?? vfork.s
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/* Copyright (C) 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */#include <sysdep.h>#define _ERRNO_H 1#include <bits/errno.h>#include <kernel-features.h>#include <bits/wordsize.h>#include <tcb-offsets.h>/* Clone the calling process, but without copying the whole address space. The calling process is suspended until the new process exits or is replaced by a call to `execve'. Return -1 for errors, 0 to the new process, and the process ID of the new process to the old process. */ENTRY (__vfork) ear %r4,%a0 sllg %r4,%r4,32 ear %r4,%a1 icm %r3,15,PID(%r4) llilh %r1,32768 je 1f lcr %r1,%r31: st %r1,PID(%r4) /* Do vfork system call. */ svc SYS_ify (vfork) ltgr %r2,%r2 je 1f st %r3,PID(%r4)1: /* Check for error. */ lghi %r4,-4095 clgr %r2,%r4 jgnl SYSCALL_ERROR_LABEL /* Normal return. */ br %r14PSEUDO_END(__vfork)libc_hidden_def (__vfork)weak_alias (__vfork, vfork)
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