introduce WinCOFFStreamer.cpp, patch by Michael Spencer!

llvm-svn: 108102

llvm/include/llvm/MC/MCStreamer.h

@@ -347,6 +347,12 @@ namespace llvm {
                                   raw_ostream &OS, MCCodeEmitter *CE,
                                   bool RelaxAll = false);
 
+  /// createWinCOFFStreamer - Create a machine code streamer which will
+  /// generate Microsoft COFF format object files.
+  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.
   ///

llvm/lib/MC/CMakeLists.txt

@@ -24,5 +24,6 @@ add_llvm_library(LLVMMC
   MCSymbol.cpp
   MCValue.cpp
   MachObjectWriter.cpp
+  WinCOFFStreamer.cpp
   TargetAsmBackend.cpp
   )

llvm/lib/MC/WinCOFFStreamer.cpp

@@ -0,0 +1,198 @@
+//===-- llvm/MC/WinCOFFStreamer.cpp -----------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains an implementation of a Win32 COFF object file streamer.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "WinCOFFStreamer"
+
+#include "llvm/MC/MCObjectStreamer.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCCodeEmitter.h"
+#include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/Target/TargetAsmBackend.h"
+#include "llvm/Support/COFF.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+#define dbg_notimpl(x) \
+  do { dbgs() << "not implemented, " << __FUNCTION__  << " (" << x << ")"; \
+    abort(); } while (false);
+
+namespace {
+class WinCOFFStreamer : public MCObjectStreamer {
+public:
+  WinCOFFStreamer(MCContext &Context,
+                  TargetAsmBackend &TAB,
+                  MCCodeEmitter &CE,
+                  raw_ostream &OS);
+
+  // MCStreamer interface
+
+  virtual void EmitLabel(MCSymbol *Symbol);
+  virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
+  virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
+  virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
+  virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
+  virtual void BeginCOFFSymbolDef(MCSymbol const *Symbol);
+  virtual void EmitCOFFSymbolStorageClass(int StorageClass);
+  virtual void EmitCOFFSymbolType(int Type);
+  virtual void EndCOFFSymbolDef();
+  virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
+  virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+                        unsigned ByteAlignment);
+  virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size);
+  virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
+                    unsigned Size,unsigned ByteAlignment);
+  virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
+                      uint64_t Size, unsigned ByteAlignment);
+  virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
+  virtual void EmitValue(const MCExpr *Value, unsigned Size, 
+                         unsigned AddrSpace);
+  virtual void EmitGPRel32Value(const MCExpr *Value);
+  virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
+                            unsigned ValueSize, unsigned MaxBytesToEmit);
+  virtual void EmitCodeAlignment(unsigned ByteAlignment,
+                                 unsigned MaxBytesToEmit);
+  virtual void EmitValueToOffset(const MCExpr *Offset, unsigned char Value);
+  virtual void EmitFileDirective(StringRef Filename);
+  virtual void EmitDwarfFileDirective(unsigned FileNo,StringRef Filename);
+  virtual void EmitInstruction(const MCInst &Instruction);
+  virtual void Finish();
+};
+} // end anonymous namespace.
+
+WinCOFFStreamer::WinCOFFStreamer(MCContext &Context,
+                                 TargetAsmBackend &TAB,
+                                 MCCodeEmitter &CE,
+                                 raw_ostream &OS)
+    : MCObjectStreamer(Context, TAB, OS, &CE) {
+}
+
+// MCStreamer interface
+
+void WinCOFFStreamer::EmitLabel(MCSymbol *Symbol) {
+}
+
+void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
+  dbg_notimpl("Flag = " << Flag);
+}
+
+void WinCOFFStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+}
+
+void WinCOFFStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
+                                          MCSymbolAttr Attribute) {
+}
+
+void WinCOFFStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
+  dbg_notimpl("Symbol = " << Symbol->getName() << ", DescValue = "<< DescValue);
+}
+
+void WinCOFFStreamer::BeginCOFFSymbolDef(MCSymbol const *Symbol) {
+}
+
+void WinCOFFStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {
+}
+
+void WinCOFFStreamer::EmitCOFFSymbolType(int Type) {
+}
+
+void WinCOFFStreamer::EndCOFFSymbolDef() {
+}
+
+void WinCOFFStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {
+  dbg_notimpl("Symbol = " << Symbol->getName() << ", Value = " << *Value);
+}
+
+void WinCOFFStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+                                      unsigned ByteAlignment) {
+}
+
+void WinCOFFStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {
+}
+
+void WinCOFFStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
+                                  unsigned Size,unsigned ByteAlignment) {
+  MCSectionCOFF const *SectionCOFF =
+    static_cast<MCSectionCOFF const *>(Section);
+
+  dbg_notimpl("Section = " << SectionCOFF->getSectionName() << ", Symbol = " <<
+              Symbol->getName() << ", Size = " << Size << ", ByteAlignment = "
+              << ByteAlignment);
+}
+
+void WinCOFFStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
+                                     uint64_t Size, unsigned ByteAlignment) {
+  MCSectionCOFF const *SectionCOFF =
+    static_cast<MCSectionCOFF const *>(Section);
+
+  dbg_notimpl("Section = " << SectionCOFF->getSectionName() << ", Symbol = " <<
+              Symbol->getName() << ", Size = " << Size << ", ByteAlignment = "
+              << ByteAlignment);
+}
+
+void WinCOFFStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
+}
+
+void WinCOFFStreamer::EmitValue(const MCExpr *Value, unsigned Size,
+                               unsigned AddrSpace) {
+}
+
+void WinCOFFStreamer::EmitGPRel32Value(const MCExpr *Value) {
+  dbg_notimpl("Value = '" << *Value);
+}
+
+void WinCOFFStreamer::EmitValueToAlignment(unsigned ByteAlignment,
+                                          int64_t Value,
+                                          unsigned ValueSize,
+                                          unsigned MaxBytesToEmit) {
+}
+
+void WinCOFFStreamer::EmitCodeAlignment(unsigned ByteAlignment,
+                                       unsigned MaxBytesToEmit = 0) {
+}
+
+void WinCOFFStreamer::EmitValueToOffset(const MCExpr *Offset,
+                                       unsigned char Value = 0) {
+  dbg_notimpl("Offset = '" << *Offset << "', Value = " << Value);
+}
+
+void WinCOFFStreamer::EmitFileDirective(StringRef Filename) {
+  // Ignore for now, linkers don't care, and proper debug
+  // info will be a much large effort.
+}
+
+void WinCOFFStreamer::EmitDwarfFileDirective(unsigned FileNo,
+                                            StringRef Filename) {
+  dbg_notimpl("FileNo = " << FileNo << ", Filename = '" << Filename << "'");
+}
+
+void WinCOFFStreamer::EmitInstruction(const MCInst &Instruction) {
+}
+
+void WinCOFFStreamer::Finish() {
+  MCObjectStreamer::Finish();
+}
+
+namespace llvm
+{
+  MCStreamer *createWinCOFFStreamer(MCContext &Context,
+                                    TargetAsmBackend &TAB,
+                                    MCCodeEmitter &CE,
+                                    raw_ostream &OS) {
+    return new WinCOFFStreamer(Context, TAB, CE, OS);
+  }
+}