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 __