ld/emultempl/aix.em

   1 # This shell script emits a C file. -*- C -*-
   2 # It does some substitutions.
   3 if [ -z "$MACHINE" ]; then
   4   OUTPUT_ARCH=${ARCH}
   5 else
   6   OUTPUT_ARCH=${ARCH}:${MACHINE}
   7 fi
   8 cat >e${EMULATION_NAME}.c <<EOF
   9 /* This file is is generated by a shell script.  DO NOT EDIT! */
  10
  11 /* AIX emulation code for ${EMULATION_NAME}
  12    Copyright 1991, 1993, 1995, 1996, 1997, 1998, 2000, 2001
  13    Free Software Foundation, Inc.
  14    Written by Steve Chamberlain <sac@cygnus.com>
  15    AIX support by Ian Lance Taylor <ian@cygnus.com>
  16    AIX 64 bit support by Tom Rix <trix@redhat.com>
  17
  18 This file is part of GLD, the Gnu Linker.
  19
  20 This program is free software; you can redistribute it and/or modify
  21 it under the terms of the GNU General Public License as published by
  22 the Free Software Foundation; either version 2 of the License, or
  23 (at your option) any later version.
  24
  25 This program is distributed in the hope that it will be useful,
  26 but WITHOUT ANY WARRANTY; without even the implied warranty of
  27 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28 GNU General Public License for more details.
  29
  30 You should have received a copy of the GNU General Public License
  31 along with this program; if not, write to the Free Software
  32 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  33
  34 #define TARGET_IS_${EMULATION_NAME}
  35
  36 #include "bfd.h"
  37 #include "sysdep.h"
  38 #include "libiberty.h"
  39 #include "safe-ctype.h"
  40 #include "getopt.h"
  41 #include "obstack.h"
  42 #include "bfdlink.h"
  43
  44 #include "ld.h"
  45 #include "ldmain.h"
  46 #include "ldmisc.h"
  47 #include "ldexp.h"
  48 #include "ldlang.h"
  49 #include "ldfile.h"
  50 #include "ldemul.h"
  51 #include "ldctor.h"
  52 #include "ldgram.h"
  53
  54 #include "coff/internal.h"
  55 #include "coff/xcoff.h"
  56
  57 static void gld${EMULATION_NAME}_before_parse PARAMS ((void));
  58 static int gld${EMULATION_NAME}_parse_args PARAMS ((int, char **));
  59 static void gld${EMULATION_NAME}_after_open PARAMS ((void));
  60 static char *choose_target PARAMS ((int, char **));
  61 static void gld${EMULATION_NAME}_before_allocation PARAMS ((void));
  62 static void gld${EMULATION_NAME}_read_file PARAMS ((const char *, boolean));
  63 static void gld${EMULATION_NAME}_free PARAMS ((PTR));
  64 static void gld${EMULATION_NAME}_find_relocs
  65 PARAMS ((lang_statement_union_type *));
  66 static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *));
  67 static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
  68 static boolean gld${EMULATION_NAME}_unrecognized_file
  69   PARAMS ((lang_input_statement_type *));
  70 static void gld${EMULATION_NAME}_create_output_section_statements
  71   PARAMS((void));
  72 static int is_syscall PARAMS ((char *, unsigned int *));
  73 static int change_symbol_mode PARAMS ((char *));
  74
  75 /* The file alignment required for each section.  */
  76 static unsigned long file_align;
  77
  78 /* The maximum size the stack is permitted to grow.  This is stored in
  79    the a.out header.  */
  80 static unsigned long maxstack;
  81
  82 /* The maximum data size.  This is stored in the a.out header.  */
  83 static unsigned long maxdata;
  84
  85 /* Whether to perform garbage collection.  */
  86 static int gc = 1;
  87
  88 /* The module type to use.  */
  89 static unsigned short modtype = ('1' << 8) | 'L';
  90
  91 /* Whether the .text section must be read-only (i.e., no relocs
  92    permitted).  */
  93 static int textro;
  94
  95 /* Whether to implement Unix like linker semantics.  */
  96 static int unix_ld;
  97
  98 /* Structure used to hold import file list.  */
  99
 100 struct filelist
 101 {
 102   struct filelist *next;
 103   const char *name;
 104 };
 105
 106 /* List of import files.  */
 107 static struct filelist *import_files;
 108
 109 /* List of export symbols read from the export files.  */
 110
 111 struct export_symbol_list
 112 {
 113   struct export_symbol_list *next;
 114   const char *name;
 115 };
 116
 117 static struct export_symbol_list *export_symbols;
 118
 119 /* Maintains the 32 or 64 bit mode state of import file */
 120 static unsigned int symbol_mode = 0x04;
 121
 122 /* Which symbol modes are valid */
 123 static unsigned int symbol_mode_mask = 0x0d;
 124
 125 /* Whether this is a 64 bit link */
 126 static int is_64bit = 0;
 127
 128 /* Which syscalls from import file are valid */
 129 static unsigned int syscall_mask = 0x77;
 130
 131 /* fake file for -binitfini support */
 132 static lang_input_statement_type *initfini_file;
 133
 134 /* This routine is called before anything else is done.  */
 135
 136 static void
 137 gld${EMULATION_NAME}_before_parse ()
 138 {
 139 #ifndef TARGET_                 /* I.e., if not generic.  */
 140   const bfd_arch_info_type *arch = bfd_scan_arch ("${OUTPUT_ARCH}");
 141   if (arch)
 142     {
 143       ldfile_output_architecture = arch->arch;
 144       ldfile_output_machine = arch->mach;
 145       ldfile_output_machine_name = arch->printable_name;
 146     }
 147   else
 148     ldfile_output_architecture = bfd_arch_${ARCH};
 149 #endif /* not TARGET_ */
 150   config.has_shared = true;
 151
 152   /* The link_info.[init|fini]_functions are initialized in ld/lexsup.c.
 153      Override them here so we can use the link_info.init_function as a
 154      state flag that lets the backend know that -binitfini has been done.  */
 155
 156   link_info.init_function = NULL;
 157   link_info.fini_function = NULL;
 158
 159 }
 160
 161 /* Handle AIX specific options.  */
 162
 163 static int
 164 gld${EMULATION_NAME}_parse_args (argc, argv)
 165      int argc;
 166      char **argv;
 167 {
 168   int prevoptind = optind;
 169   int prevopterr = opterr;
 170   int indx;
 171   int longind;
 172   int optc;
 173   bfd_signed_vma val;
 174   char *end;
 175
 176   enum
 177   {
 178     OPTION_IGNORE = 300,
 179     OPTION_AUTOIMP,
 180     OPTION_ERNOTOK,
 181     OPTION_EROK,
 182     OPTION_EXPORT,
 183     OPTION_IMPORT,
 184     OPTION_INITFINI,
 185     OPTION_LOADMAP,
 186     OPTION_MAXDATA,
 187     OPTION_MAXSTACK,
 188     OPTION_MODTYPE,
 189     OPTION_NOAUTOIMP,
 190     OPTION_NOSTRCMPCT,
 191     OPTION_PD,
 192     OPTION_PT,
 193     OPTION_STRCMPCT,
 194     OPTION_UNIX,
 195     OPTION_32,
 196     OPTION_64,
 197   };
 198
 199   /* -binitfini has special handling in the linker backend.  The native linker
 200      uses the arguemnts to generate a table of init and fini functions for
 201      the executable.  The important use for this option is to support aix 4.2+
 202      c++ constructors and destructors.  This is tied into gcc via collect2.c.
 203
 204      The function table is accessed by the runtime linker/loader by checking if
 205      the first symbol in the loader symbol table is __rtinit.  The gnu linker
 206      generates this symbol and makes it the first loader symbol.  */
 207
 208   static const struct option longopts[] = {
 209     {"basis", no_argument, NULL, OPTION_IGNORE},
 210     {"bautoimp", no_argument, NULL, OPTION_AUTOIMP},
 211     {"bcomprld", no_argument, NULL, OPTION_IGNORE},
 212     {"bcrld", no_argument, NULL, OPTION_IGNORE},
 213     {"bcror31", no_argument, NULL, OPTION_IGNORE},
 214     {"bD", required_argument, NULL, OPTION_MAXDATA},
 215     {"bE", required_argument, NULL, OPTION_EXPORT},
 216     {"bernotok", no_argument, NULL, OPTION_ERNOTOK},
 217     {"berok", no_argument, NULL, OPTION_EROK},
 218     {"berrmsg", no_argument, NULL, OPTION_IGNORE},
 219     {"bexport", required_argument, NULL, OPTION_EXPORT},
 220     {"bf", no_argument, NULL, OPTION_ERNOTOK},
 221     {"bgc", no_argument, &gc, 1},
 222     {"bh", required_argument, NULL, OPTION_IGNORE},
 223     {"bhalt", required_argument, NULL, OPTION_IGNORE},
 224     {"bI", required_argument, NULL, OPTION_IMPORT},
 225     {"bimport", required_argument, NULL, OPTION_IMPORT},
 226     {"binitfini", required_argument, NULL, OPTION_INITFINI},
 227     {"bl", required_argument, NULL, OPTION_LOADMAP},
 228     {"bloadmap", required_argument, NULL, OPTION_LOADMAP},
 229     {"bmaxdata", required_argument, NULL, OPTION_MAXDATA},
 230     {"bmaxstack", required_argument, NULL, OPTION_MAXSTACK},
 231     {"bM", required_argument, NULL, OPTION_MODTYPE},
 232     {"bmodtype", required_argument, NULL, OPTION_MODTYPE},
 233     {"bnoautoimp", no_argument, NULL, OPTION_NOAUTOIMP},
 234     {"bnodelcsect", no_argument, NULL, OPTION_IGNORE},
 235     {"bnoentry", no_argument, NULL, OPTION_IGNORE},
 236     {"bnogc", no_argument, &gc, 0},
 237     {"bnso", no_argument, NULL, OPTION_NOAUTOIMP},
 238     {"bnostrcmpct", no_argument, NULL, OPTION_NOSTRCMPCT},
 239     {"bnotextro", no_argument, &textro, 0},
 240     {"bnro", no_argument, &textro, 0},
 241     {"bpD", required_argument, NULL, OPTION_PD},
 242     {"bpT", required_argument, NULL, OPTION_PT},
 243     {"bro", no_argument, &textro, 1},
 244     {"bS", required_argument, NULL, OPTION_MAXSTACK},
 245     {"bso", no_argument, NULL, OPTION_AUTOIMP},
 246     {"bstrcmpct", no_argument, NULL, OPTION_STRCMPCT},
 247     {"btextro", no_argument, &textro, 1},
 248     {"b32", no_argument, NULL, OPTION_32},
 249     {"b64", no_argument, NULL, OPTION_64},
 250     {"static", no_argument, NULL, OPTION_NOAUTOIMP},
 251     {"unix", no_argument, NULL, OPTION_UNIX},
 252     {NULL, no_argument, NULL, 0}
 253   };
 254
 255   /* Options supported by the AIX linker which we do not support: -f,
 256      -S, -v, -Z, -bbindcmds, -bbinder, -bbindopts, -bcalls, -bcaps,
 257      -bcror15, -bdebugopt, -bdbg, -bdelcsect, -bex?, -bfilelist, -bfl,
 258      -bgcbypass, -bglink, -binsert, -bi, -bloadmap, -bl, -bmap, -bnl,
 259      -bnobind, -bnocomprld, -bnocrld, -bnoerrmsg, -bnoglink,
 260      -bnoloadmap, -bnl, -bnoobjreorder, -bnoquiet, -bnoreorder,
 261      -bnotypchk, -bnox, -bquiet, -bR, -brename, -breorder, -btypchk,
 262      -bx, -bX, -bxref.  */
 263
 264   /* If the current option starts with -b, change the first : to an =.
 265      The AIX linker uses : to separate the option from the argument;
 266      changing it to = lets us treat it as a getopt option.  */
 267   indx = optind;
 268   if (indx == 0)
 269     indx = 1;
 270
 271   if (indx < argc && strncmp (argv[indx], "-b", 2) == 0)
 272     {
 273       char *s;
 274
 275       for (s = argv[indx]; *s != '\0'; s++)
 276         {
 277           if (*s == ':')
 278             {
 279               *s = '=';
 280               break;
 281             }
 282         }
 283     }
 284
 285
 286   /* We add s and u so to the short options list so that -s and -u on
 287      the command line do not match -static and -unix.  */
 288
 289   opterr = 0;
 290   optc = getopt_long_only (argc, argv, "-D:H:KT:zsu", longopts, &longind);
 291   opterr = prevopterr;
 292
 293   switch (optc)
 294     {
 295     case 's':
 296     case 'u':
 297     default:
 298       optind = prevoptind;
 299       return 0;
 300
 301     case 0:
 302       /* Long option which just sets a flag.  */
 303       break;
 304
 305     case 'D':
 306       val = strtoll (optarg, &end, 0);
 307       if (*end != '\0')
 308         einfo ("%P: warning: ignoring invalid -D number %s\n", optarg);
 309       else if (val != -1)
 310         lang_section_start (".data", exp_intop (val));
 311       break;
 312
 313     case 'H':
 314       val = strtoul (optarg, &end, 0);
 315       if (*end != '\0' || (val & (val - 1)) != 0)
 316         einfo ("%P: warning: ignoring invalid -H number %s\n", optarg);
 317       else
 318         file_align = val;
 319       break;
 320
 321     case 'K':
 322     case 'z':
 323       /* FIXME: This should use the page size for the target system.  */
 324       file_align = 4096;
 325       break;
 326
 327     case 'T':
 328       /* On AIX this is the same as GNU ld -Ttext.  When we see -T
 329          number, we assume the AIX option is intended.  Otherwise, we
 330          assume the usual GNU ld -T option is intended.  We can't just
 331          ignore the AIX option, because gcc passes it to the linker.  */
 332       val = strtoull (optarg, &end, 0);
 333       if (*end != '\0')
 334         {
 335           optind = prevoptind;
 336           return 0;
 337         }
 338       lang_section_start (".text", exp_intop (val));
 339       break;
 340
 341     case OPTION_IGNORE:
 342       break;
 343
 344     case OPTION_INITFINI:
 345       {
 346         /*
 347          * The aix linker init fini has the format :
 348          *
 349          * -binitfini:[ Initial][:Termination][:Priority]
 350          *
 351          * it allows the Termination and Priority to be optional.
 352          *
 353          * Since we support only one init/fini pair, we ignore the Priority.
 354          *
 355          * Define the special symbol __rtinit.
 356          *
 357          * strtok does not correctly handle the case of -binitfini::fini: so
 358          * do it by hand
 359          */
 360         char *t, *i, *f;
 361
 362         i = t = optarg;
 363         while (*t && ':' != *t)
 364           t++;
 365         if (*t)
 366           *t++ = 0;
 367
 368         if (0 != strlen (i))
 369           link_info.init_function = i;
 370
 371         f = t;
 372         while (*t && ':' != *t)
 373           t++;
 374         *t = 0;
 375
 376         if (0 != strlen (f))
 377           link_info.fini_function = f;
 378       }
 379       break;
 380
 381     case OPTION_AUTOIMP:
 382       link_info.static_link = false;
 383       break;
 384
 385     case OPTION_ERNOTOK:
 386       force_make_executable = false;
 387       break;
 388
 389     case OPTION_EROK:
 390       force_make_executable = true;
 391       break;
 392
 393     case OPTION_EXPORT:
 394       gld${EMULATION_NAME}_read_file (optarg, false);
 395       break;
 396
 397     case OPTION_IMPORT:
 398       {
 399         struct filelist *n;
 400         struct filelist **flpp;
 401
 402         n = (struct filelist *) xmalloc (sizeof (struct filelist));
 403         n->next = NULL;
 404         n->name = optarg;
 405         flpp = &import_files;
 406         while (*flpp != NULL)
 407           flpp = &(*flpp)->next;
 408         *flpp = n;
 409       }
 410       break;
 411
 412     case OPTION_LOADMAP:
 413       config.map_filename = optarg;
 414       break;
 415
 416     case OPTION_MAXDATA:
 417       val = strtoull (optarg, &end, 0);
 418       if (*end != '\0')
 419         einfo ("%P: warning: ignoring invalid -bmaxdata number %s\n", optarg);
 420       else
 421         maxdata = val;
 422       break;
 423
 424     case OPTION_MAXSTACK:
 425       val = strtoull (optarg, &end, 0);
 426       if (*end != '\0')
 427         einfo ("%P: warning: ignoring invalid -bmaxstack number %s\n",
 428                optarg);
 429       else
 430         maxstack = val;
 431       break;
 432
 433     case OPTION_MODTYPE:
 434       if (*optarg == 'S')
 435         {
 436           link_info.shared = true;
 437           ++optarg;
 438         }
 439       if (*optarg == '\0' || optarg[1] == '\0')
 440         einfo ("%P: warning: ignoring invalid module type %s\n", optarg);
 441       else
 442         modtype = (*optarg << 8) | optarg[1];
 443       break;
 444
 445     case OPTION_NOAUTOIMP:
 446       link_info.static_link = true;
 447       break;
 448
 449     case OPTION_NOSTRCMPCT:
 450       link_info.traditional_format = true;
 451       break;
 452
 453     case OPTION_PD:
 454       /* This sets the page that the .data section is supposed to
 455          start on.  The offset within the page should still be the
 456          offset within the file, so we need to build an appropriate
 457          expression.  */
 458       val = strtoull (optarg, &end, 0);
 459       if (*end != '\0')
 460         einfo ("%P: warning: ignoring invalid -pD number %s\n", optarg);
 461       else
 462         {
 463           etree_type *t;
 464
 465           t = exp_binop ('+',
 466                          exp_intop (val),
 467                          exp_binop ('&',
 468                                     exp_nameop (NAME, "."),
 469                                     exp_intop (0xfff)));
 470           t = exp_binop ('&',
 471                          exp_binop ('+', t, exp_intop (31)),
 472                          exp_intop (~(bfd_vma) 31));
 473           lang_section_start (".data", t);
 474         }
 475       break;
 476
 477     case OPTION_PT:
 478       /* This set the page that the .text section is supposed to start
 479          on.  The offset within the page should still be the offset
 480          within the file.  */
 481       val = strtoull (optarg, &end, 0);
 482       if (*end != '\0')
 483         einfo ("%P: warning: ignoring invalid -pT number %s\n", optarg);
 484       else
 485         {
 486           etree_type *t;
 487
 488           t = exp_binop ('+',
 489                          exp_intop (val),
 490                          exp_nameop (SIZEOF_HEADERS, NULL));
 491           t = exp_binop ('&',
 492                          exp_binop ('+', t, exp_intop (31)),
 493                          exp_intop (~(bfd_vma) 31));
 494           lang_section_start (".text", t);
 495         }
 496       break;
 497
 498     case OPTION_STRCMPCT:
 499       link_info.traditional_format = false;
 500       break;
 501
 502     case OPTION_UNIX:
 503       unix_ld = true;
 504       break;
 505
 506     case OPTION_32:
 507       is_64bit = 0;
 508       syscall_mask = 0x77;
 509       symbol_mode_mask = 0x0d;
 510       break;
 511
 512     case OPTION_64:
 513       is_64bit = 1;
 514       syscall_mask = 0xcc;
 515       symbol_mode_mask = 0x0e;
 516       break;
 517
 518     }
 519
 520   return 1;
 521 }
 522
 523 /* This is called when an input file can not be recognized as a BFD
 524    object or an archive.  If the file starts with #!, we must treat it
 525    as an import file.  This is for AIX compatibility.  */
 526
 527 static boolean
 528 gld${EMULATION_NAME}_unrecognized_file (entry)
 529      lang_input_statement_type *entry;
 530 {
 531   FILE *e;
 532   boolean ret;
 533
 534   e = fopen (entry->filename, FOPEN_RT);
 535   if (e == NULL)
 536     return false;
 537
 538   ret = false;
 539
 540   if (getc (e) == '#' && getc (e) == '!')
 541     {
 542       struct filelist *n;
 543       struct filelist **flpp;
 544
 545       n = (struct filelist *) xmalloc (sizeof (struct filelist));
 546       n->next = NULL;
 547       n->name = entry->filename;
 548       flpp = &import_files;
 549       while (*flpp != NULL)
 550         flpp = &(*flpp)->next;
 551       *flpp = n;
 552
 553       ret = true;
 554       entry->loaded = true;
 555     }
 556
 557   fclose (e);
 558
 559   return ret;
 560 }
 561
 562 /* This is called after the input files have been opened.  */
 563
 564 static void
 565 gld${EMULATION_NAME}_after_open ()
 566 {
 567   boolean r;
 568   struct set_info *p;
 569
 570   /* Call ldctor_build_sets, after pretending that this is a
 571      relocateable link.  We do this because AIX requires relocation
 572      entries for all references to symbols, even in a final
 573      executable.  Of course, we only want to do this if we are
 574      producing an XCOFF output file.  */
 575   r = link_info.relocateable;
 576   if (strstr (bfd_get_target (output_bfd), "xcoff") != NULL)
 577     link_info.relocateable = true;
 578   ldctor_build_sets ();
 579   link_info.relocateable = r;
 580
 581   /* For each set, record the size, so that the XCOFF backend can
 582      output the correct csect length.  */
 583   for (p = sets; p != (struct set_info *) NULL; p = p->next)
 584     {
 585       bfd_size_type size;
 586
 587       /* If the symbol is defined, we may have been invoked from
 588          collect, and the sets may already have been built, so we do
 589          not do anything.  */
 590       if (p->h->type == bfd_link_hash_defined
 591           || p->h->type == bfd_link_hash_defweak)
 592         continue;
 593
 594       if (p->reloc != BFD_RELOC_CTOR)
 595         {
 596           /* Handle this if we need to.  */
 597           abort ();
 598         }
 599
 600       size = (p->count + 2) * 4;
 601       if (!bfd_xcoff_link_record_set (output_bfd, &link_info, p->h, size))
 602         einfo ("%F%P: bfd_xcoff_link_record_set failed: %E\n");
 603     }
 604 }
 605
 606 /* This is called after the sections have been attached to output
 607    sections, but before any sizes or addresses have been set.  */
 608
 609 static void
 610 gld${EMULATION_NAME}_before_allocation ()
 611 {
 612   struct filelist *fl;
 613   struct export_symbol_list *el;
 614   char *libpath;
 615   asection *special_sections[XCOFF_NUMBER_OF_SPECIAL_SECTIONS];
 616   int i;
 617
 618   /* Handle the import and export files, if any.  */
 619   for (fl = import_files; fl != NULL; fl = fl->next)
 620     gld${EMULATION_NAME}_read_file (fl->name, true);
 621   for (el = export_symbols; el != NULL; el = el->next)
 622     {
 623       struct bfd_link_hash_entry *h;
 624
 625       h = bfd_link_hash_lookup (link_info.hash, el->name, false, false, false);
 626       if (h == NULL)
 627         einfo ("%P%F: bfd_link_hash_lookup of export symbol failed: %E\n");
 628       if (!bfd_xcoff_export_symbol (output_bfd, &link_info, h))
 629         einfo ("%P%F: bfd_xcoff_export_symbol failed: %E\n");
 630     }
 631
 632   /* Track down all relocations called for by the linker script (these
 633      are typically constructor/destructor entries created by
 634      CONSTRUCTORS) and let the backend know it will need to create
 635      .loader relocs for them.  */
 636   lang_for_each_statement (gld${EMULATION_NAME}_find_relocs);
 637
 638   /* We need to build LIBPATH from the -L arguments.  If any -rpath
 639      arguments were used, though, we use -rpath instead, as a GNU
 640      extension.  */
 641   if (command_line.rpath != NULL)
 642     libpath = command_line.rpath;
 643   else if (search_head == NULL)
 644     libpath = (char *) "";
 645   else
 646     {
 647       size_t len;
 648       search_dirs_type *search;
 649
 650       len = strlen (search_head->name);
 651       libpath = xmalloc (len + 1);
 652       strcpy (libpath, search_head->name);
 653       for (search = search_head->next; search != NULL; search = search->next)
 654         {
 655           size_t nlen;
 656
 657           nlen = strlen (search->name);
 658           libpath = xrealloc (libpath, len + nlen + 2);
 659           libpath[len] = ':';
 660           strcpy (libpath + len + 1, search->name);
 661           len += nlen + 1;
 662         }
 663     }
 664
 665   /* Let the XCOFF backend set up the .loader section.  */
 666   if (!bfd_xcoff_size_dynamic_sections (output_bfd, &link_info, libpath,
 667                                         entry_symbol, file_align,
 668                                         maxstack, maxdata,
 669                                         gc && !unix_ld ? true : false,
 670                                         modtype,
 671                                         textro ? true : false,
 672                                         unix_ld, special_sections))
 673     einfo ("%P%F: failed to set dynamic section sizes: %E\n");
 674
 675   /* Look through the special sections, and put them in the right
 676      place in the link ordering.  This is especially magic.  */
 677   for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++)
 678     {
 679       asection *sec;
 680       lang_output_section_statement_type *os;
 681       lang_statement_union_type **pls;
 682       lang_input_section_type *is;
 683       const char *oname;
 684       boolean start;
 685
 686       sec = special_sections[i];
 687       if (sec == NULL)
 688         continue;
 689
 690       /* Remove this section from the list of the output section.
 691          This assumes we know what the script looks like.  */
 692       is = NULL;
 693       os = lang_output_section_find (sec->output_section->name);
 694       if (os == NULL)
 695         einfo ("%P%F: can't find output section %s\n",
 696                sec->output_section->name);
 697
 698       for (pls = &os->children.head; *pls != NULL; pls = &(*pls)->header.next)
 699         {
 700           if ((*pls)->header.type == lang_input_section_enum
 701               && (*pls)->input_section.section == sec)
 702             {
 703               is = (lang_input_section_type *) * pls;
 704               *pls = (*pls)->header.next;
 705               break;
 706             }
 707
 708           if ((*pls)->header.type == lang_wild_statement_enum)
 709             {
 710               lang_statement_union_type **pwls;
 711
 712               for (pwls = &(*pls)->wild_statement.children.head;
 713                    *pwls != NULL; pwls = &(*pwls)->header.next)
 714                 {
 715
 716                   if ((*pwls)->header.type == lang_input_section_enum
 717                       && (*pwls)->input_section.section == sec)
 718                     {
 719                       is = (lang_input_section_type *) * pwls;
 720                       *pwls = (*pwls)->header.next;
 721                       break;
 722                     }
 723                 }
 724
 725               if (is != NULL)
 726                 break;
 727             }
 728         }
 729
 730       if (is == NULL)
 731         {
 732           einfo ("%P%F: can't find %s in output section\n",
 733                  bfd_get_section_name (sec->owner, sec));
 734         }
 735
 736       /* Now figure out where the section should go.  */
 737       switch (i)
 738         {
 739
 740         default:                /* to avoid warnings */
 741         case XCOFF_SPECIAL_SECTION_TEXT:
 742           /* _text */
 743           oname = ".text";
 744           start = true;
 745           break;
 746
 747         case XCOFF_SPECIAL_SECTION_ETEXT:
 748           /* _etext */
 749           oname = ".text";
 750           start = false;
 751           break;
 752
 753         case XCOFF_SPECIAL_SECTION_DATA:
 754           /* _data */
 755           oname = ".data";
 756           start = true;
 757           break;
 758
 759         case XCOFF_SPECIAL_SECTION_EDATA:
 760           /* _edata */
 761           oname = ".data";
 762           start = false;
 763           break;
 764
 765         case XCOFF_SPECIAL_SECTION_END:
 766         case XCOFF_SPECIAL_SECTION_END2:
 767           /* _end and end */
 768           oname = ".bss";
 769           start = false;
 770           break;
 771         }
 772
 773       os = lang_output_section_find (oname);
 774
 775       if (start)
 776         {
 777           is->header.next = os->children.head;
 778           os->children.head = (lang_statement_union_type *) is;
 779         }
 780       else
 781         {
 782           is->header.next = NULL;
 783           lang_statement_append (&os->children,
 784                                  (lang_statement_union_type *) is,
 785                                  &is->header.next);
 786         }
 787     }
 788 }
 789
 790 static char *
 791 choose_target (argc, argv)
 792      int argc;
 793      char **argv;
 794 {
 795   int i, j, jmax;
 796   static char *from_outside;
 797   static char *from_inside;
 798   static char *argv_to_target[][2] = {
 799     {NULL,   "${OUTPUT_FORMAT}"},
 800     {"-b32", "aixcoff-rs6000"},
 801     {"-b64", "aixcoff64-rs6000"},
 802   };
 803
 804   jmax = 3;
 805
 806   from_outside = getenv (TARGET_ENVIRON);
 807   if (from_outside != (char *) NULL)
 808     return from_outside;
 809
 810   /* Set to default. */
 811   from_inside = argv_to_target[0][1];
 812   for (i = 1; i < argc; i++)
 813     {
 814       for (j = 1; j < jmax; j++)
 815         {
 816           if (0 == strcmp (argv[i], argv_to_target[j][0]))
 817             from_inside = argv_to_target[j][1];
 818         }
 819     }
 820
 821   return from_inside;
 822 }
 823
 824 /* Returns
 825    1 : state changed
 826    0 : no change */
 827 static int
 828 change_symbol_mode (input)
 829      char *input;
 830 {
 831   char *symbol_mode_string[] = {
 832     "# 32",                     /* 0x01 */
 833     "# 64",                     /* 0x02 */
 834     "# no32",                   /* 0x04 */
 835     "# no64",                   /* 0x08 */
 836     NULL,
 837   };
 838
 839   unsigned int bit;
 840   char *string;
 841
 842   for (bit = 0;; bit++)
 843     {
 844       string = symbol_mode_string[bit];
 845       if (string == NULL)
 846         return 0;
 847
 848       if (0 == strcmp (input, string))
 849         {
 850           symbol_mode = (1 << bit);
 851           return 1;
 852         }
 853     }
 854   /* should not be here */
 855   return 0;
 856 }
 857
 858 /* Returns
 859    1 : yes
 860    0 : ignore
 861    -1 : error, try something else */
 862 static int
 863 is_syscall (input, flag)
 864      char *input;
 865      unsigned int *flag;
 866 {
 867   unsigned int bit;
 868   char *string;
 869
 870   struct sc {
 871     char *syscall_string;
 872     unsigned int flag;
 873   } s [] = {
 874     { "svc"         /* 0x01 */, XCOFF_SYSCALL32 },
 875     { "svc32"       /* 0x02 */, XCOFF_SYSCALL32 },
 876     { "svc3264"     /* 0x04 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 },
 877     { "svc64"       /* 0x08 */, XCOFF_SYSCALL64 },
 878     { "syscall"     /* 0x10 */, XCOFF_SYSCALL32 },
 879     { "syscall32"   /* 0x20 */, XCOFF_SYSCALL32 },
 880     { "syscall3264" /* 0x40 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 },
 881     { "syscall64"   /* 0x80 */, XCOFF_SYSCALL64 },
 882     { NULL, 0 },
 883   };
 884
 885   *flag = 0;
 886
 887   for (bit = 0;; bit++)
 888     {
 889       string = s[bit].syscall_string;
 890       if (string == NULL)
 891         return -1;
 892
 893       if (0 == strcmp (input, string))
 894         {
 895           if (1 << bit & syscall_mask)
 896             {
 897               *flag = s[bit].flag;
 898               return 1;
 899             }
 900           else
 901             {
 902               return 0;
 903             }
 904         }
 905     }
 906   /* should not be here */
 907   return -1;
 908 }
 909
 910 /* Read an import or export file.  For an import file, this is called
 911    by the before_allocation emulation routine.  For an export file,
 912    this is called by the parse_args emulation routine.  */
 913
 914 static void
 915 gld${EMULATION_NAME}_read_file (filename, import)
 916      const char *filename;
 917      boolean import;
 918 {
 919   struct obstack *o;
 920   FILE *f;
 921   int lineno;
 922   int c;
 923   boolean keep;
 924   const char *imppath;
 925   const char *impfile;
 926   const char *impmember;
 927
 928   o = (struct obstack *) xmalloc (sizeof (struct obstack));
 929   obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free);
 930
 931   f = fopen (filename, FOPEN_RT);
 932   if (f == NULL)
 933     {
 934       bfd_set_error (bfd_error_system_call);
 935       einfo ("%F%s: %E\n", filename);
 936     }
 937
 938   keep = false;
 939
 940   imppath = NULL;
 941   impfile = NULL;
 942   impmember = NULL;
 943
 944   lineno = 0;
 945
 946   /*
 947    * default to 32 and 64 bit mode
 948    * symbols at top of /lib/syscalls.exp do not have a mode modifier and they
 949    * are not repeated, assume 64 bit routines also want to use them.
 950    * See the routine change_symbol_mode for more information.
 951    */
 952   symbol_mode = 0x04;
 953
 954   while ((c = getc (f)) != EOF)
 955     {
 956       char *s;
 957       char *symname;
 958       unsigned int syscall_flag = 0;
 959       bfd_vma address;
 960       struct bfd_link_hash_entry *h;
 961
 962       if (c != '\n')
 963         {
 964           obstack_1grow (o, c);
 965           continue;
 966         }
 967
 968       obstack_1grow (o, '\0');
 969       ++lineno;
 970
 971       s = (char *) obstack_base (o);
 972       while (ISSPACE (*s))
 973         ++s;
 974       if (*s == '\0'
 975           || *s == '*'
 976           || change_symbol_mode (s)
 977           || (*s == '#' && s[1] == ' ')
 978           || (!import && *s == '#' && s[1] == '!'))
 979         {
 980           obstack_free (o, obstack_base (o));
 981           continue;
 982         }
 983
 984       if (*s == '#' && s[1] == '!')
 985         {
 986           s += 2;
 987           while (ISSPACE (*s))
 988             ++s;
 989           if (*s == '\0')
 990             {
 991               imppath = NULL;
 992               impfile = NULL;
 993               impmember = NULL;
 994               obstack_free (o, obstack_base (o));
 995             }
 996           else if (*s == '(')
 997             einfo ("%F%s%d: #! ([member]) is not supported in import files\n",
 998                    filename, lineno);
 999           else
1000             {
1001               char cs;
1002               char *file;
1003
1004               (void) obstack_finish (o);
1005               keep = true;
1006               imppath = s;
1007               file = NULL;
1008               while (!ISSPACE (*s) && *s != '(' && *s != '\0')
1009                 {
1010                   if (*s == '/')
1011                     file = s + 1;
1012                   ++s;
1013                 }
1014               if (file != NULL)
1015                 {
1016                   file[-1] = '\0';
1017                   impfile = file;
1018                   if (imppath == file - 1)
1019                     imppath = "/";
1020                 }
1021               else
1022                 {
1023                   impfile = imppath;
1024                   imppath = "";
1025                 }
1026               cs = *s;
1027               *s = '\0';
1028               while (ISSPACE (cs))
1029                 {
1030                   ++s;
1031                   cs = *s;
1032                 }
1033               if (cs != '(')
1034                 {
1035                   impmember = "";
1036                   if (cs != '\0')
1037                     einfo ("%s:%d: warning: syntax error in import file\n",
1038                            filename, lineno);
1039                 }
1040               else
1041                 {
1042                   ++s;
1043                   impmember = s;
1044                   while (*s != ')' && *s != '\0')
1045                     ++s;
1046                   if (*s == ')')
1047                     *s = '\0';
1048                   else
1049                     einfo ("%s:%d: warning: syntax error in import file\n",
1050                            filename, lineno);
1051                 }
1052             }
1053
1054           continue;
1055         }
1056
1057       if (symbol_mode & symbol_mode_mask)
1058         {
1059           /* This is a symbol to be imported or exported.  */
1060           symname = s;
1061           syscall_flag = 0;
1062           address = (bfd_vma) -1;
1063
1064           while (!ISSPACE (*s) && *s != '\0')
1065             ++s;
1066           if (*s != '\0')
1067             {
1068               char *se;
1069
1070               *s++ = '\0';
1071
1072               while (ISSPACE (*s))
1073                 ++s;
1074
1075               se = s;
1076               while (!ISSPACE (*se) && *se != '\0')
1077                 ++se;
1078               if (*se != '\0')
1079                 {
1080                   *se++ = '\0';
1081                   while (ISSPACE (*se))
1082                     ++se;
1083                   if (*se != '\0')
1084                     einfo ("%s%d: warning: syntax error in import/export file\n",
1085                            filename, lineno);
1086                 }
1087
1088               if (s != se)
1089                 {
1090                   int status;
1091                   char *end;
1092
1093                   status = is_syscall (s, &syscall_flag);
1094
1095                   if (0 > status)
1096                     {
1097                       /* not a system call, check for address */
1098                       address = strtoul (s, &end, 0);
1099                       if (*end != '\0')
1100                         {
1101                           einfo ("%s:%d: warning: syntax error in import/export file\n",
1102                                  filename, lineno);
1103
1104                         }
1105                     }
1106                 }
1107             }
1108
1109           if (!import)
1110             {
1111               struct export_symbol_list *n;
1112
1113               ldlang_add_undef (symname);
1114               n = ((struct export_symbol_list *)
1115                    xmalloc (sizeof (struct export_symbol_list)));
1116               n->next = export_symbols;
1117               n->name = xstrdup (symname);
1118               export_symbols = n;
1119             }
1120           else
1121             {
1122               h = bfd_link_hash_lookup (link_info.hash, symname, false, false,
1123                                         true);
1124               if (h == NULL || h->type == bfd_link_hash_new)
1125                 {
1126                   /* We can just ignore attempts to import an unreferenced
1127                      symbol.  */
1128                 }
1129               else
1130                 {
1131                   if (!bfd_xcoff_import_symbol (output_bfd, &link_info, h,
1132                                                 address, imppath, impfile,
1133                                                 impmember, syscall_flag))
1134                     einfo ("%X%s:%d: failed to import symbol %s: %E\n",
1135                            filename, lineno, symname);
1136                 }
1137             }
1138         }
1139       obstack_free (o, obstack_base (o));
1140     }
1141
1142   if (obstack_object_size (o) > 0)
1143     {
1144       einfo ("%s:%d: warning: ignoring unterminated last line\n",
1145              filename, lineno);
1146       obstack_free (o, obstack_base (o));
1147     }
1148
1149   if (!keep)
1150     {
1151       obstack_free (o, NULL);
1152       free (o);
1153     }
1154 }
1155
1156 /* This routine saves us from worrying about declaring free.  */
1157
1158 static void
1159 gld${EMULATION_NAME}_free (p)
1160      PTR p;
1161 {
1162   free (p);
1163 }
1164
1165 /* This is called by the before_allocation routine via
1166    lang_for_each_statement.  It looks for relocations and assignments
1167    to symbols.  */
1168
1169 static void
1170 gld${EMULATION_NAME}_find_relocs (s)
1171      lang_statement_union_type *s;
1172 {
1173   if (s->header.type == lang_reloc_statement_enum)
1174     {
1175       lang_reloc_statement_type *rs;
1176
1177       rs = &s->reloc_statement;
1178       if (rs->name == NULL)
1179         einfo ("%F%P: only relocations against symbols are permitted\n");
1180       if (!bfd_xcoff_link_count_reloc (output_bfd, &link_info, rs->name))
1181         einfo ("%F%P: bfd_xcoff_link_count_reloc failed: %E\n");
1182     }
1183
1184   if (s->header.type == lang_assignment_statement_enum)
1185     gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1186 }
1187
1188 /* Look through an expression for an assignment statement.  */
1189
1190 static void
1191 gld${EMULATION_NAME}_find_exp_assignment (exp)
1192      etree_type *exp;
1193 {
1194   struct bfd_link_hash_entry *h;
1195
1196   switch (exp->type.node_class)
1197     {
1198     case etree_provide:
1199       h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
1200                                 false, false, false);
1201       if (h == NULL)
1202         break;
1203       /* Fall through.  */
1204     case etree_assign:
1205       if (strcmp (exp->assign.dst, ".") != 0)
1206         {
1207           if (!bfd_xcoff_record_link_assignment (output_bfd, &link_info,
1208                                                  exp->assign.dst))
1209             einfo ("%P%F: failed to record assignment to %s: %E\n",
1210                    exp->assign.dst);
1211         }
1212       gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1213       break;
1214
1215     case etree_binary:
1216       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1217       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1218       break;
1219
1220     case etree_trinary:
1221       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1222       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1223       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1224       break;
1225
1226     case etree_unary:
1227       gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1228       break;
1229
1230     default:
1231       break;
1232     }
1233 }
1234
1235 static char *
1236 gld${EMULATION_NAME}_get_script (isfile)
1237      int *isfile;
1238 EOF
1239
1240 if test -n "$COMPILE_IN"
1241 then
1242 # Scripts compiled in.
1243
1244 # sed commands to quote an ld script as a C string.
1245 sc="-f ${srcdir}/emultempl/ostring.sed"
1246
1247 cat >>e${EMULATION_NAME}.c <<EOF
1248 {
1249   *isfile = 0;
1250
1251   if (link_info.relocateable == true && config.build_constructors == true)
1252     return
1253 EOF
1254 sed $sc ldscripts/${EMULATION_NAME}.xu                     >> e${EMULATION_NAME}.c
1255 echo '  ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c
1256 sed $sc ldscripts/${EMULATION_NAME}.xr                     >> e${EMULATION_NAME}.c
1257 echo '  ; else if (!config.text_read_only) return'         >> e${EMULATION_NAME}.c
1258 sed $sc ldscripts/${EMULATION_NAME}.xbn                    >> e${EMULATION_NAME}.c
1259 echo '  ; else if (!config.magic_demand_paged) return'     >> e${EMULATION_NAME}.c
1260 sed $sc ldscripts/${EMULATION_NAME}.xn                     >> e${EMULATION_NAME}.c
1261 echo '  ; else return'                                     >> e${EMULATION_NAME}.c
1262 sed $sc ldscripts/${EMULATION_NAME}.x                      >> e${EMULATION_NAME}.c
1263 echo '; }'                                                 >> e${EMULATION_NAME}.c
1264
1265 else
1266 # Scripts read from the filesystem.
1267
1268 cat >>e${EMULATION_NAME}.c <<EOF
1269 {
1270   *isfile = 1;
1271
1272   if (link_info.relocateable == true && config.build_constructors == true)
1273     return "ldscripts/${EMULATION_NAME}.xu";
1274   else if (link_info.relocateable == true)
1275     return "ldscripts/${EMULATION_NAME}.xr";
1276   else if (!config.text_read_only)
1277     return "ldscripts/${EMULATION_NAME}.xbn";
1278   else if (!config.magic_demand_paged)
1279     return "ldscripts/${EMULATION_NAME}.xn";
1280   else
1281     return "ldscripts/${EMULATION_NAME}.x";
1282 }
1283 EOF
1284
1285 fi
1286
1287 cat >>e${EMULATION_NAME}.c <<EOF
1288
1289 static void
1290 gld${EMULATION_NAME}_create_output_section_statements()
1291 {
1292   /* __rtinit */
1293   if ((bfd_get_flavour (output_bfd) == bfd_target_xcoff_flavour)
1294       && (link_info.init_function != NULL  || link_info.fini_function != NULL))
1295     {
1296
1297       initfini_file = lang_add_input_file ("initfini",
1298                                            lang_input_file_is_file_enum,
1299                                            NULL);
1300
1301       initfini_file->the_bfd = bfd_create ("initfini", output_bfd);
1302       if (initfini_file->the_bfd == NULL
1303           || ! bfd_set_arch_mach (initfini_file->the_bfd,
1304                                   bfd_get_arch (output_bfd),
1305                                   bfd_get_mach (output_bfd)))
1306         {
1307           einfo ("%X%P: can not create BFD %E\n");
1308           return;
1309         }
1310
1311       /* Call backend to fill in the rest */
1312       if (false == bfd_xcoff_link_generate_rtinit (initfini_file->the_bfd,
1313                                                    link_info.init_function,
1314                                                    link_info.fini_function))
1315         {
1316           einfo ("%X%P: can not create BFD %E\n");
1317           return;
1318         }
1319     }
1320 }
1321
1322 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = {
1323   gld${EMULATION_NAME}_before_parse,
1324   syslib_default,
1325   hll_default,
1326   after_parse_default,
1327   gld${EMULATION_NAME}_after_open,
1328   after_allocation_default,
1329   set_output_arch_default,
1330   choose_target,
1331   gld${EMULATION_NAME}_before_allocation,
1332   gld${EMULATION_NAME}_get_script,
1333   "${EMULATION_NAME}",
1334   "${OUTPUT_FORMAT}",
1335   0,                            /* finish */
1336   gld${EMULATION_NAME}_create_output_section_statements,
1337   0,                            /* open_dynamic_archive */
1338   0,                            /* place_orphan */
1339   0,                            /* set_symbols */
1340   gld${EMULATION_NAME}_parse_args,
1341   gld${EMULATION_NAME}_unrecognized_file,
1342   NULL,                         /* list_options */
1343   NULL,                         /* recognized_file */
1344   NULL,                         /* find potential_libraries */
1345 };
1346 EOF