这是我的objdump -d输出，但我不知道在哪里看。我了解汇编，但试图找出某些点的寄存器值有点令人困惑。如果有人知道如何在 IDA 中做到这一点，我有 IDA 5.0 的免费版本。
root@kali:~/Desktop# objdump -d dbgLab.bin
dbgLab.bin: file format elf32-i386
Disassembly of section .init:
08048374 <.init>:
8048374: 53 push %ebx
8048375: 83 ec 08 sub $0x8,%esp
8048378: e8 00 00 00 00 call 804837d <printf@plt-0x43>
804837d: 5b pop %ebx
804837e: 81 c3 77 1c 00 00 add $0x1c77,%ebx
8048384: 8b 83 fc ff ff ff mov -0x4(%ebx),%eax
804838a: 85 c0 test %eax,%eax
804838c: 74 05 je 8048393 <printf@plt-0x2d>
804838e: e8 5d 00 00 00 call 80483f0 <__gmon_start__@plt>
8048393: e8 48 01 00 00 call 80484e0 <strncmp@plt+0xa0>
8048398: e8 13 03 00 00 call 80486b0 <strncmp@plt+0x270>
804839d: 83 c4 08 add $0x8,%esp
80483a0: 5b pop %ebx
80483a1: c3 ret
Disassembly of section .plt:
080483b0 <printf@plt-0x10>:
80483b0: ff 35 f8 9f 04 08 pushl 0x8049ff8
80483b6: ff 25 fc 9f 04 08 jmp *0x8049ffc
80483bc: 00 00 add %al,(%eax)
...
080483c0 <printf@plt>:
80483c0: ff 25 00 a0 04 08 jmp *0x804a000
80483c6: 68 00 00 00 00 push $0x0
80483cb: e9 e0 ff ff ff jmp 80483b0 <printf@plt-0x10>
080483d0 <malloc@plt>:
80483d0: ff 25 04 a0 04 08 jmp *0x804a004
80483d6: 68 08 00 00 00 push $0x8
80483db: e9 d0 ff ff ff jmp 80483b0 <printf@plt-0x10>
080483e0 <puts@plt>:
80483e0: ff 25 08 a0 04 08 jmp *0x804a008
80483e6: 68 10 00 00 00 push $0x10
80483eb: e9 c0 ff ff ff jmp 80483b0 <printf@plt-0x10>
080483f0 <__gmon_start__@plt>:
80483f0: ff 25 0c a0 04 08 jmp *0x804a00c
80483f6: 68 18 00 00 00 push $0x18
80483fb: e9 b0 ff ff ff jmp 80483b0 <printf@plt-0x10>
08048400 <exit@plt>:
8048400: ff 25 10 a0 04 08 jmp *0x804a010
8048406: 68 20 00 00 00 push $0x20
804840b: e9 a0 ff ff ff jmp 80483b0 <printf@plt-0x10>
08048410 <__libc_start_main@plt>:
8048410: ff 25 14 a0 04 08 jmp *0x804a014
8048416: 68 28 00 00 00 push $0x28
804841b: e9 90 ff ff ff jmp 80483b0 <printf@plt-0x10>
08048420 <strncpy@plt>:
8048420: ff 25 18 a0 04 08 jmp *0x804a018
8048426: 68 30 00 00 00 push $0x30
804842b: e9 80 ff ff ff jmp 80483b0 <printf@plt-0x10>
08048430 <atoi@plt>:
8048430: ff 25 1c a0 04 08 jmp *0x804a01c
8048436: 68 38 00 00 00 push $0x38
804843b: e9 70 ff ff ff jmp 80483b0 <printf@plt-0x10>
08048440 <strncmp@plt>:
8048440: ff 25 20 a0 04 08 jmp *0x804a020
8048446: 68 40 00 00 00 push $0x40
804844b: e9 60 ff ff ff jmp 80483b0 <printf@plt-0x10>
Disassembly of section .text:
08048450 <.text>:
8048450: 31 ed xor %ebp,%ebp
8048452: 5e pop %esi
8048453: 89 e1 mov %esp,%ecx
8048455: 83 e4 f0 and $0xfffffff0,%esp
8048458: 50 push %eax
8048459: 54 push %esp
804845a: 52 push %edx
804845b: 68 a0 86 04 08 push $0x80486a0
8048460: 68 30 86 04 08 push $0x8048630
8048465: 51 push %ecx
8048466: 56 push %esi
8048467: 68 3e 85 04 08 push $0x804853e
804846c: e8 9f ff ff ff call 8048410 <__libc_start_main@plt>
8048471: f4 hlt
8048472: 90 nop
8048473: 90 nop
8048474: 90 nop
8048475: 90 nop
8048476: 90 nop
8048477: 90 nop
8048478: 90 nop
8048479: 90 nop
804847a: 90 nop
804847b: 90 nop
804847c: 90 nop
804847d: 90 nop
804847e: 90 nop
804847f: 90 nop
8048480: 55 push %ebp
8048481: 89 e5 mov %esp,%ebp
8048483: 53 push %ebx
8048484: 83 ec 04 sub $0x4,%esp
8048487: 80 3d 44 a0 04 08 00 cmpb $0x0,0x804a044
804848e: 75 3f jne 80484cf <strncmp@plt+0x8f>
8048490: a1 48 a0 04 08 mov 0x804a048,%eax
8048495: bb 20 9f 04 08 mov $0x8049f20,%ebx
804849a: 81 eb 1c 9f 04 08 sub $0x8049f1c,%ebx
80484a0: c1 fb 02 sar $0x2,%ebx
80484a3: 83 eb 01 sub $0x1,%ebx
80484a6: 39 d8 cmp %ebx,%eax
80484a8: 73 1e jae 80484c8 <strncmp@plt+0x88>
80484aa: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
80484b0: 83 c0 01 add $0x1,%eax
80484b3: a3 48 a0 04 08 mov %eax,0x804a048
80484b8: ff 14 85 1c 9f 04 08 call *0x8049f1c(,%eax,4)
80484bf: a1 48 a0 04 08 mov 0x804a048,%eax
80484c4: 39 d8 cmp %ebx,%eax
80484c6: 72 e8 jb 80484b0 <strncmp@plt+0x70>
80484c8: c6 05 44 a0 04 08 01 movb $0x1,0x804a044
80484cf: 83 c4 04 add $0x4,%esp
80484d2: 5b pop %ebx
80484d3: 5d pop %ebp
80484d4: c3 ret
80484d5: 8d 74 26 00 lea 0x0(%esi,%eiz,1),%esi
80484d9: 8d bc 27 00 00 00 00 lea 0x0(%edi,%eiz,1),%edi
80484e0: 55 push %ebp
80484e1: 89 e5 mov %esp,%ebp
80484e3: 83 ec 18 sub $0x18,%esp
80484e6: a1 24 9f 04 08 mov 0x8049f24,%eax
80484eb: 85 c0 test %eax,%eax
80484ed: 74 12 je 8048501 <strncmp@plt+0xc1>
80484ef: b8 00 00 00 00 mov $0x0,%eax
80484f4: 85 c0 test %eax,%eax
80484f6: 74 09 je 8048501 <strncmp@plt+0xc1>
80484f8: c7 04 24 24 9f 04 08 movl $0x8049f24,(%esp)
80484ff: ff d0 call *%eax
8048501: c9 leave
8048502: c3 ret
8048503: 90 nop
8048504: 55 push %ebp
8048505: 89 e5 mov %esp,%ebp
8048507: 83 ec 14 sub $0x14,%esp
804850a: 8b 45 08 mov 0x8(%ebp),%eax
804850d: 88 45 ec mov %al,-0x14(%ebp)
8048510: c7 45 fc 00 00 00 00 movl $0x0,-0x4(%ebp)
8048517: eb 1b jmp 8048534 <strncmp@plt+0xf4>
8048519: 8b 45 fc mov -0x4(%ebp),%eax
804851c: 03 45 0c add 0xc(%ebp),%eax
804851f: 8b 55 fc mov -0x4(%ebp),%edx
8048522: 03 55 0c add 0xc(%ebp),%edx
8048525: 0f b6 0a movzbl (%edx),%ecx
8048528: 0f b6 55 ec movzbl -0x14(%ebp),%edx
804852c: 31 ca xor %ecx,%edx
804852e: 88 10 mov %dl,(%eax)
8048530: 83 45 fc 01 addl $0x1,-0x4(%ebp)
8048534: 8b 45 fc mov -0x4(%ebp),%eax
8048537: 3b 45 10 cmp 0x10(%ebp),%eax
804853a: 7c dd jl 8048519 <strncmp@plt+0xd9>
804853c: c9 leave
804853d: c3 ret
804853e: 55 push %ebp
804853f: 89 e5 mov %esp,%ebp
8048541: 83 e4 f0 and $0xfffffff0,%esp
8048544: 83 ec 20 sub $0x20,%esp
8048547: c6 44 24 1f cf movb $0xcf,0x1f(%esp)
804854c: c7 04 24 0d 00 00 00 movl $0xd,(%esp)
8048553: e8 78 fe ff ff call 80483d0 <malloc@plt>
8048558: 89 44 24 18 mov %eax,0x18(%esp)
804855c: 83 7d 08 02 cmpl $0x2,0x8(%ebp)
8048560: 7f 0c jg 804856e <strncmp@plt+0x12e>
8048562: c7 04 24 ff ff ff ff movl $0xffffffff,(%esp)
8048569: e8 92 fe ff ff call 8048400 <exit@plt>
804856e: 8b 45 0c mov 0xc(%ebp),%eax
8048571: 83 c0 04 add $0x4,%eax
8048574: 8b 00 mov (%eax),%eax
8048576: c7 44 24 08 0d 00 00 movl $0xd,0x8(%esp)
804857d: 00
804857e: 89 44 24 04 mov %eax,0x4(%esp)
8048582: 8b 44 24 18 mov 0x18(%esp),%eax
8048586: 89 04 24 mov %eax,(%esp)
8048589: e8 92 fe ff ff call 8048420 <strncpy@plt>
804858e: 0f b6 44 24 1f movzbl 0x1f(%esp),%eax
8048593: c7 44 24 08 0c 00 00 movl $0xc,0x8(%esp)
804859a: 00
804859b: c7 44 24 04 30 a0 04 movl $0x804a030,0x4(%esp)
80485a2: 08
80485a3: 89 04 24 mov %eax,(%esp)
80485a6: e8 59 ff ff ff call 8048504 <strncmp@plt+0xc4>
80485ab: c7 44 24 08 14 00 00 movl $0x14,0x8(%esp)
80485b2: 00
80485b3: 8b 44 24 18 mov 0x18(%esp),%eax
80485b7: 89 44 24 04 mov %eax,0x4(%esp)
80485bb: c7 04 24 30 a0 04 08 movl $0x804a030,(%esp)
80485c2: e8 79 fe ff ff call 8048440 <strncmp@plt>
80485c7: 85 c0 test %eax,%eax
80485c9: 74 21 je 80485ec <strncmp@plt+0x1ac>
80485cb: b8 08 87 04 08 mov $0x8048708,%eax
80485d0: c7 44 24 04 30 a0 04 movl $0x804a030,0x4(%esp)
80485d7: 08
80485d8: 89 04 24 mov %eax,(%esp)
80485db: e8 e0 fd ff ff call 80483c0 <printf@plt>
80485e0: c7 04 24 ff ff ff ff movl $0xffffffff,(%esp)
80485e7: e8 14 fe ff ff call 8048400 <exit@plt>
80485ec: 8b 45 0c mov 0xc(%ebp),%eax
80485ef: 83 c0 08 add $0x8,%eax
80485f2: 8b 00 mov (%eax),%eax
80485f4: 89 04 24 mov %eax,(%esp)
80485f7: e8 34 fe ff ff call 8048430 <atoi@plt>
80485fc: 8b 15 40 a0 04 08 mov 0x804a040,%edx
8048602: 39 d0 cmp %edx,%eax
8048604: 74 18 je 804861e <strncmp@plt+0x1de>
8048606: c7 04 24 16 87 04 08 movl $0x8048716,(%esp)
804860d: e8 ce fd ff ff call 80483e0 <puts@plt>
8048612: c7 04 24 ff ff ff ff movl $0xffffffff,(%esp)
8048619: e8 e2 fd ff ff call 8048400 <exit@plt>
804861e: c7 04 24 1b 87 04 08 movl $0x804871b,(%esp)
8048625: e8 b6 fd ff ff call 80483e0 <puts@plt>
804862a: c9 leave
804862b: c3 ret
804862c: 90 nop
804862d: 90 nop
804862e: 90 nop
804862f: 90 nop
8048630: 55 push %ebp
8048631: 57 push %edi
8048632: 56 push %esi
8048633: 53 push %ebx
8048634: e8 69 00 00 00 call 80486a2 <strncmp@plt+0x262>
8048639: 81 c3 bb 19 00 00 add $0x19bb,%ebx
804863f: 83 ec 1c sub $0x1c,%esp
8048642: 8b 6c 24 30 mov 0x30(%esp),%ebp
8048646: 8d bb 20 ff ff ff lea -0xe0(%ebx),%edi
804864c: e8 23 fd ff ff call 8048374 <printf@plt-0x4c>
8048651: 8d 83 20 ff ff ff lea -0xe0(%ebx),%eax
8048657: 29 c7 sub %eax,%edi
8048659: c1 ff 02 sar $0x2,%edi
804865c: 85 ff test %edi,%edi
804865e: 74 29 je 8048689 <strncmp@plt+0x249>
8048660: 31 f6 xor %esi,%esi
8048662: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
8048668: 8b 44 24 38 mov 0x38(%esp),%eax
804866c: 89 2c 24 mov %ebp,(%esp)
804866f: 89 44 24 08 mov %eax,0x8(%esp)
8048673: 8b 44 24 34 mov 0x34(%esp),%eax
8048677: 89 44 24 04 mov %eax,0x4(%esp)
804867b: ff 94 b3 20 ff ff ff call *-0xe0(%ebx,%esi,4)
8048682: 83 c6 01 add $0x1,%esi
8048685: 39 fe cmp %edi,%esi
8048687: 75 df jne 8048668 <strncmp@plt+0x228>
8048689: 83 c4 1c add $0x1c,%esp
804868c: 5b pop %ebx
804868d: 5e pop %esi
804868e: 5f pop %edi
804868f: 5d pop %ebp
8048690: c3 ret
8048691: eb 0d jmp 80486a0 <strncmp@plt+0x260>
8048693: 90 nop
8048694: 90 nop
8048695: 90 nop
8048696: 90 nop
8048697: 90 nop
8048698: 90 nop
8048699: 90 nop
804869a: 90 nop
804869b: 90 nop
804869c: 90 nop
804869d: 90 nop
804869e: 90 nop
804869f: 90 nop
80486a0: f3 c3 repz ret
80486a2: 8b 1c 24 mov (%esp),%ebx
80486a5: c3 ret
80486a6: 90 nop
80486a7: 90 nop
80486a8: 90 nop
80486a9: 90 nop
80486aa: 90 nop
80486ab: 90 nop
80486ac: 90 nop
80486ad: 90 nop
80486ae: 90 nop
80486af: 90 nop
80486b0: 55 push %ebp
80486b1: 89 e5 mov %esp,%ebp
80486b3: 53 push %ebx
80486b4: 83 ec 04 sub $0x4,%esp
80486b7: a1 14 9f 04 08 mov 0x8049f14,%eax
80486bc: 83 f8 ff cmp $0xffffffff,%eax
80486bf: 74 13 je 80486d4 <strncmp@plt+0x294>
80486c1: bb 14 9f 04 08 mov $0x8049f14,%ebx
80486c6: 66 90 xchg %ax,%ax
80486c8: 83 eb 04 sub $0x4,%ebx
80486cb: ff d0 call *%eax
80486cd: 8b 03 mov (%ebx),%eax
80486cf: 83 f8 ff cmp $0xffffffff,%eax
80486d2: 75 f4 jne 80486c8 <strncmp@plt+0x288>
80486d4: 83 c4 04 add $0x4,%esp
80486d7: 5b pop %ebx
80486d8: 5d pop %ebp
80486d9: c3 ret
80486da: 90 nop
80486db: 90 nop
Disassembly of section .fini:
080486dc <.fini>:
80486dc: 53 push %ebx
80486dd: 83 ec 08 sub $0x8,%esp
80486e0: e8 00 00 00 00 call 80486e5 <strncmp@plt+0x2a5>
80486e5: 5b pop %ebx
80486e6: 81 c3 0f 19 00 00 add $0x190f,%ebx
80486ec: e8 8f fd ff ff call 8048480 <strncmp@plt+0x40>
80486f1: 83 c4 08 add $0x8,%esp
80486f4: 5b pop %ebx
80486f5: c3 ret