#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/MC/MCInst.h"
#include "llvm/Support/DataTypes.h"
#include <vector> // FIXME: Shouldn't be needed.
class raw_ostream;
class MCAsmLayout;
class MCAssembler;
-class MCBinaryExpr;
class MCContext;
class MCCodeEmitter;
class MCExpr;
class MCSymbol;
class MCSymbolData;
class MCValue;
-class TargetAsmBackend;
+class MCAsmBackend;
class MCFragment : public ilist_node<MCFragment> {
friend class MCAsmLayout;
- MCFragment(const MCFragment&); // DO NOT IMPLEMENT
- void operator=(const MCFragment&); // DO NOT IMPLEMENT
+ MCFragment(const MCFragment&) LLVM_DELETED_FUNCTION;
+ void operator=(const MCFragment&) LLVM_DELETED_FUNCTION;
public:
enum FragmentType {
FT_Inst,
FT_Org,
FT_Dwarf,
+ FT_DwarfFrame,
FT_LEB
};
/// initialized.
uint64_t Offset;
- /// EffectiveSize - The compute size of this section. This is ~0 until
- /// initialized.
- uint64_t EffectiveSize;
-
- /// LayoutOrder - The global layout order of this fragment. This is the index
- /// across all fragments in the file, not just within the section.
+ /// LayoutOrder - The layout order of this fragment.
unsigned LayoutOrder;
/// @}
unsigned getLayoutOrder() const { return LayoutOrder; }
void setLayoutOrder(unsigned Value) { LayoutOrder = Value; }
- static bool classof(const MCFragment *O) { return true; }
-
void dump();
};
class MCDataFragment : public MCFragment {
+ virtual void anchor();
SmallString<32> Contents;
/// Fixups - The list of fixups in this fragment.
void addFixup(MCFixup Fixup) {
// Enforce invariant that fixups are in offset order.
- assert((Fixups.empty() || Fixup.getOffset() > Fixups.back().getOffset()) &&
+ assert((Fixups.empty() || Fixup.getOffset() >= Fixups.back().getOffset()) &&
"Fixups must be added in order!");
Fixups.push_back(Fixup);
}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Data;
}
- static bool classof(const MCDataFragment *) { return true; }
};
// FIXME: This current incarnation of MCInstFragment doesn't make much sense, as
// 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;
typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator;
public:
- MCInstFragment(MCInst _Inst, MCSectionData *SD = 0)
+ MCInstFragment(const MCInst &_Inst, MCSectionData *SD = 0)
: MCFragment(FT_Inst, SD), Inst(_Inst) {
}
MCInst &getInst() { return Inst; }
const MCInst &getInst() const { return Inst; }
- void setInst(MCInst Value) { Inst = Value; }
+ void setInst(const MCInst& Value) { Inst = Value; }
/// @}
/// @name Fixup Access
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Inst;
}
- static bool classof(const MCInstFragment *) { return true; }
};
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
/// target dependent.
bool EmitNops : 1;
- /// OnlyAlignAddress - Flag to indicate that this align is only used to adjust
- /// the address space size of a section and that it should not be included as
- /// part of the section size. This flag can only be used on the last fragment
- /// in a section.
- bool OnlyAlignAddress : 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),
- OnlyAlignAddress(false) {}
+ MaxBytesToEmit(_MaxBytesToEmit), EmitNops(false) {}
/// @name Accessors
/// @{
bool hasEmitNops() const { return EmitNops; }
void setEmitNops(bool Value) { EmitNops = Value; }
- bool hasOnlyAlignAddress() const { return OnlyAlignAddress; }
- void setOnlyAlignAddress(bool Value) { OnlyAlignAddress = Value; }
-
/// @}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Align;
}
- static bool classof(const MCAlignFragment *) { return true; }
};
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, or 0 if
+ /// ValueSize - The size (in bytes) of \p Value to use when filling, or 0 if
/// this is a virtual fill fragment.
unsigned ValueSize;
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Fill;
}
- static bool classof(const MCFillFragment *) { return true; }
};
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;
- /// 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), Size(0) {}
+ Offset(&_Offset), Value(_Value) {}
/// @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 {
+ 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;
- /// Size - The current size estimate.
- uint64_t Size;
-
+ SmallString<8> Contents;
public:
MCLEBFragment(const MCExpr &Value_, bool IsSigned_, MCSectionData *SD)
: MCFragment(FT_LEB, SD),
- Value(&Value_), IsSigned(IsSigned_), Size(1) {}
+ Value(&Value_), IsSigned(IsSigned_) { Contents.push_back(0); }
/// @name Accessors
/// @{
bool isSigned() const { return IsSigned; }
- uint64_t getSize() const { return Size; }
-
- void setSize(uint64_t Size_) { Size = Size_; }
+ SmallString<8> &getContents() { return Contents; }
+ const SmallString<8> &getContents() const { return Contents; }
/// @}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_LEB;
}
- static bool classof(const MCLEBFragment *) { return true; }
};
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;
/// make up the address delta between two .loc dwarf directives.
const MCExpr *AddrDelta;
- /// Size - The current size estimate.
- uint64_t Size;
+ SmallString<8> Contents;
public:
MCDwarfLineAddrFragment(int64_t _LineDelta, const MCExpr &_AddrDelta,
- MCSectionData *SD = 0)
+ MCSectionData *SD)
: MCFragment(FT_Dwarf, SD),
- LineDelta(_LineDelta), AddrDelta(&_AddrDelta), Size(1) {}
+ LineDelta(_LineDelta), AddrDelta(&_AddrDelta) { Contents.push_back(0); }
/// @name Accessors
/// @{
const MCExpr &getAddrDelta() const { return *AddrDelta; }
- uint64_t getSize() const { return Size; }
-
- void setSize(uint64_t Size_) { Size = Size_; }
+ SmallString<8> &getContents() { return Contents; }
+ const SmallString<8> &getContents() const { return Contents; }
/// @}
static bool classof(const MCFragment *F) {
return F->getKind() == MCFragment::FT_Dwarf;
}
- static bool classof(const MCDwarfLineAddrFragment *) { 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); }
+
+ /// @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
class MCSectionData : public ilist_node<MCSectionData> {
friend class MCAsmLayout;
- MCSectionData(const MCSectionData&); // DO NOT IMPLEMENT
- void operator=(const MCSectionData&); // DO NOT IMPLEMENT
+ MCSectionData(const MCSectionData&) LLVM_DELETED_FUNCTION;
+ void operator=(const MCSectionData&) LLVM_DELETED_FUNCTION;
public:
typedef iplist<MCFragment> FragmentListType;
//
// 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;
-
/// HasInstructions - Whether this section has had instructions emitted into
/// it.
unsigned HasInstructions : 1;
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;
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;
- TargetAsmBackend &Backend;
+ MCAsmBackend &Backend;
MCCodeEmitter &Emitter;
+ MCObjectWriter &Writer;
+
raw_ostream &OS;
iplist<MCSectionData> Sections;
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;
- unsigned PadSectionToAlignment : 1;
private:
/// Evaluate a fixup to a relocatable expression and the value which should be
/// \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 layed
+ /// \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
- /// \arg Value result is fixed, otherwise the value may change due to
+ /// \p Value result is fixed, otherwise the value may change due to
/// relocation.
- bool EvaluateFixup(const MCObjectWriter &Writer, const MCAsmLayout &Layout,
+ 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 MCObjectWriter &Writer,
- const MCFixup &Fixup, const MCFragment *DF,
+ bool fixupNeedsRelaxation(const MCFixup &Fixup, const MCInstFragment *DF,
const MCAsmLayout &Layout) const;
/// Check whether the given fragment needs relaxation.
- bool FragmentNeedsRelaxation(const MCObjectWriter &Writer,
- const MCInstFragment *IF,
+ bool fragmentNeedsRelaxation(const MCInstFragment *IF,
const MCAsmLayout &Layout) const;
- /// Compute the effective fragment size assuming it is layed out at the given
- /// \arg SectionAddress and \arg FragmentOffset.
- uint64_t ComputeFragmentSize(const MCFragment &F,
- uint64_t SectionAddress,
- uint64_t FragmentOffset) const;
-
- /// LayoutOnce - Perform one layout iteration and return true if any offsets
+ /// layoutOnce - Perform one layout iteration and return true if any offsets
/// were adjusted.
- bool LayoutOnce(const MCObjectWriter &Writer, MCAsmLayout &Layout);
+ bool layoutOnce(MCAsmLayout &Layout);
- bool RelaxInstruction(const MCObjectWriter &Writer, MCAsmLayout &Layout,
- MCInstFragment &IF);
+ bool layoutSectionOnce(MCAsmLayout &Layout, MCSectionData &SD);
- bool RelaxOrg(const MCObjectWriter &Writer, MCAsmLayout &Layout,
- MCOrgFragment &OF);
+ bool relaxInstruction(MCAsmLayout &Layout, MCInstFragment &IF);
- bool RelaxLEB(const MCObjectWriter &Writer, MCAsmLayout &Layout,
- MCLEBFragment &IF);
+ bool relaxLEB(MCAsmLayout &Layout, MCLEBFragment &IF);
- bool RelaxDwarfLineAddr(const MCObjectWriter &Writer, MCAsmLayout &Layout,
- MCDwarfLineAddrFragment &DF);
+ bool relaxDwarfLineAddr(MCAsmLayout &Layout, MCDwarfLineAddrFragment &DF);
+ bool relaxDwarfCallFrameFragment(MCAsmLayout &Layout,
+ MCDwarfCallFrameFragment &DF);
- /// FinishLayout - Finalize a layout, including fragment lowering.
- void FinishLayout(MCAsmLayout &Layout);
+ /// 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;
bool isSymbolLinkerVisible(const MCSymbol &SD) const;
/// Emit the section contents using the given object writer.
- //
- // FIXME: Should MCAssembler always have a reference to the object writer?
- void WriteSectionData(const MCSectionData *Section, const MCAsmLayout &Layout,
- MCObjectWriter *OW) const;
+ void writeSectionData(const MCSectionData *Section,
+ const MCAsmLayout &Layout) const;
- void AddSectionToTheEnd(const MCObjectWriter &Writer, MCSectionData &SD,
- MCAsmLayout &Layout);
+ /// 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, TargetAsmBackend &_Backend,
- MCCodeEmitter &_Emitter, bool _PadSectionToAlignment,
+ MCAssembler(MCContext &Context_, MCAsmBackend &Backend_,
+ MCCodeEmitter &Emitter_, MCObjectWriter &Writer_,
raw_ostream &OS);
~MCAssembler();
MCContext &getContext() const { return Context; }
- TargetAsmBackend &getBackend() const { return Backend; }
+ 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.
- /// \arg Writer is used for custom object writer (as the MCJIT does),
+ /// \p 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);
+ void Finish();
// FIXME: This does not belong here.
bool getSubsectionsViaSymbols() const {
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
/// @{
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
/// @{
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