| 1 | /* MIPS ELF specific backend routines. |
| 2 | Copyright (C) 2002-2019 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of BFD, the Binary File Descriptor library. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "elf/common.h" |
| 22 | #include "elf/internal.h" |
| 23 | #include "elf/mips.h" |
| 24 | |
| 25 | extern bfd_boolean _bfd_mips_elf_mkobject |
| 26 | (bfd *); |
| 27 | extern bfd_boolean _bfd_mips_elf_new_section_hook |
| 28 | (bfd *, asection *); |
| 29 | extern void _bfd_mips_elf_symbol_processing |
| 30 | (bfd *, asymbol *); |
| 31 | extern unsigned int _bfd_mips_elf_eh_frame_address_size |
| 32 | (bfd *, const asection *); |
| 33 | extern bfd_boolean _bfd_mips_elf_name_local_section_symbols |
| 34 | (bfd *); |
| 35 | extern bfd_boolean _bfd_mips_elf_section_processing |
| 36 | (bfd *, Elf_Internal_Shdr *); |
| 37 | extern bfd_boolean _bfd_mips_elf_section_from_shdr |
| 38 | (bfd *, Elf_Internal_Shdr *, const char *, int); |
| 39 | extern bfd_boolean _bfd_mips_elf_fake_sections |
| 40 | (bfd *, Elf_Internal_Shdr *, asection *); |
| 41 | extern bfd_boolean _bfd_mips_elf_section_from_bfd_section |
| 42 | (bfd *, asection *, int *); |
| 43 | extern bfd_boolean _bfd_mips_elf_add_symbol_hook |
| 44 | (bfd *, struct bfd_link_info *, Elf_Internal_Sym *, |
| 45 | const char **, flagword *, asection **, bfd_vma *); |
| 46 | extern int _bfd_mips_elf_link_output_symbol_hook |
| 47 | (struct bfd_link_info *, const char *, Elf_Internal_Sym *, |
| 48 | asection *, struct elf_link_hash_entry *); |
| 49 | extern bfd_boolean _bfd_mips_elf_create_dynamic_sections |
| 50 | (bfd *, struct bfd_link_info *); |
| 51 | extern bfd_boolean _bfd_mips_elf_check_relocs |
| 52 | (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); |
| 53 | extern bfd_boolean _bfd_mips_elf_adjust_dynamic_symbol |
| 54 | (struct bfd_link_info *, struct elf_link_hash_entry *); |
| 55 | extern bfd_boolean _bfd_mips_elf_always_size_sections |
| 56 | (bfd *, struct bfd_link_info *); |
| 57 | extern bfd_boolean _bfd_mips_elf_size_dynamic_sections |
| 58 | (bfd *, struct bfd_link_info *); |
| 59 | extern bfd_boolean _bfd_mips_elf_relocate_section |
| 60 | (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
| 61 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); |
| 62 | extern bfd_boolean _bfd_mips_elf_finish_dynamic_symbol |
| 63 | (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 64 | Elf_Internal_Sym *); |
| 65 | extern bfd_boolean _bfd_mips_vxworks_finish_dynamic_symbol |
| 66 | (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
| 67 | Elf_Internal_Sym *); |
| 68 | extern bfd_boolean _bfd_mips_elf_finish_dynamic_sections |
| 69 | (bfd *, struct bfd_link_info *); |
| 70 | extern bfd_boolean _bfd_mips_elf_sort_relocs_p |
| 71 | (asection *); |
| 72 | extern void _bfd_mips_final_write_processing |
| 73 | (bfd *); |
| 74 | extern bfd_boolean _bfd_mips_elf_final_write_processing |
| 75 | (bfd *); |
| 76 | extern int _bfd_mips_elf_additional_program_headers |
| 77 | (bfd *, struct bfd_link_info *); |
| 78 | extern bfd_boolean _bfd_mips_elf_modify_segment_map |
| 79 | (bfd *, struct bfd_link_info *); |
| 80 | extern asection * _bfd_mips_elf_gc_mark_hook |
| 81 | (asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
| 82 | struct elf_link_hash_entry *, Elf_Internal_Sym *); |
| 83 | extern void _bfd_mips_elf_copy_indirect_symbol |
| 84 | (struct bfd_link_info *, struct elf_link_hash_entry *, |
| 85 | struct elf_link_hash_entry *); |
| 86 | extern void _bfd_mips_elf_hide_symbol |
| 87 | (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); |
| 88 | extern bfd_boolean _bfd_mips_elf_ignore_discarded_relocs |
| 89 | (asection *); |
| 90 | extern bfd_boolean _bfd_mips_elf_is_target_special_symbol |
| 91 | (bfd *abfd, asymbol *sym); |
| 92 | extern bfd_boolean _bfd_mips_elf_find_nearest_line |
| 93 | (bfd *, asymbol **, asection *, bfd_vma, |
| 94 | const char **, const char **, unsigned int *, unsigned int *); |
| 95 | extern bfd_boolean _bfd_mips_elf_find_inliner_info |
| 96 | (bfd *, const char **, const char **, unsigned int *); |
| 97 | extern bfd_boolean _bfd_mips_elf_set_section_contents |
| 98 | (bfd *, asection *, const void *, file_ptr, bfd_size_type); |
| 99 | extern bfd_byte *_bfd_elf_mips_get_relocated_section_contents |
| 100 | (bfd *, struct bfd_link_info *, struct bfd_link_order *, |
| 101 | bfd_byte *, bfd_boolean, asymbol **); |
| 102 | extern bfd_boolean _bfd_mips_elf_relax_section |
| 103 | (bfd *abfd, asection *sec, struct bfd_link_info *link_info, |
| 104 | bfd_boolean *again); |
| 105 | extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create |
| 106 | (bfd *); |
| 107 | extern struct bfd_link_hash_table *_bfd_mips_vxworks_link_hash_table_create |
| 108 | (bfd *); |
| 109 | extern bfd_boolean _bfd_mips_elf_final_link |
| 110 | (bfd *, struct bfd_link_info *); |
| 111 | extern bfd_boolean _bfd_mips_elf_merge_private_bfd_data |
| 112 | (bfd *, struct bfd_link_info *); |
| 113 | extern bfd_boolean _bfd_mips_elf_set_private_flags |
| 114 | (bfd *, flagword); |
| 115 | extern const char * _bfd_mips_fp_abi_string |
| 116 | (int); |
| 117 | extern bfd_boolean _bfd_mips_elf_print_private_bfd_data |
| 118 | (bfd *, void *); |
| 119 | extern bfd_boolean _bfd_mips_elf_discard_info |
| 120 | (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); |
| 121 | extern bfd_boolean _bfd_mips_elf_write_section |
| 122 | (bfd *, struct bfd_link_info *, asection *, bfd_byte *); |
| 123 | |
| 124 | extern bfd_boolean _bfd_mips_elf_read_ecoff_info |
| 125 | (bfd *, asection *, struct ecoff_debug_info *); |
| 126 | extern void _bfd_mips_elf_reloc_unshuffle |
| 127 | (bfd *, int, bfd_boolean, bfd_byte *); |
| 128 | extern void _bfd_mips_elf_reloc_shuffle |
| 129 | (bfd *, int, bfd_boolean, bfd_byte *); |
| 130 | extern bfd_reloc_status_type _bfd_mips_elf_gprel16_with_gp |
| 131 | (bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma); |
| 132 | extern bfd_reloc_status_type _bfd_mips_elf32_gprel16_reloc |
| 133 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 134 | extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc |
| 135 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 136 | extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc |
| 137 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 138 | extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc |
| 139 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 140 | extern bfd_reloc_status_type _bfd_mips_elf_generic_reloc |
| 141 | (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); |
| 142 | extern unsigned long _bfd_elf_mips_mach |
| 143 | (flagword); |
| 144 | extern bfd_vma _bfd_mips_elf_sign_extend |
| 145 | (bfd_vma, int); |
| 146 | extern void _bfd_mips_elf_merge_symbol_attribute |
| 147 | (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, bfd_boolean); |
| 148 | extern char *_bfd_mips_elf_get_target_dtag (bfd_vma); |
| 149 | extern bfd_boolean _bfd_mips_elf_ignore_undef_symbol |
| 150 | (struct elf_link_hash_entry *); |
| 151 | extern void _bfd_mips_elf_use_plts_and_copy_relocs |
| 152 | (struct bfd_link_info *); |
| 153 | extern void _bfd_mips_elf_linker_flags |
| 154 | (struct bfd_link_info *, bfd_boolean, bfd_boolean, bfd_boolean); |
| 155 | extern void _bfd_mips_elf_compact_branches |
| 156 | (struct bfd_link_info *, bfd_boolean); |
| 157 | extern bfd_boolean _bfd_mips_elf_init_stubs |
| 158 | (struct bfd_link_info *, |
| 159 | asection *(*) (const char *, asection *, asection *)); |
| 160 | extern bfd_vma _bfd_mips_elf_plt_sym_val |
| 161 | (bfd_vma, const asection *, const arelent *rel); |
| 162 | extern long _bfd_mips_elf_get_synthetic_symtab |
| 163 | (bfd *, long, asymbol **, long, asymbol **, asymbol **); |
| 164 | extern bfd_boolean _bfd_mips_elf_gc_mark_extra_sections |
| 165 | (struct bfd_link_info *, elf_gc_mark_hook_fn); |
| 166 | extern void _bfd_mips_post_process_headers |
| 167 | (bfd *abfd, struct bfd_link_info *link_info); |
| 168 | |
| 169 | extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections []; |
| 170 | |
| 171 | extern bfd_boolean _bfd_mips_elf_common_definition (Elf_Internal_Sym *); |
| 172 | |
| 173 | extern int _bfd_mips_elf_compact_eh_encoding (struct bfd_link_info *); |
| 174 | extern int _bfd_mips_elf_cant_unwind_opcode (struct bfd_link_info *); |
| 175 | |
| 176 | extern void _bfd_mips_elf_record_xhash_symbol |
| 177 | (struct elf_link_hash_entry *h, bfd_vma xlat_loc); |
| 178 | |
| 179 | static inline bfd_boolean |
| 180 | gprel16_reloc_p (unsigned int r_type) |
| 181 | { |
| 182 | return (r_type == R_MIPS_GPREL16 |
| 183 | || r_type == R_MIPS16_GPREL |
| 184 | || r_type == R_MICROMIPS_GPREL16 |
| 185 | || r_type == R_MICROMIPS_GPREL7_S2); |
| 186 | } |
| 187 | |
| 188 | static inline bfd_boolean |
| 189 | literal_reloc_p (int r_type) |
| 190 | { |
| 191 | return r_type == R_MIPS_LITERAL || r_type == R_MICROMIPS_LITERAL; |
| 192 | } |
| 193 | |
| 194 | #define elf_backend_common_definition _bfd_mips_elf_common_definition |
| 195 | #define elf_backend_name_local_section_symbols \ |
| 196 | _bfd_mips_elf_name_local_section_symbols |
| 197 | #define elf_backend_special_sections _bfd_mips_elf_special_sections |
| 198 | #define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size |
| 199 | #define elf_backend_merge_symbol_attribute _bfd_mips_elf_merge_symbol_attribute |
| 200 | #define elf_backend_ignore_undef_symbol _bfd_mips_elf_ignore_undef_symbol |
| 201 | #define elf_backend_post_process_headers _bfd_mips_post_process_headers |
| 202 | #define elf_backend_compact_eh_encoding _bfd_mips_elf_compact_eh_encoding |
| 203 | #define elf_backend_cant_unwind_opcode _bfd_mips_elf_cant_unwind_opcode |
| 204 | #define elf_backend_record_xhash_symbol _bfd_mips_elf_record_xhash_symbol |
| 205 | #define elf_backend_always_renumber_dynsyms TRUE |