Issue:

[oota-llvm.git] / include / llvm / Target / TargetELFWriterInfo.h

diff --git a/include/llvm/Target/TargetELFWriterInfo.h b/include/llvm/Target/TargetELFWriterInfo.h
index 809846a0fbe6e86da46664bf1011e2893626dfa0..5e48629cf4d6f1e6fa7415cf9ead4730551cb5a4 100644 (file)
--- a/include/llvm/Target/TargetELFWriterInfo.h
+++ b/include/llvm/Target/TargetELFWriterInfo.h
@@ -14,10 +14,6 @@
 #ifndef LLVM_TARGET_TARGETELFWRITERINFO_H
 #define LLVM_TARGET_TARGETELFWRITERINFO_H
 
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Function.h"
-
 namespace llvm {
 
   //===--------------------------------------------------------------------===//
@@ -29,7 +25,7 @@ namespace llvm {
     // EMachine - This field is the target specific value to emit as the
     // e_machine member of the ELF header.
     unsigned short EMachine;
-    TargetMachine &TM;
+    bool is64Bit, isLittleEndian;
   public:
 
     // Machine architectures
@@ -47,24 +43,77 @@ namespace llvm {
       EM_ARM = 40,     // ARM
       EM_ALPHA = 41,   // DEC Alpha
       EM_SPARCV9 = 43, // SPARC V9
-      EM_X86_64 = 62   // AMD64
+      EM_X86_64 = 62,  // AMD64
+      EM_HEXAGON = 164 // Qualcomm Hexagon
+    };
+
+    // ELF File classes
+    enum {
+      ELFCLASS32 = 1, // 32-bit object file
+      ELFCLASS64 = 2  // 64-bit object file
+    };
+
+    // ELF Endianess
+    enum {
+      ELFDATA2LSB = 1, // Little-endian object file
+      ELFDATA2MSB = 2  // Big-endian object file
     };
 
-    explicit TargetELFWriterInfo(TargetMachine &tm) : TM(tm) {}
-    virtual ~TargetELFWriterInfo() {}
+    explicit TargetELFWriterInfo(bool is64Bit_, bool isLittleEndian_);
+    virtual ~TargetELFWriterInfo();
 
     unsigned short getEMachine() const { return EMachine; }
+    unsigned getEFlags() const { return 0; }
+    unsigned getEIClass() const { return is64Bit ? ELFCLASS64 : ELFCLASS32; }
+    unsigned getEIData() const {
+      return isLittleEndian ? ELFDATA2LSB : ELFDATA2MSB;
+    }
+
+    /// ELF Header and ELF Section Header Info
+    unsigned getHdrSize() const { return is64Bit ? 64 : 52; }
+    unsigned getSHdrSize() const { return is64Bit ? 64 : 40; }
+
+    /// Symbol Table Info
+    unsigned getSymTabEntrySize() const { return is64Bit ? 24 : 16; }
 
-    /// getFunctionAlignment - Returns the alignment for function 'F', targets
-    /// with different alignment constraints should overload this method
-    virtual unsigned getFunctionAlignment(const Function *F) const {
-      const TargetData *TD = TM.getTargetData();
-      unsigned FnAlign = F->getAlignment();
-      unsigned TDAlign = TD->getPointerABIAlignment();
-      unsigned Align = std::max(FnAlign, TDAlign);
-      assert(!(Align & (Align-1)) && "Alignment is not a power of two!");
-      return Align;
+    /// getPrefELFAlignment - Returns the preferred alignment for ELF. This
+    /// is used to align some sections.
+    unsigned getPrefELFAlignment() const { return is64Bit ? 8 : 4; }
+
+    /// getRelocationEntrySize - Entry size used in the relocation section
+    unsigned getRelocationEntrySize() const {
+      return is64Bit ? (hasRelocationAddend() ? 24 : 16)
+                     : (hasRelocationAddend() ? 12 : 8);
     }
+
+    /// getRelocationType - Returns the target specific ELF Relocation type.
+    /// 'MachineRelTy' contains the object code independent relocation type
+    virtual unsigned getRelocationType(unsigned MachineRelTy) const = 0;
+
+    /// hasRelocationAddend - True if the target uses an addend in the
+    /// ELF relocation entry.
+    virtual bool hasRelocationAddend() const = 0;
+
+    /// getDefaultAddendForRelTy - Gets the default addend value for a
+    /// relocation entry based on the target ELF relocation type.
+    virtual long int getDefaultAddendForRelTy(unsigned RelTy,
+                                              long int Modifier = 0) const = 0;
+
+    /// getRelTySize - Returns the size of relocatable field in bits
+    virtual unsigned getRelocationTySize(unsigned RelTy) const = 0;
+
+    /// isPCRelativeRel - True if the relocation type is pc relative
+    virtual bool isPCRelativeRel(unsigned RelTy) const = 0;
+
+    /// getJumpTableRelocationTy - Returns the machine relocation type used
+    /// to reference a jumptable.
+    virtual unsigned getAbsoluteLabelMachineRelTy() const = 0;
+
+    /// computeRelocation - Some relocatable fields could be relocated
+    /// directly, avoiding the relocation symbol emission, compute the
+    /// final relocation value for this symbol.
+    virtual long int computeRelocation(unsigned SymOffset, unsigned RelOffset,
+                                       unsigned RelTy) const = 0;
   };
 
 } // end llvm namespace