| Wesley Peck | 4e9141f | 2010-10-21 03:57:26 +0000 | [diff] [blame^] | 1 | //===-- MBlazeELFWriterInfo.h - ELF Writer Info for MBlaze ------*- 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 MBlaze backend. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #ifndef MBLAZE_ELF_WRITER_INFO_H |
| 15 | #define MBLAZE_ELF_WRITER_INFO_H |
| 16 | |
| 17 | #include "llvm/Target/TargetELFWriterInfo.h" |
| 18 | |
| 19 | namespace llvm { |
| 20 | |
| 21 | class MBlazeELFWriterInfo : public TargetELFWriterInfo { |
| 22 | |
| 23 | // ELF Relocation types for MBlaze |
| 24 | enum MBlazeRelocationType { |
| 25 | R_MICROBLAZE_NONE = 0, |
| 26 | R_MICROBLAZE_32 = 1, |
| 27 | R_MICROBLAZE_32_PCREL = 2, |
| 28 | R_MICROBLAZE_64_PCREL = 3, |
| 29 | R_MICROBLAZE_32_PCREL_LO = 4, |
| 30 | R_MICROBLAZE_64 = 5, |
| 31 | R_MICROBLAZE_32_LO = 6, |
| 32 | R_MICROBLAZE_SRO32 = 7, |
| 33 | R_MICROBLAZE_SRW32 = 8, |
| 34 | R_MICROBLAZE_64_NONE = 9, |
| 35 | R_MICROBLAZE_32_SYM_OP_SYM = 10, |
| 36 | R_MICROBLAZE_GNU_VTINHERIT = 11, |
| 37 | R_MICROBLAZE_GNU_VTENTRY = 12, |
| 38 | R_MICROBLAZE_GOTPC_64 = 13, |
| 39 | R_MICROBLAZE_GOT_64 = 14, |
| 40 | R_MICROBLAZE_PLT_64 = 15, |
| 41 | R_MICROBLAZE_REL = 16, |
| 42 | R_MICROBLAZE_JUMP_SLOT = 17, |
| 43 | R_MICROBLAZE_GLOB_DAT = 18, |
| 44 | R_MICROBLAZE_GOTOFF_64 = 19, |
| 45 | R_MICROBLAZE_GOTOFF_32 = 20, |
| 46 | R_MICROBLAZE_COPY = 21 |
| 47 | }; |
| 48 | |
| 49 | public: |
| 50 | MBlazeELFWriterInfo(TargetMachine &TM); |
| 51 | virtual ~MBlazeELFWriterInfo(); |
| 52 | |
| 53 | /// getRelocationType - Returns the target specific ELF Relocation type. |
| 54 | /// 'MachineRelTy' contains the object code independent relocation type |
| 55 | virtual unsigned getRelocationType(unsigned MachineRelTy) const; |
| 56 | |
| 57 | /// hasRelocationAddend - True if the target uses an addend in the |
| 58 | /// ELF relocation entry. |
| 59 | virtual bool hasRelocationAddend() const { return false; } |
| 60 | |
| 61 | /// getDefaultAddendForRelTy - Gets the default addend value for a |
| 62 | /// relocation entry based on the target ELF relocation type. |
| 63 | virtual long int getDefaultAddendForRelTy(unsigned RelTy, |
| 64 | long int Modifier = 0) const; |
| 65 | |
| 66 | /// getRelTySize - Returns the size of relocatable field in bits |
| 67 | virtual unsigned getRelocationTySize(unsigned RelTy) const; |
| 68 | |
| 69 | /// isPCRelativeRel - True if the relocation type is pc relative |
| 70 | virtual bool isPCRelativeRel(unsigned RelTy) const; |
| 71 | |
| 72 | /// getJumpTableRelocationTy - Returns the machine relocation type used |
| 73 | /// to reference a jumptable. |
| 74 | virtual unsigned getAbsoluteLabelMachineRelTy() const; |
| 75 | |
| 76 | /// computeRelocation - Some relocatable fields could be relocated |
| 77 | /// directly, avoiding the relocation symbol emission, compute the |
| 78 | /// final relocation value for this symbol. |
| 79 | virtual long int computeRelocation(unsigned SymOffset, unsigned RelOffset, |
| 80 | unsigned RelTy) const; |
| 81 | }; |
| 82 | |
| 83 | } // end llvm namespace |
| 84 | |
| 85 | #endif // MBLAZE_ELF_WRITER_INFO_H |