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- /*
- * libc/sysdeps/linux/v850/vfork.S -- `vfork' syscall for linux/v850
- *
- * Copyright (C) 2001 NEC Corporation
- * Copyright (C) 2001 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/syscall.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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