1 files changed, 138 insertions, 0 deletions
diff --git a/src/qml/jsruntime/qv4engine_cxxabi.cpp b/src/qml/jsruntime/qv4engine_cxxabi.cpp
new file mode 100644
index 0000000000..6141753ccc
--- /dev/null
+++ b/src/qml/jsruntime/qv4engine_cxxabi.cpp
@@ -0,0 +1,138 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qv4engine_p.h"
+
+#if defined(V4_CXX_ABI_EXCEPTION)
+
+// On arm we link libgcc statically and want to avoid exporting the _Unwind* symbols
+#if defined(Q_PROCESSOR_ARM)
+#define HIDE_EXPORTS
+#endif
+
+#include <unwind.h>
+#include <exception>
+
+namespace {
+
+// 2.1.1 from http://mentorembedded.github.io/cxx-abi/abi-eh.html
+struct cxa_exception {
+    std::type_info *typeInfo;
+    void (*exceptionDestructor)(void*);
+    std::unexpected_handler unexpectedHandler;
+    std::terminate_handler terminateHandler;
+    cxa_exception *nextException;
+    int handlerCount;
+#ifdef __ARM_EABI_UNWINDER__
+    cxa_exception *nextPropagatingException;
+    int propagationCount;
+#else
+    int handlerSwitchValue;
+    const char *actionRecord;
+    const char *languageSpecificData;
+    void *catchTemp;
+    void *adjustedPtr;
+#endif
+    _Unwind_Exception unwindHeader;
+};
+
+struct cxa_eh_globals
+{
+    cxa_exception *caughtExceptions;
+    unsigned int uncaughtExceptions;
+#ifdef __ARM_EABI_UNWINDER__
+    cxa_exception* propagatingExceptions;
+#endif
+};
+
+}
+
+extern "C" cxa_eh_globals *__cxa_get_globals();
+
+static void exception_cleanup(_Unwind_Reason_Code, _Unwind_Exception *ex)
+{
+    free(ex);
+}
+
+QT_BEGIN_NAMESPACE
+
+using namespace QV4;
+
+void ExecutionEngine::throwInternal()
+{
+    _Unwind_Exception *exception = (_Unwind_Exception*)malloc(sizeof(_Unwind_Exception));
+    memset(exception, 0, sizeof(*exception));
+    exception->exception_cleanup = &exception_cleanup;
+
+#ifdef __ARM_EABI_UNWINDER__
+    exception->exception_class[0] = 'Q';
+    exception->exception_class[1] = 'M';
+    exception->exception_class[2] = 'L';
+    exception->exception_class[3] = 'J';
+    exception->exception_class[4] = 'S';
+    exception->exception_class[5] = 'V';
+    exception->exception_class[6] = '4';
+    exception->exception_class[7] = 0;
+#else
+    exception->exception_class = 0x514d4c4a53563400; // QMLJSV40
+#endif
+
+    _Unwind_RaiseException(exception);
+    std::terminate();
+}
+
+void ExecutionEngine::rethrowInternal()
+{
+    cxa_eh_globals *globals = __cxa_get_globals();
+    cxa_exception *exception = globals->caughtExceptions;
+
+    // Make sure we only re-throw our foreign exceptions. For general re-throw
+    // we'd need different code.
+#ifndef __ARM_EABI_UNWINDER__
+    Q_ASSERT(exception->unwindHeader.exception_class == 0x514d4c4a53563400); // QMLJSV40
+#endif
+
+    globals->caughtExceptions = 0;
+    _Unwind_RaiseException(&exception->unwindHeader);
+}
+
+QT_END_NAMESPACE
+
+#endif