usr/src/cmd/sgs/libelf/common/end.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 #include <ar.h>
  31 #include <stdlib.h>
  32 #include "libelf.h"
  33 #include "decl.h"
  34 #include "member.h"
  35
  36 int
  37 elf_end(Elf * elf)
  38 {
  39         Elf_Scn *       s;
  40         Dnode * d;
  41         Elf_Void *              trail = 0;
  42         int                     rc;
  43
  44         if (elf == 0)
  45                 return (0);
  46
  47         ELFWLOCK(elf)
  48         if (--elf->ed_activ != 0) {
  49                 rc = elf->ed_activ;
  50                 ELFUNLOCK(elf)
  51                 return (rc);
  52         }
  53
  54         while (elf->ed_activ == 0) {
  55                 for (s = elf->ed_hdscn; s != 0; s = s->s_next) {
  56                         if (s->s_myflags & SF_ALLOC) {
  57                                 if (trail != 0)
  58                                         free(trail);
  59                                 trail = (Elf_Void *)s;
  60                         }
  61
  62                         if ((s->s_myflags & SF_READY) == 0)
  63                                 continue;
  64                         for (d = s->s_hdnode; d != 0; ) {
  65                                 register Dnode  *t;
  66
  67                                 if (d->db_buf != 0)
  68                                         free(d->db_buf);
  69                                 if ((t = d->db_raw) != 0) {
  70                                         if (t->db_buf != 0)
  71                                                 free(t->db_buf);
  72                                         if (t->db_myflags & DBF_ALLOC)
  73                                                 free(t);
  74                                 }
  75                                 t = d->db_next;
  76                                 if (d->db_myflags & DBF_ALLOC)
  77                                         free(d);
  78                                 d = t;
  79                         }
  80                 }
  81                 if (trail != 0) {
  82                         free(trail);
  83                         trail = 0;
  84                 }
  85
  86                 {
  87                         register Memlist        *l;
  88                         register Memident       *i;
  89
  90                         for (l = elf->ed_memlist; l; l = (Memlist *)trail) {
  91                                 trail = (Elf_Void *)l->m_next;
  92                                 for (i = (Memident *)(l + 1); i < l->m_free;
  93                                     i++)
  94                                         free(i->m_member);
  95                                 free(l);
  96                         }
  97                 }
  98                 if (elf->ed_myflags & EDF_EHALLOC)
  99                         free(elf->ed_ehdr);
 100                 if (elf->ed_myflags & EDF_PHALLOC)
 101                         free(elf->ed_phdr);
 102                 if (elf->ed_myflags & EDF_SHALLOC)
 103                         free(elf->ed_shdr);
 104                 if (elf->ed_myflags & EDF_RAWALLOC)
 105                         free(elf->ed_raw);
 106                 if (elf->ed_myflags & EDF_ASALLOC)
 107                         free(elf->ed_arsym);
 108                 if (elf->ed_myflags & EDF_ASTRALLOC)
 109                         free(elf->ed_arstr);
 110
 111                 /*
 112                  * Don't release the image until the last reference dies.
 113                  * If the image was introduced via elf_memory() then
 114                  * we don't release it at all, it's not ours to release.
 115                  */
 116
 117                 if (elf->ed_parent == 0) {
 118                         if (elf->ed_vm != 0)
 119                                 free(elf->ed_vm);
 120                         else if ((elf->ed_myflags & EDF_MEMORY) == 0)
 121                                 _elf_unmap(elf->ed_image, elf->ed_imagesz);
 122                 }
 123                 trail = (Elf_Void *)elf;
 124                 elf = elf->ed_parent;
 125                 ELFUNLOCK(trail)
 126                 free(trail);
 127                 if (elf == 0)
 128                         break;
 129                 /*
 130                  * If parent is inactive we close
 131                  * it too, so we need to lock it too.
 132                  */
 133                 ELFWLOCK(elf)
 134                 --elf->ed_activ;
 135         }
 136
 137         if (elf) {
 138                 ELFUNLOCK(elf)
 139         }
 140
 141         return (0);
 142 }