[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/a.out.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/linkage.h>
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/smp.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);
static int __used noinline
_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);
static int __used noinline
_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, 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, &utsname()->sysname,
			       __OLD_UTS_LEN);
	error -= __put_user(0, name->sysname + __OLD_UTS_LEN);
	error -= __copy_to_user(&name->nodename, &utsname()->nodename,
				__OLD_UTS_LEN);
	error -= __put_user(0, name->nodename + __OLD_UTS_LEN);
	error -= __copy_to_user(&name->release, &utsname()->release,
				__OLD_UTS_LEN);
	error -= __put_user(0, name->release + __OLD_UTS_LEN);
	error -= __copy_to_user(&name->version, &utsname()->version,
				__OLD_UTS_LEN);
	error -= __put_user(0, name->version + __OLD_UTS_LEN);
	error -= __copy_to_user(&name->machine, &utsname()->machine,
				__OLD_UTS_LEN);
	error = __put_user(0, name->machine + __OLD_UTS_LEN);
	error = error ? -EFAULT : 0;

	return error;
}

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

	ti->tp_value = addr;
	if (cpu_has_userlocal)
		write_c0_userlocal(addr);

	return 0;
}

asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
{
	switch (cmd) {
	case MIPS_ATOMIC_SET:
		printk(KERN_CRIT "How did I get here?\n");
		return -EINVAL;

	case MIPS_FIXADE:
		if (arg1 & ~3)
			return -EINVAL;

		if (arg1 & 1)
			set_thread_flag(TIF_FIXADE);
		else
			clear_thread_flag(TIF_FIXADE);
		if (arg1 & 2)
			set_thread_flag(TIF_LOGADE);
		else
			clear_thread_flag(TIF_FIXADE);

		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 (unsigned int 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: {
			unsigned long raddr;
			ret = do_shmat (first, (char __user *) ptr, second,
					&raddr);
			if (ret)
				return ret;
			return put_user (raddr, (unsigned long __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,
					 (unsigned long *) 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);
}

/*
 * Do a system call from kernel instead of calling sys_execve so we
 * end up with proper pt_regs.
 */
int kernel_execve(const char *filename, char *const argv[], char *const envp[])
{
	register unsigned long __a0 asm("$4") = (unsigned long) filename;
	register unsigned long __a1 asm("$5") = (unsigned long) argv;
	register unsigned long __a2 asm("$6") = (unsigned long) envp;
	register unsigned long __a3 asm("$7");
	unsigned long __v0;

	__asm__ volatile ("					\n"
	"	.set	noreorder				\n"
	"	li	$2, %5		# __NR_execve		\n"
	"	syscall						\n"
	"	move	%0, $2					\n"
	"	.set	reorder					\n"
	: "=&r" (__v0), "=r" (__a3)
	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
	: "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
	  "memory");

	if (__a3 == 0)
		return __v0;

	return -__v0;
}
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	*/
	10	#include <linux/a.out.h>
a9415644	11	#include <linux/capability.h>
1da177e4 LT	12	#include <linux/errno.h>
	13	#include <linux/linkage.h>
	14	#include <linux/mm.h>
4e950f6f	15	#include <linux/fs.h>
1da177e4	16	#include <linux/smp.h>
1da177e4 LT	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	{
947df17c PA	164	if (pgoff & (~PAGE_MASK >> 12))
	165	return -EINVAL;
	166
	167	return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
1da177e4 LT	168	}
	169
	170	save_static_function(sys_fork);
f5dbeaf5	171	static int __used noinline
1da177e4 LT	172	_sys_fork(nabi_no_regargs struct pt_regs regs)
	173	{
	174	return do_fork(SIGCHLD, regs.regs[29], &regs, 0, NULL, NULL);
	175	}
	176
	177	save_static_function(sys_clone);
f5dbeaf5	178	static int __used noinline
1da177e4 LT	179	_sys_clone(nabi_no_regargs struct pt_regs regs)
	180	{
	181	unsigned long clone_flags;
	182	unsigned long newsp;
3c37026d	183	int __user parent_tidptr, child_tidptr;
1da177e4 LT	184
	185	clone_flags = regs.regs[4];
	186	newsp = regs.regs[5];
	187	if (!newsp)
	188	newsp = regs.regs[29];
3c37026d RB	189	parent_tidptr = (int __user *) regs.regs[6];
	190	#ifdef CONFIG_32BIT
	191	/* We need to fetch the fifth argument off the stack. */
	192	child_tidptr = NULL;
	193	if (clone_flags & (CLONE_CHILD_SETTID \| CLONE_CHILD_CLEARTID)) {
	194	int __user __user usp = (int __user __user ) regs.regs[29];
	195	if (regs.regs[2] == __NR_syscall) {
	196	if (get_user (child_tidptr, &usp[5]))
	197	return -EFAULT;
	198	}
	199	else if (get_user (child_tidptr, &usp[4]))
	200	return -EFAULT;
	201	}
	202	#else
	203	child_tidptr = (int __user *) regs.regs[8];
	204	#endif
1da177e4 LT	205	return do_fork(clone_flags, newsp, &regs, 0,
	206	parent_tidptr, child_tidptr);
	207	}
	208
	209	/*
	210	* sys_execve() executes a new program.
	211	*/
	212	asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
	213	{
	214	int error;
	215	char * filename;
	216
be6e518b	217	filename = getname((char __user *) (long)regs.regs[4]);
1da177e4 LT	218	error = PTR_ERR(filename);
	219	if (IS_ERR(filename))
	220	goto out;
be6e518b AN	221	error = do_execve(filename, (char __user __user ) (long)regs.regs[5],
be6e518b AN	222	(char __user __user ) (long)regs.regs[6], &regs);
1da177e4 LT	223	putname(filename);
	224
	225	out:
	226	return error;
	227	}
	228
	229	/*
	230	* Compacrapability ...
	231	*/
be6e518b	232	asmlinkage int sys_uname(struct old_utsname __user * name)
1da177e4	233	{
e9ff3990	234	if (name && !copy_to_user(name, utsname(), sizeof (*name)))
1da177e4 LT	235	return 0;
	236	return -EFAULT;
	237	}
	238
	239	/*
	240	* Compacrapability ...
	241	*/
be6e518b	242	asmlinkage int sys_olduname(struct oldold_utsname __user * name)
1da177e4 LT	243	{
	244	int error;
	245
	246	if (!name)
	247	return -EFAULT;
	248	if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname)))
	249	return -EFAULT;
	250
e9ff3990 SH	251	error = __copy_to_user(&name->sysname, &utsname()->sysname,
	252	__OLD_UTS_LEN);
	253	error -= __put_user(0, name->sysname + __OLD_UTS_LEN);
	254	error -= __copy_to_user(&name->nodename, &utsname()->nodename,
	255	__OLD_UTS_LEN);
	256	error -= __put_user(0, name->nodename + __OLD_UTS_LEN);
	257	error -= __copy_to_user(&name->release, &utsname()->release,
	258	__OLD_UTS_LEN);
	259	error -= __put_user(0, name->release + __OLD_UTS_LEN);
	260	error -= __copy_to_user(&name->version, &utsname()->version,
	261	__OLD_UTS_LEN);
	262	error -= __put_user(0, name->version + __OLD_UTS_LEN);
	263	error -= __copy_to_user(&name->machine, &utsname()->machine,
	264	__OLD_UTS_LEN);
	265	error = __put_user(0, name->machine + __OLD_UTS_LEN);
1da177e4 LT	266	error = error ? -EFAULT : 0;
	267
	268	return error;
	269	}
	270
06be375b	271	asmlinkage int sys_set_thread_area(unsigned long addr)
3c37026d	272	{
dc8f6029	273	struct thread_info *ti = task_thread_info(current);
3c37026d RB	274
3c37026d RB	275	ti->tp_value = addr;
a3692020 RB	276	if (cpu_has_userlocal)
a3692020 RB	277	write_c0_userlocal(addr);
06be375b RB	278
06be375b RB	279	return 0;
3c37026d RB	280	}
3c37026d RB	281
1da177e4 LT	282	asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
1da177e4 LT	283	{
293c5bd1	284	switch (cmd) {
1da177e4 LT	285	case MIPS_ATOMIC_SET:
	286	printk(KERN_CRIT "How did I get here?\n");
	287	return -EINVAL;
	288
	289	case MIPS_FIXADE:
293c5bd1 RB	290	if (arg1 & ~3)
	291	return -EINVAL;
	292
	293	if (arg1 & 1)
	294	set_thread_flag(TIF_FIXADE);
	295	else
	296	clear_thread_flag(TIF_FIXADE);
	297	if (arg1 & 2)
	298	set_thread_flag(TIF_LOGADE);
	299	else
	300	clear_thread_flag(TIF_FIXADE);
	301
1da177e4 LT	302	return 0;
	303
	304	case FLUSH_CACHE:
	305	__flush_cache_all();
	306	return 0;
1da177e4 LT	307	}
	308
	309	return -EINVAL;
	310	}
	311
	312	/*
	313	* sys_ipc() is the de-multiplexer for the SysV IPC calls..
	314	*
	315	* This is really horribly ugly.
	316	*/
fc103349	317	asmlinkage int sys_ipc (unsigned int call, int first, int second,
be6e518b	318	unsigned long third, void __user *ptr, long fifth)
1da177e4 LT	319	{
	320	int version, ret;
	321
	322	version = call >> 16; /* hack for backward compatibility */
	323	call &= 0xffff;
	324
	325	switch (call) {
	326	case SEMOP:
be6e518b AN	327	return sys_semtimedop (first, (struct sembuf __user *)ptr,
be6e518b AN	328	second, NULL);
1da177e4	329	case SEMTIMEDOP:
be6e518b AN	330	return sys_semtimedop (first, (struct sembuf __user *)ptr,
	331	second,
	332	(const struct timespec __user *)fifth);
1da177e4 LT	333	case SEMGET:
	334	return sys_semget (first, second, third);
	335	case SEMCTL: {
	336	union semun fourth;
	337	if (!ptr)
	338	return -EINVAL;
219ac73a	339	if (get_user(fourth.__pad, (void __user __user ) ptr))
1da177e4 LT	340	return -EFAULT;
	341	return sys_semctl (first, second, third, fourth);
	342	}
	343
	344	case MSGSND:
be6e518b	345	return sys_msgsnd (first, (struct msgbuf __user *) ptr,
1da177e4 LT	346	second, third);
	347	case MSGRCV:
	348	switch (version) {
	349	case 0: {
	350	struct ipc_kludge tmp;
	351	if (!ptr)
	352	return -EINVAL;
	353
	354	if (copy_from_user(&tmp,
be6e518b	355	(struct ipc_kludge __user *) ptr,
1da177e4 LT	356	sizeof (tmp)))
	357	return -EFAULT;
	358	return sys_msgrcv (first, tmp.msgp, second,
	359	tmp.msgtyp, third);
	360	}
	361	default:
	362	return sys_msgrcv (first,
be6e518b	363	(struct msgbuf __user *) ptr,
1da177e4 LT	364	second, fifth, third);
	365	}
	366	case MSGGET:
	367	return sys_msgget ((key_t) first, second);
	368	case MSGCTL:
be6e518b AN	369	return sys_msgctl (first, second,
be6e518b AN	370	(struct msqid_ds __user *) ptr);
1da177e4 LT	371
	372	case SHMAT:
	373	switch (version) {
	374	default: {
fc103349	375	unsigned long raddr;
be6e518b AN	376	ret = do_shmat (first, (char __user *) ptr, second,
be6e518b AN	377	&raddr);
1da177e4 LT	378	if (ret)
1da177e4 LT	379	return ret;
fc103349	380	return put_user (raddr, (unsigned long __user *) third);
1da177e4 LT	381	}
	382	case 1: /* iBCS2 emulator entry point */
	383	if (!segment_eq(get_fs(), get_ds()))
	384	return -EINVAL;
be6e518b	385	return do_shmat (first, (char __user *) ptr, second,
fc103349	386	(unsigned long *) third);
1da177e4 LT	387	}
1da177e4 LT	388	case SHMDT:
be6e518b	389	return sys_shmdt ((char __user *)ptr);
1da177e4 LT	390	case SHMGET:
	391	return sys_shmget (first, second, third);
	392	case SHMCTL:
	393	return sys_shmctl (first, second,
be6e518b	394	(struct shmid_ds __user *) ptr);
1da177e4 LT	395	default:
	396	return -ENOSYS;
	397	}
	398	}
	399
1da177e4 LT	400	/*
	401	* No implemented yet ...
	402	*/
	403	asmlinkage int sys_cachectl(char *addr, int nbytes, int op)
	404	{
	405	return -ENOSYS;
	406	}
	407
	408	/*
	409	* If we ever come here the user sp is bad. Zap the process right away.
	410	* Due to the bad stack signaling wouldn't work.
	411	*/
	412	asmlinkage void bad_stack(void)
	413	{
	414	do_exit(SIGSEGV);
	415	}
fe74290d AB	416
	417	/*
	418	* Do a system call from kernel instead of calling sys_execve so we
	419	* end up with proper pt_regs.
	420	*/
	421	int kernel_execve(const char filename, char const argv[], char *const envp[])
	422	{
	423	register unsigned long __a0 asm("$4") = (unsigned long) filename;
	424	register unsigned long __a1 asm("$5") = (unsigned long) argv;
	425	register unsigned long __a2 asm("$6") = (unsigned long) envp;
	426	register unsigned long __a3 asm("$7");
	427	unsigned long __v0;
	428
	429	__asm__ volatile (" \n"
	430	" .set noreorder \n"
	431	" li $2, %5 # __NR_execve \n"
	432	" syscall \n"
	433	" move %0, $2 \n"
	434	" .set reorder \n"
	435	: "=&r" (__v0), "=r" (__a3)
	436	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
	437	: "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
	438	"memory");
	439
	440	if (__a3 == 0)
	441	return __v0;
	442
	443	return -__v0;
	444	}