1 /*
   2  * Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "asm/assembler.hpp"
  27 #include "assembler_arm.inline.hpp"
  28 #include "code/icBuffer.hpp"
  29 #include "gc/shared/collectedHeap.inline.hpp"
  30 #include "interpreter/bytecodes.hpp"
  31 #include "memory/resourceArea.hpp"
  32 #include "nativeInst_arm.hpp"
  33 #include "oops/oop.inline.hpp"
  34 
  35 #define __ masm->
  36 
  37 int InlineCacheBuffer::ic_stub_code_size() {
  38   return (AARCH64_ONLY(8) NOT_AARCH64(4)) * Assembler::InstructionSize;
  39 }
  40 
  41 void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point) {
  42   ResourceMark rm;
  43   CodeBuffer code(code_begin, ic_stub_code_size());
  44   MacroAssembler* masm = new MacroAssembler(&code);
  45 
  46   InlinedAddress oop_literal((address) cached_value);
  47   __ ldr_literal(Ricklass, oop_literal);
  48   // FIXME: OK to remove reloc here?
  49   __ patchable_jump(entry_point, relocInfo::runtime_call_type, Rtemp);
  50   __ bind_literal(oop_literal);
  51   __ flush();
  52 }
  53 
  54 address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) {
  55   address jump_address;
  56   jump_address = code_begin + NativeInstruction::instruction_size;
  57   NativeJump* jump = nativeJump_at(jump_address);
  58   return jump->jump_destination();
  59 }
  60 
  61 void* InlineCacheBuffer::ic_buffer_cached_value(address code_begin) {
  62   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);
  63   return (void*)move->data();
  64 }
  65 
  66 #undef __