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annotate graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotUnwindOp.java @ 10853:22baf2a69f6d

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Reuse linkage.
author twisti
date Mon, 22 Jul 2013 21:43:31 -0700
parents fbeda9df497d
children 886c2df7a7e4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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3d41998c30de Create new way of handling unwind that recalculates rbp from rsp. Remove unused instanceof slow path stub.
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1 /*
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2 * Copyright (c) 2012, 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
3d41998c30de Create new way of handling unwind that recalculates rbp from rsp. Remove unused instanceof slow path stub.
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
3d41998c30de Create new way of handling unwind that recalculates rbp from rsp. Remove unused instanceof slow path stub.
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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
3d41998c30de Create new way of handling unwind that recalculates rbp from rsp. Remove unused instanceof slow path stub.
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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
3d41998c30de Create new way of handling unwind that recalculates rbp from rsp. Remove unused instanceof slow path stub.
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16 * 2 along with this work; if not, write to the Free Software Foundation,
3d41998c30de Create new way of handling unwind that recalculates rbp from rsp. Remove unused instanceof slow path stub.
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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
3d41998c30de Create new way of handling unwind that recalculates rbp from rsp. Remove unused instanceof slow path stub.
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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 static com.oracle.graal.amd64.AMD64.*;
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26 import static com.oracle.graal.api.code.ValueUtil.*;
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27 import static com.oracle.graal.hotspot.HotSpotBackend.*;
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28 import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*;
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29
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30 import com.oracle.graal.api.code.*;
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31 import com.oracle.graal.asm.amd64.*;
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32 import com.oracle.graal.hotspot.stubs.*;
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33 import com.oracle.graal.lir.*;
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34 import com.oracle.graal.lir.amd64.*;
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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 * Removes the current frame and jumps to the {@link UnwindExceptionToCallerStub}.
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3d41998c30de Create new way of handling unwind that recalculates rbp from rsp. Remove unused instanceof slow path stub.
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39 */
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40 @Opcode("UNWIND")
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41 final class AMD64HotSpotUnwindOp extends AMD64HotSpotEpilogueOp {
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42
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43 @Use({REG}) protected RegisterValue exception;
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44
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45 AMD64HotSpotUnwindOp(RegisterValue exception) {
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46 this.exception = exception;
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47 }
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49 @Override
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50 public void emitCode(TargetMethodAssembler tasm, AMD64MacroAssembler masm) {
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51 leaveFrameAndRestoreRbp(tasm, masm);
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52
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53 ForeignCallLinkage linkage = tasm.runtime.lookupForeignCall(UNWIND_EXCEPTION_TO_CALLER);
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54 CallingConvention cc = linkage.getCallingConvention();
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55 assert cc.getArgumentCount() == 2;
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56 assert exception.equals(cc.getArgument(0));
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57
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58 // Get return address (is on top of stack after leave).
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59 Register returnAddress = asRegister(cc.getArgument(1));
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60 masm.movq(returnAddress, new AMD64Address(rsp, 0));
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61
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62 AMD64Call.directJmp(tasm, masm, linkage);
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63 }
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64 }