| 1 | /* OpenRISC-specific support for 32-bit ELF.
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| 2 | Copyright 2001, 2002 Free Software Foundation, Inc.
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| 3 | Contributed by Johan Rydberg, [email protected]
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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 2 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
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| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 20 |
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| 21 | #include "bfd.h"
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| 22 | #include "sysdep.h"
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| 23 | #include "libbfd.h"
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| 24 | #include "elf-bfd.h"
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| 25 | #include "elf/openrisc.h"
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| 26 | #include "libiberty.h"
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| 27 |
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| 28 | /* Forward declarations. */
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| 29 |
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| 30 | static reloc_howto_type *openrisc_reloc_type_lookup
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| 31 | PARAMS ((bfd * , bfd_reloc_code_real_type));
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| 32 | static void openrisc_info_to_howto_rela
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| 33 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
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| 34 | static bfd_boolean openrisc_elf_relocate_section
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| 35 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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| 36 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
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| 37 | static bfd_reloc_status_type openrisc_final_link_relocate
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| 38 | PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
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| 39 | Elf_Internal_Rela *, bfd_vma));
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| 40 | static bfd_boolean openrisc_elf_gc_sweep_hook
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| 41 | PARAMS ((bfd *, struct bfd_link_info *, asection *,
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| 42 | const Elf_Internal_Rela *));
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| 43 | static asection * openrisc_elf_gc_mark_hook
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| 44 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
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| 45 | struct elf_link_hash_entry *, Elf_Internal_Sym *));
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| 46 | static bfd_boolean openrisc_elf_check_relocs
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| 47 | PARAMS ((bfd *, struct bfd_link_info *, asection *,
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| 48 | const Elf_Internal_Rela *));
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| 49 | static bfd_boolean openrisc_elf_object_p
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| 50 | PARAMS ((bfd *));
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| 51 | static void openrisc_elf_final_write_processing
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| 52 | PARAMS ((bfd *, bfd_boolean));
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| 53 |
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| 54 |
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| 55 | static reloc_howto_type openrisc_elf_howto_table[] =
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| 56 | {
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| 57 | /* This reloc does nothing. */
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| 58 | HOWTO (R_OPENRISC_NONE, /* type */
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| 59 | 0, /* rightshift */
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| 60 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 61 | 32, /* bitsize */
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| 62 | FALSE, /* pc_relative */
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| 63 | 0, /* bitpos */
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| 64 | complain_overflow_bitfield, /* complain_on_overflow */
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| 65 | bfd_elf_generic_reloc, /* special_function */
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| 66 | "R_OPENRISC_NONE", /* name */
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| 67 | FALSE, /* partial_inplace */
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| 68 | 0, /* src_mask */
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| 69 | 0, /* dst_mask */
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| 70 | FALSE), /* pcrel_offset */
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| 71 |
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| 72 | /* A PC relative 26 bit relocation, right shifted by 2. */
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| 73 | HOWTO (R_OPENRISC_INSN_REL_26, /* type */
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| 74 | 2, /* rightshift */
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| 75 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 76 | 26, /* bitsize */
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| 77 | TRUE, /* pc_relative */
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| 78 | 0, /* bitpos */
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| 79 | complain_overflow_signed, /* complain_on_overflow */
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| 80 | bfd_elf_generic_reloc, /* special_function */
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| 81 | "R_OPENRISC_INSN_REL_26", /* name */
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| 82 | FALSE, /* partial_inplace */
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| 83 | 0x00000000, /* src_mask */
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| 84 | 0x03ffffff, /* dst_mask */
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| 85 | FALSE), /* pcrel_offset */
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| 86 |
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| 87 | /* A absolute 26 bit relocation, right shifted by 2. */
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| 88 | HOWTO (R_OPENRISC_INSN_ABS_26, /* type */
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| 89 | 2, /* rightshift */
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| 90 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 91 | 26, /* bitsize */
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| 92 | FALSE, /* pc_relative */
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| 93 | 0, /* bitpos */
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| 94 | complain_overflow_signed, /* complain_on_overflow */
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| 95 | bfd_elf_generic_reloc, /* special_function */
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| 96 | "R_OPENRISC_INSN_ABS_26", /* name */
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| 97 | FALSE, /* partial_inplace */
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| 98 | 0x00000000, /* src_mask */
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| 99 | 0x03ffffff, /* dst_mask */
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| 100 | FALSE), /* pcrel_offset */
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| 101 |
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| 102 | HOWTO (R_OPENRISC_LO_16_IN_INSN, /* type */
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| 103 | 0, /* rightshift */
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| 104 | 1, /* size (0 = byte, 1 = short, 2 = long) */
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| 105 | 16, /* bitsize */
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| 106 | FALSE, /* pc_relative */
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| 107 | 0, /* bitpos */
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| 108 | complain_overflow_dont, /* complain_on_overflow */
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| 109 | bfd_elf_generic_reloc, /* special_function */
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| 110 | "R_OPENRISC_LO_16_IN_INSN", /* name */
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| 111 | FALSE, /* partial_inplace */
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| 112 | 0, /* src_mask */
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| 113 | 0x0000ffff, /* dst_mask */
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| 114 | FALSE), /* pcrel_offset */
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| 115 |
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| 116 | HOWTO (R_OPENRISC_HI_16_IN_INSN, /* type */
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| 117 | 16, /* rightshift */
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| 118 | 1, /* size (0 = byte, 1 = short, 2 = long) */
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| 119 | 16, /* bitsize */
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| 120 | FALSE, /* pc_relative */
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| 121 | 0, /* bitpos */
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| 122 | complain_overflow_dont, /* complain_on_overflow */
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| 123 | bfd_elf_generic_reloc, /* special_function */
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| 124 | "R_OPENRISC_HI_16_IN_INSN", /* name */
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| 125 | FALSE, /* partial_inplace */
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| 126 | 0, /* src_mask */
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| 127 | 0x0000ffff, /* dst_mask */
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| 128 | FALSE), /* pcrel_offset */
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| 129 |
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| 130 | /* An 8 bit absolute relocation. */
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| 131 | HOWTO (R_OPENRISC_8, /* type */
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| 132 | 0, /* rightshift */
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| 133 | 0, /* size (0 = byte, 1 = short, 2 = long) */
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| 134 | 8, /* bitsize */
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| 135 | FALSE, /* pc_relative */
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| 136 | 0, /* bitpos */
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| 137 | complain_overflow_bitfield, /* complain_on_overflow */
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| 138 | bfd_elf_generic_reloc, /* special_function */
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| 139 | "R_OPENRISC_8", /* name */
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| 140 | TRUE, /* partial_inplace */
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| 141 | 0x0000, /* src_mask */
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| 142 | 0x00ff, /* dst_mask */
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| 143 | FALSE), /* pcrel_offset */
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| 144 |
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| 145 | /* A 16 bit absolute relocation. */
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| 146 | HOWTO (R_OPENRISC_16, /* type */
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| 147 | 0, /* rightshift */
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| 148 | 1, /* size (0 = byte, 1 = short, 2 = long) */
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| 149 | 16, /* bitsize */
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| 150 | FALSE, /* pc_relative */
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| 151 | 0, /* bitpos */
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| 152 | complain_overflow_bitfield, /* complain_on_overflow */
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| 153 | bfd_elf_generic_reloc, /* special_function */
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| 154 | "R_OPENRISC_16", /* name */
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| 155 | TRUE, /* partial_inplace */
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| 156 | 0x00000000, /* src_mask */
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| 157 | 0x0000ffff, /* dst_mask */
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| 158 | FALSE), /* pcrel_offset */
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| 159 |
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| 160 | /* A 32 bit absolute relocation. */
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| 161 | HOWTO (R_OPENRISC_32, /* type */
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| 162 | 0, /* rightshift */
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| 163 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 164 | 32, /* bitsize */
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| 165 | FALSE, /* pc_relative */
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| 166 | 0, /* bitpos */
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| 167 | complain_overflow_bitfield, /* complain_on_overflow */
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| 168 | bfd_elf_generic_reloc, /* special_function */
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| 169 | "R_OPENRISC_32", /* name */
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| 170 | TRUE, /* partial_inplace */
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| 171 | 0x00000000, /* src_mask */
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| 172 | 0xffffffff, /* dst_mask */
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| 173 | FALSE), /* pcrel_offset */
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| 174 |
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| 175 | /* GNU extension to record C++ vtable hierarchy */
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| 176 | HOWTO (R_OPENRISC_GNU_VTINHERIT, /* type */
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| 177 | 0, /* rightshift */
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| 178 | 2, /* size (0 = byte, 1 = short, 2 = long) */
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| 179 | 0, /* bitsize */
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| 180 | FALSE, /* pc_relative */
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| 181 | 0, /* bitpos */
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| 182 | complain_overflow_dont, /* complain_on_overflow */
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| 183 | NULL, /* special_function */
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