1387 lines
48 KiB
NASM
1387 lines
48 KiB
NASM
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_maze: file format elf32-i386
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Disassembly of section .text:
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00000000 <main>:
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int range = end - start + 1;
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return (rngnumber() + seed) % (range) + start;
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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: 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 39 mov (%ecx),%edi
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16: 8b 71 04 mov 0x4(%ecx),%esi
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int lines = 1000;
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int seed = getpid();
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19: e8 5d 04 00 00 call 47b <getpid>
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for (int i = 1; i < argc; i++) {
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1e: 83 ff 01 cmp $0x1,%edi
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21: 7e 6f jle 92 <main+0x92>
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23: bb 01 00 00 00 mov $0x1,%ebx
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28: eb 3b jmp 65 <main+0x65>
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2a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
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if (strcmp(argv[i], "-l") == 0)
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{
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lines = atoi(argv[i + 1]);
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}
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else if (strcmp(argv[i], "-s") == 0)
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30: 83 ec 08 sub $0x8,%esp
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33: 68 db 08 00 00 push $0x8db
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38: ff 34 9e push (%esi,%ebx,4)
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3b: e8 d0 01 00 00 call 210 <strcmp>
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40: 83 c4 10 add $0x10,%esp
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43: 85 c0 test %eax,%eax
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45: 74 35 je 7c <main+0x7c>
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{
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seed = atoi(argv[i + 1]);
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}
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else if (strcmp(argv[i], "-help") == 0)
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47: 83 ec 08 sub $0x8,%esp
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4a: 68 de 08 00 00 push $0x8de
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4f: ff 34 9e push (%esi,%ebx,4)
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52: e8 b9 01 00 00 call 210 <strcmp>
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57: 83 c4 10 add $0x10,%esp
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5a: 85 c0 test %eax,%eax
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5c: 74 69 je c7 <main+0xc7>
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for (int i = 1; i < argc; i++) {
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5e: 83 c3 01 add $0x1,%ebx
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61: 39 df cmp %ebx,%edi
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63: 74 2d je 92 <main+0x92>
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if (strcmp(argv[i], "-l") == 0)
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65: 83 ec 08 sub $0x8,%esp
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68: 68 d8 08 00 00 push $0x8d8
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6d: ff 34 9e push (%esi,%ebx,4)
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70: e8 9b 01 00 00 call 210 <strcmp>
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75: 83 c4 10 add $0x10,%esp
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78: 85 c0 test %eax,%eax
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7a: 75 b4 jne 30 <main+0x30>
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seed = atoi(argv[i + 1]);
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7c: 83 ec 0c sub $0xc,%esp
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7f: ff 74 9e 04 push 0x4(%esi,%ebx,4)
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for (int i = 1; i < argc; i++) {
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83: 83 c3 01 add $0x1,%ebx
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seed = atoi(argv[i + 1]);
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86: e8 35 03 00 00 call 3c0 <atoi>
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8b: 83 c4 10 add $0x10,%esp
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for (int i = 1; i < argc; i++) {
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8e: 39 df cmp %ebx,%edi
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90: 75 d3 jne 65 <main+0x65>
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exit();
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return 0;
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}
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}
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cls();
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92: e8 5c 04 00 00 call 4f3 <cls>
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printf(1, "Start Maze (DISABLED)\n");
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97: 83 ec 08 sub $0x8,%esp
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9a: 68 ee 08 00 00 push $0x8ee
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9f: 6a 01 push $0x1
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a1: e8 0a 05 00 00 call 5b0 <printf>
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printf(1, "This does not work on the azure servers, but it would generate a random x lines of characters to look like a maze, similar to the old c64 basic program.\n");
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a6: 58 pop %eax
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a7: 5a pop %edx
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a8: 68 ac 09 00 00 push $0x9ac
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ad: 6a 01 push $0x1
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af: e8 fc 04 00 00 call 5b0 <printf>
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printf(1, "I could have used the slashes but they look aweful in this font so use the count app instead.\n\n");
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b4: 59 pop %ecx
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b5: 5b pop %ebx
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b6: 68 48 0a 00 00 push $0xa48
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bb: 6a 01 push $0x1
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bd: e8 ee 04 00 00 call 5b0 <printf>
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exit();
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c2: e8 6c 03 00 00 call 433 <exit>
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printf(1, "Generates X lines of random maze.\n");
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c7: 56 push %esi
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c8: 56 push %esi
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c9: 68 08 09 00 00 push $0x908
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ce: 6a 01 push $0x1
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d0: e8 db 04 00 00 call 5b0 <printf>
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printf(1, "Options:\n");
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d5: 5f pop %edi
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d6: 58 pop %eax
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d7: 68 e4 08 00 00 push $0x8e4
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dc: 6a 01 push $0x1
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de: e8 cd 04 00 00 call 5b0 <printf>
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printf(1, "-l [Number] : Sets number of lines to generate for the maze.\n");
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e3: 58 pop %eax
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e4: 5a pop %edx
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e5: 68 2c 09 00 00 push $0x92c
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ea: 6a 01 push $0x1
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ec: e8 bf 04 00 00 call 5b0 <printf>
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printf(1, "-s [Number] : Sets the current seed for the random function.\n");
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f1: 59 pop %ecx
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f2: 5b pop %ebx
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f3: 68 6c 09 00 00 push $0x96c
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f8: 6a 01 push $0x1
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fa: e8 b1 04 00 00 call 5b0 <printf>
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exit();
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ff: e8 2f 03 00 00 call 433 <exit>
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104: 66 90 xchg %ax,%ax
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106: 66 90 xchg %ax,%ax
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108: 66 90 xchg %ax,%ax
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10a: 66 90 xchg %ax,%ax
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10c: 66 90 xchg %ax,%ax
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10e: 66 90 xchg %ax,%ax
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00000110 <rngnumber>:
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b = ((z1 << 6) ^ z1) >> 13;
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110: 8b 0d 1c 0e 00 00 mov 0xe1c,%ecx
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b = ((z2 << 2) ^ z2) >> 27;
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116: a1 18 0e 00 00 mov 0xe18,%eax
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{
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11b: 55 push %ebp
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b = ((z1 << 6) ^ z1) >> 13;
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11c: 89 ca mov %ecx,%edx
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11e: c1 e2 06 shl $0x6,%edx
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{
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121: 89 e5 mov %esp,%ebp
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123: 56 push %esi
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b = ((z4 << 3) ^ z4) >> 12;
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124: 8b 35 10 0e 00 00 mov 0xe10,%esi
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b = ((z1 << 6) ^ z1) >> 13;
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12a: 31 ca xor %ecx,%edx
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z1 = ((z1 & 4294967294U) << 18) ^ b;
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12c: c1 e1 12 shl $0x12,%ecx
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{
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12f: 53 push %ebx
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z1 = ((z1 & 4294967294U) << 18) ^ b;
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130: 81 e1 00 00 f8 ff and $0xfff80000,%ecx
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b = ((z1 << 6) ^ z1) >> 13;
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136: c1 ea 0d shr $0xd,%edx
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z1 = ((z1 & 4294967294U) << 18) ^ b;
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139: 31 ca xor %ecx,%edx
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b = ((z2 << 2) ^ z2) >> 27;
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13b: 8d 0c 85 00 00 00 00 lea 0x0(,%eax,4),%ecx
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142: 31 c8 xor %ecx,%eax
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z2 = ((z2 & 4294967288U) << 2) ^ b;
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144: 83 e1 e0 and $0xffffffe0,%ecx
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z1 = ((z1 & 4294967294U) << 18) ^ b;
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147: 89 15 1c 0e 00 00 mov %edx,0xe1c
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b = ((z2 << 2) ^ z2) >> 27;
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14d: c1 e8 1b shr $0x1b,%eax
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z2 = ((z2 & 4294967288U) << 2) ^ b;
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150: 31 c8 xor %ecx,%eax
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b = ((z3 << 13) ^ z3) >> 21;
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152: 8b 0d 14 0e 00 00 mov 0xe14,%ecx
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z2 = ((z2 & 4294967288U) << 2) ^ b;
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158: a3 18 0e 00 00 mov %eax,0xe18
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return (z1 ^ z2 ^ z3 ^ z4) / 2;
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15d: 31 d0 xor %edx,%eax
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b = ((z3 << 13) ^ z3) >> 21;
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15f: 89 cb mov %ecx,%ebx
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161: c1 e3 0d shl $0xd,%ebx
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164: 31 cb xor %ecx,%ebx
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z3 = ((z3 & 4294967280U) << 7) ^ b;
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166: c1 e1 07 shl $0x7,%ecx
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169: 81 e1 00 f8 ff ff and $0xfffff800,%ecx
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b = ((z3 << 13) ^ z3) >> 21;
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16f: c1 eb 15 shr $0x15,%ebx
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z3 = ((z3 & 4294967280U) << 7) ^ b;
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172: 31 cb xor %ecx,%ebx
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b = ((z4 << 3) ^ z4) >> 12;
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174: 8d 0c f5 00 00 00 00 lea 0x0(,%esi,8),%ecx
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17b: 31 f1 xor %esi,%ecx
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z4 = ((z4 & 4294967168U) << 13) ^ b;
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17d: c1 e6 0d shl $0xd,%esi
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return (z1 ^ z2 ^ z3 ^ z4) / 2;
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180: 31 d8 xor %ebx,%eax
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z3 = ((z3 & 4294967280U) << 7) ^ b;
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182: 89 1d 14 0e 00 00 mov %ebx,0xe14
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z4 = ((z4 & 4294967168U) << 13) ^ b;
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188: 81 e6 00 00 f0 ff and $0xfff00000,%esi
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b = ((z4 << 3) ^ z4) >> 12;
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18e: c1 e9 0c shr $0xc,%ecx
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}
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191: 5b pop %ebx
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z4 = ((z4 & 4294967168U) << 13) ^ b;
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192: 31 f1 xor %esi,%ecx
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}
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194: 5e pop %esi
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195: 5d pop %ebp
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return (z1 ^ z2 ^ z3 ^ z4) / 2;
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196: 31 c8 xor %ecx,%eax
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z4 = ((z4 & 4294967168U) << 13) ^ b;
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198: 89 0d 10 0e 00 00 mov %ecx,0xe10
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return (z1 ^ z2 ^ z3 ^ z4) / 2;
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19e: d1 e8 shr %eax
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}
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1a0: c3 ret
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1a1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1a8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1af: 90 nop
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000001b0 <rngrange>:
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{
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1b0: 55 push %ebp
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1b1: 89 e5 mov %esp,%ebp
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1b3: 56 push %esi
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1b4: 8b 75 08 mov 0x8(%ebp),%esi
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1b7: 53 push %ebx
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1b8: 8b 5d 0c mov 0xc(%ebp),%ebx
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if (end < start)
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1bb: 39 f3 cmp %esi,%ebx
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1bd: 7d 06 jge 1c5 <rngrange+0x15>
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1bf: 89 f0 mov %esi,%eax
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1c1: 89 de mov %ebx,%esi
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1c3: 89 c3 mov %eax,%ebx
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return (rngnumber() + seed) % (range) + start;
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1c5: e8 46 ff ff ff call 110 <rngnumber>
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int range = end - start + 1;
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1ca: 29 f3 sub %esi,%ebx
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return (rngnumber() + seed) % (range) + start;
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1cc: 03 45 10 add 0x10(%ebp),%eax
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1cf: 31 d2 xor %edx,%edx
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int range = end - start + 1;
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1d1: 83 c3 01 add $0x1,%ebx
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return (rngnumber() + seed) % (range) + start;
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1d4: f7 f3 div %ebx
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}
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1d6: 5b pop %ebx
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return (rngnumber() + seed) % (range) + start;
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1d7: 8d 04 32 lea (%edx,%esi,1),%eax
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}
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1da: 5e pop %esi
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1db: 5d pop %ebp
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1dc: c3 ret
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1dd: 66 90 xchg %ax,%ax
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1df: 90 nop
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000001e0 <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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1e0: 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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1e1: 31 c0 xor %eax,%eax
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char*strcpy(char *s, const char *t) {
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1e3: 89 e5 mov %esp,%ebp
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1e5: 53 push %ebx
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1e6: 8b 4d 08 mov 0x8(%ebp),%ecx
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1e9: 8b 5d 0c mov 0xc(%ebp),%ebx
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1ec: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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while ((*s++ = *t++) != 0) {
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1f0: 0f b6 14 03 movzbl (%ebx,%eax,1),%edx
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1f4: 88 14 01 mov %dl,(%ecx,%eax,1)
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1f7: 83 c0 01 add $0x1,%eax
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1fa: 84 d2 test %dl,%dl
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1fc: 75 f2 jne 1f0 <strcpy+0x10>
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;
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}
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return os;
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}
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1fe: 8b 5d fc mov -0x4(%ebp),%ebx
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201: 89 c8 mov %ecx,%eax
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203: c9 leave
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204: c3 ret
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205: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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20c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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00000210 <strcmp>:
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int strcmp(const char *p, const char *q) {
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210: 55 push %ebp
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211: 89 e5 mov %esp,%ebp
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213: 53 push %ebx
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214: 8b 55 08 mov 0x8(%ebp),%edx
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217: 8b 4d 0c mov 0xc(%ebp),%ecx
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while (*p && *p == *q) {
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21a: 0f b6 02 movzbl (%edx),%eax
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21d: 84 c0 test %al,%al
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21f: 75 17 jne 238 <strcmp+0x28>
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221: eb 3a jmp 25d <strcmp+0x4d>
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223: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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227: 90 nop
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228: 0f b6 42 01 movzbl 0x1(%edx),%eax
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p++, q++;
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22c: 83 c2 01 add $0x1,%edx
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22f: 8d 59 01 lea 0x1(%ecx),%ebx
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while (*p && *p == *q) {
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232: 84 c0 test %al,%al
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234: 74 1a je 250 <strcmp+0x40>
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p++, q++;
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236: 89 d9 mov %ebx,%ecx
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while (*p && *p == *q) {
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238: 0f b6 19 movzbl (%ecx),%ebx
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23b: 38 c3 cmp %al,%bl
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23d: 74 e9 je 228 <strcmp+0x18>
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}
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return (uchar) * p - (uchar) * q;
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23f: 29 d8 sub %ebx,%eax
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}
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241: 8b 5d fc mov -0x4(%ebp),%ebx
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244: c9 leave
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245: c3 ret
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246: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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24d: 8d 76 00 lea 0x0(%esi),%esi
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return (uchar) * p - (uchar) * q;
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250: 0f b6 59 01 movzbl 0x1(%ecx),%ebx
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254: 31 c0 xor %eax,%eax
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256: 29 d8 sub %ebx,%eax
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}
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258: 8b 5d fc mov -0x4(%ebp),%ebx
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25b: c9 leave
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25c: c3 ret
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return (uchar) * p - (uchar) * q;
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25d: 0f b6 19 movzbl (%ecx),%ebx
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260: 31 c0 xor %eax,%eax
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262: eb db jmp 23f <strcmp+0x2f>
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264: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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26b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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26f: 90 nop
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00000270 <strlen>:
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uint strlen(const char *s) {
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270: 55 push %ebp
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271: 89 e5 mov %esp,%ebp
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273: 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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276: 80 3a 00 cmpb $0x0,(%edx)
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279: 74 15 je 290 <strlen+0x20>
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27b: 31 c0 xor %eax,%eax
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27d: 8d 76 00 lea 0x0(%esi),%esi
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280: 83 c0 01 add $0x1,%eax
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283: 80 3c 02 00 cmpb $0x0,(%edx,%eax,1)
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287: 89 c1 mov %eax,%ecx
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289: 75 f5 jne 280 <strlen+0x10>
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;
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}
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return n;
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}
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28b: 89 c8 mov %ecx,%eax
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28d: 5d pop %ebp
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28e: c3 ret
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28f: 90 nop
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for (n = 0; s[n]; n++) {
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290: 31 c9 xor %ecx,%ecx
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}
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292: 5d pop %ebp
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293: 89 c8 mov %ecx,%eax
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295: c3 ret
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296: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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29d: 8d 76 00 lea 0x0(%esi),%esi
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000002a0 <memset>:
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void* memset(void *dst, int c, uint n) {
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2a0: 55 push %ebp
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2a1: 89 e5 mov %esp,%ebp
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2a3: 57 push %edi
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2a4: 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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2a7: 8b 4d 10 mov 0x10(%ebp),%ecx
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2aa: 8b 45 0c mov 0xc(%ebp),%eax
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2ad: 89 d7 mov %edx,%edi
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2af: fc cld
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2b0: 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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2b2: 8b 7d fc mov -0x4(%ebp),%edi
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2b5: 89 d0 mov %edx,%eax
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2b7: c9 leave
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2b8: c3 ret
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2b9: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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000002c0 <strchr>:
|
|
|
|
char* strchr(const char *s, char c) {
|
|
2c0: 55 push %ebp
|
|
2c1: 89 e5 mov %esp,%ebp
|
|
2c3: 8b 45 08 mov 0x8(%ebp),%eax
|
|
2c6: 0f b6 4d 0c movzbl 0xc(%ebp),%ecx
|
|
for (; *s; s++) {
|
|
2ca: 0f b6 10 movzbl (%eax),%edx
|
|
2cd: 84 d2 test %dl,%dl
|
|
2cf: 75 12 jne 2e3 <strchr+0x23>
|
|
2d1: eb 1d jmp 2f0 <strchr+0x30>
|
|
2d3: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
2d7: 90 nop
|
|
2d8: 0f b6 50 01 movzbl 0x1(%eax),%edx
|
|
2dc: 83 c0 01 add $0x1,%eax
|
|
2df: 84 d2 test %dl,%dl
|
|
2e1: 74 0d je 2f0 <strchr+0x30>
|
|
if (*s == c) {
|
|
2e3: 38 d1 cmp %dl,%cl
|
|
2e5: 75 f1 jne 2d8 <strchr+0x18>
|
|
return (char*)s;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
2e7: 5d pop %ebp
|
|
2e8: c3 ret
|
|
2e9: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
return 0;
|
|
2f0: 31 c0 xor %eax,%eax
|
|
}
|
|
2f2: 5d pop %ebp
|
|
2f3: c3 ret
|
|
2f4: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
2fb: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
2ff: 90 nop
|
|
|
|
00000300 <gets>:
|
|
|
|
char* gets(char *buf, int max) {
|
|
300: 55 push %ebp
|
|
301: 89 e5 mov %esp,%ebp
|
|
303: 57 push %edi
|
|
304: 56 push %esi
|
|
int i, cc;
|
|
char c;
|
|
|
|
for (i = 0; i + 1 < max;) {
|
|
cc = read(0, &c, 1);
|
|
305: 8d 7d e7 lea -0x19(%ebp),%edi
|
|
char* gets(char *buf, int max) {
|
|
308: 53 push %ebx
|
|
for (i = 0; i + 1 < max;) {
|
|
309: 31 db xor %ebx,%ebx
|
|
char* gets(char *buf, int max) {
|
|
30b: 83 ec 1c sub $0x1c,%esp
|
|
for (i = 0; i + 1 < max;) {
|
|
30e: eb 27 jmp 337 <gets+0x37>
|
|
cc = read(0, &c, 1);
|
|
310: 83 ec 04 sub $0x4,%esp
|
|
313: 6a 01 push $0x1
|
|
315: 57 push %edi
|
|
316: 6a 00 push $0x0
|
|
318: e8 2e 01 00 00 call 44b <read>
|
|
if (cc < 1) {
|
|
31d: 83 c4 10 add $0x10,%esp
|
|
320: 85 c0 test %eax,%eax
|
|
322: 7e 1d jle 341 <gets+0x41>
|
|
break;
|
|
}
|
|
buf[i++] = c;
|
|
324: 0f b6 45 e7 movzbl -0x19(%ebp),%eax
|
|
328: 8b 55 08 mov 0x8(%ebp),%edx
|
|
32b: 88 44 1a ff mov %al,-0x1(%edx,%ebx,1)
|
|
if (c == '\n' || c == '\r') {
|
|
32f: 3c 0a cmp $0xa,%al
|
|
331: 74 1d je 350 <gets+0x50>
|
|
333: 3c 0d cmp $0xd,%al
|
|
335: 74 19 je 350 <gets+0x50>
|
|
for (i = 0; i + 1 < max;) {
|
|
337: 89 de mov %ebx,%esi
|
|
339: 83 c3 01 add $0x1,%ebx
|
|
33c: 3b 5d 0c cmp 0xc(%ebp),%ebx
|
|
33f: 7c cf jl 310 <gets+0x10>
|
|
break;
|
|
}
|
|
}
|
|
buf[i] = '\0';
|
|
341: 8b 45 08 mov 0x8(%ebp),%eax
|
|
344: c6 04 30 00 movb $0x0,(%eax,%esi,1)
|
|
return buf;
|
|
}
|
|
348: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
34b: 5b pop %ebx
|
|
34c: 5e pop %esi
|
|
34d: 5f pop %edi
|
|
34e: 5d pop %ebp
|
|
34f: c3 ret
|
|
buf[i] = '\0';
|
|
350: 8b 45 08 mov 0x8(%ebp),%eax
|
|
353: 89 de mov %ebx,%esi
|
|
355: c6 04 30 00 movb $0x0,(%eax,%esi,1)
|
|
}
|
|
359: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
35c: 5b pop %ebx
|
|
35d: 5e pop %esi
|
|
35e: 5f pop %edi
|
|
35f: 5d pop %ebp
|
|
360: c3 ret
|
|
361: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
368: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
36f: 90 nop
|
|
|
|
00000370 <stat>:
|
|
|
|
int stat(const char *n, struct stat *st) {
|
|
370: 55 push %ebp
|
|
371: 89 e5 mov %esp,%ebp
|
|
373: 56 push %esi
|
|
374: 53 push %ebx
|
|
int fd;
|
|
int r;
|
|
|
|
fd = open(n, O_RDONLY);
|
|
375: 83 ec 08 sub $0x8,%esp
|
|
378: 6a 00 push $0x0
|
|
37a: ff 75 08 push 0x8(%ebp)
|
|
37d: e8 19 01 00 00 call 49b <open>
|
|
if (fd < 0) {
|
|
382: 83 c4 10 add $0x10,%esp
|
|
385: 85 c0 test %eax,%eax
|
|
387: 78 27 js 3b0 <stat+0x40>
|
|
return -1;
|
|
}
|
|
r = fstat(fd, st);
|
|
389: 83 ec 08 sub $0x8,%esp
|
|
38c: ff 75 0c push 0xc(%ebp)
|
|
38f: 89 c3 mov %eax,%ebx
|
|
391: 50 push %eax
|
|
392: e8 cc 00 00 00 call 463 <fstat>
|
|
close(fd);
|
|
397: 89 1c 24 mov %ebx,(%esp)
|
|
r = fstat(fd, st);
|
|
39a: 89 c6 mov %eax,%esi
|
|
close(fd);
|
|
39c: e8 2a 01 00 00 call 4cb <close>
|
|
return r;
|
|
3a1: 83 c4 10 add $0x10,%esp
|
|
}
|
|
3a4: 8d 65 f8 lea -0x8(%ebp),%esp
|
|
3a7: 89 f0 mov %esi,%eax
|
|
3a9: 5b pop %ebx
|
|
3aa: 5e pop %esi
|
|
3ab: 5d pop %ebp
|
|
3ac: c3 ret
|
|
3ad: 8d 76 00 lea 0x0(%esi),%esi
|
|
return -1;
|
|
3b0: be ff ff ff ff mov $0xffffffff,%esi
|
|
3b5: eb ed jmp 3a4 <stat+0x34>
|
|
3b7: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
3be: 66 90 xchg %ax,%ax
|
|
|
|
000003c0 <atoi>:
|
|
|
|
int atoi(const char *s) {
|
|
3c0: 55 push %ebp
|
|
3c1: 89 e5 mov %esp,%ebp
|
|
3c3: 53 push %ebx
|
|
3c4: 8b 55 08 mov 0x8(%ebp),%edx
|
|
int n;
|
|
|
|
n = 0;
|
|
while ('0' <= *s && *s <= '9') {
|
|
3c7: 0f be 02 movsbl (%edx),%eax
|
|
3ca: 8d 48 d0 lea -0x30(%eax),%ecx
|
|
3cd: 80 f9 09 cmp $0x9,%cl
|
|
n = 0;
|
|
3d0: b9 00 00 00 00 mov $0x0,%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
3d5: 77 1e ja 3f5 <atoi+0x35>
|
|
3d7: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
3de: 66 90 xchg %ax,%ax
|
|
n = n * 10 + *s++ - '0';
|
|
3e0: 83 c2 01 add $0x1,%edx
|
|
3e3: 8d 0c 89 lea (%ecx,%ecx,4),%ecx
|
|
3e6: 8d 4c 48 d0 lea -0x30(%eax,%ecx,2),%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
3ea: 0f be 02 movsbl (%edx),%eax
|
|
3ed: 8d 58 d0 lea -0x30(%eax),%ebx
|
|
3f0: 80 fb 09 cmp $0x9,%bl
|
|
3f3: 76 eb jbe 3e0 <atoi+0x20>
|
|
}
|
|
return n;
|
|
}
|
|
3f5: 8b 5d fc mov -0x4(%ebp),%ebx
|
|
3f8: 89 c8 mov %ecx,%eax
|
|
3fa: c9 leave
|
|
3fb: c3 ret
|
|
3fc: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
|
|
00000400 <memmove>:
|
|
|
|
void* memmove(void *vdst, const void *vsrc, int n) {
|
|
400: 55 push %ebp
|
|
401: 89 e5 mov %esp,%ebp
|
|
403: 57 push %edi
|
|
404: 8b 45 10 mov 0x10(%ebp),%eax
|
|
407: 8b 55 08 mov 0x8(%ebp),%edx
|
|
40a: 56 push %esi
|
|
40b: 8b 75 0c mov 0xc(%ebp),%esi
|
|
char *dst;
|
|
const char *src;
|
|
|
|
dst = vdst;
|
|
src = vsrc;
|
|
while (n-- > 0) {
|
|
40e: 85 c0 test %eax,%eax
|
|
410: 7e 13 jle 425 <memmove+0x25>
|
|
412: 01 d0 add %edx,%eax
|
|
dst = vdst;
|
|
414: 89 d7 mov %edx,%edi
|
|
416: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
41d: 8d 76 00 lea 0x0(%esi),%esi
|
|
*dst++ = *src++;
|
|
420: a4 movsb %ds:(%esi),%es:(%edi)
|
|
while (n-- > 0) {
|
|
421: 39 f8 cmp %edi,%eax
|
|
423: 75 fb jne 420 <memmove+0x20>
|
|
}
|
|
return vdst;
|
|
}
|
|
425: 5e pop %esi
|
|
426: 89 d0 mov %edx,%eax
|
|
428: 5f pop %edi
|
|
429: 5d pop %ebp
|
|
42a: c3 ret
|
|
|
|
0000042b <fork>:
|
|
name: \
|
|
movl $SYS_ ## name, %eax; \
|
|
int $T_SYSCALL; \
|
|
ret
|
|
|
|
SYSCALL(fork)
|
|
42b: b8 01 00 00 00 mov $0x1,%eax
|
|
430: cd 40 int $0x40
|
|
432: c3 ret
|
|
|
|
00000433 <exit>:
|
|
SYSCALL(exit)
|
|
433: b8 02 00 00 00 mov $0x2,%eax
|
|
438: cd 40 int $0x40
|
|
43a: c3 ret
|
|
|
|
0000043b <wait>:
|
|
SYSCALL(wait)
|
|
43b: b8 03 00 00 00 mov $0x3,%eax
|
|
440: cd 40 int $0x40
|
|
442: c3 ret
|
|
|
|
00000443 <pipe>:
|
|
SYSCALL(pipe)
|
|
443: b8 04 00 00 00 mov $0x4,%eax
|
|
448: cd 40 int $0x40
|
|
44a: c3 ret
|
|
|
|
0000044b <read>:
|
|
SYSCALL(read)
|
|
44b: b8 05 00 00 00 mov $0x5,%eax
|
|
450: cd 40 int $0x40
|
|
452: c3 ret
|
|
|
|
00000453 <kill>:
|
|
SYSCALL(kill)
|
|
453: b8 06 00 00 00 mov $0x6,%eax
|
|
458: cd 40 int $0x40
|
|
45a: c3 ret
|
|
|
|
0000045b <exec>:
|
|
SYSCALL(exec)
|
|
45b: b8 07 00 00 00 mov $0x7,%eax
|
|
460: cd 40 int $0x40
|
|
462: c3 ret
|
|
|
|
00000463 <fstat>:
|
|
SYSCALL(fstat)
|
|
463: b8 08 00 00 00 mov $0x8,%eax
|
|
468: cd 40 int $0x40
|
|
46a: c3 ret
|
|
|
|
0000046b <chdir>:
|
|
SYSCALL(chdir)
|
|
46b: b8 09 00 00 00 mov $0x9,%eax
|
|
470: cd 40 int $0x40
|
|
472: c3 ret
|
|
|
|
00000473 <dup>:
|
|
SYSCALL(dup)
|
|
473: b8 0a 00 00 00 mov $0xa,%eax
|
|
478: cd 40 int $0x40
|
|
47a: c3 ret
|
|
|
|
0000047b <getpid>:
|
|
SYSCALL(getpid)
|
|
47b: b8 0b 00 00 00 mov $0xb,%eax
|
|
480: cd 40 int $0x40
|
|
482: c3 ret
|
|
|
|
00000483 <sbrk>:
|
|
SYSCALL(sbrk)
|
|
483: b8 0c 00 00 00 mov $0xc,%eax
|
|
488: cd 40 int $0x40
|
|
48a: c3 ret
|
|
|
|
0000048b <sleep>:
|
|
SYSCALL(sleep)
|
|
48b: b8 0d 00 00 00 mov $0xd,%eax
|
|
490: cd 40 int $0x40
|
|
492: c3 ret
|
|
|
|
00000493 <uptime>:
|
|
SYSCALL(uptime)
|
|
493: b8 0e 00 00 00 mov $0xe,%eax
|
|
498: cd 40 int $0x40
|
|
49a: c3 ret
|
|
|
|
0000049b <open>:
|
|
SYSCALL(open)
|
|
49b: b8 0f 00 00 00 mov $0xf,%eax
|
|
4a0: cd 40 int $0x40
|
|
4a2: c3 ret
|
|
|
|
000004a3 <write>:
|
|
SYSCALL(write)
|
|
4a3: b8 10 00 00 00 mov $0x10,%eax
|
|
4a8: cd 40 int $0x40
|
|
4aa: c3 ret
|
|
|
|
000004ab <mknod>:
|
|
SYSCALL(mknod)
|
|
4ab: b8 11 00 00 00 mov $0x11,%eax
|
|
4b0: cd 40 int $0x40
|
|
4b2: c3 ret
|
|
|
|
000004b3 <unlink>:
|
|
SYSCALL(unlink)
|
|
4b3: b8 12 00 00 00 mov $0x12,%eax
|
|
4b8: cd 40 int $0x40
|
|
4ba: c3 ret
|
|
|
|
000004bb <link>:
|
|
SYSCALL(link)
|
|
4bb: b8 13 00 00 00 mov $0x13,%eax
|
|
4c0: cd 40 int $0x40
|
|
4c2: c3 ret
|
|
|
|
000004c3 <mkdir>:
|
|
SYSCALL(mkdir)
|
|
4c3: b8 14 00 00 00 mov $0x14,%eax
|
|
4c8: cd 40 int $0x40
|
|
4ca: c3 ret
|
|
|
|
000004cb <close>:
|
|
SYSCALL(close)
|
|
4cb: b8 15 00 00 00 mov $0x15,%eax
|
|
4d0: cd 40 int $0x40
|
|
4d2: c3 ret
|
|
|
|
000004d3 <getch>:
|
|
SYSCALL(getch)
|
|
4d3: b8 16 00 00 00 mov $0x16,%eax
|
|
4d8: cd 40 int $0x40
|
|
4da: c3 ret
|
|
|
|
000004db <greeting>:
|
|
SYSCALL(greeting)
|
|
4db: b8 17 00 00 00 mov $0x17,%eax
|
|
4e0: cd 40 int $0x40
|
|
4e2: c3 ret
|
|
|
|
000004e3 <shutdown>:
|
|
SYSCALL(shutdown)
|
|
4e3: b8 18 00 00 00 mov $0x18,%eax
|
|
4e8: cd 40 int $0x40
|
|
4ea: c3 ret
|
|
|
|
000004eb <screen>:
|
|
SYSCALL(screen)
|
|
4eb: b8 19 00 00 00 mov $0x19,%eax
|
|
4f0: cd 40 int $0x40
|
|
4f2: c3 ret
|
|
|
|
000004f3 <cls>:
|
|
SYSCALL(cls)
|
|
4f3: b8 1a 00 00 00 mov $0x1a,%eax
|
|
4f8: cd 40 int $0x40
|
|
4fa: c3 ret
|
|
4fb: 66 90 xchg %ax,%ax
|
|
4fd: 66 90 xchg %ax,%ax
|
|
4ff: 90 nop
|
|
|
|
00000500 <printint>:
|
|
|
|
static void putc(int fd, char c) {
|
|
write(fd, &c, 1);
|
|
}
|
|
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
500: 55 push %ebp
|
|
501: 89 e5 mov %esp,%ebp
|
|
503: 57 push %edi
|
|
504: 56 push %esi
|
|
505: 53 push %ebx
|
|
506: 83 ec 3c sub $0x3c,%esp
|
|
509: 89 4d c4 mov %ecx,-0x3c(%ebp)
|
|
uint x;
|
|
|
|
neg = 0;
|
|
if (sgn && xx < 0) {
|
|
neg = 1;
|
|
x = -xx;
|
|
50c: 89 d1 mov %edx,%ecx
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
50e: 89 45 b8 mov %eax,-0x48(%ebp)
|
|
if (sgn && xx < 0) {
|
|
511: 85 d2 test %edx,%edx
|
|
513: 0f 89 7f 00 00 00 jns 598 <printint+0x98>
|
|
519: f6 45 08 01 testb $0x1,0x8(%ebp)
|
|
51d: 74 79 je 598 <printint+0x98>
|
|
neg = 1;
|
|
51f: c7 45 bc 01 00 00 00 movl $0x1,-0x44(%ebp)
|
|
x = -xx;
|
|
526: f7 d9 neg %ecx
|
|
}
|
|
else {
|
|
x = xx;
|
|
}
|
|
|
|
i = 0;
|
|
528: 31 db xor %ebx,%ebx
|
|
52a: 8d 75 d7 lea -0x29(%ebp),%esi
|
|
52d: 8d 76 00 lea 0x0(%esi),%esi
|
|
do {
|
|
buf[i++] = digits[x % base];
|
|
530: 89 c8 mov %ecx,%eax
|
|
532: 31 d2 xor %edx,%edx
|
|
534: 89 cf mov %ecx,%edi
|
|
536: f7 75 c4 divl -0x3c(%ebp)
|
|
539: 0f b6 92 08 0b 00 00 movzbl 0xb08(%edx),%edx
|
|
540: 89 45 c0 mov %eax,-0x40(%ebp)
|
|
543: 89 d8 mov %ebx,%eax
|
|
545: 8d 5b 01 lea 0x1(%ebx),%ebx
|
|
}
|
|
while ((x /= base) != 0);
|
|
548: 8b 4d c0 mov -0x40(%ebp),%ecx
|
|
buf[i++] = digits[x % base];
|
|
54b: 88 14 1e mov %dl,(%esi,%ebx,1)
|
|
while ((x /= base) != 0);
|
|
54e: 39 7d c4 cmp %edi,-0x3c(%ebp)
|
|
551: 76 dd jbe 530 <printint+0x30>
|
|
if (neg) {
|
|
553: 8b 4d bc mov -0x44(%ebp),%ecx
|
|
556: 85 c9 test %ecx,%ecx
|
|
558: 74 0c je 566 <printint+0x66>
|
|
buf[i++] = '-';
|
|
55a: c6 44 1d d8 2d movb $0x2d,-0x28(%ebp,%ebx,1)
|
|
buf[i++] = digits[x % base];
|
|
55f: 89 d8 mov %ebx,%eax
|
|
buf[i++] = '-';
|
|
561: ba 2d 00 00 00 mov $0x2d,%edx
|
|
}
|
|
|
|
while (--i >= 0) {
|
|
566: 8b 7d b8 mov -0x48(%ebp),%edi
|
|
569: 8d 5c 05 d7 lea -0x29(%ebp,%eax,1),%ebx
|
|
56d: eb 07 jmp 576 <printint+0x76>
|
|
56f: 90 nop
|
|
putc(fd, buf[i]);
|
|
570: 0f b6 13 movzbl (%ebx),%edx
|
|
573: 83 eb 01 sub $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
576: 83 ec 04 sub $0x4,%esp
|
|
579: 88 55 d7 mov %dl,-0x29(%ebp)
|
|
57c: 6a 01 push $0x1
|
|
57e: 56 push %esi
|
|
57f: 57 push %edi
|
|
580: e8 1e ff ff ff call 4a3 <write>
|
|
while (--i >= 0) {
|
|
585: 83 c4 10 add $0x10,%esp
|
|
588: 39 de cmp %ebx,%esi
|
|
58a: 75 e4 jne 570 <printint+0x70>
|
|
}
|
|
}
|
|
58c: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
58f: 5b pop %ebx
|
|
590: 5e pop %esi
|
|
591: 5f pop %edi
|
|
592: 5d pop %ebp
|
|
593: c3 ret
|
|
594: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
neg = 0;
|
|
598: c7 45 bc 00 00 00 00 movl $0x0,-0x44(%ebp)
|
|
59f: eb 87 jmp 528 <printint+0x28>
|
|
5a1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
5a8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
5af: 90 nop
|
|
|
|
000005b0 <printf>:
|
|
|
|
// Print to the given fd. Only understands %d, %x, %p, %s.
|
|
void printf(int fd, const char *fmt, ...) {
|
|
5b0: 55 push %ebp
|
|
5b1: 89 e5 mov %esp,%ebp
|
|
5b3: 57 push %edi
|
|
5b4: 56 push %esi
|
|
5b5: 53 push %ebx
|
|
5b6: 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++) {
|
|
5b9: 8b 5d 0c mov 0xc(%ebp),%ebx
|
|
void printf(int fd, const char *fmt, ...) {
|
|
5bc: 8b 75 08 mov 0x8(%ebp),%esi
|
|
for (i = 0; fmt[i]; i++) {
|
|
5bf: 0f b6 13 movzbl (%ebx),%edx
|
|
5c2: 84 d2 test %dl,%dl
|
|
5c4: 74 6a je 630 <printf+0x80>
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
5c6: 8d 45 10 lea 0x10(%ebp),%eax
|
|
5c9: 83 c3 01 add $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
5cc: 8d 7d e7 lea -0x19(%ebp),%edi
|
|
state = 0;
|
|
5cf: 31 c9 xor %ecx,%ecx
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
5d1: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
5d4: eb 36 jmp 60c <printf+0x5c>
|
|
5d6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
5dd: 8d 76 00 lea 0x0(%esi),%esi
|
|
5e0: 89 4d d4 mov %ecx,-0x2c(%ebp)
|
|
c = fmt[i] & 0xff;
|
|
if (state == 0) {
|
|
if (c == '%') {
|
|
state = '%';
|
|
5e3: b9 25 00 00 00 mov $0x25,%ecx
|
|
if (c == '%') {
|
|
5e8: 83 f8 25 cmp $0x25,%eax
|
|
5eb: 74 15 je 602 <printf+0x52>
|
|
write(fd, &c, 1);
|
|
5ed: 83 ec 04 sub $0x4,%esp
|
|
5f0: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
5f3: 6a 01 push $0x1
|
|
5f5: 57 push %edi
|
|
5f6: 56 push %esi
|
|
5f7: e8 a7 fe ff ff call 4a3 <write>
|
|
5fc: 8b 4d d4 mov -0x2c(%ebp),%ecx
|
|
}
|
|
else {
|
|
putc(fd, c);
|
|
5ff: 83 c4 10 add $0x10,%esp
|
|
for (i = 0; fmt[i]; i++) {
|
|
602: 0f b6 13 movzbl (%ebx),%edx
|
|
605: 83 c3 01 add $0x1,%ebx
|
|
608: 84 d2 test %dl,%dl
|
|
60a: 74 24 je 630 <printf+0x80>
|
|
c = fmt[i] & 0xff;
|
|
60c: 0f b6 c2 movzbl %dl,%eax
|
|
if (state == 0) {
|
|
60f: 85 c9 test %ecx,%ecx
|
|
611: 74 cd je 5e0 <printf+0x30>
|
|
}
|
|
}
|
|
else if (state == '%') {
|
|
613: 83 f9 25 cmp $0x25,%ecx
|
|
616: 75 ea jne 602 <printf+0x52>
|
|
if (c == 'd') {
|
|
618: 83 f8 25 cmp $0x25,%eax
|
|
61b: 0f 84 07 01 00 00 je 728 <printf+0x178>
|
|
621: 83 e8 63 sub $0x63,%eax
|
|
624: 83 f8 15 cmp $0x15,%eax
|
|
627: 77 17 ja 640 <printf+0x90>
|
|
629: ff 24 85 b0 0a 00 00 jmp *0xab0(,%eax,4)
|
|
putc(fd, c);
|
|
}
|
|
state = 0;
|
|
}
|
|
}
|
|
}
|
|
630: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
633: 5b pop %ebx
|
|
634: 5e pop %esi
|
|
635: 5f pop %edi
|
|
636: 5d pop %ebp
|
|
637: c3 ret
|
|
638: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
63f: 90 nop
|
|
write(fd, &c, 1);
|
|
640: 83 ec 04 sub $0x4,%esp
|
|
643: 88 55 d4 mov %dl,-0x2c(%ebp)
|
|
646: 6a 01 push $0x1
|
|
648: 57 push %edi
|
|
649: 56 push %esi
|
|
64a: c6 45 e7 25 movb $0x25,-0x19(%ebp)
|
|
64e: e8 50 fe ff ff call 4a3 <write>
|
|
putc(fd, c);
|
|
653: 0f b6 55 d4 movzbl -0x2c(%ebp),%edx
|
|
write(fd, &c, 1);
|
|
657: 83 c4 0c add $0xc,%esp
|
|
65a: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
65d: 6a 01 push $0x1
|
|
65f: 57 push %edi
|
|
660: 56 push %esi
|
|
661: e8 3d fe ff ff call 4a3 <write>
|
|
putc(fd, c);
|
|
666: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
669: 31 c9 xor %ecx,%ecx
|
|
66b: eb 95 jmp 602 <printf+0x52>
|
|
66d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 16, 0);
|
|
670: 83 ec 0c sub $0xc,%esp
|
|
673: b9 10 00 00 00 mov $0x10,%ecx
|
|
678: 6a 00 push $0x0
|
|
67a: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
67d: 8b 10 mov (%eax),%edx
|
|
67f: 89 f0 mov %esi,%eax
|
|
681: e8 7a fe ff ff call 500 <printint>
|
|
ap++;
|
|
686: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
68a: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
68d: 31 c9 xor %ecx,%ecx
|
|
68f: e9 6e ff ff ff jmp 602 <printf+0x52>
|
|
694: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
s = (char*)*ap;
|
|
698: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
69b: 8b 10 mov (%eax),%edx
|
|
ap++;
|
|
69d: 83 c0 04 add $0x4,%eax
|
|
6a0: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
if (s == 0) {
|
|
6a3: 85 d2 test %edx,%edx
|
|
6a5: 0f 84 8d 00 00 00 je 738 <printf+0x188>
|
|
while (*s != 0) {
|
|
6ab: 0f b6 02 movzbl (%edx),%eax
|
|
state = 0;
|
|
6ae: 31 c9 xor %ecx,%ecx
|
|
while (*s != 0) {
|
|
6b0: 84 c0 test %al,%al
|
|
6b2: 0f 84 4a ff ff ff je 602 <printf+0x52>
|
|
6b8: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
6bb: 89 d3 mov %edx,%ebx
|
|
6bd: 8d 76 00 lea 0x0(%esi),%esi
|
|
write(fd, &c, 1);
|
|
6c0: 83 ec 04 sub $0x4,%esp
|
|
s++;
|
|
6c3: 83 c3 01 add $0x1,%ebx
|
|
6c6: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
6c9: 6a 01 push $0x1
|
|
6cb: 57 push %edi
|
|
6cc: 56 push %esi
|
|
6cd: e8 d1 fd ff ff call 4a3 <write>
|
|
while (*s != 0) {
|
|
6d2: 0f b6 03 movzbl (%ebx),%eax
|
|
6d5: 83 c4 10 add $0x10,%esp
|
|
6d8: 84 c0 test %al,%al
|
|
6da: 75 e4 jne 6c0 <printf+0x110>
|
|
state = 0;
|
|
6dc: 8b 5d d4 mov -0x2c(%ebp),%ebx
|
|
6df: 31 c9 xor %ecx,%ecx
|
|
6e1: e9 1c ff ff ff jmp 602 <printf+0x52>
|
|
6e6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
6ed: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 10, 1);
|
|
6f0: 83 ec 0c sub $0xc,%esp
|
|
6f3: b9 0a 00 00 00 mov $0xa,%ecx
|
|
6f8: 6a 01 push $0x1
|
|
6fa: e9 7b ff ff ff jmp 67a <printf+0xca>
|
|
6ff: 90 nop
|
|
putc(fd, *ap);
|
|
700: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
write(fd, &c, 1);
|
|
703: 83 ec 04 sub $0x4,%esp
|
|
putc(fd, *ap);
|
|
706: 8b 00 mov (%eax),%eax
|
|
write(fd, &c, 1);
|
|
708: 6a 01 push $0x1
|
|
70a: 57 push %edi
|
|
70b: 56 push %esi
|
|
putc(fd, *ap);
|
|
70c: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
70f: e8 8f fd ff ff call 4a3 <write>
|
|
ap++;
|
|
714: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
718: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
71b: 31 c9 xor %ecx,%ecx
|
|
71d: e9 e0 fe ff ff jmp 602 <printf+0x52>
|
|
722: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
putc(fd, c);
|
|
728: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
72b: 83 ec 04 sub $0x4,%esp
|
|
72e: e9 2a ff ff ff jmp 65d <printf+0xad>
|
|
733: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
737: 90 nop
|
|
s = "(null)";
|
|
738: ba a8 0a 00 00 mov $0xaa8,%edx
|
|
while (*s != 0) {
|
|
73d: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
740: b8 28 00 00 00 mov $0x28,%eax
|
|
745: 89 d3 mov %edx,%ebx
|
|
747: e9 74 ff ff ff jmp 6c0 <printf+0x110>
|
|
74c: 66 90 xchg %ax,%ax
|
|
74e: 66 90 xchg %ax,%ax
|
|
|
|
00000750 <free>:
|
|
typedef union header Header;
|
|
|
|
static Header base;
|
|
static Header *freep;
|
|
|
|
void free(void *ap) {
|
|
750: 55 push %ebp
|
|
Header *bp, *p;
|
|
|
|
bp = (Header*)ap - 1;
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
751: a1 20 0e 00 00 mov 0xe20,%eax
|
|
void free(void *ap) {
|
|
756: 89 e5 mov %esp,%ebp
|
|
758: 57 push %edi
|
|
759: 56 push %esi
|
|
75a: 53 push %ebx
|
|
75b: 8b 5d 08 mov 0x8(%ebp),%ebx
|
|
bp = (Header*)ap - 1;
|
|
75e: 8d 4b f8 lea -0x8(%ebx),%ecx
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
761: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
768: 89 c2 mov %eax,%edx
|
|
76a: 8b 00 mov (%eax),%eax
|
|
76c: 39 ca cmp %ecx,%edx
|
|
76e: 73 30 jae 7a0 <free+0x50>
|
|
770: 39 c1 cmp %eax,%ecx
|
|
772: 72 04 jb 778 <free+0x28>
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
774: 39 c2 cmp %eax,%edx
|
|
776: 72 f0 jb 768 <free+0x18>
|
|
break;
|
|
}
|
|
}
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
778: 8b 73 fc mov -0x4(%ebx),%esi
|
|
77b: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
77e: 39 f8 cmp %edi,%eax
|
|
780: 74 30 je 7b2 <free+0x62>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
782: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
}
|
|
else {
|
|
bp->s.ptr = p->s.ptr;
|
|
}
|
|
if (p + p->s.size == bp) {
|
|
785: 8b 42 04 mov 0x4(%edx),%eax
|
|
788: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
78b: 39 f1 cmp %esi,%ecx
|
|
78d: 74 3a je 7c9 <free+0x79>
|
|
p->s.size += bp->s.size;
|
|
p->s.ptr = bp->s.ptr;
|
|
78f: 89 0a mov %ecx,(%edx)
|
|
}
|
|
else {
|
|
p->s.ptr = bp;
|
|
}
|
|
freep = p;
|
|
}
|
|
791: 5b pop %ebx
|
|
freep = p;
|
|
792: 89 15 20 0e 00 00 mov %edx,0xe20
|
|
}
|
|
798: 5e pop %esi
|
|
799: 5f pop %edi
|
|
79a: 5d pop %ebp
|
|
79b: c3 ret
|
|
79c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
7a0: 39 c2 cmp %eax,%edx
|
|
7a2: 72 c4 jb 768 <free+0x18>
|
|
7a4: 39 c1 cmp %eax,%ecx
|
|
7a6: 73 c0 jae 768 <free+0x18>
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
7a8: 8b 73 fc mov -0x4(%ebx),%esi
|
|
7ab: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
7ae: 39 f8 cmp %edi,%eax
|
|
7b0: 75 d0 jne 782 <free+0x32>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
7b2: 03 70 04 add 0x4(%eax),%esi
|
|
7b5: 89 73 fc mov %esi,-0x4(%ebx)
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
7b8: 8b 02 mov (%edx),%eax
|
|
7ba: 8b 00 mov (%eax),%eax
|
|
7bc: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
if (p + p->s.size == bp) {
|
|
7bf: 8b 42 04 mov 0x4(%edx),%eax
|
|
7c2: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
7c5: 39 f1 cmp %esi,%ecx
|
|
7c7: 75 c6 jne 78f <free+0x3f>
|
|
p->s.size += bp->s.size;
|
|
7c9: 03 43 fc add -0x4(%ebx),%eax
|
|
freep = p;
|
|
7cc: 89 15 20 0e 00 00 mov %edx,0xe20
|
|
p->s.size += bp->s.size;
|
|
7d2: 89 42 04 mov %eax,0x4(%edx)
|
|
p->s.ptr = bp->s.ptr;
|
|
7d5: 8b 4b f8 mov -0x8(%ebx),%ecx
|
|
7d8: 89 0a mov %ecx,(%edx)
|
|
}
|
|
7da: 5b pop %ebx
|
|
7db: 5e pop %esi
|
|
7dc: 5f pop %edi
|
|
7dd: 5d pop %ebp
|
|
7de: c3 ret
|
|
7df: 90 nop
|
|
|
|
000007e0 <malloc>:
|
|
hp->s.size = nu;
|
|
free((void*)(hp + 1));
|
|
return freep;
|
|
}
|
|
|
|
void* malloc(uint nbytes) {
|
|
7e0: 55 push %ebp
|
|
7e1: 89 e5 mov %esp,%ebp
|
|
7e3: 57 push %edi
|
|
7e4: 56 push %esi
|
|
7e5: 53 push %ebx
|
|
7e6: 83 ec 1c sub $0x1c,%esp
|
|
Header *p, *prevp;
|
|
uint nunits;
|
|
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
7e9: 8b 45 08 mov 0x8(%ebp),%eax
|
|
if ((prevp = freep) == 0) {
|
|
7ec: 8b 3d 20 0e 00 00 mov 0xe20,%edi
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
7f2: 8d 70 07 lea 0x7(%eax),%esi
|
|
7f5: c1 ee 03 shr $0x3,%esi
|
|
7f8: 83 c6 01 add $0x1,%esi
|
|
if ((prevp = freep) == 0) {
|
|
7fb: 85 ff test %edi,%edi
|
|
7fd: 0f 84 9d 00 00 00 je 8a0 <malloc+0xc0>
|
|
base.s.ptr = freep = prevp = &base;
|
|
base.s.size = 0;
|
|
}
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
803: 8b 17 mov (%edi),%edx
|
|
if (p->s.size >= nunits) {
|
|
805: 8b 4a 04 mov 0x4(%edx),%ecx
|
|
808: 39 f1 cmp %esi,%ecx
|
|
80a: 73 6a jae 876 <malloc+0x96>
|
|
80c: bb 00 10 00 00 mov $0x1000,%ebx
|
|
811: 39 de cmp %ebx,%esi
|
|
813: 0f 43 de cmovae %esi,%ebx
|
|
p = sbrk(nu * sizeof(Header));
|
|
816: 8d 04 dd 00 00 00 00 lea 0x0(,%ebx,8),%eax
|
|
81d: 89 45 e4 mov %eax,-0x1c(%ebp)
|
|
820: eb 17 jmp 839 <malloc+0x59>
|
|
822: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
828: 8b 02 mov (%edx),%eax
|
|
if (p->s.size >= nunits) {
|
|
82a: 8b 48 04 mov 0x4(%eax),%ecx
|
|
82d: 39 f1 cmp %esi,%ecx
|
|
82f: 73 4f jae 880 <malloc+0xa0>
|
|
p->s.size = nunits;
|
|
}
|
|
freep = prevp;
|
|
return (void*)(p + 1);
|
|
}
|
|
if (p == freep) {
|
|
831: 8b 3d 20 0e 00 00 mov 0xe20,%edi
|
|
837: 89 c2 mov %eax,%edx
|
|
839: 39 d7 cmp %edx,%edi
|
|
83b: 75 eb jne 828 <malloc+0x48>
|
|
p = sbrk(nu * sizeof(Header));
|
|
83d: 83 ec 0c sub $0xc,%esp
|
|
840: ff 75 e4 push -0x1c(%ebp)
|
|
843: e8 3b fc ff ff call 483 <sbrk>
|
|
if (p == (char*)-1) {
|
|
848: 83 c4 10 add $0x10,%esp
|
|
84b: 83 f8 ff cmp $0xffffffff,%eax
|
|
84e: 74 1c je 86c <malloc+0x8c>
|
|
hp->s.size = nu;
|
|
850: 89 58 04 mov %ebx,0x4(%eax)
|
|
free((void*)(hp + 1));
|
|
853: 83 ec 0c sub $0xc,%esp
|
|
856: 83 c0 08 add $0x8,%eax
|
|
859: 50 push %eax
|
|
85a: e8 f1 fe ff ff call 750 <free>
|
|
return freep;
|
|
85f: 8b 15 20 0e 00 00 mov 0xe20,%edx
|
|
if ((p = morecore(nunits)) == 0) {
|
|
865: 83 c4 10 add $0x10,%esp
|
|
868: 85 d2 test %edx,%edx
|
|
86a: 75 bc jne 828 <malloc+0x48>
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
86c: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return 0;
|
|
86f: 31 c0 xor %eax,%eax
|
|
}
|
|
871: 5b pop %ebx
|
|
872: 5e pop %esi
|
|
873: 5f pop %edi
|
|
874: 5d pop %ebp
|
|
875: c3 ret
|
|
if (p->s.size >= nunits) {
|
|
876: 89 d0 mov %edx,%eax
|
|
878: 89 fa mov %edi,%edx
|
|
87a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
if (p->s.size == nunits) {
|
|
880: 39 ce cmp %ecx,%esi
|
|
882: 74 4c je 8d0 <malloc+0xf0>
|
|
p->s.size -= nunits;
|
|
884: 29 f1 sub %esi,%ecx
|
|
886: 89 48 04 mov %ecx,0x4(%eax)
|
|
p += p->s.size;
|
|
889: 8d 04 c8 lea (%eax,%ecx,8),%eax
|
|
p->s.size = nunits;
|
|
88c: 89 70 04 mov %esi,0x4(%eax)
|
|
freep = prevp;
|
|
88f: 89 15 20 0e 00 00 mov %edx,0xe20
|
|
}
|
|
895: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return (void*)(p + 1);
|
|
898: 83 c0 08 add $0x8,%eax
|
|
}
|
|
89b: 5b pop %ebx
|
|
89c: 5e pop %esi
|
|
89d: 5f pop %edi
|
|
89e: 5d pop %ebp
|
|
89f: c3 ret
|
|
base.s.ptr = freep = prevp = &base;
|
|
8a0: c7 05 20 0e 00 00 24 movl $0xe24,0xe20
|
|
8a7: 0e 00 00
|
|
base.s.size = 0;
|
|
8aa: bf 24 0e 00 00 mov $0xe24,%edi
|
|
base.s.ptr = freep = prevp = &base;
|
|
8af: c7 05 24 0e 00 00 24 movl $0xe24,0xe24
|
|
8b6: 0e 00 00
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
8b9: 89 fa mov %edi,%edx
|
|
base.s.size = 0;
|
|
8bb: c7 05 28 0e 00 00 00 movl $0x0,0xe28
|
|
8c2: 00 00 00
|
|
if (p->s.size >= nunits) {
|
|
8c5: e9 42 ff ff ff jmp 80c <malloc+0x2c>
|
|
8ca: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
prevp->s.ptr = p->s.ptr;
|
|
8d0: 8b 08 mov (%eax),%ecx
|
|
8d2: 89 0a mov %ecx,(%edx)
|
|
8d4: eb b9 jmp 88f <malloc+0xaf>
|