aboutsummaryrefslogtreecommitdiff
path: root/contrib/llvm/tools/lld/ELF/SyntheticSections.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/llvm/tools/lld/ELF/SyntheticSections.cpp')
-rw-r--r--contrib/llvm/tools/lld/ELF/SyntheticSections.cpp77
1 files changed, 29 insertions, 48 deletions
diff --git a/contrib/llvm/tools/lld/ELF/SyntheticSections.cpp b/contrib/llvm/tools/lld/ELF/SyntheticSections.cpp
index b408e653dfa0..a5e291b79a4d 100644
--- a/contrib/llvm/tools/lld/ELF/SyntheticSections.cpp
+++ b/contrib/llvm/tools/lld/ELF/SyntheticSections.cpp
@@ -81,17 +81,9 @@ static ArrayRef<uint8_t> getVersion() {
// With this feature, you can identify LLD-generated binaries easily
// by "readelf --string-dump .comment <file>".
// The returned object is a mergeable string section.
-template <class ELFT> MergeInputSection *elf::createCommentSection() {
- typename ELFT::Shdr Hdr = {};
- Hdr.sh_flags = SHF_MERGE | SHF_STRINGS;
- Hdr.sh_type = SHT_PROGBITS;
- Hdr.sh_entsize = 1;
- Hdr.sh_addralign = 1;
-
- auto *Ret =
- make<MergeInputSection>((ObjFile<ELFT> *)nullptr, &Hdr, ".comment");
- Ret->Data = getVersion();
- return Ret;
+MergeInputSection *elf::createCommentSection() {
+ return make<MergeInputSection>(SHF_MERGE | SHF_STRINGS, SHT_PROGBITS, 1,
+ getVersion(), ".comment");
}
// .MIPS.abiflags section.
@@ -268,16 +260,16 @@ InputSection *elf::createInterpSection() {
StringRef S = Saver.save(Config->DynamicLinker);
ArrayRef<uint8_t> Contents = {(const uint8_t *)S.data(), S.size() + 1};
- auto *Sec =
- make<InputSection>(SHF_ALLOC, SHT_PROGBITS, 1, Contents, ".interp");
+ auto *Sec = make<InputSection>(nullptr, SHF_ALLOC, SHT_PROGBITS, 1, Contents,
+ ".interp");
Sec->Live = true;
return Sec;
}
Symbol *elf::addSyntheticLocal(StringRef Name, uint8_t Type, uint64_t Value,
- uint64_t Size, InputSectionBase *Section) {
- auto *S = make<Defined>(Section->File, Name, STB_LOCAL, STV_DEFAULT, Type,
- Value, Size, Section);
+ uint64_t Size, InputSectionBase &Section) {
+ auto *S = make<Defined>(Section.File, Name, STB_LOCAL, STV_DEFAULT, Type,
+ Value, Size, &Section);
if (InX::SymTab)
InX::SymTab->addSymbol(S);
return S;
@@ -1893,10 +1885,10 @@ size_t PltSection::getSize() const {
void PltSection::addSymbols() {
// The PLT may have symbols defined for the Header, the IPLT has no header
if (HeaderSize != 0)
- Target->addPltHeaderSymbols(this);
+ Target->addPltHeaderSymbols(*this);
size_t Off = HeaderSize;
for (size_t I = 0; I < Entries.size(); ++I) {
- Target->addPltSymbols(this, Off);
+ Target->addPltSymbols(*this, Off);
Off += Target->PltEntrySize;
}
}
@@ -2299,8 +2291,8 @@ VersionNeedSection<ELFT>::VersionNeedSection()
template <class ELFT>
void VersionNeedSection<ELFT>::addSymbol(SharedSymbol *SS) {
- SharedFile<ELFT> *File = SS->getFile<ELFT>();
- const typename ELFT::Verdef *Ver = File->Verdefs[SS->VerdefIndex];
+ SharedFile<ELFT> &File = SS->getFile<ELFT>();
+ const typename ELFT::Verdef *Ver = File.Verdefs[SS->VerdefIndex];
if (!Ver) {
SS->VersionId = VER_NDX_GLOBAL;
return;
@@ -2309,14 +2301,14 @@ void VersionNeedSection<ELFT>::addSymbol(SharedSymbol *SS) {
// If we don't already know that we need an Elf_Verneed for this DSO, prepare
// to create one by adding it to our needed list and creating a dynstr entry
// for the soname.
- if (File->VerdefMap.empty())
- Needed.push_back({File, InX::DynStrTab->addString(File->SoName)});
- typename SharedFile<ELFT>::NeededVer &NV = File->VerdefMap[Ver];
+ if (File.VerdefMap.empty())
+ Needed.push_back({&File, InX::DynStrTab->addString(File.SoName)});
+ typename SharedFile<ELFT>::NeededVer &NV = File.VerdefMap[Ver];
// If we don't already know that we need an Elf_Vernaux for this Elf_Verdef,
// prepare to create one by allocating a version identifier and creating a
// dynstr entry for the version name.
if (NV.Index == 0) {
- NV.StrTab = InX::DynStrTab->addString(File->getStringTable().data() +
+ NV.StrTab = InX::DynStrTab->addString(File.getStringTable().data() +
Ver->getAux()->vda_name);
NV.Index = NextIndex++;
}
@@ -2561,31 +2553,25 @@ ARMExidxSentinelSection::ARMExidxSentinelSection()
// The sentinel must have the PREL31 value of an address higher than any
// address described by any other table entry.
void ARMExidxSentinelSection::writeTo(uint8_t *Buf) {
- // The Sections are sorted in order of ascending PREL31 address with the
- // sentinel last. We need to find the InputSection that precedes the
- // sentinel.
- OutputSection *C = getParent();
- InputSection *Highest = nullptr;
- unsigned Skip = 1;
- for (const BaseCommand *Base : llvm::reverse(C->SectionCommands)) {
- if (!isa<InputSectionDescription>(Base))
- continue;
- auto L = cast<InputSectionDescription>(Base);
- if (Skip >= L->Sections.size()) {
- Skip -= L->Sections.size();
- continue;
- }
- Highest = L->Sections[L->Sections.size() - Skip - 1];
- break;
- }
assert(Highest);
- InputSection *LS = Highest->getLinkOrderDep();
- uint64_t S = LS->getParent()->Addr + LS->getOffset(LS->getSize());
+ uint64_t S =
+ Highest->getParent()->Addr + Highest->getOffset(Highest->getSize());
uint64_t P = getVA();
Target->relocateOne(Buf, R_ARM_PREL31, S - P);
write32le(Buf + 4, 1);
}
+// The sentinel has to be removed if there are no other .ARM.exidx entries.
+bool ARMExidxSentinelSection::empty() const {
+ OutputSection *OS = getParent();
+ for (auto *B : OS->SectionCommands)
+ if (auto *ISD = dyn_cast<InputSectionDescription>(B))
+ for (auto *S : ISD->Sections)
+ if (!isa<ARMExidxSentinelSection>(S))
+ return false;
+ return true;
+}
+
ThunkSection::ThunkSection(OutputSection *OS, uint64_t Off)
: SyntheticSection(SHF_ALLOC | SHF_EXECINSTR, SHT_PROGBITS,
Config->Wordsize, ".text.thunk") {
@@ -2655,11 +2641,6 @@ template void PltSection::addEntry<ELF32BE>(Symbol &Sym);
template void PltSection::addEntry<ELF64LE>(Symbol &Sym);
template void PltSection::addEntry<ELF64BE>(Symbol &Sym);
-template MergeInputSection *elf::createCommentSection<ELF32LE>();
-template MergeInputSection *elf::createCommentSection<ELF32BE>();
-template MergeInputSection *elf::createCommentSection<ELF64LE>();
-template MergeInputSection *elf::createCommentSection<ELF64BE>();
-
template class elf::MipsAbiFlagsSection<ELF32LE>;
template class elf::MipsAbiFlagsSection<ELF32BE>;
template class elf::MipsAbiFlagsSection<ELF64LE>;
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-03 11:29:49 +0000