| 1 | # This shell script emits a C file. -*- C -*- |
| 2 | # Copyright (C) 2003-2018 Free Software Foundation, Inc. |
| 3 | # |
| 4 | # This file is part of the GNU Binutils. |
| 5 | # |
| 6 | # This program is free software; you can redistribute it and/or modify |
| 7 | # it under the terms of the GNU General Public License as published by |
| 8 | # the Free Software Foundation; either version 3 of the License, or |
| 9 | # (at your option) any later version. |
| 10 | # |
| 11 | # This program is distributed in the hope that it will be useful, |
| 12 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | # GNU General Public License for more details. |
| 15 | # |
| 16 | # You should have received a copy of the GNU General Public License |
| 17 | # along with this program; if not, write to the Free Software |
| 18 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | # MA 02110-1301, USA. |
| 20 | # |
| 21 | |
| 22 | # This file is sourced from elf32.em, and defines extra xtensa-elf |
| 23 | # specific routines. |
| 24 | # |
| 25 | fragment <<EOF |
| 26 | |
| 27 | #include <xtensa-config.h> |
| 28 | #include "../bfd/elf-bfd.h" |
| 29 | #include "elf/xtensa.h" |
| 30 | #include "bfd.h" |
| 31 | |
| 32 | /* Provide default values for new configuration settings. */ |
| 33 | #ifndef XSHAL_ABI |
| 34 | #define XSHAL_ABI 0 |
| 35 | #endif |
| 36 | |
| 37 | static void xtensa_wild_group_interleave (lang_statement_union_type *); |
| 38 | static void xtensa_colocate_output_literals (lang_statement_union_type *); |
| 39 | static void xtensa_strip_inconsistent_linkonce_sections |
| 40 | (lang_statement_list_type *); |
| 41 | |
| 42 | |
| 43 | /* This number is irrelevant until we turn on use_literal_pages */ |
| 44 | static bfd_vma xtensa_page_power = 12; /* 4K pages. */ |
| 45 | |
| 46 | /* To force a page break between literals and text, change |
| 47 | xtensa_use_literal_pages to "TRUE". */ |
| 48 | static bfd_boolean xtensa_use_literal_pages = FALSE; |
| 49 | |
| 50 | #define EXTRA_VALIDATION 0 |
| 51 | |
| 52 | |
| 53 | static char * |
| 54 | elf_xtensa_choose_target (int argc ATTRIBUTE_UNUSED, |
| 55 | char **argv ATTRIBUTE_UNUSED) |
| 56 | { |
| 57 | if (XCHAL_HAVE_BE) |
| 58 | return "${BIG_OUTPUT_FORMAT}"; |
| 59 | else |
| 60 | return "${LITTLE_OUTPUT_FORMAT}"; |
| 61 | } |
| 62 | |
| 63 | |
| 64 | static void |
| 65 | elf_xtensa_before_parse (void) |
| 66 | { |
| 67 | /* Just call the default hook.... Tensilica's version of this function |
| 68 | does some other work that isn't relevant here. */ |
| 69 | gld${EMULATION_NAME}_before_parse (); |
| 70 | } |
| 71 | |
| 72 | |
| 73 | static void |
| 74 | remove_section (bfd *abfd, asection *os) |
| 75 | { |
| 76 | asection **spp; |
| 77 | for (spp = &abfd->sections; *spp; spp = &(*spp)->next) |
| 78 | if (*spp == os) |
| 79 | { |
| 80 | *spp = os->next; |
| 81 | os->owner->section_count--; |
| 82 | break; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | |
| 87 | static bfd_boolean |
| 88 | replace_insn_sec_with_prop_sec (bfd *abfd, |
| 89 | const char *insn_sec_name, |
| 90 | const char *prop_sec_name, |
| 91 | char **error_message) |
| 92 | { |
| 93 | asection *insn_sec; |
| 94 | asection *prop_sec; |
| 95 | bfd_byte *prop_contents = NULL; |
| 96 | bfd_byte *insn_contents = NULL; |
| 97 | unsigned entry_count; |
| 98 | unsigned entry; |
| 99 | Elf_Internal_Shdr *rel_hdr; |
| 100 | Elf_Internal_Rela *internal_relocs = NULL; |
| 101 | unsigned reloc_count; |
| 102 | |
| 103 | *error_message = ""; |
| 104 | insn_sec = bfd_get_section_by_name (abfd, insn_sec_name); |
| 105 | if (insn_sec == NULL) |
| 106 | return TRUE; |
| 107 | entry_count = insn_sec->size / 8; |
| 108 | |
| 109 | prop_sec = bfd_get_section_by_name (abfd, prop_sec_name); |
| 110 | if (prop_sec != NULL && insn_sec != NULL) |
| 111 | { |
| 112 | *error_message = _("file already has property tables"); |
| 113 | return FALSE; |
| 114 | } |
| 115 | |
| 116 | if (insn_sec->size != 0) |
| 117 | { |
| 118 | insn_contents = (bfd_byte *) xmalloc (insn_sec->size); |
| 119 | if (! bfd_get_section_contents (abfd, insn_sec, insn_contents, |
| 120 | (file_ptr) 0, insn_sec->size)) |
| 121 | { |
| 122 | *error_message = _("failed to read section contents"); |
| 123 | goto cleanup; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | /* Create a property table section for it. */ |
| 128 | prop_sec_name = strdup (prop_sec_name); |
| 129 | prop_sec = bfd_make_section_with_flags |
| 130 | (abfd, prop_sec_name, bfd_get_section_flags (abfd, insn_sec)); |
| 131 | if (prop_sec == NULL |
| 132 | || ! bfd_set_section_alignment (abfd, prop_sec, 2)) |
| 133 | { |
| 134 | *error_message = _("could not create new section"); |
| 135 | goto cleanup; |
| 136 | } |
| 137 | |
| 138 | prop_sec->size = entry_count * 12; |
| 139 | prop_contents = (bfd_byte *) bfd_zalloc (abfd, prop_sec->size); |
| 140 | elf_section_data (prop_sec)->this_hdr.contents = prop_contents; |
| 141 | |
| 142 | /* The entry size and size must be set to allow the linker to compute |
| 143 | the number of relocations since it does not use reloc_count. */ |
| 144 | rel_hdr = _bfd_elf_single_rel_hdr (prop_sec); |
| 145 | rel_hdr->sh_entsize = sizeof (Elf32_External_Rela); |
| 146 | rel_hdr->sh_size = _bfd_elf_single_rel_hdr (insn_sec)->sh_size; |
| 147 | |
| 148 | if (prop_contents == NULL && prop_sec->size != 0) |
| 149 | { |
| 150 | *error_message = _("could not allocate section contents"); |
| 151 | goto cleanup; |
| 152 | } |
| 153 | |
| 154 | /* Read the relocations. */ |
| 155 | reloc_count = insn_sec->reloc_count; |
| 156 | if (reloc_count != 0) |
| 157 | { |
| 158 | /* If there is already an internal_reloc, then save it so that the |
| 159 | read_relocs function freshly allocates a copy. */ |
| 160 | Elf_Internal_Rela *saved_relocs = elf_section_data (insn_sec)->relocs; |
| 161 | |
| 162 | elf_section_data (insn_sec)->relocs = NULL; |
| 163 | internal_relocs = |
| 164 | _bfd_elf_link_read_relocs (abfd, insn_sec, NULL, NULL, FALSE); |
| 165 | elf_section_data (insn_sec)->relocs = saved_relocs; |
| 166 | |
| 167 | if (internal_relocs == NULL) |
| 168 | { |
| 169 | *error_message = _("out of memory"); |
| 170 | goto cleanup; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | /* Create a relocation section for the property section. */ |
| 175 | if (internal_relocs != NULL) |
| 176 | { |
| 177 | elf_section_data (prop_sec)->relocs = internal_relocs; |
| 178 | prop_sec->reloc_count = reloc_count; |
| 179 | } |
| 180 | |
| 181 | /* Now copy each insn table entry to the prop table entry with |
| 182 | appropriate flags. */ |
| 183 | for (entry = 0; entry < entry_count; ++entry) |
| 184 | { |
| 185 | unsigned value; |
| 186 | unsigned flags = (XTENSA_PROP_INSN | XTENSA_PROP_NO_TRANSFORM |
| 187 | | XTENSA_PROP_INSN_NO_REORDER); |
| 188 | value = bfd_get_32 (abfd, insn_contents + entry * 8 + 0); |
| 189 | bfd_put_32 (abfd, value, prop_contents + entry * 12 + 0); |
| 190 | value = bfd_get_32 (abfd, insn_contents + entry * 8 + 4); |
| 191 | bfd_put_32 (abfd, value, prop_contents + entry * 12 + 4); |
| 192 | bfd_put_32 (abfd, flags, prop_contents + entry * 12 + 8); |
| 193 | } |
| 194 | |
| 195 | /* Now copy all of the relocations. Change offsets for the |
| 196 | instruction table section to offsets in the property table |
| 197 | section. */ |
| 198 | if (internal_relocs) |
| 199 | { |
| 200 | unsigned i; |
| 201 | |
| 202 | for (i = 0; i < reloc_count; i++) |
| 203 | { |
| 204 | Elf_Internal_Rela *rela; |
| 205 | unsigned r_offset; |
| 206 | |
| 207 | rela = &internal_relocs[i]; |
| 208 | |
| 209 | /* If this relocation is to the .xt.insn section, |
| 210 | change the section number and the offset. */ |
| 211 | r_offset = rela->r_offset; |
| 212 | r_offset += 4 * (r_offset / 8); |
| 213 | rela->r_offset = r_offset; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | remove_section (abfd, insn_sec); |
| 218 | |
| 219 | if (insn_contents) |
| 220 | free (insn_contents); |
| 221 | |
| 222 | return TRUE; |
| 223 | |
| 224 | cleanup: |
| 225 | if (prop_sec && prop_sec->owner) |
| 226 | remove_section (abfd, prop_sec); |
| 227 | if (insn_contents) |
| 228 | free (insn_contents); |
| 229 | if (internal_relocs) |
| 230 | free (internal_relocs); |
| 231 | |
| 232 | return FALSE; |
| 233 | } |
| 234 | |
| 235 | |
| 236 | #define PROP_SEC_BASE_NAME ".xt.prop" |
| 237 | #define INSN_SEC_BASE_NAME ".xt.insn" |
| 238 | #define LINKONCE_SEC_OLD_TEXT_BASE_NAME ".gnu.linkonce.x." |
| 239 | |
| 240 | |
| 241 | static void |
| 242 | replace_instruction_table_sections (bfd *abfd, asection *sec) |
| 243 | { |
| 244 | char *message = ""; |
| 245 | const char *insn_sec_name = NULL; |
| 246 | char *prop_sec_name = NULL; |
| 247 | char *owned_prop_sec_name = NULL; |
| 248 | const char *sec_name; |
| 249 | |
| 250 | sec_name = bfd_get_section_name (abfd, sec); |
| 251 | if (strcmp (sec_name, INSN_SEC_BASE_NAME) == 0) |
| 252 | { |
| 253 | insn_sec_name = INSN_SEC_BASE_NAME; |
| 254 | prop_sec_name = PROP_SEC_BASE_NAME; |
| 255 | } |
| 256 | else if (CONST_STRNEQ (sec_name, LINKONCE_SEC_OLD_TEXT_BASE_NAME)) |
| 257 | { |
| 258 | insn_sec_name = sec_name; |
| 259 | owned_prop_sec_name = (char *) xmalloc (strlen (sec_name) + 20); |
| 260 | prop_sec_name = owned_prop_sec_name; |
| 261 | strcpy (prop_sec_name, ".gnu.linkonce.prop.t."); |
| 262 | strcat (prop_sec_name, |
| 263 | sec_name + strlen (LINKONCE_SEC_OLD_TEXT_BASE_NAME)); |
| 264 | } |
| 265 | if (insn_sec_name != NULL) |
| 266 | { |
| 267 | if (! replace_insn_sec_with_prop_sec (abfd, insn_sec_name, prop_sec_name, |
| 268 | &message)) |
| 269 | { |
| 270 | einfo (_("%P: warning: failed to convert %s table in %pB (%s); subsequent disassembly may be incomplete\n"), |
| 271 | insn_sec_name, abfd, message); |
| 272 | } |
| 273 | } |
| 274 | if (owned_prop_sec_name) |
| 275 | free (owned_prop_sec_name); |
| 276 | } |
| 277 | |
| 278 | |
| 279 | /* This is called after all input sections have been opened to convert |
| 280 | instruction tables (.xt.insn, gnu.linkonce.x.*) tables into property |
| 281 | tables (.xt.prop) before any section placement. */ |
| 282 | |
| 283 | static void |
| 284 | elf_xtensa_after_open (void) |
| 285 | { |
| 286 | /* First call the ELF version. */ |
| 287 | gld${EMULATION_NAME}_after_open (); |
| 288 | |
| 289 | /* Now search the input files looking for instruction table sections. */ |
| 290 | LANG_FOR_EACH_INPUT_STATEMENT (f) |
| 291 | { |
| 292 | asection *sec = f->the_bfd->sections; |
| 293 | asection *next_sec; |
| 294 | |
| 295 | /* Do not use bfd_map_over_sections here since we are removing |
| 296 | sections as we iterate. */ |
| 297 | while (sec != NULL) |
| 298 | { |
| 299 | next_sec = sec->next; |
| 300 | replace_instruction_table_sections (f->the_bfd, sec); |
| 301 | sec = next_sec; |
| 302 | } |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | |
| 307 | static bfd_boolean |
| 308 | xt_config_info_unpack_and_check (char *data, |
| 309 | bfd_boolean *pmismatch, |
| 310 | char **pmsg) |
| 311 | { |
| 312 | char *d, *key; |
| 313 | unsigned num; |
| 314 | |
| 315 | *pmismatch = FALSE; |
| 316 | |
| 317 | d = data; |
| 318 | while (*d) |
| 319 | { |
| 320 | key = d; |
| 321 | d = strchr (d, '='); |
| 322 | if (! d) |
| 323 | goto error; |
| 324 | |
| 325 | /* Overwrite the equal sign. */ |
| 326 | *d++ = 0; |
| 327 | |
| 328 | /* Check if this is a quoted string or a number. */ |
| 329 | if (*d == '"') |
| 330 | { |
| 331 | /* No string values are currently checked by LD; |
| 332 | just skip over the quotes. */ |
| 333 | d++; |
| 334 | d = strchr (d, '"'); |
| 335 | if (! d) |
| 336 | goto error; |
| 337 | /* Overwrite the trailing quote. */ |
| 338 | *d++ = 0; |
| 339 | } |
| 340 | else |
| 341 | { |
| 342 | if (*d == 0) |
| 343 | goto error; |
| 344 | num = strtoul (d, &d, 0); |
| 345 | |
| 346 | if (! strcmp (key, "ABI")) |
| 347 | { |
| 348 | if (num != XSHAL_ABI) |
| 349 | { |
| 350 | *pmismatch = TRUE; |
| 351 | *pmsg = "ABI does not match"; |
| 352 | } |
| 353 | } |
| 354 | else if (! strcmp (key, "USE_ABSOLUTE_LITERALS")) |
| 355 | { |
| 356 | if (num != XSHAL_USE_ABSOLUTE_LITERALS) |
| 357 | { |
| 358 | *pmismatch = TRUE; |
| 359 | *pmsg = "incompatible use of the Extended L32R option"; |
| 360 | } |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | if (*d++ != '\n') |
| 365 | goto error; |
| 366 | } |
| 367 | |
| 368 | return TRUE; |
| 369 | |
| 370 | error: |
| 371 | return FALSE; |
| 372 | } |
| 373 | |
| 374 | |
| 375 | #define XTINFO_NAME "Xtensa_Info" |
| 376 | #define XTINFO_NAMESZ 12 |
| 377 | #define XTINFO_TYPE 1 |
| 378 | |
| 379 | static void |
| 380 | check_xtensa_info (bfd *abfd, asection *info_sec) |
| 381 | { |
| 382 | char *data, *errmsg = ""; |
| 383 | bfd_boolean mismatch; |
| 384 | |
| 385 | data = xmalloc (info_sec->size); |
| 386 | if (! bfd_get_section_contents (abfd, info_sec, data, 0, info_sec->size)) |
| 387 | einfo (_("%F%P: %pB: cannot read contents of section %pA\n"), abfd, info_sec); |
| 388 | |
| 389 | if (info_sec->size > 24 |
| 390 | && info_sec->size >= 24 + bfd_get_32 (abfd, data + 4) |
| 391 | && bfd_get_32 (abfd, data + 0) == XTINFO_NAMESZ |
| 392 | && bfd_get_32 (abfd, data + 8) == XTINFO_TYPE |
| 393 | && strcmp (data + 12, XTINFO_NAME) == 0 |
| 394 | && xt_config_info_unpack_and_check (data + 12 + XTINFO_NAMESZ, |
| 395 | &mismatch, &errmsg)) |
| 396 | { |
| 397 | if (mismatch) |
| 398 | einfo (_("%P: %pB: warning: incompatible Xtensa configuration (%s)\n"), |
| 399 | abfd, errmsg); |
| 400 | } |
| 401 | else |
| 402 | einfo (_("%P: %pB: warning: cannot parse .xtensa.info section\n"), abfd); |
| 403 | |
| 404 | free (data); |
| 405 | } |
| 406 | |
| 407 | |
| 408 | /* This is called after the sections have been attached to output |
| 409 | sections, but before any sizes or addresses have been set. */ |
| 410 | |
| 411 | static void |
| 412 | elf_xtensa_before_allocation (void) |
| 413 | { |
| 414 | asection *info_sec, *first_info_sec; |
| 415 | bfd *first_bfd; |
| 416 | bfd_boolean is_big_endian = XCHAL_HAVE_BE; |
| 417 | |
| 418 | /* Check that the output endianness matches the Xtensa |
| 419 | configuration. The BFD library always includes both big and |
| 420 | little endian target vectors for Xtensa, but it only supports the |
| 421 | detailed instruction encode/decode operations (such as are |
| 422 | required to process relocations) for the selected Xtensa |
| 423 | configuration. */ |
| 424 | |
| 425 | if (is_big_endian |
| 426 | && link_info.output_bfd->xvec->byteorder == BFD_ENDIAN_LITTLE) |
| 427 | { |
| 428 | einfo (_("%F%P: little endian output does not match " |
| 429 | "Xtensa configuration\n")); |
| 430 | } |
| 431 | if (!is_big_endian |
| 432 | && link_info.output_bfd->xvec->byteorder == BFD_ENDIAN_BIG) |
| 433 | { |
| 434 | einfo (_("%F%P: big endian output does not match " |
| 435 | "Xtensa configuration\n")); |
| 436 | } |
| 437 | |
| 438 | /* Keep track of the first input .xtensa.info section, and as a fallback, |
| 439 | the first input bfd where a .xtensa.info section could be created. |
| 440 | After the input .xtensa.info has been checked, the contents of the |
| 441 | first one will be replaced with the output .xtensa.info table. */ |
| 442 | first_info_sec = 0; |
| 443 | first_bfd = 0; |
| 444 | |
| 445 | LANG_FOR_EACH_INPUT_STATEMENT (f) |
| 446 | { |
| 447 | /* Check that the endianness for each input file matches the output. |
| 448 | The merge_private_bfd_data hook has already reported any mismatches |
| 449 | as errors, but those errors are not fatal. At this point, we |
| 450 | cannot go any further if there are any mismatches. */ |
| 451 | if ((is_big_endian && f->the_bfd->xvec->byteorder == BFD_ENDIAN_LITTLE) |
| 452 | || (!is_big_endian && f->the_bfd->xvec->byteorder == BFD_ENDIAN_BIG)) |
| 453 | einfo (_("%F%P: cross-endian linking for %pB not supported\n"), |
| 454 | f->the_bfd); |
| 455 | |
| 456 | if (! first_bfd) |
| 457 | first_bfd = f->the_bfd; |
| 458 | |
| 459 | info_sec = bfd_get_section_by_name (f->the_bfd, ".xtensa.info"); |
| 460 | if (! info_sec) |
| 461 | continue; |
| 462 | |
| 463 | if (! first_info_sec) |
| 464 | first_info_sec = info_sec; |
| 465 | |
| 466 | /* Unpack the .xtensa.info section and check it against the current |
| 467 | Xtensa configuration. */ |
| 468 | check_xtensa_info (f->the_bfd, info_sec); |
| 469 | |
| 470 | /* Do not include this copy of .xtensa.info in the output. */ |
| 471 | info_sec->size = 0; |
| 472 | info_sec->flags |= SEC_EXCLUDE; |
| 473 | } |
| 474 | |
| 475 | /* Reuse the first .xtensa.info input section to hold the output |
| 476 | .xtensa.info; or, if none were found, create a new section in the |
| 477 | first input bfd (assuming there is one). */ |
| 478 | info_sec = first_info_sec; |
| 479 | if (! info_sec && first_bfd) |
| 480 | { |
| 481 | info_sec = bfd_make_section_with_flags (first_bfd, ".xtensa.info", |
| 482 | SEC_HAS_CONTENTS | SEC_READONLY); |
| 483 | if (! info_sec) |
| 484 | einfo (_("%F%P: failed to create .xtensa.info section\n")); |
| 485 | } |
| 486 | if (info_sec) |
| 487 | { |
| 488 | int xtensa_info_size; |
| 489 | char *data; |
| 490 | |
| 491 | info_sec->flags &= ~SEC_EXCLUDE; |
| 492 | info_sec->flags |= SEC_IN_MEMORY; |
| 493 | |
| 494 | data = xmalloc (100); |
| 495 | sprintf (data, "USE_ABSOLUTE_LITERALS=%d\nABI=%d\n", |
| 496 | XSHAL_USE_ABSOLUTE_LITERALS, XSHAL_ABI); |
| 497 | xtensa_info_size = strlen (data) + 1; |
| 498 | |
| 499 | /* Add enough null terminators to pad to a word boundary. */ |
| 500 | do |
| 501 | data[xtensa_info_size++] = 0; |
| 502 | while ((xtensa_info_size & 3) != 0); |
| 503 | |
| 504 | info_sec->size = 12 + XTINFO_NAMESZ + xtensa_info_size; |
| 505 | info_sec->contents = xmalloc (info_sec->size); |
| 506 | bfd_put_32 (info_sec->owner, XTINFO_NAMESZ, info_sec->contents + 0); |
| 507 | bfd_put_32 (info_sec->owner, xtensa_info_size, info_sec->contents + 4); |
| 508 | bfd_put_32 (info_sec->owner, XTINFO_TYPE, info_sec->contents + 8); |
| 509 | memcpy (info_sec->contents + 12, XTINFO_NAME, XTINFO_NAMESZ); |
| 510 | memcpy (info_sec->contents + 12 + XTINFO_NAMESZ, data, xtensa_info_size); |
| 511 | free (data); |
| 512 | } |
| 513 | |
| 514 | /* Enable relaxation by default if the "--no-relax" option was not |
| 515 | specified. This is done here instead of in the before_parse hook |
| 516 | because there is a check in main() to prohibit use of --relax and |
| 517 | -r together and that combination should be allowed for Xtensa. */ |
| 518 | if (RELAXATION_DISABLED_BY_DEFAULT) |
| 519 | ENABLE_RELAXATION; |
| 520 | |
| 521 | xtensa_strip_inconsistent_linkonce_sections (stat_ptr); |
| 522 | |
| 523 | gld${EMULATION_NAME}_before_allocation (); |
| 524 | |
| 525 | xtensa_wild_group_interleave (stat_ptr->head); |
| 526 | |
| 527 | if (RELAXATION_ENABLED) |
| 528 | xtensa_colocate_output_literals (stat_ptr->head); |
| 529 | |
| 530 | /* TBD: We need to force the page alignments to here and only do |
| 531 | them as needed for the entire output section. Finally, if this |
| 532 | is a relocatable link then we need to add alignment notes so |
| 533 | that the literals can be separated later. */ |
| 534 | } |
| 535 | |
| 536 | |
| 537 | typedef struct wildcard_list section_name_list; |
| 538 | |
| 539 | typedef struct reloc_deps_e_t reloc_deps_e; |
| 540 | typedef struct reloc_deps_section_t reloc_deps_section; |
| 541 | typedef struct reloc_deps_graph_t reloc_deps_graph; |
| 542 | |
| 543 | |
| 544 | struct reloc_deps_e_t |
| 545 | { |
| 546 | asection *src; /* Contains l32rs. */ |
| 547 | asection *tgt; /* Contains literals. */ |
| 548 | reloc_deps_e *next; |
| 549 | }; |
| 550 | |
| 551 | /* Place these in the userdata field. */ |
| 552 | struct reloc_deps_section_t |
| 553 | { |
| 554 | reloc_deps_e *preds; |
| 555 | reloc_deps_e *succs; |
| 556 | bfd_boolean is_only_literal; |
| 557 | }; |
| 558 | |
| 559 | |
| 560 | struct reloc_deps_graph_t |
| 561 | { |
| 562 | size_t count; |
| 563 | size_t size; |
| 564 | asection **sections; |
| 565 | }; |
| 566 | |
| 567 | static void xtensa_layout_wild |
| 568 | (const reloc_deps_graph *, lang_wild_statement_type *); |
| 569 | |
| 570 | typedef void (*deps_callback_t) (asection *, /* src_sec */ |
| 571 | bfd_vma, /* src_offset */ |
| 572 | asection *, /* target_sec */ |
| 573 | bfd_vma, /* target_offset */ |
| 574 | void *); /* closure */ |
| 575 | |
| 576 | extern bfd_boolean xtensa_callback_required_dependence |
| 577 | (bfd *, asection *, struct bfd_link_info *, deps_callback_t, void *); |
| 578 | static void xtensa_ldlang_clear_addresses (lang_statement_union_type *); |
| 579 | static bfd_boolean ld_local_file_relocations_fit |
| 580 | (lang_statement_union_type *, const reloc_deps_graph *); |
| 581 | static bfd_vma ld_assign_relative_paged_dot |
| 582 | (bfd_vma, lang_statement_union_type *, const reloc_deps_graph *, |
| 583 | bfd_boolean); |
| 584 | static bfd_vma ld_xtensa_insert_page_offsets |
| 585 | (bfd_vma, lang_statement_union_type *, reloc_deps_graph *, bfd_boolean); |
| 586 | #if EXTRA_VALIDATION |
| 587 | static size_t ld_count_children (lang_statement_union_type *); |
| 588 | #endif |
| 589 | |
| 590 | extern lang_statement_list_type constructor_list; |
| 591 | |
| 592 | static reloc_deps_section * |
| 593 | xtensa_get_section_deps (const reloc_deps_graph *deps ATTRIBUTE_UNUSED, |
| 594 | asection *sec) |
| 595 | { |
| 596 | /* We have a separate function for this so that |
| 597 | we could in the future keep a completely independent |
| 598 | structure that maps a section to its dependence edges. |
| 599 | For now, we place these in the sec->userdata field. */ |
| 600 | reloc_deps_section *sec_deps = sec->userdata; |
| 601 | return sec_deps; |
| 602 | } |
| 603 | |
| 604 | static void |
| 605 | xtensa_set_section_deps (const reloc_deps_graph *deps ATTRIBUTE_UNUSED, |
| 606 | asection *sec, |
| 607 | reloc_deps_section *deps_section) |
| 608 | { |
| 609 | sec->userdata = deps_section; |
| 610 | } |
| 611 | |
| 612 | |
| 613 | /* This is used to keep a list of all of the sections participating in |
| 614 | the graph so we can clean them up quickly. */ |
| 615 | |
| 616 | static void |
| 617 | xtensa_append_section_deps (reloc_deps_graph *deps, asection *sec) |
| 618 | { |
| 619 | if (deps->size <= deps->count) |
| 620 | { |
| 621 | asection **new_sections; |
| 622 | size_t i; |
| 623 | size_t new_size; |
| 624 | |
| 625 | new_size = deps->size * 2; |
| 626 | if (new_size == 0) |
| 627 | new_size = 20; |
| 628 | |
| 629 | new_sections = xmalloc (sizeof (asection *) * new_size); |
| 630 | memset (new_sections, 0, sizeof (asection *) * new_size); |
| 631 | for (i = 0; i < deps->count; i++) |
| 632 | { |
| 633 | new_sections[i] = deps->sections[i]; |
| 634 | } |
| 635 | if (deps->sections != NULL) |
| 636 | free (deps->sections); |
| 637 | deps->sections = new_sections; |
| 638 | deps->size = new_size; |
| 639 | } |
| 640 | deps->sections[deps->count] = sec; |
| 641 | deps->count++; |
| 642 | } |
| 643 | |
| 644 | |
| 645 | static void |
| 646 | free_reloc_deps_graph (reloc_deps_graph *deps) |
| 647 | { |
| 648 | size_t i; |
| 649 | for (i = 0; i < deps->count; i++) |
| 650 | { |
| 651 | asection *sec = deps->sections[i]; |
| 652 | reloc_deps_section *sec_deps; |
| 653 | sec_deps = xtensa_get_section_deps (deps, sec); |
| 654 | if (sec_deps) |
| 655 | { |
| 656 | reloc_deps_e *next; |
| 657 | while (sec_deps->succs != NULL) |
| 658 | { |
| 659 | next = sec_deps->succs->next; |
| 660 | free (sec_deps->succs); |
| 661 | sec_deps->succs = next; |
| 662 | } |
| 663 | |
| 664 | while (sec_deps->preds != NULL) |
| 665 | { |
| 666 | next = sec_deps->preds->next; |
| 667 | free (sec_deps->preds); |
| 668 | sec_deps->preds = next; |
| 669 | } |
| 670 | free (sec_deps); |
| 671 | } |
| 672 | xtensa_set_section_deps (deps, sec, NULL); |
| 673 | } |
| 674 | if (deps->sections) |
| 675 | free (deps->sections); |
| 676 | |
| 677 | free (deps); |
| 678 | } |
| 679 | |
| 680 | |
| 681 | static bfd_boolean |
| 682 | section_is_source (const reloc_deps_graph *deps ATTRIBUTE_UNUSED, |
| 683 | lang_statement_union_type *s) |
| 684 | { |
| 685 | asection *sec; |
| 686 | const reloc_deps_section *sec_deps; |
| 687 | |
| 688 | if (s->header.type != lang_input_section_enum) |
| 689 | return FALSE; |
| 690 | sec = s->input_section.section; |
| 691 | |
| 692 | sec_deps = xtensa_get_section_deps (deps, sec); |
| 693 | return sec_deps && sec_deps->succs != NULL; |
| 694 | } |
| 695 | |
| 696 | |
| 697 | static bfd_boolean |
| 698 | section_is_target (const reloc_deps_graph *deps ATTRIBUTE_UNUSED, |
| 699 | lang_statement_union_type *s) |
| 700 | { |
| 701 | asection *sec; |
| 702 | const reloc_deps_section *sec_deps; |
| 703 | |
| 704 | if (s->header.type != lang_input_section_enum) |
| 705 | return FALSE; |
| 706 | sec = s->input_section.section; |
| 707 | |
| 708 | sec_deps = xtensa_get_section_deps (deps, sec); |
| 709 | return sec_deps && sec_deps->preds != NULL; |
| 710 | } |
| 711 | |
| 712 | |
| 713 | static bfd_boolean |
| 714 | section_is_source_or_target (const reloc_deps_graph *deps ATTRIBUTE_UNUSED, |
| 715 | lang_statement_union_type *s) |
| 716 | { |
| 717 | return (section_is_source (deps, s) |
| 718 | || section_is_target (deps, s)); |
| 719 | } |
| 720 | |
| 721 | |
| 722 | typedef struct xtensa_ld_iter_stack_t xtensa_ld_iter_stack; |
| 723 | typedef struct xtensa_ld_iter_t xtensa_ld_iter; |
| 724 | |
| 725 | struct xtensa_ld_iter_t |
| 726 | { |
| 727 | lang_statement_union_type *parent; /* Parent of the list. */ |
| 728 | lang_statement_list_type *l; /* List that holds it. */ |
| 729 | lang_statement_union_type **loc; /* Place in the list. */ |
| 730 | }; |
| 731 | |
| 732 | struct xtensa_ld_iter_stack_t |
| 733 | { |
| 734 | xtensa_ld_iter iterloc; /* List that hold it. */ |
| 735 | |
| 736 | xtensa_ld_iter_stack *next; /* Next in the stack. */ |
| 737 | xtensa_ld_iter_stack *prev; /* Back pointer for stack. */ |
| 738 | }; |
| 739 | |
| 740 | |
| 741 | static void |
| 742 | ld_xtensa_move_section_after (xtensa_ld_iter *to, xtensa_ld_iter *current) |
| 743 | { |
| 744 | lang_statement_union_type *to_next; |
| 745 | lang_statement_union_type *current_next; |
| 746 | lang_statement_union_type **e; |
| 747 | |
| 748 | #if EXTRA_VALIDATION |
| 749 | size_t old_to_count, new_to_count; |
| 750 | size_t old_current_count, new_current_count; |
| 751 | #endif |
| 752 | |
| 753 | if (to == current) |
| 754 | return; |
| 755 | |
| 756 | #if EXTRA_VALIDATION |
| 757 | old_to_count = ld_count_children (to->parent); |
| 758 | old_current_count = ld_count_children (current->parent); |
| 759 | #endif |
| 760 | |
| 761 | to_next = *(to->loc); |
| 762 | current_next = (*current->loc)->header.next; |
| 763 | |
| 764 | *(to->loc) = *(current->loc); |
| 765 | |
| 766 | *(current->loc) = current_next; |
| 767 | (*(to->loc))->header.next = to_next; |
| 768 | |
| 769 | /* reset "to" list tail */ |
| 770 | for (e = &to->l->head; *e != NULL; e = &(*e)->header.next) |
| 771 | ; |
| 772 | to->l->tail = e; |
| 773 | |
| 774 | /* reset "current" list tail */ |
| 775 | for (e = ¤t->l->head; *e != NULL; e = &(*e)->header.next) |
| 776 | ; |
| 777 | current->l->tail = e; |
| 778 | |
| 779 | #if EXTRA_VALIDATION |
| 780 | new_to_count = ld_count_children (to->parent); |
| 781 | new_current_count = ld_count_children (current->parent); |
| 782 | |
| 783 | ASSERT ((old_to_count + old_current_count) |
| 784 | == (new_to_count + new_current_count)); |
| 785 | #endif |
| 786 | } |
| 787 | |
| 788 | |
| 789 | /* Can only be called with lang_statements that have lists. Returns |
| 790 | FALSE if the list is empty. */ |
| 791 | |
| 792 | static bfd_boolean |
| 793 | iter_stack_empty (xtensa_ld_iter_stack **stack_p) |
| 794 | { |
| 795 | return *stack_p == NULL; |
| 796 | } |
| 797 | |
| 798 | |
| 799 | static bfd_boolean |
| 800 | iter_stack_push (xtensa_ld_iter_stack **stack_p, |
| 801 | lang_statement_union_type *parent) |
| 802 | { |
| 803 | xtensa_ld_iter_stack *stack; |
| 804 | lang_statement_list_type *l = NULL; |
| 805 | |
| 806 | switch (parent->header.type) |
| 807 | { |
| 808 | case lang_output_section_statement_enum: |
| 809 | l = &parent->output_section_statement.children; |
| 810 | break; |
| 811 | case lang_wild_statement_enum: |
| 812 | l = &parent->wild_statement.children; |
| 813 | break; |
| 814 | case lang_group_statement_enum: |
| 815 | l = &parent->group_statement.children; |
| 816 | break; |
| 817 | default: |
| 818 | ASSERT (0); |
| 819 | return FALSE; |
| 820 | } |
| 821 | |
| 822 | /* Empty. do not push. */ |
| 823 | if (l->tail == &l->head) |
| 824 | return FALSE; |
| 825 | |
| 826 | stack = xmalloc (sizeof (xtensa_ld_iter_stack)); |
| 827 | memset (stack, 0, sizeof (xtensa_ld_iter_stack)); |
| 828 | stack->iterloc.parent = parent; |
| 829 | stack->iterloc.l = l; |
| 830 | stack->iterloc.loc = &l->head; |
| 831 | |
| 832 | stack->next = *stack_p; |
| 833 | stack->prev = NULL; |
| 834 | if (*stack_p != NULL) |
| 835 | (*stack_p)->prev = stack; |
| 836 | *stack_p = stack; |
| 837 | return TRUE; |
| 838 | } |
| 839 | |
| 840 | |
| 841 | static void |
| 842 | iter_stack_pop (xtensa_ld_iter_stack **stack_p) |
| 843 | { |
| 844 | xtensa_ld_iter_stack *stack; |
| 845 | |
| 846 | stack = *stack_p; |
| 847 | |
| 848 | if (stack == NULL) |
| 849 | { |
| 850 | ASSERT (stack != NULL); |
| 851 | return; |
| 852 | } |
| 853 | |
| 854 | if (stack->next != NULL) |
| 855 | stack->next->prev = NULL; |
| 856 | |
| 857 | *stack_p = stack->next; |
| 858 | free (stack); |
| 859 | } |
| 860 | |
| 861 | |
| 862 | /* This MUST be called if, during iteration, the user changes the |
| 863 | underlying structure. It will check for a NULL current and advance |
| 864 | accordingly. */ |
| 865 | |
| 866 | static void |
| 867 | iter_stack_update (xtensa_ld_iter_stack **stack_p) |
| 868 | { |
| 869 | if (!iter_stack_empty (stack_p) |
| 870 | && (*(*stack_p)->iterloc.loc) == NULL) |
| 871 | { |
| 872 | iter_stack_pop (stack_p); |
| 873 | |
| 874 | while (!iter_stack_empty (stack_p) |
| 875 | && ((*(*stack_p)->iterloc.loc)->header.next == NULL)) |
| 876 | { |
| 877 | iter_stack_pop (stack_p); |
| 878 | } |
| 879 | if (!iter_stack_empty (stack_p)) |
| 880 | (*stack_p)->iterloc.loc = &(*(*stack_p)->iterloc.loc)->header.next; |
| 881 | } |
| 882 | } |
| 883 | |
| 884 | |
| 885 | static void |
| 886 | iter_stack_next (xtensa_ld_iter_stack **stack_p) |
| 887 | { |
| 888 | xtensa_ld_iter_stack *stack; |
| 889 | lang_statement_union_type *current; |
| 890 | stack = *stack_p; |
| 891 | |
| 892 | current = *stack->iterloc.loc; |
| 893 | /* If we are on the first element. */ |
| 894 | if (current != NULL) |
| 895 | { |
| 896 | switch (current->header.type) |
| 897 | { |
| 898 | case lang_output_section_statement_enum: |
| 899 | case lang_wild_statement_enum: |
| 900 | case lang_group_statement_enum: |
| 901 | /* If the list if not empty, we are done. */ |
| 902 | if (iter_stack_push (stack_p, *stack->iterloc.loc)) |
| 903 | return; |
| 904 | /* Otherwise increment the pointer as normal. */ |
| 905 | break; |
| 906 | default: |
| 907 | break; |
| 908 | } |
| 909 | } |
| 910 | |
| 911 | while (!iter_stack_empty (stack_p) |
| 912 | && ((*(*stack_p)->iterloc.loc)->header.next == NULL)) |
| 913 | { |
| 914 | iter_stack_pop (stack_p); |
| 915 | } |
| 916 | if (!iter_stack_empty (stack_p)) |
| 917 | (*stack_p)->iterloc.loc = &(*(*stack_p)->iterloc.loc)->header.next; |
| 918 | } |
| 919 | |
| 920 | |
| 921 | static lang_statement_union_type * |
| 922 | iter_stack_current (xtensa_ld_iter_stack **stack_p) |
| 923 | { |
| 924 | return *((*stack_p)->iterloc.loc); |
| 925 | } |
| 926 | |
| 927 | |
| 928 | /* The iter stack is a preorder. */ |
| 929 | |
| 930 | static void |
| 931 | iter_stack_create (xtensa_ld_iter_stack **stack_p, |
| 932 | lang_statement_union_type *parent) |
| 933 | { |
| 934 | iter_stack_push (stack_p, parent); |
| 935 | } |
| 936 | |
| 937 | |
| 938 | static void |
| 939 | iter_stack_copy_current (xtensa_ld_iter_stack **stack_p, xtensa_ld_iter *front) |
| 940 | { |
| 941 | *front = (*stack_p)->iterloc; |
| 942 | } |
| 943 | |
| 944 | |
| 945 | static void |
| 946 | xtensa_colocate_literals (reloc_deps_graph *deps, |
| 947 | lang_statement_union_type *statement) |
| 948 | { |
| 949 | /* Keep a stack of pointers to control iteration through the contours. */ |
| 950 | xtensa_ld_iter_stack *stack = NULL; |
| 951 | xtensa_ld_iter_stack **stack_p = &stack; |
| 952 | |
| 953 | xtensa_ld_iter front; /* Location where new insertion should occur. */ |
| 954 | xtensa_ld_iter *front_p = NULL; |
| 955 | |
| 956 | xtensa_ld_iter current; /* Location we are checking. */ |
| 957 | xtensa_ld_iter *current_p = NULL; |
| 958 | bfd_boolean in_literals = FALSE; |
| 959 | |
| 960 | if (deps->count == 0) |
| 961 | return; |
| 962 | |
| 963 | iter_stack_create (stack_p, statement); |
| 964 | |
| 965 | while (!iter_stack_empty (stack_p)) |
| 966 | { |
| 967 | bfd_boolean skip_increment = FALSE; |
| 968 | lang_statement_union_type *l = iter_stack_current (stack_p); |
| 969 | |
| 970 | switch (l->header.type) |
| 971 | { |
| 972 | case lang_assignment_statement_enum: |
| 973 | /* Any assignment statement should block reordering across it. */ |
| 974 | front_p = NULL; |
| 975 | in_literals = FALSE; |
| 976 | break; |
| 977 | |
| 978 | case lang_input_section_enum: |
| 979 | if (front_p == NULL) |
| 980 | { |
| 981 | in_literals = (section_is_target (deps, l) |
| 982 | && !section_is_source (deps, l)); |
| 983 | if (in_literals) |
| 984 | { |
| 985 | front_p = &front; |
| 986 | iter_stack_copy_current (stack_p, front_p); |
| 987 | } |
| 988 | } |
| 989 | else |
| 990 | { |
| 991 | bfd_boolean is_target; |
| 992 | current_p = ¤t; |
| 993 | iter_stack_copy_current (stack_p, current_p); |
| 994 | is_target = (section_is_target (deps, l) |
| 995 | && !section_is_source (deps, l)); |
| 996 | |
| 997 | if (in_literals) |
| 998 | { |
| 999 | iter_stack_copy_current (stack_p, front_p); |
| 1000 | if (!is_target) |
| 1001 | in_literals = FALSE; |
| 1002 | } |
| 1003 | else |
| 1004 | { |
| 1005 | if (is_target) |
| 1006 | { |
| 1007 | /* Try to insert in place. */ |
| 1008 | ld_xtensa_move_section_after (front_p, current_p); |
| 1009 | ld_assign_relative_paged_dot (0x100000, |
| 1010 | statement, |
| 1011 | deps, |
| 1012 | xtensa_use_literal_pages); |
| 1013 | |
| 1014 | /* We use this code because it's already written. */ |
| 1015 | if (!ld_local_file_relocations_fit (statement, deps)) |
| 1016 | { |
| 1017 | /* Move it back. */ |
| 1018 | ld_xtensa_move_section_after (current_p, front_p); |
| 1019 | /* Reset the literal placement. */ |
| 1020 | iter_stack_copy_current (stack_p, front_p); |
| 1021 | } |
| 1022 | else |
| 1023 | { |
| 1024 | /* Move front pointer up by one. */ |
| 1025 | front_p->loc = &(*front_p->loc)->header.next; |
| 1026 | |
| 1027 | /* Do not increment the current pointer. */ |
| 1028 | skip_increment = TRUE; |
| 1029 | } |
| 1030 | } |
| 1031 | } |
| 1032 | } |
| 1033 | break; |
| 1034 | default: |
| 1035 | break; |
| 1036 | } |
| 1037 | |
| 1038 | if (!skip_increment) |
| 1039 | iter_stack_next (stack_p); |
| 1040 | else |
| 1041 | /* Be careful to update the stack_p if it now is a null. */ |
| 1042 | iter_stack_update (stack_p); |
| 1043 | } |
| 1044 | |
| 1045 | lang_for_each_statement_worker (xtensa_ldlang_clear_addresses, statement); |
| 1046 | } |
| 1047 | |
| 1048 | |
| 1049 | static void |
| 1050 | xtensa_move_dependencies_to_front (reloc_deps_graph *deps, |
| 1051 | lang_wild_statement_type *w) |
| 1052 | { |
| 1053 | /* Keep a front pointer and a current pointer. */ |
| 1054 | lang_statement_union_type **front; |
| 1055 | lang_statement_union_type **current; |
| 1056 | |
| 1057 | /* Walk to the end of the targets. */ |
| 1058 | for (front = &w->children.head; |
| 1059 | (*front != NULL) && section_is_source_or_target (deps, *front); |
| 1060 | front = &(*front)->header.next) |
| 1061 | ; |
| 1062 | |
| 1063 | if (*front == NULL) |
| 1064 | return; |
| 1065 | |
| 1066 | current = &(*front)->header.next; |
| 1067 | while (*current != NULL) |
| 1068 | { |
| 1069 | if (section_is_source_or_target (deps, *current)) |
| 1070 | { |
| 1071 | /* Insert in place. */ |
| 1072 | xtensa_ld_iter front_iter; |
| 1073 | xtensa_ld_iter current_iter; |
| 1074 | |
| 1075 | front_iter.parent = (lang_statement_union_type *) w; |
| 1076 | front_iter.l = &w->children; |
| 1077 | front_iter.loc = front; |
| 1078 | |
| 1079 | current_iter.parent = (lang_statement_union_type *) w; |
| 1080 | current_iter.l = &w->children; |
| 1081 | current_iter.loc = current; |
| 1082 | |
| 1083 | ld_xtensa_move_section_after (&front_iter, ¤t_iter); |
| 1084 | front = &(*front)->header.next; |
| 1085 | } |
| 1086 | else |
| 1087 | { |
| 1088 | current = &(*current)->header.next; |
| 1089 | } |
| 1090 | } |
| 1091 | } |
| 1092 | |
| 1093 | |
| 1094 | static bfd_boolean |
| 1095 | deps_has_sec_edge (const reloc_deps_graph *deps, asection *src, asection *tgt) |
| 1096 | { |
| 1097 | const reloc_deps_section *sec_deps; |
| 1098 | const reloc_deps_e *sec_deps_e; |
| 1099 | |
| 1100 | sec_deps = xtensa_get_section_deps (deps, src); |
| 1101 | if (sec_deps == NULL) |
| 1102 | return FALSE; |
| 1103 | |
| 1104 | for (sec_deps_e = sec_deps->succs; |
| 1105 | sec_deps_e != NULL; |
| 1106 | sec_deps_e = sec_deps_e->next) |
| 1107 | { |
| 1108 | ASSERT (sec_deps_e->src == src); |
| 1109 | if (sec_deps_e->tgt == tgt) |
| 1110 | return TRUE; |
| 1111 | } |
| 1112 | return FALSE; |
| 1113 | } |
| 1114 | |
| 1115 | |
| 1116 | static bfd_boolean |
| 1117 | deps_has_edge (const reloc_deps_graph *deps, |
| 1118 | lang_statement_union_type *src, |
| 1119 | lang_statement_union_type *tgt) |
| 1120 | { |
| 1121 | if (!section_is_source (deps, src)) |
| 1122 | return FALSE; |
| 1123 | if (!section_is_target (deps, tgt)) |
| 1124 | return FALSE; |
| 1125 | |
| 1126 | if (src->header.type != lang_input_section_enum) |
| 1127 | return FALSE; |
| 1128 | if (tgt->header.type != lang_input_section_enum) |
| 1129 | return FALSE; |
| 1130 | |
| 1131 | return deps_has_sec_edge (deps, src->input_section.section, |
| 1132 | tgt->input_section.section); |
| 1133 | } |
| 1134 | |
| 1135 | |
| 1136 | static void |
| 1137 | add_deps_edge (reloc_deps_graph *deps, asection *src_sec, asection *tgt_sec) |
| 1138 | { |
| 1139 | reloc_deps_section *src_sec_deps; |
| 1140 | reloc_deps_section *tgt_sec_deps; |
| 1141 | |
| 1142 | reloc_deps_e *src_edge; |
| 1143 | reloc_deps_e *tgt_edge; |
| 1144 | |
| 1145 | if (deps_has_sec_edge (deps, src_sec, tgt_sec)) |
| 1146 | return; |
| 1147 | |
| 1148 | src_sec_deps = xtensa_get_section_deps (deps, src_sec); |
| 1149 | if (src_sec_deps == NULL) |
| 1150 | { |
| 1151 | /* Add a section. */ |
| 1152 | src_sec_deps = xmalloc (sizeof (reloc_deps_section)); |
| 1153 | memset (src_sec_deps, 0, sizeof (reloc_deps_section)); |
| 1154 | src_sec_deps->is_only_literal = 0; |
| 1155 | src_sec_deps->preds = NULL; |
| 1156 | src_sec_deps->succs = NULL; |
| 1157 | xtensa_set_section_deps (deps, src_sec, src_sec_deps); |
| 1158 | xtensa_append_section_deps (deps, src_sec); |
| 1159 | } |
| 1160 | |
| 1161 | tgt_sec_deps = xtensa_get_section_deps (deps, tgt_sec); |
| 1162 | if (tgt_sec_deps == NULL) |
| 1163 | { |
| 1164 | /* Add a section. */ |
| 1165 | tgt_sec_deps = xmalloc (sizeof (reloc_deps_section)); |
| 1166 | memset (tgt_sec_deps, 0, sizeof (reloc_deps_section)); |
| 1167 | tgt_sec_deps->is_only_literal = 0; |
| 1168 | tgt_sec_deps->preds = NULL; |
| 1169 | tgt_sec_deps->succs = NULL; |
| 1170 | xtensa_set_section_deps (deps, tgt_sec, tgt_sec_deps); |
| 1171 | xtensa_append_section_deps (deps, tgt_sec); |
| 1172 | } |
| 1173 | |
| 1174 | /* Add the edges. */ |
| 1175 | src_edge = xmalloc (sizeof (reloc_deps_e)); |
| 1176 | memset (src_edge, 0, sizeof (reloc_deps_e)); |
| 1177 | src_edge->src = src_sec; |
| 1178 | src_edge->tgt = tgt_sec; |
| 1179 | src_edge->next = src_sec_deps->succs; |
| 1180 | src_sec_deps->succs = src_edge; |
| 1181 | |
| 1182 | tgt_edge = xmalloc (sizeof (reloc_deps_e)); |
| 1183 | memset (tgt_edge, 0, sizeof (reloc_deps_e)); |
| 1184 | tgt_edge->src = src_sec; |
| 1185 | tgt_edge->tgt = tgt_sec; |
| 1186 | tgt_edge->next = tgt_sec_deps->preds; |
| 1187 | tgt_sec_deps->preds = tgt_edge; |
| 1188 | } |
| 1189 | |
| 1190 | |
| 1191 | static void |
| 1192 | build_deps_graph_callback (asection *src_sec, |
| 1193 | bfd_vma src_offset ATTRIBUTE_UNUSED, |
| 1194 | asection *target_sec, |
| 1195 | bfd_vma target_offset ATTRIBUTE_UNUSED, |
| 1196 | void *closure) |
| 1197 | { |
| 1198 | reloc_deps_graph *deps = closure; |
| 1199 | |
| 1200 | /* If the target is defined. */ |
| 1201 | if (target_sec != NULL) |
| 1202 | add_deps_edge (deps, src_sec, target_sec); |
| 1203 | } |
| 1204 | |
| 1205 | |
| 1206 | static reloc_deps_graph * |
| 1207 | ld_build_required_section_dependence (lang_statement_union_type *s) |
| 1208 | { |
| 1209 | reloc_deps_graph *deps; |
| 1210 | xtensa_ld_iter_stack *stack = NULL; |
| 1211 | |
| 1212 | deps = xmalloc (sizeof (reloc_deps_graph)); |
| 1213 | deps->sections = NULL; |
| 1214 | deps->count = 0; |
| 1215 | deps->size = 0; |
| 1216 | |
| 1217 | for (iter_stack_create (&stack, s); |
| 1218 | !iter_stack_empty (&stack); |
| 1219 | iter_stack_next (&stack)) |
| 1220 | { |
| 1221 | lang_statement_union_type *l = iter_stack_current (&stack); |
| 1222 | |
| 1223 | if (l->header.type == lang_input_section_enum) |
| 1224 | { |
| 1225 | lang_input_section_type *input; |
| 1226 | input = &l->input_section; |
| 1227 | xtensa_callback_required_dependence (input->section->owner, |
| 1228 | input->section, |
| 1229 | &link_info, |
| 1230 | /* Use the same closure. */ |
| 1231 | build_deps_graph_callback, |
| 1232 | deps); |
| 1233 | } |
| 1234 | } |
| 1235 | return deps; |
| 1236 | } |
| 1237 | |
| 1238 | |
| 1239 | #if EXTRA_VALIDATION |
| 1240 | static size_t |
| 1241 | ld_count_children (lang_statement_union_type *s) |
| 1242 | { |
| 1243 | size_t count = 0; |
| 1244 | xtensa_ld_iter_stack *stack = NULL; |
| 1245 | for (iter_stack_create (&stack, s); |
| 1246 | !iter_stack_empty (&stack); |
| 1247 | iter_stack_next (&stack)) |
| 1248 | { |
| 1249 | lang_statement_union_type *l = iter_stack_current (&stack); |
| 1250 | ASSERT (l != NULL); |
| 1251 | count++; |
| 1252 | } |
| 1253 | return count; |
| 1254 | } |
| 1255 | #endif /* EXTRA_VALIDATION */ |
| 1256 | |
| 1257 | |
| 1258 | /* Check if a particular section is included in the link. This will only |
| 1259 | be true for one instance of a particular linkonce section. */ |
| 1260 | |
| 1261 | static bfd_boolean input_section_found = FALSE; |
| 1262 | static asection *input_section_target = NULL; |
| 1263 | |
| 1264 | static void |
| 1265 | input_section_linked_worker (lang_statement_union_type *statement) |
| 1266 | { |
| 1267 | if ((statement->header.type == lang_input_section_enum |
| 1268 | && (statement->input_section.section == input_section_target))) |
| 1269 | input_section_found = TRUE; |
| 1270 | } |
| 1271 | |
| 1272 | static bfd_boolean |
| 1273 | input_section_linked (asection *sec) |
| 1274 | { |
| 1275 | input_section_found = FALSE; |
| 1276 | input_section_target = sec; |
| 1277 | lang_for_each_statement_worker (input_section_linked_worker, stat_ptr->head); |
| 1278 | return input_section_found; |
| 1279 | } |
| 1280 | |
| 1281 | |
| 1282 | /* Strip out any linkonce property tables or XCC exception tables where the |
| 1283 | associated linkonce text is from a different object file. Normally, |
| 1284 | a matching set of linkonce sections is taken from the same object file, |
| 1285 | but sometimes the files are compiled differently so that some of the |
| 1286 | linkonce sections are not present in all files. Stripping the |
| 1287 | inconsistent sections like this is not completely robust -- a much |
| 1288 | better solution is to use comdat groups. */ |
| 1289 | |
| 1290 | static int linkonce_len = sizeof (".gnu.linkonce.") - 1; |
| 1291 | |
| 1292 | static bfd_boolean |
| 1293 | is_inconsistent_linkonce_section (asection *sec) |
| 1294 | { |
| 1295 | bfd *abfd = sec->owner; |
| 1296 | const char *sec_name = bfd_get_section_name (abfd, sec); |
| 1297 | const char *name; |
| 1298 | |
| 1299 | if ((bfd_get_section_flags (abfd, sec) & SEC_LINK_ONCE) == 0 |
| 1300 | || strncmp (sec_name, ".gnu.linkonce.", linkonce_len) != 0) |
| 1301 | return FALSE; |
| 1302 | |
| 1303 | /* Check if this is an Xtensa property section or an exception table |
| 1304 | for Tensilica's XCC compiler. */ |
| 1305 | name = sec_name + linkonce_len; |
| 1306 | if (CONST_STRNEQ (name, "prop.")) |
| 1307 | name = strchr (name + 5, '.') ? strchr (name + 5, '.') + 1 : name + 5; |
| 1308 | else if (name[1] == '.' |
| 1309 | && (name[0] == 'p' || name[0] == 'e' || name[0] == 'h')) |
| 1310 | name += 2; |
| 1311 | else |
| 1312 | name = 0; |
| 1313 | |
| 1314 | if (name) |
| 1315 | { |
| 1316 | char *dep_sec_name = xmalloc (strlen (sec_name) + 1); |
| 1317 | asection *dep_sec; |
| 1318 | |
| 1319 | /* Get the associated linkonce text section and check if it is |
| 1320 | included in the link. If not, this section is inconsistent |
| 1321 | and should be stripped. */ |
| 1322 | strcpy (dep_sec_name, ".gnu.linkonce.t."); |
| 1323 | strcat (dep_sec_name, name); |
| 1324 | dep_sec = bfd_get_section_by_name (abfd, dep_sec_name); |
| 1325 | if (dep_sec == NULL || ! input_section_linked (dep_sec)) |
| 1326 | { |
| 1327 | free (dep_sec_name); |
| 1328 | return TRUE; |
| 1329 | } |
| 1330 | free (dep_sec_name); |
| 1331 | } |
| 1332 | |
| 1333 | return FALSE; |
| 1334 | } |
| 1335 | |
| 1336 | |
| 1337 | static void |
| 1338 | xtensa_strip_inconsistent_linkonce_sections (lang_statement_list_type *slist) |
| 1339 | { |
| 1340 | lang_statement_union_type **s_p = &slist->head; |
| 1341 | while (*s_p) |
| 1342 | { |
| 1343 | lang_statement_union_type *s = *s_p; |
| 1344 | lang_statement_union_type *s_next = (*s_p)->header.next; |
| 1345 | |
| 1346 | switch (s->header.type) |
| 1347 | { |
| 1348 | case lang_input_section_enum: |
| 1349 | if (is_inconsistent_linkonce_section (s->input_section.section)) |
| 1350 | { |
| 1351 | s->input_section.section->output_section = bfd_abs_section_ptr; |
| 1352 | *s_p = s_next; |
| 1353 | continue; |
| 1354 | } |
| 1355 | break; |
| 1356 | |
| 1357 | case lang_constructors_statement_enum: |
| 1358 | xtensa_strip_inconsistent_linkonce_sections (&constructor_list); |
| 1359 | break; |
| 1360 | |
| 1361 | case lang_output_section_statement_enum: |
| 1362 | if (s->output_section_statement.children.head) |
| 1363 | xtensa_strip_inconsistent_linkonce_sections |
| 1364 | (&s->output_section_statement.children); |
| 1365 | break; |
| 1366 | |
| 1367 | case lang_wild_statement_enum: |
| 1368 | xtensa_strip_inconsistent_linkonce_sections |
| 1369 | (&s->wild_statement.children); |
| 1370 | break; |
| 1371 | |
| 1372 | case lang_group_statement_enum: |
| 1373 | xtensa_strip_inconsistent_linkonce_sections |
| 1374 | (&s->group_statement.children); |
| 1375 | break; |
| 1376 | |
| 1377 | case lang_data_statement_enum: |
| 1378 | case lang_reloc_statement_enum: |
| 1379 | case lang_object_symbols_statement_enum: |
| 1380 | case lang_output_statement_enum: |
| 1381 | case lang_target_statement_enum: |
| 1382 | case lang_input_statement_enum: |
| 1383 | case lang_assignment_statement_enum: |
| 1384 | case lang_padding_statement_enum: |
| 1385 | case lang_address_statement_enum: |
| 1386 | case lang_fill_statement_enum: |
| 1387 | break; |
| 1388 | |
| 1389 | default: |
| 1390 | FAIL (); |
| 1391 | break; |
| 1392 | } |
| 1393 | |
| 1394 | s_p = &(*s_p)->header.next; |
| 1395 | } |
| 1396 | |
| 1397 | /* Reset the tail of the list, in case the last entry was removed. */ |
| 1398 | if (s_p != slist->tail) |
| 1399 | slist->tail = s_p; |
| 1400 | } |
| 1401 | |
| 1402 | |
| 1403 | static void |
| 1404 | xtensa_wild_group_interleave_callback (lang_statement_union_type *statement) |
| 1405 | { |
| 1406 | lang_wild_statement_type *w; |
| 1407 | reloc_deps_graph *deps; |
| 1408 | if (statement->header.type == lang_wild_statement_enum) |
| 1409 | { |
| 1410 | #if EXTRA_VALIDATION |
| 1411 | size_t old_child_count; |
| 1412 | size_t new_child_count; |
| 1413 | #endif |
| 1414 | bfd_boolean no_reorder; |
| 1415 | |
| 1416 | w = &statement->wild_statement; |
| 1417 | |
| 1418 | no_reorder = FALSE; |
| 1419 | |
| 1420 | /* If it has 0 or 1 section bound, then do not reorder. */ |
| 1421 | if (w->children.head == NULL |
| 1422 | || (w->children.head->header.type == lang_input_section_enum |
| 1423 | && w->children.head->header.next == NULL)) |
| 1424 | no_reorder = TRUE; |
| 1425 | |
| 1426 | if (w->filenames_sorted) |
| 1427 | no_reorder = TRUE; |
| 1428 | |
| 1429 | /* Check for sorting in a section list wildcard spec as well. */ |
| 1430 | if (!no_reorder) |
| 1431 | { |
| 1432 | struct wildcard_list *l; |
| 1433 | for (l = w->section_list; l != NULL; l = l->next) |
| 1434 | { |
| 1435 | if (l->spec.sorted == by_name) |
| 1436 | { |
| 1437 | no_reorder = TRUE; |
| 1438 | break; |
| 1439 | } |
| 1440 | } |
| 1441 | } |
| 1442 | |
| 1443 | /* Special case until the NOREORDER linker directive is supported: |
| 1444 | *(.init) output sections and *(.fini) specs may NOT be reordered. */ |
| 1445 | |
| 1446 | /* Check for sorting in a section list wildcard spec as well. */ |
| 1447 | if (!no_reorder) |
| 1448 | { |
| 1449 | struct wildcard_list *l; |
| 1450 | for (l = w->section_list; l != NULL; l = l->next) |
| 1451 | { |
| 1452 | if (l->spec.name |
| 1453 | && ((strcmp (".init", l->spec.name) == 0) |
| 1454 | || (strcmp (".fini", l->spec.name) == 0))) |
| 1455 | { |
| 1456 | no_reorder = TRUE; |
| 1457 | break; |
| 1458 | } |
| 1459 | } |
| 1460 | } |
| 1461 | |
| 1462 | #if EXTRA_VALIDATION |
| 1463 | old_child_count = ld_count_children (statement); |
| 1464 | #endif |
| 1465 | |
| 1466 | /* It is now officially a target. Build the graph of source |
| 1467 | section -> target section (kept as a list of edges). */ |
| 1468 | deps = ld_build_required_section_dependence (statement); |
| 1469 | |
| 1470 | /* If this wildcard does not reorder.... */ |
| 1471 | if (!no_reorder && deps->count != 0) |
| 1472 | { |
| 1473 | /* First check for reverse dependences. Fix if possible. */ |
| 1474 | xtensa_layout_wild (deps, w); |
| 1475 | |
| 1476 | xtensa_move_dependencies_to_front (deps, w); |
| 1477 | #if EXTRA_VALIDATION |
| 1478 | new_child_count = ld_count_children (statement); |
| 1479 | ASSERT (new_child_count == old_child_count); |
| 1480 | #endif |
| 1481 | |
| 1482 | xtensa_colocate_literals (deps, statement); |
| 1483 | |
| 1484 | #if EXTRA_VALIDATION |
| 1485 | new_child_count = ld_count_children (statement); |
| 1486 | ASSERT (new_child_count == old_child_count); |
| 1487 | #endif |
| 1488 | } |
| 1489 | |
| 1490 | /* Clean up. */ |
| 1491 | free_reloc_deps_graph (deps); |
| 1492 | } |
| 1493 | } |
| 1494 | |
| 1495 | |
| 1496 | static void |
| 1497 | xtensa_wild_group_interleave (lang_statement_union_type *s) |
| 1498 | { |
| 1499 | lang_for_each_statement_worker (xtensa_wild_group_interleave_callback, s); |
| 1500 | } |
| 1501 | |
| 1502 | |
| 1503 | static void |
| 1504 | xtensa_layout_wild (const reloc_deps_graph *deps, lang_wild_statement_type *w) |
| 1505 | { |
| 1506 | /* If it does not fit initially, we need to do this step. Move all |
| 1507 | of the wild literal sections to a new list, then move each of |
| 1508 | them back in just before the first section they depend on. */ |
| 1509 | lang_statement_union_type **s_p; |
| 1510 | #if EXTRA_VALIDATION |
| 1511 | size_t old_count, new_count; |
| 1512 | size_t ct1, ct2; |
| 1513 | #endif |
| 1514 | |
| 1515 | lang_wild_statement_type literal_wild; |
| 1516 | literal_wild.header.next = NULL; |
| 1517 | literal_wild.header.type = lang_wild_statement_enum; |
| 1518 | literal_wild.filename = NULL; |
| 1519 | literal_wild.filenames_sorted = FALSE; |
| 1520 | literal_wild.section_list = NULL; |
| 1521 | literal_wild.keep_sections = FALSE; |
| 1522 | literal_wild.children.head = NULL; |
| 1523 | literal_wild.children.tail = &literal_wild.children.head; |
| 1524 | |
| 1525 | #if EXTRA_VALIDATION |
| 1526 | old_count = ld_count_children ((lang_statement_union_type*) w); |
| 1527 | #endif |
| 1528 | |
| 1529 | s_p = &w->children.head; |
| 1530 | while (*s_p != NULL) |
| 1531 | { |
| 1532 | lang_statement_union_type *l = *s_p; |
| 1533 | if (l->header.type == lang_input_section_enum) |
| 1534 | { |
| 1535 | if (section_is_target (deps, l) |
| 1536 | && ! section_is_source (deps, l)) |
| 1537 | { |
| 1538 | /* Detach. */ |
| 1539 | *s_p = l->header.next; |
| 1540 | if (*s_p == NULL) |
| 1541 | w->children.tail = s_p; |
| 1542 | l->header.next = NULL; |
| 1543 | |
| 1544 | /* Append. */ |
| 1545 | *literal_wild.children.tail = l; |
| 1546 | literal_wild.children.tail = &l->header.next; |
| 1547 | continue; |
| 1548 | } |
| 1549 | } |
| 1550 | s_p = &(*s_p)->header.next; |
| 1551 | } |
| 1552 | |
| 1553 | #if EXTRA_VALIDATION |
| 1554 | ct1 = ld_count_children ((lang_statement_union_type*) w); |
| 1555 | ct2 = ld_count_children ((lang_statement_union_type*) &literal_wild); |
| 1556 | |
| 1557 | ASSERT (old_count == (ct1 + ct2)); |
| 1558 | #endif |
| 1559 | |
| 1560 | /* Now place them back in front of their dependent sections. */ |
| 1561 | |
| 1562 | while (literal_wild.children.head != NULL) |
| 1563 | { |
| 1564 | lang_statement_union_type *lit = literal_wild.children.head; |
| 1565 | bfd_boolean placed = FALSE; |
| 1566 | |
| 1567 | #if EXTRA_VALIDATION |
| 1568 | ASSERT (ct2 > 0); |
| 1569 | ct2--; |
| 1570 | #endif |
| 1571 | |
| 1572 | /* Detach. */ |
| 1573 | literal_wild.children.head = lit->header.next; |
| 1574 | if (literal_wild.children.head == NULL) |
| 1575 | literal_wild.children.tail = &literal_wild.children.head; |
| 1576 | lit->header.next = NULL; |
| 1577 | |
| 1578 | /* Find a spot to place it. */ |
| 1579 | for (s_p = &w->children.head; *s_p != NULL; s_p = &(*s_p)->header.next) |
| 1580 | { |
| 1581 | lang_statement_union_type *src = *s_p; |
| 1582 | if (deps_has_edge (deps, src, lit)) |
| 1583 | { |
| 1584 | /* Place it here. */ |
| 1585 | lit->header.next = *s_p; |
| 1586 | *s_p = lit; |
| 1587 | placed = TRUE; |
| 1588 | break; |
| 1589 | } |
| 1590 | } |
| 1591 | |
| 1592 | if (!placed) |
| 1593 | { |
| 1594 | /* Put it at the end. */ |
| 1595 | *w->children.tail = lit; |
| 1596 | w->children.tail = &lit->header.next; |
| 1597 | } |
| 1598 | } |
| 1599 | |
| 1600 | #if EXTRA_VALIDATION |
| 1601 | new_count = ld_count_children ((lang_statement_union_type*) w); |
| 1602 | ASSERT (new_count == old_count); |
| 1603 | #endif |
| 1604 | } |
| 1605 | |
| 1606 | |
| 1607 | static void |
| 1608 | xtensa_colocate_output_literals_callback (lang_statement_union_type *statement) |
| 1609 | { |
| 1610 | reloc_deps_graph *deps; |
| 1611 | if (statement->header.type == lang_output_section_statement_enum) |
| 1612 | { |
| 1613 | /* Now, we walk over the contours of the output section statement. |
| 1614 | |
| 1615 | First we build the literal section dependences as before. |
| 1616 | |
| 1617 | At the first uniquely_literal section, we mark it as a good |
| 1618 | spot to place other literals. Continue walking (and counting |
| 1619 | sizes) until we find the next literal section. If this |
| 1620 | section can be moved to the first one, then we move it. If |
| 1621 | we every find a modification of ".", start over. If we find |
| 1622 | a labeling of the current location, start over. Finally, at |
| 1623 | the end, if we require page alignment, add page alignments. */ |
| 1624 | |
| 1625 | #if EXTRA_VALIDATION |
| 1626 | size_t old_child_count; |
| 1627 | size_t new_child_count; |
| 1628 | #endif |
| 1629 | bfd_boolean no_reorder = FALSE; |
| 1630 | |
| 1631 | #if EXTRA_VALIDATION |
| 1632 | old_child_count = ld_count_children (statement); |
| 1633 | #endif |
| 1634 | |
| 1635 | /* It is now officially a target. Build the graph of source |
| 1636 | section -> target section (kept as a list of edges). */ |
| 1637 | |
| 1638 | deps = ld_build_required_section_dependence (statement); |
| 1639 | |
| 1640 | /* If this wildcard does not reorder.... */ |
| 1641 | if (!no_reorder) |
| 1642 | { |
| 1643 | /* First check for reverse dependences. Fix if possible. */ |
| 1644 | xtensa_colocate_literals (deps, statement); |
| 1645 | |
| 1646 | #if EXTRA_VALIDATION |
| 1647 | new_child_count = ld_count_children (statement); |
| 1648 | ASSERT (new_child_count == old_child_count); |
| 1649 | #endif |
| 1650 | } |
| 1651 | |
| 1652 | /* Insert align/offset assignment statement. */ |
| 1653 | if (xtensa_use_literal_pages) |
| 1654 | { |
| 1655 | ld_xtensa_insert_page_offsets (0, statement, deps, |
| 1656 | xtensa_use_literal_pages); |
| 1657 | lang_for_each_statement_worker (xtensa_ldlang_clear_addresses, |
| 1658 | statement); |
| 1659 | } |
| 1660 | |
| 1661 | /* Clean up. */ |
| 1662 | free_reloc_deps_graph (deps); |
| 1663 | } |
| 1664 | } |
| 1665 | |
| 1666 | |
| 1667 | static void |
| 1668 | xtensa_colocate_output_literals (lang_statement_union_type *s) |
| 1669 | { |
| 1670 | lang_for_each_statement_worker (xtensa_colocate_output_literals_callback, s); |
| 1671 | } |
| 1672 | |
| 1673 | |
| 1674 | static void |
| 1675 | xtensa_ldlang_clear_addresses (lang_statement_union_type *statement) |
| 1676 | { |
| 1677 | switch (statement->header.type) |
| 1678 | { |
| 1679 | case lang_input_section_enum: |
| 1680 | { |
| 1681 | asection *bfd_section = statement->input_section.section; |
| 1682 | bfd_section->output_offset = 0; |
| 1683 | } |
| 1684 | break; |
| 1685 | default: |
| 1686 | break; |
| 1687 | } |
| 1688 | } |
| 1689 | |
| 1690 | |
| 1691 | static bfd_vma |
| 1692 | ld_assign_relative_paged_dot (bfd_vma dot, |
| 1693 | lang_statement_union_type *s, |
| 1694 | const reloc_deps_graph *deps ATTRIBUTE_UNUSED, |
| 1695 | bfd_boolean lit_align) |
| 1696 | { |
| 1697 | /* Walk through all of the input statements in this wild statement |
| 1698 | assign dot to all of them. */ |
| 1699 | |
| 1700 | xtensa_ld_iter_stack *stack = NULL; |
| 1701 | xtensa_ld_iter_stack **stack_p = &stack; |
| 1702 | |
| 1703 | bfd_boolean first_section = FALSE; |
| 1704 | bfd_boolean in_literals = FALSE; |
| 1705 | |
| 1706 | for (iter_stack_create (stack_p, s); |
| 1707 | !iter_stack_empty (stack_p); |
| 1708 | iter_stack_next (stack_p)) |
| 1709 | { |
| 1710 | lang_statement_union_type *l = iter_stack_current (stack_p); |
| 1711 | |
| 1712 | switch (l->header.type) |
| 1713 | { |
| 1714 | case lang_input_section_enum: |
| 1715 | { |
| 1716 | asection *section = l->input_section.section; |
| 1717 | size_t align_pow = section->alignment_power; |
| 1718 | bfd_boolean do_xtensa_alignment = FALSE; |
| 1719 | |
| 1720 | if (lit_align) |
| 1721 | { |
| 1722 | bfd_boolean sec_is_target = section_is_target (deps, l); |
| 1723 | bfd_boolean sec_is_source = section_is_source (deps, l); |
| 1724 | |
| 1725 | if (section->size != 0 |
| 1726 | && (first_section |
| 1727 | || (in_literals && !sec_is_target) |
| 1728 | || (!in_literals && sec_is_target))) |
| 1729 | { |
| 1730 | do_xtensa_alignment = TRUE; |
| 1731 | } |
| 1732 | first_section = FALSE; |
| 1733 | if (section->size != 0) |
| 1734 | in_literals = (sec_is_target && !sec_is_source); |
| 1735 | } |
| 1736 | |
| 1737 | if (do_xtensa_alignment && xtensa_page_power != 0) |
| 1738 | dot += (1 << xtensa_page_power); |
| 1739 | |
| 1740 | dot = align_power (dot, align_pow); |
| 1741 | section->output_offset = dot; |
| 1742 | dot += section->size; |
| 1743 | } |
| 1744 | break; |
| 1745 | case lang_fill_statement_enum: |
| 1746 | dot += l->fill_statement.size; |
| 1747 | break; |
| 1748 | case lang_padding_statement_enum: |
| 1749 | dot += l->padding_statement.size; |
| 1750 | break; |
| 1751 | default: |
| 1752 | break; |
| 1753 | } |
| 1754 | } |
| 1755 | return dot; |
| 1756 | } |
| 1757 | |
| 1758 | |
| 1759 | static bfd_boolean |
| 1760 | ld_local_file_relocations_fit (lang_statement_union_type *statement, |
| 1761 | const reloc_deps_graph *deps ATTRIBUTE_UNUSED) |
| 1762 | { |
| 1763 | /* Walk over all of the dependencies that we identified and make |
| 1764 | sure that IF the source and target are here (addr != 0): |
| 1765 | 1) target addr < source addr |
| 1766 | 2) (roundup(source + source_size, 4) - rounddown(target, 4)) |
| 1767 | < (256K - (1 << bad align)) |
| 1768 | Need a worst-case proof.... */ |
| 1769 | |
| 1770 | xtensa_ld_iter_stack *stack = NULL; |
| 1771 | xtensa_ld_iter_stack **stack_p = &stack; |
| 1772 | size_t max_align_power = 0; |
| 1773 | size_t align_penalty = 256; |
| 1774 | reloc_deps_e *e; |
| 1775 | size_t i; |
| 1776 | |
| 1777 | /* Find the worst-case alignment requirement for this set of statements. */ |
| 1778 | for (iter_stack_create (stack_p, statement); |
| 1779 | !iter_stack_empty (stack_p); |
| 1780 | iter_stack_next (stack_p)) |
| 1781 | { |
| 1782 | lang_statement_union_type *l = iter_stack_current (stack_p); |
| 1783 | if (l->header.type == lang_input_section_enum) |
| 1784 | { |
| 1785 | lang_input_section_type *input = &l->input_section; |
| 1786 | asection *section = input->section; |
| 1787 | if (section->alignment_power > max_align_power) |
| 1788 | max_align_power = section->alignment_power; |
| 1789 | } |
| 1790 | } |
| 1791 | |
| 1792 | /* Now check that everything fits. */ |
| 1793 | for (i = 0; i < deps->count; i++) |
| 1794 | { |
| 1795 | asection *sec = deps->sections[i]; |
| 1796 | const reloc_deps_section *deps_section = |
| 1797 | xtensa_get_section_deps (deps, sec); |
| 1798 | if (deps_section) |
| 1799 | { |
| 1800 | /* We choose to walk through the successors. */ |
| 1801 | for (e = deps_section->succs; e != NULL; e = e->next) |
| 1802 | { |
| 1803 | if (e->src != e->tgt |
| 1804 | && e->src->output_section == e->tgt->output_section |
| 1805 | && e->src->output_offset != 0 |
| 1806 | && e->tgt->output_offset != 0) |
| 1807 | { |
| 1808 | bfd_vma l32r_addr = |
| 1809 | align_power (e->src->output_offset + e->src->size, 2); |
| 1810 | bfd_vma target_addr = e->tgt->output_offset & ~3; |
| 1811 | if (l32r_addr < target_addr) |
| 1812 | { |
| 1813 | fflush (stdout); |
| 1814 | fprintf (stderr, "Warning: " |
| 1815 | "l32r target section before l32r\n"); |
| 1816 | fflush (stderr); |
| 1817 | return FALSE; |
| 1818 | } |
| 1819 | |
| 1820 | if (l32r_addr - target_addr > 256 * 1024 - align_penalty) |
| 1821 | return FALSE; |
| 1822 | } |
| 1823 | } |
| 1824 | } |
| 1825 | } |
| 1826 | |
| 1827 | return TRUE; |
| 1828 | } |
| 1829 | |
| 1830 | |
| 1831 | static bfd_vma |
| 1832 | ld_xtensa_insert_page_offsets (bfd_vma dot, |
| 1833 | lang_statement_union_type *s, |
| 1834 | reloc_deps_graph *deps, |
| 1835 | bfd_boolean lit_align) |
| 1836 | { |
| 1837 | xtensa_ld_iter_stack *stack = NULL; |
| 1838 | xtensa_ld_iter_stack **stack_p = &stack; |
| 1839 | |
| 1840 | bfd_boolean first_section = FALSE; |
| 1841 | bfd_boolean in_literals = FALSE; |
| 1842 | |
| 1843 | if (!lit_align) |
| 1844 | return FALSE; |
| 1845 | |
| 1846 | for (iter_stack_create (stack_p, s); |
| 1847 | !iter_stack_empty (stack_p); |
| 1848 | iter_stack_next (stack_p)) |
| 1849 | { |
| 1850 | lang_statement_union_type *l = iter_stack_current (stack_p); |
| 1851 | |
| 1852 | switch (l->header.type) |
| 1853 | { |
| 1854 | case lang_input_section_enum: |
| 1855 | { |
| 1856 | asection *section = l->input_section.section; |
| 1857 | bfd_boolean do_xtensa_alignment = FALSE; |
| 1858 | |
| 1859 | if (lit_align) |
| 1860 | { |
| 1861 | if (section->size != 0 |
| 1862 | && (first_section |
| 1863 | || (in_literals && !section_is_target (deps, l)) |
| 1864 | || (!in_literals && section_is_target (deps, l)))) |
| 1865 | { |
| 1866 | do_xtensa_alignment = TRUE; |
| 1867 | } |
| 1868 | first_section = FALSE; |
| 1869 | if (section->size != 0) |
| 1870 | { |
| 1871 | in_literals = (section_is_target (deps, l) |
| 1872 | && !section_is_source (deps, l)); |
| 1873 | } |
| 1874 | } |
| 1875 | |
| 1876 | if (do_xtensa_alignment && xtensa_page_power != 0) |
| 1877 | { |
| 1878 | /* Create an expression that increments the current address, |
| 1879 | i.e., "dot", by (1 << xtensa_align_power). */ |
| 1880 | etree_type *name_op = exp_nameop (NAME, "."); |
| 1881 | etree_type *addend_op = exp_intop (1 << xtensa_page_power); |
| 1882 | etree_type *add_op = exp_binop ('+', name_op, addend_op); |
| 1883 | etree_type *assign_op = exp_assign (".", add_op, FALSE); |
| 1884 | |
| 1885 | lang_assignment_statement_type *assign_stmt; |
| 1886 | lang_statement_union_type *assign_union; |
| 1887 | lang_statement_list_type tmplist; |
| 1888 | |
| 1889 | /* There is hidden state in "lang_add_assignment". It |
| 1890 | appends the new assignment statement to the stat_ptr |
| 1891 | list. Thus, we swap it before and after the call. */ |
| 1892 | |
| 1893 | lang_list_init (&tmplist); |
| 1894 | push_stat_ptr (&tmplist); |
| 1895 | /* Warning: side effect; statement appended to stat_ptr. */ |
| 1896 | assign_stmt = lang_add_assignment (assign_op); |
| 1897 | assign_union = (lang_statement_union_type *) assign_stmt; |
| 1898 | pop_stat_ptr (); |
| 1899 | |
| 1900 | assign_union->header.next = l; |
| 1901 | *(*stack_p)->iterloc.loc = assign_union; |
| 1902 | iter_stack_next (stack_p); |
| 1903 | } |
| 1904 | } |
| 1905 | break; |
| 1906 | default: |
| 1907 | break; |
| 1908 | } |
| 1909 | } |
| 1910 | return dot; |
| 1911 | } |
| 1912 | |
| 1913 | EOF |
| 1914 | |
| 1915 | # Define some shell vars to insert bits of code into the standard ELF |
| 1916 | # parse_args and list_options functions. |
| 1917 | # |
| 1918 | PARSE_AND_LIST_PROLOGUE=' |
| 1919 | #define OPTION_OPT_SIZEOPT (300) |
| 1920 | #define OPTION_LITERAL_MOVEMENT (OPTION_OPT_SIZEOPT + 1) |
| 1921 | #define OPTION_NO_LITERAL_MOVEMENT (OPTION_LITERAL_MOVEMENT + 1) |
| 1922 | extern int elf32xtensa_size_opt; |
| 1923 | extern int elf32xtensa_no_literal_movement; |
| 1924 | ' |
| 1925 | |
| 1926 | PARSE_AND_LIST_LONGOPTS=' |
| 1927 | { "size-opt", no_argument, NULL, OPTION_OPT_SIZEOPT}, |
| 1928 | { "literal-movement", no_argument, NULL, OPTION_LITERAL_MOVEMENT}, |
| 1929 | { "no-literal-movement", no_argument, NULL, OPTION_NO_LITERAL_MOVEMENT}, |
| 1930 | ' |
| 1931 | |
| 1932 | PARSE_AND_LIST_OPTIONS=' |
| 1933 | fprintf (file, _("\ |
| 1934 | --size-opt When relaxing longcalls, prefer size\n\ |
| 1935 | optimization over branch target alignment\n")); |
| 1936 | ' |
| 1937 | |
| 1938 | PARSE_AND_LIST_ARGS_CASES=' |
| 1939 | case OPTION_OPT_SIZEOPT: |
| 1940 | elf32xtensa_size_opt = 1; |
| 1941 | break; |
| 1942 | case OPTION_LITERAL_MOVEMENT: |
| 1943 | elf32xtensa_no_literal_movement = 0; |
| 1944 | break; |
| 1945 | case OPTION_NO_LITERAL_MOVEMENT: |
| 1946 | elf32xtensa_no_literal_movement = 1; |
| 1947 | break; |
| 1948 | ' |
| 1949 | |
| 1950 | # Replace some of the standard ELF functions with our own versions. |
| 1951 | # |
| 1952 | LDEMUL_BEFORE_PARSE=elf_xtensa_before_parse |
| 1953 | LDEMUL_AFTER_OPEN=elf_xtensa_after_open |
| 1954 | LDEMUL_CHOOSE_TARGET=elf_xtensa_choose_target |
| 1955 | LDEMUL_BEFORE_ALLOCATION=elf_xtensa_before_allocation |