| 1 | # This shell script emits a C file. -*- C -*- |
| 2 | # Copyright 2006, 2007, 2008 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 spu specific |
| 23 | # features. |
| 24 | # |
| 25 | fragment <<EOF |
| 26 | #include "ldctor.h" |
| 27 | #include "elf32-spu.h" |
| 28 | |
| 29 | /* Non-zero if no overlay processing should be done. */ |
| 30 | static int no_overlays = 0; |
| 31 | |
| 32 | /* Non-zero if we want stubs on all calls out of overlay regions. */ |
| 33 | static int non_overlay_stubs = 0; |
| 34 | |
| 35 | /* Whether to emit symbols for stubs. */ |
| 36 | static int emit_stub_syms = 0; |
| 37 | |
| 38 | /* Non-zero to perform stack space analysis. */ |
| 39 | static int stack_analysis = 0; |
| 40 | |
| 41 | /* Whether to emit symbols with stack requirements for each function. */ |
| 42 | static int emit_stack_syms = 0; |
| 43 | |
| 44 | /* Range of valid addresses for loadable sections. */ |
| 45 | static bfd_vma local_store_lo = 0; |
| 46 | static bfd_vma local_store_hi = 0x3ffff; |
| 47 | |
| 48 | static const char ovl_mgr[] = { |
| 49 | EOF |
| 50 | |
| 51 | ../binutils/bin2c < ${srcdir}/emultempl/spu_ovl.o >> e${EMULATION_NAME}.c |
| 52 | |
| 53 | fragment <<EOF |
| 54 | }; |
| 55 | |
| 56 | static const struct _ovl_stream ovl_mgr_stream = { |
| 57 | ovl_mgr, |
| 58 | ovl_mgr + sizeof (ovl_mgr) |
| 59 | }; |
| 60 | |
| 61 | |
| 62 | static int |
| 63 | is_spu_target (void) |
| 64 | { |
| 65 | extern const bfd_target bfd_elf32_spu_vec; |
| 66 | |
| 67 | return link_info.output_bfd->xvec == &bfd_elf32_spu_vec; |
| 68 | } |
| 69 | |
| 70 | /* Create our note section. */ |
| 71 | |
| 72 | static void |
| 73 | spu_after_open (void) |
| 74 | { |
| 75 | if (is_spu_target () |
| 76 | && !link_info.relocatable |
| 77 | && link_info.input_bfds != NULL |
| 78 | && !spu_elf_create_sections (link_info.output_bfd, &link_info, |
| 79 | stack_analysis, emit_stack_syms)) |
| 80 | einfo ("%X%P: can not create note section: %E\n"); |
| 81 | |
| 82 | gld${EMULATION_NAME}_after_open (); |
| 83 | } |
| 84 | |
| 85 | /* If O is NULL, add section S at the end of output section OUTPUT_NAME. |
| 86 | If O is not NULL, add section S at the beginning of output section O. |
| 87 | |
| 88 | Really, we should be duplicating ldlang.c map_input_to_output_sections |
| 89 | logic here, ie. using the linker script to find where the section |
| 90 | goes. That's rather a lot of code, and we don't want to run |
| 91 | map_input_to_output_sections again because most sections are already |
| 92 | mapped. So cheat, and put the section in a fixed place, ignoring any |
| 93 | attempt via a linker script to put .stub, .ovtab, and built-in |
| 94 | overlay manager code somewhere else. */ |
| 95 | |
| 96 | static void |
| 97 | spu_place_special_section (asection *s, asection *o, const char *output_name) |
| 98 | { |
| 99 | lang_output_section_statement_type *os; |
| 100 | |
| 101 | os = lang_output_section_find (o != NULL ? o->name : output_name); |
| 102 | if (os == NULL) |
| 103 | { |
| 104 | const char *save = s->name; |
| 105 | s->name = output_name; |
| 106 | gld${EMULATION_NAME}_place_orphan (s); |
| 107 | s->name = save; |
| 108 | } |
| 109 | else if (o != NULL && os->children.head != NULL) |
| 110 | { |
| 111 | lang_statement_list_type add; |
| 112 | |
| 113 | lang_list_init (&add); |
| 114 | lang_add_section (&add, s, os); |
| 115 | *add.tail = os->children.head; |
| 116 | os->children.head = add.head; |
| 117 | } |
| 118 | else |
| 119 | lang_add_section (&os->children, s, os); |
| 120 | |
| 121 | s->output_section->size += s->size; |
| 122 | } |
| 123 | |
| 124 | /* Load built-in overlay manager, and tweak overlay section alignment. */ |
| 125 | |
| 126 | static void |
| 127 | spu_elf_load_ovl_mgr (void) |
| 128 | { |
| 129 | lang_output_section_statement_type *os; |
| 130 | struct elf_link_hash_entry *h; |
| 131 | |
| 132 | h = elf_link_hash_lookup (elf_hash_table (&link_info), |
| 133 | "__ovly_load", FALSE, FALSE, FALSE); |
| 134 | |
| 135 | if (h != NULL |
| 136 | && (h->root.type == bfd_link_hash_defined |
| 137 | || h->root.type == bfd_link_hash_defweak) |
| 138 | && h->def_regular) |
| 139 | { |
| 140 | /* User supplied __ovly_load. */ |
| 141 | } |
| 142 | else if (ovl_mgr_stream.start == ovl_mgr_stream.end) |
| 143 | einfo ("%F%P: no built-in overlay manager\n"); |
| 144 | else |
| 145 | { |
| 146 | lang_input_statement_type *ovl_is; |
| 147 | |
| 148 | ovl_is = lang_add_input_file ("builtin ovl_mgr", |
| 149 | lang_input_file_is_file_enum, |
| 150 | NULL); |
| 151 | |
| 152 | if (!spu_elf_open_builtin_lib (&ovl_is->the_bfd, &ovl_mgr_stream)) |
| 153 | einfo ("%X%P: can not open built-in overlay manager: %E\n"); |
| 154 | else |
| 155 | { |
| 156 | asection *in; |
| 157 | |
| 158 | if (!load_symbols (ovl_is, NULL)) |
| 159 | einfo ("%X%P: can not load built-in overlay manager: %E\n"); |
| 160 | |
| 161 | /* Map overlay manager sections to output sections. */ |
| 162 | for (in = ovl_is->the_bfd->sections; in != NULL; in = in->next) |
| 163 | if ((in->flags & (SEC_ALLOC | SEC_LOAD)) |
| 164 | == (SEC_ALLOC | SEC_LOAD)) |
| 165 | spu_place_special_section (in, NULL, ".text"); |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | /* Ensure alignment of overlay sections is sufficient. */ |
| 170 | for (os = &lang_output_section_statement.head->output_section_statement; |
| 171 | os != NULL; |
| 172 | os = os->next) |
| 173 | if (os->bfd_section != NULL |
| 174 | && spu_elf_section_data (os->bfd_section) != NULL |
| 175 | && spu_elf_section_data (os->bfd_section)->u.o.ovl_index != 0) |
| 176 | { |
| 177 | if (os->bfd_section->alignment_power < 4) |
| 178 | os->bfd_section->alignment_power = 4; |
| 179 | |
| 180 | /* Also ensure size rounds up. */ |
| 181 | os->block_value = 16; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | /* Go find if we need to do anything special for overlays. */ |
| 186 | |
| 187 | static void |
| 188 | spu_before_allocation (void) |
| 189 | { |
| 190 | if (is_spu_target () |
| 191 | && !link_info.relocatable |
| 192 | && !no_overlays) |
| 193 | { |
| 194 | /* Size the sections. This is premature, but we need to know the |
| 195 | rough layout so that overlays can be found. */ |
| 196 | expld.phase = lang_mark_phase_enum; |
| 197 | expld.dataseg.phase = exp_dataseg_none; |
| 198 | one_lang_size_sections_pass (NULL, TRUE); |
| 199 | |
| 200 | /* Find overlays by inspecting section vmas. */ |
| 201 | if (spu_elf_find_overlays (link_info.output_bfd, &link_info)) |
| 202 | { |
| 203 | int ret; |
| 204 | |
| 205 | ret = spu_elf_size_stubs (link_info.output_bfd, &link_info, |
| 206 | spu_place_special_section, |
| 207 | non_overlay_stubs); |
| 208 | if (ret == 0) |
| 209 | einfo ("%X%P: can not size overlay stubs: %E\n"); |
| 210 | else if (ret == 2) |
| 211 | spu_elf_load_ovl_mgr (); |
| 212 | } |
| 213 | |
| 214 | /* We must not cache anything from the preliminary sizing. */ |
| 215 | lang_reset_memory_regions (); |
| 216 | } |
| 217 | |
| 218 | gld${EMULATION_NAME}_before_allocation (); |
| 219 | } |
| 220 | |
| 221 | /* Final emulation specific call. */ |
| 222 | |
| 223 | static void |
| 224 | gld${EMULATION_NAME}_finish (void) |
| 225 | { |
| 226 | int need_laying_out; |
| 227 | |
| 228 | need_laying_out = bfd_elf_discard_info (link_info.output_bfd, &link_info); |
| 229 | |
| 230 | gld${EMULATION_NAME}_map_segments (need_laying_out); |
| 231 | |
| 232 | if (is_spu_target () && local_store_lo < local_store_hi) |
| 233 | { |
| 234 | asection *s; |
| 235 | |
| 236 | s = spu_elf_check_vma (link_info.output_bfd, |
| 237 | local_store_lo, local_store_hi); |
| 238 | if (s != NULL) |
| 239 | einfo ("%X%P: %A exceeds local store range\n", s); |
| 240 | } |
| 241 | |
| 242 | if (!spu_elf_build_stubs (&link_info, |
| 243 | emit_stub_syms || link_info.emitrelocations)) |
| 244 | einfo ("%X%P: can not build overlay stubs: %E\n"); |
| 245 | |
| 246 | finish_default (); |
| 247 | } |
| 248 | |
| 249 | EOF |
| 250 | |
| 251 | if grep -q 'ld_elf.*ppc.*_emulation' ldemul-list.h; then |
| 252 | fragment <<EOF |
| 253 | #include "filenames.h" |
| 254 | #include <fcntl.h> |
| 255 | #include <sys/wait.h> |
| 256 | |
| 257 | struct tflist { |
| 258 | struct tflist *next; |
| 259 | char name[9]; |
| 260 | }; |
| 261 | |
| 262 | static struct tflist *tmp_file_list; |
| 263 | |
| 264 | static void clean_tmp (void) |
| 265 | { |
| 266 | for (; tmp_file_list != NULL; tmp_file_list = tmp_file_list->next) |
| 267 | unlink (tmp_file_list->name); |
| 268 | } |
| 269 | |
| 270 | static const char * |
| 271 | base_name (const char *path) |
| 272 | { |
| 273 | const char *file = strrchr (path, '/'); |
| 274 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
| 275 | { |
| 276 | char *bslash = strrchr (path, '\\\\'); |
| 277 | |
| 278 | if (file == NULL || (bslash != NULL && bslash > file)) |
| 279 | file = bslash; |
| 280 | if (file == NULL |
| 281 | && path[0] != '\0' |
| 282 | && path[1] == ':') |
| 283 | file = path + 1; |
| 284 | } |
| 285 | #endif |
| 286 | if (file == NULL) |
| 287 | file = path; |
| 288 | else |
| 289 | ++file; |
| 290 | return file; |
| 291 | } |
| 292 | |
| 293 | /* This function is called when building a ppc32 or ppc64 executable |
| 294 | to handle embedded spu images. */ |
| 295 | extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *); |
| 296 | |
| 297 | bfd_boolean |
| 298 | embedded_spu_file (lang_input_statement_type *entry, const char *flags) |
| 299 | { |
| 300 | const char *cmd[6]; |
| 301 | const char *sym; |
| 302 | char *handle, *p; |
| 303 | struct tflist *tf; |
| 304 | char *oname; |
| 305 | int fd; |
| 306 | pid_t pid; |
| 307 | int status; |
| 308 | union lang_statement_union **old_stat_tail; |
| 309 | union lang_statement_union **old_file_tail; |
| 310 | union lang_statement_union *new_ent; |
| 311 | lang_input_statement_type *search; |
| 312 | |
| 313 | if (entry->the_bfd->format != bfd_object |
| 314 | || strcmp (entry->the_bfd->xvec->name, "elf32-spu") != 0 |
| 315 | || (entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_EXEC |
| 316 | && entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_DYN)) |
| 317 | return FALSE; |
| 318 | |
| 319 | /* Use the filename as the symbol marking the program handle struct. */ |
| 320 | sym = base_name (entry->the_bfd->filename); |
| 321 | |
| 322 | handle = xstrdup (sym); |
| 323 | for (p = handle; *p; ++p) |
| 324 | if (!(ISALNUM (*p) || *p == '$' || *p == '.')) |
| 325 | *p = '_'; |
| 326 | |
| 327 | if (tmp_file_list == NULL) |
| 328 | atexit (clean_tmp); |
| 329 | tf = xmalloc (sizeof (*tf)); |
| 330 | tf->next = tmp_file_list; |
| 331 | tmp_file_list = tf; |
| 332 | oname = tf->name; |
| 333 | memcpy (tf->name, "ldXXXXXX", sizeof (tf->name)); |
| 334 | |
| 335 | #ifdef HAVE_MKSTEMP |
| 336 | fd = mkstemp (oname); |
| 337 | #else |
| 338 | oname = mktemp (oname); |
| 339 | if (oname == NULL) |
| 340 | return FALSE; |
| 341 | fd = open (oname, O_RDWR | O_CREAT | O_EXCL, 0600); |
| 342 | #endif |
| 343 | if (fd == -1) |
| 344 | return FALSE; |
| 345 | close (fd); |
| 346 | |
| 347 | for (search = (lang_input_statement_type *) input_file_chain.head; |
| 348 | search != NULL; |
| 349 | search = (lang_input_statement_type *) search->next_real_file) |
| 350 | if (search->filename != NULL) |
| 351 | { |
| 352 | const char *infile = base_name (search->filename); |
| 353 | |
| 354 | if (strncmp (infile, "crtbegin", 8) == 0) |
| 355 | { |
| 356 | if (infile[8] == 'S') |
| 357 | flags = concat (flags, " -fPIC", (const char *) NULL); |
| 358 | else if (infile[8] == 'T') |
| 359 | flags = concat (flags, " -fpie", (const char *) NULL); |
| 360 | break; |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | /* Use fork() and exec() rather than system() so that we don't |
| 365 | need to worry about quoting args. */ |
| 366 | cmd[0] = EMBEDSPU; |
| 367 | cmd[1] = flags; |
| 368 | cmd[2] = handle; |
| 369 | cmd[3] = entry->the_bfd->filename; |
| 370 | cmd[4] = oname; |
| 371 | cmd[5] = NULL; |
| 372 | if (trace_file_tries) |
| 373 | { |
| 374 | info_msg (_("running: %s \"%s\" \"%s\" \"%s\" \"%s\"\n"), |
| 375 | cmd[0], cmd[1], cmd[2], cmd[3], cmd[4]); |
| 376 | fflush (stdout); |
| 377 | } |
| 378 | |
| 379 | pid = fork (); |
| 380 | if (pid == -1) |
| 381 | return FALSE; |
| 382 | if (pid == 0) |
| 383 | { |
| 384 | execvp (cmd[0], (char *const *) cmd); |
| 385 | if (strcmp ("embedspu", EMBEDSPU) != 0) |
| 386 | { |
| 387 | cmd[0] = "embedspu"; |
| 388 | execvp (cmd[0], (char *const *) cmd); |
| 389 | } |
| 390 | perror (cmd[0]); |
| 391 | _exit (127); |
| 392 | } |
| 393 | #ifdef HAVE_WAITPID |
| 394 | #define WAITFOR(PID, STAT) waitpid (PID, STAT, 0) |
| 395 | #else |
| 396 | #define WAITFOR(PID, STAT) wait (STAT) |
| 397 | #endif |
| 398 | if (WAITFOR (pid, &status) != pid |
| 399 | || !WIFEXITED (status) |
| 400 | || WEXITSTATUS (status) != 0) |
| 401 | return FALSE; |
| 402 | #undef WAITFOR |
| 403 | |
| 404 | old_stat_tail = stat_ptr->tail; |
| 405 | old_file_tail = input_file_chain.tail; |
| 406 | if (lang_add_input_file (oname, lang_input_file_is_file_enum, NULL) == NULL) |
| 407 | return FALSE; |
| 408 | |
| 409 | /* lang_add_input_file put the new list entry at the end of the statement |
| 410 | and input file lists. Move it to just after the current entry. */ |
| 411 | new_ent = *old_stat_tail; |
| 412 | *old_stat_tail = NULL; |
| 413 | stat_ptr->tail = old_stat_tail; |
| 414 | *old_file_tail = NULL; |
| 415 | input_file_chain.tail = old_file_tail; |
| 416 | new_ent->header.next = entry->header.next; |
| 417 | entry->header.next = new_ent; |
| 418 | new_ent->input_statement.next_real_file = entry->next_real_file; |
| 419 | entry->next_real_file = new_ent; |
| 420 | |
| 421 | /* Ensure bfd sections are excluded from the output. */ |
| 422 | bfd_section_list_clear (entry->the_bfd); |
| 423 | entry->loaded = TRUE; |
| 424 | return TRUE; |
| 425 | } |
| 426 | |
| 427 | EOF |
| 428 | fi |
| 429 | |
| 430 | # Define some shell vars to insert bits of code into the standard elf |
| 431 | # parse_args and list_options functions. |
| 432 | # |
| 433 | PARSE_AND_LIST_PROLOGUE=' |
| 434 | #define OPTION_SPU_PLUGIN 301 |
| 435 | #define OPTION_SPU_NO_OVERLAYS (OPTION_SPU_PLUGIN + 1) |
| 436 | #define OPTION_SPU_STUB_SYMS (OPTION_SPU_NO_OVERLAYS + 1) |
| 437 | #define OPTION_SPU_NON_OVERLAY_STUBS (OPTION_SPU_STUB_SYMS + 1) |
| 438 | #define OPTION_SPU_LOCAL_STORE (OPTION_SPU_NON_OVERLAY_STUBS + 1) |
| 439 | #define OPTION_SPU_STACK_ANALYSIS (OPTION_SPU_LOCAL_STORE + 1) |
| 440 | #define OPTION_SPU_STACK_SYMS (OPTION_SPU_STACK_ANALYSIS + 1) |
| 441 | ' |
| 442 | |
| 443 | PARSE_AND_LIST_LONGOPTS=' |
| 444 | { "plugin", no_argument, NULL, OPTION_SPU_PLUGIN }, |
| 445 | { "no-overlays", no_argument, NULL, OPTION_SPU_NO_OVERLAYS }, |
| 446 | { "emit-stub-syms", no_argument, NULL, OPTION_SPU_STUB_SYMS }, |
| 447 | { "extra-overlay-stubs", no_argument, NULL, OPTION_SPU_NON_OVERLAY_STUBS }, |
| 448 | { "local-store", required_argument, NULL, OPTION_SPU_LOCAL_STORE }, |
| 449 | { "stack-analysis", no_argument, NULL, OPTION_SPU_STACK_ANALYSIS }, |
| 450 | { "emit-stack-syms", no_argument, NULL, OPTION_SPU_STACK_SYMS }, |
| 451 | ' |
| 452 | |
| 453 | PARSE_AND_LIST_OPTIONS=' |
| 454 | fprintf (file, _("\ |
| 455 | --plugin Make SPU plugin.\n\ |
| 456 | --no-overlays No overlay handling.\n\ |
| 457 | --emit-stub-syms Add symbols on overlay call stubs.\n\ |
| 458 | --extra-overlay-stubs Add stubs on all calls out of overlay regions.\n\ |
| 459 | --local-store=lo:hi Valid address range.\n\ |
| 460 | --stack-analysis Estimate maximum stack requirement.\n\ |
| 461 | --emit-stack-syms Add sym giving stack needed for each func.\n" |
| 462 | )); |
| 463 | ' |
| 464 | |
| 465 | PARSE_AND_LIST_ARGS_CASES=' |
| 466 | case OPTION_SPU_PLUGIN: |
| 467 | spu_elf_plugin (1); |
| 468 | break; |
| 469 | |
| 470 | case OPTION_SPU_NO_OVERLAYS: |
| 471 | no_overlays = 1; |
| 472 | break; |
| 473 | |
| 474 | case OPTION_SPU_STUB_SYMS: |
| 475 | emit_stub_syms = 1; |
| 476 | break; |
| 477 | |
| 478 | case OPTION_SPU_NON_OVERLAY_STUBS: |
| 479 | non_overlay_stubs = 1; |
| 480 | break; |
| 481 | |
| 482 | case OPTION_SPU_LOCAL_STORE: |
| 483 | { |
| 484 | char *end; |
| 485 | local_store_lo = strtoul (optarg, &end, 0); |
| 486 | if (*end == '\'':'\'') |
| 487 | { |
| 488 | local_store_hi = strtoul (end + 1, &end, 0); |
| 489 | if (*end == 0) |
| 490 | break; |
| 491 | } |
| 492 | einfo (_("%P%F: invalid --local-store address range `%s'\''\n"), optarg); |
| 493 | } |
| 494 | break; |
| 495 | |
| 496 | case OPTION_SPU_STACK_ANALYSIS: |
| 497 | stack_analysis = 1; |
| 498 | break; |
| 499 | |
| 500 | case OPTION_SPU_STACK_SYMS: |
| 501 | emit_stack_syms = 1; |
| 502 | break; |
| 503 | ' |
| 504 | |
| 505 | LDEMUL_AFTER_OPEN=spu_after_open |
| 506 | LDEMUL_BEFORE_ALLOCATION=spu_before_allocation |
| 507 | LDEMUL_FINISH=gld${EMULATION_NAME}_finish |