1 /*
2 * Copyright (c) 2013, 2015, 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 package org.graalvm.compiler.hotspot.amd64;
24
25 import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.REG;
26 import static jdk.vm.ci.amd64.AMD64.rax;
27 import static jdk.vm.ci.amd64.AMD64.rbp;
28 import static jdk.vm.ci.amd64.AMD64.rip;
29 import static jdk.vm.ci.code.ValueUtil.asRegister;
30
31 import org.graalvm.compiler.asm.amd64.AMD64Address;
32 import org.graalvm.compiler.asm.amd64.AMD64MacroAssembler;
33 import org.graalvm.compiler.hotspot.HotSpotBackend;
34 import org.graalvm.compiler.lir.LIRInstructionClass;
35 import org.graalvm.compiler.lir.Opcode;
36 import org.graalvm.compiler.lir.StandardOp.SaveRegistersOp;
37 import org.graalvm.compiler.lir.amd64.AMD64LIRInstruction;
38 import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
39 import org.graalvm.compiler.lir.framemap.FrameMap;
40
41 import jdk.vm.ci.code.Register;
42 import jdk.vm.ci.code.RegisterConfig;
43 import jdk.vm.ci.code.RegisterSaveLayout;
44 import jdk.vm.ci.meta.AllocatableValue;
45 import jdk.vm.ci.meta.JavaKind;
46
47 /**
48 * Emits code that enters a stack frame which is tailored to call the C++ method
49 * {@link HotSpotBackend#UNPACK_FRAMES Deoptimization::unpack_frames}.
50 */
51 @Opcode("ENTER_UNPACK_FRAMES_STACK_FRAME")
52 final class AMD64HotSpotEnterUnpackFramesStackFrameOp extends AMD64LIRInstruction {
53 public static final LIRInstructionClass<AMD64HotSpotEnterUnpackFramesStackFrameOp> TYPE = LIRInstructionClass.create(AMD64HotSpotEnterUnpackFramesStackFrameOp.class);
54
55 private final Register threadRegister;
56 private final int threadLastJavaSpOffset;
57 private final int threadLastJavaPcOffset;
58 private final int threadLastJavaFpOffset;
59 @Alive(REG) AllocatableValue framePc;
60 @Alive(REG) AllocatableValue senderSp;
61 @Alive(REG) AllocatableValue senderFp;
62
63 private final SaveRegistersOp saveRegisterOp;
64
65 AMD64HotSpotEnterUnpackFramesStackFrameOp(Register threadRegister, int threadLastJavaSpOffset, int threadLastJavaPcOffset, int threadLastJavaFpOffset, AllocatableValue framePc,
66 AllocatableValue senderSp, AllocatableValue senderFp, SaveRegistersOp saveRegisterOp) {
67 super(TYPE);
68 this.threadRegister = threadRegister;
69 this.threadLastJavaSpOffset = threadLastJavaSpOffset;
70 this.threadLastJavaPcOffset = threadLastJavaPcOffset;
71 this.threadLastJavaFpOffset = threadLastJavaFpOffset;
72 this.framePc = framePc;
73 this.senderSp = senderSp;
74 this.senderFp = senderFp;
75 this.saveRegisterOp = saveRegisterOp;
76 }
77
78 @Override
79 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
80 FrameMap frameMap = crb.frameMap;
81 RegisterConfig registerConfig = frameMap.getRegisterConfig();
82 RegisterSaveLayout registerSaveLayout = saveRegisterOp.getMap(frameMap);
83 Register stackPointerRegister = registerConfig.getFrameRegister();
84 final int totalFrameSize = frameMap.totalFrameSize();
85
86 // Push return address.
87 masm.push(asRegister(framePc));
88
89 // Push base pointer.
90 masm.push(asRegister(senderFp));
91 masm.movq(rbp, stackPointerRegister);
92
93 /*
94 * Allocate a full sized frame. Since return address and base pointer are already in place
95 * (see above) we allocate two words less.
96 */
97 masm.decrementq(stackPointerRegister, totalFrameSize - 2 * crb.target.wordSize);
98
99 // Save return registers after moving the frame.
100 final int stackSlotSize = frameMap.getTarget().wordSize;
101 Register integerResultRegister = registerConfig.getReturnRegister(JavaKind.Long);
102 masm.movptr(new AMD64Address(stackPointerRegister, registerSaveLayout.registerToSlot(integerResultRegister) * stackSlotSize), integerResultRegister);
103
104 Register floatResultRegister = registerConfig.getReturnRegister(JavaKind.Double);
105 masm.movdbl(new AMD64Address(stackPointerRegister, registerSaveLayout.registerToSlot(floatResultRegister) * stackSlotSize), floatResultRegister);
106
107 // Set up last Java values.
108 masm.movq(new AMD64Address(threadRegister, threadLastJavaSpOffset), stackPointerRegister);
109
110 /*
111 * Save the PC since it cannot easily be retrieved using the last Java SP after we aligned
112 * SP. Don't need the precise return PC here, just precise enough to point into this code
113 * blob.
114 */
115 masm.leaq(rax, new AMD64Address(rip, 0));
116 masm.movq(new AMD64Address(threadRegister, threadLastJavaPcOffset), rax);
117
118 // Use BP because the frames look interpreted now.
119 masm.movq(new AMD64Address(threadRegister, threadLastJavaFpOffset), rbp);
120
121 // Align the stack for the following unpackFrames call.
122 masm.andq(stackPointerRegister, -(crb.target.stackAlignment));
123 }
124 }