#ifndef LLVM_MC_MCSTREAMER_H
#define LLVM_MC_MCSTREAMER_H
-#include "llvm/System/DataTypes.h"
+#include "llvm/Support/DataTypes.h"
#include "llvm/MC/MCDirectives.h"
+#include "llvm/MC/MCDwarf.h"
+#include "llvm/MC/MCWin64EH.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/SmallVector.h"
namespace llvm {
- class MCAsmInfo;
+ class MCAsmBackend;
class MCCodeEmitter;
class MCContext;
class MCExpr;
class MCSection;
class MCSymbol;
class StringRef;
- class TargetAsmBackend;
class Twine;
class raw_ostream;
class formatted_raw_ostream;
MCStreamer(const MCStreamer&); // DO NOT IMPLEMENT
MCStreamer &operator=(const MCStreamer&); // DO NOT IMPLEMENT
+ bool EmitEHFrame;
+ bool EmitDebugFrame;
+
+ std::vector<MCDwarfFrameInfo> FrameInfos;
+ MCDwarfFrameInfo *getCurrentFrameInfo();
+ void EnsureValidFrame();
+
+ std::vector<MCWin64EHUnwindInfo *> W64UnwindInfos;
+ MCWin64EHUnwindInfo *CurrentW64UnwindInfo;
+ void setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame);
+ void EnsureValidW64UnwindInfo();
+
+ MCSymbol* LastSymbol;
+
+ /// SectionStack - This is stack of current and previous section
+ /// values saved by PushSection.
+ SmallVector<std::pair<const MCSection *,
+ const MCSection *>, 4> SectionStack;
+
protected:
MCStreamer(MCContext &Ctx);
- /// CurSection - This is the current section code is being emitted to, it is
- /// kept up to date by SwitchSection.
- const MCSection *CurSection;
+ const MCExpr *BuildSymbolDiff(MCContext &Context, const MCSymbol *A,
+ const MCSymbol *B);
+
+ const MCExpr *ForceExpAbs(const MCExpr* Expr);
+
+ void RecordProcStart(MCDwarfFrameInfo &Frame);
+ virtual void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame);
+ void RecordProcEnd(MCDwarfFrameInfo &Frame);
+ virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &CurFrame);
+ void EmitFrames(bool usingCFI);
+
+ MCWin64EHUnwindInfo *getCurrentW64UnwindInfo(){return CurrentW64UnwindInfo;}
+ void EmitW64Tables();
public:
virtual ~MCStreamer();
MCContext &getContext() const { return Context; }
+ unsigned getNumFrameInfos() {
+ return FrameInfos.size();
+ }
+
+ const MCDwarfFrameInfo &getFrameInfo(unsigned i) {
+ return FrameInfos[i];
+ }
+
+ ArrayRef<MCDwarfFrameInfo> getFrameInfos() {
+ return FrameInfos;
+ }
+
+ unsigned getNumW64UnwindInfos() {
+ return W64UnwindInfos.size();
+ }
+
+ MCWin64EHUnwindInfo &getW64UnwindInfo(unsigned i) {
+ return *W64UnwindInfos[i];
+ }
+
/// @name Assembly File Formatting.
/// @{
-
+
/// isVerboseAsm - Return true if this streamer supports verbose assembly
/// and if it is enabled.
virtual bool isVerboseAsm() const { return false; }
-
+
/// hasRawTextSupport - Return true if this asm streamer supports emitting
/// unformatted text to the .s file with EmitRawText.
virtual bool hasRawTextSupport() const { return false; }
/// If the comment includes embedded \n's, they will each get the comment
/// prefix as appropriate. The added comment should not end with a \n.
virtual void AddComment(const Twine &T) {}
-
+
/// GetCommentOS - Return a raw_ostream that comments can be written to.
/// Unlike AddComment, you are required to terminate comments with \n if you
/// use this method.
virtual raw_ostream &GetCommentOS();
-
+
/// AddBlankLine - Emit a blank line to a .s file to pretty it up.
virtual void AddBlankLine() {}
-
+
/// @}
-
+
/// @name Symbol & Section Management
/// @{
-
+
/// getCurrentSection - Return the current section that the streamer is
/// emitting code to.
- const MCSection *getCurrentSection() const { return CurSection; }
+ const MCSection *getCurrentSection() const {
+ if (!SectionStack.empty())
+ return SectionStack.back().first;
+ return NULL;
+ }
+
+ /// getPreviousSection - Return the previous section that the streamer is
+ /// emitting code to.
+ const MCSection *getPreviousSection() const {
+ if (!SectionStack.empty())
+ return SectionStack.back().second;
+ return NULL;
+ }
+
+ /// ChangeSection - Update streamer for a new active section.
+ ///
+ /// This is called by PopSection and SwitchSection, if the current
+ /// section changes.
+ virtual void ChangeSection(const MCSection *) = 0;
+
+ /// pushSection - Save the current and previous section on the
+ /// section stack.
+ void PushSection() {
+ SectionStack.push_back(std::make_pair(getCurrentSection(),
+ getPreviousSection()));
+ }
+
+ /// popSection - Restore the current and previous section from
+ /// the section stack. Calls ChangeSection as needed.
+ ///
+ /// Returns false if the stack was empty.
+ bool PopSection() {
+ if (SectionStack.size() <= 1)
+ return false;
+ const MCSection *oldSection = SectionStack.pop_back_val().first;
+ const MCSection *curSection = SectionStack.back().first;
+
+ if (oldSection != curSection)
+ ChangeSection(curSection);
+ return true;
+ }
/// SwitchSection - Set the current section where code is being emitted to
/// @p Section. This is required to update CurSection.
///
/// This corresponds to assembler directives like .section, .text, etc.
- virtual void SwitchSection(const MCSection *Section) = 0;
-
+ void SwitchSection(const MCSection *Section) {
+ assert(Section && "Cannot switch to a null section!");
+ const MCSection *curSection = SectionStack.back().first;
+ SectionStack.back().second = curSection;
+ if (Section != curSection) {
+ SectionStack.back().first = Section;
+ ChangeSection(Section);
+ }
+ }
+
+ /// SwitchSectionNoChange - Set the current section where code is being
+ /// emitted to @p Section. This is required to update CurSection. This
+ /// version does not call ChangeSection.
+ void SwitchSectionNoChange(const MCSection *Section) {
+ assert(Section && "Cannot switch to a null section!");
+ const MCSection *curSection = SectionStack.back().first;
+ SectionStack.back().second = curSection;
+ if (Section != curSection)
+ SectionStack.back().first = Section;
+ }
+
+ /// InitSections - Create the default sections and set the initial one.
+ virtual void InitSections() = 0;
+
/// EmitLabel - Emit a label for @p Symbol into the current section.
///
/// This corresponds to an assembler statement such as:
/// @param Symbol - The symbol to emit. A given symbol should only be
/// emitted as a label once, and symbols emitted as a label should never be
/// used in an assignment.
- virtual void EmitLabel(MCSymbol *Symbol) = 0;
+ virtual void EmitLabel(MCSymbol *Symbol);
- /// EmitAssemblerFlag - Note in the output the specified @p Flag
+ virtual void EmitEHSymAttributes(const MCSymbol *Symbol,
+ MCSymbol *EHSymbol);
+
+ /// EmitAssemblerFlag - Note in the output the specified @p Flag.
virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) = 0;
+ /// EmitDataRegion - Note in the output the specified region @p Kind.
+ virtual void EmitDataRegion(MCDataRegionType Kind) {}
+
+ /// EmitThumbFunc - Note in the output that the specified @p Func is
+ /// a Thumb mode function (ARM target only).
+ virtual void EmitThumbFunc(MCSymbol *Func) = 0;
+
/// EmitAssignment - Emit an assignment of @p Value to @p Symbol.
///
/// This corresponds to an assembler statement such as:
/// @param Value - The value for the symbol.
virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) = 0;
+ /// EmitWeakReference - Emit an weak reference from @p Alias to @p Symbol.
+ ///
+ /// This corresponds to an assembler statement such as:
+ /// .weakref alias, symbol
+ ///
+ /// @param Alias - The alias that is being created.
+ /// @param Symbol - The symbol being aliased.
+ virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) = 0;
+
/// EmitSymbolAttribute - Add the given @p Attribute to @p Symbol.
virtual void EmitSymbolAttribute(MCSymbol *Symbol,
MCSymbolAttr Attribute) = 0;
/// EndCOFFSymbolDef - Marks the end of the symbol definition.
virtual void EndCOFFSymbolDef() = 0;
+ /// EmitCOFFSecRel32 - Emits a COFF section relative relocation.
+ ///
+ /// @param Symbol - Symbol the section relative realocation should point to.
+ virtual void EmitCOFFSecRel32(MCSymbol const *Symbol);
+
/// EmitELFSize - Emit an ELF .size directive.
///
/// This corresponds to an assembler statement such as:
/// .size symbol, expression
///
virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) = 0;
-
+
/// EmitCommonSymbol - Emit a common symbol.
///
/// @param Symbol - The common symbol to emit.
///
/// @param Symbol - The common symbol to emit.
/// @param Size - The size of the common symbol.
- virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) = 0;
-
+ /// @param ByteAlignment - The alignment of the common symbol in bytes.
+ virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) = 0;
+
/// EmitZerofill - Emit the zerofill section and an optional symbol.
///
/// @param Section - The zerofill section to create and or to put the symbol
/// @param ByteAlignment - The alignment of the zerofill symbol if
/// non-zero. This must be a power of 2 on some targets.
virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
- unsigned Size = 0,unsigned ByteAlignment = 0) = 0;
+ uint64_t Size = 0,unsigned ByteAlignment = 0) = 0;
/// EmitTBSSSymbol - Emit a thread local bss (.tbss) symbol.
///
/// @param ByteAlignment - The alignment of the thread local common symbol
/// if non-zero. This must be a power of 2 on some targets.
virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
- uint64_t Size, unsigned ByteAlignment = 0) = 0;
+ uint64_t Size, unsigned ByteAlignment = 0) = 0;
+
/// @}
/// @name Generating Data
/// @{
/// @param Value - The value to emit.
/// @param Size - The size of the integer (in bytes) to emit. This must
/// match a native machine width.
- virtual void EmitValue(const MCExpr *Value, unsigned Size,
- unsigned AddrSpace) = 0;
+ virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
+ unsigned AddrSpace) = 0;
+
+ void EmitValue(const MCExpr *Value, unsigned Size, unsigned AddrSpace = 0);
/// EmitIntValue - Special case of EmitValue that avoids the client having
/// to pass in a MCExpr for constant integers.
- virtual void EmitIntValue(uint64_t Value, unsigned Size,unsigned AddrSpace);
+ virtual void EmitIntValue(uint64_t Value, unsigned Size,
+ unsigned AddrSpace = 0);
+
+ /// EmitAbsValue - Emit the Value, but try to avoid relocations. On MachO
+ /// this is done by producing
+ /// foo = value
+ /// .long foo
+ void EmitAbsValue(const MCExpr *Value, unsigned Size,
+ unsigned AddrSpace = 0);
+
+ virtual void EmitULEB128Value(const MCExpr *Value) = 0;
+
+ virtual void EmitSLEB128Value(const MCExpr *Value) = 0;
+
+ /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
+ /// client having to pass in a MCExpr for constant integers.
+ void EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace = 0,
+ unsigned Padding = 0);
+
+ /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
+ /// client having to pass in a MCExpr for constant integers.
+ void EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace = 0);
/// EmitSymbolValue - Special case of EmitValue that avoids the client
/// having to pass in a MCExpr for MCSymbols.
- virtual void EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
- unsigned AddrSpace);
-
+ void EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
+ unsigned AddrSpace = 0);
+
+ /// EmitGPRel64Value - Emit the expression @p Value into the output as a
+ /// gprel64 (64-bit GP relative) value.
+ ///
+ /// This is used to implement assembler directives such as .gpdword on
+ /// targets that support them.
+ virtual void EmitGPRel64Value(const MCExpr *Value);
+
/// EmitGPRel32Value - Emit the expression @p Value into the output as a
/// gprel32 (32-bit GP relative) value.
///
/// This is used to implement assembler directives such as .gprel32 on
/// targets that support them.
- virtual void EmitGPRel32Value(const MCExpr *Value) = 0;
-
+ virtual void EmitGPRel32Value(const MCExpr *Value);
+
/// EmitFill - Emit NumBytes bytes worth of the value specified by
/// FillValue. This implements directives such as '.space'.
virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue,
unsigned AddrSpace);
-
+
/// EmitZeros - Emit NumBytes worth of zeros. This is a convenience
/// function that just wraps EmitFill.
void EmitZeros(uint64_t NumBytes, unsigned AddrSpace) {
EmitFill(NumBytes, 0, AddrSpace);
}
-
+
/// EmitValueToAlignment - Emit some number of copies of @p Value until
/// the byte alignment @p ByteAlignment is reached.
///
/// @param Offset - The offset to reach. This may be an expression, but the
/// expression must be associated with the current section.
/// @param Value - The value to use when filling bytes.
- virtual void EmitValueToOffset(const MCExpr *Offset,
+ /// @return false on success, true if the offset was invalid.
+ virtual bool EmitValueToOffset(const MCExpr *Offset,
unsigned char Value = 0) = 0;
-
+
/// @}
-
+
/// EmitFileDirective - Switch to a new logical file. This is used to
/// implement the '.file "foo.c"' assembler directive.
virtual void EmitFileDirective(StringRef Filename) = 0;
-
+
/// EmitDwarfFileDirective - Associate a filename with a specified logical
/// file number. This implements the DWARF2 '.file 4 "foo.c"' assembler
/// directive.
- virtual void EmitDwarfFileDirective(unsigned FileNo,StringRef Filename) = 0;
+ virtual bool EmitDwarfFileDirective(unsigned FileNo, StringRef Directory,
+ StringRef Filename);
+
+ /// EmitDwarfLocDirective - This implements the DWARF2
+ // '.loc fileno lineno ...' assembler directive.
+ virtual void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
+ unsigned Column, unsigned Flags,
+ unsigned Isa,
+ unsigned Discriminator,
+ StringRef FileName);
+
+ virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
+ const MCSymbol *LastLabel,
+ const MCSymbol *Label,
+ unsigned PointerSize) = 0;
+
+ virtual void EmitDwarfAdvanceFrameAddr(const MCSymbol *LastLabel,
+ const MCSymbol *Label) {
+ }
+
+ void EmitDwarfSetLineAddr(int64_t LineDelta, const MCSymbol *Label,
+ int PointerSize);
+
+ virtual void EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding);
+ virtual void EmitCFISections(bool EH, bool Debug);
+ void EmitCFIStartProc();
+ void EmitCFIEndProc();
+ virtual void EmitCFIDefCfa(int64_t Register, int64_t Offset);
+ virtual void EmitCFIDefCfaOffset(int64_t Offset);
+ virtual void EmitCFIDefCfaRegister(int64_t Register);
+ virtual void EmitCFIOffset(int64_t Register, int64_t Offset);
+ virtual void EmitCFIPersonality(const MCSymbol *Sym, unsigned Encoding);
+ virtual void EmitCFILsda(const MCSymbol *Sym, unsigned Encoding);
+ virtual void EmitCFIRememberState();
+ virtual void EmitCFIRestoreState();
+ virtual void EmitCFISameValue(int64_t Register);
+ virtual void EmitCFIRestore(int64_t Register);
+ virtual void EmitCFIRelOffset(int64_t Register, int64_t Offset);
+ virtual void EmitCFIAdjustCfaOffset(int64_t Adjustment);
+ virtual void EmitCFIEscape(StringRef Values);
+ virtual void EmitCFISignalFrame();
+
+ virtual void EmitWin64EHStartProc(const MCSymbol *Symbol);
+ virtual void EmitWin64EHEndProc();
+ virtual void EmitWin64EHStartChained();
+ virtual void EmitWin64EHEndChained();
+ virtual void EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
+ bool Except);
+ virtual void EmitWin64EHHandlerData();
+ virtual void EmitWin64EHPushReg(unsigned Register);
+ virtual void EmitWin64EHSetFrame(unsigned Register, unsigned Offset);
+ virtual void EmitWin64EHAllocStack(unsigned Size);
+ virtual void EmitWin64EHSaveReg(unsigned Register, unsigned Offset);
+ virtual void EmitWin64EHSaveXMM(unsigned Register, unsigned Offset);
+ virtual void EmitWin64EHPushFrame(bool Code);
+ virtual void EmitWin64EHEndProlog();
/// EmitInstruction - Emit the given @p Instruction into the current
/// section.
/// indicated by the hasRawTextSupport() predicate. By default this aborts.
virtual void EmitRawText(StringRef String);
void EmitRawText(const Twine &String);
-
+
+ /// ARM-related methods.
+ /// FIXME: Eventually we should have some "target MC streamer" and move
+ /// these methods there.
+ virtual void EmitFnStart();
+ virtual void EmitFnEnd();
+ virtual void EmitCantUnwind();
+ virtual void EmitPersonality(const MCSymbol *Personality);
+ virtual void EmitHandlerData();
+ virtual void EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset = 0);
+ virtual void EmitPad(int64_t Offset);
+ virtual void EmitRegSave(const SmallVectorImpl<unsigned> &RegList,
+ bool isVector);
+
+ /// FinishImpl - Streamer specific finalization.
+ virtual void FinishImpl() = 0;
/// Finish - Finish emission of machine code.
- virtual void Finish() = 0;
+ void Finish();
};
/// createNullStreamer - Create a dummy machine code streamer, which does
/// \param CE - If given, a code emitter to use to show the instruction
/// encoding inline with the assembly. This method takes ownership of \arg CE.
///
+ /// \param TAB - If given, a target asm backend to use to show the fixup
+ /// information in conjunction with encoding information. This method takes
+ /// ownership of \arg TAB.
+ ///
/// \param ShowInst - Whether to show the MCInst representation inline with
/// the assembly.
MCStreamer *createAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
- bool isLittleEndian, bool isVerboseAsm,
+ bool isVerboseAsm,
+ bool useLoc,
+ bool useCFI,
+ bool useDwarfDirectory,
MCInstPrinter *InstPrint = 0,
MCCodeEmitter *CE = 0,
+ MCAsmBackend *TAB = 0,
bool ShowInst = false);
/// createMachOStreamer - Create a machine code streamer which will generate
/// Mach-O format object files.
///
/// Takes ownership of \arg TAB and \arg CE.
- MCStreamer *createMachOStreamer(MCContext &Ctx, TargetAsmBackend &TAB,
+ MCStreamer *createMachOStreamer(MCContext &Ctx, MCAsmBackend &TAB,
raw_ostream &OS, MCCodeEmitter *CE,
bool RelaxAll = false);
///
/// Takes ownership of \arg TAB and \arg CE.
MCStreamer *createWinCOFFStreamer(MCContext &Ctx,
- TargetAsmBackend &TAB,
- MCCodeEmitter &CE, raw_ostream &OS);
-
- /// createLoggingStreamer - Create a machine code streamer which just logs the
- /// API calls and then dispatches to another streamer.
+ MCAsmBackend &TAB,
+ MCCodeEmitter &CE, raw_ostream &OS,
+ bool RelaxAll = false);
+
+ /// createELFStreamer - Create a machine code streamer which will generate
+ /// ELF format object files.
+ MCStreamer *createELFStreamer(MCContext &Ctx, MCAsmBackend &TAB,
+ raw_ostream &OS, MCCodeEmitter *CE,
+ bool RelaxAll, bool NoExecStack);
+
+ /// createPureStreamer - Create a machine code streamer which will generate
+ /// "pure" MC object files, for use with MC-JIT and testing tools.
///
- /// The new streamer takes ownership of the \arg Child.
- MCStreamer *createLoggingStreamer(MCStreamer *Child, raw_ostream &OS);
+ /// Takes ownership of \arg TAB and \arg CE.
+ MCStreamer *createPureStreamer(MCContext &Ctx, MCAsmBackend &TAB,
+ raw_ostream &OS, MCCodeEmitter *CE);
} // end namespace llvm
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