1 /*
   2  * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #include "precompiled.hpp"
  27 #include "asm/macroAssembler.hpp"
  28 #include "code/relocInfo.hpp"
  29 #include "nativeInst_aarch64.hpp"
  30 #include "oops/oop.inline.hpp"
  31 #include "runtime/safepoint.hpp"
  32 
  33 
  34 void Relocation::pd_set_data_value(address x, intptr_t o, bool verify_only) {
  35   if (verify_only)
  36     return;
  37 
  38   int bytes;
  39 
  40   switch(type()) {
  41   case relocInfo::oop_type:
  42     {
  43       oop_Relocation *reloc = (oop_Relocation *)this;
  44       if (NativeInstruction::is_ldr_literal_at(addr())) {
  45         address constptr = (address)code()->oop_addr_at(reloc->oop_index());
  46         bytes = MacroAssembler::pd_patch_instruction_size(addr(), constptr);
  47         assert(*(address*)constptr == x, "error in oop relocation");
  48       } else{
  49         bytes = MacroAssembler::patch_oop(addr(), x);
  50       }
  51     }
  52     break;
  53   default:
  54     bytes = MacroAssembler::pd_patch_instruction_size(addr(), x);
  55     break;
  56   }
  57   ICache::invalidate_range(addr(), bytes);
  58 }
  59 
  60 address Relocation::pd_call_destination(address orig_addr) {
  61   assert(is_call(), "should be a call here");
  62   if (is_call()) {
  63     address trampoline = nativeCall_at(addr())->get_trampoline();
  64     if (trampoline) {
  65       return nativeCallTrampolineStub_at(trampoline)->destination();
  66     }
  67   }
  68   if (orig_addr != NULL) {
  69     return MacroAssembler::pd_call_destination(orig_addr);
  70   }
  71   return MacroAssembler::pd_call_destination(addr());
  72 }
  73 
  74 
  75 void Relocation::pd_set_call_destination(address x) {
  76   assert(is_call(), "should be a call here");
  77   if (NativeCall::is_call_at(addr())) {
  78     address trampoline = nativeCall_at(addr())->get_trampoline();
  79     if (trampoline) {
  80       nativeCall_at(addr())->set_destination_mt_safe(x, /* assert_lock */false);
  81       return;
  82     }
  83   }
  84   assert(addr() != x, "call instruction in an infinite loop");
  85   MacroAssembler::pd_patch_instruction(addr(), x);
  86   assert(pd_call_destination(addr()) == x, "fail in reloc");
  87 }
  88 
  89 address* Relocation::pd_address_in_code() {
  90   return (address*)(addr() + 8);
  91 }
  92 
  93 
  94 address Relocation::pd_get_address_from_code() {
  95   return MacroAssembler::pd_call_destination(addr());
  96 }
  97 
  98 void poll_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
  99   if (NativeInstruction::maybe_cpool_ref(addr())) {
 100     address old_addr = old_addr_for(addr(), src, dest);
 101     MacroAssembler::pd_patch_instruction(addr(), MacroAssembler::target_addr_for_insn(old_addr));
 102   }
 103 }
 104 
 105 void poll_return_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest)  {
 106   if (NativeInstruction::maybe_cpool_ref(addr())) {
 107     address old_addr = old_addr_for(addr(), src, dest);
 108     MacroAssembler::pd_patch_instruction(addr(), MacroAssembler::target_addr_for_insn(old_addr));
 109   }
 110 }
 111 
 112 void metadata_Relocation::pd_fix_value(address x) {
 113 }