libstdc++-v3/config/cpu/arm/cxxabi_tweaks.h

   1 // Control various target specific ABI tweaks.  ARM version.
   2
   3 // Copyright (C) 2004 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  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 #ifndef _CXXABI_TWEAKS_H
  31 #define _CXXABI_TWEAKS_H 1
  32
  33 #ifdef __cplusplus
  34 namespace __cxxabiv1
  35 {
  36 #endif
  37
  38 #ifdef __ARM_EABI__
  39   // The ARM EABI uses the least significant bit of a 32-bit
  40   // guard variable.  */
  41 #define _GLIBCXX_GUARD_TEST(x) ((*(x) & 1) != 0)
  42 #define _GLIBCXX_GUARD_SET(x) *(x) = 1
  43   typedef int __guard;
  44
  45   // We also want the element size in array cookies.
  46 #define _GLIBCXX_ELTSIZE_IN_COOKIE 1
  47
  48   // __cxa_vec_ctor should return a pointer to the array.
  49   typedef void * __cxa_vec_ctor_return_type;
  50 #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return x
  51   // Constructors and destructors return the "this" pointer.
  52   typedef void * __cxa_cdtor_return_type;
  53
  54 #else // __ARM_EABI__
  55
  56   // The generic ABI uses the first byte of a 64-bit guard variable.
  57 #define _GLIBCXX_GUARD_TEST(x) (*(char *) (x) != 0)
  58 #define _GLIBCXX_GUARD_SET(x) *(char *) (x) = 1
  59   __extension__ typedef int __guard __attribute__((mode (__DI__)));
  60
  61   // __cxa_vec_ctor has void return type.
  62   typedef void __cxa_vec_ctor_return_type;
  63 #define _GLIBCXX_CXA_VEC_CTOR_RETURN(x) return
  64   // Constructors and destructors do not return a value.
  65   typedef void __cxa_cdtor_return_type;
  66
  67 #endif //!__ARM_EABI__
  68
  69 #ifdef __cplusplus
  70 } // namespace __cxxabiv1
  71 #endif
  72
  73 #endif // __cxxabiv1