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); |
68f8ff14 | 110 | ppc64_elf_init_stub_bfd (stub_file->the_bfd, &link_info); |
9c1d81c1 AM |
111 | } |
112 | ||
d43d0b53 AM |
113 | /* Move the input section statement at *U which happens to be on LIST |
114 | to be just before *TO. */ | |
115 | ||
116 | static void | |
117 | move_input_section (lang_statement_list_type *list, | |
118 | lang_statement_union_type **u, | |
119 | lang_statement_union_type **to) | |
120 | { | |
121 | lang_statement_union_type *s = *u; | |
122 | asection *i = s->input_section.section; | |
123 | asection *p, *n; | |
124 | ||
125 | /* Snip the input section from the statement list. If it was the | |
126 | last statement, fix the list tail pointer. */ | |
127 | *u = s->header.next; | |
128 | if (*u == NULL) | |
129 | list->tail = u; | |
130 | /* Add it back in the new position. */ | |
131 | s->header.next = *to; | |
132 | *to = s; | |
133 | if (list->tail == to) | |
134 | list->tail = &s->header.next; | |
135 | ||
136 | /* Trim I off the bfd map_head/map_tail doubly linked lists. */ | |
137 | n = i->map_head.s; | |
138 | p = i->map_tail.s; | |
139 | (p != NULL ? p : i->output_section)->map_head.s = n; | |
140 | (n != NULL ? n : i->output_section)->map_tail.s = p; | |
141 | ||
142 | /* Add I back on in its new position. */ | |
143 | if (s->header.next->header.type == lang_input_section_enum) | |
144 | { | |
145 | n = s->header.next->input_section.section; | |
146 | p = n->map_tail.s; | |
147 | } | |
148 | else | |
149 | { | |
150 | /* If the next statement is not an input section statement then | |
151 | TO must point at the previous input section statement | |
152 | header.next field. */ | |
153 | lang_input_section_type *prev = (lang_input_section_type *) | |
154 | ((char *) to - offsetof (lang_statement_union_type, header.next)); | |
155 | ||
156 | ASSERT (prev->header.type == lang_input_section_enum); | |
157 | p = prev->section; | |
158 | n = p->map_head.s; | |
159 | } | |
160 | i->map_head.s = n; | |
161 | i->map_tail.s = p; | |
162 | (p != NULL ? p : i->output_section)->map_head.s = i; | |
163 | (n != NULL ? n : i->output_section)->map_tail.s = i; | |
164 | } | |
165 | ||
166 | /* Sort input section statements in the linker script tree rooted at | |
167 | LIST so that those whose owning bfd happens to have a section | |
168 | called .init or .fini are placed first. Place any TOC sections | |
169 | referenced by small TOC relocs next, with TOC sections referenced | |
170 | only by bigtoc relocs last. */ | |
171 | ||
172 | static void | |
173 | sort_toc_sections (lang_statement_list_type *list, | |
174 | lang_statement_union_type **ini, | |
175 | lang_statement_union_type **small) | |
176 | { | |
177 | lang_statement_union_type *s, **u; | |
178 | asection *i; | |
179 | ||
180 | u = &list->head; | |
181 | while ((s = *u) != NULL) | |
182 | { | |
183 | switch (s->header.type) | |
184 | { | |
185 | case lang_wild_statement_enum: | |
186 | sort_toc_sections (&s->wild_statement.children, ini, small); | |
187 | break; | |
188 | ||
189 | case lang_group_statement_enum: | |
190 | sort_toc_sections (&s->group_statement.children, ini, small); | |
191 | break; | |
192 | ||
193 | case lang_input_section_enum: | |
194 | i = s->input_section.section; | |
195 | /* Leave the stub_file .got where it is. We put the .got | |
196 | header there. */ | |
197 | if (i->owner == stub_file->the_bfd) | |
198 | break; | |
199 | if (bfd_get_section_by_name (i->owner, ".init") != NULL | |
200 | || bfd_get_section_by_name (i->owner, ".fini") != NULL) | |
201 | { | |
202 | if (ini != NULL && *ini != s) | |
203 | { | |
204 | move_input_section (list, u, ini); | |
205 | if (small == ini) | |
206 | small = &s->header.next; | |
207 | ini = &s->header.next; | |
208 | continue; | |
209 | } | |
210 | if (small == ini) | |
211 | small = &s->header.next; | |
212 | ini = &s->header.next; | |
213 | break; | |
214 | } | |
215 | else if (ini == NULL) | |
216 | ini = u; | |
217 | ||
218 | if (ppc64_elf_has_small_toc_reloc (i)) | |
219 | { | |
220 | if (small != NULL && *small != s) | |
221 | { | |
222 | move_input_section (list, u, small); | |
223 | small = &s->header.next; | |
224 | continue; | |
225 | } | |
226 | small = &s->header.next; | |
227 | } | |
228 | else if (small == NULL) | |
229 | small = u; | |
230 | break; | |
231 | ||
232 | default: | |
233 | break; | |
234 | } | |
235 | u = &s->header.next; | |
236 | } | |
237 | } | |
238 | ||
ba761f19 AM |
239 | static void |
240 | prelim_size_sections (void) | |
241 | { | |
242 | if (expld.phase != lang_mark_phase_enum) | |
243 | { | |
244 | expld.phase = lang_mark_phase_enum; | |
245 | expld.dataseg.phase = exp_dataseg_none; | |
246 | one_lang_size_sections_pass (NULL, FALSE); | |
247 | /* We must not cache anything from the preliminary sizing. */ | |
248 | lang_reset_memory_regions (); | |
249 | } | |
250 | } | |
251 | ||
836c6af1 | 252 | static void |
7d8a3a28 | 253 | ppc_before_allocation (void) |
836c6af1 | 254 | { |
a015f5ec | 255 | if (stub_file != NULL) |
e0468e59 | 256 | { |
74f0fb50 | 257 | if (!no_opd_opt |
33c0ec9d | 258 | && !ppc64_elf_edit_opd (&link_info, non_overlapping_opd)) |
f7c46796 | 259 | einfo ("%X%P: can not edit %s: %E\n", "opd"); |
e5096e3f | 260 | |
33c0ec9d | 261 | if (ppc64_elf_tls_setup (&link_info, no_tls_get_addr_opt, &no_multi_toc) |
f13a99db | 262 | && !no_tls_opt) |
a015f5ec AM |
263 | { |
264 | /* Size the sections. This is premature, but we want to know the | |
265 | TLS segment layout so that certain optimizations can be done. */ | |
ba761f19 | 266 | prelim_size_sections (); |
a015f5ec | 267 | |
33c0ec9d | 268 | if (!ppc64_elf_tls_optimize (&link_info)) |
92b7a70f | 269 | einfo ("%X%P: TLS problem %E\n"); |
a015f5ec | 270 | } |
c5614fa4 AM |
271 | |
272 | if (!no_toc_opt | |
ba761f19 AM |
273 | && !link_info.relocatable) |
274 | { | |
275 | prelim_size_sections (); | |
276 | ||
277 | if (!ppc64_elf_edit_toc (&link_info)) | |
f7c46796 | 278 | einfo ("%X%P: can not edit %s: %E\n", "toc"); |
ba761f19 | 279 | } |
d43d0b53 AM |
280 | |
281 | if (!no_toc_sort) | |
282 | { | |
283 | lang_output_section_statement_type *toc_os; | |
284 | ||
285 | toc_os = lang_output_section_find (".got"); | |
286 | if (toc_os != NULL) | |
287 | sort_toc_sections (&toc_os->children, NULL, NULL); | |
288 | } | |
e0468e59 AM |
289 | } |
290 | ||
836c6af1 AM |
291 | gld${EMULATION_NAME}_before_allocation (); |
292 | } | |
293 | ||
9c1d81c1 AM |
294 | struct hook_stub_info |
295 | { | |
296 | lang_statement_list_type add; | |
297 | asection *input_section; | |
298 | }; | |
299 | ||
300 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
301 | ||
b34976b6 | 302 | static bfd_boolean |
7d8a3a28 | 303 | hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) |
9c1d81c1 AM |
304 | { |
305 | lang_statement_union_type *l; | |
b34976b6 | 306 | bfd_boolean ret; |
9c1d81c1 AM |
307 | |
308 | for (; (l = *lp) != NULL; lp = &l->header.next) | |
309 | { | |
310 | switch (l->header.type) | |
311 | { | |
312 | case lang_constructors_statement_enum: | |
313 | ret = hook_in_stub (info, &constructor_list.head); | |
314 | if (ret) | |
315 | return ret; | |
316 | break; | |
317 | ||
318 | case lang_output_section_statement_enum: | |
319 | ret = hook_in_stub (info, | |
320 | &l->output_section_statement.children.head); | |
321 | if (ret) | |
322 | return ret; | |
323 | break; | |
324 | ||
325 | case lang_wild_statement_enum: | |
326 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
327 | if (ret) | |
328 | return ret; | |
329 | break; | |
330 | ||
331 | case lang_group_statement_enum: | |
332 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
333 | if (ret) | |
334 | return ret; | |
335 | break; | |
336 | ||
337 | case lang_input_section_enum: | |
338 | if (l->input_section.section == info->input_section) | |
339 | { | |
340 | /* We've found our section. Insert the stub immediately | |
341 | before its associated input section. */ | |
342 | *lp = info->add.head; | |
343 | *(info->add.tail) = l; | |
b34976b6 | 344 | return TRUE; |
9c1d81c1 AM |
345 | } |
346 | break; | |
347 | ||
348 | case lang_data_statement_enum: | |
349 | case lang_reloc_statement_enum: | |
350 | case lang_object_symbols_statement_enum: | |
351 | case lang_output_statement_enum: | |
352 | case lang_target_statement_enum: | |
353 | case lang_input_statement_enum: | |
354 | case lang_assignment_statement_enum: | |
355 | case lang_padding_statement_enum: | |
356 | case lang_address_statement_enum: | |
357 | case lang_fill_statement_enum: | |
358 | break; | |
359 | ||
360 | default: | |
361 | FAIL (); | |
362 | break; | |
363 | } | |
364 | } | |
b34976b6 | 365 | return FALSE; |
9c1d81c1 AM |
366 | } |
367 | ||
368 | ||
369 | /* Call-back for ppc64_elf_size_stubs. */ | |
370 | ||
371 | /* Create a new stub section, and arrange for it to be linked | |
372 | immediately before INPUT_SECTION. */ | |
373 | ||
374 | static asection * | |
7d8a3a28 | 375 | ppc_add_stub_section (const char *stub_sec_name, asection *input_section) |
9c1d81c1 AM |
376 | { |
377 | asection *stub_sec; | |
378 | flagword flags; | |
379 | asection *output_section; | |
380 | const char *secname; | |
381 | lang_output_section_statement_type *os; | |
382 | struct hook_stub_info info; | |
383 | ||
9c1d81c1 | 384 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE |
e4e0193e | 385 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP); |
9795b468 AM |
386 | stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd, |
387 | stub_sec_name, flags); | |
bd518033 | 388 | if (stub_sec == NULL |
794e51c0 AM |
389 | || !bfd_set_section_alignment (stub_file->the_bfd, stub_sec, |
390 | plt_stub_align > 5 ? plt_stub_align : 5)) | |
9c1d81c1 AM |
391 | goto err_ret; |
392 | ||
393 | output_section = input_section->output_section; | |
394 | secname = bfd_get_section_name (output_section->owner, output_section); | |
395 | os = lang_output_section_find (secname); | |
396 | ||
397 | info.input_section = input_section; | |
398 | lang_list_init (&info.add); | |
b9c361e0 | 399 | lang_add_section (&info.add, stub_sec, NULL, os); |
9c1d81c1 AM |
400 | |
401 | if (info.add.head == NULL) | |
402 | goto err_ret; | |
403 | ||
68f8ff14 | 404 | stub_added = 1; |
9c1d81c1 AM |
405 | if (hook_in_stub (&info, &os->children.head)) |
406 | return stub_sec; | |
407 | ||
408 | err_ret: | |
409 | einfo ("%X%P: can not make stub section: %E\n"); | |
410 | return NULL; | |
411 | } | |
412 | ||
413 | ||
414 | /* Another call-back for ppc64_elf_size_stubs. */ | |
415 | ||
416 | static void | |
7d8a3a28 | 417 | ppc_layout_sections_again (void) |
9c1d81c1 AM |
418 | { |
419 | /* If we have changed sizes of the stub sections, then we need | |
420 | to recalculate all the section offsets. This may mean we need to | |
421 | add even more stubs. */ | |
8ded5a0f | 422 | gld${EMULATION_NAME}_map_segments (TRUE); |
1f808cd5 | 423 | |
1049f94e | 424 | if (!link_info.relocatable) |
f13a99db AM |
425 | _bfd_set_gp_value (link_info.output_bfd, |
426 | ppc64_elf_toc (link_info.output_bfd)); | |
eaeb0a9d AM |
427 | |
428 | need_laying_out = -1; | |
1f808cd5 AM |
429 | } |
430 | ||
9c1d81c1 | 431 | |
0b9a4d73 | 432 | static void |
7d8a3a28 | 433 | build_toc_list (lang_statement_union_type *statement) |
0b9a4d73 | 434 | { |
7b986e99 AM |
435 | if (statement->header.type == lang_input_section_enum) |
436 | { | |
437 | asection *i = statement->input_section.section; | |
438 | ||
dbaa2011 | 439 | if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS |
7b986e99 AM |
440 | && (i->flags & SEC_EXCLUDE) == 0 |
441 | && i->output_section == toc_section) | |
927be08e AM |
442 | { |
443 | if (!ppc64_elf_next_toc_section (&link_info, i)) | |
444 | einfo ("%X%P: linker script separates .got and .toc\n"); | |
445 | } | |
7b986e99 | 446 | } |
0b9a4d73 AM |
447 | } |
448 | ||
449 | ||
9c1d81c1 | 450 | static void |
7d8a3a28 | 451 | build_section_lists (lang_statement_union_type *statement) |
9c1d81c1 | 452 | { |
7b986e99 | 453 | if (statement->header.type == lang_input_section_enum) |
9c1d81c1 | 454 | { |
7b986e99 AM |
455 | asection *i = statement->input_section.section; |
456 | ||
66be1055 | 457 | if (!((lang_input_statement_type *) i->owner->usrdata)->flags.just_syms |
7b986e99 AM |
458 | && (i->flags & SEC_EXCLUDE) == 0 |
459 | && i->output_section != NULL | |
f13a99db | 460 | && i->output_section->owner == link_info.output_bfd) |
7b986e99 AM |
461 | { |
462 | if (!ppc64_elf_next_input_section (&link_info, i)) | |
463 | einfo ("%X%P: can not size stub section: %E\n"); | |
464 | } | |
9c1d81c1 AM |
465 | } |
466 | } | |
467 | ||
fac1652d | 468 | |
eaeb0a9d AM |
469 | /* Call the back-end function to set TOC base after we have placed all |
470 | the sections. */ | |
1f808cd5 | 471 | static void |
eaeb0a9d | 472 | gld${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${EMULATION_NAME}_map_segments (need_laying_out); | |
525 | ||
526 | if (!link_info.relocatable) | |
527 | _bfd_set_gp_value (link_info.output_bfd, | |
528 | ppc64_elf_toc (link_info.output_bfd)); | |
529 | } | |
530 | } | |
531 | ||
532 | ||
533 | /* Final emulation specific call. */ | |
534 | ||
535 | static void | |
536 | gld${EMULATION_NAME}_finish (void) | |
537 | { | |
538 | /* e_entry on PowerPC64 points to the function descriptor for | |
539 | _start. If _start is missing, default to the first function | |
540 | descriptor in the .opd section. */ | |
541 | entry_section = ".opd"; | |
deb04cdb | 542 | |
68f8ff14 | 543 | if (stub_added) |
9c1d81c1 | 544 | { |
bda6c678 AM |
545 | char *msg = NULL; |
546 | char *line, *endline; | |
547 | ||
b02c4cfa AM |
548 | if (emit_stub_syms < 0) |
549 | emit_stub_syms = 1; | |
bda6c678 AM |
550 | if (!ppc64_elf_build_stubs (emit_stub_syms, &link_info, |
551 | config.stats ? &msg : NULL)) | |
9c1d81c1 | 552 | einfo ("%X%P: can not build stubs: %E\n"); |
bda6c678 | 553 | |
e922bcab | 554 | fflush (stdout); |
bda6c678 AM |
555 | for (line = msg; line != NULL; line = endline) |
556 | { | |
557 | endline = strchr (line, '\n'); | |
558 | if (endline != NULL) | |
559 | *endline++ = '\0'; | |
560 | fprintf (stderr, "%s: %s\n", program_name, line); | |
561 | } | |
e922bcab | 562 | fflush (stderr); |
bda6c678 AM |
563 | if (msg != NULL) |
564 | free (msg); | |
9c1d81c1 | 565 | } |
99877b66 AM |
566 | |
567 | ppc64_elf_restore_symbols (&link_info); | |
1e035701 | 568 | finish_default (); |
9c1d81c1 | 569 | } |
1f808cd5 | 570 | |
76dc39fe | 571 | |
fac1652d AM |
572 | /* Add a pattern matching ".foo" for every "foo" in a version script. |
573 | ||
574 | The reason for doing this is that many shared library version | |
575 | scripts export a selected set of functions or data symbols, forcing | |
576 | others local. eg. | |
577 | ||
578 | . VERS_1 { | |
579 | . global: | |
580 | . this; that; some; thing; | |
581 | . local: | |
582 | . *; | |
583 | . }; | |
584 | ||
585 | To make the above work for PowerPC64, we need to export ".this", | |
586 | ".that" and so on, otherwise only the function descriptor syms are | |
587 | exported. Lack of an exported function code sym may cause a | |
588 | definition to be pulled in from a static library. */ | |
589 | ||
7d8a3a28 AM |
590 | static struct bfd_elf_version_expr * |
591 | gld${EMULATION_NAME}_new_vers_pattern (struct bfd_elf_version_expr *entry) | |
fac1652d AM |
592 | { |
593 | struct bfd_elf_version_expr *dot_entry; | |
fac1652d AM |
594 | unsigned int len; |
595 | char *dot_pat; | |
596 | ||
b7b7fe3f | 597 | if (!dotsyms |
ae5a3597 AM |
598 | || entry->pattern[0] == '.' |
599 | || (!entry->literal && entry->pattern[0] == '*')) | |
fac1652d AM |
600 | return entry; |
601 | ||
7d8a3a28 | 602 | dot_entry = xmalloc (sizeof *dot_entry); |
108ba305 | 603 | *dot_entry = *entry; |
fac1652d | 604 | dot_entry->next = entry; |
ae5a3597 AM |
605 | len = strlen (entry->pattern) + 2; |
606 | dot_pat = xmalloc (len); | |
607 | dot_pat[0] = '.'; | |
608 | memcpy (dot_pat + 1, entry->pattern, len - 1); | |
609 | dot_entry->pattern = dot_pat; | |
71755fdf | 610 | dot_entry->script = 1; |
fac1652d AM |
611 | return dot_entry; |
612 | } | |
613 | ||
614 | ||
9c1d81c1 AM |
615 | /* Avoid processing the fake stub_file in vercheck, stat_needed and |
616 | check_needed routines. */ | |
1f808cd5 | 617 | |
7d8a3a28 | 618 | static void (*real_func) (lang_input_statement_type *); |
1f808cd5 | 619 | |
7d8a3a28 | 620 | static void ppc_for_each_input_file_wrapper (lang_input_statement_type *l) |
9c1d81c1 AM |
621 | { |
622 | if (l != stub_file) | |
623 | (*real_func) (l); | |
1f808cd5 | 624 | } |
9c1d81c1 AM |
625 | |
626 | static void | |
7d8a3a28 | 627 | ppc_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) |
9c1d81c1 AM |
628 | { |
629 | real_func = func; | |
630 | lang_for_each_input_file (&ppc_for_each_input_file_wrapper); | |
631 | } | |
632 | ||
633 | #define lang_for_each_input_file ppc_lang_for_each_input_file | |
634 | ||
1f808cd5 AM |
635 | EOF |
636 | ||
dc27aea4 | 637 | if grep -q 'ld_elf32_spu_emulation' ldemul-list.h; then |
92b93329 | 638 | fragment <<EOF |
dc27aea4 AM |
639 | /* Special handling for embedded SPU executables. */ |
640 | extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *); | |
641 | static bfd_boolean gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *); | |
642 | ||
643 | static bfd_boolean | |
644 | ppc64_recognized_file (lang_input_statement_type *entry) | |
645 | { | |
646 | if (embedded_spu_file (entry, "-m64")) | |
647 | return TRUE; | |
648 | ||
649 | return gld${EMULATION_NAME}_load_symbols (entry); | |
650 | } | |
651 | EOF | |
652 | LDEMUL_RECOGNIZED_FILE=ppc64_recognized_file | |
653 | fi | |
654 | ||
9c1d81c1 AM |
655 | # Define some shell vars to insert bits of code into the standard elf |
656 | # parse_args and list_options functions. | |
657 | # | |
58d180e8 AM |
658 | PARSE_AND_LIST_PROLOGUE=${PARSE_AND_LIST_PROLOGUE}' |
659 | #define OPTION_STUBGROUP_SIZE 321 | |
9df0ef5f AM |
660 | #define OPTION_PLT_STATIC_CHAIN (OPTION_STUBGROUP_SIZE + 1) |
661 | #define OPTION_NO_PLT_STATIC_CHAIN (OPTION_PLT_STATIC_CHAIN + 1) | |
794e51c0 AM |
662 | #define OPTION_PLT_THREAD_SAFE (OPTION_NO_PLT_STATIC_CHAIN + 1) |
663 | #define OPTION_NO_PLT_THREAD_SAFE (OPTION_PLT_THREAD_SAFE + 1) | |
664 | #define OPTION_PLT_ALIGN (OPTION_NO_PLT_THREAD_SAFE + 1) | |
665 | #define OPTION_NO_PLT_ALIGN (OPTION_PLT_ALIGN + 1) | |
666 | #define OPTION_STUBSYMS (OPTION_NO_PLT_ALIGN + 1) | |
b02c4cfa AM |
667 | #define OPTION_NO_STUBSYMS (OPTION_STUBSYMS + 1) |
668 | #define OPTION_DOTSYMS (OPTION_NO_STUBSYMS + 1) | |
fac1652d | 669 | #define OPTION_NO_DOTSYMS (OPTION_DOTSYMS + 1) |
e5096e3f | 670 | #define OPTION_NO_TLS_OPT (OPTION_NO_DOTSYMS + 1) |
a7f2871e AM |
671 | #define OPTION_NO_TLS_GET_ADDR_OPT (OPTION_NO_TLS_OPT + 1) |
672 | #define OPTION_NO_OPD_OPT (OPTION_NO_TLS_GET_ADDR_OPT + 1) | |
c5614fa4 | 673 | #define OPTION_NO_TOC_OPT (OPTION_NO_OPD_OPT + 1) |
4c52953f | 674 | #define OPTION_NO_MULTI_TOC (OPTION_NO_TOC_OPT + 1) |
d43d0b53 AM |
675 | #define OPTION_NO_TOC_SORT (OPTION_NO_MULTI_TOC + 1) |
676 | #define OPTION_NON_OVERLAPPING_OPD (OPTION_NO_TOC_SORT + 1) | |
9c1d81c1 AM |
677 | ' |
678 | ||
58d180e8 | 679 | PARSE_AND_LIST_LONGOPTS=${PARSE_AND_LIST_LONGOPTS}' |
9c1d81c1 | 680 | { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, |
9df0ef5f AM |
681 | { "plt-static-chain", no_argument, NULL, OPTION_PLT_STATIC_CHAIN }, |
682 | { "no-plt-static-chain", no_argument, NULL, OPTION_NO_PLT_STATIC_CHAIN }, | |
794e51c0 AM |
683 | { "plt-thread-safe", no_argument, NULL, OPTION_PLT_THREAD_SAFE }, |
684 | { "no-plt-thread-safe", no_argument, NULL, OPTION_NO_PLT_THREAD_SAFE }, | |
685 | { "plt-align", optional_argument, NULL, OPTION_PLT_ALIGN }, | |
686 | { "no-plt-align", no_argument, NULL, OPTION_NO_PLT_ALIGN }, | |
0b9a4d73 | 687 | { "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS }, |
b02c4cfa | 688 | { "no-emit-stub-syms", no_argument, NULL, OPTION_NO_STUBSYMS }, |
fac1652d AM |
689 | { "dotsyms", no_argument, NULL, OPTION_DOTSYMS }, |
690 | { "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS }, | |
e5096e3f | 691 | { "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT }, |
a7f2871e | 692 | { "no-tls-get-addr-optimize", no_argument, NULL, OPTION_NO_TLS_GET_ADDR_OPT }, |
c5614fa4 AM |
693 | { "no-opd-optimize", no_argument, NULL, OPTION_NO_OPD_OPT }, |
694 | { "no-toc-optimize", no_argument, NULL, OPTION_NO_TOC_OPT }, | |
4c52953f | 695 | { "no-multi-toc", no_argument, NULL, OPTION_NO_MULTI_TOC }, |
d43d0b53 | 696 | { "no-toc-sort", no_argument, NULL, OPTION_NO_TOC_SORT }, |
3f764659 | 697 | { "non-overlapping-opd", no_argument, NULL, OPTION_NON_OVERLAPPING_OPD }, |
9c1d81c1 AM |
698 | ' |
699 | ||
58d180e8 | 700 | PARSE_AND_LIST_OPTIONS=${PARSE_AND_LIST_OPTIONS}' |
9c1d81c1 | 701 | fprintf (file, _("\ |
442996ee AM |
702 | --stub-group-size=N Maximum size of a group of input sections that\n\ |
703 | can be handled by one stub section. A negative\n\ | |
704 | value locates all stubs before their branches\n\ | |
705 | (with a group size of -N), while a positive\n\ | |
706 | value allows two groups of input sections, one\n\ | |
707 | before, and one after each stub section.\n\ | |
708 | Values of +/-1 indicate the linker should\n\ | |
709 | choose suitable defaults.\n" | |
9c1d81c1 | 710 | )); |
fac1652d | 711 | fprintf (file, _("\ |
794e51c0 AM |
712 | --plt-static-chain PLT call stubs should load r11.${DEFAULT_PLT_STATIC_CHAIN- (default)}\n" |
713 | )); | |
714 | fprintf (file, _("\ | |
715 | --no-plt-static-chain PLT call stubs should not load r11.${DEFAULT_PLT_STATIC_CHAIN+ (default)}\n" | |
716 | )); | |
717 | fprintf (file, _("\ | |
718 | --plt-thread-safe PLT call stubs with load-load barrier.\n" | |
719 | )); | |
720 | fprintf (file, _("\ | |
721 | --no-plt-thread-safe PLT call stubs without barrier.\n" | |
722 | )); | |
723 | fprintf (file, _("\ | |
724 | --plt-align [=<align>] Align PLT call stubs to fit cache lines.\n" | |
9df0ef5f AM |
725 | )); |
726 | fprintf (file, _("\ | |
794e51c0 | 727 | --no-plt-align Dont'\''t align individual PLT call stubs.\n" |
9df0ef5f AM |
728 | )); |
729 | fprintf (file, _("\ | |
442996ee | 730 | --emit-stub-syms Label linker stubs with a symbol.\n" |
0b9a4d73 AM |
731 | )); |
732 | fprintf (file, _("\ | |
b02c4cfa AM |
733 | --no-emit-stub-syms Don'\''t label linker stubs with a symbol.\n" |
734 | )); | |
735 | fprintf (file, _("\ | |
442996ee AM |
736 | --dotsyms For every version pattern \"foo\" in a version\n\ |
737 | script, add \".foo\" so that function code\n\ | |
738 | symbols are treated the same as function\n\ | |
739 | descriptor symbols. Defaults to on.\n" | |
fac1652d AM |
740 | )); |
741 | fprintf (file, _("\ | |
442996ee | 742 | --no-dotsyms Don'\''t do anything special in version scripts.\n" |
fac1652d | 743 | )); |
e5096e3f | 744 | fprintf (file, _("\ |
442996ee | 745 | --no-tls-optimize Don'\''t try to optimize TLS accesses.\n" |
e5096e3f | 746 | )); |
3f764659 | 747 | fprintf (file, _("\ |
a7f2871e AM |
748 | --no-tls-get-addr-optimize Don'\''t use a special __tls_get_addr call.\n" |
749 | )); | |
750 | fprintf (file, _("\ | |
442996ee | 751 | --no-opd-optimize Don'\''t optimize the OPD section.\n" |
c5614fa4 AM |
752 | )); |
753 | fprintf (file, _("\ | |
442996ee | 754 | --no-toc-optimize Don'\''t optimize the TOC section.\n" |
c5614fa4 AM |
755 | )); |
756 | fprintf (file, _("\ | |
442996ee | 757 | --no-multi-toc Disallow automatic multiple toc sections.\n" |
4c52953f AM |
758 | )); |
759 | fprintf (file, _("\ | |
d43d0b53 AM |
760 | --no-toc-sort Don'\''t sort TOC and GOT sections.\n" |
761 | )); | |
762 | fprintf (file, _("\ | |
442996ee AM |
763 | --non-overlapping-opd Canonicalize .opd, so that there are no\n\ |
764 | overlapping .opd entries.\n" | |
3f764659 | 765 | )); |
9c1d81c1 AM |
766 | ' |
767 | ||
58d180e8 | 768 | PARSE_AND_LIST_ARGS_CASES=${PARSE_AND_LIST_ARGS_CASES}' |
9c1d81c1 AM |
769 | case OPTION_STUBGROUP_SIZE: |
770 | { | |
771 | const char *end; | |
772 | group_size = bfd_scan_vma (optarg, &end, 0); | |
773 | if (*end) | |
774 | einfo (_("%P%F: invalid number `%s'\''\n"), optarg); | |
775 | } | |
776 | break; | |
fac1652d | 777 | |
9df0ef5f AM |
778 | case OPTION_PLT_STATIC_CHAIN: |
779 | plt_static_chain = 1; | |
780 | break; | |
781 | ||
782 | case OPTION_NO_PLT_STATIC_CHAIN: | |
783 | plt_static_chain = 0; | |
784 | break; | |
785 | ||
794e51c0 AM |
786 | case OPTION_PLT_THREAD_SAFE: |
787 | plt_thread_safe = 1; | |
788 | break; | |
789 | ||
790 | case OPTION_NO_PLT_THREAD_SAFE: | |
791 | plt_thread_safe = 0; | |
792 | break; | |
793 | ||
794 | case OPTION_PLT_ALIGN: | |
795 | if (optarg != NULL) | |
796 | { | |
797 | char *end; | |
798 | unsigned long val = strtoul (optarg, &end, 0); | |
799 | if (*end || val > 8) | |
800 | einfo (_("%P%F: invalid --plt-align `%s'\''\n"), optarg); | |
801 | plt_stub_align = val; | |
802 | } | |
803 | else | |
804 | plt_stub_align = 5; | |
805 | break; | |
806 | ||
807 | case OPTION_NO_PLT_ALIGN: | |
808 | plt_stub_align = 0; | |
809 | break; | |
810 | ||
0b9a4d73 AM |
811 | case OPTION_STUBSYMS: |
812 | emit_stub_syms = 1; | |
813 | break; | |
814 | ||
b02c4cfa AM |
815 | case OPTION_NO_STUBSYMS: |
816 | emit_stub_syms = 0; | |
817 | break; | |
818 | ||
fac1652d | 819 | case OPTION_DOTSYMS: |
e5096e3f | 820 | dotsyms = 1; |
fac1652d AM |
821 | break; |
822 | ||
823 | case OPTION_NO_DOTSYMS: | |
e5096e3f AM |
824 | dotsyms = 0; |
825 | break; | |
826 | ||
827 | case OPTION_NO_TLS_OPT: | |
c5614fa4 AM |
828 | no_tls_opt = 1; |
829 | break; | |
830 | ||
a7f2871e AM |
831 | case OPTION_NO_TLS_GET_ADDR_OPT: |
832 | no_tls_get_addr_opt = 1; | |
833 | break; | |
834 | ||
c5614fa4 AM |
835 | case OPTION_NO_OPD_OPT: |
836 | no_opd_opt = 1; | |
837 | break; | |
838 | ||
839 | case OPTION_NO_TOC_OPT: | |
840 | no_toc_opt = 1; | |
fac1652d | 841 | break; |
3f764659 | 842 | |
4c52953f AM |
843 | case OPTION_NO_MULTI_TOC: |
844 | no_multi_toc = 1; | |
845 | break; | |
846 | ||
d43d0b53 AM |
847 | case OPTION_NO_TOC_SORT: |
848 | no_toc_sort = 1; | |
849 | break; | |
850 | ||
3f764659 JJ |
851 | case OPTION_NON_OVERLAPPING_OPD: |
852 | non_overlapping_opd = 1; | |
853 | break; | |
f05eb3b7 AM |
854 | |
855 | case OPTION_TRADITIONAL_FORMAT: | |
856 | no_tls_opt = 1; | |
857 | no_tls_get_addr_opt = 1; | |
858 | no_opd_opt = 1; | |
859 | no_toc_opt = 1; | |
860 | no_multi_toc = 1; | |
861 | no_toc_sort = 1; | |
862 | plt_static_chain = 1; | |
863 | return FALSE; | |
9c1d81c1 AM |
864 | ' |
865 | ||
1f808cd5 AM |
866 | # Put these extra ppc64elf routines in ld_${EMULATION_NAME}_emulation |
867 | # | |
836c6af1 | 868 | LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation |
1f808cd5 | 869 | LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation |
8ded5a0f | 870 | LDEMUL_FINISH=gld${EMULATION_NAME}_finish |
9c1d81c1 | 871 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_create_output_section_statements |
fac1652d | 872 | LDEMUL_NEW_VERS_PATTERN=gld${EMULATION_NAME}_new_vers_pattern |