/* Thread-local storage handling in the ELF dynamic linker.  x86-64 version.

   Copyright (C) 2017-2018 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/>.  */

#ifdef SHARED

/* Work around GCC PR58066, due to which __tls_get_addr may be called

   with an unaligned stack.  The compat implementation is in

   tls_get_addr-compat.S.  */

# include <dl-tls.h>

/* Define __tls_get_addr within elf/dl-tls.c under a different

   name.  */

extern __typeof__ (__tls_get_addr) ___tls_get_addr;

# define __tls_get_addr ___tls_get_addr

# include <elf/dl-tls.c>

# undef __tls_get_addr

hidden_ver (___tls_get_addr, __tls_get_addr)

/* Only handle slow paths for __tls_get_addr.  */

attribute_hidden

void *

__tls_get_addr_slow (GET_ADDR_ARGS)

{

  dtv_t *dtv = THREAD_DTV ();

  if (__glibc_unlikely (dtv[0].counter != GL(dl_tls_generation)))

    return update_get_addr (GET_ADDR_PARAM);

  return tls_get_addr_tail (GET_ADDR_PARAM, dtv, NULL);

}

#else

/* No compatibility symbol needed.  */

# include <elf/dl-tls.c>

#endif