usr/src/cmd/sgs/rtld/common/debugdata.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) 2001 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include "_rtld.h"
  30
  31
  32 /*
  33  * Note: for initialization of librtld_db - it's required that
  34  * the r_debug & rtlddb_priv structures be the *only data item*
  35  * in the .data section, this is the only way we can gain
  36  * full control over where it is placed.  This section is in turn
  37  * placed at the beginning of ld.so.1's data segment (which
  38  * AT_SUN_LDDATA points to :)).
  39  */
  40
  41 /*
  42  * Private structure for passing of information between librltd_db
  43  * and rtld.
  44  *
  45  * Note:  Any data that's being 'exported' to librtld_db must not
  46  *        require any 'relocations' before it can be examined.  That's
  47  *        because librtld_db will examine this structure before rtld has
  48  *        started to execute (and before it's relocated itself).  So - all
  49  *        data in this structure must be available at that point.
  50  */
  51 struct rtld_db_priv r_debug = {
  52         {
  53                 R_DEBUG_VERSION,                        /* version no. */
  54                 0,                                      /* r_map */
  55                 (unsigned long)rtld_db_dlactivity,      /* r_brk */
  56                 RT_CONSISTENT,                          /* r_state */
  57                 0,                                      /* r_ldbase */
  58                 0,                                      /* r_ldsomap */
  59                 RD_NONE,                                /* r_rdevent */
  60                 RD_FL_NONE                              /* r_flags */
  61         },
  62         R_RTLDDB_VERSION,               /* rtd_version */
  63         0,                              /* rtd_objpad */
  64         0                               /* rtd_dynlmlst */
  65 };