2024-12-19 21:31:05 +00:00
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/* Miscellaneous definitions for both glibc build and test.
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2025-01-01 18:14:45 +00:00
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Copyright (C) 2024-2025 Free Software Foundation, Inc.
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2024-12-19 21:31:05 +00:00
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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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#ifndef _INCLUDE_MISC_H
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#define _INCLUDE_MISC_H
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#include <config.h>
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/* Add the compiler optimization to inhibit loop transformation to library
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calls. This is used to avoid recursive calls in memset and memmove
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default implementations in tests. */
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#ifdef HAVE_CC_INHIBIT_LOOP_TO_LIBCALL
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# define inhibit_loop_to_libcall \
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__attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
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#else
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# define inhibit_loop_to_libcall
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#endif
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#ifdef HAVE_TEST_CC_INHIBIT_LOOP_TO_LIBCALL
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# define test_cc_inhibit_loop_to_libcall \
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__attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
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#else
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# define test_cc_inhibit_loop_to_libcall
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#endif
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/* Used to disable stack protection in sensitive places, like ifunc
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resolvers and early static TLS init. */
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#ifdef __clang__
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# define cc_inhibit_stack_protector \
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__attribute__((no_stack_protector))
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#else
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# define cc_inhibit_stack_protector \
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__attribute__ ((__optimize__ ("-fno-stack-protector")))
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#endif
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#if IS_IN (testsuite) || IS_IN (testsuite_internal)
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# ifdef HAVE_TEST_CC_NO_STACK_PROTECTOR
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# define test_inhibit_stack_protector cc_inhibit_stack_protector
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# define inhibit_stack_protector cc_inhibit_stack_protector
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# else
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# define test_inhibit_stack_protector
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# define inhibit_stack_protector
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# endif
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#else
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# ifdef HAVE_CC_NO_STACK_PROTECTOR
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# define inhibit_stack_protector cc_inhibit_stack_protector
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# else
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Fix build without stack protector [BZ #32494]
Without stack protector, inhibit_stack_protector is undefined during build:
In file included from <command-line>:
./../include/libc-symbols.h:665:3: error: expected ';' before '__typeof'
665 | __typeof (type_name) *name##_ifunc (__VA_ARGS__)
\
| ^~~~~~~~
./../include/libc-symbols.h:676:3: note: in expansion of macro
'__ifunc_resolver'
676 | __ifunc_resolver (type_name, name, expr, init, static, __VA_ARGS__)
| ^~~~~~~~~~~~~~~~
./../include/libc-symbols.h:703:3: note: in expansion of macro '__ifunc_args'
703 | __ifunc_args (type_name, name, expr, init, arg)
| ^~~~~~~~~~~~
./../include/libc-symbols.h:790:3: note: in expansion of macro '__ifunc'
790 | __ifunc (redirected_name, name, expr, void, INIT_ARCH)
| ^~~~~~~
../sysdeps/x86_64/multiarch/memchr.c:29:1: note: in expansion of macro
'libc_ifunc_redirected'
29 | libc_ifunc_redirected (__redirect_memchr, memchr, IFUNC_SELECTOR ());
| ^~~~~~~~~~~~~~~~~~~~~
1. Fix a typo in include/libc-symbols.h to define inhibit_stack_protector
for build.
2. Don't include <config.h> in include/libc-symbols.h since it has been
included in include/libc-misc.h.
3. Change #include "libc-misc.h" to #include <libc-misc.h> in
string/test-string.h.
This fixes BZ #32494.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>
2024-12-22 19:58:54 +00:00
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# define inhibit_stack_protector
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2024-12-19 21:31:05 +00:00
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# endif
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#endif
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#endif
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