| Brian Silverman | 8649792 | 2018-02-10 19:28:39 -0500 | [diff] [blame] | 1 | /* Return number of sections in the ELF file. |
| 2 | Copyright (C) 2002, 2009, 2015 Red Hat, Inc. |
| 3 | This file is part of elfutils. |
| 4 | Written by Ulrich Drepper <drepper@redhat.com>, 2002. |
| 5 | |
| 6 | This file is free software; you can redistribute it and/or modify |
| 7 | it under the terms of either |
| 8 | |
| 9 | * the GNU Lesser General Public License as published by the Free |
| 10 | Software Foundation; either version 3 of the License, or (at |
| 11 | your option) any later version |
| 12 | |
| 13 | or |
| 14 | |
| 15 | * the GNU General Public License as published by the Free |
| 16 | Software Foundation; either version 2 of the License, or (at |
| 17 | your option) any later version |
| 18 | |
| 19 | or both in parallel, as here. |
| 20 | |
| 21 | elfutils is distributed in the hope that it will be useful, but |
| 22 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 24 | General Public License for more details. |
| 25 | |
| 26 | You should have received copies of the GNU General Public License and |
| 27 | the GNU Lesser General Public License along with this program. If |
| 28 | not, see <http://www.gnu.org/licenses/>. */ |
| 29 | |
| 30 | #ifdef HAVE_CONFIG_H |
| 31 | # include <config.h> |
| 32 | #endif |
| 33 | |
| 34 | #include <assert.h> |
| 35 | #include <gelf.h> |
| 36 | #include <stddef.h> |
| 37 | |
| 38 | #include "libelfP.h" |
| 39 | |
| 40 | |
| 41 | int |
| 42 | internal_function |
| 43 | __elf_getshdrnum_rdlock (Elf *elf, size_t *dst) |
| 44 | { |
| 45 | int result = 0; |
| 46 | int idx; |
| 47 | |
| 48 | if (elf == NULL) |
| 49 | return -1; |
| 50 | |
| 51 | if (unlikely (elf->kind != ELF_K_ELF)) |
| 52 | { |
| 53 | __libelf_seterrno (ELF_E_INVALID_HANDLE); |
| 54 | return -1; |
| 55 | } |
| 56 | |
| 57 | idx = elf->state.elf.scns_last->cnt; |
| 58 | if (idx != 0 |
| 59 | || (elf->state.elf.scns_last |
| 60 | != (elf->class == ELFCLASS32 |
| 61 | || (offsetof (Elf, state.elf32.scns) |
| 62 | == offsetof (Elf, state.elf64.scns)) |
| 63 | ? &elf->state.elf32.scns : &elf->state.elf64.scns))) |
| 64 | /* There is at least one section. */ |
| 65 | *dst = 1 + elf->state.elf.scns_last->data[idx - 1].index; |
| 66 | else |
| 67 | *dst = 0; |
| 68 | |
| 69 | return result; |
| 70 | } |
| 71 | |
| 72 | int |
| 73 | elf_getshdrnum (Elf *elf, size_t *dst) |
| 74 | { |
| 75 | int result; |
| 76 | |
| 77 | if (elf == NULL) |
| 78 | return -1; |
| 79 | |
| 80 | rwlock_rdlock (elf->lock); |
| 81 | result = __elf_getshdrnum_rdlock (elf, dst); |
| 82 | rwlock_unlock (elf->lock); |
| 83 | |
| 84 | return result; |
| 85 | } |
| 86 | /* Alias for the deprecated name. */ |
| 87 | strong_alias (elf_getshdrnum, elf_getshnum) |