| /* |
| * Copyright (c) 2016, 2017, 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 jdk.tools.jaotc; |
| |
| import jdk.tools.jaotc.binformat.BinaryContainer; |
| import jdk.tools.jaotc.binformat.ByteContainer; |
| import jdk.tools.jaotc.binformat.CodeContainer; |
| import jdk.tools.jaotc.binformat.Relocation; |
| import jdk.tools.jaotc.binformat.Relocation.RelocType; |
| import jdk.tools.jaotc.binformat.Symbol; |
| import jdk.tools.jaotc.binformat.Symbol.Binding; |
| import jdk.tools.jaotc.binformat.Symbol.Kind; |
| |
| /** |
| * Describes a relocation symbol of a call site. That is, WHERE to do a relocation. |
| */ |
| abstract class CallSiteRelocationSymbol { |
| |
| final Symbol symbol; |
| |
| CallSiteRelocationSymbol(Symbol symbol) { |
| assert symbol != null; |
| this.symbol = symbol; |
| } |
| |
| protected static Symbol createCodeContainerSymbol(BinaryContainer binaryContainer, String symbolName, int symbolOffset) { |
| return binaryContainer.getCodeContainer().createSymbol(symbolOffset, Kind.OBJECT, Binding.LOCAL, 0, symbolName); |
| } |
| |
| protected static void addCodeContainerRelocation(BinaryContainer binaryContainer, String symbolName, int symbolOffset, int relocationOffset) { |
| Symbol symbol = createCodeContainerSymbol(binaryContainer, symbolName, symbolOffset); |
| addExternalGotToPltRelocation(binaryContainer, symbol, relocationOffset); |
| } |
| |
| protected static void addExtLinkageGotContainerRelocation(BinaryContainer binaryContainer, String symbolName, int symbolOffset, int relocationOffset) { |
| ByteContainer container = binaryContainer.getExtLinkageGOTContainer(); |
| Symbol symbol = container.createGotSymbol(symbolOffset, symbolName); |
| addExternalPltToGotRelocation(binaryContainer, symbol, relocationOffset); |
| } |
| |
| /** |
| * Add an {@link RelocType#EXTERNAL_GOT_TO_PLT} relocation to the |
| * {@link BinaryContainer#getExtLinkageGOTContainer()}. |
| */ |
| private static void addExternalGotToPltRelocation(BinaryContainer binaryContainer, Symbol symbol, int relocationOffset) { |
| ByteContainer container = binaryContainer.getExtLinkageGOTContainer(); |
| Relocation relocation = new Relocation(relocationOffset, RelocType.EXTERNAL_GOT_TO_PLT, 8, container, symbol); |
| binaryContainer.addRelocation(relocation); |
| } |
| |
| /** |
| * Add an {@link RelocType#EXTERNAL_PLT_TO_GOT} relocation to the |
| * {@link BinaryContainer#getCodeContainer()}. |
| */ |
| protected static void addExternalPltToGotRelocation(BinaryContainer binaryContainer, Symbol symbol, int relocationOffset) { |
| CodeContainer container = binaryContainer.getCodeContainer(); |
| Relocation relocation = new Relocation(relocationOffset, RelocType.EXTERNAL_PLT_TO_GOT, 8, container, symbol); |
| binaryContainer.addRelocation(relocation); |
| } |
| |
| } |