/* * 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)