readelf显示错误的部分偏移

时间:2016-11-09 13:29:08

标签: c linux elf readelf

对于ELF文件的某些部分,' .dynstr'例如,在节头表的结构中写入的偏移是" readelf -a"不报道。例如,偏移是" 0x0245"但是readelf报告" 0x0300"作为该部分的偏移量。我可以确认" readelf"使用HexEditor是错误的。对于前几节,readelf报告的是相应的偏移是正确的,但是有些指向下的所有偏移都是错误的。有没有人知道为什么报告的偏移量与文件中写的不同?或者这是与readelf相关的错误?

注意:使用" objdump -h"我还可以确认readelf报告的偏移是错误的

Note2 :“readelf'”返回的一些偏移量。甚至比文件大小还要大。

这是输出示例或readelf:

Section Headers:
  [Nr] Name              Type             Address           Offset
       Size              EntSize          Flags  Link  Info  Align
  [ 0]                   NULL             0000000000000000  00000000
       0000000000000000  0000000000000000           0     0     0
  [ 1] .interp           PROGBITS         0000000000400200  00000200
       000000000000001c  0000000000000000   A       0     0     1
  [ 2] .note.ABI-tag     NOTE             000000000040021c  0000021c
       0000000000000020  0000000000000000   A       0     0     4
  [ 3] .note.gnu.build-i NOTE             000000000040023c  0000023c
       0000000000000024  0000000000000000   A       0     0     4
  [ 4] .gnu.hash         GNU_HASH         0000000000400260  00000260
       000000000000001c  0000000000000000   A       5     0     8
  [ 5] .dynsym           DYNSYM           0000000000400280  00000280
       0000000000000120  0000000000000018   A       6     1     8
  >> [ 6] .dynstr           STRTAB           00000000004003a0  000003a0  <<< 0x3a0 is wrong
       0000000000000084  0000000000000000   A       0     0     1

这是&#39; objdump -h&#39;输出:

Sections:
Idx Name          Size      VMA               LMA               File off  Algn
  0 .interp       0000001c  0000000000400200  0000000000400200  00000200  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  1 .note.ABI-tag 00000020  000000000040021c  000000000040021c  0000021c  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  2 .note.gnu.build-id 00000024  000000000040023c  000000000040023c  0000023c  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  3 .gnu.hash     0000001c  0000000000400260  0000000000400260  00000260  2**3
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  4 .dynsym       00000048  0000000000400280  0000000000400280  00000280  2**3
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  5 .dynstr       00000038  00000000004002c8  00000000004002c8  000002c8  2**0
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  6 .gnu.version  00000006  0000000000400300  0000000000400300  00000300  2**1
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  7 .gnu.version_r 00000020  0000000000400308  0000000000400308  00000308  2**3
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  8 .rela.dyn     00000018  0000000000400328  0000000000400328  00000328  2**3
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
  9 .rela.plt     00000030  0000000000400340  0000000000400340  00000340  2**3
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
 10 .init         0000001a  0000000000400370  0000000000400370  00000370  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
 11 .plt          00000030  0000000000400390  0000000000400390  00000390  2**4
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
 12 .text         00000182  00000000004003c0  00000000004003c0  000003c0  2**4
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
 13 .fini         00000009  0000000000400544  0000000000400544  00000544  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, CODE
 14 .rodata       00000004  0000000000400550  0000000000400550  00000550  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
 15 .eh_frame_hdr 00000034  0000000000400554  0000000000400554  00000554  2**2
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
 16 .eh_frame     000000f4  0000000000400588  0000000000400588  00000588  2**3
                  CONTENTS, ALLOC, LOAD, READONLY, DATA
 17 .init_array   00000008  0000000000600680  0000000000600680  00000680  2**3
                  CONTENTS, ALLOC, LOAD, DATA
 18 .fini_array   00000008  0000000000600688  0000000000600688  00000688  2**3
                  CONTENTS, ALLOC, LOAD, DATA
 19 .jcr          00000008  0000000000600690  0000000000600690  00000690  2**3
                  CONTENTS, ALLOC, LOAD, DATA
 20 .dynamic      000001d0  0000000000600698  0000000000600698  00000698  2**3
                  CONTENTS, ALLOC, LOAD, DATA
 21 .got          00000008  0000000000600868  0000000000600868  00000868  2**3
                  CONTENTS, ALLOC, LOAD, DATA
 22 .got.plt      00000028  0000000000600870  0000000000600870  00000870  2**3
                  CONTENTS, ALLOC, LOAD, DATA
 23 .data         00000014  0000000000600898  0000000000600898  00000898  2**3
                  CONTENTS, ALLOC, LOAD, DATA
 24 .bss          00000004  00000000006008ac  00000000006008ac  000008ac  2**0
                  ALLOC
 25 .comment      00000039  0000000000000000  0000000000000000  000008ac  2**0
                  CONTENTS, READONLY

0 个答案:

没有答案