Add ELF ObjectWriter and Streamer support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111172 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 15 insertions, 2 deletions

diff --git a/include/llvm/MC/MCSectionELF.h b/include/llvm/MC/MCSectionELF.h
index a90aa38156..5de0bf58fe 100644
--- a/include/llvm/MC/MCSectionELF.h
+++ b/include/llvm/MC/MCSectionELF.h
@@ -44,9 +44,9 @@ class MCSectionELF : public MCSection {
 private:
   friend class MCContext;
   MCSectionELF(StringRef Section, unsigned type, unsigned flags,
-               SectionKind K, bool isExplicit)
+               SectionKind K, bool isExplicit, unsigned entrySize)
     : MCSection(SV_ELF, K), SectionName(Section), Type(type), Flags(flags),
-      IsExplicit(isExplicit) {}
+      IsExplicit(isExplicit), EntrySize(entrySize) {}
   ~MCSectionELF();
 public:
 
@@ -174,6 +174,7 @@ public:
   StringRef getSectionName() const { return SectionName; }
   unsigned getType() const { return Type; }
   unsigned getFlags() const { return Flags; }
+  unsigned getEntrySize() const { return EntrySize; }
   
   void PrintSwitchToSection(const MCAsmInfo &MAI,
                             raw_ostream &OS) const;
diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index 5767a94a6b..e152c39e19 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -359,6 +359,12 @@ namespace llvm {
                                     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, TargetAsmBackend &TAB,
+				raw_ostream &OS, MCCodeEmitter *CE,
+				bool RelaxAll = false);
+
   /// createLoggingStreamer - Create a machine code streamer which just logs the
   /// API calls and then dispatches to another streamer.
   ///
diff --git a/include/llvm/Support/ELF.h b/include/llvm/Support/ELF.h
index a4223cf6ca..f33aeb4188 100644
--- a/include/llvm/Support/ELF.h
+++ b/include/llvm/Support/ELF.h
@@ -330,6 +330,12 @@ struct Elf64_Sym {
   }
 };
 
+// The size (in bytes) of symbol table entries.
+enum {
+  SYMENTRY_SIZE32 = 16, // 32-bit symbol entry size
+  SYMENTRY_SIZE64 = 24  // 64-bit symbol entry size.
+};
+
 // Symbol bindings.
 enum {
   STB_LOCAL = 0,   // Local symbol, not visible outside obj file containing def