1 /* $Id: sys_cris.c,v 1.6 2004/03/11 11:38:40 starvik Exp $
3 * linux/arch/cris/kernel/sys_cris.c
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.
12 #include <linux/errno.h>
13 #include <linux/sched.h>
14 #include <linux/syscalls.h>
16 #include <linux/smp.h>
17 #include <linux/smp_lock.h>
18 #include <linux/sem.h>
19 #include <linux/msg.h>
20 #include <linux/shm.h>
21 #include <linux/stat.h>
22 #include <linux/mman.h>
23 #include <linux/file.h>
25 #include <asm/uaccess.h>
27 #include <asm/segment.h>
30 * sys_pipe() is the normal C calling standard for creating
31 * a pipe. It's not the way Unix traditionally does this, though.
33 asmlinkage int sys_pipe(unsigned long __user * fildes)
42 if (copy_to_user(fildes, fd, 2*sizeof(int)))
48 /* common code for old and new mmaps */
50 do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
51 unsigned long flags, unsigned long fd, unsigned long pgoff)
54 struct file * file = NULL;
56 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
57 if (!(flags & MAP_ANONYMOUS)) {
63 down_write(¤t->mm->mmap_sem);
64 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
65 up_write(¤t->mm->mmap_sem);
73 asmlinkage unsigned long old_mmap(unsigned long __user *args)
75 unsigned long buffer[6];
78 if (copy_from_user(&buffer, args, sizeof(buffer)))
82 if (buffer[5] & ~PAGE_MASK) /* verify that offset is on page boundary */
85 err = do_mmap2(buffer[0], buffer[1], buffer[2], buffer[3],
86 buffer[4], buffer[5] >> PAGE_SHIFT);
92 sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
93 unsigned long flags, unsigned long fd, unsigned long pgoff)
95 return do_mmap2(addr, len, prot, flags, fd, pgoff);
99 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
101 * This is really horribly ugly. (same as arch/i386)
104 asmlinkage int sys_ipc (uint call, int first, int second,
105 int third, void __user *ptr, long fifth)
109 version = call >> 16; /* hack for backward compatibility */
114 return sys_semtimedop (first, (struct sembuf __user *)ptr, second, NULL);
116 return sys_semtimedop(first, (struct sembuf __user *)ptr, second,
117 (const struct timespec __user *)fifth);
120 return sys_semget (first, second, third);
125 if (get_user(fourth.__pad, (void * __user *) ptr))
127 return sys_semctl (first, second, third, fourth);
131 return sys_msgsnd (first, (struct msgbuf __user *) ptr,
136 struct ipc_kludge tmp;
140 if (copy_from_user(&tmp,
141 (struct ipc_kludge __user *) ptr,
144 return sys_msgrcv (first, tmp.msgp, second,
148 return sys_msgrcv (first,
149 (struct msgbuf __user *) ptr,
150 second, fifth, third);
153 return sys_msgget ((key_t) first, second);
155 return sys_msgctl (first, second, (struct msqid_ds __user *) ptr);
159 ret = do_shmat (first, (char __user *) ptr, second, &raddr);
162 return put_user (raddr, (ulong __user *) third);
165 return sys_shmdt ((char __user *)ptr);
167 return sys_shmget (first, second, third);
169 return sys_shmctl (first, second,
170 (struct shmid_ds __user *) ptr);