sysdeps/x86_64/ifuncmod8.c

   1 /* Test IFUNC selector with floating-point parameters.
   2    Copyright (C) 2015-2020 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <emmintrin.h>
  20
  21 void * foo_ifunc (void) __asm__ ("foo");
  22 __asm__(".type foo, %gnu_indirect_function");
  23
  24 static float
  25 foo_impl (float x)
  26 {
  27   return x + 1;
  28 }
  29
  30 void *
  31 inhibit_stack_protector
  32 foo_ifunc (void)
  33 {
  34   __m128i xmm = _mm_set1_epi32 (-1);
  35   asm volatile ("movdqa %0, %%xmm0" : : "x" (xmm) : "xmm0" );
  36   return foo_impl;
  37 }