glibc/elf/tst-libc_dlvsym-static.c
Florian Weimer 82eef55f8f elf: Support dlvsym within libc.so
This commit adds a new _dl_open_hook entry for dlvsym and implements the
function using the existing dl_lookup_symbol_x function supplied by the
dynamic loader.

A new hook variable, _dl_open_hook2, is introduced, which should make
this change suitable for backporting: For old statically linked
binaries, __libc_dlvsym will always return NULL.
2018-01-04 18:46:24 +01:00

33 lines
1.1 KiB
C

/* Compare dlvsym and __libc_dlvsym results. Static version.
Copyright (C) 2017 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 <support/xdlfcn.h>
static int
do_test (void)
{
void *handle = xdlopen ("tst-libc_dlvsym-dso.so", RTLD_LAZY);
void (*compare) (void) = xdlsym (handle, "compare_vsyms_global");
compare ();
xdlclose (handle);
return 0;
}
#include <support/test-driver.c>