1203 lines
41 KiB
NASM
1203 lines
41 KiB
NASM
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_screen: file format elf32-i386
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Disassembly of section .text:
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00000000 <main>:
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#include "types.h"
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#include "user.h"
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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: 53 push %ebx
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10: 51 push %ecx
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11: 83 ec 08 sub $0x8,%esp
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14: 8b 31 mov (%ecx),%esi
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16: 8b 79 04 mov 0x4(%ecx),%edi
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//int consoles = 0;
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int pid;
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//char* comment = "";
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for (int i = 1; i < argc; i++) {
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19: 83 fe 01 cmp $0x1,%esi
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1c: 7e 24 jle 42 <main+0x42>
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1e: bb 01 00 00 00 mov $0x1,%ebx
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23: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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27: 90 nop
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if (strcmp(argv[i], "-c") == 0) {
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28: 83 ec 08 sub $0x8,%esp
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2b: 68 78 07 00 00 push $0x778
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30: ff 34 9f push (%edi,%ebx,4)
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for (int i = 1; i < argc; i++) {
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33: 83 c3 01 add $0x1,%ebx
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if (strcmp(argv[i], "-c") == 0) {
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36: e8 85 00 00 00 call c0 <strcmp>
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for (int i = 1; i < argc; i++) {
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3b: 83 c4 10 add $0x10,%esp
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3e: 39 de cmp %ebx,%esi
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40: 75 e6 jne 28 <main+0x28>
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}
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}
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pid = fork();
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42: e8 94 02 00 00 call 2db <fork>
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if (pid < 0) {
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47: 85 c0 test %eax,%eax
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49: 78 27 js 72 <main+0x72>
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printf(1, "screen: fork failed\n");
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}
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if (pid == 0) {
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4b: 74 05 je 52 <main+0x52>
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exec("sh", argv);
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printf(1, "screen: exec sh failed\n");
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}
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exit();
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4d: e8 91 02 00 00 call 2e3 <exit>
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exec("sh", argv);
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52: 50 push %eax
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53: 50 push %eax
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54: 57 push %edi
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55: 68 90 07 00 00 push $0x790
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5a: e8 ac 02 00 00 call 30b <exec>
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printf(1, "screen: exec sh failed\n");
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5f: 5a pop %edx
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60: 59 pop %ecx
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61: 68 93 07 00 00 push $0x793
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66: 6a 01 push $0x1
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68: e8 e3 03 00 00 call 450 <printf>
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6d: 83 c4 10 add $0x10,%esp
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70: eb db jmp 4d <main+0x4d>
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printf(1, "screen: fork failed\n");
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72: 53 push %ebx
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73: 53 push %ebx
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74: 68 7b 07 00 00 push $0x77b
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79: 6a 01 push $0x1
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7b: e8 d0 03 00 00 call 450 <printf>
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80: 83 c4 10 add $0x10,%esp
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83: eb c8 jmp 4d <main+0x4d>
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85: 66 90 xchg %ax,%ax
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87: 66 90 xchg %ax,%ax
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89: 66 90 xchg %ax,%ax
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8b: 66 90 xchg %ax,%ax
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8d: 66 90 xchg %ax,%ax
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8f: 90 nop
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00000090 <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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90: 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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91: 31 c0 xor %eax,%eax
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char*strcpy(char *s, const char *t) {
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93: 89 e5 mov %esp,%ebp
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95: 53 push %ebx
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96: 8b 4d 08 mov 0x8(%ebp),%ecx
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99: 8b 5d 0c mov 0xc(%ebp),%ebx
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9c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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while ((*s++ = *t++) != 0) {
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a0: 0f b6 14 03 movzbl (%ebx,%eax,1),%edx
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a4: 88 14 01 mov %dl,(%ecx,%eax,1)
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a7: 83 c0 01 add $0x1,%eax
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aa: 84 d2 test %dl,%dl
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ac: 75 f2 jne a0 <strcpy+0x10>
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;
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}
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return os;
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}
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ae: 8b 5d fc mov -0x4(%ebp),%ebx
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b1: 89 c8 mov %ecx,%eax
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b3: c9 leave
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b4: c3 ret
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b5: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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bc: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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000000c0 <strcmp>:
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int strcmp(const char *p, const char *q) {
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c0: 55 push %ebp
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c1: 89 e5 mov %esp,%ebp
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c3: 53 push %ebx
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c4: 8b 55 08 mov 0x8(%ebp),%edx
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c7: 8b 4d 0c mov 0xc(%ebp),%ecx
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while (*p && *p == *q) {
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ca: 0f b6 02 movzbl (%edx),%eax
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cd: 84 c0 test %al,%al
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cf: 75 17 jne e8 <strcmp+0x28>
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d1: eb 3a jmp 10d <strcmp+0x4d>
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d3: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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d7: 90 nop
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d8: 0f b6 42 01 movzbl 0x1(%edx),%eax
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p++, q++;
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dc: 83 c2 01 add $0x1,%edx
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df: 8d 59 01 lea 0x1(%ecx),%ebx
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while (*p && *p == *q) {
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e2: 84 c0 test %al,%al
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e4: 74 1a je 100 <strcmp+0x40>
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p++, q++;
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e6: 89 d9 mov %ebx,%ecx
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while (*p && *p == *q) {
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e8: 0f b6 19 movzbl (%ecx),%ebx
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eb: 38 c3 cmp %al,%bl
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ed: 74 e9 je d8 <strcmp+0x18>
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}
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return (uchar) * p - (uchar) * q;
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ef: 29 d8 sub %ebx,%eax
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}
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f1: 8b 5d fc mov -0x4(%ebp),%ebx
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f4: c9 leave
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f5: c3 ret
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f6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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fd: 8d 76 00 lea 0x0(%esi),%esi
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return (uchar) * p - (uchar) * q;
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100: 0f b6 59 01 movzbl 0x1(%ecx),%ebx
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104: 31 c0 xor %eax,%eax
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106: 29 d8 sub %ebx,%eax
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}
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108: 8b 5d fc mov -0x4(%ebp),%ebx
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10b: c9 leave
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10c: c3 ret
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return (uchar) * p - (uchar) * q;
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10d: 0f b6 19 movzbl (%ecx),%ebx
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110: 31 c0 xor %eax,%eax
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112: eb db jmp ef <strcmp+0x2f>
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114: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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11b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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11f: 90 nop
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00000120 <strlen>:
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uint strlen(const char *s) {
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120: 55 push %ebp
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121: 89 e5 mov %esp,%ebp
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123: 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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126: 80 3a 00 cmpb $0x0,(%edx)
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129: 74 15 je 140 <strlen+0x20>
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12b: 31 c0 xor %eax,%eax
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12d: 8d 76 00 lea 0x0(%esi),%esi
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130: 83 c0 01 add $0x1,%eax
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133: 80 3c 02 00 cmpb $0x0,(%edx,%eax,1)
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137: 89 c1 mov %eax,%ecx
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139: 75 f5 jne 130 <strlen+0x10>
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;
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}
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return n;
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}
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13b: 89 c8 mov %ecx,%eax
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13d: 5d pop %ebp
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13e: c3 ret
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13f: 90 nop
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for (n = 0; s[n]; n++) {
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140: 31 c9 xor %ecx,%ecx
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}
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142: 5d pop %ebp
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143: 89 c8 mov %ecx,%eax
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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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00000150 <memset>:
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void* memset(void *dst, int c, uint n) {
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150: 55 push %ebp
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151: 89 e5 mov %esp,%ebp
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153: 57 push %edi
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154: 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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157: 8b 4d 10 mov 0x10(%ebp),%ecx
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15a: 8b 45 0c mov 0xc(%ebp),%eax
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15d: 89 d7 mov %edx,%edi
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15f: fc cld
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160: 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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162: 8b 7d fc mov -0x4(%ebp),%edi
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165: 89 d0 mov %edx,%eax
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167: c9 leave
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168: c3 ret
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169: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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00000170 <strchr>:
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char* strchr(const char *s, char c) {
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170: 55 push %ebp
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171: 89 e5 mov %esp,%ebp
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173: 8b 45 08 mov 0x8(%ebp),%eax
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176: 0f b6 4d 0c movzbl 0xc(%ebp),%ecx
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for (; *s; s++) {
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17a: 0f b6 10 movzbl (%eax),%edx
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17d: 84 d2 test %dl,%dl
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17f: 75 12 jne 193 <strchr+0x23>
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181: eb 1d jmp 1a0 <strchr+0x30>
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183: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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187: 90 nop
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188: 0f b6 50 01 movzbl 0x1(%eax),%edx
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18c: 83 c0 01 add $0x1,%eax
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18f: 84 d2 test %dl,%dl
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191: 74 0d je 1a0 <strchr+0x30>
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if (*s == c) {
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193: 38 d1 cmp %dl,%cl
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195: 75 f1 jne 188 <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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197: 5d pop %ebp
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198: c3 ret
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199: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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return 0;
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1a0: 31 c0 xor %eax,%eax
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}
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1a2: 5d pop %ebp
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1a3: c3 ret
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1a4: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1ab: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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1af: 90 nop
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000001b0 <gets>:
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char* gets(char *buf, int max) {
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1b0: 55 push %ebp
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1b1: 89 e5 mov %esp,%ebp
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1b3: 57 push %edi
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1b4: 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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1b5: 8d 7d e7 lea -0x19(%ebp),%edi
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char* gets(char *buf, int max) {
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1b8: 53 push %ebx
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for (i = 0; i + 1 < max;) {
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1b9: 31 db xor %ebx,%ebx
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char* gets(char *buf, int max) {
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1bb: 83 ec 1c sub $0x1c,%esp
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for (i = 0; i + 1 < max;) {
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1be: eb 27 jmp 1e7 <gets+0x37>
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cc = read(0, &c, 1);
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1c0: 83 ec 04 sub $0x4,%esp
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1c3: 6a 01 push $0x1
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1c5: 57 push %edi
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1c6: 6a 00 push $0x0
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1c8: e8 2e 01 00 00 call 2fb <read>
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if (cc < 1) {
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1cd: 83 c4 10 add $0x10,%esp
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1d0: 85 c0 test %eax,%eax
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1d2: 7e 1d jle 1f1 <gets+0x41>
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break;
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}
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buf[i++] = c;
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1d4: 0f b6 45 e7 movzbl -0x19(%ebp),%eax
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1d8: 8b 55 08 mov 0x8(%ebp),%edx
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1db: 88 44 1a ff mov %al,-0x1(%edx,%ebx,1)
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if (c == '\n' || c == '\r') {
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1df: 3c 0a cmp $0xa,%al
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1e1: 74 1d je 200 <gets+0x50>
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1e3: 3c 0d cmp $0xd,%al
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1e5: 74 19 je 200 <gets+0x50>
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for (i = 0; i + 1 < max;) {
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1e7: 89 de mov %ebx,%esi
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1e9: 83 c3 01 add $0x1,%ebx
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1ec: 3b 5d 0c cmp 0xc(%ebp),%ebx
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1ef: 7c cf jl 1c0 <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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1f1: 8b 45 08 mov 0x8(%ebp),%eax
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1f4: c6 04 30 00 movb $0x0,(%eax,%esi,1)
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return buf;
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}
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1f8: 8d 65 f4 lea -0xc(%ebp),%esp
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1fb: 5b pop %ebx
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1fc: 5e pop %esi
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1fd: 5f pop %edi
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1fe: 5d pop %ebp
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1ff: c3 ret
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buf[i] = '\0';
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200: 8b 45 08 mov 0x8(%ebp),%eax
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203: 89 de mov %ebx,%esi
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205: c6 04 30 00 movb $0x0,(%eax,%esi,1)
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}
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209: 8d 65 f4 lea -0xc(%ebp),%esp
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20c: 5b pop %ebx
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20d: 5e pop %esi
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20e: 5f pop %edi
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20f: 5d pop %ebp
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210: c3 ret
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211: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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218: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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21f: 90 nop
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00000220 <stat>:
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int stat(const char *n, struct stat *st) {
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220: 55 push %ebp
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221: 89 e5 mov %esp,%ebp
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223: 56 push %esi
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224: 53 push %ebx
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int fd;
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int r;
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|
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fd = open(n, O_RDONLY);
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225: 83 ec 08 sub $0x8,%esp
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228: 6a 00 push $0x0
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22a: ff 75 08 push 0x8(%ebp)
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22d: e8 19 01 00 00 call 34b <open>
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if (fd < 0) {
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232: 83 c4 10 add $0x10,%esp
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235: 85 c0 test %eax,%eax
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237: 78 27 js 260 <stat+0x40>
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return -1;
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}
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r = fstat(fd, st);
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239: 83 ec 08 sub $0x8,%esp
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23c: ff 75 0c push 0xc(%ebp)
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23f: 89 c3 mov %eax,%ebx
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241: 50 push %eax
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242: e8 cc 00 00 00 call 313 <fstat>
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close(fd);
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247: 89 1c 24 mov %ebx,(%esp)
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r = fstat(fd, st);
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24a: 89 c6 mov %eax,%esi
|
|
close(fd);
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24c: e8 2a 01 00 00 call 37b <close>
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return r;
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|
251: 83 c4 10 add $0x10,%esp
|
|
}
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254: 8d 65 f8 lea -0x8(%ebp),%esp
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257: 89 f0 mov %esi,%eax
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259: 5b pop %ebx
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|
25a: 5e pop %esi
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25b: 5d pop %ebp
|
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25c: c3 ret
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25d: 8d 76 00 lea 0x0(%esi),%esi
|
|
return -1;
|
|
260: be ff ff ff ff mov $0xffffffff,%esi
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|
265: eb ed jmp 254 <stat+0x34>
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267: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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26e: 66 90 xchg %ax,%ax
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|
|
|
00000270 <atoi>:
|
|
|
|
int atoi(const char *s) {
|
|
270: 55 push %ebp
|
|
271: 89 e5 mov %esp,%ebp
|
|
273: 53 push %ebx
|
|
274: 8b 55 08 mov 0x8(%ebp),%edx
|
|
int n;
|
|
|
|
n = 0;
|
|
while ('0' <= *s && *s <= '9') {
|
|
277: 0f be 02 movsbl (%edx),%eax
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|
27a: 8d 48 d0 lea -0x30(%eax),%ecx
|
|
27d: 80 f9 09 cmp $0x9,%cl
|
|
n = 0;
|
|
280: b9 00 00 00 00 mov $0x0,%ecx
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|
while ('0' <= *s && *s <= '9') {
|
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285: 77 1e ja 2a5 <atoi+0x35>
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|
287: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
28e: 66 90 xchg %ax,%ax
|
|
n = n * 10 + *s++ - '0';
|
|
290: 83 c2 01 add $0x1,%edx
|
|
293: 8d 0c 89 lea (%ecx,%ecx,4),%ecx
|
|
296: 8d 4c 48 d0 lea -0x30(%eax,%ecx,2),%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
29a: 0f be 02 movsbl (%edx),%eax
|
|
29d: 8d 58 d0 lea -0x30(%eax),%ebx
|
|
2a0: 80 fb 09 cmp $0x9,%bl
|
|
2a3: 76 eb jbe 290 <atoi+0x20>
|
|
}
|
|
return n;
|
|
}
|
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2a5: 8b 5d fc mov -0x4(%ebp),%ebx
|
|
2a8: 89 c8 mov %ecx,%eax
|
|
2aa: c9 leave
|
|
2ab: c3 ret
|
|
2ac: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
|
|
000002b0 <memmove>:
|
|
|
|
void* memmove(void *vdst, const void *vsrc, int n) {
|
|
2b0: 55 push %ebp
|
|
2b1: 89 e5 mov %esp,%ebp
|
|
2b3: 57 push %edi
|
|
2b4: 8b 45 10 mov 0x10(%ebp),%eax
|
|
2b7: 8b 55 08 mov 0x8(%ebp),%edx
|
|
2ba: 56 push %esi
|
|
2bb: 8b 75 0c mov 0xc(%ebp),%esi
|
|
char *dst;
|
|
const char *src;
|
|
|
|
dst = vdst;
|
|
src = vsrc;
|
|
while (n-- > 0) {
|
|
2be: 85 c0 test %eax,%eax
|
|
2c0: 7e 13 jle 2d5 <memmove+0x25>
|
|
2c2: 01 d0 add %edx,%eax
|
|
dst = vdst;
|
|
2c4: 89 d7 mov %edx,%edi
|
|
2c6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
2cd: 8d 76 00 lea 0x0(%esi),%esi
|
|
*dst++ = *src++;
|
|
2d0: a4 movsb %ds:(%esi),%es:(%edi)
|
|
while (n-- > 0) {
|
|
2d1: 39 f8 cmp %edi,%eax
|
|
2d3: 75 fb jne 2d0 <memmove+0x20>
|
|
}
|
|
return vdst;
|
|
}
|
|
2d5: 5e pop %esi
|
|
2d6: 89 d0 mov %edx,%eax
|
|
2d8: 5f pop %edi
|
|
2d9: 5d pop %ebp
|
|
2da: c3 ret
|
|
|
|
000002db <fork>:
|
|
name: \
|
|
movl $SYS_ ## name, %eax; \
|
|
int $T_SYSCALL; \
|
|
ret
|
|
|
|
SYSCALL(fork)
|
|
2db: b8 01 00 00 00 mov $0x1,%eax
|
|
2e0: cd 40 int $0x40
|
|
2e2: c3 ret
|
|
|
|
000002e3 <exit>:
|
|
SYSCALL(exit)
|
|
2e3: b8 02 00 00 00 mov $0x2,%eax
|
|
2e8: cd 40 int $0x40
|
|
2ea: c3 ret
|
|
|
|
000002eb <wait>:
|
|
SYSCALL(wait)
|
|
2eb: b8 03 00 00 00 mov $0x3,%eax
|
|
2f0: cd 40 int $0x40
|
|
2f2: c3 ret
|
|
|
|
000002f3 <pipe>:
|
|
SYSCALL(pipe)
|
|
2f3: b8 04 00 00 00 mov $0x4,%eax
|
|
2f8: cd 40 int $0x40
|
|
2fa: c3 ret
|
|
|
|
000002fb <read>:
|
|
SYSCALL(read)
|
|
2fb: b8 05 00 00 00 mov $0x5,%eax
|
|
300: cd 40 int $0x40
|
|
302: c3 ret
|
|
|
|
00000303 <kill>:
|
|
SYSCALL(kill)
|
|
303: b8 06 00 00 00 mov $0x6,%eax
|
|
308: cd 40 int $0x40
|
|
30a: c3 ret
|
|
|
|
0000030b <exec>:
|
|
SYSCALL(exec)
|
|
30b: b8 07 00 00 00 mov $0x7,%eax
|
|
310: cd 40 int $0x40
|
|
312: c3 ret
|
|
|
|
00000313 <fstat>:
|
|
SYSCALL(fstat)
|
|
313: b8 08 00 00 00 mov $0x8,%eax
|
|
318: cd 40 int $0x40
|
|
31a: c3 ret
|
|
|
|
0000031b <chdir>:
|
|
SYSCALL(chdir)
|
|
31b: b8 09 00 00 00 mov $0x9,%eax
|
|
320: cd 40 int $0x40
|
|
322: c3 ret
|
|
|
|
00000323 <dup>:
|
|
SYSCALL(dup)
|
|
323: b8 0a 00 00 00 mov $0xa,%eax
|
|
328: cd 40 int $0x40
|
|
32a: c3 ret
|
|
|
|
0000032b <getpid>:
|
|
SYSCALL(getpid)
|
|
32b: b8 0b 00 00 00 mov $0xb,%eax
|
|
330: cd 40 int $0x40
|
|
332: c3 ret
|
|
|
|
00000333 <sbrk>:
|
|
SYSCALL(sbrk)
|
|
333: b8 0c 00 00 00 mov $0xc,%eax
|
|
338: cd 40 int $0x40
|
|
33a: c3 ret
|
|
|
|
0000033b <sleep>:
|
|
SYSCALL(sleep)
|
|
33b: b8 0d 00 00 00 mov $0xd,%eax
|
|
340: cd 40 int $0x40
|
|
342: c3 ret
|
|
|
|
00000343 <uptime>:
|
|
SYSCALL(uptime)
|
|
343: b8 0e 00 00 00 mov $0xe,%eax
|
|
348: cd 40 int $0x40
|
|
34a: c3 ret
|
|
|
|
0000034b <open>:
|
|
SYSCALL(open)
|
|
34b: b8 0f 00 00 00 mov $0xf,%eax
|
|
350: cd 40 int $0x40
|
|
352: c3 ret
|
|
|
|
00000353 <write>:
|
|
SYSCALL(write)
|
|
353: b8 10 00 00 00 mov $0x10,%eax
|
|
358: cd 40 int $0x40
|
|
35a: c3 ret
|
|
|
|
0000035b <mknod>:
|
|
SYSCALL(mknod)
|
|
35b: b8 11 00 00 00 mov $0x11,%eax
|
|
360: cd 40 int $0x40
|
|
362: c3 ret
|
|
|
|
00000363 <unlink>:
|
|
SYSCALL(unlink)
|
|
363: b8 12 00 00 00 mov $0x12,%eax
|
|
368: cd 40 int $0x40
|
|
36a: c3 ret
|
|
|
|
0000036b <link>:
|
|
SYSCALL(link)
|
|
36b: b8 13 00 00 00 mov $0x13,%eax
|
|
370: cd 40 int $0x40
|
|
372: c3 ret
|
|
|
|
00000373 <mkdir>:
|
|
SYSCALL(mkdir)
|
|
373: b8 14 00 00 00 mov $0x14,%eax
|
|
378: cd 40 int $0x40
|
|
37a: c3 ret
|
|
|
|
0000037b <close>:
|
|
SYSCALL(close)
|
|
37b: b8 15 00 00 00 mov $0x15,%eax
|
|
380: cd 40 int $0x40
|
|
382: c3 ret
|
|
|
|
00000383 <getch>:
|
|
SYSCALL(getch)
|
|
383: b8 16 00 00 00 mov $0x16,%eax
|
|
388: cd 40 int $0x40
|
|
38a: c3 ret
|
|
|
|
0000038b <greeting>:
|
|
SYSCALL(greeting)
|
|
38b: b8 17 00 00 00 mov $0x17,%eax
|
|
390: cd 40 int $0x40
|
|
392: c3 ret
|
|
|
|
00000393 <shutdown>:
|
|
SYSCALL(shutdown)
|
|
393: b8 18 00 00 00 mov $0x18,%eax
|
|
398: cd 40 int $0x40
|
|
39a: c3 ret
|
|
39b: 66 90 xchg %ax,%ax
|
|
39d: 66 90 xchg %ax,%ax
|
|
39f: 90 nop
|
|
|
|
000003a0 <printint>:
|
|
|
|
static void putc(int fd, char c) {
|
|
write(fd, &c, 1);
|
|
}
|
|
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
3a0: 55 push %ebp
|
|
3a1: 89 e5 mov %esp,%ebp
|
|
3a3: 57 push %edi
|
|
3a4: 56 push %esi
|
|
3a5: 53 push %ebx
|
|
3a6: 83 ec 3c sub $0x3c,%esp
|
|
3a9: 89 4d c4 mov %ecx,-0x3c(%ebp)
|
|
uint x;
|
|
|
|
neg = 0;
|
|
if (sgn && xx < 0) {
|
|
neg = 1;
|
|
x = -xx;
|
|
3ac: 89 d1 mov %edx,%ecx
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
3ae: 89 45 b8 mov %eax,-0x48(%ebp)
|
|
if (sgn && xx < 0) {
|
|
3b1: 85 d2 test %edx,%edx
|
|
3b3: 0f 89 7f 00 00 00 jns 438 <printint+0x98>
|
|
3b9: f6 45 08 01 testb $0x1,0x8(%ebp)
|
|
3bd: 74 79 je 438 <printint+0x98>
|
|
neg = 1;
|
|
3bf: c7 45 bc 01 00 00 00 movl $0x1,-0x44(%ebp)
|
|
x = -xx;
|
|
3c6: f7 d9 neg %ecx
|
|
}
|
|
else {
|
|
x = xx;
|
|
}
|
|
|
|
i = 0;
|
|
3c8: 31 db xor %ebx,%ebx
|
|
3ca: 8d 75 d7 lea -0x29(%ebp),%esi
|
|
3cd: 8d 76 00 lea 0x0(%esi),%esi
|
|
do {
|
|
buf[i++] = digits[x % base];
|
|
3d0: 89 c8 mov %ecx,%eax
|
|
3d2: 31 d2 xor %edx,%edx
|
|
3d4: 89 cf mov %ecx,%edi
|
|
3d6: f7 75 c4 divl -0x3c(%ebp)
|
|
3d9: 0f b6 92 0c 08 00 00 movzbl 0x80c(%edx),%edx
|
|
3e0: 89 45 c0 mov %eax,-0x40(%ebp)
|
|
3e3: 89 d8 mov %ebx,%eax
|
|
3e5: 8d 5b 01 lea 0x1(%ebx),%ebx
|
|
}
|
|
while ((x /= base) != 0);
|
|
3e8: 8b 4d c0 mov -0x40(%ebp),%ecx
|
|
buf[i++] = digits[x % base];
|
|
3eb: 88 14 1e mov %dl,(%esi,%ebx,1)
|
|
while ((x /= base) != 0);
|
|
3ee: 39 7d c4 cmp %edi,-0x3c(%ebp)
|
|
3f1: 76 dd jbe 3d0 <printint+0x30>
|
|
if (neg) {
|
|
3f3: 8b 4d bc mov -0x44(%ebp),%ecx
|
|
3f6: 85 c9 test %ecx,%ecx
|
|
3f8: 74 0c je 406 <printint+0x66>
|
|
buf[i++] = '-';
|
|
3fa: c6 44 1d d8 2d movb $0x2d,-0x28(%ebp,%ebx,1)
|
|
buf[i++] = digits[x % base];
|
|
3ff: 89 d8 mov %ebx,%eax
|
|
buf[i++] = '-';
|
|
401: ba 2d 00 00 00 mov $0x2d,%edx
|
|
}
|
|
|
|
while (--i >= 0) {
|
|
406: 8b 7d b8 mov -0x48(%ebp),%edi
|
|
409: 8d 5c 05 d7 lea -0x29(%ebp,%eax,1),%ebx
|
|
40d: eb 07 jmp 416 <printint+0x76>
|
|
40f: 90 nop
|
|
putc(fd, buf[i]);
|
|
410: 0f b6 13 movzbl (%ebx),%edx
|
|
413: 83 eb 01 sub $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
416: 83 ec 04 sub $0x4,%esp
|
|
419: 88 55 d7 mov %dl,-0x29(%ebp)
|
|
41c: 6a 01 push $0x1
|
|
41e: 56 push %esi
|
|
41f: 57 push %edi
|
|
420: e8 2e ff ff ff call 353 <write>
|
|
while (--i >= 0) {
|
|
425: 83 c4 10 add $0x10,%esp
|
|
428: 39 de cmp %ebx,%esi
|
|
42a: 75 e4 jne 410 <printint+0x70>
|
|
}
|
|
}
|
|
42c: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
42f: 5b pop %ebx
|
|
430: 5e pop %esi
|
|
431: 5f pop %edi
|
|
432: 5d pop %ebp
|
|
433: c3 ret
|
|
434: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
neg = 0;
|
|
438: c7 45 bc 00 00 00 00 movl $0x0,-0x44(%ebp)
|
|
43f: eb 87 jmp 3c8 <printint+0x28>
|
|
441: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
448: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
44f: 90 nop
|
|
|
|
00000450 <printf>:
|
|
|
|
// Print to the given fd. Only understands %d, %x, %p, %s.
|
|
void printf(int fd, const char *fmt, ...) {
|
|
450: 55 push %ebp
|
|
451: 89 e5 mov %esp,%ebp
|
|
453: 57 push %edi
|
|
454: 56 push %esi
|
|
455: 53 push %ebx
|
|
456: 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++) {
|
|
459: 8b 5d 0c mov 0xc(%ebp),%ebx
|
|
void printf(int fd, const char *fmt, ...) {
|
|
45c: 8b 75 08 mov 0x8(%ebp),%esi
|
|
for (i = 0; fmt[i]; i++) {
|
|
45f: 0f b6 13 movzbl (%ebx),%edx
|
|
462: 84 d2 test %dl,%dl
|
|
464: 74 6a je 4d0 <printf+0x80>
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
466: 8d 45 10 lea 0x10(%ebp),%eax
|
|
469: 83 c3 01 add $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
46c: 8d 7d e7 lea -0x19(%ebp),%edi
|
|
state = 0;
|
|
46f: 31 c9 xor %ecx,%ecx
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
471: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
474: eb 36 jmp 4ac <printf+0x5c>
|
|
476: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
47d: 8d 76 00 lea 0x0(%esi),%esi
|
|
480: 89 4d d4 mov %ecx,-0x2c(%ebp)
|
|
c = fmt[i] & 0xff;
|
|
if (state == 0) {
|
|
if (c == '%') {
|
|
state = '%';
|
|
483: b9 25 00 00 00 mov $0x25,%ecx
|
|
if (c == '%') {
|
|
488: 83 f8 25 cmp $0x25,%eax
|
|
48b: 74 15 je 4a2 <printf+0x52>
|
|
write(fd, &c, 1);
|
|
48d: 83 ec 04 sub $0x4,%esp
|
|
490: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
493: 6a 01 push $0x1
|
|
495: 57 push %edi
|
|
496: 56 push %esi
|
|
497: e8 b7 fe ff ff call 353 <write>
|
|
49c: 8b 4d d4 mov -0x2c(%ebp),%ecx
|
|
}
|
|
else {
|
|
putc(fd, c);
|
|
49f: 83 c4 10 add $0x10,%esp
|
|
for (i = 0; fmt[i]; i++) {
|
|
4a2: 0f b6 13 movzbl (%ebx),%edx
|
|
4a5: 83 c3 01 add $0x1,%ebx
|
|
4a8: 84 d2 test %dl,%dl
|
|
4aa: 74 24 je 4d0 <printf+0x80>
|
|
c = fmt[i] & 0xff;
|
|
4ac: 0f b6 c2 movzbl %dl,%eax
|
|
if (state == 0) {
|
|
4af: 85 c9 test %ecx,%ecx
|
|
4b1: 74 cd je 480 <printf+0x30>
|
|
}
|
|
}
|
|
else if (state == '%') {
|
|
4b3: 83 f9 25 cmp $0x25,%ecx
|
|
4b6: 75 ea jne 4a2 <printf+0x52>
|
|
if (c == 'd') {
|
|
4b8: 83 f8 25 cmp $0x25,%eax
|
|
4bb: 0f 84 07 01 00 00 je 5c8 <printf+0x178>
|
|
4c1: 83 e8 63 sub $0x63,%eax
|
|
4c4: 83 f8 15 cmp $0x15,%eax
|
|
4c7: 77 17 ja 4e0 <printf+0x90>
|
|
4c9: ff 24 85 b4 07 00 00 jmp *0x7b4(,%eax,4)
|
|
putc(fd, c);
|
|
}
|
|
state = 0;
|
|
}
|
|
}
|
|
}
|
|
4d0: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
4d3: 5b pop %ebx
|
|
4d4: 5e pop %esi
|
|
4d5: 5f pop %edi
|
|
4d6: 5d pop %ebp
|
|
4d7: c3 ret
|
|
4d8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
4df: 90 nop
|
|
write(fd, &c, 1);
|
|
4e0: 83 ec 04 sub $0x4,%esp
|
|
4e3: 88 55 d4 mov %dl,-0x2c(%ebp)
|
|
4e6: 6a 01 push $0x1
|
|
4e8: 57 push %edi
|
|
4e9: 56 push %esi
|
|
4ea: c6 45 e7 25 movb $0x25,-0x19(%ebp)
|
|
4ee: e8 60 fe ff ff call 353 <write>
|
|
putc(fd, c);
|
|
4f3: 0f b6 55 d4 movzbl -0x2c(%ebp),%edx
|
|
write(fd, &c, 1);
|
|
4f7: 83 c4 0c add $0xc,%esp
|
|
4fa: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
4fd: 6a 01 push $0x1
|
|
4ff: 57 push %edi
|
|
500: 56 push %esi
|
|
501: e8 4d fe ff ff call 353 <write>
|
|
putc(fd, c);
|
|
506: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
509: 31 c9 xor %ecx,%ecx
|
|
50b: eb 95 jmp 4a2 <printf+0x52>
|
|
50d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 16, 0);
|
|
510: 83 ec 0c sub $0xc,%esp
|
|
513: b9 10 00 00 00 mov $0x10,%ecx
|
|
518: 6a 00 push $0x0
|
|
51a: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
51d: 8b 10 mov (%eax),%edx
|
|
51f: 89 f0 mov %esi,%eax
|
|
521: e8 7a fe ff ff call 3a0 <printint>
|
|
ap++;
|
|
526: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
52a: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
52d: 31 c9 xor %ecx,%ecx
|
|
52f: e9 6e ff ff ff jmp 4a2 <printf+0x52>
|
|
534: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
s = (char*)*ap;
|
|
538: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
53b: 8b 10 mov (%eax),%edx
|
|
ap++;
|
|
53d: 83 c0 04 add $0x4,%eax
|
|
540: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
if (s == 0) {
|
|
543: 85 d2 test %edx,%edx
|
|
545: 0f 84 8d 00 00 00 je 5d8 <printf+0x188>
|
|
while (*s != 0) {
|
|
54b: 0f b6 02 movzbl (%edx),%eax
|
|
state = 0;
|
|
54e: 31 c9 xor %ecx,%ecx
|
|
while (*s != 0) {
|
|
550: 84 c0 test %al,%al
|
|
552: 0f 84 4a ff ff ff je 4a2 <printf+0x52>
|
|
558: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
55b: 89 d3 mov %edx,%ebx
|
|
55d: 8d 76 00 lea 0x0(%esi),%esi
|
|
write(fd, &c, 1);
|
|
560: 83 ec 04 sub $0x4,%esp
|
|
s++;
|
|
563: 83 c3 01 add $0x1,%ebx
|
|
566: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
569: 6a 01 push $0x1
|
|
56b: 57 push %edi
|
|
56c: 56 push %esi
|
|
56d: e8 e1 fd ff ff call 353 <write>
|
|
while (*s != 0) {
|
|
572: 0f b6 03 movzbl (%ebx),%eax
|
|
575: 83 c4 10 add $0x10,%esp
|
|
578: 84 c0 test %al,%al
|
|
57a: 75 e4 jne 560 <printf+0x110>
|
|
state = 0;
|
|
57c: 8b 5d d4 mov -0x2c(%ebp),%ebx
|
|
57f: 31 c9 xor %ecx,%ecx
|
|
581: e9 1c ff ff ff jmp 4a2 <printf+0x52>
|
|
586: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
58d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 10, 1);
|
|
590: 83 ec 0c sub $0xc,%esp
|
|
593: b9 0a 00 00 00 mov $0xa,%ecx
|
|
598: 6a 01 push $0x1
|
|
59a: e9 7b ff ff ff jmp 51a <printf+0xca>
|
|
59f: 90 nop
|
|
putc(fd, *ap);
|
|
5a0: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
write(fd, &c, 1);
|
|
5a3: 83 ec 04 sub $0x4,%esp
|
|
putc(fd, *ap);
|
|
5a6: 8b 00 mov (%eax),%eax
|
|
write(fd, &c, 1);
|
|
5a8: 6a 01 push $0x1
|
|
5aa: 57 push %edi
|
|
5ab: 56 push %esi
|
|
putc(fd, *ap);
|
|
5ac: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
5af: e8 9f fd ff ff call 353 <write>
|
|
ap++;
|
|
5b4: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
5b8: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
5bb: 31 c9 xor %ecx,%ecx
|
|
5bd: e9 e0 fe ff ff jmp 4a2 <printf+0x52>
|
|
5c2: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
putc(fd, c);
|
|
5c8: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
5cb: 83 ec 04 sub $0x4,%esp
|
|
5ce: e9 2a ff ff ff jmp 4fd <printf+0xad>
|
|
5d3: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
5d7: 90 nop
|
|
s = "(null)";
|
|
5d8: ba ab 07 00 00 mov $0x7ab,%edx
|
|
while (*s != 0) {
|
|
5dd: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
5e0: b8 28 00 00 00 mov $0x28,%eax
|
|
5e5: 89 d3 mov %edx,%ebx
|
|
5e7: e9 74 ff ff ff jmp 560 <printf+0x110>
|
|
5ec: 66 90 xchg %ax,%ax
|
|
5ee: 66 90 xchg %ax,%ax
|
|
|
|
000005f0 <free>:
|
|
typedef union header Header;
|
|
|
|
static Header base;
|
|
static Header *freep;
|
|
|
|
void free(void *ap) {
|
|
5f0: 55 push %ebp
|
|
Header *bp, *p;
|
|
|
|
bp = (Header*)ap - 1;
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
5f1: a1 c0 0a 00 00 mov 0xac0,%eax
|
|
void free(void *ap) {
|
|
5f6: 89 e5 mov %esp,%ebp
|
|
5f8: 57 push %edi
|
|
5f9: 56 push %esi
|
|
5fa: 53 push %ebx
|
|
5fb: 8b 5d 08 mov 0x8(%ebp),%ebx
|
|
bp = (Header*)ap - 1;
|
|
5fe: 8d 4b f8 lea -0x8(%ebx),%ecx
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
601: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
608: 89 c2 mov %eax,%edx
|
|
60a: 8b 00 mov (%eax),%eax
|
|
60c: 39 ca cmp %ecx,%edx
|
|
60e: 73 30 jae 640 <free+0x50>
|
|
610: 39 c1 cmp %eax,%ecx
|
|
612: 72 04 jb 618 <free+0x28>
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
614: 39 c2 cmp %eax,%edx
|
|
616: 72 f0 jb 608 <free+0x18>
|
|
break;
|
|
}
|
|
}
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
618: 8b 73 fc mov -0x4(%ebx),%esi
|
|
61b: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
61e: 39 f8 cmp %edi,%eax
|
|
620: 74 30 je 652 <free+0x62>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
622: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
}
|
|
else {
|
|
bp->s.ptr = p->s.ptr;
|
|
}
|
|
if (p + p->s.size == bp) {
|
|
625: 8b 42 04 mov 0x4(%edx),%eax
|
|
628: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
62b: 39 f1 cmp %esi,%ecx
|
|
62d: 74 3a je 669 <free+0x79>
|
|
p->s.size += bp->s.size;
|
|
p->s.ptr = bp->s.ptr;
|
|
62f: 89 0a mov %ecx,(%edx)
|
|
}
|
|
else {
|
|
p->s.ptr = bp;
|
|
}
|
|
freep = p;
|
|
}
|
|
631: 5b pop %ebx
|
|
freep = p;
|
|
632: 89 15 c0 0a 00 00 mov %edx,0xac0
|
|
}
|
|
638: 5e pop %esi
|
|
639: 5f pop %edi
|
|
63a: 5d pop %ebp
|
|
63b: c3 ret
|
|
63c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
640: 39 c2 cmp %eax,%edx
|
|
642: 72 c4 jb 608 <free+0x18>
|
|
644: 39 c1 cmp %eax,%ecx
|
|
646: 73 c0 jae 608 <free+0x18>
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
648: 8b 73 fc mov -0x4(%ebx),%esi
|
|
64b: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
64e: 39 f8 cmp %edi,%eax
|
|
650: 75 d0 jne 622 <free+0x32>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
652: 03 70 04 add 0x4(%eax),%esi
|
|
655: 89 73 fc mov %esi,-0x4(%ebx)
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
658: 8b 02 mov (%edx),%eax
|
|
65a: 8b 00 mov (%eax),%eax
|
|
65c: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
if (p + p->s.size == bp) {
|
|
65f: 8b 42 04 mov 0x4(%edx),%eax
|
|
662: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
665: 39 f1 cmp %esi,%ecx
|
|
667: 75 c6 jne 62f <free+0x3f>
|
|
p->s.size += bp->s.size;
|
|
669: 03 43 fc add -0x4(%ebx),%eax
|
|
freep = p;
|
|
66c: 89 15 c0 0a 00 00 mov %edx,0xac0
|
|
p->s.size += bp->s.size;
|
|
672: 89 42 04 mov %eax,0x4(%edx)
|
|
p->s.ptr = bp->s.ptr;
|
|
675: 8b 4b f8 mov -0x8(%ebx),%ecx
|
|
678: 89 0a mov %ecx,(%edx)
|
|
}
|
|
67a: 5b pop %ebx
|
|
67b: 5e pop %esi
|
|
67c: 5f pop %edi
|
|
67d: 5d pop %ebp
|
|
67e: c3 ret
|
|
67f: 90 nop
|
|
|
|
00000680 <malloc>:
|
|
hp->s.size = nu;
|
|
free((void*)(hp + 1));
|
|
return freep;
|
|
}
|
|
|
|
void* malloc(uint nbytes) {
|
|
680: 55 push %ebp
|
|
681: 89 e5 mov %esp,%ebp
|
|
683: 57 push %edi
|
|
684: 56 push %esi
|
|
685: 53 push %ebx
|
|
686: 83 ec 1c sub $0x1c,%esp
|
|
Header *p, *prevp;
|
|
uint nunits;
|
|
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
689: 8b 45 08 mov 0x8(%ebp),%eax
|
|
if ((prevp = freep) == 0) {
|
|
68c: 8b 3d c0 0a 00 00 mov 0xac0,%edi
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
692: 8d 70 07 lea 0x7(%eax),%esi
|
|
695: c1 ee 03 shr $0x3,%esi
|
|
698: 83 c6 01 add $0x1,%esi
|
|
if ((prevp = freep) == 0) {
|
|
69b: 85 ff test %edi,%edi
|
|
69d: 0f 84 9d 00 00 00 je 740 <malloc+0xc0>
|
|
base.s.ptr = freep = prevp = &base;
|
|
base.s.size = 0;
|
|
}
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
6a3: 8b 17 mov (%edi),%edx
|
|
if (p->s.size >= nunits) {
|
|
6a5: 8b 4a 04 mov 0x4(%edx),%ecx
|
|
6a8: 39 f1 cmp %esi,%ecx
|
|
6aa: 73 6a jae 716 <malloc+0x96>
|
|
6ac: bb 00 10 00 00 mov $0x1000,%ebx
|
|
6b1: 39 de cmp %ebx,%esi
|
|
6b3: 0f 43 de cmovae %esi,%ebx
|
|
p = sbrk(nu * sizeof(Header));
|
|
6b6: 8d 04 dd 00 00 00 00 lea 0x0(,%ebx,8),%eax
|
|
6bd: 89 45 e4 mov %eax,-0x1c(%ebp)
|
|
6c0: eb 17 jmp 6d9 <malloc+0x59>
|
|
6c2: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
6c8: 8b 02 mov (%edx),%eax
|
|
if (p->s.size >= nunits) {
|
|
6ca: 8b 48 04 mov 0x4(%eax),%ecx
|
|
6cd: 39 f1 cmp %esi,%ecx
|
|
6cf: 73 4f jae 720 <malloc+0xa0>
|
|
p->s.size = nunits;
|
|
}
|
|
freep = prevp;
|
|
return (void*)(p + 1);
|
|
}
|
|
if (p == freep) {
|
|
6d1: 8b 3d c0 0a 00 00 mov 0xac0,%edi
|
|
6d7: 89 c2 mov %eax,%edx
|
|
6d9: 39 d7 cmp %edx,%edi
|
|
6db: 75 eb jne 6c8 <malloc+0x48>
|
|
p = sbrk(nu * sizeof(Header));
|
|
6dd: 83 ec 0c sub $0xc,%esp
|
|
6e0: ff 75 e4 push -0x1c(%ebp)
|
|
6e3: e8 4b fc ff ff call 333 <sbrk>
|
|
if (p == (char*)-1) {
|
|
6e8: 83 c4 10 add $0x10,%esp
|
|
6eb: 83 f8 ff cmp $0xffffffff,%eax
|
|
6ee: 74 1c je 70c <malloc+0x8c>
|
|
hp->s.size = nu;
|
|
6f0: 89 58 04 mov %ebx,0x4(%eax)
|
|
free((void*)(hp + 1));
|
|
6f3: 83 ec 0c sub $0xc,%esp
|
|
6f6: 83 c0 08 add $0x8,%eax
|
|
6f9: 50 push %eax
|
|
6fa: e8 f1 fe ff ff call 5f0 <free>
|
|
return freep;
|
|
6ff: 8b 15 c0 0a 00 00 mov 0xac0,%edx
|
|
if ((p = morecore(nunits)) == 0) {
|
|
705: 83 c4 10 add $0x10,%esp
|
|
708: 85 d2 test %edx,%edx
|
|
70a: 75 bc jne 6c8 <malloc+0x48>
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
70c: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return 0;
|
|
70f: 31 c0 xor %eax,%eax
|
|
}
|
|
711: 5b pop %ebx
|
|
712: 5e pop %esi
|
|
713: 5f pop %edi
|
|
714: 5d pop %ebp
|
|
715: c3 ret
|
|
if (p->s.size >= nunits) {
|
|
716: 89 d0 mov %edx,%eax
|
|
718: 89 fa mov %edi,%edx
|
|
71a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
if (p->s.size == nunits) {
|
|
720: 39 ce cmp %ecx,%esi
|
|
722: 74 4c je 770 <malloc+0xf0>
|
|
p->s.size -= nunits;
|
|
724: 29 f1 sub %esi,%ecx
|
|
726: 89 48 04 mov %ecx,0x4(%eax)
|
|
p += p->s.size;
|
|
729: 8d 04 c8 lea (%eax,%ecx,8),%eax
|
|
p->s.size = nunits;
|
|
72c: 89 70 04 mov %esi,0x4(%eax)
|
|
freep = prevp;
|
|
72f: 89 15 c0 0a 00 00 mov %edx,0xac0
|
|
}
|
|
735: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return (void*)(p + 1);
|
|
738: 83 c0 08 add $0x8,%eax
|
|
}
|
|
73b: 5b pop %ebx
|
|
73c: 5e pop %esi
|
|
73d: 5f pop %edi
|
|
73e: 5d pop %ebp
|
|
73f: c3 ret
|
|
base.s.ptr = freep = prevp = &base;
|
|
740: c7 05 c0 0a 00 00 c4 movl $0xac4,0xac0
|
|
747: 0a 00 00
|
|
base.s.size = 0;
|
|
74a: bf c4 0a 00 00 mov $0xac4,%edi
|
|
base.s.ptr = freep = prevp = &base;
|
|
74f: c7 05 c4 0a 00 00 c4 movl $0xac4,0xac4
|
|
756: 0a 00 00
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
759: 89 fa mov %edi,%edx
|
|
base.s.size = 0;
|
|
75b: c7 05 c8 0a 00 00 00 movl $0x0,0xac8
|
|
762: 00 00 00
|
|
if (p->s.size >= nunits) {
|
|
765: e9 42 ff ff ff jmp 6ac <malloc+0x2c>
|
|
76a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
prevp->s.ptr = p->s.ptr;
|
|
770: 8b 08 mov (%eax),%ecx
|
|
772: 89 0a mov %ecx,(%edx)
|
|
774: eb b9 jmp 72f <malloc+0xaf>
|