arch/openrisc/kernel/sys_or32.c

   1 /*
   2  * OpenRISC sys_or32.c
   3  *
   4  * Linux architectural port borrowing liberally from similar works of
   5  * others.  All original copyrights apply as per the original source
   6  * declaration.
   7  *
   8  * Modifications for the OpenRISC architecture:
   9  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
  10  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  11  *
  12  *      This program is free software; you can redistribute it and/or
  13  *      modify it under the terms of the GNU General Public License
  14  *      as published by the Free Software Foundation; either version
  15  *      2 of the License, or (at your option) any later version.
  16  *
  17  * This file contains various random system calls that
  18  * have a non-standard calling sequence on some platforms.
  19  * Since we don't have to do any backwards compatibility, our
  20  * versions are done in the most "normal" way possible.
  21  */
  22
  23 #include <linux/errno.h>
  24 #include <linux/syscalls.h>
  25 #include <linux/mm.h>
  26
  27 #include <asm/syscalls.h>
  28
  29 /* These are secondary entry points as the primary entry points are defined in
  30  * entry.S where we add the 'regs' parameter value
  31  */
  32
  33 asmlinkage long _sys_clone(unsigned long clone_flags, unsigned long newsp,
  34                            int __user *parent_tid, int __user *child_tid,
  35                            struct pt_regs *regs)
  36 {
  37         long ret;
  38
  39         /* FIXME: Is alignment necessary? */
  40         /* newsp = ALIGN(newsp, 4); */
  41
  42         if (!newsp)
  43                 newsp = regs->sp;
  44
  45         ret = do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid);
  46
  47         return ret;
  48 }
  49
  50 asmlinkage int _sys_fork(struct pt_regs *regs)
  51 {
  52 #ifdef CONFIG_MMU
  53         return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL);
  54 #else
  55         return -EINVAL;
  56 #endif
  57 }