Commit | Line | Data |
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73934d31 | 1 | # This shell script emits a C file. -*- C -*- |
b90efa5b | 2 | # Copyright (C) 2004-2015 Free Software Foundation, Inc. |
73934d31 | 3 | # |
f96b4a7b | 4 | # This file is part of the GNU Binutils. |
73934d31 RS |
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 | |
f96b4a7b | 8 | # the Free Software Foundation; either version 3 of the License, or |
73934d31 RS |
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 | |
f96b4a7b NC |
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. | |
73934d31 | 20 | |
92b93329 | 21 | fragment <<EOF |
861fb55a DJ |
22 | |
23 | #include "ldctor.h" | |
24 | #include "elf/mips.h" | |
25 | #include "elfxx-mips.h" | |
26 | ||
27 | #define is_mips_elf(bfd) \ | |
28 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
29 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 30 | && elf_object_id (bfd) == MIPS_ELF_DATA) |
861fb55a DJ |
31 | |
32 | /* Fake input file for stubs. */ | |
33 | static lang_input_statement_type *stub_file; | |
34 | static bfd *stub_bfd; | |
35 | ||
833794fc MR |
36 | static bfd_boolean insn32; |
37 | ||
73934d31 RS |
38 | static void |
39 | mips_after_parse (void) | |
40 | { | |
41 | /* .gnu.hash and the MIPS ABI require .dynsym to be sorted in different | |
42 | ways. .gnu.hash needs symbols to be grouped by hash code whereas the | |
43 | MIPS ABI requires a mapping between the GOT and the symbol table. */ | |
44 | if (link_info.emit_gnu_hash) | |
45 | { | |
46 | einfo ("%X%P: .gnu.hash is incompatible with the MIPS ABI\n"); | |
47 | link_info.emit_hash = TRUE; | |
48 | link_info.emit_gnu_hash = FALSE; | |
49 | } | |
eeaa4577 | 50 | after_parse_default (); |
73934d31 | 51 | } |
861fb55a DJ |
52 | |
53 | struct hook_stub_info | |
54 | { | |
55 | lang_statement_list_type add; | |
56 | asection *input_section; | |
57 | }; | |
58 | ||
59 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
60 | ||
61 | static bfd_boolean | |
62 | hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) | |
63 | { | |
64 | lang_statement_union_type *l; | |
65 | bfd_boolean ret; | |
66 | ||
67 | for (; (l = *lp) != NULL; lp = &l->header.next) | |
68 | { | |
69 | switch (l->header.type) | |
70 | { | |
71 | case lang_constructors_statement_enum: | |
72 | ret = hook_in_stub (info, &constructor_list.head); | |
73 | if (ret) | |
74 | return ret; | |
75 | break; | |
76 | ||
77 | case lang_output_section_statement_enum: | |
78 | ret = hook_in_stub (info, | |
79 | &l->output_section_statement.children.head); | |
80 | if (ret) | |
81 | return ret; | |
82 | break; | |
83 | ||
84 | case lang_wild_statement_enum: | |
85 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
86 | if (ret) | |
87 | return ret; | |
88 | break; | |
89 | ||
90 | case lang_group_statement_enum: | |
91 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
92 | if (ret) | |
93 | return ret; | |
94 | break; | |
95 | ||
96 | case lang_input_section_enum: | |
97 | if (info->input_section == NULL | |
98 | || l->input_section.section == info->input_section) | |
99 | { | |
100 | /* We've found our section. Insert the stub immediately | |
101 | before its associated input section. */ | |
102 | *lp = info->add.head; | |
103 | *(info->add.tail) = l; | |
104 | return TRUE; | |
105 | } | |
106 | break; | |
107 | ||
108 | case lang_data_statement_enum: | |
109 | case lang_reloc_statement_enum: | |
110 | case lang_object_symbols_statement_enum: | |
111 | case lang_output_statement_enum: | |
112 | case lang_target_statement_enum: | |
113 | case lang_input_statement_enum: | |
114 | case lang_assignment_statement_enum: | |
115 | case lang_padding_statement_enum: | |
116 | case lang_address_statement_enum: | |
117 | case lang_fill_statement_enum: | |
118 | break; | |
119 | ||
120 | default: | |
121 | FAIL (); | |
122 | break; | |
123 | } | |
124 | } | |
125 | return FALSE; | |
126 | } | |
127 | ||
128 | /* Create a new stub section called STUB_SEC_NAME and arrange for it to | |
129 | be linked in OUTPUT_SECTION. The section should go at the beginning of | |
130 | OUTPUT_SECTION if INPUT_SECTION is null, otherwise it must go immediately | |
131 | before INPUT_SECTION. */ | |
132 | ||
133 | static asection * | |
134 | mips_add_stub_section (const char *stub_sec_name, asection *input_section, | |
135 | asection *output_section) | |
136 | { | |
137 | asection *stub_sec; | |
138 | flagword flags; | |
861fb55a DJ |
139 | lang_output_section_statement_type *os; |
140 | struct hook_stub_info info; | |
141 | ||
ba85c43e NC |
142 | /* PR 12845: If the input section has been garbage collected it will |
143 | not have its output section set to *ABS*. */ | |
144 | if (bfd_is_abs_section (output_section)) | |
145 | return NULL; | |
146 | ||
861fb55a DJ |
147 | /* Create the stub file, if we haven't already. */ |
148 | if (stub_file == NULL) | |
149 | { | |
150 | stub_file = lang_add_input_file ("linker stubs", | |
151 | lang_input_file_is_fake_enum, | |
152 | NULL); | |
153 | stub_bfd = bfd_create ("linker stubs", link_info.output_bfd); | |
154 | if (stub_bfd == NULL | |
155 | || !bfd_set_arch_mach (stub_bfd, | |
156 | bfd_get_arch (link_info.output_bfd), | |
157 | bfd_get_mach (link_info.output_bfd))) | |
158 | { | |
159 | einfo ("%F%P: can not create BFD %E\n"); | |
160 | return NULL; | |
161 | } | |
162 | stub_bfd->flags |= BFD_LINKER_CREATED; | |
163 | stub_file->the_bfd = stub_bfd; | |
164 | ldlang_add_file (stub_file); | |
165 | } | |
166 | ||
167 | /* Create the section. */ | |
168 | stub_sec = bfd_make_section_anyway (stub_bfd, stub_sec_name); | |
169 | if (stub_sec == NULL) | |
170 | goto err_ret; | |
171 | ||
172 | /* Set the flags. */ | |
173 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
174 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP); | |
175 | if (!bfd_set_section_flags (stub_bfd, stub_sec, flags)) | |
176 | goto err_ret; | |
177 | ||
24ef1aa7 | 178 | os = lang_output_section_get (output_section); |
861fb55a DJ |
179 | |
180 | /* Initialize a statement list that contains only the new statement. */ | |
181 | lang_list_init (&info.add); | |
b9c361e0 | 182 | lang_add_section (&info.add, stub_sec, NULL, os); |
861fb55a DJ |
183 | if (info.add.head == NULL) |
184 | goto err_ret; | |
185 | ||
186 | /* Insert the new statement in the appropriate place. */ | |
187 | info.input_section = input_section; | |
188 | if (hook_in_stub (&info, &os->children.head)) | |
189 | return stub_sec; | |
190 | ||
191 | err_ret: | |
192 | einfo ("%X%P: can not make stub section: %E\n"); | |
193 | return NULL; | |
194 | } | |
195 | ||
196 | /* This is called before the input files are opened. */ | |
197 | ||
198 | static void | |
199 | mips_create_output_section_statements (void) | |
200 | { | |
833794fc MR |
201 | struct elf_link_hash_table *htab; |
202 | ||
203 | htab = elf_hash_table (&link_info); | |
204 | if (is_elf_hash_table (htab) && is_mips_elf (link_info.output_bfd)) | |
205 | _bfd_mips_elf_insn32 (&link_info, insn32); | |
206 | ||
861fb55a DJ |
207 | if (is_mips_elf (link_info.output_bfd)) |
208 | _bfd_mips_elf_init_stubs (&link_info, mips_add_stub_section); | |
209 | } | |
210 | ||
211 | /* This is called after we have merged the private data of the input bfds. */ | |
212 | ||
213 | static void | |
214 | mips_before_allocation (void) | |
215 | { | |
216 | flagword flags; | |
217 | ||
218 | flags = elf_elfheader (link_info.output_bfd)->e_flags; | |
219 | if (!link_info.shared | |
220 | && !link_info.nocopyreloc | |
221 | && (flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) == EF_MIPS_CPIC) | |
222 | _bfd_mips_elf_use_plts_and_copy_relocs (&link_info); | |
223 | ||
224 | gld${EMULATION_NAME}_before_allocation (); | |
225 | } | |
226 | ||
227 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
228 | check_needed routines. */ | |
229 | ||
230 | static void (*real_func) (lang_input_statement_type *); | |
231 | ||
232 | static void mips_for_each_input_file_wrapper (lang_input_statement_type *l) | |
233 | { | |
234 | if (l != stub_file) | |
235 | (*real_func) (l); | |
236 | } | |
237 | ||
238 | static void | |
239 | mips_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) | |
240 | { | |
241 | real_func = func; | |
242 | lang_for_each_input_file (&mips_for_each_input_file_wrapper); | |
243 | } | |
244 | ||
245 | #define lang_for_each_input_file mips_lang_for_each_input_file | |
246 | ||
73934d31 RS |
247 | EOF |
248 | ||
833794fc MR |
249 | # Define some shell vars to insert bits of code into the standard elf |
250 | # parse_args and list_options functions. | |
251 | # | |
252 | PARSE_AND_LIST_PROLOGUE=' | |
253 | #define OPTION_INSN32 301 | |
254 | #define OPTION_NO_INSN32 (OPTION_INSN32 + 1) | |
255 | ' | |
256 | ||
257 | PARSE_AND_LIST_LONGOPTS=' | |
258 | { "insn32", no_argument, NULL, OPTION_INSN32 }, | |
259 | { "no-insn32", no_argument, NULL, OPTION_NO_INSN32 }, | |
260 | ' | |
261 | ||
262 | PARSE_AND_LIST_OPTIONS=' | |
263 | fprintf (file, _("\ | |
264 | --insn32 Only generate 32-bit microMIPS instructions\n" | |
265 | )); | |
266 | fprintf (file, _("\ | |
267 | --no-insn32 Generate all microMIPS instructions\n" | |
268 | )); | |
269 | ' | |
270 | ||
271 | PARSE_AND_LIST_ARGS_CASES=' | |
272 | case OPTION_INSN32: | |
273 | insn32 = TRUE; | |
274 | break; | |
275 | ||
276 | case OPTION_NO_INSN32: | |
277 | insn32 = FALSE; | |
278 | break; | |
279 | ' | |
280 | ||
73934d31 | 281 | LDEMUL_AFTER_PARSE=mips_after_parse |
861fb55a DJ |
282 | LDEMUL_BEFORE_ALLOCATION=mips_before_allocation |
283 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=mips_create_output_section_statements |