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3020f72618
Instead of using a special ELF section along with a linker script directive to put the IO vtables within the RELRO section, the libio vtables are all moved to an array marked as data.relro (so linker will place in the RELRO segment without the need of extra directives). To avoid static linking namespace issues and including all vtable referenced objects, all required function pointers are set to weak alias. Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
42 lines
1.5 KiB
C
42 lines
1.5 KiB
C
/* Test for libio vtables and their validation. Enabled through interposition.
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Copyright (C) 2018-2023 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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<https://www.gnu.org/licenses/>. */
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#include "tst-vtables-common.c"
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/* Provide an interposed definition of the standard file handles with
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our own vtable. stdout/stdin/stderr will not work as a result, but
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a succesful test does not print anything, so this is fine. */
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#include "libioP.h"
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#undef _IO_file_jumps
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#define _IO_file_jumps jumps
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#undef _IO_wfile_jumps
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extern const struct _IO_jump_t _IO_wfile_jumps;
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#define _IO_wfile_jumps _IO_wfile_jumps
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#include "stdfiles.c"
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static int
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do_test (void)
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{
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return run_tests (false);
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}
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/* Calling setvbuf in the test driver is not supported with our
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interposed file handles. */
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#define TEST_NO_SETVBUF
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#include <support/test-driver.c>
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