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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 

 *

 * 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 

 */

#define _ERRNO_H        1

#include 

#define _SYSCALL_H

#include 

#include 

/* 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)