Re: [Nasm-users] can't write argv[0] on stdout - solved

[Holger H. <ha...@gm...>]

On Tue, 18 Aug 2009 21:19:21 +0200
Holger Hanrath <ha...@gm...> wrote:


here is the program what that does what i want in native x86_64:

; write 3 bytes from argv[0] to stdout
; syscall numbers from asm/unistd_64.h
stdout		equ	1
write		equ	1
exit		equ	60
	
section .text
     global _start

     _start:
	pop	rax		; rax = argc 
	pop	rax		; rax = argv[0]
	
         ; place the length of the string in RDX
	mov	rdx,	3	; write 3 bytes
	
	; print the string using write() system call
	mov     rsi, 	rax	; write needs the address of the string in rsi
        mov     rdi,	stdout	
	mov	rax,	write
        syscall

         ; exit from the application here
        xor     rdi,	rdi	; return 0
        mov     rax, 	exit
        syscall