1 //===- InputSection.cpp ---------------------------------------------------===//
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "InputSection.h"
13 #include "InputFiles.h"
14 #include "LinkerScript.h"
15 #include "OutputSections.h"
16 #include "Relocations.h"
17 #include "SymbolTable.h"
19 #include "SyntheticSections.h"
22 #include "lld/Common/ErrorHandler.h"
23 #include "lld/Common/Memory.h"
24 #include "llvm/Support/Compiler.h"
25 #include "llvm/Support/Compression.h"
26 #include "llvm/Support/Endian.h"
27 #include "llvm/Support/Threading.h"
28 #include "llvm/Support/xxhash.h"
35 using namespace llvm::ELF;
36 using namespace llvm::object;
37 using namespace llvm::support;
38 using namespace llvm::support::endian;
39 using namespace llvm::sys;
42 using namespace lld::elf;
44 std::vector<InputSectionBase *> elf::InputSections;
46 // Returns a string to construct an error message.
47 std::string lld::toString(const InputSectionBase *Sec) {
48 return (toString(Sec->File) + ":(" + Sec->Name + ")").str();
52 static ArrayRef<uint8_t> getSectionContents(ObjFile<ELFT> &File,
53 const typename ELFT::Shdr &Hdr) {
54 if (Hdr.sh_type == SHT_NOBITS)
55 return makeArrayRef<uint8_t>(nullptr, Hdr.sh_size);
56 return check(File.getObj().getSectionContents(&Hdr));
59 InputSectionBase::InputSectionBase(InputFile *File, uint64_t Flags,
60 uint32_t Type, uint64_t Entsize,
61 uint32_t Link, uint32_t Info,
62 uint32_t Alignment, ArrayRef<uint8_t> Data,
63 StringRef Name, Kind SectionKind)
64 : SectionBase(SectionKind, Name, Flags, Entsize, Alignment, Type, Info,
66 File(File), RawData(Data) {
67 // In order to reduce memory allocation, we assume that mergeable
68 // sections are smaller than 4 GiB, which is not an unreasonable
69 // assumption as of 2017.
70 if (SectionKind == SectionBase::Merge && RawData.size() > UINT32_MAX)
71 error(toString(this) + ": section too large");
74 AreRelocsRela = false;
76 // The ELF spec states that a value of 0 means the section has
77 // no alignment constraits.
78 uint32_t V = std::max<uint64_t>(Alignment, 1);
79 if (!isPowerOf2_64(V))
80 fatal(toString(File) + ": section sh_addralign is not a power of 2");
83 // In ELF, each section can be compressed by zlib, and if compressed,
84 // section name may be mangled by appending "z" (e.g. ".zdebug_info").
85 // If that's the case, demangle section name so that we can handle a
86 // section as if it weren't compressed.
87 if ((Flags & SHF_COMPRESSED) || Name.startswith(".zdebug")) {
88 if (!zlib::isAvailable())
89 error(toString(File) + ": contains a compressed section, " +
90 "but zlib is not available");
91 parseCompressedHeader();
95 // Drop SHF_GROUP bit unless we are producing a re-linkable object file.
96 // SHF_GROUP is a marker that a section belongs to some comdat group.
97 // That flag doesn't make sense in an executable.
98 static uint64_t getFlags(uint64_t Flags) {
99 Flags &= ~(uint64_t)SHF_INFO_LINK;
100 if (!Config->Relocatable)
101 Flags &= ~(uint64_t)SHF_GROUP;
105 // GNU assembler 2.24 and LLVM 4.0.0's MC (the newest release as of
106 // March 2017) fail to infer section types for sections starting with
107 // ".init_array." or ".fini_array.". They set SHT_PROGBITS instead of
108 // SHF_INIT_ARRAY. As a result, the following assembler directive
109 // creates ".init_array.100" with SHT_PROGBITS, for example.
111 // .section .init_array.100, "aw"
113 // This function forces SHT_{INIT,FINI}_ARRAY so that we can handle
114 // incorrect inputs as if they were correct from the beginning.
115 static uint64_t getType(uint64_t Type, StringRef Name) {
116 if (Type == SHT_PROGBITS && Name.startswith(".init_array."))
117 return SHT_INIT_ARRAY;
118 if (Type == SHT_PROGBITS && Name.startswith(".fini_array."))
119 return SHT_FINI_ARRAY;
123 template <class ELFT>
124 InputSectionBase::InputSectionBase(ObjFile<ELFT> &File,
125 const typename ELFT::Shdr &Hdr,
126 StringRef Name, Kind SectionKind)
127 : InputSectionBase(&File, getFlags(Hdr.sh_flags),
128 getType(Hdr.sh_type, Name), Hdr.sh_entsize, Hdr.sh_link,
129 Hdr.sh_info, Hdr.sh_addralign,
130 getSectionContents(File, Hdr), Name, SectionKind) {
131 // We reject object files having insanely large alignments even though
132 // they are allowed by the spec. I think 4GB is a reasonable limitation.
133 // We might want to relax this in the future.
134 if (Hdr.sh_addralign > UINT32_MAX)
135 fatal(toString(&File) + ": section sh_addralign is too large");
138 size_t InputSectionBase::getSize() const {
139 if (auto *S = dyn_cast<SyntheticSection>(this))
141 if (UncompressedSize >= 0)
142 return UncompressedSize;
143 return RawData.size();
146 void InputSectionBase::uncompress() const {
147 size_t Size = UncompressedSize;
148 UncompressedBuf.reset(new char[Size]);
151 zlib::uncompress(toStringRef(RawData), UncompressedBuf.get(), Size))
152 fatal(toString(this) +
153 ": uncompress failed: " + llvm::toString(std::move(E)));
154 RawData = makeArrayRef((uint8_t *)UncompressedBuf.get(), Size);
157 uint64_t InputSectionBase::getOffsetInFile() const {
158 const uint8_t *FileStart = (const uint8_t *)File->MB.getBufferStart();
159 const uint8_t *SecStart = data().begin();
160 return SecStart - FileStart;
163 uint64_t SectionBase::getOffset(uint64_t Offset) const {
166 auto *OS = cast<OutputSection>(this);
167 // For output sections we treat offset -1 as the end of the section.
168 return Offset == uint64_t(-1) ? OS->Size : Offset;
172 return cast<InputSection>(this)->getOffset(Offset);
174 // The file crtbeginT.o has relocations pointing to the start of an empty
175 // .eh_frame that is known to be the first in the link. It does that to
176 // identify the start of the output .eh_frame.
179 const MergeInputSection *MS = cast<MergeInputSection>(this);
180 if (InputSection *IS = MS->getParent())
181 return IS->getOffset(MS->getParentOffset(Offset));
182 return MS->getParentOffset(Offset);
184 llvm_unreachable("invalid section kind");
187 uint64_t SectionBase::getVA(uint64_t Offset) const {
188 const OutputSection *Out = getOutputSection();
189 return (Out ? Out->Addr : 0) + getOffset(Offset);
192 OutputSection *SectionBase::getOutputSection() {
194 if (auto *IS = dyn_cast<InputSection>(this))
196 else if (auto *MS = dyn_cast<MergeInputSection>(this))
197 Sec = MS->getParent();
198 else if (auto *EH = dyn_cast<EhInputSection>(this))
199 Sec = EH->getParent();
201 return cast<OutputSection>(this);
202 return Sec ? Sec->getParent() : nullptr;
205 // When a section is compressed, `RawData` consists with a header followed
206 // by zlib-compressed data. This function parses a header to initialize
207 // `UncompressedSize` member and remove the header from `RawData`.
208 void InputSectionBase::parseCompressedHeader() {
209 typedef typename ELF64LE::Chdr Chdr64;
210 typedef typename ELF32LE::Chdr Chdr32;
213 if (Name.startswith(".zdebug")) {
214 if (!toStringRef(RawData).startswith("ZLIB")) {
215 error(toString(this) + ": corrupted compressed section header");
218 RawData = RawData.slice(4);
220 if (RawData.size() < 8) {
221 error(toString(this) + ": corrupted compressed section header");
225 UncompressedSize = read64be(RawData.data());
226 RawData = RawData.slice(8);
228 // Restore the original section name.
229 // (e.g. ".zdebug_info" -> ".debug_info")
230 Name = Saver.save("." + Name.substr(2));
234 assert(Flags & SHF_COMPRESSED);
235 Flags &= ~(uint64_t)SHF_COMPRESSED;
237 // New-style 64-bit header
239 if (RawData.size() < sizeof(Chdr64)) {
240 error(toString(this) + ": corrupted compressed section");
244 auto *Hdr = reinterpret_cast<const Chdr64 *>(RawData.data());
245 if (Hdr->ch_type != ELFCOMPRESS_ZLIB) {
246 error(toString(this) + ": unsupported compression type");
250 UncompressedSize = Hdr->ch_size;
251 RawData = RawData.slice(sizeof(*Hdr));
255 // New-style 32-bit header
256 if (RawData.size() < sizeof(Chdr32)) {
257 error(toString(this) + ": corrupted compressed section");
261 auto *Hdr = reinterpret_cast<const Chdr32 *>(RawData.data());
262 if (Hdr->ch_type != ELFCOMPRESS_ZLIB) {
263 error(toString(this) + ": unsupported compression type");
267 UncompressedSize = Hdr->ch_size;
268 RawData = RawData.slice(sizeof(*Hdr));
271 InputSection *InputSectionBase::getLinkOrderDep() const {
273 assert(Flags & SHF_LINK_ORDER);
274 return cast<InputSection>(File->getSections()[Link]);
277 // Find a function symbol that encloses a given location.
278 template <class ELFT>
279 Defined *InputSectionBase::getEnclosingFunction(uint64_t Offset) {
280 for (Symbol *B : File->getSymbols())
281 if (Defined *D = dyn_cast<Defined>(B))
282 if (D->Section == this && D->Type == STT_FUNC && D->Value <= Offset &&
283 Offset < D->Value + D->Size)
288 // Returns a source location string. Used to construct an error message.
289 template <class ELFT>
290 std::string InputSectionBase::getLocation(uint64_t Offset) {
291 std::string SecAndOffset = (Name + "+0x" + utohexstr(Offset)).str();
293 // We don't have file for synthetic sections.
294 if (getFile<ELFT>() == nullptr)
295 return (Config->OutputFile + ":(" + SecAndOffset + ")")
298 // First check if we can get desired values from debugging information.
299 if (Optional<DILineInfo> Info = getFile<ELFT>()->getDILineInfo(this, Offset))
300 return Info->FileName + ":" + std::to_string(Info->Line) + ":(" +
303 // File->SourceFile contains STT_FILE symbol that contains a
304 // source file name. If it's missing, we use an object file name.
305 std::string SrcFile = getFile<ELFT>()->SourceFile;
307 SrcFile = toString(File);
309 if (Defined *D = getEnclosingFunction<ELFT>(Offset))
310 return SrcFile + ":(function " + toString(*D) + ": " + SecAndOffset + ")";
312 // If there's no symbol, print out the offset in the section.
313 return (SrcFile + ":(" + SecAndOffset + ")");
316 // This function is intended to be used for constructing an error message.
317 // The returned message looks like this:
319 // foo.c:42 (/home/alice/possibly/very/long/path/foo.c:42)
321 // Returns an empty string if there's no way to get line info.
322 std::string InputSectionBase::getSrcMsg(const Symbol &Sym, uint64_t Offset) {
323 return File->getSrcMsg(Sym, *this, Offset);
326 // Returns a filename string along with an optional section name. This
327 // function is intended to be used for constructing an error
328 // message. The returned message looks like this:
330 // path/to/foo.o:(function bar)
334 // path/to/foo.o:(function bar) in archive path/to/bar.a
335 std::string InputSectionBase::getObjMsg(uint64_t Off) {
336 std::string Filename = File->getName();
339 if (!File->ArchiveName.empty())
340 Archive = " in archive " + File->ArchiveName;
342 // Find a symbol that encloses a given location.
343 for (Symbol *B : File->getSymbols())
344 if (auto *D = dyn_cast<Defined>(B))
345 if (D->Section == this && D->Value <= Off && Off < D->Value + D->Size)
346 return Filename + ":(" + toString(*D) + ")" + Archive;
348 // If there's no symbol, print out the offset in the section.
349 return (Filename + ":(" + Name + "+0x" + utohexstr(Off) + ")" + Archive)
353 InputSection InputSection::Discarded(nullptr, 0, 0, 0, ArrayRef<uint8_t>(), "");
355 InputSection::InputSection(InputFile *F, uint64_t Flags, uint32_t Type,
356 uint32_t Alignment, ArrayRef<uint8_t> Data,
357 StringRef Name, Kind K)
358 : InputSectionBase(F, Flags, Type,
359 /*Entsize*/ 0, /*Link*/ 0, /*Info*/ 0, Alignment, Data,
362 template <class ELFT>
363 InputSection::InputSection(ObjFile<ELFT> &F, const typename ELFT::Shdr &Header,
365 : InputSectionBase(F, Header, Name, InputSectionBase::Regular) {}
367 bool InputSection::classof(const SectionBase *S) {
368 return S->kind() == SectionBase::Regular ||
369 S->kind() == SectionBase::Synthetic;
372 OutputSection *InputSection::getParent() const {
373 return cast_or_null<OutputSection>(Parent);
376 // Copy SHT_GROUP section contents. Used only for the -r option.
377 template <class ELFT> void InputSection::copyShtGroup(uint8_t *Buf) {
378 // ELFT::Word is the 32-bit integral type in the target endianness.
379 typedef typename ELFT::Word u32;
380 ArrayRef<u32> From = getDataAs<u32>();
381 auto *To = reinterpret_cast<u32 *>(Buf);
383 // The first entry is not a section number but a flag.
386 // Adjust section numbers because section numbers in an input object
387 // files are different in the output.
388 ArrayRef<InputSectionBase *> Sections = File->getSections();
389 for (uint32_t Idx : From.slice(1))
390 *To++ = Sections[Idx]->getOutputSection()->SectionIndex;
393 InputSectionBase *InputSection::getRelocatedSection() const {
394 if (!File || (Type != SHT_RELA && Type != SHT_REL))
396 ArrayRef<InputSectionBase *> Sections = File->getSections();
397 return Sections[Info];
400 // This is used for -r and --emit-relocs. We can't use memcpy to copy
401 // relocations because we need to update symbol table offset and section index
402 // for each relocation. So we copy relocations one by one.
403 template <class ELFT, class RelTy>
404 void InputSection::copyRelocations(uint8_t *Buf, ArrayRef<RelTy> Rels) {
405 InputSectionBase *Sec = getRelocatedSection();
407 for (const RelTy &Rel : Rels) {
408 RelType Type = Rel.getType(Config->IsMips64EL);
409 Symbol &Sym = getFile<ELFT>()->getRelocTargetSym(Rel);
411 auto *P = reinterpret_cast<typename ELFT::Rela *>(Buf);
412 Buf += sizeof(RelTy);
415 P->r_addend = getAddend<ELFT>(Rel);
417 // Output section VA is zero for -r, so r_offset is an offset within the
418 // section, but for --emit-relocs it is an virtual address.
419 P->r_offset = Sec->getVA(Rel.r_offset);
420 P->setSymbolAndType(In.SymTab->getSymbolIndex(&Sym), Type,
423 if (Sym.Type == STT_SECTION) {
424 // We combine multiple section symbols into only one per
425 // section. This means we have to update the addend. That is
426 // trivial for Elf_Rela, but for Elf_Rel we have to write to the
427 // section data. We do that by adding to the Relocation vector.
429 // .eh_frame is horribly special and can reference discarded sections. To
430 // avoid having to parse and recreate .eh_frame, we just replace any
431 // relocation in it pointing to discarded sections with R_*_NONE, which
432 // hopefully creates a frame that is ignored at runtime.
433 auto *D = dyn_cast<Defined>(&Sym);
435 error("STT_SECTION symbol should be defined");
438 SectionBase *Section = D->Section->Repl;
439 if (!Section->Live) {
440 P->setSymbolAndType(0, 0, false);
444 int64_t Addend = getAddend<ELFT>(Rel);
445 const uint8_t *BufLoc = Sec->data().begin() + Rel.r_offset;
447 Addend = Target->getImplicitAddend(BufLoc, Type);
449 if (Config->EMachine == EM_MIPS && Config->Relocatable &&
450 Target->getRelExpr(Type, Sym, BufLoc) == R_MIPS_GOTREL) {
451 // Some MIPS relocations depend on "gp" value. By default,
452 // this value has 0x7ff0 offset from a .got section. But
453 // relocatable files produced by a complier or a linker
454 // might redefine this default value and we must use it
455 // for a calculation of the relocation result. When we
456 // generate EXE or DSO it's trivial. Generating a relocatable
457 // output is more difficult case because the linker does
458 // not calculate relocations in this mode and loses
459 // individual "gp" values used by each input object file.
460 // As a workaround we add the "gp" value to the relocation
461 // addend and save it back to the file.
462 Addend += Sec->getFile<ELFT>()->MipsGp0;
466 P->r_addend = Sym.getVA(Addend) - Section->getOutputSection()->Addr;
467 else if (Config->Relocatable)
468 Sec->Relocations.push_back({R_ABS, Type, Rel.r_offset, Addend, &Sym});
473 // The ARM and AArch64 ABI handle pc-relative relocations to undefined weak
474 // references specially. The general rule is that the value of the symbol in
475 // this context is the address of the place P. A further special case is that
476 // branch relocations to an undefined weak reference resolve to the next
478 static uint32_t getARMUndefinedRelativeWeakVA(RelType Type, uint32_t A,
481 // Unresolved branch relocations to weak references resolve to next
482 // instruction, this will be either 2 or 4 bytes on from P.
483 case R_ARM_THM_JUMP11:
490 case R_ARM_THM_JUMP19:
491 case R_ARM_THM_JUMP24:
494 // We don't want an interworking BLX to ARM
496 // Unresolved non branch pc-relative relocations
497 // R_ARM_TARGET2 which can be resolved relatively is not present as it never
498 // targets a weak-reference.
499 case R_ARM_MOVW_PREL_NC:
500 case R_ARM_MOVT_PREL:
502 case R_ARM_THM_MOVW_PREL_NC:
503 case R_ARM_THM_MOVT_PREL:
506 llvm_unreachable("ARM pc-relative relocation expected\n");
509 // The comment above getARMUndefinedRelativeWeakVA applies to this function.
510 static uint64_t getAArch64UndefinedRelativeWeakVA(uint64_t Type, uint64_t A,
513 // Unresolved branch relocations to weak references resolve to next
514 // instruction, this is 4 bytes on from P.
515 case R_AARCH64_CALL26:
516 case R_AARCH64_CONDBR19:
517 case R_AARCH64_JUMP26:
518 case R_AARCH64_TSTBR14:
520 // Unresolved non branch pc-relative relocations
521 case R_AARCH64_PREL16:
522 case R_AARCH64_PREL32:
523 case R_AARCH64_PREL64:
524 case R_AARCH64_ADR_PREL_LO21:
525 case R_AARCH64_LD_PREL_LO19:
528 llvm_unreachable("AArch64 pc-relative relocation expected\n");
531 // ARM SBREL relocations are of the form S + A - B where B is the static base
532 // The ARM ABI defines base to be "addressing origin of the output segment
533 // defining the symbol S". We defined the "addressing origin"/static base to be
534 // the base of the PT_LOAD segment containing the Sym.
535 // The procedure call standard only defines a Read Write Position Independent
536 // RWPI variant so in practice we should expect the static base to be the base
537 // of the RW segment.
538 static uint64_t getARMStaticBase(const Symbol &Sym) {
539 OutputSection *OS = Sym.getOutputSection();
540 if (!OS || !OS->PtLoad || !OS->PtLoad->FirstSec)
541 fatal("SBREL relocation to " + Sym.getName() + " without static base");
542 return OS->PtLoad->FirstSec->Addr;
545 // For R_RISCV_PC_INDIRECT (R_RISCV_PCREL_LO12_{I,S}), the symbol actually
546 // points the corresponding R_RISCV_PCREL_HI20 relocation, and the target VA
547 // is calculated using PCREL_HI20's symbol.
549 // This function returns the R_RISCV_PCREL_HI20 relocation from
550 // R_RISCV_PCREL_LO12's symbol and addend.
551 static Relocation *getRISCVPCRelHi20(const Symbol *Sym, uint64_t Addend) {
552 const Defined *D = cast<Defined>(Sym);
553 InputSection *IS = cast<InputSection>(D->Section);
556 warn("Non-zero addend in R_RISCV_PCREL_LO12 relocation to " +
557 IS->getObjMsg(D->Value) + " is ignored");
559 // Relocations are sorted by offset, so we can use std::equal_range to do
561 auto Range = std::equal_range(IS->Relocations.begin(), IS->Relocations.end(),
562 D->Value, RelocationOffsetComparator{});
563 for (auto It = std::get<0>(Range); It != std::get<1>(Range); ++It)
564 if (isRelExprOneOf<R_PC>(It->Expr))
567 error("R_RISCV_PCREL_LO12 relocation points to " + IS->getObjMsg(D->Value) +
568 " without an associated R_RISCV_PCREL_HI20 relocation");
572 // A TLS symbol's virtual address is relative to the TLS segment. Add a
573 // target-specific adjustment to produce a thread-pointer-relative offset.
574 static int64_t getTlsTpOffset() {
575 switch (Config->EMachine) {
578 // Variant 1. The thread pointer points to a TCB with a fixed 2-word size,
579 // followed by a variable amount of alignment padding, followed by the TLS
582 // NB: While the ARM/AArch64 ABI formally has a 2-word TCB size, lld
583 // effectively increases the TCB size to 8 words for Android compatibility.
584 // It accomplishes this by increasing the segment's alignment.
585 return alignTo(Config->Wordsize * 2, Out::TlsPhdr->p_align);
588 // Variant 2. The TLS segment is located just before the thread pointer.
589 return -Out::TlsPhdr->p_memsz;
591 // The thread pointer points to a fixed offset from the start of the
592 // executable's TLS segment. An offset of 0x7000 allows a signed 16-bit
593 // offset to reach 0x1000 of TCB/thread-library data and 0xf000 of the
594 // program's TLS segment.
597 llvm_unreachable("unhandled Config->EMachine");
601 static uint64_t getRelocTargetVA(const InputFile *File, RelType Type, int64_t A,
602 uint64_t P, const Symbol &Sym, RelExpr Expr) {
607 case R_RELAX_TLS_LD_TO_LE_ABS:
608 case R_RELAX_GOT_PC_NOPIC:
613 return Sym.getVA(A) - getARMStaticBase(Sym);
616 case R_RELAX_TLS_GD_TO_IE_ABS:
617 return Sym.getGotVA() + A;
619 return In.Got->getVA() + A - P;
620 case R_GOTONLY_PC_FROM_END:
621 return In.Got->getVA() + A - P + In.Got->getSize();
623 return Sym.getVA(A) - In.Got->getVA();
624 case R_GOTREL_FROM_END:
625 return Sym.getVA(A) - In.Got->getVA() - In.Got->getSize();
627 case R_RELAX_TLS_GD_TO_IE_END:
628 return Sym.getGotOffset() + A - In.Got->getSize();
629 case R_TLSLD_GOT_OFF:
631 case R_RELAX_TLS_GD_TO_IE_GOT_OFF:
632 return Sym.getGotOffset() + A;
633 case R_AARCH64_GOT_PAGE_PC:
634 case R_AARCH64_GOT_PAGE_PC_PLT:
635 case R_AARCH64_RELAX_TLS_GD_TO_IE_PAGE_PC:
636 return getAArch64Page(Sym.getGotVA() + A) - getAArch64Page(P);
638 case R_RELAX_TLS_GD_TO_IE:
639 return Sym.getGotVA() + A - P;
641 return Sym.getGotVA() - In.GotPlt->getVA();
643 return Sym.getVA(A) - In.MipsGot->getGp(File);
645 return In.MipsGot->getGp(File) + A;
646 case R_MIPS_GOT_GP_PC: {
647 // R_MIPS_LO16 expression has R_MIPS_GOT_GP_PC type iif the target
648 // is _gp_disp symbol. In that case we should use the following
649 // formula for calculation "AHL + GP - P + 4". For details see p. 4-19 at
650 // ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/mipsabi.pdf
651 // microMIPS variants of these relocations use slightly different
652 // expressions: AHL + GP - P + 3 for %lo() and AHL + GP - P - 1 for %hi()
653 // to correctly handle less-sugnificant bit of the microMIPS symbol.
654 uint64_t V = In.MipsGot->getGp(File) + A - P;
655 if (Type == R_MIPS_LO16 || Type == R_MICROMIPS_LO16)
657 if (Type == R_MICROMIPS_LO16 || Type == R_MICROMIPS_HI16)
661 case R_MIPS_GOT_LOCAL_PAGE:
662 // If relocation against MIPS local symbol requires GOT entry, this entry
663 // should be initialized by 'page address'. This address is high 16-bits
664 // of sum the symbol's value and the addend.
665 return In.MipsGot->getVA() + In.MipsGot->getPageEntryOffset(File, Sym, A) -
666 In.MipsGot->getGp(File);
668 case R_MIPS_GOT_OFF32:
669 // In case of MIPS if a GOT relocation has non-zero addend this addend
670 // should be applied to the GOT entry content not to the GOT entry offset.
671 // That is why we use separate expression type.
672 return In.MipsGot->getVA() + In.MipsGot->getSymEntryOffset(File, Sym, A) -
673 In.MipsGot->getGp(File);
675 return In.MipsGot->getVA() + In.MipsGot->getGlobalDynOffset(File, Sym) -
676 In.MipsGot->getGp(File);
678 return In.MipsGot->getVA() + In.MipsGot->getTlsIndexOffset(File) -
679 In.MipsGot->getGp(File);
680 case R_AARCH64_PAGE_PC: {
681 uint64_t Val = Sym.isUndefWeak() ? P + A : Sym.getVA(A);
682 return getAArch64Page(Val) - getAArch64Page(P);
684 case R_AARCH64_PLT_PAGE_PC: {
685 uint64_t Val = Sym.isUndefWeak() ? P + A : Sym.getPltVA() + A;
686 return getAArch64Page(Val) - getAArch64Page(P);
688 case R_RISCV_PC_INDIRECT: {
689 if (const Relocation *HiRel = getRISCVPCRelHi20(&Sym, A))
690 return getRelocTargetVA(File, HiRel->Type, HiRel->Addend, Sym.getVA(),
691 *HiRel->Sym, HiRel->Expr);
696 if (Sym.isUndefWeak()) {
697 // On ARM and AArch64 a branch to an undefined weak resolves to the
698 // next instruction, otherwise the place.
699 if (Config->EMachine == EM_ARM)
700 Dest = getARMUndefinedRelativeWeakVA(Type, A, P);
701 else if (Config->EMachine == EM_AARCH64)
702 Dest = getAArch64UndefinedRelativeWeakVA(Type, A, P);
711 return Sym.getPltVA() + A;
714 return Sym.getPltVA() + A - P;
716 uint64_t SymVA = Sym.getVA(A);
717 // If we have an undefined weak symbol, we might get here with a symbol
718 // address of zero. That could overflow, but the code must be unreachable,
719 // so don't bother doing anything at all.
723 // PPC64 V2 ABI describes two entry points to a function. The global entry
724 // point is used for calls where the caller and callee (may) have different
725 // TOC base pointers and r2 needs to be modified to hold the TOC base for
726 // the callee. For local calls the caller and callee share the same
727 // TOC base and so the TOC pointer initialization code should be skipped by
728 // branching to the local entry point.
729 return SymVA - P + getPPC64GlobalEntryToLocalEntryOffset(Sym.StOther);
732 return getPPC64TocBase() + A;
734 return Sym.getVA(A) - P;
735 case R_RELAX_TLS_GD_TO_LE:
736 case R_RELAX_TLS_IE_TO_LE:
737 case R_RELAX_TLS_LD_TO_LE:
739 // A weak undefined TLS symbol resolves to the base of the TLS
740 // block, i.e. gets a value of zero. If we pass --gc-sections to
741 // lld and .tbss is not referenced, it gets reclaimed and we don't
742 // create a TLS program header. Therefore, we resolve this
743 // statically to zero.
744 if (Sym.isTls() && Sym.isUndefWeak())
746 return Sym.getVA(A) + getTlsTpOffset();
747 case R_RELAX_TLS_GD_TO_LE_NEG:
749 return Out::TlsPhdr->p_memsz - Sym.getVA(A);
751 return Sym.getSize() + A;
753 return In.Got->getGlobalDynAddr(Sym) + A;
754 case R_AARCH64_TLSDESC_PAGE:
755 return getAArch64Page(In.Got->getGlobalDynAddr(Sym) + A) -
758 return In.Got->getGlobalDynOffset(Sym) + A;
759 case R_TLSGD_GOT_FROM_END:
760 return In.Got->getGlobalDynOffset(Sym) + A - In.Got->getSize();
762 return In.Got->getGlobalDynAddr(Sym) + A - P;
763 case R_TLSLD_GOT_FROM_END:
764 return In.Got->getTlsIndexOff() + A - In.Got->getSize();
766 return In.Got->getTlsIndexOff() + A;
768 return In.Got->getTlsIndexVA() + A - P;
770 llvm_unreachable("invalid expression");
774 // This function applies relocations to sections without SHF_ALLOC bit.
775 // Such sections are never mapped to memory at runtime. Debug sections are
776 // an example. Relocations in non-alloc sections are much easier to
777 // handle than in allocated sections because it will never need complex
778 // treatement such as GOT or PLT (because at runtime no one refers them).
779 // So, we handle relocations for non-alloc sections directly in this
780 // function as a performance optimization.
781 template <class ELFT, class RelTy>
782 void InputSection::relocateNonAlloc(uint8_t *Buf, ArrayRef<RelTy> Rels) {
783 const unsigned Bits = sizeof(typename ELFT::uint) * 8;
785 for (const RelTy &Rel : Rels) {
786 RelType Type = Rel.getType(Config->IsMips64EL);
788 // GCC 8.0 or earlier have a bug that they emit R_386_GOTPC relocations
789 // against _GLOBAL_OFFSET_TABLE_ for .debug_info. The bug has been fixed
790 // in 2017 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82630), but we
791 // need to keep this bug-compatible code for a while.
792 if (Config->EMachine == EM_386 && Type == R_386_GOTPC)
795 uint64_t Offset = getOffset(Rel.r_offset);
796 uint8_t *BufLoc = Buf + Offset;
797 int64_t Addend = getAddend<ELFT>(Rel);
799 Addend += Target->getImplicitAddend(BufLoc, Type);
801 Symbol &Sym = getFile<ELFT>()->getRelocTargetSym(Rel);
802 RelExpr Expr = Target->getRelExpr(Type, Sym, BufLoc);
807 std::string Msg = getLocation<ELFT>(Offset) +
808 ": has non-ABS relocation " + toString(Type) +
809 " against symbol '" + toString(Sym) + "'";
815 // If the control reaches here, we found a PC-relative relocation in a
816 // non-ALLOC section. Since non-ALLOC section is not loaded into memory
817 // at runtime, the notion of PC-relative doesn't make sense here. So,
818 // this is a usage error. However, GNU linkers historically accept such
819 // relocations without any errors and relocate them as if they were at
820 // address 0. For bug-compatibilty, we accept them with warnings. We
821 // know Steel Bank Common Lisp as of 2018 have this bug.
823 Target->relocateOne(BufLoc, Type,
824 SignExtend64<Bits>(Sym.getVA(Addend - Offset)));
828 if (Sym.isTls() && !Out::TlsPhdr)
829 Target->relocateOne(BufLoc, Type, 0);
831 Target->relocateOne(BufLoc, Type, SignExtend64<Bits>(Sym.getVA(Addend)));
835 // This is used when '-r' is given.
836 // For REL targets, InputSection::copyRelocations() may store artificial
837 // relocations aimed to update addends. They are handled in relocateAlloc()
838 // for allocatable sections, and this function does the same for
839 // non-allocatable sections, such as sections with debug information.
840 static void relocateNonAllocForRelocatable(InputSection *Sec, uint8_t *Buf) {
841 const unsigned Bits = Config->Is64 ? 64 : 32;
843 for (const Relocation &Rel : Sec->Relocations) {
844 // InputSection::copyRelocations() adds only R_ABS relocations.
845 assert(Rel.Expr == R_ABS);
846 uint8_t *BufLoc = Buf + Rel.Offset + Sec->OutSecOff;
847 uint64_t TargetVA = SignExtend64(Rel.Sym->getVA(Rel.Addend), Bits);
848 Target->relocateOne(BufLoc, Rel.Type, TargetVA);
852 template <class ELFT>
853 void InputSectionBase::relocate(uint8_t *Buf, uint8_t *BufEnd) {
854 if (Flags & SHF_EXECINSTR)
855 adjustSplitStackFunctionPrologues<ELFT>(Buf, BufEnd);
857 if (Flags & SHF_ALLOC) {
858 relocateAlloc(Buf, BufEnd);
862 auto *Sec = cast<InputSection>(this);
863 if (Config->Relocatable)
864 relocateNonAllocForRelocatable(Sec, Buf);
865 else if (Sec->AreRelocsRela)
866 Sec->relocateNonAlloc<ELFT>(Buf, Sec->template relas<ELFT>());
868 Sec->relocateNonAlloc<ELFT>(Buf, Sec->template rels<ELFT>());
871 void InputSectionBase::relocateAlloc(uint8_t *Buf, uint8_t *BufEnd) {
872 assert(Flags & SHF_ALLOC);
873 const unsigned Bits = Config->Wordsize * 8;
875 for (const Relocation &Rel : Relocations) {
876 uint64_t Offset = Rel.Offset;
877 if (auto *Sec = dyn_cast<InputSection>(this))
878 Offset += Sec->OutSecOff;
879 uint8_t *BufLoc = Buf + Offset;
880 RelType Type = Rel.Type;
882 uint64_t AddrLoc = getOutputSection()->Addr + Offset;
883 RelExpr Expr = Rel.Expr;
884 uint64_t TargetVA = SignExtend64(
885 getRelocTargetVA(File, Type, Rel.Addend, AddrLoc, *Rel.Sym, Expr),
890 case R_RELAX_GOT_PC_NOPIC:
891 Target->relaxGot(BufLoc, TargetVA);
893 case R_RELAX_TLS_IE_TO_LE:
894 Target->relaxTlsIeToLe(BufLoc, Type, TargetVA);
896 case R_RELAX_TLS_LD_TO_LE:
897 case R_RELAX_TLS_LD_TO_LE_ABS:
898 Target->relaxTlsLdToLe(BufLoc, Type, TargetVA);
900 case R_RELAX_TLS_GD_TO_LE:
901 case R_RELAX_TLS_GD_TO_LE_NEG:
902 Target->relaxTlsGdToLe(BufLoc, Type, TargetVA);
904 case R_AARCH64_RELAX_TLS_GD_TO_IE_PAGE_PC:
905 case R_RELAX_TLS_GD_TO_IE:
906 case R_RELAX_TLS_GD_TO_IE_ABS:
907 case R_RELAX_TLS_GD_TO_IE_GOT_OFF:
908 case R_RELAX_TLS_GD_TO_IE_END:
909 Target->relaxTlsGdToIe(BufLoc, Type, TargetVA);
912 // If this is a call to __tls_get_addr, it may be part of a TLS
913 // sequence that has been relaxed and turned into a nop. In this
914 // case, we don't want to handle it as a call.
915 if (read32(BufLoc) == 0x60000000) // nop
918 // Patch a nop (0x60000000) to a ld.
919 if (Rel.Sym->NeedsTocRestore) {
920 if (BufLoc + 8 > BufEnd || read32(BufLoc + 4) != 0x60000000) {
921 error(getErrorLocation(BufLoc) + "call lacks nop, can't restore toc");
924 write32(BufLoc + 4, 0xe8410018); // ld %r2, 24(%r1)
926 Target->relocateOne(BufLoc, Type, TargetVA);
929 Target->relocateOne(BufLoc, Type, TargetVA);
935 // For each function-defining prologue, find any calls to __morestack,
936 // and replace them with calls to __morestack_non_split.
937 static void switchMorestackCallsToMorestackNonSplit(
938 DenseSet<Defined *> &Prologues, std::vector<Relocation *> &MorestackCalls) {
940 // If the target adjusted a function's prologue, all calls to
941 // __morestack inside that function should be switched to
942 // __morestack_non_split.
943 Symbol *MoreStackNonSplit = Symtab->find("__morestack_non_split");
944 if (!MoreStackNonSplit) {
945 error("Mixing split-stack objects requires a definition of "
946 "__morestack_non_split");
950 // Sort both collections to compare addresses efficiently.
951 llvm::sort(MorestackCalls, [](const Relocation *L, const Relocation *R) {
952 return L->Offset < R->Offset;
954 std::vector<Defined *> Functions(Prologues.begin(), Prologues.end());
955 llvm::sort(Functions, [](const Defined *L, const Defined *R) {
956 return L->Value < R->Value;
959 auto It = MorestackCalls.begin();
960 for (Defined *F : Functions) {
961 // Find the first call to __morestack within the function.
962 while (It != MorestackCalls.end() && (*It)->Offset < F->Value)
964 // Adjust all calls inside the function.
965 while (It != MorestackCalls.end() && (*It)->Offset < F->Value + F->Size) {
966 (*It)->Sym = MoreStackNonSplit;
972 static bool enclosingPrologueAttempted(uint64_t Offset,
973 const DenseSet<Defined *> &Prologues) {
974 for (Defined *F : Prologues)
975 if (F->Value <= Offset && Offset < F->Value + F->Size)
980 // If a function compiled for split stack calls a function not
981 // compiled for split stack, then the caller needs its prologue
982 // adjusted to ensure that the called function will have enough stack
983 // available. Find those functions, and adjust their prologues.
984 template <class ELFT>
985 void InputSectionBase::adjustSplitStackFunctionPrologues(uint8_t *Buf,
987 if (!getFile<ELFT>()->SplitStack)
989 DenseSet<Defined *> Prologues;
990 std::vector<Relocation *> MorestackCalls;
992 for (Relocation &Rel : Relocations) {
993 // Local symbols can't possibly be cross-calls, and should have been
994 // resolved long before this line.
995 if (Rel.Sym->isLocal())
998 // Ignore calls into the split-stack api.
999 if (Rel.Sym->getName().startswith("__morestack")) {
1000 if (Rel.Sym->getName().equals("__morestack"))
1001 MorestackCalls.push_back(&Rel);
1005 // A relocation to non-function isn't relevant. Sometimes
1006 // __morestack is not marked as a function, so this check comes
1007 // after the name check.
1008 if (Rel.Sym->Type != STT_FUNC)
1011 // If the callee's-file was compiled with split stack, nothing to do. In
1012 // this context, a "Defined" symbol is one "defined by the binary currently
1013 // being produced". So an "undefined" symbol might be provided by a shared
1014 // library. It is not possible to tell how such symbols were compiled, so be
1016 if (Defined *D = dyn_cast<Defined>(Rel.Sym))
1017 if (InputSection *IS = cast_or_null<InputSection>(D->Section))
1018 if (!IS || !IS->getFile<ELFT>() || IS->getFile<ELFT>()->SplitStack)
1021 if (enclosingPrologueAttempted(Rel.Offset, Prologues))
1024 if (Defined *F = getEnclosingFunction<ELFT>(Rel.Offset)) {
1025 Prologues.insert(F);
1026 if (Target->adjustPrologueForCrossSplitStack(Buf + getOffset(F->Value),
1029 if (!getFile<ELFT>()->SomeNoSplitStack)
1030 error(lld::toString(this) + ": " + F->getName() +
1031 " (with -fsplit-stack) calls " + Rel.Sym->getName() +
1032 " (without -fsplit-stack), but couldn't adjust its prologue");
1036 if (Target->NeedsMoreStackNonSplit)
1037 switchMorestackCallsToMorestackNonSplit(Prologues, MorestackCalls);
1040 template <class ELFT> void InputSection::writeTo(uint8_t *Buf) {
1041 if (Type == SHT_NOBITS)
1044 if (auto *S = dyn_cast<SyntheticSection>(this)) {
1045 S->writeTo(Buf + OutSecOff);
1049 // If -r or --emit-relocs is given, then an InputSection
1050 // may be a relocation section.
1051 if (Type == SHT_RELA) {
1052 copyRelocations<ELFT>(Buf + OutSecOff, getDataAs<typename ELFT::Rela>());
1055 if (Type == SHT_REL) {
1056 copyRelocations<ELFT>(Buf + OutSecOff, getDataAs<typename ELFT::Rel>());
1060 // If -r is given, we may have a SHT_GROUP section.
1061 if (Type == SHT_GROUP) {
1062 copyShtGroup<ELFT>(Buf + OutSecOff);
1066 // If this is a compressed section, uncompress section contents directly
1068 if (UncompressedSize >= 0 && !UncompressedBuf) {
1069 size_t Size = UncompressedSize;
1070 if (Error E = zlib::uncompress(toStringRef(RawData),
1071 (char *)(Buf + OutSecOff), Size))
1072 fatal(toString(this) +
1073 ": uncompress failed: " + llvm::toString(std::move(E)));
1074 uint8_t *BufEnd = Buf + OutSecOff + Size;
1075 relocate<ELFT>(Buf, BufEnd);
1079 // Copy section contents from source object file to output file
1080 // and then apply relocations.
1081 memcpy(Buf + OutSecOff, data().data(), data().size());
1082 uint8_t *BufEnd = Buf + OutSecOff + data().size();
1083 relocate<ELFT>(Buf, BufEnd);
1086 void InputSection::replace(InputSection *Other) {
1087 Alignment = std::max(Alignment, Other->Alignment);
1089 Other->Live = false;
1092 template <class ELFT>
1093 EhInputSection::EhInputSection(ObjFile<ELFT> &F,
1094 const typename ELFT::Shdr &Header,
1096 : InputSectionBase(F, Header, Name, InputSectionBase::EHFrame) {}
1098 SyntheticSection *EhInputSection::getParent() const {
1099 return cast_or_null<SyntheticSection>(Parent);
1102 // Returns the index of the first relocation that points to a region between
1103 // Begin and Begin+Size.
1104 template <class IntTy, class RelTy>
1105 static unsigned getReloc(IntTy Begin, IntTy Size, const ArrayRef<RelTy> &Rels,
1107 // Start search from RelocI for fast access. That works because the
1108 // relocations are sorted in .eh_frame.
1109 for (unsigned N = Rels.size(); RelocI < N; ++RelocI) {
1110 const RelTy &Rel = Rels[RelocI];
1111 if (Rel.r_offset < Begin)
1114 if (Rel.r_offset < Begin + Size)
1121 // .eh_frame is a sequence of CIE or FDE records.
1122 // This function splits an input section into records and returns them.
1123 template <class ELFT> void EhInputSection::split() {
1125 split<ELFT>(relas<ELFT>());
1127 split<ELFT>(rels<ELFT>());
1130 template <class ELFT, class RelTy>
1131 void EhInputSection::split(ArrayRef<RelTy> Rels) {
1133 for (size_t Off = 0, End = data().size(); Off != End;) {
1134 size_t Size = readEhRecordSize(this, Off);
1135 Pieces.emplace_back(Off, this, Size, getReloc(Off, Size, Rels, RelI));
1136 // The empty record is the end marker.
1143 static size_t findNull(StringRef S, size_t EntSize) {
1144 // Optimize the common case.
1148 for (unsigned I = 0, N = S.size(); I != N; I += EntSize) {
1149 const char *B = S.begin() + I;
1150 if (std::all_of(B, B + EntSize, [](char C) { return C == 0; }))
1153 return StringRef::npos;
1156 SyntheticSection *MergeInputSection::getParent() const {
1157 return cast_or_null<SyntheticSection>(Parent);
1160 // Split SHF_STRINGS section. Such section is a sequence of
1161 // null-terminated strings.
1162 void MergeInputSection::splitStrings(ArrayRef<uint8_t> Data, size_t EntSize) {
1164 bool IsAlloc = Flags & SHF_ALLOC;
1165 StringRef S = toStringRef(Data);
1167 while (!S.empty()) {
1168 size_t End = findNull(S, EntSize);
1169 if (End == StringRef::npos)
1170 fatal(toString(this) + ": string is not null terminated");
1171 size_t Size = End + EntSize;
1173 Pieces.emplace_back(Off, xxHash64(S.substr(0, Size)), !IsAlloc);
1179 // Split non-SHF_STRINGS section. Such section is a sequence of
1180 // fixed size records.
1181 void MergeInputSection::splitNonStrings(ArrayRef<uint8_t> Data,
1183 size_t Size = Data.size();
1184 assert((Size % EntSize) == 0);
1185 bool IsAlloc = Flags & SHF_ALLOC;
1187 for (size_t I = 0; I != Size; I += EntSize)
1188 Pieces.emplace_back(I, xxHash64(Data.slice(I, EntSize)), !IsAlloc);
1191 template <class ELFT>
1192 MergeInputSection::MergeInputSection(ObjFile<ELFT> &F,
1193 const typename ELFT::Shdr &Header,
1195 : InputSectionBase(F, Header, Name, InputSectionBase::Merge) {}
1197 MergeInputSection::MergeInputSection(uint64_t Flags, uint32_t Type,
1198 uint64_t Entsize, ArrayRef<uint8_t> Data,
1200 : InputSectionBase(nullptr, Flags, Type, Entsize, /*Link*/ 0, /*Info*/ 0,
1201 /*Alignment*/ Entsize, Data, Name, SectionBase::Merge) {}
1203 // This function is called after we obtain a complete list of input sections
1204 // that need to be linked. This is responsible to split section contents
1205 // into small chunks for further processing.
1207 // Note that this function is called from parallelForEach. This must be
1208 // thread-safe (i.e. no memory allocation from the pools).
1209 void MergeInputSection::splitIntoPieces() {
1210 assert(Pieces.empty());
1212 if (Flags & SHF_STRINGS)
1213 splitStrings(data(), Entsize);
1215 splitNonStrings(data(), Entsize);
1218 SectionPiece *MergeInputSection::getSectionPiece(uint64_t Offset) {
1219 if (this->data().size() <= Offset)
1220 fatal(toString(this) + ": offset is outside the section");
1222 // If Offset is not at beginning of a section piece, it is not in the map.
1223 // In that case we need to do a binary search of the original section piece vector.
1225 llvm::upper_bound(Pieces, Offset, [](uint64_t Offset, SectionPiece P) {
1226 return Offset < P.InputOff;
1231 // Returns the offset in an output section for a given input offset.
1232 // Because contents of a mergeable section is not contiguous in output,
1233 // it is not just an addition to a base output offset.
1234 uint64_t MergeInputSection::getParentOffset(uint64_t Offset) const {
1235 // If Offset is not at beginning of a section piece, it is not in the map.
1236 // In that case we need to search from the original section piece vector.
1237 const SectionPiece &Piece =
1238 *(const_cast<MergeInputSection *>(this)->getSectionPiece (Offset));
1239 uint64_t Addend = Offset - Piece.InputOff;
1240 return Piece.OutputOff + Addend;
1243 template InputSection::InputSection(ObjFile<ELF32LE> &, const ELF32LE::Shdr &,
1245 template InputSection::InputSection(ObjFile<ELF32BE> &, const ELF32BE::Shdr &,
1247 template InputSection::InputSection(ObjFile<ELF64LE> &, const ELF64LE::Shdr &,
1249 template InputSection::InputSection(ObjFile<ELF64BE> &, const ELF64BE::Shdr &,
1252 template std::string InputSectionBase::getLocation<ELF32LE>(uint64_t);
1253 template std::string InputSectionBase::getLocation<ELF32BE>(uint64_t);
1254 template std::string InputSectionBase::getLocation<ELF64LE>(uint64_t);
1255 template std::string InputSectionBase::getLocation<ELF64BE>(uint64_t);
1257 template void InputSection::writeTo<ELF32LE>(uint8_t *);
1258 template void InputSection::writeTo<ELF32BE>(uint8_t *);
1259 template void InputSection::writeTo<ELF64LE>(uint8_t *);
1260 template void InputSection::writeTo<ELF64BE>(uint8_t *);
1262 template MergeInputSection::MergeInputSection(ObjFile<ELF32LE> &,
1263 const ELF32LE::Shdr &, StringRef);
1264 template MergeInputSection::MergeInputSection(ObjFile<ELF32BE> &,
1265 const ELF32BE::Shdr &, StringRef);
1266 template MergeInputSection::MergeInputSection(ObjFile<ELF64LE> &,
1267 const ELF64LE::Shdr &, StringRef);
1268 template MergeInputSection::MergeInputSection(ObjFile<ELF64BE> &,
1269 const ELF64BE::Shdr &, StringRef);
1271 template EhInputSection::EhInputSection(ObjFile<ELF32LE> &,
1272 const ELF32LE::Shdr &, StringRef);
1273 template EhInputSection::EhInputSection(ObjFile<ELF32BE> &,
1274 const ELF32BE::Shdr &, StringRef);
1275 template EhInputSection::EhInputSection(ObjFile<ELF64LE> &,
1276 const ELF64LE::Shdr &, StringRef);
1277 template EhInputSection::EhInputSection(ObjFile<ELF64BE> &,
1278 const ELF64BE::Shdr &, StringRef);
1280 template void EhInputSection::split<ELF32LE>();
1281 template void EhInputSection::split<ELF32BE>();
1282 template void EhInputSection::split<ELF64LE>();
1283 template void EhInputSection::split<ELF64BE>();