Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 1 | /* Update program header program header table entry. |
Roland McGrath | 6fd3cd1 | 2010-01-07 19:41:04 -0800 | [diff] [blame] | 2 | Copyright (C) 2000-2010 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>, 2000. |
| 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 <string.h> |
| 57 | |
| 58 | #include "libelfP.h" |
| 59 | |
| 60 | |
| 61 | int |
| 62 | gelf_update_phdr (Elf *elf, int ndx, GElf_Phdr *src) |
| 63 | { |
| 64 | int result = 0; |
| 65 | |
| 66 | if (elf == NULL) |
| 67 | return 0; |
| 68 | |
| 69 | if (unlikely (elf->kind != ELF_K_ELF)) |
| 70 | { |
| 71 | __libelf_seterrno (ELF_E_INVALID_HANDLE); |
| 72 | return 0; |
| 73 | } |
| 74 | |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 75 | rwlock_wrlock (elf->lock); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 76 | |
| 77 | if (elf->class == ELFCLASS32) |
| 78 | { |
| 79 | Elf32_Phdr *phdr = elf->state.elf32.phdr; |
| 80 | |
| 81 | /* We have to convert the data to the 32 bit format. This might |
| 82 | overflow some fields so we have to test for this case before |
| 83 | copying. */ |
| 84 | if (unlikely (src->p_offset > 0xffffffffull) |
| 85 | || unlikely (src->p_vaddr > 0xffffffffull) |
| 86 | || unlikely (src->p_paddr > 0xffffffffull) |
| 87 | || unlikely (src->p_filesz > 0xffffffffull) |
| 88 | || unlikely (src->p_memsz > 0xffffffffull) |
| 89 | || unlikely (src->p_align > 0xffffffffull)) |
| 90 | { |
| 91 | __libelf_seterrno (ELF_E_INVALID_DATA); |
| 92 | goto out; |
| 93 | } |
| 94 | |
| 95 | if (phdr == NULL) |
| 96 | { |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 97 | phdr = __elf32_getphdr_wrlock (elf); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 98 | if (phdr == NULL) |
| 99 | /* The error number is already set. */ |
| 100 | goto out; |
| 101 | } |
| 102 | |
| 103 | /* Test whether the index is ok. */ |
Roland McGrath | 6fd3cd1 | 2010-01-07 19:41:04 -0800 | [diff] [blame] | 104 | size_t phnum; |
| 105 | if (ndx >= elf->state.elf32.ehdr->e_phnum |
| 106 | && (elf->state.elf32.ehdr->e_phnum != PN_XNUM |
| 107 | || __elf_getphdrnum_rdlock (elf, &phnum) != 0 |
| 108 | || (size_t) ndx >= phnum)) |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 109 | { |
| 110 | __libelf_seterrno (ELF_E_INVALID_INDEX); |
| 111 | goto out; |
| 112 | } |
| 113 | |
| 114 | /* Now correct the pointer to point to the correct element. */ |
| 115 | phdr += ndx; |
| 116 | |
| 117 | #define COPY(name) \ |
| 118 | phdr->name = src->name |
| 119 | COPY (p_type); |
| 120 | COPY (p_offset); |
| 121 | COPY (p_vaddr); |
| 122 | COPY (p_paddr); |
| 123 | COPY (p_filesz); |
| 124 | COPY (p_memsz); |
| 125 | COPY (p_flags); |
| 126 | COPY (p_align); |
| 127 | } |
| 128 | else |
| 129 | { |
| 130 | Elf64_Phdr *phdr = elf->state.elf64.phdr; |
| 131 | |
| 132 | if (phdr == NULL) |
| 133 | { |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 134 | phdr = __elf64_getphdr_wrlock (elf); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 135 | if (phdr == NULL) |
| 136 | /* The error number is already set. */ |
| 137 | goto out; |
| 138 | } |
| 139 | |
| 140 | /* Test whether the index is ok. */ |
Roland McGrath | 6fd3cd1 | 2010-01-07 19:41:04 -0800 | [diff] [blame] | 141 | size_t phnum; |
| 142 | if (ndx >= elf->state.elf64.ehdr->e_phnum |
| 143 | && (elf->state.elf64.ehdr->e_phnum != PN_XNUM |
| 144 | || __elf_getphdrnum_rdlock (elf, &phnum) != 0 |
| 145 | || (size_t) ndx >= phnum)) |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 146 | { |
| 147 | __libelf_seterrno (ELF_E_INVALID_INDEX); |
| 148 | goto out; |
| 149 | } |
| 150 | |
| 151 | /* Just copy the data. */ |
| 152 | memcpy (phdr + ndx, src, sizeof (Elf64_Phdr)); |
| 153 | } |
| 154 | |
| 155 | result = 1; |
| 156 | |
| 157 | out: |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 158 | rwlock_unlock (elf->lock); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 159 | |
| 160 | return result; |
| 161 | } |