001/*
002 *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003 *
004 *  This file is licensed to You under the Eclipse Public License (EPL);
005 *  You may not use this file except in compliance with the License. You
006 *  may obtain a copy of the License at
007 *
008 *      http://www.opensource.org/licenses/eclipse-1.0.php
009 *
010 *  See the COPYRIGHT.txt file distributed with this work for information
011 *  regarding copyright ownership.
012 */
013package org.vmmagic.pragma;
014
015import java.lang.annotation.Retention;
016import java.lang.annotation.RetentionPolicy;
017import java.lang.annotation.Target;
018import java.lang.annotation.ElementType;
019import org.vmmagic.Pragma;
020
021/**
022 * Methods of a class that implements this interface are treated specially
023 * by the compilers.
024 *
025 * <p>Instead of saving just the non-volatile registers used by the method into
026 * the register save area of the method's stackframe, the compiler generates
027 * code to save *all* GPR and FPR registers except GPR0, FPR0, JTOC, and FP.
028 *
029 * <p>Methods of a class that implement this interface may not return.
030 *    (it is assumed that execution is resumed via a call to Magic.dynamicBridgeTo)
031 *
032 * @see org.jikesrvm.runtime.Magic#dynamicBridgeTo(org.jikesrvm.compilers.common.CodeArray)
033 */
034@Retention(RetentionPolicy.RUNTIME)
035@Target(ElementType.TYPE)
036@Pragma
037public @interface DynamicBridge { }