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a7e4cdca PB |
1 | // Control various target specific ABI tweaks. ARM version. |
2 | ||
7adcbafe | 3 | // Copyright (C) 2004-2022 Free Software Foundation, Inc. |
a7e4cdca PB |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
a7e4cdca PB |
9 | // any later version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
748086b7 JJ |
16 | // Under Section 7 of GPL version 3, you are granted additional |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
a7e4cdca | 24 | |
7c3e9502 BK |
25 | /** @file bits/cxxabi_tweaks.h |
26 | * This is an internal header file, included by other library headers. | |
27 | * Do not attempt to use it directly. @headername{cxxabi.h} | |
143c27b0 BK |
28 | */ |
29 | ||
a7e4cdca PB |
30 | #ifndef _CXXABI_TWEAKS_H |
31 | #define _CXXABI_TWEAKS_H 1 | |
32 | ||
33 | #ifdef __cplusplus | |
34 | namespace __cxxabiv1 | |
35 | { | |
f92ab29f | 36 | extern "C" |
3c6430a3 | 37 | { |
a7e4cdca PB |
38 | #endif |
39 | ||
40 | #ifdef __ARM_EABI__ | |
d4794d1a | 41 | // The ARM EABI uses the least significant bit of a 32-bit |
d1ac0f0d | 42 | // guard variable. |
445cf5eb JM |
43 | #define _GLIBCXX_GUARD_TEST(x) ((*(x) & 1) != 0) |
44 | #define _GLIBCXX_GUARD_SET(x) *(x) = 1 | |
0f3e711e JJ |
45 | #define _GLIBCXX_GUARD_BIT 1 |
46 | #define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1) | |
47 | #define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1) | |
a7e4cdca PB |
48 | typedef int __guard; |
49 | ||
d1ac0f0d | 50 | #define _GLIBCXX_GUARD_TEST_AND_ACQUIRE(x) \ |
026ca112 | 51 | ((__atomic_load_n(x, __ATOMIC_ACQUIRE) & 1) != 0) |
d1ac0f0d JW |
52 | #define _GLIBCXX_GUARD_SET_AND_RELEASE(x) \ |
53 | __atomic_store_n(x, 1, __ATOMIC_RELEASE) | |
54 | ||
a7e4cdca PB |
55 | // We also want the element size in array cookies. |
56 | #define _GLIBCXX_ELTSIZE_IN_COOKIE 1 | |
f92ab29f | 57 | |
47bedfb0 PB |
58 | // __cxa_vec_ctor should return a pointer to the array. |
59 | typedef void * __cxa_vec_ctor_return_type; | |
60 | #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x | |
511bbc8f MM |
61 | // Constructors and destructors return the "this" pointer. |
62 | typedef void * __cxa_cdtor_return_type; | |
47bedfb0 PB |
63 | |
64 | #else // __ARM_EABI__ | |
65 | ||
a7e4cdca | 66 | // The generic ABI uses the first byte of a 64-bit guard variable. |
445cf5eb JM |
67 | #define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0) |
68 | #define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1 | |
0f3e711e JJ |
69 | #define _GLIBCXX_GUARD_BIT __guard_test_bit (0, 1) |
70 | #define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1) | |
71 | #define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1) | |
a7e4cdca | 72 | __extension__ typedef int __guard __attribute__((mode (__DI__))); |
47bedfb0 PB |
73 | |
74 | // __cxa_vec_ctor has void return type. | |
75 | typedef void __cxa_vec_ctor_return_type; | |
76 | #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return | |
511bbc8f MM |
77 | // Constructors and destructors do not return a value. |
78 | typedef void __cxa_cdtor_return_type; | |
47bedfb0 PB |
79 | |
80 | #endif //!__ARM_EABI__ | |
a7e4cdca PB |
81 | |
82 | #ifdef __cplusplus | |
3c6430a3 | 83 | } |
a7e4cdca PB |
84 | } // namespace __cxxabiv1 |
85 | #endif | |
86 | ||
f92ab29f | 87 | #endif |