Recap: Write Setup

Part of the Fundamentals section of Coddy's Assembly journey — lesson 42 of 45.

Challenge

Write a complete program that prints:

Start

Middle

End

Each word on its own line. Use three separate strings and three write syscalls.

The exit syscall must be included.

Try it yourself

section .data
    ; TODO: Define three strings with newlines
    ; TODO: Define their lengths

section .text
    global _start

_start:
    ; TODO: Print "Start"
    ; TODO: Print "Middle"
    ; TODO: Print "End"

    ; TODO: Exit cleanly

All lessons in Fundamentals

1The Machine

What is CPU Memory Registers vs Memory How instructions work Two-File Pattern The x86-64 Architecture

4Data Definition

The .data Section db - Define Byte dw - Define Word dd - Define Double Word dq - Define Quad Word Strings with db The $ Symbol Recap: Build data.asm

7Hello World

Planning the Program Writing data.asm

Writing main.asm

2Number Systems

Why Binary?Binary Numbers Decimal to Binary Why Hexadecimal?Hex to Decimal Decimal to Hex ASCII & Hex

5Exit Syscall

What is Syscall?Exit Syscall (60)Exit Codes Recap: Clean Exit

3First instruction - MOV

What is MOV?MOV Immediate MOV Register to Register MOV Memory to Register MOV Register to Memory LEA - Load Address MOV with Different Sizes Practice: Swap Registers Recap: MOV Challenge

6Write Syscall

Write Syscall (1)File Descriptor (rdi)Buffer Address (rsi)Byte Count (rdx)Putting It Together Printing Two Strings Newline MattersRecap: Write Setup