1 /* MIPS ELF specific backend routines.
2 Copyright (C) 2002-2019 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
21 #include "elf/common.h"
22 #include "elf/internal.h"
25 extern bfd_boolean _bfd_mips_elf_mkobject
27 extern bfd_boolean _bfd_mips_elf_new_section_hook
29 extern void _bfd_mips_elf_symbol_processing
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
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 *,
65 extern bfd_boolean _bfd_mips_vxworks_finish_dynamic_symbol
66 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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
72 extern void _bfd_mips_final_write_processing
74 extern void _bfd_mips_elf_final_write_processing
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
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,
105 extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create
107 extern struct bfd_link_hash_table *_bfd_mips_vxworks_link_hash_table_create
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
115 extern const char * _bfd_mips_fp_abi_string
117 extern bfd_boolean _bfd_mips_elf_print_private_bfd_data
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 *);
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
144 extern bfd_vma _bfd_mips_elf_sign_extend
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 void _bfd_mips_post_process_headers
167 (bfd *abfd, struct bfd_link_info *link_info);
169 extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections [];
171 extern bfd_boolean _bfd_mips_elf_common_definition (Elf_Internal_Sym *);
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 *);
176 static inline bfd_boolean
177 gprel16_reloc_p (unsigned int r_type)
179 return (r_type == R_MIPS_GPREL16
180 || r_type == R_MIPS16_GPREL
181 || r_type == R_MICROMIPS_GPREL16
182 || r_type == R_MICROMIPS_GPREL7_S2);
185 static inline bfd_boolean
186 literal_reloc_p (int r_type)
188 return r_type == R_MIPS_LITERAL || r_type == R_MICROMIPS_LITERAL;
191 #define elf_backend_common_definition _bfd_mips_elf_common_definition
192 #define elf_backend_name_local_section_symbols \
193 _bfd_mips_elf_name_local_section_symbols
194 #define elf_backend_special_sections _bfd_mips_elf_special_sections
195 #define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size
196 #define elf_backend_merge_symbol_attribute _bfd_mips_elf_merge_symbol_attribute
197 #define elf_backend_ignore_undef_symbol _bfd_mips_elf_ignore_undef_symbol
198 #define elf_backend_post_process_headers _bfd_mips_post_process_headers
199 #define elf_backend_compact_eh_encoding _bfd_mips_elf_compact_eh_encoding
200 #define elf_backend_cant_unwind_opcode _bfd_mips_elf_cant_unwind_opcode
201 #define elf_backend_always_renumber_dynsyms TRUE