1/* MIPS ELF specific backend routines. 2 Copyright (C) 2002-2017 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 25extern bfd_boolean _bfd_mips_elf_mkobject 26 (bfd *); 27extern bfd_boolean _bfd_mips_elf_new_section_hook 28 (bfd *, asection *); 29extern void _bfd_mips_elf_symbol_processing 30 (bfd *, asymbol *); 31extern unsigned int _bfd_mips_elf_eh_frame_address_size 32 (bfd *, asection *); 33extern bfd_boolean _bfd_mips_elf_name_local_section_symbols 34 (bfd *); 35extern bfd_boolean _bfd_mips_elf_section_processing 36 (bfd *, Elf_Internal_Shdr *); 37extern bfd_boolean _bfd_mips_elf_section_from_shdr 38 (bfd *, Elf_Internal_Shdr *, const char *, int); 39extern bfd_boolean _bfd_mips_elf_fake_sections 40 (bfd *, Elf_Internal_Shdr *, asection *); 41extern bfd_boolean _bfd_mips_elf_section_from_bfd_section 42 (bfd *, asection *, int *); 43extern bfd_boolean _bfd_mips_elf_add_symbol_hook 44 (bfd *, struct bfd_link_info *, Elf_Internal_Sym *, 45 const char **, flagword *, asection **, bfd_vma *); 46extern 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 *); 49extern bfd_boolean _bfd_mips_elf_create_dynamic_sections 50 (bfd *, struct bfd_link_info *); 51extern bfd_boolean _bfd_mips_elf_check_relocs 52 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 53extern bfd_boolean _bfd_mips_elf_adjust_dynamic_symbol 54 (struct bfd_link_info *, struct elf_link_hash_entry *); 55extern bfd_boolean _bfd_mips_elf_always_size_sections 56 (bfd *, struct bfd_link_info *); 57extern bfd_boolean _bfd_mips_elf_size_dynamic_sections 58 (bfd *, struct bfd_link_info *); 59extern 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 **); 62extern bfd_boolean _bfd_mips_elf_finish_dynamic_symbol 63 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 64 Elf_Internal_Sym *); 65extern bfd_boolean _bfd_mips_vxworks_finish_dynamic_symbol 66 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 67 Elf_Internal_Sym *); 68extern bfd_boolean _bfd_mips_elf_finish_dynamic_sections 69 (bfd *, struct bfd_link_info *); 70extern bfd_boolean _bfd_mips_elf_sort_relocs_p 71 (asection *); 72extern void _bfd_mips_elf_final_write_processing 73 (bfd *, bfd_boolean); 74extern int _bfd_mips_elf_additional_program_headers 75 (bfd *, struct bfd_link_info *); 76extern bfd_boolean _bfd_mips_elf_modify_segment_map 77 (bfd *, struct bfd_link_info *); 78extern asection * _bfd_mips_elf_gc_mark_hook 79 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 80 struct elf_link_hash_entry *, Elf_Internal_Sym *); 81extern bfd_boolean _bfd_mips_elf_gc_sweep_hook 82 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 83extern void _bfd_mips_elf_copy_indirect_symbol 84 (struct bfd_link_info *, struct elf_link_hash_entry *, 85 struct elf_link_hash_entry *); 86extern bfd_boolean _bfd_mips_elf_ignore_discarded_relocs 87 (asection *); 88extern bfd_boolean _bfd_mips_elf_is_target_special_symbol 89 (bfd *abfd, asymbol *sym); 90extern bfd_boolean _bfd_mips_elf_find_nearest_line 91 (bfd *, asymbol **, asection *, bfd_vma, 92 const char **, const char **, unsigned int *, unsigned int *); 93extern bfd_boolean _bfd_mips_elf_find_inliner_info 94 (bfd *, const char **, const char **, unsigned int *); 95extern bfd_boolean _bfd_mips_elf_set_section_contents 96 (bfd *, asection *, const void *, file_ptr, bfd_size_type); 97extern bfd_byte *_bfd_elf_mips_get_relocated_section_contents 98 (bfd *, struct bfd_link_info *, struct bfd_link_order *, 99 bfd_byte *, bfd_boolean, asymbol **); 100extern bfd_boolean _bfd_mips_elf_relax_section 101 (bfd *abfd, asection *sec, struct bfd_link_info *link_info, 102 bfd_boolean *again); 103extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create 104 (bfd *); 105extern struct bfd_link_hash_table *_bfd_mips_vxworks_link_hash_table_create 106 (bfd *); 107extern bfd_boolean _bfd_mips_elf_final_link 108 (bfd *, struct bfd_link_info *); 109extern bfd_boolean _bfd_mips_elf_merge_private_bfd_data 110 (bfd *, struct bfd_link_info *); 111extern bfd_boolean _bfd_mips_elf_set_private_flags 112 (bfd *, flagword); 113extern const char * _bfd_mips_fp_abi_string 114 (int); 115extern bfd_boolean _bfd_mips_elf_print_private_bfd_data 116 (bfd *, void *); 117extern bfd_boolean _bfd_mips_elf_discard_info 118 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 119extern bfd_boolean _bfd_mips_elf_write_section 120 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 121 122extern bfd_boolean _bfd_mips_elf_read_ecoff_info 123 (bfd *, asection *, struct ecoff_debug_info *); 124extern void _bfd_mips_elf_reloc_unshuffle 125 (bfd *, int, bfd_boolean, bfd_byte *); 126extern void _bfd_mips_elf_reloc_shuffle 127 (bfd *, int, bfd_boolean, bfd_byte *); 128extern bfd_reloc_status_type _bfd_mips_elf_gprel16_with_gp 129 (bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma); 130extern bfd_reloc_status_type _bfd_mips_elf32_gprel16_reloc 131 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 132extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc 133 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 134extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc 135 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 136extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc 137 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 138extern bfd_reloc_status_type _bfd_mips_elf_generic_reloc 139 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 140extern unsigned long _bfd_elf_mips_mach 141 (flagword); 142extern bfd_boolean _bfd_mips_relax_section 143 (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); 144extern bfd_vma _bfd_mips_elf_sign_extend 145 (bfd_vma, int); 146extern void _bfd_mips_elf_merge_symbol_attribute 147 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, bfd_boolean); 148extern char *_bfd_mips_elf_get_target_dtag (bfd_vma); 149extern bfd_boolean _bfd_mips_elf_ignore_undef_symbol 150 (struct elf_link_hash_entry *); 151extern void _bfd_mips_elf_use_plts_and_copy_relocs 152 (struct bfd_link_info *); 153extern void _bfd_mips_elf_linker_flags 154 (struct bfd_link_info *, bfd_boolean, bfd_boolean); 155extern bfd_boolean _bfd_mips_elf_init_stubs 156 (struct bfd_link_info *, 157 asection *(*) (const char *, asection *, asection *)); 158extern bfd_vma _bfd_mips_elf_plt_sym_val 159 (bfd_vma, const asection *, const arelent *rel); 160extern long _bfd_mips_elf_get_synthetic_symtab 161 (bfd *, long, asymbol **, long, asymbol **, asymbol **); 162extern bfd_boolean _bfd_mips_elf_gc_mark_extra_sections 163 (struct bfd_link_info *, elf_gc_mark_hook_fn); 164extern void _bfd_mips_post_process_headers 165 (bfd *abfd, struct bfd_link_info *link_info); 166 167extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections []; 168 169extern bfd_boolean _bfd_mips_elf_common_definition (Elf_Internal_Sym *); 170 171extern int _bfd_mips_elf_compact_eh_encoding (struct bfd_link_info *); 172extern int _bfd_mips_elf_cant_unwind_opcode (struct bfd_link_info *); 173 174static inline bfd_boolean 175gprel16_reloc_p (unsigned int r_type) 176{ 177 return (r_type == R_MIPS_GPREL16 178 || r_type == R_MIPS16_GPREL 179 || r_type == R_MICROMIPS_GPREL16 180 || r_type == R_MICROMIPS_GPREL7_S2); 181} 182 183static inline bfd_boolean 184literal_reloc_p (int r_type) 185{ 186 return r_type == R_MIPS_LITERAL || r_type == R_MICROMIPS_LITERAL; 187} 188 189#define elf_backend_common_definition _bfd_mips_elf_common_definition 190#define elf_backend_name_local_section_symbols \ 191 _bfd_mips_elf_name_local_section_symbols 192#define elf_backend_special_sections _bfd_mips_elf_special_sections 193#define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size 194#define elf_backend_merge_symbol_attribute _bfd_mips_elf_merge_symbol_attribute 195#define elf_backend_ignore_undef_symbol _bfd_mips_elf_ignore_undef_symbol 196#define elf_backend_post_process_headers _bfd_mips_post_process_headers 197#define elf_backend_compact_eh_encoding _bfd_mips_elf_compact_eh_encoding 198#define elf_backend_cant_unwind_opcode _bfd_mips_elf_cant_unwind_opcode 199#define elf_backend_always_renumber_dynsyms TRUE 200