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
25extern bfd_boolean _bfd_mips_elf_mkobject
26  (bfd *);
27extern bfd_boolean _bfd_mips_elf_new_section_hook
28  (bfd *, asection *);
29extern void _bfd_mips_elf_symbol_processing
30  (bfd *, asymbol *);
31extern unsigned int _bfd_mips_elf_eh_frame_address_size
32  (bfd *, const asection *);
33extern bfd_boolean _bfd_mips_elf_name_local_section_symbols
34  (bfd *);
35extern bfd_boolean _bfd_mips_elf_section_processing
36  (bfd *, Elf_Internal_Shdr *);
37extern bfd_boolean _bfd_mips_elf_section_from_shdr
38  (bfd *, Elf_Internal_Shdr *, const char *, int);
39extern bfd_boolean _bfd_mips_elf_fake_sections
40  (bfd *, Elf_Internal_Shdr *, asection *);
41extern bfd_boolean _bfd_mips_elf_section_from_bfd_section
42  (bfd *, asection *, int *);
43extern bfd_boolean _bfd_mips_elf_add_symbol_hook
44  (bfd *, struct bfd_link_info *, Elf_Internal_Sym *,
45   const char **, flagword *, asection **, bfd_vma *);
46extern 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 *);
49extern bfd_boolean _bfd_mips_elf_create_dynamic_sections
50  (bfd *, struct bfd_link_info *);
51extern bfd_boolean _bfd_mips_elf_check_relocs
52  (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
53extern bfd_boolean _bfd_mips_elf_adjust_dynamic_symbol
54  (struct bfd_link_info *, struct elf_link_hash_entry *);
55extern bfd_boolean _bfd_mips_elf_always_size_sections
56  (bfd *, struct bfd_link_info *);
57extern bfd_boolean _bfd_mips_elf_size_dynamic_sections
58  (bfd *, struct bfd_link_info *);
59extern 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 **);
62extern bfd_boolean _bfd_mips_elf_finish_dynamic_symbol
63  (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
64   Elf_Internal_Sym *);
65extern bfd_boolean _bfd_mips_vxworks_finish_dynamic_symbol
66  (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
67   Elf_Internal_Sym *);
68extern bfd_boolean _bfd_mips_elf_finish_dynamic_sections
69  (bfd *, struct bfd_link_info *);
70extern bfd_boolean _bfd_mips_elf_sort_relocs_p
71  (asection *);
72extern void _bfd_mips_final_write_processing
73  (bfd *);
74extern bfd_boolean _bfd_mips_elf_final_write_processing
75  (bfd *);
76extern int _bfd_mips_elf_additional_program_headers
77  (bfd *, struct bfd_link_info *);
78extern bfd_boolean _bfd_mips_elf_modify_segment_map
79  (bfd *, struct bfd_link_info *);
80extern 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 *);
83extern void _bfd_mips_elf_copy_indirect_symbol
84  (struct bfd_link_info *, struct elf_link_hash_entry *,
85   struct elf_link_hash_entry *);
86extern void _bfd_mips_elf_hide_symbol
87  (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
88extern bfd_boolean _bfd_mips_elf_ignore_discarded_relocs
89  (asection *);
90extern bfd_boolean _bfd_mips_elf_is_target_special_symbol
91  (bfd *abfd, asymbol *sym);
92extern bfd_boolean _bfd_mips_elf_find_nearest_line
93  (bfd *, asymbol **, asection *, bfd_vma,
94   const char **, const char **, unsigned int *, unsigned int *);
95extern bfd_boolean _bfd_mips_elf_find_inliner_info
96  (bfd *, const char **, const char **, unsigned int *);
97extern bfd_boolean _bfd_mips_elf_set_section_contents
98  (bfd *, asection *, const void *, file_ptr, bfd_size_type);
99extern 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 **);
102extern bfd_boolean _bfd_mips_elf_relax_section
103  (bfd *abfd, asection *sec, struct bfd_link_info *link_info,
104   bfd_boolean *again);
105extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create
106  (bfd *);
107extern struct bfd_link_hash_table *_bfd_mips_vxworks_link_hash_table_create
108  (bfd *);
109extern bfd_boolean _bfd_mips_elf_final_link
110  (bfd *, struct bfd_link_info *);
111extern bfd_boolean _bfd_mips_elf_merge_private_bfd_data
112  (bfd *, struct bfd_link_info *);
113extern bfd_boolean _bfd_mips_elf_set_private_flags
114  (bfd *, flagword);
115extern const char * _bfd_mips_fp_abi_string
116  (int);
117extern bfd_boolean _bfd_mips_elf_print_private_bfd_data
118  (bfd *, void *);
119extern bfd_boolean _bfd_mips_elf_discard_info
120  (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
121extern bfd_boolean _bfd_mips_elf_write_section
122  (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
123
124extern bfd_boolean _bfd_mips_elf_read_ecoff_info
125  (bfd *, asection *, struct ecoff_debug_info *);
126extern void _bfd_mips_elf_reloc_unshuffle
127  (bfd *, int, bfd_boolean, bfd_byte *);
128extern void _bfd_mips_elf_reloc_shuffle
129  (bfd *, int, bfd_boolean, bfd_byte *);
130extern bfd_reloc_status_type _bfd_mips_elf_gprel16_with_gp
131  (bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma);
132extern bfd_reloc_status_type _bfd_mips_elf32_gprel16_reloc
133  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
134extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc
135  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
136extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc
137  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
138extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc
139  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
140extern bfd_reloc_status_type _bfd_mips_elf_generic_reloc
141  (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
142extern unsigned long _bfd_elf_mips_mach
143  (flagword);
144extern bfd_vma _bfd_mips_elf_sign_extend
145  (bfd_vma, int);
146extern void _bfd_mips_elf_merge_symbol_attribute
147  (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, bfd_boolean);
148extern char *_bfd_mips_elf_get_target_dtag (bfd_vma);
149extern bfd_boolean _bfd_mips_elf_ignore_undef_symbol
150  (struct elf_link_hash_entry *);
151extern void _bfd_mips_elf_use_plts_and_copy_relocs
152  (struct bfd_link_info *);
153extern void _bfd_mips_elf_linker_flags
154  (struct bfd_link_info *, bfd_boolean, bfd_boolean, bfd_boolean);
155extern void _bfd_mips_elf_compact_branches
156  (struct bfd_link_info *, bfd_boolean);
157extern bfd_boolean _bfd_mips_elf_init_stubs
158  (struct bfd_link_info *,
159   asection *(*) (const char *, asection *, asection *));
160extern bfd_vma _bfd_mips_elf_plt_sym_val
161  (bfd_vma, const asection *, const arelent *rel);
162extern long _bfd_mips_elf_get_synthetic_symtab
163  (bfd *, long, asymbol **, long, asymbol **, asymbol **);
164extern bfd_boolean _bfd_mips_elf_gc_mark_extra_sections
165  (struct bfd_link_info *, elf_gc_mark_hook_fn);
166extern bfd_boolean _bfd_mips_init_file_header
167  (bfd *abfd, struct bfd_link_info *link_info);
168
169extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections [];
170
171extern bfd_boolean _bfd_mips_elf_common_definition (Elf_Internal_Sym *);
172
173extern int _bfd_mips_elf_compact_eh_encoding (struct bfd_link_info *);
174extern int _bfd_mips_elf_cant_unwind_opcode (struct bfd_link_info *);
175
176extern 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.  */
180extern struct elf_internal_abiflags_v0 *bfd_mips_elf_get_abiflags (bfd *);
181
182static inline bfd_boolean
183gprel16_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
191static inline bfd_boolean
192literal_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
209