f8b7256096
New helper - sys_mmap_pgoff(); switch syscalls to using it. Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
134 lines
3.5 KiB
C
134 lines
3.5 KiB
C
/* sys_frv.c: FRV arch-specific syscall wrappers
|
|
*
|
|
* Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
* - Derived from arch/m68k/kernel/sys_m68k.c
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/sem.h>
|
|
#include <linux/msg.h>
|
|
#include <linux/shm.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/file.h>
|
|
#include <linux/syscalls.h>
|
|
#include <linux/ipc.h>
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
|
|
unsigned long prot, unsigned long flags,
|
|
unsigned long fd, unsigned long pgoff)
|
|
{
|
|
/* As with sparc32, make sure the shift for mmap2 is constant
|
|
(12), no matter what PAGE_SIZE we have.... */
|
|
|
|
/* But unlike sparc32, don't just silently break if we're
|
|
trying to map something we can't */
|
|
if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1))
|
|
return -EINVAL;
|
|
|
|
return sys_mmap_pgoff(addr, len, prot, flags, fd,
|
|
pgoff >> (PAGE_SHIFT - 12));
|
|
}
|
|
|
|
/*
|
|
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
|
|
*
|
|
* This is really horribly ugly.
|
|
*/
|
|
asmlinkage long sys_ipc(unsigned long call,
|
|
unsigned long first,
|
|
unsigned long second,
|
|
unsigned long third,
|
|
void __user *ptr,
|
|
unsigned long fifth)
|
|
{
|
|
int version, ret;
|
|
|
|
version = call >> 16; /* hack for backward compatibility */
|
|
call &= 0xffff;
|
|
|
|
switch (call) {
|
|
case SEMOP:
|
|
return sys_semtimedop(first, (struct sembuf __user *)ptr, second, NULL);
|
|
case SEMTIMEDOP:
|
|
return sys_semtimedop(first, (struct sembuf __user *)ptr, second,
|
|
(const struct timespec __user *)fifth);
|
|
|
|
case SEMGET:
|
|
return sys_semget (first, second, third);
|
|
case SEMCTL: {
|
|
union semun fourth;
|
|
if (!ptr)
|
|
return -EINVAL;
|
|
if (get_user(fourth.__pad, (void * __user *) ptr))
|
|
return -EFAULT;
|
|
return sys_semctl (first, second, third, fourth);
|
|
}
|
|
|
|
case MSGSND:
|
|
return sys_msgsnd (first, (struct msgbuf __user *) ptr,
|
|
second, third);
|
|
case MSGRCV:
|
|
switch (version) {
|
|
case 0: {
|
|
struct ipc_kludge tmp;
|
|
if (!ptr)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&tmp,
|
|
(struct ipc_kludge __user *) ptr,
|
|
sizeof (tmp)))
|
|
return -EFAULT;
|
|
return sys_msgrcv (first, tmp.msgp, second,
|
|
tmp.msgtyp, third);
|
|
}
|
|
default:
|
|
return sys_msgrcv (first,
|
|
(struct msgbuf __user *) ptr,
|
|
second, fifth, third);
|
|
}
|
|
case MSGGET:
|
|
return sys_msgget ((key_t) first, second);
|
|
case MSGCTL:
|
|
return sys_msgctl (first, second, (struct msqid_ds __user *) ptr);
|
|
|
|
case SHMAT:
|
|
switch (version) {
|
|
default: {
|
|
ulong raddr;
|
|
ret = do_shmat (first, (char __user *) ptr, second, &raddr);
|
|
if (ret)
|
|
return ret;
|
|
return put_user (raddr, (ulong __user *) third);
|
|
}
|
|
case 1: /* iBCS2 emulator entry point */
|
|
if (!segment_eq(get_fs(), get_ds()))
|
|
return -EINVAL;
|
|
/* The "(ulong *) third" is valid _only_ because of the kernel segment thing */
|
|
return do_shmat (first, (char __user *) ptr, second, (ulong *) third);
|
|
}
|
|
case SHMDT:
|
|
return sys_shmdt ((char __user *)ptr);
|
|
case SHMGET:
|
|
return sys_shmget (first, second, third);
|
|
case SHMCTL:
|
|
return sys_shmctl (first, second,
|
|
(struct shmid_ds __user *) ptr);
|
|
default:
|
|
return -ENOSYS;
|
|
}
|
|
}
|