Header file for ELF relocations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36597 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 49 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/ELFRelocation.h b/include/llvm/CodeGen/ELFRelocation.h
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+++ b/include/llvm/CodeGen/ELFRelocation.h
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+//=== ELFRelocation.h - ELF Relocation Info ---------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Christopher Lamb and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the ELFRelocation class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_ELF_RELOCATION_H
+#define LLVM_CODEGEN_ELF_RELOCATION_H
+
+namespace llvm {
+
+  /// ELFRelocation - This class contains all the information necessary to
+  /// to generate any 32-bit or 64-bit ELF relocation entry.
+  class ELFRelocation {
+    uint64_t r_offset;    // offset in the section of the object this applies to
+    uint32_t r_symidx;    // symbol table index of the symbol to use
+    uint32_t r_type;      // machine specific relocation type
+    int64_t  r_add;       // explicit relocation addend
+    bool     r_rela;      // if true then the addend is part of the entry
+                          // otherwise the addend is at the location specified
+                          // by r_offset
+  public:      
+  
+    uint64_t getInfo(bool is64Bit = false) const {
+      if (is64Bit)
+        return ((uint64_t)r_symidx << 32) + ((uint64_t)r_type & 0xFFFFFFFFL);
+      else
+        return (r_symidx << 8)  + (r_type & 0xFFL);
+    }
+  
+    uint64_t getOffset() const { return r_offset; }
+    uint64_t getAddress() const { return r_add; }
+  
+    ELFRelocation(uint64_t off, uint32_t sym, uint32_t type, 
+                  bool rela = true, int64_t addend = 0) : 
+      r_offset(off), r_symidx(sym), r_type(type),
+      r_add(addend), r_rela(rela) {}
+  };
+
+} // end llvm namespace
+
+#endif // LLVM_CODEGEN_ELF_RELOCATION_H
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