1 // Control various target specific ABI tweaks. ARM version. 2 3 // Copyright (C) 2004, 2006, 2008, 2009 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 cxxabi_tweaks.h 26 * The header provides an CPU-variable interface to the C++ ABI. 27 */ 28 29 #ifndef _CXXABI_TWEAKS_H 30 #define _CXXABI_TWEAKS_H 1 31 32 #ifdef __cplusplus 33 namespace __cxxabiv1 34 { 35 extern "C" 36 { 37 #endif 38 39 #ifdef __ARM_EABI__ 40 // The ARM EABI uses the least significant bit of a 32-bit 41 // guard variable. */ 42 #define _GLIBCXX_GUARD_TEST(x) ((*(x) & 1) != 0) 43 #define _GLIBCXX_GUARD_SET(x) *(x) = 1 44 #define _GLIBCXX_GUARD_BIT 1 45 #define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1) 46 #define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1) 47 typedef int __guard; 48 49 // We also want the element size in array cookies. 50 #define _GLIBCXX_ELTSIZE_IN_COOKIE 1 51 52 // __cxa_vec_ctor should return a pointer to the array. 53 typedef void * __cxa_vec_ctor_return_type; 54 #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x 55 // Constructors and destructors return the "this" pointer. 56 typedef void * __cxa_cdtor_return_type; 57 58 #else // __ARM_EABI__ 59 60 // The generic ABI uses the first byte of a 64-bit guard variable. 61 #define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0) 62 #define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1 63 #define _GLIBCXX_GUARD_BIT __guard_test_bit (0, 1) 64 #define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1) 65 #define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1) 66 __extension__ typedef int __guard __attribute__((mode (__DI__))); 67 68 // __cxa_vec_ctor has void return type. 69 typedef void __cxa_vec_ctor_return_type; 70 #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return 71 // Constructors and destructors do not return a value. 72 typedef void __cxa_cdtor_return_type; 73 74 #endif //!__ARM_EABI__ 75 76 #ifdef __cplusplus 77 } 78 } // namespace __cxxabiv1 79 #endif 80 81 #endif 82
