mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-11 13:50:06 +00:00
18363b4f01
GCC 10.0 enabled -fno-common by default and this started to point that __cache_line_size had been implemented in 2 different places: loader and libc. In order to avoid this duplication, the libc variable has been removed and the loader variable is moved to rtld_global_ro. File sysdeps/unix/sysv/linux/powerpc/dl-auxv.h has been added in order to reuse code for both static and dynamic linking scenarios. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/* Test if an executable can read from rtld_global_ro._dl_cache_line_size.
|
|
Copyright (C) 2020 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 <stdint.h>
|
|
#include <inttypes.h>
|
|
#include <sys/auxv.h>
|
|
#include <ldsodefs.h>
|
|
#include <errno.h>
|
|
|
|
/* errnop is required in order to work around BZ #20802. */
|
|
int
|
|
test_cache (int *errnop)
|
|
{
|
|
int cls1 = GLRO (dl_cache_line_size);
|
|
errno = *errnop;
|
|
uint64_t cls2 = getauxval (AT_DCACHEBSIZE);
|
|
*errnop = errno;
|
|
|
|
printf ("AT_DCACHEBSIZE = %" PRIu64 " B\n", cls2);
|
|
printf ("_dl_cache_line_size = %d B\n", cls1);
|
|
|
|
if (cls1 != cls2)
|
|
{
|
|
printf ("error: _dl_cache_line_size != AT_DCACHEBSIZE\n");
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|