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/* Return section header.
   Copyright (C) 1998, 1999, 2000, 2002 Red Hat, Inc.
   Written by Ulrich Drepper <drepper@redhat.com>, 1998.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation.

   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 <string.h>

#include "libelfP.h"


GElf_Shdr *
gelf_getshdr (Elf_Scn *scn, GElf_Shdr *dst)
{
  GElf_Shdr *result = NULL;

  if (scn == NULL)
    return NULL;

  if (dst == NULL)
    {
      __libelf_seterrno (ELF_E_INVALID_OPERAND);
      return NULL;
    }

  rwlock_rdlock (scn->elf->lock);

  if (scn->elf->class == ELFCLASS32)
    {
      /* Copy the elements one-by-one.  */
      Elf32_Shdr *shdr = scn->shdr.e32 ? scn->shdr.e32 : INTUSE(elf32_getshdr) (scn);

      if (shdr == NULL)
	{
	  __libelf_seterrno (ELF_E_INVALID_OPERAND);
	  goto out;
	}

#define COPY(name) \
      dst->name = shdr->name
      COPY (sh_name);
      COPY (sh_type);
      COPY (sh_flags);
      COPY (sh_addr);
      COPY (sh_offset);
      COPY (sh_size);
      COPY (sh_link);
      COPY (sh_info);
      COPY (sh_addralign);
      COPY (sh_entsize);

      result = dst;
    }
  else
    {
      Elf64_Shdr *shdr = scn->shdr.e64 ? scn->shdr.e64 : INTUSE(elf64_getshdr) (scn);

      if (shdr == NULL)
	{
	  __libelf_seterrno (ELF_E_INVALID_OPERAND);
	  goto out;
	}

      /* We only have to copy the data.  */
      result = memcpy (dst, shdr, sizeof (GElf_Shdr));
    }

 out:
  rwlock_unlock (scn->elf->lock);

  return result;
}
INTDEF(gelf_getshdr)