📖 Assembly Instructions & Directives

Assembly language is made up of two main things: instructions that tell the CPU what to do, and directives that guide the assembler on how to process your code.

⚙️ Common Instructions

mov destination, source — Moves data from one place to another
add destination, source — Adds a value to a register
sub destination, source — Subtracts a value
int 0x80 — Performs a Linux system call
jmp label — Jumps to a label in code

📌 Common Directives

section .data — Holds initialized data
section .bss — Holds uninitialized data
section .text — Contains the code/instructions
global _start — Marks the program's entry point
db, dw, dd — Define byte, word, doubleword

📚 Example Code: Moving & Adding

section .text
    global _start

_start:
    mov eax, 8      ; Load 8 into eax
    add eax, 2      ; Add 2
    ; eax now holds 10

    mov eax, 1      ; sys_exit
    int 0x80

💡 Pro Tip: Keep comments (;) on every line of Assembly code when you’re starting out — it’ll save you pain later.

🖥️ Simulated Output

Final value in eax = 10 (after adding 8 + 2)