/*

 * Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef CPU_ARM_VM_FRAME_ARM_HPP

#define CPU_ARM_VM_FRAME_ARM_HPP

#include "runtime/synchronizer.hpp"

 public:

  enum {

    pc_return_offset                                 =  0,

    // All frames

    link_offset                                      =  0,

    return_addr_offset                               =  1,

    // non-interpreter frames

    sender_sp_offset                                 =  2,

    // Interpreter frames

#ifdef AARCH64

    interpreter_frame_gp_saved_result_offset         =  4, // for native calls only

    interpreter_frame_fp_saved_result_offset         =  3, // for native calls only

#endif

    interpreter_frame_oop_temp_offset                =  2, // for native calls only

    interpreter_frame_sender_sp_offset               = -1,

#ifdef AARCH64

    interpreter_frame_stack_top_offset               = interpreter_frame_sender_sp_offset - 1,

    interpreter_frame_extended_sp_offset             = interpreter_frame_stack_top_offset - 1,

    interpreter_frame_method_offset                  = interpreter_frame_extended_sp_offset - 1,

#else

    // outgoing sp before a call to an invoked method

    interpreter_frame_last_sp_offset                 = interpreter_frame_sender_sp_offset - 1,

    interpreter_frame_method_offset                  = interpreter_frame_last_sp_offset - 1,

#endif // AARCH64

    interpreter_frame_mirror_offset                  = interpreter_frame_method_offset - 1,

    interpreter_frame_mdp_offset                     = interpreter_frame_mirror_offset - 1,

    interpreter_frame_cache_offset                   = interpreter_frame_mdp_offset - 1,

    interpreter_frame_locals_offset                  = interpreter_frame_cache_offset - 1,

    interpreter_frame_bcp_offset                     = interpreter_frame_locals_offset - 1,

    interpreter_frame_initial_sp_offset              = interpreter_frame_bcp_offset - 1,

    interpreter_frame_monitor_block_top_offset       = interpreter_frame_initial_sp_offset,

    interpreter_frame_monitor_block_bottom_offset    = interpreter_frame_initial_sp_offset,

    // Entry frames

    entry_frame_call_wrapper_offset                  =  AARCH64_ONLY(2) NOT_AARCH64(0)

  };

  intptr_t ptr_at(int offset) const {

    return *ptr_at_addr(offset);

  }

  void ptr_at_put(int offset, intptr_t value) {

    *ptr_at_addr(offset) = value;

  }

 private:

  // an additional field beyond _sp and _pc:

  intptr_t* _fp; // frame pointer

  // The interpreter and adapters will extend the frame of the caller.

  // Since oopMaps are based on the sp of the caller before extension

  // we need to know that value. However in order to compute the address

  // of the return address we need the real "raw" sp. Since sparc already

  // uses sp() to mean "raw" sp and unextended_sp() to mean the caller's

  // original sp we use that convention.

  intptr_t* _unextended_sp;

  void adjust_unextended_sp();

  intptr_t* ptr_at_addr(int offset) const {

    return (intptr_t*) addr_at(offset);

  }

#ifdef ASSERT

  // Used in frame::sender_for_{interpreter,compiled}_frame

  static void verify_deopt_original_pc(   CompiledMethod* nm, intptr_t* unextended_sp, bool is_method_handle_return = false);

  static void verify_deopt_mh_original_pc(CompiledMethod* nm, intptr_t* unextended_sp) {

    verify_deopt_original_pc(nm, unextended_sp, true);

  }

#endif

 public:

  // Constructors

  frame(intptr_t* sp, intptr_t* fp, address pc);

  frame(intptr_t* sp, intptr_t* unextended_sp, intptr_t* fp, address pc);

#ifndef AARCH64

  frame(intptr_t* sp, intptr_t* fp);

#endif // !AARCH64

  void init(intptr_t* sp, intptr_t* fp, address pc);

  // accessors for the instance variables

  // Note: not necessarily the real 'frame pointer' (see real_fp)

  intptr_t* fp() const { return _fp; }

  inline address* sender_pc_addr() const;

#ifdef AARCH64

  // Used by template based interpreter deoptimization

  void interpreter_frame_set_stack_top(intptr_t* stack_top);

  void interpreter_frame_set_extended_sp(intptr_t* sp);

#else

  // expression stack tos if we are nested in a java call

  intptr_t* interpreter_frame_last_sp() const;

  // deoptimization support

  void interpreter_frame_set_last_sp(intptr_t* sp);

#endif // AARCH64

  // helper to update a map with callee-saved FP

  static void update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr);

#endif // CPU_ARM_VM_FRAME_ARM_HPP