使用objdump 和readelf 两个命令，我们可以看到elf的各个节段的 信息还有 运行时需要那些动态链接库，elf中的汇编代码等等。 我就是想用来查看 这个elf运行需要哪些 *.so 文件
#include<stdio.h>
int test()
{
return 0;
}
int main(void)
{
int i;
int j =0;
//printf ("sizeof (int)=%d\n",sizeof (int));
if ( i = j )
printf ("\ntrue\n",i);
return 0;
}
gcc main.c 编译后，
@linuxidc:~/桌面$ readelf -a a.out
ELF Header:
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: 0x8048310
Start of program headers: 52 (bytes into file)
Start of section headers: 5996 (bytes into file)
Flags: 0x0
Size of this header: 52 (bytes)
Size of program headers: 32 (bytes)
Number of program headers: 8
Size of section headers: 40 (bytes)
Number of section headers: 36
Section header string table index: 33
Section Headers:
[Nr] Name Type Addr Off Size ES Flg Lk Inf Al
[ 0] NULL 00000000 000000 000000 00 0 0 0
[ 1] .interp PROGBITS 08048134 000134 000013 00 A 0 0 1
[ 2] .note.ABI-tag NOTE 08048148 000148 000020 00 A 0 0 4
[ 3] .hash HASH 08048168 000168 000028 04 A 5 0 4
[ 4] .gnu.hash GNU_HASH 08048190 000190 000020 04 A 5 0 4
[ 5] .dynsym DYNSYM 080481b0 0001b0 000050 10 A 6 1 4
[ 6] .dynstr STRTAB 08048200 000200 00004c 00 A 0 0 1
[ 7] .gnu.version VERSYM 0804824c 00024c 00000a 02 A 5 0 2
[ 8] .gnu.version_r VERNEED 08048258 000258 000020 00 A 6 1 4
[ 9] .rel.dyn REL 08048278 000278 000008 08 A 5 0 4
[10] .rel.plt REL 08048280 000280 000018 08 A 5 12 4
[11] .init PROGBITS 08048298 000298 000030 00 AX 0 0 4
[12] .plt PROGBITS 080482c8 0002c8 000040 04 AX 0 0 4
[13] .text PROGBITS 08048310 000310 0001ac 00 AX 0 0 16
[14] .fini PROGBITS 080484bc 0004bc 00001c 00 AX 0 0 4
[15] .rodata PROGBITS 080484d8 0004d8 00000f 00 A 0 0 4
[16] .eh_frame PROGBITS 080484e8 0004e8 000004 00 A 0 0 4
[17] .ctors PROGBITS 08049f0c 000f0c 000008 00 WA 0 0 4
[18] .dtors PROGBITS 08049f14 000f14 000008 00 WA 0 0 4
[19] .jcr PROGBITS 08049f1c 000f1c 000004 00 WA 0 0 4
[20] .dynamic DYNAMIC 08049f20 000f20 0000d0 08 WA 6 0 4
[21] .got PROGBITS 08049ff0 000ff0 000004 04 WA 0 0 4
[22] .got.plt PROGBITS 08049ff4 000ff4 000018 04 WA 0 0 4
[23] .data PROGBITS 0804a00c 00100c 000008 00 WA 0 0 4
[24] .bss NOBITS 0804a014 001014 000008 00 WA 0 0 4
[25] .comment PROGBITS 00000000 001014 0000fc 00 0 0 1
[26] .debug_aranges PROGBITS 00000000 001110 000070 00 0 0 8
[27] .debug_pubnames PROGBITS 00000000 001180 000025 00 0 0 1
[28] .debug_info PROGBITS 00000000 0011a5 0001b5 00 0 0 1
[29] .debug_abbrev PROGBITS 00000000 00135a 000083 00 0 0 1
[30] .debug_line PROGBITS 00000000 0013dd 000180 00 0 0 1
[31] .debug_str PROGBITS 00000000 00155d 00008e 01 MS 0 0 1
[32] .debug_ranges PROGBITS 00000000 0015f0 000040 00 0 0 8
[33] .shstrtab STRTAB 00000000 001630 000139 00 0 0 1
[34] .symtab SYMTAB 00000000 001d0c 0004b0 10 35 54 4
[35] .strtab STRTAB 00000000 0021bc 000213 00 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings)
I (info), L (link order), G (group), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
There are no section groups in this file.