V4: add mips32 disassembler.

Add a rudimentary disassembler for mips32 instruction set.
Although few instructions might be missing, the whole set from
MacroAssemblerMIPS should be covered.

Change-Id: I9b1b9b40537b99098ca65036f671651d04fe1ab6
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/src/3rdparty/masm/disassembler/Mips32Disassembler.cpp b/src/3rdparty/masm/disassembler/Mips32Disassembler.cpp
new file mode 100644
index 0000000000..af0a73b2cb
--- /dev/null
+++ b/src/3rdparty/masm/disassembler/Mips32Disassembler.cpp
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2015 Cisco Systems, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY CISCO SYSTEMS, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CISCO SYSTEMS, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "Disassembler.h"
+
+#if USE(MIPS32_DISASSEMBLER)
+
+#include "mips32/Mips32Opcode.h"
+#include "MacroAssemblerCodeRef.h"
+
+namespace JSC {
+
+bool tryToDisassemble(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out)
+{
+    Mips32Opcode mipsOpcode;
+
+    uint32_t* currentPC = reinterpret_cast<uint32_t*>(reinterpret_cast<uintptr_t>(codePtr.executableAddress()) & ~3);
+    uint32_t* endPC = currentPC + (size / sizeof(uint32_t));
+
+    while (currentPC < endPC) {
+        char pcString[12];
+        snprintf(pcString, sizeof(pcString), "0x%x", reinterpret_cast<unsigned>(currentPC));
+        out.printf("%s%10s: %s\n", prefix, pcString, mipsOpcode.disassemble(currentPC));
+        currentPC++;
+    }
+
+    return true;
+}
+
+} // namespace JSC
+
+#endif // USE(MIPS32_DISASSEMBLER)
+