Program Structure

Every program must define an entry point—the location where program execution begins.

In RASM, the entry point is a label named _start or main.

The simplest possible program looks like this:

main:
    mov rax, 60
    xor rdi, rdi
    syscall

A program typically consists of one or more sections. The most commonly used sections are:

• .text — executable code;
• .data — initialized data;
• .bss — uninitialized data.

Each section contains a specific type of code or data.