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1 | /* MIPS ELF specific backend routines. | |
2 | Copyright (C) 2002-2020 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 bfd_boolean _bfd_mips_init_file_header | |
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 | /* MIPS ABI flags data access. For the disassembler. */ | |
180 | extern struct elf_internal_abiflags_v0 *bfd_mips_elf_get_abiflags (bfd *); | |
181 | ||
182 | static inline bfd_boolean | |
183 | gprel16_reloc_p (unsigned int r_type) | |
184 | { | |
185 | return (r_type == R_MIPS_GPREL16 | |
186 | || r_type == R_MIPS16_GPREL | |
187 | || r_type == R_MICROMIPS_GPREL16 | |
188 | || r_type == R_MICROMIPS_GPREL7_S2); | |
189 | } | |
190 | ||
191 | static inline bfd_boolean | |
192 | literal_reloc_p (int r_type) | |
193 | { | |
194 | return r_type == R_MIPS_LITERAL || r_type == R_MICROMIPS_LITERAL; | |
195 | } | |
196 | ||
197 | #define elf_backend_common_definition _bfd_mips_elf_common_definition | |
198 | #define elf_backend_name_local_section_symbols \ | |
199 | _bfd_mips_elf_name_local_section_symbols | |
200 | #define elf_backend_special_sections _bfd_mips_elf_special_sections | |
201 | #define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size | |
202 | #define elf_backend_merge_symbol_attribute _bfd_mips_elf_merge_symbol_attribute | |
203 | #define elf_backend_ignore_undef_symbol _bfd_mips_elf_ignore_undef_symbol | |
204 | #define elf_backend_init_file_header _bfd_mips_init_file_header | |
205 | #define elf_backend_compact_eh_encoding _bfd_mips_elf_compact_eh_encoding | |
206 | #define elf_backend_cant_unwind_opcode _bfd_mips_elf_cant_unwind_opcode | |
207 | #define elf_backend_record_xhash_symbol _bfd_mips_elf_record_xhash_symbol | |
208 | #define elf_backend_always_renumber_dynsyms TRUE |