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      1 /* This file is automatically generated.  DO NOT EDIT! */
      2 /* Generated from: NetBSD: mknative-gcc,v 1.117 2023/07/31 01:48:37 mrg Exp  */
      3 /* Generated from: NetBSD: mknative.common,v 1.16 2018/04/15 15:13:37 christos Exp  */
      4 
      5 // Control various target specific ABI tweaks.  ARM version.
      6 
      7 // Copyright (C) 2004-2022 Free Software Foundation, Inc.
      8 //
      9 // This file is part of the GNU ISO C++ Library.  This library is free
     10 // software; you can redistribute it and/or modify it under the
     11 // terms of the GNU General Public License as published by the
     12 // Free Software Foundation; either version 3, or (at your option)
     13 // any later version.
     14 
     15 // This library is distributed in the hope that it will be useful,
     16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
     17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     18 // GNU General Public License for more details.
     19 
     20 // Under Section 7 of GPL version 3, you are granted additional
     21 // permissions described in the GCC Runtime Library Exception, version
     22 // 3.1, as published by the Free Software Foundation.
     23 
     24 // You should have received a copy of the GNU General Public License and
     25 // a copy of the GCC Runtime Library Exception along with this program;
     26 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     27 // <http://www.gnu.org/licenses/>.
     28 
     29 /** @file bits/cxxabi_tweaks.h
     30  *  This is an internal header file, included by other library headers.
     31  *  Do not attempt to use it directly. @headername{cxxabi.h}
     32  */
     33 
     34 #ifndef _CXXABI_TWEAKS_H
     35 #define _CXXABI_TWEAKS_H 1
     36 
     37 #ifdef __cplusplus
     38 namespace __cxxabiv1
     39 {
     40   extern "C"
     41   {
     42 #endif
     43 
     44 #ifdef __ARM_EABI__
     45   // The ARM EABI uses the least significant bit of a 32-bit
     46   // guard variable.
     47 #define _GLIBCXX_GUARD_TEST(x) ((*(x) & 1) != 0)
     48 #define _GLIBCXX_GUARD_SET(x) *(x) = 1
     49 #define _GLIBCXX_GUARD_BIT 1
     50 #define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
     51 #define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
     52   typedef int __guard;
     53 
     54 #define _GLIBCXX_GUARD_TEST_AND_ACQUIRE(x) \
     55   ((__atomic_load_n(x, __ATOMIC_ACQUIRE) & 1) != 0)
     56 #define _GLIBCXX_GUARD_SET_AND_RELEASE(x) \
     57   __atomic_store_n(x, 1, __ATOMIC_RELEASE)
     58 
     59   // We also want the element size in array cookies.
     60 #define _GLIBCXX_ELTSIZE_IN_COOKIE 1
     61 
     62   // __cxa_vec_ctor should return a pointer to the array.
     63   typedef void * __cxa_vec_ctor_return_type;
     64 #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x
     65   // Constructors and destructors return the "this" pointer.
     66   typedef void * __cxa_cdtor_return_type;
     67 
     68 #else // __ARM_EABI__
     69 
     70   // The generic ABI uses the first byte of a 64-bit guard variable.
     71 #define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0)
     72 #define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1
     73 #define _GLIBCXX_GUARD_BIT __guard_test_bit (0, 1)
     74 #define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
     75 #define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
     76   __extension__ typedef int __guard __attribute__((mode (__DI__)));
     77 
     78   // __cxa_vec_ctor has void return type.
     79   typedef void __cxa_vec_ctor_return_type;
     80 #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return
     81   // Constructors and destructors do not return a value.
     82   typedef void __cxa_cdtor_return_type;
     83 
     84 #endif //!__ARM_EABI__
     85 
     86 #ifdef __cplusplus
     87   }
     88 } // namespace __cxxabiv1
     89 #endif
     90 
     91 #endif
     92