| /* Get required symbol version information at the given offset. |
| Copyright (C) 1999, 2000, 2001, 2002 Red Hat, Inc. |
| Written by Ulrich Drepper <drepper@redhat.com>, 1999. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation, version 2. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software Foundation, |
| Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include <assert.h> |
| #include <gelf.h> |
| #include <string.h> |
| |
| #include "libelfP.h" |
| |
| |
| GElf_Verneed * |
| gelf_getverneed (data, offset, dst) |
| Elf_Data *data; |
| int offset; |
| GElf_Verneed *dst; |
| { |
| GElf_Verneed *result; |
| |
| if (data == NULL) |
| return NULL; |
| |
| if (unlikely (data->d_type != ELF_T_VNEED)) |
| { |
| __libelf_seterrno (ELF_E_INVALID_HANDLE); |
| return NULL; |
| } |
| |
| /* It's easy to handle this type. It has the same size for 32 and |
| 64 bit objects. And fortunately the `ElfXXX_Vernaux' records |
| also have the same size. */ |
| assert (sizeof (GElf_Verneed) == sizeof (Elf32_Verneed)); |
| assert (sizeof (GElf_Verneed) == sizeof (Elf64_Verneed)); |
| assert (sizeof (GElf_Verneed) == sizeof (Elf32_Vernaux)); |
| assert (sizeof (GElf_Verneed) == sizeof (Elf64_Vernaux)); |
| |
| rwlock_rdlock (((Elf_Data_Scn *) data)->s->elf->lock); |
| |
| /* The data is already in the correct form. Just make sure the |
| index is OK. */ |
| if (unlikely (offset < 0) |
| || unlikely (offset + sizeof (GElf_Verneed) > data->d_size) |
| || unlikely (offset % sizeof (GElf_Verneed) != 0)) |
| { |
| __libelf_seterrno (ELF_E_OFFSET_RANGE); |
| result = NULL; |
| } |
| else |
| result = (GElf_Verneed *) memcpy (dst, (char *) data->d_buf + offset, |
| sizeof (GElf_Verneed)); |
| |
| rwlock_unlock (((Elf_Data_Scn *) data)->s->elf->lock); |
| |
| return result; |
| } |