XCOFFLinkGraphBuilder.h

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//===----- XCOFFLinkGraphBuilder.h - XCOFF LinkGraph builder ----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Generic XCOFF LinkGraph building code.
//
//===----------------------------------------------------------------------===//
 
#ifndef LIB_EXECUTIONENGINE_JITLINK_XCOFFLINKGRAPHBUILDER_H
#define LIB_EXECUTIONENGINE_JITLINK_XCOFFLINKGRAPHBUILDER_H
 
#include "llvm/ExecutionEngine/JITLink/JITLink.h"
#include "llvm/ExecutionEngine/Orc/SymbolStringPool.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/XCOFFObjectFile.h"
#include "llvm/TargetParser/SubtargetFeature.h"
#include <memory>
 
namespace llvm {
namespace jitlink {
 
class XCOFFLinkGraphBuilder {
public:
  virtual ~XCOFFLinkGraphBuilder() = default;
  Expected<std::unique_ptr<LinkGraph>> buildGraph();
 
public:
  XCOFFLinkGraphBuilder(const object::XCOFFObjectFile &Obj,
                        std::shared_ptr<orc::SymbolStringPool> SSP, Triple TT,
                        SubtargetFeatures Features,
                        LinkGraph::GetEdgeKindNameFunction GetEdgeKindName);
  LinkGraph &getGraph() const { return *G; }
  const object::XCOFFObjectFile &getObject() const { return Obj; }
 
private:
  Error processSections();
  Error processCsectsAndSymbols();
  Error processRelocations();
 
private:
  const object::XCOFFObjectFile &Obj;
  std::unique_ptr<LinkGraph> G;
 
  Section *UndefSection;
 
  struct SectionEntry {
    jitlink::Section *Section;
    object::SectionRef SectionData;
  };
 
  DenseMap<uint16_t, SectionEntry> SectionTable;
  DenseMap<uint32_t, Block *> CsectTable;
  DenseMap<uint32_t, Symbol *> SymbolIndexTable;
};
 
} // namespace jitlink
} // namespace llvm
 
#endif // LIB_EXECUTIONENGINE_JITLINK_XCOFFLINKGRAPHBUILDER_H