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-rw-r--r--ELF/Config.h356
1 files changed, 192 insertions, 164 deletions
diff --git a/ELF/Config.h b/ELF/Config.h
index 8fb760e592eb..ff9d3dc0933c 100644
--- a/ELF/Config.h
+++ b/ELF/Config.h
@@ -1,9 +1,8 @@
//===- Config.h -------------------------------------------------*- C++ -*-===//
//
-// The LLVM Linker
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
@@ -18,6 +17,7 @@
#include "llvm/Support/CachePruning.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/Endian.h"
+#include <atomic>
#include <vector>
namespace lld {
@@ -62,18 +62,17 @@ enum class Target2Policy { Abs, Rel, GotRel };
enum class ARMVFPArgKind { Default, Base, VFP, ToolChain };
struct SymbolVersion {
- llvm::StringRef Name;
- bool IsExternCpp;
- bool HasWildcard;
+ 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 {
- llvm::StringRef Name;
- uint16_t Id = 0;
- std::vector<SymbolVersion> Globals;
- size_t NameOff = 0; // Offset in the string table
+ llvm::StringRef name;
+ uint16_t id = 0;
+ std::vector<SymbolVersion> globals;
};
// This struct contains the global configuration for the linker.
@@ -81,162 +80,177 @@ struct VersionDefinition {
// and such fields have the same name as the corresponding options.
// Most fields are initialized by the driver.
struct Configuration {
- uint8_t OSABI = 0;
- llvm::CachePruningPolicy ThinLTOCachePolicy;
- llvm::StringMap<uint64_t> SectionStartMap;
- llvm::StringRef Chroot;
- llvm::StringRef DynamicLinker;
- llvm::StringRef DwoDir;
- llvm::StringRef Entry;
- llvm::StringRef Emulation;
- llvm::StringRef Fini;
- llvm::StringRef Init;
- llvm::StringRef LTOAAPipeline;
- llvm::StringRef LTONewPmPasses;
- llvm::StringRef LTOObjPath;
- llvm::StringRef LTOSampleProfile;
- llvm::StringRef MapFile;
- llvm::StringRef OutputFile;
- llvm::StringRef OptRemarksFilename;
- llvm::StringRef ProgName;
- llvm::StringRef SoName;
- llvm::StringRef Sysroot;
- llvm::StringRef ThinLTOCacheDir;
- llvm::StringRef ThinLTOIndexOnlyArg;
- std::pair<llvm::StringRef, llvm::StringRef> ThinLTOObjectSuffixReplace;
- std::pair<llvm::StringRef, llvm::StringRef> ThinLTOPrefixReplace;
- std::string Rpath;
- std::vector<VersionDefinition> VersionDefinitions;
- std::vector<llvm::StringRef> AuxiliaryList;
- std::vector<llvm::StringRef> FilterList;
- std::vector<llvm::StringRef> SearchPaths;
- std::vector<llvm::StringRef> SymbolOrderingFile;
- std::vector<llvm::StringRef> Undefined;
- std::vector<SymbolVersion> DynamicList;
- std::vector<SymbolVersion> VersionScriptGlobals;
- std::vector<SymbolVersion> VersionScriptLocals;
- std::vector<uint8_t> BuildIdVector;
+ uint8_t osabi = 0;
+ uint32_t andFeatures = 0;
+ llvm::CachePruningPolicy thinLTOCachePolicy;
+ llvm::StringMap<uint64_t> sectionStartMap;
+ llvm::StringRef chroot;
+ llvm::StringRef dynamicLinker;
+ llvm::StringRef dwoDir;
+ llvm::StringRef entry;
+ llvm::StringRef emulation;
+ llvm::StringRef fini;
+ llvm::StringRef init;
+ llvm::StringRef ltoAAPipeline;
+ llvm::StringRef ltoCSProfileFile;
+ llvm::StringRef ltoNewPmPasses;
+ llvm::StringRef ltoObjPath;
+ llvm::StringRef ltoSampleProfile;
+ llvm::StringRef mapFile;
+ llvm::StringRef outputFile;
+ llvm::StringRef optRemarksFilename;
+ llvm::StringRef optRemarksPasses;
+ llvm::StringRef optRemarksFormat;
+ llvm::StringRef progName;
+ llvm::StringRef printSymbolOrder;
+ llvm::StringRef soName;
+ llvm::StringRef sysroot;
+ llvm::StringRef thinLTOCacheDir;
+ llvm::StringRef thinLTOIndexOnlyArg;
+ std::pair<llvm::StringRef, llvm::StringRef> thinLTOObjectSuffixReplace;
+ std::pair<llvm::StringRef, llvm::StringRef> thinLTOPrefixReplace;
+ std::string rpath;
+ std::vector<VersionDefinition> versionDefinitions;
+ std::vector<llvm::StringRef> auxiliaryList;
+ std::vector<llvm::StringRef> filterList;
+ std::vector<llvm::StringRef> searchPaths;
+ std::vector<llvm::StringRef> symbolOrderingFile;
+ std::vector<llvm::StringRef> undefined;
+ std::vector<SymbolVersion> dynamicList;
+ std::vector<SymbolVersion> versionScriptGlobals;
+ std::vector<SymbolVersion> versionScriptLocals;
+ std::vector<uint8_t> buildIdVector;
llvm::MapVector<std::pair<const InputSectionBase *, const InputSectionBase *>,
uint64_t>
- CallGraphProfile;
- bool AllowMultipleDefinition;
- bool AndroidPackDynRelocs;
- bool ARMHasBlx = false;
- bool ARMHasMovtMovw = false;
- bool ARMJ1J2BranchEncoding = false;
- bool AsNeeded = false;
- bool Bsymbolic;
- bool BsymbolicFunctions;
- bool CallGraphProfileSort;
- bool CheckSections;
- bool CompressDebugSections;
- bool Cref;
- bool DefineCommon;
- bool Demangle = true;
- bool DisableVerify;
- bool EhFrameHdr;
- bool EmitLLVM;
- bool EmitRelocs;
- bool EnableNewDtags;
- bool ExecuteOnly;
- bool ExportDynamic;
- bool FixCortexA53Errata843419;
- bool FormatBinary = false;
- bool GcSections;
- bool GdbIndex;
- bool GnuHash = false;
- bool GnuUnique;
- bool HasDynamicList = false;
- bool HasDynSymTab;
- bool IgnoreDataAddressEquality;
- bool IgnoreFunctionAddressEquality;
- bool LTODebugPassManager;
- bool LTONewPassManager;
- bool MergeArmExidx;
- bool MipsN32Abi = false;
- bool NoinhibitExec;
- bool Nostdlib;
- bool OFormatBinary;
- bool Omagic;
- bool OptRemarksWithHotness;
- bool Pie;
- bool PrintGcSections;
- bool PrintIcfSections;
- bool Relocatable;
- bool RelrPackDynRelocs;
- bool SaveTemps;
- bool SingleRoRx;
- bool Shared;
- bool Static = false;
- bool SysvHash = false;
- bool Target1Rel;
- bool Trace;
- bool ThinLTOEmitImportsFiles;
- bool ThinLTOIndexOnly;
- bool TocOptimize;
- bool UndefinedVersion;
- bool UseAndroidRelrTags = false;
- bool WarnBackrefs;
- bool WarnCommon;
- bool WarnIfuncTextrel;
- bool WarnMissingEntry;
- bool WarnSymbolOrdering;
- bool WriteAddends;
- bool ZCombreloc;
- bool ZCopyreloc;
- bool ZExecstack;
- bool ZGlobal;
- bool ZHazardplt;
- bool ZInitfirst;
- bool ZInterpose;
- bool ZKeepTextSectionPrefix;
- bool ZNodefaultlib;
- bool ZNodelete;
- bool ZNodlopen;
- bool ZNow;
- bool ZOrigin;
- bool ZRelro;
- bool ZRodynamic;
- bool ZText;
- bool ZRetpolineplt;
- bool ZWxneeded;
- DiscardPolicy Discard;
- ICFLevel ICF;
- OrphanHandlingPolicy OrphanHandling;
- SortSectionPolicy SortSection;
- StripPolicy Strip;
- UnresolvedPolicy UnresolvedSymbols;
- Target2Policy Target2;
- ARMVFPArgKind ARMVFPArgs = ARMVFPArgKind::Default;
- BuildIdKind BuildId = BuildIdKind::None;
- ELFKind EKind = ELFNoneKind;
- uint16_t DefaultSymbolVersion = llvm::ELF::VER_NDX_GLOBAL;
- uint16_t EMachine = llvm::ELF::EM_NONE;
- llvm::Optional<uint64_t> ImageBase;
- uint64_t MaxPageSize;
- uint64_t MipsGotSize;
- uint64_t ZStackSize;
- unsigned LTOPartitions;
- unsigned LTOO;
- unsigned Optimize;
- unsigned ThinLTOJobs;
- int32_t SplitStackAdjustSize;
+ callGraphProfile;
+ bool allowMultipleDefinition;
+ bool allowShlibUndefined;
+ bool androidPackDynRelocs;
+ bool armHasBlx = false;
+ bool armHasMovtMovw = false;
+ bool armJ1J2BranchEncoding = false;
+ bool asNeeded = false;
+ bool bsymbolic;
+ bool bsymbolicFunctions;
+ bool callGraphProfileSort;
+ bool checkSections;
+ bool compressDebugSections;
+ bool cref;
+ bool defineCommon;
+ bool demangle = true;
+ bool dependentLibraries;
+ bool disableVerify;
+ bool ehFrameHdr;
+ bool emitLLVM;
+ bool emitRelocs;
+ bool enableNewDtags;
+ bool executeOnly;
+ bool exportDynamic;
+ bool fixCortexA53Errata843419;
+ bool forceBTI;
+ bool formatBinary = false;
+ bool requireCET;
+ bool gcSections;
+ bool gdbIndex;
+ bool gnuHash = false;
+ bool gnuUnique;
+ bool hasDynamicList = false;
+ bool hasDynSymTab;
+ bool ignoreDataAddressEquality;
+ bool ignoreFunctionAddressEquality;
+ bool ltoCSProfileGenerate;
+ bool ltoDebugPassManager;
+ bool ltoNewPassManager;
+ bool mergeArmExidx;
+ bool mipsN32Abi = false;
+ bool nmagic;
+ bool noinhibitExec;
+ bool nostdlib;
+ bool oFormatBinary;
+ bool omagic;
+ bool optRemarksWithHotness;
+ bool pacPlt;
+ bool picThunk;
+ bool pie;
+ bool printGcSections;
+ bool printIcfSections;
+ bool relocatable;
+ bool relrPackDynRelocs;
+ bool saveTemps;
+ bool singleRoRx;
+ bool shared;
+ bool isStatic = false;
+ bool sysvHash = false;
+ bool target1Rel;
+ bool trace;
+ bool thinLTOEmitImportsFiles;
+ bool thinLTOIndexOnly;
+ bool tocOptimize;
+ bool undefinedVersion;
+ bool useAndroidRelrTags = false;
+ bool warnBackrefs;
+ bool warnCommon;
+ bool warnIfuncTextrel;
+ bool warnMissingEntry;
+ bool warnSymbolOrdering;
+ bool writeAddends;
+ bool zCombreloc;
+ bool zCopyreloc;
+ bool zExecstack;
+ bool zGlobal;
+ bool zHazardplt;
+ bool zIfuncNoplt;
+ bool zInitfirst;
+ bool zInterpose;
+ bool zKeepTextSectionPrefix;
+ bool zNodefaultlib;
+ bool zNodelete;
+ bool zNodlopen;
+ bool zNow;
+ bool zOrigin;
+ bool zRelro;
+ bool zRodynamic;
+ bool zText;
+ bool zRetpolineplt;
+ bool zWxneeded;
+ DiscardPolicy discard;
+ ICFLevel icf;
+ OrphanHandlingPolicy orphanHandling;
+ SortSectionPolicy sortSection;
+ StripPolicy strip;
+ UnresolvedPolicy unresolvedSymbols;
+ Target2Policy target2;
+ ARMVFPArgKind armVFPArgs = ARMVFPArgKind::Default;
+ BuildIdKind buildId = BuildIdKind::None;
+ ELFKind ekind = ELFNoneKind;
+ uint16_t defaultSymbolVersion = llvm::ELF::VER_NDX_GLOBAL;
+ uint16_t emachine = llvm::ELF::EM_NONE;
+ llvm::Optional<uint64_t> imageBase;
+ uint64_t commonPageSize;
+ uint64_t maxPageSize;
+ uint64_t mipsGotSize;
+ uint64_t zStackSize;
+ unsigned ltoPartitions;
+ unsigned ltoo;
+ unsigned optimize;
+ unsigned thinLTOJobs;
+ int32_t splitStackAdjustSize;
// 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;
+ bool copyRelocs;
// True if the target is ELF64. False if ELF32.
- bool Is64;
+ bool is64;
// True if the target is little-endian. False if big-endian.
- bool IsLE;
+ bool isLE;
- // endianness::little if IsLE is true. endianness::big otherwise.
- llvm::support::endianness Endianness;
+ // endianness::little if isLE is true. endianness::big otherwise.
+ llvm::support::endianness endianness;
// True if the target is the little-endian MIPS64.
//
@@ -250,10 +264,24 @@ struct Configuration {
// 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;
+ bool isMips64EL;
+
+ // True if we need to set the DF_STATIC_TLS flag to an output file,
+ // which works as a hint to the dynamic loader that the file contains
+ // code compiled with the static TLS model. The thread-local variable
+ // compiled with the static TLS model is faster but less flexible, and
+ // it may not be loaded using dlopen().
+ //
+ // We set this flag to true when we see a relocation for the static TLS
+ // model. Once this becomes true, it will never become false.
+ //
+ // Since the flag is updated by multi-threaded code, we use std::atomic.
+ // (Writing to a variable is not considered thread-safe even if the
+ // variable is boolean and we always set the same value from all threads.)
+ std::atomic<bool> hasStaticTlsModel{false};
// Holds set of ELF header flags for the target.
- uint32_t EFlags = 0;
+ uint32_t eflags = 0;
// 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
@@ -269,23 +297,23 @@ struct Configuration {
// 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;
+ bool isRela;
// True if we are creating position-independent code.
- bool Pic;
+ bool isPic;
// 4 for ELF32, 8 for ELF64.
- int Wordsize;
+ int wordsize;
};
// The only instance of Configuration struct.
-extern Configuration *Config;
+extern Configuration *config;
-static inline void errorOrWarn(const Twine &Msg) {
- if (!Config->NoinhibitExec)
- error(Msg);
+static inline void errorOrWarn(const Twine &msg) {
+ if (!config->noinhibitExec)
+ error(msg);
else
- warn(Msg);
+ warn(msg);
}
} // namespace elf
} // namespace lld
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