1257 lines
43 KiB
NASM
1257 lines
43 KiB
NASM
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_cat: file format elf32-i386
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Disassembly of section .text:
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00000000 <main>:
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printf(1, "cat: read error\n");
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exit();
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}
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}
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int main(int argc, char *argv[]) {
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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: 57 push %edi
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e: 56 push %esi
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f: be 01 00 00 00 mov $0x1,%esi
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14: 53 push %ebx
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15: 51 push %ecx
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16: 83 ec 18 sub $0x18,%esp
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19: 8b 01 mov (%ecx),%eax
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1b: 8b 59 04 mov 0x4(%ecx),%ebx
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1e: 89 45 e4 mov %eax,-0x1c(%ebp)
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21: 83 c3 04 add $0x4,%ebx
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int fd, i;
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if (argc <= 1) {
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24: 83 f8 01 cmp $0x1,%eax
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27: 7e 54 jle 7d <main+0x7d>
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29: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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cat(0);
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exit();
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}
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for (i = 1; i < argc; i++) {
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if ((fd = open(argv[i], 0)) < 0) {
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30: 83 ec 08 sub $0x8,%esp
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33: 6a 00 push $0x0
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35: ff 33 push (%ebx)
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37: e8 8f 03 00 00 call 3cb <open>
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3c: 83 c4 10 add $0x10,%esp
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3f: 89 c7 mov %eax,%edi
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41: 85 c0 test %eax,%eax
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43: 78 24 js 69 <main+0x69>
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printf(1, "cat: cannot open %s\n", argv[i]);
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exit();
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}
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cat(fd);
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45: 83 ec 0c sub $0xc,%esp
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for (i = 1; i < argc; i++) {
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48: 83 c6 01 add $0x1,%esi
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4b: 83 c3 04 add $0x4,%ebx
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cat(fd);
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4e: 50 push %eax
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4f: e8 3c 00 00 00 call 90 <cat>
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close(fd);
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54: 89 3c 24 mov %edi,(%esp)
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57: e8 9f 03 00 00 call 3fb <close>
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for (i = 1; i < argc; i++) {
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5c: 83 c4 10 add $0x10,%esp
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5f: 39 75 e4 cmp %esi,-0x1c(%ebp)
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62: 75 cc jne 30 <main+0x30>
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}
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exit();
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64: e8 fa 02 00 00 call 363 <exit>
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printf(1, "cat: cannot open %s\n", argv[i]);
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69: 50 push %eax
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6a: ff 33 push (%ebx)
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6c: 68 1b 08 00 00 push $0x81b
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71: 6a 01 push $0x1
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73: e8 58 04 00 00 call 4d0 <printf>
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exit();
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78: e8 e6 02 00 00 call 363 <exit>
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cat(0);
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7d: 83 ec 0c sub $0xc,%esp
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80: 6a 00 push $0x0
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82: e8 09 00 00 00 call 90 <cat>
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exit();
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87: e8 d7 02 00 00 call 363 <exit>
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8c: 66 90 xchg %ax,%ax
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8e: 66 90 xchg %ax,%ax
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00000090 <cat>:
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void cat(int fd) {
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90: 55 push %ebp
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91: 89 e5 mov %esp,%ebp
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93: 56 push %esi
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94: 8b 75 08 mov 0x8(%ebp),%esi
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97: 53 push %ebx
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while ((n = read(fd, buf, sizeof(buf))) > 0) {
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98: eb 1d jmp b7 <cat+0x27>
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9a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
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if (write(1, buf, n) != n) {
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a0: 83 ec 04 sub $0x4,%esp
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a3: 53 push %ebx
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a4: 68 80 0b 00 00 push $0xb80
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a9: 6a 01 push $0x1
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ab: e8 23 03 00 00 call 3d3 <write>
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b0: 83 c4 10 add $0x10,%esp
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b3: 39 d8 cmp %ebx,%eax
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b5: 75 25 jne dc <cat+0x4c>
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while ((n = read(fd, buf, sizeof(buf))) > 0) {
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b7: 83 ec 04 sub $0x4,%esp
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ba: 68 00 02 00 00 push $0x200
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bf: 68 80 0b 00 00 push $0xb80
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c4: 56 push %esi
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c5: e8 b1 02 00 00 call 37b <read>
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ca: 83 c4 10 add $0x10,%esp
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cd: 89 c3 mov %eax,%ebx
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cf: 85 c0 test %eax,%eax
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d1: 7f cd jg a0 <cat+0x10>
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if (n < 0) {
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d3: 75 1b jne f0 <cat+0x60>
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}
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d5: 8d 65 f8 lea -0x8(%ebp),%esp
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d8: 5b pop %ebx
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d9: 5e pop %esi
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da: 5d pop %ebp
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db: c3 ret
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printf(1, "cat: write error\n");
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dc: 83 ec 08 sub $0x8,%esp
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df: 68 f8 07 00 00 push $0x7f8
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e4: 6a 01 push $0x1
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e6: e8 e5 03 00 00 call 4d0 <printf>
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exit();
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eb: e8 73 02 00 00 call 363 <exit>
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printf(1, "cat: read error\n");
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f0: 50 push %eax
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f1: 50 push %eax
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f2: 68 0a 08 00 00 push $0x80a
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f7: 6a 01 push $0x1
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f9: e8 d2 03 00 00 call 4d0 <printf>
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exit();
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fe: e8 60 02 00 00 call 363 <exit>
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103: 66 90 xchg %ax,%ax
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105: 66 90 xchg %ax,%ax
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107: 66 90 xchg %ax,%ax
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109: 66 90 xchg %ax,%ax
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10b: 66 90 xchg %ax,%ax
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10d: 66 90 xchg %ax,%ax
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10f: 90 nop
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00000110 <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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110: 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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111: 31 c0 xor %eax,%eax
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char*strcpy(char *s, const char *t) {
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113: 89 e5 mov %esp,%ebp
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115: 53 push %ebx
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116: 8b 4d 08 mov 0x8(%ebp),%ecx
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119: 8b 5d 0c mov 0xc(%ebp),%ebx
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11c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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while ((*s++ = *t++) != 0) {
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120: 0f b6 14 03 movzbl (%ebx,%eax,1),%edx
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124: 88 14 01 mov %dl,(%ecx,%eax,1)
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127: 83 c0 01 add $0x1,%eax
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12a: 84 d2 test %dl,%dl
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12c: 75 f2 jne 120 <strcpy+0x10>
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;
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}
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return os;
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}
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12e: 8b 5d fc mov -0x4(%ebp),%ebx
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131: 89 c8 mov %ecx,%eax
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133: c9 leave
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134: c3 ret
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135: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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13c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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00000140 <strcmp>:
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int strcmp(const char *p, const char *q) {
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140: 55 push %ebp
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141: 89 e5 mov %esp,%ebp
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143: 53 push %ebx
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144: 8b 55 08 mov 0x8(%ebp),%edx
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147: 8b 4d 0c mov 0xc(%ebp),%ecx
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while (*p && *p == *q) {
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14a: 0f b6 02 movzbl (%edx),%eax
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14d: 84 c0 test %al,%al
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14f: 75 17 jne 168 <strcmp+0x28>
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151: eb 3a jmp 18d <strcmp+0x4d>
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153: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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157: 90 nop
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158: 0f b6 42 01 movzbl 0x1(%edx),%eax
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p++, q++;
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15c: 83 c2 01 add $0x1,%edx
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15f: 8d 59 01 lea 0x1(%ecx),%ebx
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while (*p && *p == *q) {
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162: 84 c0 test %al,%al
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164: 74 1a je 180 <strcmp+0x40>
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p++, q++;
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166: 89 d9 mov %ebx,%ecx
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while (*p && *p == *q) {
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168: 0f b6 19 movzbl (%ecx),%ebx
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16b: 38 c3 cmp %al,%bl
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16d: 74 e9 je 158 <strcmp+0x18>
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}
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return (uchar) * p - (uchar) * q;
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16f: 29 d8 sub %ebx,%eax
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}
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171: 8b 5d fc mov -0x4(%ebp),%ebx
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174: c9 leave
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175: c3 ret
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176: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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17d: 8d 76 00 lea 0x0(%esi),%esi
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return (uchar) * p - (uchar) * q;
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180: 0f b6 59 01 movzbl 0x1(%ecx),%ebx
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184: 31 c0 xor %eax,%eax
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186: 29 d8 sub %ebx,%eax
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}
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188: 8b 5d fc mov -0x4(%ebp),%ebx
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18b: c9 leave
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18c: c3 ret
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return (uchar) * p - (uchar) * q;
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18d: 0f b6 19 movzbl (%ecx),%ebx
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190: 31 c0 xor %eax,%eax
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192: eb db jmp 16f <strcmp+0x2f>
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194: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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19b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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19f: 90 nop
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000001a0 <strlen>:
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uint strlen(const char *s) {
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1a0: 55 push %ebp
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1a1: 89 e5 mov %esp,%ebp
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1a3: 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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1a6: 80 3a 00 cmpb $0x0,(%edx)
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1a9: 74 15 je 1c0 <strlen+0x20>
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1ab: 31 c0 xor %eax,%eax
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1ad: 8d 76 00 lea 0x0(%esi),%esi
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1b0: 83 c0 01 add $0x1,%eax
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1b3: 80 3c 02 00 cmpb $0x0,(%edx,%eax,1)
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1b7: 89 c1 mov %eax,%ecx
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1b9: 75 f5 jne 1b0 <strlen+0x10>
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;
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}
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return n;
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}
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1bb: 89 c8 mov %ecx,%eax
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1bd: 5d pop %ebp
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1be: c3 ret
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1bf: 90 nop
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for (n = 0; s[n]; n++) {
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1c0: 31 c9 xor %ecx,%ecx
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}
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1c2: 5d pop %ebp
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1c3: 89 c8 mov %ecx,%eax
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1c5: c3 ret
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1c6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1cd: 8d 76 00 lea 0x0(%esi),%esi
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000001d0 <memset>:
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void* memset(void *dst, int c, uint n) {
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1d0: 55 push %ebp
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1d1: 89 e5 mov %esp,%ebp
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1d3: 57 push %edi
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1d4: 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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1d7: 8b 4d 10 mov 0x10(%ebp),%ecx
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1da: 8b 45 0c mov 0xc(%ebp),%eax
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1dd: 89 d7 mov %edx,%edi
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1df: fc cld
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1e0: 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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1e2: 8b 7d fc mov -0x4(%ebp),%edi
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1e5: 89 d0 mov %edx,%eax
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1e7: c9 leave
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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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000001f0 <strchr>:
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char* strchr(const char *s, char c) {
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1f0: 55 push %ebp
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1f1: 89 e5 mov %esp,%ebp
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1f3: 8b 45 08 mov 0x8(%ebp),%eax
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1f6: 0f b6 4d 0c movzbl 0xc(%ebp),%ecx
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for (; *s; s++) {
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1fa: 0f b6 10 movzbl (%eax),%edx
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1fd: 84 d2 test %dl,%dl
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1ff: 75 12 jne 213 <strchr+0x23>
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201: eb 1d jmp 220 <strchr+0x30>
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203: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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207: 90 nop
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208: 0f b6 50 01 movzbl 0x1(%eax),%edx
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20c: 83 c0 01 add $0x1,%eax
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20f: 84 d2 test %dl,%dl
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211: 74 0d je 220 <strchr+0x30>
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if (*s == c) {
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213: 38 d1 cmp %dl,%cl
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215: 75 f1 jne 208 <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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217: 5d pop %ebp
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218: c3 ret
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219: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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return 0;
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220: 31 c0 xor %eax,%eax
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}
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222: 5d pop %ebp
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223: c3 ret
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224: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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22b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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22f: 90 nop
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00000230 <gets>:
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char* gets(char *buf, int max) {
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230: 55 push %ebp
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231: 89 e5 mov %esp,%ebp
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233: 57 push %edi
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234: 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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235: 8d 7d e7 lea -0x19(%ebp),%edi
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char* gets(char *buf, int max) {
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238: 53 push %ebx
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for (i = 0; i + 1 < max;) {
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239: 31 db xor %ebx,%ebx
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char* gets(char *buf, int max) {
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23b: 83 ec 1c sub $0x1c,%esp
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for (i = 0; i + 1 < max;) {
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23e: eb 27 jmp 267 <gets+0x37>
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cc = read(0, &c, 1);
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240: 83 ec 04 sub $0x4,%esp
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243: 6a 01 push $0x1
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245: 57 push %edi
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246: 6a 00 push $0x0
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248: e8 2e 01 00 00 call 37b <read>
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if (cc < 1) {
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24d: 83 c4 10 add $0x10,%esp
|
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250: 85 c0 test %eax,%eax
|
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252: 7e 1d jle 271 <gets+0x41>
|
|
break;
|
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}
|
|
buf[i++] = c;
|
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254: 0f b6 45 e7 movzbl -0x19(%ebp),%eax
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258: 8b 55 08 mov 0x8(%ebp),%edx
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25b: 88 44 1a ff mov %al,-0x1(%edx,%ebx,1)
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if (c == '\n' || c == '\r') {
|
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25f: 3c 0a cmp $0xa,%al
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261: 74 1d je 280 <gets+0x50>
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263: 3c 0d cmp $0xd,%al
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|
265: 74 19 je 280 <gets+0x50>
|
|
for (i = 0; i + 1 < max;) {
|
|
267: 89 de mov %ebx,%esi
|
|
269: 83 c3 01 add $0x1,%ebx
|
|
26c: 3b 5d 0c cmp 0xc(%ebp),%ebx
|
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26f: 7c cf jl 240 <gets+0x10>
|
|
break;
|
|
}
|
|
}
|
|
buf[i] = '\0';
|
|
271: 8b 45 08 mov 0x8(%ebp),%eax
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274: c6 04 30 00 movb $0x0,(%eax,%esi,1)
|
|
return buf;
|
|
}
|
|
278: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
27b: 5b pop %ebx
|
|
27c: 5e pop %esi
|
|
27d: 5f pop %edi
|
|
27e: 5d pop %ebp
|
|
27f: c3 ret
|
|
buf[i] = '\0';
|
|
280: 8b 45 08 mov 0x8(%ebp),%eax
|
|
283: 89 de mov %ebx,%esi
|
|
285: c6 04 30 00 movb $0x0,(%eax,%esi,1)
|
|
}
|
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289: 8d 65 f4 lea -0xc(%ebp),%esp
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|
28c: 5b pop %ebx
|
|
28d: 5e pop %esi
|
|
28e: 5f pop %edi
|
|
28f: 5d pop %ebp
|
|
290: c3 ret
|
|
291: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
298: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
29f: 90 nop
|
|
|
|
000002a0 <stat>:
|
|
|
|
int stat(const char *n, struct stat *st) {
|
|
2a0: 55 push %ebp
|
|
2a1: 89 e5 mov %esp,%ebp
|
|
2a3: 56 push %esi
|
|
2a4: 53 push %ebx
|
|
int fd;
|
|
int r;
|
|
|
|
fd = open(n, O_RDONLY);
|
|
2a5: 83 ec 08 sub $0x8,%esp
|
|
2a8: 6a 00 push $0x0
|
|
2aa: ff 75 08 push 0x8(%ebp)
|
|
2ad: e8 19 01 00 00 call 3cb <open>
|
|
if (fd < 0) {
|
|
2b2: 83 c4 10 add $0x10,%esp
|
|
2b5: 85 c0 test %eax,%eax
|
|
2b7: 78 27 js 2e0 <stat+0x40>
|
|
return -1;
|
|
}
|
|
r = fstat(fd, st);
|
|
2b9: 83 ec 08 sub $0x8,%esp
|
|
2bc: ff 75 0c push 0xc(%ebp)
|
|
2bf: 89 c3 mov %eax,%ebx
|
|
2c1: 50 push %eax
|
|
2c2: e8 cc 00 00 00 call 393 <fstat>
|
|
close(fd);
|
|
2c7: 89 1c 24 mov %ebx,(%esp)
|
|
r = fstat(fd, st);
|
|
2ca: 89 c6 mov %eax,%esi
|
|
close(fd);
|
|
2cc: e8 2a 01 00 00 call 3fb <close>
|
|
return r;
|
|
2d1: 83 c4 10 add $0x10,%esp
|
|
}
|
|
2d4: 8d 65 f8 lea -0x8(%ebp),%esp
|
|
2d7: 89 f0 mov %esi,%eax
|
|
2d9: 5b pop %ebx
|
|
2da: 5e pop %esi
|
|
2db: 5d pop %ebp
|
|
2dc: c3 ret
|
|
2dd: 8d 76 00 lea 0x0(%esi),%esi
|
|
return -1;
|
|
2e0: be ff ff ff ff mov $0xffffffff,%esi
|
|
2e5: eb ed jmp 2d4 <stat+0x34>
|
|
2e7: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
2ee: 66 90 xchg %ax,%ax
|
|
|
|
000002f0 <atoi>:
|
|
|
|
int atoi(const char *s) {
|
|
2f0: 55 push %ebp
|
|
2f1: 89 e5 mov %esp,%ebp
|
|
2f3: 53 push %ebx
|
|
2f4: 8b 55 08 mov 0x8(%ebp),%edx
|
|
int n;
|
|
|
|
n = 0;
|
|
while ('0' <= *s && *s <= '9') {
|
|
2f7: 0f be 02 movsbl (%edx),%eax
|
|
2fa: 8d 48 d0 lea -0x30(%eax),%ecx
|
|
2fd: 80 f9 09 cmp $0x9,%cl
|
|
n = 0;
|
|
300: b9 00 00 00 00 mov $0x0,%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
305: 77 1e ja 325 <atoi+0x35>
|
|
307: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
30e: 66 90 xchg %ax,%ax
|
|
n = n * 10 + *s++ - '0';
|
|
310: 83 c2 01 add $0x1,%edx
|
|
313: 8d 0c 89 lea (%ecx,%ecx,4),%ecx
|
|
316: 8d 4c 48 d0 lea -0x30(%eax,%ecx,2),%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
31a: 0f be 02 movsbl (%edx),%eax
|
|
31d: 8d 58 d0 lea -0x30(%eax),%ebx
|
|
320: 80 fb 09 cmp $0x9,%bl
|
|
323: 76 eb jbe 310 <atoi+0x20>
|
|
}
|
|
return n;
|
|
}
|
|
325: 8b 5d fc mov -0x4(%ebp),%ebx
|
|
328: 89 c8 mov %ecx,%eax
|
|
32a: c9 leave
|
|
32b: c3 ret
|
|
32c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
|
|
00000330 <memmove>:
|
|
|
|
void* memmove(void *vdst, const void *vsrc, int n) {
|
|
330: 55 push %ebp
|
|
331: 89 e5 mov %esp,%ebp
|
|
333: 57 push %edi
|
|
334: 8b 45 10 mov 0x10(%ebp),%eax
|
|
337: 8b 55 08 mov 0x8(%ebp),%edx
|
|
33a: 56 push %esi
|
|
33b: 8b 75 0c mov 0xc(%ebp),%esi
|
|
char *dst;
|
|
const char *src;
|
|
|
|
dst = vdst;
|
|
src = vsrc;
|
|
while (n-- > 0) {
|
|
33e: 85 c0 test %eax,%eax
|
|
340: 7e 13 jle 355 <memmove+0x25>
|
|
342: 01 d0 add %edx,%eax
|
|
dst = vdst;
|
|
344: 89 d7 mov %edx,%edi
|
|
346: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
34d: 8d 76 00 lea 0x0(%esi),%esi
|
|
*dst++ = *src++;
|
|
350: a4 movsb %ds:(%esi),%es:(%edi)
|
|
while (n-- > 0) {
|
|
351: 39 f8 cmp %edi,%eax
|
|
353: 75 fb jne 350 <memmove+0x20>
|
|
}
|
|
return vdst;
|
|
}
|
|
355: 5e pop %esi
|
|
356: 89 d0 mov %edx,%eax
|
|
358: 5f pop %edi
|
|
359: 5d pop %ebp
|
|
35a: c3 ret
|
|
|
|
0000035b <fork>:
|
|
name: \
|
|
movl $SYS_ ## name, %eax; \
|
|
int $T_SYSCALL; \
|
|
ret
|
|
|
|
SYSCALL(fork)
|
|
35b: b8 01 00 00 00 mov $0x1,%eax
|
|
360: cd 40 int $0x40
|
|
362: c3 ret
|
|
|
|
00000363 <exit>:
|
|
SYSCALL(exit)
|
|
363: b8 02 00 00 00 mov $0x2,%eax
|
|
368: cd 40 int $0x40
|
|
36a: c3 ret
|
|
|
|
0000036b <wait>:
|
|
SYSCALL(wait)
|
|
36b: b8 03 00 00 00 mov $0x3,%eax
|
|
370: cd 40 int $0x40
|
|
372: c3 ret
|
|
|
|
00000373 <pipe>:
|
|
SYSCALL(pipe)
|
|
373: b8 04 00 00 00 mov $0x4,%eax
|
|
378: cd 40 int $0x40
|
|
37a: c3 ret
|
|
|
|
0000037b <read>:
|
|
SYSCALL(read)
|
|
37b: b8 05 00 00 00 mov $0x5,%eax
|
|
380: cd 40 int $0x40
|
|
382: c3 ret
|
|
|
|
00000383 <kill>:
|
|
SYSCALL(kill)
|
|
383: b8 06 00 00 00 mov $0x6,%eax
|
|
388: cd 40 int $0x40
|
|
38a: c3 ret
|
|
|
|
0000038b <exec>:
|
|
SYSCALL(exec)
|
|
38b: b8 07 00 00 00 mov $0x7,%eax
|
|
390: cd 40 int $0x40
|
|
392: c3 ret
|
|
|
|
00000393 <fstat>:
|
|
SYSCALL(fstat)
|
|
393: b8 08 00 00 00 mov $0x8,%eax
|
|
398: cd 40 int $0x40
|
|
39a: c3 ret
|
|
|
|
0000039b <chdir>:
|
|
SYSCALL(chdir)
|
|
39b: b8 09 00 00 00 mov $0x9,%eax
|
|
3a0: cd 40 int $0x40
|
|
3a2: c3 ret
|
|
|
|
000003a3 <dup>:
|
|
SYSCALL(dup)
|
|
3a3: b8 0a 00 00 00 mov $0xa,%eax
|
|
3a8: cd 40 int $0x40
|
|
3aa: c3 ret
|
|
|
|
000003ab <getpid>:
|
|
SYSCALL(getpid)
|
|
3ab: b8 0b 00 00 00 mov $0xb,%eax
|
|
3b0: cd 40 int $0x40
|
|
3b2: c3 ret
|
|
|
|
000003b3 <sbrk>:
|
|
SYSCALL(sbrk)
|
|
3b3: b8 0c 00 00 00 mov $0xc,%eax
|
|
3b8: cd 40 int $0x40
|
|
3ba: c3 ret
|
|
|
|
000003bb <sleep>:
|
|
SYSCALL(sleep)
|
|
3bb: b8 0d 00 00 00 mov $0xd,%eax
|
|
3c0: cd 40 int $0x40
|
|
3c2: c3 ret
|
|
|
|
000003c3 <uptime>:
|
|
SYSCALL(uptime)
|
|
3c3: b8 0e 00 00 00 mov $0xe,%eax
|
|
3c8: cd 40 int $0x40
|
|
3ca: c3 ret
|
|
|
|
000003cb <open>:
|
|
SYSCALL(open)
|
|
3cb: b8 0f 00 00 00 mov $0xf,%eax
|
|
3d0: cd 40 int $0x40
|
|
3d2: c3 ret
|
|
|
|
000003d3 <write>:
|
|
SYSCALL(write)
|
|
3d3: b8 10 00 00 00 mov $0x10,%eax
|
|
3d8: cd 40 int $0x40
|
|
3da: c3 ret
|
|
|
|
000003db <mknod>:
|
|
SYSCALL(mknod)
|
|
3db: b8 11 00 00 00 mov $0x11,%eax
|
|
3e0: cd 40 int $0x40
|
|
3e2: c3 ret
|
|
|
|
000003e3 <unlink>:
|
|
SYSCALL(unlink)
|
|
3e3: b8 12 00 00 00 mov $0x12,%eax
|
|
3e8: cd 40 int $0x40
|
|
3ea: c3 ret
|
|
|
|
000003eb <link>:
|
|
SYSCALL(link)
|
|
3eb: b8 13 00 00 00 mov $0x13,%eax
|
|
3f0: cd 40 int $0x40
|
|
3f2: c3 ret
|
|
|
|
000003f3 <mkdir>:
|
|
SYSCALL(mkdir)
|
|
3f3: b8 14 00 00 00 mov $0x14,%eax
|
|
3f8: cd 40 int $0x40
|
|
3fa: c3 ret
|
|
|
|
000003fb <close>:
|
|
SYSCALL(close)
|
|
3fb: b8 15 00 00 00 mov $0x15,%eax
|
|
400: cd 40 int $0x40
|
|
402: c3 ret
|
|
|
|
00000403 <getch>:
|
|
SYSCALL(getch)
|
|
403: b8 16 00 00 00 mov $0x16,%eax
|
|
408: cd 40 int $0x40
|
|
40a: c3 ret
|
|
|
|
0000040b <greeting>:
|
|
SYSCALL(greeting)
|
|
40b: b8 17 00 00 00 mov $0x17,%eax
|
|
410: cd 40 int $0x40
|
|
412: c3 ret
|
|
|
|
00000413 <shutdown>:
|
|
SYSCALL(shutdown)
|
|
413: b8 18 00 00 00 mov $0x18,%eax
|
|
418: cd 40 int $0x40
|
|
41a: c3 ret
|
|
41b: 66 90 xchg %ax,%ax
|
|
41d: 66 90 xchg %ax,%ax
|
|
41f: 90 nop
|
|
|
|
00000420 <printint>:
|
|
|
|
static void putc(int fd, char c) {
|
|
write(fd, &c, 1);
|
|
}
|
|
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
420: 55 push %ebp
|
|
421: 89 e5 mov %esp,%ebp
|
|
423: 57 push %edi
|
|
424: 56 push %esi
|
|
425: 53 push %ebx
|
|
426: 83 ec 3c sub $0x3c,%esp
|
|
429: 89 4d c4 mov %ecx,-0x3c(%ebp)
|
|
uint x;
|
|
|
|
neg = 0;
|
|
if (sgn && xx < 0) {
|
|
neg = 1;
|
|
x = -xx;
|
|
42c: 89 d1 mov %edx,%ecx
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
42e: 89 45 b8 mov %eax,-0x48(%ebp)
|
|
if (sgn && xx < 0) {
|
|
431: 85 d2 test %edx,%edx
|
|
433: 0f 89 7f 00 00 00 jns 4b8 <printint+0x98>
|
|
439: f6 45 08 01 testb $0x1,0x8(%ebp)
|
|
43d: 74 79 je 4b8 <printint+0x98>
|
|
neg = 1;
|
|
43f: c7 45 bc 01 00 00 00 movl $0x1,-0x44(%ebp)
|
|
x = -xx;
|
|
446: f7 d9 neg %ecx
|
|
}
|
|
else {
|
|
x = xx;
|
|
}
|
|
|
|
i = 0;
|
|
448: 31 db xor %ebx,%ebx
|
|
44a: 8d 75 d7 lea -0x29(%ebp),%esi
|
|
44d: 8d 76 00 lea 0x0(%esi),%esi
|
|
do {
|
|
buf[i++] = digits[x % base];
|
|
450: 89 c8 mov %ecx,%eax
|
|
452: 31 d2 xor %edx,%edx
|
|
454: 89 cf mov %ecx,%edi
|
|
456: f7 75 c4 divl -0x3c(%ebp)
|
|
459: 0f b6 92 90 08 00 00 movzbl 0x890(%edx),%edx
|
|
460: 89 45 c0 mov %eax,-0x40(%ebp)
|
|
463: 89 d8 mov %ebx,%eax
|
|
465: 8d 5b 01 lea 0x1(%ebx),%ebx
|
|
}
|
|
while ((x /= base) != 0);
|
|
468: 8b 4d c0 mov -0x40(%ebp),%ecx
|
|
buf[i++] = digits[x % base];
|
|
46b: 88 14 1e mov %dl,(%esi,%ebx,1)
|
|
while ((x /= base) != 0);
|
|
46e: 39 7d c4 cmp %edi,-0x3c(%ebp)
|
|
471: 76 dd jbe 450 <printint+0x30>
|
|
if (neg) {
|
|
473: 8b 4d bc mov -0x44(%ebp),%ecx
|
|
476: 85 c9 test %ecx,%ecx
|
|
478: 74 0c je 486 <printint+0x66>
|
|
buf[i++] = '-';
|
|
47a: c6 44 1d d8 2d movb $0x2d,-0x28(%ebp,%ebx,1)
|
|
buf[i++] = digits[x % base];
|
|
47f: 89 d8 mov %ebx,%eax
|
|
buf[i++] = '-';
|
|
481: ba 2d 00 00 00 mov $0x2d,%edx
|
|
}
|
|
|
|
while (--i >= 0) {
|
|
486: 8b 7d b8 mov -0x48(%ebp),%edi
|
|
489: 8d 5c 05 d7 lea -0x29(%ebp,%eax,1),%ebx
|
|
48d: eb 07 jmp 496 <printint+0x76>
|
|
48f: 90 nop
|
|
putc(fd, buf[i]);
|
|
490: 0f b6 13 movzbl (%ebx),%edx
|
|
493: 83 eb 01 sub $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
496: 83 ec 04 sub $0x4,%esp
|
|
499: 88 55 d7 mov %dl,-0x29(%ebp)
|
|
49c: 6a 01 push $0x1
|
|
49e: 56 push %esi
|
|
49f: 57 push %edi
|
|
4a0: e8 2e ff ff ff call 3d3 <write>
|
|
while (--i >= 0) {
|
|
4a5: 83 c4 10 add $0x10,%esp
|
|
4a8: 39 de cmp %ebx,%esi
|
|
4aa: 75 e4 jne 490 <printint+0x70>
|
|
}
|
|
}
|
|
4ac: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
4af: 5b pop %ebx
|
|
4b0: 5e pop %esi
|
|
4b1: 5f pop %edi
|
|
4b2: 5d pop %ebp
|
|
4b3: c3 ret
|
|
4b4: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
neg = 0;
|
|
4b8: c7 45 bc 00 00 00 00 movl $0x0,-0x44(%ebp)
|
|
4bf: eb 87 jmp 448 <printint+0x28>
|
|
4c1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
4c8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
4cf: 90 nop
|
|
|
|
000004d0 <printf>:
|
|
|
|
// Print to the given fd. Only understands %d, %x, %p, %s.
|
|
void printf(int fd, const char *fmt, ...) {
|
|
4d0: 55 push %ebp
|
|
4d1: 89 e5 mov %esp,%ebp
|
|
4d3: 57 push %edi
|
|
4d4: 56 push %esi
|
|
4d5: 53 push %ebx
|
|
4d6: 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++) {
|
|
4d9: 8b 5d 0c mov 0xc(%ebp),%ebx
|
|
void printf(int fd, const char *fmt, ...) {
|
|
4dc: 8b 75 08 mov 0x8(%ebp),%esi
|
|
for (i = 0; fmt[i]; i++) {
|
|
4df: 0f b6 13 movzbl (%ebx),%edx
|
|
4e2: 84 d2 test %dl,%dl
|
|
4e4: 74 6a je 550 <printf+0x80>
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
4e6: 8d 45 10 lea 0x10(%ebp),%eax
|
|
4e9: 83 c3 01 add $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
4ec: 8d 7d e7 lea -0x19(%ebp),%edi
|
|
state = 0;
|
|
4ef: 31 c9 xor %ecx,%ecx
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
4f1: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
4f4: eb 36 jmp 52c <printf+0x5c>
|
|
4f6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
4fd: 8d 76 00 lea 0x0(%esi),%esi
|
|
500: 89 4d d4 mov %ecx,-0x2c(%ebp)
|
|
c = fmt[i] & 0xff;
|
|
if (state == 0) {
|
|
if (c == '%') {
|
|
state = '%';
|
|
503: b9 25 00 00 00 mov $0x25,%ecx
|
|
if (c == '%') {
|
|
508: 83 f8 25 cmp $0x25,%eax
|
|
50b: 74 15 je 522 <printf+0x52>
|
|
write(fd, &c, 1);
|
|
50d: 83 ec 04 sub $0x4,%esp
|
|
510: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
513: 6a 01 push $0x1
|
|
515: 57 push %edi
|
|
516: 56 push %esi
|
|
517: e8 b7 fe ff ff call 3d3 <write>
|
|
51c: 8b 4d d4 mov -0x2c(%ebp),%ecx
|
|
}
|
|
else {
|
|
putc(fd, c);
|
|
51f: 83 c4 10 add $0x10,%esp
|
|
for (i = 0; fmt[i]; i++) {
|
|
522: 0f b6 13 movzbl (%ebx),%edx
|
|
525: 83 c3 01 add $0x1,%ebx
|
|
528: 84 d2 test %dl,%dl
|
|
52a: 74 24 je 550 <printf+0x80>
|
|
c = fmt[i] & 0xff;
|
|
52c: 0f b6 c2 movzbl %dl,%eax
|
|
if (state == 0) {
|
|
52f: 85 c9 test %ecx,%ecx
|
|
531: 74 cd je 500 <printf+0x30>
|
|
}
|
|
}
|
|
else if (state == '%') {
|
|
533: 83 f9 25 cmp $0x25,%ecx
|
|
536: 75 ea jne 522 <printf+0x52>
|
|
if (c == 'd') {
|
|
538: 83 f8 25 cmp $0x25,%eax
|
|
53b: 0f 84 07 01 00 00 je 648 <printf+0x178>
|
|
541: 83 e8 63 sub $0x63,%eax
|
|
544: 83 f8 15 cmp $0x15,%eax
|
|
547: 77 17 ja 560 <printf+0x90>
|
|
549: ff 24 85 38 08 00 00 jmp *0x838(,%eax,4)
|
|
putc(fd, c);
|
|
}
|
|
state = 0;
|
|
}
|
|
}
|
|
}
|
|
550: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
553: 5b pop %ebx
|
|
554: 5e pop %esi
|
|
555: 5f pop %edi
|
|
556: 5d pop %ebp
|
|
557: c3 ret
|
|
558: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
55f: 90 nop
|
|
write(fd, &c, 1);
|
|
560: 83 ec 04 sub $0x4,%esp
|
|
563: 88 55 d4 mov %dl,-0x2c(%ebp)
|
|
566: 6a 01 push $0x1
|
|
568: 57 push %edi
|
|
569: 56 push %esi
|
|
56a: c6 45 e7 25 movb $0x25,-0x19(%ebp)
|
|
56e: e8 60 fe ff ff call 3d3 <write>
|
|
putc(fd, c);
|
|
573: 0f b6 55 d4 movzbl -0x2c(%ebp),%edx
|
|
write(fd, &c, 1);
|
|
577: 83 c4 0c add $0xc,%esp
|
|
57a: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
57d: 6a 01 push $0x1
|
|
57f: 57 push %edi
|
|
580: 56 push %esi
|
|
581: e8 4d fe ff ff call 3d3 <write>
|
|
putc(fd, c);
|
|
586: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
589: 31 c9 xor %ecx,%ecx
|
|
58b: eb 95 jmp 522 <printf+0x52>
|
|
58d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 16, 0);
|
|
590: 83 ec 0c sub $0xc,%esp
|
|
593: b9 10 00 00 00 mov $0x10,%ecx
|
|
598: 6a 00 push $0x0
|
|
59a: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
59d: 8b 10 mov (%eax),%edx
|
|
59f: 89 f0 mov %esi,%eax
|
|
5a1: e8 7a fe ff ff call 420 <printint>
|
|
ap++;
|
|
5a6: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
5aa: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
5ad: 31 c9 xor %ecx,%ecx
|
|
5af: e9 6e ff ff ff jmp 522 <printf+0x52>
|
|
5b4: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
s = (char*)*ap;
|
|
5b8: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
5bb: 8b 10 mov (%eax),%edx
|
|
ap++;
|
|
5bd: 83 c0 04 add $0x4,%eax
|
|
5c0: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
if (s == 0) {
|
|
5c3: 85 d2 test %edx,%edx
|
|
5c5: 0f 84 8d 00 00 00 je 658 <printf+0x188>
|
|
while (*s != 0) {
|
|
5cb: 0f b6 02 movzbl (%edx),%eax
|
|
state = 0;
|
|
5ce: 31 c9 xor %ecx,%ecx
|
|
while (*s != 0) {
|
|
5d0: 84 c0 test %al,%al
|
|
5d2: 0f 84 4a ff ff ff je 522 <printf+0x52>
|
|
5d8: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
5db: 89 d3 mov %edx,%ebx
|
|
5dd: 8d 76 00 lea 0x0(%esi),%esi
|
|
write(fd, &c, 1);
|
|
5e0: 83 ec 04 sub $0x4,%esp
|
|
s++;
|
|
5e3: 83 c3 01 add $0x1,%ebx
|
|
5e6: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
5e9: 6a 01 push $0x1
|
|
5eb: 57 push %edi
|
|
5ec: 56 push %esi
|
|
5ed: e8 e1 fd ff ff call 3d3 <write>
|
|
while (*s != 0) {
|
|
5f2: 0f b6 03 movzbl (%ebx),%eax
|
|
5f5: 83 c4 10 add $0x10,%esp
|
|
5f8: 84 c0 test %al,%al
|
|
5fa: 75 e4 jne 5e0 <printf+0x110>
|
|
state = 0;
|
|
5fc: 8b 5d d4 mov -0x2c(%ebp),%ebx
|
|
5ff: 31 c9 xor %ecx,%ecx
|
|
601: e9 1c ff ff ff jmp 522 <printf+0x52>
|
|
606: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
60d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 10, 1);
|
|
610: 83 ec 0c sub $0xc,%esp
|
|
613: b9 0a 00 00 00 mov $0xa,%ecx
|
|
618: 6a 01 push $0x1
|
|
61a: e9 7b ff ff ff jmp 59a <printf+0xca>
|
|
61f: 90 nop
|
|
putc(fd, *ap);
|
|
620: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
write(fd, &c, 1);
|
|
623: 83 ec 04 sub $0x4,%esp
|
|
putc(fd, *ap);
|
|
626: 8b 00 mov (%eax),%eax
|
|
write(fd, &c, 1);
|
|
628: 6a 01 push $0x1
|
|
62a: 57 push %edi
|
|
62b: 56 push %esi
|
|
putc(fd, *ap);
|
|
62c: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
62f: e8 9f fd ff ff call 3d3 <write>
|
|
ap++;
|
|
634: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
638: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
63b: 31 c9 xor %ecx,%ecx
|
|
63d: e9 e0 fe ff ff jmp 522 <printf+0x52>
|
|
642: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
putc(fd, c);
|
|
648: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
64b: 83 ec 04 sub $0x4,%esp
|
|
64e: e9 2a ff ff ff jmp 57d <printf+0xad>
|
|
653: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
657: 90 nop
|
|
s = "(null)";
|
|
658: ba 30 08 00 00 mov $0x830,%edx
|
|
while (*s != 0) {
|
|
65d: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
660: b8 28 00 00 00 mov $0x28,%eax
|
|
665: 89 d3 mov %edx,%ebx
|
|
667: e9 74 ff ff ff jmp 5e0 <printf+0x110>
|
|
66c: 66 90 xchg %ax,%ax
|
|
66e: 66 90 xchg %ax,%ax
|
|
|
|
00000670 <free>:
|
|
typedef union header Header;
|
|
|
|
static Header base;
|
|
static Header *freep;
|
|
|
|
void free(void *ap) {
|
|
670: 55 push %ebp
|
|
Header *bp, *p;
|
|
|
|
bp = (Header*)ap - 1;
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
671: a1 80 0d 00 00 mov 0xd80,%eax
|
|
void free(void *ap) {
|
|
676: 89 e5 mov %esp,%ebp
|
|
678: 57 push %edi
|
|
679: 56 push %esi
|
|
67a: 53 push %ebx
|
|
67b: 8b 5d 08 mov 0x8(%ebp),%ebx
|
|
bp = (Header*)ap - 1;
|
|
67e: 8d 4b f8 lea -0x8(%ebx),%ecx
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
681: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
688: 89 c2 mov %eax,%edx
|
|
68a: 8b 00 mov (%eax),%eax
|
|
68c: 39 ca cmp %ecx,%edx
|
|
68e: 73 30 jae 6c0 <free+0x50>
|
|
690: 39 c1 cmp %eax,%ecx
|
|
692: 72 04 jb 698 <free+0x28>
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
694: 39 c2 cmp %eax,%edx
|
|
696: 72 f0 jb 688 <free+0x18>
|
|
break;
|
|
}
|
|
}
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
698: 8b 73 fc mov -0x4(%ebx),%esi
|
|
69b: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
69e: 39 f8 cmp %edi,%eax
|
|
6a0: 74 30 je 6d2 <free+0x62>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
6a2: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
}
|
|
else {
|
|
bp->s.ptr = p->s.ptr;
|
|
}
|
|
if (p + p->s.size == bp) {
|
|
6a5: 8b 42 04 mov 0x4(%edx),%eax
|
|
6a8: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
6ab: 39 f1 cmp %esi,%ecx
|
|
6ad: 74 3a je 6e9 <free+0x79>
|
|
p->s.size += bp->s.size;
|
|
p->s.ptr = bp->s.ptr;
|
|
6af: 89 0a mov %ecx,(%edx)
|
|
}
|
|
else {
|
|
p->s.ptr = bp;
|
|
}
|
|
freep = p;
|
|
}
|
|
6b1: 5b pop %ebx
|
|
freep = p;
|
|
6b2: 89 15 80 0d 00 00 mov %edx,0xd80
|
|
}
|
|
6b8: 5e pop %esi
|
|
6b9: 5f pop %edi
|
|
6ba: 5d pop %ebp
|
|
6bb: c3 ret
|
|
6bc: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
6c0: 39 c2 cmp %eax,%edx
|
|
6c2: 72 c4 jb 688 <free+0x18>
|
|
6c4: 39 c1 cmp %eax,%ecx
|
|
6c6: 73 c0 jae 688 <free+0x18>
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
6c8: 8b 73 fc mov -0x4(%ebx),%esi
|
|
6cb: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
6ce: 39 f8 cmp %edi,%eax
|
|
6d0: 75 d0 jne 6a2 <free+0x32>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
6d2: 03 70 04 add 0x4(%eax),%esi
|
|
6d5: 89 73 fc mov %esi,-0x4(%ebx)
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
6d8: 8b 02 mov (%edx),%eax
|
|
6da: 8b 00 mov (%eax),%eax
|
|
6dc: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
if (p + p->s.size == bp) {
|
|
6df: 8b 42 04 mov 0x4(%edx),%eax
|
|
6e2: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
6e5: 39 f1 cmp %esi,%ecx
|
|
6e7: 75 c6 jne 6af <free+0x3f>
|
|
p->s.size += bp->s.size;
|
|
6e9: 03 43 fc add -0x4(%ebx),%eax
|
|
freep = p;
|
|
6ec: 89 15 80 0d 00 00 mov %edx,0xd80
|
|
p->s.size += bp->s.size;
|
|
6f2: 89 42 04 mov %eax,0x4(%edx)
|
|
p->s.ptr = bp->s.ptr;
|
|
6f5: 8b 4b f8 mov -0x8(%ebx),%ecx
|
|
6f8: 89 0a mov %ecx,(%edx)
|
|
}
|
|
6fa: 5b pop %ebx
|
|
6fb: 5e pop %esi
|
|
6fc: 5f pop %edi
|
|
6fd: 5d pop %ebp
|
|
6fe: c3 ret
|
|
6ff: 90 nop
|
|
|
|
00000700 <malloc>:
|
|
hp->s.size = nu;
|
|
free((void*)(hp + 1));
|
|
return freep;
|
|
}
|
|
|
|
void* malloc(uint nbytes) {
|
|
700: 55 push %ebp
|
|
701: 89 e5 mov %esp,%ebp
|
|
703: 57 push %edi
|
|
704: 56 push %esi
|
|
705: 53 push %ebx
|
|
706: 83 ec 1c sub $0x1c,%esp
|
|
Header *p, *prevp;
|
|
uint nunits;
|
|
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
709: 8b 45 08 mov 0x8(%ebp),%eax
|
|
if ((prevp = freep) == 0) {
|
|
70c: 8b 3d 80 0d 00 00 mov 0xd80,%edi
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
712: 8d 70 07 lea 0x7(%eax),%esi
|
|
715: c1 ee 03 shr $0x3,%esi
|
|
718: 83 c6 01 add $0x1,%esi
|
|
if ((prevp = freep) == 0) {
|
|
71b: 85 ff test %edi,%edi
|
|
71d: 0f 84 9d 00 00 00 je 7c0 <malloc+0xc0>
|
|
base.s.ptr = freep = prevp = &base;
|
|
base.s.size = 0;
|
|
}
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
723: 8b 17 mov (%edi),%edx
|
|
if (p->s.size >= nunits) {
|
|
725: 8b 4a 04 mov 0x4(%edx),%ecx
|
|
728: 39 f1 cmp %esi,%ecx
|
|
72a: 73 6a jae 796 <malloc+0x96>
|
|
72c: bb 00 10 00 00 mov $0x1000,%ebx
|
|
731: 39 de cmp %ebx,%esi
|
|
733: 0f 43 de cmovae %esi,%ebx
|
|
p = sbrk(nu * sizeof(Header));
|
|
736: 8d 04 dd 00 00 00 00 lea 0x0(,%ebx,8),%eax
|
|
73d: 89 45 e4 mov %eax,-0x1c(%ebp)
|
|
740: eb 17 jmp 759 <malloc+0x59>
|
|
742: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
748: 8b 02 mov (%edx),%eax
|
|
if (p->s.size >= nunits) {
|
|
74a: 8b 48 04 mov 0x4(%eax),%ecx
|
|
74d: 39 f1 cmp %esi,%ecx
|
|
74f: 73 4f jae 7a0 <malloc+0xa0>
|
|
p->s.size = nunits;
|
|
}
|
|
freep = prevp;
|
|
return (void*)(p + 1);
|
|
}
|
|
if (p == freep) {
|
|
751: 8b 3d 80 0d 00 00 mov 0xd80,%edi
|
|
757: 89 c2 mov %eax,%edx
|
|
759: 39 d7 cmp %edx,%edi
|
|
75b: 75 eb jne 748 <malloc+0x48>
|
|
p = sbrk(nu * sizeof(Header));
|
|
75d: 83 ec 0c sub $0xc,%esp
|
|
760: ff 75 e4 push -0x1c(%ebp)
|
|
763: e8 4b fc ff ff call 3b3 <sbrk>
|
|
if (p == (char*)-1) {
|
|
768: 83 c4 10 add $0x10,%esp
|
|
76b: 83 f8 ff cmp $0xffffffff,%eax
|
|
76e: 74 1c je 78c <malloc+0x8c>
|
|
hp->s.size = nu;
|
|
770: 89 58 04 mov %ebx,0x4(%eax)
|
|
free((void*)(hp + 1));
|
|
773: 83 ec 0c sub $0xc,%esp
|
|
776: 83 c0 08 add $0x8,%eax
|
|
779: 50 push %eax
|
|
77a: e8 f1 fe ff ff call 670 <free>
|
|
return freep;
|
|
77f: 8b 15 80 0d 00 00 mov 0xd80,%edx
|
|
if ((p = morecore(nunits)) == 0) {
|
|
785: 83 c4 10 add $0x10,%esp
|
|
788: 85 d2 test %edx,%edx
|
|
78a: 75 bc jne 748 <malloc+0x48>
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
78c: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return 0;
|
|
78f: 31 c0 xor %eax,%eax
|
|
}
|
|
791: 5b pop %ebx
|
|
792: 5e pop %esi
|
|
793: 5f pop %edi
|
|
794: 5d pop %ebp
|
|
795: c3 ret
|
|
if (p->s.size >= nunits) {
|
|
796: 89 d0 mov %edx,%eax
|
|
798: 89 fa mov %edi,%edx
|
|
79a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
if (p->s.size == nunits) {
|
|
7a0: 39 ce cmp %ecx,%esi
|
|
7a2: 74 4c je 7f0 <malloc+0xf0>
|
|
p->s.size -= nunits;
|
|
7a4: 29 f1 sub %esi,%ecx
|
|
7a6: 89 48 04 mov %ecx,0x4(%eax)
|
|
p += p->s.size;
|
|
7a9: 8d 04 c8 lea (%eax,%ecx,8),%eax
|
|
p->s.size = nunits;
|
|
7ac: 89 70 04 mov %esi,0x4(%eax)
|
|
freep = prevp;
|
|
7af: 89 15 80 0d 00 00 mov %edx,0xd80
|
|
}
|
|
7b5: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return (void*)(p + 1);
|
|
7b8: 83 c0 08 add $0x8,%eax
|
|
}
|
|
7bb: 5b pop %ebx
|
|
7bc: 5e pop %esi
|
|
7bd: 5f pop %edi
|
|
7be: 5d pop %ebp
|
|
7bf: c3 ret
|
|
base.s.ptr = freep = prevp = &base;
|
|
7c0: c7 05 80 0d 00 00 84 movl $0xd84,0xd80
|
|
7c7: 0d 00 00
|
|
base.s.size = 0;
|
|
7ca: bf 84 0d 00 00 mov $0xd84,%edi
|
|
base.s.ptr = freep = prevp = &base;
|
|
7cf: c7 05 84 0d 00 00 84 movl $0xd84,0xd84
|
|
7d6: 0d 00 00
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
7d9: 89 fa mov %edi,%edx
|
|
base.s.size = 0;
|
|
7db: c7 05 88 0d 00 00 00 movl $0x0,0xd88
|
|
7e2: 00 00 00
|
|
if (p->s.size >= nunits) {
|
|
7e5: e9 42 ff ff ff jmp 72c <malloc+0x2c>
|
|
7ea: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
prevp->s.ptr = p->s.ptr;
|
|
7f0: 8b 08 mov (%eax),%ecx
|
|
7f2: 89 0a mov %ecx,(%edx)
|
|
7f4: eb b9 jmp 7af <malloc+0xaf>
|