How Can I List Symbols Within a .so File?

Listing Symbols Within a .so File: A Comprehensive Guide

Introduction

Identifying the symbols contained within a .so file can be crucial for understanding the file's functionality and its relationship with other libraries. This article provides a detailed walkthrough of utilizing various tools to efficiently list symbols in a .so file.

Using 'nm' for Symbol Listing

'nm' is the standard tool for listing symbols in a file, including .so files. The following command can be used:

nm -gD yourLib.so

Adding the "-C" option to the command allows for the demangling of C symbols, making them more readable.

nm -gDC yourLib.so

Alternative Options for Elf Files

For .so files in elf format, two alternatives to 'nm' exist:

• 'objdump': Use the following command with the "-TC" option for demangling C symbols:

objdump -TC libz.so

• 'readelf': The following command displays a symbol table with information about each symbol:

readelf -Ws libz.so

By utilizing these techniques, developers can effectively list the symbols in a .so file, gaining insight into its exported symbols and potential dependencies.

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