usr/src/lib/libproc/common/pr_mmap.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, 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)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 }