1 | /*- |
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2 | * Copyright (c) 2006,2008-2009,2011 Joseph Koshy |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * |
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14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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24 | * SUCH DAMAGE. |
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25 | */ |
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26 | |
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27 | #include <sys/cdefs.h> |
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28 | |
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29 | #include <sys/mman.h> |
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30 | |
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31 | #include <assert.h> |
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32 | #include <libelf.h> |
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33 | #include <stdlib.h> |
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34 | |
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35 | #include "_libelf.h" |
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36 | |
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37 | LIBELF_VCSID("$Id: elf_end.c 1922 2011-09-23 08:04:33Z jkoshy $"); |
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38 | |
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39 | int |
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40 | elf_end(Elf *e) |
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41 | { |
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42 | Elf *sv; |
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43 | Elf_Scn *scn, *tscn; |
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44 | |
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45 | if (e == NULL || e->e_activations == 0) |
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46 | return (0); |
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47 | |
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48 | if (--e->e_activations > 0) |
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49 | return (e->e_activations); |
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50 | |
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51 | assert(e->e_activations == 0); |
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52 | |
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53 | while (e && e->e_activations == 0) { |
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54 | switch (e->e_kind) { |
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55 | case ELF_K_AR: |
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56 | /* |
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57 | * If we still have open child descriptors, we |
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58 | * need to defer reclaiming resources till all |
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59 | * the child descriptors for the archive are |
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60 | * closed. |
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61 | */ |
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62 | if (e->e_u.e_ar.e_nchildren > 0) |
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63 | return (0); |
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64 | break; |
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65 | case ELF_K_ELF: |
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66 | /* |
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67 | * Reclaim all section descriptors. |
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68 | */ |
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69 | STAILQ_FOREACH_SAFE(scn, &e->e_u.e_elf.e_scn, s_next, |
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70 | tscn) |
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71 | scn = _libelf_release_scn(scn); |
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72 | break; |
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73 | case ELF_K_NUM: |
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74 | assert(0); |
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75 | default: |
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76 | break; |
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77 | } |
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78 | |
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79 | if (e->e_rawfile) { |
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80 | if (e->e_flags & LIBELF_F_RAWFILE_MMAP) |
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81 | (void) munmap(e->e_rawfile, e->e_rawsize); |
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82 | else if (e->e_flags & LIBELF_F_RAWFILE_MALLOC) |
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83 | free(e->e_rawfile); |
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84 | } |
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85 | |
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86 | sv = e; |
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87 | if ((e = e->e_parent) != NULL) |
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88 | e->e_u.e_ar.e_nchildren--; |
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89 | sv = _libelf_release_elf(sv); |
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90 | } |
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91 | |
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92 | return (0); |
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93 | } |
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