Assembly program :

  • .data section : This section is for declaring initialized data. { filenames and buffer sizes } DB, DW, DD, DQ and DT instructions.
section .data
		message: db "hello world"
		msglength: equ 12
		buffersize: dw 1024
  • .bss section : This is where variables are been decleared. RESB, RESW, RESD, RESQ, REST instrcutions are use to reserve uninitialized space in memory for your variables.
section .bss
		filename: resb 255 ; reserve 255 bytes
		number: resb 1     ; Reserve 1 byte
		bignum: resw 1     ; Reserve 1 word (1 word = 2 bytes)
		realarray: resq 10 ; Reserve an array of 10 reals

  • .text section : This is where the actual assembly code is written.

      this section must begin with the declaration global_start,
  // this tells the kernel where the program execution begins. == "main" @other_languages