125b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Get additional required symbol version information at the given offset. 225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Copyright (C) 1999, 2000, 2001, 2002 Red Hat, Inc. 303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes This file is part of elfutils. 425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Written by Ulrich Drepper <drepper@redhat.com>, 1999. 525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes This file is free software; you can redistribute it and/or modify 703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes it under the terms of either 825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes * the GNU Lesser General Public License as published by the Free 1003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Software Foundation; either version 3 of the License, or (at 1103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes your option) any later version 1203333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1303333823c75a1c1887e923828113a1b0fd12020cElliott Hughes or 1403333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1503333823c75a1c1887e923828113a1b0fd12020cElliott Hughes * the GNU General Public License as published by the Free 1603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes Software Foundation; either version 2 of the License, or (at 1703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes your option) any later version 1803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 1903333823c75a1c1887e923828113a1b0fd12020cElliott Hughes or both in parallel, as here. 2003333823c75a1c1887e923828113a1b0fd12020cElliott Hughes 2103333823c75a1c1887e923828113a1b0fd12020cElliott Hughes elfutils is distributed in the hope that it will be useful, but 2225b3c049e70834cf33790a28643ab058b507b35cBen Cheng WITHOUT ANY WARRANTY; without even the implied warranty of 2325b3c049e70834cf33790a28643ab058b507b35cBen Cheng MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 2425b3c049e70834cf33790a28643ab058b507b35cBen Cheng General Public License for more details. 2525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 2603333823c75a1c1887e923828113a1b0fd12020cElliott Hughes You should have received copies of the GNU General Public License and 2703333823c75a1c1887e923828113a1b0fd12020cElliott Hughes the GNU Lesser General Public License along with this program. If 2803333823c75a1c1887e923828113a1b0fd12020cElliott Hughes not, see <http://www.gnu.org/licenses/>. */ 2925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3025b3c049e70834cf33790a28643ab058b507b35cBen Cheng#ifdef HAVE_CONFIG_H 3125b3c049e70834cf33790a28643ab058b507b35cBen Cheng# include <config.h> 3225b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 3325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3425b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <assert.h> 3525b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <gelf.h> 3625b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <string.h> 3725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 3825b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include "libelfP.h" 3925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4125b3c049e70834cf33790a28643ab058b507b35cBen ChengGElf_Vernaux * 4225b3c049e70834cf33790a28643ab058b507b35cBen Chenggelf_getvernaux (data, offset, dst) 4325b3c049e70834cf33790a28643ab058b507b35cBen Cheng Elf_Data *data; 4425b3c049e70834cf33790a28643ab058b507b35cBen Cheng int offset; 4525b3c049e70834cf33790a28643ab058b507b35cBen Cheng GElf_Vernaux *dst; 4625b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 4725b3c049e70834cf33790a28643ab058b507b35cBen Cheng GElf_Vernaux *result; 4825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (data == NULL) 5025b3c049e70834cf33790a28643ab058b507b35cBen Cheng return NULL; 5125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely (data->d_type != ELF_T_VNEED)) 5325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 5425b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libelf_seterrno (ELF_E_INVALID_HANDLE); 5525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return NULL; 5625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 5725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* It's easy to handle this type. It has the same size for 32 and 5925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 64 bit objects. And fortunately the `ElfXXX_Vernaux' records 6025b3c049e70834cf33790a28643ab058b507b35cBen Cheng also have the same size. */ 6125b3c049e70834cf33790a28643ab058b507b35cBen Cheng assert (sizeof (GElf_Vernaux) == sizeof (Elf32_Verneed)); 6225b3c049e70834cf33790a28643ab058b507b35cBen Cheng assert (sizeof (GElf_Vernaux) == sizeof (Elf64_Verneed)); 6325b3c049e70834cf33790a28643ab058b507b35cBen Cheng assert (sizeof (GElf_Vernaux) == sizeof (Elf32_Vernaux)); 6425b3c049e70834cf33790a28643ab058b507b35cBen Cheng assert (sizeof (GElf_Vernaux) == sizeof (Elf64_Vernaux)); 6525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6625b3c049e70834cf33790a28643ab058b507b35cBen Cheng rwlock_rdlock (((Elf_Data_Scn *) data)->s->elf->lock); 6725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* The data is already in the correct form. Just make sure the 6925b3c049e70834cf33790a28643ab058b507b35cBen Cheng index is OK. */ 7025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely (offset < 0) 7125b3c049e70834cf33790a28643ab058b507b35cBen Cheng || unlikely (offset + sizeof (GElf_Vernaux) > data->d_size) 7225b3c049e70834cf33790a28643ab058b507b35cBen Cheng || unlikely (offset % sizeof (GElf_Vernaux) != 0)) 7325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 7425b3c049e70834cf33790a28643ab058b507b35cBen Cheng __libelf_seterrno (ELF_E_OFFSET_RANGE); 7525b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = NULL; 7625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 7725b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 7825b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = (GElf_Vernaux *) memcpy (dst, (char *) data->d_buf + offset, 7925b3c049e70834cf33790a28643ab058b507b35cBen Cheng sizeof (GElf_Verneed)); 8025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 8125b3c049e70834cf33790a28643ab058b507b35cBen Cheng rwlock_unlock (((Elf_Data_Scn *) data)->s->elf->lock); 8225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 8325b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 8425b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 85