#ifndef LLVM_MC_MCASSEMBLER_H
#define LLVM_MC_MCASSEMBLER_H
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/DenseSet.h"
-#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/ilist.h"
#include "llvm/ADT/ilist_node.h"
#include "llvm/ADT/iterator.h"
#include "llvm/MC/MCDirectives.h"
+#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCFixup.h"
+#include "llvm/MC/MCFragment.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCLinkerOptimizationHint.h"
-#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/DataTypes.h"
-#include <algorithm>
-#include <vector> // FIXME: Shouldn't be needed.
namespace llvm {
class raw_ostream;
class MCValue;
class MCAsmBackend;
-class MCFragment : public ilist_node<MCFragment> {
- friend class MCAsmLayout;
-
- MCFragment(const MCFragment &) = delete;
- void operator=(const MCFragment &) = delete;
-
-public:
- enum FragmentType {
- FT_Align,
- FT_Data,
- FT_CompactEncodedInst,
- FT_Fill,
- FT_Relaxable,
- FT_Org,
- FT_Dwarf,
- FT_DwarfFrame,
- FT_LEB
- };
-
-private:
- FragmentType Kind;
-
- /// The data for the section this fragment is in.
- MCSection *Parent;
-
- /// Atom - The atom this fragment is in, as represented by it's defining
- /// symbol.
- const MCSymbol *Atom;
-
- /// \name Assembler Backend Data
- /// @{
- //
- // FIXME: This could all be kept private to the assembler implementation.
-
- /// Offset - The offset of this fragment in its section. This is ~0 until
- /// initialized.
- uint64_t Offset;
-
- /// LayoutOrder - The layout order of this fragment.
- unsigned LayoutOrder;
-
- /// @}
-
-protected:
- MCFragment(FragmentType Kind, MCSection *Parent = nullptr);
-
-public:
- // Only for sentinel.
- MCFragment();
- virtual ~MCFragment();
-
- FragmentType getKind() const { return Kind; }
-
- MCSection *getParent() const { return Parent; }
- void setParent(MCSection *Value) { Parent = Value; }
-
- const MCSymbol *getAtom() const { return Atom; }
- void setAtom(const MCSymbol *Value) { Atom = Value; }
-
- unsigned getLayoutOrder() const { return LayoutOrder; }
- void setLayoutOrder(unsigned Value) { LayoutOrder = Value; }
-
- /// \brief Does this fragment have instructions emitted into it? By default
- /// this is false, but specific fragment types may set it to true.
- virtual bool hasInstructions() const { return false; }
-
- /// \brief Should this fragment be placed at the end of an aligned bundle?
- virtual bool alignToBundleEnd() const { return false; }
- virtual void setAlignToBundleEnd(bool V) {}
-
- /// \brief Get the padding size that must be inserted before this fragment.
- /// Used for bundling. By default, no padding is inserted.
- /// Note that padding size is restricted to 8 bits. This is an optimization
- /// to reduce the amount of space used for each fragment. In practice, larger
- /// padding should never be required.
- virtual uint8_t getBundlePadding() const { return 0; }
-
- /// \brief Set the padding size for this fragment. By default it's a no-op,
- /// and only some fragments have a meaningful implementation.
- virtual void setBundlePadding(uint8_t N) {}
-
- void dump();
-};
-
-/// Interface implemented by fragments that contain encoded instructions and/or
-/// data.
-///
-class MCEncodedFragment : public MCFragment {
- virtual void anchor();
-
- uint8_t BundlePadding;
-
-public:
- MCEncodedFragment(MCFragment::FragmentType FType, MCSection *Sec = nullptr)
- : MCFragment(FType, Sec), BundlePadding(0) {}
- ~MCEncodedFragment() override;
-
- virtual SmallVectorImpl<char> &getContents() = 0;
- virtual const SmallVectorImpl<char> &getContents() const = 0;
-
- uint8_t getBundlePadding() const override { return BundlePadding; }
-
- void setBundlePadding(uint8_t N) override { BundlePadding = N; }
-
- static bool classof(const MCFragment *F) {
- MCFragment::FragmentType Kind = F->getKind();
- switch (Kind) {
- default:
- return false;
- case MCFragment::FT_Relaxable:
- case MCFragment::FT_CompactEncodedInst:
- case MCFragment::FT_Data:
- return true;
- }
- }
-};
-
-/// Interface implemented by fragments that contain encoded instructions and/or
-/// data and also have fixups registered.
-///
-class MCEncodedFragmentWithFixups : public MCEncodedFragment {
- void anchor() override;
-
-public:
- MCEncodedFragmentWithFixups(MCFragment::FragmentType FType,
- MCSection *Sec = nullptr)
- : MCEncodedFragment(FType, Sec) {}
-
- ~MCEncodedFragmentWithFixups() override;
-
- typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator;
- typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
-
- virtual SmallVectorImpl<MCFixup> &getFixups() = 0;
- virtual const SmallVectorImpl<MCFixup> &getFixups() const = 0;
-
- virtual fixup_iterator fixup_begin() = 0;
- virtual const_fixup_iterator fixup_begin() const = 0;
- virtual fixup_iterator fixup_end() = 0;
- virtual const_fixup_iterator fixup_end() const = 0;
-
- static bool classof(const MCFragment *F) {
- MCFragment::FragmentType Kind = F->getKind();
- return Kind == MCFragment::FT_Relaxable || Kind == MCFragment::FT_Data;
- }
-};
-
-/// Fragment for data and encoded instructions.
-///
-class MCDataFragment : public MCEncodedFragmentWithFixups {
- void anchor() override;
-
- /// \brief Does this fragment contain encoded instructions anywhere in it?
- bool HasInstructions;
-
- /// \brief Should this fragment be aligned to the end of a bundle?
- bool AlignToBundleEnd;
-
- SmallVector<char, 32> Contents;
-
- /// Fixups - The list of fixups in this fragment.
- SmallVector<MCFixup, 4> Fixups;
-
-public:
- MCDataFragment(MCSection *Sec = nullptr)
- : MCEncodedFragmentWithFixups(FT_Data, Sec), HasInstructions(false),
- AlignToBundleEnd(false) {}
-
- SmallVectorImpl<char> &getContents() override { return Contents; }
- const SmallVectorImpl<char> &getContents() const override { return Contents; }
-
- SmallVectorImpl<MCFixup> &getFixups() override { return Fixups; }
-
- const SmallVectorImpl<MCFixup> &getFixups() const override { return Fixups; }
-
- bool hasInstructions() const override { return HasInstructions; }
- virtual void setHasInstructions(bool V) { HasInstructions = V; }
-
- bool alignToBundleEnd() const override { return AlignToBundleEnd; }
- void setAlignToBundleEnd(bool V) override { AlignToBundleEnd = V; }
-
- fixup_iterator fixup_begin() override { return Fixups.begin(); }
- const_fixup_iterator fixup_begin() const override { return Fixups.begin(); }
-
- fixup_iterator fixup_end() override { return Fixups.end(); }
- const_fixup_iterator fixup_end() const override { return Fixups.end(); }
-
- static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_Data;
- }
-};
-
-/// This is a compact (memory-size-wise) fragment for holding an encoded
-/// instruction (non-relaxable) that has no fixups registered. When applicable,
-/// it can be used instead of MCDataFragment and lead to lower memory
-/// consumption.
-///
-class MCCompactEncodedInstFragment : public MCEncodedFragment {
- void anchor() override;
-
- /// \brief Should this fragment be aligned to the end of a bundle?
- bool AlignToBundleEnd;
-
- SmallVector<char, 4> Contents;
-
-public:
- MCCompactEncodedInstFragment(MCSection *Sec = nullptr)
- : MCEncodedFragment(FT_CompactEncodedInst, Sec), AlignToBundleEnd(false) {
- }
-
- bool hasInstructions() const override { return true; }
-
- SmallVectorImpl<char> &getContents() override { return Contents; }
- const SmallVectorImpl<char> &getContents() const override { return Contents; }
-
- bool alignToBundleEnd() const override { return AlignToBundleEnd; }
- void setAlignToBundleEnd(bool V) override { AlignToBundleEnd = V; }
-
- static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_CompactEncodedInst;
- }
-};
-
-/// A relaxable fragment holds on to its MCInst, since it may need to be
-/// relaxed during the assembler layout and relaxation stage.
-///
-class MCRelaxableFragment : public MCEncodedFragmentWithFixups {
- void anchor() override;
-
- /// Inst - The instruction this is a fragment for.
- MCInst Inst;
-
- /// STI - The MCSubtargetInfo in effect when the instruction was encoded.
- /// Keep a copy instead of a reference to make sure that updates to STI
- /// in the assembler are not seen here.
- const MCSubtargetInfo STI;
-
- /// Contents - Binary data for the currently encoded instruction.
- SmallVector<char, 8> Contents;
-
- /// Fixups - The list of fixups in this fragment.
- SmallVector<MCFixup, 1> Fixups;
-
-public:
- MCRelaxableFragment(const MCInst &Inst, const MCSubtargetInfo &STI,
- MCSection *Sec = nullptr)
- : MCEncodedFragmentWithFixups(FT_Relaxable, Sec), Inst(Inst), STI(STI) {}
-
- SmallVectorImpl<char> &getContents() override { return Contents; }
- const SmallVectorImpl<char> &getContents() const override { return Contents; }
-
- const MCInst &getInst() const { return Inst; }
- void setInst(const MCInst &Value) { Inst = Value; }
-
- const MCSubtargetInfo &getSubtargetInfo() { return STI; }
-
- SmallVectorImpl<MCFixup> &getFixups() override { return Fixups; }
-
- const SmallVectorImpl<MCFixup> &getFixups() const override { return Fixups; }
-
- bool hasInstructions() const override { return true; }
-
- fixup_iterator fixup_begin() override { return Fixups.begin(); }
- const_fixup_iterator fixup_begin() const override { return Fixups.begin(); }
-
- fixup_iterator fixup_end() override { return Fixups.end(); }
- const_fixup_iterator fixup_end() const override { return Fixups.end(); }
-
- static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_Relaxable;
- }
-};
-
-class MCAlignFragment : public MCFragment {
- virtual void anchor();
-
- /// Alignment - The alignment to ensure, in bytes.
- unsigned Alignment;
-
- /// Value - Value to use for filling padding bytes.
- int64_t Value;
-
- /// ValueSize - The size of the integer (in bytes) of \p Value.
- unsigned ValueSize;
-
- /// MaxBytesToEmit - The maximum number of bytes to emit; if the alignment
- /// cannot be satisfied in this width then this fragment is ignored.
- unsigned MaxBytesToEmit;
-
- /// EmitNops - Flag to indicate that (optimal) NOPs should be emitted instead
- /// of using the provided value. The exact interpretation of this flag is
- /// target dependent.
- bool EmitNops : 1;
-
-public:
- MCAlignFragment(unsigned Alignment, int64_t Value, unsigned ValueSize,
- unsigned MaxBytesToEmit, MCSection *Sec = nullptr)
- : MCFragment(FT_Align, Sec), Alignment(Alignment), Value(Value),
- ValueSize(ValueSize), MaxBytesToEmit(MaxBytesToEmit), EmitNops(false) {}
-
- /// \name Accessors
- /// @{
-
- unsigned getAlignment() const { return Alignment; }
-
- int64_t getValue() const { return Value; }
-
- unsigned getValueSize() const { return ValueSize; }
-
- unsigned getMaxBytesToEmit() const { return MaxBytesToEmit; }
-
- bool hasEmitNops() const { return EmitNops; }
- void setEmitNops(bool Value) { EmitNops = Value; }
-
- /// @}
-
- static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_Align;
- }
-};
-
-class MCFillFragment : public MCFragment {
- virtual void anchor();
-
- /// Value - Value to use for filling bytes.
- int64_t Value;
-
- /// ValueSize - The size (in bytes) of \p Value to use when filling, or 0 if
- /// this is a virtual fill fragment.
- unsigned ValueSize;
-
- /// Size - The number of bytes to insert.
- uint64_t Size;
-
-public:
- MCFillFragment(int64_t Value, unsigned ValueSize, uint64_t Size,
- MCSection *Sec = nullptr)
- : MCFragment(FT_Fill, Sec), Value(Value), ValueSize(ValueSize),
- Size(Size) {
- assert((!ValueSize || (Size % ValueSize) == 0) &&
- "Fill size must be a multiple of the value size!");
- }
-
- /// \name Accessors
- /// @{
-
- int64_t getValue() const { return Value; }
-
- unsigned getValueSize() const { return ValueSize; }
-
- uint64_t getSize() const { return Size; }
-
- /// @}
-
- static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_Fill;
- }
-};
-
-class MCOrgFragment : public MCFragment {
- virtual void anchor();
-
- /// Offset - The offset this fragment should start at.
- const MCExpr *Offset;
-
- /// Value - Value to use for filling bytes.
- int8_t Value;
-
-public:
- MCOrgFragment(const MCExpr &Offset, int8_t Value, MCSection *Sec = nullptr)
- : MCFragment(FT_Org, Sec), Offset(&Offset), Value(Value) {}
-
- /// \name Accessors
- /// @{
-
- const MCExpr &getOffset() const { return *Offset; }
-
- uint8_t getValue() const { return Value; }
-
- /// @}
-
- static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_Org;
- }
-};
-
-class MCLEBFragment : public MCFragment {
- virtual void anchor();
-
- /// Value - The value this fragment should contain.
- const MCExpr *Value;
-
- /// IsSigned - True if this is a sleb128, false if uleb128.
- bool IsSigned;
-
- SmallString<8> Contents;
-
-public:
- MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSection *Sec = nullptr)
- : MCFragment(FT_LEB, Sec), Value(&Value_), IsSigned(IsSigned_) {
- Contents.push_back(0);
- }
-
- /// \name Accessors
- /// @{
-
- const MCExpr &getValue() const { return *Value; }
-
- bool isSigned() const { return IsSigned; }
-
- SmallString<8> &getContents() { return Contents; }
- const SmallString<8> &getContents() const { return Contents; }
-
- /// @}
-
- static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_LEB;
- }
-};
-
-class MCDwarfLineAddrFragment : public MCFragment {
- virtual void anchor();
-
- /// LineDelta - the value of the difference between the two line numbers
- /// between two .loc dwarf directives.
- int64_t LineDelta;
-
- /// AddrDelta - The expression for the difference of the two symbols that
- /// make up the address delta between two .loc dwarf directives.
- const MCExpr *AddrDelta;
-
- SmallString<8> Contents;
-
-public:
- MCDwarfLineAddrFragment(int64_t LineDelta, const MCExpr &AddrDelta,
- MCSection *Sec = nullptr)
- : MCFragment(FT_Dwarf, Sec), LineDelta(LineDelta), AddrDelta(&AddrDelta) {
- Contents.push_back(0);
- }
-
- /// \name Accessors
- /// @{
-
- int64_t getLineDelta() const { return LineDelta; }
-
- const MCExpr &getAddrDelta() const { return *AddrDelta; }
-
- SmallString<8> &getContents() { return Contents; }
- const SmallString<8> &getContents() const { return Contents; }
-
- /// @}
-
- static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_Dwarf;
- }
-};
-
-class MCDwarfCallFrameFragment : public MCFragment {
- virtual void anchor();
-
- /// AddrDelta - The expression for the difference of the two symbols that
- /// make up the address delta between two .cfi_* dwarf directives.
- const MCExpr *AddrDelta;
-
- SmallString<8> Contents;
-
-public:
- MCDwarfCallFrameFragment(const MCExpr &AddrDelta, MCSection *Sec = nullptr)
- : MCFragment(FT_DwarfFrame, Sec), AddrDelta(&AddrDelta) {
- Contents.push_back(0);
- }
-
- /// \name Accessors
- /// @{
-
- const MCExpr &getAddrDelta() const { return *AddrDelta; }
-
- SmallString<8> &getContents() { return Contents; }
- const SmallString<8> &getContents() const { return Contents; }
-
- /// @}
-
- static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_DwarfFrame;
- }
-};
-
// FIXME: This really doesn't belong here. See comments below.
struct IndirectSymbolData {
MCSymbol *Symbol;
friend class MCAsmLayout;
public:
- typedef SetVector<MCSection *> SectionListType;
+ typedef std::vector<MCSection *> SectionListType;
typedef std::vector<const MCSymbol *> SymbolDataListType;
typedef pointee_iterator<SectionListType::const_iterator> const_iterator;
MCObjectWriter &Writer;
- raw_ostream &OS;
-
SectionListType Sections;
SymbolDataListType Symbols;
- DenseSet<const MCSymbol *> LocalsUsedInReloc;
-
std::vector<IndirectSymbolData> IndirectSymbols;
std::vector<DataRegionData> DataRegions;
/// List of declared file names
std::vector<std::string> FileNames;
+ MCDwarfLineTableParams LTParams;
+
/// The set of function symbols for which a .thumb_func directive has
/// been seen.
//
unsigned RelaxAll : 1;
unsigned SubsectionsViaSymbols : 1;
+ unsigned IncrementalLinkerCompatible : 1;
/// ELF specific e_header flags
// It would be good if there were an MCELFAssembler class to hold this.
MCFragment &F, const MCFixup &Fixup);
public:
- void addLocalUsedInReloc(const MCSymbol &Sym);
- bool isLocalUsedInReloc(const MCSymbol &Sym) const;
-
/// Compute the effective fragment size assuming it is laid out at the given
/// \p SectionAddress and \p FragmentOffset.
uint64_t computeFragmentSize(const MCAsmLayout &Layout,
public:
/// Construct a new assembler instance.
- ///
- /// \param OS The stream to output to.
//
// FIXME: How are we going to parameterize this? Two obvious options are stay
// concrete and require clients to pass in a target like object. The other
// option is to make this abstract, and have targets provide concrete
// implementations as we do with AsmParser.
MCAssembler(MCContext &Context_, MCAsmBackend &Backend_,
- MCCodeEmitter &Emitter_, MCObjectWriter &Writer_,
- raw_ostream &OS);
+ MCCodeEmitter &Emitter_, MCObjectWriter &Writer_);
~MCAssembler();
/// Reuse an assembler instance
MCObjectWriter &getWriter() const { return Writer; }
+ MCDwarfLineTableParams getDWARFLinetableParams() const { return LTParams; }
+ void setDWARFLinetableParams(MCDwarfLineTableParams P) { LTParams = P; }
+
/// Finish - Do final processing and write the object to the output stream.
/// \p Writer is used for custom object writer (as the MCJIT does),
/// if not specified it is automatically created from backend.
void Finish();
+ // Layout all section and prepare them for emission.
+ void layout(MCAsmLayout &Layout);
+
// FIXME: This does not belong here.
bool getSubsectionsViaSymbols() const { return SubsectionsViaSymbols; }
void setSubsectionsViaSymbols(bool Value) { SubsectionsViaSymbols = Value; }
+ bool isIncrementalLinkerCompatible() const {
+ return IncrementalLinkerCompatible;
+ }
+ void setIncrementalLinkerCompatible(bool Value) {
+ IncrementalLinkerCompatible = Value;
+ }
+
bool getRelaxAll() const { return RelaxAll; }
void setRelaxAll(bool Value) { RelaxAll = Value; }
/// \name Backend Data Access
/// @{
- bool registerSection(MCSection &Section) { return Sections.insert(&Section); }
-
- bool hasSymbolData(const MCSymbol &Symbol) const { return Symbol.hasData(); }
+ bool registerSection(MCSection &Section);
- void registerSymbol(const MCSymbol &Symbol, bool *Created = nullptr) {
- if (Created)
- *Created = !hasSymbolData(Symbol);
- if (!hasSymbolData(Symbol)) {
- Symbol.initializeData();
- Symbols.push_back(&Symbol);
- }
- }
+ void registerSymbol(const MCSymbol &Symbol, bool *Created = nullptr);
ArrayRef<std::string> getFileNames() { return FileNames; }
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