Commit | Line | Data |
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73934d31 | 1 | # This shell script emits a C file. -*- C -*- |
219d1afa | 2 | # Copyright (C) 2004-2018 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 | 36 | static bfd_boolean insn32; |
8b10b0b3 | 37 | static bfd_boolean ignore_branch_isa; |
833794fc | 38 | |
73934d31 RS |
39 | static void |
40 | mips_after_parse (void) | |
41 | { | |
42 | /* .gnu.hash and the MIPS ABI require .dynsym to be sorted in different | |
43 | ways. .gnu.hash needs symbols to be grouped by hash code whereas the | |
44 | MIPS ABI requires a mapping between the GOT and the symbol table. */ | |
45 | if (link_info.emit_gnu_hash) | |
46 | { | |
d003af55 | 47 | einfo (_("%X%P: .gnu.hash is incompatible with the MIPS ABI\n")); |
73934d31 RS |
48 | link_info.emit_hash = TRUE; |
49 | link_info.emit_gnu_hash = FALSE; | |
50 | } | |
5fe2850d | 51 | gld${EMULATION_NAME}_after_parse (); |
73934d31 | 52 | } |
861fb55a DJ |
53 | |
54 | struct hook_stub_info | |
55 | { | |
56 | lang_statement_list_type add; | |
57 | asection *input_section; | |
58 | }; | |
59 | ||
60 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
61 | ||
62 | static bfd_boolean | |
63 | hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) | |
64 | { | |
65 | lang_statement_union_type *l; | |
66 | bfd_boolean ret; | |
67 | ||
68 | for (; (l = *lp) != NULL; lp = &l->header.next) | |
69 | { | |
70 | switch (l->header.type) | |
71 | { | |
72 | case lang_constructors_statement_enum: | |
73 | ret = hook_in_stub (info, &constructor_list.head); | |
74 | if (ret) | |
75 | return ret; | |
76 | break; | |
77 | ||
78 | case lang_output_section_statement_enum: | |
79 | ret = hook_in_stub (info, | |
80 | &l->output_section_statement.children.head); | |
81 | if (ret) | |
82 | return ret; | |
83 | break; | |
84 | ||
85 | case lang_wild_statement_enum: | |
86 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
87 | if (ret) | |
88 | return ret; | |
89 | break; | |
90 | ||
91 | case lang_group_statement_enum: | |
92 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
93 | if (ret) | |
94 | return ret; | |
95 | break; | |
96 | ||
97 | case lang_input_section_enum: | |
98 | if (info->input_section == NULL | |
99 | || l->input_section.section == info->input_section) | |
100 | { | |
101 | /* We've found our section. Insert the stub immediately | |
102 | before its associated input section. */ | |
103 | *lp = info->add.head; | |
104 | *(info->add.tail) = l; | |
105 | return TRUE; | |
106 | } | |
107 | break; | |
108 | ||
109 | case lang_data_statement_enum: | |
110 | case lang_reloc_statement_enum: | |
111 | case lang_object_symbols_statement_enum: | |
112 | case lang_output_statement_enum: | |
113 | case lang_target_statement_enum: | |
114 | case lang_input_statement_enum: | |
115 | case lang_assignment_statement_enum: | |
116 | case lang_padding_statement_enum: | |
117 | case lang_address_statement_enum: | |
118 | case lang_fill_statement_enum: | |
119 | break; | |
120 | ||
121 | default: | |
122 | FAIL (); | |
123 | break; | |
124 | } | |
125 | } | |
126 | return FALSE; | |
127 | } | |
128 | ||
129 | /* Create a new stub section called STUB_SEC_NAME and arrange for it to | |
130 | be linked in OUTPUT_SECTION. The section should go at the beginning of | |
131 | OUTPUT_SECTION if INPUT_SECTION is null, otherwise it must go immediately | |
132 | before INPUT_SECTION. */ | |
133 | ||
134 | static asection * | |
135 | mips_add_stub_section (const char *stub_sec_name, asection *input_section, | |
136 | asection *output_section) | |
137 | { | |
138 | asection *stub_sec; | |
139 | flagword flags; | |
861fb55a DJ |
140 | lang_output_section_statement_type *os; |
141 | struct hook_stub_info info; | |
142 | ||
ba85c43e NC |
143 | /* PR 12845: If the input section has been garbage collected it will |
144 | not have its output section set to *ABS*. */ | |
145 | if (bfd_is_abs_section (output_section)) | |
146 | return NULL; | |
147 | ||
861fb55a DJ |
148 | /* Create the stub file, if we haven't already. */ |
149 | if (stub_file == NULL) | |
150 | { | |
151 | stub_file = lang_add_input_file ("linker stubs", | |
152 | lang_input_file_is_fake_enum, | |
153 | NULL); | |
154 | stub_bfd = bfd_create ("linker stubs", link_info.output_bfd); | |
155 | if (stub_bfd == NULL | |
156 | || !bfd_set_arch_mach (stub_bfd, | |
157 | bfd_get_arch (link_info.output_bfd), | |
158 | bfd_get_mach (link_info.output_bfd))) | |
159 | { | |
df5f2391 | 160 | einfo (_("%F%P: can not create BFD: %E\n")); |
861fb55a DJ |
161 | return NULL; |
162 | } | |
163 | stub_bfd->flags |= BFD_LINKER_CREATED; | |
164 | stub_file->the_bfd = stub_bfd; | |
165 | ldlang_add_file (stub_file); | |
166 | } | |
167 | ||
168 | /* Create the section. */ | |
169 | stub_sec = bfd_make_section_anyway (stub_bfd, stub_sec_name); | |
170 | if (stub_sec == NULL) | |
171 | goto err_ret; | |
172 | ||
173 | /* Set the flags. */ | |
174 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
175 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP); | |
176 | if (!bfd_set_section_flags (stub_bfd, stub_sec, flags)) | |
177 | goto err_ret; | |
178 | ||
24ef1aa7 | 179 | os = lang_output_section_get (output_section); |
861fb55a DJ |
180 | |
181 | /* Initialize a statement list that contains only the new statement. */ | |
182 | lang_list_init (&info.add); | |
b9c361e0 | 183 | lang_add_section (&info.add, stub_sec, NULL, os); |
861fb55a DJ |
184 | if (info.add.head == NULL) |
185 | goto err_ret; | |
186 | ||
187 | /* Insert the new statement in the appropriate place. */ | |
188 | info.input_section = input_section; | |
189 | if (hook_in_stub (&info, &os->children.head)) | |
190 | return stub_sec; | |
191 | ||
192 | err_ret: | |
d003af55 | 193 | einfo (_("%X%P: can not make stub section: %E\n")); |
861fb55a DJ |
194 | return NULL; |
195 | } | |
196 | ||
197 | /* This is called before the input files are opened. */ | |
198 | ||
199 | static void | |
200 | mips_create_output_section_statements (void) | |
201 | { | |
833794fc MR |
202 | struct elf_link_hash_table *htab; |
203 | ||
204 | htab = elf_hash_table (&link_info); | |
205 | if (is_elf_hash_table (htab) && is_mips_elf (link_info.output_bfd)) | |
8b10b0b3 | 206 | _bfd_mips_elf_linker_flags (&link_info, insn32, ignore_branch_isa); |
833794fc | 207 | |
861fb55a DJ |
208 | if (is_mips_elf (link_info.output_bfd)) |
209 | _bfd_mips_elf_init_stubs (&link_info, mips_add_stub_section); | |
210 | } | |
211 | ||
212 | /* This is called after we have merged the private data of the input bfds. */ | |
213 | ||
214 | static void | |
215 | mips_before_allocation (void) | |
216 | { | |
e54cb31a MR |
217 | if (is_mips_elf (link_info.output_bfd)) |
218 | { | |
219 | flagword flags; | |
861fb55a | 220 | |
e54cb31a MR |
221 | flags = elf_elfheader (link_info.output_bfd)->e_flags; |
222 | if (!bfd_link_pic (&link_info) | |
223 | && !link_info.nocopyreloc | |
224 | && (flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) == EF_MIPS_CPIC) | |
225 | _bfd_mips_elf_use_plts_and_copy_relocs (&link_info); | |
226 | } | |
861fb55a DJ |
227 | |
228 | gld${EMULATION_NAME}_before_allocation (); | |
229 | } | |
230 | ||
231 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
232 | check_needed routines. */ | |
233 | ||
234 | static void (*real_func) (lang_input_statement_type *); | |
235 | ||
236 | static void mips_for_each_input_file_wrapper (lang_input_statement_type *l) | |
237 | { | |
238 | if (l != stub_file) | |
239 | (*real_func) (l); | |
240 | } | |
241 | ||
242 | static void | |
243 | mips_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) | |
244 | { | |
245 | real_func = func; | |
246 | lang_for_each_input_file (&mips_for_each_input_file_wrapper); | |
247 | } | |
248 | ||
249 | #define lang_for_each_input_file mips_lang_for_each_input_file | |
250 | ||
73934d31 RS |
251 | EOF |
252 | ||
833794fc MR |
253 | # Define some shell vars to insert bits of code into the standard elf |
254 | # parse_args and list_options functions. | |
255 | # | |
256 | PARSE_AND_LIST_PROLOGUE=' | |
2f2da8fd MR |
257 | enum |
258 | { | |
259 | OPTION_INSN32 = 301, | |
8b10b0b3 MR |
260 | OPTION_NO_INSN32, |
261 | OPTION_IGNORE_BRANCH_ISA, | |
262 | OPTION_NO_IGNORE_BRANCH_ISA | |
2f2da8fd | 263 | }; |
833794fc MR |
264 | ' |
265 | ||
266 | PARSE_AND_LIST_LONGOPTS=' | |
267 | { "insn32", no_argument, NULL, OPTION_INSN32 }, | |
268 | { "no-insn32", no_argument, NULL, OPTION_NO_INSN32 }, | |
8b10b0b3 MR |
269 | { "ignore-branch-isa", no_argument, NULL, OPTION_IGNORE_BRANCH_ISA }, |
270 | { "no-ignore-branch-isa", no_argument, NULL, OPTION_NO_IGNORE_BRANCH_ISA }, | |
833794fc MR |
271 | ' |
272 | ||
273 | PARSE_AND_LIST_OPTIONS=' | |
274 | fprintf (file, _("\ | |
275 | --insn32 Only generate 32-bit microMIPS instructions\n" | |
276 | )); | |
277 | fprintf (file, _("\ | |
278 | --no-insn32 Generate all microMIPS instructions\n" | |
279 | )); | |
8b10b0b3 MR |
280 | fprintf (file, _("\ |
281 | --ignore-branch-isa Accept invalid branch relocations requiring\n\ | |
282 | an ISA mode switch\n" | |
283 | )); | |
284 | fprintf (file, _("\ | |
285 | --no-ignore-branch-isa Reject invalid branch relocations requiring\n\ | |
286 | an ISA mode switch\n" | |
287 | )); | |
833794fc MR |
288 | ' |
289 | ||
290 | PARSE_AND_LIST_ARGS_CASES=' | |
291 | case OPTION_INSN32: | |
292 | insn32 = TRUE; | |
293 | break; | |
294 | ||
295 | case OPTION_NO_INSN32: | |
296 | insn32 = FALSE; | |
297 | break; | |
8b10b0b3 MR |
298 | |
299 | case OPTION_IGNORE_BRANCH_ISA: | |
300 | ignore_branch_isa = TRUE; | |
301 | break; | |
302 | ||
303 | case OPTION_NO_IGNORE_BRANCH_ISA: | |
304 | ignore_branch_isa = FALSE; | |
305 | break; | |
833794fc MR |
306 | ' |
307 | ||
73934d31 | 308 | LDEMUL_AFTER_PARSE=mips_after_parse |
861fb55a DJ |
309 | LDEMUL_BEFORE_ALLOCATION=mips_before_allocation |
310 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=mips_create_output_section_statements |