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 ${EMULATION_NAME}
  12    Copyright 1991, 1993, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003
  13    Free Software Foundation, Inc.
  14    Written by Steve Chamberlain <sac@cygnus.com>
  15    AIX support by Ian Lance Taylor <ian@cygnus.com>
  16    AIX 64 bit support by Tom Rix <trix@redhat.com>
  17
  18 This file is part of GLD, the Gnu Linker.
  19
  20 This program is free software; you can redistribute it and/or modify
  21 it under the terms of the GNU General Public License as published by
  22 the Free Software Foundation; either version 2 of the License, or
  23 (at your option) any later version.
  24
  25 This program is distributed in the hope that it will be useful,
  26 but WITHOUT ANY WARRANTY; without even the implied warranty of
  27 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28 GNU General Public License for more details.
  29
  30 You should have received a copy of the GNU General Public License
  31 along with this program; if not, write to the Free Software
  32 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  33
  34 #define TARGET_IS_${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 #include "libcoff.h"
  57 #include "libxcoff.h"
  58
  59 static void gld${EMULATION_NAME}_read_file (const char *, bfd_boolean);
  60 static void gld${EMULATION_NAME}_free (void *);
  61 static void gld${EMULATION_NAME}_find_relocs (lang_statement_union_type *);
  62 static void gld${EMULATION_NAME}_find_exp_assignment (etree_type *);
  63
  64
  65 /* The file alignment required for each section.  */
  66 static unsigned long file_align;
  67
  68 /* The maximum size the stack is permitted to grow.  This is stored in
  69    the a.out header.  */
  70 static unsigned long maxstack;
  71
  72 /* The maximum data size.  This is stored in the a.out header.  */
  73 static unsigned long maxdata;
  74
  75 /* Whether to perform garbage collection.  */
  76 static int gc = 1;
  77
  78 /* The module type to use.  */
  79 static unsigned short modtype = ('1' << 8) | 'L';
  80
  81 /* Whether the .text section must be read-only (i.e., no relocs
  82    permitted).  */
  83 static int textro;
  84
  85 /* Whether to implement Unix like linker semantics.  */
  86 static int unix_ld;
  87
  88 /* Structure used to hold import file list.  */
  89
  90 struct filelist
  91 {
  92   struct filelist *next;
  93   const char *name;
  94 };
  95
  96 /* List of import files.  */
  97 static struct filelist *import_files;
  98
  99 /* List of export symbols read from the export files.  */
 100
 101 struct export_symbol_list
 102 {
 103   struct export_symbol_list *next;
 104   const char *name;
 105 };
 106
 107 static struct export_symbol_list *export_symbols;
 108
 109 /* Maintains the 32 or 64 bit mode state of import file */
 110 static unsigned int symbol_mode = 0x04;
 111
 112 /* Which symbol modes are valid */
 113 static unsigned int symbol_mode_mask = 0x0d;
 114
 115 /* Whether this is a 64 bit link */
 116 static int is_64bit = 0;
 117
 118 /* Which syscalls from import file are valid */
 119 static unsigned int syscall_mask = 0x77;
 120
 121 /* fake file for -binitfini support */
 122 static lang_input_statement_type *initfini_file;
 123
 124 /* Whether to do run time linking
 125    -brtl enables, -bnortl and -bnortllib disable. */
 126 static int rtld;
 127
 128 /* Explicit command line library path, -blibpath */
 129 static char *command_line_blibpath = NULL;
 130
 131 /* This routine is called before anything else is done.  */
 132
 133 static void
 134 gld${EMULATION_NAME}_before_parse (void)
 135 {
 136   const bfd_arch_info_type *arch = bfd_scan_arch ("${OUTPUT_ARCH}");
 137   if (arch)
 138     {
 139       ldfile_output_architecture = arch->arch;
 140       ldfile_output_machine = arch->mach;
 141       ldfile_output_machine_name = arch->printable_name;
 142     }
 143   else
 144     ldfile_output_architecture = bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`;
 145
 146   config.has_shared = TRUE;
 147
 148   /* The link_info.[init|fini]_functions are initialized in ld/lexsup.c.
 149      Override them here so we can use the link_info.init_function as a
 150      state flag that lets the backend know that -binitfini has been done.  */
 151
 152   link_info.init_function = NULL;
 153   link_info.fini_function = NULL;
 154 }
 155
 156 /* Handle AIX specific options.  */
 157
 158 enum
 159   {
 160     OPTION_IGNORE = 300,
 161     OPTION_AUTOIMP,
 162     OPTION_ERNOTOK,
 163     OPTION_EROK,
 164     OPTION_EXPORT,
 165     OPTION_IMPORT,
 166     OPTION_INITFINI,
 167     OPTION_LOADMAP,
 168     OPTION_MAXDATA,
 169     OPTION_MAXSTACK,
 170     OPTION_MODTYPE,
 171     OPTION_NOAUTOIMP,
 172     OPTION_NOSTRCMPCT,
 173     OPTION_PD,
 174     OPTION_PT,
 175     OPTION_STRCMPCT,
 176     OPTION_UNIX,
 177     OPTION_32,
 178     OPTION_64,
 179     OPTION_LIBPATH,
 180     OPTION_NOLIBPATH,
 181   };
 182
 183 static void
 184 gld${EMULATION_NAME}_add_options
 185   (int ns, char **shortopts, int nl, struct option **longopts,
 186    int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED)
 187 {
 188   static const char xtra_short[] = "D:H:KT:z";
 189   static const struct option xtra_long[] = {
 190   /* -binitfini has special handling in the linker backend.  The native linker
 191      uses the arguemnts to generate a table of init and fini functions for
 192      the executable.  The important use for this option is to support aix 4.2+
 193      c++ constructors and destructors.  This is tied into gcc via collect2.c.
 194
 195      The function table is accessed by the runtime linker/loader by checking if
 196      the first symbol in the loader symbol table is __rtinit.  The gnu linker
 197      generates this symbol and makes it the first loader symbol.  */
 198
 199     {"basis", no_argument, NULL, OPTION_IGNORE},
 200     {"bautoimp", no_argument, NULL, OPTION_AUTOIMP},
 201     {"bcomprld", no_argument, NULL, OPTION_IGNORE},
 202     {"bcrld", no_argument, NULL, OPTION_IGNORE},
 203     {"bcror31", no_argument, NULL, OPTION_IGNORE},
 204     {"bD", required_argument, NULL, OPTION_MAXDATA},
 205     {"bE", required_argument, NULL, OPTION_EXPORT},
 206     {"bernotok", no_argument, NULL, OPTION_ERNOTOK},
 207     {"berok", no_argument, NULL, OPTION_EROK},
 208     {"berrmsg", no_argument, NULL, OPTION_IGNORE},
 209     {"bexport", required_argument, NULL, OPTION_EXPORT},
 210     {"bf", no_argument, NULL, OPTION_ERNOTOK},
 211     {"bgc", no_argument, &gc, 1},
 212     {"bh", required_argument, NULL, OPTION_IGNORE},
 213     {"bhalt", required_argument, NULL, OPTION_IGNORE},
 214     {"bI", required_argument, NULL, OPTION_IMPORT},
 215     {"bimport", required_argument, NULL, OPTION_IMPORT},
 216     {"binitfini", required_argument, NULL, OPTION_INITFINI},
 217     {"bl", required_argument, NULL, OPTION_LOADMAP},
 218     {"bloadmap", required_argument, NULL, OPTION_LOADMAP},
 219     {"bmaxdata", required_argument, NULL, OPTION_MAXDATA},
 220     {"bmaxstack", required_argument, NULL, OPTION_MAXSTACK},
 221     {"bM", required_argument, NULL, OPTION_MODTYPE},
 222     {"bmodtype", required_argument, NULL, OPTION_MODTYPE},
 223     {"bnoautoimp", no_argument, NULL, OPTION_NOAUTOIMP},
 224     {"bnodelcsect", no_argument, NULL, OPTION_IGNORE},
 225     {"bnoentry", no_argument, NULL, OPTION_IGNORE},
 226     {"bnogc", no_argument, &gc, 0},
 227     {"bnso", no_argument, NULL, OPTION_NOAUTOIMP},
 228     {"bnostrcmpct", no_argument, NULL, OPTION_NOSTRCMPCT},
 229     {"bnotextro", no_argument, &textro, 0},
 230     {"bnro", no_argument, &textro, 0},
 231     {"bpD", required_argument, NULL, OPTION_PD},
 232     {"bpT", required_argument, NULL, OPTION_PT},
 233     {"bro", no_argument, &textro, 1},
 234     {"brtl", no_argument, &rtld, 1},
 235     {"bnortl", no_argument, &rtld, 0},
 236     {"bnortllib", no_argument, &rtld, 0},
 237     {"bS", required_argument, NULL, OPTION_MAXSTACK},
 238     {"bso", no_argument, NULL, OPTION_AUTOIMP},
 239     {"bstrcmpct", no_argument, NULL, OPTION_STRCMPCT},
 240     {"btextro", no_argument, &textro, 1},
 241     {"b32", no_argument, NULL, OPTION_32},
 242     {"b64", no_argument, NULL, OPTION_64},
 243     {"static", no_argument, NULL, OPTION_NOAUTOIMP},
 244     {"unix", no_argument, NULL, OPTION_UNIX},
 245     {"blibpath", required_argument, NULL, OPTION_LIBPATH},
 246     {"bnolibpath", required_argument, NULL, OPTION_NOLIBPATH},
 247     {NULL, no_argument, NULL, 0}
 248   };
 249
 250   /* Options supported by the AIX linker which we do not support: -f,
 251      -S, -v, -Z, -bbindcmds, -bbinder, -bbindopts, -bcalls, -bcaps,
 252      -bcror15, -bdebugopt, -bdbg, -bdelcsect, -bex?, -bfilelist, -bfl,
 253      -bgcbypass, -bglink, -binsert, -bi, -bloadmap, -bl, -bmap, -bnl,
 254      -bnobind, -bnocomprld, -bnocrld, -bnoerrmsg, -bnoglink,
 255      -bnoloadmap, -bnl, -bnoobjreorder, -bnoquiet, -bnoreorder,
 256      -bnotypchk, -bnox, -bquiet, -bR, -brename, -breorder, -btypchk,
 257      -bx, -bX, -bxref.  */
 258
 259   *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short));
 260   memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short));
 261   *longopts = xrealloc (*longopts,
 262                         nl * sizeof (struct option) + sizeof (xtra_long));
 263   memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
 264 }
 265
 266 static bfd_boolean
 267 gld${EMULATION_NAME}_parse_args (int argc, char **argv)
 268 {
 269   int indx;
 270
 271   /* If the current option starts with -b, change the first : to an =.
 272      The AIX linker uses : to separate the option from the argument;
 273      changing it to = lets us treat it as a getopt option.  */
 274   indx = optind;
 275   if (indx == 0)
 276     indx = 1;
 277
 278   if (indx < argc && strncmp (argv[indx], "-b", 2) == 0)
 279     {
 280       char *s;
 281
 282       for (s = argv[indx]; *s != '\0'; s++)
 283         {
 284           if (*s == ':')
 285             {
 286               *s = '=';
 287               break;
 288             }
 289         }
 290     }
 291   return FALSE;
 292 }
 293
 294 static bfd_boolean
 295 gld${EMULATION_NAME}_handle_option (int optc)
 296 {
 297   bfd_signed_vma val;
 298   const char *end;
 299
 300   switch (optc)
 301     {
 302     default:
 303       return FALSE;
 304
 305     case 0:
 306       /* Long option which just sets a flag.  */
 307       break;
 308
 309     case 'D':
 310       val = bfd_scan_vma (optarg, &end, 0);
 311       if (*end != '\0')
 312         einfo ("%P: warning: ignoring invalid -D number %s\n", optarg);
 313       else if (val != -1)
 314         lang_section_start (".data", exp_intop (val));
 315       break;
 316
 317     case 'H':
 318       val = bfd_scan_vma (optarg, &end, 0);
 319       if (*end != '\0' || (val & (val - 1)) != 0)
 320         einfo ("%P: warning: ignoring invalid -H number %s\n", optarg);
 321       else
 322         file_align = val;
 323       break;
 324
 325     case 'K':
 326     case 'z':
 327       /* FIXME: This should use the page size for the target system.  */
 328       file_align = 4096;
 329       break;
 330
 331     case 'T':
 332       /* On AIX this is the same as GNU ld -Ttext.  When we see -T
 333          number, we assume the AIX option is intended.  Otherwise, we
 334          assume the usual GNU ld -T option is intended.  We can't just
 335          ignore the AIX option, because gcc passes it to the linker.  */
 336       val = bfd_scan_vma (optarg, &end, 0);
 337       if (*end != '\0')
 338         return FALSE;
 339       lang_section_start (".text", exp_intop (val));
 340       break;
 341
 342     case OPTION_IGNORE:
 343       break;
 344
 345     case OPTION_INITFINI:
 346       {
 347         /*
 348          * The aix linker init fini has the format :
 349          *
 350          * -binitfini:[ Initial][:Termination][:Priority]
 351          *
 352          * it allows the Termination and Priority to be optional.
 353          *
 354          * Since we support only one init/fini pair, we ignore the Priority.
 355          *
 356          * Define the special symbol __rtinit.
 357          *
 358          * strtok does not correctly handle the case of -binitfini::fini: so
 359          * do it by hand
 360          */
 361         char *t, *i, *f;
 362
 363         i = t = optarg;
 364         while (*t && ':' != *t)
 365           t++;
 366         if (*t)
 367           *t++ = 0;
 368
 369         if (0 != strlen (i))
 370           link_info.init_function = i;
 371
 372         f = t;
 373         while (*t && ':' != *t)
 374           t++;
 375         *t = 0;
 376
 377         if (0 != strlen (f))
 378           link_info.fini_function = f;
 379       }
 380       break;
 381
 382     case OPTION_AUTOIMP:
 383       link_info.static_link = FALSE;
 384       break;
 385
 386     case OPTION_ERNOTOK:
 387       force_make_executable = FALSE;
 388       break;
 389
 390     case OPTION_EROK:
 391       force_make_executable = TRUE;
 392       break;
 393
 394     case OPTION_EXPORT:
 395       gld${EMULATION_NAME}_read_file (optarg, FALSE);
 396       break;
 397
 398     case OPTION_IMPORT:
 399       {
 400         struct filelist *n;
 401         struct filelist **flpp;
 402
 403         n = (struct filelist *) xmalloc (sizeof (struct filelist));
 404         n->next = NULL;
 405         n->name = optarg;
 406         flpp = &import_files;
 407         while (*flpp != NULL)
 408           flpp = &(*flpp)->next;
 409         *flpp = n;
 410       }
 411       break;
 412
 413     case OPTION_LOADMAP:
 414       config.map_filename = optarg;
 415       break;
 416
 417     case OPTION_MAXDATA:
 418       val = bfd_scan_vma (optarg, &end, 0);
 419       if (*end != '\0')
 420         einfo ("%P: warning: ignoring invalid -bmaxdata number %s\n", optarg);
 421       else
 422         maxdata = val;
 423       break;
 424
 425     case OPTION_MAXSTACK:
 426       val = bfd_scan_vma (optarg, &end, 0);
 427       if (*end != '\0')
 428         einfo ("%P: warning: ignoring invalid -bmaxstack number %s\n",
 429                optarg);
 430       else
 431         maxstack = val;
 432       break;
 433
 434     case OPTION_MODTYPE:
 435       if (*optarg == 'S')
 436         {
 437           link_info.shared = TRUE;
 438           ++optarg;
 439         }
 440       if (*optarg == '\0' || optarg[1] == '\0')
 441         einfo ("%P: warning: ignoring invalid module type %s\n", optarg);
 442       else
 443         modtype = (*optarg << 8) | optarg[1];
 444       break;
 445
 446     case OPTION_NOAUTOIMP:
 447       link_info.static_link = TRUE;
 448       break;
 449
 450     case OPTION_NOSTRCMPCT:
 451       link_info.traditional_format = TRUE;
 452       break;
 453
 454     case OPTION_PD:
 455       /* This sets the page that the .data section is supposed to
 456          start on.  The offset within the page should still be the
 457          offset within the file, so we need to build an appropriate
 458          expression.  */
 459       val = bfd_scan_vma (optarg, &end, 0);
 460       if (*end != '\0')
 461         einfo ("%P: warning: ignoring invalid -pD number %s\n", optarg);
 462       else
 463         {
 464           etree_type *t;
 465
 466           t = exp_binop ('+',
 467                          exp_intop (val),
 468                          exp_binop ('&',
 469                                     exp_nameop (NAME, "."),
 470                                     exp_intop (0xfff)));
 471           t = exp_binop ('&',
 472                          exp_binop ('+', t, exp_intop (31)),
 473                          exp_intop (~(bfd_vma) 31));
 474           lang_section_start (".data", t);
 475         }
 476       break;
 477
 478     case OPTION_PT:
 479       /* This set the page that the .text section is supposed to start
 480          on.  The offset within the page should still be the offset
 481          within the file.  */
 482       val = bfd_scan_vma (optarg, &end, 0);
 483       if (*end != '\0')
 484         einfo ("%P: warning: ignoring invalid -pT number %s\n", optarg);
 485       else
 486         {
 487           etree_type *t;
 488
 489           t = exp_binop ('+',
 490                          exp_intop (val),
 491                          exp_nameop (SIZEOF_HEADERS, NULL));
 492           t = exp_binop ('&',
 493                          exp_binop ('+', t, exp_intop (31)),
 494                          exp_intop (~(bfd_vma) 31));
 495           lang_section_start (".text", t);
 496         }
 497       break;
 498
 499     case OPTION_STRCMPCT:
 500       link_info.traditional_format = FALSE;
 501       break;
 502
 503     case OPTION_UNIX:
 504       unix_ld = TRUE;
 505       break;
 506
 507     case OPTION_32:
 508       is_64bit = 0;
 509       syscall_mask = 0x77;
 510       symbol_mode_mask = 0x0d;
 511       break;
 512
 513     case OPTION_64:
 514       is_64bit = 1;
 515       syscall_mask = 0xcc;
 516       symbol_mode_mask = 0x0e;
 517       break;
 518
 519     case OPTION_LIBPATH:
 520       command_line_blibpath = optarg;
 521       break;
 522
 523     case OPTION_NOLIBPATH:
 524       command_line_blibpath = NULL;
 525       break;
 526
 527     }
 528
 529   return TRUE;
 530 }
 531
 532 /* This is called when an input file can not be recognized as a BFD
 533    object or an archive.  If the file starts with #!, we must treat it
 534    as an import file.  This is for AIX compatibility.  */
 535
 536 static bfd_boolean
 537 gld${EMULATION_NAME}_unrecognized_file (lang_input_statement_type *entry)
 538 {
 539   FILE *e;
 540   bfd_boolean ret;
 541
 542   e = fopen (entry->filename, FOPEN_RT);
 543   if (e == NULL)
 544     return FALSE;
 545
 546   ret = FALSE;
 547
 548   if (getc (e) == '#' && getc (e) == '!')
 549     {
 550       struct filelist *n;
 551       struct filelist **flpp;
 552
 553       n = (struct filelist *) xmalloc (sizeof (struct filelist));
 554       n->next = NULL;
 555       n->name = entry->filename;
 556       flpp = &import_files;
 557       while (*flpp != NULL)
 558         flpp = &(*flpp)->next;
 559       *flpp = n;
 560
 561       ret = TRUE;
 562       entry->loaded = TRUE;
 563     }
 564
 565   fclose (e);
 566
 567   return ret;
 568 }
 569
 570 /* This is called after the input files have been opened.  */
 571
 572 static void
 573 gld${EMULATION_NAME}_after_open (void)
 574 {
 575   bfd_boolean r;
 576   struct set_info *p;
 577
 578   /* Call ldctor_build_sets, after pretending that this is a
 579      relocatable link.  We do this because AIX requires relocation
 580      entries for all references to symbols, even in a final
 581      executable.  Of course, we only want to do this if we are
 582      producing an XCOFF output file.  */
 583   r = link_info.relocatable;
 584   if (strstr (bfd_get_target (output_bfd), "xcoff") != NULL)
 585     link_info.relocatable = TRUE;
 586   ldctor_build_sets ();
 587   link_info.relocatable = r;
 588
 589   /* For each set, record the size, so that the XCOFF backend can
 590      output the correct csect length.  */
 591   for (p = sets; p != (struct set_info *) NULL; p = p->next)
 592     {
 593       bfd_size_type size;
 594
 595       /* If the symbol is defined, we may have been invoked from
 596          collect, and the sets may already have been built, so we do
 597          not do anything.  */
 598       if (p->h->type == bfd_link_hash_defined
 599           || p->h->type == bfd_link_hash_defweak)
 600         continue;
 601
 602       if (p->reloc != BFD_RELOC_CTOR)
 603         {
 604           /* Handle this if we need to.  */
 605           abort ();
 606         }
 607
 608       size = (p->count + 2) * 4;
 609       if (!bfd_xcoff_link_record_set (output_bfd, &link_info, p->h, size))
 610         einfo ("%F%P: bfd_xcoff_link_record_set failed: %E\n");
 611     }
 612 }
 613
 614 /* This is called after the sections have been attached to output
 615    sections, but before any sizes or addresses have been set.  */
 616
 617 static void
 618 gld${EMULATION_NAME}_before_allocation (void)
 619 {
 620   struct filelist *fl;
 621   struct export_symbol_list *el;
 622   char *libpath;
 623   asection *special_sections[XCOFF_NUMBER_OF_SPECIAL_SECTIONS];
 624   int i;
 625
 626   /* Handle the import and export files, if any.  */
 627   for (fl = import_files; fl != NULL; fl = fl->next)
 628     gld${EMULATION_NAME}_read_file (fl->name, TRUE);
 629   for (el = export_symbols; el != NULL; el = el->next)
 630     {
 631       struct bfd_link_hash_entry *h;
 632
 633       h = bfd_link_hash_lookup (link_info.hash, el->name, FALSE, FALSE, FALSE);
 634       if (h == NULL)
 635         einfo ("%P%F: bfd_link_hash_lookup of export symbol failed: %E\n");
 636       if (!bfd_xcoff_export_symbol (output_bfd, &link_info, h))
 637         einfo ("%P%F: bfd_xcoff_export_symbol failed: %E\n");
 638     }
 639
 640   /* Track down all relocations called for by the linker script (these
 641      are typically constructor/destructor entries created by
 642      CONSTRUCTORS) and let the backend know it will need to create
 643      .loader relocs for them.  */
 644   lang_for_each_statement (gld${EMULATION_NAME}_find_relocs);
 645
 646   /* Precedence of LIBPATH
 647      -blibpath:  native support always first
 648      -rpath:     gnu extension
 649      -L          build from command line -L's */
 650   if (command_line_blibpath != NULL)
 651     libpath = command_line_blibpath;
 652   else if (command_line.rpath != NULL)
 653     libpath = command_line.rpath;
 654   else if (search_head == NULL)
 655     libpath = (char *) "";
 656   else
 657     {
 658       size_t len;
 659       search_dirs_type *search;
 660
 661       len = strlen (search_head->name);
 662       libpath = xmalloc (len + 1);
 663       strcpy (libpath, search_head->name);
 664       for (search = search_head->next; search != NULL; search = search->next)
 665         {
 666           size_t nlen;
 667
 668           nlen = strlen (search->name);
 669           libpath = xrealloc (libpath, len + nlen + 2);
 670           libpath[len] = ':';
 671           strcpy (libpath + len + 1, search->name);
 672           len += nlen + 1;
 673         }
 674     }
 675
 676   /* Let the XCOFF backend set up the .loader section.  */
 677   if (!bfd_xcoff_size_dynamic_sections
 678       (output_bfd, &link_info, libpath, entry_symbol.name, file_align,
 679        maxstack, maxdata, gc && !unix_ld ? TRUE : FALSE,
 680        modtype, textro ? TRUE : FALSE, unix_ld, special_sections,
 681        rtld ? TRUE : FALSE))
 682     einfo ("%P%F: failed to set dynamic section sizes: %E\n");
 683
 684   /* Look through the special sections, and put them in the right
 685      place in the link ordering.  This is especially magic.  */
 686   for (i = 0; i < XCOFF_NUMBER_OF_SPECIAL_SECTIONS; i++)
 687     {
 688       asection *sec;
 689       lang_output_section_statement_type *os;
 690       lang_statement_union_type **pls;
 691       lang_input_section_type *is;
 692       const char *oname;
 693       bfd_boolean start;
 694
 695       sec = special_sections[i];
 696       if (sec == NULL)
 697         continue;
 698
 699       /* Remove this section from the list of the output section.
 700          This assumes we know what the script looks like.  */
 701       is = NULL;
 702       os = lang_output_section_find (sec->output_section->name);
 703       if (os == NULL)
 704         einfo ("%P%F: can't find output section %s\n",
 705                sec->output_section->name);
 706
 707       for (pls = &os->children.head; *pls != NULL; pls = &(*pls)->header.next)
 708         {
 709           if ((*pls)->header.type == lang_input_section_enum
 710               && (*pls)->input_section.section == sec)
 711             {
 712               is = (lang_input_section_type *) * pls;
 713               *pls = (*pls)->header.next;
 714               break;
 715             }
 716
 717           if ((*pls)->header.type == lang_wild_statement_enum)
 718             {
 719               lang_statement_union_type **pwls;
 720
 721               for (pwls = &(*pls)->wild_statement.children.head;
 722                    *pwls != NULL; pwls = &(*pwls)->header.next)
 723                 {
 724
 725                   if ((*pwls)->header.type == lang_input_section_enum
 726                       && (*pwls)->input_section.section == sec)
 727                     {
 728                       is = (lang_input_section_type *) * pwls;
 729                       *pwls = (*pwls)->header.next;
 730                       break;
 731                     }
 732                 }
 733
 734               if (is != NULL)
 735                 break;
 736             }
 737         }
 738
 739       if (is == NULL)
 740         {
 741           einfo ("%P%F: can't find %s in output section\n",
 742                  bfd_get_section_name (sec->owner, sec));
 743         }
 744
 745       /* Now figure out where the section should go.  */
 746       switch (i)
 747         {
 748
 749         default:                /* to avoid warnings */
 750         case XCOFF_SPECIAL_SECTION_TEXT:
 751           /* _text */
 752           oname = ".text";
 753           start = TRUE;
 754           break;
 755
 756         case XCOFF_SPECIAL_SECTION_ETEXT:
 757           /* _etext */
 758           oname = ".text";
 759           start = FALSE;
 760           break;
 761
 762         case XCOFF_SPECIAL_SECTION_DATA:
 763           /* _data */
 764           oname = ".data";
 765           start = TRUE;
 766           break;
 767
 768         case XCOFF_SPECIAL_SECTION_EDATA:
 769           /* _edata */
 770           oname = ".data";
 771           start = FALSE;
 772           break;
 773
 774         case XCOFF_SPECIAL_SECTION_END:
 775         case XCOFF_SPECIAL_SECTION_END2:
 776           /* _end and end */
 777           oname = ".bss";
 778           start = FALSE;
 779           break;
 780         }
 781
 782       os = lang_output_section_find (oname);
 783
 784       if (start)
 785         {
 786           is->header.next = os->children.head;
 787           os->children.head = (lang_statement_union_type *) is;
 788         }
 789       else
 790         {
 791           is->header.next = NULL;
 792           lang_statement_append (&os->children,
 793                                  (lang_statement_union_type *) is,
 794                                  &is->header.next);
 795         }
 796     }
 797 }
 798
 799 static char *
 800 gld${EMULATION_NAME}_choose_target (int argc, char **argv)
 801 {
 802   int i, j, jmax;
 803   static char *from_outside;
 804   static char *from_inside;
 805   static char *argv_to_target[][2] = {
 806     {NULL,   "${OUTPUT_FORMAT}"},
 807     {"-b32", "${OUTPUT_FORMAT_32BIT}"},
 808     {"-b64", "${OUTPUT_FORMAT_64BIT}"},
 809   };
 810
 811   jmax = 3;
 812
 813   from_outside = getenv (TARGET_ENVIRON);
 814   if (from_outside != (char *) NULL)
 815     return from_outside;
 816
 817   /* Set to default. */
 818   from_inside = argv_to_target[0][1];
 819   for (i = 1; i < argc; i++)
 820     {
 821       for (j = 1; j < jmax; j++)
 822         {
 823           if (0 == strcmp (argv[i], argv_to_target[j][0]))
 824             from_inside = argv_to_target[j][1];
 825         }
 826     }
 827
 828   return from_inside;
 829 }
 830
 831 /* Returns
 832    1 : state changed
 833    0 : no change */
 834 static int
 835 change_symbol_mode (char *input)
 836 {
 837   char *symbol_mode_string[] = {
 838     "# 32",                     /* 0x01 */
 839     "# 64",                     /* 0x02 */
 840     "# no32",                   /* 0x04 */
 841     "# no64",                   /* 0x08 */
 842     NULL,
 843   };
 844
 845   unsigned int bit;
 846   char *string;
 847
 848   for (bit = 0;; bit++)
 849     {
 850       string = symbol_mode_string[bit];
 851       if (string == NULL)
 852         return 0;
 853
 854       if (0 == strcmp (input, string))
 855         {
 856           symbol_mode = (1 << bit);
 857           return 1;
 858         }
 859     }
 860   /* should not be here */
 861   return 0;
 862 }
 863
 864 /* Returns
 865    1 : yes
 866    0 : ignore
 867    -1 : error, try something else */
 868 static int
 869 is_syscall (char *input, unsigned int *flag)
 870 {
 871   unsigned int bit;
 872   char *string;
 873
 874   struct sc {
 875     char *syscall_string;
 876     unsigned int flag;
 877   } s [] = {
 878     { "svc"         /* 0x01 */, XCOFF_SYSCALL32 },
 879     { "svc32"       /* 0x02 */, XCOFF_SYSCALL32 },
 880     { "svc3264"     /* 0x04 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 },
 881     { "svc64"       /* 0x08 */, XCOFF_SYSCALL64 },
 882     { "syscall"     /* 0x10 */, XCOFF_SYSCALL32 },
 883     { "syscall32"   /* 0x20 */, XCOFF_SYSCALL32 },
 884     { "syscall3264" /* 0x40 */, XCOFF_SYSCALL32 | XCOFF_SYSCALL64 },
 885     { "syscall64"   /* 0x80 */, XCOFF_SYSCALL64 },
 886     { NULL, 0 },
 887   };
 888
 889   *flag = 0;
 890
 891   for (bit = 0;; bit++)
 892     {
 893       string = s[bit].syscall_string;
 894       if (string == NULL)
 895         return -1;
 896
 897       if (0 == strcmp (input, string))
 898         {
 899           if (1 << bit & syscall_mask)
 900             {
 901               *flag = s[bit].flag;
 902               return 1;
 903             }
 904           else
 905             {
 906               return 0;
 907             }
 908         }
 909     }
 910   /* should not be here */
 911   return -1;
 912 }
 913
 914 /* Read an import or export file.  For an import file, this is called
 915    by the before_allocation emulation routine.  For an export file,
 916    this is called by the handle_option emulation routine.  */
 917
 918 static void
 919 gld${EMULATION_NAME}_read_file (const char *filename, bfd_boolean import)
 920 {
 921   struct obstack *o;
 922   FILE *f;
 923   int lineno;
 924   int c;
 925   bfd_boolean keep;
 926   const char *imppath;
 927   const char *impfile;
 928   const char *impmember;
 929
 930   o = (struct obstack *) xmalloc (sizeof (struct obstack));
 931   obstack_specify_allocation (o, 0, 0, xmalloc, gld${EMULATION_NAME}_free);
 932
 933   f = fopen (filename, FOPEN_RT);
 934   if (f == NULL)
 935     {
 936       bfd_set_error (bfd_error_system_call);
 937       einfo ("%F%s: %E\n", filename);
 938     }
 939
 940   keep = FALSE;
 941
 942   imppath = NULL;
 943   impfile = NULL;
 944   impmember = NULL;
 945
 946   lineno = 0;
 947
 948   /* Default to 32 and 64 bit mode
 949      symbols at top of /lib/syscalls.exp do not have a mode modifier and they
 950      are not repeated, assume 64 bit routines also want to use them.
 951      See the routine change_symbol_mode for more information.  */
 952
 953   symbol_mode = 0x04;
 954
 955   while ((c = getc (f)) != EOF)
 956     {
 957       char *s;
 958       char *symname;
 959       unsigned int syscall_flag = 0;
 960       bfd_vma address;
 961       struct bfd_link_hash_entry *h;
 962
 963       if (c != '\n')
 964         {
 965           obstack_1grow (o, c);
 966           continue;
 967         }
 968
 969       obstack_1grow (o, '\0');
 970       ++lineno;
 971
 972       s = (char *) obstack_base (o);
 973       while (ISSPACE (*s))
 974         ++s;
 975       if (*s == '\0'
 976           || *s == '*'
 977           || change_symbol_mode (s)
 978           || (*s == '#' && s[1] == ' ')
 979           || (!import && *s == '#' && s[1] == '!'))
 980         {
 981           obstack_free (o, obstack_base (o));
 982           continue;
 983         }
 984
 985       if (*s == '#' && s[1] == '!')
 986         {
 987           s += 2;
 988           while (ISSPACE (*s))
 989             ++s;
 990           if (*s == '\0')
 991             {
 992               imppath = NULL;
 993               impfile = NULL;
 994               impmember = NULL;
 995               obstack_free (o, obstack_base (o));
 996             }
 997           else if (*s == '(')
 998             einfo ("%F%s%d: #! ([member]) is not supported in import files\n",
 999                    filename, lineno);
1000           else
1001             {
1002               char cs;
1003               char *file;
1004
1005               (void) obstack_finish (o);
1006               keep = TRUE;
1007               imppath = s;
1008               file = NULL;
1009               while (!ISSPACE (*s) && *s != '(' && *s != '\0')
1010                 {
1011                   if (*s == '/')
1012                     file = s + 1;
1013                   ++s;
1014                 }
1015               if (file != NULL)
1016                 {
1017                   file[-1] = '\0';
1018                   impfile = file;
1019                   if (imppath == file - 1)
1020                     imppath = "/";
1021                 }
1022               else
1023                 {
1024                   impfile = imppath;
1025                   imppath = "";
1026                 }
1027               cs = *s;
1028               *s = '\0';
1029               while (ISSPACE (cs))
1030                 {
1031                   ++s;
1032                   cs = *s;
1033                 }
1034               if (cs != '(')
1035                 {
1036                   impmember = "";
1037                   if (cs != '\0')
1038                     einfo ("%s:%d: warning: syntax error in import file\n",
1039                            filename, lineno);
1040                 }
1041               else
1042                 {
1043                   ++s;
1044                   impmember = s;
1045                   while (*s != ')' && *s != '\0')
1046                     ++s;
1047                   if (*s == ')')
1048                     *s = '\0';
1049                   else
1050                     einfo ("%s:%d: warning: syntax error in import file\n",
1051                            filename, lineno);
1052                 }
1053             }
1054
1055           continue;
1056         }
1057
1058       if (symbol_mode & symbol_mode_mask)
1059         {
1060           /* This is a symbol to be imported or exported.  */
1061           symname = s;
1062           syscall_flag = 0;
1063           address = (bfd_vma) -1;
1064
1065           while (!ISSPACE (*s) && *s != '\0')
1066             ++s;
1067           if (*s != '\0')
1068             {
1069               char *se;
1070
1071               *s++ = '\0';
1072
1073               while (ISSPACE (*s))
1074                 ++s;
1075
1076               se = s;
1077               while (!ISSPACE (*se) && *se != '\0')
1078                 ++se;
1079               if (*se != '\0')
1080                 {
1081                   *se++ = '\0';
1082                   while (ISSPACE (*se))
1083                     ++se;
1084                   if (*se != '\0')
1085                     einfo ("%s%d: warning: syntax error in import/export file\n",
1086                            filename, lineno);
1087                 }
1088
1089               if (s != se)
1090                 {
1091                   int status;
1092                   const char *end;
1093
1094                   status = is_syscall (s, &syscall_flag);
1095
1096                   if (0 > status)
1097                     {
1098                       /* not a system call, check for address */
1099                       address = bfd_scan_vma (s, &end, 0);
1100                       if (*end != '\0')
1101                         {
1102                           einfo ("%s:%d: warning: syntax error in import/export file\n",
1103                                  filename, lineno);
1104
1105                         }
1106                     }
1107                 }
1108             }
1109
1110           if (!import)
1111             {
1112               struct export_symbol_list *n;
1113
1114               ldlang_add_undef (symname);
1115               n = ((struct export_symbol_list *)
1116                    xmalloc (sizeof (struct export_symbol_list)));
1117               n->next = export_symbols;
1118               n->name = xstrdup (symname);
1119               export_symbols = n;
1120             }
1121           else
1122             {
1123               h = bfd_link_hash_lookup (link_info.hash, symname, FALSE, FALSE,
1124                                         TRUE);
1125               if (h == NULL || h->type == bfd_link_hash_new)
1126                 {
1127                   /* We can just ignore attempts to import an unreferenced
1128                      symbol.  */
1129                 }
1130               else
1131                 {
1132                   if (!bfd_xcoff_import_symbol (output_bfd, &link_info, h,
1133                                                 address, imppath, impfile,
1134                                                 impmember, syscall_flag))
1135                     einfo ("%X%s:%d: failed to import symbol %s: %E\n",
1136                            filename, lineno, symname);
1137                 }
1138             }
1139         }
1140       obstack_free (o, obstack_base (o));
1141     }
1142
1143   if (obstack_object_size (o) > 0)
1144     {
1145       einfo ("%s:%d: warning: ignoring unterminated last line\n",
1146              filename, lineno);
1147       obstack_free (o, obstack_base (o));
1148     }
1149
1150   if (!keep)
1151     {
1152       obstack_free (o, NULL);
1153       free (o);
1154     }
1155 }
1156
1157 /* This routine saves us from worrying about declaring free.  */
1158
1159 static void
1160 gld${EMULATION_NAME}_free (void *p)
1161 {
1162   free (p);
1163 }
1164
1165 /* This is called by the before_allocation routine via
1166    lang_for_each_statement.  It looks for relocations and assignments
1167    to symbols.  */
1168
1169 static void
1170 gld${EMULATION_NAME}_find_relocs (lang_statement_union_type *s)
1171 {
1172   if (s->header.type == lang_reloc_statement_enum)
1173     {
1174       lang_reloc_statement_type *rs;
1175
1176       rs = &s->reloc_statement;
1177       if (rs->name == NULL)
1178         einfo ("%F%P: only relocations against symbols are permitted\n");
1179       if (!bfd_xcoff_link_count_reloc (output_bfd, &link_info, rs->name))
1180         einfo ("%F%P: bfd_xcoff_link_count_reloc failed: %E\n");
1181     }
1182
1183   if (s->header.type == lang_assignment_statement_enum)
1184     gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp);
1185 }
1186
1187 /* Look through an expression for an assignment statement.  */
1188
1189 static void
1190 gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp)
1191 {
1192   struct bfd_link_hash_entry *h;
1193
1194   switch (exp->type.node_class)
1195     {
1196     case etree_provide:
1197       h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst,
1198                                 FALSE, FALSE, FALSE);
1199       if (h == NULL)
1200         break;
1201       /* Fall through.  */
1202     case etree_assign:
1203       if (strcmp (exp->assign.dst, ".") != 0)
1204         {
1205           if (!bfd_xcoff_record_link_assignment (output_bfd, &link_info,
1206                                                  exp->assign.dst))
1207             einfo ("%P%F: failed to record assignment to %s: %E\n",
1208                    exp->assign.dst);
1209         }
1210       gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src);
1211       break;
1212
1213     case etree_binary:
1214       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs);
1215       gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs);
1216       break;
1217
1218     case etree_trinary:
1219       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond);
1220       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs);
1221       gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs);
1222       break;
1223
1224     case etree_unary:
1225       gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child);
1226       break;
1227
1228     default:
1229       break;
1230     }
1231 }
1232
1233 static char *
1234 gld${EMULATION_NAME}_get_script (int *isfile)
1235 EOF
1236
1237 if test -n "$COMPILE_IN"
1238 then
1239 # Scripts compiled in.
1240
1241 # sed commands to quote an ld script as a C string.
1242 sc="-f ${srcdir}/emultempl/ostring.sed"
1243
1244 cat >>e${EMULATION_NAME}.c <<EOF
1245 {
1246   *isfile = 0;
1247
1248   if (link_info.relocatable && config.build_constructors)
1249     return
1250 EOF
1251 sed $sc ldscripts/${EMULATION_NAME}.xu                 >> e${EMULATION_NAME}.c
1252 echo '  ; else if (link_info.relocatable) return'     >> e${EMULATION_NAME}.c
1253 sed $sc ldscripts/${EMULATION_NAME}.xr                 >> e${EMULATION_NAME}.c
1254 echo '  ; else if (!config.text_read_only) return'     >> e${EMULATION_NAME}.c
1255 sed $sc ldscripts/${EMULATION_NAME}.xbn                >> e${EMULATION_NAME}.c
1256 echo '  ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c
1257 sed $sc ldscripts/${EMULATION_NAME}.xn                 >> e${EMULATION_NAME}.c
1258 echo '  ; else return'                                 >> e${EMULATION_NAME}.c
1259 sed $sc ldscripts/${EMULATION_NAME}.x                  >> e${EMULATION_NAME}.c
1260 echo '; }'                                             >> e${EMULATION_NAME}.c
1261
1262 else
1263 # Scripts read from the filesystem.
1264
1265 cat >>e${EMULATION_NAME}.c <<EOF
1266 {
1267   *isfile = 1;
1268
1269   if (link_info.relocatable && config.build_constructors)
1270     return "ldscripts/${EMULATION_NAME}.xu";
1271   else if (link_info.relocatable)
1272     return "ldscripts/${EMULATION_NAME}.xr";
1273   else if (!config.text_read_only)
1274     return "ldscripts/${EMULATION_NAME}.xbn";
1275   else if (!config.magic_demand_paged)
1276     return "ldscripts/${EMULATION_NAME}.xn";
1277   else
1278     return "ldscripts/${EMULATION_NAME}.x";
1279 }
1280 EOF
1281
1282 fi
1283
1284 cat >>e${EMULATION_NAME}.c <<EOF
1285
1286 static void
1287 gld${EMULATION_NAME}_create_output_section_statements (void)
1288 {
1289   /* __rtinit */
1290   if ((bfd_get_flavour (output_bfd) == bfd_target_xcoff_flavour)
1291       && (link_info.init_function != NULL
1292           || link_info.fini_function != NULL
1293           || rtld))
1294     {
1295       initfini_file = lang_add_input_file ("initfini",
1296                                            lang_input_file_is_file_enum,
1297                                            NULL);
1298
1299       initfini_file->the_bfd = bfd_create ("initfini", output_bfd);
1300       if (initfini_file->the_bfd == NULL
1301           || ! bfd_set_arch_mach (initfini_file->the_bfd,
1302                                   bfd_get_arch (output_bfd),
1303                                   bfd_get_mach (output_bfd)))
1304         {
1305           einfo ("%X%P: can not create BFD %E\n");
1306           return;
1307         }
1308
1309       /* Call backend to fill in the rest */
1310       if (! bfd_xcoff_link_generate_rtinit (initfini_file->the_bfd,
1311                                             link_info.init_function,
1312                                             link_info.fini_function,
1313                                             rtld))
1314         {
1315           einfo ("%X%P: can not create BFD %E\n");
1316           return;
1317         }
1318
1319       /* __rtld defined in /lib/librtl.a */
1320       if (rtld)
1321         lang_add_input_file ("rtl", lang_input_file_is_l_enum, NULL);
1322     }
1323 }
1324
1325 static void
1326 gld${EMULATION_NAME}_set_output_arch (void)
1327 {
1328   bfd_set_arch_mach (output_bfd,
1329                      bfd_xcoff_architecture (output_bfd),
1330                      bfd_xcoff_machine (output_bfd));
1331
1332   ldfile_output_architecture = bfd_get_arch (output_bfd);
1333   ldfile_output_machine = bfd_get_mach (output_bfd);
1334   ldfile_output_machine_name = bfd_printable_name (output_bfd);
1335 }
1336
1337 struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = {
1338   gld${EMULATION_NAME}_before_parse,
1339   syslib_default,
1340   hll_default,
1341   after_parse_default,
1342   gld${EMULATION_NAME}_after_open,
1343   after_allocation_default,
1344   gld${EMULATION_NAME}_set_output_arch,
1345   gld${EMULATION_NAME}_choose_target,
1346   gld${EMULATION_NAME}_before_allocation,
1347   gld${EMULATION_NAME}_get_script,
1348   "${EMULATION_NAME}",
1349   "${OUTPUT_FORMAT}",
1350   0,                            /* finish */
1351   gld${EMULATION_NAME}_create_output_section_statements,
1352   0,                            /* open_dynamic_archive */
1353   0,                            /* place_orphan */
1354   0,                            /* set_symbols */
1355   gld${EMULATION_NAME}_parse_args,
1356   gld${EMULATION_NAME}_add_options,
1357   gld${EMULATION_NAME}_handle_option,
1358   gld${EMULATION_NAME}_unrecognized_file,
1359   NULL,                         /* list_options */
1360   NULL,                         /* recognized_file */
1361   NULL,                         /* find potential_libraries */
1362   NULL                          /* new_vers_pattern */
1363 };
1364 EOF