1 /* $Id: sys_cris.c,v 1.6 2004/03/11 11:38:40 starvik Exp $
2 *
3 * linux/arch/cris/kernel/sys_cris.c
4 *
5 * This file contains various random system calls that
6 * have a non-standard calling sequence on some platforms.
7 * Since we don't have to do any backwards compatibility, our
8 * versions are done in the most "normal" way possible.
9 *
10 */
11
12 #include <linux/errno.h>
13 #include <linux/sched.h>
14 #include <linux/syscalls.h>
15 #include <linux/mm.h>
16 #include <linux/fs.h>
17 #include <linux/smp.h>
18 #include <linux/smp_lock.h>
19 #include <linux/sem.h>
20 #include <linux/msg.h>
21 #include <linux/shm.h>
22 #include <linux/stat.h>
23 #include <linux/mman.h>
24 #include <linux/file.h>
25 #include <linux/ipc.h>
26
27 #include <asm/uaccess.h>
28 #include <asm/segment.h>
29
30 /* common code for old and new mmaps */
31 static inline long
do_mmap2(unsigned long addr,unsigned long len,unsigned long prot,unsigned long flags,unsigned long fd,unsigned long pgoff)32 do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
33 unsigned long flags, unsigned long fd, unsigned long pgoff)
34 {
35 int error = -EBADF;
36 struct file * file = NULL;
37
38 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
39 if (!(flags & MAP_ANONYMOUS)) {
40 file = fget(fd);
41 if (!file)
42 goto out;
43 }
44
45 down_write(¤t->mm->mmap_sem);
46 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
47 up_write(¤t->mm->mmap_sem);
48
49 if (file)
50 fput(file);
51 out:
52 return error;
53 }
54
old_mmap(unsigned long __user * args)55 asmlinkage unsigned long old_mmap(unsigned long __user *args)
56 {
57 unsigned long buffer[6];
58 int err = -EFAULT;
59
60 if (copy_from_user(&buffer, args, sizeof(buffer)))
61 goto out;
62
63 err = -EINVAL;
64 if (buffer[5] & ~PAGE_MASK) /* verify that offset is on page boundary */
65 goto out;
66
67 err = do_mmap2(buffer[0], buffer[1], buffer[2], buffer[3],
68 buffer[4], buffer[5] >> PAGE_SHIFT);
69 out:
70 return err;
71 }
72
73 asmlinkage long
sys_mmap2(unsigned long addr,unsigned long len,unsigned long prot,unsigned long flags,unsigned long fd,unsigned long pgoff)74 sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
75 unsigned long flags, unsigned long fd, unsigned long pgoff)
76 {
77 return do_mmap2(addr, len, prot, flags, fd, pgoff);
78 }
79
80 /*
81 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
82 *
83 * This is really horribly ugly. (same as arch/i386)
84 */
85
sys_ipc(uint call,int first,int second,int third,void __user * ptr,long fifth)86 asmlinkage int sys_ipc (uint call, int first, int second,
87 int third, void __user *ptr, long fifth)
88 {
89 int version, ret;
90
91 version = call >> 16; /* hack for backward compatibility */
92 call &= 0xffff;
93
94 switch (call) {
95 case SEMOP:
96 return sys_semtimedop (first, (struct sembuf __user *)ptr, second, NULL);
97 case SEMTIMEDOP:
98 return sys_semtimedop(first, (struct sembuf __user *)ptr, second,
99 (const struct timespec __user *)fifth);
100
101 case SEMGET:
102 return sys_semget (first, second, third);
103 case SEMCTL: {
104 union semun fourth;
105 if (!ptr)
106 return -EINVAL;
107 if (get_user(fourth.__pad, (void * __user *) ptr))
108 return -EFAULT;
109 return sys_semctl (first, second, third, fourth);
110 }
111
112 case MSGSND:
113 return sys_msgsnd (first, (struct msgbuf __user *) ptr,
114 second, third);
115 case MSGRCV:
116 switch (version) {
117 case 0: {
118 struct ipc_kludge tmp;
119 if (!ptr)
120 return -EINVAL;
121
122 if (copy_from_user(&tmp,
123 (struct ipc_kludge __user *) ptr,
124 sizeof (tmp)))
125 return -EFAULT;
126 return sys_msgrcv (first, tmp.msgp, second,
127 tmp.msgtyp, third);
128 }
129 default:
130 return sys_msgrcv (first,
131 (struct msgbuf __user *) ptr,
132 second, fifth, third);
133 }
134 case MSGGET:
135 return sys_msgget ((key_t) first, second);
136 case MSGCTL:
137 return sys_msgctl (first, second, (struct msqid_ds __user *) ptr);
138
139 case SHMAT: {
140 ulong raddr;
141 ret = do_shmat (first, (char __user *) ptr, second, &raddr);
142 if (ret)
143 return ret;
144 return put_user (raddr, (ulong __user *) third);
145 }
146 case SHMDT:
147 return sys_shmdt ((char __user *)ptr);
148 case SHMGET:
149 return sys_shmget (first, second, third);
150 case SHMCTL:
151 return sys_shmctl (first, second,
152 (struct shmid_ds __user *) ptr);
153 default:
154 return -ENOSYS;
155 }
156 }
157