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

src/x64/disasm-x64.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <assert.h>
 #include <stdarg.h>
 #include <stdio.h>
 
 #include "src/v8.h"
 
@@ skipping 485 matching lines @@
     byte* modrmp,
     RegisterNameMapping direct_register_name) {
   int mod, regop, rm;
   get_modrm(*modrmp, &mod, &regop, &rm);
   RegisterNameMapping register_name = (mod == 3) ? direct_register_name :
       &DisassemblerX64::NameOfCPURegister;
   switch (mod) {
     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.
         byte sib = *(modrmp + 1);
         int scale, index, base;
         get_sib(sib, &scale, &index, &base);
         if (index == 4 && (base & 7) == 4 && scale == 0 /*times_1*/) {
           // index == rsp means no index. Only use sib byte with no index for
           // rsp and r12 base.
           AppendToBuffer("[%s]", NameOfCPURegister(base));
@@ skipping 976 matching lines @@
       AppendToBuffer(",%s", NameOfCPURegister(regop));
     } else {
       AppendToBuffer(",%s,cl", NameOfCPURegister(regop));
     }
   } else if (opcode == 0xBD) {
     AppendToBuffer("%s%c ", mnemonic, operand_size_code());
     int mod, regop, rm;
     get_modrm(*current, &mod, &regop, &rm);
     AppendToBuffer("%s,", NameOfCPURegister(regop));
     current += PrintRightOperand(current);
+  } else if (opcode == 0x0B) {
+    AppendToBuffer("ud2");
   } else {
     UnimplementedInstruction();
   }
   return static_cast<int>(current - data);
 }
 
 
 // Mnemonics for two-byte opcode instructions starting with 0x0F.
 // The argument is the second byte of the two-byte opcode.
 // Returns NULL if the instruction is not handled here.
@@ skipping 598 matching lines @@
     for (int i = 6 - static_cast<int>(pc - prev_pc); i >= 0; i--) {
       fprintf(f, "  ");
     }
     fprintf(f, "  %s\n", buffer.start());
   }
 }
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_X64