HelloAssembler

This is an example of "Hello Fnord" in Assembler:

vi hello.asm

---

section .data                    ;section declaration msg db "Hello, fnord!" ;der String section .text                    ;section declaration global _start                   ;default Eingangspunkt fuer ELF-Link

_start:


 * write call

mov eax, 4                   ;4 in eax, weil write syscall #4 ist mov ebx, 1                   ;stdout in ebx, weil die richtige fd 1 ist mov ecx, msg               ;die Adresse des Strings in ecx mov edx, 13                 ;13 in edx, weil der String 13 Bytes enthaelt int 0x80                       ;Kernelaufruf, um den System-Call auszuloesen


 * exit call

mov eax,1                   ;1 in eax, weil exit syscall #1 ist mov ebx,0                   ;0 in ebx int 0x80                      ;Kernelaufruf, um den System-Call auszuloesen

---

put this into hello.asm then compile it with nasm

$ nasm -f elf hello.asm

link it

$ ld hello.o

run it

$ ./a.out

Hello, fnord!

tataaaa! you wrote your first assembler program.