Commit | Line | Data |
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252b5132 | 1 | # This shell script emits a C file. -*- C -*- |
b90efa5b | 2 | # Copyright (C) 1991-2015 Free Software Foundation, Inc. |
41392f03 | 3 | # |
f96b4a7b | 4 | # This file is part of the GNU Binutils. |
41392f03 AM |
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 |
41392f03 AM |
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 | |
f96b4a7b NC |
18 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | # MA 02110-1301, USA. | |
41392f03 AM |
20 | # |
21 | ||
22 | # This file is sourced from elf32.em, and defines extra hppa-elf | |
23 | # specific routines. | |
24 | # | |
92b93329 | 25 | fragment <<EOF |
41392f03 | 26 | |
252b5132 | 27 | #include "ldctor.h" |
4900fc06 | 28 | #include "elf32-hppa.h" |
252b5132 | 29 | |
252b5132 | 30 | |
4900fc06 AM |
31 | /* Fake input file for stubs. */ |
32 | static lang_input_statement_type *stub_file; | |
252b5132 | 33 | |
3231d22e AM |
34 | /* Type of import/export stubs to build. For a single sub-space model, |
35 | we can build smaller import stubs and there is no need for export | |
36 | stubs. */ | |
37 | static int multi_subspace = 0; | |
252b5132 | 38 | |
deb04cdb AM |
39 | /* Whether we need to call hppa_layout_sections_again. */ |
40 | static int need_laying_out = 0; | |
41 | ||
47d89dba AM |
42 | /* Maximum size of a group of input sections that can be handled by |
43 | one stub section. A value of +/-1 indicates the bfd back-end | |
44 | should use a suitable default size. */ | |
cfbd8dfa | 45 | static bfd_signed_vma group_size = 1; |
252b5132 | 46 | |
ffd6e9de AM |
47 | /* Stops the linker merging .text sections on a relocatable link, |
48 | and adds millicode library to the list of input files. */ | |
49 | ||
50 | static void | |
0c7a8e5a | 51 | hppaelf_after_parse (void) |
ffd6e9de | 52 | { |
1049f94e | 53 | if (link_info.relocatable) |
ffd6e9de | 54 | lang_add_unique (".text"); |
7a64f7b8 BE |
55 | |
56 | /* Enable this once we split millicode stuff from libgcc: | |
57 | lang_add_input_file ("milli", | |
58 | lang_input_file_is_l_enum, | |
59 | NULL); | |
60 | */ | |
97b11f40 | 61 | |
eeaa4577 | 62 | after_parse_default (); |
ffd6e9de AM |
63 | } |
64 | ||
252b5132 | 65 | /* This is called before the input files are opened. We create a new |
4900fc06 | 66 | fake input file to hold the stub sections. */ |
252b5132 RH |
67 | |
68 | static void | |
0c7a8e5a | 69 | hppaelf_create_output_section_statements (void) |
252b5132 | 70 | { |
5503fea1 | 71 | if (!(bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour |
4dfe6ac6 NC |
72 | && (elf_object_id (link_info.output_bfd) == HPPA32_ELF_DATA |
73 | || elf_object_id (link_info.output_bfd) == HPPA64_ELF_DATA))) | |
fd574c46 AM |
74 | return; |
75 | ||
252b5132 RH |
76 | stub_file = lang_add_input_file ("linker stubs", |
77 | lang_input_file_is_fake_enum, | |
78 | NULL); | |
f13a99db | 79 | stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd); |
252b5132 RH |
80 | if (stub_file->the_bfd == NULL |
81 | || ! bfd_set_arch_mach (stub_file->the_bfd, | |
f13a99db AM |
82 | bfd_get_arch (link_info.output_bfd), |
83 | bfd_get_mach (link_info.output_bfd))) | |
252b5132 RH |
84 | { |
85 | einfo ("%X%P: can not create BFD %E\n"); | |
86 | return; | |
87 | } | |
88 | ||
d457dcf6 | 89 | stub_file->the_bfd->flags |= BFD_LINKER_CREATED; |
252b5132 RH |
90 | ldlang_add_file (stub_file); |
91 | } | |
92 | ||
4900fc06 AM |
93 | |
94 | struct hook_stub_info | |
95 | { | |
96 | lang_statement_list_type add; | |
97 | asection *input_section; | |
98 | }; | |
99 | ||
100 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
101 | ||
b34976b6 | 102 | static bfd_boolean |
0c7a8e5a | 103 | hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) |
4900fc06 AM |
104 | { |
105 | lang_statement_union_type *l; | |
b34976b6 | 106 | bfd_boolean ret; |
4900fc06 | 107 | |
bba1a0c0 | 108 | for (; (l = *lp) != NULL; lp = &l->header.next) |
4900fc06 AM |
109 | { |
110 | switch (l->header.type) | |
111 | { | |
112 | case lang_constructors_statement_enum: | |
113 | ret = hook_in_stub (info, &constructor_list.head); | |
114 | if (ret) | |
115 | return ret; | |
116 | break; | |
117 | ||
118 | case lang_output_section_statement_enum: | |
119 | ret = hook_in_stub (info, | |
120 | &l->output_section_statement.children.head); | |
121 | if (ret) | |
122 | return ret; | |
123 | break; | |
124 | ||
125 | case lang_wild_statement_enum: | |
126 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
127 | if (ret) | |
128 | return ret; | |
129 | break; | |
130 | ||
131 | case lang_group_statement_enum: | |
132 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
133 | if (ret) | |
134 | return ret; | |
135 | break; | |
136 | ||
137 | case lang_input_section_enum: | |
138 | if (l->input_section.section == info->input_section) | |
139 | { | |
140 | /* We've found our section. Insert the stub immediately | |
141 | before its associated input section. */ | |
142 | *lp = info->add.head; | |
143 | *(info->add.tail) = l; | |
b34976b6 | 144 | return TRUE; |
4900fc06 AM |
145 | } |
146 | break; | |
147 | ||
148 | case lang_data_statement_enum: | |
149 | case lang_reloc_statement_enum: | |
150 | case lang_object_symbols_statement_enum: | |
151 | case lang_output_statement_enum: | |
152 | case lang_target_statement_enum: | |
153 | case lang_input_statement_enum: | |
154 | case lang_assignment_statement_enum: | |
155 | case lang_padding_statement_enum: | |
156 | case lang_address_statement_enum: | |
157 | case lang_fill_statement_enum: | |
158 | break; | |
159 | ||
160 | default: | |
161 | FAIL (); | |
162 | break; | |
163 | } | |
164 | } | |
b34976b6 | 165 | return FALSE; |
4900fc06 AM |
166 | } |
167 | ||
41392f03 | 168 | |
4900fc06 AM |
169 | /* Call-back for elf32_hppa_size_stubs. */ |
170 | ||
171 | /* Create a new stub section, and arrange for it to be linked | |
172 | immediately before INPUT_SECTION. */ | |
173 | ||
174 | static asection * | |
0c7a8e5a | 175 | hppaelf_add_stub_section (const char *stub_sec_name, asection *input_section) |
4900fc06 AM |
176 | { |
177 | asection *stub_sec; | |
178 | flagword flags; | |
179 | asection *output_section; | |
4900fc06 AM |
180 | lang_output_section_statement_type *os; |
181 | struct hook_stub_info info; | |
182 | ||
4900fc06 | 183 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE |
3231d22e | 184 | | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP); |
9795b468 AM |
185 | stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd, |
186 | stub_sec_name, flags); | |
187 | if (stub_sec == NULL) | |
4900fc06 AM |
188 | goto err_ret; |
189 | ||
190 | output_section = input_section->output_section; | |
24ef1aa7 | 191 | os = lang_output_section_get (output_section); |
4900fc06 AM |
192 | |
193 | info.input_section = input_section; | |
194 | lang_list_init (&info.add); | |
b9c361e0 | 195 | lang_add_section (&info.add, stub_sec, NULL, os); |
4900fc06 AM |
196 | |
197 | if (info.add.head == NULL) | |
198 | goto err_ret; | |
199 | ||
200 | if (hook_in_stub (&info, &os->children.head)) | |
201 | return stub_sec; | |
202 | ||
203 | err_ret: | |
204 | einfo ("%X%P: can not make stub section: %E\n"); | |
205 | return NULL; | |
206 | } | |
207 | ||
41392f03 | 208 | |
4900fc06 AM |
209 | /* Another call-back for elf32_hppa_size_stubs. */ |
210 | ||
211 | static void | |
0c7a8e5a | 212 | hppaelf_layout_sections_again (void) |
4900fc06 AM |
213 | { |
214 | /* If we have changed sizes of the stub sections, then we need | |
215 | to recalculate all the section offsets. This may mean we need to | |
216 | add even more stubs. */ | |
8ded5a0f AM |
217 | gld${EMULATION_NAME}_map_segments (TRUE); |
218 | need_laying_out = -1; | |
4900fc06 AM |
219 | } |
220 | ||
221 | ||
a3d60be3 | 222 | static void |
0c7a8e5a | 223 | build_section_lists (lang_statement_union_type *statement) |
a3d60be3 | 224 | { |
7b986e99 | 225 | if (statement->header.type == lang_input_section_enum) |
a3d60be3 | 226 | { |
7b986e99 AM |
227 | asection *i = statement->input_section.section; |
228 | ||
dbaa2011 | 229 | if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS |
7b986e99 AM |
230 | && (i->flags & SEC_EXCLUDE) == 0 |
231 | && i->output_section != NULL | |
f13a99db | 232 | && i->output_section->owner == link_info.output_bfd) |
7b986e99 AM |
233 | { |
234 | elf32_hppa_next_input_section (&link_info, i); | |
235 | } | |
a3d60be3 AM |
236 | } |
237 | } | |
238 | ||
239 | ||
eaeb0a9d | 240 | /* For the PA we use this opportunity to size and build linker stubs. */ |
252b5132 RH |
241 | |
242 | static void | |
eaeb0a9d | 243 | gld${EMULATION_NAME}_after_allocation (void) |
252b5132 | 244 | { |
75938853 AM |
245 | int ret; |
246 | ||
eaeb0a9d AM |
247 | /* bfd_elf_discard_info just plays with data and debugging sections, |
248 | ie. doesn't affect code size, so we can delay resizing the | |
deb04cdb AM |
249 | sections. It's likely we'll resize everything in the process of |
250 | adding stubs. */ | |
75938853 AM |
251 | ret = bfd_elf_discard_info (link_info.output_bfd, &link_info); |
252 | if (ret < 0) | |
253 | { | |
254 | einfo ("%X%P: .eh_frame/.stab edit: %E\n"); | |
255 | return; | |
256 | } | |
257 | else if (ret > 0) | |
deb04cdb AM |
258 | need_laying_out = 1; |
259 | ||
836c6af1 AM |
260 | /* If generating a relocatable output file, then we don't |
261 | have to examine the relocs. */ | |
fd574c46 | 262 | if (stub_file != NULL && !link_info.relocatable) |
252b5132 | 263 | { |
75938853 | 264 | ret = elf32_hppa_setup_section_lists (link_info.output_bfd, &link_info); |
836c6af1 | 265 | if (ret != 0) |
a3d60be3 | 266 | { |
836c6af1 AM |
267 | if (ret < 0) |
268 | { | |
269 | einfo ("%X%P: can not size stub section: %E\n"); | |
270 | return; | |
271 | } | |
a3d60be3 | 272 | |
836c6af1 | 273 | lang_for_each_statement (build_section_lists); |
a3d60be3 | 274 | |
836c6af1 | 275 | /* Call into the BFD backend to do the real work. */ |
f13a99db | 276 | if (! elf32_hppa_size_stubs (link_info.output_bfd, |
836c6af1 AM |
277 | stub_file->the_bfd, |
278 | &link_info, | |
279 | multi_subspace, | |
280 | group_size, | |
281 | &hppaelf_add_stub_section, | |
282 | &hppaelf_layout_sections_again)) | |
283 | { | |
284 | einfo ("%X%P: can not size stub section: %E\n"); | |
285 | return; | |
286 | } | |
a3d60be3 | 287 | } |
252b5132 | 288 | } |
4900fc06 | 289 | |
8ded5a0f AM |
290 | if (need_laying_out != -1) |
291 | gld${EMULATION_NAME}_map_segments (need_laying_out); | |
deb04cdb | 292 | |
1049f94e | 293 | if (! link_info.relocatable) |
3231d22e | 294 | { |
836c6af1 | 295 | /* Set the global data pointer. */ |
f13a99db | 296 | if (! elf32_hppa_set_gp (link_info.output_bfd, &link_info)) |
836c6af1 AM |
297 | { |
298 | einfo ("%X%P: can not set gp\n"); | |
299 | return; | |
300 | } | |
3231d22e | 301 | |
836c6af1 | 302 | /* Now build the linker stubs. */ |
fd574c46 | 303 | if (stub_file != NULL && stub_file->the_bfd->sections != NULL) |
836c6af1 AM |
304 | { |
305 | if (! elf32_hppa_build_stubs (&link_info)) | |
deb04cdb | 306 | einfo ("%X%P: can not build stubs: %E\n"); |
836c6af1 | 307 | } |
4900fc06 AM |
308 | } |
309 | } | |
310 | ||
3231d22e AM |
311 | |
312 | /* Avoid processing the fake stub_file in vercheck, stat_needed and | |
313 | check_needed routines. */ | |
314 | ||
0c7a8e5a | 315 | static void (*real_func) (lang_input_statement_type *); |
3231d22e | 316 | |
0c7a8e5a | 317 | static void hppa_for_each_input_file_wrapper (lang_input_statement_type *l) |
3231d22e AM |
318 | { |
319 | if (l != stub_file) | |
320 | (*real_func) (l); | |
321 | } | |
322 | ||
323 | static void | |
0c7a8e5a | 324 | hppa_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) |
3231d22e AM |
325 | { |
326 | real_func = func; | |
327 | lang_for_each_input_file (&hppa_for_each_input_file_wrapper); | |
328 | } | |
329 | ||
330 | #define lang_for_each_input_file hppa_lang_for_each_input_file | |
331 | ||
252b5132 RH |
332 | EOF |
333 | ||
3231d22e AM |
334 | # Define some shell vars to insert bits of code into the standard elf |
335 | # parse_args and list_options functions. | |
336 | # | |
337 | PARSE_AND_LIST_PROLOGUE=' | |
338 | #define OPTION_MULTI_SUBSPACE 301 | |
47d89dba | 339 | #define OPTION_STUBGROUP_SIZE (OPTION_MULTI_SUBSPACE + 1) |
3231d22e AM |
340 | ' |
341 | ||
342 | PARSE_AND_LIST_LONGOPTS=' | |
47d89dba | 343 | { "multi-subspace", no_argument, NULL, OPTION_MULTI_SUBSPACE }, |
47d89dba | 344 | { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, |
3231d22e AM |
345 | ' |
346 | ||
347 | PARSE_AND_LIST_OPTIONS=' | |
348 | fprintf (file, _("\ | |
442996ee AM |
349 | --multi-subspace Generate import and export stubs to support\n\ |
350 | multiple sub-space shared libraries\n" | |
47d89dba AM |
351 | )); |
352 | fprintf (file, _("\ | |
442996ee AM |
353 | --stub-group-size=N Maximum size of a group of input sections that\n\ |
354 | can be handled by one stub section. A negative\n\ | |
355 | value locates all stubs before their branches\n\ | |
356 | (with a group size of -N), while a positive\n\ | |
357 | value allows two groups of input sections, one\n\ | |
358 | before, and one after each stub section.\n\ | |
359 | Values of +/-1 indicate the linker should\n\ | |
360 | choose suitable defaults.\n" | |
3231d22e AM |
361 | )); |
362 | ' | |
363 | ||
364 | PARSE_AND_LIST_ARGS_CASES=' | |
365 | case OPTION_MULTI_SUBSPACE: | |
366 | multi_subspace = 1; | |
367 | break; | |
47d89dba AM |
368 | |
369 | case OPTION_STUBGROUP_SIZE: | |
370 | { | |
371 | const char *end; | |
372 | group_size = bfd_scan_vma (optarg, &end, 0); | |
373 | if (*end) | |
374 | einfo (_("%P%F: invalid number `%s'\''\n"), optarg); | |
375 | } | |
376 | break; | |
3231d22e AM |
377 | ' |
378 | ||
379 | # Put these extra hppaelf routines in ld_${EMULATION_NAME}_emulation | |
41392f03 | 380 | # |
ffd6e9de | 381 | LDEMUL_AFTER_PARSE=hppaelf_after_parse |
eaeb0a9d | 382 | LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation |
41392f03 | 383 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements |