#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/ilist.h"
#include "llvm/ADT/ilist_node.h"
-#include "llvm/MC/MCValue.h"
#include "llvm/Support/Casting.h"
-#include "llvm/Support/DataTypes.h"
+#include "llvm/System/DataTypes.h"
+#include <vector> // FIXME: Shouldn't be needed.
namespace llvm {
class raw_ostream;
class MCAssembler;
+class MCContext;
+class MCExpr;
class MCSection;
class MCSectionData;
+class MCSymbol;
class MCFragment : public ilist_node<MCFragment> {
MCFragment(const MCFragment&); // DO NOT IMPLEMENT
FT_Data,
FT_Align,
FT_Fill,
- FT_Org
+ FT_Org,
+ FT_ZeroFill
};
private:
FragmentType Kind;
+ /// Parent - The data for the section this fragment is in.
+ MCSectionData *Parent;
+
/// @name Assembler Backend Data
/// @{
//
// FIXME: This could all be kept private to the assembler implementation.
- /// FileOffset - The offset of this section in the object file. This is ~0
- /// until initialized.
- uint64_t FileOffset;
-
- /// FileSize - The size of this section in the object file. This is ~0 until
+ /// Offset - The offset of this fragment in its section. This is ~0 until
/// initialized.
+ uint64_t Offset;
+
+ /// FileSize - The file size of this section. This is ~0 until initialized.
uint64_t FileSize;
/// @}
protected:
- MCFragment(FragmentType _Kind, MCSectionData *SD = 0);
+ MCFragment(FragmentType _Kind, MCSectionData *_Parent = 0);
public:
// Only for sentinel.
FragmentType getKind() const { return Kind; }
+ MCSectionData *getParent() const { return Parent; }
+ void setParent(MCSectionData *Value) { Parent = Value; }
+
// FIXME: This should be abstract, fix sentinel.
- virtual unsigned getMaxFileSize() const {
- assert(0 && "Invalid getMaxFileSize call !");
+ virtual uint64_t getMaxFileSize() const {
+ assert(0 && "Invalid getMaxFileSize call!");
+ return 0;
};
/// @name Assembler Backend Support
//
// FIXME: This could all be kept private to the assembler implementation.
- unsigned getFileSize() const {
+ uint64_t getAddress() const;
+
+ uint64_t getFileSize() const {
assert(FileSize != ~UINT64_C(0) && "File size not set!");
return FileSize;
}
FileSize = Value;
}
- uint64_t getFileOffset() const {
- assert(FileOffset != ~UINT64_C(0) && "File offset not set!");
- return FileOffset;
+ uint64_t getOffset() const {
+ assert(Offset != ~UINT64_C(0) && "File offset not set!");
+ return Offset;
}
- void setFileOffset(uint64_t Value) { FileOffset = Value; }
+ void setOffset(uint64_t Value) { Offset = Value; }
/// @}
/// @name Accessors
/// @{
- unsigned getMaxFileSize() const {
+ uint64_t getMaxFileSize() const {
return Contents.size();
}
/// @name Accessors
/// @{
- unsigned getMaxFileSize() const {
+ uint64_t getMaxFileSize() const {
return std::max(Alignment - 1, MaxBytesToEmit);
}
class MCFillFragment : public MCFragment {
/// Value - Value to use for filling bytes.
- MCValue Value;
+ const MCExpr *Value;
/// ValueSize - The size (in bytes) of \arg Value to use when filling.
unsigned ValueSize;
uint64_t Count;
public:
- MCFillFragment(MCValue _Value, unsigned _ValueSize, uint64_t _Count,
+ MCFillFragment(const MCExpr &_Value, unsigned _ValueSize, uint64_t _Count,
MCSectionData *SD = 0)
: MCFragment(FT_Fill, SD),
- Value(_Value), ValueSize(_ValueSize), Count(_Count) {}
+ Value(&_Value), ValueSize(_ValueSize), Count(_Count) {}
/// @name Accessors
/// @{
- unsigned getMaxFileSize() const {
+ uint64_t getMaxFileSize() const {
return ValueSize * Count;
}
- MCValue getValue() const { return Value; }
+ const MCExpr &getValue() const { return *Value; }
unsigned getValueSize() const { return ValueSize; }
class MCOrgFragment : public MCFragment {
/// Offset - The offset this fragment should start at.
- MCValue Offset;
+ const MCExpr *Offset;
/// Value - Value to use for filling bytes.
- int64_t Value;
-
- /// ValueSize - The size (in bytes) of \arg Value to use when filling.
- unsigned ValueSize;
+ int8_t Value;
public:
- MCOrgFragment(MCValue _Offset, int64_t _Value, unsigned _ValueSize,
- MCSectionData *SD = 0)
+ MCOrgFragment(const MCExpr &_Offset, int8_t _Value, MCSectionData *SD = 0)
: MCFragment(FT_Org, SD),
- Offset(_Offset), Value(_Value), ValueSize(_ValueSize) {}
+ Offset(&_Offset), Value(_Value) {}
+
/// @name Accessors
/// @{
- unsigned getMaxFileSize() const {
- // FIXME
- return 0;
+ uint64_t getMaxFileSize() const {
+ // FIXME: This doesn't make much sense.
+ return ~UINT64_C(0);
}
- MCValue getOffset() const { return Offset; }
+ const MCExpr &getOffset() const { return *Offset; }
- int64_t getValue() const { return Value; }
-
- unsigned getValueSize() const { return ValueSize; }
+ uint8_t getValue() const { return Value; }
/// @}
static bool classof(const MCOrgFragment *) { return true; }
};
+/// 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;
+
+ /// Alignment - The alignment for this fragment.
+ unsigned Alignment;
+
+public:
+ MCZeroFillFragment(uint64_t _Size, unsigned _Alignment, MCSectionData *SD = 0)
+ : MCFragment(FT_ZeroFill, SD),
+ Size(_Size), Alignment(_Alignment) {}
+
+ /// @name Accessors
+ /// @{
+
+ uint64_t getMaxFileSize() const {
+ // FIXME: This also doesn't make much sense, this method is misnamed.
+ 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; }
+};
+
// 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.
void operator=(const MCSectionData&); // DO NOT IMPLEMENT
public:
+ /// Fixup - 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 Fixup {
+ /// Fragment - The fragment containing the fixup.
+ MCFragment *Fragment;
+
+ /// 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;
+
+ /// Size - The fixup size.
+ unsigned Size;
+
+ /// FixedValue - The value to replace the fix up by.
+ //
+ // FIXME: This should not be here.
+ uint64_t FixedValue;
+
+ public:
+ Fixup(MCFragment &_Fragment, uint64_t _Offset, const MCExpr &_Value,
+ unsigned _Size)
+ : Fragment(&_Fragment), Offset(_Offset), Value(&_Value), Size(_Size),
+ FixedValue(0) {}
+ };
+
typedef iplist<MCFragment> FragmentListType;
typedef FragmentListType::const_iterator const_iterator;
typedef FragmentListType::iterator iterator;
+ typedef std::vector<Fixup>::const_iterator const_fixup_iterator;
+ typedef std::vector<Fixup>::iterator fixup_iterator;
+
private:
iplist<MCFragment> Fragments;
- const MCSection &Section;
+ const MCSection *Section;
/// Alignment - The maximum alignment seen in this section.
unsigned Alignment;
//
// FIXME: This could all be kept private to the assembler implementation.
- /// FileOffset - The offset of this section in the object file. This is ~0
- /// until initialized.
- uint64_t FileOffset;
+ /// 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;
+ /// LastFixupLookup - Cache for the last looked up fixup.
+ mutable unsigned LastFixupLookup;
+
+ /// Fixups - The list of fixups in this section.
+ std::vector<Fixup> Fixups;
+
/// @}
public:
MCSectionData();
MCSectionData(const MCSection &Section, MCAssembler *A = 0);
- const MCSection &getSection() const { return Section; }
+ const MCSection &getSection() const { return *Section; }
unsigned getAlignment() const { return Alignment; }
void setAlignment(unsigned Value) { Alignment = Value; }
-
- /// @name Section List Access
+ /// @name Fragment Access
/// @{
const FragmentListType &getFragmentList() const { return Fragments; }
size_t size() const { return Fragments.size(); }
+ bool empty() const { return Fragments.empty(); }
+
+ /// @}
+ /// @name Fixup Access
+ /// @{
+
+ std::vector<Fixup> &getFixups() {
+ return Fixups;
+ }
+
+ fixup_iterator fixup_begin() {
+ return Fixups.begin();
+ }
+
+ fixup_iterator fixup_end() {
+ return Fixups.end();
+ }
+
+ size_t fixup_size() const { return Fixups.size(); }
+
/// @}
/// @name Assembler Backend Support
/// @{
//
// FIXME: This could all be kept private to the assembler implementation.
- unsigned getFileSize() const {
+ /// LookupFixup - Look up the fixup for the given \arg Fragment and \arg
+ /// Offset.
+ ///
+ /// If multiple fixups exist for the same fragment and offset it is undefined
+ /// which one is returned.
+ //
+ // FIXME: This isn't horribly slow in practice, but there are much nicer
+ // solutions to applying the fixups.
+ const Fixup *LookupFixup(const MCFragment *Fragment, uint64_t Offset) const;
+
+ 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; }
+ void setFileSize(uint64_t Value) { FileSize = Value; }
- uint64_t getFileOffset() const {
- assert(FileOffset != ~UINT64_C(0) && "File offset not set!");
- return FileOffset;
- }
- void setFileOffset(uint64_t Value) { FileOffset = Value; }
+ /// @}
+};
+
+// 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;
+
+ /// 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;
+ }
+
+ /// 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; }
+
+ /// 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; }
+
+ /// @}
+};
+
+// FIXME: This really doesn't belong here. See comments below.
+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&); // DO NOT IMPLEMENT
void operator=(const MCAssembler&); // DO NOT IMPLEMENT
+ MCContext &Context;
+
raw_ostream &OS;
iplist<MCSectionData> Sections;
+ iplist<MCSymbolData> Symbols;
+
+ std::vector<IndirectSymbolData> IndirectSymbols;
+
+ 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
// 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(raw_ostream &OS);
+ MCAssembler(MCContext &_Context, raw_ostream &OS);
~MCAssembler();
+ MCContext &getContext() const { return Context; }
+
/// Finish - Do final processing and write the object to the output stream.
void Finish();
+ // FIXME: This does not belong here.
+ bool getSubsectionsViaSymbols() const {
+ return SubsectionsViaSymbols;
+ }
+ void setSubsectionsViaSymbols(bool Value) {
+ SubsectionsViaSymbols = Value;
+ }
+
/// @name Section List Access
/// @{
size_t size() const { return Sections.size(); }
+ /// @}
+ /// @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(); }
+
+ size_t symbol_size() const { return Symbols.size(); }
+
+ /// @}
+ /// @name Indirect Symbol 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<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(); }
+
/// @}
};
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