retroforth/experimental/linux.s
2018-01-30 17:25:44 +00:00

40 lines
385 B
ArmAsm

bits 32
section .text
global putchar
global getchar
global _start
extern main
align 4
_start:
call main
jmp $
align 4
putchar:
mov eax, [esp+4]
mov [buf], eax
mov edx, 1
mov ecx, buf
mov ebx, 1
mov eax, 4
int 0x80
ret
align 4
getchar:
mov edx, 1
mov ecx, buf
mov ebx, 0
mov eax, 3
int 0x80
mov eax, 0
mov eax, [buf]
ret
section .data
buf:
dd 0
dd 0
dd 0
dd 0