Use movw/movt instead of constant pool on ARMv7

src/x64/assembler-x64.h

 // Copyright (c) 1994-2006 Sun Microsystems 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:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 563 matching lines @@
   // Read/Modify the code target in the relative branch/call instruction at pc.
   // On the x64 architecture, we use relative jumps with a 32-bit displacement
   // to jump to other Code objects in the Code space in the heap.
   // Jumps to C functions are done indirectly through a 64-bit register holding
   // the absolute address of the target.
   // These functions convert between absolute Addresses of Code objects and
   // the relative displacements stored in the code.
   static inline Address target_address_at(Address pc);
   static inline void set_target_address_at(Address pc, Address target);
 
+  // Return the code target address at a call site from the return address
+  // of that call in the instruction stream.
+  static inline Address target_address_from_return_address(Address pc);
+
   // This sets the branch destination (which is in the instruction on x64).
   // This is for calls and branches within generated code.
   inline static void deserialization_set_special_target_at(
       Address instruction_payload, Address target) {
     set_target_address_at(instruction_payload, target);
   }
 
   // This sets the branch destination (which is a load instruction on x64).
   // This is for calls and branches to runtime code.
   inline static void set_external_target_at(Address instruction_payload,
@@ skipping 19 matching lines @@
   static const int kPatchDebugBreakSlotAddressOffset = 13 - 4;
   // TODO(X64): Rename this, removing the "Real", after changing the above.
   static const int kRealPatchReturnSequenceAddressOffset = 2;
 
   // Some x64 JS code is padded with int3 to make it large
   // enough to hold an instruction when the debugger patches it.
   static const int kJumpInstructionLength = 13;
   static const int kCallInstructionLength = 13;
   static const int kJSReturnSequenceLength = 13;
   static const int kShortCallInstructionLength = 5;
+  static const int kPatchDebugBreakSlotReturnOffset = 4;
 
   // The debug break slot must be able to contain a call instruction.
   static const int kDebugBreakSlotLength = kCallInstructionLength;
 
   // One byte opcode for test eax,0xXXXXXXXX.
   static const byte kTestEaxByte = 0xA9;
   // One byte opcode for test al, 0xXX.
   static const byte kTestAlByte = 0xA8;
   // One byte opcode for nop.
   static const byte kNopByte = 0x90;
@@ skipping 1039 matching lines @@
  private:
   Assembler* assembler_;
 #ifdef DEBUG
   int space_before_;
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_ASSEMBLER_X64_H_