1182 lines
40 KiB
NASM
1182 lines
40 KiB
NASM
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_ln: file format elf32-i386
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Disassembly of section .text:
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00000000 <main>:
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#include "types.h"
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#include "stat.h"
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#include "user.h"
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int main(int argc, char *argv[]) {
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0: 8d 4c 24 04 lea 0x4(%esp),%ecx
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4: 83 e4 f0 and $0xfffffff0,%esp
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7: ff 71 fc push -0x4(%ecx)
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if (argc != 3) {
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a: 83 39 03 cmpl $0x3,(%ecx)
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int main(int argc, char *argv[]) {
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d: 55 push %ebp
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e: 89 e5 mov %esp,%ebp
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10: 53 push %ebx
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11: 51 push %ecx
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12: 8b 59 04 mov 0x4(%ecx),%ebx
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if (argc != 3) {
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15: 74 13 je 2a <main+0x2a>
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printf(2, "Usage: ln old new\n");
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17: 52 push %edx
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18: 52 push %edx
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19: 68 58 07 00 00 push $0x758
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1e: 6a 02 push $0x2
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20: e8 0b 04 00 00 call 430 <printf>
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exit();
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25: e8 89 02 00 00 call 2b3 <exit>
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}
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if (link(argv[1], argv[2]) < 0) {
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2a: 50 push %eax
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2b: 50 push %eax
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2c: ff 73 08 push 0x8(%ebx)
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2f: ff 73 04 push 0x4(%ebx)
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32: e8 04 03 00 00 call 33b <link>
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37: 83 c4 10 add $0x10,%esp
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3a: 85 c0 test %eax,%eax
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3c: 78 05 js 43 <main+0x43>
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printf(2, "link %s %s: failed\n", argv[1], argv[2]);
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}
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exit();
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3e: e8 70 02 00 00 call 2b3 <exit>
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printf(2, "link %s %s: failed\n", argv[1], argv[2]);
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43: ff 73 08 push 0x8(%ebx)
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46: ff 73 04 push 0x4(%ebx)
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49: 68 6b 07 00 00 push $0x76b
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4e: 6a 02 push $0x2
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50: e8 db 03 00 00 call 430 <printf>
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55: 83 c4 10 add $0x10,%esp
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58: eb e4 jmp 3e <main+0x3e>
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5a: 66 90 xchg %ax,%ax
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5c: 66 90 xchg %ax,%ax
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5e: 66 90 xchg %ax,%ax
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00000060 <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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60: 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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61: 31 c0 xor %eax,%eax
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char*strcpy(char *s, const char *t) {
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63: 89 e5 mov %esp,%ebp
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65: 53 push %ebx
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66: 8b 4d 08 mov 0x8(%ebp),%ecx
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69: 8b 5d 0c mov 0xc(%ebp),%ebx
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6c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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while ((*s++ = *t++) != 0) {
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70: 0f b6 14 03 movzbl (%ebx,%eax,1),%edx
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74: 88 14 01 mov %dl,(%ecx,%eax,1)
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77: 83 c0 01 add $0x1,%eax
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7a: 84 d2 test %dl,%dl
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7c: 75 f2 jne 70 <strcpy+0x10>
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;
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}
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return os;
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}
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7e: 8b 5d fc mov -0x4(%ebp),%ebx
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81: 89 c8 mov %ecx,%eax
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83: c9 leave
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84: c3 ret
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85: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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8c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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00000090 <strcmp>:
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int strcmp(const char *p, const char *q) {
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90: 55 push %ebp
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91: 89 e5 mov %esp,%ebp
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93: 53 push %ebx
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94: 8b 55 08 mov 0x8(%ebp),%edx
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97: 8b 4d 0c mov 0xc(%ebp),%ecx
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while (*p && *p == *q) {
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9a: 0f b6 02 movzbl (%edx),%eax
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9d: 84 c0 test %al,%al
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9f: 75 17 jne b8 <strcmp+0x28>
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a1: eb 3a jmp dd <strcmp+0x4d>
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a3: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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a7: 90 nop
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a8: 0f b6 42 01 movzbl 0x1(%edx),%eax
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p++, q++;
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ac: 83 c2 01 add $0x1,%edx
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af: 8d 59 01 lea 0x1(%ecx),%ebx
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while (*p && *p == *q) {
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b2: 84 c0 test %al,%al
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b4: 74 1a je d0 <strcmp+0x40>
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p++, q++;
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b6: 89 d9 mov %ebx,%ecx
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while (*p && *p == *q) {
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b8: 0f b6 19 movzbl (%ecx),%ebx
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bb: 38 c3 cmp %al,%bl
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bd: 74 e9 je a8 <strcmp+0x18>
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}
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return (uchar) * p - (uchar) * q;
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bf: 29 d8 sub %ebx,%eax
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}
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c1: 8b 5d fc mov -0x4(%ebp),%ebx
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c4: c9 leave
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c5: c3 ret
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c6: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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cd: 8d 76 00 lea 0x0(%esi),%esi
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return (uchar) * p - (uchar) * q;
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d0: 0f b6 59 01 movzbl 0x1(%ecx),%ebx
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d4: 31 c0 xor %eax,%eax
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d6: 29 d8 sub %ebx,%eax
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}
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d8: 8b 5d fc mov -0x4(%ebp),%ebx
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db: c9 leave
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dc: c3 ret
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return (uchar) * p - (uchar) * q;
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dd: 0f b6 19 movzbl (%ecx),%ebx
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e0: 31 c0 xor %eax,%eax
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e2: eb db jmp bf <strcmp+0x2f>
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e4: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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eb: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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ef: 90 nop
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000000f0 <strlen>:
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uint strlen(const char *s) {
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f0: 55 push %ebp
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f1: 89 e5 mov %esp,%ebp
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f3: 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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f6: 80 3a 00 cmpb $0x0,(%edx)
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f9: 74 15 je 110 <strlen+0x20>
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fb: 31 c0 xor %eax,%eax
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fd: 8d 76 00 lea 0x0(%esi),%esi
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100: 83 c0 01 add $0x1,%eax
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103: 80 3c 02 00 cmpb $0x0,(%edx,%eax,1)
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107: 89 c1 mov %eax,%ecx
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109: 75 f5 jne 100 <strlen+0x10>
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;
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}
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return n;
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}
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10b: 89 c8 mov %ecx,%eax
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10d: 5d pop %ebp
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10e: c3 ret
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10f: 90 nop
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for (n = 0; s[n]; n++) {
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110: 31 c9 xor %ecx,%ecx
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}
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112: 5d pop %ebp
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113: 89 c8 mov %ecx,%eax
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115: c3 ret
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116: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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11d: 8d 76 00 lea 0x0(%esi),%esi
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00000120 <memset>:
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void* memset(void *dst, int c, uint n) {
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120: 55 push %ebp
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121: 89 e5 mov %esp,%ebp
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123: 57 push %edi
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124: 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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127: 8b 4d 10 mov 0x10(%ebp),%ecx
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12a: 8b 45 0c mov 0xc(%ebp),%eax
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12d: 89 d7 mov %edx,%edi
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12f: fc cld
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130: 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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132: 8b 7d fc mov -0x4(%ebp),%edi
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135: 89 d0 mov %edx,%eax
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137: c9 leave
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138: c3 ret
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139: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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00000140 <strchr>:
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char* strchr(const char *s, char c) {
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140: 55 push %ebp
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141: 89 e5 mov %esp,%ebp
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143: 8b 45 08 mov 0x8(%ebp),%eax
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146: 0f b6 4d 0c movzbl 0xc(%ebp),%ecx
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for (; *s; s++) {
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14a: 0f b6 10 movzbl (%eax),%edx
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14d: 84 d2 test %dl,%dl
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14f: 75 12 jne 163 <strchr+0x23>
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151: eb 1d jmp 170 <strchr+0x30>
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153: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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157: 90 nop
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158: 0f b6 50 01 movzbl 0x1(%eax),%edx
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15c: 83 c0 01 add $0x1,%eax
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15f: 84 d2 test %dl,%dl
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161: 74 0d je 170 <strchr+0x30>
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if (*s == c) {
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163: 38 d1 cmp %dl,%cl
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165: 75 f1 jne 158 <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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167: 5d pop %ebp
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168: c3 ret
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169: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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return 0;
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170: 31 c0 xor %eax,%eax
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}
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172: 5d pop %ebp
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173: c3 ret
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174: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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17b: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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17f: 90 nop
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00000180 <gets>:
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char* gets(char *buf, int max) {
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180: 55 push %ebp
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181: 89 e5 mov %esp,%ebp
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183: 57 push %edi
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184: 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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185: 8d 7d e7 lea -0x19(%ebp),%edi
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char* gets(char *buf, int max) {
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188: 53 push %ebx
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for (i = 0; i + 1 < max;) {
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189: 31 db xor %ebx,%ebx
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char* gets(char *buf, int max) {
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18b: 83 ec 1c sub $0x1c,%esp
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for (i = 0; i + 1 < max;) {
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18e: eb 27 jmp 1b7 <gets+0x37>
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cc = read(0, &c, 1);
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190: 83 ec 04 sub $0x4,%esp
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193: 6a 01 push $0x1
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195: 57 push %edi
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196: 6a 00 push $0x0
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198: e8 2e 01 00 00 call 2cb <read>
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if (cc < 1) {
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19d: 83 c4 10 add $0x10,%esp
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1a0: 85 c0 test %eax,%eax
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1a2: 7e 1d jle 1c1 <gets+0x41>
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break;
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}
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buf[i++] = c;
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1a4: 0f b6 45 e7 movzbl -0x19(%ebp),%eax
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1a8: 8b 55 08 mov 0x8(%ebp),%edx
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1ab: 88 44 1a ff mov %al,-0x1(%edx,%ebx,1)
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if (c == '\n' || c == '\r') {
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1af: 3c 0a cmp $0xa,%al
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1b1: 74 1d je 1d0 <gets+0x50>
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1b3: 3c 0d cmp $0xd,%al
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1b5: 74 19 je 1d0 <gets+0x50>
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for (i = 0; i + 1 < max;) {
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1b7: 89 de mov %ebx,%esi
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1b9: 83 c3 01 add $0x1,%ebx
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1bc: 3b 5d 0c cmp 0xc(%ebp),%ebx
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1bf: 7c cf jl 190 <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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1c1: 8b 45 08 mov 0x8(%ebp),%eax
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1c4: c6 04 30 00 movb $0x0,(%eax,%esi,1)
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return buf;
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}
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1c8: 8d 65 f4 lea -0xc(%ebp),%esp
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1cb: 5b pop %ebx
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1cc: 5e pop %esi
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1cd: 5f pop %edi
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1ce: 5d pop %ebp
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1cf: c3 ret
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buf[i] = '\0';
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1d0: 8b 45 08 mov 0x8(%ebp),%eax
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1d3: 89 de mov %ebx,%esi
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1d5: c6 04 30 00 movb $0x0,(%eax,%esi,1)
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}
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1d9: 8d 65 f4 lea -0xc(%ebp),%esp
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1dc: 5b pop %ebx
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1dd: 5e pop %esi
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1de: 5f pop %edi
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1df: 5d pop %ebp
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1e0: c3 ret
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1e1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1e8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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1ef: 90 nop
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000001f0 <stat>:
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int stat(const char *n, struct stat *st) {
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1f0: 55 push %ebp
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1f1: 89 e5 mov %esp,%ebp
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1f3: 56 push %esi
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1f4: 53 push %ebx
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int fd;
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int r;
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fd = open(n, O_RDONLY);
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1f5: 83 ec 08 sub $0x8,%esp
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1f8: 6a 00 push $0x0
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1fa: ff 75 08 push 0x8(%ebp)
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1fd: e8 19 01 00 00 call 31b <open>
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if (fd < 0) {
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202: 83 c4 10 add $0x10,%esp
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205: 85 c0 test %eax,%eax
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207: 78 27 js 230 <stat+0x40>
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return -1;
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}
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r = fstat(fd, st);
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209: 83 ec 08 sub $0x8,%esp
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20c: ff 75 0c push 0xc(%ebp)
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20f: 89 c3 mov %eax,%ebx
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211: 50 push %eax
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212: e8 cc 00 00 00 call 2e3 <fstat>
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close(fd);
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217: 89 1c 24 mov %ebx,(%esp)
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r = fstat(fd, st);
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21a: 89 c6 mov %eax,%esi
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close(fd);
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21c: e8 2a 01 00 00 call 34b <close>
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return r;
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221: 83 c4 10 add $0x10,%esp
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}
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224: 8d 65 f8 lea -0x8(%ebp),%esp
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227: 89 f0 mov %esi,%eax
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229: 5b pop %ebx
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22a: 5e pop %esi
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22b: 5d pop %ebp
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22c: c3 ret
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22d: 8d 76 00 lea 0x0(%esi),%esi
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|
return -1;
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230: be ff ff ff ff mov $0xffffffff,%esi
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235: eb ed jmp 224 <stat+0x34>
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237: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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23e: 66 90 xchg %ax,%ax
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00000240 <atoi>:
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int atoi(const char *s) {
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240: 55 push %ebp
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241: 89 e5 mov %esp,%ebp
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243: 53 push %ebx
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244: 8b 55 08 mov 0x8(%ebp),%edx
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int n;
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n = 0;
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while ('0' <= *s && *s <= '9') {
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247: 0f be 02 movsbl (%edx),%eax
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24a: 8d 48 d0 lea -0x30(%eax),%ecx
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24d: 80 f9 09 cmp $0x9,%cl
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n = 0;
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250: b9 00 00 00 00 mov $0x0,%ecx
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while ('0' <= *s && *s <= '9') {
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255: 77 1e ja 275 <atoi+0x35>
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257: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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25e: 66 90 xchg %ax,%ax
|
|
n = n * 10 + *s++ - '0';
|
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260: 83 c2 01 add $0x1,%edx
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263: 8d 0c 89 lea (%ecx,%ecx,4),%ecx
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266: 8d 4c 48 d0 lea -0x30(%eax,%ecx,2),%ecx
|
|
while ('0' <= *s && *s <= '9') {
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26a: 0f be 02 movsbl (%edx),%eax
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26d: 8d 58 d0 lea -0x30(%eax),%ebx
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270: 80 fb 09 cmp $0x9,%bl
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273: 76 eb jbe 260 <atoi+0x20>
|
|
}
|
|
return n;
|
|
}
|
|
275: 8b 5d fc mov -0x4(%ebp),%ebx
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|
278: 89 c8 mov %ecx,%eax
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|
27a: c9 leave
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|
27b: c3 ret
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27c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
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|
|
|
00000280 <memmove>:
|
|
|
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void* memmove(void *vdst, const void *vsrc, int n) {
|
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280: 55 push %ebp
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281: 89 e5 mov %esp,%ebp
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283: 57 push %edi
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284: 8b 45 10 mov 0x10(%ebp),%eax
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287: 8b 55 08 mov 0x8(%ebp),%edx
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28a: 56 push %esi
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|
28b: 8b 75 0c mov 0xc(%ebp),%esi
|
|
char *dst;
|
|
const char *src;
|
|
|
|
dst = vdst;
|
|
src = vsrc;
|
|
while (n-- > 0) {
|
|
28e: 85 c0 test %eax,%eax
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|
290: 7e 13 jle 2a5 <memmove+0x25>
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|
292: 01 d0 add %edx,%eax
|
|
dst = vdst;
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294: 89 d7 mov %edx,%edi
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296: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
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29d: 8d 76 00 lea 0x0(%esi),%esi
|
|
*dst++ = *src++;
|
|
2a0: a4 movsb %ds:(%esi),%es:(%edi)
|
|
while (n-- > 0) {
|
|
2a1: 39 f8 cmp %edi,%eax
|
|
2a3: 75 fb jne 2a0 <memmove+0x20>
|
|
}
|
|
return vdst;
|
|
}
|
|
2a5: 5e pop %esi
|
|
2a6: 89 d0 mov %edx,%eax
|
|
2a8: 5f pop %edi
|
|
2a9: 5d pop %ebp
|
|
2aa: c3 ret
|
|
|
|
000002ab <fork>:
|
|
name: \
|
|
movl $SYS_ ## name, %eax; \
|
|
int $T_SYSCALL; \
|
|
ret
|
|
|
|
SYSCALL(fork)
|
|
2ab: b8 01 00 00 00 mov $0x1,%eax
|
|
2b0: cd 40 int $0x40
|
|
2b2: c3 ret
|
|
|
|
000002b3 <exit>:
|
|
SYSCALL(exit)
|
|
2b3: b8 02 00 00 00 mov $0x2,%eax
|
|
2b8: cd 40 int $0x40
|
|
2ba: c3 ret
|
|
|
|
000002bb <wait>:
|
|
SYSCALL(wait)
|
|
2bb: b8 03 00 00 00 mov $0x3,%eax
|
|
2c0: cd 40 int $0x40
|
|
2c2: c3 ret
|
|
|
|
000002c3 <pipe>:
|
|
SYSCALL(pipe)
|
|
2c3: b8 04 00 00 00 mov $0x4,%eax
|
|
2c8: cd 40 int $0x40
|
|
2ca: c3 ret
|
|
|
|
000002cb <read>:
|
|
SYSCALL(read)
|
|
2cb: b8 05 00 00 00 mov $0x5,%eax
|
|
2d0: cd 40 int $0x40
|
|
2d2: c3 ret
|
|
|
|
000002d3 <kill>:
|
|
SYSCALL(kill)
|
|
2d3: b8 06 00 00 00 mov $0x6,%eax
|
|
2d8: cd 40 int $0x40
|
|
2da: c3 ret
|
|
|
|
000002db <exec>:
|
|
SYSCALL(exec)
|
|
2db: b8 07 00 00 00 mov $0x7,%eax
|
|
2e0: cd 40 int $0x40
|
|
2e2: c3 ret
|
|
|
|
000002e3 <fstat>:
|
|
SYSCALL(fstat)
|
|
2e3: b8 08 00 00 00 mov $0x8,%eax
|
|
2e8: cd 40 int $0x40
|
|
2ea: c3 ret
|
|
|
|
000002eb <chdir>:
|
|
SYSCALL(chdir)
|
|
2eb: b8 09 00 00 00 mov $0x9,%eax
|
|
2f0: cd 40 int $0x40
|
|
2f2: c3 ret
|
|
|
|
000002f3 <dup>:
|
|
SYSCALL(dup)
|
|
2f3: b8 0a 00 00 00 mov $0xa,%eax
|
|
2f8: cd 40 int $0x40
|
|
2fa: c3 ret
|
|
|
|
000002fb <getpid>:
|
|
SYSCALL(getpid)
|
|
2fb: b8 0b 00 00 00 mov $0xb,%eax
|
|
300: cd 40 int $0x40
|
|
302: c3 ret
|
|
|
|
00000303 <sbrk>:
|
|
SYSCALL(sbrk)
|
|
303: b8 0c 00 00 00 mov $0xc,%eax
|
|
308: cd 40 int $0x40
|
|
30a: c3 ret
|
|
|
|
0000030b <sleep>:
|
|
SYSCALL(sleep)
|
|
30b: b8 0d 00 00 00 mov $0xd,%eax
|
|
310: cd 40 int $0x40
|
|
312: c3 ret
|
|
|
|
00000313 <uptime>:
|
|
SYSCALL(uptime)
|
|
313: b8 0e 00 00 00 mov $0xe,%eax
|
|
318: cd 40 int $0x40
|
|
31a: c3 ret
|
|
|
|
0000031b <open>:
|
|
SYSCALL(open)
|
|
31b: b8 0f 00 00 00 mov $0xf,%eax
|
|
320: cd 40 int $0x40
|
|
322: c3 ret
|
|
|
|
00000323 <write>:
|
|
SYSCALL(write)
|
|
323: b8 10 00 00 00 mov $0x10,%eax
|
|
328: cd 40 int $0x40
|
|
32a: c3 ret
|
|
|
|
0000032b <mknod>:
|
|
SYSCALL(mknod)
|
|
32b: b8 11 00 00 00 mov $0x11,%eax
|
|
330: cd 40 int $0x40
|
|
332: c3 ret
|
|
|
|
00000333 <unlink>:
|
|
SYSCALL(unlink)
|
|
333: b8 12 00 00 00 mov $0x12,%eax
|
|
338: cd 40 int $0x40
|
|
33a: c3 ret
|
|
|
|
0000033b <link>:
|
|
SYSCALL(link)
|
|
33b: b8 13 00 00 00 mov $0x13,%eax
|
|
340: cd 40 int $0x40
|
|
342: c3 ret
|
|
|
|
00000343 <mkdir>:
|
|
SYSCALL(mkdir)
|
|
343: b8 14 00 00 00 mov $0x14,%eax
|
|
348: cd 40 int $0x40
|
|
34a: c3 ret
|
|
|
|
0000034b <close>:
|
|
SYSCALL(close)
|
|
34b: b8 15 00 00 00 mov $0x15,%eax
|
|
350: cd 40 int $0x40
|
|
352: c3 ret
|
|
|
|
00000353 <getch>:
|
|
SYSCALL(getch)
|
|
353: b8 16 00 00 00 mov $0x16,%eax
|
|
358: cd 40 int $0x40
|
|
35a: c3 ret
|
|
|
|
0000035b <greeting>:
|
|
SYSCALL(greeting)
|
|
35b: b8 17 00 00 00 mov $0x17,%eax
|
|
360: cd 40 int $0x40
|
|
362: c3 ret
|
|
|
|
00000363 <shutdown>:
|
|
SYSCALL(shutdown)
|
|
363: b8 18 00 00 00 mov $0x18,%eax
|
|
368: cd 40 int $0x40
|
|
36a: c3 ret
|
|
|
|
0000036b <screen>:
|
|
SYSCALL(screen)
|
|
36b: b8 19 00 00 00 mov $0x19,%eax
|
|
370: cd 40 int $0x40
|
|
372: c3 ret
|
|
|
|
00000373 <cls>:
|
|
SYSCALL(cls)
|
|
373: b8 1a 00 00 00 mov $0x1a,%eax
|
|
378: cd 40 int $0x40
|
|
37a: c3 ret
|
|
37b: 66 90 xchg %ax,%ax
|
|
37d: 66 90 xchg %ax,%ax
|
|
37f: 90 nop
|
|
|
|
00000380 <printint>:
|
|
|
|
static void putc(int fd, char c) {
|
|
write(fd, &c, 1);
|
|
}
|
|
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
380: 55 push %ebp
|
|
381: 89 e5 mov %esp,%ebp
|
|
383: 57 push %edi
|
|
384: 56 push %esi
|
|
385: 53 push %ebx
|
|
386: 83 ec 3c sub $0x3c,%esp
|
|
389: 89 4d c4 mov %ecx,-0x3c(%ebp)
|
|
uint x;
|
|
|
|
neg = 0;
|
|
if (sgn && xx < 0) {
|
|
neg = 1;
|
|
x = -xx;
|
|
38c: 89 d1 mov %edx,%ecx
|
|
static void printint(int fd, int xx, int base, int sgn) {
|
|
38e: 89 45 b8 mov %eax,-0x48(%ebp)
|
|
if (sgn && xx < 0) {
|
|
391: 85 d2 test %edx,%edx
|
|
393: 0f 89 7f 00 00 00 jns 418 <printint+0x98>
|
|
399: f6 45 08 01 testb $0x1,0x8(%ebp)
|
|
39d: 74 79 je 418 <printint+0x98>
|
|
neg = 1;
|
|
39f: c7 45 bc 01 00 00 00 movl $0x1,-0x44(%ebp)
|
|
x = -xx;
|
|
3a6: f7 d9 neg %ecx
|
|
}
|
|
else {
|
|
x = xx;
|
|
}
|
|
|
|
i = 0;
|
|
3a8: 31 db xor %ebx,%ebx
|
|
3aa: 8d 75 d7 lea -0x29(%ebp),%esi
|
|
3ad: 8d 76 00 lea 0x0(%esi),%esi
|
|
do {
|
|
buf[i++] = digits[x % base];
|
|
3b0: 89 c8 mov %ecx,%eax
|
|
3b2: 31 d2 xor %edx,%edx
|
|
3b4: 89 cf mov %ecx,%edi
|
|
3b6: f7 75 c4 divl -0x3c(%ebp)
|
|
3b9: 0f b6 92 e0 07 00 00 movzbl 0x7e0(%edx),%edx
|
|
3c0: 89 45 c0 mov %eax,-0x40(%ebp)
|
|
3c3: 89 d8 mov %ebx,%eax
|
|
3c5: 8d 5b 01 lea 0x1(%ebx),%ebx
|
|
}
|
|
while ((x /= base) != 0);
|
|
3c8: 8b 4d c0 mov -0x40(%ebp),%ecx
|
|
buf[i++] = digits[x % base];
|
|
3cb: 88 14 1e mov %dl,(%esi,%ebx,1)
|
|
while ((x /= base) != 0);
|
|
3ce: 39 7d c4 cmp %edi,-0x3c(%ebp)
|
|
3d1: 76 dd jbe 3b0 <printint+0x30>
|
|
if (neg) {
|
|
3d3: 8b 4d bc mov -0x44(%ebp),%ecx
|
|
3d6: 85 c9 test %ecx,%ecx
|
|
3d8: 74 0c je 3e6 <printint+0x66>
|
|
buf[i++] = '-';
|
|
3da: c6 44 1d d8 2d movb $0x2d,-0x28(%ebp,%ebx,1)
|
|
buf[i++] = digits[x % base];
|
|
3df: 89 d8 mov %ebx,%eax
|
|
buf[i++] = '-';
|
|
3e1: ba 2d 00 00 00 mov $0x2d,%edx
|
|
}
|
|
|
|
while (--i >= 0) {
|
|
3e6: 8b 7d b8 mov -0x48(%ebp),%edi
|
|
3e9: 8d 5c 05 d7 lea -0x29(%ebp,%eax,1),%ebx
|
|
3ed: eb 07 jmp 3f6 <printint+0x76>
|
|
3ef: 90 nop
|
|
putc(fd, buf[i]);
|
|
3f0: 0f b6 13 movzbl (%ebx),%edx
|
|
3f3: 83 eb 01 sub $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
3f6: 83 ec 04 sub $0x4,%esp
|
|
3f9: 88 55 d7 mov %dl,-0x29(%ebp)
|
|
3fc: 6a 01 push $0x1
|
|
3fe: 56 push %esi
|
|
3ff: 57 push %edi
|
|
400: e8 1e ff ff ff call 323 <write>
|
|
while (--i >= 0) {
|
|
405: 83 c4 10 add $0x10,%esp
|
|
408: 39 de cmp %ebx,%esi
|
|
40a: 75 e4 jne 3f0 <printint+0x70>
|
|
}
|
|
}
|
|
40c: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
40f: 5b pop %ebx
|
|
410: 5e pop %esi
|
|
411: 5f pop %edi
|
|
412: 5d pop %ebp
|
|
413: c3 ret
|
|
414: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
neg = 0;
|
|
418: c7 45 bc 00 00 00 00 movl $0x0,-0x44(%ebp)
|
|
41f: eb 87 jmp 3a8 <printint+0x28>
|
|
421: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
428: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
42f: 90 nop
|
|
|
|
00000430 <printf>:
|
|
|
|
// Print to the given fd. Only understands %d, %x, %p, %s.
|
|
void printf(int fd, const char *fmt, ...) {
|
|
430: 55 push %ebp
|
|
431: 89 e5 mov %esp,%ebp
|
|
433: 57 push %edi
|
|
434: 56 push %esi
|
|
435: 53 push %ebx
|
|
436: 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++) {
|
|
439: 8b 5d 0c mov 0xc(%ebp),%ebx
|
|
void printf(int fd, const char *fmt, ...) {
|
|
43c: 8b 75 08 mov 0x8(%ebp),%esi
|
|
for (i = 0; fmt[i]; i++) {
|
|
43f: 0f b6 13 movzbl (%ebx),%edx
|
|
442: 84 d2 test %dl,%dl
|
|
444: 74 6a je 4b0 <printf+0x80>
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
446: 8d 45 10 lea 0x10(%ebp),%eax
|
|
449: 83 c3 01 add $0x1,%ebx
|
|
write(fd, &c, 1);
|
|
44c: 8d 7d e7 lea -0x19(%ebp),%edi
|
|
state = 0;
|
|
44f: 31 c9 xor %ecx,%ecx
|
|
ap = (uint*)(void*)&fmt + 1;
|
|
451: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
454: eb 36 jmp 48c <printf+0x5c>
|
|
456: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
45d: 8d 76 00 lea 0x0(%esi),%esi
|
|
460: 89 4d d4 mov %ecx,-0x2c(%ebp)
|
|
c = fmt[i] & 0xff;
|
|
if (state == 0) {
|
|
if (c == '%') {
|
|
state = '%';
|
|
463: b9 25 00 00 00 mov $0x25,%ecx
|
|
if (c == '%') {
|
|
468: 83 f8 25 cmp $0x25,%eax
|
|
46b: 74 15 je 482 <printf+0x52>
|
|
write(fd, &c, 1);
|
|
46d: 83 ec 04 sub $0x4,%esp
|
|
470: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
473: 6a 01 push $0x1
|
|
475: 57 push %edi
|
|
476: 56 push %esi
|
|
477: e8 a7 fe ff ff call 323 <write>
|
|
47c: 8b 4d d4 mov -0x2c(%ebp),%ecx
|
|
}
|
|
else {
|
|
putc(fd, c);
|
|
47f: 83 c4 10 add $0x10,%esp
|
|
for (i = 0; fmt[i]; i++) {
|
|
482: 0f b6 13 movzbl (%ebx),%edx
|
|
485: 83 c3 01 add $0x1,%ebx
|
|
488: 84 d2 test %dl,%dl
|
|
48a: 74 24 je 4b0 <printf+0x80>
|
|
c = fmt[i] & 0xff;
|
|
48c: 0f b6 c2 movzbl %dl,%eax
|
|
if (state == 0) {
|
|
48f: 85 c9 test %ecx,%ecx
|
|
491: 74 cd je 460 <printf+0x30>
|
|
}
|
|
}
|
|
else if (state == '%') {
|
|
493: 83 f9 25 cmp $0x25,%ecx
|
|
496: 75 ea jne 482 <printf+0x52>
|
|
if (c == 'd') {
|
|
498: 83 f8 25 cmp $0x25,%eax
|
|
49b: 0f 84 07 01 00 00 je 5a8 <printf+0x178>
|
|
4a1: 83 e8 63 sub $0x63,%eax
|
|
4a4: 83 f8 15 cmp $0x15,%eax
|
|
4a7: 77 17 ja 4c0 <printf+0x90>
|
|
4a9: ff 24 85 88 07 00 00 jmp *0x788(,%eax,4)
|
|
putc(fd, c);
|
|
}
|
|
state = 0;
|
|
}
|
|
}
|
|
}
|
|
4b0: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
4b3: 5b pop %ebx
|
|
4b4: 5e pop %esi
|
|
4b5: 5f pop %edi
|
|
4b6: 5d pop %ebp
|
|
4b7: c3 ret
|
|
4b8: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
4bf: 90 nop
|
|
write(fd, &c, 1);
|
|
4c0: 83 ec 04 sub $0x4,%esp
|
|
4c3: 88 55 d4 mov %dl,-0x2c(%ebp)
|
|
4c6: 6a 01 push $0x1
|
|
4c8: 57 push %edi
|
|
4c9: 56 push %esi
|
|
4ca: c6 45 e7 25 movb $0x25,-0x19(%ebp)
|
|
4ce: e8 50 fe ff ff call 323 <write>
|
|
putc(fd, c);
|
|
4d3: 0f b6 55 d4 movzbl -0x2c(%ebp),%edx
|
|
write(fd, &c, 1);
|
|
4d7: 83 c4 0c add $0xc,%esp
|
|
4da: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
4dd: 6a 01 push $0x1
|
|
4df: 57 push %edi
|
|
4e0: 56 push %esi
|
|
4e1: e8 3d fe ff ff call 323 <write>
|
|
putc(fd, c);
|
|
4e6: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
4e9: 31 c9 xor %ecx,%ecx
|
|
4eb: eb 95 jmp 482 <printf+0x52>
|
|
4ed: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 16, 0);
|
|
4f0: 83 ec 0c sub $0xc,%esp
|
|
4f3: b9 10 00 00 00 mov $0x10,%ecx
|
|
4f8: 6a 00 push $0x0
|
|
4fa: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
4fd: 8b 10 mov (%eax),%edx
|
|
4ff: 89 f0 mov %esi,%eax
|
|
501: e8 7a fe ff ff call 380 <printint>
|
|
ap++;
|
|
506: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
50a: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
50d: 31 c9 xor %ecx,%ecx
|
|
50f: e9 6e ff ff ff jmp 482 <printf+0x52>
|
|
514: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
s = (char*)*ap;
|
|
518: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
51b: 8b 10 mov (%eax),%edx
|
|
ap++;
|
|
51d: 83 c0 04 add $0x4,%eax
|
|
520: 89 45 d0 mov %eax,-0x30(%ebp)
|
|
if (s == 0) {
|
|
523: 85 d2 test %edx,%edx
|
|
525: 0f 84 8d 00 00 00 je 5b8 <printf+0x188>
|
|
while (*s != 0) {
|
|
52b: 0f b6 02 movzbl (%edx),%eax
|
|
state = 0;
|
|
52e: 31 c9 xor %ecx,%ecx
|
|
while (*s != 0) {
|
|
530: 84 c0 test %al,%al
|
|
532: 0f 84 4a ff ff ff je 482 <printf+0x52>
|
|
538: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
53b: 89 d3 mov %edx,%ebx
|
|
53d: 8d 76 00 lea 0x0(%esi),%esi
|
|
write(fd, &c, 1);
|
|
540: 83 ec 04 sub $0x4,%esp
|
|
s++;
|
|
543: 83 c3 01 add $0x1,%ebx
|
|
546: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
549: 6a 01 push $0x1
|
|
54b: 57 push %edi
|
|
54c: 56 push %esi
|
|
54d: e8 d1 fd ff ff call 323 <write>
|
|
while (*s != 0) {
|
|
552: 0f b6 03 movzbl (%ebx),%eax
|
|
555: 83 c4 10 add $0x10,%esp
|
|
558: 84 c0 test %al,%al
|
|
55a: 75 e4 jne 540 <printf+0x110>
|
|
state = 0;
|
|
55c: 8b 5d d4 mov -0x2c(%ebp),%ebx
|
|
55f: 31 c9 xor %ecx,%ecx
|
|
561: e9 1c ff ff ff jmp 482 <printf+0x52>
|
|
566: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
56d: 8d 76 00 lea 0x0(%esi),%esi
|
|
printint(fd, *ap, 10, 1);
|
|
570: 83 ec 0c sub $0xc,%esp
|
|
573: b9 0a 00 00 00 mov $0xa,%ecx
|
|
578: 6a 01 push $0x1
|
|
57a: e9 7b ff ff ff jmp 4fa <printf+0xca>
|
|
57f: 90 nop
|
|
putc(fd, *ap);
|
|
580: 8b 45 d0 mov -0x30(%ebp),%eax
|
|
write(fd, &c, 1);
|
|
583: 83 ec 04 sub $0x4,%esp
|
|
putc(fd, *ap);
|
|
586: 8b 00 mov (%eax),%eax
|
|
write(fd, &c, 1);
|
|
588: 6a 01 push $0x1
|
|
58a: 57 push %edi
|
|
58b: 56 push %esi
|
|
putc(fd, *ap);
|
|
58c: 88 45 e7 mov %al,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
58f: e8 8f fd ff ff call 323 <write>
|
|
ap++;
|
|
594: 83 45 d0 04 addl $0x4,-0x30(%ebp)
|
|
598: 83 c4 10 add $0x10,%esp
|
|
state = 0;
|
|
59b: 31 c9 xor %ecx,%ecx
|
|
59d: e9 e0 fe ff ff jmp 482 <printf+0x52>
|
|
5a2: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
putc(fd, c);
|
|
5a8: 88 55 e7 mov %dl,-0x19(%ebp)
|
|
write(fd, &c, 1);
|
|
5ab: 83 ec 04 sub $0x4,%esp
|
|
5ae: e9 2a ff ff ff jmp 4dd <printf+0xad>
|
|
5b3: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
5b7: 90 nop
|
|
s = "(null)";
|
|
5b8: ba 7f 07 00 00 mov $0x77f,%edx
|
|
while (*s != 0) {
|
|
5bd: 89 5d d4 mov %ebx,-0x2c(%ebp)
|
|
5c0: b8 28 00 00 00 mov $0x28,%eax
|
|
5c5: 89 d3 mov %edx,%ebx
|
|
5c7: e9 74 ff ff ff jmp 540 <printf+0x110>
|
|
5cc: 66 90 xchg %ax,%ax
|
|
5ce: 66 90 xchg %ax,%ax
|
|
|
|
000005d0 <free>:
|
|
typedef union header Header;
|
|
|
|
static Header base;
|
|
static Header *freep;
|
|
|
|
void free(void *ap) {
|
|
5d0: 55 push %ebp
|
|
Header *bp, *p;
|
|
|
|
bp = (Header*)ap - 1;
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
5d1: a1 8c 0a 00 00 mov 0xa8c,%eax
|
|
void free(void *ap) {
|
|
5d6: 89 e5 mov %esp,%ebp
|
|
5d8: 57 push %edi
|
|
5d9: 56 push %esi
|
|
5da: 53 push %ebx
|
|
5db: 8b 5d 08 mov 0x8(%ebp),%ebx
|
|
bp = (Header*)ap - 1;
|
|
5de: 8d 4b f8 lea -0x8(%ebx),%ecx
|
|
for (p = freep; !(bp > p && bp < p->s.ptr); p = p->s.ptr) {
|
|
5e1: 8d b4 26 00 00 00 00 lea 0x0(%esi,%eiz,1),%esi
|
|
5e8: 89 c2 mov %eax,%edx
|
|
5ea: 8b 00 mov (%eax),%eax
|
|
5ec: 39 ca cmp %ecx,%edx
|
|
5ee: 73 30 jae 620 <free+0x50>
|
|
5f0: 39 c1 cmp %eax,%ecx
|
|
5f2: 72 04 jb 5f8 <free+0x28>
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
5f4: 39 c2 cmp %eax,%edx
|
|
5f6: 72 f0 jb 5e8 <free+0x18>
|
|
break;
|
|
}
|
|
}
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
5f8: 8b 73 fc mov -0x4(%ebx),%esi
|
|
5fb: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
5fe: 39 f8 cmp %edi,%eax
|
|
600: 74 30 je 632 <free+0x62>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
602: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
}
|
|
else {
|
|
bp->s.ptr = p->s.ptr;
|
|
}
|
|
if (p + p->s.size == bp) {
|
|
605: 8b 42 04 mov 0x4(%edx),%eax
|
|
608: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
60b: 39 f1 cmp %esi,%ecx
|
|
60d: 74 3a je 649 <free+0x79>
|
|
p->s.size += bp->s.size;
|
|
p->s.ptr = bp->s.ptr;
|
|
60f: 89 0a mov %ecx,(%edx)
|
|
}
|
|
else {
|
|
p->s.ptr = bp;
|
|
}
|
|
freep = p;
|
|
}
|
|
611: 5b pop %ebx
|
|
freep = p;
|
|
612: 89 15 8c 0a 00 00 mov %edx,0xa8c
|
|
}
|
|
618: 5e pop %esi
|
|
619: 5f pop %edi
|
|
61a: 5d pop %ebp
|
|
61b: c3 ret
|
|
61c: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
|
|
if (p >= p->s.ptr && (bp > p || bp < p->s.ptr)) {
|
|
620: 39 c2 cmp %eax,%edx
|
|
622: 72 c4 jb 5e8 <free+0x18>
|
|
624: 39 c1 cmp %eax,%ecx
|
|
626: 73 c0 jae 5e8 <free+0x18>
|
|
if (bp + bp->s.size == p->s.ptr) {
|
|
628: 8b 73 fc mov -0x4(%ebx),%esi
|
|
62b: 8d 3c f1 lea (%ecx,%esi,8),%edi
|
|
62e: 39 f8 cmp %edi,%eax
|
|
630: 75 d0 jne 602 <free+0x32>
|
|
bp->s.size += p->s.ptr->s.size;
|
|
632: 03 70 04 add 0x4(%eax),%esi
|
|
635: 89 73 fc mov %esi,-0x4(%ebx)
|
|
bp->s.ptr = p->s.ptr->s.ptr;
|
|
638: 8b 02 mov (%edx),%eax
|
|
63a: 8b 00 mov (%eax),%eax
|
|
63c: 89 43 f8 mov %eax,-0x8(%ebx)
|
|
if (p + p->s.size == bp) {
|
|
63f: 8b 42 04 mov 0x4(%edx),%eax
|
|
642: 8d 34 c2 lea (%edx,%eax,8),%esi
|
|
645: 39 f1 cmp %esi,%ecx
|
|
647: 75 c6 jne 60f <free+0x3f>
|
|
p->s.size += bp->s.size;
|
|
649: 03 43 fc add -0x4(%ebx),%eax
|
|
freep = p;
|
|
64c: 89 15 8c 0a 00 00 mov %edx,0xa8c
|
|
p->s.size += bp->s.size;
|
|
652: 89 42 04 mov %eax,0x4(%edx)
|
|
p->s.ptr = bp->s.ptr;
|
|
655: 8b 4b f8 mov -0x8(%ebx),%ecx
|
|
658: 89 0a mov %ecx,(%edx)
|
|
}
|
|
65a: 5b pop %ebx
|
|
65b: 5e pop %esi
|
|
65c: 5f pop %edi
|
|
65d: 5d pop %ebp
|
|
65e: c3 ret
|
|
65f: 90 nop
|
|
|
|
00000660 <malloc>:
|
|
hp->s.size = nu;
|
|
free((void*)(hp + 1));
|
|
return freep;
|
|
}
|
|
|
|
void* malloc(uint nbytes) {
|
|
660: 55 push %ebp
|
|
661: 89 e5 mov %esp,%ebp
|
|
663: 57 push %edi
|
|
664: 56 push %esi
|
|
665: 53 push %ebx
|
|
666: 83 ec 1c sub $0x1c,%esp
|
|
Header *p, *prevp;
|
|
uint nunits;
|
|
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
669: 8b 45 08 mov 0x8(%ebp),%eax
|
|
if ((prevp = freep) == 0) {
|
|
66c: 8b 3d 8c 0a 00 00 mov 0xa8c,%edi
|
|
nunits = (nbytes + sizeof(Header) - 1) / sizeof(Header) + 1;
|
|
672: 8d 70 07 lea 0x7(%eax),%esi
|
|
675: c1 ee 03 shr $0x3,%esi
|
|
678: 83 c6 01 add $0x1,%esi
|
|
if ((prevp = freep) == 0) {
|
|
67b: 85 ff test %edi,%edi
|
|
67d: 0f 84 9d 00 00 00 je 720 <malloc+0xc0>
|
|
base.s.ptr = freep = prevp = &base;
|
|
base.s.size = 0;
|
|
}
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
683: 8b 17 mov (%edi),%edx
|
|
if (p->s.size >= nunits) {
|
|
685: 8b 4a 04 mov 0x4(%edx),%ecx
|
|
688: 39 f1 cmp %esi,%ecx
|
|
68a: 73 6a jae 6f6 <malloc+0x96>
|
|
68c: bb 00 10 00 00 mov $0x1000,%ebx
|
|
691: 39 de cmp %ebx,%esi
|
|
693: 0f 43 de cmovae %esi,%ebx
|
|
p = sbrk(nu * sizeof(Header));
|
|
696: 8d 04 dd 00 00 00 00 lea 0x0(,%ebx,8),%eax
|
|
69d: 89 45 e4 mov %eax,-0x1c(%ebp)
|
|
6a0: eb 17 jmp 6b9 <malloc+0x59>
|
|
6a2: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
6a8: 8b 02 mov (%edx),%eax
|
|
if (p->s.size >= nunits) {
|
|
6aa: 8b 48 04 mov 0x4(%eax),%ecx
|
|
6ad: 39 f1 cmp %esi,%ecx
|
|
6af: 73 4f jae 700 <malloc+0xa0>
|
|
p->s.size = nunits;
|
|
}
|
|
freep = prevp;
|
|
return (void*)(p + 1);
|
|
}
|
|
if (p == freep) {
|
|
6b1: 8b 3d 8c 0a 00 00 mov 0xa8c,%edi
|
|
6b7: 89 c2 mov %eax,%edx
|
|
6b9: 39 d7 cmp %edx,%edi
|
|
6bb: 75 eb jne 6a8 <malloc+0x48>
|
|
p = sbrk(nu * sizeof(Header));
|
|
6bd: 83 ec 0c sub $0xc,%esp
|
|
6c0: ff 75 e4 push -0x1c(%ebp)
|
|
6c3: e8 3b fc ff ff call 303 <sbrk>
|
|
if (p == (char*)-1) {
|
|
6c8: 83 c4 10 add $0x10,%esp
|
|
6cb: 83 f8 ff cmp $0xffffffff,%eax
|
|
6ce: 74 1c je 6ec <malloc+0x8c>
|
|
hp->s.size = nu;
|
|
6d0: 89 58 04 mov %ebx,0x4(%eax)
|
|
free((void*)(hp + 1));
|
|
6d3: 83 ec 0c sub $0xc,%esp
|
|
6d6: 83 c0 08 add $0x8,%eax
|
|
6d9: 50 push %eax
|
|
6da: e8 f1 fe ff ff call 5d0 <free>
|
|
return freep;
|
|
6df: 8b 15 8c 0a 00 00 mov 0xa8c,%edx
|
|
if ((p = morecore(nunits)) == 0) {
|
|
6e5: 83 c4 10 add $0x10,%esp
|
|
6e8: 85 d2 test %edx,%edx
|
|
6ea: 75 bc jne 6a8 <malloc+0x48>
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
6ec: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return 0;
|
|
6ef: 31 c0 xor %eax,%eax
|
|
}
|
|
6f1: 5b pop %ebx
|
|
6f2: 5e pop %esi
|
|
6f3: 5f pop %edi
|
|
6f4: 5d pop %ebp
|
|
6f5: c3 ret
|
|
if (p->s.size >= nunits) {
|
|
6f6: 89 d0 mov %edx,%eax
|
|
6f8: 89 fa mov %edi,%edx
|
|
6fa: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
if (p->s.size == nunits) {
|
|
700: 39 ce cmp %ecx,%esi
|
|
702: 74 4c je 750 <malloc+0xf0>
|
|
p->s.size -= nunits;
|
|
704: 29 f1 sub %esi,%ecx
|
|
706: 89 48 04 mov %ecx,0x4(%eax)
|
|
p += p->s.size;
|
|
709: 8d 04 c8 lea (%eax,%ecx,8),%eax
|
|
p->s.size = nunits;
|
|
70c: 89 70 04 mov %esi,0x4(%eax)
|
|
freep = prevp;
|
|
70f: 89 15 8c 0a 00 00 mov %edx,0xa8c
|
|
}
|
|
715: 8d 65 f4 lea -0xc(%ebp),%esp
|
|
return (void*)(p + 1);
|
|
718: 83 c0 08 add $0x8,%eax
|
|
}
|
|
71b: 5b pop %ebx
|
|
71c: 5e pop %esi
|
|
71d: 5f pop %edi
|
|
71e: 5d pop %ebp
|
|
71f: c3 ret
|
|
base.s.ptr = freep = prevp = &base;
|
|
720: c7 05 8c 0a 00 00 90 movl $0xa90,0xa8c
|
|
727: 0a 00 00
|
|
base.s.size = 0;
|
|
72a: bf 90 0a 00 00 mov $0xa90,%edi
|
|
base.s.ptr = freep = prevp = &base;
|
|
72f: c7 05 90 0a 00 00 90 movl $0xa90,0xa90
|
|
736: 0a 00 00
|
|
for (p = prevp->s.ptr;; prevp = p, p = p->s.ptr) {
|
|
739: 89 fa mov %edi,%edx
|
|
base.s.size = 0;
|
|
73b: c7 05 94 0a 00 00 00 movl $0x0,0xa94
|
|
742: 00 00 00
|
|
if (p->s.size >= nunits) {
|
|
745: e9 42 ff ff ff jmp 68c <malloc+0x2c>
|
|
74a: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
|
|
prevp->s.ptr = p->s.ptr;
|
|
750: 8b 08 mov (%eax),%ecx
|
|
752: 89 0a mov %ecx,(%edx)
|
|
754: eb b9 jmp 70f <malloc+0xaf>
|