[linux-2.6-block.git] / arch / mips / kernel / syscall.c

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1995, 1996, 1997, 2000, 2001, 05 by Ralf Baechle
 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
 * Copyright (C) 2001 MIPS Technologies, Inc.
 */
#include <linux/config.h>
#include <linux/a.out.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/linkage.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/mman.h>
#include <linux/ptrace.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/syscalls.h>
#include <linux/file.h>
#include <linux/slab.h>
#include <linux/utsname.h>
#include <linux/unistd.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/compiler.h>
#include <linux/module.h>

#include <asm/branch.h>
#include <asm/cachectl.h>
#include <asm/cacheflush.h>
#include <asm/ipc.h>
#include <asm/asm-offsets.h>
#include <asm/signal.h>
#include <asm/sim.h>
#include <asm/shmparam.h>
#include <asm/sysmips.h>
#include <asm/uaccess.h>

asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs)
{
	int fd[2];
	int error, res;

	error = do_pipe(fd);
	if (error) {
		res = error;
		goto out;
	}
	regs.regs[3] = fd[1];
	res = fd[0];
out:
	return res;
}

unsigned long shm_align_mask = PAGE_SIZE - 1;	/* Sane caches */

EXPORT_SYMBOL(shm_align_mask);

#define COLOUR_ALIGN(addr,pgoff)				\
	((((addr) + shm_align_mask) & ~shm_align_mask) +	\
	 (((pgoff) << PAGE_SHIFT) & shm_align_mask))

unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
	unsigned long len, unsigned long pgoff, unsigned long flags)
{
	struct vm_area_struct * vmm;
	int do_color_align;
	unsigned long task_size;

	task_size = STACK_TOP;

	if (flags & MAP_FIXED) {
		/*
		 * We do not accept a shared mapping if it would violate
		 * cache aliasing constraints.
		 */
		if ((flags & MAP_SHARED) && (addr & shm_align_mask))
			return -EINVAL;
		return addr;
	}

	if (len > task_size)
		return -ENOMEM;
	do_color_align = 0;
	if (filp || (flags & MAP_SHARED))
		do_color_align = 1;
	if (addr) {
		if (do_color_align)
			addr = COLOUR_ALIGN(addr, pgoff);
		else
			addr = PAGE_ALIGN(addr);
		vmm = find_vma(current->mm, addr);
		if (task_size - len >= addr &&
		    (!vmm || addr + len <= vmm->vm_start))
			return addr;
	}
	addr = TASK_UNMAPPED_BASE;
	if (do_color_align)
		addr = COLOUR_ALIGN(addr, pgoff);
	else
		addr = PAGE_ALIGN(addr);

	for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
		/* At this point:  (!vmm || addr < vmm->vm_end). */
		if (task_size - len < addr)
			return -ENOMEM;
		if (!vmm || addr + len <= vmm->vm_start)
			return addr;
		addr = vmm->vm_end;
		if (do_color_align)
			addr = COLOUR_ALIGN(addr, pgoff);
	}
}

/* common code for old and new mmaps */
static inline unsigned long
do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
        unsigned long flags, unsigned long fd, unsigned long pgoff)
{
	unsigned long error = -EBADF;
	struct file * file = NULL;

	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
	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 unsigned long
old_mmap(unsigned long addr, unsigned long len, int prot,
	int flags, int fd, off_t offset)
{
	unsigned long result;

	result = -EINVAL;
	if (offset & ~PAGE_MASK)
		goto out;

	result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);

out:
	return result;
}

asmlinkage unsigned long
sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
          unsigned long flags, unsigned long fd, unsigned long pgoff)
{
	if (pgoff & (~PAGE_MASK >> 12))
		return -EINVAL;

	return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
}

save_static_function(sys_fork);
__attribute_used__ noinline static int
_sys_fork(nabi_no_regargs struct pt_regs regs)
{
	return do_fork(SIGCHLD, regs.regs[29], &regs, 0, NULL, NULL);
}

save_static_function(sys_clone);
__attribute_used__ noinline static int
_sys_clone(nabi_no_regargs struct pt_regs regs)
{
	unsigned long clone_flags;
	unsigned long newsp;
	int __user *parent_tidptr, *child_tidptr;

	clone_flags = regs.regs[4];
	newsp = regs.regs[5];
	if (!newsp)
		newsp = regs.regs[29];
	parent_tidptr = (int __user *) regs.regs[6];
#ifdef CONFIG_32BIT
	/* We need to fetch the fifth argument off the stack.  */
	child_tidptr = NULL;
	if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
		int __user *__user *usp = (int __user *__user *) regs.regs[29];
		if (regs.regs[2] == __NR_syscall) {
			if (get_user (child_tidptr, &usp[5]))
				return -EFAULT;
		}
		else if (get_user (child_tidptr, &usp[4]))
			return -EFAULT;
	}
#else
	child_tidptr = (int __user *) regs.regs[8];
#endif
	return do_fork(clone_flags, newsp, &regs, 0,
	               parent_tidptr, child_tidptr);
}

/*
 * sys_execve() executes a new program.
 */
asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
{
	int error;
	char * filename;

	filename = getname((char __user *) (long)regs.regs[4]);
	error = PTR_ERR(filename);
	if (IS_ERR(filename))
		goto out;
	error = do_execve(filename, (char __user *__user *) (long)regs.regs[5],
	                  (char __user *__user *) (long)regs.regs[6], &regs);
	putname(filename);

out:
	return error;
}

/*
 * Compacrapability ...
 */
asmlinkage int sys_uname(struct old_utsname __user * name)
{
	if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
		return 0;
	return -EFAULT;
}

/*
 * Compacrapability ...
 */
asmlinkage int sys_olduname(struct oldold_utsname __user * name)
{
	int error;

	if (!name)
		return -EFAULT;
	if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
		return -EFAULT;

	error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
	error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
	error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
	error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
	error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
	error -= __put_user(0,name->release+__OLD_UTS_LEN);
	error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
	error -= __put_user(0,name->version+__OLD_UTS_LEN);
	error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
	error = __put_user(0,name->machine+__OLD_UTS_LEN);
	error = error ? -EFAULT : 0;

	return error;
}

void sys_set_thread_area(unsigned long addr)
{
	struct thread_info *ti = task_thread_info(current);

	ti->tp_value = addr;

	/* If some future MIPS implementation has this register in hardware,
	 * we will need to update it here (and in context switches).  */
}

asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
{
	int	tmp;

	switch(cmd) {
	case MIPS_ATOMIC_SET:
		printk(KERN_CRIT "How did I get here?\n");
		return -EINVAL;

	case MIPS_FIXADE:
		tmp = current->thread.mflags & ~3;
		current->thread.mflags = tmp | (arg1 & 3);
		return 0;

	case FLUSH_CACHE:
		__flush_cache_all();
		return 0;
	}

	return -EINVAL;
}

/*
 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
 *
 * This is really horribly ugly.
 */
asmlinkage int sys_ipc (uint call, int first, int second,
			unsigned long 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 __user *) 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 -ENOSYS;
	}
}

/*
 * No implemented yet ...
 */
asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
{
	return -ENOSYS;
}

/*
 * If we ever come here the user sp is bad.  Zap the process right away.
 * Due to the bad stack signaling wouldn't work.
 */
asmlinkage void bad_stack(void)
{
	do_exit(SIGSEGV);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (C) 1995, 1996, 1997, 2000, 2001, 05 by Ralf Baechle
	7	* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
	8	* Copyright (C) 2001 MIPS Technologies, Inc.
	9	*/
3c37026d	10	#include <linux/config.h>
1da177e4	11	#include <linux/a.out.h>
a9415644	12	#include <linux/capability.h>
1da177e4 LT	13	#include <linux/errno.h>
	14	#include <linux/linkage.h>
	15	#include <linux/mm.h>
	16	#include <linux/smp.h>
	17	#include <linux/smp_lock.h>
	18	#include <linux/mman.h>
	19	#include <linux/ptrace.h>
	20	#include <linux/sched.h>
	21	#include <linux/string.h>
	22	#include <linux/syscalls.h>
	23	#include <linux/file.h>
	24	#include <linux/slab.h>
	25	#include <linux/utsname.h>
	26	#include <linux/unistd.h>
	27	#include <linux/sem.h>
	28	#include <linux/msg.h>
	29	#include <linux/shm.h>
	30	#include <linux/compiler.h>
9ff77c46	31	#include <linux/module.h>
1da177e4 LT	32
	33	#include <asm/branch.h>
	34	#include <asm/cachectl.h>
	35	#include <asm/cacheflush.h>
	36	#include <asm/ipc.h>
048eb582	37	#include <asm/asm-offsets.h>
1da177e4 LT	38	#include <asm/signal.h>
	39	#include <asm/sim.h>
	40	#include <asm/shmparam.h>
	41	#include <asm/sysmips.h>
	42	#include <asm/uaccess.h>
	43
	44	asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs)
	45	{
	46	int fd[2];
	47	int error, res;
	48
	49	error = do_pipe(fd);
	50	if (error) {
	51	res = error;
	52	goto out;
	53	}
	54	regs.regs[3] = fd[1];
	55	res = fd[0];
	56	out:
	57	return res;
	58	}
	59
	60	unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */
	61
9ff77c46 RB	62	EXPORT_SYMBOL(shm_align_mask);
9ff77c46 RB	63
1da177e4 LT	64	#define COLOUR_ALIGN(addr,pgoff) \
	65	((((addr) + shm_align_mask) & ~shm_align_mask) + \
	66	(((pgoff) << PAGE_SHIFT) & shm_align_mask))
	67
	68	unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
	69	unsigned long len, unsigned long pgoff, unsigned long flags)
	70	{
	71	struct vm_area_struct * vmm;
	72	int do_color_align;
	73	unsigned long task_size;
	74
	75	task_size = STACK_TOP;
	76
	77	if (flags & MAP_FIXED) {
	78	/*
	79	* We do not accept a shared mapping if it would violate
	80	* cache aliasing constraints.
	81	*/
	82	if ((flags & MAP_SHARED) && (addr & shm_align_mask))
	83	return -EINVAL;
	84	return addr;
	85	}
	86
	87	if (len > task_size)
	88	return -ENOMEM;
	89	do_color_align = 0;
	90	if (filp \|\| (flags & MAP_SHARED))
	91	do_color_align = 1;
	92	if (addr) {
	93	if (do_color_align)
	94	addr = COLOUR_ALIGN(addr, pgoff);
	95	else
	96	addr = PAGE_ALIGN(addr);
	97	vmm = find_vma(current->mm, addr);
	98	if (task_size - len >= addr &&
	99	(!vmm \|\| addr + len <= vmm->vm_start))
	100	return addr;
	101	}
	102	addr = TASK_UNMAPPED_BASE;
	103	if (do_color_align)
	104	addr = COLOUR_ALIGN(addr, pgoff);
	105	else
	106	addr = PAGE_ALIGN(addr);
	107
	108	for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
	109	/* At this point: (!vmm \|\| addr < vmm->vm_end). */
	110	if (task_size - len < addr)
	111	return -ENOMEM;
	112	if (!vmm \|\| addr + len <= vmm->vm_start)
	113	return addr;
	114	addr = vmm->vm_end;
	115	if (do_color_align)
	116	addr = COLOUR_ALIGN(addr, pgoff);
	117	}
	118	}
	119
	120	/* common code for old and new mmaps */
	121	static inline unsigned long
	122	do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
	123	unsigned long flags, unsigned long fd, unsigned long pgoff)
	124	{
	125	unsigned long error = -EBADF;
	126	struct file * file = NULL;
	127
128	flags &= ~(MAP_EXECUTABLE \| MAP_DENYWRITE);
129	if (!(flags & MAP_ANONYMOUS)) {
130	file = fget(fd);
131	if (!file)
132	goto out;
133	}
134
135	down_write(&current->mm->mmap_sem);
136	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
137	up_write(&current->mm->mmap_sem);
138
139	if (file)
140	fput(file);
141	out:
142	return error;
143	}
144
145	asmlinkage unsigned long
146	old_mmap(unsigned long addr, unsigned long len, int prot,
147	int flags, int fd, off_t offset)
148	{
149	unsigned long result;
150
151	result = -EINVAL;
152	if (offset & ~PAGE_MASK)
153	goto out;
154
155	result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
156
157	out:
158	return result;
159	}
160
161	asmlinkage unsigned long
162	sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
163	unsigned long flags, unsigned long fd, unsigned long pgoff)
164	{
947df17c PA	165	if (pgoff & (~PAGE_MASK >> 12))
	166	return -EINVAL;
	167
	168	return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
1da177e4 LT	169	}
	170
	171	save_static_function(sys_fork);
	172	__attribute_used__ noinline static int
	173	_sys_fork(nabi_no_regargs struct pt_regs regs)
	174	{
	175	return do_fork(SIGCHLD, regs.regs[29], &regs, 0, NULL, NULL);
	176	}
	177
	178	save_static_function(sys_clone);
	179	__attribute_used__ noinline static int
	180	_sys_clone(nabi_no_regargs struct pt_regs regs)
	181	{
	182	unsigned long clone_flags;
	183	unsigned long newsp;
3c37026d	184	int __user parent_tidptr, child_tidptr;
1da177e4 LT	185
	186	clone_flags = regs.regs[4];
	187	newsp = regs.regs[5];
	188	if (!newsp)
	189	newsp = regs.regs[29];
3c37026d RB	190	parent_tidptr = (int __user *) regs.regs[6];
	191	#ifdef CONFIG_32BIT
	192	/* We need to fetch the fifth argument off the stack. */
	193	child_tidptr = NULL;
	194	if (clone_flags & (CLONE_CHILD_SETTID \| CLONE_CHILD_CLEARTID)) {
	195	int __user __user usp = (int __user __user ) regs.regs[29];
	196	if (regs.regs[2] == __NR_syscall) {
	197	if (get_user (child_tidptr, &usp[5]))
	198	return -EFAULT;
	199	}
	200	else if (get_user (child_tidptr, &usp[4]))
	201	return -EFAULT;
	202	}
	203	#else
	204	child_tidptr = (int __user *) regs.regs[8];
	205	#endif
1da177e4 LT	206	return do_fork(clone_flags, newsp, &regs, 0,
	207	parent_tidptr, child_tidptr);
	208	}
	209
	210	/*
	211	* sys_execve() executes a new program.
	212	*/
	213	asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
	214	{
	215	int error;
	216	char * filename;
	217
be6e518b	218	filename = getname((char __user *) (long)regs.regs[4]);
1da177e4 LT	219	error = PTR_ERR(filename);
	220	if (IS_ERR(filename))
	221	goto out;
be6e518b AN	222	error = do_execve(filename, (char __user __user ) (long)regs.regs[5],
be6e518b AN	223	(char __user __user ) (long)regs.regs[6], &regs);
1da177e4 LT	224	putname(filename);
	225
	226	out:
	227	return error;
	228	}
	229
	230	/*
	231	* Compacrapability ...
	232	*/
be6e518b	233	asmlinkage int sys_uname(struct old_utsname __user * name)
1da177e4 LT	234	{
	235	if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
	236	return 0;
	237	return -EFAULT;
	238	}
	239
	240	/*
	241	* Compacrapability ...
	242	*/
be6e518b	243	asmlinkage int sys_olduname(struct oldold_utsname __user * name)
1da177e4 LT	244	{
	245	int error;
	246
	247	if (!name)
	248	return -EFAULT;
	249	if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
	250	return -EFAULT;
	251
	252	error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
	253	error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
	254	error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
	255	error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
	256	error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
	257	error -= __put_user(0,name->release+__OLD_UTS_LEN);
	258	error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
	259	error -= __put_user(0,name->version+__OLD_UTS_LEN);
	260	error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
	261	error = __put_user(0,name->machine+__OLD_UTS_LEN);
	262	error = error ? -EFAULT : 0;
	263
	264	return error;
	265	}
	266
3c37026d RB	267	void sys_set_thread_area(unsigned long addr)
3c37026d RB	268	{
dc8f6029	269	struct thread_info *ti = task_thread_info(current);
3c37026d RB	270
	271	ti->tp_value = addr;
	272
	273	/* If some future MIPS implementation has this register in hardware,
	274	* we will need to update it here (and in context switches). */
	275	}
	276
1da177e4 LT	277	asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
1da177e4 LT	278	{
ecf52d3c	279	int tmp;
1da177e4 LT	280
1da177e4 LT	281	switch(cmd) {
1da177e4 LT	282	case MIPS_ATOMIC_SET:
	283	printk(KERN_CRIT "How did I get here?\n");
	284	return -EINVAL;
	285
	286	case MIPS_FIXADE:
	287	tmp = current->thread.mflags & ~3;
	288	current->thread.mflags = tmp \| (arg1 & 3);
	289	return 0;
	290
	291	case FLUSH_CACHE:
	292	__flush_cache_all();
	293	return 0;
1da177e4 LT	294	}
	295
	296	return -EINVAL;
	297	}
	298
	299	/*
	300	* sys_ipc() is the de-multiplexer for the SysV IPC calls..
	301	*
	302	* This is really horribly ugly.
	303	*/
	304	asmlinkage int sys_ipc (uint call, int first, int second,
be6e518b	305	unsigned long third, void __user *ptr, long fifth)
1da177e4 LT	306	{
	307	int version, ret;
	308
	309	version = call >> 16; /* hack for backward compatibility */
	310	call &= 0xffff;
	311
	312	switch (call) {
	313	case SEMOP:
be6e518b AN	314	return sys_semtimedop (first, (struct sembuf __user *)ptr,
be6e518b AN	315	second, NULL);
1da177e4	316	case SEMTIMEDOP:
be6e518b AN	317	return sys_semtimedop (first, (struct sembuf __user *)ptr,
	318	second,
	319	(const struct timespec __user *)fifth);
1da177e4 LT	320	case SEMGET:
	321	return sys_semget (first, second, third);
	322	case SEMCTL: {
	323	union semun fourth;
	324	if (!ptr)
	325	return -EINVAL;
219ac73a	326	if (get_user(fourth.__pad, (void __user __user ) ptr))
1da177e4 LT	327	return -EFAULT;
	328	return sys_semctl (first, second, third, fourth);
	329	}
	330
	331	case MSGSND:
be6e518b	332	return sys_msgsnd (first, (struct msgbuf __user *) ptr,
1da177e4 LT	333	second, third);
	334	case MSGRCV:
	335	switch (version) {
	336	case 0: {
	337	struct ipc_kludge tmp;
	338	if (!ptr)
	339	return -EINVAL;
	340
	341	if (copy_from_user(&tmp,
be6e518b	342	(struct ipc_kludge __user *) ptr,
1da177e4 LT	343	sizeof (tmp)))
	344	return -EFAULT;
	345	return sys_msgrcv (first, tmp.msgp, second,
	346	tmp.msgtyp, third);
	347	}
	348	default:
	349	return sys_msgrcv (first,
be6e518b	350	(struct msgbuf __user *) ptr,
1da177e4 LT	351	second, fifth, third);
	352	}
	353	case MSGGET:
	354	return sys_msgget ((key_t) first, second);
	355	case MSGCTL:
be6e518b AN	356	return sys_msgctl (first, second,
be6e518b AN	357	(struct msqid_ds __user *) ptr);
1da177e4 LT	358
	359	case SHMAT:
	360	switch (version) {
	361	default: {
	362	ulong raddr;
be6e518b AN	363	ret = do_shmat (first, (char __user *) ptr, second,
be6e518b AN	364	&raddr);
1da177e4 LT	365	if (ret)
1da177e4 LT	366	return ret;
be6e518b	367	return put_user (raddr, (ulong __user *) third);
1da177e4 LT	368	}
	369	case 1: /* iBCS2 emulator entry point */
	370	if (!segment_eq(get_fs(), get_ds()))
	371	return -EINVAL;
be6e518b AN	372	return do_shmat (first, (char __user *) ptr, second,
be6e518b AN	373	(ulong *) third);
1da177e4 LT	374	}
1da177e4 LT	375	case SHMDT:
be6e518b	376	return sys_shmdt ((char __user *)ptr);
1da177e4 LT	377	case SHMGET:
	378	return sys_shmget (first, second, third);
	379	case SHMCTL:
	380	return sys_shmctl (first, second,
be6e518b	381	(struct shmid_ds __user *) ptr);
1da177e4 LT	382	default:
	383	return -ENOSYS;
	384	}
	385	}
	386
1da177e4 LT	387	/*
	388	* No implemented yet ...
	389	*/
	390	asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
	391	{
	392	return -ENOSYS;
	393	}
	394
	395	/*
	396	* If we ever come here the user sp is bad. Zap the process right away.
	397	* Due to the bad stack signaling wouldn't work.
	398	*/
	399	asmlinkage void bad_stack(void)
	400	{
	401	do_exit(SIGSEGV);
	402	}