Home | History | Annotate | Download | only in common
      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, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright (c) 1997-2000 by Sun Microsystems, Inc.
     24  * All rights reserved.
     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 <sys/mman.h>
     33 #include "libproc.h"
     34 
     35 /*
     36  * mmap() system call -- executed by subject process
     37  */
     38 void *
     39 pr_mmap(struct ps_prochandle *Pr,
     40 	void *addr, size_t len, int prot, int flags, int fd, off_t off)
     41 {
     42 	sysret_t rval;			/* return value from mmap() */
     43 	argdes_t argd[6];		/* arg descriptors for mmap() */
     44 	argdes_t *adp;
     45 	int error;
     46 
     47 	if (Pr == NULL)		/* no subject process */
     48 		return (mmap(addr, len, prot, flags, fd, off));
     49 
     50 	adp = &argd[0];		/* addr argument */
     51 	adp->arg_value = (long)addr;
     52 	adp->arg_object = NULL;
     53 	adp->arg_type = AT_BYVAL;
     54 	adp->arg_inout = AI_INPUT;
     55 	adp->arg_size = 0;
     56 
     57 	adp++;			/* len argument */
     58 	adp->arg_value = (long)len;
     59 	adp->arg_object = NULL;
     60 	adp->arg_type = AT_BYVAL;
     61 	adp->arg_inout = AI_INPUT;
     62 	adp->arg_size = 0;
     63 
     64 	adp++;			/* prot argument */
     65 	adp->arg_value = (long)prot;
     66 	adp->arg_object = NULL;
     67 	adp->arg_type = AT_BYVAL;
     68 	adp->arg_inout = AI_INPUT;
     69 	adp->arg_size = 0;
     70 
     71 	adp++;			/* flags argument */
     72 	adp->arg_value = (long)(_MAP_NEW|flags);
     73 	adp->arg_object = NULL;
     74 	adp->arg_type = AT_BYVAL;
     75 	adp->arg_inout = AI_INPUT;
     76 	adp->arg_size = 0;
     77 
     78 	adp++;			/* fd argument */
     79 	adp->arg_value = (long)fd;
     80 	adp->arg_object = NULL;
     81 	adp->arg_type = AT_BYVAL;
     82 	adp->arg_inout = AI_INPUT;
     83 	adp->arg_size = 0;
     84 
     85 	adp++;			/* off argument */
     86 	adp->arg_value = (long)off;
     87 	adp->arg_object = NULL;
     88 	adp->arg_type = AT_BYVAL;
     89 	adp->arg_inout = AI_INPUT;
     90 	adp->arg_size = 0;
     91 
     92 	error = Psyscall(Pr, &rval, SYS_mmap, 6, &argd[0]);
     93 
     94 	if (error) {
     95 		errno = (error > 0)? error : ENOSYS;
     96 		return ((void *)(-1));
     97 	}
     98 	return ((void *)rval.sys_rval1);
     99 }
    100 
    101 /*
    102  * munmap() system call -- executed by subject process
    103  */
    104 int
    105 pr_munmap(struct ps_prochandle *Pr, void *addr, size_t len)
    106 {
    107 	sysret_t rval;			/* return value from munmap() */
    108 	argdes_t argd[2];		/* arg descriptors for munmap() */
    109 	argdes_t *adp;
    110 	int error;
    111 
    112 	if (Pr == NULL)		/* no subject process */
    113 		return (munmap(addr, len));
    114 
    115 	adp = &argd[0];		/* addr argument */
    116 	adp->arg_value = (long)addr;
    117 	adp->arg_object = NULL;
    118 	adp->arg_type = AT_BYVAL;
    119 	adp->arg_inout = AI_INPUT;
    120 	adp->arg_size = 0;
    121 
    122 	adp++;			/* len argument */
    123 	adp->arg_value = (long)len;
    124 	adp->arg_object = NULL;
    125 	adp->arg_type = AT_BYVAL;
    126 	adp->arg_inout = AI_INPUT;
    127 	adp->arg_size = 0;
    128 
    129 	error = Psyscall(Pr, &rval, SYS_munmap, 2, &argd[0]);
    130 
    131 	if (error) {
    132 		errno = (error > 0)? error : ENOSYS;
    133 		return (-1);
    134 	}
    135 	return (rval.sys_rval1);
    136 }
    137 
    138 /*
    139  * zmap() -- convenience function; mmap(MAP_ANON) executed by subject process.
    140  */
    141 void *
    142 pr_zmap(struct ps_prochandle *Pr, void *addr, size_t len, int prot, int flags)
    143 {
    144 	return (pr_mmap(Pr, addr, len, prot, flags | MAP_ANON, -1, (off_t)0));
    145 }
    146