duke@435: /*
duke@435:  * Copyright 1997-2006 Sun Microsystems, Inc.  All Rights Reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
duke@435:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435:  * CA 95054 USA or visit www.sun.com if you need additional information or
duke@435:  * have any questions.
duke@435:  *
duke@435:  */
duke@435: 
duke@435: #include "incls/_precompiled.incl"
duke@435: #include "incls/_icBuffer_x86.cpp.incl"
duke@435: 
duke@435: int InlineCacheBuffer::ic_stub_code_size() {
duke@435:   return NativeMovConstReg::instruction_size +
duke@435:          NativeJump::instruction_size +
duke@435:          1;
duke@435:   // so that code_end can be set in CodeBuffer
duke@435:   // 64bit 16 = 5 + 10 bytes + 1 byte
duke@435:   // 32bit 11 = 10 bytes + 1 byte
duke@435: }
duke@435: 
duke@435: 
duke@435: 
duke@435: void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, oop cached_oop, address entry_point) {
duke@435:   ResourceMark rm;
duke@435:   CodeBuffer      code(code_begin, ic_stub_code_size());
duke@435:   MacroAssembler* masm            = new MacroAssembler(&code);
duke@435:   // note: even though the code contains an embedded oop, we do not need reloc info
duke@435:   // because
duke@435:   // (1) the oop is old (i.e., doesn't matter for scavenges)
duke@435:   // (2) these ICStubs are removed *before* a GC happens, so the roots disappear
duke@435:   assert(cached_oop == NULL || cached_oop->is_perm(), "must be perm oop");
duke@435:   masm->lea(rax, OopAddress((address) cached_oop));
duke@435:   masm->jump(ExternalAddress(entry_point));
duke@435: }
duke@435: 
duke@435: 
duke@435: address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) {
duke@435:   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);   // creation also verifies the object
duke@435:   NativeJump*        jump = nativeJump_at(move->next_instruction_address());
duke@435:   return jump->jump_destination();
duke@435: }
duke@435: 
duke@435: 
duke@435: oop InlineCacheBuffer::ic_buffer_cached_oop(address code_begin) {
duke@435:   // creation also verifies the object
duke@435:   NativeMovConstReg* move = nativeMovConstReg_at(code_begin);
duke@435:   // Verifies the jump
duke@435:   NativeJump*        jump = nativeJump_at(move->next_instruction_address());
duke@435:   return (oop)move->data();
duke@435: }