CSC231 Crash Course Solution 3

--D. Thiebaut 15:09, 4 March 2011 (EST)

---

;;; prog3.asm
;;; D. Thiebaut
;;; solution for Exercise #3
;;; 
;;; Assemble, link and run as follows:
;;;   nasm -f elf asm_io.asm        (do this only once)
;;;   nasm -f elf prog3.asm
;;;   gcc -o prog3 driver.c prog3.o asm_io.o
;;;   ./prog3
;;; 
%include "asm_io.inc"
        
%assign SYS_EXIT        1

        ;; -------------------------
        ;; data segment
        ;; -------------------------
        section .data
a       dd      3
b       dd      5
c       dd      8
d       dd      10
e       dd      20        
result  dd      0

        ;; -------------------------
        ;; code area
        ;; -------------------------
        section .text
        global  asm_main
asm_main:       
        mov     eax,[a]
        add     eax,[b]
        add     eax,[c]
        add     eax,[d]
        add     eax,[e]
        mov     [result],eax
        
        mov     eax,[result]          ; pass result to print_int
        call    print_int             ; and print value

        call    print_nl              ; call the function that prints
                                      ; a new blank line

        ;; return to C program

        ret