xref: /minix/lib/libc/arch/or1k/sys/fork.S (revision 0a6a1f1d) 
1/*	$NetBSD: fork.S,v 1.1 2014/09/03 19:34:26 matt Exp $	*/
2
3/*
4 * pid = fork();
5 *
6 * r12 == 0 in parent process, 1 in child process.
7 * r11 == pid of child in parent, pid of parent in child.
8 */
9
10#include "SYS.h"
11
12_SYSCALL(__fork,fork)
13	l.addi	r12,r12,-1	# from 1 to 0 in child, 0 to -1 in parent
14	l.and	r11,r11,r12	# return 0 in child, pid in parent
15	l.jr	lr
16	l.nop
17END(__fork)
18