elf/tst-alignmod2.c

   1 /* Copyright (C) 2003-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
   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 <stdbool.h>
  20 #include <stdio.h>
  21 #include <tst-stack-align.h>
  22 #include <unistd.h>
  23
  24 static int res, *fdp;
  25 static bool *test_destructorsp;
  26
  27 static void __attribute__((constructor))
  28 con (void)
  29 {
  30   res = TEST_STACK_ALIGN () ? -1 : 1;
  31 }
  32
  33 void
  34 in_dso (int *result, bool *test_destructors, int *fd)
  35 {
  36   if (!res)
  37     {
  38       puts ("constructor has not been run");
  39       *result = 1;
  40     }
  41   else if (res != 1)
  42     {
  43       puts ("constructor has been run without sufficient alignment");
  44       *result = 1;
  45     }
  46
  47   test_destructorsp = test_destructors;
  48   fdp = fd;
  49 }
  50
  51 static void __attribute__((destructor))
  52 des (void)
  53 {
  54   if (!test_destructorsp || !*test_destructorsp)
  55     return;
  56
  57   char c = TEST_STACK_ALIGN () ? 'D' : 'C';
  58   write (*fdp, &c, 1);
  59 }