1 /*- 2 * Copyright (c) 2006,2008-2009,2011 Joseph Koshy 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 29 #include <assert.h> 30 #include <libelf.h> 31 #include <stdlib.h> 32 33 #include "_libelf.h" 34 35 #if ELFTC_HAVE_MMAP 36 #include <sys/mman.h> 37 #endif 38 39 ELFTC_VCSID("$Id: elf_end.c 2240 2011-11-28 06:36:48Z jkoshy $"); 40 41 int 42 elf_end(Elf *e) 43 { 44 Elf *sv; 45 Elf_Scn *scn, *tscn; 46 47 if (e == NULL || e->e_activations == 0) 48 return (0); 49 50 if (--e->e_activations > 0) 51 return (e->e_activations); 52 53 assert(e->e_activations == 0); 54 55 while (e && e->e_activations == 0) { 56 switch (e->e_kind) { 57 case ELF_K_AR: 58 /* 59 * If we still have open child descriptors, we 60 * need to defer reclaiming resources till all 61 * the child descriptors for the archive are 62 * closed. 63 */ 64 if (e->e_u.e_ar.e_nchildren > 0) 65 return (0); 66 break; 67 case ELF_K_ELF: 68 /* 69 * Reclaim all section descriptors. 70 */ 71 STAILQ_FOREACH_SAFE(scn, &e->e_u.e_elf.e_scn, s_next, 72 tscn) 73 scn = _libelf_release_scn(scn); 74 break; 75 case ELF_K_NUM: 76 assert(0); 77 default: 78 break; 79 } 80 81 if (e->e_rawfile) { 82 if (e->e_flags & LIBELF_F_RAWFILE_MALLOC) 83 free(e->e_rawfile); 84 #if ELFTC_HAVE_MMAP 85 else if (e->e_flags & LIBELF_F_RAWFILE_MMAP) 86 (void) munmap(e->e_rawfile, e->e_rawsize); 87 #endif 88 } 89 90 sv = e; 91 if ((e = e->e_parent) != NULL) 92 e->e_u.e_ar.e_nchildren--; 93 sv = _libelf_release_elf(sv); 94 } 95 96 return (0); 97 } 98