test %eax,%eax
77: 78 cf js 48 <main+0x48>
79: 39 c3 cmp %eax,%ebx
7b: 74 cb je 48 <main+0x48>
printf(1, "zombie!\n");
7d: 83 ec 08 sub $0x8,%esp
80: 68 f7 07 00 00 push $0x7f7
85: 6a 01 push $0x1
87: e8 04 04 00 00 call 490 <printf>
8c: 83 c4 10 add $0x10,%esp
8f: eb df jmp 70 <main+0x70>
for(;;){
printf(1, "init: starting sh\n");
pid = fork();
if(pid < 0){
printf(1, "init: fork failed\n");
91: 53 push %ebx
92: 53 push %ebx
93: 68 cb 07 00 00 push $0x7cb
98: 6a 01 push $0x1
9a: e8 f1 03 00 00 call 490 <printf>
exit();
9f: e8 8e 02 00 00 call 332 <exit>
}
if(pid == 0){
exec("sh", argv);
a4: 50 push %eax
a5: 50 push %eax
a6: 68 a4 0a 00 00 push $0xaa4
ab: 68 de 07 00 00 push $0x7de
b0: e8 b5 02 00 00 call 36a <exec>
printf(1, "init: exec sh failed\n");
b5: 5a pop %edx
b6: 59 pop %ecx
b7: 68 e1 07 00 00 push $0x7e1
bc: 6a 01 push $0x1
be: e8 cd 03 00 00 call 490 <printf>
exit();
c3: e8 6a 02 00 00 call 332 <exit>
main(void)
{
int pid, wpid;
if(open("console", O_RDWR) < 0){
mknod("console", 1, 1);
c8: 50 push %eax
c9: 6a 01 push $0x1
cb: 6a 01 push $0x1
cd: 68 b0 07 00 00 push $0x7b0
d2: e8 a3 02 00 00 call 37a <mknod>
open("console", O_RDWR);
d7: 58 pop %eax
d8: 5a pop %edx
d9: 6a 02 push $0x2
db: 68 b0 07 00 00 push $0x7b0
e0: e8 8d 02 00 00 call 372 <open>
e5: 83 c4 10 add $0x10,%esp
e8: e9 3c ff ff ff jmp 29 <main+0x29>
ed: 66 90 xchg %ax,%ax
ef: 90 nop
000000f0 <strcpy>:
#include "user.h"
#include "x86.h"
char*
strcpy(char *s, const char *t)
{
f0: 55 push %ebp
f1: 89 e5 mov %esp,%ebp
f3: 53 push %ebx
f4: 8b 45 08 mov 0x8(%ebp),%eax
f7: 8b 4d 0c mov 0xc(%ebp),%ecx
char *os;
os = s;
while((*s++ = *t++) != 0)
fa: 89 c2 mov %eax,%edx
fc: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
100: 83 c1 01 add $0x1,%ecx
103: 0f b6 59 ff movzbl -0x1(%ecx),%ebx
107: 83 c2 01 add $0x1,%edx
10a: 84 db test %bl,%bl
10c: 88 5a ff mov %bl,-0x1(%edx)
10f: 75 ef jne 100 <strcpy+0x10>
;
return os;
}
111: 5b pop %ebx
112: 5d pop %ebp
113: c3 ret
114: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
11a: 8d bf 00 00 00 00 lea 0x0(%edi),%edi
00000120 <strcmp>:
int
strcmp(const char *p, const char *q)
{
120: 55 push %ebp
121: 89 e5 mov %esp,%ebp
123: 56 push %esi
124: 53 push %ebx
125: 8b 55 08 mov 0x8(%ebp),%edx
128: 8b 4d 0c mov 0xc(%ebp),%ecx
while(*p && *p == *q)
12b: 0f b6 02 movzbl (%edx),%eax
12e: 0f b6 19 movzbl (%ecx),%ebx
131: 84 c0 test %al,%al
133: 75 1e jne 153 <strcmp+0x33>
135: eb 29 jmp 160 <strcmp+0x40>
137: 89 f6 mov %esi,%esi
139: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
p++, q++;
140: 83 c2 01 add $0x1,%edx
}
int
strcmp(const char *p, const char *q)
{
while(*p && *p == *q)
143: 0f b6 02 movzbl (%edx),%eax
p++, q++;
146: 8d 71 01 lea 0x1(%ecx),%esi
}
int
strcmp(const char *p, const char *q)
{
while(*p && *p == *q)
149: 0f b6 59 01 movzbl 0x1(%ecx),%ebx
14d: 84 c0 test %al,%al
14f: 74 0f je 160 <strcmp+0x40>
151: 89 f1 mov %esi,%ecx
153: 38 d8 cmp %bl,%al
155: 74 e9 je 140 <strcmp+0x20>
p++, q++;
return (uchar)*p - (uchar)*q;
157: 29 d8 sub %ebx,%eax
}
159: 5b pop %ebx
15a: 5e pop %esi
15b: 5d pop %ebp
15c: c3 ret
15d: 8d 76 00 lea 0x0(%esi),%esi
}
int
strcmp(const char *p, const char *q)
{
while(*p && *p == *q)
160: 31 c0 xor %eax,%eax
p++, q++;
return (uchar)*p - (uchar)*q;
162: 29 d8 sub %ebx,%eax
}
164: 5b pop %ebx
165: 5e pop %esi
166: 5d pop %ebp
167: c3 ret
168: 90 nop
169: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
00000170 <strlen>:
uint
strlen(const char *s)
{
170: 55 push %ebp
171: 89 e5 mov %esp,%ebp
173: 8b 4d 08 mov 0x8(%ebp),%ecx
int n;
for(n = 0; s[n]; n++)
176: 80 39 00 cmpb $0x0,(%ecx)
179: 74 12 je 18d <strlen+0x1d>
17b: 31 d2 xor %edx,%edx
17d: 8d 76 00 lea 0x0(%esi),%esi
180: 83 c2 01 add $0x1,%edx
183: 80 3c 11 00 cmpb $0x0,(%ecx,%edx,1)
187: 89 d0 mov %edx,%eax
189: 75 f5 jne 180 <strlen+0x10>
;
return n;
}
18b: 5d pop %ebp
18c: c3 ret
uint
strlen(const char *s)
{
int n;
for(n = 0; s[n]; n++)
18d: 31 c0 xor %eax,%eax
;
return n;
}
18f: 5d pop %ebp
190: c3 ret
191: eb 0d jmp 1a0 <memset>
193: 90 nop
194: 90 nop
195: 90 nop
196: 90 nop
197: 90 nop
198: 90 nop
199: 90 nop
19a: 90 nop
19b: 90 nop
19c: 90 nop
19d: 90 nop
19e: 90 nop
19f: 90 nop
000001a0 <memset>:
void*
memset(void *dst, int c, uint n)
{
1a0: 55 push %ebp
1a1: 89 e5 mov %esp,%ebp
1a3: 57 push %edi
1a4: 8b 55 08 mov 0x8(%ebp),%edx
}
static inline void
stosb(void *addr, int data, int cnt)
{
asm volatile("cld; rep stosb" :
1a7: 8b 4d 10 mov 0x10(%ebp),%ecx
1aa: 8b 45 0c mov 0xc(%ebp),%eax
1ad: 89 d7 mov %edx,%edi
1af: fc cld
1b0: f3 aa rep stos %al,%es:(%edi)
stosb(dst, c, n);
return dst;
}
1b2: 89 d0 mov %edx,%eax
1b4: 5f pop %edi
1b5: 5d pop %ebp
1b6: c3 ret
1b7: 89 f6 mov %esi,%esi
1b9: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
000001c0 <strchr>:
char*
strchr(const char *s, char c)
{
1c0: 55 push %ebp
1c1: 89 e5 mov %esp,%ebp
1c3: 53 push %ebx
1c4: 8b 45 08 mov 0x8(%ebp),%eax
1c7: 8b 5d 0c mov 0xc(%ebp),%ebx
for(; *s; s++)
1ca: 0f b6 10 movzbl (%eax),%edx
1cd: 84 d2 test %dl,%dl
1cf: 74 1d je 1ee <strchr+0x2e>
if(*s == c)
1d1: 38 d3 cmp %dl,%bl
1d3: 89 d9 mov %ebx,%ecx
1d5: 75 0d jne 1e4 <strchr+0x24>
1d7: eb 17 jmp 1f0 <strchr+0x30>
1d9: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
1e0: 38 ca cmp %cl,%dl
1e2: 74 0c je 1f0 <strchr+0x30>
}
char*
strchr(const char *s, char c)
{
for(; *s; s++)
1e4: 83 c0 01 add $0x1,%eax
1e7: 0f b6 10 movzbl (%eax),%edx
1ea: 84 d2 test %dl,%dl
1ec: 75 f2 jne 1e0 <strchr+0x20>
if(*s == c)
return (char*)s;
return 0;
1ee: 31 c0 xor %eax,%eax
}
1f0: 5b pop %ebx
1f1: 5d pop %ebp
1f2: c3 ret
1f3: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
1f9: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
00000200 <gets>:
char*
gets(char *buf, int max)
{
200: 55 push %ebp
201: 89 e5 mov %esp,%ebp
203: 57 push %edi
204: 56 push %esi
205: 53 push %ebx
int i, cc;
char c;
for(i=0; i+1 < max; ){
206: 31 f6 xor %esi,%esi
cc = read(0, &c, 1);
208: 8d 7d e7 lea -0x19(%ebp),%edi
return 0;
}
char*
gets(char *buf, int max)
{
20b: 83 ec 1c sub $0x1c,%esp
int i, cc;
char c;
for(i=0; i+1 < max; ){
20e: eb 29 jmp 239 <gets+0x39>
cc = read(0, &c, 1);
210: 83 ec 04 sub $0x4,%esp
213: 6a 01 push $0x1
215: 57 push %edi
216: 6a 00 push $0x0
218: e8 2d 01 00 00 call 34a <read>
if(cc < 1)
21d: 83 c4 10 add $0x10,%esp
220: 85 c0 test %eax,%eax
222: 7e 1d jle 241 <gets+0x41>
break;
buf[i++] = c;
224: 0f b6 45 e7 movzbl -0x19(%ebp),%eax
228: 8b 55 08 mov 0x8(%ebp),%edx
22b: 89 de mov %ebx,%esi
if(c == '\n' || c == '\r')
22d: 3c 0a cmp $0xa,%al
for(i=0; i+1 < max; ){
cc = read(0, &c, 1);
if(cc < 1)
break;
buf[i++] = c;
22f: 88 44 1a ff mov %al,-0x1(%edx,%ebx,1)
if(c == '\n' || c == '\r')
233: 74 1b je 250 <gets+0x50>
235: 3c 0d cmp $0xd,%al
237: 74 17 je 250 <gets+0x50>
gets(char *buf, int max)
{
int i, cc;
char c;
for(i=0; i+1 < max; ){
239: 8d 5e 01 lea 0x1(%esi),%ebx
23c: 3b 5d 0c cmp 0xc(%ebp),%ebx
23f: 7c cf jl 210 <gets+0x10>
break;
buf[i++] = c;
if(c == '\n' || c == '\r')
break;
}
buf[i] = '\0';
241: 8b 45 08 mov 0x8(%ebp),%eax
244: c6 04 30 00 movb $0x0,(%eax,%esi,1)
return buf;
}
248: 8d 65 f4 lea -0xc(%ebp),%esp
24b: 5b pop %ebx
24c: 5e pop %esi
24d: 5f pop %edi
24e: 5d pop %ebp
24f: c3 ret
break;
buf[i++] = c;
if(c == '\n' || c == '\r')
break;
}
buf[i] = '\0';
250: 8b 45 08 mov 0x8(%ebp),%eax
gets(char *buf, int max)
{
int i, cc;
char c;
for(i=0; i+1 < max; ){
253: 89 de mov %ebx,%esi
break;
buf[i++] = c;
if(c == '\n' || c == '\r')
break;
}
buf[i] = '\0';
255: c6 04 30 00 movb $0x0,(%eax,%esi,1)
return buf;
}
259: 8d 65 f4 lea -0xc(%ebp),%esp
25c: 5b pop %ebx
25d: 5e pop %esi
25e: 5f pop %edi
25f: 5d pop %ebp
260: c3 ret
261: eb 0d jmp 270 <stat>
263: 90 nop
264: 90 nop
265: 90 nop
266: 90 nop
267: 90 nop
268: 90 nop
269: 90 nop
26a: 90 nop
26b: 90 nop
26c: 90 nop
26d: 90 nop
26e: 90 nop
26f: 90 nop
00000270 <stat>:
int
stat(const char *n, struct stat *st)
{
270: 55 push %ebp
271: 89 e5 mov %esp,%ebp
273: 56 push %esi
274: 53 push %ebx
int fd;
int r;
fd = open(n, O_RDONLY);
275: 83 ec 08 sub $0x8,%esp
278: 6a 00 push $0x0
27a: ff 75 08 pushl 0x8(%ebp)
27d: e8 f0 00 00 00 call 372 <open>
if(fd < 0)
282: 83 c4 10 add $0x10,%esp
285: 85 c0 test %eax,%eax
287: 78 27 js 2b0 <stat+0x40>
return -1;
r = fstat(fd, st);
289: 83 ec 08 sub $0x8,%esp
28c: ff 75 0c pushl 0xc(%ebp)
28f: 89 c3 mov %eax,%ebx
291: 50 push %eax
292: e8 f3 00 00 00 call 38a <fstat>
297: 89 c6 mov %eax,%esi
close(fd);
299: 89 1c 24 mov %ebx,(%esp)
29c: e8 b9 00 00 00 call 35a <close>
return r;
2a1: 83 c4 10 add $0x10,%esp
2a4: 89 f0 mov %esi,%eax
}
2a6: 8d 65 f8 lea -0x8(%ebp),%esp
2a9: 5b pop %ebx
2aa: 5e pop %esi
2ab: 5d pop %ebp
2ac: c3 ret
2ad: 8d 76 00 lea 0x0(%esi),%esi
int fd;
int r;
fd = open(n, O_RDONLY);
if(fd < 0)
return -1;
2b0: b8 ff ff ff ff mov $0xffffffff,%eax
2b5: eb ef jmp 2a6 <stat+0x36>
2b7: 89 f6 mov %esi,%esi
2b9: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
000002c0 <atoi>:
return r;
}
int
atoi(const char *s)
{
2c0: 55 push %ebp
2c1: 89 e5 mov %esp,%ebp
2c3: 53 push %ebx
2c4: 8b 4d 08 mov 0x8(%ebp),%ecx
int n;
n = 0;
while('0' <= *s && *s <= '9')
2c7: 0f be 11 movsbl (%ecx),%edx
2ca: 8d 42 d0 lea -0x30(%edx),%eax
2cd: 3c 09 cmp $0x9,%al
2cf: b8 00 00 00 00 mov $0x0,%eax
2d4: 77 1f ja 2f5 <atoi+0x35>
2d6: 8d 76 00 lea 0x0(%esi),%esi
2d9: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
n = n*10 + *s++ - '0';
2e0: 8d 04 80 lea (%eax,%eax,4),%eax
2e3: 83 c1 01 add $0x1,%ecx
2e6: 8d 44 42 d0 lea -0x30(%edx,%eax,2),%eax
atoi(const char *s)
{
int n;
n = 0;
while('0' <= *s && *s <= '9')
2ea: 0f be 11 movsbl (%ecx),%edx
2ed: 8d 5a d0 lea -0x30(%edx),%ebx
2f0: 80 fb 09 cmp $0x9,%bl
2f3: 76 eb jbe 2e0 <atoi+0x20>
n = n*10 + *s++ - '0';
return n;
}
2f5: 5b pop %ebx
2f6: 5d pop %ebp
2f7: c3 ret
2f8: 90 nop
2f9: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
00000300 <memmove>:
void*
memmove(void *vdst, const void *vsrc, int n)
{
300: 55 push %ebp
301: 89 e5 mov %esp,%ebp
303: 56 push %esi
304: 53 push %ebx
305: 8b 5d 10 mov 0x10(%ebp),%ebx
308: 8b 45 08 mov 0x8(%ebp),%eax
30b: 8b 75 0c mov 0xc(%ebp),%esi
char *dst;
const char *src;
dst = vdst;
src = vsrc;
while(n-- > 0)
30e: 85 db test %ebx,%ebx
310: 7e 14 jle 326 <memmove+0x26>
312: 31 d2 xor %edx,%edx
314: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
*dst++ = *src++;
318: 0f b6 0c 16 movzbl (%esi,%edx,1),%ecx
31c: 88 0c 10 mov %cl,(%eax,%edx,1)
31f: 83 c2 01 add $0x1,%edx
char *dst;
const char *src;
dst = vdst;
src = vsrc;
while(n-- > 0)
322: 39 da cmp %ebx,%edx
324: 75 f2 jne 318 <memmove+0x18>
*dst++ = *src++;
return vdst;
}
326: 5b pop %ebx
327: 5e pop %esi
328: 5d pop %ebp
329: c3 ret
0000032a <fork>:
name: \
movl $SYS_ ## name, %eax; \
int $T_SYSCALL; \
ret
SYSCALL(fork)
32a: b8 01 00 00 00 mov $0x1,%eax
32f: cd 40 int $0x40
331: c3 ret
00000332 <exit>:
SYSCALL(exit)
332: b8 02 00 00 00 mov $0x2,%eax
337: cd 40 int $0x40
339: c3 ret
0000033a <wait>:
SYSCALL(wait)
33a: b8 03 00 00 00 mov $0x3,%eax
33f: cd 40 int $0x40
341: c3 ret
00000342 <pipe>:
SYSCALL(pipe)
342: b8 04 00 00 00 mov $0x4,%eax
347: cd 40 int $0x40
349: c3 ret
0000034a <read>:
SYSCALL(read)
34a: b8 05 00 00 00 mov $0x5,%eax
34f: cd 40 int $0x40
351: c3 ret
00000352 <write>:
SYSCALL(write)
352: b8 10 00 00 00 mov $0x10,%eax
357: cd 40 int $0x40
359: c3 ret
0000035a <close>:
SYSCALL(close)
35a: b8 15 00 00 00 mov $0x15,%eax
35f: cd 40 int $0x40
361: c3 ret
00000362 <kill>:
SYSCALL(kill)
362: b8 06 00 00 00 mov $0x6,%eax
367: cd 40 int $0x40
369: c3 ret
0000036a <exec>:
SYSCALL(exec)
36a: b8 07 00 00 00 mov $0x7,%eax
36f: cd 40 int $0x40
371: c3 ret
00000372 <open>:
SYSCALL(open)
372: b8 0f 00 00 00 mov $0xf,%eax
377: cd 40 int $0x40
379: c3 ret
0000037a <mknod>:
SYSCALL(mknod)
37a: b8 11 00 00 00 mov $0x11,%eax
37f: cd 40 int $0x40
381: c3 ret
00000382 <unlink>:
SYSCALL(unlink)
382: b8 12 00 00 00 mov $0x12,%eax
387: cd 40 int $0x40
389: c3 ret
0000038a <fstat>:
SYSCALL(fstat)
38a: b8 08 00 00 00 mov $0x8,%eax
38f: cd 40 int $0x40
391: c3 ret
00000392 <link>:
SYSCALL(link)
392: b8 13 00 00 00 mov $0x13,%eax
397: cd 40 int $0x40
399: c3 ret
0000039a <mkdir>:
SYSCALL(mkdir)
39a: b8 14 00 00 00 mov $0x14,%eax
39f: cd 40 int $0x40
3a1: c3 ret
000003a2 <chdir>:
SYSCALL(chdir)
3a2: b8 09 00 00 00 mov $0x9,%eax
3a7: cd 40 int $0x40
3a9: c3 ret
000003aa <dup>:
SYSCALL(dup)
3aa: b8 0a 00 00 00 mov $0xa,%eax
3af: cd 40 int $0x40
3b1: c3 ret
000003b2 <getpid>:
SYSCALL(getpid)
3b2: b8 0b 00 00 00 mov $0xb,%eax
3b7: cd 40 int $0x40
3b9: c3 ret
000003ba <sbrk>:
SYSCALL(sbrk)
3ba: b8 0c 00 00 00 mov $0xc,%eax
3bf: cd 40 int $0x40
3c1: c3 ret
000003c2 <sleep>:
SYSCALL(sleep)
3c2: b8 0d 00 00 00 mov $0xd,%eax
3c7: cd 40 int $0x40
3c9: c3 ret
000003ca <uptime>:
SYSCALL(uptime)
3ca: b8 0e 00 00 00 mov $0xe,%eax
3cf: cd 40 int $0x40
3d1: c3 ret
000003d2 <trace>:
SYSCALL(trace)
3d2: b8 16 00 00 00 mov $0x16,%eax
3d7: cd 40 int $0x40
3d9: c3 ret
000003da <date>:
SYSCALL(date)
3da: b8 17 00 00 00 mov $0x17,%eax
3df: cd 40 int $0x40
3e1: c3 ret
3e2: 66 90 xchg %ax,%ax
3e4: 66 90 xchg %ax,%ax
3e6: 66 90 xchg %ax,%ax
3e8: 66 90 xchg %ax,%ax
3ea: 66 90 xchg %ax,%ax
3ec: 66 90 xchg %ax,%ax
3ee: 66 90 xchg %ax,%ax
000003f0 <printint>:
write(fd, &c, 1);
}
static void
printint(int fd, int xx, int base, int sgn)
{
3f0: 55 push %ebp
3f1: 89 e5 mov %esp,%ebp
3f3: 57 push %edi
3f4: 56 push %esi
3f5: 53 push %ebx
3f6: 89 c6 mov %eax,%esi
3f8: 83 ec 3c sub $0x3c,%esp
char buf[16];
int i, neg;
uint x;
neg = 0;
if(sgn && xx < 0){
3fb: 8b 5d 08 mov 0x8(%ebp),%ebx
3fe: 85 db test %ebx,%ebx
400: 74 7e je 480 <printint+0x90>
402: 89 d0 mov %edx,%eax
404: c1 e8 1f shr $0x1f,%eax
407: 84 c0 test %al,%al
409: 74 75 je 480 <printint+0x90>
neg = 1;
x = -xx;
40b: 89 d0 mov %edx,%eax
int i, neg;
uint x;
neg = 0;
if(sgn && xx < 0){
neg = 1;
40d: c7 45 c4 01 00 00 00 movl $0x1,-0x3c(%ebp)
x = -xx;
414: f7 d8 neg %eax
416: 89 75 c0 mov %esi,-0x40(%ebp)
} else {
x = xx;
}
i = 0;
419: 31 ff xor %edi,%edi
41b: 8d 5d d7 lea -0x29(%ebp),%ebx
41e: 89 ce mov %ecx,%esi
420: eb 08 jmp 42a <printint+0x3a>
422: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
do{
buf[i++] = digits[x % base];
428: 89 cf mov %ecx,%edi
42a: 31 d2 xor %edx,%edx
42c: 8d 4f 01 lea 0x1(%edi),%ecx
42f: f7 f6 div %esi
431: 0f b6 92 08 08 00 00 movzbl 0x808(%edx),%edx
}while((x /= base) != 0);
438: 85 c0 test %eax,%eax
x = xx;
}
i = 0;
do{
buf[i++] = digits[x % base];
43a: 88 14 0b mov %dl,(%ebx,%ecx,1)
}while((x /= base) != 0);
43d: 75 e9 jne 428 <printint+0x38>
if(neg)
43f: 8b 45 c4 mov -0x3c(%ebp),%eax
442: 8b 75 c0 mov -0x40(%ebp),%esi
445: 85 c0 test %eax,%eax
447: 74 08 je 451 <printint+0x61>
buf[i++] = '-';
449: c6 44 0d d8 2d movb $0x2d,-0x28(%ebp,%ecx,1)
44e: 8d 4f 02 lea 0x2(%edi),%ecx
451: 8d 7c 0d d7 lea -0x29(%ebp,%ecx,1),%edi
455: 8d 76 00 lea 0x0(%esi),%esi
458: 0f b6 07 movzbl (%edi),%eax
#include "user.h"
static void
putc(int fd, char c)
{
write(fd, &c, 1);
45b: 83 ec 04 sub $0x4,%esp
45e: 83 ef 01 sub $0x1,%edi
461: 6a 01 push $0x1
463: 53 push %ebx
464: 56 push %esi
465: 88 45 d7 mov %al,-0x29(%ebp)
468: e8 e5 fe ff ff call 352 <write>
buf[i++] = digits[x % base];
}while((x /= base) != 0);
if(neg)
buf[i++] = '-';
while(--i >= 0)
46d: 83 c4 10 add $0x10,%esp
470: 39 df cmp %ebx,%edi
472: 75 e4 jne 458 <printint+0x68>
putc(fd, buf[i]);
}
474: 8d 65 f4 lea -0xc(%ebp),%esp
477: 5b pop %ebx
478: 5e pop %esi
479: 5f pop %edi
47a: 5d pop %ebp
47b: c3 ret
47c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
neg = 0;
if(sgn && xx < 0){
neg = 1;
x = -xx;
} else {
x = xx;
480: 89 d0 mov %edx,%eax
static char digits[] = "0123456789ABCDEF";
char buf[16];
int i, neg;
uint x;
neg = 0;
482: c7 45 c4 00 00 00 00 movl $0x0,-0x3c(%ebp)
489: eb 8b jmp 416 <printint+0x26>
48b: 90 nop
48c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
00000490 <printf>:
}
// Print to the given fd. Only understands %d, %x, %p, %s.
void
printf(int fd, const char *fmt, ...)
{
490: 55 push %ebp
491: 89 e5 mov %esp,%ebp
493: 57 push %edi
494: 56 push %esi
495: 53 push %ebx
int c, i, state;
uint *ap;
state = 0;
ap = (uint*)(void*)&fmt + 1;
for(i = 0; fmt[i]; i++){
496: 8d 45 10 lea 0x10(%ebp),%eax
}
// Print to the given fd. Only understands %d, %x, %p, %s.
void
printf(int fd, const char *fmt, ...)
{
499: 83 ec 2c sub $0x2c,%esp
int c, i, state;
uint *ap;
state = 0;
ap = (uint*)(void*)&fmt + 1;
for(i = 0; fmt[i]; i++){
49c: 8b 75 0c mov 0xc(%ebp),%esi
}
// Print to the given fd. Only understands %d, %x, %p, %s.
void
printf(int fd, const char *fmt, ...)
{
49f: 8b 7d 08 mov 0x8(%ebp),%edi
int c, i, state;
uint *ap;
state = 0;
ap = (uint*)(void*)&fmt + 1;
for(i = 0; fmt[i]; i++){
4a2: 89 45 d0 mov %eax,-0x30(%ebp)
4a5: 0f b6 1e movzbl (%esi),%ebx
4a8: 83 c6 01 add $0x1,%esi
4ab: 84 db test %bl,%bl
4ad: 0f 84 b0 00 00 00 je 563 <printf+0xd3>
4b3: 31 d2 xor %edx,%edx
4b5: eb 39 jmp 4f0 <printf+0x60>
4b7: 89 f6 mov %esi,%esi
4b9: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
c = fmt[i] & 0xff;
if(state == 0){
if(c == '%'){
4c0: 83 f8 25 cmp $0x25,%eax
4c3: 89 55 d4 mov %edx,-0x2c(%ebp)
state = '%';
4c6: ba 25 00 00 00 mov $0x25,%edx
state = 0;
ap = (uint*)(void*)&fmt + 1;
for(i = 0; fmt[i]; i++){
c = fmt[i] & 0xff;
if(state == 0){
if(c == '%'){
4cb: 74 18 je 4e5 <printf+0x55>
#include "user.h"
static void
putc(int fd, char c)
{
write(fd, &c, 1);
4cd: 8d 45 e2 lea -0x1e(%ebp),%eax
4d0: 83 ec 04 sub $0x4,%esp
4d3: 88 5d e2 mov %bl,-0x1e(%ebp)
4d6: 6a 01 push $0x1
4d8: 50 push %eax
4d9: 57 push %edi
4da: e8 73 fe ff ff call 352 <write>
4df: 8b 55 d4 mov -0x2c(%ebp),%edx
4e2: 83 c4 10 add $0x10,%esp
4e5: 83 c6 01 add $0x1,%esi
int c, i, state;
uint *ap;
state = 0;
ap = (uint*)(void*)&fmt + 1;
for(i = 0; fmt[i]; i++){
4e8: 0f b6 5e ff movzbl -0x1(%esi),%ebx