Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 1 | /* Get next section. |
| 2 | Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 3 | This file is part of elfutils. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 4 | Contributed by Ulrich Drepper <drepper@redhat.com>, 1998. |
| 5 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 6 | This file is free software; you can redistribute it and/or modify |
| 7 | it under the terms of either |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 8 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 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 |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 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. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 25 | |
Mark Wielaard | de2ed97 | 2012-06-05 17:15:16 +0200 | [diff] [blame] | 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/>. */ |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 29 | |
| 30 | #ifdef HAVE_CONFIG_H |
| 31 | # include <config.h> |
| 32 | #endif |
| 33 | |
| 34 | #include <assert.h> |
| 35 | #include <libelf.h> |
| 36 | #include <stddef.h> |
| 37 | |
| 38 | #include "libelfP.h" |
| 39 | |
| 40 | |
| 41 | Elf_Scn * |
| 42 | elf_nextscn (elf, scn) |
| 43 | Elf *elf; |
| 44 | Elf_Scn *scn; |
| 45 | { |
| 46 | Elf_Scn *result = NULL; |
| 47 | |
| 48 | if (elf == NULL) |
| 49 | return NULL; |
| 50 | |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 51 | rwlock_rdlock (elf->lock); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 52 | |
| 53 | if (scn == NULL) |
| 54 | { |
| 55 | /* If no section handle is given return the first (not 0th) section. */ |
| 56 | if (elf->class == ELFCLASS32 |
| 57 | || (offsetof (Elf, state.elf32.scns) |
| 58 | == offsetof (Elf, state.elf64.scns))) |
| 59 | { |
| 60 | if (elf->state.elf32.scns.cnt > 1) |
| 61 | result = &elf->state.elf32.scns.data[1]; |
| 62 | } |
| 63 | else |
| 64 | { |
| 65 | if (elf->state.elf64.scns.cnt > 1) |
| 66 | result = &elf->state.elf64.scns.data[1]; |
| 67 | } |
| 68 | } |
| 69 | else |
| 70 | { |
| 71 | Elf_ScnList *list = scn->list; |
| 72 | |
| 73 | if (scn + 1 < &list->data[list->cnt]) |
| 74 | result = scn + 1; |
| 75 | else if (scn + 1 == &list->data[list->max] |
| 76 | && (list = list->next) != NULL) |
| 77 | { |
| 78 | /* If there is another element in the section list it must |
| 79 | have at least one entry. */ |
| 80 | assert (list->cnt > 0); |
| 81 | result = &list->data[0]; |
| 82 | } |
| 83 | } |
| 84 | |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 85 | rwlock_unlock (elf->lock); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 86 | |
| 87 | return result; |
| 88 | } |
| 89 | INTDEF(elf_nextscn) |