Overview

This category covers x86-64 assembly programming with NASM on GNU/Linux: syntax, addressing, arithmetic, data definitions, program structure, strings, and syscalls.

Pages

• Assembly Programming: Overview & Conventions
• mov Instruction: Registers, Immediates, Memory
• Addressing Modes: Direct, Indirect, Base+Index, Offsets
• Memory Operands in Other Instructions (add, etc.)
• Labels and Entry Point (_start)
• Arithmetic: add, sub, inc, dec
• Signed Integers and Flags (Two’s Complement)
• Sign Extension and Negation (movsx, neg)
• Multiplication and Division (mul, imul, div, idiv)
• Program Structure: .data, .bss, .text, global _start
• Data Definition Directives: db, dw, dd, dq, equ
• Strings in Assembly: Buffers, Length with $ and equ, Concatenation
• Linux x86-64 Syscalls: syscall, Registers, sys_write, sys_exit
• Hands-on: Debugger Exercise for Register Parts (AX/BX/CX)