Linux preempt-rt

Check our new training course

Real-Time Linux with PREEMPT_RT

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with Creative Commons CC-BY-SA
lecture and lab materials

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Elixir Cross Referencer

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/* $Id: sys_sparc32.c,v 1.166 2000/11/10 04:49:56 davem Exp $
 * sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
 *
 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * environment.
 */

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/fs.h> 
#include <linux/mm.h> 
#include <linux/file.h> 
#include <linux/signal.h>
#include <linux/utime.h>
#include <linux/resource.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/timex.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/malloc.h>
#include <linux/uio.h>
#include <linux/nfs_fs.h>
#include <linux/smb_fs.h>
#include <linux/smb_mount.h>
#include <linux/ncp_fs.h>
#include <linux/quota.h>
#include <linux/module.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/filter.h>
#include <linux/highmem.h>
#include <linux/highuid.h>
#include <linux/mman.h>
#include <linux/ipv6.h>
#include <linux/in.h>
#include <linux/icmpv6.h>
#include <linux/sysctl.h>

#include <asm/types.h>
#include <asm/ipc.h>
#include <asm/uaccess.h>
#include <asm/fpumacro.h>
#include <asm/semaphore.h>

#include <net/scm.h>

/* Use this to get at 32-bit user passed pointers. */
/* Things to consider: the low-level assembly stub does
   srl x, 0, x for first four arguments, so if you have
   pointer to something in the first four arguments, just
   declare it as a pointer, not u32. On the other side, 
   arguments from 5th onwards should be declared as u32
   for pointers, and need AA() around each usage.
   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.
   -jj
 */
#define A(__x) ((unsigned long)(__x))
#define AA(__x)				\
({	unsigned long __ret;		\
	__asm__ ("srl	%0, 0, %0"	\
		 : "=r" (__ret)		\
		 : "0" (__x));		\
	__ret;				\
})

extern asmlinkage long sys_chown(const char *, uid_t,gid_t);
extern asmlinkage long sys_lchown(const char *, uid_t,gid_t);
extern asmlinkage long sys_fchown(unsigned int, uid_t,gid_t);
extern asmlinkage long sys_setregid(gid_t, gid_t);
extern asmlinkage long sys_setgid(gid_t);
extern asmlinkage long sys_setreuid(uid_t, uid_t);
extern asmlinkage long sys_setuid(uid_t);
extern asmlinkage long sys_setresuid(uid_t, uid_t, uid_t);
extern asmlinkage long sys_setresgid(gid_t, gid_t, gid_t);
extern asmlinkage long sys_setfsuid(uid_t);
extern asmlinkage long sys_setfsgid(gid_t);
 
/* For this source file, we want overflow handling. */

#undef high2lowuid
#undef high2lowgid
#undef low2highuid
#undef low2highgid
#undef SET_UID16
#undef SET_GID16
#undef NEW_TO_OLD_UID
#undef NEW_TO_OLD_GID
#undef SET_OLDSTAT_UID
#undef SET_OLDSTAT_GID
#undef SET_STAT_UID
#undef SET_STAT_GID

#define high2lowuid(uid) ((uid) > 65535) ? (u16)overflowuid : (u16)(uid)
#define high2lowgid(gid) ((gid) > 65535) ? (u16)overflowgid : (u16)(gid)
#define low2highuid(uid) ((uid) == (u16)-1) ? (uid_t)-1 : (uid_t)(uid)
#define low2highgid(gid) ((gid) == (u16)-1) ? (gid_t)-1 : (gid_t)(gid)
#define SET_UID16(var, uid)	var = high2lowuid(uid)
#define SET_GID16(var, gid)	var = high2lowgid(gid)
#define NEW_TO_OLD_UID(uid)	high2lowuid(uid)
#define NEW_TO_OLD_GID(gid)	high2lowgid(gid)
#define SET_OLDSTAT_UID(stat, uid)	(stat).st_uid = high2lowuid(uid)
#define SET_OLDSTAT_GID(stat, gid)	(stat).st_gid = high2lowgid(gid)
#define SET_STAT_UID(stat, uid)		(stat).st_uid = high2lowuid(uid)
#define SET_STAT_GID(stat, gid)		(stat).st_gid = high2lowgid(gid)

asmlinkage long sys32_chown16(const char * filename, u16 user, u16 group)
{
	return sys_chown(filename, low2highuid(user), low2highgid(group));
}

asmlinkage long sys32_lchown16(const char * filename, u16 user, u16 group)
{
	return sys_lchown(filename, low2highuid(user), low2highgid(group));
}

asmlinkage long sys32_fchown16(unsigned int fd, u16 user, u16 group)
{
	return sys_fchown(fd, low2highuid(user), low2highgid(group));
}

asmlinkage long sys32_setregid16(u16 rgid, u16 egid)
{
	return sys_setregid(low2highgid(rgid), low2highgid(egid));
}

asmlinkage long sys32_setgid16(u16 gid)
{
	return sys_setgid((gid_t)gid);
}

asmlinkage long sys32_setreuid16(u16 ruid, u16 euid)
{
	return sys_setreuid(low2highuid(ruid), low2highuid(euid));
}

asmlinkage long sys32_setuid16(u16 uid)
{
	return sys_setuid((uid_t)uid);
}

asmlinkage long sys32_setresuid16(u16 ruid, u16 euid, u16 suid)
{
	return sys_setresuid(low2highuid(ruid), low2highuid(euid),
		low2highuid(suid));
}

asmlinkage long sys32_getresuid16(u16 *ruid, u16 *euid, u16 *suid)
{
	int retval;

	if (!(retval = put_user(high2lowuid(current->uid), ruid)) &&
	    !(retval = put_user(high2lowuid(current->euid), euid)))
		retval = put_user(high2lowuid(current->suid), suid);

	return retval;
}

asmlinkage long sys32_setresgid16(u16 rgid, u16 egid, u16 sgid)
{
	return sys_setresgid(low2highgid(rgid), low2highgid(egid),
		low2highgid(sgid));
}

asmlinkage long sys32_getresgid16(u16 *rgid, u16 *egid, u16 *sgid)
{
	int retval;

	if (!(retval = put_user(high2lowgid(current->gid), rgid)) &&
	    !(retval = put_user(high2lowgid(current->egid), egid)))
		retval = put_user(high2lowgid(current->sgid), sgid);

	return retval;
}

asmlinkage long sys32_setfsuid16(u16 uid)
{
	return sys_setfsuid((uid_t)uid);
}

asmlinkage long sys32_setfsgid16(u16 gid)
{
	return sys_setfsgid((gid_t)gid);
}

asmlinkage long sys32_getgroups16(int gidsetsize, u16 *grouplist)
{
	u16 groups[NGROUPS];
	int i,j;

	if (gidsetsize < 0)
		return -EINVAL;
	i = current->ngroups;
	if (gidsetsize) {
		if (i > gidsetsize)
			return -EINVAL;
		for(j=0;j<i;j++)
			groups[j] = current->groups[j];
		if (copy_to_user(grouplist, groups, sizeof(u16)*i))
			return -EFAULT;
	}
	return i;
}

asmlinkage long sys32_setgroups16(int gidsetsize, u16 *grouplist)
{
	u16 groups[NGROUPS];
	int i;

	if (!capable(CAP_SETGID))
		return -EPERM;
	if ((unsigned) gidsetsize > NGROUPS)
		return -EINVAL;
	if (copy_from_user(groups, grouplist, gidsetsize * sizeof(u16)))
		return -EFAULT;
	for (i = 0 ; i < gidsetsize ; i++)
		current->groups[i] = (gid_t)groups[i];
	current->ngroups = gidsetsize;
	return 0;
}

asmlinkage long sys32_getuid16(void)
{
	return high2lowuid(current->uid);
}

asmlinkage long sys32_geteuid16(void)
{
	return high2lowuid(current->euid);
}

asmlinkage long sys32_getgid16(void)
{
	return high2lowgid(current->gid);
}

asmlinkage long sys32_getegid16(void)
{
	return high2lowgid(current->egid);
}

/* 32-bit timeval and related flotsam.  */

struct timeval32
{
    int tv_sec, tv_usec;
};

struct itimerval32
{
    struct timeval32 it_interval;
    struct timeval32 it_value;
};

static inline long get_tv32(struct timeval *o, struct timeval32 *i)
{
	return (!access_ok(VERIFY_READ, tv32, sizeof(*tv32)) ||
		(__get_user(o->tv_sec, &i->tv_sec) |
		 __get_user(o->tv_usec, &i->tv_usec)));
}

static inline long put_tv32(struct timeval32 *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)));
}

static inline long get_it32(struct itimerval *o, struct itimerval32 *i)
{
	return (!access_ok(VERIFY_READ, i32, sizeof(*i32)) ||
		(__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
		 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
		 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
		 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
}

static inline long put_it32(struct itimerval32 *o, struct itimerval *i)
{
	return (!access_ok(VERIFY_WRITE, i32, sizeof(*i32)) ||
		(__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
		 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
		 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
		 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
}

extern asmlinkage int sys_ioperm(unsigned long from, unsigned long num, int on);

asmlinkage int sys32_ioperm(u32 from, u32 num, int on)
{
	return sys_ioperm((unsigned long)from, (unsigned long)num, on);
}

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

struct ipc_perm32
{
	key_t    	  key;
        __kernel_uid_t32  uid;
        __kernel_gid_t32  gid;
        __kernel_uid_t32  cuid;
        __kernel_gid_t32  cgid;
        __kernel_mode_t32 mode;
        unsigned short  seq;
};

struct semid_ds32 {
        struct ipc_perm32 sem_perm;               /* permissions .. see ipc.h */
        __kernel_time_t32 sem_otime;              /* last semop time */
        __kernel_time_t32 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_perm sem_perm;		  /* this structure is the same on sparc32 and sparc64 */
	unsigned int	  __pad1;
	__kernel_time_t32 sem_otime;
	unsigned int	  __pad2;
	__kernel_time_t32 sem_ctime;
	u32 sem_nsems;
	u32 __unused1;
	u32 __unused2;
};

struct msqid_ds32
{
        struct ipc_perm32 msg_perm;
        u32 msg_first;
        u32 msg_last;
        __kernel_time_t32 msg_stime;
        __kernel_time_t32 msg_rtime;
        __kernel_time_t32 msg_ctime;
        u32 wwait;
        u32 rwait;
        unsigned short msg_cbytes;
        unsigned short msg_qnum;  
        unsigned short msg_qbytes;
        __kernel_ipc_pid_t32 msg_lspid;
        __kernel_ipc_pid_t32 msg_lrpid;
};

struct msqid64_ds32 {
	struct ipc64_perm msg_perm;
	unsigned int   __pad1;
	__kernel_time_t32 msg_stime;
	unsigned int   __pad2;
	__kernel_time_t32 msg_rtime;
	unsigned int   __pad3;
	__kernel_time_t32 msg_ctime;
	unsigned int  msg_cbytes;
	unsigned int  msg_qnum;
	unsigned int  msg_qbytes;
	__kernel_pid_t32 msg_lspid;
	__kernel_pid_t32 msg_lrpid;
	unsigned int  __unused1;
	unsigned int  __unused2;
};


struct shmid_ds32 {
	struct ipc_perm32       shm_perm;
	int                     shm_segsz;
	__kernel_time_t32       shm_atime;
	__kernel_time_t32       shm_dtime;
	__kernel_time_t32       shm_ctime;
	__kernel_ipc_pid_t32    shm_cpid; 
	__kernel_ipc_pid_t32    shm_lpid; 
	unsigned short          shm_nattch;
};

struct shmid64_ds32 {
	struct ipc64_perm	shm_perm;
	unsigned int		__pad1;
	__kernel_time_t32	shm_atime;
	unsigned int		__pad2;
	__kernel_time_t32	shm_dtime;
	unsigned int		__pad3;
	__kernel_time_t32	shm_ctime;
	__kernel_size_t32	shm_segsz;
	__kernel_pid_t32	shm_cpid;
	__kernel_pid_t32	shm_lpid;
	unsigned int		shm_nattch;
	unsigned int		__unused1;
	unsigned int		__unused2;
};

                                                        
/*
 * sys32_ipc() is the de-multiplexer for the SysV IPC calls in 32bit emulation..
 *
 * This is really horribly ugly.
 */
#define IPCOP_MASK(__x)	(1UL << (__x))
static int do_sys32_semctl(int first, int second, int third, void *uptr)
{
	union semun fourth;
	u32 pad;
	int err = -EINVAL;

	if (!uptr)
		goto out;
	err = -EFAULT;
	if (get_user (pad, (u32 *)uptr))
		goto out;
	if(third == SETVAL)
		fourth.val = (int)pad;
	else
		fourth.__pad = (void *)A(pad);
	if (IPCOP_MASK (third) &
	    (IPCOP_MASK (IPC_INFO) | IPCOP_MASK (SEM_INFO) | IPCOP_MASK (GETVAL) |
	     IPCOP_MASK (GETPID) | IPCOP_MASK (GETNCNT) | IPCOP_MASK (GETZCNT) |
	     IPCOP_MASK (GETALL) | IPCOP_MASK (SETALL) | IPCOP_MASK (IPC_RMID))) {
		err = sys_semctl (first, second, third, fourth);
	} else if (third & IPC_64) {
		struct semid64_ds s;
		struct semid64_ds32 *usp = (struct semid64_ds32 *)A(pad);
		mm_segment_t old_fs;
		int need_back_translation;

		if (third == (IPC_SET|IPC_64)) {
			err = get_user (s.sem_perm.uid, &usp->sem_perm.uid);
			err |= __get_user (s.sem_perm.gid, &usp->sem_perm.gid);
			err |= __get_user (s.sem_perm.mode, &usp->sem_perm.mode);
			if (err)
				goto out;
			fourth.__pad = &s;
		}
		need_back_translation =
			(IPCOP_MASK (third) &
			 (IPCOP_MASK (SEM_STAT) | IPCOP_MASK (IPC_STAT))) != 0;
		if (need_back_translation)
			fourth.__pad = &s;
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_semctl (first, second, third, fourth);
		set_fs (old_fs);
		if (need_back_translation) {
			int err2 = copy_to_user (&usp->sem_perm, &s.sem_perm, sizeof(struct ipc64_perm) + 2*sizeof(time_t));
			err2 |= __put_user (s.sem_nsems, &usp->sem_nsems);
			if (err2) err = -EFAULT;
		}
	} else {
		struct semid_ds s;
		struct semid_ds32 *usp = (struct semid_ds32 *)A(pad);
		mm_segment_t old_fs;
		int need_back_translation;

		if (third == IPC_SET) {
			err = get_user (s.sem_perm.uid, &usp->sem_perm.uid);
			err |= __get_user (s.sem_perm.gid, &usp->sem_perm.gid);
			err |= __get_user (s.sem_perm.mode, &usp->sem_perm.mode);
			if (err)
				goto out;
			fourth.__pad = &s;
		}
		need_back_translation =
			(IPCOP_MASK (third) &
			 (IPCOP_MASK (SEM_STAT) | IPCOP_MASK (IPC_STAT))) != 0;
		if (need_back_translation)
			fourth.__pad = &s;
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_semctl (first, second, third, fourth);
		set_fs (old_fs);
		if (need_back_translation) {
			int err2 = put_user (s.sem_perm.key, &usp->sem_perm.key);
			err2 |= __put_user (high2lowuid(s.sem_perm.uid), &usp->sem_perm.uid);
			err2 |= __put_user (high2lowgid(s.sem_perm.gid), &usp->sem_perm.gid);
			err2 |= __put_user (high2lowuid(s.sem_perm.cuid), &usp->sem_perm.cuid);
			err2 |= __put_user (high2lowgid(s.sem_perm.cgid), &usp->sem_perm.cgid);
			err2 |= __put_user (s.sem_perm.mode, &usp->sem_perm.mode);
			err2 |= __put_user (s.sem_perm.seq, &usp->sem_perm.seq);
			err2 |= __put_user (s.sem_otime, &usp->sem_otime);
			err2 |= __put_user (s.sem_ctime, &usp->sem_ctime);
			err2 |= __put_user (s.sem_nsems, &usp->sem_nsems);
			if (err2) err = -EFAULT;
		}
	}
out:
	return err;
}

static int do_sys32_msgsnd (int first, int second, int third, void *uptr)
{
	struct msgbuf *p = kmalloc (second + sizeof (struct msgbuf) + 4, GFP_USER);
	struct msgbuf32 *up = (struct msgbuf32 *)uptr;
	mm_segment_t old_fs;
	int err;

	if (!p)
		return -ENOMEM;
	err = get_user (p->mtype, &up->mtype);
	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_kludge *uipck = (struct ipc_kludge *)uptr;
		struct ipc_kludge ipck;

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

	if (IPCOP_MASK (second) &
	    (IPCOP_MASK (IPC_INFO) | IPCOP_MASK (MSG_INFO) |
	     IPCOP_MASK (IPC_RMID))) {
		err = sys_msgctl (first, second, (struct msqid_ds *)uptr);
	} else if (second & IPC_64) {
		struct msqid64_ds m;
		struct msqid64_ds32 *up = (struct msqid64_ds32 *)uptr;
		mm_segment_t old_fs;

		if (second == (IPC_SET|IPC_64)) {
			err = get_user (m.msg_perm.uid, &up->msg_perm.uid);
			err |= __get_user (m.msg_perm.gid, &up->msg_perm.gid);
			err |= __get_user (m.msg_perm.mode, &up->msg_perm.mode);
			err |= __get_user (m.msg_qbytes, &up->msg_qbytes);
			if (err)
				goto out;
		}
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_msgctl (first, second, (struct msqid_ds *)&m);
		set_fs (old_fs);
		if (IPCOP_MASK (second) &
		    (IPCOP_MASK (MSG_STAT) | IPCOP_MASK (IPC_STAT))) {
			int err2 = copy_to_user(&up->msg_perm, &m.msg_perm, sizeof(struct ipc64_perm) + 3*sizeof(time_t));
			err2 |= __put_user (m.msg_cbytes, &up->msg_cbytes);
			err2 |= __put_user (m.msg_qnum, &up->msg_qnum);
			err2 |= __put_user (m.msg_qbytes, &up->msg_qbytes);
			err2 |= __put_user (m.msg_lspid, &up->msg_lspid);
			err2 |= __put_user (m.msg_lrpid, &up->msg_lrpid);
			if (err2)
				err = -EFAULT;
		}
	} else {
		struct msqid_ds m;
		struct msqid_ds32 *up = (struct msqid_ds32 *)uptr;
		mm_segment_t old_fs;

		if (second == IPC_SET) {
			err = get_user (m.msg_perm.uid, &up->msg_perm.uid);
			err |= __get_user (m.msg_perm.gid, &up->msg_perm.gid);
			err |= __get_user (m.msg_perm.mode, &up->msg_perm.mode);
			err |= __get_user (m.msg_qbytes, &up->msg_qbytes);
			if (err)
				goto out;
		}
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_msgctl (first, second, &m);
		set_fs (old_fs);
		if (IPCOP_MASK (second) &
		    (IPCOP_MASK (MSG_STAT) | IPCOP_MASK (IPC_STAT))) {
			int err2 = put_user (m.msg_perm.key, &up->msg_perm.key);
			err2 |= __put_user (high2lowuid(m.msg_perm.uid), &up->msg_perm.uid);
			err2 |= __put_user (high2lowgid(m.msg_perm.gid), &up->msg_perm.gid);
			err2 |= __put_user (high2lowuid(m.msg_perm.cuid), &up->msg_perm.cuid);
			err2 |= __put_user (high2lowgid(m.msg_perm.cgid), &up->msg_perm.cgid);
			err2 |= __put_user (m.msg_perm.mode, &up->msg_perm.mode);
			err2 |= __put_user (m.msg_perm.seq, &up->msg_perm.seq);
			err2 |= __put_user (m.msg_stime, &up->msg_stime);
			err2 |= __put_user (m.msg_rtime, &up->msg_rtime);
			err2 |= __put_user (m.msg_ctime, &up->msg_ctime);
			err2 |= __put_user (m.msg_cbytes, &up->msg_cbytes);
			err2 |= __put_user (m.msg_qnum, &up->msg_qnum);
			err2 |= __put_user (m.msg_qbytes, &up->msg_qbytes);
			err2 |= __put_user (m.msg_lspid, &up->msg_lspid);
			err2 |= __put_user (m.msg_lrpid, &up->msg_lrpid);
			if (err2)
				err = -EFAULT;
		}
	}

out:
	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)
		goto out;
	err = sys_shmat (first, uptr, second, &raddr);
	if (err)
		goto out;
	err = put_user (raddr, uaddr);
out:
	return err;
}

static int do_sys32_shmctl (int first, int second, void *uptr)
{
	int err;

	if (IPCOP_MASK (second) &
	    (IPCOP_MASK (IPC_INFO) | IPCOP_MASK (SHM_LOCK) | IPCOP_MASK (SHM_UNLOCK) |
	     IPCOP_MASK (IPC_RMID))) {
		if (second == (IPC_INFO|IPC_64))
			second = IPC_INFO; /* So that we don't have to translate it */
		err = sys_shmctl (first, second, (struct shmid_ds *)uptr);
	} else if ((second & IPC_64) && second != (SHM_INFO|IPC_64)) {
		struct shmid64_ds s;
		struct shmid64_ds32 *up = (struct shmid64_ds32 *)uptr;
		mm_segment_t old_fs;

		if (second == (IPC_SET|IPC_64)) {
			err = get_user (s.shm_perm.uid, &up->shm_perm.uid);
			err |= __get_user (s.shm_perm.gid, &up->shm_perm.gid);
			err |= __get_user (s.shm_perm.mode, &up->shm_perm.mode);
			if (err)
				goto out;
		}
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_shmctl (first, second, (struct shmid_ds *)&s);
		set_fs (old_fs);
		if (err < 0)
			goto out;

		/* Mask it even in this case so it becomes a CSE. */
		if (IPCOP_MASK (second) &
		    (IPCOP_MASK (SHM_STAT) | IPCOP_MASK (IPC_STAT))) {
			int err2 = copy_to_user (&up->shm_perm, &s.shm_perm, sizeof(struct ipc64_perm) + 3*sizeof(time_t));
			err2 |= __put_user (s.shm_segsz, &up->shm_segsz);
			err2 |= __put_user (s.shm_nattch, &up->shm_nattch);
			err2 |= __put_user (s.shm_cpid, &up->shm_cpid);
			err2 |= __put_user (s.shm_lpid, &up->shm_lpid);
			if (err2)
				err = -EFAULT;
		}
	} else {
		struct shmid_ds s;
		struct shmid_ds32 *up = (struct shmid_ds32 *)uptr;
		mm_segment_t old_fs;

		second &= ~IPC_64;
		if (second == IPC_SET) {
			err = get_user (s.shm_perm.uid, &up->shm_perm.uid);
			err |= __get_user (s.shm_perm.gid, &up->shm_perm.gid);
			err |= __get_user (s.shm_perm.mode, &up->shm_perm.mode);
			if (err)
				goto out;
		}
		old_fs = get_fs ();
		set_fs (KERNEL_DS);
		err = sys_shmctl (first, second, &s);
		set_fs (old_fs);
		if (err < 0)
			goto out;

		/* Mask it even in this case so it becomes a CSE. */
		if (second == SHM_INFO) {
			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 *kp = (struct shm_info *)&s;
			int err2 = put_user (kp->used_ids, &uip->used_ids);
			err2 |= __put_user (kp->shm_tot, &uip->shm_tot);
			err2 |= __put_user (kp->shm_rss, &uip->shm_rss);
			err2 |= __put_user (kp->shm_swp, &uip->shm_swp);
			err2 |= __put_user (kp->swap_attempts, &uip->swap_attempts);
			err2 |= __put_user (kp->swap_successes, &uip->swap_successes);
			if (err2)
				err = -EFAULT;
		} else if (IPCOP_MASK (second) &
			   (IPCOP_MASK (SHM_STAT) | IPCOP_MASK (IPC_STAT))) {
			int err2 = put_user (s.shm_perm.key, &up->shm_perm.key);
			err2 |= __put_user (high2lowuid(s.shm_perm.uid), &up->shm_perm.uid);
			err2 |= __put_user (high2lowuid(s.shm_perm.gid), &up->shm_perm.gid);
			err2 |= __put_user (high2lowuid(s.shm_perm.cuid), &up->shm_perm.cuid);
			err2 |= __put_user (high2lowuid(s.shm_perm.cgid), &up->shm_perm.cgid);
			err2 |= __put_user (s.shm_perm.mode, &up->shm_perm.mode);
			err2 |= __put_user (s.shm_perm.seq, &up->shm_perm.seq);
			err2 |= __put_user (s.shm_atime, &up->shm_atime);
			err2 |= __put_user (s.shm_dtime, &up->shm_dtime);
			err2 |= __put_user (s.shm_ctime, &up->shm_ctime);
			err2 |= __put_user (s.shm_segsz, &up->shm_segsz);
			err2 |= __put_user (s.shm_nattch, &up->shm_nattch);
			err2 |= __put_user (s.shm_cpid, &up->shm_cpid);
			err2 |= __put_user (s.shm_lpid, &up->shm_lpid);
			if (err2)
				err = -EFAULT;
		}
	}
out:
	return err;
}

asmlinkage int 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;

	if (call <= SEMCTL)
		switch (call) {
		case SEMOP:
			/* struct sembuf is the same on 32 and 64bit :)) */
			err = sys_semop (first, (struct sembuf *)AA(ptr), second);
			goto out;
		case SEMGET:
			err = sys_semget (first, second, third);
			goto out;
		case SEMCTL:
			err = do_sys32_semctl (first, second, third, (void *)AA(ptr));
			goto out;
		default:
			err = -EINVAL;
			goto out;
		};
	if (call <= MSGCTL) 
		switch (call) {
		case MSGSND:
			err = do_sys32_msgsnd (first, second, third, (void *)AA(ptr));
			goto out;
		case MSGRCV:
			err = do_sys32_msgrcv (first, second, fifth, third,
					       version, (void *)AA(ptr));
			goto out;
		case MSGGET:
			err = sys_msgget ((key_t) first, second);
			goto out;
		case MSGCTL:
			err = do_sys32_msgctl (first, second, (void *)AA(ptr));
			goto out;
		default:
			err = -EINVAL;
			goto out;
		}
	if (call <= SHMCTL) 
		switch (call) {
		case SHMAT:
			err = do_sys32_shmat (first, second, third,
					      version, (void *)AA(ptr));
			goto out;
		case SHMDT: 
			err = sys_shmdt ((char *)AA(ptr));
			goto out;
		case SHMGET:
			err = sys_shmget (first, second, third);
			goto out;
		case SHMCTL:
			err = do_sys32_shmctl (first, second, (void *)AA(ptr));
			goto out;
		default:
			err = -EINVAL;
			goto out;
		}

	err = -EINVAL;

out:
	return err;
}

static inline int get_flock(struct flock *kfl, struct flock32 *ufl)
{
	int err;
	
	err = get_user(kfl->l_type, &ufl->l_type);
	err |= __get_user(kfl->l_whence, &ufl->l_whence);
	err |= __get_user(kfl->l_start, &ufl->l_start);
	err |= __get_user(kfl->l_len, &ufl->l_len);
	err |= __get_user(kfl->l_pid, &ufl->l_pid);
	return err;
}

static inline int put_flock(struct flock *kfl, struct flock32 *ufl)
{
	int err;
	
	err = __put_user(kfl->l_type, &ufl->l_type);
	err |= __put_user(kfl->l_whence, &ufl->l_whence);
	err |= __put_user(kfl->l_start, &ufl->l_start);
	err |= __put_user(kfl->l_len, &ufl->l_len);
	err |= __put_user(kfl->l_pid, &ufl->l_pid);
	return err;
}

extern asmlinkage long sys_fcntl(unsigned int fd, unsigned int cmd, unsigned long arg);

asmlinkage long sys32_fcntl(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	switch (cmd) {
	case F_GETLK:
	case F_SETLK:
	case F_SETLKW:
		{
			struct flock f;
			mm_segment_t old_fs;
			long ret;
			
			if(get_flock(&f, (struct flock32 *)arg))
				return -EFAULT;
			old_fs = get_fs(); set_fs (KERNEL_DS);
			ret = sys_fcntl(fd, cmd, (unsigned long)&f);
			set_fs (old_fs);
			if (ret) return ret;
			if (f.l_start >= 0x7fffffffUL ||
			    f.l_len >= 0x7fffffffUL ||
			    f.l_start + f.l_len >= 0x7fffffffUL)
				return -EOVERFLOW;
			if(put_flock(&f, (struct flock32 *)arg))
				return -EFAULT;
			return 0;
		}
	default:
		return sys_fcntl(fd, cmd, (unsigned long)arg);
	}
}

asmlinkage long sys32_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
{
	if (cmd >= F_GETLK64 && cmd <= F_SETLKW64)
		return sys_fcntl(fd, cmd + F_GETLK - F_GETLK64, arg);
	return sys32_fcntl(fd, cmd, arg);
}

struct dqblk32 {
    __u32 dqb_bhardlimit;
    __u32 dqb_bsoftlimit;
    __u32 dqb_curblocks;
    __u32 dqb_ihardlimit;
    __u32 dqb_isoftlimit;
    __u32 dqb_curinodes;
    __kernel_time_t32 dqb_btime;
    __kernel_time_t32 dqb_itime;
};
                                
extern asmlinkage int sys_quotactl(int cmd, const char *special, int id, caddr_t addr);

asmlinkage int sys32_quotactl(int cmd, const char *special, int id, unsigned long addr)
{
	int cmds = cmd >> SUBCMDSHIFT;
	int err;
	struct dqblk d;
	mm_segment_t old_fs;
	char *spec;
	
	switch (cmds) {
	case Q_GETQUOTA:
		break;
	case Q_SETQUOTA:
	case Q_SETUSE:
	case Q_SETQLIM:
		if (copy_from_user (&d, (struct dqblk32 *)addr,
				    sizeof (struct dqblk32)))
			return -EFAULT;
		d.dqb_itime = ((struct dqblk32 *)&d)->dqb_itime;
		d.dqb_btime = ((struct dqblk32 *)&d)->dqb_btime;
		break;
	default:
		return sys_quotactl(cmd, special,
				    id, (caddr_t)addr);
	}
	spec = getname (special);
	err = PTR_ERR(spec);
	if (IS_ERR(spec)) return err;
	old_fs = get_fs ();
	set_fs (KERNEL_DS);
	err = sys_quotactl(cmd, (const char *)spec, id, (caddr_t)&d);
	set_fs (old_fs);
	putname (spec);
	if (cmds == Q_GETQUOTA) {
		__kernel_time_t b = d.dqb_btime, i = d.dqb_itime;
		((struct dqblk32 *)&d)->dqb_itime = i;
		((struct dqblk32 *)&d)->dqb_btime = b;
		if (copy_to_user ((struct dqblk32 *)addr, &d,
				  sizeof (struct dqblk32)))
			return -EFAULT;
	}
	return err;
}

static inline int put_statfs (struct statfs32 *ubuf, struct statfs *kbuf)
{
	int err;
	
	err = put_user (kbuf->f_type, &ubuf->f_type);
	err |= __put_user (kbuf->f_bsize, &ubuf->f_bsize);
	err |= __put_user (kbuf->f_blocks, &ubuf->f_blocks);
	err |= __put_user (kbuf->f_bfree, &ubuf->f_bfree);
	err |= __put_user (kbuf->f_bavail, &ubuf->f_bavail);
	err |= __put_user (kbuf->f_files, &ubuf->f_files);
	err |= __put_user (kbuf->f_ffree, &ubuf->f_ffree);
	err |= __put_user (kbuf->f_namelen, &ubuf->f_namelen);
	err |= __put_user (kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]);
	err |= __put_user (kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]);
	return err;
}

extern asmlinkage int sys_statfs(const char * path, struct statfs * buf);

asmlinkage int sys32_statfs(const char * path, struct statfs32 *buf)
{
	int ret;
	struct statfs s;
	mm_segment_t old_fs = get_fs();
	char *pth;
	
	pth = getname (path);
	ret = PTR_ERR(pth);
	if (!IS_ERR(pth)) {
		set_fs (KERNEL_DS);
		ret = sys_statfs((const char *)pth, &s);
		set_fs (old_fs);
		putname (pth);
		if (put_statfs(buf, &s))
			return -EFAULT;
	}
	return ret;
}

extern asmlinkage int sys_fstatfs(unsigned int fd, struct statfs * buf);

asmlinkage int sys32_fstatfs(unsigned int fd, struct statfs32 *buf)
{
	int ret;
	struct statfs s;
	mm_segment_t old_fs = get_fs();
	
	set_fs (KERNEL_DS);
	ret = sys_fstatfs(fd, &s);
	set_fs (old_fs);
	if (put_statfs(buf, &s))
		return -EFAULT;
	return ret;
}

extern asmlinkage long sys_truncate(const char * path, unsigned long length);
extern asmlinkage long sys_ftruncate(unsigned int fd, unsigned long length);

asmlinkage int sys32_truncate64(const char * path, unsigned long high, unsigned long low)
{
	if ((int)high < 0)
		return -EINVAL;
	else
		return sys_truncate(path, (high << 32) | low);
}

asmlinkage int sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
{
	if ((int)high < 0)
		return -EINVAL;
	else
		return sys_ftruncate(fd, (high << 32) | low);
}

extern asmlinkage int sys_utime(char * filename, struct utimbuf * times);

struct utimbuf32 {
	__kernel_time_t32 actime, modtime;
};

asmlinkage int sys32_utime(char * filename, struct utimbuf32 *times)
{
	struct utimbuf t;
	mm_segment_t old_fs;
	int ret;
	char *filenam;
	
	if (!times)
		return sys_utime(filename, NULL);
	if (get_user (t.actime, &times->actime) ||
	    __get_user (t.modtime, &times->modtime))
		return -EFAULT;
	filenam = getname (filename);
	ret = PTR_ERR(filenam);
	if (!IS_ERR(filenam)) {
		old_fs = get_fs();
		set_fs (KERNEL_DS); 
		ret = sys_utime(filenam, &t);
		set_fs (old_fs);
		putname (filenam);
	}
	return ret;
}

struct iovec32 { u32 iov_base; __kernel_size_t32 iov_len; };

typedef ssize_t (*io_fn_t)(struct file *, char *, size_t, loff_t *);
typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);

static long do_readv_writev32(int type, struct file *file,
			      const struct iovec32 *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;
	iov_fn_t fnv;

	/* 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 iovec32)*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)
		goto out;

	/* VERIFY_WRITE actually means a read, as we write to user space */
	fnv = (type == VERIFY_WRITE ? file->f_op->readv : file->f_op->writev);
	if (fnv) {
		retval = fnv(file, iov, count, &file->f_pos);
		goto out;
	}

	fn = (type == VERIFY_WRITE ? file->f_op->read :
	      (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)
				retval = nr;
			break;
		}
		retval += nr;
		if (nr != len)
			break;
	}
out:
	if (iov != iovstack)
		kfree(iov);

	return retval;
}

asmlinkage long sys32_readv(int fd, struct iovec32 *vector, u32 count)
{
	struct file *file;
	long 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 iovec32 *vector, u32 count)
{
	struct file *file;
	int 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;
}

/* readdir & getdents */

#define NAME_OFFSET(de) ((int) ((de)->d_name - (char *) (de)))
#define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))

struct old_linux_dirent32 {
	u32		d_ino;
	u32		d_offset;
	unsigned short	d_namlen;
	char		d_name[1];
};

struct readdir_callback32 {
	struct old_linux_dirent32 * dirent;
	int count;
};

static int fillonedir(void * __buf, const char * name, int namlen,
		      off_t offset, ino_t ino, unsigned int d_type)
{
	struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;
	struct old_linux_dirent32 * dirent;

	if (buf->count)
		return -EINVAL;
	buf->count++;
	dirent = buf->dirent;
	put_user(ino, &dirent->d_ino);
	put_user(offset, &dirent->d_offset);
	put_user(namlen, &dirent->d_namlen);
	copy_to_user(dirent->d_name, name, namlen);
	put_user(0, dirent->d_name + namlen);
	return 0;
}

asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 *dirent, unsigned int count)
{
	int error = -EBADF;
	struct file * file;
	struct readdir_callback32 buf;

	file = fget(fd);
	if (!file)
		goto out;

	buf.count = 0;
	buf.dirent = dirent;

	error = vfs_readdir(file, fillonedir, &buf);
	if (error < 0)
		goto out_putf;
	error = buf.count;

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

struct linux_dirent32 {
	u32		d_ino;
	u32		d_off;
	unsigned short	d_reclen;
	char		d_name[1];
};

struct getdents_callback32 {
	struct linux_dirent32 * current_dir;
	struct linux_dirent32 * previous;
	int count;
	int error;
};

static int filldir(void * __buf, const char * name, int namlen, off_t offset, ino_t ino,
		   unsigned int d_type)
{
	struct linux_dirent32 * dirent;
	struct getdents_callback32 * buf = (struct getdents_callback32 *) __buf;
	int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1);

	buf->error = -EINVAL;	/* only used if we fail.. */
	if (reclen > buf->count)
		return -EINVAL;
	dirent = buf->previous;
	if (dirent)
		put_user(offset, &dirent->d_off);
	dirent = buf->current_dir;
	buf->previous = dirent;
	put_user(ino, &dirent->d_ino);
	put_user(reclen, &dirent->d_reclen);
	copy_to_user(dirent->d_name, name, namlen);
	put_user(0, dirent->d_name + namlen);
	((char *) dirent) += reclen;
	buf->current_dir = dirent;
	buf->count -= reclen;
	return 0;
}

asmlinkage int sys32_getdents(unsigned int fd, struct linux_dirent32 *dirent, unsigned int count)
{
	struct file * file;
	struct linux_dirent32 * lastdirent;
	struct getdents_callback32 buf;
	int error = -EBADF;

	file = fget(fd);
	if (!file)
		goto out;

	buf.current_dir = dirent;
	buf.previous = NULL;
	buf.count = count;
	buf.error = 0;

	error = vfs_readdir(file, filldir, &buf);
	if (error < 0)
		goto out_putf;
	lastdirent = buf.previous;
	error = buf.error;
	if(lastdirent) {
		put_user(file->f_pos, &lastdirent->d_off);
		error = count - buf.count;
	}
out_putf:
	fput(file);
out:
	return error;
}

/* end of readdir & getdents */

/*
 * 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);
}

#define MAX_SELECT_SECONDS \
	((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)

asmlinkage int sys32_select(int n, u32 *inp, u32 *outp, u32 *exp, u32 tvp_x)
{
	fd_set_bits fds;
	struct timeval32 *tvp = (struct timeval32 *)AA(tvp_x);
	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;
}

static int cp_new_stat32(struct inode *inode, struct stat32 *statbuf)
{
	unsigned long ino, blksize, blocks;
	kdev_t dev, rdev;
	umode_t mode;
	nlink_t nlink;
	uid_t uid;
	gid_t gid;
	off_t size;
	time_t atime, mtime, ctime;
	int err;

	/* Stream the loads of inode data into the load buffer,
	 * then we push it all into the store buffer below.  This
	 * should give optimal cache performance.
	 */
	ino = inode->i_ino;
	dev = inode->i_dev;
	mode = inode->i_mode;
	nlink = inode->i_nlink;
	uid = inode->i_uid;
	gid = inode->i_gid;
	rdev = inode->i_rdev;
	size = inode->i_size;
	atime = inode->i_atime;
	mtime = inode->i_mtime;
	ctime = inode->i_ctime;
	blksize = inode->i_blksize;
	blocks = inode->i_blocks;

	err  = put_user(kdev_t_to_nr(dev), &statbuf->st_dev);
	err |= put_user(ino, &statbuf->st_ino);
	err |= put_user(mode, &statbuf->st_mode);
	err |= put_user(nlink, &statbuf->st_nlink);
	err |= put_user(high2lowuid(uid), &statbuf->st_uid);
	err |= put_user(high2lowgid(gid), &statbuf->st_gid);
	err |= put_user(kdev_t_to_nr(rdev), &statbuf->st_rdev);
	err |= put_user(size, &statbuf->st_size);
	err |= put_user(atime, &statbuf->st_atime);
	err |= put_user(0, &statbuf->__unused1);
	err |= put_user(mtime, &statbuf->st_mtime);
	err |= put_user(0, &statbuf->__unused2);
	err |= put_user(ctime, &statbuf->st_ctime);
	err |= put_user(0, &statbuf->__unused3);
	if (blksize) {
		err |= put_user(blksize, &statbuf->st_blksize);
		err |= put_user(blocks, &statbuf->st_blocks);
	} else {
		unsigned int tmp_blocks;

#define D_B   7
#define I_B   (BLOCK_SIZE / sizeof(unsigned short))
		tmp_blocks = (size + BLOCK_SIZE - 1) / BLOCK_SIZE;
		if (tmp_blocks > D_B) {
			unsigned int indirect;

			indirect = (tmp_blocks - D_B + I_B - 1) / I_B;
			tmp_blocks += indirect;
			if (indirect > 1) {
				indirect = (indirect - 1 + I_B - 1) / I_B;
				tmp_blocks += indirect;
				if (indirect > 1)
					tmp_blocks++;
			}
		}
		err |= put_user(BLOCK_SIZE, &statbuf->st_blksize);
		err |= put_user((BLOCK_SIZE / 512) * tmp_blocks, &statbuf->st_blocks);
#undef D_B
#undef I_B
	}
	err |= put_user(0, &statbuf->__unused4[0]);
	err |= put_user(0, &statbuf->__unused4[1]);

	return err;
}

/* Perhaps this belongs in fs.h or similar. -DaveM */
static __inline__ int
do_revalidate(struct dentry *dentry)
{
	struct inode * inode = dentry->d_inode;
	if (inode->i_op && inode->i_op->revalidate)
		return inode->i_op->revalidate(dentry);
	return 0;
}

asmlinkage int sys32_newstat(char * filename, struct stat32 *statbuf)
{
	struct nameidata nd;
	int error;

	error = user_path_walk(filename, &nd);
	if (!error) {
		error = do_revalidate(nd.dentry);
		if (!error)
			error = cp_new_stat32(nd.dentry->d_inode, statbuf);
		path_release(&nd);
	}
	return error;
}

asmlinkage int sys32_newlstat(char * filename, struct stat32 *statbuf)
{
	struct nameidata nd;
	int error;

	error = user_path_walk_link(filename, &nd);
	if (!error) {
		error = do_revalidate(nd.dentry);
		if (!error)
			error = cp_new_stat32(nd.dentry->d_inode, statbuf);

		path_release(&nd);
	}
	return error;
}

asmlinkage int sys32_newfstat(unsigned int fd, struct stat32 *statbuf)
{
	struct file *f;
	int err = -EBADF;

	f = fget(fd);
	if (f) {
		struct dentry * dentry = f->f_dentry;

		err = do_revalidate(dentry);
		if (!err)
			err = cp_new_stat32(dentry->d_inode, statbuf);
		fput(f);
	}
	return err;
}

extern asmlinkage int sys_sysfs(int option, unsigned long arg1, unsigned long arg2);

asmlinkage int sys32_sysfs(int option, u32 arg1, u32 arg2)
{
	return sys_sysfs(option, arg1, arg2);
}

struct ncp_mount_data32 {
        int version;
        unsigned int ncp_fd;
        __kernel_uid_t32 mounted_uid;
        __kernel_pid_t32 wdog_pid;
        unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
        unsigned int time_out;
        unsigned int retry_count;
        unsigned int flags;
        __kernel_uid_t32 uid;
        __kernel_gid_t32 gid;
        __kernel_mode_t32 file_mode;
        __kernel_mode_t32 dir_mode;
};

static void *do_ncp_super_data_conv(void *raw_data)
{
	struct ncp_mount_data news, *n = &news; 
	struct ncp_mount_data32 *n32 = (struct ncp_mount_data32 *)raw_data;

	n->dir_mode = n32->dir_mode;
	n->file_mode = n32->file_mode;
	n->gid = low2highgid(n32->gid);
	n->uid = low2highuid(n32->uid);
	memmove (n->mounted_vol, n32->mounted_vol, (sizeof (n32->mounted_vol) + 3 * sizeof (unsigned int)));
	n->wdog_pid = n32->wdog_pid;
	n->mounted_uid = low2highuid(n32->mounted_uid);
	memcpy(raw_data, n, sizeof(struct ncp_mount_data)); 
	return raw_data;
}

struct smb_mount_data32 {
        int version;
        __kernel_uid_t32 mounted_uid;
        __kernel_uid_t32 uid;
        __kernel_gid_t32 gid;
        __kernel_mode_t32 file_mode;
        __kernel_mode_t32 dir_mode;
};

static void *do_smb_super_data_conv(void *raw_data)
{
	struct smb_mount_data news, *s = &news;
	struct smb_mount_data32 *s32 = (struct smb_mount_data32 *)raw_data;

	s->version = s32->version;
	s->mounted_uid = low2highuid(s32->mounted_uid);
	s->uid = low2highuid(s32->uid);
	s->gid = low2highgid(s32->gid);
	s->file_mode = s32->file_mode;
	s->dir_mode = s32->dir_mode;
	memcpy(raw_data, s, sizeof(struct smb_mount_data)); 
	return raw_data;
}

static int copy_mount_stuff_to_kernel(const void *user, unsigned long *kernel)
{
	int i;
	unsigned long page;
	struct vm_area_struct *vma;

	*kernel = 0;
	if(!user)
		return 0;
	vma = find_vma(current->mm, (unsigned long)user);
	if(!vma || (unsigned long)user < vma->vm_start)
		return -EFAULT;
	if(!(vma->vm_flags & VM_READ))
		return -EFAULT;
	i = vma->vm_end - (unsigned long) user;
	if(PAGE_SIZE <= (unsigned long) i)
		i = PAGE_SIZE - 1;
	if(!(page = __get_free_page(GFP_KERNEL)))
		return -ENOMEM;
	if(copy_from_user((void *) page, user, i)) {
		free_page(page);
		return -EFAULT;
	}
	*kernel = page;
	return 0;
}

#define SMBFS_NAME	"smbfs"
#define NCPFS_NAME	"ncpfs"

asmlinkage int sys32_mount(char *dev_name, char *dir_name, char *type, unsigned long new_flags, u32 data)
{
	unsigned long type_page = 0;
	unsigned long data_page = 0;
	unsigned long dev_page = 0;
	unsigned long dir_page = 0;
	int err, is_smb, is_ncp;

	is_smb = is_ncp = 0;

	err = copy_mount_stuff_to_kernel((const void *)type, &type_page);
	if (err)
		goto out;

	if (!type_page) {
		err = -EINVAL;
		goto out;
	}

	is_smb = !strcmp((char *)type_page, SMBFS_NAME);
	is_ncp = !strcmp((char *)type_page, NCPFS_NAME);

	err = copy_mount_stuff_to_kernel((const void *)AA(data), &data_page);
	if (err)
		goto type_out;

	err = copy_mount_stuff_to_kernel(dev_name, &dev_page);
	if (err)
		goto data_out;

	err = copy_mount_stuff_to_kernel(dir_name, &dir_page);
	if (err)
		goto dev_out;

	if (!is_smb && !is_ncp) {
		lock_kernel();
		err = do_mount((char*)dev_page, (char*)dir_page,
				(char*)type_page, new_flags, (char*)data_page);
		unlock_kernel();
	} else {
		if (is_ncp)
			do_ncp_super_data_conv((void *)data_page);
		else
			do_smb_super_data_conv((void *)data_page);

		lock_kernel();
		err = do_mount((char*)dev_page, (char*)dir_page,
				(char*)type_page, new_flags, (char*)data_page);
		unlock_kernel();
	}
	free_page(dir_page);

dev_out:
	free_page(dev_page);

data_out:
	free_page(data_page);

type_out:
	free_page(type_page);

out:
	return err;
}

struct rusage32 {
        struct timeval32 ru_utime;
        struct timeval32 ru_stime;
        s32    ru_maxrss;
        s32    ru_ixrss;
        s32    ru_idrss;
        s32    ru_isrss;
        s32    ru_minflt;
        s32    ru_majflt;
        s32    ru_nswap;
        s32    ru_inblock;
        s32    ru_oublock;
        s32    ru_msgsnd; 
        s32    ru_msgrcv; 
        s32    ru_nsignals;
        s32    ru_nvcsw;
        s32    ru_nivcsw;
};

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

extern asmlinkage int sys_wait4(pid_t pid,unsigned int * stat_addr,
				int options, struct rusage * ru);

asmlinkage int sys32_wait4(__kernel_pid_t32 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;
	}
}

struct sysinfo32 {
        s32 uptime;
        u32 loads[3];
        u32 totalram;
        u32 freeram;
        u32 sharedram;
        u32 bufferram;
        u32 totalswap;
        u32 freeswap;
        unsigned short procs;
        char _f[22];
};

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);
	if (err)
		return -EFAULT;
	return ret;
}

struct timespec32 {
	s32    tv_sec;
	s32    tv_nsec;
};
                
extern asmlinkage int sys_sched_rr_get_interval(pid_t pid, struct timespec *interval);

asmlinkage int sys32_sched_rr_get_interval(__kernel_pid_t32 pid, struct timespec32 *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;
}

extern asmlinkage int sys_nanosleep(struct timespec *rqtp, struct timespec *rmtp);

asmlinkage int sys32_nanosleep(struct timespec32 *rqtp, struct timespec32 *rmtp)
{
	struct timespec t;
	int ret;
	mm_segment_t old_fs = get_fs ();
	
	if (get_user (t.tv_sec, &rqtp->tv_sec) ||
	    __get_user (t.tv_nsec, &rqtp->tv_nsec))
		return -EFAULT;
	set_fs (KERNEL_DS);
	ret = sys_nanosleep(&t, rmtp ? &t : NULL);
	set_fs (old_fs);
	if (rmtp && ret == -EINTR) {
		if (__put_user (t.tv_sec, &rmtp->tv_sec) ||
	    	    __put_user (t.tv_nsec, &rmtp->tv_nsec))
			return -EFAULT;
	}
	return ret;
}

extern asmlinkage int sys_sigprocmask(int how, old_sigset_t *set, old_sigset_t *oset);

asmlinkage int sys32_sigprocmask(int how, old_sigset_t32 *set, old_sigset_t32 *oset)
{
	old_sigset_t s;
	int ret;
	mm_segment_t old_fs = get_fs();
	
	if (set && get_user (s, set)) return -EFAULT;
	set_fs (KERNEL_DS);
	ret = sys_sigprocmask(how, set ? &s : NULL, oset ? &s : NULL);
	set_fs (old_fs);
	if (ret) return ret;
	if (oset && put_user (s, oset)) return -EFAULT;
	return 0;
}

extern asmlinkage int sys_rt_sigprocmask(int how, sigset_t *set, sigset_t *oset, size_t sigsetsize);

asmlinkage int sys32_rt_sigprocmask(int how, sigset_t32 *set, sigset_t32 *oset, __kernel_size_t32 sigsetsize)
{
	sigset_t s;
	sigset_t32 s32;
	int ret;
	mm_segment_t old_fs = get_fs();
	
	if (set) {
		if (copy_from_user (&s32, set, sizeof(sigset_t32)))
			return -EFAULT;
		switch (_NSIG_WORDS) {
		case 4: s.sig[3] = s32.sig[6] | (((long)s32.sig[7]) << 32);
		case 3: s.sig[2] = s32.sig[4] | (((long)s32.sig[5]) << 32);
		case 2: s.sig[1] = s32.sig[2] | (((long)s32.sig[3]) << 32);
		case 1: s.sig[0] = s32.sig[0] | (((long)s32.sig[1]) << 32);
		}
	}
	set_fs (KERNEL_DS);
	ret = sys_rt_sigprocmask(how, set ? &s : NULL, oset ? &s : NULL, sigsetsize);
	set_fs (old_fs);
	if (ret) return ret;
	if (oset) {
		switch (_NSIG_WORDS) {
		case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
		case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
		case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
		case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
		}
		if (copy_to_user (oset, &s32, sizeof(sigset_t32)))
			return -EFAULT;
	}
	return 0;
}

extern asmlinkage int sys_sigpending(old_sigset_t *set);

asmlinkage int sys32_sigpending(old_sigset_t32 *set)
{
	old_sigset_t s;
	int ret;
	mm_segment_t old_fs = get_fs();
		
	set_fs (KERNEL_DS);
	ret = sys_sigpending(&s);
	set_fs (old_fs);
	if (put_user (s, set)) return -EFAULT;
	return ret;
}

extern asmlinkage int sys_rt_sigpending(sigset_t *set, size_t sigsetsize);

asmlinkage int sys32_rt_sigpending(sigset_t32 *set, __kernel_size_t32 sigsetsize)
{
	sigset_t s;
	sigset_t32 s32;
	int ret;
	mm_segment_t old_fs = get_fs();
		
	set_fs (KERNEL_DS);
	ret = sys_rt_sigpending(&s, sigsetsize);
	set_fs (old_fs);
	if (!ret) {
		switch (_NSIG_WORDS) {
		case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
		case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
		case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
		case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
		}
		if (copy_to_user (set, &s32, sizeof(sigset_t32)))
			return -EFAULT;
	}
	return ret;
}

asmlinkage int
sys32_rt_sigtimedwait(sigset_t32 *uthese, siginfo_t32 *uinfo,
		      struct timespec32 *uts, __kernel_size_t32 sigsetsize)
{
	int ret, sig;
	sigset_t these;
	sigset_t32 these32;
	struct timespec ts;
	siginfo_t info;
	long timeout = 0;

	/* XXX: Don't preclude handling different sized sigset_t's.  */
	if (sigsetsize != sizeof(sigset_t))
		return -EINVAL;

	if (copy_from_user (&these32, uthese, sizeof(sigset_t32)))
		return -EFAULT;

	switch (_NSIG_WORDS) {
	case 4: these.sig[3] = these32.sig[6] | (((long)these32.sig[7]) << 32);
	case 3: these.sig[2] = these32.sig[4] | (((long)these32.sig[5]) << 32);
	case 2: these.sig[1] = these32.sig[2] | (((long)these32.sig[3]) << 32);
	case 1: these.sig[0] = these32.sig[0] | (((long)these32.sig[1]) << 32);
	}
		
	/*
	 * Invert the set of allowed signals to get those we
	 * want to block.
	 */
	sigdelsetmask(&these, sigmask(SIGKILL)|sigmask(SIGSTOP));
	signotset(&these);

	if (uts) {
		if (get_user (ts.tv_sec, &uts->tv_sec) ||
		    get_user (ts.tv_nsec, &uts->tv_nsec))
			return -EINVAL;
		if (ts.tv_nsec >= 1000000000L || ts.tv_nsec < 0
		    || ts.tv_sec < 0)
			return -EINVAL;
	}

	spin_lock_irq(&current->sigmask_lock);
	sig = dequeue_signal(&these, &info);
	if (!sig) {
		/* None ready -- temporarily unblock those we're interested
		   in so that we'll be awakened when they arrive.  */
		sigset_t oldblocked = current->blocked;
		sigandsets(&current->blocked, &current->blocked, &these);
		recalc_sigpending(current);
		spin_unlock_irq(&current->sigmask_lock);

		timeout = MAX_SCHEDULE_TIMEOUT;
		if (uts)
			timeout = (timespec_to_jiffies(&ts)
				   + (ts.tv_sec || ts.tv_nsec));

		current->state = TASK_INTERRUPTIBLE;
		timeout = schedule_timeout(timeout);

		spin_lock_irq(&current->sigmask_lock);
		sig = dequeue_signal(&these, &info);
		current->blocked = oldblocked;
		recalc_sigpending(current);
	}
	spin_unlock_irq(&current->sigmask_lock);

	if (sig) {
		ret = sig;
		if (uinfo) {
			if (copy_siginfo_to_user32(uinfo, &info))
				ret = -EFAULT;
		}
	} else {
		ret = -EAGAIN;
		if (timeout)
			ret = -EINTR;
	}

	return ret;
}

extern asmlinkage int
sys_rt_sigqueueinfo(int pid, int sig, siginfo_t *uinfo);

asmlinkage int
sys32_rt_sigqueueinfo(int pid, int sig, siginfo_t32 *uinfo)
{
	siginfo_t info;
	int ret;
	mm_segment_t old_fs = get_fs();
	
	if (copy_from_user (&info, uinfo, 3*sizeof(int)) ||
	    copy_from_user (info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE))
		return -EFAULT;
	set_fs (KERNEL_DS);
	ret = sys_rt_sigqueueinfo(pid, sig, &info);
	set_fs (old_fs);
	return ret;
}

struct tms32 {
	__kernel_clock_t32 tms_utime;
	__kernel_clock_t32 tms_stime;
	__kernel_clock_t32 tms_cutime;
	__kernel_clock_t32 tms_cstime;
};
                                
extern asmlinkage long sys_times(struct tms * tbuf);

asmlinkage long sys32_times(struct tms32 *tbuf)
{
	struct tms t;
	long ret;
	mm_segment_t old_fs = get_fs ();
	int err;
	
	set_fs (KERNEL_DS);
	ret = sys_times(tbuf ? &t : NULL);
	set_fs (old_fs);
	if (tbuf) {
		err = put_user (t.tms_utime, &tbuf->tms_utime);
		err |= __put_user (t.tms_stime, &tbuf->tms_stime);
		err |= __put_user (t.tms_cutime, &tbuf->tms_cutime);
		err |= __put_user (t.tms_cstime, &tbuf->tms_cstime);
		if (err)
			ret = -EFAULT;
	}
	return ret;
}

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

struct rlimit32 {
	u32	rlim_cur;
	u32	rlim_max;
};

extern asmlinkage int sys_getrlimit(unsigned int resource, struct rlimit *rlim);

asmlinkage int sys32_getrlimit(unsigned int resource, struct rlimit32 *rlim)
{
	struct rlimit r;
	int ret;
	mm_segment_t old_fs = get_fs ();
	
	set_fs (KERNEL_DS);
	ret = sys_getrlimit(resource, &r);
	set_fs (old_fs);
	if (!ret) {
		ret = put_user (RESOURCE32(r.rlim_cur), &rlim->rlim_cur);
		ret |= __put_user (RESOURCE32(r.rlim_max), &rlim->rlim_max);
	}
	return ret;
}

extern asmlinkage int sys_setrlimit(unsigned int resource, struct rlimit *rlim);

asmlinkage int sys32_setrlimit(unsigned int resource, struct rlimit32 *rlim)
{
	struct rlimit r;
	int ret;
	mm_segment_t old_fs = get_fs ();

	if (resource >= RLIM_NLIMITS) return -EINVAL;	
	if (get_user (r.rlim_cur, &rlim->rlim_cur) ||
	    __get_user (r.rlim_max, &rlim->rlim_max))
		return -EFAULT;
	if (r.rlim_cur == RLIM_INFINITY32)
		r.rlim_cur = RLIM_INFINITY;
	if (r.rlim_max == RLIM_INFINITY32)
		r.rlim_max = RLIM_INFINITY;
	set_fs (KERNEL_DS);
	ret = sys_setrlimit(resource, &r);
	set_fs (old_fs);
	return ret;
}

extern asmlinkage int sys_getrusage(int who, struct rusage *ru);

asmlinkage int sys32_getrusage(int who, struct rusage32 *ru)
{
	struct rusage r;
	int ret;
	mm_segment_t old_fs = get_fs();
		
	set_fs (KERNEL_DS);
	ret = sys_getrusage(who, &r);
	set_fs (old_fs);
	if (put_rusage (ru, &r)) return -EFAULT;
	return ret;
}

/* XXX This really belongs in some header file... -DaveM */
#define MAX_SOCK_ADDR	128		/* 108 for Unix domain - 
					   16 for IP, 16 for IPX,
					   24 for IPv6,
					   about 80 for AX.25 */

extern struct socket *sockfd_lookup(int fd, int *err);

/* XXX This as well... */
extern __inline__ void sockfd_put(struct socket *sock)
{
	fput(sock->file);
}

struct msghdr32 {
        u32               msg_name;
        int               msg_namelen;
        u32               msg_iov;
        __kernel_size_t32 msg_iovlen;
        u32               msg_control;
        __kernel_size_t32 msg_controllen;
        unsigned          msg_flags;
};

struct cmsghdr32 {
        __kernel_size_t32 cmsg_len;
        int               cmsg_level;
        int               cmsg_type;
};

/* Bleech... */
#define __CMSG32_NXTHDR(ctl, len, cmsg, cmsglen) __cmsg32_nxthdr((ctl),(len),(cmsg),(cmsglen))
#define CMSG32_NXTHDR(mhdr, cmsg, cmsglen) cmsg32_nxthdr((mhdr), (cmsg), (cmsglen))

#define CMSG32_ALIGN(len) ( ((len)+sizeof(int)-1) & ~(sizeof(int)-1) )

#define CMSG32_DATA(cmsg)	((void *)((char *)(cmsg) + CMSG32_ALIGN(sizeof(struct cmsghdr32))))
#define CMSG32_SPACE(len) (CMSG32_ALIGN(sizeof(struct cmsghdr32)) + CMSG32_ALIGN(len))
#define CMSG32_LEN(len) (CMSG32_ALIGN(sizeof(struct cmsghdr32)) + (len))

#define __CMSG32_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr32) ? \
				    (struct cmsghdr32 *)(ctl) : \
				    (struct cmsghdr32 *)NULL)
#define CMSG32_FIRSTHDR(msg)	__CMSG32_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)

__inline__ struct cmsghdr32 *__cmsg32_nxthdr(void *__ctl, __kernel_size_t __size,
					      struct cmsghdr32 *__cmsg, int __cmsg_len)
{
	struct cmsghdr32 * __ptr;

	__ptr = (struct cmsghdr32 *)(((unsigned char *) __cmsg) +
				     CMSG32_ALIGN(__cmsg_len));
	if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
		return NULL;

	return __ptr;
}

__inline__ struct cmsghdr32 *cmsg32_nxthdr (struct msghdr *__msg,
					    struct cmsghdr32 *__cmsg,
					    int __cmsg_len)
{
	return __cmsg32_nxthdr(__msg->msg_control, __msg->msg_controllen,
			       __cmsg, __cmsg_len);
}

static inline int iov_from_user32_to_kern(struct iovec *kiov,
					  struct iovec32 *uiov32,
					  int niov)
{
	int tot_len = 0;

	while(niov > 0) {
		u32 len, buf;

		if(get_user(len, &uiov32->iov_len) ||
		   get_user(buf, &uiov32->iov_base)) {
			tot_len = -EFAULT;
			break;
		}
		tot_len += len;
		kiov->iov_base = (void *)A(buf);
		kiov->iov_len = (__kernel_size_t) len;
		uiov32++;
		kiov++;
		niov--;
	}
	return tot_len;
}

static inline int msghdr_from_user32_to_kern(struct msghdr *kmsg,
					     struct msghdr32 *umsg)
{
	u32 tmp1, tmp2, tmp3;
	int err;

	err = get_user(tmp1, &umsg->msg_name);
	err |= __get_user(tmp2, &umsg->msg_iov);
	err |= __get_user(tmp3, &umsg->msg_control);
	if (err)
		return -EFAULT;

	kmsg->msg_name = (void *)A(tmp1);
	kmsg->msg_iov = (struct iovec *)A(tmp2);
	kmsg->msg_control = (void *)A(tmp3);

	err = get_user(kmsg->msg_namelen, &umsg->msg_namelen);
	err |= get_user(kmsg->msg_iovlen, &umsg->msg_iovlen);
	err |= get_user(kmsg->msg_controllen, &umsg->msg_controllen);
	err |= get_user(kmsg->msg_flags, &umsg->msg_flags);
	
	return err;
}

/* I've named the args so it is easy to tell whose space the pointers are in. */
static int verify_iovec32(struct msghdr *kern_msg, struct iovec *kern_iov,
			  char *kern_address, int mode)
{
	int tot_len;

	if(kern_msg->msg_namelen) {
		if(mode==VERIFY_READ) {
			int err = move_addr_to_kernel(kern_msg->msg_name,
						      kern_msg->msg_namelen,
						      kern_address);
			if(err < 0)
				return err;
		}
		kern_msg->msg_name = kern_address;
	} else
		kern_msg->msg_name = NULL;

	if(kern_msg->msg_iovlen > UIO_FASTIOV) {
		kern_iov = kmalloc(kern_msg->msg_iovlen * sizeof(struct iovec),
				   GFP_KERNEL);
		if(!kern_iov)
			return -ENOMEM;
	}

	tot_len = iov_from_user32_to_kern(kern_iov,
					  (struct iovec32 *)kern_msg->msg_iov,
					  kern_msg->msg_iovlen);
	if(tot_len >= 0)
		kern_msg->msg_iov = kern_iov;
	else if(kern_msg->msg_iovlen > UIO_FASTIOV)
		kfree(kern_iov);

	return tot_len;
}

/* There is a lot of hair here because the alignment rules (and
 * thus placement) of cmsg headers and length are different for
 * 32-bit apps.  -DaveM
 */
static int cmsghdr_from_user32_to_kern(struct msghdr *kmsg,
				       unsigned char *stackbuf, int stackbuf_size)
{
	struct cmsghdr32 *ucmsg;
	struct cmsghdr *kcmsg, *kcmsg_base;
	__kernel_size_t32 ucmlen;
	__kernel_size_t kcmlen, tmp;

	kcmlen = 0;
	kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
	ucmsg = CMSG32_FIRSTHDR(kmsg);
	while(ucmsg != NULL) {
		if(get_user(ucmlen, &ucmsg->cmsg_len))
			return -EFAULT;

		/* Catch bogons. */
		if(CMSG32_ALIGN(ucmlen) <
		   CMSG32_ALIGN(sizeof(struct cmsghdr32)))
			return -EINVAL;
		if((unsigned long)(((char *)ucmsg - (char *)kmsg->msg_control)
				   + ucmlen) > kmsg->msg_controllen)
			return -EINVAL;

		tmp = ((ucmlen - CMSG32_ALIGN(sizeof(*ucmsg))) +
		       CMSG_ALIGN(sizeof(struct cmsghdr)));
		kcmlen += tmp;
		ucmsg = CMSG32_NXTHDR(kmsg, ucmsg, ucmlen);
	}
	if(kcmlen == 0)
		return -EINVAL;

	/* The kcmlen holds the 64-bit version of the control length.
	 * It may not be modified as we do not stick it into the kmsg
	 * until we have successfully copied over all of the data
	 * from the user.
	 */
	if(kcmlen > stackbuf_size)
		kcmsg_base = kcmsg = kmalloc(kcmlen, GFP_KERNEL);
	if(kcmsg == NULL)
		return -ENOBUFS;

	/* Now copy them over neatly. */
	memset(kcmsg, 0, kcmlen);
	ucmsg = CMSG32_FIRSTHDR(kmsg);
	while(ucmsg != NULL) {
		__get_user(ucmlen, &ucmsg->cmsg_len);
		tmp = ((ucmlen - CMSG32_ALIGN(sizeof(*ucmsg))) +
		       CMSG_ALIGN(sizeof(struct cmsghdr)));
		kcmsg->cmsg_len = tmp;
		__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level);
		__get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type);

		/* Copy over the data. */
		if(copy_from_user(CMSG_DATA(kcmsg),
				  CMSG32_DATA(ucmsg),
				  (ucmlen - CMSG32_ALIGN(sizeof(*ucmsg)))))
			goto out_free_efault;

		/* Advance. */
		kcmsg = (struct cmsghdr *)((char *)kcmsg + CMSG_ALIGN(tmp));
		ucmsg = CMSG32_NXTHDR(kmsg, ucmsg, ucmlen);
	}

	/* Ok, looks like we made it.  Hook it up and return success. */
	kmsg->msg_control = kcmsg_base;
	kmsg->msg_controllen = kcmlen;
	return 0;

out_free_efault:
	if(kcmsg_base != (struct cmsghdr *)stackbuf)
		kfree(kcmsg_base);
	return -EFAULT;
}

static void put_cmsg32(struct msghdr *kmsg, int level, int type,
		       int len, void *data)
{
	struct cmsghdr32 *cm = (struct cmsghdr32 *) kmsg->msg_control;
	struct cmsghdr32 cmhdr;
	int cmlen = CMSG32_LEN(len);

	if(cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
		kmsg->msg_flags |= MSG_CTRUNC;
		return;
	}

	if(kmsg->msg_controllen < cmlen) {
		kmsg->msg_flags |= MSG_CTRUNC;
		cmlen = kmsg->msg_controllen;
	}
	cmhdr.cmsg_level = level;
	cmhdr.cmsg_type = type;
	cmhdr.cmsg_len = cmlen;

	if(copy_to_user(cm, &cmhdr, sizeof cmhdr))
		return;
	if(copy_to_user(CMSG32_DATA(cm), data, cmlen - sizeof(struct cmsghdr32)))
		return;
	cmlen = CMSG32_SPACE(len);
	kmsg->msg_control += cmlen;
	kmsg->msg_controllen -= cmlen;
}

static void scm_detach_fds32(struct msghdr *kmsg, struct scm_cookie *scm)
{
	struct cmsghdr32 *cm = (struct cmsghdr32 *) kmsg->msg_control;
	int fdmax = (kmsg->msg_controllen - sizeof(struct cmsghdr32)) / sizeof(int);
	int fdnum = scm->fp->count;
	struct file **fp = scm->fp->fp;
	int *cmfptr;
	int err = 0, i;

	if (fdnum < fdmax)
		fdmax = fdnum;

	for (i = 0, cmfptr = (int *) CMSG32_DATA(cm); i < fdmax; i++, cmfptr++) {
		int new_fd;
		err = get_unused_fd();
		if (err < 0)
			break;
		new_fd = err;
		err = put_user(new_fd, cmfptr);
		if (err) {
			put_unused_fd(new_fd);
			break;
		}
		/* Bump the usage count and install the file. */
		get_file(fp[i]);
		fd_install(new_fd, fp[i]);
	}

	if (i > 0) {
		int cmlen = CMSG32_LEN(i * sizeof(int));
		if (!err)
			err = put_user(SOL_SOCKET, &cm->cmsg_level);
		if (!err)
			err = put_user(SCM_RIGHTS, &cm->cmsg_type);
		if (!err)
			err = put_user(cmlen, &cm->cmsg_len);
		if (!err) {
			cmlen = CMSG32_SPACE(i * sizeof(int));
			kmsg->msg_control += cmlen;
			kmsg->msg_controllen -= cmlen;
		}
	}
	if (i < fdnum)
		kmsg->msg_flags |= MSG_CTRUNC;

	/*
	 * All of the files that fit in the message have had their
	 * usage counts incremented, so we just free the list.
	 */
	__scm_destroy(scm);
}

/* In these cases we (currently) can just copy to data over verbatim
 * because all CMSGs created by the kernel have well defined types which
 * have the same layout in both the 32-bit and 64-bit API.  One must add
 * some special cased conversions here if we start sending control messages
 * with incompatible types.
 *
 * SCM_RIGHTS and SCM_CREDENTIALS are done by hand in recvmsg32 right after
 * we do our work.  The remaining cases are:
 *
 * SOL_IP	IP_PKTINFO	struct in_pktinfo	32-bit clean
 *		IP_TTL		int			32-bit clean
 *		IP_TOS		__u8			32-bit clean
 *		IP_RECVOPTS	variable length		32-bit clean
 *		IP_RETOPTS	variable length		32-bit clean
 *		(these last two are clean because the types are defined
 *		 by the IPv4 protocol)
 *		IP_RECVERR	struct sock_extended_err +
 *				struct sockaddr_in	32-bit clean
 * SOL_IPV6	IPV6_RECVERR	struct sock_extended_err +
 *				struct sockaddr_in6	32-bit clean
 *		IPV6_PKTINFO	struct in6_pktinfo	32-bit clean
 *		IPV6_HOPLIMIT	int			32-bit clean
 *		IPV6_FLOWINFO	u32			32-bit clean
 *		IPV6_HOPOPTS	ipv6 hop exthdr		32-bit clean
 *		IPV6_DSTOPTS	ipv6 dst exthdr(s)	32-bit clean
 *		IPV6_RTHDR	ipv6 routing exthdr	32-bit clean
 *		IPV6_AUTHHDR	ipv6 auth exthdr	32-bit clean
 */
static void cmsg32_recvmsg_fixup(struct msghdr *kmsg, unsigned long orig_cmsg_uptr)
{
	unsigned char *workbuf, *wp;
	unsigned long bufsz, space_avail;
	struct cmsghdr *ucmsg;

	bufsz = ((unsigned long)kmsg->msg_control) - orig_cmsg_uptr;
	space_avail = kmsg->msg_controllen + bufsz;
	wp = workbuf = kmalloc(bufsz, GFP_KERNEL);
	if(workbuf == NULL)
		goto fail;

	/* To make this more sane we assume the kernel sends back properly
	 * formatted control messages.  Because of how the kernel will truncate
	 * the cmsg_len for MSG_TRUNC cases, we need not check that case either.
	 */
	ucmsg = (struct cmsghdr *) orig_cmsg_uptr;
	while(((unsigned long)ucmsg) <=
	      (((unsigned long)kmsg->msg_control) - sizeof(struct cmsghdr))) {
		struct cmsghdr32 *kcmsg32 = (struct cmsghdr32 *) wp;
		int clen64, clen32;

		/* UCMSG is the 64-bit format CMSG entry in user-space.
		 * KCMSG32 is within the kernel space temporary buffer
		 * we use to convert into a 32-bit style CMSG.
		 */
		__get_user(kcmsg32->cmsg_len, &ucmsg->cmsg_len);
		__get_user(kcmsg32->cmsg_level, &ucmsg->cmsg_level);
		__get_user(kcmsg32->cmsg_type, &ucmsg->cmsg_type);

		clen64 = kcmsg32->cmsg_len;
		copy_from_user(CMSG32_DATA(kcmsg32), CMSG_DATA(ucmsg),
			       clen64 - CMSG_ALIGN(sizeof(*ucmsg)));
		clen32 = ((clen64 - CMSG_ALIGN(sizeof(*ucmsg))) +
			  CMSG32_ALIGN(sizeof(struct cmsghdr32)));
		kcmsg32->cmsg_len = clen32;

		ucmsg = (struct cmsghdr *) (((char *)ucmsg) + CMSG_ALIGN(clen64));
		wp = (((char *)kcmsg32) + CMSG32_ALIGN(clen32));
	}

	/* Copy back fixed up data, and adjust pointers. */
	bufsz = (wp - workbuf);
	copy_to_user((void *)orig_cmsg_uptr, workbuf, bufsz);

	kmsg->msg_control = (struct cmsghdr *)
		(((char *)orig_cmsg_uptr) + bufsz);
	kmsg->msg_controllen = space_avail - bufsz;

	kfree(workbuf);
	return;

fail:
	/* If we leave the 64-bit format CMSG chunks in there,
	 * the application could get confused and crash.  So to
	 * ensure greater recovery, we report no CMSGs.
	 */
	kmsg->msg_controllen += bufsz;
	kmsg->msg_control = (void *) orig_cmsg_uptr;
}

asmlinkage int sys32_sendmsg(int fd, struct msghdr32 *user_msg, unsigned user_flags)
{
	struct socket *sock;
	char address[MAX_SOCK_ADDR];
	struct iovec iov[UIO_FASTIOV];
	unsigned char ctl[sizeof(struct cmsghdr) + 20];
	unsigned char *ctl_buf = ctl;
	struct msghdr kern_msg;
	int err, total_len;

	if(msghdr_from_user32_to_kern(&kern_msg, user_msg))
		return -EFAULT;
	if(kern_msg.msg_iovlen > UIO_MAXIOV)
		return -EINVAL;
	err = verify_iovec32(&kern_msg, iov, address, VERIFY_READ);
	if (err < 0)
		goto out;
	total_len = err;

	if(kern_msg.msg_controllen) {
		err = cmsghdr_from_user32_to_kern(&kern_msg, ctl, sizeof(ctl));
		if(err)
			goto out_freeiov;
		ctl_buf = kern_msg.msg_control;
	}
	kern_msg.msg_flags = user_flags;

	sock = sockfd_lookup(fd, &err);
	if (sock != NULL) {
		if (sock->file->f_flags & O_NONBLOCK)
			kern_msg.msg_flags |= MSG_DONTWAIT;
		err = sock_sendmsg(sock, &kern_msg, total_len);
		sockfd_put(sock);
	}

	/* N.B. Use kfree here, as kern_msg.msg_controllen might change? */
	if(ctl_buf != ctl)
		kfree(ctl_buf);
out_freeiov:
	if(kern_msg.msg_iov != iov)
		kfree(kern_msg.msg_iov);
out:
	return err;
}

asmlinkage int