#include "ARMFPUName.h"
#include "ARMRegisterInfo.h"
#include "ARMUnwindOpAsm.h"
-#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCObjectStreamer.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSection.h"
#define ARM_FPU_NAME(NAME, ID) case ARM::ID: return NAME;
#include "ARMFPUName.def"
}
- return NULL;
+ return nullptr;
}
static const char *GetArchName(unsigned ID) {
#define ARM_ARCH_ALIAS(NAME, ID) /* empty */
#include "ARMArchName.def"
}
- return NULL;
+ return nullptr;
}
static const char *GetArchDefaultCPUName(unsigned ID) {
#define ARM_ARCH_ALIAS(NAME, ID) /* empty */
#include "ARMArchName.def"
}
- return NULL;
+ return nullptr;
}
static unsigned GetArchDefaultCPUArch(unsigned ID) {
MCInstPrinter &InstPrinter;
bool IsVerboseAsm;
- virtual void emitFnStart();
- virtual void emitFnEnd();
- virtual void emitCantUnwind();
- virtual void emitPersonality(const MCSymbol *Personality);
- virtual void emitPersonalityIndex(unsigned Index);
- virtual void emitHandlerData();
- virtual void emitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset = 0);
- virtual void emitMovSP(unsigned Reg, int64_t Offset = 0);
- virtual void emitPad(int64_t Offset);
- virtual void emitRegSave(const SmallVectorImpl<unsigned> &RegList,
- bool isVector);
- virtual void emitUnwindRaw(int64_t Offset,
- const SmallVectorImpl<uint8_t> &Opcodes);
-
- virtual void switchVendor(StringRef Vendor);
- virtual void emitAttribute(unsigned Attribute, unsigned Value);
- virtual void emitTextAttribute(unsigned Attribute, StringRef String);
- virtual void emitIntTextAttribute(unsigned Attribute, unsigned IntValue,
- StringRef StrinValue);
- virtual void emitArch(unsigned Arch);
- virtual void emitObjectArch(unsigned Arch);
- virtual void emitFPU(unsigned FPU);
- virtual void emitInst(uint32_t Inst, char Suffix = '\0');
- virtual void finishAttributeSection();
-
- virtual void AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *SRE);
+ void emitFnStart() override;
+ void emitFnEnd() override;
+ void emitCantUnwind() override;
+ void emitPersonality(const MCSymbol *Personality) override;
+ void emitPersonalityIndex(unsigned Index) override;
+ void emitHandlerData() override;
+ void emitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset = 0) override;
+ void emitMovSP(unsigned Reg, int64_t Offset = 0) override;
+ void emitPad(int64_t Offset) override;
+ void emitRegSave(const SmallVectorImpl<unsigned> &RegList,
+ bool isVector) override;
+ void emitUnwindRaw(int64_t Offset,
+ const SmallVectorImpl<uint8_t> &Opcodes) override;
+
+ void switchVendor(StringRef Vendor) override;
+ void emitAttribute(unsigned Attribute, unsigned Value) override;
+ void emitTextAttribute(unsigned Attribute, StringRef String) override;
+ void emitIntTextAttribute(unsigned Attribute, unsigned IntValue,
+ StringRef StrinValue) override;
+ void emitArch(unsigned Arch) override;
+ void emitObjectArch(unsigned Arch) override;
+ void emitFPU(unsigned FPU) override;
+ void emitInst(uint32_t Inst, char Suffix = '\0') override;
+ void finishAttributeSection() override;
+
+ void AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *SRE) override;
+ void emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) override;
public:
ARMTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS,
OS << "\t.tlsdescseq\t" << S->getSymbol().getName();
}
+void ARMTargetAsmStreamer::emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) {
+ OS << "\t.thumb_set\t" << *Symbol << ", " << *Value << '\n';
+}
+
void ARMTargetAsmStreamer::emitInst(uint32_t Inst, char Suffix) {
OS << "\t.inst";
if (Suffix)
StringRef StringValue;
static bool LessTag(const AttributeItem &LHS, const AttributeItem &RHS) {
- return (LHS.Tag < RHS.Tag);
+ // The conformance tag must be emitted first when serialised
+ // into an object file. Specifically, the addenda to the ARM ABI
+ // states that (2.3.7.4):
+ //
+ // "To simplify recognition by consumers in the common case of
+ // claiming conformity for the whole file, this tag should be
+ // emitted first in a file-scope sub-subsection of the first
+ // public subsection of the attributes section."
+ //
+ // So it is special-cased in this comparison predicate when the
+ // attributes are sorted in finishAttributeSection().
+ return (RHS.Tag != ARMBuildAttrs::conformance) &&
+ ((LHS.Tag == ARMBuildAttrs::conformance) || (LHS.Tag < RHS.Tag));
}
};
for (size_t i = 0; i < Contents.size(); ++i)
if (Contents[i].Tag == Attribute)
return &Contents[i];
- return 0;
+ return nullptr;
}
void setAttributeItem(unsigned Attribute, unsigned Value,
ARMELFStreamer &getStreamer();
- virtual void emitFnStart();
- virtual void emitFnEnd();
- virtual void emitCantUnwind();
- virtual void emitPersonality(const MCSymbol *Personality);
- virtual void emitPersonalityIndex(unsigned Index);
- virtual void emitHandlerData();
- virtual void emitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset = 0);
- virtual void emitMovSP(unsigned Reg, int64_t Offset = 0);
- virtual void emitPad(int64_t Offset);
- virtual void emitRegSave(const SmallVectorImpl<unsigned> &RegList,
- bool isVector);
- virtual void emitUnwindRaw(int64_t Offset,
- const SmallVectorImpl<uint8_t> &Opcodes);
-
- virtual void switchVendor(StringRef Vendor);
- virtual void emitAttribute(unsigned Attribute, unsigned Value);
- virtual void emitTextAttribute(unsigned Attribute, StringRef String);
- virtual void emitIntTextAttribute(unsigned Attribute, unsigned IntValue,
- StringRef StringValue);
- virtual void emitArch(unsigned Arch);
- virtual void emitObjectArch(unsigned Arch);
- virtual void emitFPU(unsigned FPU);
- virtual void emitInst(uint32_t Inst, char Suffix = '\0');
- virtual void finishAttributeSection();
-
- virtual void AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *SRE);
+ void emitFnStart() override;
+ void emitFnEnd() override;
+ void emitCantUnwind() override;
+ void emitPersonality(const MCSymbol *Personality) override;
+ void emitPersonalityIndex(unsigned Index) override;
+ void emitHandlerData() override;
+ void emitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset = 0) override;
+ void emitMovSP(unsigned Reg, int64_t Offset = 0) override;
+ void emitPad(int64_t Offset) override;
+ void emitRegSave(const SmallVectorImpl<unsigned> &RegList,
+ bool isVector) override;
+ void emitUnwindRaw(int64_t Offset,
+ const SmallVectorImpl<uint8_t> &Opcodes) override;
+
+ void switchVendor(StringRef Vendor) override;
+ void emitAttribute(unsigned Attribute, unsigned Value) override;
+ void emitTextAttribute(unsigned Attribute, StringRef String) override;
+ void emitIntTextAttribute(unsigned Attribute, unsigned IntValue,
+ StringRef StringValue) override;
+ void emitArch(unsigned Arch) override;
+ void emitObjectArch(unsigned Arch) override;
+ void emitFPU(unsigned FPU) override;
+ void emitInst(uint32_t Inst, char Suffix = '\0') override;
+ void finishAttributeSection() override;
+ void emitLabel(MCSymbol *Symbol) override;
+
+ void AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *SRE) override;
+ void emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) override;
size_t calculateContentSize() const;
ARMTargetELFStreamer(MCStreamer &S)
: ARMTargetStreamer(S), CurrentVendor("aeabi"), FPU(ARM::INVALID_FPU),
Arch(ARM::INVALID_ARCH), EmittedArch(ARM::INVALID_ARCH),
- AttributeSection(0) {}
+ AttributeSection(nullptr) {}
};
/// Extend the generic ELFStreamer class so that it can emit mapping symbols at
~ARMELFStreamer() {}
- virtual void FinishImpl();
+ void FinishImpl() override;
// ARM exception handling directives
void emitFnStart();
void emitRegSave(const SmallVectorImpl<unsigned> &RegList, bool isVector);
void emitUnwindRaw(int64_t Offset, const SmallVectorImpl<uint8_t> &Opcodes);
- virtual void ChangeSection(const MCSection *Section,
- const MCExpr *Subsection) {
+ void ChangeSection(const MCSection *Section,
+ const MCExpr *Subsection) override {
// We have to keep track of the mapping symbol state of any sections we
// use. Each one should start off as EMS_None, which is provided as the
// default constructor by DenseMap::lookup.
/// This function is the one used to emit instruction data into the ELF
/// streamer. We override it to add the appropriate mapping symbol if
/// necessary.
- virtual void EmitInstruction(const MCInst& Inst, const MCSubtargetInfo &STI) {
+ void EmitInstruction(const MCInst& Inst,
+ const MCSubtargetInfo &STI) override {
if (IsThumb)
EmitThumbMappingSymbol();
else
MCELFStreamer::EmitInstruction(Inst, STI);
}
- virtual void emitInst(uint32_t Inst, char Suffix) {
+ void emitInst(uint32_t Inst, char Suffix) {
unsigned Size;
char Buffer[4];
const bool LittleEndian = getContext().getAsmInfo()->isLittleEndian();
/// This is one of the functions used to emit data into an ELF section, so the
/// ARM streamer overrides it to add the appropriate mapping symbol ($d) if
/// necessary.
- virtual void EmitBytes(StringRef Data) {
+ void EmitBytes(StringRef Data) override {
EmitDataMappingSymbol();
MCELFStreamer::EmitBytes(Data);
}
/// This is one of the functions used to emit data into an ELF section, so the
/// ARM streamer overrides it to add the appropriate mapping symbol ($d) if
/// necessary.
- virtual void EmitValueImpl(const MCExpr *Value, unsigned Size) {
+ void EmitValueImpl(const MCExpr *Value, unsigned Size,
+ const SMLoc &Loc) override {
+ if (const MCSymbolRefExpr *SRE = dyn_cast_or_null<MCSymbolRefExpr>(Value))
+ if (SRE->getKind() == MCSymbolRefExpr::VK_ARM_SBREL && !(Size == 4))
+ getContext().FatalError(Loc, "relocated expression must be 32-bit");
+
EmitDataMappingSymbol();
MCELFStreamer::EmitValueImpl(Value, Size);
}
- virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) {
+ void EmitAssemblerFlag(MCAssemblerFlag Flag) override {
MCELFStreamer::EmitAssemblerFlag(Flag);
switch (Flag) {
Symbol->setVariableValue(Value);
}
- void EmitThumbFunc(MCSymbol *Func) {
- // FIXME: Anything needed here to flag the function as thumb?
-
+ void EmitThumbFunc(MCSymbol *Func) override {
getAssembler().setIsThumbFunc(Func);
-
- MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Func);
- SD.setFlags(SD.getFlags() | ELF_Other_ThumbFunc);
+ EmitSymbolAttribute(Func, MCSA_ELF_TypeFunction);
}
// Helper functions for ARM exception handling directives
/* OverwriteExisting= */ false);
break;
+ // FPV5_D16 is identical to FP_ARMV8 except for the number of D registers, so
+ // uses the FP_ARMV8_D16 build attribute.
+ case ARM::FPV5_D16:
+ setAttributeItem(ARMBuildAttrs::FP_arch,
+ ARMBuildAttrs::AllowFPARMv8B,
+ /* OverwriteExisting= */ false);
+ break;
+
case ARM::NEON:
setAttributeItem(ARMBuildAttrs::FP_arch,
ARMBuildAttrs::AllowFPv3A,
if (AttributeSection) {
Streamer.SwitchSection(AttributeSection);
} else {
- AttributeSection =
- Streamer.getContext().getELFSection(".ARM.attributes",
- ELF::SHT_ARM_ATTRIBUTES,
- 0,
- SectionKind::getMetadata());
+ AttributeSection = Streamer.getContext().getELFSection(
+ ".ARM.attributes", ELF::SHT_ARM_ATTRIBUTES, 0);
Streamer.SwitchSection(AttributeSection);
// Format version
Streamer.EmitULEB128IntValue(item.IntValue);
break;
case AttributeItem::TextAttribute:
- Streamer.EmitBytes(item.StringValue.upper());
+ Streamer.EmitBytes(item.StringValue);
Streamer.EmitIntValue(0, 1); // '\0'
break;
case AttributeItem::NumericAndTextAttributes:
Streamer.EmitULEB128IntValue(item.IntValue);
- Streamer.EmitBytes(item.StringValue.upper());
+ Streamer.EmitBytes(item.StringValue);
Streamer.EmitIntValue(0, 1); // '\0'
break;
}
Contents.clear();
FPU = ARM::INVALID_FPU;
}
+
+void ARMTargetELFStreamer::emitLabel(MCSymbol *Symbol) {
+ ARMELFStreamer &Streamer = getStreamer();
+ if (!Streamer.IsThumb)
+ return;
+
+ const MCSymbolData &SD = Streamer.getOrCreateSymbolData(Symbol);
+ unsigned Type = MCELF::GetType(SD);
+ if (Type == ELF_STT_Func || Type == ELF_STT_GnuIFunc)
+ Streamer.EmitThumbFunc(Symbol);
+}
+
void
ARMTargetELFStreamer::AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *S) {
getStreamer().EmitFixup(S, FK_Data_4);
}
+
+void ARMTargetELFStreamer::emitThumbSet(MCSymbol *Symbol, const MCExpr *Value) {
+ if (const MCSymbolRefExpr *SRE = dyn_cast<MCSymbolRefExpr>(Value)) {
+ const MCSymbol &Sym = SRE->getSymbol();
+ if (!Sym.isDefined()) {
+ getStreamer().EmitAssignment(Symbol, Value);
+ return;
+ }
+ }
+
+ getStreamer().EmitThumbFunc(Symbol);
+ getStreamer().EmitAssignment(Symbol, Value);
+}
+
void ARMTargetELFStreamer::emitInst(uint32_t Inst, char Suffix) {
getStreamer().emitInst(Inst, Suffix);
}
}
// Get .ARM.extab or .ARM.exidx section
- const MCSectionELF *EHSection = NULL;
+ const MCSectionELF *EHSection = nullptr;
if (const MCSymbol *Group = FnSection.getGroup()) {
- EHSection = getContext().getELFSection(
- EHSecName, Type, Flags | ELF::SHF_GROUP, Kind,
- FnSection.getEntrySize(), Group->getName());
+ EHSection =
+ getContext().getELFSection(EHSecName, Type, Flags | ELF::SHF_GROUP,
+ FnSection.getEntrySize(), Group->getName());
} else {
- EHSection = getContext().getELFSection(EHSecName, Type, Flags, Kind);
+ EHSection = getContext().getELFSection(EHSecName, Type, Flags);
}
assert(EHSection && "Failed to get the required EH section");
}
void ARMELFStreamer::Reset() {
- ExTab = NULL;
- FnStart = NULL;
- Personality = NULL;
+ ExTab = nullptr;
+ FnStart = nullptr;
+ Personality = nullptr;
PersonalityIndex = ARM::EHABI::NUM_PERSONALITY_INDEX;
FPReg = ARM::SP;
FPOffset = 0;
}
void ARMELFStreamer::emitFnStart() {
- assert(FnStart == 0);
+ assert(FnStart == nullptr);
FnStart = getContext().CreateTempSymbol();
EmitLabel(FnStart);
}
// the second word of exception index table entry. The size of the unwind
// opcodes should always be 4 bytes.
assert(PersonalityIndex == ARM::EHABI::AEABI_UNWIND_CPP_PR0 &&
- "Compact model must use __aeabi_cpp_unwind_pr0 as personality");
+ "Compact model must use __aeabi_unwind_cpp_pr0 as personality");
assert(Opcodes.size() == 4u &&
- "Unwind opcode size for __aeabi_cpp_unwind_pr0 must be equal to 4");
- EmitBytes(StringRef(reinterpret_cast<const char*>(Opcodes.data()),
- Opcodes.size()));
+ "Unwind opcode size for __aeabi_unwind_cpp_pr0 must be equal to 4");
+ uint64_t Intval = Opcodes[0] |
+ Opcodes[1] << 8 |
+ Opcodes[2] << 16 |
+ Opcodes[3] << 24;
+ EmitIntValue(Intval, Opcodes.size());
}
// Switch to the section containing FnStart
const MCSymbolRefExpr *PersonalityRef = MCSymbolRefExpr::Create(
PersonalitySym, MCSymbolRefExpr::VK_ARM_NONE, getContext());
- AddValueSymbols(PersonalityRef);
+ visitUsedExpr(*PersonalityRef);
MCDataFragment *DF = getOrCreateDataFragment();
DF->getFixups().push_back(MCFixup::Create(DF->getContents().size(),
PersonalityRef,
}
// Emit unwind opcodes
- EmitBytes(StringRef(reinterpret_cast<const char *>(Opcodes.data()),
- Opcodes.size()));
+ assert((Opcodes.size() % 4) == 0 &&
+ "Unwind opcode size for __aeabi_cpp_unwind_pr0 must be multiple of 4");
+ for (unsigned I = 0; I != Opcodes.size(); I += 4) {
+ uint64_t Intval = Opcodes[I] |
+ Opcodes[I + 1] << 8 |
+ Opcodes[I + 2] << 16 |
+ Opcodes[I + 3] << 24;
+ EmitIntValue(Intval, 4);
+ }
// According to ARM EHABI section 9.2, if the __aeabi_unwind_cpp_pr1() or
// __aeabi_unwind_cpp_pr2() is used, then the handler data must be emitted
namespace llvm {
MCStreamer *createMCAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
- bool isVerboseAsm, bool useCFI,
- bool useDwarfDirectory,
+ bool isVerboseAsm, bool useDwarfDirectory,
MCInstPrinter *InstPrint, MCCodeEmitter *CE,
MCAsmBackend *TAB, bool ShowInst) {
- MCStreamer *S =
- llvm::createAsmStreamer(Ctx, OS, isVerboseAsm, useCFI, useDwarfDirectory,
- InstPrint, CE, TAB, ShowInst);
+ MCStreamer *S = llvm::createAsmStreamer(
+ Ctx, OS, isVerboseAsm, useDwarfDirectory, InstPrint, CE, TAB, ShowInst);
new ARMTargetAsmStreamer(*S, OS, *InstPrint, isVerboseAsm);
return S;
}
- MCELFStreamer* createARMELFStreamer(MCContext &Context, MCAsmBackend &TAB,
- raw_ostream &OS, MCCodeEmitter *Emitter,
- bool RelaxAll, bool NoExecStack,
- bool IsThumb) {
+MCTargetStreamer *createARMNullTargetStreamer(MCStreamer &S) {
+ return new ARMTargetStreamer(S);
+}
+
+MCELFStreamer *createARMELFStreamer(MCContext &Context, MCAsmBackend &TAB,
+ raw_ostream &OS, MCCodeEmitter *Emitter,
+ bool RelaxAll, bool IsThumb) {
ARMELFStreamer *S = new ARMELFStreamer(Context, TAB, OS, Emitter, IsThumb);
new ARMTargetELFStreamer(*S);
// FIXME: This should eventually end up somewhere else where more
if (RelaxAll)
S->getAssembler().setRelaxAll(true);
- if (NoExecStack)
- S->getAssembler().setNoExecStack(true);
return S;
}
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