elf/tst-p_alignmod-base.c

   1 /* Check alignment of PT_LOAD segment in a shared library.
   2    Copyright (C) 2022 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 <stdio.h>
  20 #include <stdbool.h>
  21 #include <stdint.h>
  22 #include <support/check.h>
  23 #include <tst-file-align.h>
  24 #include "tst-p_align.h"
  25
  26 int foo __attribute__ ((aligned (ALIGN))) = 1;
  27
  28 bool
  29 __attribute__ ((weak, noclone, noinline))
  30 is_aligned_p (void *p, int align)
  31 {
  32   return (((uintptr_t) p) & (align - 1)) == 0;
  33 }
  34
  35 int
  36 do_load_test (void)
  37 {
  38   printf ("foo: %p\n", &foo);
  39   TEST_VERIFY (is_aligned_p (&foo, ALIGN));
  40   return 0;
  41 }