1 | /* ARM ELF support for BFD. |
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2 | Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2009, 2010 |
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3 | Free Software Foundation, Inc. |
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4 | |
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5 | This file is part of BFD, the Binary File Descriptor library. |
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6 | |
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7 | This program is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation; either version 3 of the License, or |
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10 | (at your option) any later version. |
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11 | |
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12 | This program is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | GNU General Public License for more details. |
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16 | |
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17 | You should have received a copy of the GNU General Public License |
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18 | along with this program; if not, write to the Free Software Foundation, |
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19 | Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
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20 | |
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21 | #ifndef _ELF_ARM_H |
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22 | #define _ELF_ARM_H |
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23 | |
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24 | #include "elf/reloc-macros.h" |
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25 | |
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26 | /* Processor specific flags for the ELF header e_flags field. */ |
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27 | #define EF_ARM_RELEXEC 0x01 |
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28 | #define EF_ARM_HASENTRY 0x02 |
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29 | #define EF_ARM_INTERWORK 0x04 |
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30 | #define EF_ARM_APCS_26 0x08 |
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31 | #define EF_ARM_APCS_FLOAT 0x10 |
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32 | #define EF_ARM_PIC 0x20 |
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33 | #define EF_ARM_ALIGN8 0x40 /* 8-bit structure alignment is in use. */ |
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34 | #define EF_ARM_NEW_ABI 0x80 |
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35 | #define EF_ARM_OLD_ABI 0x100 |
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36 | #define EF_ARM_SOFT_FLOAT 0x200 |
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37 | #define EF_ARM_VFP_FLOAT 0x400 |
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38 | #define EF_ARM_MAVERICK_FLOAT 0x800 |
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39 | |
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40 | /* Frame unwind information */ |
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41 | #define PT_ARM_EXIDX (PT_LOPROC + 1) |
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42 | |
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43 | /* Other constants defined in the ARM ELF spec. version B-01. */ |
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44 | #define EF_ARM_SYMSARESORTED 0x04 /* NB conflicts with EF_INTERWORK. */ |
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45 | #define EF_ARM_DYNSYMSUSESEGIDX 0x08 /* NB conflicts with EF_APCS26. */ |
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46 | #define EF_ARM_MAPSYMSFIRST 0x10 /* NB conflicts with EF_APCS_FLOAT. */ |
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47 | #define EF_ARM_EABIMASK 0xFF000000 |
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48 | |
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49 | /* New constants defined in the ARM ELF spec. version XXX. |
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50 | Only valid in conjunction with EF_ARM_EABI_VER5. */ |
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51 | #define EF_ARM_ABI_FLOAT_SOFT 0x200 /* NB conflicts with EF_ARM_SOFT_FLOAT. */ |
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52 | #define EF_ARM_ABI_FLOAT_HARD 0x400 /* NB conflicts with EF_ARM_VFP_FLOAT. */ |
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53 | |
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54 | /* Constants defined in AAELF. */ |
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55 | #define EF_ARM_BE8 0x00800000 |
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56 | #define EF_ARM_LE8 0x00400000 |
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57 | |
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58 | #define EF_ARM_EABI_VERSION(flags) ((flags) & EF_ARM_EABIMASK) |
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59 | #define EF_ARM_EABI_UNKNOWN 0x00000000 |
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60 | #define EF_ARM_EABI_VER1 0x01000000 |
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61 | #define EF_ARM_EABI_VER2 0x02000000 |
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62 | #define EF_ARM_EABI_VER3 0x03000000 |
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63 | #define EF_ARM_EABI_VER4 0x04000000 |
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64 | #define EF_ARM_EABI_VER5 0x05000000 |
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65 | |
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66 | /* Local aliases for some flags to match names used by COFF port. */ |
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67 | #define F_INTERWORK EF_ARM_INTERWORK |
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68 | #define F_APCS26 EF_ARM_APCS_26 |
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69 | #define F_APCS_FLOAT EF_ARM_APCS_FLOAT |
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70 | #define F_PIC EF_ARM_PIC |
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71 | #define F_SOFT_FLOAT EF_ARM_SOFT_FLOAT |
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72 | #define F_VFP_FLOAT EF_ARM_VFP_FLOAT |
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73 | |
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74 | /* Additional symbol types for Thumb. */ |
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75 | #define STT_ARM_TFUNC STT_LOPROC /* A Thumb function. */ |
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76 | #define STT_ARM_16BIT STT_HIPROC /* A Thumb label. */ |
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77 | |
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78 | /* Additional section types. */ |
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79 | #define SHT_ARM_EXIDX 0x70000001 /* Section holds ARM unwind info. */ |
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80 | #define SHT_ARM_PREEMPTMAP 0x70000002 /* Section pre-emption details. */ |
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81 | #define SHT_ARM_ATTRIBUTES 0x70000003 /* Section holds attributes. */ |
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82 | #define SHT_ARM_DEBUGOVERLAY 0x70000004 /* Section holds overlay debug info. */ |
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83 | #define SHT_ARM_OVERLAYSECTION 0x70000005 /* Section holds GDB and overlay integration info. */ |
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84 | |
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85 | /* ARM-specific values for sh_flags. */ |
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86 | #define SHF_ENTRYSECT 0x10000000 /* Section contains an entry point. */ |
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87 | #define SHF_COMDEF 0x80000000 /* Section may be multiply defined in the input to a link step. */ |
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88 | |
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89 | /* ARM-specific program header flags. */ |
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90 | #define PF_ARM_SB 0x10000000 /* Segment contains the location addressed by the static base. */ |
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91 | #define PF_ARM_PI 0x20000000 /* Segment is position-independent. */ |
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92 | #define PF_ARM_ABS 0x40000000 /* Segment must be loaded at its base address. */ |
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93 | |
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94 | /* Values for the Tag_CPU_arch EABI attribute. */ |
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95 | #define TAG_CPU_ARCH_PRE_V4 0 |
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96 | #define TAG_CPU_ARCH_V4 1 |
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97 | #define TAG_CPU_ARCH_V4T 2 |
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98 | #define TAG_CPU_ARCH_V5T 3 |
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99 | #define TAG_CPU_ARCH_V5TE 4 |
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100 | #define TAG_CPU_ARCH_V5TEJ 5 |
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101 | #define TAG_CPU_ARCH_V6 6 |
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102 | #define TAG_CPU_ARCH_V6KZ 7 |
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103 | #define TAG_CPU_ARCH_V6T2 8 |
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104 | #define TAG_CPU_ARCH_V6K 9 |
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105 | #define TAG_CPU_ARCH_V7 10 |
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106 | #define TAG_CPU_ARCH_V6_M 11 |
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107 | #define TAG_CPU_ARCH_V6S_M 12 |
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108 | #define TAG_CPU_ARCH_V7E_M 13 |
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109 | #define TAG_CPU_ARCH_V8 14 |
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110 | #define MAX_TAG_CPU_ARCH 14 |
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111 | /* Pseudo-architecture to allow objects to be compatible with the subset of |
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112 | armv4t and armv6-m. This value should never be stored in object files. */ |
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113 | #define TAG_CPU_ARCH_V4T_PLUS_V6_M (MAX_TAG_CPU_ARCH + 1) |
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114 | |
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115 | /* Relocation types. */ |
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116 | |
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117 | START_RELOC_NUMBERS (elf_arm_reloc_type) |
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118 | /* AAELF official names and numbers. */ |
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119 | RELOC_NUMBER (R_ARM_NONE, 0) |
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120 | RELOC_NUMBER (R_ARM_PC24, 1) /* deprecated */ |
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121 | RELOC_NUMBER (R_ARM_ABS32, 2) |
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122 | RELOC_NUMBER (R_ARM_REL32, 3) |
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123 | RELOC_NUMBER (R_ARM_LDR_PC_G0, 4) |
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124 | RELOC_NUMBER (R_ARM_ABS16, 5) |
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125 | RELOC_NUMBER (R_ARM_ABS12, 6) |
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126 | RELOC_NUMBER (R_ARM_THM_ABS5, 7) |
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127 | RELOC_NUMBER (R_ARM_ABS8, 8) |
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128 | RELOC_NUMBER (R_ARM_SBREL32, 9) |
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129 | RELOC_NUMBER (R_ARM_THM_CALL, 10) |
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130 | RELOC_NUMBER (R_ARM_THM_PC8, 11) |
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131 | RELOC_NUMBER (R_ARM_BREL_ADJ, 12) |
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132 | RELOC_NUMBER (R_ARM_TLS_DESC, 13) |
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133 | RELOC_NUMBER (R_ARM_THM_SWI8, 14) /* obsolete */ |
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134 | RELOC_NUMBER (R_ARM_XPC25, 15) /* obsolete */ |
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135 | RELOC_NUMBER (R_ARM_THM_XPC22, 16) /* obsolete */ |
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136 | RELOC_NUMBER (R_ARM_TLS_DTPMOD32, 17) |
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137 | RELOC_NUMBER (R_ARM_TLS_DTPOFF32, 18) |
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138 | RELOC_NUMBER (R_ARM_TLS_TPOFF32, 19) |
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139 | RELOC_NUMBER (R_ARM_COPY, 20) /* Copy symbol at runtime. */ |
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140 | RELOC_NUMBER (R_ARM_GLOB_DAT, 21) /* Create GOT entry. */ |
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141 | RELOC_NUMBER (R_ARM_JUMP_SLOT, 22) /* Create PLT entry. */ |
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142 | RELOC_NUMBER (R_ARM_RELATIVE, 23) /* Adjust by program base. */ |
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143 | RELOC_NUMBER (R_ARM_GOTOFF32, 24) /* 32 bit offset to GOT. */ |
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144 | RELOC_NUMBER (R_ARM_BASE_PREL, 25) /* 32 bit PC relative offset to GOT. */ |
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145 | RELOC_NUMBER (R_ARM_GOT_BREL, 26) /* 32 bit GOT entry. */ |
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146 | RELOC_NUMBER (R_ARM_PLT32, 27) /* deprecated - 32 bit PLT address. */ |
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147 | RELOC_NUMBER (R_ARM_CALL, 28) |
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148 | RELOC_NUMBER (R_ARM_JUMP24, 29) |
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149 | RELOC_NUMBER (R_ARM_THM_JUMP24, 30) |
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150 | RELOC_NUMBER (R_ARM_BASE_ABS, 31) |
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151 | RELOC_NUMBER (R_ARM_ALU_PCREL7_0, 32) /* obsolete */ |
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152 | RELOC_NUMBER (R_ARM_ALU_PCREL15_8, 33) /* obsolete */ |
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153 | RELOC_NUMBER (R_ARM_ALU_PCREL23_15, 34) /* obsolete */ |
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154 | RELOC_NUMBER (R_ARM_LDR_SBREL_11_0, 35) /* deprecated, should have _NC suffix */ |
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155 | RELOC_NUMBER (R_ARM_ALU_SBREL_19_12, 36) /* deprecated, should have _NC suffix */ |
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156 | RELOC_NUMBER (R_ARM_ALU_SBREL_27_20, 37) /* deprecated, should have _CK suffix */ |
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157 | RELOC_NUMBER (R_ARM_TARGET1, 38) |
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158 | RELOC_NUMBER (R_ARM_SBREL31, 39) /* deprecated */ |
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159 | RELOC_NUMBER (R_ARM_V4BX, 40) |
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160 | RELOC_NUMBER (R_ARM_TARGET2, 41) |
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161 | RELOC_NUMBER (R_ARM_PREL31, 42) |
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162 | RELOC_NUMBER (R_ARM_MOVW_ABS_NC, 43) |
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163 | RELOC_NUMBER (R_ARM_MOVT_ABS, 44) |
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164 | RELOC_NUMBER (R_ARM_MOVW_PREL_NC, 45) |
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165 | RELOC_NUMBER (R_ARM_MOVT_PREL, 46) |
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166 | RELOC_NUMBER (R_ARM_THM_MOVW_ABS_NC, 47) |
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167 | RELOC_NUMBER (R_ARM_THM_MOVT_ABS, 48) |
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168 | RELOC_NUMBER (R_ARM_THM_MOVW_PREL_NC, 49) |
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169 | RELOC_NUMBER (R_ARM_THM_MOVT_PREL, 50) |
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170 | RELOC_NUMBER (R_ARM_THM_JUMP19, 51) |
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171 | RELOC_NUMBER (R_ARM_THM_JUMP6, 52) |
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172 | RELOC_NUMBER (R_ARM_THM_ALU_PREL_11_0, 53) |
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173 | RELOC_NUMBER (R_ARM_THM_PC12, 54) |
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174 | RELOC_NUMBER (R_ARM_ABS32_NOI, 55) |
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175 | RELOC_NUMBER (R_ARM_REL32_NOI, 56) |
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176 | RELOC_NUMBER (R_ARM_ALU_PC_G0_NC, 57) |
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177 | RELOC_NUMBER (R_ARM_ALU_PC_G0, 58) |
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178 | RELOC_NUMBER (R_ARM_ALU_PC_G1_NC, 59) |
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179 | RELOC_NUMBER (R_ARM_ALU_PC_G1, 60) |
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180 | RELOC_NUMBER (R_ARM_ALU_PC_G2, 61) |
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181 | RELOC_NUMBER (R_ARM_LDR_PC_G1, 62) |
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182 | RELOC_NUMBER (R_ARM_LDR_PC_G2, 63) |
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183 | RELOC_NUMBER (R_ARM_LDRS_PC_G0, 64) |
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184 | RELOC_NUMBER (R_ARM_LDRS_PC_G1, 65) |
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185 | RELOC_NUMBER (R_ARM_LDRS_PC_G2, 66) |
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186 | RELOC_NUMBER (R_ARM_LDC_PC_G0, 67) |
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187 | RELOC_NUMBER (R_ARM_LDC_PC_G1, 68) |
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188 | RELOC_NUMBER (R_ARM_LDC_PC_G2, 69) |
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189 | RELOC_NUMBER (R_ARM_ALU_SB_G0_NC, 70) |
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190 | RELOC_NUMBER (R_ARM_ALU_SB_G0, 71) |
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191 | RELOC_NUMBER (R_ARM_ALU_SB_G1_NC, 72) |
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192 | RELOC_NUMBER (R_ARM_ALU_SB_G1, 73) |
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193 | RELOC_NUMBER (R_ARM_ALU_SB_G2, 74) |
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194 | RELOC_NUMBER (R_ARM_LDR_SB_G0, 75) |
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195 | RELOC_NUMBER (R_ARM_LDR_SB_G1, 76) |
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196 | RELOC_NUMBER (R_ARM_LDR_SB_G2, 77) |
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197 | RELOC_NUMBER (R_ARM_LDRS_SB_G0, 78) |
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198 | RELOC_NUMBER (R_ARM_LDRS_SB_G1, 79) |
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199 | RELOC_NUMBER (R_ARM_LDRS_SB_G2, 80) |
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200 | RELOC_NUMBER (R_ARM_LDC_SB_G0, 81) |
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201 | RELOC_NUMBER (R_ARM_LDC_SB_G1, 82) |
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202 | RELOC_NUMBER (R_ARM_LDC_SB_G2, 83) |
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203 | RELOC_NUMBER (R_ARM_MOVW_BREL_NC, 84) |
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204 | RELOC_NUMBER (R_ARM_MOVT_BREL, 85) |
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205 | RELOC_NUMBER (R_ARM_MOVW_BREL, 86) |
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206 | RELOC_NUMBER (R_ARM_THM_MOVW_BREL_NC, 87) |
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207 | RELOC_NUMBER (R_ARM_THM_MOVT_BREL, 88) |
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208 | RELOC_NUMBER (R_ARM_THM_MOVW_BREL, 89) |
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209 | RELOC_NUMBER (R_ARM_TLS_GOTDESC, 90) |
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210 | RELOC_NUMBER (R_ARM_TLS_CALL, 91) |
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211 | RELOC_NUMBER (R_ARM_TLS_DESCSEQ, 92) |
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212 | RELOC_NUMBER (R_ARM_THM_TLS_CALL, 93) |
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213 | RELOC_NUMBER (R_ARM_PLT32_ABS, 94) |
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214 | RELOC_NUMBER (R_ARM_GOT_ABS, 95) |
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215 | RELOC_NUMBER (R_ARM_GOT_PREL, 96) |
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216 | RELOC_NUMBER (R_ARM_GOT_BREL12, 97) |
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217 | RELOC_NUMBER (R_ARM_GOTOFF12, 98) |
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218 | RELOC_NUMBER (R_ARM_GOTRELAX, 99) |
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219 | RELOC_NUMBER (R_ARM_GNU_VTENTRY, 100) /* deprecated - old C++ abi */ |
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220 | RELOC_NUMBER (R_ARM_GNU_VTINHERIT, 101) /* deprecated - old C++ abi */ |
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221 | RELOC_NUMBER (R_ARM_THM_JUMP11, 102) |
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222 | RELOC_NUMBER (R_ARM_THM_JUMP8, 103) |
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223 | RELOC_NUMBER (R_ARM_TLS_GD32, 104) |
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224 | RELOC_NUMBER (R_ARM_TLS_LDM32, 105) |
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225 | RELOC_NUMBER (R_ARM_TLS_LDO32, 106) |
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226 | RELOC_NUMBER (R_ARM_TLS_IE32, 107) |
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227 | RELOC_NUMBER (R_ARM_TLS_LE32, 108) |
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228 | RELOC_NUMBER (R_ARM_TLS_LDO12, 109) |
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229 | RELOC_NUMBER (R_ARM_TLS_LE12, 110) |
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230 | RELOC_NUMBER (R_ARM_TLS_IE12GP, 111) |
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231 | /* 112 - 127 private range */ |
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232 | RELOC_NUMBER (R_ARM_ME_TOO, 128) /* obsolete */ |
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233 | RELOC_NUMBER (R_ARM_THM_TLS_DESCSEQ ,129) |
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234 | |
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235 | RELOC_NUMBER (R_ARM_IRELATIVE, 160) |
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236 | |
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237 | /* Extensions? R=read-only? */ |
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238 | RELOC_NUMBER (R_ARM_RXPC25, 249) |
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239 | RELOC_NUMBER (R_ARM_RSBREL32, 250) |
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240 | RELOC_NUMBER (R_ARM_THM_RPC22, 251) |
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241 | RELOC_NUMBER (R_ARM_RREL32, 252) |
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242 | RELOC_NUMBER (R_ARM_RABS32, 253) |
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243 | RELOC_NUMBER (R_ARM_RPC24, 254) |
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244 | RELOC_NUMBER (R_ARM_RBASE, 255) |
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245 | |
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246 | /* Unofficial names for some of the relocs. */ |
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247 | FAKE_RELOC (R_ARM_GOTOFF, R_ARM_GOTOFF32) /* 32 bit offset to GOT. */ |
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248 | FAKE_RELOC (R_ARM_THM_PC22, R_ARM_THM_CALL) |
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249 | FAKE_RELOC (R_ARM_THM_PC11, R_ARM_THM_JUMP11) |
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250 | FAKE_RELOC (R_ARM_THM_PC9, R_ARM_THM_JUMP8) |
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251 | |
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252 | /* Relocs with both a different name, and (apparently) different meaning in |
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253 | GNU usage. */ |
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254 | FAKE_RELOC (R_ARM_GOTPC, R_ARM_BASE_PREL) /* 32 bit PC relative offset to GOT. */ |
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255 | FAKE_RELOC (R_ARM_GOT32, R_ARM_GOT_BREL) /* 32 bit GOT entry. */ |
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256 | FAKE_RELOC (R_ARM_ROSEGREL32, R_ARM_SBREL31) /* ??? */ |
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257 | FAKE_RELOC (R_ARM_AMP_VCALL9, R_ARM_BREL_ADJ) /* Thumb-something. Not used. */ |
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258 | |
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259 | END_RELOC_NUMBERS (R_ARM_max = 256) |
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260 | |
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261 | #ifdef BFD_ARCH_SIZE |
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262 | /* EABI object attributes. */ |
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263 | |
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264 | enum |
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265 | { |
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266 | /* 0-3 are generic. */ |
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267 | Tag_CPU_raw_name = 4, |
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268 | Tag_CPU_name, |
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269 | Tag_CPU_arch, |
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270 | Tag_CPU_arch_profile, |
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271 | Tag_ARM_ISA_use, |
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272 | Tag_THUMB_ISA_use, |
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273 | Tag_FP_arch, |
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274 | Tag_WMMX_arch, |
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275 | Tag_Advanced_SIMD_arch, |
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276 | Tag_PCS_config, |
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277 | Tag_ABI_PCS_R9_use, |
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278 | Tag_ABI_PCS_RW_data, |
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279 | Tag_ABI_PCS_RO_data, |
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280 | Tag_ABI_PCS_GOT_use, |
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281 | Tag_ABI_PCS_wchar_t, |
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282 | Tag_ABI_FP_rounding, |
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283 | Tag_ABI_FP_denormal, |
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284 | Tag_ABI_FP_exceptions, |
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285 | Tag_ABI_FP_user_exceptions, |
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286 | Tag_ABI_FP_number_model, |
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287 | Tag_ABI_align_needed, |
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288 | Tag_ABI_align_preserved, |
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289 | Tag_ABI_enum_size, |
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290 | Tag_ABI_HardFP_use, |
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291 | Tag_ABI_VFP_args, |
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292 | Tag_ABI_WMMX_args, |
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293 | Tag_ABI_optimization_goals, |
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294 | Tag_ABI_FP_optimization_goals, |
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295 | /* 32 is generic (Tag_compatibility). */ |
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296 | Tag_undefined33 = 33, |
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297 | Tag_CPU_unaligned_access, |
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298 | Tag_undefined35, |
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299 | Tag_FP_HP_extension, |
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300 | Tag_undefined37, |
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301 | Tag_ABI_FP_16bit_format, |
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302 | Tag_undefined39, |
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303 | Tag_undefined40, |
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304 | Tag_undefined41, |
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305 | Tag_MPextension_use, |
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306 | Tag_undefined_43, |
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307 | Tag_DIV_use, |
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308 | Tag_nodefaults = 64, |
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309 | Tag_also_compatible_with, |
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310 | Tag_T2EE_use, |
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311 | Tag_conformance, |
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312 | Tag_Virtualization_use, |
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313 | Tag_undefined69, |
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314 | Tag_MPextension_use_legacy, |
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315 | |
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316 | /* The following tags are legacy names for other tags. */ |
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317 | Tag_VFP_arch = Tag_FP_arch, |
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318 | Tag_ABI_align8_needed = Tag_ABI_align_needed, |
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319 | Tag_ABI_align8_preserved = Tag_ABI_align_preserved, |
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320 | Tag_VFP_HP_extension = Tag_FP_HP_extension |
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321 | }; |
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322 | |
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323 | #endif |
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324 | |
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325 | /* The name of the note section used to identify arm variants. */ |
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326 | #define ARM_NOTE_SECTION ".note.gnu.arm.ident" |
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327 | |
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328 | /* Special section names. */ |
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329 | #define ELF_STRING_ARM_unwind ".ARM.exidx" |
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330 | #define ELF_STRING_ARM_unwind_info ".ARM.extab" |
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331 | #define ELF_STRING_ARM_unwind_once ".gnu.linkonce.armexidx." |
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332 | #define ELF_STRING_ARM_unwind_info_once ".gnu.linkonce.armextab." |
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333 | |
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334 | enum arm_st_branch_type { |
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335 | ST_BRANCH_TO_ARM, |
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336 | ST_BRANCH_TO_THUMB, |
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337 | ST_BRANCH_LONG, |
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338 | ST_BRANCH_UNKNOWN |
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339 | }; |
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340 | |
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341 | #define ARM_SYM_BRANCH_TYPE(SYM) \ |
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342 | ((enum arm_st_branch_type) (SYM)->st_target_internal) |
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343 | |
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344 | #endif /* _ELF_ARM_H */ |
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