Assembly codes and Exercises

HelloWorld.s

#A Hello World in assembly language - linux x86 - by Vivek-Ramachandran 
#compile it with the commands bellow:
#
# as -o HelloWorld.o HelloWorld.s
# ld -o HelloWorld HelloWorld.o

.data

  HelloWorld:
    .ascii "Hello world!\n"

.text
  .globl _start

  _start:
    
    #load arguments for syscall write (number 4. You can check it with >>> cat /usr/include/unistd.h)
    #write( index, buffer, size )
    movl $4, %eax
    movl $1, %ebx
    movl $HelloWorld, %ecx
    movl $13, %edx              #13 bytes
    int $0x80

    #exit(0)
    movl $1, %eax
    movl $0, %ebx
    int $0x80