lld/ELF/Driver.cpp

72 Configuration *config;
97   config = make<Configuration>();
109   config->progName = args[0];
197   if (config->formatBinary) {
242     if (config->isStatic || config->relocatable) {
296   if (config->emachine == EM_MIPS && config->gnuHash)
299   if (config->fixCortexA53Errata843419 && config->emachine != EM_AARCH64)
302   if (config->fixCortexA8 && config->emachine != EM_ARM)
305   if (config->tocOptimize && config->emachine != EM_PPC64)
308   if (config->pie && config->shared)
311   if (!config->shared && !config->filterList.empty())
314   if (!config->shared && !config->auxiliaryList.empty())
317   if (!config->relocatable && !config->defineCommon)
320   if (config->strip == StripPolicy::All && config->emitRelocs)
323   if (config->zText && config->zIfuncNoplt)
326   if (config->relocatable) {
327     if (config->shared)
329     if (config->gcSections)
331     if (config->gdbIndex)
333     if (config->icf != ICFLevel::None)
335     if (config->pie)
337     if (config->exportDynamic)
341   if (config->executeOnly) {
342     if (config->emachine != EM_AARCH64)
345     if (config->singleRoRx && !script->hasSectionsCommand)
349   if (config->zRetpolineplt && config->zForceIbt)
352   if (config->emachine != EM_AARCH64) {
353     if (config->pacPlt)
355     if (config->forceBTI)
506   switch (config->ekind) {
562   if (config->shared)
609     config->noDynamicLinker = true;
739       if (config->warnSymbolOrdering)
762         config->callGraphProfile[std::make_pair(from, to)] += count;
779         config->callGraphProfile[{from, to}] += cgpe.cgp_weight;
818     if (!names.insert(s) && config->warnSymbolOrdering)
828   const char *argv[] = {config->progName.data(), opt.data()};
844   config->allowMultipleDefinition =
848   config->allowShlibUndefined =
851   config->auxiliaryList = args::getStrings(args, OPT_auxiliary);
852   config->bsymbolic = args.hasArg(OPT_Bsymbolic);
853   config->bsymbolicFunctions = args.hasArg(OPT_Bsymbolic_functions);
854   config->checkSections =
856   config->chroot = args.getLastArgValue(OPT_chroot);
857   config->compressDebugSections = getCompressDebugSections(args);
858   config->cref = args.hasFlag(OPT_cref, OPT_no_cref, false);
859   config->defineCommon = args.hasFlag(OPT_define_common, OPT_no_define_common,
861   config->demangle = args.hasFlag(OPT_demangle, OPT_no_demangle, true);
862   config->dependentLibraries = args.hasFlag(OPT_dependent_libraries, OPT_no_dependent_libraries, true);
863   config->disableVerify = args.hasArg(OPT_disable_verify);
864   config->discard = getDiscard(args);
865   config->dwoDir = args.getLastArgValue(OPT_plugin_opt_dwo_dir_eq);
866   config->dynamicLinker = getDynamicLinker(args);
867   config->ehFrameHdr =
869   config->emitLLVM = args.hasArg(OPT_plugin_opt_emit_llvm, false);
870   config->emitRelocs = args.hasArg(OPT_emit_relocs);
871   config->callGraphProfileSort = args.hasFlag(
873   config->enableNewDtags =
875   config->entry = args.getLastArgValue(OPT_entry);
876   config->executeOnly =
878   config->exportDynamic =
880   config->filterList = args::getStrings(args, OPT_filter);
881   config->fini = args.getLastArgValue(OPT_fini, "_fini");
882   config->fixCortexA53Errata843419 = args.hasArg(OPT_fix_cortex_a53_843419);
883   config->fixCortexA8 = args.hasArg(OPT_fix_cortex_a8);
884   config->forceBTI = hasZOption(args, "force-bti");
885   config->gcSections = args.hasFlag(OPT_gc_sections, OPT_no_gc_sections, false);
886   config->gnuUnique = args.hasFlag(OPT_gnu_unique, OPT_no_gnu_unique, true);
887   config->gdbIndex = args.hasFlag(OPT_gdb_index, OPT_no_gdb_index, false);
888   config->icf = getICF(args);
889   config->ignoreDataAddressEquality =
891   config->ignoreFunctionAddressEquality =
893   config->init = args.getLastArgValue(OPT_init, "_init");
894   config->ltoAAPipeline = args.getLastArgValue(OPT_lto_aa_pipeline);
895   config->ltoCSProfileGenerate = args.hasArg(OPT_lto_cs_profile_generate);
896   config->ltoCSProfileFile = args.getLastArgValue(OPT_lto_cs_profile_file);
897   config->ltoDebugPassManager = args.hasArg(OPT_lto_debug_pass_manager);
898   config->ltoNewPassManager = args.hasArg(OPT_lto_new_pass_manager);
899   config->ltoNewPmPasses = args.getLastArgValue(OPT_lto_newpm_passes);
900   config->ltoo = args::getInteger(args, OPT_lto_O, 2);
901   config->ltoObjPath = args.getLastArgValue(OPT_lto_obj_path_eq);
902   config->ltoPartitions = args::getInteger(args, OPT_lto_partitions, 1);
903   config->ltoSampleProfile = args.getLastArgValue(OPT_lto_sample_profile);
904   config->mapFile = args.getLastArgValue(OPT_Map);
905   config->mipsGotSize = args::getInteger(args, OPT_mips_got_size, 0xfff0);
906   config->mergeArmExidx =
908   config->mmapOutputFile =
910   config->nmagic = args.hasFlag(OPT_nmagic, OPT_no_nmagic, false);
911   config->noinhibitExec = args.hasArg(OPT_noinhibit_exec);
912   config->nostdlib = args.hasArg(OPT_nostdlib);
913   config->oFormatBinary = isOutputFormatBinary(args);
914   config->omagic = args.hasFlag(OPT_omagic, OPT_no_omagic, false);
915   config->optRemarksFilename = args.getLastArgValue(OPT_opt_remarks_filename);
916   config->optRemarksPasses = args.getLastArgValue(OPT_opt_remarks_passes);
917   config->optRemarksWithHotness = args.hasArg(OPT_opt_remarks_with_hotness);
918   config->optRemarksFormat = args.getLastArgValue(OPT_opt_remarks_format);
919   config->optimize = args::getInteger(args, OPT_O, 1);
920   config->orphanHandling = getOrphanHandling(args);
921   config->outputFile = args.getLastArgValue(OPT_o);
922   config->pacPlt = hasZOption(args, "pac-plt");
923   config->pie = args.hasFlag(OPT_pie, OPT_no_pie, false);
924   config->printIcfSections =
926   config->printGcSections =
928   config->printSymbolOrder =
930   config->rpath = getRpath(args);
931   config->relocatable = args.hasArg(OPT_relocatable);
932   config->saveTemps = args.hasArg(OPT_save_temps);
933   config->searchPaths = args::getStrings(args, OPT_library_path);
934   config->sectionStartMap = getSectionStartMap(args);
935   config->shared = args.hasArg(OPT_shared);
936   config->singleRoRx = args.hasArg(OPT_no_rosegment);
937   config->soName = args.getLastArgValue(OPT_soname);
938   config->sortSection = getSortSection(args);
939   config->splitStackAdjustSize = args::getInteger(args, OPT_split_stack_adjust_size, 16384);
940   config->strip = getStrip(args);
941   config->sysroot = args.getLastArgValue(OPT_sysroot);
942   config->target1Rel = args.hasFlag(OPT_target1_rel, OPT_target1_abs, false);
943   config->target2 = getTarget2(args);
944   config->thinLTOCacheDir = args.getLastArgValue(OPT_thinlto_cache_dir);
945   config->thinLTOCachePolicy = CHECK(
948   config->thinLTOEmitImportsFiles = args.hasArg(OPT_thinlto_emit_imports_files);
949   config->thinLTOIndexOnly = args.hasArg(OPT_thinlto_index_only) ||
951   config->thinLTOIndexOnlyArg = args.getLastArgValue(OPT_thinlto_index_only_eq);
952   config->thinLTOJobs = args::getInteger(args, OPT_thinlto_jobs, -1u);
953   config->thinLTOObjectSuffixReplace =
955   config->thinLTOPrefixReplace =
957   config->trace = args.hasArg(OPT_trace);
958   config->undefined = args::getStrings(args, OPT_undefined);
959   config->undefinedVersion =
961   config->useAndroidRelrTags = args.hasFlag(
963   config->unresolvedSymbols = getUnresolvedSymbolPolicy(args);
964   config->warnBackrefs =
966   config->warnCommon = args.hasFlag(OPT_warn_common, OPT_no_warn_common, false);
967   config->warnIfuncTextrel =
969   config->warnSymbolOrdering =
971   config->zCombreloc = getZFlag(args, "combreloc", "nocombreloc", true);
972   config->zCopyreloc = getZFlag(args, "copyreloc", "nocopyreloc", true);
973   config->zForceIbt = hasZOption(args, "force-ibt");
974   config->zGlobal = hasZOption(args, "global");
975   config->zGnustack = getZGnuStack(args);
976   config->zHazardplt = hasZOption(args, "hazardplt");
977   config->zIfuncNoplt = hasZOption(args, "ifunc-noplt");
978   config->zInitfirst = hasZOption(args, "initfirst");
979   config->zInterpose = hasZOption(args, "interpose");
980   config->zKeepTextSectionPrefix = getZFlag(
982   config->zNodefaultlib = hasZOption(args, "nodefaultlib");
983   config->zNodelete = hasZOption(args, "nodelete");
984   config->zNodlopen = hasZOption(args, "nodlopen");
985   config->zNow = getZFlag(args, "now", "lazy", false);
986   config->zOrigin = hasZOption(args, "origin");
987   config->zRelro = getZFlag(args, "relro", "norelro", true);
988   config->zRetpolineplt = hasZOption(args, "retpolineplt");
989   config->zRodynamic = hasZOption(args, "rodynamic");
990   config->zSeparate = getZSeparate(args);
991   config->zShstk = hasZOption(args, "shstk");
992   config->zStackSize = args::getZOptionValue(args, OPT_z, "stack-size", 0);
993   config->zText = getZFlag(args, "text", "notext", true);
994   config->zWxneeded = hasZOption(args, "wxneeded");
1008   if (config->ltoo > 3)
1009     error("invalid optimization level for LTO: " + Twine(config->ltoo));
1010   if (config->ltoPartitions == 0)
1012   if (config->thinLTOJobs == 0)
1015   if (config->splitStackAdjustSize < 0)
1029     std::tie(config->ekind, config->emachine, config->osabi) =
1031     config->mipsN32Abi =
1033     config->emulation = s;
1040       config->sysvHash = true;
1042       config->gnuHash = true;
1044       config->sysvHash = config->gnuHash = true;
1050     config->mapFile = "-";
1055   if (config->nmagic || config->omagic)
1056     config->zRelro = false;
1058   std::tie(config->buildId, config->buildIdVector) = getBuildId(args);
1060   std::tie(config->androidPackDynRelocs, config->relrPackDynRelocs) =
1068       config->symbolOrderingFile = getSymbolOrderingFile(*buffer);
1071       config->callGraphProfileSort = false;
1075   assert(config->versionDefinitions.empty());
1076   config->versionDefinitions.push_back({"local", (uint16_t)VER_NDX_LOCAL, {}});
1077   config->versionDefinitions.push_back(
1083     config->versionDefinitions[VER_NDX_LOCAL].patterns.push_back(
1087         config->versionDefinitions[VER_NDX_GLOBAL].patterns.push_back(
1094   if (!config->exportDynamic) {
1100       config->dynamicList.push_back(
1109     config->undefined.push_back(arg->getValue());
1125   ELFKind k = config->ekind;
1126   uint16_t m = config->emachine;
1128   config->copyRelocs = (config->relocatable || config->emitRelocs);
1129   config->is64 = (k == ELF64LEKind || k == ELF64BEKind);
1130   config->isLE = (k == ELF32LEKind || k == ELF64LEKind);
1131   config->endianness = config->isLE ? endianness::little : endianness::big;
1132   config->isMips64EL = (k == ELF64LEKind && m == EM_MIPS);
1133   config->isPic = config->pie || config->shared;
1134   config->picThunk = args.hasArg(OPT_pic_veneer, config->isPic);
1135   config->wordsize = config->is64 ? 8 : 4;
1150   config->isRela = m == EM_AARCH64 || m == EM_AMDGPU || m == EM_HEXAGON ||
1159   config->writeAddends = args.hasFlag(OPT_apply_dynamic_relocs,
1161                          !config->isRela;
1163   config->tocOptimize =
1210       config->asNeeded = true;
1213       config->formatBinary = isFormatBinary(arg->getValue());
1216       config->asNeeded = false;
1221       config->isStatic = true;
1224       config->isStatic = false;
1265       stack.emplace_back(config->asNeeded, config->isStatic, inWholeArchive);
1272       std::tie(config->asNeeded, config->isStatic, inWholeArchive) = stack.back();
1284   if (config->ekind != ELFNoneKind)
1290     config->ekind = f->ekind;
1291     config->emachine = f->emachine;
1292     config->osabi = f->osabi;
1293     config->mipsN32Abi = config->emachine == EM_MIPS && isMipsN32Abi(f);
1306   if (config->nmagic || config->omagic) {
1321   if (config->nmagic || config->omagic) {
1327   if (val > config->maxPageSize)
1328     val = config->maxPageSize;
1346   if ((v % config->maxPageSize) != 0)
1484       if (config->icf == ICFLevel::Safe || !(d->section->flags & SHF_EXECINSTR))
1505   if (config->icf == ICFLevel::All && config->ignoreDataAddressEquality)
1572   if (!config->sectionStartMap.empty())
1575   if (config->emachine == EM_MIPS)
1699   if (config->emachine != EM_386 && config->emachine != EM_X86_64 &&
1700       config->emachine != EM_AARCH64)
1706     if (config->forceBTI && !(features & GNU_PROPERTY_AARCH64_FEATURE_1_BTI)) {
1709     } else if (config->zForceIbt &&
1720   if (config->pacPlt)
1723   if (config->zShstk)
1735     if (config->emachine == EM_MIPS)
1736       config->sysvHash = true;
1738       config->sysvHash = config->gnuHash = true;
1742   if (config->outputFile.empty())
1743     config->outputFile = "a.out";
1748   if (auto e = tryCreateFile(config->outputFile))
1749     error("cannot open output file " + config->outputFile + ": " + e.message());
1750   if (auto e = tryCreateFile(config->mapFile))
1751     error("cannot open map file " + config->mapFile + ": " + e.message());
1758   config->warnMissingEntry =
1759       (!config->entry.empty() || (!config->shared && !config->relocatable));
1760   if (config->entry.empty() && !config->relocatable)
1761     config->entry = (config->emachine == EM_MIPS) ? "__start" : "_start";
1780   config->hasDynSymTab =
1781       !sharedFiles.empty() || config->isPic || config->exportDynamic;
1789   for (StringRef arg : config->undefined)
1794   if (Symbol *sym = symtab->find(config->entry))
1802   if (Symbol *sym = symtab->find(config->init))
1804   if (Symbol *sym = symtab->find(config->fini))
1854   if (!config->relocatable)
1862   if (!config->relocatable)
1877   if (config->thinLTOIndexOnly)
1883   if (config->emitLLVM)
1909     if (config->strip == StripPolicy::None)
1928   config->andFeatures = getAndFeatures<ELFT>();
1935   config->eflags = target->calcEFlags();
1940   config->maxPageSize = getMaxPageSize(args);
1946   config->commonPageSize = getCommonPageSize(args);
1948   config->imageBase = getImageBase(args);
1950   if (config->emachine == EM_ARM) {
1954     if (config->armHasBlx == false)
1960   if (!config->relocatable)
1984   if (!config->relocatable)
2007   if (config->icf != ICFLevel::None) {
2013   if (config->callGraphProfileSort) {