sysdeps/wordsize-32/symbol-hacks.h

   1 /* Hacks needed for symbol manipulation.
   2    Copyright (C) 2004-2016 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_next "symbol-hacks.h"
  20
  21 /* A very dirty trick: gcc emits references to __divdi3, __udivdi3,
  22    __moddi3, and __umoddi3.  These functions are exported and
  23    therefore we get PLTs.  Unnecessarily so.  Changing gcc is a big
  24    task which might not be worth it so we play tricks with the
  25    assembler.  */
  26 #if !defined __ASSEMBLER__ && !defined in_divdi3_c && IS_IN (libc) && defined SHARED
  27 asm ("__divdi3 = __divdi3_internal");
  28 asm ("__udivdi3 = __udivdi3_internal");
  29 asm ("__moddi3 = __moddi3_internal");
  30 asm ("__umoddi3 = __umoddi3_internal");
  31 #endif