usr/src/cmd/sgs/libelf/common/rawfile.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 2008 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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include "libelf.h"
  33 #include "decl.h"
  34
  35
  36 char *
  37 elf_rawfile(Elf *elf, size_t *ptr)
  38 {
  39         register size_t sz;
  40         char            *p = 0;
  41
  42         if (elf == 0) {
  43                 if (ptr != 0)
  44                         *ptr = 0;
  45                 return (0);
  46         }
  47
  48         ELFWLOCK(elf)
  49         if ((sz = elf->ed_fsz) == 0) {
  50                 if (ptr != 0)
  51                         *ptr = 0;
  52                 ELFUNLOCK(elf)
  53                 return (0);
  54         }
  55
  56         if (elf->ed_raw != 0)
  57                 p = elf->ed_raw;
  58         else if (elf->ed_status == ES_COOKED) {
  59                 if ((p = _elf_read(elf->ed_fd, elf->ed_baseoff, sz)) != 0) {
  60                         elf->ed_raw = p;
  61                         elf->ed_myflags |= EDF_RAWALLOC;
  62                 } else
  63                         sz = 0;
  64         } else {
  65                 p = elf->ed_raw = elf->ed_ident;
  66                 elf->ed_status = ES_FROZEN;
  67                 if (_elf_vm(elf, (size_t)0, elf->ed_fsz) != OK_YES) {
  68                         p = 0;
  69                         sz = 0;
  70                 }
  71         }
  72         if (ptr != 0)
  73                 *ptr = sz;
  74         ELFUNLOCK(elf)
  75         return (p);
  76 }