1158 lines
39 KiB
NASM
1158 lines
39 KiB
NASM
|
|
_zombie: file format elf32-i386
|
|
|
|
|
|
Disassembly of section .text:
|
|
|
|
00000000 <main>:
|
|
|
|
#include "types.h"
|
|
#include "stat.h"
|
|
#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 push -0x4(%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 65 02 00 00 call 27b <fork>
|
|
16: 85 c0 test %eax,%eax
|
|
18: 7e 0d jle 27 <main+0x27>
|
|
sleep(5); // Let child exit before parent.
|
|
1a: 83 ec 0c sub $0xc,%esp
|
|
1d: 6a 05 push $0x5
|
|
1f: e8 b7 02 00 00 call 2db <sleep>
|
|
24: 83 c4 10 add $0x10,%esp
|
|
}
|
|
exit();
|
|
27: e8 57 02 00 00 call 283 <exit>
|
|
2c: 66 90 xchg %ax,%ax
|
|
2e: 66 90 xchg %ax,%ax
|
|
|
|
00000030 <strcpy>:
|
|
#include "stat.h"
|
|
#include "fcntl.h"
|
|
#include "user.h"
|
|
#include "x86.h"
|
|
|
|
char*strcpy(char *s, const char *t) {
|
|
30: 55 push %ebp
|
|
char *os;
|
|
|
|
os = s;
|
|
while ((*s++ = *t++) != 0) {
|
|
31: 31 c0 xor %eax,%eax
|
|
char*strcpy(char *s, const char *t) {
|
|
33: 89 e5 mov %esp,%ebp
|
|
35: 53 push %ebx
|
|
36: 8b 4d 08 mov 0x8(%ebp),%ecx
|
|
39: 8b 5d 0c mov 0xc(%ebp),%ebx
|
|
3c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
while ((*s++ = *t++) != 0) {
|
|
40: 0f b6 14 03 movzbl (%ebx,%eax,1),%edx
|
|
44: 88 14 01 mov %dl,(%ecx,%eax,1)
|
|
47: 83 c0 01 add $0x1,%eax
|
|
4a: 84 d2 test %dl,%dl
|
|
4c: 75 f2 jne 40 <strcpy+0x10>
|
|
;
|
|
}
|
|
return os;
|
|
}
|
|
4e: 8b 5d fc mov -0x4(%ebp),%ebx
|
|
51: 89 c8 mov %ecx,%eax
|
|
53: c9 leave
|
|
54: c3 ret
|
|
55: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
5c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
|
|
00000060 <strcmp>:
|
|
|
|
int strcmp(const char *p, const char *q) {
|
|
60: 55 push %ebp
|
|
61: 89 e5 mov %esp,%ebp
|
|
63: 53 push %ebx
|
|
64: 8b 55 08 mov 0x8(%ebp),%edx
|
|
67: 8b 4d 0c mov 0xc(%ebp),%ecx
|
|
while (*p && *p == *q) {
|
|
6a: 0f b6 02 movzbl (%edx),%eax
|
|
6d: 84 c0 test %al,%al
|
|
6f: 75 17 jne 88 <strcmp+0x28>
|
|
71: eb 3a jmp ad <strcmp+0x4d>
|
|
73: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
77: 90 nop
|
|
78: 0f b6 42 01 movzbl 0x1(%edx),%eax
|
|
p++, q++;
|
|
7c: 83 c2 01 add $0x1,%edx
|
|
7f: 8d 59 01 lea 0x1(%ecx),%ebx
|
|
while (*p && *p == *q) {
|
|
82: 84 c0 test %al,%al
|
|
84: 74 1a je a0 <strcmp+0x40>
|
|
p++, q++;
|
|
86: 89 d9 mov %ebx,%ecx
|
|
while (*p && *p == *q) {
|
|
88: 0f b6 19 movzbl (%ecx),%ebx
|
|
8b: 38 c3 cmp %al,%bl
|
|
8d: 74 e9 je 78 <strcmp+0x18>
|
|
}
|
|
return (uchar) * p - (uchar) * q;
|
|
8f: 29 d8 sub %ebx,%eax
|
|
}
|
|
91: 8b 5d fc mov -0x4(%ebp),%ebx
|
|
94: c9 leave
|
|
95: c3 ret
|
|
96: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
9d: 8d 76 00 lea 0x0(%esi),%esi
|
|
return (uchar) * p - (uchar) * q;
|
|
a0: 0f b6 59 01 movzbl 0x1(%ecx),%ebx
|
|
a4: 31 c0 xor %eax,%eax
|
|
a6: 29 d8 sub %ebx,%eax
|
|
}
|
|
a8: 8b 5d fc mov -0x4(%ebp),%ebx
|
|
ab: c9 leave
|
|
ac: c3 ret
|
|
return (uchar) * p - (uchar) * q;
|
|
ad: 0f b6 19 movzbl (%ecx),%ebx
|
|
b0: 31 c0 xor %eax,%eax
|
|
b2: eb db jmp 8f <strcmp+0x2f>
|
|
b4: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
bb: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
bf: 90 nop
|
|
|
|
000000c0 <strlen>:
|
|
|
|
uint strlen(const char *s) {
|
|
c0: 55 push %ebp
|
|
c1: 89 e5 mov %esp,%ebp
|
|
c3: 8b 55 08 mov 0x8(%ebp),%edx
|
|
int n;
|
|
|
|
for (n = 0; s[n]; n++) {
|
|
c6: 80 3a 00 cmpb $0x0,(%edx)
|
|
c9: 74 15 je e0 <strlen+0x20>
|
|
cb: 31 c0 xor %eax,%eax
|
|
cd: 8d 76 00 lea 0x0(%esi),%esi
|
|
d0: 83 c0 01 add $0x1,%eax
|
|
d3: 80 3c 02 00 cmpb $0x0,(%edx,%eax,1)
|
|
d7: 89 c1 mov %eax,%ecx
|
|
d9: 75 f5 jne d0 <strlen+0x10>
|
|
;
|
|
}
|
|
return n;
|
|
}
|
|
db: 89 c8 mov %ecx,%eax
|
|
dd: 5d pop %ebp
|
|
de: c3 ret
|
|
df: 90 nop
|
|
for (n = 0; s[n]; n++) {
|
|
e0: 31 c9 xor %ecx,%ecx
|
|
}
|
|
e2: 5d pop %ebp
|
|
e3: 89 c8 mov %ecx,%eax
|
|
e5: c3 ret
|
|
e6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
ed: 8d 76 00 lea 0x0(%esi),%esi
|
|
|
|
000000f0 <memset>:
|
|
|
|
void* memset(void *dst, int c, uint n) {
|
|
f0: 55 push %ebp
|
|
f1: 89 e5 mov %esp,%ebp
|
|
f3: 57 push %edi
|
|
f4: 8b 55 08 mov 0x8(%ebp),%edx
|
|
"d" (port), "0" (addr), "1" (cnt) :
|
|
"cc");
|
|
}
|
|
|
|
static inline void stosb(void *addr, int data, int cnt) {
|
|
asm volatile ("cld; rep stosb" :
|
|
f7: 8b 4d 10 mov 0x10(%ebp),%ecx
|
|
fa: 8b 45 0c mov 0xc(%ebp),%eax
|
|
fd: 89 d7 mov %edx,%edi
|
|
ff: fc cld
|
|
100: f3 aa rep stos %al,%es:(%edi)
|
|
stosb(dst, c, n);
|
|
return dst;
|
|
}
|
|
102: 8b 7d fc mov -0x4(%ebp),%edi
|
|
105: 89 d0 mov %edx,%eax
|
|
107: c9 leave
|
|
108: c3 ret
|
|
109: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
|
|
00000110 <strchr>:
|
|
|
|
char* strchr(const char *s, char c) {
|
|
110: 55 push %ebp
|
|
111: 89 e5 mov %esp,%ebp
|
|
113: 8b 45 08 mov 0x8(%ebp),%eax
|
|
116: 0f b6 4d 0c movzbl 0xc(%ebp),%ecx
|
|
for (; *s; s++) {
|
|
11a: 0f b6 10 movzbl (%eax),%edx
|
|
11d: 84 d2 test %dl,%dl
|
|
11f: 75 12 jne 133 <strchr+0x23>
|
|
121: eb 1d jmp 140 <strchr+0x30>
|
|
123: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
127: 90 nop
|
|
128: 0f b6 50 01 movzbl 0x1(%eax),%edx
|
|
12c: 83 c0 01 add $0x1,%eax
|
|
12f: 84 d2 test %dl,%dl
|
|
131: 74 0d je 140 <strchr+0x30>
|
|
if (*s == c) {
|
|
133: 38 d1 cmp %dl,%cl
|
|
135: 75 f1 jne 128 <strchr+0x18>
|
|
return (char*)s;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
137: 5d pop %ebp
|
|
138: c3 ret
|
|
139: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
return 0;
|
|
140: 31 c0 xor %eax,%eax
|
|
}
|
|
142: 5d pop %ebp
|
|
143: c3 ret
|
|
144: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
14b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
14f: 90 nop
|
|
|
|
00000150 <gets>:
|
|
|
|
char* gets(char *buf, int max) {
|
|
150: 55 push %ebp
|
|
151: 89 e5 mov %esp,%ebp
|
|
153: 57 push %edi
|
|
154: 56 push %esi
|
|
int i, cc;
|
|
char c;
|
|
|
|
for (i = 0; i + 1 < max;) {
|
|
cc = read(0, &c, 1);
|
|
155: 8d 7d e7 lea -0x19(%ebp),%edi
|
|
char* gets(char *buf, int max) {
|
|
158: 53 push %ebx
|
|
for (i = 0; i + 1 < max;) {
|
|
159: 31 db xor %ebx,%ebx
|
|
char* gets(char *buf, int max) {
|
|
15b: 83 ec 1c sub $0x1c,%esp
|
|
for (i = 0; i + 1 < max;) {
|
|
15e: eb 27 jmp 187 <gets+0x37>
|
|
cc = read(0, &c, 1);
|
|
160: 83 ec 04 sub $0x4,%esp
|
|
163: 6a 01 push $0x1
|
|
165: 57 push %edi
|
|
166: 6a 00 push $0x0
|
|
168: e8 2e 01 00 00 call 29b <read>
|
|
if (cc < 1) {
|
|
16d: 83 c4 10 add $0x10,%esp
|
|
170: 85 c0 test %eax,%eax
|
|
172: 7e 1d jle 191 <gets+0x41>
|
|
break;
|
|
}
|
|
buf[i++] = c;
|
|
174: 0f b6 45 e7 movzbl -0x19(%ebp),%eax
|
|
178: 8b 55 08 mov 0x8(%ebp),%edx
|
|
17b: 88 44 1a ff mov %al,-0x1(%edx,%ebx,1)
|
|
if (c == '\n' || c == '\r') {
|
|
17f: 3c 0a cmp $0xa,%al
|
|
181: 74 1d je 1a0 <gets+0x50>
|
|
183: 3c 0d cmp $0xd,%al
|
|
185: 74 19 je 1a0 <gets+0x50>
|
|
for (i = 0; i + 1 < max;) {
|
|
187: 89 de mov %ebx,%esi
|
|
189: 83 c3 01 add $0x1,%ebx
|
|
18c: 3b 5d 0c cmp 0xc(%ebp),%ebx
|
|
18f: 7c cf jl 160 <gets+0x10>
|
|
break;
|
|
}
|
|
}
|
|
buf[i] = '\0';
|
|
191: 8b 45 08 mov 0x8(%ebp),%eax
|
|
194: c6 04 30 00 movb $0x0,(%eax,%esi,1)
|
|
return buf;
|
|
}
|
|
198: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
19b: 5b pop %ebx
|
|
19c: 5e pop %esi
|
|
19d: 5f pop %edi
|
|
19e: 5d pop %ebp
|
|
19f: c3 ret
|
|
buf[i] = '\0';
|
|
1a0: 8b 45 08 mov 0x8(%ebp),%eax
|
|
1a3: 89 de mov %ebx,%esi
|
|
1a5: c6 04 30 00 movb $0x0,(%eax,%esi,1)
|
|
}
|
|
1a9: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
1ac: 5b pop %ebx
|
|
1ad: 5e pop %esi
|
|
1ae: 5f pop %edi
|
|
1af: 5d pop %ebp
|
|
1b0: c3 ret
|
|
1b1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
1b8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
1bf: 90 nop
|
|
|
|
000001c0 <stat>:
|
|
|
|
int stat(const char *n, struct stat *st) {
|
|
1c0: 55 push %ebp
|
|
1c1: 89 e5 mov %esp,%ebp
|
|
1c3: 56 push %esi
|
|
1c4: 53 push %ebx
|
|
int fd;
|
|
int r;
|
|
|
|
fd = open(n, O_RDONLY);
|
|
1c5: 83 ec 08 sub $0x8,%esp
|
|
1c8: 6a 00 push $0x0
|
|
1ca: ff 75 08 push 0x8(%ebp)
|
|
1cd: e8 19 01 00 00 call 2eb <open>
|
|
if (fd < 0) {
|
|
1d2: 83 c4 10 add $0x10,%esp
|
|
1d5: 85 c0 test %eax,%eax
|
|
1d7: 78 27 js 200 <stat+0x40>
|
|
return -1;
|
|
}
|
|
r = fstat(fd, st);
|
|
1d9: 83 ec 08 sub $0x8,%esp
|
|
1dc: ff 75 0c push 0xc(%ebp)
|
|
1df: 89 c3 mov %eax,%ebx
|
|
1e1: 50 push %eax
|
|
1e2: e8 cc 00 00 00 call 2b3 <fstat>
|
|
close(fd);
|
|
1e7: 89 1c 24 mov %ebx,(%esp)
|
|
r = fstat(fd, st);
|
|
1ea: 89 c6 mov %eax,%esi
|
|
close(fd);
|
|
1ec: e8 2a 01 00 00 call 31b <close>
|
|
return r;
|
|
1f1: 83 c4 10 add $0x10,%esp
|
|
}
|
|
1f4: 8d 65 f8 lea -0x8(%ebp),%esp
|
|
1f7: 89 f0 mov %esi,%eax
|
|
1f9: 5b pop %ebx
|
|
1fa: 5e pop %esi
|
|
1fb: 5d pop %ebp
|
|
1fc: c3 ret
|
|
1fd: 8d 76 00 lea 0x0(%esi),%esi
|
|
return -1;
|
|
200: be ff ff ff ff mov $0xffffffff,%esi
|
|
205: eb ed jmp 1f4 <stat+0x34>
|
|
207: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
20e: 66 90 xchg %ax,%ax
|
|
|
|
00000210 <atoi>:
|
|
|
|
int atoi(const char *s) {
|
|
210: 55 push %ebp
|
|
211: 89 e5 mov %esp,%ebp
|
|
213: 53 push %ebx
|
|
214: 8b 55 08 mov 0x8(%ebp),%edx
|
|
int n;
|
|
|
|
n = 0;
|
|
while ('0' <= *s && *s <= '9') {
|
|
217: 0f be 02 movsbl (%edx),%eax
|
|
21a: 8d 48 d0 lea -0x30(%eax),%ecx
|
|
21d: 80 f9 09 cmp $0x9,%cl
|
|
n = 0;
|
|
220: b9 00 00 00 00 mov $0x0,%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
225: 77 1e ja 245 <atoi+0x35>
|
|
227: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
22e: 66 90 xchg %ax,%ax
|
|
n = n * 10 + *s++ - '0';
|
|
230: 83 c2 01 add $0x1,%edx
|
|
233: 8d 0c 89 lea (%ecx,%ecx,4),%ecx
|
|
236: 8d 4c 48 d0 lea -0x30(%eax,%ecx,2),%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
23a: 0f be 02 movsbl (%edx),%eax
|
|
23d: 8d 58 d0 lea -0x30(%eax),%ebx
|
|
240: 80 fb 09 cmp $0x9,%bl
|
|
243: 76 eb jbe 230 <atoi+0x20>
|
|
}
|
|
return n;
|
|
}
|
|
245: 8b 5d fc mov -0x4(%ebp),%ebx
|
|
248: 89 c8 mov %ecx,%eax
|
|
24a: c9 leave
|
|
24b: c3 ret
|
|
24c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
|
|
00000250 <memmove>:
|
|
|
|
void* memmove(void *vdst, const void *vsrc, int n) {
|
|
250: 55 push %ebp
|
|
251: 89 e5 mov %esp,%ebp
|
|
253: 57 push %edi
|
|
254: 8b 45 10 mov 0x10(%ebp),%eax
|
|
257: 8b 55 08 mov 0x8(%ebp),%edx
|
|
25a: 56 push %esi
|
|
25b: 8b 75 0c mov 0xc(%ebp),%esi
|
|
char *dst;
|
|
const char *src;
|
|
|
|
dst = vdst;
|
|
src = vsrc;
|
|
while (n-- > 0) {
|
|
25e: 85 c0 test %eax,%eax
|
|
260: 7e 13 jle 275 <memmove+0x25>
|
|
262: 01 d0 add %edx,%eax
|
|
dst = vdst;
|
|
264: 89 d7 mov %edx,%edi
|
|
266: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
26d: 8d 76 00 lea 0x0(%esi),%esi
|
|
*dst++ = *src++;
|
|
270: a4 movsb %ds:(%esi),%es:(%edi)
|
|
while (n-- > 0) {
|
|
271: 39 f8 cmp %edi,%eax
|
|
273: 75 fb jne 270 <memmove+0x20>
|
|
}
|
|
return vdst;
|
|
}
|
|
275: 5e pop %esi
|
|
276: 89 d0 mov %edx,%eax
|
|
278: 5f pop %edi
|
|
279: 5d pop %ebp
|
|
27a: c3 ret
|
|
|
|
0000027b <fork>:
|
|
name: \
|
|
movl $SYS_ ## name, %eax; \
|
|
int $T_SYSCALL; \
|
|
ret
|
|
|
|
SYSCALL(fork)
|
|
27b: b8 01 00 00 00 mov $0x1,%eax
|
|
280: cd 40 int $0x40
|
|
282: c3 ret
|
|
|
|
00000283 <exit>:
|
|
SYSCALL(exit)
|
|
283: b8 02 00 00 00 mov $0x2,%eax
|
|
288: cd 40 int $0x40
|
|
28a: c3 ret
|
|
|
|
0000028b <wait>:
|
|
SYSCALL(wait)
|
|
28b: b8 03 00 00 00 mov $0x3,%eax
|
|
290: cd 40 int $0x40
|
|
292: c3 ret
|
|
|
|
00000293 <pipe>:
|
|
SYSCALL(pipe)
|
|
293: b8 04 00 00 00 mov $0x4,%eax
|
|
298: cd 40 int $0x40
|
|
29a: c3 ret
|
|
|
|
0000029b <read>:
|
|
SYSCALL(read)
|
|
29b: b8 05 00 00 00 mov $0x5,%eax
|
|
2a0: cd 40 int $0x40
|
|
2a2: c3 ret
|
|
|
|
000002a3 <kill>:
|
|
SYSCALL(kill)
|
|
2a3: b8 06 00 00 00 mov $0x6,%eax
|
|
2a8: cd 40 int $0x40
|
|
2aa: c3 ret
|
|
|
|
000002ab <exec>:
|
|
SYSCALL(exec)
|
|
2ab: b8 07 00 00 00 mov $0x7,%eax
|
|
2b0: cd 40 int $0x40
|
|
2b2: c3 ret
|
|
|
|
000002b3 <fstat>:
|
|
SYSCALL(fstat)
|
|
2b3: b8 08 00 00 00 mov $0x8,%eax
|
|
2b8: cd 40 int $0x40
|
|
2ba: c3 ret
|
|
|
|
000002bb <chdir>:
|
|
SYSCALL(chdir)
|
|
2bb: b8 09 00 00 00 mov $0x9,%eax
|
|
2c0: cd 40 int $0x40
|
|
2c2: c3 ret
|
|
|
|
000002c3 <dup>:
|
|
SYSCALL(dup)
|
|
2c3: b8 0a 00 00 00 mov $0xa,%eax
|
|
2c8: cd 40 int $0x40
|
|
2ca: c3 ret
|
|
|
|
000002cb <getpid>:
|
|
SYSCALL(getpid)
|
|
2cb: b8 0b 00 00 00 mov $0xb,%eax
|
|
2d0: cd 40 int $0x40
|
|
2d2: c3 ret
|
|
|
|
000002d3 <sbrk>:
|
|
SYSCALL(sbrk)
|
|
2d3: b8 0c 00 00 00 mov $0xc,%eax
|
|
2d8: cd 40 int $0x40
|
|
2da: c3 ret
|
|
|
|
000002db <sleep>:
|
|
SYSCALL(sleep)
|
|
2db: b8 0d 00 00 00 mov $0xd,%eax
|
|
2e0: cd 40 int $0x40
|
|
2e2: c3 ret
|
|
|
|
000002e3 <uptime>:
|
|
SYSCALL(uptime)
|
|
2e3: b8 0e 00 00 00 mov $0xe,%eax
|
|
2e8: cd 40 int $0x40
|
|
2ea: c3 ret
|
|
|
|
000002eb <open>:
|
|
SYSCALL(open)
|
|
2eb: b8 0f 00 00 00 mov $0xf,%eax
|
|
2f0: cd 40 int $0x40
|
|
2f2: c3 ret
|
|
|
|
000002f3 <write>:
|
|
SYSCALL(write)
|
|
2f3: b8 10 00 00 00 mov $0x10,%eax
|
|
2f8: cd 40 int $0x40
|
|
2fa: c3 ret
|
|
|
|
000002fb <mknod>:
|
|
SYSCALL(mknod)
|
|
2fb: b8 11 00 00 00 mov $0x11,%eax
|
|
300: cd 40 int $0x40
|
|
302: c3 ret
|
|
|
|
00000303 <unlink>:
|
|
SYSCALL(unlink)
|
|
303: b8 12 00 00 00 mov $0x12,%eax
|
|
308: cd 40 int $0x40
|
|
30a: c3 ret
|
|
|
|
0000030b <link>:
|
|
SYSCALL(link)
|
|
30b: b8 13 00 00 00 mov $0x13,%eax
|
|
310: cd 40 int $0x40
|
|
312: c3 ret
|
|
|
|
00000313 <mkdir>:
|
|
SYSCALL(mkdir)
|
|
313: b8 14 00 00 00 mov $0x14,%eax
|
|
318: cd 40 int $0x40
|
|
31a: c3 ret
|
|
|
|
0000031b <close>:
|
|
SYSCALL(close)
|
|
31b: b8 15 00 00 00 mov $0x15,%eax
|
|
320: cd 40 int $0x40
|
|
322: c3 ret
|
|
|
|
00000323 <getch>:
|
|
SYSCALL(getch)
|
|
323: b8 16 00 00 00 mov $0x16,%eax
|
|
328: cd 40 int $0x40
|
|
32a: c3 ret
|
|
|
|
0000032b <greeting>:
|
|
SYSCALL(greeting)
|
|
32b: b8 17 00 00 00 mov $0x17,%eax
|
|
330: cd 40 int $0x40
|
|
332: c3 ret
|
|
|
|
00000333 <shutdown>:
|
|
SYSCALL(shutdown)
|
|
333: b8 18 00 00 00 mov $0x18,%eax
|
|
338: cd 40 int $0x40
|
|
33a: c3 ret
|
|
|
|
0000033b <screen>:
|
|
SYSCALL(screen)
|
|
33b: b8 19 00 00 00 mov $0x19,%eax
|
|
340: cd 40 int $0x40
|
|
342: c3 ret
|
|
|
|
00000343 <cls>:
|
|
SYSCALL(cls)
|
|
343: b8 1a 00 00 00 mov $0x1a,%eax
|
|
348: cd 40 int $0x40
|
|
34a: c3 ret
|
|
34b: 66 90 xchg %ax,%ax
|
|
34d: 66 90 xchg %ax,%ax
|
|
34f: 90 nop
|
|
|
|
00000350 <printint>:
|
|
|
|
static void putc(int fd, char c) {
|
|
write(fd, &c, 1);
|
|
}
|
|
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
350: 55 push %ebp
|
|
351: 89 e5 mov %esp,%ebp
|
|
353: 57 push %edi
|
|
354: 56 push %esi
|
|
355: 53 push %ebx
|
|
356: 83 ec 3c sub $0x3c,%esp
|
|
359: 89 4d c4 mov %ecx,-0x3c(%ebp)
|
|
uint x;
|
|
|
|
neg = 0;
|
|
if (sgn && xx < 0) {
|
|
neg = 1;
|
|
x = -xx;
|
|
35c: 89 d1 mov %edx,%ecx
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
35e: 89 45 b8 mov %eax,-0x48(%ebp)
|
|
if (sgn && xx < 0) {
|
|
361: 85 d2 test %edx,%edx
|
|
363: 0f 89 7f 00 00 00 jns 3e8 <printint+0x98>
|
|
369: f6 45 08 01 testb $0x1,0x8(%ebp)
|
|
36d: 74 79 je 3e8 <printint+0x98>
|
|
neg = 1;
|
|
36f: c7 45 bc 01 00 00 00 movl $0x1,-0x44(%ebp)
|
|
x = -xx;
|
|
376: f7 d9 neg %ecx
|
|
}
|
|
else {
|
|
x = xx;
|
|
}
|
|
|
|
i = 0;
|
|
378: 31 db xor %ebx,%ebx
|
|
37a: 8d 75 d7 lea -0x29(%ebp),%esi
|
|
37d: 8d 76 00 lea 0x0(%esi),%esi
|
|
do {
|
|
buf[i++] = digits[x % base];
|
|
380: 89 c8 mov %ecx,%eax
|
|
382: 31 d2 xor %edx,%edx
|
|
384: 89 cf mov %ecx,%edi
|
|
386: f7 75 c4 divl -0x3c(%ebp)
|
|
389: 0f b6 92 88 07 00 00 movzbl 0x788(%edx),%edx
|
|
390: 89 45 c0 mov %eax,-0x40(%ebp)
|
|
393: 89 d8 mov %ebx,%eax
|
|
395: 8d 5b 01 lea 0x1(%ebx),%ebx
|
|
}
|
|
while ((x /= base) != 0);
|
|
398: 8b 4d c0 mov -0x40(%ebp),%ecx
|
|
buf[i++] = digits[x % base];
|
|
39b: 88 14 1e mov %dl,(%esi,%ebx,1)
|
|
while ((x /= base) != 0);
|
|
39e: 39 7d c4 cmp %edi,-0x3c(%ebp)
|
|
3a1: 76 dd jbe 380 <printint+0x30>
|
|
if (neg) {
|
|
3a3: 8b 4d bc mov -0x44(%ebp),%ecx
|
|
3a6: 85 c9 test %ecx,%ecx
|
|
3a8: 74 0c je 3b6 <printint+0x66>
|
|
buf[i++] = '-';
|
|
3aa: c6 44 1d d8 2d movb $0x2d,-0x28(%ebp,%ebx,1)
|
|
buf[i++] = digits[x % base];
|
|
3af: 89 d8 mov %ebx,%eax
|
|
buf[i++] = '-';
|
|
3b1: ba 2d 00 00 00 mov $0x2d,%edx
|
|
}
|
|
|
|
while (--i >= 0) {
|
|
3b6: 8b 7d b8 mov -0x48(%ebp),%edi
|
|
3b9: 8d 5c 05 d7 lea -0x29(%ebp,%eax,1),%ebx
|
|
3bd: eb 07 jmp 3c6 <printint+0x76>
|
|
3bf: 90 nop
|
|
putc(fd, buf[i]);
|
|
3c0: 0f b6 13 movzbl (%ebx),%edx
|
|
3c3: 83 eb 01 sub $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
3c6: 83 ec 04 sub $0x4,%esp
|
|
3c9: 88 55 d7 mov %dl,-0x29(%ebp)
|
|
3cc: 6a 01 push $0x1
|
|
3ce: 56 push %esi
|
|
3cf: 57 push %edi
|
|
3d0: e8 1e ff ff ff call 2f3 <write>
|
|
while (--i >= 0) {
|
|
3d5: 83 c4 10 add $0x10,%esp
|
|
3d8: 39 de cmp %ebx,%esi
|
|
3da: 75 e4 jne 3c0 <printint+0x70>
|
|
}
|
|
}
|
|
3dc: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
3df: 5b pop %ebx
|
|
3e0: 5e pop %esi
|
|
3e1: 5f pop %edi
|
|
3e2: 5d pop %ebp
|
|
3e3: c3 ret
|
|
3e4: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
neg = 0;
|
|
3e8: c7 45 bc 00 00 00 00 movl $0x0,-0x44(%ebp)
|
|
3ef: eb 87 jmp 378 <printint+0x28>
|
|
3f1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
3f8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
3ff: 90 nop
|
|
|
|
00000400 <printf>:
|
|
|
|
// Print to the given fd. Only understands %d, %x, %p, %s.
|
|
void printf(int fd, const char *fmt, ...) {
|
|
400: 55 push %ebp
|
|
401: 89 e5 mov %esp,%ebp
|
|
403: 57 push %edi
|
|
404: 56 push %esi
|
|
405: 53 push %ebx
|
|
406: 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++) {
|
|
409: 8b 5d 0c mov 0xc(%ebp),%ebx
|
|
void printf(int fd, const char *fmt, ...) {
|
|
40c: 8b 75 08 mov 0x8(%ebp),%esi
|
|
for (i = 0; fmt[i]; i++) {
|
|
40f: 0f b6 13 movzbl (%ebx),%edx
|
|
412: 84 d2 test %dl,%dl
|
|
414: 74 6a je 480 <printf+0x80>
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
416: 8d 45 10 lea 0x10(%ebp),%eax
|
|
419: 83 c3 01 add $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
41c: 8d 7d e7 lea -0x19(%ebp),%edi
|
|
state = 0;
|
|
41f: 31 c9 xor %ecx,%ecx
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
421: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
424: eb 36 jmp 45c <printf+0x5c>
|
|
426: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
42d: 8d 76 00 lea 0x0(%esi),%esi
|
|
430: 89 4d d4 mov %ecx,-0x2c(%ebp)
|
|
c = fmt[i] & 0xff;
|
|
if (state == 0) {
|
|
if (c == '%') {
|
|
state = '%';
|
|
433: b9 25 00 00 00 mov $0x25,%ecx
|
|
if (c == '%') {
|
|
438: 83 f8 25 cmp $0x25,%eax
|
|
43b: 74 15 je 452 <printf+0x52>
|
|
write(fd, &c, 1);
|
|
43d: 83 ec 04 sub $0x4,%esp
|
|
440: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
443: 6a 01 push $0x1
|
|
445: 57 push %edi
|
|
446: 56 push %esi
|
|
447: e8 a7 fe ff ff call 2f3 <write>
|
|
44c: 8b 4d d4 mov -0x2c(%ebp),%ecx
|
|
}
|
|
else {
|
|
putc(fd, c);
|
|
44f: 83 c4 10 add $0x10,%esp
|
|
for (i = 0; fmt[i]; i++) {
|
|
452: 0f b6 13 movzbl (%ebx),%edx
|
|
455: 83 c3 01 add $0x1,%ebx
|
|
458: 84 d2 test %dl,%dl
|
|
45a: 74 24 je 480 <printf+0x80>
|
|
c = fmt[i] & 0xff;
|
|
45c: 0f b6 c2 movzbl %dl,%eax
|
|
if (state == 0) {
|
|
45f: 85 c9 test %ecx,%ecx
|
|
461: 74 cd je 430 <printf+0x30>
|
|
}
|
|
}
|
|
else if (state == '%') {
|
|
463: 83 f9 25 cmp $0x25,%ecx
|
|
466: 75 ea jne 452 <printf+0x52>
|
|
if (c == 'd') {
|
|
468: 83 f8 25 cmp $0x25,%eax
|
|
46b: 0f 84 07 01 00 00 je 578 <printf+0x178>
|
|
471: 83 e8 63 sub $0x63,%eax
|
|
474: 83 f8 15 cmp $0x15,%eax
|
|
477: 77 17 ja 490 <printf+0x90>
|
|
479: ff 24 85 30 07 00 00 jmp *0x730(,%eax,4)
|
|
putc(fd, c);
|
|
}
|
|
state = 0;
|
|
}
|
|
}
|
|
}
|
|
480: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
483: 5b pop %ebx
|
|
484: 5e pop %esi
|
|
485: 5f pop %edi
|
|
486: 5d pop %ebp
|
|
487: c3 ret
|
|
488: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
48f: 90 nop
|
|
write(fd, &c, 1);
|
|
490: 83 ec 04 sub $0x4,%esp
|
|
493: 88 55 d4 mov %dl,-0x2c(%ebp)
|
|
496: 6a 01 push $0x1
|
|
498: 57 push %edi
|
|
499: 56 push %esi
|
|
49a: c6 45 e7 25 movb $0x25,-0x19(%ebp)
|
|
49e: e8 50 fe ff ff call 2f3 <write>
|
|
putc(fd, c);
|
|
4a3: 0f b6 55 d4 movzbl -0x2c(%ebp),%edx
|
|
write(fd, &c, 1);
|
|
4a7: 83 c4 0c add $0xc,%esp
|
|
4aa: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
4ad: 6a 01 push $0x1
|
|
4af: 57 push %edi
|
|
4b0: 56 push %esi
|
|
4b1: e8 3d fe ff ff call 2f3 <write>
|
|
putc(fd, c);
|
|
4b6: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
4b9: 31 c9 xor %ecx,%ecx
|
|
4bb: eb 95 jmp 452 <printf+0x52>
|
|
4bd: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 16, 0);
|
|
4c0: 83 ec 0c sub $0xc,%esp
|
|
4c3: b9 10 00 00 00 mov $0x10,%ecx
|
|
4c8: 6a 00 push $0x0
|
|
4ca: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
4cd: 8b 10 mov (%eax),%edx
|
|
4cf: 89 f0 mov %esi,%eax
|
|
4d1: e8 7a fe ff ff call 350 <printint>
|
|
ap++;
|
|
4d6: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
4da: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
4dd: 31 c9 xor %ecx,%ecx
|
|
4df: e9 6e ff ff ff jmp 452 <printf+0x52>
|
|
4e4: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
s = (char*)*ap;
|
|
4e8: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
4eb: 8b 10 mov (%eax),%edx
|
|
ap++;
|
|
4ed: 83 c0 04 add $0x4,%eax
|
|
4f0: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
if (s == 0) {
|
|
4f3: 85 d2 test %edx,%edx
|
|
4f5: 0f 84 8d 00 00 00 je 588 <printf+0x188>
|
|
while (*s != 0) {
|
|
4fb: 0f b6 02 movzbl (%edx),%eax
|
|
state = 0;
|
|
4fe: 31 c9 xor %ecx,%ecx
|
|
while (*s != 0) {
|
|
500: 84 c0 test %al,%al
|
|
502: 0f 84 4a ff ff ff je 452 <printf+0x52>
|
|
508: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
50b: 89 d3 mov %edx,%ebx
|
|
50d: 8d 76 00 lea 0x0(%esi),%esi
|
|
write(fd, &c, 1);
|
|
510: 83 ec 04 sub $0x4,%esp
|
|
s++;
|
|
513: 83 c3 01 add $0x1,%ebx
|
|
516: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
519: 6a 01 push $0x1
|
|
51b: 57 push %edi
|
|
51c: 56 push %esi
|
|
51d: e8 d1 fd ff ff call 2f3 <write>
|
|
while (*s != 0) {
|
|
522: 0f b6 03 movzbl (%ebx),%eax
|
|
525: 83 c4 10 add $0x10,%esp
|
|
528: 84 c0 test %al,%al
|
|
52a: 75 e4 jne 510 <printf+0x110>
|
|
state = 0;
|
|
52c: 8b 5d d4 mov -0x2c(%ebp),%ebx
|
|
52f: 31 c9 xor %ecx,%ecx
|
|
531: e9 1c ff ff ff jmp 452 <printf+0x52>
|
|
536: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
53d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 10, 1);
|
|
540: 83 ec 0c sub $0xc,%esp
|
|
543: b9 0a 00 00 00 mov $0xa,%ecx
|
|
548: 6a 01 push $0x1
|
|
54a: e9 7b ff ff ff jmp 4ca <printf+0xca>
|
|
54f: 90 nop
|
|
putc(fd, *ap);
|
|
550: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
write(fd, &c, 1);
|
|
553: 83 ec 04 sub $0x4,%esp
|
|
putc(fd, *ap);
|
|
556: 8b 00 mov (%eax),%eax
|
|
write(fd, &c, 1);
|
|
558: 6a 01 push $0x1
|
|
55a: 57 push %edi
|
|
55b: 56 push %esi
|
|
putc(fd, *ap);
|
|
55c: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
55f: e8 8f fd ff ff call 2f3 <write>
|
|
ap++;
|
|
564: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
568: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
56b: 31 c9 xor %ecx,%ecx
|
|
56d: e9 e0 fe ff ff jmp 452 <printf+0x52>
|
|
572: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
putc(fd, c);
|
|
578: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
57b: 83 ec 04 sub $0x4,%esp
|
|
57e: e9 2a ff ff ff jmp 4ad <printf+0xad>
|
|
583: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
587: 90 nop
|
|
s = "(null)";
|
|
588: ba 28 07 00 00 mov $0x728,%edx
|
|
while (*s != 0) {
|
|
58d: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
590: b8 28 00 00 00 mov $0x28,%eax
|
|
595: 89 d3 mov %edx,%ebx
|
|
597: e9 74 ff ff ff jmp 510 <printf+0x110>
|
|
59c: 66 90 xchg %ax,%ax
|
|
59e: 66 90 xchg %ax,%ax
|
|
|
|
000005a0 <free>:
|
|
typedef union header Header;
|
|
|
|
static Header base;
|
|
static Header *freep;
|
|
|
|
void free(void *ap) {
|
|
5a0: 55 push %ebp
|
|
Header *bp, *p;
|
|
|
|
bp = (Header*)ap - 1;
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
5a1: a1 30 0a 00 00 mov 0xa30,%eax
|
|
void free(void *ap) {
|
|
5a6: 89 e5 mov %esp,%ebp
|
|
5a8: 57 push %edi
|
|
5a9: 56 push %esi
|
|
5aa: 53 push %ebx
|
|
5ab: 8b 5d 08 mov 0x8(%ebp),%ebx
|
|
bp = (Header*)ap - 1;
|
|
5ae: 8d 4b f8 lea -0x8(%ebx),%ecx
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
5b1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
5b8: 89 c2 mov %eax,%edx
|
|
5ba: 8b 00 mov (%eax),%eax
|
|
5bc: 39 ca cmp %ecx,%edx
|
|
5be: 73 30 jae 5f0 <free+0x50>
|
|
5c0: 39 c1 cmp %eax,%ecx
|
|
5c2: 72 04 jb 5c8 <free+0x28>
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
5c4: 39 c2 cmp %eax,%edx
|
|
5c6: 72 f0 jb 5b8 <free+0x18>
|
|
break;
|
|
}
|
|
}
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
5c8: 8b 73 fc mov -0x4(%ebx),%esi
|
|
5cb: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
5ce: 39 f8 cmp %edi,%eax
|
|
5d0: 74 30 je 602 <free+0x62>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
5d2: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
}
|
|
else {
|
|
bp->s.ptr = p->s.ptr;
|
|
}
|
|
if (p + p->s.size == bp) {
|
|
5d5: 8b 42 04 mov 0x4(%edx),%eax
|
|
5d8: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
5db: 39 f1 cmp %esi,%ecx
|
|
5dd: 74 3a je 619 <free+0x79>
|
|
p->s.size += bp->s.size;
|
|
p->s.ptr = bp->s.ptr;
|
|
5df: 89 0a mov %ecx,(%edx)
|
|
}
|
|
else {
|
|
p->s.ptr = bp;
|
|
}
|
|
freep = p;
|
|
}
|
|
5e1: 5b pop %ebx
|
|
freep = p;
|
|
5e2: 89 15 30 0a 00 00 mov %edx,0xa30
|
|
}
|
|
5e8: 5e pop %esi
|
|
5e9: 5f pop %edi
|
|
5ea: 5d pop %ebp
|
|
5eb: c3 ret
|
|
5ec: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
5f0: 39 c2 cmp %eax,%edx
|
|
5f2: 72 c4 jb 5b8 <free+0x18>
|
|
5f4: 39 c1 cmp %eax,%ecx
|
|
5f6: 73 c0 jae 5b8 <free+0x18>
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
5f8: 8b 73 fc mov -0x4(%ebx),%esi
|
|
5fb: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
5fe: 39 f8 cmp %edi,%eax
|
|
600: 75 d0 jne 5d2 <free+0x32>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
602: 03 70 04 add 0x4(%eax),%esi
|
|
605: 89 73 fc mov %esi,-0x4(%ebx)
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
608: 8b 02 mov (%edx),%eax
|
|
60a: 8b 00 mov (%eax),%eax
|
|
60c: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
if (p + p->s.size == bp) {
|
|
60f: 8b 42 04 mov 0x4(%edx),%eax
|
|
612: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
615: 39 f1 cmp %esi,%ecx
|
|
617: 75 c6 jne 5df <free+0x3f>
|
|
p->s.size += bp->s.size;
|
|
619: 03 43 fc add -0x4(%ebx),%eax
|
|
freep = p;
|
|
61c: 89 15 30 0a 00 00 mov %edx,0xa30
|
|
p->s.size += bp->s.size;
|
|
622: 89 42 04 mov %eax,0x4(%edx)
|
|
p->s.ptr = bp->s.ptr;
|
|
625: 8b 4b f8 mov -0x8(%ebx),%ecx
|
|
628: 89 0a mov %ecx,(%edx)
|
|
}
|
|
62a: 5b pop %ebx
|
|
62b: 5e pop %esi
|
|
62c: 5f pop %edi
|
|
62d: 5d pop %ebp
|
|
62e: c3 ret
|
|
62f: 90 nop
|
|
|
|
00000630 <malloc>:
|
|
hp->s.size = nu;
|
|
free((void*)(hp + 1));
|
|
return freep;
|
|
}
|
|
|
|
void* malloc(uint nbytes) {
|
|
630: 55 push %ebp
|
|
631: 89 e5 mov %esp,%ebp
|
|
633: 57 push %edi
|
|
634: 56 push %esi
|
|
635: 53 push %ebx
|
|
636: 83 ec 1c sub $0x1c,%esp
|
|
Header *p, *prevp;
|
|
uint nunits;
|
|
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
639: 8b 45 08 mov 0x8(%ebp),%eax
|
|
if ((prevp = freep) == 0) {
|
|
63c: 8b 3d 30 0a 00 00 mov 0xa30,%edi
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
642: 8d 70 07 lea 0x7(%eax),%esi
|
|
645: c1 ee 03 shr $0x3,%esi
|
|
648: 83 c6 01 add $0x1,%esi
|
|
if ((prevp = freep) == 0) {
|
|
64b: 85 ff test %edi,%edi
|
|
64d: 0f 84 9d 00 00 00 je 6f0 <malloc+0xc0>
|
|
base.s.ptr = freep = prevp = &base;
|
|
base.s.size = 0;
|
|
}
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
653: 8b 17 mov (%edi),%edx
|
|
if (p->s.size >= nunits) {
|
|
655: 8b 4a 04 mov 0x4(%edx),%ecx
|
|
658: 39 f1 cmp %esi,%ecx
|
|
65a: 73 6a jae 6c6 <malloc+0x96>
|
|
65c: bb 00 10 00 00 mov $0x1000,%ebx
|
|
661: 39 de cmp %ebx,%esi
|
|
663: 0f 43 de cmovae %esi,%ebx
|
|
p = sbrk(nu * sizeof(Header));
|
|
666: 8d 04 dd 00 00 00 00 lea 0x0(,%ebx,8),%eax
|
|
66d: 89 45 e4 mov %eax,-0x1c(%ebp)
|
|
670: eb 17 jmp 689 <malloc+0x59>
|
|
672: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
678: 8b 02 mov (%edx),%eax
|
|
if (p->s.size >= nunits) {
|
|
67a: 8b 48 04 mov 0x4(%eax),%ecx
|
|
67d: 39 f1 cmp %esi,%ecx
|
|
67f: 73 4f jae 6d0 <malloc+0xa0>
|
|
p->s.size = nunits;
|
|
}
|
|
freep = prevp;
|
|
return (void*)(p + 1);
|
|
}
|
|
if (p == freep) {
|
|
681: 8b 3d 30 0a 00 00 mov 0xa30,%edi
|
|
687: 89 c2 mov %eax,%edx
|
|
689: 39 d7 cmp %edx,%edi
|
|
68b: 75 eb jne 678 <malloc+0x48>
|
|
p = sbrk(nu * sizeof(Header));
|
|
68d: 83 ec 0c sub $0xc,%esp
|
|
690: ff 75 e4 push -0x1c(%ebp)
|
|
693: e8 3b fc ff ff call 2d3 <sbrk>
|
|
if (p == (char*)-1) {
|
|
698: 83 c4 10 add $0x10,%esp
|
|
69b: 83 f8 ff cmp $0xffffffff,%eax
|
|
69e: 74 1c je 6bc <malloc+0x8c>
|
|
hp->s.size = nu;
|
|
6a0: 89 58 04 mov %ebx,0x4(%eax)
|
|
free((void*)(hp + 1));
|
|
6a3: 83 ec 0c sub $0xc,%esp
|
|
6a6: 83 c0 08 add $0x8,%eax
|
|
6a9: 50 push %eax
|
|
6aa: e8 f1 fe ff ff call 5a0 <free>
|
|
return freep;
|
|
6af: 8b 15 30 0a 00 00 mov 0xa30,%edx
|
|
if ((p = morecore(nunits)) == 0) {
|
|
6b5: 83 c4 10 add $0x10,%esp
|
|
6b8: 85 d2 test %edx,%edx
|
|
6ba: 75 bc jne 678 <malloc+0x48>
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
6bc: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return 0;
|
|
6bf: 31 c0 xor %eax,%eax
|
|
}
|
|
6c1: 5b pop %ebx
|
|
6c2: 5e pop %esi
|
|
6c3: 5f pop %edi
|
|
6c4: 5d pop %ebp
|
|
6c5: c3 ret
|
|
if (p->s.size >= nunits) {
|
|
6c6: 89 d0 mov %edx,%eax
|
|
6c8: 89 fa mov %edi,%edx
|
|
6ca: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
if (p->s.size == nunits) {
|
|
6d0: 39 ce cmp %ecx,%esi
|
|
6d2: 74 4c je 720 <malloc+0xf0>
|
|
p->s.size -= nunits;
|
|
6d4: 29 f1 sub %esi,%ecx
|
|
6d6: 89 48 04 mov %ecx,0x4(%eax)
|
|
p += p->s.size;
|
|
6d9: 8d 04 c8 lea (%eax,%ecx,8),%eax
|
|
p->s.size = nunits;
|
|
6dc: 89 70 04 mov %esi,0x4(%eax)
|
|
freep = prevp;
|
|
6df: 89 15 30 0a 00 00 mov %edx,0xa30
|
|
}
|
|
6e5: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return (void*)(p + 1);
|
|
6e8: 83 c0 08 add $0x8,%eax
|
|
}
|
|
6eb: 5b pop %ebx
|
|
6ec: 5e pop %esi
|
|
6ed: 5f pop %edi
|
|
6ee: 5d pop %ebp
|
|
6ef: c3 ret
|
|
base.s.ptr = freep = prevp = &base;
|
|
6f0: c7 05 30 0a 00 00 34 movl $0xa34,0xa30
|
|
6f7: 0a 00 00
|
|
base.s.size = 0;
|
|
6fa: bf 34 0a 00 00 mov $0xa34,%edi
|
|
base.s.ptr = freep = prevp = &base;
|
|
6ff: c7 05 34 0a 00 00 34 movl $0xa34,0xa34
|
|
706: 0a 00 00
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
709: 89 fa mov %edi,%edx
|
|
base.s.size = 0;
|
|
70b: c7 05 38 0a 00 00 00 movl $0x0,0xa38
|
|
712: 00 00 00
|
|
if (p->s.size >= nunits) {
|
|
715: e9 42 ff ff ff jmp 65c <malloc+0x2c>
|
|
71a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
prevp->s.ptr = p->s.ptr;
|
|
720: 8b 08 mov (%eax),%ecx
|
|
722: 89 0a mov %ecx,(%edx)
|
|
724: eb b9 jmp 6df <malloc+0xaf>
|