usr/src/cmd/sgs/libelf/common/data.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #include <libelf.h>
  31 #include "decl.h"
  32
  33 /*
  34  * Global data
  35  * _elf_byte            Fill byte for file padding.  See elf_fill().
  36  * _elf32_ehdr_init     Clean copy for to initialize new headers.
  37  * _elf64_ehdr_init     Clean copy for to initialize new class-64 headers.
  38  * _elf_encode          Host/internal data encoding.  If the host has
  39  *                      an encoding that matches one known for the
  40  *                      ELF format, this changes.  An machine with an
  41  *                      unknown encoding keeps ELFDATANONE and forces
  42  *                      conversion for host/target translation.
  43  * _elf_work            Working version given to the lib by application.
  44  *                      See elf_version().
  45  * _elf_globals_mutex   mutex to protect access to all global data items.
  46  * _elf_execfill_func   Fill function for file padding of SHF_EXECINSTR
  47  *                      sections. See _elf_execfill().
  48  */
  49
  50 /*
  51  * __libc_threaded is a private symbol exported from libc in Solaris 10.
  52  * It is used to tell if we are running in a threaded world or not.
  53  * Between Solaris 2.5 and Solaris 9, this was named __threaded.
  54  * The name had to be changed because the Sun Workshop 6 update 1
  55  * compilation system used it to mean "we are linked with libthread"
  56  * rather than its true meaning in Solaris 10, "more than one thread exists".
  57  */
  58 #pragma weak            __libc_threaded
  59 extern int              __libc_threaded;
  60
  61 int                     _elf_byte = 0;
  62 const Elf32_Ehdr        _elf32_ehdr_init = { 0 };
  63 const Elf64_Ehdr        _elf64_ehdr_init = { 0 };
  64 unsigned                _elf_encode = ELFDATANONE;
  65 _elf_execfill_func_t    *_elf_execfill_func = NULL;
  66 const Snode32           _elf32_snode_init = { 0 };
  67 const Snode64           _elf64_snode_init = { 0 };
  68 const Dnode             _elf_dnode_init = { 0 };
  69 unsigned                _elf_work = EV_NONE;
  70 mutex_t                 _elf_globals_mutex = DEFAULTMUTEX;
  71
  72 int                     *_elf_libc_threaded = &__libc_threaded;