#ifndef LLVM_MC_MCASSEMBLER_H
#define LLVM_MC_MCASSEMBLER_H
-#include "llvm/ADT/DenseMap.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/Support/Casting.h"
-#include "llvm/Support/DataTypes.h"
-#include <vector> // FIXME: Shouldn't be needed.
+#include "llvm/MC/MCLinkerOptimizationHint.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCSymbol.h"
namespace llvm {
class raw_ostream;
class MCFragment;
class MCObjectWriter;
class MCSection;
-class MCSectionData;
-class MCSymbol;
-class MCSymbolData;
+class MCSubtargetInfo;
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;
-
-public:
- enum FragmentType {
- FT_Align,
- FT_Data,
- FT_CompactEncodedInst,
- FT_Fill,
- FT_Relaxable,
- FT_Org,
- FT_Dwarf,
- FT_DwarfFrame,
- FT_LEB
- };
-
-private:
- FragmentType Kind;
-
- /// Parent - The data for the section this fragment is in.
- MCSectionData *Parent;
-
- /// Atom - The atom this fragment is in, as represented by it's defining
- /// symbol. Atom's are only used by backends which set
- /// \see MCAsmBackend::hasReliableSymbolDifference().
- MCSymbolData *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, MCSectionData *_Parent = 0);
-
-public:
- // Only for sentinel.
- MCFragment();
- virtual ~MCFragment();
-
- FragmentType getKind() const { return Kind; }
-
- MCSectionData *getParent() const { return Parent; }
- void setParent(MCSectionData *Value) { Parent = Value; }
-
- MCSymbolData *getAtom() const { return Atom; }
- void setAtom(MCSymbolData *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) {
- }
-
- virtual bool hasFixups() const {
- return false;
- }
-
- 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, MCSectionData *SD = 0)
- : MCFragment(FType, SD), BundlePadding(0)
- {
- }
- virtual ~MCEncodedFragment();
-
- virtual SmallVectorImpl<char> &getContents() = 0;
- virtual const SmallVectorImpl<char> &getContents() const = 0;
-
- virtual uint8_t getBundlePadding() const {
- return BundlePadding;
- }
-
- virtual void setBundlePadding(uint8_t N) {
- 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 {
- virtual void anchor();
-
-public:
- MCEncodedFragmentWithFixups(MCFragment::FragmentType FType,
- MCSectionData *SD = 0)
- : MCEncodedFragment(FType, SD)
- {
- }
-
- virtual ~MCEncodedFragmentWithFixups();
-
- virtual bool hasFixups() const {
- return true;
- }
-
- 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) {
- return isa<MCEncodedFragment>(F) && F->hasFixups();
- }
-};
-
-/// Fragment for data and encoded instructions.
-///
-class MCDataFragment : public MCEncodedFragmentWithFixups {
- virtual void anchor();
-
- /// \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(MCSectionData *SD = 0)
- : MCEncodedFragmentWithFixups(FT_Data, SD),
- HasInstructions(false), AlignToBundleEnd(false)
- {
- }
-
- virtual SmallVectorImpl<char> &getContents() { return Contents; }
- virtual const SmallVectorImpl<char> &getContents() const { return Contents; }
-
- SmallVectorImpl<MCFixup> &getFixups() {
- return Fixups;
- }
-
- const SmallVectorImpl<MCFixup> &getFixups() const {
- return Fixups;
- }
-
- virtual bool hasInstructions() const { return HasInstructions; }
- virtual void setHasInstructions(bool V) { HasInstructions = V; }
-
- virtual bool alignToBundleEnd() const { return AlignToBundleEnd; }
- virtual void setAlignToBundleEnd(bool V) { AlignToBundleEnd = V; }
-
- 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) {
- 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 {
- virtual void anchor();
-
- /// \brief Should this fragment be aligned to the end of a bundle?
- bool AlignToBundleEnd;
-
- SmallVector<char, 4> Contents;
-public:
- MCCompactEncodedInstFragment(MCSectionData *SD = 0)
- : MCEncodedFragment(FT_CompactEncodedInst, SD), AlignToBundleEnd(false)
- {
- }
-
- virtual bool hasInstructions() const {
- return true;
- }
-
- virtual SmallVectorImpl<char> &getContents() { return Contents; }
- virtual const SmallVectorImpl<char> &getContents() const { return Contents; }
-
- virtual bool alignToBundleEnd() const { return AlignToBundleEnd; }
- virtual void setAlignToBundleEnd(bool V) { 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 {
- virtual void anchor();
-
- /// Inst - The instruction this is a fragment for.
- MCInst Inst;
-
- /// 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, MCSectionData *SD = 0)
- : MCEncodedFragmentWithFixups(FT_Relaxable, SD), Inst(_Inst) {
- }
-
- virtual SmallVectorImpl<char> &getContents() { return Contents; }
- virtual const SmallVectorImpl<char> &getContents() const { return Contents; }
-
- const MCInst &getInst() const { return Inst; }
- void setInst(const MCInst& Value) { Inst = Value; }
-
- SmallVectorImpl<MCFixup> &getFixups() {
- return Fixups;
- }
-
- const SmallVectorImpl<MCFixup> &getFixups() const {
- return Fixups;
- }
-
- virtual bool hasInstructions() const { return true; }
-
- 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) {
- 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, MCSectionData *SD = 0)
- : MCFragment(FT_Align, SD), 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,
- MCSectionData *SD = 0)
- : MCFragment(FT_Fill, SD),
- 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, MCSectionData *SD = 0)
- : MCFragment(FT_Org, SD),
- 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_, MCSectionData *SD)
- : MCFragment(FT_LEB, SD),
- 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,
- MCSectionData *SD)
- : MCFragment(FT_Dwarf, SD),
- 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, MCSectionData *SD)
- : MCFragment(FT_DwarfFrame, SD),
- 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: 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;
-
- /// @}
-
-public:
- // Only for use as sentinel.
- MCSectionData();
- MCSectionData(const MCSection &Section, MCAssembler *A = 0);
-
- 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(); }
-
- 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;
-
-public:
- // Only for use as sentinel.
- MCSymbolData();
- MCSymbolData(const MCSymbol &_Symbol, MCFragment *_Fragment, uint64_t _Offset,
- MCAssembler *A = 0);
-
- /// @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; }
-
- /// @}
- /// @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;
- }
-
- /// 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 pointee_iterator<SectionListType::const_iterator> const_iterator;
+ typedef pointee_iterator<SectionListType::iterator> iterator;
- typedef SectionDataListType::const_iterator const_iterator;
- typedef SectionDataListType::iterator iterator;
+ typedef pointee_iterator<SymbolDataListType::const_iterator>
+ const_symbol_iterator;
+ typedef pointee_iterator<SymbolDataListType::iterator> symbol_iterator;
- typedef SymbolDataListType::const_iterator const_symbol_iterator;
- typedef SymbolDataListType::iterator symbol_iterator;
+ typedef iterator_range<symbol_iterator> symbol_range;
+ typedef iterator_range<const_symbol_iterator> const_symbol_range;
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.
+ // A Major version of 0 indicates that no version information was supplied
+ // and so the corresponding load command should not be emitted.
+ typedef struct {
+ MCVersionMinType Kind;
+ unsigned Major;
+ 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;
MCObjectWriter &Writer;
- raw_ostream &OS;
+ SectionListType Sections;
- iplist<MCSectionData> Sections;
+ SymbolDataListType Symbols;
- iplist<MCSymbolData> Symbols;
+ std::vector<IndirectSymbolData> IndirectSymbols;
- /// The map of sections to their associated assembler backend data.
- //
- // FIXME: Avoid this indirection?
- DenseMap<const MCSection*, MCSectionData*> SectionMap;
+ std::vector<DataRegionData> DataRegions;
- /// The map of symbols to their associated assembler backend data.
- //
- // FIXME: Avoid this indirection?
- DenseMap<const MCSymbol*, MCSymbolData*> SymbolMap;
+ /// The list of linker options to propagate into the object file.
+ std::vector<std::vector<std::string>> LinkerOptions;
- std::vector<IndirectSymbolData> IndirectSymbols;
+ /// List of declared file names
+ std::vector<std::string> FileNames;
+
+ MCDwarfLineTableParams LTParams;
- std::vector<DataRegionData> DataRegions;
/// 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;
+ unsigned IncrementalLinkerCompatible : 1;
+
+ /// ELF specific e_header flags
+ // It would be good if there were an MCELFAssembler class to hold this.
+ // ELF header flags are used both by the integrated and standalone assemblers.
+ // Access to the flags is necessary in cases where assembler directives affect
+ // which flags to be set.
+ unsigned ELFHeaderEFlags;
+
+ /// Used to communicate Linker Optimization Hint information between
+ /// the Streamer and the .o writer
+ MCLOHContainer LOHContainer;
+
+ VersionMinInfoType VersionMinInfo;
private:
/// Evaluate a fixup to a relocatable expression and the value which should be
/// \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);
/// finishLayout - Finalize a layout, including fragment lowering.
void finishLayout(MCAsmLayout &Layout);
- uint64_t handleFixup(const MCAsmLayout &Layout,
- MCFragment &F, const MCFixup &Fixup);
+ std::pair<uint64_t, bool> handleFixup(const MCAsmLayout &Layout,
+ MCFragment &F, const MCFixup &Fixup);
public:
/// Compute the effective fragment size assuming it is laid out at the given
/// 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; }
+
+ /// MachO deployment target version information.
+ const VersionMinInfoType &getVersionMinInfo() const { return VersionMinInfo; }
+ void setVersionMinInfo(MCVersionMinType Kind, unsigned Major, unsigned Minor,
+ unsigned Update) {
+ VersionMinInfo.Kind = Kind;
+ VersionMinInfo.Major = Major;
+ VersionMinInfo.Minor = Minor;
+ VersionMinInfo.Update = Update;
+ }
+
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;
+ bool getSubsectionsViaSymbols() const { return SubsectionsViaSymbols; }
+ void setSubsectionsViaSymbols(bool Value) { SubsectionsViaSymbols = Value; }
+
+ bool isIncrementalLinkerCompatible() const {
+ return IncrementalLinkerCompatible;
}
- void setSubsectionsViaSymbols(bool Value) {
- SubsectionsViaSymbols = Value;
+ void setIncrementalLinkerCompatible(bool Value) {
+ IncrementalLinkerCompatible = 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(); }
symbol_iterator symbol_end() { return Symbols.end(); }
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());
+ }
+
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 Data Region List Access
+ /// \name Linker Option List Access
+ /// @{
+
+ std::vector<std::vector<std::string>> &getLinkerOptions() {
+ return LinkerOptions;
+ }
+
+ /// @}
+ /// \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 Backend Data Access
+ /// \name Data Region List Access
/// @{
- MCSectionData &getSectionData(const MCSection &Section) const {
- MCSectionData *Entry = SectionMap.lookup(&Section);
- assert(Entry && "Missing section data!");
- return *Entry;
+ // 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 {
+ return const_cast<MCAssembler *>(this)->getLOHContainer();
}
+ /// @}
+ /// \name Backend Data Access
+ /// @{
- MCSectionData &getOrCreateSectionData(const MCSection &Section,
- bool *Created = 0) {
- MCSectionData *&Entry = SectionMap[&Section];
+ bool registerSection(MCSection &Section);
- if (Created) *Created = !Entry;
- if (!Entry)
- Entry = new MCSectionData(Section, this);
+ void registerSymbol(const MCSymbol &Symbol, bool *Created = nullptr);
- return *Entry;
- }
+ ArrayRef<std::string> getFileNames() { return FileNames; }
- MCSymbolData &getSymbolData(const MCSymbol &Symbol) const {
- MCSymbolData *Entry = SymbolMap.lookup(&Symbol);
- assert(Entry && "Missing symbol data!");
- return *Entry;
+ void addFileName(StringRef FileName) {
+ if (std::find(FileNames.begin(), FileNames.end(), FileName) ==
+ FileNames.end())
+ FileNames.push_back(FileName);
}
- MCSymbolData &getOrCreateSymbolData(const MCSymbol &Symbol,
- bool *Created = 0) {
- MCSymbolData *&Entry = SymbolMap[&Symbol];
-
- if (Created) *Created = !Entry;
- if (!Entry)
- Entry = new MCSymbolData(Symbol, 0, 0, this);
-
- return *Entry;
- }
+ /// \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