#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/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 MCFragment;
class MCObjectWriter;
class MCSection;
-class MCSectionData;
class MCSubtargetInfo;
class MCValue;
class MCAsmBackend;
-class MCFragment : public ilist_node<MCFragment> {
+class MCFragment : public ilist_node_with_parent<MCFragment, MCSection> {
friend class MCAsmLayout;
MCFragment(const MCFragment &) = delete;
void operator=(const MCFragment &) = delete;
public:
- enum FragmentType {
+ enum FragmentType : uint8_t {
FT_Align,
FT_Data,
FT_CompactEncodedInst,
FT_Org,
FT_Dwarf,
FT_DwarfFrame,
- FT_LEB
+ FT_LEB,
+ FT_SafeSEH,
+ FT_Dummy
};
private:
FragmentType Kind;
+protected:
+ bool HasInstructions;
+
+private:
+ /// \brief Should this fragment be aligned to the end of a bundle?
+ bool AlignToBundleEnd;
+
+ uint8_t BundlePadding;
+
+ /// LayoutOrder - The layout order of this fragment.
+ unsigned LayoutOrder;
+
/// The data for the section this fragment is in.
MCSection *Parent;
/// initialized.
uint64_t Offset;
- /// LayoutOrder - The layout order of this fragment.
- unsigned LayoutOrder;
-
/// @}
protected:
- MCFragment(FragmentType Kind, MCSection *Parent = nullptr);
+ MCFragment(FragmentType Kind, bool HasInstructions,
+ uint8_t BundlePadding, MCSection *Parent = nullptr);
-public:
- // Only for sentinel.
+ ~MCFragment();
+private:
+
+ // This is a friend so that the sentinal can be created.
+ friend struct ilist_sentinel_traits<MCFragment>;
MCFragment();
- virtual ~MCFragment();
+
+public:
+ /// Destroys the current fragment.
+ ///
+ /// This must be used instead of delete as MCFragment is non-virtual.
+ /// This method will dispatch to the appropriate subclass.
+ void destroy();
FragmentType getKind() const { return Kind; }
- MCSectionData *getParent() const {
- return &Parent->getSectionData();
- }
+ MCSection *getParent() const { return Parent; }
void setParent(MCSection *Value) { Parent = Value; }
const MCSymbol *getAtom() const { return Atom; }
/// \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; }
+ bool hasInstructions() const { return HasInstructions; }
/// \brief Should this fragment be placed at the end of an aligned bundle?
- virtual bool alignToBundleEnd() const { return false; }
- virtual void setAlignToBundleEnd(bool V) {}
+ bool alignToBundleEnd() const { return AlignToBundleEnd; }
+ void setAlignToBundleEnd(bool V) { AlignToBundleEnd = 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; }
+ uint8_t getBundlePadding() const { return BundlePadding; }
/// \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 setBundlePadding(uint8_t N) { BundlePadding = N; }
+
+ /// \brief Return true if given frgment has FT_Dummy type.
+ bool isDummy() const { return Kind == FT_Dummy; }
void dump();
};
+class MCDummyFragment : public MCFragment {
+public:
+ explicit MCDummyFragment(MCSection *Sec)
+ : MCFragment(FT_Dummy, false, 0, Sec){};
+ static bool classof(const MCFragment *F) { return F->getKind() == FT_Dummy; }
+};
+
/// Interface implemented by fragments that contain encoded instructions and/or
/// data.
///
class MCEncodedFragment : public MCFragment {
- virtual void anchor();
-
- uint8_t BundlePadding;
+protected:
+ MCEncodedFragment(MCFragment::FragmentType FType, bool HasInstructions,
+ MCSection *Sec)
+ : MCFragment(FType, HasInstructions, 0, Sec) {}
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) {
};
/// Interface implemented by fragments that contain encoded instructions and/or
-/// data and also have fixups registered.
+/// data.
///
-class MCEncodedFragmentWithFixups : public MCEncodedFragment {
- void anchor() override;
+template<unsigned ContentsSize>
+class MCEncodedFragmentWithContents : public MCEncodedFragment {
+ SmallVector<char, ContentsSize> Contents;
+
+protected:
+ MCEncodedFragmentWithContents(MCFragment::FragmentType FType,
+ bool HasInstructions,
+ MCSection *Sec)
+ : MCEncodedFragment(FType, HasInstructions, Sec) {}
public:
- MCEncodedFragmentWithFixups(MCFragment::FragmentType FType,
- MCSection *Sec = nullptr)
- : MCEncodedFragment(FType, Sec) {}
+ SmallVectorImpl<char> &getContents() { return Contents; }
+ const SmallVectorImpl<char> &getContents() const { return Contents; }
+};
+
+/// Interface implemented by fragments that contain encoded instructions and/or
+/// data and also have fixups registered.
+///
+template<unsigned ContentsSize, unsigned FixupsSize>
+class MCEncodedFragmentWithFixups :
+ public MCEncodedFragmentWithContents<ContentsSize> {
+
+ /// Fixups - The list of fixups in this fragment.
+ SmallVector<MCFixup, FixupsSize> Fixups;
- ~MCEncodedFragmentWithFixups() override;
+protected:
+ MCEncodedFragmentWithFixups(MCFragment::FragmentType FType,
+ bool HasInstructions,
+ MCSection *Sec)
+ : MCEncodedFragmentWithContents<ContentsSize>(FType, HasInstructions,
+ Sec) {}
+public:
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;
+ SmallVectorImpl<MCFixup> &getFixups() { return Fixups; }
+ const SmallVectorImpl<MCFixup> &getFixups() const { return Fixups; }
- 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;
+ fixup_iterator fixup_begin() { return Fixups.begin(); }
+ const_fixup_iterator fixup_begin() const { return Fixups.begin(); }
+
+ fixup_iterator fixup_end() { return Fixups.end(); }
+ const_fixup_iterator fixup_end() const { return Fixups.end(); }
static bool classof(const MCFragment *F) {
MCFragment::FragmentType Kind = F->getKind();
/// 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;
-
+class MCDataFragment : public MCEncodedFragmentWithFixups<32, 4> {
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; }
+ : MCEncodedFragmentWithFixups<32, 4>(FT_Data, false, Sec) {}
- 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(); }
+ void setHasInstructions(bool V) { HasInstructions = V; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Data;
/// 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;
-
+class MCCompactEncodedInstFragment : public MCEncodedFragmentWithContents<4> {
public:
MCCompactEncodedInstFragment(MCSection *Sec = nullptr)
- : MCEncodedFragment(FT_CompactEncodedInst, Sec), AlignToBundleEnd(false) {
+ : MCEncodedFragmentWithContents(FT_CompactEncodedInst, true, Sec) {
}
- 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;
+class MCRelaxableFragment : public MCEncodedFragmentWithFixups<8, 1> {
/// 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;
+ const MCSubtargetInfo &STI;
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; }
+ : MCEncodedFragmentWithFixups(FT_Relaxable, true, Sec),
+ Inst(Inst), STI(STI) {}
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;
+ /// 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;
+
/// Value - Value to use for filling padding bytes.
int64_t Value;
/// 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) {}
+ : MCFragment(FT_Align, false, 0, Sec), Alignment(Alignment),
+ EmitNops(false), Value(Value),
+ ValueSize(ValueSize), MaxBytesToEmit(MaxBytesToEmit) {}
/// \name Accessors
/// @{
};
class MCFillFragment : public MCFragment {
- virtual void anchor();
/// Value - Value to use for filling bytes.
int64_t Value;
public:
MCFillFragment(int64_t Value, unsigned ValueSize, uint64_t Size,
MCSection *Sec = nullptr)
- : MCFragment(FT_Fill, Sec), Value(Value), ValueSize(ValueSize),
+ : MCFragment(FT_Fill, false, 0, Sec), Value(Value), ValueSize(ValueSize),
Size(Size) {
assert((!ValueSize || (Size % ValueSize) == 0) &&
"Fill size must be a multiple of the value size!");
};
class MCOrgFragment : public MCFragment {
- virtual void anchor();
/// Offset - The offset this fragment should start at.
const MCExpr *Offset;
public:
MCOrgFragment(const MCExpr &Offset, int8_t Value, MCSection *Sec = nullptr)
- : MCFragment(FT_Org, Sec), Offset(&Offset), Value(Value) {}
+ : MCFragment(FT_Org, false, 0, Sec), Offset(&Offset), Value(Value) {}
/// \name Accessors
/// @{
};
class MCLEBFragment : public MCFragment {
- virtual void anchor();
/// Value - The value this fragment should contain.
const MCExpr *Value;
public:
MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSection *Sec = nullptr)
- : MCFragment(FT_LEB, Sec), Value(&Value_), IsSigned(IsSigned_) {
+ : MCFragment(FT_LEB, false, 0, Sec), Value(&Value_), IsSigned(IsSigned_) {
Contents.push_back(0);
}
};
class MCDwarfLineAddrFragment : public MCFragment {
- virtual void anchor();
/// LineDelta - the value of the difference between the two line numbers
/// between two .loc dwarf directives.
public:
MCDwarfLineAddrFragment(int64_t LineDelta, const MCExpr &AddrDelta,
MCSection *Sec = nullptr)
- : MCFragment(FT_Dwarf, Sec), LineDelta(LineDelta), AddrDelta(&AddrDelta) {
+ : MCFragment(FT_Dwarf, false, 0, Sec), LineDelta(LineDelta),
+ AddrDelta(&AddrDelta) {
Contents.push_back(0);
}
};
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.
public:
MCDwarfCallFrameFragment(const MCExpr &AddrDelta, MCSection *Sec = nullptr)
- : MCFragment(FT_DwarfFrame, Sec), AddrDelta(&AddrDelta) {
+ : MCFragment(FT_DwarfFrame, false, 0, Sec), AddrDelta(&AddrDelta) {
Contents.push_back(0);
}
}
};
+class MCSafeSEHFragment : public MCFragment {
+ const MCSymbol *Sym;
+
+public:
+ MCSafeSEHFragment(const MCSymbol *Sym, MCSection *Sec = nullptr)
+ : MCFragment(FT_SafeSEH, false, 0, Sec), Sym(Sym) {}
+
+ /// \name Accessors
+ /// @{
+
+ const MCSymbol *getSymbol() { return Sym; }
+ const MCSymbol *getSymbol() const { return Sym; }
+
+ /// @}
+
+ static bool classof(const MCFragment *F) {
+ return F->getKind() == MCFragment::FT_SafeSEH;
+ }
+};
+
// FIXME: This really doesn't belong here. See comments below.
struct IndirectSymbolData {
MCSymbol *Symbol;
- MCSectionData *SectionData;
+ MCSection *Section;
};
// FIXME: Ditto this. Purely so the Streamer and the ObjectWriter can talk
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;
typedef iterator_range<symbol_iterator> symbol_range;
typedef iterator_range<const_symbol_iterator> const_symbol_range;
- typedef std::vector<std::string> FileNameVectorType;
- typedef FileNameVectorType::const_iterator const_file_name_iterator;
-
typedef std::vector<IndirectSymbolData>::const_iterator
const_indirect_symbol_iterator;
typedef std::vector<IndirectSymbolData>::iterator indirect_symbol_iterator;
MCObjectWriter &Writer;
- raw_ostream &OS;
-
SectionListType Sections;
SymbolDataListType Symbols;
- DenseSet<const MCSymbol *> LocalsUsedInReloc;
-
std::vector<IndirectSymbolData> IndirectSymbols;
std::vector<DataRegionData> DataRegions;
std::vector<std::vector<std::string>> LinkerOptions;
/// List of declared file names
- FileNameVectorType FileNames;
+ std::vector<std::string> FileNames;
+
+ MCDwarfLineTableParams LTParams;
/// The set of function symbols for which a .thumb_func directive has
/// been seen.
/// \brief Perform one layout iteration of the given section and return true
/// if any offsets were adjusted.
- bool layoutSectionOnce(MCAsmLayout &Layout, MCSectionData &SD);
+ bool layoutSectionOnce(MCAsmLayout &Layout, MCSection &Sec);
bool relaxInstruction(MCAsmLayout &Layout, MCRelaxableFragment &IF);
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,
bool isSymbolLinkerVisible(const MCSymbol &SD) const;
/// Emit the section contents using the given object writer.
- void writeSectionData(const MCSectionData *Section,
+ void writeSectionData(const MCSection *Section,
const MCAsmLayout &Layout) const;
/// Check whether a given symbol has been flagged with .thumb_func.
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; }
/// \name Backend Data Access
/// @{
- MCSectionData &getSectionData(MCSection &Section) {
- assert(Sections.count(&Section) && "Unknown Seciton");
- return Section.getSectionData();
- }
-
- const MCSectionData &getSectionData(const MCSection &Section) const {
- return const_cast<MCAssembler *>(this)
- ->getSectionData(const_cast<MCSection &>(Section));
- }
-
- MCSectionData &getOrCreateSectionData(MCSection &Section,
- bool *Created = nullptr) {
- bool C = Sections.insert(&Section);
- if (Created)
- *Created = C;
- return Section.getSectionData();
- }
-
- bool hasSymbolData(const MCSymbol &Symbol) const { return Symbol.hasData(); }
+ bool registerSection(MCSection &Section);
- MCSymbolData &getSymbolData(const MCSymbol &Symbol) {
- return const_cast<MCSymbolData &>(
- static_cast<const MCAssembler &>(*this).getSymbolData(Symbol));
- }
-
- const MCSymbolData &getSymbolData(const MCSymbol &Symbol) const {
- return Symbol.getData();
- }
-
- MCSymbolData &getOrCreateSymbolData(const MCSymbol &Symbol,
- bool *Created = nullptr) {
- if (Created)
- *Created = !hasSymbolData(Symbol);
- if (!hasSymbolData(Symbol)) {
- Symbol.initializeData();
- Symbols.push_back(&Symbol);
- }
- return Symbol.getData();
- }
-
- const_file_name_iterator file_names_begin() const {
- return FileNames.begin();
- }
+ void registerSymbol(const MCSymbol &Symbol, bool *Created = nullptr);
- const_file_name_iterator file_names_end() const { return FileNames.end(); }
+ ArrayRef<std::string> getFileNames() { return FileNames; }
void addFileName(StringRef FileName) {
- if (std::find(file_names_begin(), file_names_end(), FileName) ==
- file_names_end())
+ if (std::find(FileNames.begin(), FileNames.end(), FileName) ==
+ FileNames.end())
FileNames.push_back(FileName);
}
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