usr/src/cmd/sgs/libelf/common/member.h

   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 /*      Copyright (c) 1988 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 /*
  27  * Copyright (c) 1995 by Sun Microsystems, Inc.
  28  * All rights reserved.
  29  */
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"        /* SVr4.0 1.2   */
  32
  33
  34
  35 /*
  36  * Member handling
  37  *      Archive members have an ASCII header.  A Member structure
  38  *      holds internal information.  Because the ASCII file header
  39  *      may be clobbered, Member holds a private, safe copy.
  40  *      The ar_name member of m_hdr points at m_name except for string
  41  *      table names.  Ar_rawname in m_hdr always points at m_raw.
  42  *
  43  *      m_raw   The original ar_name with null termination.
  44  *              E.g., "name/           "
  45  *
  46  *      m_name  The processed name, with '/' terminator changed to '\0'.
  47  *              Unused for string table names.  E.g., "name\0           "
  48  *
  49  *      To improve performance of member lookup we allocate lists which
  50  *      contain MEMIDENTNO members:
  51  *
  52  *      ed_memlist -->   ---------------------
  53  *                      |       m_next        |
  54  *                      |       m_end         |
  55  *                      |       m_free        |
  56  *                      |---------------------|
  57  *                      | m_offset | m_member |
  58  *                      | m_offset | m_member |
  59  *                      |     "    |    "     |
  60  *                       ---------------------
  61  */
  62
  63
  64 #define ARSZ(m)         (sizeof ((struct ar_hdr *)0)->m)
  65
  66 #define MEMIDENTNO      126
  67
  68 struct  Member
  69 {
  70         Elf_Arhdr       m_hdr;
  71         int             m_err;
  72         long            m_slide;
  73         char            m_raw[ARSZ(ar_name)+1];
  74         char            m_name[ARSZ(ar_name)+1];
  75 };
  76
  77 struct  Memident
  78 {
  79         char *          m_offset;
  80         struct Member * m_member;
  81 };
  82
  83 struct  Memlist
  84 {
  85         struct Memlist *        m_next;
  86         struct Memident *       m_end;
  87         struct Memident *       m_free;
  88 };