| 1 | # This shell script emits a C file. -*- C -*- |
| 2 | # It does some substitutions. |
| 3 | fragment <<EOF |
| 4 | /* This file is is generated by a shell script. DO NOT EDIT! */ |
| 5 | |
| 6 | /* Emulate the original gld for the given ${EMULATION_NAME} |
| 7 | Copyright (C) 2014-2018 Free Software Foundation, Inc. |
| 8 | Written by Steve Chamberlain steve@cygnus.com |
| 9 | Extended for the MSP430 by Nick Clifton nickc@redhat.com |
| 10 | |
| 11 | This file is part of the GNU Binutils. |
| 12 | |
| 13 | This program is free software; you can redistribute it and/or modify |
| 14 | it under the terms of the GNU General Public License as published by |
| 15 | the Free Software Foundation; either version 3 of the License, or |
| 16 | (at your option) any later version. |
| 17 | |
| 18 | This program is distributed in the hope that it will be useful, |
| 19 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | GNU General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with this program; if not, write to the Free Software |
| 25 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 26 | MA 02110-1301, USA. */ |
| 27 | |
| 28 | #define TARGET_IS_${EMULATION_NAME} |
| 29 | |
| 30 | #include "sysdep.h" |
| 31 | #include "bfd.h" |
| 32 | #include "bfdlink.h" |
| 33 | |
| 34 | #include "ld.h" |
| 35 | #include "getopt.h" |
| 36 | #include "ldmain.h" |
| 37 | #include "ldmisc.h" |
| 38 | #include "ldexp.h" |
| 39 | #include "ldlang.h" |
| 40 | #include "ldfile.h" |
| 41 | #include "ldemul.h" |
| 42 | #include "libiberty.h" |
| 43 | #include <ldgram.h> |
| 44 | |
| 45 | enum regions |
| 46 | { |
| 47 | REGION_NONE = 0, |
| 48 | REGION_LOWER, |
| 49 | REGION_UPPER, |
| 50 | REGION_EITHER = 3, |
| 51 | }; |
| 52 | |
| 53 | enum either_placement_stage |
| 54 | { |
| 55 | LOWER_TO_UPPER, |
| 56 | UPPER_TO_LOWER, |
| 57 | }; |
| 58 | |
| 59 | enum { ROM, RAM }; |
| 60 | |
| 61 | static int data_region = REGION_NONE; |
| 62 | static int code_region = REGION_NONE; |
| 63 | static bfd_boolean disable_sec_transformation = FALSE; |
| 64 | |
| 65 | #define MAX_PREFIX_LENGTH 7 |
| 66 | |
| 67 | EOF |
| 68 | |
| 69 | # Import any needed special functions and/or overrides. |
| 70 | # |
| 71 | if test -n "$EXTRA_EM_FILE" ; then |
| 72 | source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em |
| 73 | fi |
| 74 | |
| 75 | if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then |
| 76 | fragment <<EOF |
| 77 | |
| 78 | static void |
| 79 | gld${EMULATION_NAME}_before_parse (void) |
| 80 | { |
| 81 | #ifndef TARGET_ /* I.e., if not generic. */ |
| 82 | ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); |
| 83 | #endif /* not TARGET_ */ |
| 84 | |
| 85 | /* The MSP430 port *needs* linker relaxtion in order to cope with large |
| 86 | functions where conditional branches do not fit into a +/- 1024 byte range. */ |
| 87 | if (!bfd_link_relocatable (&link_info)) |
| 88 | TARGET_ENABLE_RELAXATION; |
| 89 | } |
| 90 | |
| 91 | EOF |
| 92 | fi |
| 93 | |
| 94 | if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then |
| 95 | fragment <<EOF |
| 96 | |
| 97 | static char * |
| 98 | gld${EMULATION_NAME}_get_script (int *isfile) |
| 99 | EOF |
| 100 | |
| 101 | if test x"$COMPILE_IN" = xyes |
| 102 | then |
| 103 | # Scripts compiled in. |
| 104 | |
| 105 | # sed commands to quote an ld script as a C string. |
| 106 | sc="-f stringify.sed" |
| 107 | |
| 108 | fragment <<EOF |
| 109 | { |
| 110 | *isfile = 0; |
| 111 | |
| 112 | if (bfd_link_relocatable (&link_info) && config.build_constructors) |
| 113 | return |
| 114 | EOF |
| 115 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c |
| 116 | echo ' ; else if (bfd_link_relocatable (&link_info)) return' >> e${EMULATION_NAME}.c |
| 117 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c |
| 118 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c |
| 119 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c |
| 120 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c |
| 121 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c |
| 122 | echo ' ; else return' >> e${EMULATION_NAME}.c |
| 123 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c |
| 124 | echo '; }' >> e${EMULATION_NAME}.c |
| 125 | |
| 126 | else |
| 127 | # Scripts read from the filesystem. |
| 128 | |
| 129 | fragment <<EOF |
| 130 | { |
| 131 | *isfile = 1; |
| 132 | |
| 133 | if (bfd_link_relocatable (&link_info) && config.build_constructors) |
| 134 | return "ldscripts/${EMULATION_NAME}.xu"; |
| 135 | else if (bfd_link_relocatable (&link_info)) |
| 136 | return "ldscripts/${EMULATION_NAME}.xr"; |
| 137 | else if (!config.text_read_only) |
| 138 | return "ldscripts/${EMULATION_NAME}.xbn"; |
| 139 | else if (!config.magic_demand_paged) |
| 140 | return "ldscripts/${EMULATION_NAME}.xn"; |
| 141 | else |
| 142 | return "ldscripts/${EMULATION_NAME}.x"; |
| 143 | } |
| 144 | EOF |
| 145 | fi |
| 146 | fi |
| 147 | |
| 148 | if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then |
| 149 | fragment <<EOF |
| 150 | |
| 151 | static unsigned int |
| 152 | data_statement_size (lang_data_statement_type *d) |
| 153 | { |
| 154 | unsigned int size = 0; |
| 155 | switch (d->type) |
| 156 | { |
| 157 | case QUAD: |
| 158 | case SQUAD: |
| 159 | size = QUAD_SIZE; |
| 160 | break; |
| 161 | case LONG: |
| 162 | size = LONG_SIZE; |
| 163 | break; |
| 164 | case SHORT: |
| 165 | size = SHORT_SIZE; |
| 166 | break; |
| 167 | case BYTE: |
| 168 | size = BYTE_SIZE; |
| 169 | break; |
| 170 | default: |
| 171 | einfo (_("%P: error: unhandled data_statement size\n")); |
| 172 | FAIL (); |
| 173 | } |
| 174 | return size; |
| 175 | } |
| 176 | |
| 177 | /* Helper function for place_orphan that computes the size |
| 178 | of sections already mapped to the given statement. */ |
| 179 | |
| 180 | static bfd_size_type |
| 181 | scan_children (lang_statement_union_type * l) |
| 182 | { |
| 183 | bfd_size_type amount = 0; |
| 184 | |
| 185 | while (l != NULL) |
| 186 | { |
| 187 | switch (l->header.type) |
| 188 | { |
| 189 | case lang_input_section_enum: |
| 190 | if (l->input_section.section->flags & SEC_ALLOC) |
| 191 | amount += l->input_section.section->size; |
| 192 | break; |
| 193 | |
| 194 | case lang_constructors_statement_enum: |
| 195 | case lang_assignment_statement_enum: |
| 196 | case lang_padding_statement_enum: |
| 197 | break; |
| 198 | |
| 199 | case lang_wild_statement_enum: |
| 200 | amount += scan_children (l->wild_statement.children.head); |
| 201 | break; |
| 202 | |
| 203 | case lang_data_statement_enum: |
| 204 | amount += data_statement_size (&l->data_statement); |
| 205 | break; |
| 206 | |
| 207 | default: |
| 208 | fprintf (stderr, "msp430 orphan placer: unhandled lang type %d\n", l->header.type); |
| 209 | break; |
| 210 | } |
| 211 | |
| 212 | l = l->header.next; |
| 213 | } |
| 214 | |
| 215 | return amount; |
| 216 | } |
| 217 | |
| 218 | /* Place an orphan section. We use this to put .either sections |
| 219 | into either their lower or their upper equivalents. */ |
| 220 | |
| 221 | static lang_output_section_statement_type * |
| 222 | gld${EMULATION_NAME}_place_orphan (asection * s, |
| 223 | const char * secname, |
| 224 | int constraint) |
| 225 | { |
| 226 | char * lower_name; |
| 227 | char * upper_name; |
| 228 | char * name; |
| 229 | char * buf = NULL; |
| 230 | lang_output_section_statement_type * lower; |
| 231 | lang_output_section_statement_type * upper; |
| 232 | |
| 233 | if ((s->flags & SEC_ALLOC) == 0) |
| 234 | return NULL; |
| 235 | |
| 236 | if (bfd_link_relocatable (&link_info)) |
| 237 | return NULL; |
| 238 | |
| 239 | /* If constraints are involved let the linker handle the placement normally. */ |
| 240 | if (constraint != 0) |
| 241 | return NULL; |
| 242 | |
| 243 | /* We only need special handling for .either sections. */ |
| 244 | if (strncmp (secname, ".either.", 8) != 0) |
| 245 | return NULL; |
| 246 | |
| 247 | /* Skip the .either prefix. */ |
| 248 | secname += 7; |
| 249 | |
| 250 | /* Compute the names of the corresponding upper and lower |
| 251 | sections. If the input section name contains another period, |
| 252 | only use the part of the name before the second dot. */ |
| 253 | if (strchr (secname + 1, '.') != NULL) |
| 254 | { |
| 255 | buf = name = xstrdup (secname); |
| 256 | |
| 257 | * strchr (name + 1, '.') = 0; |
| 258 | } |
| 259 | else |
| 260 | name = (char *) secname; |
| 261 | |
| 262 | lower_name = concat (".lower", name, NULL); |
| 263 | upper_name = concat (".upper", name, NULL); |
| 264 | |
| 265 | /* Find the corresponding lower and upper sections. */ |
| 266 | lower = lang_output_section_find (lower_name); |
| 267 | upper = lang_output_section_find (upper_name); |
| 268 | |
| 269 | if (lower == NULL && upper == NULL) |
| 270 | { |
| 271 | einfo (_("%P: error: no section named %s or %s in linker script\n"), |
| 272 | lower_name, upper_name); |
| 273 | goto end; |
| 274 | } |
| 275 | else if (lower == NULL) |
| 276 | { |
| 277 | lower = lang_output_section_find (name); |
| 278 | if (lower == NULL) |
| 279 | { |
| 280 | einfo (_("%P: error: no section named %s in linker script\n"), name); |
| 281 | goto end; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | /* Always place orphaned sections in lower. Optimal placement of either |
| 286 | sections is performed later, once section sizes have been finalized. */ |
| 287 | lang_add_section (& lower->children, s, NULL, lower); |
| 288 | end: |
| 289 | free (upper_name); |
| 290 | free (lower_name); |
| 291 | if (buf) |
| 292 | free (buf); |
| 293 | return lower; |
| 294 | } |
| 295 | EOF |
| 296 | fi |
| 297 | |
| 298 | fragment <<EOF |
| 299 | |
| 300 | static bfd_boolean |
| 301 | change_output_section (lang_statement_union_type ** head, |
| 302 | asection *s, |
| 303 | lang_output_section_statement_type * new_output_section) |
| 304 | { |
| 305 | asection *is; |
| 306 | lang_statement_union_type * prev = NULL; |
| 307 | lang_statement_union_type * curr; |
| 308 | |
| 309 | curr = *head; |
| 310 | while (curr != NULL) |
| 311 | { |
| 312 | switch (curr->header.type) |
| 313 | { |
| 314 | case lang_input_section_enum: |
| 315 | is = curr->input_section.section; |
| 316 | if (is == s) |
| 317 | { |
| 318 | s->output_section = NULL; |
| 319 | lang_add_section (& (new_output_section->children), s, NULL, |
| 320 | new_output_section); |
| 321 | /* Remove the section from the old output section. */ |
| 322 | if (prev == NULL) |
| 323 | *head = curr->header.next; |
| 324 | else |
| 325 | prev->header.next = curr->header.next; |
| 326 | return TRUE; |
| 327 | } |
| 328 | break; |
| 329 | case lang_wild_statement_enum: |
| 330 | if (change_output_section (&(curr->wild_statement.children.head), |
| 331 | s, new_output_section)) |
| 332 | return TRUE; |
| 333 | break; |
| 334 | default: |
| 335 | break; |
| 336 | } |
| 337 | prev = curr; |
| 338 | curr = curr->header.next; |
| 339 | } |
| 340 | return FALSE; |
| 341 | } |
| 342 | |
| 343 | static void |
| 344 | move_prefixed_section (asection *s, char *new_name, |
| 345 | lang_output_section_statement_type * new_output_sec) |
| 346 | { |
| 347 | s->name = new_name; |
| 348 | if (s->output_section == NULL) |
| 349 | lang_add_section (& (new_output_sec->children), s, NULL, new_output_sec); |
| 350 | else |
| 351 | { |
| 352 | lang_output_section_statement_type * curr_output_sec |
| 353 | = lang_output_section_find (s->output_section->name); |
| 354 | change_output_section (&(curr_output_sec->children.head), s, |
| 355 | new_output_sec); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | static void |
| 360 | add_region_prefix (bfd *abfd, asection *s, |
| 361 | ATTRIBUTE_UNUSED void *unused) |
| 362 | { |
| 363 | const char *curr_name = bfd_get_section_name (abfd, s); |
| 364 | char * base_name; |
| 365 | char * new_input_sec_name = NULL; |
| 366 | char * new_output_sec_name = NULL; |
| 367 | int region = REGION_NONE; |
| 368 | |
| 369 | if (strncmp (curr_name, ".text", 5) == 0) |
| 370 | { |
| 371 | region = code_region; |
| 372 | base_name = concat (".text", NULL); |
| 373 | } |
| 374 | else if (strncmp (curr_name, ".data", 5) == 0) |
| 375 | { |
| 376 | region = data_region; |
| 377 | base_name = concat (".data", NULL); |
| 378 | } |
| 379 | else if (strncmp (curr_name, ".bss", 4) == 0) |
| 380 | { |
| 381 | region = data_region; |
| 382 | base_name = concat (".bss", NULL); |
| 383 | } |
| 384 | else if (strncmp (curr_name, ".rodata", 7) == 0) |
| 385 | { |
| 386 | region = data_region; |
| 387 | base_name = concat (".rodata", NULL); |
| 388 | } |
| 389 | else |
| 390 | return; |
| 391 | |
| 392 | switch (region) |
| 393 | { |
| 394 | case REGION_NONE: |
| 395 | break; |
| 396 | case REGION_UPPER: |
| 397 | new_input_sec_name = concat (".upper", curr_name, NULL); |
| 398 | new_output_sec_name = concat (".upper", base_name, NULL); |
| 399 | lang_output_section_statement_type * upper |
| 400 | = lang_output_section_find (new_output_sec_name); |
| 401 | if (upper != NULL) |
| 402 | { |
| 403 | move_prefixed_section (s, new_input_sec_name, upper); |
| 404 | } |
| 405 | else |
| 406 | einfo (_("%P: error: no section named %s in linker script\n"), |
| 407 | new_output_sec_name); |
| 408 | break; |
| 409 | case REGION_LOWER: |
| 410 | new_input_sec_name = concat (".lower", curr_name, NULL); |
| 411 | new_output_sec_name = concat (".lower", base_name, NULL); |
| 412 | lang_output_section_statement_type * lower |
| 413 | = lang_output_section_find (new_output_sec_name); |
| 414 | if (lower != NULL) |
| 415 | { |
| 416 | move_prefixed_section (s, new_input_sec_name, lower); |
| 417 | } |
| 418 | else |
| 419 | einfo (_("%P: error: no section named %s in linker script\n"), |
| 420 | new_output_sec_name); |
| 421 | break; |
| 422 | case REGION_EITHER: |
| 423 | s->name = concat (".either", curr_name, NULL); |
| 424 | break; |
| 425 | default: |
| 426 | /* Unreachable. */ |
| 427 | FAIL (); |
| 428 | break; |
| 429 | } |
| 430 | free (base_name); |
| 431 | if (new_input_sec_name) |
| 432 | { |
| 433 | free (new_input_sec_name); |
| 434 | free (new_output_sec_name); |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | static void |
| 439 | msp430_elf_after_open (void) |
| 440 | { |
| 441 | bfd *abfd; |
| 442 | |
| 443 | gld${EMULATION_NAME}_after_open (); |
| 444 | |
| 445 | /* If neither --code-region or --data-region have been passed, do not |
| 446 | transform sections names. */ |
| 447 | if ((code_region == REGION_NONE && data_region == REGION_NONE) |
| 448 | || disable_sec_transformation) |
| 449 | return; |
| 450 | |
| 451 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) |
| 452 | bfd_map_over_sections (abfd, add_region_prefix, NULL); |
| 453 | } |
| 454 | |
| 455 | #define OPTION_CODE_REGION 321 |
| 456 | #define OPTION_DATA_REGION (OPTION_CODE_REGION + 1) |
| 457 | #define OPTION_DISABLE_TRANS (OPTION_CODE_REGION + 2) |
| 458 | |
| 459 | static void |
| 460 | gld${EMULATION_NAME}_add_options |
| 461 | (int ns, char **shortopts, int nl, struct option **longopts, |
| 462 | int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED) |
| 463 | { |
| 464 | static const char xtra_short[] = { }; |
| 465 | |
| 466 | static const struct option xtra_long[] = |
| 467 | { |
| 468 | { "code-region", required_argument, NULL, OPTION_CODE_REGION }, |
| 469 | { "data-region", required_argument, NULL, OPTION_DATA_REGION }, |
| 470 | { "disable-sec-transformation", no_argument, NULL, |
| 471 | OPTION_DISABLE_TRANS }, |
| 472 | { NULL, no_argument, NULL, 0 } |
| 473 | }; |
| 474 | |
| 475 | *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short)); |
| 476 | memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short)); |
| 477 | *longopts = (struct option *) |
| 478 | xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long)); |
| 479 | memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long)); |
| 480 | } |
| 481 | |
| 482 | static void |
| 483 | gld${EMULATION_NAME}_list_options (FILE * file) |
| 484 | { |
| 485 | fprintf (file, _(" --code-region={either,lower,upper,none}\n\ |
| 486 | Transform .text* sections to {either,lower,upper,none}.text* sections\n")); |
| 487 | fprintf (file, _(" --data-region={either,lower,upper,none}\n\ |
| 488 | Transform .data*, .rodata* and .bss* sections to\n\ |
| 489 | {either,lower,upper,none}.{bss,data,rodata}* sections\n")); |
| 490 | fprintf (file, _(" --disable-sec-transformation\n\ |
| 491 | Disable transformation of .{text,data,bss,rodata}* sections to\n\ |
| 492 | add the {either,lower,upper,none} prefixes\n")); |
| 493 | } |
| 494 | |
| 495 | static bfd_boolean |
| 496 | gld${EMULATION_NAME}_handle_option (int optc) |
| 497 | { |
| 498 | switch (optc) |
| 499 | { |
| 500 | case OPTION_CODE_REGION: |
| 501 | if (strcmp (optarg, "upper") == 0) |
| 502 | code_region = REGION_UPPER; |
| 503 | else if (strcmp (optarg, "lower") == 0) |
| 504 | code_region = REGION_LOWER; |
| 505 | else if (strcmp (optarg, "either") == 0) |
| 506 | code_region = REGION_EITHER; |
| 507 | else if (strcmp (optarg, "none") == 0) |
| 508 | code_region = REGION_NONE; |
| 509 | else if (strlen (optarg) == 0) |
| 510 | { |
| 511 | einfo (_("%P: --code-region requires an argument: " |
| 512 | "{upper,lower,either,none}\n")); |
| 513 | return FALSE; |
| 514 | } |
| 515 | else |
| 516 | { |
| 517 | einfo (_("%P: error: unrecognized argument to --code-region= option: " |
| 518 | "\"%s\"\n"), optarg); |
| 519 | return FALSE; |
| 520 | } |
| 521 | break; |
| 522 | |
| 523 | case OPTION_DATA_REGION: |
| 524 | if (strcmp (optarg, "upper") == 0) |
| 525 | data_region = REGION_UPPER; |
| 526 | else if (strcmp (optarg, "lower") == 0) |
| 527 | data_region = REGION_LOWER; |
| 528 | else if (strcmp (optarg, "either") == 0) |
| 529 | data_region = REGION_EITHER; |
| 530 | else if (strcmp (optarg, "none") == 0) |
| 531 | data_region = REGION_NONE; |
| 532 | else if (strlen (optarg) == 0) |
| 533 | { |
| 534 | einfo (_("%P: --data-region requires an argument: " |
| 535 | "{upper,lower,either,none}\n")); |
| 536 | return FALSE; |
| 537 | } |
| 538 | else |
| 539 | { |
| 540 | einfo (_("%P: error: unrecognized argument to --data-region= option: " |
| 541 | "\"%s\"\n"), optarg); |
| 542 | return FALSE; |
| 543 | } |
| 544 | break; |
| 545 | |
| 546 | case OPTION_DISABLE_TRANS: |
| 547 | disable_sec_transformation = TRUE; |
| 548 | break; |
| 549 | |
| 550 | default: |
| 551 | return FALSE; |
| 552 | } |
| 553 | return TRUE; |
| 554 | } |
| 555 | |
| 556 | static void |
| 557 | eval_upper_either_sections (bfd *abfd, asection *s, void *data) |
| 558 | { |
| 559 | const char * base_sec_name; |
| 560 | const char * curr_name; |
| 561 | char * either_name; |
| 562 | int curr_region; |
| 563 | |
| 564 | lang_output_section_statement_type * lower; |
| 565 | lang_output_section_statement_type * upper; |
| 566 | static bfd_size_type *lower_size = 0; |
| 567 | static bfd_size_type *upper_size = 0; |
| 568 | static bfd_size_type lower_size_rom = 0; |
| 569 | static bfd_size_type lower_size_ram = 0; |
| 570 | static bfd_size_type upper_size_rom = 0; |
| 571 | static bfd_size_type upper_size_ram = 0; |
| 572 | |
| 573 | if ((s->flags & SEC_ALLOC) == 0) |
| 574 | return; |
| 575 | if (bfd_link_relocatable (&link_info)) |
| 576 | return; |
| 577 | |
| 578 | base_sec_name = (const char *) data; |
| 579 | curr_name = bfd_get_section_name (abfd, s); |
| 580 | |
| 581 | /* Only concerned with .either input sections in the upper output section. */ |
| 582 | either_name = concat (".either", base_sec_name, NULL); |
| 583 | if (strncmp (curr_name, either_name, strlen (either_name)) != 0 |
| 584 | || strncmp (s->output_section->name, ".upper", 6) != 0) |
| 585 | goto end; |
| 586 | |
| 587 | lower = lang_output_section_find (concat (".lower", base_sec_name, NULL)); |
| 588 | upper = lang_output_section_find (concat (".upper", base_sec_name, NULL)); |
| 589 | |
| 590 | if (upper == NULL || upper->region == NULL) |
| 591 | goto end; |
| 592 | else if (lower == NULL) |
| 593 | lower = lang_output_section_find (base_sec_name); |
| 594 | if (lower == NULL || lower->region == NULL) |
| 595 | goto end; |
| 596 | |
| 597 | if (strcmp (base_sec_name, ".text") == 0 |
| 598 | || strcmp (base_sec_name, ".rodata") == 0) |
| 599 | curr_region = ROM; |
| 600 | else |
| 601 | curr_region = RAM; |
| 602 | |
| 603 | if (curr_region == ROM) |
| 604 | { |
| 605 | if (lower_size_rom == 0) |
| 606 | { |
| 607 | lower_size_rom = lower->region->current - lower->region->origin; |
| 608 | upper_size_rom = upper->region->current - upper->region->origin; |
| 609 | } |
| 610 | lower_size = &lower_size_rom; |
| 611 | upper_size = &upper_size_rom; |
| 612 | } |
| 613 | else if (curr_region == RAM) |
| 614 | { |
| 615 | if (lower_size_ram == 0) |
| 616 | { |
| 617 | lower_size_ram = lower->region->current - lower->region->origin; |
| 618 | upper_size_ram = upper->region->current - upper->region->origin; |
| 619 | } |
| 620 | lower_size = &lower_size_ram; |
| 621 | upper_size = &upper_size_ram; |
| 622 | } |
| 623 | |
| 624 | /* Move sections in the upper region that would fit in the lower |
| 625 | region to the lower region. */ |
| 626 | if (*lower_size + s->size < lower->region->length) |
| 627 | { |
| 628 | if (change_output_section (&(upper->children.head), s, lower)) |
| 629 | { |
| 630 | *upper_size -= s->size; |
| 631 | *lower_size += s->size; |
| 632 | } |
| 633 | } |
| 634 | end: |
| 635 | free (either_name); |
| 636 | } |
| 637 | |
| 638 | static void |
| 639 | eval_lower_either_sections (bfd *abfd, asection *s, void *data) |
| 640 | { |
| 641 | const char * base_sec_name; |
| 642 | const char * curr_name; |
| 643 | char * either_name; |
| 644 | int curr_region; |
| 645 | lang_output_section_statement_type * output_sec; |
| 646 | lang_output_section_statement_type * lower; |
| 647 | lang_output_section_statement_type * upper; |
| 648 | |
| 649 | static bfd_size_type *lower_size = 0; |
| 650 | static bfd_size_type lower_size_rom = 0; |
| 651 | static bfd_size_type lower_size_ram = 0; |
| 652 | |
| 653 | if ((s->flags & SEC_ALLOC) == 0) |
| 654 | return; |
| 655 | if (bfd_link_relocatable (&link_info)) |
| 656 | return; |
| 657 | |
| 658 | base_sec_name = (const char *) data; |
| 659 | curr_name = bfd_get_section_name (abfd, s); |
| 660 | |
| 661 | /* Only concerned with .either input sections in the lower or "default" |
| 662 | output section i.e. not in the upper output section. */ |
| 663 | either_name = concat (".either", base_sec_name, NULL); |
| 664 | if (strncmp (curr_name, either_name, strlen (either_name)) != 0 |
| 665 | || strncmp (s->output_section->name, ".upper", 6) == 0) |
| 666 | return; |
| 667 | |
| 668 | if (strcmp (base_sec_name, ".text") == 0 |
| 669 | || strcmp (base_sec_name, ".rodata") == 0) |
| 670 | curr_region = ROM; |
| 671 | else |
| 672 | curr_region = RAM; |
| 673 | |
| 674 | output_sec = lang_output_section_find (s->output_section->name); |
| 675 | |
| 676 | /* If the output_section doesn't exist, this has already been reported in |
| 677 | place_orphan, so don't need to warn again. */ |
| 678 | if (output_sec == NULL || output_sec->region == NULL) |
| 679 | goto end; |
| 680 | |
| 681 | /* lower and output_sec might be the same, but in some cases an .either |
| 682 | section can end up in base_sec_name if it hasn't been placed by |
| 683 | place_orphan. */ |
| 684 | lower = lang_output_section_find (concat (".lower", base_sec_name, NULL)); |
| 685 | upper = lang_output_section_find (concat (".upper", base_sec_name, NULL)); |
| 686 | if (upper == NULL) |
| 687 | goto end; |
| 688 | |
| 689 | if (curr_region == ROM) |
| 690 | { |
| 691 | if (lower_size_rom == 0) |
| 692 | { |
| 693 | /* Get the size of other items in the lower region that aren't the |
| 694 | sections to be moved around. */ |
| 695 | lower_size_rom |
| 696 | = (output_sec->region->current - output_sec->region->origin) |
| 697 | - scan_children (output_sec->children.head); |
| 698 | if (output_sec != lower && lower != NULL) |
| 699 | lower_size_rom -= scan_children (lower->children.head); |
| 700 | } |
| 701 | lower_size = &lower_size_rom; |
| 702 | } |
| 703 | else if (curr_region == RAM) |
| 704 | { |
| 705 | if (lower_size_ram == 0) |
| 706 | { |
| 707 | lower_size_ram |
| 708 | = (output_sec->region->current - output_sec->region->origin) |
| 709 | - scan_children (output_sec->children.head); |
| 710 | if (output_sec != lower && lower != NULL) |
| 711 | lower_size_ram -= scan_children (lower->children.head); |
| 712 | } |
| 713 | lower_size = &lower_size_ram; |
| 714 | } |
| 715 | /* Move sections that cause the lower region to overflow to the upper region. */ |
| 716 | if (*lower_size + s->size > output_sec->region->length) |
| 717 | change_output_section (&(output_sec->children.head), s, upper); |
| 718 | else |
| 719 | *lower_size += s->size; |
| 720 | end: |
| 721 | free (either_name); |
| 722 | } |
| 723 | |
| 724 | /* This function is similar to lang_relax_sections, but without the size |
| 725 | evaluation code that is always executed after relaxation. */ |
| 726 | static void |
| 727 | intermediate_relax_sections (void) |
| 728 | { |
| 729 | int i = link_info.relax_pass; |
| 730 | |
| 731 | /* The backend can use it to determine the current pass. */ |
| 732 | link_info.relax_pass = 0; |
| 733 | |
| 734 | while (i--) |
| 735 | { |
| 736 | bfd_boolean relax_again; |
| 737 | |
| 738 | link_info.relax_trip = -1; |
| 739 | do |
| 740 | { |
| 741 | link_info.relax_trip++; |
| 742 | |
| 743 | lang_do_assignments (lang_assigning_phase_enum); |
| 744 | |
| 745 | lang_reset_memory_regions (); |
| 746 | |
| 747 | relax_again = FALSE; |
| 748 | lang_size_sections (&relax_again, FALSE); |
| 749 | } |
| 750 | while (relax_again); |
| 751 | |
| 752 | link_info.relax_pass++; |
| 753 | } |
| 754 | } |
| 755 | |
| 756 | static void |
| 757 | msp430_elf_after_allocation (void) |
| 758 | { |
| 759 | int relax_count = 0; |
| 760 | unsigned int i; |
| 761 | /* Go over each section twice, once to place either sections that don't fit |
| 762 | in lower into upper, and then again to move any sections in upper that |
| 763 | fit in lower into lower. */ |
| 764 | for (i = 0; i < 8; i++) |
| 765 | { |
| 766 | int placement_stage = (i < 4) ? LOWER_TO_UPPER : UPPER_TO_LOWER; |
| 767 | const char * base_sec_name; |
| 768 | lang_output_section_statement_type * upper; |
| 769 | |
| 770 | switch (i % 4) |
| 771 | { |
| 772 | default: |
| 773 | case 0: |
| 774 | base_sec_name = ".text"; |
| 775 | break; |
| 776 | case 1: |
| 777 | base_sec_name = ".data"; |
| 778 | break; |
| 779 | case 2: |
| 780 | base_sec_name = ".bss"; |
| 781 | break; |
| 782 | case 3: |
| 783 | base_sec_name = ".rodata"; |
| 784 | break; |
| 785 | } |
| 786 | upper = lang_output_section_find (concat (".upper", base_sec_name, NULL)); |
| 787 | if (upper != NULL) |
| 788 | { |
| 789 | /* Can't just use one iteration over the all the sections to make |
| 790 | both lower->upper and upper->lower transformations because the |
| 791 | iterator encounters upper sections before all lower sections have |
| 792 | been examined. */ |
| 793 | bfd *abfd; |
| 794 | |
| 795 | if (placement_stage == LOWER_TO_UPPER) |
| 796 | { |
| 797 | /* Perform relaxation and get the final size of sections |
| 798 | before trying to fit .either sections in the correct |
| 799 | ouput sections. */ |
| 800 | if (relax_count == 0) |
| 801 | { |
| 802 | intermediate_relax_sections (); |
| 803 | relax_count++; |
| 804 | } |
| 805 | for (abfd = link_info.input_bfds; abfd != NULL; |
| 806 | abfd = abfd->link.next) |
| 807 | { |
| 808 | bfd_map_over_sections (abfd, eval_lower_either_sections, |
| 809 | (void *) base_sec_name); |
| 810 | } |
| 811 | } |
| 812 | else if (placement_stage == UPPER_TO_LOWER) |
| 813 | { |
| 814 | /* Relax again before moving upper->lower. */ |
| 815 | if (relax_count == 1) |
| 816 | { |
| 817 | intermediate_relax_sections (); |
| 818 | relax_count++; |
| 819 | } |
| 820 | for (abfd = link_info.input_bfds; abfd != NULL; |
| 821 | abfd = abfd->link.next) |
| 822 | { |
| 823 | bfd_map_over_sections (abfd, eval_upper_either_sections, |
| 824 | (void *) base_sec_name); |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | } |
| 829 | } |
| 830 | gld${EMULATION_NAME}_after_allocation (); |
| 831 | } |
| 832 | |
| 833 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = |
| 834 | { |
| 835 | ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse}, |
| 836 | ${LDEMUL_SYSLIB-syslib_default}, |
| 837 | ${LDEMUL_HLL-hll_default}, |
| 838 | ${LDEMUL_AFTER_PARSE-after_parse_default}, |
| 839 | msp430_elf_after_open, |
| 840 | after_check_relocs_default, |
| 841 | msp430_elf_after_allocation, |
| 842 | ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default}, |
| 843 | ${LDEMUL_CHOOSE_TARGET-ldemul_default_target}, |
| 844 | ${LDEMUL_BEFORE_ALLOCATION-before_allocation_default}, |
| 845 | ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script}, |
| 846 | "${EMULATION_NAME}", |
| 847 | "${OUTPUT_FORMAT}", |
| 848 | ${LDEMUL_FINISH-finish_default}, |
| 849 | ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL}, |
| 850 | ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-NULL}, |
| 851 | ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan}, |
| 852 | ${LDEMUL_SET_SYMBOLS-NULL}, |
| 853 | ${LDEMUL_PARSE_ARGS-NULL}, |
| 854 | gld${EMULATION_NAME}_add_options, |
| 855 | gld${EMULATION_NAME}_handle_option, |
| 856 | ${LDEMUL_UNRECOGNIZED_FILE-NULL}, |
| 857 | gld${EMULATION_NAME}_list_options, |
| 858 | ${LDEMUL_RECOGNIZED_FILE-NULL}, |
| 859 | ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL}, |
| 860 | ${LDEMUL_NEW_VERS_PATTERN-NULL}, |
| 861 | ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL} |
| 862 | }; |
| 863 | EOF |
| 864 | # \f |
| 865 | # Local Variables: |
| 866 | # mode: c |
| 867 | # End: |