sysdeps/aarch64/libc-tls.c

   1 /* Copyright (C) 2005-2023 Free Software Foundation, Inc.
   2
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <csu/libc-tls.c>
  20 #include <dl-tls.h>
  21
  22 /* On AArch64, linker optimizations are not required, so __tls_get_addr
  23    can be called even in statically linked binaries.  In this case module
  24    must be always 1 and PT_TLS segment exist in the binary, otherwise it
  25    would not link.  */
  26
  27 void *
  28 __tls_get_addr (tls_index *ti)
  29 {
  30   dtv_t *dtv = THREAD_DTV ();
  31   return (char *) dtv[1].pointer.val + ti->ti_offset;
  32 }