On ELF, create relocations to the abbreviation and line sections when producing

[oota-llvm.git] / include / llvm / MC / MCDwarf.h

diff --git a/include/llvm/MC/MCDwarf.h b/include/llvm/MC/MCDwarf.h
index 99349b73e43f7780d7a31013f9863b371945a0de..a0fc9e50cb8ed19563a7c5349e3115294923b185 100644 (file)
--- a/include/llvm/MC/MCDwarf.h
+++ b/include/llvm/MC/MCDwarf.h
@@ -16,20 +16,23 @@
 #define LLVM_MC_MCDWARF_H
 
 #include "llvm/ADT/StringRef.h"
+#include "llvm/MC/MachineLocation.h"
 #include "llvm/MC/MCObjectWriter.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Support/Dwarf.h"
 #include <vector>
 
 namespace llvm {
-  class MachineMove;
   class MCContext;
+  class MCExpr;
   class MCSection;
   class MCSectionData;
   class MCStreamer;
   class MCSymbol;
   class MCObjectStreamer;
   class raw_ostream;
+  class SourceMgr;
+  class SMLoc;
 
   /// MCDwarfFile - Instances of this class represent the name of the dwarf
   /// .file directive and its associated dwarf file number in the MC file,
@@ -209,7 +212,7 @@ namespace llvm {
     //
     // This emits the Dwarf file and the line tables.
     //
-    static void Emit(MCStreamer *MCOS);
+    static const MCSymbol *Emit(MCStreamer *MCOS);
   };
 
   class MCDwarfLineAddr {
@@ -226,12 +229,101 @@ namespace llvm {
                       int64_t LineDelta, uint64_t AddrDelta);
   };
 
+  class MCGenDwarfInfo {
+  public:
+    //
+    // When generating dwarf for assembly source files this emits the Dwarf
+    // sections.
+    //
+    static void Emit(MCStreamer *MCOS, const MCSymbol *LineSectionSymbol);
+  };
+
+  // When generating dwarf for assembly source files this is the info that is
+  // needed to be gathered for each symbol that will have a dwarf label.
+  class MCGenDwarfLabelEntry {
+  private:
+    // Name of the symbol without a leading underbar, if any.
+    StringRef Name;
+    // The dwarf file number this symbol is in.
+    unsigned FileNumber;
+    // The line number this symbol is at.
+    unsigned LineNumber;
+    // The low_pc for the dwarf label is taken from this symbol.
+    MCSymbol *Label;
+
+  public:
+    MCGenDwarfLabelEntry(StringRef name, unsigned fileNumber,
+                         unsigned lineNumber, MCSymbol *label) :
+      Name(name), FileNumber(fileNumber), LineNumber(lineNumber), Label(label){}
+
+    StringRef getName() const { return Name; }
+    unsigned getFileNumber() const { return FileNumber; }
+    unsigned getLineNumber() const { return LineNumber; }
+    MCSymbol *getLabel() const { return Label; }
+
+    // This is called when label is created when we are generating dwarf for
+    // assembly source files.
+    static void Make(MCSymbol *Symbol, MCStreamer *MCOS, SourceMgr &SrcMgr,
+                     SMLoc &Loc);
+  };
+
+  class MCCFIInstruction {
+  public:
+    enum OpType { SameValue, RememberState, RestoreState, Move, RelMove, Escape,
+                  Restore};
+  private:
+    OpType Operation;
+    MCSymbol *Label;
+    // Move to & from location.
+    MachineLocation Destination;
+    MachineLocation Source;
+    std::vector<char> Values;
+  public:
+    MCCFIInstruction(OpType Op, MCSymbol *L)
+      : Operation(Op), Label(L) {
+      assert(Op == RememberState || Op == RestoreState);
+    }
+    MCCFIInstruction(OpType Op, MCSymbol *L, unsigned Register)
+      : Operation(Op), Label(L), Destination(Register) {
+      assert(Op == SameValue || Op == Restore);
+    }
+    MCCFIInstruction(MCSymbol *L, const MachineLocation &D,
+                     const MachineLocation &S)
+      : Operation(Move), Label(L), Destination(D), Source(S) {
+    }
+    MCCFIInstruction(OpType Op, MCSymbol *L, const MachineLocation &D,
+                     const MachineLocation &S)
+      : Operation(Op), Label(L), Destination(D), Source(S) {
+      assert(Op == RelMove);
+    }
+    MCCFIInstruction(OpType Op, MCSymbol *L, StringRef Vals)
+      : Operation(Op), Label(L), Values(Vals.begin(), Vals.end()) {
+      assert(Op == Escape);
+    }
+    OpType getOperation() const { return Operation; }
+    MCSymbol *getLabel() const { return Label; }
+    const MachineLocation &getDestination() const { return Destination; }
+    const MachineLocation &getSource() const { return Source; }
+    const StringRef getValues() const {
+      return StringRef(&Values[0], Values.size());
+    }
+  };
+
   struct MCDwarfFrameInfo {
+    MCDwarfFrameInfo() : Begin(0), End(0), Personality(0), Lsda(0),
+                         Function(0), Instructions(), PersonalityEncoding(),
+                         LsdaEncoding(0), CompactUnwindEncoding(0),
+                         IsSignalFrame(false) {}
     MCSymbol *Begin;
     MCSymbol *End;
     const MCSymbol *Personality;
     const MCSymbol *Lsda;
+    const MCSymbol *Function;
+    std::vector<MCCFIInstruction> Instructions;
     unsigned PersonalityEncoding;
+    unsigned LsdaEncoding;
+    uint32_t CompactUnwindEncoding;
+    bool IsSignalFrame;
   };
 
   class MCDwarfFrameEmitter {
@@ -239,7 +331,10 @@ namespace llvm {
     //
     // This emits the frame info section.
     //
-    static void Emit(MCStreamer &streamer);
+    static void Emit(MCStreamer &streamer, bool usingCFI,
+                     bool isEH);
+    static void EmitAdvanceLoc(MCStreamer &Streamer, uint64_t AddrDelta);
+    static void EncodeAdvanceLoc(uint64_t AddrDelta, raw_ostream &OS);
   };
 } // end namespace llvm