navigaid
11/28/2016 - 1:19 PM
NASM Hello World for x86 and x86_64 Intel Mac OS X (get yourself an updated nasm with brew)
NASM Hello World for x86 and x86_64 Intel Mac OS X
(get yourself an updated nasm with brew)
- NASM Manual - for the syntax
- What are the calling conventions for UNIX & Linux system calls on x86-64 - comparison
- AMD64 ABI reference - A.2.1 - for the actual x86_64 calling convention
- X86 calling conventions - moar calling conventions
- Mac OS X syscalls reference
; /usr/local/bin/nasm -f macho64 64.asm && ld -macosx_version_min 10.7.0 -lSystem -o 64 64.o && ./64
global start
section .text
start:
mov rax, 0x2000004 ; write
mov rdi, 1 ; stdout
mov rsi, msg
mov rdx, msg.len
syscall
mov rax, 0x2000001 ; exit
mov rdi, 0
syscall
section .data
msg: db "Hello, world!", 10
.len: equ $ - msg
; /usr/local/bin/nasm -f macho 32.asm && ld -macosx_version_min 10.7.0 -o 32 32.o && ./32
global start
section .text
start:
push dword msg.len
push dword msg
push dword 1
mov eax, 4
sub esp, 4
int 0x80
add esp, 16
push dword 0
mov eax, 1
sub esp, 12
int 0x80
section .data
msg: db "Hello, world!", 10
.len: equ $ - msg