FreeBSD/Linux Kernel Cross Reference
sys/compat/osf1/osf1_generic.c

     /* $NetBSD: osf1_generic.c,v 1.13 2007/12/20 23:03:02 dsl Exp $ */
     
     /*
      * Copyright (c) 1999 Christopher G. Demetriou.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Christopher G. Demetriou
     *      for the NetBSD Project.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    /*
     * Copyright (c) 1994, 1995 Carnegie-Mellon University.
     * All rights reserved.
     *
     * Author: Chris G. Demetriou
     *
     * Permission to use, copy, modify and distribute this software and
     * its documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     *
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     *
     * Carnegie Mellon requests users of this software to return to
     *
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     *
     * any improvements or extensions that they make and grant Carnegie the
     * rights to redistribute these changes.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: osf1_generic.c,v 1.13 2007/12/20 23:03:02 dsl Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/namei.h>
    #include <sys/proc.h>
    #include <sys/file.h>
    #include <sys/stat.h>
    #include <sys/malloc.h>
    #include <sys/mman.h>
    #include <sys/mount.h>
    #include <sys/select.h>
    #include <sys/syscallargs.h>
    #include <sys/exec.h>
    
    #include <compat/osf1/osf1.h>
    #include <compat/osf1/osf1_syscallargs.h>
    #include <compat/osf1/osf1_cvt.h>
    
    /*
     * The structures end up being the same... but we can't be sure that
     * the other word of our iov_len is zero!
     */
    
    #if __GNUC_PREREQ__(3, 0)
    __attribute ((noinline))
    #endif  
    static int
    osf1_get_iov(struct osf1_iovec *uiov, unsigned int iovcnt, struct iovec **iovp)
    {
            struct iovec *iov = *iovp;
            struct osf1_iovec osf1_iov[UIO_SMALLIOV];
            int i, j, n, error;
    
            if (iovcnt > IOV_MAX)
                    return EINVAL;
    
            if (iovcnt > UIO_SMALLIOV) {
                    iov = malloc(iovcnt * sizeof *iov, M_IOV, M_WAITOK);
                   *iovp = iov;
                   /* Caller must free - even if we return an error */
           }
   
           for (i = 0; i < iovcnt; uiov += UIO_SMALLIOV, i += UIO_SMALLIOV) {
                   n = iovcnt - i;
                   if (n > UIO_SMALLIOV)
                           n = UIO_SMALLIOV;
                   error = copyin(uiov, osf1_iov, n * sizeof osf1_iov[0]);
                   if (error != 0)
                           return error;
   
                   for (j = 0; j < n; iov++, j++) {
                           iov->iov_base = osf1_iov[j].iov_base;
                           iov->iov_len = osf1_iov[j].iov_len;
                   }
           }
   
           return 0;
   }
   
   int
   osf1_sys_readv(struct lwp *l, const struct osf1_sys_readv_args *uap, register_t *retval)
   {
           struct iovec aiov[UIO_SMALLIOV], *niov = aiov;
           int error;
   
           error = osf1_get_iov(SCARG(uap, iovp), SCARG(uap, iovcnt), &niov);
   
           if (error == 0) {
                   error = do_filereadv(SCARG(uap, fd), niov,
                       SCARG(uap, iovcnt), NULL,
                       FOF_UPDATE_OFFSET | FOF_IOV_SYSSPACE, retval);
           }
   
           if (niov != aiov)
                   free(niov, M_IOV);
   
           return error;
   }
   
   int
   osf1_sys_writev(struct lwp *l, const struct osf1_sys_writev_args *uap, register_t *retval)
   {
           struct iovec aiov[UIO_SMALLIOV], *niov = aiov;
           int error;
   
           error = osf1_get_iov(SCARG(uap, iovp), SCARG(uap, iovcnt), &niov);
   
           if (error == 0) {
                   error = do_filewritev(SCARG(uap, fd), niov,
                       SCARG(uap, iovcnt), NULL,
                       FOF_UPDATE_OFFSET | FOF_IOV_SYSSPACE, retval);
           }
   
           if (niov != aiov)
                   free(niov, M_IOV);
   
           return error;
   }
   
   int
   osf1_sys_select(struct lwp *l, const struct osf1_sys_select_args *uap, register_t *retval)
   {
           struct osf1_timeval otv;
           struct timeval tv, *tvp;
           int error;
   
           if (SCARG(uap, tv) == NULL)
                   tvp = NULL;
           else {
                   /* get the OSF/1 timeval argument */
                   error = copyin(SCARG(uap, tv), &otv, sizeof otv);
                   if (error != 0)
                           return error;
   
                   /* copy to the NetBSD timeval */
                   tv.tv_sec = otv.tv_sec;
                   tv.tv_usec = otv.tv_usec;
                   tvp = &tv;
           }
   
           return selcommon(l, retval, SCARG(uap, nd), SCARG(uap, in),
               SCARG(uap, ou), SCARG(uap, ex), tvp, NULL);
   }

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