//
//===----------------------------------------------------------------------===//
+#include "ARMArchName.h"
+#include "ARMFPUName.h"
#include "ARMRegisterInfo.h"
-#include "ARMUnwindOp.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/MCAsmInfo.h"
#include "llvm/MC/MCAssembler.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCELFSymbolFlags.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstPrinter.h"
#include "llvm/MC/MCObjectStreamer.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCValue.h"
+#include "llvm/Support/ARMBuildAttributes.h"
+#include "llvm/Support/ARMEHABI.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ELF.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/LEB128.h"
#include "llvm/Support/raw_ostream.h"
+#include <algorithm>
using namespace llvm;
static std::string GetAEABIUnwindPersonalityName(unsigned Index) {
- assert(Index < NUM_PERSONALITY_INDEX && "Invalid personality index");
+ assert(Index < ARM::EHABI::NUM_PERSONALITY_INDEX &&
+ "Invalid personality index");
return (Twine("__aeabi_unwind_cpp_pr") + Twine(Index)).str();
}
+static const char *GetFPUName(unsigned ID) {
+ switch (ID) {
+ default:
+ llvm_unreachable("Unknown FPU kind");
+ break;
+#define ARM_FPU_NAME(NAME, ID) case ARM::ID: return NAME;
+#include "ARMFPUName.def"
+ }
+ return NULL;
+}
+
+static const char *GetArchName(unsigned ID) {
+ switch (ID) {
+ default:
+ llvm_unreachable("Unknown ARCH kind");
+ break;
+#define ARM_ARCH_NAME(NAME, ID, DEFAULT_CPU_NAME, DEFAULT_CPU_ARCH) \
+ case ARM::ID: return NAME;
+#define ARM_ARCH_ALIAS(NAME, ID) /* empty */
+#include "ARMArchName.def"
+ }
+ return NULL;
+}
+
+static const char *GetArchDefaultCPUName(unsigned ID) {
+ switch (ID) {
+ default:
+ llvm_unreachable("Unknown ARCH kind");
+ break;
+#define ARM_ARCH_NAME(NAME, ID, DEFAULT_CPU_NAME, DEFAULT_CPU_ARCH) \
+ case ARM::ID: return DEFAULT_CPU_NAME;
+#define ARM_ARCH_ALIAS(NAME, ID) /* empty */
+#include "ARMArchName.def"
+ }
+ return NULL;
+}
+
+static unsigned GetArchDefaultCPUArch(unsigned ID) {
+ switch (ID) {
+ default:
+ llvm_unreachable("Unknown ARCH kind");
+ break;
+#define ARM_ARCH_NAME(NAME, ID, DEFAULT_CPU_NAME, DEFAULT_CPU_ARCH) \
+ case ARM::ID: return ARMBuildAttrs::DEFAULT_CPU_ARCH;
+#define ARM_ARCH_ALIAS(NAME, ID) /* empty */
+#include "ARMArchName.def"
+ }
+ return 0;
+}
+
namespace {
+class ARMELFStreamer;
+
+class ARMTargetAsmStreamer : public ARMTargetStreamer {
+ formatted_raw_ostream &OS;
+ 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);
+
+public:
+ ARMTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS,
+ MCInstPrinter &InstPrinter, bool VerboseAsm);
+};
+
+ARMTargetAsmStreamer::ARMTargetAsmStreamer(MCStreamer &S,
+ formatted_raw_ostream &OS,
+ MCInstPrinter &InstPrinter,
+ bool VerboseAsm)
+ : ARMTargetStreamer(S), OS(OS), InstPrinter(InstPrinter),
+ IsVerboseAsm(VerboseAsm) {}
+void ARMTargetAsmStreamer::emitFnStart() { OS << "\t.fnstart\n"; }
+void ARMTargetAsmStreamer::emitFnEnd() { OS << "\t.fnend\n"; }
+void ARMTargetAsmStreamer::emitCantUnwind() { OS << "\t.cantunwind\n"; }
+void ARMTargetAsmStreamer::emitPersonality(const MCSymbol *Personality) {
+ OS << "\t.personality " << Personality->getName() << '\n';
+}
+void ARMTargetAsmStreamer::emitPersonalityIndex(unsigned Index) {
+ OS << "\t.personalityindex " << Index << '\n';
+}
+void ARMTargetAsmStreamer::emitHandlerData() { OS << "\t.handlerdata\n"; }
+void ARMTargetAsmStreamer::emitSetFP(unsigned FpReg, unsigned SpReg,
+ int64_t Offset) {
+ OS << "\t.setfp\t";
+ InstPrinter.printRegName(OS, FpReg);
+ OS << ", ";
+ InstPrinter.printRegName(OS, SpReg);
+ if (Offset)
+ OS << ", #" << Offset;
+ OS << '\n';
+}
+void ARMTargetAsmStreamer::emitMovSP(unsigned Reg, int64_t Offset) {
+ assert((Reg != ARM::SP && Reg != ARM::PC) &&
+ "the operand of .movsp cannot be either sp or pc");
+
+ OS << "\t.movsp\t";
+ InstPrinter.printRegName(OS, Reg);
+ if (Offset)
+ OS << ", #" << Offset;
+ OS << '\n';
+}
+void ARMTargetAsmStreamer::emitPad(int64_t Offset) {
+ OS << "\t.pad\t#" << Offset << '\n';
+}
+void ARMTargetAsmStreamer::emitRegSave(const SmallVectorImpl<unsigned> &RegList,
+ bool isVector) {
+ assert(RegList.size() && "RegList should not be empty");
+ if (isVector)
+ OS << "\t.vsave\t{";
+ else
+ OS << "\t.save\t{";
+
+ InstPrinter.printRegName(OS, RegList[0]);
+
+ for (unsigned i = 1, e = RegList.size(); i != e; ++i) {
+ OS << ", ";
+ InstPrinter.printRegName(OS, RegList[i]);
+ }
+
+ OS << "}\n";
+}
+void ARMTargetAsmStreamer::switchVendor(StringRef Vendor) {
+}
+void ARMTargetAsmStreamer::emitAttribute(unsigned Attribute, unsigned Value) {
+ OS << "\t.eabi_attribute\t" << Attribute << ", " << Twine(Value);
+ if (IsVerboseAsm) {
+ StringRef Name = ARMBuildAttrs::AttrTypeAsString(Attribute);
+ if (!Name.empty())
+ OS << "\t@ " << Name;
+ }
+ OS << "\n";
+}
+void ARMTargetAsmStreamer::emitTextAttribute(unsigned Attribute,
+ StringRef String) {
+ switch (Attribute) {
+ case ARMBuildAttrs::CPU_name:
+ OS << "\t.cpu\t" << String.lower();
+ break;
+ default:
+ OS << "\t.eabi_attribute\t" << Attribute << ", \"" << String << "\"";
+ if (IsVerboseAsm) {
+ StringRef Name = ARMBuildAttrs::AttrTypeAsString(Attribute);
+ if (!Name.empty())
+ OS << "\t@ " << Name;
+ }
+ break;
+ }
+ OS << "\n";
+}
+void ARMTargetAsmStreamer::emitIntTextAttribute(unsigned Attribute,
+ unsigned IntValue,
+ StringRef StringValue) {
+ switch (Attribute) {
+ default: llvm_unreachable("unsupported multi-value attribute in asm mode");
+ case ARMBuildAttrs::compatibility:
+ OS << "\t.eabi_attribute\t" << Attribute << ", " << IntValue;
+ if (!StringValue.empty())
+ OS << ", \"" << StringValue << "\"";
+ if (IsVerboseAsm)
+ OS << "\t@ " << ARMBuildAttrs::AttrTypeAsString(Attribute);
+ break;
+ }
+ OS << "\n";
+}
+void ARMTargetAsmStreamer::emitArch(unsigned Arch) {
+ OS << "\t.arch\t" << GetArchName(Arch) << "\n";
+}
+void ARMTargetAsmStreamer::emitObjectArch(unsigned Arch) {
+ OS << "\t.object_arch\t" << GetArchName(Arch) << '\n';
+}
+void ARMTargetAsmStreamer::emitFPU(unsigned FPU) {
+ OS << "\t.fpu\t" << GetFPUName(FPU) << "\n";
+}
+void ARMTargetAsmStreamer::finishAttributeSection() {
+}
+void
+ARMTargetAsmStreamer::AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *S) {
+ OS << "\t.tlsdescseq\t" << S->getSymbol().getName();
+}
+
+void ARMTargetAsmStreamer::emitInst(uint32_t Inst, char Suffix) {
+ OS << "\t.inst";
+ if (Suffix)
+ OS << "." << Suffix;
+ OS << "\t0x" << utohexstr(Inst) << "\n";
+}
+
+void ARMTargetAsmStreamer::emitUnwindRaw(int64_t Offset,
+ const SmallVectorImpl<uint8_t> &Opcodes) {
+ OS << "\t.unwind_raw " << Offset;
+ for (SmallVectorImpl<uint8_t>::const_iterator OCI = Opcodes.begin(),
+ OCE = Opcodes.end();
+ OCI != OCE; ++OCI)
+ OS << ", 0x" << utohexstr(*OCI);
+ OS << '\n';
+}
+
+class ARMTargetELFStreamer : public ARMTargetStreamer {
+private:
+ // This structure holds all attributes, accounting for
+ // their string/numeric value, so we can later emmit them
+ // in declaration order, keeping all in the same vector
+ struct AttributeItem {
+ enum {
+ HiddenAttribute = 0,
+ NumericAttribute,
+ TextAttribute,
+ NumericAndTextAttributes
+ } Type;
+ unsigned Tag;
+ unsigned IntValue;
+ StringRef StringValue;
+
+ static bool LessTag(const AttributeItem &LHS, const AttributeItem &RHS) {
+ return (LHS.Tag < RHS.Tag);
+ }
+ };
+
+ StringRef CurrentVendor;
+ unsigned FPU;
+ unsigned Arch;
+ unsigned EmittedArch;
+ SmallVector<AttributeItem, 64> Contents;
+
+ const MCSection *AttributeSection;
+
+ AttributeItem *getAttributeItem(unsigned Attribute) {
+ for (size_t i = 0; i < Contents.size(); ++i)
+ if (Contents[i].Tag == Attribute)
+ return &Contents[i];
+ return 0;
+ }
+
+ void setAttributeItem(unsigned Attribute, unsigned Value,
+ bool OverwriteExisting) {
+ // Look for existing attribute item
+ if (AttributeItem *Item = getAttributeItem(Attribute)) {
+ if (!OverwriteExisting)
+ return;
+ Item->Type = AttributeItem::NumericAttribute;
+ Item->IntValue = Value;
+ return;
+ }
+
+ // Create new attribute item
+ AttributeItem Item = {
+ AttributeItem::NumericAttribute,
+ Attribute,
+ Value,
+ StringRef("")
+ };
+ Contents.push_back(Item);
+ }
+
+ void setAttributeItem(unsigned Attribute, StringRef Value,
+ bool OverwriteExisting) {
+ // Look for existing attribute item
+ if (AttributeItem *Item = getAttributeItem(Attribute)) {
+ if (!OverwriteExisting)
+ return;
+ Item->Type = AttributeItem::TextAttribute;
+ Item->StringValue = Value;
+ return;
+ }
+
+ // Create new attribute item
+ AttributeItem Item = {
+ AttributeItem::TextAttribute,
+ Attribute,
+ 0,
+ Value
+ };
+ Contents.push_back(Item);
+ }
+
+ void setAttributeItems(unsigned Attribute, unsigned IntValue,
+ StringRef StringValue, bool OverwriteExisting) {
+ // Look for existing attribute item
+ if (AttributeItem *Item = getAttributeItem(Attribute)) {
+ if (!OverwriteExisting)
+ return;
+ Item->Type = AttributeItem::NumericAndTextAttributes;
+ Item->IntValue = IntValue;
+ Item->StringValue = StringValue;
+ return;
+ }
+
+ // Create new attribute item
+ AttributeItem Item = {
+ AttributeItem::NumericAndTextAttributes,
+ Attribute,
+ IntValue,
+ StringValue
+ };
+ Contents.push_back(Item);
+ }
+
+ void emitArchDefaultAttributes();
+ void emitFPUDefaultAttributes();
+
+ 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);
+
+ size_t calculateContentSize() const;
+
+public:
+ ARMTargetELFStreamer(MCStreamer &S)
+ : ARMTargetStreamer(S), CurrentVendor("aeabi"), FPU(ARM::INVALID_FPU),
+ Arch(ARM::INVALID_ARCH), EmittedArch(ARM::INVALID_ARCH),
+ AttributeSection(0) {}
+};
+
/// Extend the generic ELFStreamer class so that it can emit mapping symbols at
/// the appropriate points in the object files. These symbols are defined in the
/// ARM ELF ABI: infocenter.arm.com/help/topic/com.arm.../IHI0044D_aaelf.pdf.
/// by MachO. Beware!
class ARMELFStreamer : public MCELFStreamer {
public:
+ friend class ARMTargetELFStreamer;
+
ARMELFStreamer(MCContext &Context, MCAsmBackend &TAB, raw_ostream &OS,
MCCodeEmitter *Emitter, bool IsThumb)
: MCELFStreamer(Context, TAB, OS, Emitter), IsThumb(IsThumb),
~ARMELFStreamer() {}
+ virtual void FinishImpl();
+
// ARM exception handling directives
- virtual void EmitFnStart();
- virtual void EmitFnEnd();
- virtual void EmitCantUnwind();
- virtual void EmitPersonality(const MCSymbol *Per);
- virtual void EmitHandlerData();
- virtual void EmitSetFP(unsigned NewFpReg,
- unsigned NewSpReg,
- int64_t Offset = 0);
- virtual void EmitPad(int64_t Offset);
- virtual void EmitRegSave(const SmallVectorImpl<unsigned> &RegList,
- bool isVector);
+ void emitFnStart();
+ void emitFnEnd();
+ void emitCantUnwind();
+ void emitPersonality(const MCSymbol *Per);
+ void emitPersonalityIndex(unsigned index);
+ void emitHandlerData();
+ void emitSetFP(unsigned NewFpReg, unsigned NewSpReg, int64_t Offset = 0);
+ void emitMovSP(unsigned Reg, int64_t Offset = 0);
+ void emitPad(int64_t Offset);
+ 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) {
/// 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) {
+ virtual void EmitInstruction(const MCInst& Inst, const MCSubtargetInfo &STI) {
if (IsThumb)
EmitThumbMappingSymbol();
else
EmitARMMappingSymbol();
- MCELFStreamer::EmitInstruction(Inst);
+ MCELFStreamer::EmitInstruction(Inst, STI);
+ }
+
+ virtual void emitInst(uint32_t Inst, char Suffix) {
+ unsigned Size;
+ char Buffer[4];
+ const bool LittleEndian = getContext().getAsmInfo()->isLittleEndian();
+
+ switch (Suffix) {
+ case '\0':
+ Size = 4;
+
+ assert(!IsThumb);
+ EmitARMMappingSymbol();
+ for (unsigned II = 0, IE = Size; II != IE; II++) {
+ const unsigned I = LittleEndian ? (Size - II - 1) : II;
+ Buffer[Size - II - 1] = uint8_t(Inst >> I * CHAR_BIT);
+ }
+
+ break;
+ case 'n':
+ case 'w':
+ Size = (Suffix == 'n' ? 2 : 4);
+
+ assert(IsThumb);
+ EmitThumbMappingSymbol();
+ for (unsigned II = 0, IE = Size; II != IE; II = II + 2) {
+ const unsigned I0 = LittleEndian ? II + 0 : (Size - II - 1);
+ const unsigned I1 = LittleEndian ? II + 1 : (Size - II - 2);
+ Buffer[Size - II - 2] = uint8_t(Inst >> I0 * CHAR_BIT);
+ Buffer[Size - II - 1] = uint8_t(Inst >> I1 * CHAR_BIT);
+ }
+
+ break;
+ default:
+ llvm_unreachable("Invalid Suffix");
+ }
+
+ MCELFStreamer::EmitBytes(StringRef(Buffer, Size));
}
/// This is one of the functions used to emit data into an ELF section, so the
void SwitchToExTabSection(const MCSymbol &FnStart);
void SwitchToExIdxSection(const MCSymbol &FnStart);
+ void EmitFixup(const MCExpr *Expr, MCFixupKind Kind);
+
bool IsThumb;
int64_t MappingSymbolCounter;
};
} // end anonymous namespace
+ARMELFStreamer &ARMTargetELFStreamer::getStreamer() {
+ return static_cast<ARMELFStreamer &>(Streamer);
+}
+
+void ARMTargetELFStreamer::emitFnStart() { getStreamer().emitFnStart(); }
+void ARMTargetELFStreamer::emitFnEnd() { getStreamer().emitFnEnd(); }
+void ARMTargetELFStreamer::emitCantUnwind() { getStreamer().emitCantUnwind(); }
+void ARMTargetELFStreamer::emitPersonality(const MCSymbol *Personality) {
+ getStreamer().emitPersonality(Personality);
+}
+void ARMTargetELFStreamer::emitPersonalityIndex(unsigned Index) {
+ getStreamer().emitPersonalityIndex(Index);
+}
+void ARMTargetELFStreamer::emitHandlerData() {
+ getStreamer().emitHandlerData();
+}
+void ARMTargetELFStreamer::emitSetFP(unsigned FpReg, unsigned SpReg,
+ int64_t Offset) {
+ getStreamer().emitSetFP(FpReg, SpReg, Offset);
+}
+void ARMTargetELFStreamer::emitMovSP(unsigned Reg, int64_t Offset) {
+ getStreamer().emitMovSP(Reg, Offset);
+}
+void ARMTargetELFStreamer::emitPad(int64_t Offset) {
+ getStreamer().emitPad(Offset);
+}
+void ARMTargetELFStreamer::emitRegSave(const SmallVectorImpl<unsigned> &RegList,
+ bool isVector) {
+ getStreamer().emitRegSave(RegList, isVector);
+}
+void ARMTargetELFStreamer::emitUnwindRaw(int64_t Offset,
+ const SmallVectorImpl<uint8_t> &Opcodes) {
+ getStreamer().emitUnwindRaw(Offset, Opcodes);
+}
+void ARMTargetELFStreamer::switchVendor(StringRef Vendor) {
+ assert(!Vendor.empty() && "Vendor cannot be empty.");
+
+ if (CurrentVendor == Vendor)
+ return;
+
+ if (!CurrentVendor.empty())
+ finishAttributeSection();
+
+ assert(Contents.empty() &&
+ ".ARM.attributes should be flushed before changing vendor");
+ CurrentVendor = Vendor;
+
+}
+void ARMTargetELFStreamer::emitAttribute(unsigned Attribute, unsigned Value) {
+ setAttributeItem(Attribute, Value, /* OverwriteExisting= */ true);
+}
+void ARMTargetELFStreamer::emitTextAttribute(unsigned Attribute,
+ StringRef Value) {
+ setAttributeItem(Attribute, Value, /* OverwriteExisting= */ true);
+}
+void ARMTargetELFStreamer::emitIntTextAttribute(unsigned Attribute,
+ unsigned IntValue,
+ StringRef StringValue) {
+ setAttributeItems(Attribute, IntValue, StringValue,
+ /* OverwriteExisting= */ true);
+}
+void ARMTargetELFStreamer::emitArch(unsigned Value) {
+ Arch = Value;
+}
+void ARMTargetELFStreamer::emitObjectArch(unsigned Value) {
+ EmittedArch = Value;
+}
+void ARMTargetELFStreamer::emitArchDefaultAttributes() {
+ using namespace ARMBuildAttrs;
+
+ setAttributeItem(CPU_name, GetArchDefaultCPUName(Arch), false);
+ if (EmittedArch == ARM::INVALID_ARCH)
+ setAttributeItem(CPU_arch, GetArchDefaultCPUArch(Arch), false);
+ else
+ setAttributeItem(CPU_arch, GetArchDefaultCPUArch(EmittedArch), false);
+
+ switch (Arch) {
+ case ARM::ARMV2:
+ case ARM::ARMV2A:
+ case ARM::ARMV3:
+ case ARM::ARMV3M:
+ case ARM::ARMV4:
+ case ARM::ARMV5:
+ setAttributeItem(ARM_ISA_use, Allowed, false);
+ break;
+
+ case ARM::ARMV4T:
+ case ARM::ARMV5T:
+ case ARM::ARMV5TE:
+ case ARM::ARMV6:
+ case ARM::ARMV6J:
+ setAttributeItem(ARM_ISA_use, Allowed, false);
+ setAttributeItem(THUMB_ISA_use, Allowed, false);
+ break;
+
+ case ARM::ARMV6T2:
+ setAttributeItem(ARM_ISA_use, Allowed, false);
+ setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+ break;
+
+ case ARM::ARMV6Z:
+ case ARM::ARMV6ZK:
+ setAttributeItem(ARM_ISA_use, Allowed, false);
+ setAttributeItem(THUMB_ISA_use, Allowed, false);
+ setAttributeItem(Virtualization_use, AllowTZ, false);
+ break;
+
+ case ARM::ARMV6M:
+ setAttributeItem(THUMB_ISA_use, Allowed, false);
+ break;
+
+ case ARM::ARMV7:
+ setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+ break;
+
+ case ARM::ARMV7A:
+ setAttributeItem(CPU_arch_profile, ApplicationProfile, false);
+ setAttributeItem(ARM_ISA_use, Allowed, false);
+ setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+ break;
+
+ case ARM::ARMV7R:
+ setAttributeItem(CPU_arch_profile, RealTimeProfile, false);
+ setAttributeItem(ARM_ISA_use, Allowed, false);
+ setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+ break;
+
+ case ARM::ARMV7M:
+ setAttributeItem(CPU_arch_profile, MicroControllerProfile, false);
+ setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+ break;
+
+ case ARM::ARMV8A:
+ setAttributeItem(CPU_arch_profile, ApplicationProfile, false);
+ setAttributeItem(ARM_ISA_use, Allowed, false);
+ setAttributeItem(THUMB_ISA_use, AllowThumb32, false);
+ setAttributeItem(MPextension_use, Allowed, false);
+ setAttributeItem(Virtualization_use, AllowTZVirtualization, false);
+ break;
+
+ case ARM::IWMMXT:
+ setAttributeItem(ARM_ISA_use, Allowed, false);
+ setAttributeItem(THUMB_ISA_use, Allowed, false);
+ setAttributeItem(WMMX_arch, AllowWMMXv1, false);
+ break;
+
+ case ARM::IWMMXT2:
+ setAttributeItem(ARM_ISA_use, Allowed, false);
+ setAttributeItem(THUMB_ISA_use, Allowed, false);
+ setAttributeItem(WMMX_arch, AllowWMMXv2, false);
+ break;
+
+ default:
+ report_fatal_error("Unknown Arch: " + Twine(Arch));
+ break;
+ }
+}
+void ARMTargetELFStreamer::emitFPU(unsigned Value) {
+ FPU = Value;
+}
+void ARMTargetELFStreamer::emitFPUDefaultAttributes() {
+ switch (FPU) {
+ case ARM::VFP:
+ case ARM::VFPV2:
+ setAttributeItem(ARMBuildAttrs::FP_arch,
+ ARMBuildAttrs::AllowFPv2,
+ /* OverwriteExisting= */ false);
+ break;
+
+ case ARM::VFPV3:
+ setAttributeItem(ARMBuildAttrs::FP_arch,
+ ARMBuildAttrs::AllowFPv3A,
+ /* OverwriteExisting= */ false);
+ break;
+
+ case ARM::VFPV3_D16:
+ setAttributeItem(ARMBuildAttrs::FP_arch,
+ ARMBuildAttrs::AllowFPv3B,
+ /* OverwriteExisting= */ false);
+ break;
+
+ case ARM::VFPV4:
+ setAttributeItem(ARMBuildAttrs::FP_arch,
+ ARMBuildAttrs::AllowFPv4A,
+ /* OverwriteExisting= */ false);
+ break;
+
+ case ARM::VFPV4_D16:
+ setAttributeItem(ARMBuildAttrs::FP_arch,
+ ARMBuildAttrs::AllowFPv4B,
+ /* OverwriteExisting= */ false);
+ break;
+
+ case ARM::FP_ARMV8:
+ setAttributeItem(ARMBuildAttrs::FP_arch,
+ ARMBuildAttrs::AllowFPARMv8A,
+ /* OverwriteExisting= */ false);
+ break;
+
+ case ARM::NEON:
+ setAttributeItem(ARMBuildAttrs::FP_arch,
+ ARMBuildAttrs::AllowFPv3A,
+ /* OverwriteExisting= */ false);
+ setAttributeItem(ARMBuildAttrs::Advanced_SIMD_arch,
+ ARMBuildAttrs::AllowNeon,
+ /* OverwriteExisting= */ false);
+ break;
+
+ case ARM::NEON_VFPV4:
+ setAttributeItem(ARMBuildAttrs::FP_arch,
+ ARMBuildAttrs::AllowFPv4A,
+ /* OverwriteExisting= */ false);
+ setAttributeItem(ARMBuildAttrs::Advanced_SIMD_arch,
+ ARMBuildAttrs::AllowNeon2,
+ /* OverwriteExisting= */ false);
+ break;
+
+ case ARM::NEON_FP_ARMV8:
+ case ARM::CRYPTO_NEON_FP_ARMV8:
+ setAttributeItem(ARMBuildAttrs::FP_arch,
+ ARMBuildAttrs::AllowFPARMv8A,
+ /* OverwriteExisting= */ false);
+ setAttributeItem(ARMBuildAttrs::Advanced_SIMD_arch,
+ ARMBuildAttrs::AllowNeonARMv8,
+ /* OverwriteExisting= */ false);
+ break;
+
+ case ARM::SOFTVFP:
+ break;
+
+ default:
+ report_fatal_error("Unknown FPU: " + Twine(FPU));
+ break;
+ }
+}
+size_t ARMTargetELFStreamer::calculateContentSize() const {
+ size_t Result = 0;
+ for (size_t i = 0; i < Contents.size(); ++i) {
+ AttributeItem item = Contents[i];
+ switch (item.Type) {
+ case AttributeItem::HiddenAttribute:
+ break;
+ case AttributeItem::NumericAttribute:
+ Result += getULEB128Size(item.Tag);
+ Result += getULEB128Size(item.IntValue);
+ break;
+ case AttributeItem::TextAttribute:
+ Result += getULEB128Size(item.Tag);
+ Result += item.StringValue.size() + 1; // string + '\0'
+ break;
+ case AttributeItem::NumericAndTextAttributes:
+ Result += getULEB128Size(item.Tag);
+ Result += getULEB128Size(item.IntValue);
+ Result += item.StringValue.size() + 1; // string + '\0';
+ break;
+ }
+ }
+ return Result;
+}
+void ARMTargetELFStreamer::finishAttributeSection() {
+ // <format-version>
+ // [ <section-length> "vendor-name"
+ // [ <file-tag> <size> <attribute>*
+ // | <section-tag> <size> <section-number>* 0 <attribute>*
+ // | <symbol-tag> <size> <symbol-number>* 0 <attribute>*
+ // ]+
+ // ]*
+
+ if (FPU != ARM::INVALID_FPU)
+ emitFPUDefaultAttributes();
+
+ if (Arch != ARM::INVALID_ARCH)
+ emitArchDefaultAttributes();
+
+ if (Contents.empty())
+ return;
+
+ std::sort(Contents.begin(), Contents.end(), AttributeItem::LessTag);
+
+ ARMELFStreamer &Streamer = getStreamer();
+
+ // Switch to .ARM.attributes section
+ if (AttributeSection) {
+ Streamer.SwitchSection(AttributeSection);
+ } else {
+ AttributeSection =
+ Streamer.getContext().getELFSection(".ARM.attributes",
+ ELF::SHT_ARM_ATTRIBUTES,
+ 0,
+ SectionKind::getMetadata());
+ Streamer.SwitchSection(AttributeSection);
+
+ // Format version
+ Streamer.EmitIntValue(0x41, 1);
+ }
+
+ // Vendor size + Vendor name + '\0'
+ const size_t VendorHeaderSize = 4 + CurrentVendor.size() + 1;
+
+ // Tag + Tag Size
+ const size_t TagHeaderSize = 1 + 4;
+
+ const size_t ContentsSize = calculateContentSize();
+
+ Streamer.EmitIntValue(VendorHeaderSize + TagHeaderSize + ContentsSize, 4);
+ Streamer.EmitBytes(CurrentVendor);
+ Streamer.EmitIntValue(0, 1); // '\0'
+
+ Streamer.EmitIntValue(ARMBuildAttrs::File, 1);
+ Streamer.EmitIntValue(TagHeaderSize + ContentsSize, 4);
+
+ // Size should have been accounted for already, now
+ // emit each field as its type (ULEB or String)
+ for (size_t i = 0; i < Contents.size(); ++i) {
+ AttributeItem item = Contents[i];
+ Streamer.EmitULEB128IntValue(item.Tag);
+ switch (item.Type) {
+ default: llvm_unreachable("Invalid attribute type");
+ case AttributeItem::NumericAttribute:
+ Streamer.EmitULEB128IntValue(item.IntValue);
+ break;
+ case AttributeItem::TextAttribute:
+ Streamer.EmitBytes(item.StringValue.upper());
+ Streamer.EmitIntValue(0, 1); // '\0'
+ break;
+ case AttributeItem::NumericAndTextAttributes:
+ Streamer.EmitULEB128IntValue(item.IntValue);
+ Streamer.EmitBytes(item.StringValue.upper());
+ Streamer.EmitIntValue(0, 1); // '\0'
+ break;
+ }
+ }
+
+ Contents.clear();
+ FPU = ARM::INVALID_FPU;
+}
+void
+ARMTargetELFStreamer::AnnotateTLSDescriptorSequence(const MCSymbolRefExpr *S) {
+ getStreamer().EmitFixup(S, FK_Data_4);
+}
+void ARMTargetELFStreamer::emitInst(uint32_t Inst, char Suffix) {
+ getStreamer().emitInst(Inst, Suffix);
+}
+
+void ARMELFStreamer::FinishImpl() {
+ MCTargetStreamer &TS = *getTargetStreamer();
+ ARMTargetStreamer &ATS = static_cast<ARMTargetStreamer &>(TS);
+ ATS.finishAttributeSection();
+
+ MCELFStreamer::FinishImpl();
+}
+
inline void ARMELFStreamer::SwitchToEHSection(const char *Prefix,
unsigned Type,
unsigned Flags,
// Switch to .ARM.extab or .ARM.exidx section
SwitchSection(EHSection);
- EmitCodeAlignment(4, 0);
+ EmitCodeAlignment(4);
}
inline void ARMELFStreamer::SwitchToExTabSection(const MCSymbol &FnStart) {
SectionKind::getDataRel(),
FnStart);
}
+void ARMELFStreamer::EmitFixup(const MCExpr *Expr, MCFixupKind Kind) {
+ MCDataFragment *Frag = getOrCreateDataFragment();
+ Frag->getFixups().push_back(MCFixup::Create(Frag->getContents().size(), Expr,
+ Kind));
+}
void ARMELFStreamer::Reset() {
ExTab = NULL;
FnStart = NULL;
Personality = NULL;
- PersonalityIndex = NUM_PERSONALITY_INDEX;
+ PersonalityIndex = ARM::EHABI::NUM_PERSONALITY_INDEX;
FPReg = ARM::SP;
FPOffset = 0;
SPOffset = 0;
UnwindOpAsm.Reset();
}
-// Add the R_ARM_NONE fixup at the same position
-void ARMELFStreamer::EmitPersonalityFixup(StringRef Name) {
- const MCSymbol *PersonalitySym = getContext().GetOrCreateSymbol(Name);
-
- const MCSymbolRefExpr *PersonalityRef =
- MCSymbolRefExpr::Create(PersonalitySym,
- MCSymbolRefExpr::VK_ARM_NONE,
- getContext());
-
- AddValueSymbols(PersonalityRef);
- MCDataFragment *DF = getOrCreateDataFragment();
- DF->getFixups().push_back(
- MCFixup::Create(DF->getContents().size(), PersonalityRef,
- MCFixup::getKindForSize(4, false)));
-}
-
-void ARMELFStreamer::EmitFnStart() {
+void ARMELFStreamer::emitFnStart() {
assert(FnStart == 0);
FnStart = getContext().CreateTempSymbol();
EmitLabel(FnStart);
}
-void ARMELFStreamer::EmitFnEnd() {
- assert(FnStart && ".fnstart must preceeds .fnend");
+void ARMELFStreamer::emitFnEnd() {
+ assert(FnStart && ".fnstart must precedes .fnend");
// Emit unwind opcodes if there is no .handlerdata directive
if (!ExTab && !CantUnwind)
// Emit the exception index table entry
SwitchToExIdxSection(*FnStart);
- if (PersonalityIndex < NUM_PERSONALITY_INDEX)
+ if (PersonalityIndex < ARM::EHABI::NUM_PERSONALITY_INDEX)
EmitPersonalityFixup(GetAEABIUnwindPersonalityName(PersonalityIndex));
const MCSymbolRefExpr *FnStartRef =
EmitValue(FnStartRef, 4);
if (CantUnwind) {
- EmitIntValue(EXIDX_CANTUNWIND, 4);
+ EmitIntValue(ARM::EHABI::EXIDX_CANTUNWIND, 4);
} else if (ExTab) {
// Emit a reference to the unwind opcodes in the ".ARM.extab" section.
const MCSymbolRefExpr *ExTabEntryRef =
// For the __aeabi_unwind_cpp_pr0, we have to emit the unwind opcodes in
// the second word of exception index table entry. The size of the unwind
// opcodes should always be 4 bytes.
- assert(PersonalityIndex == AEABI_UNWIND_CPP_PR0 &&
+ assert(PersonalityIndex == ARM::EHABI::AEABI_UNWIND_CPP_PR0 &&
"Compact model must use __aeabi_cpp_unwind_pr0 as personality");
assert(Opcodes.size() == 4u &&
"Unwind opcode size for __aeabi_cpp_unwind_pr0 must be equal to 4");
Reset();
}
-void ARMELFStreamer::EmitCantUnwind() {
- CantUnwind = true;
+void ARMELFStreamer::emitCantUnwind() { CantUnwind = true; }
+
+// Add the R_ARM_NONE fixup at the same position
+void ARMELFStreamer::EmitPersonalityFixup(StringRef Name) {
+ const MCSymbol *PersonalitySym = getContext().GetOrCreateSymbol(Name);
+
+ const MCSymbolRefExpr *PersonalityRef = MCSymbolRefExpr::Create(
+ PersonalitySym, MCSymbolRefExpr::VK_ARM_NONE, getContext());
+
+ AddValueSymbols(PersonalityRef);
+ MCDataFragment *DF = getOrCreateDataFragment();
+ DF->getFixups().push_back(MCFixup::Create(DF->getContents().size(),
+ PersonalityRef,
+ MCFixup::getKindForSize(4, false)));
}
void ARMELFStreamer::FlushPendingOffset() {
// For compact model 0, we have to emit the unwind opcodes in the .ARM.exidx
// section. Thus, we don't have to create an entry in the .ARM.extab
// section.
- if (NoHandlerData && PersonalityIndex == AEABI_UNWIND_CPP_PR0)
+ if (NoHandlerData && PersonalityIndex == ARM::EHABI::AEABI_UNWIND_CPP_PR0)
return;
// Switch to .ARM.extab section.
EmitIntValue(0, 4);
}
-void ARMELFStreamer::EmitHandlerData() {
- FlushUnwindOpcodes(false);
-}
+void ARMELFStreamer::emitHandlerData() { FlushUnwindOpcodes(false); }
-void ARMELFStreamer::EmitPersonality(const MCSymbol *Per) {
+void ARMELFStreamer::emitPersonality(const MCSymbol *Per) {
Personality = Per;
UnwindOpAsm.setPersonality(Per);
}
-void ARMELFStreamer::EmitSetFP(unsigned NewFPReg,
- unsigned NewSPReg,
+void ARMELFStreamer::emitPersonalityIndex(unsigned Index) {
+ assert(Index < ARM::EHABI::NUM_PERSONALITY_INDEX && "invalid index");
+ PersonalityIndex = Index;
+}
+
+void ARMELFStreamer::emitSetFP(unsigned NewFPReg, unsigned NewSPReg,
int64_t Offset) {
assert((NewSPReg == ARM::SP || NewSPReg == FPReg) &&
"the operand of .setfp directive should be either $sp or $fp");
FPOffset += Offset;
}
-void ARMELFStreamer::EmitPad(int64_t Offset) {
+void ARMELFStreamer::emitMovSP(unsigned Reg, int64_t Offset) {
+ assert((Reg != ARM::SP && Reg != ARM::PC) &&
+ "the operand of .movsp cannot be either sp or pc");
+ assert(FPReg == ARM::SP && "current FP must be SP");
+
+ FlushPendingOffset();
+
+ FPReg = Reg;
+ FPOffset = SPOffset + Offset;
+
+ const MCRegisterInfo *MRI = getContext().getRegisterInfo();
+ UnwindOpAsm.EmitSetSP(MRI->getEncodingValue(FPReg));
+}
+
+void ARMELFStreamer::emitPad(int64_t Offset) {
// Track the change of the $sp offset
SPOffset -= Offset;
PendingOffset -= Offset;
}
-void ARMELFStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList,
+void ARMELFStreamer::emitRegSave(const SmallVectorImpl<unsigned> &RegList,
bool IsVector) {
// Collect the registers in the register list
unsigned Count = 0;
UnwindOpAsm.EmitRegSave(Mask);
}
+void ARMELFStreamer::emitUnwindRaw(int64_t Offset,
+ const SmallVectorImpl<uint8_t> &Opcodes) {
+ FlushPendingOffset();
+ SPOffset = SPOffset - Offset;
+ UnwindOpAsm.EmitRaw(Opcodes);
+}
+
namespace llvm {
+
+MCStreamer *createMCAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
+ bool isVerboseAsm, bool useCFI,
+ bool useDwarfDirectory,
+ MCInstPrinter *InstPrint, MCCodeEmitter *CE,
+ MCAsmBackend *TAB, bool ShowInst) {
+ MCStreamer *S =
+ llvm::createAsmStreamer(Ctx, OS, isVerboseAsm, useCFI, 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) {
ARMELFStreamer *S = new ARMELFStreamer(Context, TAB, OS, Emitter, IsThumb);
+ new ARMTargetELFStreamer(*S);
// FIXME: This should eventually end up somewhere else where more
// intelligent flag decisions can be made. For now we are just maintaining
// the status quo for ARM and setting EF_ARM_EABI_VER5 as the default.
projects / oota-llvm.git / blobdiff