sysdeps/x86_64/dl-tlsdesc.h

/* Thread-local storage descriptor handling in the ELF dynamic linker.
   x86_64 version.
   Copyright (C) 2005, 2008 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifndef _X86_64_DL_TLSDESC_H
# define _X86_64_DL_TLSDESC_H 1

/* Use this to access DT_TLSDESC_PLT and DT_TLSDESC_GOT.  */
#ifndef ADDRIDX
# define ADDRIDX(tag) (DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM \
		       + DT_EXTRANUM + DT_VALNUM + DT_ADDRTAGIDX (tag))
#endif

/* Type used to represent a TLS descriptor in the GOT.  */
struct tlsdesc
{
  ptrdiff_t (*entry)(struct tlsdesc *on_rax);
  void *arg;
};

typedef struct dl_tls_index
{
  unsigned long int ti_module;
  unsigned long int 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 *internal_function _dl_make_tlsdesc_dynamic (struct link_map *map,
							 size_t ti_offset);

extern ptrdiff_t attribute_hidden _dl_tlsdesc_dynamic(struct tlsdesc *);
# endif

#endif