usr/src/lib/libproc/common/pr_door.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <stdlib.h>
  30 #include <unistd.h>
  31 #include <errno.h>
  32 #include <door.h>
  33 #include "libproc.h"
  34
  35 /*
  36  * door() system calls -- executed by subject process
  37  */
  38
  39 int
  40 pr_door_info(struct ps_prochandle *Pr, int did, door_info_t *di)
  41 {
  42         sysret_t rval;                  /* return value from door_info() */
  43         argdes_t argd[6];               /* arg descriptors for door_info() */
  44         argdes_t *adp = &argd[0];       /* first argument */
  45         int error;
  46
  47         if (Pr == NULL)         /* no subject process */
  48                 return (door_info(did, di));
  49
  50         adp->arg_value = did;
  51         adp->arg_object = NULL;
  52         adp->arg_type = AT_BYVAL;
  53         adp->arg_inout = AI_INPUT;
  54         adp->arg_size = 0;
  55         adp++;                  /* move to door_info_t argument */
  56
  57         adp->arg_value = 0;
  58         adp->arg_object = di;
  59         adp->arg_type = AT_BYREF;
  60         adp->arg_inout = AI_OUTPUT;
  61         adp->arg_size = sizeof (door_info_t);
  62         adp++;                  /* move to unused argument */
  63
  64         adp->arg_value = 0;
  65         adp->arg_object = NULL;
  66         adp->arg_type = AT_BYVAL;
  67         adp->arg_inout = AI_INPUT;
  68         adp->arg_size = 0;
  69         adp++;                  /* move to unused argument */
  70
  71         adp->arg_value = 0;
  72         adp->arg_object = NULL;
  73         adp->arg_type = AT_BYVAL;
  74         adp->arg_inout = AI_INPUT;
  75         adp->arg_size = 0;
  76         adp++;                  /* move to unused argument */
  77
  78         adp->arg_value = 0;
  79         adp->arg_object = NULL;
  80         adp->arg_type = AT_BYVAL;
  81         adp->arg_inout = AI_INPUT;
  82         adp->arg_size = 0;
  83         adp++;                  /* move to subcode argument */
  84
  85         adp->arg_value = DOOR_INFO;
  86         adp->arg_object = NULL;
  87         adp->arg_type = AT_BYVAL;
  88         adp->arg_inout = AI_INPUT;
  89         adp->arg_size = 0;
  90
  91         error = Psyscall(Pr, &rval, SYS_door, 6, &argd[0]);
  92
  93         if (error) {
  94                 errno = (error < 0)? ENOSYS : error;
  95                 return (-1);
  96         }
  97         return (0);
  98 }