arrayPrint.asm

;assembly code to declare array and use push and pop  to print contents
section	.data
global x
x:    
   db  'l'
   db  'h'
   db  'h'
   db 'h'
   db 'h'
letter: 
   db  0
section	.text
   global _start   ;must be declared for linker (ld)
	
_start:	
 		
   mov  rax,5      ;number bytes to be summed 
   mov  rbx,0      ;EBX will store the sum
   mov  rcx, x     ;ECX will point to the current element to be summed

top: 
mov  rbx, [rcx] 
mov [letter],rbx ; move rbx into a variable letter
push rax ; push rax on stack
push rbx ; push rbx on stack
push rcx ; push rcx on stack
call display ; print letter
pop rcx ; get back from stack
pop rbx ; get back from stack
pop rax ; get back from stack
   add  rcx,1      ;move pointer to next element
   dec  rax        ;decrement counter
   jnz  top        ;if counter not 0, then loop again

call done ; end program

display:

   mov  edx,1      ;message length
   mov  ecx, letter   ;message to write
   mov  ebx, 1     ;file descriptor (stdout)
   mov  eax, 4     ;system call number (sys_write)
   int  0x80       ;call kernel
	ret
 done:
   mov  eax, 1     ;system call number (sys_exit)
   int  0x80       ;call kernel