libproc/common/pr_door.c

	pr_door.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <door.h>
#include "libproc.h"

/*
 * door() system calls -- executed by subject process
 */

int
pr_door_info(struct ps_prochandle *Pr, int did, door_info_t *di)
{
    sysret_t rval;          /* return value from _door_info() */
    argdes_t argd[6];       /* arg descriptors for _door_info() */
    argdes_t *adp = &argd[0];   /* first argument */
    int error;

    if (Pr == NULL)     /* no subject process */
        return (door_info(did, di));

    adp->arg_value = did;
    adp->arg_object = NULL;
    adp->arg_type = AT_BYVAL;
    adp->arg_inout = AI_INPUT;
    adp->arg_size = 0;
    adp++;          /* move to door_info_t argument */

    adp->arg_value = 0;
    adp->arg_object = di;
    adp->arg_type = AT_BYREF;
    adp->arg_inout = AI_OUTPUT;
    adp->arg_size = sizeof (door_info_t);
    adp++;          /* move to unused argument */

    adp->arg_value = 0;
    adp->arg_object = NULL;
    adp->arg_type = AT_BYVAL;
    adp->arg_inout = AI_INPUT;
    adp->arg_size = 0;
    adp++;          /* move to unused argument */

    adp->arg_value = 0;
    adp->arg_object = NULL;
    adp->arg_type = AT_BYVAL;
    adp->arg_inout = AI_INPUT;
    adp->arg_size = 0;
    adp++;          /* move to unused argument */

    adp->arg_value = 0;
    adp->arg_object = NULL;
    adp->arg_type = AT_BYVAL;
    adp->arg_inout = AI_INPUT;
    adp->arg_size = 0;
    adp++;          /* move to subcode argument */

    adp->arg_value = DOOR_INFO;
    adp->arg_object = NULL;
    adp->arg_type = AT_BYVAL;
    adp->arg_inout = AI_INPUT;
    adp->arg_size = 0;

    error = Psyscall(Pr, &rval, SYS_door, 6, &argd[0]);

    if (error) {
        errno = (error < 0)? ENOSYS : error;
        return (-1);
    }
    return (0);
}