1b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper/* Update information in dynamic table at the given index. 21ccdfb683ad6c7e59793136c3a657ddf131cafd1Mark Wielaard Copyright (C) 2000, 2001, 2002, 2005, 2009, 2014, 2015 Red Hat, Inc. 3de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard This file is part of elfutils. 4b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper Written by Ulrich Drepper <drepper@redhat.com>, 2000. 5b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 6de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard This file is free software; you can redistribute it and/or modify 7de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard it under the terms of either 8b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 9de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard * the GNU Lesser General Public License as published by the Free 10de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard Software Foundation; either version 3 of the License, or (at 11de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard your option) any later version 12de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 13de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard or 14de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 15de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard * the GNU General Public License as published by the Free 16de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard Software Foundation; either version 2 of the License, or (at 17de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard your option) any later version 18de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 19de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard or both in parallel, as here. 20de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard 21de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard elfutils is distributed in the hope that it will be useful, but 22361df7da6dfecd817b27e62b91752ac316d7cdd4Ulrich Drepper WITHOUT ANY WARRANTY; without even the implied warranty of 23361df7da6dfecd817b27e62b91752ac316d7cdd4Ulrich Drepper MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 24361df7da6dfecd817b27e62b91752ac316d7cdd4Ulrich Drepper General Public License for more details. 25b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 26de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard You should have received copies of the GNU General Public License and 27de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard the GNU Lesser General Public License along with this program. If 28de2ed97f33139af5c7a0811e4ec66fc896a13cf2Mark Wielaard not, see <http://www.gnu.org/licenses/>. */ 29b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 30b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#ifdef HAVE_CONFIG_H 31b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper# include <config.h> 32b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#endif 33b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 34b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <gelf.h> 35b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include <string.h> 36b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 37b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper#include "libelfP.h" 38b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 39b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 40b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepperint 411ccdfb683ad6c7e59793136c3a657ddf131cafd1Mark Wielaardgelf_update_dyn (Elf_Data *data, int ndx, GElf_Dyn *src) 42b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper{ 43b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data; 44b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper Elf_Scn *scn; 45b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper int result = 0; 46b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 47b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (data == NULL) 48b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return 0; 49b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 50b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (unlikely (data_scn->d.d_type != ELF_T_DYN)) 51b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 52b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* The type of the data better should match. */ 53b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper __libelf_seterrno (ELF_E_DATA_MISMATCH); 54b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return 0; 55b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 56b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 57b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper scn = data_scn->s; 58b4d6f0f8064f2b706ea9035ef0393d8299671390Roland McGrath rwlock_wrlock (scn->elf->lock); 59b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 60b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (scn->elf->class == ELFCLASS32) 61b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 62b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper Elf32_Dyn *dyn; 63b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 64b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* There is the possibility that the values in the input are 65b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper too large. */ 66b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper if (unlikely (src->d_tag < -0x80000000ll) 67b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper || unlikely (src->d_tag > 0x7fffffffll) 68b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper || unlikely (src->d_un.d_val > 0xffffffffull)) 69b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 70b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper __libelf_seterrno (ELF_E_INVALID_DATA); 71b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper goto out; 72b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 73b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 74b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Check whether we have to resize the data buffer. */ 75a9039623c272f458a53f09009c2a0e1d6e60491dJakub Jelinek if (INVALID_NDX (ndx, Elf32_Dyn, &data_scn->d)) 76b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 77b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper __libelf_seterrno (ELF_E_INVALID_INDEX); 78b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper goto out; 79b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 80b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 81b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper dyn = &((Elf32_Dyn *) data_scn->d.d_buf)[ndx]; 82b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 83b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper dyn->d_tag = src->d_tag; 84b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper dyn->d_un.d_val = src->d_un.d_val; 85b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 86b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper else 87b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 88b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Check whether we have to resize the data buffer. */ 89a9039623c272f458a53f09009c2a0e1d6e60491dJakub Jelinek if (INVALID_NDX (ndx, Elf64_Dyn, &data_scn->d)) 90b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper { 91b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper __libelf_seterrno (ELF_E_INVALID_INDEX); 92b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper goto out; 93b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 94b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 95b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper ((Elf64_Dyn *) data_scn->d.d_buf)[ndx] = *src; 96b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper } 97b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 98b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper result = 1; 99b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 100b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper /* Mark the section as modified. */ 101b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper scn->flags |= ELF_F_DIRTY; 102b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 103b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper out: 104b4d6f0f8064f2b706ea9035ef0393d8299671390Roland McGrath rwlock_unlock (scn->elf->lock); 105b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper 106b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper return result; 107b08d5a8fb42f4586d756068065186b5af7e48daUlrich Drepper} 108