#ifndef LLVM_MC_MCCONTEXT_H
#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"
+#include "llvm/Support/raw_ostream.h"
+#include <vector> // FIXME: Shouldn't be needed.
namespace llvm {
+ class MCAsmInfo;
class MCExpr;
class MCSection;
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:
- /// Sections - Bindings of names to allocated sections.
- StringMap<MCSection*> Sections;
+ /// The MCAsmInfo for this target.
+ const MCAsmInfo &MAI;
- /// Symbols - Bindings of names to symbols.
- StringMap<MCSymbol*> Symbols;
+ 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.
+ 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.
+ unsigned NextUniqueID;
+
+ /// Instances of directional local labels.
+ DenseMap<unsigned, MCLabel *> Instances;
+ /// NextInstance() creates the next instance of the directional local label
+ /// for the LocalLabelVal and adds it to the map if needed.
+ unsigned NextInstance(int64_t LocalLabelVal);
+ /// 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 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;
+ /// The stream that gets written to for the .secure_log_unique directive.
+ raw_ostream *SecureLog;
+ /// Boolean toggled when .secure_log_unique / .secure_log_reset is seen to
+ /// catch errors if .secure_log_unique appears twice without
+ /// .secure_log_reset appearing between them.
+ bool SecureLogUsed;
+
+ /// The dwarf file and directory tables from the dwarf .file directive.
+ std::vector<MCDwarfFile *> MCDwarfFiles;
+ std::vector<StringRef> MCDwarfDirs;
+
+ /// 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:
- MCContext();
+ explicit MCContext(const MCAsmInfo &MAI, const TargetAsmInfo *TAI);
~MCContext();
- /// @name Symbol Managment
+ const MCAsmInfo &getAsmInfo() const { return MAI; }
+
+ const TargetAsmInfo &getTargetAsmInfo() const { return *TAI; }
+
+ void setAllowTemporaryLabels(bool Value) { AllowTemporaryLabels = Value; }
+
+ /// @name Symbol Management
/// @{
- /// CreateSymbol - Create a new symbol with the specified @param Name.
- ///
- /// @param Name - The symbol name, which must be unique across all symbols.
- MCSymbol *CreateSymbol(const StringRef &Name);
+ /// CreateTempSymbol - Create and return a new assembler temporary symbol
+ /// with a unique but unspecified name.
+ MCSymbol *CreateTempSymbol();
+
+ /// 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
+ /// symbol for numbered label (used for "1b" or 1f" references).
+ MCSymbol *GetDirectionalLocalSymbol(int64_t LocalLabelVal, int bORf);
/// GetOrCreateSymbol - Lookup the symbol inside with the specified
- /// @param Name. If it exists, return it. If not, create a forward
+ /// @p Name. If it exists, return it. If not, create a forward
/// reference and return it.
///
/// @param Name - The symbol name, which must be unique across all symbols.
- /// @param IsTemporary - Whether this symbol is an assembler temporary,
- /// which should not survive into the symbol table for the translation unit.
- MCSymbol *GetOrCreateSymbol(const StringRef &Name);
+ MCSymbol *GetOrCreateSymbol(StringRef Name);
MCSymbol *GetOrCreateSymbol(const Twine &Name);
- /// CreateTemporarySymbol - Create a new temporary symbol with the specified
- /// @param Name.
- ///
- /// @param Name - The symbol name, for debugging purposes only, temporary
- /// symbols do not surive assembly. If non-empty the name must be unique
- /// across all symbols.
- MCSymbol *CreateTemporarySymbol(const StringRef &Name = "");
+ /// 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 Management
+ /// @{
+
+ /// getMachOSection - Return the MCSection for the specified mach-o section.
+ /// This requires the operands to be valid.
+ const MCSectionMachO *getMachOSection(StringRef Segment,
+ StringRef Section,
+ unsigned TypeAndAttributes,
+ unsigned Reserved2,
+ SectionKind K);
+ const MCSectionMachO *getMachOSection(StringRef Segment,
+ StringRef Section,
+ unsigned TypeAndAttributes,
+ SectionKind K) {
+ return getMachOSection(Segment, Section, TypeAndAttributes, 0, K);
+ }
+
+ 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);
+
+ const MCSection *getCOFFSection(StringRef Section, unsigned Characteristics,
+ SectionKind Kind) {
+ return getCOFFSection (Section, Characteristics, 0, Kind);
+ }
- /// LookupSymbol - Get the symbol for @param Name, or null.
- MCSymbol *LookupSymbol(const StringRef &Name) const;
/// @}
+ /// @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; }
+
+ /// @}
+
+ char *getSecureLogFile() { return SecureLogFile; }
+ raw_ostream *getSecureLog() { return SecureLog; }
+ bool getSecureLogUsed() { return SecureLogUsed; }
+ void setSecureLog(raw_ostream *Value) {
+ SecureLog = Value;
+ }
+ void setSecureLogUsed(bool Value) {
+ SecureLogUsed = Value;
+ }
+
void *Allocate(unsigned Size, unsigned Align = 8) {
return Allocator.Allocate(Size, Align);
}
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