[GitHub/mt8127/android_kernel_alcatel_ttab.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/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)
{
	return do_mmap2(addr, len, prot, flags, fd, pgoff);
}

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

out:
	return error;
}

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

/*
 * Compacrapability ...
 */
asmlinkage int sys_olduname(struct oldold_utsname * 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 = current->thread_info;

	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, len;
	char	*name;

	switch(cmd) {
	case SETNAME: {
		char nodename[__NEW_UTS_LEN + 1];

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

		name = (char *) arg1;

		len = strncpy_from_user(nodename, name, __NEW_UTS_LEN);
		if (len < 0)
			return -EFAULT;

		down_write(&uts_sem);
		strncpy(system_utsname.nodename, nodename, len);
		nodename[__NEW_UTS_LEN] = '\0';
		strlcpy(system_utsname.nodename, nodename,
		        sizeof(system_utsname.nodename));
		up_write(&uts_sem);
		return 0;
	}

	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;

	case MIPS_RDNVRAM:
		return -EIO;
	}

	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 *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 *)ptr, second,
		                       NULL);
	case SEMTIMEDOP:
		return sys_semtimedop (first, (struct sembuf *)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 **) ptr))
			return -EFAULT;
		return sys_semctl (first, second, third, fourth);
	}

	case MSGSND:
		return sys_msgsnd (first, (struct msgbuf *) 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 *) ptr,
					   sizeof (tmp)))
				return -EFAULT;
			return sys_msgrcv (first, tmp.msgp, second,
					   tmp.msgtyp, third);
		}
		default:
			return sys_msgrcv (first,
					   (struct msgbuf *) ptr,
					   second, fifth, third);
		}
	case MSGGET:
		return sys_msgget ((key_t) first, second);
	case MSGCTL:
		return sys_msgctl (first, second, (struct msqid_ds *) ptr);

	case SHMAT:
		switch (version) {
		default: {
			ulong raddr;
			ret = do_shmat (first, (char *) 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 *) ptr, second, (ulong *) third);
		}
	case SHMDT:
		return sys_shmdt ((char *)ptr);
	case SHMGET:
		return sys_shmget (first, second, third);
	case SHMCTL:
		return sys_shmctl (first, second,
				   (struct shmid_ds *) 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 LT	11	#include <linux/a.out.h>
	12	#include <linux/errno.h>
	13	#include <linux/linkage.h>
	14	#include <linux/mm.h>
	15	#include <linux/smp.h>
	16	#include <linux/smp_lock.h>
	17	#include <linux/mman.h>
	18	#include <linux/ptrace.h>
	19	#include <linux/sched.h>
	20	#include <linux/string.h>
	21	#include <linux/syscalls.h>
	22	#include <linux/file.h>
	23	#include <linux/slab.h>
	24	#include <linux/utsname.h>
	25	#include <linux/unistd.h>
	26	#include <linux/sem.h>
	27	#include <linux/msg.h>
	28	#include <linux/shm.h>
	29	#include <linux/compiler.h>
9ff77c46	30	#include <linux/module.h>
1da177e4 LT	31
	32	#include <asm/branch.h>
	33	#include <asm/cachectl.h>
	34	#include <asm/cacheflush.h>
	35	#include <asm/ipc.h>
048eb582	36	#include <asm/asm-offsets.h>
1da177e4 LT	37	#include <asm/signal.h>
	38	#include <asm/sim.h>
	39	#include <asm/shmparam.h>
	40	#include <asm/sysmips.h>
	41	#include <asm/uaccess.h>
	42
	43	asmlinkage int sys_pipe(nabi_no_regargs volatile struct pt_regs regs)
	44	{
	45	int fd[2];
	46	int error, res;
	47
	48	error = do_pipe(fd);
	49	if (error) {
	50	res = error;
	51	goto out;
	52	}
	53	regs.regs[3] = fd[1];
	54	res = fd[0];
	55	out:
	56	return res;
	57	}
	58
	59	unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */
	60
9ff77c46 RB	61	EXPORT_SYMBOL(shm_align_mask);
9ff77c46 RB	62
1da177e4 LT	63	#define COLOUR_ALIGN(addr,pgoff) \
	64	((((addr) + shm_align_mask) & ~shm_align_mask) + \
	65	(((pgoff) << PAGE_SHIFT) & shm_align_mask))
	66
	67	unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
	68	unsigned long len, unsigned long pgoff, unsigned long flags)
	69	{
	70	struct vm_area_struct * vmm;
	71	int do_color_align;
	72	unsigned long task_size;
	73
	74	task_size = STACK_TOP;
	75
	76	if (flags & MAP_FIXED) {
	77	/*
	78	* We do not accept a shared mapping if it would violate
	79	* cache aliasing constraints.
	80	*/
	81	if ((flags & MAP_SHARED) && (addr & shm_align_mask))
	82	return -EINVAL;
	83	return addr;
	84	}
	85
	86	if (len > task_size)
	87	return -ENOMEM;
	88	do_color_align = 0;
	89	if (filp \|\| (flags & MAP_SHARED))
	90	do_color_align = 1;
	91	if (addr) {
	92	if (do_color_align)
	93	addr = COLOUR_ALIGN(addr, pgoff);
	94	else
	95	addr = PAGE_ALIGN(addr);
	96	vmm = find_vma(current->mm, addr);
	97	if (task_size - len >= addr &&
	98	(!vmm \|\| addr + len <= vmm->vm_start))
	99	return addr;
	100	}
	101	addr = TASK_UNMAPPED_BASE;
	102	if (do_color_align)
	103	addr = COLOUR_ALIGN(addr, pgoff);
	104	else
	105	addr = PAGE_ALIGN(addr);
	106
	107	for (vmm = find_vma(current->mm, addr); ; vmm = vmm->vm_next) {
	108	/* At this point: (!vmm \|\| addr < vmm->vm_end). */
	109	if (task_size - len < addr)
	110	return -ENOMEM;
	111	if (!vmm \|\| addr + len <= vmm->vm_start)
	112	return addr;
	113	addr = vmm->vm_end;
	114	if (do_color_align)
	115	addr = COLOUR_ALIGN(addr, pgoff);
	116	}
	117	}
	118
	119	/* common code for old and new mmaps */
	120	static inline unsigned long
	121	do_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
	122	unsigned long flags, unsigned long fd, unsigned long pgoff)
	123	{
	124	unsigned long error = -EBADF;
	125	struct file * file = NULL;
	126
127	flags &= ~(MAP_EXECUTABLE \| MAP_DENYWRITE);
128	if (!(flags & MAP_ANONYMOUS)) {
129	file = fget(fd);
130	if (!file)
131	goto out;
132	}
133
134	down_write(&current->mm->mmap_sem);
135	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
136	up_write(&current->mm->mmap_sem);
137
138	if (file)
139	fput(file);
140	out:
141	return error;
142	}
143
144	asmlinkage unsigned long
145	old_mmap(unsigned long addr, unsigned long len, int prot,
146	int flags, int fd, off_t offset)
147	{
148	unsigned long result;
149
150	result = -EINVAL;
151	if (offset & ~PAGE_MASK)
152	goto out;
153
154	result = do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
155
156	out:
157	return result;
158	}
159
160	asmlinkage unsigned long
161	sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
162	unsigned long flags, unsigned long fd, unsigned long pgoff)
163	{
164	return do_mmap2(addr, len, prot, flags, fd, pgoff);
165	}
166
167	save_static_function(sys_fork);
168	__attribute_used__ noinline static int
169	_sys_fork(nabi_no_regargs struct pt_regs regs)
170	{
171	return do_fork(SIGCHLD, regs.regs[29], &regs, 0, NULL, NULL);
172	}
173
174	save_static_function(sys_clone);
175	__attribute_used__ noinline static int
176	_sys_clone(nabi_no_regargs struct pt_regs regs)
177	{
178	unsigned long clone_flags;
179	unsigned long newsp;
3c37026d	180	int __user parent_tidptr, child_tidptr;
1da177e4 LT	181
	182	clone_flags = regs.regs[4];
	183	newsp = regs.regs[5];
	184	if (!newsp)
	185	newsp = regs.regs[29];
3c37026d RB	186	parent_tidptr = (int __user *) regs.regs[6];
	187	#ifdef CONFIG_32BIT
	188	/* We need to fetch the fifth argument off the stack. */
	189	child_tidptr = NULL;
	190	if (clone_flags & (CLONE_CHILD_SETTID \| CLONE_CHILD_CLEARTID)) {
	191	int __user __user usp = (int __user __user ) regs.regs[29];
	192	if (regs.regs[2] == __NR_syscall) {
	193	if (get_user (child_tidptr, &usp[5]))
	194	return -EFAULT;
	195	}
	196	else if (get_user (child_tidptr, &usp[4]))
	197	return -EFAULT;
	198	}
	199	#else
	200	child_tidptr = (int __user *) regs.regs[8];
	201	#endif
1da177e4 LT	202	return do_fork(clone_flags, newsp, &regs, 0,
	203	parent_tidptr, child_tidptr);
	204	}
	205
	206	/*
	207	* sys_execve() executes a new program.
	208	*/
	209	asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
	210	{
	211	int error;
	212	char * filename;
	213
	214	filename = getname((char *) (long)regs.regs[4]);
	215	error = PTR_ERR(filename);
	216	if (IS_ERR(filename))
	217	goto out;
	218	error = do_execve(filename, (char **) (long)regs.regs[5],
	219	(char **) (long)regs.regs[6], &regs);
	220	putname(filename);
	221
	222	out:
	223	return error;
	224	}
	225
	226	/*
	227	* Compacrapability ...
	228	*/
	229	asmlinkage int sys_uname(struct old_utsname * name)
	230	{
	231	if (name && !copy_to_user(name, &system_utsname, sizeof (*name)))
	232	return 0;
	233	return -EFAULT;
	234	}
	235
	236	/*
	237	* Compacrapability ...
	238	*/
	239	asmlinkage int sys_olduname(struct oldold_utsname * name)
	240	{
	241	int error;
	242
	243	if (!name)
	244	return -EFAULT;
	245	if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
	246	return -EFAULT;
	247
	248	error = __copy_to_user(&name->sysname,&system_utsname.sysname,__OLD_UTS_LEN);
	249	error -= __put_user(0,name->sysname+__OLD_UTS_LEN);
	250	error -= __copy_to_user(&name->nodename,&system_utsname.nodename,__OLD_UTS_LEN);
	251	error -= __put_user(0,name->nodename+__OLD_UTS_LEN);
	252	error -= __copy_to_user(&name->release,&system_utsname.release,__OLD_UTS_LEN);
	253	error -= __put_user(0,name->release+__OLD_UTS_LEN);
	254	error -= __copy_to_user(&name->version,&system_utsname.version,__OLD_UTS_LEN);
	255	error -= __put_user(0,name->version+__OLD_UTS_LEN);
	256	error -= __copy_to_user(&name->machine,&system_utsname.machine,__OLD_UTS_LEN);
	257	error = __put_user(0,name->machine+__OLD_UTS_LEN);
	258	error = error ? -EFAULT : 0;
	259
	260	return error;
	261	}
	262
3c37026d RB	263	void sys_set_thread_area(unsigned long addr)
	264	{
	265	struct thread_info *ti = current->thread_info;
	266
	267	ti->tp_value = addr;
	268
	269	/* If some future MIPS implementation has this register in hardware,
	270	* we will need to update it here (and in context switches). */
	271	}
	272
1da177e4 LT	273	asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
	274	{
	275	int tmp, len;
	276	char *name;
	277
	278	switch(cmd) {
	279	case SETNAME: {
	280	char nodename[__NEW_UTS_LEN + 1];
	281
	282	if (!capable(CAP_SYS_ADMIN))
	283	return -EPERM;
	284
	285	name = (char *) arg1;
	286
	287	len = strncpy_from_user(nodename, name, __NEW_UTS_LEN);
	288	if (len < 0)
	289	return -EFAULT;
	290
	291	down_write(&uts_sem);
	292	strncpy(system_utsname.nodename, nodename, len);
	293	nodename[__NEW_UTS_LEN] = '\0';
	294	strlcpy(system_utsname.nodename, nodename,
	295	sizeof(system_utsname.nodename));
	296	up_write(&uts_sem);
	297	return 0;
	298	}
	299
	300	case MIPS_ATOMIC_SET:
	301	printk(KERN_CRIT "How did I get here?\n");
	302	return -EINVAL;
	303
	304	case MIPS_FIXADE:
	305	tmp = current->thread.mflags & ~3;
	306	current->thread.mflags = tmp \| (arg1 & 3);
	307	return 0;
	308
	309	case FLUSH_CACHE:
	310	__flush_cache_all();
	311	return 0;
	312
	313	case MIPS_RDNVRAM:
	314	return -EIO;
	315	}
	316
	317	return -EINVAL;
	318	}
	319
	320	/*
	321	* sys_ipc() is the de-multiplexer for the SysV IPC calls..
	322	*
	323	* This is really horribly ugly.
	324	*/
	325	asmlinkage int sys_ipc (uint call, int first, int second,
	326	unsigned long third, void *ptr, long fifth)
	327	{
	328	int version, ret;
	329
	330	version = call >> 16; /* hack for backward compatibility */
	331	call &= 0xffff;
	332
	333	switch (call) {
	334	case SEMOP:
	335	return sys_semtimedop (first, (struct sembuf *)ptr, second,
	336	NULL);
337	case SEMTIMEDOP:
338	return sys_semtimedop (first, (struct sembuf *)ptr, second,
339	(const struct timespec __user *)fifth);
340	case SEMGET:
341	return sys_semget (first, second, third);
342	case SEMCTL: {
343	union semun fourth;
344	if (!ptr)
345	return -EINVAL;
346	if (get_user(fourth.__pad, (void **) ptr))
347	return -EFAULT;
348	return sys_semctl (first, second, third, fourth);
349	}
350
351	case MSGSND:
352	return sys_msgsnd (first, (struct msgbuf *) ptr,
353	second, third);
354	case MSGRCV:
355	switch (version) {
356	case 0: {
357	struct ipc_kludge tmp;
358	if (!ptr)
359	return -EINVAL;
360
361	if (copy_from_user(&tmp,
362	(struct ipc_kludge *) ptr,
363	sizeof (tmp)))
364	return -EFAULT;
365	return sys_msgrcv (first, tmp.msgp, second,
366	tmp.msgtyp, third);
367	}
368	default:
369	return sys_msgrcv (first,
370	(struct msgbuf *) ptr,
371	second, fifth, third);
372	}
373	case MSGGET:
374	return sys_msgget ((key_t) first, second);
375	case MSGCTL:
376	return sys_msgctl (first, second, (struct msqid_ds *) ptr);
377
378	case SHMAT:
379	switch (version) {
380	default: {
381	ulong raddr;
382	ret = do_shmat (first, (char *) ptr, second, &raddr);
383	if (ret)
384	return ret;
385	return put_user (raddr, (ulong *) third);
386	}
387	case 1: /* iBCS2 emulator entry point */
388	if (!segment_eq(get_fs(), get_ds()))
389	return -EINVAL;
390	return do_shmat (first, (char ) ptr, second, (ulong ) third);
391	}
392	case SHMDT:
393	return sys_shmdt ((char *)ptr);
394	case SHMGET:
395	return sys_shmget (first, second, third);
396	case SHMCTL:
397	return sys_shmctl (first, second,
398	(struct shmid_ds *) ptr);
399	default:
400	return -ENOSYS;
401	}
402	}
403
1da177e4 LT	404	/*
	405	* No implemented yet ...
	406	*/
	407	asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
	408	{
	409	return -ENOSYS;
	410	}
	411
	412	/*
	413	* If we ever come here the user sp is bad. Zap the process right away.
	414	* Due to the bad stack signaling wouldn't work.
	415	*/
	416	asmlinkage void bad_stack(void)
	417	{
	418	do_exit(SIGSEGV);
	419	}