ld/emultempl/spuelf.em

   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 /* Control --auto-overlay feature.  */
  49 static int auto_overlay = 0;
  50 static char *auto_overlay_file = 0;
  51 static unsigned int auto_overlay_fixed = 0;
  52 static unsigned int auto_overlay_reserved = 0;
  53 static int extra_stack_space = 2000;
  54 int my_argc;
  55 char **my_argv;
  56
  57 static const char ovl_mgr[] = {
  58 EOF
  59
  60 ../binutils/bin2c < ${srcdir}/emultempl/spu_ovl.o >> e${EMULATION_NAME}.c
  61
  62 fragment <<EOF
  63 };
  64
  65 static const struct _ovl_stream ovl_mgr_stream = {
  66   ovl_mgr,
  67   ovl_mgr + sizeof (ovl_mgr)
  68 };
  69
  70
  71 static int
  72 is_spu_target (void)
  73 {
  74   extern const bfd_target bfd_elf32_spu_vec;
  75
  76   return link_info.output_bfd->xvec == &bfd_elf32_spu_vec;
  77 }
  78
  79 /* Create our note section.  */
  80
  81 static void
  82 spu_after_open (void)
  83 {
  84   if (is_spu_target ()
  85       && !link_info.relocatable
  86       && link_info.input_bfds != NULL
  87       && !spu_elf_create_sections (&link_info,
  88                                    stack_analysis, emit_stack_syms))
  89     einfo ("%X%P: can not create note section: %E\n");
  90
  91   gld${EMULATION_NAME}_after_open ();
  92 }
  93
  94 /* If O is NULL, add section S at the end of output section OUTPUT_NAME.
  95    If O is not NULL, add section S at the beginning of output section O.
  96
  97    Really, we should be duplicating ldlang.c map_input_to_output_sections
  98    logic here, ie. using the linker script to find where the section
  99    goes.  That's rather a lot of code, and we don't want to run
 100    map_input_to_output_sections again because most sections are already
 101    mapped.  So cheat, and put the section in a fixed place, ignoring any
 102    attempt via a linker script to put .stub, .ovtab, and built-in
 103    overlay manager code somewhere else.  */
 104
 105 static void
 106 spu_place_special_section (asection *s, asection *o, const char *output_name)
 107 {
 108   lang_output_section_statement_type *os;
 109
 110   os = lang_output_section_find (o != NULL ? o->name : output_name);
 111   if (os == NULL)
 112     {
 113       const char *save = s->name;
 114       s->name = output_name;
 115       gld${EMULATION_NAME}_place_orphan (s);
 116       s->name = save;
 117     }
 118   else if (o != NULL && os->children.head != NULL)
 119     {
 120       lang_statement_list_type add;
 121
 122       lang_list_init (&add);
 123       lang_add_section (&add, s, os);
 124       *add.tail = os->children.head;
 125       os->children.head = add.head;
 126     }
 127   else
 128     lang_add_section (&os->children, s, os);
 129
 130   s->output_section->size += s->size;
 131 }
 132
 133 /* Load built-in overlay manager, and tweak overlay section alignment.  */
 134
 135 static void
 136 spu_elf_load_ovl_mgr (void)
 137 {
 138   lang_output_section_statement_type *os;
 139   struct elf_link_hash_entry *h;
 140
 141   h = elf_link_hash_lookup (elf_hash_table (&link_info),
 142                             "__ovly_load", FALSE, FALSE, FALSE);
 143
 144   if (h != NULL
 145       && (h->root.type == bfd_link_hash_defined
 146           || h->root.type == bfd_link_hash_defweak)
 147       && h->def_regular)
 148     {
 149       /* User supplied __ovly_load.  */
 150     }
 151   else if (ovl_mgr_stream.start == ovl_mgr_stream.end)
 152     einfo ("%F%P: no built-in overlay manager\n");
 153   else
 154     {
 155       lang_input_statement_type *ovl_is;
 156
 157       ovl_is = lang_add_input_file ("builtin ovl_mgr",
 158                                     lang_input_file_is_file_enum,
 159                                     NULL);
 160
 161       if (!spu_elf_open_builtin_lib (&ovl_is->the_bfd, &ovl_mgr_stream))
 162         einfo ("%X%P: can not open built-in overlay manager: %E\n");
 163       else
 164         {
 165           asection *in;
 166
 167           if (!load_symbols (ovl_is, NULL))
 168             einfo ("%X%P: can not load built-in overlay manager: %E\n");
 169
 170           /* Map overlay manager sections to output sections.  */
 171           for (in = ovl_is->the_bfd->sections; in != NULL; in = in->next)
 172             if ((in->flags & (SEC_ALLOC | SEC_LOAD))
 173                 == (SEC_ALLOC | SEC_LOAD))
 174               spu_place_special_section (in, NULL, ".text");
 175         }
 176     }
 177
 178   /* Ensure alignment of overlay sections is sufficient.  */
 179   for (os = &lang_output_section_statement.head->output_section_statement;
 180        os != NULL;
 181        os = os->next)
 182     if (os->bfd_section != NULL
 183         && spu_elf_section_data (os->bfd_section) != NULL
 184         && spu_elf_section_data (os->bfd_section)->u.o.ovl_index != 0)
 185       {
 186         if (os->bfd_section->alignment_power < 4)
 187           os->bfd_section->alignment_power = 4;
 188
 189         /* Also ensure size rounds up.  */
 190         os->block_value = 16;
 191       }
 192 }
 193
 194 /* Go find if we need to do anything special for overlays.  */
 195
 196 static void
 197 spu_before_allocation (void)
 198 {
 199   if (is_spu_target ()
 200       && !link_info.relocatable
 201       && !no_overlays)
 202     {
 203       /* Size the sections.  This is premature, but we need to know the
 204          rough layout so that overlays can be found.  */
 205       expld.phase = lang_mark_phase_enum;
 206       expld.dataseg.phase = exp_dataseg_none;
 207       one_lang_size_sections_pass (NULL, TRUE);
 208
 209       /* Find overlays by inspecting section vmas.  */
 210       if (spu_elf_find_overlays (&link_info))
 211         {
 212           int ret;
 213
 214           if (auto_overlay != 0)
 215             {
 216               einfo ("%P: --auto-overlay ignored with user overlay script\n");
 217               auto_overlay = 0;
 218             }
 219
 220           ret = spu_elf_size_stubs (&link_info,
 221                                     spu_place_special_section,
 222                                     non_overlay_stubs);
 223           if (ret == 0)
 224             einfo ("%X%P: can not size overlay stubs: %E\n");
 225           else if (ret == 2)
 226             spu_elf_load_ovl_mgr ();
 227         }
 228
 229       /* We must not cache anything from the preliminary sizing.  */
 230       lang_reset_memory_regions ();
 231     }
 232
 233   gld${EMULATION_NAME}_before_allocation ();
 234 }
 235
 236 struct tflist {
 237   struct tflist *next;
 238   char name[9];
 239 };
 240
 241 static struct tflist *tmp_file_list;
 242
 243 static void clean_tmp (void)
 244 {
 245   for (; tmp_file_list != NULL; tmp_file_list = tmp_file_list->next)
 246     unlink (tmp_file_list->name);
 247 }
 248
 249 static int
 250 new_tmp_file (char **fname)
 251 {
 252   struct tflist *tf;
 253   int fd;
 254
 255   if (tmp_file_list == NULL)
 256     atexit (clean_tmp);
 257   tf = xmalloc (sizeof (*tf));
 258   tf->next = tmp_file_list;
 259   tmp_file_list = tf;
 260   memcpy (tf->name, "ldXXXXXX", sizeof (tf->name));
 261   *fname = tf->name;
 262 #ifdef HAVE_MKSTEMP
 263   fd = mkstemp (*fname);
 264 #else
 265   *fname = mktemp (*fname);
 266   if (*fname == NULL)
 267     return -1;
 268   fd = open (fname, O_RDWR | O_CREAT | O_EXCL, 0600);
 269 #endif
 270   return fd;
 271 }
 272
 273 static FILE *
 274 spu_elf_open_overlay_script (void)
 275 {
 276   FILE *script = NULL;
 277
 278   if (auto_overlay_file == NULL)
 279     {
 280       int fd = new_tmp_file (&auto_overlay_file);
 281       if (fd == -1)
 282         goto file_err;
 283       script = fdopen (fd, "w");
 284     }
 285   else
 286     script = fopen (auto_overlay_file, "w");
 287
 288   if (script == NULL)
 289     {
 290     file_err:
 291       einfo ("%F%P: can not open script: %E\n");
 292     }
 293   return script;
 294 }
 295
 296 static void
 297 spu_elf_relink (void)
 298 {
 299   char **argv = xmalloc ((my_argc + 4) * sizeof (*argv));
 300
 301   memcpy (argv, my_argv, my_argc * sizeof (*argv));
 302   argv[my_argc++] = "--no-auto-overlay";
 303   if (tmp_file_list->name == auto_overlay_file)
 304     argv[my_argc - 1] = concat (argv[my_argc - 1], "=",
 305                                 auto_overlay_file, (const char *) NULL);
 306   argv[my_argc++] = "-T";
 307   argv[my_argc++] = auto_overlay_file;
 308   argv[my_argc] = 0;
 309   execvp (argv[0], (char *const *) argv);
 310   perror (argv[0]);
 311   _exit (127);
 312 }
 313
 314 /* Final emulation specific call.  */
 315
 316 static void
 317 gld${EMULATION_NAME}_finish (void)
 318 {
 319   int need_laying_out;
 320
 321   need_laying_out = bfd_elf_discard_info (link_info.output_bfd, &link_info);
 322
 323   gld${EMULATION_NAME}_map_segments (need_laying_out);
 324
 325   if (is_spu_target ())
 326     {
 327       if (local_store_lo < local_store_hi)
 328         {
 329           asection *s;
 330
 331           s = spu_elf_check_vma (&link_info, auto_overlay,
 332                                  local_store_lo, local_store_hi,
 333                                  auto_overlay_fixed, auto_overlay_reserved,
 334                                  extra_stack_space,
 335                                  spu_elf_load_ovl_mgr,
 336                                  spu_elf_open_overlay_script,
 337                                  spu_elf_relink);
 338           if (s != NULL && !auto_overlay)
 339             einfo ("%X%P: %A exceeds local store range\n", s);
 340         }
 341       else if (auto_overlay)
 342         einfo ("%P: --auto-overlay ignored with zero local store range\n");
 343
 344       if (!spu_elf_build_stubs (&link_info,
 345                                 emit_stub_syms || link_info.emitrelocations))
 346         einfo ("%X%P: can not build overlay stubs: %E\n");
 347     }
 348
 349   finish_default ();
 350 }
 351
 352 static char *
 353 gld${EMULATION_NAME}_choose_target (int argc, char *argv[])
 354 {
 355   my_argc = argc;
 356   my_argv = argv;
 357   return ldemul_default_target (argc, argv);
 358 }
 359
 360 EOF
 361
 362 if grep -q 'ld_elf.*ppc.*_emulation' ldemul-list.h; then
 363   fragment <<EOF
 364 #include "filenames.h"
 365 #include <fcntl.h>
 366 #include <sys/wait.h>
 367
 368 static const char *
 369 base_name (const char *path)
 370 {
 371   const char *file = strrchr (path, '/');
 372 #ifdef HAVE_DOS_BASED_FILE_SYSTEM
 373   {
 374     char *bslash = strrchr (path, '\\\\');
 375
 376     if (file == NULL || (bslash != NULL && bslash > file))
 377       file = bslash;
 378     if (file == NULL
 379         && path[0] != '\0'
 380         && path[1] == ':')
 381       file = path + 1;
 382   }
 383 #endif
 384   if (file == NULL)
 385     file = path;
 386   else
 387     ++file;
 388   return file;
 389 }
 390
 391 /* This function is called when building a ppc32 or ppc64 executable
 392    to handle embedded spu images.  */
 393 extern bfd_boolean embedded_spu_file (lang_input_statement_type *, const char *);
 394
 395 bfd_boolean
 396 embedded_spu_file (lang_input_statement_type *entry, const char *flags)
 397 {
 398   const char *cmd[6];
 399   const char *sym;
 400   char *handle, *p;
 401   char *oname;
 402   int fd;
 403   pid_t pid;
 404   int status;
 405   union lang_statement_union **old_stat_tail;
 406   union lang_statement_union **old_file_tail;
 407   union lang_statement_union *new_ent;
 408   lang_input_statement_type *search;
 409
 410   if (entry->the_bfd->format != bfd_object
 411       || strcmp (entry->the_bfd->xvec->name, "elf32-spu") != 0
 412       || (entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_EXEC
 413           && entry->the_bfd->tdata.elf_obj_data->elf_header->e_type != ET_DYN))
 414     return FALSE;
 415
 416   /* Use the filename as the symbol marking the program handle struct.  */
 417   sym = base_name (entry->the_bfd->filename);
 418
 419   handle = xstrdup (sym);
 420   for (p = handle; *p; ++p)
 421     if (!(ISALNUM (*p) || *p == '$' || *p == '.'))
 422       *p = '_';
 423
 424   fd = new_tmp_file (&oname);
 425   if (fd == -1)
 426     return FALSE;
 427   close (fd);
 428
 429   for (search = (lang_input_statement_type *) input_file_chain.head;
 430        search != NULL;
 431        search = (lang_input_statement_type *) search->next_real_file)
 432     if (search->filename != NULL)
 433       {
 434         const char *infile = base_name (search->filename);
 435
 436         if (strncmp (infile, "crtbegin", 8) == 0)
 437           {
 438             if (infile[8] == 'S')
 439               flags = concat (flags, " -fPIC", (const char *) NULL);
 440             else if (infile[8] == 'T')
 441               flags = concat (flags, " -fpie", (const char *) NULL);
 442             break;
 443           }
 444       }
 445
 446   /* Use fork() and exec() rather than system() so that we don't
 447      need to worry about quoting args.  */
 448   cmd[0] = EMBEDSPU;
 449   cmd[1] = flags;
 450   cmd[2] = handle;
 451   cmd[3] = entry->the_bfd->filename;
 452   cmd[4] = oname;
 453   cmd[5] = NULL;
 454   if (trace_file_tries)
 455     {
 456       info_msg (_("running: %s \"%s\" \"%s\" \"%s\" \"%s\"\n"),
 457                 cmd[0], cmd[1], cmd[2], cmd[3], cmd[4]);
 458       fflush (stdout);
 459     }
 460
 461   pid = fork ();
 462   if (pid == -1)
 463     return FALSE;
 464   if (pid == 0)
 465     {
 466       execvp (cmd[0], (char *const *) cmd);
 467       if (strcmp ("embedspu", EMBEDSPU) != 0)
 468         {
 469           cmd[0] = "embedspu";
 470           execvp (cmd[0], (char *const *) cmd);
 471         }
 472       perror (cmd[0]);
 473       _exit (127);
 474     }
 475 #ifdef HAVE_WAITPID
 476 #define WAITFOR(PID, STAT) waitpid (PID, STAT, 0)
 477 #else
 478 #define WAITFOR(PID, STAT) wait (STAT)
 479 #endif
 480   if (WAITFOR (pid, &status) != pid
 481       || !WIFEXITED (status)
 482       || WEXITSTATUS (status) != 0)
 483     return FALSE;
 484 #undef WAITFOR
 485
 486   old_stat_tail = stat_ptr->tail;
 487   old_file_tail = input_file_chain.tail;
 488   if (lang_add_input_file (oname, lang_input_file_is_file_enum, NULL) == NULL)
 489     return FALSE;
 490
 491   /* lang_add_input_file put the new list entry at the end of the statement
 492      and input file lists.  Move it to just after the current entry.  */
 493   new_ent = *old_stat_tail;
 494   *old_stat_tail = NULL;
 495   stat_ptr->tail = old_stat_tail;
 496   *old_file_tail = NULL;
 497   input_file_chain.tail = old_file_tail;
 498   new_ent->header.next = entry->header.next;
 499   entry->header.next = new_ent;
 500   new_ent->input_statement.next_real_file = entry->next_real_file;
 501   entry->next_real_file = new_ent;
 502
 503   /* Ensure bfd sections are excluded from the output.  */
 504   bfd_section_list_clear (entry->the_bfd);
 505   entry->loaded = TRUE;
 506   return TRUE;
 507 }
 508
 509 EOF
 510 fi
 511
 512 # Define some shell vars to insert bits of code into the standard elf
 513 # parse_args and list_options functions.
 514 #
 515 PARSE_AND_LIST_PROLOGUE='
 516 #define OPTION_SPU_PLUGIN               301
 517 #define OPTION_SPU_NO_OVERLAYS          (OPTION_SPU_PLUGIN + 1)
 518 #define OPTION_SPU_STUB_SYMS            (OPTION_SPU_NO_OVERLAYS + 1)
 519 #define OPTION_SPU_NON_OVERLAY_STUBS    (OPTION_SPU_STUB_SYMS + 1)
 520 #define OPTION_SPU_LOCAL_STORE          (OPTION_SPU_NON_OVERLAY_STUBS + 1)
 521 #define OPTION_SPU_STACK_ANALYSIS       (OPTION_SPU_LOCAL_STORE + 1)
 522 #define OPTION_SPU_STACK_SYMS           (OPTION_SPU_STACK_ANALYSIS + 1)
 523 #define OPTION_SPU_AUTO_OVERLAY         (OPTION_SPU_STACK_SYMS + 1)
 524 #define OPTION_SPU_AUTO_RELINK          (OPTION_SPU_AUTO_OVERLAY + 1)
 525 #define OPTION_SPU_OVERLAY_RODATA       (OPTION_SPU_AUTO_RELINK + 1)
 526 #define OPTION_SPU_FIXED_SPACE          (OPTION_SPU_OVERLAY_RODATA + 1)
 527 #define OPTION_SPU_RESERVED_SPACE       (OPTION_SPU_FIXED_SPACE + 1)
 528 #define OPTION_SPU_EXTRA_STACK          (OPTION_SPU_RESERVED_SPACE + 1)
 529 #define OPTION_SPU_NO_AUTO_OVERLAY      (OPTION_SPU_EXTRA_STACK + 1)
 530 '
 531
 532 PARSE_AND_LIST_LONGOPTS='
 533   { "plugin", no_argument, NULL, OPTION_SPU_PLUGIN },
 534   { "no-overlays", no_argument, NULL, OPTION_SPU_NO_OVERLAYS },
 535   { "emit-stub-syms", no_argument, NULL, OPTION_SPU_STUB_SYMS },
 536   { "extra-overlay-stubs", no_argument, NULL, OPTION_SPU_NON_OVERLAY_STUBS },
 537   { "local-store", required_argument, NULL, OPTION_SPU_LOCAL_STORE },
 538   { "stack-analysis", no_argument, NULL, OPTION_SPU_STACK_ANALYSIS },
 539   { "emit-stack-syms", no_argument, NULL, OPTION_SPU_STACK_SYMS },
 540   { "auto-overlay", optional_argument, NULL, OPTION_SPU_AUTO_OVERLAY },
 541   { "auto-relink", no_argument, NULL, OPTION_SPU_AUTO_RELINK },
 542   { "overlay-rodata", no_argument, NULL, OPTION_SPU_OVERLAY_RODATA },
 543   { "fixed-space", required_argument, NULL, OPTION_SPU_FIXED_SPACE },
 544   { "reserved-space", required_argument, NULL, OPTION_SPU_RESERVED_SPACE },
 545   { "extra-stack-space", required_argument, NULL, OPTION_SPU_EXTRA_STACK },
 546   { "no-auto-overlay", optional_argument, NULL, OPTION_SPU_NO_AUTO_OVERLAY },
 547 '
 548
 549 PARSE_AND_LIST_OPTIONS='
 550   fprintf (file, _("\
 551   --plugin                    Make SPU plugin.\n\
 552   --no-overlays               No overlay handling.\n\
 553   --emit-stub-syms            Add symbols on overlay call stubs.\n\
 554   --extra-overlay-stubs       Add stubs on all calls out of overlay regions.\n\
 555   --local-store=lo:hi         Valid address range.\n\
 556   --stack-analysis            Estimate maximum stack requirement.\n\
 557   --emit-stack-syms           Add sym giving stack needed for each func.\n\
 558   --auto-overlay [=filename]  Create an overlay script in filename if\n\
 559                               executable does not fit in local store.\n\
 560   --auto-relink               Rerun linker using auto-overlay script.\n\
 561   --overlay-rodata            Place read-only data with associated function\n\
 562                               code in overlays.\n\
 563   --fixed-space=bytes         Local store for non-overlay code and data.\n\
 564   --reserved-space=bytes      Local store for stack and heap.  If not specified\n\
 565                               ld will estimate stack size and assume no heap.\n\
 566   --extra-stack-space=bytes   Space for negative sp access (default 2000) if\n\
 567                               --reserved-space not given.\n"
 568                    ));
 569 '
 570
 571 PARSE_AND_LIST_ARGS_CASES='
 572     case OPTION_SPU_PLUGIN:
 573       spu_elf_plugin (1);
 574       break;
 575
 576     case OPTION_SPU_NO_OVERLAYS:
 577       no_overlays = 1;
 578       break;
 579
 580     case OPTION_SPU_STUB_SYMS:
 581       emit_stub_syms = 1;
 582       break;
 583
 584     case OPTION_SPU_NON_OVERLAY_STUBS:
 585       non_overlay_stubs = 1;
 586       break;
 587
 588     case OPTION_SPU_LOCAL_STORE:
 589       {
 590         char *end;
 591         local_store_lo = strtoul (optarg, &end, 0);
 592         if (*end == '\'':'\'')
 593           {
 594             local_store_hi = strtoul (end + 1, &end, 0);
 595             if (*end == 0)
 596               break;
 597           }
 598         einfo (_("%P%F: invalid --local-store address range `%s'\''\n"), optarg);
 599       }
 600       break;
 601
 602     case OPTION_SPU_STACK_ANALYSIS:
 603       stack_analysis = 1;
 604       break;
 605
 606     case OPTION_SPU_STACK_SYMS:
 607       emit_stack_syms = 1;
 608       break;
 609
 610     case OPTION_SPU_AUTO_OVERLAY:
 611       auto_overlay |= 1;
 612       if (optarg != NULL)
 613         {
 614           auto_overlay_file = optarg;
 615           break;
 616         }
 617       /* Fall thru */
 618
 619     case OPTION_SPU_AUTO_RELINK:
 620       auto_overlay |= 2;
 621       break;
 622
 623     case OPTION_SPU_OVERLAY_RODATA:
 624       auto_overlay |= 4;
 625       break;
 626
 627     case OPTION_SPU_FIXED_SPACE:
 628       {
 629         char *end;
 630         auto_overlay_fixed = strtoul (optarg, &end, 0);
 631         if (*end != 0)
 632           einfo (_("%P%F: invalid --fixed-space value `%s'\''\n"), optarg);
 633       }
 634       break;
 635
 636     case OPTION_SPU_RESERVED_SPACE:
 637       {
 638         char *end;
 639         auto_overlay_reserved = strtoul (optarg, &end, 0);
 640         if (*end != 0)
 641           einfo (_("%P%F: invalid --reserved-space value `%s'\''\n"), optarg);
 642       }
 643       break;
 644
 645     case OPTION_SPU_EXTRA_STACK:
 646       {
 647         char *end;
 648         extra_stack_space = strtol (optarg, &end, 0);
 649         if (*end != 0)
 650           einfo (_("%P%F: invalid --extra-stack-space value `%s'\''\n"), optarg);
 651       }
 652       break;
 653
 654     case OPTION_SPU_NO_AUTO_OVERLAY:
 655       auto_overlay = 0;
 656       if (optarg != NULL)
 657         {
 658           struct tflist *tf;
 659           size_t len;
 660
 661           if (tmp_file_list == NULL)
 662             atexit (clean_tmp);
 663
 664           len = strlen (optarg) + 1;
 665           tf = xmalloc (sizeof (*tf) - sizeof (tf->name) + len);
 666           memcpy (tf->name, optarg, len);
 667           tf->next = tmp_file_list;
 668           tmp_file_list = tf;
 669           break;
 670         }
 671       break;
 672 '
 673
 674 LDEMUL_AFTER_OPEN=spu_after_open
 675 LDEMUL_BEFORE_ALLOCATION=spu_before_allocation
 676 LDEMUL_FINISH=gld${EMULATION_NAME}_finish
 677 LDEMUL_CHOOSE_TARGET=gld${EMULATION_NAME}_choose_target