1 /* MN10300 Weird system calls
3 * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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.
11 #include <linux/errno.h>
12 #include <linux/sched.h>
13 #include <linux/syscalls.h>
15 #include <linux/smp.h>
16 #include <linux/smp_lock.h>
17 #include <linux/sem.h>
18 #include <linux/msg.h>
19 #include <linux/shm.h>
20 #include <linux/stat.h>
21 #include <linux/mman.h>
22 #include <linux/file.h>
23 #include <linux/utsname.h>
24 #include <linux/syscalls.h>
25 #include <linux/tty.h>
27 #include <asm/uaccess.h>
29 #define MIN_MAP_ADDR PAGE_SIZE /* minimum fixed mmap address */
32 * sys_pipe() is the normal C calling standard for creating
33 * a pipe. It's not the way Unix traditionally does this, though.
35 asmlinkage long sys_pipe(unsigned long __user *fildes)
42 if (copy_to_user(fildes, fd, 2 * sizeof(int)))
49 * memory mapping syscall
51 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
52 unsigned long prot, unsigned long flags,
53 unsigned long fd, unsigned long pgoff)
55 struct file *file = NULL;
58 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
60 if (flags & MAP_FIXED && addr < MIN_MAP_ADDR)
64 if (!(flags & MAP_ANONYMOUS)) {
70 down_write(¤t->mm->mmap_sem);
71 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
72 up_write(¤t->mm->mmap_sem);
80 asmlinkage long old_mmap(unsigned long addr, unsigned long len,
81 unsigned long prot, unsigned long flags,
82 unsigned long fd, unsigned long offset)
84 if (offset & ~PAGE_MASK)
86 return sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
89 struct sel_arg_struct {
97 asmlinkage int old_select(struct sel_arg_struct __user *arg)
99 struct sel_arg_struct a;
101 if (copy_from_user(&a, arg, sizeof(a)))
103 /* sys_select() does the appropriate kernel locking */
104 return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
108 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
110 * This is really horribly ugly.
112 asmlinkage long sys_ipc(uint call, int first, int second,
113 int third, void __user *ptr, long fifth)
117 version = call >> 16; /* hack for backward compatibility */
122 return sys_semtimedop(first, (struct sembuf __user *)ptr,
125 return sys_semtimedop(first, (struct sembuf __user *)ptr,
127 (const struct timespec __user *)fifth);
129 return sys_semget(first, second, third);
134 if (get_user(fourth.__pad, (void __user * __user *) ptr))
136 return sys_semctl(first, second, third, fourth);
140 return sys_msgsnd(first, (struct msgbuf __user *) ptr,
145 struct ipc_kludge tmp;
149 if (copy_from_user(&tmp,
150 (struct ipc_kludge __user *) ptr,
153 return sys_msgrcv(first, tmp.msgp, second,
157 return sys_msgrcv(first,
158 (struct msgbuf __user *) ptr,
159 second, fifth, third);
162 return sys_msgget((key_t) first, second);
164 return sys_msgctl(first, second,
165 (struct msqid_ds __user *) ptr);
171 ret = do_shmat(first, (char __user *) ptr, second,
175 return put_user(raddr, (ulong *) third);
177 case 1: /* iBCS2 emulator entry point */
178 if (!segment_eq(get_fs(), get_ds()))
180 return do_shmat(first, (char __user *) ptr, second,
184 return sys_shmdt((char __user *)ptr);
186 return sys_shmget(first, second, third);
188 return sys_shmctl(first, second,
189 (struct shmid_ds __user *) ptr);