#ifndef LLVM_MC_MCASSEMBLER_H
#define LLVM_MC_MCASSEMBLER_H
#include "llvm/ADT/DenseMap.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 <vector> // FIXME: Shouldn't be needed.
namespace llvm {
class raw_ostream;
class MCAsmLayout;
class MCAssembler;
class MCContext;
class MCExpr;
class MCFragment;
class MCSection;
class MCSectionData;
class MCSymbol;
class MCValue;
class TargetAsmBackend;
struct MCAsmFixup {
uint64_t Offset;
const MCExpr *Value;
MCFixupKind Kind;
uint64_t FixedValue;
public:
MCAsmFixup(uint64_t _Offset, const MCExpr &_Value, MCFixupKind _Kind)
: Offset(_Offset), Value(&_Value), Kind(_Kind), FixedValue(0) {}
};
class MCFragment : public ilist_node<MCFragment> {
MCFragment(const MCFragment&); void operator=(const MCFragment&);
public:
enum FragmentType {
FT_Data,
FT_Align,
FT_Fill,
FT_Org,
FT_ZeroFill
};
private:
FragmentType Kind;
MCSectionData *Parent;
uint64_t Offset;
uint64_t FileSize;
protected:
MCFragment(FragmentType _Kind, MCSectionData *_Parent = 0);
public:
MCFragment();
virtual ~MCFragment();
FragmentType getKind() const { return Kind; }
MCSectionData *getParent() const { return Parent; }
void setParent(MCSectionData *Value) { Parent = Value; }
virtual uint64_t getMaxFileSize() const {
assert(0 && "Invalid getMaxFileSize call!");
return 0;
}
uint64_t getAddress() const;
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;
}
uint64_t getOffset() const {
assert(Offset != ~UINT64_C(0) && "File offset not set!");
return Offset;
}
void setOffset(uint64_t Value) { Offset = Value; }
static bool classof(const MCFragment *O) { return true; }
virtual void dump();
};
class MCDataFragment : public MCFragment {
SmallString<32> Contents;
std::vector<MCAsmFixup> Fixups;
public:
typedef std::vector<MCAsmFixup>::const_iterator const_fixup_iterator;
typedef std::vector<MCAsmFixup>::iterator fixup_iterator;
public:
MCDataFragment(MCSectionData *SD = 0) : MCFragment(FT_Data, SD) {}
uint64_t getMaxFileSize() const {
return Contents.size();
}
SmallString<32> &getContents() { return Contents; }
const SmallString<32> &getContents() const { return Contents; }
void addFixup(MCAsmFixup Fixup) {
assert((Fixups.empty() || Fixup.Offset > Fixups.back().Offset) &&
"Fixups must be added in order!");
Fixups.push_back(Fixup);
}
std::vector<MCAsmFixup> &getFixups() { return Fixups; }
const std::vector<MCAsmFixup> &getFixups() const { return Fixups; }
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(); }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Data;
}
static bool classof(const MCDataFragment *) { return true; }
virtual void dump();
};
class MCAlignFragment : public MCFragment {
unsigned Alignment;
int64_t Value;
unsigned ValueSize;
unsigned MaxBytesToEmit;
bool EmitNops;
public:
MCAlignFragment(unsigned _Alignment, int64_t _Value, unsigned _ValueSize,
unsigned _MaxBytesToEmit, bool _EmitNops,
MCSectionData *SD = 0)
: MCFragment(FT_Align, SD), Alignment(_Alignment),
Value(_Value),ValueSize(_ValueSize),
MaxBytesToEmit(_MaxBytesToEmit), EmitNops(_EmitNops) {}
uint64_t getMaxFileSize() const {
return std::max(Alignment - 1, MaxBytesToEmit);
}
unsigned getAlignment() const { return Alignment; }
int64_t getValue() const { return Value; }
unsigned getValueSize() const { return ValueSize; }
unsigned getMaxBytesToEmit() const { return MaxBytesToEmit; }
unsigned getEmitNops() const { return EmitNops; }
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 {
int64_t Value;
unsigned ValueSize;
uint64_t Count;
public:
MCFillFragment(int64_t _Value, unsigned _ValueSize, uint64_t _Count,
MCSectionData *SD = 0)
: MCFragment(FT_Fill, SD),
Value(_Value), ValueSize(_ValueSize), Count(_Count) {}
uint64_t getMaxFileSize() const {
return ValueSize * Count;
}
int64_t getValue() const { return Value; }
unsigned getValueSize() const { return ValueSize; }
uint64_t getCount() const { return Count; }
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 {
const MCExpr *Offset;
int8_t Value;
public:
MCOrgFragment(const MCExpr &_Offset, int8_t _Value, MCSectionData *SD = 0)
: MCFragment(FT_Org, SD),
Offset(&_Offset), Value(_Value) {}
uint64_t getMaxFileSize() const {
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();
};
class MCZeroFillFragment : public MCFragment {
uint64_t Size;
unsigned Alignment;
public:
MCZeroFillFragment(uint64_t _Size, unsigned _Alignment, MCSectionData *SD = 0)
: MCFragment(FT_ZeroFill, SD),
Size(_Size), Alignment(_Alignment) {}
uint64_t getMaxFileSize() const {
return ~UINT64_C(0);
}
uint64_t getSize() const { return Size; }
unsigned getAlignment() const { return Alignment; }
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_ZeroFill;
}
static bool classof(const MCZeroFillFragment *) { return true; }
virtual void dump();
};
class MCSectionData : public ilist_node<MCSectionData> {
MCSectionData(const MCSectionData&); void operator=(const MCSectionData&);
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;
private:
iplist<MCFragment> Fragments;
const MCSection *Section;
unsigned Alignment;
uint64_t Address;
uint64_t Size;
uint64_t FileSize;
unsigned HasInstructions : 1;
public:
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; }
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(); }
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();
};
class MCSymbolData : public ilist_node<MCSymbolData> {
public:
const MCSymbol *Symbol;
MCFragment *Fragment;
uint64_t Offset;
unsigned IsExternal : 1;
unsigned IsPrivateExtern : 1;
uint64_t CommonSize;
unsigned CommonAlign;
uint32_t Flags;
uint64_t Index;
public:
MCSymbolData();
MCSymbolData(const MCSymbol &_Symbol, MCFragment *_Fragment, uint64_t _Offset,
MCAssembler *A = 0);
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; }
uint64_t getAddress() const {
assert(getFragment() && "Invalid getAddress() on undefined symbol!");
return getFragment()->getAddress() + getOffset();
}
bool isExternal() const { return IsExternal; }
void setExternal(bool Value) { IsExternal = Value; }
bool isPrivateExtern() const { return IsPrivateExtern; }
void setPrivateExtern(bool Value) { IsPrivateExtern = Value; }
bool isCommon() const { return CommonSize != 0; }
void setCommon(uint64_t Size, unsigned Align) {
CommonSize = Size;
CommonAlign = Align;
}
uint64_t getCommonSize() const {
assert(isCommon() && "Not a 'common' symbol!");
return CommonSize;
}
unsigned getCommonAlignment() const {
assert(isCommon() && "Not a 'common' symbol!");
return CommonAlign;
}
uint32_t getFlags() const { return Flags; }
void setFlags(uint32_t Value) { Flags = Value; }
uint64_t getIndex() const { return Index; }
void setIndex(uint64_t Value) { Index = Value; }
void dump();
};
struct IndirectSymbolData {
MCSymbol *Symbol;
MCSectionData *SectionData;
};
class MCAssembler {
public:
typedef iplist<MCSectionData> SectionDataListType;
typedef iplist<MCSymbolData> SymbolDataListType;
typedef SectionDataListType::const_iterator const_iterator;
typedef SectionDataListType::iterator iterator;
typedef SymbolDataListType::const_iterator const_symbol_iterator;
typedef SymbolDataListType::iterator symbol_iterator;
typedef std::vector<IndirectSymbolData>::iterator indirect_symbol_iterator;
private:
MCAssembler(const MCAssembler&); void operator=(const MCAssembler&);
MCContext &Context;
TargetAsmBackend &Backend;
raw_ostream &OS;
iplist<MCSectionData> Sections;
iplist<MCSymbolData> Symbols;
DenseMap<const MCSection*, MCSectionData*> SectionMap;
DenseMap<const MCSymbol*, MCSymbolData*> SymbolMap;
std::vector<IndirectSymbolData> IndirectSymbols;
unsigned SubsectionsViaSymbols : 1;
private:
bool FixupNeedsRelaxation(MCAsmFixup &Fixup, MCDataFragment *DF);
void LayoutSection(MCSectionData &SD);
bool LayoutOnce();
public:
bool EvaluateFixup(const MCAsmLayout &Layout,
MCAsmFixup &Fixup, MCDataFragment *DF,
MCValue &Target, uint64_t &Value) const;
public:
MCAssembler(MCContext &_Context, TargetAsmBackend &_Backend, raw_ostream &OS);
~MCAssembler();
MCContext &getContext() const { return Context; }
TargetAsmBackend &getBackend() const { return Backend; }
void Finish();
bool getSubsectionsViaSymbols() const {
return SubsectionsViaSymbols;
}
void setSubsectionsViaSymbols(bool Value) {
SubsectionsViaSymbols = Value;
}
const SectionDataListType &getSectionList() const { return Sections; }
SectionDataListType &getSectionList() { return Sections; }
iterator begin() { return Sections.begin(); }
const_iterator begin() const { return Sections.begin(); }
iterator end() { return Sections.end(); }
const_iterator end() const { return Sections.end(); }
size_t size() const { return Sections.size(); }
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(); }
size_t symbol_size() const { return Symbols.size(); }
std::vector<IndirectSymbolData> &getIndirectSymbols() {
return IndirectSymbols;
}
indirect_symbol_iterator indirect_symbol_begin() {
return IndirectSymbols.begin();
}
indirect_symbol_iterator indirect_symbol_end() {
return IndirectSymbols.end();
}
size_t indirect_symbol_size() const { return IndirectSymbols.size(); }
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();
};
}
#endif