#ifndef LLVM_MC_MCASSEMBLER_H
#define LLVM_MC_MCASSEMBLER_H
+#include "llvm/MC/MCFixup.h"
+#include "llvm/MC/MCInst.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/Support/Casting.h"
-#include "llvm/MC/MCFixup.h"
-#include "llvm/System/DataTypes.h"
+#include "llvm/Support/DataTypes.h"
#include <vector> // FIXME: Shouldn't be needed.
namespace llvm {
class raw_ostream;
+class MCAsmLayout;
class MCAssembler;
class MCContext;
+class MCCodeEmitter;
class MCExpr;
class MCFragment;
+class MCObjectWriter;
class MCSection;
class MCSectionData;
class MCSymbol;
-
-/// MCAsmFixup - Represent a fixed size region of bytes inside some fragment
-/// which needs to be rewritten. This region will either be rewritten by the
-/// assembler or cause a relocation entry to be generated.
-struct MCAsmFixup {
- /// Offset - The offset inside the fragment which needs to be rewritten.
- uint64_t Offset;
-
- /// Value - The expression to eventually write into the fragment.
- const MCExpr *Value;
-
- /// Kind - The fixup kind.
- MCFixupKind Kind;
-
- /// FixedValue - The value to replace the fix up by.
- //
- // FIXME: This should not be here.
- uint64_t FixedValue;
-
-public:
- MCAsmFixup(uint64_t _Offset, const MCExpr &_Value, MCFixupKind _Kind)
- : Offset(_Offset), Value(&_Value), Kind(_Kind), FixedValue(0) {}
-};
+class MCSymbolData;
+class MCValue;
+class MCAsmBackend;
class MCFragment : public ilist_node<MCFragment> {
- MCFragment(const MCFragment&); // DO NOT IMPLEMENT
- void operator=(const MCFragment&); // DO NOT IMPLEMENT
+ friend class MCAsmLayout;
+
+ MCFragment(const MCFragment&) LLVM_DELETED_FUNCTION;
+ void operator=(const MCFragment&) LLVM_DELETED_FUNCTION;
public:
enum FragmentType {
- FT_Data,
FT_Align,
+ FT_Data,
FT_Fill,
+ FT_Inst,
FT_Org,
- FT_ZeroFill
+ FT_Dwarf,
+ FT_DwarfFrame,
+ FT_LEB
};
private:
/// 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
/// @{
//
/// initialized.
uint64_t Offset;
- /// FileSize - The file size of this section. This is ~0 until initialized.
- uint64_t FileSize;
+ /// LayoutOrder - The layout order of this fragment.
+ unsigned LayoutOrder;
/// @}
MCSectionData *getParent() const { return Parent; }
void setParent(MCSectionData *Value) { Parent = Value; }
- // FIXME: This should be abstract, fix sentinel.
- virtual uint64_t getMaxFileSize() const {
- assert(0 && "Invalid getMaxFileSize call!");
- return 0;
- }
+ MCSymbolData *getAtom() const { return Atom; }
+ void setAtom(MCSymbolData *Value) { Atom = Value; }
+
+ unsigned getLayoutOrder() const { return LayoutOrder; }
+ void setLayoutOrder(unsigned Value) { LayoutOrder = Value; }
+
+ void dump();
+};
+
+class MCDataFragment : public MCFragment {
+ virtual void anchor();
+ SmallString<32> Contents;
+
+ /// Fixups - The list of fixups in this fragment.
+ std::vector<MCFixup> Fixups;
- /// @name Assembler Backend Support
+public:
+ typedef std::vector<MCFixup>::const_iterator const_fixup_iterator;
+ typedef std::vector<MCFixup>::iterator fixup_iterator;
+
+public:
+ MCDataFragment(MCSectionData *SD = 0) : MCFragment(FT_Data, SD) {}
+
+ /// @name Accessors
/// @{
- //
- // FIXME: This could all be kept private to the assembler implementation.
- uint64_t getAddress() const;
+ SmallString<32> &getContents() { return Contents; }
+ const SmallString<32> &getContents() const { return Contents; }
- uint64_t getFileSize() const {
- assert(FileSize != ~UINT64_C(0) && "File size not set!");
- return FileSize;
- }
- void setFileSize(uint64_t Value) {
- assert(Value <= getMaxFileSize() && "Invalid file size!");
- FileSize = Value;
- }
+ /// @}
+ /// @name Fixup Access
+ /// @{
- uint64_t getOffset() const {
- assert(Offset != ~UINT64_C(0) && "File offset not set!");
- return Offset;
+ void addFixup(MCFixup Fixup) {
+ // Enforce invariant that fixups are in offset order.
+ assert((Fixups.empty() || Fixup.getOffset() >= Fixups.back().getOffset()) &&
+ "Fixups must be added in order!");
+ Fixups.push_back(Fixup);
}
- void setOffset(uint64_t Value) { Offset = Value; }
- /// @}
+ std::vector<MCFixup> &getFixups() { return Fixups; }
+ const std::vector<MCFixup> &getFixups() const { return Fixups; }
- static bool classof(const MCFragment *O) { 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();}
+
+ size_t fixup_size() const { return Fixups.size(); }
- virtual void dump();
+ /// @}
+
+ static bool classof(const MCFragment *F) {
+ return F->getKind() == MCFragment::FT_Data;
+ }
};
-class MCDataFragment : public MCFragment {
- SmallString<32> Contents;
+// FIXME: This current incarnation of MCInstFragment doesn't make much sense, as
+// it is almost entirely a duplicate of MCDataFragment. If we decide to stick
+// with this approach (as opposed to making MCInstFragment a very light weight
+// object with just the MCInst and a code size, then we should just change
+// MCDataFragment to have an optional MCInst at its end.
+class MCInstFragment : public MCFragment {
+ virtual void anchor();
+
+ /// Inst - The instruction this is a fragment for.
+ MCInst Inst;
+
+ /// Code - Binary data for the currently encoded instruction.
+ SmallString<8> Code;
/// Fixups - The list of fixups in this fragment.
- std::vector<MCAsmFixup> Fixups;
+ SmallVector<MCFixup, 1> Fixups;
public:
- typedef std::vector<MCAsmFixup>::const_iterator const_fixup_iterator;
- typedef std::vector<MCAsmFixup>::iterator fixup_iterator;
+ typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator;
+ typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
public:
- MCDataFragment(MCSectionData *SD = 0) : MCFragment(FT_Data, SD) {}
+ MCInstFragment(const MCInst &_Inst, MCSectionData *SD = 0)
+ : MCFragment(FT_Inst, SD), Inst(_Inst) {
+ }
/// @name Accessors
/// @{
- uint64_t getMaxFileSize() const {
- return Contents.size();
- }
+ SmallVectorImpl<char> &getCode() { return Code; }
+ const SmallVectorImpl<char> &getCode() const { return Code; }
- SmallString<32> &getContents() { return Contents; }
- const SmallString<32> &getContents() const { return Contents; }
+ unsigned getInstSize() const { return Code.size(); }
- /// @}
+ MCInst &getInst() { return Inst; }
+ const MCInst &getInst() const { return Inst; }
+
+ void setInst(const MCInst& Value) { Inst = Value; }
+ /// @}
/// @name Fixup Access
/// @{
- std::vector<MCAsmFixup> &getFixups() { return Fixups; }
- const std::vector<MCAsmFixup> &getFixups() const { return Fixups; }
+ SmallVectorImpl<MCFixup> &getFixups() { return Fixups; }
+ const SmallVectorImpl<MCFixup> &getFixups() const { return Fixups; }
fixup_iterator fixup_begin() { return Fixups.begin(); }
const_fixup_iterator fixup_begin() const { return Fixups.begin(); }
/// @}
static bool classof(const MCFragment *F) {
- return F->getKind() == MCFragment::FT_Data;
+ return F->getKind() == MCFragment::FT_Inst;
}
- static bool classof(const MCDataFragment *) { return true; }
-
- virtual void dump();
};
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 \arg 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 - true when aligning code and optimal nops to be used for filling
- bool EmitNops;
+ /// 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, bool _EmitNops,
- MCSectionData *SD = 0)
+ unsigned _MaxBytesToEmit, MCSectionData *SD = 0)
: MCFragment(FT_Align, SD), Alignment(_Alignment),
Value(_Value),ValueSize(_ValueSize),
- MaxBytesToEmit(_MaxBytesToEmit), EmitNops(_EmitNops) {}
+ MaxBytesToEmit(_MaxBytesToEmit), EmitNops(false) {}
/// @name Accessors
/// @{
- uint64_t getMaxFileSize() const {
- return std::max(Alignment - 1, MaxBytesToEmit);
- }
-
unsigned getAlignment() const { return Alignment; }
int64_t getValue() const { return Value; }
unsigned getMaxBytesToEmit() const { return MaxBytesToEmit; }
- unsigned getEmitNops() const { return EmitNops; }
+ bool hasEmitNops() const { return EmitNops; }
+ void setEmitNops(bool Value) { EmitNops = Value; }
/// @}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Align;
}
- static bool classof(const MCAlignFragment *) { return true; }
-
- virtual void dump();
};
class MCFillFragment : public MCFragment {
+ virtual void anchor();
+
/// Value - Value to use for filling bytes.
int64_t Value;
- /// ValueSize - The size (in bytes) of \arg Value to use when filling.
+ /// ValueSize - The size (in bytes) of \p Value to use when filling, or 0 if
+ /// this is a virtual fill fragment.
unsigned ValueSize;
- /// Count - The number of copies of \arg Value to insert.
- uint64_t Count;
+ /// Size - The number of bytes to insert.
+ uint64_t Size;
public:
- MCFillFragment(int64_t _Value, unsigned _ValueSize, uint64_t _Count,
+ MCFillFragment(int64_t _Value, unsigned _ValueSize, uint64_t _Size,
MCSectionData *SD = 0)
: MCFragment(FT_Fill, SD),
- Value(_Value), ValueSize(_ValueSize), Count(_Count) {}
+ Value(_Value), ValueSize(_ValueSize), Size(_Size) {
+ assert((!ValueSize || (Size % ValueSize) == 0) &&
+ "Fill size must be a multiple of the value size!");
+ }
/// @name Accessors
/// @{
- uint64_t getMaxFileSize() const {
- return ValueSize * Count;
- }
-
int64_t getValue() const { return Value; }
unsigned getValueSize() const { return ValueSize; }
- uint64_t getCount() const { return Count; }
+ uint64_t getSize() const { return Size; }
/// @}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Fill;
}
- static bool classof(const MCFillFragment *) { return true; }
-
- virtual void dump();
};
class MCOrgFragment : public MCFragment {
+ virtual void anchor();
+
/// Offset - The offset this fragment should start at.
const MCExpr *Offset;
/// @name Accessors
/// @{
- uint64_t getMaxFileSize() const {
- // FIXME: This doesn't make much sense.
- return ~UINT64_C(0);
- }
-
const MCExpr &getOffset() const { return *Offset; }
uint8_t getValue() const { return Value; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Org;
}
- static bool classof(const MCOrgFragment *) { return true; }
-
- virtual void dump();
};
-/// MCZeroFillFragment - Represent data which has a fixed size and alignment,
-/// but requires no physical space in the object file.
-class MCZeroFillFragment : public MCFragment {
- /// Size - The size of this fragment.
- uint64_t Size;
+class MCLEBFragment : public MCFragment {
+ virtual void anchor();
- /// Alignment - The alignment for this fragment.
- unsigned Alignment;
+ /// 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:
- MCZeroFillFragment(uint64_t _Size, unsigned _Alignment, MCSectionData *SD = 0)
- : MCFragment(FT_ZeroFill, SD),
- Size(_Size), Alignment(_Alignment) {}
+ MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSectionData *SD)
+ : MCFragment(FT_LEB, SD),
+ Value(&Value_), IsSigned(IsSigned_) { Contents.push_back(0); }
/// @name Accessors
/// @{
- uint64_t getMaxFileSize() const {
- // FIXME: This also doesn't make much sense, this method is misnamed.
- return ~UINT64_C(0);
+ 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;
}
+};
- uint64_t getSize() const { return Size; }
+class MCDwarfLineAddrFragment : public MCFragment {
+ virtual void anchor();
- unsigned getAlignment() const { return Alignment; }
+ /// 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_ZeroFill;
+ return F->getKind() == MCFragment::FT_Dwarf;
}
- static bool classof(const MCZeroFillFragment *) { return true; }
+};
+
+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); }
- virtual void dump();
+ /// @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> {
- MCSectionData(const MCSectionData&); // DO NOT IMPLEMENT
- void operator=(const MCSectionData&); // DO NOT IMPLEMENT
+ friend class MCAsmLayout;
+
+ MCSectionData(const MCSectionData&) LLVM_DELETED_FUNCTION;
+ void operator=(const MCSectionData&) LLVM_DELETED_FUNCTION;
public:
typedef iplist<MCFragment> FragmentListType;
typedef FragmentListType::reverse_iterator reverse_iterator;
private:
- iplist<MCFragment> Fragments;
+ 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;
//
// FIXME: This could all be kept private to the assembler implementation.
- /// Address - The computed address of this section. This is ~0 until
- /// initialized.
- uint64_t Address;
-
- /// Size - The content size of this section. This is ~0 until initialized.
- uint64_t Size;
-
- /// FileSize - The size of this section in the object file. This is ~0 until
- /// initialized.
- uint64_t FileSize;
-
/// HasInstructions - Whether this section has had instructions emitted into
/// it.
unsigned HasInstructions : 1;
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
/// @{
bool empty() const { return Fragments.empty(); }
- /// @}
- /// @name Assembler Backend Support
- /// @{
- //
- // FIXME: This could all be kept private to the assembler implementation.
-
- uint64_t getAddress() const {
- assert(Address != ~UINT64_C(0) && "Address not set!");
- return Address;
- }
- void setAddress(uint64_t Value) { Address = Value; }
-
- uint64_t getSize() const {
- assert(Size != ~UINT64_C(0) && "File size not set!");
- return Size;
- }
- void setSize(uint64_t Value) { Size = Value; }
-
- uint64_t getFileSize() const {
- assert(FileSize != ~UINT64_C(0) && "File size not set!");
- return FileSize;
- }
- void setFileSize(uint64_t Value) { FileSize = Value; }
-
- bool hasInstructions() const { return HasInstructions; }
- void setHasInstructions(bool Value) { HasInstructions = Value; }
+ void dump();
/// @}
-
- void dump();
};
// FIXME: Same concerns as with SectionData.
// 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?
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!");
/// 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; }
MCSectionData *SectionData;
};
+// FIXME: Ditto this. Purely so the Streamer and the ObjectWriter can talk
+// to one another.
+struct DataRegionData {
+ // This enum should be kept in sync w/ the mach-o definition in
+ // llvm/Object/MachOFormat.h.
+ enum KindTy { Data = 1, JumpTable8, JumpTable16, JumpTable32 } Kind;
+ MCSymbol *Start;
+ MCSymbol *End;
+};
+
class MCAssembler {
+ friend class MCAsmLayout;
+
public:
typedef iplist<MCSectionData> SectionDataListType;
typedef iplist<MCSymbolData> SymbolDataListType;
typedef SymbolDataListType::const_iterator const_symbol_iterator;
typedef SymbolDataListType::iterator symbol_iterator;
+ typedef std::vector<IndirectSymbolData>::const_iterator
+ const_indirect_symbol_iterator;
typedef std::vector<IndirectSymbolData>::iterator indirect_symbol_iterator;
+ typedef std::vector<DataRegionData>::const_iterator
+ const_data_region_iterator;
+ typedef std::vector<DataRegionData>::iterator data_region_iterator;
+
private:
- MCAssembler(const MCAssembler&); // DO NOT IMPLEMENT
- void operator=(const MCAssembler&); // DO NOT IMPLEMENT
+ MCAssembler(const MCAssembler&) LLVM_DELETED_FUNCTION;
+ void operator=(const MCAssembler&) LLVM_DELETED_FUNCTION;
MCContext &Context;
+ MCAsmBackend &Backend;
+
+ MCCodeEmitter &Emitter;
+
+ MCObjectWriter &Writer;
+
raw_ostream &OS;
iplist<MCSectionData> 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;
+
std::vector<IndirectSymbolData> IndirectSymbols;
+ std::vector<DataRegionData> DataRegions;
+ /// The set of function symbols for which a .thumb_func directive has
+ /// been seen.
+ //
+ // FIXME: We really would like this in target specific code rather than
+ // 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;
+
+ unsigned RelaxAll : 1;
+ unsigned NoExecStack : 1;
unsigned SubsectionsViaSymbols : 1;
private:
- /// LayoutSection - Assign offsets and sizes to the fragments in the section
- /// \arg SD, and update the section size. The section file offset should
- /// already have been computed.
- void LayoutSection(MCSectionData &SD);
+ /// Evaluate a fixup to a relocatable expression and the value which should be
+ /// placed into the fixup.
+ ///
+ /// \param Layout The layout to use for evaluation.
+ /// \param Fixup The fixup to evaluate.
+ /// \param DF The fragment the fixup is inside.
+ /// \param Target [out] On return, the relocatable expression the fixup
+ /// evaluates to.
+ /// \param Value [out] On return, the value of the fixup as currently laid
+ /// out.
+ /// \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;
+
+ /// Check whether a fixup can be satisfied, or whether it needs to be relaxed
+ /// (increased in size, in order to hold its value correctly).
+ bool fixupNeedsRelaxation(const MCFixup &Fixup, const MCInstFragment *DF,
+ const MCAsmLayout &Layout) const;
+
+ /// Check whether the given fragment needs relaxation.
+ bool fragmentNeedsRelaxation(const MCInstFragment *IF,
+ const MCAsmLayout &Layout) const;
+
+ /// layoutOnce - Perform one layout iteration and return true if any offsets
+ /// were adjusted.
+ bool layoutOnce(MCAsmLayout &Layout);
+
+ bool layoutSectionOnce(MCAsmLayout &Layout, MCSectionData &SD);
+
+ bool relaxInstruction(MCAsmLayout &Layout, MCInstFragment &IF);
+
+ bool relaxLEB(MCAsmLayout &Layout, MCLEBFragment &IF);
+
+ bool relaxDwarfLineAddr(MCAsmLayout &Layout, MCDwarfLineAddrFragment &DF);
+ bool relaxDwarfCallFrameFragment(MCAsmLayout &Layout,
+ MCDwarfCallFrameFragment &DF);
+
+ /// finishLayout - Finalize a layout, including fragment lowering.
+ void finishLayout(MCAsmLayout &Layout);
+
+ uint64_t handleFixup(const MCAsmLayout &Layout,
+ MCFragment &F, const MCFixup &Fixup);
+
+public:
+ /// Compute the effective fragment size assuming it is laid out at the given
+ /// \p SectionAddress and \p FragmentOffset.
+ uint64_t computeFragmentSize(const MCAsmLayout &Layout,
+ const MCFragment &F) const;
+
+ /// 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;
+
+ /// 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
+ /// also effects whether the assembler treats the label as potentially
+ /// defining a separate atom.
+ bool isSymbolLinkerVisible(const MCSymbol &SD) const;
+
+ /// Emit the section contents using the given object writer.
+ void writeSectionData(const MCSectionData *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);
+ }
+
+ /// Flag a function symbol as the target of a .thumb_func directive.
+ void setIsThumbFunc(const MCSymbol *Func) { ThumbFuncs.insert(Func); }
public:
/// Construct a new assembler instance.
///
- /// \arg OS - The stream to output to.
+ /// \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, raw_ostream &OS);
+ MCAssembler(MCContext &Context_, MCAsmBackend &Backend_,
+ MCCodeEmitter &Emitter_, MCObjectWriter &Writer_,
+ raw_ostream &OS);
~MCAssembler();
MCContext &getContext() const { return Context; }
+ MCAsmBackend &getBackend() const { return Backend; }
+
+ MCCodeEmitter &getEmitter() const { return Emitter; }
+
+ MCObjectWriter &getWriter() const { return Writer; }
+
/// 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.
SubsectionsViaSymbols = Value;
}
+ bool getRelaxAll() const { return RelaxAll; }
+ void setRelaxAll(bool Value) { RelaxAll = Value; }
+
+ bool getNoExecStack() const { return NoExecStack; }
+ void setNoExecStack(bool Value) { NoExecStack = Value; }
+
/// @name Section List Access
/// @{
indirect_symbol_iterator indirect_symbol_begin() {
return IndirectSymbols.begin();
}
+ const_indirect_symbol_iterator indirect_symbol_begin() const {
+ return IndirectSymbols.begin();
+ }
indirect_symbol_iterator indirect_symbol_end() {
return IndirectSymbols.end();
}
+ const_indirect_symbol_iterator indirect_symbol_end() const {
+ return IndirectSymbols.end();
+ }
size_t indirect_symbol_size() const { return IndirectSymbols.size(); }
+ /// @}
+ /// @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;
+ }
+
+ 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();
+ }
+ const_data_region_iterator data_region_end() const {
+ return DataRegions.end();
+ }
+
+ size_t data_region_size() const { return DataRegions.size(); }
+
+ /// @}
+ /// @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 = 0) {
+ MCSectionData *&Entry = SectionMap[&Section];
+
+ if (Created) *Created = !Entry;
+ if (!Entry)
+ Entry = new MCSectionData(Section, this);
+
+ return *Entry;
+ }
+
+ 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 = 0) {
+ MCSymbolData *&Entry = SymbolMap[&Symbol];
+
+ if (Created) *Created = !Entry;
+ if (!Entry)
+ Entry = new MCSymbolData(Symbol, 0, 0, this);
+
+ return *Entry;
+ }
+
/// @}
void dump();
projects / oota-llvm.git / blobdiff