Initial attempt to as operating system syscall handler.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

1 files changed, 67 insertions, 0 deletions

diff --git a/qtmips_osemu/ossyscall.h b/qtmips_osemu/ossyscall.h
new file mode 100644
index 0000000..f2c8137
--- /dev/null
+++ b/qtmips_osemu/ossyscall.h
@@ -0,0 +1,67 @@
+// 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 OSSYCALL_H
+#define OSSYCALL_H
+
+#include <QObject>
+#include <qtmipsexception.h>
+#include <machineconfig.h>
+#include <registers.h>
+#include <memory.h>
+#include <core.h>
+#include <instruction.h>
+#include <alu.h>
+
+namespace osemu {
+
+class OsSyscallExceptionHandler : public machine::ExceptionHandler {
+    Q_OBJECT
+public:
+    bool handle_exception(machine::Core *core, machine::Registers *regs,
+                          machine::ExceptionCause excause, std::uint32_t inst_addr,
+                          std::uint32_t next_addr, std::uint32_t jump_branch_pc,
+                          bool in_delay_slot, std::uint32_t mem_ref_addr);
+    int syscall_default_handler(std::uint32_t &result, machine::Core *core,
+                   std::uint32_t syscall_num,
+                   std::uint32_t a1, std::uint32_t a2, std::uint32_t a3,
+                   std::uint32_t a4, std::uint32_t a5, std::uint32_t a6,
+                   std::uint32_t a7, std::uint32_t a8);
+
+};
+
+}
+
+#endif // OSSYCALL_H