Files
xv6-custom-os/argtest.asm
2022-12-06 11:49:47 +00:00

1163 lines
40 KiB
NASM

_argtest: file format elf32-i386
Disassembly of section .text:
00000000 <main>:
#include "types.h"
#include "user.h"
int main(int argc, char *argv[]) {
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: 57 push %edi
e: 56 push %esi
f: 53 push %ebx
10: 51 push %ecx
11: 83 ec 08 sub $0x8,%esp
14: 8b 31 mov (%ecx),%esi
16: 8b 79 04 mov 0x4(%ecx),%edi
for (int i = 1; i < argc; i++) {
19: 83 fe 01 cmp $0x1,%esi
1c: 7e 24 jle 42 <main+0x42>
1e: bb 01 00 00 00 mov $0x1,%ebx
23: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
27: 90 nop
printf(1, "Arg %d: %s\n", i, argv[i]);
28: ff 34 9f push (%edi,%ebx,4)
2b: 53 push %ebx
for (int i = 1; i < argc; i++) {
2c: 83 c3 01 add $0x1,%ebx
printf(1, "Arg %d: %s\n", i, argv[i]);
2f: 68 38 07 00 00 push $0x738
34: 6a 01 push $0x1
36: e8 d5 03 00 00 call 410 <printf>
for (int i = 1; i < argc; i++) {
3b: 83 c4 10 add $0x10,%esp
3e: 39 de cmp %ebx,%esi
40: 75 e6 jne 28 <main+0x28>
}
exit();
42: e8 5c 02 00 00 call 2a3 <exit>
47: 66 90 xchg %ax,%ax
49: 66 90 xchg %ax,%ax
4b: 66 90 xchg %ax,%ax
4d: 66 90 xchg %ax,%ax
4f: 90 nop
00000050 <strcpy>:
#include "stat.h"
#include "fcntl.h"
#include "user.h"
#include "x86.h"
char*strcpy(char *s, const char *t) {
50: 55 push %ebp
char *os;
os = s;
while ((*s++ = *t++) != 0) {
51: 31 c0 xor %eax,%eax
char*strcpy(char *s, const char *t) {
53: 89 e5 mov %esp,%ebp
55: 53 push %ebx
56: 8b 4d 08 mov 0x8(%ebp),%ecx
59: 8b 5d 0c mov 0xc(%ebp),%ebx
5c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
while ((*s++ = *t++) != 0) {
60: 0f b6 14 03 movzbl (%ebx,%eax,1),%edx
64: 88 14 01 mov %dl,(%ecx,%eax,1)
67: 83 c0 01 add $0x1,%eax
6a: 84 d2 test %dl,%dl
6c: 75 f2 jne 60 <strcpy+0x10>
;
}
return os;
}
6e: 8b 5d fc mov -0x4(%ebp),%ebx
71: 89 c8 mov %ecx,%eax
73: c9 leave
74: c3 ret
75: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
7c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
00000080 <strcmp>:
int strcmp(const char *p, const char *q) {
80: 55 push %ebp
81: 89 e5 mov %esp,%ebp
83: 53 push %ebx
84: 8b 55 08 mov 0x8(%ebp),%edx
87: 8b 4d 0c mov 0xc(%ebp),%ecx
while (*p && *p == *q) {
8a: 0f b6 02 movzbl (%edx),%eax
8d: 84 c0 test %al,%al
8f: 75 17 jne a8 <strcmp+0x28>
91: eb 3a jmp cd <strcmp+0x4d>
93: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
97: 90 nop
98: 0f b6 42 01 movzbl 0x1(%edx),%eax
p++, q++;
9c: 83 c2 01 add $0x1,%edx
9f: 8d 59 01 lea 0x1(%ecx),%ebx
while (*p && *p == *q) {
a2: 84 c0 test %al,%al
a4: 74 1a je c0 <strcmp+0x40>
p++, q++;
a6: 89 d9 mov %ebx,%ecx
while (*p && *p == *q) {
a8: 0f b6 19 movzbl (%ecx),%ebx
ab: 38 c3 cmp %al,%bl
ad: 74 e9 je 98 <strcmp+0x18>
}
return (uchar) * p - (uchar) * q;
af: 29 d8 sub %ebx,%eax
}
b1: 8b 5d fc mov -0x4(%ebp),%ebx
b4: c9 leave
b5: c3 ret
b6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
bd: 8d 76 00 lea 0x0(%esi),%esi
return (uchar) * p - (uchar) * q;
c0: 0f b6 59 01 movzbl 0x1(%ecx),%ebx
c4: 31 c0 xor %eax,%eax
c6: 29 d8 sub %ebx,%eax
}
c8: 8b 5d fc mov -0x4(%ebp),%ebx
cb: c9 leave
cc: c3 ret
return (uchar) * p - (uchar) * q;
cd: 0f b6 19 movzbl (%ecx),%ebx
d0: 31 c0 xor %eax,%eax
d2: eb db jmp af <strcmp+0x2f>
d4: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
db: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
df: 90 nop
000000e0 <strlen>:
uint strlen(const char *s) {
e0: 55 push %ebp
e1: 89 e5 mov %esp,%ebp
e3: 8b 55 08 mov 0x8(%ebp),%edx
int n;
for (n = 0; s[n]; n++) {
e6: 80 3a 00 cmpb $0x0,(%edx)
e9: 74 15 je 100 <strlen+0x20>
eb: 31 c0 xor %eax,%eax
ed: 8d 76 00 lea 0x0(%esi),%esi
f0: 83 c0 01 add $0x1,%eax
f3: 80 3c 02 00 cmpb $0x0,(%edx,%eax,1)
f7: 89 c1 mov %eax,%ecx
f9: 75 f5 jne f0 <strlen+0x10>
;
}
return n;
}
fb: 89 c8 mov %ecx,%eax
fd: 5d pop %ebp
fe: c3 ret
ff: 90 nop
for (n = 0; s[n]; n++) {
100: 31 c9 xor %ecx,%ecx
}
102: 5d pop %ebp
103: 89 c8 mov %ecx,%eax
105: c3 ret
106: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
10d: 8d 76 00 lea 0x0(%esi),%esi
00000110 <memset>:
void* memset(void *dst, int c, uint n) {
110: 55 push %ebp
111: 89 e5 mov %esp,%ebp
113: 57 push %edi
114: 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" :
117: 8b 4d 10 mov 0x10(%ebp),%ecx
11a: 8b 45 0c mov 0xc(%ebp),%eax
11d: 89 d7 mov %edx,%edi
11f: fc cld
120: f3 aa rep stos %al,%es:(%edi)
stosb(dst, c, n);
return dst;
}
122: 8b 7d fc mov -0x4(%ebp),%edi
125: 89 d0 mov %edx,%eax
127: c9 leave
128: c3 ret
129: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
00000130 <strchr>:
char* strchr(const char *s, char c) {
130: 55 push %ebp
131: 89 e5 mov %esp,%ebp
133: 8b 45 08 mov 0x8(%ebp),%eax
136: 0f b6 4d 0c movzbl 0xc(%ebp),%ecx
for (; *s; s++) {
13a: 0f b6 10 movzbl (%eax),%edx
13d: 84 d2 test %dl,%dl
13f: 75 12 jne 153 <strchr+0x23>
141: eb 1d jmp 160 <strchr+0x30>
143: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
147: 90 nop
148: 0f b6 50 01 movzbl 0x1(%eax),%edx
14c: 83 c0 01 add $0x1,%eax
14f: 84 d2 test %dl,%dl
151: 74 0d je 160 <strchr+0x30>
if (*s == c) {
153: 38 d1 cmp %dl,%cl
155: 75 f1 jne 148 <strchr+0x18>
return (char*)s;
}
}
return 0;
}
157: 5d pop %ebp
158: c3 ret
159: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
return 0;
160: 31 c0 xor %eax,%eax
}
162: 5d pop %ebp
163: c3 ret
164: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
16b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
16f: 90 nop
00000170 <gets>:
char* gets(char *buf, int max) {
170: 55 push %ebp
171: 89 e5 mov %esp,%ebp
173: 57 push %edi
174: 56 push %esi
int i, cc;
char c;
for (i = 0; i + 1 < max;) {
cc = read(0, &c, 1);
175: 8d 7d e7 lea -0x19(%ebp),%edi
char* gets(char *buf, int max) {
178: 53 push %ebx
for (i = 0; i + 1 < max;) {
179: 31 db xor %ebx,%ebx
char* gets(char *buf, int max) {
17b: 83 ec 1c sub $0x1c,%esp
for (i = 0; i + 1 < max;) {
17e: eb 27 jmp 1a7 <gets+0x37>
cc = read(0, &c, 1);
180: 83 ec 04 sub $0x4,%esp
183: 6a 01 push $0x1
185: 57 push %edi
186: 6a 00 push $0x0
188: e8 2e 01 00 00 call 2bb <read>
if (cc < 1) {
18d: 83 c4 10 add $0x10,%esp
190: 85 c0 test %eax,%eax
192: 7e 1d jle 1b1 <gets+0x41>
break;
}
buf[i++] = c;
194: 0f b6 45 e7 movzbl -0x19(%ebp),%eax
198: 8b 55 08 mov 0x8(%ebp),%edx
19b: 88 44 1a ff mov %al,-0x1(%edx,%ebx,1)
if (c == '\n' || c == '\r') {
19f: 3c 0a cmp $0xa,%al
1a1: 74 1d je 1c0 <gets+0x50>
1a3: 3c 0d cmp $0xd,%al
1a5: 74 19 je 1c0 <gets+0x50>
for (i = 0; i + 1 < max;) {
1a7: 89 de mov %ebx,%esi
1a9: 83 c3 01 add $0x1,%ebx
1ac: 3b 5d 0c cmp 0xc(%ebp),%ebx
1af: 7c cf jl 180 <gets+0x10>
break;
}
}
buf[i] = '\0';
1b1: 8b 45 08 mov 0x8(%ebp),%eax
1b4: c6 04 30 00 movb $0x0,(%eax,%esi,1)
return buf;
}
1b8: 8d 65 f4 lea -0xc(%ebp),%esp
1bb: 5b pop %ebx
1bc: 5e pop %esi
1bd: 5f pop %edi
1be: 5d pop %ebp
1bf: c3 ret
buf[i] = '\0';
1c0: 8b 45 08 mov 0x8(%ebp),%eax
1c3: 89 de mov %ebx,%esi
1c5: c6 04 30 00 movb $0x0,(%eax,%esi,1)
}
1c9: 8d 65 f4 lea -0xc(%ebp),%esp
1cc: 5b pop %ebx
1cd: 5e pop %esi
1ce: 5f pop %edi
1cf: 5d pop %ebp
1d0: c3 ret
1d1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
1d8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
1df: 90 nop
000001e0 <stat>:
int stat(const char *n, struct stat *st) {
1e0: 55 push %ebp
1e1: 89 e5 mov %esp,%ebp
1e3: 56 push %esi
1e4: 53 push %ebx
int fd;
int r;
fd = open(n, O_RDONLY);
1e5: 83 ec 08 sub $0x8,%esp
1e8: 6a 00 push $0x0
1ea: ff 75 08 push 0x8(%ebp)
1ed: e8 19 01 00 00 call 30b <open>
if (fd < 0) {
1f2: 83 c4 10 add $0x10,%esp
1f5: 85 c0 test %eax,%eax
1f7: 78 27 js 220 <stat+0x40>
return -1;
}
r = fstat(fd, st);
1f9: 83 ec 08 sub $0x8,%esp
1fc: ff 75 0c push 0xc(%ebp)
1ff: 89 c3 mov %eax,%ebx
201: 50 push %eax
202: e8 cc 00 00 00 call 2d3 <fstat>
close(fd);
207: 89 1c 24 mov %ebx,(%esp)
r = fstat(fd, st);
20a: 89 c6 mov %eax,%esi
close(fd);
20c: e8 2a 01 00 00 call 33b <close>
return r;
211: 83 c4 10 add $0x10,%esp
}
214: 8d 65 f8 lea -0x8(%ebp),%esp
217: 89 f0 mov %esi,%eax
219: 5b pop %ebx
21a: 5e pop %esi
21b: 5d pop %ebp
21c: c3 ret
21d: 8d 76 00 lea 0x0(%esi),%esi
return -1;
220: be ff ff ff ff mov $0xffffffff,%esi
225: eb ed jmp 214 <stat+0x34>
227: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
22e: 66 90 xchg %ax,%ax
00000230 <atoi>:
int atoi(const char *s) {
230: 55 push %ebp
231: 89 e5 mov %esp,%ebp
233: 53 push %ebx
234: 8b 55 08 mov 0x8(%ebp),%edx
int n;
n = 0;
while ('0' <= *s && *s <= '9') {
237: 0f be 02 movsbl (%edx),%eax
23a: 8d 48 d0 lea -0x30(%eax),%ecx
23d: 80 f9 09 cmp $0x9,%cl
n = 0;
240: b9 00 00 00 00 mov $0x0,%ecx
while ('0' <= *s && *s <= '9') {
245: 77 1e ja 265 <atoi+0x35>
247: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
24e: 66 90 xchg %ax,%ax
n = n * 10 + *s++ - '0';
250: 83 c2 01 add $0x1,%edx
253: 8d 0c 89 lea (%ecx,%ecx,4),%ecx
256: 8d 4c 48 d0 lea -0x30(%eax,%ecx,2),%ecx
while ('0' <= *s && *s <= '9') {
25a: 0f be 02 movsbl (%edx),%eax
25d: 8d 58 d0 lea -0x30(%eax),%ebx
260: 80 fb 09 cmp $0x9,%bl
263: 76 eb jbe 250 <atoi+0x20>
}
return n;
}
265: 8b 5d fc mov -0x4(%ebp),%ebx
268: 89 c8 mov %ecx,%eax
26a: c9 leave
26b: c3 ret
26c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
00000270 <memmove>:
void* memmove(void *vdst, const void *vsrc, int n) {
270: 55 push %ebp
271: 89 e5 mov %esp,%ebp
273: 57 push %edi
274: 8b 45 10 mov 0x10(%ebp),%eax
277: 8b 55 08 mov 0x8(%ebp),%edx
27a: 56 push %esi
27b: 8b 75 0c mov 0xc(%ebp),%esi
char *dst;
const char *src;
dst = vdst;
src = vsrc;
while (n-- > 0) {
27e: 85 c0 test %eax,%eax
280: 7e 13 jle 295 <memmove+0x25>
282: 01 d0 add %edx,%eax
dst = vdst;
284: 89 d7 mov %edx,%edi
286: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
28d: 8d 76 00 lea 0x0(%esi),%esi
*dst++ = *src++;
290: a4 movsb %ds:(%esi),%es:(%edi)
while (n-- > 0) {
291: 39 f8 cmp %edi,%eax
293: 75 fb jne 290 <memmove+0x20>
}
return vdst;
}
295: 5e pop %esi
296: 89 d0 mov %edx,%eax
298: 5f pop %edi
299: 5d pop %ebp
29a: c3 ret
0000029b <fork>:
name: \
movl $SYS_ ## name, %eax; \
int $T_SYSCALL; \
ret
SYSCALL(fork)
29b: b8 01 00 00 00 mov $0x1,%eax
2a0: cd 40 int $0x40
2a2: c3 ret
000002a3 <exit>:
SYSCALL(exit)
2a3: b8 02 00 00 00 mov $0x2,%eax
2a8: cd 40 int $0x40
2aa: c3 ret
000002ab <wait>:
SYSCALL(wait)
2ab: b8 03 00 00 00 mov $0x3,%eax
2b0: cd 40 int $0x40
2b2: c3 ret
000002b3 <pipe>:
SYSCALL(pipe)
2b3: b8 04 00 00 00 mov $0x4,%eax
2b8: cd 40 int $0x40
2ba: c3 ret
000002bb <read>:
SYSCALL(read)
2bb: b8 05 00 00 00 mov $0x5,%eax
2c0: cd 40 int $0x40
2c2: c3 ret
000002c3 <kill>:
SYSCALL(kill)
2c3: b8 06 00 00 00 mov $0x6,%eax
2c8: cd 40 int $0x40
2ca: c3 ret
000002cb <exec>:
SYSCALL(exec)
2cb: b8 07 00 00 00 mov $0x7,%eax
2d0: cd 40 int $0x40
2d2: c3 ret
000002d3 <fstat>:
SYSCALL(fstat)
2d3: b8 08 00 00 00 mov $0x8,%eax
2d8: cd 40 int $0x40
2da: c3 ret
000002db <chdir>:
SYSCALL(chdir)
2db: b8 09 00 00 00 mov $0x9,%eax
2e0: cd 40 int $0x40
2e2: c3 ret
000002e3 <dup>:
SYSCALL(dup)
2e3: b8 0a 00 00 00 mov $0xa,%eax
2e8: cd 40 int $0x40
2ea: c3 ret
000002eb <getpid>:
SYSCALL(getpid)
2eb: b8 0b 00 00 00 mov $0xb,%eax
2f0: cd 40 int $0x40
2f2: c3 ret
000002f3 <sbrk>:
SYSCALL(sbrk)
2f3: b8 0c 00 00 00 mov $0xc,%eax
2f8: cd 40 int $0x40
2fa: c3 ret
000002fb <sleep>:
SYSCALL(sleep)
2fb: b8 0d 00 00 00 mov $0xd,%eax
300: cd 40 int $0x40
302: c3 ret
00000303 <uptime>:
SYSCALL(uptime)
303: b8 0e 00 00 00 mov $0xe,%eax
308: cd 40 int $0x40
30a: c3 ret
0000030b <open>:
SYSCALL(open)
30b: b8 0f 00 00 00 mov $0xf,%eax
310: cd 40 int $0x40
312: c3 ret
00000313 <write>:
SYSCALL(write)
313: b8 10 00 00 00 mov $0x10,%eax
318: cd 40 int $0x40
31a: c3 ret
0000031b <mknod>:
SYSCALL(mknod)
31b: b8 11 00 00 00 mov $0x11,%eax
320: cd 40 int $0x40
322: c3 ret
00000323 <unlink>:
SYSCALL(unlink)
323: b8 12 00 00 00 mov $0x12,%eax
328: cd 40 int $0x40
32a: c3 ret
0000032b <link>:
SYSCALL(link)
32b: b8 13 00 00 00 mov $0x13,%eax
330: cd 40 int $0x40
332: c3 ret
00000333 <mkdir>:
SYSCALL(mkdir)
333: b8 14 00 00 00 mov $0x14,%eax
338: cd 40 int $0x40
33a: c3 ret
0000033b <close>:
SYSCALL(close)
33b: b8 15 00 00 00 mov $0x15,%eax
340: cd 40 int $0x40
342: c3 ret
00000343 <getch>:
SYSCALL(getch)
343: b8 16 00 00 00 mov $0x16,%eax
348: cd 40 int $0x40
34a: c3 ret
0000034b <greeting>:
SYSCALL(greeting)
34b: b8 17 00 00 00 mov $0x17,%eax
350: cd 40 int $0x40
352: c3 ret
00000353 <shutdown>:
SYSCALL(shutdown)
353: b8 18 00 00 00 mov $0x18,%eax
358: cd 40 int $0x40
35a: c3 ret
35b: 66 90 xchg %ax,%ax
35d: 66 90 xchg %ax,%ax
35f: 90 nop
00000360 <printint>:
static void putc(int fd, char c) {
write(fd, &c, 1);
}
static void printint(int fd, int xx, int base, int sgn) {
360: 55 push %ebp
361: 89 e5 mov %esp,%ebp
363: 57 push %edi
364: 56 push %esi
365: 53 push %ebx
366: 83 ec 3c sub $0x3c,%esp
369: 89 4d c4 mov %ecx,-0x3c(%ebp)
uint x;
neg = 0;
if (sgn && xx < 0) {
neg = 1;
x = -xx;
36c: 89 d1 mov %edx,%ecx
static void printint(int fd, int xx, int base, int sgn) {
36e: 89 45 b8 mov %eax,-0x48(%ebp)
if (sgn && xx < 0) {
371: 85 d2 test %edx,%edx
373: 0f 89 7f 00 00 00 jns 3f8 <printint+0x98>
379: f6 45 08 01 testb $0x1,0x8(%ebp)
37d: 74 79 je 3f8 <printint+0x98>
neg = 1;
37f: c7 45 bc 01 00 00 00 movl $0x1,-0x44(%ebp)
x = -xx;
386: f7 d9 neg %ecx
}
else {
x = xx;
}
i = 0;
388: 31 db xor %ebx,%ebx
38a: 8d 75 d7 lea -0x29(%ebp),%esi
38d: 8d 76 00 lea 0x0(%esi),%esi
do {
buf[i++] = digits[x % base];
390: 89 c8 mov %ecx,%eax
392: 31 d2 xor %edx,%edx
394: 89 cf mov %ecx,%edi
396: f7 75 c4 divl -0x3c(%ebp)
399: 0f b6 92 a4 07 00 00 movzbl 0x7a4(%edx),%edx
3a0: 89 45 c0 mov %eax,-0x40(%ebp)
3a3: 89 d8 mov %ebx,%eax
3a5: 8d 5b 01 lea 0x1(%ebx),%ebx
}
while ((x /= base) != 0);
3a8: 8b 4d c0 mov -0x40(%ebp),%ecx
buf[i++] = digits[x % base];
3ab: 88 14 1e mov %dl,(%esi,%ebx,1)
while ((x /= base) != 0);
3ae: 39 7d c4 cmp %edi,-0x3c(%ebp)
3b1: 76 dd jbe 390 <printint+0x30>
if (neg) {
3b3: 8b 4d bc mov -0x44(%ebp),%ecx
3b6: 85 c9 test %ecx,%ecx
3b8: 74 0c je 3c6 <printint+0x66>
buf[i++] = '-';
3ba: c6 44 1d d8 2d movb $0x2d,-0x28(%ebp,%ebx,1)
buf[i++] = digits[x % base];
3bf: 89 d8 mov %ebx,%eax
buf[i++] = '-';
3c1: ba 2d 00 00 00 mov $0x2d,%edx
}
while (--i >= 0) {
3c6: 8b 7d b8 mov -0x48(%ebp),%edi
3c9: 8d 5c 05 d7 lea -0x29(%ebp,%eax,1),%ebx
3cd: eb 07 jmp 3d6 <printint+0x76>
3cf: 90 nop
putc(fd, buf[i]);
3d0: 0f b6 13 movzbl (%ebx),%edx
3d3: 83 eb 01 sub $0x1,%ebx
write(fd, &c, 1);
3d6: 83 ec 04 sub $0x4,%esp
3d9: 88 55 d7 mov %dl,-0x29(%ebp)
3dc: 6a 01 push $0x1
3de: 56 push %esi
3df: 57 push %edi
3e0: e8 2e ff ff ff call 313 <write>
while (--i >= 0) {
3e5: 83 c4 10 add $0x10,%esp
3e8: 39 de cmp %ebx,%esi
3ea: 75 e4 jne 3d0 <printint+0x70>
}
}
3ec: 8d 65 f4 lea -0xc(%ebp),%esp
3ef: 5b pop %ebx
3f0: 5e pop %esi
3f1: 5f pop %edi
3f2: 5d pop %ebp
3f3: c3 ret
3f4: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
neg = 0;
3f8: c7 45 bc 00 00 00 00 movl $0x0,-0x44(%ebp)
3ff: eb 87 jmp 388 <printint+0x28>
401: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
408: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
40f: 90 nop
00000410 <printf>:
// Print to the given fd. Only understands %d, %x, %p, %s.
void printf(int fd, const char *fmt, ...) {
410: 55 push %ebp
411: 89 e5 mov %esp,%ebp
413: 57 push %edi
414: 56 push %esi
415: 53 push %ebx
416: 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++) {
419: 8b 5d 0c mov 0xc(%ebp),%ebx
void printf(int fd, const char *fmt, ...) {
41c: 8b 75 08 mov 0x8(%ebp),%esi
for (i = 0; fmt[i]; i++) {
41f: 0f b6 13 movzbl (%ebx),%edx
422: 84 d2 test %dl,%dl
424: 74 6a je 490 <printf+0x80>
ap = (uint*)(void*)&fmt + 1;
426: 8d 45 10 lea 0x10(%ebp),%eax
429: 83 c3 01 add $0x1,%ebx
write(fd, &c, 1);
42c: 8d 7d e7 lea -0x19(%ebp),%edi
state = 0;
42f: 31 c9 xor %ecx,%ecx
ap = (uint*)(void*)&fmt + 1;
431: 89 45 d0 mov %eax,-0x30(%ebp)
434: eb 36 jmp 46c <printf+0x5c>
436: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
43d: 8d 76 00 lea 0x0(%esi),%esi
440: 89 4d d4 mov %ecx,-0x2c(%ebp)
c = fmt[i] & 0xff;
if (state == 0) {
if (c == '%') {
state = '%';
443: b9 25 00 00 00 mov $0x25,%ecx
if (c == '%') {
448: 83 f8 25 cmp $0x25,%eax
44b: 74 15 je 462 <printf+0x52>
write(fd, &c, 1);
44d: 83 ec 04 sub $0x4,%esp
450: 88 55 e7 mov %dl,-0x19(%ebp)
453: 6a 01 push $0x1
455: 57 push %edi
456: 56 push %esi
457: e8 b7 fe ff ff call 313 <write>
45c: 8b 4d d4 mov -0x2c(%ebp),%ecx
}
else {
putc(fd, c);
45f: 83 c4 10 add $0x10,%esp
for (i = 0; fmt[i]; i++) {
462: 0f b6 13 movzbl (%ebx),%edx
465: 83 c3 01 add $0x1,%ebx
468: 84 d2 test %dl,%dl
46a: 74 24 je 490 <printf+0x80>
c = fmt[i] & 0xff;
46c: 0f b6 c2 movzbl %dl,%eax
if (state == 0) {
46f: 85 c9 test %ecx,%ecx
471: 74 cd je 440 <printf+0x30>
}
}
else if (state == '%') {
473: 83 f9 25 cmp $0x25,%ecx
476: 75 ea jne 462 <printf+0x52>
if (c == 'd') {
478: 83 f8 25 cmp $0x25,%eax
47b: 0f 84 07 01 00 00 je 588 <printf+0x178>
481: 83 e8 63 sub $0x63,%eax
484: 83 f8 15 cmp $0x15,%eax
487: 77 17 ja 4a0 <printf+0x90>
489: ff 24 85 4c 07 00 00 jmp *0x74c(,%eax,4)
putc(fd, c);
}
state = 0;
}
}
}
490: 8d 65 f4 lea -0xc(%ebp),%esp
493: 5b pop %ebx
494: 5e pop %esi
495: 5f pop %edi
496: 5d pop %ebp
497: c3 ret
498: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
49f: 90 nop
write(fd, &c, 1);
4a0: 83 ec 04 sub $0x4,%esp
4a3: 88 55 d4 mov %dl,-0x2c(%ebp)
4a6: 6a 01 push $0x1
4a8: 57 push %edi
4a9: 56 push %esi
4aa: c6 45 e7 25 movb $0x25,-0x19(%ebp)
4ae: e8 60 fe ff ff call 313 <write>
putc(fd, c);
4b3: 0f b6 55 d4 movzbl -0x2c(%ebp),%edx
write(fd, &c, 1);
4b7: 83 c4 0c add $0xc,%esp
4ba: 88 55 e7 mov %dl,-0x19(%ebp)
4bd: 6a 01 push $0x1
4bf: 57 push %edi
4c0: 56 push %esi
4c1: e8 4d fe ff ff call 313 <write>
putc(fd, c);
4c6: 83 c4 10 add $0x10,%esp
state = 0;
4c9: 31 c9 xor %ecx,%ecx
4cb: eb 95 jmp 462 <printf+0x52>
4cd: 8d 76 00 lea 0x0(%esi),%esi
printint(fd, *ap, 16, 0);
4d0: 83 ec 0c sub $0xc,%esp
4d3: b9 10 00 00 00 mov $0x10,%ecx
4d8: 6a 00 push $0x0
4da: 8b 45 d0 mov -0x30(%ebp),%eax
4dd: 8b 10 mov (%eax),%edx
4df: 89 f0 mov %esi,%eax
4e1: e8 7a fe ff ff call 360 <printint>
ap++;
4e6: 83 45 d0 04 addl $0x4,-0x30(%ebp)
4ea: 83 c4 10 add $0x10,%esp
state = 0;
4ed: 31 c9 xor %ecx,%ecx
4ef: e9 6e ff ff ff jmp 462 <printf+0x52>
4f4: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
s = (char*)*ap;
4f8: 8b 45 d0 mov -0x30(%ebp),%eax
4fb: 8b 10 mov (%eax),%edx
ap++;
4fd: 83 c0 04 add $0x4,%eax
500: 89 45 d0 mov %eax,-0x30(%ebp)
if (s == 0) {
503: 85 d2 test %edx,%edx
505: 0f 84 8d 00 00 00 je 598 <printf+0x188>
while (*s != 0) {
50b: 0f b6 02 movzbl (%edx),%eax
state = 0;
50e: 31 c9 xor %ecx,%ecx
while (*s != 0) {
510: 84 c0 test %al,%al
512: 0f 84 4a ff ff ff je 462 <printf+0x52>
518: 89 5d d4 mov %ebx,-0x2c(%ebp)
51b: 89 d3 mov %edx,%ebx
51d: 8d 76 00 lea 0x0(%esi),%esi
write(fd, &c, 1);
520: 83 ec 04 sub $0x4,%esp
s++;
523: 83 c3 01 add $0x1,%ebx
526: 88 45 e7 mov %al,-0x19(%ebp)
write(fd, &c, 1);
529: 6a 01 push $0x1
52b: 57 push %edi
52c: 56 push %esi
52d: e8 e1 fd ff ff call 313 <write>
while (*s != 0) {
532: 0f b6 03 movzbl (%ebx),%eax
535: 83 c4 10 add $0x10,%esp
538: 84 c0 test %al,%al
53a: 75 e4 jne 520 <printf+0x110>
state = 0;
53c: 8b 5d d4 mov -0x2c(%ebp),%ebx
53f: 31 c9 xor %ecx,%ecx
541: e9 1c ff ff ff jmp 462 <printf+0x52>
546: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
54d: 8d 76 00 lea 0x0(%esi),%esi
printint(fd, *ap, 10, 1);
550: 83 ec 0c sub $0xc,%esp
553: b9 0a 00 00 00 mov $0xa,%ecx
558: 6a 01 push $0x1
55a: e9 7b ff ff ff jmp 4da <printf+0xca>
55f: 90 nop
putc(fd, *ap);
560: 8b 45 d0 mov -0x30(%ebp),%eax
write(fd, &c, 1);
563: 83 ec 04 sub $0x4,%esp
putc(fd, *ap);
566: 8b 00 mov (%eax),%eax
write(fd, &c, 1);
568: 6a 01 push $0x1
56a: 57 push %edi
56b: 56 push %esi
putc(fd, *ap);
56c: 88 45 e7 mov %al,-0x19(%ebp)
write(fd, &c, 1);
56f: e8 9f fd ff ff call 313 <write>
ap++;
574: 83 45 d0 04 addl $0x4,-0x30(%ebp)
578: 83 c4 10 add $0x10,%esp
state = 0;
57b: 31 c9 xor %ecx,%ecx
57d: e9 e0 fe ff ff jmp 462 <printf+0x52>
582: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
putc(fd, c);
588: 88 55 e7 mov %dl,-0x19(%ebp)
write(fd, &c, 1);
58b: 83 ec 04 sub $0x4,%esp
58e: e9 2a ff ff ff jmp 4bd <printf+0xad>
593: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
597: 90 nop
s = "(null)";
598: ba 44 07 00 00 mov $0x744,%edx
while (*s != 0) {
59d: 89 5d d4 mov %ebx,-0x2c(%ebp)
5a0: b8 28 00 00 00 mov $0x28,%eax
5a5: 89 d3 mov %edx,%ebx
5a7: e9 74 ff ff ff jmp 520 <printf+0x110>
5ac: 66 90 xchg %ax,%ax
5ae: 66 90 xchg %ax,%ax
000005b0 <free>:
typedef union header Header;
static Header base;
static Header *freep;
void free(void *ap) {
5b0: 55 push %ebp
Header *bp, *p;
bp = (Header*)ap - 1;
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
5b1: a1 58 0a 00 00 mov 0xa58,%eax
void free(void *ap) {
5b6: 89 e5 mov %esp,%ebp
5b8: 57 push %edi
5b9: 56 push %esi
5ba: 53 push %ebx
5bb: 8b 5d 08 mov 0x8(%ebp),%ebx
bp = (Header*)ap - 1;
5be: 8d 4b f8 lea -0x8(%ebx),%ecx
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
5c1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
5c8: 89 c2 mov %eax,%edx
5ca: 8b 00 mov (%eax),%eax
5cc: 39 ca cmp %ecx,%edx
5ce: 73 30 jae 600 <free+0x50>
5d0: 39 c1 cmp %eax,%ecx
5d2: 72 04 jb 5d8 <free+0x28>
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
5d4: 39 c2 cmp %eax,%edx
5d6: 72 f0 jb 5c8 <free+0x18>
break;
}
}
if (bp + bp->s.size == p->s.ptr) {
5d8: 8b 73 fc mov -0x4(%ebx),%esi
5db: 8d 3c f1 lea (%ecx,%esi,8),%edi
5de: 39 f8 cmp %edi,%eax
5e0: 74 30 je 612 <free+0x62>
bp->s.size += p->s.ptr->s.size;
bp->s.ptr = p->s.ptr->s.ptr;
5e2: 89 43 f8 mov %eax,-0x8(%ebx)
}
else {
bp->s.ptr = p->s.ptr;
}
if (p + p->s.size == bp) {
5e5: 8b 42 04 mov 0x4(%edx),%eax
5e8: 8d 34 c2 lea (%edx,%eax,8),%esi
5eb: 39 f1 cmp %esi,%ecx
5ed: 74 3a je 629 <free+0x79>
p->s.size += bp->s.size;
p->s.ptr = bp->s.ptr;
5ef: 89 0a mov %ecx,(%edx)
}
else {
p->s.ptr = bp;
}
freep = p;
}
5f1: 5b pop %ebx
freep = p;
5f2: 89 15 58 0a 00 00 mov %edx,0xa58
}
5f8: 5e pop %esi
5f9: 5f pop %edi
5fa: 5d pop %ebp
5fb: c3 ret
5fc: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
600: 39 c2 cmp %eax,%edx
602: 72 c4 jb 5c8 <free+0x18>
604: 39 c1 cmp %eax,%ecx
606: 73 c0 jae 5c8 <free+0x18>
if (bp + bp->s.size == p->s.ptr) {
608: 8b 73 fc mov -0x4(%ebx),%esi
60b: 8d 3c f1 lea (%ecx,%esi,8),%edi
60e: 39 f8 cmp %edi,%eax
610: 75 d0 jne 5e2 <free+0x32>
bp->s.size += p->s.ptr->s.size;
612: 03 70 04 add 0x4(%eax),%esi
615: 89 73 fc mov %esi,-0x4(%ebx)
bp->s.ptr = p->s.ptr->s.ptr;
618: 8b 02 mov (%edx),%eax
61a: 8b 00 mov (%eax),%eax
61c: 89 43 f8 mov %eax,-0x8(%ebx)
if (p + p->s.size == bp) {
61f: 8b 42 04 mov 0x4(%edx),%eax
622: 8d 34 c2 lea (%edx,%eax,8),%esi
625: 39 f1 cmp %esi,%ecx
627: 75 c6 jne 5ef <free+0x3f>
p->s.size += bp->s.size;
629: 03 43 fc add -0x4(%ebx),%eax
freep = p;
62c: 89 15 58 0a 00 00 mov %edx,0xa58
p->s.size += bp->s.size;
632: 89 42 04 mov %eax,0x4(%edx)
p->s.ptr = bp->s.ptr;
635: 8b 4b f8 mov -0x8(%ebx),%ecx
638: 89 0a mov %ecx,(%edx)
}
63a: 5b pop %ebx
63b: 5e pop %esi
63c: 5f pop %edi
63d: 5d pop %ebp
63e: c3 ret
63f: 90 nop
00000640 <malloc>:
hp->s.size = nu;
free((void*)(hp + 1));
return freep;
}
void* malloc(uint nbytes) {
640: 55 push %ebp
641: 89 e5 mov %esp,%ebp
643: 57 push %edi
644: 56 push %esi
645: 53 push %ebx
646: 83 ec 1c sub $0x1c,%esp
Header *p, *prevp;
uint nunits;
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
649: 8b 45 08 mov 0x8(%ebp),%eax
if ((prevp = freep) == 0) {
64c: 8b 3d 58 0a 00 00 mov 0xa58,%edi
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
652: 8d 70 07 lea 0x7(%eax),%esi
655: c1 ee 03 shr $0x3,%esi
658: 83 c6 01 add $0x1,%esi
if ((prevp = freep) == 0) {
65b: 85 ff test %edi,%edi
65d: 0f 84 9d 00 00 00 je 700 <malloc+0xc0>
base.s.ptr = freep = prevp = &base;
base.s.size = 0;
}
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
663: 8b 17 mov (%edi),%edx
if (p->s.size >= nunits) {
665: 8b 4a 04 mov 0x4(%edx),%ecx
668: 39 f1 cmp %esi,%ecx
66a: 73 6a jae 6d6 <malloc+0x96>
66c: bb 00 10 00 00 mov $0x1000,%ebx
671: 39 de cmp %ebx,%esi
673: 0f 43 de cmovae %esi,%ebx
p = sbrk(nu * sizeof(Header));
676: 8d 04 dd 00 00 00 00 lea 0x0(,%ebx,8),%eax
67d: 89 45 e4 mov %eax,-0x1c(%ebp)
680: eb 17 jmp 699 <malloc+0x59>
682: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
688: 8b 02 mov (%edx),%eax
if (p->s.size >= nunits) {
68a: 8b 48 04 mov 0x4(%eax),%ecx
68d: 39 f1 cmp %esi,%ecx
68f: 73 4f jae 6e0 <malloc+0xa0>
p->s.size = nunits;
}
freep = prevp;
return (void*)(p + 1);
}
if (p == freep) {
691: 8b 3d 58 0a 00 00 mov 0xa58,%edi
697: 89 c2 mov %eax,%edx
699: 39 d7 cmp %edx,%edi
69b: 75 eb jne 688 <malloc+0x48>
p = sbrk(nu * sizeof(Header));
69d: 83 ec 0c sub $0xc,%esp
6a0: ff 75 e4 push -0x1c(%ebp)
6a3: e8 4b fc ff ff call 2f3 <sbrk>
if (p == (char*)-1) {
6a8: 83 c4 10 add $0x10,%esp
6ab: 83 f8 ff cmp $0xffffffff,%eax
6ae: 74 1c je 6cc <malloc+0x8c>
hp->s.size = nu;
6b0: 89 58 04 mov %ebx,0x4(%eax)
free((void*)(hp + 1));
6b3: 83 ec 0c sub $0xc,%esp
6b6: 83 c0 08 add $0x8,%eax
6b9: 50 push %eax
6ba: e8 f1 fe ff ff call 5b0 <free>
return freep;
6bf: 8b 15 58 0a 00 00 mov 0xa58,%edx
if ((p = morecore(nunits)) == 0) {
6c5: 83 c4 10 add $0x10,%esp
6c8: 85 d2 test %edx,%edx
6ca: 75 bc jne 688 <malloc+0x48>
return 0;
}
}
}
}
6cc: 8d 65 f4 lea -0xc(%ebp),%esp
return 0;
6cf: 31 c0 xor %eax,%eax
}
6d1: 5b pop %ebx
6d2: 5e pop %esi
6d3: 5f pop %edi
6d4: 5d pop %ebp
6d5: c3 ret
if (p->s.size >= nunits) {
6d6: 89 d0 mov %edx,%eax
6d8: 89 fa mov %edi,%edx
6da: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
if (p->s.size == nunits) {
6e0: 39 ce cmp %ecx,%esi
6e2: 74 4c je 730 <malloc+0xf0>
p->s.size -= nunits;
6e4: 29 f1 sub %esi,%ecx
6e6: 89 48 04 mov %ecx,0x4(%eax)
p += p->s.size;
6e9: 8d 04 c8 lea (%eax,%ecx,8),%eax
p->s.size = nunits;
6ec: 89 70 04 mov %esi,0x4(%eax)
freep = prevp;
6ef: 89 15 58 0a 00 00 mov %edx,0xa58
}
6f5: 8d 65 f4 lea -0xc(%ebp),%esp
return (void*)(p + 1);
6f8: 83 c0 08 add $0x8,%eax
}
6fb: 5b pop %ebx
6fc: 5e pop %esi
6fd: 5f pop %edi
6fe: 5d pop %ebp
6ff: c3 ret
base.s.ptr = freep = prevp = &base;
700: c7 05 58 0a 00 00 5c movl $0xa5c,0xa58
707: 0a 00 00
base.s.size = 0;
70a: bf 5c 0a 00 00 mov $0xa5c,%edi
base.s.ptr = freep = prevp = &base;
70f: c7 05 5c 0a 00 00 5c movl $0xa5c,0xa5c
716: 0a 00 00
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
719: 89 fa mov %edi,%edx
base.s.size = 0;
71b: c7 05 60 0a 00 00 00 movl $0x0,0xa60
722: 00 00 00
if (p->s.size >= nunits) {
725: e9 42 ff ff ff jmp 66c <malloc+0x2c>
72a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
prevp->s.ptr = p->s.ptr;
730: 8b 08 mov (%eax),%ecx
732: 89 0a mov %ecx,(%edx)
734: eb b9 jmp 6ef <malloc+0xaf>