105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
//===- lib/Core/LinkingContext.cpp - Linker Context Object Interface ------===//
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//
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// The LLVM Linker
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lld/Core/Alias.h"
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#include "lld/Core/LinkingContext.h"
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#include "lld/Core/Resolver.h"
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#include "lld/Core/Simple.h"
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#include "lld/Core/Writer.h"
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#include "llvm/ADT/Triple.h"
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namespace lld {
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LinkingContext::LinkingContext()
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: _deadStrip(false), _allowDuplicates(false),
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_globalsAreDeadStripRoots(false),
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_searchArchivesToOverrideTentativeDefinitions(false),
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_searchSharedLibrariesToOverrideTentativeDefinitions(false),
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_warnIfCoalesableAtomsHaveDifferentCanBeNull(false),
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_warnIfCoalesableAtomsHaveDifferentLoadName(false),
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_printRemainingUndefines(true), _allowRemainingUndefines(false),
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_logInputFiles(false), _allowShlibUndefines(true),
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_outputFileType(OutputFileType::Default), _nextOrdinal(0) {}
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LinkingContext::~LinkingContext() {}
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bool LinkingContext::validate(raw_ostream &diagnostics) {
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return validateImpl(diagnostics);
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}
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std::error_code LinkingContext::writeFile(const File &linkedFile) const {
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return this->writer().writeFile(linkedFile, _outputPath);
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}
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void LinkingContext::createImplicitFiles(
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std::vector<std::unique_ptr<File>> &result) {
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this->writer().createImplicitFiles(result);
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}
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std::unique_ptr<File> LinkingContext::createEntrySymbolFile() const {
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return createEntrySymbolFile("<command line option -e>");
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}
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std::unique_ptr<File>
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LinkingContext::createEntrySymbolFile(StringRef filename) const {
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if (entrySymbolName().empty())
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return nullptr;
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std::unique_ptr<SimpleFile> entryFile(new SimpleFile(filename));
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entryFile->addAtom(
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*(new (_allocator) SimpleUndefinedAtom(*entryFile, entrySymbolName())));
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return std::move(entryFile);
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}
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std::unique_ptr<File> LinkingContext::createUndefinedSymbolFile() const {
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return createUndefinedSymbolFile("<command line option -u or --defsym>");
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}
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std::unique_ptr<File>
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LinkingContext::createUndefinedSymbolFile(StringRef filename) const {
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if (_initialUndefinedSymbols.empty())
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return nullptr;
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std::unique_ptr<SimpleFile> undefinedSymFile(new SimpleFile(filename));
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for (StringRef undefSym : _initialUndefinedSymbols)
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undefinedSymFile->addAtom(*(new (_allocator) SimpleUndefinedAtom(
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*undefinedSymFile, undefSym)));
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return std::move(undefinedSymFile);
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}
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std::unique_ptr<File> LinkingContext::createAliasSymbolFile() const {
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if (getAliases().empty())
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return nullptr;
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std::unique_ptr<SimpleFile> file(new SimpleFile("<alias>"));
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for (const auto &i : getAliases()) {
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StringRef from = i.first;
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StringRef to = i.second;
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SimpleDefinedAtom *fromAtom = new (_allocator) AliasAtom(*file, from);
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UndefinedAtom *toAtom = new (_allocator) SimpleUndefinedAtom(*file, to);
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fromAtom->addReference(Reference::KindNamespace::all,
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Reference::KindArch::all, Reference::kindLayoutAfter,
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0, toAtom, 0);
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file->addAtom(*fromAtom);
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file->addAtom(*toAtom);
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}
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return std::move(file);
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}
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void LinkingContext::createInternalFiles(
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std::vector<std::unique_ptr<File> > &result) const {
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if (std::unique_ptr<File> file = createEntrySymbolFile())
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result.push_back(std::move(file));
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if (std::unique_ptr<File> file = createUndefinedSymbolFile())
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result.push_back(std::move(file));
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if (std::unique_ptr<File> file = createAliasSymbolFile())
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result.push_back(std::move(file));
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}
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void LinkingContext::addPasses(PassManager &pm) {}
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} // end namespace lld
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