ARM: tegra11: dvfs: Bound CL-DVFS safe voltage setting
[linux-2.6.git] / ipc / syscall.c
1 /*
2  * sys_ipc() is the old de-multiplexer for the SysV IPC calls.
3  *
4  * This is really horribly ugly, and new architectures should just wire up
5  * the individual syscalls instead.
6  */
7 #include <linux/unistd.h>
8
9 #ifdef __ARCH_WANT_SYS_IPC
10 #include <linux/errno.h>
11 #include <linux/ipc.h>
12 #include <linux/shm.h>
13 #include <linux/syscalls.h>
14 #include <linux/uaccess.h>
15
16 SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
17                 unsigned long, third, void __user *, ptr, long, fifth)
18 {
19         int version, ret;
20
21         version = call >> 16; /* hack for backward compatibility */
22         call &= 0xffff;
23
24         switch (call) {
25         case SEMOP:
26                 return sys_semtimedop(first, (struct sembuf __user *)ptr,
27                                       second, NULL);
28         case SEMTIMEDOP:
29                 return sys_semtimedop(first, (struct sembuf __user *)ptr,
30                                       second,
31                                       (const struct timespec __user *)fifth);
32
33         case SEMGET:
34                 return sys_semget(first, second, third);
35         case SEMCTL: {
36                 union semun fourth;
37                 if (!ptr)
38                         return -EINVAL;
39                 if (get_user(fourth.__pad, (void __user * __user *) ptr))
40                         return -EFAULT;
41                 return sys_semctl(first, second, third, fourth);
42         }
43
44         case MSGSND:
45                 return sys_msgsnd(first, (struct msgbuf __user *) ptr,
46                                   second, third);
47         case MSGRCV:
48                 switch (version) {
49                 case 0: {
50                         struct ipc_kludge tmp;
51                         if (!ptr)
52                                 return -EINVAL;
53
54                         if (copy_from_user(&tmp,
55                                            (struct ipc_kludge __user *) ptr,
56                                            sizeof(tmp)))
57                                 return -EFAULT;
58                         return sys_msgrcv(first, tmp.msgp, second,
59                                            tmp.msgtyp, third);
60                 }
61                 default:
62                         return sys_msgrcv(first,
63                                            (struct msgbuf __user *) ptr,
64                                            second, fifth, third);
65                 }
66         case MSGGET:
67                 return sys_msgget((key_t) first, second);
68         case MSGCTL:
69                 return sys_msgctl(first, second, (struct msqid_ds __user *)ptr);
70
71         case SHMAT:
72                 switch (version) {
73                 default: {
74                         unsigned long raddr;
75                         ret = do_shmat(first, (char __user *)ptr,
76                                        second, &raddr);
77                         if (ret)
78                                 return ret;
79                         return put_user(raddr, (unsigned long __user *) third);
80                 }
81                 case 1:
82                         /*
83                          * This was the entry point for kernel-originating calls
84                          * from iBCS2 in 2.2 days.
85                          */
86                         return -EINVAL;
87                 }
88         case SHMDT:
89                 return sys_shmdt((char __user *)ptr);
90         case SHMGET:
91                 return sys_shmget(first, second, third);
92         case SHMCTL:
93                 return sys_shmctl(first, second,
94                                    (struct shmid_ds __user *) ptr);
95         default:
96                 return -ENOSYS;
97         }
98 }
99 #endif