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 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 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