asmtutorials/x86/argv.s

25 lines
816 B
ArmAsm

;; Hello World Program #7 & 8: Println (in functions) and command line arguments
%include "functions.asm"
section .text
global _start
;;; We'll show how to access any arguments passed in by the
;;; environment (usually the Shell).
_start:
pop ecx ; The first object on the stack is ARGC: The number of arguments passed in.
next_arg:
cmp ecx, 0h ; If there are no arguments, or no more arguments left, exit.
jz exit
pop eax ; The stack currently has pointer to the messages, null-terminated
; So we pop one off, put it into the register used by putslf, and...
call putslf
dec ecx ; Drop the count by one, and try again.
jmp next_arg
exit:
call exit_program