sysdeps/powerpc/libc-tls.c


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/* Thread-local storage handling in the ELF dynamic linker.  PowerPC version.
   Copyright (C) 2015-2017 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 <csu/libc-tls.c>
#include <dl-tls.h>

/* On powerpc, the linker usually optimizes code sequences used to access
   Thread Local Storage.  However, when the user disables these optimizations
   by passing --no-tls-optimze to the linker, we need to provide __tls_get_addr
   in static libc in order to avoid undefined references to that symbol.  */

void *
__tls_get_addr (tls_index *ti)
{
  dtv_t *dtv = THREAD_DTV ();
  return (char *) dtv[1].pointer.val + ti->ti_offset + TLS_DTV_OFFSET;
}