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+// -*- C++ -*- Exception handling and frame unwind runtime interface routines.
+// Copyright (C) 2001 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC 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.
+//
+// GCC 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 GCC; 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.
+
+// This is derived from the C++ ABI for IA-64. Where we diverge
+// for cross-architecture compatibility are noted with "@@@".
+
+#ifndef _UNWIND_CXX_H
+#define _UNWIND_CXX_H 1
+
+// Level 2: C++ ABI
+
+#include <typeinfo>
+#include <exception>
+#include <cstddef>
+#include "unwind.h"
+
+#pragma GCC visibility push(default)
+
+namespace __cxxabiv1
+{
+
+// A primary C++ exception object consists of a header, which is a wrapper
+// around an unwind object header with additional C++ specific information,
+// followed by the exception object itself.
+
+struct __cxa_exception
+{
+ // Manage the exception object itself.
+ std::type_info *exceptionType;
+ void (*exceptionDestructor)(void *);
+
+ // The C++ standard has entertaining rules wrt calling set_terminate
+ // and set_unexpected in the middle of the exception cleanup process.
+ std::unexpected_handler unexpectedHandler;
+ std::terminate_handler terminateHandler;
+
+ // The caught exception stack threads through here.
+ __cxa_exception *nextException;
+
+ // How many nested handlers have caught this exception. A negated
+ // value is a signal that this object has been rethrown.
+ int handlerCount;
+
+ // Cache parsed handler data from the personality routine Phase 1
+ // for Phase 2 and __cxa_call_unexpected.
+ int handlerSwitchValue;
+ const unsigned char *actionRecord;
+ const unsigned char *languageSpecificData;
+ _Unwind_Ptr catchTemp;
+ void *adjustedPtr;
+
+ // The generic exception header. Must be last.
+ _Unwind_Exception unwindHeader;
+};
+
+
+// A dependent C++ exception object consists of a header, which is a wrapper
+// around an unwind object header with additional C++ specific information,
+// followed by the exception object itself.
+struct __cxa_dependent_exception
+{
+ // The primary exception
+ void *primaryException;
+
+ // The C++ standard has entertaining rules wrt calling set_terminate
+ // and set_unexpected in the middle of the exception cleanup process.
+ std::unexpected_handler unexpectedHandler;
+ std::terminate_handler terminateHandler;
+
+ // The caught exception stack threads through here.
+ __cxa_exception *nextException;
+
+ // How many nested handlers have caught this exception. A negated
+ // value is a signal that this object has been rethrown.
+ int handlerCount;
+
+ // Cache parsed handler data from the personality routine Phase 1
+ // for Phase 2 and __cxa_call_unexpected.
+ int handlerSwitchValue;
+ const unsigned char *actionRecord;
+ const unsigned char *languageSpecificData;
+ _Unwind_Ptr catchTemp;
+ void *adjustedPtr;
+
+ // The generic exception header. Must be last.
+ _Unwind_Exception unwindHeader;
+};
+
+
+// Each thread in a C++ program has access to a __cxa_eh_globals object.
+struct __cxa_eh_globals
+{
+ __cxa_exception *caughtExceptions;
+ unsigned int uncaughtExceptions;
+};
+
+
+// The __cxa_eh_globals for the current thread can be obtained by using
+// either of the following functions. The "fast" version assumes at least
+// one prior call of __cxa_get_globals has been made from the current
+// thread, so no initialization is necessary.
+extern "C" __cxa_eh_globals *__cxa_get_globals () throw();
+extern "C" __cxa_eh_globals *__cxa_get_globals_fast () throw();
+
+// Allocate memory for the primary exception plus the thrown object.
+extern "C" void *__cxa_allocate_exception(std::size_t thrown_size) throw();
+// Allocate memory for dependent exception.
+extern "C" __cxa_dependent_exception *__cxa_allocate_dependent_exception() throw();
+
+// Free the space allocated for the primary exception.
+extern "C" void __cxa_free_exception(void *thrown_exception) throw();
+// Free the space allocated for the dependent exception.
+extern "C" void __cxa_free_dependent_exception(__cxa_dependent_exception *dependent_exception) throw();
+
+// Throw the exception.
+extern "C" void __cxa_throw (void *thrown_exception,
+ std::type_info *tinfo,
+ void (*dest) (void *))
+ __attribute__((noreturn));
+
+// Used to implement exception handlers.
+extern "C" void *__cxa_begin_catch (void *) throw();
+extern "C" void __cxa_end_catch ();
+extern "C" void __cxa_rethrow () __attribute__((noreturn));
+
+// These facilitate code generation for recurring situations.
+extern "C" void __cxa_bad_cast ();
+extern "C" void __cxa_bad_typeid ();
+
+// @@@ These are not directly specified by the IA-64 C++ ABI.
+
+// Handles re-checking the exception specification if unexpectedHandler
+// throws, and if bad_exception needs to be thrown. Called from the
+// compiler.
+extern "C" void __cxa_call_unexpected (void *) __attribute__((noreturn));
+
+// Invokes given handler, dying appropriately if the user handler was
+// so inconsiderate as to return.
+extern void __terminate(std::terminate_handler) __attribute__((noreturn));
+extern void __unexpected(std::unexpected_handler) __attribute__((noreturn));
+
+// The current installed user handlers.
+extern std::terminate_handler __terminate_handler;
+extern std::unexpected_handler __unexpected_handler;
+
+// These are explicitly GNU C++ specific.
+
+// This is the exception class we report -- "GNUCC++\0".
+const _Unwind_Exception_Class __gxx_exception_class
+= ((((((((_Unwind_Exception_Class) 'G'
+ << 8 | (_Unwind_Exception_Class) 'N')
+ << 8 | (_Unwind_Exception_Class) 'U')
+ << 8 | (_Unwind_Exception_Class) 'C')
+ << 8 | (_Unwind_Exception_Class) 'C')
+ << 8 | (_Unwind_Exception_Class) '+')
+ << 8 | (_Unwind_Exception_Class) '+')
+ << 8 | (_Unwind_Exception_Class) '\0');
+
+// GNU C++ personality routine, Version 0.
+extern "C" _Unwind_Reason_Code __gxx_personality_v0
+ (int, _Unwind_Action, _Unwind_Exception_Class,
+ struct _Unwind_Exception *, struct _Unwind_Context *);
+
+// GNU C++ sjlj personality routine, Version 0.
+extern "C" _Unwind_Reason_Code __gxx_personality_sj0
+ (int, _Unwind_Action, _Unwind_Exception_Class,
+ struct _Unwind_Exception *, struct _Unwind_Context *);
+
+// Acquire the C++ exception header from the C++ object.
+static inline __cxa_exception *
+__get_exception_header_from_obj (void *ptr)
+{
+ return reinterpret_cast<__cxa_exception *>(ptr) - 1;
+}
+
+// Acquire the C++ exception header from the generic exception header.
+static inline __cxa_exception *
+__get_exception_header_from_ue (_Unwind_Exception *exc)
+{
+ return reinterpret_cast<__cxa_exception *>(exc + 1) - 1;
+}
+
+} /* namespace __cxxabiv1 */
+
+#pragma GCC visibility pop
+
+#endif // _UNWIND_CXX_H