1 /* MIPS ELF specific backend routines. 2 Copyright (C) 2002-2022 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 enum reloc_check 26 { 27 check_std, 28 check_inplace, 29 check_shuffle 30 }; 31 32 extern bool _bfd_mips_elf_mkobject 33 (bfd *); 34 extern bool _bfd_mips_elf_close_and_cleanup 35 (bfd *); 36 extern bool _bfd_mips_elf_new_section_hook 37 (bfd *, asection *); 38 extern void _bfd_mips_elf_symbol_processing 39 (bfd *, asymbol *); 40 extern unsigned int _bfd_mips_elf_eh_frame_address_size 41 (bfd *, const asection *); 42 extern bool _bfd_mips_elf_name_local_section_symbols 43 (bfd *); 44 extern bool _bfd_mips_elf_section_processing 45 (bfd *, Elf_Internal_Shdr *); 46 extern bool _bfd_mips_elf_section_from_shdr 47 (bfd *, Elf_Internal_Shdr *, const char *, int); 48 extern bool _bfd_mips_elf_fake_sections 49 (bfd *, Elf_Internal_Shdr *, asection *); 50 extern bool _bfd_mips_elf_section_from_bfd_section 51 (bfd *, asection *, int *); 52 extern bool _bfd_mips_elf_add_symbol_hook 53 (bfd *, struct bfd_link_info *, Elf_Internal_Sym *, 54 const char **, flagword *, asection **, bfd_vma *); 55 extern int _bfd_mips_elf_link_output_symbol_hook 56 (struct bfd_link_info *, const char *, Elf_Internal_Sym *, 57 asection *, struct elf_link_hash_entry *); 58 extern bool _bfd_mips_elf_create_dynamic_sections 59 (bfd *, struct bfd_link_info *); 60 extern bool _bfd_mips_elf_check_relocs 61 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 62 extern bool _bfd_mips_elf_adjust_dynamic_symbol 63 (struct bfd_link_info *, struct elf_link_hash_entry *); 64 extern bool _bfd_mips_elf_always_size_sections 65 (bfd *, struct bfd_link_info *); 66 extern bool _bfd_mips_elf_size_dynamic_sections 67 (bfd *, struct bfd_link_info *); 68 extern int _bfd_mips_elf_relocate_section 69 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, 70 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); 71 extern bool _bfd_mips_elf_finish_dynamic_symbol 72 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 73 Elf_Internal_Sym *); 74 extern bool _bfd_mips_vxworks_finish_dynamic_symbol 75 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 76 Elf_Internal_Sym *); 77 extern bool _bfd_mips_elf_finish_dynamic_sections 78 (bfd *, struct bfd_link_info *); 79 extern bool _bfd_mips_elf_sort_relocs_p 80 (asection *); 81 extern void _bfd_mips_final_write_processing 82 (bfd *); 83 extern bool _bfd_mips_elf_final_write_processing 84 (bfd *); 85 extern int _bfd_mips_elf_additional_program_headers 86 (bfd *, struct bfd_link_info *); 87 extern bool _bfd_mips_elf_modify_segment_map 88 (bfd *, struct bfd_link_info *); 89 extern asection * _bfd_mips_elf_gc_mark_hook 90 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 91 struct elf_link_hash_entry *, Elf_Internal_Sym *); 92 extern void _bfd_mips_elf_copy_indirect_symbol 93 (struct bfd_link_info *, struct elf_link_hash_entry *, 94 struct elf_link_hash_entry *); 95 extern void _bfd_mips_elf_hide_symbol 96 (struct bfd_link_info *, struct elf_link_hash_entry *, bool); 97 extern bool _bfd_mips_elf_ignore_discarded_relocs 98 (asection *); 99 extern bool _bfd_mips_elf_is_target_special_symbol 100 (bfd *abfd, asymbol *sym); 101 extern bool _bfd_mips_elf_find_nearest_line 102 (bfd *, asymbol **, asection *, bfd_vma, 103 const char **, const char **, unsigned int *, unsigned int *); 104 #define _bfd_mips_elf_find_nearest_line_with_alt \ 105 _bfd_nosymbols_find_nearest_line_with_alt 106 extern bool _bfd_mips_elf_find_inliner_info 107 (bfd *, const char **, const char **, unsigned int *); 108 extern bool _bfd_mips_elf_set_section_contents 109 (bfd *, asection *, const void *, file_ptr, bfd_size_type); 110 extern bfd_byte *_bfd_elf_mips_get_relocated_section_contents 111 (bfd *, struct bfd_link_info *, struct bfd_link_order *, 112 bfd_byte *, bool, asymbol **); 113 extern bool _bfd_mips_elf_relax_section 114 (bfd *abfd, asection *sec, struct bfd_link_info *link_info, 115 bool *again); 116 extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create 117 (bfd *); 118 extern struct bfd_link_hash_table *_bfd_mips_vxworks_link_hash_table_create 119 (bfd *); 120 extern bool _bfd_mips_elf_final_link 121 (bfd *, struct bfd_link_info *); 122 extern bool _bfd_mips_elf_merge_private_bfd_data 123 (bfd *, struct bfd_link_info *); 124 extern bool _bfd_mips_elf_set_private_flags 125 (bfd *, flagword); 126 extern const char * _bfd_mips_fp_abi_string 127 (int); 128 extern bool _bfd_mips_elf_print_private_bfd_data 129 (bfd *, void *); 130 extern bool _bfd_mips_elf_discard_info 131 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 132 extern bool _bfd_mips_elf_write_section 133 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 134 135 extern bool _bfd_mips_elf_read_ecoff_info 136 (bfd *, asection *, struct ecoff_debug_info *); 137 extern void _bfd_mips_elf_reloc_unshuffle 138 (bfd *, int, bool, bfd_byte *); 139 extern void _bfd_mips_elf_reloc_shuffle 140 (bfd *, int, bool, bfd_byte *); 141 extern bool _bfd_mips_reloc_offset_in_range 142 (bfd *, asection *, arelent *, enum reloc_check); 143 extern bfd_reloc_status_type _bfd_mips_elf_gprel16_with_gp 144 (bfd *, asymbol *, arelent *, asection *, bool, void *, bfd_vma); 145 extern bfd_reloc_status_type _bfd_mips_elf32_gprel16_reloc 146 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 147 extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc 148 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 149 extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc 150 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 151 extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc 152 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 153 extern bfd_reloc_status_type _bfd_mips_elf_generic_reloc 154 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 155 extern unsigned long _bfd_elf_mips_mach 156 (flagword); 157 extern bfd_vma _bfd_mips_elf_sign_extend 158 (bfd_vma, int); 159 extern void _bfd_mips_elf_merge_symbol_attribute 160 (struct elf_link_hash_entry *, unsigned int, bool, bool); 161 extern char *_bfd_mips_elf_get_target_dtag (bfd_vma); 162 extern bool _bfd_mips_elf_ignore_undef_symbol 163 (struct elf_link_hash_entry *); 164 extern void _bfd_mips_elf_use_plts_and_copy_relocs 165 (struct bfd_link_info *); 166 extern void _bfd_mips_elf_linker_flags 167 (struct bfd_link_info *, bool, bool, bool); 168 extern void _bfd_mips_elf_compact_branches 169 (struct bfd_link_info *, bool); 170 extern bool _bfd_mips_elf_init_stubs 171 (struct bfd_link_info *, 172 asection *(*) (const char *, asection *, asection *)); 173 extern bfd_vma _bfd_mips_elf_plt_sym_val 174 (bfd_vma, const asection *, const arelent *rel); 175 extern long _bfd_mips_elf_get_synthetic_symtab 176 (bfd *, long, asymbol **, long, asymbol **, asymbol **); 177 extern bool _bfd_mips_elf_gc_mark_extra_sections 178 (struct bfd_link_info *, elf_gc_mark_hook_fn); 179 extern bool _bfd_mips_init_file_header 180 (bfd *abfd, struct bfd_link_info *link_info); 181 182 extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections []; 183 184 extern bool _bfd_mips_elf_common_definition (Elf_Internal_Sym *); 185 186 extern int _bfd_mips_elf_compact_eh_encoding (struct bfd_link_info *); 187 extern int _bfd_mips_elf_cant_unwind_opcode (struct bfd_link_info *); 188 189 extern void _bfd_mips_elf_record_xhash_symbol 190 (struct elf_link_hash_entry *h, bfd_vma xlat_loc); 191 192 /* MIPS ABI flags data access. For the disassembler. */ 193 extern struct elf_internal_abiflags_v0 *bfd_mips_elf_get_abiflags (bfd *); 194 195 static inline bool 196 gprel16_reloc_p (unsigned int r_type) 197 { 198 return (r_type == R_MIPS_GPREL16 199 || r_type == R_MIPS16_GPREL 200 || r_type == R_MICROMIPS_GPREL16 201 || r_type == R_MICROMIPS_GPREL7_S2); 202 } 203 204 static inline bool 205 literal_reloc_p (int r_type) 206 { 207 return r_type == R_MIPS_LITERAL || r_type == R_MICROMIPS_LITERAL; 208 } 209 210 #define elf_backend_common_definition _bfd_mips_elf_common_definition 211 #define elf_backend_name_local_section_symbols \ 212 _bfd_mips_elf_name_local_section_symbols 213 #define elf_backend_special_sections _bfd_mips_elf_special_sections 214 #define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size 215 #define elf_backend_merge_symbol_attribute _bfd_mips_elf_merge_symbol_attribute 216 #define elf_backend_ignore_undef_symbol _bfd_mips_elf_ignore_undef_symbol 217 #define elf_backend_init_file_header _bfd_mips_init_file_header 218 #define elf_backend_compact_eh_encoding _bfd_mips_elf_compact_eh_encoding 219 #define elf_backend_cant_unwind_opcode _bfd_mips_elf_cant_unwind_opcode 220 #define elf_backend_record_xhash_symbol _bfd_mips_elf_record_xhash_symbol 221 #define elf_backend_always_renumber_dynsyms true 222