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
SYSCALL_DEFINE6(ipc,unsigned int,call,int,first,unsigned long,second,unsigned long,third,void __user *,ptr,long,fifth)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 unsigned long arg;
37 if (!ptr)
38 return -EINVAL;
39 if (get_user(arg, (unsigned long __user *) ptr))
40 return -EFAULT;
41 return sys_semctl(first, second, third, arg);
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, SHMLBA);
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
100