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//===- Driver.h -----------------------------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLD_COFF_DRIVER_H
#define LLD_COFF_DRIVER_H
#include "Config.h"
#include "SymbolTable.h"
#include "lld/Core/LLVM.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Object/COFF.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/StringSaver.h"
#include <memory>
#include <set>
#include <system_error>
#include <vector>
namespace lld {
namespace coff {
class LinkerDriver;
extern LinkerDriver *Driver;
using llvm::COFF::MachineTypes;
using llvm::COFF::WindowsSubsystem;
using llvm::Optional;
class InputFile;
// Entry point of the COFF linker.
bool link(llvm::ArrayRef<const char *> Args);
class ArgParser {
public:
ArgParser() : Alloc(AllocAux) {}
// Parses command line options.
ErrorOr<llvm::opt::InputArgList> parse(llvm::ArrayRef<const char *> Args);
// Concatenate LINK environment varirable and given arguments and parse them.
ErrorOr<llvm::opt::InputArgList> parseLINK(llvm::ArrayRef<const char *> Args);
// Tokenizes a given string and then parses as command line options.
ErrorOr<llvm::opt::InputArgList> parse(StringRef S) {
return parse(tokenize(S));
}
private:
std::vector<const char *> tokenize(StringRef S);
ErrorOr<std::vector<const char *>>
replaceResponseFiles(std::vector<const char *>);
llvm::BumpPtrAllocator AllocAux;
llvm::BumpPtrStringSaver Alloc;
};
class LinkerDriver {
public:
LinkerDriver() : Alloc(AllocAux) {}
bool link(llvm::ArrayRef<const char *> Args);
// Used by the resolver to parse .drectve section contents.
std::error_code parseDirectives(StringRef S);
private:
llvm::BumpPtrAllocator AllocAux;
llvm::BumpPtrStringSaver Alloc;
ArgParser Parser;
SymbolTable Symtab;
// Opens a file. Path has to be resolved already.
ErrorOr<MemoryBufferRef> openFile(StringRef Path);
// Searches a file from search paths.
Optional<StringRef> findFile(StringRef Filename);
Optional<StringRef> findLib(StringRef Filename);
StringRef doFindFile(StringRef Filename);
StringRef doFindLib(StringRef Filename);
// Parses LIB environment which contains a list of search paths.
void addLibSearchPaths();
// Library search path. The first element is always "" (current directory).
std::vector<StringRef> SearchPaths;
std::set<std::string> VisitedFiles;
Undefined *addUndefined(StringRef Sym);
StringRef mangle(StringRef Sym);
// Windows specific -- "main" is not the only main function in Windows.
// You can choose one from these four -- {w,}{WinMain,main}.
// There are four different entry point functions for them,
// {w,}{WinMain,main}CRTStartup, respectively. The linker needs to
// choose the right one depending on which "main" function is defined.
// This function looks up the symbol table and resolve corresponding
// entry point name.
StringRef findDefaultEntry();
WindowsSubsystem inferSubsystem();
// Driver is the owner of all opened files.
// InputFiles have MemoryBufferRefs to them.
std::vector<std::unique_ptr<MemoryBuffer>> OwningMBs;
};
std::error_code parseModuleDefs(MemoryBufferRef MB);
std::error_code writeImportLibrary();
// Functions below this line are defined in DriverUtils.cpp.
void printHelp(const char *Argv0);
// For /machine option.
ErrorOr<MachineTypes> getMachineType(StringRef Arg);
StringRef machineTypeToStr(MachineTypes MT);
// Parses a string in the form of "<integer>[,<integer>]".
std::error_code parseNumbers(StringRef Arg, uint64_t *Addr,
uint64_t *Size = nullptr);
// Parses a string in the form of "<integer>[.<integer>]".
// Minor's default value is 0.
std::error_code parseVersion(StringRef Arg, uint32_t *Major, uint32_t *Minor);
// Parses a string in the form of "<subsystem>[,<integer>[.<integer>]]".
std::error_code parseSubsystem(StringRef Arg, WindowsSubsystem *Sys,
uint32_t *Major, uint32_t *Minor);
std::error_code parseAlternateName(StringRef);
std::error_code parseMerge(StringRef);
// Parses a string in the form of "EMBED[,=<integer>]|NO".
std::error_code parseManifest(StringRef Arg);
// Parses a string in the form of "level=<string>|uiAccess=<string>"
std::error_code parseManifestUAC(StringRef Arg);
// Create a resource file containing a manifest XML.
ErrorOr<std::unique_ptr<MemoryBuffer>> createManifestRes();
std::error_code createSideBySideManifest();
// Used for dllexported symbols.
ErrorOr<Export> parseExport(StringRef Arg);
std::error_code fixupExports();
// Parses a string in the form of "key=value" and check
// if value matches previous values for the key.
// This feature used in the directive section to reject
// incompatible objects.
std::error_code checkFailIfMismatch(StringRef Arg);
// Convert Windows resource files (.res files) to a .obj file
// using cvtres.exe.
ErrorOr<std::unique_ptr<MemoryBuffer>>
convertResToCOFF(const std::vector<MemoryBufferRef> &MBs);
void touchFile(StringRef Path);
// Create enum with OPT_xxx values for each option in Options.td
enum {
OPT_INVALID = 0,
#define OPTION(_1, _2, ID, _4, _5, _6, _7, _8, _9, _10, _11) OPT_##ID,
#include "Options.inc"
#undef OPTION
};
} // namespace coff
} // namespace lld
#endif
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