1 /* $NetBSD: elf_end.c,v 1.3 2016/02/20 02:43:42 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2006,2008-2009,2011 Joseph Koshy 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #if HAVE_NBTOOL_CONFIG_H 30 # include "nbtool_config.h" 31 #endif 32 33 #include <sys/cdefs.h> 34 35 #include <assert.h> 36 #include <libelf.h> 37 #include <stdlib.h> 38 39 #include "_libelf.h" 40 41 #if ELFTC_HAVE_MMAP 42 #include <sys/mman.h> 43 #endif 44 45 __RCSID("$NetBSD: elf_end.c,v 1.3 2016/02/20 02:43:42 christos Exp $"); 46 ELFTC_VCSID("Id: elf_end.c 3174 2015-03-27 17:13:41Z emaste "); 47 48 int 49 elf_end(Elf *e) 50 { 51 Elf *sv; 52 Elf_Scn *scn, *tscn; 53 54 if (e == NULL || e->e_activations == 0) 55 return (0); 56 57 if (--e->e_activations > 0) 58 return (e->e_activations); 59 60 assert(e->e_activations == 0); 61 62 while (e && e->e_activations == 0) { 63 switch (e->e_kind) { 64 case ELF_K_AR: 65 /* 66 * If we still have open child descriptors, we 67 * need to defer reclaiming resources till all 68 * the child descriptors for the archive are 69 * closed. 70 */ 71 if (e->e_u.e_ar.e_nchildren > 0) 72 return (0); 73 break; 74 case ELF_K_ELF: 75 /* 76 * Reclaim all section descriptors. 77 */ 78 STAILQ_FOREACH_SAFE(scn, &e->e_u.e_elf.e_scn, s_next, 79 tscn) 80 scn = _libelf_release_scn(scn); 81 break; 82 case ELF_K_NUM: 83 assert(0); 84 default: 85 break; 86 } 87 88 if (e->e_rawfile) { 89 if (e->e_flags & LIBELF_F_RAWFILE_MALLOC) 90 free(e->e_rawfile); 91 #if ELFTC_HAVE_MMAP 92 else if (e->e_flags & LIBELF_F_RAWFILE_MMAP) 93 (void) munmap(e->e_rawfile, e->e_rawsize); 94 #endif 95 } 96 97 sv = e; 98 if ((e = e->e_parent) != NULL) 99 e->e_u.e_ar.e_nchildren--; 100 sv = _libelf_release_elf(sv); 101 } 102 103 return (0); 104 } 105