diff options
Diffstat (limited to 'ELF/Config.h')
| -rw-r--r-- | ELF/Config.h | 90 |
1 files changed, 75 insertions, 15 deletions
diff --git a/ELF/Config.h b/ELF/Config.h index b7706205a5b6f..c8eecec7439c6 100644 --- a/ELF/Config.h +++ b/ELF/Config.h @@ -13,7 +13,10 @@ #include "llvm/ADT/MapVector.h" #include "llvm/ADT/StringRef.h" #include "llvm/ADT/StringSet.h" +#include "llvm/Support/CachePruning.h" +#include "llvm/Support/CodeGen.h" #include "llvm/Support/ELF.h" +#include "llvm/Support/Endian.h" #include <vector> @@ -34,14 +37,14 @@ 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 --discard-{all,locals,none}. +enum class DiscardPolicy { Default, All, Locals, None }; // For --strip-{all,debug}. enum class StripPolicy { None, All, Debug }; // For --unresolved-symbols. -enum class UnresolvedPolicy { NoUndef, ReportError, Warn, Ignore }; +enum class UnresolvedPolicy { ReportError, Warn, WarnAll, Ignore, IgnoreAll }; // For --sort-section and linkerscript sorting rules. enum class SortSectionPolicy { Default, None, Alignment, Name, Priority }; @@ -58,11 +61,10 @@ struct SymbolVersion { // 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; + uint16_t Id = 0; std::vector<SymbolVersion> Globals; - size_t NameOff; // Offset in string table. + size_t NameOff = 0; // Offset in the string table }; // This struct contains the global configuration for the linker. @@ -72,6 +74,7 @@ struct VersionDefinition { struct Configuration { InputFile *FirstElf = nullptr; uint8_t OSABI = 0; + llvm::CachePruningPolicy ThinLTOCachePolicy; llvm::StringMap<uint64_t> SectionStartMap; llvm::StringRef DynamicLinker; llvm::StringRef Entry; @@ -80,10 +83,12 @@ struct Configuration { llvm::StringRef Init; llvm::StringRef LTOAAPipeline; llvm::StringRef LTONewPmPasses; + llvm::StringRef MapFile; llvm::StringRef OutputFile; + llvm::StringRef OptRemarksFilename; llvm::StringRef SoName; llvm::StringRef Sysroot; - llvm::StringSet<> RetainSymbolsFile; + llvm::StringRef ThinLTOCacheDir; std::string RPath; std::vector<VersionDefinition> VersionDefinitions; std::vector<llvm::StringRef> AuxiliaryList; @@ -94,6 +99,7 @@ struct Configuration { std::vector<SymbolVersion> VersionScriptLocals; std::vector<uint8_t> BuildIdVector; bool AllowMultipleDefinition; + bool ArchiveWithoutSymbolsSeen = false; bool AsNeeded = false; bool Bsymbolic; bool BsymbolicFunctions; @@ -102,30 +108,29 @@ struct Configuration { bool Demangle = true; bool DisableVerify; bool EhFrameHdr; + bool EmitRelocs; bool EnableNewDtags; bool ExportDynamic; bool FatalWarnings; bool GcSections; bool GdbIndex; - bool GnuHash = false; + bool GnuHash; bool ICF; - bool Mips64EL = false; bool MipsN32Abi = false; bool NoGnuUnique; bool NoUndefinedVersion; bool Nostdlib; bool OFormatBinary; - bool OMagic; - bool Pic; + bool Omagic; + bool OptRemarksWithHotness; bool Pie; bool PrintGcSections; - bool Rela; bool Relocatable; bool SaveTemps; bool SingleRoRx; bool Shared; bool Static = false; - bool SysvHash = true; + bool SysvHash; bool Target1Rel; bool Threads; bool Trace; @@ -134,17 +139,20 @@ struct Configuration { bool WarnMissingEntry; bool ZCombreloc; bool ZExecstack; + bool ZNocopyreloc; bool ZNodelete; + bool ZNodlopen; bool ZNow; bool ZOrigin; bool ZRelro; + bool ZText; bool ExitEarly; bool ZWxneeded; DiscardPolicy Discard; SortSectionPolicy SortSection; - StripPolicy Strip = StripPolicy::None; + StripPolicy Strip; UnresolvedPolicy UnresolvedSymbols; - Target2Policy Target2 = Target2Policy::GotRel; + Target2Policy Target2; BuildIdKind BuildId = BuildIdKind::None; ELFKind EKind = ELFNoneKind; uint16_t DefaultSymbolVersion = llvm::ELF::VER_NDX_GLOBAL; @@ -157,6 +165,58 @@ struct Configuration { unsigned LTOO; unsigned Optimize; unsigned ThinLTOJobs; + + // The following config options do not directly correspond to any + // particualr command line options. + + // True if we need to pass through relocations in input files to the + // output file. Usually false because we consume relocations. + bool CopyRelocs; + + // True if the target is ELF64. False if ELF32. + bool Is64; + + // True if the target is little-endian. False if big-endian. + bool IsLE; + + // endianness::little if IsLE is true. endianness::big otherwise. + llvm::support::endianness Endianness; + + // True if the target is the little-endian MIPS64. + // + // The reason why we have this variable only for the MIPS is because + // we use this often. Some ELF headers for MIPS64EL are in a + // mixed-endian (which is horrible and I'd say that's a serious spec + // bug), and we need to know whether we are reading MIPS ELF files or + // not in various places. + // + // (Note that MIPS64EL is not a typo for MIPS64LE. This is the official + // name whatever that means. A fun hypothesis is that "EL" is short for + // little-endian written in the little-endian order, but I don't know + // if that's true.) + bool IsMips64EL; + + // The ELF spec defines two types of relocation table entries, RELA and + // REL. RELA is a triplet of (offset, info, addend) while REL is a + // tuple of (offset, info). Addends for REL are implicit and read from + // the location where the relocations are applied. So, REL is more + // compact than RELA but requires a bit of more work to process. + // + // (From the linker writer's view, this distinction is not necessary. + // If the ELF had chosen whichever and sticked with it, it would have + // been easier to write code to process relocations, but it's too late + // to change the spec.) + // + // Each ABI defines its relocation type. IsRela is true if target + // uses RELA. As far as we know, all 64-bit ABIs are using RELA. A + // few 32-bit ABIs are using RELA too. + bool IsRela; + + // True if we are creating position-independent code. + bool Pic; + + // 4 for ELF32, 8 for ELF64. + int Wordsize; }; // The only instance of Configuration struct. |