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annotate graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotJumpToExceptionHandlerInCallerOp.java @ 21596:47a3d4b3ccb3

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AMD64HotSpotEpilogueOp: set rbp rescue location on construction.
author Josef Eisl <josef.eisl@jku.at>
date Wed, 27 May 2015 16:26:10 +0200
parents 48c1ebd24120
children 5024c80224c7
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1 /*
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2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.hotspot.amd64;
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24
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25 import com.oracle.jvmci.code.Register;
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26 import com.oracle.jvmci.meta.AllocatableValue;
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27 import static com.oracle.graal.amd64.AMD64.*;
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28 import static com.oracle.jvmci.code.ValueUtil.*;
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29 import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*;
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30
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31 import com.oracle.graal.asm.amd64.*;
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32 import com.oracle.graal.asm.amd64.AMD64Assembler.ConditionFlag;
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33 import com.oracle.graal.lir.*;
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34 import com.oracle.graal.lir.StandardOp.BlockEndOp;
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35 import com.oracle.graal.lir.asm.*;
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36
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37 /**
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38 * Sets up the arguments for an exception handler in the callers frame, removes the current frame
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39 * and jumps to the handler.
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40 */
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41 @Opcode("JUMP_TO_EXCEPTION_HANDLER_IN_CALLER")
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42 final class AMD64HotSpotJumpToExceptionHandlerInCallerOp extends AMD64HotSpotEpilogueOp implements BlockEndOp {
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43
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44 public static final LIRInstructionClass<AMD64HotSpotJumpToExceptionHandlerInCallerOp> TYPE = LIRInstructionClass.create(AMD64HotSpotJumpToExceptionHandlerInCallerOp.class);
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45
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46 @Use(REG) AllocatableValue handlerInCallerPc;
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47 @Use(REG) AllocatableValue exception;
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48 @Use(REG) AllocatableValue exceptionPc;
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49 private final Register thread;
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50 private final int isMethodHandleReturnOffset;
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51
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52 AMD64HotSpotJumpToExceptionHandlerInCallerOp(AllocatableValue handlerInCallerPc, AllocatableValue exception, AllocatableValue exceptionPc, int isMethodHandleReturnOffset, Register thread,
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53 AllocatableValue savedRbp) {
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54 super(TYPE, savedRbp);
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55 this.handlerInCallerPc = handlerInCallerPc;
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56 this.exception = exception;
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57 this.exceptionPc = exceptionPc;
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58 this.isMethodHandleReturnOffset = isMethodHandleReturnOffset;
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59 this.thread = thread;
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60 }
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61
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62 @Override
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63 public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
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64 leaveFrameAndRestoreRbp(crb, masm);
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65
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66 // Discard the return address, thus completing restoration of caller frame
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67 masm.incrementq(rsp, 8);
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68
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69 // Restore rsp from rbp if the exception PC is a method handle call site.
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70 AMD64Address dst = new AMD64Address(thread, isMethodHandleReturnOffset);
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71 masm.cmpl(dst, 0);
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72 masm.cmovq(ConditionFlag.NotEqual, rsp, rbp);
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73
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74 masm.jmp(asRegister(handlerInCallerPc));
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75 }
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76 }