elf/tst-alignmod2.c

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