1 /* MIPS ELF specific backend routines. 2 Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 3 Free Software Foundation, Inc. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 20 MA 02110-1301, USA. */ 21 22 #include "elf/common.h" 23 #include "elf/internal.h" 24 #include "elf/mips.h" 25 26 extern bfd_boolean _bfd_mips_elf_mkobject 27 (bfd *); 28 extern bfd_boolean _bfd_mips_elf_new_section_hook 29 (bfd *, asection *); 30 extern void _bfd_mips_elf_symbol_processing 31 (bfd *, asymbol *); 32 extern unsigned int _bfd_mips_elf_eh_frame_address_size 33 (bfd *, asection *); 34 extern bfd_boolean _bfd_mips_elf_name_local_section_symbols 35 (bfd *); 36 extern bfd_boolean _bfd_mips_elf_section_processing 37 (bfd *, Elf_Internal_Shdr *); 38 extern bfd_boolean _bfd_mips_elf_section_from_shdr 39 (bfd *, Elf_Internal_Shdr *, const char *, int); 40 extern bfd_boolean _bfd_mips_elf_fake_sections 41 (bfd *, Elf_Internal_Shdr *, asection *); 42 extern bfd_boolean _bfd_mips_elf_section_from_bfd_section 43 (bfd *, asection *, int *); 44 extern bfd_boolean _bfd_mips_elf_add_symbol_hook 45 (bfd *, struct bfd_link_info *, Elf_Internal_Sym *, 46 const char **, flagword *, asection **, bfd_vma *); 47 extern int _bfd_mips_elf_link_output_symbol_hook 48 (struct bfd_link_info *, const char *, Elf_Internal_Sym *, 49 asection *, struct elf_link_hash_entry *); 50 extern bfd_boolean _bfd_mips_elf_create_dynamic_sections 51 (bfd *, struct bfd_link_info *); 52 extern bfd_boolean _bfd_mips_elf_check_relocs 53 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 54 extern bfd_boolean _bfd_mips_elf_adjust_dynamic_symbol 55 (struct bfd_link_info *, struct elf_link_hash_entry *); 56 extern bfd_boolean _bfd_mips_elf_always_size_sections 57 (bfd *, struct bfd_link_info *); 58 extern bfd_boolean _bfd_mips_elf_size_dynamic_sections 59 (bfd *, struct bfd_link_info *); 60 extern bfd_boolean _bfd_mips_elf_relocate_section 61 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, 62 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); 63 extern bfd_boolean _bfd_mips_elf_finish_dynamic_symbol 64 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 65 Elf_Internal_Sym *); 66 extern bfd_boolean _bfd_mips_vxworks_finish_dynamic_symbol 67 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 68 Elf_Internal_Sym *); 69 extern bfd_boolean _bfd_mips_elf_finish_dynamic_sections 70 (bfd *, struct bfd_link_info *); 71 extern void _bfd_mips_elf_final_write_processing 72 (bfd *, bfd_boolean); 73 extern int _bfd_mips_elf_additional_program_headers 74 (bfd *, struct bfd_link_info *); 75 extern bfd_boolean _bfd_mips_elf_modify_segment_map 76 (bfd *, struct bfd_link_info *); 77 extern asection * _bfd_mips_elf_gc_mark_hook 78 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 79 struct elf_link_hash_entry *, Elf_Internal_Sym *); 80 extern bfd_boolean _bfd_mips_elf_gc_sweep_hook 81 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 82 extern void _bfd_mips_elf_copy_indirect_symbol 83 (struct bfd_link_info *, struct elf_link_hash_entry *, 84 struct elf_link_hash_entry *); 85 extern bfd_boolean _bfd_mips_elf_ignore_discarded_relocs 86 (asection *); 87 extern bfd_boolean _bfd_mips_elf_is_target_special_symbol 88 (bfd *abfd, asymbol *sym); 89 extern bfd_boolean _bfd_mips_elf_find_nearest_line 90 (bfd *, asection *, asymbol **, bfd_vma, const char **, 91 const char **, unsigned int *); 92 extern bfd_boolean _bfd_mips_elf_find_inliner_info 93 (bfd *, const char **, const char **, unsigned int *); 94 extern bfd_boolean _bfd_mips_elf_set_section_contents 95 (bfd *, asection *, const void *, file_ptr, bfd_size_type); 96 extern bfd_byte *_bfd_elf_mips_get_relocated_section_contents 97 (bfd *, struct bfd_link_info *, struct bfd_link_order *, 98 bfd_byte *, bfd_boolean, asymbol **); 99 extern bfd_boolean _bfd_mips_elf_relax_section 100 (bfd *abfd, asection *sec, struct bfd_link_info *link_info, 101 bfd_boolean *again); 102 extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create 103 (bfd *); 104 extern struct bfd_link_hash_table *_bfd_mips_vxworks_link_hash_table_create 105 (bfd *); 106 extern bfd_boolean _bfd_mips_elf_final_link 107 (bfd *, struct bfd_link_info *); 108 extern bfd_boolean _bfd_mips_elf_merge_private_bfd_data 109 (bfd *, bfd *); 110 extern bfd_boolean _bfd_mips_elf_set_private_flags 111 (bfd *, flagword); 112 extern bfd_boolean _bfd_mips_elf_print_private_bfd_data 113 (bfd *, void *); 114 extern bfd_boolean _bfd_mips_elf_discard_info 115 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 116 extern bfd_boolean _bfd_mips_elf_write_section 117 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 118 119 extern bfd_boolean _bfd_mips_elf_read_ecoff_info 120 (bfd *, asection *, struct ecoff_debug_info *); 121 extern void _bfd_mips_elf_reloc_unshuffle 122 (bfd *, int, bfd_boolean, bfd_byte *); 123 extern void _bfd_mips_elf_reloc_shuffle 124 (bfd *, int, bfd_boolean, bfd_byte *); 125 extern bfd_reloc_status_type _bfd_mips_elf_gprel16_with_gp 126 (bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma); 127 extern bfd_reloc_status_type _bfd_mips_elf32_gprel16_reloc 128 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 129 extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc 130 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 131 extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc 132 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 133 extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc 134 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 135 extern bfd_reloc_status_type _bfd_mips_elf_generic_reloc 136 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 137 extern unsigned long _bfd_elf_mips_mach 138 (flagword); 139 extern bfd_boolean _bfd_mips_relax_section 140 (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); 141 extern bfd_vma _bfd_mips_elf_sign_extend 142 (bfd_vma, int); 143 extern void _bfd_mips_elf_merge_symbol_attribute 144 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, bfd_boolean); 145 extern char *_bfd_mips_elf_get_target_dtag (bfd_vma); 146 extern bfd_boolean _bfd_mips_elf_ignore_undef_symbol 147 (struct elf_link_hash_entry *); 148 extern void _bfd_mips_elf_use_plts_and_copy_relocs 149 (struct bfd_link_info *); 150 extern void _bfd_mips_elf_insn32 151 (struct bfd_link_info *, bfd_boolean); 152 extern bfd_boolean _bfd_mips_elf_init_stubs 153 (struct bfd_link_info *, 154 asection *(*) (const char *, asection *, asection *)); 155 extern bfd_vma _bfd_mips_elf_plt_sym_val 156 (bfd_vma, const asection *, const arelent *rel); 157 extern long _bfd_mips_elf_get_synthetic_symtab 158 (bfd *, long, asymbol **, long, asymbol **, asymbol **); 159 extern void _bfd_mips_post_process_headers 160 (bfd *abfd, struct bfd_link_info *link_info); 161 162 extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections []; 163 164 extern bfd_boolean _bfd_mips_elf_common_definition (Elf_Internal_Sym *); 165 166 static inline bfd_boolean 167 gprel16_reloc_p (unsigned int r_type) 168 { 169 return (r_type == R_MIPS_GPREL16 170 || r_type == R_MIPS16_GPREL 171 || r_type == R_MICROMIPS_GPREL16 172 || r_type == R_MICROMIPS_GPREL7_S2); 173 } 174 175 static inline bfd_boolean 176 literal_reloc_p (int r_type) 177 { 178 return r_type == R_MIPS_LITERAL || r_type == R_MICROMIPS_LITERAL; 179 } 180 181 #define elf_backend_common_definition _bfd_mips_elf_common_definition 182 #define elf_backend_name_local_section_symbols \ 183 _bfd_mips_elf_name_local_section_symbols 184 #define elf_backend_special_sections _bfd_mips_elf_special_sections 185 #define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size 186 #define elf_backend_merge_symbol_attribute _bfd_mips_elf_merge_symbol_attribute 187 #define elf_backend_ignore_undef_symbol _bfd_mips_elf_ignore_undef_symbol 188 #define elf_backend_post_process_headers _bfd_mips_post_process_headers 189