blob: c59c6dd44afc14c58675eda4e875a65cc79e4b72 [file] [log] [blame]
/* Update REL relocation information at given index.
Copyright (C) 2000, 2001, 2002 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 2000.
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 <gelf.h>
#include <stdlib.h>
#include "libelfP.h"
int
gelf_update_rel (Elf_Data *dst, int ndx, GElf_Rel *src)
{
Elf_Data_Scn *data_scn = (Elf_Data_Scn *) dst;
Elf_Scn *scn;
int result = 0;
if (dst == NULL)
return 0;
if (unlikely (ndx < 0))
{
__libelf_seterrno (ELF_E_INVALID_INDEX);
return 0;
}
if (unlikely (data_scn->d.d_type != ELF_T_REL))
{
/* The type of the data better should match. */
__libelf_seterrno (ELF_E_DATA_MISMATCH);
return 0;
}
scn = data_scn->s;
rwlock_wrlock (scn->elf->lock);
if (scn->elf->class == ELFCLASS32)
{
Elf32_Rel *rel;
/* There is the possibility that the values in the input are
too large. */
if (unlikely (src->r_offset > 0xffffffffull)
|| unlikely (GELF_R_SYM (src->r_info) > 0xffffff)
|| unlikely (GELF_R_TYPE (src->r_info) > 0xff))
{
__libelf_seterrno (ELF_E_INVALID_DATA);
goto out;
}
/* Check whether we have to resize the data buffer. */
if (unlikely ((ndx + 1) * sizeof (Elf32_Rel) > data_scn->d.d_size))
{
__libelf_seterrno (ELF_E_INVALID_INDEX);
goto out;
}
rel = &((Elf32_Rel *) data_scn->d.d_buf)[ndx];
rel->r_offset = src->r_offset;
rel->r_info = ELF32_R_INFO (GELF_R_SYM (src->r_info),
GELF_R_TYPE (src->r_info));
}
else
{
/* Check whether we have to resize the data buffer. */
if (unlikely ((ndx + 1) * sizeof (Elf64_Rel) > data_scn->d.d_size))
{
__libelf_seterrno (ELF_E_INVALID_INDEX);
goto out;
}
((Elf64_Rel *) data_scn->d.d_buf)[ndx] = *src;
}
result = 1;
/* Mark the section as modified. */
scn->flags |= ELF_F_DIRTY;
out:
rwlock_unlock (scn->elf->lock);
return result;
}