libelf/elf_flagshdr.c

/* Manipulate ELF section header flags.
   Copyright (C) 1999, 2000, 2001, 2002 Red Hat, Inc.
   This file is part of Red Hat elfutils.
   Written by Ulrich Drepper <drepper@redhat.com>, 1999.

   Red Hat elfutils 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 of the License.

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   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.

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   with Red Hat elfutils; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.

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   Red Hat elfutils is an included package of the Open Invention Network.
   An included package of the Open Invention Network is a package for which
   Open Invention Network licensees cross-license their patents.  No patent
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <libelf.h>
#include <stddef.h>

#include "libelfP.h"


unsigned int
elf_flagshdr (scn, cmd, flags)
     Elf_Scn *scn;
     Elf_Cmd cmd;
     unsigned int flags;
{
  unsigned int result;

  if (scn == NULL)
    return 0;

  if (unlikely (scn->elf->kind != ELF_K_ELF))
    {
      __libelf_seterrno (ELF_E_INVALID_HANDLE);
      return 0;
    }

  if (likely (cmd == ELF_C_SET))
    result = (scn->shdr_flags |= (flags & ELF_F_DIRTY));
  else if (likely (cmd == ELF_C_CLR))
    result = (scn->shdr_flags &= ~(flags & ELF_F_DIRTY));
  else
    {
      __libelf_seterrno (ELF_E_INVALID_COMMAND);
      return 0;
    }

  return result;
}