/* Thread-local storage descriptor handling in the ELF dynamic linker.

   x86_64 version.

   Copyright (C) 2005-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <stdint.h>

#ifndef _X86_64_DL_TLSDESC_H

# define _X86_64_DL_TLSDESC_H 1

/* Type used to represent a TLS descriptor in the GOT.  */

struct tlsdesc

{

  /* Anonymous union is used here to ensure that GOT entry slot is always

     8 bytes for both x32 and x86-64.  */

  union

    {

      ptrdiff_t (*entry) (struct tlsdesc *on_rax);

      uint64_t entry_slot;

    };

  union

    {

      void *arg;

      uint64_t arg_slot;

    };

};

typedef struct dl_tls_index

{

  uint64_t ti_module;

  uint64_t ti_offset;

} tls_index;

/* Type used as the argument in a TLS descriptor for a symbol that

   needs dynamic TLS offsets.  */

struct tlsdesc_dynamic_arg

{

  tls_index tlsinfo;

  size_t gen_count;

};

extern ptrdiff_t attribute_hidden

  _dl_tlsdesc_return(struct tlsdesc *on_rax),

  _dl_tlsdesc_undefweak(struct tlsdesc *on_rax),

  _dl_tlsdesc_resolve_rela(struct tlsdesc *on_rax),

  _dl_tlsdesc_resolve_hold(struct tlsdesc *on_rax);

# ifdef SHARED

extern void *_dl_make_tlsdesc_dynamic (struct link_map *map,

				       size_t ti_offset)

  attribute_hidden;

extern ptrdiff_t attribute_hidden _dl_tlsdesc_dynamic(struct tlsdesc *);

# endif

#endif