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     */
013    package org.vmmagic.pragma;
014    
015    import java.lang.annotation.Retention;
016    import java.lang.annotation.RetentionPolicy;
017    import java.lang.annotation.Target;
018    import java.lang.annotation.ElementType;
019    import 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.ArchitectureSpecific.CodeArray)
033     */
034    @Retention(RetentionPolicy.RUNTIME)
035    @Target(ElementType.TYPE)
036    @Pragma
037    public @interface DynamicBridge { }