Allow target intrinsics that return multiple values, i.e., struct types,

[oota-llvm.git] / lib / CodeGen / ELFWriter.h

diff --git a/lib/CodeGen/ELFWriter.h b/lib/CodeGen/ELFWriter.h
index 89ab00c397dbe3e7e4599b395294e04681bb623b..ebcfe35ebaadb5663480e4d99dee6ca8d47cb768 100644 (file)
--- a/lib/CodeGen/ELFWriter.h
+++ b/lib/CodeGen/ELFWriter.h
@@ -29,13 +29,18 @@ namespace llvm {
   class GlobalVariable;
   class Mangler;
   class MachineCodeEmitter;
+  class MachineConstantPoolEntry;
   class ObjectCodeEmitter;
   class TargetAsmInfo;
   class TargetELFWriterInfo;
   class raw_ostream;
+  class SectionKind;
+  class MCContext;
 
   typedef std::vector<ELFSym*>::iterator ELFSymIter;
   typedef std::vector<ELFSection*>::iterator ELFSectionIter;
+  typedef SetVector<const GlobalValue*>::const_iterator PendingGblsIter;
+  typedef SetVector<const char *>::const_iterator PendingExtsIter;
 
   /// ELFWriter - This class implements the common target-independent code for
   /// writing ELF files.  Targets should derive a class from this to
@@ -61,6 +66,8 @@ namespace llvm {
     /// Target machine description.
     TargetMachine &TM;
 
+    MCContext &OutContext;
+    
     /// Target Elf Writer description.
     const TargetELFWriterInfo *TEW;
 
@@ -106,11 +113,22 @@ namespace llvm {
     /// the SectionList. Used to quickly gather the Section Index from TAI names
     std::map<std::string, ELFSection*> SectionLookup;
 
+    /// PendingGlobals - Globals not processed as symbols yet.
+    SetVector<const GlobalValue*> PendingGlobals;
+
     /// GblSymLookup - This is a mapping from global value to a symbol index
     /// in the symbol table or private symbols list. This is useful since reloc
-    /// symbol references must be quickly mapped to their indices on the lists
+    /// symbol references must be quickly mapped to their indices on the lists.
     std::map<const GlobalValue*, uint32_t> GblSymLookup;
 
+    /// PendingExternals - Externals not processed as symbols yet.
+    SetVector<const char *> PendingExternals;
+
+    /// ExtSymLookup - This is a mapping from externals to a symbol index
+    /// in the symbol table list. This is useful since reloc symbol references
+    /// must be quickly mapped to their symbol table indices.
+    std::map<const char *, uint32_t> ExtSymLookup;
+
     /// SymbolList - This is the list of symbols emitted to the symbol table.
     /// When the SymbolList is finally built, local symbols must be placed in
     /// the beginning while non-locals at the end.
@@ -120,11 +138,6 @@ namespace llvm {
     /// present in the SymbolList.
     std::vector<ELFSym*> PrivateSyms;
 
-    /// PendingGlobals - List of externally defined symbols that we have been
-    /// asked to emit, but have not seen a reference to.  When a reference
-    /// is seen, the symbol will move from this list to the SymbolList.
-    SetVector<GlobalValue*> PendingGlobals;
-
     // Remove tab from section name prefix. This is necessary becase TAI
     // sometimes return a section name prefixed with elf unused chars. This is
     // a little bit dirty. FIXME: find a better approach, maybe add more
@@ -170,30 +183,6 @@ namespace llvm {
                         ELFSection::SHF_EXECINSTR | ELFSection::SHF_ALLOC);
     }
 
-    /// Get jump table section on the section name returned by TAI
-    ELFSection &getJumpTableSection(std::string SName, unsigned Align) {
-      return getSection(SName, ELFSection::SHT_PROGBITS,
-                        ELFSection::SHF_ALLOC, Align);
-    }
-
-    /// Get a constant pool section based on the section name returned by TAI
-    ELFSection &getConstantPoolSection(std::string SName, unsigned Align) {
-      return getSection(SName, ELFSection::SHT_PROGBITS,
-                        ELFSection::SHF_MERGE | ELFSection::SHF_ALLOC, Align);
-    }
-
-    /// Return the relocation section of section 'S'. 'RelA' is true
-    /// if the relocation section contains entries with addends.
-    ELFSection &getRelocSection(std::string SName, bool RelA, unsigned Align) {
-      std::string RelSName(".rel");
-      unsigned SHdrTy = RelA ? ELFSection::SHT_RELA : ELFSection::SHT_REL;
-
-      if (RelA) RelSName.append("a");
-      RelSName.append(SName);
-
-      return getSection(RelSName, SHdrTy, 0, Align);
-    }
-
     ELFSection &getNonExecStackSection() {
       return getSection(".note.GNU-stack", ELFSection::SHT_PROGBITS, 0, 1);
     }
@@ -224,11 +213,25 @@ namespace llvm {
       return getSection("", ELFSection::SHT_NULL, 0);
     }
 
+    ELFSection &getJumpTableSection();
+    ELFSection &getConstantPoolSection(MachineConstantPoolEntry &CPE);
+    ELFSection &getRelocSection(ELFSection &S);
+
     // Helpers for obtaining ELF specific info.
     unsigned getGlobalELFBinding(const GlobalValue *GV);
     unsigned getGlobalELFType(const GlobalValue *GV);
     unsigned getGlobalELFVisibility(const GlobalValue *GV);
-    unsigned getElfSectionFlags(unsigned Flags);
+    unsigned getElfSectionFlags(SectionKind Kind);
+
+    // addGlobalSymbol - Add a global to be processed and to the
+    // global symbol lookup, use a zero index for non private symbols
+    // because the table index will be determined later.
+    void addGlobalSymbol(const GlobalValue *GV);
+
+    // addExternalSymbol - Add the external to be processed and to the
+    // external symbol lookup, use a zero index because the symbol
+    // table index will be determined later
+    void addExternalSymbol(const char *External);
 
     // As we complete the ELF file, we need to update fields in the ELF header
     // (e.g. the location of the section table).  These members keep track of
@@ -250,8 +253,10 @@ namespace llvm {
     void EmitSectionTableStringTable();
     void EmitSymbol(BinaryObject &SymbolTable, ELFSym &Sym);
     void EmitSymbolTable();
-    void EmitStringTable();
+    void EmitStringTable(const std::string &ModuleName);
     void OutputSectionsAndSectionTable();
+    void RelocateField(BinaryObject &BO, uint32_t Offset, int64_t Value,
+                       unsigned Size);
     unsigned SortSymbols();
   };
 }