lib/Target/PowerPC/PPCMachOWriterInfo.h

   1 //===-- PPCMachOWriterInfo.h - Mach-O Writer Info for PowerPC ---*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements Mach-O writer information for the PowerPC backend.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef PPC_MACHO_WRITER_INFO_H
  15 #define PPC_MACHO_WRITER_INFO_H
  16
  17 #include "llvm/Target/TargetMachOWriterInfo.h"
  18
  19 namespace llvm {
  20
  21   // Forward declarations
  22   class MachineRelocation;
  23   class OutputBuffer;
  24   class PPCTargetMachine;
  25
  26   class PPCMachOWriterInfo : public TargetMachOWriterInfo {
  27   public:
  28     PPCMachOWriterInfo(const PPCTargetMachine &TM);
  29     virtual ~PPCMachOWriterInfo();
  30
  31     virtual unsigned GetTargetRelocation(MachineRelocation &MR,
  32                                          unsigned FromIdx,
  33                                          unsigned ToAddr,
  34                                          unsigned ToIdx,
  35                                          OutputBuffer &RelocOut,
  36                                          OutputBuffer &SecOut,
  37                                          bool Scattered, bool Extern) const;
  38
  39     // Constants for the relocation r_type field.
  40     // See <mach-o/ppc/reloc.h>
  41     enum {
  42       PPC_RELOC_VANILLA, // generic relocation
  43       PPC_RELOC_PAIR,    // the second relocation entry of a pair
  44       PPC_RELOC_BR14,    // 14 bit branch displacement to word address
  45       PPC_RELOC_BR24,    // 24 bit branch displacement to word address
  46       PPC_RELOC_HI16,    // a PAIR follows with the low 16 bits
  47       PPC_RELOC_LO16,    // a PAIR follows with the high 16 bits
  48       PPC_RELOC_HA16,    // a PAIR follows, which is sign extended to 32b
  49       PPC_RELOC_LO14     // LO16 with low 2 bits implicitly zero
  50     };
  51   };
  52
  53 } // end llvm namespace
  54
  55 #endif // PPC_MACHO_WRITER_INFO_H