Assembler

TODO

Näited

???

assembler; label l1, l2;

asm
 mov dx,3DAh
 l1:
  in al, dx
  and al,08h
  jnz l1
 l2:
  in al,dx
  and al,08h
  jz l2

Hello World

global _start
  
section .data
        hello   db      "Hello, World!", 10
        length  equ     $-hello
  
section .text
  
_start:
        mov eax, 4      ; write to file
        mov ebx, 1      ; STDOUT handle
        mov ecx, hello  ; our message
        mov edx, length ; size of message
        int 80h         ; execute the syscall
 
        xor ebx, ebx    ; send 0 as 'exit code'
        mov eax, 1      ; terminate process
        int 80h         ; execute the syscall

Kompileerimine

Oletame, et soovime kompileerida programmi helloworld, mille assembleri kood on failis helloworld.asm.

Linuxile saab kompileerimiseks sikutada programmi nimega nasm.

nasm -f elf helloworld.asm

Käsu kävivitamisel genereetitakse meile fail nimega helloworld.o.

ld -o helloworld helloworld.o

Käsu kävitamisel genereeritakse meile käivitatav programm nimega helloworld. Programmi käivitatakse nagu teisigi programme:

./helloworld

Lingid

http://www.csn.ul.ie/~darkstar/assembler/

http://www.csn.ul.ie/~darkstar/assembler/intlist.html