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/* Get ELF header.
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2005, 2015 Red Hat, Inc.
This file is part of elfutils.
Written by Ulrich Drepper <drepper@redhat.com>, 1998.
This file is free software; you can redistribute it and/or modify
it under the terms of either
* the GNU Lesser General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at
your option) any later version
or
* the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at
your option) any later version
or both in parallel, as here.
elfutils 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 copies of the GNU General Public License and
the GNU Lesser General Public License along with this program. If
not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gelf.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "libelfP.h"
GElf_Ehdr *
internal_function
__gelf_getehdr_rdlock (Elf *elf, GElf_Ehdr *dest)
{
GElf_Ehdr *result = NULL;
if (elf == NULL)
return NULL;
if (unlikely (elf->kind != ELF_K_ELF))
{
__libelf_seterrno (ELF_E_INVALID_HANDLE);
return NULL;
}
/* The following is an optimization: the ehdr element is at the same
position in both the elf32 and elf64 structure. */
if (offsetof (struct Elf, state.elf32.ehdr)
!= offsetof (struct Elf, state.elf64.ehdr))
abort ();
/* Just pick one of the values. */
if (unlikely (elf->state.elf64.ehdr == NULL))
/* Maybe no ELF header was created yet. */
__libelf_seterrno (ELF_E_WRONG_ORDER_EHDR);
else if (elf->class == ELFCLASS32)
{
Elf32_Ehdr *ehdr = elf->state.elf32.ehdr;
/* Convert the 32-bit struct to an 64-bit one. */
memcpy (dest->e_ident, ehdr->e_ident, EI_NIDENT);
#define COPY(name) \
dest->name = ehdr->name
COPY (e_type);
COPY (e_machine);
COPY (e_version);
COPY (e_entry);
COPY (e_phoff);
COPY (e_shoff);
COPY (e_flags);
COPY (e_ehsize);
COPY (e_phentsize);
COPY (e_phnum);
COPY (e_shentsize);
COPY (e_shnum);
COPY (e_shstrndx);
result = dest;
}
else
result = memcpy (dest, elf->state.elf64.ehdr, sizeof (*dest));
return result;
}
GElf_Ehdr *
gelf_getehdr (Elf *elf, GElf_Ehdr *dest)
{
GElf_Ehdr *result;
if (elf == NULL)
return NULL;
rwlock_rdlock (elf->lock);
result = __gelf_getehdr_rdlock (elf, dest);
rwlock_unlock (elf->lock);
return result;
}
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