From 9cf92379d5fcf0076c25dae0935daab446c992cd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Wed, 30 Aug 2017 21:37:53 +0200
Subject: Initial commit

Adding work done so far.
---
 qtmips_machine/qtmipsexception.h | 63 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 qtmips_machine/qtmipsexception.h

(limited to 'qtmips_machine/qtmipsexception.h')

diff --git a/qtmips_machine/qtmipsexception.h b/qtmips_machine/qtmipsexception.h
new file mode 100644
index 0000000..bfaa788
--- /dev/null
+++ b/qtmips_machine/qtmipsexception.h
@@ -0,0 +1,63 @@
+#ifndef QTMIPSEXCEPTION_H
+#define QTMIPSEXCEPTION_H
+
+#include <exception>
+#include <string>
+
+#define QTMIPS_EXCEPTION(TYPE, REASON, EXT) (QtMipsException ## TYPE (std::string(REASON), std::string(EXT), std::string(__FILE__), __LINE__))
+#define QTMIPS_ARGS_COMMON std::string reason, std::string ext, std::string file, int line
+
+// Base exception for all machine ones
+class QtMipsException : public std::exception {
+public:
+    QtMipsException(QTMIPS_ARGS_COMMON);
+    const char *what() const throw();
+    std::string msg(bool pos) const;
+protected:
+    std::string reason, ext, file;
+    int line;
+};
+
+// Exception durring input loading
+class QtMipsExceptionInput : public QtMipsException {
+public:
+    QtMipsExceptionInput(QTMIPS_ARGS_COMMON);
+};
+
+// Exceptions caused by machine invalid input or unsupported action
+class QtMipsExceptionRuntime : public QtMipsException {
+public:
+    QtMipsExceptionRuntime(QTMIPS_ARGS_COMMON);
+};
+
+// Decoded instruction is not supported.
+// This can be cause by really using some unimplemented instruction or because of problems in instruction decode.
+class QtMipsExceptionUnsupportedInstruction : public QtMipsExceptionRuntime {
+public:
+    QtMipsExceptionUnsupportedInstruction(QTMIPS_ARGS_COMMON);
+};
+
+// 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
+class QtMipsExceptionUnalignedJump : public QtMipsExceptionRuntime {
+public:
+    QtMipsExceptionUnalignedJump(QTMIPS_ARGS_COMMON);
+};
+
+// 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.
+class QtMipsExceptionOutOfMemoryAccess : public QtMipsExceptionRuntime {
+public:
+    QtMipsExceptionOutOfMemoryAccess(QTMIPS_ARGS_COMMON);
+};
+
+// This is sanity check exception
+class QtMipsExceptionSanity : public QtMipsException {
+public:
+    QtMipsExceptionSanity(QTMIPS_ARGS_COMMON);
+};
+
+#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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