[deliverable/linux.git] / arch / mn10300 / kernel / sys_mn10300.c

/* MN10300 Weird system calls
 *
 * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/syscalls.h>
#include <linux/mm.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/tty.h>

#include <asm/uaccess.h>

/*
 * memory mapping syscall
 */
asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
			  unsigned long prot, unsigned long flags,
			  unsigned long fd, unsigned long pgoff)
{
	struct file *file = NULL;
	long error = -EINVAL;

	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);

	error = -EBADF;
	if (!(flags & MAP_ANONYMOUS)) {
		file = fget(fd);
		if (!file)
			goto out;
	}

	down_write(&current->mm->mmap_sem);
	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
	up_write(&current->mm->mmap_sem);

	if (file)
		fput(file);
out:
	return error;
}

asmlinkage long old_mmap(unsigned long addr, unsigned long len,
			 unsigned long prot, unsigned long flags,
			 unsigned long fd, unsigned long offset)
{
	if (offset & ~PAGE_MASK)
		return -EINVAL;
	return sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
}

struct sel_arg_struct {
	unsigned long n;
	fd_set *inp;
	fd_set *outp;
	fd_set *exp;
	struct timeval *tvp;
};

asmlinkage int old_select(struct sel_arg_struct __user *arg)
{
	struct sel_arg_struct a;

	if (copy_from_user(&a, arg, sizeof(a)))
		return -EFAULT;
	/* sys_select() does the appropriate kernel locking */
	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
}

/*
 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
 *
 * This is really horribly ugly.
 */
asmlinkage long sys_ipc(uint call, int first, int second,
			int third, void __user *ptr, 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 * __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 *) third);
		}
		case 1:	/* iBCS2 emulator entry point */
			if (!segment_eq(get_fs(), get_ds()))
				return -EINVAL;
			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 -EINVAL;
	}
}
Commit	Line	Data
b920de1b DH	1	/* MN10300 Weird system calls
	2	*
	3	* Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
	4	* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public Licence
	8	* as published by the Free Software Foundation; either version
	9	* 2 of the Licence, or (at your option) any later version.
	10	*/
	11	#include <linux/errno.h>
	12	#include <linux/sched.h>
	13	#include <linux/syscalls.h>
	14	#include <linux/mm.h>
	15	#include <linux/smp.h>
b920de1b DH	16	#include <linux/sem.h>
	17	#include <linux/msg.h>
	18	#include <linux/shm.h>
	19	#include <linux/stat.h>
	20	#include <linux/mman.h>
	21	#include <linux/file.h>
b920de1b DH	22	#include <linux/tty.h>
	23
	24	#include <asm/uaccess.h>
	25
b920de1b DH	26	/*
	27	* memory mapping syscall
	28	*/
	29	asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
	30	unsigned long prot, unsigned long flags,
	31	unsigned long fd, unsigned long pgoff)
	32	{
	33	struct file *file = NULL;
	34	long error = -EINVAL;
	35
	36	flags &= ~(MAP_EXECUTABLE \| MAP_DENYWRITE);
	37
b920de1b DH	38	error = -EBADF;
	39	if (!(flags & MAP_ANONYMOUS)) {
	40	file = fget(fd);
	41	if (!file)
	42	goto out;
	43	}
	44
	45	down_write(&current->mm->mmap_sem);
	46	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
	47	up_write(&current->mm->mmap_sem);
	48
	49	if (file)
	50	fput(file);
	51	out:
	52	return error;
	53	}
	54
	55	asmlinkage long old_mmap(unsigned long addr, unsigned long len,
	56	unsigned long prot, unsigned long flags,
	57	unsigned long fd, unsigned long offset)
	58	{
	59	if (offset & ~PAGE_MASK)
	60	return -EINVAL;
	61	return sys_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
	62	}
	63
	64	struct sel_arg_struct {
	65	unsigned long n;
	66	fd_set *inp;
	67	fd_set *outp;
	68	fd_set *exp;
	69	struct timeval *tvp;
	70	};
	71
	72	asmlinkage int old_select(struct sel_arg_struct __user *arg)
	73	{
	74	struct sel_arg_struct a;
	75
	76	if (copy_from_user(&a, arg, sizeof(a)))
	77	return -EFAULT;
	78	/* sys_select() does the appropriate kernel locking */
	79	return sys_select(a.n, a.inp, a.outp, a.exp, a.tvp);
	80	}
	81
	82	/*
	83	* sys_ipc() is the de-multiplexer for the SysV IPC calls..
	84	*
	85	* This is really horribly ugly.
	86	*/
	87	asmlinkage long sys_ipc(uint call, int first, int second,
	88	int third, void __user *ptr, long fifth)
	89	{
	90	int version, ret;
	91
	92	version = call >> 16; /* hack for backward compatibility */
	93	call &= 0xffff;
	94
	95	switch (call) {
	96	case SEMOP:
	97	return sys_semtimedop(first, (struct sembuf __user *)ptr,
	98	second, NULL);
	99	case SEMTIMEDOP:
	100	return sys_semtimedop(first, (struct sembuf __user *)ptr,
	101	second,
102	(const struct timespec __user *)fifth);
103	case SEMGET:
104	return sys_semget(first, second, third);
105	case SEMCTL: {
106	union semun fourth;
107	if (!ptr)
108	return -EINVAL;
109	if (get_user(fourth.__pad, (void __user * __user *) ptr))
110	return -EFAULT;
111	return sys_semctl(first, second, third, fourth);
112	}
113
114	case MSGSND:
115	return sys_msgsnd(first, (struct msgbuf __user *) ptr,
116	second, third);
117	case MSGRCV:
118	switch (version) {
119	case 0: {
120	struct ipc_kludge tmp;
121	if (!ptr)
122	return -EINVAL;
123
124	if (copy_from_user(&tmp,
125	(struct ipc_kludge __user *) ptr,
126	sizeof(tmp)))
127	return -EFAULT;
128	return sys_msgrcv(first, tmp.msgp, second,
129	tmp.msgtyp, third);
130	}
131	default:
132	return sys_msgrcv(first,
133	(struct msgbuf __user *) ptr,
134	second, fifth, third);
135	}
136	case MSGGET:
137	return sys_msgget((key_t) first, second);
138	case MSGCTL:
139	return sys_msgctl(first, second,
140	(struct msqid_ds __user *) ptr);
141
142	case SHMAT:
143	switch (version) {
144	default: {
145	ulong raddr;
146	ret = do_shmat(first, (char __user *) ptr, second,
147	&raddr);
148	if (ret)
149	return ret;
150	return put_user(raddr, (ulong *) third);
151	}
152	case 1: /* iBCS2 emulator entry point */
153	if (!segment_eq(get_fs(), get_ds()))
154	return -EINVAL;
155	return do_shmat(first, (char __user *) ptr, second,
156	(ulong *) third);
157	}
158	case SHMDT:
159	return sys_shmdt((char __user *)ptr);
160	case SHMGET:
161	return sys_shmget(first, second, third);
162	case SHMCTL:
163	return sys_shmctl(first, second,
164	(struct shmid_ds __user *) ptr);
165	default:
166	return -EINVAL;
167	}
168	}