⚙️ Assembly Functions

Functions in Assembly are just labeled chunks of code you jump to and return from. Since Assembly doesn’t have built-in function syntax, you manage the flow and the stack manually.

🔑 Key Concepts

call function_name — jump to a function and save return address on stack
ret — return from function, popping the return address off the stack
Use the stack to pass parameters and save registers
Functions often use push and pop to save registers and local data

📚 Example Code: Simple Function Call

section .text
    global _start

_start:
    call say_hello     ; Call function

    mov eax, 1         ; sys_exit
    int 0x80

say_hello:
    ; Here you could put code that prints "Hello" (simulated)
    ; For now, just return
    ret

💡 Pro Tip: Always use ret at the end of functions to return control back properly.

🖥️ Simulated Output

Called function say_hello. (In real code, this would print "Hello" or do work.)