1 // Control various target specific ABI tweaks. ARM version.
3 // Copyright (C) 2004, 2006, 2008 Free Software Foundation, Inc.
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)
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.
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,
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.
30 /** @file cxxabi_tweaks.h
31 * The header provides an CPU-variable interface to the C++ ABI.
34 #ifndef _CXXABI_TWEAKS_H
35 #define _CXXABI_TWEAKS_H 1
45 // The ARM EABI uses the least significant bit of a 32-bit
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)
54 // We also want the element size in array cookies.
55 #define _GLIBCXX_ELTSIZE_IN_COOKIE 1
57 // __cxa_vec_ctor should return a pointer to the array.
58 typedef void * __cxa_vec_ctor_return_type
;
59 #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x
60 // Constructors and destructors return the "this" pointer.
61 typedef void * __cxa_cdtor_return_type
;
65 // The generic ABI uses the first byte of a 64-bit guard variable.
66 #define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0)
67 #define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1
68 #define _GLIBCXX_GUARD_BIT __guard_test_bit (0, 1)
69 #define _GLIBCXX_GUARD_PENDING_BIT __guard_test_bit (1, 1)
70 #define _GLIBCXX_GUARD_WAITING_BIT __guard_test_bit (2, 1)
71 __extension__
typedef int __guard
__attribute__((mode (__DI__
)));
73 // __cxa_vec_ctor has void return type.
74 typedef void __cxa_vec_ctor_return_type
;
75 #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return
76 // Constructors and destructors do not return a value.
77 typedef void __cxa_cdtor_return_type
;
79 #endif //!__ARM_EABI__
83 } // namespace __cxxabiv1