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//===- lib/ReaderWriter/PECOFF/EdataPass.h --------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file \brief This linker pass creates atoms for the DLL export
/// information. The defined atoms constructed in this pass will go into .edata
/// section.
///
/// For the details of the .edata section format, see Microsoft PE/COFF
/// Specification section 5.3, The .edata Section.
///
//===----------------------------------------------------------------------===//
#ifndef LLD_READER_WRITER_PE_COFF_EDATA_PASS_H
#define LLD_READER_WRITER_PE_COFF_EDATA_PASS_H
#include "Atoms.h"
#include "lld/Core/File.h"
#include "lld/Core/Pass.h"
#include "lld/Core/Simple.h"
#include "lld/ReaderWriter/PECOFFLinkingContext.h"
#include "llvm/Support/COFF.h"
#include <map>
using llvm::COFF::ImportDirectoryTableEntry;
namespace lld {
namespace pecoff {
namespace edata {
struct TableEntry {
TableEntry(StringRef exp, int ord, const DefinedAtom *a, bool n)
: exportName(exp), ordinal(ord), atom(a), noname(n) {}
std::string exportName;
int ordinal;
const DefinedAtom *atom;
bool noname;
};
/// The root class of all edata atoms.
class EdataAtom : public COFFLinkerInternalAtom {
public:
EdataAtom(VirtualFile &file, size_t size)
: COFFLinkerInternalAtom(file, file.getNextOrdinal(),
std::vector<uint8_t>(size)) {}
SectionChoice sectionChoice() const override { return sectionCustomRequired; }
StringRef customSectionName() const override { return ".edata"; }
ContentType contentType() const override { return typeData; }
ContentPermissions permissions() const override { return permR__; }
template <typename T> T *getContents() const {
return (T *)const_cast<uint8_t *>(rawContent().data());
}
};
} // namespace edata
class EdataPass : public lld::Pass {
public:
EdataPass(PECOFFLinkingContext &ctx)
: _ctx(ctx), _file(ctx), _is64(ctx.is64Bit()), _stringOrdinal(1024) {}
void perform(std::unique_ptr<MutableFile> &file) override;
private:
edata::EdataAtom *
createExportDirectoryTable(const std::vector<edata::TableEntry> &namedEntries,
int ordinalBase, int maxOrdinal);
edata::EdataAtom *
createAddressTable(const std::vector<edata::TableEntry> &entries,
int ordinalBase, int maxOrdinal);
edata::EdataAtom *
createNamePointerTable(const PECOFFLinkingContext &ctx,
const std::vector<edata::TableEntry> &entries,
MutableFile *file);
edata::EdataAtom *
createOrdinalTable(const std::vector<edata::TableEntry> &entries,
int ordinalBase);
PECOFFLinkingContext &_ctx;
VirtualFile _file;
bool _is64;
int _stringOrdinal;
mutable llvm::BumpPtrAllocator _alloc;
};
} // namespace pecoff
} // namespace lld
#endif
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