Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 1 | /* Get ELF header. |
| 2 | Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005 Red Hat, Inc. |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 3 | This file is part of Red Hat elfutils. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 4 | Written by Ulrich Drepper <drepper@redhat.com>, 1998. |
| 5 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 6 | Red Hat elfutils is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by the |
| 8 | Free Software Foundation; version 2 of the License. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 9 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 10 | Red Hat elfutils is distributed in the hope that it will be useful, but |
| 11 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | General Public License for more details. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 14 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 15 | You should have received a copy of the GNU General Public License along |
| 16 | with Red Hat elfutils; if not, write to the Free Software Foundation, |
Ulrich Drepper | 1e9ef50 | 2006-04-04 22:29:06 +0000 | [diff] [blame] | 17 | Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 18 | |
| 19 | In addition, as a special exception, Red Hat, Inc. gives You the |
| 20 | additional right to link the code of Red Hat elfutils with code licensed |
| 21 | under any Open Source Initiative certified open source license |
| 22 | (http://www.opensource.org/licenses/index.php) which requires the |
| 23 | distribution of source code with any binary distribution and to |
| 24 | distribute linked combinations of the two. Non-GPL Code permitted under |
| 25 | this exception must only link to the code of Red Hat elfutils through |
| 26 | those well defined interfaces identified in the file named EXCEPTION |
| 27 | found in the source code files (the "Approved Interfaces"). The files |
| 28 | of Non-GPL Code may instantiate templates or use macros or inline |
| 29 | functions from the Approved Interfaces without causing the resulting |
| 30 | work to be covered by the GNU General Public License. Only Red Hat, |
| 31 | Inc. may make changes or additions to the list of Approved Interfaces. |
| 32 | Red Hat's grant of this exception is conditioned upon your not adding |
| 33 | any new exceptions. If you wish to add a new Approved Interface or |
| 34 | exception, please contact Red Hat. You must obey the GNU General Public |
| 35 | License in all respects for all of the Red Hat elfutils code and other |
| 36 | code used in conjunction with Red Hat elfutils except the Non-GPL Code |
| 37 | covered by this exception. If you modify this file, you may extend this |
| 38 | exception to your version of the file, but you are not obligated to do |
| 39 | so. If you do not wish to provide this exception without modification, |
| 40 | you must delete this exception statement from your version and license |
| 41 | this file solely under the GPL without exception. |
| 42 | |
| 43 | Red Hat elfutils is an included package of the Open Invention Network. |
| 44 | An included package of the Open Invention Network is a package for which |
| 45 | Open Invention Network licensees cross-license their patents. No patent |
| 46 | license is granted, either expressly or impliedly, by designation as an |
| 47 | included package. Should you wish to participate in the Open Invention |
| 48 | Network licensing program, please visit www.openinventionnetwork.com |
| 49 | <http://www.openinventionnetwork.com>. */ |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 50 | |
| 51 | #ifdef HAVE_CONFIG_H |
| 52 | # include <config.h> |
| 53 | #endif |
| 54 | |
| 55 | #include <gelf.h> |
| 56 | #include <stddef.h> |
| 57 | #include <stdlib.h> |
| 58 | #include <string.h> |
| 59 | |
| 60 | #include "libelfP.h" |
| 61 | |
| 62 | |
| 63 | GElf_Ehdr * |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 64 | __gelf_getehdr_rdlock (elf, dest) |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 65 | Elf *elf; |
| 66 | GElf_Ehdr *dest; |
| 67 | { |
| 68 | GElf_Ehdr *result = NULL; |
| 69 | |
| 70 | if (elf == NULL) |
| 71 | return NULL; |
| 72 | |
| 73 | if (unlikely (elf->kind != ELF_K_ELF)) |
| 74 | { |
| 75 | __libelf_seterrno (ELF_E_INVALID_HANDLE); |
| 76 | return NULL; |
| 77 | } |
| 78 | |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 79 | /* The following is an optimization: the ehdr element is at the same |
| 80 | position in both the elf32 and elf64 structure. */ |
| 81 | if (offsetof (struct Elf, state.elf32.ehdr) |
| 82 | != offsetof (struct Elf, state.elf64.ehdr)) |
| 83 | abort (); |
| 84 | /* Just pick one of the values. */ |
| 85 | if (unlikely (elf->state.elf64.ehdr == NULL)) |
| 86 | /* Maybe no ELF header was created yet. */ |
| 87 | __libelf_seterrno (ELF_E_WRONG_ORDER_EHDR); |
| 88 | else if (elf->class == ELFCLASS32) |
| 89 | { |
| 90 | Elf32_Ehdr *ehdr = elf->state.elf32.ehdr; |
| 91 | |
| 92 | /* Convert the 32-bit struct to an 64-bit one. */ |
| 93 | memcpy (dest->e_ident, ehdr->e_ident, EI_NIDENT); |
| 94 | #define COPY(name) \ |
| 95 | dest->name = ehdr->name |
| 96 | COPY (e_type); |
| 97 | COPY (e_machine); |
| 98 | COPY (e_version); |
| 99 | COPY (e_entry); |
| 100 | COPY (e_phoff); |
| 101 | COPY (e_shoff); |
| 102 | COPY (e_flags); |
| 103 | COPY (e_ehsize); |
| 104 | COPY (e_phentsize); |
| 105 | COPY (e_phnum); |
| 106 | COPY (e_shentsize); |
| 107 | COPY (e_shnum); |
| 108 | COPY (e_shstrndx); |
| 109 | |
| 110 | result = dest; |
| 111 | } |
| 112 | else |
| 113 | result = memcpy (dest, elf->state.elf64.ehdr, sizeof (*dest)); |
| 114 | |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 115 | return result; |
| 116 | } |
Ulrich Drepper | d56e232 | 2008-08-16 03:09:13 +0000 | [diff] [blame] | 117 | |
| 118 | GElf_Ehdr * |
| 119 | gelf_getehdr (elf, dest) |
| 120 | Elf *elf; |
| 121 | GElf_Ehdr *dest; |
| 122 | { |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 123 | GElf_Ehdr *result; |
Ulrich Drepper | d56e232 | 2008-08-16 03:09:13 +0000 | [diff] [blame] | 124 | if (elf == NULL) |
| 125 | return NULL; |
| 126 | |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 127 | rwlock_rdlock (elf->lock); |
| 128 | result = __gelf_getehdr_rdlock (elf, dest); |
| 129 | rwlock_unlock (elf->lock); |
| 130 | |
| 131 | return result; |
Ulrich Drepper | d56e232 | 2008-08-16 03:09:13 +0000 | [diff] [blame] | 132 | } |