Linux操作系统中readelf命令常见用法

超、凢脫俗 2022-05-18 04:14 579阅读 0赞

本文主要介绍 Linux 操作系统中 readelf 命令的常见用法。

# 1 ELF #

在介绍 readelf 之前，首先需要讲一下 ELF（Executable and Linkable Format），这里直接引用 Wikipedia 中关于 ELF 的（部分）介绍内容：

> **In computing, the Executable and Linkable Format (ELF, formerly named Extensible Linking Format), is a common standard file format for executable files, object code, shared libraries, and core dumps.** First published in the specification for the application binary interface (ABI) of the Unix operating system version named System V Release 4 (SVR4), and later in the Tool Interface Standard, it was quickly accepted among different vendors of Unix systems. In 1999, it was chosen as the standard binary file format for Unix and Unix-like systems on x86 processors by the 86open project.
> 
> By design, the ELF format is flexible, extensible, and cross-platform. For instance it supports different endiannesses and address sizes so it does not exclude any particular central processing unit (CPU) or instruction set architecture. This has allowed it to be adopted by many different operating systems on many different hardware platforms.

# 2 概述 #

引用 Manual 手册中对于 readelf 的描述，内容如下：

> readelf - Displays information about ELF files.
> 
> **readelf displays information about one or more ELF format object files.  **The options control what particular information to display.
> 
> This program performs a similar function to objdump but it goes into more detail and it exists independently of the BFD library, so if there is a bug in BFD then readelf will not be affected.

# 2 语法 #

readelf 命令格式为：readelf \[option\]... elffile...

elffile... are the object files to be examined.  32-bit and 64-bit ELF files are supported, as are archives containing ELF files.

# 3 常见用法 #

**-d 选项，--dynamic：**Displays the contents of the file's dynamic section, if it has one. 使用此选项可以查看 ELF 文件的动态库信息。