1 /* 2 * Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2012, 2013 SAP SE. 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/assembler.hpp" 28 #include "assembler_ppc.inline.hpp" 29 #include "code/icBuffer.hpp" 30 #include "gc/shared/collectedHeap.inline.hpp" 31 #include "interpreter/bytecodes.hpp" 32 #include "memory/resourceArea.hpp" 33 #include "nativeInst_ppc.hpp" 34 #include "oops/oop.inline.hpp" 35 36 #define __ masm. 37 38 int InlineCacheBuffer::ic_stub_code_size() { 39 return MacroAssembler::load_const_size + MacroAssembler::b64_patchable_size; 40 } 41 42 void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point) { 43 ResourceMark rm; 44 CodeBuffer code(code_begin, ic_stub_code_size()); 45 MacroAssembler masm(&code); 46 // Note: even though the code contains an embedded metadata, we do not need reloc info 47 // because 48 // (1) the metadata is old (i.e., doesn't matter for scavenges) 49 // (2) these ICStubs are removed *before* a GC happens, so the roots disappear. 50 51 // Load the oop ... 52 __ load_const(R19_method, (address) cached_value, R0); 53 // ... and jump to entry point. 54 __ b64_patchable((address) entry_point, relocInfo::none); 55 56 __ flush(); 57 } 58 59 address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) { 60 NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object 61 NativeJump* jump = nativeJump_at(move->next_instruction_address()); 62 return jump->jump_destination(); 63 } 64 65 void* InlineCacheBuffer::ic_buffer_cached_value(address code_begin) { 66 NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object 67 void* o = (void*)move->data(); 68 return o; 69 } 70