glibc/elf/tst-p_alignmod-base.c
H.J. Lu b5237c0746 elf: Add a test for PT_LOAD segments with mixed p_align [BZ #28676]
Add tst-p_alignmod1-edit to edit the copy of tst-p_alignmod-base.so to
reduce p_align of the first PT_LOAD segment by half and verify that the
shared library is mapped with the maximum p_align of all PT_LOAD segments.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-01-24 06:37:15 -08:00

42 lines
1.3 KiB
C

/* Check alignment of PT_LOAD segment in a shared library.
Copyright (C) 2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include <support/check.h>
#include <tst-file-align.h>
#include "tst-p_align.h"
int foo __attribute__ ((aligned (ALIGN))) = 1;
bool
__attribute__ ((weak, noclone, noinline))
is_aligned_p (void *p, int align)
{
return (((uintptr_t) p) & (align - 1)) == 0;
}
int
do_load_test (void)
{
printf ("foo: %p\n", &foo);
TEST_VERIFY (is_aligned_p (&foo, ALIGN));
return 0;
}