V4: add Aarch64/ARM64 support.

This uses the JavaScriptCore assembler rev. 195098. It is tested on iOS
(for which it is disabled, as it only allows marking pages as executable when
running from Xcode). Testing on Linux will be done when hardware
arrives.

Change-Id: I650e15fec03c27d4b326a2d70863a89b85cfc5c3
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

1 files changed, 72 insertions, 0 deletions

diff --git a/src/3rdparty/masm/disassembler/ARM64Disassembler.cpp b/src/3rdparty/masm/disassembler/ARM64Disassembler.cpp
new file mode 100644
index 0000000000..27ae4b96d0
--- /dev/null
+++ b/src/3rdparty/masm/disassembler/ARM64Disassembler.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2012, 2014 Apple 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 APPLE 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 APPLE 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.
+ */
+
+#define __STDC_FORMAT_MACROS
+#include "config.h"
+#include "Disassembler.h"
+
+#if USE(ARM64_DISASSEMBLER) && CPU(ARM64)
+
+#include "ARM64/A64DOpcode.h"
+#include "MacroAssemblerCodeRef.h"
+
+namespace JSC {
+
+bool tryToDisassemble(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out)
+{
+    A64DOpcode arm64Opcode;
+
+    uint32_t* currentPC = reinterpret_cast<uint32_t*>(codePtr.executableAddress());
+    size_t byteCount = size;
+
+    while (byteCount) {
+        char pcString[20];
+        snprintf(pcString, sizeof(pcString), "0x%lx", reinterpret_cast<unsigned long>(currentPC));
+        out.printf("%s%16s: %s\n", prefix, pcString, arm64Opcode.disassemble(currentPC));
+        currentPC++;
+        byteCount -= sizeof(uint32_t);
+    }
+
+    return true;
+}
+
+} // namespace JSC
+
+#endif // USE(ARM64_DISASSEMBLER)
+
+#if USE(LLVM_DISASSEMBLER) && CPU(ARM64)
+
+#include "LLVMDisassembler.h"
+
+namespace JSC {
+
+bool tryToDisassemble(const MacroAssemblerCodePtr& codePtr, size_t size, const char* prefix, PrintStream& out, InstructionSubsetHint hint)
+{
+    return tryToDisassembleWithLLVM(codePtr, size, prefix, out, hint);
+}
+
+} // namespace JSC
+
+#endif // USE(LLVM_DISASSEMBLER) && CPU(ARM64)