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_mkobject
27 (bfd *);
28 extern bfd_boolean _bfd_mips_elf_new_section_hook
29 (bfd *, asection *);
30 extern void _bfd_mips_elf_symbol_processing
31 (bfd *, asymbol *);
32 extern unsigned int _bfd_mips_elf_eh_frame_address_size
33 (bfd *, asection *);
34 extern bfd_boolean _bfd_mips_elf_name_local_section_symbols
35 (bfd *);
36 extern bfd_boolean _bfd_mips_elf_section_processing
37 (bfd *, Elf_Internal_Shdr *);
38 extern bfd_boolean _bfd_mips_elf_section_from_shdr
39 (bfd *, Elf_Internal_Shdr *, const char *, int);
40 extern bfd_boolean _bfd_mips_elf_fake_sections
41 (bfd *, Elf_Internal_Shdr *, asection *);
42 extern bfd_boolean _bfd_mips_elf_section_from_bfd_section
43 (bfd *, asection *, int *);
44 extern bfd_boolean _bfd_mips_elf_add_symbol_hook
45 (bfd *, struct bfd_link_info *, Elf_Internal_Sym *,
46 const char **, flagword *, asection **, bfd_vma *);
47 extern int _bfd_mips_elf_link_output_symbol_hook
48 (struct bfd_link_info *, const char *, Elf_Internal_Sym *,
49 asection *, struct elf_link_hash_entry *);
50 extern bfd_boolean _bfd_mips_elf_create_dynamic_sections
51 (bfd *, struct bfd_link_info *);
52 extern bfd_boolean _bfd_mips_elf_check_relocs
53 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
54 extern bfd_boolean _bfd_mips_elf_adjust_dynamic_symbol
55 (struct bfd_link_info *, struct elf_link_hash_entry *);
56 extern bfd_boolean _bfd_mips_elf_always_size_sections
57 (bfd *, struct bfd_link_info *);
58 extern bfd_boolean _bfd_mips_elf_size_dynamic_sections
59 (bfd *, struct bfd_link_info *);
60 extern bfd_boolean _bfd_mips_elf_relocate_section
61 (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
62 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
63 extern bfd_boolean _bfd_mips_elf_finish_dynamic_symbol
64 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
65 Elf_Internal_Sym *);
66 extern bfd_boolean _bfd_mips_vxworks_finish_dynamic_symbol
67 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
68 Elf_Internal_Sym *);
69 extern bfd_boolean _bfd_mips_elf_finish_dynamic_sections
70 (bfd *, struct bfd_link_info *);
71 extern void _bfd_mips_elf_final_write_processing
72 (bfd *, bfd_boolean);
73 extern int _bfd_mips_elf_additional_program_headers
74 (bfd *, struct bfd_link_info *);
75 extern bfd_boolean _bfd_mips_elf_modify_segment_map
76 (bfd *, struct bfd_link_info *);
77 extern asection * _bfd_mips_elf_gc_mark_hook
78 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
79 struct elf_link_hash_entry *, Elf_Internal_Sym *);
80 extern bfd_boolean _bfd_mips_elf_gc_sweep_hook
81 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
82 extern void _bfd_mips_elf_copy_indirect_symbol
83 (struct bfd_link_info *, struct elf_link_hash_entry *,
84 struct elf_link_hash_entry *);
85 extern bfd_boolean _bfd_mips_elf_ignore_discarded_relocs
86 (asection *);
87 extern bfd_boolean _bfd_mips_elf_is_target_special_symbol
88 (bfd *abfd, asymbol *sym);
89 extern bfd_boolean _bfd_mips_elf_find_nearest_line
90 (bfd *, asection *, asymbol **, bfd_vma, const char **,
91 const char **, unsigned int *);
92 extern bfd_boolean _bfd_mips_elf_find_inliner_info
93 (bfd *, const char **, const char **, unsigned int *);
94 extern bfd_boolean _bfd_mips_elf_set_section_contents
95 (bfd *, asection *, const void *, file_ptr, bfd_size_type);
96 extern bfd_byte *_bfd_elf_mips_get_relocated_section_contents
97 (bfd *, struct bfd_link_info *, struct bfd_link_order *,
98 bfd_byte *, bfd_boolean, asymbol **);
99 extern bfd_boolean _bfd_mips_elf_relax_section
100 (bfd *abfd, asection *sec, struct bfd_link_info *link_info,
101 bfd_boolean *again);
102 extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create
103 (bfd *);
104 extern struct bfd_link_hash_table *_bfd_mips_vxworks_link_hash_table_create
105 (bfd *);
106 extern bfd_boolean _bfd_mips_elf_final_link
107 (bfd *, struct bfd_link_info *);
108 extern bfd_boolean _bfd_mips_elf_merge_private_bfd_data
109 (bfd *, bfd *);
110 extern bfd_boolean _bfd_mips_elf_set_private_flags
111 (bfd *, flagword);
112 extern bfd_boolean _bfd_mips_elf_print_private_bfd_data
113 (bfd *, void *);
114 extern bfd_boolean _bfd_mips_elf_discard_info
115 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
116 extern bfd_boolean _bfd_mips_elf_write_section
117 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
118
119 extern bfd_boolean _bfd_mips_elf_read_ecoff_info
120 (bfd *, asection *, struct ecoff_debug_info *);
121 extern void _bfd_mips_elf_reloc_unshuffle
122 (bfd *, int, bfd_boolean, bfd_byte *);
123 extern void _bfd_mips_elf_reloc_shuffle
124 (bfd *, int, bfd_boolean, bfd_byte *);
125 extern bfd_reloc_status_type _bfd_mips_elf_gprel16_with_gp
126 (bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma);
127 extern bfd_reloc_status_type _bfd_mips_elf32_gprel16_reloc
128 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
129 extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc
130 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
131 extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc
132 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
133 extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc
134 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
135 extern bfd_reloc_status_type _bfd_mips_elf_generic_reloc
136 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
137 extern unsigned long _bfd_elf_mips_mach
138 (flagword);
139 extern bfd_boolean _bfd_mips_relax_section
140 (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
141 extern bfd_vma _bfd_mips_elf_sign_extend
142 (bfd_vma, int);
143 extern void _bfd_mips_elf_merge_symbol_attribute
144 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, bfd_boolean);
145 extern char *_bfd_mips_elf_get_target_dtag (bfd_vma);
146 extern bfd_boolean _bfd_mips_elf_ignore_undef_symbol
147 (struct elf_link_hash_entry *);
148 extern void _bfd_mips_elf_use_plts_and_copy_relocs
149 (struct bfd_link_info *);
150 extern bfd_boolean _bfd_mips_elf_init_stubs
151 (struct bfd_link_info *,
152 asection *(*) (const char *, asection *, asection *));
153 extern bfd_vma _bfd_mips_elf_plt_sym_val
154 (bfd_vma, const asection *, const arelent *rel);
155 extern void _bfd_mips_post_process_headers
156 (bfd *abfd, struct bfd_link_info *link_info);
157
158 extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections [];
159
160 extern bfd_boolean _bfd_mips_elf_common_definition (Elf_Internal_Sym *);
161
162 static inline bfd_boolean
gprel16_reloc_p(unsigned int r_type)163 gprel16_reloc_p (unsigned int r_type)
164 {
165 return (r_type == R_MIPS_GPREL16
166 || r_type == R_MIPS16_GPREL
167 || r_type == R_MICROMIPS_GPREL16
168 || r_type == R_MICROMIPS_GPREL7_S2);
169 }
170
171 static inline bfd_boolean
literal_reloc_p(int r_type)172 literal_reloc_p (int r_type)
173 {
174 return r_type == R_MIPS_LITERAL || r_type == R_MICROMIPS_LITERAL;
175 }
176
177 #define elf_backend_common_definition _bfd_mips_elf_common_definition
178 #define elf_backend_name_local_section_symbols \
179 _bfd_mips_elf_name_local_section_symbols
180 #define elf_backend_special_sections _bfd_mips_elf_special_sections
181 #define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size
182 #define elf_backend_merge_symbol_attribute _bfd_mips_elf_merge_symbol_attribute
183 #define elf_backend_ignore_undef_symbol _bfd_mips_elf_ignore_undef_symbol
184 #define elf_backend_post_process_headers _bfd_mips_post_process_headers
185