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view graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64Call.java @ 5880:afd2508528f5
The targetAdress should be moved to a fixed register for indirect call. Fix from Christian Wimmer
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Tue, 07 Aug 2012 11:13:17 -0700 |
parents | a432e6d43aa1 |
children | 64d6e2343a68 |
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/* * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.lir.amd64; import static com.oracle.graal.api.code.ValueUtil.*; import static com.oracle.graal.lir.LIRInstruction.OperandFlag.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.lir.*; import com.oracle.graal.lir.LIRInstruction.Opcode; import com.oracle.graal.lir.asm.*; import com.oracle.graal.lir.asm.TargetMethodAssembler.CallPositionListener; import com.oracle.max.asm.target.amd64.*; public class AMD64Call { @Opcode("CALL_DIRECT") public static class DirectCallOp extends AMD64LIRInstruction implements StandardOp.CallOp { @Def({REG, ILLEGAL}) protected Value result; @Use({REG, STACK}) protected Value[] parameters; @State protected LIRFrameState state; protected final Object targetMethod; protected final CallPositionListener callPositionListener; public DirectCallOp(Object targetMethod, Value result, Value[] parameters, LIRFrameState state, CallPositionListener callPositionListener) { this.targetMethod = targetMethod; this.result = result; this.parameters = parameters; this.state = state; this.callPositionListener = callPositionListener; } @Override public void emitCode(TargetMethodAssembler tasm, AMD64MacroAssembler masm) { if (callPositionListener != null) { callPositionListener.beforeCall(tasm); } emitAlignmentForDirectCall(tasm, masm); if (callPositionListener != null) { int pos = masm.codeBuffer.position(); callPositionListener.atCall(tasm); assert pos == masm.codeBuffer.position() : "call position listener inserted code before an aligned call"; } directCall(tasm, masm, targetMethod, state); } protected void emitAlignmentForDirectCall(TargetMethodAssembler tasm, AMD64MacroAssembler masm) { // make sure that the displacement word of the call ends up word aligned int offset = masm.codeBuffer.position(); offset += tasm.target.arch.machineCodeCallDisplacementOffset; while (offset++ % tasm.target.wordSize != 0) { masm.nop(); } } } @Opcode("CALL_INDIRECT") public static class IndirectCallOp extends AMD64LIRInstruction implements StandardOp.CallOp { @Def({REG, ILLEGAL}) protected Value result; @Use({REG, STACK}) protected Value[] parameters; @Use({REG}) protected Value targetAddress; @State protected LIRFrameState state; protected final Object targetMethod; protected final CallPositionListener callPositionListener; public IndirectCallOp(Object targetMethod, Value result, Value[] parameters, Value targetAddress, LIRFrameState state, CallPositionListener callPositionListener) { this.targetMethod = targetMethod; this.result = result; this.parameters = parameters; this.targetAddress = targetAddress; this.state = state; this.callPositionListener = callPositionListener; } @Override public void emitCode(TargetMethodAssembler tasm, AMD64MacroAssembler masm) { if (callPositionListener != null) { callPositionListener.beforeCall(tasm); callPositionListener.atCall(tasm); } indirectCall(tasm, masm, asRegister(targetAddress), targetMethod, state); } @Override protected void verify() { super.verify(); assert isRegister(targetAddress) : "The current register allocator cannot handle variables to be used at call sites, it must be in a fixed register for now"; } } public static void directCall(TargetMethodAssembler tasm, AMD64MacroAssembler masm, Object target, LIRFrameState info) { int before = masm.codeBuffer.position(); if (target instanceof RuntimeCall) { long maxOffset = tasm.runtime.getMaxCallTargetOffset((RuntimeCall) target); if (maxOffset != (int) maxOffset) { // offset might not fit a 32-bit immediate, generate an // indirect call with a 64-bit immediate Register scratch = tasm.frameMap.registerConfig.getScratchRegister(); // TODO (cwimmer): we want to get rid of a generally reserved scratch register. masm.movq(scratch, 0L); masm.call(scratch); } else { masm.call(); } } else { masm.call(); } int after = masm.codeBuffer.position(); tasm.recordDirectCall(before, after, tasm.runtime.asCallTarget(target), info); tasm.recordExceptionHandlers(after, info); masm.ensureUniquePC(); } public static void directJmp(TargetMethodAssembler tasm, AMD64MacroAssembler masm, Object target) { int before = masm.codeBuffer.position(); masm.jmp(0, true); int after = masm.codeBuffer.position(); tasm.recordDirectCall(before, after, tasm.runtime.asCallTarget(target), null); masm.ensureUniquePC(); } public static void indirectCall(TargetMethodAssembler tasm, AMD64MacroAssembler masm, Register dst, Object target, LIRFrameState info) { int before = masm.codeBuffer.position(); masm.call(dst); int after = masm.codeBuffer.position(); tasm.recordIndirectCall(before, after, tasm.runtime.asCallTarget(target), info); tasm.recordExceptionHandlers(after, info); masm.ensureUniquePC(); } public static void shouldNotReachHere(TargetMethodAssembler tasm, AMD64MacroAssembler masm) { boolean assertions = false; assert (assertions = true) == true; if (assertions) { directCall(tasm, masm, RuntimeCall.Debug, null); masm.hlt(); } } }