1//===-- ARMELFWriterInfo.h - ELF Writer Info for ARM ------------*- 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 ELF writer information for the ARM backend.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef ARM_ELF_WRITER_INFO_H
15#define ARM_ELF_WRITER_INFO_H
16
17#include "llvm/Target/TargetELFWriterInfo.h"
18
19namespace llvm {
20
21  class ARMELFWriterInfo : public TargetELFWriterInfo {
22  public:
23    ARMELFWriterInfo(TargetMachine &TM);
24    virtual ~ARMELFWriterInfo();
25
26    /// getRelocationType - Returns the target specific ELF Relocation type.
27    /// 'MachineRelTy' contains the object code independent relocation type
28    virtual unsigned getRelocationType(unsigned MachineRelTy) const;
29
30    /// hasRelocationAddend - True if the target uses an addend in the
31    /// ELF relocation entry.
32    virtual bool hasRelocationAddend() const { return false; }
33
34    /// getDefaultAddendForRelTy - Gets the default addend value for a
35    /// relocation entry based on the target ELF relocation type.
36    virtual long int getDefaultAddendForRelTy(unsigned RelTy,
37                                              long int Modifier = 0) const;
38
39    /// getRelTySize - Returns the size of relocatable field in bits
40    virtual unsigned getRelocationTySize(unsigned RelTy) const;
41
42    /// isPCRelativeRel - True if the relocation type is pc relative
43    virtual bool isPCRelativeRel(unsigned RelTy) const;
44
45    /// getJumpTableRelocationTy - Returns the machine relocation type used
46    /// to reference a jumptable.
47    virtual unsigned getAbsoluteLabelMachineRelTy() const;
48
49    /// computeRelocation - Some relocatable fields could be relocated
50    /// directly, avoiding the relocation symbol emission, compute the
51    /// final relocation value for this symbol.
52    virtual long int computeRelocation(unsigned SymOffset, unsigned RelOffset,
53                                       unsigned RelTy) const;
54  };
55
56} // end llvm namespace
57
58#endif // ARM_ELF_WRITER_INFO_H
59