arch/mn10300/kernel/sys_mn10300.c

   1 /* MN10300 Weird system calls
   2  *
   3  * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
   4  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11 #include <linux/errno.h>
  12 #include <linux/sched.h>
  13 #include <linux/syscalls.h>
  14 #include <linux/mm.h>
  15 #include <linux/smp.h>
  16 #include <linux/sem.h>
  17 #include <linux/msg.h>
  18 #include <linux/shm.h>
  19 #include <linux/stat.h>
  20 #include <linux/mman.h>
  21 #include <linux/file.h>
  22 #include <linux/tty.h>
  23
  24 #include <asm/uaccess.h>
  25
  26 asmlinkage long old_mmap(unsigned long addr, unsigned long len,
  27                          unsigned long prot, unsigned long flags,
  28                          unsigned long fd, unsigned long offset)
  29 {
  30         if (offset & ~PAGE_MASK)
  31                 return -EINVAL;
  32         return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
  33 }
  34
  35 struct sel_arg_struct {
  36         unsigned long n;
  37         fd_set *inp;
  38         fd_set *outp;
  39         fd_set *exp;
  40         struct timeval *tvp;
  41 };
  42
  43 asmlinkage int old_select(struct sel_arg_struct __user *arg)
  44 {
  45         struct sel_arg_struct a;
  46
  47         if (copy_from_user(&a, arg, sizeof(a)))
  48                 return -EFAULT;
  49         /* sys_select() does the appropriate kernel locking */
  50         return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
  51 }
  52
  53 /*
  54  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
  55  *
  56  * This is really horribly ugly.
  57  */
  58 asmlinkage long sys_ipc(uint call, int first, int second,
  59                         int third, void __user *ptr, long fifth)
  60 {
  61         int version, ret;
  62
  63         version = call >> 16; /* hack for backward compatibility */
  64         call &= 0xffff;
  65
  66         switch (call) {
  67         case SEMOP:
  68                 return sys_semtimedop(first, (struct sembuf __user *)ptr,
  69                                       second, NULL);
  70         case SEMTIMEDOP:
  71                 return sys_semtimedop(first, (struct sembuf __user *)ptr,
  72                                       second,
  73                                       (const struct timespec __user *)fifth);
  74         case SEMGET:
  75                 return sys_semget(first, second, third);
  76         case SEMCTL: {
  77                 union semun fourth;
  78                 if (!ptr)
  79                         return -EINVAL;
  80                 if (get_user(fourth.__pad, (void __user * __user *) ptr))
  81                         return -EFAULT;
  82                 return sys_semctl(first, second, third, fourth);
  83         }
  84
  85         case MSGSND:
  86                 return sys_msgsnd(first, (struct msgbuf __user *) ptr,
  87                                   second, third);
  88         case MSGRCV:
  89                 switch (version) {
  90                 case 0: {
  91                         struct ipc_kludge tmp;
  92                         if (!ptr)
  93                                 return -EINVAL;
  94
  95                         if (copy_from_user(&tmp,
  96                                            (struct ipc_kludge __user *) ptr,
  97                                            sizeof(tmp)))
  98                                 return -EFAULT;
  99                         return sys_msgrcv(first, tmp.msgp, second,
 100                                           tmp.msgtyp, third);
 101                 }
 102                 default:
 103                         return sys_msgrcv(first,
 104                                           (struct msgbuf __user *) ptr,
 105                                            second, fifth, third);
 106                 }
 107         case MSGGET:
 108                 return sys_msgget((key_t) first, second);
 109         case MSGCTL:
 110                 return sys_msgctl(first, second,
 111                                    (struct msqid_ds __user *) ptr);
 112
 113         case SHMAT:
 114                 switch (version) {
 115                 default: {
 116                         ulong raddr;
 117                         ret = do_shmat(first, (char __user *) ptr, second,
 118                                        &raddr);
 119                         if (ret)
 120                                 return ret;
 121                         return put_user(raddr, (ulong *) third);
 122                 }
 123                 case 1: /* iBCS2 emulator entry point */
 124                         if (!segment_eq(get_fs(), get_ds()))
 125                                 return -EINVAL;
 126                         return do_shmat(first, (char __user *) ptr, second,
 127                                         (ulong *) third);
 128                 }
 129         case SHMDT:
 130                 return sys_shmdt((char __user *)ptr);
 131         case SHMGET:
 132                 return sys_shmget(first, second, third);
 133         case SHMCTL:
 134                 return sys_shmctl(first, second,
 135                                   (struct shmid_ds __user *) ptr);
 136         default:
 137                 return -EINVAL;
 138         }
 139 }