1277 lines
44 KiB
NASM
1277 lines
44 KiB
NASM
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_stressfs: file format elf32-i386
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Disassembly of section .text:
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00000000 <main>:
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#include "stat.h"
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#include "user.h"
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#include "fs.h"
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#include "fcntl.h"
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int main(int argc, char *argv[]) {
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0: 8d 4c 24 04 lea 0x4(%esp),%ecx
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4: 83 e4 f0 and $0xfffffff0,%esp
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int fd, i;
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char path[] = "stressfs0";
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7: b8 30 00 00 00 mov $0x30,%eax
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int main(int argc, char *argv[]) {
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c: ff 71 fc push -0x4(%ecx)
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f: 55 push %ebp
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10: 89 e5 mov %esp,%ebp
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12: 57 push %edi
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13: 56 push %esi
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char data[512];
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printf(1, "stressfs starting\n");
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memset(data, 'a', sizeof(data));
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14: 8d b5 e8 fd ff ff lea -0x218(%ebp),%esi
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int main(int argc, char *argv[]) {
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1a: 53 push %ebx
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for (i = 0; i < 4; i++) {
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1b: 31 db xor %ebx,%ebx
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int main(int argc, char *argv[]) {
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1d: 51 push %ecx
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1e: 81 ec 20 02 00 00 sub $0x220,%esp
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char path[] = "stressfs0";
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24: 66 89 85 e6 fd ff ff mov %ax,-0x21a(%ebp)
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printf(1, "stressfs starting\n");
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2b: 68 28 08 00 00 push $0x828
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30: 6a 01 push $0x1
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char path[] = "stressfs0";
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32: c7 85 de fd ff ff 73 movl $0x65727473,-0x222(%ebp)
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39: 74 72 65
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3c: c7 85 e2 fd ff ff 73 movl $0x73667373,-0x21e(%ebp)
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43: 73 66 73
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printf(1, "stressfs starting\n");
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46: e8 b5 04 00 00 call 500 <printf>
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memset(data, 'a', sizeof(data));
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4b: 83 c4 0c add $0xc,%esp
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4e: 68 00 02 00 00 push $0x200
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53: 6a 61 push $0x61
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55: 56 push %esi
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56: e8 a5 01 00 00 call 200 <memset>
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5b: 83 c4 10 add $0x10,%esp
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if (fork() > 0) {
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5e: e8 28 03 00 00 call 38b <fork>
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63: 85 c0 test %eax,%eax
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65: 0f 8f bf 00 00 00 jg 12a <main+0x12a>
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for (i = 0; i < 4; i++) {
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6b: 83 c3 01 add $0x1,%ebx
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6e: 83 fb 04 cmp $0x4,%ebx
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71: 75 eb jne 5e <main+0x5e>
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73: bf 04 00 00 00 mov $0x4,%edi
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break;
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}
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}
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printf(1, "write %d\n", i);
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78: 83 ec 04 sub $0x4,%esp
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7b: 53 push %ebx
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path[8] += i;
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fd = open(path, O_CREATE | O_RDWR);
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7c: bb 14 00 00 00 mov $0x14,%ebx
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printf(1, "write %d\n", i);
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81: 68 3b 08 00 00 push $0x83b
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86: 6a 01 push $0x1
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88: e8 73 04 00 00 call 500 <printf>
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path[8] += i;
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8d: 89 f8 mov %edi,%eax
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fd = open(path, O_CREATE | O_RDWR);
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8f: 5f pop %edi
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path[8] += i;
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90: 00 85 e6 fd ff ff add %al,-0x21a(%ebp)
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fd = open(path, O_CREATE | O_RDWR);
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96: 58 pop %eax
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97: 8d 85 de fd ff ff lea -0x222(%ebp),%eax
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9d: 68 02 02 00 00 push $0x202
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a2: 50 push %eax
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a3: e8 53 03 00 00 call 3fb <open>
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a8: 83 c4 10 add $0x10,%esp
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ab: 89 c7 mov %eax,%edi
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for (i = 0; i < 20; i++) {
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ad: 8d 76 00 lea 0x0(%esi),%esi
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// printf(fd, "%d\n", i);
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write(fd, data, sizeof(data));
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b0: 83 ec 04 sub $0x4,%esp
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b3: 68 00 02 00 00 push $0x200
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b8: 56 push %esi
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b9: 57 push %edi
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ba: e8 44 03 00 00 call 403 <write>
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for (i = 0; i < 20; i++) {
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bf: 83 c4 10 add $0x10,%esp
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c2: 83 eb 01 sub $0x1,%ebx
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c5: 75 e9 jne b0 <main+0xb0>
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}
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close(fd);
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c7: 83 ec 0c sub $0xc,%esp
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ca: 57 push %edi
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cb: e8 5b 03 00 00 call 42b <close>
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printf(1, "read\n");
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d0: 58 pop %eax
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d1: 5a pop %edx
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d2: 68 45 08 00 00 push $0x845
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d7: 6a 01 push $0x1
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d9: e8 22 04 00 00 call 500 <printf>
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fd = open(path, O_RDONLY);
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de: 8d 85 de fd ff ff lea -0x222(%ebp),%eax
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e4: 59 pop %ecx
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e5: 5b pop %ebx
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e6: 6a 00 push $0x0
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e8: bb 14 00 00 00 mov $0x14,%ebx
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ed: 50 push %eax
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ee: e8 08 03 00 00 call 3fb <open>
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f3: 83 c4 10 add $0x10,%esp
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f6: 89 c7 mov %eax,%edi
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for (i = 0; i < 20; i++) {
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f8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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ff: 90 nop
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read(fd, data, sizeof(data));
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100: 83 ec 04 sub $0x4,%esp
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103: 68 00 02 00 00 push $0x200
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108: 56 push %esi
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109: 57 push %edi
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10a: e8 9c 02 00 00 call 3ab <read>
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for (i = 0; i < 20; i++) {
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10f: 83 c4 10 add $0x10,%esp
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112: 83 eb 01 sub $0x1,%ebx
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115: 75 e9 jne 100 <main+0x100>
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}
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close(fd);
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117: 83 ec 0c sub $0xc,%esp
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11a: 57 push %edi
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11b: e8 0b 03 00 00 call 42b <close>
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wait();
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120: e8 76 02 00 00 call 39b <wait>
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exit();
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125: e8 69 02 00 00 call 393 <exit>
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path[8] += i;
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12a: 89 df mov %ebx,%edi
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12c: e9 47 ff ff ff jmp 78 <main+0x78>
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131: 66 90 xchg %ax,%ax
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133: 66 90 xchg %ax,%ax
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135: 66 90 xchg %ax,%ax
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137: 66 90 xchg %ax,%ax
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139: 66 90 xchg %ax,%ax
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13b: 66 90 xchg %ax,%ax
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13d: 66 90 xchg %ax,%ax
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13f: 90 nop
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00000140 <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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140: 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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141: 31 c0 xor %eax,%eax
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char*strcpy(char *s, const char *t) {
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143: 89 e5 mov %esp,%ebp
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145: 53 push %ebx
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146: 8b 4d 08 mov 0x8(%ebp),%ecx
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149: 8b 5d 0c mov 0xc(%ebp),%ebx
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14c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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while ((*s++ = *t++) != 0) {
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150: 0f b6 14 03 movzbl (%ebx,%eax,1),%edx
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154: 88 14 01 mov %dl,(%ecx,%eax,1)
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157: 83 c0 01 add $0x1,%eax
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15a: 84 d2 test %dl,%dl
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15c: 75 f2 jne 150 <strcpy+0x10>
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;
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}
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return os;
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}
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15e: 8b 5d fc mov -0x4(%ebp),%ebx
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161: 89 c8 mov %ecx,%eax
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163: c9 leave
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164: c3 ret
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165: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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16c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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00000170 <strcmp>:
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int strcmp(const char *p, const char *q) {
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170: 55 push %ebp
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171: 89 e5 mov %esp,%ebp
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173: 53 push %ebx
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174: 8b 55 08 mov 0x8(%ebp),%edx
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177: 8b 4d 0c mov 0xc(%ebp),%ecx
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while (*p && *p == *q) {
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17a: 0f b6 02 movzbl (%edx),%eax
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17d: 84 c0 test %al,%al
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17f: 75 17 jne 198 <strcmp+0x28>
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181: eb 3a jmp 1bd <strcmp+0x4d>
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183: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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187: 90 nop
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188: 0f b6 42 01 movzbl 0x1(%edx),%eax
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p++, q++;
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18c: 83 c2 01 add $0x1,%edx
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18f: 8d 59 01 lea 0x1(%ecx),%ebx
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while (*p && *p == *q) {
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192: 84 c0 test %al,%al
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194: 74 1a je 1b0 <strcmp+0x40>
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p++, q++;
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196: 89 d9 mov %ebx,%ecx
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while (*p && *p == *q) {
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198: 0f b6 19 movzbl (%ecx),%ebx
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19b: 38 c3 cmp %al,%bl
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19d: 74 e9 je 188 <strcmp+0x18>
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}
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return (uchar) * p - (uchar) * q;
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19f: 29 d8 sub %ebx,%eax
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}
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1a1: 8b 5d fc mov -0x4(%ebp),%ebx
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1a4: c9 leave
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1a5: c3 ret
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1a6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1ad: 8d 76 00 lea 0x0(%esi),%esi
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return (uchar) * p - (uchar) * q;
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1b0: 0f b6 59 01 movzbl 0x1(%ecx),%ebx
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1b4: 31 c0 xor %eax,%eax
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1b6: 29 d8 sub %ebx,%eax
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}
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1b8: 8b 5d fc mov -0x4(%ebp),%ebx
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1bb: c9 leave
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1bc: c3 ret
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return (uchar) * p - (uchar) * q;
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1bd: 0f b6 19 movzbl (%ecx),%ebx
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1c0: 31 c0 xor %eax,%eax
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1c2: eb db jmp 19f <strcmp+0x2f>
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1c4: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1cb: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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1cf: 90 nop
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000001d0 <strlen>:
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uint strlen(const char *s) {
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1d0: 55 push %ebp
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1d1: 89 e5 mov %esp,%ebp
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1d3: 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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1d6: 80 3a 00 cmpb $0x0,(%edx)
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1d9: 74 15 je 1f0 <strlen+0x20>
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1db: 31 c0 xor %eax,%eax
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1dd: 8d 76 00 lea 0x0(%esi),%esi
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1e0: 83 c0 01 add $0x1,%eax
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1e3: 80 3c 02 00 cmpb $0x0,(%edx,%eax,1)
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1e7: 89 c1 mov %eax,%ecx
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1e9: 75 f5 jne 1e0 <strlen+0x10>
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;
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}
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return n;
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}
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1eb: 89 c8 mov %ecx,%eax
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1ed: 5d pop %ebp
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1ee: c3 ret
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1ef: 90 nop
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for (n = 0; s[n]; n++) {
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1f0: 31 c9 xor %ecx,%ecx
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}
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1f2: 5d pop %ebp
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1f3: 89 c8 mov %ecx,%eax
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1f5: c3 ret
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1f6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1fd: 8d 76 00 lea 0x0(%esi),%esi
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00000200 <memset>:
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void* memset(void *dst, int c, uint n) {
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200: 55 push %ebp
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201: 89 e5 mov %esp,%ebp
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203: 57 push %edi
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204: 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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207: 8b 4d 10 mov 0x10(%ebp),%ecx
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20a: 8b 45 0c mov 0xc(%ebp),%eax
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20d: 89 d7 mov %edx,%edi
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20f: fc cld
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210: 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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212: 8b 7d fc mov -0x4(%ebp),%edi
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215: 89 d0 mov %edx,%eax
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217: c9 leave
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218: c3 ret
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219: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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00000220 <strchr>:
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char* strchr(const char *s, char c) {
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220: 55 push %ebp
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221: 89 e5 mov %esp,%ebp
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223: 8b 45 08 mov 0x8(%ebp),%eax
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226: 0f b6 4d 0c movzbl 0xc(%ebp),%ecx
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for (; *s; s++) {
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22a: 0f b6 10 movzbl (%eax),%edx
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22d: 84 d2 test %dl,%dl
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22f: 75 12 jne 243 <strchr+0x23>
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231: eb 1d jmp 250 <strchr+0x30>
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233: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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237: 90 nop
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238: 0f b6 50 01 movzbl 0x1(%eax),%edx
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23c: 83 c0 01 add $0x1,%eax
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23f: 84 d2 test %dl,%dl
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241: 74 0d je 250 <strchr+0x30>
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if (*s == c) {
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243: 38 d1 cmp %dl,%cl
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245: 75 f1 jne 238 <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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247: 5d pop %ebp
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248: c3 ret
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249: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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return 0;
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250: 31 c0 xor %eax,%eax
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}
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252: 5d pop %ebp
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253: c3 ret
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254: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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25b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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25f: 90 nop
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00000260 <gets>:
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char* gets(char *buf, int max) {
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260: 55 push %ebp
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261: 89 e5 mov %esp,%ebp
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263: 57 push %edi
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264: 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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265: 8d 7d e7 lea -0x19(%ebp),%edi
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char* gets(char *buf, int max) {
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268: 53 push %ebx
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for (i = 0; i + 1 < max;) {
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269: 31 db xor %ebx,%ebx
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char* gets(char *buf, int max) {
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26b: 83 ec 1c sub $0x1c,%esp
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for (i = 0; i + 1 < max;) {
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26e: eb 27 jmp 297 <gets+0x37>
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cc = read(0, &c, 1);
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270: 83 ec 04 sub $0x4,%esp
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273: 6a 01 push $0x1
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275: 57 push %edi
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276: 6a 00 push $0x0
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278: e8 2e 01 00 00 call 3ab <read>
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if (cc < 1) {
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27d: 83 c4 10 add $0x10,%esp
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280: 85 c0 test %eax,%eax
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282: 7e 1d jle 2a1 <gets+0x41>
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break;
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}
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buf[i++] = c;
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284: 0f b6 45 e7 movzbl -0x19(%ebp),%eax
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288: 8b 55 08 mov 0x8(%ebp),%edx
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28b: 88 44 1a ff mov %al,-0x1(%edx,%ebx,1)
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if (c == '\n' || c == '\r') {
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28f: 3c 0a cmp $0xa,%al
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291: 74 1d je 2b0 <gets+0x50>
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293: 3c 0d cmp $0xd,%al
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295: 74 19 je 2b0 <gets+0x50>
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for (i = 0; i + 1 < max;) {
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297: 89 de mov %ebx,%esi
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299: 83 c3 01 add $0x1,%ebx
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29c: 3b 5d 0c cmp 0xc(%ebp),%ebx
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29f: 7c cf jl 270 <gets+0x10>
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break;
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}
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}
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buf[i] = '\0';
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2a1: 8b 45 08 mov 0x8(%ebp),%eax
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2a4: c6 04 30 00 movb $0x0,(%eax,%esi,1)
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return buf;
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}
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2a8: 8d 65 f4 lea -0xc(%ebp),%esp
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2ab: 5b pop %ebx
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2ac: 5e pop %esi
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2ad: 5f pop %edi
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2ae: 5d pop %ebp
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2af: c3 ret
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buf[i] = '\0';
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2b0: 8b 45 08 mov 0x8(%ebp),%eax
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2b3: 89 de mov %ebx,%esi
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2b5: c6 04 30 00 movb $0x0,(%eax,%esi,1)
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}
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2b9: 8d 65 f4 lea -0xc(%ebp),%esp
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2bc: 5b pop %ebx
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2bd: 5e pop %esi
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2be: 5f pop %edi
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2bf: 5d pop %ebp
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2c0: c3 ret
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2c1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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2c8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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2cf: 90 nop
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000002d0 <stat>:
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int stat(const char *n, struct stat *st) {
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2d0: 55 push %ebp
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2d1: 89 e5 mov %esp,%ebp
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2d3: 56 push %esi
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2d4: 53 push %ebx
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int fd;
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int r;
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|
|
fd = open(n, O_RDONLY);
|
|
2d5: 83 ec 08 sub $0x8,%esp
|
|
2d8: 6a 00 push $0x0
|
|
2da: ff 75 08 push 0x8(%ebp)
|
|
2dd: e8 19 01 00 00 call 3fb <open>
|
|
if (fd < 0) {
|
|
2e2: 83 c4 10 add $0x10,%esp
|
|
2e5: 85 c0 test %eax,%eax
|
|
2e7: 78 27 js 310 <stat+0x40>
|
|
return -1;
|
|
}
|
|
r = fstat(fd, st);
|
|
2e9: 83 ec 08 sub $0x8,%esp
|
|
2ec: ff 75 0c push 0xc(%ebp)
|
|
2ef: 89 c3 mov %eax,%ebx
|
|
2f1: 50 push %eax
|
|
2f2: e8 cc 00 00 00 call 3c3 <fstat>
|
|
close(fd);
|
|
2f7: 89 1c 24 mov %ebx,(%esp)
|
|
r = fstat(fd, st);
|
|
2fa: 89 c6 mov %eax,%esi
|
|
close(fd);
|
|
2fc: e8 2a 01 00 00 call 42b <close>
|
|
return r;
|
|
301: 83 c4 10 add $0x10,%esp
|
|
}
|
|
304: 8d 65 f8 lea -0x8(%ebp),%esp
|
|
307: 89 f0 mov %esi,%eax
|
|
309: 5b pop %ebx
|
|
30a: 5e pop %esi
|
|
30b: 5d pop %ebp
|
|
30c: c3 ret
|
|
30d: 8d 76 00 lea 0x0(%esi),%esi
|
|
return -1;
|
|
310: be ff ff ff ff mov $0xffffffff,%esi
|
|
315: eb ed jmp 304 <stat+0x34>
|
|
317: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
31e: 66 90 xchg %ax,%ax
|
|
|
|
00000320 <atoi>:
|
|
|
|
int atoi(const char *s) {
|
|
320: 55 push %ebp
|
|
321: 89 e5 mov %esp,%ebp
|
|
323: 53 push %ebx
|
|
324: 8b 55 08 mov 0x8(%ebp),%edx
|
|
int n;
|
|
|
|
n = 0;
|
|
while ('0' <= *s && *s <= '9') {
|
|
327: 0f be 02 movsbl (%edx),%eax
|
|
32a: 8d 48 d0 lea -0x30(%eax),%ecx
|
|
32d: 80 f9 09 cmp $0x9,%cl
|
|
n = 0;
|
|
330: b9 00 00 00 00 mov $0x0,%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
335: 77 1e ja 355 <atoi+0x35>
|
|
337: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
33e: 66 90 xchg %ax,%ax
|
|
n = n * 10 + *s++ - '0';
|
|
340: 83 c2 01 add $0x1,%edx
|
|
343: 8d 0c 89 lea (%ecx,%ecx,4),%ecx
|
|
346: 8d 4c 48 d0 lea -0x30(%eax,%ecx,2),%ecx
|
|
while ('0' <= *s && *s <= '9') {
|
|
34a: 0f be 02 movsbl (%edx),%eax
|
|
34d: 8d 58 d0 lea -0x30(%eax),%ebx
|
|
350: 80 fb 09 cmp $0x9,%bl
|
|
353: 76 eb jbe 340 <atoi+0x20>
|
|
}
|
|
return n;
|
|
}
|
|
355: 8b 5d fc mov -0x4(%ebp),%ebx
|
|
358: 89 c8 mov %ecx,%eax
|
|
35a: c9 leave
|
|
35b: c3 ret
|
|
35c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
|
|
00000360 <memmove>:
|
|
|
|
void* memmove(void *vdst, const void *vsrc, int n) {
|
|
360: 55 push %ebp
|
|
361: 89 e5 mov %esp,%ebp
|
|
363: 57 push %edi
|
|
364: 8b 45 10 mov 0x10(%ebp),%eax
|
|
367: 8b 55 08 mov 0x8(%ebp),%edx
|
|
36a: 56 push %esi
|
|
36b: 8b 75 0c mov 0xc(%ebp),%esi
|
|
char *dst;
|
|
const char *src;
|
|
|
|
dst = vdst;
|
|
src = vsrc;
|
|
while (n-- > 0) {
|
|
36e: 85 c0 test %eax,%eax
|
|
370: 7e 13 jle 385 <memmove+0x25>
|
|
372: 01 d0 add %edx,%eax
|
|
dst = vdst;
|
|
374: 89 d7 mov %edx,%edi
|
|
376: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
37d: 8d 76 00 lea 0x0(%esi),%esi
|
|
*dst++ = *src++;
|
|
380: a4 movsb %ds:(%esi),%es:(%edi)
|
|
while (n-- > 0) {
|
|
381: 39 f8 cmp %edi,%eax
|
|
383: 75 fb jne 380 <memmove+0x20>
|
|
}
|
|
return vdst;
|
|
}
|
|
385: 5e pop %esi
|
|
386: 89 d0 mov %edx,%eax
|
|
388: 5f pop %edi
|
|
389: 5d pop %ebp
|
|
38a: c3 ret
|
|
|
|
0000038b <fork>:
|
|
name: \
|
|
movl $SYS_ ## name, %eax; \
|
|
int $T_SYSCALL; \
|
|
ret
|
|
|
|
SYSCALL(fork)
|
|
38b: b8 01 00 00 00 mov $0x1,%eax
|
|
390: cd 40 int $0x40
|
|
392: c3 ret
|
|
|
|
00000393 <exit>:
|
|
SYSCALL(exit)
|
|
393: b8 02 00 00 00 mov $0x2,%eax
|
|
398: cd 40 int $0x40
|
|
39a: c3 ret
|
|
|
|
0000039b <wait>:
|
|
SYSCALL(wait)
|
|
39b: b8 03 00 00 00 mov $0x3,%eax
|
|
3a0: cd 40 int $0x40
|
|
3a2: c3 ret
|
|
|
|
000003a3 <pipe>:
|
|
SYSCALL(pipe)
|
|
3a3: b8 04 00 00 00 mov $0x4,%eax
|
|
3a8: cd 40 int $0x40
|
|
3aa: c3 ret
|
|
|
|
000003ab <read>:
|
|
SYSCALL(read)
|
|
3ab: b8 05 00 00 00 mov $0x5,%eax
|
|
3b0: cd 40 int $0x40
|
|
3b2: c3 ret
|
|
|
|
000003b3 <kill>:
|
|
SYSCALL(kill)
|
|
3b3: b8 06 00 00 00 mov $0x6,%eax
|
|
3b8: cd 40 int $0x40
|
|
3ba: c3 ret
|
|
|
|
000003bb <exec>:
|
|
SYSCALL(exec)
|
|
3bb: b8 07 00 00 00 mov $0x7,%eax
|
|
3c0: cd 40 int $0x40
|
|
3c2: c3 ret
|
|
|
|
000003c3 <fstat>:
|
|
SYSCALL(fstat)
|
|
3c3: b8 08 00 00 00 mov $0x8,%eax
|
|
3c8: cd 40 int $0x40
|
|
3ca: c3 ret
|
|
|
|
000003cb <chdir>:
|
|
SYSCALL(chdir)
|
|
3cb: b8 09 00 00 00 mov $0x9,%eax
|
|
3d0: cd 40 int $0x40
|
|
3d2: c3 ret
|
|
|
|
000003d3 <dup>:
|
|
SYSCALL(dup)
|
|
3d3: b8 0a 00 00 00 mov $0xa,%eax
|
|
3d8: cd 40 int $0x40
|
|
3da: c3 ret
|
|
|
|
000003db <getpid>:
|
|
SYSCALL(getpid)
|
|
3db: b8 0b 00 00 00 mov $0xb,%eax
|
|
3e0: cd 40 int $0x40
|
|
3e2: c3 ret
|
|
|
|
000003e3 <sbrk>:
|
|
SYSCALL(sbrk)
|
|
3e3: b8 0c 00 00 00 mov $0xc,%eax
|
|
3e8: cd 40 int $0x40
|
|
3ea: c3 ret
|
|
|
|
000003eb <sleep>:
|
|
SYSCALL(sleep)
|
|
3eb: b8 0d 00 00 00 mov $0xd,%eax
|
|
3f0: cd 40 int $0x40
|
|
3f2: c3 ret
|
|
|
|
000003f3 <uptime>:
|
|
SYSCALL(uptime)
|
|
3f3: b8 0e 00 00 00 mov $0xe,%eax
|
|
3f8: cd 40 int $0x40
|
|
3fa: c3 ret
|
|
|
|
000003fb <open>:
|
|
SYSCALL(open)
|
|
3fb: b8 0f 00 00 00 mov $0xf,%eax
|
|
400: cd 40 int $0x40
|
|
402: c3 ret
|
|
|
|
00000403 <write>:
|
|
SYSCALL(write)
|
|
403: b8 10 00 00 00 mov $0x10,%eax
|
|
408: cd 40 int $0x40
|
|
40a: c3 ret
|
|
|
|
0000040b <mknod>:
|
|
SYSCALL(mknod)
|
|
40b: b8 11 00 00 00 mov $0x11,%eax
|
|
410: cd 40 int $0x40
|
|
412: c3 ret
|
|
|
|
00000413 <unlink>:
|
|
SYSCALL(unlink)
|
|
413: b8 12 00 00 00 mov $0x12,%eax
|
|
418: cd 40 int $0x40
|
|
41a: c3 ret
|
|
|
|
0000041b <link>:
|
|
SYSCALL(link)
|
|
41b: b8 13 00 00 00 mov $0x13,%eax
|
|
420: cd 40 int $0x40
|
|
422: c3 ret
|
|
|
|
00000423 <mkdir>:
|
|
SYSCALL(mkdir)
|
|
423: b8 14 00 00 00 mov $0x14,%eax
|
|
428: cd 40 int $0x40
|
|
42a: c3 ret
|
|
|
|
0000042b <close>:
|
|
SYSCALL(close)
|
|
42b: b8 15 00 00 00 mov $0x15,%eax
|
|
430: cd 40 int $0x40
|
|
432: c3 ret
|
|
|
|
00000433 <getch>:
|
|
SYSCALL(getch)
|
|
433: b8 16 00 00 00 mov $0x16,%eax
|
|
438: cd 40 int $0x40
|
|
43a: c3 ret
|
|
|
|
0000043b <greeting>:
|
|
SYSCALL(greeting)
|
|
43b: b8 17 00 00 00 mov $0x17,%eax
|
|
440: cd 40 int $0x40
|
|
442: c3 ret
|
|
|
|
00000443 <shutdown>:
|
|
SYSCALL(shutdown)
|
|
443: b8 18 00 00 00 mov $0x18,%eax
|
|
448: cd 40 int $0x40
|
|
44a: c3 ret
|
|
44b: 66 90 xchg %ax,%ax
|
|
44d: 66 90 xchg %ax,%ax
|
|
44f: 90 nop
|
|
|
|
00000450 <printint>:
|
|
|
|
static void putc(int fd, char c) {
|
|
write(fd, &c, 1);
|
|
}
|
|
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
450: 55 push %ebp
|
|
451: 89 e5 mov %esp,%ebp
|
|
453: 57 push %edi
|
|
454: 56 push %esi
|
|
455: 53 push %ebx
|
|
456: 83 ec 3c sub $0x3c,%esp
|
|
459: 89 4d c4 mov %ecx,-0x3c(%ebp)
|
|
uint x;
|
|
|
|
neg = 0;
|
|
if (sgn && xx < 0) {
|
|
neg = 1;
|
|
x = -xx;
|
|
45c: 89 d1 mov %edx,%ecx
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
45e: 89 45 b8 mov %eax,-0x48(%ebp)
|
|
if (sgn && xx < 0) {
|
|
461: 85 d2 test %edx,%edx
|
|
463: 0f 89 7f 00 00 00 jns 4e8 <printint+0x98>
|
|
469: f6 45 08 01 testb $0x1,0x8(%ebp)
|
|
46d: 74 79 je 4e8 <printint+0x98>
|
|
neg = 1;
|
|
46f: c7 45 bc 01 00 00 00 movl $0x1,-0x44(%ebp)
|
|
x = -xx;
|
|
476: f7 d9 neg %ecx
|
|
}
|
|
else {
|
|
x = xx;
|
|
}
|
|
|
|
i = 0;
|
|
478: 31 db xor %ebx,%ebx
|
|
47a: 8d 75 d7 lea -0x29(%ebp),%esi
|
|
47d: 8d 76 00 lea 0x0(%esi),%esi
|
|
do {
|
|
buf[i++] = digits[x % base];
|
|
480: 89 c8 mov %ecx,%eax
|
|
482: 31 d2 xor %edx,%edx
|
|
484: 89 cf mov %ecx,%edi
|
|
486: f7 75 c4 divl -0x3c(%ebp)
|
|
489: 0f b6 92 ac 08 00 00 movzbl 0x8ac(%edx),%edx
|
|
490: 89 45 c0 mov %eax,-0x40(%ebp)
|
|
493: 89 d8 mov %ebx,%eax
|
|
495: 8d 5b 01 lea 0x1(%ebx),%ebx
|
|
}
|
|
while ((x /= base) != 0);
|
|
498: 8b 4d c0 mov -0x40(%ebp),%ecx
|
|
buf[i++] = digits[x % base];
|
|
49b: 88 14 1e mov %dl,(%esi,%ebx,1)
|
|
while ((x /= base) != 0);
|
|
49e: 39 7d c4 cmp %edi,-0x3c(%ebp)
|
|
4a1: 76 dd jbe 480 <printint+0x30>
|
|
if (neg) {
|
|
4a3: 8b 4d bc mov -0x44(%ebp),%ecx
|
|
4a6: 85 c9 test %ecx,%ecx
|
|
4a8: 74 0c je 4b6 <printint+0x66>
|
|
buf[i++] = '-';
|
|
4aa: c6 44 1d d8 2d movb $0x2d,-0x28(%ebp,%ebx,1)
|
|
buf[i++] = digits[x % base];
|
|
4af: 89 d8 mov %ebx,%eax
|
|
buf[i++] = '-';
|
|
4b1: ba 2d 00 00 00 mov $0x2d,%edx
|
|
}
|
|
|
|
while (--i >= 0) {
|
|
4b6: 8b 7d b8 mov -0x48(%ebp),%edi
|
|
4b9: 8d 5c 05 d7 lea -0x29(%ebp,%eax,1),%ebx
|
|
4bd: eb 07 jmp 4c6 <printint+0x76>
|
|
4bf: 90 nop
|
|
putc(fd, buf[i]);
|
|
4c0: 0f b6 13 movzbl (%ebx),%edx
|
|
4c3: 83 eb 01 sub $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
4c6: 83 ec 04 sub $0x4,%esp
|
|
4c9: 88 55 d7 mov %dl,-0x29(%ebp)
|
|
4cc: 6a 01 push $0x1
|
|
4ce: 56 push %esi
|
|
4cf: 57 push %edi
|
|
4d0: e8 2e ff ff ff call 403 <write>
|
|
while (--i >= 0) {
|
|
4d5: 83 c4 10 add $0x10,%esp
|
|
4d8: 39 de cmp %ebx,%esi
|
|
4da: 75 e4 jne 4c0 <printint+0x70>
|
|
}
|
|
}
|
|
4dc: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
4df: 5b pop %ebx
|
|
4e0: 5e pop %esi
|
|
4e1: 5f pop %edi
|
|
4e2: 5d pop %ebp
|
|
4e3: c3 ret
|
|
4e4: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
neg = 0;
|
|
4e8: c7 45 bc 00 00 00 00 movl $0x0,-0x44(%ebp)
|
|
4ef: eb 87 jmp 478 <printint+0x28>
|
|
4f1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
4f8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
4ff: 90 nop
|
|
|
|
00000500 <printf>:
|
|
|
|
// Print to the given fd. Only understands %d, %x, %p, %s.
|
|
void printf(int fd, const char *fmt, ...) {
|
|
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 2c sub $0x2c,%esp
|
|
int c, i, state;
|
|
uint *ap;
|
|
|
|
state = 0;
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
for (i = 0; fmt[i]; i++) {
|
|
509: 8b 5d 0c mov 0xc(%ebp),%ebx
|
|
void printf(int fd, const char *fmt, ...) {
|
|
50c: 8b 75 08 mov 0x8(%ebp),%esi
|
|
for (i = 0; fmt[i]; i++) {
|
|
50f: 0f b6 13 movzbl (%ebx),%edx
|
|
512: 84 d2 test %dl,%dl
|
|
514: 74 6a je 580 <printf+0x80>
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
516: 8d 45 10 lea 0x10(%ebp),%eax
|
|
519: 83 c3 01 add $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
51c: 8d 7d e7 lea -0x19(%ebp),%edi
|
|
state = 0;
|
|
51f: 31 c9 xor %ecx,%ecx
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
521: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
524: eb 36 jmp 55c <printf+0x5c>
|
|
526: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
52d: 8d 76 00 lea 0x0(%esi),%esi
|
|
530: 89 4d d4 mov %ecx,-0x2c(%ebp)
|
|
c = fmt[i] & 0xff;
|
|
if (state == 0) {
|
|
if (c == '%') {
|
|
state = '%';
|
|
533: b9 25 00 00 00 mov $0x25,%ecx
|
|
if (c == '%') {
|
|
538: 83 f8 25 cmp $0x25,%eax
|
|
53b: 74 15 je 552 <printf+0x52>
|
|
write(fd, &c, 1);
|
|
53d: 83 ec 04 sub $0x4,%esp
|
|
540: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
543: 6a 01 push $0x1
|
|
545: 57 push %edi
|
|
546: 56 push %esi
|
|
547: e8 b7 fe ff ff call 403 <write>
|
|
54c: 8b 4d d4 mov -0x2c(%ebp),%ecx
|
|
}
|
|
else {
|
|
putc(fd, c);
|
|
54f: 83 c4 10 add $0x10,%esp
|
|
for (i = 0; fmt[i]; i++) {
|
|
552: 0f b6 13 movzbl (%ebx),%edx
|
|
555: 83 c3 01 add $0x1,%ebx
|
|
558: 84 d2 test %dl,%dl
|
|
55a: 74 24 je 580 <printf+0x80>
|
|
c = fmt[i] & 0xff;
|
|
55c: 0f b6 c2 movzbl %dl,%eax
|
|
if (state == 0) {
|
|
55f: 85 c9 test %ecx,%ecx
|
|
561: 74 cd je 530 <printf+0x30>
|
|
}
|
|
}
|
|
else if (state == '%') {
|
|
563: 83 f9 25 cmp $0x25,%ecx
|
|
566: 75 ea jne 552 <printf+0x52>
|
|
if (c == 'd') {
|
|
568: 83 f8 25 cmp $0x25,%eax
|
|
56b: 0f 84 07 01 00 00 je 678 <printf+0x178>
|
|
571: 83 e8 63 sub $0x63,%eax
|
|
574: 83 f8 15 cmp $0x15,%eax
|
|
577: 77 17 ja 590 <printf+0x90>
|
|
579: ff 24 85 54 08 00 00 jmp *0x854(,%eax,4)
|
|
putc(fd, c);
|
|
}
|
|
state = 0;
|
|
}
|
|
}
|
|
}
|
|
580: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
583: 5b pop %ebx
|
|
584: 5e pop %esi
|
|
585: 5f pop %edi
|
|
586: 5d pop %ebp
|
|
587: c3 ret
|
|
588: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
58f: 90 nop
|
|
write(fd, &c, 1);
|
|
590: 83 ec 04 sub $0x4,%esp
|
|
593: 88 55 d4 mov %dl,-0x2c(%ebp)
|
|
596: 6a 01 push $0x1
|
|
598: 57 push %edi
|
|
599: 56 push %esi
|
|
59a: c6 45 e7 25 movb $0x25,-0x19(%ebp)
|
|
59e: e8 60 fe ff ff call 403 <write>
|
|
putc(fd, c);
|
|
5a3: 0f b6 55 d4 movzbl -0x2c(%ebp),%edx
|
|
write(fd, &c, 1);
|
|
5a7: 83 c4 0c add $0xc,%esp
|
|
5aa: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
5ad: 6a 01 push $0x1
|
|
5af: 57 push %edi
|
|
5b0: 56 push %esi
|
|
5b1: e8 4d fe ff ff call 403 <write>
|
|
putc(fd, c);
|
|
5b6: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
5b9: 31 c9 xor %ecx,%ecx
|
|
5bb: eb 95 jmp 552 <printf+0x52>
|
|
5bd: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 16, 0);
|
|
5c0: 83 ec 0c sub $0xc,%esp
|
|
5c3: b9 10 00 00 00 mov $0x10,%ecx
|
|
5c8: 6a 00 push $0x0
|
|
5ca: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
5cd: 8b 10 mov (%eax),%edx
|
|
5cf: 89 f0 mov %esi,%eax
|
|
5d1: e8 7a fe ff ff call 450 <printint>
|
|
ap++;
|
|
5d6: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
5da: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
5dd: 31 c9 xor %ecx,%ecx
|
|
5df: e9 6e ff ff ff jmp 552 <printf+0x52>
|
|
5e4: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
s = (char*)*ap;
|
|
5e8: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
5eb: 8b 10 mov (%eax),%edx
|
|
ap++;
|
|
5ed: 83 c0 04 add $0x4,%eax
|
|
5f0: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
if (s == 0) {
|
|
5f3: 85 d2 test %edx,%edx
|
|
5f5: 0f 84 8d 00 00 00 je 688 <printf+0x188>
|
|
while (*s != 0) {
|
|
5fb: 0f b6 02 movzbl (%edx),%eax
|
|
state = 0;
|
|
5fe: 31 c9 xor %ecx,%ecx
|
|
while (*s != 0) {
|
|
600: 84 c0 test %al,%al
|
|
602: 0f 84 4a ff ff ff je 552 <printf+0x52>
|
|
608: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
60b: 89 d3 mov %edx,%ebx
|
|
60d: 8d 76 00 lea 0x0(%esi),%esi
|
|
write(fd, &c, 1);
|
|
610: 83 ec 04 sub $0x4,%esp
|
|
s++;
|
|
613: 83 c3 01 add $0x1,%ebx
|
|
616: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
619: 6a 01 push $0x1
|
|
61b: 57 push %edi
|
|
61c: 56 push %esi
|
|
61d: e8 e1 fd ff ff call 403 <write>
|
|
while (*s != 0) {
|
|
622: 0f b6 03 movzbl (%ebx),%eax
|
|
625: 83 c4 10 add $0x10,%esp
|
|
628: 84 c0 test %al,%al
|
|
62a: 75 e4 jne 610 <printf+0x110>
|
|
state = 0;
|
|
62c: 8b 5d d4 mov -0x2c(%ebp),%ebx
|
|
62f: 31 c9 xor %ecx,%ecx
|
|
631: e9 1c ff ff ff jmp 552 <printf+0x52>
|
|
636: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
63d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 10, 1);
|
|
640: 83 ec 0c sub $0xc,%esp
|
|
643: b9 0a 00 00 00 mov $0xa,%ecx
|
|
648: 6a 01 push $0x1
|
|
64a: e9 7b ff ff ff jmp 5ca <printf+0xca>
|
|
64f: 90 nop
|
|
putc(fd, *ap);
|
|
650: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
write(fd, &c, 1);
|
|
653: 83 ec 04 sub $0x4,%esp
|
|
putc(fd, *ap);
|
|
656: 8b 00 mov (%eax),%eax
|
|
write(fd, &c, 1);
|
|
658: 6a 01 push $0x1
|
|
65a: 57 push %edi
|
|
65b: 56 push %esi
|
|
putc(fd, *ap);
|
|
65c: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
65f: e8 9f fd ff ff call 403 <write>
|
|
ap++;
|
|
664: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
668: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
66b: 31 c9 xor %ecx,%ecx
|
|
66d: e9 e0 fe ff ff jmp 552 <printf+0x52>
|
|
672: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
putc(fd, c);
|
|
678: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
67b: 83 ec 04 sub $0x4,%esp
|
|
67e: e9 2a ff ff ff jmp 5ad <printf+0xad>
|
|
683: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
687: 90 nop
|
|
s = "(null)";
|
|
688: ba 4b 08 00 00 mov $0x84b,%edx
|
|
while (*s != 0) {
|
|
68d: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
690: b8 28 00 00 00 mov $0x28,%eax
|
|
695: 89 d3 mov %edx,%ebx
|
|
697: e9 74 ff ff ff jmp 610 <printf+0x110>
|
|
69c: 66 90 xchg %ax,%ax
|
|
69e: 66 90 xchg %ax,%ax
|
|
|
|
000006a0 <free>:
|
|
typedef union header Header;
|
|
|
|
static Header base;
|
|
static Header *freep;
|
|
|
|
void free(void *ap) {
|
|
6a0: 55 push %ebp
|
|
Header *bp, *p;
|
|
|
|
bp = (Header*)ap - 1;
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
6a1: a1 64 0b 00 00 mov 0xb64,%eax
|
|
void free(void *ap) {
|
|
6a6: 89 e5 mov %esp,%ebp
|
|
6a8: 57 push %edi
|
|
6a9: 56 push %esi
|
|
6aa: 53 push %ebx
|
|
6ab: 8b 5d 08 mov 0x8(%ebp),%ebx
|
|
bp = (Header*)ap - 1;
|
|
6ae: 8d 4b f8 lea -0x8(%ebx),%ecx
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
6b1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
6b8: 89 c2 mov %eax,%edx
|
|
6ba: 8b 00 mov (%eax),%eax
|
|
6bc: 39 ca cmp %ecx,%edx
|
|
6be: 73 30 jae 6f0 <free+0x50>
|
|
6c0: 39 c1 cmp %eax,%ecx
|
|
6c2: 72 04 jb 6c8 <free+0x28>
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
6c4: 39 c2 cmp %eax,%edx
|
|
6c6: 72 f0 jb 6b8 <free+0x18>
|
|
break;
|
|
}
|
|
}
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
6c8: 8b 73 fc mov -0x4(%ebx),%esi
|
|
6cb: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
6ce: 39 f8 cmp %edi,%eax
|
|
6d0: 74 30 je 702 <free+0x62>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
6d2: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
}
|
|
else {
|
|
bp->s.ptr = p->s.ptr;
|
|
}
|
|
if (p + p->s.size == bp) {
|
|
6d5: 8b 42 04 mov 0x4(%edx),%eax
|
|
6d8: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
6db: 39 f1 cmp %esi,%ecx
|
|
6dd: 74 3a je 719 <free+0x79>
|
|
p->s.size += bp->s.size;
|
|
p->s.ptr = bp->s.ptr;
|
|
6df: 89 0a mov %ecx,(%edx)
|
|
}
|
|
else {
|
|
p->s.ptr = bp;
|
|
}
|
|
freep = p;
|
|
}
|
|
6e1: 5b pop %ebx
|
|
freep = p;
|
|
6e2: 89 15 64 0b 00 00 mov %edx,0xb64
|
|
}
|
|
6e8: 5e pop %esi
|
|
6e9: 5f pop %edi
|
|
6ea: 5d pop %ebp
|
|
6eb: c3 ret
|
|
6ec: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
6f0: 39 c2 cmp %eax,%edx
|
|
6f2: 72 c4 jb 6b8 <free+0x18>
|
|
6f4: 39 c1 cmp %eax,%ecx
|
|
6f6: 73 c0 jae 6b8 <free+0x18>
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
6f8: 8b 73 fc mov -0x4(%ebx),%esi
|
|
6fb: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
6fe: 39 f8 cmp %edi,%eax
|
|
700: 75 d0 jne 6d2 <free+0x32>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
702: 03 70 04 add 0x4(%eax),%esi
|
|
705: 89 73 fc mov %esi,-0x4(%ebx)
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
708: 8b 02 mov (%edx),%eax
|
|
70a: 8b 00 mov (%eax),%eax
|
|
70c: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
if (p + p->s.size == bp) {
|
|
70f: 8b 42 04 mov 0x4(%edx),%eax
|
|
712: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
715: 39 f1 cmp %esi,%ecx
|
|
717: 75 c6 jne 6df <free+0x3f>
|
|
p->s.size += bp->s.size;
|
|
719: 03 43 fc add -0x4(%ebx),%eax
|
|
freep = p;
|
|
71c: 89 15 64 0b 00 00 mov %edx,0xb64
|
|
p->s.size += bp->s.size;
|
|
722: 89 42 04 mov %eax,0x4(%edx)
|
|
p->s.ptr = bp->s.ptr;
|
|
725: 8b 4b f8 mov -0x8(%ebx),%ecx
|
|
728: 89 0a mov %ecx,(%edx)
|
|
}
|
|
72a: 5b pop %ebx
|
|
72b: 5e pop %esi
|
|
72c: 5f pop %edi
|
|
72d: 5d pop %ebp
|
|
72e: c3 ret
|
|
72f: 90 nop
|
|
|
|
00000730 <malloc>:
|
|
hp->s.size = nu;
|
|
free((void*)(hp + 1));
|
|
return freep;
|
|
}
|
|
|
|
void* malloc(uint nbytes) {
|
|
730: 55 push %ebp
|
|
731: 89 e5 mov %esp,%ebp
|
|
733: 57 push %edi
|
|
734: 56 push %esi
|
|
735: 53 push %ebx
|
|
736: 83 ec 1c sub $0x1c,%esp
|
|
Header *p, *prevp;
|
|
uint nunits;
|
|
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
739: 8b 45 08 mov 0x8(%ebp),%eax
|
|
if ((prevp = freep) == 0) {
|
|
73c: 8b 3d 64 0b 00 00 mov 0xb64,%edi
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
742: 8d 70 07 lea 0x7(%eax),%esi
|
|
745: c1 ee 03 shr $0x3,%esi
|
|
748: 83 c6 01 add $0x1,%esi
|
|
if ((prevp = freep) == 0) {
|
|
74b: 85 ff test %edi,%edi
|
|
74d: 0f 84 9d 00 00 00 je 7f0 <malloc+0xc0>
|
|
base.s.ptr = freep = prevp = &base;
|
|
base.s.size = 0;
|
|
}
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
753: 8b 17 mov (%edi),%edx
|
|
if (p->s.size >= nunits) {
|
|
755: 8b 4a 04 mov 0x4(%edx),%ecx
|
|
758: 39 f1 cmp %esi,%ecx
|
|
75a: 73 6a jae 7c6 <malloc+0x96>
|
|
75c: bb 00 10 00 00 mov $0x1000,%ebx
|
|
761: 39 de cmp %ebx,%esi
|
|
763: 0f 43 de cmovae %esi,%ebx
|
|
p = sbrk(nu * sizeof(Header));
|
|
766: 8d 04 dd 00 00 00 00 lea 0x0(,%ebx,8),%eax
|
|
76d: 89 45 e4 mov %eax,-0x1c(%ebp)
|
|
770: eb 17 jmp 789 <malloc+0x59>
|
|
772: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
778: 8b 02 mov (%edx),%eax
|
|
if (p->s.size >= nunits) {
|
|
77a: 8b 48 04 mov 0x4(%eax),%ecx
|
|
77d: 39 f1 cmp %esi,%ecx
|
|
77f: 73 4f jae 7d0 <malloc+0xa0>
|
|
p->s.size = nunits;
|
|
}
|
|
freep = prevp;
|
|
return (void*)(p + 1);
|
|
}
|
|
if (p == freep) {
|
|
781: 8b 3d 64 0b 00 00 mov 0xb64,%edi
|
|
787: 89 c2 mov %eax,%edx
|
|
789: 39 d7 cmp %edx,%edi
|
|
78b: 75 eb jne 778 <malloc+0x48>
|
|
p = sbrk(nu * sizeof(Header));
|
|
78d: 83 ec 0c sub $0xc,%esp
|
|
790: ff 75 e4 push -0x1c(%ebp)
|
|
793: e8 4b fc ff ff call 3e3 <sbrk>
|
|
if (p == (char*)-1) {
|
|
798: 83 c4 10 add $0x10,%esp
|
|
79b: 83 f8 ff cmp $0xffffffff,%eax
|
|
79e: 74 1c je 7bc <malloc+0x8c>
|
|
hp->s.size = nu;
|
|
7a0: 89 58 04 mov %ebx,0x4(%eax)
|
|
free((void*)(hp + 1));
|
|
7a3: 83 ec 0c sub $0xc,%esp
|
|
7a6: 83 c0 08 add $0x8,%eax
|
|
7a9: 50 push %eax
|
|
7aa: e8 f1 fe ff ff call 6a0 <free>
|
|
return freep;
|
|
7af: 8b 15 64 0b 00 00 mov 0xb64,%edx
|
|
if ((p = morecore(nunits)) == 0) {
|
|
7b5: 83 c4 10 add $0x10,%esp
|
|
7b8: 85 d2 test %edx,%edx
|
|
7ba: 75 bc jne 778 <malloc+0x48>
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
7bc: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return 0;
|
|
7bf: 31 c0 xor %eax,%eax
|
|
}
|
|
7c1: 5b pop %ebx
|
|
7c2: 5e pop %esi
|
|
7c3: 5f pop %edi
|
|
7c4: 5d pop %ebp
|
|
7c5: c3 ret
|
|
if (p->s.size >= nunits) {
|
|
7c6: 89 d0 mov %edx,%eax
|
|
7c8: 89 fa mov %edi,%edx
|
|
7ca: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
if (p->s.size == nunits) {
|
|
7d0: 39 ce cmp %ecx,%esi
|
|
7d2: 74 4c je 820 <malloc+0xf0>
|
|
p->s.size -= nunits;
|
|
7d4: 29 f1 sub %esi,%ecx
|
|
7d6: 89 48 04 mov %ecx,0x4(%eax)
|
|
p += p->s.size;
|
|
7d9: 8d 04 c8 lea (%eax,%ecx,8),%eax
|
|
p->s.size = nunits;
|
|
7dc: 89 70 04 mov %esi,0x4(%eax)
|
|
freep = prevp;
|
|
7df: 89 15 64 0b 00 00 mov %edx,0xb64
|
|
}
|
|
7e5: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return (void*)(p + 1);
|
|
7e8: 83 c0 08 add $0x8,%eax
|
|
}
|
|
7eb: 5b pop %ebx
|
|
7ec: 5e pop %esi
|
|
7ed: 5f pop %edi
|
|
7ee: 5d pop %ebp
|
|
7ef: c3 ret
|
|
base.s.ptr = freep = prevp = &base;
|
|
7f0: c7 05 64 0b 00 00 68 movl $0xb68,0xb64
|
|
7f7: 0b 00 00
|
|
base.s.size = 0;
|
|
7fa: bf 68 0b 00 00 mov $0xb68,%edi
|
|
base.s.ptr = freep = prevp = &base;
|
|
7ff: c7 05 68 0b 00 00 68 movl $0xb68,0xb68
|
|
806: 0b 00 00
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
809: 89 fa mov %edi,%edx
|
|
base.s.size = 0;
|
|
80b: c7 05 6c 0b 00 00 00 movl $0x0,0xb6c
|
|
812: 00 00 00
|
|
if (p->s.size >= nunits) {
|
|
815: e9 42 ff ff ff jmp 75c <malloc+0x2c>
|
|
81a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
prevp->s.ptr = p->s.ptr;
|
|
820: 8b 08 mov (%eax),%ecx
|
|
822: 89 0a mov %ecx,(%edx)
|
|
824: eb b9 jmp 7df <malloc+0xaf>
|