AArch64: Add ARM64 Disassembler

This patch adds disassembler support for ARM64 based on VIXL.

Change-Id: Ic7f5e197350809632145d932dbae8f6c16aebd13
Signed-off-by: Serban Constantinescu <serban.constantinescu@arm.com>

1 files changed, 48 insertions, 0 deletions

diff --git a/disassembler/disassembler_arm64.cc b/disassembler/disassembler_arm64.cc
new file mode 100644
index 0000000000..864d22da76
--- /dev/null
+++ b/disassembler/disassembler_arm64.cc
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "disassembler_arm64.h"
+
+#include <inttypes.h>
+
+#include <iostream>
+
+#include "base/logging.h"
+#include "base/stringprintf.h"
+#include "thread.h"
+
+namespace art {
+namespace arm64 {
+
+static uint32_t ReadU32(const uint8_t* ptr) {
+  return *((const uint32_t*)ptr);
+}
+
+size_t DisassemblerArm64::Dump(std::ostream& os, const uint8_t* begin) {
+  uint32_t instruction = ReadU32(begin);
+  decoder.Decode(reinterpret_cast<vixl::Instruction*>(&instruction));
+  os << StringPrintf("%p: %08x\t%s\n", begin, instruction, disasm.GetOutput());
+  return vixl::kInstructionSize;
+}
+
+void DisassemblerArm64::Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) {
+  for (const uint8_t* cur = begin; cur < end; cur += vixl::kInstructionSize) {
+    Dump(os, cur);
+  }
+}
+
+}  // namespace arm64
+}  // namespace art