[deliverable/linux.git] / arch / sparc / kernel / sys_sparc32.c

/* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
 *
 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * environment.
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/capability.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/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/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/syscalls.h>
#include <linux/sysctl.h>
#include <linux/binfmts.h>
#include <linux/dnotify.h>
#include <linux/security.h>
#include <linux/compat.h>
#include <linux/vfs.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/ptrace.h>

#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/fpumacro.h>
#include <asm/mmu_context.h>
#include <asm/compat_signal.h>

#ifdef CONFIG_SYSVIPC                                                        
asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
{
	int version;

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

	switch (call) {
	case SEMTIMEDOP:
		if (fifth)
			/* sign extend semid */
			return compat_sys_semtimedop((int)first,
						     compat_ptr(ptr), second,
						     compat_ptr(fifth));
		/* else fall through for normal semop() */
	case SEMOP:
		/* struct sembuf is the same on 32 and 64bit :)) */
		/* sign extend semid */
		return sys_semtimedop((int)first, compat_ptr(ptr), second,
				      NULL);
	case SEMGET:
		/* sign extend key, nsems */
		return sys_semget((int)first, (int)second, third);
	case SEMCTL:
		/* sign extend semid, semnum */
		return compat_sys_semctl((int)first, (int)second, third,
					 compat_ptr(ptr));

	case MSGSND:
		/* sign extend msqid */
		return compat_sys_msgsnd((int)first, (int)second, third,
					 compat_ptr(ptr));
	case MSGRCV:
		/* sign extend msqid, msgtyp */
		return compat_sys_msgrcv((int)first, second, (int)fifth,
					 third, version, compat_ptr(ptr));
	case MSGGET:
		/* sign extend key */
		return sys_msgget((int)first, second);
	case MSGCTL:
		/* sign extend msqid */
		return compat_sys_msgctl((int)first, second, compat_ptr(ptr));

	case SHMAT:
		/* sign extend shmid */
		return compat_sys_shmat((int)first, second, third, version,
					compat_ptr(ptr));
	case SHMDT:
		return sys_shmdt(compat_ptr(ptr));
	case SHMGET:
		/* sign extend key_t */
		return sys_shmget((int)first, second, third);
	case SHMCTL:
		/* sign extend shmid */
		return compat_sys_shmctl((int)first, second, compat_ptr(ptr));

	default:
		return -ENOSYS;
	};

	return -ENOSYS;
}
#endif

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

asmlinkage long 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);
}

static int cp_compat_stat64(struct kstat *stat,
			    struct compat_stat64 __user *statbuf)
{
	int err;

	err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
	err |= put_user(stat->ino, &statbuf->st_ino);
	err |= put_user(stat->mode, &statbuf->st_mode);
	err |= put_user(stat->nlink, &statbuf->st_nlink);
	err |= put_user(stat->uid, &statbuf->st_uid);
	err |= put_user(stat->gid, &statbuf->st_gid);
	err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
	err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
	err |= put_user(stat->size, &statbuf->st_size);
	err |= put_user(stat->blksize, &statbuf->st_blksize);
	err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
	err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
	err |= put_user(stat->blocks, &statbuf->st_blocks);
	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(0, &statbuf->__unused4);
	err |= put_user(0, &statbuf->__unused5);

	return err;
}

asmlinkage long compat_sys_stat64(char __user * filename,
		struct compat_stat64 __user *statbuf)
{
	struct kstat stat;
	int error = vfs_stat(filename, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);
	return error;
}

asmlinkage long compat_sys_lstat64(char __user * filename,
		struct compat_stat64 __user *statbuf)
{
	struct kstat stat;
	int error = vfs_lstat(filename, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);
	return error;
}

asmlinkage long compat_sys_fstat64(unsigned int fd,
		struct compat_stat64 __user * statbuf)
{
	struct kstat stat;
	int error = vfs_fstat(fd, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);
	return error;
}

asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
		struct compat_stat64 __user * statbuf, int flag)
{
	struct kstat stat;
	int error = -EINVAL;

	if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
		goto out;

	if (flag & AT_SYMLINK_NOFOLLOW)
		error = vfs_lstat_fd(dfd, filename, &stat);
	else
		error = vfs_stat_fd(dfd, filename, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);

out:
	return error;
}

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

asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
{
	struct timespec t;
	int ret;
	mm_segment_t old_fs = get_fs ();
	
	set_fs (KERNEL_DS);
	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
	set_fs (old_fs);
	if (put_compat_timespec(&t, interval))
		return -EFAULT;
	return ret;
}

asmlinkage long compat_sys_rt_sigprocmask(int how,
					  compat_sigset_t __user *set,
					  compat_sigset_t __user *oset,
					  compat_size_t sigsetsize)
{
	sigset_t s;
	compat_sigset_t s32;
	int ret;
	mm_segment_t old_fs = get_fs();
	
	if (set) {
		if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
			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 ? (sigset_t __user *) &s : NULL,
				 oset ? (sigset_t __user *) &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(compat_sigset_t)))
			return -EFAULT;
	}
	return 0;
}

asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
				    compat_size_t sigsetsize)
{
	sigset_t s;
	compat_sigset_t s32;
	int ret;
	mm_segment_t old_fs = get_fs();
		
	set_fs (KERNEL_DS);
	ret = sys_rt_sigpending((sigset_t __user *) &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(compat_sigset_t)))
			return -EFAULT;
	}
	return ret;
}

asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
					   struct compat_siginfo __user *uinfo)
{
	siginfo_t info;
	int ret;
	mm_segment_t old_fs = get_fs();
	
	if (copy_siginfo_from_user32(&info, uinfo))
		return -EFAULT;

	set_fs (KERNEL_DS);
	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
	set_fs (old_fs);
	return ret;
}

asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
				     struct old_sigaction32 __user *oact)
{
        struct k_sigaction new_ka, old_ka;
        int ret;

	WARN_ON_ONCE(sig >= 0);
	sig = -sig;

        if (act) {
		compat_old_sigset_t mask;
		u32 u_handler, u_restorer;
		
		ret = get_user(u_handler, &act->sa_handler);
		new_ka.sa.sa_handler =  compat_ptr(u_handler);
		ret |= __get_user(u_restorer, &act->sa_restorer);
		new_ka.sa.sa_restorer = compat_ptr(u_restorer);
		ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
		ret |= __get_user(mask, &act->sa_mask);
		if (ret)
			return ret;
		new_ka.ka_restorer = NULL;
		siginitset(&new_ka.sa.sa_mask, mask);
        }

        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);

	if (!ret && oact) {
		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
		ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
		ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
		ret |= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
        }

	return ret;
}

asmlinkage long compat_sys_rt_sigaction(int sig,
					struct sigaction32 __user *act,
					struct sigaction32 __user *oact,
					void __user *restorer,
					compat_size_t sigsetsize)
{
        struct k_sigaction new_ka, old_ka;
        int ret;
	compat_sigset_t set32;

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

        if (act) {
		u32 u_handler, u_restorer;

		new_ka.ka_restorer = restorer;
		ret = get_user(u_handler, &act->sa_handler);
		new_ka.sa.sa_handler =  compat_ptr(u_handler);
		ret |= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
		switch (_NSIG_WORDS) {
		case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] | (((long)set32.sig[7]) << 32);
		case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] | (((long)set32.sig[5]) << 32);
		case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] | (((long)set32.sig[3]) << 32);
		case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] | (((long)set32.sig[1]) << 32);
		}
		ret |= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
		ret |= __get_user(u_restorer, &act->sa_restorer);
		new_ka.sa.sa_restorer = compat_ptr(u_restorer);
                if (ret)
                	return -EFAULT;
	}

	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);

	if (!ret && oact) {
		switch (_NSIG_WORDS) {
		case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
		case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
		case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
		case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
		}
		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
		ret |= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
		ret |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
		ret |= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
		if (ret)
			ret = -EFAULT;
        }

        return ret;
}

/*
 * sparc32_execve() executes a new program after the asm stub has set
 * things up for us.  This should basically do what I want it to.
 */
asmlinkage long sparc32_execve(struct pt_regs *regs)
{
	int error, base = 0;
	char *filename;

	/* User register window flush is done by entry.S */

	/* Check for indirect call. */
	if ((u32)regs->u_regs[UREG_G1] == 0)
		base = 1;

	filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
	error = PTR_ERR(filename);
	if (IS_ERR(filename))
		goto out;

	error = compat_do_execve(filename,
				 compat_ptr(regs->u_regs[base + UREG_I1]),
				 compat_ptr(regs->u_regs[base + UREG_I2]), regs);

	putname(filename);

	if (!error) {
		fprs_write(0);
		current_thread_info()->xfsr[0] = 0;
		current_thread_info()->fpsaved[0] = 0;
		regs->tstate &= ~TSTATE_PEF;
	}
out:
	return error;
}

#ifdef CONFIG_MODULES

asmlinkage long sys32_init_module(void __user *umod, u32 len,
				  const char __user *uargs)
{
	return sys_init_module(umod, len, uargs);
}

asmlinkage long sys32_delete_module(const char __user *name_user,
				    unsigned int flags)
{
	return sys_delete_module(name_user, flags);
}

#else /* CONFIG_MODULES */

asmlinkage long sys32_init_module(const char __user *name_user,
				  struct module __user *mod_user)
{
	return -ENOSYS;
}

asmlinkage long sys32_delete_module(const char __user *name_user)
{
	return -ENOSYS;
}

#endif  /* CONFIG_MODULES */

asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
					char __user *ubuf,
					compat_size_t count,
					unsigned long poshi,
					unsigned long poslo)
{
	return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
}

asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
					 char __user *ubuf,
					 compat_size_t count,
					 unsigned long poshi,
					 unsigned long poslo)
{
	return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
}

asmlinkage long compat_sys_readahead(int fd,
				     unsigned long offhi,
				     unsigned long offlo,
				     compat_size_t count)
{
	return sys_readahead(fd, (offhi << 32) | offlo, count);
}

long compat_sys_fadvise64(int fd,
			  unsigned long offhi,
			  unsigned long offlo,
			  compat_size_t len, int advice)
{
	return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
}

long compat_sys_fadvise64_64(int fd,
			     unsigned long offhi, unsigned long offlo,
			     unsigned long lenhi, unsigned long lenlo,
			     int advice)
{
	return sys_fadvise64_64(fd,
				(offhi << 32) | offlo,
				(lenhi << 32) | lenlo,
				advice);
}

asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
				    compat_off_t __user *offset,
				    compat_size_t 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 long compat_sys_sendfile64(int out_fd, int in_fd,
				      compat_loff_t __user *offset,
				      compat_size_t 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;
}

/* This is just a version for 32-bit applications which does
 * not force O_LARGEFILE on.
 */

asmlinkage long sparc32_open(const char __user *filename,
			     int flags, int mode)
{
	return do_sys_open(AT_FDCWD, filename, flags, mode);
}

extern unsigned long do_mremap(unsigned long addr,
	unsigned long old_len, unsigned long new_len,
	unsigned long flags, unsigned long new_addr);
                
asmlinkage unsigned long sys32_mremap(unsigned long addr,
	unsigned long old_len, unsigned long new_len,
	unsigned long flags, u32 __new_addr)
{
	unsigned long ret = -EINVAL;
	unsigned long new_addr = __new_addr;

	if (unlikely(sparc_mmap_check(addr, old_len)))
		goto out;
	if (unlikely(sparc_mmap_check(new_addr, new_len)))
		goto out;
	down_write(&current->mm->mmap_sem);
	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
	up_write(&current->mm->mmap_sem);
out:
	return ret;       
}

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)
{
#ifndef CONFIG_SYSCTL_SYSCALL
	return -ENOSYS;
#else
	struct __sysctl_args32 tmp;
	int error;
	size_t oldlen, __user *oldlenp = NULL;
	unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;

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

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

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

long sys32_lookup_dcookie(unsigned long cookie_high,
			  unsigned long cookie_low,
			  char __user *buf, size_t len)
{
	return sys_lookup_dcookie((cookie_high << 32) | cookie_low,
				  buf, len);
}

long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags)
{
	return sys_sync_file_range(fd,
				   (off_high << 32) | off_low,
				   (nb_high << 32) | nb_low,
				   flags);
}

asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
				     u32 lenhi, u32 lenlo)
{
	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
			     ((loff_t)lenhi << 32) | lenlo);
}
Commit	Line	Data
bc5a2e64	1	/* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
1da177e4 LT	2	*
1da177e4 LT	3	* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
bc5a2e64	4	* Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
1da177e4 LT	5	*
	6	* These routines maintain argument size conversion between 32bit and 64bit
	7	* environment.
	8	*/
	9
1da177e4 LT	10	#include <linux/kernel.h>
1da177e4 LT	11	#include <linux/sched.h>
a9415644	12	#include <linux/capability.h>
1da177e4 LT	13	#include <linux/fs.h>
	14	#include <linux/mm.h>
	15	#include <linux/file.h>
	16	#include <linux/signal.h>
	17	#include <linux/resource.h>
	18	#include <linux/times.h>
	19	#include <linux/utsname.h>
1da177e4 LT	20	#include <linux/smp.h>
	21	#include <linux/smp_lock.h>
	22	#include <linux/sem.h>
	23	#include <linux/msg.h>
	24	#include <linux/shm.h>
	25	#include <linux/slab.h>
	26	#include <linux/uio.h>
	27	#include <linux/nfs_fs.h>
	28	#include <linux/quota.h>
	29	#include <linux/module.h>
	30	#include <linux/sunrpc/svc.h>
	31	#include <linux/nfsd/nfsd.h>
	32	#include <linux/nfsd/cache.h>
	33	#include <linux/nfsd/xdr.h>
	34	#include <linux/nfsd/syscall.h>
	35	#include <linux/poll.h>
	36	#include <linux/personality.h>
	37	#include <linux/stat.h>
	38	#include <linux/filter.h>
	39	#include <linux/highmem.h>
	40	#include <linux/highuid.h>
	41	#include <linux/mman.h>
	42	#include <linux/ipv6.h>
	43	#include <linux/in.h>
	44	#include <linux/icmpv6.h>
	45	#include <linux/syscalls.h>
	46	#include <linux/sysctl.h>
	47	#include <linux/binfmts.h>
	48	#include <linux/dnotify.h>
	49	#include <linux/security.h>
	50	#include <linux/compat.h>
	51	#include <linux/vfs.h>
	52	#include <linux/netfilter_ipv4/ip_tables.h>
	53	#include <linux/ptrace.h>
1da177e4 LT	54
1da177e4 LT	55	#include <asm/types.h>
1da177e4 LT	56	#include <asm/uaccess.h>
1da177e4 LT	57	#include <asm/fpumacro.h>
1da177e4	58	#include <asm/mmu_context.h>
14cc6aba	59	#include <asm/compat_signal.h>
1da177e4	60
1da177e4 LT	61	#ifdef CONFIG_SYSVIPC
	62	asmlinkage long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr, u32 fifth)
	63	{
	64	int version;
	65
	66	version = call >> 16; /* hack for backward compatibility */
	67	call &= 0xffff;
	68
	69	switch (call) {
	70	case SEMTIMEDOP:
	71	if (fifth)
	72	/* sign extend semid */
	73	return compat_sys_semtimedop((int)first,
	74	compat_ptr(ptr), second,
	75	compat_ptr(fifth));
	76	/* else fall through for normal semop() */
	77	case SEMOP:
	78	/* struct sembuf is the same on 32 and 64bit :)) */
	79	/* sign extend semid */
	80	return sys_semtimedop((int)first, compat_ptr(ptr), second,
	81	NULL);
	82	case SEMGET:
	83	/* sign extend key, nsems */
	84	return sys_semget((int)first, (int)second, third);
	85	case SEMCTL:
	86	/* sign extend semid, semnum */
	87	return compat_sys_semctl((int)first, (int)second, third,
	88	compat_ptr(ptr));
	89
	90	case MSGSND:
	91	/* sign extend msqid */
	92	return compat_sys_msgsnd((int)first, (int)second, third,
	93	compat_ptr(ptr));
	94	case MSGRCV:
	95	/* sign extend msqid, msgtyp */
	96	return compat_sys_msgrcv((int)first, second, (int)fifth,
	97	third, version, compat_ptr(ptr));
	98	case MSGGET:
	99	/* sign extend key */
	100	return sys_msgget((int)first, second);
	101	case MSGCTL:
	102	/* sign extend msqid */
	103	return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
	104
	105	case SHMAT:
	106	/* sign extend shmid */
	107	return compat_sys_shmat((int)first, second, third, version,
	108	compat_ptr(ptr));
	109	case SHMDT:
	110	return sys_shmdt(compat_ptr(ptr));
	111	case SHMGET:
	112	/* sign extend key_t */
	113	return sys_shmget((int)first, second, third);
	114	case SHMCTL:
	115	/* sign extend shmid */
	116	return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
	117
	118	default:
	119	return -ENOSYS;
	120	};
	121
	122	return -ENOSYS;
	123	}
	124	#endif
125
126	asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
127	{
128	if ((int)high < 0)
129	return -EINVAL;
130	else
131	return sys_truncate(path, (high << 32) \| low);
132	}
133
134	asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
135	{
136	if ((int)high < 0)
137	return -EINVAL;
138	else
139	return sys_ftruncate(fd, (high << 32) \| low);
140	}
141
908f5162 AB	142	static int cp_compat_stat64(struct kstat *stat,
908f5162 AB	143	struct compat_stat64 __user *statbuf)
0ba4da03 DM	144	{
	145	int err;
	146
	147	err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
	148	err \|= put_user(stat->ino, &statbuf->st_ino);
	149	err \|= put_user(stat->mode, &statbuf->st_mode);
	150	err \|= put_user(stat->nlink, &statbuf->st_nlink);
	151	err \|= put_user(stat->uid, &statbuf->st_uid);
	152	err \|= put_user(stat->gid, &statbuf->st_gid);
	153	err \|= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
	154	err \|= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
	155	err \|= put_user(stat->size, &statbuf->st_size);
	156	err \|= put_user(stat->blksize, &statbuf->st_blksize);
	157	err \|= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
	158	err \|= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
	159	err \|= put_user(stat->blocks, &statbuf->st_blocks);
	160	err \|= put_user(stat->atime.tv_sec, &statbuf->st_atime);
	161	err \|= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
	162	err \|= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
	163	err \|= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
	164	err \|= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
	165	err \|= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
	166	err \|= put_user(0, &statbuf->__unused4);
	167	err \|= put_user(0, &statbuf->__unused5);
	168
	169	return err;
	170	}
	171
	172	asmlinkage long compat_sys_stat64(char __user * filename,
	173	struct compat_stat64 __user *statbuf)
	174	{
	175	struct kstat stat;
	176	int error = vfs_stat(filename, &stat);
	177
	178	if (!error)
	179	error = cp_compat_stat64(&stat, statbuf);
	180	return error;
	181	}
	182
	183	asmlinkage long compat_sys_lstat64(char __user * filename,
	184	struct compat_stat64 __user *statbuf)
	185	{
	186	struct kstat stat;
	187	int error = vfs_lstat(filename, &stat);
	188
	189	if (!error)
	190	error = cp_compat_stat64(&stat, statbuf);
	191	return error;
	192	}
	193
	194	asmlinkage long compat_sys_fstat64(unsigned int fd,
	195	struct compat_stat64 __user * statbuf)
	196	{
	197	struct kstat stat;
	198	int error = vfs_fstat(fd, &stat);
	199
	200	if (!error)
	201	error = cp_compat_stat64(&stat, statbuf);
	202	return error;
	203	}
	204
40ad7a6a DM	205	asmlinkage long compat_sys_fstatat64(unsigned int dfd, char __user *filename,
	206	struct compat_stat64 __user * statbuf, int flag)
	207	{
	208	struct kstat stat;
	209	int error = -EINVAL;
	210
	211	if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
	212	goto out;
	213
	214	if (flag & AT_SYMLINK_NOFOLLOW)
	215	error = vfs_lstat_fd(dfd, filename, &stat);
	216	else
	217	error = vfs_stat_fd(dfd, filename, &stat);
	218
	219	if (!error)
	220	error = cp_compat_stat64(&stat, statbuf);
	221
	222	out:
	223	return error;
	224	}
	225
1da177e4 LT	226	asmlinkage long compat_sys_sysfs(int option, u32 arg1, u32 arg2)
	227	{
	228	return sys_sysfs(option, arg1, arg2);
	229	}
	230
1da177e4 LT	231	asmlinkage long compat_sys_sched_rr_get_interval(compat_pid_t pid, struct compat_timespec __user *interval)
	232	{
	233	struct timespec t;
	234	int ret;
	235	mm_segment_t old_fs = get_fs ();
	236
	237	set_fs (KERNEL_DS);
	238	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *) &t);
	239	set_fs (old_fs);
	240	if (put_compat_timespec(&t, interval))
	241	return -EFAULT;
	242	return ret;
	243	}
	244
	245	asmlinkage long compat_sys_rt_sigprocmask(int how,
	246	compat_sigset_t __user *set,
	247	compat_sigset_t __user *oset,
	248	compat_size_t sigsetsize)
	249	{
	250	sigset_t s;
	251	compat_sigset_t s32;
	252	int ret;
	253	mm_segment_t old_fs = get_fs();
	254
	255	if (set) {
	256	if (copy_from_user (&s32, set, sizeof(compat_sigset_t)))
	257	return -EFAULT;
	258	switch (_NSIG_WORDS) {
	259	case 4: s.sig[3] = s32.sig[6] \| (((long)s32.sig[7]) << 32);
	260	case 3: s.sig[2] = s32.sig[4] \| (((long)s32.sig[5]) << 32);
	261	case 2: s.sig[1] = s32.sig[2] \| (((long)s32.sig[3]) << 32);
	262	case 1: s.sig[0] = s32.sig[0] \| (((long)s32.sig[1]) << 32);
	263	}
	264	}
	265	set_fs (KERNEL_DS);
	266	ret = sys_rt_sigprocmask(how,
	267	set ? (sigset_t __user *) &s : NULL,
	268	oset ? (sigset_t __user *) &s : NULL,
	269	sigsetsize);
	270	set_fs (old_fs);
	271	if (ret) return ret;
	272	if (oset) {
	273	switch (_NSIG_WORDS) {
	274	case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
	275	case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
	276	case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
	277	case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
	278	}
	279	if (copy_to_user (oset, &s32, sizeof(compat_sigset_t)))
	280	return -EFAULT;
	281	}
	282	return 0;
	283	}
	284
	285	asmlinkage long sys32_rt_sigpending(compat_sigset_t __user *set,
	286	compat_size_t sigsetsize)
	287	{
	288	sigset_t s;
	289	compat_sigset_t s32;
	290	int ret;
	291	mm_segment_t old_fs = get_fs();
	292
	293	set_fs (KERNEL_DS);
	294	ret = sys_rt_sigpending((sigset_t __user *) &s, sigsetsize);
295	set_fs (old_fs);
296	if (!ret) {
297	switch (_NSIG_WORDS) {
298	case 4: s32.sig[7] = (s.sig[3] >> 32); s32.sig[6] = s.sig[3];
299	case 3: s32.sig[5] = (s.sig[2] >> 32); s32.sig[4] = s.sig[2];
300	case 2: s32.sig[3] = (s.sig[1] >> 32); s32.sig[2] = s.sig[1];
301	case 1: s32.sig[1] = (s.sig[0] >> 32); s32.sig[0] = s.sig[0];
302	}
303	if (copy_to_user (set, &s32, sizeof(compat_sigset_t)))
304	return -EFAULT;
305	}
306	return ret;
307	}
308
309	asmlinkage long compat_sys_rt_sigqueueinfo(int pid, int sig,
310	struct compat_siginfo __user *uinfo)
311	{
312	siginfo_t info;
313	int ret;
314	mm_segment_t old_fs = get_fs();
315
316	if (copy_siginfo_from_user32(&info, uinfo))
317	return -EFAULT;
318
319	set_fs (KERNEL_DS);
320	ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *) &info);
321	set_fs (old_fs);
322	return ret;
323	}
324
325	asmlinkage long compat_sys_sigaction(int sig, struct old_sigaction32 __user *act,
326	struct old_sigaction32 __user *oact)
327	{
328	struct k_sigaction new_ka, old_ka;
329	int ret;
330
5526b7e4 DM	331	WARN_ON_ONCE(sig >= 0);
5526b7e4 DM	332	sig = -sig;
1da177e4 LT	333
	334	if (act) {
	335	compat_old_sigset_t mask;
	336	u32 u_handler, u_restorer;
	337
	338	ret = get_user(u_handler, &act->sa_handler);
	339	new_ka.sa.sa_handler = compat_ptr(u_handler);
	340	ret \|= __get_user(u_restorer, &act->sa_restorer);
	341	new_ka.sa.sa_restorer = compat_ptr(u_restorer);
	342	ret \|= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
	343	ret \|= __get_user(mask, &act->sa_mask);
	344	if (ret)
	345	return ret;
	346	new_ka.ka_restorer = NULL;
	347	siginitset(&new_ka.sa.sa_mask, mask);
	348	}
	349
	350	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
	351
	352	if (!ret && oact) {
	353	ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
	354	ret \|= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
	355	ret \|= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
	356	ret \|= __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
	357	}
	358
	359	return ret;
	360	}
	361
	362	asmlinkage long compat_sys_rt_sigaction(int sig,
	363	struct sigaction32 __user *act,
	364	struct sigaction32 __user *oact,
	365	void __user *restorer,
	366	compat_size_t sigsetsize)
	367	{
	368	struct k_sigaction new_ka, old_ka;
	369	int ret;
	370	compat_sigset_t set32;
	371
	372	/* XXX: Don't preclude handling different sized sigset_t's. */
	373	if (sigsetsize != sizeof(compat_sigset_t))
	374	return -EINVAL;
	375
1da177e4 LT	376	if (act) {
	377	u32 u_handler, u_restorer;
	378
	379	new_ka.ka_restorer = restorer;
	380	ret = get_user(u_handler, &act->sa_handler);
	381	new_ka.sa.sa_handler = compat_ptr(u_handler);
	382	ret \|= __copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
	383	switch (_NSIG_WORDS) {
	384	case 4: new_ka.sa.sa_mask.sig[3] = set32.sig[6] \| (((long)set32.sig[7]) << 32);
	385	case 3: new_ka.sa.sa_mask.sig[2] = set32.sig[4] \| (((long)set32.sig[5]) << 32);
	386	case 2: new_ka.sa.sa_mask.sig[1] = set32.sig[2] \| (((long)set32.sig[3]) << 32);
	387	case 1: new_ka.sa.sa_mask.sig[0] = set32.sig[0] \| (((long)set32.sig[1]) << 32);
	388	}
	389	ret \|= __get_user(new_ka.sa.sa_flags, &act->sa_flags);
	390	ret \|= __get_user(u_restorer, &act->sa_restorer);
	391	new_ka.sa.sa_restorer = compat_ptr(u_restorer);
	392	if (ret)
	393	return -EFAULT;
	394	}
	395
	396	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
	397
	398	if (!ret && oact) {
	399	switch (_NSIG_WORDS) {
	400	case 4: set32.sig[7] = (old_ka.sa.sa_mask.sig[3] >> 32); set32.sig[6] = old_ka.sa.sa_mask.sig[3];
	401	case 3: set32.sig[5] = (old_ka.sa.sa_mask.sig[2] >> 32); set32.sig[4] = old_ka.sa.sa_mask.sig[2];
	402	case 2: set32.sig[3] = (old_ka.sa.sa_mask.sig[1] >> 32); set32.sig[2] = old_ka.sa.sa_mask.sig[1];
	403	case 1: set32.sig[1] = (old_ka.sa.sa_mask.sig[0] >> 32); set32.sig[0] = old_ka.sa.sa_mask.sig[0];
	404	}
	405	ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
	406	ret \|= __copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
	407	ret \|= __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
	408	ret \|= __put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
	409	if (ret)
	410	ret = -EFAULT;
	411	}
	412
	413	return ret;
	414	}
	415
	416	/*
	417	* sparc32_execve() executes a new program after the asm stub has set
	418	* things up for us. This should basically do what I want it to.
	419	*/
	420	asmlinkage long sparc32_execve(struct pt_regs *regs)
	421	{
	422	int error, base = 0;
	423	char *filename;
	424
	425	/* User register window flush is done by entry.S */
	426
	427	/* Check for indirect call. */
	428	if ((u32)regs->u_regs[UREG_G1] == 0)
	429	base = 1;
	430
	431	filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
	432	error = PTR_ERR(filename);
	433	if (IS_ERR(filename))
	434	goto out;
	435
	436	error = compat_do_execve(filename,
	437	compat_ptr(regs->u_regs[base + UREG_I1]),
	438	compat_ptr(regs->u_regs[base + UREG_I2]), regs);
	439
440	putname(filename);
441
442	if (!error) {
443	fprs_write(0);
444	current_thread_info()->xfsr[0] = 0;
445	current_thread_info()->fpsaved[0] = 0;
446	regs->tstate &= ~TSTATE_PEF;
1da177e4 LT	447	}
	448	out:
	449	return error;
	450	}
	451
	452	#ifdef CONFIG_MODULES
	453
	454	asmlinkage long sys32_init_module(void __user *umod, u32 len,
	455	const char __user *uargs)
	456	{
	457	return sys_init_module(umod, len, uargs);
	458	}
	459
	460	asmlinkage long sys32_delete_module(const char __user *name_user,
	461	unsigned int flags)
	462	{
	463	return sys_delete_module(name_user, flags);
	464	}
	465
	466	#else /* CONFIG_MODULES */
	467
	468	asmlinkage long sys32_init_module(const char __user *name_user,
	469	struct module __user *mod_user)
	470	{
	471	return -ENOSYS;
	472	}
	473
	474	asmlinkage long sys32_delete_module(const char __user *name_user)
	475	{
	476	return -ENOSYS;
	477	}
	478
	479	#endif /* CONFIG_MODULES */
	480
1da177e4 LT	481	asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
	482	char __user *ubuf,
	483	compat_size_t count,
	484	unsigned long poshi,
	485	unsigned long poslo)
	486	{
	487	return sys_pread64(fd, ubuf, count, (poshi << 32) \| poslo);
	488	}
	489
	490	asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
	491	char __user *ubuf,
	492	compat_size_t count,
	493	unsigned long poshi,
	494	unsigned long poslo)
	495	{
	496	return sys_pwrite64(fd, ubuf, count, (poshi << 32) \| poslo);
	497	}
	498
	499	asmlinkage long compat_sys_readahead(int fd,
	500	unsigned long offhi,
	501	unsigned long offlo,
	502	compat_size_t count)
	503	{
	504	return sys_readahead(fd, (offhi << 32) \| offlo, count);
	505	}
	506
	507	long compat_sys_fadvise64(int fd,
	508	unsigned long offhi,
	509	unsigned long offlo,
	510	compat_size_t len, int advice)
	511	{
	512	return sys_fadvise64_64(fd, (offhi << 32) \| offlo, len, advice);
	513	}
	514
	515	long compat_sys_fadvise64_64(int fd,
	516	unsigned long offhi, unsigned long offlo,
	517	unsigned long lenhi, unsigned long lenlo,
	518	int advice)
	519	{
	520	return sys_fadvise64_64(fd,
	521	(offhi << 32) \| offlo,
	522	(lenhi << 32) \| lenlo,
	523	advice);
	524	}
	525
	526	asmlinkage long compat_sys_sendfile(int out_fd, int in_fd,
	527	compat_off_t __user *offset,
	528	compat_size_t count)
	529	{
	530	mm_segment_t old_fs = get_fs();
	531	int ret;
	532	off_t of;
	533
	534	if (offset && get_user(of, offset))
	535	return -EFAULT;
	536
	537	set_fs(KERNEL_DS);
	538	ret = sys_sendfile(out_fd, in_fd,
	539	offset ? (off_t __user *) &of : NULL,
	540	count);
	541	set_fs(old_fs);
	542
	543	if (offset && put_user(of, offset))
	544	return -EFAULT;
545
546	return ret;
547	}
548
549	asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd,
550	compat_loff_t __user *offset,
551	compat_size_t count)
552	{
553	mm_segment_t old_fs = get_fs();
554	int ret;
555	loff_t lof;
556
557	if (offset && get_user(lof, offset))
558	return -EFAULT;
559
560	set_fs(KERNEL_DS);
561	ret = sys_sendfile64(out_fd, in_fd,
562	offset ? (loff_t __user *) &lof : NULL,
563	count);
564	set_fs(old_fs);
565
566	if (offset && put_user(lof, offset))
567	return -EFAULT;
568
569	return ret;
570	}
571
1da177e4 LT	572	/* This is just a version for 32-bit applications which does
	573	* not force O_LARGEFILE on.
	574	*/
	575
	576	asmlinkage long sparc32_open(const char __user *filename,
	577	int flags, int mode)
	578	{
5590ff0d	579	return do_sys_open(AT_FDCWD, filename, flags, mode);
1da177e4 LT	580	}
	581
	582	extern unsigned long do_mremap(unsigned long addr,
	583	unsigned long old_len, unsigned long new_len,
	584	unsigned long flags, unsigned long new_addr);
	585
	586	asmlinkage unsigned long sys32_mremap(unsigned long addr,
	587	unsigned long old_len, unsigned long new_len,
	588	unsigned long flags, u32 __new_addr)
	589	{
1da177e4 LT	590	unsigned long ret = -EINVAL;
	591	unsigned long new_addr = __new_addr;
	592
f92ffa12	593	if (unlikely(sparc_mmap_check(addr, old_len)))
1da177e4	594	goto out;
f92ffa12	595	if (unlikely(sparc_mmap_check(new_addr, new_len)))
1da177e4 LT	596	goto out;
1da177e4 LT	597	down_write(&current->mm->mmap_sem);
1da177e4	598	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
1da177e4 LT	599	up_write(&current->mm->mmap_sem);
	600	out:
	601	return ret;
	602	}
	603
	604	struct __sysctl_args32 {
	605	u32 name;
	606	int nlen;
	607	u32 oldval;
	608	u32 oldlenp;
	609	u32 newval;
	610	u32 newlen;
	611	u32 __unused[4];
	612	};
	613
	614	asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
	615	{
b89a8171	616	#ifndef CONFIG_SYSCTL_SYSCALL
1da177e4 LT	617	return -ENOSYS;
	618	#else
	619	struct __sysctl_args32 tmp;
	620	int error;
	621	size_t oldlen, __user *oldlenp = NULL;
	622	unsigned long addr = (((unsigned long)&args->__unused[0]) + 7UL) & ~7UL;
	623
	624	if (copy_from_user(&tmp, args, sizeof(tmp)))
	625	return -EFAULT;
	626
	627	if (tmp.oldval && tmp.oldlenp) {
	628	/* Duh, this is ugly and might not work if sysctl_args
	629	is in read-only memory, but do_sysctl does indirectly
	630	a lot of uaccess in both directions and we'd have to
	631	basically copy the whole sysctl.c here, and
	632	glibc's __sysctl uses rw memory for the structure
	633	anyway. */
	634	if (get_user(oldlen, (u32 __user *)(unsigned long)tmp.oldlenp) \|\|
	635	put_user(oldlen, (size_t __user *)addr))
	636	return -EFAULT;
	637	oldlenp = (size_t __user *)addr;
	638	}
	639
	640	lock_kernel();
	641	error = do_sysctl((int __user *)(unsigned long) tmp.name,
	642	tmp.nlen,
	643	(void __user *)(unsigned long) tmp.oldval,
	644	oldlenp,
	645	(void __user *)(unsigned long) tmp.newval,
	646	tmp.newlen);
	647	unlock_kernel();
	648	if (oldlenp) {
	649	if (!error) {
	650	if (get_user(oldlen, (size_t __user *)addr) \|\|
	651	put_user(oldlen, (u32 __user *)(unsigned long) tmp.oldlenp))
	652	error = -EFAULT;
	653	}
	654	if (copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)))
	655	error = -EFAULT;
	656	}
	657	return error;
	658	#endif
	659	}
	660
	661	long sys32_lookup_dcookie(unsigned long cookie_high,
	662	unsigned long cookie_low,
	663	char __user *buf, size_t len)
	664	{
	665	return sys_lookup_dcookie((cookie_high << 32) \| cookie_low,
	666	buf, len);
	667	}
289eee6f DM	668
	669	long compat_sync_file_range(int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, int flags)
	670	{
	671	return sys_sync_file_range(fd,
	672	(off_high << 32) \| off_low,
	673	(nb_high << 32) \| nb_low,
	674	flags);
	675	}
bc5a2e64 DM	676
	677	asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
	678	u32 lenhi, u32 lenlo)
	679	{
	680	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) \| offlo,
	681	((loff_t)lenhi << 32) \| lenlo);
	682	}