Lenky个人站点 ? 理解ELF文件

[root@localhost elf]# objdump -d -j .text test

test:     file format elf64-x86-64

Disassembly of section .text:

00000000004003c0 <_start>:

  4003c0:   31 ed                   xor    %ebp,%ebp

  4003c2:   49 89 d1                mov    %rdx,%r9

  4003c5:   5e                      pop    %rsi

  4003c6:   48 89 e2                mov    %rsp,%rdx

  4003c9:   48 83 e4 f0             and    $0xfffffffffffffff0,%rsp

  4003cd:   50                      push   %rax

  4003ce:   54                      push   %rsp

  4003cf:   49 c7 c0 00 05 40 00    mov    $0x400500,%r8

  4003d6:   48 c7 c1 10 05 40 00    mov    $0x400510,%rcx

  4003dd:   48 c7 c7 98 04 40 00    mov    $0x400498,%rdi

  4003e4:   e8 bf ff ff ff          callq  4003a8 <__libc_start_main@plt>

  4003e9:   f4                      hlt

  4003ea:   90                      nop

  4003eb:   90                      nop   

00000000004003ec <call_gmon_start>:

  4003ec:   48 83 ec 08             sub    $0x8,%rsp

  4003f0:   48 8b 05 b9 04 20 00    mov    2098361(%rip),%rax        # 6008b0 <_DYNAMIC+0x190>

  4003f7:   48 85 c0                test   %rax,%rax

  4003fa:   74 02                   je     4003fe <call_gmon_start+0x12>

  4003fc:   ff d0                   callq  *%rax

  4003fe:   48 83 c4 08             add    $0x8,%rsp

  400402:   c3                      retq

  400403:   90                      nop

  400404:   90                      nop

  400405:   90                      nop

  400406:   90                      nop

  400407:   90                      nop

  400408:   90                      nop

  400409:   90                      nop

  40040a:   90                      nop

  40040b:   90                      nop

  40040c:   90                      nop

  40040d:   90                      nop

  40040e:   90                      nop

  40040f:   90                      nop   

0000000000400410 <__do_global_dtors_aux>:

  400410:   55                      push   %rbp

  400411:   48 89 e5                mov    %rsp,%rbp

  400414:   53                      push   %rbx

  400415:   48 83 ec 08             sub    $0x8,%rsp

  400419:   80 3d d0 04 20 00 00    cmpb   $0x0,2098384(%rip)        # 6008f0 <completed.6145>

  400420:   75 44                   jne    400466 <__do_global_dtors_aux+0x56>

  400422:   b8 10 07 60 00          mov    $0x600710,%eax

  400427:   48 2d 08 07 60 00       sub    $0x600708,%rax

  40042d:   48 c1 f8 03             sar    $0x3,%rax

  400431:   48 8d 58 ff             lea    0xffffffffffffffff(%rax),%rbx

  400435:   48 8b 05 ac 04 20 00    mov    2098348(%rip),%rax        # 6008e8 <__bss_start>

  40043c:   48 39 c3                cmp    %rax,%rbx

  40043f:   76 1e                   jbe    40045f <__do_global_dtors_aux+0x4f>

  400441:   48 83 c0 01             add    $0x1,%rax

  400445:   48 89 05 9c 04 20 00    mov    %rax,2098332(%rip)        # 6008e8 <__bss_start>

  40044c:   ff 14 c5 08 07 60 00    callq  *0x600708(,%rax,8)

  400453:   48 8b 05 8e 04 20 00    mov    2098318(%rip),%rax        # 6008e8 <__bss_start>

  40045a:   48 39 c3                cmp    %rax,%rbx

  40045d:   77 e2                   ja     400441 <__do_global_dtors_aux+0x31>

  40045f:   c6 05 8a 04 20 00 01    movb   $0x1,2098314(%rip)        # 6008f0 <completed.6145>

  400466:   48 83 c4 08             add    $0x8,%rsp

  40046a:   5b                      pop    %rbx

  40046b:   c9                      leaveq

  40046c:   c3                      retq

  40046d:   0f 1f 00                nopl   (%rax)

0000000000400470 <frame_dummy>:

  400470:   55                      push   %rbp

  400471:   48 83 3d 9f 02 20 00    cmpq   $0x0,2097823(%rip)        # 600718 <__JCR_END__>

  400478:   00

  400479:   48 89 e5                mov    %rsp,%rbp

  40047c:   74 16                   je     400494 <frame_dummy+0x24>

  40047e:   b8 00 00 00 00          mov    $0x0,%eax

  400483:   48 85 c0                test   %rax,%rax

  400486:   74 0c                   je     400494 <frame_dummy+0x24>

  400488:   bf 18 07 60 00          mov    $0x600718,%edi

  40048d:   49 89 c3                mov    %rax,%r11

  400490:   c9                      leaveq

  400491:   41 ff e3                jmpq   *%r11

  400494:   c9                      leaveq

  400495:   c3                      retq

  400496:   90                      nop

  400497:   90                      nop   

0000000000400498 <main>:

  400498:   55                      push   %rbp

  400499:   48 89 e5                mov    %rsp,%rbp

  40049c:   48 83 ec 20             sub    $0x20,%rsp

  4004a0:   89 7d ec                mov    %edi,0xffffffffffffffec(%rbp)

  4004a3:   48 89 75 e0             mov    %rsi,0xffffffffffffffe0(%rbp)

  4004a7:   c7 45 fc 03 00 00 00    movl   $0x3,0xfffffffffffffffc(%rbp)

  4004ae:   bf f8 05 40 00          mov    $0x4005f8,%edi

  4004b3:   b8 00 00 00 00          mov    $0x0,%eax

  4004b8:   e8 db fe ff ff          callq  400398 <printf@plt>

  4004bd:   8b 35 21 04 20 00       mov    2098209(%rip),%esi        # 6008e4 <global_data>

  4004c3:   bf 05 06 40 00          mov    $0x400605,%edi

  4004c8:   b8 00 00 00 00          mov    $0x0,%eax

  4004cd:   e8 c6 fe ff ff          callq  400398 <printf@plt>

  4004d2:   8b 35 1c 04 20 00       mov    2098204(%rip),%esi        # 6008f4 <global_data_2>

  4004d8:   bf 17 06 40 00          mov    $0x400617,%edi

  4004dd:   b8 00 00 00 00          mov    $0x0,%eax

  4004e2:   e8 b1 fe ff ff          callq  400398 <printf@plt>

  4004e7:   8b 75 fc                mov    0xfffffffffffffffc(%rbp),%esi

  4004ea:   bf 2b 06 40 00          mov    $0x40062b,%edi

  4004ef:   b8 00 00 00 00          mov    $0x0,%eax

  4004f4:   e8 9f fe ff ff          callq  400398 <printf@plt>

  4004f9:   b8 00 00 00 00          mov    $0x0,%eax

  4004fe:   c9                      leaveq

  4004ff:   c3                      retq  

0000000000400500 <__libc_csu_fini>:

  400500:   f3 c3                   repz retq

  400502:   0f 1f 80 00 00 00 00    nopl   0x0(%rax)

  400509:   0f 1f 80 00 00 00 00    nopl   0x0(%rax)

0000000000400510 <__libc_csu_init>:

  400510:   4c 89 64 24 e0          mov    %r12,0xffffffffffffffe0(%rsp)

  400515:   4c 89 6c 24 e8          mov    %r13,0xffffffffffffffe8(%rsp)

  40051a:   4c 8d 25 d3 01 20 00    lea    2097619(%rip),%r12        # 6006f4 <__fini_array_end>

  400521:   4c 89 74 24 f0          mov    %r14,0xfffffffffffffff0(%rsp)

  400526:   4c 89 7c 24 f8          mov    %r15,0xfffffffffffffff8(%rsp)

  40052b:   49 89 f6                mov    %rsi,%r14

  40052e:   48 89 5c 24 d0          mov    %rbx,0xffffffffffffffd0(%rsp)

  400533:   48 89 6c 24 d8          mov    %rbp,0xffffffffffffffd8(%rsp)

  400538:   48 83 ec 38             sub    $0x38,%rsp

  40053c:   41 89 ff                mov    %edi,%r15d

  40053f:   49 89 d5                mov    %rdx,%r13

  400542:   e8 29 fe ff ff          callq  400370 <_init>

  400547:   48 8d 05 a6 01 20 00    lea    2097574(%rip),%rax        # 6006f4 <__fini_array_end>

  40054e:   49 29 c4                sub    %rax,%r12

  400551:   49 c1 fc 03             sar    $0x3,%r12

  400555:   4d 85 e4                test   %r12,%r12

  400558:   74 1e                   je     400578 <__libc_csu_init+0x68>

  40055a:   31 ed                   xor    %ebp,%ebp

  40055c:   48 89 c3                mov    %rax,%rbx

  40055f:   90                      nop

  400560:   48 83 c5 01             add    $0x1,%rbp

  400564:   4c 89 ea                mov    %r13,%rdx

  400567:   4c 89 f6                mov    %r14,%rsi

  40056a:   44 89 ff                mov    %r15d,%edi

  40056d:   ff 13                   callq  *(%rbx)

  40056f:   48 83 c3 08             add    $0x8,%rbx

  400573:   49 39 ec                cmp    %rbp,%r12

  400576:   75 e8                   jne    400560 <__libc_csu_init+0x50>

  400578:   48 8b 5c 24 08          mov    0x8(%rsp),%rbx

  40057d:   48 8b 6c 24 10          mov    0x10(%rsp),%rbp

  400582:   4c 8b 64 24 18          mov    0x18(%rsp),%r12

  400587:   4c 8b 6c 24 20          mov    0x20(%rsp),%r13

  40058c:   4c 8b 74 24 28          mov    0x28(%rsp),%r14

  400591:   4c 8b 7c 24 30          mov    0x30(%rsp),%r15

  400596:   48 83 c4 38             add    $0x38,%rsp

  40059a:   c3                      retq

  40059b:   90                      nop

  40059c:   90                      nop

  40059d:   90                      nop

  40059e:   90                      nop

  40059f:   90                      nop   

00000000004005a0 <__do_global_ctors_aux>:

  4005a0:   55                      push   %rbp

  4005a1:   48 89 e5                mov    %rsp,%rbp

  4005a4:   53                      push   %rbx

  4005a5:   bb f8 06 60 00          mov    $0x6006f8,%ebx

  4005aa:   48 83 ec 08             sub    $0x8,%rsp

  4005ae:   48 8b 05 43 01 20 00    mov    2097475(%rip),%rax        # 6006f8 <__CTOR_LIST__>

  4005b5:   48 83 f8 ff             cmp    $0xffffffffffffffff,%rax

  4005b9:   74 14                   je     4005cf <__do_global_ctors_aux+0x2f>

  4005bb:   0f 1f 44 00 00          nopl   0x0(%rax,%rax,1)

  4005c0:   48 83 eb 08             sub    $0x8,%rbx

  4005c4:   ff d0                   callq  *%rax

  4005c6:   48 8b 03                mov    (%rbx),%rax

  4005c9:   48 83 f8 ff             cmp    $0xffffffffffffffff,%rax

  4005cd:   75 f1                   jne    4005c0 <__do_global_ctors_aux+0x20>

  4005cf:   48 83 c4 08             add    $0x8,%rsp

  4005d3:   5b                      pop    %rbx

  4005d4:   c9                      leaveq

  4005d5:   c3                      retq

  4005d6:   90                      nop

  4005d7:   90                      nop

[root@localhost elf]#