testing

Makefile

@@ -1,6 +1,7 @@
 .PHONY: all clean
 
 SRC := $(wildcard *.asm)
+SRC := $(filter-out functions.asm, $(SRC))
 OBJDIR := build
 OBJS := $(SRC:%.asm=$(OBJDIR)/%.o)
 BINS := $(SRC:%.asm=$(OBJDIR)/%)

helloworld.asm

@@ -1,17 +1,22 @@
-; Hello World Program - asmtutor.com
-; Compile with: nasm -f elf helloworld.asm
-; Link with (64 bit systems require elf_i386 option): ld -m elf_i386 helloworld.o -o helloworld
-; Run with: ./helloworld
+; %include        'functions.asm'
 
-SECTION .data
-msg     db      'Hello World!', 0Ah     ; assign msg variable with your message string
+SYS_EXIT    equ 1
+SYS_WRITE   equ 4
+STDOUT      equ 1
 
-SECTION .text
+section .data
+msg     db      "Hello, world!", 0Ah
+
+section .text
 global _start
 
 _start:
-    mov     edx, 13     ; number of bytes to write - one for each letter plus 0Ah (line feed character)
-    mov     ecx, msg    ; move the memory address of our message string into ecx
-    mov     ebx, 1      ; write to the STDOUT file
-    mov     eax, 4      ; invoke SYS_WRITE (kernel opcode 4)
-    int     80h
+    mov     edx, 14
+    mov     ecx, msg
+    mov     ebx, STDOUT
+    mov     eax, SYS_WRITE
+    int     0x80
+
+    mov     ebx, 0
+    mov     eax, SYS_EXIT
+    int     0x80