1// Control various target specific ABI tweaks. ARM version. 2 3// Copyright (C) 2004, 2006, 2008, 2009, 2011 Free Software Foundation, Inc. 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 8// Free Software Foundation; either version 3, or (at your option) 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 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/>. 24 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} 28 */ 29 30#ifndef _CXXABI_TWEAKS_H 31#define _CXXABI_TWEAKS_H 1 32 33#ifdef __cplusplus 34namespace __cxxabiv1 35{ 36 extern "C" 37 { 38#endif 39 40#ifdef __ARM_EABI__ 41 // The ARM EABI uses the least significant bit of a 32-bit 42 // guard variable. */ 43#define _GLIBCXX_GUARD_TEST(x) ((*(x) & 1) != 0) 44#define _GLIBCXX_GUARD_SET(x) *(x) = 1 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) 48 typedef int __guard; 49 50 // We also want the element size in array cookies. 51#define _GLIBCXX_ELTSIZE_IN_COOKIE 1 52 53 // __cxa_vec_ctor should return a pointer to the array. 54 typedef void * __cxa_vec_ctor_return_type; 55#define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x 56 // Constructors and destructors return the "this" pointer. 57 typedef void * __cxa_cdtor_return_type; 58 59#else // __ARM_EABI__ 60 61 // The generic ABI uses the first byte of a 64-bit guard variable. 62#define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0) 63#define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1 64#define _GLIBCXX_GUARD_BIT __guard_test_bit (0, 1) 65#define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1) 66#define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1) 67 __extension__ typedef int __guard __attribute__((mode (__DI__))); 68 69 // __cxa_vec_ctor has void return type. 70 typedef void __cxa_vec_ctor_return_type; 71#define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return 72 // Constructors and destructors do not return a value. 73 typedef void __cxa_cdtor_return_type; 74 75#endif //!__ARM_EABI__ 76 77#ifdef __cplusplus 78 } 79} // namespace __cxxabiv1 80#endif 81 82#endif 83