108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
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/* Update information in dynamic table at the given index.
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Copyright (C) 2000, 2001, 2002, 2005, 2009, 2014, 2015 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 2000.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <gelf.h>
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#include <string.h>
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#include "libelfP.h"
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int
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gelf_update_dyn (Elf_Data *data, int ndx, GElf_Dyn *src)
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{
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Elf_Data_Scn *data_scn = (Elf_Data_Scn *) data;
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Elf_Scn *scn;
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int result = 0;
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if (data == NULL)
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return 0;
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if (unlikely (data_scn->d.d_type != ELF_T_DYN))
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{
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/* The type of the data better should match. */
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__libelf_seterrno (ELF_E_DATA_MISMATCH);
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return 0;
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}
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scn = data_scn->s;
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rwlock_wrlock (scn->elf->lock);
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if (scn->elf->class == ELFCLASS32)
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{
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Elf32_Dyn *dyn;
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/* There is the possibility that the values in the input are
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too large. */
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if (unlikely (src->d_tag < -0x80000000ll)
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|| unlikely (src->d_tag > 0x7fffffffll)
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|| unlikely (src->d_un.d_val > 0xffffffffull))
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{
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__libelf_seterrno (ELF_E_INVALID_DATA);
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goto out;
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}
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/* Check whether we have to resize the data buffer. */
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if (INVALID_NDX (ndx, Elf32_Dyn, &data_scn->d))
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{
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__libelf_seterrno (ELF_E_INVALID_INDEX);
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goto out;
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}
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dyn = &((Elf32_Dyn *) data_scn->d.d_buf)[ndx];
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dyn->d_tag = src->d_tag;
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dyn->d_un.d_val = src->d_un.d_val;
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}
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else
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{
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/* Check whether we have to resize the data buffer. */
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if (INVALID_NDX (ndx, Elf64_Dyn, &data_scn->d))
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{
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__libelf_seterrno (ELF_E_INVALID_INDEX);
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goto out;
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}
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((Elf64_Dyn *) data_scn->d.d_buf)[ndx] = *src;
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}
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result = 1;
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/* Mark the section as modified. */
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scn->flags |= ELF_F_DIRTY;
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out:
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rwlock_unlock (scn->elf->lock);
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return result;
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}
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