mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-30 14:31:14 +00:00
77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
/* GLRO(dl_pagesize) initialization DSO test with a static executable.
|
|
Copyright (C) 2013-2014 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <dlfcn.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
/* Check that the same page size is reported both directly and by a DSO
|
|
mapped from a static executable.
|
|
|
|
On targets that support different page sizes, the kernel communicates
|
|
the size currently in use via the auxiliary vector. This vector is
|
|
available to initial startup, but not any DSOs loaded later on. As
|
|
static executables do not export their symbols a DSO cannot access
|
|
the value obtained by initial startup and the value therefore has to
|
|
be passed on to the DSO and stored within its data area explicitly.
|
|
This is performed by a call to DL_STATIC_INIT that is defined in a
|
|
target-dependent way, and that on variable page size targets stores
|
|
it in the GLRO(dl_pagesize) variable of the DSO's dynamic linker. */
|
|
static int
|
|
do_test (void)
|
|
{
|
|
int pagesize = getpagesize ();
|
|
int (*my_getpagesize) (void);
|
|
int my_pagesize;
|
|
void *handle;
|
|
|
|
/* Try to map a module. */
|
|
handle = dlopen ("modstatic5.so", RTLD_LAZY | RTLD_LOCAL);
|
|
if (handle == NULL)
|
|
{
|
|
printf ("dlopen (modstatic5.so): %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
/* Get at its symbol. */
|
|
my_getpagesize = dlsym (handle, "my_getpagesize");
|
|
if (my_getpagesize == NULL)
|
|
{
|
|
printf ("dlsym (my_getpagesize): %s\n", dlerror ());
|
|
return 1;
|
|
}
|
|
|
|
/* Make sure the page size reported is the same either way. */
|
|
my_pagesize = my_getpagesize ();
|
|
if (my_pagesize != pagesize)
|
|
{
|
|
printf ("my_getpagesize: got %i, expected %i\n", my_pagesize, pagesize);
|
|
return 1;
|
|
}
|
|
|
|
/* All done, clean up. */
|
|
my_getpagesize = NULL;
|
|
dlclose (handle);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|