1 /* MIPS ELF specific backend routines.
2 Copyright (C) 2002-2023 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 #ifndef MIPS_DEFAULT_R6
33 #define MIPS_DEFAULT_R6 0
34 #endif
35
36 struct ecoff_debug_info;
37
38 extern bool _bfd_mips_elf_mkobject
39 (bfd *);
40 extern bool _bfd_mips_elf_free_cached_info
41 (bfd *);
42 extern bool _bfd_mips_elf_new_section_hook
43 (bfd *, asection *);
44 extern void _bfd_mips_elf_symbol_processing
45 (bfd *, asymbol *);
46 extern unsigned int _bfd_mips_elf_eh_frame_address_size
47 (bfd *, const asection *);
48 extern bool _bfd_mips_elf_name_local_section_symbols
49 (bfd *);
50 extern bool _bfd_mips_elf_section_processing
51 (bfd *, Elf_Internal_Shdr *);
52 extern bool _bfd_mips_elf_section_from_shdr
53 (bfd *, Elf_Internal_Shdr *, const char *, int);
54 extern bool _bfd_mips_elf_fake_sections
55 (bfd *, Elf_Internal_Shdr *, asection *);
56 extern bool _bfd_mips_elf_section_from_bfd_section
57 (bfd *, asection *, int *);
58 extern bool _bfd_mips_elf_add_symbol_hook
59 (bfd *, struct bfd_link_info *, Elf_Internal_Sym *,
60 const char **, flagword *, asection **, bfd_vma *);
61 extern int _bfd_mips_elf_link_output_symbol_hook
62 (struct bfd_link_info *, const char *, Elf_Internal_Sym *,
63 asection *, struct elf_link_hash_entry *);
64 extern bool _bfd_mips_elf_create_dynamic_sections
65 (bfd *, struct bfd_link_info *);
66 extern bool _bfd_mips_elf_check_relocs
67 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
68 extern bool _bfd_mips_elf_adjust_dynamic_symbol
69 (struct bfd_link_info *, struct elf_link_hash_entry *);
70 extern bool _bfd_mips_elf_always_size_sections
71 (bfd *, struct bfd_link_info *);
72 extern bool _bfd_mips_elf_size_dynamic_sections
73 (bfd *, struct bfd_link_info *);
74 extern int _bfd_mips_elf_relocate_section
75 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
76 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
77 extern bool _bfd_mips_elf_finish_dynamic_symbol
78 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
79 Elf_Internal_Sym *);
80 extern bool _bfd_mips_vxworks_finish_dynamic_symbol
81 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
82 Elf_Internal_Sym *);
83 extern bool _bfd_mips_elf_finish_dynamic_sections
84 (bfd *, struct bfd_link_info *);
85 extern bool _bfd_mips_elf_sort_relocs_p
86 (asection *);
87 extern void _bfd_mips_final_write_processing
88 (bfd *);
89 extern bool _bfd_mips_elf_final_write_processing
90 (bfd *);
91 extern int _bfd_mips_elf_additional_program_headers
92 (bfd *, struct bfd_link_info *);
93 extern bool _bfd_mips_elf_modify_segment_map
94 (bfd *, struct bfd_link_info *);
95 extern asection * _bfd_mips_elf_gc_mark_hook
96 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
97 struct elf_link_hash_entry *, Elf_Internal_Sym *);
98 extern void _bfd_mips_elf_copy_indirect_symbol
99 (struct bfd_link_info *, struct elf_link_hash_entry *,
100 struct elf_link_hash_entry *);
101 extern void _bfd_mips_elf_hide_symbol
102 (struct bfd_link_info *, struct elf_link_hash_entry *, bool);
103 extern bool _bfd_mips_elf_ignore_discarded_relocs
104 (asection *);
105 extern bool _bfd_mips_elf_is_target_special_symbol
106 (bfd *abfd, asymbol *sym);
107 extern bool _bfd_mips_elf_find_nearest_line
108 (bfd *, asymbol **, asection *, bfd_vma,
109 const char **, const char **, unsigned int *, unsigned int *);
110 #define _bfd_mips_elf_find_nearest_line_with_alt \
111 _bfd_nosymbols_find_nearest_line_with_alt
112 extern bool _bfd_mips_elf_find_inliner_info
113 (bfd *, const char **, const char **, unsigned int *);
114 extern bool _bfd_mips_elf_set_section_contents
115 (bfd *, asection *, const void *, file_ptr, bfd_size_type);
116 extern bfd_byte *_bfd_elf_mips_get_relocated_section_contents
117 (bfd *, struct bfd_link_info *, struct bfd_link_order *,
118 bfd_byte *, bool, asymbol **);
119 extern bool _bfd_mips_elf_relax_section
120 (bfd *abfd, asection *sec, struct bfd_link_info *link_info,
121 bool *again);
122 extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create
123 (bfd *);
124 extern struct bfd_link_hash_table *_bfd_mips_vxworks_link_hash_table_create
125 (bfd *);
126 extern bool _bfd_mips_elf_final_link
127 (bfd *, struct bfd_link_info *);
128 extern bool _bfd_mips_elf_merge_private_bfd_data
129 (bfd *, struct bfd_link_info *);
130 extern bool _bfd_mips_elf_set_private_flags
131 (bfd *, flagword);
132 extern const char * _bfd_mips_fp_abi_string
133 (int);
134 extern bool _bfd_mips_elf_print_private_bfd_data
135 (bfd *, void *);
136 extern bool _bfd_mips_elf_discard_info
137 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
138 extern bool _bfd_mips_elf_write_section
139 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
140
141 extern bool _bfd_mips_elf_read_ecoff_info
142 (bfd *, asection *, struct ecoff_debug_info *);
143 extern void _bfd_mips_elf_reloc_unshuffle
144 (bfd *, int, bool, bfd_byte *);
145 extern void _bfd_mips_elf_reloc_shuffle
146 (bfd *, int, bool, bfd_byte *);
147 extern bool _bfd_mips_reloc_offset_in_range
148 (bfd *, asection *, arelent *, enum reloc_check);
149 extern bfd_reloc_status_type _bfd_mips_elf_gprel16_with_gp
150 (bfd *, asymbol *, arelent *, asection *, bool, void *, bfd_vma);
151 extern bfd_reloc_status_type _bfd_mips_elf32_gprel16_reloc
152 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
153 extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc
154 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
155 extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc
156 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
157 extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc
158 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
159 extern bfd_reloc_status_type _bfd_mips_elf_generic_reloc
160 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
161 extern unsigned long _bfd_elf_mips_mach
162 (flagword);
163 extern bfd_vma _bfd_mips_elf_sign_extend
164 (bfd_vma, int);
165 extern void _bfd_mips_elf_merge_symbol_attribute
166 (struct elf_link_hash_entry *, unsigned int, bool, bool);
167 extern char *_bfd_mips_elf_get_target_dtag (bfd_vma);
168 extern bool _bfd_mips_elf_ignore_undef_symbol
169 (struct elf_link_hash_entry *);
170 extern void _bfd_mips_elf_use_plts_and_copy_relocs
171 (struct bfd_link_info *);
172 extern void _bfd_mips_elf_linker_flags
173 (struct bfd_link_info *, bool, bool, bool);
174 extern void _bfd_mips_elf_compact_branches
175 (struct bfd_link_info *, bool);
176 extern bool _bfd_mips_elf_init_stubs
177 (struct bfd_link_info *,
178 asection *(*) (const char *, asection *, asection *));
179 extern bfd_vma _bfd_mips_elf_plt_sym_val
180 (bfd_vma, const asection *, const arelent *rel);
181 extern long _bfd_mips_elf_get_synthetic_symtab
182 (bfd *, long, asymbol **, long, asymbol **, asymbol **);
183 extern bool _bfd_mips_elf_gc_mark_extra_sections
184 (struct bfd_link_info *, elf_gc_mark_hook_fn);
185 extern bool _bfd_mips_init_file_header
186 (bfd *abfd, struct bfd_link_info *link_info);
187
188 extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections [];
189
190 extern bool _bfd_mips_elf_common_definition (Elf_Internal_Sym *);
191
192 extern int _bfd_mips_elf_compact_eh_encoding (struct bfd_link_info *);
193 extern int _bfd_mips_elf_cant_unwind_opcode (struct bfd_link_info *);
194
195 extern void _bfd_mips_elf_record_xhash_symbol
196 (struct elf_link_hash_entry *h, bfd_vma xlat_loc);
197
198 /* MIPS ABI flags data access. For the disassembler. */
199 extern struct elf_internal_abiflags_v0 *bfd_mips_elf_get_abiflags (bfd *);
200
201 static inline bool
202 gprel16_reloc_p (unsigned int r_type)
203 {
204 return (r_type == R_MIPS_GPREL16
205 || r_type == R_MIPS16_GPREL
206 || r_type == R_MICROMIPS_GPREL16
207 || r_type == R_MICROMIPS_GPREL7_S2);
208 }
209
210 static inline bool
211 literal_reloc_p (int r_type)
212 {
213 return r_type == R_MIPS_LITERAL || r_type == R_MICROMIPS_LITERAL;
214 }
215
216 #define elf_backend_common_definition _bfd_mips_elf_common_definition
217 #define elf_backend_name_local_section_symbols \
218 _bfd_mips_elf_name_local_section_symbols
219 #define elf_backend_special_sections _bfd_mips_elf_special_sections
220 #define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size
221 #define elf_backend_merge_symbol_attribute _bfd_mips_elf_merge_symbol_attribute
222 #define elf_backend_ignore_undef_symbol _bfd_mips_elf_ignore_undef_symbol
223 #define elf_backend_init_file_header _bfd_mips_init_file_header
224 #define elf_backend_compact_eh_encoding _bfd_mips_elf_compact_eh_encoding
225 #define elf_backend_cant_unwind_opcode _bfd_mips_elf_cant_unwind_opcode
226 #define elf_backend_record_xhash_symbol _bfd_mips_elf_record_xhash_symbol
227 #define elf_backend_always_renumber_dynsyms true