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GNU Debugger (GDB) is used for debugging C/C++ programs in LINUX/UNIX environments. It is a good tool to investigate what is happening inside a program, and how the contents inside the memory are changed with the execution of the program.

The main focus of the course is the disassembly of the program, where we'll use simple operations in C. With the help of GDB, we'll examine the contents of the registers and memory. We'll also learn how they are changed while executing basic operations. We’ll then explore the use of pointers, stack, and function parameters, and analyze how different registers update their values. With the help of disassembly output, we’ll learn how a simple C program can be reconstructed. The disassembly output is important for debugging and core dump analysis. We’ll use assembly language for x64 architecture.

By the end of this course, you should be able to debug the programs and memory contents at assembly level when a program executes or probe into the problem when a program crashes.

Debugging, Disassembly & Reversing in Linux for x64 Architecture

## Overview
The GNU debugger (GDB) is a popular debugger for Unix-like systems. It’s mainly used in C or C++ programs, though it supports other languages as well. This tool helps us trace and track modifications in different registers and memory locations during the execution of a program.

With the GDB, we can execute a program step by step and examine what is happening in the memory with each instruction or after a set of instructions. We can also monitor when a core dump happens, and when an error occurs in the program, we can tell which line caused that error.

## Prerequisites
This course will be the most beneficial to you if you already have a basic knowledge of **C**, **C++**, and **assembly** languages.

## Intended Audience
This course will be most useful for:
* Software technical support and escalation engineers
* Software engineers with a JVM background
* Software testers
* Engineers coming from non-Linux environments like Windows or Mac OS X
* Linux C and C++ software engineers without an assembly language background
* Security researchers without an assembly language background
* Beginners learning Linux software reverse engineering techniques



# Overview
The GNU debugger (GDB) is a popular debugger for Unix-like systems. It’s mainly used in C or C++ programs, though it supports other languages as well. This tool helps us trace and track modifications in different registers and memory locations during the execution of a program.

# Prerequisites
This course will be the most beneficial to you if you already have a basic knowledge of **C**, **C++**, and **assembly** languages.

# Intended Audience
This course will be most useful for:
* Software technical support and escalation engineers
* Software engineers with a JVM background
* Software testers
* Engineers coming from non-Linux environments like Windows or Mac OS X
* Linux C and C++ software engineers without an assembly language background
* Security researchers without an assembly language background
* Beginners learning Linux software reverse engineering techniques



Look at the details of the course, as well as its general prerequisites and intended audience.



Introduction

Look at the details of the course, as well as its general prerequisites and intended audience.

Introduction to the Course

Memory, Registers, and Simple Arithmetic

Code Optimization

Number Representations

Pointers

Bytes, Words, Double, and Quad Words

Pointers to Memory

Logical Instructions and RIP

Reconstructing a Program with Pointers

Memory and Stacks

Frame Pointer and Local Variables

Function Parameters

More Instructions

Function Pointer Parameters

Summary of Code Disassembly Patterns

Assessment

Introduction

Overview

Prerequisites

Intended Audience