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/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>
24 #include <asm/uaccess.h>
26 #define MIN_MAP_ADDR PAGE_SIZE /* minimum fixed mmap address */
29 * memory mapping syscall
31 asmlinkage
long sys_mmap2(unsigned long addr
, unsigned long len
,
32 unsigned long prot
, unsigned long flags
,
33 unsigned long fd
, unsigned long pgoff
)
35 struct file
*file
= NULL
;
38 flags
&= ~(MAP_EXECUTABLE
| MAP_DENYWRITE
);
40 if (flags
& MAP_FIXED
&& addr
< MIN_MAP_ADDR
)
44 if (!(flags
& MAP_ANONYMOUS
)) {
50 down_write(¤t
->mm
->mmap_sem
);
51 error
= do_mmap_pgoff(file
, addr
, len
, prot
, flags
, pgoff
);
52 up_write(¤t
->mm
->mmap_sem
);
60 asmlinkage
long old_mmap(unsigned long addr
, unsigned long len
,
61 unsigned long prot
, unsigned long flags
,
62 unsigned long fd
, unsigned long offset
)
64 if (offset
& ~PAGE_MASK
)
66 return sys_mmap2(addr
, len
, prot
, flags
, fd
, offset
>> PAGE_SHIFT
);
69 struct sel_arg_struct
{
77 asmlinkage
int old_select(struct sel_arg_struct __user
*arg
)
79 struct sel_arg_struct a
;
81 if (copy_from_user(&a
, arg
, sizeof(a
)))
83 /* sys_select() does the appropriate kernel locking */
84 return sys_select(a
.n
, a
.inp
, a
.outp
, a
.exp
, a
.tvp
);
88 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
90 * This is really horribly ugly.
92 asmlinkage
long sys_ipc(uint call
, int first
, int second
,
93 int third
, void __user
*ptr
, long fifth
)
97 version
= call
>> 16; /* hack for backward compatibility */
102 return sys_semtimedop(first
, (struct sembuf __user
*)ptr
,
105 return sys_semtimedop(first
, (struct sembuf __user
*)ptr
,
107 (const struct timespec __user
*)fifth
);
109 return sys_semget(first
, second
, third
);
114 if (get_user(fourth
.__pad
, (void __user
* __user
*) ptr
))
116 return sys_semctl(first
, second
, third
, fourth
);
120 return sys_msgsnd(first
, (struct msgbuf __user
*) ptr
,
125 struct ipc_kludge tmp
;
129 if (copy_from_user(&tmp
,
130 (struct ipc_kludge __user
*) ptr
,
133 return sys_msgrcv(first
, tmp
.msgp
, second
,
137 return sys_msgrcv(first
,
138 (struct msgbuf __user
*) ptr
,
139 second
, fifth
, third
);
142 return sys_msgget((key_t
) first
, second
);
144 return sys_msgctl(first
, second
,
145 (struct msqid_ds __user
*) ptr
);
151 ret
= do_shmat(first
, (char __user
*) ptr
, second
,
155 return put_user(raddr
, (ulong
*) third
);
157 case 1: /* iBCS2 emulator entry point */
158 if (!segment_eq(get_fs(), get_ds()))
160 return do_shmat(first
, (char __user
*) ptr
, second
,
164 return sys_shmdt((char __user
*)ptr
);
166 return sys_shmget(first
, second
, third
);
168 return sys_shmctl(first
, second
,
169 (struct shmid_ds __user
*) ptr
);
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