163 lines
4.0 KiB
C
163 lines
4.0 KiB
C
/*-
|
|
* Copyright (c) 2006,2008 Joseph Koshy
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
|
|
#include <assert.h>
|
|
#include <gelf.h>
|
|
#include <limits.h>
|
|
|
|
#include "_libelf.h"
|
|
|
|
ELFTC_VCSID("$Id: gelf_rela.c 2272 2011-12-03 17:07:31Z jkoshy $");
|
|
|
|
GElf_Rela *
|
|
gelf_getrela(Elf_Data *ed, int ndx, GElf_Rela *dst)
|
|
{
|
|
int ec;
|
|
Elf *e;
|
|
size_t msz;
|
|
Elf_Scn *scn;
|
|
uint32_t sh_type;
|
|
Elf32_Rela *rela32;
|
|
Elf64_Rela *rela64;
|
|
struct _Libelf_Data *d;
|
|
|
|
d = (struct _Libelf_Data *) ed;
|
|
|
|
if (d == NULL || ndx < 0 || dst == NULL ||
|
|
(scn = d->d_scn) == NULL ||
|
|
(e = scn->s_elf) == NULL) {
|
|
LIBELF_SET_ERROR(ARGUMENT, 0);
|
|
return (NULL);
|
|
}
|
|
|
|
ec = e->e_class;
|
|
assert(ec == ELFCLASS32 || ec == ELFCLASS64);
|
|
|
|
if (ec == ELFCLASS32)
|
|
sh_type = scn->s_shdr.s_shdr32.sh_type;
|
|
else
|
|
sh_type = scn->s_shdr.s_shdr64.sh_type;
|
|
|
|
if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
|
|
LIBELF_SET_ERROR(ARGUMENT, 0);
|
|
return (NULL);
|
|
}
|
|
|
|
msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);
|
|
|
|
assert(msz > 0);
|
|
|
|
if (msz * ndx >= d->d_data.d_size) {
|
|
LIBELF_SET_ERROR(ARGUMENT, 0);
|
|
return (NULL);
|
|
}
|
|
|
|
if (ec == ELFCLASS32) {
|
|
rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;
|
|
|
|
dst->r_offset = (Elf64_Addr) rela32->r_offset;
|
|
dst->r_info = ELF64_R_INFO(
|
|
(Elf64_Xword) ELF32_R_SYM(rela32->r_info),
|
|
ELF32_R_TYPE(rela32->r_info));
|
|
dst->r_addend = (Elf64_Sxword) rela32->r_addend;
|
|
|
|
} else {
|
|
|
|
rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;
|
|
|
|
*dst = *rela64;
|
|
}
|
|
|
|
return (dst);
|
|
}
|
|
|
|
int
|
|
gelf_update_rela(Elf_Data *ed, int ndx, GElf_Rela *dr)
|
|
{
|
|
int ec;
|
|
Elf *e;
|
|
size_t msz;
|
|
Elf_Scn *scn;
|
|
uint32_t sh_type;
|
|
Elf32_Rela *rela32;
|
|
Elf64_Rela *rela64;
|
|
struct _Libelf_Data *d;
|
|
|
|
d = (struct _Libelf_Data *) ed;
|
|
|
|
if (d == NULL || ndx < 0 || dr == NULL ||
|
|
(scn = d->d_scn) == NULL ||
|
|
(e = scn->s_elf) == NULL) {
|
|
LIBELF_SET_ERROR(ARGUMENT, 0);
|
|
return (0);
|
|
}
|
|
|
|
ec = e->e_class;
|
|
assert(ec == ELFCLASS32 || ec == ELFCLASS64);
|
|
|
|
if (ec == ELFCLASS32)
|
|
sh_type = scn->s_shdr.s_shdr32.sh_type;
|
|
else
|
|
sh_type = scn->s_shdr.s_shdr64.sh_type;
|
|
|
|
if (_libelf_xlate_shtype(sh_type) != ELF_T_RELA) {
|
|
LIBELF_SET_ERROR(ARGUMENT, 0);
|
|
return (0);
|
|
}
|
|
|
|
msz = _libelf_msize(ELF_T_RELA, ec, e->e_version);
|
|
assert(msz > 0);
|
|
|
|
if (msz * ndx >= d->d_data.d_size) {
|
|
LIBELF_SET_ERROR(ARGUMENT, 0);
|
|
return (0);
|
|
}
|
|
|
|
if (ec == ELFCLASS32) {
|
|
rela32 = (Elf32_Rela *) d->d_data.d_buf + ndx;
|
|
|
|
LIBELF_COPY_U32(rela32, dr, r_offset);
|
|
|
|
if (ELF64_R_SYM(dr->r_info) > ELF32_R_SYM(~0UL) ||
|
|
ELF64_R_TYPE(dr->r_info) > ELF32_R_TYPE(~0U)) {
|
|
LIBELF_SET_ERROR(RANGE, 0);
|
|
return (0);
|
|
}
|
|
rela32->r_info = ELF32_R_INFO(ELF64_R_SYM(dr->r_info),
|
|
ELF64_R_TYPE(dr->r_info));
|
|
|
|
LIBELF_COPY_S32(rela32, dr, r_addend);
|
|
} else {
|
|
rela64 = (Elf64_Rela *) d->d_data.d_buf + ndx;
|
|
|
|
*rela64 = *dr;
|
|
}
|
|
|
|
return (1);
|
|
}
|