1239 lines
42 KiB
NASM
1239 lines
42 KiB
NASM
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_init: file format elf32-i386
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Disassembly of section .text:
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00000000 <main>:
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#include "user.h"
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#include "fcntl.h"
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char *argv[] = { "sh", 0 };
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int main(void) {
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0: 8d 4c 24 04 lea 0x4(%esp),%ecx
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4: 83 e4 f0 and $0xfffffff0,%esp
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7: ff 71 fc push -0x4(%ecx)
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a: 55 push %ebp
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b: 89 e5 mov %esp,%ebp
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d: 53 push %ebx
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e: 51 push %ecx
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int pid, wpid;
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if (open("console", O_RDWR) < 0) {
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f: 83 ec 08 sub $0x8,%esp
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12: 6a 02 push $0x2
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14: 68 d8 07 00 00 push $0x7d8
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19: e8 7d 03 00 00 call 39b <open>
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1e: 83 c4 10 add $0x10,%esp
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21: 85 c0 test %eax,%eax
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23: 0f 88 8d 00 00 00 js b6 <main+0xb6>
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mknod("console", 1, 1);
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open("console", O_RDWR);
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}
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dup(0); // stdout
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29: 83 ec 0c sub $0xc,%esp
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2c: 6a 00 push $0x0
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2e: e8 40 03 00 00 call 373 <dup>
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dup(0); // stderr
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33: c7 04 24 00 00 00 00 movl $0x0,(%esp)
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3a: e8 34 03 00 00 call 373 <dup>
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3f: 83 c4 10 add $0x10,%esp
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42: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
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for (;;) {
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printf(1, "init: starting sh\n");
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48: 83 ec 08 sub $0x8,%esp
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4b: 68 e0 07 00 00 push $0x7e0
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50: 6a 01 push $0x1
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52: e8 59 04 00 00 call 4b0 <printf>
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pid = fork();
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57: e8 cf 02 00 00 call 32b <fork>
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if (pid < 0) {
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5c: 83 c4 10 add $0x10,%esp
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pid = fork();
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5f: 89 c3 mov %eax,%ebx
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if (pid < 0) {
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61: 85 c0 test %eax,%eax
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63: 78 1a js 7f <main+0x7f>
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printf(1, "init: fork failed\n");
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exit();
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}
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if (pid == 0) {
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65: 74 2b je 92 <main+0x92>
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67: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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6e: 66 90 xchg %ax,%ax
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exec("sh", argv);
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printf(1, "init: exec sh failed\n");
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exit();
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}
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while ((wpid = wait()) >= 0 && wpid != pid) {
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70: e8 c6 02 00 00 call 33b <wait>
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75: 85 c0 test %eax,%eax
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77: 78 cf js 48 <main+0x48>
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79: 39 c3 cmp %eax,%ebx
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7b: 75 f3 jne 70 <main+0x70>
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7d: eb c9 jmp 48 <main+0x48>
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printf(1, "init: fork failed\n");
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7f: 53 push %ebx
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80: 53 push %ebx
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81: 68 f3 07 00 00 push $0x7f3
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86: 6a 01 push $0x1
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88: e8 23 04 00 00 call 4b0 <printf>
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exit();
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8d: e8 a1 02 00 00 call 333 <exit>
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exec("sh", argv);
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92: 50 push %eax
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93: 50 push %eax
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94: 68 2c 0b 00 00 push $0xb2c
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99: 68 06 08 00 00 push $0x806
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9e: e8 b8 02 00 00 call 35b <exec>
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printf(1, "init: exec sh failed\n");
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a3: 5a pop %edx
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a4: 59 pop %ecx
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a5: 68 09 08 00 00 push $0x809
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aa: 6a 01 push $0x1
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ac: e8 ff 03 00 00 call 4b0 <printf>
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exit();
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b1: e8 7d 02 00 00 call 333 <exit>
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mknod("console", 1, 1);
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b6: 50 push %eax
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b7: 6a 01 push $0x1
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b9: 6a 01 push $0x1
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bb: 68 d8 07 00 00 push $0x7d8
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c0: e8 e6 02 00 00 call 3ab <mknod>
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open("console", O_RDWR);
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c5: 58 pop %eax
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c6: 5a pop %edx
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c7: 6a 02 push $0x2
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c9: 68 d8 07 00 00 push $0x7d8
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ce: e8 c8 02 00 00 call 39b <open>
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d3: 83 c4 10 add $0x10,%esp
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d6: e9 4e ff ff ff jmp 29 <main+0x29>
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db: 66 90 xchg %ax,%ax
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dd: 66 90 xchg %ax,%ax
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df: 90 nop
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000000e0 <strcpy>:
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#include "stat.h"
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#include "fcntl.h"
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#include "user.h"
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#include "x86.h"
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char*strcpy(char *s, const char *t) {
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e0: 55 push %ebp
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char *os;
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os = s;
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while ((*s++ = *t++) != 0) {
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e1: 31 c0 xor %eax,%eax
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char*strcpy(char *s, const char *t) {
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e3: 89 e5 mov %esp,%ebp
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e5: 53 push %ebx
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e6: 8b 4d 08 mov 0x8(%ebp),%ecx
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e9: 8b 5d 0c mov 0xc(%ebp),%ebx
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ec: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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while ((*s++ = *t++) != 0) {
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f0: 0f b6 14 03 movzbl (%ebx,%eax,1),%edx
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f4: 88 14 01 mov %dl,(%ecx,%eax,1)
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f7: 83 c0 01 add $0x1,%eax
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fa: 84 d2 test %dl,%dl
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fc: 75 f2 jne f0 <strcpy+0x10>
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;
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}
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return os;
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}
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fe: 8b 5d fc mov -0x4(%ebp),%ebx
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101: 89 c8 mov %ecx,%eax
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103: c9 leave
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104: c3 ret
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105: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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10c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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00000110 <strcmp>:
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int strcmp(const char *p, const char *q) {
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110: 55 push %ebp
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111: 89 e5 mov %esp,%ebp
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113: 53 push %ebx
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114: 8b 55 08 mov 0x8(%ebp),%edx
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117: 8b 4d 0c mov 0xc(%ebp),%ecx
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while (*p && *p == *q) {
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11a: 0f b6 02 movzbl (%edx),%eax
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11d: 84 c0 test %al,%al
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11f: 75 17 jne 138 <strcmp+0x28>
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121: eb 3a jmp 15d <strcmp+0x4d>
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123: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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127: 90 nop
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128: 0f b6 42 01 movzbl 0x1(%edx),%eax
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p++, q++;
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12c: 83 c2 01 add $0x1,%edx
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12f: 8d 59 01 lea 0x1(%ecx),%ebx
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while (*p && *p == *q) {
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132: 84 c0 test %al,%al
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134: 74 1a je 150 <strcmp+0x40>
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p++, q++;
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136: 89 d9 mov %ebx,%ecx
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while (*p && *p == *q) {
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138: 0f b6 19 movzbl (%ecx),%ebx
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13b: 38 c3 cmp %al,%bl
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13d: 74 e9 je 128 <strcmp+0x18>
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}
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return (uchar) * p - (uchar) * q;
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13f: 29 d8 sub %ebx,%eax
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}
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141: 8b 5d fc mov -0x4(%ebp),%ebx
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144: c9 leave
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145: c3 ret
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146: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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14d: 8d 76 00 lea 0x0(%esi),%esi
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return (uchar) * p - (uchar) * q;
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150: 0f b6 59 01 movzbl 0x1(%ecx),%ebx
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154: 31 c0 xor %eax,%eax
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156: 29 d8 sub %ebx,%eax
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}
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158: 8b 5d fc mov -0x4(%ebp),%ebx
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15b: c9 leave
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15c: c3 ret
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return (uchar) * p - (uchar) * q;
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15d: 0f b6 19 movzbl (%ecx),%ebx
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160: 31 c0 xor %eax,%eax
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162: eb db jmp 13f <strcmp+0x2f>
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164: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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16b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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16f: 90 nop
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00000170 <strlen>:
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uint strlen(const char *s) {
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170: 55 push %ebp
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171: 89 e5 mov %esp,%ebp
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173: 8b 55 08 mov 0x8(%ebp),%edx
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int n;
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for (n = 0; s[n]; n++) {
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176: 80 3a 00 cmpb $0x0,(%edx)
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179: 74 15 je 190 <strlen+0x20>
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17b: 31 c0 xor %eax,%eax
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17d: 8d 76 00 lea 0x0(%esi),%esi
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180: 83 c0 01 add $0x1,%eax
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183: 80 3c 02 00 cmpb $0x0,(%edx,%eax,1)
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187: 89 c1 mov %eax,%ecx
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189: 75 f5 jne 180 <strlen+0x10>
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;
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}
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return n;
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}
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18b: 89 c8 mov %ecx,%eax
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18d: 5d pop %ebp
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18e: c3 ret
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18f: 90 nop
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for (n = 0; s[n]; n++) {
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190: 31 c9 xor %ecx,%ecx
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}
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192: 5d pop %ebp
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193: 89 c8 mov %ecx,%eax
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195: c3 ret
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196: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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19d: 8d 76 00 lea 0x0(%esi),%esi
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000001a0 <memset>:
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void* memset(void *dst, int c, uint n) {
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1a0: 55 push %ebp
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1a1: 89 e5 mov %esp,%ebp
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1a3: 57 push %edi
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1a4: 8b 55 08 mov 0x8(%ebp),%edx
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"d" (port), "0" (addr), "1" (cnt) :
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"cc");
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}
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static inline void stosb(void *addr, int data, int cnt) {
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asm volatile ("cld; rep stosb" :
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1a7: 8b 4d 10 mov 0x10(%ebp),%ecx
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1aa: 8b 45 0c mov 0xc(%ebp),%eax
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1ad: 89 d7 mov %edx,%edi
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1af: fc cld
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1b0: f3 aa rep stos %al,%es:(%edi)
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stosb(dst, c, n);
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return dst;
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}
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1b2: 8b 7d fc mov -0x4(%ebp),%edi
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1b5: 89 d0 mov %edx,%eax
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1b7: c9 leave
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1b8: c3 ret
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1b9: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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000001c0 <strchr>:
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char* strchr(const char *s, char c) {
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1c0: 55 push %ebp
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1c1: 89 e5 mov %esp,%ebp
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1c3: 8b 45 08 mov 0x8(%ebp),%eax
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1c6: 0f b6 4d 0c movzbl 0xc(%ebp),%ecx
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for (; *s; s++) {
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1ca: 0f b6 10 movzbl (%eax),%edx
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1cd: 84 d2 test %dl,%dl
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1cf: 75 12 jne 1e3 <strchr+0x23>
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1d1: eb 1d jmp 1f0 <strchr+0x30>
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1d3: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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1d7: 90 nop
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1d8: 0f b6 50 01 movzbl 0x1(%eax),%edx
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1dc: 83 c0 01 add $0x1,%eax
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1df: 84 d2 test %dl,%dl
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1e1: 74 0d je 1f0 <strchr+0x30>
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if (*s == c) {
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1e3: 38 d1 cmp %dl,%cl
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1e5: 75 f1 jne 1d8 <strchr+0x18>
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return (char*)s;
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}
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}
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return 0;
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}
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1e7: 5d pop %ebp
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1e8: c3 ret
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1e9: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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return 0;
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1f0: 31 c0 xor %eax,%eax
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}
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1f2: 5d pop %ebp
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1f3: c3 ret
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1f4: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1fb: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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1ff: 90 nop
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00000200 <gets>:
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char* gets(char *buf, int max) {
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200: 55 push %ebp
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201: 89 e5 mov %esp,%ebp
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203: 57 push %edi
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204: 56 push %esi
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int i, cc;
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char c;
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for (i = 0; i + 1 < max;) {
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cc = read(0, &c, 1);
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205: 8d 7d e7 lea -0x19(%ebp),%edi
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char* gets(char *buf, int max) {
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208: 53 push %ebx
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for (i = 0; i + 1 < max;) {
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209: 31 db xor %ebx,%ebx
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char* gets(char *buf, int max) {
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20b: 83 ec 1c sub $0x1c,%esp
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for (i = 0; i + 1 < max;) {
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20e: eb 27 jmp 237 <gets+0x37>
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cc = read(0, &c, 1);
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210: 83 ec 04 sub $0x4,%esp
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213: 6a 01 push $0x1
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215: 57 push %edi
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216: 6a 00 push $0x0
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218: e8 2e 01 00 00 call 34b <read>
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if (cc < 1) {
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21d: 83 c4 10 add $0x10,%esp
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220: 85 c0 test %eax,%eax
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222: 7e 1d jle 241 <gets+0x41>
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break;
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}
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buf[i++] = c;
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224: 0f b6 45 e7 movzbl -0x19(%ebp),%eax
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228: 8b 55 08 mov 0x8(%ebp),%edx
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22b: 88 44 1a ff mov %al,-0x1(%edx,%ebx,1)
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if (c == '\n' || c == '\r') {
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22f: 3c 0a cmp $0xa,%al
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231: 74 1d je 250 <gets+0x50>
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233: 3c 0d cmp $0xd,%al
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235: 74 19 je 250 <gets+0x50>
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for (i = 0; i + 1 < max;) {
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237: 89 de mov %ebx,%esi
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239: 83 c3 01 add $0x1,%ebx
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23c: 3b 5d 0c cmp 0xc(%ebp),%ebx
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23f: 7c cf jl 210 <gets+0x10>
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break;
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}
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}
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buf[i] = '\0';
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241: 8b 45 08 mov 0x8(%ebp),%eax
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244: c6 04 30 00 movb $0x0,(%eax,%esi,1)
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return buf;
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}
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248: 8d 65 f4 lea -0xc(%ebp),%esp
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24b: 5b pop %ebx
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24c: 5e pop %esi
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24d: 5f pop %edi
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24e: 5d pop %ebp
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24f: c3 ret
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buf[i] = '\0';
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250: 8b 45 08 mov 0x8(%ebp),%eax
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253: 89 de mov %ebx,%esi
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255: c6 04 30 00 movb $0x0,(%eax,%esi,1)
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}
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259: 8d 65 f4 lea -0xc(%ebp),%esp
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25c: 5b pop %ebx
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25d: 5e pop %esi
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25e: 5f pop %edi
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25f: 5d pop %ebp
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260: c3 ret
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261: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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268: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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26f: 90 nop
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00000270 <stat>:
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int stat(const char *n, struct stat *st) {
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270: 55 push %ebp
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271: 89 e5 mov %esp,%ebp
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273: 56 push %esi
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274: 53 push %ebx
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int fd;
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int r;
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fd = open(n, O_RDONLY);
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275: 83 ec 08 sub $0x8,%esp
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278: 6a 00 push $0x0
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27a: ff 75 08 push 0x8(%ebp)
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27d: e8 19 01 00 00 call 39b <open>
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if (fd < 0) {
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282: 83 c4 10 add $0x10,%esp
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285: 85 c0 test %eax,%eax
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287: 78 27 js 2b0 <stat+0x40>
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return -1;
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}
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r = fstat(fd, st);
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289: 83 ec 08 sub $0x8,%esp
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28c: ff 75 0c push 0xc(%ebp)
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28f: 89 c3 mov %eax,%ebx
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291: 50 push %eax
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292: e8 cc 00 00 00 call 363 <fstat>
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close(fd);
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297: 89 1c 24 mov %ebx,(%esp)
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r = fstat(fd, st);
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29a: 89 c6 mov %eax,%esi
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close(fd);
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29c: e8 2a 01 00 00 call 3cb <close>
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return r;
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2a1: 83 c4 10 add $0x10,%esp
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}
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2a4: 8d 65 f8 lea -0x8(%ebp),%esp
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2a7: 89 f0 mov %esi,%eax
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2a9: 5b pop %ebx
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2aa: 5e pop %esi
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2ab: 5d pop %ebp
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2ac: c3 ret
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2ad: 8d 76 00 lea 0x0(%esi),%esi
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return -1;
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2b0: be ff ff ff ff mov $0xffffffff,%esi
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2b5: eb ed jmp 2a4 <stat+0x34>
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2b7: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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2be: 66 90 xchg %ax,%ax
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000002c0 <atoi>:
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int atoi(const char *s) {
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2c0: 55 push %ebp
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2c1: 89 e5 mov %esp,%ebp
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2c3: 53 push %ebx
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2c4: 8b 55 08 mov 0x8(%ebp),%edx
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int n;
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n = 0;
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while ('0' <= *s && *s <= '9') {
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2c7: 0f be 02 movsbl (%edx),%eax
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2ca: 8d 48 d0 lea -0x30(%eax),%ecx
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|
2cd: 80 f9 09 cmp $0x9,%cl
|
|
n = 0;
|
|
2d0: b9 00 00 00 00 mov $0x0,%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
2d5: 77 1e ja 2f5 <atoi+0x35>
|
|
2d7: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
2de: 66 90 xchg %ax,%ax
|
|
n = n * 10 + *s++ - '0';
|
|
2e0: 83 c2 01 add $0x1,%edx
|
|
2e3: 8d 0c 89 lea (%ecx,%ecx,4),%ecx
|
|
2e6: 8d 4c 48 d0 lea -0x30(%eax,%ecx,2),%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
2ea: 0f be 02 movsbl (%edx),%eax
|
|
2ed: 8d 58 d0 lea -0x30(%eax),%ebx
|
|
2f0: 80 fb 09 cmp $0x9,%bl
|
|
2f3: 76 eb jbe 2e0 <atoi+0x20>
|
|
}
|
|
return n;
|
|
}
|
|
2f5: 8b 5d fc mov -0x4(%ebp),%ebx
|
|
2f8: 89 c8 mov %ecx,%eax
|
|
2fa: c9 leave
|
|
2fb: c3 ret
|
|
2fc: 8d 74 26 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: 57 push %edi
|
|
304: 8b 45 10 mov 0x10(%ebp),%eax
|
|
307: 8b 55 08 mov 0x8(%ebp),%edx
|
|
30a: 56 push %esi
|
|
30b: 8b 75 0c mov 0xc(%ebp),%esi
|
|
char *dst;
|
|
const char *src;
|
|
|
|
dst = vdst;
|
|
src = vsrc;
|
|
while (n-- > 0) {
|
|
30e: 85 c0 test %eax,%eax
|
|
310: 7e 13 jle 325 <memmove+0x25>
|
|
312: 01 d0 add %edx,%eax
|
|
dst = vdst;
|
|
314: 89 d7 mov %edx,%edi
|
|
316: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
31d: 8d 76 00 lea 0x0(%esi),%esi
|
|
*dst++ = *src++;
|
|
320: a4 movsb %ds:(%esi),%es:(%edi)
|
|
while (n-- > 0) {
|
|
321: 39 f8 cmp %edi,%eax
|
|
323: 75 fb jne 320 <memmove+0x20>
|
|
}
|
|
return vdst;
|
|
}
|
|
325: 5e pop %esi
|
|
326: 89 d0 mov %edx,%eax
|
|
328: 5f pop %edi
|
|
329: 5d pop %ebp
|
|
32a: c3 ret
|
|
|
|
0000032b <fork>:
|
|
name: \
|
|
movl $SYS_ ## name, %eax; \
|
|
int $T_SYSCALL; \
|
|
ret
|
|
|
|
SYSCALL(fork)
|
|
32b: b8 01 00 00 00 mov $0x1,%eax
|
|
330: cd 40 int $0x40
|
|
332: c3 ret
|
|
|
|
00000333 <exit>:
|
|
SYSCALL(exit)
|
|
333: b8 02 00 00 00 mov $0x2,%eax
|
|
338: cd 40 int $0x40
|
|
33a: c3 ret
|
|
|
|
0000033b <wait>:
|
|
SYSCALL(wait)
|
|
33b: b8 03 00 00 00 mov $0x3,%eax
|
|
340: cd 40 int $0x40
|
|
342: c3 ret
|
|
|
|
00000343 <pipe>:
|
|
SYSCALL(pipe)
|
|
343: b8 04 00 00 00 mov $0x4,%eax
|
|
348: cd 40 int $0x40
|
|
34a: c3 ret
|
|
|
|
0000034b <read>:
|
|
SYSCALL(read)
|
|
34b: b8 05 00 00 00 mov $0x5,%eax
|
|
350: cd 40 int $0x40
|
|
352: c3 ret
|
|
|
|
00000353 <kill>:
|
|
SYSCALL(kill)
|
|
353: b8 06 00 00 00 mov $0x6,%eax
|
|
358: cd 40 int $0x40
|
|
35a: c3 ret
|
|
|
|
0000035b <exec>:
|
|
SYSCALL(exec)
|
|
35b: b8 07 00 00 00 mov $0x7,%eax
|
|
360: cd 40 int $0x40
|
|
362: c3 ret
|
|
|
|
00000363 <fstat>:
|
|
SYSCALL(fstat)
|
|
363: b8 08 00 00 00 mov $0x8,%eax
|
|
368: cd 40 int $0x40
|
|
36a: c3 ret
|
|
|
|
0000036b <chdir>:
|
|
SYSCALL(chdir)
|
|
36b: b8 09 00 00 00 mov $0x9,%eax
|
|
370: cd 40 int $0x40
|
|
372: c3 ret
|
|
|
|
00000373 <dup>:
|
|
SYSCALL(dup)
|
|
373: b8 0a 00 00 00 mov $0xa,%eax
|
|
378: cd 40 int $0x40
|
|
37a: c3 ret
|
|
|
|
0000037b <getpid>:
|
|
SYSCALL(getpid)
|
|
37b: b8 0b 00 00 00 mov $0xb,%eax
|
|
380: cd 40 int $0x40
|
|
382: c3 ret
|
|
|
|
00000383 <sbrk>:
|
|
SYSCALL(sbrk)
|
|
383: b8 0c 00 00 00 mov $0xc,%eax
|
|
388: cd 40 int $0x40
|
|
38a: c3 ret
|
|
|
|
0000038b <sleep>:
|
|
SYSCALL(sleep)
|
|
38b: b8 0d 00 00 00 mov $0xd,%eax
|
|
390: cd 40 int $0x40
|
|
392: c3 ret
|
|
|
|
00000393 <uptime>:
|
|
SYSCALL(uptime)
|
|
393: b8 0e 00 00 00 mov $0xe,%eax
|
|
398: cd 40 int $0x40
|
|
39a: c3 ret
|
|
|
|
0000039b <open>:
|
|
SYSCALL(open)
|
|
39b: b8 0f 00 00 00 mov $0xf,%eax
|
|
3a0: cd 40 int $0x40
|
|
3a2: c3 ret
|
|
|
|
000003a3 <write>:
|
|
SYSCALL(write)
|
|
3a3: b8 10 00 00 00 mov $0x10,%eax
|
|
3a8: cd 40 int $0x40
|
|
3aa: c3 ret
|
|
|
|
000003ab <mknod>:
|
|
SYSCALL(mknod)
|
|
3ab: b8 11 00 00 00 mov $0x11,%eax
|
|
3b0: cd 40 int $0x40
|
|
3b2: c3 ret
|
|
|
|
000003b3 <unlink>:
|
|
SYSCALL(unlink)
|
|
3b3: b8 12 00 00 00 mov $0x12,%eax
|
|
3b8: cd 40 int $0x40
|
|
3ba: c3 ret
|
|
|
|
000003bb <link>:
|
|
SYSCALL(link)
|
|
3bb: b8 13 00 00 00 mov $0x13,%eax
|
|
3c0: cd 40 int $0x40
|
|
3c2: c3 ret
|
|
|
|
000003c3 <mkdir>:
|
|
SYSCALL(mkdir)
|
|
3c3: b8 14 00 00 00 mov $0x14,%eax
|
|
3c8: cd 40 int $0x40
|
|
3ca: c3 ret
|
|
|
|
000003cb <close>:
|
|
SYSCALL(close)
|
|
3cb: b8 15 00 00 00 mov $0x15,%eax
|
|
3d0: cd 40 int $0x40
|
|
3d2: c3 ret
|
|
|
|
000003d3 <getch>:
|
|
SYSCALL(getch)
|
|
3d3: b8 16 00 00 00 mov $0x16,%eax
|
|
3d8: cd 40 int $0x40
|
|
3da: c3 ret
|
|
|
|
000003db <greeting>:
|
|
SYSCALL(greeting)
|
|
3db: b8 17 00 00 00 mov $0x17,%eax
|
|
3e0: cd 40 int $0x40
|
|
3e2: c3 ret
|
|
|
|
000003e3 <shutdown>:
|
|
SYSCALL(shutdown)
|
|
3e3: b8 18 00 00 00 mov $0x18,%eax
|
|
3e8: cd 40 int $0x40
|
|
3ea: c3 ret
|
|
|
|
000003eb <screen>:
|
|
SYSCALL(screen)
|
|
3eb: b8 19 00 00 00 mov $0x19,%eax
|
|
3f0: cd 40 int $0x40
|
|
3f2: c3 ret
|
|
|
|
000003f3 <cls>:
|
|
SYSCALL(cls)
|
|
3f3: b8 1a 00 00 00 mov $0x1a,%eax
|
|
3f8: cd 40 int $0x40
|
|
3fa: c3 ret
|
|
3fb: 66 90 xchg %ax,%ax
|
|
3fd: 66 90 xchg %ax,%ax
|
|
3ff: 90 nop
|
|
|
|
00000400 <printint>:
|
|
|
|
static void putc(int fd, char c) {
|
|
write(fd, &c, 1);
|
|
}
|
|
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
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 3c sub $0x3c,%esp
|
|
409: 89 4d c4 mov %ecx,-0x3c(%ebp)
|
|
uint x;
|
|
|
|
neg = 0;
|
|
if (sgn && xx < 0) {
|
|
neg = 1;
|
|
x = -xx;
|
|
40c: 89 d1 mov %edx,%ecx
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
40e: 89 45 b8 mov %eax,-0x48(%ebp)
|
|
if (sgn && xx < 0) {
|
|
411: 85 d2 test %edx,%edx
|
|
413: 0f 89 7f 00 00 00 jns 498 <printint+0x98>
|
|
419: f6 45 08 01 testb $0x1,0x8(%ebp)
|
|
41d: 74 79 je 498 <printint+0x98>
|
|
neg = 1;
|
|
41f: c7 45 bc 01 00 00 00 movl $0x1,-0x44(%ebp)
|
|
x = -xx;
|
|
426: f7 d9 neg %ecx
|
|
}
|
|
else {
|
|
x = xx;
|
|
}
|
|
|
|
i = 0;
|
|
428: 31 db xor %ebx,%ebx
|
|
42a: 8d 75 d7 lea -0x29(%ebp),%esi
|
|
42d: 8d 76 00 lea 0x0(%esi),%esi
|
|
do {
|
|
buf[i++] = digits[x % base];
|
|
430: 89 c8 mov %ecx,%eax
|
|
432: 31 d2 xor %edx,%edx
|
|
434: 89 cf mov %ecx,%edi
|
|
436: f7 75 c4 divl -0x3c(%ebp)
|
|
439: 0f b6 92 80 08 00 00 movzbl 0x880(%edx),%edx
|
|
440: 89 45 c0 mov %eax,-0x40(%ebp)
|
|
443: 89 d8 mov %ebx,%eax
|
|
445: 8d 5b 01 lea 0x1(%ebx),%ebx
|
|
}
|
|
while ((x /= base) != 0);
|
|
448: 8b 4d c0 mov -0x40(%ebp),%ecx
|
|
buf[i++] = digits[x % base];
|
|
44b: 88 14 1e mov %dl,(%esi,%ebx,1)
|
|
while ((x /= base) != 0);
|
|
44e: 39 7d c4 cmp %edi,-0x3c(%ebp)
|
|
451: 76 dd jbe 430 <printint+0x30>
|
|
if (neg) {
|
|
453: 8b 4d bc mov -0x44(%ebp),%ecx
|
|
456: 85 c9 test %ecx,%ecx
|
|
458: 74 0c je 466 <printint+0x66>
|
|
buf[i++] = '-';
|
|
45a: c6 44 1d d8 2d movb $0x2d,-0x28(%ebp,%ebx,1)
|
|
buf[i++] = digits[x % base];
|
|
45f: 89 d8 mov %ebx,%eax
|
|
buf[i++] = '-';
|
|
461: ba 2d 00 00 00 mov $0x2d,%edx
|
|
}
|
|
|
|
while (--i >= 0) {
|
|
466: 8b 7d b8 mov -0x48(%ebp),%edi
|
|
469: 8d 5c 05 d7 lea -0x29(%ebp,%eax,1),%ebx
|
|
46d: eb 07 jmp 476 <printint+0x76>
|
|
46f: 90 nop
|
|
putc(fd, buf[i]);
|
|
470: 0f b6 13 movzbl (%ebx),%edx
|
|
473: 83 eb 01 sub $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
476: 83 ec 04 sub $0x4,%esp
|
|
479: 88 55 d7 mov %dl,-0x29(%ebp)
|
|
47c: 6a 01 push $0x1
|
|
47e: 56 push %esi
|
|
47f: 57 push %edi
|
|
480: e8 1e ff ff ff call 3a3 <write>
|
|
while (--i >= 0) {
|
|
485: 83 c4 10 add $0x10,%esp
|
|
488: 39 de cmp %ebx,%esi
|
|
48a: 75 e4 jne 470 <printint+0x70>
|
|
}
|
|
}
|
|
48c: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
48f: 5b pop %ebx
|
|
490: 5e pop %esi
|
|
491: 5f pop %edi
|
|
492: 5d pop %ebp
|
|
493: c3 ret
|
|
494: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
neg = 0;
|
|
498: c7 45 bc 00 00 00 00 movl $0x0,-0x44(%ebp)
|
|
49f: eb 87 jmp 428 <printint+0x28>
|
|
4a1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
4a8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
4af: 90 nop
|
|
|
|
000004b0 <printf>:
|
|
|
|
// Print to the given fd. Only understands %d, %x, %p, %s.
|
|
void printf(int fd, const char *fmt, ...) {
|
|
4b0: 55 push %ebp
|
|
4b1: 89 e5 mov %esp,%ebp
|
|
4b3: 57 push %edi
|
|
4b4: 56 push %esi
|
|
4b5: 53 push %ebx
|
|
4b6: 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++) {
|
|
4b9: 8b 5d 0c mov 0xc(%ebp),%ebx
|
|
void printf(int fd, const char *fmt, ...) {
|
|
4bc: 8b 75 08 mov 0x8(%ebp),%esi
|
|
for (i = 0; fmt[i]; i++) {
|
|
4bf: 0f b6 13 movzbl (%ebx),%edx
|
|
4c2: 84 d2 test %dl,%dl
|
|
4c4: 74 6a je 530 <printf+0x80>
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
4c6: 8d 45 10 lea 0x10(%ebp),%eax
|
|
4c9: 83 c3 01 add $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
4cc: 8d 7d e7 lea -0x19(%ebp),%edi
|
|
state = 0;
|
|
4cf: 31 c9 xor %ecx,%ecx
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
4d1: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
4d4: eb 36 jmp 50c <printf+0x5c>
|
|
4d6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
4dd: 8d 76 00 lea 0x0(%esi),%esi
|
|
4e0: 89 4d d4 mov %ecx,-0x2c(%ebp)
|
|
c = fmt[i] & 0xff;
|
|
if (state == 0) {
|
|
if (c == '%') {
|
|
state = '%';
|
|
4e3: b9 25 00 00 00 mov $0x25,%ecx
|
|
if (c == '%') {
|
|
4e8: 83 f8 25 cmp $0x25,%eax
|
|
4eb: 74 15 je 502 <printf+0x52>
|
|
write(fd, &c, 1);
|
|
4ed: 83 ec 04 sub $0x4,%esp
|
|
4f0: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
4f3: 6a 01 push $0x1
|
|
4f5: 57 push %edi
|
|
4f6: 56 push %esi
|
|
4f7: e8 a7 fe ff ff call 3a3 <write>
|
|
4fc: 8b 4d d4 mov -0x2c(%ebp),%ecx
|
|
}
|
|
else {
|
|
putc(fd, c);
|
|
4ff: 83 c4 10 add $0x10,%esp
|
|
for (i = 0; fmt[i]; i++) {
|
|
502: 0f b6 13 movzbl (%ebx),%edx
|
|
505: 83 c3 01 add $0x1,%ebx
|
|
508: 84 d2 test %dl,%dl
|
|
50a: 74 24 je 530 <printf+0x80>
|
|
c = fmt[i] & 0xff;
|
|
50c: 0f b6 c2 movzbl %dl,%eax
|
|
if (state == 0) {
|
|
50f: 85 c9 test %ecx,%ecx
|
|
511: 74 cd je 4e0 <printf+0x30>
|
|
}
|
|
}
|
|
else if (state == '%') {
|
|
513: 83 f9 25 cmp $0x25,%ecx
|
|
516: 75 ea jne 502 <printf+0x52>
|
|
if (c == 'd') {
|
|
518: 83 f8 25 cmp $0x25,%eax
|
|
51b: 0f 84 07 01 00 00 je 628 <printf+0x178>
|
|
521: 83 e8 63 sub $0x63,%eax
|
|
524: 83 f8 15 cmp $0x15,%eax
|
|
527: 77 17 ja 540 <printf+0x90>
|
|
529: ff 24 85 28 08 00 00 jmp *0x828(,%eax,4)
|
|
putc(fd, c);
|
|
}
|
|
state = 0;
|
|
}
|
|
}
|
|
}
|
|
530: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
533: 5b pop %ebx
|
|
534: 5e pop %esi
|
|
535: 5f pop %edi
|
|
536: 5d pop %ebp
|
|
537: c3 ret
|
|
538: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
53f: 90 nop
|
|
write(fd, &c, 1);
|
|
540: 83 ec 04 sub $0x4,%esp
|
|
543: 88 55 d4 mov %dl,-0x2c(%ebp)
|
|
546: 6a 01 push $0x1
|
|
548: 57 push %edi
|
|
549: 56 push %esi
|
|
54a: c6 45 e7 25 movb $0x25,-0x19(%ebp)
|
|
54e: e8 50 fe ff ff call 3a3 <write>
|
|
putc(fd, c);
|
|
553: 0f b6 55 d4 movzbl -0x2c(%ebp),%edx
|
|
write(fd, &c, 1);
|
|
557: 83 c4 0c add $0xc,%esp
|
|
55a: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
55d: 6a 01 push $0x1
|
|
55f: 57 push %edi
|
|
560: 56 push %esi
|
|
561: e8 3d fe ff ff call 3a3 <write>
|
|
putc(fd, c);
|
|
566: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
569: 31 c9 xor %ecx,%ecx
|
|
56b: eb 95 jmp 502 <printf+0x52>
|
|
56d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 16, 0);
|
|
570: 83 ec 0c sub $0xc,%esp
|
|
573: b9 10 00 00 00 mov $0x10,%ecx
|
|
578: 6a 00 push $0x0
|
|
57a: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
57d: 8b 10 mov (%eax),%edx
|
|
57f: 89 f0 mov %esi,%eax
|
|
581: e8 7a fe ff ff call 400 <printint>
|
|
ap++;
|
|
586: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
58a: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
58d: 31 c9 xor %ecx,%ecx
|
|
58f: e9 6e ff ff ff jmp 502 <printf+0x52>
|
|
594: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
s = (char*)*ap;
|
|
598: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
59b: 8b 10 mov (%eax),%edx
|
|
ap++;
|
|
59d: 83 c0 04 add $0x4,%eax
|
|
5a0: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
if (s == 0) {
|
|
5a3: 85 d2 test %edx,%edx
|
|
5a5: 0f 84 8d 00 00 00 je 638 <printf+0x188>
|
|
while (*s != 0) {
|
|
5ab: 0f b6 02 movzbl (%edx),%eax
|
|
state = 0;
|
|
5ae: 31 c9 xor %ecx,%ecx
|
|
while (*s != 0) {
|
|
5b0: 84 c0 test %al,%al
|
|
5b2: 0f 84 4a ff ff ff je 502 <printf+0x52>
|
|
5b8: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
5bb: 89 d3 mov %edx,%ebx
|
|
5bd: 8d 76 00 lea 0x0(%esi),%esi
|
|
write(fd, &c, 1);
|
|
5c0: 83 ec 04 sub $0x4,%esp
|
|
s++;
|
|
5c3: 83 c3 01 add $0x1,%ebx
|
|
5c6: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
5c9: 6a 01 push $0x1
|
|
5cb: 57 push %edi
|
|
5cc: 56 push %esi
|
|
5cd: e8 d1 fd ff ff call 3a3 <write>
|
|
while (*s != 0) {
|
|
5d2: 0f b6 03 movzbl (%ebx),%eax
|
|
5d5: 83 c4 10 add $0x10,%esp
|
|
5d8: 84 c0 test %al,%al
|
|
5da: 75 e4 jne 5c0 <printf+0x110>
|
|
state = 0;
|
|
5dc: 8b 5d d4 mov -0x2c(%ebp),%ebx
|
|
5df: 31 c9 xor %ecx,%ecx
|
|
5e1: e9 1c ff ff ff jmp 502 <printf+0x52>
|
|
5e6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
5ed: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 10, 1);
|
|
5f0: 83 ec 0c sub $0xc,%esp
|
|
5f3: b9 0a 00 00 00 mov $0xa,%ecx
|
|
5f8: 6a 01 push $0x1
|
|
5fa: e9 7b ff ff ff jmp 57a <printf+0xca>
|
|
5ff: 90 nop
|
|
putc(fd, *ap);
|
|
600: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
write(fd, &c, 1);
|
|
603: 83 ec 04 sub $0x4,%esp
|
|
putc(fd, *ap);
|
|
606: 8b 00 mov (%eax),%eax
|
|
write(fd, &c, 1);
|
|
608: 6a 01 push $0x1
|
|
60a: 57 push %edi
|
|
60b: 56 push %esi
|
|
putc(fd, *ap);
|
|
60c: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
60f: e8 8f fd ff ff call 3a3 <write>
|
|
ap++;
|
|
614: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
618: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
61b: 31 c9 xor %ecx,%ecx
|
|
61d: e9 e0 fe ff ff jmp 502 <printf+0x52>
|
|
622: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
putc(fd, c);
|
|
628: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
62b: 83 ec 04 sub $0x4,%esp
|
|
62e: e9 2a ff ff ff jmp 55d <printf+0xad>
|
|
633: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
637: 90 nop
|
|
s = "(null)";
|
|
638: ba 1f 08 00 00 mov $0x81f,%edx
|
|
while (*s != 0) {
|
|
63d: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
640: b8 28 00 00 00 mov $0x28,%eax
|
|
645: 89 d3 mov %edx,%ebx
|
|
647: e9 74 ff ff ff jmp 5c0 <printf+0x110>
|
|
64c: 66 90 xchg %ax,%ax
|
|
64e: 66 90 xchg %ax,%ax
|
|
|
|
00000650 <free>:
|
|
typedef union header Header;
|
|
|
|
static Header base;
|
|
static Header *freep;
|
|
|
|
void free(void *ap) {
|
|
650: 55 push %ebp
|
|
Header *bp, *p;
|
|
|
|
bp = (Header*)ap - 1;
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
651: a1 34 0b 00 00 mov 0xb34,%eax
|
|
void free(void *ap) {
|
|
656: 89 e5 mov %esp,%ebp
|
|
658: 57 push %edi
|
|
659: 56 push %esi
|
|
65a: 53 push %ebx
|
|
65b: 8b 5d 08 mov 0x8(%ebp),%ebx
|
|
bp = (Header*)ap - 1;
|
|
65e: 8d 4b f8 lea -0x8(%ebx),%ecx
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
661: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
668: 89 c2 mov %eax,%edx
|
|
66a: 8b 00 mov (%eax),%eax
|
|
66c: 39 ca cmp %ecx,%edx
|
|
66e: 73 30 jae 6a0 <free+0x50>
|
|
670: 39 c1 cmp %eax,%ecx
|
|
672: 72 04 jb 678 <free+0x28>
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
674: 39 c2 cmp %eax,%edx
|
|
676: 72 f0 jb 668 <free+0x18>
|
|
break;
|
|
}
|
|
}
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
678: 8b 73 fc mov -0x4(%ebx),%esi
|
|
67b: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
67e: 39 f8 cmp %edi,%eax
|
|
680: 74 30 je 6b2 <free+0x62>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
682: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
}
|
|
else {
|
|
bp->s.ptr = p->s.ptr;
|
|
}
|
|
if (p + p->s.size == bp) {
|
|
685: 8b 42 04 mov 0x4(%edx),%eax
|
|
688: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
68b: 39 f1 cmp %esi,%ecx
|
|
68d: 74 3a je 6c9 <free+0x79>
|
|
p->s.size += bp->s.size;
|
|
p->s.ptr = bp->s.ptr;
|
|
68f: 89 0a mov %ecx,(%edx)
|
|
}
|
|
else {
|
|
p->s.ptr = bp;
|
|
}
|
|
freep = p;
|
|
}
|
|
691: 5b pop %ebx
|
|
freep = p;
|
|
692: 89 15 34 0b 00 00 mov %edx,0xb34
|
|
}
|
|
698: 5e pop %esi
|
|
699: 5f pop %edi
|
|
69a: 5d pop %ebp
|
|
69b: c3 ret
|
|
69c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
6a0: 39 c2 cmp %eax,%edx
|
|
6a2: 72 c4 jb 668 <free+0x18>
|
|
6a4: 39 c1 cmp %eax,%ecx
|
|
6a6: 73 c0 jae 668 <free+0x18>
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
6a8: 8b 73 fc mov -0x4(%ebx),%esi
|
|
6ab: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
6ae: 39 f8 cmp %edi,%eax
|
|
6b0: 75 d0 jne 682 <free+0x32>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
6b2: 03 70 04 add 0x4(%eax),%esi
|
|
6b5: 89 73 fc mov %esi,-0x4(%ebx)
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
6b8: 8b 02 mov (%edx),%eax
|
|
6ba: 8b 00 mov (%eax),%eax
|
|
6bc: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
if (p + p->s.size == bp) {
|
|
6bf: 8b 42 04 mov 0x4(%edx),%eax
|
|
6c2: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
6c5: 39 f1 cmp %esi,%ecx
|
|
6c7: 75 c6 jne 68f <free+0x3f>
|
|
p->s.size += bp->s.size;
|
|
6c9: 03 43 fc add -0x4(%ebx),%eax
|
|
freep = p;
|
|
6cc: 89 15 34 0b 00 00 mov %edx,0xb34
|
|
p->s.size += bp->s.size;
|
|
6d2: 89 42 04 mov %eax,0x4(%edx)
|
|
p->s.ptr = bp->s.ptr;
|
|
6d5: 8b 4b f8 mov -0x8(%ebx),%ecx
|
|
6d8: 89 0a mov %ecx,(%edx)
|
|
}
|
|
6da: 5b pop %ebx
|
|
6db: 5e pop %esi
|
|
6dc: 5f pop %edi
|
|
6dd: 5d pop %ebp
|
|
6de: c3 ret
|
|
6df: 90 nop
|
|
|
|
000006e0 <malloc>:
|
|
hp->s.size = nu;
|
|
free((void*)(hp + 1));
|
|
return freep;
|
|
}
|
|
|
|
void* malloc(uint nbytes) {
|
|
6e0: 55 push %ebp
|
|
6e1: 89 e5 mov %esp,%ebp
|
|
6e3: 57 push %edi
|
|
6e4: 56 push %esi
|
|
6e5: 53 push %ebx
|
|
6e6: 83 ec 1c sub $0x1c,%esp
|
|
Header *p, *prevp;
|
|
uint nunits;
|
|
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
6e9: 8b 45 08 mov 0x8(%ebp),%eax
|
|
if ((prevp = freep) == 0) {
|
|
6ec: 8b 3d 34 0b 00 00 mov 0xb34,%edi
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
6f2: 8d 70 07 lea 0x7(%eax),%esi
|
|
6f5: c1 ee 03 shr $0x3,%esi
|
|
6f8: 83 c6 01 add $0x1,%esi
|
|
if ((prevp = freep) == 0) {
|
|
6fb: 85 ff test %edi,%edi
|
|
6fd: 0f 84 9d 00 00 00 je 7a0 <malloc+0xc0>
|
|
base.s.ptr = freep = prevp = &base;
|
|
base.s.size = 0;
|
|
}
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
703: 8b 17 mov (%edi),%edx
|
|
if (p->s.size >= nunits) {
|
|
705: 8b 4a 04 mov 0x4(%edx),%ecx
|
|
708: 39 f1 cmp %esi,%ecx
|
|
70a: 73 6a jae 776 <malloc+0x96>
|
|
70c: bb 00 10 00 00 mov $0x1000,%ebx
|
|
711: 39 de cmp %ebx,%esi
|
|
713: 0f 43 de cmovae %esi,%ebx
|
|
p = sbrk(nu * sizeof(Header));
|
|
716: 8d 04 dd 00 00 00 00 lea 0x0(,%ebx,8),%eax
|
|
71d: 89 45 e4 mov %eax,-0x1c(%ebp)
|
|
720: eb 17 jmp 739 <malloc+0x59>
|
|
722: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
728: 8b 02 mov (%edx),%eax
|
|
if (p->s.size >= nunits) {
|
|
72a: 8b 48 04 mov 0x4(%eax),%ecx
|
|
72d: 39 f1 cmp %esi,%ecx
|
|
72f: 73 4f jae 780 <malloc+0xa0>
|
|
p->s.size = nunits;
|
|
}
|
|
freep = prevp;
|
|
return (void*)(p + 1);
|
|
}
|
|
if (p == freep) {
|
|
731: 8b 3d 34 0b 00 00 mov 0xb34,%edi
|
|
737: 89 c2 mov %eax,%edx
|
|
739: 39 d7 cmp %edx,%edi
|
|
73b: 75 eb jne 728 <malloc+0x48>
|
|
p = sbrk(nu * sizeof(Header));
|
|
73d: 83 ec 0c sub $0xc,%esp
|
|
740: ff 75 e4 push -0x1c(%ebp)
|
|
743: e8 3b fc ff ff call 383 <sbrk>
|
|
if (p == (char*)-1) {
|
|
748: 83 c4 10 add $0x10,%esp
|
|
74b: 83 f8 ff cmp $0xffffffff,%eax
|
|
74e: 74 1c je 76c <malloc+0x8c>
|
|
hp->s.size = nu;
|
|
750: 89 58 04 mov %ebx,0x4(%eax)
|
|
free((void*)(hp + 1));
|
|
753: 83 ec 0c sub $0xc,%esp
|
|
756: 83 c0 08 add $0x8,%eax
|
|
759: 50 push %eax
|
|
75a: e8 f1 fe ff ff call 650 <free>
|
|
return freep;
|
|
75f: 8b 15 34 0b 00 00 mov 0xb34,%edx
|
|
if ((p = morecore(nunits)) == 0) {
|
|
765: 83 c4 10 add $0x10,%esp
|
|
768: 85 d2 test %edx,%edx
|
|
76a: 75 bc jne 728 <malloc+0x48>
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
76c: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return 0;
|
|
76f: 31 c0 xor %eax,%eax
|
|
}
|
|
771: 5b pop %ebx
|
|
772: 5e pop %esi
|
|
773: 5f pop %edi
|
|
774: 5d pop %ebp
|
|
775: c3 ret
|
|
if (p->s.size >= nunits) {
|
|
776: 89 d0 mov %edx,%eax
|
|
778: 89 fa mov %edi,%edx
|
|
77a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
if (p->s.size == nunits) {
|
|
780: 39 ce cmp %ecx,%esi
|
|
782: 74 4c je 7d0 <malloc+0xf0>
|
|
p->s.size -= nunits;
|
|
784: 29 f1 sub %esi,%ecx
|
|
786: 89 48 04 mov %ecx,0x4(%eax)
|
|
p += p->s.size;
|
|
789: 8d 04 c8 lea (%eax,%ecx,8),%eax
|
|
p->s.size = nunits;
|
|
78c: 89 70 04 mov %esi,0x4(%eax)
|
|
freep = prevp;
|
|
78f: 89 15 34 0b 00 00 mov %edx,0xb34
|
|
}
|
|
795: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return (void*)(p + 1);
|
|
798: 83 c0 08 add $0x8,%eax
|
|
}
|
|
79b: 5b pop %ebx
|
|
79c: 5e pop %esi
|
|
79d: 5f pop %edi
|
|
79e: 5d pop %ebp
|
|
79f: c3 ret
|
|
base.s.ptr = freep = prevp = &base;
|
|
7a0: c7 05 34 0b 00 00 38 movl $0xb38,0xb34
|
|
7a7: 0b 00 00
|
|
base.s.size = 0;
|
|
7aa: bf 38 0b 00 00 mov $0xb38,%edi
|
|
base.s.ptr = freep = prevp = &base;
|
|
7af: c7 05 38 0b 00 00 38 movl $0xb38,0xb38
|
|
7b6: 0b 00 00
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
7b9: 89 fa mov %edi,%edx
|
|
base.s.size = 0;
|
|
7bb: c7 05 3c 0b 00 00 00 movl $0x0,0xb3c
|
|
7c2: 00 00 00
|
|
if (p->s.size >= nunits) {
|
|
7c5: e9 42 ff ff ff jmp 70c <malloc+0x2c>
|
|
7ca: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
prevp->s.ptr = p->s.ptr;
|
|
7d0: 8b 08 mov (%eax),%ecx
|
|
7d2: 89 0a mov %ecx,(%edx)
|
|
7d4: eb b9 jmp 78f <malloc+0xaf>
|