/*

 * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.

 * Copyright (c) 2014, Red Hat Inc. 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.

 *

 */

#include "precompiled.hpp"

#include "asm/macroAssembler.hpp"

#include "code/relocInfo.hpp"

#include "nativeInst_aarch64.hpp"

#include "oops/oop.inline.hpp"

#include "runtime/safepoint.hpp"

void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {

  if (verify_only)

    return;

  int bytes;

  switch(type()) {

  case relocInfo::oop_type:

    {

      oop_Relocation *reloc = (oop_Relocation *)this;

      if (NativeInstruction::is_ldr_literal_at(addr())) {

        address constptr = (address)code()->oop_addr_at(reloc->oop_index());

        bytes = MacroAssembler::pd_patch_instruction_size(addr(), constptr);

        assert(*(address*)constptr == x, "error in oop relocation");

      } else{

        bytes = MacroAssembler::patch_oop(addr(), x);

      }

    }

    break;

  default:

    bytes = MacroAssembler::pd_patch_instruction_size(addr(), x);

    break;

  }

  ICache::invalidate_range(addr(), bytes);

}

address Relocation::pd_call_destination(address orig_addr) {

  assert(is_call(), "should be a call here");

  if (NativeCall::is_call_at(addr())) {

    address trampoline = nativeCall_at(addr())->get_trampoline();

    if (trampoline) {

      return nativeCallTrampolineStub_at(trampoline)->destination();

    }

  }

  if (orig_addr != NULL) {

    address new_addr = MacroAssembler::pd_call_destination(orig_addr);

    // If call is branch to self, don't try to relocate it, just leave it

    // as branch to self. This happens during code generation if the code

    // buffer expands. It will be relocated to the trampoline above once

    // code generation is complete.

    new_addr = (new_addr == orig_addr) ? addr() : new_addr;

    return new_addr;

  }

  return MacroAssembler::pd_call_destination(addr());

}

void Relocation::pd_set_call_destination(address x) {

  assert(is_call(), "should be a call here");

  if (NativeCall::is_call_at(addr())) {

    address trampoline = nativeCall_at(addr())->get_trampoline();

    if (trampoline) {

      nativeCall_at(addr())->set_destination_mt_safe(x, /* assert_lock */false);

      return;

    }

  }

  assert(addr() != x, "call instruction in an infinite loop");

  MacroAssembler::pd_patch_instruction(addr(), x);

  assert(pd_call_destination(addr()) == x, "fail in reloc");

}

address* Relocation::pd_address_in_code() {

  return (address*)(addr() + 8);

}

address Relocation::pd_get_address_from_code() {

  return MacroAssembler::pd_call_destination(addr());

}

void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {

  if (NativeInstruction::maybe_cpool_ref(addr())) {

    address old_addr = old_addr_for(addr(), src, dest);

    MacroAssembler::pd_patch_instruction(addr(), MacroAssembler::target_addr_for_insn(old_addr));

  }

}

void metadata_Relocation::pd_fix_value(address x) {

}