1/* $NetBSD: compat_Ovfork.S,v 1.2 2011/01/15 07:31:13 matt Exp $ */ 2 3/* 4 * pid = vfork(); 5 * 6 * r4 == 0 in parent process, 1 in child process. 7 * r3 == pid of child in parent, pid of parent in child. 8 */ 9 10#include "SYS.h" 11 12#if defined(LIBC_SCCS) 13__RCSID("$NetBSD: compat_Ovfork.S,v 1.2 2011/01/15 07:31:13 matt Exp $") 14#endif 15 16WARN_REFERENCES(vfork, \ 17 "warning: reference to compatibility vfork(); include <unistd.h> for correct reference") 18 19SYSCALL(vfork) 20 addi %r4,%r4,-1 # from 1 to 0 in child, 0 to -1 in parent 21 and %r3,%r3,%r4 # return 0 in child, pid in parent 22 blr 23END(vfork) 24