[ELF] - R_X86_64_SIZE64/R_X86_64_SIZE32 relocations implemented.
R_X86_64_SIZE64/R_X86_64_SIZE32 relocations were introduced in 0.98v of "System V Application Binary Interface x86-64" (http://www.x86-64.org/documentation/abi.pdf). Calculation for them is Z + A, where: Z - Represents the size of the symbol whose index resides in the relocation entry. A - Represents the addend used to compute the value of the relocatable field. Differential revision: http://reviews.llvm.org/D15335 llvm-svn: 255332
This commit is contained in:
George Rimar
parent
1dbfca60f8
commit
48651489b3
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@ -122,6 +122,14 @@ InputSectionBase<ELFT>::findMipsPairedReloc(uint8_t *Buf, uint32_t Type,
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return nullptr;
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}
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template <class ELFT>
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static typename llvm::object::ELFFile<ELFT>::uintX_t
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getSymSize(SymbolBody &Body) {
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if (auto *SS = dyn_cast<Defined<ELFT>>(&Body))
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return SS->Sym.st_size;
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return 0;
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}
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template <class ELFT>
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template <bool isRela>
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void InputSectionBase<ELFT>::relocate(uint8_t *Buf, uint8_t *BufEnd,
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@ -153,7 +161,7 @@ void InputSectionBase<ELFT>::relocate(uint8_t *Buf, uint8_t *BufEnd,
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const Elf_Shdr *SymTab = File->getSymbolTable();
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if (SymIndex < SymTab->sh_info) {
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uintX_t SymVA = getLocalRelTarget(*File, RI);
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Target->relocateOne(BufLoc, BufEnd, Type, AddrLoc, SymVA,
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Target->relocateOne(BufLoc, BufEnd, Type, AddrLoc, SymVA, 0,
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findMipsPairedReloc(Buf, Type, NextRelocs));
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continue;
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}
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@ -191,11 +199,13 @@ void InputSectionBase<ELFT>::relocate(uint8_t *Buf, uint8_t *BufEnd,
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} else if (!Target->relocNeedsCopy(Type, Body) &&
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isa<SharedSymbol<ELFT>>(Body)) {
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continue;
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} else if (Target->isTlsDynReloc(Type)) {
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} else if (Target->isTlsDynReloc(Type) ||
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Target->isSizeDynReloc(Type, Body)) {
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continue;
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}
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Target->relocateOne(BufLoc, BufEnd, Type, AddrLoc,
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SymVA + getAddend<ELFT>(RI),
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uintX_t A = getAddend<ELFT>(RI);
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uintX_t Size = getSymSize<ELFT>(Body);
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Target->relocateOne(BufLoc, BufEnd, Type, AddrLoc, SymVA + A, Size + A,
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findMipsPairedReloc(Buf, Type, NextRelocs));
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}
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}
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@ -87,7 +87,8 @@ public:
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type, uint64_t P,
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uint64_t SA, uint8_t *PairedLoc = nullptr) const override;
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uint64_t SA, uint64_t ZA = 0,
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uint8_t *PairedLoc = nullptr) const override;
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bool isTlsOptimized(unsigned Type, const SymbolBody *S) const override;
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unsigned relocateTlsOptimize(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
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uint64_t P, uint64_t SA,
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@ -120,9 +121,11 @@ public:
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type, uint64_t P,
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uint64_t SA, uint8_t *PairedLoc = nullptr) const override;
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uint64_t SA, uint64_t ZA = 0,
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uint8_t *PairedLoc = nullptr) const override;
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bool isRelRelative(uint32_t Type) const override;
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bool isTlsOptimized(unsigned Type, const SymbolBody *S) const override;
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bool isSizeDynReloc(uint32_t Type, const SymbolBody &S) const override;
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unsigned relocateTlsOptimize(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
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uint64_t P, uint64_t SA,
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const SymbolBody &S) const override;
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@ -150,7 +153,8 @@ public:
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type, uint64_t P,
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uint64_t SA, uint8_t *PairedLoc = nullptr) const override;
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uint64_t SA, uint64_t ZA = 0,
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uint8_t *PairedLoc = nullptr) const override;
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bool isRelRelative(uint32_t Type) const override;
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};
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@ -169,7 +173,8 @@ public:
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type, uint64_t P,
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uint64_t SA, uint8_t *PairedLoc = nullptr) const override;
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uint64_t SA, uint64_t ZA = 0,
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uint8_t *PairedLoc = nullptr) const override;
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};
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template <class ELFT> class MipsTargetInfo final : public TargetInfo {
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@ -185,7 +190,8 @@ public:
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bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const override;
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bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const override;
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void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type, uint64_t P,
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uint64_t SA, uint8_t *PairedLoc = nullptr) const override;
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uint64_t SA, uint64_t ZA = 0,
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uint8_t *PairedLoc = nullptr) const override;
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};
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} // anonymous namespace
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@ -228,6 +234,10 @@ unsigned TargetInfo::getPltRefReloc(unsigned Type) const { return PCRelReloc; }
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bool TargetInfo::isRelRelative(uint32_t Type) const { return true; }
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bool TargetInfo::isSizeDynReloc(uint32_t Type, const SymbolBody &S) const {
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return false;
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}
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unsigned TargetInfo::relocateTlsOptimize(uint8_t *Loc, uint8_t *BufEnd,
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uint32_t Type, uint64_t P, uint64_t SA,
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const SymbolBody &S) const {
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@ -338,7 +348,7 @@ bool X86TargetInfo::relocNeedsPlt(uint32_t Type, const SymbolBody &S) const {
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}
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void X86TargetInfo::relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
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uint64_t P, uint64_t SA,
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uint64_t P, uint64_t SA, uint64_t ZA,
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uint8_t *PairedLoc) const {
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switch (Type) {
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case R_386_32:
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@ -623,10 +633,18 @@ bool X86_64TargetInfo::isRelRelative(uint32_t Type) const {
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case R_X86_64_PC32:
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case R_X86_64_PC64:
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case R_X86_64_PLT32:
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case R_X86_64_SIZE32:
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case R_X86_64_SIZE64:
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return true;
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}
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}
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bool X86_64TargetInfo::isSizeDynReloc(uint32_t Type,
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const SymbolBody &S) const {
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return (Type == R_X86_64_SIZE32 || Type == R_X86_64_SIZE64) &&
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canBePreempted(&S, false);
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}
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bool X86_64TargetInfo::isTlsOptimized(unsigned Type,
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const SymbolBody *S) const {
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if (Config->Shared || (S && !S->isTLS()))
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@ -767,7 +785,7 @@ unsigned X86_64TargetInfo::relocateTlsOptimize(uint8_t *Loc, uint8_t *BufEnd,
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}
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void X86_64TargetInfo::relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
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uint64_t P, uint64_t SA,
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uint64_t P, uint64_t SA, uint64_t ZA,
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uint8_t *PairedLoc) const {
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switch (Type) {
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case R_X86_64_32:
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@ -794,6 +812,12 @@ void X86_64TargetInfo::relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
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case R_X86_64_TLSLD:
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write32le(Loc, SA - P);
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break;
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case R_X86_64_SIZE32:
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write32le(Loc, ZA);
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break;
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case R_X86_64_SIZE64:
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write64le(Loc, ZA);
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break;
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case R_X86_64_TPOFF32: {
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uint64_t Val = SA - Out<ELF64LE>::TlsPhdr->p_memsz;
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checkInt<32>(Val, Type);
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@ -915,7 +939,7 @@ bool PPC64TargetInfo::isRelRelative(uint32_t Type) const {
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}
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void PPC64TargetInfo::relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
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uint64_t P, uint64_t SA,
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uint64_t P, uint64_t SA, uint64_t ZA,
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uint8_t *PairedLoc) const {
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uint64_t TB = getPPC64TocBase();
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@ -1153,7 +1177,7 @@ static uint64_t getAArch64Page(uint64_t Expr) {
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void AArch64TargetInfo::relocateOne(uint8_t *Loc, uint8_t *BufEnd,
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uint32_t Type, uint64_t P, uint64_t SA,
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uint8_t *PairedLoc) const {
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uint64_t ZA, uint8_t *PairedLoc) const {
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switch (Type) {
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case R_AARCH64_ABS16:
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checkIntUInt<16>(SA, Type);
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@ -1266,7 +1290,7 @@ bool MipsTargetInfo<ELFT>::relocNeedsPlt(uint32_t Type,
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template <class ELFT>
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void MipsTargetInfo<ELFT>::relocateOne(uint8_t *Loc, uint8_t *BufEnd,
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uint32_t Type, uint64_t P, uint64_t SA,
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uint8_t *PairedLoc) const {
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uint64_t ZA, uint8_t *PairedLoc) const {
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const endianness E = ELFT::TargetEndianness;
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switch (Type) {
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case R_MIPS_32:
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@ -53,11 +53,12 @@ public:
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uint64_t GotEntryAddr, uint64_t PltEntryAddr,
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int32_t Index, unsigned RelOff) const = 0;
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virtual bool isRelRelative(uint32_t Type) const;
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virtual bool isSizeDynReloc(uint32_t Type, const SymbolBody &S) const;
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virtual bool relocNeedsCopy(uint32_t Type, const SymbolBody &S) const;
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virtual bool relocNeedsGot(uint32_t Type, const SymbolBody &S) const = 0;
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virtual bool relocNeedsPlt(uint32_t Type, const SymbolBody &S) const = 0;
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virtual void relocateOne(uint8_t *Loc, uint8_t *BufEnd, uint32_t Type,
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uint64_t P, uint64_t SA,
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uint64_t P, uint64_t SA, uint64_t ZA = 0,
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uint8_t *PairedLoc = nullptr) const = 0;
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virtual bool isTlsOptimized(unsigned Type, const SymbolBody *S) const;
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virtual unsigned relocateTlsOptimize(uint8_t *Loc, uint8_t *BufEnd,
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@ -0,0 +1,6 @@
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.data
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.global fooshared
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.type fooshared,%object
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.size fooshared,26
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fooshared:
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.zero 26
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@ -0,0 +1,78 @@
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// RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
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// RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %p/Inputs/relocation-size-shared.s -o %tso.o
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// RUN: ld.lld -shared %tso.o -o %tso
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// RUN: ld.lld %t.o %tso -o %t1
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// RUN: llvm-readobj -r %t1 | FileCheck --check-prefix=RELOCSHARED %s
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// RUN: llvm-objdump -d %t1 | FileCheck --check-prefix=DISASM %s
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// RELOCSHARED: Relocations [
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// RELOCSHARED-NEXT: Section ({{.*}}) .rela.dyn {
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// RELOCSHARED-NEXT: 0x11018 R_X86_64_SIZE64 fooshared 0xFFFFFFFFFFFFFFFF
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// RELOCSHARED-NEXT: 0x11020 R_X86_64_SIZE64 fooshared 0x0
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// RELOCSHARED-NEXT: 0x11028 R_X86_64_SIZE64 fooshared 0x1
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// RELOCSHARED-NEXT: 0x11048 R_X86_64_SIZE32 fooshared 0xFFFFFFFFFFFFFFFF
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// RELOCSHARED-NEXT: 0x1104F R_X86_64_SIZE32 fooshared 0x0
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// RELOCSHARED-NEXT: 0x11056 R_X86_64_SIZE32 fooshared 0x1
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// RELOCSHARED-NEXT: }
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// RELOCSHARED-NEXT:]
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// DISASM: Disassembly of section .text:
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// DISASM: _data:
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// DISASM-NEXT: 11000: 19 00
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// DISASM-NEXT: 11002: 00 00
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// DISASM-NEXT: 11004: 00 00
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// DISASM-NEXT: 11006: 00 00
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// DISASM-NEXT: 11008: 1a 00
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// DISASM-NEXT: 1100a: 00 00
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// DISASM-NEXT: 1100c: 00 00
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// DISASM-NEXT: 1100e: 00 00
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// DISASM-NEXT: 11010: 1b 00
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// DISASM-NEXT: 11012: 00 00
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// DISASM-NEXT: 11014: 00 00
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// DISASM-NEXT: 11016: 00 00
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// DISASM-NEXT: 11018: 00 00
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// DISASM-NEXT: 1101a: 00 00
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// DISASM-NEXT: 1101c: 00 00
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// DISASM-NEXT: 1101e: 00 00
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// DISASM-NEXT: 11020: 00 00
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// DISASM-NEXT: 11022: 00 00
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// DISASM-NEXT: 11024: 00 00
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// DISASM-NEXT: 11026: 00 00
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// DISASM-NEXT: 11028: 00 00
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// DISASM-NEXT: 1102a: 00 00
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// DISASM-NEXT: 1102c: 00 00
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// DISASM-NEXT: 1102e: 00 00
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// DISASM: _start:
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// DISASM-NEXT: 11030: 8b 04 25 19 00 00 00 movl 25, %eax
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// DISASM-NEXT: 11037: 8b 04 25 1a 00 00 00 movl 26, %eax
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// DISASM-NEXT: 1103e: 8b 04 25 1b 00 00 00 movl 27, %eax
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// DISASM-NEXT: 11045: 8b 04 25 00 00 00 00 movl 0, %eax
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// DISASM-NEXT: 1104c: 8b 04 25 00 00 00 00 movl 0, %eax
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// DISASM-NEXT: 11053: 8b 04 25 00 00 00 00 movl 0, %eax
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.data
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.global foo
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.type foo,%object
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.size foo,26
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foo:
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.zero 26
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.text
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_data:
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// R_X86_64_SIZE64:
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.quad foo@SIZE-1
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.quad foo@SIZE
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.quad foo@SIZE+1
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.quad fooshared@SIZE-1
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.quad fooshared@SIZE
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.quad fooshared@SIZE+1
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.globl _start
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_start:
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// R_X86_64_SIZE32:
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movl foo@SIZE-1,%eax
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movl foo@SIZE,%eax
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movl foo@SIZE+1,%eax
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movl fooshared@SIZE-1,%eax
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movl fooshared@SIZE,%eax
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movl fooshared@SIZE+1,%eax
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@ -0,0 +1,123 @@
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// RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t.o
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// RUN: ld.lld %t.o -o %t1
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// RUN: llvm-readobj -r %t1 | FileCheck --check-prefix=NORELOC %s
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// RUN: llvm-objdump -d %t1 | FileCheck --check-prefix=DISASM %s
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// RUN: ld.lld -shared %t.o -o %t1
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// RUN: llvm-readobj -r %t1 | FileCheck --check-prefix=RELOCSHARED %s
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// RUN: llvm-objdump -d %t1 | FileCheck --check-prefix=DISASMSHARED %s
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// NORELOC: Relocations [
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// NORELOC-NEXT: ]
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// DISASM: Disassembly of section .text:
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// DISASM-NEXT: _data:
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// DISASM-NEXT: 11000: 19 00
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// DISASM-NEXT: 11002: 00 00
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// DISASM-NEXT: 11004: 00 00
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// DISASM-NEXT: 11006: 00 00
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// DISASM-NEXT: 11008: 1a 00
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// DISASM-NEXT: 1100a: 00 00
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// DISASM-NEXT: 1100c: 00 00
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// DISASM-NEXT: 1100e: 00 00
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// DISASM-NEXT: 11010: 1b 00
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// DISASM-NEXT: 11012: 00 00
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// DISASM-NEXT: 11014: 00 00
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// DISASM-NEXT: 11016: 00 00
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// DISASM-NEXT: 11018: 19 00
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// DISASM-NEXT: 1101a: 00 00
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// DISASM-NEXT: 1101c: 00 00
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// DISASM-NEXT: 1101e: 00 00
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// DISASM-NEXT: 11020: 1a 00
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// DISASM-NEXT: 11022: 00 00
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// DISASM-NEXT: 11024: 00 00
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// DISASM-NEXT: 11026: 00 00
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// DISASM-NEXT: 11028: 1b 00
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// DISASM-NEXT: 1102a: 00 00
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// DISASM-NEXT: 1102c: 00 00
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// DISASM-NEXT: 1102e: 00 00
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// DISASM: _start:
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// DISASM-NEXT: 11030: 8b 04 25 19 00 00 00 movl 25, %eax
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// DISASM-NEXT: 11037: 8b 04 25 1a 00 00 00 movl 26, %eax
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// DISASM-NEXT: 1103e: 8b 04 25 1b 00 00 00 movl 27, %eax
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// DISASM-NEXT: 11045: 8b 04 25 19 00 00 00 movl 25, %eax
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// DISASM-NEXT: 1104c: 8b 04 25 1a 00 00 00 movl 26, %eax
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// DISASM-NEXT: 11053: 8b 04 25 1b 00 00 00 movl 27, %eax
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// RELOCSHARED: Relocations [
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// RELOCSHARED-NEXT: Section ({{.*}}) .rela.dyn {
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// RELOCSHARED-NEXT: 0x1000 R_X86_64_SIZE64 foo 0xFFFFFFFFFFFFFFFF
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// RELOCSHARED-NEXT: 0x1008 R_X86_64_SIZE64 foo 0x0
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// RELOCSHARED-NEXT: 0x1010 R_X86_64_SIZE64 foo 0x1
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// RELOCSHARED-NEXT: 0x1033 R_X86_64_SIZE32 foo 0xFFFFFFFFFFFFFFFF
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// RELOCSHARED-NEXT: 0x103A R_X86_64_SIZE32 foo 0x0
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// RELOCSHARED-NEXT: 0x1041 R_X86_64_SIZE32 foo 0x1
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// RELOCSHARED-NEXT: }
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// RELOCSHARED-NEXT: ]
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// DISASMSHARED: Disassembly of section .text:
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// DISASMSHARED-NEXT: _data:
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// DISASMSHARED-NEXT: 1000: 00 00
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// DISASMSHARED-NEXT: 1002: 00 00
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// DISASMSHARED-NEXT: 1004: 00 00
|
||||
// DISASMSHARED-NEXT: 1006: 00 00
|
||||
// DISASMSHARED-NEXT: 1008: 00 00
|
||||
// DISASMSHARED-NEXT: 100a: 00 00
|
||||
// DISASMSHARED-NEXT: 100c: 00 00
|
||||
// DISASMSHARED-NEXT: 100e: 00 00
|
||||
// DISASMSHARED-NEXT: 1010: 00 00
|
||||
// DISASMSHARED-NEXT: 1012: 00 00
|
||||
// DISASMSHARED-NEXT: 1014: 00 00
|
||||
// DISASMSHARED-NEXT: 1016: 00 00
|
||||
// DISASMSHARED-NEXT: 1018: 19 00
|
||||
// DISASMSHARED-NEXT: 101a: 00 00
|
||||
// DISASMSHARED-NEXT: 101c: 00 00
|
||||
// DISASMSHARED-NEXT: 101e: 00 00
|
||||
// DISASMSHARED-NEXT: 1020: 1a 00
|
||||
// DISASMSHARED-NEXT: 1022: 00 00
|
||||
// DISASMSHARED-NEXT: 1024: 00 00
|
||||
// DISASMSHARED-NEXT: 1026: 00 00
|
||||
// DISASMSHARED-NEXT: 1028: 1b 00
|
||||
// DISASMSHARED-NEXT: 102a: 00 00
|
||||
// DISASMSHARED-NEXT: 102c: 00 00
|
||||
// DISASMSHARED-NEXT: 102e: 00 00
|
||||
// DISASMSHARED: _start:
|
||||
// DISASMSHARED-NEXT: 1030: 8b 04 25 00 00 00 00 movl 0, %eax
|
||||
// DISASMSHARED-NEXT: 1037: 8b 04 25 00 00 00 00 movl 0, %eax
|
||||
// DISASMSHARED-NEXT: 103e: 8b 04 25 00 00 00 00 movl 0, %eax
|
||||
// DISASMSHARED-NEXT: 1045: 8b 04 25 19 00 00 00 movl 25, %eax
|
||||
// DISASMSHARED-NEXT: 104c: 8b 04 25 1a 00 00 00 movl 26, %eax
|
||||
// DISASMSHARED-NEXT: 1053: 8b 04 25 1b 00 00 00 movl 27, %eax
|
||||
|
||||
.data
|
||||
.global foo
|
||||
.type foo,%object
|
||||
.size foo,26
|
||||
foo:
|
||||
.zero 26
|
||||
|
||||
.data
|
||||
.global foohidden
|
||||
.hidden foohidden
|
||||
.type foohidden,%object
|
||||
.size foohidden,26
|
||||
foohidden:
|
||||
.zero 26
|
||||
|
||||
.text
|
||||
_data:
|
||||
// R_X86_64_SIZE64:
|
||||
.quad foo@SIZE-1
|
||||
.quad foo@SIZE
|
||||
.quad foo@SIZE+1
|
||||
.quad foohidden@SIZE-1
|
||||
.quad foohidden@SIZE
|
||||
.quad foohidden@SIZE+1
|
||||
.globl _start
|
||||
_start:
|
||||
// R_X86_64_SIZE32:
|
||||
movl foo@SIZE-1,%eax
|
||||
movl foo@SIZE,%eax
|
||||
movl foo@SIZE+1,%eax
|
||||
movl foohidden@SIZE-1,%eax
|
||||
movl foohidden@SIZE,%eax
|
||||
movl foohidden@SIZE+1,%eax
|
||||
Loading…
Reference in New Issue