 

用户1642694

文章：297 阅读：368341 评论：100 赞：3247

 好友  私信个人主页

文章 297
原创 0
阅读 368341
评论 100
赞 3247

原创 Linux命令学习手册-readelf命令

 2014-9-4 19:05  1334 12 12 分类: MCU/ 嵌入式

*查看一个包含调试信息的可执行的elf文件的节信息：

[quietheart@lv-k cppDemo]$ readelf -S main.debug

输入之后，输出如下：

There are 37 section headers, starting at offset 0x88c8:

Section Headers:

[Nr] Name Type Addr Off Size ES lg 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] .gnu.hash GNU_HASH 08048168 000168 000030 04 A 4 0 4

[ 4] .dynsym DYNSYM 08048198 000198 0000d0 10 A 5 1 4

[ 5] .dynstr STRTAB 08048268 000268 000183 00 A 0 0 1

[ 6] .gnu.version VERSYM 080483ec 0003ec 00001a 02 A 4 0 2

[ 7] .gnu.version_r VERNEED 08048408 000408 000060 00 A 5 2 4

[ 8] .rel.dyn REL 08048468 000468 000010 08 A 4 0 4

[ 9] .rel.plt REL 08048478 000478 000048 08 A 4 11 4

[10] .init PROGBITS 080484c0 0004c0 000017 00 AX 0 0 4

[11] .plt PROGBITS 080484d8 0004d8 0000a0 04 AX 0 0 4

[12] .text PROGBITS 08048580 000580 000268 00 AX 0 0 16

[13] .fini PROGBITS 080487e8 0007e8 00001c 00 AX 0 0 4

[14] .rodata PROGBITS 08048804 000804 00001a 00 A 0 0 4

[15] .eh_frame_hdr PROGBITS 08048820 000820 000044 00 A 0 0 4

[16] .eh_frame PROGBITS 08048864 000864 00010c 00 A 0 0 4

[17] .ctors PROGBITS 08049970 000970 00000c 00 WA 0 0 4

[18] .dtors PROGBITS 0804997c 00097c 000008 00 WA 0 0 4

[19] .jcr PROGBITS 08049984 000984 000004 00 WA 0 0 4

[20] .dynamic DYNAMIC 08049988 000988 0000e0 08 WA 5 0 4

[21] .got PROGBITS 08049a68 000a68 000004 04 WA 0 0 4

[22] .got.plt PROGBITS 08049a6c 000a6c 000030 04 WA 0 0 4

[23] .data PROGBITS 08049a9c 000a9c 000004 00 WA 0 0 4

[24] .bss NOBITS 08049aa0 000aa0 000098 00 WA 0 0 8

[25] .comment PROGBITS 00000000 000aa0 000114 00 0 0 1

[26] .debug_aranges PROGBITS 00000000 000bb4 000020 00 0 0 1

[27] .debug_pubnames PROGBITS 00000000 000bd4 000028 00 0 0 1

[28] .debug_info PROGBITS 00000000 000bfc 0067aa 00 0 0 1

[29] .debug_abbrev PROGBITS 00000000 0073a6 000726 00 0 0 1

[30] .debug_line PROGBITS 00000000 007acc 0003e1 00 0 0 1

[31] .debug_frame PROGBITS 00000000 007eb0 00009c 00 0 0 4

[32] .debug_str PROGBITS 00000000 007f4c 000735 00 0 0 1

[33] .debug_loc PROGBITS 00000000 008681 0000f3 00 0 0 1

[34] .shstrtab STRTAB 00000000 008774 000151 00 0 0 1

[35] .symtab SYMTAB 00000000 008e90 000590 10 36 61 4

[36] .strtab STRTAB 00000000 009420 0003f4 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)

可见，相对非调试版本的可执行文件，多了".debug*"段的信息。

*查看一个目标文件的elf文件的节信息：

[quietheart@lv-k bak]$ readelf -S myfile.o

输入之后，输出如下：

There are 15 section headers, starting at offset 0x204:

Section Headers:

[Nr] Name Type Addr Off Size ES lg Lk Inf Al

[ 0] NULL 00000000 000000 000000 00 0 0 0

[ 1] .text PROGBITS 00000000 000034 00009e 00 AX 0 0 4

[ 2] .rel.text REL 00000000 000744 000060 08 13 1 4

[ 3] .data PROGBITS 00000000 0000d4 000000 00 WA 0 0 4

[ 4] .bss NOBITS 00000000 0000d4 000001 00 WA 0 0 4

[ 5] .ctors PROGBITS 00000000 0000d4 000004 00 WA 0 0 4

[ 6] .rel.ctors REL 00000000 0007a4 000008 08 13 5 4

[ 7] .rodata PROGBITS 00000000 0000d8 000006 00 A 0 0 1

[ 8] .eh_frame PROGBITS 00000000 0000e0 00008c 00 A 0 0 4

[ 9] .rel.eh_frame REL 00000000 0007ac 000028 08 13 8 4

[10] .comment PROGBITS 00000000 00016c 00002e 00 0 0 1

[11] .note.GNU-stack PROGBITS 00000000 00019a 000000 00 0 0 1

[12] .shstrtab STRTAB 00000000 00019a 00006a 00 0 0 1

[13] .symtab SYMTAB 00000000 00045c 000180 10 14 14 4

[14] .strtab STRTAB 00000000 0005dc 000166 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)

*查看一个静态库文件的elf文件的节信息：

[quietheart@lv-k bak]$ readelf -S libmy.a

输入之后，输出如下：

File: libmy.a(myfile.o)

There are 15 section headers, starting at offset 0x204:

Section Headers:

[Nr] Name Type Addr Off Size ES lg Lk Inf Al

[ 0] NULL 00000000 000000 000000 00 0 0 0

[ 1] .text PROGBITS 00000000 000034 00009e 00 AX 0 0 4

[ 2] .rel.text REL 00000000 000744 000060 08 13 1 4

[ 3] .data PROGBITS 00000000 0000d4 000000 00 WA 0 0 4

[ 4] .bss NOBITS 00000000 0000d4 000001 00 WA 0 0 4

[ 5] .ctors PROGBITS 00000000 0000d4 000004 00 WA 0 0 4

[ 6] .rel.ctors REL 00000000 0007a4 000008 08 13 5 4

[ 7] .rodata PROGBITS 00000000 0000d8 000006 00 A 0 0 1

[ 8] .eh_frame PROGBITS 00000000 0000e0 00008c 00 A 0 0 4

[ 9] .rel.eh_frame REL 00000000 0007ac 000028 08 13 8 4

[10] .comment PROGBITS 00000000 00016c 00002e 00 0 0 1

[11] .note.GNU-stack PROGBITS 00000000 00019a 000000 00 0 0 1

[12] .shstrtab STRTAB 00000000 00019a 00006a 00 0 0 1

[13] .symtab SYMTAB 00000000 00045c 000180 10 14 14 4

[14] .strtab STRTAB 00000000 0005dc 000166 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)

*查看一个动态库文件的elf文件的节信息：

[quietheart@lv-k bak]$ readelf -S libmy.so

输入之后，输出如下：

There are 27 section headers, starting at offset 0xad0:

Section Headers:

[Nr] Name Type Addr Off Size ES lg Lk Inf Al

[ 0] NULL 00000000 000000 000000 00 0 0 0

[ 1] .gnu.hash GNU_HASH 000000d4 0000d4 00003c 04 A 2 0 4

[ 2] .dynsym DYNSYM 00000110 000110 000120 10 A 3 1 4

[ 3] .dynstr STRTAB 00000230 000230 000199 00 A 0 0 1

[ 4] .gnu.version VERSYM 000003ca 0003ca 000024 02 A 2 0 2

[ 5] .gnu.version_r VERNEED 000003f0 0003f0 000050 00 A 3 2 4

[ 6] .rel.dyn REL 00000440 000440 0000b0 08 A 2 0 4

[ 7] .rel.plt REL 000004f0 0004f0 000010 08 A 2 9 4

[ 8] .init PROGBITS 00000500 000500 000017 00 AX 0 0 4

[ 9] .plt PROGBITS 00000518 000518 000030 04 AX 0 0 4

[10] .text PROGBITS 00000550 000550 0001c4 00 AX 0 0 16

[11] .fini PROGBITS 00000714 000714 00001c 00 AX 0 0 4

[12] .rodata PROGBITS 00000730 000730 000006 00 A 0 0 1

[13] .eh_frame_hdr PROGBITS 00000738 000738 00002c 00 A 0 0 4

[14] .eh_frame PROGBITS 00000764 000764 000090 00 A 0 0 4

[15] .ctors PROGBITS 000017f4 0007f4 00000c 00 WA 0 0 4

[16] .dtors PROGBITS 00001800 000800 000008 00 WA 0 0 4

[17] .jcr PROGBITS 00001808 000808 000004 00 WA 0 0 4

[18] .data.rel.ro PROGBITS 0000180c 00080c 000004 00 WA 0 0 4

[19] .dynamic DYNAMIC 00001810 000810 0000e0 08 WA 3 0 4

[20] .got PROGBITS 000018f0 0008f0 00000c 04 WA 0 0 4

[21] .got.plt PROGBITS 000018fc 0008fc 000014 04 WA 0 0 4

[22] .bss NOBITS 00001910 000910 00000c 00 WA 0 0 4

[23] .comment PROGBITS 00000000 000910 0000e6 00 0 0 1

[24] .shstrtab STRTAB 00000000 0009f6 0000da 00 0 0 1

[25] .symtab SYMTAB 00000000 000f08 000410 10 26 48 4

[26] .strtab STRTAB 00000000 001318 000333 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)

[其它]

曾想将这个命令和其他binutils（例如objcopy,objdump,gprof,gcc,gdb等编译相关工具）工具作为单独工具来分类，可是对其输出解释的不够详细，所以只能做为一个命令了，更详细地解释，需要结合对elf文件有深入地了解。

更多信息的参考资料：

http://www.cnblogs.com/amethyst623/articles/1946499.html

info readelf

info binutils

关于elf文件的资料参见:

http://linux.chinaunix.net/techdoc/beginner/2009/04/23/1108716.shtml

http://www.dz3w.com/mcu/linux/0070701.html

http://www.sudu.cn/info/html/edu/20080428/302819.html

或者"man elf"

am in st a c

写原创有奖励！2024面包板原创奖励正在进行中

上一篇： Linux命令学习手册-readelf命令
下一篇：【嵌入式Linux学习七步曲之第五篇 Linux内核及驱动编程】Linux内核抢占实现机制分析

IIC Shenzhen - 2024国际集成电路展览会暨研讨会（深圳，11.5-6）

2024 AI& Connect 是德创新技术峰会（深圳，10.22）

第六届意法半导体工业峰会2024（深圳，10.29）

2024 Arm Tech Symposia 年度大会（上海/深圳，11月19/21日）

文章评论（0条评论）

登录后参与讨论

我要评论

 0

 12

关闭站长推荐