#define LLVM_MC_MCCONTEXT_H
#include "llvm/MC/SectionKind.h"
+#include "llvm/MC/MCDwarf.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/Support/Allocator.h"
class MCSymbol;
class MCLabel;
class MCDwarfFile;
+ class MCDwarfLoc;
+ class MCLineSection;
class StringRef;
class Twine;
+ class TargetAsmInfo;
class MCSectionMachO;
+ class MCSectionELF;
/// MCContext - Context object for machine code objects. This class owns all
/// of the sections that it creates.
class MCContext {
MCContext(const MCContext&); // DO NOT IMPLEMENT
MCContext &operator=(const MCContext&); // DO NOT IMPLEMENT
+ public:
+ typedef StringMap<MCSymbol*, BumpPtrAllocator&> SymbolTable;
+ private:
/// The MCAsmInfo for this target.
const MCAsmInfo &MAI;
+ const TargetAsmInfo *TAI;
+
+ /// Allocator - Allocator object used for creating machine code objects.
+ ///
+ /// We use a bump pointer allocator to avoid the need to track all allocated
+ /// objects.
+ BumpPtrAllocator Allocator;
+
/// Symbols - Bindings of names to symbols.
- StringMap<MCSymbol*> Symbols;
+ SymbolTable Symbols;
+
+ /// UsedNames - Keeps tracks of names that were used both for used declared
+ /// and artificial symbols.
+ StringMap<bool, BumpPtrAllocator&> UsedNames;
/// NextUniqueID - The next ID to dole out to an unnamed assembler temporary
/// symbol.
/// GetInstance() gets the current instance of the directional local label
/// for the LocalLabelVal and adds it to the map if needed.
unsigned GetInstance(int64_t LocalLabelVal);
-
- /// The file name of the log file from the enviromment variable
+
+ /// The file name of the log file from the environment variable
/// AS_SECURE_LOG_FILE. Which must be set before the .secure_log_unique
/// directive is used or it is an error.
char *SecureLogFile;
std::vector<MCDwarfFile *> MCDwarfFiles;
std::vector<StringRef> MCDwarfDirs;
- /// Allocator - Allocator object used for creating machine code objects.
- ///
- /// We use a bump pointer allocator to avoid the need to track all allocated
- /// objects.
- BumpPtrAllocator Allocator;
-
+ /// The current dwarf line information from the last dwarf .loc directive.
+ MCDwarfLoc CurrentDwarfLoc;
+ bool DwarfLocSeen;
+
+ /// Honor temporary labels, this is useful for debugging semantic
+ /// differences between temporary and non-temporary labels (primarily on
+ /// Darwin).
+ bool AllowTemporaryLabels;
+
+ /// The dwarf line information from the .loc directives for the sections
+ /// with assembled machine instructions have after seeing .loc directives.
+ DenseMap<const MCSection *, MCLineSection *> MCLineSections;
+ /// We need a deterministic iteration order, so we remember the order
+ /// the elements were added.
+ std::vector<const MCSection *> MCLineSectionOrder;
+
void *MachOUniquingMap, *ELFUniquingMap, *COFFUniquingMap;
+
+ MCSymbol *CreateSymbol(StringRef Name);
+
public:
- explicit MCContext(const MCAsmInfo &MAI);
+ explicit MCContext(const MCAsmInfo &MAI, const TargetAsmInfo *TAI);
~MCContext();
-
+
const MCAsmInfo &getAsmInfo() const { return MAI; }
- /// @name Symbol Managment
+ const TargetAsmInfo &getTargetAsmInfo() const { return *TAI; }
+
+ void setAllowTemporaryLabels(bool Value) { AllowTemporaryLabels = Value; }
+
+ /// @name Symbol Management
/// @{
-
+
/// CreateTempSymbol - Create and return a new assembler temporary symbol
/// with a unique but unspecified name.
MCSymbol *CreateTempSymbol();
- /// CreateDirectionalLocalSymbol - Create the defintion of a directional
- /// local symbol for numbered label (used for "1:" defintions).
+ /// CreateDirectionalLocalSymbol - Create the definition of a directional
+ /// local symbol for numbered label (used for "1:" definitions).
MCSymbol *CreateDirectionalLocalSymbol(int64_t LocalLabelVal);
/// GetDirectionalLocalSymbol - Create and return a directional local
/// LookupSymbol - Get the symbol for \p Name, or null.
MCSymbol *LookupSymbol(StringRef Name) const;
+ /// getSymbols - Get a reference for the symbol table for clients that
+ /// want to, for example, iterate over all symbols. 'const' because we
+ /// still want any modifications to the table itself to use the MCContext
+ /// APIs.
+ const SymbolTable &getSymbols() const {
+ return Symbols;
+ }
+
/// @}
-
- /// @name Section Managment
+
+ /// @name Section Management
/// @{
/// getMachOSection - Return the MCSection for the specified mach-o section.
SectionKind K) {
return getMachOSection(Segment, Section, TypeAndAttributes, 0, K);
}
-
- const MCSection *getELFSection(StringRef Section, unsigned Type,
- unsigned Flags, SectionKind Kind,
- bool IsExplicit = false);
+
+ const MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, SectionKind Kind);
+
+ const MCSectionELF *getELFSection(StringRef Section, unsigned Type,
+ unsigned Flags, SectionKind Kind,
+ unsigned EntrySize, StringRef Group);
+
+ const MCSectionELF *CreateELFGroupSection();
const MCSection *getCOFFSection(StringRef Section, unsigned Characteristics,
int Selection, SectionKind Kind);
return getCOFFSection (Section, Characteristics, 0, Kind);
}
-
+
/// @}
- /// @name Dwarf Managment
+ /// @name Dwarf Management
/// @{
/// GetDwarfFile - creates an entry in the dwarf file and directory tables.
unsigned GetDwarfFile(StringRef FileName, unsigned FileNumber);
+ bool isValidDwarfFileNumber(unsigned FileNumber);
+
+ bool hasDwarfFiles() const {
+ return !MCDwarfFiles.empty();
+ }
+
const std::vector<MCDwarfFile *> &getMCDwarfFiles() {
return MCDwarfFiles;
}
+ const std::vector<StringRef> &getMCDwarfDirs() {
+ return MCDwarfDirs;
+ }
+
+ const DenseMap<const MCSection *, MCLineSection *>
+ &getMCLineSections() const {
+ return MCLineSections;
+ }
+ const std::vector<const MCSection *> &getMCLineSectionOrder() const {
+ return MCLineSectionOrder;
+ }
+ void addMCLineSection(const MCSection *Sec, MCLineSection *Line) {
+ MCLineSections[Sec] = Line;
+ MCLineSectionOrder.push_back(Sec);
+ }
+
+ /// setCurrentDwarfLoc - saves the information from the currently parsed
+ /// dwarf .loc directive and sets DwarfLocSeen. When the next instruction
+ /// is assembled an entry in the line number table with this information and
+ /// the address of the instruction will be created.
+ void setCurrentDwarfLoc(unsigned FileNum, unsigned Line, unsigned Column,
+ unsigned Flags, unsigned Isa,
+ unsigned Discriminator) {
+ CurrentDwarfLoc.setFileNum(FileNum);
+ CurrentDwarfLoc.setLine(Line);
+ CurrentDwarfLoc.setColumn(Column);
+ CurrentDwarfLoc.setFlags(Flags);
+ CurrentDwarfLoc.setIsa(Isa);
+ CurrentDwarfLoc.setDiscriminator(Discriminator);
+ DwarfLocSeen = true;
+ }
+ void ClearDwarfLocSeen() { DwarfLocSeen = false; }
+
+ bool getDwarfLocSeen() { return DwarfLocSeen; }
+ const MCDwarfLoc &getCurrentDwarfLoc() { return CurrentDwarfLoc; }
/// @}
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