1320 lines
46 KiB
NASM
1320 lines
46 KiB
NASM
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_wc: file format elf32-i386
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Disassembly of section .text:
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00000000 <main>:
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exit();
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}
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printf(1, "%d %d %d %s\n", l, w, c, name);
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}
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int main(int argc, char *argv[]) {
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0: 8d 4c 24 04 lea 0x4(%esp),%ecx
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4: 83 e4 f0 and $0xfffffff0,%esp
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7: ff 71 fc push -0x4(%ecx)
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a: 55 push %ebp
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b: 89 e5 mov %esp,%ebp
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d: 57 push %edi
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e: 56 push %esi
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f: be 01 00 00 00 mov $0x1,%esi
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14: 53 push %ebx
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15: 51 push %ecx
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16: 83 ec 18 sub $0x18,%esp
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19: 8b 01 mov (%ecx),%eax
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1b: 8b 59 04 mov 0x4(%ecx),%ebx
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1e: 89 45 e4 mov %eax,-0x1c(%ebp)
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21: 83 c3 04 add $0x4,%ebx
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int fd, i;
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if (argc <= 1) {
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24: 83 f8 01 cmp $0x1,%eax
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27: 7e 56 jle 7f <main+0x7f>
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29: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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wc(0, "");
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exit();
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}
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for (i = 1; i < argc; i++) {
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if ((fd = open(argv[i], 0)) < 0) {
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30: 83 ec 08 sub $0x8,%esp
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33: 6a 00 push $0x0
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35: ff 33 push (%ebx)
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37: e8 ff 03 00 00 call 43b <open>
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3c: 83 c4 10 add $0x10,%esp
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3f: 89 c7 mov %eax,%edi
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41: 85 c0 test %eax,%eax
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43: 78 26 js 6b <main+0x6b>
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printf(1, "wc: cannot open %s\n", argv[i]);
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exit();
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}
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wc(fd, argv[i]);
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45: 83 ec 08 sub $0x8,%esp
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48: ff 33 push (%ebx)
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for (i = 1; i < argc; i++) {
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4a: 83 c6 01 add $0x1,%esi
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4d: 83 c3 04 add $0x4,%ebx
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wc(fd, argv[i]);
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50: 50 push %eax
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51: e8 4a 00 00 00 call a0 <wc>
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close(fd);
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56: 89 3c 24 mov %edi,(%esp)
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59: e8 0d 04 00 00 call 46b <close>
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for (i = 1; i < argc; i++) {
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5e: 83 c4 10 add $0x10,%esp
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61: 39 75 e4 cmp %esi,-0x1c(%ebp)
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64: 75 ca jne 30 <main+0x30>
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}
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exit();
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66: e8 68 03 00 00 call 3d3 <exit>
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printf(1, "wc: cannot open %s\n", argv[i]);
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6b: 50 push %eax
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6c: ff 33 push (%ebx)
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6e: 68 9b 08 00 00 push $0x89b
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73: 6a 01 push $0x1
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75: e8 d6 04 00 00 call 550 <printf>
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exit();
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7a: e8 54 03 00 00 call 3d3 <exit>
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wc(0, "");
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7f: 52 push %edx
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80: 52 push %edx
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81: 68 8d 08 00 00 push $0x88d
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86: 6a 00 push $0x0
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88: e8 13 00 00 00 call a0 <wc>
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exit();
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8d: e8 41 03 00 00 call 3d3 <exit>
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92: 66 90 xchg %ax,%ax
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94: 66 90 xchg %ax,%ax
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96: 66 90 xchg %ax,%ax
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98: 66 90 xchg %ax,%ax
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9a: 66 90 xchg %ax,%ax
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9c: 66 90 xchg %ax,%ax
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9e: 66 90 xchg %ax,%ax
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000000a0 <wc>:
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void wc(int fd, char *name) {
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a0: 55 push %ebp
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a1: 89 e5 mov %esp,%ebp
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a3: 57 push %edi
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a4: 56 push %esi
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a5: 53 push %ebx
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l = w = c = 0;
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a6: 31 db xor %ebx,%ebx
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void wc(int fd, char *name) {
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a8: 83 ec 1c sub $0x1c,%esp
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inword = 0;
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ab: c7 45 e4 00 00 00 00 movl $0x0,-0x1c(%ebp)
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l = w = c = 0;
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b2: c7 45 dc 00 00 00 00 movl $0x0,-0x24(%ebp)
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b9: c7 45 e0 00 00 00 00 movl $0x0,-0x20(%ebp)
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while ((n = read(fd, buf, sizeof(buf))) > 0) {
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c0: 83 ec 04 sub $0x4,%esp
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c3: 68 00 02 00 00 push $0x200
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c8: 68 00 0c 00 00 push $0xc00
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cd: ff 75 08 push 0x8(%ebp)
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d0: e8 16 03 00 00 call 3eb <read>
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d5: 83 c4 10 add $0x10,%esp
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d8: 89 c6 mov %eax,%esi
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da: 85 c0 test %eax,%eax
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dc: 7e 62 jle 140 <wc+0xa0>
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for (i = 0; i < n; i++) {
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de: 31 ff xor %edi,%edi
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e0: eb 14 jmp f6 <wc+0x56>
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e2: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
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inword = 0;
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e8: c7 45 e4 00 00 00 00 movl $0x0,-0x1c(%ebp)
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for (i = 0; i < n; i++) {
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ef: 83 c7 01 add $0x1,%edi
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f2: 39 fe cmp %edi,%esi
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f4: 74 42 je 138 <wc+0x98>
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if (buf[i] == '\n') {
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f6: 0f be 87 00 0c 00 00 movsbl 0xc00(%edi),%eax
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l++;
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fd: 31 c9 xor %ecx,%ecx
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ff: 3c 0a cmp $0xa,%al
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101: 0f 94 c1 sete %cl
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if (strchr(" \r\t\n\v", buf[i])) {
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104: 83 ec 08 sub $0x8,%esp
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107: 50 push %eax
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l++;
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108: 01 cb add %ecx,%ebx
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if (strchr(" \r\t\n\v", buf[i])) {
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10a: 68 78 08 00 00 push $0x878
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10f: e8 4c 01 00 00 call 260 <strchr>
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114: 83 c4 10 add $0x10,%esp
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117: 85 c0 test %eax,%eax
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119: 75 cd jne e8 <wc+0x48>
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else if (!inword) {
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11b: 8b 55 e4 mov -0x1c(%ebp),%edx
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11e: 85 d2 test %edx,%edx
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120: 75 cd jne ef <wc+0x4f>
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for (i = 0; i < n; i++) {
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122: 83 c7 01 add $0x1,%edi
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w++;
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125: 83 45 e0 01 addl $0x1,-0x20(%ebp)
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inword = 1;
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129: c7 45 e4 01 00 00 00 movl $0x1,-0x1c(%ebp)
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for (i = 0; i < n; i++) {
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130: 39 fe cmp %edi,%esi
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132: 75 c2 jne f6 <wc+0x56>
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134: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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c++;
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138: 01 75 dc add %esi,-0x24(%ebp)
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13b: eb 83 jmp c0 <wc+0x20>
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13d: 8d 76 00 lea 0x0(%esi),%esi
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if (n < 0) {
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140: 75 24 jne 166 <wc+0xc6>
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printf(1, "%d %d %d %s\n", l, w, c, name);
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142: 83 ec 08 sub $0x8,%esp
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145: ff 75 0c push 0xc(%ebp)
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148: ff 75 dc push -0x24(%ebp)
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14b: ff 75 e0 push -0x20(%ebp)
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14e: 53 push %ebx
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14f: 68 8e 08 00 00 push $0x88e
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154: 6a 01 push $0x1
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156: e8 f5 03 00 00 call 550 <printf>
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}
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15b: 83 c4 20 add $0x20,%esp
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15e: 8d 65 f4 lea -0xc(%ebp),%esp
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161: 5b pop %ebx
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162: 5e pop %esi
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163: 5f pop %edi
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164: 5d pop %ebp
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165: c3 ret
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printf(1, "wc: read error\n");
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166: 50 push %eax
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167: 50 push %eax
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168: 68 7e 08 00 00 push $0x87e
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16d: 6a 01 push $0x1
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16f: e8 dc 03 00 00 call 550 <printf>
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exit();
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174: e8 5a 02 00 00 call 3d3 <exit>
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179: 66 90 xchg %ax,%ax
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17b: 66 90 xchg %ax,%ax
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17d: 66 90 xchg %ax,%ax
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17f: 90 nop
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00000180 <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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180: 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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181: 31 c0 xor %eax,%eax
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char*strcpy(char *s, const char *t) {
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183: 89 e5 mov %esp,%ebp
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185: 53 push %ebx
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186: 8b 4d 08 mov 0x8(%ebp),%ecx
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189: 8b 5d 0c mov 0xc(%ebp),%ebx
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18c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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while ((*s++ = *t++) != 0) {
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190: 0f b6 14 03 movzbl (%ebx,%eax,1),%edx
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194: 88 14 01 mov %dl,(%ecx,%eax,1)
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197: 83 c0 01 add $0x1,%eax
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19a: 84 d2 test %dl,%dl
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19c: 75 f2 jne 190 <strcpy+0x10>
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;
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}
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return os;
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}
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19e: 8b 5d fc mov -0x4(%ebp),%ebx
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1a1: 89 c8 mov %ecx,%eax
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1a3: c9 leave
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1a4: c3 ret
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1a5: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1ac: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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000001b0 <strcmp>:
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int strcmp(const char *p, const char *q) {
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1b0: 55 push %ebp
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1b1: 89 e5 mov %esp,%ebp
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1b3: 53 push %ebx
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1b4: 8b 55 08 mov 0x8(%ebp),%edx
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1b7: 8b 4d 0c mov 0xc(%ebp),%ecx
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while (*p && *p == *q) {
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1ba: 0f b6 02 movzbl (%edx),%eax
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1bd: 84 c0 test %al,%al
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1bf: 75 17 jne 1d8 <strcmp+0x28>
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1c1: eb 3a jmp 1fd <strcmp+0x4d>
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1c3: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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1c7: 90 nop
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1c8: 0f b6 42 01 movzbl 0x1(%edx),%eax
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p++, q++;
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1cc: 83 c2 01 add $0x1,%edx
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1cf: 8d 59 01 lea 0x1(%ecx),%ebx
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while (*p && *p == *q) {
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1d2: 84 c0 test %al,%al
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1d4: 74 1a je 1f0 <strcmp+0x40>
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p++, q++;
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1d6: 89 d9 mov %ebx,%ecx
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while (*p && *p == *q) {
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1d8: 0f b6 19 movzbl (%ecx),%ebx
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1db: 38 c3 cmp %al,%bl
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1dd: 74 e9 je 1c8 <strcmp+0x18>
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}
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return (uchar) * p - (uchar) * q;
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1df: 29 d8 sub %ebx,%eax
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}
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1e1: 8b 5d fc mov -0x4(%ebp),%ebx
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1e4: c9 leave
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1e5: c3 ret
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1e6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1ed: 8d 76 00 lea 0x0(%esi),%esi
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return (uchar) * p - (uchar) * q;
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1f0: 0f b6 59 01 movzbl 0x1(%ecx),%ebx
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1f4: 31 c0 xor %eax,%eax
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1f6: 29 d8 sub %ebx,%eax
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}
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1f8: 8b 5d fc mov -0x4(%ebp),%ebx
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1fb: c9 leave
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1fc: c3 ret
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return (uchar) * p - (uchar) * q;
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1fd: 0f b6 19 movzbl (%ecx),%ebx
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200: 31 c0 xor %eax,%eax
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202: eb db jmp 1df <strcmp+0x2f>
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204: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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20b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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20f: 90 nop
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00000210 <strlen>:
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uint strlen(const char *s) {
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210: 55 push %ebp
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211: 89 e5 mov %esp,%ebp
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213: 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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216: 80 3a 00 cmpb $0x0,(%edx)
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219: 74 15 je 230 <strlen+0x20>
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21b: 31 c0 xor %eax,%eax
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21d: 8d 76 00 lea 0x0(%esi),%esi
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220: 83 c0 01 add $0x1,%eax
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223: 80 3c 02 00 cmpb $0x0,(%edx,%eax,1)
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227: 89 c1 mov %eax,%ecx
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229: 75 f5 jne 220 <strlen+0x10>
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;
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}
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return n;
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}
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22b: 89 c8 mov %ecx,%eax
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22d: 5d pop %ebp
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22e: c3 ret
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22f: 90 nop
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for (n = 0; s[n]; n++) {
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230: 31 c9 xor %ecx,%ecx
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}
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232: 5d pop %ebp
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233: 89 c8 mov %ecx,%eax
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235: c3 ret
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236: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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23d: 8d 76 00 lea 0x0(%esi),%esi
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00000240 <memset>:
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void* memset(void *dst, int c, uint n) {
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240: 55 push %ebp
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241: 89 e5 mov %esp,%ebp
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243: 57 push %edi
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244: 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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247: 8b 4d 10 mov 0x10(%ebp),%ecx
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24a: 8b 45 0c mov 0xc(%ebp),%eax
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24d: 89 d7 mov %edx,%edi
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24f: fc cld
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250: 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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252: 8b 7d fc mov -0x4(%ebp),%edi
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255: 89 d0 mov %edx,%eax
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257: c9 leave
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258: c3 ret
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259: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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00000260 <strchr>:
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char* strchr(const char *s, char c) {
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260: 55 push %ebp
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261: 89 e5 mov %esp,%ebp
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263: 8b 45 08 mov 0x8(%ebp),%eax
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266: 0f b6 4d 0c movzbl 0xc(%ebp),%ecx
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for (; *s; s++) {
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26a: 0f b6 10 movzbl (%eax),%edx
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26d: 84 d2 test %dl,%dl
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26f: 75 12 jne 283 <strchr+0x23>
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271: eb 1d jmp 290 <strchr+0x30>
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273: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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277: 90 nop
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278: 0f b6 50 01 movzbl 0x1(%eax),%edx
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27c: 83 c0 01 add $0x1,%eax
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27f: 84 d2 test %dl,%dl
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281: 74 0d je 290 <strchr+0x30>
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if (*s == c) {
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283: 38 d1 cmp %dl,%cl
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285: 75 f1 jne 278 <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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287: 5d pop %ebp
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288: c3 ret
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289: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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return 0;
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290: 31 c0 xor %eax,%eax
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}
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292: 5d pop %ebp
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293: c3 ret
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294: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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29b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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29f: 90 nop
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000002a0 <gets>:
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char* gets(char *buf, int max) {
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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: 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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2a5: 8d 7d e7 lea -0x19(%ebp),%edi
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char* gets(char *buf, int max) {
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2a8: 53 push %ebx
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for (i = 0; i + 1 < max;) {
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2a9: 31 db xor %ebx,%ebx
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char* gets(char *buf, int max) {
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2ab: 83 ec 1c sub $0x1c,%esp
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for (i = 0; i + 1 < max;) {
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2ae: eb 27 jmp 2d7 <gets+0x37>
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cc = read(0, &c, 1);
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2b0: 83 ec 04 sub $0x4,%esp
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2b3: 6a 01 push $0x1
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2b5: 57 push %edi
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2b6: 6a 00 push $0x0
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2b8: e8 2e 01 00 00 call 3eb <read>
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if (cc < 1) {
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2bd: 83 c4 10 add $0x10,%esp
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2c0: 85 c0 test %eax,%eax
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2c2: 7e 1d jle 2e1 <gets+0x41>
|
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break;
|
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}
|
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buf[i++] = c;
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2c4: 0f b6 45 e7 movzbl -0x19(%ebp),%eax
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2c8: 8b 55 08 mov 0x8(%ebp),%edx
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2cb: 88 44 1a ff mov %al,-0x1(%edx,%ebx,1)
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if (c == '\n' || c == '\r') {
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2cf: 3c 0a cmp $0xa,%al
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2d1: 74 1d je 2f0 <gets+0x50>
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2d3: 3c 0d cmp $0xd,%al
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2d5: 74 19 je 2f0 <gets+0x50>
|
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for (i = 0; i + 1 < max;) {
|
|
2d7: 89 de mov %ebx,%esi
|
|
2d9: 83 c3 01 add $0x1,%ebx
|
|
2dc: 3b 5d 0c cmp 0xc(%ebp),%ebx
|
|
2df: 7c cf jl 2b0 <gets+0x10>
|
|
break;
|
|
}
|
|
}
|
|
buf[i] = '\0';
|
|
2e1: 8b 45 08 mov 0x8(%ebp),%eax
|
|
2e4: c6 04 30 00 movb $0x0,(%eax,%esi,1)
|
|
return buf;
|
|
}
|
|
2e8: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
2eb: 5b pop %ebx
|
|
2ec: 5e pop %esi
|
|
2ed: 5f pop %edi
|
|
2ee: 5d pop %ebp
|
|
2ef: c3 ret
|
|
buf[i] = '\0';
|
|
2f0: 8b 45 08 mov 0x8(%ebp),%eax
|
|
2f3: 89 de mov %ebx,%esi
|
|
2f5: c6 04 30 00 movb $0x0,(%eax,%esi,1)
|
|
}
|
|
2f9: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
2fc: 5b pop %ebx
|
|
2fd: 5e pop %esi
|
|
2fe: 5f pop %edi
|
|
2ff: 5d pop %ebp
|
|
300: c3 ret
|
|
301: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
308: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
30f: 90 nop
|
|
|
|
00000310 <stat>:
|
|
|
|
int stat(const char *n, struct stat *st) {
|
|
310: 55 push %ebp
|
|
311: 89 e5 mov %esp,%ebp
|
|
313: 56 push %esi
|
|
314: 53 push %ebx
|
|
int fd;
|
|
int r;
|
|
|
|
fd = open(n, O_RDONLY);
|
|
315: 83 ec 08 sub $0x8,%esp
|
|
318: 6a 00 push $0x0
|
|
31a: ff 75 08 push 0x8(%ebp)
|
|
31d: e8 19 01 00 00 call 43b <open>
|
|
if (fd < 0) {
|
|
322: 83 c4 10 add $0x10,%esp
|
|
325: 85 c0 test %eax,%eax
|
|
327: 78 27 js 350 <stat+0x40>
|
|
return -1;
|
|
}
|
|
r = fstat(fd, st);
|
|
329: 83 ec 08 sub $0x8,%esp
|
|
32c: ff 75 0c push 0xc(%ebp)
|
|
32f: 89 c3 mov %eax,%ebx
|
|
331: 50 push %eax
|
|
332: e8 cc 00 00 00 call 403 <fstat>
|
|
close(fd);
|
|
337: 89 1c 24 mov %ebx,(%esp)
|
|
r = fstat(fd, st);
|
|
33a: 89 c6 mov %eax,%esi
|
|
close(fd);
|
|
33c: e8 2a 01 00 00 call 46b <close>
|
|
return r;
|
|
341: 83 c4 10 add $0x10,%esp
|
|
}
|
|
344: 8d 65 f8 lea -0x8(%ebp),%esp
|
|
347: 89 f0 mov %esi,%eax
|
|
349: 5b pop %ebx
|
|
34a: 5e pop %esi
|
|
34b: 5d pop %ebp
|
|
34c: c3 ret
|
|
34d: 8d 76 00 lea 0x0(%esi),%esi
|
|
return -1;
|
|
350: be ff ff ff ff mov $0xffffffff,%esi
|
|
355: eb ed jmp 344 <stat+0x34>
|
|
357: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
35e: 66 90 xchg %ax,%ax
|
|
|
|
00000360 <atoi>:
|
|
|
|
int atoi(const char *s) {
|
|
360: 55 push %ebp
|
|
361: 89 e5 mov %esp,%ebp
|
|
363: 53 push %ebx
|
|
364: 8b 55 08 mov 0x8(%ebp),%edx
|
|
int n;
|
|
|
|
n = 0;
|
|
while ('0' <= *s && *s <= '9') {
|
|
367: 0f be 02 movsbl (%edx),%eax
|
|
36a: 8d 48 d0 lea -0x30(%eax),%ecx
|
|
36d: 80 f9 09 cmp $0x9,%cl
|
|
n = 0;
|
|
370: b9 00 00 00 00 mov $0x0,%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
375: 77 1e ja 395 <atoi+0x35>
|
|
377: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
37e: 66 90 xchg %ax,%ax
|
|
n = n * 10 + *s++ - '0';
|
|
380: 83 c2 01 add $0x1,%edx
|
|
383: 8d 0c 89 lea (%ecx,%ecx,4),%ecx
|
|
386: 8d 4c 48 d0 lea -0x30(%eax,%ecx,2),%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
38a: 0f be 02 movsbl (%edx),%eax
|
|
38d: 8d 58 d0 lea -0x30(%eax),%ebx
|
|
390: 80 fb 09 cmp $0x9,%bl
|
|
393: 76 eb jbe 380 <atoi+0x20>
|
|
}
|
|
return n;
|
|
}
|
|
395: 8b 5d fc mov -0x4(%ebp),%ebx
|
|
398: 89 c8 mov %ecx,%eax
|
|
39a: c9 leave
|
|
39b: c3 ret
|
|
39c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
|
|
000003a0 <memmove>:
|
|
|
|
void* memmove(void *vdst, const void *vsrc, int n) {
|
|
3a0: 55 push %ebp
|
|
3a1: 89 e5 mov %esp,%ebp
|
|
3a3: 57 push %edi
|
|
3a4: 8b 45 10 mov 0x10(%ebp),%eax
|
|
3a7: 8b 55 08 mov 0x8(%ebp),%edx
|
|
3aa: 56 push %esi
|
|
3ab: 8b 75 0c mov 0xc(%ebp),%esi
|
|
char *dst;
|
|
const char *src;
|
|
|
|
dst = vdst;
|
|
src = vsrc;
|
|
while (n-- > 0) {
|
|
3ae: 85 c0 test %eax,%eax
|
|
3b0: 7e 13 jle 3c5 <memmove+0x25>
|
|
3b2: 01 d0 add %edx,%eax
|
|
dst = vdst;
|
|
3b4: 89 d7 mov %edx,%edi
|
|
3b6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
3bd: 8d 76 00 lea 0x0(%esi),%esi
|
|
*dst++ = *src++;
|
|
3c0: a4 movsb %ds:(%esi),%es:(%edi)
|
|
while (n-- > 0) {
|
|
3c1: 39 f8 cmp %edi,%eax
|
|
3c3: 75 fb jne 3c0 <memmove+0x20>
|
|
}
|
|
return vdst;
|
|
}
|
|
3c5: 5e pop %esi
|
|
3c6: 89 d0 mov %edx,%eax
|
|
3c8: 5f pop %edi
|
|
3c9: 5d pop %ebp
|
|
3ca: c3 ret
|
|
|
|
000003cb <fork>:
|
|
name: \
|
|
movl $SYS_ ## name, %eax; \
|
|
int $T_SYSCALL; \
|
|
ret
|
|
|
|
SYSCALL(fork)
|
|
3cb: b8 01 00 00 00 mov $0x1,%eax
|
|
3d0: cd 40 int $0x40
|
|
3d2: c3 ret
|
|
|
|
000003d3 <exit>:
|
|
SYSCALL(exit)
|
|
3d3: b8 02 00 00 00 mov $0x2,%eax
|
|
3d8: cd 40 int $0x40
|
|
3da: c3 ret
|
|
|
|
000003db <wait>:
|
|
SYSCALL(wait)
|
|
3db: b8 03 00 00 00 mov $0x3,%eax
|
|
3e0: cd 40 int $0x40
|
|
3e2: c3 ret
|
|
|
|
000003e3 <pipe>:
|
|
SYSCALL(pipe)
|
|
3e3: b8 04 00 00 00 mov $0x4,%eax
|
|
3e8: cd 40 int $0x40
|
|
3ea: c3 ret
|
|
|
|
000003eb <read>:
|
|
SYSCALL(read)
|
|
3eb: b8 05 00 00 00 mov $0x5,%eax
|
|
3f0: cd 40 int $0x40
|
|
3f2: c3 ret
|
|
|
|
000003f3 <kill>:
|
|
SYSCALL(kill)
|
|
3f3: b8 06 00 00 00 mov $0x6,%eax
|
|
3f8: cd 40 int $0x40
|
|
3fa: c3 ret
|
|
|
|
000003fb <exec>:
|
|
SYSCALL(exec)
|
|
3fb: b8 07 00 00 00 mov $0x7,%eax
|
|
400: cd 40 int $0x40
|
|
402: c3 ret
|
|
|
|
00000403 <fstat>:
|
|
SYSCALL(fstat)
|
|
403: b8 08 00 00 00 mov $0x8,%eax
|
|
408: cd 40 int $0x40
|
|
40a: c3 ret
|
|
|
|
0000040b <chdir>:
|
|
SYSCALL(chdir)
|
|
40b: b8 09 00 00 00 mov $0x9,%eax
|
|
410: cd 40 int $0x40
|
|
412: c3 ret
|
|
|
|
00000413 <dup>:
|
|
SYSCALL(dup)
|
|
413: b8 0a 00 00 00 mov $0xa,%eax
|
|
418: cd 40 int $0x40
|
|
41a: c3 ret
|
|
|
|
0000041b <getpid>:
|
|
SYSCALL(getpid)
|
|
41b: b8 0b 00 00 00 mov $0xb,%eax
|
|
420: cd 40 int $0x40
|
|
422: c3 ret
|
|
|
|
00000423 <sbrk>:
|
|
SYSCALL(sbrk)
|
|
423: b8 0c 00 00 00 mov $0xc,%eax
|
|
428: cd 40 int $0x40
|
|
42a: c3 ret
|
|
|
|
0000042b <sleep>:
|
|
SYSCALL(sleep)
|
|
42b: b8 0d 00 00 00 mov $0xd,%eax
|
|
430: cd 40 int $0x40
|
|
432: c3 ret
|
|
|
|
00000433 <uptime>:
|
|
SYSCALL(uptime)
|
|
433: b8 0e 00 00 00 mov $0xe,%eax
|
|
438: cd 40 int $0x40
|
|
43a: c3 ret
|
|
|
|
0000043b <open>:
|
|
SYSCALL(open)
|
|
43b: b8 0f 00 00 00 mov $0xf,%eax
|
|
440: cd 40 int $0x40
|
|
442: c3 ret
|
|
|
|
00000443 <write>:
|
|
SYSCALL(write)
|
|
443: b8 10 00 00 00 mov $0x10,%eax
|
|
448: cd 40 int $0x40
|
|
44a: c3 ret
|
|
|
|
0000044b <mknod>:
|
|
SYSCALL(mknod)
|
|
44b: b8 11 00 00 00 mov $0x11,%eax
|
|
450: cd 40 int $0x40
|
|
452: c3 ret
|
|
|
|
00000453 <unlink>:
|
|
SYSCALL(unlink)
|
|
453: b8 12 00 00 00 mov $0x12,%eax
|
|
458: cd 40 int $0x40
|
|
45a: c3 ret
|
|
|
|
0000045b <link>:
|
|
SYSCALL(link)
|
|
45b: b8 13 00 00 00 mov $0x13,%eax
|
|
460: cd 40 int $0x40
|
|
462: c3 ret
|
|
|
|
00000463 <mkdir>:
|
|
SYSCALL(mkdir)
|
|
463: b8 14 00 00 00 mov $0x14,%eax
|
|
468: cd 40 int $0x40
|
|
46a: c3 ret
|
|
|
|
0000046b <close>:
|
|
SYSCALL(close)
|
|
46b: b8 15 00 00 00 mov $0x15,%eax
|
|
470: cd 40 int $0x40
|
|
472: c3 ret
|
|
|
|
00000473 <getch>:
|
|
SYSCALL(getch)
|
|
473: b8 16 00 00 00 mov $0x16,%eax
|
|
478: cd 40 int $0x40
|
|
47a: c3 ret
|
|
|
|
0000047b <greeting>:
|
|
SYSCALL(greeting)
|
|
47b: b8 17 00 00 00 mov $0x17,%eax
|
|
480: cd 40 int $0x40
|
|
482: c3 ret
|
|
|
|
00000483 <shutdown>:
|
|
SYSCALL(shutdown)
|
|
483: b8 18 00 00 00 mov $0x18,%eax
|
|
488: cd 40 int $0x40
|
|
48a: c3 ret
|
|
|
|
0000048b <screen>:
|
|
SYSCALL(screen)
|
|
48b: b8 19 00 00 00 mov $0x19,%eax
|
|
490: cd 40 int $0x40
|
|
492: c3 ret
|
|
|
|
00000493 <cls>:
|
|
SYSCALL(cls)
|
|
493: b8 1a 00 00 00 mov $0x1a,%eax
|
|
498: cd 40 int $0x40
|
|
49a: c3 ret
|
|
49b: 66 90 xchg %ax,%ax
|
|
49d: 66 90 xchg %ax,%ax
|
|
49f: 90 nop
|
|
|
|
000004a0 <printint>:
|
|
|
|
static void putc(int fd, char c) {
|
|
write(fd, &c, 1);
|
|
}
|
|
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
4a0: 55 push %ebp
|
|
4a1: 89 e5 mov %esp,%ebp
|
|
4a3: 57 push %edi
|
|
4a4: 56 push %esi
|
|
4a5: 53 push %ebx
|
|
4a6: 83 ec 3c sub $0x3c,%esp
|
|
4a9: 89 4d c4 mov %ecx,-0x3c(%ebp)
|
|
uint x;
|
|
|
|
neg = 0;
|
|
if (sgn && xx < 0) {
|
|
neg = 1;
|
|
x = -xx;
|
|
4ac: 89 d1 mov %edx,%ecx
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
4ae: 89 45 b8 mov %eax,-0x48(%ebp)
|
|
if (sgn && xx < 0) {
|
|
4b1: 85 d2 test %edx,%edx
|
|
4b3: 0f 89 7f 00 00 00 jns 538 <printint+0x98>
|
|
4b9: f6 45 08 01 testb $0x1,0x8(%ebp)
|
|
4bd: 74 79 je 538 <printint+0x98>
|
|
neg = 1;
|
|
4bf: c7 45 bc 01 00 00 00 movl $0x1,-0x44(%ebp)
|
|
x = -xx;
|
|
4c6: f7 d9 neg %ecx
|
|
}
|
|
else {
|
|
x = xx;
|
|
}
|
|
|
|
i = 0;
|
|
4c8: 31 db xor %ebx,%ebx
|
|
4ca: 8d 75 d7 lea -0x29(%ebp),%esi
|
|
4cd: 8d 76 00 lea 0x0(%esi),%esi
|
|
do {
|
|
buf[i++] = digits[x % base];
|
|
4d0: 89 c8 mov %ecx,%eax
|
|
4d2: 31 d2 xor %edx,%edx
|
|
4d4: 89 cf mov %ecx,%edi
|
|
4d6: f7 75 c4 divl -0x3c(%ebp)
|
|
4d9: 0f b6 92 10 09 00 00 movzbl 0x910(%edx),%edx
|
|
4e0: 89 45 c0 mov %eax,-0x40(%ebp)
|
|
4e3: 89 d8 mov %ebx,%eax
|
|
4e5: 8d 5b 01 lea 0x1(%ebx),%ebx
|
|
}
|
|
while ((x /= base) != 0);
|
|
4e8: 8b 4d c0 mov -0x40(%ebp),%ecx
|
|
buf[i++] = digits[x % base];
|
|
4eb: 88 14 1e mov %dl,(%esi,%ebx,1)
|
|
while ((x /= base) != 0);
|
|
4ee: 39 7d c4 cmp %edi,-0x3c(%ebp)
|
|
4f1: 76 dd jbe 4d0 <printint+0x30>
|
|
if (neg) {
|
|
4f3: 8b 4d bc mov -0x44(%ebp),%ecx
|
|
4f6: 85 c9 test %ecx,%ecx
|
|
4f8: 74 0c je 506 <printint+0x66>
|
|
buf[i++] = '-';
|
|
4fa: c6 44 1d d8 2d movb $0x2d,-0x28(%ebp,%ebx,1)
|
|
buf[i++] = digits[x % base];
|
|
4ff: 89 d8 mov %ebx,%eax
|
|
buf[i++] = '-';
|
|
501: ba 2d 00 00 00 mov $0x2d,%edx
|
|
}
|
|
|
|
while (--i >= 0) {
|
|
506: 8b 7d b8 mov -0x48(%ebp),%edi
|
|
509: 8d 5c 05 d7 lea -0x29(%ebp,%eax,1),%ebx
|
|
50d: eb 07 jmp 516 <printint+0x76>
|
|
50f: 90 nop
|
|
putc(fd, buf[i]);
|
|
510: 0f b6 13 movzbl (%ebx),%edx
|
|
513: 83 eb 01 sub $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
516: 83 ec 04 sub $0x4,%esp
|
|
519: 88 55 d7 mov %dl,-0x29(%ebp)
|
|
51c: 6a 01 push $0x1
|
|
51e: 56 push %esi
|
|
51f: 57 push %edi
|
|
520: e8 1e ff ff ff call 443 <write>
|
|
while (--i >= 0) {
|
|
525: 83 c4 10 add $0x10,%esp
|
|
528: 39 de cmp %ebx,%esi
|
|
52a: 75 e4 jne 510 <printint+0x70>
|
|
}
|
|
}
|
|
52c: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
52f: 5b pop %ebx
|
|
530: 5e pop %esi
|
|
531: 5f pop %edi
|
|
532: 5d pop %ebp
|
|
533: c3 ret
|
|
534: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
neg = 0;
|
|
538: c7 45 bc 00 00 00 00 movl $0x0,-0x44(%ebp)
|
|
53f: eb 87 jmp 4c8 <printint+0x28>
|
|
541: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
548: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
54f: 90 nop
|
|
|
|
00000550 <printf>:
|
|
|
|
// Print to the given fd. Only understands %d, %x, %p, %s.
|
|
void printf(int fd, const char *fmt, ...) {
|
|
550: 55 push %ebp
|
|
551: 89 e5 mov %esp,%ebp
|
|
553: 57 push %edi
|
|
554: 56 push %esi
|
|
555: 53 push %ebx
|
|
556: 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++) {
|
|
559: 8b 5d 0c mov 0xc(%ebp),%ebx
|
|
void printf(int fd, const char *fmt, ...) {
|
|
55c: 8b 75 08 mov 0x8(%ebp),%esi
|
|
for (i = 0; fmt[i]; i++) {
|
|
55f: 0f b6 13 movzbl (%ebx),%edx
|
|
562: 84 d2 test %dl,%dl
|
|
564: 74 6a je 5d0 <printf+0x80>
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
566: 8d 45 10 lea 0x10(%ebp),%eax
|
|
569: 83 c3 01 add $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
56c: 8d 7d e7 lea -0x19(%ebp),%edi
|
|
state = 0;
|
|
56f: 31 c9 xor %ecx,%ecx
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
571: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
574: eb 36 jmp 5ac <printf+0x5c>
|
|
576: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
57d: 8d 76 00 lea 0x0(%esi),%esi
|
|
580: 89 4d d4 mov %ecx,-0x2c(%ebp)
|
|
c = fmt[i] & 0xff;
|
|
if (state == 0) {
|
|
if (c == '%') {
|
|
state = '%';
|
|
583: b9 25 00 00 00 mov $0x25,%ecx
|
|
if (c == '%') {
|
|
588: 83 f8 25 cmp $0x25,%eax
|
|
58b: 74 15 je 5a2 <printf+0x52>
|
|
write(fd, &c, 1);
|
|
58d: 83 ec 04 sub $0x4,%esp
|
|
590: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
593: 6a 01 push $0x1
|
|
595: 57 push %edi
|
|
596: 56 push %esi
|
|
597: e8 a7 fe ff ff call 443 <write>
|
|
59c: 8b 4d d4 mov -0x2c(%ebp),%ecx
|
|
}
|
|
else {
|
|
putc(fd, c);
|
|
59f: 83 c4 10 add $0x10,%esp
|
|
for (i = 0; fmt[i]; i++) {
|
|
5a2: 0f b6 13 movzbl (%ebx),%edx
|
|
5a5: 83 c3 01 add $0x1,%ebx
|
|
5a8: 84 d2 test %dl,%dl
|
|
5aa: 74 24 je 5d0 <printf+0x80>
|
|
c = fmt[i] & 0xff;
|
|
5ac: 0f b6 c2 movzbl %dl,%eax
|
|
if (state == 0) {
|
|
5af: 85 c9 test %ecx,%ecx
|
|
5b1: 74 cd je 580 <printf+0x30>
|
|
}
|
|
}
|
|
else if (state == '%') {
|
|
5b3: 83 f9 25 cmp $0x25,%ecx
|
|
5b6: 75 ea jne 5a2 <printf+0x52>
|
|
if (c == 'd') {
|
|
5b8: 83 f8 25 cmp $0x25,%eax
|
|
5bb: 0f 84 07 01 00 00 je 6c8 <printf+0x178>
|
|
5c1: 83 e8 63 sub $0x63,%eax
|
|
5c4: 83 f8 15 cmp $0x15,%eax
|
|
5c7: 77 17 ja 5e0 <printf+0x90>
|
|
5c9: ff 24 85 b8 08 00 00 jmp *0x8b8(,%eax,4)
|
|
putc(fd, c);
|
|
}
|
|
state = 0;
|
|
}
|
|
}
|
|
}
|
|
5d0: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
5d3: 5b pop %ebx
|
|
5d4: 5e pop %esi
|
|
5d5: 5f pop %edi
|
|
5d6: 5d pop %ebp
|
|
5d7: c3 ret
|
|
5d8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
5df: 90 nop
|
|
write(fd, &c, 1);
|
|
5e0: 83 ec 04 sub $0x4,%esp
|
|
5e3: 88 55 d4 mov %dl,-0x2c(%ebp)
|
|
5e6: 6a 01 push $0x1
|
|
5e8: 57 push %edi
|
|
5e9: 56 push %esi
|
|
5ea: c6 45 e7 25 movb $0x25,-0x19(%ebp)
|
|
5ee: e8 50 fe ff ff call 443 <write>
|
|
putc(fd, c);
|
|
5f3: 0f b6 55 d4 movzbl -0x2c(%ebp),%edx
|
|
write(fd, &c, 1);
|
|
5f7: 83 c4 0c add $0xc,%esp
|
|
5fa: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
5fd: 6a 01 push $0x1
|
|
5ff: 57 push %edi
|
|
600: 56 push %esi
|
|
601: e8 3d fe ff ff call 443 <write>
|
|
putc(fd, c);
|
|
606: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
609: 31 c9 xor %ecx,%ecx
|
|
60b: eb 95 jmp 5a2 <printf+0x52>
|
|
60d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 16, 0);
|
|
610: 83 ec 0c sub $0xc,%esp
|
|
613: b9 10 00 00 00 mov $0x10,%ecx
|
|
618: 6a 00 push $0x0
|
|
61a: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
61d: 8b 10 mov (%eax),%edx
|
|
61f: 89 f0 mov %esi,%eax
|
|
621: e8 7a fe ff ff call 4a0 <printint>
|
|
ap++;
|
|
626: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
62a: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
62d: 31 c9 xor %ecx,%ecx
|
|
62f: e9 6e ff ff ff jmp 5a2 <printf+0x52>
|
|
634: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
s = (char*)*ap;
|
|
638: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
63b: 8b 10 mov (%eax),%edx
|
|
ap++;
|
|
63d: 83 c0 04 add $0x4,%eax
|
|
640: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
if (s == 0) {
|
|
643: 85 d2 test %edx,%edx
|
|
645: 0f 84 8d 00 00 00 je 6d8 <printf+0x188>
|
|
while (*s != 0) {
|
|
64b: 0f b6 02 movzbl (%edx),%eax
|
|
state = 0;
|
|
64e: 31 c9 xor %ecx,%ecx
|
|
while (*s != 0) {
|
|
650: 84 c0 test %al,%al
|
|
652: 0f 84 4a ff ff ff je 5a2 <printf+0x52>
|
|
658: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
65b: 89 d3 mov %edx,%ebx
|
|
65d: 8d 76 00 lea 0x0(%esi),%esi
|
|
write(fd, &c, 1);
|
|
660: 83 ec 04 sub $0x4,%esp
|
|
s++;
|
|
663: 83 c3 01 add $0x1,%ebx
|
|
666: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
669: 6a 01 push $0x1
|
|
66b: 57 push %edi
|
|
66c: 56 push %esi
|
|
66d: e8 d1 fd ff ff call 443 <write>
|
|
while (*s != 0) {
|
|
672: 0f b6 03 movzbl (%ebx),%eax
|
|
675: 83 c4 10 add $0x10,%esp
|
|
678: 84 c0 test %al,%al
|
|
67a: 75 e4 jne 660 <printf+0x110>
|
|
state = 0;
|
|
67c: 8b 5d d4 mov -0x2c(%ebp),%ebx
|
|
67f: 31 c9 xor %ecx,%ecx
|
|
681: e9 1c ff ff ff jmp 5a2 <printf+0x52>
|
|
686: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
68d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 10, 1);
|
|
690: 83 ec 0c sub $0xc,%esp
|
|
693: b9 0a 00 00 00 mov $0xa,%ecx
|
|
698: 6a 01 push $0x1
|
|
69a: e9 7b ff ff ff jmp 61a <printf+0xca>
|
|
69f: 90 nop
|
|
putc(fd, *ap);
|
|
6a0: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
write(fd, &c, 1);
|
|
6a3: 83 ec 04 sub $0x4,%esp
|
|
putc(fd, *ap);
|
|
6a6: 8b 00 mov (%eax),%eax
|
|
write(fd, &c, 1);
|
|
6a8: 6a 01 push $0x1
|
|
6aa: 57 push %edi
|
|
6ab: 56 push %esi
|
|
putc(fd, *ap);
|
|
6ac: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
6af: e8 8f fd ff ff call 443 <write>
|
|
ap++;
|
|
6b4: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
6b8: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
6bb: 31 c9 xor %ecx,%ecx
|
|
6bd: e9 e0 fe ff ff jmp 5a2 <printf+0x52>
|
|
6c2: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
putc(fd, c);
|
|
6c8: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
6cb: 83 ec 04 sub $0x4,%esp
|
|
6ce: e9 2a ff ff ff jmp 5fd <printf+0xad>
|
|
6d3: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
6d7: 90 nop
|
|
s = "(null)";
|
|
6d8: ba af 08 00 00 mov $0x8af,%edx
|
|
while (*s != 0) {
|
|
6dd: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
6e0: b8 28 00 00 00 mov $0x28,%eax
|
|
6e5: 89 d3 mov %edx,%ebx
|
|
6e7: e9 74 ff ff ff jmp 660 <printf+0x110>
|
|
6ec: 66 90 xchg %ax,%ax
|
|
6ee: 66 90 xchg %ax,%ax
|
|
|
|
000006f0 <free>:
|
|
typedef union header Header;
|
|
|
|
static Header base;
|
|
static Header *freep;
|
|
|
|
void free(void *ap) {
|
|
6f0: 55 push %ebp
|
|
Header *bp, *p;
|
|
|
|
bp = (Header*)ap - 1;
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
6f1: a1 00 0e 00 00 mov 0xe00,%eax
|
|
void free(void *ap) {
|
|
6f6: 89 e5 mov %esp,%ebp
|
|
6f8: 57 push %edi
|
|
6f9: 56 push %esi
|
|
6fa: 53 push %ebx
|
|
6fb: 8b 5d 08 mov 0x8(%ebp),%ebx
|
|
bp = (Header*)ap - 1;
|
|
6fe: 8d 4b f8 lea -0x8(%ebx),%ecx
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
701: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
708: 89 c2 mov %eax,%edx
|
|
70a: 8b 00 mov (%eax),%eax
|
|
70c: 39 ca cmp %ecx,%edx
|
|
70e: 73 30 jae 740 <free+0x50>
|
|
710: 39 c1 cmp %eax,%ecx
|
|
712: 72 04 jb 718 <free+0x28>
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
714: 39 c2 cmp %eax,%edx
|
|
716: 72 f0 jb 708 <free+0x18>
|
|
break;
|
|
}
|
|
}
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
718: 8b 73 fc mov -0x4(%ebx),%esi
|
|
71b: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
71e: 39 f8 cmp %edi,%eax
|
|
720: 74 30 je 752 <free+0x62>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
722: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
}
|
|
else {
|
|
bp->s.ptr = p->s.ptr;
|
|
}
|
|
if (p + p->s.size == bp) {
|
|
725: 8b 42 04 mov 0x4(%edx),%eax
|
|
728: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
72b: 39 f1 cmp %esi,%ecx
|
|
72d: 74 3a je 769 <free+0x79>
|
|
p->s.size += bp->s.size;
|
|
p->s.ptr = bp->s.ptr;
|
|
72f: 89 0a mov %ecx,(%edx)
|
|
}
|
|
else {
|
|
p->s.ptr = bp;
|
|
}
|
|
freep = p;
|
|
}
|
|
731: 5b pop %ebx
|
|
freep = p;
|
|
732: 89 15 00 0e 00 00 mov %edx,0xe00
|
|
}
|
|
738: 5e pop %esi
|
|
739: 5f pop %edi
|
|
73a: 5d pop %ebp
|
|
73b: c3 ret
|
|
73c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
740: 39 c2 cmp %eax,%edx
|
|
742: 72 c4 jb 708 <free+0x18>
|
|
744: 39 c1 cmp %eax,%ecx
|
|
746: 73 c0 jae 708 <free+0x18>
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
748: 8b 73 fc mov -0x4(%ebx),%esi
|
|
74b: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
74e: 39 f8 cmp %edi,%eax
|
|
750: 75 d0 jne 722 <free+0x32>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
752: 03 70 04 add 0x4(%eax),%esi
|
|
755: 89 73 fc mov %esi,-0x4(%ebx)
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
758: 8b 02 mov (%edx),%eax
|
|
75a: 8b 00 mov (%eax),%eax
|
|
75c: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
if (p + p->s.size == bp) {
|
|
75f: 8b 42 04 mov 0x4(%edx),%eax
|
|
762: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
765: 39 f1 cmp %esi,%ecx
|
|
767: 75 c6 jne 72f <free+0x3f>
|
|
p->s.size += bp->s.size;
|
|
769: 03 43 fc add -0x4(%ebx),%eax
|
|
freep = p;
|
|
76c: 89 15 00 0e 00 00 mov %edx,0xe00
|
|
p->s.size += bp->s.size;
|
|
772: 89 42 04 mov %eax,0x4(%edx)
|
|
p->s.ptr = bp->s.ptr;
|
|
775: 8b 4b f8 mov -0x8(%ebx),%ecx
|
|
778: 89 0a mov %ecx,(%edx)
|
|
}
|
|
77a: 5b pop %ebx
|
|
77b: 5e pop %esi
|
|
77c: 5f pop %edi
|
|
77d: 5d pop %ebp
|
|
77e: c3 ret
|
|
77f: 90 nop
|
|
|
|
00000780 <malloc>:
|
|
hp->s.size = nu;
|
|
free((void*)(hp + 1));
|
|
return freep;
|
|
}
|
|
|
|
void* malloc(uint nbytes) {
|
|
780: 55 push %ebp
|
|
781: 89 e5 mov %esp,%ebp
|
|
783: 57 push %edi
|
|
784: 56 push %esi
|
|
785: 53 push %ebx
|
|
786: 83 ec 1c sub $0x1c,%esp
|
|
Header *p, *prevp;
|
|
uint nunits;
|
|
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
789: 8b 45 08 mov 0x8(%ebp),%eax
|
|
if ((prevp = freep) == 0) {
|
|
78c: 8b 3d 00 0e 00 00 mov 0xe00,%edi
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
792: 8d 70 07 lea 0x7(%eax),%esi
|
|
795: c1 ee 03 shr $0x3,%esi
|
|
798: 83 c6 01 add $0x1,%esi
|
|
if ((prevp = freep) == 0) {
|
|
79b: 85 ff test %edi,%edi
|
|
79d: 0f 84 9d 00 00 00 je 840 <malloc+0xc0>
|
|
base.s.ptr = freep = prevp = &base;
|
|
base.s.size = 0;
|
|
}
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
7a3: 8b 17 mov (%edi),%edx
|
|
if (p->s.size >= nunits) {
|
|
7a5: 8b 4a 04 mov 0x4(%edx),%ecx
|
|
7a8: 39 f1 cmp %esi,%ecx
|
|
7aa: 73 6a jae 816 <malloc+0x96>
|
|
7ac: bb 00 10 00 00 mov $0x1000,%ebx
|
|
7b1: 39 de cmp %ebx,%esi
|
|
7b3: 0f 43 de cmovae %esi,%ebx
|
|
p = sbrk(nu * sizeof(Header));
|
|
7b6: 8d 04 dd 00 00 00 00 lea 0x0(,%ebx,8),%eax
|
|
7bd: 89 45 e4 mov %eax,-0x1c(%ebp)
|
|
7c0: eb 17 jmp 7d9 <malloc+0x59>
|
|
7c2: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
7c8: 8b 02 mov (%edx),%eax
|
|
if (p->s.size >= nunits) {
|
|
7ca: 8b 48 04 mov 0x4(%eax),%ecx
|
|
7cd: 39 f1 cmp %esi,%ecx
|
|
7cf: 73 4f jae 820 <malloc+0xa0>
|
|
p->s.size = nunits;
|
|
}
|
|
freep = prevp;
|
|
return (void*)(p + 1);
|
|
}
|
|
if (p == freep) {
|
|
7d1: 8b 3d 00 0e 00 00 mov 0xe00,%edi
|
|
7d7: 89 c2 mov %eax,%edx
|
|
7d9: 39 d7 cmp %edx,%edi
|
|
7db: 75 eb jne 7c8 <malloc+0x48>
|
|
p = sbrk(nu * sizeof(Header));
|
|
7dd: 83 ec 0c sub $0xc,%esp
|
|
7e0: ff 75 e4 push -0x1c(%ebp)
|
|
7e3: e8 3b fc ff ff call 423 <sbrk>
|
|
if (p == (char*)-1) {
|
|
7e8: 83 c4 10 add $0x10,%esp
|
|
7eb: 83 f8 ff cmp $0xffffffff,%eax
|
|
7ee: 74 1c je 80c <malloc+0x8c>
|
|
hp->s.size = nu;
|
|
7f0: 89 58 04 mov %ebx,0x4(%eax)
|
|
free((void*)(hp + 1));
|
|
7f3: 83 ec 0c sub $0xc,%esp
|
|
7f6: 83 c0 08 add $0x8,%eax
|
|
7f9: 50 push %eax
|
|
7fa: e8 f1 fe ff ff call 6f0 <free>
|
|
return freep;
|
|
7ff: 8b 15 00 0e 00 00 mov 0xe00,%edx
|
|
if ((p = morecore(nunits)) == 0) {
|
|
805: 83 c4 10 add $0x10,%esp
|
|
808: 85 d2 test %edx,%edx
|
|
80a: 75 bc jne 7c8 <malloc+0x48>
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
80c: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return 0;
|
|
80f: 31 c0 xor %eax,%eax
|
|
}
|
|
811: 5b pop %ebx
|
|
812: 5e pop %esi
|
|
813: 5f pop %edi
|
|
814: 5d pop %ebp
|
|
815: c3 ret
|
|
if (p->s.size >= nunits) {
|
|
816: 89 d0 mov %edx,%eax
|
|
818: 89 fa mov %edi,%edx
|
|
81a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
if (p->s.size == nunits) {
|
|
820: 39 ce cmp %ecx,%esi
|
|
822: 74 4c je 870 <malloc+0xf0>
|
|
p->s.size -= nunits;
|
|
824: 29 f1 sub %esi,%ecx
|
|
826: 89 48 04 mov %ecx,0x4(%eax)
|
|
p += p->s.size;
|
|
829: 8d 04 c8 lea (%eax,%ecx,8),%eax
|
|
p->s.size = nunits;
|
|
82c: 89 70 04 mov %esi,0x4(%eax)
|
|
freep = prevp;
|
|
82f: 89 15 00 0e 00 00 mov %edx,0xe00
|
|
}
|
|
835: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return (void*)(p + 1);
|
|
838: 83 c0 08 add $0x8,%eax
|
|
}
|
|
83b: 5b pop %ebx
|
|
83c: 5e pop %esi
|
|
83d: 5f pop %edi
|
|
83e: 5d pop %ebp
|
|
83f: c3 ret
|
|
base.s.ptr = freep = prevp = &base;
|
|
840: c7 05 00 0e 00 00 04 movl $0xe04,0xe00
|
|
847: 0e 00 00
|
|
base.s.size = 0;
|
|
84a: bf 04 0e 00 00 mov $0xe04,%edi
|
|
base.s.ptr = freep = prevp = &base;
|
|
84f: c7 05 04 0e 00 00 04 movl $0xe04,0xe04
|
|
856: 0e 00 00
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
859: 89 fa mov %edi,%edx
|
|
base.s.size = 0;
|
|
85b: c7 05 08 0e 00 00 00 movl $0x0,0xe08
|
|
862: 00 00 00
|
|
if (p->s.size >= nunits) {
|
|
865: e9 42 ff ff ff jmp 7ac <malloc+0x2c>
|
|
86a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
prevp->s.ptr = p->s.ptr;
|
|
870: 8b 08 mov (%eax),%ecx
|
|
872: 89 0a mov %ecx,(%edx)
|
|
874: eb b9 jmp 82f <malloc+0xaf>
|