Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 1 | /* Read all of the file associated with the descriptor. |
Roland McGrath | 0c6db7e | 2009-11-10 13:34:09 -0800 | [diff] [blame] | 2 | Copyright (C) 1998-2009 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 | Contributed 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 | |
Ulrich Drepper | fbe998a | 2005-08-29 16:27:10 +0000 | [diff] [blame] | 55 | #include <errno.h> |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 56 | #include <unistd.h> |
Roland McGrath | 0c6db7e | 2009-11-10 13:34:09 -0800 | [diff] [blame] | 57 | #include <sys/stat.h> |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 58 | |
Ulrich Drepper | fbe998a | 2005-08-29 16:27:10 +0000 | [diff] [blame] | 59 | #include <system.h> |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 60 | #include "libelfP.h" |
| 61 | #include "common.h" |
| 62 | |
| 63 | |
| 64 | static void |
| 65 | set_address (Elf *elf, size_t offset) |
| 66 | { |
| 67 | if (elf->kind == ELF_K_AR) |
| 68 | { |
| 69 | Elf *child = elf->state.ar.children; |
| 70 | |
| 71 | while (child != NULL) |
| 72 | { |
| 73 | if (child->map_address == NULL) |
| 74 | { |
| 75 | child->map_address = elf->map_address; |
| 76 | child->start_offset -= offset; |
| 77 | if (child->kind == ELF_K_AR) |
| 78 | child->state.ar.offset -= offset; |
| 79 | |
| 80 | set_address (child, offset); |
| 81 | } |
| 82 | |
| 83 | child = child->next; |
| 84 | } |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | |
| 89 | char * |
| 90 | __libelf_readall (elf) |
| 91 | Elf *elf; |
| 92 | { |
| 93 | /* Get the file. */ |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 94 | rwlock_wrlock (elf->lock); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 95 | |
| 96 | if (elf->map_address == NULL && unlikely (elf->fildes == -1)) |
| 97 | { |
| 98 | __libelf_seterrno (ELF_E_INVALID_HANDLE); |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 99 | rwlock_unlock (elf->lock); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 100 | return NULL; |
| 101 | } |
| 102 | |
| 103 | /* If the file is not mmap'ed and not previously loaded, do it now. */ |
| 104 | if (elf->map_address == NULL) |
| 105 | { |
Roland McGrath | 0c6db7e | 2009-11-10 13:34:09 -0800 | [diff] [blame] | 106 | char *mem = NULL; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 107 | |
| 108 | /* If this is an archive and we have derived descriptors get the |
| 109 | locks for all of them. */ |
| 110 | libelf_acquire_all (elf); |
| 111 | |
Roland McGrath | 0c6db7e | 2009-11-10 13:34:09 -0800 | [diff] [blame] | 112 | if (elf->maximum_size == ~((size_t) 0)) |
| 113 | { |
| 114 | /* We don't yet know how large the file is. Determine that now. */ |
| 115 | struct stat st; |
| 116 | |
| 117 | if (fstat (elf->fildes, &st) < 0) |
| 118 | goto read_error; |
| 119 | |
| 120 | if (sizeof (size_t) >= sizeof (st.st_size) |
| 121 | || st.st_size <= ~((size_t) 0)) |
| 122 | elf->maximum_size = (size_t) st.st_size; |
| 123 | else |
| 124 | { |
| 125 | errno = EOVERFLOW; |
| 126 | goto read_error; |
| 127 | } |
| 128 | } |
| 129 | |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 130 | /* Allocate all the memory we need. */ |
| 131 | mem = (char *) malloc (elf->maximum_size); |
| 132 | if (mem != NULL) |
| 133 | { |
| 134 | /* Read the file content. */ |
Ulrich Drepper | fbe998a | 2005-08-29 16:27:10 +0000 | [diff] [blame] | 135 | if (unlikely ((size_t) pread_retry (elf->fildes, mem, |
| 136 | elf->maximum_size, |
| 137 | elf->start_offset) |
| 138 | != elf->maximum_size)) |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 139 | { |
| 140 | /* Something went wrong. */ |
Roland McGrath | 0c6db7e | 2009-11-10 13:34:09 -0800 | [diff] [blame] | 141 | read_error: |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 142 | __libelf_seterrno (ELF_E_READ_ERROR); |
| 143 | free (mem); |
| 144 | } |
| 145 | else |
| 146 | { |
| 147 | /* Remember the address. */ |
| 148 | elf->map_address = mem; |
| 149 | |
| 150 | /* Also remember that we allocated the memory. */ |
| 151 | elf->flags |= ELF_F_MALLOCED; |
| 152 | |
| 153 | /* Propagate the information down to all children and |
| 154 | their children. */ |
| 155 | set_address (elf, elf->start_offset); |
| 156 | |
| 157 | /* Correct the own offsets. */ |
| 158 | if (elf->kind == ELF_K_AR) |
| 159 | elf->state.ar.offset -= elf->start_offset; |
| 160 | elf->start_offset = 0; |
| 161 | } |
| 162 | } |
| 163 | else |
| 164 | __libelf_seterrno (ELF_E_NOMEM); |
| 165 | |
| 166 | /* Free the locks on the children. */ |
| 167 | libelf_release_all (elf); |
| 168 | } |
| 169 | |
Roland McGrath | b4d6f0f | 2008-08-25 22:55:17 +0000 | [diff] [blame] | 170 | rwlock_unlock (elf->lock); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 171 | |
| 172 | return (char *) elf->map_address; |
| 173 | } |