/*
* Copyright (c) 2007, 2011, 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.
*
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*/
package com.sun.max.vm.runtime.amd64;
import static com.sun.max.platform.Platform.*;
import com.oracle.max.asm.target.amd64.*;
import com.sun.cri.ci.*;
import com.sun.max.annotate.*;
import com.sun.max.vm.compiler.*;
import com.sun.max.vm.runtime.*;
/**
* The safepoint poll implementation for AMD64.
*
* @see AMD64TrapFrameAccess
*/
public final class AMD64SafepointPoll extends SafepointPoll {
/**
* ATTENTION: must be callee-saved by all C ABIs in use.
*/
public static final CiRegister LATCH_REGISTER = AMD64.r14;
@HOSTED_ONLY
public AMD64SafepointPoll() {
}
@HOSTED_ONLY
@Override
protected byte[] createCode() {
final AMD64Assembler asm = new AMD64Assembler(target(), null);
asm.movq(LATCH_REGISTER, new CiAddress(WordUtil.archKind(), LATCH_REGISTER.asValue()));
return asm.codeBuffer.close(true);
}
}