lib/Target/ARM/ARMELFWriterInfo.h

   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
  19 namespace llvm {
  20
  21   class ARMELFWriterInfo : public TargetELFWriterInfo {
  22
  23     // ELF Relocation types for ARM
  24     // Meets 2.08 ABI Specs. Most of these are not used by the assembler.
  25     // They are here for completeness's sake
  26
  27     enum ARMRelocationType {
  28       R_ARM_NONE                  = 0x00,
  29       R_ARM_PC24                  = 0x01,
  30       R_ARM_ABS32                 = 0x02,
  31       R_ARM_REL32                 = 0x03,
  32       R_ARM_LDR_PC_G0             = 0x04,
  33       R_ARM_ABS16                 = 0x05,
  34       R_ARM_ABS12                 = 0x06,
  35       R_ARM_THM_ABS5              = 0x07,
  36       R_ARM_ABS8                  = 0x08,
  37       R_ARM_SBREL32               = 0x09,
  38       R_ARM_THM_CALL              = 0x0a,
  39       R_ARM_THM_PC8               = 0x0b,
  40       R_ARM_BREL_ADJ              = 0x0c,
  41       R_ARM_TLS_DESC              = 0x0d,
  42       R_ARM_THM_SWI8              = 0x0e,
  43       R_ARM_XPC25                 = 0x0f,
  44       R_ARM_THM_XPC22             = 0x10,
  45       R_ARM_TLS_DTPMOD32          = 0x11,
  46       R_ARM_TLS_DTPOFF32          = 0x12,
  47       R_ARM_TLS_TPOFF32           = 0x13,
  48       R_ARM_COPY                  = 0x14,
  49       R_ARM_GLOB_DAT              = 0x15,
  50       R_ARM_JUMP_SLOT             = 0x16,
  51       R_ARM_RELATIVE              = 0x17,
  52       R_ARM_GOTOFF32              = 0x18,
  53       R_ARM_BASE_PREL             = 0x19,
  54       R_ARM_GOT_BREL              = 0x1a,
  55       R_ARM_PLT32                 = 0x1b,
  56       R_ARM_CALL                  = 0x1c,
  57       R_ARM_JUMP24                = 0x1d,
  58       R_ARM_THM_JUMP24            = 0x1e,
  59       R_ARM_BASE_ABS              = 0x1f,
  60       R_ARM_ALU_PCREL_7_0         = 0x20,
  61       R_ARM_ALU_PCREL_15_8        = 0x21,
  62       R_ARM_ALU_PCREL_23_15       = 0x22,
  63       R_ARM_LDR_SBREL_11_0_NC     = 0x23,
  64       R_ARM_ALU_SBREL_19_12_NC    = 0x24,
  65       R_ARM_ALU_SBREL_27_20_CK    = 0x25,
  66       R_ARM_TARGET1               = 0x26,
  67       R_ARM_SBREL31               = 0x27,
  68       R_ARM_V4BX                  = 0x28,
  69       R_ARM_TARGET2               = 0x29,
  70       R_ARM_PREL31                = 0x2a,
  71       R_ARM_MOVW_ABS_NC           = 0x2b,
  72       R_ARM_MOVT_ABS              = 0x2c,
  73       R_ARM_MOVW_PREL_NC          = 0x2d,
  74       R_ARM_MOVT_PREL             = 0x2e,
  75       R_ARM_THM_MOVW_ABS_NC       = 0x2f,
  76       R_ARM_THM_MOVT_ABS          = 0x30,
  77       R_ARM_THM_MOVW_PREL_NC      = 0x31,
  78       R_ARM_THM_MOVT_PREL         = 0x32,
  79       R_ARM_THM_JUMP19            = 0x33,
  80       R_ARM_THM_JUMP6             = 0x34,
  81       R_ARM_THM_ALU_PREL_11_0     = 0x35,
  82       R_ARM_THM_PC12              = 0x36,
  83       R_ARM_ABS32_NOI             = 0x37,
  84       R_ARM_REL32_NOI             = 0x38,
  85       R_ARM_ALU_PC_G0_NC          = 0x39,
  86       R_ARM_ALU_PC_G0             = 0x3a,
  87       R_ARM_ALU_PC_G1_NC          = 0x3b,
  88       R_ARM_ALU_PC_G1             = 0x3c,
  89       R_ARM_ALU_PC_G2             = 0x3d,
  90       R_ARM_LDR_PC_G1             = 0x3e,
  91       R_ARM_LDR_PC_G2             = 0x3f,
  92       R_ARM_LDRS_PC_G0            = 0x40,
  93       R_ARM_LDRS_PC_G1            = 0x41,
  94       R_ARM_LDRS_PC_G2            = 0x42,
  95       R_ARM_LDC_PC_G0             = 0x43,
  96       R_ARM_LDC_PC_G1             = 0x44,
  97       R_ARM_LDC_PC_G2             = 0x45,
  98       R_ARM_ALU_SB_G0_NC          = 0x46,
  99       R_ARM_ALU_SB_G0             = 0x47,
 100       R_ARM_ALU_SB_G1_NC          = 0x48,
 101       R_ARM_ALU_SB_G1             = 0x49,
 102       R_ARM_ALU_SB_G2             = 0x4a,
 103       R_ARM_LDR_SB_G0             = 0x4b,
 104       R_ARM_LDR_SB_G1             = 0x4c,
 105       R_ARM_LDR_SB_G2             = 0x4d,
 106       R_ARM_LDRS_SB_G0            = 0x4e,
 107       R_ARM_LDRS_SB_G1            = 0x4f,
 108       R_ARM_LDRS_SB_G2            = 0x50,
 109       R_ARM_LDC_SB_G0             = 0x51,
 110       R_ARM_LDC_SB_G1             = 0x52,
 111       R_ARM_LDC_SB_G2             = 0x53,
 112       R_ARM_MOVW_BREL_NC          = 0x54,
 113       R_ARM_MOVT_BREL             = 0x55,
 114       R_ARM_MOVW_BREL             = 0x56,
 115       R_ARM_THM_MOVW_BREL_NC      = 0x57,
 116       R_ARM_THM_MOVT_BREL         = 0x58,
 117       R_ARM_THM_MOVW_BREL         = 0x59,
 118       R_ARM_TLS_GOTDESC           = 0x5a,
 119       R_ARM_TLS_CALL              = 0x5b,
 120       R_ARM_TLS_DESCSEQ           = 0x5c,
 121       R_ARM_THM_TLS_CALL          = 0x5d,
 122       R_ARM_PLT32_ABS             = 0x5e,
 123       R_ARM_GOT_ABS               = 0x5f,
 124       R_ARM_GOT_PREL              = 0x60,
 125       R_ARM_GOT_BREL12            = 0x61,
 126       R_ARM_GOTOFF12              = 0x62,
 127       R_ARM_GOTRELAX              = 0x63,
 128       R_ARM_GNU_VTENTRY           = 0x64,
 129       R_ARM_GNU_VTINHERIT         = 0x65,
 130       R_ARM_THM_JUMP11            = 0x66,
 131       R_ARM_THM_JUMP8             = 0x67,
 132       R_ARM_TLS_GD32              = 0x68,
 133       R_ARM_TLS_LDM32             = 0x69,
 134       R_ARM_TLS_LDO32             = 0x6a,
 135       R_ARM_TLS_IE32              = 0x6b,
 136       R_ARM_TLS_LE32              = 0x6c,
 137       R_ARM_TLS_LDO12             = 0x6d,
 138       R_ARM_TLS_LE12              = 0x6e,
 139       R_ARM_TLS_IE12GP            = 0x6f,
 140       R_ARM_PRIVATE_0             = 0x70,
 141       R_ARM_PRIVATE_1             = 0x71,
 142       R_ARM_PRIVATE_2             = 0x72,
 143       R_ARM_PRIVATE_3             = 0x73,
 144       R_ARM_PRIVATE_4             = 0x74,
 145       R_ARM_PRIVATE_5             = 0x75,
 146       R_ARM_PRIVATE_6             = 0x76,
 147       R_ARM_PRIVATE_7             = 0x77,
 148       R_ARM_PRIVATE_8             = 0x78,
 149       R_ARM_PRIVATE_9             = 0x79,
 150       R_ARM_PRIVATE_10            = 0x7a,
 151       R_ARM_PRIVATE_11            = 0x7b,
 152       R_ARM_PRIVATE_12            = 0x7c,
 153       R_ARM_PRIVATE_13            = 0x7d,
 154       R_ARM_PRIVATE_14            = 0x7e,
 155       R_ARM_PRIVATE_15            = 0x7f,
 156       R_ARM_ME_TOO                = 0x80,
 157       R_ARM_THM_TLS_DESCSEQ16     = 0x81,
 158       R_ARM_THM_TLS_DESCSEQ32     = 0x82
 159     };
 160
 161   public:
 162     ARMELFWriterInfo(TargetMachine &TM);
 163     virtual ~ARMELFWriterInfo();
 164
 165     /// getRelocationType - Returns the target specific ELF Relocation type.
 166     /// 'MachineRelTy' contains the object code independent relocation type
 167     virtual unsigned getRelocationType(unsigned MachineRelTy) const;
 168
 169     /// hasRelocationAddend - True if the target uses an addend in the
 170     /// ELF relocation entry.
 171     virtual bool hasRelocationAddend() const { return false; }
 172
 173     /// getDefaultAddendForRelTy - Gets the default addend value for a
 174     /// relocation entry based on the target ELF relocation type.
 175     virtual long int getDefaultAddendForRelTy(unsigned RelTy,
 176                                               long int Modifier = 0) const;
 177
 178     /// getRelTySize - Returns the size of relocatable field in bits
 179     virtual unsigned getRelocationTySize(unsigned RelTy) const;
 180
 181     /// isPCRelativeRel - True if the relocation type is pc relative
 182     virtual bool isPCRelativeRel(unsigned RelTy) const;
 183
 184     /// getJumpTableRelocationTy - Returns the machine relocation type used
 185     /// to reference a jumptable.
 186     virtual unsigned getAbsoluteLabelMachineRelTy() const;
 187
 188     /// computeRelocation - Some relocatable fields could be relocated
 189     /// directly, avoiding the relocation symbol emission, compute the
 190     /// final relocation value for this symbol.
 191     virtual long int computeRelocation(unsigned SymOffset, unsigned RelOffset,
 192                                        unsigned RelTy) const;
 193   };
 194
 195 } // end llvm namespace
 196
 197 #endif // ARM_ELF_WRITER_INFO_H