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/*
* libc/sysdeps/linux/v850/vfork.S -- `vfork' syscall for linux/v850
*
* Copyright (C) 2001,2002 NEC Corporation
* Copyright (C) 2001,2002 Miles Bader <miles@gnu.org>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License. See the file COPYING.LIB in the main
* directory of this archive for more details.
*
* Written by Miles Bader <miles@gnu.org>
*/
#define _ERRNO_H 1
#include <bits/errno.h>
#define _SYSCALL_H
#include <bits/sysnum.h>
#include <clinkage.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. */
.global C_SYMBOL_NAME(errno)
C_ENTRY (__vfork):
addi SYS_vfork, r0, r12
trap 0
addi -125, r0, r11 // minimum err value
cmp r11, r10
bh 1f
jmp [lp] // normal return
1: mov hilo(C_SYMBOL_NAME(errno)), r11
subr r0, r10
st.w r10, 0[r11]
jmp [lp] // error return
C_END(__vfork)
.weak C_SYMBOL_NAME(vfork)
C_SYMBOL_NAME(vfork) = C_SYMBOL_NAME(__vfork)
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