/*
 * Conversion between 32-bit and 64-bit native system calls.
 *
 * Copyright (C) 2000 Silicon Graphics, Inc.
 * Written by Ulf Carlsson (ulfc@engr.sgi.com)
 * sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com)
 */
#include <linux/config.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/file.h>
#include <linux/smp_lock.h>
#include <linux/highuid.h>
#include <linux/dirent.h>
#include <linux/resource.h>
#include <linux/highmem.h>
#include <linux/time.h>
#include <linux/times.h>
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/filter.h>
#include <linux/shm.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/icmpv6.h>
#include <linux/sysctl.h>
#include <linux/utime.h>
#include <linux/utsname.h>
#include <linux/personality.h>
#include <linux/timex.h>
#include <linux/dnotify.h>
#include <linux/module.h>
#include <linux/binfmts.h>
#include <linux/security.h>
#include <linux/compat.h>
#include <linux/vfs.h>

#include <net/sock.h>
#include <net/scm.h>

#include <asm/ipc.h>
#include <asm/sim.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/mman.h>

/* Use this to get at 32-bit user passed pointers. */
/* A() macro should be used for places where you e.g.
   have some internal variable u32 and just want to get
   rid of a compiler warning. AA() has to be used in
   places where you want to convert a function argument
   to 32bit pointer or when you e.g. access pt_regs
   structure and want to consider 32bit registers only.
 */
#define A(__x) ((unsigned long)(__x))
#define AA(__x) ((unsigned long)((int)__x))

#ifdef __MIPSEB__
#define merge_64(r1,r2)	((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
#endif
#ifdef __MIPSEL__
#define merge_64(r1,r2)	((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
#endif

/*
 * Revalidate the inode. This is required for proper NFS attribute caching.
 */

int cp_compat_stat(struct kstat *stat, struct compat_stat *statbuf)
{
	struct compat_stat tmp;

	memset(&tmp, 0, sizeof(tmp));
	tmp.st_dev = stat->dev;
	tmp.st_ino = stat->ino;
	tmp.st_mode = stat->mode;
	tmp.st_nlink = stat->nlink;
	SET_STAT_UID(tmp, stat->uid);
	SET_STAT_GID(tmp, stat->gid);
	tmp.st_rdev = stat->rdev;
	tmp.st_size = stat->size;
	tmp.st_atime = stat->atime.tv_sec;
	tmp.st_mtime = stat->mtime.tv_sec;
	tmp.st_ctime = stat->ctime.tv_sec;
#ifdef STAT_HAVE_NSEC
	tmp.st_atime_nsec = stat->atime.tv_nsec;
	tmp.st_mtime_nsec = stat->mtime.tv_nsec;
	tmp.st_ctime_nsec = stat->ctime.tv_nsec;
#endif
	tmp.st_blocks = stat->blocks;
	tmp.st_blksize = stat->blksize;
	return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
}

asmlinkage unsigned long
sys32_mmap2(unsigned long addr, size_t len, unsigned long prot,
         unsigned long flags, unsigned long fd, unsigned long pgoff)
{
	struct file * file = NULL;
	unsigned long error;

	error = -EINVAL;
	if (!(flags & MAP_ANONYMOUS)) {
		error = -EBADF;
		file = fget(fd);
		if (!file)
			goto out;
	}
	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);

	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 sys_truncate(const char * path, unsigned long length);

asmlinkage int sys_truncate64(const char *path, unsigned int high,
			      unsigned int low)
{
	if ((int)high < 0)
		return -EINVAL;
	return sys_truncate(path, ((long) high << 32) | low);
}

asmlinkage long sys_ftruncate(unsigned int fd, unsigned long length);

asmlinkage int sys_ftruncate64(unsigned int fd, unsigned int high,
			       unsigned int low)
{
	if ((int)high < 0)
		return -EINVAL;
	return sys_ftruncate(fd, ((long) high << 32) | low);
}

/*
 * count32() counts the number of arguments/envelopes
 */
static int count32(u32 * argv, int max)
{
	int i = 0;

	if (argv != NULL) {
		for (;;) {
			u32 p; int error;

			error = get_user(p,argv);
			if (error)
				return error;
			if (!p)
				break;
			argv++;
			if (++i > max)
				return -E2BIG;
		}
	}
	return i;
}


/*
 * 'copy_strings32()' copies argument/envelope strings from user
 * memory to free pages in kernel mem. These are in a format ready
 * to be put directly into the top of new user memory.
 */
int copy_strings32(int argc, u32 * argv, struct linux_binprm *bprm)
{
	while (argc-- > 0) {
		u32 str;
		int len;
		unsigned long pos;

		if (get_user(str, argv+argc) || !str ||
		     !(len = strnlen_user((char *)A(str), bprm->p)))
			return -EFAULT;
		if (bprm->p < len)
			return -E2BIG;

		bprm->p -= len;
		/* XXX: add architecture specific overflow check here. */

		pos = bprm->p;
		while (len > 0) {
			char *kaddr;
			int i, new, err;
			struct page *page;
			int offset, bytes_to_copy;

			offset = pos % PAGE_SIZE;
			i = pos/PAGE_SIZE;
			page = bprm->page[i];
			new = 0;
			if (!page) {
				page = alloc_page(GFP_HIGHUSER);
				bprm->page[i] = page;
				if (!page)
					return -ENOMEM;
				new = 1;
			}
			kaddr = kmap(page);

			if (new && offset)
				memset(kaddr, 0, offset);
			bytes_to_copy = PAGE_SIZE - offset;
			if (bytes_to_copy > len) {
				bytes_to_copy = len;
				if (new)
					memset(kaddr+offset+len, 0,
					       PAGE_SIZE-offset-len);
			}
			err = copy_from_user(kaddr + offset, (char *)A(str),
			                     bytes_to_copy);
			flush_dcache_page(page);
			kunmap(page);

			if (err)
				return -EFAULT;

			pos += bytes_to_copy;
			str += bytes_to_copy;
			len -= bytes_to_copy;
		}
	}
	return 0;
}

/*
 * sys32_execve() executes a new program.
 */
static inline int 
do_execve32(char * filename, u32 * argv, u32 * envp, struct pt_regs * regs)
{
	struct linux_binprm bprm;
	struct file * file;
	int retval;
	int i;

	file = open_exec(filename);

	retval = PTR_ERR(file);
	if (IS_ERR(file))
		return retval;

	bprm.p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
	memset(bprm.page, 0, MAX_ARG_PAGES * sizeof(bprm.page[0]));

	bprm.file = file;
	bprm.filename = filename;
	bprm.sh_bang = 0;
	bprm.loader = 0;
	bprm.exec = 0;
	bprm.security = NULL;
	bprm.mm = mm_alloc();
	retval = -ENOMEM;
	if (!bprm.mm) 
		goto out_file;

	retval = init_new_context(current, bprm.mm);
	if (retval < 0)
		goto out_mm;

	bprm.argc = count32(argv, bprm.p / sizeof(u32));
	if ((retval = bprm.argc) < 0)
		goto out_mm;

	bprm.envc = count32(envp, bprm.p / sizeof(u32));
	if ((retval = bprm.envc) < 0)
		goto out_mm;

	if ((retval = security_bprm_alloc(&bprm)))
		goto out;

	retval = prepare_binprm(&bprm);
	if (retval < 0)
		goto out;
	
	retval = copy_strings_kernel(1, &bprm.filename, &bprm);
	if (retval < 0)
		goto out;

	bprm.exec = bprm.p;
	retval = copy_strings32(bprm.envc, envp, &bprm);
	if (retval < 0)
		goto out;

	retval = copy_strings32(bprm.argc, argv, &bprm);
	if (retval < 0)
		goto out;

	retval = search_binary_handler(&bprm, regs);
	if (retval >= 0) {
		/* execve success */
		security_bprm_free(&bprm);
		return retval;
	}

out:
	/* Something went wrong, return the inode and free the argument pages*/
	for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
		struct page * page = bprm.page[i];
		if (page)
			__free_page(page);
	}

	if (bprm.security)
		security_bprm_free(&bprm);

out_mm:
	mmdrop(bprm.mm);

out_file:
	if (bprm.file) {
		allow_write_access(bprm.file);
		fput(bprm.file);
	}
	return retval;
}

/*
 * sys_execve() executes a new program.
 */
asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
{
	int error;
	char * filename;

	filename = getname((char *) (long)regs.regs[4]);
	printk("Executing: %s\n", filename);
	error = PTR_ERR(filename);
	if (IS_ERR(filename))
		goto out;
	error = do_execve32(filename, (u32 *) (long)regs.regs[5],
	                  (u32 *) (long)regs.regs[6], &regs);
	putname(filename);

out:
	return error;
}

struct dirent32 {
	unsigned int	d_ino;
	unsigned int	d_off;
	unsigned short	d_reclen;
	char		d_name[NAME_MAX + 1];
};

static void
xlate_dirent(void *dirent64, void *dirent32, long n)
{
	long off;
	struct dirent *dirp;
	struct dirent32 *dirp32;

	off = 0;
	while (off < n) {
		dirp = (struct dirent *)(dirent64 + off);
		dirp32 = (struct dirent32 *)(dirent32 + off);
		off += dirp->d_reclen;
		dirp32->d_ino = dirp->d_ino;
		dirp32->d_off = (unsigned int)dirp->d_off;
		dirp32->d_reclen = dirp->d_reclen;
		strncpy(dirp32->d_name, dirp->d_name, dirp->d_reclen - ((3 * 4) + 2));
	}
	return;
}

asmlinkage long sys_getdents(unsigned int fd, void * dirent, unsigned int count);

asmlinkage long
sys32_getdents(unsigned int fd, void * dirent32, unsigned int count)
{
	long n;
	void *dirent64;

	dirent64 = (void *)((unsigned long)(dirent32 + (sizeof(long) - 1)) & ~(sizeof(long) - 1));
	if ((n = sys_getdents(fd, dirent64, count - (dirent64 - dirent32))) < 0)
		return(n);
	xlate_dirent(dirent64, dirent32, n);
	return(n);
}

asmlinkage int old_readdir(unsigned int fd, void * dirent, unsigned int count);

asmlinkage int
sys32_readdir(unsigned int fd, void * dirent32, unsigned int count)
{
	int n;
	struct dirent dirent64;

	if ((n = old_readdir(fd, &dirent64, count)) < 0)
		return(n);
	xlate_dirent(&dirent64, dirent32, dirent64.d_reclen);
	return(n);
}

struct rusage32 {
        struct compat_timeval ru_utime;
        struct compat_timeval ru_stime;
        int    ru_maxrss;
        int    ru_ixrss;
        int    ru_idrss;
        int    ru_isrss;
        int    ru_minflt;
        int    ru_majflt;
        int    ru_nswap;
        int    ru_inblock;
        int    ru_oublock;
        int    ru_msgsnd;
        int    ru_msgrcv;
        int    ru_nsignals;
        int    ru_nvcsw;
        int    ru_nivcsw;
};

static int
put_rusage (struct rusage32 *ru, struct rusage *r)
{
	int err;

	if (verify_area(VERIFY_WRITE, ru, sizeof *ru))
		return -EFAULT;

	err = __put_user (r->ru_utime.tv_sec, &ru->ru_utime.tv_sec);
	err |= __put_user (r->ru_utime.tv_usec, &ru->ru_utime.tv_usec);
	err |= __put_user (r->ru_stime.tv_sec, &ru->ru_stime.tv_sec);
	err |= __put_user (r->ru_stime.tv_usec, &ru->ru_stime.tv_usec);
	err |= __put_user (r->ru_maxrss, &ru->ru_maxrss);
	err |= __put_user (r->ru_ixrss, &ru->ru_ixrss);
	err |= __put_user (r->ru_idrss, &ru->ru_idrss);
	err |= __put_user (r->ru_isrss, &ru->ru_isrss);
	err |= __put_user (r->ru_minflt, &ru->ru_minflt);
	err |= __put_user (r->ru_majflt, &ru->ru_majflt);
	err |= __put_user (r->ru_nswap, &ru->ru_nswap);
	err |= __put_user (r->ru_inblock, &ru->ru_inblock);
	err |= __put_user (r->ru_oublock, &ru->ru_oublock);
	err |= __put_user (r->ru_msgsnd, &ru->ru_msgsnd);
	err |= __put_user (r->ru_msgrcv, &ru->ru_msgrcv);
	err |= __put_user (r->ru_nsignals, &ru->ru_nsignals);
	err |= __put_user (r->ru_nvcsw, &ru->ru_nvcsw);
	err |= __put_user (r->ru_nivcsw, &ru->ru_nivcsw);

	return err;
}

asmlinkage int
sys32_wait4(compat_pid_t pid, unsigned int * stat_addr, int options,
	    struct rusage32 * ru)
{
	if (!ru)
		return sys_wait4(pid, stat_addr, options, NULL);
	else {
		struct rusage r;
		int ret;
		unsigned int status;
		mm_segment_t old_fs = get_fs();

		set_fs(KERNEL_DS);
		ret = sys_wait4(pid, stat_addr ? &status : NULL, options, &r);
		set_fs(old_fs);
		if (put_rusage (ru, &r)) return -EFAULT;
		if (stat_addr && put_user (status, stat_addr))
			return -EFAULT;
		return ret;
	}
}

asmlinkage int
sys32_waitpid(compat_pid_t pid, unsigned int *stat_addr, int options)
{
	return sys32_wait4(pid, stat_addr, options, NULL);
}

struct sysinfo32 {
        s32 uptime;
        u32 loads[3];
        u32 totalram;
        u32 freeram;
        u32 sharedram;
        u32 bufferram;
        u32 totalswap;
        u32 freeswap;
        u16 procs;
	u32 totalhigh;
	u32 freehigh;
	u32 mem_unit;
	char _f[8];
};

extern asmlinkage int sys_sysinfo(struct sysinfo *info);

asmlinkage int sys32_sysinfo(struct sysinfo32 *info)
{
	struct sysinfo s;
	int ret, err;
	mm_segment_t old_fs = get_fs ();
	
	set_fs (KERNEL_DS);
	ret = sys_sysinfo(&s);
	set_fs (old_fs);
	err = put_user (s.uptime, &info->uptime);
	err |= __put_user (s.loads[0], &info->loads[0]);
	err |= __put_user (s.loads[1], &info->loads[1]);
	err |= __put_user (s.loads[2], &info->loads[2]);
	err |= __put_user (s.totalram, &info->totalram);
	err |= __put_user (s.freeram, &info->freeram);
	err |= __put_user (s.sharedram, &info->sharedram);
	err |= __put_user (s.bufferram, &info->bufferram);
	err |= __put_user (s.totalswap, &info->totalswap);
	err |= __put_user (s.freeswap, &info->freeswap);
	err |= __put_user (s.procs, &info->procs);
	err |= __put_user (s.totalhigh, &info->totalhigh);
	err |= __put_user (s.freehigh, &info->freehigh);
	err |= __put_user (s.mem_unit, &info->mem_unit);
	if (err)
		return -EFAULT;
	return ret;
}

#define RLIM_INFINITY32	0x7fffffff
#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)

struct rlimit32 {
	int	rlim_cur;
	int	rlim_max;
};

#ifdef __MIPSEB__
asmlinkage long sys32_truncate64(const char * path, unsigned long __dummy,
	int length_hi, int length_lo)
#endif
#ifdef __MIPSEL__
asmlinkage long sys32_truncate64(const char * path, unsigned long __dummy,
	int length_lo, int length_hi)
#endif
{
	loff_t length;

	length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;

	return sys_truncate(path, length);
}

#ifdef __MIPSEB__
asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
	int length_hi, int length_lo)
#endif
#ifdef __MIPSEL__
asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
	int length_lo, int length_hi)
#endif
{
	loff_t length;

	length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;

	return sys_ftruncate(fd, length);
}

static inline long
get_tv32(struct timeval *o, struct compat_timeval *i)
{
	return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
		(__get_user(o->tv_sec, &i->tv_sec) |
		 __get_user(o->tv_usec, &i->tv_usec)));
}

static inline long
put_tv32(struct compat_timeval *o, struct timeval *i)
{
	return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
		(__put_user(i->tv_sec, &o->tv_sec) |
		 __put_user(i->tv_usec, &o->tv_usec)));
}

extern struct timezone sys_tz;

asmlinkage int
sys32_gettimeofday(struct compat_timeval *tv, struct timezone *tz)
{
	if (tv) {
		struct timeval ktv;
		do_gettimeofday(&ktv);
		if (put_tv32(tv, &ktv))
			return -EFAULT;
	}
	if (tz) {
		if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
			return -EFAULT;
	}
	return 0;
}

static inline long get_ts32(struct timespec *o, struct compat_timeval *i)
{
	long usec;

	if (!access_ok(VERIFY_READ, i, sizeof(*i)))
		return -EFAULT;
	if (__get_user(o->tv_sec, &i->tv_sec))
		return -EFAULT;
	if (__get_user(usec, &i->tv_usec))
		return -EFAULT;
	o->tv_nsec = usec * 1000;
		return 0;
}

asmlinkage int
sys32_settimeofday(struct compat_timeval *tv, struct timezone *tz)
{
	struct timespec kts;
	struct timezone ktz;

 	if (tv) {
		if (get_ts32(&kts, tv))
			return -EFAULT;
	}
	if (tz) {
		if (copy_from_user(&ktz, tz, sizeof(ktz)))
			return -EFAULT;
	}

	return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
}

extern asmlinkage long sys_llseek(unsigned int fd, unsigned long offset_high,
			          unsigned long offset_low, loff_t * result,
			          unsigned int origin);

asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
			    unsigned int offset_low, loff_t * result,
			    unsigned int origin)
{
	return sys_llseek(fd, offset_high, offset_low, result, origin);
}

typedef ssize_t (*IO_fn_t)(struct file *, char *, size_t, loff_t *);

static long
do_readv_writev32(int type, struct file *file, const struct compat_iovec *vector,
		  u32 count)
{
	unsigned long tot_len;
	struct iovec iovstack[UIO_FASTIOV];
	struct iovec *iov=iovstack, *ivp;
	struct inode *inode;
	long retval, i;
	IO_fn_t fn;

	/* First get the "struct iovec" from user memory and
	 * verify all the pointers
	 */
	if (!count)
		return 0;
	if(verify_area(VERIFY_READ, vector, sizeof(struct compat_iovec)*count))
		return -EFAULT;
	if (count > UIO_MAXIOV)
		return -EINVAL;
	if (count > UIO_FASTIOV) {
		iov = kmalloc(count*sizeof(struct iovec), GFP_KERNEL);
		if (!iov)
			return -ENOMEM;
	}

	tot_len = 0;
	i = count;
	ivp = iov;
	while (i > 0) {
		u32 len;
		u32 buf;

		__get_user(len, &vector->iov_len);
		__get_user(buf, &vector->iov_base);
		tot_len += len;
		ivp->iov_base = (void *)A(buf);
		ivp->iov_len = (__kernel_size_t) len;
		vector++;
		ivp++;
		i--;
	}

	inode = file->f_dentry->d_inode;
	/* VERIFY_WRITE actually means a read, as we write to user space */
	retval = locks_verify_area((type == VERIFY_WRITE
				    ? FLOCK_VERIFY_READ : FLOCK_VERIFY_WRITE),
				   inode, file, file->f_pos, tot_len);
	if (retval) {
		if (iov != iovstack)
			kfree(iov);
		return retval;
	}

	/* Then do the actual IO.  Note that sockets need to be handled
	 * specially as they have atomicity guarantees and can handle
	 * iovec's natively
	 */
	if (inode->i_sock) {
		int err;
		err = sock_readv_writev(type, inode, file, iov, count, tot_len);
		if (iov != iovstack)
			kfree(iov);
		return err;
	}

	if (!file->f_op) {
		if (iov != iovstack)
			kfree(iov);
		return -EINVAL;
	}
	/* VERIFY_WRITE actually means a read, as we write to user space */
	fn = file->f_op->read;
	if (type == VERIFY_READ)
		fn = (IO_fn_t) file->f_op->write;
	ivp = iov;
	while (count > 0) {
		void * base;
		int len, nr;

		base = ivp->iov_base;
		len = ivp->iov_len;
		ivp++;
		count--;
		nr = fn(file, base, len, &file->f_pos);
		if (nr < 0) {
			if (retval)
				break;
			retval = nr;
			break;
		}
		retval += nr;
		if (nr != len)
			break;
	}
	if (iov != iovstack)
		kfree(iov);

	return retval;
}

asmlinkage long
sys32_readv(int fd, struct compat_iovec *vector, u32 count)
{
	struct file *file;
	ssize_t ret;

	ret = -EBADF;
	file = fget(fd);
	if (!file)
		goto bad_file;
	if (file->f_op && (file->f_mode & FMODE_READ) &&
	    (file->f_op->readv || file->f_op->read))
		ret = do_readv_writev32(VERIFY_WRITE, file, vector, count);

	fput(file);

bad_file:
	return ret;
}

asmlinkage long
sys32_writev(int fd, struct compat_iovec *vector, u32 count)
{
	struct file *file;
	ssize_t ret;

	ret = -EBADF;
	file = fget(fd);
	if(!file)
		goto bad_file;
	if (file->f_op && (file->f_mode & FMODE_WRITE) &&
	    (file->f_op->writev || file->f_op->write))
	        ret = do_readv_writev32(VERIFY_READ, file, vector, count);
	fput(file);

bad_file:
	return ret;
}

/* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
   lseek back to original location.  They fail just like lseek does on
   non-seekable files.  */

asmlinkage ssize_t sys32_pread(unsigned int fd, char * buf,
			       size_t count, u32 unused, u64 a4, u64 a5)
{
	ssize_t ret;
	struct file * file;
	ssize_t (*read)(struct file *, char *, size_t, loff_t *);
	loff_t pos;

	ret = -EBADF;
	file = fget(fd);
	if (!file)
		goto bad_file;
	if (!(file->f_mode & FMODE_READ))
		goto out;
	pos = merge_64(a4, a5);
	ret = locks_verify_area(FLOCK_VERIFY_READ, file->f_dentry->d_inode,
				file, pos, count);
	if (ret)
		goto out;
	ret = -EINVAL;
	if (!file->f_op || !(read = file->f_op->read))
		goto out;
	if (pos < 0)
		goto out;
	ret = read(file, buf, count, &pos);
	if (ret > 0)
		dnotify_parent(file->f_dentry, DN_ACCESS);
out:
	fput(file);
bad_file:
	return ret;
}

asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char * buf,
			        size_t count, u32 unused, u64 a4, u64 a5)
{
	ssize_t ret;
	struct file * file;
	ssize_t (*write)(struct file *, const char *, size_t, loff_t *);
	loff_t pos;

	ret = -EBADF;
	file = fget(fd);
	if (!file)
		goto bad_file;
	if (!(file->f_mode & FMODE_WRITE))
		goto out;
	pos = merge_64(a4, a5);
	ret = locks_verify_area(FLOCK_VERIFY_WRITE, file->f_dentry->d_inode,
				file, pos, count);
	if (ret)
		goto out;
	ret = -EINVAL;
	if (!file->f_op || !(write = file->f_op->write))
		goto out;
	if (pos < 0)
		goto out;

	ret = write(file, buf, count, &pos);
	if (ret > 0)
		dnotify_parent(file->f_dentry, DN_MODIFY);
out:
	fput(file);
bad_file:
	return ret;
}
/*
 * Ooo, nasty.  We need here to frob 32-bit unsigned longs to
 * 64-bit unsigned longs.
 */

static inline int
get_fd_set32(unsigned long n, unsigned long *fdset, u32 *ufdset)
{
	if (ufdset) {
		unsigned long odd;

		if (verify_area(VERIFY_WRITE, ufdset, n*sizeof(u32)))
			return -EFAULT;

		odd = n & 1UL;
		n &= ~1UL;
		while (n) {
			unsigned long h, l;
			__get_user(l, ufdset);
			__get_user(h, ufdset+1);
			ufdset += 2;
			*fdset++ = h << 32 | l;
			n -= 2;
		}
		if (odd)
			__get_user(*fdset, ufdset);
	} else {
		/* Tricky, must clear full unsigned long in the
		 * kernel fdset at the end, this makes sure that
		 * actually happens.
		 */
		memset(fdset, 0, ((n + 1) & ~1)*sizeof(u32));
	}
	return 0;
}

static inline void
set_fd_set32(unsigned long n, u32 *ufdset, unsigned long *fdset)
{
	unsigned long odd;

	if (!ufdset)
		return;

	odd = n & 1UL;
	n &= ~1UL;
	while (n) {
		unsigned long h, l;
		l = *fdset++;
		h = l >> 32;
		__put_user(l, ufdset);
		__put_user(h, ufdset+1);
		ufdset += 2;
		n -= 2;
	}
	if (odd)
		__put_user(*fdset, ufdset);
}

/*
 * We can actually return ERESTARTSYS instead of EINTR, but I'd
 * like to be certain this leads to no problems. So I return
 * EINTR just for safety.
 *
 * Update: ERESTARTSYS breaks at least the xview clock binary, so
 * I'm trying ERESTARTNOHAND which restart only when you want to.
 */
#define MAX_SELECT_SECONDS \
	((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)

asmlinkage int sys32_select(int n, u32 *inp, u32 *outp, u32 *exp, struct compat_timeval *tvp)
{
	fd_set_bits fds;
	char *bits;
	unsigned long nn;
	long timeout;
	int ret, size;

	timeout = MAX_SCHEDULE_TIMEOUT;
	if (tvp) {
		time_t sec, usec;

		if ((ret = verify_area(VERIFY_READ, tvp, sizeof(*tvp)))
		    || (ret = __get_user(sec, &tvp->tv_sec))
		    || (ret = __get_user(usec, &tvp->tv_usec)))
			goto out_nofds;

		ret = -EINVAL;
		if(sec < 0 || usec < 0)
			goto out_nofds;

		if ((unsigned long) sec < MAX_SELECT_SECONDS) {
			timeout = (usec + 1000000/HZ - 1) / (1000000/HZ);
			timeout += sec * (unsigned long) HZ;
		}
	}

	ret = -EINVAL;
	if (n < 0)
		goto out_nofds;
	if (n > current->files->max_fdset)
		n = current->files->max_fdset;

	/*
	 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
	 * since we used fdset we need to allocate memory in units of
	 * long-words.
	 */
	ret = -ENOMEM;
	size = FDS_BYTES(n);
	bits = kmalloc(6 * size, GFP_KERNEL);
	if (!bits)
		goto out_nofds;
	fds.in      = (unsigned long *)  bits;
	fds.out     = (unsigned long *) (bits +   size);
	fds.ex      = (unsigned long *) (bits + 2*size);
	fds.res_in  = (unsigned long *) (bits + 3*size);
	fds.res_out = (unsigned long *) (bits + 4*size);
	fds.res_ex  = (unsigned long *) (bits + 5*size);

	nn = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
	if ((ret = get_fd_set32(nn, fds.in, inp)) ||
	    (ret = get_fd_set32(nn, fds.out, outp)) ||
	    (ret = get_fd_set32(nn, fds.ex, exp)))
		goto out;
	zero_fd_set(n, fds.res_in);
	zero_fd_set(n, fds.res_out);
	zero_fd_set(n, fds.res_ex);

	ret = do_select(n, &fds, &timeout);

	if (tvp && !(current->personality & STICKY_TIMEOUTS)) {
		time_t sec = 0, usec = 0;
		if (timeout) {
			sec = timeout / HZ;
			usec = timeout % HZ;
			usec *= (1000000/HZ);
		}
		put_user(sec, &tvp->tv_sec);
		put_user(usec, &tvp->tv_usec);
	}

	if (ret < 0)
		goto out;
	if (!ret) {
		ret = -ERESTARTNOHAND;
		if (signal_pending(current))
			goto out;
		ret = 0;
	}

	set_fd_set32(nn, inp, fds.res_in);
	set_fd_set32(nn, outp, fds.res_out);
	set_fd_set32(nn, exp, fds.res_ex);

out:
	kfree(bits);
out_nofds:
	return ret;
}



extern asmlinkage int sys_sched_rr_get_interval(pid_t pid,
	struct timespec *interval);

asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
	struct compat_timespec *interval)
{
	struct timespec t;
	int ret;
	mm_segment_t old_fs = get_fs ();

	set_fs (KERNEL_DS);
	ret = sys_sched_rr_get_interval(pid, &t);
	set_fs (old_fs);
	if (put_user (t.tv_sec, &interval->tv_sec) ||
	    __put_user (t.tv_nsec, &interval->tv_nsec))
		return -EFAULT;
	return ret;
}

struct msgbuf32 { s32 mtype; char mtext[1]; };

struct ipc_perm32
{
	key_t    	  key;
        compat_uid_t  uid;
        compat_gid_t  gid;
        compat_uid_t  cuid;
        compat_gid_t  cgid;
        compat_mode_t	mode;
        unsigned short  seq;
};

struct ipc64_perm32 {
	key_t key;
	compat_uid_t uid;
	compat_gid_t gid;
	compat_uid_t cuid;
	compat_gid_t cgid;
	compat_mode_t	mode; 
	unsigned short	seq;
	unsigned short __pad1;
	unsigned int __unused1;
	unsigned int __unused2;
};

struct semid_ds32 {
        struct ipc_perm32 sem_perm;               /* permissions .. see ipc.h */
        compat_time_t   sem_otime;              /* last semop time */
        compat_time_t   sem_ctime;              /* last change time */
        u32 sem_base;              /* ptr to first semaphore in array */
        u32 sem_pending;          /* pending operations to be processed */
        u32 sem_pending_last;    /* last pending operation */
        u32 undo;                  /* undo requests on this array */
        unsigned short  sem_nsems;              /* no. of semaphores in array */
};

struct semid64_ds32 {
	struct ipc64_perm32	sem_perm;
	compat_time_t	sem_otime;
	compat_time_t	sem_ctime;
	unsigned int		sem_nsems;
	unsigned int		__unused1;
	unsigned int		__unused2;
};

struct msqid_ds32
{
        struct ipc_perm32 msg_perm;
        u32 msg_first;
        u32 msg_last;
        compat_time_t   msg_stime;
        compat_time_t   msg_rtime;
        compat_time_t   msg_ctime;
        u32 wwait;
        u32 rwait;
        unsigned short msg_cbytes;
        unsigned short msg_qnum;
        unsigned short msg_qbytes;
        compat_ipc_pid_t msg_lspid;
        compat_ipc_pid_t msg_lrpid;
};

struct msqid64_ds32 {
	struct ipc64_perm32 msg_perm;
	compat_time_t msg_stime;
	unsigned int __unused1;
	compat_time_t msg_rtime;
	unsigned int __unused2;
	compat_time_t msg_ctime;
	unsigned int __unused3;
	unsigned int msg_cbytes;
	unsigned int msg_qnum;
	unsigned int msg_qbytes;
	compat_pid_t msg_lspid;
	compat_pid_t msg_lrpid;
	unsigned int __unused4;
	unsigned int __unused5;
};

struct shmid_ds32 {
        struct ipc_perm32       shm_perm;
        int                     shm_segsz;
        compat_time_t		shm_atime;
        compat_time_t		shm_dtime;
        compat_time_t		shm_ctime;
        compat_ipc_pid_t    shm_cpid;
        compat_ipc_pid_t    shm_lpid;
        unsigned short          shm_nattch;
};

struct shmid64_ds32 {
	struct ipc64_perm32	shm_perm;
	compat_size_t		shm_segsz;
	compat_time_t		shm_atime;
	compat_time_t		shm_dtime;
	compat_time_t shm_ctime;
	compat_pid_t shm_cpid;
	compat_pid_t shm_lpid;
	unsigned int shm_nattch;
	unsigned int __unused1;
	unsigned int __unused2;
};

struct ipc_kludge32 {
	u32 msgp;
	s32 msgtyp;
};

static int
do_sys32_semctl(int first, int second, int third, void *uptr)
{
	union semun fourth;
	u32 pad;
	int err, err2;
	struct semid64_ds s;
	mm_segment_t old_fs;

	if (!uptr)
		return -EINVAL;
	err = -EFAULT;
	if (get_user (pad, (u32 *)uptr))
		return err;
	if ((third & ~IPC_64) == SETVAL)
		fourth.val = (int)pad;
	else
		fourth.__pad = (void *)A(pad);
	switch (third & ~IPC_64) {
	case IPC_INFO:
	case IPC_RMID:
	case IPC_SET:
	case SEM_INFO:
	case GETVAL:
	case GETPID:
	case GETNCNT:
	case GETZCNT:
	case GETALL:
	case SETVAL:
	case SETALL:
		err = sys_semctl (first, second, third, fourth);
		break;

	case IPC_STAT:
	case SEM_STAT:
		fourth.__pad = &s;
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_semctl (first, second, third, fourth);
		set_fs (old_fs);

		if (third & IPC_64) {
			struct semid64_ds32 *usp64 = (struct semid64_ds32 *) A(pad);

			if (!access_ok(VERIFY_WRITE, usp64, sizeof(*usp64))) {
				err = -EFAULT;
				break;
			}
			err2 = __put_user(s.sem_perm.key, &usp64->sem_perm.key);
			err2 |= __put_user(s.sem_perm.uid, &usp64->sem_perm.uid);
			err2 |= __put_user(s.sem_perm.gid, &usp64->sem_perm.gid);
			err2 |= __put_user(s.sem_perm.cuid, &usp64->sem_perm.cuid);
			err2 |= __put_user(s.sem_perm.cgid, &usp64->sem_perm.cgid);
			err2 |= __put_user(s.sem_perm.mode, &usp64->sem_perm.mode);
			err2 |= __put_user(s.sem_perm.seq, &usp64->sem_perm.seq);
			err2 |= __put_user(s.sem_otime, &usp64->sem_otime);
			err2 |= __put_user(s.sem_ctime, &usp64->sem_ctime);
			err2 |= __put_user(s.sem_nsems, &usp64->sem_nsems);
		} else {
			struct semid_ds32 *usp32 = (struct semid_ds32 *) A(pad);

			if (!access_ok(VERIFY_WRITE, usp32, sizeof(*usp32))) {
				err = -EFAULT;
				break;
			}
			err2 = __put_user(s.sem_perm.key, &usp32->sem_perm.key);
			err2 |= __put_user(s.sem_perm.uid, &usp32->sem_perm.uid);
			err2 |= __put_user(s.sem_perm.gid, &usp32->sem_perm.gid);
			err2 |= __put_user(s.sem_perm.cuid, &usp32->sem_perm.cuid);
			err2 |= __put_user(s.sem_perm.cgid, &usp32->sem_perm.cgid);
			err2 |= __put_user(s.sem_perm.mode, &usp32->sem_perm.mode);
			err2 |= __put_user(s.sem_perm.seq, &usp32->sem_perm.seq);
			err2 |= __put_user(s.sem_otime, &usp32->sem_otime);
			err2 |= __put_user(s.sem_ctime, &usp32->sem_ctime);
			err2 |= __put_user(s.sem_nsems, &usp32->sem_nsems);
		}
		if (err2)
			err = -EFAULT;
		break;

	default:
		err = - EINVAL;
		break;
	}

	return err;
}

static int
do_sys32_msgsnd (int first, int second, int third, void *uptr)
{
	struct msgbuf32 *up = (struct msgbuf32 *)uptr;
	struct msgbuf *p;
	mm_segment_t old_fs;
	int err;

	if (second < 0)
		return -EINVAL;
	p = kmalloc (second + sizeof (struct msgbuf)
				    + 4, GFP_USER);
	if (!p)
		return -ENOMEM;
	err = get_user (p->mtype, &up->mtype);
	if (err)
		goto out;
	err |= __copy_from_user (p->mtext, &up->mtext, second);
	if (err)
		goto out;
	old_fs = get_fs ();
	set_fs (KERNEL_DS);
	err = sys_msgsnd (first, p, second, third);
	set_fs (old_fs);
out:
	kfree (p);

	return err;
}

static int
do_sys32_msgrcv (int first, int second, int msgtyp, int third,
		 int version, void *uptr)
{
	struct msgbuf32 *up;
	struct msgbuf *p;
	mm_segment_t old_fs;
	int err;

	if (!version) {
		struct ipc_kludge32 *uipck = (struct ipc_kludge32 *)uptr;
		struct ipc_kludge32 ipck;

		err = -EINVAL;
		if (!uptr)
			goto out;
		err = -EFAULT;
		if (copy_from_user (&ipck, uipck, sizeof (struct ipc_kludge32)))
			goto out;
		uptr = (void *)AA(ipck.msgp);
		msgtyp = ipck.msgtyp;
	}

	if (second < 0)
		return -EINVAL;
	err = -ENOMEM;
	p = kmalloc (second + sizeof (struct msgbuf) + 4, GFP_USER);
	if (!p)
		goto out;
	old_fs = get_fs ();
	set_fs (KERNEL_DS);
	err = sys_msgrcv (first, p, second + 4, msgtyp, third);
	set_fs (old_fs);
	if (err < 0)
		goto free_then_out;
	up = (struct msgbuf32 *)uptr;
	if (put_user (p->mtype, &up->mtype) ||
	    __copy_to_user (&up->mtext, p->mtext, err))
		err = -EFAULT;
free_then_out:
	kfree (p);
out:
	return err;
}

static int
do_sys32_msgctl (int first, int second, void *uptr)
{
	int err = -EINVAL, err2;
	struct msqid64_ds m;
	struct msqid_ds32 *up32 = (struct msqid_ds32 *)uptr;
	struct msqid64_ds32 *up64 = (struct msqid64_ds32 *)uptr;
	mm_segment_t old_fs;

	switch (second & ~IPC_64) {
	case IPC_INFO:
	case IPC_RMID:
	case MSG_INFO:
		err = sys_msgctl (first, second, (struct msqid_ds *)uptr);
		break;

	case IPC_SET:
		if (second & IPC_64) {
			if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) {
				err = -EFAULT;
				break;
			}
			err = __get_user(m.msg_perm.uid, &up64->msg_perm.uid);
			err |= __get_user(m.msg_perm.gid, &up64->msg_perm.gid);
			err |= __get_user(m.msg_perm.mode, &up64->msg_perm.mode);
			err |= __get_user(m.msg_qbytes, &up64->msg_qbytes);
		} else {
			if (!access_ok(VERIFY_READ, up32, sizeof(*up32))) {
				err = -EFAULT;
				break;
			}
			err = __get_user(m.msg_perm.uid, &up32->msg_perm.uid);
			err |= __get_user(m.msg_perm.gid, &up32->msg_perm.gid);
			err |= __get_user(m.msg_perm.mode, &up32->msg_perm.mode);
			err |= __get_user(m.msg_qbytes, &up32->msg_qbytes);
		}
		if (err)
			break;
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_msgctl (first, second, (struct msqid_ds *)&m);
		set_fs (old_fs);
		break;

	case IPC_STAT:
	case MSG_STAT:
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_msgctl (first, second, (struct msqid_ds *)&m);
		set_fs (old_fs);
		if (second & IPC_64) {
			if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) {
				err = -EFAULT;
				break;
			}
			err2 = __put_user(m.msg_perm.key, &up64->msg_perm.key);
			err2 |= __put_user(m.msg_perm.uid, &up64->msg_perm.uid);
			err2 |= __put_user(m.msg_perm.gid, &up64->msg_perm.gid);
			err2 |= __put_user(m.msg_perm.cuid, &up64->msg_perm.cuid);
			err2 |= __put_user(m.msg_perm.cgid, &up64->msg_perm.cgid);
			err2 |= __put_user(m.msg_perm.mode, &up64->msg_perm.mode);
			err2 |= __put_user(m.msg_perm.seq, &up64->msg_perm.seq);
			err2 |= __put_user(m.msg_stime, &up64->msg_stime);
			err2 |= __put_user(m.msg_rtime, &up64->msg_rtime);
			err2 |= __put_user(m.msg_ctime, &up64->msg_ctime);
			err2 |= __put_user(m.msg_cbytes, &up64->msg_cbytes);
			err2 |= __put_user(m.msg_qnum, &up64->msg_qnum);
			err2 |= __put_user(m.msg_qbytes, &up64->msg_qbytes);
			err2 |= __put_user(m.msg_lspid, &up64->msg_lspid);
			err2 |= __put_user(m.msg_lrpid, &up64->msg_lrpid);
			if (err2)
				err = -EFAULT;
		} else {
			if (!access_ok(VERIFY_WRITE, up32, sizeof(*up32))) {
				err = -EFAULT;
				break;
			}
			err2 = __put_user(m.msg_perm.key, &up32->msg_perm.key);
			err2 |= __put_user(m.msg_perm.uid, &up32->msg_perm.uid);
			err2 |= __put_user(m.msg_perm.gid, &up32->msg_perm.gid);
			err2 |= __put_user(m.msg_perm.cuid, &up32->msg_perm.cuid);
			err2 |= __put_user(m.msg_perm.cgid, &up32->msg_perm.cgid);
			err2 |= __put_user(m.msg_perm.mode, &up32->msg_perm.mode);
			err2 |= __put_user(m.msg_perm.seq, &up32->msg_perm.seq);
			err2 |= __put_user(m.msg_stime, &up32->msg_stime);
			err2 |= __put_user(m.msg_rtime, &up32->msg_rtime);
			err2 |= __put_user(m.msg_ctime, &up32->msg_ctime);
			err2 |= __put_user(m.msg_cbytes, &up32->msg_cbytes);
			err2 |= __put_user(m.msg_qnum, &up32->msg_qnum);
			err2 |= __put_user(m.msg_qbytes, &up32->msg_qbytes);
			err2 |= __put_user(m.msg_lspid, &up32->msg_lspid);
			err2 |= __put_user(m.msg_lrpid, &up32->msg_lrpid);
			if (err2)
				err = -EFAULT;
		}
		break;
	}

	return err;
}

static int
do_sys32_shmat (int first, int second, int third, int version, void *uptr)
{
	unsigned long raddr;
	u32 *uaddr = (u32 *)A((u32)third);
	int err = -EINVAL;

	if (version == 1)
		return err;
	if (version == 1)
		return err;
	err = sys_shmat (first, uptr, second, &raddr);
	if (err)
		return err;
	err = put_user (raddr, uaddr);
	return err;
}

static int
do_sys32_shmctl (int first, int second, void *uptr)
{
	int err = -EFAULT, err2;
	struct shmid_ds s;
	struct shmid64_ds s64;
	struct shmid_ds32 *up32 = (struct shmid_ds32 *)uptr;
	struct shmid64_ds32 *up64 = (struct shmid64_ds32 *)uptr;
	mm_segment_t old_fs;
	struct shm_info32 {
		int used_ids;
		u32 shm_tot, shm_rss, shm_swp;
		u32 swap_attempts, swap_successes;
	} *uip = (struct shm_info32 *)uptr;
	struct shm_info si;

	switch (second & ~IPC_64) {
	case IPC_INFO:
		second = IPC_INFO; /* So that we don't have to translate it */
	case IPC_RMID:
	case SHM_LOCK:
	case SHM_UNLOCK:
		err = sys_shmctl (first, second, (struct shmid_ds *)uptr);
		break;
	case IPC_SET:
		if (second & IPC_64) {
			err = get_user(s.shm_perm.uid, &up64->shm_perm.uid);
			err |= get_user(s.shm_perm.gid, &up64->shm_perm.gid);
			err |= get_user(s.shm_perm.mode, &up64->shm_perm.mode);
		} else {
			err = get_user(s.shm_perm.uid, &up32->shm_perm.uid);
			err |= get_user(s.shm_perm.gid, &up32->shm_perm.gid);
			err |= get_user(s.shm_perm.mode, &up32->shm_perm.mode);
		}
		if (err)
			break;
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_shmctl (first, second, &s);
		set_fs (old_fs);
		break;

	case IPC_STAT:
	case SHM_STAT:
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_shmctl (first, second, (void *) &s64);
		set_fs (old_fs);
		if (err < 0)
			break;
		if (second & IPC_64) {
			if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) {
				err = -EFAULT;
				break;
			}
			err2 = __put_user(s64.shm_perm.key, &up64->shm_perm.key);
			err2 |= __put_user(s64.shm_perm.uid, &up64->shm_perm.uid);
			err2 |= __put_user(s64.shm_perm.gid, &up64->shm_perm.gid);
			err2 |= __put_user(s64.shm_perm.cuid, &up64->shm_perm.cuid);
			err2 |= __put_user(s64.shm_perm.cgid, &up64->shm_perm.cgid);
			err2 |= __put_user(s64.shm_perm.mode, &up64->shm_perm.mode);
			err2 |= __put_user(s64.shm_perm.seq, &up64->shm_perm.seq);
			err2 |= __put_user(s64.shm_atime, &up64->shm_atime);
			err2 |= __put_user(s64.shm_dtime, &up64->shm_dtime);
			err2 |= __put_user(s64.shm_ctime, &up64->shm_ctime);
			err2 |= __put_user(s64.shm_segsz, &up64->shm_segsz);
			err2 |= __put_user(s64.shm_nattch, &up64->shm_nattch);
			err2 |= __put_user(s64.shm_cpid, &up64->shm_cpid);
			err2 |= __put_user(s64.shm_lpid, &up64->shm_lpid);
		} else {
			if (!access_ok(VERIFY_WRITE, up32, sizeof(*up32))) {
				err = -EFAULT;
				break;
			}
			err2 = __put_user(s64.shm_perm.key, &up32->shm_perm.key);
			err2 |= __put_user(s64.shm_perm.uid, &up32->shm_perm.uid);
			err2 |= __put_user(s64.shm_perm.gid, &up32->shm_perm.gid);
			err2 |= __put_user(s64.shm_perm.cuid, &up32->shm_perm.cuid);
			err2 |= __put_user(s64.shm_perm.cgid, &up32->shm_perm.cgid);
			err2 |= __put_user(s64.shm_perm.mode, &up32->shm_perm.mode);
			err2 |= __put_user(s64.shm_perm.seq, &up32->shm_perm.seq);
			err2 |= __put_user(s64.shm_atime, &up32->shm_atime);
			err2 |= __put_user(s64.shm_dtime, &up32->shm_dtime);
			err2 |= __put_user(s64.shm_ctime, &up32->shm_ctime);
			err2 |= __put_user(s64.shm_segsz, &up32->shm_segsz);
			err2 |= __put_user(s64.shm_nattch, &up32->shm_nattch);
			err2 |= __put_user(s64.shm_cpid, &up32->shm_cpid);
			err2 |= __put_user(s64.shm_lpid, &up32->shm_lpid);
		}
		if (err2)
			err = -EFAULT;
		break;

	case SHM_INFO:
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_shmctl (first, second, (void *)&si);
		set_fs (old_fs);
		if (err < 0)
			break;
		err2 = put_user (si.used_ids, &uip->used_ids);
		err2 |= __put_user (si.shm_tot, &uip->shm_tot);
		err2 |= __put_user (si.shm_rss, &uip->shm_rss);
		err2 |= __put_user (si.shm_swp, &uip->shm_swp);
		err2 |= __put_user (si.swap_attempts,
				    &uip->swap_attempts);
		err2 |= __put_user (si.swap_successes,
				    &uip->swap_successes);
		if (err2)
			err = -EFAULT;
		break;

	default:
		err = -ENOSYS;
		break;
	}

	return err;
}

asmlinkage long
sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth)
{
	int version, err;

	version = call >> 16; /* hack for backward compatibility */
	call &= 0xffff;

	switch (call) {

	case SEMOP:
		/* struct sembuf is the same on 32 and 64bit :)) */
		err = sys_semop (first, (struct sembuf *)AA(ptr),
				 second);
		break;
	case SEMGET:
		err = sys_semget (first, second, third);
		break;
	case SEMCTL:
		err = do_sys32_semctl (first, second, third,
				       (void *)AA(ptr));
		break;

	case MSGSND:
		err = do_sys32_msgsnd (first, second, third,
				       (void *)AA(ptr));
		break;
	case MSGRCV:
		err = do_sys32_msgrcv (first, second, fifth, third,
				       version, (void *)AA(ptr));
		break;
	case MSGGET:
		err = sys_msgget ((key_t) first, second);
		break;
	case MSGCTL:
		err = do_sys32_msgctl (first, second, (void *)AA(ptr));
		break;

	case SHMAT:
		err = do_sys32_shmat (first, second, third,
				      version, (void *)AA(ptr));
		break;
	case SHMDT:
		err = sys_shmdt ((char *)A(ptr));
		break;
	case SHMGET:
		err = sys_shmget (first, second, third);
		break;
	case SHMCTL:
		err = do_sys32_shmctl (first, second, (void *)AA(ptr));
		break;
	default:
		err = -EINVAL;
		break;
	}

	return err;
}

struct sysctl_args32
{
	compat_caddr_t name;
	int nlen;
	compat_caddr_t oldval;
	compat_caddr_t oldlenp;
	compat_caddr_t newval;
	compat_size_t newlen;
	unsigned int __unused[4];
};

#ifdef CONFIG_SYSCTL

asmlinkage long sys32_sysctl(struct sysctl_args32 *args)
{
	struct sysctl_args32 tmp;
	int error;
	size_t oldlen, *oldlenp = NULL;
	unsigned long addr = (((long)&args->__unused[0]) + 7) & ~7;

	if (copy_from_user(&tmp, args, sizeof(tmp)))
		return -EFAULT;

	if (tmp.oldval && tmp.oldlenp) {
		/* Duh, this is ugly and might not work if sysctl_args
		   is in read-only memory, but do_sysctl does indirectly
		   a lot of uaccess in both directions and we'd have to
		   basically copy the whole sysctl.c here, and
		   glibc's __sysctl uses rw memory for the structure
		   anyway.  */
		if (get_user(oldlen, (u32 *)A(tmp.oldlenp)) ||
		    put_user(oldlen, (size_t *)addr))
			return -EFAULT;
		oldlenp = (size_t *)addr;
	}

	lock_kernel();
	error = do_sysctl((int *)A(tmp.name), tmp.nlen, (void *)A(tmp.oldval),
			  oldlenp, (void *)A(tmp.newval), tmp.newlen);
	unlock_kernel();
	if (oldlenp) {
		if (!error) {
			if (get_user(oldlen, (size_t *)addr) ||
			    put_user(oldlen, (u32 *)A(tmp.oldlenp)))
				error = -EFAULT;
		}
		copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
	}
	return error;
}

#else /* CONFIG_SYSCTL */

asmlinkage long sys32_sysctl(struct sysctl_args32 *args)
{
	return -ENOSYS;
}

#endif /* CONFIG_SYSCTL */

extern asmlinkage int sys_sched_setaffinity(pid_t pid, unsigned int len,
					    unsigned long *user_mask_ptr);

asmlinkage int sys32_sched_setaffinity(compat_pid_t pid, unsigned int len,
				       u32 *user_mask_ptr)
{
	unsigned long kernel_mask;
	mm_segment_t old_fs;
	int ret;

	if (get_user(kernel_mask, user_mask_ptr))
		return -EFAULT;

	old_fs = get_fs();
	set_fs(KERNEL_DS);
	ret = sys_sched_setaffinity(pid,
				    /* XXX Nice api... */
				    sizeof(kernel_mask),
				    &kernel_mask);
	set_fs(old_fs);

	return ret;
}

extern asmlinkage int sys_sched_getaffinity(pid_t pid, unsigned int len,
					    unsigned long *user_mask_ptr);

asmlinkage int sys32_sched_getaffinity(compat_pid_t pid, unsigned int len,
				       u32 *user_mask_ptr)
{
	unsigned long kernel_mask;
	mm_segment_t old_fs;
	int ret;

	old_fs = get_fs();
	set_fs(KERNEL_DS);
	ret = sys_sched_getaffinity(pid,
				    /* XXX Nice api... */
				    sizeof(kernel_mask),
				    &kernel_mask);
	set_fs(old_fs);

	if (ret == 0) {
		if (put_user(kernel_mask, user_mask_ptr))
			ret = -EFAULT;
	}

	return ret;
}

asmlinkage long sys32_newuname(struct new_utsname * name)
{
	int ret = 0;

	down_read(&uts_sem);
	if (copy_to_user(name,&system_utsname,sizeof *name))
		ret = -EFAULT;
	up_read(&uts_sem);

	if (current->personality == PER_LINUX32 && !ret)
		if (copy_to_user(name->machine, "mips\0\0\0", 8))
			ret = -EFAULT;

	return ret;
}

extern asmlinkage long sys_personality(unsigned long);

asmlinkage int sys32_personality(unsigned long personality)
{
	int ret;
	if (current->personality == PER_LINUX32 && personality == PER_LINUX)
		personality = PER_LINUX32;
	ret = sys_personality(personality);
	if (ret == PER_LINUX32)
		ret = PER_LINUX;
	return ret;
}

/* Handle adjtimex compatibility. */

struct timex32 {
	u32 modes;
	s32 offset, freq, maxerror, esterror;
	s32 status, constant, precision, tolerance;
	struct compat_timeval time;
	s32 tick;
	s32 ppsfreq, jitter, shift, stabil;
	s32 jitcnt, calcnt, errcnt, stbcnt;
	s32  :32; s32  :32; s32  :32; s32  :32;
	s32  :32; s32  :32; s32  :32; s32  :32;
	s32  :32; s32  :32; s32  :32; s32  :32;
};

extern int do_adjtimex(struct timex *);

asmlinkage int sys32_adjtimex(struct timex32 *utp)
{
	struct timex txc;
	int ret;

	memset(&txc, 0, sizeof(struct timex));

	if (get_user(txc.modes, &utp->modes) ||
	   __get_user(txc.offset, &utp->offset) ||
	   __get_user(txc.freq, &utp->freq) ||
	   __get_user(txc.maxerror, &utp->maxerror) ||
	   __get_user(txc.esterror, &utp->esterror) ||
	   __get_user(txc.status, &utp->status) ||
	   __get_user(txc.constant, &utp->constant) ||
	   __get_user(txc.precision, &utp->precision) ||
	   __get_user(txc.tolerance, &utp->tolerance) ||
	   __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
	   __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
	   __get_user(txc.tick, &utp->tick) ||
	   __get_user(txc.ppsfreq, &utp->ppsfreq) ||
	   __get_user(txc.jitter, &utp->jitter) ||
	   __get_user(txc.shift, &utp->shift) ||
	   __get_user(txc.stabil, &utp->stabil) ||
	   __get_user(txc.jitcnt, &utp->jitcnt) ||
	   __get_user(txc.calcnt, &utp->calcnt) ||
	   __get_user(txc.errcnt, &utp->errcnt) ||
	   __get_user(txc.stbcnt, &utp->stbcnt))
		return -EFAULT;

	ret = do_adjtimex(&txc);

	if (put_user(txc.modes, &utp->modes) ||
	   __put_user(txc.offset, &utp->offset) ||
	   __put_user(txc.freq, &utp->freq) ||
	   __put_user(txc.maxerror, &utp->maxerror) ||
	   __put_user(txc.esterror, &utp->esterror) ||
	   __put_user(txc.status, &utp->status) ||
	   __put_user(txc.constant, &utp->constant) ||
	   __put_user(txc.precision, &utp->precision) ||
	   __put_user(txc.tolerance, &utp->tolerance) ||
	   __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
	   __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
	   __put_user(txc.tick, &utp->tick) ||
	   __put_user(txc.ppsfreq, &utp->ppsfreq) ||
	   __put_user(txc.jitter, &utp->jitter) ||
	   __put_user(txc.shift, &utp->shift) ||
	   __put_user(txc.stabil, &utp->stabil) ||
	   __put_user(txc.jitcnt, &utp->jitcnt) ||
	   __put_user(txc.calcnt, &utp->calcnt) ||
	   __put_user(txc.errcnt, &utp->errcnt) ||
	   __put_user(txc.stbcnt, &utp->stbcnt))
		ret = -EFAULT;

	return ret;
}

extern asmlinkage ssize_t sys_sendfile(int out_fd, int in_fd, off_t *offset, size_t count);

asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t *offset,
	s32 count)
{
	mm_segment_t old_fs = get_fs();
	int ret;
	off_t of;
	
	if (offset && get_user(of, offset))
		return -EFAULT;
		
	set_fs(KERNEL_DS);
	ret = sys_sendfile(out_fd, in_fd, offset ? &of : NULL, count);
	set_fs(old_fs);
	
	if (offset && put_user(of, offset))
		return -EFAULT;
		
	return ret;
}

asmlinkage ssize_t sys_readahead(int fd, loff_t offset, size_t count);

asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
                                   size_t count)
{
	return sys_readahead(fd, merge_64(a2, a3), count);
}

asmlinkage long compat_sys_utimes(char __user * filename,
	struct compat_timeval __user * utimes)
{
	struct timeval times[2];
                                                                                
	if (utimes) {
		if (verify_area(VERIFY_READ, utimes, 2 * sizeof(*utimes)))
			return -EFAULT;

		if (__get_user(times[0].tv_sec, &utimes[0].tv_sec) | 
		    __get_user(times[0].tv_usec, &utimes[0].tv_usec) | 
		    __get_user(times[1].tv_sec, &utimes[1].tv_sec) | 
		    __get_user(times[1].tv_usec, &utimes[1].tv_usec))
			return -EFAULT;
	}

	return do_utimes(filename, utimes ? times : NULL);
}
