sysdeps/powerpc/libc-tls.c

   1 /* Thread-local storage handling in the ELF dynamic linker.  PowerPC version.
   2    Copyright (C) 2015-2017 Free Software Foundation, Inc.
   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
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <csu/libc-tls.c>
  20 #include <dl-tls.h>
  21
  22 /* On powerpc, the linker usually optimizes code sequences used to access
  23    Thread Local Storage.  However, when the user disables these optimizations
  24    by passing --no-tls-optimze to the linker, we need to provide __tls_get_addr
  25    in static libc in order to avoid undefined references to that symbol.  */
  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 + TLS_DTV_OFFSET;
  32 }