#include "llvm/Support/Casting.h"
#include "llvm/MC/MCFixup.h"
#include "llvm/MC/MCInst.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 MCBinaryExpr;
class MCContext;
class MCCodeEmitter;
class MCExpr;
class MCValue;
class TargetAsmBackend;
-/// 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.
-//
-// FIXME: This should probably just be merged with MCFixup.
-class MCAsmFixup {
-public:
- /// 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;
-
-public:
- MCAsmFixup(uint64_t _Offset, const MCExpr &_Value, MCFixupKind _Kind)
- : Offset(_Offset), Value(&_Value), Kind(_Kind) {}
-};
-
class MCFragment : public ilist_node<MCFragment> {
friend class MCAsmLayout;
FT_Data,
FT_Fill,
FT_Inst,
- FT_Org
+ FT_Org,
+ FT_Dwarf,
+ FT_LEB
};
private:
/// initialized.
uint64_t EffectiveSize;
- /// Ordinal - The global index of this fragment. This is the index across all
- /// sections, not just the parent section.
- unsigned Ordinal;
+ /// LayoutOrder - The global layout order of this fragment. This is the index
+ /// across all fragments in the file, not just within the section.
+ unsigned LayoutOrder;
/// @}
MCSymbolData *getAtom() const { return Atom; }
void setAtom(MCSymbolData *Value) { Atom = Value; }
- unsigned getOrdinal() const { return Ordinal; }
- void setOrdinal(unsigned Value) { Ordinal = Value; }
+ unsigned getLayoutOrder() const { return LayoutOrder; }
+ void setLayoutOrder(unsigned Value) { LayoutOrder = Value; }
static bool classof(const MCFragment *O) { return true; }
- virtual void dump();
+ void dump();
};
class MCDataFragment : public MCFragment {
SmallString<32> Contents;
/// Fixups - The list of fixups in this fragment.
- std::vector<MCAsmFixup> Fixups;
+ std::vector<MCFixup> Fixups;
public:
- typedef std::vector<MCAsmFixup>::const_iterator const_fixup_iterator;
- typedef std::vector<MCAsmFixup>::iterator fixup_iterator;
+ 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 Fixup Access
/// @{
- void addFixup(MCAsmFixup Fixup) {
+ void addFixup(MCFixup Fixup) {
// Enforce invariant that fixups are in offset order.
- assert((Fixups.empty() || Fixup.Offset > Fixups.back().Offset) &&
+ assert((Fixups.empty() || Fixup.getOffset() > Fixups.back().getOffset()) &&
"Fixups must be added in order!");
Fixups.push_back(Fixup);
}
- std::vector<MCAsmFixup> &getFixups() { return Fixups; }
- const std::vector<MCAsmFixup> &getFixups() const { return Fixups; }
+ std::vector<MCFixup> &getFixups() { return Fixups; }
+ const std::vector<MCFixup> &getFixups() const { return Fixups; }
fixup_iterator fixup_begin() { return Fixups.begin(); }
const_fixup_iterator fixup_begin() const { return Fixups.begin(); }
return F->getKind() == MCFragment::FT_Data;
}
static bool classof(const MCDataFragment *) { return true; }
-
- virtual void dump();
};
// FIXME: This current incarnation of MCInstFragment doesn't make much sense, as
/// Inst - The instruction this is a fragment for.
MCInst Inst;
- /// InstSize - The size of the currently encoded instruction.
+ /// Code - Binary data for the currently encoded instruction.
SmallString<8> Code;
/// Fixups - The list of fixups in this fragment.
- SmallVector<MCAsmFixup, 1> Fixups;
+ SmallVector<MCFixup, 1> Fixups;
public:
- typedef SmallVectorImpl<MCAsmFixup>::const_iterator const_fixup_iterator;
- typedef SmallVectorImpl<MCAsmFixup>::iterator fixup_iterator;
+ typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator;
+ typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
public:
MCInstFragment(MCInst _Inst, MCSectionData *SD = 0)
/// @name Fixup Access
/// @{
- SmallVectorImpl<MCAsmFixup> &getFixups() { return Fixups; }
- const SmallVectorImpl<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(); }
return F->getKind() == MCFragment::FT_Inst;
}
static bool classof(const MCInstFragment *) { return true; }
-
- virtual void dump();
};
class MCAlignFragment : public MCFragment {
return F->getKind() == MCFragment::FT_Align;
}
static bool classof(const MCAlignFragment *) { return true; }
-
- virtual void dump();
};
class MCFillFragment : public MCFragment {
return F->getKind() == MCFragment::FT_Fill;
}
static bool classof(const MCFillFragment *) { return true; }
-
- virtual void dump();
};
class MCOrgFragment : public MCFragment {
/// Value - Value to use for filling bytes.
int8_t Value;
+ /// Size - The current estimate of the size.
+ unsigned Size;
+
public:
MCOrgFragment(const MCExpr &_Offset, int8_t _Value, MCSectionData *SD = 0)
: MCFragment(FT_Org, SD),
- Offset(&_Offset), Value(_Value) {}
+ Offset(&_Offset), Value(_Value), Size(0) {}
/// @name Accessors
/// @{
uint8_t getValue() const { return Value; }
+ unsigned getSize() const { return Size; }
+
+ void setSize(unsigned Size_) { Size = Size_; }
/// @}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Org;
}
static bool classof(const MCOrgFragment *) { return true; }
+};
+
+class MCLEBFragment : public MCFragment {
+ /// Value - The value this fragment should contain.
+ const MCExpr *Value;
+
+ /// IsSigned - True if this is a sleb128, false if uleb128.
+ bool IsSigned;
+
+ /// Size - The current size estimate.
+ uint64_t Size;
+
+public:
+ MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSectionData *SD)
+ : MCFragment(FT_LEB, SD),
+ Value(&Value_), IsSigned(IsSigned_), Size(1) {}
+
+ /// @name Accessors
+ /// @{
+
+ const MCExpr &getValue() const { return *Value; }
+
+ bool isSigned() const { return IsSigned; }
+
+ uint64_t getSize() const { return Size; }
+
+ void setSize(uint64_t Size_) { Size = Size_; }
- virtual void dump();
+ /// @}
+
+ static bool classof(const MCFragment *F) {
+ return F->getKind() == MCFragment::FT_LEB;
+ }
+ static bool classof(const MCLEBFragment *) { return true; }
+};
+
+class MCDwarfLineAddrFragment : public MCFragment {
+ /// 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;
+
+ /// Size - The current size estimate.
+ uint64_t Size;
+
+public:
+ MCDwarfLineAddrFragment(int64_t _LineDelta, const MCExpr &_AddrDelta,
+ MCSectionData *SD = 0)
+ : MCFragment(FT_Dwarf, SD),
+ LineDelta(_LineDelta), AddrDelta(&_AddrDelta), Size(1) {}
+
+ /// @name Accessors
+ /// @{
+
+ int64_t getLineDelta() const { return LineDelta; }
+
+ const MCExpr &getAddrDelta() const { return *AddrDelta; }
+
+ uint64_t getSize() const { return Size; }
+
+ void setSize(uint64_t Size_) { Size = Size_; }
+
+ /// @}
+
+ static bool classof(const MCFragment *F) {
+ return F->getKind() == MCFragment::FT_Dwarf;
+ }
+ static bool classof(const MCDwarfLineAddrFragment *) { return true; }
};
// FIXME: Should this be a separate class, or just merged into MCSection? Since
typedef FragmentListType::reverse_iterator reverse_iterator;
private:
- iplist<MCFragment> Fragments;
+ FragmentListType Fragments;
const MCSection *Section;
/// Ordinal - The section index in the assemblers section list.
// 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!");
unsigned RelaxAll : 1;
unsigned SubsectionsViaSymbols : 1;
+ unsigned PadSectionToAlignment : 1;
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
/// \arg Value result is fixed, otherwise the value may change due to
/// relocation.
- bool EvaluateFixup(const MCAsmLayout &Layout,
- const MCAsmFixup &Fixup, const MCFragment *DF,
+ bool EvaluateFixup(const MCObjectWriter &Writer, 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 MCAsmFixup &Fixup, const MCFragment *DF,
+ bool FixupNeedsRelaxation(const MCObjectWriter &Writer,
+ const MCFixup &Fixup, const MCFragment *DF,
const MCAsmLayout &Layout) const;
/// Check whether the given fragment needs relaxation.
- bool FragmentNeedsRelaxation(const MCInstFragment *IF,
+ bool FragmentNeedsRelaxation(const MCObjectWriter &Writer,
+ const MCInstFragment *IF,
const MCAsmLayout &Layout) const;
/// Compute the effective fragment size assuming it is layed out at the given
/// LayoutOnce - Perform one layout iteration and return true if any offsets
/// were adjusted.
- bool LayoutOnce(MCAsmLayout &Layout);
+ bool LayoutOnce(const MCObjectWriter &Writer, MCAsmLayout &Layout);
+
+ bool RelaxInstruction(const MCObjectWriter &Writer, MCAsmLayout &Layout,
+ MCInstFragment &IF);
+
+ bool RelaxOrg(const MCObjectWriter &Writer, MCAsmLayout &Layout,
+ MCOrgFragment &OF);
+
+ bool RelaxLEB(const MCObjectWriter &Writer, MCAsmLayout &Layout,
+ MCLEBFragment &IF);
+
+ bool RelaxDwarfLineAddr(const MCObjectWriter &Writer, MCAsmLayout &Layout,
+ MCDwarfLineAddrFragment &DF);
/// FinishLayout - Finalize a layout, including fragment lowering.
void FinishLayout(MCAsmLayout &Layout);
public:
/// Find the symbol which defines the atom containing the given symbol, or
/// null if there is no such symbol.
- const MCSymbolData *getAtom(const MCAsmLayout &Layout,
- const MCSymbolData *Symbol) const;
+ 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 MCSymbolData *SD) const;
+ bool isSymbolLinkerVisible(const MCSymbol &SD) const;
/// Emit the section contents using the given object writer.
//
void WriteSectionData(const MCSectionData *Section, const MCAsmLayout &Layout,
MCObjectWriter *OW) const;
+ void AddSectionToTheEnd(const MCObjectWriter &Writer, MCSectionData &SD,
+ MCAsmLayout &Layout);
+
public:
/// Construct a new assembler instance.
///
// option is to make this abstract, and have targets provide concrete
// implementations as we do with AsmParser.
MCAssembler(MCContext &_Context, TargetAsmBackend &_Backend,
- MCCodeEmitter &_Emitter, raw_ostream &OS);
+ MCCodeEmitter &_Emitter, bool _PadSectionToAlignment,
+ raw_ostream &OS);
~MCAssembler();
MCContext &getContext() const { return Context; }
MCCodeEmitter &getEmitter() const { return Emitter; }
/// Finish - Do final processing and write the object to the output stream.
- void Finish();
+ /// \arg Writer is used for custom object writer (as the MCJIT does),
+ /// if not specified it is automatically created from backend.
+ void Finish(MCObjectWriter *Writer = 0);
// FIXME: This does not belong here.
bool getSubsectionsViaSymbols() const {
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