How to Extract Assembly Code from a Binary Executable in Linux?

Obtaining Assembly Code from a Binary Executable in Linux

To extract assembly code from a binary executable in Linux, disassembling tools are typically employed. While the GNU Compiler Collection (GCC) does not directly offer a disassembly functionality, the objdump utility from the same development environment provides the necessary capability.

To disassemble a binary executable using objdump, follow these steps:

<code class="Bash">$ objdump -d /path/to/binary</code>

This command will generate a disassembly of the executable, displaying assembly instructions similar to the following:

080483b4 <main>:
 80483b4:   8d 4c 24 04             lea    0x4(%esp),%ecx
 80483b8:   83 e4 f0                and    xfffffff0,%esp
 80483bb:   ff 71 fc                pushl  -0x4(%ecx)
 80483be:   55                      push   %ebp
 80483bf:   89 e5                   mov    %esp,%ebp
 80483c1:   51                      push   %ecx
 80483c2:   b8 00 00 00 00          mov    x0,%eax
 80483c7:   59                      pop    %ecx
 80483c8:   5d                      pop    %ebp
 80483c9:   8d 61 fc                lea    -0x4(%ecx),%esp
 80483cc:   c3                      ret    
 80483cd:   90                      nop
 80483ce:   90                      nop
 80483cf:   90                      nop</main>

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