Commit | Line | Data |
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1f808cd5 | 1 | # This shell script emits a C file. -*- C -*- |
794e51c0 | 2 | # Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 |
74f0fb50 | 3 | # Free Software Foundation, Inc. |
1f808cd5 | 4 | # |
f96b4a7b | 5 | # This file is part of the GNU Binutils. |
1f808cd5 AM |
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 | |
f96b4a7b | 9 | # the Free Software Foundation; either version 3 of the License, or |
1f808cd5 AM |
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 | |
f96b4a7b NC |
19 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | # MA 02110-1301, USA. | |
1f808cd5 AM |
21 | # |
22 | ||
23 | # This file is sourced from elf32.em, and defines extra powerpc64-elf | |
24 | # specific routines. | |
25 | # | |
92b93329 | 26 | fragment <<EOF |
1f808cd5 | 27 | |
9c1d81c1 | 28 | #include "ldctor.h" |
805fc799 | 29 | #include "libbfd.h" |
83490352 | 30 | #include "elf-bfd.h" |
1f808cd5 | 31 | #include "elf64-ppc.h" |
f05eb3b7 | 32 | #include "ldlex.h" |
1f808cd5 | 33 | |
9c1d81c1 AM |
34 | /* Fake input file for stubs. */ |
35 | static lang_input_statement_type *stub_file; | |
68f8ff14 | 36 | static int stub_added = 0; |
9c1d81c1 | 37 | |
deb04cdb AM |
38 | /* Whether we need to call ppc_layout_sections_again. */ |
39 | static int need_laying_out = 0; | |
40 | ||
9c1d81c1 AM |
41 | /* Maximum size of a group of input sections that can be handled by |
42 | one stub section. A value of +/-1 indicates the bfd back-end | |
43 | should use a suitable default size. */ | |
44 | static bfd_signed_vma group_size = 1; | |
45 | ||
fac1652d AM |
46 | /* Whether to add ".foo" entries for each "foo" in a version script. */ |
47 | static int dotsyms = 1; | |
48 | ||
e5096e3f | 49 | /* Whether to run tls optimization. */ |
c5614fa4 | 50 | static int no_tls_opt = 0; |
a7f2871e | 51 | static int no_tls_get_addr_opt = 0; |
c5614fa4 AM |
52 | |
53 | /* Whether to run opd optimization. */ | |
54 | static int no_opd_opt = 0; | |
55 | ||
56 | /* Whether to run toc optimization. */ | |
57 | static int no_toc_opt = 0; | |
e5096e3f | 58 | |
4c52953f AM |
59 | /* Whether to allow multiple toc sections. */ |
60 | static int no_multi_toc = 0; | |
61 | ||
d43d0b53 AM |
62 | /* Whether to sort input toc and got sections. */ |
63 | static int no_toc_sort = 0; | |
64 | ||
9df0ef5f | 65 | /* Set if PLT call stubs should load r11. */ |
bd59d916 | 66 | static int plt_static_chain = ${DEFAULT_PLT_STATIC_CHAIN-0}; |
9df0ef5f | 67 | |
794e51c0 AM |
68 | /* Set if PLT call stubs need to be thread safe on power7+. */ |
69 | static int plt_thread_safe = -1; | |
70 | ||
71 | /* Set if individual PLT call stubs should be aligned. */ | |
72 | static int plt_stub_align = 0; | |
73 | ||
0b9a4d73 | 74 | /* Whether to emit symbols for stubs. */ |
b02c4cfa | 75 | static int emit_stub_syms = -1; |
0b9a4d73 AM |
76 | |
77 | static asection *toc_section = 0; | |
78 | ||
3f764659 JJ |
79 | /* Whether to canonicalize .opd so that there are no overlapping |
80 | .opd entries. */ | |
81 | static int non_overlapping_opd = 0; | |
9c1d81c1 AM |
82 | |
83 | /* This is called before the input files are opened. We create a new | |
84 | fake input file to hold the stub sections. */ | |
85 | ||
86 | static void | |
7d8a3a28 | 87 | ppc_create_output_section_statements (void) |
9c1d81c1 | 88 | { |
5503fea1 | 89 | if (!(bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour |
4dfe6ac6 | 90 | && elf_object_id (link_info.output_bfd) == PPC64_ELF_DATA)) |
a015f5ec AM |
91 | return; |
92 | ||
b9cf773d AM |
93 | link_info.wrap_char = '.'; |
94 | ||
9c1d81c1 AM |
95 | stub_file = lang_add_input_file ("linker stubs", |
96 | lang_input_file_is_fake_enum, | |
97 | NULL); | |
f13a99db | 98 | stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd); |
9c1d81c1 AM |
99 | if (stub_file->the_bfd == NULL |
100 | || !bfd_set_arch_mach (stub_file->the_bfd, | |
f13a99db AM |
101 | bfd_get_arch (link_info.output_bfd), |
102 | bfd_get_mach (link_info.output_bfd))) | |
9c1d81c1 | 103 | { |
f7c46796 | 104 | einfo ("%F%P: can not create BFD: %E\n"); |
9c1d81c1 AM |
105 | return; |
106 | } | |
107 | ||
d457dcf6 | 108 | stub_file->the_bfd->flags |= BFD_LINKER_CREATED; |
9c1d81c1 | 109 | ldlang_add_file (stub_file); |
bfeb4a28 AM |
110 | if (!ppc64_elf_init_stub_bfd (stub_file->the_bfd, &link_info)) |
111 | einfo ("%F%P: can not init BFD: %E\n"); | |
9c1d81c1 AM |
112 | } |
113 | ||
d43d0b53 AM |
114 | /* Move the input section statement at *U which happens to be on LIST |
115 | to be just before *TO. */ | |
116 | ||
117 | static void | |
118 | move_input_section (lang_statement_list_type *list, | |
119 | lang_statement_union_type **u, | |
120 | lang_statement_union_type **to) | |
121 | { | |
122 | lang_statement_union_type *s = *u; | |
123 | asection *i = s->input_section.section; | |
124 | asection *p, *n; | |
125 | ||
126 | /* Snip the input section from the statement list. If it was the | |
127 | last statement, fix the list tail pointer. */ | |
128 | *u = s->header.next; | |
129 | if (*u == NULL) | |
130 | list->tail = u; | |
131 | /* Add it back in the new position. */ | |
132 | s->header.next = *to; | |
133 | *to = s; | |
134 | if (list->tail == to) | |
135 | list->tail = &s->header.next; | |
136 | ||
137 | /* Trim I off the bfd map_head/map_tail doubly linked lists. */ | |
138 | n = i->map_head.s; | |
139 | p = i->map_tail.s; | |
140 | (p != NULL ? p : i->output_section)->map_head.s = n; | |
141 | (n != NULL ? n : i->output_section)->map_tail.s = p; | |
142 | ||
143 | /* Add I back on in its new position. */ | |
144 | if (s->header.next->header.type == lang_input_section_enum) | |
145 | { | |
146 | n = s->header.next->input_section.section; | |
147 | p = n->map_tail.s; | |
148 | } | |
149 | else | |
150 | { | |
151 | /* If the next statement is not an input section statement then | |
152 | TO must point at the previous input section statement | |
153 | header.next field. */ | |
154 | lang_input_section_type *prev = (lang_input_section_type *) | |
155 | ((char *) to - offsetof (lang_statement_union_type, header.next)); | |
156 | ||
157 | ASSERT (prev->header.type == lang_input_section_enum); | |
158 | p = prev->section; | |
159 | n = p->map_head.s; | |
160 | } | |
161 | i->map_head.s = n; | |
162 | i->map_tail.s = p; | |
163 | (p != NULL ? p : i->output_section)->map_head.s = i; | |
164 | (n != NULL ? n : i->output_section)->map_tail.s = i; | |
165 | } | |
166 | ||
167 | /* Sort input section statements in the linker script tree rooted at | |
168 | LIST so that those whose owning bfd happens to have a section | |
169 | called .init or .fini are placed first. Place any TOC sections | |
170 | referenced by small TOC relocs next, with TOC sections referenced | |
171 | only by bigtoc relocs last. */ | |
172 | ||
173 | static void | |
174 | sort_toc_sections (lang_statement_list_type *list, | |
175 | lang_statement_union_type **ini, | |
176 | lang_statement_union_type **small) | |
177 | { | |
178 | lang_statement_union_type *s, **u; | |
179 | asection *i; | |
180 | ||
181 | u = &list->head; | |
182 | while ((s = *u) != NULL) | |
183 | { | |
184 | switch (s->header.type) | |
185 | { | |
186 | case lang_wild_statement_enum: | |
187 | sort_toc_sections (&s->wild_statement.children, ini, small); | |
188 | break; | |
189 | ||
190 | case lang_group_statement_enum: | |
191 | sort_toc_sections (&s->group_statement.children, ini, small); | |
192 | break; | |
193 | ||
194 | case lang_input_section_enum: | |
195 | i = s->input_section.section; | |
196 | /* Leave the stub_file .got where it is. We put the .got | |
197 | header there. */ | |
198 | if (i->owner == stub_file->the_bfd) | |
199 | break; | |
200 | if (bfd_get_section_by_name (i->owner, ".init") != NULL | |
201 | || bfd_get_section_by_name (i->owner, ".fini") != NULL) | |
202 | { | |
203 | if (ini != NULL && *ini != s) | |
204 | { | |
205 | move_input_section (list, u, ini); | |
206 | if (small == ini) | |
207 | small = &s->header.next; | |
208 | ini = &s->header.next; | |
209 | continue; | |
210 | } | |
211 | if (small == ini) | |
212 | small = &s->header.next; | |
213 | ini = &s->header.next; | |
214 | break; | |
215 | } | |
216 | else if (ini == NULL) | |
217 | ini = u; | |
218 | ||
219 | if (ppc64_elf_has_small_toc_reloc (i)) | |
220 | { | |
221 | if (small != NULL && *small != s) | |
222 | { | |
223 | move_input_section (list, u, small); | |
224 | small = &s->header.next; | |
225 | continue; | |
226 | } | |
227 | small = &s->header.next; | |
228 | } | |
229 | else if (small == NULL) | |
230 | small = u; | |
231 | break; | |
232 | ||
233 | default: | |
234 | break; | |
235 | } | |
236 | u = &s->header.next; | |
237 | } | |
238 | } | |
239 | ||
ba761f19 AM |
240 | static void |
241 | prelim_size_sections (void) | |
242 | { | |
243 | if (expld.phase != lang_mark_phase_enum) | |
244 | { | |
245 | expld.phase = lang_mark_phase_enum; | |
246 | expld.dataseg.phase = exp_dataseg_none; | |
247 | one_lang_size_sections_pass (NULL, FALSE); | |
248 | /* We must not cache anything from the preliminary sizing. */ | |
249 | lang_reset_memory_regions (); | |
250 | } | |
251 | } | |
252 | ||
836c6af1 | 253 | static void |
7d8a3a28 | 254 | ppc_before_allocation (void) |
836c6af1 | 255 | { |
a015f5ec | 256 | if (stub_file != NULL) |
e0468e59 | 257 | { |
74f0fb50 | 258 | if (!no_opd_opt |
33c0ec9d | 259 | && !ppc64_elf_edit_opd (&link_info, non_overlapping_opd)) |
f7c46796 | 260 | einfo ("%X%P: can not edit %s: %E\n", "opd"); |
e5096e3f | 261 | |
33c0ec9d | 262 | if (ppc64_elf_tls_setup (&link_info, no_tls_get_addr_opt, &no_multi_toc) |
f13a99db | 263 | && !no_tls_opt) |
a015f5ec AM |
264 | { |
265 | /* Size the sections. This is premature, but we want to know the | |
266 | TLS segment layout so that certain optimizations can be done. */ | |
ba761f19 | 267 | prelim_size_sections (); |
a015f5ec | 268 | |
33c0ec9d | 269 | if (!ppc64_elf_tls_optimize (&link_info)) |
92b7a70f | 270 | einfo ("%X%P: TLS problem %E\n"); |
a015f5ec | 271 | } |
c5614fa4 AM |
272 | |
273 | if (!no_toc_opt | |
ba761f19 AM |
274 | && !link_info.relocatable) |
275 | { | |
276 | prelim_size_sections (); | |
277 | ||
278 | if (!ppc64_elf_edit_toc (&link_info)) | |
f7c46796 | 279 | einfo ("%X%P: can not edit %s: %E\n", "toc"); |
ba761f19 | 280 | } |
d43d0b53 AM |
281 | |
282 | if (!no_toc_sort) | |
283 | { | |
284 | lang_output_section_statement_type *toc_os; | |
285 | ||
286 | toc_os = lang_output_section_find (".got"); | |
287 | if (toc_os != NULL) | |
288 | sort_toc_sections (&toc_os->children, NULL, NULL); | |
289 | } | |
e0468e59 AM |
290 | } |
291 | ||
836c6af1 AM |
292 | gld${EMULATION_NAME}_before_allocation (); |
293 | } | |
294 | ||
9c1d81c1 AM |
295 | struct hook_stub_info |
296 | { | |
297 | lang_statement_list_type add; | |
298 | asection *input_section; | |
299 | }; | |
300 | ||
301 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
302 | ||
b34976b6 | 303 | static bfd_boolean |
7d8a3a28 | 304 | hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) |
9c1d81c1 AM |
305 | { |
306 | lang_statement_union_type *l; | |
b34976b6 | 307 | bfd_boolean ret; |
9c1d81c1 AM |
308 | |
309 | for (; (l = *lp) != NULL; lp = &l->header.next) | |
310 | { | |
311 | switch (l->header.type) | |
312 | { | |
313 | case lang_constructors_statement_enum: | |
314 | ret = hook_in_stub (info, &constructor_list.head); | |
315 | if (ret) | |
316 | return ret; | |
317 | break; | |
318 | ||
319 | case lang_output_section_statement_enum: | |
320 | ret = hook_in_stub (info, | |
321 | &l->output_section_statement.children.head); | |
322 | if (ret) | |
323 | return ret; | |
324 | break; | |
325 | ||
326 | case lang_wild_statement_enum: | |
327 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
328 | if (ret) | |
329 | return ret; | |
330 | break; | |
331 | ||
332 | case lang_group_statement_enum: | |
333 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
334 | if (ret) | |
335 | return ret; | |
336 | break; | |
337 | ||
338 | case lang_input_section_enum: | |
339 | if (l->input_section.section == info->input_section) | |
340 | { | |
341 | /* We've found our section. Insert the stub immediately | |
342 | before its associated input section. */ | |
343 | *lp = info->add.head; | |
344 | *(info->add.tail) = l; | |
b34976b6 | 345 | return TRUE; |
9c1d81c1 AM |
346 | } |
347 | break; | |
348 | ||
349 | case lang_data_statement_enum: | |
350 | case lang_reloc_statement_enum: | |
351 | case lang_object_symbols_statement_enum: | |
352 | case lang_output_statement_enum: | |
353 | case lang_target_statement_enum: | |
354 | case lang_input_statement_enum: | |
355 | case lang_assignment_statement_enum: | |
356 | case lang_padding_statement_enum: | |
357 | case lang_address_statement_enum: | |
358 | case lang_fill_statement_enum: | |
359 | break; | |
360 | ||
361 | default: | |
362 | FAIL (); | |
363 | break; | |
364 | } | |
365 | } | |
b34976b6 | 366 | return FALSE; |
9c1d81c1 AM |
367 | } |
368 | ||
369 | ||
370 | /* Call-back for ppc64_elf_size_stubs. */ | |
371 | ||
372 | /* Create a new stub section, and arrange for it to be linked | |
373 | immediately before INPUT_SECTION. */ | |
374 | ||
375 | static asection * | |
7d8a3a28 | 376 | ppc_add_stub_section (const char *stub_sec_name, asection *input_section) |
9c1d81c1 AM |
377 | { |
378 | asection *stub_sec; | |
379 | flagword flags; | |
380 | asection *output_section; | |
381 | const char *secname; | |
382 | lang_output_section_statement_type *os; | |
383 | struct hook_stub_info info; | |
384 | ||
9c1d81c1 | 385 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE |
e4e0193e | 386 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP); |
9795b468 AM |
387 | stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd, |
388 | stub_sec_name, flags); | |
bd518033 | 389 | if (stub_sec == NULL |
794e51c0 AM |
390 | || !bfd_set_section_alignment (stub_file->the_bfd, stub_sec, |
391 | plt_stub_align > 5 ? plt_stub_align : 5)) | |
9c1d81c1 AM |
392 | goto err_ret; |
393 | ||
394 | output_section = input_section->output_section; | |
395 | secname = bfd_get_section_name (output_section->owner, output_section); | |
396 | os = lang_output_section_find (secname); | |
397 | ||
398 | info.input_section = input_section; | |
399 | lang_list_init (&info.add); | |
b9c361e0 | 400 | lang_add_section (&info.add, stub_sec, NULL, os); |
9c1d81c1 AM |
401 | |
402 | if (info.add.head == NULL) | |
403 | goto err_ret; | |
404 | ||
68f8ff14 | 405 | stub_added = 1; |
9c1d81c1 AM |
406 | if (hook_in_stub (&info, &os->children.head)) |
407 | return stub_sec; | |
408 | ||
409 | err_ret: | |
410 | einfo ("%X%P: can not make stub section: %E\n"); | |
411 | return NULL; | |
412 | } | |
413 | ||
414 | ||
415 | /* Another call-back for ppc64_elf_size_stubs. */ | |
416 | ||
417 | static void | |
7d8a3a28 | 418 | ppc_layout_sections_again (void) |
9c1d81c1 AM |
419 | { |
420 | /* If we have changed sizes of the stub sections, then we need | |
421 | to recalculate all the section offsets. This may mean we need to | |
422 | add even more stubs. */ | |
8ded5a0f | 423 | gld${EMULATION_NAME}_map_segments (TRUE); |
1f808cd5 | 424 | |
1049f94e | 425 | if (!link_info.relocatable) |
1c865ab2 | 426 | ppc64_elf_set_toc (&link_info, link_info.output_bfd); |
eaeb0a9d AM |
427 | |
428 | need_laying_out = -1; | |
1f808cd5 AM |
429 | } |
430 | ||
9c1d81c1 | 431 | |
0b9a4d73 | 432 | static void |
7d8a3a28 | 433 | build_toc_list (lang_statement_union_type *statement) |
0b9a4d73 | 434 | { |
7b986e99 AM |
435 | if (statement->header.type == lang_input_section_enum) |
436 | { | |
437 | asection *i = statement->input_section.section; | |
438 | ||
dbaa2011 | 439 | if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS |
7b986e99 AM |
440 | && (i->flags & SEC_EXCLUDE) == 0 |
441 | && i->output_section == toc_section) | |
927be08e AM |
442 | { |
443 | if (!ppc64_elf_next_toc_section (&link_info, i)) | |
444 | einfo ("%X%P: linker script separates .got and .toc\n"); | |
445 | } | |
7b986e99 | 446 | } |
0b9a4d73 AM |
447 | } |
448 | ||
449 | ||
9c1d81c1 | 450 | static void |
7d8a3a28 | 451 | build_section_lists (lang_statement_union_type *statement) |
9c1d81c1 | 452 | { |
7b986e99 | 453 | if (statement->header.type == lang_input_section_enum) |
9c1d81c1 | 454 | { |
7b986e99 AM |
455 | asection *i = statement->input_section.section; |
456 | ||
66be1055 | 457 | if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms |
7b986e99 AM |
458 | && (i->flags & SEC_EXCLUDE) == 0 |
459 | && i->output_section != NULL | |
f13a99db | 460 | && i->output_section->owner == link_info.output_bfd) |
7b986e99 AM |
461 | { |
462 | if (!ppc64_elf_next_input_section (&link_info, i)) | |
463 | einfo ("%X%P: can not size stub section: %E\n"); | |
464 | } | |
9c1d81c1 AM |
465 | } |
466 | } | |
467 | ||
fac1652d | 468 | |
eaeb0a9d AM |
469 | /* Call the back-end function to set TOC base after we have placed all |
470 | the sections. */ | |
1f808cd5 | 471 | static void |
eaeb0a9d | 472 | gld${EMULATION_NAME}_after_allocation (void) |
1f808cd5 | 473 | { |
eaeb0a9d AM |
474 | /* bfd_elf_discard_info just plays with data and debugging sections, |
475 | ie. doesn't affect code size, so we can delay resizing the | |
deb04cdb AM |
476 | sections. It's likely we'll resize everything in the process of |
477 | adding stubs. */ | |
f13a99db | 478 | if (bfd_elf_discard_info (link_info.output_bfd, &link_info)) |
deb04cdb AM |
479 | need_laying_out = 1; |
480 | ||
836c6af1 AM |
481 | /* If generating a relocatable output file, then we don't have any |
482 | stubs. */ | |
1049f94e | 483 | if (stub_file != NULL && !link_info.relocatable) |
1f808cd5 | 484 | { |
927be08e AM |
485 | int ret = ppc64_elf_setup_section_lists (&link_info, |
486 | &ppc_add_stub_section, | |
487 | &ppc_layout_sections_again); | |
92b7a70f AM |
488 | if (ret < 0) |
489 | einfo ("%X%P: can not size stub section: %E\n"); | |
490 | else if (ret > 0) | |
9c1d81c1 | 491 | { |
927be08e AM |
492 | ppc64_elf_start_multitoc_partition (&link_info); |
493 | ||
494 | if (!no_multi_toc) | |
495 | { | |
496 | toc_section = bfd_get_section_by_name (link_info.output_bfd, | |
497 | ".got"); | |
498 | if (toc_section != NULL) | |
499 | lang_for_each_statement (build_toc_list); | |
500 | } | |
501 | ||
502 | if (ppc64_elf_layout_multitoc (&link_info) | |
503 | && !no_multi_toc | |
504 | && toc_section != NULL) | |
0b9a4d73 AM |
505 | lang_for_each_statement (build_toc_list); |
506 | ||
927be08e | 507 | ppc64_elf_finish_multitoc_partition (&link_info); |
0b9a4d73 | 508 | |
836c6af1 | 509 | lang_for_each_statement (build_section_lists); |
9c1d81c1 | 510 | |
70cc837d AM |
511 | if (!ppc64_elf_check_init_fini (&link_info)) |
512 | einfo ("%P: .init/.fini fragments use differing TOC pointers\n"); | |
513 | ||
836c6af1 | 514 | /* Call into the BFD backend to do the real work. */ |
794e51c0 AM |
515 | if (!ppc64_elf_size_stubs (&link_info, group_size, |
516 | plt_static_chain, plt_thread_safe, | |
517 | plt_stub_align)) | |
92b7a70f | 518 | einfo ("%X%P: can not size stub section: %E\n"); |
1f808cd5 | 519 | } |
9c1d81c1 | 520 | } |
1f808cd5 | 521 | |
8ded5a0f | 522 | if (need_laying_out != -1) |
eaeb0a9d AM |
523 | { |
524 | gld${EMULATION_NAME}_map_segments (need_laying_out); | |
525 | ||
526 | if (!link_info.relocatable) | |
1c865ab2 | 527 | ppc64_elf_set_toc (&link_info, link_info.output_bfd); |
eaeb0a9d AM |
528 | } |
529 | } | |
530 | ||
531 | ||
532 | /* Final emulation specific call. */ | |
533 | ||
534 | static void | |
535 | gld${EMULATION_NAME}_finish (void) | |
536 | { | |
537 | /* e_entry on PowerPC64 points to the function descriptor for | |
538 | _start. If _start is missing, default to the first function | |
539 | descriptor in the .opd section. */ | |
540 | entry_section = ".opd"; | |
deb04cdb | 541 | |
68f8ff14 | 542 | if (stub_added) |
9c1d81c1 | 543 | { |
bda6c678 AM |
544 | char *msg = NULL; |
545 | char *line, *endline; | |
546 | ||
b02c4cfa AM |
547 | if (emit_stub_syms < 0) |
548 | emit_stub_syms = 1; | |
bda6c678 AM |
549 | if (!ppc64_elf_build_stubs (emit_stub_syms, &link_info, |
550 | config.stats ? &msg : NULL)) | |
9c1d81c1 | 551 | einfo ("%X%P: can not build stubs: %E\n"); |
bda6c678 | 552 | |
e922bcab | 553 | fflush (stdout); |
bda6c678 AM |
554 | for (line = msg; line != NULL; line = endline) |
555 | { | |
556 | endline = strchr (line, '\n'); | |
557 | if (endline != NULL) | |
558 | *endline++ = '\0'; | |
559 | fprintf (stderr, "%s: %s\n", program_name, line); | |
560 | } | |
e922bcab | 561 | fflush (stderr); |
bda6c678 AM |
562 | if (msg != NULL) |
563 | free (msg); | |
9c1d81c1 | 564 | } |
99877b66 AM |
565 | |
566 | ppc64_elf_restore_symbols (&link_info); | |
1e035701 | 567 | finish_default (); |
9c1d81c1 | 568 | } |
1f808cd5 | 569 | |
76dc39fe | 570 | |
fac1652d AM |
571 | /* Add a pattern matching ".foo" for every "foo" in a version script. |
572 | ||
573 | The reason for doing this is that many shared library version | |
574 | scripts export a selected set of functions or data symbols, forcing | |
575 | others local. eg. | |
576 | ||
577 | . VERS_1 { | |
578 | . global: | |
579 | . this; that; some; thing; | |
580 | . local: | |
581 | . *; | |
582 | . }; | |
583 | ||
584 | To make the above work for PowerPC64, we need to export ".this", | |
585 | ".that" and so on, otherwise only the function descriptor syms are | |
586 | exported. Lack of an exported function code sym may cause a | |
587 | definition to be pulled in from a static library. */ | |
588 | ||
7d8a3a28 AM |
589 | static struct bfd_elf_version_expr * |
590 | gld${EMULATION_NAME}_new_vers_pattern (struct bfd_elf_version_expr *entry) | |
fac1652d AM |
591 | { |
592 | struct bfd_elf_version_expr *dot_entry; | |
fac1652d AM |
593 | unsigned int len; |
594 | char *dot_pat; | |
595 | ||
b7b7fe3f | 596 | if (!dotsyms |
ae5a3597 AM |
597 | || entry->pattern[0] == '.' |
598 | || (!entry->literal && entry->pattern[0] == '*')) | |
fac1652d AM |
599 | return entry; |
600 | ||
7d8a3a28 | 601 | dot_entry = xmalloc (sizeof *dot_entry); |
108ba305 | 602 | *dot_entry = *entry; |
fac1652d | 603 | dot_entry->next = entry; |
ae5a3597 AM |
604 | len = strlen (entry->pattern) + 2; |
605 | dot_pat = xmalloc (len); | |
606 | dot_pat[0] = '.'; | |
607 | memcpy (dot_pat + 1, entry->pattern, len - 1); | |
608 | dot_entry->pattern = dot_pat; | |
71755fdf | 609 | dot_entry->script = 1; |
fac1652d AM |
610 | return dot_entry; |
611 | } | |
612 | ||
613 | ||
9c1d81c1 AM |
614 | /* Avoid processing the fake stub_file in vercheck, stat_needed and |
615 | check_needed routines. */ | |
1f808cd5 | 616 | |
7d8a3a28 | 617 | static void (*real_func) (lang_input_statement_type *); |
1f808cd5 | 618 | |
7d8a3a28 | 619 | static void ppc_for_each_input_file_wrapper (lang_input_statement_type *l) |
9c1d81c1 AM |
620 | { |
621 | if (l != stub_file) | |
622 | (*real_func) (l); | |
1f808cd5 | 623 | } |
9c1d81c1 AM |
624 | |
625 | static void | |
7d8a3a28 | 626 | ppc_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) |
9c1d81c1 AM |
627 | { |
628 | real_func = func; | |
629 | lang_for_each_input_file (&ppc_for_each_input_file_wrapper); | |
630 | } | |
631 | ||
632 | #define lang_for_each_input_file ppc_lang_for_each_input_file | |
633 | ||
1f808cd5 AM |
634 | EOF |
635 | ||
dc27aea4 | 636 | if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then |
92b93329 | 637 | fragment <<EOF |
dc27aea4 AM |
638 | /* Special handling for embedded SPU executables. */ |
639 | extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *); | |
640 | static bfd_boolean gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *); | |
641 | ||
642 | static bfd_boolean | |
643 | ppc64_recognized_file (lang_input_statement_type *entry) | |
644 | { | |
645 | if (embedded_spu_file (entry, "-m64")) | |
646 | return TRUE; | |
647 | ||
648 | return gld${EMULATION_NAME}_load_symbols (entry); | |
649 | } | |
650 | EOF | |
651 | LDEMUL_RECOGNIZED_FILE=ppc64_recognized_file | |
652 | fi | |
653 | ||
9c1d81c1 AM |
654 | # Define some shell vars to insert bits of code into the standard elf |
655 | # parse_args and list_options functions. | |
656 | # | |
58d180e8 AM |
657 | PARSE_AND_LIST_PROLOGUE=${PARSE_AND_LIST_PROLOGUE}' |
658 | #define OPTION_STUBGROUP_SIZE 321 | |
9df0ef5f AM |
659 | #define OPTION_PLT_STATIC_CHAIN (OPTION_STUBGROUP_SIZE + 1) |
660 | #define OPTION_NO_PLT_STATIC_CHAIN (OPTION_PLT_STATIC_CHAIN + 1) | |
794e51c0 AM |
661 | #define OPTION_PLT_THREAD_SAFE (OPTION_NO_PLT_STATIC_CHAIN + 1) |
662 | #define OPTION_NO_PLT_THREAD_SAFE (OPTION_PLT_THREAD_SAFE + 1) | |
663 | #define OPTION_PLT_ALIGN (OPTION_NO_PLT_THREAD_SAFE + 1) | |
664 | #define OPTION_NO_PLT_ALIGN (OPTION_PLT_ALIGN + 1) | |
665 | #define OPTION_STUBSYMS (OPTION_NO_PLT_ALIGN + 1) | |
b02c4cfa AM |
666 | #define OPTION_NO_STUBSYMS (OPTION_STUBSYMS + 1) |
667 | #define OPTION_DOTSYMS (OPTION_NO_STUBSYMS + 1) | |
fac1652d | 668 | #define OPTION_NO_DOTSYMS (OPTION_DOTSYMS + 1) |
e5096e3f | 669 | #define OPTION_NO_TLS_OPT (OPTION_NO_DOTSYMS + 1) |
a7f2871e AM |
670 | #define OPTION_NO_TLS_GET_ADDR_OPT (OPTION_NO_TLS_OPT + 1) |
671 | #define OPTION_NO_OPD_OPT (OPTION_NO_TLS_GET_ADDR_OPT + 1) | |
c5614fa4 | 672 | #define OPTION_NO_TOC_OPT (OPTION_NO_OPD_OPT + 1) |
4c52953f | 673 | #define OPTION_NO_MULTI_TOC (OPTION_NO_TOC_OPT + 1) |
d43d0b53 AM |
674 | #define OPTION_NO_TOC_SORT (OPTION_NO_MULTI_TOC + 1) |
675 | #define OPTION_NON_OVERLAPPING_OPD (OPTION_NO_TOC_SORT + 1) | |
9c1d81c1 AM |
676 | ' |
677 | ||
58d180e8 | 678 | PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}' |
9c1d81c1 | 679 | { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, |
9df0ef5f AM |
680 | { "plt-static-chain", no_argument, NULL, OPTION_PLT_STATIC_CHAIN }, |
681 | { "no-plt-static-chain", no_argument, NULL, OPTION_NO_PLT_STATIC_CHAIN }, | |
794e51c0 AM |
682 | { "plt-thread-safe", no_argument, NULL, OPTION_PLT_THREAD_SAFE }, |
683 | { "no-plt-thread-safe", no_argument, NULL, OPTION_NO_PLT_THREAD_SAFE }, | |
684 | { "plt-align", optional_argument, NULL, OPTION_PLT_ALIGN }, | |
685 | { "no-plt-align", no_argument, NULL, OPTION_NO_PLT_ALIGN }, | |
0b9a4d73 | 686 | { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS }, |
b02c4cfa | 687 | { "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS }, |
fac1652d AM |
688 | { "dotsyms", no_argument, NULL, OPTION_DOTSYMS }, |
689 | { "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS }, | |
e5096e3f | 690 | { "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT }, |
a7f2871e | 691 | { "no-tls-get-addr-optimize", no_argument, NULL, OPTION_NO_TLS_GET_ADDR_OPT }, |
c5614fa4 AM |
692 | { "no-opd-optimize", no_argument, NULL, OPTION_NO_OPD_OPT }, |
693 | { "no-toc-optimize", no_argument, NULL, OPTION_NO_TOC_OPT }, | |
4c52953f | 694 | { "no-multi-toc", no_argument, NULL, OPTION_NO_MULTI_TOC }, |
d43d0b53 | 695 | { "no-toc-sort", no_argument, NULL, OPTION_NO_TOC_SORT }, |
3f764659 | 696 | { "non-overlapping-opd", no_argument, NULL, OPTION_NON_OVERLAPPING_OPD }, |
9c1d81c1 AM |
697 | ' |
698 | ||
58d180e8 | 699 | PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}' |
9c1d81c1 | 700 | fprintf (file, _("\ |
442996ee AM |
701 | --stub-group-size=N Maximum size of a group of input sections that\n\ |
702 | can be handled by one stub section. A negative\n\ | |
703 | value locates all stubs before their branches\n\ | |
704 | (with a group size of -N), while a positive\n\ | |
705 | value allows two groups of input sections, one\n\ | |
706 | before, and one after each stub section.\n\ | |
707 | Values of +/-1 indicate the linker should\n\ | |
708 | choose suitable defaults.\n" | |
9c1d81c1 | 709 | )); |
fac1652d | 710 | fprintf (file, _("\ |
794e51c0 AM |
711 | --plt-static-chain PLT call stubs should load r11.${DEFAULT_PLT_STATIC_CHAIN- (default)}\n" |
712 | )); | |
713 | fprintf (file, _("\ | |
714 | --no-plt-static-chain PLT call stubs should not load r11.${DEFAULT_PLT_STATIC_CHAIN+ (default)}\n" | |
715 | )); | |
716 | fprintf (file, _("\ | |
717 | --plt-thread-safe PLT call stubs with load-load barrier.\n" | |
718 | )); | |
719 | fprintf (file, _("\ | |
720 | --no-plt-thread-safe PLT call stubs without barrier.\n" | |
721 | )); | |
722 | fprintf (file, _("\ | |
723 | --plt-align [=<align>] Align PLT call stubs to fit cache lines.\n" | |
9df0ef5f AM |
724 | )); |
725 | fprintf (file, _("\ | |
794e51c0 | 726 | --no-plt-align Dont'\''t align individual PLT call stubs.\n" |
9df0ef5f AM |
727 | )); |
728 | fprintf (file, _("\ | |
442996ee | 729 | --emit-stub-syms Label linker stubs with a symbol.\n" |
0b9a4d73 AM |
730 | )); |
731 | fprintf (file, _("\ | |
b02c4cfa AM |
732 | --no-emit-stub-syms Don'\''t label linker stubs with a symbol.\n" |
733 | )); | |
734 | fprintf (file, _("\ | |
442996ee AM |
735 | --dotsyms For every version pattern \"foo\" in a version\n\ |
736 | script, add \".foo\" so that function code\n\ | |
737 | symbols are treated the same as function\n\ | |
738 | descriptor symbols. Defaults to on.\n" | |
fac1652d AM |
739 | )); |
740 | fprintf (file, _("\ | |
442996ee | 741 | --no-dotsyms Don'\''t do anything special in version scripts.\n" |
fac1652d | 742 | )); |
e5096e3f | 743 | fprintf (file, _("\ |
442996ee | 744 | --no-tls-optimize Don'\''t try to optimize TLS accesses.\n" |
e5096e3f | 745 | )); |
3f764659 | 746 | fprintf (file, _("\ |
a7f2871e AM |
747 | --no-tls-get-addr-optimize Don'\''t use a special __tls_get_addr call.\n" |
748 | )); | |
749 | fprintf (file, _("\ | |
442996ee | 750 | --no-opd-optimize Don'\''t optimize the OPD section.\n" |
c5614fa4 AM |
751 | )); |
752 | fprintf (file, _("\ | |
442996ee | 753 | --no-toc-optimize Don'\''t optimize the TOC section.\n" |
c5614fa4 AM |
754 | )); |
755 | fprintf (file, _("\ | |
442996ee | 756 | --no-multi-toc Disallow automatic multiple toc sections.\n" |
4c52953f AM |
757 | )); |
758 | fprintf (file, _("\ | |
d43d0b53 AM |
759 | --no-toc-sort Don'\''t sort TOC and GOT sections.\n" |
760 | )); | |
761 | fprintf (file, _("\ | |
442996ee AM |
762 | --non-overlapping-opd Canonicalize .opd, so that there are no\n\ |
763 | overlapping .opd entries.\n" | |
3f764659 | 764 | )); |
9c1d81c1 AM |
765 | ' |
766 | ||
58d180e8 | 767 | PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}' |
9c1d81c1 AM |
768 | case OPTION_STUBGROUP_SIZE: |
769 | { | |
770 | const char *end; | |
771 | group_size = bfd_scan_vma (optarg, &end, 0); | |
772 | if (*end) | |
773 | einfo (_("%P%F: invalid number `%s'\''\n"), optarg); | |
774 | } | |
775 | break; | |
fac1652d | 776 | |
9df0ef5f AM |
777 | case OPTION_PLT_STATIC_CHAIN: |
778 | plt_static_chain = 1; | |
779 | break; | |
780 | ||
781 | case OPTION_NO_PLT_STATIC_CHAIN: | |
782 | plt_static_chain = 0; | |
783 | break; | |
784 | ||
794e51c0 AM |
785 | case OPTION_PLT_THREAD_SAFE: |
786 | plt_thread_safe = 1; | |
787 | break; | |
788 | ||
789 | case OPTION_NO_PLT_THREAD_SAFE: | |
790 | plt_thread_safe = 0; | |
791 | break; | |
792 | ||
793 | case OPTION_PLT_ALIGN: | |
794 | if (optarg != NULL) | |
795 | { | |
796 | char *end; | |
797 | unsigned long val = strtoul (optarg, &end, 0); | |
798 | if (*end || val > 8) | |
799 | einfo (_("%P%F: invalid --plt-align `%s'\''\n"), optarg); | |
800 | plt_stub_align = val; | |
801 | } | |
802 | else | |
803 | plt_stub_align = 5; | |
804 | break; | |
805 | ||
806 | case OPTION_NO_PLT_ALIGN: | |
807 | plt_stub_align = 0; | |
808 | break; | |
809 | ||
0b9a4d73 AM |
810 | case OPTION_STUBSYMS: |
811 | emit_stub_syms = 1; | |
812 | break; | |
813 | ||
b02c4cfa AM |
814 | case OPTION_NO_STUBSYMS: |
815 | emit_stub_syms = 0; | |
816 | break; | |
817 | ||
fac1652d | 818 | case OPTION_DOTSYMS: |
e5096e3f | 819 | dotsyms = 1; |
fac1652d AM |
820 | break; |
821 | ||
822 | case OPTION_NO_DOTSYMS: | |
e5096e3f AM |
823 | dotsyms = 0; |
824 | break; | |
825 | ||
826 | case OPTION_NO_TLS_OPT: | |
c5614fa4 AM |
827 | no_tls_opt = 1; |
828 | break; | |
829 | ||
a7f2871e AM |
830 | case OPTION_NO_TLS_GET_ADDR_OPT: |
831 | no_tls_get_addr_opt = 1; | |
832 | break; | |
833 | ||
c5614fa4 AM |
834 | case OPTION_NO_OPD_OPT: |
835 | no_opd_opt = 1; | |
836 | break; | |
837 | ||
838 | case OPTION_NO_TOC_OPT: | |
839 | no_toc_opt = 1; | |
fac1652d | 840 | break; |
3f764659 | 841 | |
4c52953f AM |
842 | case OPTION_NO_MULTI_TOC: |
843 | no_multi_toc = 1; | |
844 | break; | |
845 | ||
d43d0b53 AM |
846 | case OPTION_NO_TOC_SORT: |
847 | no_toc_sort = 1; | |
848 | break; | |
849 | ||
3f764659 JJ |
850 | case OPTION_NON_OVERLAPPING_OPD: |
851 | non_overlapping_opd = 1; | |
852 | break; | |
f05eb3b7 AM |
853 | |
854 | case OPTION_TRADITIONAL_FORMAT: | |
855 | no_tls_opt = 1; | |
856 | no_tls_get_addr_opt = 1; | |
857 | no_opd_opt = 1; | |
858 | no_toc_opt = 1; | |
859 | no_multi_toc = 1; | |
860 | no_toc_sort = 1; | |
861 | plt_static_chain = 1; | |
862 | return FALSE; | |
9c1d81c1 AM |
863 | ' |
864 | ||
1f808cd5 AM |
865 | # Put these extra ppc64elf routines in ld_${EMULATION_NAME}_emulation |
866 | # | |
836c6af1 | 867 | LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation |
1f808cd5 | 868 | LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation |
8ded5a0f | 869 | LDEMUL_FINISH=gld${EMULATION_NAME}_finish |
9c1d81c1 | 870 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_create_output_section_statements |
fac1652d | 871 | LDEMUL_NEW_VERS_PATTERN=gld${EMULATION_NAME}_new_vers_pattern |