[linux-2.6-block.git] / arch / parisc / kernel / sys_parisc32.c

/*
 * sys_parisc32.c: Conversion between 32bit and 64bit native syscalls.
 *
 * Copyright (C) 2000-2001 Hewlett Packard Company
 * Copyright (C) 2000 John Marvin
 * Copyright (C) 2001 Matthew Wilcox
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * environment. Based heavily on sys_ia32.c and sys_sparc32.c.
 */

#include <linux/compat.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/resource.h>
#include <linux/times.h>
#include <linux/utsname.h>
#include <linux/time.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/slab.h>
#include <linux/uio.h>
#include <linux/nfs_fs.h>
#include <linux/ncp_fs.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/highmem.h>
#include <linux/highuid.h>
#include <linux/mman.h>
#include <linux/binfmts.h>
#include <linux/namei.h>
#include <linux/vfs.h>
#include <linux/ptrace.h>
#include <linux/swap.h>
#include <linux/syscalls.h>

#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
#include <asm/mmu_context.h>

#include "sys32.h"

#undef DEBUG

#ifdef DEBUG
#define DBG(x)	printk x
#else
#define DBG(x)
#endif

/*
 * sys32_execve() executes a new program.
 */

asmlinkage int sys32_execve(struct pt_regs *regs)
{
	int error;
	char *filename;

	DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
	filename = getname((const char __user *) regs->gr[26]);
	error = PTR_ERR(filename);
	if (IS_ERR(filename))
		goto out;
	error = compat_do_execve(filename, compat_ptr(regs->gr[25]),
				 compat_ptr(regs->gr[24]), regs);
	if (error == 0) {
		task_lock(current);
		current->ptrace &= ~PT_DTRACE;
		task_unlock(current);
	}
	putname(filename);
out:

	return error;
}

asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
	int r22, int r21, int r20)
{
    printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n", 
    	current->comm, current->pid, r20);
    return -ENOSYS;
}

#ifdef CONFIG_SYSCTL

struct __sysctl_args32 {
	u32 name;
	int nlen;
	u32 oldval;
	u32 oldlenp;
	u32 newval;
	u32 newlen;
	u32 __unused[4];
};

asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
{
	struct __sysctl_args32 tmp;
	int error;
	unsigned int oldlen32;
	size_t oldlen, *oldlenp = NULL;
	unsigned long addr = (((long __force)&args->__unused[0]) + 7) & ~7;
	extern int do_sysctl(int *name, int nlen, void *oldval, size_t *oldlenp,
	       void *newval, size_t newlen);

	DBG(("sysctl32(%p)\n", args));

	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.  */
		/* a possibly better hack than this, which will avoid the
		 * problem if the struct is read only, is to push the
		 * 'oldlen' value out to the user's stack instead. -PB
		 */
		if (get_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
			return -EFAULT;
		oldlen = oldlen32;
		if (put_user(oldlen, (size_t *)addr))
			return -EFAULT;
		oldlenp = (size_t *)addr;
	}

	lock_kernel();
	error = do_sysctl((int *)(u64)tmp.name, tmp.nlen, (void *)(u64)tmp.oldval,
			  oldlenp, (void *)(u64)tmp.newval, tmp.newlen);
	unlock_kernel();
	if (oldlenp) {
		if (!error) {
			if (get_user(oldlen, (size_t *)addr)) {
				error = -EFAULT;
			} else {
				oldlen32 = oldlen;
				if (put_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
					error = -EFAULT;
			}
		}
		if (copy_to_user(&args->__unused[0], tmp.__unused, sizeof(tmp.__unused)))
			error = -EFAULT;
	}
	return error;
}

#endif /* CONFIG_SYSCTL */

asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
	struct compat_timespec __user *interval)
{
	struct timespec t;
	int ret;

	KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
	if (put_compat_timespec(&t, interval))
		return -EFAULT;
	return ret;
}

static int
put_compat_timeval(struct compat_timeval __user *u, struct timeval *t)
{
	struct compat_timeval t32;
	t32.tv_sec = t->tv_sec;
	t32.tv_usec = t->tv_usec;
	return copy_to_user(u, &t32, sizeof t32);
}

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

	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_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
{
    extern void do_gettimeofday(struct timeval *tv);

    if (tv) {
	    struct timeval ktv;
	    do_gettimeofday(&ktv);
	    if (put_compat_timeval(tv, &ktv))
		    return -EFAULT;
    }
    if (tz) {
	    extern struct timezone sys_tz;
	    if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
		    return -EFAULT;
    }
    return 0;
}

asmlinkage 
int sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *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);
}

int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
{
	compat_ino_t ino;
	int err;

	if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
	    !new_valid_dev(stat->rdev))
		return -EOVERFLOW;

	ino = stat->ino;
	if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
		return -EOVERFLOW;

	err  = put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
	err |= put_user(ino, &statbuf->st_ino);
	err |= put_user(stat->mode, &statbuf->st_mode);
	err |= put_user(stat->nlink, &statbuf->st_nlink);
	err |= put_user(0, &statbuf->st_reserved1);
	err |= put_user(0, &statbuf->st_reserved2);
	err |= put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
	err |= put_user(stat->size, &statbuf->st_size);
	err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
	err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
	err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
	err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
	err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
	err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
	err |= put_user(stat->blksize, &statbuf->st_blksize);
	err |= put_user(stat->blocks, &statbuf->st_blocks);
	err |= put_user(0, &statbuf->__unused1);
	err |= put_user(0, &statbuf->__unused2);
	err |= put_user(0, &statbuf->__unused3);
	err |= put_user(0, &statbuf->__unused4);
	err |= put_user(0, &statbuf->__unused5);
	err |= put_user(0, &statbuf->st_fstype); /* not avail */
	err |= put_user(0, &statbuf->st_realdev); /* not avail */
	err |= put_user(0, &statbuf->st_basemode); /* not avail */
	err |= put_user(0, &statbuf->st_spareshort);
	err |= put_user(stat->uid, &statbuf->st_uid);
	err |= put_user(stat->gid, &statbuf->st_gid);
	err |= put_user(0, &statbuf->st_spare4[0]);
	err |= put_user(0, &statbuf->st_spare4[1]);
	err |= put_user(0, &statbuf->st_spare4[2]);

	return err;
}

struct linux32_dirent {
	u32		d_ino;
	compat_off_t	d_off;
	u16		d_reclen;
	char		d_name[1];
};

struct old_linux32_dirent {
	u32	d_ino;
	u32	d_offset;
	u16	d_namlen;
	char	d_name[1];
};

struct getdents32_callback {
	struct linux32_dirent __user * current_dir;
	struct linux32_dirent __user * previous;
	int count;
	int error;
};

struct readdir32_callback {
	struct old_linux32_dirent __user * dirent;
	int count;
};

#define ROUND_UP(x,a)	((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1)))
#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
static int
filldir32 (void *__buf, const char *name, int namlen, loff_t offset, ino_t ino,
	   unsigned int d_type)
{
	struct linux32_dirent __user * dirent;
	struct getdents32_callback * buf = (struct getdents32_callback *) __buf;
	int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1, 4);
	u32 d_ino;

	buf->error = -EINVAL;	/* only used if we fail.. */
	if (reclen > buf->count)
		return -EINVAL;
	d_ino = ino;
	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
		return -EOVERFLOW;
	dirent = buf->previous;
	if (dirent)
		put_user(offset, &dirent->d_off);
	dirent = buf->current_dir;
	buf->previous = dirent;
	put_user(d_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);
	dirent = ((void __user *)dirent) + reclen;
	buf->current_dir = dirent;
	buf->count -= reclen;
	return 0;
}

asmlinkage long
sys32_getdents (unsigned int fd, void __user * dirent, unsigned int count)
{
	struct file * file;
	struct linux32_dirent __user * lastdirent;
	struct getdents32_callback buf;
	int error;

	error = -EBADF;
	file = fget(fd);
	if (!file)
		goto out;

	buf.current_dir = (struct linux32_dirent __user *) dirent;
	buf.previous = NULL;
	buf.count = count;
	buf.error = 0;

	error = vfs_readdir(file, filldir32, &buf);
	if (error < 0)
		goto out_putf;
	error = buf.error;
	lastdirent = buf.previous;
	if (lastdirent) {
		put_user(file->f_pos, &lastdirent->d_off);
		error = count - buf.count;
	}

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

static int
fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, ino_t ino,
	      unsigned int d_type)
{
	struct readdir32_callback * buf = (struct readdir32_callback *) __buf;
	struct old_linux32_dirent __user * dirent;
	u32 d_ino;

	if (buf->count)
		return -EINVAL;
	d_ino = ino;
	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
		return -EOVERFLOW;
	buf->count++;
	dirent = buf->dirent;
	put_user(d_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 long
sys32_readdir (unsigned int fd, void __user * dirent, unsigned int count)
{
	int error;
	struct file * file;
	struct readdir32_callback buf;

	error = -EBADF;
	file = fget(fd);
	if (!file)
		goto out;

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

	error = vfs_readdir(file, fillonedir32, &buf);
	if (error >= 0)
		error = buf.count;
	fput(file);
out:
	return error;
}

/*** copied from mips64 ***/
/*
 * 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, u32 *ufdset, unsigned long *fdset)
{
	n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));
	if (ufdset) {
		unsigned long odd;

		if (!access_ok(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;
	n = (n + 8*sizeof(u32) - 1) / (8*sizeof(u32));

	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);
}

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

asmlinkage long sys32_msgsnd(int msqid,
				struct msgbuf32 __user *umsgp32,
				size_t msgsz, int msgflg)
{
	struct msgbuf *mb;
	struct msgbuf32 mb32;
	int err;

	if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
		return -ENOMEM;

	err = get_user(mb32.mtype, &umsgp32->mtype);
	mb->mtype = mb32.mtype;
	err |= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);

	if (err)
		err = -EFAULT;
	else
		KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);

	kfree(mb);
	return err;
}

asmlinkage long sys32_msgrcv(int msqid,
				struct msgbuf32 __user *umsgp32,
				size_t msgsz, long msgtyp, int msgflg)
{
	struct msgbuf *mb;
	struct msgbuf32 mb32;
	int err, len;

	if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
		return -ENOMEM;

	KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);

	if (err >= 0) {
		len = err;
		mb32.mtype = mb->mtype;
		err = put_user(mb32.mtype, &umsgp32->mtype);
		err |= copy_to_user(&umsgp32->mtext, mb->mtext, len);
		if (err)
			err = -EFAULT;
		else
			err = len;
	}

	kfree(mb);
	return err;
}

asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *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 ? (off_t __user *)&of : NULL, count);
        set_fs(old_fs);

        if (offset && put_user(of, offset))
                return -EFAULT;

        return ret;
}

asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
{
	mm_segment_t old_fs = get_fs();
	int ret;
	loff_t lof;
	
	if (offset && get_user(lof, offset))
		return -EFAULT;
		
	set_fs(KERNEL_DS);
	ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
	set_fs(old_fs);
	
	if (offset && put_user(lof, offset))
		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;
	u32 totalhigh;
	u32 freehigh;
	u32 mem_unit;
	char _f[12];
};

/* We used to call sys_sysinfo and translate the result.  But sys_sysinfo
 * undoes the good work done elsewhere, and rather than undoing the
 * damage, I decided to just duplicate the code from sys_sysinfo here.
 */

asmlinkage int sys32_sysinfo(struct sysinfo32 __user *info)
{
	struct sysinfo val;
	int err;
	unsigned long seq;

	/* We don't need a memset here because we copy the
	 * struct to userspace once element at a time.
	 */

	do {
		seq = read_seqbegin(&xtime_lock);
		val.uptime = jiffies / HZ;

		val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
		val.loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT);
		val.loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT);

		val.procs = nr_threads;
	} while (read_seqretry(&xtime_lock, seq));


	si_meminfo(&val);
	si_swapinfo(&val);
	
	err = put_user (val.uptime, &info->uptime);
	err |= __put_user (val.loads[0], &info->loads[0]);
	err |= __put_user (val.loads[1], &info->loads[1]);
	err |= __put_user (val.loads[2], &info->loads[2]);
	err |= __put_user (val.totalram, &info->totalram);
	err |= __put_user (val.freeram, &info->freeram);
	err |= __put_user (val.sharedram, &info->sharedram);
	err |= __put_user (val.bufferram, &info->bufferram);
	err |= __put_user (val.totalswap, &info->totalswap);
	err |= __put_user (val.freeswap, &info->freeswap);
	err |= __put_user (val.procs, &info->procs);
	err |= __put_user (val.totalhigh, &info->totalhigh);
	err |= __put_user (val.freehigh, &info->freehigh);
	err |= __put_user (val.mem_unit, &info->mem_unit);
	return err ? -EFAULT : 0;
}


/* lseek() needs a wrapper because 'offset' can be negative, but the top
 * half of the argument has been zeroed by syscall.S.
 */

asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
{
	return sys_lseek(fd, offset, origin);
}

asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
{
        union semun u;
	
        if (cmd == SETVAL) {
                /* Ugh.  arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
                 * The int should be in the first 4, but our argument
                 * frobbing has left it in the last 4.
                 */
                u.val = *((int *)&arg + 1);
                return sys_semctl (semid, semnum, cmd, u);
	}
	return sys_semctl (semid, semnum, cmd, arg);
}

long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
			  size_t len)
{
	return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
				  buf, len);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* sys_parisc32.c: Conversion between 32bit and 64bit native syscalls.
	3	*
	4	* Copyright (C) 2000-2001 Hewlett Packard Company
	5	* Copyright (C) 2000 John Marvin
	6	* Copyright (C) 2001 Matthew Wilcox
	7	*
	8	* These routines maintain argument size conversion between 32bit and 64bit
	9	* environment. Based heavily on sys_ia32.c and sys_sparc32.c.
	10	*/
	11
1da177e4 LT	12	#include <linux/compat.h>
	13	#include <linux/kernel.h>
	14	#include <linux/sched.h>
	15	#include <linux/fs.h>
	16	#include <linux/mm.h>
	17	#include <linux/file.h>
	18	#include <linux/signal.h>
	19	#include <linux/resource.h>
	20	#include <linux/times.h>
	21	#include <linux/utsname.h>
	22	#include <linux/time.h>
1da177e4 LT	23	#include <linux/smp.h>
	24	#include <linux/smp_lock.h>
	25	#include <linux/sem.h>
	26	#include <linux/msg.h>
	27	#include <linux/shm.h>
	28	#include <linux/slab.h>
	29	#include <linux/uio.h>
	30	#include <linux/nfs_fs.h>
	31	#include <linux/ncp_fs.h>
	32	#include <linux/sunrpc/svc.h>
	33	#include <linux/nfsd/nfsd.h>
	34	#include <linux/nfsd/cache.h>
	35	#include <linux/nfsd/xdr.h>
	36	#include <linux/nfsd/syscall.h>
	37	#include <linux/poll.h>
	38	#include <linux/personality.h>
	39	#include <linux/stat.h>
	40	#include <linux/highmem.h>
	41	#include <linux/highuid.h>
	42	#include <linux/mman.h>
	43	#include <linux/binfmts.h>
	44	#include <linux/namei.h>
	45	#include <linux/vfs.h>
	46	#include <linux/ptrace.h>
	47	#include <linux/swap.h>
	48	#include <linux/syscalls.h>
	49
	50	#include <asm/types.h>
	51	#include <asm/uaccess.h>
	52	#include <asm/semaphore.h>
	53	#include <asm/mmu_context.h>
	54
	55	#include "sys32.h"
	56
	57	#undef DEBUG
	58
	59	#ifdef DEBUG
	60	#define DBG(x) printk x
	61	#else
	62	#define DBG(x)
	63	#endif
	64
	65	/*
	66	* sys32_execve() executes a new program.
	67	*/
	68
	69	asmlinkage int sys32_execve(struct pt_regs *regs)
	70	{
	71	int error;
	72	char *filename;
	73
	74	DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
	75	filename = getname((const char __user *) regs->gr[26]);
	76	error = PTR_ERR(filename);
	77	if (IS_ERR(filename))
	78	goto out;
	79	error = compat_do_execve(filename, compat_ptr(regs->gr[25]),
	80	compat_ptr(regs->gr[24]), regs);
	81	if (error == 0) {
	82	task_lock(current);
	83	current->ptrace &= ~PT_DTRACE;
	84	task_unlock(current);
	85	}
	86	putname(filename);
87	out:
88
89	return error;
90	}
91
92	asmlinkage long sys32_unimplemented(int r26, int r25, int r24, int r23,
93	int r22, int r21, int r20)
94	{
95	printk(KERN_ERR "%s(%d): Unimplemented 32 on 64 syscall #%d!\n",
96	current->comm, current->pid, r20);
97	return -ENOSYS;
98	}
99
100	#ifdef CONFIG_SYSCTL
101
102	struct __sysctl_args32 {
103	u32 name;
104	int nlen;
105	u32 oldval;
106	u32 oldlenp;
107	u32 newval;
108	u32 newlen;
109	u32 __unused[4];
110	};
111
112	asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
113	{
114	struct __sysctl_args32 tmp;
115	int error;
116	unsigned int oldlen32;
117	size_t oldlen, *oldlenp = NULL;
118	unsigned long addr = (((long __force)&args->__unused[0]) + 7) & ~7;
119	extern int do_sysctl(int name, int nlen, void oldval, size_t *oldlenp,
120	void *newval, size_t newlen);
121
122	DBG(("sysctl32(%p)\n", args));
123
124	if (copy_from_user(&tmp, args, sizeof(tmp)))
125	return -EFAULT;
126
127	if (tmp.oldval && tmp.oldlenp) {
128	/* Duh, this is ugly and might not work if sysctl_args
129	is in read-only memory, but do_sysctl does indirectly
130	a lot of uaccess in both directions and we'd have to
131	basically copy the whole sysctl.c here, and
132	glibc's __sysctl uses rw memory for the structure
133	anyway. */
134	/* a possibly better hack than this, which will avoid the
135	* problem if the struct is read only, is to push the
136	* 'oldlen' value out to the user's stack instead. -PB
137	*/
138	if (get_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
139	return -EFAULT;
140	oldlen = oldlen32;
141	if (put_user(oldlen, (size_t *)addr))
142	return -EFAULT;
143	oldlenp = (size_t *)addr;
144	}
145
146	lock_kernel();
147	error = do_sysctl((int )(u64)tmp.name, tmp.nlen, (void )(u64)tmp.oldval,
148	oldlenp, (void *)(u64)tmp.newval, tmp.newlen);
149	unlock_kernel();
150	if (oldlenp) {
151	if (!error) {
152	if (get_user(oldlen, (size_t *)addr)) {
153	error = -EFAULT;
154	} else {
155	oldlen32 = oldlen;
156	if (put_user(oldlen32, (u32 *)(u64)tmp.oldlenp))
157	error = -EFAULT;
158	}
159	}
160	if (copy_to_user(&args->__unused[0], tmp.__unused, sizeof(tmp.__unused)))
161	error = -EFAULT;
162	}
163	return error;
164	}
165
166	#endif /* CONFIG_SYSCTL */
167
168	asmlinkage long sys32_sched_rr_get_interval(pid_t pid,
169	struct compat_timespec __user *interval)
170	{
171	struct timespec t;
172	int ret;
173
174	KERNEL_SYSCALL(ret, sys_sched_rr_get_interval, pid, (struct timespec __user *)&t);
175	if (put_compat_timespec(&t, interval))
176	return -EFAULT;
177	return ret;
178	}
179
180	static int
181	put_compat_timeval(struct compat_timeval __user u, struct timeval t)
182	{
183	struct compat_timeval t32;
184	t32.tv_sec = t->tv_sec;
185	t32.tv_usec = t->tv_usec;
186	return copy_to_user(u, &t32, sizeof t32);
187	}
188
189	static inline long get_ts32(struct timespec o, struct compat_timeval __user i)
190	{
191	long usec;
192
193	if (__get_user(o->tv_sec, &i->tv_sec))
194	return -EFAULT;
195	if (__get_user(usec, &i->tv_usec))
196	return -EFAULT;
197	o->tv_nsec = usec * 1000;
198	return 0;
199	}
200
201	asmlinkage int
202	sys32_gettimeofday(struct compat_timeval __user tv, struct timezone __user tz)
203	{
204	extern void do_gettimeofday(struct timeval *tv);
205
206	if (tv) {
207	struct timeval ktv;
208	do_gettimeofday(&ktv);
209	if (put_compat_timeval(tv, &ktv))
210	return -EFAULT;
211	}
212	if (tz) {
213	extern struct timezone sys_tz;
214	if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
215	return -EFAULT;
216	}
217	return 0;
218	}
219
220	asmlinkage
221	int sys32_settimeofday(struct compat_timeval __user tv, struct timezone __user tz)
222	{
223	struct timespec kts;
224	struct timezone ktz;
225
226	if (tv) {
227	if (get_ts32(&kts, tv))
228	return -EFAULT;
229	}
230	if (tz) {
231	if (copy_from_user(&ktz, tz, sizeof(ktz)))
232	return -EFAULT;
233	}
234
235	return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
236	}
237
238	int cp_compat_stat(struct kstat stat, struct compat_stat __user statbuf)
239	{
afefdbb2	240	compat_ino_t ino;
1da177e4 LT	241	int err;
	242
	243	if (stat->size > MAX_NON_LFS \|\| !new_valid_dev(stat->dev) \|\|
	244	!new_valid_dev(stat->rdev))
	245	return -EOVERFLOW;
	246
afefdbb2 DH	247	ino = stat->ino;
	248	if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
	249	return -EOVERFLOW;
	250
1da177e4	251	err = put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
afefdbb2	252	err \|= put_user(ino, &statbuf->st_ino);
1da177e4 LT	253	err \|= put_user(stat->mode, &statbuf->st_mode);
	254	err \|= put_user(stat->nlink, &statbuf->st_nlink);
	255	err \|= put_user(0, &statbuf->st_reserved1);
	256	err \|= put_user(0, &statbuf->st_reserved2);
	257	err \|= put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
	258	err \|= put_user(stat->size, &statbuf->st_size);
	259	err \|= put_user(stat->atime.tv_sec, &statbuf->st_atime);
	260	err \|= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
	261	err \|= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
	262	err \|= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
	263	err \|= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
	264	err \|= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
	265	err \|= put_user(stat->blksize, &statbuf->st_blksize);
	266	err \|= put_user(stat->blocks, &statbuf->st_blocks);
	267	err \|= put_user(0, &statbuf->__unused1);
	268	err \|= put_user(0, &statbuf->__unused2);
	269	err \|= put_user(0, &statbuf->__unused3);
	270	err \|= put_user(0, &statbuf->__unused4);
	271	err \|= put_user(0, &statbuf->__unused5);
	272	err \|= put_user(0, &statbuf->st_fstype); /* not avail */
	273	err \|= put_user(0, &statbuf->st_realdev); /* not avail */
	274	err \|= put_user(0, &statbuf->st_basemode); /* not avail */
	275	err \|= put_user(0, &statbuf->st_spareshort);
	276	err \|= put_user(stat->uid, &statbuf->st_uid);
	277	err \|= put_user(stat->gid, &statbuf->st_gid);
	278	err \|= put_user(0, &statbuf->st_spare4[0]);
	279	err \|= put_user(0, &statbuf->st_spare4[1]);
	280	err \|= put_user(0, &statbuf->st_spare4[2]);
	281
	282	return err;
	283	}
	284
	285	struct linux32_dirent {
	286	u32 d_ino;
	287	compat_off_t d_off;
	288	u16 d_reclen;
	289	char d_name[1];
	290	};
	291
	292	struct old_linux32_dirent {
	293	u32 d_ino;
	294	u32 d_offset;
	295	u16 d_namlen;
	296	char d_name[1];
	297	};
	298
	299	struct getdents32_callback {
	300	struct linux32_dirent __user * current_dir;
	301	struct linux32_dirent __user * previous;
	302	int count;
	303	int error;
	304	};
	305
	306	struct readdir32_callback {
	307	struct old_linux32_dirent __user * dirent;
	308	int count;
	309	};
	310
	311	#define ROUND_UP(x,a) ((__typeof__(x))(((unsigned long)(x) + ((a) - 1)) & ~((a) - 1)))
	312	#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
	313	static int
	314	filldir32 (void __buf, const char name, int namlen, loff_t offset, ino_t ino,
	315	unsigned int d_type)
	316	{
317	struct linux32_dirent __user * dirent;
318	struct getdents32_callback * buf = (struct getdents32_callback *) __buf;
319	int reclen = ROUND_UP(NAME_OFFSET(dirent) + namlen + 1, 4);
afefdbb2	320	u32 d_ino;
1da177e4 LT	321
	322	buf->error = -EINVAL; /* only used if we fail.. */
	323	if (reclen > buf->count)
	324	return -EINVAL;
afefdbb2 DH	325	d_ino = ino;
	326	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
	327	return -EOVERFLOW;
1da177e4 LT	328	dirent = buf->previous;
	329	if (dirent)
	330	put_user(offset, &dirent->d_off);
	331	dirent = buf->current_dir;
	332	buf->previous = dirent;
afefdbb2	333	put_user(d_ino, &dirent->d_ino);
1da177e4 LT	334	put_user(reclen, &dirent->d_reclen);
	335	copy_to_user(dirent->d_name, name, namlen);
	336	put_user(0, dirent->d_name + namlen);
	337	dirent = ((void __user *)dirent) + reclen;
	338	buf->current_dir = dirent;
	339	buf->count -= reclen;
	340	return 0;
	341	}
	342
	343	asmlinkage long
	344	sys32_getdents (unsigned int fd, void __user * dirent, unsigned int count)
	345	{
	346	struct file * file;
	347	struct linux32_dirent __user * lastdirent;
	348	struct getdents32_callback buf;
	349	int error;
	350
	351	error = -EBADF;
	352	file = fget(fd);
	353	if (!file)
	354	goto out;
	355
	356	buf.current_dir = (struct linux32_dirent __user *) dirent;
	357	buf.previous = NULL;
	358	buf.count = count;
	359	buf.error = 0;
	360
	361	error = vfs_readdir(file, filldir32, &buf);
	362	if (error < 0)
	363	goto out_putf;
	364	error = buf.error;
	365	lastdirent = buf.previous;
	366	if (lastdirent) {
	367	put_user(file->f_pos, &lastdirent->d_off);
	368	error = count - buf.count;
	369	}
	370
	371	out_putf:
	372	fput(file);
	373	out:
	374	return error;
	375	}
	376
	377	static int
	378	fillonedir32 (void * __buf, const char * name, int namlen, loff_t offset, ino_t ino,
	379	unsigned int d_type)
	380	{
	381	struct readdir32_callback * buf = (struct readdir32_callback *) __buf;
	382	struct old_linux32_dirent __user * dirent;
afefdbb2	383	u32 d_ino;
1da177e4 LT	384
	385	if (buf->count)
	386	return -EINVAL;
afefdbb2 DH	387	d_ino = ino;
	388	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
	389	return -EOVERFLOW;
1da177e4 LT	390	buf->count++;
1da177e4 LT	391	dirent = buf->dirent;
afefdbb2	392	put_user(d_ino, &dirent->d_ino);
1da177e4 LT	393	put_user(offset, &dirent->d_offset);
	394	put_user(namlen, &dirent->d_namlen);
	395	copy_to_user(dirent->d_name, name, namlen);
	396	put_user(0, dirent->d_name + namlen);
	397	return 0;
	398	}
	399
	400	asmlinkage long
	401	sys32_readdir (unsigned int fd, void __user * dirent, unsigned int count)
	402	{
	403	int error;
	404	struct file * file;
	405	struct readdir32_callback buf;
	406
	407	error = -EBADF;
	408	file = fget(fd);
	409	if (!file)
	410	goto out;
	411
	412	buf.count = 0;
	413	buf.dirent = dirent;
	414
	415	error = vfs_readdir(file, fillonedir32, &buf);
	416	if (error >= 0)
	417	error = buf.count;
	418	fput(file);
	419	out:
	420	return error;
	421	}
	422
	423	/* copied from mips64 */
	424	/*
	425	* Ooo, nasty. We need here to frob 32-bit unsigned longs to
	426	* 64-bit unsigned longs.
	427	*/
	428
	429	static inline int
	430	get_fd_set32(unsigned long n, u32 ufdset, unsigned long fdset)
	431	{
	432	n = (n + 8sizeof(u32) - 1) / (8sizeof(u32));
	433	if (ufdset) {
	434	unsigned long odd;
	435
	436	if (!access_ok(VERIFY_WRITE, ufdset, n*sizeof(u32)))
	437	return -EFAULT;
	438
	439	odd = n & 1UL;
	440	n &= ~1UL;
	441	while (n) {
	442	unsigned long h, l;
	443	__get_user(l, ufdset);
	444	__get_user(h, ufdset+1);
	445	ufdset += 2;
	446	*fdset++ = h << 32 \| l;
	447	n -= 2;
	448	}
	449	if (odd)
	450	__get_user(*fdset, ufdset);
	451	} else {
	452	/* Tricky, must clear full unsigned long in the
	453	* kernel fdset at the end, this makes sure that
	454	* actually happens.
	455	*/
	456	memset(fdset, 0, ((n + 1) & ~1)*sizeof(u32));
457	}
458	return 0;
459	}
460
461	static inline void
462	set_fd_set32(unsigned long n, u32 ufdset, unsigned long fdset)
463	{
464	unsigned long odd;
465	n = (n + 8sizeof(u32) - 1) / (8sizeof(u32));
466
467	if (!ufdset)
468	return;
469
470	odd = n & 1UL;
471	n &= ~1UL;
472	while (n) {
473	unsigned long h, l;
474	l = *fdset++;
475	h = l >> 32;
476	__put_user(l, ufdset);
477	__put_user(h, ufdset+1);
478	ufdset += 2;
479	n -= 2;
480	}
481	if (odd)
482	__put_user(*fdset, ufdset);
483	}
484
485	struct msgbuf32 {
486	int mtype;
487	char mtext[1];
488	};
489
490	asmlinkage long sys32_msgsnd(int msqid,
491	struct msgbuf32 __user *umsgp32,
492	size_t msgsz, int msgflg)
493	{
494	struct msgbuf *mb;
495	struct msgbuf32 mb32;
496	int err;
497
498	if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
499	return -ENOMEM;
500
501	err = get_user(mb32.mtype, &umsgp32->mtype);
502	mb->mtype = mb32.mtype;
503	err \|= copy_from_user(mb->mtext, &umsgp32->mtext, msgsz);
504
505	if (err)
506	err = -EFAULT;
507	else
508	KERNEL_SYSCALL(err, sys_msgsnd, msqid, (struct msgbuf __user *)mb, msgsz, msgflg);
509
510	kfree(mb);
511	return err;
512	}
513
514	asmlinkage long sys32_msgrcv(int msqid,
515	struct msgbuf32 __user *umsgp32,
516	size_t msgsz, long msgtyp, int msgflg)
517	{
518	struct msgbuf *mb;
519	struct msgbuf32 mb32;
520	int err, len;
521
522	if ((mb = kmalloc(msgsz + sizeof *mb + 4, GFP_KERNEL)) == NULL)
523	return -ENOMEM;
524
525	KERNEL_SYSCALL(err, sys_msgrcv, msqid, (struct msgbuf __user *)mb, msgsz, msgtyp, msgflg);
526
527	if (err >= 0) {
528	len = err;
529	mb32.mtype = mb->mtype;
530	err = put_user(mb32.mtype, &umsgp32->mtype);
531	err \|= copy_to_user(&umsgp32->mtext, mb->mtext, len);
532	if (err)
533	err = -EFAULT;
534	else
535	err = len;
536	}
537
538	kfree(mb);
539	return err;
540	}
541
542	asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset, s32 count)
543	{
544	mm_segment_t old_fs = get_fs();
545	int ret;
546	off_t of;
547
548	if (offset && get_user(of, offset))
549	return -EFAULT;
550
551	set_fs(KERNEL_DS);
552	ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
553	set_fs(old_fs);
554
555	if (offset && put_user(of, offset))
556	return -EFAULT;
557
558	return ret;
559	}
560
561	asmlinkage int sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
562	{
563	mm_segment_t old_fs = get_fs();
564	int ret;
565	loff_t lof;
566
567	if (offset && get_user(lof, offset))
568	return -EFAULT;
569
570	set_fs(KERNEL_DS);
571	ret = sys_sendfile64(out_fd, in_fd, offset ? (loff_t __user *)&lof : NULL, count);
572	set_fs(old_fs);
573
574	if (offset && put_user(lof, offset))
575	return -EFAULT;
576
577	return ret;
578	}
579
580
1da177e4 LT	581	struct sysinfo32 {
	582	s32 uptime;
	583	u32 loads[3];
	584	u32 totalram;
	585	u32 freeram;
	586	u32 sharedram;
	587	u32 bufferram;
	588	u32 totalswap;
	589	u32 freeswap;
	590	unsigned short procs;
	591	u32 totalhigh;
	592	u32 freehigh;
	593	u32 mem_unit;
	594	char _f[12];
	595	};
	596
	597	/* We used to call sys_sysinfo and translate the result. But sys_sysinfo
	598	* undoes the good work done elsewhere, and rather than undoing the
	599	* damage, I decided to just duplicate the code from sys_sysinfo here.
	600	*/
	601
	602	asmlinkage int sys32_sysinfo(struct sysinfo32 __user *info)
	603	{
	604	struct sysinfo val;
	605	int err;
	606	unsigned long seq;
	607
	608	/* We don't need a memset here because we copy the
	609	* struct to userspace once element at a time.
	610	*/
	611
	612	do {
	613	seq = read_seqbegin(&xtime_lock);
	614	val.uptime = jiffies / HZ;
	615
	616	val.loads[0] = avenrun[0] << (SI_LOAD_SHIFT - FSHIFT);
	617	val.loads[1] = avenrun[1] << (SI_LOAD_SHIFT - FSHIFT);
	618	val.loads[2] = avenrun[2] << (SI_LOAD_SHIFT - FSHIFT);
	619
	620	val.procs = nr_threads;
	621	} while (read_seqretry(&xtime_lock, seq));
	622
	623
	624	si_meminfo(&val);
	625	si_swapinfo(&val);
	626
	627	err = put_user (val.uptime, &info->uptime);
	628	err \|= __put_user (val.loads[0], &info->loads[0]);
	629	err \|= __put_user (val.loads[1], &info->loads[1]);
	630	err \|= __put_user (val.loads[2], &info->loads[2]);
	631	err \|= __put_user (val.totalram, &info->totalram);
	632	err \|= __put_user (val.freeram, &info->freeram);
	633	err \|= __put_user (val.sharedram, &info->sharedram);
	634	err \|= __put_user (val.bufferram, &info->bufferram);
	635	err \|= __put_user (val.totalswap, &info->totalswap);
	636	err \|= __put_user (val.freeswap, &info->freeswap);
	637	err \|= __put_user (val.procs, &info->procs);
	638	err \|= __put_user (val.totalhigh, &info->totalhigh);
	639	err \|= __put_user (val.freehigh, &info->freehigh);
	640	err \|= __put_user (val.mem_unit, &info->mem_unit);
	641	return err ? -EFAULT : 0;
	642	}
	643
	644
645	/* lseek() needs a wrapper because 'offset' can be negative, but the top
646	* half of the argument has been zeroed by syscall.S.
647	*/
648
649	asmlinkage int sys32_lseek(unsigned int fd, int offset, unsigned int origin)
650	{
651	return sys_lseek(fd, offset, origin);
652	}
653
654	asmlinkage long sys32_semctl(int semid, int semnum, int cmd, union semun arg)
655	{
656	union semun u;
657
658	if (cmd == SETVAL) {
659	/* Ugh. arg is a union of int,ptr,ptr,ptr, so is 8 bytes.
660	* The int should be in the first 4, but our argument
661	* frobbing has left it in the last 4.
662	*/
663	u.val = ((int )&arg + 1);
664	return sys_semctl (semid, semnum, cmd, u);
665	}
666	return sys_semctl (semid, semnum, cmd, arg);
667	}
668
669	long sys32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
670	size_t len)
671	{
672	return sys_lookup_dcookie((u64)cookie_high << 32 \| cookie_low,
673	buf, len);
674	}