1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 package jdk.tools.jaotc.binformat;
  25 
  26 public class Relocation {
  27 
  28     public enum RelocType {
  29         UNDEFINED,
  30         JAVA_CALL_INDIRECT,
  31         JAVA_CALL_DIRECT,
  32         FOREIGN_CALL_INDIRECT,
  33         FOREIGN_CALL_INDIRECT_GOT, // Call to address in GOT cell
  34         FOREIGN_CALL_DIRECT,
  35         FOREIGN_CALL_DIRECT_FAR,
  36         STUB_CALL_DIRECT,
  37         STUB_CALL_INDIRECT,
  38         EXTERNAL_DATA_REFERENCE_FAR,
  39         METASPACE_GOT_REFERENCE,
  40         EXTERNAL_GOT_TO_PLT,
  41         EXTERNAL_PLT_TO_GOT,
  42         STATIC_STUB_TO_STATIC_METHOD,
  43         STATIC_STUB_TO_HOTSPOT_LINKAGE_GOT,
  44         LOADTIME_ADDRESS
  45     }
  46 
  47     private final RelocType type;
  48 
  49     /**
  50      * Byte offset from the beginning of the file affected by relocation.
  51      */
  52     private final int offset;
  53 
  54     /**
  55      * Size of relocation.
  56      */
  57     private final int size;
  58 
  59     /**
  60      * Symbol associated with this relocation.
  61      */
  62     private final Symbol symbol;
  63 
  64     /**
  65      * Section this relocation entry modifies.
  66      */
  67     private final ByteContainer section;
  68 
  69     public Relocation(int offset, RelocType type, int size, ByteContainer section, Symbol sym) {
  70         if (sym == null) {
  71             throw new InternalError("must have symbol");
  72         }
  73         this.offset = offset;
  74         this.type = type;
  75         this.size = size;
  76         this.symbol = sym;
  77         this.section = section;
  78         section.setHasRelocations();
  79     }
  80 
  81     public RelocType getType() {
  82         return type;
  83     }
  84 
  85     public int getOffset() {
  86         return offset;
  87     }
  88 
  89     public int getSize() {
  90         return size;
  91     }
  92 
  93     public Symbol getSymbol() {
  94         return symbol;
  95     }
  96 
  97     public ByteContainer getSection() {
  98         return section;
  99     }
 100 
 101 }