Question

我知道.rodata部分将常量数据存储在ELF文件中。但是，当我转储内核模块的ELF时，我注意到有两个额外的部分名为rodata.str1.8和rodata.str1.1。似乎这两个部分也存储常量变量和字符串。但是这三个rodata之间究竟有什么区别？

Answer 1

看起来.rodata.str1.1的字符串没有对齐要求，而.rodata.str1.8必须是8字节对齐的。如果您查看带有readelf的ELF文件，则可以看到：

Section Headers:
  [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf Al
  [ 0]                   NULL            00000000 000000 000000 00      0   0  0
  [ 1] .text             PROGBITS        00000000 000034 000050 00  AX  0   0  4
  [ 2] .rela.text        RELA            00000000 000184 000030 0c   I  8   1  4
  [ 3] .data             PROGBITS        00000000 000084 000000 00  WA  0   0  1
  [ 4] .bss              NOBITS          00000000 000084 000000 00  WA  0   0  1
  [ 5] .rodata.str1.8    PROGBITS        00000000 000088 000010 01 AMS  0   0  8   <---
  [ 6] .comment          PROGBITS        00000000 000098 000019 01  MS  0   0  1
  [ 7] .shstrtab         STRTAB          00000000 0001b4 000049 00      0   0  1
  [ 8] .symtab           SYMTAB          00000000 0000b4 0000a0 10      9   7  4
  [ 9] .strtab           STRTAB          00000000 000154 00002f 00      0   0  1
Key to Flags:
  W (write), A (alloc), X (execute), M (merge), S (strings)
  I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
  O (extra OS processing required) o (OS specific), p (processor specific)

`.rodata.str1.8`部分在elf文件中的含义是什么

1 个答案: