cxxabi_tweaks.h revision 169691
1// Control various target specific ABI tweaks. ARM version. 2 3// Copyright (C) 2004, 2006 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 2, 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// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30/** @file cxxabi_tweaks.h 31 * The header provides an CPU-variable interface to the C++ ABI. 32 */ 33 34#ifndef _CXXABI_TWEAKS_H 35#define _CXXABI_TWEAKS_H 1 36 37#ifdef __cplusplus 38namespace __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 typedef int __guard; 50 51 // We also want the element size in array cookies. 52#define _GLIBCXX_ELTSIZE_IN_COOKIE 1 53 54 // __cxa_vec_ctor should return a pointer to the array. 55 typedef void * __cxa_vec_ctor_return_type; 56#define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x 57 // Constructors and destructors return the "this" pointer. 58 typedef void * __cxa_cdtor_return_type; 59 60#else // __ARM_EABI__ 61 62 // The generic ABI uses the first byte of a 64-bit guard variable. 63#define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0) 64#define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1 65 __extension__ typedef int __guard __attribute__((mode (__DI__))); 66 67 // __cxa_vec_ctor has void return type. 68 typedef void __cxa_vec_ctor_return_type; 69#define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return 70 // Constructors and destructors do not return a value. 71 typedef void __cxa_cdtor_return_type; 72 73#endif //!__ARM_EABI__ 74 75#ifdef __cplusplus 76 } 77} // namespace __cxxabiv1 78#endif 79 80#endif 81