103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/* Update REL relocation information at given index.
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Copyright (C) 2000, 2001, 2002 Red Hat, Inc.
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Written by Ulrich Drepper <drepper@redhat.com>, 2000.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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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 <stdlib.h>
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#include "libelfP.h"
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int
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gelf_update_rel (Elf_Data *dst, int ndx, GElf_Rel *src)
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{
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Elf_Data_Scn *data_scn = (Elf_Data_Scn *) dst;
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Elf_Scn *scn;
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int result = 0;
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if (dst == NULL)
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return 0;
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if (unlikely (ndx < 0))
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{
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__libelf_seterrno (ELF_E_INVALID_INDEX);
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return 0;
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}
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if (unlikely (data_scn->d.d_type != ELF_T_REL))
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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_Rel *rel;
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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->r_offset > 0xffffffffull)
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|| unlikely (GELF_R_SYM (src->r_info) > 0xffffff)
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|| unlikely (GELF_R_TYPE (src->r_info) > 0xff))
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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 (unlikely ((ndx + 1) * sizeof (Elf32_Rel) > data_scn->d.d_size))
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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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rel = &((Elf32_Rel *) data_scn->d.d_buf)[ndx];
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rel->r_offset = src->r_offset;
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rel->r_info = ELF32_R_INFO (GELF_R_SYM (src->r_info),
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GELF_R_TYPE (src->r_info));
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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 (unlikely ((ndx + 1) * sizeof (Elf64_Rel) > data_scn->d.d_size))
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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_Rel *) 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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