/*
 * 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 (c) 1997-2000 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/mman.h>
#include "libproc.h"

/*
 * mmap() system call -- executed by subject process
 */
void *
pr_mmap(struct ps_prochandle *Pr,
        void *addr, size_t len, int prot, int flags, int fd, off_t off)
{
        sysret_t rval;                  /* return value from mmap() */
        argdes_t argd[6];               /* arg descriptors for mmap() */
        argdes_t *adp;
        int error;

        if (Pr == NULL)         /* no subject process */
                return (mmap(addr, len, prot, flags, fd, off));

        adp = &argd[0];         /* addr argument */
        adp->arg_value = (long)addr;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

        adp++;                  /* len argument */
        adp->arg_value = (long)len;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

        adp++;                  /* prot argument */
        adp->arg_value = (long)prot;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

        adp++;                  /* flags argument */
        adp->arg_value = (long)(_MAP_NEW|flags);
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

        adp++;                  /* fd argument */
        adp->arg_value = (long)fd;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

        adp++;                  /* off argument */
        adp->arg_value = (long)off;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

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

        if (error) {
                errno = (error > 0)? error : ENOSYS;
                return ((void *)(-1));
        }
        return ((void *)rval.sys_rval1);
}

/*
 * munmap() system call -- executed by subject process
 */
int
pr_munmap(struct ps_prochandle *Pr, void *addr, size_t len)
{
        sysret_t rval;                  /* return value from munmap() */
        argdes_t argd[2];               /* arg descriptors for munmap() */
        argdes_t *adp;
        int error;

        if (Pr == NULL)         /* no subject process */
                return (munmap(addr, len));

        adp = &argd[0];         /* addr argument */
        adp->arg_value = (long)addr;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

        adp++;                  /* len argument */
        adp->arg_value = (long)len;
        adp->arg_object = NULL;
        adp->arg_type = AT_BYVAL;
        adp->arg_inout = AI_INPUT;
        adp->arg_size = 0;

        error = Psyscall(Pr, &rval, SYS_munmap, 2, &argd[0]);

        if (error) {
                errno = (error > 0)? error : ENOSYS;
                return (-1);
        }
        return (rval.sys_rval1);
}

/*
 * zmap() -- convenience function; mmap(MAP_ANON) executed by subject process.
 */
void *
pr_zmap(struct ps_prochandle *Pr, void *addr, size_t len, int prot, int flags)
{
        return (pr_mmap(Pr, addr, len, prot, flags | MAP_ANON, -1, (off_t)0));
}