linux中，查看符号表的方法

• 查看符号表，利用nm：利用gcc编译链接生成的输出文件a.out，可以通过如下指令查看：

$gcc -o a.out main.c

$nm a.out

• 查看ELF信息，利用readelf：

//读取ELF header

$readelf -Wh a.out

 

Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00

 

Class: ELF32

 

Data: 2's complement, little endian

 

Version: 1 (current)

 

OS/ABI: UNIX - System V

 

ABI Version: 0

 

Type: EXEC (Executable file)

 

Machine: Intel 80386

 

Version: 0x1

 

Entry point address: 0x8048320

 

Start of program headers: 52 (bytes into file)

 

Start of section headers: 4436 (bytes into file)

 

Flags: 0x0

 

Size of this header: 52 (bytes)

 

Size of program headers: 32 (bytes)

 

Number of program headers: 9

 

Size of section headers: 40 (bytes)

 

Number of section headers: 30

 

Section header string table index: 27

 

 

//读取section header

$readelf -Ws a.out

 

//读取program header

$readelf -Wl a.out

 

• 利用objdump -s，查看elf section内容

$objdump -s a.out

• 利用gdb，也可以查看符号表

详见gdb手册。https://sourceware.org/gdb/current/onlinedocs/gdb/Symbols.html#Symbols