sys_sparc32.c

来自「优龙2410linux2.6.8内核源代码」· C语言 代码 · 共 1,739 行 · 第 1/4 页

{
	return -ENOSYS;
}

#endif  /* CONFIG_MODULES */

/* Translations due to time_t size differences.  Which affects all
   sorts of things, like timeval and itimerval.  */

extern struct timezone sys_tz;

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

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

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

asmlinkage long 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);
}

asmlinkage long sys32_utimes(char __user *filename,
			     struct compat_timeval __user *tvs)
{
	struct timeval ktvs[2];

	if (tvs) {
		if (get_tv32(&ktvs[0], tvs) ||
		    get_tv32(&ktvs[1], 1+tvs))
			return -EFAULT;
	}

	return do_utimes(filename, (tvs ? &ktvs[0] : NULL));
}

/* These are here just in case some old sparc32 binary calls it. */
asmlinkage long sys32_pause(void)
{
	current->state = TASK_INTERRUPTIBLE;
	schedule();
	return -ERESTARTNOHAND;
}

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;
}

/* Handle adjtimex compatibility. */

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

extern int do_adjtimex(struct timex *);

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

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

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

	ret = do_adjtimex(&txc);

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

	return ret;
}

/* 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)
{
	char * tmp;
	int fd, error;

	tmp = getname(filename);
	fd = PTR_ERR(tmp);
	if (!IS_ERR(tmp)) {
		fd = get_unused_fd();
		if (fd >= 0) {
			struct file * f = filp_open(tmp, flags, mode);
			error = PTR_ERR(f);
			if (IS_ERR(f))
				goto out_error;
			fd_install(fd, f);
		}
out:
		putname(tmp);
	}
	return fd;

out_error:
	put_unused_fd(fd);
	fd = error;
	goto out;
}

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)
{
	struct vm_area_struct *vma;
	unsigned long ret = -EINVAL;
	unsigned long new_addr = __new_addr;

	if (old_len > 0xf0000000UL || new_len > 0xf0000000UL)
		goto out;
	if (addr > 0xf0000000UL - old_len)
		goto out;
	down_write(&current->mm->mmap_sem);
	if (flags & MREMAP_FIXED) {
		if (new_addr > 0xf0000000UL - new_len)
			goto out_sem;
	} else if (addr > 0xf0000000UL - new_len) {
		unsigned long map_flags = 0;
		struct file *file = NULL;

		ret = -ENOMEM;
		if (!(flags & MREMAP_MAYMOVE))
			goto out_sem;

		vma = find_vma(current->mm, addr);
		if (vma) {
			if (vma->vm_flags & VM_SHARED)
				map_flags |= MAP_SHARED;
			file = vma->vm_file;
		}

		/* MREMAP_FIXED checked above. */
		new_addr = get_unmapped_area(file, addr, new_len,
				    vma ? vma->vm_pgoff : 0,
				    map_flags);
		ret = new_addr;
		if (new_addr & ~PAGE_MASK)
			goto out_sem;
		flags |= MREMAP_FIXED;
	}
	ret = do_mremap(addr, old_len, new_len, flags, new_addr);
out_sem:
	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
	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;
		}
		copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
	}
	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);
}

extern asmlinkage long
sys_timer_create(clockid_t which_clock,
		 struct sigevent __user *timer_event_spec,
		 timer_t __user *created_timer_id);

long
sys32_timer_create(u32 clock, struct sigevent32 __user *se32,
		   timer_t __user *timer_id)
{
	struct sigevent se;
	mm_segment_t oldfs;
	timer_t t;
	long err;

	if (se32 == NULL)
		return sys_timer_create(clock, NULL, timer_id);

	memset(&se, 0, sizeof(struct sigevent));
	if (get_user(se.sigev_value.sival_int,  &se32->sigev_value.sival_int) ||
	    __get_user(se.sigev_signo, &se32->sigev_signo) ||
	    __get_user(se.sigev_notify, &se32->sigev_notify) ||
	    __copy_from_user(&se._sigev_un._pad, &se32->_sigev_un._pad,
	    sizeof(se._sigev_un._pad)))
		return -EFAULT;

	if (!access_ok(VERIFY_WRITE,timer_id,sizeof(timer_t)))
		return -EFAULT;

	oldfs = get_fs();
	set_fs(KERNEL_DS);
	err = sys_timer_create(clock,
			       (struct sigevent __user *) &se,
			       (timer_t __user *) &t);
	set_fs(oldfs);

	if (!err)
		err = __put_user (t, timer_id);

	return err;
}