jdk

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/*
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 * Copyright (c) 1998, 2024, Oracle and/or its affiliates. All rights reserved.
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 * Copyright (c) 2014, Red Hat Inc. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "asm/macroAssembler.hpp"
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#include "code/nmethod.hpp"
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#include "code/relocInfo.hpp"
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#include "nativeInst_aarch64.hpp"
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#include "oops/oop.inline.hpp"
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#include "runtime/safepoint.hpp"
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void Relocation::pd_set_data_value(address x, bool verify_only) {
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  if (verify_only)
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    return;
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  int bytes;
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  switch(type()) {
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  case relocInfo::oop_type:
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    {
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      oop_Relocation *reloc = (oop_Relocation *)this;
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      if (NativeInstruction::is_ldr_literal_at(addr())) {
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        address constptr = (address)code()->oop_addr_at(reloc->oop_index());
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        bytes = MacroAssembler::pd_patch_instruction_size(addr(), constptr);
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        assert(*(address*)constptr == x, "error in oop relocation");
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      } else{
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        bytes = MacroAssembler::patch_oop(addr(), x);
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      }
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    }
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    break;
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  default:
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    bytes = MacroAssembler::pd_patch_instruction_size(addr(), x);
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    break;
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  }
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  ICache::invalidate_range(addr(), bytes);
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}
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address Relocation::pd_call_destination(address orig_addr) {
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  assert(is_call(), "should be a call here");
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  if (orig_addr == nullptr) {
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    if (NativeCall::is_call_at(addr())) {
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      NativeCall* call = nativeCall_at(addr());
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      return call->destination();
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    }
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  } else {
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    address new_addr = MacroAssembler::pd_call_destination(orig_addr);
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    // If call is branch to self, don't try to relocate it, just leave it
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    // as branch to self. This happens during code generation if the code
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    // buffer expands. It will be relocated to the trampoline above once
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    // code generation is complete.
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    new_addr = (new_addr == orig_addr) ? addr() : new_addr;
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    return new_addr;
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  }
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  return MacroAssembler::pd_call_destination(addr());
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}
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void Relocation::pd_set_call_destination(address x) {
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  assert(is_call(), "should be a call here");
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  if (NativeCall::is_call_at(addr())) {
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    NativeCall* call = nativeCall_at(addr());
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    call->set_destination(x);
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  } else {
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    MacroAssembler::pd_patch_instruction(addr(), x);
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  }
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  assert(pd_call_destination(addr()) == x, "fail in reloc");
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}
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void trampoline_stub_Relocation::pd_fix_owner_after_move() {
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  NativeCall* call = nativeCall_at(owner());
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  assert(call->raw_destination() == owner(), "destination should be empty");
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  address trampoline = addr();
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  address dest = nativeCallTrampolineStub_at(trampoline)->destination();
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  if (!Assembler::reachable_from_branch_at(owner(), dest)) {
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    dest = trampoline;
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  }
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  call->set_destination(dest);
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}
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address* Relocation::pd_address_in_code() {
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  return (address*)(addr() + 8);
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}
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address Relocation::pd_get_address_from_code() {
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  return MacroAssembler::pd_call_destination(addr());
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}
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void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
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  if (NativeInstruction::maybe_cpool_ref(addr())) {
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    address old_addr = old_addr_for(addr(), src, dest);
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    MacroAssembler::pd_patch_instruction(addr(), MacroAssembler::target_addr_for_insn(old_addr));
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  }
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}
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void metadata_Relocation::pd_fix_value(address x) {
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}
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