#define LLVM_MC_MCASSEMBLER_H
#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/DenseSet.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/Support/Casting.h"
#include "llvm/Support/DataTypes.h"
class MCFragment;
class MCObjectWriter;
class MCSection;
-class MCSectionData;
class MCSubtargetInfo;
-class MCSymbol;
-class MCSymbolData;
class MCValue;
class MCAsmBackend;
class MCFragment : public ilist_node<MCFragment> {
friend class MCAsmLayout;
- MCFragment(const MCFragment&) LLVM_DELETED_FUNCTION;
- void operator=(const MCFragment&) LLVM_DELETED_FUNCTION;
+ 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
};
private:
FragmentType Kind;
- /// Parent - The data for the section this fragment is in.
- MCSectionData *Parent;
+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;
/// Atom - The atom this fragment is in, as represented by it's defining
/// symbol.
- MCSymbolData *Atom;
+ const MCSymbol *Atom;
- /// @name Assembler Backend Data
+ /// \name Assembler Backend Data
/// @{
//
// FIXME: This could all be kept private to the assembler implementation.
/// initialized.
uint64_t Offset;
- /// LayoutOrder - The layout order of this fragment.
- unsigned LayoutOrder;
-
/// @}
protected:
- MCFragment(FragmentType _Kind, MCSectionData *_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; }
- void setParent(MCSectionData *Value) { Parent = Value; }
+ MCSection *getParent() const { return Parent; }
+ void setParent(MCSection *Value) { Parent = Value; }
- MCSymbolData *getAtom() const { return Atom; }
- void setAtom(MCSymbolData *Value) { Atom = 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; }
+ 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; }
void dump();
};
/// data.
///
class MCEncodedFragment : public MCFragment {
- virtual void anchor();
+protected:
+ MCEncodedFragment(MCFragment::FragmentType FType, bool HasInstructions,
+ MCSection *Sec)
+ : MCFragment(FType, HasInstructions, 0, Sec) {}
- uint8_t BundlePadding;
public:
- MCEncodedFragment(MCFragment::FragmentType FType, MCSectionData *SD = nullptr)
- : MCFragment(FType, SD), BundlePadding(0)
- {
- }
- virtual ~MCEncodedFragment();
-
- 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;
+ 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.
+/// 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,
- MCSectionData *SD = nullptr)
- : MCEncodedFragment(FType, SD)
- {
- }
+ 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> {
- virtual ~MCEncodedFragmentWithFixups();
+ /// Fixups - The list of fixups in this fragment.
+ SmallVector<MCFixup, FixupsSize> Fixups;
+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(MCSectionData *SD = nullptr)
- : MCEncodedFragmentWithFixups(FT_Data, SD),
- 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; }
+ MCDataFragment(MCSection *Sec = nullptr)
+ : MCEncodedFragmentWithFixups<32, 4>(FT_Data, false, Sec) {}
- 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();}
+ 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(MCSectionData *SD = nullptr)
- : MCEncodedFragment(FT_CompactEncodedInst, SD), AlignToBundleEnd(false)
- {
- }
-
- bool hasInstructions() const override {
- return true;
+ MCCompactEncodedInstFragment(MCSection *Sec = nullptr)
+ : MCEncodedFragmentWithContents(FT_CompactEncodedInst, true, Sec) {
}
- 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;
/// 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,
- MCSectionData *SD = nullptr)
- : MCEncodedFragmentWithFixups(FT_Relaxable, SD), Inst(_Inst), STI(_STI) {
- }
-
- SmallVectorImpl<char> &getContents() override { return Contents; }
- const SmallVectorImpl<char> &getContents() const override { return Contents; }
+ MCRelaxableFragment(const MCInst &Inst, const MCSubtargetInfo &STI,
+ MCSection *Sec = nullptr)
+ : MCEncodedFragmentWithFixups(FT_Relaxable, true, Sec),
+ Inst(Inst), STI(STI) {}
const MCInst &getInst() const { return Inst; }
- void setInst(const MCInst& Value) { Inst = Value; }
+ 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, MCSectionData *SD = nullptr)
- : MCFragment(FT_Align, SD), Alignment(_Alignment),
- Value(_Value),ValueSize(_ValueSize),
- MaxBytesToEmit(_MaxBytesToEmit), EmitNops(false) {}
+ MCAlignFragment(unsigned Alignment, int64_t Value, unsigned ValueSize,
+ unsigned MaxBytesToEmit, MCSection *Sec = nullptr)
+ : MCFragment(FT_Align, false, 0, Sec), Alignment(Alignment),
+ EmitNops(false), Value(Value),
+ ValueSize(ValueSize), MaxBytesToEmit(MaxBytesToEmit) {}
- /// @name Accessors
+ /// \name Accessors
/// @{
unsigned getAlignment() const { return Alignment; }
};
class MCFillFragment : public MCFragment {
- virtual void anchor();
/// Value - Value to use for filling bytes.
int64_t Value;
uint64_t Size;
public:
- MCFillFragment(int64_t _Value, unsigned _ValueSize, uint64_t _Size,
- MCSectionData *SD = nullptr)
- : MCFragment(FT_Fill, SD),
- Value(_Value), ValueSize(_ValueSize), Size(_Size) {
+ MCFillFragment(int64_t Value, unsigned ValueSize, uint64_t Size,
+ MCSection *Sec = nullptr)
+ : 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!");
}
- /// @name Accessors
+ /// \name Accessors
/// @{
int64_t getValue() const { return Value; }
};
class MCOrgFragment : public MCFragment {
- virtual void anchor();
/// Offset - The offset this fragment should start at.
const MCExpr *Offset;
int8_t Value;
public:
- MCOrgFragment(const MCExpr &_Offset, int8_t _Value,
- MCSectionData *SD = nullptr)
- : MCFragment(FT_Org, SD),
- Offset(&_Offset), Value(_Value) {}
+ MCOrgFragment(const MCExpr &Offset, int8_t Value, MCSection *Sec = nullptr)
+ : MCFragment(FT_Org, false, 0, Sec), Offset(&Offset), Value(Value) {}
- /// @name Accessors
+ /// \name Accessors
/// @{
const MCExpr &getOffset() const { return *Offset; }
};
class MCLEBFragment : public MCFragment {
- virtual void anchor();
/// Value - The value this fragment should contain.
const MCExpr *Value;
bool IsSigned;
SmallString<8> Contents;
+
public:
- MCLEBFragment(const MCExpr &Value_, bool IsSigned_,
- MCSectionData *SD = nullptr)
- : MCFragment(FT_LEB, SD),
- Value(&Value_), IsSigned(IsSigned_) { Contents.push_back(0); }
+ MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSection *Sec = nullptr)
+ : MCFragment(FT_LEB, false, 0, Sec), Value(&Value_), IsSigned(IsSigned_) {
+ Contents.push_back(0);
+ }
- /// @name Accessors
+ /// \name Accessors
/// @{
const MCExpr &getValue() const { return *Value; }
};
class MCDwarfLineAddrFragment : public MCFragment {
- virtual void anchor();
/// LineDelta - the value of the difference between the two line numbers
/// between two .loc dwarf directives.
SmallString<8> Contents;
public:
- MCDwarfLineAddrFragment(int64_t _LineDelta, const MCExpr &_AddrDelta,
- MCSectionData *SD = nullptr)
- : MCFragment(FT_Dwarf, SD),
- LineDelta(_LineDelta), AddrDelta(&_AddrDelta) { Contents.push_back(0); }
+ MCDwarfLineAddrFragment(int64_t LineDelta, const MCExpr &AddrDelta,
+ MCSection *Sec = nullptr)
+ : MCFragment(FT_Dwarf, false, 0, Sec), LineDelta(LineDelta),
+ AddrDelta(&AddrDelta) {
+ Contents.push_back(0);
+ }
- /// @name Accessors
+ /// \name Accessors
/// @{
int64_t getLineDelta() const { return LineDelta; }
};
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.
SmallString<8> Contents;
public:
- MCDwarfCallFrameFragment(const MCExpr &_AddrDelta,
- MCSectionData *SD = nullptr)
- : MCFragment(FT_DwarfFrame, SD),
- AddrDelta(&_AddrDelta) { Contents.push_back(0); }
+ MCDwarfCallFrameFragment(const MCExpr &AddrDelta, MCSection *Sec = nullptr)
+ : MCFragment(FT_DwarfFrame, false, 0, Sec), AddrDelta(&AddrDelta) {
+ Contents.push_back(0);
+ }
- /// @name Accessors
+ /// \name Accessors
/// @{
const MCExpr &getAddrDelta() const { return *AddrDelta; }
}
};
-// FIXME: Should this be a separate class, or just merged into MCSection? Since
-// we anticipate the fast path being through an MCAssembler, the only reason to
-// keep it out is for API abstraction.
-class MCSectionData : public ilist_node<MCSectionData> {
- friend class MCAsmLayout;
-
- MCSectionData(const MCSectionData&) LLVM_DELETED_FUNCTION;
- void operator=(const MCSectionData&) LLVM_DELETED_FUNCTION;
-
-public:
- typedef iplist<MCFragment> FragmentListType;
-
- typedef FragmentListType::const_iterator const_iterator;
- typedef FragmentListType::iterator iterator;
-
- typedef FragmentListType::const_reverse_iterator const_reverse_iterator;
- typedef FragmentListType::reverse_iterator reverse_iterator;
-
- /// \brief Express the state of bundle locked groups while emitting code.
- enum BundleLockStateType {
- NotBundleLocked,
- BundleLocked,
- BundleLockedAlignToEnd
- };
-private:
- FragmentListType Fragments;
- const MCSection *Section;
-
- /// Ordinal - The section index in the assemblers section list.
- unsigned Ordinal;
-
- /// LayoutOrder - The index of this section in the layout order.
- unsigned LayoutOrder;
-
- /// Alignment - The maximum alignment seen in this section.
- unsigned Alignment;
-
- /// \brief Keeping track of bundle-locked state.
- BundleLockStateType BundleLockState;
-
- /// \brief We've seen a bundle_lock directive but not its first instruction
- /// yet.
- bool BundleGroupBeforeFirstInst;
-
- /// @name Assembler Backend Data
- /// @{
- //
- // FIXME: This could all be kept private to the assembler implementation.
-
- /// HasInstructions - Whether this section has had instructions emitted into
- /// it.
- unsigned HasInstructions : 1;
-
- /// Mapping from subsection number to insertion point for subsection numbers
- /// below that number.
- SmallVector<std::pair<unsigned, MCFragment *>, 1> SubsectionFragmentMap;
-
- /// @}
-
-public:
- // Only for use as sentinel.
- MCSectionData();
- MCSectionData(const MCSection &Section, MCAssembler *A = nullptr);
-
- const MCSection &getSection() const { return *Section; }
-
- unsigned getAlignment() const { return Alignment; }
- void setAlignment(unsigned Value) { Alignment = Value; }
-
- bool hasInstructions() const { return HasInstructions; }
- void setHasInstructions(bool Value) { HasInstructions = Value; }
-
- unsigned getOrdinal() const { return Ordinal; }
- void setOrdinal(unsigned Value) { Ordinal = Value; }
-
- unsigned getLayoutOrder() const { return LayoutOrder; }
- void setLayoutOrder(unsigned Value) { LayoutOrder = Value; }
-
- /// @name Fragment Access
- /// @{
-
- const FragmentListType &getFragmentList() const { return Fragments; }
- FragmentListType &getFragmentList() { return Fragments; }
-
- iterator begin() { return Fragments.begin(); }
- const_iterator begin() const { return Fragments.begin(); }
-
- iterator end() { return Fragments.end(); }
- const_iterator end() const { return Fragments.end(); }
-
- reverse_iterator rbegin() { return Fragments.rbegin(); }
- const_reverse_iterator rbegin() const { return Fragments.rbegin(); }
-
- reverse_iterator rend() { return Fragments.rend(); }
- const_reverse_iterator rend() const { return Fragments.rend(); }
-
- size_t size() const { return Fragments.size(); }
-
- bool empty() const { return Fragments.empty(); }
-
- iterator getSubsectionInsertionPoint(unsigned Subsection);
-
- bool isBundleLocked() const {
- return BundleLockState != NotBundleLocked;
- }
-
- BundleLockStateType getBundleLockState() const {
- return BundleLockState;
- }
-
- void setBundleLockState(BundleLockStateType NewState) {
- BundleLockState = NewState;
- }
-
- bool isBundleGroupBeforeFirstInst() const {
- return BundleGroupBeforeFirstInst;
- }
-
- void setBundleGroupBeforeFirstInst(bool IsFirst) {
- BundleGroupBeforeFirstInst = IsFirst;
- }
-
- void dump();
-
- /// @}
-};
-
-// FIXME: Same concerns as with SectionData.
-class MCSymbolData : public ilist_node<MCSymbolData> {
-public:
- const MCSymbol *Symbol;
-
- /// Fragment - The fragment this symbol's value is relative to, if any.
- MCFragment *Fragment;
-
- /// Offset - The offset to apply to the fragment address to form this symbol's
- /// value.
- uint64_t Offset;
-
- /// IsExternal - True if this symbol is visible outside this translation
- /// unit.
- unsigned IsExternal : 1;
-
- /// IsPrivateExtern - True if this symbol is private extern.
- unsigned IsPrivateExtern : 1;
-
- /// CommonSize - The size of the symbol, if it is 'common', or 0.
- //
- // FIXME: Pack this in with other fields? We could put it in offset, since a
- // common symbol can never get a definition.
- uint64_t CommonSize;
-
- /// SymbolSize - An expression describing how to calculate the size of
- /// a symbol. If a symbol has no size this field will be NULL.
- const MCExpr *SymbolSize;
-
- /// CommonAlign - The alignment of the symbol, if it is 'common'.
- //
- // FIXME: Pack this in with other fields?
- unsigned CommonAlign;
-
- /// Flags - The Flags field is used by object file implementations to store
- /// additional per symbol information which is not easily classified.
- uint32_t Flags;
-
- /// Index - Index field, for use by the object file implementation.
- uint64_t Index;
+class MCSafeSEHFragment : public MCFragment {
+ const MCSymbol *Sym;
public:
- // Only for use as sentinel.
- MCSymbolData();
- MCSymbolData(const MCSymbol &_Symbol, MCFragment *_Fragment, uint64_t _Offset,
- MCAssembler *A = nullptr);
+ MCSafeSEHFragment(const MCSymbol *Sym, MCSection *Sec = nullptr)
+ : MCFragment(FT_SafeSEH, false, 0, Sec), Sym(Sym) {}
- /// @name Accessors
+ /// \name Accessors
/// @{
- const MCSymbol &getSymbol() const { return *Symbol; }
-
- MCFragment *getFragment() const { return Fragment; }
- void setFragment(MCFragment *Value) { Fragment = Value; }
-
- uint64_t getOffset() const { return Offset; }
- void setOffset(uint64_t Value) { Offset = Value; }
+ const MCSymbol *getSymbol() { return Sym; }
+ const MCSymbol *getSymbol() const { return Sym; }
/// @}
- /// @name Symbol Attributes
- /// @{
-
- bool isExternal() const { return IsExternal; }
- void setExternal(bool Value) { IsExternal = Value; }
-
- bool isPrivateExtern() const { return IsPrivateExtern; }
- void setPrivateExtern(bool Value) { IsPrivateExtern = Value; }
-
- /// isCommon - Is this a 'common' symbol.
- bool isCommon() const { return CommonSize != 0; }
-
- /// setCommon - Mark this symbol as being 'common'.
- ///
- /// \param Size - The size of the symbol.
- /// \param Align - The alignment of the symbol.
- void setCommon(uint64_t Size, unsigned Align) {
- CommonSize = Size;
- CommonAlign = Align;
- }
- /// getCommonSize - Return the size of a 'common' symbol.
- uint64_t getCommonSize() const {
- assert(isCommon() && "Not a 'common' symbol!");
- return CommonSize;
- }
-
- void setSize(const MCExpr *SS) {
- SymbolSize = SS;
- }
-
- const MCExpr *getSize() const {
- return SymbolSize;
- }
-
-
- /// getCommonAlignment - Return the alignment of a 'common' symbol.
- unsigned getCommonAlignment() const {
- assert(isCommon() && "Not a 'common' symbol!");
- return CommonAlign;
- }
-
- /// getFlags - Get the (implementation defined) symbol flags.
- uint32_t getFlags() const { return Flags; }
-
- /// setFlags - Set the (implementation defined) symbol flags.
- void setFlags(uint32_t Value) { Flags = Value; }
-
- /// modifyFlags - Modify the flags via a mask
- void modifyFlags(uint32_t Value, uint32_t Mask) {
- Flags = (Flags & ~Mask) | Value;
+ static bool classof(const MCFragment *F) {
+ return F->getKind() == MCFragment::FT_SafeSEH;
}
-
- /// getIndex - Get the (implementation defined) index.
- uint64_t getIndex() const { return Index; }
-
- /// setIndex - Set the (implementation defined) index.
- void setIndex(uint64_t Value) { Index = Value; }
-
- /// @}
-
- void dump();
};
// 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 iplist<MCSectionData> SectionDataListType;
- typedef iplist<MCSymbolData> SymbolDataListType;
+ typedef std::vector<MCSection *> SectionListType;
+ typedef std::vector<const MCSymbol *> SymbolDataListType;
- typedef SectionDataListType::const_iterator const_iterator;
- typedef SectionDataListType::iterator iterator;
+ typedef pointee_iterator<SectionListType::const_iterator> const_iterator;
+ typedef pointee_iterator<SectionListType::iterator> iterator;
- typedef SymbolDataListType::const_iterator const_symbol_iterator;
- typedef SymbolDataListType::iterator symbol_iterator;
+ typedef pointee_iterator<SymbolDataListType::const_iterator>
+ const_symbol_iterator;
+ typedef pointee_iterator<SymbolDataListType::iterator> symbol_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;
+ const_indirect_symbol_iterator;
typedef std::vector<IndirectSymbolData>::iterator indirect_symbol_iterator;
typedef std::vector<DataRegionData>::const_iterator
- const_data_region_iterator;
+ const_data_region_iterator;
typedef std::vector<DataRegionData>::iterator data_region_iterator;
/// MachO specific deployment target version info.
unsigned Minor;
unsigned Update;
} VersionMinInfoType;
+
private:
- MCAssembler(const MCAssembler&) LLVM_DELETED_FUNCTION;
- void operator=(const MCAssembler&) LLVM_DELETED_FUNCTION;
+ MCAssembler(const MCAssembler &) = delete;
+ void operator=(const MCAssembler &) = delete;
MCContext &Context;
raw_ostream &OS;
- iplist<MCSectionData> Sections;
+ SectionListType Sections;
- iplist<MCSymbolData> Symbols;
-
- /// The map of sections to their associated assembler backend data.
- //
- // FIXME: Avoid this indirection?
- DenseMap<const MCSection*, MCSectionData*> SectionMap;
-
- /// The map of symbols to their associated assembler backend data.
- //
- // FIXME: Avoid this indirection?
- DenseMap<const MCSymbol*, MCSymbolData*> SymbolMap;
+ SymbolDataListType Symbols;
std::vector<IndirectSymbolData> IndirectSymbols;
std::vector<DataRegionData> DataRegions;
/// The list of linker options to propagate into the object file.
- std::vector<std::vector<std::string> > LinkerOptions;
+ 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.
// here. Maybe when the relocation stuff moves to target specific,
// this can go with it? The streamer would need some target specific
// refactoring too.
- SmallPtrSet<const MCSymbol*, 64> ThumbFuncs;
+ mutable SmallPtrSet<const MCSymbol *, 64> ThumbFuncs;
/// \brief The bundle alignment size currently set in the assembler.
///
unsigned BundleAlignSize;
unsigned RelaxAll : 1;
- unsigned NoExecStack : 1;
unsigned SubsectionsViaSymbols : 1;
/// ELF specific e_header flags
MCLOHContainer LOHContainer;
VersionMinInfoType VersionMinInfo;
+
private:
/// Evaluate a fixup to a relocatable expression and the value which should be
/// placed into the fixup.
/// \return Whether the fixup value was fully resolved. This is true if the
/// \p Value result is fixed, otherwise the value may change due to
/// relocation.
- bool evaluateFixup(const MCAsmLayout &Layout,
- const MCFixup &Fixup, const MCFragment *DF,
- MCValue &Target, uint64_t &Value) const;
+ bool evaluateFixup(const MCAsmLayout &Layout, const MCFixup &Fixup,
+ const MCFragment *DF, MCValue &Target,
+ uint64_t &Value) const;
/// Check whether a fixup can be satisfied, or whether it needs to be relaxed
/// (increased in size, in order to hold its value correctly).
/// \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);
/// Find the symbol which defines the atom containing the given symbol, or
/// null if there is no such symbol.
- const MCSymbolData *getAtom(const MCSymbolData *Symbol) const;
+ const MCSymbol *getAtom(const MCSymbol &S) const;
/// Check whether a particular symbol is visible to the linker and is required
/// in the symbol table, or whether it can be discarded by the assembler. This
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.
- bool isThumbFunc(const MCSymbol *Func) const {
- return ThumbFuncs.count(Func);
- }
+ bool isThumbFunc(const MCSymbol *Func) const;
/// Flag a function symbol as the target of a .thumb_func directive.
void setIsThumbFunc(const MCSymbol *Func) { ThumbFuncs.insert(Func); }
/// ELF e_header flags
- unsigned getELFHeaderEFlags() const {return ELFHeaderEFlags;}
- void setELFHeaderEFlags(unsigned Flags) { ELFHeaderEFlags = Flags;}
+ unsigned getELFHeaderEFlags() const { return ELFHeaderEFlags; }
+ void setELFHeaderEFlags(unsigned Flags) { ELFHeaderEFlags = Flags; }
/// MachO deployment target version information.
const VersionMinInfoType &getVersionMinInfo() const { return VersionMinInfo; }
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();
// FIXME: This does not belong here.
- bool getSubsectionsViaSymbols() const {
- return SubsectionsViaSymbols;
- }
- void setSubsectionsViaSymbols(bool Value) {
- SubsectionsViaSymbols = Value;
- }
+ bool getSubsectionsViaSymbols() const { return SubsectionsViaSymbols; }
+ void setSubsectionsViaSymbols(bool Value) { SubsectionsViaSymbols = Value; }
bool getRelaxAll() const { return RelaxAll; }
void setRelaxAll(bool Value) { RelaxAll = Value; }
- bool getNoExecStack() const { return NoExecStack; }
- void setNoExecStack(bool Value) { NoExecStack = Value; }
-
- bool isBundlingEnabled() const {
- return BundleAlignSize != 0;
- }
+ bool isBundlingEnabled() const { return BundleAlignSize != 0; }
- unsigned getBundleAlignSize() const {
- return BundleAlignSize;
- }
+ unsigned getBundleAlignSize() const { return BundleAlignSize; }
void setBundleAlignSize(unsigned Size) {
- assert((Size == 0 || !(Size & (Size - 1))) &&
+ assert((Size == 0 || !(Size & (Size - 1))) &&
"Expect a power-of-two bundle align size");
BundleAlignSize = Size;
}
- /// @name Section List Access
+ /// \name Section List Access
/// @{
- const SectionDataListType &getSectionList() const { return Sections; }
- SectionDataListType &getSectionList() { return Sections; }
-
iterator begin() { return Sections.begin(); }
const_iterator begin() const { return Sections.begin(); }
size_t size() const { return Sections.size(); }
/// @}
- /// @name Symbol List Access
+ /// \name Symbol List Access
/// @{
-
- const SymbolDataListType &getSymbolList() const { return Symbols; }
- SymbolDataListType &getSymbolList() { return Symbols; }
-
symbol_iterator symbol_begin() { return Symbols.begin(); }
const_symbol_iterator symbol_begin() const { return Symbols.begin(); }
const_symbol_iterator symbol_end() const { return Symbols.end(); }
symbol_range symbols() { return make_range(symbol_begin(), symbol_end()); }
- const_symbol_range symbols() const { return make_range(symbol_begin(), symbol_end()); }
+ const_symbol_range symbols() const {
+ return make_range(symbol_begin(), symbol_end());
+ }
size_t symbol_size() const { return Symbols.size(); }
/// @}
- /// @name Indirect Symbol List Access
+ /// \name Indirect Symbol List Access
/// @{
// FIXME: This is a total hack, this should not be here. Once things are
size_t indirect_symbol_size() const { return IndirectSymbols.size(); }
/// @}
- /// @name Linker Option List Access
+ /// \name Linker Option List Access
/// @{
- std::vector<std::vector<std::string> > &getLinkerOptions() {
+ std::vector<std::vector<std::string>> &getLinkerOptions() {
return LinkerOptions;
}
/// @}
- /// @name Data Region List Access
+ /// \name Data Region List Access
/// @{
// FIXME: This is a total hack, this should not be here. Once things are
// factored so that the streamer has direct access to the .o writer, it can
// disappear.
- std::vector<DataRegionData> &getDataRegions() {
- return DataRegions;
- }
+ std::vector<DataRegionData> &getDataRegions() { return DataRegions; }
- data_region_iterator data_region_begin() {
- return DataRegions.begin();
- }
+ data_region_iterator data_region_begin() { return DataRegions.begin(); }
const_data_region_iterator data_region_begin() const {
return DataRegions.begin();
}
- data_region_iterator data_region_end() {
- return DataRegions.end();
- }
+ data_region_iterator data_region_end() { return DataRegions.end(); }
const_data_region_iterator data_region_end() const {
return DataRegions.end();
}
size_t data_region_size() const { return DataRegions.size(); }
/// @}
- /// @name Data Region List Access
+ /// \name Data Region List Access
/// @{
// FIXME: This is a total hack, this should not be here. Once things are
// factored so that the streamer has direct access to the .o writer, it can
// disappear.
- MCLOHContainer & getLOHContainer() {
- return LOHContainer;
- }
- const MCLOHContainer & getLOHContainer() const {
+ MCLOHContainer &getLOHContainer() { return LOHContainer; }
+ const MCLOHContainer &getLOHContainer() const {
return const_cast<MCAssembler *>(this)->getLOHContainer();
}
/// @}
- /// @name Backend Data Access
+ /// \name Backend Data Access
/// @{
- MCSectionData &getSectionData(const MCSection &Section) const {
- MCSectionData *Entry = SectionMap.lookup(&Section);
- assert(Entry && "Missing section data!");
- return *Entry;
- }
-
- MCSectionData &getOrCreateSectionData(const MCSection &Section,
- bool *Created = nullptr) {
- MCSectionData *&Entry = SectionMap[&Section];
-
- if (Created) *Created = !Entry;
- if (!Entry)
- Entry = new MCSectionData(Section, this);
-
- return *Entry;
- }
-
- bool hasSymbolData(const MCSymbol &Symbol) const {
- return SymbolMap.lookup(&Symbol) != nullptr;
- }
-
- MCSymbolData &getSymbolData(const MCSymbol &Symbol) {
- MCSymbolData *Entry = SymbolMap.lookup(&Symbol);
- assert(Entry && "Missing symbol data!");
- return *Entry;
- }
-
- const MCSymbolData &getSymbolData(const MCSymbol &Symbol) const {
- MCSymbolData *Entry = SymbolMap.lookup(&Symbol);
- assert(Entry && "Missing symbol data!");
- return *Entry;
- }
-
- MCSymbolData &getOrCreateSymbolData(const MCSymbol &Symbol,
- bool *Created = nullptr) {
- MCSymbolData *&Entry = SymbolMap[&Symbol];
-
- if (Created) *Created = !Entry;
- if (!Entry)
- Entry = new MCSymbolData(Symbol, nullptr, 0, this);
-
- return *Entry;
+ bool registerSection(MCSection &Section) {
+ if (Section.isRegistered())
+ return false;
+ Sections.push_back(&Section);
+ Section.setIsRegistered(true);
+ return true;
}
- 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);
}
+ /// \brief Write the necessary bundle padding to the given object writer.
+ /// Expects a fragment \p F containing instructions and its size \p FSize.
+ void writeFragmentPadding(const MCFragment &F, uint64_t FSize,
+ MCObjectWriter *OW) const;
+
/// @}
void dump();
};
+/// \brief Compute the amount of padding required before the fragment \p F to
+/// obey bundling restrictions, where \p FOffset is the fragment's offset in
+/// its section and \p FSize is the fragment's size.
+uint64_t computeBundlePadding(const MCAssembler &Assembler, const MCFragment *F,
+ uint64_t FOffset, uint64_t FSize);
+
} // end namespace llvm
#endif
projects / oota-llvm.git / blobdiff