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//===- Config.h -------------------------------------------------*- C++ -*-===//
// The LLVM Linker
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/Support/ELF.h"
#include <vector>
namespace lld {
namespace elf {
class InputFile;
struct Symbol;
enum ELFKind {
// For --build-id.
enum class BuildIdKind { None, Fast, Md5, Sha1, Hexstring, Uuid };
// For --discard-{all,locals,none} and --retain-symbols-file.
enum class DiscardPolicy { Default, All, Locals, RetainFile, None };
// For --strip-{all,debug}.
enum class StripPolicy { None, All, Debug };
// For --unresolved-symbols.
enum class UnresolvedPolicy { NoUndef, ReportError, Warn, Ignore };
// For --sort-section and linkerscript sorting rules.
enum class SortSectionPolicy { Default, None, Alignment, Name, Priority };
// For --target2
enum class Target2Policy { Abs, Rel, GotRel };
struct SymbolVersion {
llvm::StringRef Name;
bool IsExternCpp;
bool HasWildcard;
// This struct contains symbols version definition that
// can be found in version script if it is used for link.
struct VersionDefinition {
VersionDefinition(llvm::StringRef Name, uint16_t Id) : Name(Name), Id(Id) {}
llvm::StringRef Name;
uint16_t Id;
std::vector<SymbolVersion> Globals;
size_t NameOff; // Offset in string table.
// This struct contains the global configuration for the linker.
// Most fields are direct mapping from the command line options
// and such fields have the same name as the corresponding options.
// Most fields are initialized by the driver.
struct Configuration {
InputFile *FirstElf = nullptr;
uint8_t OSABI = 0;
llvm::StringMap<uint64_t> SectionStartMap;
llvm::StringRef DynamicLinker;
llvm::StringRef Entry;
llvm::StringRef Emulation;
llvm::StringRef Fini;
llvm::StringRef Init;
llvm::StringRef LTOAAPipeline;
llvm::StringRef LTONewPmPasses;
llvm::StringRef OutputFile;
llvm::StringRef SoName;
llvm::StringRef Sysroot;
llvm::StringSet<> RetainSymbolsFile;
std::string RPath;
std::vector<VersionDefinition> VersionDefinitions;
std::vector<llvm::StringRef> AuxiliaryList;
std::vector<llvm::StringRef> SearchPaths;
std::vector<llvm::StringRef> SymbolOrderingFile;
std::vector<llvm::StringRef> Undefined;
std::vector<SymbolVersion> VersionScriptGlobals;
std::vector<SymbolVersion> VersionScriptLocals;
std::vector<uint8_t> BuildIdVector;
bool AllowMultipleDefinition;
bool AsNeeded = false;
bool Bsymbolic;
bool BsymbolicFunctions;
bool ColorDiagnostics = false;
bool DefineCommon;
bool Demangle = true;
bool DisableVerify;
bool EhFrameHdr;
bool EnableNewDtags;
bool ExportDynamic;
bool FatalWarnings;
bool GcSections;
bool GdbIndex;
bool GnuHash = false;
bool ICF;
bool Mips64EL = false;
bool MipsN32Abi = false;
bool NoGnuUnique;
bool NoUndefinedVersion;
bool Nostdlib;
bool OFormatBinary;
bool OMagic;
bool Pic;
bool Pie;
bool PrintGcSections;
bool Rela;
bool Relocatable;
bool SaveTemps;
bool SingleRoRx;
bool Shared;
bool Static = false;
bool SysvHash = true;
bool Target1Rel;
bool Threads;
bool Trace;
bool Verbose;
bool WarnCommon;
bool WarnMissingEntry;
bool ZCombreloc;
bool ZExecstack;
bool ZNodelete;
bool ZNodlopen;
bool ZNow;
bool ZOrigin;
bool ZRelro;
bool ExitEarly;
bool ZWxneeded;
DiscardPolicy Discard;
SortSectionPolicy SortSection;
StripPolicy Strip = StripPolicy::None;
UnresolvedPolicy UnresolvedSymbols;
Target2Policy Target2 = Target2Policy::GotRel;
BuildIdKind BuildId = BuildIdKind::None;
ELFKind EKind = ELFNoneKind;
uint16_t DefaultSymbolVersion = llvm::ELF::VER_NDX_GLOBAL;
uint16_t EMachine = llvm::ELF::EM_NONE;
uint64_t ErrorLimit = 20;
uint64_t ImageBase;
uint64_t MaxPageSize;
uint64_t ZStackSize;
unsigned LTOPartitions;
unsigned LTOO;
unsigned Optimize;
unsigned ThinLTOJobs;
// The only instance of Configuration struct.
extern Configuration *Config;
} // namespace elf
} // namespace lld