sysdeps/x86/tst-stack-align.h

   1 /* Check stack alignment.  X86 version.
   2    Copyright (C) 2021-2023 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 typedef struct { int i[16]; } int_al16 __attribute__((aligned (16)));
  20
  21 #define TEST_STACK_ALIGN_INIT() \
  22   ({                                                            \
  23     int_al16 _m;                                                \
  24     printf ("int_al16:  %p %zu\n", &_m, __alignof (int_al16));  \
  25     is_aligned (&_m, __alignof (int_al16));                     \
  26    })
  27
  28 #include_next <tst-stack-align.h>