1/* Miscellaneous definitions for both glibc build and test.
 2   Copyright (C) 2024-2025 Free Software Foundation, Inc.
 3   This file is part of the GNU C Library.
 4
 5   The GNU C Library is free software; you can redistribute it and/or
 6   modify it under the terms of the GNU Lesser General Public
 7   License as published by the Free Software Foundation; either
 8   version 2.1 of the License, or (at your option) any later version.
 9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, see
17   <https://www.gnu.org/licenses/>.  */
18
19#ifndef _INCLUDE_MISC_H
20#define _INCLUDE_MISC_H
21
22#include <config.h>
23
24/* Add the compiler optimization to inhibit loop transformation to library
25   calls.  This is used to avoid recursive calls in memset and memmove
26   default implementations in tests.  */
27#ifdef HAVE_CC_INHIBIT_LOOP_TO_LIBCALL
28# define inhibit_loop_to_libcall \
29    __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
30#else
31# define inhibit_loop_to_libcall
32#endif
33
34#ifdef HAVE_TEST_CC_INHIBIT_LOOP_TO_LIBCALL
35# define test_cc_inhibit_loop_to_libcall \
36    __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns")))
37#else
38# define test_cc_inhibit_loop_to_libcall
39#endif
40
41/* Used to disable stack protection in sensitive places, like ifunc
42   resolvers and early static TLS init.  */
43#ifdef __clang__
44# define cc_inhibit_stack_protector \
45    __attribute__((no_stack_protector))
46#else
47# define cc_inhibit_stack_protector \
48   __attribute__ ((__optimize__ ("-fno-stack-protector")))
49#endif
50
51#if IS_IN (testsuite) || IS_IN (testsuite_internal)
52# ifdef HAVE_TEST_CC_NO_STACK_PROTECTOR
53#  define test_inhibit_stack_protector cc_inhibit_stack_protector
54#  define inhibit_stack_protector cc_inhibit_stack_protector
55# else
56#  define test_inhibit_stack_protector
57#  define inhibit_stack_protector
58# endif
59#else
60# ifdef HAVE_CC_NO_STACK_PROTECTOR
61#  define inhibit_stack_protector cc_inhibit_stack_protector
62# else
63#  define inhibit_stack_protector
64# endif
65#endif
66
67#endif