elf/tst-alignmod.c

   1 /* Copyright (C) 2003-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <stdio.h>
  19 #include <tst-stack-align.h>
  20
  21 static int res, *resp;
  22
  23 static void __attribute__((constructor))
  24 con (void)
  25 {
  26   res = TEST_STACK_ALIGN () ? -1 : 1;
  27 }
  28
  29 void
  30 in_dso (int *result)
  31 {
  32   if (!res)
  33     {
  34       puts ("constructor has not been run");
  35       *result = 1;
  36     }
  37   else if (res != 1)
  38     {
  39       puts ("constructor has been run without sufficient alignment");
  40       *result = 1;
  41     }
  42
  43   resp = result;
  44 }
  45
  46 static void __attribute__((destructor))
  47 des (void)
  48 {
  49   if (TEST_STACK_ALIGN ())
  50     *resp = 1;
  51 }