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Diffstat (limited to 'ELF/Driver.cpp')
-rw-r--r--ELF/Driver.cpp82
1 files changed, 35 insertions, 47 deletions
diff --git a/ELF/Driver.cpp b/ELF/Driver.cpp
index f3943b5cf6559..f24c941fe7733 100644
--- a/ELF/Driver.cpp
+++ b/ELF/Driver.cpp
@@ -36,6 +36,7 @@
#include "ScriptParser.h"
#include "Strings.h"
#include "SymbolTable.h"
+#include "SyntheticSections.h"
#include "Target.h"
#include "Threads.h"
#include "Writer.h"
@@ -43,7 +44,6 @@
#include "lld/Driver/Driver.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
-#include "llvm/Object/Decompressor.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compression.h"
#include "llvm/Support/Path.h"
@@ -99,7 +99,7 @@ static std::tuple<ELFKind, uint16_t, uint8_t> parseEmulation(StringRef Emul) {
std::pair<ELFKind, uint16_t> Ret =
StringSwitch<std::pair<ELFKind, uint16_t>>(S)
.Cases("aarch64elf", "aarch64linux", {ELF64LEKind, EM_AARCH64})
- .Case("armelf_linux_eabi", {ELF32LEKind, EM_ARM})
+ .Cases("armelf", "armelf_linux_eabi", {ELF32LEKind, EM_ARM})
.Case("elf32_x86_64", {ELF32LEKind, EM_X86_64})
.Cases("elf32btsmip", "elf32btsmipn32", {ELF32BEKind, EM_MIPS})
.Cases("elf32ltsmip", "elf32ltsmipn32", {ELF32LEKind, EM_MIPS})
@@ -273,13 +273,6 @@ static void checkOptions(opt::InputArgList &Args) {
}
}
-static StringRef getString(opt::InputArgList &Args, unsigned Key,
- StringRef Default = "") {
- if (auto *Arg = Args.getLastArg(Key))
- return Arg->getValue();
- return Default;
-}
-
static int getInteger(opt::InputArgList &Args, unsigned Key, int Default) {
int V = Default;
if (auto *Arg = Args.getLastArg(Key)) {
@@ -306,13 +299,11 @@ static bool hasZOption(opt::InputArgList &Args, StringRef Key) {
static uint64_t getZOptionValue(opt::InputArgList &Args, StringRef Key,
uint64_t Default) {
for (auto *Arg : Args.filtered(OPT_z)) {
- StringRef Value = Arg->getValue();
- size_t Pos = Value.find("=");
- if (Pos != StringRef::npos && Key == Value.substr(0, Pos)) {
- Value = Value.substr(Pos + 1);
+ std::pair<StringRef, StringRef> KV = StringRef(Arg->getValue()).split('=');
+ if (KV.first == Key) {
uint64_t Result;
- if (!to_integer(Value, Result))
- error("invalid " + Key + ": " + Value);
+ if (!to_integer(KV.second, Result))
+ error("invalid " + Key + ": " + KV.second);
return Result;
}
}
@@ -463,7 +454,7 @@ static UnresolvedPolicy getUnresolvedSymbolPolicy(opt::InputArgList &Args) {
}
static Target2Policy getTarget2(opt::InputArgList &Args) {
- StringRef S = getString(Args, OPT_target2, "got-rel");
+ StringRef S = Args.getLastArgValue(OPT_target2, "got-rel");
if (S == "rel")
return Target2Policy::Rel;
if (S == "abs")
@@ -546,7 +537,7 @@ static StringMap<uint64_t> getSectionStartMap(opt::InputArgList &Args) {
}
static SortSectionPolicy getSortSection(opt::InputArgList &Args) {
- StringRef S = getString(Args, OPT_sort_section);
+ StringRef S = Args.getLastArgValue(OPT_sort_section);
if (S == "alignment")
return SortSectionPolicy::Alignment;
if (S == "name")
@@ -557,7 +548,7 @@ static SortSectionPolicy getSortSection(opt::InputArgList &Args) {
}
static std::pair<bool, bool> getHashStyle(opt::InputArgList &Args) {
- StringRef S = getString(Args, OPT_hash_style, "sysv");
+ StringRef S = Args.getLastArgValue(OPT_hash_style, "sysv");
if (S == "sysv")
return {true, false};
if (S == "gnu")
@@ -608,7 +599,7 @@ static std::vector<StringRef> getLines(MemoryBufferRef MB) {
}
static bool getCompressDebugSections(opt::InputArgList &Args) {
- StringRef S = getString(Args, OPT_compress_debug_sections, "none");
+ StringRef S = Args.getLastArgValue(OPT_compress_debug_sections, "none");
if (S == "none")
return false;
if (S != "zlib")
@@ -634,30 +625,30 @@ void LinkerDriver::readConfigs(opt::InputArgList &Args) {
Config->EhFrameHdr = Args.hasArg(OPT_eh_frame_hdr);
Config->EmitRelocs = Args.hasArg(OPT_emit_relocs);
Config->EnableNewDtags = !Args.hasArg(OPT_disable_new_dtags);
- Config->Entry = getString(Args, OPT_entry);
+ Config->Entry = Args.getLastArgValue(OPT_entry);
Config->ExportDynamic =
getArg(Args, OPT_export_dynamic, OPT_no_export_dynamic, false);
Config->FatalWarnings =
getArg(Args, OPT_fatal_warnings, OPT_no_fatal_warnings, false);
- Config->Fini = getString(Args, OPT_fini, "_fini");
+ Config->Fini = Args.getLastArgValue(OPT_fini, "_fini");
Config->GcSections = getArg(Args, OPT_gc_sections, OPT_no_gc_sections, false);
Config->GdbIndex = Args.hasArg(OPT_gdb_index);
Config->ICF = Args.hasArg(OPT_icf);
- Config->Init = getString(Args, OPT_init, "_init");
- Config->LTOAAPipeline = getString(Args, OPT_lto_aa_pipeline);
- Config->LTONewPmPasses = getString(Args, OPT_lto_newpm_passes);
+ Config->Init = Args.getLastArgValue(OPT_init, "_init");
+ Config->LTOAAPipeline = Args.getLastArgValue(OPT_lto_aa_pipeline);
+ Config->LTONewPmPasses = Args.getLastArgValue(OPT_lto_newpm_passes);
Config->LTOO = getInteger(Args, OPT_lto_O, 2);
Config->LTOPartitions = getInteger(Args, OPT_lto_partitions, 1);
- Config->MapFile = getString(Args, OPT_Map);
+ Config->MapFile = Args.getLastArgValue(OPT_Map);
Config->NoGnuUnique = Args.hasArg(OPT_no_gnu_unique);
Config->NoUndefinedVersion = Args.hasArg(OPT_no_undefined_version);
Config->Nostdlib = Args.hasArg(OPT_nostdlib);
Config->OFormatBinary = isOutputFormatBinary(Args);
Config->Omagic = Args.hasArg(OPT_omagic);
- Config->OptRemarksFilename = getString(Args, OPT_opt_remarks_filename);
+ Config->OptRemarksFilename = Args.getLastArgValue(OPT_opt_remarks_filename);
Config->OptRemarksWithHotness = Args.hasArg(OPT_opt_remarks_with_hotness);
Config->Optimize = getInteger(Args, OPT_O, 1);
- Config->OutputFile = getString(Args, OPT_o);
+ Config->OutputFile = Args.getLastArgValue(OPT_o);
Config->Pie = getArg(Args, OPT_pie, OPT_nopie, false);
Config->PrintGcSections = Args.hasArg(OPT_print_gc_sections);
Config->Rpath = getRpath(Args);
@@ -667,16 +658,16 @@ void LinkerDriver::readConfigs(opt::InputArgList &Args) {
Config->SectionStartMap = getSectionStartMap(Args);
Config->Shared = Args.hasArg(OPT_shared);
Config->SingleRoRx = Args.hasArg(OPT_no_rosegment);
- Config->SoName = getString(Args, OPT_soname);
+ Config->SoName = Args.getLastArgValue(OPT_soname);
Config->SortSection = getSortSection(Args);
Config->Strip = getStrip(Args);
- Config->Sysroot = getString(Args, OPT_sysroot);
+ Config->Sysroot = Args.getLastArgValue(OPT_sysroot);
Config->Target1Rel = getArg(Args, OPT_target1_rel, OPT_target1_abs, false);
Config->Target2 = getTarget2(Args);
- Config->ThinLTOCacheDir = getString(Args, OPT_thinlto_cache_dir);
- Config->ThinLTOCachePolicy =
- check(parseCachePruningPolicy(getString(Args, OPT_thinlto_cache_policy)),
- "--thinlto-cache-policy: invalid cache policy");
+ Config->ThinLTOCacheDir = Args.getLastArgValue(OPT_thinlto_cache_dir);
+ Config->ThinLTOCachePolicy = check(
+ parseCachePruningPolicy(Args.getLastArgValue(OPT_thinlto_cache_policy)),
+ "--thinlto-cache-policy: invalid cache policy");
Config->ThinLTOJobs = getInteger(Args, OPT_thinlto_jobs, -1u);
Config->Threads = getArg(Args, OPT_threads, OPT_no_threads, true);
Config->Trace = Args.hasArg(OPT_trace);
@@ -698,7 +689,8 @@ void LinkerDriver::readConfigs(opt::InputArgList &Args) {
Config->ZWxneeded = hasZOption(Args, "wxneeded");
if (Config->LTOO > 3)
- error("invalid optimization level for LTO: " + getString(Args, OPT_lto_O));
+ error("invalid optimization level for LTO: " +
+ Args.getLastArgValue(OPT_lto_O));
if (Config->LTOPartitions == 0)
error("--lto-partitions: number of threads must be > 0");
if (Config->ThinLTOJobs == 0)
@@ -1001,24 +993,20 @@ template <class ELFT> void LinkerDriver::link(opt::InputArgList &Args) {
for (InputSectionBase *S : F->getSections())
InputSections.push_back(cast<InputSection>(S));
- // Do size optimizations: garbage collection and identical code folding.
+ // This adds a .comment section containing a version string. We have to add it
+ // before decompressAndMergeSections because the .comment section is a
+ // mergeable section.
+ if (!Config->Relocatable)
+ InputSections.push_back(createCommentSection<ELFT>());
+
+ // Do size optimizations: garbage collection, merging of SHF_MERGE sections
+ // and identical code folding.
if (Config->GcSections)
markLive<ELFT>();
+ decompressAndMergeSections();
if (Config->ICF)
doIcf<ELFT>();
- // MergeInputSection::splitIntoPieces needs to be called before
- // any call of MergeInputSection::getOffset. Do that.
- parallelForEach(InputSections.begin(), InputSections.end(),
- [](InputSectionBase *S) {
- if (!S->Live)
- return;
- if (Decompressor::isCompressedELFSection(S->Flags, S->Name))
- S->uncompress();
- if (auto *MS = dyn_cast<MergeInputSection>(S))
- MS->splitIntoPieces();
- });
-
// Write the result to the file.
writeResult<ELFT>();
}
generated by cgit v1.3 (git 2.53.0) at 2026-05-13 00:51:05 +0000