| 1 | /* 32-bit ELF support for ARM old abi option.
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| 2 | Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
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| 3 |
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| 4 | This file is part of BFD, the Binary File Descriptor library.
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| 5 |
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| 6 | This program is free software; you can redistribute it and/or modify
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| 7 | it under the terms of the GNU General Public License as published by
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| 8 | the Free Software Foundation; either version 2 of the License, or
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| 9 | (at your option) any later version.
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| 10 |
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| 11 | This program is distributed in the hope that it will be useful,
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | GNU General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License
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| 17 | along with this program; if not, write to the Free Software
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| 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 19 |
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| 20 | #define OLD_ARM_ABI
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| 21 |
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| 22 | #include "elf/arm.h"
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| 23 | #include "bfd.h"
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| 24 | #include "sysdep.h"
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| 25 | #include "libbfd.h"
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| 26 | #include "elf-bfd.h"
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| 27 |
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| 28 | #ifndef NUM_ELEM
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| 29 | #define NUM_ELEM(a) (sizeof (a) / sizeof (a)[0])
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| 30 | #endif
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| 31 |
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| 32 | #define USE_RELA
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| 33 |
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| 34 | #define TARGET_LITTLE_SYM bfd_elf32_littlearm_oabi_vec
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| 35 | #define TARGET_LITTLE_NAME "elf32-littlearm-oabi"
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| 36 | #define TARGET_BIG_SYM bfd_elf32_bigarm_oabi_vec
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| 37 | #define TARGET_BIG_NAME "elf32-bigarm-oabi"
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| 38 |
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| 39 | #define elf_info_to_howto elf32_arm_info_to_howto
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| 40 | #define elf_info_to_howto_rel 0
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| 41 |
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| 42 | #define ARM_ELF_ABI_VERSION 0
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| 43 | #define ARM_ELF_OS_ABI_VERSION 0
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| 44 |
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| 45 | static reloc_howto_type elf32_arm_howto_table[] =
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| 46 | {
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| 47 | /* No relocation */
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| 48 | HOWTO (R_ARM_NONE, /* type */
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| 49 | 0, /* rightshift */
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| 50 | 0, /* size (0 = byte, 1 = short, 2 = long) */
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| 51 | 0, /* bitsize */
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| 52 | false, /* pc_relative */
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| 53 | 0, /* bitpos */
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| 54 | complain_overflow_dont, /* complain_on_overflow */
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| 55 | bfd_elf_generic_reloc, /* special_function */
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| 56 | "R_ARM_NONE", /* name */
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| 57 | false, /* partial_inplace */
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| 58 | 0, /* src_mask */
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| 59 | 0, /* dst_mask */
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| 60 | false), /* pcrel_offset */
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| 61 |
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| 62 | HOWTO (R_ARM_PC24, /* type */
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| 63 | 2, /* rightshift */
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| 64 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 65 | 24, /* bitsize */
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| 66 | true, /* pc_relative */
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| 67 | 0, /* bitpos */
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| 68 | complain_overflow_signed, /* complain_on_overflow */
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| 69 | bfd_elf_generic_reloc, /* special_function */
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| 70 | "R_ARM_PC24", /* name */
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| 71 | false, /* partial_inplace */
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| 72 | 0x00ffffff, /* src_mask */
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| 73 | 0x00ffffff, /* dst_mask */
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| 74 | true), /* pcrel_offset */
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| 75 |
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| 76 | /* 32 bit absolute */
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| 77 | HOWTO (R_ARM_ABS32, /* type */
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| 78 | 0, /* rightshift */
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| 79 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 80 | 32, /* bitsize */
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| 81 | false, /* pc_relative */
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| 82 | 0, /* bitpos */
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| 83 | complain_overflow_bitfield, /* complain_on_overflow */
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| 84 | bfd_elf_generic_reloc, /* special_function */
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| 85 | "R_ARM_ABS32", /* name */
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| 86 | false, /* partial_inplace */
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| 87 | 0xffffffff, /* src_mask */
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| 88 | 0xffffffff, /* dst_mask */
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| 89 | false), /* pcrel_offset */
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| 90 |
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| 91 | /* standard 32bit pc-relative reloc */
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| 92 | HOWTO (R_ARM_REL32, /* type */
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| 93 | 0, /* rightshift */
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| 94 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 95 | 32, /* bitsize */
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| 96 | true, /* pc_relative */
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| 97 | 0, /* bitpos */
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| 98 | complain_overflow_bitfield, /* complain_on_overflow */
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| 99 | bfd_elf_generic_reloc, /* special_function */
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| 100 | "R_ARM_REL32", /* name */
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| 101 | false, /* partial_inplace */
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| 102 | 0xffffffff, /* src_mask */
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| 103 | 0xffffffff, /* dst_mask */
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| 104 | true), /* pcrel_offset */
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| 105 |
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| 106 | /* 8 bit absolute */
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| 107 | HOWTO (R_ARM_ABS8, /* type */
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| 108 | 0, /* rightshift */
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| 109 | 0, /* size (0 = byte, 1 = short, 2 = long) */
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| 110 | 8, /* bitsize */
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| 111 | false, /* pc_relative */
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| 112 | 0, /* bitpos */
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| 113 | complain_overflow_bitfield, /* complain_on_overflow */
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| 114 | bfd_elf_generic_reloc, /* special_function */
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| 115 | "R_ARM_ABS8", /* name */
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| 116 | false, /* partial_inplace */
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| 117 | 0x000000ff, /* src_mask */
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| 118 | 0x000000ff, /* dst_mask */
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| 119 | false), /* pcrel_offset */
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| 120 |
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| 121 | /* 16 bit absolute */
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| 122 | HOWTO (R_ARM_ABS16, /* type */
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| 123 | 0, /* rightshift */
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| 124 | 1, /* size (0 = byte, 1 = short, 2 = long) */
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| 125 | 16, /* bitsize */
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| 126 | false, /* pc_relative */
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| 127 | 0, /* bitpos */
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| 128 | complain_overflow_bitfield, /* complain_on_overflow */
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| 129 | bfd_elf_generic_reloc, /* special_function */
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| 130 | "R_ARM_ABS16", /* name */
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| 131 | false, /* partial_inplace */
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| 132 | 0, /* src_mask */
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| 133 | 0, /* dst_mask */
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| 134 | false), /* pcrel_offset */
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| 135 |
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| 136 | /* 12 bit absolute */
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| 137 | HOWTO (R_ARM_ABS12, /* type */
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| 138 | 0, /* rightshift */
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| 139 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 140 | 12, /* bitsize */
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| 141 | false, /* pc_relative */
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| 142 | 0, /* bitpos */
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| 143 | complain_overflow_bitfield, /* complain_on_overflow */
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| 144 | bfd_elf_generic_reloc, /* special_function */
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| 145 | "R_ARM_ABS12", /* name */
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| 146 | false, /* partial_inplace */
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| 147 | 0x000008ff, /* src_mask */
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| 148 | 0x000008ff, /* dst_mask */
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| 149 | false), /* pcrel_offset */
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| 150 |
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| 151 | HOWTO (R_ARM_THM_ABS5, /* type */
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| 152 | 6, /* rightshift */
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| 153 | 1, /* size (0 = byte, 1 = short, 2 = long) */
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| 154 | 5, /* bitsize */
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| 155 | false, /* pc_relative */
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| 156 | 0, /* bitpos */
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| 157 | complain_overflow_bitfield, /* complain_on_overflow */
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| 158 | bfd_elf_generic_reloc, /* special_function */
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| 159 | "R_ARM_THM_ABS5", /* name */
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| 160 | false, /* partial_inplace */
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| 161 | 0x000007e0, /* src_mask */
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| 162 | 0x000007e0, /* dst_mask */
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| 163 | false), /* pcrel_offset */
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| 164 |
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| 165 | HOWTO (R_ARM_THM_PC22, /* type */
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| 166 | 1, /* rightshift */
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| 167 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 168 | 23, /* bitsize */
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| 169 | true, /* pc_relative */
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| 170 | 0, /* bitpos */
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| 171 | complain_overflow_signed, /* complain_on_overflow */
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| 172 | bfd_elf_generic_reloc, /* special_function */
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| 173 | "R_ARM_THM_PC22", /* name */
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| 174 | false, /* partial_inplace */
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| 175 | 0x07ff07ff, /* src_mask */
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| 176 | 0x07ff07ff, /* dst_mask */
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| 177 | true), /* pcrel_offset */
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| 178 |
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| 179 | HOWTO (R_ARM_SBREL32, /* type */
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| 180 | 0, /* rightshift */
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| 181 | 0, /* size (0 = byte, 1 = short, 2 = long) */
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| 182 | 0, /* bitsize */
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| 183 | false, /* pc_relative */
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| 184 | 0, /* bitpos */
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| 185 | complain_overflow_dont,/* complain_on_overflow */
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| 186 | bfd_elf_generic_reloc, /* special_function */
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| 187 | "R_ARM_SBREL32", /* name */
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| 188 | false, /* partial_inplace */
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| 189 | 0, /* src_mask */
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| 190 | 0, /* dst_mask */
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| 191 | false), /* pcrel_offset */
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| 192 |
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| 193 | HOWTO (R_ARM_AMP_VCALL9, /* type */
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| 194 | 1, /* rightshift */
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| 195 | 1, /* size (0 = byte, 1 = short, 2 = long) */
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| 196 | 8, /* bitsize */
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| 197 | true, /* pc_relative */
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| 198 | 0, /* bitpos */
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| 199 | complain_overflow_signed, /* complain_on_overflow */
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| 200 | bfd_elf_generic_reloc, /* special_function */
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| 201 | "R_ARM_AMP_VCALL9", /* name */
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| 202 | false, /* partial_inplace */
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| 203 | 0x000000ff, /* src_mask */
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| 204 | 0x000000ff, /* dst_mask */
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| 205 | true), /* pcrel_offset */
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| 206 |
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| 207 | /* 12 bit pc relative */
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| 208 | HOWTO (R_ARM_THM_PC11, /* type */
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| 209 | 1, /* rightshift */
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| 210 | 1, /* size (0 = byte, 1 = short, 2 = long) */
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| 211 | 11, /* bitsize */
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| 212 | true, /* pc_relative */
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| 213 | 0, /* bitpos */
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| 214 | complain_overflow_signed, /* complain_on_overflow */
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| 215 | bfd_elf_generic_reloc, /* special_function */
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| 216 | "R_ARM_THM_PC11", /* name */
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| 217 | false, /* partial_inplace */
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| 218 | 0x000007ff, /* src_mask */
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| 219 | 0x000007ff, /* dst_mask */
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| 220 | true), /* pcrel_offset */
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| 221 |
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| 222 | /* 12 bit pc relative */
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| 223 | HOWTO (R_ARM_THM_PC9, /* type */
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| 224 | 1, /* rightshift */
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| 225 | 1, /* size (0 = byte, 1 = short, 2 = long) */
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| 226 | 8, /* bitsize */
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| 227 | true, /* pc_relative */
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| 228 | 0, /* bitpos */
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| 229 | complain_overflow_signed, /* complain_on_overflow */
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| 230 | bfd_elf_generic_reloc, /* special_function */
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| 231 | "R_ARM_THM_PC9", /* name */
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| 232 | false, /* partial_inplace */
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| 233 | 0x000000ff, /* src_mask */
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| 234 | 0x000000ff, /* dst_mask */
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| 235 | true), /* pcrel_offset */
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| 236 |
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| 237 | /* GNU extension to record C++ vtable hierarchy */
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| 238 | HOWTO (R_ARM_GNU_VTINHERIT, /* type */
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| 239 | 0, /* rightshift */
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| 240 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 241 | 0, /* bitsize */
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| 242 | false, /* pc_relative */
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| 243 | 0, /* bitpos */
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| 244 | complain_overflow_dont, /* complain_on_overflow */
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| 245 | NULL, /* special_function */
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| 246 | "R_ARM_GNU_VTINHERIT", /* name */
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| 247 | false, /* partial_inplace */
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| 248 | 0, /* src_mask */
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| 249 | 0, /* dst_mask */
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| 250 | false), /* pcrel_offset */
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| 251 |
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| 252 | /* GNU extension to record C++ vtable member usage */
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| 253 | HOWTO (R_ARM_GNU_VTENTRY, /* type */
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| 254 | 0, /* rightshift */
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| 255 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 256 | 0, /* bitsize */
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| 257 | false, /* pc_relative */
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| 258 | 0, /* bitpos */
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| 259 | complain_overflow_dont, /* complain_on_overflow */
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| 260 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */
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| 261 | "R_ARM_GNU_VTENTRY", /* name */
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| 262 | false, /* partial_inplace */
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| 263 | 0, /* src_mask */
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| 264 | 0, /* dst_mask */
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| 265 | false), /* pcrel_offset */
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| 266 |
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| 267 | /* XXX - gap in index numbering here. */
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| 268 |
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| 269 | HOWTO (R_ARM_PLT32, /* type */
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| 270 | 2, /* rightshift */
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| 271 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 272 | 26, /* bitsize */
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| 273 | true, /* pc_relative */
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| 274 | 0, /* bitpos */
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| 275 | complain_overflow_bitfield,/* complain_on_overflow */
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| 276 | bfd_elf_generic_reloc, /* special_function */
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| 277 | "R_ARM_PLT32", /* name */
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| 278 | true, /* partial_inplace */
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| 279 | 0x00ffffff, /* src_mask */
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| 280 | 0x00ffffff, /* dst_mask */
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| 281 | true), /* pcrel_offset */
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| 282 |
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| 283 | /* XXX - gap in index numbering here. */
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| 284 |
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| 285 | HOWTO (R_ARM_RREL32, /* type */
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| 286 | 0, /* rightshift */
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| 287 | 0, /* size (0 = byte, 1 = short, 2 = long) */
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| 288 | 0, /* bitsize */
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| 289 | false, /* pc_relative */
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| 290 | 0, /* bitpos */
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| 291 | complain_overflow_dont, /* complain_on_overflow */
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| 292 | bfd_elf_generic_reloc, /* special_function */
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| 293 | "R_ARM_RREL32", /* name */
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| 294 | false, /* partial_inplace */
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| 295 | 0, /* src_mask */
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| 296 | 0, /* dst_mask */
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| 297 | false), /* pcrel_offset */
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| 298 |
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| 299 | HOWTO (R_ARM_RABS32, /* type */
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| 300 | 0, /* rightshift */
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| 301 | 0, /* size (0 = byte, 1 = short, 2 = long) */
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| 302 | 0, /* bitsize */
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| 303 | false, /* pc_relative */
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| 304 | 0, /* bitpos */
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| 305 | complain_overflow_dont, /* complain_on_overflow */
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| 306 | bfd_elf_generic_reloc, /* special_function */
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| 307 | "R_ARM_RABS32", /* name */
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| 308 | false, /* partial_inplace */
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| 309 | 0, /* src_mask */
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| 310 | 0, /* dst_mask */
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| 311 | false), /* pcrel_offset */
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| 312 |
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| 313 | HOWTO (R_ARM_RPC24, /* type */
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| 314 | 0, /* rightshift */
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| 315 | 0, /* size (0 = byte, 1 = short, 2 = long) */
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| 316 | 0, /* bitsize */
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| 317 | false, /* pc_relative */
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| 318 | 0, /* bitpos */
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| 319 | complain_overflow_dont, /* complain_on_overflow */
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| 320 | bfd_elf_generic_reloc, /* special_function */
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| 321 | "R_ARM_RPC24", /* name */
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| 322 | false, /* partial_inplace */
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| 323 | 0, /* src_mask */
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| 324 | 0, /* dst_mask */
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| 325 | false), /* pcrel_offset */
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| 326 |
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| 327 | HOWTO (R_ARM_RBASE, /* type */
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| 328 | 0, /* rightshift */
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| 329 | 0, /* size (0 = byte, 1 = short, 2 = long) */
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| 330 | 0, /* bitsize */
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| 331 | false, /* pc_relative */
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| 332 | 0, /* bitpos */
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| 333 | complain_overflow_dont, /* complain_on_overflow */
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| 334 | bfd_elf_generic_reloc, /* special_function */
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| 335 | "R_ARM_RBASE", /* name */
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| 336 | false, /* partial_inplace */
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| 337 | 0, /* src_mask */
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| 338 | 0, /* dst_mask */
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| 339 | false) /* pcrel_offset */
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| 340 | };
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| 341 |
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| 342 | /* Locate a reloc in the howto table. This function must be used
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| 343 | when the entry number is is > R_ARM_GNU_VTINHERIT. */
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| 344 | static reloc_howto_type *
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| 345 | find_howto (r_type)
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| 346 | unsigned int r_type;
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| 347 | {
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| 348 | int i;
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| 349 |
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| 350 | for (i = NUM_ELEM (elf32_arm_howto_table); i--;)
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| 351 | if (elf32_arm_howto_table [i].type == r_type)
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| 352 | return elf32_arm_howto_table + i;
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| 353 |
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| 354 | return NULL;
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| 355 | }
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| 356 |
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| 357 | static void
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| 358 | elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc)
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| 359 | bfd *abfd ATTRIBUTE_UNUSED;
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| 360 | arelent *bfd_reloc;
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| 361 | Elf32_Internal_Rela *elf_reloc;
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| 362 | {
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| 363 | unsigned int r_type;
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| 364 |
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| 365 | r_type = ELF32_R_TYPE (elf_reloc->r_info);
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| 366 |
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| 367 | if (r_type <= R_ARM_GNU_VTINHERIT)
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| 368 | bfd_reloc->howto = & elf32_arm_howto_table[r_type];
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| 369 | else
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| 370 | bfd_reloc->howto = find_howto (r_type);
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| 371 | }
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| 372 |
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| 373 | struct elf32_arm_reloc_map
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| 374 | {
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| 375 | bfd_reloc_code_real_type bfd_reloc_val;
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| 376 | unsigned char elf_reloc_val;
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| 377 | };
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| 378 |
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| 379 | static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] =
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| 380 | {
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| 381 | {BFD_RELOC_NONE, R_ARM_NONE },
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| 382 | {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24 },
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| 383 | {BFD_RELOC_32, R_ARM_ABS32 },
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| 384 | {BFD_RELOC_32_PCREL, R_ARM_REL32 },
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| 385 | {BFD_RELOC_8, R_ARM_ABS8 },
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| 386 | {BFD_RELOC_16, R_ARM_ABS16 },
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| 387 | {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12 },
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| 388 | {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5 },
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| 389 | {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22 },
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| 390 | {BFD_RELOC_NONE, R_ARM_SBREL32 },
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| 391 | {BFD_RELOC_NONE, R_ARM_AMP_VCALL9 },
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| 392 | {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_PC11 },
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| 393 | {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_PC9 },
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| 394 | {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT },
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| 395 | {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY }
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| 396 | };
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| 397 |
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| 398 | static reloc_howto_type *
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| 399 | elf32_arm_reloc_type_lookup (abfd, code)
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| 400 | bfd * abfd ATTRIBUTE_UNUSED;
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| 401 | bfd_reloc_code_real_type code;
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| 402 | {
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| 403 | unsigned int i;
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| 404 |
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| 405 | for (i = NUM_ELEM (elf32_arm_reloc_map); i--;)
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| 406 | if (elf32_arm_reloc_map[i].bfd_reloc_val == code)
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| 407 | return & elf32_arm_howto_table [elf32_arm_reloc_map[i].elf_reloc_val];
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| 408 |
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| 409 | if (code == BFD_RELOC_ARM_PLT32)
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| 410 | return find_howto (R_ARM_PLT32);
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| 411 |
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| 412 | return NULL;
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| 413 | }
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| 414 |
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| 415 | #define bfd_elf32_arm_allocate_interworking_sections \
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| 416 | bfd_elf32_arm_oabi_allocate_interworking_sections
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| 417 | #define bfd_elf32_arm_get_bfd_for_interworking \
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| 418 | bfd_elf32_arm_oabi_get_bfd_for_interworking
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| 419 | #define bfd_elf32_arm_process_before_allocation \
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| 420 | bfd_elf32_arm_oabi_process_before_allocation
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| 421 |
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| 422 | #include "elf32-arm.h"
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