[x64] Assembler support for internal references and RIP relative addressing.

src/x64/disasm-x64.cc

Index: src/x64/disasm-x64.cc
diff --git a/src/x64/disasm-x64.cc b/src/x64/disasm-x64.cc
index ded6c331ecf3ef9ff6b8f247a4364fa617c7b7f6..bed99d101a35f8ebccea83a309cded92165e9a80 100644
--- a/src/x64/disasm-x64.cc
+++ b/src/x64/disasm-x64.cc
@@ -503,7 +503,7 @@ int DisassemblerX64::PrintRightOperandHelper(
     case 0:
       if ((rm & 7) == 5) {
         int32_t disp = *reinterpret_cast<int32_t*>(modrmp + 1);
-        AppendToBuffer("[0x%x]", disp);
+        AppendToBuffer("[rip+0x%x]", disp);
         return 5;
       } else if ((rm & 7) == 4) {
         // Codes for SIB byte.
@@ -1500,6 +1500,8 @@ int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) {
     get_modrm(*current, &mod, &regop, &rm);
     AppendToBuffer("%s,", NameOfCPURegister(regop));
     current += PrintRightOperand(current);
+  } else if (opcode == 0x0B) {
+    AppendToBuffer("ud2");
   } else {
     UnimplementedInstruction();
   }