/* $NetBSD: gelf_syminfo.c,v 1.5 2024/03/03 17:37:34 christos Exp $ */

/* $NetBSD: gelf_syminfo.c,v 1.5 2024/03/03 17:37:34 christos Exp $ */

/*-
* 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.
*/

#if HAVE_NBTOOL_CONFIG_H
# include "nbtool_config.h"
#endif

#include <sys/cdefs.h>

#include <assert.h>
#include <gelf.h>

#include "_libelf.h"

__RCSID("$NetBSD: gelf_syminfo.c,v 1.5 2024/03/03 17:37:34 christos Exp $");
ELFTC_VCSID("Id: gelf_syminfo.c 3977 2022-05-01 06:45:34Z jkoshy");

GElf_Syminfo *
gelf_getsyminfo(Elf_Data *ed, int ndx, GElf_Syminfo *dst)
{
int ec;
Elf *e;
size_t msz;
Elf_Scn *scn;
uint32_t sh_type;
struct _Libelf_Data *d;
Elf32_Syminfo *syminfo32;
Elf64_Syminfo *syminfo64;

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_SYMINFO) {
LIBELF_SET_ERROR(ARGUMENT, 0);
return (NULL);
}

if ((msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version)) == 0)
return (NULL);

assert(ndx >= 0);

if (msz * (size_t) ndx >= d->d_data.d_size) {
LIBELF_SET_ERROR(ARGUMENT, 0);
return (NULL);
}

if (ec == ELFCLASS32) {

syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx;

dst->si_boundto = syminfo32->si_boundto;
dst->si_flags = syminfo32->si_flags;

} else {

syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx;

*dst = *syminfo64;
}

return (dst);
}

int
gelf_update_syminfo(Elf_Data *ed, int ndx, GElf_Syminfo *gs)
{
int ec;
Elf *e;
size_t msz;
Elf_Scn *scn;
uint32_t sh_type;
struct _Libelf_Data *d;
Elf32_Syminfo *syminfo32;
Elf64_Syminfo *syminfo64;

d = (struct _Libelf_Data *) ed;

if (d == NULL || ndx < 0 || gs == 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_SYMINFO) {
LIBELF_SET_ERROR(ARGUMENT, 0);
return (0);
}

if ((msz = _libelf_msize(ELF_T_SYMINFO, ec, e->e_version)) == 0)
return (0);

assert(ndx >= 0);

if (msz * (size_t) ndx >= d->d_data.d_size) {
LIBELF_SET_ERROR(ARGUMENT, 0);
return (0);
}

if (ec == ELFCLASS32) {
syminfo32 = (Elf32_Syminfo *) d->d_data.d_buf + ndx;

syminfo32->si_boundto = gs->si_boundto;
syminfo32->si_flags = gs->si_flags;

} else {
syminfo64 = (Elf64_Syminfo *) d->d_data.d_buf + ndx;

*syminfo64 = *gs;
}

return (1);
}