cxxabi_tweaks.h: New file.

	* config/cpu/arm/cxxabi_tweaks.h: New file.
	* config/cpu/generic/cxxabi_tweaks.h: New file.

From-SVN: r84035

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

+// Control various target specific ABI tweaks.  ARM version.
+
+// Copyright (C) 2004 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#ifndef _CXXABI_TWEAKS_H
+#define _CXXABI_TWEAKS_H 1
+
+#ifdef __cplusplus
+namespace __cxxabiv1
+{
+#endif
+
+#ifdef __ARM_EABI__
+  // The ARM EABI uses the least significan bit of a 32-bit
+  // guard variable.  */
+#define _GLIBCXX_GUARD_ACQUIRE(x) (!(*(x) & 1))
+#define _GLIBCXX_GUARD_RELEASE(x) *(x) = 1
+  typedef int __guard;
+
+  // We also want the element size in array cookies.
+#define _GLIBCXX_ELTSIZE_IN_COOKIE 1
+  
+#else
+  // The generic ABI uses the first byte of a 64-bit guard variable.
+#define _GLIBCXX_GUARD_ACQUIRE(x) (!*(char *) (x))
+#define _GLIBCXX_GUARD_RELEASE(x) *(char *) (x) = 1
+  __extension__ typedef int __guard __attribute__((mode (__DI__)));
+#endif
+
+#ifdef __cplusplus
+} // namespace __cxxabiv1
+#endif
+
+#endif // __cxxabiv1

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

+// Control various target specific ABI tweaks.  Generic version.
+
+// Copyright (C) 2004 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#ifndef _CXXABI_TWEAKS_H
+#define _CXXABI_TWEAKS_H 1
+
+#ifdef __cplusplus
+namespace __cxxabiv1
+{
+#endif
+
+  // The generic ABI uses the first byte of a 64-bit guard variable.
+#define _GLIBCXX_GUARD_ACQUIRE(x) (!*(char *) (x))
+#define _GLIBCXX_GUARD_RELEASE(x) *(char *) (x) = 1
+  __extension__ typedef int __guard __attribute__((mode (__DI__)));
+
+#ifdef __cplusplus
+} // namespace __cxxabiv1
+#endif
+
+#endif // __cxxabiv1