SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 /*
  36  * sys_ipc() is the de-multiplexer for the SysV IPC calls..
  37  *
  38  * This is really horribly ugly.
  39  */
  40 asmlinkage long sys_ipc(uint call, int first, int second,
  41                         int third, void __user *ptr, long fifth)
  42 {
  43         int version, ret;
  44
  45         version = call >> 16; /* hack for backward compatibility */
  46         call &= 0xffff;
  47
  48         switch (call) {
  49         case SEMOP:
  50                 return sys_semtimedop(first, (struct sembuf __user *)ptr,
  51                                       second, NULL);
  52         case SEMTIMEDOP:
  53                 return sys_semtimedop(first, (struct sembuf __user *)ptr,
  54                                       second,
  55                                       (const struct timespec __user *)fifth);
  56         case SEMGET:
  57                 return sys_semget(first, second, third);
  58         case SEMCTL: {
  59                 union semun fourth;
  60                 if (!ptr)
  61                         return -EINVAL;
  62                 if (get_user(fourth.__pad, (void __user * __user *) ptr))
  63                         return -EFAULT;
  64                 return sys_semctl(first, second, third, fourth);
  65         }
  66
  67         case MSGSND:
  68                 return sys_msgsnd(first, (struct msgbuf __user *) ptr,
  69                                   second, third);
  70         case MSGRCV:
  71                 switch (version) {
  72                 case 0: {
  73                         struct ipc_kludge tmp;
  74                         if (!ptr)
  75                                 return -EINVAL;
  76
  77                         if (copy_from_user(&tmp,
  78                                            (struct ipc_kludge __user *) ptr,
  79                                            sizeof(tmp)))
  80                                 return -EFAULT;
  81                         return sys_msgrcv(first, tmp.msgp, second,
  82                                           tmp.msgtyp, third);
  83                 }
  84                 default:
  85                         return sys_msgrcv(first,
  86                                           (struct msgbuf __user *) ptr,
  87                                            second, fifth, third);
  88                 }
  89         case MSGGET:
  90                 return sys_msgget((key_t) first, second);
  91         case MSGCTL:
  92                 return sys_msgctl(first, second,
  93                                    (struct msqid_ds __user *) ptr);
  94
  95         case SHMAT:
  96                 switch (version) {
  97                 default: {
  98                         ulong raddr;
  99                         ret = do_shmat(first, (char __user *) ptr, second,
 100                                        &raddr);
 101                         if (ret)
 102                                 return ret;
 103                         return put_user(raddr, (ulong *) third);
 104                 }
 105                 case 1: /* iBCS2 emulator entry point */
 106                         if (!segment_eq(get_fs(), get_ds()))
 107                                 return -EINVAL;
 108                         return do_shmat(first, (char __user *) ptr, second,
 109                                         (ulong *) third);
 110                 }
 111         case SHMDT:
 112                 return sys_shmdt((char __user *)ptr);
 113         case SHMGET:
 114                 return sys_shmget(first, second, third);
 115         case SHMCTL:
 116                 return sys_shmctl(first, second,
 117                                   (struct shmid_ds __user *) ptr);
 118         default:
 119                 return -EINVAL;
 120         }
 121 }