Commit | Line | Data |
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e0001a05 | 1 | # This shell script emits a C file. -*- C -*- |
f13a99db | 2 | # Copyright 2003, 2004, 2005, 2006, 2007, 2008 |
e0001a05 NC |
3 | # Free Software Foundation, Inc. |
4 | # | |
f96b4a7b | 5 | # This file is part of the GNU Binutils. |
e0001a05 NC |
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 |
e0001a05 NC |
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. | |
e0001a05 NC |
21 | # |
22 | ||
23 | # This file is sourced from elf32.em, and defines extra xtensa-elf | |
24 | # specific routines. | |
25 | # | |
92b93329 | 26 | fragment <<EOF |
e0001a05 NC |
27 | |
28 | #include <xtensa-config.h> | |
43cd72b9 BW |
29 | #include "../bfd/elf-bfd.h" |
30 | #include "../bfd/libbfd.h" | |
31 | #include "elf/xtensa.h" | |
32 | #include "bfd.h" | |
e0001a05 | 33 | |
2caa7ca0 BW |
34 | /* Provide default values for new configuration settings. */ |
35 | #ifndef XSHAL_ABI | |
36 | #define XSHAL_ABI 0 | |
37 | #endif | |
38 | ||
0c7a8e5a AM |
39 | static void xtensa_wild_group_interleave (lang_statement_union_type *); |
40 | static void xtensa_colocate_output_literals (lang_statement_union_type *); | |
a255b6c7 BW |
41 | static void xtensa_strip_inconsistent_linkonce_sections |
42 | (lang_statement_list_type *); | |
e0001a05 NC |
43 | |
44 | ||
45 | /* Flag for the emulation-specific "--no-relax" option. */ | |
46 | static bfd_boolean disable_relaxation = FALSE; | |
47 | ||
48 | /* This number is irrelevant until we turn on use_literal_pages */ | |
49 | static bfd_vma xtensa_page_power = 12; /* 4K pages. */ | |
50 | ||
51 | /* To force a page break between literals and text, change | |
43cd72b9 | 52 | xtensa_use_literal_pages to "TRUE". */ |
e0001a05 NC |
53 | static bfd_boolean xtensa_use_literal_pages = FALSE; |
54 | ||
55 | #define EXTRA_VALIDATION 0 | |
56 | ||
57 | ||
58 | static char * | |
0c7a8e5a AM |
59 | elf_xtensa_choose_target (int argc ATTRIBUTE_UNUSED, |
60 | char **argv ATTRIBUTE_UNUSED) | |
e0001a05 NC |
61 | { |
62 | if (XCHAL_HAVE_BE) | |
63 | return "${BIG_OUTPUT_FORMAT}"; | |
64 | else | |
65 | return "${LITTLE_OUTPUT_FORMAT}"; | |
66 | } | |
67 | ||
68 | ||
e0001a05 | 69 | static void |
0c7a8e5a | 70 | elf_xtensa_before_parse (void) |
e0001a05 NC |
71 | { |
72 | /* Just call the default hook.... Tensilica's version of this function | |
73 | does some other work that isn't relevant here. */ | |
74 | gld${EMULATION_NAME}_before_parse (); | |
75 | } | |
76 | ||
77 | ||
7fa3d080 BW |
78 | static void |
79 | remove_section (bfd *abfd, asection *os) | |
43cd72b9 BW |
80 | { |
81 | asection **spp; | |
82 | for (spp = &abfd->sections; *spp; spp = &(*spp)->next) | |
83 | if (*spp == os) | |
84 | { | |
85 | *spp = os->next; | |
86 | os->owner->section_count--; | |
87 | break; | |
88 | } | |
89 | } | |
90 | ||
91 | ||
7fa3d080 BW |
92 | static bfd_boolean |
93 | replace_insn_sec_with_prop_sec (bfd *abfd, | |
94 | const char *insn_sec_name, | |
95 | const char *prop_sec_name, | |
96 | char **error_message) | |
43cd72b9 BW |
97 | { |
98 | asection *insn_sec; | |
99 | asection *prop_sec; | |
100 | bfd_byte *prop_contents = NULL; | |
101 | bfd_byte *insn_contents = NULL; | |
102 | unsigned entry_count; | |
103 | unsigned entry; | |
104 | Elf_Internal_Shdr *symtab_hdr; | |
105 | Elf_Internal_Rela *internal_relocs = NULL; | |
106 | unsigned reloc_count; | |
92b93329 | 107 | |
43cd72b9 BW |
108 | *error_message = ""; |
109 | insn_sec = bfd_get_section_by_name (abfd, insn_sec_name); | |
110 | if (insn_sec == NULL) | |
111 | return TRUE; | |
112 | entry_count = insn_sec->size / 8; | |
113 | ||
114 | prop_sec = bfd_get_section_by_name (abfd, prop_sec_name); | |
115 | if (prop_sec != NULL && insn_sec != NULL) | |
116 | { | |
117 | *error_message = _("file already has property tables"); | |
118 | return FALSE; | |
119 | } | |
92b93329 | 120 | |
43cd72b9 BW |
121 | if (insn_sec->size != 0) |
122 | { | |
123 | insn_contents = (bfd_byte *) bfd_malloc (insn_sec->size); | |
124 | if (insn_contents == NULL) | |
125 | { | |
126 | *error_message = _("out of memory"); | |
127 | goto cleanup; | |
128 | } | |
129 | if (! bfd_get_section_contents (abfd, insn_sec, insn_contents, | |
130 | (file_ptr) 0, insn_sec->size)) | |
131 | { | |
132 | *error_message = _("failed to read section contents"); | |
133 | goto cleanup; | |
134 | } | |
135 | } | |
136 | ||
2caa7ca0 | 137 | /* Create a property table section for it. */ |
43cd72b9 | 138 | prop_sec_name = strdup (prop_sec_name); |
2caa7ca0 BW |
139 | prop_sec = bfd_make_section_with_flags |
140 | (abfd, prop_sec_name, bfd_get_section_flags (abfd, insn_sec)); | |
43cd72b9 | 141 | if (prop_sec == NULL |
43cd72b9 BW |
142 | || ! bfd_set_section_alignment (abfd, prop_sec, 2)) |
143 | { | |
144 | *error_message = _("could not create new section"); | |
145 | goto cleanup; | |
146 | } | |
92b93329 | 147 | |
43cd72b9 BW |
148 | prop_sec->size = entry_count * 12; |
149 | prop_contents = (bfd_byte *) bfd_zalloc (abfd, prop_sec->size); | |
150 | elf_section_data (prop_sec)->this_hdr.contents = prop_contents; | |
151 | ||
152 | /* The entry size and size must be set to allow the linker to compute | |
153 | the number of relocations since it does not use reloc_count. */ | |
154 | elf_section_data (prop_sec)->rel_hdr.sh_entsize = | |
155 | sizeof (Elf32_External_Rela); | |
92b93329 | 156 | elf_section_data (prop_sec)->rel_hdr.sh_size = |
43cd72b9 BW |
157 | elf_section_data (insn_sec)->rel_hdr.sh_size; |
158 | ||
159 | if (prop_contents == NULL && prop_sec->size != 0) | |
160 | { | |
161 | *error_message = _("could not allocate section contents"); | |
162 | goto cleanup; | |
163 | } | |
164 | ||
165 | /* Read the relocations. */ | |
166 | reloc_count = insn_sec->reloc_count; | |
167 | if (reloc_count != 0) | |
168 | { | |
169 | /* If there is already an internal_reloc, then save it so that the | |
170 | read_relocs function freshly allocates a copy. */ | |
171 | Elf_Internal_Rela *saved_relocs = elf_section_data (insn_sec)->relocs; | |
92b93329 | 172 | |
43cd72b9 | 173 | elf_section_data (insn_sec)->relocs = NULL; |
92b93329 | 174 | internal_relocs = |
43cd72b9 BW |
175 | _bfd_elf_link_read_relocs (abfd, insn_sec, NULL, NULL, FALSE); |
176 | elf_section_data (insn_sec)->relocs = saved_relocs; | |
92b93329 | 177 | |
43cd72b9 BW |
178 | if (internal_relocs == NULL) |
179 | { | |
180 | *error_message = _("out of memory"); | |
181 | goto cleanup; | |
182 | } | |
183 | } | |
184 | ||
185 | /* Create a relocation section for the property section. */ | |
186 | if (internal_relocs != NULL) | |
187 | { | |
188 | elf_section_data (prop_sec)->relocs = internal_relocs; | |
189 | prop_sec->reloc_count = reloc_count; | |
190 | } | |
92b93329 | 191 | |
43cd72b9 BW |
192 | /* Now copy each insn table entry to the prop table entry with |
193 | appropriate flags. */ | |
194 | for (entry = 0; entry < entry_count; ++entry) | |
195 | { | |
196 | unsigned value; | |
99ded152 | 197 | unsigned flags = (XTENSA_PROP_INSN | XTENSA_PROP_NO_TRANSFORM |
43cd72b9 BW |
198 | | XTENSA_PROP_INSN_NO_REORDER); |
199 | value = bfd_get_32 (abfd, insn_contents + entry * 8 + 0); | |
200 | bfd_put_32 (abfd, value, prop_contents + entry * 12 + 0); | |
201 | value = bfd_get_32 (abfd, insn_contents + entry * 8 + 4); | |
202 | bfd_put_32 (abfd, value, prop_contents + entry * 12 + 4); | |
203 | bfd_put_32 (abfd, flags, prop_contents + entry * 12 + 8); | |
204 | } | |
205 | ||
206 | /* Now copy all of the relocations. Change offsets for the | |
207 | instruction table section to offsets in the property table | |
208 | section. */ | |
209 | if (internal_relocs) | |
210 | { | |
211 | unsigned i; | |
212 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
213 | ||
214 | for (i = 0; i < reloc_count; i++) | |
215 | { | |
216 | Elf_Internal_Rela *rela; | |
217 | unsigned r_offset; | |
218 | ||
219 | rela = &internal_relocs[i]; | |
220 | ||
92b93329 | 221 | /* If this relocation is to the .xt.insn section, |
43cd72b9 BW |
222 | change the section number and the offset. */ |
223 | r_offset = rela->r_offset; | |
224 | r_offset += 4 * (r_offset / 8); | |
225 | rela->r_offset = r_offset; | |
226 | } | |
227 | } | |
228 | ||
229 | remove_section (abfd, insn_sec); | |
92b93329 | 230 | |
43cd72b9 BW |
231 | if (insn_contents) |
232 | free (insn_contents); | |
92b93329 | 233 | |
43cd72b9 BW |
234 | return TRUE; |
235 | ||
236 | cleanup: | |
237 | if (prop_sec && prop_sec->owner) | |
238 | remove_section (abfd, prop_sec); | |
239 | if (insn_contents) | |
240 | free (insn_contents); | |
241 | if (internal_relocs) | |
242 | free (internal_relocs); | |
243 | ||
244 | return FALSE; | |
245 | } | |
246 | ||
247 | ||
248 | #define PROP_SEC_BASE_NAME ".xt.prop" | |
249 | #define INSN_SEC_BASE_NAME ".xt.insn" | |
250 | #define LINKONCE_SEC_OLD_TEXT_BASE_NAME ".gnu.linkonce.x." | |
251 | ||
252 | ||
7fa3d080 BW |
253 | static void |
254 | replace_instruction_table_sections (bfd *abfd, asection *sec) | |
43cd72b9 BW |
255 | { |
256 | char *message = ""; | |
257 | const char *insn_sec_name = NULL; | |
258 | char *prop_sec_name = NULL; | |
259 | char *owned_prop_sec_name = NULL; | |
260 | const char *sec_name; | |
92b93329 | 261 | |
43cd72b9 BW |
262 | sec_name = bfd_get_section_name (abfd, sec); |
263 | if (strcmp (sec_name, INSN_SEC_BASE_NAME) == 0) | |
264 | { | |
265 | insn_sec_name = INSN_SEC_BASE_NAME; | |
266 | prop_sec_name = PROP_SEC_BASE_NAME; | |
267 | } | |
0112cd26 | 268 | else if (CONST_STRNEQ (sec_name, LINKONCE_SEC_OLD_TEXT_BASE_NAME)) |
43cd72b9 BW |
269 | { |
270 | insn_sec_name = sec_name; | |
271 | owned_prop_sec_name = (char *) xmalloc (strlen (sec_name) + 20); | |
272 | prop_sec_name = owned_prop_sec_name; | |
273 | strcpy (prop_sec_name, ".gnu.linkonce.prop.t."); | |
274 | strcat (prop_sec_name, | |
275 | sec_name + strlen (LINKONCE_SEC_OLD_TEXT_BASE_NAME)); | |
276 | } | |
277 | if (insn_sec_name != NULL) | |
278 | { | |
279 | if (! replace_insn_sec_with_prop_sec (abfd, insn_sec_name, prop_sec_name, | |
280 | &message)) | |
281 | { | |
282 | einfo (_("%P: warning: failed to convert %s table in %B (%s); subsequent disassembly may be incomplete\n"), | |
283 | insn_sec_name, abfd, message); | |
284 | } | |
285 | } | |
286 | if (owned_prop_sec_name) | |
287 | free (owned_prop_sec_name); | |
288 | } | |
289 | ||
290 | ||
291 | /* This is called after all input sections have been opened to convert | |
292 | instruction tables (.xt.insn, gnu.linkonce.x.*) tables into property | |
293 | tables (.xt.prop) before any section placement. */ | |
294 | ||
295 | static void | |
296 | elf_xtensa_after_open (void) | |
297 | { | |
43cd72b9 BW |
298 | /* First call the ELF version. */ |
299 | gld${EMULATION_NAME}_after_open (); | |
92b93329 | 300 | |
43cd72b9 | 301 | /* Now search the input files looking for instruction table sections. */ |
2caa7ca0 | 302 | LANG_FOR_EACH_INPUT_STATEMENT (f) |
43cd72b9 | 303 | { |
2caa7ca0 | 304 | asection *sec = f->the_bfd->sections; |
43cd72b9 BW |
305 | asection *next_sec; |
306 | ||
307 | /* Do not use bfd_map_over_sections here since we are removing | |
308 | sections as we iterate. */ | |
309 | while (sec != NULL) | |
310 | { | |
311 | next_sec = sec->next; | |
2caa7ca0 | 312 | replace_instruction_table_sections (f->the_bfd, sec); |
43cd72b9 BW |
313 | sec = next_sec; |
314 | } | |
315 | } | |
316 | } | |
317 | ||
318 | ||
2caa7ca0 BW |
319 | static bfd_boolean |
320 | xt_config_info_unpack_and_check (char *data, | |
321 | bfd_boolean *pmismatch, | |
322 | char **pmsg) | |
323 | { | |
324 | char *d, *key; | |
325 | unsigned num; | |
326 | ||
327 | *pmismatch = FALSE; | |
328 | ||
329 | d = data; | |
330 | while (*d) | |
331 | { | |
332 | key = d; | |
333 | d = strchr (d, '='); | |
334 | if (! d) | |
335 | goto error; | |
336 | ||
337 | /* Overwrite the equal sign. */ | |
338 | *d++ = 0; | |
339 | ||
340 | /* Check if this is a quoted string or a number. */ | |
341 | if (*d == '"') | |
342 | { | |
343 | /* No string values are currently checked by LD; | |
344 | just skip over the quotes. */ | |
345 | d++; | |
346 | d = strchr (d, '"'); | |
347 | if (! d) | |
348 | goto error; | |
349 | /* Overwrite the trailing quote. */ | |
350 | *d++ = 0; | |
351 | } | |
352 | else | |
353 | { | |
354 | if (*d == 0) | |
355 | goto error; | |
356 | num = strtoul (d, &d, 0); | |
357 | ||
358 | if (! strcmp (key, "ABI")) | |
359 | { | |
360 | if (num != XSHAL_ABI) | |
361 | { | |
362 | *pmismatch = TRUE; | |
363 | *pmsg = "ABI does not match"; | |
364 | } | |
365 | } | |
366 | else if (! strcmp (key, "USE_ABSOLUTE_LITERALS")) | |
367 | { | |
368 | if (num != XSHAL_USE_ABSOLUTE_LITERALS) | |
369 | { | |
370 | *pmismatch = TRUE; | |
371 | *pmsg = "incompatible use of the Extended L32R option"; | |
372 | } | |
373 | } | |
374 | } | |
375 | ||
376 | if (*d++ != '\n') | |
377 | goto error; | |
378 | } | |
379 | ||
380 | return TRUE; | |
381 | ||
382 | error: | |
383 | return FALSE; | |
384 | } | |
385 | ||
386 | ||
387 | #define XTINFO_NAME "Xtensa_Info" | |
388 | #define XTINFO_NAMESZ 12 | |
389 | #define XTINFO_TYPE 1 | |
390 | ||
391 | static void | |
392 | check_xtensa_info (bfd *abfd, asection *info_sec) | |
393 | { | |
394 | char *data, *errmsg = ""; | |
395 | bfd_boolean mismatch; | |
396 | ||
397 | data = xmalloc (info_sec->size); | |
398 | if (! bfd_get_section_contents (abfd, info_sec, data, 0, info_sec->size)) | |
399 | einfo (_("%F%P:%B: cannot read contents of section %A\n"), abfd, info_sec); | |
400 | ||
401 | if (info_sec->size > 24 | |
402 | && info_sec->size >= 24 + bfd_get_32 (abfd, data + 4) | |
403 | && bfd_get_32 (abfd, data + 0) == XTINFO_NAMESZ | |
404 | && bfd_get_32 (abfd, data + 8) == XTINFO_TYPE | |
405 | && strcmp (data + 12, XTINFO_NAME) == 0 | |
406 | && xt_config_info_unpack_and_check (data + 12 + XTINFO_NAMESZ, | |
407 | &mismatch, &errmsg)) | |
408 | { | |
409 | if (mismatch) | |
410 | einfo (_("%P:%B: warning: incompatible Xtensa configuration (%s)\n"), | |
411 | abfd, errmsg); | |
412 | } | |
413 | else | |
414 | einfo (_("%P:%B: warning: cannot parse .xtensa.info section\n"), abfd); | |
415 | ||
416 | free (data); | |
417 | } | |
418 | ||
419 | ||
e0001a05 NC |
420 | /* This is called after the sections have been attached to output |
421 | sections, but before any sizes or addresses have been set. */ | |
422 | ||
0c7a8e5a AM |
423 | static void |
424 | elf_xtensa_before_allocation (void) | |
e0001a05 | 425 | { |
2caa7ca0 BW |
426 | asection *info_sec, *first_info_sec; |
427 | bfd *first_bfd; | |
e0001a05 NC |
428 | bfd_boolean is_big_endian = XCHAL_HAVE_BE; |
429 | ||
430 | /* Check that the output endianness matches the Xtensa | |
431 | configuration. The BFD library always includes both big and | |
432 | little endian target vectors for Xtensa, but it only supports the | |
433 | detailed instruction encode/decode operations (such as are | |
434 | required to process relocations) for the selected Xtensa | |
435 | configuration. */ | |
436 | ||
f13a99db AM |
437 | if (is_big_endian |
438 | && link_info.output_bfd->xvec->byteorder == BFD_ENDIAN_LITTLE) | |
e0001a05 NC |
439 | { |
440 | einfo (_("%F%P: little endian output does not match " | |
441 | "Xtensa configuration\n")); | |
442 | } | |
f13a99db AM |
443 | if (!is_big_endian |
444 | && link_info.output_bfd->xvec->byteorder == BFD_ENDIAN_BIG) | |
e0001a05 NC |
445 | { |
446 | einfo (_("%F%P: big endian output does not match " | |
447 | "Xtensa configuration\n")); | |
448 | } | |
449 | ||
2caa7ca0 BW |
450 | /* Keep track of the first input .xtensa.info section, and as a fallback, |
451 | the first input bfd where a .xtensa.info section could be created. | |
452 | After the input .xtensa.info has been checked, the contents of the | |
453 | first one will be replaced with the output .xtensa.info table. */ | |
454 | first_info_sec = 0; | |
455 | first_bfd = 0; | |
e0001a05 | 456 | |
2caa7ca0 BW |
457 | LANG_FOR_EACH_INPUT_STATEMENT (f) |
458 | { | |
459 | /* Check that the endianness for each input file matches the output. | |
460 | The merge_private_bfd_data hook has already reported any mismatches | |
461 | as errors, but those errors are not fatal. At this point, we | |
462 | cannot go any further if there are any mismatches. */ | |
463 | if ((is_big_endian && f->the_bfd->xvec->byteorder == BFD_ENDIAN_LITTLE) | |
464 | || (!is_big_endian && f->the_bfd->xvec->byteorder == BFD_ENDIAN_BIG)) | |
465 | einfo (_("%F%P: cross-endian linking for %B not supported\n"), | |
466 | f->the_bfd); | |
467 | ||
468 | if (! first_bfd) | |
469 | first_bfd = f->the_bfd; | |
470 | ||
471 | info_sec = bfd_get_section_by_name (f->the_bfd, ".xtensa.info"); | |
472 | if (! info_sec) | |
473 | continue; | |
474 | ||
475 | if (! first_info_sec) | |
476 | first_info_sec = info_sec; | |
477 | ||
478 | /* Unpack the .xtensa.info section and check it against the current | |
479 | Xtensa configuration. */ | |
480 | check_xtensa_info (f->the_bfd, info_sec); | |
481 | ||
482 | /* Do not include this copy of .xtensa.info in the output. */ | |
483 | info_sec->size = 0; | |
484 | info_sec->flags |= SEC_EXCLUDE; | |
485 | } | |
486 | ||
487 | /* Reuse the first .xtensa.info input section to hold the output | |
488 | .xtensa.info; or, if none were found, create a new section in the | |
489 | first input bfd (assuming there is one). */ | |
490 | info_sec = first_info_sec; | |
491 | if (! info_sec && first_bfd) | |
492 | { | |
493 | info_sec = bfd_make_section_with_flags (first_bfd, ".xtensa.info", | |
494 | SEC_HAS_CONTENTS | SEC_READONLY); | |
495 | if (! info_sec) | |
496 | einfo (_("%F%P: failed to create .xtensa.info section\n")); | |
497 | } | |
498 | if (info_sec) | |
e0001a05 | 499 | { |
2caa7ca0 BW |
500 | int xtensa_info_size; |
501 | char *data; | |
502 | ||
503 | info_sec->flags &= ~SEC_EXCLUDE; | |
504 | info_sec->flags |= SEC_IN_MEMORY; | |
505 | ||
506 | data = xmalloc (100); | |
507 | sprintf (data, "USE_ABSOLUTE_LITERALS=%d\nABI=%d\n", | |
508 | XSHAL_USE_ABSOLUTE_LITERALS, XSHAL_ABI); | |
509 | xtensa_info_size = strlen (data) + 1; | |
510 | ||
511 | /* Add enough null terminators to pad to a word boundary. */ | |
512 | do | |
513 | data[xtensa_info_size++] = 0; | |
514 | while ((xtensa_info_size & 3) != 0); | |
515 | ||
516 | info_sec->size = 12 + XTINFO_NAMESZ + xtensa_info_size; | |
517 | info_sec->contents = xmalloc (info_sec->size); | |
518 | bfd_put_32 (info_sec->owner, XTINFO_NAMESZ, info_sec->contents + 0); | |
519 | bfd_put_32 (info_sec->owner, xtensa_info_size, info_sec->contents + 4); | |
520 | bfd_put_32 (info_sec->owner, XTINFO_TYPE, info_sec->contents + 8); | |
521 | memcpy (info_sec->contents + 12, XTINFO_NAME, XTINFO_NAMESZ); | |
522 | memcpy (info_sec->contents + 12 + XTINFO_NAMESZ, data, xtensa_info_size); | |
523 | free (data); | |
e0001a05 NC |
524 | } |
525 | ||
526 | /* Enable relaxation by default if the "--no-relax" option was not | |
527 | specified. This is done here instead of in the before_parse hook | |
528 | because there is a check in main() to prohibit use of --relax and | |
529 | -r together and that combination should be allowed for Xtensa. */ | |
530 | ||
531 | if (!disable_relaxation) | |
532 | command_line.relax = TRUE; | |
533 | ||
a255b6c7 BW |
534 | xtensa_strip_inconsistent_linkonce_sections (stat_ptr); |
535 | ||
e0001a05 NC |
536 | gld${EMULATION_NAME}_before_allocation (); |
537 | ||
538 | xtensa_wild_group_interleave (stat_ptr->head); | |
0c7a8e5a | 539 | if (command_line.relax) |
e0001a05 NC |
540 | xtensa_colocate_output_literals (stat_ptr->head); |
541 | ||
542 | /* TBD: We need to force the page alignments to here and only do | |
543 | them as needed for the entire output section. Finally, if this | |
1049f94e | 544 | is a relocatable link then we need to add alignment notes so |
e0001a05 NC |
545 | that the literals can be separated later. */ |
546 | } | |
547 | ||
548 | ||
549 | typedef struct wildcard_list section_name_list; | |
550 | ||
551 | typedef struct reloc_deps_e_t reloc_deps_e; | |
552 | typedef struct reloc_deps_section_t reloc_deps_section; | |
553 | typedef struct reloc_deps_graph_t reloc_deps_graph; | |
554 | ||
555 | ||
556 | struct reloc_deps_e_t | |
557 | { | |
558 | asection *src; /* Contains l32rs. */ | |
559 | asection *tgt; /* Contains literals. */ | |
560 | reloc_deps_e *next; | |
561 | }; | |
562 | ||
563 | /* Place these in the userdata field. */ | |
564 | struct reloc_deps_section_t | |
565 | { | |
566 | reloc_deps_e *preds; | |
567 | reloc_deps_e *succs; | |
568 | bfd_boolean is_only_literal; | |
569 | }; | |
570 | ||
571 | ||
572 | struct reloc_deps_graph_t | |
573 | { | |
574 | size_t count; | |
575 | size_t size; | |
576 | asection **sections; | |
577 | }; | |
578 | ||
579 | static void xtensa_layout_wild | |
0c7a8e5a | 580 | (const reloc_deps_graph *, lang_wild_statement_type *); |
e0001a05 | 581 | |
0c7a8e5a AM |
582 | typedef void (*deps_callback_t) (asection *, /* src_sec */ |
583 | bfd_vma, /* src_offset */ | |
584 | asection *, /* target_sec */ | |
585 | bfd_vma, /* target_offset */ | |
586 | void *); /* closure */ | |
e0001a05 | 587 | |
e0001a05 | 588 | extern bfd_boolean xtensa_callback_required_dependence |
0c7a8e5a | 589 | (bfd *, asection *, struct bfd_link_info *, deps_callback_t, void *); |
7fa3d080 | 590 | static void xtensa_ldlang_clear_addresses (lang_statement_union_type *); |
e0001a05 | 591 | static bfd_boolean ld_local_file_relocations_fit |
0c7a8e5a | 592 | (lang_statement_union_type *, const reloc_deps_graph *); |
e0001a05 | 593 | static bfd_vma ld_assign_relative_paged_dot |
0c7a8e5a AM |
594 | (bfd_vma, lang_statement_union_type *, const reloc_deps_graph *, |
595 | bfd_boolean); | |
e0001a05 | 596 | static bfd_vma ld_xtensa_insert_page_offsets |
0c7a8e5a | 597 | (bfd_vma, lang_statement_union_type *, reloc_deps_graph *, bfd_boolean); |
e0001a05 | 598 | #if EXTRA_VALIDATION |
7fa3d080 | 599 | static size_t ld_count_children (lang_statement_union_type *); |
e0001a05 | 600 | #endif |
e0001a05 NC |
601 | |
602 | extern lang_statement_list_type constructor_list; | |
603 | ||
604 | /* Begin verbatim code from ldlang.c: | |
605 | the following are copied from ldlang.c because they are defined | |
606 | there statically. */ | |
607 | ||
608 | static void | |
0c7a8e5a AM |
609 | lang_for_each_statement_worker (void (*func) (lang_statement_union_type *), |
610 | lang_statement_union_type *s) | |
e0001a05 NC |
611 | { |
612 | for (; s != (lang_statement_union_type *) NULL; s = s->header.next) | |
613 | { | |
614 | func (s); | |
615 | ||
616 | switch (s->header.type) | |
0c7a8e5a AM |
617 | { |
618 | case lang_constructors_statement_enum: | |
619 | lang_for_each_statement_worker (func, constructor_list.head); | |
620 | break; | |
621 | case lang_output_section_statement_enum: | |
622 | lang_for_each_statement_worker | |
623 | (func, | |
624 | s->output_section_statement.children.head); | |
625 | break; | |
626 | case lang_wild_statement_enum: | |
627 | lang_for_each_statement_worker | |
628 | (func, | |
629 | s->wild_statement.children.head); | |
630 | break; | |
631 | case lang_group_statement_enum: | |
632 | lang_for_each_statement_worker (func, | |
633 | s->group_statement.children.head); | |
634 | break; | |
635 | case lang_data_statement_enum: | |
636 | case lang_reloc_statement_enum: | |
637 | case lang_object_symbols_statement_enum: | |
638 | case lang_output_statement_enum: | |
639 | case lang_target_statement_enum: | |
640 | case lang_input_section_enum: | |
641 | case lang_input_statement_enum: | |
642 | case lang_assignment_statement_enum: | |
643 | case lang_padding_statement_enum: | |
644 | case lang_address_statement_enum: | |
645 | case lang_fill_statement_enum: | |
646 | break; | |
647 | default: | |
648 | FAIL (); | |
649 | break; | |
650 | } | |
e0001a05 NC |
651 | } |
652 | } | |
653 | ||
654 | /* End of verbatim code from ldlang.c. */ | |
655 | ||
656 | ||
0c7a8e5a AM |
657 | static reloc_deps_section * |
658 | xtensa_get_section_deps (const reloc_deps_graph *deps ATTRIBUTE_UNUSED, | |
659 | asection *sec) | |
e0001a05 NC |
660 | { |
661 | /* We have a separate function for this so that | |
662 | we could in the future keep a completely independent | |
663 | structure that maps a section to its dependence edges. | |
664 | For now, we place these in the sec->userdata field. */ | |
0c7a8e5a | 665 | reloc_deps_section *sec_deps = sec->userdata; |
e0001a05 NC |
666 | return sec_deps; |
667 | } | |
668 | ||
0c7a8e5a AM |
669 | static void |
670 | xtensa_set_section_deps (const reloc_deps_graph *deps ATTRIBUTE_UNUSED, | |
671 | asection *sec, | |
672 | reloc_deps_section *deps_section) | |
e0001a05 | 673 | { |
0c7a8e5a | 674 | sec->userdata = deps_section; |
e0001a05 NC |
675 | } |
676 | ||
677 | ||
678 | /* This is used to keep a list of all of the sections participating in | |
679 | the graph so we can clean them up quickly. */ | |
680 | ||
0c7a8e5a AM |
681 | static void |
682 | xtensa_append_section_deps (reloc_deps_graph *deps, asection *sec) | |
e0001a05 NC |
683 | { |
684 | if (deps->size <= deps->count) | |
685 | { | |
686 | asection **new_sections; | |
687 | size_t i; | |
688 | size_t new_size; | |
0c7a8e5a | 689 | |
e0001a05 NC |
690 | new_size = deps->size * 2; |
691 | if (new_size == 0) | |
692 | new_size = 20; | |
0c7a8e5a AM |
693 | |
694 | new_sections = xmalloc (sizeof (asection *) * new_size); | |
695 | memset (new_sections, 0, sizeof (asection *) * new_size); | |
696 | for (i = 0; i < deps->count; i++) | |
e0001a05 NC |
697 | { |
698 | new_sections[i] = deps->sections[i]; | |
699 | } | |
700 | if (deps->sections != NULL) | |
701 | free (deps->sections); | |
702 | deps->sections = new_sections; | |
703 | deps->size = new_size; | |
704 | } | |
705 | deps->sections[deps->count] = sec; | |
706 | deps->count++; | |
707 | } | |
708 | ||
709 | ||
0c7a8e5a AM |
710 | static void |
711 | free_reloc_deps_graph (reloc_deps_graph *deps) | |
e0001a05 NC |
712 | { |
713 | size_t i; | |
714 | for (i = 0; i < deps->count; i++) | |
715 | { | |
716 | asection *sec = deps->sections[i]; | |
717 | reloc_deps_section *sec_deps; | |
718 | sec_deps = xtensa_get_section_deps (deps, sec); | |
0c7a8e5a | 719 | if (sec_deps) |
e0001a05 NC |
720 | { |
721 | reloc_deps_e *next; | |
722 | while (sec_deps->succs != NULL) | |
723 | { | |
724 | next = sec_deps->succs->next; | |
725 | free (sec_deps->succs); | |
726 | sec_deps->succs = next; | |
727 | } | |
0c7a8e5a | 728 | |
e0001a05 NC |
729 | while (sec_deps->preds != NULL) |
730 | { | |
731 | next = sec_deps->preds->next; | |
732 | free (sec_deps->preds); | |
733 | sec_deps->preds = next; | |
734 | } | |
735 | free (sec_deps); | |
736 | } | |
737 | xtensa_set_section_deps (deps, sec, NULL); | |
738 | } | |
739 | if (deps->sections) | |
740 | free (deps->sections); | |
741 | ||
742 | free (deps); | |
743 | } | |
744 | ||
745 | ||
0c7a8e5a AM |
746 | static bfd_boolean |
747 | section_is_source (const reloc_deps_graph *deps ATTRIBUTE_UNUSED, | |
748 | lang_statement_union_type *s) | |
e0001a05 NC |
749 | { |
750 | asection *sec; | |
751 | const reloc_deps_section *sec_deps; | |
752 | ||
753 | if (s->header.type != lang_input_section_enum) | |
754 | return FALSE; | |
755 | sec = s->input_section.section; | |
756 | ||
757 | sec_deps = xtensa_get_section_deps (deps, sec); | |
0c7a8e5a | 758 | return sec_deps && sec_deps->succs != NULL; |
e0001a05 NC |
759 | } |
760 | ||
761 | ||
0c7a8e5a AM |
762 | static bfd_boolean |
763 | section_is_target (const reloc_deps_graph *deps ATTRIBUTE_UNUSED, | |
764 | lang_statement_union_type *s) | |
e0001a05 NC |
765 | { |
766 | asection *sec; | |
767 | const reloc_deps_section *sec_deps; | |
768 | ||
769 | if (s->header.type != lang_input_section_enum) | |
770 | return FALSE; | |
771 | sec = s->input_section.section; | |
772 | ||
773 | sec_deps = xtensa_get_section_deps (deps, sec); | |
0c7a8e5a | 774 | return sec_deps && sec_deps->preds != NULL; |
e0001a05 NC |
775 | } |
776 | ||
7fa3d080 | 777 | |
0c7a8e5a AM |
778 | static bfd_boolean |
779 | section_is_source_or_target (const reloc_deps_graph *deps ATTRIBUTE_UNUSED, | |
780 | lang_statement_union_type *s) | |
e0001a05 NC |
781 | { |
782 | return (section_is_source (deps, s) | |
783 | || section_is_target (deps, s)); | |
784 | } | |
785 | ||
786 | ||
787 | typedef struct xtensa_ld_iter_stack_t xtensa_ld_iter_stack; | |
788 | typedef struct xtensa_ld_iter_t xtensa_ld_iter; | |
789 | ||
790 | struct xtensa_ld_iter_t | |
791 | { | |
792 | lang_statement_union_type *parent; /* Parent of the list. */ | |
793 | lang_statement_list_type *l; /* List that holds it. */ | |
794 | lang_statement_union_type **loc; /* Place in the list. */ | |
795 | }; | |
796 | ||
797 | struct xtensa_ld_iter_stack_t | |
798 | { | |
799 | xtensa_ld_iter iterloc; /* List that hold it. */ | |
0c7a8e5a | 800 | |
e0001a05 NC |
801 | xtensa_ld_iter_stack *next; /* Next in the stack. */ |
802 | xtensa_ld_iter_stack *prev; /* Back pointer for stack. */ | |
803 | }; | |
804 | ||
e0001a05 | 805 | |
0c7a8e5a AM |
806 | static void |
807 | ld_xtensa_move_section_after (xtensa_ld_iter *to, xtensa_ld_iter *current) | |
e0001a05 NC |
808 | { |
809 | lang_statement_union_type *to_next; | |
810 | lang_statement_union_type *current_next; | |
811 | lang_statement_union_type **e; | |
812 | ||
813 | #if EXTRA_VALIDATION | |
814 | size_t old_to_count, new_to_count; | |
815 | size_t old_current_count, new_current_count; | |
816 | #endif | |
817 | ||
818 | if (to == current) | |
819 | return; | |
0c7a8e5a | 820 | |
e0001a05 NC |
821 | #if EXTRA_VALIDATION |
822 | old_to_count = ld_count_children (to->parent); | |
823 | old_current_count = ld_count_children (current->parent); | |
824 | #endif | |
825 | ||
826 | to_next = *(to->loc); | |
827 | current_next = (*current->loc)->header.next; | |
0c7a8e5a | 828 | |
e0001a05 | 829 | *(to->loc) = *(current->loc); |
0c7a8e5a | 830 | |
e0001a05 NC |
831 | *(current->loc) = current_next; |
832 | (*(to->loc))->header.next = to_next; | |
833 | ||
834 | /* reset "to" list tail */ | |
835 | for (e = &to->l->head; *e != NULL; e = &(*e)->header.next) | |
836 | ; | |
837 | to->l->tail = e; | |
838 | ||
839 | /* reset "current" list tail */ | |
840 | for (e = ¤t->l->head; *e != NULL; e = &(*e)->header.next) | |
841 | ; | |
842 | current->l->tail = e; | |
843 | ||
844 | #if EXTRA_VALIDATION | |
845 | new_to_count = ld_count_children (to->parent); | |
846 | new_current_count = ld_count_children (current->parent); | |
847 | ||
0c7a8e5a | 848 | ASSERT ((old_to_count + old_current_count) |
e0001a05 NC |
849 | == (new_to_count + new_current_count)); |
850 | #endif | |
851 | } | |
852 | ||
853 | ||
854 | /* Can only be called with lang_statements that have lists. Returns | |
43cd72b9 | 855 | FALSE if the list is empty. */ |
e0001a05 | 856 | |
0c7a8e5a AM |
857 | static bfd_boolean |
858 | iter_stack_empty (xtensa_ld_iter_stack **stack_p) | |
e0001a05 | 859 | { |
0c7a8e5a | 860 | return *stack_p == NULL; |
e0001a05 NC |
861 | } |
862 | ||
863 | ||
864 | static bfd_boolean | |
0c7a8e5a AM |
865 | iter_stack_push (xtensa_ld_iter_stack **stack_p, |
866 | lang_statement_union_type *parent) | |
e0001a05 NC |
867 | { |
868 | xtensa_ld_iter_stack *stack; | |
869 | lang_statement_list_type *l = NULL; | |
870 | ||
0c7a8e5a | 871 | switch (parent->header.type) |
e0001a05 NC |
872 | { |
873 | case lang_output_section_statement_enum: | |
874 | l = &parent->output_section_statement.children; | |
875 | break; | |
876 | case lang_wild_statement_enum: | |
877 | l = &parent->wild_statement.children; | |
878 | break; | |
879 | case lang_group_statement_enum: | |
880 | l = &parent->group_statement.children; | |
881 | break; | |
882 | default: | |
883 | ASSERT (0); | |
884 | return FALSE; | |
885 | } | |
886 | ||
887 | /* Empty. do not push. */ | |
0c7a8e5a | 888 | if (l->tail == &l->head) |
e0001a05 NC |
889 | return FALSE; |
890 | ||
0c7a8e5a | 891 | stack = xmalloc (sizeof (xtensa_ld_iter_stack)); |
e0001a05 NC |
892 | memset (stack, 0, sizeof (xtensa_ld_iter_stack)); |
893 | stack->iterloc.parent = parent; | |
894 | stack->iterloc.l = l; | |
895 | stack->iterloc.loc = &l->head; | |
896 | ||
897 | stack->next = *stack_p; | |
898 | stack->prev = NULL; | |
0c7a8e5a | 899 | if (*stack_p != NULL) |
e0001a05 NC |
900 | (*stack_p)->prev = stack; |
901 | *stack_p = stack; | |
902 | return TRUE; | |
903 | } | |
904 | ||
905 | ||
0c7a8e5a AM |
906 | static void |
907 | iter_stack_pop (xtensa_ld_iter_stack **stack_p) | |
e0001a05 NC |
908 | { |
909 | xtensa_ld_iter_stack *stack; | |
910 | ||
911 | stack = *stack_p; | |
912 | ||
0c7a8e5a | 913 | if (stack == NULL) |
e0001a05 NC |
914 | { |
915 | ASSERT (stack != NULL); | |
916 | return; | |
917 | } | |
918 | ||
0c7a8e5a | 919 | if (stack->next != NULL) |
e0001a05 NC |
920 | stack->next->prev = NULL; |
921 | ||
922 | *stack_p = stack->next; | |
923 | free (stack); | |
924 | } | |
925 | ||
926 | ||
927 | /* This MUST be called if, during iteration, the user changes the | |
928 | underlying structure. It will check for a NULL current and advance | |
929 | accordingly. */ | |
930 | ||
931 | static void | |
0c7a8e5a | 932 | iter_stack_update (xtensa_ld_iter_stack **stack_p) |
e0001a05 NC |
933 | { |
934 | if (!iter_stack_empty (stack_p) | |
0c7a8e5a | 935 | && (*(*stack_p)->iterloc.loc) == NULL) |
e0001a05 NC |
936 | { |
937 | iter_stack_pop (stack_p); | |
938 | ||
939 | while (!iter_stack_empty (stack_p) | |
940 | && ((*(*stack_p)->iterloc.loc)->header.next == NULL)) | |
941 | { | |
942 | iter_stack_pop (stack_p); | |
943 | } | |
944 | if (!iter_stack_empty (stack_p)) | |
945 | (*stack_p)->iterloc.loc = &(*(*stack_p)->iterloc.loc)->header.next; | |
946 | } | |
947 | } | |
948 | ||
949 | ||
0c7a8e5a AM |
950 | static void |
951 | iter_stack_next (xtensa_ld_iter_stack **stack_p) | |
e0001a05 NC |
952 | { |
953 | xtensa_ld_iter_stack *stack; | |
954 | lang_statement_union_type *current; | |
955 | stack = *stack_p; | |
956 | ||
957 | current = *stack->iterloc.loc; | |
958 | /* If we are on the first element. */ | |
0c7a8e5a | 959 | if (current != NULL) |
e0001a05 | 960 | { |
0c7a8e5a | 961 | switch (current->header.type) |
e0001a05 NC |
962 | { |
963 | case lang_output_section_statement_enum: | |
964 | case lang_wild_statement_enum: | |
965 | case lang_group_statement_enum: | |
966 | /* If the list if not empty, we are done. */ | |
967 | if (iter_stack_push (stack_p, *stack->iterloc.loc)) | |
968 | return; | |
969 | /* Otherwise increment the pointer as normal. */ | |
970 | break; | |
971 | default: | |
972 | break; | |
973 | } | |
974 | } | |
975 | ||
976 | while (!iter_stack_empty (stack_p) | |
977 | && ((*(*stack_p)->iterloc.loc)->header.next == NULL)) | |
978 | { | |
979 | iter_stack_pop (stack_p); | |
980 | } | |
981 | if (!iter_stack_empty (stack_p)) | |
982 | (*stack_p)->iterloc.loc = &(*(*stack_p)->iterloc.loc)->header.next; | |
983 | } | |
984 | ||
985 | ||
986 | static lang_statement_union_type * | |
0c7a8e5a | 987 | iter_stack_current (xtensa_ld_iter_stack **stack_p) |
e0001a05 NC |
988 | { |
989 | return *((*stack_p)->iterloc.loc); | |
990 | } | |
991 | ||
992 | ||
993 | /* The iter stack is a preorder. */ | |
994 | ||
0c7a8e5a AM |
995 | static void |
996 | iter_stack_create (xtensa_ld_iter_stack **stack_p, | |
997 | lang_statement_union_type *parent) | |
e0001a05 NC |
998 | { |
999 | iter_stack_push (stack_p, parent); | |
1000 | } | |
1001 | ||
1002 | ||
0c7a8e5a | 1003 | static void |
7fa3d080 | 1004 | iter_stack_copy_current (xtensa_ld_iter_stack **stack_p, xtensa_ld_iter *front) |
e0001a05 NC |
1005 | { |
1006 | *front = (*stack_p)->iterloc; | |
1007 | } | |
1008 | ||
1009 | ||
0c7a8e5a AM |
1010 | static void |
1011 | xtensa_colocate_literals (reloc_deps_graph *deps, | |
1012 | lang_statement_union_type *statement) | |
e0001a05 NC |
1013 | { |
1014 | /* Keep a stack of pointers to control iteration through the contours. */ | |
1015 | xtensa_ld_iter_stack *stack = NULL; | |
1016 | xtensa_ld_iter_stack **stack_p = &stack; | |
1017 | ||
1018 | xtensa_ld_iter front; /* Location where new insertion should occur. */ | |
1019 | xtensa_ld_iter *front_p = NULL; | |
1020 | ||
1021 | xtensa_ld_iter current; /* Location we are checking. */ | |
1022 | xtensa_ld_iter *current_p = NULL; | |
1023 | bfd_boolean in_literals = FALSE; | |
1024 | ||
1025 | if (deps->count == 0) | |
1026 | return; | |
1027 | ||
e0001a05 NC |
1028 | iter_stack_create (stack_p, statement); |
1029 | ||
0c7a8e5a | 1030 | while (!iter_stack_empty (stack_p)) |
e0001a05 NC |
1031 | { |
1032 | bfd_boolean skip_increment = FALSE; | |
1033 | lang_statement_union_type *l = iter_stack_current (stack_p); | |
0c7a8e5a AM |
1034 | |
1035 | switch (l->header.type) | |
e0001a05 NC |
1036 | { |
1037 | case lang_assignment_statement_enum: | |
1038 | /* Any assignment statement should block reordering across it. */ | |
1039 | front_p = NULL; | |
1040 | in_literals = FALSE; | |
1041 | break; | |
1042 | ||
1043 | case lang_input_section_enum: | |
1044 | if (front_p == NULL) | |
1045 | { | |
1046 | in_literals = (section_is_target (deps, l) | |
1047 | && !section_is_source (deps, l)); | |
0c7a8e5a | 1048 | if (in_literals) |
e0001a05 NC |
1049 | { |
1050 | front_p = &front; | |
1051 | iter_stack_copy_current (stack_p, front_p); | |
1052 | } | |
0c7a8e5a | 1053 | } |
e0001a05 NC |
1054 | else |
1055 | { | |
1056 | bfd_boolean is_target; | |
1057 | current_p = ¤t; | |
1058 | iter_stack_copy_current (stack_p, current_p); | |
1059 | is_target = (section_is_target (deps, l) | |
1060 | && !section_is_source (deps, l)); | |
1061 | ||
1062 | if (in_literals) | |
1063 | { | |
1064 | iter_stack_copy_current (stack_p, front_p); | |
1065 | if (!is_target) | |
1066 | in_literals = FALSE; | |
1067 | } | |
1068 | else | |
1069 | { | |
0c7a8e5a | 1070 | if (is_target) |
e0001a05 NC |
1071 | { |
1072 | /* Try to insert in place. */ | |
1073 | ld_xtensa_move_section_after (front_p, current_p); | |
0c7a8e5a | 1074 | ld_assign_relative_paged_dot (0x100000, |
e0001a05 NC |
1075 | statement, |
1076 | deps, | |
1077 | xtensa_use_literal_pages); | |
0c7a8e5a | 1078 | |
e0001a05 NC |
1079 | /* We use this code because it's already written. */ |
1080 | if (!ld_local_file_relocations_fit (statement, deps)) | |
1081 | { | |
1082 | /* Move it back. */ | |
1083 | ld_xtensa_move_section_after (current_p, front_p); | |
1084 | /* Reset the literal placement. */ | |
1085 | iter_stack_copy_current (stack_p, front_p); | |
1086 | } | |
0c7a8e5a | 1087 | else |
e0001a05 NC |
1088 | { |
1089 | /* Move front pointer up by one. */ | |
1090 | front_p->loc = &(*front_p->loc)->header.next; | |
1091 | ||
1092 | /* Do not increment the current pointer. */ | |
1093 | skip_increment = TRUE; | |
1094 | } | |
1095 | } | |
1096 | } | |
1097 | } | |
1098 | break; | |
1099 | default: | |
1100 | break; | |
1101 | } | |
1102 | ||
1103 | if (!skip_increment) | |
1104 | iter_stack_next (stack_p); | |
1105 | else | |
1106 | /* Be careful to update the stack_p if it now is a null. */ | |
1107 | iter_stack_update (stack_p); | |
1108 | } | |
0c7a8e5a | 1109 | |
e0001a05 NC |
1110 | lang_for_each_statement_worker (xtensa_ldlang_clear_addresses, statement); |
1111 | } | |
1112 | ||
1113 | ||
0c7a8e5a AM |
1114 | static void |
1115 | xtensa_move_dependencies_to_front (reloc_deps_graph *deps, | |
1116 | lang_wild_statement_type *w) | |
e0001a05 NC |
1117 | { |
1118 | /* Keep a front pointer and a current pointer. */ | |
1119 | lang_statement_union_type **front; | |
1120 | lang_statement_union_type **current; | |
1121 | ||
1122 | /* Walk to the end of the targets. */ | |
1123 | for (front = &w->children.head; | |
1124 | (*front != NULL) && section_is_source_or_target (deps, *front); | |
1125 | front = &(*front)->header.next) | |
1126 | ; | |
1127 | ||
1128 | if (*front == NULL) | |
1129 | return; | |
1130 | ||
1131 | current = &(*front)->header.next; | |
0c7a8e5a | 1132 | while (*current != NULL) |
e0001a05 NC |
1133 | { |
1134 | if (section_is_source_or_target (deps, *current)) | |
1135 | { | |
1136 | /* Insert in place. */ | |
1137 | xtensa_ld_iter front_iter; | |
1138 | xtensa_ld_iter current_iter; | |
1139 | ||
1140 | front_iter.parent = (lang_statement_union_type *) w; | |
1141 | front_iter.l = &w->children; | |
1142 | front_iter.loc = front; | |
1143 | ||
1144 | current_iter.parent = (lang_statement_union_type *) w; | |
1145 | current_iter.l = &w->children; | |
1146 | current_iter.loc = current; | |
1147 | ||
1148 | ld_xtensa_move_section_after (&front_iter, ¤t_iter); | |
1149 | front = &(*front)->header.next; | |
1150 | } | |
1151 | else | |
1152 | { | |
1153 | current = &(*current)->header.next; | |
1154 | } | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | ||
1159 | static bfd_boolean | |
7fa3d080 | 1160 | deps_has_sec_edge (const reloc_deps_graph *deps, asection *src, asection *tgt) |
e0001a05 NC |
1161 | { |
1162 | const reloc_deps_section *sec_deps; | |
1163 | const reloc_deps_e *sec_deps_e; | |
1164 | ||
1165 | sec_deps = xtensa_get_section_deps (deps, src); | |
1166 | if (sec_deps == NULL) | |
1167 | return FALSE; | |
0c7a8e5a | 1168 | |
e0001a05 | 1169 | for (sec_deps_e = sec_deps->succs; |
0c7a8e5a | 1170 | sec_deps_e != NULL; |
e0001a05 NC |
1171 | sec_deps_e = sec_deps_e->next) |
1172 | { | |
1173 | ASSERT (sec_deps_e->src == src); | |
0c7a8e5a | 1174 | if (sec_deps_e->tgt == tgt) |
e0001a05 NC |
1175 | return TRUE; |
1176 | } | |
1177 | return FALSE; | |
1178 | } | |
1179 | ||
1180 | ||
1181 | static bfd_boolean | |
0c7a8e5a AM |
1182 | deps_has_edge (const reloc_deps_graph *deps, |
1183 | lang_statement_union_type *src, | |
1184 | lang_statement_union_type *tgt) | |
e0001a05 NC |
1185 | { |
1186 | if (!section_is_source (deps, src)) | |
1187 | return FALSE; | |
1188 | if (!section_is_target (deps, tgt)) | |
1189 | return FALSE; | |
1190 | ||
1191 | if (src->header.type != lang_input_section_enum) | |
1192 | return FALSE; | |
1193 | if (tgt->header.type != lang_input_section_enum) | |
1194 | return FALSE; | |
0c7a8e5a | 1195 | |
e0001a05 NC |
1196 | return deps_has_sec_edge (deps, src->input_section.section, |
1197 | tgt->input_section.section); | |
1198 | } | |
1199 | ||
1200 | ||
1201 | static void | |
7fa3d080 | 1202 | add_deps_edge (reloc_deps_graph *deps, asection *src_sec, asection *tgt_sec) |
e0001a05 NC |
1203 | { |
1204 | reloc_deps_section *src_sec_deps; | |
1205 | reloc_deps_section *tgt_sec_deps; | |
1206 | ||
1207 | reloc_deps_e *src_edge; | |
1208 | reloc_deps_e *tgt_edge; | |
1209 | ||
1210 | if (deps_has_sec_edge (deps, src_sec, tgt_sec)) | |
1211 | return; | |
0c7a8e5a | 1212 | |
e0001a05 NC |
1213 | src_sec_deps = xtensa_get_section_deps (deps, src_sec); |
1214 | if (src_sec_deps == NULL) | |
1215 | { | |
1216 | /* Add a section. */ | |
0c7a8e5a | 1217 | src_sec_deps = xmalloc (sizeof (reloc_deps_section)); |
e0001a05 NC |
1218 | memset (src_sec_deps, 0, sizeof (reloc_deps_section)); |
1219 | src_sec_deps->is_only_literal = 0; | |
1220 | src_sec_deps->preds = NULL; | |
1221 | src_sec_deps->succs = NULL; | |
1222 | xtensa_set_section_deps (deps, src_sec, src_sec_deps); | |
1223 | xtensa_append_section_deps (deps, src_sec); | |
1224 | } | |
1225 | ||
1226 | tgt_sec_deps = xtensa_get_section_deps (deps, tgt_sec); | |
1227 | if (tgt_sec_deps == NULL) | |
1228 | { | |
1229 | /* Add a section. */ | |
0c7a8e5a | 1230 | tgt_sec_deps = xmalloc (sizeof (reloc_deps_section)); |
e0001a05 NC |
1231 | memset (tgt_sec_deps, 0, sizeof (reloc_deps_section)); |
1232 | tgt_sec_deps->is_only_literal = 0; | |
1233 | tgt_sec_deps->preds = NULL; | |
1234 | tgt_sec_deps->succs = NULL; | |
1235 | xtensa_set_section_deps (deps, tgt_sec, tgt_sec_deps); | |
1236 | xtensa_append_section_deps (deps, tgt_sec); | |
1237 | } | |
1238 | ||
1239 | /* Add the edges. */ | |
0c7a8e5a | 1240 | src_edge = xmalloc (sizeof (reloc_deps_e)); |
e0001a05 NC |
1241 | memset (src_edge, 0, sizeof (reloc_deps_e)); |
1242 | src_edge->src = src_sec; | |
1243 | src_edge->tgt = tgt_sec; | |
1244 | src_edge->next = src_sec_deps->succs; | |
1245 | src_sec_deps->succs = src_edge; | |
1246 | ||
0c7a8e5a | 1247 | tgt_edge = xmalloc (sizeof (reloc_deps_e)); |
e0001a05 NC |
1248 | memset (tgt_edge, 0, sizeof (reloc_deps_e)); |
1249 | tgt_edge->src = src_sec; | |
1250 | tgt_edge->tgt = tgt_sec; | |
1251 | tgt_edge->next = tgt_sec_deps->preds; | |
1252 | tgt_sec_deps->preds = tgt_edge; | |
1253 | } | |
1254 | ||
1255 | ||
0c7a8e5a AM |
1256 | static void |
1257 | build_deps_graph_callback (asection *src_sec, | |
1258 | bfd_vma src_offset ATTRIBUTE_UNUSED, | |
1259 | asection *target_sec, | |
1260 | bfd_vma target_offset ATTRIBUTE_UNUSED, | |
1261 | void *closure) | |
e0001a05 | 1262 | { |
0c7a8e5a | 1263 | reloc_deps_graph *deps = closure; |
e0001a05 NC |
1264 | |
1265 | /* If the target is defined. */ | |
1266 | if (target_sec != NULL) | |
1267 | add_deps_edge (deps, src_sec, target_sec); | |
1268 | } | |
1269 | ||
1270 | ||
0c7a8e5a AM |
1271 | static reloc_deps_graph * |
1272 | ld_build_required_section_dependence (lang_statement_union_type *s) | |
e0001a05 NC |
1273 | { |
1274 | reloc_deps_graph *deps; | |
1275 | xtensa_ld_iter_stack *stack = NULL; | |
1276 | ||
0c7a8e5a | 1277 | deps = xmalloc (sizeof (reloc_deps_graph)); |
e0001a05 NC |
1278 | deps->sections = NULL; |
1279 | deps->count = 0; | |
1280 | deps->size = 0; | |
0c7a8e5a | 1281 | |
e0001a05 NC |
1282 | for (iter_stack_create (&stack, s); |
1283 | !iter_stack_empty (&stack); | |
0c7a8e5a | 1284 | iter_stack_next (&stack)) |
e0001a05 NC |
1285 | { |
1286 | lang_statement_union_type *l = iter_stack_current (&stack); | |
1287 | ||
1288 | if (l->header.type == lang_input_section_enum) | |
1289 | { | |
1290 | lang_input_section_type *input; | |
1291 | input = &l->input_section; | |
7b986e99 | 1292 | xtensa_callback_required_dependence (input->section->owner, |
e0001a05 NC |
1293 | input->section, |
1294 | &link_info, | |
1295 | /* Use the same closure. */ | |
1296 | build_deps_graph_callback, | |
0c7a8e5a | 1297 | deps); |
e0001a05 NC |
1298 | } |
1299 | } | |
1300 | return deps; | |
1301 | } | |
1302 | ||
1303 | ||
1304 | #if EXTRA_VALIDATION | |
0c7a8e5a AM |
1305 | static size_t |
1306 | ld_count_children (lang_statement_union_type *s) | |
e0001a05 NC |
1307 | { |
1308 | size_t count = 0; | |
1309 | xtensa_ld_iter_stack *stack = NULL; | |
1310 | for (iter_stack_create (&stack, s); | |
1311 | !iter_stack_empty (&stack); | |
0c7a8e5a | 1312 | iter_stack_next (&stack)) |
e0001a05 NC |
1313 | { |
1314 | lang_statement_union_type *l = iter_stack_current (&stack); | |
1315 | ASSERT (l != NULL); | |
1316 | count++; | |
1317 | } | |
1318 | return count; | |
1319 | } | |
1320 | #endif /* EXTRA_VALIDATION */ | |
1321 | ||
1322 | ||
a255b6c7 BW |
1323 | /* Check if a particular section is included in the link. This will only |
1324 | be true for one instance of a particular linkonce section. */ | |
1325 | ||
1326 | static bfd_boolean input_section_found = FALSE; | |
1327 | static asection *input_section_target = NULL; | |
1328 | ||
1329 | static void | |
1330 | input_section_linked_worker (lang_statement_union_type *statement) | |
1331 | { | |
1332 | if ((statement->header.type == lang_input_section_enum | |
1333 | && (statement->input_section.section == input_section_target))) | |
1334 | input_section_found = TRUE; | |
1335 | } | |
1336 | ||
1337 | static bfd_boolean | |
1338 | input_section_linked (asection *sec) | |
1339 | { | |
1340 | input_section_found = FALSE; | |
1341 | input_section_target = sec; | |
1342 | lang_for_each_statement_worker (input_section_linked_worker, stat_ptr->head); | |
1343 | return input_section_found; | |
1344 | } | |
1345 | ||
1346 | ||
a77dc2cc | 1347 | /* Strip out any linkonce property tables or XCC exception tables where the |
a255b6c7 BW |
1348 | associated linkonce text is from a different object file. Normally, |
1349 | a matching set of linkonce sections is taken from the same object file, | |
1350 | but sometimes the files are compiled differently so that some of the | |
1351 | linkonce sections are not present in all files. Stripping the | |
1352 | inconsistent sections like this is not completely robust -- a much | |
1353 | better solution is to use comdat groups. */ | |
1354 | ||
1355 | static int linkonce_len = sizeof (".gnu.linkonce.") - 1; | |
1356 | ||
1357 | static bfd_boolean | |
1358 | is_inconsistent_linkonce_section (asection *sec) | |
1359 | { | |
1360 | bfd *abfd = sec->owner; | |
1361 | const char *sec_name = bfd_get_section_name (abfd, sec); | |
a77dc2cc | 1362 | const char *name; |
a255b6c7 BW |
1363 | |
1364 | if ((bfd_get_section_flags (abfd, sec) & SEC_LINK_ONCE) == 0 | |
1365 | || strncmp (sec_name, ".gnu.linkonce.", linkonce_len) != 0) | |
1366 | return FALSE; | |
1367 | ||
a77dc2cc BW |
1368 | /* Check if this is an Xtensa property section or an exception table |
1369 | for Tensilica's XCC compiler. */ | |
1370 | name = sec_name + linkonce_len; | |
1371 | if (CONST_STRNEQ (name, "prop.")) | |
1372 | name = strchr (name + 5, '.') + 1; | |
1373 | else if (name[1] == '.' | |
1374 | && (name[0] == 'p' || name[0] == 'e' || name[0] == 'h')) | |
1375 | name += 2; | |
1376 | else | |
1377 | name = 0; | |
644143c8 BW |
1378 | |
1379 | if (name) | |
a255b6c7 | 1380 | { |
644143c8 | 1381 | char *dep_sec_name = xmalloc (strlen (sec_name) + 1); |
a255b6c7 BW |
1382 | asection *dep_sec; |
1383 | ||
1384 | /* Get the associated linkonce text section and check if it is | |
1385 | included in the link. If not, this section is inconsistent | |
1386 | and should be stripped. */ | |
644143c8 BW |
1387 | strcpy (dep_sec_name, ".gnu.linkonce.t."); |
1388 | strcat (dep_sec_name, name); | |
a255b6c7 BW |
1389 | dep_sec = bfd_get_section_by_name (abfd, dep_sec_name); |
1390 | if (dep_sec == NULL || ! input_section_linked (dep_sec)) | |
1391 | { | |
1392 | free (dep_sec_name); | |
1393 | return TRUE; | |
1394 | } | |
1395 | free (dep_sec_name); | |
1396 | } | |
1397 | ||
1398 | return FALSE; | |
1399 | } | |
1400 | ||
1401 | ||
1402 | static void | |
1403 | xtensa_strip_inconsistent_linkonce_sections (lang_statement_list_type *slist) | |
1404 | { | |
1405 | lang_statement_union_type **s_p = &slist->head; | |
1406 | while (*s_p) | |
1407 | { | |
1408 | lang_statement_union_type *s = *s_p; | |
1409 | lang_statement_union_type *s_next = (*s_p)->header.next; | |
1410 | ||
1411 | switch (s->header.type) | |
1412 | { | |
1413 | case lang_input_section_enum: | |
1414 | if (is_inconsistent_linkonce_section (s->input_section.section)) | |
1415 | { | |
b2f28975 | 1416 | s->input_section.section->output_section = bfd_abs_section_ptr; |
a255b6c7 BW |
1417 | *s_p = s_next; |
1418 | continue; | |
1419 | } | |
1420 | break; | |
1421 | ||
1422 | case lang_constructors_statement_enum: | |
1423 | xtensa_strip_inconsistent_linkonce_sections (&constructor_list); | |
1424 | break; | |
1425 | ||
1426 | case lang_output_section_statement_enum: | |
1427 | if (s->output_section_statement.children.head) | |
1428 | xtensa_strip_inconsistent_linkonce_sections | |
1429 | (&s->output_section_statement.children); | |
1430 | break; | |
1431 | ||
1432 | case lang_wild_statement_enum: | |
1433 | xtensa_strip_inconsistent_linkonce_sections | |
1434 | (&s->wild_statement.children); | |
1435 | break; | |
1436 | ||
1437 | case lang_group_statement_enum: | |
1438 | xtensa_strip_inconsistent_linkonce_sections | |
1439 | (&s->group_statement.children); | |
1440 | break; | |
1441 | ||
1442 | case lang_data_statement_enum: | |
1443 | case lang_reloc_statement_enum: | |
1444 | case lang_object_symbols_statement_enum: | |
1445 | case lang_output_statement_enum: | |
1446 | case lang_target_statement_enum: | |
1447 | case lang_input_statement_enum: | |
1448 | case lang_assignment_statement_enum: | |
1449 | case lang_padding_statement_enum: | |
1450 | case lang_address_statement_enum: | |
1451 | case lang_fill_statement_enum: | |
1452 | break; | |
1453 | ||
1454 | default: | |
1455 | FAIL (); | |
1456 | break; | |
1457 | } | |
1458 | ||
1459 | s_p = &(*s_p)->header.next; | |
1460 | } | |
1461 | ||
1462 | /* Reset the tail of the list, in case the last entry was removed. */ | |
1463 | if (s_p != slist->tail) | |
1464 | slist->tail = s_p; | |
1465 | } | |
1466 | ||
1467 | ||
0c7a8e5a AM |
1468 | static void |
1469 | xtensa_wild_group_interleave_callback (lang_statement_union_type *statement) | |
e0001a05 NC |
1470 | { |
1471 | lang_wild_statement_type *w; | |
1472 | reloc_deps_graph *deps; | |
1473 | if (statement->header.type == lang_wild_statement_enum) | |
1474 | { | |
1475 | #if EXTRA_VALIDATION | |
1476 | size_t old_child_count; | |
1477 | size_t new_child_count; | |
1478 | #endif | |
1479 | bfd_boolean no_reorder; | |
1480 | ||
1481 | w = &statement->wild_statement; | |
1482 | ||
1483 | no_reorder = FALSE; | |
1484 | ||
1485 | /* If it has 0 or 1 section bound, then do not reorder. */ | |
1486 | if (w->children.head == NULL | |
1487 | || (w->children.head->header.type == lang_input_section_enum | |
1488 | && w->children.head->header.next == NULL)) | |
1489 | no_reorder = TRUE; | |
1490 | ||
1491 | if (w->filenames_sorted) | |
1492 | no_reorder = TRUE; | |
1493 | ||
1494 | /* Check for sorting in a section list wildcard spec as well. */ | |
1495 | if (!no_reorder) | |
1496 | { | |
1497 | struct wildcard_list *l; | |
1498 | for (l = w->section_list; l != NULL; l = l->next) | |
1499 | { | |
1500 | if (l->spec.sorted == TRUE) | |
1501 | { | |
1502 | no_reorder = TRUE; | |
1503 | break; | |
1504 | } | |
1505 | } | |
0c7a8e5a | 1506 | } |
e0001a05 NC |
1507 | |
1508 | /* Special case until the NOREORDER linker directive is supported: | |
0c7a8e5a | 1509 | *(.init) output sections and *(.fini) specs may NOT be reordered. */ |
e0001a05 NC |
1510 | |
1511 | /* Check for sorting in a section list wildcard spec as well. */ | |
0c7a8e5a | 1512 | if (!no_reorder) |
e0001a05 NC |
1513 | { |
1514 | struct wildcard_list *l; | |
1515 | for (l = w->section_list; l != NULL; l = l->next) | |
1516 | { | |
1517 | if (l->spec.name | |
1518 | && ((strcmp (".init", l->spec.name) == 0) | |
1519 | || (strcmp (".fini", l->spec.name) == 0))) | |
1520 | { | |
1521 | no_reorder = TRUE; | |
1522 | break; | |
1523 | } | |
1524 | } | |
1525 | } | |
1526 | ||
1527 | #if EXTRA_VALIDATION | |
1528 | old_child_count = ld_count_children (statement); | |
1529 | #endif | |
1530 | ||
1531 | /* It is now officially a target. Build the graph of source | |
0c7a8e5a | 1532 | section -> target section (kept as a list of edges). */ |
e0001a05 NC |
1533 | deps = ld_build_required_section_dependence (statement); |
1534 | ||
1535 | /* If this wildcard does not reorder.... */ | |
1536 | if (!no_reorder && deps->count != 0) | |
1537 | { | |
1538 | /* First check for reverse dependences. Fix if possible. */ | |
1539 | xtensa_layout_wild (deps, w); | |
1540 | ||
1541 | xtensa_move_dependencies_to_front (deps, w); | |
1542 | #if EXTRA_VALIDATION | |
1543 | new_child_count = ld_count_children (statement); | |
1544 | ASSERT (new_child_count == old_child_count); | |
1545 | #endif | |
1546 | ||
1547 | xtensa_colocate_literals (deps, statement); | |
1548 | ||
1549 | #if EXTRA_VALIDATION | |
1550 | new_child_count = ld_count_children (statement); | |
1551 | ASSERT (new_child_count == old_child_count); | |
1552 | #endif | |
1553 | } | |
1554 | ||
1555 | /* Clean up. */ | |
1556 | free_reloc_deps_graph (deps); | |
1557 | } | |
1558 | } | |
1559 | ||
1560 | ||
0c7a8e5a AM |
1561 | static void |
1562 | xtensa_wild_group_interleave (lang_statement_union_type *s) | |
e0001a05 NC |
1563 | { |
1564 | lang_for_each_statement_worker (xtensa_wild_group_interleave_callback, s); | |
1565 | } | |
1566 | ||
1567 | ||
0c7a8e5a | 1568 | static void |
7fa3d080 | 1569 | xtensa_layout_wild (const reloc_deps_graph *deps, lang_wild_statement_type *w) |
e0001a05 NC |
1570 | { |
1571 | /* If it does not fit initially, we need to do this step. Move all | |
1572 | of the wild literal sections to a new list, then move each of | |
1573 | them back in just before the first section they depend on. */ | |
1574 | lang_statement_union_type **s_p; | |
1575 | #if EXTRA_VALIDATION | |
1576 | size_t old_count, new_count; | |
1577 | size_t ct1, ct2; | |
1578 | #endif | |
0c7a8e5a | 1579 | |
e0001a05 NC |
1580 | lang_wild_statement_type literal_wild; |
1581 | literal_wild.header.next = NULL; | |
1582 | literal_wild.header.type = lang_wild_statement_enum; | |
1583 | literal_wild.filename = NULL; | |
1584 | literal_wild.filenames_sorted = FALSE; | |
1585 | literal_wild.section_list = NULL; | |
1586 | literal_wild.keep_sections = FALSE; | |
1587 | literal_wild.children.head = NULL; | |
1588 | literal_wild.children.tail = &literal_wild.children.head; | |
1589 | ||
1590 | #if EXTRA_VALIDATION | |
1591 | old_count = ld_count_children ((lang_statement_union_type*) w); | |
1592 | #endif | |
1593 | ||
1594 | s_p = &w->children.head; | |
1595 | while (*s_p != NULL) | |
1596 | { | |
1597 | lang_statement_union_type *l = *s_p; | |
1598 | if (l->header.type == lang_input_section_enum) | |
1599 | { | |
1600 | if (section_is_target (deps, l) | |
0c7a8e5a | 1601 | && ! section_is_source (deps, l)) |
e0001a05 NC |
1602 | { |
1603 | /* Detach. */ | |
1604 | *s_p = l->header.next; | |
1605 | if (*s_p == NULL) | |
1606 | w->children.tail = s_p; | |
1607 | l->header.next = NULL; | |
1608 | ||
1609 | /* Append. */ | |
1610 | *literal_wild.children.tail = l; | |
1611 | literal_wild.children.tail = &l->header.next; | |
1612 | continue; | |
0c7a8e5a | 1613 | } |
e0001a05 NC |
1614 | } |
1615 | s_p = &(*s_p)->header.next; | |
1616 | } | |
1617 | ||
1618 | #if EXTRA_VALIDATION | |
1619 | ct1 = ld_count_children ((lang_statement_union_type*) w); | |
1620 | ct2 = ld_count_children ((lang_statement_union_type*) &literal_wild); | |
0c7a8e5a | 1621 | |
e0001a05 NC |
1622 | ASSERT (old_count == (ct1 + ct2)); |
1623 | #endif | |
0c7a8e5a | 1624 | |
e0001a05 NC |
1625 | /* Now place them back in front of their dependent sections. */ |
1626 | ||
1627 | while (literal_wild.children.head != NULL) | |
1628 | { | |
1629 | lang_statement_union_type *lit = literal_wild.children.head; | |
1630 | bfd_boolean placed = FALSE; | |
1631 | ||
1632 | #if EXTRA_VALIDATION | |
1633 | ASSERT (ct2 > 0); | |
1634 | ct2--; | |
1635 | #endif | |
1636 | ||
1637 | /* Detach. */ | |
1638 | literal_wild.children.head = lit->header.next; | |
0c7a8e5a | 1639 | if (literal_wild.children.head == NULL) |
e0001a05 NC |
1640 | literal_wild.children.tail = &literal_wild.children.head; |
1641 | lit->header.next = NULL; | |
1642 | ||
1643 | /* Find a spot to place it. */ | |
0c7a8e5a | 1644 | for (s_p = &w->children.head; *s_p != NULL; s_p = &(*s_p)->header.next) |
e0001a05 NC |
1645 | { |
1646 | lang_statement_union_type *src = *s_p; | |
1647 | if (deps_has_edge (deps, src, lit)) | |
1648 | { | |
1649 | /* Place it here. */ | |
1650 | lit->header.next = *s_p; | |
1651 | *s_p = lit; | |
1652 | placed = TRUE; | |
1653 | break; | |
1654 | } | |
1655 | } | |
0c7a8e5a | 1656 | |
e0001a05 NC |
1657 | if (!placed) |
1658 | { | |
1659 | /* Put it at the end. */ | |
1660 | *w->children.tail = lit; | |
1661 | w->children.tail = &lit->header.next; | |
1662 | } | |
1663 | } | |
1664 | ||
1665 | #if EXTRA_VALIDATION | |
1666 | new_count = ld_count_children ((lang_statement_union_type*) w); | |
1667 | ASSERT (new_count == old_count); | |
1668 | #endif | |
1669 | } | |
1670 | ||
1671 | ||
0c7a8e5a AM |
1672 | static void |
1673 | xtensa_colocate_output_literals_callback (lang_statement_union_type *statement) | |
e0001a05 NC |
1674 | { |
1675 | lang_output_section_statement_type *os; | |
1676 | reloc_deps_graph *deps; | |
1677 | if (statement->header.type == lang_output_section_statement_enum) | |
1678 | { | |
1679 | /* Now, we walk over the contours of the output section statement. | |
1680 | ||
1681 | First we build the literal section dependences as before. | |
1682 | ||
1683 | At the first uniquely_literal section, we mark it as a good | |
1684 | spot to place other literals. Continue walking (and counting | |
1685 | sizes) until we find the next literal section. If this | |
1686 | section can be moved to the first one, then we move it. If | |
1687 | we every find a modification of ".", start over. If we find | |
1688 | a labeling of the current location, start over. Finally, at | |
1689 | the end, if we require page alignment, add page alignments. */ | |
1690 | ||
1691 | #if EXTRA_VALIDATION | |
1692 | size_t old_child_count; | |
1693 | size_t new_child_count; | |
1694 | #endif | |
1695 | bfd_boolean no_reorder = FALSE; | |
1696 | ||
1697 | os = &statement->output_section_statement; | |
1698 | ||
1699 | #if EXTRA_VALIDATION | |
1700 | old_child_count = ld_count_children (statement); | |
1701 | #endif | |
1702 | ||
1703 | /* It is now officially a target. Build the graph of source | |
0c7a8e5a | 1704 | section -> target section (kept as a list of edges). */ |
e0001a05 NC |
1705 | |
1706 | deps = ld_build_required_section_dependence (statement); | |
1707 | ||
1708 | /* If this wildcard does not reorder.... */ | |
1709 | if (!no_reorder) | |
1710 | { | |
1711 | /* First check for reverse dependences. Fix if possible. */ | |
1712 | xtensa_colocate_literals (deps, statement); | |
1713 | ||
1714 | #if EXTRA_VALIDATION | |
1715 | new_child_count = ld_count_children (statement); | |
1716 | ASSERT (new_child_count == old_child_count); | |
1717 | #endif | |
1718 | } | |
1719 | ||
1720 | /* Insert align/offset assignment statement. */ | |
1721 | if (xtensa_use_literal_pages) | |
1722 | { | |
0c7a8e5a | 1723 | ld_xtensa_insert_page_offsets (0, statement, deps, |
e0001a05 NC |
1724 | xtensa_use_literal_pages); |
1725 | lang_for_each_statement_worker (xtensa_ldlang_clear_addresses, | |
1726 | statement); | |
1727 | } | |
1728 | ||
1729 | /* Clean up. */ | |
1730 | free_reloc_deps_graph (deps); | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | ||
0c7a8e5a AM |
1735 | static void |
1736 | xtensa_colocate_output_literals (lang_statement_union_type *s) | |
e0001a05 NC |
1737 | { |
1738 | lang_for_each_statement_worker (xtensa_colocate_output_literals_callback, s); | |
1739 | } | |
1740 | ||
1741 | ||
0c7a8e5a AM |
1742 | static void |
1743 | xtensa_ldlang_clear_addresses (lang_statement_union_type *statement) | |
e0001a05 NC |
1744 | { |
1745 | switch (statement->header.type) | |
1746 | { | |
0c7a8e5a | 1747 | case lang_input_section_enum: |
e0001a05 NC |
1748 | { |
1749 | asection *bfd_section = statement->input_section.section; | |
1750 | bfd_section->output_offset = 0; | |
1751 | } | |
1752 | break; | |
1753 | default: | |
1754 | break; | |
1755 | } | |
1756 | } | |
1757 | ||
1758 | ||
0c7a8e5a AM |
1759 | static bfd_vma |
1760 | ld_assign_relative_paged_dot (bfd_vma dot, | |
1761 | lang_statement_union_type *s, | |
1762 | const reloc_deps_graph *deps ATTRIBUTE_UNUSED, | |
1763 | bfd_boolean lit_align) | |
e0001a05 NC |
1764 | { |
1765 | /* Walk through all of the input statements in this wild statement | |
1766 | assign dot to all of them. */ | |
0c7a8e5a | 1767 | |
e0001a05 NC |
1768 | xtensa_ld_iter_stack *stack = NULL; |
1769 | xtensa_ld_iter_stack **stack_p = &stack; | |
1770 | ||
1771 | bfd_boolean first_section = FALSE; | |
1772 | bfd_boolean in_literals = FALSE; | |
1773 | ||
1774 | for (iter_stack_create (stack_p, s); | |
1775 | !iter_stack_empty (stack_p); | |
0c7a8e5a | 1776 | iter_stack_next (stack_p)) |
e0001a05 NC |
1777 | { |
1778 | lang_statement_union_type *l = iter_stack_current (stack_p); | |
0c7a8e5a AM |
1779 | |
1780 | switch (l->header.type) | |
e0001a05 NC |
1781 | { |
1782 | case lang_input_section_enum: | |
1783 | { | |
1784 | asection *section = l->input_section.section; | |
1785 | size_t align_pow = section->alignment_power; | |
1786 | bfd_boolean do_xtensa_alignment = FALSE; | |
0c7a8e5a | 1787 | |
e0001a05 NC |
1788 | if (lit_align) |
1789 | { | |
1790 | bfd_boolean sec_is_target = section_is_target (deps, l); | |
1791 | bfd_boolean sec_is_source = section_is_source (deps, l); | |
1792 | ||
eea6121a | 1793 | if (section->size != 0 |
e0001a05 NC |
1794 | && (first_section |
1795 | || (in_literals && !sec_is_target) | |
1796 | || (!in_literals && sec_is_target))) | |
1797 | { | |
1798 | do_xtensa_alignment = TRUE; | |
1799 | } | |
1800 | first_section = FALSE; | |
eea6121a | 1801 | if (section->size != 0) |
e0001a05 NC |
1802 | in_literals = (sec_is_target && !sec_is_source); |
1803 | } | |
1804 | ||
1805 | if (do_xtensa_alignment && xtensa_page_power != 0) | |
1806 | dot += (1 << xtensa_page_power); | |
1807 | ||
1808 | dot = align_power (dot, align_pow); | |
1809 | section->output_offset = dot; | |
eea6121a | 1810 | dot += section->size; |
e0001a05 NC |
1811 | } |
1812 | break; | |
1813 | case lang_fill_statement_enum: | |
1814 | dot += l->fill_statement.size; | |
1815 | break; | |
1816 | case lang_padding_statement_enum: | |
1817 | dot += l->padding_statement.size; | |
1818 | break; | |
1819 | default: | |
1820 | break; | |
1821 | } | |
1822 | } | |
1823 | return dot; | |
1824 | } | |
1825 | ||
1826 | ||
0c7a8e5a AM |
1827 | static bfd_boolean |
1828 | ld_local_file_relocations_fit (lang_statement_union_type *statement, | |
1829 | const reloc_deps_graph *deps ATTRIBUTE_UNUSED) | |
e0001a05 NC |
1830 | { |
1831 | /* Walk over all of the dependencies that we identified and make | |
1832 | sure that IF the source and target are here (addr != 0): | |
1833 | 1) target addr < source addr | |
0c7a8e5a | 1834 | 2) (roundup(source + source_size, 4) - rounddown(target, 4)) |
e0001a05 NC |
1835 | < (256K - (1 << bad align)) |
1836 | Need a worst-case proof.... */ | |
0c7a8e5a | 1837 | |
e0001a05 NC |
1838 | xtensa_ld_iter_stack *stack = NULL; |
1839 | xtensa_ld_iter_stack **stack_p = &stack; | |
1840 | size_t max_align_power = 0; | |
1841 | size_t align_penalty = 256; | |
1842 | reloc_deps_e *e; | |
1843 | size_t i; | |
1844 | ||
1845 | /* Find the worst-case alignment requirement for this set of statements. */ | |
1846 | for (iter_stack_create (stack_p, statement); | |
1847 | !iter_stack_empty (stack_p); | |
0c7a8e5a | 1848 | iter_stack_next (stack_p)) |
e0001a05 NC |
1849 | { |
1850 | lang_statement_union_type *l = iter_stack_current (stack_p); | |
0c7a8e5a | 1851 | if (l->header.type == lang_input_section_enum) |
e0001a05 NC |
1852 | { |
1853 | lang_input_section_type *input = &l->input_section; | |
1854 | asection *section = input->section; | |
1855 | if (section->alignment_power > max_align_power) | |
1856 | max_align_power = section->alignment_power; | |
1857 | } | |
1858 | } | |
1859 | ||
1860 | /* Now check that everything fits. */ | |
1861 | for (i = 0; i < deps->count; i++) | |
1862 | { | |
1863 | asection *sec = deps->sections[i]; | |
0c7a8e5a | 1864 | const reloc_deps_section *deps_section = |
e0001a05 NC |
1865 | xtensa_get_section_deps (deps, sec); |
1866 | if (deps_section) | |
1867 | { | |
1868 | /* We choose to walk through the successors. */ | |
1869 | for (e = deps_section->succs; e != NULL; e = e->next) | |
1870 | { | |
0c7a8e5a | 1871 | if (e->src != e->tgt |
e0001a05 NC |
1872 | && e->src->output_section == e->tgt->output_section |
1873 | && e->src->output_offset != 0 | |
1874 | && e->tgt->output_offset != 0) | |
1875 | { | |
0c7a8e5a | 1876 | bfd_vma l32r_addr = |
eea6121a | 1877 | align_power (e->src->output_offset + e->src->size, 2); |
0c7a8e5a | 1878 | bfd_vma target_addr = e->tgt->output_offset & ~3; |
e0001a05 NC |
1879 | if (l32r_addr < target_addr) |
1880 | { | |
1881 | fprintf (stderr, "Warning: " | |
1882 | "l32r target section before l32r\n"); | |
1883 | return FALSE; | |
1884 | } | |
1885 | ||
0c7a8e5a | 1886 | if (l32r_addr - target_addr > 256 * 1024 - align_penalty) |
e0001a05 NC |
1887 | return FALSE; |
1888 | } | |
1889 | } | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | return TRUE; | |
1894 | } | |
1895 | ||
1896 | ||
0c7a8e5a AM |
1897 | static bfd_vma |
1898 | ld_xtensa_insert_page_offsets (bfd_vma dot, | |
1899 | lang_statement_union_type *s, | |
1900 | reloc_deps_graph *deps, | |
1901 | bfd_boolean lit_align) | |
e0001a05 NC |
1902 | { |
1903 | xtensa_ld_iter_stack *stack = NULL; | |
1904 | xtensa_ld_iter_stack **stack_p = &stack; | |
1905 | ||
1906 | bfd_boolean first_section = FALSE; | |
1907 | bfd_boolean in_literals = FALSE; | |
0c7a8e5a | 1908 | |
e0001a05 NC |
1909 | if (!lit_align) |
1910 | return FALSE; | |
1911 | ||
1912 | for (iter_stack_create (stack_p, s); | |
1913 | !iter_stack_empty (stack_p); | |
0c7a8e5a | 1914 | iter_stack_next (stack_p)) |
e0001a05 NC |
1915 | { |
1916 | lang_statement_union_type *l = iter_stack_current (stack_p); | |
1917 | ||
0c7a8e5a AM |
1918 | switch (l->header.type) |
1919 | { | |
e0001a05 NC |
1920 | case lang_input_section_enum: |
1921 | { | |
1922 | asection *section = l->input_section.section; | |
1923 | bfd_boolean do_xtensa_alignment = FALSE; | |
0c7a8e5a | 1924 | |
e0001a05 NC |
1925 | if (lit_align) |
1926 | { | |
eea6121a | 1927 | if (section->size != 0 |
e0001a05 NC |
1928 | && (first_section |
1929 | || (in_literals && !section_is_target (deps, l)) | |
1930 | || (!in_literals && section_is_target (deps, l)))) | |
1931 | { | |
1932 | do_xtensa_alignment = TRUE; | |
1933 | } | |
1934 | first_section = FALSE; | |
eea6121a | 1935 | if (section->size != 0) |
e0001a05 NC |
1936 | { |
1937 | in_literals = (section_is_target (deps, l) | |
1938 | && !section_is_source (deps, l)); | |
1939 | } | |
1940 | } | |
1941 | ||
1942 | if (do_xtensa_alignment && xtensa_page_power != 0) | |
1943 | { | |
1944 | /* Create an expression that increments the current address, | |
1945 | i.e., "dot", by (1 << xtensa_align_power). */ | |
1946 | etree_type *name_op = exp_nameop (NAME, "."); | |
1947 | etree_type *addend_op = exp_intop (1 << xtensa_page_power); | |
1948 | etree_type *add_op = exp_binop ('+', name_op, addend_op); | |
1949 | etree_type *assign_op = exp_assop ('=', ".", add_op); | |
1950 | ||
1951 | lang_assignment_statement_type *assign_stmt; | |
1952 | lang_statement_union_type *assign_union; | |
1953 | lang_statement_list_type tmplist; | |
1954 | lang_statement_list_type *old_stat_ptr = stat_ptr; | |
0c7a8e5a | 1955 | |
e0001a05 NC |
1956 | /* There is hidden state in "lang_add_assignment". It |
1957 | appends the new assignment statement to the stat_ptr | |
1958 | list. Thus, we swap it before and after the call. */ | |
1959 | ||
1960 | tmplist.head = NULL; | |
1961 | tmplist.tail = &tmplist.head; | |
1962 | ||
1963 | stat_ptr = &tmplist; | |
1964 | /* Warning: side effect; statement appended to stat_ptr. */ | |
1965 | assign_stmt = lang_add_assignment (assign_op); | |
1966 | assign_union = (lang_statement_union_type *) assign_stmt; | |
1967 | stat_ptr = old_stat_ptr; | |
1968 | ||
1969 | assign_union->header.next = l; | |
1970 | *(*stack_p)->iterloc.loc = assign_union; | |
1971 | iter_stack_next (stack_p); | |
0c7a8e5a AM |
1972 | } |
1973 | } | |
1974 | break; | |
1975 | default: | |
1976 | break; | |
1977 | } | |
e0001a05 NC |
1978 | } |
1979 | return dot; | |
1980 | } | |
1981 | ||
1982 | EOF | |
1983 | ||
43cd72b9 | 1984 | # Define some shell vars to insert bits of code into the standard ELF |
e0001a05 NC |
1985 | # parse_args and list_options functions. |
1986 | # | |
1987 | PARSE_AND_LIST_PROLOGUE=' | |
43cd72b9 BW |
1988 | #define OPTION_OPT_SIZEOPT (300) |
1989 | #define OPTION_NO_RELAX (OPTION_OPT_SIZEOPT + 1) | |
1990 | #define OPTION_LITERAL_MOVEMENT (OPTION_NO_RELAX + 1) | |
1991 | #define OPTION_NO_LITERAL_MOVEMENT (OPTION_LITERAL_MOVEMENT + 1) | |
1992 | extern int elf32xtensa_size_opt; | |
1993 | extern int elf32xtensa_no_literal_movement; | |
e0001a05 NC |
1994 | ' |
1995 | ||
1996 | PARSE_AND_LIST_LONGOPTS=' | |
43cd72b9 | 1997 | { "size-opt", no_argument, NULL, OPTION_OPT_SIZEOPT}, |
e0001a05 | 1998 | { "no-relax", no_argument, NULL, OPTION_NO_RELAX}, |
43cd72b9 BW |
1999 | { "literal-movement", no_argument, NULL, OPTION_LITERAL_MOVEMENT}, |
2000 | { "no-literal-movement", no_argument, NULL, OPTION_NO_LITERAL_MOVEMENT}, | |
e0001a05 NC |
2001 | ' |
2002 | ||
2003 | PARSE_AND_LIST_OPTIONS=' | |
442996ee AM |
2004 | fprintf (file, _("\ |
2005 | --size-opt When relaxing longcalls, prefer size\n\ | |
2006 | optimization over branch target alignment\n")); | |
2007 | fprintf (file, _("\ | |
2008 | --no-relax Do not relax branches or coalesce literals\n")); | |
e0001a05 NC |
2009 | ' |
2010 | ||
2011 | PARSE_AND_LIST_ARGS_CASES=' | |
43cd72b9 BW |
2012 | case OPTION_OPT_SIZEOPT: |
2013 | elf32xtensa_size_opt = 1; | |
2014 | break; | |
e0001a05 NC |
2015 | case OPTION_NO_RELAX: |
2016 | disable_relaxation = TRUE; | |
2017 | break; | |
43cd72b9 BW |
2018 | case OPTION_LITERAL_MOVEMENT: |
2019 | elf32xtensa_no_literal_movement = 0; | |
2020 | break; | |
2021 | case OPTION_NO_LITERAL_MOVEMENT: | |
2022 | elf32xtensa_no_literal_movement = 1; | |
2023 | break; | |
e0001a05 NC |
2024 | ' |
2025 | ||
2026 | # Replace some of the standard ELF functions with our own versions. | |
2027 | # | |
2028 | LDEMUL_BEFORE_PARSE=elf_xtensa_before_parse | |
43cd72b9 | 2029 | LDEMUL_AFTER_OPEN=elf_xtensa_after_open |
e0001a05 | 2030 | LDEMUL_CHOOSE_TARGET=elf_xtensa_choose_target |
e0001a05 | 2031 | LDEMUL_BEFORE_ALLOCATION=elf_xtensa_before_allocation |