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82eef55f8f
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.
33 lines
1.1 KiB
C
33 lines
1.1 KiB
C
/* Compare dlvsym and __libc_dlvsym results. Static version.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <support/xdlfcn.h>
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static int
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do_test (void)
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{
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void *handle = xdlopen ("tst-libc_dlvsym-dso.so", RTLD_LAZY);
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void (*compare) (void) = xdlsym (handle, "compare_vsyms_global");
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compare ();
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xdlclose (handle);
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return 0;
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}
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#include <support/test-driver.c>
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