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_new_section_hook 27 (bfd *, asection *); 28 extern void _bfd_mips_elf_symbol_processing 29 (bfd *, asymbol *); 30 extern unsigned int _bfd_mips_elf_eh_frame_address_size 31 (bfd *, asection *); 32 extern bfd_boolean _bfd_mips_elf_name_local_section_symbols 33 (bfd *); 34 extern bfd_boolean _bfd_mips_elf_section_processing 35 (bfd *, Elf_Internal_Shdr *); 36 extern bfd_boolean _bfd_mips_elf_section_from_shdr 37 (bfd *, Elf_Internal_Shdr *, const char *, int); 38 extern bfd_boolean _bfd_mips_elf_fake_sections 39 (bfd *, Elf_Internal_Shdr *, asection *); 40 extern bfd_boolean _bfd_mips_elf_section_from_bfd_section 41 (bfd *, asection *, int *); 42 extern bfd_boolean _bfd_mips_elf_add_symbol_hook 43 (bfd *, struct bfd_link_info *, Elf_Internal_Sym *, 44 const char **, flagword *, asection **, bfd_vma *); 45 extern int _bfd_mips_elf_link_output_symbol_hook 46 (struct bfd_link_info *, const char *, Elf_Internal_Sym *, 47 asection *, struct elf_link_hash_entry *); 48 extern bfd_boolean _bfd_mips_elf_create_dynamic_sections 49 (bfd *, struct bfd_link_info *); 50 extern bfd_boolean _bfd_mips_elf_check_relocs 51 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 52 extern bfd_boolean _bfd_mips_elf_adjust_dynamic_symbol 53 (struct bfd_link_info *, struct elf_link_hash_entry *); 54 extern bfd_boolean _bfd_mips_elf_always_size_sections 55 (bfd *, struct bfd_link_info *); 56 extern bfd_boolean _bfd_mips_elf_size_dynamic_sections 57 (bfd *, struct bfd_link_info *); 58 extern bfd_boolean _bfd_mips_elf_relocate_section 59 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, 60 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **); 61 extern bfd_boolean _bfd_mips_elf_finish_dynamic_symbol 62 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 63 Elf_Internal_Sym *); 64 extern bfd_boolean _bfd_mips_vxworks_finish_dynamic_symbol 65 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, 66 Elf_Internal_Sym *); 67 extern bfd_boolean _bfd_mips_elf_finish_dynamic_sections 68 (bfd *, struct bfd_link_info *); 69 extern void _bfd_mips_elf_final_write_processing 70 (bfd *, bfd_boolean); 71 extern int _bfd_mips_elf_additional_program_headers 72 (bfd *, struct bfd_link_info *); 73 extern bfd_boolean _bfd_mips_elf_modify_segment_map 74 (bfd *, struct bfd_link_info *); 75 extern asection * _bfd_mips_elf_gc_mark_hook 76 (asection *, struct bfd_link_info *, Elf_Internal_Rela *, 77 struct elf_link_hash_entry *, Elf_Internal_Sym *); 78 extern bfd_boolean _bfd_mips_elf_gc_sweep_hook 79 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); 80 extern void _bfd_mips_elf_copy_indirect_symbol 81 (struct bfd_link_info *, struct elf_link_hash_entry *, 82 struct elf_link_hash_entry *); 83 extern bfd_boolean _bfd_mips_elf_ignore_discarded_relocs 84 (asection *); 85 extern bfd_boolean _bfd_mips_elf_is_target_special_symbol 86 (bfd *abfd, asymbol *sym); 87 extern bfd_boolean _bfd_mips_elf_find_nearest_line 88 (bfd *, asection *, asymbol **, bfd_vma, const char **, 89 const char **, unsigned int *); 90 extern bfd_boolean _bfd_mips_elf_find_inliner_info 91 (bfd *, const char **, const char **, unsigned int *); 92 extern bfd_boolean _bfd_mips_elf_set_section_contents 93 (bfd *, asection *, const void *, file_ptr, bfd_size_type); 94 extern bfd_byte *_bfd_elf_mips_get_relocated_section_contents 95 (bfd *, struct bfd_link_info *, struct bfd_link_order *, 96 bfd_byte *, bfd_boolean, asymbol **); 97 extern bfd_boolean _bfd_mips_elf_relax_section 98 (bfd *abfd, asection *sec, struct bfd_link_info *link_info, 99 bfd_boolean *again); 100 extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create 101 (bfd *); 102 extern struct bfd_link_hash_table *_bfd_mips_vxworks_link_hash_table_create 103 (bfd *); 104 extern bfd_boolean _bfd_mips_elf_final_link 105 (bfd *, struct bfd_link_info *); 106 extern bfd_boolean _bfd_mips_elf_merge_private_bfd_data 107 (bfd *, bfd *); 108 extern bfd_boolean _bfd_mips_elf_set_private_flags 109 (bfd *, flagword); 110 extern bfd_boolean _bfd_mips_elf_print_private_bfd_data 111 (bfd *, void *); 112 extern bfd_boolean _bfd_mips_elf_discard_info 113 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); 114 extern bfd_boolean _bfd_mips_elf_write_section 115 (bfd *, struct bfd_link_info *, asection *, bfd_byte *); 116 117 extern bfd_boolean _bfd_mips_elf_read_ecoff_info 118 (bfd *, asection *, struct ecoff_debug_info *); 119 extern void _bfd_mips_elf_reloc_unshuffle 120 (bfd *, int, bfd_boolean, bfd_byte *); 121 extern void _bfd_mips_elf_reloc_shuffle 122 (bfd *, int, bfd_boolean, bfd_byte *); 123 extern bfd_reloc_status_type _bfd_mips_elf_gprel16_with_gp 124 (bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma); 125 extern bfd_reloc_status_type _bfd_mips_elf32_gprel16_reloc 126 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 127 extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc 128 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 129 extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc 130 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 131 extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc 132 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 133 extern bfd_reloc_status_type _bfd_mips_elf_generic_reloc 134 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); 135 extern unsigned long _bfd_elf_mips_mach 136 (flagword); 137 extern bfd_boolean _bfd_mips_relax_section 138 (bfd *, asection *, struct bfd_link_info *, bfd_boolean *); 139 extern bfd_vma _bfd_mips_elf_sign_extend 140 (bfd_vma, int); 141 extern void _bfd_mips_elf_merge_symbol_attribute 142 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, bfd_boolean); 143 extern char *_bfd_mips_elf_get_target_dtag (bfd_vma); 144 extern bfd_boolean _bfd_mips_elf_ignore_undef_symbol 145 (struct elf_link_hash_entry *); 146 extern void _bfd_mips_elf_use_plts_and_copy_relocs 147 (struct bfd_link_info *); 148 extern bfd_boolean _bfd_mips_elf_init_stubs 149 (struct bfd_link_info *, 150 asection *(*) (const char *, asection *, asection *)); 151 extern bfd_vma _bfd_mips_elf_plt_sym_val 152 (bfd_vma, const asection *, const arelent *rel); 153 extern void _bfd_mips_post_process_headers 154 (bfd *abfd, struct bfd_link_info *link_info); 155 156 extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections []; 157 158 extern bfd_boolean _bfd_mips_elf_common_definition (Elf_Internal_Sym *); 159 160 static inline bfd_boolean 161 gprel16_reloc_p (unsigned int r_type) 162 { 163 return (r_type == R_MIPS_GPREL16 164 || r_type == R_MIPS16_GPREL 165 || r_type == R_MICROMIPS_GPREL16 166 || r_type == R_MICROMIPS_GPREL7_S2); 167 } 168 169 static inline bfd_boolean 170 literal_reloc_p (int r_type) 171 { 172 return r_type == R_MIPS_LITERAL || r_type == R_MICROMIPS_LITERAL; 173 } 174 175 #define elf_backend_common_definition _bfd_mips_elf_common_definition 176 #define elf_backend_name_local_section_symbols \ 177 _bfd_mips_elf_name_local_section_symbols 178 #define elf_backend_special_sections _bfd_mips_elf_special_sections 179 #define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size 180 #define elf_backend_merge_symbol_attribute _bfd_mips_elf_merge_symbol_attribute 181 #define elf_backend_ignore_undef_symbol _bfd_mips_elf_ignore_undef_symbol 182 #define elf_backend_post_process_headers _bfd_mips_post_process_headers 183