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// SPDX-License-Identifier: GPL-2.0+
/*******************************************************************************
* QtMips - MIPS 32-bit Architecture Subset Simulator
*
* Implemented to support following courses:
*
* B35APO - Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b35apo
*
* B4M35PAP - Advanced Computer Architectures
* https://cw.fel.cvut.cz/wiki/courses/b4m35pap/start
*
* Copyright (c) 2017-2019 Karel Koci<cynerd@email.cz>
* Copyright (c) 2019 Pavel Pisa <pisa@cmp.felk.cvut.cz>
*
* Faculty of Electrical Engineering (http://www.fel.cvut.cz)
* Czech Technical University (http://www.cvut.cz/)
*
* This program 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
* of the License, or (at your option) any later version.
*
* This program 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 program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
******************************************************************************/
#ifndef QTMIPSEXCEPTION_H
#define QTMIPSEXCEPTION_H
#include <exception>
#include <qstring.h>
namespace machine {
// Base exception for all machine ones
class QtMipsException : public std::exception {
public:
QtMipsException(QString reason, QString ext, QString file, int line);
const char *what() const throw();
QString msg(bool pos) const;
protected:
QString name, reason, ext, file;
int line;
};
/* This is list of all QtMips specific exceptions
*
* Input:
* Exception durring input loading
* Runtime:
* Exceptions caused by machine invalid input or unsupported action
* UnsupportedInstruction:
* Decoded instruction is not supported.
* This can be cause by really using some unimplemented instruction or because of problems in instruction decode.
* UnsupportedAluOperation:
* Decoded ALU operation is not supported
* This is basically same exception as QtMipsExceptionUnsupportedInstruction but it is emmited from ALU when executed and not before that.
* Overflow:
* Integer operation resulted to overflow (or underflow as we are working with unsigned values)
* This is for sure caused by program it self.
* UnalignedJump:
* Instruction is jumping to unaligned address (ADDR % 4 != 0)
* This can be caused by bug or by user program as it can be jumping relative to register
* This shouldn't be happening with non-register jumps as those should be verified by compiler
* UnknownMemoryControl:
* Used unknown MemoryAccess control value (write_ctl or read_ctl)
* This can be raised by invalid instruction but in such case we shoul raise UnknownInstruction instead
* So this should signal just some QtMips bug.
* OutOfMemoryAccess:
* Trying to access address outside of the memory
* As we are simulating whole 32bit memory address space then this is most probably QtMips bug if raised not program.
* Sanity:
* This is sanity check exception
*/
#define QTMIPS_EXCEPTIONS \
EXCEPTION(Input,) \
EXCEPTION(Runtime,) \
EXCEPTION(UnsupportedInstruction, Runtime) \
EXCEPTION(UnsupportedAluOperation, Runtime) \
EXCEPTION(Overflow, Runtime) \
EXCEPTION(UnalignedJump, Runtime) \
EXCEPTION(UnknownMemoryControl, Runtime) \
EXCEPTION(OutOfMemoryAccess, Runtime) \
EXCEPTION(Sanity,)
#define EXCEPTION(NAME, PARENT) \
class QtMipsException##NAME : public QtMipsException##PARENT { \
public: \
QtMipsException##NAME(QString reason, QString ext, QString file, int line); \
};
QTMIPS_EXCEPTIONS
#undef EXCEPTION
// This is helper macro for throwing QtMips exceptions
#define QTMIPS_EXCEPTION(TYPE, REASON, EXT) (machine::QtMipsException##TYPE (QString(REASON), QString(EXT), QString(__FILE__), __LINE__))
// Sanity comparison potentially throwing QtMipsExceptionSanity
#define SANITY_ASSERT(COND, MSG) do { if (!(COND)) throw QTMIPS_EXCEPTION(Sanity, "Sanity check failed (" #COND ")", MSG); } while (false)
}
#endif // QTMIPSEXCEPTION_H
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