BITS 32

; params: name number
%macro define_syscall0 2
global %1
%1:
	push %2 ; syscall number
	int 0x80 ; exec syscall
	add esp, 4

	ret
%endmacro

%macro define_syscall1 2
global %1
%1:
	push ebp
	mov ebp, esp
	
	mov eax, [ebp + 8]
	push eax
	push %2
	int 0x80
	add esp, 8
	
	pop ebp
	ret
%endmacro

%macro define_syscall2 2
global %1
%1:
	push ebp
	mov ebp, esp
	
	mov eax, [ebp + 12]
	push eax
	mov eax, [ebp + 8]
	push eax
;	push long 123
;	push long 0xCAFEBABE
	push %2
	int 0x80
	add esp, 12
	
	pop ebp
	ret
%endmacro

%macro define_syscall3 2
global %1
%1:
	push ebp
	mov ebp, esp
	
	mov eax, [ebp + 16]
	push eax
	mov eax, [ebp + 12]
	push eax
	mov eax, [ebp + 8]
	push eax
	push %2
	int 0x80
	add esp, 16
	
	pop ebp
	ret
%endmacro

SECTION .text

define_syscall0 exit, 0x01
define_syscall2 open, 0x02
define_syscall1 close, 0x03
define_syscall3 read, 0x04
define_syscall3 write, 0x05
define_syscall1 sbrk, 0x0F
define_syscall1 start_process, 0x10